test/ssl-tests/protocol_version.pm

   1 # -*- mode: perl; -*-
   2 # Copyright 2016-2016 The OpenSSL Project Authors. All Rights Reserved.
   3 #
   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
   8
   9
  10 ## Test version negotiation
  11
  12 package ssltests;
  13
  14 use strict;
  15 use warnings;
  16
  17 use List::Util qw/max min/;
  18
  19 use OpenSSL::Test;
  20 use OpenSSL::Test::Utils qw/anydisabled alldisabled/;
  21 setup("no_test_here");
  22
  23 my @tls_protocols = ("SSLv3", "TLSv1", "TLSv1.1", "TLSv1.2");
  24 # undef stands for "no limit".
  25 my @min_tls_protocols = (undef, "SSLv3", "TLSv1", "TLSv1.1", "TLSv1.2");
  26 my @max_tls_protocols = ("SSLv3", "TLSv1", "TLSv1.1", "TLSv1.2", undef);
  27
  28 my @is_tls_disabled = anydisabled("ssl3", "tls1", "tls1_1", "tls1_2");
  29
  30 my $min_tls_enabled; my $max_tls_enabled;
  31
  32 # Protocol configuration works in cascades, i.e.,
  33 # $no_tls1_1 disables TLSv1.1 and below.
  34 #
  35 # $min_enabled and $max_enabled will be correct if there is at least one
  36 # protocol enabled.
  37 foreach my $i (0..$#tls_protocols) {
  38     if (!$is_tls_disabled[$i]) {
  39         $min_tls_enabled = $i;
  40         last;
  41     }
  42 }
  43
  44 foreach my $i (0..$#tls_protocols) {
  45     if (!$is_tls_disabled[$i]) {
  46         $max_tls_enabled = $i;
  47     }
  48 }
  49
  50 my @dtls_protocols = ("DTLSv1", "DTLSv1.2");
  51 # undef stands for "no limit".
  52 my @min_dtls_protocols = (undef, "DTLSv1", "DTLSv1.2");
  53 my @max_dtls_protocols = ("DTLSv1", "DTLSv1.2", undef);
  54
  55 my @is_dtls_disabled = anydisabled("dtls1", "dtls1_2");
  56
  57 my $min_dtls_enabled; my $max_dtls_enabled;
  58
  59 # $min_enabled and $max_enabled will be correct if there is at least one
  60 # protocol enabled.
  61 foreach my $i (0..$#dtls_protocols) {
  62     if (!$is_dtls_disabled[$i]) {
  63         $min_dtls_enabled = $i;
  64         last;
  65     }
  66 }
  67
  68 foreach my $i (0..$#dtls_protocols) {
  69     if (!$is_dtls_disabled[$i]) {
  70         $max_dtls_enabled = $i;
  71     }
  72 }
  73
  74 sub no_tests {
  75     my ($dtls) = @_;
  76     return $dtls ? alldisabled("dtls1", "dtls1_2") :
  77       alldisabled("ssl3", "tls1", "tls1_1", "tls1_2");
  78 }
  79
  80 sub generate_version_tests {
  81     my ($method) = @_;
  82
  83     my $dtls = $method eq "DTLS";
  84     # Don't write the redundant "Method = TLS" into the configuration.
  85     undef $method if !$dtls;
  86
  87     my @protocols = $dtls ? @dtls_protocols : @tls_protocols;
  88     my @min_protocols = $dtls ? @min_dtls_protocols : @min_tls_protocols;
  89     my @max_protocols = $dtls ? @max_dtls_protocols : @max_tls_protocols;
  90     my $min_enabled  = $dtls ? $min_dtls_enabled : $min_tls_enabled;
  91     my $max_enabled  = $dtls ? $max_dtls_enabled : $max_tls_enabled;
  92
  93     if (no_tests($dtls)) {
  94         return;
  95     }
  96
  97     my @tests = ();
  98
  99     foreach my $c_min (0..$#min_protocols) {
 100         my $c_max_min = $c_min == 0 ? 0 : $c_min - 1;
 101         foreach my $c_max ($c_max_min..$#max_protocols) {
 102             foreach my $s_min (0..$#min_protocols) {
 103                 my $s_max_min = $s_min == 0 ? 0 : $s_min - 1;
 104                 foreach my $s_max ($s_max_min..$#max_protocols) {
 105                     my ($result, $protocol) =
 106                         expected_result($c_min, $c_max, $s_min, $s_max,
 107                                         $min_enabled, $max_enabled, \@protocols);
 108                     push @tests, {
 109                         "name" => "version-negotiation",
 110                         "client" => {
 111                             "MinProtocol" => $min_protocols[$c_min],
 112                             "MaxProtocol" => $max_protocols[$c_max],
 113                         },
 114                         "server" => {
 115                             "MinProtocol" => $min_protocols[$s_min],
 116                             "MaxProtocol" => $max_protocols[$s_max],
 117                         },
 118                         "test" => {
 119                             "ExpectedResult" => $result,
 120                             "ExpectedProtocol" => $protocol,
 121                             "Method" => $method,
 122                         }
 123                     };
 124                 }
 125             }
 126         }
 127     }
 128     return @tests;
 129 }
 130
 131 sub generate_resumption_tests {
 132     my ($method) = @_;
 133
 134     my $dtls = $method eq "DTLS";
 135     # Don't write the redundant "Method = TLS" into the configuration.
 136     undef $method if !$dtls;
 137
 138     my @protocols = $dtls ? @dtls_protocols : @tls_protocols;
 139     my $min_enabled  = $dtls ? $min_dtls_enabled : $min_tls_enabled;
 140
 141     if (no_tests($dtls)) {
 142         return;
 143     }
 144
 145     my @server_tests = ();
 146     my @client_tests = ();
 147
 148     # Obtain the first session against a fixed-version server/client.
 149     foreach my $original_protocol($min_enabled..$#protocols) {
 150         # Upgrade or downgrade the server/client max version support and test
 151         # that it upgrades, downgrades or resumes the session as well.
 152         foreach my $resume_protocol($min_enabled..$#protocols) {
 153             my $resumption_expected;
 154             # We should only resume on exact version match.
 155             if ($original_protocol eq $resume_protocol) {
 156                 $resumption_expected = "Yes";
 157             } else {
 158                 $resumption_expected = "No";
 159             }
 160
 161             foreach my $ticket ("SessionTicket", "-SessionTicket") {
 162                 # Client is flexible, server upgrades/downgrades.
 163                 push @server_tests, {
 164                     "name" => "resumption",
 165                     "client" => { },
 166                     "server" => {
 167                         "MinProtocol" => $protocols[$original_protocol],
 168                         "MaxProtocol" => $protocols[$original_protocol],
 169                         "Options" => $ticket,
 170                     },
 171                     "resume_server" => {
 172                         "MaxProtocol" => $protocols[$resume_protocol],
 173                     },
 174                     "test" => {
 175                         "ExpectedProtocol" => $protocols[$resume_protocol],
 176                         "Method" => $method,
 177                         "HandshakeMode" => "Resume",
 178                         "ResumptionExpected" => $resumption_expected,
 179                     }
 180                 };
 181                 # Server is flexible, client upgrades/downgrades.
 182                 push @client_tests, {
 183                     "name" => "resumption",
 184                     "client" => {
 185                         "MinProtocol" => $protocols[$original_protocol],
 186                         "MaxProtocol" => $protocols[$original_protocol],
 187                     },
 188                     "server" => {
 189                         "Options" => $ticket,
 190                     },
 191                     "resume_client" => {
 192                         "MaxProtocol" => $protocols[$resume_protocol],
 193                     },
 194                     "test" => {
 195                         "ExpectedProtocol" => $protocols[$resume_protocol],
 196                         "Method" => $method,
 197                         "HandshakeMode" => "Resume",
 198                         "ResumptionExpected" => $resumption_expected,
 199                     }
 200                 };
 201             }
 202         }
 203     }
 204
 205     return (@server_tests, @client_tests);
 206 }
 207
 208 sub expected_result {
 209     my ($c_min, $c_max, $s_min, $s_max, $min_enabled, $max_enabled,
 210         $protocols) = @_;
 211
 212     # Adjust for "undef" (no limit).
 213     $c_min = $c_min == 0 ? 0 : $c_min - 1;
 214     $c_max = $c_max == scalar @$protocols ? $c_max - 1 : $c_max;
 215     $s_min = $s_min == 0 ? 0 : $s_min - 1;
 216     $s_max = $s_max == scalar @$protocols ? $s_max - 1 : $s_max;
 217
 218     # We now have at least one protocol enabled, so $min_enabled and
 219     # $max_enabled are well-defined.
 220     $c_min = max $c_min, $min_enabled;
 221     $s_min = max $s_min, $min_enabled;
 222     $c_max = min $c_max, $max_enabled;
 223     $s_max = min $s_max, $max_enabled;
 224
 225     if ($c_min > $c_max) {
 226         # Client should fail to even send a hello.
 227         # This results in an internal error since the server will be
 228         # waiting for input that never arrives.
 229         return ("InternalError", undef);
 230     } elsif ($s_min > $s_max) {
 231         # Server has no protocols, should always fail.
 232         return ("ServerFail", undef);
 233     } elsif ($s_min > $c_max) {
 234         # Server doesn't support the client range.
 235         return ("ServerFail", undef);
 236     } elsif ($c_min > $s_max) {
 237         # Server will try with a version that is lower than the lowest
 238         # supported client version.
 239         return ("ClientFail", undef);
 240     } else {
 241         # Server and client ranges overlap.
 242         my $max_common = $s_max < $c_max ? $s_max : $c_max;
 243         return ("Success", $protocols->[$max_common]);
 244     }
 245 }
 246
 247 1;