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| author | Simon Josefsson <simon@josefsson.org> | 2006-12-27 20:31:57 +0000 |
|---|---|---|
| committer | Simon Josefsson <simon@josefsson.org> | 2006-12-27 20:31:57 +0000 |
| commit | 8fd2854b3b438492ae5762e330f63ea130dc4bc8 (patch) | |
| tree | 55ddbc58450fcb24de3623df3915e87473b35517 /lib | |
| parent | 07565d8defa6c7be7d3f97218f1472c689635e55 (diff) | |
| download | gnutls-8fd2854b3b438492ae5762e330f63ea130dc4bc8.tar.gz | |
Fix signature verification for DSA signatures in TLS 1.2, reported by
ludovic.courtes@laas.fr (Ludovic Courtès).
(_gnutls_pkcs1_rsa_verify_sig): Rename to _gnutls_verify_sig, and add
new parameter SHA1POS to indicate where in hash_concat the SHA.1 hash
is stored (for DSA).
(_gnutls_verify_sig_hdata): Pass proper SHA1POS.
(_gnutls_verify_sig_params): Likewise.
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/gnutls_sig.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/lib/gnutls_sig.c b/lib/gnutls_sig.c index c930db77eb..eba2a39703 100644 --- a/lib/gnutls_sig.c +++ b/lib/gnutls_sig.c @@ -259,9 +259,10 @@ _gnutls_tls_sign (gnutls_cert * cert, gnutls_privkey * pkey, static int -_gnutls_pkcs1_rsa_verify_sig (gnutls_cert * cert, - const gnutls_datum_t * hash_concat, - gnutls_datum_t * signature) +_gnutls_verify_sig (gnutls_cert * cert, + const gnutls_datum_t * hash_concat, + gnutls_datum_t * signature, + size_t sha1pos) { int ret; gnutls_datum_t vdata; @@ -302,7 +303,7 @@ _gnutls_pkcs1_rsa_verify_sig (gnutls_cert * cert, break; case GNUTLS_PK_DSA: - vdata.data = &hash_concat->data[16]; + vdata.data = &hash_concat->data[sha1pos]; vdata.size = 20; /* sha1 */ /* verify signature */ @@ -380,7 +381,7 @@ _gnutls_verify_sig_hdata (gnutls_session_t session, gnutls_cert * cert, dconcat.data = concat; dconcat.size = 20 + 16; /* md5+ sha */ - ret = _gnutls_pkcs1_rsa_verify_sig (cert, &dconcat, signature); + ret = _gnutls_verify_sig (cert, &dconcat, signature, 16); if (ret < 0) { gnutls_assert (); @@ -461,7 +462,7 @@ _gnutls_verify_sig_params (gnutls_session_t session, gnutls_cert * cert, dconcat.data = concat; - ret = _gnutls_pkcs1_rsa_verify_sig (cert, &dconcat, signature); + ret = _gnutls_verify_sig (cert, &dconcat, signature, dconcat.size - 20); if (ret < 0) { gnutls_assert (); |