openssl/test/recipes/70-test_sslskewith0p.t

#!/usr/bin/perl
# Written by Matt Caswell for the OpenSSL project.
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use strict;
use OpenSSL::Test qw/:DEFAULT cmdstr top_file top_dir/;
use OpenSSL::Test::Utils;
use TLSProxy::Proxy;

my $test_name = "test_sslskewith0p";
setup($test_name);

plan skip_all => "TLSProxy isn't usable on $^O"
    if $^O =~ /^VMS$/;

plan skip_all => "$test_name needs the engine feature enabled"
    if disabled("engine");

plan skip_all => "$test_name can only be performed with OpenSSL configured shared"
    if disabled("shared");

plan skip_all => "dh is not supported by this OpenSSL build"
    if disabled("dh");

$ENV{OPENSSL_ENGINES} = top_dir("engines");
$ENV{OPENSSL_ia32cap} = '~0x200000200000000';
my $proxy = TLSProxy::Proxy->new(
    \&ske_0_p_filter,
    cmdstr(app(["openssl"])),
    top_file("apps", "server.pem")
);

plan tests => 1;

#We must use an anon DHE cipher for this test
$proxy->cipherc('ADH-AES128-SHA:@SECLEVEL=0');
$proxy->ciphers('ADH-AES128-SHA:@SECLEVEL=0');

$proxy->start();
ok(TLSProxy::Message->fail, "ServerKeyExchange with 0 p");

sub ske_0_p_filter
{
    my $proxy = shift;

    # We're only interested in the SKE - always in flight 1
    if ($proxy->flight != 1) {
        return;
    }

    foreach my $message (@{$proxy->message_list}) {
        if ($message->mt == TLSProxy::Message::MT_SERVER_KEY_EXCHANGE) {
            #Set p to a value of 0
            $message->p(pack('C', 0));

            $message->repack();
        }
    }
}