1#!/usr/bin/env perl
2
3# key-exchanges.pl
4#
5# Copyright The Mbed TLS Contributors
6# SPDX-License-Identifier: Apache-2.0
7#
8# Licensed under the Apache License, Version 2.0 (the "License"); you may
9# not use this file except in compliance with the License.
10# You may obtain a copy of the License at
11#
12# http://www.apache.org/licenses/LICENSE-2.0
13#
14# Unless required by applicable law or agreed to in writing, software
15# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
16# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17# See the License for the specific language governing permissions and
18# limitations under the License.
19#
20# Purpose
21#
22# To test the code dependencies on individual key exchanges in the SSL module.
23# is a verification step to ensure we don't ship SSL code that do not work
24# for some build options.
25#
26# The process is:
27#       for each possible key exchange
28#           build the library with all but that key exchange disabled
29#
30# Usage: tests/scripts/key-exchanges.pl
31#
32# This script should be executed from the root of the project directory.
33#
34# For best effect, run either with cmake disabled, or cmake enabled in a mode
35# that includes -Werror.
36
37use warnings;
38use strict;
39
40-d 'library' && -d 'include' && -d 'tests' or die "Must be run from root\n";
41
42my $sed_cmd = 's/^#define \(MBEDTLS_KEY_EXCHANGE_.*_ENABLED\)/\1/p';
43my $config_h = 'include/mbedtls/mbedtls_config.h';
44my @kexes = split( /\s+/, `sed -n -e '$sed_cmd' $config_h` );
45
46system( "cp $config_h $config_h.bak" ) and die;
47sub abort {
48    system( "mv $config_h.bak $config_h" ) and warn "$config_h not restored\n";
49    # use an exit code between 1 and 124 for git bisect (die returns 255)
50    warn $_[0];
51    exit 1;
52}
53
54for my $kex (@kexes) {
55    system( "cp $config_h.bak $config_h" ) and die "$config_h not restored\n";
56    system( "make clean" ) and die;
57
58    print "\n******************************************\n";
59    print "* Testing with key exchange: $kex\n";
60    print "******************************************\n";
61    $ENV{MBEDTLS_TEST_CONFIGURATION} = $kex;
62
63    # full config with all key exchanges disabled except one
64    system( "scripts/config.py full" ) and abort "Failed config full\n";
65    for my $k (@kexes) {
66        next if $k eq $kex;
67        system( "scripts/config.py unset $k" )
68            and abort "Failed to disable $k\n";
69    }
70
71    system( "make lib CFLAGS='-Os -Werror'" ) and abort "Failed to build lib: $kex\n";
72}
73
74system( "mv $config_h.bak $config_h" ) and die "$config_h not restored\n";
75system( "make clean" ) and die;
76exit 0;
77