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#! /usr/bin/env perl
# Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the OpenSSL license (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 feature 'state';
use OpenSSL::Test qw/:DEFAULT cmdstr srctop_file bldtop_dir/;
use OpenSSL::Test::Utils;
use TLSProxy::Proxy;
my $test_name = "test_sslextension";
setup($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 TLS enabled"
if alldisabled(available_protocols("tls"));
my $no_below_tls13 = alldisabled(("tls1", "tls1_1", "tls1_2"))
|| (!disabled("tls1_3") && disabled("tls1_2"));
use constant {
UNSOLICITED_SERVER_NAME => 0,
UNSOLICITED_SERVER_NAME_TLS13 => 1,
UNSOLICITED_SCT => 2,
NONCOMPLIANT_SUPPORTED_GROUPS => 3
};
my $testtype;
my $fatal_alert = 0; # set by filter on fatal alert
$ENV{OPENSSL_ia32cap} = '~0x200000200000000';
my $proxy = TLSProxy::Proxy->new(
\&inject_duplicate_extension_clienthello,
cmdstr(app(["openssl"]), display => 1),
srctop_file("apps", "server.pem"),
(!$ENV{HARNESS_ACTIVE} || $ENV{HARNESS_VERBOSE})
);
sub extension_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];
$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) {
# Remove all extensions and set the extension len to zero
$message->extension_data({});
$message->extensions_len(0);
# Extensions have been removed so make sure we don't try to use them
$message->process_extensions();
$message->repack();
}
}
}
sub inject_duplicate_extension
{
my ($proxy, $message_type) = @_;
foreach my $message (@{$proxy->message_list}) {
if ($message->mt == $message_type) {
my %extensions = %{$message->extension_data};
# Add a duplicate (unknown) extension.
$message->set_extension(TLSProxy::Message::EXT_DUPLICATE_EXTENSION, "");
$message->set_extension(TLSProxy::Message::EXT_DUPLICATE_EXTENSION, "");
$message->repack();
}
}
}
sub inject_duplicate_extension_clienthello
{
my $proxy = shift;
# We're only interested in the initial ClientHello
if ($proxy->flight == 0) {
inject_duplicate_extension($proxy, TLSProxy::Message::MT_CLIENT_HELLO);
return;
}
my $last_record = @{$proxy->{record_list}}[-1];
$fatal_alert = 1 if $last_record->is_fatal_alert(1);
}
sub inject_duplicate_extension_serverhello
{
my $proxy = shift;
# We're only interested in the initial ServerHello
if ($proxy->flight == 0) {
return;
} elsif ($proxy->flight == 1) {
inject_duplicate_extension($proxy, TLSProxy::Message::MT_SERVER_HELLO);
return;
}
my $last_record = @{$proxy->{record_list}}[-1];
$fatal_alert = 1 if $last_record->is_fatal_alert(0);
}
sub inject_unsolicited_extension
{
my $proxy = shift;
my $message;
state $sent_unsolisited_extension;
if ($proxy->flight == 0) {
$sent_unsolisited_extension = 0;
return;
}
# We're only interested in the initial ServerHello/EncryptedExtensions
if ($proxy->flight != 1) {
if ($sent_unsolisited_extension) {
my $last_record = @{$proxy->record_list}[-1];
$fatal_alert = 1 if $last_record->is_fatal_alert(0);
}
return;
}
if ($testtype == UNSOLICITED_SERVER_NAME_TLS13) {
return if (!defined($message = ${$proxy->message_list}[2]));
die "Expecting EE message ".($message->mt).","
.${$proxy->message_list}[1]->mt.", "
.${$proxy->message_list}[3]->mt
if $message->mt != TLSProxy::Message::MT_ENCRYPTED_EXTENSIONS;
} else {
$message = ${$proxy->message_list}[1];
}
my $ext = pack "C2",
0x00, 0x00; #Extension length
my $type;
if ($testtype == UNSOLICITED_SERVER_NAME
|| $testtype == UNSOLICITED_SERVER_NAME_TLS13) {
$type = TLSProxy::Message::EXT_SERVER_NAME;
} elsif ($testtype == UNSOLICITED_SCT) {
$type = TLSProxy::Message::EXT_SCT;
} elsif ($testtype == NONCOMPLIANT_SUPPORTED_GROUPS) {
$type = TLSProxy::Message::EXT_SUPPORTED_GROUPS;
}
$message->set_extension($type, $ext);
$message->repack();
$sent_unsolisited_extension = 1;
}
# Test 1-2: Sending a duplicate extension should fail.
$proxy->start() or plan skip_all => "Unable to start up Proxy for tests";
plan tests => 7;
ok($fatal_alert, "Duplicate ClientHello extension");
$fatal_alert = 0;
$proxy->clear();
$proxy->filter(\&inject_duplicate_extension_serverhello);
$proxy->start();
ok($fatal_alert, "Duplicate ServerHello extension");
SKIP: {
skip "TLS <= 1.2 disabled", 3 if $no_below_tls13;
#Test 3: Sending a zero length extension block should pass
$proxy->clear();
$proxy->filter(\&extension_filter);
$proxy->start();
ok(TLSProxy::Message->success, "Zero extension length test");
#Test 4: Inject an unsolicited extension (<= TLSv1.2)
$fatal_alert = 0;
$proxy->clear();
$proxy->filter(\&inject_unsolicited_extension);
$testtype = UNSOLICITED_SERVER_NAME;
$proxy->clientflags("-no_tls1_3 -noservername");
$proxy->start();
ok($fatal_alert, "Unsolicited server name extension");
#Test 5: Inject a noncompliant supported_groups extension (<= TLSv1.2)
$proxy->clear();
$proxy->filter(\&inject_unsolicited_extension);
$testtype = NONCOMPLIANT_SUPPORTED_GROUPS;
$proxy->clientflags("-no_tls1_3");
$proxy->start();
ok(TLSProxy::Message->success(), "Noncompliant supported_groups extension");
}
SKIP: {
skip "TLS <= 1.2 or CT disabled", 1
if $no_below_tls13 || disabled("ct");
#Test 6: Same as above for the SCT extension which has special handling
$fatal_alert = 0;
$proxy->clear();
$testtype = UNSOLICITED_SCT;
$proxy->clientflags("-no_tls1_3");
$proxy->start();
ok($fatal_alert, "Unsolicited sct extension");
}
SKIP: {
skip "TLS 1.3 disabled", 1 if disabled("tls1_3");
#Test 7: Inject an unsolicited extension (TLSv1.3)
$fatal_alert = 0;
$proxy->clear();
$proxy->filter(\&inject_unsolicited_extension);
$testtype = UNSOLICITED_SERVER_NAME_TLS13;
$proxy->clientflags("-noservername");
$proxy->start();
ok($fatal_alert, "Unsolicited server name extension (TLSv1.3)");
}
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