327 lines
10 KiB
PHP
327 lines
10 KiB
PHP
<?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;
|
|
}
|
|
}
|
|
}
|