#! /usr/bin/env perl

# Copyright 2017-2018 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 OpenSSL::Test qw/:DEFAULT cmdstr srctop_file bldtop_dir/;

use OpenSSL::Test::Utils;

use TLSProxy::Proxy;

my $test_name = "test_tls13cookie";

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 enabled"

    if disabled("tls1_3");

$ENV{OPENSSL_ia32cap} = '~0x200000200000000';

use constant {

    COOKIE_ONLY => 0,

    COOKIE_AND_KEY_SHARE => 1

};

my $proxy = TLSProxy::Proxy->new(

    undef,

    cmdstr(app(["openssl"]), display => 1),

    srctop_file("apps", "server.pem"),

    (!$ENV{HARNESS_ACTIVE} || $ENV{HARNESS_VERBOSE})

);

my $cookieseen = 0;

my $testtype;

#Test 1: Inserting a cookie into an HRR should see it echoed in the ClientHello

$testtype = COOKIE_ONLY;

$proxy->filter(\&cookie_filter);

$proxy->serverflags("-curves X25519");

$proxy->start() or plan skip_all => "Unable to start up Proxy for tests";

plan tests => 2;

ok(TLSProxy::Message->success() && $cookieseen == 1, "Cookie seen");

#Test 2: Same as test 1 but should also work where a new key_share is also

#        required

$testtype = COOKIE_AND_KEY_SHARE;

$proxy->clear();

$proxy->clientflags("-curves P-256:X25519");

$proxy->serverflags("-curves X25519");

$proxy->start();

ok(TLSProxy::Message->success() && $cookieseen == 1, "Cookie seen");

sub cookie_filter

{

    my $proxy = shift;

    # We're only interested in the HRR and both ClientHellos

    return if ($proxy->flight > 2);

    my $ext = pack "C8",

        0x00, 0x06, #Cookie Length

        0x00, 0x01, #Dummy cookie data (6 bytes)

        0x02, 0x03,

        0x04, 0x05;

    foreach my $message (@{$proxy->message_list}) {

        if ($message->mt == TLSProxy::Message::MT_SERVER_HELLO

                && ${$message->records}[0]->flight == 1) {

            $message->delete_extension(TLSProxy::Message::EXT_KEY_SHARE)

                if ($testtype == COOKIE_ONLY);

            $message->set_extension(TLSProxy::Message::EXT_COOKIE, $ext);

            $message->repack();

        } elsif ($message->mt == TLSProxy::Message::MT_CLIENT_HELLO) {

            if (${$message->records}[0]->flight == 0) {

                if ($testtype == COOKIE_ONLY) {

                    my $ext = pack "C7",

                        0x00, 0x05, #List Length

                        0x00, 0x17, #P-256

                        0x00, 0x01, #key_exchange data length

                        0xff;       #Dummy key_share data

                    # Trick the server into thinking we got an unacceptable

                    # key_share

                    $message->set_extension(

                        TLSProxy::Message::EXT_KEY_SHARE, $ext);

                    $message->repack();

                }

            } else {

                #cmp can behave differently dependent on locale

                no locale;

                my $cookie =

                    $message->extension_data->{TLSProxy::Message::EXT_COOKIE};

                return if !defined($cookie);

                return if ($cookie cmp $ext) != 0;

                $cookieseen = 1;

            }

        }

    }

}