* @copyright 2005-2008 Janrain, Inc. * @license http://www.apache.org/licenses/LICENSE-2.0 Apache */ require_once 'Auth/OpenID.php'; require_once 'Auth/OpenID/BigMath.php'; function Auth_OpenID_getDefaultMod() { return '155172898181473697471232257763715539915724801'. '966915404479707795314057629378541917580651227423'. '698188993727816152646631438561595825688188889951'. '272158842675419950341258706556549803580104870537'. '681476726513255747040765857479291291572334510643'. '245094715007229621094194349783925984760375594985'. '848253359305585439638443'; } function Auth_OpenID_getDefaultGen() { return '2'; } /** * The Diffie-Hellman key exchange class. This class relies on * {@link Auth_OpenID_MathLibrary} to perform large number operations. * * @access private * @package OpenID */ class Auth_OpenID_DiffieHellman { public $mod; public $gen; public $private; /** @var Auth_OpenID_BcMathWrapper */ public $lib = null; function __construct($mod = null, $gen = null, $private = null, $lib = null) { if ($lib === null) { $this->lib = Auth_OpenID_getMathLib(); } else { $this->lib = $lib; } if ($mod === null) { $this->mod = $this->lib->init(Auth_OpenID_getDefaultMod()); } else { $this->mod = $mod; } if ($gen === null) { $this->gen = $this->lib->init(Auth_OpenID_getDefaultGen()); } else { $this->gen = $gen; } if ($private === null) { $r = $this->lib->rand($this->mod); $this->private = $this->lib->add($r, 1); } else { $this->private = $private; } $this->public = $this->lib->powmod($this->gen, $this->private, $this->mod); } function getSharedSecret($composite) { return $this->lib->powmod($composite, $this->private, $this->mod); } function getPublicKey() { return $this->public; } function usingDefaultValues() { return ($this->mod == Auth_OpenID_getDefaultMod() && $this->gen == Auth_OpenID_getDefaultGen()); } function xorSecret($composite, $secret, $hash_func) { $dh_shared = $this->getSharedSecret($composite); $dh_shared_str = $this->lib->longToBinary($dh_shared); $hash_dh_shared = $hash_func($dh_shared_str); $xsecret = ""; for ($i = 0; $i < Auth_OpenID::bytes($secret); $i++) { $xsecret .= chr(ord($secret[$i]) ^ ord($hash_dh_shared[$i])); } return $xsecret; } }