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 # TODO: We could test all 256 values, but then the log file gets too large for
38 # CI. See https://github.com/openssl/openssl/issues/1440.
39 my @test_offsets = (0, 128, 254, 255);
41 # Test that maximally-padded records are accepted.
42 my $bad_padding_offset = -1;
43 $proxy->start() or plan skip_all => "Unable to start up Proxy for tests";
44 plan tests => 1 + scalar(@test_offsets);
45 ok(TLSProxy::Message->success(), "Maximally-padded record test");
47 # Test that invalid padding is rejected.
48 foreach my $offset (@test_offsets) {
50 $bad_padding_offset = $offset;
52 ok(TLSProxy::Message->fail(), "Invalid padding byte $bad_padding_offset");
55 sub add_maximal_padding_filter
59 if ($proxy->flight == 0) {
60 # Disable Encrypt-then-MAC.
61 foreach my $message (@{$proxy->message_list}) {
62 if ($message->mt != TLSProxy::Message::MT_CLIENT_HELLO) {
66 $message->delete_extension(TLSProxy::Message::EXT_ENCRYPT_THEN_MAC);
67 $message->process_extensions();
72 if ($proxy->flight == 3) {
73 # Insert a maximally-padded record. Assume a block size of 16 (AES) and
74 # a MAC length of 20 (SHA-1).
78 # Size the plaintext so that 256 is a valid padding.
79 my $plaintext_len = $block_size - ($mac_len % $block_size);
80 my $plaintext = "A" x $plaintext_len;
82 my $data = "B" x $block_size; # Explicit IV.
84 $data .= TLSProxy::Proxy::fill_known_data($mac_len); # MAC.
87 for (my $i = 0; $i < 256; $i++) {
88 if ($i == $bad_padding_offset) {
95 my $record = TLSProxy::Record->new(
97 TLSProxy::Record::RT_APPLICATION_DATA,
98 TLSProxy::Record::VERS_TLS_1_2,
107 # Send the record immediately after the server Finished.
108 push @{$proxy->record_list}, $record;