#!/usr/bin/perl
# Written by Matt Caswell for the OpenSSL project.
# ====================================================================
# Copyright (c) 1998-2015 The OpenSSL Project.  All rights reserved.
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# modification, are permitted provided that the following conditions
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# 3. All advertising materials mentioning features or use of this
#    software must display the following acknowledgment:
#    "This product includes software developed by the OpenSSL Project
#    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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#    openssl-core@openssl.org.
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#    acknowledgment:
#    "This product includes software developed by the OpenSSL Project
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# ====================================================================
#
# This product includes cryptographic software written by Eric Young
# (eay@cryptsoft.com).  This product includes software written by Tim
# Hudson (tjh@cryptsoft.com).

use strict;
use TLSProxy::Proxy;

my $proxy = TLSProxy::Proxy->new(
    \&ske_0_p_filter,
    @ARGV
);

#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();
TLSProxy::Message->fail or die "FAILED: ServerKeyExchange with 0 p\n";

print "SUCCESS: ServerKeyExchange with 0 p\n";

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();
        }
    }
}