2 # Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
4 # Licensed under the OpenSSL license (the "License"). You may not use
5 # this file except in compliance with the License. You can obtain a copy
6 # in the file LICENSE in the source distribution or at
7 # https://www.openssl.org/source/license.html
10 use OpenSSL::Test qw/:DEFAULT cmdstr srctop_file bldtop_dir/;
11 use OpenSSL::Test::Utils;
14 my $test_name = "test_sslcbcpadding";
17 plan skip_all => "TLSProxy isn't usable on $^O"
18 if $^O =~ /^(VMS|MSWin32)$/;
20 plan skip_all => "$test_name needs the dynamic engine feature enabled"
21 if disabled("engine") || disabled("dynamic-engine");
23 plan skip_all => "$test_name needs the sock feature enabled"
26 plan skip_all => "$test_name needs TLSv1.2 enabled"
27 if disabled("tls1_2");
29 $ENV{OPENSSL_ia32cap} = '~0x200000200000000';
30 my $proxy = TLSProxy::Proxy->new(
31 \&add_maximal_padding_filter,
32 cmdstr(app(["openssl"]), display => 1),
33 srctop_file("apps", "server.pem"),
34 (!$ENV{HARNESS_ACTIVE} || $ENV{HARNESS_VERBOSE})
37 plan tests => 1 + 256;
39 my $bad_padding_offset = -1;
41 # Test 1: Maximally-padded records are accepted.
42 $proxy->start() or plan skip_all => "Unable to start up Proxy for tests";
43 ok(TLSProxy::Message->success(), "Maximally-padded record test");
45 # Tests 2 through 257: Invalid padding.
46 for ($bad_padding_offset = 0; $bad_padding_offset < 256;
47 $bad_padding_offset++) {
49 $proxy->start() or plan skip_all => "Unable to start up Proxy for tests";;
50 ok(TLSProxy::Message->fail(), "Invalid padding byte $bad_padding_offset");
53 sub add_maximal_padding_filter
57 if ($proxy->flight == 0) {
58 # Disable Encrypt-then-MAC.
59 foreach my $message (@{$proxy->message_list}) {
60 if ($message->mt != TLSProxy::Message::MT_CLIENT_HELLO) {
64 $message->delete_extension(TLSProxy::Message::EXT_ENCRYPT_THEN_MAC);
65 $message->process_extensions();
70 if ($proxy->flight == 3) {
71 # Insert a maximally-padded record. Assume a block size of 16 (AES) and
72 # a MAC length of 20 (SHA-1).
76 # Size the plaintext so that 256 is a valid padding.
77 my $plaintext_len = $block_size - ($mac_len % $block_size);
78 my $plaintext = "A" x $plaintext_len;
80 my $data = "B" x $block_size; # Explicit IV.
82 $data .= TLSProxy::Proxy::fill_known_data($mac_len); # MAC.
85 for (my $i = 0; $i < 256; $i++) {
86 if ($i == $bad_padding_offset) {
93 my $record = TLSProxy::Record->new(
95 TLSProxy::Record::RT_APPLICATION_DATA,
96 TLSProxy::Record::VERS_TLS_1_2,
104 # Send the record immediately after the server Finished.
105 push @{$proxy->record_list}, $record;