openid lib
This commit is contained in:
Friendika
parent
f8a4bf5987
commit
5e81c615a4
1 changed files with 725 additions and 0 deletions
725
library/openid.php
Normal file
725
library/openid.php
Normal file
|
|
@ -0,0 +1,725 @@
|
|||
<?php
|
||||
/**
|
||||
* 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;
|
||||
* $openid->identity = 'ID supplied by user';
|
||||
* header('Location: ' . $openid->authUrl());
|
||||
* </code>
|
||||
* The provider then sends various parameters via GET, one of them is openid_mode.
|
||||
* Step two is verification:
|
||||
* <code>
|
||||
* if ($this->data['openid_mode']) {
|
||||
* $openid = new LightOpenID;
|
||||
* echo $openid->validate() ? 'Logged in.' : 'Failed';
|
||||
* }
|
||||
* </code>
|
||||
*
|
||||
* 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']; # without the query part, if present
|
||||
* 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_perr = null
|
||||
, $capath = null;
|
||||
private $identity, $claimed_id;
|
||||
protected $server, $version, $trustRoot, $aliases, $identifier_select = false
|
||||
, $ax = false, $sreg = false, $data;
|
||||
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()
|
||||
{
|
||||
$this->trustRoot = (!empty($_SERVER['HTTPS']) ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'];
|
||||
$uri = $_SERVER['REQUEST_URI'];
|
||||
$uri = strpos($uri, '?') ? substr($uri, 0, strpos($uri, '?')) : $uri;
|
||||
$this->returnUrl = $this->trustRoot . $uri;
|
||||
|
||||
$this->data = $_POST + $_GET; # OPs may send data as POST or GET.
|
||||
}
|
||||
|
||||
function __set($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;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 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())
|
||||
{
|
||||
$params = http_build_query($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($this->verify_perr !== null) {
|
||||
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, $this->verify_peer);
|
||||
if($this->capath) {
|
||||
curl_setopt($curl, CURLOPT_CAPATH, $this->capath);
|
||||
}
|
||||
}
|
||||
|
||||
if ($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_HTTPGET, true);
|
||||
}
|
||||
$response = curl_exec($curl);
|
||||
|
||||
if($method == 'HEAD') {
|
||||
$headers = array();
|
||||
foreach(explode("\n", $response) as $header) {
|
||||
$pos = strpos($header,':');
|
||||
$name = strtolower(trim(substr($header, 0, $pos)));
|
||||
$headers[$name] = trim(substr($header, $pos+1));
|
||||
}
|
||||
|
||||
# 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;
|
||||
}
|
||||
|
||||
return $headers;
|
||||
}
|
||||
|
||||
if (curl_errno($curl)) {
|
||||
throw new ErrorException(curl_error($curl), curl_errno($curl));
|
||||
}
|
||||
|
||||
return $response;
|
||||
}
|
||||
|
||||
protected function request_streams($url, $method='GET', $params=array())
|
||||
{
|
||||
if(!$this->hostExists($url)) {
|
||||
throw new ErrorException('Invalid request.');
|
||||
}
|
||||
|
||||
$params = http_build_query($params, '', '&');
|
||||
switch($method) {
|
||||
case 'GET':
|
||||
$opts = array(
|
||||
'http' => array(
|
||||
'method' => 'GET',
|
||||
'header' => 'Accept: application/xrds+xml, */*',
|
||||
'ignore_errors' => true,
|
||||
)
|
||||
);
|
||||
$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,
|
||||
)
|
||||
);
|
||||
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,
|
||||
))
|
||||
);
|
||||
|
||||
$url = $url . ($params ? '?' . $params : '');
|
||||
$headers_tmp = get_headers ($url);
|
||||
if(!$headers_tmp) {
|
||||
return array();
|
||||
}
|
||||
|
||||
# Parsing headers.
|
||||
$headers = array();
|
||||
foreach($headers_tmp as $header) {
|
||||
$pos = strpos($header,':');
|
||||
$name = strtolower(trim(substr($header, 0, $pos)));
|
||||
$headers[$name] = trim(substr($header, $pos+1));
|
||||
|
||||
# Following possible redirections. The point is just to have
|
||||
# claimed_id change with them, because get_headers() will
|
||||
# follow redirections automatically.
|
||||
# We ignore redirections with relative paths.
|
||||
# If any known provider uses them, file a bug report.
|
||||
if($name == 'location') {
|
||||
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];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
# And restore them.
|
||||
stream_context_get_default($default);
|
||||
return $headers;
|
||||
}
|
||||
|
||||
if($this->verify_peer) {
|
||||
$opts += array('ssl' => array(
|
||||
'verify_peer' => true,
|
||||
'capath' => $this->capath,
|
||||
));
|
||||
}
|
||||
|
||||
$context = stream_context_create ($opts);
|
||||
|
||||
return file_get_contents($url, false, $context);
|
||||
}
|
||||
|
||||
protected function request($url, $method='GET', $params=array())
|
||||
{
|
||||
if(function_exists('curl_init') && !ini_get('safe_mode')) {
|
||||
return $this->request_curl($url, $method, $params);
|
||||
}
|
||||
return $this->request_streams($url, $method, $params);
|
||||
}
|
||||
|
||||
protected function build_url($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');
|
||||
|
||||
$next = false;
|
||||
if (isset($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
|
||||
) {
|
||||
# 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');
|
||||
if ($location = $this->htmlTag($content, 'meta', 'http-equiv', 'X-XRDS-Location', 'content')) {
|
||||
$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 servers found!');
|
||||
}
|
||||
throw new ErrorException('Endless redirection!');
|
||||
}
|
||||
|
||||
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()
|
||||
{
|
||||
$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' => '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($params, '', '&')));
|
||||
}
|
||||
|
||||
protected function authUrl_v2($identifier_select)
|
||||
{
|
||||
$params = array(
|
||||
'openid.ns' => 'http://specs.openid.net/auth/2.0',
|
||||
'openid.mode' => '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() + $this->sregParams();
|
||||
}
|
||||
|
||||
if ($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 $select_identifier Whether to request OP to select identity for an user in OpenID 2. Does not affect OpenID 1.
|
||||
* @throws ErrorException
|
||||
*/
|
||||
function authUrl($identifier_select = null)
|
||||
{
|
||||
if (!$this->server) $this->discover($this->identity);
|
||||
|
||||
if ($this->version == 2) {
|
||||
if ($identifier_select === null) {
|
||||
return $this->authUrl_v2($this->identifier_select);
|
||||
}
|
||||
return $this->authUrl_v2($identifier_select);
|
||||
}
|
||||
return $this->authUrl_v1();
|
||||
}
|
||||
|
||||
/**
|
||||
* Performs OpenID verification with the OP.
|
||||
* @return Bool Whether the verification was successful.
|
||||
* @throws ErrorException
|
||||
*/
|
||||
function validate()
|
||||
{
|
||||
$this->claimed_id = isset($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'])) {
|
||||
# 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.' . $item] = get_magic_quotes_gpc() ? stripslashes($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();
|
||||
}
|
||||
|
||||
$attributes = array();
|
||||
foreach ($this->data as $key => $value) {
|
||||
$keyMatch = 'openid_' . $alias . '_value_';
|
||||
if (substr($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;
|
||||
}
|
||||
$key = substr($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 ($this->data as $key => $value) {
|
||||
$keyMatch = 'openid_sreg_';
|
||||
if (substr($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]] = $value;
|
||||
}
|
||||
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();
|
||||
}
|
||||
}
|
||||
Loading…
Reference in a new issue