#!/usr/bin/perl
# Written by Matt Caswell for the OpenSSL project.
# ====================================================================
# Copyright (c) 1998-2015 The OpenSSL Project.  All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in
#    the documentation and/or other materials provided with the
#    distribution.
#
# 3. All advertising materials mentioning features or use of this
#    software must display the following acknowledgment:
#    "This product includes software developed by the OpenSSL Project
#    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
#
# 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
#    endorse or promote products derived from this software without
#    prior written permission. For written permission, please contact
#    openssl-core@openssl.org.
#
# 5. Products derived from this software may not be called "OpenSSL"
#    nor may "OpenSSL" appear in their names without prior written
#    permission of the OpenSSL Project.
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# 6. Redistributions of any form whatsoever must retain the following
#    acknowledgment:
#    "This product includes software developed by the OpenSSL Project
#    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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# THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
# OF THE POSSIBILITY OF SUCH DAMAGE.
# ====================================================================
#
# This product includes cryptographic software written by Eric Young
# (eay@cryptsoft.com).  This product includes software written by Tim
# Hudson (tjh@cryptsoft.com).

use strict;
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 $^O =~ /^(VMS|MSWin32)$/;

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");

$ENV{OPENSSL_ia32cap} = '~0x200000200000000';
my $proxy = TLSProxy::Proxy->new(
    \&extension_filter,
    cmdstr(app(["openssl"])),
    srctop_file("apps", "server.pem"),
    (!$ENV{HARNESS_ACTIVE} || $ENV{HARNESS_VERBOSE})
);

plan tests => 3;

# Test 1: Sending a zero length extension block should pass
$proxy->start();
ok(TLSProxy::Message->success, "Zero extension length test");

sub extension_filter
{
    my $proxy = shift;

    # 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();
        }
    }
}

# Test 2-3: Sending a duplicate extension should fail.
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) {
        return;
    }

    inject_duplicate_extension($proxy, TLSProxy::Message::MT_CLIENT_HELLO);
}

sub inject_duplicate_extension_serverhello
{
    my $proxy = shift;

    # We're only interested in the initial ServerHello
    if ($proxy->flight != 1) {
        return;
    }

    inject_duplicate_extension($proxy, TLSProxy::Message::MT_SERVER_HELLO);
}

$proxy->clear();
$proxy->filter(\&inject_duplicate_extension_clienthello);
$proxy->start();
ok(TLSProxy::Message->fail(), "Duplicate ClientHello extension");

$proxy->clear();
$proxy->filter(\&inject_duplicate_extension_serverhello);
$proxy->start();
ok(TLSProxy::Message->fail(), "Duplicate ServerHello extension");