xref: /openssl/test/recipes/70-test_sslvertol.t (revision 39ed0745) 
1#! /usr/bin/env perl
2# Copyright 2015-2021 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 $test_name = "test_sslvertol";
15setup($test_name);
16
17plan skip_all => "TLSProxy isn't usable on $^O"
18    if $^O =~ /^(VMS)$/;
19
20plan skip_all => "$test_name needs the dynamic engine feature enabled"
21    if disabled("engine") || disabled("dynamic-engine");
22
23plan skip_all => "$test_name needs the sock feature enabled"
24    if disabled("sock");
25
26plan skip_all => "$test_name needs TLS enabled"
27    if alldisabled(available_protocols("tls"));
28
29my $proxy = TLSProxy::Proxy->new(
30    \&vers_tolerance_filter,
31    cmdstr(app(["openssl"]), display => 1),
32    srctop_file("apps", "server.pem"),
33    (!$ENV{HARNESS_ACTIVE} || $ENV{HARNESS_VERBOSE})
34);
35
36my @available_tls_versions = ();
37foreach (available_protocols("tls")) {
38    unless (disabled($_)) {
39        note("Checking enabled protocol $_");
40        m|^([a-z]+)(\d)(_\d)?|;
41        my $versionname;
42        if (defined $3) {
43            $versionname = 'TLSProxy::Record::VERS_'.uc($1).'_'.$2.$3;
44            note("'$1', '$2', '$3' => $versionname");
45        } else {
46            $versionname = 'TLSProxy::Record::VERS_'.uc($1).'_'.$2.'_0';
47            note("'$1', '$2' => $versionname");
48        }
49        push @available_tls_versions, eval $versionname;
50    }
51}
52note("TLS versions we can expect: ", join(", ", @available_tls_versions));
53
54#This file does tests without the supported_versions extension.
55#See 70-test_sslversions.t for tests with supported versions.
56
57#Test 1: Asking for TLS1.4 should pass and negotiate the maximum
58#available TLS version according to configuration below TLS1.3
59my $client_version = TLSProxy::Record::VERS_TLS_1_4;
60my $previous_version = tls_version_below(TLSProxy::Record::VERS_TLS_1_3);
61$proxy->clientflags("-no_tls1_3");
62$proxy->start() or plan skip_all => "Unable to start up Proxy for tests";
63plan tests => 3;
64SKIP: {
65    skip "There are too few protocols enabled for test 1", 1
66        unless defined $previous_version;
67
68    my $record = pop @{$proxy->record_list};
69    ok((note("Record version received: ".$record->version()),
70        TLSProxy::Message->success())
71       && $record->version() == $previous_version,
72       "Version tolerance test, below TLS 1.4 and not TLS 1.3");
73}
74
75#Test 2: Asking for TLS1.3 with that disabled should succeed and negotiate
76#the highest configured TLS version below that.
77$client_version = TLSProxy::Record::VERS_TLS_1_3;
78$previous_version = tls_version_below($client_version);
79SKIP: {
80    skip "There are too few protocols enabled for test 2", 1
81        unless defined $previous_version;
82
83    $proxy->clear();
84    $proxy->clientflags("-no_tls1_3");
85    $proxy->start();
86    my $record = pop @{$proxy->record_list};
87    ok((note("Record version received: ".$record->version()),
88        TLSProxy::Message->success())
89       && $record->version() == $previous_version,
90       "Version tolerance test, max version but not TLS 1.3");
91}
92
93#Test 3: Testing something below SSLv3 should fail.  We must disable TLS 1.3
94#to avoid having the 'supported_versions' extension kick in and override our
95#desires.
96$client_version = TLSProxy::Record::VERS_SSL_3_0 - 1;
97$proxy->clear();
98$proxy->clientflags("-no_tls1_3");
99$proxy->start();
100my $record = pop @{$proxy->record_list};
101ok((note("Record version received: ".
102         (defined $record ? $record->version() : "none")),
103    TLSProxy::Message->fail()),
104   "Version tolerance test, SSL < 3.0");
105
106sub vers_tolerance_filter
107{
108    my $proxy = shift;
109
110    # We're only interested in the initial ClientHello
111    if ($proxy->flight != 0) {
112        return;
113    }
114
115    foreach my $message (@{$proxy->message_list}) {
116        if ($message->mt == TLSProxy::Message::MT_CLIENT_HELLO) {
117            #Set the client version
118            #Anything above the max supported version should succeed
119            #Anything below SSLv3 should fail
120            $message->client_version($client_version);
121            $message->repack();
122        }
123    }
124}
125
126sub tls_version_below {
127    if (@_) {
128        my $term = shift;
129        my $res = undef;
130
131        foreach (@available_tls_versions) {
132            $res = $_ if $_ < $term;
133        }
134        return $res;
135    }
136    return $available_tls_versions[-1];
137}
138