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+<?php
+/*
+ FREE TO USE
+ Under License: GPLv3
+ Simple OpenID PHP Class
+
+ Some modifications by Eddie Roosenmaallen, eddie@roosenmaallen.com
+
+-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
+
+This Class was written to make easy for you to integrate OpenID on your website.
+This is just a client, which checks for user's identity. This Class Requires CURL Module.
+It should be easy to use some other HTTP Request Method, but remember, often OpenID servers
+are using SSL.
+We need to be able to perform SSL Verification on the background to check for valid signature.
+
+HOW TO USE THIS CLASS:
+ STEP 1)
+ $openid = new SimpleOpenID;
+ :: SET IDENTITY ::
+ $openid->SetIdentity($_POST['openid_url']);
+ :: SET RETURN URL ::
+ $openid->SetApprovedURL('http://www.yoursite.com/return.php'); // Script which handles a response from OpenID Server
+ :: SET TRUST ROOT ::
+ $openid->SetTrustRoot('http://www.yoursite.com/');
+ :: FETCH SERVER URL FROM IDENTITY PAGE :: [Note: It is recomended to cache this (Session, Cookie, Database)]
+ $openid->GetOpenIDServer(); // Returns false if server is not found
+ :: REDIRECT USER TO OPEN ID SERVER FOR APPROVAL ::
+
+ :: (OPTIONAL) SET OPENID SERVER ::
+ $openid->SetOpenIDServer($server_url); // If you have cached previously this, you don't have to call GetOpenIDServer and set value this directly
+
+ STEP 2)
+ Once user gets returned we must validate signature
+ :: VALIDATE REQUEST ::
+ true|false = $openid->ValidateWithServer();
+
+ ERRORS:
+ array = $openid->GetError(); // Get latest Error code
+
+ FIELDS:
+ OpenID allowes you to retreive a profile. To set what fields you'd like to get use (accepts either string or array):
+ $openid->SetRequiredFields(array('email','fullname','dob','gender','postcode','country','language','timezone'));
+ or
+ $openid->SetOptionalFields('postcode');
+
+IMPORTANT TIPS:
+OPENID as is now, is not trust system. It is a great single-sign on method. If you want to
+store information about OpenID in your database for later use, make sure you handle url identities
+properly.
+ For example:
+ https://steve.myopenid.com/
+ https://steve.myopenid.com
+ http://steve.myopenid.com/
+ http://steve.myopenid.com
+ ... are representing one single user. Some OpenIDs can be in format openidserver.com/users/user/ - keep this in mind when storing identities
+
+ To help you store an OpenID in your DB, you can use function:
+ $openid_db_safe = $openid->OpenID_Standarize($upenid);
+ This may not be comatible with current specs, but it works in current enviroment. Use this function to get openid
+ in one format like steve.myopenid.com (without trailing slashes and http/https).
+ Use output to insert Identity to database. Don't use this for validation - it may fail.
+
+*/
+
+class SimpleOpenID{
+ var $openid_url_identity;
+ var $URLs = array();
+ var $error = array();
+ var $fields = array(
+ 'required' => array(),
+ 'optional' => array(),
+ );
+
+ function SimpleOpenID(){
+ if (!function_exists('curl_exec')) {
+ die('Error: Class SimpleOpenID requires curl extension to work');
+ }
+ }
+ function SetOpenIDServer($a){
+ $this->URLs['openid_server'] = $a;
+ }
+ function SetTrustRoot($a){
+ $this->URLs['trust_root'] = $a;
+ }
+ function SetCancelURL($a){
+ $this->URLs['cancel'] = $a;
+ }
+ function SetApprovedURL($a){
+ $this->URLs['approved'] = $a;
+ }
+ function SetRequiredFields($a){
+ if (is_array($a)){
+ $this->fields['required'] = $a;
+ }else{
+ $this->fields['required'][] = $a;
+ }
+ }
+ function SetOptionalFields($a){
+ if (is_array($a)){
+ $this->fields['optional'] = $a;
+ }else{
+ $this->fields['optional'][] = $a;
+ }
+ }
+ function SetIdentity($a){ // Set Identity URL
+ if ((stripos($a, 'http://') === false)
+ && (stripos($a, 'https://') === false)){
+ $a = 'http://'.$a;
+ }
+/*
+ $u = parse_url(trim($a));
+ if (!isset($u['path'])){
+ $u['path'] = '/';
+ }else if(substr($u['path'],-1,1) == '/'){
+ $u['path'] = substr($u['path'], 0, strlen($u['path'])-1);
+ }
+ if (isset($u['query'])){ // If there is a query string, then use identity as is
+ $identity = $a;
+ }else{
+ $identity = $u['scheme'] . '://' . $u['host'] . $u['path'];
+ }
+//*/
+ $this->openid_url_identity = $a;
+ }
+ function GetIdentity(){ // Get Identity
+ return $this->openid_url_identity;
+ }
+ function GetError(){
+ $e = $this->error;
+ return array('code'=>$e[0],'description'=>$e[1]);
+ }
+
+ function ErrorStore($code, $desc = null){
+ $errs['OPENID_NOSERVERSFOUND'] = 'Cannot find OpenID Server TAG on Identity page.';
+ if ($desc == null){
+ $desc = $errs[$code];
+ }
+ $this->error = array($code,$desc);
+ }
+
+ function IsError(){
+ if (count($this->error) > 0){
+ return true;
+ }else{
+ return false;
+ }
+ }
+
+ function splitResponse($response) {
+ $r = array();
+ $response = explode("\n", $response);
+ foreach($response as $line) {
+ $line = trim($line);
+ if ($line != "") {
+ list($key, $value) = explode(":", $line, 2);
+ $r[trim($key)] = trim($value);
+ }
+ }
+ return $r;
+ }
+
+ function OpenID_Standarize($openid_identity = null){
+ if ($openid_identity === null)
+ $openid_identity = $this->openid_url_identity;
+
+ $u = parse_url(strtolower(trim($openid_identity)));
+
+ if (!isset($u['path']) || ($u['path'] == '/')) {
+ $u['path'] = '';
+ }
+ if(substr($u['path'],-1,1) == '/'){
+ $u['path'] = substr($u['path'], 0, strlen($u['path'])-1);
+ }
+ if (isset($u['query'])){ // If there is a query string, then use identity as is
+ return $u['host'] . $u['path'] . '?' . $u['query'];
+ }else{
+ return $u['host'] . $u['path'];
+ }
+ }
+
+ function array2url($arr){ // converts associated array to URL Query String
+ if (!is_array($arr)){
+ return false;
+ }
+ $query = '';
+ foreach($arr as $key => $value){
+ $query .= $key . "=" . $value . "&";
+ }
+ return $query;
+ }
+ function FSOCK_Request($url, $method="GET", $params = ""){
+ $fp = fsockopen("ssl://www.myopenid.com", 443, $errno, $errstr, 3); // Connection timeout is 3 seconds
+ if (!$fp) {
+ $this->ErrorStore('OPENID_SOCKETERROR', $errstr);
+ return false;
+ } else {
+ $request = $method . " /server HTTP/1.0\r\n";
+ $request .= "User-Agent: Simple OpenID PHP Class (http://www.phpclasses.org/simple_openid)\r\n";
+ $request .= "Connection: close\r\n\r\n";
+ fwrite($fp, $request);
+ stream_set_timeout($fp, 4); // Connection response timeout is 4 seconds
+ $res = fread($fp, 2000);
+ $info = stream_get_meta_data($fp);
+ fclose($fp);
+
+ if ($info['timed_out']) {
+ $this->ErrorStore('OPENID_SOCKETTIMEOUT');
+ } else {
+ return $res;
+ }
+ }
+ }
+ function CURL_Request($url, $method="GET", $params = "") { // Remember, SSL MUST BE SUPPORTED
+ if (is_array($params)) $params = $this->array2url($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($curl, CURLOPT_HTTPGET, ($method == "GET"));
+ curl_setopt($curl, CURLOPT_POST, ($method == "POST"));
+ if ($method == "POST") curl_setopt($curl, CURLOPT_POSTFIELDS, $params);
+ curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
+ $response = curl_exec($curl);
+
+ if (curl_errno($curl) == 0){
+ $response;
+ }else{
+ $this->ErrorStore('OPENID_CURL', curl_error($curl));
+ }
+ return $response;
+ }
+
+ function HTML2OpenIDServer($content) {
+ $get = array();
+
+ // Get details of their OpenID server and (optional) delegate
+ preg_match_all('/<link[^>]*rel=[\'"](openid2.provider )?openid.server[\'"][^>]*href=[\'"]([^\'"]+)[\'"][^>]*\/?>/i', $content, $matches1);
+ preg_match_all('/<link[^>]*href=\'"([^\'"]+)[\'"][^>]*rel=[\'"](openid2.provider )?openid.server[\'"][^>]*\/?>/i', $content, $matches2);
+ $servers = array_merge($matches1[2], $matches2[1]);
+
+ preg_match_all('/<link[^>]*rel=[\'"]openid.delegate[\'"][^>]*href=[\'"]([^\'"]+)[\'"][^>]*\/?>/i', $content, $matches1);
+
+ preg_match_all('/<link[^>]*href=[\'"]([^\'"]+)[\'"][^>]*rel=[\'"]openid.delegate[\'"][^>]*\/?>/i', $content, $matches2);
+
+ $delegates = array_merge($matches1[1], $matches2[1]);
+
+ $ret = array($servers, $delegates);
+ return $ret;
+ }
+
+ function GetOpenIDServer(){
+ $response = $this->CURL_Request($this->openid_url_identity);
+ list($servers, $delegates) = $this->HTML2OpenIDServer($response);
+ if (count($servers) == 0){
+ $this->ErrorStore('OPENID_NOSERVERSFOUND');
+ return false;
+ }
+ if (isset($delegates[0])
+ && ($delegates[0] != "")){
+ $this->SetIdentity($delegates[0]);
+ }
+ $this->SetOpenIDServer($servers[0]);
+ return $servers[0];
+ }
+
+ function GetRedirectURL(){
+ $params = array();
+ $params['openid.return_to'] = urlencode($this->URLs['approved']);
+ $params['openid.mode'] = 'checkid_setup';
+ $params['openid.identity'] = urlencode($this->openid_url_identity);
+ $params['openid.trust_root'] = urlencode($this->URLs['trust_root']);
+
+ if (isset($this->fields['required'])
+ && (count($this->fields['required']) > 0)) {
+ $params['openid.sreg.required'] = implode(',',$this->fields['required']);
+ }
+ if (isset($this->fields['optional'])
+ && (count($this->fields['optional']) > 0)) {
+ $params['openid.sreg.optional'] = implode(',',$this->fields['optional']);
+ }
+ return $this->URLs['openid_server'] . "?". $this->array2url($params);
+ }
+
+ function Redirect(){
+ $redirect_to = $this->GetRedirectURL();
+ if (headers_sent()){ // Use JavaScript to redirect if content has been previously sent (not recommended, but safe)
+ echo '<script language="JavaScript" type="text/javascript">window.location=\'';
+ echo $redirect_to;
+ echo '\';</script>';
+ }else{ // Default Header Redirect
+ header('Location: ' . $redirect_to);
+ }
+ }
+
+ function ValidateWithServer(){
+ $params = array(
+ 'openid.assoc_handle' => urlencode($_GET['openid_assoc_handle']),
+ 'openid.signed' => urlencode($_GET['openid_signed']),
+ 'openid.sig' => urlencode($_GET['openid_sig'])
+ );
+ // Send only required parameters to confirm validity
+ $arr_signed = explode(",",str_replace('sreg.','sreg_',$_GET['openid_signed']));
+ for ($i=0; $i<count($arr_signed); $i++){
+ $s = str_replace('sreg_','sreg.', $arr_signed[$i]);
+ $c = $_GET['openid_' . $arr_signed[$i]];
+ // if ($c != ""){
+ $params['openid.' . $s] = urlencode($c);
+ // }
+ }
+ $params['openid.mode'] = "check_authentication";
+
+ $openid_server = $this->GetOpenIDServer();
+ if ($openid_server == false){
+ return false;
+ }
+ $response = $this->CURL_Request($openid_server,'POST',$params);
+ $data = $this->splitResponse($response);
+
+ if ($data['is_valid'] == "true") {
+ return true;
+ }else{
+ return false;
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-04 12:17:57 +0000