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#! /usr/bin/env perl
# Copyright 2017-2023 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the Apache License 2.0 (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 $test_name = "test_tls13hrr";
setup($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") || (disabled("ec") && disabled("dh"));
$ENV{OPENSSL_ia32cap} = '~0x200000200000000';
my $proxy = TLSProxy::Proxy->new(
undef,
cmdstr(app(["openssl"]), display => 1),
srctop_file("apps", "server.pem"),
(!$ENV{HARNESS_ACTIVE} || $ENV{HARNESS_VERBOSE})
);
use constant {
CHANGE_HRR_CIPHERSUITE => 0,
CHANGE_CH1_CIPHERSUITE => 1,
DUPLICATE_HRR => 2,
INVALID_GROUP => 3
};
#Test 1: A client should fail if the server changes the ciphersuite between the
# HRR and the SH
$proxy->filter(\&hrr_filter);
if (disabled("ec")) {
$proxy->serverflags("-curves ffdhe3072");
} else {
$proxy->serverflags("-curves P-256");
}
my $testtype = CHANGE_HRR_CIPHERSUITE;
$proxy->start() or plan skip_all => "Unable to start up Proxy for tests";
plan tests => 4;
ok(TLSProxy::Message->fail(), "Server ciphersuite changes");
#Test 2: It is an error if the client changes the offered ciphersuites so that
# we end up selecting a different ciphersuite between HRR and the SH
$proxy->clear();
if (disabled("ec")) {
$proxy->serverflags("-curves ffdhe3072");
} else {
$proxy->serverflags("-curves P-256");
}
$proxy->ciphersuitess("TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384");
$testtype = CHANGE_CH1_CIPHERSUITE;
$proxy->start();
ok(TLSProxy::Message->fail(), "Client ciphersuite changes");
#Test 3: A client should fail with unexpected_message alert if the server
# sends more than 1 HRR
my $fatal_alert = 0;
$proxy->clear();
if (disabled("ec")) {
$proxy->serverflags("-curves ffdhe3072");
} else {
$proxy->serverflags("-curves P-256");
}
$testtype = DUPLICATE_HRR;
$proxy->start();
ok($fatal_alert, "Server duplicated HRR");
#Test 4: If the client sends a group that is in the supported_groups list but
# otherwise not valid (e.g. not suitable for TLSv1.3) we should reject it
# and not consider it when sending the HRR. We send brainpoolP512r1 in
# the ClientHello, which is acceptable to the server but is not valid in
# TLSv1.3. We expect the server to select X25519 in the HRR and the
# handshake to complete successfully
SKIP: {
skip "EC/TLSv1.2 is disabled in this build", 1
if disabled("ec") || disabled("tls1_2");
$proxy->clear();
$proxy->clientflags("-groups P-256:brainpoolP512r1:X25519");
$proxy->serverflags("-groups brainpoolP512r1:X25519");
$testtype = INVALID_GROUP;
$proxy->start();
ok(TLSProxy::Message->success(), "Invalid group with HRR");
}
sub hrr_filter
{
my $proxy = shift;
if ($testtype == CHANGE_HRR_CIPHERSUITE) {
# We're only interested in the HRR
if ($proxy->flight != 1) {
return;
}
my $hrr = ${$proxy->message_list}[1];
# We will normally only ever select CIPHER_TLS13_AES_128_GCM_SHA256
# because that's what Proxy tells s_server to do. Setting as below means
# the ciphersuite will change will we get the ServerHello
$hrr->ciphersuite(TLSProxy::Message::CIPHER_TLS13_AES_256_GCM_SHA384);
$hrr->repack();
return;
}
if ($testtype == DUPLICATE_HRR) {
# We're only interested in the HRR
# and the unexpected_message alert from client
if ($proxy->flight == 4) {
$fatal_alert = 1
if @{$proxy->record_list}[-1]->is_fatal_alert(0) == 10;
return;
}
if ($proxy->flight != 3) {
return;
}
# Find ServerHello record (HRR actually) and insert after that
my $i;
for ($i = 0; ${$proxy->record_list}[$i]->flight() < 1; $i++) {
next;
}
my $hrr_record = ${$proxy->record_list}[$i];
my $dup_hrr = TLSProxy::Record->new(3,
$hrr_record->content_type(),
$hrr_record->version(),
$hrr_record->len(),
$hrr_record->sslv2(),
$hrr_record->len_real(),
$hrr_record->decrypt_len(),
$hrr_record->data(),
$hrr_record->decrypt_data());
$i++;
splice @{$proxy->record_list}, $i, 0, $dup_hrr;
return;
}
if ($proxy->flight != 0) {
return;
}
my $ch1 = ${$proxy->message_list}[0];
if ($testtype == CHANGE_CH1_CIPHERSUITE) {
# The server will always pick TLS_AES_256_GCM_SHA384
my @ciphersuites = (TLSProxy::Message::CIPHER_TLS13_AES_128_GCM_SHA256);
$ch1->ciphersuite_len(2 * scalar @ciphersuites);
$ch1->ciphersuites(\@ciphersuites);
} elsif ($testtype == INVALID_GROUP) {
# INVALID_GROUP
my $ext = pack "C7",
0x00, 0x05, #List Length
0x00, 0x1c, #brainpoolP512r1 (not compatible with TLSv1.3)
0x00, 0x01, 0xff; #key_exchange data
$ch1->set_extension(
TLSProxy::Message::EXT_KEY_SHARE, $ext);
}
$ch1->repack();
}
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