/**
* Initialize the diffie-hellman parameters for the association request.
*
* @return void
*/
public function init()
{
if ($this->cdh === null) {
$this->cdh = new Crypt_DiffieHellman(self::DH_DEFAULT_MODULUS, self::DH_DEFAULT_GENERATOR);
$this->cdh->generateKeys();
}
// Set public key
$this->message->set('openid.dh_consumer_public', base64_encode($this->cdh->getPublicKey(Crypt_DiffieHellman::BTWOC)));
// Set modulus
$prime = $this->cdh->getPrime(Crypt_DiffieHellman::BTWOC);
$this->message->set('openid.dh_modulus', base64_encode($prime));
// Set prime
$gen = $this->cdh->getGenerator(Crypt_DiffieHellman::BTWOC);
$this->message->set('openid.dh_gen', base64_encode($gen));
}
