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update LightOpenID v1.1.1

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commit bea75d4ac4c5f325bf2bc9e96236daf792a40002 1 parent d8cca61
hybridauth authored
Showing with 981 additions and 834 deletions.
  1. +981 −834 hybridauth/Hybrid/thirdparty/OpenID/LightOpenID.php
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1,815 hybridauth/Hybrid/thirdparty/OpenID/LightOpenID.php
@@ -1,834 +1,981 @@
-<?php
-// http://gitorious.org/lightopenid
-// updated 29/12/2012
-
-/**
- * This class provides a simple interface for OpenID (1.1 and 2.0) authentication.
- * Supports Yadis discovery.
- * The authentication process is stateless/dumb.
- *
- * Usage:
- * Sign-on with OpenID is a two step process:
- * Step one is authentication with the provider:
- * <code>
- * $openid = new LightOpenID('my-host.example.org');
- * $openid->identity = 'ID supplied by user';
- * header('Location: ' . $openid->authUrl());
- * </code>
- * The provider then sends various parameters via GET, one of them is openid_mode.
- * Step two is verification:
- * <code>
- * $openid = new LightOpenID('my-host.example.org');
- * if ($openid->mode) {
- * echo $openid->validate() ? 'Logged in.' : 'Failed';
- * }
- * </code>
- *
- * Change the 'my-host.example.org' to your domain name. Do NOT use $_SERVER['HTTP_HOST']
- * for that, unless you know what you are doing.
- *
- * Optionally, you can set $returnUrl and $realm (or $trustRoot, which is an alias).
- * The default values for those are:
- * $openid->realm = (!empty($_SERVER['HTTPS']) ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'];
- * $openid->returnUrl = $openid->realm . $_SERVER['REQUEST_URI'];
- * If you don't know their meaning, refer to any openid tutorial, or specification. Or just guess.
- *
- * AX and SREG extensions are supported.
- * To use them, specify $openid->required and/or $openid->optional before calling $openid->authUrl().
- * These are arrays, with values being AX schema paths (the 'path' part of the URL).
- * For example:
- * $openid->required = array('namePerson/friendly', 'contact/email');
- * $openid->optional = array('namePerson/first');
- * If the server supports only SREG or OpenID 1.1, these are automaticaly
- * mapped to SREG names, so that user doesn't have to know anything about the server.
- *
- * To get the values, use $openid->getAttributes().
- *
- *
- * The library requires PHP >= 5.1.2 with curl or http/https stream wrappers enabled.
- * @author Mewp
- * @copyright Copyright (c) 2010, Mewp
- * @license http://www.opensource.org/licenses/mit-license.php MIT
- */
-class LightOpenID
-{
- public $returnUrl
- , $required = array()
- , $optional = array()
- , $verify_peer = null
- , $capath = null
- , $cainfo = null
- , $data;
- private $identity, $claimed_id;
- protected $server, $version, $trustRoot, $aliases, $identifier_select = false
- , $ax = false, $sreg = false, $setup_url = null, $headers = array();
- static protected $ax_to_sreg = array(
- 'namePerson/friendly' => 'nickname',
- 'contact/email' => 'email',
- 'namePerson' => 'fullname',
- 'birthDate' => 'dob',
- 'person/gender' => 'gender',
- 'contact/postalCode/home' => 'postcode',
- 'contact/country/home' => 'country',
- 'pref/language' => 'language',
- 'pref/timezone' => 'timezone',
- );
-
- function __construct($host)
- {
- $this->trustRoot = (strpos($host, '://') ? $host : 'http://' . $host);
- if ((!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off')
- || (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])
- && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https')
- ) {
- $this->trustRoot = (strpos($host, '://') ? $host : 'https://' . $host);
- }
-
- if(($host_end = strpos($this->trustRoot, '/', 8)) !== false) {
- $this->trustRoot = substr($this->trustRoot, 0, $host_end);
- }
-
- $uri = rtrim(preg_replace('#((?<=\?)|&)openid\.[^&]+#', '', $_SERVER['REQUEST_URI']), '?');
- $this->returnUrl = $this->trustRoot . $uri;
-
- $this->data = ($_SERVER['REQUEST_METHOD'] === 'POST') ? $_POST : $_GET;
-
- if(!function_exists('curl_init') && !in_array('https', stream_get_wrappers())) {
- throw new ErrorException('You must have either https wrappers or curl enabled.');
- }
- }
-
- function __set($name, $value)
- {
- switch ($name) {
- case 'identity':
- if (strlen($value = trim((String) $value))) {
- if (preg_match('#^xri:/*#i', $value, $m)) {
- $value = substr($value, strlen($m[0]));
- } elseif (!preg_match('/^(?:[=@+\$!\(]|https?:)/i', $value)) {
- $value = "http://$value";
- }
- if (preg_match('#^https?://[^/]+$#i', $value, $m)) {
- $value .= '/';
- }
- }
- $this->$name = $this->claimed_id = $value;
- break;
- case 'trustRoot':
- case 'realm':
- $this->trustRoot = trim($value);
- }
- }
-
- function __get($name)
- {
- switch ($name) {
- case 'identity':
- # We return claimed_id instead of identity,
- # because the developer should see the claimed identifier,
- # i.e. what he set as identity, not the op-local identifier (which is what we verify)
- return $this->claimed_id;
- case 'trustRoot':
- case 'realm':
- return $this->trustRoot;
- case 'mode':
- return empty($this->data['openid_mode']) ? null : $this->data['openid_mode'];
- }
- }
-
- /**
- * Checks if the server specified in the url exists.
- *
- * @param $url url to check
- * @return true, if the server exists; false otherwise
- */
- function hostExists($url)
- {
- if (strpos($url, '/') === false) {
- $server = $url;
- } else {
- $server = @parse_url($url, PHP_URL_HOST);
- }
-
- if (!$server) {
- return false;
- }
-
- return !!gethostbynamel($server);
- }
-
- protected function request_curl($url, $method='GET', $params=array(), $update_claimed_id)
- {
- $params = http_build_query($params, '', '&');
- $curl = curl_init($url . ($method == 'GET' && $params ? '?' . $params : ''));
- curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
- curl_setopt($curl, CURLOPT_HEADER, false);
- curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
- curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
- curl_setopt($curl, CURLOPT_HTTPHEADER, array('Accept: application/xrds+xml, */*'));
-
- if($this->verify_peer !== null) {
- curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, $this->verify_peer);
- if($this->capath) {
- curl_setopt($curl, CURLOPT_CAPATH, $this->capath);
- }
-
- if($this->cainfo) {
- curl_setopt($curl, CURLOPT_CAINFO, $this->cainfo);
- }
- }
-
- if ($method == 'POST') {
- curl_setopt($curl, CURLOPT_POST, true);
- curl_setopt($curl, CURLOPT_POSTFIELDS, $params);
- } elseif ($method == 'HEAD') {
- curl_setopt($curl, CURLOPT_HEADER, true);
- curl_setopt($curl, CURLOPT_NOBODY, true);
- } else {
- curl_setopt($curl, CURLOPT_HEADER, true);
- curl_setopt($curl, CURLOPT_HTTPGET, true);
- }
- $response = curl_exec($curl);
-
- if($method == 'HEAD' && curl_getinfo($curl, CURLINFO_HTTP_CODE) == 405) {
- curl_setopt($curl, CURLOPT_HTTPGET, true);
- $response = curl_exec($curl);
- $response = substr($response, 0, strpos($response, "\r\n\r\n"));
- }
-
- if($method == 'HEAD' || $method == 'GET') {
- $header_response = $response;
-
- # If it's a GET request, we want to only parse the header part.
- if($method == 'GET') {
- $header_response = substr($response, 0, strpos($response, "\r\n\r\n"));
- }
-
- $headers = array();
- foreach(explode("\n", $header_response) as $header) {
- $pos = strpos($header,':');
- if ($pos !== false) {
- $name = strtolower(trim(substr($header, 0, $pos)));
- $headers[$name] = trim(substr($header, $pos+1));
- }
- }
-
- if($update_claimed_id) {
- # Updating claimed_id in case of redirections.
- $effective_url = curl_getinfo($curl, CURLINFO_EFFECTIVE_URL);
- if($effective_url != $url) {
- $this->identity = $this->claimed_id = $effective_url;
- }
- }
-
- if($method == 'HEAD') {
- return $headers;
- } else {
- $this->headers = $headers;
- }
- }
-
- if (curl_errno($curl)) {
- throw new ErrorException(curl_error($curl), curl_errno($curl));
- }
-
- return $response;
- }
-
- protected function parse_header_array($array, $update_claimed_id)
- {
- $headers = array();
- foreach($array as $header) {
- $pos = strpos($header,':');
- if ($pos !== false) {
- $name = strtolower(trim(substr($header, 0, $pos)));
- $headers[$name] = trim(substr($header, $pos+1));
-
- # Following possible redirections. The point is just to have
- # claimed_id change with them, because the redirections
- # are followed automatically.
- # We ignore redirections with relative paths.
- # If any known provider uses them, file a bug report.
- if($name == 'location' && $update_claimed_id) {
- if(strpos($headers[$name], 'http') === 0) {
- $this->identity = $this->claimed_id = $headers[$name];
- } elseif($headers[$name][0] == '/') {
- $parsed_url = parse_url($this->claimed_id);
- $this->identity =
- $this->claimed_id = $parsed_url['scheme'] . '://'
- . $parsed_url['host']
- . $headers[$name];
- }
- }
- }
- }
- return $headers;
- }
-
- protected function request_streams($url, $method='GET', $params=array(), $update_claimed_id)
- {
- if(!$this->hostExists($url)) {
- throw new ErrorException("Could not connect to $url.", 404);
- }
-
- $params = http_build_query($params, '', '&');
- switch($method) {
- case 'GET':
- $opts = array(
- 'http' => array(
- 'method' => 'GET',
- 'header' => 'Accept: application/xrds+xml, */*',
- 'ignore_errors' => true,
- ), 'ssl' => array(
- 'CN_match' => parse_url($url, PHP_URL_HOST),
- ),
- );
- $url = $url . ($params ? '?' . $params : '');
- break;
- case 'POST':
- $opts = array(
- 'http' => array(
- 'method' => 'POST',
- 'header' => 'Content-type: application/x-www-form-urlencoded',
- 'content' => $params,
- 'ignore_errors' => true,
- ), 'ssl' => array(
- 'CN_match' => parse_url($url, PHP_URL_HOST),
- ),
- );
- break;
- case 'HEAD':
- # We want to send a HEAD request,
- # but since get_headers doesn't accept $context parameter,
- # we have to change the defaults.
- $default = stream_context_get_options(stream_context_get_default());
- stream_context_get_default(
- array(
- 'http' => array(
- 'method' => 'HEAD',
- 'header' => 'Accept: application/xrds+xml, */*',
- 'ignore_errors' => true,
- ), 'ssl' => array(
- 'CN_match' => parse_url($url, PHP_URL_HOST),
- ),
- )
- );
-
- $url = $url . ($params ? '?' . $params : '');
- $headers = get_headers ($url);
- if(!$headers) {
- return array();
- }
-
- if(intval(substr($headers[0], strlen('HTTP/1.1 '))) == 405) {
- # The server doesn't support HEAD, so let's emulate it with
- # a GET.
- $args = func_get_args();
- $args[1] = 'GET';
- call_user_func_array(array($this, 'request_streams'), $args);
- return $this->headers;
- }
-
- $headers = $this->parse_header_array($headers, $update_claimed_id);
-
- # And restore them.
- stream_context_get_default($default);
- return $headers;
- }
-
- if($this->verify_peer) {
- $opts['ssl'] += array(
- 'verify_peer' => true,
- 'capath' => $this->capath,
- 'cafile' => $this->cainfo,
- );
- }
-
- $context = stream_context_create ($opts);
- $data = file_get_contents($url, false, $context);
- # This is a hack for providers who don't support HEAD requests.
- # It just creates the headers array for the last request in $this->headers.
- if(isset($http_response_header)) {
- $this->headers = $this->parse_header_array($http_response_header, $update_claimed_id);
- }
-
- return $data;
- }
-
- protected function request($url, $method='GET', $params=array(), $update_claimed_id=false)
- {
- if (function_exists('curl_init')
- && (!in_array('https', stream_get_wrappers()) || !ini_get('safe_mode') && !ini_get('open_basedir'))
- ) {
- return $this->request_curl($url, $method, $params, $update_claimed_id);
- }
- return $this->request_streams($url, $method, $params, $update_claimed_id);
- }
-
- protected function build_url($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.
- $yadis = true;
-
- # We'll jump a maximum of 5 times, to avoid endless redirections.
- for ($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'])
- && (strpos($headers['content-type'], 'application/xrds+xml') !== false
- || strpos($headers['content-type'], 'text/xml') !== false)
- ) {
- # Apparently, some providers return XRDS documents as text/html.
- # While it is against the spec, allowing this here shouldn't break
- # compatibility with anything.
- # ---
- # 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 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() + $this->sregParams();
- }
-
- if ($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()
- {
- $alias = null;
- if (isset($this->data['openid_ns_ax'])
- && $this->data['openid_ns_ax'] != 'http://openid.net/srv/ax/1.0'
- ) { # It's the most likely case, so we'll check it before
- $alias = 'ax';
- } else {
- # 'ax' prefix is either undefined, or points to another extension,
- # so we search for another prefix
- foreach ($this->data as $key => $val) {
- if (substr($key, 0, strlen('openid_ns_')) == 'openid_ns_'
- && $val == 'http://openid.net/srv/ax/1.0'
- ) {
- $alias = substr($key, strlen('openid_ns_'));
- break;
- }
- }
- }
- if (!$alias) {
- # An alias for AX schema has not been found,
- # so there is no AX data in the OP's response
- return array();
- }
-
- $attributes = array();
- foreach (explode(',', $this->data['openid_signed']) as $key) {
- $keyMatch = $alias . '.value.';
- if (substr($key, 0, strlen($keyMatch)) != $keyMatch) {
- continue;
- }
- $key = substr($key, strlen($keyMatch));
- if (!isset($this->data['openid_' . $alias . '_type_' . $key])) {
- # OP is breaking the spec by returning a field without
- # associated ns. This shouldn't happen, but it's better
- # to check, than cause an E_NOTICE.
- continue;
- }
- $value = $this->data['openid_' . $alias . '_value_' . $key];
- $key = substr($this->data['openid_' . $alias . '_type_' . $key],
- strlen('http://axschema.org/'));
-
- $attributes[$key] = $value;
- }
- return $attributes;
- }
-
- protected function getSregAttributes()
- {
- $attributes = array();
- $sreg_to_ax = array_flip(self::$ax_to_sreg);
- foreach (explode(',', $this->data['openid_signed']) as $key) {
- $keyMatch = 'sreg.';
- if (substr($key, 0, strlen($keyMatch)) != $keyMatch) {
- 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();
- }
-}
+<?php
+// https://github.com/iignatov/LightOpenID
+
+/**
+ * This class provides a simple interface for OpenID 1.1/2.0 authentication.
+ *
+ * It requires PHP >= 5.1.2 with cURL or HTTP/HTTPS stream wrappers enabled.
+ *
+ * @version v1.1.1 2012-12-21
+ * @link http://gitorious.org/lightopenid Official Repo
+ * @link http://github.com/iignatov/LightOpenID GitHub Clone
+ * @author Mewp
+ * @copyright Copyright (c) 2010, Mewp
+ * @license http://www.opensource.org/licenses/mit-license.php MIT License
+ */
+class LightOpenID
+{
+ public $returnUrl
+ , $required = array()
+ , $optional = array()
+ , $verify_peer = null
+ , $capath = null
+ , $cainfo = null
+ , $data
+ , $oauth = array();
+ private $identity, $claimed_id;
+ protected $server, $version, $trustRoot, $aliases, $identifier_select = false
+ , $ax = false, $sreg = false, $setup_url = null, $headers = array(), $proxy = null
+ , $xrds_override_pattern = null, $xrds_override_replacement = null;
+ static protected $ax_to_sreg = array(
+ 'namePerson/friendly' => 'nickname',
+ 'contact/email' => 'email',
+ 'namePerson' => 'fullname',
+ 'birthDate' => 'dob',
+ 'person/gender' => 'gender',
+ 'contact/postalCode/home' => 'postcode',
+ 'contact/country/home' => 'country',
+ 'pref/language' => 'language',
+ 'pref/timezone' => 'timezone',
+ );
+
+ function __construct($host, $proxy = null)
+ {
+ $this->trustRoot = (strpos($host, '://') ? $host : 'http://' . $host);
+ if ((!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off')
+ || (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])
+ && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https')
+ ) {
+ $this->trustRoot = (strpos($host, '://') ? $host : 'https://' . $host);
+ }
+
+ if(($host_end = strpos($this->trustRoot, '/', 8)) !== false) {
+ $this->trustRoot = substr($this->trustRoot, 0, $host_end);
+ }
+
+ $this->set_proxy($proxy);
+
+ $uri = rtrim(preg_replace('#((?<=\?)|&)openid\.[^&]+#', '', $_SERVER['REQUEST_URI']), '?');
+ $this->returnUrl = $this->trustRoot . $uri;
+
+ $this->data = ($_SERVER['REQUEST_METHOD'] === 'POST') ? $_POST : $_GET;
+
+ if(!function_exists('curl_init') && !in_array('https', stream_get_wrappers())) {
+ throw new ErrorException('You must have either https wrappers or curl enabled.');
+ }
+ }
+
+ function __set($name, $value)
+ {
+ switch ($name) {
+ case 'identity':
+ if (strlen($value = trim((String) $value))) {
+ if (preg_match('#^xri:/*#i', $value, $m)) {
+ $value = substr($value, strlen($m[0]));
+ } elseif (!preg_match('/^(?:[=@+\$!\(]|https?:)/i', $value)) {
+ $value = "http://$value";
+ }
+ if (preg_match('#^https?://[^/]+$#i', $value, $m)) {
+ $value .= '/';
+ }
+ }
+ $this->$name = $this->claimed_id = $value;
+ break;
+ case 'trustRoot':
+ case 'realm':
+ $this->trustRoot = trim($value);
+ break;
+ case 'xrdsOverride':
+ if (is_array($value)) {
+ list($pattern, $replacement) = $value;
+ $this->xrds_override_pattern = $pattern;
+ $this->xrds_override_replacement = $replacement;
+ } else {
+ trigger_error('Invalid value specified for "xrdsOverride".', E_USER_ERROR);
+ }
+ break;
+ }
+ }
+
+ function __get($name)
+ {
+ switch ($name) {
+ case 'identity':
+ # We return claimed_id instead of identity,
+ # because the developer should see the claimed identifier,
+ # i.e. what he set as identity, not the op-local identifier (which is what we verify)
+ return $this->claimed_id;
+ case 'trustRoot':
+ case 'realm':
+ return $this->trustRoot;
+ case 'mode':
+ return empty($this->data['openid_mode']) ? null : $this->data['openid_mode'];
+ }
+ }
+
+ function set_proxy($proxy)
+ {
+ if (!empty($proxy)) {
+ // When the proxy is a string - try to parse it.
+ if (!is_array($proxy)) {
+ $proxy = parse_url($proxy);
+ }
+
+ // Check if $proxy is valid after the parsing.
+ if ($proxy && !empty($proxy['host'])) {
+ // Make sure that a valid port number is specified.
+ if (array_key_exists('port', $proxy)) {
+ if (!is_int($proxy['port'])) {
+ $proxy['port'] = is_numeric($proxy['port']) ? intval($proxy['port']) : 0;
+ }
+
+ if ($port <= 0) {
+ unset($proxy['port']);
+ }
+ }
+
+ $this->proxy = $proxy;
+ }
+ }
+ }
+
+ /**
+ * Checks if the server specified in the url exists.
+ *
+ * @param $url url to check
+ * @return true, if the server exists; false otherwise
+ */
+ function hostExists($url)
+ {
+ if (strpos($url, '/') === false) {
+ $server = $url;
+ } else {
+ $server = @parse_url($url, PHP_URL_HOST);
+ }
+
+ if (!$server) {
+ return false;
+ }
+
+ return !!gethostbynamel($server);
+ }
+
+ protected function request_curl($url, $method='GET', $params=array(), $update_claimed_id)
+ {
+ $params = http_build_query($params, '', '&');
+ $curl = curl_init($url . ($method == 'GET' && $params ? '?' . $params : ''));
+ curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
+ curl_setopt($curl, CURLOPT_HEADER, false);
+ curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
+ curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
+ curl_setopt($curl, CURLOPT_HTTPHEADER, array('Accept: application/xrds+xml, */*'));
+
+ if (!empty($this->proxy)) {
+ curl_setopt($curl, CURLOPT_PROXY, $this->proxy['host']);
+
+ if (!empty($this->proxy['port'])) {
+ curl_setopt($curl, CURLOPT_PROXYPORT, $this->proxy['port']);
+ }
+
+ if (!empty($this->proxy['user'])) {
+ curl_setopt($curl, CURLOPT_PROXYUSERPWD, $this->proxy['user'] . ':' . $this->proxy['pass']);
+ }
+ }
+
+ if($this->verify_peer !== null) {
+ curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, $this->verify_peer);
+ if($this->capath) {
+ curl_setopt($curl, CURLOPT_CAPATH, $this->capath);
+ }
+
+ if($this->cainfo) {
+ curl_setopt($curl, CURLOPT_CAINFO, $this->cainfo);
+ }
+ }
+
+ if ($method == 'POST') {
+ curl_setopt($curl, CURLOPT_POST, true);
+ curl_setopt($curl, CURLOPT_POSTFIELDS, $params);
+ } elseif ($method == 'HEAD') {
+ curl_setopt($curl, CURLOPT_HEADER, true);
+ curl_setopt($curl, CURLOPT_NOBODY, true);
+ } else {
+ curl_setopt($curl, CURLOPT_HEADER, true);
+ curl_setopt($curl, CURLOPT_HTTPGET, true);
+ }
+ $response = curl_exec($curl);
+
+ if($method == 'HEAD' && curl_getinfo($curl, CURLINFO_HTTP_CODE) == 405) {
+ curl_setopt($curl, CURLOPT_HTTPGET, true);
+ $response = curl_exec($curl);
+ $response = substr($response, 0, strpos($response, "\r\n\r\n"));
+ }
+
+ if($method == 'HEAD' || $method == 'GET') {
+ $header_response = $response;
+
+ # If it's a GET request, we want to only parse the header part.
+ if($method == 'GET') {
+ $header_response = substr($response, 0, strpos($response, "\r\n\r\n"));
+ }
+
+ $headers = array();
+ foreach(explode("\n", $header_response) as $header) {
+ $pos = strpos($header,':');
+ if ($pos !== false) {
+ $name = strtolower(trim(substr($header, 0, $pos)));
+ $headers[$name] = trim(substr($header, $pos+1));
+ }
+ }
+
+ if($update_claimed_id) {
+ # Updating claimed_id in case of redirections.
+ $effective_url = curl_getinfo($curl, CURLINFO_EFFECTIVE_URL);
+ if($effective_url != $url) {
+ $this->identity = $this->claimed_id = $effective_url;
+ }
+ }
+
+ if($method == 'HEAD') {
+ return $headers;
+ } else {
+ $this->headers = $headers;
+ }
+ }
+
+ if (curl_errno($curl)) {
+ throw new ErrorException(curl_error($curl), curl_errno($curl));
+ }
+
+ return $response;
+ }
+
+ protected function parse_header_array($array, $update_claimed_id)
+ {
+ $headers = array();
+ foreach($array as $header) {
+ $pos = strpos($header,':');
+ if ($pos !== false) {
+ $name = strtolower(trim(substr($header, 0, $pos)));
+ $headers[$name] = trim(substr($header, $pos+1));
+
+ # Following possible redirections. The point is just to have
+ # claimed_id change with them, because the redirections
+ # are followed automatically.
+ # We ignore redirections with relative paths.
+ # If any known provider uses them, file a bug report.
+ if($name == 'location' && $update_claimed_id) {
+ if(strpos($headers[$name], 'http') === 0) {
+ $this->identity = $this->claimed_id = $headers[$name];
+ } elseif($headers[$name][0] == '/') {
+ $parsed_url = parse_url($this->claimed_id);
+ $this->identity =
+ $this->claimed_id = $parsed_url['scheme'] . '://'
+ . $parsed_url['host']
+ . $headers[$name];
+ }
+ }
+ }
+ }
+ return $headers;
+ }
+
+ protected function request_streams($url, $method='GET', $params=array(), $update_claimed_id)
+ {
+ if(!$this->hostExists($url)) {
+ throw new ErrorException("Could not connect to $url.", 404);
+ }
+
+ $params = http_build_query($params, '', '&');
+ switch($method) {
+ case 'GET':
+ $opts = array(
+ 'http' => array(
+ 'method' => 'GET',
+ 'header' => 'Accept: application/xrds+xml, */*',
+ 'ignore_errors' => true,
+ ), 'ssl' => array(
+ 'CN_match' => parse_url($url, PHP_URL_HOST),
+ ),
+ );
+ $url = $url . ($params ? '?' . $params : '');
+ if (!empty($this->proxy)) {
+ $opts['http']['proxy'] = $this->proxy_url();
+ }
+ break;
+ case 'POST':
+ $opts = array(
+ 'http' => array(
+ 'method' => 'POST',
+ 'header' => 'Content-type: application/x-www-form-urlencoded',
+ 'content' => $params,
+ 'ignore_errors' => true,
+ ), 'ssl' => array(
+ 'CN_match' => parse_url($url, PHP_URL_HOST),
+ ),
+ );
+ if (!empty($this->proxy)) {
+ $opts['http']['proxy'] = $this->proxy_url();
+ }
+ break;
+ case 'HEAD':
+ // We want to send a HEAD request, but since get_headers() doesn't
+ // accept $context parameter, we have to change the defaults.
+ $default = stream_context_get_options(stream_context_get_default());
+
+ // PHP does not reset all options. Instead, it just sets the options
+ // available in the passed array, therefore set the defaults manually.
+ $default += array(
+ 'http' => array(),
+ 'ssl' => array()
+ );
+ $default['http'] += array(
+ 'method' => 'GET',
+ 'header' => '',
+ 'ignore_errors' => false
+ );
+ $default['ssl'] += array(
+ 'CN_match' => ''
+ );
+
+ $opts = array(
+ 'http' => array(
+ 'method' => 'HEAD',
+ 'header' => 'Accept: application/xrds+xml, */*',
+ 'ignore_errors' => true,
+ ),
+ 'ssl' => array(
+ 'CN_match' => parse_url($url, PHP_URL_HOST)
+ )
+ );
+
+ // Enable validation of the SSL certificates.
+ if ($this->verify_peer) {
+ $default['ssl'] += array(
+ 'verify_peer' => false,
+ 'capath' => '',
+ 'cafile' => ''
+ );
+ $opts['ssl'] += array(
+ 'verify_peer' => true,
+ 'capath' => $this->capath,
+ 'cafile' => $this->cainfo
+ );
+ }
+
+ // Change the stream context options.
+ stream_context_get_default($opts);
+
+ $headers = get_headers($url . ($params ? '?' . $params : ''));
+
+ // Restore the stream context options.
+ stream_context_get_default($default);
+
+ if (!empty($headers)) {
+ if (intval(substr($headers[0], strlen('HTTP/1.1 '))) == 405) {
+ // The server doesn't support HEAD - emulate it with a GET.
+ $args = func_get_args();
+ $args[1] = 'GET';
+ call_user_func_array(array($this, 'request_streams'), $args);
+ $headers = $this->headers;
+ } else {
+ $headers = $this->parse_header_array($headers, $update_claimed_id);
+ }
+ } else {
+ $headers = array();
+ }
+
+ return $headers;
+ }
+
+ if ($this->verify_peer) {
+ $opts['ssl'] += array(
+ 'verify_peer' => true,
+ 'capath' => $this->capath,
+ 'cafile' => $this->cainfo
+ );
+ }
+
+ $context = stream_context_create ($opts);
+ $data = file_get_contents($url, false, $context);
+ # This is a hack for providers who don't support HEAD requests.
+ # It just creates the headers array for the last request in $this->headers.
+ if(isset($http_response_header)) {
+ $this->headers = $this->parse_header_array($http_response_header, $update_claimed_id);
+ }
+
+ return $data;
+ }
+
+ protected function request($url, $method='GET', $params=array(), $update_claimed_id=false)
+ {
+ if (function_exists('curl_init')
+ && (!in_array('https', stream_get_wrappers()) || !ini_get('safe_mode') && !ini_get('open_basedir'))
+ ) {
+ return $this->request_curl($url, $method, $params, $update_claimed_id);
+ }
+ return $this->request_streams($url, $method, $params, $update_claimed_id);
+ }
+
+ protected function proxy_url()
+ {
+ $result = '';
+
+ if (!empty($this->proxy)) {
+ $result = $this->proxy['host'];
+
+ if (!empty($this->proxy['port'])) {
+ $result = $result . ':' . $this->proxy['port'];
+ }
+
+ if (!empty($this->proxy['user'])) {
+ $result = $this->proxy['user'] . ':' . $this->proxy['pass'] . '@' . $result;
+ }
+
+ $result = 'http://' . $result;
+ }
+
+ return $result;
+ }
+
+ protected function build_url($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'])
+ && (strpos($headers['content-type'], 'application/xrds+xml') !== false
+ || strpos($headers['content-type'], 'text/xml') !== false)
+ ) {
+ # Apparently, some providers return XRDS documents as text/html.
+ # While it is against the spec, allowing this here shouldn't break
+ # compatibility with anything.
+ # ---
+ # 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 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;
+ }
+}
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