Bump version to 0.9.3

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>

.gitignore

@@ -4,6 +4,8 @@
 *.swp
 *~$
 cscope.*
+compile_commands.json
+/.clangd
 tags
 /build
 /obj*

.gitlab-ci.yml

@@ -4,9 +4,8 @@ variables:
   CENTOS7_BUILD: buildenv-centos7
   TUMBLEWEED_BUILD: buildenv-tumbleweed
   MINGW_BUILD: buildenv-mingw
-  DEBIAN_CROSS_BUILD: buildenv-debian-cross
 
-# torture_auth fails on centos7 docker images, so we don't use -DCLIENT_TESTING=ON
+# pkd tests fail on CentOS7 docker images, so we don't use -DSERVER_TESTING=ON
 centos7/openssl_1.0.x/x86_64:
   image: $CI_REGISTRY/$BUILD_IMAGES_PROJECT:$CENTOS7_BUILD
   script:
@@ -14,7 +13,7 @@ centos7/openssl_1.0.x/x86_64:
     -DCMAKE_BUILD_TYPE=RelWithDebInfo
     -DPICKY_DEVELOPER=ON
     -DWITH_SFTP=ON -DWITH_SERVER=ON -DWITH_ZLIB=ON -DWITH_PCAP=ON
-    -DUNIT_TESTING=ON .. &&
+    -DUNIT_TESTING=ON -DCLIENT_TESTING=ON .. &&
     make -j$(nproc) && ctest --output-on-failure
   tags:
   - shared
@@ -34,6 +33,7 @@ fedora/openssl_1.1.x/x86_64:
     -DPICKY_DEVELOPER=ON
     -DWITH_BLOWFISH_CIPHER=ON
     -DWITH_SFTP=ON -DWITH_SERVER=ON -DWITH_ZLIB=ON -DWITH_PCAP=ON
+    -DWITH_DEBUG_CRYPTO=ON
     -DWITH_DEBUG_PACKET=ON -DWITH_DEBUG_CALLTRACE=ON
     -DUNIT_TESTING=ON -DCLIENT_TESTING=ON -DSERVER_TESTING=ON .. &&
     make -j$(nproc) && ctest --output-on-failure
@@ -153,6 +153,8 @@ fedora/undefined-sanitizer:
       - obj/
 
 fedora/csbuild:
+  variables:
+      GIT_DEPTH: "100"
   image: $CI_REGISTRY/$BUILD_IMAGES_PROJECT:$FEDORA_BUILD
   script:
   - |
@@ -168,8 +170,7 @@ fedora/csbuild:
 
   - csbuild
     --build-dir=obj-csbuild
-    --prep-cmd="rm -rf CMakeFiles CMakeCache.txt && cmake -DCMAKE_BUILD_TYPE=Debug -DPICKY_DEVELOPER=ON -DUNIT_TESTING=ON -DCLIENT_TESTING=ON -DSERVER_TESTING=ON -DFUZZ_TESTING=ON @SRCDIR@"
-    --build-cmd "make clean && make -j$(nproc)"
+    --build-cmd "rm -rf CMakeFiles CMakeCache.txt && cmake -DCMAKE_BUILD_TYPE=Debug -DPICKY_DEVELOPER=ON -DUNIT_TESTING=ON -DCLIENT_TESTING=ON -DSERVER_TESTING=ON -DFUZZ_TESTING=ON @SRCDIR@ && make clean && make -j$(nproc)"
     --git-commit-range $CI_COMMIT_RANGE
     --color
     --print-current --print-fixed
@@ -215,7 +216,7 @@ fedora/libgcrypt/x86_64:
     -DPICKY_DEVELOPER=ON
     -DWITH_SFTP=ON -DWITH_SERVER=ON -DWITH_ZLIB=ON -DWITH_PCAP=ON
     -DUNIT_TESTING=ON -DCLIENT_TESTING=ON -DSERVER_TESTING=ON
-    -DWITH_GCRYPT=ON .. &&
+    -DWITH_GCRYPT=ON -DWITH_DEBUG_CRYPTO=ON .. &&
     make -j$(nproc) && ctest --output-on-failure
   tags:
   - shared
@@ -235,7 +236,7 @@ fedora/mbedtls/x86_64:
     -DPICKY_DEVELOPER=ON
     -DWITH_SFTP=ON -DWITH_SERVER=ON -DWITH_ZLIB=ON -DWITH_PCAP=ON
     -DUNIT_TESTING=ON -DCLIENT_TESTING=ON -DSERVER_TESTING=ON
-    -DWITH_MBEDTLS=ON .. &&
+    -DWITH_MBEDTLS=ON -DWITH_DEBUG_CRYPTO=ON .. &&
     make -j$(nproc) && ctest --output-on-failure
   tags:
   - shared
@@ -295,33 +296,6 @@ fedora/mingw32:
     paths:
       - obj/
 
-.Debian.cross.template: &Debian_cross_template
-  stage: test
-  image: $CI_REGISTRY/$BUILD_IMAGES_PROJECT:$DEBIAN_CROSS_BUILD
-  script:
-  - build=$(dpkg-architecture -qDEB_HOST_GNU_TYPE)
-  - host="${CI_JOB_NAME#*.cross.}"
-  - mkdir -p obj && cd obj && cmake
-    -DCMAKE_C_COMPILER="$(which $host-gcc)"
-    -DCMAKE_CXX_COMPILER="$(which $host-g++)"
-    -DCMAKE_BUILD_TYPE=RelWithDebInfo
-    -DUNIT_TESTING=ON -DWITH_SFTP=ON -DWITH_SERVER=ON -DWITH_ZLIB=ON
-    -DWITH_PCAP=ON .. &&
-    make -j$(nproc) &&
-    ctest --output-on-failure
-  tags:
-  - shared
-  except:
-  - tags
-  artifacts:
-    expire_in: 1 week
-    when: on_failure
-    paths:
-      - obj/
-
-.Debian.cross.mips-linux-gnu:
-  <<: *Debian_cross_template
-
 tumbleweed/openssl_1.1.x/x86_64/gcc:
   image: $CI_REGISTRY/$BUILD_IMAGES_PROJECT:$TUMBLEWEED_BUILD
   script:
@@ -330,7 +304,7 @@ tumbleweed/openssl_1.1.x/x86_64/gcc:
     -DPICKY_DEVELOPER=ON
     -DWITH_SFTP=ON -DWITH_SERVER=ON -DWITH_ZLIB=ON -DWITH_PCAP=ON
     -DKRB5_CONFIG=/usr/lib/mit/bin/krb5-config
-    -DUNIT_TESTING=ON -DCLIENT_TESTING=ON -DSERVER_TESTING=ON .. &&
+    -DUNIT_TESTING=ON -DSERVER_TESTING=ON .. &&
     make -j$(nproc) && ctest --output-on-failure
   tags:
   - shared
@@ -371,7 +345,7 @@ tumbleweed/openssl_1.1.x/x86_64/gcc7:
     -DPICKY_DEVELOPER=ON
     -DWITH_SFTP=ON -DWITH_SERVER=ON -DWITH_ZLIB=ON -DWITH_PCAP=ON
     -DKRB5_CONFIG=/usr/lib/mit/bin/krb5-config
-    -DUNIT_TESTING=ON -DCLIENT_TESTING=ON -DSERVER_TESTING=ON .. &&
+    -DUNIT_TESTING=ON -DSERVER_TESTING=ON .. &&
     make -j$(nproc) && ctest --output-on-failure
   tags:
   - shared
@@ -413,7 +387,8 @@ tumbleweed/openssl_1.1.x/x86_64/clang:
     -DPICKY_DEVELOPER=ON
     -DWITH_SFTP=ON -DWITH_SERVER=ON -DWITH_ZLIB=ON -DWITH_PCAP=ON
     -DKRB5_CONFIG=/usr/lib/mit/bin/krb5-config
-    -DUNIT_TESTING=ON -DCLIENT_TESTING=ON -DSERVER_TESTING=ON .. &&
+    -DUNIT_TESTING=ON
+    -DSERVER_TESTING=ON .. &&
     make -j$(nproc) && ctest --output-on-failure
   tags:
   - shared
@@ -446,7 +421,7 @@ tumbleweed/undefined-sanitizer:
     -DCMAKE_BUILD_TYPE=UndefinedSanitizer
     -DPICKY_DEVELOPER=ON
     -DWITH_SFTP=ON -DWITH_SERVER=ON -DWITH_ZLIB=ON -DWITH_PCAP=ON
-    -DUNIT_TESTING=ON -DCLIENT_TESTING=ON -DSERVER_TESTING=ON .. &&
+    -DUNIT_TESTING=ON -DSERVER_TESTING=ON .. &&
     make -j$(nproc) && ctest --output-on-failure
   tags:
   - shared
@@ -468,7 +443,7 @@ tumbleweed/static-analysis:
     -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++
     -DPICKY_DEVELOPER=ON
     -DWITH_SFTP=ON -DWITH_SERVER=ON -DWITH_ZLIB=ON -DWITH_PCAP=ON
-    -DUNIT_TESTING=ON -DCLIENT_TESTING=ON -DSERVER_TESTING=ON .. &&
+    -DUNIT_TESTING=ON -DSERVER_TESTING=ON .. &&
     scan-build --status-bugs -o scan make -j$(nproc)
   tags:
   - shared

CMakeLists.txt

@@ -10,7 +10,7 @@ list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules")
 include(DefineCMakeDefaults)
 include(DefineCompilerFlags)
 
-project(libssh VERSION 0.8.90 LANGUAGES C)
+project(libssh VERSION 0.9.3 LANGUAGES C)
 
 # global needed variable
 set(APPLICATION_NAME ${PROJECT_NAME})
@@ -22,16 +22,16 @@ set(APPLICATION_NAME ${PROJECT_NAME})
 #     Increment AGE. Set REVISION to 0
 #   If the source code was changed, but there were no interface changes:
 #     Increment REVISION.
-set(LIBRARY_VERSION "4.8.1")
+set(LIBRARY_VERSION "4.8.4")
 set(LIBRARY_SOVERSION "4")
 
 # where to look first for cmake modules, before ${CMAKE_ROOT}/Modules/ is checked
 
 # add definitions
 include(DefinePlatformDefaults)
-include(DefineInstallationPaths)
 include(DefineOptions.cmake)
 include(CPackConfig.cmake)
+include(GNUInstallDirs)
 
 include(CompilerChecks.cmake)
 
@@ -117,7 +117,7 @@ install(
   FILES
     ${CMAKE_CURRENT_BINARY_DIR}/libssh.pc
   DESTINATION
-    ${LIB_INSTALL_DIR}/pkgconfig
+    ${CMAKE_INSTALL_LIBDIR}/pkgconfig
   COMPONENT
     pkgconfig
 )
@@ -133,21 +133,13 @@ write_basic_package_version_file(libssh-config-version.cmake
                                  VERSION ${PROJECT_VERSION}
                                  COMPATIBILITY SameMajorVersion)
 
-# libssh-config.cmake
-configure_package_config_file(${PROJECT_NAME}-config.cmake.in
-                              ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake
-                              INSTALL_DESTINATION ${CMAKE_INSTALL_DIR}/${PROJECT_NAME}
-                              PATH_VARS INCLUDE_INSTALL_DIR LIB_INSTALL_DIR)
-
 install(
     FILES
-        ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake
         ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config-version.cmake
     DESTINATION
-        ${CMAKE_INSTALL_DIR}/${PROJECT_NAME}
+        ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}
     COMPONENT
-        devel
-)
+        devel)
 
 if (WITH_EXAMPLES)
     add_subdirectory(examples)
@@ -213,6 +205,11 @@ endif (WITH_SYMBOL_VERSIONING AND ABIMAP_FOUND)
 
 add_custom_target(dist COMMAND ${CMAKE_MAKE_PROGRAM} package_source DEPENDS ${_SYMBOL_TARGET})
 
+# Link compile database for clangd
+execute_process(COMMAND cmake -E create_symlink
+                "${CMAKE_BINARY_DIR}/compile_commands.json"
+                "${CMAKE_SOURCE_DIR}/compile_commands.json")
+
 message(STATUS "********************************************")
 message(STATUS "********** ${PROJECT_NAME} build options : **********")
 
@@ -225,7 +222,7 @@ message(STATUS "Server support : ${WITH_SERVER}")
 message(STATUS "GSSAPI support : ${WITH_GSSAPI}")
 message(STATUS "GEX support : ${WITH_GEX}")
 message(STATUS "Pcap debugging support : ${WITH_PCAP}")
-message(STATUS "With static library: ${WITH_STATIC_LIB}")
+message(STATUS "Build shared library: ${BUILD_SHARED_LIBS}")
 message(STATUS "Unit testing: ${UNIT_TESTING}")
 message(STATUS "Client code testing: ${CLIENT_TESTING}")
 message(STATUS "Blowfish cipher support: ${WITH_BLOWFISH_CIPHER}")

CPackConfig.cmake

@@ -10,7 +10,7 @@ set(CPACK_PACKAGE_VERSION ${PROJECT_VERSION})
 
 # SOURCE GENERATOR
 set(CPACK_SOURCE_GENERATOR "TXZ")
-set(CPACK_SOURCE_IGNORE_FILES "~$;[.]swp$;/[.]git/;.gitignore;/build*;/obj*;tags;cscope.*")
+set(CPACK_SOURCE_IGNORE_FILES "~$;[.]swp$;/[.]git/;/[.]clangd/;.gitignore;/build*;/obj*;tags;cscope.*;compile_commands.json;.*\.patch")
 set(CPACK_SOURCE_PACKAGE_FILE_NAME "${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSION}")
 
 ### NSIS INSTALLER
@@ -23,7 +23,7 @@ if (WIN32)
         set(CPACK_GENERATOR "${CPACK_GENERATOR};NSIS")
         set(CPACK_NSIS_DISPLAY_NAME "The SSH Library")
         set(CPACK_NSIS_COMPRESSOR "/SOLID zlib")
-        set(CPACK_NSIS_MENU_LINKS "http://www.libssh.org/" "libssh homepage")
+        set(CPACK_NSIS_MENU_LINKS "https://www.libssh.org/" "libssh homepage")
     endif (NSIS_MAKE)
 endif (WIN32)
 

ChangeLog

@@ -1,7 +1,41 @@
 ChangeLog
 ==========
 
-version 0.9.0 (released 2019-02-xx)
+version 0.9.3 (released 2019-12-10)
+  * Fixed CVE-2019-14889 - SCP: Unsanitized location leads to command execution
+  * SSH-01-003 Client: Missing NULL check leads to crash in erroneous state
+  * SSH-01-006 General: Various unchecked Null-derefs cause DOS
+  * SSH-01-007 PKI Gcrypt: Potential UAF/double free with RSA pubkeys
+  * SSH-01-010 SSH: Deprecated hash function in fingerprinting
+  * SSH-01-013 Conf-Parsing: Recursive wildcards in hostnames lead to DOS
+  * SSH-01-014 Conf-Parsing: Integer underflow leads to OOB array access
+  * SSH-01-001 State Machine: Initial machine states should be set explicitly
+  * SSH-01-002 Kex: Differently bound macros used to iterate same array
+  * SSH-01-005 Code-Quality: Integer sign confusion during assignments
+  * SSH-01-008 SCP: Protocol Injection via unescaped File Names
+  * SSH-01-009 SSH: Update documentation which RFCs are implemented
+  * SSH-01-012 PKI: Information leak via uninitialized stack buffer
+
+version 0.9.2 (released 2019-11-07)
+  * Fixed libssh-config.cmake
+  * Fixed issues with rsa algorithm negotiation (T191)
+  * Fixed detection of OpenSSL ed25519 support (T197)
+
+version 0.9.1 (released 2019-10-25)
+  * Added support for Ed25519 via OpenSSL
+  * Added support for X25519 via OpenSSL
+  * Added support for localuser in Match keyword
+  * Fixed Match keyword to be case sensitive
+  * Fixed compilation with LibreSSL
+  * Fixed error report of channel open (T75)
+  * Fixed sftp documentation (T137)
+  * Fixed known_hosts parsing (T156)
+  * Fixed build issue with MinGW (T157)
+  * Fixed build with gcc 9 (T164)
+  * Fixed deprecation issues (T165)
+  * Fixed known_hosts directory creation (T166)
+
+version 0.9.0 (released 2019-06-28)
   * Added support for AES-GCM
   * Added improved rekeying support
   * Added performance improvements
@@ -11,10 +45,76 @@ version 0.9.0 (released 2019-02-xx)
   * Added support for Encrypt-then-MAC mode
   * Added support for parsing server side configuration file
   * Added support for ECDSA/Ed25519 certificates
+  * Added FIPS 140-2 compatibility
   * Improved known_hosts parsing
   * Improved documentation
   * Improved OpenSSL API usage for KEX, DH, and signatures
 
+version 0.8.7 (released 2019-02-25)
+  * Fixed handling extension flags in the server implementation
+  * Fixed exporting ed25519 private keys
+  * Fixed corner cases for rsa-sha2 signatures
+  * Fixed some issues with connector
+
+version 0.8.6 (released 2018-12-24)
+  * Fixed compilation issues with different OpenSSL versions
+  * Fixed StrictHostKeyChecking in new knownhosts API
+  * Fixed ssh_send_keepalive() with packet filter
+  * Fixed possible crash with knownhosts options
+  * Fixed issus with rekeying
+  * Fixed strong ECDSA keys
+  * Fixed some issues with rsa-sha2 extentions
+  * Fixed access violation in ssh_init() (static linking)
+  * Fixed ssh_channel_close() handling
+
+version 0.8.5 (released 2018-10-29)
+  * Added support to get known_hosts locations with ssh_options_get()
+  * Fixed preferred algorithm for known hosts negotiations
+  * Fixed KEX with some server implementations (e.g. Cisco)
+  * Fixed issues with MSVC
+  * Fixed keyboard-interactive auth in server mode
+    (regression from CVE-2018-10933)
+  * Fixed gssapi auth in server mode (regression from CVE-2018-10933)
+  * Fixed socket fd handling with proxy command
+  * Fixed a memory leak with OpenSSL
+
+version 0.8.4 (released 2018-10-16)
+  * Fixed CVE-2018-10933
+  * Fixed building without globbing support
+  * Fixed possible memory leaks
+  * Avoid SIGPIPE on sockets
+
+version 0.8.3 (released 2018-09-21)
+  * Added support for rsa-sha2
+  * Added support to parse private keys in openssh container format
+    (other than ed25519)
+  * Added support for diffie-hellman-group18-sha512 and
+    diffie-hellman-group16-sha512
+  * Added ssh_get_fingerprint_hash()
+  * Added ssh_pki_export_privkey_base64()
+  * Added support for Match keyword in config file
+  * Improved performance and reduced memory footprint for sftp
+  * Fixed ecdsa publickey auth
+  * Fixed reading a closed channel
+  * Added support to announce posix-rename@openssh.com and
+    hardlink@openssh.com in the sftp server
+
+version 0.8.2 (released 2018-08-30)
+  * Added sha256 fingerprints for pubkeys
+  * Improved compiler flag detection
+  * Fixed race condition in reading sftp messages
+  * Fixed doxygen generation and added modern style
+  * Fixed library initialization on Windows
+  * Fixed __bounded__ attribute detection
+  * Fixed a bug in the options parser
+  * Fixed documentation for new knwon_hosts API
+
+version 0.8.1 (released 2018-08-13)
+  * Fixed version number in the header
+  * Fixed version number in pkg-config and cmake config
+  * Fixed library initialization
+  * Fixed attribute detection
+
 version 0.8.0 (released 2018-08-10)
   * Removed support for deprecated SSHv1 protocol
   * Added new connector API for clients

CompilerChecks.cmake

@@ -42,6 +42,7 @@ if (UNIX)
     add_c_compiler_flag("-Wstrict-overflow=2" SUPPORTED_COMPILER_FLAGS)
     add_c_compiler_flag("-Wno-format-zero-length" SUPPORTED_COMPILER_FLAGS)
     add_c_compiler_flag("-Wmissing-field-initializers" SUPPORTED_COMPILER_FLAGS)
+    add_c_compiler_flag("-Wsign-compare" SUPPORTED_COMPILER_FLAGS)
 
     check_c_compiler_flag("-Wformat" REQUIRED_FLAGS_WFORMAT)
     if (REQUIRED_FLAGS_WFORMAT)

ConfigureChecks.cmake

@@ -9,10 +9,7 @@ include(TestBigEndian)
 
 set(PACKAGE ${PROJECT_NAME})
 set(VERSION ${PROJECT_VERSION})
-set(DATADIR ${DATA_INSTALL_DIR})
-set(LIBDIR ${LIB_INSTALL_DIR})
-set(PLUGINDIR "${PLUGIN_INSTALL_DIR}-${LIBRARY_SOVERSION}")
-set(SYSCONFDIR ${SYSCONF_INSTALL_DIR})
+set(SYSCONFDIR ${CMAKE_INSTALL_SYSCONFDIR})
 
 set(BINARYDIR ${CMAKE_BINARY_DIR})
 set(SOURCEDIR ${CMAKE_SOURCE_DIR})
@@ -131,12 +128,37 @@ if (OPENSSL_FOUND)
     set(CMAKE_REQUIRED_LIBRARIES ${OPENSSL_CRYPTO_LIBRARY})
     check_function_exists(EVP_KDF_CTX_new_id HAVE_OPENSSL_EVP_KDF_CTX_NEW_ID)
 
+    set(CMAKE_REQUIRED_INCLUDES ${OPENSSL_INCLUDE_DIR})
+    set(CMAKE_REQUIRED_LIBRARIES ${OPENSSL_CRYPTO_LIBRARY})
+    check_function_exists(FIPS_mode HAVE_OPENSSL_FIPS_MODE)
+
     set(CMAKE_REQUIRED_INCLUDES ${OPENSSL_INCLUDE_DIR})
     set(CMAKE_REQUIRED_LIBRARIES ${OPENSSL_CRYPTO_LIBRARY})
     check_function_exists(RAND_priv_bytes HAVE_OPENSSL_RAND_PRIV_BYTES)
 
+    set(CMAKE_REQUIRED_INCLUDES ${OPENSSL_INCLUDE_DIR})
+    set(CMAKE_REQUIRED_LIBRARIES ${OPENSSL_CRYPTO_LIBRARY})
+    check_function_exists(EVP_DigestSign HAVE_OPENSSL_EVP_DIGESTSIGN)
+
+    set(CMAKE_REQUIRED_INCLUDES ${OPENSSL_INCLUDE_DIR})
+    set(CMAKE_REQUIRED_LIBRARIES ${OPENSSL_CRYPTO_LIBRARY})
+    check_function_exists(EVP_DigestVerify HAVE_OPENSSL_EVP_DIGESTVERIFY)
+
     check_function_exists(OPENSSL_ia32cap_loc HAVE_OPENSSL_IA32CAP_LOC)
 
+    set(CMAKE_REQUIRED_INCLUDES ${OPENSSL_INCLUDE_DIR})
+    set(CMAKE_REQUIRED_LIBRARIES ${OPENSSL_CRYPTO_LIBRARY})
+    check_symbol_exists(EVP_PKEY_ED25519 "openssl/evp.h" FOUND_OPENSSL_ED25519)
+
+    if (HAVE_OPENSSL_EVP_DIGESTSIGN AND HAVE_OPENSSL_EVP_DIGESTVERIFY AND
+        FOUND_OPENSSL_ED25519)
+        set(HAVE_OPENSSL_ED25519 1)
+    endif()
+
+    set(CMAKE_REQUIRED_INCLUDES ${OPENSSL_INCLUDE_DIR})
+    set(CMAKE_REQUIRED_LIBRARIES ${OPENSSL_CRYPTO_LIBRARY})
+    check_symbol_exists(EVP_PKEY_X25519 "openssl/evp.h" HAVE_OPENSSL_X25519)
+
     unset(CMAKE_REQUIRED_INCLUDES)
     unset(CMAKE_REQUIRED_LIBRARIES)
 endif()

DefineOptions.cmake

@@ -2,7 +2,6 @@ option(WITH_GSSAPI "Build with GSSAPI support" ON)
 option(WITH_ZLIB "Build with ZLIB support" ON)
 option(WITH_SFTP "Build with SFTP support" ON)
 option(WITH_SERVER "Build with SSH server support" ON)
-option(WITH_STATIC_LIB "Build with a static library" OFF)
 option(WITH_DEBUG_CRYPTO "Build with cryto debug output" OFF)
 option(WITH_DEBUG_PACKET "Build with packet debug output" OFF)
 option(WITH_DEBUG_CALLTRACE "Build with calltrace debug output" ON)
@@ -11,6 +10,7 @@ option(WITH_MBEDTLS "Compile against libmbedtls" OFF)
 option(WITH_BLOWFISH_CIPHER "Compile with blowfish support" OFF)
 option(WITH_PCAP "Compile with Pcap generation support" ON)
 option(WITH_INTERNAL_DOC "Compile doxygen internal documentation" OFF)
+option(BUILD_SHARED_LIBS "Build shared libraries" ON)
 option(UNIT_TESTING "Build with unit tests" OFF)
 option(CLIENT_TESTING "Build with client tests; requires openssh" OFF)
 option(SERVER_TESTING "Build with server tests; requires openssh and dropbear" OFF)
@@ -34,13 +34,9 @@ if (WITH_BENCHMARKS)
   set(CLIENT_TESTING ON)
 endif()
 
-if (WITH_STATIC_LIB)
-    set(BUILD_STATIC_LIB ON)
-endif (WITH_STATIC_LIB)
-
-if (UNIT_TESTING)
+if (UNIT_TESTING OR CLIENT_TESTING OR SERVER_TESTING)
   set(BUILD_STATIC_LIB ON)
-endif (UNIT_TESTING)
+endif()
 
 if (WITH_NACL)
   set(WITH_NACL ON)

INSTALL

@@ -7,11 +7,11 @@
 In order to build libssh, you need to install several components:
 
 - A C compiler
-- [CMake](http://www.cmake.org) >= 2.6.0.
-- [openssl](http://www.openssl.org) >= 0.9.8
+- [CMake](https://www.cmake.org) >= 2.6.0.
+- [openssl](https://www.openssl.org) >= 0.9.8
 or
-- [gcrypt](http://www.gnu.org/directory/Security/libgcrypt.html) >= 1.4
-- [libz](http://www.zlib.net) >= 1.2
+- [gcrypt](https://www.gnu.org/directory/Security/libgcrypt.html) >= 1.4
+- [libz](https://www.zlib.net) >= 1.2
 
 optional:
 - [cmocka](https://cmocka.org/) >= 1.1.0
@@ -117,4 +117,4 @@ This document is written using [Markdown][] syntax, making it possible to
 provide usable information in both plain text and HTML format. Whenever
 modifying this document please use [Markdown][] syntax.
 
-[markdown]: http://www.daringfireball.net/projects/markdown
+[markdown]: https://www.daringfireball.net/projects/markdown

README

@@ -31,7 +31,7 @@ If you ask yourself how to compile libssh, please read INSTALL before anything.
 3* Where ?
 -_-_-_-_-_-_
 
-http://www.libssh.org
+https://www.libssh.org
 
 4* Contributing
 -_-_-_-_-_-_-_-_-_

README.CodingStyle

@@ -60,7 +60,7 @@ following to $HOME/.vimrc:
 
 You can use the Vim gitmodline plugin to store this in the git config:
 
-    http://git.cryptomilk.org/projects/vim-gitmodeline.git/
+    https://git.cryptomilk.org/projects/vim-gitmodeline.git/
 
 For Vim, the following settings in $HOME/.vimrc will also deal with
 displaying trailing whitespace:

SubmittingPatches

@@ -23,7 +23,7 @@ much easier to work with individuals who have ownership than corporate
 legal departments if we ever need to make reasonable compromises with
 people using and working with libssh.
 
-We track the ownership of every part of libssh via http://git.libssh.org,
+We track the ownership of every part of libssh via https://git.libssh.org,
 our source code control system, so we know the provenance of every piece
 of code that is committed to libssh.
 
@@ -85,7 +85,7 @@ By making a contribution to this project, I certify that:
     Free Software Foundation; either version 2.1 of
     the License, or (at the option of the project) any later version.
 
-    http://www.gnu.org/licenses/lgpl-2.1.html
+    https://www.gnu.org/licenses/lgpl-2.1.html
 
 
 We will maintain a copy of that email as a record that you have the

cmake/Modules/DefineInstallationPaths.cmake

@@ -1,109 +0,0 @@
-if (UNIX OR OS2)
-  IF (NOT APPLICATION_NAME)
-    MESSAGE(STATUS "${PROJECT_NAME} is used as APPLICATION_NAME")
-    SET(APPLICATION_NAME ${PROJECT_NAME})
-  ENDIF (NOT APPLICATION_NAME)
-
-  # Suffix for Linux
-  SET(LIB_SUFFIX
-    CACHE STRING "Define suffix of directory name (32/64)"
-  )
-
-  SET(EXEC_INSTALL_PREFIX
-    "${CMAKE_INSTALL_PREFIX}"
-    CACHE PATH  "Base directory for executables and libraries"
-  )
-  SET(SHARE_INSTALL_PREFIX
-    "${CMAKE_INSTALL_PREFIX}/share"
-    CACHE PATH "Base directory for files which go to share/"
-  )
-  SET(DATA_INSTALL_PREFIX
-    "${SHARE_INSTALL_PREFIX}/${APPLICATION_NAME}"
-    CACHE PATH "The parent directory where applications can install their data")
-
-  # The following are directories where stuff will be installed to
-  SET(BIN_INSTALL_DIR
-    "${EXEC_INSTALL_PREFIX}/bin"
-    CACHE PATH "The ${APPLICATION_NAME} binary install dir (default prefix/bin)"
-  )
-  SET(SBIN_INSTALL_DIR
-    "${EXEC_INSTALL_PREFIX}/sbin"
-    CACHE PATH "The ${APPLICATION_NAME} sbin install dir (default prefix/sbin)"
-  )
-  SET(LIB_INSTALL_DIR
-    "${EXEC_INSTALL_PREFIX}/lib${LIB_SUFFIX}"
-    CACHE PATH "The subdirectory relative to the install prefix where libraries will be installed (default is prefix/lib)"
-  )
-  SET(LIBEXEC_INSTALL_DIR
-    "${EXEC_INSTALL_PREFIX}/libexec"
-    CACHE PATH "The subdirectory relative to the install prefix where libraries will be installed (default is prefix/libexec)"
-  )
-  SET(PLUGIN_INSTALL_DIR
-    "${LIB_INSTALL_DIR}/${APPLICATION_NAME}"
-    CACHE PATH "The subdirectory relative to the install prefix where plugins will be installed (default is prefix/lib/${APPLICATION_NAME})"
-  )
-  SET(INCLUDE_INSTALL_DIR
-    "${CMAKE_INSTALL_PREFIX}/include"
-    CACHE PATH "The subdirectory to the header prefix (default prefix/include)"
-  )
-
-  set(CMAKE_INSTALL_DIR
-    "${LIB_INSTALL_DIR}/cmake"
-    CACHE PATH "The subdirectory to install cmake config files")
-
-  SET(DATA_INSTALL_DIR
-    "${DATA_INSTALL_PREFIX}"
-    CACHE PATH "The parent directory where applications can install their data (default prefix/share/${APPLICATION_NAME})"
-  )
-  SET(HTML_INSTALL_DIR
-    "${DATA_INSTALL_PREFIX}/doc/HTML"
-    CACHE PATH "The HTML install dir for documentation (default data/doc/html)"
-  )
-  SET(ICON_INSTALL_DIR
-    "${DATA_INSTALL_PREFIX}/icons"
-    CACHE PATH "The icon install dir (default data/icons/)"
-  )
-  SET(SOUND_INSTALL_DIR
-    "${DATA_INSTALL_PREFIX}/sounds"
-    CACHE PATH "The install dir for sound files (default data/sounds)"
-  )
-
-  SET(LOCALE_INSTALL_DIR
-    "${SHARE_INSTALL_PREFIX}/locale"
-    CACHE PATH "The install dir for translations (default prefix/share/locale)"
-  )
-
-  SET(XDG_APPS_DIR
-    "${SHARE_INSTALL_PREFIX}/applications/"
-    CACHE PATH "The XDG apps dir"
-  )
-  SET(XDG_DIRECTORY_DIR
-    "${SHARE_INSTALL_PREFIX}/desktop-directories"
-    CACHE PATH "The XDG directory"
-  )
-
-  SET(SYSCONF_INSTALL_DIR
-    "${EXEC_INSTALL_PREFIX}/etc"
-    CACHE PATH "The ${APPLICATION_NAME} sysconfig install dir (default prefix/etc)"
-  )
-  SET(MAN_INSTALL_DIR
-    "${SHARE_INSTALL_PREFIX}/man"
-    CACHE PATH "The ${APPLICATION_NAME} man install dir (default prefix/man)"
-  )
-  SET(INFO_INSTALL_DIR
-    "${SHARE_INSTALL_PREFIX}/info"
-    CACHE PATH "The ${APPLICATION_NAME} info install dir (default prefix/info)"
-  )
-else()
-  # Same same
-  set(BIN_INSTALL_DIR "bin" CACHE PATH "-")
-  set(SBIN_INSTALL_DIR "sbin" CACHE PATH "-")
-  set(LIB_INSTALL_DIR "lib${LIB_SUFFIX}" CACHE PATH "-")
-  set(INCLUDE_INSTALL_DIR "include" CACHE PATH "-")
-  set(CMAKE_INSTALL_DIR "CMake" CACHE PATH "-")
-  set(PLUGIN_INSTALL_DIR "plugins" CACHE PATH "-")
-  set(HTML_INSTALL_DIR "doc/HTML" CACHE PATH "-")
-  set(ICON_INSTALL_DIR "icons" CACHE PATH "-")
-  set(SOUND_INSTALL_DIR "soudns" CACHE PATH "-")
-  set(LOCALE_INSTALL_DIR "lang" CACHE PATH "-")
-endif ()

config.h.cmake

@@ -4,10 +4,6 @@
 /* Version number of package */
 #cmakedefine VERSION "${PROJECT_VERSION}"
 
-#cmakedefine LOCALEDIR "${LOCALE_INSTALL_DIR}"
-#cmakedefine DATADIR "${DATADIR}"
-#cmakedefine LIBDIR "${LIBDIR}"
-#cmakedefine PLUGINDIR "${PLUGINDIR}"
 #cmakedefine SYSCONFDIR "${SYSCONFDIR}"
 #cmakedefine BINARYDIR "${BINARYDIR}"
 #cmakedefine SOURCEDIR "${SOURCEDIR}"
@@ -101,6 +97,12 @@
 /* Define to 1 if you have gl_flags as a glob_t sturct member */
 #cmakedefine HAVE_GLOB_GL_FLAGS_MEMBER 1
 
+/* Define to 1 if you have OpenSSL with Ed25519 support */
+#cmakedefine HAVE_OPENSSL_ED25519 1
+
+/* Define to 1 if you have OpenSSL with X25519 support */
+#cmakedefine HAVE_OPENSSL_X25519 1
+
 /*************************** FUNCTIONS ***************************/
 
 /* Define to 1 if you have the `EVP_aes128_ctr' function. */
@@ -124,6 +126,15 @@
 /* Define to 1 if you have the `EVP_KDF_CTX_new_id' function. */
 #cmakedefine HAVE_OPENSSL_EVP_KDF_CTX_NEW_ID 1
 
+/* Define to 1 if you have the `FIPS_mode' function. */
+#cmakedefine HAVE_OPENSSL_FIPS_MODE 1
+
+/* Define to 1 if you have the `EVP_DigestSign' function. */
+#cmakedefine HAVE_OPENSSL_EVP_DIGESTSIGN 1
+
+/* Define to 1 if you have the `EVP_DigestVerify' function. */
+#cmakedefine HAVE_OPENSSL_EVP_DIGESTVERIFY 1
+
 /* Define to 1 if you have the `OPENSSL_ia32cap_loc' function. */
 #cmakedefine HAVE_OPENSSL_IA32CAP_LOC 1
 

doc/curve25519-sha256@libssh.org.txt

@@ -112,8 +112,8 @@ This number is calculated using the following procedure:
      This conversion follows the network byte order. This step differs from 
      RFC5656.
 
-[RFC5656]    http://tools.ietf.org/html/rfc5656
+[RFC5656]    https://tools.ietf.org/html/rfc5656
 [SCHNEIER]   https://www.schneier.com/blog/archives/2013/09/the_nsa_is_brea.html#c1675929
-[DJB]        http://cr.yp.to/talks/2013.05.31/slides-dan+tanja-20130531-4x3.pdf
+[DJB]        https://cr.yp.to/talks/2013.05.31/slides-dan+tanja-20130531-4x3.pdf
 [Curve25519] "Curve25519: new Diffie-Hellman speed records."
-             http://cr.yp.to/ecdh/curve25519-20060209.pdf
+             https://cr.yp.to/ecdh/curve25519-20060209.pdf

doc/mainpage.dox

@@ -39,8 +39,8 @@ The libssh library provides:
 
  - Client <b>and</b> server support
  - SSHv2 and SSHv1 protocol support
- - Supports <a href="http://test.libssh.org/" target="_blank">Linux, UNIX, BSD, Solaris, OS/2 and Windows</a>
- - Automated test cases with nightly <a href="http://test.libssh.org/" target="_blank">tests</a>
+ - Supports <a href="https://test.libssh.org/" target="_blank">Linux, UNIX, BSD, Solaris, OS/2 and Windows</a>
+ - Automated test cases with nightly <a href="https://test.libssh.org/" target="_blank">tests</a>
  - Event model based on poll(2), or a poll(2)-emulation.
 
 @section main-copyright Copyright Policy
@@ -111,7 +111,7 @@ By making a contribution to this project, I certify that:
     Free Software Foundation; either version 2.1 of
     the License, or (at the option of the project) any later version.
 
-http://www.gnu.org/licenses/lgpl-2.1.html
+https://www.gnu.org/licenses/lgpl-2.1.html
 @endverbatim
 
 We will maintain a copy of that email as a record that you have the rights to
@@ -151,47 +151,79 @@ The libssh Team
 
 The following RFC documents described SSH-2 protcol as an Internet standard.
 
- - <a href="http://tools.ietf.org/html/rfc4250" target="_blank">RFC 4250</a>,
+ - <a href="https://tools.ietf.org/html/rfc4250" target="_blank">RFC 4250</a>,
     The Secure Shell (SSH) Protocol Assigned Numbers
- - <a href="http://tools.ietf.org/html/rfc4251" target="_blank">RFC 4251</a>,
+ - <a href="https://tools.ietf.org/html/rfc4251" target="_blank">RFC 4251</a>,
     The Secure Shell (SSH) Protocol Architecture
- - <a href="http://tools.ietf.org/html/rfc4252" target="_blank">RFC 4252</a>,
+ - <a href="https://tools.ietf.org/html/rfc4252" target="_blank">RFC 4252</a>,
     The Secure Shell (SSH) Authentication Protocol
- - <a href="http://tools.ietf.org/html/rfc4253" target="_blank">RFC 4253</a>,
+ - <a href="https://tools.ietf.org/html/rfc4253" target="_blank">RFC 4253</a>,
     The Secure Shell (SSH) Transport Layer Protocol
- - <a href="http://tools.ietf.org/html/rfc4254" target="_blank">RFC 4254</a>,
+ - <a href="https://tools.ietf.org/html/rfc4254" target="_blank">RFC 4254</a>,
     The Secure Shell (SSH) Connection Protocol
- - <a href="http://tools.ietf.org/html/rfc4255" target="_blank">RFC 4255</a>,
+ - <a href="https://tools.ietf.org/html/rfc4255" target="_blank">RFC 4255</a>,
     Using DNS to Securely Publish Secure Shell (SSH) Key Fingerprints
- - <a href="http://tools.ietf.org/html/rfc4256" target="_blank">RFC 4256</a>,
+    (not implemented in libssh)
+ - <a href="https://tools.ietf.org/html/rfc4256" target="_blank">RFC 4256</a>,
     Generic Message Exchange Authentication for the Secure Shell Protocol (SSH)
- - <a href="http://tools.ietf.org/html/rfc4335" target="_blank">RFC 4335</a>,
+ - <a href="https://tools.ietf.org/html/rfc4335" target="_blank">RFC 4335</a>,
     The Secure Shell (SSH) Session Channel Break Extension
- - <a href="http://tools.ietf.org/html/rfc4344" target="_blank">RFC 4344</a>,
+ - <a href="https://tools.ietf.org/html/rfc4344" target="_blank">RFC 4344</a>,
     The Secure Shell (SSH) Transport Layer Encryption Modes
- - <a href="http://tools.ietf.org/html/rfc4345" target="_blank">RFC 4345</a>,
+ - <a href="https://tools.ietf.org/html/rfc4345" target="_blank">RFC 4345</a>,
     Improved Arcfour Modes for the Secure Shell (SSH) Transport Layer Protocol
 
 It was later modified and expanded by the following RFCs.
 
- - <a href="http://tools.ietf.org/html/rfc4419" target="_blank">RFC 4419</a>,
+ - <a href="https://tools.ietf.org/html/rfc4419" target="_blank">RFC 4419</a>,
     Diffie-Hellman Group Exchange for the Secure Shell (SSH) Transport Layer
     Protocol
- - <a href="http://tools.ietf.org/html/rfc4432" target="_blank">RFC 4432</a>,
+ - <a href="https://tools.ietf.org/html/rfc4432" target="_blank">RFC 4432</a>,
     RSA Key Exchange for the Secure Shell (SSH) Transport Layer Protocol
- - <a href="http://tools.ietf.org/html/rfc4462" target="_blank">RFC 4462</a>,
+    (not implemented in libssh)
+ - <a href="https://tools.ietf.org/html/rfc4462" target="_blank">RFC 4462</a>,
     Generic Security Service Application Program Interface (GSS-API)
     Authentication and Key Exchange for the Secure Shell (SSH) Protocol
- - <a href="http://tools.ietf.org/html/rfc4716" target="_blank">RFC 4716</a>,
+    (only the authentication implemented in libssh)
+ - <a href="https://tools.ietf.org/html/rfc4716" target="_blank">RFC 4716</a>,
     The Secure Shell (SSH) Public Key File Format
- - <a href="http://tools.ietf.org/html/rfc5647" target="_blank">RFC 5647</a>,
+    (not implemented in libssh)
+ - <a href="https://tools.ietf.org/html/rfc5647" target="_blank">RFC 5647</a>,
     AES Galois Counter Mode for the Secure Shell Transport Layer Protocol
- - <a href="http://tools.ietf.org/html/rfc5656" target="_blank">RFC 5656</a>,
+    (the algorithm negotiation implemented according to openssh.com)
+ - <a href="https://tools.ietf.org/html/rfc5656" target="_blank">RFC 5656</a>,
     Elliptic Curve Algorithm Integration in the Secure Shell Transport Layer
+ - <a href="https://tools.ietf.org/html/rfc6594" target="_blank">RFC 6594</a>,
+    Use of the SHA-256 Algorithm with RSA, DSA, and ECDSA in SSHFP Resource Records
+    (not implemented in libssh)
+ - <a href="https://tools.ietf.org/html/rfc6668" target="_blank">RFC 6668</a>,
+    SHA-2 Data Integrity Verification for the Secure Shell (SSH) Transport Layer Protocol
+ - <a href="https://tools.ietf.org/html/rfc7479" target="_blank">RFC 7479</a>,
+    Using Ed25519 in SSHFP Resource Records
+    (not implemented in libssh)
+ - <a href="https://tools.ietf.org/html/rfc8160" target="_blank">RFC 8160</a>,
+    IUTF8 Terminal Mode in Secure Shell (SSH)
+    (not handled in libssh)
+ - <a href="https://tools.ietf.org/html/rfc8270" target="_blank">RFC 8270</a>,
+    Increase the Secure Shell Minimum Recommended Diffie-Hellman Modulus Size to 2048 Bits
+ - <a href="https://tools.ietf.org/html/rfc8308" target="_blank">RFC 8308</a>,
+    Extension Negotiation in the Secure Shell (SSH) Protocol
+    (only the "server-sig-algs" extension implemented)
+ - <a href="https://tools.ietf.org/html/rfc8332" target="_blank">RFC 8332</a>,
+    Use of RSA Keys with SHA-256 and SHA-512 in the Secure Shell (SSH) Protocol
+
+There are also drafts that are being currently developed and followed.
+
+ - <a href="https://tools.ietf.org/html/draft-ietf-curdle-ssh-kex-sha2-10" target="_blank">draft-ietf-curdle-ssh-kex-sha2-10</a>
+    Key Exchange (KEX) Method Updates and Recommendations for Secure Shell (SSH)
+ - <a href="https://tools.ietf.org/html/draft-miller-ssh-agent-03" target="_blank">draft-miller-ssh-agent-03</a>
+    SSH Agent Protocol
+ - <a href="https://tools.ietf.org/html/draft-ietf-curdle-ssh-curves-12" target="_blank">draft-ietf-curdle-ssh-curves-12</a>
+    Secure Shell (SSH) Key Exchange Method using Curve25519 and Curve448
 
 Interesting cryptography documents:
 
- - <a href="http://www.cryptsoft.com/pkcs11doc/" target="_blank">PKCS #11</a>, PKCS #11 reference documents, describing interface with smartcards.
+ - <a href="https://www.cryptsoft.com/pkcs11doc/" target="_blank">PKCS #11</a>, PKCS #11 reference documents, describing interface with smartcards.
 
 @subsection main-rfc-sftp Secure Shell File Transfer Protocol (SFTP)
 
@@ -199,26 +231,22 @@ The protocol is not an Internet standard but it is still widely implemented.
 OpenSSH and most other implementation implement Version 3 of the protocol. We
 do the same in libssh.
 
- - <a href="http://tools.ietf.org/html/draft-ietf-secsh-filexfer-02" target="_blank">
+ - <a href="https://tools.ietf.org/html/draft-ietf-secsh-filexfer-02" target="_blank">
    draft-ietf-secsh-filexfer-02.txt</a>,
    SSH File Transfer Protocol
 
 @subsection main-rfc-extensions Secure Shell Extensions
 
-The libssh project has an extension to support Curve25519 which is also supported by
-the OpenSSH project.
-
- - <a href="http://git.libssh.org/projects/libssh.git/tree/doc/curve25519-sha256@libssh.org.txt" target="_blank">curve25519-sha256@libssh.org</a>,
-   Curve25519-SHA256 for ECDH KEX
-
 The OpenSSH project has defined some extensions to the protocol. We support some of
 them like the statvfs calls in SFTP or the ssh-agent.
 
- - <a href="http://api.libssh.org/rfc/PROTOCOL" target="_blank">
+ - <a href="https://api.libssh.org/rfc/PROTOCOL" target="_blank">
     OpenSSH's deviations and extensions</a>
- - <a href="http://api.libssh.org/rfc/PROTOCOL.agent" target="_blank">
-    OpenSSH's ssh-agent</a>
- - <a href="http://api.libssh.org/rfc/PROTOCOL.certkeys" target="_blank">
+ - <a href="https://api.libssh.org/rfc/PROTOCOL.certkeys" target="_blank">
     OpenSSH's pubkey certificate authentication</a>
+ - <a href="https://api.libssh.org/rfc/PROTOCOL.chacha20poly1305" target="_blank">
+    chacha20-poly1305@openssh.com authenticated encryption mode</a>
+ - <a href="https://api.libssh.org/rfc/PROTOCOL.key" target="_blank">
+    OpenSSH private key format (openssh-key-v1)</a>
 
 */

examples/CMakeLists.txt

@@ -6,10 +6,7 @@ set(examples_SRCS
   connect_ssh.c
 )
 
-include_directories(
-  ${LIBSSH_PUBLIC_INCLUDE_DIRS}
-  ${CMAKE_BINARY_DIR}
-)
+include_directories(${libssh_BINARY_DIR})
 
 if (ARGP_INCLUDE_DIR)
     include_directories(${ARGP_INCLUDE_DIR})
@@ -18,68 +15,68 @@ endif()
 if (UNIX AND NOT WIN32)
     add_executable(libssh_scp libssh_scp.c ${examples_SRCS})
     target_compile_options(libssh_scp PRIVATE ${DEFAULT_C_COMPILE_FLAGS})
-    target_link_libraries(libssh_scp ${LIBSSH_SHARED_LIBRARY})
+    target_link_libraries(libssh_scp ssh::ssh)
 
     add_executable(scp_download scp_download.c ${examples_SRCS})
     target_compile_options(scp_download PRIVATE ${DEFAULT_C_COMPILE_FLAGS})
-    target_link_libraries(scp_download ${LIBSSH_SHARED_LIBRARY})
+    target_link_libraries(scp_download ssh::ssh)
 
     add_executable(sshnetcat sshnetcat.c ${examples_SRCS})
     target_compile_options(sshnetcat PRIVATE ${DEFAULT_C_COMPILE_FLAGS})
-    target_link_libraries(sshnetcat ${LIBSSH_SHARED_LIBRARY})
+    target_link_libraries(sshnetcat ssh::ssh)
 
     if (WITH_SFTP)
         add_executable(samplesftp samplesftp.c ${examples_SRCS})
         target_compile_options(samplesftp PRIVATE ${DEFAULT_C_COMPILE_FLAGS})
-        target_link_libraries(samplesftp ${LIBSSH_SHARED_LIBRARY})
+        target_link_libraries(samplesftp ssh::ssh)
     endif (WITH_SFTP)
 
     add_executable(ssh-client ssh_client.c ${examples_SRCS})
     target_compile_options(ssh-client PRIVATE ${DEFAULT_C_COMPILE_FLAGS})
-    target_link_libraries(ssh-client ${LIBSSH_SHARED_LIBRARY})
+    target_link_libraries(ssh-client ssh::ssh)
 
     if (WITH_SERVER AND (ARGP_LIBRARY OR HAVE_ARGP_H))
         if (HAVE_LIBUTIL)
             add_executable(ssh_server_fork ssh_server_fork.c)
             target_compile_options(ssh_server_fork PRIVATE ${DEFAULT_C_COMPILE_FLAGS})
-            target_link_libraries(ssh_server_fork ${LIBSSH_SHARED_LIBRARY} ${ARGP_LIBRARY} util)
+            target_link_libraries(ssh_server_fork ssh::ssh ${ARGP_LIBRARY} util)
         endif (HAVE_LIBUTIL)
 
         if (WITH_GSSAPI AND GSSAPI_FOUND)
             add_executable(samplesshd-cb samplesshd-cb.c)
             target_compile_options(samplesshd-cb PRIVATE ${DEFAULT_C_COMPILE_FLAGS})
-            target_link_libraries(samplesshd-cb ${LIBSSH_SHARED_LIBRARY} ${ARGP_LIBRARY})
+            target_link_libraries(samplesshd-cb ssh::ssh ${ARGP_LIBRARY})
 
             add_executable(proxy proxy.c)
             target_compile_options(proxy PRIVATE ${DEFAULT_C_COMPILE_FLAGS})
-            target_link_libraries(proxy ${LIBSSH_SHARED_LIBRARY} ${ARGP_LIBRARY})
+            target_link_libraries(proxy ssh::ssh ${ARGP_LIBRARY})
 
             add_executable(sshd_direct-tcpip sshd_direct-tcpip.c)
             target_compile_options(sshd_direct-tcpip PRIVATE ${DEFAULT_C_COMPILE_FLAGS})
-            target_link_libraries(sshd_direct-tcpip ${LIBSSH_SHARED_LIBRARY} ${ARGP_LIBRARY})
+            target_link_libraries(sshd_direct-tcpip ssh::ssh ${ARGP_LIBRARY})
         endif (WITH_GSSAPI AND GSSAPI_FOUND)
 
         add_executable(samplesshd-kbdint samplesshd-kbdint.c)
         target_compile_options(samplesshd-kbdint PRIVATE ${DEFAULT_C_COMPILE_FLAGS})
-        target_link_libraries(samplesshd-kbdint ${LIBSSH_SHARED_LIBRARY} ${ARGP_LIBRARY})
+        target_link_libraries(samplesshd-kbdint ssh::ssh ${ARGP_LIBRARY})
 
     endif()
 endif (UNIX AND NOT WIN32)
 
 add_executable(exec exec.c ${examples_SRCS})
 target_compile_options(exec PRIVATE ${DEFAULT_C_COMPILE_FLAGS})
-target_link_libraries(exec ${LIBSSH_SHARED_LIBRARY})
+target_link_libraries(exec ssh::ssh)
 
 add_executable(senddata senddata.c ${examples_SRCS})
 target_compile_options(senddata PRIVATE ${DEFAULT_C_COMPILE_FLAGS})
-target_link_libraries(senddata ${LIBSSH_SHARED_LIBRARY})
+target_link_libraries(senddata ssh::ssh)
 
 add_executable(keygen keygen.c)
 target_compile_options(keygen PRIVATE ${DEFAULT_C_COMPILE_FLAGS})
-target_link_libraries(keygen ${LIBSSH_SHARED_LIBRARY})
+target_link_libraries(keygen ssh::ssh)
 
 add_executable(libsshpp libsshpp.cpp)
-target_link_libraries(libsshpp ${LIBSSH_SHARED_LIBRARY})
+target_link_libraries(libsshpp ssh::ssh)
 
 add_executable(libsshpp_noexcept libsshpp_noexcept.cpp)
-target_link_libraries(libsshpp_noexcept ${LIBSSH_SHARED_LIBRARY})
+target_link_libraries(libsshpp_noexcept ssh::ssh)

examples/authentication.c

@@ -234,7 +234,7 @@ int authenticate_console(ssh_session session)
     banner = ssh_get_issue_banner(session);
     if (banner) {
         printf("%s\n",banner);
-        ssh_string_free_char(banner);
+        SSH_STRING_FREE_CHAR(banner);
     }
 
     return rc;

examples/libssh_scp.c

@@ -257,14 +257,15 @@ static int open_location(struct location *loc, int flag) {
  * @param recursive Copy also directories
  */
 static int do_copy(struct location *src, struct location *dest, int recursive) {
-    int size;
+    size_t size;
     socket_t fd;
     struct stat s;
     int w, r;
     char buffer[16384];
-    int total = 0;
-    int mode;
+    size_t total = 0;
+    mode_t mode;
     char *filename = NULL;
+
     /* recursive mode doesn't work yet */
     (void)recursive;
     /* Get the file name and size*/
@@ -302,7 +303,7 @@ static int do_copy(struct location *src, struct location *dest, int recursive) {
                 fprintf(stderr,
                         "Error: %s\n",
                         ssh_get_error(src->session));
-                ssh_string_free_char(filename);
+                SSH_STRING_FREE_CHAR(filename);
                 return -1;
             }
         } while(r != SSH_SCP_REQUEST_NEWFILE);
@@ -315,7 +316,7 @@ static int do_copy(struct location *src, struct location *dest, int recursive) {
             fprintf(stderr,
                     "error: %s\n",
                     ssh_get_error(dest->session));
-            ssh_string_free_char(filename);
+            SSH_STRING_FREE_CHAR(filename);
             ssh_scp_free(dest->scp);
             dest->scp = NULL;
             return -1;
@@ -330,7 +331,7 @@ static int do_copy(struct location *src, struct location *dest, int recursive) {
                 if (src->is_ssh) {
                     ssh_scp_deny_request(src->scp, "Cannot open local file");
                 }
-                ssh_string_free_char(filename);
+                SSH_STRING_FREE_CHAR(filename);
                 return -1;
             }
         }
@@ -346,7 +347,7 @@ static int do_copy(struct location *src, struct location *dest, int recursive) {
                 fprintf(stderr,
                         "Error reading scp: %s\n",
                         ssh_get_error(src->session));
-                ssh_string_free_char(filename);
+                SSH_STRING_FREE_CHAR(filename);
                 return -1;
             }
 
@@ -363,7 +364,7 @@ static int do_copy(struct location *src, struct location *dest, int recursive) {
                 fprintf(stderr,
                         "Error reading file: %s\n",
                         strerror(errno));
-                ssh_string_free_char(filename);
+                SSH_STRING_FREE_CHAR(filename);
                 return -1;
             }
         }
@@ -376,7 +377,7 @@ static int do_copy(struct location *src, struct location *dest, int recursive) {
                         ssh_get_error(dest->session));
                 ssh_scp_free(dest->scp);
                 dest->scp = NULL;
-                ssh_string_free_char(filename);
+                SSH_STRING_FREE_CHAR(filename);
                 return -1;
             }
         } else {
@@ -385,7 +386,7 @@ static int do_copy(struct location *src, struct location *dest, int recursive) {
                 fprintf(stderr,
                         "Error writing in local file: %s\n",
                         strerror(errno));
-                ssh_string_free_char(filename);
+                SSH_STRING_FREE_CHAR(filename);
                 return -1;
             }
         }
@@ -393,8 +394,8 @@ static int do_copy(struct location *src, struct location *dest, int recursive) {
 
     } while(total < size);
 
-    ssh_string_free_char(filename);
-    printf("wrote %d bytes\n", total);
+    SSH_STRING_FREE_CHAR(filename);
+    printf("wrote %zu bytes\n", total);
     return 0;
 }
 

examples/ssh_client.c

@@ -1,16 +1,17 @@
-/* client.c */
+/* ssh_client.c */
+
 /*
-Copyright 2003-2009 Aris Adamantiadis
-
-This file is part of the SSH Library
-
-You are free to copy this file, modify it in any way, consider it being public
-domain. This does not apply to the rest of the library though, but it is
-allowed to cut-and-paste working code from this file to any license of
-program.
-The goal is to show the API in action. It's not a reference on how terminal
-clients must be made or how a client should react.
-*/
+ * Copyright 2003-2015 Aris Adamantiadis
+ *
+ * This file is part of the SSH Library
+ *
+ * You are free to copy this file, modify it in any way, consider it being public
+ * domain. This does not apply to the rest of the library though, but it is
+ * allowed to cut-and-paste working code from this file to any license of
+ * program.
+ * The goal is to show the API in action. It's not a reference on how terminal
+ * clients must be made or how a client should react.
+ */
 
 #include "config.h"
 #include <stdio.h>
@@ -197,19 +198,20 @@ static void sizechanged(void)
 static void select_loop(ssh_session session,ssh_channel channel)
 {
     ssh_connector connector_in, connector_out, connector_err;
+    int rc;
 
     ssh_event event = ssh_event_new();
 
     /* stdin */
     connector_in = ssh_connector_new(session);
-    ssh_connector_set_out_channel(connector_in, channel, SSH_CONNECTOR_STDOUT);
+    ssh_connector_set_out_channel(connector_in, channel, SSH_CONNECTOR_STDINOUT);
     ssh_connector_set_in_fd(connector_in, 0);
     ssh_event_add_connector(event, connector_in);
 
     /* stdout */
     connector_out = ssh_connector_new(session);
     ssh_connector_set_out_fd(connector_out, 1);
-    ssh_connector_set_in_channel(connector_out, channel, SSH_CONNECTOR_STDOUT);
+    ssh_connector_set_in_channel(connector_out, channel, SSH_CONNECTOR_STDINOUT);
     ssh_event_add_connector(event, connector_out);
 
     /* stderr */
@@ -222,7 +224,11 @@ static void select_loop(ssh_session session,ssh_channel channel)
         if (signal_delayed) {
             sizechanged();
         }
-        ssh_event_dopoll(event, 60000);
+        rc = ssh_event_dopoll(event, 60000);
+        if (rc == SSH_ERROR) {
+            fprintf(stderr, "Error in ssh_event_dopoll()\n");
+            break;
+        }
     }
     ssh_event_remove_connector(event, connector_in);
     ssh_event_remove_connector(event, connector_out);
@@ -233,7 +239,6 @@ static void select_loop(ssh_session session,ssh_channel channel)
     ssh_connector_free(connector_err);
 
     ssh_event_free(event);
-    ssh_channel_free(channel);
 }
 
 static void shell(ssh_session session)
@@ -241,7 +246,11 @@ static void shell(ssh_session session)
     ssh_channel channel;
     struct termios terminal_local;
     int interactive=isatty(0);
+
     channel = ssh_channel_new(session);
+    if (channel == NULL) {
+        return;
+    }
 
     if (interactive) {
         tcgetattr(0, &terminal_local);
@@ -250,6 +259,7 @@ static void shell(ssh_session session)
 
     if (ssh_channel_open_session(channel)) {
         printf("Error opening channel : %s\n", ssh_get_error(session));
+        ssh_channel_free(channel);
         return;
     }
     chan = channel;
@@ -260,6 +270,7 @@ static void shell(ssh_session session)
 
     if (ssh_channel_request_shell(channel)) {
         printf("Requesting shell : %s\n", ssh_get_error(session));
+        ssh_channel_free(channel);
         return;
     }
 
@@ -273,6 +284,7 @@ static void shell(ssh_session session)
     if (interactive) {
         do_cleanup(0);
     }
+    ssh_channel_free(channel);
 }
 
 static void batch_shell(ssh_session session)
@@ -289,12 +301,18 @@ static void batch_shell(ssh_session session)
     }
 
     channel = ssh_channel_new(session);
+    if (channel == NULL) {
+        return;
+    }
+
     ssh_channel_open_session(channel);
     if (ssh_channel_request_exec(channel, buffer)) {
         printf("Error executing '%s' : %s\n", buffer, ssh_get_error(session));
+        ssh_channel_free(channel);
         return;
     }
     select_loop(session, channel);
+    ssh_channel_free(channel);
 }
 
 static int client(ssh_session session)

examples/ssh_server_fork.c

@@ -70,6 +70,8 @@ static void set_default_keys(ssh_bind sshbind,
         ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_ECDSAKEY,
                              KEYS_FOLDER "ssh_host_ecdsa_key");
     }
+    ssh_bind_options_set(sshbind, SSH_BIND_OPTIONS_HOSTKEY,
+                         KEYS_FOLDER "ssh_host_ed25519_key");
 }
 #define DEF_STR_SIZE 1024
 char authorizedkeys[DEF_STR_SIZE] = {0};

examples/sshd_direct-tcpip.c

@@ -23,7 +23,6 @@ clients must be made or how a client should react.
 #include <libssh/libssh.h>
 #include <libssh/server.h>
 #include <libssh/callbacks.h>
-#include <libssh/channels.h>
 
 #ifdef HAVE_ARGP_H
 #include <argp.h>
@@ -34,6 +33,20 @@ clients must be made or how a client should react.
 #include <stdio.h>
 #include <poll.h>
 
+#define SAFE_FREE(x) do { if ((x) != NULL) {free(x); x=NULL;} } while(0)
+
+#ifndef __unused__
+# ifdef HAVE_UNUSED_ATTRIBUTE
+#  define __unused__ __attribute__((unused))
+# else /* HAVE_UNUSED_ATTRIBUTE */
+#  define __unused__
+# endif /* HAVE_UNUSED_ATTRIBUTE */
+#endif /* __unused__ */
+
+#ifndef UNUSED_PARAM
+#define UNUSED_PARAM(param) param __unused__
+#endif /* UNUSED_PARAM */
+
 #ifndef KEYS_FOLDER
 #ifdef _WIN32
 #define KEYS_FOLDER
@@ -218,7 +231,9 @@ static void my_channel_close_function(ssh_session session, ssh_channel channel,
     struct event_fd_data_struct *event_fd_data = (struct event_fd_data_struct *)userdata;
     (void)session;
 
-    _ssh_log(SSH_LOG_PROTOCOL, "=== my_channel_close_function", "Channel %d:%d closed by remote. State=%d", channel->local_channel, channel->remote_channel, channel->state);
+    _ssh_log(SSH_LOG_PROTOCOL,
+             "=== my_channel_close_function",
+             "Channel closed by remote.");
 
     stack_socket_close(session, event_fd_data);
 }
@@ -227,7 +242,10 @@ static void my_channel_eof_function(ssh_session session, ssh_channel channel, vo
     struct event_fd_data_struct *event_fd_data = (struct event_fd_data_struct *)userdata;
     (void)session;
 
-    _ssh_log(SSH_LOG_PROTOCOL, "=== my_channel_eof_function", "Got EOF on channel %d:%d. Shuting down write on socket (fd = %d).", channel->local_channel, channel->remote_channel, *event_fd_data->p_fd);
+    _ssh_log(SSH_LOG_PROTOCOL,
+             "=== my_channel_eof_function",
+             "Got EOF on channel. Shuting down write on socket (fd = %d).",
+             *event_fd_data->p_fd);
 
     stack_socket_close(session, event_fd_data);
 }
@@ -236,7 +254,10 @@ static void my_channel_exit_status_function(ssh_session session, ssh_channel cha
     struct event_fd_data_struct *event_fd_data = (struct event_fd_data_struct *)userdata;
     (void)session;
 
-    _ssh_log(SSH_LOG_PROTOCOL, "=== my_channel_exit_status_function", "Got exit status %d on channel %d:%d fd = %d.", exit_status, channel->local_channel, channel->remote_channel, *event_fd_data->p_fd);
+    _ssh_log(SSH_LOG_PROTOCOL,
+             "=== my_channel_exit_status_function",
+             "Got exit status %d on channel fd = %d.",
+             exit_status, *event_fd_data->p_fd);
 }
 
 static int my_channel_data_function(ssh_session session,
@@ -253,7 +274,11 @@ static int my_channel_data_function(ssh_session session,
         fprintf(stderr, "Why we're here? Stacked = %d\n", event_fd_data->stacked);
     }
 
-    _ssh_log(SSH_LOG_PROTOCOL, "=== my_channel_data_function", "%d bytes waiting on channel %d:%d for reading. Fd = %d",len, channel->local_channel, channel->remote_channel, *event_fd_data->p_fd);
+    _ssh_log(SSH_LOG_PROTOCOL,
+             "=== my_channel_data_function",
+             "%d bytes waiting on channel for reading. Fd = %d",
+             len,
+             *event_fd_data->p_fd);
     if (len > 0) {
         i = send(*event_fd_data->p_fd, data, len, 0);
     }
@@ -313,8 +338,10 @@ static int my_fd_data_function(UNUSED_PARAM(socket_t fd),
     blocking = ssh_is_blocking(session);
     ssh_set_blocking(session, 0);
 
-    _ssh_log(SSH_LOG_FUNCTIONS, "=== my_fd_data_function", "Trying to read from tcp socket fd = %d... (Channel %d:%d state=%d)",
-                        *event_fd_data->p_fd, channel->local_channel, channel->remote_channel, channel->state);
+    _ssh_log(SSH_LOG_FUNCTIONS,
+             "=== my_fd_data_function",
+             "Trying to read from tcp socket fd = %d",
+             *event_fd_data->p_fd);
 #ifdef _WIN32
     struct sockaddr from;
     int fromlen = sizeof(from);

include/libssh/CMakeLists.txt

@@ -26,7 +26,7 @@ install(
   FILES
     ${libssh_HDRS}
   DESTINATION
-    ${INCLUDE_INSTALL_DIR}/${APPLICATION_NAME}
+    ${CMAKE_INSTALL_INCLUDEDIR}/${APPLICATION_NAME}
   COMPONENT
     headers
 )

include/libssh/agent.h

@@ -104,7 +104,7 @@ void ssh_agent_free(struct ssh_agent_struct *agent);
  */
 int ssh_agent_is_running(struct ssh_session_struct *session);
 
-int ssh_agent_get_ident_count(struct ssh_session_struct *session);
+uint32_t ssh_agent_get_ident_count(struct ssh_session_struct *session);
 
 ssh_key ssh_agent_get_next_ident(struct ssh_session_struct *session,
                                  char **comment);

include/libssh/bignum.h

@@ -27,7 +27,7 @@
 
 bignum ssh_make_string_bn(ssh_string string);
 ssh_string ssh_make_bignum_string(bignum num);
-void ssh_print_bignum(const char *which, const bignum num);
+void ssh_print_bignum(const char *which, const_bignum num);
 
 
 #endif /* BIGNUM_H_ */

include/libssh/bind.h

@@ -22,6 +22,7 @@
 #define BIND_H_
 
 #include "libssh/priv.h"
+#include "libssh/kex.h"
 #include "libssh/session.h"
 
 struct ssh_bind_struct {
@@ -31,7 +32,7 @@ struct ssh_bind_struct {
 
   struct ssh_poll_handle_struct *poll;
   /* options */
-  char *wanted_methods[10];
+  char *wanted_methods[SSH_KEX_METHODS];
   char *banner;
   char *ecdsakey;
   char *dsakey;

include/libssh/channels.h

@@ -97,8 +97,9 @@ SSH_PACKET_CALLBACK(channel_rcv_close);
 SSH_PACKET_CALLBACK(channel_rcv_request);
 SSH_PACKET_CALLBACK(channel_rcv_data);
 
-int channel_default_bufferize(ssh_channel channel, void *data, int len,
-        int is_stderr);
+int channel_default_bufferize(ssh_channel channel,
+                              void *data, size_t len,
+                              bool is_stderr);
 int ssh_channel_flush(ssh_channel channel);
 uint32_t ssh_channel_new_id(ssh_session session);
 ssh_channel ssh_channel_from_local(ssh_session session, uint32_t id);

include/libssh/crypto.h

@@ -105,7 +105,7 @@ struct ssh_crypto_struct {
     bignum shared_secret;
     struct dh_ctx *dh_ctx;
 #ifdef WITH_GEX
-    size_t dh_pmin; int dh_pn; int dh_pmax; /* preferred group parameters */
+    size_t dh_pmin; size_t dh_pn; size_t dh_pmax; /* preferred group parameters */
 #endif /* WITH_GEX */
 #ifdef HAVE_ECDH
 #ifdef HAVE_OPENSSL_ECC

include/libssh/dh.h

@@ -48,6 +48,8 @@ int ssh_dh_keypair_set_keys(struct dh_ctx *ctx, int peer,
 int ssh_dh_compute_shared_secret(struct dh_ctx *ctx, int local, int remote,
                                  bignum *dest);
 
+void ssh_dh_debug_crypto(struct ssh_crypto_struct *c);
+
 /* common functions */
 int ssh_dh_init(void);
 void ssh_dh_finalize(void);

include/libssh/fe25519.h

@@ -39,7 +39,7 @@ void fe25519_unpack(fe25519 *r, const unsigned char x[32]);
 
 void fe25519_pack(unsigned char r[32], const fe25519 *x);
 
-int fe25519_iszero(const fe25519 *x);
+uint32_t fe25519_iszero(const fe25519 *x);
 
 int fe25519_iseq_vartime(const fe25519 *x, const fe25519 *y);
 

include/libssh/knownhosts.h

@@ -23,6 +23,7 @@
 #define SSH_KNOWNHOSTS_H_
 
 struct ssh_list *ssh_known_hosts_get_algorithms(ssh_session session);
+char *ssh_known_hosts_get_algorithms_names(ssh_session session);
 enum ssh_known_hosts_e
 ssh_session_get_known_hosts_entry_file(ssh_session session,
                                        const char *filename,

include/libssh/libcrypto.h

@@ -96,9 +96,9 @@ typedef BN_CTX* bignum_CTX;
 #define bignum_add(dest, a, b) BN_add(dest, a, b)
 #define bignum_sub(dest, a, b) BN_sub(dest, a, b)
 #define bignum_mod(dest, a, b, ctx) BN_mod(dest, a, b, ctx)
-#define bignum_num_bytes(num) BN_num_bytes(num)
-#define bignum_num_bits(num) BN_num_bits(num)
-#define bignum_is_bit_set(num,bit) BN_is_bit_set(num,bit)
+#define bignum_num_bytes(num) (size_t)BN_num_bytes(num)
+#define bignum_num_bits(num) (size_t)BN_num_bits(num)
+#define bignum_is_bit_set(num,bit) BN_is_bit_set(num, (int)bit)
 #define bignum_bn2bin(num,len, ptr) BN_bn2bin(num, ptr)
 #define bignum_cmp(num1,num2) BN_cmp(num1,num2)
 #define bignum_rshift1(dest, src) BN_rshift1(dest, src)
@@ -112,7 +112,11 @@ typedef BN_CTX* bignum_CTX;
 
 
 /* Returns true if the OpenSSL is operating in FIPS mode */
+#ifdef HAVE_OPENSSL_FIPS_MODE
 #define ssh_fips_mode() (FIPS_mode() != 0)
+#else
+#define ssh_fips_mode() false
+#endif
 
 #endif /* HAVE_LIBCRYPTO */
 

include/libssh/libgcrypt.h

@@ -78,7 +78,10 @@ int ssh_gcry_rand_range(bignum rnd, bignum max);
 #define bignum_bin2bn(data,datalen,dest) gcry_mpi_scan(dest,GCRYMPI_FMT_USG,data,datalen,NULL)
 #define bignum_bn2dec(num) ssh_gcry_bn2dec(num)
 #define bignum_dec2bn(num, data) ssh_gcry_dec2bn(data, num)
-#define bignum_bn2hex(num,data) gcry_mpi_aprint(GCRYMPI_FMT_HEX,data,NULL,num)
+
+#define bignum_bn2hex(num, data) \
+    gcry_mpi_aprint(GCRYMPI_FMT_HEX, data, NULL, (const gcry_mpi_t)num)
+
 #define bignum_hex2bn(data, num) (gcry_mpi_scan(num,GCRYMPI_FMT_HEX,data,0,NULL)==0?1:0)
 #define bignum_rand(num,bits) 1,gcry_mpi_randomize(num,bits,GCRY_STRONG_RANDOM),gcry_mpi_set_bit(num,bits-1),gcry_mpi_set_bit(num,0)
 #define bignum_mod_exp(dest,generator,exp,modulo, ctx) 1,gcry_mpi_powm(dest,generator,exp,modulo)

include/libssh/libmbedcrypto.h

@@ -75,7 +75,7 @@ struct mbedtls_ecdsa_sig {
 
 bignum ssh_mbedcry_bn_new(void);
 void ssh_mbedcry_bn_free(bignum num);
-unsigned char *ssh_mbedcry_bn2num(bignum num, int radix);
+unsigned char *ssh_mbedcry_bn2num(const_bignum num, int radix);
 int ssh_mbedcry_rand(bignum rnd, int bits, int top, int bottom);
 int ssh_mbedcry_is_bit_set(bignum num, size_t pos);
 int ssh_mbedcry_rand_range(bignum dest, bignum max);

include/libssh/libssh.h

@@ -78,8 +78,8 @@
 
 /* libssh version */
 #define LIBSSH_VERSION_MAJOR  0
-#define LIBSSH_VERSION_MINOR  8
-#define LIBSSH_VERSION_MICRO  90
+#define LIBSSH_VERSION_MINOR  9
+#define LIBSSH_VERSION_MICRO  3
 
 #define LIBSSH_VERSION_INT SSH_VERSION_INT(LIBSSH_VERSION_MAJOR, \
                                            LIBSSH_VERSION_MINOR, \
@@ -168,13 +168,13 @@ enum ssh_auth_e {
 };
 
 /* auth flags */
-#define SSH_AUTH_METHOD_UNKNOWN 0
-#define SSH_AUTH_METHOD_NONE 0x0001
-#define SSH_AUTH_METHOD_PASSWORD 0x0002
-#define SSH_AUTH_METHOD_PUBLICKEY 0x0004
-#define SSH_AUTH_METHOD_HOSTBASED 0x0008
-#define SSH_AUTH_METHOD_INTERACTIVE 0x0010
-#define SSH_AUTH_METHOD_GSSAPI_MIC 0x0020
+#define SSH_AUTH_METHOD_UNKNOWN     0x0000u
+#define SSH_AUTH_METHOD_NONE        0x0001u
+#define SSH_AUTH_METHOD_PASSWORD    0x0002u
+#define SSH_AUTH_METHOD_PUBLICKEY   0x0004u
+#define SSH_AUTH_METHOD_HOSTBASED   0x0008u
+#define SSH_AUTH_METHOD_INTERACTIVE 0x0010u
+#define SSH_AUTH_METHOD_GSSAPI_MIC  0x0020u
 
 /* messages */
 enum ssh_requests_e {
@@ -441,6 +441,7 @@ enum ssh_scp_request_types {
 enum ssh_connector_flags_e {
     /** Only the standard stream of the channel */
     SSH_CONNECTOR_STDOUT = 1,
+    SSH_CONNECTOR_STDINOUT = 1,
     /** Only the exception stream of the channel */
     SSH_CONNECTOR_STDERR = 2,
     /** Merge both standard and exception streams */

include/libssh/messages.h

@@ -28,7 +28,7 @@ struct ssh_auth_request {
     int method;
     char *password;
     struct ssh_key_struct *pubkey;
-    char signature_state;
+    enum ssh_publickey_state_e signature_state;
     char kbdint_response;
 };
 

include/libssh/misc.h

@@ -26,6 +26,7 @@
 char *ssh_get_user_home_dir(void);
 char *ssh_get_local_username(void);
 int ssh_file_readaccess_ok(const char *file);
+int ssh_dir_writeable(const char *path);
 
 char *ssh_path_expand_tilde(const char *d);
 char *ssh_path_expand_escape(ssh_session session, const char *s);
@@ -50,6 +51,12 @@ struct ssh_timestamp {
   long useconds;
 };
 
+enum ssh_quote_state_e {
+    NO_QUOTE,
+    SINGLE_QUOTE,
+    DOUBLE_QUOTE
+};
+
 struct ssh_list *ssh_list_new(void);
 void ssh_list_free(struct ssh_list *list);
 struct ssh_iterator *ssh_list_get_iterator(const struct ssh_list *list);
@@ -83,4 +90,11 @@ int ssh_match_group(const char *group, const char *object);
 
 void uint64_inc(unsigned char *counter);
 
+void ssh_log_hexdump(const char *descr, const unsigned char *what, size_t len);
+
+int ssh_mkdirs(const char *pathname, mode_t mode);
+
+int ssh_quote_file_name(const char *file_name, char *buf, size_t buf_len);
+int ssh_newline_vis(const char *string, char *buf, size_t buf_len);
+
 #endif /* MISC_H_ */

include/libssh/pki.h

@@ -30,7 +30,15 @@
 #endif
 
 #include "libssh/crypto.h"
+#ifdef HAVE_OPENSSL_ED25519
+/* If using OpenSSL implementation, define the signature lenght which would be
+ * defined in libssh/ed25519.h otherwise */
+#define ED25519_SIG_LEN 64
+#else
 #include "libssh/ed25519.h"
+#endif
+/* This definition is used for both OpenSSL and internal implementations */
+#define ED25519_KEY_LEN 32
 
 #define MAX_PUBKEY_SIZE 0x100000 /* 1M */
 #define MAX_PRIVKEY_SIZE 0x400000 /* 4M */
@@ -61,8 +69,13 @@ struct ssh_key_struct {
     void *ecdsa;
 # endif /* HAVE_OPENSSL_EC_H */
 #endif /* HAVE_LIBGCRYPT */
+#ifdef HAVE_OPENSSL_ED25519
+    uint8_t *ed25519_pubkey;
+    uint8_t *ed25519_privkey;
+#else
     ed25519_pubkey *ed25519_pubkey;
     ed25519_privkey *ed25519_privkey;
+#endif
     void *cert;
     enum ssh_keytypes_e cert_type;
 };
@@ -79,7 +92,9 @@ struct ssh_signature_struct {
     ssh_string rsa_sig;
     struct mbedtls_ecdsa_sig ecdsa_sig;
 #endif /* HAVE_LIBGCRYPT */
+#ifndef HAVE_OPENSSL_ED25519
     ed25519_signature *ed25519_sig;
+#endif
     ssh_string raw_sig;
 };
 
@@ -96,6 +111,7 @@ enum ssh_keytypes_e ssh_key_type_from_signature_name(const char *name);
 enum ssh_keytypes_e ssh_key_type_plain(enum ssh_keytypes_e type);
 enum ssh_digest_e ssh_key_type_to_hash(ssh_session session,
                                        enum ssh_keytypes_e type);
+enum ssh_digest_e ssh_key_hash_from_name(const char *name);
 
 #define is_ecdsa_key_type(t) \
     ((t) >= SSH_KEYTYPE_ECDSA_P256 && (t) <= SSH_KEYTYPE_ECDSA_P521)
@@ -118,7 +134,7 @@ int ssh_pki_import_signature_blob(const ssh_string sig_blob,
 int ssh_pki_signature_verify(ssh_session session,
                              ssh_signature sig,
                              const ssh_key key,
-                             unsigned char *digest,
+                             const unsigned char *digest,
                              size_t dlen);
 
 /* SSH Public Key Functions */
@@ -138,7 +154,8 @@ ssh_string ssh_pki_do_sign_agent(ssh_session session,
                                  struct ssh_buffer_struct *buf,
                                  const ssh_key pubkey);
 ssh_string ssh_srv_pki_do_sign_sessionid(ssh_session session,
-                                         const ssh_key privkey);
+                                         const ssh_key privkey,
+                                         const enum ssh_digest_e digest);
 
 /* Temporary functions, to be removed after migration to ssh_key */
 ssh_public_key ssh_pki_convert_key_to_publickey(const ssh_key key);

include/libssh/pki_priv.h

@@ -124,11 +124,6 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
                                       const ssh_string sig_blob,
                                       enum ssh_keytypes_e type,
                                       enum ssh_digest_e hash_type);
-int pki_signature_verify(ssh_session session,
-                         const ssh_signature sig,
-                         const ssh_key key,
-                         const unsigned char *input,
-                         size_t input_len);
 
 /* SSH Signing Functions */
 ssh_signature pki_do_sign(const ssh_key privkey,
@@ -148,8 +143,8 @@ int pki_ed25519_key_cmp(const ssh_key k1,
                 enum ssh_keycmp_e what);
 int pki_ed25519_key_dup(ssh_key new, const ssh_key key);
 int pki_ed25519_public_key_to_blob(ssh_buffer buffer, ssh_key key);
-ssh_string pki_ed25519_sig_to_blob(ssh_signature sig);
-int pki_ed25519_sig_from_blob(ssh_signature sig, ssh_string sig_blob);
+ssh_string pki_ed25519_signature_to_blob(ssh_signature sig);
+int pki_signature_from_ed25519_blob(ssh_signature sig, ssh_string sig_blob);
 int pki_privkey_build_ed25519(ssh_key key,
                               ssh_string pubkey,
                               ssh_string privkey);

include/libssh/priv.h

@@ -221,7 +221,17 @@ int gettimeofday(struct timeval *__p, void *__t);
 struct ssh_common_struct;
 struct ssh_kex_struct;
 
-int ssh_get_key_params(ssh_session session, ssh_key *privkey);
+enum ssh_digest_e {
+    SSH_DIGEST_AUTO=0,
+    SSH_DIGEST_SHA1=1,
+    SSH_DIGEST_SHA256,
+    SSH_DIGEST_SHA384,
+    SSH_DIGEST_SHA512,
+};
+
+int ssh_get_key_params(ssh_session session,
+                       ssh_key *privkey,
+                       enum ssh_digest_e *digest);
 
 /* LOGGING */
 void ssh_log_function(int verbosity,
@@ -272,14 +282,12 @@ int ssh_auth_reply_success(ssh_session session, int partial);
 int ssh_send_banner(ssh_session session, int is_server);
 
 /* connect.c */
-socket_t ssh_connect_host(ssh_session session, const char *host,const char
-        *bind_addr, int port, long timeout, long usec);
 socket_t ssh_connect_host_nonblocking(ssh_session session, const char *host,
 		const char *bind_addr, int port);
 
 /* in base64.c */
 ssh_buffer base64_to_bin(const char *source);
-unsigned char *bin_to_base64(const unsigned char *source, int len);
+uint8_t *bin_to_base64(const uint8_t *source, size_t len);
 
 /* gzip.c */
 int compress_buffer(ssh_session session,ssh_buffer buf);

include/libssh/session.h

@@ -145,7 +145,7 @@ struct ssh_session_struct {
     /* where it was before being interrupted */
     enum ssh_pending_call_e pending_call_state;
     enum ssh_session_state_e session_state;
-    int packet_state;
+    enum ssh_packet_state_e packet_state;
     enum ssh_dh_state_e dh_handshake_state;
     enum ssh_channel_request_state_e global_req_state;
     struct ssh_agent_state_struct *agent_state;
@@ -188,6 +188,7 @@ struct ssh_session_struct {
         ssh_key ed25519_key;
         /* The type of host key wanted by client */
         enum ssh_keytypes_e hostkey;
+        enum ssh_digest_e hostkey_digest;
     } srv;
 
     /* auths accepted by server */
@@ -212,7 +213,7 @@ struct ssh_session_struct {
         char *sshdir;
         char *knownhosts;
         char *global_knownhosts;
-        char *wanted_methods[10];
+        char *wanted_methods[SSH_KEX_METHODS];
         char *pubkey_accepted_types;
         char *ProxyCommand;
         char *custombanner;

include/libssh/sftp.h

@@ -201,13 +201,18 @@ struct sftp_statvfs_struct {
 };
 
 /**
- * @brief Start a new sftp session.
+ * @brief Creates a new sftp session.
+ *
+ * This function creates a new sftp session and allocates a new sftp channel
+ * with the server inside of the provided ssh session. This function call is
+ * usually followed by the sftp_init(), which initializes SFTP protocol itself.
  *
  * @param session       The ssh session to use.
  *
  * @return              A new sftp session or NULL on error.
  *
  * @see sftp_free()
+ * @see sftp_init()
  */
 LIBSSH_API sftp_session sftp_new(ssh_session session);
 
@@ -232,7 +237,10 @@ LIBSSH_API sftp_session sftp_new_channel(ssh_session session, ssh_channel channe
 LIBSSH_API void sftp_free(sftp_session sftp);
 
 /**
- * @brief Initialize the sftp session with the server.
+ * @brief Initialize the sftp protocol with the server.
+ *
+ * This function involves the SFTP protocol initialization (as described
+ * in the SFTP specification), including the version and extensions negotiation.
  *
  * @param sftp          The sftp session to initialize.
  *
@@ -862,13 +870,6 @@ LIBSSH_API int sftp_server_init(sftp_session sftp);
 LIBSSH_API void sftp_server_free(sftp_session sftp);
 #endif  /* WITH_SERVER */
 
-/* this is not a public interface */
-#define SFTP_HANDLES 256
-sftp_packet sftp_packet_read(sftp_session sftp);
-int sftp_packet_write(sftp_session sftp,uint8_t type, ssh_buffer payload);
-void sftp_packet_free(sftp_packet packet);
-int buffer_add_attributes(ssh_buffer buffer, sftp_attributes attr);
-sftp_attributes sftp_parse_attr(sftp_session session, ssh_buffer buf,int expectname);
 /* sftpserver.c */
 
 LIBSSH_API sftp_client_message sftp_get_client_message(sftp_session sftp);

include/libssh/sftp_priv.h

@@ -0,0 +1,32 @@
+/*
+ * This file is part of the SSH Library
+ *
+ * Copyright (c) 2003-2008 by Aris Adamantiadis
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef SFTP_PRIV_H
+#define SFTP_PRIV_H
+
+sftp_packet sftp_packet_read(sftp_session sftp);
+ssize_t sftp_packet_write(sftp_session sftp, uint8_t type, ssh_buffer payload);
+void sftp_packet_free(sftp_packet packet);
+int buffer_add_attributes(ssh_buffer buffer, sftp_attributes attr);
+sftp_attributes sftp_parse_attr(sftp_session session,
+                                ssh_buffer buf,
+                                int expectname);
+
+#endif /* SFTP_PRIV_H */

include/libssh/socket.h

@@ -63,6 +63,9 @@ void ssh_socket_set_callbacks(ssh_socket s, ssh_socket_callbacks callbacks);
 int ssh_socket_pollcallback(struct ssh_poll_handle_struct *p, socket_t fd, int revents, void *v_s);
 struct ssh_poll_handle_struct * ssh_socket_get_poll_handle(ssh_socket s);
 
-int ssh_socket_connect(ssh_socket s, const char *host, int port, const char *bind_addr);
+int ssh_socket_connect(ssh_socket s,
+                       const char *host,
+                       uint16_t port,
+                       const char *bind_addr);
 
 #endif /* SOCKET_H_ */

include/libssh/token.h

@@ -38,7 +38,11 @@ void ssh_tokens_free(struct ssh_tokens_st *tokens);
 char *ssh_find_matching(const char *available_d,
                         const char *preferred_d);
 
-
 char *ssh_find_all_matching(const char *available_d,
                             const char *preferred_d);
+
+char *ssh_remove_duplicates(const char *list);
+
+char *ssh_append_without_duplicates(const char *list,
+                                    const char *appended_list);
 #endif /* TOKEN_H_ */

include/libssh/wrapper.h

@@ -29,14 +29,6 @@
 #include "libssh/libgcrypt.h"
 #include "libssh/libmbedcrypto.h"
 
-enum ssh_digest_e {
-    SSH_DIGEST_AUTO=0,
-    SSH_DIGEST_SHA1=1,
-    SSH_DIGEST_SHA256,
-    SSH_DIGEST_SHA384,
-    SSH_DIGEST_SHA512,
-};
-
 enum ssh_kdf_digest {
     SSH_KDF_SHA1=1,
     SSH_KDF_SHA256,

libssh-config.cmake.in

@@ -1,15 +0,0 @@
-@PACKAGE_INIT@
-
-if (EXISTS "${CMAKE_CURRENT_LIST_DIR}/CMakeCache.txt")
-    # In tree build
-    set_and_check(LIBSSH_INCLUDE_DIR "${CMAKE_CURRENT_LIST_DIR}/include")
-    set_and_check(LIBSSH_LIBRARIES "${CMAKE_CURRENT_LIST_DIR}/lib/@LIBSSH_LIBRARY_NAME@")
-else()
-    set_and_check(LIBSSH_INCLUDE_DIR "@PACKAGE_INCLUDE_INSTALL_DIR@")
-    set_and_check(LIBSSH_LIBRARIES "@PACKAGE_LIB_INSTALL_DIR@/@LIBSSH_LIBRARY_NAME@")
-endif()
-
-# For backward compatibility
-set(LIBSSH_LIBRARY ${LIBSSH_LIBRARIES})
-
-mark_as_advanced(LIBSSH_LIBRARIES LIBSSH_LIBRARY LIBSSH_INCLUDE_DIR)

libssh.pc.cmake

@@ -1,6 +1,6 @@
 Name: ${PROJECT_NAME}
 Description: The SSH Library
 Version: ${PROJECT_VERSION}
-Libs: -L${LIB_INSTALL_DIR} -lssh
-Cflags: -I${INCLUDE_INSTALL_DIR}
+Libs: -L${CMAKE_INSTALL_FULL_LIBDIR} -lssh
+Cflags: -I${CMAKE_INSTALL_FULL_INCLUDEDIR}
 

obj/build_make.sh

@@ -1,200 +0,0 @@
-#!/bin/bash
-#
-# Last Change: 2008-06-18 14:13:46
-#
-# Script to build libssh on UNIX.
-#
-# Copyright (c) 2006-2007 Andreas Schneider <asn@cryptomilk.org>
-#
-
-SOURCE_DIR=".."
-
-LANG=C
-export LANG
-
-SCRIPT="$0"
-COUNT=0
-while [ -L "${SCRIPT}" ]
-do
-	SCRIPT=$(readlink ${SCRIPT})
-	COUNT=$(expr ${COUNT} + 1)
-	if [ ${COUNT} -gt 100 ]; then
-		echo "Too many symbolic links"
-		exit 1
-	fi
-done
-BUILDDIR=$(dirname ${SCRIPT})
-
-cleanup_and_exit () {
-	if test "$1" = 0 -o -z "$1" ; then
-		exit 0
-	else
-		exit $1
-	fi
-}
-
-function configure() {
-	if [ -n "${CMAKEDIR}" ]; then
-		${CMAKEDIR}/bin/cmake "$@" ${SOURCE_DIR} || cleanup_and_exit $?
-	else
-		cmake "$@" ${SOURCE_DIR} || cleanup_and_exit $?
-	fi
-}
-
-function compile() {
-	if [ -f /proc/cpuinfo ]; then
-		CPUCOUNT=$(grep -c processor /proc/cpuinfo)
-	elif test `uname` = "SunOS" ; then
-		CPUCOUNT=$(psrinfo -p)
-	else
-		CPUCOUNT="1"
-	fi
-
-	if [ "${CPUCOUNT}" -gt "1" ]; then
-		${MAKE} -j${CPUCOUNT} $1 || cleanup_and_exit $?
-	else
-		${MAKE} $1 || exit $?
-	fi
-}
-
-function clean_build_dir() {
-	find ! -path "*.svn*" ! -name "*.bat" ! -name "*.sh" ! -name "." -print0 | xargs -0 rm -rf
-}
-
-function usage () {
-echo "Usage: `basename $0` [--prefix /install_prefix|--build [debug|final]|--clean|--verbose|--libsuffix (32|64)|--help|--clang|--cmakedir /directory|--make
-(gmake|make)|--ccompiler(gcc|cc)|--withstaticlib|--unittesting|--clientunittesting|--withserver|--withoutsymbolversioning]"
-    cleanup_and_exit
-}
-
-cd ${BUILDDIR}
-
-# the default CMake options:
-OPTIONS="--graphviz=${BUILDDIR}/libssh.dot"
-
-# the default 'make' utility:
-MAKE="make"
-
-while test -n "$1"; do
-	PARAM="$1"
-	ARG="$2"
-	shift
-	case ${PARAM} in
-		*-*=*)
-		ARG=${PARAM#*=}
-		PARAM=${PARAM%%=*}
-		set -- "----noarg=${PARAM}" "$@"
-	esac
-	case ${PARAM} in
-		*-help|-h)
-			#echo_help
-			usage
-			cleanup_and_exit
-		;;
-		*-build)
-			DOMAKE="1"
-			BUILD_TYPE="${ARG}"
-			test -n "${BUILD_TYPE}" && shift
-		;;
-		*-clean)
-			clean_build_dir
-			cleanup_and_exit
-		;;
-		*-clang)
-			OPTIONS="${OPTIONS} -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++"
-		;;
-		*-verbose)
-			DOVERBOSE="1"
-		;;
-		*-memtest)
-			OPTIONS="${OPTIONS} -DMEM_NULL_TESTS=ON"
-		;;
-		*-libsuffix)
-			OPTIONS="${OPTIONS} -DLIB_SUFFIX=${ARG}"
-			shift
-		;;
-		*-prefix)
-			OPTIONS="${OPTIONS} -DCMAKE_INSTALL_PREFIX=${ARG}"
-			shift
-		;;
-		*-sysconfdir)
-			OPTIONS="${OPTIONS} -DSYSCONF_INSTALL_DIR=${ARG}"
-			shift
-		;;
-		*-cmakedir)
-			CMAKEDIR="${ARG}"
-			shift
-		;;
-		*-make)
-			MAKE="${ARG}"
-			shift
-		;;
-		*-ccompiler)
-			OPTIONS="${OPTIONS} -DCMAKE_C_COMPILER=${ARG}"
-			shift
-		;;
-		*-withstaticlib)
-			OPTIONS="${OPTIONS} -DWITH_STATIC_LIB=ON"
-		;;
-		*-unittesting)
-			OPTIONS="${OPTIONS} -DUNIT_TESTING=ON"
-		;;
-		*-clientunittesting)
-			OPTIONS="${OPTIONS} -DCLIENT_TESTING=ON"
-		;;
-		*-withserver)
-			OPTIONS="${OPTIONS} -DWITH_SERVER=ON"
-		;;
-		*-withoutsymbolversioning)
-			OPTIONS="${OPTIONS} -DWITH_SYMBOL_VERSIONING=OFF"
-		;;
-		*-finalrelease)
-			OPTIONS="${OPTIONS} -DWITH_FINAL=ON"
-		;;
-		----noarg)
-			echo "$ARG does not take an argument"
-			cleanup_and_exit
-		;;
-		-*)
-			echo Unknown Option "$PARAM". Exit.
-			cleanup_and_exit 1
-		;;
-		*)
-			usage
-		;;
-	esac
-done
-
-if [ "${DOMAKE}" == "1" ]; then
-	OPTIONS="${OPTIONS} -DCMAKE_BUILD_TYPE=${BUILD_TYPE}"
-fi
-
-if [ -n "${DOVERBOSE}" ]; then
-	OPTIONS="${OPTIONS} -DCMAKE_VERBOSE_MAKEFILE=1"
-else
-	OPTIONS="${OPTIONS} -DCMAKE_VERBOSE_MAKEFILE=0"
-fi
-
-test -f "${BUILDDIR}/.build.log" && rm -f ${BUILDDIR}/.build.log
-touch ${BUILDDIR}/.build.log
-# log everything from here to .build.log
-exec 1> >(exec -a 'build logging tee' tee -a ${BUILDDIR}/.build.log) 2>&1
-echo "${HOST} started build at $(date)."
-echo
-
-configure ${OPTIONS} "$@"
-
-if [ -n "${DOMAKE}" ]; then
-	test -n "${DOVERBOSE}" && compile VERBOSE=1 || compile
-fi
-
-DOT=$(which dot 2>/dev/null)
-if [ -n "${DOT}" ]; then
-	${DOT} -Tpng -o${BUILDDIR}/libssh.png ${BUILDDIR}/libssh.dot
-	${DOT} -Tsvg -o${BUILDDIR}/libssh.svg ${BUILDDIR}/libssh.dot
-fi
-
-exec >&0 2>&0		# so that the logging tee finishes
-sleep 1			# wait till tee terminates
-
-cleanup_and_exit 0

src/ABI/current

@@ -1 +1 @@
-4.8.1
+4.8.4

src/ABI/libssh-4.8.2.symbols

@@ -0,0 +1,421 @@
+_ssh_log
+buffer_free
+buffer_get
+buffer_get_len
+buffer_new
+channel_accept_x11
+channel_change_pty_size
+channel_close
+channel_forward_accept
+channel_forward_cancel
+channel_forward_listen
+channel_free
+channel_get_exit_status
+channel_get_session
+channel_is_closed
+channel_is_eof
+channel_is_open
+channel_new
+channel_open_forward
+channel_open_session
+channel_poll
+channel_read
+channel_read_buffer
+channel_read_nonblocking
+channel_request_env
+channel_request_exec
+channel_request_pty
+channel_request_pty_size
+channel_request_send_signal
+channel_request_sftp
+channel_request_shell
+channel_request_subsystem
+channel_request_x11
+channel_select
+channel_send_eof
+channel_set_blocking
+channel_write
+channel_write_stderr
+privatekey_free
+privatekey_from_file
+publickey_free
+publickey_from_file
+publickey_from_privatekey
+publickey_to_string
+sftp_async_read
+sftp_async_read_begin
+sftp_attributes_free
+sftp_canonicalize_path
+sftp_chmod
+sftp_chown
+sftp_client_message_free
+sftp_client_message_get_data
+sftp_client_message_get_filename
+sftp_client_message_get_flags
+sftp_client_message_get_submessage
+sftp_client_message_get_type
+sftp_client_message_set_filename
+sftp_close
+sftp_closedir
+sftp_dir_eof
+sftp_extension_supported
+sftp_extensions_get_count
+sftp_extensions_get_data
+sftp_extensions_get_name
+sftp_file_set_blocking
+sftp_file_set_nonblocking
+sftp_free
+sftp_fstat
+sftp_fstatvfs
+sftp_fsync
+sftp_get_client_message
+sftp_get_error
+sftp_handle
+sftp_handle_alloc
+sftp_handle_remove
+sftp_init
+sftp_lstat
+sftp_mkdir
+sftp_new
+sftp_new_channel
+sftp_open
+sftp_opendir
+sftp_read
+sftp_readdir
+sftp_readlink
+sftp_rename
+sftp_reply_attr
+sftp_reply_data
+sftp_reply_handle
+sftp_reply_name
+sftp_reply_names
+sftp_reply_names_add
+sftp_reply_status
+sftp_rewind
+sftp_rmdir
+sftp_seek
+sftp_seek64
+sftp_send_client_message
+sftp_server_free
+sftp_server_init
+sftp_server_new
+sftp_server_version
+sftp_setstat
+sftp_stat
+sftp_statvfs
+sftp_statvfs_free
+sftp_symlink
+sftp_tell
+sftp_tell64
+sftp_unlink
+sftp_utimes
+sftp_write
+ssh_accept
+ssh_add_channel_callbacks
+ssh_auth_list
+ssh_basename
+ssh_bind_accept
+ssh_bind_accept_fd
+ssh_bind_fd_toaccept
+ssh_bind_free
+ssh_bind_get_fd
+ssh_bind_listen
+ssh_bind_new
+ssh_bind_options_parse_config
+ssh_bind_options_set
+ssh_bind_set_blocking
+ssh_bind_set_callbacks
+ssh_bind_set_fd
+ssh_blocking_flush
+ssh_buffer_add_data
+ssh_buffer_free
+ssh_buffer_get
+ssh_buffer_get_data
+ssh_buffer_get_len
+ssh_buffer_new
+ssh_buffer_reinit
+ssh_channel_accept_forward
+ssh_channel_accept_x11
+ssh_channel_cancel_forward
+ssh_channel_change_pty_size
+ssh_channel_close
+ssh_channel_free
+ssh_channel_get_exit_status
+ssh_channel_get_session
+ssh_channel_is_closed
+ssh_channel_is_eof
+ssh_channel_is_open
+ssh_channel_listen_forward
+ssh_channel_new
+ssh_channel_open_auth_agent
+ssh_channel_open_forward
+ssh_channel_open_forward_unix
+ssh_channel_open_reverse_forward
+ssh_channel_open_session
+ssh_channel_open_x11
+ssh_channel_poll
+ssh_channel_poll_timeout
+ssh_channel_read
+ssh_channel_read_nonblocking
+ssh_channel_read_timeout
+ssh_channel_request_auth_agent
+ssh_channel_request_env
+ssh_channel_request_exec
+ssh_channel_request_pty
+ssh_channel_request_pty_size
+ssh_channel_request_send_break
+ssh_channel_request_send_exit_signal
+ssh_channel_request_send_exit_status
+ssh_channel_request_send_signal
+ssh_channel_request_sftp
+ssh_channel_request_shell
+ssh_channel_request_subsystem
+ssh_channel_request_x11
+ssh_channel_select
+ssh_channel_send_eof
+ssh_channel_set_blocking
+ssh_channel_set_counter
+ssh_channel_window_size
+ssh_channel_write
+ssh_channel_write_stderr
+ssh_clean_pubkey_hash
+ssh_connect
+ssh_connector_free
+ssh_connector_new
+ssh_connector_set_in_channel
+ssh_connector_set_in_fd
+ssh_connector_set_out_channel
+ssh_connector_set_out_fd
+ssh_copyright
+ssh_dirname
+ssh_disconnect
+ssh_dump_knownhost
+ssh_event_add_connector
+ssh_event_add_fd
+ssh_event_add_session
+ssh_event_dopoll
+ssh_event_free
+ssh_event_new
+ssh_event_remove_connector
+ssh_event_remove_fd
+ssh_event_remove_session
+ssh_execute_message_callbacks
+ssh_finalize
+ssh_forward_accept
+ssh_forward_cancel
+ssh_forward_listen
+ssh_free
+ssh_get_cipher_in
+ssh_get_cipher_out
+ssh_get_clientbanner
+ssh_get_disconnect_message
+ssh_get_error
+ssh_get_error_code
+ssh_get_fd
+ssh_get_fingerprint_hash
+ssh_get_hexa
+ssh_get_hmac_in
+ssh_get_hmac_out
+ssh_get_issue_banner
+ssh_get_kex_algo
+ssh_get_log_callback
+ssh_get_log_level
+ssh_get_log_userdata
+ssh_get_openssh_version
+ssh_get_poll_flags
+ssh_get_pubkey
+ssh_get_pubkey_hash
+ssh_get_publickey
+ssh_get_publickey_hash
+ssh_get_random
+ssh_get_server_publickey
+ssh_get_serverbanner
+ssh_get_status
+ssh_get_version
+ssh_getpass
+ssh_gssapi_get_creds
+ssh_gssapi_set_creds
+ssh_handle_key_exchange
+ssh_init
+ssh_is_blocking
+ssh_is_connected
+ssh_is_server_known
+ssh_key_cmp
+ssh_key_free
+ssh_key_is_private
+ssh_key_is_public
+ssh_key_new
+ssh_key_type
+ssh_key_type_from_name
+ssh_key_type_to_char
+ssh_known_hosts_parse_line
+ssh_knownhosts_entry_free
+ssh_log
+ssh_message_auth_interactive_request
+ssh_message_auth_kbdint_is_response
+ssh_message_auth_password
+ssh_message_auth_pubkey
+ssh_message_auth_publickey
+ssh_message_auth_publickey_state
+ssh_message_auth_reply_pk_ok
+ssh_message_auth_reply_pk_ok_simple
+ssh_message_auth_reply_success
+ssh_message_auth_set_methods
+ssh_message_auth_user
+ssh_message_channel_request_channel
+ssh_message_channel_request_command
+ssh_message_channel_request_env_name
+ssh_message_channel_request_env_value
+ssh_message_channel_request_open_destination
+ssh_message_channel_request_open_destination_port
+ssh_message_channel_request_open_originator
+ssh_message_channel_request_open_originator_port
+ssh_message_channel_request_open_reply_accept
+ssh_message_channel_request_open_reply_accept_channel
+ssh_message_channel_request_pty_height
+ssh_message_channel_request_pty_pxheight
+ssh_message_channel_request_pty_pxwidth
+ssh_message_channel_request_pty_term
+ssh_message_channel_request_pty_width
+ssh_message_channel_request_reply_success
+ssh_message_channel_request_subsystem
+ssh_message_channel_request_x11_auth_cookie
+ssh_message_channel_request_x11_auth_protocol
+ssh_message_channel_request_x11_screen_number
+ssh_message_channel_request_x11_single_connection
+ssh_message_free
+ssh_message_get
+ssh_message_global_request_address
+ssh_message_global_request_port
+ssh_message_global_request_reply_success
+ssh_message_reply_default
+ssh_message_retrieve
+ssh_message_service_reply_success
+ssh_message_service_service
+ssh_message_subtype
+ssh_message_type
+ssh_mkdir
+ssh_new
+ssh_options_copy
+ssh_options_get
+ssh_options_get_port
+ssh_options_getopt
+ssh_options_parse_config
+ssh_options_set
+ssh_pcap_file_close
+ssh_pcap_file_free
+ssh_pcap_file_new
+ssh_pcap_file_open
+ssh_pki_copy_cert_to_privkey
+ssh_pki_export_privkey_base64
+ssh_pki_export_privkey_file
+ssh_pki_export_privkey_to_pubkey
+ssh_pki_export_pubkey_base64
+ssh_pki_export_pubkey_file
+ssh_pki_generate
+ssh_pki_import_cert_base64
+ssh_pki_import_cert_file
+ssh_pki_import_privkey_base64
+ssh_pki_import_privkey_file
+ssh_pki_import_pubkey_base64
+ssh_pki_import_pubkey_file
+ssh_pki_key_ecdsa_name
+ssh_print_hash
+ssh_print_hexa
+ssh_privatekey_type
+ssh_publickey_to_file
+ssh_remove_channel_callbacks
+ssh_scp_accept_request
+ssh_scp_close
+ssh_scp_deny_request
+ssh_scp_free
+ssh_scp_init
+ssh_scp_leave_directory
+ssh_scp_new
+ssh_scp_pull_request
+ssh_scp_push_directory
+ssh_scp_push_file
+ssh_scp_push_file64
+ssh_scp_read
+ssh_scp_request_get_filename
+ssh_scp_request_get_permissions
+ssh_scp_request_get_size
+ssh_scp_request_get_size64
+ssh_scp_request_get_warning
+ssh_scp_write
+ssh_select
+ssh_send_debug
+ssh_send_ignore
+ssh_send_keepalive
+ssh_server_init_kex
+ssh_service_request
+ssh_session_export_known_hosts_entry
+ssh_session_get_known_hosts_entry
+ssh_session_has_known_hosts_entry
+ssh_session_is_known_server
+ssh_session_update_known_hosts
+ssh_set_agent_channel
+ssh_set_agent_socket
+ssh_set_auth_methods
+ssh_set_blocking
+ssh_set_callbacks
+ssh_set_channel_callbacks
+ssh_set_counters
+ssh_set_fd_except
+ssh_set_fd_toread
+ssh_set_fd_towrite
+ssh_set_log_callback
+ssh_set_log_level
+ssh_set_log_userdata
+ssh_set_message_callback
+ssh_set_pcap_file
+ssh_set_server_callbacks
+ssh_silent_disconnect
+ssh_string_burn
+ssh_string_copy
+ssh_string_data
+ssh_string_fill
+ssh_string_free
+ssh_string_free_char
+ssh_string_from_char
+ssh_string_get_char
+ssh_string_len
+ssh_string_new
+ssh_string_to_char
+ssh_threads_get_default
+ssh_threads_get_noop
+ssh_threads_get_pthread
+ssh_threads_set_callbacks
+ssh_try_publickey_from_file
+ssh_userauth_agent
+ssh_userauth_agent_pubkey
+ssh_userauth_autopubkey
+ssh_userauth_gssapi
+ssh_userauth_kbdint
+ssh_userauth_kbdint_getanswer
+ssh_userauth_kbdint_getinstruction
+ssh_userauth_kbdint_getname
+ssh_userauth_kbdint_getnanswers
+ssh_userauth_kbdint_getnprompts
+ssh_userauth_kbdint_getprompt
+ssh_userauth_kbdint_setanswer
+ssh_userauth_list
+ssh_userauth_none
+ssh_userauth_offer_pubkey
+ssh_userauth_password
+ssh_userauth_privatekey_file
+ssh_userauth_pubkey
+ssh_userauth_publickey
+ssh_userauth_publickey_auto
+ssh_userauth_try_publickey
+ssh_version
+ssh_write_knownhost
+string_burn
+string_copy
+string_data
+string_fill
+string_free
+string_from_char
+string_len
+string_new
+string_to_char

src/ABI/libssh-4.8.3.symbols

@@ -0,0 +1,421 @@
+_ssh_log
+buffer_free
+buffer_get
+buffer_get_len
+buffer_new
+channel_accept_x11
+channel_change_pty_size
+channel_close
+channel_forward_accept
+channel_forward_cancel
+channel_forward_listen
+channel_free
+channel_get_exit_status
+channel_get_session
+channel_is_closed
+channel_is_eof
+channel_is_open
+channel_new
+channel_open_forward
+channel_open_session
+channel_poll
+channel_read
+channel_read_buffer
+channel_read_nonblocking
+channel_request_env
+channel_request_exec
+channel_request_pty
+channel_request_pty_size
+channel_request_send_signal
+channel_request_sftp
+channel_request_shell
+channel_request_subsystem
+channel_request_x11
+channel_select
+channel_send_eof
+channel_set_blocking
+channel_write
+channel_write_stderr
+privatekey_free
+privatekey_from_file
+publickey_free
+publickey_from_file
+publickey_from_privatekey
+publickey_to_string
+sftp_async_read
+sftp_async_read_begin
+sftp_attributes_free
+sftp_canonicalize_path
+sftp_chmod
+sftp_chown
+sftp_client_message_free
+sftp_client_message_get_data
+sftp_client_message_get_filename
+sftp_client_message_get_flags
+sftp_client_message_get_submessage
+sftp_client_message_get_type
+sftp_client_message_set_filename
+sftp_close
+sftp_closedir
+sftp_dir_eof
+sftp_extension_supported
+sftp_extensions_get_count
+sftp_extensions_get_data
+sftp_extensions_get_name
+sftp_file_set_blocking
+sftp_file_set_nonblocking
+sftp_free
+sftp_fstat
+sftp_fstatvfs
+sftp_fsync
+sftp_get_client_message
+sftp_get_error
+sftp_handle
+sftp_handle_alloc
+sftp_handle_remove
+sftp_init
+sftp_lstat
+sftp_mkdir
+sftp_new
+sftp_new_channel
+sftp_open
+sftp_opendir
+sftp_read
+sftp_readdir
+sftp_readlink
+sftp_rename
+sftp_reply_attr
+sftp_reply_data
+sftp_reply_handle
+sftp_reply_name
+sftp_reply_names
+sftp_reply_names_add
+sftp_reply_status
+sftp_rewind
+sftp_rmdir
+sftp_seek
+sftp_seek64
+sftp_send_client_message
+sftp_server_free
+sftp_server_init
+sftp_server_new
+sftp_server_version
+sftp_setstat
+sftp_stat
+sftp_statvfs
+sftp_statvfs_free
+sftp_symlink
+sftp_tell
+sftp_tell64
+sftp_unlink
+sftp_utimes
+sftp_write
+ssh_accept
+ssh_add_channel_callbacks
+ssh_auth_list
+ssh_basename
+ssh_bind_accept
+ssh_bind_accept_fd
+ssh_bind_fd_toaccept
+ssh_bind_free
+ssh_bind_get_fd
+ssh_bind_listen
+ssh_bind_new
+ssh_bind_options_parse_config
+ssh_bind_options_set
+ssh_bind_set_blocking
+ssh_bind_set_callbacks
+ssh_bind_set_fd
+ssh_blocking_flush
+ssh_buffer_add_data
+ssh_buffer_free
+ssh_buffer_get
+ssh_buffer_get_data
+ssh_buffer_get_len
+ssh_buffer_new
+ssh_buffer_reinit
+ssh_channel_accept_forward
+ssh_channel_accept_x11
+ssh_channel_cancel_forward
+ssh_channel_change_pty_size
+ssh_channel_close
+ssh_channel_free
+ssh_channel_get_exit_status
+ssh_channel_get_session
+ssh_channel_is_closed
+ssh_channel_is_eof
+ssh_channel_is_open
+ssh_channel_listen_forward
+ssh_channel_new
+ssh_channel_open_auth_agent
+ssh_channel_open_forward
+ssh_channel_open_forward_unix
+ssh_channel_open_reverse_forward
+ssh_channel_open_session
+ssh_channel_open_x11
+ssh_channel_poll
+ssh_channel_poll_timeout
+ssh_channel_read
+ssh_channel_read_nonblocking
+ssh_channel_read_timeout
+ssh_channel_request_auth_agent
+ssh_channel_request_env
+ssh_channel_request_exec
+ssh_channel_request_pty
+ssh_channel_request_pty_size
+ssh_channel_request_send_break
+ssh_channel_request_send_exit_signal
+ssh_channel_request_send_exit_status
+ssh_channel_request_send_signal
+ssh_channel_request_sftp
+ssh_channel_request_shell
+ssh_channel_request_subsystem
+ssh_channel_request_x11
+ssh_channel_select
+ssh_channel_send_eof
+ssh_channel_set_blocking
+ssh_channel_set_counter
+ssh_channel_window_size
+ssh_channel_write
+ssh_channel_write_stderr
+ssh_clean_pubkey_hash
+ssh_connect
+ssh_connector_free
+ssh_connector_new
+ssh_connector_set_in_channel
+ssh_connector_set_in_fd
+ssh_connector_set_out_channel
+ssh_connector_set_out_fd
+ssh_copyright
+ssh_dirname
+ssh_disconnect
+ssh_dump_knownhost
+ssh_event_add_connector
+ssh_event_add_fd
+ssh_event_add_session
+ssh_event_dopoll
+ssh_event_free
+ssh_event_new
+ssh_event_remove_connector
+ssh_event_remove_fd
+ssh_event_remove_session
+ssh_execute_message_callbacks
+ssh_finalize
+ssh_forward_accept
+ssh_forward_cancel
+ssh_forward_listen
+ssh_free
+ssh_get_cipher_in
+ssh_get_cipher_out
+ssh_get_clientbanner
+ssh_get_disconnect_message
+ssh_get_error
+ssh_get_error_code
+ssh_get_fd
+ssh_get_fingerprint_hash
+ssh_get_hexa
+ssh_get_hmac_in
+ssh_get_hmac_out
+ssh_get_issue_banner
+ssh_get_kex_algo
+ssh_get_log_callback
+ssh_get_log_level
+ssh_get_log_userdata
+ssh_get_openssh_version
+ssh_get_poll_flags
+ssh_get_pubkey
+ssh_get_pubkey_hash
+ssh_get_publickey
+ssh_get_publickey_hash
+ssh_get_random
+ssh_get_server_publickey
+ssh_get_serverbanner
+ssh_get_status
+ssh_get_version
+ssh_getpass
+ssh_gssapi_get_creds
+ssh_gssapi_set_creds
+ssh_handle_key_exchange
+ssh_init
+ssh_is_blocking
+ssh_is_connected
+ssh_is_server_known
+ssh_key_cmp
+ssh_key_free
+ssh_key_is_private
+ssh_key_is_public
+ssh_key_new
+ssh_key_type
+ssh_key_type_from_name
+ssh_key_type_to_char
+ssh_known_hosts_parse_line
+ssh_knownhosts_entry_free
+ssh_log
+ssh_message_auth_interactive_request
+ssh_message_auth_kbdint_is_response
+ssh_message_auth_password
+ssh_message_auth_pubkey
+ssh_message_auth_publickey
+ssh_message_auth_publickey_state
+ssh_message_auth_reply_pk_ok
+ssh_message_auth_reply_pk_ok_simple
+ssh_message_auth_reply_success
+ssh_message_auth_set_methods
+ssh_message_auth_user
+ssh_message_channel_request_channel
+ssh_message_channel_request_command
+ssh_message_channel_request_env_name
+ssh_message_channel_request_env_value
+ssh_message_channel_request_open_destination
+ssh_message_channel_request_open_destination_port
+ssh_message_channel_request_open_originator
+ssh_message_channel_request_open_originator_port
+ssh_message_channel_request_open_reply_accept
+ssh_message_channel_request_open_reply_accept_channel
+ssh_message_channel_request_pty_height
+ssh_message_channel_request_pty_pxheight
+ssh_message_channel_request_pty_pxwidth
+ssh_message_channel_request_pty_term
+ssh_message_channel_request_pty_width
+ssh_message_channel_request_reply_success
+ssh_message_channel_request_subsystem
+ssh_message_channel_request_x11_auth_cookie
+ssh_message_channel_request_x11_auth_protocol
+ssh_message_channel_request_x11_screen_number
+ssh_message_channel_request_x11_single_connection
+ssh_message_free
+ssh_message_get
+ssh_message_global_request_address
+ssh_message_global_request_port
+ssh_message_global_request_reply_success
+ssh_message_reply_default
+ssh_message_retrieve
+ssh_message_service_reply_success
+ssh_message_service_service
+ssh_message_subtype
+ssh_message_type
+ssh_mkdir
+ssh_new
+ssh_options_copy
+ssh_options_get
+ssh_options_get_port
+ssh_options_getopt
+ssh_options_parse_config
+ssh_options_set
+ssh_pcap_file_close
+ssh_pcap_file_free
+ssh_pcap_file_new
+ssh_pcap_file_open
+ssh_pki_copy_cert_to_privkey
+ssh_pki_export_privkey_base64
+ssh_pki_export_privkey_file
+ssh_pki_export_privkey_to_pubkey
+ssh_pki_export_pubkey_base64
+ssh_pki_export_pubkey_file
+ssh_pki_generate
+ssh_pki_import_cert_base64
+ssh_pki_import_cert_file
+ssh_pki_import_privkey_base64
+ssh_pki_import_privkey_file
+ssh_pki_import_pubkey_base64
+ssh_pki_import_pubkey_file
+ssh_pki_key_ecdsa_name
+ssh_print_hash
+ssh_print_hexa
+ssh_privatekey_type
+ssh_publickey_to_file
+ssh_remove_channel_callbacks
+ssh_scp_accept_request
+ssh_scp_close
+ssh_scp_deny_request
+ssh_scp_free
+ssh_scp_init
+ssh_scp_leave_directory
+ssh_scp_new
+ssh_scp_pull_request
+ssh_scp_push_directory
+ssh_scp_push_file
+ssh_scp_push_file64
+ssh_scp_read
+ssh_scp_request_get_filename
+ssh_scp_request_get_permissions
+ssh_scp_request_get_size
+ssh_scp_request_get_size64
+ssh_scp_request_get_warning
+ssh_scp_write
+ssh_select
+ssh_send_debug
+ssh_send_ignore
+ssh_send_keepalive
+ssh_server_init_kex
+ssh_service_request
+ssh_session_export_known_hosts_entry
+ssh_session_get_known_hosts_entry
+ssh_session_has_known_hosts_entry
+ssh_session_is_known_server
+ssh_session_update_known_hosts
+ssh_set_agent_channel
+ssh_set_agent_socket
+ssh_set_auth_methods
+ssh_set_blocking
+ssh_set_callbacks
+ssh_set_channel_callbacks
+ssh_set_counters
+ssh_set_fd_except
+ssh_set_fd_toread
+ssh_set_fd_towrite
+ssh_set_log_callback
+ssh_set_log_level
+ssh_set_log_userdata
+ssh_set_message_callback
+ssh_set_pcap_file
+ssh_set_server_callbacks
+ssh_silent_disconnect
+ssh_string_burn
+ssh_string_copy
+ssh_string_data
+ssh_string_fill
+ssh_string_free
+ssh_string_free_char
+ssh_string_from_char
+ssh_string_get_char
+ssh_string_len
+ssh_string_new
+ssh_string_to_char
+ssh_threads_get_default
+ssh_threads_get_noop
+ssh_threads_get_pthread
+ssh_threads_set_callbacks
+ssh_try_publickey_from_file
+ssh_userauth_agent
+ssh_userauth_agent_pubkey
+ssh_userauth_autopubkey
+ssh_userauth_gssapi
+ssh_userauth_kbdint
+ssh_userauth_kbdint_getanswer
+ssh_userauth_kbdint_getinstruction
+ssh_userauth_kbdint_getname
+ssh_userauth_kbdint_getnanswers
+ssh_userauth_kbdint_getnprompts
+ssh_userauth_kbdint_getprompt
+ssh_userauth_kbdint_setanswer
+ssh_userauth_list
+ssh_userauth_none
+ssh_userauth_offer_pubkey
+ssh_userauth_password
+ssh_userauth_privatekey_file
+ssh_userauth_pubkey
+ssh_userauth_publickey
+ssh_userauth_publickey_auto
+ssh_userauth_try_publickey
+ssh_version
+ssh_write_knownhost
+string_burn
+string_copy
+string_data
+string_fill
+string_free
+string_from_char
+string_len
+string_new
+string_to_char

src/ABI/libssh-4.8.4.symbols

@@ -0,0 +1,421 @@
+_ssh_log
+buffer_free
+buffer_get
+buffer_get_len
+buffer_new
+channel_accept_x11
+channel_change_pty_size
+channel_close
+channel_forward_accept
+channel_forward_cancel
+channel_forward_listen
+channel_free
+channel_get_exit_status
+channel_get_session
+channel_is_closed
+channel_is_eof
+channel_is_open
+channel_new
+channel_open_forward
+channel_open_session
+channel_poll
+channel_read
+channel_read_buffer
+channel_read_nonblocking
+channel_request_env
+channel_request_exec
+channel_request_pty
+channel_request_pty_size
+channel_request_send_signal
+channel_request_sftp
+channel_request_shell
+channel_request_subsystem
+channel_request_x11
+channel_select
+channel_send_eof
+channel_set_blocking
+channel_write
+channel_write_stderr
+privatekey_free
+privatekey_from_file
+publickey_free
+publickey_from_file
+publickey_from_privatekey
+publickey_to_string
+sftp_async_read
+sftp_async_read_begin
+sftp_attributes_free
+sftp_canonicalize_path
+sftp_chmod
+sftp_chown
+sftp_client_message_free
+sftp_client_message_get_data
+sftp_client_message_get_filename
+sftp_client_message_get_flags
+sftp_client_message_get_submessage
+sftp_client_message_get_type
+sftp_client_message_set_filename
+sftp_close
+sftp_closedir
+sftp_dir_eof
+sftp_extension_supported
+sftp_extensions_get_count
+sftp_extensions_get_data
+sftp_extensions_get_name
+sftp_file_set_blocking
+sftp_file_set_nonblocking
+sftp_free
+sftp_fstat
+sftp_fstatvfs
+sftp_fsync
+sftp_get_client_message
+sftp_get_error
+sftp_handle
+sftp_handle_alloc
+sftp_handle_remove
+sftp_init
+sftp_lstat
+sftp_mkdir
+sftp_new
+sftp_new_channel
+sftp_open
+sftp_opendir
+sftp_read
+sftp_readdir
+sftp_readlink
+sftp_rename
+sftp_reply_attr
+sftp_reply_data
+sftp_reply_handle
+sftp_reply_name
+sftp_reply_names
+sftp_reply_names_add
+sftp_reply_status
+sftp_rewind
+sftp_rmdir
+sftp_seek
+sftp_seek64
+sftp_send_client_message
+sftp_server_free
+sftp_server_init
+sftp_server_new
+sftp_server_version
+sftp_setstat
+sftp_stat
+sftp_statvfs
+sftp_statvfs_free
+sftp_symlink
+sftp_tell
+sftp_tell64
+sftp_unlink
+sftp_utimes
+sftp_write
+ssh_accept
+ssh_add_channel_callbacks
+ssh_auth_list
+ssh_basename
+ssh_bind_accept
+ssh_bind_accept_fd
+ssh_bind_fd_toaccept
+ssh_bind_free
+ssh_bind_get_fd
+ssh_bind_listen
+ssh_bind_new
+ssh_bind_options_parse_config
+ssh_bind_options_set
+ssh_bind_set_blocking
+ssh_bind_set_callbacks
+ssh_bind_set_fd
+ssh_blocking_flush
+ssh_buffer_add_data
+ssh_buffer_free
+ssh_buffer_get
+ssh_buffer_get_data
+ssh_buffer_get_len
+ssh_buffer_new
+ssh_buffer_reinit
+ssh_channel_accept_forward
+ssh_channel_accept_x11
+ssh_channel_cancel_forward
+ssh_channel_change_pty_size
+ssh_channel_close
+ssh_channel_free
+ssh_channel_get_exit_status
+ssh_channel_get_session
+ssh_channel_is_closed
+ssh_channel_is_eof
+ssh_channel_is_open
+ssh_channel_listen_forward
+ssh_channel_new
+ssh_channel_open_auth_agent
+ssh_channel_open_forward
+ssh_channel_open_forward_unix
+ssh_channel_open_reverse_forward
+ssh_channel_open_session
+ssh_channel_open_x11
+ssh_channel_poll
+ssh_channel_poll_timeout
+ssh_channel_read
+ssh_channel_read_nonblocking
+ssh_channel_read_timeout
+ssh_channel_request_auth_agent
+ssh_channel_request_env
+ssh_channel_request_exec
+ssh_channel_request_pty
+ssh_channel_request_pty_size
+ssh_channel_request_send_break
+ssh_channel_request_send_exit_signal
+ssh_channel_request_send_exit_status
+ssh_channel_request_send_signal
+ssh_channel_request_sftp
+ssh_channel_request_shell
+ssh_channel_request_subsystem
+ssh_channel_request_x11
+ssh_channel_select
+ssh_channel_send_eof
+ssh_channel_set_blocking
+ssh_channel_set_counter
+ssh_channel_window_size
+ssh_channel_write
+ssh_channel_write_stderr
+ssh_clean_pubkey_hash
+ssh_connect
+ssh_connector_free
+ssh_connector_new
+ssh_connector_set_in_channel
+ssh_connector_set_in_fd
+ssh_connector_set_out_channel
+ssh_connector_set_out_fd
+ssh_copyright
+ssh_dirname
+ssh_disconnect
+ssh_dump_knownhost
+ssh_event_add_connector
+ssh_event_add_fd
+ssh_event_add_session
+ssh_event_dopoll
+ssh_event_free
+ssh_event_new
+ssh_event_remove_connector
+ssh_event_remove_fd
+ssh_event_remove_session
+ssh_execute_message_callbacks
+ssh_finalize
+ssh_forward_accept
+ssh_forward_cancel
+ssh_forward_listen
+ssh_free
+ssh_get_cipher_in
+ssh_get_cipher_out
+ssh_get_clientbanner
+ssh_get_disconnect_message
+ssh_get_error
+ssh_get_error_code
+ssh_get_fd
+ssh_get_fingerprint_hash
+ssh_get_hexa
+ssh_get_hmac_in
+ssh_get_hmac_out
+ssh_get_issue_banner
+ssh_get_kex_algo
+ssh_get_log_callback
+ssh_get_log_level
+ssh_get_log_userdata
+ssh_get_openssh_version
+ssh_get_poll_flags
+ssh_get_pubkey
+ssh_get_pubkey_hash
+ssh_get_publickey
+ssh_get_publickey_hash
+ssh_get_random
+ssh_get_server_publickey
+ssh_get_serverbanner
+ssh_get_status
+ssh_get_version
+ssh_getpass
+ssh_gssapi_get_creds
+ssh_gssapi_set_creds
+ssh_handle_key_exchange
+ssh_init
+ssh_is_blocking
+ssh_is_connected
+ssh_is_server_known
+ssh_key_cmp
+ssh_key_free
+ssh_key_is_private
+ssh_key_is_public
+ssh_key_new
+ssh_key_type
+ssh_key_type_from_name
+ssh_key_type_to_char
+ssh_known_hosts_parse_line
+ssh_knownhosts_entry_free
+ssh_log
+ssh_message_auth_interactive_request
+ssh_message_auth_kbdint_is_response
+ssh_message_auth_password
+ssh_message_auth_pubkey
+ssh_message_auth_publickey
+ssh_message_auth_publickey_state
+ssh_message_auth_reply_pk_ok
+ssh_message_auth_reply_pk_ok_simple
+ssh_message_auth_reply_success
+ssh_message_auth_set_methods
+ssh_message_auth_user
+ssh_message_channel_request_channel
+ssh_message_channel_request_command
+ssh_message_channel_request_env_name
+ssh_message_channel_request_env_value
+ssh_message_channel_request_open_destination
+ssh_message_channel_request_open_destination_port
+ssh_message_channel_request_open_originator
+ssh_message_channel_request_open_originator_port
+ssh_message_channel_request_open_reply_accept
+ssh_message_channel_request_open_reply_accept_channel
+ssh_message_channel_request_pty_height
+ssh_message_channel_request_pty_pxheight
+ssh_message_channel_request_pty_pxwidth
+ssh_message_channel_request_pty_term
+ssh_message_channel_request_pty_width
+ssh_message_channel_request_reply_success
+ssh_message_channel_request_subsystem
+ssh_message_channel_request_x11_auth_cookie
+ssh_message_channel_request_x11_auth_protocol
+ssh_message_channel_request_x11_screen_number
+ssh_message_channel_request_x11_single_connection
+ssh_message_free
+ssh_message_get
+ssh_message_global_request_address
+ssh_message_global_request_port
+ssh_message_global_request_reply_success
+ssh_message_reply_default
+ssh_message_retrieve
+ssh_message_service_reply_success
+ssh_message_service_service
+ssh_message_subtype
+ssh_message_type
+ssh_mkdir
+ssh_new
+ssh_options_copy
+ssh_options_get
+ssh_options_get_port
+ssh_options_getopt
+ssh_options_parse_config
+ssh_options_set
+ssh_pcap_file_close
+ssh_pcap_file_free
+ssh_pcap_file_new
+ssh_pcap_file_open
+ssh_pki_copy_cert_to_privkey
+ssh_pki_export_privkey_base64
+ssh_pki_export_privkey_file
+ssh_pki_export_privkey_to_pubkey
+ssh_pki_export_pubkey_base64
+ssh_pki_export_pubkey_file
+ssh_pki_generate
+ssh_pki_import_cert_base64
+ssh_pki_import_cert_file
+ssh_pki_import_privkey_base64
+ssh_pki_import_privkey_file
+ssh_pki_import_pubkey_base64
+ssh_pki_import_pubkey_file
+ssh_pki_key_ecdsa_name
+ssh_print_hash
+ssh_print_hexa
+ssh_privatekey_type
+ssh_publickey_to_file
+ssh_remove_channel_callbacks
+ssh_scp_accept_request
+ssh_scp_close
+ssh_scp_deny_request
+ssh_scp_free
+ssh_scp_init
+ssh_scp_leave_directory
+ssh_scp_new
+ssh_scp_pull_request
+ssh_scp_push_directory
+ssh_scp_push_file
+ssh_scp_push_file64
+ssh_scp_read
+ssh_scp_request_get_filename
+ssh_scp_request_get_permissions
+ssh_scp_request_get_size
+ssh_scp_request_get_size64
+ssh_scp_request_get_warning
+ssh_scp_write
+ssh_select
+ssh_send_debug
+ssh_send_ignore
+ssh_send_keepalive
+ssh_server_init_kex
+ssh_service_request
+ssh_session_export_known_hosts_entry
+ssh_session_get_known_hosts_entry
+ssh_session_has_known_hosts_entry
+ssh_session_is_known_server
+ssh_session_update_known_hosts
+ssh_set_agent_channel
+ssh_set_agent_socket
+ssh_set_auth_methods
+ssh_set_blocking
+ssh_set_callbacks
+ssh_set_channel_callbacks
+ssh_set_counters
+ssh_set_fd_except
+ssh_set_fd_toread
+ssh_set_fd_towrite
+ssh_set_log_callback
+ssh_set_log_level
+ssh_set_log_userdata
+ssh_set_message_callback
+ssh_set_pcap_file
+ssh_set_server_callbacks
+ssh_silent_disconnect
+ssh_string_burn
+ssh_string_copy
+ssh_string_data
+ssh_string_fill
+ssh_string_free
+ssh_string_free_char
+ssh_string_from_char
+ssh_string_get_char
+ssh_string_len
+ssh_string_new
+ssh_string_to_char
+ssh_threads_get_default
+ssh_threads_get_noop
+ssh_threads_get_pthread
+ssh_threads_set_callbacks
+ssh_try_publickey_from_file
+ssh_userauth_agent
+ssh_userauth_agent_pubkey
+ssh_userauth_autopubkey
+ssh_userauth_gssapi
+ssh_userauth_kbdint
+ssh_userauth_kbdint_getanswer
+ssh_userauth_kbdint_getinstruction
+ssh_userauth_kbdint_getname
+ssh_userauth_kbdint_getnanswers
+ssh_userauth_kbdint_getnprompts
+ssh_userauth_kbdint_getprompt
+ssh_userauth_kbdint_setanswer
+ssh_userauth_list
+ssh_userauth_none
+ssh_userauth_offer_pubkey
+ssh_userauth_password
+ssh_userauth_privatekey_file
+ssh_userauth_pubkey
+ssh_userauth_publickey
+ssh_userauth_publickey_auto
+ssh_userauth_try_publickey
+ssh_version
+ssh_write_knownhost
+string_burn
+string_copy
+string_data
+string_fill
+string_free
+string_from_char
+string_len
+string_new
+string_to_char

src/CMakeLists.txt

@@ -1,7 +1,4 @@
-set(LIBSSH_PUBLIC_INCLUDE_DIRS
-  ${libssh_SOURCE_DIR}/include
-  CACHE INTERNAL "libssh public include directories"
-)
+set(LIBSSH_PUBLIC_INCLUDE_DIRS ${libssh_SOURCE_DIR}/include)
 
 set(LIBSSH_PRIVATE_INCLUDE_DIRS
   ${libssh_BINARY_DIR}
@@ -18,13 +15,6 @@ if (WIN32)
   )
 endif (WIN32)
 
-if (HAVE_LIBSOCKET)
-  set(LIBSSH_LINK_LIBRARIES
-    ${LIBSSH_LINK_LIBRARIES}
-    socket
-  )
-endif (HAVE_LIBSOCKET)
-
 if (OPENSSL_CRYPTO_LIBRARY)
   set(LIBSSH_PRIVATE_INCLUDE_DIRS
     ${LIBSSH_PRIVATE_INCLUDE_DIRS}
@@ -95,16 +85,6 @@ if (WITH_NACL AND NACL_FOUND)
   )
 endif (WITH_NACL AND NACL_FOUND)
 
-set(LIBSSH_LINK_LIBRARIES
-  ${LIBSSH_LINK_LIBRARIES}
-  CACHE INTERNAL "libssh link libraries"
-)
-
-set(LIBSSH_SHARED_LIBRARY
-  ssh_shared
-  CACHE INTERNAL "libssh shared library"
-)
-
 if (BUILD_STATIC_LIB)
   set(LIBSSH_STATIC_LIBRARY
     ssh_static
@@ -146,7 +126,6 @@ set(libssh_SRCS
   pcap.c
   pki.c
   pki_container_openssh.c
-  pki_ed25519.c
   poll.c
   session.c
   scp.c
@@ -157,14 +136,11 @@ set(libssh_SRCS
   external/bcrypt_pbkdf.c
   external/blowfish.c
   external/chacha.c
-  external/ed25519.c
-  external/fe25519.c
-  external/ge25519.c
   external/poly1305.c
-  external/sc25519.c
   chachapoly.c
   config_parser.c
   token.c
+  pki_ed25519_common.c
 )
 
 if (DEFAULT_C_NO_DEPRECATION_FLAGS)
@@ -201,6 +177,11 @@ if (WITH_GCRYPT)
         pki_gcrypt.c
         ecdh_gcrypt.c
         dh_key.c
+        pki_ed25519.c
+        external/ed25519.c
+        external/fe25519.c
+        external/ge25519.c
+        external/sc25519.c
        )
 elseif (WITH_MBEDTLS)
     set(libssh_SRCS
@@ -211,6 +192,11 @@ elseif (WITH_MBEDTLS)
         pki_mbedcrypto.c
         ecdh_mbedcrypto.c
         dh_key.c
+        pki_ed25519.c
+        external/ed25519.c
+        external/fe25519.c
+        external/ge25519.c
+        external/sc25519.c
        )
 else (WITH_GCRYPT)
     set(libssh_SRCS
@@ -221,6 +207,16 @@ else (WITH_GCRYPT)
         libcrypto.c
         dh_crypto.c
        )
+    if (NOT HAVE_OPENSSL_ED25519)
+        set(libssh_SRCS
+            ${libssh_SRCS}
+            pki_ed25519.c
+            external/ed25519.c
+            external/fe25519.c
+            external/ge25519.c
+            external/sc25519.c
+           )
+    endif (NOT HAVE_OPENSSL_ED25519)
     if(OPENSSL_VERSION VERSION_LESS "1.1.0")
         set(libssh_SRCS ${libssh_SRCS} libcrypto-compat.c)
     endif()
@@ -271,17 +267,14 @@ if (WITH_GSSAPI AND GSSAPI_FOUND)
 endif (WITH_GSSAPI AND GSSAPI_FOUND)
 
 if (NOT WITH_NACL)
-  set(libssh_SRCS
-    ${libssh_SRCS}
-    external/curve25519_ref.c
-  )
+    if (NOT HAVE_OPENSSL_ED25519)
+        set(libssh_SRCS
+            ${libssh_SRCS}
+            external/curve25519_ref.c
+           )
+    endif (NOT HAVE_OPENSSL_ED25519)
 endif (NOT WITH_NACL)
 
-include_directories(
-  ${LIBSSH_PUBLIC_INCLUDE_DIRS}
-  ${LIBSSH_PRIVATE_INCLUDE_DIRS}
-)
-
 # Set the path to the default map file
 set(MAP_PATH "${CMAKE_CURRENT_SOURCE_DIR}/${PROJECT_NAME}.map")
 
@@ -313,13 +306,27 @@ if (WITH_SYMBOL_VERSIONING AND HAVE_LD_VERSION_SCRIPT AND ABIMAP_FOUND)
     )
 endif (WITH_SYMBOL_VERSIONING AND HAVE_LD_VERSION_SCRIPT AND ABIMAP_FOUND)
 
-add_library(${LIBSSH_SHARED_LIBRARY} SHARED ${libssh_SRCS})
-target_compile_options(${LIBSSH_SHARED_LIBRARY}
+# This gets built as a static library, if -DBUILD_SHARED_LIBS=OFF is passed to
+# cmake.
+add_library(ssh ${libssh_SRCS})
+target_compile_options(ssh
                        PRIVATE
                            ${DEFAULT_C_COMPILE_FLAGS}
                            -D_GNU_SOURCE)
+target_include_directories(ssh
+                           PUBLIC
+                               $<BUILD_INTERFACE:${libssh_SOURCE_DIR}/include>
+                               $<INSTALL_INTERFACE:include>
+                           PRIVATE ${LIBSSH_PRIVATE_INCLUDE_DIRS})
 
-target_link_libraries(${LIBSSH_SHARED_LIBRARY} ${LIBSSH_LINK_LIBRARIES})
+target_link_libraries(ssh
+                      PRIVATE ${LIBSSH_LINK_LIBRARIES})
+
+if (WIN32 AND NOT BUILD_SHARED_LIBS)
+    set_target_properties(ssh PROPERTIES COMPILE_FLAGS "-DLIBSSH_STATIC")
+endif ()
+
+add_library(ssh::ssh ALIAS ssh)
 
 if (WITH_SYMBOL_VERSIONING AND HAVE_LD_VERSION_SCRIPT)
     if (ABIMAP_FOUND)
@@ -327,56 +334,63 @@ if (WITH_SYMBOL_VERSIONING AND HAVE_LD_VERSION_SCRIPT)
         set(MAP_PATH "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}_dev.map")
     endif (ABIMAP_FOUND)
 
-    set_target_properties(${LIBSSH_SHARED_LIBRARY}
+    set_target_properties(ssh
                           PROPERTIES LINK_FLAGS
                           "-Wl,--version-script,\"${MAP_PATH}\"")
 endif (WITH_SYMBOL_VERSIONING AND HAVE_LD_VERSION_SCRIPT)
 
-set_target_properties(
-  ${LIBSSH_SHARED_LIBRARY}
+set_target_properties(ssh
     PROPERTIES
       VERSION
         ${LIBRARY_VERSION}
       SOVERSION
         ${LIBRARY_SOVERSION}
-      OUTPUT_NAME
-        ssh
       DEFINE_SYMBOL
         LIBSSH_EXPORTS
 )
 
 if (WITH_VISIBILITY_HIDDEN)
-  set_target_properties(${LIBSSH_SHARED_LIBRARY} PROPERTIES COMPILE_FLAGS "-fvisibility=hidden")
+  set_target_properties(ssh PROPERTIES COMPILE_FLAGS "-fvisibility=hidden")
 endif (WITH_VISIBILITY_HIDDEN)
 
 if (MINGW)
-    set_target_properties(${LIBSSH_SHARED_LIBRARY} PROPERTIES LINK_FLAGS "-Wl,--enable-stdcall-fixup")
+    set_target_properties(ssh PROPERTIES LINK_FLAGS "-Wl,--enable-stdcall-fixup")
 endif ()
 
 
-install(
-  TARGETS
-    ${LIBSSH_SHARED_LIBRARY}
-  RUNTIME DESTINATION ${BIN_INSTALL_DIR}
-  LIBRARY DESTINATION ${LIB_INSTALL_DIR}
-  ARCHIVE DESTINATION ${LIB_INSTALL_DIR}
-  COMPONENT libraries
-)
+install(TARGETS ssh
+        EXPORT libssh-config
+        RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        COMPONENT libraries)
+
+install(EXPORT libssh-config
+        DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME})
 
 if (BUILD_STATIC_LIB)
-  add_library(${LIBSSH_STATIC_LIBRARY} STATIC ${libssh_SRCS})
-  target_compile_options(${LIBSSH_STATIC_LIBRARY}
+  add_library(ssh-static STATIC ${libssh_SRCS})
+  target_compile_options(ssh-static
                          PRIVATE
                             ${DEFAULT_C_COMPILE_FLAGS}
                             -D_GNU_SOURCE)
 
+  target_include_directories(ssh-static
+                             PUBLIC
+                                 $<BUILD_INTERFACE:${libssh_SOURCE_DIR}/include>
+                                 $<INSTALL_INTERFACE:include>
+                             PRIVATE ${LIBSSH_PRIVATE_INCLUDE_DIRS})
+  target_link_libraries(ssh-static
+                        PUBLIC ${LIBSSH_LINK_LIBRARIES})
+  add_library(ssh::static ALIAS ssh-static)
+
   if (MSVC)
     set(OUTPUT_SUFFIX static)
   else (MSVC)
     set(OUTPUT_SUFFIX )
   endif (MSVC)
   set_target_properties(
-    ${LIBSSH_STATIC_LIBRARY}
+    ssh-static
       PROPERTIES
         VERSION
           ${LIBRARY_VERSION}
@@ -390,21 +404,12 @@ if (BUILD_STATIC_LIB)
 
   if (WIN32)
     set_target_properties(
-      ${LIBSSH_STATIC_LIBRARY}
+      ssh-static
         PROPERTIES
           COMPILE_FLAGS
             "-DLIBSSH_STATIC"
     )
   endif (WIN32)
-
-    if (WITH_STATIC_LIB)
-      install(TARGETS
-                ${LIBSSH_STATIC_LIBRARY}
-              DESTINATION
-                ${LIB_INSTALL_DIR}/${OUTPUT_SUFFIX}
-              COMPONENT
-                libraries)
-    endif (WITH_STATIC_LIB)
 endif (BUILD_STATIC_LIB)
 
 message(STATUS "Threads_FOUND=${Threads_FOUND}")

src/agent.c

@@ -196,7 +196,7 @@ void ssh_agent_close(struct ssh_agent_struct *agent) {
 void ssh_agent_free(ssh_agent agent) {
   if (agent) {
     if (agent->ident) {
-      ssh_buffer_free(agent->ident);
+      SSH_BUFFER_FREE(agent->ident);
     }
     if (agent->sock) {
       ssh_agent_close(agent);
@@ -307,90 +307,91 @@ static int agent_talk(struct ssh_session_struct *session,
   return 0;
 }
 
-int ssh_agent_get_ident_count(struct ssh_session_struct *session) {
-  ssh_buffer request = NULL;
-  ssh_buffer reply = NULL;
-  unsigned int type = 0;
-  uint32_t count = 0;
-  int rc;
+uint32_t ssh_agent_get_ident_count(struct ssh_session_struct *session)
+{
+    ssh_buffer request = NULL;
+    ssh_buffer reply = NULL;
+    unsigned int type = 0;
+    uint32_t count = 0;
+    int rc;
 
-  /* send message to the agent requesting the list of identities */
-  request = ssh_buffer_new();
-  if (request == NULL) {
-      ssh_set_error_oom(session);
-      return -1;
-  }
-  if (ssh_buffer_add_u8(request, SSH2_AGENTC_REQUEST_IDENTITIES) < 0) {
-      ssh_set_error_oom(session);
-      ssh_buffer_free(request);
-      return -1;
-  }
+    /* send message to the agent requesting the list of identities */
+    request = ssh_buffer_new();
+    if (request == NULL) {
+        ssh_set_error_oom(session);
+        return 0;
+    }
+    if (ssh_buffer_add_u8(request, SSH2_AGENTC_REQUEST_IDENTITIES) < 0) {
+        ssh_set_error_oom(session);
+        SSH_BUFFER_FREE(request);
+        return 0;
+    }
 
-  reply = ssh_buffer_new();
-  if (reply == NULL) {
-    ssh_buffer_free(request);
-    ssh_set_error(session, SSH_FATAL, "Not enough space");
-    return -1;
-  }
+    reply = ssh_buffer_new();
+    if (reply == NULL) {
+        SSH_BUFFER_FREE(request);
+        ssh_set_error(session, SSH_FATAL, "Not enough space");
+        return 0;
+    }
 
-  if (agent_talk(session, request, reply) < 0) {
-    ssh_buffer_free(request);
-    ssh_buffer_free(reply);
-    return 0;
-  }
-  ssh_buffer_free(request);
+    if (agent_talk(session, request, reply) < 0) {
+        SSH_BUFFER_FREE(request);
+        SSH_BUFFER_FREE(reply);
+        return 0;
+    }
+    SSH_BUFFER_FREE(request);
 
-  /* get message type and verify the answer */
-  rc = ssh_buffer_get_u8(reply, (uint8_t *) &type);
-  if (rc != sizeof(uint8_t)) {
-    ssh_set_error(session, SSH_FATAL,
-        "Bad authentication reply size: %d", rc);
-    ssh_buffer_free(reply);
-    return -1;
-  }
+    /* get message type and verify the answer */
+    rc = ssh_buffer_get_u8(reply, (uint8_t *) &type);
+    if (rc != sizeof(uint8_t)) {
+        ssh_set_error(session, SSH_FATAL,
+                "Bad authentication reply size: %d", rc);
+        SSH_BUFFER_FREE(reply);
+        return 0;
+    }
 #ifdef WORDS_BIGENDIAN
-  type = bswap_32(type);
+    type = bswap_32(type);
 #endif
 
-  SSH_LOG(SSH_LOG_WARN,
-      "Answer type: %d, expected answer: %d",
-      type, SSH2_AGENT_IDENTITIES_ANSWER);
+    SSH_LOG(SSH_LOG_WARN,
+            "Answer type: %d, expected answer: %d",
+            type, SSH2_AGENT_IDENTITIES_ANSWER);
 
-  if (agent_failed(type)) {
-      ssh_buffer_free(reply);
-      return 0;
-  } else if (type != SSH2_AGENT_IDENTITIES_ANSWER) {
-      ssh_set_error(session, SSH_FATAL,
-          "Bad authentication reply message type: %u", type);
-      ssh_buffer_free(reply);
-      return -1;
-  }
+    if (agent_failed(type)) {
+        SSH_BUFFER_FREE(reply);
+        return 0;
+    } else if (type != SSH2_AGENT_IDENTITIES_ANSWER) {
+        ssh_set_error(session, SSH_FATAL,
+                "Bad authentication reply message type: %u", type);
+        SSH_BUFFER_FREE(reply);
+        return 0;
+    }
 
-  rc = ssh_buffer_get_u32(reply, &count);
-  if (rc != 4) {
-      ssh_set_error(session,
-                    SSH_FATAL,
-                    "Failed to read count");
-      ssh_buffer_free(reply);
-      return -1;
-  }
-  session->agent->count = ntohl(count);
-  SSH_LOG(SSH_LOG_DEBUG, "Agent count: %d",
-      session->agent->count);
-  if (session->agent->count > 1024) {
-    ssh_set_error(session, SSH_FATAL,
-        "Too many identities in authentication reply: %d",
-        session->agent->count);
-    ssh_buffer_free(reply);
-    return -1;
-  }
+    rc = ssh_buffer_get_u32(reply, &count);
+    if (rc != 4) {
+        ssh_set_error(session,
+                SSH_FATAL,
+                "Failed to read count");
+        SSH_BUFFER_FREE(reply);
+        return 0;
+    }
+    session->agent->count = ntohl(count);
+    SSH_LOG(SSH_LOG_DEBUG, "Agent count: %d",
+            session->agent->count);
+    if (session->agent->count > 1024) {
+        ssh_set_error(session, SSH_FATAL,
+                "Too many identities in authentication reply: %d",
+                session->agent->count);
+        SSH_BUFFER_FREE(reply);
+        return 0;
+    }
 
-  if (session->agent->ident) {
-    ssh_buffer_reinit(session->agent->ident);
-  }
-  session->agent->ident = reply;
+    if (session->agent->ident) {
+        ssh_buffer_reinit(session->agent->ident);
+    }
+    session->agent->ident = reply;
 
-  return session->agent->count;
+    return session->agent->count;
 }
 
 /* caller has to free commment */
@@ -424,7 +425,7 @@ ssh_key ssh_agent_get_next_ident(struct ssh_session_struct *session,
     /* get the comment */
     tmp = ssh_buffer_get_ssh_string(session->agent->ident);
     if (tmp == NULL) {
-        ssh_string_free(blob);
+        SSH_STRING_FREE(blob);
 
         return NULL;
     }
@@ -432,12 +433,12 @@ ssh_key ssh_agent_get_next_ident(struct ssh_session_struct *session,
     if (comment) {
         *comment = ssh_string_to_char(tmp);
     } else {
-        ssh_string_free(blob);
-        ssh_string_free(tmp);
+        SSH_STRING_FREE(blob);
+        SSH_STRING_FREE(tmp);
 
         return NULL;
     }
-    ssh_string_free(tmp);
+    SSH_STRING_FREE(tmp);
 
     /* get key from blob */
     rc = ssh_pki_import_pubkey_blob(blob, &key);
@@ -445,7 +446,7 @@ ssh_key ssh_agent_get_next_ident(struct ssh_session_struct *session,
         /* Try again as a cert. */
         rc = ssh_pki_import_cert_blob(blob, &key);
     }
-    ssh_string_free(blob);
+    SSH_STRING_FREE(blob);
     if (rc == SSH_ERROR) {
         return NULL;
     }
@@ -491,13 +492,13 @@ ssh_string ssh_agent_sign_data(ssh_session session,
 
     /* create request */
     if (ssh_buffer_add_u8(request, SSH2_AGENTC_SIGN_REQUEST) < 0) {
-        ssh_buffer_free(request);
+        SSH_BUFFER_FREE(request);
         return NULL;
     }
 
     rc = ssh_pki_export_pubkey_blob(pubkey, &key_blob);
     if (rc < 0) {
-        ssh_buffer_free(request);
+        SSH_BUFFER_FREE(request);
         return NULL;
     }
 
@@ -512,26 +513,26 @@ ssh_string ssh_agent_sign_data(ssh_session session,
                                   sizeof(uint32_t) * 2 +
                                   ssh_string_len(key_blob));
     if (rc < 0) {
-        ssh_buffer_free(request);
+        SSH_BUFFER_FREE(request);
         return NULL;
     }
 
     /* adds len + blob */
     rc = ssh_buffer_add_ssh_string(request, key_blob);
-    ssh_string_free(key_blob);
+    SSH_STRING_FREE(key_blob);
     if (rc < 0) {
-        ssh_buffer_free(request);
+        SSH_BUFFER_FREE(request);
         return NULL;
     }
 
     /* Add data */
     dlen = ssh_buffer_get_len(data);
     if (ssh_buffer_add_u32(request, htonl(dlen)) < 0) {
-        ssh_buffer_free(request);
+        SSH_BUFFER_FREE(request);
         return NULL;
     }
     if (ssh_buffer_add_data(request, ssh_buffer_get(data), dlen) < 0) {
-        ssh_buffer_free(request);
+        SSH_BUFFER_FREE(request);
         return NULL;
     }
 
@@ -544,27 +545,27 @@ ssh_string ssh_agent_sign_data(ssh_session session,
         }
     }
     if (ssh_buffer_add_u32(request, htonl(flags)) < 0) {
-        ssh_buffer_free(request);
+        SSH_BUFFER_FREE(request);
         return NULL;
     }
 
     reply = ssh_buffer_new();
     if (reply == NULL) {
-        ssh_buffer_free(request);
+        SSH_BUFFER_FREE(request);
         return NULL;
     }
 
     /* send the request */
     if (agent_talk(session, request, reply) < 0) {
-        ssh_buffer_free(request);
-        ssh_buffer_free(reply);
+        SSH_BUFFER_FREE(request);
+        SSH_BUFFER_FREE(reply);
         return NULL;
     }
-    ssh_buffer_free(request);
+    SSH_BUFFER_FREE(request);
 
     /* check if reply is valid */
     if (ssh_buffer_get_u8(reply, (uint8_t *) &type) != sizeof(uint8_t)) {
-        ssh_buffer_free(reply);
+        SSH_BUFFER_FREE(reply);
         return NULL;
     }
 #ifdef WORDS_BIGENDIAN
@@ -573,19 +574,19 @@ ssh_string ssh_agent_sign_data(ssh_session session,
 
     if (agent_failed(type)) {
         SSH_LOG(SSH_LOG_WARN, "Agent reports failure in signing the key");
-        ssh_buffer_free(reply);
+        SSH_BUFFER_FREE(reply);
         return NULL;
     } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
         ssh_set_error(session,
                       SSH_FATAL,
                       "Bad authentication response: %u",
                       type);
-        ssh_buffer_free(reply);
+        SSH_BUFFER_FREE(reply);
         return NULL;
     }
 
     sig_blob = ssh_buffer_get_ssh_string(reply);
-    ssh_buffer_free(reply);
+    SSH_BUFFER_FREE(reply);
 
     return sig_blob;
 }

src/auth.c

@@ -25,6 +25,7 @@
 #include "config.h"
 
 #include <stdio.h>
+#include <string.h>
 
 #ifndef _WIN32
 #include <netinet/in.h>
@@ -69,7 +70,7 @@ static int ssh_userauth_request_service(ssh_session session) {
     int rc;
 
     rc = ssh_service_request(session, "ssh-userauth");
-    if (rc != SSH_OK) {
+    if ((rc != SSH_OK) && (rc != SSH_AGAIN)) {
         SSH_LOG(SSH_LOG_WARN,
                 "Failed to request \"ssh-userauth\" service");
     }
@@ -204,7 +205,7 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_banner) {
         SSH_LOG(SSH_LOG_DEBUG,
                 "Received SSH_USERAUTH_BANNER packet");
         if (session->banner != NULL)
-            ssh_string_free(session->banner);
+            SSH_STRING_FREE(session->banner);
         session->banner = banner;
     }
 
@@ -557,7 +558,7 @@ int ssh_userauth_try_publickey(ssh_session session,
         goto fail;
     }
 
-    ssh_string_free(pubkey_s);
+    SSH_STRING_FREE(pubkey_s);
 
     session->auth.current_method = SSH_AUTH_METHOD_PUBLICKEY;
     session->auth.state = SSH_AUTH_STATE_PUBKEY_OFFER_SENT;
@@ -575,7 +576,7 @@ pending:
 
     return rc;
 fail:
-    ssh_string_free(pubkey_s);
+    SSH_STRING_FREE(pubkey_s);
     ssh_set_error_oom(session);
     ssh_buffer_reinit(session->out_buffer);
 
@@ -680,7 +681,7 @@ int ssh_userauth_publickey(ssh_session session,
     if (rc < 0) {
         goto fail;
     }
-    ssh_string_free(str);
+    SSH_STRING_FREE(str);
 
     /* Get the hash type to be used in the signature based on the key type */
     hash_type = ssh_key_type_to_hash(session, privkey->type);
@@ -692,7 +693,7 @@ int ssh_userauth_publickey(ssh_session session,
     }
 
     rc = ssh_buffer_add_ssh_string(session->out_buffer, str);
-    ssh_string_free(str);
+    SSH_STRING_FREE(str);
     str = NULL;
     if (rc < 0) {
         goto fail;
@@ -714,7 +715,7 @@ pending:
 
     return rc;
 fail:
-    ssh_string_free(str);
+    SSH_STRING_FREE(str);
     ssh_set_error_oom(session);
     ssh_buffer_reinit(session->out_buffer);
 
@@ -840,7 +841,7 @@ void ssh_agent_state_free(void *data) {
     struct ssh_agent_state_struct *state = data;
 
     if (state) {
-        ssh_string_free_char(state->comment);
+        SSH_STRING_FREE_CHAR(state->comment);
         ssh_key_free(state->pubkey);
         free (state);
     }
@@ -918,7 +919,7 @@ int ssh_userauth_agent(ssh_session session,
             } else if (rc != SSH_AUTH_SUCCESS) {
                 SSH_LOG(SSH_LOG_DEBUG,
                         "Public key of %s refused by server", state->comment);
-                ssh_string_free_char(state->comment);
+                SSH_STRING_FREE_CHAR(state->comment);
                 state->comment = NULL;
                 ssh_key_free(state->pubkey);
                 state->pubkey = ssh_agent_get_next_ident(session, &state->comment);
@@ -934,7 +935,7 @@ int ssh_userauth_agent(ssh_session session,
             rc = ssh_userauth_agent_publickey(session, username, state->pubkey);
             if (rc == SSH_AUTH_AGAIN)
                 return rc;
-            ssh_string_free_char(state->comment);
+            SSH_STRING_FREE_CHAR(state->comment);
             state->comment = NULL;
             if (rc == SSH_AUTH_ERROR || rc == SSH_AUTH_PARTIAL) {
                 ssh_agent_state_free (session->agent_state);
@@ -1030,6 +1031,9 @@ int ssh_userauth_publickey_auto(ssh_session session,
             ssh_set_error_oom(session);
             return SSH_AUTH_ERROR;
         }
+
+        /* Set state explicitly */
+        session->auth.auto_state->state = SSH_AUTH_AUTO_STATE_NONE;
     }
     state = session->auth.auto_state;
     if (state->state == SSH_AUTH_AUTO_STATE_NONE) {
@@ -1329,7 +1333,7 @@ ssh_kbdint ssh_kbdint_new(void) {
 
 
 void ssh_kbdint_free(ssh_kbdint kbd) {
-    int i, n;
+    size_t i, n;
 
     if (kbd == NULL) {
         return;
@@ -1365,7 +1369,7 @@ void ssh_kbdint_free(ssh_kbdint kbd) {
 }
 
 void ssh_kbdint_clean(ssh_kbdint kbd) {
-    int i, n;
+    size_t i, n;
 
     if (kbd == NULL) {
         return;
@@ -1554,7 +1558,7 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_info_request) {
             );
 
     /* We don't care about tmp */
-    ssh_string_free(tmp);
+    SSH_STRING_FREE(tmp);
 
     if (rc != SSH_OK) {
         ssh_set_error(session, SSH_FATAL, "Invalid USERAUTH_INFO_REQUEST msg");
@@ -1778,7 +1782,7 @@ const char *ssh_userauth_kbdint_getprompt(ssh_session session, unsigned int i,
     }
 
     if (echo) {
-        *echo = session->kbdint->echo[i];
+        *echo = (char)session->kbdint->echo[i];
     }
 
     return session->kbdint->prompts[i];

src/base64.c

@@ -29,7 +29,8 @@
 #include "libssh/priv.h"
 #include "libssh/buffer.h"
 
-static char alphabet[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+static
+const uint8_t alphabet[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
                          "abcdefghijklmnopqrstuvwxyz"
                          "0123456789+/";
 
@@ -167,19 +168,19 @@ ssh_buffer base64_to_bin(const char *source) {
 
 error:
   SAFE_FREE(base64);
-  ssh_buffer_free(buffer);
+  SSH_BUFFER_FREE(buffer);
   return NULL;
 }
 
-#define BLOCK(letter, n) do {ptr = strchr(alphabet, source[n]); \
+#define BLOCK(letter, n) do {ptr = strchr((const char *)alphabet, source[n]); \
                              if(!ptr) return -1; \
-                             i = ptr - alphabet; \
+                             i = ptr - (const char *)alphabet; \
                              SET_##letter(*block, i); \
                          } while(0)
 
 /* Returns 0 if ok, -1 if not (ie invalid char into the stuff) */
 static int to_block4(unsigned long *block, const char *source, int num) {
-  char *ptr;
+  const char *ptr = NULL;
   unsigned int i;
 
   *block = 0;
@@ -234,29 +235,32 @@ static int get_equals(char *string) {
 }
 
 /* thanks sysk for debugging my mess :) */
+static void _bin_to_base64(uint8_t *dest,
+                           const uint8_t source[3],
+                           size_t len)
+{
 #define BITS(n) ((1 << (n)) - 1)
-static void _bin_to_base64(unsigned char *dest, const unsigned char source[3],
-    int len) {
-  switch (len) {
-    case 1:
-      dest[0] = alphabet[(source[0] >> 2)];
-      dest[1] = alphabet[((source[0] & BITS(2)) << 4)];
-      dest[2] = '=';
-      dest[3] = '=';
-      break;
-    case 2:
-      dest[0] = alphabet[source[0] >> 2];
-      dest[1] = alphabet[(source[1] >> 4) | ((source[0] & BITS(2)) << 4)];
-      dest[2] = alphabet[(source[1] & BITS(4)) << 2];
-      dest[3] = '=';
-      break;
-    case 3:
-      dest[0] = alphabet[(source[0] >> 2)];
-      dest[1] = alphabet[(source[1] >> 4) | ((source[0] & BITS(2)) << 4)];
-      dest[2] = alphabet[ (source[2] >> 6) | (source[1] & BITS(4)) << 2];
-      dest[3] = alphabet[source[2] & BITS(6)];
-      break;
-  }
+    switch (len) {
+        case 1:
+            dest[0] = alphabet[(source[0] >> 2)];
+            dest[1] = alphabet[((source[0] & BITS(2)) << 4)];
+            dest[2] = '=';
+            dest[3] = '=';
+            break;
+        case 2:
+            dest[0] = alphabet[source[0] >> 2];
+            dest[1] = alphabet[(source[1] >> 4) | ((source[0] & BITS(2)) << 4)];
+            dest[2] = alphabet[(source[1] & BITS(4)) << 2];
+            dest[3] = '=';
+            break;
+        case 3:
+            dest[0] = alphabet[(source[0] >> 2)];
+            dest[1] = alphabet[(source[1] >> 4) | ((source[0] & BITS(2)) << 4)];
+            dest[2] = alphabet[(source[2] >> 6) | (source[1] & BITS(4)) << 2];
+            dest[3] = alphabet[source[2] & BITS(6)];
+            break;
+    }
+#undef BITS
 }
 
 /**
@@ -266,25 +270,29 @@ static void _bin_to_base64(unsigned char *dest, const unsigned char source[3],
  *
  * @returns the converted string
  */
-unsigned char *bin_to_base64(const unsigned char *source, int len) {
-  unsigned char *base64;
-  unsigned char *ptr;
-  int flen = len + (3 - (len % 3)); /* round to upper 3 multiple */
-  flen = (4 * flen) / 3 + 1;
+uint8_t *bin_to_base64(const uint8_t *source, size_t len)
+{
+    uint8_t *base64 = NULL;
+    uint8_t *ptr = NULL;
+    size_t flen = len + (3 - (len % 3)); /* round to upper 3 multiple */
+    flen = (4 * flen) / 3 + 1;
 
-  base64 = malloc(flen);
-  if (base64 == NULL) {
-    return NULL;
-  }
-  ptr = base64;
+    base64 = malloc(flen);
+    if (base64 == NULL) {
+        return NULL;
+    }
+    ptr = base64;
 
-  while(len > 0){
-    _bin_to_base64(ptr, source, len > 3 ? 3 : len);
-    ptr += 4;
-    source += 3;
-    len -= 3;
-  }
-  ptr[0] = '\0';
+    while(len > 0){
+        _bin_to_base64(ptr, source, len > 3 ? 3 : len);
+        ptr += 4;
+        if (len < 3) {
+            break;
+        }
+        source += 3;
+        len -= 3;
+    }
+    ptr[0] = '\0';
 
-  return base64;
+    return base64;
 }

src/bignum.c

@@ -29,9 +29,9 @@
 
 ssh_string ssh_make_bignum_string(bignum num) {
   ssh_string ptr = NULL;
-  int pad = 0;
-  unsigned int len = bignum_num_bytes(num);
-  unsigned int bits = bignum_num_bits(num);
+  size_t pad = 0;
+  size_t len = bignum_num_bytes(num);
+  size_t bits = bignum_num_bits(num);
 
   if (len == 0) {
       return NULL;
@@ -43,7 +43,9 @@ ssh_string ssh_make_bignum_string(bignum num) {
   }
 
 #ifdef DEBUG_CRYPTO
-  fprintf(stderr, "%d bits, %d bytes, %d padding\n", bits, len, pad);
+  SSH_LOG(SSH_LOG_TRACE,
+          "%zu bits, %zu bytes, %zu padding\n",
+          bits, len, pad);
 #endif /* DEBUG_CRYPTO */
 
   ptr = ssh_string_new(len + pad);
@@ -67,7 +69,8 @@ bignum ssh_make_string_bn(ssh_string string)
     size_t len = ssh_string_len(string);
 
 #ifdef DEBUG_CRYPTO
-    fprintf(stderr, "Importing a %zu bits, %zu bytes object ...\n",
+    SSH_LOG(SSH_LOG_TRACE,
+            "Importing a %zu bits, %zu bytes object ...\n",
             len * 8, len);
 #endif /* DEBUG_CRYPTO */
 
@@ -77,7 +80,7 @@ bignum ssh_make_string_bn(ssh_string string)
 }
 
 /* prints the bignum on stderr */
-void ssh_print_bignum(const char *name, const bignum num)
+void ssh_print_bignum(const char *name, const_bignum num)
 {
     unsigned char *hex = NULL;
     if (num != NULL) {

src/bind.c

@@ -411,7 +411,7 @@ void ssh_bind_free(ssh_bind sshbind){
   ssh_key_free(sshbind->ed25519);
   sshbind->ed25519 = NULL;
 
-  for (i = 0; i < 10; i++) {
+  for (i = 0; i < SSH_KEX_METHODS; i++) {
     if (sshbind->wanted_methods[i]) {
       SAFE_FREE(sshbind->wanted_methods[i]);
     }
@@ -442,7 +442,7 @@ int ssh_bind_accept_fd(ssh_bind sshbind, ssh_session session, socket_t fd){
     session->server = 1;
 
     /* Copy options from bind to session */
-    for (i = 0; i < 10; i++) {
+    for (i = 0; i < SSH_KEX_METHODS; i++) {
       if (sshbind->wanted_methods[i]) {
         session->opts.wanted_methods[i] = strdup(sshbind->wanted_methods[i]);
         if (session->opts.wanted_methods[i] == NULL) {

src/buffer.c

@@ -1119,6 +1119,7 @@ int ssh_buffer_unpack_va(struct ssh_buffer_struct *buffer,
             goto cleanup;
         }
 
+        rc = SSH_ERROR;
         switch (*p) {
         case 'b':
             o.byte = va_arg(ap, uint8_t *);
@@ -1128,27 +1129,32 @@ int ssh_buffer_unpack_va(struct ssh_buffer_struct *buffer,
         case 'w':
             o.word = va_arg(ap,  uint16_t *);
             rlen = ssh_buffer_get_data(buffer, o.word, sizeof(uint16_t));
-            *o.word = ntohs(*o.word);
-            rc = rlen==2 ? SSH_OK : SSH_ERROR;
+            if (rlen == 2) {
+                *o.word = ntohs(*o.word);
+                rc = SSH_OK;
+            }
             break;
         case 'd':
             o.dword = va_arg(ap, uint32_t *);
             rlen = ssh_buffer_get_u32(buffer, o.dword);
-            *o.dword = ntohl(*o.dword);
-            rc = rlen==4 ? SSH_OK : SSH_ERROR;
+            if (rlen == 4) {
+                *o.dword = ntohl(*o.dword);
+                rc = SSH_OK;
+            }
             break;
         case 'q':
             o.qword = va_arg(ap, uint64_t*);
             rlen = ssh_buffer_get_u64(buffer, o.qword);
-            *o.qword = ntohll(*o.qword);
-            rc = rlen==8 ? SSH_OK : SSH_ERROR;
+            if (rlen == 8) {
+                *o.qword = ntohll(*o.qword);
+                rc = SSH_OK;
+            }
             break;
         case 'B':
             o.bignum = va_arg(ap, bignum *);
             *o.bignum = NULL;
             tmp_string = ssh_buffer_get_ssh_string(buffer);
             if (tmp_string == NULL) {
-                rc = SSH_ERROR;
                 break;
             }
             *o.bignum = ssh_make_string_bn(tmp_string);
@@ -1167,14 +1173,12 @@ int ssh_buffer_unpack_va(struct ssh_buffer_struct *buffer,
 
             o.cstring = va_arg(ap, char **);
             *o.cstring = NULL;
-            rc = ssh_buffer_get_u32(buffer, &u32len);
-            if (rc != 4){
-                rc = SSH_ERROR;
+            rlen = ssh_buffer_get_u32(buffer, &u32len);
+            if (rlen != 4){
                 break;
             }
             len = ntohl(u32len);
             if (len > max_len - 1) {
-                rc = SSH_ERROR;
                 break;
             }
 
@@ -1230,7 +1234,6 @@ int ssh_buffer_unpack_va(struct ssh_buffer_struct *buffer,
             break;
         default:
             SSH_LOG(SSH_LOG_WARN, "Invalid buffer format %c", *p);
-            rc = SSH_ERROR;
         }
         if (rc != SSH_OK) {
             break;

src/chachapoly.c

@@ -109,11 +109,11 @@ static void chacha20_poly1305_aead_encrypt(struct ssh_cipher_struct *cipher,
                          out_packet->payload,
                          len - sizeof(uint32_t));
 
-    /* ssh_print_hexa("poly1305_ctx", poly1305_ctx, sizeof(poly1305_ctx)); */
+    /* ssh_log_hexdump("poly1305_ctx", poly1305_ctx, sizeof(poly1305_ctx)); */
     /* step 4, compute the MAC */
     poly1305_auth(tag, (uint8_t *)out_packet, len, poly1305_ctx);
-    /* ssh_print_hexa("poly1305 src", (uint8_t *)out_packet, len);
-    ssh_print_hexa("poly1305 tag", tag, POLY1305_TAGLEN); */
+    /* ssh_log_hexdump("poly1305 src", (uint8_t *)out_packet, len);
+    ssh_log_hexdump("poly1305 tag", tag, POLY1305_TAGLEN); */
 }
 
 static int chacha20_poly1305_aead_decrypt_length(
@@ -159,17 +159,17 @@ static int chacha20_poly1305_aead_decrypt(struct ssh_cipher_struct *cipher,
                          poly1305_ctx,
                          POLY1305_KEYLEN);
 #if 0
-    ssh_print_hexa("poly1305_ctx", poly1305_ctx, sizeof(poly1305_ctx));
+    ssh_log_hexdump("poly1305_ctx", poly1305_ctx, sizeof(poly1305_ctx));
 #endif
 
     poly1305_auth(tag, (uint8_t *)complete_packet, encrypted_size +
             sizeof(uint32_t), poly1305_ctx);
 #if 0
-    ssh_print_hexa("poly1305 src",
+    ssh_log_hexdump("poly1305 src",
                    (uint8_t*)complete_packet,
                    encrypted_size + 4);
-    ssh_print_hexa("poly1305 tag", tag, POLY1305_TAGLEN);
-    ssh_print_hexa("received tag", mac, POLY1305_TAGLEN);
+    ssh_log_hexdump("poly1305 tag", tag, POLY1305_TAGLEN);
+    ssh_log_hexdump("received tag", mac, POLY1305_TAGLEN);
 #endif
 
     cmp = memcmp(tag, mac, POLY1305_TAGLEN);

src/channels.c

@@ -106,7 +106,7 @@ ssh_channel ssh_channel_new(ssh_session session)
     channel->stderr_buffer = ssh_buffer_new();
     if (channel->stderr_buffer == NULL) {
         ssh_set_error_oom(session);
-        ssh_buffer_free(channel->stdout_buffer);
+        SSH_BUFFER_FREE(channel->stdout_buffer);
         SAFE_FREE(channel);
         return NULL;
     }
@@ -121,6 +121,10 @@ ssh_channel ssh_channel_new(ssh_session session)
 
     ssh_list_prepend(session->channels, channel);
 
+    /* Set states explicitly */
+    channel->state = SSH_CHANNEL_STATE_NOT_OPEN;
+    channel->request_state = SSH_CHANNEL_REQ_STATE_NONE;
+
     return channel;
 }
 
@@ -277,74 +281,89 @@ static int ssh_channel_open_termination(void *c){
  *
  * @return             SSH_OK if successful; SSH_ERROR otherwise.
  */
-static int channel_open(ssh_channel channel, const char *type, int window,
-    int maxpacket, ssh_buffer payload) {
-  ssh_session session = channel->session;
-  int err=SSH_ERROR;
-  int rc;
+static int
+channel_open(ssh_channel channel,
+             const char *type,
+             uint32_t window,
+             uint32_t maxpacket,
+             ssh_buffer payload)
+{
+    ssh_session session = channel->session;
+    int err = SSH_ERROR;
+    int rc;
 
-  switch(channel->state){
-  case SSH_CHANNEL_STATE_NOT_OPEN:
-    break;
-  case SSH_CHANNEL_STATE_OPENING:
-    goto pending;
-  case SSH_CHANNEL_STATE_OPEN:
-  case SSH_CHANNEL_STATE_CLOSED:
-  case SSH_CHANNEL_STATE_OPEN_DENIED:
-    goto end;
-  default:
-    ssh_set_error(session,SSH_FATAL,"Bad state in channel_open: %d",channel->state);
-  }
-  channel->local_channel = ssh_channel_new_id(session);
-  channel->local_maxpacket = maxpacket;
-  channel->local_window = window;
-
-  SSH_LOG(SSH_LOG_PROTOCOL,
-      "Creating a channel %d with %d window and %d max packet",
-      channel->local_channel, window, maxpacket);
-
-  rc = ssh_buffer_pack(session->out_buffer,
-                       "bsddd",
-                       SSH2_MSG_CHANNEL_OPEN,
-                       type,
-                       channel->local_channel,
-                       channel->local_window,
-                       channel->local_maxpacket);
-  if (rc != SSH_OK){
-    ssh_set_error_oom(session);
-    return err;
-  }
-
-  if (payload != NULL) {
-    if (ssh_buffer_add_buffer(session->out_buffer, payload) < 0) {
-      ssh_set_error_oom(session);
-
-      return err;
+    switch (channel->state) {
+    case SSH_CHANNEL_STATE_NOT_OPEN:
+        break;
+    case SSH_CHANNEL_STATE_OPENING:
+        goto pending;
+    case SSH_CHANNEL_STATE_OPEN:
+    case SSH_CHANNEL_STATE_CLOSED:
+    case SSH_CHANNEL_STATE_OPEN_DENIED:
+        goto end;
+    default:
+        ssh_set_error(session, SSH_FATAL, "Bad state in channel_open: %d",
+                      channel->state);
+    }
+
+    channel->local_channel = ssh_channel_new_id(session);
+    channel->local_maxpacket = maxpacket;
+    channel->local_window = window;
+
+    SSH_LOG(SSH_LOG_PROTOCOL,
+            "Creating a channel %d with %d window and %d max packet",
+            channel->local_channel, window, maxpacket);
+
+    rc = ssh_buffer_pack(session->out_buffer,
+                         "bsddd",
+                         SSH2_MSG_CHANNEL_OPEN,
+                         type,
+                         channel->local_channel,
+                         channel->local_window,
+                         channel->local_maxpacket);
+    if (rc != SSH_OK) {
+        ssh_set_error_oom(session);
+        return err;
+    }
+
+    if (payload != NULL) {
+        if (ssh_buffer_add_buffer(session->out_buffer, payload) < 0) {
+            ssh_set_error_oom(session);
+
+            return err;
+        }
+    }
+    channel->state = SSH_CHANNEL_STATE_OPENING;
+    if (ssh_packet_send(session) == SSH_ERROR) {
+        return err;
+    }
+
+    SSH_LOG(SSH_LOG_PACKET,
+            "Sent a SSH_MSG_CHANNEL_OPEN type %s for channel %d",
+            type, channel->local_channel);
+
+pending:
+    /* wait until channel is opened by server */
+    err = ssh_handle_packets_termination(session,
+                                         SSH_TIMEOUT_DEFAULT,
+                                         ssh_channel_open_termination,
+                                         channel);
+
+    if (session->session_state == SSH_SESSION_STATE_ERROR) {
+        err = SSH_ERROR;
+    }
+
+end:
+    /* This needs to pass the SSH_AGAIN from the above,
+     * but needs to catch failed channel states */
+    if (channel->state == SSH_CHANNEL_STATE_OPEN) {
+        err = SSH_OK;
+    } else if (err != SSH_AGAIN) {
+        /* Messages were handled correctly, but he channel state is invalid */
+        err = SSH_ERROR;
     }
-  }
-  channel->state = SSH_CHANNEL_STATE_OPENING;
-  if (ssh_packet_send(session) == SSH_ERROR) {
 
     return err;
-  }
-
-  SSH_LOG(SSH_LOG_PACKET,
-      "Sent a SSH_MSG_CHANNEL_OPEN type %s for channel %d",
-      type, channel->local_channel);
-pending:
-  /* wait until channel is opened by server */
-  err = ssh_handle_packets_termination(session,
-                                       SSH_TIMEOUT_DEFAULT,
-                                       ssh_channel_open_termination,
-                                       channel);
-
-  if (session->session_state == SSH_SESSION_STATE_ERROR)
-    err = SSH_ERROR;
-end:
-  if(channel->state == SSH_CHANNEL_STATE_OPEN)
-    err=SSH_OK;
-
-  return err;
 }
 
 /* return channel with corresponding local id, or NULL if not found */
@@ -373,7 +392,10 @@ ssh_channel ssh_channel_from_local(ssh_session session, uint32_t id) {
  * @param minimumsize The minimum acceptable size for the new window.
  * @return            SSH_OK if successful; SSH_ERROR otherwise.
  */
-static int grow_window(ssh_session session, ssh_channel channel, int minimumsize) {
+static int grow_window(ssh_session session,
+                       ssh_channel channel,
+                       uint32_t minimumsize)
+{
   uint32_t new_window = minimumsize > WINDOWBASE ? minimumsize : WINDOWBASE;
   int rc;
 
@@ -538,7 +560,7 @@ SSH_PACKET_CALLBACK(channel_rcv_data){
 
   if (channel_default_bufferize(channel, ssh_string_data(str), len,
         is_stderr) < 0) {
-    ssh_string_free(str);
+    SSH_STRING_FREE(str);
 
     return SSH_PACKET_USED;
   }
@@ -554,7 +576,7 @@ SSH_PACKET_CALLBACK(channel_rcv_data){
       channel->local_window,
       channel->remote_window);
 
-  ssh_string_free(str);
+  SSH_STRING_FREE(str);
 
   if (is_stderr) {
       buf = channel->stderr_buffer;
@@ -822,8 +844,10 @@ SSH_PACKET_CALLBACK(channel_rcv_request) {
  *
  * FIXME is the window changed?
  */
-int channel_default_bufferize(ssh_channel channel, void *data, int len,
-    int is_stderr) {
+int channel_default_bufferize(ssh_channel channel,
+                              void *data, size_t len,
+                              bool is_stderr)
+{
   ssh_session session;
 
   if(channel == NULL) {
@@ -838,8 +862,10 @@ int channel_default_bufferize(ssh_channel channel, void *data, int len,
   }
 
   SSH_LOG(SSH_LOG_PACKET,
-      "placing %d bytes into channel buffer (stderr=%d)", len, is_stderr);
-  if (is_stderr == 0) {
+          "placing %zu bytes into channel buffer (%s)",
+          len,
+          is_stderr ? "stderr" : "stdout");
+  if (!is_stderr) {
     /* stdout */
     if (channel->stdout_buffer == NULL) {
       channel->stdout_buffer = ssh_buffer_new();
@@ -851,7 +877,7 @@ int channel_default_bufferize(ssh_channel channel, void *data, int len,
 
     if (ssh_buffer_add_data(channel->stdout_buffer, data, len) < 0) {
       ssh_set_error_oom(session);
-      ssh_buffer_free(channel->stdout_buffer);
+      SSH_BUFFER_FREE(channel->stdout_buffer);
       channel->stdout_buffer = NULL;
       return -1;
     }
@@ -867,7 +893,7 @@ int channel_default_bufferize(ssh_channel channel, void *data, int len,
 
     if (ssh_buffer_add_data(channel->stderr_buffer, data, len) < 0) {
       ssh_set_error_oom(session);
-      ssh_buffer_free(channel->stderr_buffer);
+      SSH_BUFFER_FREE(channel->stderr_buffer);
       channel->stderr_buffer = NULL;
       return -1;
     }
@@ -998,8 +1024,8 @@ int ssh_channel_open_forward(ssh_channel channel, const char *remotehost,
                     payload);
 
 error:
-  ssh_buffer_free(payload);
-  ssh_string_free(str);
+  SSH_BUFFER_FREE(payload);
+  SSH_STRING_FREE(str);
 
   return rc;
 }
@@ -1081,8 +1107,8 @@ int ssh_channel_open_forward_unix(ssh_channel channel,
                       payload);
 
 error:
-    ssh_buffer_free(payload);
-    ssh_string_free(str);
+    SSH_BUFFER_FREE(payload);
+    SSH_STRING_FREE(str);
 
     return rc;
 }
@@ -1815,7 +1841,7 @@ int ssh_channel_request_pty_size(ssh_channel channel, const char *terminal,
 pending:
   rc = channel_request(channel, "pty-req", buffer, 1);
 error:
-  ssh_buffer_free(buffer);
+  SSH_BUFFER_FREE(buffer);
 
   return rc;
 }
@@ -1875,7 +1901,7 @@ int ssh_channel_change_pty_size(ssh_channel channel, int cols, int rows) {
 
   rc = channel_request(channel, "window-change", buffer, 0);
 error:
-  ssh_buffer_free(buffer);
+  SSH_BUFFER_FREE(buffer);
 
   return rc;
 }
@@ -1944,11 +1970,23 @@ int ssh_channel_request_subsystem(ssh_channel channel, const char *subsys) {
 pending:
   rc = channel_request(channel, "subsystem", buffer, 1);
 error:
-  ssh_buffer_free(buffer);
+  SSH_BUFFER_FREE(buffer);
 
   return rc;
 }
 
+/**
+ * @brief Request sftp subsystem on the channel
+ *
+ * @param[in]  channel The channel to request the sftp subsystem.
+ *
+ * @return              SSH_OK on success,
+ *                      SSH_ERROR if an error occurred,
+ *                      SSH_AGAIN if in nonblocking mode and call has
+ *                      to be done again.
+ *
+ * @note You should use sftp_new() which does this for you.
+ */
 int ssh_channel_request_sftp( ssh_channel channel){
     if(channel == NULL) {
         return SSH_ERROR;
@@ -2048,7 +2086,7 @@ pending:
   rc = channel_request(channel, "x11-req", buffer, 1);
 
 error:
-  ssh_buffer_free(buffer);
+  SSH_BUFFER_FREE(buffer);
   return rc;
 }
 
@@ -2361,7 +2399,7 @@ pending:
   }
 
 error:
-  ssh_buffer_free(buffer);
+  SSH_BUFFER_FREE(buffer);
   return rc;
 }
 
@@ -2433,7 +2471,7 @@ pending:
   rc = ssh_global_request(session, "cancel-tcpip-forward", buffer, 1);
 
 error:
-  ssh_buffer_free(buffer);
+  SSH_BUFFER_FREE(buffer);
   return rc;
 }
 
@@ -2491,7 +2529,7 @@ int ssh_channel_request_env(ssh_channel channel, const char *name, const char *v
 pending:
   rc = channel_request(channel, "env", buffer,1);
 error:
-  ssh_buffer_free(buffer);
+  SSH_BUFFER_FREE(buffer);
 
   return rc;
 }
@@ -2513,12 +2551,12 @@ error:
  *
  * Example:
 @code
-   rc = channel_request_exec(channel, "ps aux");
+   rc = ssh_channel_request_exec(channel, "ps aux");
    if (rc > 0) {
        return -1;
    }
 
-   while ((rc = channel_read(channel, buffer, sizeof(buffer), 0)) > 0) {
+   while ((rc = ssh_channel_read(channel, buffer, sizeof(buffer), 0)) > 0) {
        if (fwrite(buffer, 1, rc, stdout) != (unsigned int) rc) {
            return -1;
        }
@@ -2560,7 +2598,7 @@ int ssh_channel_request_exec(ssh_channel channel, const char *cmd) {
 pending:
   rc = channel_request(channel, "exec", buffer, 1);
 error:
-  ssh_buffer_free(buffer);
+  SSH_BUFFER_FREE(buffer);
   return rc;
 }
 
@@ -2623,7 +2661,7 @@ int ssh_channel_request_send_signal(ssh_channel channel, const char *sig) {
 
   rc = channel_request(channel, "signal", buffer, 0);
 error:
-  ssh_buffer_free(buffer);
+  SSH_BUFFER_FREE(buffer);
   return rc;
 }
 
@@ -2666,7 +2704,7 @@ int ssh_channel_request_send_break(ssh_channel channel, uint32_t length) {
     rc = channel_request(channel, "break", buffer, 0);
 
 error:
-    ssh_buffer_free(buffer);
+    SSH_BUFFER_FREE(buffer);
     return rc;
 }
 
@@ -2942,42 +2980,45 @@ int ssh_channel_read_timeout(ssh_channel channel,
  *
  * @see ssh_channel_is_eof()
  */
-int ssh_channel_read_nonblocking(ssh_channel channel, void *dest, uint32_t count,
-    int is_stderr) {
-  ssh_session session;
-  int to_read;
-  int rc;
-  int blocking;
+int ssh_channel_read_nonblocking(ssh_channel channel,
+                                 void *dest,
+                                 uint32_t count,
+                                 int is_stderr)
+{
+    ssh_session session;
+    ssize_t to_read;
+    int rc;
+    int blocking;
 
-  if(channel == NULL) {
-      return SSH_ERROR;
-  }
-  if(dest == NULL) {
-      ssh_set_error_invalid(channel->session);
-      return SSH_ERROR;
-  }
+    if(channel == NULL) {
+        return SSH_ERROR;
+    }
+    if(dest == NULL) {
+        ssh_set_error_invalid(channel->session);
+        return SSH_ERROR;
+    }
 
-  session = channel->session;
+    session = channel->session;
 
-  to_read = ssh_channel_poll(channel, is_stderr);
+    to_read = ssh_channel_poll(channel, is_stderr);
 
-  if (to_read <= 0) {
-      if (session->session_state == SSH_SESSION_STATE_ERROR){
-          return SSH_ERROR;
-      }
+    if (to_read <= 0) {
+        if (session->session_state == SSH_SESSION_STATE_ERROR){
+            return SSH_ERROR;
+        }
 
-      return to_read; /* may be an error code */
-  }
+        return to_read; /* may be an error code */
+    }
 
-  if (to_read > (int)count) {
-    to_read = (int)count;
-  }
-  blocking = ssh_is_blocking(session);
-  ssh_set_blocking(session, 0);
-  rc = ssh_channel_read(channel, dest, to_read, is_stderr);
-  ssh_set_blocking(session,blocking);
+    if ((size_t)to_read > count) {
+        to_read = (ssize_t)count;
+    }
+    blocking = ssh_is_blocking(session);
+    ssh_set_blocking(session, 0);
+    rc = ssh_channel_read(channel, dest, (uint32_t)to_read, is_stderr);
+    ssh_set_blocking(session,blocking);
 
-  return rc;
+    return rc;
 }
 
 /**
@@ -3046,38 +3087,46 @@ int ssh_channel_poll(ssh_channel channel, int is_stderr){
  *
  * @see ssh_channel_is_eof()
  */
-int ssh_channel_poll_timeout(ssh_channel channel, int timeout, int is_stderr){
-  ssh_session session;
-  ssh_buffer stdbuf;
-  struct ssh_channel_read_termination_struct ctx;
-  int rc;
+int ssh_channel_poll_timeout(ssh_channel channel, int timeout, int is_stderr)
+{
+    ssh_session session;
+    ssh_buffer stdbuf;
+    struct ssh_channel_read_termination_struct ctx;
+    size_t len;
+    int rc;
 
-  if(channel == NULL) {
-      return SSH_ERROR;
-  }
+    if(channel == NULL) {
+        return SSH_ERROR;
+    }
 
-  session = channel->session;
-  stdbuf = channel->stdout_buffer;
+    session = channel->session;
+    stdbuf = channel->stdout_buffer;
 
-  if (is_stderr) {
-    stdbuf = channel->stderr_buffer;
-  }
-  ctx.buffer = stdbuf;
-  ctx.channel = channel;
-  ctx.count = 1;
-  rc = ssh_handle_packets_termination(channel->session, timeout,
-      ssh_channel_read_termination, &ctx);
-  if(rc ==SSH_ERROR || session->session_state == SSH_SESSION_STATE_ERROR){
-    rc = SSH_ERROR;
-    goto end;
-  }
-  rc = ssh_buffer_get_len(stdbuf);
-  if(rc > 0)
-    goto end;
-  if (channel->remote_eof)
-    rc = SSH_EOF;
-end:
-  return rc;
+    if (is_stderr) {
+        stdbuf = channel->stderr_buffer;
+    }
+    ctx.buffer = stdbuf;
+    ctx.channel = channel;
+    ctx.count = 1;
+    rc = ssh_handle_packets_termination(channel->session,
+                                        timeout,
+                                        ssh_channel_read_termination,
+                                        &ctx);
+    if (rc == SSH_ERROR ||
+       session->session_state == SSH_SESSION_STATE_ERROR) {
+        rc = SSH_ERROR;
+        goto out;
+    }
+    len = ssh_buffer_get_len(stdbuf);
+    if (len > 0) {
+        goto out;
+    }
+    if (channel->remote_eof) {
+        rc = SSH_EOF;
+    }
+
+out:
+    return rc;
 }
 
 /**
@@ -3196,8 +3245,9 @@ static int channel_protocol_select(ssh_channel *rchans, ssh_channel *wchans,
 }
 
 /* Just count number of pointers in the array */
-static int count_ptrs(ssh_channel *ptrs) {
-  int c;
+static size_t count_ptrs(ssh_channel *ptrs)
+{
+  size_t c;
   for (c = 0; ptrs[c] != NULL; c++)
     ;
 
@@ -3451,7 +3501,7 @@ pending:
                     payload);
 
 error:
-  ssh_buffer_free(payload);
+  SSH_BUFFER_FREE(payload);
 
   return rc;
 }
@@ -3513,7 +3563,7 @@ pending:
                     payload);
 
 error:
-  ssh_buffer_free(payload);
+  SSH_BUFFER_FREE(payload);
 
   return rc;
 }
@@ -3554,7 +3604,7 @@ int ssh_channel_request_send_exit_status(ssh_channel channel, int exit_status) {
 
   rc = channel_request(channel, "exit-status", buffer, 0);
 error:
-  ssh_buffer_free(buffer);
+  SSH_BUFFER_FREE(buffer);
   return rc;
 }
 
@@ -3609,7 +3659,7 @@ int ssh_channel_request_send_exit_signal(ssh_channel channel, const char *sig,
 
   rc = channel_request(channel, "exit-signal", buffer, 0);
 error:
-  ssh_buffer_free(buffer);
+  SSH_BUFFER_FREE(buffer);
   return rc;
 }
 

src/config.c

@@ -274,10 +274,8 @@ static int
 ssh_config_match(char *value, const char *pattern, bool negate)
 {
     int ok, result = 0;
-    char *lowervalue;
 
-    lowervalue = (value) ? ssh_lowercase(value) : NULL;
-    ok = match_pattern_list(lowervalue, pattern, strlen(pattern), 0);
+    ok = match_pattern_list(value, pattern, strlen(pattern), 0);
     if (ok <= 0 && negate == true) {
         result = 1;
     } else if (ok > 0 && negate == false) {
@@ -286,7 +284,6 @@ ssh_config_match(char *value, const char *pattern, bool negate)
     SSH_LOG(SSH_LOG_TRACE, "%s '%s' against pattern '%s'%s (ok=%d)",
             result == 1 ? "Matched" : "Not matched", value, pattern,
             negate == true ? " (negated)" : "", ok);
-    SAFE_FREE(lowervalue);
     return result;
 }
 
@@ -397,6 +394,11 @@ ssh_config_parse_line(ssh_session session,
   long l;
   int64_t ll;
 
+  /* Ignore empty lines */
+  if (line == NULL || *line == '\0') {
+    return 0;
+  }
+
   x = s = strdup(line);
   if (s == NULL) {
     ssh_set_error_oom(session);
@@ -450,6 +452,7 @@ ssh_config_parse_line(ssh_session session,
         int result = 1;
         size_t args = 0;
         enum ssh_config_match_e opt;
+        char *localuser = NULL;
 
         *parsing = 0;
         do {
@@ -515,8 +518,29 @@ ssh_config_parse_line(ssh_session session,
                 result = 0;
                 break;
 
-            case MATCH_ORIGINALHOST:
             case MATCH_LOCALUSER:
+                /* Here we match only one argument */
+                p = ssh_config_get_str_tok(&s, NULL);
+                if (p == NULL || p[0] == '\0') {
+                    ssh_set_error(session, SSH_FATAL,
+                                  "line %d: ERROR - Match user keyword "
+                                  "requires argument", count);
+                    SAFE_FREE(x);
+                    return -1;
+                }
+                localuser = ssh_get_local_username();
+                if (localuser == NULL) {
+                    SSH_LOG(SSH_LOG_WARN, "line %d: Can not get local username "
+                            "for conditional matching.", count);
+                    SAFE_FREE(x);
+                    return -1;
+                }
+                result &= ssh_config_match(localuser, p, negate);
+                SAFE_FREE(localuser);
+                args++;
+                break;
+
+            case MATCH_ORIGINALHOST:
                 /* Skip one argument */
                 p = ssh_config_get_str_tok(&s, NULL);
                 if (p == NULL || p[0] == '\0') {

src/connect.c

@@ -25,6 +25,7 @@
 
 #include <errno.h>
 #include <fcntl.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -90,131 +91,55 @@
 
 #ifdef _WIN32
 #ifndef gai_strerror
-char WSAAPI *gai_strerrorA(int code) {
-  static char buf[256];
+char WSAAPI *gai_strerrorA(int code)
+{
+    static char buf[256];
 
-  snprintf(buf, sizeof(buf), "Undetermined error code (%d)", code);
+    snprintf(buf, sizeof(buf), "Undetermined error code (%d)", code);
 
-  return buf;
+    return buf;
 }
 #endif /* gai_strerror */
 #endif /* _WIN32 */
 
-static int ssh_connect_socket_close(socket_t s){
+static int ssh_connect_socket_close(socket_t s)
+{
 #ifdef _WIN32
-  return closesocket(s);
+    return closesocket(s);
 #else
-  return close(s);
+    return close(s);
 #endif
 }
 
+static int getai(const char *host, int port, struct addrinfo **ai)
+{
+    const char *service = NULL;
+    struct addrinfo hints;
+    char s_port[10];
 
-static int getai(const char *host, int port, struct addrinfo **ai) {
-  const char *service = NULL;
-  struct addrinfo hints;
-  char s_port[10];
+    ZERO_STRUCT(hints);
 
-  ZERO_STRUCT(hints);
+    hints.ai_protocol = IPPROTO_TCP;
+    hints.ai_family = PF_UNSPEC;
+    hints.ai_socktype = SOCK_STREAM;
 
-  hints.ai_protocol = IPPROTO_TCP;
-  hints.ai_family = PF_UNSPEC;
-  hints.ai_socktype = SOCK_STREAM;
-
-  if (port == 0) {
-    hints.ai_flags = AI_PASSIVE;
-  } else {
-    snprintf(s_port, sizeof(s_port), "%hu", (unsigned short)port);
-    service = s_port;
+    if (port == 0) {
+        hints.ai_flags = AI_PASSIVE;
+    } else {
+        snprintf(s_port, sizeof(s_port), "%hu", (unsigned short)port);
+        service = s_port;
 #ifdef AI_NUMERICSERV
-    hints.ai_flags=AI_NUMERICSERV;
+        hints.ai_flags = AI_NUMERICSERV;
 #endif
-  }
+    }
 
-  if (ssh_is_ipaddr(host)) {
-    /* this is an IP address */
-    SSH_LOG(SSH_LOG_PACKET,"host %s matches an IP address",host);
-    hints.ai_flags |= AI_NUMERICHOST;
-  }
+    if (ssh_is_ipaddr(host)) {
+        /* this is an IP address */
+        SSH_LOG(SSH_LOG_PACKET, "host %s matches an IP address", host);
+        hints.ai_flags |= AI_NUMERICHOST;
+    }
 
-  return getaddrinfo(host, service, &hints, ai);
-}
-
-static int ssh_connect_ai_timeout(ssh_session session, const char *host,
-    int port, struct addrinfo *ai, long timeout, long usec, socket_t s) {
-  int timeout_ms;
-  ssh_pollfd_t fds;
-  int rc = 0;
-  int ret;
-  socklen_t len = sizeof(rc);
-
-  /* I know we're losing some precision. But it's not like poll-like family
-   * type of mechanisms are precise up to the microsecond.
-   */
-  timeout_ms=timeout * 1000 + usec / 1000;
-
-  rc = ssh_socket_set_nonblocking(s);
-  if (rc < 0) {
-      ssh_set_error(session, SSH_FATAL,
-          "Failed to set socket non-blocking for %s:%d", host, port);
-      ssh_connect_socket_close(s);
-      return -1;
-  }
-
-  SSH_LOG(SSH_LOG_RARE, "Trying to connect to host: %s:%d with "
-      "timeout %d ms", host, port, timeout_ms);
-
-  /* The return value is checked later */
-  connect(s, ai->ai_addr, ai->ai_addrlen);
-  freeaddrinfo(ai);
-
-  fds.fd=s;
-  fds.revents=0;
-  fds.events=POLLOUT;
-#ifdef _WIN32
-  fds.events |= POLLWRNORM;
-#endif
-  rc = ssh_poll(&fds,1,timeout_ms);
-
-  if (rc == 0) {
-    /* timeout */
-    ssh_set_error(session, SSH_FATAL,
-        "Timeout while connecting to %s:%d", host, port);
-    ssh_connect_socket_close(s);
-
-    return -1;
-  }
-
-  if (rc < 0) {
-    ssh_set_error(session, SSH_FATAL,
-        "poll error: %s", strerror(errno));
-    ssh_connect_socket_close(s);
-
-    return -1;
-  }
-  rc = -1;
-
-  /* Get connect(2) return code. Zero means no error */
-  ret = getsockopt(s, SOL_SOCKET, SO_ERROR,(char *) &rc, &len);
-  if (ret < 0 || rc != 0) {
-    ssh_set_error(session, SSH_FATAL,
-        "Connect to %s:%d failed: %s", host, port, strerror(rc));
-    ssh_connect_socket_close(s);
-
-    return -1;
-  }
-
-  /* s is connected ? */
-  SSH_LOG(SSH_LOG_PACKET, "Socket connected with timeout");
-  ret = ssh_socket_set_blocking(s);
-  if (ret < 0) {
-      ssh_set_error(session, SSH_FATAL,
-          "Failed to set socket as blocking connecting to %s:%d failed: %s",
-          host, port, strerror(errno));
-      ssh_connect_socket_close(s);
-      return -1;
-  }
-
-  return s;
+    return getaddrinfo(host, service, &hints, ai);
 }
 
 static int set_tcp_nodelay(socket_t socket)
@@ -228,99 +153,6 @@ static int set_tcp_nodelay(socket_t socket)
                       sizeof(opt));
 }
 
-/**
- * @internal
- *
- * @brief Connect to an IPv4 or IPv6 host specified by its IP address or
- * hostname.
- *
- * @returns A file descriptor, < 0 on error.
- */
-socket_t ssh_connect_host(ssh_session session, const char *host,
-    const char *bind_addr, int port, long timeout, long usec) {
-  socket_t s = -1;
-  int rc;
-  struct addrinfo *ai;
-  struct addrinfo *itr;
-
-  rc = getai(host, port, &ai);
-  if (rc != 0) {
-    ssh_set_error(session, SSH_FATAL,
-        "Failed to resolve hostname %s (%s)", host, gai_strerror(rc));
-
-    return -1;
-  }
-
-  for (itr = ai; itr != NULL; itr = itr->ai_next){
-    /* create socket */
-    s = socket(itr->ai_family, itr->ai_socktype, itr->ai_protocol);
-    if (s < 0) {
-      ssh_set_error(session, SSH_FATAL,
-          "Socket create failed: %s", strerror(errno));
-      continue;
-    }
-
-    if (bind_addr) {
-      struct addrinfo *bind_ai;
-      struct addrinfo *bind_itr;
-
-      SSH_LOG(SSH_LOG_PACKET, "Resolving %s", bind_addr);
-
-      rc = getai(bind_addr, 0, &bind_ai);
-      if (rc != 0) {
-        ssh_set_error(session, SSH_FATAL,
-            "Failed to resolve bind address %s (%s)",
-            bind_addr,
-            gai_strerror(rc));
-        freeaddrinfo(ai);
-        close(s);
-
-        return -1;
-      }
-
-      for (bind_itr = bind_ai; bind_itr != NULL; bind_itr = bind_itr->ai_next) {
-        if (bind(s, bind_itr->ai_addr, bind_itr->ai_addrlen) < 0) {
-          ssh_set_error(session, SSH_FATAL,
-              "Binding local address: %s", strerror(errno));
-          continue;
-        } else {
-          break;
-        }
-      }
-      freeaddrinfo(bind_ai);
-
-      /* Cannot bind to any local addresses */
-      if (bind_itr == NULL) {
-        ssh_connect_socket_close(s);
-        s = -1;
-        continue;
-      }
-    }
-
-    if (timeout || usec) {
-      socket_t ret = ssh_connect_ai_timeout(session, host, port, itr,
-          timeout, usec, s);
-
-      freeaddrinfo(ai);
-      return ret;
-    }
-
-    if (connect(s, itr->ai_addr, itr->ai_addrlen) < 0) {
-      ssh_set_error(session, SSH_FATAL, "Connect failed: %s", strerror(errno));
-      ssh_connect_socket_close(s);
-      s = -1;
-      continue;
-    } else {
-      /* We are connected */
-      break;
-    }
-  }
-
-  freeaddrinfo(ai);
-
-  return s;
-}
-
 /**
  * @internal
  *
@@ -331,102 +163,109 @@ socket_t ssh_connect_host(ssh_session session, const char *host,
  * @warning very ugly !!!
  */
 socket_t ssh_connect_host_nonblocking(ssh_session session, const char *host,
-    const char *bind_addr, int port) {
-  socket_t s = -1;
-  int rc;
-  struct addrinfo *ai;
-  struct addrinfo *itr;
+                                      const char *bind_addr, int port)
+{
+    socket_t s = -1;
+    int rc;
+    struct addrinfo *ai = NULL;
+    struct addrinfo *itr = NULL;
 
-  rc = getai(host, port, &ai);
-  if (rc != 0) {
-    ssh_set_error(session, SSH_FATAL,
-        "Failed to resolve hostname %s (%s)", host, gai_strerror(rc));
+    rc = getai(host, port, &ai);
+    if (rc != 0) {
+        ssh_set_error(session, SSH_FATAL,
+                      "Failed to resolve hostname %s (%s)",
+                      host, gai_strerror(rc));
 
-    return -1;
-  }
-
-  for (itr = ai; itr != NULL; itr = itr->ai_next){
-    /* create socket */
-    s = socket(itr->ai_family, itr->ai_socktype, itr->ai_protocol);
-    if (s < 0) {
-      ssh_set_error(session, SSH_FATAL,
-          "Socket create failed: %s", strerror(errno));
-      continue;
+        return -1;
     }
 
-    if (bind_addr) {
-      struct addrinfo *bind_ai;
-      struct addrinfo *bind_itr;
-
-      SSH_LOG(SSH_LOG_PACKET, "Resolving %s", bind_addr);
-
-      rc = getai(bind_addr, 0, &bind_ai);
-      if (rc != 0) {
-        ssh_set_error(session, SSH_FATAL,
-            "Failed to resolve bind address %s (%s)",
-            bind_addr,
-            gai_strerror(rc));
-        ssh_connect_socket_close(s);
-        s=-1;
-        break;
-      }
-
-      for (bind_itr = bind_ai; bind_itr != NULL; bind_itr = bind_itr->ai_next) {
-        if (bind(s, bind_itr->ai_addr, bind_itr->ai_addrlen) < 0) {
-          ssh_set_error(session, SSH_FATAL,
-              "Binding local address: %s", strerror(errno));
-          continue;
-        } else {
-          break;
+    for (itr = ai; itr != NULL; itr = itr->ai_next) {
+        /* create socket */
+        s = socket(itr->ai_family, itr->ai_socktype, itr->ai_protocol);
+        if (s < 0) {
+            ssh_set_error(session, SSH_FATAL,
+                          "Socket create failed: %s", strerror(errno));
+            continue;
         }
-      }
-      freeaddrinfo(bind_ai);
 
-      /* Cannot bind to any local addresses */
-      if (bind_itr == NULL) {
-        ssh_connect_socket_close(s);
-        s = -1;
-        continue;
-      }
-    }
+        if (bind_addr) {
+            struct addrinfo *bind_ai;
+            struct addrinfo *bind_itr;
 
-    rc = ssh_socket_set_nonblocking(s);
-    if (rc < 0) {
-        ssh_set_error(session, SSH_FATAL,
-            "Failed to set socket non-blocking for %s:%d", host, port);
-        ssh_connect_socket_close(s);
-        s = -1;
-        continue;
-    }
+            SSH_LOG(SSH_LOG_PACKET, "Resolving %s", bind_addr);
 
-    if (session->opts.nodelay) {
-        /* For winsock, socket options are only effective before connect */
-        rc = set_tcp_nodelay(s);
+            rc = getai(bind_addr, 0, &bind_ai);
+            if (rc != 0) {
+                ssh_set_error(session, SSH_FATAL,
+                              "Failed to resolve bind address %s (%s)",
+                              bind_addr,
+                              gai_strerror(rc));
+                ssh_connect_socket_close(s);
+                s = -1;
+                break;
+            }
+
+            for (bind_itr = bind_ai;
+                 bind_itr != NULL;
+                 bind_itr = bind_itr->ai_next)
+            {
+                if (bind(s, bind_itr->ai_addr, bind_itr->ai_addrlen) < 0) {
+                    ssh_set_error(session, SSH_FATAL,
+                                  "Binding local address: %s", strerror(errno));
+                    continue;
+                } else {
+                    break;
+                }
+            }
+            freeaddrinfo(bind_ai);
+
+            /* Cannot bind to any local addresses */
+            if (bind_itr == NULL) {
+                ssh_connect_socket_close(s);
+                s = -1;
+                continue;
+            }
+        }
+
+        rc = ssh_socket_set_nonblocking(s);
         if (rc < 0) {
             ssh_set_error(session, SSH_FATAL,
-                "Failed to set TCP_NODELAY on socket: %s", strerror(errno));
+                          "Failed to set socket non-blocking for %s:%d",
+                          host, port);
             ssh_connect_socket_close(s);
             s = -1;
             continue;
         }
+
+        if (session->opts.nodelay) {
+            /* For winsock, socket options are only effective before connect */
+            rc = set_tcp_nodelay(s);
+            if (rc < 0) {
+                ssh_set_error(session, SSH_FATAL,
+                              "Failed to set TCP_NODELAY on socket: %s",
+                              strerror(errno));
+                ssh_connect_socket_close(s);
+                s = -1;
+                continue;
+            }
+        }
+
+        errno = 0;
+        rc = connect(s, itr->ai_addr, itr->ai_addrlen);
+        if (rc == -1 && (errno != 0) && (errno != EINPROGRESS)) {
+            ssh_set_error(session, SSH_FATAL,
+                          "Failed to connect: %s", strerror(errno));
+            ssh_connect_socket_close(s);
+            s = -1;
+            continue;
+        }
+
+        break;
     }
 
-    errno = 0;
-    rc = connect(s, itr->ai_addr, itr->ai_addrlen);
-    if (rc == -1 && (errno != 0) && (errno != EINPROGRESS)) {
-      ssh_set_error(session, SSH_FATAL,
-          "Failed to connect: %s", strerror(errno));
-      ssh_connect_socket_close(s);
-      s = -1;
-      continue;
-    }
+    freeaddrinfo(ai);
 
-    break;
-  }
-
-  freeaddrinfo(ai);
-
-  return s;
+    return s;
 }
 
 /**
@@ -435,11 +274,13 @@ socket_t ssh_connect_host_nonblocking(ssh_session session, const char *host,
  * @{
  */
 
-static int ssh_select_cb (socket_t fd, int revents, void *userdata){
-  fd_set *set = (fd_set *)userdata;
-  if(revents & POLLIN)
-    FD_SET(fd, set);
-  return 0;
+static int ssh_select_cb (socket_t fd, int revents, void *userdata)
+{
+    fd_set *set = (fd_set *)userdata;
+    if (revents & POLLIN) {
+        FD_SET(fd, set);
+    }
+    return 0;
 }
 
 /**
@@ -473,73 +314,84 @@ static int ssh_select_cb (socket_t fd, int revents, void *userdata){
  * @see select(2)
  */
 int ssh_select(ssh_channel *channels, ssh_channel *outchannels, socket_t maxfd,
-    fd_set *readfds, struct timeval *timeout) {
-  fd_set origfds;
-  socket_t fd;
-  size_t i, j;
-  int rc;
-  int base_tm, tm;
-  struct ssh_timestamp ts;
-  ssh_event event = ssh_event_new();
-  int firstround=1;
+               fd_set *readfds, struct timeval *timeout)
+{
+    fd_set origfds;
+    socket_t fd;
+    size_t i, j;
+    int rc;
+    int base_tm, tm;
+    struct ssh_timestamp ts;
+    ssh_event event = ssh_event_new();
+    int firstround = 1;
 
-  base_tm = tm=timeout->tv_sec * 1000 + timeout->tv_usec/1000;
-  for (i=0 ; channels[i] != NULL; ++i){
-    ssh_event_add_session(event, channels[i]->session);
-  }
-
-  ZERO_STRUCT(origfds);
-  FD_ZERO(&origfds);
-  for (fd = 0; fd < maxfd ; fd++) {
-      if (FD_ISSET(fd, readfds)) {
-          ssh_event_add_fd(event, fd, POLLIN, ssh_select_cb, readfds);
-          FD_SET(fd, &origfds);
-      }
-  }
-  outchannels[0] = NULL;
-  FD_ZERO(readfds);
-  ssh_timestamp_init(&ts);
-  do {
-    /* Poll every channel */
-    j = 0;
-    for (i = 0; channels[i]; i++) {
-      if(ssh_channel_poll(channels[i], 0) != 0) {
-        outchannels[j] = channels[i];
-        j++;
-      } else if(ssh_channel_poll(channels[i], 1) != 0) {
-        outchannels[j] = channels[i];
-        j++;
-      }
+    base_tm = tm = (timeout->tv_sec * 1000) + (timeout->tv_usec / 1000);
+    for (i = 0 ; channels[i] != NULL; ++i) {
+        ssh_event_add_session(event, channels[i]->session);
     }
-    outchannels[j] = NULL;
-    if(j != 0)
-      break;
-    /* watch if a user socket was triggered */
-    for (fd = 0; fd < maxfd; fd++) {
+
+    ZERO_STRUCT(origfds);
+    FD_ZERO(&origfds);
+    for (fd = 0; fd < maxfd ; fd++) {
         if (FD_ISSET(fd, readfds)) {
-            goto out;
+            ssh_event_add_fd(event, fd, POLLIN, ssh_select_cb, readfds);
+            FD_SET(fd, &origfds);
         }
     }
+    outchannels[0] = NULL;
+    FD_ZERO(readfds);
+    ssh_timestamp_init(&ts);
+    do {
+        /* Poll every channel */
+        j = 0;
+        for (i = 0; channels[i]; i++) {
+            rc = ssh_channel_poll(channels[i], 0);
+            if (rc != 0) {
+                outchannels[j] = channels[i];
+                j++;
+            } else {
+                rc = ssh_channel_poll(channels[i], 1);
+                if (rc != 0) {
+                    outchannels[j] = channels[i];
+                    j++;
+                }
+            }
+        }
 
-    /* If the timeout is elapsed, we should go out */
-    if(!firstround && ssh_timeout_elapsed(&ts, base_tm))
-      goto out;
-    /* since there's nothing, let's fire the polling */
-    rc = ssh_event_dopoll(event,tm);
-    if (rc == SSH_ERROR){
-      goto out;
-    }
-    tm = ssh_timeout_update(&ts, base_tm);
-    firstround=0;
-  } while (1);
+        outchannels[j] = NULL;
+        if (j != 0) {
+            break;
+        }
+
+        /* watch if a user socket was triggered */
+        for (fd = 0; fd < maxfd; fd++) {
+            if (FD_ISSET(fd, readfds)) {
+                goto out;
+            }
+        }
+
+        /* If the timeout is elapsed, we should go out */
+        if (!firstround && ssh_timeout_elapsed(&ts, base_tm)) {
+            goto out;
+        }
+
+        /* since there's nothing, let's fire the polling */
+        rc = ssh_event_dopoll(event,tm);
+        if (rc == SSH_ERROR) {
+            goto out;
+        }
+
+        tm = ssh_timeout_update(&ts, base_tm);
+        firstround = 0;
+    } while (1);
 out:
-  for (fd = 0; fd < maxfd; fd++) {
-    if (FD_ISSET(fd, &origfds)) {
-      ssh_event_remove_fd(event, fd);
+    for (fd = 0; fd < maxfd; fd++) {
+        if (FD_ISSET(fd, &origfds)) {
+            ssh_event_remove_fd(event, fd);
+        }
     }
-  }
-  ssh_event_free(event);
-  return SSH_OK;
+    ssh_event_free(event);
+    return SSH_OK;
 }
 
 /** @} */

src/curve25519.c

@@ -39,6 +39,10 @@
 #include "libssh/pki.h"
 #include "libssh/bignum.h"
 
+#ifdef HAVE_OPENSSL_X25519
+#include <openssl/err.h>
+#endif
+
 static SSH_PACKET_CALLBACK(ssh_packet_client_curve25519_reply);
 
 static ssh_packet_callback dh_client_callbacks[] = {
@@ -52,58 +56,221 @@ static struct ssh_packet_callbacks_struct ssh_curve25519_client_callbacks = {
     .user = NULL
 };
 
+static int ssh_curve25519_init(ssh_session session)
+{
+    int rc;
+#ifdef HAVE_OPENSSL_X25519
+    EVP_PKEY_CTX *pctx = NULL;
+    EVP_PKEY *pkey = NULL;
+    size_t pubkey_len = CURVE25519_PUBKEY_SIZE;
+    size_t pkey_len = CURVE25519_PRIVKEY_SIZE;
+
+    pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_X25519, NULL);
+    if (pctx == NULL) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to initialize X25519 context: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        return SSH_ERROR;
+    }
+
+    rc = EVP_PKEY_keygen_init(pctx);
+    if (rc != 1) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to initialize X25519 keygen: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        EVP_PKEY_CTX_free(pctx);
+        return SSH_ERROR;
+    }
+
+    rc = EVP_PKEY_keygen(pctx, &pkey);
+    EVP_PKEY_CTX_free(pctx);
+    if (rc != 1) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to generate X25519 keys: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        return SSH_ERROR;
+    }
+
+    if (session->server) {
+        rc = EVP_PKEY_get_raw_public_key(pkey,
+                                         session->next_crypto->curve25519_server_pubkey,
+                                         &pubkey_len);
+    } else {
+        rc = EVP_PKEY_get_raw_public_key(pkey,
+                                         session->next_crypto->curve25519_client_pubkey,
+                                         &pubkey_len);
+    }
+
+    if (rc != 1) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to get X25519 raw public key: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        EVP_PKEY_free(pkey);
+        return SSH_ERROR;
+    }
+
+    rc = EVP_PKEY_get_raw_private_key(pkey,
+                                      session->next_crypto->curve25519_privkey,
+                                      &pkey_len);
+    if (rc != 1) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to get X25519 raw private key: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        EVP_PKEY_free(pkey);
+        return SSH_ERROR;
+    }
+
+    EVP_PKEY_free(pkey);
+#else
+    rc = ssh_get_random(session->next_crypto->curve25519_privkey,
+                        CURVE25519_PRIVKEY_SIZE, 1);
+    if (rc != 1) {
+        ssh_set_error(session, SSH_FATAL, "PRNG error");
+        return SSH_ERROR;
+    }
+
+    if (session->server) {
+        crypto_scalarmult_base(session->next_crypto->curve25519_server_pubkey,
+                               session->next_crypto->curve25519_privkey);
+    } else {
+        crypto_scalarmult_base(session->next_crypto->curve25519_client_pubkey,
+                               session->next_crypto->curve25519_privkey);
+    }
+#endif /* HAVE_OPENSSL_X25519 */
+
+    return SSH_OK;
+}
+
 /** @internal
  * @brief Starts curve25519-sha256@libssh.org / curve25519-sha256 key exchange
  */
-int ssh_client_curve25519_init(ssh_session session){
-  int rc;
-  int ok;
+int ssh_client_curve25519_init(ssh_session session)
+{
+    int rc;
 
-  ok = ssh_get_random(session->next_crypto->curve25519_privkey, CURVE25519_PRIVKEY_SIZE, 1);
-  if (!ok) {
-	  ssh_set_error(session, SSH_FATAL, "PRNG error");
-	  return SSH_ERROR;
-  }
+    rc = ssh_curve25519_init(session);
+    if (rc != SSH_OK) {
+        return rc;
+    }
 
-  crypto_scalarmult_base(session->next_crypto->curve25519_client_pubkey,
-		  session->next_crypto->curve25519_privkey);
+    rc = ssh_buffer_pack(session->out_buffer,
+                         "bdP",
+                         SSH2_MSG_KEX_ECDH_INIT,
+                         CURVE25519_PUBKEY_SIZE,
+                         (size_t)CURVE25519_PUBKEY_SIZE,
+                         session->next_crypto->curve25519_client_pubkey);
+    if (rc != SSH_OK) {
+        ssh_set_error_oom(session);
+        return SSH_ERROR;
+    }
 
-  rc = ssh_buffer_pack(session->out_buffer,
-                       "bdP",
-                       SSH2_MSG_KEX_ECDH_INIT,
-                       CURVE25519_PUBKEY_SIZE,
-                       (size_t)CURVE25519_PUBKEY_SIZE, session->next_crypto->curve25519_client_pubkey);
-  if (rc != SSH_OK) {
-      ssh_set_error_oom(session);
-      return SSH_ERROR;
-  }
-  /* register the packet callbacks */
-  ssh_packet_set_callbacks(session, &ssh_curve25519_client_callbacks);
-  session->dh_handshake_state = DH_STATE_INIT_SENT;
-  rc = ssh_packet_send(session);
+    /* register the packet callbacks */
+    ssh_packet_set_callbacks(session, &ssh_curve25519_client_callbacks);
+    session->dh_handshake_state = DH_STATE_INIT_SENT;
+    rc = ssh_packet_send(session);
 
-  return rc;
+    return rc;
 }
 
-static int ssh_curve25519_build_k(ssh_session session) {
-  ssh_curve25519_pubkey k;
+static int ssh_curve25519_build_k(ssh_session session)
+{
+    ssh_curve25519_pubkey k;
 
-  if (session->server)
-	  crypto_scalarmult(k, session->next_crypto->curve25519_privkey,
-			  session->next_crypto->curve25519_client_pubkey);
-  else
-	  crypto_scalarmult(k, session->next_crypto->curve25519_privkey,
-			  session->next_crypto->curve25519_server_pubkey);
+#ifdef HAVE_OPENSSL_X25519
+    EVP_PKEY_CTX *pctx = NULL;
+    EVP_PKEY *pkey = NULL, *pubkey = NULL;
+    size_t shared_key_len;
+    int rc;
 
-  bignum_bin2bn(k, CURVE25519_PUBKEY_SIZE, &session->next_crypto->shared_secret);
-  if (session->next_crypto->shared_secret == NULL) {
-    return SSH_ERROR;
-  }
+    pkey = EVP_PKEY_new_raw_private_key(EVP_PKEY_X25519, NULL,
+                                        session->next_crypto->curve25519_privkey,
+                                        CURVE25519_PRIVKEY_SIZE);
+    if (pkey == NULL) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to create X25519 EVP_PKEY: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        return SSH_ERROR;
+    }
+
+    pctx = EVP_PKEY_CTX_new(pkey, NULL);
+    if (pctx == NULL) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to initialize X25519 context: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        EVP_PKEY_free(pkey);
+        return SSH_ERROR;
+    }
+
+    rc = EVP_PKEY_derive_init(pctx);
+    if (rc != 1) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to initialize X25519 key derivation: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        EVP_PKEY_free(pkey);
+        EVP_PKEY_CTX_free(pctx);
+        return SSH_ERROR;
+    }
+
+    if (session->server) {
+        pubkey = EVP_PKEY_new_raw_public_key(EVP_PKEY_X25519, NULL,
+                                             session->next_crypto->curve25519_client_pubkey,
+                                             CURVE25519_PUBKEY_SIZE);
+    } else {
+        pubkey = EVP_PKEY_new_raw_public_key(EVP_PKEY_X25519, NULL,
+                                             session->next_crypto->curve25519_server_pubkey,
+                                             CURVE25519_PUBKEY_SIZE);
+    }
+    if (pubkey == NULL) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to create X25519 public key EVP_PKEY: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        EVP_PKEY_free(pkey);
+        EVP_PKEY_CTX_free(pctx);
+        return SSH_ERROR;
+    }
+
+    rc = EVP_PKEY_derive_set_peer(pctx, pubkey);
+    if (rc != 1) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to set peer X25519 public key: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        EVP_PKEY_free(pkey);
+        EVP_PKEY_free(pubkey);
+        EVP_PKEY_CTX_free(pctx);
+        return SSH_ERROR;
+    }
+
+    rc = EVP_PKEY_derive(pctx,
+                         k,
+                         &shared_key_len);
+    if (rc != 1) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to derive X25519 shared secret: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        EVP_PKEY_free(pkey);
+        EVP_PKEY_free(pubkey);
+        EVP_PKEY_CTX_free(pctx);
+        return SSH_ERROR;
+    }
+#else
+    if (session->server) {
+        crypto_scalarmult(k, session->next_crypto->curve25519_privkey,
+                          session->next_crypto->curve25519_client_pubkey);
+    } else {
+        crypto_scalarmult(k, session->next_crypto->curve25519_privkey,
+                          session->next_crypto->curve25519_server_pubkey);
+    }
+#endif /* HAVE_OPENSSL_X25519 */
+
+    bignum_bin2bn(k, CURVE25519_PUBKEY_SIZE, &session->next_crypto->shared_secret);
+    if (session->next_crypto->shared_secret == NULL) {
+        return SSH_ERROR;
+    }
 
 #ifdef DEBUG_CRYPTO
-    ssh_print_hexa("Session server cookie",
+    ssh_log_hexdump("Session server cookie",
                    session->next_crypto->server_kex.cookie, 16);
-    ssh_print_hexa("Session client cookie",
+    ssh_log_hexdump("Session client cookie",
                    session->next_crypto->client_kex.cookie, 16);
     ssh_print_bignum("Shared secret key", session->next_crypto->shared_secret);
 #endif
@@ -132,7 +299,7 @@ static SSH_PACKET_CALLBACK(ssh_packet_client_curve25519_reply){
   }
 
   rc = ssh_dh_import_next_pubkey_blob(session, pubkey_blob);
-  ssh_string_free(pubkey_blob);
+  SSH_STRING_FREE(pubkey_blob);
   if (rc != 0) {
       ssh_set_error(session,
                     SSH_FATAL,
@@ -148,11 +315,11 @@ static SSH_PACKET_CALLBACK(ssh_packet_client_curve25519_reply){
   if (ssh_string_len(q_s_string) != CURVE25519_PUBKEY_SIZE){
 	  ssh_set_error(session, SSH_FATAL, "Incorrect size for server Curve25519 public key: %d",
 			  (int)ssh_string_len(q_s_string));
-	  ssh_string_free(q_s_string);
+	  SSH_STRING_FREE(q_s_string);
 	  goto error;
   }
   memcpy(session->next_crypto->curve25519_server_pubkey, ssh_string_data(q_s_string), CURVE25519_PUBKEY_SIZE);
-  ssh_string_free(q_s_string);
+  SSH_STRING_FREE(q_s_string);
 
   signature = ssh_buffer_get_ssh_string(packet);
   if (signature == NULL) {
@@ -221,8 +388,8 @@ static SSH_PACKET_CALLBACK(ssh_packet_server_curve25519_init){
 
     /* SSH host keys (rsa,dsa,ecdsa) */
     ssh_key privkey;
+    enum ssh_digest_e digest = SSH_DIGEST_AUTO;
     ssh_string sig_blob = NULL;
-    int ok;
     int rc;
     (void)type;
     (void)user;
@@ -240,24 +407,21 @@ static SSH_PACKET_CALLBACK(ssh_packet_server_curve25519_init){
                       SSH_FATAL,
                       "Incorrect size for server Curve25519 public key: %zu",
                       ssh_string_len(q_c_string));
-        ssh_string_free(q_c_string);
+        SSH_STRING_FREE(q_c_string);
         goto error;
     }
 
     memcpy(session->next_crypto->curve25519_client_pubkey,
-    		ssh_string_data(q_c_string), CURVE25519_PUBKEY_SIZE);
-    ssh_string_free(q_c_string);
+           ssh_string_data(q_c_string), CURVE25519_PUBKEY_SIZE);
+    SSH_STRING_FREE(q_c_string);
     /* Build server's keypair */
 
-    ok = ssh_get_random(session->next_crypto->curve25519_privkey, CURVE25519_PRIVKEY_SIZE, 1);
-    if (!ok) {
-        ssh_set_error(session, SSH_FATAL, "PRNG error");
+    rc = ssh_curve25519_init(session);
+    if (rc != SSH_OK) {
+        ssh_set_error(session, SSH_FATAL, "Failed to generate curve25519 keys");
         goto error;
     }
 
-    crypto_scalarmult_base(session->next_crypto->curve25519_server_pubkey,
-  		  session->next_crypto->curve25519_privkey);
-
     rc = ssh_buffer_add_u8(session->out_buffer, SSH2_MSG_KEX_ECDH_REPLY);
     if (rc < 0) {
         ssh_set_error_oom(session);
@@ -272,7 +436,7 @@ static SSH_PACKET_CALLBACK(ssh_packet_server_curve25519_init){
     }
 
     /* privkey is not allocated */
-    rc = ssh_get_key_params(session, &privkey);
+    rc = ssh_get_key_params(session, &privkey, &digest);
     if (rc == SSH_ERROR) {
         goto error;
     }
@@ -292,7 +456,7 @@ static SSH_PACKET_CALLBACK(ssh_packet_server_curve25519_init){
     /* add host's public key */
     rc = ssh_buffer_add_ssh_string(session->out_buffer,
                                    server_pubkey_blob);
-    ssh_string_free(server_pubkey_blob);
+    SSH_STRING_FREE(server_pubkey_blob);
     if (rc < 0) {
         ssh_set_error_oom(session);
         goto error;
@@ -309,20 +473,20 @@ static SSH_PACKET_CALLBACK(ssh_packet_server_curve25519_init){
                     CURVE25519_PUBKEY_SIZE);
 
     rc = ssh_buffer_add_ssh_string(session->out_buffer, q_s_string);
-    ssh_string_free(q_s_string);
+    SSH_STRING_FREE(q_s_string);
     if (rc < 0) {
         ssh_set_error_oom(session);
         goto error;
     }
     /* add signature blob */
-    sig_blob = ssh_srv_pki_do_sign_sessionid(session, privkey);
+    sig_blob = ssh_srv_pki_do_sign_sessionid(session, privkey, digest);
     if (sig_blob == NULL) {
         ssh_set_error(session, SSH_FATAL, "Could not sign the session id");
         goto error;
     }
 
     rc = ssh_buffer_add_ssh_string(session->out_buffer, sig_blob);
-    ssh_string_free(sig_blob);
+    SSH_STRING_FREE(sig_blob);
     if (rc < 0) {
         ssh_set_error_oom(session);
         goto error;

src/dh-gex.c

@@ -107,7 +107,7 @@ SSH_PACKET_CALLBACK(ssh_packet_client_dhgex_group)
     int blen;
     bignum pmin1 = NULL, one = NULL;
     bignum_CTX ctx = bignum_ctx_new();
-    bignum modulus, generator;
+    bignum modulus = NULL, generator = NULL;
     const_bignum pubkey;
     (void) type;
     (void) user;
@@ -179,14 +179,18 @@ SSH_PACKET_CALLBACK(ssh_packet_client_dhgex_group)
     bignum_ctx_free(ctx);
     ctx = NULL;
 
-    /* all checks passed, set parameters */
+    /* all checks passed, set parameters (the BNs are copied in openssl backend) */
     rc = ssh_dh_set_parameters(session->next_crypto->dh_ctx,
                                modulus, generator);
     if (rc != SSH_OK) {
-        bignum_safe_free(modulus);
-        bignum_safe_free(generator);
         goto error;
     }
+#ifdef HAVE_LIBCRYPTO
+    bignum_safe_free(modulus);
+    bignum_safe_free(generator);
+#endif
+    modulus = NULL;
+    generator = NULL;
 
     /* compute and send DH public parameter */
     rc = ssh_dh_keypair_gen_keys(session->next_crypto->dh_ctx,
@@ -194,8 +198,13 @@ SSH_PACKET_CALLBACK(ssh_packet_client_dhgex_group)
     if (rc == SSH_ERROR) {
         goto error;
     }
+
     rc = ssh_dh_keypair_get_keys(session->next_crypto->dh_ctx,
                                  DH_CLIENT_KEYPAIR, NULL, &pubkey);
+    if (rc != SSH_OK) {
+        goto error;
+    }
+
     rc = ssh_buffer_pack(session->out_buffer,
                          "bB",
                          SSH2_MSG_KEX_DH_GEX_INIT,
@@ -216,6 +225,8 @@ SSH_PACKET_CALLBACK(ssh_packet_client_dhgex_group)
     return SSH_PACKET_USED;
 
 error:
+    bignum_safe_free(modulus);
+    bignum_safe_free(generator);
     bignum_safe_free(one);
     bignum_safe_free(pmin1);
     if(!bignum_ctx_invalid(ctx)) {
@@ -254,7 +265,7 @@ static SSH_PACKET_CALLBACK(ssh_packet_client_dhgex_reply)
     }
 
     rc = ssh_dh_import_next_pubkey_blob(session, pubkey_blob);
-    ssh_string_free(pubkey_blob);
+    SSH_STRING_FREE(pubkey_blob);
     if (rc != 0) {
         goto error;
     }
@@ -262,6 +273,7 @@ static SSH_PACKET_CALLBACK(ssh_packet_client_dhgex_reply)
     rc = ssh_dh_compute_shared_secret(session->next_crypto->dh_ctx,
                                       DH_CLIENT_KEYPAIR, DH_SERVER_KEYPAIR,
                                       &session->next_crypto->shared_secret);
+    ssh_dh_debug_crypto(session->next_crypto);
     if (rc == SSH_ERROR) {
         ssh_set_error(session, SSH_FATAL, "Could not generate shared secret");
         goto error;
@@ -636,8 +648,8 @@ static SSH_PACKET_CALLBACK(ssh_packet_server_dhgex_request)
                          generator);
 
 #ifdef HAVE_LIBCRYPTO
-        bignum_safe_free(generator);
-        bignum_safe_free(modulus);
+    bignum_safe_free(generator);
+    bignum_safe_free(modulus);
 #endif
 
     if (rc != SSH_OK) {

src/dh.c

@@ -365,7 +365,7 @@ SSH_PACKET_CALLBACK(ssh_packet_client_dh_reply){
       goto error;
   }
   rc = ssh_dh_import_next_pubkey_blob(session, pubkey_blob);
-  ssh_string_free(pubkey_blob);
+  SSH_STRING_FREE(pubkey_blob);
   if (rc != 0) {
       goto error;
   }
@@ -373,6 +373,7 @@ SSH_PACKET_CALLBACK(ssh_packet_client_dh_reply){
   rc = ssh_dh_compute_shared_secret(session->next_crypto->dh_ctx,
                                     DH_CLIENT_KEYPAIR, DH_SERVER_KEYPAIR,
                                     &session->next_crypto->shared_secret);
+  ssh_dh_debug_crypto(session->next_crypto);
   if (rc == SSH_ERROR){
     ssh_set_error(session, SSH_FATAL, "Could not generate shared secret");
     goto error;
@@ -430,6 +431,7 @@ int ssh_server_dh_process_init(ssh_session session, ssh_buffer packet)
 {
     struct ssh_crypto_struct *crypto = session->next_crypto;
     ssh_key privkey = NULL;
+    enum ssh_digest_e digest = SSH_DIGEST_AUTO;
     ssh_string sig_blob = NULL;
     ssh_string pubkey_blob = NULL;
     bignum client_pubkey;
@@ -455,13 +457,14 @@ int ssh_server_dh_process_init(ssh_session session, ssh_buffer packet)
         goto error;
     }
 
-    rc = ssh_get_key_params(session, &privkey);
+    rc = ssh_get_key_params(session, &privkey, &digest);
     if (rc != SSH_OK) {
         goto error;
     }
     rc = ssh_dh_compute_shared_secret(crypto->dh_ctx,
                                       DH_SERVER_KEYPAIR, DH_CLIENT_KEYPAIR,
                                       &crypto->shared_secret);
+    ssh_dh_debug_crypto(crypto);
     if (rc == SSH_ERROR) {
         ssh_set_error(session, SSH_FATAL, "Could not generate shared secret");
         goto error;
@@ -471,7 +474,7 @@ int ssh_server_dh_process_init(ssh_session session, ssh_buffer packet)
         ssh_set_error(session, SSH_FATAL, "Could not create a session id");
         goto error;
     }
-    sig_blob = ssh_srv_pki_do_sign_sessionid(session, privkey);
+    sig_blob = ssh_srv_pki_do_sign_sessionid(session, privkey, digest);
     if (sig_blob == NULL) {
         ssh_set_error(session, SSH_FATAL, "Could not sign the session id");
         goto error;
@@ -693,13 +696,16 @@ static char *ssh_get_b64_unpadded(const unsigned char *hash, size_t len)
 /**
  * @brief Get a hash as a human-readable hex- or base64-string.
  *
- * This gets an allocated fingerprint hash. It is a hex strings if the given
- * hash is a md5 sum.  If it is a SHA sum, it will return an unpadded base64
- * strings.  Either way, the output is prepended by the hash-type.
+ * This gets an allocated fingerprint hash.  If it is a SHA sum, it will
+ * return an unpadded base64 strings.  If it is a MD5 sum, it will return hex
+ * string. Either way, the output is prepended by the hash-type.
  *
- * @param  type         Which sort of hash is given.
+ * @warning Do NOT use MD5 or SHA1! Those hash functions are being deprecated.
  *
- * @param  hash         What should be converted to a base64 string.
+ * @param  type         Which sort of hash is given, use
+ *                      SSH_PUBLICKEY_HASH_SHA256 or better.
+ *
+ * @param  hash         The hash to be converted to fingerprint.
  *
  * @param  len          Length of the buffer to convert.
  *
@@ -766,13 +772,13 @@ char *ssh_get_fingerprint_hash(enum ssh_publickey_hash_type type,
 /**
  * @brief Print a hash as a human-readable hex- or base64-string.
  *
- * This function prints hex strings if the given hash is a md5 sum.
- * But prints unpadded base64 strings for sha sums.
- * Either way, the output is prepended by the hash-type.
+ * This prints an unpadded base64 strings for SHA sums and hex strings for MD5
+ * sum.  Either way, the output is prepended by the hash-type.
  *
- * @param  type         Which sort of hash is given.
+ * @param  type         Which sort of hash is given. Use
+ *                      SSH_PUBLICKEY_HASH_SHA256 or better.
  *
- * @param  hash         What should be converted to a base64 string.
+ * @param  hash         The hash to be converted to fingerprint.
  *
  * @param  len          Length of the buffer to convert.
  *

src/dh_crypto.c

@@ -41,6 +41,27 @@ struct dh_ctx {
     DH *keypair[2];
 };
 
+void ssh_dh_debug_crypto(struct ssh_crypto_struct *c)
+{
+#ifdef DEBUG_CRYPTO
+    const_bignum x = NULL, y = NULL, e = NULL, f = NULL;
+
+    ssh_dh_keypair_get_keys(c->dh_ctx, DH_CLIENT_KEYPAIR, &x, &e);
+    ssh_dh_keypair_get_keys(c->dh_ctx, DH_SERVER_KEYPAIR, &y, &f);
+    ssh_print_bignum("x", x);
+    ssh_print_bignum("y", y);
+    ssh_print_bignum("e", e);
+    ssh_print_bignum("f", f);
+
+    ssh_log_hexdump("Session server cookie", c->server_kex.cookie, 16);
+    ssh_log_hexdump("Session client cookie", c->client_kex.cookie, 16);
+    ssh_print_bignum("k", c->shared_secret);
+
+#else
+    (void)c; /* UNUSED_PARAM */
+#endif
+}
+
 int ssh_dh_keypair_get_keys(struct dh_ctx *ctx, int peer,
                             const_bignum *priv, const_bignum *pub)
 {
@@ -96,12 +117,14 @@ int ssh_dh_get_parameters(struct dh_ctx *ctx,
 int ssh_dh_set_parameters(struct dh_ctx *ctx,
                           const bignum modulus, const bignum generator)
 {
+    size_t i;
     int rc;
 
     if ((ctx == NULL) || (modulus == NULL) || (generator == NULL)) {
         return SSH_ERROR;
     }
-    for (int i = 0; i < 2; i++) {
+
+    for (i = 0; i < 2; i++) {
         bignum p = NULL;
         bignum g = NULL;
 

src/dh_key.c

@@ -60,6 +60,28 @@ struct dh_ctx {
     bignum modulus;
 };
 
+void ssh_dh_debug_crypto(struct ssh_crypto_struct *c)
+{
+#ifdef DEBUG_CRYPTO
+    const_bignum x = NULL, y = NULL, e = NULL, f = NULL;
+
+    ssh_dh_keypair_get_keys(c->dh_ctx, DH_CLIENT_KEYPAIR, &x, &e);
+    ssh_dh_keypair_get_keys(c->dh_ctx, DH_SERVER_KEYPAIR, &y, &f);
+    ssh_print_bignum("p", c->dh_ctx->modulus);
+    ssh_print_bignum("g", c->dh_ctx->generator);
+    ssh_print_bignum("x", x);
+    ssh_print_bignum("y", y);
+    ssh_print_bignum("e", e);
+    ssh_print_bignum("f", f);
+
+    ssh_log_hexdump("Session server cookie", c->server_kex.cookie, 16);
+    ssh_log_hexdump("Session client cookie", c->client_kex.cookie, 16);
+    ssh_print_bignum("k", c->shared_secret);
+#else
+    (void)c; /* UNUSED_PARAM */
+#endif
+}
+
 static void ssh_dh_free_modulus(struct dh_ctx *ctx)
 {
     if ((ctx->modulus != ssh_dh_group1) &&
@@ -263,30 +285,6 @@ void ssh_dh_cleanup(struct ssh_crypto_struct *crypto)
     crypto->dh_ctx = NULL;
 }
 
-#ifdef DEBUG_CRYPTO
-static void ssh_dh_debug(ssh_session session)
-{
-    struct ssh_crypto_struct *crypto = session->next_crypto;
-    const_bignum x, y, e, f;
-    ssh_dh_keypair_get_keys(crypto->dh_ctx, DH_CLIENT_KEYPAIR, &x, &e);
-    ssh_dh_keypair_get_keys(crypto->dh_ctx, DH_SERVER_KEYPAIR, &y, &f);
-    ssh_print_bignum("p", crypto->dh_ctx->modulus);
-    ssh_print_bignum("g", crypto->dh_ctx->generator);
-    ssh_print_bignum("x", x);
-    ssh_print_bignum("y", y);
-    ssh_print_bignum("e", e);
-    ssh_print_bignum("f", f);
-
-    ssh_print_hexa("Session server cookie",
-                   session->next_crypto->server_kex.cookie, 16);
-    ssh_print_hexa("Session client cookie",
-                   session->next_crypto->client_kex.cookie, 16);
-    ssh_print_bignum("k", session->next_crypto->shared_secret);
-}
-#else
-#define ssh_dh_debug(session)
-#endif
-
 /** @internal
  * @brief generates a secret DH parameter of at least DH_SECURITY_BITS
  *        security as well as the corresponding public key.
@@ -370,7 +368,6 @@ int ssh_dh_compute_shared_secret(struct dh_ctx *dh_ctx, int local, int remote,
 
 done:
     bignum_ctx_free(ctx);
-    ssh_dh_debug(session);
     if (rc != 1) {
         return SSH_ERROR;
     }

src/ecdh.c

@@ -63,7 +63,7 @@ SSH_PACKET_CALLBACK(ssh_packet_client_ecdh_reply){
   }
 
   rc = ssh_dh_import_next_pubkey_blob(session, pubkey_blob);
-  ssh_string_free(pubkey_blob);
+  SSH_STRING_FREE(pubkey_blob);
   if (rc != 0) {
       goto error;
   }

src/ecdh_crypto.c

@@ -101,7 +101,7 @@ int ssh_client_ecdh_init(ssh_session session){
   rc = ssh_buffer_add_ssh_string(session->out_buffer,client_pubkey);
   if (rc < 0) {
       EC_KEY_free(key);
-      ssh_string_free(client_pubkey);
+      SSH_STRING_FREE(client_pubkey);
       return SSH_ERROR;
   }
 
@@ -181,9 +181,9 @@ int ecdh_build_k(ssh_session session) {
   session->next_crypto->ecdh_privkey = NULL;
 
 #ifdef DEBUG_CRYPTO
-    ssh_print_hexa("Session server cookie",
+    ssh_log_hexdump("Session server cookie",
                    session->next_crypto->server_kex.cookie, 16);
-    ssh_print_hexa("Session client cookie",
+    ssh_log_hexdump("Session client cookie",
                    session->next_crypto->client_kex.cookie, 16);
     ssh_print_bignum("Shared secret key", session->next_crypto->shared_secret);
 #endif
@@ -206,6 +206,7 @@ SSH_PACKET_CALLBACK(ssh_packet_server_ecdh_init){
     bignum_CTX ctx;
     /* SSH host keys (rsa,dsa,ecdsa) */
     ssh_key privkey;
+    enum ssh_digest_e digest = SSH_DIGEST_AUTO;
     ssh_string sig_blob = NULL;
     ssh_string pubkey_blob = NULL;
     int curve;
@@ -277,7 +278,7 @@ SSH_PACKET_CALLBACK(ssh_packet_server_ecdh_init){
     }
 
     /* privkey is not allocated */
-    rc = ssh_get_key_params(session, &privkey);
+    rc = ssh_get_key_params(session, &privkey, &digest);
     if (rc == SSH_ERROR) {
         goto error;
     }
@@ -288,7 +289,7 @@ SSH_PACKET_CALLBACK(ssh_packet_server_ecdh_init){
         goto error;
     }
 
-    sig_blob = ssh_srv_pki_do_sign_sessionid(session, privkey);
+    sig_blob = ssh_srv_pki_do_sign_sessionid(session, privkey, digest);
     if (sig_blob == NULL) {
         ssh_set_error(session, SSH_FATAL, "Could not sign the session id");
         goto error;
@@ -297,7 +298,7 @@ SSH_PACKET_CALLBACK(ssh_packet_server_ecdh_init){
     rc = ssh_dh_get_next_server_publickey_blob(session, &pubkey_blob);
     if (rc != SSH_OK) {
         ssh_set_error(session, SSH_FATAL, "Could not export server public key");
-        ssh_string_free(sig_blob);
+        SSH_STRING_FREE(sig_blob);
         return SSH_ERROR;
     }
 
@@ -308,8 +309,8 @@ SSH_PACKET_CALLBACK(ssh_packet_server_ecdh_init){
                          q_s_string, /* ecdh public key */
                          sig_blob); /* signature blob */
 
-    ssh_string_free(sig_blob);
-    ssh_string_free(pubkey_blob);
+    SSH_STRING_FREE(sig_blob);
+    SSH_STRING_FREE(pubkey_blob);
 
     if (rc != SSH_OK) {
         ssh_set_error_oom(session);

src/ecdh_gcrypt.c

@@ -115,7 +115,7 @@ int ssh_client_ecdh_init(ssh_session session)
  out:
     gcry_sexp_release(param);
     gcry_sexp_release(key);
-    ssh_string_free(client_pubkey);
+    SSH_STRING_FREE(client_pubkey);
     return rc;
 }
 
@@ -215,13 +215,13 @@ int ecdh_build_k(ssh_session session)
         k_len = 133;
     } else {
         ssh_string_burn(s);
-        ssh_string_free(s);
+        SSH_STRING_FREE(s);
         goto out;
     }
 
     if (ssh_string_len(s) != k_len) {
         ssh_string_burn(s);
-        ssh_string_free(s);
+        SSH_STRING_FREE(s);
         goto out;
     }
 
@@ -231,7 +231,7 @@ int ecdh_build_k(ssh_session session)
                         k_len / 2,
                         NULL);
     ssh_string_burn(s);
-    ssh_string_free(s);
+    SSH_STRING_FREE(s);
     if (err) {
         goto out;
     }
@@ -242,9 +242,9 @@ int ecdh_build_k(ssh_session session)
     session->next_crypto->ecdh_privkey = NULL;
 
 #ifdef DEBUG_CRYPTO
-    ssh_print_hexa("Session server cookie",
+    ssh_log_hexdump("Session server cookie",
                    session->next_crypto->server_kex.cookie, 16);
-    ssh_print_hexa("Session client cookie",
+    ssh_log_hexdump("Session client cookie",
                    session->next_crypto->client_kex.cookie, 16);
     ssh_print_bignum("Shared secret key", session->next_crypto->shared_secret);
 #endif
@@ -254,7 +254,7 @@ int ecdh_build_k(ssh_session session)
     gcry_sexp_release(data);
     gcry_sexp_release(result);
     ssh_string_burn(privkey);
-    ssh_string_free(privkey);
+    SSH_STRING_FREE(privkey);
     return rc;
 }
 
@@ -273,6 +273,7 @@ SSH_PACKET_CALLBACK(ssh_packet_server_ecdh_init){
     gcry_sexp_t key = NULL;
     /* SSH host keys (rsa,dsa,ecdsa) */
     ssh_key privkey;
+    enum ssh_digest_e digest = SSH_DIGEST_AUTO;
     ssh_string sig_blob = NULL;
     ssh_string pubkey_blob = NULL;
     int rc = SSH_ERROR;
@@ -325,7 +326,7 @@ SSH_PACKET_CALLBACK(ssh_packet_server_ecdh_init){
     }
 
     /* privkey is not allocated */
-    rc = ssh_get_key_params(session, &privkey);
+    rc = ssh_get_key_params(session, &privkey, &digest);
     if (rc != SSH_OK) {
         goto out;
     }
@@ -336,7 +337,7 @@ SSH_PACKET_CALLBACK(ssh_packet_server_ecdh_init){
         goto out;
     }
 
-    sig_blob = ssh_srv_pki_do_sign_sessionid(session, privkey);
+    sig_blob = ssh_srv_pki_do_sign_sessionid(session, privkey, digest);
     if (sig_blob == NULL) {
         ssh_set_error(session, SSH_FATAL, "Could not sign the session id");
         rc = SSH_ERROR;
@@ -346,7 +347,7 @@ SSH_PACKET_CALLBACK(ssh_packet_server_ecdh_init){
     rc = ssh_dh_get_next_server_publickey_blob(session, &pubkey_blob);
     if (rc != SSH_OK) {
         ssh_set_error(session, SSH_FATAL, "Could not export server public key");
-        ssh_string_free(sig_blob);
+        SSH_STRING_FREE(sig_blob);
         goto out;
     }
 
@@ -357,8 +358,8 @@ SSH_PACKET_CALLBACK(ssh_packet_server_ecdh_init){
                          q_s_string, /* ecdh public key */
                          sig_blob); /* signature blob */
 
-    ssh_string_free(sig_blob);
-    ssh_string_free(pubkey_blob);
+    SSH_STRING_FREE(sig_blob);
+    SSH_STRING_FREE(pubkey_blob);
 
     if (rc != SSH_OK) {
         ssh_set_error_oom(session);

src/ecdh_mbedcrypto.c

@@ -113,7 +113,7 @@ int ssh_client_ecdh_init(ssh_session session)
 
 out:
     mbedtls_ecp_group_free(&grp);
-    ssh_string_free(client_pubkey);
+    SSH_STRING_FREE(client_pubkey);
 
     return rc;
 }
@@ -188,6 +188,7 @@ SSH_PACKET_CALLBACK(ssh_packet_server_ecdh_init){
     ssh_string q_s_string = NULL;
     mbedtls_ecp_group grp;
     ssh_key privkey = NULL;
+    enum ssh_digest_e digest = SSH_DIGEST_AUTO;
     ssh_string sig_blob = NULL;
     ssh_string pubkey_blob = NULL;
     int rc;
@@ -250,7 +251,7 @@ SSH_PACKET_CALLBACK(ssh_packet_server_ecdh_init){
     }
 
     /* privkey is not allocated */
-    rc = ssh_get_key_params(session, &privkey);
+    rc = ssh_get_key_params(session, &privkey, &digest);
     if (rc == SSH_ERROR) {
         rc = SSH_ERROR;
         goto out;
@@ -263,7 +264,7 @@ SSH_PACKET_CALLBACK(ssh_packet_server_ecdh_init){
         goto out;
     }
 
-    sig_blob = ssh_srv_pki_do_sign_sessionid(session, privkey);
+    sig_blob = ssh_srv_pki_do_sign_sessionid(session, privkey, digest);
     if (sig_blob == NULL) {
         ssh_set_error(session, SSH_FATAL, "Could not sign the session id");
         rc = SSH_ERROR;
@@ -273,7 +274,7 @@ SSH_PACKET_CALLBACK(ssh_packet_server_ecdh_init){
     rc = ssh_dh_get_next_server_publickey_blob(session, &pubkey_blob);
     if (rc != SSH_OK) {
         ssh_set_error(session, SSH_FATAL, "Could not export server public key");
-        ssh_string_free(sig_blob);
+        SSH_STRING_FREE(sig_blob);
         goto out;
     }
 
@@ -283,8 +284,8 @@ SSH_PACKET_CALLBACK(ssh_packet_server_ecdh_init){
                          q_s_string, /* ecdh public key */
                          sig_blob); /* signature blob */
 
-    ssh_string_free(sig_blob);
-    ssh_string_free(pubkey_blob);
+    SSH_STRING_FREE(sig_blob);
+    SSH_STRING_FREE(pubkey_blob);
 
     if (rc != SSH_OK) {
         ssh_set_error_oom(session);

src/external/fe25519.c

@@ -120,10 +120,10 @@ void fe25519_pack(unsigned char r[32], const fe25519 *x)
     }
 }
 
-int fe25519_iszero(const fe25519 *x)
+uint32_t fe25519_iszero(const fe25519 *x)
 {
     int i;
-    int r;
+    uint32_t r;
 
     fe25519 t = *x;
     fe25519_freeze(&t);

src/external/sc25519.c

@@ -223,7 +223,7 @@ int sc25519_lt_vartime(const sc25519 *x, const sc25519 *y)
 
 void sc25519_add(sc25519 *r, const sc25519 *x, const sc25519 *y)
 {
-    int i, carry;
+    uint32_t i, carry;
 
     for (i = 0; i < 32; i++) {
         r->v[i] = x->v[i] + y->v[i];
@@ -253,7 +253,7 @@ void sc25519_sub_nored(sc25519 *r, const sc25519 *x, const sc25519 *y)
 
 void sc25519_mul(sc25519 *r, const sc25519 *x, const sc25519 *y)
 {
-    int i,j,carry;
+    uint32_t i,j,carry;
     uint32_t t[64];
 
     for (i = 0; i < 64; i++) {

src/gssapi.c

@@ -208,7 +208,7 @@ int ssh_gssapi_handle_userauth(ssh_session session, const char *user, uint32_t n
                 return SSH_ERROR;
             session->gssapi->state = SSH_GSSAPI_STATE_RCV_TOKEN;
             rc = ssh_gssapi_send_response(session, oid_s);
-            ssh_string_free(oid_s);
+            SSH_STRING_FREE(oid_s);
             return rc;
         } else {
             return ssh_auth_reply_default(session,0);
@@ -235,6 +235,10 @@ int ssh_gssapi_handle_userauth(ssh_session session, const char *user, uint32_t n
     for (i=0 ; i< n_oid ; ++i){
         unsigned char *oid_s = (unsigned char *) ssh_string_data(oids[i]);
         size_t len = ssh_string_len(oids[i]);
+
+        if (oid_s == NULL) {
+            continue;
+        }
         if(len < 2 || oid_s[0] != SSH_OID_TAG || ((size_t)oid_s[1]) != len - 2){
             SSH_LOG(SSH_LOG_WARNING,"GSSAPI: received invalid OID");
             continue;
@@ -293,6 +297,10 @@ int ssh_gssapi_handle_userauth(ssh_session session, const char *user, uint32_t n
     for (i=0 ; i< n_oid ; ++i){
         unsigned char *oid_s = (unsigned char *) ssh_string_data(oids[i]);
         size_t len = ssh_string_len(oids[i]);
+
+        if (oid_s == NULL) {
+            continue;
+        }
         if(len < 2 || oid_s[0] != SSH_OID_TAG || ((size_t)oid_s[1]) != len - 2){
             SSH_LOG(SSH_LOG_WARNING,"GSSAPI: received invalid OID");
             continue;
@@ -384,7 +392,7 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_token_server){
                 return SSH_PACKET_USED;
             }
             ssh_packet_send(session);
-            ssh_string_free(out_token);
+            SSH_STRING_FREE(out_token);
         } else {
             session->gssapi->state = SSH_GSSAPI_STATE_RCV_MIC;
         }
@@ -403,7 +411,7 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_token_server){
                          "accepting token",
                          maj_stat,
                          min_stat);
-    ssh_string_free(token);
+    SSH_STRING_FREE(token);
     if (client_name != GSS_C_NO_NAME){
         session->gssapi->client_name = client_name;
         session->gssapi->canonic_user = ssh_gssapi_name_to_char(client_name);
@@ -444,13 +452,17 @@ static ssh_buffer ssh_gssapi_build_mic(ssh_session session)
     ssh_buffer mic_buffer = NULL;
     int rc;
 
+    crypto = ssh_packet_get_current_crypto(session, SSH_DIRECTION_BOTH);
+    if (crypto == NULL) {
+        return NULL;
+    }
+
     mic_buffer = ssh_buffer_new();
     if (mic_buffer == NULL) {
         ssh_set_error_oom(session);
         return NULL;
     }
 
-    crypto = ssh_packet_get_current_crypto(session, SSH_DIRECTION_BOTH);
     rc = ssh_buffer_pack(mic_buffer,
                          "dPbsss",
                          crypto->digest_len,
@@ -461,7 +473,7 @@ static ssh_buffer ssh_gssapi_build_mic(ssh_session session)
                          "gssapi-with-mic");
     if (rc != SSH_OK) {
         ssh_set_error_oom(session);
-        ssh_buffer_free(mic_buffer);
+        SSH_BUFFER_FREE(mic_buffer);
         return NULL;
     }
 
@@ -545,10 +557,10 @@ error:
 end:
     ssh_gssapi_free(session);
     if (mic_buffer != NULL) {
-        ssh_buffer_free(mic_buffer);
+        SSH_BUFFER_FREE(mic_buffer);
     }
     if (mic_token != NULL) {
-        ssh_string_free(mic_token);
+        SSH_STRING_FREE(mic_token);
     }
 
     return SSH_PACKET_USED;
@@ -700,13 +712,13 @@ end:
  *                            later.
  */
 int ssh_gssapi_auth_mic(ssh_session session){
-    int i;
+    size_t i;
     gss_OID_set selected; /* oid selected for authentication */
-    ssh_string *oids;
+    ssh_string *oids = NULL;
     int rc;
-    int n_oids = 0;
+    size_t n_oids = 0;
     OM_uint32 maj_stat, min_stat;
-    char name_buf[256];
+    char name_buf[256] = {0};
     gss_buffer_desc hostname;
     const char *gss_host = session->opts.host;
 
@@ -750,7 +762,7 @@ int ssh_gssapi_auth_mic(ssh_session session){
     }
 
     n_oids = selected->count;
-    SSH_LOG(SSH_LOG_PROTOCOL, "Sending %d oids", n_oids);
+    SSH_LOG(SSH_LOG_PROTOCOL, "Sending %zu oids", n_oids);
 
     oids = calloc(n_oids, sizeof(ssh_string));
     if (oids == NULL) {
@@ -760,6 +772,11 @@ int ssh_gssapi_auth_mic(ssh_session session){
 
     for (i=0; i<n_oids; ++i){
         oids[i] = ssh_string_new(selected->elements[i].length + 2);
+        if (oids[i] == NULL) {
+            ssh_set_error_oom(session);
+            rc = SSH_ERROR;
+            goto out;
+        }
         ((unsigned char *)oids[i]->data)[0] = SSH_OID_TAG;
         ((unsigned char *)oids[i]->data)[1] = selected->elements[i].length;
         memcpy((unsigned char *)oids[i]->data + 2, selected->elements[i].elements,
@@ -767,8 +784,10 @@ int ssh_gssapi_auth_mic(ssh_session session){
     }
 
     rc = ssh_gssapi_send_auth_mic(session, oids, n_oids);
+
+out:
     for (i = 0; i < n_oids; i++) {
-        ssh_string_free(oids[i]);
+        SSH_STRING_FREE(oids[i]);
     }
     free(oids);
     if (rc != SSH_ERROR) {
@@ -778,13 +797,13 @@ int ssh_gssapi_auth_mic(ssh_session session){
     return SSH_AUTH_ERROR;
 }
 
-static gss_OID ssh_gssapi_oid_from_string(ssh_string oid_s){
-    gss_OID ret;
+static gss_OID ssh_gssapi_oid_from_string(ssh_string oid_s)
+{
+    gss_OID ret = NULL;
     unsigned char *data = ssh_string_data(oid_s);
     size_t len = ssh_string_len(oid_s);
 
-    ret = malloc(sizeof(gss_OID_desc));
-    if (ret == NULL) {
+    if (data == NULL) {
         return NULL;
     }
 
@@ -792,10 +811,17 @@ static gss_OID ssh_gssapi_oid_from_string(ssh_string oid_s){
         SAFE_FREE(ret);
         return NULL;
     }
+
     if (data[0] != SSH_OID_TAG || data[1] != len - 2) {
         SAFE_FREE(ret);
         return NULL;
     }
+
+    ret = malloc(sizeof(gss_OID_desc));
+    if (ret == NULL) {
+        return NULL;
+    }
+
     ret->elements = malloc(len - 2);
     if (ret->elements == NULL) {
         SAFE_FREE(ret);
@@ -828,7 +854,7 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_response){
         goto error;
     }
     session->gssapi->client.oid = ssh_gssapi_oid_from_string(oid_s);
-    ssh_string_free(oid_s);
+    SSH_STRING_FREE(oid_s);
     if (!session->gssapi->client.oid) {
         ssh_set_error(session, SSH_FATAL, "Invalid OID");
         goto error;
@@ -896,7 +922,7 @@ static int ssh_gssapi_send_mic(ssh_session session){
     maj_stat = gss_get_mic(&min_stat,session->gssapi->ctx, GSS_C_QOP_DEFAULT,
                            &mic_buf, &mic_token_buf);
     if (GSS_ERROR(maj_stat)){
-        ssh_buffer_free(mic_buffer);
+        SSH_BUFFER_FREE(mic_buffer);
         ssh_gssapi_log_error(SSH_LOG_PROTOCOL,
                              "generating MIC",
                              maj_stat,
@@ -910,7 +936,7 @@ static int ssh_gssapi_send_mic(ssh_session session){
                          mic_token_buf.length,
                          (size_t)mic_token_buf.length, mic_token_buf.value);
     if (rc != SSH_OK) {
-        ssh_buffer_free(mic_buffer);
+        SSH_BUFFER_FREE(mic_buffer);
         ssh_set_error_oom(session);
         return SSH_ERROR;
     }
@@ -958,7 +984,7 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_token_client){
                          "accepting token",
                          maj_stat,
                          min_stat);
-    ssh_string_free(token);
+    SSH_STRING_FREE(token);
     if (GSS_ERROR(maj_stat)){
         ssh_gssapi_log_error(SSH_LOG_PROTOCOL,
                              "Gssapi error",

src/gzip.c

@@ -90,14 +90,14 @@ static ssh_buffer gzip_compress(ssh_session session, ssh_buffer source, int leve
     zout->avail_out = BLOCKSIZE;
     status = deflate(zout, Z_PARTIAL_FLUSH);
     if (status != Z_OK) {
-      ssh_buffer_free(dest);
+      SSH_BUFFER_FREE(dest);
       ssh_set_error(session, SSH_FATAL,
           "status %d deflating zlib packet", status);
       return NULL;
     }
     len = BLOCKSIZE - zout->avail_out;
     if (ssh_buffer_add_data(dest, out_buf, len) < 0) {
-      ssh_buffer_free(dest);
+      SSH_BUFFER_FREE(dest);
       return NULL;
     }
     zout->next_out = out_buf;
@@ -115,16 +115,16 @@ int compress_buffer(ssh_session session, ssh_buffer buf) {
   }
 
   if (ssh_buffer_reinit(buf) < 0) {
-    ssh_buffer_free(dest);
+    SSH_BUFFER_FREE(dest);
     return -1;
   }
 
   if (ssh_buffer_add_data(buf, ssh_buffer_get(dest), ssh_buffer_get_len(dest)) < 0) {
-    ssh_buffer_free(dest);
+    SSH_BUFFER_FREE(dest);
     return -1;
   }
 
-  ssh_buffer_free(dest);
+  SSH_BUFFER_FREE(dest);
   return 0;
 }
 
@@ -162,6 +162,10 @@ static ssh_buffer gzip_decompress(ssh_session session, ssh_buffer source, size_t
   int status;
 
   crypto = ssh_packet_get_current_crypto(session, SSH_DIRECTION_IN);
+  if (crypto == NULL) {
+      return NULL;
+  }
+
   zin = crypto->compress_in_ctx;
   if (zin == NULL) {
     zin = crypto->compress_in_ctx = initdecompress(session);
@@ -185,18 +189,18 @@ static ssh_buffer gzip_decompress(ssh_session session, ssh_buffer source, size_t
     if (status != Z_OK && status != Z_BUF_ERROR) {
       ssh_set_error(session, SSH_FATAL,
           "status %d inflating zlib packet", status);
-      ssh_buffer_free(dest);
+      SSH_BUFFER_FREE(dest);
       return NULL;
     }
 
     len = BLOCKSIZE - zin->avail_out;
     if (ssh_buffer_add_data(dest,out_buf,len) < 0) {
-      ssh_buffer_free(dest);
+      SSH_BUFFER_FREE(dest);
       return NULL;
     }
     if (ssh_buffer_get_len(dest) > maxlen){
       /* Size of packet exceeded, avoid a denial of service attack */
-      ssh_buffer_free(dest);
+      SSH_BUFFER_FREE(dest);
       return NULL;
     }
     zin->next_out = out_buf;
@@ -214,15 +218,15 @@ int decompress_buffer(ssh_session session,ssh_buffer buf, size_t maxlen){
   }
 
   if (ssh_buffer_reinit(buf) < 0) {
-    ssh_buffer_free(dest);
+    SSH_BUFFER_FREE(dest);
     return -1;
   }
 
   if (ssh_buffer_add_data(buf, ssh_buffer_get(dest), ssh_buffer_get_len(dest)) < 0) {
-    ssh_buffer_free(dest);
+    SSH_BUFFER_FREE(dest);
     return -1;
   }
 
-  ssh_buffer_free(dest);
+  SSH_BUFFER_FREE(dest);
   return 0;
 }

src/kex.c

@@ -159,8 +159,6 @@
     GEX_SHA1 \
     KEY_EXCHANGE
 
-#define KEX_METHODS_SIZE 10
-
 /* RFC 8308 */
 #define KEX_EXTENSION_CLIENT "ext-info-c"
 
@@ -257,7 +255,7 @@ static const char *ssh_kex_descriptions[] = {
 
 const char *ssh_kex_get_default_methods(uint32_t algo)
 {
-    if (algo >= KEX_METHODS_SIZE) {
+    if (algo >= SSH_KEX_METHODS) {
         return NULL;
     }
 
@@ -266,7 +264,7 @@ const char *ssh_kex_get_default_methods(uint32_t algo)
 
 const char *ssh_kex_get_supported_method(uint32_t algo)
 {
-    if (algo >= KEX_METHODS_SIZE) {
+    if (algo >= SSH_KEX_METHODS) {
         return NULL;
     }
 
@@ -274,7 +272,7 @@ const char *ssh_kex_get_supported_method(uint32_t algo)
 }
 
 const char *ssh_kex_get_description(uint32_t algo) {
-  if (algo >= KEX_METHODS_SIZE) {
+  if (algo >= SSH_KEX_METHODS) {
     return NULL;
   }
 
@@ -282,7 +280,7 @@ const char *ssh_kex_get_description(uint32_t algo) {
 }
 
 const char *ssh_kex_get_fips_methods(uint32_t algo) {
-  if (algo >= KEX_METHODS_SIZE) {
+  if (algo >= SSH_KEX_METHODS) {
     return NULL;
   }
 
@@ -333,9 +331,10 @@ SSH_PACKET_CALLBACK(ssh_packet_kexinit)
     int i, ok;
     int server_kex = session->server;
     ssh_string str = NULL;
-    char *strings[KEX_METHODS_SIZE] = {0};
+    char *strings[SSH_KEX_METHODS] = {0};
     char *rsa_sig_ext = NULL;
     int rc = SSH_ERROR;
+    size_t len;
 
     uint8_t first_kex_packet_follows = 0;
     uint32_t kexinit_reserved = 0;
@@ -351,32 +350,32 @@ SSH_PACKET_CALLBACK(ssh_packet_kexinit)
     }
 
     if (server_kex) {
-        rc = ssh_buffer_get_data(packet,session->next_crypto->client_kex.cookie, 16);
-        if (rc != 16) {
+        len = ssh_buffer_get_data(packet,session->next_crypto->client_kex.cookie, 16);
+        if (len != 16) {
             ssh_set_error(session, SSH_FATAL, "ssh_packet_kexinit: no cookie in packet");
             goto error;
         }
 
-        rc = ssh_hashbufin_add_cookie(session, session->next_crypto->client_kex.cookie);
-        if (rc < 0) {
+        len = ssh_hashbufin_add_cookie(session, session->next_crypto->client_kex.cookie);
+        if (len < 0) {
             ssh_set_error(session, SSH_FATAL, "ssh_packet_kexinit: adding cookie failed");
             goto error;
         }
     } else {
-        rc = ssh_buffer_get_data(packet,session->next_crypto->server_kex.cookie, 16);
-        if (rc != 16) {
+        len = ssh_buffer_get_data(packet,session->next_crypto->server_kex.cookie, 16);
+        if (len != 16) {
             ssh_set_error(session, SSH_FATAL, "ssh_packet_kexinit: no cookie in packet");
             goto error;
         }
 
-        rc = ssh_hashbufin_add_cookie(session, session->next_crypto->server_kex.cookie);
-        if (rc < 0) {
+        len = ssh_hashbufin_add_cookie(session, session->next_crypto->server_kex.cookie);
+        if (len < 0) {
             ssh_set_error(session, SSH_FATAL, "ssh_packet_kexinit: adding cookie failed");
             goto error;
         }
     }
 
-    for (i = 0; i < KEX_METHODS_SIZE; i++) {
+    for (i = 0; i < SSH_KEX_METHODS; i++) {
         str = ssh_buffer_get_ssh_string(packet);
         if (str == NULL) {
           goto error;
@@ -393,7 +392,7 @@ SSH_PACKET_CALLBACK(ssh_packet_kexinit)
             ssh_set_error_oom(session);
             goto error;
         }
-        ssh_string_free(str);
+        SSH_STRING_FREE(str);
         str = NULL;
     }
 
@@ -528,7 +527,7 @@ SSH_PACKET_CALLBACK(ssh_packet_kexinit)
     return SSH_PACKET_USED;
 
 error:
-    ssh_string_free(str);
+    SSH_STRING_FREE(str);
     for (i = 0; i < SSH_KEX_METHODS; i++) {
         if (server_kex) {
             session->next_crypto->client_kex.methods[i] = NULL;
@@ -547,7 +546,7 @@ void ssh_list_kex(struct ssh_kex_struct *kex) {
   int i = 0;
 
 #ifdef DEBUG_CRYPTO
-  ssh_print_hexa("session cookie", kex->cookie, 16);
+  ssh_log_hexdump("session cookie", kex->cookie, 16);
 #endif
 
   for(i = 0; i < SSH_KEX_METHODS; i++) {
@@ -561,103 +560,94 @@ void ssh_list_kex(struct ssh_kex_struct *kex) {
 
 /**
  * @internal
+ *
  * @brief selects the hostkey mechanisms to be chosen for the key exchange,
- * as some hostkey mechanisms may be present in known_hosts file and preferred
+ * as some hostkey mechanisms may be present in known_hosts files.
+ *
  * @returns a cstring containing a comma-separated list of hostkey methods.
  *          NULL if no method matches
  */
 char *ssh_client_select_hostkeys(ssh_session session)
 {
-    char methods_buffer[128]={0};
-    char tail_buffer[128]={0};
+    const char *wanted = NULL;
+    char *wanted_without_certs = NULL;
+    char *known_hosts_algorithms = NULL;
+    char *known_hosts_ordered = NULL;
     char *new_hostkeys = NULL;
-    static const char *preferred_hostkeys[] = {
-        "ssh-ed25519",
-        "ecdsa-sha2-nistp521",
-        "ecdsa-sha2-nistp384",
-        "ecdsa-sha2-nistp256",
-        "rsa-sha2-512",
-        "rsa-sha2-256",
-        "ssh-rsa",
-#ifdef HAVE_DSA
-        "ssh-dss",
-#endif
-        NULL
-    };
-    struct ssh_list *algo_list = NULL;
-    struct ssh_iterator *it = NULL;
-    size_t algo_count;
-    int needcomma = 0;
-    size_t i, len;
+    char *fips_hostkeys = NULL;
 
-    algo_list = ssh_known_hosts_get_algorithms(session);
-    if (algo_list == NULL) {
+    wanted = session->opts.wanted_methods[SSH_HOSTKEYS];
+    if (wanted == NULL) {
+        if (ssh_fips_mode()) {
+            wanted = ssh_kex_get_fips_methods(SSH_HOSTKEYS);
+        } else {
+            wanted = ssh_kex_get_default_methods(SSH_HOSTKEYS);
+        }
+    }
+
+    /* This removes the certificate types, unsupported for now */
+    wanted_without_certs = ssh_find_all_matching(HOSTKEYS, wanted);
+    if (wanted_without_certs == NULL) {
+        SSH_LOG(SSH_LOG_WARNING,
+                "List of allowed host key algorithms is empty or contains only "
+                "unsupported algorithms");
         return NULL;
     }
 
-    algo_count = ssh_list_count(algo_list);
-    if (algo_count == 0) {
-        ssh_list_free(algo_list);
-        return NULL;
-    }
+    SSH_LOG(SSH_LOG_DEBUG,
+            "Order of wanted host keys: \"%s\"",
+            wanted_without_certs);
 
-    for (i = 0; preferred_hostkeys[i] != NULL; ++i) {
-        bool found = false;
-        /* This is a signature type: We list also the SHA2 extensions */
-        enum ssh_keytypes_e base_preferred =
-            ssh_key_type_from_signature_name(preferred_hostkeys[i]);
-
-        for (it = ssh_list_get_iterator(algo_list);
-             it != NULL;
-             it = it->next) {
-            const char *algo = ssh_iterator_value(const char *, it);
-            /* This is always key type so we do not have to care for the
-             * SHA2 extension */
-            enum ssh_keytypes_e base_algo = ssh_key_type_from_name(algo);
-
-            if (base_preferred == base_algo) {
-                /* Matching the keys already verified it is a known type */
-                if (needcomma) {
-                    strncat(methods_buffer,
-                            ",",
-                            sizeof(methods_buffer) - strlen(methods_buffer) - 1);
-                }
-                strncat(methods_buffer,
-                        preferred_hostkeys[i],
-                        sizeof(methods_buffer) - strlen(methods_buffer) - 1);
-                needcomma = 1;
-                found = true;
-            }
-        }
-        /* Collect the rest of the algorithms in other buffer, that will
-         * follow the preferred buffer. This will signalize all the algorithms
-         * we are willing to accept.
-         */
-        if (!found) {
-            snprintf(tail_buffer + strlen(tail_buffer),
-                     sizeof(tail_buffer) - strlen(tail_buffer),
-                     ",%s", preferred_hostkeys[i]);
-        }
-    }
-    ssh_list_free(algo_list);
-
-    if (strlen(methods_buffer) == 0) {
+    known_hosts_algorithms = ssh_known_hosts_get_algorithms_names(session);
+    if (known_hosts_algorithms == NULL) {
         SSH_LOG(SSH_LOG_DEBUG,
-                "No supported kex method for existing key in known_hosts file");
-        return NULL;
+                "No key found in known_hosts; "
+                "changing host key method to \"%s\"",
+                wanted_without_certs);
+
+        return wanted_without_certs;
     }
 
-    /* Append the supported list to the preferred.
-     * The length is maximum 128 + 128 + 1, which will not overflow
-     */
-    len = strlen(methods_buffer) + strlen(tail_buffer) + 1;
-    new_hostkeys = malloc(len);
+    SSH_LOG(SSH_LOG_DEBUG,
+            "Algorithms found in known_hosts files: \"%s\"",
+            known_hosts_algorithms);
+
+    /* Filter and order the keys from known_hosts according to wanted list */
+    known_hosts_ordered = ssh_find_all_matching(known_hosts_algorithms,
+                                                wanted_without_certs);
+    SAFE_FREE(known_hosts_algorithms);
+    if (known_hosts_ordered == NULL) {
+        SSH_LOG(SSH_LOG_DEBUG,
+                "No key found in known_hosts is allowed; "
+                "changing host key method to \"%s\"",
+                wanted_without_certs);
+
+        return wanted_without_certs;
+    }
+
+    /* Append the other supported keys after the preferred ones
+     * This function tolerates NULL pointers in parameters */
+    new_hostkeys = ssh_append_without_duplicates(known_hosts_ordered,
+                                                 wanted_without_certs);
+    SAFE_FREE(known_hosts_ordered);
+    SAFE_FREE(wanted_without_certs);
     if (new_hostkeys == NULL) {
         ssh_set_error_oom(session);
         return NULL;
     }
-    snprintf(new_hostkeys, len,
-             "%s%s", methods_buffer, tail_buffer);
+
+    if (ssh_fips_mode()) {
+        /* Filter out algorithms not allowed in FIPS mode */
+        fips_hostkeys = ssh_keep_fips_algos(SSH_HOSTKEYS, new_hostkeys);
+        SAFE_FREE(new_hostkeys);
+        if (fips_hostkeys == NULL) {
+            SSH_LOG(SSH_LOG_WARNING,
+                    "None of the wanted host keys or keys in known_hosts files "
+                    "is allowed in FIPS mode.");
+            return NULL;
+        }
+        new_hostkeys = fips_hostkeys;
+    }
 
     SSH_LOG(SSH_LOG_DEBUG,
             "Changing host key method to \"%s\"",
@@ -672,7 +662,7 @@ char *ssh_client_select_hostkeys(ssh_session session)
  */
 int ssh_set_client_kex(ssh_session session)
 {
-    struct ssh_kex_struct *client= &session->next_crypto->client_kex;
+    struct ssh_kex_struct *client = &session->next_crypto->client_kex;
     const char *wanted;
     char *kex = NULL;
     char *kex_tmp = NULL;
@@ -686,15 +676,23 @@ int ssh_set_client_kex(ssh_session session)
         return SSH_ERROR;
     }
 
-    memset(client->methods, 0, KEX_METHODS_SIZE * sizeof(char **));
-    /* first check if we have specific host key methods */
-    if (session->opts.wanted_methods[SSH_HOSTKEYS] == NULL) {
-    	/* Only if no override */
-    	session->opts.wanted_methods[SSH_HOSTKEYS] =
-            ssh_client_select_hostkeys(session);
-    }
+    memset(client->methods, 0, SSH_KEX_METHODS * sizeof(char **));
+
+    /* Set the list of allowed algorithms in order of preference, if it hadn't
+     * been set yet. */
+    for (i = 0; i < SSH_KEX_METHODS; i++) {
+        if (i == SSH_HOSTKEYS) {
+            /* Set the hostkeys in the following order:
+             * - First: keys present in known_hosts files ordered by preference
+             * - Next: other wanted algorithms ordered by preference */
+            client->methods[i] = ssh_client_select_hostkeys(session);
+            if (client->methods[i] == NULL) {
+                ssh_set_error_oom(session);
+                return SSH_ERROR;
+            }
+            continue;
+        }
 
-    for (i = 0; i < KEX_METHODS_SIZE; i++) {
         wanted = session->opts.wanted_methods[i];
         if (wanted == NULL) {
             if (ssh_fips_mode()) {
@@ -751,7 +749,7 @@ int ssh_kex_select_methods (ssh_session session){
         ext_start[0] = '\0';
     }
 
-    for (i = 0; i < KEX_METHODS_SIZE; i++) {
+    for (i = 0; i < SSH_KEX_METHODS; i++) {
         session->next_crypto->kex_methods[i]=ssh_find_matching(server->methods[i],client->methods[i]);
         if(session->next_crypto->kex_methods[i] == NULL && i < SSH_LANG_C_S){
             ssh_set_error(session,SSH_FATAL,"kex error : no match for method %s: server [%s], client [%s]",
@@ -824,7 +822,7 @@ int ssh_send_kex(ssh_session session, int server_kex) {
 
   ssh_list_kex(kex);
 
-  for (i = 0; i < KEX_METHODS_SIZE; i++) {
+  for (i = 0; i < SSH_KEX_METHODS; i++) {
     str = ssh_string_from_char(kex->methods[i]);
     if (str == NULL) {
       goto error;
@@ -836,7 +834,7 @@ int ssh_send_kex(ssh_session session, int server_kex) {
     if (ssh_buffer_add_ssh_string(session->out_buffer, str) < 0) {
       goto error;
     }
-    ssh_string_free(str);
+    SSH_STRING_FREE(str);
     str = NULL;
   }
 
@@ -857,7 +855,7 @@ int ssh_send_kex(ssh_session session, int server_kex) {
 error:
   ssh_buffer_reinit(session->out_buffer);
   ssh_buffer_reinit(session->out_hashbuf);
-  ssh_string_free(str);
+  SSH_STRING_FREE(str);
 
   return -1;
 }
@@ -1020,7 +1018,7 @@ int ssh_make_sessionid(ssh_session session)
                          ssh_buffer_get_len(server_hash),
                          ssh_buffer_get(server_hash),
                          server_pubkey_blob);
-    ssh_string_free(server_pubkey_blob);
+    SSH_STRING_FREE(server_pubkey_blob);
     if(rc != SSH_OK){
         goto error;
     }
@@ -1120,7 +1118,7 @@ int ssh_make_sessionid(ssh_session session)
     }
 
 #ifdef DEBUG_CRYPTO
-    ssh_print_hexa("hash buffer", ssh_buffer_get(buf), ssh_buffer_get_len(buf));
+    ssh_log_hexdump("hash buffer", ssh_buffer_get(buf), ssh_buffer_get_len(buf));
 #endif
 
     switch (session->next_crypto->kex_type) {
@@ -1196,20 +1194,20 @@ int ssh_make_sessionid(ssh_session session)
     }
 #ifdef DEBUG_CRYPTO
     printf("Session hash: \n");
-    ssh_print_hexa("secret hash", session->next_crypto->secret_hash, session->next_crypto->digest_len);
-    ssh_print_hexa("session id", session->next_crypto->session_id, session->next_crypto->digest_len);
+    ssh_log_hexdump("secret hash", session->next_crypto->secret_hash, session->next_crypto->digest_len);
+    ssh_log_hexdump("session id", session->next_crypto->session_id, session->next_crypto->digest_len);
 #endif
 
     rc = SSH_OK;
 error:
-    ssh_buffer_free(buf);
-    ssh_buffer_free(client_hash);
-    ssh_buffer_free(server_hash);
+    SSH_BUFFER_FREE(buf);
+    SSH_BUFFER_FREE(client_hash);
+    SSH_BUFFER_FREE(server_hash);
 
     session->in_hashbuf = NULL;
     session->out_hashbuf = NULL;
 
-    ssh_string_free(num);
+    SSH_STRING_FREE(num);
 
     return rc;
 }
@@ -1384,22 +1382,22 @@ int ssh_generate_session_keys(ssh_session session)
     }
 
 #ifdef DEBUG_CRYPTO
-    ssh_print_hexa("Client to Server IV", IV_cli_to_srv, IV_len);
-    ssh_print_hexa("Server to Client IV", IV_srv_to_cli, IV_len);
-    ssh_print_hexa("Client to Server Encryption Key", enckey_cli_to_srv,
+    ssh_log_hexdump("Client to Server IV", IV_cli_to_srv, IV_len);
+    ssh_log_hexdump("Server to Client IV", IV_srv_to_cli, IV_len);
+    ssh_log_hexdump("Client to Server Encryption Key", enckey_cli_to_srv,
                    enckey_cli_to_srv_len);
-    ssh_print_hexa("Server to Client Encryption Key", enckey_srv_to_cli,
+    ssh_log_hexdump("Server to Client Encryption Key", enckey_srv_to_cli,
                    enckey_srv_to_cli_len);
-    ssh_print_hexa("Client to Server Integrity Key", intkey_cli_to_srv,
+    ssh_log_hexdump("Client to Server Integrity Key", intkey_cli_to_srv,
                    intkey_cli_to_srv_len);
-    ssh_print_hexa("Server to Client Integrity Key", intkey_srv_to_cli,
+    ssh_log_hexdump("Server to Client Integrity Key", intkey_srv_to_cli,
                    intkey_srv_to_cli_len);
 #endif
 
     rc = 0;
 error:
     ssh_string_burn(k_string);
-    ssh_string_free(k_string);
+    SSH_STRING_FREE(k_string);
     if (rc != 0) {
         free(IV_cli_to_srv);
         free(IV_srv_to_cli);

src/known_hosts.c

@@ -405,8 +405,12 @@ int ssh_is_server_known(ssh_session session)
 
     if ((ret == SSH_SERVER_NOT_KNOWN) &&
             (session->opts.StrictHostKeyChecking == 0)) {
-        ssh_write_knownhost(session);
-        ret = SSH_SERVER_KNOWN_OK;
+        int rv = ssh_session_update_known_hosts(session);
+        if (rv != SSH_OK) {
+            ret = SSH_SERVER_ERROR;
+        } else {
+            ret = SSH_SERVER_KNOWN_OK;
+        }
     }
 
     SAFE_FREE(host);
@@ -492,10 +496,12 @@ char * ssh_dump_knownhost(ssh_session session) {
  * @deprecated Please use ssh_session_update_known_hosts()
  * @brief This function is deprecated
  */
-int ssh_write_knownhost(ssh_session session) {
+int ssh_write_knownhost(ssh_session session)
+{
     FILE *file;
-    char *buffer;
+    char *buffer = NULL;
     char *dir;
+    int rc;
 
     if (session->opts.knownhosts == NULL) {
         if (ssh_options_apply(session) < 0) {
@@ -504,33 +510,45 @@ int ssh_write_knownhost(ssh_session session) {
         }
     }
 
-    /* Check if directory exists and create it if not */
-    dir = ssh_dirname(session->opts.knownhosts);
-    if (dir == NULL) {
-        ssh_set_error(session, SSH_FATAL, "%s", strerror(errno));
-        return SSH_ERROR;
-    }
+    errno = 0;
+    file = fopen(session->opts.knownhosts, "a");
+    if (file == NULL) {
+        if (errno == ENOENT) {
+            dir = ssh_dirname(session->opts.knownhosts);
+            if (dir == NULL) {
+                ssh_set_error(session, SSH_FATAL, "%s", strerror(errno));
+                return SSH_ERROR;
+            }
 
-    if (!ssh_file_readaccess_ok(dir)) {
-        if (ssh_mkdir(dir, 0700) < 0) {
-            ssh_set_error(session, SSH_FATAL,
-                    "Cannot create %s directory.", dir);
+            rc = ssh_mkdirs(dir, 0700);
+            if (rc < 0) {
+                ssh_set_error(session, SSH_FATAL,
+                              "Cannot create %s directory: %s",
+                              dir, strerror(errno));
+                SAFE_FREE(dir);
+                return SSH_ERROR;
+            }
             SAFE_FREE(dir);
+
+            errno = 0;
+            file = fopen(session->opts.knownhosts, "a");
+            if (file == NULL) {
+                ssh_set_error(session, SSH_FATAL,
+                              "Couldn't open known_hosts file %s"
+                              " for appending: %s",
+                              session->opts.knownhosts, strerror(errno));
+                return SSH_ERROR;
+            }
+        } else {
+            ssh_set_error(session, SSH_FATAL,
+                          "Couldn't open known_hosts file %s for appending: %s",
+                          session->opts.knownhosts, strerror(errno));
             return SSH_ERROR;
         }
     }
-    SAFE_FREE(dir);
 
-    file = fopen(session->opts.knownhosts, "a");
-    if (file == NULL) {
-        ssh_set_error(session, SSH_FATAL,
-                "Couldn't open known_hosts file %s for appending: %s",
-                session->opts.knownhosts, strerror(errno));
-        return SSH_ERROR;
-    }
-
-    buffer = ssh_dump_knownhost(session);
-    if (buffer == NULL) {
+    rc = ssh_session_export_known_hosts_entry(session, &buffer);
+    if (rc != SSH_OK) {
         fclose(file);
         return SSH_ERROR;
     }

src/knownhosts.c

@@ -42,6 +42,7 @@
 #include "libssh/pki.h"
 #include "libssh/dh.h"
 #include "libssh/knownhosts.h"
+#include "libssh/token.h"
 
 /**
  * @addtogroup libssh_session
@@ -128,8 +129,8 @@ static int match_hashed_hostname(const char *host, const char *hashed_host)
 
 error:
     free(hashed);
-    ssh_buffer_free(salt);
-    ssh_buffer_free(hash);
+    SSH_BUFFER_FREE(salt);
+    SSH_BUFFER_FREE(hash);
 
     return match;
 }
@@ -306,7 +307,7 @@ static char *ssh_session_get_host_port(ssh_session session)
     if (session->opts.host == NULL) {
         ssh_set_error(session,
                       SSH_FATAL,
-                      "Can't verify server inn known hosts if the host we "
+                      "Can't verify server in known hosts if the host we "
                       "should connect to has not been set");
 
         return NULL;
@@ -451,6 +452,146 @@ error:
     return NULL;
 }
 
+/**
+ * @internal
+ *
+ * @brief   Returns a static string containing a list of the signature types the
+ * given key type can generate.
+ *
+ * @returns A static cstring containing the signature types the key is able to
+ * generate separated by commas; NULL in case of error
+ */
+static const char *ssh_known_host_sigs_from_hostkey_type(enum ssh_keytypes_e type)
+{
+    switch (type) {
+    case SSH_KEYTYPE_RSA:
+        return "rsa-sha2-512,rsa-sha2-256,ssh-rsa";
+    case SSH_KEYTYPE_ED25519:
+        return "ssh-ed25519";
+#ifdef HAVE_DSA
+    case SSH_KEYTYPE_DSS:
+        return "ssh-dss";
+#endif
+#ifdef HAVE_ECDH
+    case SSH_KEYTYPE_ECDSA_P256:
+        return "ecdsa-sha2-nistp256";
+    case SSH_KEYTYPE_ECDSA_P384:
+        return "ecdsa-sha2-nistp384";
+    case SSH_KEYTYPE_ECDSA_P521:
+        return "ecdsa-sha2-nistp521";
+#endif
+    case SSH_KEYTYPE_UNKNOWN:
+    default:
+        SSH_LOG(SSH_LOG_WARN, "The given type %d is not a base private key type "
+                "or is unsupported", type);
+        return NULL;
+    }
+}
+
+/**
+ * @internal
+ * @brief Get the host keys algorithms identifiers from the known_hosts files
+ *
+ * This expands the signatures types that can be generated from the keys types
+ * present in the known_hosts files
+ *
+ * @param[in]  session  The ssh session to use.
+ *
+ * @return A newly allocated cstring containing a list of signature algorithms
+ * that can be generated by the host using the keys listed in the known_hosts
+ * files, NULL on error.
+ */
+char *ssh_known_hosts_get_algorithms_names(ssh_session session)
+{
+    char methods_buffer[256 + 1] = {0};
+    struct ssh_list *entry_list = NULL;
+    struct ssh_iterator *it = NULL;
+    char *host_port = NULL;
+    size_t count;
+    bool needcomma = false;
+    char *names;
+
+    int rc;
+
+    if (session->opts.knownhosts == NULL ||
+        session->opts.global_knownhosts == NULL) {
+        if (ssh_options_apply(session) < 0) {
+            ssh_set_error(session,
+                          SSH_REQUEST_DENIED,
+                          "Can't find a known_hosts file");
+
+            return NULL;
+        }
+    }
+
+    host_port = ssh_session_get_host_port(session);
+    if (host_port == NULL) {
+        return NULL;
+    }
+
+    rc = ssh_known_hosts_read_entries(host_port,
+                                      session->opts.knownhosts,
+                                      &entry_list);
+    if (rc != 0) {
+        SAFE_FREE(host_port);
+        ssh_list_free(entry_list);
+        return NULL;
+    }
+
+    rc = ssh_known_hosts_read_entries(host_port,
+                                      session->opts.global_knownhosts,
+                                      &entry_list);
+    SAFE_FREE(host_port);
+    if (rc != 0) {
+        ssh_list_free(entry_list);
+        return NULL;
+    }
+
+    if (entry_list == NULL) {
+        return NULL;
+    }
+
+    count = ssh_list_count(entry_list);
+    if (count == 0) {
+        ssh_list_free(entry_list);
+        return NULL;
+    }
+
+    for (it = ssh_list_get_iterator(entry_list);
+         it != NULL;
+         it = ssh_list_get_iterator(entry_list))
+    {
+        struct ssh_knownhosts_entry *entry = NULL;
+        const char *algo = NULL;
+
+        entry = ssh_iterator_value(struct ssh_knownhosts_entry *, it);
+        algo = ssh_known_host_sigs_from_hostkey_type(entry->publickey->type);
+        if (algo == NULL) {
+            continue;
+        }
+
+        if (needcomma) {
+            strncat(methods_buffer,
+                    ",",
+                    sizeof(methods_buffer) - strlen(methods_buffer) - 1);
+        }
+
+        strncat(methods_buffer,
+                algo,
+                sizeof(methods_buffer) - strlen(methods_buffer) - 1);
+        needcomma = true;
+
+        ssh_knownhosts_entry_free(entry);
+        ssh_list_remove(entry_list, it);
+    }
+
+    ssh_list_free(entry_list);
+
+    names = ssh_remove_duplicates(methods_buffer);
+
+    return names;
+}
+
 /**
  * @brief Parse a line from a known_hosts entry into a structure
  *
@@ -638,14 +779,15 @@ enum ssh_known_hosts_e ssh_session_has_known_hosts_entry(ssh_session session)
     struct ssh_list *entry_list = NULL;
     struct ssh_iterator *it = NULL;
     char *host_port = NULL;
-    bool ok;
+    bool global_known_hosts_found = false;
+    bool known_hosts_found = false;
     int rc;
 
     if (session->opts.knownhosts == NULL) {
         if (ssh_options_apply(session) < 0) {
             ssh_set_error(session,
                           SSH_REQUEST_DENIED,
-                          "Can't find a known_hosts file");
+                          "Cannot find a known_hosts file");
 
             return SSH_KNOWN_HOSTS_NOT_FOUND;
         }
@@ -653,50 +795,67 @@ enum ssh_known_hosts_e ssh_session_has_known_hosts_entry(ssh_session session)
 
     if (session->opts.knownhosts == NULL &&
         session->opts.global_knownhosts == NULL) {
+            ssh_set_error(session,
+                          SSH_REQUEST_DENIED,
+                          "No path set for a known_hosts file");
+
             return SSH_KNOWN_HOSTS_NOT_FOUND;
     }
 
     if (session->opts.knownhosts != NULL) {
-        ok = ssh_file_readaccess_ok(session->opts.knownhosts);
-        if (!ok) {
-            return SSH_KNOWN_HOSTS_NOT_FOUND;
+        known_hosts_found = ssh_file_readaccess_ok(session->opts.knownhosts);
+        if (!known_hosts_found) {
+            SSH_LOG(SSH_LOG_WARN, "Cannot access file %s",
+                    session->opts.knownhosts);
         }
     }
 
     if (session->opts.global_knownhosts != NULL) {
-        ok = ssh_file_readaccess_ok(session->opts.global_knownhosts);
-        if (!ok) {
-            return SSH_KNOWN_HOSTS_NOT_FOUND;
+        global_known_hosts_found =
+                ssh_file_readaccess_ok(session->opts.global_knownhosts);
+        if (!global_known_hosts_found) {
+            SSH_LOG(SSH_LOG_WARN, "Cannot access file %s",
+                    session->opts.global_knownhosts);
         }
     }
 
+    if ((!known_hosts_found) && (!global_known_hosts_found)) {
+        ssh_set_error(session,
+                      SSH_REQUEST_DENIED,
+                      "Cannot find a known_hosts file");
+
+        return SSH_KNOWN_HOSTS_NOT_FOUND;
+    }
+
     host_port = ssh_session_get_host_port(session);
     if (host_port == NULL) {
         return SSH_KNOWN_HOSTS_ERROR;
     }
 
-    if (session->opts.knownhosts != NULL) {
+    if (known_hosts_found) {
         rc = ssh_known_hosts_read_entries(host_port,
                                           session->opts.knownhosts,
                                           &entry_list);
         if (rc != 0) {
             SAFE_FREE(host_port);
             ssh_list_free(entry_list);
-            return SSH_KNOWN_HOSTS_UNKNOWN;
+            return SSH_KNOWN_HOSTS_ERROR;
         }
     }
 
-    if (session->opts.global_knownhosts != NULL) {
+    if (global_known_hosts_found) {
         rc = ssh_known_hosts_read_entries(host_port,
                                           session->opts.global_knownhosts,
                                           &entry_list);
-        SAFE_FREE(host_port);
         if (rc != 0) {
+            SAFE_FREE(host_port);
             ssh_list_free(entry_list);
-            return SSH_KNOWN_HOSTS_UNKNOWN;
+            return SSH_KNOWN_HOSTS_ERROR;
         }
     }
 
+    SAFE_FREE(host_port);
+
     if (ssh_list_count(entry_list) == 0) {
         ssh_list_free(entry_list);
         return SSH_KNOWN_HOSTS_UNKNOWN;
@@ -820,34 +979,41 @@ int ssh_session_update_known_hosts(ssh_session session)
         }
     }
 
-    /* Check if directory exists and create it if not */
-    dir = ssh_dirname(session->opts.knownhosts);
-    if (dir == NULL) {
-        ssh_set_error(session, SSH_FATAL, "%s", strerror(errno));
-        return SSH_ERROR;
-    }
-
-    rc = ssh_file_readaccess_ok(dir);
-    if (rc == 0) {
-        rc = ssh_mkdir(dir, 0700);
-    } else {
-        rc = 0;
-    }
-
-    if (rc != 0) {
-        ssh_set_error(session, SSH_FATAL,
-                      "Cannot create %s directory.", dir);
-        SAFE_FREE(dir);
-        return SSH_ERROR;
-    }
-    SAFE_FREE(dir);
-
+    errno = 0;
     fp = fopen(session->opts.knownhosts, "a");
     if (fp == NULL) {
-        ssh_set_error(session, SSH_FATAL,
-                "Couldn't open known_hosts file %s for appending: %s",
-                session->opts.knownhosts, strerror(errno));
-        return SSH_ERROR;
+        if (errno == ENOENT) {
+            dir = ssh_dirname(session->opts.knownhosts);
+            if (dir == NULL) {
+                ssh_set_error(session, SSH_FATAL, "%s", strerror(errno));
+                return SSH_ERROR;
+            }
+
+            rc = ssh_mkdirs(dir, 0700);
+            if (rc < 0) {
+                ssh_set_error(session, SSH_FATAL,
+                              "Cannot create %s directory: %s",
+                              dir, strerror(errno));
+                SAFE_FREE(dir);
+                return SSH_ERROR;
+            }
+            SAFE_FREE(dir);
+
+            errno = 0;
+            fp = fopen(session->opts.knownhosts, "a");
+            if (fp == NULL) {
+                ssh_set_error(session, SSH_FATAL,
+                              "Couldn't open known_hosts file %s"
+                              " for appending: %s",
+                              session->opts.knownhosts, strerror(errno));
+                return SSH_ERROR;
+            }
+        } else {
+            ssh_set_error(session, SSH_FATAL,
+                          "Couldn't open known_hosts file %s for appending: %s",
+                          session->opts.knownhosts, strerror(errno));
+            return SSH_ERROR;
+        }
     }
 
     rc = ssh_session_export_known_hosts_entry(session, &entry);

src/libcrypto.c

@@ -686,8 +686,12 @@ static int aes_ctr_set_key(struct ssh_cipher_struct *cipher, void *key,
     return SSH_OK;
 }
 
-static void aes_ctr_encrypt(struct ssh_cipher_struct *cipher, void *in, void *out,
-    unsigned long len) {
+static void
+aes_ctr_encrypt(struct ssh_cipher_struct *cipher,
+                void *in,
+                void *out,
+                size_t len)
+{
   unsigned char tmp_buffer[AES_BLOCK_SIZE];
   unsigned int num=0;
   /* Some things are special with ctr128 :

src/libgcrypt.c

@@ -738,7 +738,7 @@ ssh_string ssh_sexp_extract_mpi(const gcry_sexp_t sexp,
     err = gcry_mpi_print(outformat, ssh_string_data(result), size, NULL, mpi);
     if (err != 0) {
         ssh_string_burn(result);
-        ssh_string_free(result);
+        SSH_STRING_FREE(result);
         result = NULL;
         goto fail;
     }

src/match.c

@@ -38,16 +38,21 @@
 #include "config.h"
 
 #include <ctype.h>
+#include <stdbool.h>
 #include <sys/types.h>
 
 #include "libssh/priv.h"
 
+#define MAX_MATCH_RECURSION 32
+
 /*
  * Returns true if the given string matches the pattern (which may contain ?
  * and * as wildcards), and zero if it does not match.
  */
-static int match_pattern(const char *s, const char *pattern) {
-  if (s == NULL || pattern == NULL) {
+static int match_pattern(const char *s, const char *pattern, size_t limit)
+{
+  bool had_asterisk = false;
+  if (s == NULL || pattern == NULL || limit <= 0) {
     return 0;
   }
 
@@ -57,23 +62,26 @@ static int match_pattern(const char *s, const char *pattern) {
         return (*s == '\0');
     }
 
-    if (*pattern == '*') {
+    while (*pattern == '*') {
       /* Skip the asterisk. */
+      had_asterisk = true;
       pattern++;
+    }
 
+    if (had_asterisk) {
       /* If at end of pattern, accept immediately. */
       if (!*pattern)
         return 1;
 
       /* If next character in pattern is known, optimize. */
-      if (*pattern != '?' && *pattern != '*') {
+      if (*pattern != '?') {
         /*
          * Look instances of the next character in
          * pattern, and try to match starting from
          * those.
          */
         for (; *s; s++)
-          if (*s == *pattern && match_pattern(s + 1, pattern + 1)) {
+          if (*s == *pattern && match_pattern(s + 1, pattern + 1, limit - 1)) {
             return 1;
           }
         /* Failed. */
@@ -84,7 +92,7 @@ static int match_pattern(const char *s, const char *pattern) {
        * match at each position.
        */
       for (; *s; s++) {
-        if (match_pattern(s, pattern)) {
+        if (match_pattern(s, pattern, limit - 1)) {
           return 1;
         }
       }
@@ -161,7 +169,7 @@ int match_pattern_list(const char *string, const char *pattern,
     sub[subi] = '\0';
 
     /* Try to match the subpattern against the string. */
-    if (match_pattern(string, sub)) {
+    if (match_pattern(string, sub, MAX_MATCH_RECURSION)) {
       if (negated) {
         return -1;        /* Negative */
       } else {

src/mbedcrypto_missing.c

@@ -45,7 +45,7 @@ void ssh_mbedcry_bn_free(bignum bn)
     SAFE_FREE(bn);
 }
 
-unsigned char *ssh_mbedcry_bn2num(bignum num, int radix)
+unsigned char *ssh_mbedcry_bn2num(const_bignum num, int radix)
 {
     char *buf = NULL;
     size_t olen;

src/messages.c

@@ -71,6 +71,9 @@ static ssh_message ssh_message_new(ssh_session session)
     }
     msg->session = session;
 
+    /* Set states explicitly */
+    msg->auth_request.signature_state = SSH_PUBLICKEY_STATE_NONE;
+
     return msg;
 }
 
@@ -696,7 +699,7 @@ static ssh_buffer ssh_msg_userauth_build_digest(ssh_session session,
     }
     rc = ssh_pki_export_pubkey_blob(msg->auth_request.pubkey, &str);
     if (rc < 0) {
-        ssh_buffer_free(buffer);
+        SSH_BUFFER_FREE(buffer);
         return NULL;
     }
 
@@ -712,10 +715,10 @@ static ssh_buffer ssh_msg_userauth_build_digest(ssh_session session,
                          ssh_string_get_char(algo), /* pubkey algorithm */
                          str); /* public key as a blob */
 
-    ssh_string_free(str);
+    SSH_STRING_FREE(str);
     if (rc != SSH_OK) {
         ssh_set_error_oom(session);
-        ssh_buffer_free(buffer);
+        SSH_BUFFER_FREE(buffer);
         return NULL;
     }
 
@@ -797,7 +800,7 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_request){
      * 3.1.  Initial Exchange
      * "The language tag is deprecated and SHOULD be the empty string."
      */
-    ssh_string_free(lang);
+    SSH_STRING_FREE(lang);
 
     submethods = ssh_buffer_get_ssh_string(packet);
     if (submethods == NULL) {
@@ -809,7 +812,7 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_request){
      *  server is that, unless the user may use multiple different
      *  submethods, the server ignores this field."
      */
-    ssh_string_free(submethods);
+    SSH_STRING_FREE(submethods);
 
     goto end;
   }
@@ -832,10 +835,10 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_request){
     }
 
     rc = ssh_pki_import_pubkey_blob(pubkey_blob, &msg->auth_request.pubkey);
-    ssh_string_free(pubkey_blob);
+    SSH_STRING_FREE(pubkey_blob);
     pubkey_blob = NULL;
     if (rc < 0) {
-        ssh_string_free(algo);
+        SSH_STRING_FREE(algo);
         algo = NULL;
         goto error;
     }
@@ -849,16 +852,16 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_request){
         if(sig_blob == NULL) {
             SSH_LOG(SSH_LOG_PACKET, "Invalid signature packet from peer");
             msg->auth_request.signature_state = SSH_PUBLICKEY_STATE_ERROR;
-            ssh_string_free(algo);
+            SSH_STRING_FREE(algo);
             algo = NULL;
             goto error;
         }
 
         digest = ssh_msg_userauth_build_digest(session, msg, service, algo);
-        ssh_string_free(algo);
+        SSH_STRING_FREE(algo);
         algo = NULL;
         if (digest == NULL) {
-            ssh_string_free(sig_blob);
+            SSH_STRING_FREE(sig_blob);
             SSH_LOG(SSH_LOG_PACKET, "Failed to get digest");
             msg->auth_request.signature_state = SSH_PUBLICKEY_STATE_WRONG;
             goto error;
@@ -891,8 +894,8 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_request){
                                               ssh_buffer_get_len(digest));
             }
         }
-        ssh_string_free(sig_blob);
-        ssh_buffer_free(digest);
+        SSH_STRING_FREE(sig_blob);
+        SSH_BUFFER_FREE(digest);
         ssh_signature_free(sig);
         if (rc < 0) {
             SSH_LOG(
@@ -906,7 +909,7 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_request){
 
         msg->auth_request.signature_state = SSH_PUBLICKEY_STATE_VALID;
     }
-    ssh_string_free(algo);
+    SSH_STRING_FREE(algo);
     goto end;
   }
 #ifdef WITH_GSSAPI
@@ -1094,7 +1097,7 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_info_response){
       goto error;
     }
     session->kbdint->answers[i] = ssh_string_to_char(tmp);
-    ssh_string_free(tmp);
+    SSH_STRING_FREE(tmp);
     if (session->kbdint->answers[i] == NULL) {
       ssh_set_error_oom(session);
       session->kbdint->nanswers = i;
@@ -1491,12 +1494,18 @@ SSH_PACKET_CALLBACK(ssh_packet_global_request){
     msg->type = SSH_REQUEST_GLOBAL;
 
     if (strcmp(request, "tcpip-forward") == 0) {
+
+        /* According to RFC4254, the client SHOULD reject this message */
+        if (session->client) {
+            goto reply_with_failure;
+        }
+
         r = ssh_buffer_unpack(packet, "sd",
                 &msg->global_request.bind_address,
                 &msg->global_request.bind_port
                 );
         if (r != SSH_OK){
-            goto error;
+            goto reply_with_failure;
         }
         msg->global_request.type = SSH_GLOBAL_REQUEST_TCPIP_FORWARD;
         msg->global_request.want_reply = want_reply;
@@ -1516,11 +1525,17 @@ SSH_PACKET_CALLBACK(ssh_packet_global_request){
             return rc;
         }
     } else if (strcmp(request, "cancel-tcpip-forward") == 0) {
+
+        /* According to RFC4254, the client SHOULD reject this message */
+        if (session->client) {
+            goto reply_with_failure;
+        }
+
         r = ssh_buffer_unpack(packet, "sd",
                 &msg->global_request.bind_address,
                 &msg->global_request.bind_port);
         if (r != SSH_OK){
-            goto error;
+            goto reply_with_failure;
         }
         msg->global_request.type = SSH_GLOBAL_REQUEST_CANCEL_TCPIP_FORWARD;
         msg->global_request.want_reply = want_reply;
@@ -1546,18 +1561,41 @@ SSH_PACKET_CALLBACK(ssh_packet_global_request){
             ssh_message_global_request_reply_success(msg, 0);
         }
     } else {
-        SSH_LOG(SSH_LOG_PROTOCOL, "UNKNOWN SSH_MSG_GLOBAL_REQUEST %s %d", request, want_reply);
-        rc = SSH_PACKET_NOT_USED;
+        SSH_LOG(SSH_LOG_PROTOCOL, "UNKNOWN SSH_MSG_GLOBAL_REQUEST %s, "
+                "want_reply = %d", request, want_reply);
+        goto reply_with_failure;
     }
 
     SAFE_FREE(msg);
     SAFE_FREE(request);
     return rc;
+
+reply_with_failure:
+    /* Only report the failure if requested */
+    if (want_reply) {
+        r = ssh_buffer_add_u8(session->out_buffer,
+                SSH2_MSG_REQUEST_FAILURE);
+        if (r < 0) {
+            ssh_set_error_oom(session);
+            goto error;
+        }
+
+        r = ssh_packet_send(session);
+        if (r != SSH_OK) {
+            goto error;
+        }
+    } else {
+        SSH_LOG(SSH_LOG_PACKET,
+                "The requester doesn't want to know the request failed!");
+    }
+
+    /* Consume the message to avoid sending UNIMPLEMENTED later */
+    rc = SSH_PACKET_USED;
 error:
     SAFE_FREE(msg);
     SAFE_FREE(request);
     SSH_LOG(SSH_LOG_WARNING, "Invalid SSH_MSG_GLOBAL_REQUEST packet");
-    return SSH_PACKET_NOT_USED;
+    return rc;
 }
 
 #endif /* WITH_SERVER */

src/misc.c

@@ -130,6 +130,31 @@ int ssh_file_readaccess_ok(const char *file) {
   return 1;
 }
 
+/**
+ * @brief Check if the given path is an existing directory and that is
+ * accessible for writing.
+ *
+ * @param[in] path Path to the directory to be checked
+ *
+ * @return Return 1 if the directory exists and is accessible; 0 otherwise
+ * */
+int ssh_dir_writeable(const char *path)
+{
+    struct _stat buffer;
+    int rc;
+
+    rc = _stat(path, &buffer);
+    if (rc < 0) {
+        return 0;
+    }
+
+    if ((buffer.st_mode & _S_IFDIR) && (buffer.st_mode & _S_IWRITE)) {
+        return 1;
+    }
+
+    return 0;
+}
+
 #define SSH_USEC_IN_SEC         1000000LL
 #define SSH_SECONDS_SINCE_1601  11644473600LL
 
@@ -247,6 +272,31 @@ int ssh_file_readaccess_ok(const char *file)
     return 1;
 }
 
+/**
+ * @brief Check if the given path is an existing directory and that is
+ * accessible for writing.
+ *
+ * @param[in] path Path to the directory to be checked
+ *
+ * @return Return 1 if the directory exists and is accessible; 0 otherwise
+ * */
+int ssh_dir_writeable(const char *path)
+{
+    struct stat buffer;
+    int rc;
+
+    rc = stat(path, &buffer);
+    if (rc < 0) {
+        return 0;
+    }
+
+    if (S_ISDIR(buffer.st_mode) && (buffer.st_mode & S_IWRITE)) {
+        return 1;
+    }
+
+    return 0;
+}
+
 char *ssh_get_local_username(void)
 {
     struct passwd pwd;
@@ -389,6 +439,193 @@ void ssh_print_hexa(const char *descr, const unsigned char *what, size_t len) {
     free(hexa);
 }
 
+/**
+ * @brief Log the content of a buffer in hexadecimal format, similar to the
+ * output of 'hexdump -C' command.
+ *
+ * The first logged line is the given description followed by the length.
+ * Then the content of the buffer is logged 16 bytes per line in the following
+ * format:
+ *
+ * (offset) (first 8 bytes) (last 8 bytes) (the 16 bytes as ASCII char values)
+ *
+ * The output for a 16 bytes array containing values from 0x00 to 0x0f would be:
+ *
+ * "Example (16 bytes):"
+ * "  00000000  00 01 02 03 04 05 06 07  08 09 0a 0b 0c 0d 0e 0f  ................"
+ *
+ * The value for each byte as corresponding ASCII character is printed at the
+ * end if the value is printable. Otherwise it is replace with '.'.
+ *
+ * @param[in] descr A description for the content to be logged
+ * @param[in] what  The buffer to be logged
+ * @param[in] len   The length of the buffer given in what
+ *
+ * @note If a too long description is provided (which would result in a first
+ * line longer than 80 bytes), the function will fail.
+ */
+void ssh_log_hexdump(const char *descr, const unsigned char *what, size_t len)
+{
+    size_t i;
+    char ascii[17];
+    const unsigned char *pc = NULL;
+    size_t count = 0;
+    ssize_t printed = 0;
+
+    /* The required buffer size is calculated from:
+     *
+     *  2 bytes for spaces at the beginning
+     *  8 bytes for the offset
+     *  2 bytes for spaces
+     * 24 bytes to print the first 8 bytes + spaces
+     *  1 byte for an extra space
+     * 24 bytes to print next 8 bytes + spaces
+     *  2 bytes for extra spaces
+     * 16 bytes for the content as ASCII characters at the end
+     *  1 byte for the ending '\0'
+     *
+     * Resulting in 80 bytes.
+     *
+     * Except for the first line (description + size), all lines have fixed
+     * length. If a too long description is used, the function will fail.
+     * */
+    char buffer[80];
+
+    /* Print description */
+    if (descr != NULL) {
+        printed = snprintf(buffer, sizeof(buffer), "%s ", descr);
+        if (printed < 0) {
+            goto error;
+        }
+        count += printed;
+    } else {
+        printed = snprintf(buffer, sizeof(buffer), "(NULL description) ");
+        if (printed < 0) {
+            goto error;
+        }
+        count += printed;
+    }
+
+    if (len == 0) {
+        printed = snprintf(buffer + count, sizeof(buffer) - count,
+                           "(zero length):");
+        if (printed < 0) {
+            goto error;
+        }
+        SSH_LOG(SSH_LOG_DEBUG, "%s", buffer);
+        return;
+    } else {
+        printed = snprintf(buffer + count, sizeof(buffer) - count,
+                           "(%zu bytes):", len);
+        if (printed < 0) {
+            goto error;
+        }
+        count += printed;
+    }
+
+    if (what == NULL) {
+        printed = snprintf(buffer + count, sizeof(buffer) - count,
+                           "(NULL)");
+        if (printed < 0) {
+            goto error;
+        }
+        SSH_LOG(SSH_LOG_DEBUG, "%s", buffer);
+        return;
+    }
+
+    SSH_LOG(SSH_LOG_DEBUG, "%s", buffer);
+
+    /* Reset state */
+    count = 0;
+    pc = what;
+
+    for (i = 0; i < len; i++) {
+        /* Add one space after printing 8 bytes */
+        if ((i % 8) == 0) {
+            if (i != 0) {
+                printed = snprintf(buffer + count, sizeof(buffer) - count, " ");
+                if (printed < 0) {
+                    goto error;
+                }
+                count += printed;
+            }
+        }
+
+        /* Log previous line and reset state for new line */
+        if ((i % 16) == 0) {
+            if (i != 0) {
+                printed = snprintf(buffer + count, sizeof(buffer) - count,
+                                   "  %s", ascii);
+                if (printed < 0) {
+                    goto error;
+                }
+                SSH_LOG(SSH_LOG_DEBUG, "%s", buffer);
+                count = 0;
+            }
+
+            /* Start a new line with the offset */
+            printed = snprintf(buffer, sizeof(buffer),
+                               "  %08zx ", i);
+            if (printed < 0) {
+                goto error;
+            }
+            count += printed;
+        }
+
+        /* Print the current byte hexadecimal representation */
+        printed = snprintf(buffer + count, sizeof(buffer) - count,
+                           " %02x", pc[i]);
+        if (printed < 0) {
+            goto error;
+        }
+        count += printed;
+
+        /* If printable, store the ASCII character */
+        if (isprint(pc[i])) {
+            ascii[i % 16] = pc[i];
+        } else {
+            ascii[i % 16] = '.';
+        }
+        ascii[(i % 16) + 1] = '\0';
+    }
+
+    /* Add padding if not exactly 16 characters */
+    while ((i % 16) != 0) {
+        /* Add one space after printing 8 bytes */
+        if ((i % 8) == 0) {
+            if (i != 0) {
+                printed = snprintf(buffer + count, sizeof(buffer) - count, " ");
+                if (printed < 0) {
+                    goto error;
+                }
+                count += printed;
+            }
+        }
+
+        printed = snprintf(buffer + count, sizeof(buffer) - count, "   ");
+        if (printed < 0) {
+            goto error;
+        }
+        count += printed;
+        i++;
+    }
+
+    /* Print the last printable part */
+    printed = snprintf(buffer + count, sizeof(buffer) - count,
+                       "   %s", ascii);
+    if (printed < 0) {
+        goto error;
+    }
+
+    SSH_LOG(SSH_LOG_DEBUG, "%s", buffer);
+
+    return;
+
+error:
+    SSH_LOG(SSH_LOG_WARN, "Could not print to buffer");
+    return;
+}
+
 /**
  * @brief Check if libssh is the required version or get the version
  * string.
@@ -713,16 +950,81 @@ char *ssh_basename (const char *path) {
  *
  * @return              0 on success, < 0 on error with errno set.
  */
-int ssh_mkdir(const char *pathname, mode_t mode) {
-  int r;
-
+int ssh_mkdir(const char *pathname, mode_t mode)
+{
+    int r;
 #ifdef _WIN32
-  r = _mkdir(pathname);
+    r = _mkdir(pathname);
 #else
-  r = mkdir(pathname, mode);
+    r = mkdir(pathname, mode);
 #endif
 
-  return r;
+    return r;
+}
+
+/**
+ * @brief Attempts to create a directory with the given pathname. The missing
+ * directories in the given pathname are created recursively.
+ *
+ * @param[in]  pathname The path name to create the directory.
+ *
+ * @param[in]  mode     The permissions to use.
+ *
+ * @return              0 on success, < 0 on error with errno set.
+ *
+ * @note mode is ignored on Windows systems.
+ */
+int ssh_mkdirs(const char *pathname, mode_t mode)
+{
+    int rc = 0;
+    char *parent = NULL;
+
+    if (pathname == NULL ||
+        pathname[0] == '\0' ||
+        !strcmp(pathname, "/") ||
+        !strcmp(pathname, "."))
+    {
+        errno = EINVAL;
+        return -1;
+    }
+
+    errno = 0;
+
+#ifdef _WIN32
+    rc = _mkdir(pathname);
+#else
+    rc = mkdir(pathname, mode);
+#endif
+
+    if (rc < 0) {
+        /* If a directory was missing, try to create the parent */
+        if (errno == ENOENT) {
+            parent = ssh_dirname(pathname);
+            if (parent == NULL) {
+                errno = ENOMEM;
+                return -1;
+            }
+
+            rc = ssh_mkdirs(parent, mode);
+            if (rc < 0) {
+                /* We could not create the parent */
+                SAFE_FREE(parent);
+                return -1;
+            }
+
+            SAFE_FREE(parent);
+
+            /* Try again */
+            errno = 0;
+#ifdef _WIN32
+            rc = _mkdir(pathname);
+#else
+            rc = mkdir(pathname, mode);
+#endif
+        }
+    }
+
+    return rc;
 }
 
 /**
@@ -825,6 +1127,7 @@ char *ssh_path_expand_escape(ssh_session session, const char *s) {
 
     for (i = 0; *p != '\0'; p++) {
         if (*p != '%') {
+        escape:
             buf[i] = *p;
             i++;
             if (i >= MAX_BUF_SIZE) {
@@ -841,6 +1144,8 @@ char *ssh_path_expand_escape(ssh_session session, const char *s) {
         }
 
         switch (*p) {
+            case '%':
+                goto escape;
             case 'd':
                 x = strdup(session->opts.sshdir);
                 break;
@@ -1203,4 +1508,231 @@ uint64_inc(unsigned char *counter)
     }
 }
 
+/**
+ * @internal
+ *
+ * @brief Quote file name to be used on shell.
+ *
+ * Try to put the given file name between single quotes. There are special
+ * cases:
+ *
+ * - When the '\'' char is found in the file name, it is double quoted
+ *   - example:
+ *     input: a'b
+ *     output: 'a'"'"'b'
+ * - When the '!' char is found in the file name, it is replaced by an unquoted
+ *   verbatim char "\!"
+ *   - example:
+ *     input: a!b
+ *     output 'a'\!'b'
+ *
+ * @param[in]   file_name  File name string to be quoted before used on shell
+ * @param[out]  buf       Buffer to receive the final quoted file name.  Must
+ *                        have room for the final quoted string.  The maximum
+ *                        output length would be (3 * strlen(file_name) + 1)
+ *                        since in the worst case each character would be
+ *                        replaced by 3 characters, plus the terminating '\0'.
+ * @param[in]   buf_len   The size of the provided output buffer
+ *
+ * @returns SSH_ERROR on error; length of the resulting string not counting the
+ * string terminator '\0'
+ * */
+int ssh_quote_file_name(const char *file_name, char *buf, size_t buf_len)
+{
+    const char *src = NULL;
+    char *dst = NULL;
+    size_t required_buf_len;
+
+    enum ssh_quote_state_e state = NO_QUOTE;
+
+    if (file_name == NULL || buf == NULL || buf_len == 0) {
+        SSH_LOG(SSH_LOG_WARNING, "Invalid parameter");
+        return SSH_ERROR;
+    }
+
+    /* Only allow file names smaller than 32kb. */
+    if (strlen(file_name) > 32 * 1024) {
+        SSH_LOG(SSH_LOG_WARNING, "File name too long");
+        return SSH_ERROR;
+    }
+
+    /* Paranoia check */
+    required_buf_len = (size_t)3 * strlen(file_name) + 1;
+    if (required_buf_len > buf_len) {
+        SSH_LOG(SSH_LOG_WARNING, "Buffer too small");
+        return SSH_ERROR;
+    }
+
+    src = file_name;
+    dst = buf;
+
+    while ((*src != '\0')) {
+        switch (*src) {
+
+        /* The '\'' char is double quoted */
+
+        case '\'':
+            switch (state) {
+            case NO_QUOTE:
+                /* Start a new double quoted string. The '\'' char will be
+                 * copied to the beginning of it at the end of the loop. */
+                *dst++ = '"';
+                break;
+            case SINGLE_QUOTE:
+                /* Close the current single quoted string and start a new double
+                 * quoted string. The '\'' char will be copied to the beginning
+                 * of it at the end of the loop. */
+                *dst++ = '\'';
+                *dst++ = '"';
+                break;
+            case DOUBLE_QUOTE:
+                /* If already in the double quoted string, keep copying the
+                 * sequence of chars. */
+                break;
+            default:
+                /* Should never be reached */
+                goto error;
+            }
+
+            /* When the '\'' char is found, the resulting state will be
+             * DOUBLE_QUOTE in any case*/
+            state = DOUBLE_QUOTE;
+            break;
+
+        /* The '!' char is replaced by unquoted "\!" */
+
+        case '!':
+            switch (state) {
+            case NO_QUOTE:
+                /* The '!' char is interpreted in some shells (e.g. CSH) even
+                 * when is quoted with single quotes.  Replace it with unquoted
+                 * "\!" which is correctly interpreted as the '!' character. */
+                *dst++ = '\\';
+                break;
+            case SINGLE_QUOTE:
+                /* Close the current quoted string and replace '!' for unquoted
+                 * "\!" */
+                *dst++ = '\'';
+                *dst++ = '\\';
+                break;
+            case DOUBLE_QUOTE:
+                /* Close current quoted string and replace  "!" for unquoted
+                 * "\!" */
+                *dst++ = '"';
+                *dst++ = '\\';
+                break;
+            default:
+                /* Should never be reached */
+                goto error;
+            }
+
+            /* When the '!' char is found, the resulting state will be NO_QUOTE
+             * in any case*/
+            state = NO_QUOTE;
+            break;
+
+        /* Ordinary chars are single quoted */
+
+        default:
+            switch (state) {
+            case NO_QUOTE:
+                /* Start a new single quoted string */
+                *dst++ = '\'';
+                break;
+            case SINGLE_QUOTE:
+                /* If already in the single quoted string, keep copying the
+                 * sequence of chars. */
+                break;
+            case DOUBLE_QUOTE:
+                /* Close current double quoted string and start a new single
+                 * quoted string. */
+                *dst++ = '"';
+                *dst++ = '\'';
+                break;
+            default:
+                /* Should never be reached */
+                goto error;
+            }
+
+            /* When an ordinary char is found, the resulting state will be
+             * SINGLE_QUOTE in any case*/
+            state = SINGLE_QUOTE;
+            break;
+        }
+
+        /* Copy the current char to output */
+        *dst++ = *src++;
+    }
+
+    /* Close the quoted string when necessary */
+
+    switch (state) {
+    case NO_QUOTE:
+        /* No open string */
+        break;
+    case SINGLE_QUOTE:
+        /* Close current single quoted string */
+        *dst++ = '\'';
+        break;
+    case DOUBLE_QUOTE:
+        /* Close current double quoted string */
+        *dst++ = '"';
+        break;
+    default:
+        /* Should never be reached */
+        goto error;
+    }
+
+    /* Put the string terminator */
+    *dst = '\0';
+
+    return dst - buf;
+
+error:
+    return SSH_ERROR;
+}
+
+/**
+ * @internal
+ *
+ * @brief Given a string, encode existing newlines as the string "\\n"
+ *
+ * @param[in]  string   Input string
+ * @param[out] buf      Output buffer. This buffer must be at least (2 *
+ *                      strlen(string)) + 1 long.  In the worst case,
+ *                      each character can be encoded as 2 characters plus the
+ *                      terminating '\0'.
+ * @param[in]  buf_len  Size of the provided output buffer
+ *
+ * @returns SSH_ERROR on error; length of the resulting string not counting the
+ * terminating '\0' otherwise
+ */
+int ssh_newline_vis(const char *string, char *buf, size_t buf_len)
+{
+    const char *in = NULL;
+    char *out = NULL;
+
+    if (string == NULL || buf == NULL || buf_len == 0) {
+        return SSH_ERROR;
+    }
+
+    if ((2 * strlen(string) + 1) > buf_len) {
+        SSH_LOG(SSH_LOG_WARNING, "Buffer too small");
+        return SSH_ERROR;
+    }
+
+    out = buf;
+    for (in = string; *in != '\0'; in++) {
+        if (*in == '\n') {
+            *out++ = '\\';
+            *out++ = 'n';
+        } else {
+            *out++ = *in;
+        }
+    }
+    *out = '\0';
+
+    return out - buf;
+}
+
 /** @} */

src/options.c

@@ -154,7 +154,7 @@ int ssh_options_copy(ssh_session src, ssh_session *dest)
         }
     }
 
-    for (i = 0; i < 10; i++) {
+    for (i = 0; i < SSH_KEX_METHODS; i++) {
         if (src->opts.wanted_methods[i] != NULL) {
             new->opts.wanted_methods[i] = strdup(src->opts.wanted_methods[i]);
             if (new->opts.wanted_methods[i] == NULL) {
@@ -531,7 +531,7 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
                     return -1;
                 }
 
-                session->opts.port = *x & 0xffff;
+                session->opts.port = *x & 0xffffU;
             }
             break;
         case SSH_OPTIONS_PORT_STR:
@@ -555,7 +555,7 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
                     return -1;
                 }
 
-                session->opts.port = i & 0xffff;
+                session->opts.port = i & 0xffffU;
             }
             break;
         case SSH_OPTIONS_FD:
@@ -693,7 +693,7 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
                     return -1;
                 }
 
-                session->opts.timeout = *x & 0xffffffff;
+                session->opts.timeout = *x & 0xffffffffU;
             }
             break;
         case SSH_OPTIONS_TIMEOUT_USEC:
@@ -707,7 +707,7 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
                     return -1;
                 }
 
-                session->opts.timeout_usec = *x & 0xffffffff;
+                session->opts.timeout_usec = *x & 0xffffffffU;
             }
             break;
         case SSH_OPTIONS_SSH1:
@@ -725,8 +725,8 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
                     return -1;
                 }
 
-                session->common.log_verbosity = *x & 0xffff;
-                ssh_set_log_level(*x & 0xffff);
+                session->common.log_verbosity = *x & 0xffffU;
+                ssh_set_log_level(*x & 0xffffU);
             }
             break;
         case SSH_OPTIONS_LOG_VERBOSITY_STR:
@@ -751,8 +751,8 @@ int ssh_options_set(ssh_session session, enum ssh_options_e type,
                     return -1;
                 }
 
-                session->common.log_verbosity = i & 0xffff;
-                ssh_set_log_level(i & 0xffff);
+                session->common.log_verbosity = i & 0xffffU;
+                ssh_set_log_level(i & 0xffffU);
             }
             break;
         case SSH_OPTIONS_CIPHERS_C_S:
@@ -1472,6 +1472,13 @@ int ssh_options_apply(ssh_session session) {
          it != NULL;
          it = it->next) {
         char *id = (char *) it->data;
+        if (strncmp(id, "pkcs11:", 6) == 0) {
+            /* PKCS#11 URIs are using percent-encoding so we can not mix
+             * it with ssh expansion of ssh escape characters.
+             * Skip these identities now, before we will have PKCS#11 support
+             */
+             continue;
+        }
         tmp = ssh_path_expand_escape(session, id);
         if (tmp == NULL) {
             return -1;
@@ -1798,12 +1805,12 @@ int ssh_bind_options_set(ssh_bind sshbind, enum ssh_bind_options_e type,
         return -1;
       } else {
         int *x = (int *) value;
-        sshbind->bindport = *x & 0xffff;
+        sshbind->bindport = *x & 0xffffU;
       }
       break;
     case SSH_BIND_OPTIONS_BINDPORT_STR:
       if (value == NULL) {
-        sshbind->bindport = 22 & 0xffff;
+        sshbind->bindport = 22 & 0xffffU;
       } else {
         q = strdup(value);
         if (q == NULL) {
@@ -1816,7 +1823,7 @@ int ssh_bind_options_set(ssh_bind sshbind, enum ssh_bind_options_e type,
         }
         SAFE_FREE(q);
 
-        sshbind->bindport = i & 0xffff;
+        sshbind->bindport = i & 0xffffU;
       }
       break;
     case SSH_BIND_OPTIONS_LOG_VERBOSITY:
@@ -1825,7 +1832,7 @@ int ssh_bind_options_set(ssh_bind sshbind, enum ssh_bind_options_e type,
         return -1;
       } else {
         int *x = (int *) value;
-        ssh_set_log_level(*x & 0xffff);
+        ssh_set_log_level(*x & 0xffffU);
       }
       break;
     case SSH_BIND_OPTIONS_LOG_VERBOSITY_STR:
@@ -1843,7 +1850,7 @@ int ssh_bind_options_set(ssh_bind sshbind, enum ssh_bind_options_e type,
         }
         SAFE_FREE(q);
 
-        ssh_set_log_level(i & 0xffff);
+        ssh_set_log_level(i & 0xffffU);
       }
       break;
     case SSH_BIND_OPTIONS_DSAKEY:

src/packet.c

@@ -939,18 +939,38 @@ struct ssh_crypto_struct *
 ssh_packet_get_current_crypto(ssh_session session,
                               enum ssh_crypto_direction_e direction)
 {
+    struct ssh_crypto_struct *crypto = NULL;
+
     if (session == NULL) {
         return NULL;
     }
 
     if (session->current_crypto != NULL &&
         session->current_crypto->used & direction) {
-        return session->current_crypto;
+        crypto = session->current_crypto;
+    } else if (session->next_crypto != NULL &&
+               session->next_crypto->used & direction) {
+        crypto = session->next_crypto;
+    } else {
+        return NULL;
     }
 
-    if (session->next_crypto != NULL &&
-        session->next_crypto->used & direction) {
-        return session->next_crypto;
+    switch (direction) {
+    case SSH_DIRECTION_IN:
+        if (crypto->in_cipher != NULL) {
+            return crypto;
+        }
+        break;
+    case SSH_DIRECTION_OUT:
+        if (crypto->out_cipher != NULL) {
+            return crypto;
+        }
+        break;
+    case SSH_DIRECTION_BOTH:
+        if (crypto->in_cipher != NULL &&
+            crypto->out_cipher != NULL) {
+            return crypto;
+        }
     }
 
     return NULL;
@@ -1039,8 +1059,8 @@ static bool ssh_packet_need_rekey(ssh_session session,
 int ssh_packet_socket_callback(const void *data, size_t receivedlen, void *user)
 {
     ssh_session session = (ssh_session)user;
-    unsigned int blocksize = 8;
-    unsigned int lenfield_blocksize = 8;
+    uint32_t blocksize = 8;
+    uint32_t lenfield_blocksize = 8;
     size_t current_macsize = 0;
     uint8_t *ptr = NULL;
     int to_be_read;
@@ -1055,7 +1075,7 @@ int ssh_packet_socket_callback(const void *data, size_t receivedlen, void *user)
     enum ssh_packet_filter_result_e filter_result;
     struct ssh_crypto_struct *crypto = NULL;
     bool etm = false;
-    int etm_packet_offset = 0;
+    uint32_t etm_packet_offset = 0;
     bool ok;
 
     crypto = ssh_packet_get_current_crypto(session, SSH_DIRECTION_IN);
@@ -1438,37 +1458,54 @@ void ssh_packet_set_default_callbacks(ssh_session session){
  * @brief dispatch the call of packet handlers callbacks for a received packet
  * @param type type of packet
  */
-void ssh_packet_process(ssh_session session, uint8_t type){
-	struct ssh_iterator *i;
-	int r=SSH_PACKET_NOT_USED;
-	ssh_packet_callbacks cb;
+void ssh_packet_process(ssh_session session, uint8_t type)
+{
+    struct ssh_iterator *i = NULL;
+    int rc = SSH_PACKET_NOT_USED;
+    ssh_packet_callbacks cb;
 
-	SSH_LOG(SSH_LOG_PACKET, "Dispatching handler for packet type %d",type);
-	if(session->packet_callbacks == NULL){
-		SSH_LOG(SSH_LOG_RARE,"Packet callback is not initialized !");
+    SSH_LOG(SSH_LOG_PACKET, "Dispatching handler for packet type %d", type);
+    if (session->packet_callbacks == NULL) {
+        SSH_LOG(SSH_LOG_RARE, "Packet callback is not initialized !");
+        return;
+    }
 
-		return;
-	}
-	i=ssh_list_get_iterator(session->packet_callbacks);
-	while(i != NULL){
-		cb=ssh_iterator_value(ssh_packet_callbacks,i);
-		i=i->next;
-		if(!cb)
-			continue;
-		if(cb->start > type)
-			continue;
-		if(cb->start + cb->n_callbacks <= type)
-			continue;
-		if(cb->callbacks[type - cb->start]==NULL)
-			continue;
-		r=cb->callbacks[type - cb->start](session,type,session->in_buffer,cb->user);
-		if(r==SSH_PACKET_USED)
-			break;
-	}
-	if(r==SSH_PACKET_NOT_USED){
-		SSH_LOG(SSH_LOG_RARE,"Couldn't do anything with packet type %d",type);
-		ssh_packet_send_unimplemented(session, session->recv_seq-1);
-	}
+    i = ssh_list_get_iterator(session->packet_callbacks);
+    while (i != NULL) {
+        cb = ssh_iterator_value(ssh_packet_callbacks, i);
+        i = i->next;
+
+        if (!cb) {
+            continue;
+        }
+
+        if (cb->start > type) {
+            continue;
+        }
+
+        if (cb->start + cb->n_callbacks <= type) {
+            continue;
+        }
+
+        if (cb->callbacks[type - cb->start] == NULL) {
+            continue;
+        }
+
+        rc = cb->callbacks[type - cb->start](session, type, session->in_buffer,
+                                             cb->user);
+        if (rc == SSH_PACKET_USED) {
+            break;
+        }
+    }
+
+    if (rc == SSH_PACKET_NOT_USED) {
+        SSH_LOG(SSH_LOG_RARE, "Couldn't do anything with packet type %d", type);
+        rc = ssh_packet_send_unimplemented(session, session->recv_seq - 1);
+        if (rc != SSH_OK) {
+            SSH_LOG(SSH_LOG_RARE, "Failed to send unimplemented: %s",
+                    ssh_get_error(session));
+        }
+    }
 }
 
 /** @internal
@@ -1789,7 +1826,7 @@ int ssh_packet_send(ssh_session session)
                 SSH_LOG(SSH_LOG_PACKET, "Queued packet triggered rekey");
                 return ssh_send_rekex(session);
             }
-            ssh_buffer_free(session->out_buffer);
+            SSH_BUFFER_FREE(session->out_buffer);
             session->out_buffer = ssh_list_pop_head(struct ssh_buffer_struct *,
                                                     session->out_queue);
             payload = (uint8_t *)ssh_buffer_get(session->out_buffer);
@@ -1847,6 +1884,10 @@ ssh_packet_set_newkeys(ssh_session session,
             direction & SSH_DIRECTION_IN ? " IN " : "",
             direction & SSH_DIRECTION_OUT ? " OUT " : "");
 
+    if (session->next_crypto == NULL) {
+        return SSH_ERROR;
+    }
+
     session->next_crypto->used |= direction;
     if (session->current_crypto != NULL) {
         if (session->current_crypto->used & direction) {
@@ -1912,6 +1953,11 @@ ssh_packet_set_newkeys(ssh_session session,
         return SSH_ERROR;
     }
 
+    if (session->next_crypto->in_cipher == NULL ||
+        session->next_crypto->out_cipher == NULL) {
+        return SSH_ERROR;
+    }
+
     /* Initialize rekeying states */
     ssh_init_rekey_state(session,
                          session->next_crypto->out_cipher);
@@ -1929,6 +1975,8 @@ ssh_packet_set_newkeys(ssh_session session,
         session->next_crypto->decryptkey,
         session->next_crypto->decryptIV);
     if (rc < 0) {
+        /* On error, make sure it is not used */
+        session->next_crypto->used = 0;
         return SSH_ERROR;
     }
 
@@ -1937,6 +1985,8 @@ ssh_packet_set_newkeys(ssh_session session,
         session->next_crypto->encryptkey,
         session->next_crypto->encryptIV);
     if (rc < 0) {
+        /* On error, make sure it is not used */
+        session->next_crypto->used = 0;
         return SSH_ERROR;
     }
 

src/packet_cb.c

@@ -61,7 +61,7 @@ SSH_PACKET_CALLBACK(ssh_packet_disconnect_callback){
   error_s = ssh_buffer_get_ssh_string(packet);
   if (error_s != NULL) {
     error = ssh_string_to_char(error_s);
-    ssh_string_free(error_s);
+    SSH_STRING_FREE(error_s);
   }
   SSH_LOG(SSH_LOG_PACKET, "Received SSH_MSG_DISCONNECT %d:%s",
                           code, error != NULL ? error : "no error");
@@ -153,9 +153,8 @@ SSH_PACKET_CALLBACK(ssh_packet_newkeys){
                                   session->next_crypto->secret_hash,
                                   session->next_crypto->digest_len);
     ssh_string_burn(sig_blob);
-    ssh_string_free(sig_blob);
+    SSH_STRING_FREE(sig_blob);
     ssh_signature_free(sig);
-    sig_blob = NULL;
     if (rc == SSH_ERROR) {
       goto error;
     }

src/packet_crypt.c

@@ -103,6 +103,9 @@ int ssh_packet_decrypt(ssh_session session,
     }
 
     crypto = ssh_packet_get_current_crypto(session, SSH_DIRECTION_IN);
+    if (crypto == NULL) {
+        return SSH_ERROR;
+    }
     cipher = crypto->in_cipher;
 
     if (encrypted_size % cipher->blocksize != 0) {
@@ -196,11 +199,11 @@ unsigned char *ssh_packet_encrypt(ssh_session session, void *data, uint32_t len)
           hmac_final(ctx, crypto->hmacbuf, &finallen);
       }
 #ifdef DEBUG_CRYPTO
-      ssh_print_hexa("mac: ",data,hmac_digest_len(type));
+      ssh_log_hexdump("mac: ", data, len);
       if (finallen != hmac_digest_len(type)) {
-        printf("Final len is %d\n",finallen);
+          printf("Final len is %d\n", finallen);
       }
-      ssh_print_hexa("Packet hmac", crypto->hmacbuf, hmac_digest_len(type));
+      ssh_log_hexdump("Packet hmac", crypto->hmacbuf, hmac_digest_len(type));
 #endif
   }
   explicit_bzero(out, len);
@@ -252,6 +255,10 @@ int ssh_packet_hmac_verify(ssh_session session,
   }
 
   crypto = ssh_packet_get_current_crypto(session, SSH_DIRECTION_IN);
+  if (crypto == NULL) {
+      return SSH_ERROR;
+  }
+
   ctx = hmac_init(crypto->decryptMAC, hmac_digest_len(type), type);
   if (ctx == NULL) {
     return -1;
@@ -264,9 +271,9 @@ int ssh_packet_hmac_verify(ssh_session session,
   hmac_final(ctx, hmacbuf, &hmaclen);
 
 #ifdef DEBUG_CRYPTO
-  ssh_print_hexa("received mac",mac,hmaclen);
-  ssh_print_hexa("Computed mac",hmacbuf,hmaclen);
-  ssh_print_hexa("seq",(unsigned char *)&seq,sizeof(uint32_t));
+  ssh_log_hexdump("received mac",mac,hmaclen);
+  ssh_log_hexdump("Computed mac",hmacbuf,hmaclen);
+  ssh_log_hexdump("seq",(unsigned char *)&seq,sizeof(uint32_t));
 #endif
   if (secure_memcmp(mac, hmacbuf, hmaclen) == 0) {
     return 0;

src/pcap.c

@@ -193,7 +193,7 @@ int ssh_pcap_file_write_packet(ssh_pcap_file pcap, ssh_buffer packet, uint32_t o
     }
 	err=ssh_pcap_file_write(pcap,header);
 error:
-	ssh_buffer_free(header);
+	SSH_BUFFER_FREE(header);
 	return err;
 }
 
@@ -255,7 +255,7 @@ int ssh_pcap_file_open(ssh_pcap_file pcap, const char *filename){
     }
 	err=ssh_pcap_file_write(pcap,header);
 error:
-	ssh_buffer_free(header);
+	SSH_BUFFER_FREE(header);
 	return err;
 }
 
@@ -500,7 +500,7 @@ int ssh_pcap_context_write(ssh_pcap_context ctx,
     rc = ssh_pcap_file_write_packet(ctx->file, ip, origlen + TCPIPHDR_LEN);
 
 error:
-    ssh_buffer_free(ip);
+    SSH_BUFFER_FREE(ip);
     return rc;
 }
 

src/pki.c

@@ -64,16 +64,22 @@
 #include "libssh/misc.h"
 #include "libssh/agent.h"
 
-enum ssh_keytypes_e pki_privatekey_type_from_string(const char *privkey) {
-    if (strncmp(privkey, DSA_HEADER_BEGIN, strlen(DSA_HEADER_BEGIN)) == 0) {
+enum ssh_keytypes_e pki_privatekey_type_from_string(const char *privkey)
+{
+    char *start = NULL;
+
+    start = strstr(privkey, DSA_HEADER_BEGIN);
+    if (start != NULL) {
         return SSH_KEYTYPE_DSS;
     }
 
-    if (strncmp(privkey, RSA_HEADER_BEGIN, strlen(RSA_HEADER_BEGIN)) == 0) {
+    start = strstr(privkey, RSA_HEADER_BEGIN);
+    if (start != NULL) {
         return SSH_KEYTYPE_RSA;
     }
 
-    if (strncmp(privkey, ECDSA_HEADER_BEGIN, strlen(ECDSA_HEADER_BEGIN)) == 0) {
+    start = strstr(privkey, ECDSA_HEADER_BEGIN);
+    if (start != 0) {
         /* We don't know what the curve is at this point, so we don't actually
          * know the type. We figure out the actual curve and fix things up in
          * pki_private_key_from_base64 */
@@ -156,12 +162,19 @@ void ssh_key_clean (ssh_key key){
     }
 #endif
     if (key->ed25519_privkey != NULL){
+#ifdef HAVE_OPENSSL_ED25519
+        /* In OpenSSL implementation the private key is only the private
+         * original seed. In the internal implementation the private key is the
+         * concatenation of the original private seed with the public key.*/
+        explicit_bzero(key->ed25519_privkey, ED25519_KEY_LEN);
+#else
         explicit_bzero(key->ed25519_privkey, sizeof(ed25519_privkey));
+#endif
         SAFE_FREE(key->ed25519_privkey);
     }
     SAFE_FREE(key->ed25519_pubkey);
     if (key->cert != NULL) {
-        ssh_buffer_free(key->cert);
+        SSH_BUFFER_FREE(key->cert);
     }
     key->cert_type = SSH_KEYTYPE_UNKNOWN;
     key->flags=SSH_KEY_FLAG_EMPTY;
@@ -292,7 +305,7 @@ const char *ssh_key_type_to_char(enum ssh_keytypes_e type) {
   return NULL;
 }
 
-static enum ssh_digest_e ssh_key_hash_from_name(const char *name)
+enum ssh_digest_e ssh_key_hash_from_name(const char *name)
 {
     if (name == NULL) {
         /* TODO we should rather fail */
@@ -382,6 +395,19 @@ enum ssh_digest_e ssh_key_type_to_hash(ssh_session session,
     case SSH_KEYTYPE_DSS:
         return SSH_DIGEST_SHA1;
     case SSH_KEYTYPE_RSA_CERT01:
+        /* If we are talking to an old OpenSSH version which does not support
+         * SHA2 in certificates */
+        if ((session->openssh > 0) &&
+            (session->openssh < SSH_VERSION_INT(7, 2, 0)))
+        {
+            SSH_LOG(SSH_LOG_DEBUG,
+                    "We are talking to an old OpenSSH (%x); "
+                    "returning SSH_DIGEST_SHA1",
+                    session->openssh);
+
+            return SSH_DIGEST_SHA1;
+        }
+        FALL_THROUGH;
     case SSH_KEYTYPE_RSA:
         if (ssh_key_algorithm_allowed(session, "rsa-sha2-512") &&
             (session->extensions & SSH_EXT_SIG_RSA_SHA512)) {
@@ -435,6 +461,21 @@ ssh_key_get_signature_algorithm(ssh_session session,
 {
     enum ssh_digest_e hash_type;
 
+    if (type == SSH_KEYTYPE_RSA_CERT01) {
+        /* If we are talking to an old OpenSSH version which does not support
+         * rsa-sha2-{256,512}-cert-v01@openssh.com */
+        if ((session->openssh > 0) &&
+            (session->openssh < SSH_VERSION_INT(7, 8, 0)))
+        {
+            SSH_LOG(SSH_LOG_DEBUG,
+                    "We are talking to an old OpenSSH (%x); "
+                    "using old cert format",
+                    session->openssh);
+
+            return "ssh-rsa-cert-v01@openssh.com";
+        }
+    }
+
     hash_type = ssh_key_type_to_hash(session, type);
 
     return ssh_key_signature_to_char(type, hash_type);
@@ -645,7 +686,10 @@ void ssh_signature_free(ssh_signature sig)
 #endif
             break;
         case SSH_KEYTYPE_ED25519:
+#ifndef HAVE_OPENSSL_ED25519
+            /* When using OpenSSL, the signature is stored in sig->raw_sig */
             SAFE_FREE(sig->ed25519_sig);
+#endif
             break;
         case SSH_KEYTYPE_DSS_CERT01:
         case SSH_KEYTYPE_RSA_CERT01:
@@ -661,7 +705,7 @@ void ssh_signature_free(ssh_signature sig)
 
     /* Explicitly zero the signature content before free */
     ssh_string_burn(sig->raw_sig);
-    ssh_string_free(sig->raw_sig);
+    SSH_STRING_FREE(sig->raw_sig);
     SAFE_FREE(sig);
 }
 
@@ -690,7 +734,7 @@ int ssh_pki_import_privkey_base64(const char *b64_key,
                                   ssh_key *pkey)
 {
     ssh_key key;
-    int cmp;
+    char *openssh_header = NULL;
 
     if (b64_key == NULL || pkey == NULL) {
         return SSH_ERROR;
@@ -705,9 +749,9 @@ int ssh_pki_import_privkey_base64(const char *b64_key,
             passphrase ? "true" : "false");
 
     /* Test for OpenSSH key format first */
-    cmp = strncmp(b64_key, OPENSSH_HEADER_BEGIN, strlen(OPENSSH_HEADER_BEGIN));
-    if (cmp == 0) {
-        key = ssh_pki_openssh_privkey_import(b64_key,
+    openssh_header = strstr(b64_key, OPENSSH_HEADER_BEGIN);
+    if (openssh_header != NULL) {
+        key = ssh_pki_openssh_privkey_import(openssh_header,
                                              passphrase,
                                              auth_fn,
                                              auth_data);
@@ -773,7 +817,7 @@ int ssh_pki_export_privkey_base64(const ssh_key privkey,
     }
 
     b64 = strndup(ssh_string_data(blob), ssh_string_len(blob));
-    ssh_string_free(blob);
+    SSH_STRING_FREE(blob);
     if (b64 == NULL) {
         return SSH_ERROR;
     }
@@ -935,7 +979,7 @@ int ssh_pki_export_privkey_file(const ssh_key privkey,
     }
 
     rc = fwrite(ssh_string_data(blob), ssh_string_len(blob), 1, fp);
-    ssh_string_free(blob);
+    SSH_STRING_FREE(blob);
     if (rc != 1 || ferror(fp)) {
         fclose(fp);
         unlink(filename);
@@ -1030,24 +1074,24 @@ int pki_import_privkey_buffer(enum ssh_keytypes_e type,
 
                 rc = pki_privkey_build_dss(key, p, q, g, pubkey, privkey);
 #ifdef DEBUG_CRYPTO
-                ssh_print_hexa("p", ssh_string_data(p), ssh_string_len(p));
-                ssh_print_hexa("q", ssh_string_data(q), ssh_string_len(q));
-                ssh_print_hexa("g", ssh_string_data(g), ssh_string_len(g));
-                ssh_print_hexa("pubkey", ssh_string_data(pubkey),
+                ssh_log_hexdump("p", ssh_string_data(p), ssh_string_len(p));
+                ssh_log_hexdump("q", ssh_string_data(q), ssh_string_len(q));
+                ssh_log_hexdump("g", ssh_string_data(g), ssh_string_len(g));
+                ssh_log_hexdump("pubkey", ssh_string_data(pubkey),
                                ssh_string_len(pubkey));
-                ssh_print_hexa("privkey", ssh_string_data(privkey),
+                ssh_log_hexdump("privkey", ssh_string_data(privkey),
                                ssh_string_len(privkey));
 #endif
                 ssh_string_burn(p);
-                ssh_string_free(p);
+                SSH_STRING_FREE(p);
                 ssh_string_burn(q);
-                ssh_string_free(q);
+                SSH_STRING_FREE(q);
                 ssh_string_burn(g);
-                ssh_string_free(g);
+                SSH_STRING_FREE(g);
                 ssh_string_burn(pubkey);
-                ssh_string_free(pubkey);
+                SSH_STRING_FREE(pubkey);
                 ssh_string_burn(privkey);
-                ssh_string_free(privkey);
+                SSH_STRING_FREE(privkey);
                 if (rc == SSH_ERROR) {
                     goto fail;
                 }
@@ -1071,26 +1115,26 @@ int pki_import_privkey_buffer(enum ssh_keytypes_e type,
 
                 rc = pki_privkey_build_rsa(key, n, e, d, iqmp, p, q);
 #ifdef DEBUG_CRYPTO
-                ssh_print_hexa("n", ssh_string_data(n), ssh_string_len(n));
-                ssh_print_hexa("e", ssh_string_data(e), ssh_string_len(e));
-                ssh_print_hexa("d", ssh_string_data(d), ssh_string_len(d));
-                ssh_print_hexa("iqmp", ssh_string_data(iqmp),
+                ssh_log_hexdump("n", ssh_string_data(n), ssh_string_len(n));
+                ssh_log_hexdump("e", ssh_string_data(e), ssh_string_len(e));
+                ssh_log_hexdump("d", ssh_string_data(d), ssh_string_len(d));
+                ssh_log_hexdump("iqmp", ssh_string_data(iqmp),
                                ssh_string_len(iqmp));
-                ssh_print_hexa("p", ssh_string_data(p), ssh_string_len(p));
-                ssh_print_hexa("q", ssh_string_data(q), ssh_string_len(q));
+                ssh_log_hexdump("p", ssh_string_data(p), ssh_string_len(p));
+                ssh_log_hexdump("q", ssh_string_data(q), ssh_string_len(q));
 #endif
                 ssh_string_burn(n);
-                ssh_string_free(n);
+                SSH_STRING_FREE(n);
                 ssh_string_burn(e);
-                ssh_string_free(e);
+                SSH_STRING_FREE(e);
                 ssh_string_burn(d);
-                ssh_string_free(d);
+                SSH_STRING_FREE(d);
                 ssh_string_burn(iqmp);
-                ssh_string_free(iqmp);
+                SSH_STRING_FREE(iqmp);
                 ssh_string_burn(p);
-                ssh_string_free(p);
+                SSH_STRING_FREE(p);
                 ssh_string_burn(q);
-                ssh_string_free(q);
+                SSH_STRING_FREE(q);
                 if (rc == SSH_ERROR) {
                     SSH_LOG(SSH_LOG_WARN, "Failed to build RSA private key");
                     goto fail;
@@ -1114,16 +1158,16 @@ int pki_import_privkey_buffer(enum ssh_keytypes_e type,
                 }
 
                 nid = pki_key_ecdsa_nid_from_name(ssh_string_get_char(i));
-                ssh_string_free(i);
+                SSH_STRING_FREE(i);
                 if (nid == -1) {
                     goto fail;
                 }
 
                 rc = pki_privkey_build_ecdsa(key, nid, e, exp);
                 ssh_string_burn(e);
-                ssh_string_free(e);
+                SSH_STRING_FREE(e);
                 ssh_string_burn(exp);
-                ssh_string_free(exp);
+                SSH_STRING_FREE(exp);
                 if (rc < 0) {
                     SSH_LOG(SSH_LOG_WARN, "Failed to build ECDSA private key");
                     goto fail;
@@ -1143,8 +1187,8 @@ int pki_import_privkey_buffer(enum ssh_keytypes_e type,
 
                 rc = pki_privkey_build_ed25519(key, pubkey, privkey);
                 ssh_string_burn(privkey);
-                ssh_string_free(privkey);
-                ssh_string_free(pubkey);
+                SSH_STRING_FREE(privkey);
+                SSH_STRING_FREE(pubkey);
                 if (rc != SSH_OK) {
                     SSH_LOG(SSH_LOG_WARN, "Failed to build ed25519 key");
                     goto fail;
@@ -1203,18 +1247,18 @@ static int pki_import_pubkey_buffer(ssh_buffer buffer,
 
                 rc = pki_pubkey_build_dss(key, p, q, g, pubkey);
 #ifdef DEBUG_CRYPTO
-                ssh_print_hexa("p", ssh_string_data(p), ssh_string_len(p));
-                ssh_print_hexa("q", ssh_string_data(q), ssh_string_len(q));
-                ssh_print_hexa("g", ssh_string_data(g), ssh_string_len(g));
+                ssh_log_hexdump("p", ssh_string_data(p), ssh_string_len(p));
+                ssh_log_hexdump("q", ssh_string_data(q), ssh_string_len(q));
+                ssh_log_hexdump("g", ssh_string_data(g), ssh_string_len(g));
 #endif
                 ssh_string_burn(p);
-                ssh_string_free(p);
+                SSH_STRING_FREE(p);
                 ssh_string_burn(q);
-                ssh_string_free(q);
+                SSH_STRING_FREE(q);
                 ssh_string_burn(g);
-                ssh_string_free(g);
+                SSH_STRING_FREE(g);
                 ssh_string_burn(pubkey);
-                ssh_string_free(pubkey);
+                SSH_STRING_FREE(pubkey);
                 if (rc == SSH_ERROR) {
                     SSH_LOG(SSH_LOG_WARN, "Failed to build DSA public key");
                     goto fail;
@@ -1234,13 +1278,13 @@ static int pki_import_pubkey_buffer(ssh_buffer buffer,
 
                 rc = pki_pubkey_build_rsa(key, e, n);
 #ifdef DEBUG_CRYPTO
-                ssh_print_hexa("e", ssh_string_data(e), ssh_string_len(e));
-                ssh_print_hexa("n", ssh_string_data(n), ssh_string_len(n));
+                ssh_log_hexdump("e", ssh_string_data(e), ssh_string_len(e));
+                ssh_log_hexdump("n", ssh_string_data(n), ssh_string_len(n));
 #endif
                 ssh_string_burn(e);
-                ssh_string_free(e);
+                SSH_STRING_FREE(e);
                 ssh_string_burn(n);
-                ssh_string_free(n);
+                SSH_STRING_FREE(n);
                 if (rc == SSH_ERROR) {
                     SSH_LOG(SSH_LOG_WARN, "Failed to build RSA public key");
                     goto fail;
@@ -1264,14 +1308,14 @@ static int pki_import_pubkey_buffer(ssh_buffer buffer,
                 }
 
                 nid = pki_key_ecdsa_nid_from_name(ssh_string_get_char(i));
-                ssh_string_free(i);
+                SSH_STRING_FREE(i);
                 if (nid == -1) {
                     goto fail;
                 }
 
                 rc = pki_pubkey_build_ecdsa(key, nid, e);
                 ssh_string_burn(e);
-                ssh_string_free(e);
+                SSH_STRING_FREE(e);
                 if (rc < 0) {
                     SSH_LOG(SSH_LOG_WARN, "Failed to build ECDSA public key");
                     goto fail;
@@ -1287,23 +1331,23 @@ static int pki_import_pubkey_buffer(ssh_buffer buffer,
         case SSH_KEYTYPE_ED25519:
         {
             ssh_string pubkey = ssh_buffer_get_ssh_string(buffer);
-            if (ssh_string_len(pubkey) != ED25519_PK_LEN) {
+            if (ssh_string_len(pubkey) != ED25519_KEY_LEN) {
                 SSH_LOG(SSH_LOG_WARN, "Invalid public key length");
                 ssh_string_burn(pubkey);
-                ssh_string_free(pubkey);
+                SSH_STRING_FREE(pubkey);
                 goto fail;
             }
 
-            key->ed25519_pubkey = malloc(ED25519_PK_LEN);
+            key->ed25519_pubkey = malloc(ED25519_KEY_LEN);
             if (key->ed25519_pubkey == NULL) {
                 ssh_string_burn(pubkey);
-                ssh_string_free(pubkey);
+                SSH_STRING_FREE(pubkey);
                 goto fail;
             }
 
-            memcpy(key->ed25519_pubkey, ssh_string_data(pubkey), ED25519_PK_LEN);
+            memcpy(key->ed25519_pubkey, ssh_string_data(pubkey), ED25519_KEY_LEN);
             ssh_string_burn(pubkey);
-            ssh_string_free(pubkey);
+            SSH_STRING_FREE(pubkey);
         }
         break;
         case SSH_KEYTYPE_DSS_CERT01:
@@ -1405,7 +1449,7 @@ static int pki_import_cert_buffer(ssh_buffer buffer,
 
 fail:
     ssh_key_free(key);
-    ssh_buffer_free(cert);
+    SSH_BUFFER_FREE(cert);
     return SSH_ERROR;
 }
 
@@ -1441,17 +1485,17 @@ int ssh_pki_import_pubkey_base64(const char *b64_key,
 
     type_s = ssh_buffer_get_ssh_string(buffer);
     if (type_s == NULL) {
-        ssh_buffer_free(buffer);
+        SSH_BUFFER_FREE(buffer);
         return SSH_ERROR;
     }
-    ssh_string_free(type_s);
+    SSH_STRING_FREE(type_s);
 
     if (is_cert_type(type)) {
         rc = pki_import_cert_buffer(buffer, type, pkey);
     } else {
         rc = pki_import_pubkey_buffer(buffer, type, pkey);
     }
-    ssh_buffer_free(buffer);
+    SSH_BUFFER_FREE(buffer);
 
     return rc;
 }
@@ -1506,7 +1550,7 @@ int ssh_pki_import_pubkey_blob(const ssh_string key_blob,
         SSH_LOG(SSH_LOG_WARN, "Unknown key type found!");
         goto fail;
     }
-    ssh_string_free(type_s);
+    SSH_STRING_FREE(type_s);
 
     if (is_cert_type(type)) {
         rc = pki_import_cert_buffer(buffer, type, pkey);
@@ -1514,12 +1558,12 @@ int ssh_pki_import_pubkey_blob(const ssh_string key_blob,
         rc = pki_import_pubkey_buffer(buffer, type, pkey);
     }
 
-    ssh_buffer_free(buffer);
+    SSH_BUFFER_FREE(buffer);
 
     return rc;
 fail:
-    ssh_buffer_free(buffer);
-    ssh_string_free(type_s);
+    SSH_BUFFER_FREE(buffer);
+    SSH_STRING_FREE(type_s);
 
     return SSH_ERROR;
 }
@@ -1837,7 +1881,7 @@ int ssh_pki_export_privkey_to_pubkey(const ssh_key privkey,
  *
  * @return              SSH_OK on success, SSH_ERROR otherwise.
  *
- * @see ssh_string_free()
+ * @see SSH_STRING_FREE()
  */
 int ssh_pki_export_pubkey_blob(const ssh_key key,
                                ssh_string *pblob)
@@ -1867,7 +1911,7 @@ int ssh_pki_export_pubkey_blob(const ssh_key key,
  *
  * @return              SSH_OK on success, SSH_ERROR on error.
  *
- * @see ssh_string_free_char()
+ * @see SSH_STRING_FREE_CHAR()
  */
 int ssh_pki_export_pubkey_base64(const ssh_key key,
                                  char **b64_key)
@@ -1885,7 +1929,7 @@ int ssh_pki_export_pubkey_base64(const ssh_key key,
     }
 
     b64 = bin_to_base64(ssh_string_data(key_blob), ssh_string_len(key_blob));
-    ssh_string_free(key_blob);
+    SSH_STRING_FREE(key_blob);
     if (b64 == NULL) {
         return SSH_ERROR;
     }
@@ -1985,7 +2029,7 @@ int ssh_pki_copy_cert_to_privkey(const ssh_key certkey, ssh_key privkey) {
 
   rc = ssh_buffer_add_buffer(cert_buffer, certkey->cert);
   if (rc != 0) {
-      ssh_buffer_free(cert_buffer);
+      SSH_BUFFER_FREE(cert_buffer);
       return SSH_ERROR;
   }
 
@@ -2012,38 +2056,38 @@ int ssh_pki_export_signature_blob(const ssh_signature sig,
 
     str = ssh_string_from_char(sig->type_c);
     if (str == NULL) {
-        ssh_buffer_free(buf);
+        SSH_BUFFER_FREE(buf);
         return SSH_ERROR;
     }
 
     rc = ssh_buffer_add_ssh_string(buf, str);
-    ssh_string_free(str);
+    SSH_STRING_FREE(str);
     if (rc < 0) {
-        ssh_buffer_free(buf);
+        SSH_BUFFER_FREE(buf);
         return SSH_ERROR;
     }
 
     str = pki_signature_to_blob(sig);
     if (str == NULL) {
-        ssh_buffer_free(buf);
+        SSH_BUFFER_FREE(buf);
         return SSH_ERROR;
     }
 
     rc = ssh_buffer_add_ssh_string(buf, str);
-    ssh_string_free(str);
+    SSH_STRING_FREE(str);
     if (rc < 0) {
-        ssh_buffer_free(buf);
+        SSH_BUFFER_FREE(buf);
         return SSH_ERROR;
     }
 
     str = ssh_string_new(ssh_buffer_get_len(buf));
     if (str == NULL) {
-        ssh_buffer_free(buf);
+        SSH_BUFFER_FREE(buf);
         return SSH_ERROR;
     }
 
     ssh_string_fill(str, ssh_buffer_get(buf), ssh_buffer_get_len(buf));
-    ssh_buffer_free(buf);
+    SSH_BUFFER_FREE(buf);
 
     *sig_blob = str;
 
@@ -2075,29 +2119,29 @@ int ssh_pki_import_signature_blob(const ssh_string sig_blob,
                              ssh_string_data(sig_blob),
                              ssh_string_len(sig_blob));
     if (rc < 0) {
-        ssh_buffer_free(buf);
+        SSH_BUFFER_FREE(buf);
         return SSH_ERROR;
     }
 
     algorithm = ssh_buffer_get_ssh_string(buf);
     if (algorithm == NULL) {
-        ssh_buffer_free(buf);
+        SSH_BUFFER_FREE(buf);
         return SSH_ERROR;
     }
 
     alg = ssh_string_get_char(algorithm);
     type = ssh_key_type_from_signature_name(alg);
     hash_type = ssh_key_hash_from_name(alg);
-    ssh_string_free(algorithm);
+    SSH_STRING_FREE(algorithm);
 
     blob = ssh_buffer_get_ssh_string(buf);
-    ssh_buffer_free(buf);
+    SSH_BUFFER_FREE(buf);
     if (blob == NULL) {
         return SSH_ERROR;
     }
 
     sig = pki_signature_from_blob(pubkey, blob, type, hash_type);
-    ssh_string_free(blob);
+    SSH_STRING_FREE(blob);
     if (sig == NULL) {
         return SSH_ERROR;
     }
@@ -2195,7 +2239,7 @@ int pki_key_check_hash_compatible(ssh_key key,
 int ssh_pki_signature_verify(ssh_session session,
                              ssh_signature sig,
                              const ssh_key key,
-                             unsigned char *input,
+                             const unsigned char *input,
                              size_t input_len)
 {
     int rc;
@@ -2225,7 +2269,7 @@ int ssh_pki_signature_verify(ssh_session session,
         return SSH_ERROR;
     }
 
-    rc = pki_signature_verify(session, sig, key, input, input_len);
+    rc = pki_verify_data_signature(sig, key, input, input_len);
 
     return rc;
 }
@@ -2249,12 +2293,6 @@ ssh_signature pki_do_sign(const ssh_key privkey,
         return NULL;
     }
 
-    if (privkey->type == SSH_KEYTYPE_ED25519 ||
-        privkey->type == SSH_KEYTYPE_ED25519_CERT01)
-    {
-        return pki_do_sign_hash(privkey, input, input_len, SSH_DIGEST_AUTO);
-    }
-
     return pki_sign_data(privkey, hash_type, input, input_len);
 }
 
@@ -2328,8 +2366,8 @@ ssh_string ssh_pki_do_sign(ssh_session session,
 
 end:
     ssh_signature_free(sig);
-    ssh_buffer_free(sign_input);
-    ssh_string_free(session_id);
+    SSH_BUFFER_FREE(sign_input);
+    SSH_STRING_FREE(session_id);
 
     return sig_blob;
 }
@@ -2346,6 +2384,9 @@ ssh_string ssh_pki_do_sign_agent(ssh_session session,
     int rc;
 
     crypto = ssh_packet_get_current_crypto(session, SSH_DIRECTION_BOTH);
+    if (crypto == NULL) {
+        return NULL;
+    }
 
     /* prepend session identifier */
     session_id = ssh_string_new(crypto->digest_len);
@@ -2356,28 +2397,28 @@ ssh_string ssh_pki_do_sign_agent(ssh_session session,
 
     sig_buf = ssh_buffer_new();
     if (sig_buf == NULL) {
-        ssh_string_free(session_id);
+        SSH_STRING_FREE(session_id);
         return NULL;
     }
 
     rc = ssh_buffer_add_ssh_string(sig_buf, session_id);
     if (rc < 0) {
-        ssh_string_free(session_id);
-        ssh_buffer_free(sig_buf);
+        SSH_STRING_FREE(session_id);
+        SSH_BUFFER_FREE(sig_buf);
         return NULL;
     }
-    ssh_string_free(session_id);
+    SSH_STRING_FREE(session_id);
 
     /* append out buffer */
     if (ssh_buffer_add_buffer(sig_buf, buf) < 0) {
-        ssh_buffer_free(sig_buf);
+        SSH_BUFFER_FREE(sig_buf);
         return NULL;
     }
 
     /* create signature */
     sig_blob = ssh_agent_sign_data(session, pubkey, sig_buf);
 
-    ssh_buffer_free(sig_buf);
+    SSH_BUFFER_FREE(sig_buf);
 
     return sig_blob;
 }
@@ -2385,7 +2426,8 @@ ssh_string ssh_pki_do_sign_agent(ssh_session session,
 
 #ifdef WITH_SERVER
 ssh_string ssh_srv_pki_do_sign_sessionid(ssh_session session,
-                                         const ssh_key privkey)
+                                         const ssh_key privkey,
+                                         const enum ssh_digest_e digest)
 {
     struct ssh_crypto_struct *crypto = NULL;
 
@@ -2394,8 +2436,6 @@ ssh_string ssh_srv_pki_do_sign_sessionid(ssh_session session,
 
     ssh_buffer sign_input = NULL;
 
-    enum ssh_digest_e hash_type;
-
     int rc;
 
     if (session == NULL || privkey == NULL || !ssh_key_is_private(privkey)) {
@@ -2410,9 +2450,6 @@ ssh_string ssh_srv_pki_do_sign_sessionid(ssh_session session,
         return NULL;
     }
 
-    /* Get the hash type from the key type */
-    hash_type = ssh_key_type_to_hash(session, privkey->type);
-
     /* Fill the input */
     sign_input = ssh_buffer_new();
     if (sign_input == NULL) {
@@ -2432,7 +2469,7 @@ ssh_string ssh_srv_pki_do_sign_sessionid(ssh_session session,
     sig = pki_do_sign(privkey,
             ssh_buffer_get(sign_input),
             ssh_buffer_get_len(sign_input),
-            hash_type);
+            digest);
     if (sig == NULL) {
         goto end;
     }
@@ -2445,7 +2482,7 @@ ssh_string ssh_srv_pki_do_sign_sessionid(ssh_session session,
 
 end:
     ssh_signature_free(sig);
-    ssh_buffer_free(sign_input);
+    SSH_BUFFER_FREE(sign_input);
 
     return sig_blob;
 }

src/pki_container_openssh.c

@@ -108,11 +108,11 @@ static int pki_private_key_decrypt(ssh_string blob,
 {
     struct ssh_cipher_struct *ciphers = ssh_get_ciphertab();
     struct ssh_cipher_struct cipher;
-    uint8_t key_material[128];
-    char passphrase_buffer[128];
+    uint8_t key_material[128] = {0};
+    char passphrase_buffer[128] = {0};
     size_t key_material_len;
-    ssh_buffer buffer;
-    ssh_string salt;
+    ssh_buffer buffer = NULL;
+    ssh_string salt = NULL;
     uint32_t rounds;
     int cmp;
     int rc;
@@ -159,7 +159,7 @@ static int pki_private_key_decrypt(ssh_string blob,
     if (rc != SSH_ERROR){
         rc = ssh_buffer_unpack(buffer, "Sd", &salt, &rounds);
     }
-    ssh_buffer_free(buffer);
+    SSH_BUFFER_FREE(buffer);
     if (rc == SSH_ERROR){
         return SSH_ERROR;
     }
@@ -233,7 +233,7 @@ ssh_pki_openssh_import(const char *text_key,
                        void *auth_data,
                        bool private)
 {
-    const char *ptr=text_key;
+    const char *ptr = text_key;
     const char *end;
     char *base64;
     int cmp;
@@ -250,7 +250,7 @@ ssh_pki_openssh_import(const char *text_key,
     uint8_t padding;
 
     cmp = strncmp(ptr, OPENSSH_HEADER_BEGIN, strlen(OPENSSH_HEADER_BEGIN));
-    if (cmp != 0){
+    if (cmp != 0) {
         SSH_LOG(SSH_LOG_WARN, "Not an OpenSSH private key (no header)");
         goto out;
     }
@@ -259,15 +259,15 @@ ssh_pki_openssh_import(const char *text_key,
         ptr++;
     }
     end = strstr(ptr, OPENSSH_HEADER_END);
-    if (end == NULL){
+    if (end == NULL) {
         SSH_LOG(SSH_LOG_WARN, "Not an OpenSSH private key (no footer)");
         goto out;
     }
     base64 = malloc(end - ptr + 1);
-    if (base64 == NULL){
+    if (base64 == NULL) {
         goto out;
     }
-    for (i = 0; ptr < end; ptr++){
+    for (i = 0; ptr < end; ptr++) {
         if (!isspace((int)ptr[0])) {
             base64[i] = ptr[0];
             i++;
@@ -276,7 +276,7 @@ ssh_pki_openssh_import(const char *text_key,
     base64[i] = '\0';
     buffer = base64_to_bin(base64);
     SAFE_FREE(base64);
-    if (buffer == NULL){
+    if (buffer == NULL) {
         SSH_LOG(SSH_LOG_WARN, "Not an OpenSSH private key (base64 error)");
         goto out;
     }
@@ -289,21 +289,21 @@ ssh_pki_openssh_import(const char *text_key,
                            &nkeys,
                            &pubkey0,
                            &privkeys);
-    if (rc == SSH_ERROR){
+    if (rc == SSH_ERROR) {
         SSH_LOG(SSH_LOG_WARN, "Not an OpenSSH private key (unpack error)");
         goto out;
     }
     cmp = strncmp(magic, OPENSSH_AUTH_MAGIC, strlen(OPENSSH_AUTH_MAGIC));
-    if (cmp != 0){
+    if (cmp != 0) {
         SSH_LOG(SSH_LOG_WARN, "Not an OpenSSH private key (bad magic)");
         goto out;
     }
     SSH_LOG(SSH_LOG_INFO,
-            "Opening OpenSSH private key: ciphername: %s, kdf: %s, nkeys: %d\n",
+            "Opening OpenSSH private key: ciphername: %s, kdf: %s, nkeys: %d",
             ciphername,
             kdfname,
             nkeys);
-    if (nkeys != 1){
+    if (nkeys != 1) {
         SSH_LOG(SSH_LOG_WARN, "Opening OpenSSH private key: only 1 key supported (%d available)", nkeys);
         goto out;
     }
@@ -327,7 +327,7 @@ ssh_pki_openssh_import(const char *text_key,
                                  kdfoptions,
                                  auth_fn,
                                  auth_data);
-    if (rc == SSH_ERROR){
+    if (rc == SSH_ERROR) {
         goto out;
     }
 
@@ -342,20 +342,20 @@ ssh_pki_openssh_import(const char *text_key,
                         ssh_string_len(privkeys));
 
     rc = ssh_buffer_unpack(privkey_buffer, "dd", &checkint1, &checkint2);
-    if (rc == SSH_ERROR || checkint1 != checkint2){
+    if (rc == SSH_ERROR || checkint1 != checkint2) {
         SSH_LOG(SSH_LOG_WARN, "OpenSSH private key unpack error (correct password?)");
         goto out;
     }
     rc = pki_openssh_import_privkey_blob(privkey_buffer, &key);
-    if (rc == SSH_ERROR){
+    if (rc == SSH_ERROR) {
         goto out;
     }
     comment = ssh_buffer_get_ssh_string(privkey_buffer);
     SAFE_FREE(comment);
     /* verify that the remaining data is correct padding */
-    for (i=1; ssh_buffer_get_len(privkey_buffer) > 0; ++i){
+    for (i = 1; ssh_buffer_get_len(privkey_buffer) > 0; ++i) {
         ssh_buffer_get_u8(privkey_buffer, &padding);
-        if (padding != i){
+        if (padding != i) {
             ssh_key_free(key);
             key = NULL;
             SSH_LOG(SSH_LOG_WARN, "Invalid padding");
@@ -364,11 +364,11 @@ ssh_pki_openssh_import(const char *text_key,
     }
 out:
     if (buffer != NULL) {
-        ssh_buffer_free(buffer);
+        SSH_BUFFER_FREE(buffer);
         buffer = NULL;
     }
     if (privkey_buffer != NULL) {
-        ssh_buffer_free(privkey_buffer);
+        SSH_BUFFER_FREE(privkey_buffer);
         privkey_buffer = NULL;
     }
     SAFE_FREE(magic);
@@ -415,12 +415,13 @@ static int pki_openssh_export_privkey_blob(const ssh_key privkey,
         return SSH_ERROR;
     }
     rc = ssh_buffer_pack(buffer,
-                         "sdPdP",
+                         "sdPdPP",
                          privkey->type_c,
-                         (uint32_t)ED25519_PK_LEN,
-                         (size_t)ED25519_PK_LEN, privkey->ed25519_pubkey,
-                         (uint32_t)ED25519_SK_LEN,
-                         (size_t)ED25519_SK_LEN, privkey->ed25519_privkey);
+                         (uint32_t)ED25519_KEY_LEN,
+                         (size_t)ED25519_KEY_LEN, privkey->ed25519_pubkey,
+                         (uint32_t)(2 * ED25519_KEY_LEN),
+                         (size_t)ED25519_KEY_LEN, privkey->ed25519_privkey,
+                         (size_t)ED25519_KEY_LEN, privkey->ed25519_pubkey);
     return rc;
 }
 
@@ -439,9 +440,9 @@ static int pki_private_key_encrypt(ssh_buffer privkey_buffer,
 {
     struct ssh_cipher_struct *ciphers = ssh_get_ciphertab();
     struct ssh_cipher_struct cipher;
-    uint8_t key_material[128];
+    uint8_t key_material[128] = {0};
     size_t key_material_len;
-    char passphrase_buffer[128];
+    char passphrase_buffer[128] = {0};
     int rc;
     int i;
     int cmp;
@@ -619,26 +620,26 @@ ssh_string ssh_pki_openssh_privkey_export(const ssh_key privkey,
 
         salt = ssh_string_new(16);
         if (salt == NULL){
-            ssh_buffer_free(kdf_buf);
+            SSH_BUFFER_FREE(kdf_buf);
             goto error;
         }
 
         ok = ssh_get_random(ssh_string_data(salt), 16, 0);
         if (!ok) {
-            ssh_buffer_free(kdf_buf);
+            SSH_BUFFER_FREE(kdf_buf);
             goto error;
         }
 
         ssh_buffer_pack(kdf_buf, "Sd", salt, rounds);
         kdf_options = ssh_string_new(ssh_buffer_get_len(kdf_buf));
         if (kdf_options == NULL){
-            ssh_buffer_free(kdf_buf);
+            SSH_BUFFER_FREE(kdf_buf);
             goto error;
         }
         memcpy(ssh_string_data(kdf_options),
                ssh_buffer_get(kdf_buf),
                ssh_buffer_get_len(kdf_buf));
-        ssh_buffer_free(kdf_buf);
+        SSH_BUFFER_FREE(kdf_buf);
         rc = pki_private_key_encrypt(privkey_buffer,
                                      passphrase,
                                      "aes128-cbc",
@@ -700,7 +701,7 @@ ssh_string ssh_pki_openssh_privkey_export(const ssh_key privkey,
     str_len = ssh_buffer_get_len(buffer);
     len = ssh_buffer_get_data(buffer, ssh_string_data(str), str_len);
     if (str_len != len) {
-        ssh_string_free(str);
+        SSH_STRING_FREE(str);
         str = NULL;
     }
 
@@ -708,13 +709,13 @@ error:
     if (privkey_buffer != NULL) {
         void *bufptr = ssh_buffer_get(privkey_buffer);
         explicit_bzero(bufptr, ssh_buffer_get_len(privkey_buffer));
-        ssh_buffer_free(privkey_buffer);
+        SSH_BUFFER_FREE(privkey_buffer);
     }
     SAFE_FREE(pubkey_s);
     SAFE_FREE(kdf_options);
     SAFE_FREE(salt);
     if (buffer != NULL) {
-        ssh_buffer_free(buffer);
+        SSH_BUFFER_FREE(buffer);
     }
 
     return str;

src/pki_crypto.c

@@ -183,7 +183,7 @@ static ssh_string make_ecpoint_string(const EC_GROUP *g,
                              ssh_string_len(s),
                              NULL);
     if (len != ssh_string_len(s)) {
-        ssh_string_free(s);
+        SSH_STRING_FREE(s);
         return NULL;
     }
 
@@ -529,7 +529,7 @@ int pki_key_generate_rsa(ssh_key key, int parameter){
 
 	BN_free(e);
 
-	if (rc == -1 || key->rsa == NULL)
+	if (rc <= 0 || key->rsa == NULL)
 		return SSH_ERROR;
 	return SSH_OK;
 }
@@ -730,29 +730,58 @@ ssh_string pki_private_key_to_pem(const ssh_key key,
         return NULL;
     }
 
-    pkey = EVP_PKEY_new();
-    if (pkey == NULL) {
-        goto err;
-    }
-
     switch (key->type) {
         case SSH_KEYTYPE_DSS:
+            pkey = EVP_PKEY_new();
+            if (pkey == NULL) {
+                goto err;
+            }
+
             rc = EVP_PKEY_set1_DSA(pkey, key->dsa);
             break;
         case SSH_KEYTYPE_RSA:
         case SSH_KEYTYPE_RSA1:
+            pkey = EVP_PKEY_new();
+            if (pkey == NULL) {
+                goto err;
+            }
+
             rc = EVP_PKEY_set1_RSA(pkey, key->rsa);
             break;
 #ifdef HAVE_ECC
         case SSH_KEYTYPE_ECDSA_P256:
         case SSH_KEYTYPE_ECDSA_P384:
         case SSH_KEYTYPE_ECDSA_P521:
+            pkey = EVP_PKEY_new();
+            if (pkey == NULL) {
+                goto err;
+            }
+
             rc = EVP_PKEY_set1_EC_KEY(pkey, key->ecdsa);
             break;
 #endif
         case SSH_KEYTYPE_ED25519:
+#ifdef HAVE_OPENSSL_ED25519
+            /* In OpenSSL, the input is the private key seed only, which means
+             * the first half of the SSH private key (the second half is the
+             * public key) */
+            pkey = EVP_PKEY_new_raw_private_key(EVP_PKEY_ED25519, NULL,
+                    (const uint8_t *)key->ed25519_privkey,
+                    ED25519_KEY_LEN);
+            if (pkey == NULL) {
+                SSH_LOG(SSH_LOG_TRACE,
+                        "Failed to create ed25519 EVP_PKEY: %s",
+                        ERR_error_string(ERR_get_error(), NULL));
+                goto err;
+            }
+
+            /* Mark the operation as successful as for the other key types */
+            rc = 1;
+            break;
+#else
             SSH_LOG(SSH_LOG_WARN, "PEM output not supported for key type ssh-ed25519");
             goto err;
+#endif
         case SSH_KEYTYPE_DSS_CERT01:
         case SSH_KEYTYPE_RSA_CERT01:
         case SSH_KEYTYPE_ECDSA_P256_CERT01:
@@ -821,7 +850,11 @@ ssh_key pki_private_key_from_base64(const char *b64_key,
     BIO *mem = NULL;
     DSA *dsa = NULL;
     RSA *rsa = NULL;
+#ifdef HAVE_OPENSSL_ED25519
+    uint8_t *ed25519 = NULL;
+#else
     ed25519_privkey *ed25519 = NULL;
+#endif
     ssh_key key = NULL;
     enum ssh_keytypes_e type = SSH_KEYTYPE_UNKNOWN;
 #ifdef HAVE_OPENSSL_ECC
@@ -861,7 +894,7 @@ ssh_key pki_private_key_from_base64(const char *b64_key,
             SSH_LOG(SSH_LOG_WARN,
                     "Parsing private key: %s",
                     ERR_error_string(ERR_get_error(),NULL));
-            return NULL;
+            goto fail;
         }
         type = SSH_KEYTYPE_DSS;
         break;
@@ -871,7 +904,7 @@ ssh_key pki_private_key_from_base64(const char *b64_key,
             SSH_LOG(SSH_LOG_WARN,
                     "Parsing private key: %s",
                     ERR_error_string(ERR_get_error(),NULL));
-            return NULL;
+            goto fail;
         }
         type = SSH_KEYTYPE_RSA;
         break;
@@ -882,7 +915,7 @@ ssh_key pki_private_key_from_base64(const char *b64_key,
             SSH_LOG(SSH_LOG_WARN,
                     "Parsing private key: %s",
                     ERR_error_string(ERR_get_error(), NULL));
-            return NULL;
+            goto fail;
         }
 
         /* pki_privatekey_type_from_string always returns P256 for ECDSA
@@ -894,6 +927,43 @@ ssh_key pki_private_key_from_base64(const char *b64_key,
         }
 
         break;
+#endif
+#ifdef HAVE_OPENSSL_ED25519
+    case EVP_PKEY_ED25519:
+    {
+        size_t key_len;
+        int evp_rc = 0;
+
+        /* Get the key length */
+        evp_rc = EVP_PKEY_get_raw_private_key(pkey, NULL, &key_len);
+        if (evp_rc != 1) {
+            SSH_LOG(SSH_LOG_TRACE,
+                    "Failed to get ed25519 raw private key length:  %s",
+                    ERR_error_string(ERR_get_error(), NULL));
+            goto fail;
+        }
+
+        if (key_len != ED25519_KEY_LEN) {
+            goto fail;
+        }
+
+        ed25519 = malloc(key_len);
+        if (ed25519 == NULL) {
+            SSH_LOG(SSH_LOG_WARN, "Out of memory");
+            goto fail;
+        }
+
+        evp_rc = EVP_PKEY_get_raw_private_key(pkey, (uint8_t *)ed25519,
+                                              &key_len);
+        if (evp_rc != 1) {
+            SSH_LOG(SSH_LOG_TRACE,
+                    "Failed to get ed25519 raw private key:  %s",
+                    ERR_error_string(ERR_get_error(), NULL));
+            goto fail;
+        }
+        type = SSH_KEYTYPE_ED25519;
+    }
+    break;
 #endif
     default:
         EVP_PKEY_free(pkey);
@@ -923,13 +993,16 @@ ssh_key pki_private_key_from_base64(const char *b64_key,
 
     return key;
 fail:
+    EVP_PKEY_free(pkey);
     ssh_key_free(key);
     DSA_free(dsa);
     RSA_free(rsa);
 #ifdef HAVE_OPENSSL_ECC
     EC_KEY_free(ecdsa);
 #endif
-
+#ifdef HAVE_OPENSSL_ED25519
+    SAFE_FREE(ed25519);
+#endif
     return NULL;
 }
 
@@ -1117,7 +1190,7 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
     if (key->cert != NULL) {
         rc = ssh_buffer_add_buffer(buffer, key->cert);
         if (rc < 0) {
-            ssh_buffer_free(buffer);
+            SSH_BUFFER_FREE(buffer);
             return NULL;
         }
         goto makestring;
@@ -1125,14 +1198,14 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
 
     type_s = ssh_string_from_char(key->type_c);
     if (type_s == NULL) {
-        ssh_buffer_free(buffer);
+        SSH_BUFFER_FREE(buffer);
         return NULL;
     }
 
     rc = ssh_buffer_add_ssh_string(buffer, type_s);
-    ssh_string_free(type_s);
+    SSH_STRING_FREE(type_s);
     if (rc < 0) {
-        ssh_buffer_free(buffer);
+        SSH_BUFFER_FREE(buffer);
         return NULL;
     }
 
@@ -1175,16 +1248,16 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
             }
 
             ssh_string_burn(p);
-            ssh_string_free(p);
+            SSH_STRING_FREE(p);
             p = NULL;
             ssh_string_burn(g);
-            ssh_string_free(g);
+            SSH_STRING_FREE(g);
             g = NULL;
             ssh_string_burn(q);
-            ssh_string_free(q);
+            SSH_STRING_FREE(q);
             q = NULL;
             ssh_string_burn(n);
-            ssh_string_free(n);
+            SSH_STRING_FREE(n);
             n = NULL;
 
             break;
@@ -1211,10 +1284,10 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
             }
 
             ssh_string_burn(e);
-            ssh_string_free(e);
+            SSH_STRING_FREE(e);
             e = NULL;
             ssh_string_burn(n);
-            ssh_string_free(n);
+            SSH_STRING_FREE(n);
             n = NULL;
 
             break;
@@ -1231,21 +1304,21 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
 #ifdef HAVE_OPENSSL_ECC
             type_s = ssh_string_from_char(pki_key_ecdsa_nid_to_char(key->ecdsa_nid));
             if (type_s == NULL) {
-                ssh_buffer_free(buffer);
+                SSH_BUFFER_FREE(buffer);
                 return NULL;
             }
 
             rc = ssh_buffer_add_ssh_string(buffer, type_s);
-            ssh_string_free(type_s);
+            SSH_STRING_FREE(type_s);
             if (rc < 0) {
-                ssh_buffer_free(buffer);
+                SSH_BUFFER_FREE(buffer);
                 return NULL;
             }
 
             e = make_ecpoint_string(EC_KEY_get0_group(key->ecdsa),
                                     EC_KEY_get0_public_key(key->ecdsa));
             if (e == NULL) {
-                ssh_buffer_free(buffer);
+                SSH_BUFFER_FREE(buffer);
                 return NULL;
             }
 
@@ -1255,7 +1328,7 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
             }
 
             ssh_string_burn(e);
-            ssh_string_free(e);
+            SSH_STRING_FREE(e);
             e = NULL;
 
             break;
@@ -1275,23 +1348,23 @@ makestring:
     if (rc < 0) {
         goto fail;
     }
-    ssh_buffer_free(buffer);
+    SSH_BUFFER_FREE(buffer);
 
     return str;
 fail:
-    ssh_buffer_free(buffer);
+    SSH_BUFFER_FREE(buffer);
     ssh_string_burn(str);
-    ssh_string_free(str);
+    SSH_STRING_FREE(str);
     ssh_string_burn(e);
-    ssh_string_free(e);
+    SSH_STRING_FREE(e);
     ssh_string_burn(p);
-    ssh_string_free(p);
+    SSH_STRING_FREE(p);
     ssh_string_burn(g);
-    ssh_string_free(g);
+    SSH_STRING_FREE(g);
     ssh_string_burn(q);
-    ssh_string_free(q);
+    SSH_STRING_FREE(q);
     ssh_string_burn(n);
-    ssh_string_free(n);
+    SSH_STRING_FREE(n);
 
     return NULL;
 }
@@ -1358,8 +1431,8 @@ static ssh_string pki_dsa_signature_to_blob(const ssh_signature sig)
            s_len - s_offset_in);
 
     DSA_SIG_free(dsa_sig);
-    ssh_string_free(r);
-    ssh_string_free(s);
+    SSH_STRING_FREE(r);
+    SSH_STRING_FREE(s);
 
     sig_blob = ssh_string_new(40);
     if (sig_blob == NULL) {
@@ -1372,8 +1445,8 @@ static ssh_string pki_dsa_signature_to_blob(const ssh_signature sig)
 
 error:
     DSA_SIG_free(dsa_sig);
-    ssh_string_free(r);
-    ssh_string_free(s);
+    SSH_STRING_FREE(r);
+    SSH_STRING_FREE(s);
     return NULL;
 }
 
@@ -1445,18 +1518,18 @@ static ssh_string pki_ecdsa_signature_to_blob(const ssh_signature sig)
 
     ssh_string_fill(sig_blob, ssh_buffer_get(buf), ssh_buffer_get_len(buf));
 
-    ssh_string_free(r);
-    ssh_string_free(s);
+    SSH_STRING_FREE(r);
+    SSH_STRING_FREE(s);
     ECDSA_SIG_free(ecdsa_sig);
-    ssh_buffer_free(buf);
+    SSH_BUFFER_FREE(buf);
 
     return sig_blob;
 
 error:
-    ssh_string_free(r);
-    ssh_string_free(s);
+    SSH_STRING_FREE(r);
+    SSH_STRING_FREE(s);
     ECDSA_SIG_free(ecdsa_sig);
-    ssh_buffer_free(buf);
+    SSH_BUFFER_FREE(buf);
     return NULL;
 }
 
@@ -1473,7 +1546,7 @@ ssh_string pki_signature_to_blob(const ssh_signature sig)
             sig_blob = ssh_string_copy(sig->raw_sig);
             break;
         case SSH_KEYTYPE_ED25519:
-            sig_blob = pki_ed25519_sig_to_blob(sig);
+            sig_blob = pki_ed25519_signature_to_blob(sig);
             break;
         case SSH_KEYTYPE_ECDSA_P256:
         case SSH_KEYTYPE_ECDSA_P384:
@@ -1519,7 +1592,7 @@ static int pki_signature_from_rsa_blob(const ssh_key pubkey,
 
 #ifdef DEBUG_CRYPTO
     SSH_LOG(SSH_LOG_WARN, "RSA signature len: %lu", (unsigned long)len);
-    ssh_print_hexa("RSA signature", ssh_string_data(sig_blob), len);
+    ssh_log_hexdump("RSA signature", ssh_string_data(sig_blob), len);
 #endif
 
     if (len == rsalen) {
@@ -1541,6 +1614,10 @@ static int pki_signature_from_rsa_blob(const ssh_key pubkey,
         blob_padded_data = (char *) ssh_string_data(sig_blob_padded);
         blob_orig = (char *) ssh_string_data(sig_blob);
 
+        if (blob_padded_data == NULL || blob_orig == NULL) {
+            goto errout;
+        }
+
         /* front-pad the buffer with zeroes */
         explicit_bzero(blob_padded_data, pad_len);
         /* fill the rest with the actual signature blob */
@@ -1583,8 +1660,8 @@ static int pki_signature_from_dsa_blob(UNUSED_PARAM(const ssh_key pubkey),
     }
 
 #ifdef DEBUG_CRYPTO
-    ssh_print_hexa("r", ssh_string_data(sig_blob), 20);
-    ssh_print_hexa("s", (unsigned char *)ssh_string_data(sig_blob) + 20, 20);
+    ssh_log_hexdump("r", ssh_string_data(sig_blob), 20);
+    ssh_log_hexdump("s", (unsigned char *)ssh_string_data(sig_blob) + 20, 20);
 #endif
 
     r = ssh_string_new(20);
@@ -1595,7 +1672,7 @@ static int pki_signature_from_dsa_blob(UNUSED_PARAM(const ssh_key pubkey),
 
     pr = ssh_make_string_bn(r);
     ssh_string_burn(r);
-    ssh_string_free(r);
+    SSH_STRING_FREE(r);
     if (pr == NULL) {
         goto error;
     }
@@ -1608,7 +1685,7 @@ static int pki_signature_from_dsa_blob(UNUSED_PARAM(const ssh_key pubkey),
 
     ps = ssh_make_string_bn(s);
     ssh_string_burn(s);
-    ssh_string_free(s);
+    SSH_STRING_FREE(s);
     if (ps == NULL) {
         goto error;
     }
@@ -1695,12 +1772,12 @@ static int pki_signature_from_ecdsa_blob(UNUSED_PARAM(const ssh_key pubkey),
     }
 
 #ifdef DEBUG_CRYPTO
-    ssh_print_hexa("r", ssh_string_data(r), ssh_string_len(r));
+    ssh_log_hexdump("r", ssh_string_data(r), ssh_string_len(r));
 #endif
 
     pr = ssh_make_string_bn(r);
     ssh_string_burn(r);
-    ssh_string_free(r);
+    SSH_STRING_FREE(r);
     if (pr == NULL) {
         goto error;
     }
@@ -1714,7 +1791,7 @@ static int pki_signature_from_ecdsa_blob(UNUSED_PARAM(const ssh_key pubkey),
 
     if (rlen != 0) {
         ssh_string_burn(s);
-        ssh_string_free(s);
+        SSH_STRING_FREE(s);
         SSH_LOG(SSH_LOG_WARN,
                 "Signature has remaining bytes in inner "
                 "sigblob: %lu",
@@ -1723,12 +1800,12 @@ static int pki_signature_from_ecdsa_blob(UNUSED_PARAM(const ssh_key pubkey),
     }
 
 #ifdef DEBUG_CRYPTO
-    ssh_print_hexa("s", ssh_string_data(s), ssh_string_len(s));
+    ssh_log_hexdump("s", ssh_string_data(s), ssh_string_len(s));
 #endif
 
     ps = ssh_make_string_bn(s);
     ssh_string_burn(s);
-    ssh_string_free(s);
+    SSH_STRING_FREE(s);
     if (ps == NULL) {
         goto error;
     }
@@ -1821,7 +1898,7 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
             }
             break;
         case SSH_KEYTYPE_ED25519:
-            rc = pki_ed25519_sig_from_blob(sig, sig_blob);
+            rc = pki_signature_from_ed25519_blob(sig, sig_blob);
             if (rc != SSH_OK){
                 goto error;
             }
@@ -1852,54 +1929,6 @@ error:
     return NULL;
 }
 
-int pki_signature_verify(ssh_session session,
-                         const ssh_signature sig,
-                         const ssh_key key,
-                         const unsigned char *input,
-                         size_t input_len)
-{
-    int rc;
-
-    if (session == NULL || sig == NULL || key == NULL || input == NULL) {
-        SSH_LOG(SSH_LOG_TRACE, "Bad parameter provided to "
-                               "pki_signature_verify()");
-        return SSH_ERROR;
-    }
-
-    if (ssh_key_type_plain(key->type) != sig->type) {
-        SSH_LOG(SSH_LOG_WARN,
-                "Can not verify %s signature with %s key",
-                sig->type_c,
-                key->type_c);
-        return SSH_ERROR;
-    }
-
-    /* Check if public key and hash type are compatible */
-    rc = pki_key_check_hash_compatible(key, sig->hash_type);
-    if (rc != SSH_OK) {
-        return SSH_ERROR;
-    }
-
-    /* For ed25519 keys, verify using the input directly */
-    if (key->type == SSH_KEYTYPE_ED25519 ||
-        key->type == SSH_KEYTYPE_ED25519_CERT01)
-    {
-        rc = pki_ed25519_verify(key, sig, input, input_len);
-    } else {
-        /* For the other key types, calculate the hash and verify the signature */
-        rc = pki_verify_data_signature(sig, key, input, input_len);
-    }
-
-    if (rc != SSH_OK){
-        ssh_set_error(session,
-                      SSH_FATAL,
-                      "Signature verification error");
-        return SSH_ERROR;
-    }
-
-    return SSH_OK;
-}
-
 static const EVP_MD *pki_digest_to_md(enum ssh_digest_e hash_type)
 {
     const EVP_MD *md = NULL;
@@ -1918,6 +1947,8 @@ static const EVP_MD *pki_digest_to_md(enum ssh_digest_e hash_type)
         md = EVP_sha1();
         break;
     case SSH_DIGEST_AUTO:
+        md = NULL;
+        break;
     default:
         SSH_LOG(SSH_LOG_TRACE, "Unknown hash algorithm for type: %d",
                 hash_type);
@@ -1931,12 +1962,6 @@ static EVP_PKEY *pki_key_to_pkey(ssh_key key)
 {
     EVP_PKEY *pkey = NULL;
 
-    pkey = EVP_PKEY_new();
-    if (pkey == NULL) {
-        SSH_LOG(SSH_LOG_TRACE, "Out of memory");
-        return NULL;
-    }
-
     switch(key->type) {
     case SSH_KEYTYPE_DSS:
     case SSH_KEYTYPE_DSS_CERT01:
@@ -1944,6 +1969,12 @@ static EVP_PKEY *pki_key_to_pkey(ssh_key key)
             SSH_LOG(SSH_LOG_TRACE, "NULL key->dsa");
             goto error;
         }
+        pkey = EVP_PKEY_new();
+        if (pkey == NULL) {
+            SSH_LOG(SSH_LOG_TRACE, "Out of memory");
+            return NULL;
+        }
+
         EVP_PKEY_set1_DSA(pkey, key->dsa);
         break;
     case SSH_KEYTYPE_RSA:
@@ -1953,6 +1984,12 @@ static EVP_PKEY *pki_key_to_pkey(ssh_key key)
             SSH_LOG(SSH_LOG_TRACE, "NULL key->rsa");
             goto error;
         }
+        pkey = EVP_PKEY_new();
+        if (pkey == NULL) {
+            SSH_LOG(SSH_LOG_TRACE, "Out of memory");
+            return NULL;
+        }
+
         EVP_PKEY_set1_RSA(pkey, key->rsa);
         break;
     case SSH_KEYTYPE_ECDSA_P256:
@@ -1966,12 +2003,46 @@ static EVP_PKEY *pki_key_to_pkey(ssh_key key)
             SSH_LOG(SSH_LOG_TRACE, "NULL key->ecdsa");
             goto error;
         }
+        pkey = EVP_PKEY_new();
+        if (pkey == NULL) {
+            SSH_LOG(SSH_LOG_TRACE, "Out of memory");
+            return NULL;
+        }
+
         EVP_PKEY_set1_EC_KEY(pkey, key->ecdsa);
         break;
 # endif
     case SSH_KEYTYPE_ED25519:
-        /* Not supported yet. This type requires the use of EVP_DigestSign*()
-         * API and ECX keys. There is no EVP_set1_ECX_KEY() or equivalent yet. */
+    case SSH_KEYTYPE_ED25519_CERT01:
+# if defined(HAVE_OPENSSL_ED25519)
+        if (ssh_key_is_private(key)) {
+            if (key->ed25519_privkey == NULL) {
+                SSH_LOG(SSH_LOG_TRACE, "NULL key->ed25519_privkey");
+                goto error;
+            }
+            /* In OpenSSL, the input is the private key seed only, which means
+             * the first half of the SSH private key (the second half is the
+             * public key). Both keys have the same length (32 bytes) */
+            pkey = EVP_PKEY_new_raw_private_key(EVP_PKEY_ED25519, NULL,
+                    (const uint8_t *)key->ed25519_privkey,
+                    ED25519_KEY_LEN);
+        } else {
+            if (key->ed25519_pubkey == NULL) {
+                SSH_LOG(SSH_LOG_TRACE, "NULL key->ed25519_pubkey");
+                goto error;
+            }
+            pkey = EVP_PKEY_new_raw_public_key(EVP_PKEY_ED25519, NULL,
+                    (const uint8_t *)key->ed25519_pubkey,
+                    ED25519_KEY_LEN);
+        }
+        if (pkey == NULL) {
+            SSH_LOG(SSH_LOG_TRACE,
+                    "Failed to create ed25519 EVP_PKEY: %s",
+                    ERR_error_string(ERR_get_error(), NULL));
+            return NULL;
+        }
+        break;
+#endif
     case SSH_KEYTYPE_UNKNOWN:
     default:
         SSH_LOG(SSH_LOG_TRACE, "Unknown private key algorithm for type: %d",
@@ -2009,7 +2080,7 @@ ssh_signature pki_sign_data(const ssh_key privkey,
     EVP_PKEY *pkey = NULL;
 
     unsigned char *raw_sig_data = NULL;
-    unsigned int raw_sig_len;
+    size_t raw_sig_len;
 
     ssh_signature sig = NULL;
 
@@ -2027,10 +2098,20 @@ ssh_signature pki_sign_data(const ssh_key privkey,
         return NULL;
     }
 
+#ifndef HAVE_OPENSSL_ED25519
+    if (privkey->type == SSH_KEYTYPE_ED25519 ||
+        privkey->type == SSH_KEYTYPE_ED25519_CERT01)
+    {
+        return pki_do_sign_hash(privkey, input, input_len, hash_type);
+    }
+#endif
+
     /* Set hash algorithm to be used */
     md = pki_digest_to_md(hash_type);
     if (md == NULL) {
-        return NULL;
+        if (hash_type != SSH_DIGEST_AUTO) {
+            return NULL;
+        }
     }
 
     /* Setup private key EVP_PKEY */
@@ -2040,7 +2121,7 @@ ssh_signature pki_sign_data(const ssh_key privkey,
     }
 
     /* Allocate buffer for signature */
-    raw_sig_len = EVP_PKEY_size(pkey);
+    raw_sig_len = (size_t)EVP_PKEY_size(pkey);
     raw_sig_data = (unsigned char *)malloc(raw_sig_len);
     if (raw_sig_data == NULL) {
         SSH_LOG(SSH_LOG_TRACE, "Out of memory");
@@ -2055,26 +2136,42 @@ ssh_signature pki_sign_data(const ssh_key privkey,
     }
 
     /* Sign the data */
-    rc = EVP_SignInit_ex(ctx, md, NULL);
-    if (!rc){
-        SSH_LOG(SSH_LOG_TRACE, "EVP_SignInit() failed");
+    rc = EVP_DigestSignInit(ctx, NULL, md, NULL, pkey);
+    if (rc != 1){
+        SSH_LOG(SSH_LOG_TRACE,
+                "EVP_DigestSignInit() failed: %s",
+                ERR_error_string(ERR_get_error(), NULL));
         goto out;
     }
 
-    rc = EVP_SignUpdate(ctx, input, input_len);
-    if (!rc) {
-        SSH_LOG(SSH_LOG_TRACE, "EVP_SignUpdate() failed");
+#ifdef HAVE_OPENSSL_EVP_DIGESTSIGN
+    rc = EVP_DigestSign(ctx, raw_sig_data, &raw_sig_len, input, input_len);
+    if (rc != 1) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "EVP_DigestSign() failed: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        goto out;
+    }
+#else
+    rc = EVP_DigestSignUpdate(ctx, input, input_len);
+    if (rc != 1) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "EVP_DigestSignUpdate() failed: %s",
+                ERR_error_string(ERR_get_error(), NULL));
         goto out;
     }
 
-    rc = EVP_SignFinal(ctx, raw_sig_data, &raw_sig_len, pkey);
-    if (!rc) {
-        SSH_LOG(SSH_LOG_TRACE, "EVP_SignFinal() failed");
+    rc = EVP_DigestSignFinal(ctx, raw_sig_data, &raw_sig_len);
+    if (rc != 1) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "EVP_DigestSignFinal() failed: %s",
+                ERR_error_string(ERR_get_error(), NULL));
         goto out;
     }
+#endif
 
 #ifdef DEBUG_CRYPTO
-        ssh_print_hexa("Generated signature", raw_sig_data, raw_sig_len);
+        ssh_log_hexdump("Generated signature", raw_sig_data, raw_sig_len);
 #endif
 
     /* Allocate and fill output signature */
@@ -2144,7 +2241,11 @@ int pki_verify_data_signature(ssh_signature signature,
     int evp_rc;
 
     if (pubkey == NULL || ssh_key_is_private(pubkey) || input == NULL ||
-        signature == NULL || signature->raw_sig == NULL)
+        signature == NULL || (signature->raw_sig == NULL
+#ifndef HAVE_OPENSSL_ED25519
+        && signature->ed25519_sig == NULL
+#endif
+        ))
     {
         SSH_LOG(SSH_LOG_TRACE, "Bad parameter provided to "
                                "pki_verify_data_signature()");
@@ -2157,6 +2258,14 @@ int pki_verify_data_signature(ssh_signature signature,
         return SSH_ERROR;
     }
 
+#ifndef HAVE_OPENSSL_ED25519
+    if (pubkey->type == SSH_KEYTYPE_ED25519 ||
+        pubkey->type == SSH_KEYTYPE_ED25519_CERT01)
+    {
+        return pki_ed25519_verify(pubkey, signature, input, input_len);
+    }
+#endif
+
     /* Get the signature to be verified */
     raw_sig_data = ssh_string_data(signature->raw_sig);
     raw_sig_len = ssh_string_len(signature->raw_sig);
@@ -2167,7 +2276,9 @@ int pki_verify_data_signature(ssh_signature signature,
     /* Set hash algorithm to be used */
     md = pki_digest_to_md(signature->hash_type);
     if (md == NULL) {
-        return SSH_ERROR;
+        if (signature->hash_type != SSH_DIGEST_AUTO) {
+            return SSH_ERROR;
+        }
     }
 
     /* Setup public key EVP_PKEY */
@@ -2179,33 +2290,42 @@ int pki_verify_data_signature(ssh_signature signature,
     /* Create the context */
     ctx = EVP_MD_CTX_create();
     if (ctx == NULL) {
-        SSH_LOG(SSH_LOG_TRACE, "Out of memory");
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to create EVP_MD_CTX: %s",
+                ERR_error_string(ERR_get_error(), NULL));
         goto out;
     }
 
     /* Verify the signature */
-    evp_rc = EVP_VerifyInit_ex(ctx, md, NULL);
-    if (!evp_rc){
-        SSH_LOG(SSH_LOG_TRACE, "EVP_SignInit() failed");
+    evp_rc = EVP_DigestVerifyInit(ctx, NULL, md, NULL, pkey);
+    if (evp_rc != 1){
+        SSH_LOG(SSH_LOG_TRACE,
+                "EVP_DigestVerifyInit() failed: %s",
+                ERR_error_string(ERR_get_error(), NULL));
         goto out;
     }
 
-    evp_rc = EVP_VerifyUpdate(ctx, input, input_len);
-    if (!evp_rc) {
-        SSH_LOG(SSH_LOG_TRACE, "EVP_SignUpdate() failed");
+#ifdef HAVE_OPENSSL_EVP_DIGESTVERIFY
+    evp_rc = EVP_DigestVerify(ctx, raw_sig_data, raw_sig_len, input, input_len);
+#else
+    evp_rc = EVP_DigestVerifyUpdate(ctx, input, input_len);
+    if (evp_rc != 1) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "EVP_DigestVerifyUpdate() failed: %s",
+                ERR_error_string(ERR_get_error(), NULL));
         goto out;
     }
 
-    evp_rc = EVP_VerifyFinal(ctx, raw_sig_data, raw_sig_len, pkey);
-    if (evp_rc < 0) {
-        SSH_LOG(SSH_LOG_TRACE, "EVP_SignFinal() failed");
-        rc = SSH_ERROR;
-    } else if (evp_rc == 0) {
-        SSH_LOG(SSH_LOG_TRACE, "Signature invalid");
-        rc = SSH_ERROR;
-    } else if (evp_rc == 1) {
+    evp_rc = EVP_DigestVerifyFinal(ctx, raw_sig_data, raw_sig_len);
+#endif
+    if (evp_rc == 1) {
         SSH_LOG(SSH_LOG_TRACE, "Signature valid");
         rc = SSH_OK;
+    } else {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Signature invalid: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        rc = SSH_ERROR;
     }
 
 out:
@@ -2218,6 +2338,92 @@ out:
     return rc;
 }
 
+#ifdef HAVE_OPENSSL_ED25519
+int pki_key_generate_ed25519(ssh_key key)
+{
+    int evp_rc;
+    EVP_PKEY_CTX *pctx = NULL;
+    EVP_PKEY *pkey = NULL;
+    size_t privkey_len = ED25519_KEY_LEN;
+    size_t pubkey_len = ED25519_KEY_LEN;
+
+    if (key == NULL) {
+        return SSH_ERROR;
+    }
+
+    pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_ED25519, NULL);
+    if (pctx == NULL) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to create ed25519 EVP_PKEY_CTX: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        goto error;
+    }
+
+    evp_rc = EVP_PKEY_keygen_init(pctx);
+    if (evp_rc != 1) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to initialize ed25519 key generation: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        goto error;
+    }
+
+    evp_rc = EVP_PKEY_keygen(pctx, &pkey);
+    if (evp_rc != 1) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to generate ed25519 key: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        goto error;
+    }
+
+    key->ed25519_privkey = malloc(ED25519_KEY_LEN);
+    if (key->ed25519_privkey == NULL) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to allocate memory for ed25519 private key");
+        goto error;
+    }
+
+    key->ed25519_pubkey = malloc(ED25519_KEY_LEN);
+    if (key->ed25519_pubkey == NULL) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to allocate memory for ed25519 public key");
+        goto error;
+    }
+
+    evp_rc = EVP_PKEY_get_raw_private_key(pkey, (uint8_t *)key->ed25519_privkey,
+                                          &privkey_len);
+    if (evp_rc != 1) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to get ed25519 raw private key: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        goto error;
+    }
+
+    evp_rc = EVP_PKEY_get_raw_public_key(pkey, (uint8_t *)key->ed25519_pubkey,
+                                         &pubkey_len);
+    if (evp_rc != 1) {
+        SSH_LOG(SSH_LOG_TRACE,
+                "Failed to get ed25519 raw public key: %s",
+                ERR_error_string(ERR_get_error(), NULL));
+        goto error;
+    }
+
+    EVP_PKEY_CTX_free(pctx);
+    EVP_PKEY_free(pkey);
+    return SSH_OK;
+
+error:
+    if (pctx != NULL) {
+        EVP_PKEY_CTX_free(pctx);
+    }
+    if (pkey != NULL) {
+        EVP_PKEY_free(pkey);
+    }
+    SAFE_FREE(key->ed25519_privkey);
+    SAFE_FREE(key->ed25519_pubkey);
+
+    return SSH_ERROR;
+}
+#else
 ssh_signature pki_do_sign_hash(const ssh_key privkey,
                                const unsigned char *hash,
                                size_t hlen,
@@ -2250,4 +2456,6 @@ ssh_signature pki_do_sign_hash(const ssh_key privkey,
 
     return sig;
 }
+#endif /* HAVE_OPENSSL_ED25519 */
+
 #endif /* _PKI_CRYPTO_H */

src/pki_ed25519.c

@@ -56,28 +56,6 @@ error:
     return SSH_ERROR;
 }
 
-int pki_privkey_build_ed25519(ssh_key key,
-                              ssh_string pubkey,
-                              ssh_string privkey)
-{
-    if (ssh_string_len(pubkey) != ED25519_PK_LEN ||
-            ssh_string_len(privkey) != ED25519_SK_LEN) {
-        SSH_LOG(SSH_LOG_WARN, "Invalid ed25519 key len");
-        return SSH_ERROR;
-    }
-    key->ed25519_privkey = malloc(ED25519_SK_LEN);
-    key->ed25519_pubkey = malloc(ED25519_PK_LEN);
-    if (key->ed25519_privkey == NULL || key->ed25519_pubkey == NULL) {
-        return SSH_ERROR;
-    }
-    memcpy(key->ed25519_privkey, ssh_string_data(privkey),
-           ED25519_SK_LEN);
-    memcpy(key->ed25519_pubkey, ssh_string_data(pubkey),
-           ED25519_PK_LEN);
-
-    return SSH_OK;
-}
-
 int pki_ed25519_sign(const ssh_key privkey,
                      ssh_signature sig,
                      const unsigned char *hash,
@@ -170,165 +148,3 @@ error:
     return SSH_ERROR;
 }
 
-/**
- * @internal
- *
- * @brief Compare ed25519 keys if they are equal.
- *
- * @param[in] k1        The first key to compare.
- *
- * @param[in] k2        The second key to compare.
- *
- * @param[in] what      What part or type of the key do you want to compare.
- *
- * @return              0 if equal, 1 if not.
- */
-int pki_ed25519_key_cmp(const ssh_key k1,
-                        const ssh_key k2,
-                        enum ssh_keycmp_e what)
-{
-    int cmp;
-
-    switch(what) {
-    case SSH_KEY_CMP_PRIVATE:
-        if (k1->ed25519_privkey == NULL || k2->ed25519_privkey == NULL) {
-            return 1;
-        }
-        cmp = memcmp(k1->ed25519_privkey, k2->ed25519_privkey, ED25519_SK_LEN);
-        if (cmp != 0) {
-            return 1;
-        }
-        /* FALL THROUGH */
-    case SSH_KEY_CMP_PUBLIC:
-        if (k1->ed25519_pubkey == NULL || k2->ed25519_pubkey == NULL) {
-            return 1;
-        }
-        cmp = memcmp(k1->ed25519_pubkey, k2->ed25519_pubkey, ED25519_PK_LEN);
-        if (cmp != 0) {
-            return 1;
-        }
-    }
-
-    return 0;
-}
-
-/**
- * @internal
- *
- * @brief duplicate an ed25519 key
- *
- * @param[out\ new preinitialized output ssh_ke
- *
- * @param[in] key key to copy
- *
- * @return SSH_ERROR on error, SSH_OK on success
- */
-int pki_ed25519_key_dup(ssh_key new, const ssh_key key)
-{
-    if (key->ed25519_privkey == NULL && key->ed25519_pubkey == NULL) {
-        return SSH_ERROR;
-    }
-
-    if (key->ed25519_privkey != NULL) {
-        new->ed25519_privkey = malloc(ED25519_SK_LEN);
-        if (new->ed25519_privkey == NULL) {
-            return SSH_ERROR;
-        }
-        memcpy(new->ed25519_privkey, key->ed25519_privkey, ED25519_SK_LEN);
-    }
-
-    if (key->ed25519_pubkey != NULL) {
-        new->ed25519_pubkey = malloc(ED25519_PK_LEN);
-        if (new->ed25519_pubkey == NULL) {
-            SAFE_FREE(new->ed25519_privkey);
-            return SSH_ERROR;
-        }
-        memcpy(new->ed25519_pubkey, key->ed25519_pubkey, ED25519_PK_LEN);
-    }
-
-    return SSH_OK;
-}
-
-/**
- * @internal
- *
- * @brief outputs an ed25519 public key in a blob buffer.
- *
- * @param[out] buffer output buffer
- *
- * @param[in] key key to output
- *
- * @return SSH_ERROR on error, SSH_OK on success
- */
-int pki_ed25519_public_key_to_blob(ssh_buffer buffer, ssh_key key)
-{
-    int rc;
-
-    if (key->ed25519_pubkey == NULL){
-        return SSH_ERROR;
-    }
-
-    rc = ssh_buffer_pack(buffer,
-                         "dP",
-                         (uint32_t)ED25519_PK_LEN,
-                         (size_t)ED25519_PK_LEN, key->ed25519_pubkey);
-
-    return rc;
-}
-
-/**
- * @internal
- *
- * @brief output a signature blob from an ed25519 signature
- *
- * @param[in] sig signature to convert
- *
- * @return Signature blob in SSH string, or NULL on error
- */
-ssh_string pki_ed25519_sig_to_blob(ssh_signature sig)
-{
-    ssh_string sig_blob;
-
-    if (sig->ed25519_sig == NULL) {
-        return NULL;
-    }
-
-    sig_blob = ssh_string_new(ED25519_SIG_LEN);
-    if (sig_blob == NULL) {
-        return NULL;
-    }
-    ssh_string_fill(sig_blob, sig->ed25519_sig, ED25519_SIG_LEN);
-
-    return sig_blob;
-}
-
-/**
- * @internal
- *
- * @brief Convert a signature blob in an ed25519 signature.
- *
- * @param[out] sig a preinitialized signature
- *
- * @param[in] sig_blob a signature blob
- *
- * @return SSH_ERROR on error, SSH_OK on success
- */
-int pki_ed25519_sig_from_blob(ssh_signature sig, ssh_string sig_blob)
-{
-    size_t len;
-
-    len = ssh_string_len(sig_blob);
-    if (len != ED25519_SIG_LEN){
-        SSH_LOG(SSH_LOG_WARN, "Invalid ssh-ed25519 signature len: %zu", len);
-        return SSH_ERROR;
-    }
-
-    sig->ed25519_sig = malloc(ED25519_SIG_LEN);
-    if (sig->ed25519_sig == NULL){
-        return SSH_ERROR;
-    }
-
-    memcpy(sig->ed25519_sig, ssh_string_data(sig_blob), ED25519_SIG_LEN);
-
-    return SSH_OK;
-}

src/pki_ed25519_common.c

@@ -0,0 +1,280 @@
+/*
+ * pki_ed25519_common.c - Common ed25519 functions
+ *
+ * This file is part of the SSH Library
+ *
+ * Copyright (c) 2014 by Aris Adamantiadis
+ *
+ * The SSH Library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at your
+ * option) any later version.
+ *
+ * The SSH Library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with the SSH Library; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include "libssh/pki.h"
+#include "libssh/pki_priv.h"
+#include "libssh/buffer.h"
+
+int pki_privkey_build_ed25519(ssh_key key,
+                              ssh_string pubkey,
+                              ssh_string privkey)
+{
+    if (ssh_string_len(pubkey) != ED25519_KEY_LEN ||
+        ssh_string_len(privkey) != (2 * ED25519_KEY_LEN))
+    {
+        SSH_LOG(SSH_LOG_WARN, "Invalid ed25519 key len");
+        return SSH_ERROR;
+    }
+
+#ifdef HAVE_OPENSSL_ED25519
+    /* In OpenSSL implementation, the private key is the original private seed,
+     * without the public key. */
+    key->ed25519_privkey = malloc(ED25519_KEY_LEN);
+#else
+    /* In the internal implementation, the private key is the concatenation of
+     * the private seed with the public key. */
+    key->ed25519_privkey = malloc(2 * ED25519_KEY_LEN);
+#endif
+    if (key->ed25519_privkey == NULL) {
+        goto error;
+    }
+
+    key->ed25519_pubkey = malloc(ED25519_KEY_LEN);
+    if (key->ed25519_pubkey == NULL) {
+        goto error;
+    }
+
+#ifdef HAVE_OPENSSL_ED25519
+    memcpy(key->ed25519_privkey, ssh_string_data(privkey),
+           ED25519_KEY_LEN);
+#else
+    memcpy(key->ed25519_privkey, ssh_string_data(privkey),
+           2 * ED25519_KEY_LEN);
+#endif
+    memcpy(key->ed25519_pubkey, ssh_string_data(pubkey),
+           ED25519_KEY_LEN);
+
+    return SSH_OK;
+
+error:
+    SAFE_FREE(key->ed25519_privkey);
+    SAFE_FREE(key->ed25519_pubkey);
+
+    return SSH_ERROR;
+}
+
+/**
+ * @internal
+ *
+ * @brief Compare ed25519 keys if they are equal.
+ *
+ * @param[in] k1        The first key to compare.
+ *
+ * @param[in] k2        The second key to compare.
+ *
+ * @param[in] what      What part or type of the key do you want to compare.
+ *
+ * @return              0 if equal, 1 if not.
+ */
+int pki_ed25519_key_cmp(const ssh_key k1,
+                        const ssh_key k2,
+                        enum ssh_keycmp_e what)
+{
+    int cmp;
+
+    switch(what) {
+    case SSH_KEY_CMP_PRIVATE:
+        if (k1->ed25519_privkey == NULL || k2->ed25519_privkey == NULL) {
+            return 1;
+        }
+#ifdef HAVE_OPENSSL_ED25519
+        /* In OpenSSL implementation, the private key is the original private
+         * seed, without the public key. */
+        cmp = memcmp(k1->ed25519_privkey, k2->ed25519_privkey, ED25519_KEY_LEN);
+#else
+        /* In the internal implementation, the private key is the concatenation
+         * of the private seed with the public key. */
+        cmp = memcmp(k1->ed25519_privkey, k2->ed25519_privkey,
+                     2 * ED25519_KEY_LEN);
+#endif
+        if (cmp != 0) {
+            return 1;
+        }
+        /* FALL THROUGH */
+    case SSH_KEY_CMP_PUBLIC:
+        if (k1->ed25519_pubkey == NULL || k2->ed25519_pubkey == NULL) {
+            return 1;
+        }
+        cmp = memcmp(k1->ed25519_pubkey, k2->ed25519_pubkey, ED25519_KEY_LEN);
+        if (cmp != 0) {
+            return 1;
+        }
+    }
+
+    return 0;
+}
+
+/**
+ * @internal
+ *
+ * @brief Duplicate an Ed25519 key
+ *
+ * @param[out] new Pre-initialized ssh_key structure
+ *
+ * @param[in] key Key to copy
+ *
+ * @return SSH_ERROR on error, SSH_OK on success
+ */
+int pki_ed25519_key_dup(ssh_key new, const ssh_key key)
+{
+    if (key->ed25519_privkey == NULL && key->ed25519_pubkey == NULL) {
+        return SSH_ERROR;
+    }
+
+    if (key->ed25519_privkey != NULL) {
+#ifdef HAVE_OPENSSL_ED25519
+        /* In OpenSSL implementation, the private key is the original private
+         * seed, without the public key. */
+        new->ed25519_privkey = malloc(ED25519_KEY_LEN);
+#else
+        /* In the internal implementation, the private key is the concatenation
+         * of the private seed with the public key. */
+        new->ed25519_privkey = malloc(2 * ED25519_KEY_LEN);
+#endif
+        if (new->ed25519_privkey == NULL) {
+            return SSH_ERROR;
+        }
+#ifdef HAVE_OPENSSL_ED25519
+        memcpy(new->ed25519_privkey, key->ed25519_privkey, ED25519_KEY_LEN);
+#else
+        memcpy(new->ed25519_privkey, key->ed25519_privkey, 2 * ED25519_KEY_LEN);
+#endif
+    }
+
+    if (key->ed25519_pubkey != NULL) {
+        new->ed25519_pubkey = malloc(ED25519_KEY_LEN);
+        if (new->ed25519_pubkey == NULL) {
+            SAFE_FREE(new->ed25519_privkey);
+            return SSH_ERROR;
+        }
+        memcpy(new->ed25519_pubkey, key->ed25519_pubkey, ED25519_KEY_LEN);
+    }
+
+    return SSH_OK;
+}
+
+/**
+ * @internal
+ *
+ * @brief Outputs an Ed25519 public key in a blob buffer.
+ *
+ * @param[out] buffer Output buffer
+ *
+ * @param[in] key Key to output
+ *
+ * @return SSH_ERROR on error, SSH_OK on success
+ */
+int pki_ed25519_public_key_to_blob(ssh_buffer buffer, ssh_key key)
+{
+    int rc;
+
+    if (key->ed25519_pubkey == NULL){
+        return SSH_ERROR;
+    }
+
+    rc = ssh_buffer_pack(buffer,
+                         "dP",
+                         (uint32_t)ED25519_KEY_LEN,
+                         (size_t)ED25519_KEY_LEN, key->ed25519_pubkey);
+
+    return rc;
+}
+
+/**
+ * @internal
+ *
+ * @brief output a signature blob from an ed25519 signature
+ *
+ * @param[in] sig signature to convert
+ *
+ * @return Signature blob in SSH string, or NULL on error
+ */
+ssh_string pki_ed25519_signature_to_blob(ssh_signature sig)
+{
+    ssh_string sig_blob;
+
+#ifdef HAVE_OPENSSL_ED25519
+    /* When using the OpenSSL implementation, the signature is stored in raw_sig
+     * which is shared by all algorithms.*/
+    if (sig->raw_sig == NULL) {
+        return NULL;
+    }
+#else
+    /* When using the internal implementation, the signature is stored in an
+     * algorithm specific field. */
+    if (sig->ed25519_sig == NULL) {
+        return NULL;
+    }
+#endif
+
+    sig_blob = ssh_string_new(ED25519_SIG_LEN);
+    if (sig_blob == NULL) {
+        return NULL;
+    }
+
+#ifdef HAVE_OPENSSL_ED25519
+    ssh_string_fill(sig_blob, ssh_string_data(sig->raw_sig),
+                    ssh_string_len(sig->raw_sig));
+#else
+    ssh_string_fill(sig_blob, sig->ed25519_sig, ED25519_SIG_LEN);
+#endif
+
+    return sig_blob;
+}
+
+/**
+ * @internal
+ *
+ * @brief Convert a signature blob in an ed25519 signature.
+ *
+ * @param[out] sig a preinitialized signature
+ *
+ * @param[in] sig_blob a signature blob
+ *
+ * @return SSH_ERROR on error, SSH_OK on success
+ */
+int pki_signature_from_ed25519_blob(ssh_signature sig, ssh_string sig_blob)
+{
+    size_t len;
+
+    len = ssh_string_len(sig_blob);
+    if (len != ED25519_SIG_LEN){
+        SSH_LOG(SSH_LOG_WARN, "Invalid ssh-ed25519 signature len: %zu", len);
+        return SSH_ERROR;
+    }
+
+#ifdef HAVE_OPENSSL_ED25519
+    sig->raw_sig = ssh_string_copy(sig_blob);
+#else
+    sig->ed25519_sig = malloc(ED25519_SIG_LEN);
+    if (sig->ed25519_sig == NULL){
+        return SSH_ERROR;
+    }
+    memcpy(sig->ed25519_sig, ssh_string_data(sig_blob), ED25519_SIG_LEN);
+#endif
+
+    return SSH_OK;
+}
+

src/pki_gcrypt.c

@@ -139,7 +139,7 @@ static ssh_string asn1_get(ssh_buffer buffer, unsigned char want) {
   }
 
   if (ssh_buffer_get_data(buffer, ssh_string_data(str), size) == 0) {
-    ssh_string_free(str);
+    SSH_STRING_FREE(str);
     return NULL;
   }
 
@@ -177,14 +177,14 @@ static ssh_string asn1_get_bit_string(ssh_buffer buffer)
 
     len = ssh_buffer_get_data(buffer, &unused, 1);
     if (len == 0) {
-        ssh_string_free(str);
+        SSH_STRING_FREE(str);
         return NULL;
     }
 
     if (unused == 0) {
         len = ssh_buffer_get_data(buffer, ssh_string_data(str), size);
         if (len == 0) {
-            ssh_string_free(str);
+            SSH_STRING_FREE(str);
             return NULL;
         }
         return str;
@@ -197,7 +197,7 @@ static ssh_string asn1_get_bit_string(ssh_buffer buffer)
 
         len = ssh_buffer_get_data(buffer, &c, 1);
         if (len == 0) {
-            ssh_string_free(str);
+            SSH_STRING_FREE(str);
             return NULL;
         }
         *p = last | (c >> unused);
@@ -434,7 +434,7 @@ static ssh_buffer privatekey_string_to_buffer(const char *pkey, int type,
             header_end = ECDSA_HEADER_END;
             break;
         default:
-            ssh_buffer_free(buffer);
+            SSH_BUFFER_FREE(buffer);
             return NULL;
     }
 
@@ -450,14 +450,14 @@ static ssh_buffer privatekey_string_to_buffer(const char *pkey, int type,
         get_next_line(p, len);
     }
     if (eol) {
-        ssh_buffer_free(buffer);
+        SSH_BUFFER_FREE(buffer);
         return NULL;
     }
 
     /* skip header line */
     get_next_line(p, len);
     if (eol) {
-        ssh_buffer_free(buffer);
+        SSH_BUFFER_FREE(buffer);
         return NULL;
     }
 
@@ -465,7 +465,7 @@ static ssh_buffer privatekey_string_to_buffer(const char *pkey, int type,
         /* skip line */
         get_next_line(p, len);
         if (eol) {
-            ssh_buffer_free(buffer);
+            SSH_BUFFER_FREE(buffer);
             return NULL;
         }
 
@@ -474,24 +474,24 @@ static ssh_buffer privatekey_string_to_buffer(const char *pkey, int type,
             len = 0;
             get_next_line(p, len);
             if (eol) {
-                ssh_buffer_free(buffer);
+                SSH_BUFFER_FREE(buffer);
                 return NULL;
             }
             if (privatekey_dek_header(p, len, &algo, &mode, &key_len,
                         &iv, &iv_len) < 0) {
-                ssh_buffer_free(buffer);
+                SSH_BUFFER_FREE(buffer);
                 SAFE_FREE(iv);
                 return NULL;
             }
         } else {
-            ssh_buffer_free(buffer);
+            SSH_BUFFER_FREE(buffer);
             SAFE_FREE(iv);
             return NULL;
         }
     } else {
         if(len > 0) {
             if (ssh_buffer_add_data(buffer, p, len) < 0) {
-                ssh_buffer_free(buffer);
+                SSH_BUFFER_FREE(buffer);
                 SAFE_FREE(iv);
                 return NULL;
             }
@@ -501,7 +501,7 @@ static ssh_buffer privatekey_string_to_buffer(const char *pkey, int type,
     get_next_line(p, len);
     while(!eol && strncmp(p, header_end, header_end_size) != 0) {
         if (ssh_buffer_add_data(buffer, p, len) < 0) {
-            ssh_buffer_free(buffer);
+            SSH_BUFFER_FREE(buffer);
             SAFE_FREE(iv);
             return NULL;
         }
@@ -509,19 +509,19 @@ static ssh_buffer privatekey_string_to_buffer(const char *pkey, int type,
     }
 
     if (eol || strncmp(p, header_end, header_end_size) != 0) {
-        ssh_buffer_free(buffer);
+        SSH_BUFFER_FREE(buffer);
         SAFE_FREE(iv);
         return NULL;
     }
 
     if (ssh_buffer_add_data(buffer, "\0", 1) < 0) {
-        ssh_buffer_free(buffer);
+        SSH_BUFFER_FREE(buffer);
         SAFE_FREE(iv);
         return NULL;
     }
 
     out = base64_to_bin(ssh_buffer_get(buffer));
-    ssh_buffer_free(buffer);
+    SSH_BUFFER_FREE(buffer);
     if (out == NULL) {
         SAFE_FREE(iv);
         return NULL;
@@ -530,7 +530,7 @@ static ssh_buffer privatekey_string_to_buffer(const char *pkey, int type,
     if (algo) {
         if (privatekey_decrypt(algo, mode, key_len, iv, iv_len, out,
                     cb, userdata, desc) < 0) {
-            ssh_buffer_free(out);
+            SSH_BUFFER_FREE(out);
             SAFE_FREE(iv);
             return NULL;
         }
@@ -561,20 +561,20 @@ static int b64decode_rsa_privatekey(const char *pkey, gcry_sexp_t *r,
   }
 
   if (!asn1_check_sequence(buffer)) {
-    ssh_buffer_free(buffer);
+    SSH_BUFFER_FREE(buffer);
     return 0;
   }
 
   v = asn1_get_int(buffer);
   if (v == NULL) {
-    ssh_buffer_free(buffer);
+    SSH_BUFFER_FREE(buffer);
     return 0;
   }
 
   data = ssh_string_data(v);
   if (ssh_string_len(v) != 1 || data[0] != 0) {
-    ssh_string_free(v);
-    ssh_buffer_free(buffer);
+    SSH_STRING_FREE(v);
+    SSH_BUFFER_FREE(buffer);
     return 0;
   }
 
@@ -587,7 +587,7 @@ static int b64decode_rsa_privatekey(const char *pkey, gcry_sexp_t *r,
   unused2 = asn1_get_int(buffer);
   u = asn1_get_int(buffer);
 
-  ssh_buffer_free(buffer);
+  SSH_BUFFER_FREE(buffer);
 
   if (n == NULL || e == NULL || d == NULL || p == NULL || q == NULL ||
       unused1 == NULL || unused2 == NULL|| u == NULL) {
@@ -608,20 +608,20 @@ static int b64decode_rsa_privatekey(const char *pkey, gcry_sexp_t *r,
 
 error:
   ssh_string_burn(n);
-  ssh_string_free(n);
+  SSH_STRING_FREE(n);
   ssh_string_burn(e);
-  ssh_string_free(e);
+  SSH_STRING_FREE(e);
   ssh_string_burn(d);
-  ssh_string_free(d);
+  SSH_STRING_FREE(d);
   ssh_string_burn(p);
-  ssh_string_free(p);
+  SSH_STRING_FREE(p);
   ssh_string_burn(q);
-  ssh_string_free(q);
-  ssh_string_free(unused1);
-  ssh_string_free(unused2);
+  SSH_STRING_FREE(q);
+  SSH_STRING_FREE(unused1);
+  SSH_STRING_FREE(unused2);
   ssh_string_burn(u);
-  ssh_string_free(u);
-  ssh_string_free(v);
+  SSH_STRING_FREE(u);
+  SSH_STRING_FREE(v);
 
   return rc;
 }
@@ -644,20 +644,20 @@ static int b64decode_dsa_privatekey(const char *pkey, gcry_sexp_t *r, ssh_auth_c
   }
 
   if (!asn1_check_sequence(buffer)) {
-    ssh_buffer_free(buffer);
+    SSH_BUFFER_FREE(buffer);
     return 0;
   }
 
   v = asn1_get_int(buffer);
   if (v == NULL) {
-    ssh_buffer_free(buffer);
+    SSH_BUFFER_FREE(buffer);
     return 0;
   }
 
   data = ssh_string_data(v);
   if (ssh_string_len(v) != 1 || data[0] != 0) {
-    ssh_string_free(v);
-    ssh_buffer_free(buffer);
+    SSH_STRING_FREE(v);
+    SSH_BUFFER_FREE(buffer);
     return 0;
   }
 
@@ -666,7 +666,7 @@ static int b64decode_dsa_privatekey(const char *pkey, gcry_sexp_t *r, ssh_auth_c
   g = asn1_get_int(buffer);
   y = asn1_get_int(buffer);
   x = asn1_get_int(buffer);
-  ssh_buffer_free(buffer);
+  SSH_BUFFER_FREE(buffer);
 
   if (p == NULL || q == NULL || g == NULL || y == NULL || x == NULL) {
     rc = 0;
@@ -685,16 +685,16 @@ static int b64decode_dsa_privatekey(const char *pkey, gcry_sexp_t *r, ssh_auth_c
 
 error:
   ssh_string_burn(p);
-  ssh_string_free(p);
+  SSH_STRING_FREE(p);
   ssh_string_burn(q);
-  ssh_string_free(q);
+  SSH_STRING_FREE(q);
   ssh_string_burn(g);
-  ssh_string_free(g);
+  SSH_STRING_FREE(g);
   ssh_string_burn(y);
-  ssh_string_free(y);
+  SSH_STRING_FREE(y);
   ssh_string_burn(x);
-  ssh_string_free(x);
-  ssh_string_free(v);
+  SSH_STRING_FREE(x);
+  SSH_STRING_FREE(v);
 
   return rc;
 }
@@ -916,13 +916,13 @@ static int b64decode_ecdsa_privatekey(const char *pkey, gcry_sexp_t *r,
     }
 
  error:
-    ssh_buffer_free(buffer);
-    ssh_string_free(v);
+    SSH_BUFFER_FREE(buffer);
+    SSH_STRING_FREE(v);
     ssh_string_burn(d);
-    ssh_string_free(d);
-    ssh_string_free(oi);
+    SSH_STRING_FREE(d);
+    SSH_STRING_FREE(oi);
     ssh_string_burn(q);
-    ssh_string_free(q);
+    SSH_STRING_FREE(q);
 
     return valid;
 }
@@ -1560,7 +1560,7 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
     if (key->cert != NULL) {
         rc = ssh_buffer_add_buffer(buffer, key->cert);
         if (rc < 0) {
-            ssh_buffer_free(buffer);
+            SSH_BUFFER_FREE(buffer);
             return NULL;
         }
         goto makestring;
@@ -1568,14 +1568,14 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
 
     type_s = ssh_string_from_char(key->type_c);
     if (type_s == NULL) {
-        ssh_buffer_free(buffer);
+        SSH_BUFFER_FREE(buffer);
         return NULL;
     }
 
     rc = ssh_buffer_add_ssh_string(buffer, type_s);
-    ssh_string_free(type_s);
+    SSH_STRING_FREE(type_s);
     if (rc < 0) {
-        ssh_buffer_free(buffer);
+        SSH_BUFFER_FREE(buffer);
         return NULL;
     }
 
@@ -1631,13 +1631,13 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
             }
 
             ssh_string_burn(p);
-            ssh_string_free(p);
+            SSH_STRING_FREE(p);
             ssh_string_burn(g);
-            ssh_string_free(g);
+            SSH_STRING_FREE(g);
             ssh_string_burn(q);
-            ssh_string_free(q);
+            SSH_STRING_FREE(q);
             ssh_string_burn(n);
-            ssh_string_free(n);
+            SSH_STRING_FREE(n);
 
             break;
         case SSH_KEYTYPE_RSA:
@@ -1667,9 +1667,9 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
             }
 
             ssh_string_burn(e);
-            ssh_string_free(e);
+            SSH_STRING_FREE(e);
             ssh_string_burn(n);
-            ssh_string_free(n);
+            SSH_STRING_FREE(n);
 
             break;
         case SSH_KEYTYPE_ED25519:
@@ -1685,21 +1685,21 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
             type_s = ssh_string_from_char(
                        pki_key_ecdsa_nid_to_char(key->ecdsa_nid));
             if (type_s == NULL) {
-                ssh_buffer_free(buffer);
+                SSH_BUFFER_FREE(buffer);
                 return NULL;
             }
 
             rc = ssh_buffer_add_ssh_string(buffer, type_s);
-            ssh_string_free(type_s);
+            SSH_STRING_FREE(type_s);
             if (rc < 0) {
-                ssh_buffer_free(buffer);
+                SSH_BUFFER_FREE(buffer);
                 return NULL;
             }
 
             e = ssh_sexp_extract_mpi(key->ecdsa, "q", GCRYMPI_FMT_STD,
                                      GCRYMPI_FMT_STD);
             if (e == NULL) {
-                ssh_buffer_free(buffer);
+                SSH_BUFFER_FREE(buffer);
                 return NULL;
             }
 
@@ -1709,7 +1709,7 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
             }
 
             ssh_string_burn(e);
-            ssh_string_free(e);
+            SSH_STRING_FREE(e);
             e = NULL;
             break;
 #endif
@@ -1729,23 +1729,23 @@ makestring:
     if (rc < 0) {
         goto fail;
     }
-    ssh_buffer_free(buffer);
+    SSH_BUFFER_FREE(buffer);
 
     return str;
 fail:
-    ssh_buffer_free(buffer);
+    SSH_BUFFER_FREE(buffer);
     ssh_string_burn(str);
-    ssh_string_free(str);
+    SSH_STRING_FREE(str);
     ssh_string_burn(e);
-    ssh_string_free(e);
+    SSH_STRING_FREE(e);
     ssh_string_burn(p);
-    ssh_string_free(p);
+    SSH_STRING_FREE(p);
     ssh_string_burn(g);
-    ssh_string_free(g);
+    SSH_STRING_FREE(g);
     ssh_string_burn(q);
-    ssh_string_free(q);
+    SSH_STRING_FREE(q);
     ssh_string_burn(n);
-    ssh_string_free(n);
+    SSH_STRING_FREE(n);
 
     return NULL;
 }
@@ -1832,7 +1832,7 @@ ssh_string pki_signature_to_blob(const ssh_signature sig)
             gcry_sexp_release(sexp);
             break;
         case SSH_KEYTYPE_ED25519:
-		sig_blob = pki_ed25519_sig_to_blob(sig);
+		sig_blob = pki_ed25519_signature_to_blob(sig);
 		break;
         case SSH_KEYTYPE_ECDSA_P256:
         case SSH_KEYTYPE_ECDSA_P384:
@@ -1852,40 +1852,40 @@ ssh_string pki_signature_to_blob(const ssh_signature sig)
                 R = ssh_sexp_extract_mpi(sig->ecdsa_sig, "r",
                                          GCRYMPI_FMT_USG, GCRYMPI_FMT_STD);
                 if (R == NULL) {
-                    ssh_buffer_free(b);
+                    SSH_BUFFER_FREE(b);
                     return NULL;
                 }
 
                 rc = ssh_buffer_add_ssh_string(b, R);
-                ssh_string_free(R);
+                SSH_STRING_FREE(R);
                 if (rc < 0) {
-                    ssh_buffer_free(b);
+                    SSH_BUFFER_FREE(b);
                     return NULL;
                 }
 
                 S = ssh_sexp_extract_mpi(sig->ecdsa_sig, "s",
                                          GCRYMPI_FMT_USG, GCRYMPI_FMT_STD);
                 if (S == NULL) {
-                    ssh_buffer_free(b);
+                    SSH_BUFFER_FREE(b);
                     return NULL;
                 }
 
                 rc = ssh_buffer_add_ssh_string(b, S);
-                ssh_string_free(S);
+                SSH_STRING_FREE(S);
                 if (rc < 0) {
-                    ssh_buffer_free(b);
+                    SSH_BUFFER_FREE(b);
                     return NULL;
                 }
 
                 sig_blob = ssh_string_new(ssh_buffer_get_len(b));
                 if (sig_blob == NULL) {
-                    ssh_buffer_free(b);
+                    SSH_BUFFER_FREE(b);
                     return NULL;
                 }
 
                 ssh_string_fill(sig_blob,
                                 ssh_buffer_get(b), ssh_buffer_get_len(b));
-                ssh_buffer_free(b);
+                SSH_BUFFER_FREE(b);
                 break;
             }
 #endif
@@ -1945,7 +1945,7 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
             SSH_LOG(SSH_LOG_DEBUG,
                     "DSA signature len: %lu",
                     (unsigned long)len);
-            ssh_print_hexa("DSA signature", ssh_string_data(sig_blob), len);
+            ssh_log_hexdump("DSA signature", ssh_string_data(sig_blob), len);
 #endif
 
             err = gcry_sexp_build(&sig->dsa_sig,
@@ -1980,7 +1980,7 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
 
 #ifdef DEBUG_CRYPTO
             SSH_LOG(SSH_LOG_DEBUG, "RSA signature len: %lu", (unsigned long)len);
-            ssh_print_hexa("RSA signature", ssh_string_data(sig_blob), len);
+            ssh_log_hexdump("RSA signature", ssh_string_data(sig_blob), len);
 #endif
 
             err = gcry_sexp_build(&sig->rsa_sig,
@@ -1994,7 +1994,7 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
             }
             break;
         case SSH_KEYTYPE_ED25519:
-		rc = pki_ed25519_sig_from_blob(sig, sig_blob);
+		rc = pki_signature_from_ed25519_blob(sig, sig_blob);
 		if (rc != SSH_OK){
 			ssh_signature_free(sig);
 			return NULL;
@@ -2019,24 +2019,24 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
                                          ssh_string_data(sig_blob),
                                          ssh_string_len(sig_blob));
                 if (rc < 0) {
-                    ssh_buffer_free(b);
+                    SSH_BUFFER_FREE(b);
                     ssh_signature_free(sig);
                     return NULL;
                 }
 
                 r = ssh_buffer_get_ssh_string(b);
                 if (r == NULL) {
-                    ssh_buffer_free(b);
+                    SSH_BUFFER_FREE(b);
                     ssh_signature_free(sig);
                     return NULL;
                 }
 
                 s = ssh_buffer_get_ssh_string(b);
                 rlen = ssh_buffer_get_len(b);
-                ssh_buffer_free(b);
+                SSH_BUFFER_FREE(b);
                 if (s == NULL) {
                     ssh_string_burn(r);
-                    ssh_string_free(r);
+                    SSH_STRING_FREE(r);
                     ssh_signature_free(sig);
                     return NULL;
                 }
@@ -2047,16 +2047,16 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
                             "sigblob: %lu",
                             (unsigned long)rlen);
                     ssh_string_burn(r);
-                    ssh_string_free(r);
+                    SSH_STRING_FREE(r);
                     ssh_string_burn(s);
-                    ssh_string_free(s);
+                    SSH_STRING_FREE(s);
                     ssh_signature_free(sig);
                     return NULL;
                 }
 
 #ifdef DEBUG_CRYPTO
-                ssh_print_hexa("r", ssh_string_data(r), ssh_string_len(r));
-                ssh_print_hexa("s", ssh_string_data(s), ssh_string_len(s));
+                ssh_log_hexdump("r", ssh_string_data(r), ssh_string_len(r));
+                ssh_log_hexdump("s", ssh_string_data(s), ssh_string_len(s));
 #endif
 
                 err = gcry_sexp_build(&sig->ecdsa_sig,
@@ -2067,9 +2067,9 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
                                       ssh_string_len(s),
                                       ssh_string_data(s));
                 ssh_string_burn(r);
-                ssh_string_free(r);
+                SSH_STRING_FREE(r);
                 ssh_string_burn(s);
-                ssh_string_free(s);
+                SSH_STRING_FREE(s);
                 if (err) {
                     ssh_signature_free(sig);
                     return NULL;
@@ -2087,54 +2087,6 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
     return sig;
 }
 
-int pki_signature_verify(ssh_session session,
-                         const ssh_signature sig,
-                         const ssh_key key,
-                         const unsigned char *input,
-                         size_t input_len)
-{
-    int rc;
-
-    if (session == NULL || sig == NULL || key == NULL || input == NULL) {
-        SSH_LOG(SSH_LOG_TRACE, "Bad parameter provided to "
-                               "pki_signature_verify()");
-        return SSH_ERROR;
-    }
-
-    if (ssh_key_type_plain(key->type) != sig->type) {
-        SSH_LOG(SSH_LOG_WARN,
-                "Can not verify %s signature with %s key",
-                sig->type_c,
-                key->type_c);
-        return SSH_ERROR;
-    }
-
-    /* Check if public key and hash type are compatible */
-    rc = pki_key_check_hash_compatible(key, sig->hash_type);
-    if (rc != SSH_OK) {
-        return SSH_ERROR;
-    }
-
-    /* For ed25519 keys, verify using the input directly */
-    if (key->type == SSH_KEYTYPE_ED25519 ||
-        key->type == SSH_KEYTYPE_ED25519_CERT01)
-    {
-        rc = pki_ed25519_verify(key, sig, input, input_len);
-    } else {
-        /* For the other key types, calculate the hash and verify the signature */
-        rc = pki_verify_data_signature(sig, key, input, input_len);
-    }
-
-    if (rc != SSH_OK){
-        ssh_set_error(session,
-                      SSH_FATAL,
-                      "Signature verification error");
-        return SSH_ERROR;
-    }
-
-    return SSH_OK;
-}
-
 ssh_signature pki_do_sign_hash(const ssh_key privkey,
                                const unsigned char *hash,
                                size_t hlen,
@@ -2268,6 +2220,7 @@ ssh_signature pki_sign_data(const ssh_key privkey,
                             size_t input_len)
 {
     unsigned char hash[SHA512_DIGEST_LEN] = {0};
+    const unsigned char *sign_input = NULL;
     uint32_t hlen = 0;
     int rc;
 
@@ -2287,27 +2240,38 @@ ssh_signature pki_sign_data(const ssh_key privkey,
     case SSH_DIGEST_SHA256:
         sha256(input, input_len, hash);
         hlen = SHA256_DIGEST_LEN;
+        sign_input = hash;
         break;
     case SSH_DIGEST_SHA384:
         sha384(input, input_len, hash);
         hlen = SHA384_DIGEST_LEN;
+        sign_input = hash;
         break;
     case SSH_DIGEST_SHA512:
         sha512(input, input_len, hash);
         hlen = SHA512_DIGEST_LEN;
+        sign_input = hash;
         break;
     case SSH_DIGEST_SHA1:
         sha1(input, input_len, hash);
         hlen = SHA_DIGEST_LEN;
+        sign_input = hash;
         break;
     case SSH_DIGEST_AUTO:
+        if (privkey->type == SSH_KEYTYPE_ED25519) {
+            /* SSH_DIGEST_AUTO should only be used with ed25519 */
+            sign_input = input;
+            hlen = input_len;
+            break;
+        }
+        FALL_THROUGH;
     default:
         SSH_LOG(SSH_LOG_TRACE, "Unknown hash algorithm for type: %d",
                 hash_type);
         return NULL;
     }
 
-    return pki_do_sign_hash(privkey, hash, hlen, hash_type);
+    return pki_do_sign_hash(privkey, sign_input, hlen, hash_type);
 }
 
 /**
@@ -2336,6 +2300,8 @@ int pki_verify_data_signature(ssh_signature signature,
     unsigned char *hash = ghash + 1;
     uint32_t hlen = 0;
 
+    const unsigned char *verify_input = NULL;
+
     int rc;
 
     if (pubkey == NULL || ssh_key_is_private(pubkey) || input == NULL ||
@@ -2357,23 +2323,35 @@ int pki_verify_data_signature(ssh_signature signature,
         sha256(input, input_len, hash);
         hlen = SHA256_DIGEST_LEN;
         hash_type = "sha256";
+        verify_input = hash;
         break;
     case SSH_DIGEST_SHA384:
         sha384(input, input_len, hash);
         hlen = SHA384_DIGEST_LEN;
         hash_type = "sha384";
+        verify_input = hash;
         break;
     case SSH_DIGEST_SHA512:
         sha512(input, input_len, hash);
         hlen = SHA512_DIGEST_LEN;
         hash_type = "sha512";
+        verify_input = hash;
         break;
     case SSH_DIGEST_SHA1:
         sha1(input, input_len, hash);
         hlen = SHA_DIGEST_LEN;
         hash_type = "sha1";
+        verify_input = hash;
         break;
     case SSH_DIGEST_AUTO:
+        if (pubkey->type == SSH_KEYTYPE_ED25519 ||
+            pubkey->type == SSH_KEYTYPE_ED25519_CERT01)
+        {
+            verify_input = input;
+            hlen = input_len;
+            break;
+        }
+        FALL_THROUGH;
     default:
         SSH_LOG(SSH_LOG_TRACE, "Unknown sig->hash_type: %d", signature->hash_type);
         return SSH_ERROR;
@@ -2461,6 +2439,14 @@ int pki_verify_data_signature(ssh_signature signature,
             }
             break;
 #endif
+        case SSH_KEYTYPE_ED25519:
+        case SSH_KEYTYPE_ED25519_CERT01:
+            rc = pki_ed25519_verify(pubkey, signature, verify_input, hlen);
+            if (rc != SSH_OK) {
+                SSH_LOG(SSH_LOG_TRACE, "ED25519 error: Signature invalid");
+                return SSH_ERROR;
+            }
+            break;
         case SSH_KEYTYPE_RSA1:
         case SSH_KEYTYPE_UNKNOWN:
         default:

src/pki_mbedcrypto.c

@@ -32,6 +32,7 @@
 #include "libssh/pki_priv.h"
 #include "libssh/buffer.h"
 #include "libssh/bignum.h"
+#include "libssh/misc.h"
 
 #define MAX_PASSPHRASE_SIZE 1024
 #define MAX_KEY_SIZE 32
@@ -595,7 +596,7 @@ ssh_string make_ecpoint_string(const mbedtls_ecp_group *g, const
     rc = mbedtls_ecp_point_write_binary(g, p, MBEDTLS_ECP_PF_UNCOMPRESSED,
                 &len, ssh_string_data(s), ssh_string_len(s));
     if (rc == MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL) {
-        ssh_string_free(s);
+        SSH_STRING_FREE(s);
 
         s = ssh_string_new(len);
         if (s == NULL) {
@@ -607,12 +608,12 @@ ssh_string make_ecpoint_string(const mbedtls_ecp_group *g, const
     }
 
     if (rc != 0) {
-        ssh_string_free(s);
+        SSH_STRING_FREE(s);
         return NULL;
     }
 
     if (len != ssh_string_len(s)) {
-        ssh_string_free(s);
+        SSH_STRING_FREE(s);
         return NULL;
     }
 
@@ -652,7 +653,7 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
     if (key->cert != NULL) {
         rc = ssh_buffer_add_buffer(buffer, key->cert);
         if (rc < 0) {
-            ssh_buffer_free(buffer);
+            SSH_BUFFER_FREE(buffer);
             return NULL;
         }
 
@@ -661,14 +662,14 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
 
     type_s = ssh_string_from_char(key->type_c);
     if (type_s == NULL) {
-        ssh_buffer_free(buffer);
+        SSH_BUFFER_FREE(buffer);
         return NULL;
     }
 
     rc = ssh_buffer_add_ssh_string(buffer, type_s);
-    ssh_string_free(type_s);
+    SSH_STRING_FREE(type_s);
     if (rc < 0) {
-        ssh_buffer_free(buffer);
+        SSH_BUFFER_FREE(buffer);
         return NULL;
     }
 
@@ -676,7 +677,7 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
         case SSH_KEYTYPE_RSA: {
             mbedtls_rsa_context *rsa;
             if (mbedtls_pk_can_do(key->rsa, MBEDTLS_PK_RSA) == 0) {
-                ssh_buffer_free(buffer);
+                SSH_BUFFER_FREE(buffer);
                 return NULL;
             }
 
@@ -701,10 +702,10 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
             }
 
             ssh_string_burn(e);
-            ssh_string_free(e);
+            SSH_STRING_FREE(e);
             e = NULL;
             ssh_string_burn(n);
-            ssh_string_free(n);
+            SSH_STRING_FREE(n);
             n = NULL;
 
             break;
@@ -715,21 +716,21 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
             type_s =
                 ssh_string_from_char(pki_key_ecdsa_nid_to_char(key->ecdsa_nid));
             if (type_s == NULL) {
-                ssh_buffer_free(buffer);
+                SSH_BUFFER_FREE(buffer);
                 return NULL;
             }
 
             rc = ssh_buffer_add_ssh_string(buffer, type_s);
-            ssh_string_free(type_s);
+            SSH_STRING_FREE(type_s);
             if (rc < 0) {
-                ssh_buffer_free(buffer);
+                SSH_BUFFER_FREE(buffer);
                 return NULL;
             }
 
             e = make_ecpoint_string(&key->ecdsa->grp, &key->ecdsa->Q);
 
             if (e == NULL) {
-                ssh_buffer_free(buffer);
+                SSH_BUFFER_FREE(buffer);
                 return NULL;
             }
 
@@ -739,7 +740,7 @@ ssh_string pki_publickey_to_blob(const ssh_key key)
             }
 
             ssh_string_burn(e);
-            ssh_string_free(e);
+            SSH_STRING_FREE(e);
             e = NULL;
 
             break;
@@ -764,16 +765,16 @@ makestring:
         goto fail;
     }
 
-    ssh_buffer_free(buffer);
+    SSH_BUFFER_FREE(buffer);
     return str;
 fail:
-    ssh_buffer_free(buffer);
+    SSH_BUFFER_FREE(buffer);
     ssh_string_burn(str);
-    ssh_string_free(str);
+    SSH_STRING_FREE(str);
     ssh_string_burn(e);
-    ssh_string_free(e);
+    SSH_STRING_FREE(e);
     ssh_string_burn(n);
-    ssh_string_free(n);
+    SSH_STRING_FREE(n);
 
     return NULL;
 }
@@ -801,42 +802,42 @@ ssh_string pki_signature_to_blob(const ssh_signature sig)
 
             r = ssh_make_bignum_string(sig->ecdsa_sig.r);
             if (r == NULL) {
-                ssh_buffer_free(b);
+                SSH_BUFFER_FREE(b);
                 return NULL;
             }
 
             rc = ssh_buffer_add_ssh_string(b, r);
-            ssh_string_free(r);
+            SSH_STRING_FREE(r);
             if (rc < 0) {
-                ssh_buffer_free(b);
+                SSH_BUFFER_FREE(b);
                 return NULL;
             }
 
             s = ssh_make_bignum_string(sig->ecdsa_sig.s);
             if (s == NULL) {
-                ssh_buffer_free(b);
+                SSH_BUFFER_FREE(b);
                 return NULL;
             }
 
             rc = ssh_buffer_add_ssh_string(b, s);
-            ssh_string_free(s);
+            SSH_STRING_FREE(s);
             if (rc < 0) {
-                ssh_buffer_free(b);
+                SSH_BUFFER_FREE(b);
                 return NULL;
             }
 
             sig_blob = ssh_string_new(ssh_buffer_get_len(b));
             if (sig_blob == NULL) {
-                ssh_buffer_free(b);
+                SSH_BUFFER_FREE(b);
                 return NULL;
             }
 
             ssh_string_fill(sig_blob, ssh_buffer_get(b), ssh_buffer_get_len(b));
-            ssh_buffer_free(b);
+            SSH_BUFFER_FREE(b);
             break;
         }
         case SSH_KEYTYPE_ED25519:
-            sig_blob = pki_ed25519_sig_to_blob(sig);
+            sig_blob = pki_ed25519_signature_to_blob(sig);
             break;
         default:
             SSH_LOG(SSH_LOG_WARN, "Unknown signature key type: %s",
@@ -873,7 +874,7 @@ static ssh_signature pki_signature_from_rsa_blob(const ssh_key pubkey, const
     }
 #ifdef DEBUG_CRYPTO
     SSH_LOG(SSH_LOG_WARN, "RSA signature len: %lu", (unsigned long)len);
-    ssh_print_hexa("RSA signature", ssh_string_data(sig_blob), len);
+    ssh_log_hexdump("RSA signature", ssh_string_data(sig_blob), len);
 #endif
 
     if (len == rsalen) {
@@ -954,43 +955,43 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
                     ssh_string_len(sig_blob));
 
             if (rc < 0) {
-                ssh_buffer_free(b);
+                SSH_BUFFER_FREE(b);
                 ssh_signature_free(sig);
                 return NULL;
             }
 
             r = ssh_buffer_get_ssh_string(b);
             if (r == NULL) {
-                ssh_buffer_free(b);
+                SSH_BUFFER_FREE(b);
                 ssh_signature_free(sig);
                 return NULL;
             }
 #ifdef DEBUG_CRYPTO
-            ssh_print_hexa("r", ssh_string_data(r), ssh_string_len(r));
+            ssh_log_hexdump("r", ssh_string_data(r), ssh_string_len(r));
 #endif
             sig->ecdsa_sig.r = ssh_make_string_bn(r);
             ssh_string_burn(r);
-            ssh_string_free(r);
+            SSH_STRING_FREE(r);
             if (sig->ecdsa_sig.r == NULL) {
-                ssh_buffer_free(b);
+                SSH_BUFFER_FREE(b);
                 ssh_signature_free(sig);
                 return NULL;
             }
 
             s = ssh_buffer_get_ssh_string(b);
             rlen = ssh_buffer_get_len(b);
-            ssh_buffer_free(b);
+            SSH_BUFFER_FREE(b);
             if (s == NULL) {
                 ssh_signature_free(sig);
                 return NULL;
             }
 
 #ifdef DEBUG_CRYPTO
-            ssh_print_hexa("s", ssh_string_data(s), ssh_string_len(s));
+            ssh_log_hexdump("s", ssh_string_data(s), ssh_string_len(s));
 #endif
             sig->ecdsa_sig.s = ssh_make_string_bn(s);
             ssh_string_burn(s);
-            ssh_string_free(s);
+            SSH_STRING_FREE(s);
             if (sig->ecdsa_sig.s == NULL) {
                 ssh_signature_free(sig);
                 return NULL;
@@ -1007,7 +1008,7 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
             break;
         }
         case SSH_KEYTYPE_ED25519:
-            rc = pki_ed25519_sig_from_blob(sig, sig_blob);
+            rc = pki_signature_from_ed25519_blob(sig, sig_blob);
             if (rc == SSH_ERROR) {
                 ssh_signature_free(sig);
                 return NULL;
@@ -1021,51 +1022,6 @@ ssh_signature pki_signature_from_blob(const ssh_key pubkey,
     return sig;
 }
 
-int pki_signature_verify(ssh_session session, const ssh_signature sig, const
-        ssh_key key, const unsigned char *input, size_t input_len)
-{
-    int rc;
-
-    if (session == NULL || sig == NULL || key == NULL || input == NULL) {
-        SSH_LOG(SSH_LOG_TRACE, "Bad parameter provided to "
-                               "pki_signature_verify()");
-        return SSH_ERROR;
-    }
-
-    if (ssh_key_type_plain(key->type) != sig->type) {
-        SSH_LOG(SSH_LOG_WARN,
-                "Can not verify %s signature with %s key",
-                sig->type_c,
-                key->type_c);
-        return SSH_ERROR;
-    }
-
-    /* Check if public key and hash type are compatible */
-    rc = pki_key_check_hash_compatible(key, sig->hash_type);
-    if (rc != SSH_OK) {
-        return SSH_ERROR;
-    }
-
-    /* For ed25519 keys, verify using the input directly */
-    if (key->type == SSH_KEYTYPE_ED25519 ||
-        key->type == SSH_KEYTYPE_ED25519_CERT01)
-    {
-        rc = pki_ed25519_verify(key, sig, input, input_len);
-    } else {
-        /* For the other key types, calculate the hash and verify the signature */
-        rc = pki_verify_data_signature(sig, key, input, input_len);
-    }
-
-    if (rc != SSH_OK){
-        ssh_set_error(session,
-                      SSH_FATAL,
-                      "Signature verification error");
-        return SSH_ERROR;
-    }
-
-    return SSH_OK;
-}
-
 static ssh_string rsa_do_sign_hash(const unsigned char *digest,
                                    int dlen,
                                    mbedtls_pk_context *privkey,
@@ -1213,6 +1169,7 @@ ssh_signature pki_sign_data(const ssh_key privkey,
                             size_t input_len)
 {
     unsigned char hash[SHA512_DIGEST_LEN] = {0};
+    const unsigned char *sign_input = NULL;
     uint32_t hlen = 0;
     int rc;
 
@@ -1232,27 +1189,38 @@ ssh_signature pki_sign_data(const ssh_key privkey,
     case SSH_DIGEST_SHA256:
         sha256(input, input_len, hash);
         hlen = SHA256_DIGEST_LEN;
+        sign_input = hash;
         break;
     case SSH_DIGEST_SHA384:
         sha384(input, input_len, hash);
         hlen = SHA384_DIGEST_LEN;
+        sign_input = hash;
         break;
     case SSH_DIGEST_SHA512:
         sha512(input, input_len, hash);
         hlen = SHA512_DIGEST_LEN;
+        sign_input = hash;
         break;
     case SSH_DIGEST_SHA1:
         sha1(input, input_len, hash);
         hlen = SHA_DIGEST_LEN;
+        sign_input = hash;
         break;
     case SSH_DIGEST_AUTO:
+        if (privkey->type == SSH_KEYTYPE_ED25519) {
+            /* SSH_DIGEST_AUTO should only be used with ed25519 */
+            sign_input = input;
+            hlen = input_len;
+            break;
+        }
+        FALL_THROUGH;
     default:
         SSH_LOG(SSH_LOG_TRACE, "Unknown hash algorithm for type: %d",
                 hash_type);
         return NULL;
     }
 
-    return pki_do_sign_hash(privkey, hash, hlen, hash_type);
+    return pki_do_sign_hash(privkey, sign_input, hlen, hash_type);
 }
 
 /**
@@ -1275,6 +1243,7 @@ int pki_verify_data_signature(ssh_signature signature,
 {
 
     unsigned char hash[SHA512_DIGEST_LEN] = {0};
+    const unsigned char *verify_input = NULL;
     uint32_t hlen = 0;
 
     mbedtls_md_type_t md = 0;
@@ -1300,23 +1269,35 @@ int pki_verify_data_signature(ssh_signature signature,
         sha256(input, input_len, hash);
         hlen = SHA256_DIGEST_LEN;
         md = MBEDTLS_MD_SHA256;
+        verify_input = hash;
         break;
     case SSH_DIGEST_SHA384:
         sha384(input, input_len, hash);
         hlen = SHA384_DIGEST_LEN;
         md = MBEDTLS_MD_SHA384;
+        verify_input = hash;
         break;
     case SSH_DIGEST_SHA512:
         sha512(input, input_len, hash);
         hlen = SHA512_DIGEST_LEN;
         md = MBEDTLS_MD_SHA512;
+        verify_input = hash;
         break;
     case SSH_DIGEST_SHA1:
         sha1(input, input_len, hash);
         hlen = SHA_DIGEST_LEN;
         md = MBEDTLS_MD_SHA1;
+        verify_input = hash;
         break;
     case SSH_DIGEST_AUTO:
+        if (pubkey->type == SSH_KEYTYPE_ED25519 ||
+            pubkey->type == SSH_KEYTYPE_ED25519_CERT01)
+        {
+            verify_input = input;
+            hlen = input_len;
+            break;
+        }
+        FALL_THROUGH;
     default:
         SSH_LOG(SSH_LOG_TRACE, "Unknown sig->hash_type: %d",
                 signature->hash_type);
@@ -1353,6 +1334,14 @@ int pki_verify_data_signature(ssh_signature signature,
 
             }
             break;
+        case SSH_KEYTYPE_ED25519:
+        case SSH_KEYTYPE_ED25519_CERT01:
+            rc = pki_ed25519_verify(pubkey, signature, verify_input, hlen);
+            if (rc != SSH_OK) {
+                SSH_LOG(SSH_LOG_TRACE, "ED25519 error: Signature invalid");
+                return SSH_ERROR;
+            }
+            break;
         default:
             SSH_LOG(SSH_LOG_TRACE, "Unknown public key type");
             return SSH_ERROR;

src/server.c

@@ -166,15 +166,22 @@ int server_set_kex(ssh_session session)
         return -1;
     }
 
-    for (i = 0; i < 10; i++) {
+    for (i = 0; i < SSH_KEX_METHODS; i++) {
         wanted = session->opts.wanted_methods[i];
-        if (wanted  == NULL) {
+        if (wanted == NULL) {
             if (ssh_fips_mode()) {
                 wanted = ssh_kex_get_fips_methods(i);
             } else {
                 wanted = ssh_kex_get_default_methods(i);
             }
         }
+        if (wanted == NULL) {
+            for (j = 0; j < i; j++) {
+                SAFE_FREE(server->methods[j]);
+            }
+            return -1;
+        }
+
         server->methods[i] = strdup(wanted);
         if (server->methods[i] == NULL) {
             for (j = 0; j < i; j++) {
@@ -195,7 +202,7 @@ int ssh_server_init_kex(ssh_session session) {
     }
 
     /* free any currently-set methods: server_set_kex will allocate new ones */
-    for (i = 0; i < 10 /* SSH_KEX_METHODS */; i++) {
+    for (i = 0; i < SSH_KEX_METHODS; i++) {
         SAFE_FREE(session->next_crypto->server_kex.methods[i]);
     }
 
@@ -264,7 +271,11 @@ SSH_PACKET_CALLBACK(ssh_packet_kexdh_init){
   return SSH_PACKET_NOT_USED;
 }
 
-int ssh_get_key_params(ssh_session session, ssh_key *privkey){
+int
+ssh_get_key_params(ssh_session session,
+                   ssh_key *privkey,
+                   enum ssh_digest_e *digest)
+{
     ssh_key pubkey;
     ssh_string pubkey_blob;
     int rc;
@@ -290,6 +301,7 @@ int ssh_get_key_params(ssh_session session, ssh_key *privkey){
         *privkey = NULL;
     }
 
+    *digest = session->srv.hostkey_digest;
     rc = ssh_pki_export_privkey_to_pubkey(*privkey, &pubkey);
     if (rc < 0) {
       ssh_set_error(session, SSH_FATAL,
@@ -306,7 +318,7 @@ int ssh_get_key_params(ssh_session session, ssh_key *privkey){
     }
 
     rc = ssh_dh_import_next_pubkey_blob(session, pubkey_blob);
-    ssh_string_free(pubkey_blob);
+    SSH_STRING_FREE(pubkey_blob);
     if (rc != 0) {
         ssh_set_error(session,
                       SSH_FATAL,
@@ -505,9 +517,11 @@ static int ssh_server_kex_termination(void *s){
     return 1;
 }
 
-void ssh_set_auth_methods(ssh_session session, int auth_methods){
-	/* accept only methods in range */
-    session->auth.supported_methods = auth_methods & 0x3f;
+/* FIXME: auth_methods should be unsigned */
+void ssh_set_auth_methods(ssh_session session, int auth_methods)
+{
+    /* accept only methods in range */
+    session->auth.supported_methods = (uint32_t)auth_methods & 0x3fU;
 }
 
 /* Do the banner and key exchange */
@@ -815,12 +829,17 @@ int ssh_message_auth_kbdint_is_response(ssh_message msg) {
   return msg->auth_request.kbdint_response != 0;
 }
 
+/* FIXME: methods should be unsigned */
 int ssh_message_auth_set_methods(ssh_message msg, int methods) {
   if (msg == NULL || msg->session == NULL) {
     return -1;
   }
 
-  msg->session->auth.supported_methods = methods;
+  if (methods < 0) {
+      return -1;
+  }
+
+  msg->session->auth.supported_methods = (uint32_t)methods;
 
   return 0;
 }
@@ -1013,14 +1032,14 @@ int ssh_message_auth_reply_pk_ok_simple(ssh_message msg) {
 
     ret = ssh_pki_export_pubkey_blob(msg->auth_request.pubkey, &pubkey_blob);
     if (ret < 0) {
-        ssh_string_free(algo);
+        SSH_STRING_FREE(algo);
         return SSH_ERROR;
     }
 
     ret = ssh_message_auth_reply_pk_ok(msg, algo, pubkey_blob);
 
-    ssh_string_free(algo);
-    ssh_string_free(pubkey_blob);
+    SSH_STRING_FREE(algo);
+    SSH_STRING_FREE(pubkey_blob);
 
     return ret;
 }