PR: 2240

Submitted by: Jack Lloyd <lloyd@randombit.net>, "Mounir IDRASSI" <mounir.idrassi@idrix.net>, steve
Reviewed by: steve

As required by RFC4492 an absent supported points format by a server is
not an error: it should be treated as equivalent to an extension only
containing uncompressed.

diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c
index 2b90d471e45012d1915eae7f4cca03bf971f7cba..4efa20af2d486d047f551eb6ea9480da4cbf4144 100644 (file)
--- a/ssl/t1_lib.c
+++ b/ssl/t1_lib.c
@@ -1452,23 +1452,20 @@ int ssl_check_serverhello_tlsext(SSL *s)
        int al = SSL_AD_UNRECOGNIZED_NAME;
 
 #ifndef OPENSSL_NO_EC
-       /* If we are client and using an elliptic curve cryptography cipher suite, then server
-        * must return a an EC point formats lists containing uncompressed.
+       /* If we are client and using an elliptic curve cryptography cipher
+        * suite, then if server returns an EC point formats lists extension
+        * it must contain uncompressed.
         */
        unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
        unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
        if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) && 
+           (s->session->tlsext_ecpointformatlist != NULL) && (s->session->tlsext_ecpointformatlist_length > 0) && 
            ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA)))
                {
                /* we are using an ECC cipher */
                size_t i;
                unsigned char *list;
                int found_uncompressed = 0;
-               if ((s->session->tlsext_ecpointformatlist == NULL) || (s->session->tlsext_ecpointformatlist_length == 0))
-                       {
-                       SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
-                       return -1;
-                       }
                list = s->session->tlsext_ecpointformatlist;
                for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
                        {