1#! /usr/bin/env perl
2# Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
3#
4# Licensed under the Apache License 2.0 (the "License").  You may not use
5# this file except in compliance with the License.  You can obtain a copy
6# in the file LICENSE in the source distribution or at
7# https://www.openssl.org/source/license.html
8
9use strict;
10use OpenSSL::Test qw/:DEFAULT cmdstr srctop_file bldtop_dir/;
11use OpenSSL::Test::Utils;
12use TLSProxy::Proxy;
13
14my $test_name = "test_sslskewith0p";
15setup($test_name);
16
17plan skip_all => "TLSProxy isn't usable on $^O"
18    if $^O =~ /^(VMS)$/;
19
20plan skip_all => "$test_name needs the dynamic engine feature enabled"
21    if disabled("engine") || disabled("dynamic-engine");
22
23plan skip_all => "dh is not supported by this OpenSSL build"
24    if disabled("dh");
25
26plan skip_all => "$test_name needs the sock feature enabled"
27    if disabled("sock");
28
29plan skip_all => "$test_name needs TLS enabled"
30    if alldisabled(available_protocols("tls"));
31
32my $proxy = TLSProxy::Proxy->new(
33    \&ske_0_p_filter,
34    cmdstr(app(["openssl"]), display => 1),
35    srctop_file("apps", "server.pem"),
36    (!$ENV{HARNESS_ACTIVE} || $ENV{HARNESS_VERBOSE})
37);
38
39#We must use an anon DHE cipher for this test
40$proxy->cipherc('ADH-AES128-SHA:@SECLEVEL=0');
41$proxy->ciphers('ADH-AES128-SHA:@SECLEVEL=0');
42
43$proxy->clientflags("-no_tls1_3");
44$proxy->start() or plan skip_all => "Unable to start up Proxy for tests";
45plan tests => 1;
46ok(TLSProxy::Message->fail, "ServerKeyExchange with 0 p");
47
48sub ske_0_p_filter
49{
50    my $proxy = shift;
51
52    # We're only interested in the SKE - always in flight 1
53    if ($proxy->flight != 1) {
54        return;
55    }
56
57    foreach my $message (@{$proxy->message_list}) {
58        if ($message->mt == TLSProxy::Message::MT_SERVER_KEY_EXCHANGE) {
59            #Set p to a value of 0
60            $message->p(pack('C', 0));
61
62            $message->repack();
63        }
64    }
65}
66