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| author | Vitaly Chikunov <vt@altlinux.org> | 2018-08-02 00:03:06 +0300 |
|---|---|---|
| committer | Vitaly Chikunov <vt@altlinux.org> | 2018-08-02 01:18:05 +0300 |
| commit | 636dd0c1f36872f0abcb4f8a465e837929ed19d1 (patch) | |
| tree | e0332f14b008b6eacfce8b2c83e38d94d4d02c01 /gost_omac.c | |
| parent | ae390d45207aadb69eb96d8c11c1ee888f70815f (diff) | |
| download | gost-engine-636dd0c1f36872f0abcb4f8a465e837929ed19d1.zip gost-engine-636dd0c1f36872f0abcb4f8a465e837929ed19d1.tar.gz gost-engine-636dd0c1f36872f0abcb4f8a465e837929ed19d1.tar.bz2 | |
Fix EVP_MD_CTX_copy_ex for OMAC
Openssl copies a state between valid contexts. But, EVP_MD_CTX_copy_ex
just memcpy-s private data (md_data), which points to OMAC_CTX), which
have pointer to CMAC_CTX. Copying pointer makes CMAC context just the
same on the both sides. As a consequence, we can not do normal copy of a
state between CMAC contexts. As a fix, we just clone it if it's equal
between copy sides.
Reported-by: Gleb Fotengauer-Malinovskiy <glebfm@altlinux.org>
Diffstat (limited to 'gost_omac.c')
| -rw-r--r-- | gost_omac.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gost_omac.c b/gost_omac.c index c4e8111..af6eb2a 100644 --- a/gost_omac.c +++ b/gost_omac.c @@ -91,7 +91,7 @@ int omac_imit_copy(EVP_MD_CTX *to, const EVP_MD_CTX *from) } if (c_to->cmac_ctx == c_from->cmac_ctx) { - return 1; + c_to->cmac_ctx = CMAC_CTX_new(); } return CMAC_CTX_copy(c_to->cmac_ctx, c_from->cmac_ctx); } |