Support TLS_FALLBACK_SCSV.
Reviewed-by: Stephen Henson <steve@openssl.org>
diff --git a/ssl/s3_lib.c b/ssl/s3_lib.c
index bb1074c..d670ff0 100644
--- a/ssl/s3_lib.c
+++ b/ssl/s3_lib.c
@@ -3924,6 +3924,33 @@
return (int)sess->tlsext_ecpointformatlist_length;
}
#endif
+
+ case SSL_CTRL_CHECK_PROTO_VERSION:
+ /* For library-internal use; checks that the current protocol
+ * is the highest enabled version (according to s->ctx->method,
+ * as version negotiation may have changed s->method). */
+ if (s->version == s->ctx->method->version)
+ return 1;
+ /* Apparently we're using a version-flexible SSL_METHOD
+ * (not at its highest protocol version). */
+ if (s->ctx->method->version == SSLv23_method()->version)
+ {
+#if TLS_MAX_VERSION != TLS1_2_VERSION
+# error Code needs update for SSLv23_method() support beyond TLS1_2_VERSION.
+#endif
+ if (!(s->options & SSL_OP_NO_TLSv1_2))
+ return s->version == TLS1_2_VERSION;
+ if (!(s->options & SSL_OP_NO_TLSv1_1))
+ return s->version == TLS1_1_VERSION;
+ if (!(s->options & SSL_OP_NO_TLSv1))
+ return s->version == TLS1_VERSION;
+ if (!(s->options & SSL_OP_NO_SSLv3))
+ return s->version == SSL3_VERSION;
+ if (!(s->options & SSL_OP_NO_SSLv2))
+ return s->version == SSL2_VERSION;
+ }
+ return 0; /* Unexpected state; fail closed. */
+
default:
break;
}
@@ -4844,4 +4871,3 @@
return SSL_HANDSHAKE_MAC_SHA256 | TLS1_PRF_SHA256;
return alg2;
}
-
