# -*- mode: perl; -*-
# Copyright 2016-2016 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the OpenSSL license (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
## Test version negotiation
package ssltests;
use strict;
use warnings;
use List::Util qw/max min/;
use OpenSSL::Test;
use OpenSSL::Test::Utils qw/anydisabled alldisabled/;
setup("no_test_here");
my @tls_protocols = ("SSLv3", "TLSv1", "TLSv1.1", "TLSv1.2");
# undef stands for "no limit".
my @min_tls_protocols = (undef, "SSLv3", "TLSv1", "TLSv1.1", "TLSv1.2");
my @max_tls_protocols = ("SSLv3", "TLSv1", "TLSv1.1", "TLSv1.2", undef);
my @is_tls_disabled = anydisabled("ssl3", "tls1", "tls1_1", "tls1_2");
my $min_tls_enabled; my $max_tls_enabled;
# Protocol configuration works in cascades, i.e.,
# $no_tls1_1 disables TLSv1.1 and below.
#
# $min_enabled and $max_enabled will be correct if there is at least one
# protocol enabled.
foreach my $i (0..$#tls_protocols) {
if (!$is_tls_disabled[$i]) {
$min_tls_enabled = $i;
last;
}
}
foreach my $i (0..$#tls_protocols) {
if (!$is_tls_disabled[$i]) {
$max_tls_enabled = $i;
}
}
my @dtls_protocols = ("DTLSv1", "DTLSv1.2");
# undef stands for "no limit".
my @min_dtls_protocols = (undef, "DTLSv1", "DTLSv1.2");
my @max_dtls_protocols = ("DTLSv1", "DTLSv1.2", undef);
my @is_dtls_disabled = anydisabled("dtls1", "dtls1_2");
my $min_dtls_enabled; my $max_dtls_enabled;
# $min_enabled and $max_enabled will be correct if there is at least one
# protocol enabled.
foreach my $i (0..$#dtls_protocols) {
if (!$is_dtls_disabled[$i]) {
$min_dtls_enabled = $i;
last;
}
}
foreach my $i (0..$#dtls_protocols) {
if (!$is_dtls_disabled[$i]) {
$max_dtls_enabled = $i;
}
}
sub no_tests {
my ($dtls) = @_;
return $dtls ? alldisabled("dtls1", "dtls1_2") :
alldisabled("ssl3", "tls1", "tls1_1", "tls1_2");
}
sub generate_version_tests {
my ($method) = @_;
my $dtls = $method eq "DTLS";
# Don't write the redundant "Method = TLS" into the configuration.
undef $method if !$dtls;
my @protocols = $dtls ? @dtls_protocols : @tls_protocols;
my @min_protocols = $dtls ? @min_dtls_protocols : @min_tls_protocols;
my @max_protocols = $dtls ? @max_dtls_protocols : @max_tls_protocols;
my $min_enabled = $dtls ? $min_dtls_enabled : $min_tls_enabled;
my $max_enabled = $dtls ? $max_dtls_enabled : $max_tls_enabled;
if (no_tests($dtls)) {
return;
}
my @tests = ();
foreach my $c_min (0..$#min_protocols) {
my $c_max_min = $c_min == 0 ? 0 : $c_min - 1;
foreach my $c_max ($c_max_min..$#max_protocols) {
foreach my $s_min (0..$#min_protocols) {
my $s_max_min = $s_min == 0 ? 0 : $s_min - 1;
foreach my $s_max ($s_max_min..$#max_protocols) {
my ($result, $protocol) =
expected_result($c_min, $c_max, $s_min, $s_max,
$min_enabled, $max_enabled, \@protocols);
push @tests, {
"name" => "version-negotiation",
"client" => {
"MinProtocol" => $min_protocols[$c_min],
"MaxProtocol" => $max_protocols[$c_max],
},
"server" => {
"MinProtocol" => $min_protocols[$s_min],
"MaxProtocol" => $max_protocols[$s_max],
},
"test" => {
"ExpectedResult" => $result,
"ExpectedProtocol" => $protocol,
"Method" => $method,
}
};
}
}
}
}
return @tests;
}
sub generate_resumption_tests {
my ($method) = @_;
my $dtls = $method eq "DTLS";
# Don't write the redundant "Method = TLS" into the configuration.
undef $method if !$dtls;
my @protocols = $dtls ? @dtls_protocols : @tls_protocols;
my $min_enabled = $dtls ? $min_dtls_enabled : $min_tls_enabled;
if (no_tests($dtls)) {
return;
}
my @server_tests = ();
my @client_tests = ();
# Obtain the first session against a fixed-version server/client.
foreach my $original_protocol($min_enabled..$#protocols) {
# Upgrade or downgrade the server/client max version support and test
# that it upgrades, downgrades or resumes the session as well.
foreach my $resume_protocol($min_enabled..$#protocols) {
my $resumption_expected;
# We should only resume on exact version match.
if ($original_protocol eq $resume_protocol) {
$resumption_expected = "Yes";
} else {
$resumption_expected = "No";
}
foreach my $ticket ("SessionTicket", "-SessionTicket") {
# Client is flexible, server upgrades/downgrades.
push @server_tests, {
"name" => "resumption",
"client" => { },
"server" => {
"MinProtocol" => $protocols[$original_protocol],
"MaxProtocol" => $protocols[$original_protocol],
"Options" => $ticket,
},
"resume_server" => {
"MaxProtocol" => $protocols[$resume_protocol],
},
"test" => {
"ExpectedProtocol" => $protocols[$resume_protocol],
"Method" => $method,
"HandshakeMode" => "Resume",
"ResumptionExpected" => $resumption_expected,
}
};
# Server is flexible, client upgrades/downgrades.
push @client_tests, {
"name" => "resumption",
"client" => {
"MinProtocol" => $protocols[$original_protocol],
"MaxProtocol" => $protocols[$original_protocol],
},
"server" => {
"Options" => $ticket,
},
"resume_client" => {
"MaxProtocol" => $protocols[$resume_protocol],
},
"test" => {
"ExpectedProtocol" => $protocols[$resume_protocol],
"Method" => $method,
"HandshakeMode" => "Resume",
"ResumptionExpected" => $resumption_expected,
}
};
}
}
}
return (@server_tests, @client_tests);
}
sub expected_result {
my ($c_min, $c_max, $s_min, $s_max, $min_enabled, $max_enabled,
$protocols) = @_;
# Adjust for "undef" (no limit).
$c_min = $c_min == 0 ? 0 : $c_min - 1;
$c_max = $c_max == scalar @$protocols ? $c_max - 1 : $c_max;
$s_min = $s_min == 0 ? 0 : $s_min - 1;
$s_max = $s_max == scalar @$protocols ? $s_max - 1 : $s_max;
# We now have at least one protocol enabled, so $min_enabled and
# $max_enabled are well-defined.
$c_min = max $c_min, $min_enabled;
$s_min = max $s_min, $min_enabled;
$c_max = min $c_max, $max_enabled;
$s_max = min $s_max, $max_enabled;
if ($c_min > $c_max) {
# Client should fail to even send a hello.
# This results in an internal error since the server will be
# waiting for input that never arrives.
return ("InternalError", undef);
} elsif ($s_min > $s_max) {
# Server has no protocols, should always fail.
return ("ServerFail", undef);
} elsif ($s_min > $c_max) {
# Server doesn't support the client range.
return ("ServerFail", undef);
} elsif ($c_min > $s_max) {
# Server will try with a version that is lower than the lowest
# supported client version.
return ("ClientFail", undef);
} else {
# Server and client ranges overlap.
my $max_common = $s_max < $c_max ? $s_max : $c_max;
return ("Success", $protocols->[$max_common]);
}
}
1;
