270 lines
8.3 KiB
Perl
270 lines
8.3 KiB
Perl
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#! /usr/bin/env perl
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# Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved.
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#
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# Licensed under the Apache License 2.0 (the "License"). You may not use
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# this file except in compliance with the License. You can obtain a copy
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# in the file LICENSE in the source distribution or at
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# https://www.openssl.org/source/license.html
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use strict;
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use feature 'state';
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use OpenSSL::Test qw/:DEFAULT cmdstr srctop_file bldtop_dir/;
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use OpenSSL::Test::Utils;
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use TLSProxy::Proxy;
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my $test_name = "test_sslextension";
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setup($test_name);
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plan skip_all => "TLSProxy isn't usable on $^O"
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if $^O =~ /^(VMS)$/;
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plan skip_all => "$test_name needs the dynamic engine feature enabled"
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if disabled("engine") || disabled("dynamic-engine");
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plan skip_all => "$test_name needs the sock feature enabled"
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if disabled("sock");
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plan skip_all => "$test_name needs TLS enabled"
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if alldisabled(available_protocols("tls"));
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my $no_below_tls13 = alldisabled(("tls1", "tls1_1", "tls1_2"))
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|| (!disabled("tls1_3") && disabled("tls1_2"));
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use constant {
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UNSOLICITED_SERVER_NAME => 0,
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UNSOLICITED_SERVER_NAME_TLS13 => 1,
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UNSOLICITED_SCT => 2,
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NONCOMPLIANT_SUPPORTED_GROUPS => 3
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};
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my $testtype;
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my $fatal_alert = 0; # set by filter on fatal alert
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my $proxy = TLSProxy::Proxy->new(
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\&inject_duplicate_extension_clienthello,
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cmdstr(app(["openssl"]), display => 1),
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srctop_file("apps", "server.pem"),
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(!$ENV{HARNESS_ACTIVE} || $ENV{HARNESS_VERBOSE})
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);
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sub extension_filter
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{
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my $proxy = shift;
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if ($proxy->flight == 1) {
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# Change the ServerRandom so that the downgrade sentinel doesn't cause
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# the connection to fail
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my $message = ${$proxy->message_list}[1];
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$message->random("\0"x32);
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$message->repack();
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return;
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}
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# We're only interested in the initial ClientHello
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if ($proxy->flight != 0) {
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return;
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}
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foreach my $message (@{$proxy->message_list}) {
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if ($message->mt == TLSProxy::Message::MT_CLIENT_HELLO) {
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# Remove all extensions and set the extension len to zero
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$message->extension_data({});
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$message->extensions_len(0);
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# Extensions have been removed so make sure we don't try to use them
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$message->process_extensions();
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$message->repack();
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}
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}
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}
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sub inject_duplicate_extension
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{
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my ($proxy, $message_type) = @_;
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foreach my $message (@{$proxy->message_list}) {
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if ($message->mt == $message_type) {
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my %extensions = %{$message->extension_data};
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# Add a duplicate extension. We use cryptopro_bug since we never
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# normally write that one, and it is allowed as unsolicited in the
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# ServerHello
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$message->set_extension(TLSProxy::Message::EXT_CRYPTOPRO_BUG_EXTENSION, "");
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$message->dupext(TLSProxy::Message::EXT_CRYPTOPRO_BUG_EXTENSION);
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$message->repack();
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}
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}
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}
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sub inject_duplicate_extension_clienthello
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{
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my $proxy = shift;
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# We're only interested in the initial ClientHello
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if ($proxy->flight == 0) {
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inject_duplicate_extension($proxy, TLSProxy::Message::MT_CLIENT_HELLO);
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return;
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}
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my $last_record = @{$proxy->{record_list}}[-1];
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$fatal_alert = 1 if $last_record->is_fatal_alert(1);
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}
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sub inject_duplicate_extension_serverhello
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{
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my $proxy = shift;
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# We're only interested in the initial ServerHello
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if ($proxy->flight == 0) {
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return;
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} elsif ($proxy->flight == 1) {
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inject_duplicate_extension($proxy, TLSProxy::Message::MT_SERVER_HELLO);
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return;
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}
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my $last_record = @{$proxy->{record_list}}[-1];
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$fatal_alert = 1 if $last_record->is_fatal_alert(0);
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}
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sub inject_unsolicited_extension
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{
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my $proxy = shift;
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my $message;
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state $sent_unsolisited_extension;
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if ($proxy->flight == 0) {
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$sent_unsolisited_extension = 0;
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return;
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}
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# We're only interested in the initial ServerHello/EncryptedExtensions
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if ($proxy->flight != 1) {
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if ($sent_unsolisited_extension) {
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my $last_record = @{$proxy->record_list}[-1];
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$fatal_alert = 1 if $last_record->is_fatal_alert(0);
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}
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return;
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}
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if ($testtype == UNSOLICITED_SERVER_NAME_TLS13) {
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return if (!defined($message = ${$proxy->message_list}[2]));
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die "Expecting EE message ".($message->mt).","
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.${$proxy->message_list}[1]->mt.", "
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.${$proxy->message_list}[3]->mt
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if $message->mt != TLSProxy::Message::MT_ENCRYPTED_EXTENSIONS;
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} else {
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$message = ${$proxy->message_list}[1];
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}
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my $ext = pack "C2",
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0x00, 0x00; #Extension length
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my $type;
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if ($testtype == UNSOLICITED_SERVER_NAME
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|| $testtype == UNSOLICITED_SERVER_NAME_TLS13) {
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$type = TLSProxy::Message::EXT_SERVER_NAME;
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} elsif ($testtype == UNSOLICITED_SCT) {
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$type = TLSProxy::Message::EXT_SCT;
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} elsif ($testtype == NONCOMPLIANT_SUPPORTED_GROUPS) {
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$type = TLSProxy::Message::EXT_SUPPORTED_GROUPS;
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}
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$message->set_extension($type, $ext);
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$message->repack();
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$sent_unsolisited_extension = 1;
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}
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sub inject_cryptopro_extension
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{
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my $proxy = shift;
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# We're only interested in the initial ClientHello
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if ($proxy->flight != 0) {
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return;
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}
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my $message = ${$proxy->message_list}[0];
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$message->set_extension(TLSProxy::Message::EXT_CRYPTOPRO_BUG_EXTENSION, "");
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$message->repack();
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}
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# Test 1-2: Sending a duplicate extension should fail.
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$proxy->start() or plan skip_all => "Unable to start up Proxy for tests";
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plan tests => 8;
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ok($fatal_alert, "Duplicate ClientHello extension");
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SKIP: {
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skip "TLS <= 1.2 disabled", 4 if $no_below_tls13;
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$fatal_alert = 0;
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$proxy->clear();
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$proxy->filter(\&inject_duplicate_extension_serverhello);
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$proxy->clientflags("-no_tls1_3");
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$proxy->start();
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ok($fatal_alert, "Duplicate ServerHello extension");
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#Test 3: Sending a zero length extension block should pass
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$proxy->clear();
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$proxy->filter(\&extension_filter);
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$proxy->ciphers("AES128-SHA:\@SECLEVEL=0");
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$proxy->clientflags("-no_tls1_3");
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$proxy->start();
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ok(TLSProxy::Message->success, "Zero extension length test");
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#Test 4: Inject an unsolicited extension (<= TLSv1.2)
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$fatal_alert = 0;
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$proxy->clear();
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$proxy->filter(\&inject_unsolicited_extension);
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$testtype = UNSOLICITED_SERVER_NAME;
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$proxy->clientflags("-no_tls1_3 -noservername");
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$proxy->start();
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ok($fatal_alert, "Unsolicited server name extension");
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#Test 5: Send the cryptopro extension in a ClientHello. Normally this is an
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# unsolicited extension only ever seen in the ServerHello. We should
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# ignore it in a ClientHello
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$proxy->clear();
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$proxy->filter(\&inject_cryptopro_extension);
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$proxy->clientflags("-no_tls1_3");
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$proxy->start();
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ok(TLSProxy::Message->success(), "Cryptopro extension in ClientHello");
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}
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SKIP: {
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skip "TLS <= 1.2 disabled or EC disabled", 1
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if $no_below_tls13 || disabled("ec");
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#Test 6: Inject a noncompliant supported_groups extension (<= TLSv1.2)
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$proxy->clear();
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$proxy->filter(\&inject_unsolicited_extension);
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$testtype = NONCOMPLIANT_SUPPORTED_GROUPS;
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$proxy->clientflags("-no_tls1_3");
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$proxy->start();
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ok(TLSProxy::Message->success(), "Noncompliant supported_groups extension");
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}
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SKIP: {
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skip "TLS <= 1.2 or CT disabled", 1
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if $no_below_tls13 || disabled("ct");
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#Test 7: Same as above for the SCT extension which has special handling
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$fatal_alert = 0;
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$proxy->clear();
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$proxy->filter(\&inject_unsolicited_extension);
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$testtype = UNSOLICITED_SCT;
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$proxy->clientflags("-no_tls1_3");
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$proxy->start();
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ok($fatal_alert, "Unsolicited sct extension");
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}
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SKIP: {
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skip "TLS 1.3 disabled", 1
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if disabled("tls1_3") || (disabled("ec") && disabled("dh"));
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#Test 8: Inject an unsolicited extension (TLSv1.3)
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$fatal_alert = 0;
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$proxy->clear();
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$proxy->filter(\&inject_unsolicited_extension);
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$testtype = UNSOLICITED_SERVER_NAME_TLS13;
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$proxy->clientflags("-noservername");
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$proxy->start();
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ok($fatal_alert, "Unsolicited server name extension (TLSv1.3)");
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}
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