eng_aesni.c: win32 fix.

[openssl.git] / ssl / s23_clnt.c

diff --git a/ssl/s23_clnt.c b/ssl/s23_clnt.c
index cc6c527f19fdcc9507e06682fc0d9dc2cfaffd7e..a71311e71645afca9ffd495db931eb19a99794aa 100644 (file)
--- a/ssl/s23_clnt.c
+++ b/ssl/s23_clnt.c
@@ -250,6 +250,20 @@ end:
        return(ret);
        }
 
+static int ssl23_no_ssl2_ciphers(SSL *s)
+       {
+       SSL_CIPHER *cipher;
+       STACK_OF(SSL_CIPHER) *ciphers;
+       int i;
+       ciphers = SSL_get_ciphers(s);
+       for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++)
+               {
+               cipher = sk_SSL_CIPHER_value(ciphers, i);
+               if (cipher->algorithm_ssl == SSL_SSLV2)
+                       return 0;
+               }
+       return 1;
+       }
 
 static int ssl23_client_hello(SSL *s)
        {
@@ -264,6 +278,9 @@ static int ssl23_client_hello(SSL *s)
 
        ssl2_compat = (s->options & SSL_OP_NO_SSLv2) ? 0 : 1;
 
+       if (ssl2_compat && ssl23_no_ssl2_ciphers(s))
+               ssl2_compat = 0;
+
        if (!(s->options & SSL_OP_NO_TLSv1))
                {
                version = TLS1_VERSION;
@@ -368,6 +385,10 @@ static int ssl23_client_hello(SSL *s)
                                ch_len=SSL2_MAX_CHALLENGE_LENGTH;
 
                        /* write out sslv2 challenge */
+                       /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32),
+                          because it is one of SSL2_MAX_CHALLENGE_LENGTH (32)
+                          or SSL2_MAX_CHALLENGE_LENGTH (16), but leave the
+                          check in for futurproofing */
                        if (SSL3_RANDOM_SIZE < ch_len)
                                i=SSL3_RANDOM_SIZE;
                        else
@@ -544,6 +565,10 @@ static int ssl23_get_server_hello(SSL *s)
                        ch_len=SSL2_MAX_CHALLENGE_LENGTH;
 
                /* write out sslv2 challenge */
+               /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because
+                  it is one of SSL2_MAX_CHALLENGE_LENGTH (32) or
+                  SSL2_MAX_CHALLENGE_LENGTH (16), but leave the check in for
+                  futurproofing */
                i=(SSL3_RANDOM_SIZE < ch_len)
                        ?SSL3_RANDOM_SIZE:ch_len;
                s->s2->challenge_length=i;