From: Dr. Stephen Henson <steve@openssl.org>
Date: Thu, 26 Jan 2017 17:11:14 +0000 (+0000)
Subject: Use correct signature algorithm list when sending or checking.
X-Git-Tag: OpenSSL_1_1_0e~49
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=3f60b8fbdc9b17572a86457fe5b11437c0d3fbc2;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/2297)
---

diff --git a/ssl/ssl_locl.h b/ssl/ssl_locl.h
index 4079b31637..9a997cfb83 100644
--- a/ssl/ssl_locl.h
+++ b/ssl/ssl_locl.h
@@ -2062,7 +2062,7 @@ __owur size_t tls12_copy_sigalgs(SSL *s, unsigned char *out,
                                  const unsigned char *psig, size_t psiglen);
 __owur int tls1_save_sigalgs(SSL *s, const unsigned char *data, int dsize);
 __owur int tls1_process_sigalgs(SSL *s);
-__owur size_t tls12_get_psigalgs(SSL *s, const unsigned char **psigs);
+__owur size_t tls12_get_psigalgs(SSL *s, int sent, const unsigned char **psigs);
 __owur 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/statem/statem_srvr.c b/ssl/statem/statem_srvr.c
index d36d194b0a..ad89e93b1e 100644
--- a/ssl/statem/statem_srvr.c
+++ b/ssl/statem/statem_srvr.c
@@ -2002,7 +2002,7 @@ int tls_construct_certificate_request(SSL *s)
     if (SSL_USE_SIGALGS(s)) {
         const unsigned char *psigs;
         unsigned char *etmp = p;
-        nl = tls12_get_psigalgs(s, &psigs);
+        nl = tls12_get_psigalgs(s, 1, &psigs);
         /* Skip over length for now */
         p += 2;
         nl = tls12_copy_sigalgs(s, p, psigs, nl);
diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c
index 1205f993bc..b75e568925 100644
--- a/ssl/t1_lib.c
+++ b/ssl/t1_lib.c
@@ -711,7 +711,7 @@ static const 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
@@ -733,7 +733,7 @@ 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) {
@@ -797,7 +797,7 @@ 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;
@@ -1189,7 +1189,7 @@ unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *buf,
         size_t salglen;
         const unsigned char *salg;
         unsigned char *etmp;
-        salglen = tls12_get_psigalgs(s, &salg);
+        salglen = tls12_get_psigalgs(s, 1, &salg);
 
         /*-
          * check for enough space.
@@ -3396,7 +3396,7 @@ void ssl_set_sig_mask(uint32_t *pmask_a, SSL *s, int op)
      * RSA, DSA, ECDSA. Do this for all versions not just TLS 1.2. To keep
      * down calls to security callback only check if we have to.
      */
-    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
@@ -3491,7 +3491,7 @@ 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;