+#!/usr/bin/perl
+# Written by Matt Caswell for the OpenSSL project.
+# ====================================================================
+# Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in
+# the documentation and/or other materials provided with the
+# distribution.
+#
+# 3. All advertising materials mentioning features or use of this
+# software must display the following acknowledgment:
+# "This product includes software developed by the OpenSSL Project
+# for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+#
+# 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+# endorse or promote products derived from this software without
+# prior written permission. For written permission, please contact
+# openssl-core@openssl.org.
+#
+# 5. Products derived from this software may not be called "OpenSSL"
+# nor may "OpenSSL" appear in their names without prior written
+# permission of the OpenSSL Project.
+#
+# 6. Redistributions of any form whatsoever must retain the following
+# acknowledgment:
+# "This product includes software developed by the OpenSSL Project
+# for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+#
+# THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+# EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+# ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+# OF THE POSSIBILITY OF SUCH DAMAGE.
+# ====================================================================
+#
+# This product includes cryptographic software written by Eric Young
+# (eay@cryptsoft.com). This product includes software written by Tim
+# Hudson (tjh@cryptsoft.com).
+
+use strict;
+use OpenSSL::Test qw/:DEFAULT cmdstr top_file top_dir/;
+use TLSProxy::Proxy;
+
+my $test_name = "test_sslextension";
+setup($test_name);
+
+plan skip_all => "$test_name can only be performed with OpenSSL configured shared"
+ unless (map { chomp; s/^SHARED_LIBS=\s*//; $_ }
+ grep { /^SHARED_LIBS=/ }
+ do { local @ARGV = ( top_file("Makefile") ); <> })[0] ne "";
+
+$ENV{OPENSSL_ENGINES} = top_dir("engines");
+$ENV{OPENSSL_ia32cap} = '~0x200000200000000';
+my $proxy = TLSProxy::Proxy->new(
+ \&vers_tolerance_filter,
+ cmdstr(app(["openssl"])),
+ top_file("apps", "server.pem")
+);
+
+plan tests => 2;
+
+#Test 1: Asking for TLS1.3 should pass
+my $client_version = TLSProxy::Record::VERS_TLS_1_3;
+$proxy->start();
+ok(TLSProxy::Message->success(), "Version tolerance test, TLS 1.3");
+
+#Test 2: Testing something below SSLv3 should fail
+$client_version = TLSProxy::Record::VERS_SSL_3_0 - 1;
+$proxy->restart();
+ok(TLSProxy::Message->fail(), "Version tolerance test, SSL < 3.0");
+
+sub vers_tolerance_filter
+{
+ my $proxy = shift;
+
+ # We're only interested in the initial ClientHello
+ if ($proxy->flight != 0) {
+ return;
+ }
+
+ foreach my $message (@{$proxy->message_list}) {
+ if ($message->mt == TLSProxy::Message::MT_CLIENT_HELLO) {
+ #Set the client version
+ #Anything above the max supported version (TLS1.2) should succeed
+ #Anything below SSLv3 should fail
+ $message->client_version($client_version);
+ $message->repack();
+ }
+ }
+}