diff options
Diffstat (limited to 'ssl')
| -rw-r--r-- | ssl/t1_lib.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c index abf523e49c..3c7590c31f 100644 --- a/ssl/t1_lib.c +++ b/ssl/t1_lib.c @@ -1519,9 +1519,50 @@ static int tls12_sigalg_allowed(SSL *s, int op, const SIGALG_LOOKUP *lu) || lu->hash_idx == SSL_MD_MD5_IDX || lu->hash_idx == SSL_MD_SHA224_IDX)) return 0; + /* See if public key algorithm allowed */ if (ssl_cert_is_disabled(lu->sig_idx)) return 0; + + if (lu->sig == NID_id_GostR3410_2012_256 + || lu->sig == NID_id_GostR3410_2012_512 + || lu->sig == NID_id_GostR3410_2001) { + /* We never allow GOST sig algs on the server with TLSv1.3 */ + if (s->server && SSL_IS_TLS13(s)) + return 0; + if (!s->server + && s->method->version == TLS_ANY_VERSION + && s->s3->tmp.max_ver >= TLS1_3_VERSION) { + int i, num; + STACK_OF(SSL_CIPHER) *sk; + + /* + * We're a client that could negotiate TLSv1.3. We only allow GOST + * sig algs if we could negotiate TLSv1.2 or below and we have GOST + * ciphersuites enabled. + */ + + if (s->s3->tmp.min_ver >= TLS1_3_VERSION) + return 0; + + sk = SSL_get_ciphers(s); + num = sk != NULL ? sk_SSL_CIPHER_num(sk) : 0; + for (i = 0; i < num; i++) { + const SSL_CIPHER *c; + + c = sk_SSL_CIPHER_value(sk, i); + /* Skip disabled ciphers */ + if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) + continue; + + if ((c->algorithm_mkey & SSL_kGOST) != 0) + break; + } + if (i == num) + return 0; + } + } + if (lu->hash == NID_undef) return 1; /* Security bits: half digest bits */ |