1052 lines
41 KiB
PHP
1052 lines
41 KiB
PHP
<?php
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/**
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* This class provides a simple interface for OpenID 1.1/2.0 authentication.
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*
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* It requires PHP >= 5.1.2 with cURL or HTTP/HTTPS stream wrappers enabled.
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*
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* @version v1.2.0 (2014-01-14)
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* @link https://code.google.com/p/lightopenid/ Project URL
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* @link https://github.com/iignatov/LightOpenID GitHub Repo
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* @author Mewp <mewp151 at gmail dot com>
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* @copyright Copyright (c) 2013 Mewp
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* @license http://opensource.org/licenses/mit-license.php MIT License
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*/
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class LightOpenID
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{
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public $returnUrl
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, $required = array()
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, $optional = array()
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, $verify_peer = null
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, $capath = null
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, $cainfo = null
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, $cnmatch = null
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, $data
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, $oauth = array()
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, $curl_time_out = 30
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, $curl_connect_time_out = 30;
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private $identity, $claimed_id;
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protected $server, $version, $trustRoot, $aliases, $identifier_select = false
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, $ax = false, $sreg = false, $setup_url = null, $headers = array()
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, $proxy = null, $user_agent = 'LightOpenID'
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, $xrds_override_pattern = null, $xrds_override_replacement = null;
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static protected $ax_to_sreg = array(
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'namePerson/friendly' => 'nickname',
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'contact/email' => 'email',
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'namePerson' => 'fullname',
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'birthDate' => 'dob',
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'person/gender' => 'gender',
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'contact/postalCode/home' => 'postcode',
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'contact/country/home' => 'country',
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'pref/language' => 'language',
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'pref/timezone' => 'timezone',
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);
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function __construct($host, $proxy = null)
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{
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$this->set_realm($host);
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$this->set_proxy($proxy);
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$uri = rtrim(preg_replace('#((?<=\?)|&)openid\.[^&]+#', '', $_SERVER['REQUEST_URI']), '?');
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$this->returnUrl = $this->trustRoot . $uri;
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$this->data = ($_SERVER['REQUEST_METHOD'] === 'POST') ? $_POST : $_GET;
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if(!function_exists('curl_init') && !in_array('https', stream_get_wrappers())) {
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throw new ErrorException('You must have either https wrappers or curl enabled.');
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}
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}
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function __isset($name)
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{
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return in_array($name, array('identity', 'trustRoot', 'realm', 'xrdsOverride', 'mode'));
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}
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function __set($name, $value)
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{
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switch ($name) {
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case 'identity':
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if (strlen($value = trim((String) $value))) {
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if (preg_match('#^xri:/*#i', $value, $m)) {
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$value = substr($value, strlen($m[0]));
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} elseif (!preg_match('/^(?:[=@+\$!\(]|https?:)/i', $value)) {
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$value = "http://$value";
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}
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if (preg_match('#^https?://[^/]+$#i', $value, $m)) {
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$value .= '/';
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}
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}
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$this->$name = $this->claimed_id = $value;
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break;
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case 'trustRoot':
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case 'realm':
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$this->trustRoot = trim($value);
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break;
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case 'xrdsOverride':
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if (is_array($value)) {
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list($pattern, $replacement) = $value;
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$this->xrds_override_pattern = $pattern;
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$this->xrds_override_replacement = $replacement;
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} else {
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trigger_error('Invalid value specified for "xrdsOverride".', E_USER_ERROR);
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}
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break;
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}
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}
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function __get($name)
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{
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switch ($name) {
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case 'identity':
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# We return claimed_id instead of identity,
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# because the developer should see the claimed identifier,
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# i.e. what he set as identity, not the op-local identifier (which is what we verify)
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return $this->claimed_id;
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case 'trustRoot':
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case 'realm':
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return $this->trustRoot;
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case 'mode':
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return empty($this->data['openid_mode']) ? null : $this->data['openid_mode'];
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}
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}
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function set_proxy($proxy)
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{
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if (!empty($proxy)) {
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// When the proxy is a string - try to parse it.
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if (!is_array($proxy)) {
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$proxy = parse_url($proxy);
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}
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// Check if $proxy is valid after the parsing.
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if ($proxy && !empty($proxy['host'])) {
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// Make sure that a valid port number is specified.
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if (array_key_exists('port', $proxy)) {
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if (!is_int($proxy['port'])) {
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$proxy['port'] = is_numeric($proxy['port']) ? intval($proxy['port']) : 0;
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}
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if ($proxy['port'] <= 0) {
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throw new ErrorException('The specified proxy port number is invalid.');
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}
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}
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$this->proxy = $proxy;
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}
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}
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}
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/**
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* Checks if the server specified in the url exists.
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*
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* @param $url url to check
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* @return true, if the server exists; false otherwise
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*/
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function hostExists($url)
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{
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if (strpos($url, '/') === false) {
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$server = $url;
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} else {
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$server = @parse_url($url, PHP_URL_HOST);
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}
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if (!$server) {
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return false;
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}
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return !!gethostbynamel($server);
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}
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protected function set_realm($uri)
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{
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$realm = '';
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# Set a protocol, if not specified.
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$realm .= (($offset = strpos($uri, '://')) === false) ? $this->get_realm_protocol() : '';
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# Set the offset properly.
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$offset = (($offset !== false) ? $offset + 3 : 0);
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# Get only the root, without the path.
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$realm .= (($end = strpos($uri, '/', $offset)) === false) ? $uri : substr($uri, 0, $end);
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$this->trustRoot = $realm;
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}
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protected function get_realm_protocol()
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{
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if (!empty($_SERVER['HTTPS'])) {
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$use_secure_protocol = ($_SERVER['HTTPS'] != 'off');
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} else if (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])) {
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$use_secure_protocol = ($_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https');
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} else {
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$use_secure_protocol = false;
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}
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return $use_secure_protocol ? 'https://' : 'http://';
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}
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protected function request_curl($url, $method='GET', $params=array(), $update_claimed_id)
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{
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$params = http_build_query($params, '', '&');
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$curl = curl_init($url . ($method == 'GET' && $params ? '?' . $params : ''));
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curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
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curl_setopt($curl, CURLOPT_HEADER, false);
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curl_setopt($curl, CURLOPT_USERAGENT, $this->user_agent);
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curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
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curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($curl, CURLOPT_TIMEOUT, $this->curl_time_out);
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curl_setopt($curl, CURLOPT_CONNECTTIMEOUT , $this->curl_connect_time_out);
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if ($method == 'POST') {
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curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-type: application/x-www-form-urlencoded'));
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} else {
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curl_setopt($curl, CURLOPT_HTTPHEADER, array('Accept: application/xrds+xml, */*'));
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}
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if (!empty($this->proxy)) {
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curl_setopt($curl, CURLOPT_PROXY, $this->proxy['host']);
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if (!empty($this->proxy['port'])) {
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curl_setopt($curl, CURLOPT_PROXYPORT, $this->proxy['port']);
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}
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if (!empty($this->proxy['user'])) {
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curl_setopt($curl, CURLOPT_PROXYUSERPWD, $this->proxy['user'] . ':' . $this->proxy['pass']);
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}
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}
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if($this->verify_peer !== null) {
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curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, $this->verify_peer);
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if($this->capath) {
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curl_setopt($curl, CURLOPT_CAPATH, $this->capath);
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}
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if($this->cainfo) {
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curl_setopt($curl, CURLOPT_CAINFO, $this->cainfo);
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}
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}
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if ($method == 'POST') {
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curl_setopt($curl, CURLOPT_POST, true);
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curl_setopt($curl, CURLOPT_POSTFIELDS, $params);
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} elseif ($method == 'HEAD') {
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curl_setopt($curl, CURLOPT_HEADER, true);
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curl_setopt($curl, CURLOPT_NOBODY, true);
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} else {
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curl_setopt($curl, CURLOPT_HEADER, true);
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curl_setopt($curl, CURLOPT_HTTPGET, true);
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}
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$response = curl_exec($curl);
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if($method == 'HEAD' && curl_getinfo($curl, CURLINFO_HTTP_CODE) == 405) {
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curl_setopt($curl, CURLOPT_HTTPGET, true);
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$response = curl_exec($curl);
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$response = substr($response, 0, strpos($response, "\r\n\r\n"));
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}
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if($method == 'HEAD' || $method == 'GET') {
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$header_response = $response;
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# If it's a GET request, we want to only parse the header part.
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if($method == 'GET') {
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$header_response = substr($response, 0, strpos($response, "\r\n\r\n"));
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}
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$headers = array();
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foreach(explode("\n", $header_response) as $header) {
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$pos = strpos($header,':');
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if ($pos !== false) {
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$name = strtolower(trim(substr($header, 0, $pos)));
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$headers[$name] = trim(substr($header, $pos+1));
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}
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}
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if($update_claimed_id) {
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# Update the claimed_id value in case of redirections.
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$effective_url = curl_getinfo($curl, CURLINFO_EFFECTIVE_URL);
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# Ignore the fragment (some cURL versions don't handle it well).
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if (strtok($effective_url, '#') != strtok($url, '#')) {
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$this->identity = $this->claimed_id = $effective_url;
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}
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}
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if($method == 'HEAD') {
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return $headers;
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} else {
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$this->headers = $headers;
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}
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}
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if (curl_errno($curl)) {
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throw new ErrorException(curl_error($curl), curl_errno($curl));
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}
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return $response;
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}
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protected function parse_header_array($array, $update_claimed_id)
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{
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$headers = array();
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foreach($array as $header) {
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$pos = strpos($header,':');
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if ($pos !== false) {
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$name = strtolower(trim(substr($header, 0, $pos)));
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$headers[$name] = trim(substr($header, $pos+1));
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# Following possible redirections. The point is just to have
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# claimed_id change with them, because the redirections
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# are followed automatically.
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# We ignore redirections with relative paths.
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# If any known provider uses them, file a bug report.
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if($name == 'location' && $update_claimed_id) {
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if(strpos($headers[$name], 'http') === 0) {
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$this->identity = $this->claimed_id = $headers[$name];
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} elseif($headers[$name][0] == '/') {
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$parsed_url = parse_url($this->claimed_id);
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$this->identity =
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$this->claimed_id = $parsed_url['scheme'] . '://'
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. $parsed_url['host']
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. $headers[$name];
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}
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}
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}
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}
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return $headers;
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}
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protected function request_streams($url, $method='GET', $params=array(), $update_claimed_id)
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{
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if(!$this->hostExists($url)) {
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throw new ErrorException("Could not connect to $url.", 404);
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}
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if (empty($this->cnmatch)) {
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$this->cnmatch = parse_url($url, PHP_URL_HOST);
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}
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$params = http_build_query($params, '', '&');
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switch($method) {
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case 'GET':
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$opts = array(
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'http' => array(
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'method' => 'GET',
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'header' => 'Accept: application/xrds+xml, */*',
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'user_agent' => $this->user_agent,
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'ignore_errors' => true,
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),
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'ssl' => array(
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'CN_match' => $this->cnmatch
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)
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);
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$url = $url . ($params ? '?' . $params : '');
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if (!empty($this->proxy)) {
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$opts['http']['proxy'] = $this->proxy_url();
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}
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break;
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case 'POST':
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$opts = array(
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'http' => array(
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'method' => 'POST',
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'header' => 'Content-type: application/x-www-form-urlencoded',
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'user_agent' => $this->user_agent,
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'content' => $params,
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'ignore_errors' => true,
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),
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'ssl' => array(
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'CN_match' => $this->cnmatch
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)
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);
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if (!empty($this->proxy)) {
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$opts['http']['proxy'] = $this->proxy_url();
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}
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break;
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case 'HEAD':
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// We want to send a HEAD request, but since get_headers() doesn't
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// accept $context parameter, we have to change the defaults.
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$default = stream_context_get_options(stream_context_get_default());
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// PHP does not reset all options. Instead, it just sets the options
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// available in the passed array, therefore set the defaults manually.
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$default += array(
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'http' => array(),
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'ssl' => array()
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);
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$default['http'] += array(
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'method' => 'GET',
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'header' => '',
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'user_agent' => '',
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'ignore_errors' => false
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);
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$default['ssl'] += array(
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'CN_match' => ''
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);
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$opts = array(
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'http' => array(
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'method' => 'HEAD',
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'header' => 'Accept: application/xrds+xml, */*',
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'user_agent' => $this->user_agent,
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'ignore_errors' => true,
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),
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'ssl' => array(
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'CN_match' => $this->cnmatch
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)
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);
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// Enable validation of the SSL certificates.
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if ($this->verify_peer) {
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$default['ssl'] += array(
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'verify_peer' => false,
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'capath' => '',
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'cafile' => ''
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);
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$opts['ssl'] += array(
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'verify_peer' => true,
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'capath' => $this->capath,
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'cafile' => $this->cainfo
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);
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}
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// Change the stream context options.
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stream_context_get_default($opts);
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$headers = get_headers($url . ($params ? '?' . $params : ''));
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// Restore the stream context options.
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stream_context_get_default($default);
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if (!empty($headers)) {
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if (intval(substr($headers[0], strlen('HTTP/1.1 '))) == 405) {
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// The server doesn't support HEAD - emulate it with a GET.
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$args = func_get_args();
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$args[1] = 'GET';
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call_user_func_array(array($this, 'request_streams'), $args);
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$headers = $this->headers;
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} else {
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$headers = $this->parse_header_array($headers, $update_claimed_id);
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}
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} else {
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$headers = array();
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}
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return $headers;
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}
|
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|
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if ($this->verify_peer) {
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$opts['ssl'] += array(
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'verify_peer' => true,
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'capath' => $this->capath,
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'cafile' => $this->cainfo
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);
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}
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$context = stream_context_create ($opts);
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$data = file_get_contents($url, false, $context);
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# This is a hack for providers who don't support HEAD requests.
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# It just creates the headers array for the last request in $this->headers.
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if(isset($http_response_header)) {
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$this->headers = $this->parse_header_array($http_response_header, $update_claimed_id);
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}
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return $data;
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}
|
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|
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protected function request($url, $method='GET', $params=array(), $update_claimed_id=false)
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{
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$use_curl = false;
|
|
|
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if (function_exists('curl_init')) {
|
|
if (!$use_curl) {
|
|
# When allow_url_fopen is disabled, PHP streams will not work.
|
|
$use_curl = !ini_get('allow_url_fopen');
|
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}
|
|
|
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if (!$use_curl) {
|
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# When there is no HTTPS wrapper, PHP streams cannott be used.
|
|
$use_curl = !in_array('https', stream_get_wrappers());
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}
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|
|
|
if (!$use_curl) {
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# With open_basedir or safe_mode set, cURL can't follow redirects.
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$use_curl = !(ini_get('safe_mode') || ini_get('open_basedir'));
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}
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}
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return
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$use_curl
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? $this->request_curl($url, $method, $params, $update_claimed_id)
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: $this->request_streams($url, $method, $params, $update_claimed_id);
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}
|
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|
|
protected function proxy_url()
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{
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$result = '';
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|
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if (!empty($this->proxy)) {
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$result = $this->proxy['host'];
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|
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if (!empty($this->proxy['port'])) {
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$result = $result . ':' . $this->proxy['port'];
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}
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|
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if (!empty($this->proxy['user'])) {
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$result = $this->proxy['user'] . ':' . $this->proxy['pass'] . '@' . $result;
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}
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$result = 'http://' . $result;
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}
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return $result;
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}
|
|
|
|
protected function build_url($url, $parts)
|
|
{
|
|
if (isset($url['query'], $parts['query'])) {
|
|
$parts['query'] = $url['query'] . '&' . $parts['query'];
|
|
}
|
|
|
|
$url = $parts + $url;
|
|
$url = $url['scheme'] . '://'
|
|
. (empty($url['username'])?''
|
|
:(empty($url['password'])? "{$url['username']}@"
|
|
:"{$url['username']}:{$url['password']}@"))
|
|
. $url['host']
|
|
. (empty($url['port'])?'':":{$url['port']}")
|
|
. (empty($url['path'])?'':$url['path'])
|
|
. (empty($url['query'])?'':"?{$url['query']}")
|
|
. (empty($url['fragment'])?'':"#{$url['fragment']}");
|
|
return $url;
|
|
}
|
|
|
|
/**
|
|
* Helper function used to scan for <meta>/<link> tags and extract information
|
|
* from them
|
|
*/
|
|
protected function htmlTag($content, $tag, $attrName, $attrValue, $valueName)
|
|
{
|
|
preg_match_all("#<{$tag}[^>]*$attrName=['\"].*?$attrValue.*?['\"][^>]*$valueName=['\"](.+?)['\"][^>]*/?>#i", $content, $matches1);
|
|
preg_match_all("#<{$tag}[^>]*$valueName=['\"](.+?)['\"][^>]*$attrName=['\"].*?$attrValue.*?['\"][^>]*/?>#i", $content, $matches2);
|
|
|
|
$result = array_merge($matches1[1], $matches2[1]);
|
|
return empty($result)?false:$result[0];
|
|
}
|
|
|
|
/**
|
|
* Performs Yadis and HTML discovery. Normally not used.
|
|
* @param $url Identity URL.
|
|
* @return String OP Endpoint (i.e. OpenID provider address).
|
|
* @throws ErrorException
|
|
*/
|
|
function discover($url)
|
|
{
|
|
if (!$url) throw new ErrorException('No identity supplied.');
|
|
# Use xri.net proxy to resolve i-name identities
|
|
if (!preg_match('#^https?:#', $url)) {
|
|
$url = "https://xri.net/$url";
|
|
}
|
|
|
|
# We save the original url in case of Yadis discovery failure.
|
|
# It can happen when we'll be lead to an XRDS document
|
|
# which does not have any OpenID2 services.
|
|
$originalUrl = $url;
|
|
|
|
# A flag to disable yadis discovery in case of failure in headers.
|
|
$yadis = true;
|
|
|
|
# Allows optional regex replacement of the URL, e.g. to use Google Apps
|
|
# as an OpenID provider without setting up XRDS on the domain hosting.
|
|
if (!is_null($this->xrds_override_pattern) && !is_null($this->xrds_override_replacement)) {
|
|
$url = preg_replace($this->xrds_override_pattern, $this->xrds_override_replacement, $url);
|
|
}
|
|
|
|
# We'll jump a maximum of 5 times, to avoid endless redirections.
|
|
for ($i = 0; $i < 5; $i ++) {
|
|
if ($yadis) {
|
|
$headers = $this->request($url, 'HEAD', array(), true);
|
|
|
|
$next = false;
|
|
if (isset($headers['x-xrds-location'])) {
|
|
$url = $this->build_url(parse_url($url), parse_url(trim($headers['x-xrds-location'])));
|
|
$next = true;
|
|
}
|
|
|
|
if (isset($headers['content-type']) && $this->is_allowed_type($headers['content-type'])) {
|
|
# Found an XRDS document, now let's find the server, and optionally delegate.
|
|
$content = $this->request($url, 'GET');
|
|
|
|
preg_match_all('#<Service.*?>(.*?)</Service>#s', $content, $m);
|
|
foreach($m[1] as $content) {
|
|
$content = ' ' . $content; # The space is added, so that strpos doesn't return 0.
|
|
|
|
# OpenID 2
|
|
$ns = preg_quote('http://specs.openid.net/auth/2.0/', '#');
|
|
if(preg_match('#<Type>\s*'.$ns.'(server|signon)\s*</Type>#s', $content, $type)) {
|
|
if ($type[1] == 'server') $this->identifier_select = true;
|
|
|
|
preg_match('#<URI.*?>(.*)</URI>#', $content, $server);
|
|
preg_match('#<(Local|Canonical)ID>(.*)</\1ID>#', $content, $delegate);
|
|
if (empty($server)) {
|
|
return false;
|
|
}
|
|
# Does the server advertise support for either AX or SREG?
|
|
$this->ax = (bool) strpos($content, '<Type>http://openid.net/srv/ax/1.0</Type>');
|
|
$this->sreg = strpos($content, '<Type>http://openid.net/sreg/1.0</Type>')
|
|
|| strpos($content, '<Type>http://openid.net/extensions/sreg/1.1</Type>');
|
|
|
|
$server = $server[1];
|
|
if (isset($delegate[2])) $this->identity = trim($delegate[2]);
|
|
$this->version = 2;
|
|
|
|
$this->server = $server;
|
|
return $server;
|
|
}
|
|
|
|
# OpenID 1.1
|
|
$ns = preg_quote('http://openid.net/signon/1.1', '#');
|
|
if (preg_match('#<Type>\s*'.$ns.'\s*</Type>#s', $content)) {
|
|
|
|
preg_match('#<URI.*?>(.*)</URI>#', $content, $server);
|
|
preg_match('#<.*?Delegate>(.*)</.*?Delegate>#', $content, $delegate);
|
|
if (empty($server)) {
|
|
return false;
|
|
}
|
|
# AX can be used only with OpenID 2.0, so checking only SREG
|
|
$this->sreg = strpos($content, '<Type>http://openid.net/sreg/1.0</Type>')
|
|
|| strpos($content, '<Type>http://openid.net/extensions/sreg/1.1</Type>');
|
|
|
|
$server = $server[1];
|
|
if (isset($delegate[1])) $this->identity = $delegate[1];
|
|
$this->version = 1;
|
|
|
|
$this->server = $server;
|
|
return $server;
|
|
}
|
|
}
|
|
|
|
$next = true;
|
|
$yadis = false;
|
|
$url = $originalUrl;
|
|
$content = null;
|
|
break;
|
|
}
|
|
if ($next) continue;
|
|
|
|
# There are no relevant information in headers, so we search the body.
|
|
$content = $this->request($url, 'GET', array(), true);
|
|
|
|
if (isset($this->headers['x-xrds-location'])) {
|
|
$url = $this->build_url(parse_url($url), parse_url(trim($this->headers['x-xrds-location'])));
|
|
continue;
|
|
}
|
|
|
|
$location = $this->htmlTag($content, 'meta', 'http-equiv', 'X-XRDS-Location', 'content');
|
|
if ($location) {
|
|
$url = $this->build_url(parse_url($url), parse_url($location));
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (!$content) $content = $this->request($url, 'GET');
|
|
|
|
# At this point, the YADIS Discovery has failed, so we'll switch
|
|
# to openid2 HTML discovery, then fallback to openid 1.1 discovery.
|
|
$server = $this->htmlTag($content, 'link', 'rel', 'openid2.provider', 'href');
|
|
$delegate = $this->htmlTag($content, 'link', 'rel', 'openid2.local_id', 'href');
|
|
$this->version = 2;
|
|
|
|
if (!$server) {
|
|
# The same with openid 1.1
|
|
$server = $this->htmlTag($content, 'link', 'rel', 'openid.server', 'href');
|
|
$delegate = $this->htmlTag($content, 'link', 'rel', 'openid.delegate', 'href');
|
|
$this->version = 1;
|
|
}
|
|
|
|
if ($server) {
|
|
# We found an OpenID2 OP Endpoint
|
|
if ($delegate) {
|
|
# We have also found an OP-Local ID.
|
|
$this->identity = $delegate;
|
|
}
|
|
$this->server = $server;
|
|
return $server;
|
|
}
|
|
|
|
throw new ErrorException("No OpenID Server found at $url", 404);
|
|
}
|
|
throw new ErrorException('Endless redirection!', 500);
|
|
}
|
|
|
|
protected function is_allowed_type($content_type) {
|
|
# Apparently, some providers return XRDS documents as text/html.
|
|
# While it is against the spec, allowing this here shouldn't break
|
|
# compatibility with anything.
|
|
$allowed_types = array('application/xrds+xml', 'text/html', 'text/xml');
|
|
|
|
foreach ($allowed_types as $type) {
|
|
if (strpos($content_type, $type) !== false) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
protected function sregParams()
|
|
{
|
|
$params = array();
|
|
# We always use SREG 1.1, even if the server is advertising only support for 1.0.
|
|
# That's because it's fully backwards compatibile with 1.0, and some providers
|
|
# advertise 1.0 even if they accept only 1.1. One such provider is myopenid.com
|
|
$params['openid.ns.sreg'] = 'http://openid.net/extensions/sreg/1.1';
|
|
if ($this->required) {
|
|
$params['openid.sreg.required'] = array();
|
|
foreach ($this->required as $required) {
|
|
if (!isset(self::$ax_to_sreg[$required])) continue;
|
|
$params['openid.sreg.required'][] = self::$ax_to_sreg[$required];
|
|
}
|
|
$params['openid.sreg.required'] = implode(',', $params['openid.sreg.required']);
|
|
}
|
|
|
|
if ($this->optional) {
|
|
$params['openid.sreg.optional'] = array();
|
|
foreach ($this->optional as $optional) {
|
|
if (!isset(self::$ax_to_sreg[$optional])) continue;
|
|
$params['openid.sreg.optional'][] = self::$ax_to_sreg[$optional];
|
|
}
|
|
$params['openid.sreg.optional'] = implode(',', $params['openid.sreg.optional']);
|
|
}
|
|
return $params;
|
|
}
|
|
|
|
protected function axParams()
|
|
{
|
|
$params = array();
|
|
if ($this->required || $this->optional) {
|
|
$params['openid.ns.ax'] = 'http://openid.net/srv/ax/1.0';
|
|
$params['openid.ax.mode'] = 'fetch_request';
|
|
$this->aliases = array();
|
|
$counts = array();
|
|
$required = array();
|
|
$optional = array();
|
|
foreach (array('required','optional') as $type) {
|
|
foreach ($this->$type as $alias => $field) {
|
|
if (is_int($alias)) $alias = strtr($field, '/', '_');
|
|
$this->aliases[$alias] = 'http://axschema.org/' . $field;
|
|
if (empty($counts[$alias])) $counts[$alias] = 0;
|
|
$counts[$alias] += 1;
|
|
${$type}[] = $alias;
|
|
}
|
|
}
|
|
foreach ($this->aliases as $alias => $ns) {
|
|
$params['openid.ax.type.' . $alias] = $ns;
|
|
}
|
|
foreach ($counts as $alias => $count) {
|
|
if ($count == 1) continue;
|
|
$params['openid.ax.count.' . $alias] = $count;
|
|
}
|
|
|
|
# Don't send empty ax.requied and ax.if_available.
|
|
# Google and possibly other providers refuse to support ax when one of these is empty.
|
|
if($required) {
|
|
$params['openid.ax.required'] = implode(',', $required);
|
|
}
|
|
if($optional) {
|
|
$params['openid.ax.if_available'] = implode(',', $optional);
|
|
}
|
|
}
|
|
return $params;
|
|
}
|
|
|
|
protected function authUrl_v1($immediate)
|
|
{
|
|
$returnUrl = $this->returnUrl;
|
|
# If we have an openid.delegate that is different from our claimed id,
|
|
# we need to somehow preserve the claimed id between requests.
|
|
# The simplest way is to just send it along with the return_to url.
|
|
if($this->identity != $this->claimed_id) {
|
|
$returnUrl .= (strpos($returnUrl, '?') ? '&' : '?') . 'openid.claimed_id=' . $this->claimed_id;
|
|
}
|
|
|
|
$params = array(
|
|
'openid.return_to' => $returnUrl,
|
|
'openid.mode' => $immediate ? 'checkid_immediate' : 'checkid_setup',
|
|
'openid.identity' => $this->identity,
|
|
'openid.trust_root' => $this->trustRoot,
|
|
) + $this->sregParams();
|
|
|
|
return $this->build_url(parse_url($this->server)
|
|
, array('query' => http_build_query($params, '', '&')));
|
|
}
|
|
|
|
protected function authUrl_v2($immediate)
|
|
{
|
|
$params = array(
|
|
'openid.ns' => 'http://specs.openid.net/auth/2.0',
|
|
'openid.mode' => $immediate ? 'checkid_immediate' : 'checkid_setup',
|
|
'openid.return_to' => $this->returnUrl,
|
|
'openid.realm' => $this->trustRoot,
|
|
);
|
|
|
|
if ($this->ax) {
|
|
$params += $this->axParams();
|
|
}
|
|
|
|
if ($this->sreg) {
|
|
$params += $this->sregParams();
|
|
}
|
|
|
|
if (!$this->ax && !$this->sreg) {
|
|
# If OP doesn't advertise either SREG, nor AX, let's send them both
|
|
# in worst case we don't get anything in return.
|
|
$params += $this->axParams() + $this->sregParams();
|
|
}
|
|
|
|
if (!empty($this->oauth) && is_array($this->oauth)) {
|
|
$params['openid.ns.oauth'] = 'http://specs.openid.net/extensions/oauth/1.0';
|
|
$params['openid.oauth.consumer'] = str_replace(array('http://', 'https://'), '', $this->trustRoot);
|
|
$params['openid.oauth.scope'] = implode(' ', $this->oauth);
|
|
}
|
|
|
|
if ($this->identifier_select) {
|
|
$params['openid.identity'] = $params['openid.claimed_id']
|
|
= 'http://specs.openid.net/auth/2.0/identifier_select';
|
|
} else {
|
|
$params['openid.identity'] = $this->identity;
|
|
$params['openid.claimed_id'] = $this->claimed_id;
|
|
}
|
|
|
|
return $this->build_url(parse_url($this->server)
|
|
, array('query' => http_build_query($params, '', '&')));
|
|
}
|
|
|
|
/**
|
|
* Returns authentication url. Usually, you want to redirect your user to it.
|
|
* @return String The authentication url.
|
|
* @param String $select_identifier Whether to request OP to select identity for an user in OpenID 2. Does not affect OpenID 1.
|
|
* @throws ErrorException
|
|
*/
|
|
function authUrl($immediate = false)
|
|
{
|
|
if ($this->setup_url && !$immediate) return $this->setup_url;
|
|
if (!$this->server) $this->discover($this->identity);
|
|
|
|
if ($this->version == 2) {
|
|
return $this->authUrl_v2($immediate);
|
|
}
|
|
return $this->authUrl_v1($immediate);
|
|
}
|
|
|
|
/**
|
|
* Performs OpenID verification with the OP.
|
|
* @return Bool Whether the verification was successful.
|
|
* @throws ErrorException
|
|
*/
|
|
function validate()
|
|
{
|
|
# If the request was using immediate mode, a failure may be reported
|
|
# by presenting user_setup_url (for 1.1) or reporting
|
|
# mode 'setup_needed' (for 2.0). Also catching all modes other than
|
|
# id_res, in order to avoid throwing errors.
|
|
if(isset($this->data['openid_user_setup_url'])) {
|
|
$this->setup_url = $this->data['openid_user_setup_url'];
|
|
return false;
|
|
}
|
|
if($this->mode != 'id_res') {
|
|
return false;
|
|
}
|
|
|
|
$this->claimed_id = isset($this->data['openid_claimed_id'])?$this->data['openid_claimed_id']:$this->data['openid_identity'];
|
|
$params = array(
|
|
'openid.assoc_handle' => $this->data['openid_assoc_handle'],
|
|
'openid.signed' => $this->data['openid_signed'],
|
|
'openid.sig' => $this->data['openid_sig'],
|
|
);
|
|
|
|
if (isset($this->data['openid_ns'])) {
|
|
# We're dealing with an OpenID 2.0 server, so let's set an ns
|
|
# Even though we should know location of the endpoint,
|
|
# we still need to verify it by discovery, so $server is not set here
|
|
$params['openid.ns'] = 'http://specs.openid.net/auth/2.0';
|
|
} elseif (isset($this->data['openid_claimed_id'])
|
|
&& $this->data['openid_claimed_id'] != $this->data['openid_identity']
|
|
) {
|
|
# If it's an OpenID 1 provider, and we've got claimed_id,
|
|
# we have to append it to the returnUrl, like authUrl_v1 does.
|
|
$this->returnUrl .= (strpos($this->returnUrl, '?') ? '&' : '?')
|
|
. 'openid.claimed_id=' . $this->claimed_id;
|
|
}
|
|
|
|
if ($this->data['openid_return_to'] != $this->returnUrl) {
|
|
# The return_to url must match the url of current request.
|
|
# I'm assuing that noone will set the returnUrl to something that doesn't make sense.
|
|
return false;
|
|
}
|
|
|
|
$server = $this->discover($this->claimed_id);
|
|
|
|
foreach (explode(',', $this->data['openid_signed']) as $item) {
|
|
# Checking whether magic_quotes_gpc is turned on, because
|
|
# the function may fail if it is. For example, when fetching
|
|
# AX namePerson, it might containg an apostrophe, which will be escaped.
|
|
# In such case, validation would fail, since we'd send different data than OP
|
|
# wants to verify. stripslashes() should solve that problem, but we can't
|
|
# use it when magic_quotes is off.
|
|
$value = $this->data['openid_' . str_replace('.','_',$item)];
|
|
$params['openid.' . $item] = function_exists('get_magic_quotes_gpc') && get_magic_quotes_gpc() ? stripslashes($value) : $value;
|
|
|
|
}
|
|
|
|
$params['openid.mode'] = 'check_authentication';
|
|
|
|
$response = $this->request($server, 'POST', $params);
|
|
|
|
return preg_match('/is_valid\s*:\s*true/i', $response);
|
|
}
|
|
|
|
protected function getAxAttributes()
|
|
{
|
|
$result = array();
|
|
|
|
if ($alias = $this->getNamespaceAlias('http://openid.net/srv/ax/1.0', 'ax')) {
|
|
$prefix = 'openid_' . $alias;
|
|
$length = strlen('http://axschema.org/');
|
|
|
|
foreach (explode(',', $this->data['openid_signed']) as $key) {
|
|
$keyMatch = $alias . '.type.';
|
|
|
|
if (strncmp($key, $keyMatch, strlen($keyMatch)) !== 0) {
|
|
continue;
|
|
}
|
|
|
|
$key = substr($key, strlen($keyMatch));
|
|
$idv = $prefix . '_value_' . $key;
|
|
$idc = $prefix . '_count_' . $key;
|
|
$key = substr($this->getItem($prefix . '_type_' . $key), $length);
|
|
|
|
if (!empty($key)) {
|
|
if (($count = intval($this->getItem($idc))) > 0) {
|
|
$value = array();
|
|
|
|
for ($i = 1; $i <= $count; $i++) {
|
|
$value[] = $this->getItem($idv . '_' . $i);
|
|
}
|
|
|
|
$value = ($count == 1) ? reset($value) : $value;
|
|
} else {
|
|
$value = $this->getItem($idv);
|
|
}
|
|
|
|
if (!is_null($value)) {
|
|
$result[$key] = $value;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// No alias for the AX schema has been found,
|
|
// so there is no AX data in the OP's response.
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
protected function getSregAttributes()
|
|
{
|
|
$attributes = array();
|
|
$sreg_to_ax = array_flip(self::$ax_to_sreg);
|
|
foreach (explode(',', $this->data['openid_signed']) as $key) {
|
|
$keyMatch = 'sreg.';
|
|
if (strncmp($key, $keyMatch, strlen($keyMatch)) !== 0) {
|
|
continue;
|
|
}
|
|
$key = substr($key, strlen($keyMatch));
|
|
if (!isset($sreg_to_ax[$key])) {
|
|
# The field name isn't part of the SREG spec, so we ignore it.
|
|
continue;
|
|
}
|
|
$attributes[$sreg_to_ax[$key]] = $this->data['openid_sreg_' . $key];
|
|
}
|
|
return $attributes;
|
|
}
|
|
|
|
/**
|
|
* Gets AX/SREG attributes provided by OP. should be used only after successful validaton.
|
|
* Note that it does not guarantee that any of the required/optional parameters will be present,
|
|
* or that there will be no other attributes besides those specified.
|
|
* In other words. OP may provide whatever information it wants to.
|
|
* * SREG names will be mapped to AX names.
|
|
* * @return Array Array of attributes with keys being the AX schema names, e.g. 'contact/email'
|
|
* @see http://www.axschema.org/types/
|
|
*/
|
|
function getAttributes()
|
|
{
|
|
if (isset($this->data['openid_ns'])
|
|
&& $this->data['openid_ns'] == 'http://specs.openid.net/auth/2.0'
|
|
) { # OpenID 2.0
|
|
# We search for both AX and SREG attributes, with AX taking precedence.
|
|
return $this->getAxAttributes() + $this->getSregAttributes();
|
|
}
|
|
return $this->getSregAttributes();
|
|
}
|
|
|
|
/**
|
|
* Gets an OAuth request token if the OpenID+OAuth hybrid protocol has been used.
|
|
*
|
|
* In order to use the OpenID+OAuth hybrid protocol, you need to add at least one
|
|
* scope to the $openid->oauth array before you get the call to getAuthUrl(), e.g.:
|
|
* $openid->oauth[] = 'https://www.googleapis.com/auth/plus.me';
|
|
*
|
|
* Furthermore the registered consumer name must fit the OpenID realm.
|
|
* To register an OpenID consumer at Google use: https://www.google.com/accounts/ManageDomains
|
|
*
|
|
* @return string|bool OAuth request token on success, FALSE if no token was provided.
|
|
*/
|
|
function getOAuthRequestToken()
|
|
{
|
|
$alias = $this->getNamespaceAlias('http://specs.openid.net/extensions/oauth/1.0');
|
|
|
|
return !empty($alias) ? $this->data['openid_' . $alias . '_request_token'] : false;
|
|
}
|
|
|
|
/**
|
|
* Gets the alias for the specified namespace, if it's present.
|
|
*
|
|
* @param string $namespace The namespace for which an alias is needed.
|
|
* @param string $hint Common alias of this namespace, used for optimization.
|
|
* @return string|null The namespace alias if found, otherwise - NULL.
|
|
*/
|
|
private function getNamespaceAlias($namespace, $hint = null)
|
|
{
|
|
$result = null;
|
|
|
|
if (empty($hint) || $this->getItem('openid_ns_' . $hint) != $namespace) {
|
|
// The common alias is either undefined or points to
|
|
// some other extension - search for another alias..
|
|
$prefix = 'openid_ns_';
|
|
$length = strlen($prefix);
|
|
|
|
foreach ($this->data as $key => $val) {
|
|
if (strncmp($key, $prefix, $length) === 0 && $val === $namespace) {
|
|
$result = trim(substr($key, $length));
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
$result = $hint;
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Gets an item from the $data array by the specified id.
|
|
*
|
|
* @param string $id The id of the desired item.
|
|
* @return string|null The item if found, otherwise - NULL.
|
|
*/
|
|
private function getItem($id)
|
|
{
|
|
return isset($this->data[$id]) ? $this->data[$id] : null;
|
|
}
|
|
}
|