This prevents code injection.
The domain name syntax checker is based on RFC1035.
Signed-off-by: Norbert Pocs <norbertpocs0@gmail.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The hostname can be a domain name or an ip address. The colon has to be
allowed because of IPv6 even it is prohibited in domain names.
Signed-off-by: Norbert Pocs <norbertpocs0@gmail.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Using ssh_config_parse_uri can simplify the parsing of the host
parsing inside the function of ssh_options_set
Signed-off-by: Norbert Pocs <norbertpocs0@gmail.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Some architectures (s390x) provide different poll events such as POLLHUP in case
the remote end closed the connection (and they keep reporting this forever).
This is an issue when the user provided callback registering this event as an
error and tries to send some reply (for example EOF) using
`ssh_channel_send_eof()` which will lead to infinite recursion and sefgaults.
This was not solved by the 30b5a2e33b because the
POLLHUP event is not provided by the poll in events bitfield, but only reported
by the poll in revents bit field thus we need to filter these events later on
when the poll is recursively.
Fixes#202
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
(cherry picked from commit 4e56c5c956)
The FD locking was modified in 30b5a2e33b but it
caused some weird issues on s390x in Debian tests, which were getting POLLHUP,
causing infinite recursion while the callback tried to close socket.
Previously, the lock blocked only the POLLIN events as we believed these were
the only events we could get recursively that could cause issues. But it looks
like more sane behavior will be blocking everything but POLLOUT to allow the
buffers to be flushed.
Fixes#202
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
(cherry picked from commit f86bec735b)
Use the new `-L` flag for the pkd tests so that they use a
unique temporary directory for scratch space while running.
Note the choice of `pkd_scratch_XXXXXX` in contrast to a
path living under `/tmp`: by using a relative path, one can
gather the full set of log artifacts from the GitLab CI jobs
in the event that there is a test failure. The logs contain
lots of information to help pinpoint what went wrong.
Resolves https://gitlab.com/libssh/libssh-mirror/-/issues/143.
Testing notes:
- In the GitLab CI jobs I can see the flag being used, and
can observe that I am able to gather the full set of
detailed `pkd` logs in the event of a legitimate test
failure.
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 4f6aa53b16)
Teach `pkd` a new flag `-L, --temp-dir=<mkdtemp-template>` to enable
behavior whereby `pkd` creates a new temporary directory and uses it
for a workspace while running.
The original design of `pkd` assumed that it could freely use the
current working directory from wherever it happened to be invoked.
But, this could pose a problem when multiple `pkd` instances are run
in parallel from the same working directory, due to the usage of
various temporary files within that directory.
To avoid the problem of multiple `pkd` instances interfering with
each other, expose a `-L` flag for optionally specifying a `mkdtemp`
template string such that a temporary scratch space is used instead.
Testing notes:
- I ran handfuls of iterations locally using the new flag
and observed `pkd` is indeed using scratch space as desired.
Resolves https://gitlab.com/libssh/libssh-mirror/-/issues/143.
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit b610757e63)
Relax the `pthread_kill` result assertion in `pkd_stop` to tolerate
`ESRCH`, and guard against only `EINVAL` and `ENOTSUP`.
On macOS what can happen is that the `pthread_kill` returns `ESRCH` due
to the accept thread being already terminated. For that case, the
teardown path should proceed to `pthread_join`.
Testing notes:
- On my macOS setup I consistently encountered `ESRCH` in this
codepath, causing pkd tests to fail unnecessarily. With the
change, I observe the tests passing.
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit aa206cbfe5)
In e1a8b359c1 a missing `free` was
added to `pkd_cleanup_socket_wrapper` to free a string allocated
for the socket wrapper directory name.
Move that `free` such that it also runs in the error-out paths in
`pkd_cleanup_socket_wrapper`, to avoid a leak in those cases, too.
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 9514547c2a)
strtoul returns 0 if no valid character was parsed, which
can unwantedly misconfigure the options.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The return value is changed by the call to pki_key_check_hash_compatible
causing the possibility of returning SSH_OK if memory allocation error
happens later in the function.
The assignment of SSH_ERROR if the verification fails is no longer needed,
because the value of the variable is already SSH_ERROR.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This was for some reason failing on CentOS 7 in 0.10 branch so bringing this to
the master too.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This is not completely straightforward as it requires us to do some state
shuffling.
We introduce internal flag that can turn this on in client side, so far for
testing only as we do not want to universally enable this. We also repurpose the
server flag indicating the guess was wrong also for the client to make desired
decisions.
If we found out our guess was wrong, we need to hope the server was able to
figure out this much, we need to revert the DH FSM state, drop the callbacks
from the "wrong" key exchange method and initiate the right one.
The server side is already tested by the pkd_hello_i1, which is executing tests
against dropbrear clients, which is using this flag by default out of the box.
Tested manually also with the pkd_hello --rekey to make sure the server is able
to handle the rekeying with all key exchange methods.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Previously, the last two fields of KEXINIT were considered as always zero for
the key exchange. This was true for the sending side, but might have not been
true for the received KEXINIT from the peer.
This moves the construction of these two fields closer to their reading or
writing, instead of hardcoding them on the last possible moment before they go
as input to the hashing function.
This also allows accepting the first_kex_packet_follows on the client side, even
though there is no kex algorithm now that would allow this.
It also avoid memory leaks in case the server_set_kex() or ssh_set_client_kex()
gets called multiple times, ensuring the algorithms will not change under our
hands.
It also makes use of a new flag to track if we sent KEXINIT.
Previously, this was tracked only implicitly by the content of the
session->next_crypto->{server,client}_kex (local kex). If it was not set, we
considered it was not send. But given that we need to check the local kex even
before sending it when we receive first_kex_packet_follows flag in the KEXINIT,
this can no longer be used.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
These will be helpful when we already sent the first key exchange packet, but we
found out that our guess was wrong and we need to initiate different key
exchange method with different callbacks.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The information if the session is client or server session is already part of
the session structure so this argument only duplicated information.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Removed it from the wanted methods list in the ssh_options_set function. Now users have to set the compression value to 'zlib' explicitly to enable it.
Updated unit tests to reflect removing zlib compression algo from the defaults compression algorithms.
Signed-off-by: Khalid Mamdouh <khalidmamdou7@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit cb19677d2e)
The choco server is somtimes ratelimited. Avoid running into issues
and use cmake already installed on the runner.
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 0b826c986c)
The Coverity scan CID 1506418 found the null pointer dereferencing
Signed-off-by: Ahsen Kamal <itsahsenkamal@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 6d3e7e1c44)
Libssh defaults to QUIET or SSH_LOG_NONE regarding of loglevel. Have it
documented to not confuse the users.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 486df37a84)
avoids also long lines and code duplication
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Norbert Pocs <npocs@redhat.com>
(cherry picked from commit 10296dbc76)
they might be turned off and on independenty and each of them affects different
part of libssh, authentication and key exchange respectively. But only HAVE_ECC
is defined by the cmake.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Norbert Pocs <npocs@redhat.com>
(cherry picked from commit 492f5d82b8)
This prevents building the pkcs11-related functions and printing pkcs11-related
log messages when the libssh is built without PKCS#11 support.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Norbert Pocs <npocs@redhat.com>
(cherry picked from commit ab24110ae0)
This adjusts also usage of ARGP_LIBRARY to use ARGP_LIBRARIES which is defined
by the FindArgp module, unlike the former one in case it is provided by libc
directly.
Fixes: #167
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Norbert Pocs <npocs@redhat.com>
(cherry picked from commit 8f237bde15)
To be able to enable sk-ecdsa, sk-edd25519 key usage from the config file
the algorithms are needed to be listed in the algorithm lists.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 96ad1b380d)
Test that ssh_options_apply can be called multiple times without expanding
escape characters more than once. If the options are updated after calling
ssh_options_apply keep the last options.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(backported from commit df48ddd895)
Test if the ssh_options_apply is called on session before ssh_options_copy,
then `opts.identity` ssh_list will be copied
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit c0c063f94c)
Calling `ssh_options_apply` more times can result in an unwanted behaviour of
expanding the escape characters more times. Adding flags to check if the
expansion was already done on the current string variables.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 1bd499febb)
The configuration of identities are first saved to `opts.identities_non_exp`,
then moved to `opts.identities` after calling ssh_options_apply and expanding
the identity strings. These tests are testing against the proper configuration
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(backported from commit 87d694d5ad)
Expanding a string twice could lead to unwanted behaviour.
This solution creates a ssh_list (`opts.identites_non_exp`) to store the strings
before expansion and by using ssh_apply it moves the string to the
`opts.identities`. This way the expanded strings are separated.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 1ff893c914)
The openssl 3.0 support has introduced some memory leaks at key build as
OSSL_PARAM_BLD_push_BN duplicates the bignum and does not save the pointer
itself.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 4cd58350a8)
src/init.c:118:9: warning: incompatible implicit declaration of built-in
function 'fprintf' [enabled by default]
fprintf(stderr, "Error in auto_init()\n");
^
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Norbert Pocs <npocs@redhat.com>
(cherry picked from commit da357b1cb4)
src/dh.c:824:5: warning: incompatible implicit declaration of built-in
function 'fprintf' [enabled by default]
fprintf(stderr, "%s\n", fingerprint);
^
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 9941e89f30)
"new" is a c++ keyword which will make the build fail.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 23cebfadea)
"new" is a c++ keyword which will make the build fail.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 9d429eda93)
"template" is a c++ keyword which will make the build fail.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 34baecf49a)
To make sure c++ name mangling works correctly c code should be noted "extern"
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit d1947b55ec)
libsofthsm detection is broken in i686 architecture. The approach is to export
the path found by cmake to `tests_config.h` and the script
setup-softhsm-tokens.sh gets that value through cli parameters.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 50713d8ab1)
The error was the following
/builds/libssh/libssh-mirror/examples/sshnetcat.c:241:18: error: a function
declaration without a prototype is deprecated in all versions of C
[-Werror,-Wstrict-prototypes]
void cleanup_pcap(){
^
void
and similar
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
(cherry picked from commit 22f0f0dd60)
Let's check tests in fips mode with an up to date system too as we already
found some issues running the tests there.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 7757ebf7a5)
When we decide we need to rekey, we enqueue any further packets until we've sent
our SSH2_MSG_NEWKEYS message, after which we dequeue these packets and send them
to the other side. This enqueueing is done based on ssh_packet_in_rekey checking
the session flags and whether DH handshake state is marked as finished.
However, the handshake state is not reset to DH_STATE_FINISHED until the other
side has sent us their new keys. This leaves a gap between sending our new keys
and receiving the other side's new keys where we would still decide to enqueue a
packet.
These enqueued packets will not be dequeued as we've already sent our new keys.
Once we've received the other side's new keys, we'll go back to a finished
handshake and we will send out our caller's new data, skipping however much data
we've enqueued.
Fix this by changing ssh_packet_in_rekey to return false once we've sent our new
keys.
Signed-off-by: Carlos Martín Nieto <carlosmn@github.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 346e6db318)
Commit 8cf9c816 "Do not force GNU_SOURCE during build to fix#141" has broken support for CYGWIN.
The build hangs with this error message:
libssh-0.10.4/src/config.c: In function ‘local_parse_glob’:
libssh-0.10.4/src/config.c:252:25: error: ‘GLOB_TILDE’ undeclared (first use in this function)
252 | rt = glob(fileglob, GLOB_TILDE, NULL, &globbuf);
| ^~~~~~~~~~
I think that it would be better to re-add it, by using target_compile_definitions() rather than target_compile_options(), which is more appropriate in my opinion.
Signed-off-by: Carlo Bramini carlo_bramini@users.sourceforge.net
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 37deed27d6)
FIPS 140-3 puts big limitations on using TDEA and it is
already disabled in rhel9.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 76d375064b)
This fixes patch relocation of the output of pkgconfig by adding
missing keywords like prefix, exec_prefix, libdir and includedir.
The pkgconfig output changes are like following:
* Before:
$ pkg-config -libs libssh
-lssh
* After:
$ pkg-config -libs libssh
-LF:/msys64/ucrt64/lib -lssh
See https://people.freedesktop.org/~dbn/pkg-config-guide.html for
further documentation.
Signed-off-by: Biswapriyo Nath <nathbappai@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 425353d986)
Missing escaping results in syntax errors in Zsh shell because of square
brackets getting interpreted as being a pattern for globbing.
Signed-off-by: Thomas Baag <libssh-git@spam.b2ag.de>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit bccb8513fa)
The key_type is only a letter, if we use and `int` and then cast it to
(const char *) we will end up with a 0 value on big endian.
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
We should not end up with an infinite loop here.
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
(cherry picked from commit accbc91a86)
The test failed on Fedora Koji and openSUSE Build Service on i686 only. Probably
the rekey on the server needs longer here to collect enough entropy. So we need
to try harder before we stop :-)
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit b3b3fbfa1d)
This wont create a new process but replace the shell.
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit bd2db30174)
The ncat tool from nmap is available on all unix platforms. The nc
binary might link to ncat or something else. Settle on one we know
also the options can be used if needed.
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 6268417ac6)
error: ‘%u’ directive output may be truncated writing between 1 and 10
bytes into a region of size 6.
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 20406e51c9)
mingw does have this function, even though it appears to be deprecated.
So the symbol has to have a different name, or linking becomes
impossible.
Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 17aec429f5)
The old version is missing the EVP_PKEY_up_ref(), which is needed to keep track
of the EVP_PKEY references.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
(cherry picked from commit 6e2648af6b)
what we set in open funtion by the argument mode. The mode of the created file
is (mode & ~umask), So we set umask to typical default value(octal 022).
Signed-off-by: renmingshuai <renmingshuai@huawei.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
(cherry picked from commit 1286a70e13)
This also allows testing mbedtls with the PKCS8 PEM files
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
(cherry picked from commit 66be590657)
The external ed25519 requires also the sha512 functions to work.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
(cherry picked from commit c09b02c573)
The curve25519 depends on ssh_get_random, which is normally built into libssh.
For the external override tests to build, we need to have them in separate
source file that can be included for this test.
For some reason, this did not happen on CI builds, but it did happen in koji
during RPM builds.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
(cherry picked from commit 0da54f2908)
The KDF was changed in the new API, fetching the algorithm first
then creating the context using it.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 9a4c5203af)
The new API does not provide EVP_KDF_CTX_new_id function, insted
it works with EVP_KDF_CTX_new and fetching the algorithm.
Adding a check for both to make it work with the new API too.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
(cherry picked from commit 8343a43edc)
EVP_PKEY_dup can't be used with ENGINE generated keys and
the key can't be freed because it is passing the main key
from the struct.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Rawhide has openssl 3.0 support which can test the new changes.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
New openssl API, libmbedtls, libgcrypt use size_t for
HMAC len pameter.
New helper functions were added in libcrypto.c to avoid
code duplication. (the header pki.h is needed for this
reason)
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
- strerror_r for linux
- strerror_s for windows
Keep in mind that strerror_r has two versions:
- XSI
- GNU
see manpage for more information
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The tests are compiled without -D_GNU_SOURCE, therefore
the XSI version of strerror_r is used. Defining
_GNU_SOURCE in torture.h then including *.c gives error
because it is assuming GNU version of strerror_r in
the source file.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Fix#98 by adding 'ssh_session_set_disconnect_message' Whenever the ssh
session disconnects a "Bye Bye" message was set and displayed. Now the
peer has a choice to set a customised message to be sent after the
session is disconnected. The default "Bye Bye" will be set if this
function is not called or not called correctly. The testcases in
tests/server/torture_server can also demonstrate how this function
works.
Signed-off-by: Om Sheladia <omsheladia10@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This commit adds an `agent_socket` field to the session options
and connects the config parser to that option.
`SSH_OPTIONS_IDENTITY_AGENT` is added to allow applications to
set this option for themselves.
agent.c is updated to take the `agent_socket` value in preference
to the `SSH_AUTH_SOCK` environment variable.
Signed-off-by: Wez Furlong <wez@fb.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Windows has supported unix domain sockets for a couple of years
now; see this article for more information about that:
<https://devblogs.microsoft.com/commandline/af_unix-comes-to-windows/>
This commit allows libssh to consider using agent authentication
on Windows systems.
It is mostly removing `#ifndef _WIN32` that prevented the unix
domain socket code from being compiled in, and adjusting the use
of `read(2)` and `write(2)` to `recv(2)` and `send(2)`, as the former
functions are not compatible with sockets on Windows systems.
For mingw systems, afunix.h isn't available so we use the
technique as was used to resolve building with mingw as used
by the curl project in: https://github.com/curl/curl/pull/5170
Signed-off-by: Wez Furlong <wez@fb.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
According to the documentation the return value is the number of
processed bytes, so the returned value is never negative. We should not
use ssize_t in public headers as it isn't available on Windows! We only
have it defined in priv.h!
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Contaminated errno can happen before strtoul call, thereofore
cleaning it before the call.
The errno is not used for checking later in code if fail happens,
therefore cleaning it right after error.
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
also remove anything mentioning limitation to SSHv2 as it is the only
protocol supported these days.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The cmocka captures all signals so I was not able to reproduce the code
path. But leaving the code in for future readers.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Added API function ssh_channel_open_forward_port that is the same as
ssh_channel_accept_forward with the addition to determine the
originator address and port
Signed-off-by: Tomas Holmqvist <tomhol@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Thanks to Harry Sintonen from WithSecure for pointing this out.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Thanks to Harry Sintonen from WithSecure for pointing this out.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Thanks to Harry Sintonen from WithSecure for pointing this out.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Thanks to Harry Sintonen from WithSecure for pointing this out.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The original key had 2018 bits, which falls short for current security
requirements
Steps I used:
$ ssh-keygen -f tests/keys/certauth/id_rsa -t rsa -b 2048 -C libssh_torture_auth -N ''
$ ssh-keygen -s tests/keys/user_ca -I torture_auth_carlos -n alice ./tests/keys/certauth/id_rsa.pub
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Remove config options: protocol, mac, cipher, compressionlevel,
gssapikeyexchange,
gssapirenewalforcesrekey,
gssapitrustdns,
rhostsrsaauthentication,
rsaauthentication,
useprivilegedport,
pubkeyacceptedtypes
since they are not supported by OpenSSH
Rename some config options:
hostbasedkeytypes, challengeresponseauthentication and pubkeyacceptedkeytypes
to hosbasedacceptedalgorithms, kdbinteractiveauthentication and pubkeyacceptedalgorithms
to be consistent with the OpenSSH manual https://man.openbsd.org/sshd_config.
Keep pubkeyacceptedkeytypes for backward compatibility.
Rename SOC_PUBKEYACCEPTEDTYPES to SOC_PUBKEYACCEPTEDKEYTYPES in config.h
Update unittests/torture_config.c and unittests/torture_options.c
Signed-off-by: Anh Minh Tran <anhminh@seznam.cz>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Use the POSIX strtok_r() or equivalent implementations to resolve.
Thanks to @wez1 for the early review.
Fixes#104
Signed-off-by: Gene Oden <goden@fb.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
FIPS_mode function is no longer supported in openssl version 3
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The libssh versions before this included files with relative path based
on the current working directory, which can result unexpected results
and is different from the OpenSSH include behavior. The manual page for
ssh_config lists:
> iles without absolute paths are assumed to be in ~/.ssh if included in
> a user configuration file or /etc/ssh if included from the system
> configuration file.
This is following the semantics as close as possible with a difference
that we do not use the hardcoded ~/.ssh for user configuration files,
but the path defined with SSH_OPTIONS_SSH_DIR, which is already used
to reference any other files in used home directory.
Fixes#93
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This fails if the gethostname() fails in a way that does not write the
buffer, but returns 0 as a success.
Fixes#106
Thanks oss-fuzz
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Sahana Prasad <sahana@redhat.com>
This prevents the usage of uninitialized value on error in the known
hosts hasing code if invalid (empty) hostname is used.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Sahana Prasad <sahana@redhat.com>
The adjacent question marks and asterisks can be simplified to single
wildcard so there is no need to excersise all the recursive pattern
matching.
These inputs were generated by oss-fuzz and probably caused also the
previously reported timeouts.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This is more than enough as it reflects to 16 asterisks in the match
string is more than enough. With larger values oss-fuzz was generating
long match strings with asterisks interleaved with normal characters,
which were timing out.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Currently Compression=no (the default) force-disables zlib algos, while
Compression=yes force-enables it. This means that mismatching options between
client and server lead to connection failure. This can easily happen if the
server has default settings but the client specifies Compression=yes.
OpenSSH treats the option as a "prefer compression" setting:
Compression=no -> none,zlib@openssh.com,zlib (default)
Compression=yes -> zlib@openssh.com,zlib,none
This commit changes the libssh behaviour to the same as OpenSSH.
Signed-off-by: Fabian Vogt <fabian@ritter-vogt.de>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
RFC 4252 §7 states that the public key algorithm in a
SSH_MSG_USERAUTH_PK_OK response is the public key algorithm name from
the request. When using RSA with SHA-2, this will be either
"rsa-sha2-256" or "rsa-sha2-512" as specified by RFC 8332 §3.2.
However, currently libssh emits the public key type instead, which is
"ssh-rsa". This is not in conformance with the RFCs, so let's fix this
by storing the signature type and emitting it in our response instead of
the public key when sending SSH_MSG_USERAUTH_PK_OK in the server.
Signed-off-by: brian m. carlson <bk2204@github.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Similarly as we already have for the client configuraiton file
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Do not compile tests which need SSHD_EXECUTABLE when
it is not available
Signed-off-by: Norbert Pocs <npocs@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Calling some channel procedures on a freed channel is always resulting
in segmentation fault errors. The reason is that when a channel is
freed with 'ssh_channel_do_free' procedure, its 'session' field is set
to NULL; then when a channel procedure tries to access any field of
'channel->session' structure it is effectively dereferencing a NULL
pointer.
The change fixes that behavior by adding a check which ensures that a
channel state is not SSH_CHANNEL_FLAG_FREED_LOCAL before accessing its
parent session.
Also the test suite is updated to check for the fixed errors, and the
Doxygen documentation updated accordingly.
There was a bug introduced in b0fb7d15: 'ssh_channel_poll',
'ssh_channel_poll_timeout' and 'ssh_channel_get_exit_status' would
compare the channel state to the 'SSH_CHANNEL_FLAG_FREED_LOCAL'
constant to check if the channel is alive. But the procedures must
check the channel flags for the presence of
'SSH_CHANNEL_FLAG_FREED_LOCAL' bits instead. This change fixes the
bug.
Signed-off-by: Artyom V. Poptsov <poptsov.artyom@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
We do not use SHA1 as it is disabled in many systems
Verifies CVE-2021-3634
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Normally, the length of session_id and secret_hash is the same,
but if we will get into rekeying with a peer that changes preference
of key exchange algorithm, the new secret hash can be larger or
smaller than the previous session_id causing invalid reads or writes.
Resolves https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35485
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
and add LOG_SIZE macro to control the buffer size
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Change-Id: I3eaeea001fc531fdb55074fc3a9d140b27847c1f
since ssh_scp_deny_request is seldom called, let's
utilize malloc to reserve the precise size memory.
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Change-Id: I8e7a6d3153cff7691329b9487cd534a7f2887a35
to avoid allocate 4KB buffer from stack
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Change-Id: Id144ff764ee1ae98f87aee36793a9f0e4fce21b7
so the same code base demo both multi-process and multi-thread model
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Change-Id: I98554a99b7a31586be37abde7c357f81a05c3d6e
to avoid allocate 16KB buffer from stack and one memory copy
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Change-Id: Ib71cb5834b7810bf9791e13c58571e2b9fa5bca1
to avoid allocate 8KB buffer from stack
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Change-Id: Ifc198705cb8ecec6f0a609f84965382dc151693b
to reduce the stack size requirement
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Change-Id: I6a91250524786af3358b0fd0f05ba8e45f76d278
to match the implemntation in packet_crypt.c
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Change-Id: Ib76c3585f67dae22ed0f1dfc10dadcd03c762032
to avoid their prototype different from ssh_cipher_struct
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Change-Id: I6cba2d4fea131f13d028226023da692494caa87d
We need a new one. Disable till set up and registered
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
enable pass username and password from command line
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Change-Id: I6404b90a99253d3240f7a28827635b159ff6a574
and free sources at the end of program
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Change-Id: Ia6a51d52439722b46547449e85350b3193e5ba28
since not all POSIX platform support SIGWINCH signal
and remove the global variable chan
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Change-Id: I70217020c84b056270ed680008a1871383b5fc7b
This started failing CI on Fedora with new GCC
/builds/jjelen/libssh-mirror/src/external/ed25519.c:80:48: error: argument 1 of type 'unsigned char *' declared as a pointer [-Werror=array-parameter=]
80 | int crypto_sign_ed25519_keypair(unsigned char *pk,
| ~~~~~~~~~~~~~~~^~
In file included from /builds/jjelen/libssh-mirror/src/external/ed25519.c:15:
/builds/jjelen/libssh-mirror/include/libssh/ed25519.h:46:48: note: previously declared as an array 'uint8_t[32]' {aka 'unsigned char[32]'}
46 | int crypto_sign_ed25519_keypair(ed25519_pubkey pk, ed25519_privkey sk);
| ~~~~~~~~~~~~~~~^~
/builds/jjelen/libssh-mirror/src/external/ed25519.c:81:48: error: argument 2 of type 'unsigned char *' declared as a pointer [-Werror=array-parameter=]
81 | unsigned char *sk)
| ~~~~~~~~~~~~~~~^~
In file included from /builds/jjelen/libssh-mirror/src/external/ed25519.c:15:
/builds/jjelen/libssh-mirror/include/libssh/ed25519.h:46:68: note: previously declared as an array 'uint8_t[64]' {aka 'unsigned char[64]'}
46 | int crypto_sign_ed25519_keypair(ed25519_pubkey pk, ed25519_privkey sk);
| ~~~~~~~~~~~~~~~~^~
/builds/jjelen/libssh-mirror/src/external/ed25519.c:117:46: error: argument 5 of type 'const unsigned char *' declared as a pointer [-Werror=array-parameter=]
117 | const unsigned char *sk)
| ~~~~~~~~~~~~~~~~~~~~~^~
In file included from /builds/jjelen/libssh-mirror/src/external/ed25519.c:15:
/builds/jjelen/libssh-mirror/include/libssh/ed25519.h:61:27: note: previously declared as an array 'const uint8_t[64]' {aka 'const unsigned char[64]'}
61 | const ed25519_privkey sk);
| ~~~~~~~~~~~~~~~~~~~~~~^~
/builds/jjelen/libssh-mirror/src/external/ed25519.c:180:51: error: argument 5 of type 'const unsigned char *' declared as a pointer [-Werror=array-parameter=]
180 | const unsigned char *pk)
| ~~~~~~~~~~~~~~~~~~~~~^~
In file included from /builds/jjelen/libssh-mirror/src/external/ed25519.c:15:
/builds/jjelen/libssh-mirror/include/libssh/ed25519.h:76:26: note: previously declared as an array 'const uint8_t[32]' {aka 'const unsigned char[32]'}
76 | const ed25519_pubkey pk);
| ~~~~~~~~~~~~~~~~~~~~~^~
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Sahana Prasad <sahana@redhat.com>
to avoid their prototype different from ssh_cipher_struct
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Sahana Prasad <sahana@redhat.com>
Change-Id: I6cba2d4fea131f13d028226023da692494caa87d
to match the implemntation in packet_crypt.c
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Sahana Prasad <sahana@redhat.com>
Change-Id: Ib76c3585f67dae22ed0f1dfc10dadcd03c762032
Currently "cmake -G Ninja" complains about "multiple rules generate
src/libssh_dev.map", because the target has the same name as the output
of the custom command.
Signed-off-by: DDoSolitary <DDoSolitary@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Due to the missing include, the compiler makes assumptions and leads to
a crash in ssh_mutex_lock() during runtime.
Signed-off-by: Chris Townsend <christopher.townsend@canonical.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Calling set_target_properties directly overrides previously set flags,
so replace them with target_compile_definitions and target_link_options.
Signed-off-by: DDoSolitary <DDoSolitary@gmail.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This adds a test to check if the internal implementation is not used
when it is not supposed to be used.
To be able to override functions using LD_PRELOAD, a shared version of
the torture library was added, as well as a shared library for each
of the algorithms implemented internally (ChaCha20, Poly1305,
curve25519, and ed25519).
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Previously, the mbed TLS implementation wouldn't be use at all when
available, being the internal implementation always used instead.
This corrects few bugs and makes the mbed TLS implementation to be used
when ChaCha20 and Poly1305 are available.
This also makes the constant time comparison to be used when checking
the authentication tag.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
When checking the authentication tag, use secure_memcmp() instead of
memcmp().
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
When comparing the authentication tag for chacha20-poly1305, use the
constant time CRYPTO_memcmp() instead of memcmp().
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Move the secure_memcmp() function to a shared source to make it
available internally for other crypto implementations.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The test for delayed close asks for the execution of a command that
generates big output (larger than the default window) to make data to
remain in buffers while the close message arrives, triggering the
delayed channel closure.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
If the SSH2_MSG_CHANNEL_CLOSE was previously received, change the
channel state to SSH_STATE_CHANNEL_CLOSED in
ssh_channel_read_timeout() after reading all data available.
Fixes T31
Signed-off-by: Tom Deseyn <tom.deseyn@gmail.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
OpenSSL 1.0.1 has support for CTR & GCM modes so the checks here are no
longer needed. This allows for a bunch of additional cleanup of the old
code.
As for old MacOS versions etc, LibreSSL is a kind of compatibility layer
there but things already don't work anyway with that, so it doesn't
break anything that isn't already broken. OpenSSL is needed on MacOS
separately anyway (like installed with Homebrew).
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
CRYPTO_THREADID_set_callback is available since 1.0.1 which is the
oldest supported version. This means the check and compatibility code
can be removed.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Since OpenSSL 1.0.1 is the minimum version, this function is always
available so no compatibility check is needed anymore.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This can be implemented with the init directly when the context is
reused. When a new cipher context is allocated, no initialization call
is needed either so this moves the logic to one place as well.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Now that the minimum OpenSSL version is 1.0.1, we know that the EVP HMAC
API is always available. This switches to this API. The existing API is
deprecated for OpenSSL 3.0.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This fixes the formatting for src/libcrypto.c for the last bits where it
is not correct.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The HMAC_CTX_free function in the compat layer already handles this so
there's no need to add conditional logic to the code here.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This specific cleanup function describes better what happens here and is
available for older OpenSSL releases.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This isn't referenced anywhere outside of the compatibility layer so it
is unneeded.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The EVP_MD_CTX_reset function is not used anywhere outside of the compat
layer and is not needed there. The only usage in the compat layer is for
cleanup, but EVP_MD_CTX_cleanup can be used for that which is availble
at least since OpenSSL 0.9.8.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Older OpenSSL version have a cleanup function that can be used here.
This removes a whole bunch of now no longer needed logic and custom
conditionals.
These functions have existed since 0.9.8 and can be used here.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This function is not needed, because in each case it is used, we follow
it up immediately with an initialization function call. This means that
the zeroing here is unneeded, since the initialization already
guarantees things end up in the right state.
It also swaps the reset call with a simpler init call, also because
reset is implemented as init with a return value that is always 1. That
means the more complex logic is not needed at all.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
EVP_MD_CTX_new / EVP_MD_CTX_free is the current recommended / documented
API. The other names are defined as aliases for backwards compatibility.
The other part here is that EVP_MD_CTX_init is not needed for a context
allocated with EVP_MD_CTX_new. Only for the compatibility path for older
OpenSSL is the init needed if the structure is allocated directly.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This is now the minimum version, so check it in the CMake configuration.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
OpenSSL 0.9.7 is already not supported, so clean up the old legacy bits
for that as well.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This updates the minimum version requirement for OpenSSL in the
documentation to 1.0.1 and also updates the practical minimum CMake
version.
Why pick 1.0.1 as the minimum? Main reason is whatever is still out
there with long term support contracts etc. One of the oldest I could
find is Ubuntu 14.04 which still has paid extended support and is on
1.0.1.
Another reason that 1.0.1 is probably a good minimum is a bit more
involved. 1.0.1 is the first version to add TLS 1.2. Large parts of the
internet have TLS 1.2 as a minimum requirement. This means that systems
with OpenSSL older than 1.0.1 already can't access large parts of the
internet anyway, so not supporting the latest libssh there either is ok
I think.
Bumping minimum support also means things like the HMAC API can be moved
to the more recent EVP style APIs and things can be more easily made
compatible with the deprecated APIs in OpenSSL 3.0.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Another item identified during code review was cases where the return
value of ssh_list_new() was not properly checked and handled. This
updates all cases that were missing this to handle failure to allocate a
new list.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
These calls can fail and the return code should always be checked. These
issues were identified when code review called it out on new code. The
updates here are to existing code with no behavior changes to make
review simpler.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
In https://gitlab.com/libssh/libssh-mirror/-/merge_requests/145#note_463232084
behavior in libssh was identified where it diverges from how for example
OpenSSH behaves. In OpenSSH if a request success of failure message is
received, apart from it being treated as a keepalive message, it is
ignored otherwise.
Libssh does handle the unexpected message and triggers an error
condition internally. This means that with the Dropbear behavior where
it replies to a hostkeys-00@openssh.com message even with a want_reply
= 0 (arguably a bug), libssh enters an error state.
This change makes the libssh behavior match OpenSSH to ignore these
messages. The spec is a bit unclear on whether Dropbear is buggy here or
not, but let's be liberal with the input accepted here in libssh.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
FindOpenSSL.cmake usually defines this synonym, but it doesn't on CMake < 3.16 when building on Windows outside of Cygwin.
Signed-off-by: Kevin Kane <kkane@microsoft.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The build currently breaks when attempting to link libssh.so using a statically-linked OpenSSL. -ldl and -lpthread are required when linking a binary with the static libcrypto.a. The OPENSSL_CRYPTO_LIBRARY does not include these dependencies when linking against static OpenSSL. OPENSSL_CRYPTO_LIBRARIES contains the correct dependencies in both static and shared configurations; -ldl and -lpthread are not required when linking against shared libcrypto.so.
This change changes all uses of OPENSSL_CRYPTO_LIBRARY to OPENSSL_CRYPTO_LIBRARIES to let the FindOpenSSL CMake module always provide the correct libraries at link time.
Signed-off-by: Kevin Kane <kkane@microsoft.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The build currently breaks when attempting to link libssh.so using a
statically-linked OpenSSL. -ldl and -lpthread are required when linking
a binary with the static libcrypto.a. The OPENSSL_CRYPTO_LIBRARY does
not include these dependencies when linking against static OpenSSL.
OPENSSL_CRYPTO_LIBRARIES contains the correct dependencies in both
static and shared configurations; -ldl and -lpthread are not required
when linking against shared libcrypto.so.
This change changes all uses of OPENSSL_CRYPTO_LIBRARY to
OPENSSL_CRYPTO_LIBRARIES to let the FindOpenSSL CMake module always
provide the correct libraries at link time.
Signed-off-by: Kevin Kane <kkane@microsoft.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
These are disabled in latest since Dropbear 2020.79, while
older do not support anything better than aes-ctr ciphers.
We should implement some dynamic algorithm detection for dropbear
too to increase test coverage.
https://bugs.libssh.org/T252
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
There's currently a bug in libssh that a handshake doesn't complete if
there is no overlap between HMAC methods, but when an AEAD cipher is
used.
In case of an AEAD cipher such as chacha20-poly1305 or aes256-gcm, the
HMAC algorithm that is being picked is not relevant. But the problem
here is that the HMAC still needs to have an overlap in the handshake,
even if it is not used afterwards.
This was found with a very strict server side configuration with libssh
where only AEAD ciphers and EtM HMAC modes are accepted. The client
tested against was dropbear.
Dropbear does have support for chacha20-poly1305 and AES GCM modes, but
no support for EtM HMAC modes. This meant that the libssh server in this
case rejected the dropbear client, even though it is perfectly able to
serve it since dropbear supports AEAD algorithms.
The fix implemented here updates the HMAC phase of the handshake to
handle this case. If it detects an AEAD cipher is used, it uses the HMAC
abbreviations for the method instead. This is the same name that is used
in other places as well. It matches the client to server and server to
client values, but it does depend on the order of things in the
ssh_kex_types_e enum, which I'm assuming here is ok since it's explicit.
I've looked at how to add a test for this, but I couldn't really find a
suitable place for it. I would love some tips if this is easily
possible, or if it's easier for someone else to contribute, that's of
course welcome too.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This adds an initial test with all AEAD modes to verify that they work
if there is no overlap in HMAC ciphers.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The “SubmittingPatches” file is no more since commit
a76badf77a, but the READMEs were still
referencing it.
They now correctly point to “CONTRIBUTING.md”.
Signed-off-by: Paul Capron <paul@fragara.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
There were two identical entries for v0.3.1, next to each other.
Signed-off-by: Paul Capron <paul@fragara.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
In function pki_signature_from_blob(), the warning message in case of
an oversized RSA key was missing an ‘o’ (reading “to” instead of “too”).
While we are here, make this oversized message the same than the ones
found in pki_crypto.c & pki_mbedcrypto.c: put the expected size in it.
The message in case of an _under_sized key include the expected size,
so that’s more consistent in that regard too (and more informative!)
Signed-off-by: Paul Capron <paul@fragara.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The preprocessor guard was previously effectively inoperative;
it used to read “MAX_PACKAT_LEN” (note the ‘A’!), now is ‘E’.
Signed-off-by: Paul Capron <paul@fragara.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Avoid calling random() and use ssh_get_random() instead.
CID #1412376
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
In 906cc7e7e9 a memory leak was fixed but
a similar one is present here that needs a fix as well.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Add a test case to verify that the server returns the correct signature
when it negotiated an RSA signature algorithm for the host key different
from the one it prefers (e.g. when the client prefers ssh-rsa over
rsa-sha2-256 and rsa-sha2-512).
Fixes T240
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The test checks if the client can handle the error returned by the
server when the maximum number of channel sessions is exceeded.
Fixes T239
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
OpenSSH disabled them in 2014 and 2017 for servers and clients so its our
turn to follow the suit.
Fixes T236
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The test might fail if there is a local configuration file that changes
the location of the known_hosts file. The test should not be affected
by configuration files present in the testing environment.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
If the server properly closed the channel, the client should not return
error if it finds the channel closed.
Fixes T231
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Previously, the exec example would fail if it could not write the whole
read buffer to stdout. With this changes, the exec example will be able
to write parts of the buffer until the whole buffer is written.
This makes the exec example to run when the stdout buffer is small.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The test checks if a command appended to the file path is not executed.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Thanks to Ramin Farajpour Cami for spotting this.
Fixes T232
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
They do not build anymore and I believe most of their functionality is already
covered by new testst.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
ssh_pki_export_pubkey_blob() is incorrectly used to export ecdsa pubkeys from privkeys
when pubkeys are not imported into pkcs #11 tokens.
Signed-off-by: Sahana Prasad <sahana@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
determines if public keys must be loaded in pkcs #11 tokens or not.
tests: Adds the load_public parameter in all files where torture_setup_tokens() was used.
Signed-off-by: Sahana Prasad <sahana@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
private keys for ecdsa keys.
ssh_userauth_publickey() calls ssh_pki_export_pubkey_blob() and tries to export
the the public key from private key if public keys are not already imported
into pkcs #11 tokens.
Signed-off-by: Sahana Prasad <sahana@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Set the cmake project verision to the autogenerated file to have a single
point to set the version. This will be included in the libssh.h file.
Pair-Programmed-With: Andreas Schneider <asn@cryptomilk.org>
Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
tests/fuzz/ssh_client_fuzzer.cpp:45:1: error: designator order for field ‘ssh_callbacks_struct::userdata’ does not match declaration order in ‘ssh_callbacks_struct’
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This option is unknown to older OpenSSH versions (for example CentOS 7
with OpenSSH 7.4) so we can not add it everywhere.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Add SSH_AGAIN as return value to ssh_handle_packets documentation.
Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The introduction of stages in gitlab-ci had quite a unfortune side
effect that is described in the documentation [1]. The whole artifacts
path (in our case obj/) is passed from one stage to another by default,
which is causing very odd behavior as the previous results are only
partially overwritten by the new cmake command and can even lead to
execution of tests that are not supposed to run in particular job.
[1] https://docs.gitlab.com/ee/ci/yaml/#dependencies
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
The OpenSSH 7.4 or 7.6 in Ubuntu and CentOS 7 does not support SHA2
RSA certificates and libssh automatically falls back to SHA1, which
is not allowed by default.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Previously, it would use only the default set, which makes some tests failing
including the DSA ones and disabled RSA with SHA1.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
EVP_CIPHER_CTX_init was replaced with _reset.
Removed EVP_CIPHER_CTX_cleanup. The successive _free call handles that.
Removed old SSLeay function usage.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Added extra functions. The next commit will switch to them.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
All subsecond timestamps are only in the packets if both the
SUBSECOND_TIMES flag and the timestamp flag, e.g. ATTR_ACCESSTIME
are set.
SUBSECOND_TIMES are not very common across server implementations
(e.g. openssh does not include it, nor does libssh's sftpserver
implementation), but this interpretation of the SFTP protocol draft
is used by WinSCP and lftp.
Fixes T219.
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
If the library is not initialized, SSH_ERROR is returned and the error
message is set properly.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The introduced function returns whether the library is initialized or
not.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
When libssh is statically linked, it is necessary to explicitly call
ssh_init() before calling any other provided API. It is also necessary
to call ssh_finalize() before exiting to free allocated resources.
Fixes T222
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
fail_msg() is not expected to return. Mark the points after calling it
as unreachable to clarify this to the compiler.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Timeout will kill the server if it hangs.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Use the function which starts the test server under timeout. This way
timeout will kill the server if it hangs.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The added function runs the test server under timeout program to kill it
if it elapses the default timeout of 5 minutes.
An auxiliary function to create a libssh server configuration file was
also added.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Using the added option it is possible to set a path to a file in which
the server will write its PID.
This can be used later to kill the server.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Ignore the system-wide configuration when simply trying to reach the
host.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
When a key is rejected, free the allocated memory before returning.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Verify the error code returned by kill() in torture_terminate_process().
The error code is raised when killing the process failed.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The SFTP files wouldn't be closed during the rekey tests leading to
memory leak.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The temporary directory created in torture_sftp_session() wouldn't be
removed. This removes such directory in torture_sftp_close().
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
In torture_reload_sshd_server(), instead of trying to use SIGHUP to
reload the configuration file, kill the original process and create a
new one with the new configuration. With this change, both
torture_setup_sshd_server() and torture_reload_sshd_server() need to
start sshd, with the only difference in the configuration setup. The
shared code to start the sshd server was moved to a new introduced
internal function torture_start_sshd_server().
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This adds server-side support for the newly introduced OpenSSH
keytypes sk-ecdsa-sha2-nistp256@openssh.com and sk-ed25519@openssh.com
(including their corresponding certificates), which are backed
by U2F/FIDO2 tokens.
Change-Id: Ib73425c572601c3002be45974e6ea051f1d7efdc
Signed-off-by: Sebastian Kinne <skinne@google.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The obj directory is not created anymore when the git repository is
cloned. Create the directory during the build.
Also set the variable "ErrorActionPreference: STOP" to make the build to
fail if an error occurs.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The error was
src/options.c:971:13: warning: Value stored to 'u' is never read
# u = 0;
# ^ ~
src/options.c:971:13: note: Value stored to 'u' is never read
# u = 0;
# ^ ~
# 969| case SSH_OPTIONS_KBDINT_AUTH:
# 970| case SSH_OPTIONS_GSSAPI_AUTH:
# 971|-> u = 0;
# 972| if (value == NULL) {
# 973| ssh_set_error_invalid(session);
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
as nothing really sets these keys up and they are probably preserverd
from some previous test, which is really not a good testing strategy.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The static sshd directory wasn't matching the detected sshd and prevented the testcases to be run against local OpenSSH builts
Signed-off-by: Aris Adamantiadis <aris@0xbadc0de.be>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Imports private and public keys from the engine via PKCS11 URIs. Uses
the imported keys to authenticate to the ssh server.
Signed-off-by: Sahana Prasad <sahana@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Libgcrypt has supported ChaCha20 and Poly1305 since 1.7.0 version and
provides fast assembler implementations.
v3:
- initialize pointers to NULL
- use 'bool' for chacha20_poly1305_keysched.initialized
- pass error codes from libgcrypt calls to variable
- add SSH_LOG on error paths
v2:
- use braces for one-line blocks
- use UNUSED_PARAM/UNUSED_VAR instead of cast to void
- use calloc instead of malloc+memset
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
v3:
- add tests for malformed encrypted inputs
v2:
- use proper size key for chacha20poly1305
- make copy of cleartext for chacha20poly1305 test-case
- update chacha20_encrypted
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Ensure that the `keylen` argument as provided to `EVP_PKEY_derive`
is initialized, otherwise depending on stack contents, the function
call may fail.
Fixes T205.
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Test if the file name is correctly escaped to avoid protocol message
injection.
Fixes T189
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
When pushing files or directories, encode the newlines contained in the
names as the string "\\n". This way the user cannot inject protocol
messages through the file name.
Fixes T189
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Given a string, the added function encodes existing newline characters
('\n') as the string "\\n" and puts into a given output buffer.
The output buffer must have at least 2 times the length of the input
string plus 1 for the terminating '\0'. In the worst case, each
character can be replaced by 2 characters.
Fixes T189
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This is a public struct and the version should be unsigned there.
Fixes T188
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Those are not marked as LIBSSH_API so not part of the public API and the
symbols aren't exported!
Fixes T188
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Single quote file paths to be used on commands to be executed on remote
shell.
Fixes T181
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The added function quote file names strings to be used in a shell.
Special cases are treated for the charactes '\'' and '!'.
Fixes T181
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Fixes T181
Previously, warnings received from the server were ignored. With this
change the warning message sent by the server will be logged.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Previously, there was non-consistent usage of constans SSH_KEX_METHODS,
KEX_METHODS_SIZE and of magic number 10 to reference the arrays used
for algorithm negotiation by peers. This commit settles down to the single
constant and its usage throughout the whole codebase.
Fixes T195
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
In ssh_session_new(), initialize the state machines states explicitly
for better readability.
Fixes T194
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
In ssh_message_new(), initialize msg->auth_request.signature_state
explicitly for better readability.
Fixes T194
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
In ssh_channel_new(), initialize channel->state and
channel->request_state explicitly for better readability.
Fixes T194
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
When a new ssh_auth_auto_state_struct is allocated in
ssh_userauth_publickey_auto(), initialize the state explicitly for
better readability.
Fixes T194
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Use the enum type instead of int in the ssh_session_struct
Fixes T194
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Use the enum type instead of char in the ssh_auth_request struct
Fixes T194
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Generally, when the extension negotiation is enabled and client supports
SHA2 algorithms for RSA, they are supposed to be prioritized against the
old SHA1. If it is not (ssh-rsa is listed in front of rsa-sha2-* hostkey
algorithms during negotiation), the server wrongly tries to provide the
new typo of signature, ignoring the negotiated algirithm
This commit propagates the digest algorithm from negotiation to the actual
signature functions, which were previously responsible for decision
about the hash algorithm based just on the negotiated extensions.
Fixes T191
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This is only compiled for tests and fuzzers!
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
We will honor BUILD_SHARED_LIBS from cmake next.
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
This is already part of LIBSSH_REQUIRED_LIBRARIES
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
It is possible for OpenSSL to have the type EVP_PKEY_ED25519 in
openssl/evp.h, but not the single shot functions EVP_DigestSign() and
EVP_DigestVerify() which are required to generate Ed25519 signatures.
Only switch to use OpenSSL Ed25519 implementation when OpenSSL have all
required types and functions.
Fixes: T197
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The added example is an application which can generate keys of different
types using libssh.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Debian removed the cross compiling toolchain. So lets drop it.
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Do not parse global config file in sessions created by
torture_ssh_session().
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This removes the tests which uses external configuration files. This
makes the tests no not change behaviour depending on the environment
they are being executed.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
In pkd tests, avoid processing the global server configuration file.
This is to allow testing with algorithms not allowed in the global
server configuration.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Do not process system-wide configuration when reinitializing a session
during testing. This could lead to different settings set from the
expected one (which was initialized during test setup).
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Previously, the tests were sharing the same file path to create the
known_hosts file, which can create a race condition if the tests run in
parallel. Such file was deleted between tests.
By using different different files for each test, the risk of race
conditions is eliminated. Moreover, it makes unnecessary to destroy the
file between tests.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
These functions modify the provided pointer by advancing to the end of
if (point to the byte after the last written). This makes the pointer
invalid, making necessary to use a temporary variable.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The implementation does not work on Windows, where it still reports unsupported
configuration option. On windows, separate code invoking subprocess needs to be
implemented.
Fixes T169
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
This adds support for Ed25519 keys from files in PEM format when using
OpenSSL with Ed25519 support. The default encoding for the PEM file is
expected to be PKCS#8. Encrypted files are supported.
For the lack of an API, it is not possible to export keys in PEM format,
only in OpenSSH format.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
If supported, use OpenSSL X25519 implementation for the curve25519 key
exchange.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This removes unused function pki_signature_verify()
from pki_{crypto, mbedcrypto, gcrypt}. The function was also removed
from include/libssh/pki_priv.h. The function ssh_pki_signature_verify()
was changed to receive a const unsigned char *input.
All tests calling pki_signature_verify() were changed to call
ssh_pki_signature_verify() instead.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Use OpenSSL to generate and verify Ed25519 signatures, if supported.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This is a preparation to use the Ed25519 implementation from OpenSSL.
The function pki_ed25519_sig_to_blob() was renamed to
pki_ed25519_signature_to_blob() and pki_ed25519_sig_from_blob() was
renamed to pki_signature_from_ed25519_blob() to follow the naming for
other algorithms.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Generate and verify Ed25519 signatures along with the other signature
types.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Verify the Ed25519 signature in pki_verify_data_signature() along with
the other signature types.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Use the newer APIs EVP_DigestSign{Init}() and EVP_DigestVerify{Init}()
to generate and verify signatures instead of the older EVP_Sign{Init,
Update, Final} and EVP_Verify{Init, Update, Final} if supported.
Also use the single shot signature/verification if supported as all the
input is provided at once.
This is a preparation to use Ed25519 implementation from OpenSSL.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This is required to avoid csbuild scan failures when a commit removes
source files. The command prep is run only once before all the builds,
making csbuild to try to compile the old files using the configuration
files generated for the newest version.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
With the old token parser, the data was simply broken on the = sign even
if the uri was in quotes and ignored.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
> note that keywords are case-insensitive and arguments are case-sensitive
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
In torture_threads_pki_rsa, skip the test which generates 1024 bits RSA
key pair when in FIPS mode.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Previously, if the path to known_hosts file set through
SSH_OPTIONS_KNOWNHOSTS included missing directories,
ssh_session_update_known_hosts() would fail. The added test case checks
that this is not the case anymore.
The logic of checking if the directory is accessible before creating it
was replaced by creating the directory if opening the file failed. This
is to minimize the risk of TOCTOU race conditions.
Fixes: T166
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
If the given path includes missing directories, ssh_mkdirs() tries to
create them recursively.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The introduced internal function checks if the provided path is for an
existing directory which is accessible for writing.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
For example "%d/config%%1" is expanded to "~/.ssh/config%1".
Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Replace all occurrences of the deprecated function ssh_print_hexa() with
the introduced ssh_log_hexdump().
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The introduced internal function is intended to be a replacement for the
deprecated function ssh_print_hexa().
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Try to find the OpenSSH private key header not only at the beginning of
the file. This makes the parser to skip comments and white spaces.
Fixes: T76
Fixes: T123
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This should stop detecting it as dead code.
CID 1402934
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
LibreSSL does not support FIPS mode, check for FIPS_mode() in
ConfigureChecks.cmake.
Signed-off-by: Stefan Strogin <steils@gentoo.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Previously, if the SSH_OPTIONS_HOSTKEYS option was set by any mean,
including the client configuration file, the keys in known_hosts files
wouldn't be considered before advertising the list of wanted host keys.
This could result in the client requesting the server to provide a
signature using a key not present in the known_hosts files (e.g. when
the first wanted algorithm in SSH_OPTIONS_HOSTKEYS is not present in the
known_hosts files), causing a host key mismatch and possible key
rejection.
Now, the keys present in the known_hosts files are prioritized over the
other wanted keys. This do not change the fact that only keys of types
present in the list set in SSH_OPTIONS_HOSTKEYS will be accepted and
prioritized following the order defined by such list.
The new wanted list of hostkeys is given by:
- The keys present in known_hosts files, ordered by preference defined
in SSH_OPTIONS_HOSTKEYS. If the option is not set, a default order
of preference is used.
- The other keys present in the same option are appended without adding
duplicates. If the option is not set, the default list of keys is
used.
Fixes: T156
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The added internal function obtain a newly allocated string containing a
list of the signature types that can be generated by the keys present in
the known_hosts files, separated by commas.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Added a function to remove duplicates from lists. This function is used
in a new provided function to append lists removing duplicates.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Avoid trying to open the files if they are not accessible. This was
already treated as a non-error, but with this we save one function call.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Make sure known hosts check works when local known_hosts file is
unaccessible, but the host is present in global known_hosts file.
Remove double return value check in previous existing test.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The memory allocated for host_port can leak if the global knownhosts
file is unaccessible.
Found by address sanitizer build in CI.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Verify that the check process will not fail if the global known_hosts
file is not accessible and the local known_hosts file contain the host.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Previously, if the global known_hosts file (default:
/etc/ssh/ssh_known_hosts) was inaccessible, the check for known hosts
failed. This makes the check to fail if both files are inaccessible.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The internal function ssh_connect_host() is not used.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
In non-blocking mode, it is expected SSH_AGAIN to be returned many
times. Do not flood the log with error messages.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The tests were disabled because of failures in torture_auth. The server
tests are not enabled because the pkd tests are failing.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
When we are talking to old OpenSSH versions which does not support
rsa-sha2-{256,512}-cert-v01@openssh.com or SHA2 in certificates,
fallback to old supported values.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This was introduced during fixes to run pkd tests in FIPS mode.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The test checks if the server handles unknown global requests properly.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Added a test case where invalid global requests are sent to the server
which should reject them, but not stop working.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
When the session is a client session, reject tcpip-forward requests.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
When an unknown global request is received, consume the message to avoid
sending UNIMPLEMENTED later. Only report the failure if the request
wants a reply.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The OpenSSH in RHEL 8 in FIPS Mode outputs information about this on start
and it needs to be skipped for the version detection (and build) to pass:
$ ssh -V
FIPS mode initialized
OpenSSH_8.0p1, OpenSSL 1.1.1c FIPS 28 May 2019
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Use uint32_t when expecting 32 bits unsigned int. Use PRIu32 macro to
print correctly independently of the architecture.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Do not use long long as equivalent as int64_t.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Don't use long unsigned int as equivalent as uint32_t. Use macros to
correctly print the values independently of the architecture.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
In torture_rekey_time(), "long long" was used instead of uint32_t. This
makes the test to fail in some architectures where the sizes don't match.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This also adds documentation for it.
Fixes T144
Signed-off-by: David Wedderwille <davidwe@posteo.de>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Added a build running in a Fedora image with crypto-policies set as FIPS
and forcing OpenSSL FIPS mode through environment variable.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
When running in FIPS mode, the OpenSSH version is not the first string
printed by "ssh -V". This makes the parser to find the first occurrence
of the version ignoring anything printed before it.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Use ssh_kex_get_fips_methods() instead of ssh_get_default_methods() if
in FIPS mode.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Previously the server in pkd tests would not accept certificates using
SHA2 in signatures.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Use only allowed algorithms in FIPS mode.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Do not use SHA1 in signatures in FIPS mode.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Also systematically use assert_ssh_return_code() instead of various
checks for return codes.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Skip tests requiring algorithms not allowed in FIPS mode.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Use only allowed algorithms if running in FIPS mode.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Use only allowed algorithms if in FIPS mode.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Skip tests using non allowed algorithms.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Use only allowed algorithms if in FIPS mode.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
When running in FIPS mode, skip the tests using algorithms not allowed.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Use a different OpenSSH configuration if running in FIPS mode, which
contains only allowed algorithms.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Previously, if the client supported rsa-sha2-256 or rsa-sha2-512, the
server would advertise the extensions as supported without checking its
own list of allowed algorithms. Now the server will only advertise
allowed signature algorithms.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Send only allowed algorithms in server-sig-algs extension if in FIPS
mode.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
There is actually a bug in OpenSSH's ssh-agent of handling these
requests [1], but this change follows the way how OpenSSH clients
behave in regards to the communication with agent.
Without this change, the agent is asked to provide SHA1 signature
with certificates, which is not right if we negotiated SHA2 extensions.
[1] https://bugzilla.mindrot.org/show_bug.cgi?id=3016
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
If in FIPS mode, skip tests which require algorithms not allowed. Also
use allowed algorithms when possible to avoid skipping the test.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Copies of the DSA, RSA, and ECDSA keys were added encoded in PKCS#8
format. For now, these keys are only used when testing with OpenSSL.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Make ssh_fallback_group() to duplicate the modulus and generator.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The macro is defined for each crypto back end. If (*dest) is NULL, a
new bignum is allocated. Otherwise the value of orig is copied to
(*dest).
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
When in FIPS mode, filter the algorithms to enable only the allowed
ones. If any algorithm is explicitly set through options or
configuration file, they are kept.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This allows the use of the new PKCS#8 PEM files and does not
limit libssh to using only the "traditional" PEM files, that
are not default in OpenSSL since 1.0.0 and which do not work
at all in FIPS mode.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Since OpenSSL 1.0.0, the "traditional" PEM format was deprecated
in favor of the PKCS#8 PEM files which is more standardized,
more secure and does not depend on the MD5 hash, which is not
available for example in FIPS mode.
This requires using the new EVP_PKEY API for reading private key
blobs.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Do not use MD5 when generating fingerprints in FIPS mode. The call will
fail in such case. The test suite was updated with a negative test for
this case.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Added a test to make sure unknown options in the configuration file are
ignored and don't make ssh_bind_options_parse_config() to fail.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Make ssh_bind_options_parse_config() to fail if setting a known option
fails. Previously the return value of ssh_bind_options_set() were
ignored when configuring the server through a configuration file.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Previously, when no methods were set, the server would enable all
supported methods. This changes this behaviour by setting only the
default methods.
The server in pkd_daemon.c was changed to set explicitly all the
supported methods to keep the previous behaviour.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The default order of preference for signature algorithms were not
consistent. This makes the following order of preference to be the
default order:
* ssh-ed25519
* ecdsa-sha2-nistp521
* ecdsa-sha2-nistp384
* ecdsa-sha2-nistp256
* rsa-sha2-512
* rsa-sha2-256
* ssh-rsa
* ssh-dss
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The added tests run the server with different combinations of algorithms
and try to connect using a client.
Note that few combinations are tested.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This allows testing the server with a configuration file. This also
adds an option for the stand-alone test server to skip parsing the
system-wide configuration file.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The added option SSH_BIND_OPTIONS_PROCESS_CONFIG allows to skip
processing the system-wide configuration file. The global configuration
file is processed automatically if this option is not set as false.
This option will only be effective if set before any call to
ssh_bind_options_parse_config().
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Add support for setting the allowed HostKey algorithms through
configuration file.
Note that this does NOT add support for adding or removing values using
'+' or '-'. Only replacing the whole list is supported.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The added option SSH_BIND_OPTIONS_HOSTKEY_ALGORITHMS allows restricting
the signature algorithms to offer to the client for host authentication.
The list set is used as a filter of allowed algorithms.
First a list of possible signature algorithms to offer is created from
the keys set and then such list is filtered against the allowed
algorithms.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Add support for setting the accepted public key types through
configuration file.
Note that this does NOT add support for adding or removing values using
'+' or '-'. Only replacing the whole list is supported.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The added option SSH_BIND_OPTIONS_PUBKEY_ACCEPTED_KEY_TYPES allows
restricting the allowed public key types accepted by the server for
authentication.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Replace the old tokens handling functions usage with the new implementation.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
The added functions allow splitting chains of tokens separated by a
given character (usually ','), and extracting matching parts between two
chains of tokens.
The previously existing functions in kex.c were replaced by the
introduced ones.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Previously when generating the signature in server side the key was
checked against the wrong list, potentially making the server to select
the wrong algorithm to sign (e.g. rsa-sha2-512 instead of rsa-sha2-256).
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This avoids csbuild failures due to new source files added. Previously
in some runs, csbuild would try to reuse the existing cmake cache file
which could contain added dependencies to new source files, leading to
failure in the run.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Do not print crypto debug information to reduce size of generated logs.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
They aren't needed and perhaps some compilers will issue "Unreachable
code" warnings.
Signed-off-by: Ramin Farajpour Cami <ramin.blackhat@gmail.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This makes sure the content will be zero after successful allocation.
Resolves T134
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
When using OpenSSL, the bignums generated during group exchange are
duplicated and don't transfer the memory management responsibility to
the back-end. The original generated bignums can be freed.
The leak was detectable by running:
$ valgrind --leak-check=full ./tests/pkd/pkd_hello -i1 \
-t torture_pkd_openssh_rsa_rsa_diffie_hellman_group_exchange_sha256
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The added option is an alias for the previously existing option
PubkeyAcceptedTypes.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This allows the global client (ssh_session) configuration file path to
be set in configuration time by defining GLOBAL_CLIENT_CONFIG when
calling cmake. If it is not defined, the default path is set as
"/etc/ssh/ssh_config".
usage example:
$ cmake -DGLOBAL_CLIENT_CONFIG=/etc/my/custom/path ..
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Do not allow using SSH_DIGEST_AUTO for any algorithm other than
ed25519.
Do not allow using incompatible hash algorithms when signing or
verifying signatures.
Added negative tests for all combinations of signature and hash
algorithms.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Previously in the tests the private key structure would be used for
signature verification. Use the corresponding public key instead.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
pki_sign_data() uses the given private key and hash algorithm to sign
the data using the OpenSSL EVP interface. The corresponding function
pki_verify_data_signature() receives the signature, the signed data, and
the public key to verify the signature.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Store the raw signature instead of the internal backend structure.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Store the raw signature instead of the internal backend structure.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This is a preparation to store the raw signature for all algorithms in
the same place in ssh_signature.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This makes pki_do_sign() and pki_signature_verify() to receive the
original input instead of the pre-calculated hash. The hash is then
calculated internally.
The hash to be used inside the signature is decided earlier, when all
the information about the signature to be generated/verified is
available.
Simplify ssh_pki_do_sign() and ssh_srv_pki_do_sign_sessionid().
The tests were modified to use pki_do_sign() instead of
pki_do_sign_hash().
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The goal here is to avoid errors due to fall through when
HAVE_OPENSSL_ECC is not defined.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Refactor pki_signature_to_blob() without behaviour changes.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The goal of this change is to make pki_signature_from_*_blob()
consistent.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Remove duplicate code previously used only in server side to generate
signatures. Currently the code used to generate the signature is the
same for both client and server.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Refactor ssh_srv_pki_do_sign_sessionid() without behaviour changes.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Added ECDSA key types to ssh_key_type_to_hash(). Refactor
ssh_pki_do_sign() without behaviour changes.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Upon SSH_OK, callers of `ssh_dh_keypair_set_keys` expect for ownership
of the `priv` and `pub` values to be transferred away and eventually
later managed by way of the `struct dh_ctx` at hand.
The mbedTLS and gcrypt builds transfer ownership of these values in
that way, but the libcrypto `ssh_dh_keypair_set_keys` is copying the
given values with `BN_dup`. This causes a memory leak that can be
seen with pkd and valgrind:
valgrind --leak-check=full \
./pkd_hello -i1 -t torture_pkd_openssh_dsa_rsa_diffie_hellman_group16_sha512
Fix the leak by replacing the `BN_dup` with direct assignment.
Now the bignums will eventually be freed via `ssh_dh_cleanup`.
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Ensure to free the `dh_ctx` member in `ssh_dh_cleanup` to match
the allocation in `ssh_dh_init_common`.
The before-and-after of this change can be observed with the pkd
tests and valgrind:
valgrind --leak-check=full \
./pkd_hello -i1 -t torture_pkd_openssh_dsa_rsa_diffie_hellman_group16_sha512
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Fix libssh server sending SSH_MSG_EXT_INFO messages upon rekey: clients
do not expect that message during rekey, and OpenSSH in particular will
log error messages along the lines of:
"kex protocol error: type 7 seq 15"
when the message is received during a rekey.
To fix, check against the session connected flag, which only transitions
to non-zero following the first successful authentication.
bf2c7128ab adds logic to resolve this
issue, but it turns out that checking the session_state to avoid
sending the message is insufficient, because that state is re-set
to SSH_SESSION_STATE_KEXINIT_RECEIVED during rekey.
The before-and-after effects of this change can be observed using the
pkd --rekey flag as so:
./pkd_hello -t torture_pkd_openssh_rsa_rsa_sha2_256 \
-i1 --rekey=16 -v -v -v 2>&1 |
grep -e 'KEY' -e 'EXT'
^ where before the change, multiple SSH_MSG_EXT_INFO send messages are
logged; after, there is only a single SSH_MSG_EXT_INFO logged once upon
the first initial key exchange.
Cross-reference: https://bugs.libssh.org/T121.
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Fix a bug with server-side rekeying where the session state at hand
has been toggled to SSH_SESSION_STATE_AUTHENTICATED before performing
the packet send of the SSH2_MSG_USERAUTH_SUCCESS message.
Before this change, what can happen is that during the packet send,
the SSH2_MSG_USERAUTH_SUCCESS message can end up being queued due
to a small rekey data limit value. libssh server will then proceed
to attempt to send KEX-related rekeying messages to the client before
the client has received USERAUTH_SUCCESS. OpenSSH clients do not
expect to undergo rekeying before having been authenticated, and so
will exit with error when this happens.
The behavior before and after can be observed with the pkd test making
use of its new --rekey flag:
./pkd_hello -t torture_pkd_openssh_rsa_rsa_default -i1 --rekey=16 -v -v -v
A new CMake test entry is added for the above variation and can be run
with:
ARGS="-R pkd_hello_rekey" make test
Before the fix, the test will fail; after, the test succeeds while
performing rekeying once every 16 bytes.
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Log an SSH_LOG_PACKET debug message when rekeying is necessary due to
the cipher max_blocks configuration.
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Support an optional --rekey input to set the SSH session rekey data
limit using SSH_OPTIONS_REKEY_DATA. This flag can be used together
with --buffer to test out server rekeying.
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Support an optional --buffer input for the pkd tests to enable testing
with a larger payload than the default "hello\n".
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Move the pkd test payload buffer into the arguments struct, to make
way for parameterizing the payload using command-line options.
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Summary:
* Note that SSH_ERROR can be returned on error in `ssh_channel_get_exit_status`
and `ssh_channel_get_session`.
* Note the return codes for `channel_open` and `grow_window`; although these
are internal APIs, it's best to document their behavior.
* Replace `@returns` use with `@return`. While Doxygen supports the
former as a synonym for `@return`, it isn't documented in the manual
(and might not be supported by other downstream documentation tools).
Signed-off-by: Enji Cooper <yaneurabeya@gmail.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Test Plan: n/a
Reviewers: #libssh, asn
Differential Revision: https://bugs.libssh.org/D15
A number of places checked that the signature type matched the key type. We
losen these checks to, for example, allow an RSA signature with an RSA-cert
key.
Signed-off-by: Ben Toews <mastahyeti@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Previously, we were just storing the raw certificate in ssh_key->cert. With
this change, we parse out the nonce string at the beginning of the certificate.
This leaves us with the certificate's public key at the start of the buffer.
The existing public key parsing code can then parse this out into the key fieds
of the ssh_key.
Signed-off-by: Ben Toews <mastahyeti@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
These tests are copied from the existing RSA/DSA certificate tests. They cover
importing certificates.
Signed-off-by: Ben Toews <mastahyeti@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
As with RSA/DSS, support is still quite limited. This is mostly about adding
new ssh_keytypes_e values and updating sites that check keys' types.
Signed-off-by: Ben Toews <mastahyeti@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This type is imprecise. We often need the ecdsa_nid in addition to the key type
in order to do anything. We replace this singluar ECDSA type with one type per
curve.
Signed-off-by: Ben Toews <mastahyeti@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Tests were failing to build on macOS with OpenSS installed using homebrew.
Signed-off-by: Ben Toews <mastahyeti@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
In preparation for adding crypto-libraries specific backends.
Signed-off-by: Simo Sorce <simo@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
In preparation for deferring computation on DH secret material to
crypto library specific backends
Signed-off-by: Simo Sorce <simo@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Rename and refactor how some variables are held in ssh_crypto_struct.
Refactor allocation of dh exchange public keys.
This is in preparation for switching the code to use openssl native DH
handling and allowed to better reason about the code and the overall API.
Signed-off-by: Simo Sorce <simo@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Adds test cases for the Match keyword for the bind options configuration
using a file.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Only "Match All" is supported, if any other criterion is used, the block
is ignored and the options are not applied.
It is important to note that only a subset of the supported keywords are
allowed to be used inside a Match block, currently being "LogLevel" the
only supported keyword.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Apply the global bind configuration from the file pointed by
BIND_GLOBAL_CONFIG when a bind_new() is called.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This allows the global bind configuration file path to be set in
configuration time by defining the GLOBAL_BIND_CONFIG when calling
cmake. If no value is defined, the default path is set as
"/etc/ssh/libssh_server_config".
usage example:
$ cmake -DGLOBAL_BIND_CONFIG=/etc/my/custom/path ..
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This adds the SSH_BIND_OPTIONS_CONFIG_DIR which allows to set the
directory used to expand the escape character "%d" when passing a path
to ssh_bind_options_parse_file().
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The added API allows setting the options of a given bind context through
a configuration file. The default global configuration file
"/etc/ssh/libssh_server_config" is parsed before the provided
configuration file, if it hasn't been parsed yet.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Introduced the support to set options for a given ssh_bind through a
configuration file.
For options set more than once in a single file (or by files included in it
recursively) the first value set will be kept.
Differently from the session options configuration,
if an option previously set in one configuration file is redefined in a
later processed file, the latest will be kept.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This will allow the moved functions to be used in the server side
configuration parser implementation.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This will make such buffer to be explicity overwritten with zeroes when
freed.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Addressing
client.c: In function ‘authenticate_pubkey’:
client.c:70:8: error: too few arguments to function ‘ssh_userauth_publickey_auto’
rc = ssh_userauth_publickey_auto(session, NULL);
^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from client.c:1:
/usr/include/libssh/libssh.h:745:16: note: declared here
LIBSSH_API int ssh_userauth_publickey_auto(ssh_session session,
^~~~~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Jan Pazdziora <jpazdziora@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Cleanup the KDF function to use only one function per crypto backend.
Improve the KDF function to properly handle requested lenght and to
avoid unnecessarily reallocating buffers.
In OpenSSL use the new EVP_KDF API if available.
Signed-off-by: Simo Sorce <simo@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This patch simply reworks the code to make it more understandable and
reduce if() branches.
It also avoids reallocs, and instead uses a support buffer to hold
intermediate results of the hmac function so that no buffer overrides
happen when the requested size is not an exact mutiple of the digest_len.
Signed-off-by: Simo Sorce <simo@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The zeroing MUST use the correct cipher length as keys can be both
longer or shorter than the digest. In one case only some part of the key
may end up being zeroed, in the other memory corruption may happen as
we zero memory we do not own.
Signed-off-by: Simo Sorce <simo@redhat.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This adds the OpenSSH HMACs that do encrypt then mac. This is a more
secure mode than the original HMAC. Newer AEAD ciphers like chacha20 and
AES-GCM are already encrypt-then-mac, but this also adds it for older
legacy clients that don't support those ciphers yet.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This adds a flag to the type structures to track if we use a
Encrypt-then-MAC cipher instead of Encrypt-and-MAC. EtM is a more secure
hashing mechanism.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This will make it easier to do Encrypt-then-MAC checks as those will be
on the direct encrypted data received before decrypting which means they
are not allocated in an ssh buffer at that point yet.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This is not supported by OpenSSH and not recommended to be implemented
either.
Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
src/pki_gcrypt.c:485:10: error: assuming signed overflow does not occur
when simplifying conditional to constant [-Werror=strict-overflow]
Fixes T132
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Buffer (un)packing was broken on compilers that are not
gcc-compatible since the checks for an argument count of
-1 have been removed from ssh_buffer_(un)pack(). This
fix no longer uses GCC extensions for the __VA_NARG__
macro, but only plain C99.
Note: The macro can no longer count empty argument lists
(results in compile error) which was not needed anyway.
Signed-off-by: Tilo Eckert <tilo.eckert@flam.de>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Ensure to honor the client preference ordering when enabling one of
the RFC8332 RSA signature extensions (`rsa-sha2-{256,512}`).
Before this change, libssh unconditionally selects the `rsa-sha2-512`
algorithm for clients which may have offered "rsa-sha2-256,rsa-sha2-512".
The change can be observed before-and-after with the pkd tests:
./pkd_hello -t torture_pkd_openssh_rsa_rsa_sha2_256_512
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Add four passes to the pkd tests to exercise codepaths where an
OpenSSH client requests these HostKeyAlgorithms combinations:
* rsa-sha2-256
* rsa-sha2-512
* rsa-sha2-256,rsa-sha2-512
* rsa-sha2-512,rsa-sha2-256
The tests demonstrate that the third combination currently fails:
libssh ends up choosing `rsa-sha2-512` instead of `rsa-sha2-256`,
and the initial exchange fails on the client side citing a signature
failure.
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
OpenSSH has a block size of 8 so we need to always add padding.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
In 3341f49a49, some direct assignments
to OpenSSL structures was replaced with usage of getter and setter
macros. Ensure to `bignum_safe_free` a couple of intermediate values
in error paths for `pki_signature_from_blob` DSS and ECDSA cases.
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Check for a potential NULL result from `pki_signature_from_rsa_blob`
in `pki_signature_from_blob`. Otherwise the following `sig->type_c`
will result in a segfault.
Introduced in 7f83a1efae.
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Harden the error path in 'ssh_dh_init_common' such that
all potential allocations are free'd upon exit.
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Ensure to `SSH_STRING_FREE` the pubkey_blob local in
`ssh_server_dh_process_init`. The leak can be seen with
valgrind and the pkd tests with:
valgrind \
--leak-check=full \
--show-leak-kinds=definite \
./pkd_hello -i1 -t torture_pkd_openssh_rsa_rsa_diffie_hellman_group14_sha1
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Fix a memory leak whereby the x, y, and k bignum fields within
a session's next_crypto structure were being unintentionally
initialized twice.
The leak can be seen before the fix with valgrind and the pkd
tests with:
valgrind \
--leak-check=full \
--show-leak-kinds=definite \
./pkd_hello -i1 -t torture_pkd_openssh_rsa_rsa_diffie_hellman_group_exchange_sha256
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Ensure to close the moduli file stream in `ssh_retrieve_dhgroup`.
The leak is observable with the pkd tests and valgrind with:
valgrind \
--track-fds=yes \
./pkd_hello -i1 \
-t torture_pkd_openssh_rsa_rsa_diffie_hellman_group_exchange_sha256
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This also replaces some occurrences of assert_true() with assert_null()
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This also replaces some occurrences of assert_true with assert_null.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The wrong conditional check for newly allocated memory would make the
function to fail when the allocation was successful and access invalid
memory when the allocation failed.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Commit c306a693f3 ("buffer: Use size_t for argc argument in
ssh_buffer_(un)pack()") mentioned unpack in the commit log, but it only
touches the pack variants. Extend the conversion to unpack.
Pre-initialize the p pointer to avoid possible use before
initialization in case of early argc check failure.
This fixes build failure:
.../libssh-0.8.6/src/buffer.c: In function 'ssh_buffer_unpack_va':
.../libssh-0.8.6/src/buffer.c:1229:16: error: assuming signed overflow does not occur when simplifying conditional to constant [-Werror=strict-overflow]
if (argc == -1){
^
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
There was no example of using a specific key for authentication so I added
one.
Signed-off-by: Eric Bentley <ebentley66@gmail.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
I noticed that there was no example showing server side public key encryption in the examples
so I added this one. I used authorizedkeys as a global to minimize the changes to the original
code as well as I was not sure the correct methodology of determining the .ssh directory location
for a user not using Linux. One code using the user parameter to determine the location to use
instead if desired.
Signed-off-by: Eric Bentley <ebentley66@gmail.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
Ensure most of the abstraction around the 3 libs are consistent.
Signed-off-by: Aris Adamantiadis <aris@0xbadc0de.be>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The default pubkey authentication callback is not checking
anything.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This makes easier to create test cases using callbacks based on the
default callbacks (e.g. using the default callbacks but replacing one
specific callback)
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This aims to make it easier to implement custom callbacks.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The server can be configured through command line options or by
providing a state structure with the desired values set.
Currently supports only password based authentication.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Error: CLANG_WARNING: tests/unittests/torture_threads_pki_rsa.c:520:5:
warning: 1st function call argument is an uninitialized value
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
RSA with SHA-256/512 signatures have been interpreted as RSA with SHA-1
Signed-off-by: Tilo Eckert <tilo.eckert@flam.de>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
By default, the list of already stored known host types is preferred,
but this selection so far ignored the SHA2 extension and excluded these
keys in the KEXINIT list leading to not using this extension if not
explicitly enabled from configuration.
This commit extends the default list with the SHA2 signatures algoritms
and compares only base types so they can be listed in the KEXINIT list.
This adjust the tests to expect the full list of algorithms to pass.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
If the server had an RSA host key, it provided unconditionally SHA2
signatures without consulting the client proposed list of supported host
keys.
This commit implements more fine-grained detection of the extension
to provide the client with valid signatures according to RFC 8332
Section 3.1.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The default rekeying recommendations are specified in
RFC4344 Section 3 (First and Second Rekeying Recommendations).
Additionally, the rekeying can be specified in configuration
file/options allowing us to turn the rekeying off, base it
on time or make it more strict.
The code is highly inspired by the OpenSSH rekeying code.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Daiki Ueno <dueno@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
And remove most of the direct access to the structure throughout the code
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Daiki Ueno <dueno@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
If the rekey is initialized by client, it sends the first KEXINIT
message, changes to the INIT_SENT state and waits for the KEXINIT
message from the server. This was not covered in the current filter.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Daiki Ueno <dueno@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This is more reliable fix than 83f2ac4a, which was failing for the
server initialized rekeying, because the session_state is altered
by receiving the KEXINIT from server.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
The ssh_options_copy() function was missing several options that were added
in recent years.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
When the server requests rekey, it can send the SSH2_MSG_EXT_INFO. This
message was being filtered out by the packet filtering. This includes a
test to enforce the filtering rules for this packet type.
Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This checks if a timeout has been set using ssh_options_set(). If it has
been set it will use that parametr by default for blocking sessions.
This is at least what users are expecting.
Fixes T33
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
2018-12-07 17:49:19 +01:00
338 changed files with 57839 additions and 14857 deletions
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