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libgcrypt: Implement chacha20-poly1305@openssh.com cipher using libgcrypt

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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>
This commit is contained in:
Jussi Kivilinna
2019-11-25 23:04:09 +02:00
parent af5de2d37e
commit de4b8f88a2
3 changed files with 348 additions and 1 deletions
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3
config.h.cmake
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@@ -103,6 +103,9 @@
/* Define to 1 if you have OpenSSL with X25519 support */
#cmakedefine HAVE_OPENSSL_X25519 1
/* Define to 1 if you have gcrypt with ChaCha20/Poly1305 support */
#cmakedefine HAVE_GCRYPT_CHACHA_POLY 1
/*************************** FUNCTIONS ***************************/
/* Define to 1 if you have the `EVP_aes128_ctr' function. */