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#! /usr/bin/env perl
# Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the Apache License 2.0 (the "License"). You may not use
# this file except in compliance with the License. You can obtain a copy
# in the file LICENSE in the source distribution or at
# https://www.openssl.org/source/license.html
use strict;
use OpenSSL::Test qw/:DEFAULT cmdstr srctop_file bldtop_dir/;
use OpenSSL::Test::Utils;
use TLSProxy::Proxy;
use File::Temp qw(tempfile);
use constant {
REVERSE_ORDER_VERSIONS => 1,
UNRECOGNISED_VERSIONS => 2,
NO_EXTENSION => 3,
EMPTY_EXTENSION => 4,
TLS1_1_AND_1_0_ONLY => 5,
WITH_TLS1_4 => 6,
BAD_LEGACY_VERSION => 7
};
my $testtype;
my $test_name = "test_sslversions";
setup($test_name);
plan skip_all => "TLSProxy isn't usable on $^O"
if $^O =~ /^(VMS)$/;
plan skip_all => "$test_name needs the dynamic engine feature enabled"
if disabled("engine") || disabled("dynamic-engine");
plan skip_all => "$test_name needs the sock feature enabled"
if disabled("sock");
plan skip_all => "$test_name needs TLS1.3, TLS1.2 and TLS1.1 enabled"
if disabled("tls1_3") || disabled("tls1_2") || disabled("tls1_1");
$ENV{OPENSSL_ia32cap} = '~0x200000200000000';
my $proxy = TLSProxy::Proxy->new(
undef,
cmdstr(app(["openssl"]), display => 1),
srctop_file("apps", "server.pem"),
(!$ENV{HARNESS_ACTIVE} || $ENV{HARNESS_VERBOSE})
);
#We're just testing various negative and unusual scenarios here. ssltest with
#02-protocol-version.cnf should check all the various combinations of normal
#version neg
#Test 1: An empty supported_versions extension should not succeed
$testtype = EMPTY_EXTENSION;
$proxy->filter(\&modify_supported_versions_filter);
$proxy->start() or plan skip_all => "Unable to start up Proxy for tests";
plan tests => 8;
ok(TLSProxy::Message->fail(), "Empty supported versions");
#Test 2: supported_versions extension with no recognised versions should not
#succeed
$proxy->clear();
$testtype = UNRECOGNISED_VERSIONS;
$proxy->start();
ok(TLSProxy::Message->fail(), "No recognised versions");
#Test 3: No supported versions extensions should succeed and select TLSv1.2
$proxy->clear();
$testtype = NO_EXTENSION;
$proxy->start();
my $record = pop @{$proxy->record_list};
ok(TLSProxy::Message->success()
&& $record->version() == TLSProxy::Record::VERS_TLS_1_2,
"No supported versions extension");
#Test 4: No supported versions extensions should fail if only TLS1.3 available
$proxy->clear();
$proxy->serverflags("-tls1_3");
$proxy->start();
ok(TLSProxy::Message->fail(), "No supported versions extension (only TLS1.3)");
#Test 5: supported versions extension with best version last should succeed
#and select TLSv1.3
$proxy->clear();
$testtype = REVERSE_ORDER_VERSIONS;
$proxy->start();
$record = pop @{$proxy->record_list};
ok(TLSProxy::Message->success()
&& $record->version() == TLSProxy::Record::VERS_TLS_1_2
&& TLSProxy::Proxy->is_tls13(),
"Reverse order versions");
#Test 6: no TLSv1.3 or TLSv1.2 version in supported versions extension, but
#TLSv1.1 and TLSv1.0 are present. Should just use TLSv1.1 and succeed
$proxy->clear();
$testtype = TLS1_1_AND_1_0_ONLY;
$proxy->start();
$record = pop @{$proxy->record_list};
ok(TLSProxy::Message->success()
&& $record->version() == TLSProxy::Record::VERS_TLS_1_1,
"TLS1.1 and TLS1.0 in supported versions extension only");
#Test 7: TLS1.4 and TLS1.3 in supported versions. Should succeed and use TLS1.3
$proxy->clear();
$testtype = WITH_TLS1_4;
$proxy->start();
$record = pop @{$proxy->record_list};
ok(TLSProxy::Message->success()
&& $record->version() == TLSProxy::Record::VERS_TLS_1_2
&& TLSProxy::Proxy->is_tls13(),
"TLS1.4 in supported versions extension");
#Test 8: Set the legacy version to SSLv3 with supported versions. Should fail
$proxy->clear();
$testtype = BAD_LEGACY_VERSION;
$proxy->start();
ok(TLSProxy::Message->fail(), "Legacy version is SSLv3 with supported versions");
sub modify_supported_versions_filter
{
my $proxy = shift;
if ($proxy->flight == 1) {
# Change the ServerRandom so that the downgrade sentinel doesn't cause
# the connection to fail
my $message = ${$proxy->message_list}[1];
return if (!defined $message);
$message->random("\0"x32);
$message->repack();
return;
}
# We're only interested in the initial ClientHello
if ($proxy->flight != 0) {
return;
}
foreach my $message (@{$proxy->message_list}) {
if ($message->mt == TLSProxy::Message::MT_CLIENT_HELLO) {
my $ext;
if ($testtype == REVERSE_ORDER_VERSIONS) {
$ext = pack "C5",
0x04, # Length
0x03, 0x03, #TLSv1.2
0x03, 0x04; #TLSv1.3
} elsif ($testtype == UNRECOGNISED_VERSIONS) {
$ext = pack "C5",
0x04, # Length
0x04, 0x04, #Some unrecognised version
0x04, 0x03; #Another unrecognised version
} elsif ($testtype == TLS1_1_AND_1_0_ONLY) {
$ext = pack "C5",
0x04, # Length
0x03, 0x02, #TLSv1.1
0x03, 0x01; #TLSv1.0
} elsif ($testtype == WITH_TLS1_4) {
$ext = pack "C5",
0x04, # Length
0x03, 0x05, #TLSv1.4
0x03, 0x04; #TLSv1.3
}
if ($testtype == REVERSE_ORDER_VERSIONS
|| $testtype == UNRECOGNISED_VERSIONS
|| $testtype == TLS1_1_AND_1_0_ONLY
|| $testtype == WITH_TLS1_4) {
$message->set_extension(
TLSProxy::Message::EXT_SUPPORTED_VERSIONS, $ext);
} elsif ($testtype == EMPTY_EXTENSION) {
$message->set_extension(
TLSProxy::Message::EXT_SUPPORTED_VERSIONS, "");
} elsif ($testtype == NO_EXTENSION) {
$message->delete_extension(
TLSProxy::Message::EXT_SUPPORTED_VERSIONS);
} else {
# BAD_LEGACY_VERSION
$message->client_version(TLSProxy::Record::VERS_SSL_3_0);
}
$message->repack();
}
}
}
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