From: Dr. Stephen Henson <steve@openssl.org>
Date: Thu, 26 Jan 2017 17:39:48 +0000 (+0000)
Subject: Use correct signature algorithm list when sending or checking.
X-Git-Tag: OpenSSL_1_0_2l~109
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=e93f7d9c9873e8e9538c0be0b0d3b6851344dd6d;p=oweals%2Fopenssl.git

Use correct signature algorithm list when sending or checking.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2298)
---

diff --git a/ssl/s3_lib.c b/ssl/s3_lib.c
index 0385e039c8..1014a3fce1 100644
--- a/ssl/s3_lib.c
+++ b/ssl/s3_lib.c
@@ -4237,7 +4237,7 @@ int ssl3_get_req_cert_type(SSL *s, unsigned char *p)
         return (int)s->cert->ctype_num;
     }
     /* get configured sigalgs */
-    siglen = tls12_get_psigalgs(s, &sig);
+    siglen = tls12_get_psigalgs(s, 1, &sig);
     if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT)
         nostrict = 0;
     for (i = 0; i < siglen; i += 2, sig += 2) {
diff --git a/ssl/s3_srvr.c b/ssl/s3_srvr.c
index ea56f9ca81..e5ee384593 100644
--- a/ssl/s3_srvr.c
+++ b/ssl/s3_srvr.c
@@ -2084,7 +2084,7 @@ int ssl3_send_certificate_request(SSL *s)
 
         if (SSL_USE_SIGALGS(s)) {
             const unsigned char *psigs;
-            nl = tls12_get_psigalgs(s, &psigs);
+            nl = tls12_get_psigalgs(s, 1, &psigs);
             s2n(nl, p);
             memcpy(p, psigs, nl);
             p += nl;
diff --git a/ssl/ssl_locl.h b/ssl/ssl_locl.h
index d50edd18c9..f582d5f06f 100644
--- a/ssl/ssl_locl.h
+++ b/ssl/ssl_locl.h
@@ -1430,7 +1430,7 @@ int ssl_parse_clienthello_renegotiate_ext(SSL *s, unsigned char *d, int len,
 long ssl_get_algorithm2(SSL *s);
 int tls1_save_sigalgs(SSL *s, const unsigned char *data, int dsize);
 int tls1_process_sigalgs(SSL *s);
-size_t tls12_get_psigalgs(SSL *s, const unsigned char **psigs);
+size_t tls12_get_psigalgs(SSL *s, int sent, const unsigned char **psigs);
 int tls12_check_peer_sigalg(const EVP_MD **pmd, SSL *s,
                             const unsigned char *sig, EVP_PKEY *pkey);
 void ssl_set_client_disabled(SSL *s);
diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c
index e60c88bd5b..5355f0ee11 100644
--- a/ssl/t1_lib.c
+++ b/ssl/t1_lib.c
@@ -1035,7 +1035,7 @@ static unsigned char suiteb_sigalgs[] = {
         tlsext_sigalg_ecdsa(TLSEXT_hash_sha384)
 };
 # endif
-size_t tls12_get_psigalgs(SSL *s, const unsigned char **psigs)
+size_t tls12_get_psigalgs(SSL *s, int sent, const unsigned char **psigs)
 {
     /*
      * If Suite B mode use Suite B sigalgs only, ignore any other
@@ -1057,7 +1057,7 @@ size_t tls12_get_psigalgs(SSL *s, const unsigned char **psigs)
     }
 # endif
     /* If server use client authentication sigalgs if not NULL */
-    if (s->server && s->cert->client_sigalgs) {
+    if (s->server == sent && s->cert->client_sigalgs) {
         *psigs = s->cert->client_sigalgs;
         return s->cert->client_sigalgslen;
     } else if (s->cert->conf_sigalgs) {
@@ -1121,7 +1121,7 @@ int tls12_check_peer_sigalg(const EVP_MD **pmd, SSL *s,
 # endif
 
     /* Check signature matches a type we sent */
-    sent_sigslen = tls12_get_psigalgs(s, &sent_sigs);
+    sent_sigslen = tls12_get_psigalgs(s, 1, &sent_sigs);
     for (i = 0; i < sent_sigslen; i += 2, sent_sigs += 2) {
         if (sig[0] == sent_sigs[0] && sig[1] == sent_sigs[1])
             break;
@@ -1169,7 +1169,7 @@ void ssl_set_client_disabled(SSL *s)
      * Now go through all signature algorithms seeing if we support any for
      * RSA, DSA, ECDSA. Do this for all versions not just TLS 1.2.
      */
-    sigalgslen = tls12_get_psigalgs(s, &sigalgs);
+    sigalgslen = tls12_get_psigalgs(s, 1, &sigalgs);
     for (i = 0; i < sigalgslen; i += 2, sigalgs += 2) {
         switch (sigalgs[1]) {
 # ifndef OPENSSL_NO_RSA
@@ -1440,7 +1440,7 @@ unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *buf,
     if (SSL_CLIENT_USE_SIGALGS(s)) {
         size_t salglen;
         const unsigned char *salg;
-        salglen = tls12_get_psigalgs(s, &salg);
+        salglen = tls12_get_psigalgs(s, 1, &salg);
 
         /*-
          * check for enough space.
@@ -3803,7 +3803,7 @@ static int tls1_set_shared_sigalgs(SSL *s)
         conf = c->conf_sigalgs;
         conflen = c->conf_sigalgslen;
     } else
-        conflen = tls12_get_psigalgs(s, &conf);
+        conflen = tls12_get_psigalgs(s, 0, &conf);
     if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE || is_suiteb) {
         pref = conf;
         preflen = conflen;