For more than 160 bits of security disable SHA1 HMAC

openssl · Apr 5, 2014 · f8dd55b · f8dd55b
1 parent b7e46a9
commit f8dd55b
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/ssl/ssl_cert.c b/ssl/ssl_cert.c
@@ -1411,6 +1411,9 @@ static int ssl_security_default_callback(SSL *s, SSL_CTX *ctx, int op, int bits,
 		/* No MD5 mac ciphersuites */
 		if (c->algorithm_mac & SSL_MD5)
 			return 0;
+		/* SHA1 HMAC is 160 bits of security */
+		if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
+			return 0;
 		/* Level 2: no RC4 */
 		if (level >= 2 && c->algorithm_enc == SSL_RC4)
 			return 0;