146 lines
5.2 KiB
Perl
146 lines
5.2 KiB
Perl
#! /usr/bin/env perl
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# Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.
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#
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# Licensed under the Apache License 2.0 (the "License"). You may not use
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# this file except in compliance with the License. You can obtain a copy
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# in the file LICENSE in the source distribution or at
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# https://www.openssl.org/source/license.html
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use strict;
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use OpenSSL::Test qw/:DEFAULT cmdstr srctop_file bldtop_dir/;
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use OpenSSL::Test::Utils;
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use TLSProxy::Proxy;
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my $test_name = "test_sslsignature";
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setup($test_name);
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plan skip_all => "TLSProxy isn't usable on $^O"
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if $^O =~ /^(VMS)$/;
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plan skip_all => "$test_name needs the dynamic engine feature enabled"
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if disabled("engine") || disabled("dynamic-engine");
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plan skip_all => "$test_name needs the sock feature enabled"
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if disabled("sock");
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plan skip_all => "$test_name needs TLS enabled"
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if alldisabled(available_protocols("tls"));
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my $proxy = TLSProxy::Proxy->new(
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undef,
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cmdstr(app(["openssl"]), display => 1),
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srctop_file("apps", "server.pem"),
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(!$ENV{HARNESS_ACTIVE} || $ENV{HARNESS_VERBOSE})
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);
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use constant {
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NO_CORRUPTION => 0,
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CORRUPT_SERVER_CERT_VERIFY => 1,
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CORRUPT_CLIENT_CERT_VERIFY => 2,
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CORRUPT_TLS1_2_SERVER_KEY_EXCHANGE => 3,
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};
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$proxy->filter(\&signature_filter);
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#Test 1: No corruption should succeed
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my $testtype = NO_CORRUPTION;
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$proxy->clientflags("-no_tls1_3") if disabled("ec") && disabled("dh");
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$proxy->start() or plan skip_all => "Unable to start up Proxy for tests";
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plan tests => 4;
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ok(TLSProxy::Message->success, "No corruption");
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SKIP: {
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skip "TLSv1.3 disabled", 1
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if disabled("tls1_3") || (disabled("ec") && disabled("dh"));
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#Test 2: Corrupting a server CertVerify signature in TLSv1.3 should fail
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$proxy->clear();
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$testtype = CORRUPT_SERVER_CERT_VERIFY;
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$proxy->start();
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ok(TLSProxy::Message->fail, "Corrupt server TLSv1.3 CertVerify");
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#Test x: Corrupting a client CertVerify signature in TLSv1.3 should fail
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#$proxy->clear();
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#$testtype = CORRUPT_CLIENT_CERT_VERIFY;
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#$proxy->serverflags("-Verify 5");
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#$proxy->clientflags("-cert ".srctop_file("apps", "server.pem"));
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#$proxy->start();
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#ok(TLSProxy::Message->fail, "Corrupt client TLSv1.3 CertVerify");
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#TODO(TLS1.3): This test fails due to a problem in s_server/TLSProxy.
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#Currently a connection is counted as "successful" if the client ends it
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#with a close_notify. In TLSProxy the client initiates the closure of the
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#connection so really we should not count it as successful until s_server
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#has also responded with a close_notify. However s_server never sends a
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#close_notify - it just closes the connection. Fixing this would be a
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#significant change to the long established behaviour of s_server.
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#Unfortunately in this test, it is the server that notices the incorrect
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#signature and responds with an appropriate alert. However s_client never
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#sees that because it occurs after the server Finished has been sent.
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#Therefore s_client just continues to send its application data and sends
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#its close_notify regardless. TLSProxy sees this and thinks that the
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#connection was successful when in fact it was not. There isn't an easy fix
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#for this, so leaving this test commented out for now.
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}
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SKIP: {
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skip "TLS <= 1.2 disabled", 2
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if alldisabled(("ssl3", "tls1", "tls1_1", "tls1_2"));
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#Test 3: Corrupting a CertVerify signature in <=TLSv1.2 should fail
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$proxy->clear();
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$testtype = CORRUPT_CLIENT_CERT_VERIFY;
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$proxy->serverflags("-Verify 5");
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$proxy->clientflags("-no_tls1_3 -cert ".srctop_file("apps", "server.pem"));
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$proxy->start();
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ok(TLSProxy::Message->fail, "Corrupt <=TLSv1.2 CertVerify");
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SKIP: {
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skip "DH disabled", 1 if disabled("dh");
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#Test 4: Corrupting a ServerKeyExchange signature in <=TLSv1.2 should
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#fail
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$proxy->clear();
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$testtype = CORRUPT_TLS1_2_SERVER_KEY_EXCHANGE;
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$proxy->clientflags("-no_tls1_3");
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$proxy->cipherc('DHE-RSA-AES128-SHA');
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$proxy->ciphers('DHE-RSA-AES128-SHA');
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$proxy->start();
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ok(TLSProxy::Message->fail, "Corrupt <=TLSv1.2 ServerKeyExchange");
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}
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}
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sub signature_filter
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{
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my $proxy = shift;
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my $flight;
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my $mt = TLSProxy::Message::MT_CERTIFICATE_VERIFY;
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if ($testtype == CORRUPT_SERVER_CERT_VERIFY
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|| $testtype == CORRUPT_TLS1_2_SERVER_KEY_EXCHANGE
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|| (!disabled("tls1_3") && $testtype == NO_CORRUPTION)) {
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$flight = 1;
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} else {
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$flight = 2;
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}
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# We're only interested in the initial server flight
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return if ($proxy->flight != $flight);
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$mt = TLSProxy::Message::MT_SERVER_KEY_EXCHANGE
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if ($testtype == CORRUPT_TLS1_2_SERVER_KEY_EXCHANGE);
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foreach my $message (@{$proxy->message_list}) {
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if ($message->mt == $mt) {
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my $sig = $message->signature();
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my $sigbase = substr($sig, 0, -1);
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my $sigend = unpack("C", substr($sig, -1));
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#Flip bits in final byte of signature to corrupt the sig
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$sigend ^= 0xff unless $testtype == NO_CORRUPTION;
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$message->signature($sigbase.pack("C", $sigend));
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$message->repack();
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}
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}
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}
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