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; 13use File::Temp qw(tempfile); 14 15use constant { 16 REVERSE_ORDER_VERSIONS => 1, 17 UNRECOGNISED_VERSIONS => 2, 18 NO_EXTENSION => 3, 19 EMPTY_EXTENSION => 4, 20 TLS1_1_AND_1_0_ONLY => 5, 21 WITH_TLS1_4 => 6, 22 BAD_LEGACY_VERSION => 7 23}; 24 25my $testtype; 26 27my $test_name = "test_sslversions"; 28setup($test_name); 29 30plan skip_all => "TLSProxy isn't usable on $^O" 31 if $^O =~ /^(VMS)$/; 32 33plan skip_all => "$test_name needs the dynamic engine feature enabled" 34 if disabled("engine") || disabled("dynamic-engine"); 35 36plan skip_all => "$test_name needs the sock feature enabled" 37 if disabled("sock"); 38 39plan skip_all => "$test_name needs TLS1.3, TLS1.2 and TLS1.1 enabled" 40 if disabled("tls1_3") 41 || (disabled("ec") && disabled("dh")) 42 || disabled("tls1_2") 43 || disabled("tls1_1"); 44 45my $proxy = TLSProxy::Proxy->new( 46 undef, 47 cmdstr(app(["openssl"]), display => 1), 48 srctop_file("apps", "server.pem"), 49 (!$ENV{HARNESS_ACTIVE} || $ENV{HARNESS_VERBOSE}) 50); 51 52#We're just testing various negative and unusual scenarios here. ssltest with 53#02-protocol-version.cnf should check all the various combinations of normal 54#version neg 55 56#Test 1: An empty supported_versions extension should not succeed 57$testtype = EMPTY_EXTENSION; 58$proxy->filter(\&modify_supported_versions_filter); 59$proxy->start() or plan skip_all => "Unable to start up Proxy for tests"; 60plan tests => 8; 61ok(TLSProxy::Message->fail(), "Empty supported versions"); 62 63#Test 2: supported_versions extension with no recognised versions should not 64#succeed 65$proxy->clear(); 66$testtype = UNRECOGNISED_VERSIONS; 67$proxy->start(); 68ok(TLSProxy::Message->fail(), "No recognised versions"); 69 70#Test 3: No supported versions extensions should succeed and select TLSv1.2 71$proxy->clear(); 72$testtype = NO_EXTENSION; 73$proxy->start(); 74my $record = pop @{$proxy->record_list}; 75ok(TLSProxy::Message->success() 76 && $record->version() == TLSProxy::Record::VERS_TLS_1_2, 77 "No supported versions extension"); 78 79#Test 4: No supported versions extensions should fail if only TLS1.3 available 80$proxy->clear(); 81$proxy->serverflags("-tls1_3"); 82$proxy->start(); 83ok(TLSProxy::Message->fail(), "No supported versions extension (only TLS1.3)"); 84 85#Test 5: supported versions extension with best version last should succeed 86#and select TLSv1.3 87$proxy->clear(); 88$testtype = REVERSE_ORDER_VERSIONS; 89$proxy->start(); 90$record = pop @{$proxy->record_list}; 91ok(TLSProxy::Message->success() 92 && $record->version() == TLSProxy::Record::VERS_TLS_1_2 93 && TLSProxy::Proxy->is_tls13(), 94 "Reverse order versions"); 95 96#Test 6: no TLSv1.3 or TLSv1.2 version in supported versions extension, but 97#TLSv1.1 and TLSv1.0 are present. Should just use TLSv1.1 and succeed 98$proxy->clear(); 99$proxy->clientflags("-cipher DEFAULT:\@SECLEVEL=0"); 100$proxy->ciphers("AES128-SHA:\@SECLEVEL=0"); 101$testtype = TLS1_1_AND_1_0_ONLY; 102$proxy->start(); 103$record = pop @{$proxy->record_list}; 104ok(TLSProxy::Message->success() 105 && $record->version() == TLSProxy::Record::VERS_TLS_1_1, 106 "TLS1.1 and TLS1.0 in supported versions extension only"); 107 108#Test 7: TLS1.4 and TLS1.3 in supported versions. Should succeed and use TLS1.3 109$proxy->clear(); 110$testtype = WITH_TLS1_4; 111$proxy->start(); 112$record = pop @{$proxy->record_list}; 113ok(TLSProxy::Message->success() 114 && $record->version() == TLSProxy::Record::VERS_TLS_1_2 115 && TLSProxy::Proxy->is_tls13(), 116 "TLS1.4 in supported versions extension"); 117 118#Test 8: Set the legacy version to SSLv3 with supported versions. Should fail 119$proxy->clear(); 120$testtype = BAD_LEGACY_VERSION; 121$proxy->start(); 122ok(TLSProxy::Message->fail(), "Legacy version is SSLv3 with supported versions"); 123 124sub modify_supported_versions_filter 125{ 126 my $proxy = shift; 127 128 if ($proxy->flight == 1) { 129 # Change the ServerRandom so that the downgrade sentinel doesn't cause 130 # the connection to fail 131 my $message = ${$proxy->message_list}[1]; 132 return if (!defined $message); 133 134 $message->random("\0"x32); 135 $message->repack(); 136 return; 137 } 138 139 # We're only interested in the initial ClientHello 140 if ($proxy->flight != 0) { 141 return; 142 } 143 144 foreach my $message (@{$proxy->message_list}) { 145 if ($message->mt == TLSProxy::Message::MT_CLIENT_HELLO) { 146 my $ext; 147 if ($testtype == REVERSE_ORDER_VERSIONS) { 148 $ext = pack "C5", 149 0x04, # Length 150 0x03, 0x03, #TLSv1.2 151 0x03, 0x04; #TLSv1.3 152 } elsif ($testtype == UNRECOGNISED_VERSIONS) { 153 $ext = pack "C5", 154 0x04, # Length 155 0x04, 0x04, #Some unrecognised version 156 0x04, 0x03; #Another unrecognised version 157 } elsif ($testtype == TLS1_1_AND_1_0_ONLY) { 158 $ext = pack "C5", 159 0x04, # Length 160 0x03, 0x02, #TLSv1.1 161 0x03, 0x01; #TLSv1.0 162 } elsif ($testtype == WITH_TLS1_4) { 163 $ext = pack "C5", 164 0x04, # Length 165 0x03, 0x05, #TLSv1.4 166 0x03, 0x04; #TLSv1.3 167 } 168 if ($testtype == REVERSE_ORDER_VERSIONS 169 || $testtype == UNRECOGNISED_VERSIONS 170 || $testtype == TLS1_1_AND_1_0_ONLY 171 || $testtype == WITH_TLS1_4) { 172 $message->set_extension( 173 TLSProxy::Message::EXT_SUPPORTED_VERSIONS, $ext); 174 } elsif ($testtype == EMPTY_EXTENSION) { 175 $message->set_extension( 176 TLSProxy::Message::EXT_SUPPORTED_VERSIONS, ""); 177 } elsif ($testtype == NO_EXTENSION) { 178 $message->delete_extension( 179 TLSProxy::Message::EXT_SUPPORTED_VERSIONS); 180 } else { 181 # BAD_LEGACY_VERSION 182 $message->client_version(TLSProxy::Record::VERS_SSL_3_0); 183 } 184 185 $message->repack(); 186 } 187 } 188} 189