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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_OpenId
* @subpackage Zend_OpenId_Provider
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Provider.php 16212 2009-06-21 19:24:49Z thomas $
*/
/**
* @see Zend_OpenId
*/
require_once "Zend/OpenId.php";
/**
* @see Zend_OpenId_Extension
*/
require_once "Zend/OpenId/Extension.php";
/**
* OpenID provider (server) implementation
*
* @category Zend
* @package Zend_OpenId
* @subpackage Zend_OpenId_Provider
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_OpenId_Provider
{
/**
* Reference to an implementation of storage object
*
* @var Zend_OpenId_Provider_Storage $_storage
*/
private $_storage;
/**
* Reference to an implementation of user object
*
* @var Zend_OpenId_Provider_User $_user
*/
private $_user;
/**
* Time to live of association session in secconds
*
* @var integer $_sessionTtl
*/
private $_sessionTtl;
/**
* URL to peform interactive user login
*
* @var string $_loginUrl
*/
private $_loginUrl;
/**
* URL to peform interactive validation of consumer by user
*
* @var string $_trustUrl
*/
private $_trustUrl;
/**
* The OP Endpoint URL
*
* @var string $_opEndpoint
*/
private $_opEndpoint;
/**
* Constructs a Zend_OpenId_Provider object with given parameters.
*
* @param string $loginUrl is an URL that provides login screen for
* end-user (by default it is the same URL with additional GET variable
* openid.action=login)
* @param string $trustUrl is an URL that shows a question if end-user
* trust to given consumer (by default it is the same URL with additional
* GET variable openid.action=trust)
* @param Zend_OpenId_Provider_User $user is an object for communication
* with User-Agent and store information about logged-in user (it is a
* Zend_OpenId_Provider_User_Session object by default)
* @param Zend_OpenId_Provider_Storage $storage is an object for keeping
* persistent database (it is a Zend_OpenId_Provider_Storage_File object
* by default)
* @param integer $sessionTtl is a default time to live for association
* session in seconds (1 hour by default). Consumer must reestablish
* association after that time.
*/
public function __construct($loginUrl = null,
$trustUrl = null,
Zend_OpenId_Provider_User $user = null,
Zend_OpenId_Provider_Storage $storage = null,
$sessionTtl = 3600)
{
if ($loginUrl === null) {
$loginUrl = Zend_OpenId::selfUrl() . '?openid.action=login';
} else {
$loginUrl = Zend_OpenId::absoluteUrl($loginUrl);
}
$this->_loginUrl = $loginUrl;
if ($trustUrl === null) {
$trustUrl = Zend_OpenId::selfUrl() . '?openid.action=trust';
} else {
$trustUrl = Zend_OpenId::absoluteUrl($trustUrl);
}
$this->_trustUrl = $trustUrl;
if ($user === null) {
require_once "Zend/OpenId/Provider/User/Session.php";
$this->_user = new Zend_OpenId_Provider_User_Session();
} else {
$this->_user = $user;
}
if ($storage === null) {
require_once "Zend/OpenId/Provider/Storage/File.php";
$this->_storage = new Zend_OpenId_Provider_Storage_File();
} else {
$this->_storage = $storage;
}
$this->_sessionTtl = $sessionTtl;
}
/**
* Sets the OP Endpoint URL
*
* @param string $url the OP Endpoint URL
* @return null
*/
public function setOpEndpoint($url)
{
$this->_opEndpoint = $url;
}
/**
* Registers a new user with given $id and $password
* Returns true in case of success and false if user with given $id already
* exists
*
* @param string $id user identity URL
* @param string $password encoded user password
* @return bool
*/
public function register($id, $password)
{
if (!Zend_OpenId::normalize($id) || empty($id)) {
return false;
}
return $this->_storage->addUser($id, md5($id.$password));
}
/**
* Returns true if user with given $id exists and false otherwise
*
* @param string $id user identity URL
* @return bool
*/
public function hasUser($id) {
if (!Zend_OpenId::normalize($id)) {
return false;
}
return $this->_storage->hasUser($id);
}
/**
* Performs login of user with given $id and $password
* Returns true in case of success and false otherwise
*
* @param string $id user identity URL
* @param string $password user password
* @return bool
*/
public function login($id, $password)
{
if (!Zend_OpenId::normalize($id)) {
return false;
}
if (!$this->_storage->checkUser($id, md5($id.$password))) {
return false;
}
$this->_user->setLoggedInUser($id);
return true;
}
/**
* Performs logout. Clears information about logged in user.
*
* @return void
*/
public function logout()
{
$this->_user->delLoggedInUser();
return true;
}
/**
* Returns identity URL of current logged in user or false
*
* @return mixed
*/
public function getLoggedInUser() {
return $this->_user->getLoggedInUser();
}
/**
* Retrieve consumer's root URL from request query.
* Returns URL or false in case of failure
*
* @param array $params query arguments
* @return mixed
*/
public function getSiteRoot($params)
{
$version = 1.1;
if (isset($params['openid_ns']) &&
$params['openid_ns'] == Zend_OpenId::NS_2_0) {
$version = 2.0;
}
if ($version >= 2.0 && isset($params['openid_realm'])) {
$root = $params['openid_realm'];
} else if ($version < 2.0 && isset($params['openid_trust_root'])) {
$root = $params['openid_trust_root'];
} else if (isset($params['openid_return_to'])) {
$root = $params['openid_return_to'];
} else {
return false;
}
if (Zend_OpenId::normalizeUrl($root) && !empty($root)) {
return $root;
}
return false;
}
/**
* Allows consumer with given root URL to authenticate current logged
* in user. Returns true on success and false on error.
*
* @param string $root root URL
* @param mixed $extensions extension object or array of extensions objects
* @return bool
*/
public function allowSite($root, $extensions=null)
{
$id = $this->getLoggedInUser();
if ($id === false) {
return false;
}
if ($extensions !== null) {
$data = array();
Zend_OpenId_Extension::forAll($extensions, 'getTrustData', $data);
} else {
$data = true;
}
$this->_storage->addSite($id, $root, $data);
return true;
}
/**
* Prohibit consumer with given root URL to authenticate current logged
* in user. Returns true on success and false on error.
*
* @param string $root root URL
* @return bool
*/
public function denySite($root)
{
$id = $this->getLoggedInUser();
if ($id === false) {
return false;
}
$this->_storage->addSite($id, $root, false);
return true;
}
/**
* Delete consumer with given root URL from known sites of current logged
* in user. Next time this consumer will try to authenticate the user,
* Provider will ask user's confirmation.
* Returns true on success and false on error.
*
* @param string $root root URL
* @return bool
*/
public function delSite($root)
{
$id = $this->getLoggedInUser();
if ($id === false) {
return false;
}
$this->_storage->addSite($id, $root, null);
return true;
}
/**
* Returns list of known consumers for current logged in user or false
* if he is not logged in.
*
* @return mixed
*/
public function getTrustedSites()
{
$id = $this->getLoggedInUser();
if ($id === false) {
return false;
}
return $this->_storage->getTrustedSites($id);
}
/**
* Handles HTTP request from consumer
*
* @param array $params GET or POST variables. If this parameter is omited
* or set to null, then $_GET or $_POST superglobal variable is used
* according to REQUEST_METHOD.
* @param mixed $extensions extension object or array of extensions objects
* @param Zend_Controller_Response_Abstract $response an optional response
* object to perform HTTP or HTML form redirection
* @return mixed
*/
public function handle($params=null, $extensions=null,
Zend_Controller_Response_Abstract $response = null)
{
if ($params === null) {
if ($_SERVER["REQUEST_METHOD"] == "GET") {
$params = $_GET;
} else if ($_SERVER["REQUEST_METHOD"] == "POST") {
$params = $_POST;
} else {
return false;
}
}
$version = 1.1;
if (isset($params['openid_ns']) &&
$params['openid_ns'] == Zend_OpenId::NS_2_0) {
$version = 2.0;
}
if (isset($params['openid_mode'])) {
if ($params['openid_mode'] == 'associate') {
$response = $this->_associate($version, $params);
$ret = '';
foreach ($response as $key => $val) {
$ret .= $key . ':' . $val . "\n";
}
return $ret;
} else if ($params['openid_mode'] == 'checkid_immediate') {
$ret = $this->_checkId($version, $params, 1, $extensions, $response);
if (is_bool($ret)) return $ret;
if (!empty($params['openid_return_to'])) {
Zend_OpenId::redirect($params['openid_return_to'], $ret, $response);
}
return true;
} else if ($params['openid_mode'] == 'checkid_setup') {
$ret = $this->_checkId($version, $params, 0, $extensions, $response);
if (is_bool($ret)) return $ret;
if (!empty($params['openid_return_to'])) {
Zend_OpenId::redirect($params['openid_return_to'], $ret, $response);
}
return true;
} else if ($params['openid_mode'] == 'check_authentication') {
$response = $this->_checkAuthentication($version, $params);
$ret = '';
foreach ($response as $key => $val) {
$ret .= $key . ':' . $val . "\n";
}
return $ret;
}
}
return false;
}
/**
* Generates a secret key for given hash function, returns RAW key or false
* if function is not supported
*
* @param string $func hash function (sha1 or sha256)
* @return mixed
*/
protected function _genSecret($func)
{
if ($func == 'sha1') {
$macLen = 20; /* 160 bit */
} else if ($func == 'sha256') {
$macLen = 32; /* 256 bit */
} else {
return false;
}
return Zend_OpenId::randomBytes($macLen);
}
/**
* Processes association request from OpenID consumerm generates secret
* shared key and send it back using Diffie-Hellman encruption.
* Returns array of variables to push back to consumer.
*
* @param float $version OpenID version
* @param array $params GET or POST request variables
* @return array
*/
protected function _associate($version, $params)
{
$ret = array();
if ($version >= 2.0) {
$ret['ns'] = Zend_OpenId::NS_2_0;
}
if (isset($params['openid_assoc_type']) &&
$params['openid_assoc_type'] == 'HMAC-SHA1') {
$macFunc = 'sha1';
} else if (isset($params['openid_assoc_type']) &&
$params['openid_assoc_type'] == 'HMAC-SHA256' &&
$version >= 2.0) {
$macFunc = 'sha256';
} else {
$ret['error'] = 'Wrong "openid.assoc_type"';
$ret['error-code'] = 'unsupported-type';
return $ret;
}
$ret['assoc_type'] = $params['openid_assoc_type'];
$secret = $this->_genSecret($macFunc);
if (empty($params['openid_session_type']) ||
$params['openid_session_type'] == 'no-encryption') {
$ret['mac_key'] = base64_encode($secret);
} else if (isset($params['openid_session_type']) &&
$params['openid_session_type'] == 'DH-SHA1') {
$dhFunc = 'sha1';
} else if (isset($params['openid_session_type']) &&
$params['openid_session_type'] == 'DH-SHA256' &&
$version >= 2.0) {
$dhFunc = 'sha256';
} else {
$ret['error'] = 'Wrong "openid.session_type"';
$ret['error-code'] = 'unsupported-type';
return $ret;
}
if (isset($params['openid_session_type'])) {
$ret['session_type'] = $params['openid_session_type'];
}
if (isset($dhFunc)) {
if (empty($params['openid_dh_consumer_public'])) {
$ret['error'] = 'Wrong "openid.dh_consumer_public"';
return $ret;
}
if (empty($params['openid_dh_gen'])) {
$g = pack('H*', Zend_OpenId::DH_G);
} else {
$g = base64_decode($params['openid_dh_gen']);
}
if (empty($params['openid_dh_modulus'])) {
$p = pack('H*', Zend_OpenId::DH_P);
} else {
$p = base64_decode($params['openid_dh_modulus']);
}
$dh = Zend_OpenId::createDhKey($p, $g);
$dh_details = Zend_OpenId::getDhKeyDetails($dh);
$sec = Zend_OpenId::computeDhSecret(
base64_decode($params['openid_dh_consumer_public']), $dh);
if ($sec === false) {
$ret['error'] = 'Wrong "openid.session_type"';
$ret['error-code'] = 'unsupported-type';
return $ret;
}
$sec = Zend_OpenId::digest($dhFunc, $sec);
$ret['dh_server_public'] = base64_encode(
Zend_OpenId::btwoc($dh_details['pub_key']));
$ret['enc_mac_key'] = base64_encode($secret ^ $sec);
}
$handle = uniqid();
$expiresIn = $this->_sessionTtl;
$ret['assoc_handle'] = $handle;
$ret['expires_in'] = $expiresIn;
$this->_storage->addAssociation($handle,
$macFunc, $secret, time() + $expiresIn);
return $ret;
}
/**
* Performs authentication (or authentication check).
*
* @param float $version OpenID version
* @param array $params GET or POST request variables
* @param bool $immediate enables or disables interaction with user
* @param mixed $extensions extension object or array of extensions objects
* @param Zend_Controller_Response_Abstract $response
* @return array
*/
protected function _checkId($version, $params, $immediate, $extensions=null,
Zend_Controller_Response_Abstract $response = null)
{
$ret = array();
if ($version >= 2.0) {
$ret['openid.ns'] = Zend_OpenId::NS_2_0;
}
$root = $this->getSiteRoot($params);
if ($root === false) {
return false;
}
if (isset($params['openid_identity']) &&
!$this->_storage->hasUser($params['openid_identity'])) {
$ret['openid.mode'] = ($immediate && $version >= 2.0) ? 'setup_needed': 'cancel';
return $ret;
}
/* Check if user already logged in into the server */
if (!isset($params['openid_identity']) ||
$this->_user->getLoggedInUser() !== $params['openid_identity']) {
$params2 = array();
foreach ($params as $key => $val) {
if (strpos($key, 'openid_ns_') === 0) {
$key = 'openid.ns.' . substr($key, strlen('openid_ns_'));
} else if (strpos($key, 'openid_sreg_') === 0) {
$key = 'openid.sreg.' . substr($key, strlen('openid_sreg_'));
} else if (strpos($key, 'openid_') === 0) {
$key = 'openid.' . substr($key, strlen('openid_'));
}
$params2[$key] = $val;
}
if ($immediate) {
$params2['openid.mode'] = 'checkid_setup';
$ret['openid.mode'] = ($version >= 2.0) ? 'setup_needed': 'id_res';
$ret['openid.user_setup_url'] = $this->_loginUrl
. (strpos($this->_loginUrl, '?') === false ? '?' : '&')
. Zend_OpenId::paramsToQuery($params2);
return $ret;
} else {
/* Redirect to Server Login Screen */
Zend_OpenId::redirect($this->_loginUrl, $params2, $response);
return true;
}
}
if (!Zend_OpenId_Extension::forAll($extensions, 'parseRequest', $params)) {
$ret['openid.mode'] = ($immediate && $version >= 2.0) ? 'setup_needed': 'cancel';
return $ret;
}
/* Check if user trusts to the consumer */
$trusted = null;
$sites = $this->_storage->getTrustedSites($params['openid_identity']);
if (isset($params['openid_return_to'])) {
$root = $params['openid_return_to'];
}
if (isset($sites[$root])) {
$trusted = $sites[$root];
} else {
foreach ($sites as $site => $t) {
if (strpos($root, $site) === 0) {
$trusted = $t;
break;
} else {
/* OpenID 2.0 (9.2) check for realm wild-card matching */
$n = strpos($site, '://*.');
if ($n != false) {
$regex = '/^'
. preg_quote(substr($site, 0, $n+3), '/')
. '[A-Za-z1-9_\.]+?'
. preg_quote(substr($site, $n+4), '/')
. '/';
if (preg_match($regex, $root)) {
$trusted = $t;
break;
}
}
}
}
}
if (is_array($trusted)) {
if (!Zend_OpenId_Extension::forAll($extensions, 'checkTrustData', $trusted)) {
$trusted = null;
}
}
if ($trusted === false) {
$ret['openid.mode'] = 'cancel';
return $ret;
} else if ($trusted === null) {
/* Redirect to Server Trust Screen */
$params2 = array();
foreach ($params as $key => $val) {
if (strpos($key, 'openid_ns_') === 0) {
$key = 'openid.ns.' . substr($key, strlen('openid_ns_'));
} else if (strpos($key, 'openid_sreg_') === 0) {
$key = 'openid.sreg.' . substr($key, strlen('openid_sreg_'));
} else if (strpos($key, 'openid_') === 0) {
$key = 'openid.' . substr($key, strlen('openid_'));
}
$params2[$key] = $val;
}
if ($immediate) {
$params2['openid.mode'] = 'checkid_setup';
$ret['openid.mode'] = ($version >= 2.0) ? 'setup_needed': 'id_res';
$ret['openid.user_setup_url'] = $this->_trustUrl
. (strpos($this->_trustUrl, '?') === false ? '?' : '&')
. Zend_OpenId::paramsToQuery($params2);
return $ret;
} else {
Zend_OpenId::redirect($this->_trustUrl, $params2, $response);
return true;
}
}
return $this->_respond($version, $ret, $params, $extensions);
}
/**
* Perepares information to send back to consumer's authentication request,
* signs it using shared secret and send back through HTTP redirection
*
* @param array $params GET or POST request variables
* @param mixed $extensions extension object or array of extensions objects
* @param Zend_Controller_Response_Abstract $response an optional response
* object to perform HTTP or HTML form redirection
* @return bool
*/
public function respondToConsumer($params, $extensions=null,
Zend_Controller_Response_Abstract $response = null)
{
$version = 1.1;
if (isset($params['openid_ns']) &&
$params['openid_ns'] == Zend_OpenId::NS_2_0) {
$version = 2.0;
}
$ret = array();
if ($version >= 2.0) {
$ret['openid.ns'] = Zend_OpenId::NS_2_0;
}
$ret = $this->_respond($version, $ret, $params, $extensions);
if (!empty($params['openid_return_to'])) {
Zend_OpenId::redirect($params['openid_return_to'], $ret, $response);
}
return true;
}
/**
* Perepares information to send back to consumer's authentication request
* and signs it using shared secret.
*
* @param float $version OpenID protcol version
* @param array $ret arguments to be send back to consumer
* @param array $params GET or POST request variables
* @param mixed $extensions extension object or array of extensions objects
* @return array
*/
protected function _respond($version, $ret, $params, $extensions=null)
{
if (empty($params['openid_assoc_handle']) ||
!$this->_storage->getAssociation($params['openid_assoc_handle'],
$macFunc, $secret, $expires)) {
/* Use dumb mode */
if (!empty($params['openid_assoc_handle'])) {
$ret['openid.invalidate_handle'] = $params['openid_assoc_handle'];
}
$macFunc = $version >= 2.0 ? 'sha256' : 'sha1';
$secret = $this->_genSecret($macFunc);
$handle = uniqid();
$expiresIn = $this->_sessionTtl;
$this->_storage->addAssociation($handle,
$macFunc, $secret, time() + $expiresIn);
$ret['openid.assoc_handle'] = $handle;
} else {
$ret['openid.assoc_handle'] = $params['openid_assoc_handle'];
}
if (isset($params['openid_return_to'])) {
$ret['openid.return_to'] = $params['openid_return_to'];
}
if (isset($params['openid_claimed_id'])) {
$ret['openid.claimed_id'] = $params['openid_claimed_id'];
}
if (isset($params['openid_identity'])) {
$ret['openid.identity'] = $params['openid_identity'];
}
if ($version >= 2.0) {
if (!empty($this->_opEndpoint)) {
$ret['openid.op_endpoint'] = $this->_opEndpoint;
} else {
$ret['openid.op_endpoint'] = Zend_OpenId::selfUrl();
}
}
$ret['openid.response_nonce'] = gmdate('Y-m-d\TH:i:s\Z') . uniqid();
$ret['openid.mode'] = 'id_res';
Zend_OpenId_Extension::forAll($extensions, 'prepareResponse', $ret);
$signed = '';
$data = '';
foreach ($ret as $key => $val) {
if (strpos($key, 'openid.') === 0) {
$key = substr($key, strlen('openid.'));
if (!empty($signed)) {
$signed .= ',';
}
$signed .= $key;
$data .= $key . ':' . $val . "\n";
}
}
$signed .= ',signed';
$data .= 'signed:' . $signed . "\n";
$ret['openid.signed'] = $signed;
$ret['openid.sig'] = base64_encode(
Zend_OpenId::hashHmac($macFunc, $data, $secret));
return $ret;
}
/**
* Performs authentication validation for dumb consumers
* Returns array of variables to push back to consumer.
* It MUST contain 'is_valid' variable with value 'true' or 'false'.
*
* @param float $version OpenID version
* @param array $params GET or POST request variables
* @return array
*/
protected function _checkAuthentication($version, $params)
{
$ret = array();
if ($version >= 2.0) {
$ret['ns'] = Zend_OpenId::NS_2_0;
}
$ret['openid.mode'] = 'id_res';
if (empty($params['openid_assoc_handle']) ||
empty($params['openid_signed']) ||
empty($params['openid_sig']) ||
!$this->_storage->getAssociation($params['openid_assoc_handle'],
$macFunc, $secret, $expires)) {
$ret['is_valid'] = 'false';
return $ret;
}
$signed = explode(',', $params['openid_signed']);
$data = '';
foreach ($signed as $key) {
$data .= $key . ':';
if ($key == 'mode') {
$data .= "id_res\n";
} else {
$data .= $params['openid_' . strtr($key,'.','_')]."\n";
}
}
if (base64_decode($params['openid_sig']) ===
Zend_OpenId::hashHmac($macFunc, $data, $secret)) {
$ret['is_valid'] = 'true';
} else {
$ret['is_valid'] = 'false';
}
return $ret;
}
}
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