function runTest()
{
$lib =& Auth_OpenID_getMathLib();
$shared = $lib->init($this->shared);
$dh1 = new Auth_OpenID_DiffieHellman(null, null, $this->p1);
$dh2 = new Auth_OpenID_DiffieHellman(null, null, $this->p2);
$sh1 = $dh1->getSharedSecret($dh2->getPublicKey());
$sh2 = $dh2->getSharedSecret($dh1->getPublicKey());
$this->assertEquals($lib->cmp($shared, $sh1), 0);
$this->assertEquals($lib->cmp($shared, $sh2), 0);
}
/**
* Perform the server side of the OpenID Diffie-Hellman association
*/
function serverAssociate($consumer_args, $assoc_secret)
{
$lib =& Auth_OpenID_getMathLib();
if (isset($consumer_args['openid.dh_modulus'])) {
$mod = $lib->base64ToLong($consumer_args['openid.dh_modulus']);
} else {
$mod = null;
}
if (isset($consumer_args['openid.dh_gen'])) {
$gen = $lib->base64ToLong($consumer_args['openid.dh_gen']);
} else {
$gen = null;
}
$cpub64 = @$consumer_args['openid.dh_consumer_public'];
if (!isset($cpub64)) {
return false;
}
$dh = new Auth_OpenID_DiffieHellman($mod, $gen);
$cpub = $lib->base64ToLong($cpub64);
$mac_key = $dh->xorSecret($cpub, $assoc_secret);
$enc_mac_key = base64_encode($mac_key);
$spub64 = $lib->longToBase64($dh->getPublicKey());
$server_args = array('session_type' => 'DH-SHA1', 'dh_server_public' => $spub64, 'enc_mac_key' => $enc_mac_key);
return $server_args;
}