diff options
Diffstat (limited to 'library')
| -rw-r--r-- | library/openid/README | 49 | ||||
| -rw-r--r-- | library/openid/example-google.php | 24 | ||||
| -rw-r--r-- | library/openid/example.php | 23 | ||||
| -rw-r--r-- | library/openid/openid.php (renamed from library/openid.php) | 268 | ||||
| -rw-r--r-- | library/openid/provider/example-mysql.php | 194 | ||||
| -rw-r--r-- | library/openid/provider/example.php | 53 | ||||
| -rw-r--r-- | library/openid/provider/provider.php | 845 |
7 files changed, 1350 insertions, 106 deletions
diff --git a/library/openid/README b/library/openid/README new file mode 100644 index 000000000..799b452ac --- /dev/null +++ b/library/openid/README @@ -0,0 +1,49 @@ +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: ' . $openid->authUrl()); +</code> + +The provider then sends various parameters via GET, one of them is openid_mode. +Step two is verification: +<code> +if ($this->data['openid_mode']) { + $openid = new LightOpenID('my-host.example.org'); + 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 +@contributors Brice http://github.com/brice/ +@copyright Copyright (c) 2010, Mewp +@copyright Copyright (c) 2010, Brice +@license http://www.opensource.org/licenses/mit-license.php MIT
\ No newline at end of file diff --git a/library/openid/example-google.php b/library/openid/example-google.php new file mode 100644 index 000000000..f23f2cc48 --- /dev/null +++ b/library/openid/example-google.php @@ -0,0 +1,24 @@ +<?php +# Logging in with Google accounts requires setting special identity, so this example shows how to do it. +require 'openid.php'; +try { + # Change 'localhost' to your domain name. + $openid = new LightOpenID('localhost'); + if(!$openid->mode) { + if(isset($_GET['login'])) { + $openid->identity = 'https://www.google.com/accounts/o8/id'; + header('Location: ' . $openid->authUrl()); + } +?> +<form action="?login" method="post"> + <button>Login with Google</button> +</form> +<?php + } elseif($openid->mode == 'cancel') { + echo 'User has canceled authentication!'; + } else { + echo 'User ' . ($openid->validate() ? $openid->identity . ' has ' : 'has not ') . 'logged in.'; + } +} catch(ErrorException $e) { + echo $e->getMessage(); +} diff --git a/library/openid/example.php b/library/openid/example.php new file mode 100644 index 000000000..e4ab107fe --- /dev/null +++ b/library/openid/example.php @@ -0,0 +1,23 @@ +<?php +require 'openid.php'; +try { + # Change 'localhost' to your domain name. + $openid = new LightOpenID('localhost'); + if(!$openid->mode) { + if(isset($_POST['openid_identifier'])) { + $openid->identity = $_POST['openid_identifier']; + header('Location: ' . $openid->authUrl()); + } +?> +<form action="" method="post"> + OpenID: <input type="text" name="openid_identifier" /> <button>Submit</button> +</form> +<?php + } elseif($openid->mode == 'cancel') { + echo 'User has canceled authentication!'; + } else { + echo 'User ' . ($openid->validate() ? $openid->identity . ' has ' : 'has not ') . 'logged in.'; + } +} catch(ErrorException $e) { + echo $e->getMessage(); +} diff --git a/library/openid.php b/library/openid/openid.php index 3c58beb8a..00250c59d 100644 --- a/library/openid.php +++ b/library/openid/openid.php @@ -8,7 +8,7 @@ * Sign-on with OpenID is a two step process: * Step one is authentication with the provider: * <code> - * $openid = new LightOpenID; + * $openid = new LightOpenID('my-host.example.org'); * $openid->identity = 'ID supplied by user'; * header('Location: ' . $openid->authUrl()); * </code> @@ -16,15 +16,18 @@ * Step two is verification: * <code> * if ($this->data['openid_mode']) { - * $openid = new LightOpenID; + * $openid = new LightOpenID('my-host.example.org'); * 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']; # without the query part, if present + * $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. @@ -39,7 +42,7 @@ * To get the values, use $openid->getAttributes(). * * - * The library requires PHP >= 5.1.2 with curl or http/https stream wrappers enabled.. + * 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 @@ -49,11 +52,13 @@ class LightOpenID public $returnUrl , $required = array() , $optional = array() - , $verify_perr = null - , $capath = null; + , $verify_peer = null + , $capath = null + , $cainfo = null + , $data; private $identity, $claimed_id; protected $server, $version, $trustRoot, $aliases, $identifier_select = false - , $ax = false, $sreg = false, $data; + , $ax = false, $sreg = false, $setup_url = null; static protected $ax_to_sreg = array( 'namePerson/friendly' => 'nickname', 'contact/email' => 'email', @@ -66,14 +71,28 @@ class LightOpenID 'pref/timezone' => 'timezone', ); - function __construct() + function __construct($host) { - $this->trustRoot = (!empty($_SERVER['HTTPS']) ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST']; - $uri = $_SERVER['REQUEST_URI']; - $uri = strpos($uri, '?') ? substr($uri, 0, strpos($uri, '?')) : $uri; + $this->trustRoot = (strpos($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 = $_POST + $_GET; # OPs may send data as POST or GET. + $this->data = ($_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) @@ -109,6 +128,8 @@ class LightOpenID case 'trustRoot': case 'realm': return $this->trustRoot; + case 'mode': + return empty($this->data['openid_mode']) ? null : $this->data['openid_mode']; } } @@ -143,11 +164,15 @@ class LightOpenID curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); curl_setopt($curl, CURLOPT_HTTPHEADER, array('Accept: application/xrds+xml, */*')); - if($this->verify_perr !== null) { + 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') { @@ -188,7 +213,7 @@ class LightOpenID protected function request_streams($url, $method='GET', $params=array()) { if(!$this->hostExists($url)) { - throw new ErrorException('Invalid request.'); + throw new ErrorException("Could not connect to $url.", 404); } $params = http_build_query($params, '', '&'); @@ -199,7 +224,9 @@ class LightOpenID '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; @@ -210,7 +237,9 @@ class LightOpenID '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': @@ -219,11 +248,15 @@ class LightOpenID # we have to change the defaults. $default = stream_context_get_options(stream_context_get_default()); stream_context_get_default( - array('http' => array( - 'method' => 'HEAD', - 'header' => 'Accept: application/xrds+xml, */*', - 'ignore_errors' => true, - )) + array( + 'http' => array( + 'method' => 'HEAD', + 'header' => 'Accept: application/xrds+xml, */*', + 'ignore_errors' => true, + ), 'ssl' => array( + 'CN_match' => parse_url($url, PHP_URL_HOST), + ), + ) ); $url = $url . ($params ? '?' . $params : ''); @@ -263,10 +296,11 @@ class LightOpenID } if($this->verify_peer) { - $opts += array('ssl' => array( + $opts['ssl'] += array( 'verify_peer' => true, 'capath' => $this->capath, - )); + 'cafile' => $this->cainfo, + ); } $context = stream_context_create ($opts); @@ -276,7 +310,9 @@ class LightOpenID protected function request($url, $method='GET', $params=array()) { - if(function_exists('curl_init') && !ini_get('safe_mode') && (! strlen(ini_get('open_basedir')))) { + 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); } return $this->request_streams($url, $method, $params); @@ -297,7 +333,7 @@ class LightOpenID . (empty($url['port'])?'':":{$url['port']}") . (empty($url['path'])?'':$url['path']) . (empty($url['query'])?'':"?{$url['query']}") - . (empty($url['fragment'])?'':":{$url['fragment']}"); + . (empty($url['fragment'])?'':"#{$url['fragment']}"); return $url; } @@ -342,84 +378,90 @@ class LightOpenID $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['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))) { - # 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; -logger('Server: ' . $server); - $this->server = $server; - return $server; + if (isset($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>'); - # 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; - } + $server = $server[1]; + if (isset($delegate[2])) $this->identity = trim($delegate[2]); + $this->version = 2; + + $this->server = $server; + return $server; } - $next = true; - $yadis = false; - $url = $originalUrl; - $content = null; - break; + # 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')) { + $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'); -logger('openid' . $content); + # 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'); @@ -443,9 +485,9 @@ logger('openid' . $content); return $server; } - throw new ErrorException('No servers found!'); + throw new ErrorException("No OpenID Server found at $url", 404); } - throw new ErrorException('Endless redirection!'); + throw new ErrorException('Endless redirection!', 500); } protected function sregParams() @@ -514,7 +556,7 @@ logger('openid' . $content); return $params; } - protected function authUrl_v1() + protected function authUrl_v1($immediate) { $returnUrl = $this->returnUrl; # If we have an openid.delegate that is different from our claimed id, @@ -526,7 +568,7 @@ logger('openid' . $content); $params = array( 'openid.return_to' => $returnUrl, - 'openid.mode' => 'checkid_setup', + 'openid.mode' => $immediate ? 'checkid_immediate' : 'checkid_setup', 'openid.identity' => $this->identity, 'openid.trust_root' => $this->trustRoot, ) + $this->sregParams(); @@ -535,11 +577,11 @@ logger('openid' . $content); , array('query' => http_build_query($params, '', '&'))); } - protected function authUrl_v2($identifier_select) + protected function authUrl_v2($immediate) { $params = array( 'openid.ns' => 'http://specs.openid.net/auth/2.0', - 'openid.mode' => 'checkid_setup', + 'openid.mode' => $immediate ? 'checkid_immediate' : 'checkid_setup', 'openid.return_to' => $this->returnUrl, 'openid.realm' => $this->trustRoot, ); @@ -555,7 +597,7 @@ logger('openid' . $content); $params += $this->axParams() + $this->sregParams(); } - if ($identifier_select) { + if ($this->identifier_select) { $params['openid.identity'] = $params['openid.claimed_id'] = 'http://specs.openid.net/auth/2.0/identifier_select'; } else { @@ -573,17 +615,15 @@ logger('openid' . $content); * @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) + function authUrl($immediate = false) { + if ($this->setup_url && !$immediate) return $this->setup_url; if (!$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 $this->authUrl_v2($immediate); } - return $this->authUrl_v1(); + return $this->authUrl_v1($immediate); } /** @@ -593,6 +633,18 @@ logger('openid' . $content); */ function validate() { + # If the request was using immediate mode, a failure may be reported + # by presenting user_setup_url (for 1.1) or reporting + # mode 'setup_needed' (for 2.0). Also catching all modes other than + # id_res, in order to avoid throwing errors. + if(isset($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'], @@ -605,7 +657,9 @@ logger('openid' . $content); # 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'])) { + } 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, '?') ? '&' : '?') @@ -665,8 +719,8 @@ logger('openid' . $content); } $attributes = array(); - foreach ($this->data as $key => $value) { - $keyMatch = 'openid_' . $alias . '_value_'; + foreach (explode(',', $this->data['openid_signed']) as $key) { + $keyMatch = $alias . '.value.'; if (substr($key, 0, strlen($keyMatch)) != $keyMatch) { continue; } @@ -677,8 +731,10 @@ logger('openid' . $content); # 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; @@ -688,8 +744,8 @@ logger('openid' . $content); { $attributes = array(); $sreg_to_ax = array_flip(self::$ax_to_sreg); - foreach ($this->data as $key => $value) { - $keyMatch = 'openid_sreg_'; + foreach (explode(',', $this->data['openid_signed']) as $key) { + $keyMatch = 'sreg.'; if (substr($key, 0, strlen($keyMatch)) != $keyMatch) { continue; } @@ -698,7 +754,7 @@ logger('openid' . $content); # The field name isn't part of the SREG spec, so we ignore it. continue; } - $attributes[$sreg_to_ax[$key]] = $value; + $attributes[$sreg_to_ax[$key]] = $this->data['openid_sreg_' . $key]; } return $attributes; } diff --git a/library/openid/provider/example-mysql.php b/library/openid/provider/example-mysql.php new file mode 100644 index 000000000..574e3c811 --- /dev/null +++ b/library/openid/provider/example-mysql.php @@ -0,0 +1,194 @@ +<?php +/** + * This example shows several things: + * - How a setup interface should look like. + * - How to use a mysql table for authentication + * - How to store associations in mysql table, instead of php sessions. + * - How to store realm authorizations. + * - How to send AX/SREG parameters. + * For the example to work, you need to create the necessary tables: +CREATE TABLE Users ( + id INT NOT NULL auto_increment PRIMARY KEY, + login VARCHAR(32) NOT NULL, + password CHAR(40) NOT NULL, + firstName VARCHAR(32) NOT NULL, + lastName VARCHAR(32) NOT NULL +); + +CREATE TABLE AllowedSites ( + user INT NOT NULL, + realm TEXT NOT NULL, + attributes TEXT NOT NULL, + INDEX(user) +); + +CREATE TABLE Associations ( + id INT NOT NULL PRIMARY KEY, + data TEXT NOT NULL +); + * + * This is only an example. Don't use it in your code as-is. + * It has several security flaws, which you shouldn't copy (like storing plaintext login and password in forms). + * + * This setup could be very easily flooded with many associations, + * since non-private ones aren't automatically deleted. + * You could prevent this by storing a date of association and removing old ones, + * or by setting $this->dh = false; + * However, the latter one would disable stateful mode, unless connecting via HTTPS. + */ +require 'provider.php'; + +mysql_connect(); +mysql_select_db('test'); + +function getUserData($handle=null) +{ + if(isset($_POST['login'],$_POST['password'])) { + $login = mysql_real_escape_string($_POST['login']); + $password = sha1($_POST['password']); + $q = mysql_query("SELECT * FROM Users WHERE login = '$login' AND password = '$password'"); + if($data = mysql_fetch_assoc($q)) { + return $data; + } + if($handle) { + echo 'Wrong login/password.'; + } + } + if($handle) { + ?> + <form action="" method="post"> + <input type="hidden" name="openid.assoc_handle" value="<?php echo $handle?>"> + Login: <input type="text" name="login"><br> + Password: <input type="password" name="password"><br> + <button>Submit</button> + </form> + <?php + die(); + } +} + +class MysqlProvider extends LightOpenIDProvider +{ + private $attrMap = array( + 'namePerson/first' => 'First name', + 'namePerson/last' => 'Last name', + 'namePerson/friendly' => 'Nickname (login)' + ); + + private $attrFieldMap = array( + 'namePerson/first' => 'firstName', + 'namePerson/last' => 'lastName', + 'namePerson/friendly' => 'login' + ); + + function setup($identity, $realm, $assoc_handle, $attributes) + { + $data = getUserData($assoc_handle); + echo '<form action="" method="post">' + . '<input type="hidden" name="openid.assoc_handle" value="' . $assoc_handle . '">' + . '<input type="hidden" name="login" value="' . $_POST['login'] .'">' + . '<input type="hidden" name="password" value="' . $_POST['password'] .'">' + . "<b>$realm</b> wishes to authenticate you."; + if($attributes['required'] || $attributes['optional']) { + echo " It also requests following information (required fields marked with *):" + . '<ul>'; + + foreach($attributes['required'] as $attr) { + if(isset($this->attrMap[$attr])) { + echo '<li>' + . '<input type="checkbox" name="attributes[' . $attr . ']"> ' + . $this->attrMap[$attr] . '(*)</li>'; + } + } + + foreach($attributes['optional'] as $attr) { + if(isset($this->attrMap[$attr])) { + echo '<li>' + . '<input type="checkbox" name="attributes[' . $attr . ']"> ' + . $this->attrMap[$attr] . '</li>'; + } + } + echo '</ul>'; + } + echo '<br>' + . '<button name="once">Allow once</button> ' + . '<button name="always">Always allow</button> ' + . '<button name="cancel">cancel</button> ' + . '</form>'; + } + + function checkid($realm, &$attributes) + { + if(isset($_POST['cancel'])) { + $this->cancel(); + } + + $data = getUserData(); + if(!$data) { + return false; + } + $realm = mysql_real_escape_string($realm); + $q = mysql_query("SELECT attributes FROM AllowedSites WHERE user = '{$data['id']}' AND realm = '$realm'"); + + $attrs = array(); + if($attrs = mysql_fetch_row($q)) { + $attrs = explode(',', $attributes[0]); + } elseif(isset($_POST['attributes'])) { + $attrs = array_keys($_POST['attributes']); + } elseif(!isset($_POST['once']) && !isset($_POST['always'])) { + return false; + } + + $attributes = array(); + foreach($attrs as $attr) { + if(isset($this->attrFieldMap[$attr])) { + $attributes[$attr] = $data[$this->attrFieldMap[$attr]]; + } + } + + if(isset($_POST['always'])) { + $attrs = mysql_real_escape_string(implode(',', array_keys($attributes))); + mysql_query("REPLACE INTO AllowedSites VALUES('{$data['id']}', '$realm', '$attrs')"); + } + + return $this->serverLocation . '?' . $data['login']; + } + + function assoc_handle() + { + # We generate an integer assoc handle, because it's just faster to look up an integer later. + $q = mysql_query("SELECT MAX(id) FROM Associations"); + $result = mysql_fetch_row($q); + return $q[0]+1; + } + + function setAssoc($handle, $data) + { + $data = mysql_real_escape_string(serialize($data)); + mysql_query("REPLACE INTO Associations VALUES('$handle', '$data')"); + } + + function getAssoc($handle) + { + if(!is_numeric($handle)) { + return false; + } + $q = mysql_query("SELECT data FROM Associations WHERE id = '$handle'"); + $data = mysql_fetch_row($q); + if(!$data) { + return false; + } + return unserialize($data[0]); + } + + function delAssoc($handle) + { + if(!is_numeric($handle)) { + return false; + } + mysql_query("DELETE FROM Associations WHERE id = '$handle'"); + } + +} +$op = new MysqlProvider; +$op->server(); diff --git a/library/openid/provider/example.php b/library/openid/provider/example.php new file mode 100644 index 000000000..b8a4c24a9 --- /dev/null +++ b/library/openid/provider/example.php @@ -0,0 +1,53 @@ +<?php +/** + * This example shows how to create a basic provider usin HTTP Authentication. + * This is only an example. You shouldn't use it as-is in your code. + */ +require 'provider.php'; + +class BasicProvider extends LightOpenIDProvider +{ + public $select_id = true; + public $login = ''; + public $password = ''; + + function __construct() + { + parent::__construct(); + + # If we use select_id, we must disable it for identity pages, + # so that an RP can discover it and get proper data (i.e. without select_id) + if(isset($_GET['id'])) { + $this->select_id = false; + } + } + + function setup($identity, $realm, $assoc_handle, $attributes) + { + header('WWW-Authenticate: Basic realm="' . $this->data['openid_realm'] . '"'); + header('HTTP/1.0 401 Unauthorized'); + } + + function checkid($realm, &$attributes) + { + if(!isset($_SERVER['PHP_AUTH_USER'])) { + return false; + } + + if ($_SERVER['PHP_AUTH_USER'] == $this->login + && $_SERVER['PHP_AUTH_PW'] == $this->password + ) { + # Returning identity + # It can be any url that leads here, or to any other place that hosts + # an XRDS document pointing here. + return $this->serverLocation . '?id=' . $this->login; + } + + return false; + } + +} +$op = new BasicProvider; +$op->login = 'test'; +$op->password = 'test'; +$op->server(); diff --git a/library/openid/provider/provider.php b/library/openid/provider/provider.php new file mode 100644 index 000000000..03fbe1c81 --- /dev/null +++ b/library/openid/provider/provider.php @@ -0,0 +1,845 @@ +<?php +/** + * Using this class, you can easily set up an OpenID Provider. + * It's independent of LightOpenID class. + * It requires either GMP or BCMath for session encryption, + * but will work without them (although either via SSL, or in stateless mode only). + * Also, it requires PHP >= 5.1.2 + * + * This is an alpha version, using it in production code is not recommended, + * until you are *sure* that it works and is secure. + * + * Please send me messages about your testing results + * (even if successful, so I know that it has been tested). + * Also, if you think there's a way to make it easier to use, tell me -- it's an alpha for a reason. + * Same thing applies to bugs in code, suggestions, + * and everything else you'd like to say about the library. + * + * There's no usage documentation here, see the examples. + * + * @author Mewp + * @copyright Copyright (c) 2010, Mewp + * @license http://www.opensource.org/licenses/mit-license.php MIT + */ +ini_set('error_log','log'); +abstract class LightOpenIDProvider +{ + # URL-s to XRDS and server location. + public $xrdsLocation, $serverLocation; + + # Should we operate in server, or signon mode? + public $select_id = false; + + # Lifetime of an association. + protected $assoc_lifetime = 600; + + # Variables below are either set automatically, or are constant. + # ----- + # Can we support DH? + protected $dh = true; + protected $ns = 'http://specs.openid.net/auth/2.0'; + protected $data, $assoc; + + # Default DH parameters as defined in the specification. + protected $default_modulus; + protected $default_gen = 'Ag=='; + + # AX <-> SREG transform + 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', + ); + + # Math + private $add, $mul, $pow, $mod, $div, $powmod; + # ----- + + # ------------------------------------------------------------------------ # + # Functions you probably want to implement when extending the class. + + /** + * Checks whether an user is authenticated. + * The function should determine what fields it wants to send to the RP, + * and put them in the $attributes array. + * @param Array $attributes + * @param String $realm Realm used for authentication. + * @return String OP-local identifier of an authenticated user, or an empty value. + */ + abstract function checkid($realm, &$attributes); + + /** + * Displays an user interface for inputting user's login and password. + * Attributes are always AX field namespaces, with stripped host part. + * For example, the $attributes array may be: + * array( 'required' => array('namePerson/friendly', 'contact/email'), + * 'optional' => array('pref/timezone', 'pref/language') + * @param String $identity Discovered identity string. May be used to extract login, unless using $this->select_id + * @param String $realm Realm used for authentication. + * @param String Association handle. must be sent as openid.assoc_handle in $_GET or $_POST in subsequent requests. + * @param Array User attributes requested by the RP. + */ + abstract function setup($identity, $realm, $assoc_handle, $attributes); + + /** + * Stores an association. + * If you want to use php sessions in your provider code, you have to replace it. + * @param String $handle Association handle -- should be used as a key. + * @param Array $assoc Association data. + */ + protected function setAssoc($handle, $assoc) + { + $oldSession = session_id(); + session_commit(); + session_id($assoc['handle']); + session_start(); + $_SESSION['assoc'] = $assoc; + session_commit(); + if($oldSession) { + session_id($oldSession); + session_start(); + } + } + + /** + * Retreives association data. + * If you want to use php sessions in your provider code, you have to replace it. + * @param String $handle Association handle. + * @return Array Association data. + */ + protected function getAssoc($handle) + { + $oldSession = session_id(); + session_commit(); + session_id($handle); + session_start(); + if(empty($_SESSION['assoc'])) { + return null; + } + return $_SESSION['assoc']; + session_commit(); + if($oldSession) { + session_id($oldSession); + session_start(); + } + } + + /** + * Deletes an association. + * If you want to use php sessions in your provider code, you have to replace it. + * @param String $handle Association handle. + */ + protected function delAssoc($handle) + { + $oldSession = session_id(); + session_commit(); + session_id($handle); + session_start(); + session_destroy(); + if($oldSession) { + session_id($oldSession); + session_start(); + } + } + + # ------------------------------------------------------------------------ # + # Functions that you might want to implement. + + /** + * Redirects the user to an url. + * @param String $location The url that the user will be redirected to. + */ + protected function redirect($location) + { + header('Location: ' . $location); + die(); + } + + /** + * Generates a new association handle. + * @return string + */ + protected function assoc_handle() + { + return sha1(microtime()); + } + + /** + * Generates a random shared secret. + * @return string + */ + protected function shared_secret($hash) + { + $length = 20; + if($hash == 'sha256') { + $length = 256; + } + + $secret = ''; + for($i = 0; $i < $length; $i++) { + $secret .= mt_rand(0,255); + } + + return $secret; + } + + /** + * Generates a private key. + * @param int $length Length of the key. + */ + protected function keygen($length) + { + $key = ''; + for($i = 1; $i < $length; $i++) { + $key .= mt_rand(0,9); + } + $key .= mt_rand(1,9); + + return $key; + } + + # ------------------------------------------------------------------------ # + # Functions that you probably shouldn't touch. + + function __construct() + { + $this->default_modulus = + 'ANz5OguIOXLsDhmYmsWizjEOHTdxfo2Vcbt2I3MYZuYe91ouJ4mLBX+YkcLiemOcPy' + . 'm2CBRYHNOyyjmG0mg3BVd9RcLn5S3IHHoXGHblzqdLFEi/368Ygo79JRnxTkXjgmY0' + . 'rxlJ5bU1zIKaSDuKdiI+XUkKJX8Fvf8W8vsixYOr'; + + $location = (!empty($_SERVER['HTTPS']) ? 'https' : 'http') . '://' + . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; + $location = preg_replace('/\?.*/','',$location); + $this->serverLocation = $location; + $location .= (strpos($location, '?') ? '&' : '?') . 'xrds'; + $this->xrdsLocation = $location; + + $this->data = $_GET + $_POST; + + # We choose GMP if avaiable, and bcmath otherwise + if(function_exists('gmp_add')) { + $this->add = 'gmp_add'; + $this->mul = 'gmp_mul'; + $this->pow = 'gmp_pow'; + $this->mod = 'gmp_mod'; + $this->div = 'gmp_div'; + $this->powmod = 'gmp_powm'; + } elseif(function_exists('bcadd')) { + $this->add = 'bcadd'; + $this->mul = 'bcmul'; + $this->pow = 'bcpow'; + $this->mod = 'bcmod'; + $this->div = 'bcdiv'; + $this->powmod = 'bcpowmod'; + } else { + # If neither are avaiable, we can't use DH + $this->dh = false; + } + + # However, we do require the hash functions. + # They should be built-in anyway. + if(!function_exists('hash_algos')) { + $this->dh = false; + } + } + + /** + * Displays an XRDS document, or redirects to it. + * By default, it detects whether it should display or redirect automatically. + * @param bool|null $force When true, always display the document, when false always redirect. + */ + function xrds($force=null) + { + if($force) { + echo $this->xrdsContent(); + die(); + } elseif($force === false) { + header('X-XRDS-Location: '. $this->xrdsLocation); + return; + } + + if (isset($_GET['xrds']) + || (isset($_SERVER['HTTP_ACCEPT']) && strpos($_SERVER['HTTP_ACCEPT'], 'application/xrds+xml') !== false) + ) { + header('Content-Type: application/xrds+xml'); + echo $this->xrdsContent(); + die(); + } + + header('X-XRDS-Location: ' . $this->xrdsLocation); + } + + /** + * Returns the content of the XRDS document + * @return String The XRDS document. + */ + protected function xrdsContent() + { + $lines = array( + '<?xml version="1.0" encoding="UTF-8"?>', + '<xrds:XRDS xmlns:xrds="xri://$xrds" xmlns="xri://$xrd*($v*2.0)">', + '<XRD>', + ' <Service>', + ' <Type>' . $this->ns . '/' . ($this->select_id ? 'server' : 'signon') .'</Type>', + ' <URI>' . $this->serverLocation . '</URI>', + ' </Service>', + '</XRD>', + '</xrds:XRDS>' + ); + return implode("\n", $lines); + } + + /** + * Does everything that a provider has to -- in one function. + */ + function server() + { + if(isset($this->data['openid_assoc_handle'])) { + $this->assoc = $this->getAssoc($this->data['openid_assoc_handle']); + if(isset($this->assoc['data'])) { + # We have additional data stored for setup. + $this->data += $this->assoc['data']; + unset($this->assoc['data']); + } + } + + if (isset($this->data['openid_ns']) + && $this->data['openid_ns'] == $this->ns + ) { + if(!isset($this->data['openid_mode'])) $this->errorResponse(); + + switch($this->data['openid_mode']) + { + case 'checkid_immediate': + case 'checkid_setup': + $this->checkRealm(); + # We support AX xor SREG. + $attributes = $this->ax(); + if(!$attributes) { + $attributes = $this->sreg(); + } + + # Even if some user is authenticated, we need to know if it's + # the same one that want's to authenticate. + # Of course, if we use select_id, we accept any user. + if (($identity = $this->checkid($this->data['openid_realm'], $attrValues)) + && ($this->select_id || $identity == $this->data['openid_identity']) + ) { + $this->positiveResponse($identity, $attrValues); + } elseif($this->data['openid_mode'] == 'checkid_immediate') { + $this->redirect($this->response(array('openid.mode' => 'setup_needed'))); + } else { + if(!$this->assoc) { + $this->generateAssociation(); + $this->assoc['private'] = true; + } + $this->assoc['data'] = $this->data; + $this->setAssoc($this->assoc['handle'], $this->assoc); + $this->setup($this->data['openid_identity'], + $this->data['openid_realm'], + $this->assoc['handle'], + $attributes); + } + break; + case 'associate': + $this->associate(); + break; + case 'check_authentication': + $this->checkRealm(); + if($this->verify()) { + echo "ns:$this->ns\nis_valid:true"; + if(strpos($this->data['openid_signed'],'invalidate_handle') !== false) { + echo "\ninvalidate_handle:" . $this->data['openid_invalidate_handle']; + } + } else { + echo "ns:$this->ns\nis_valid:false"; + } + die(); + break; + default: + $this->errorResponse(); + } + } else { + $this->xrds(); + } + } + + protected function checkRealm() + { + if (!isset($this->data['openid_return_to'], $this->data['openid_realm'])) { + $this->errorResponse(); + } + + $realm = str_replace('\*', '[^/]', preg_quote($this->data['openid_realm'])); + if(!preg_match("#^$realm#", $this->data['openid_return_to'])) { + $this->errorResponse(); + } + } + + protected function ax() + { + # Namespace prefix that the fields must have. + $ns = 'http://axschema.org/'; + + # First, we must find out what alias is used for AX. + # Let's check the most likely one + $alias = null; + if (isset($this->data['openid_ns_ax']) + && $this->data['openid_ns_ax'] == 'http://openid.net/srv/ax/1.0' + ) { + $alias = 'ax'; + } else { + foreach($this->data as $name => $value) { + if ($value == 'http://openid.net/srv/ax/1.0' + && preg_match('/openid_ns_(.+)/', $name, $m) + ) { + $alias = $m[1]; + break; + } + } + } + + if(!$alias) { + return null; + } + + $fields = array(); + # Now, we must search again, this time for field aliases + foreach($this->data as $name => $value) { + if (strpos($name, 'openid_' . $alias . '_type') === false + || strpos($value, $ns) === false) { + continue; + } + + $name = substr($name, strlen('openid_' . $alias . '_type_')); + $value = substr($value, strlen($ns)); + + $fields[$name] = $value; + } + + # Then, we find out what fields are required and optional + $required = array(); + $if_available = array(); + foreach(array('required','if_available') as $type) { + if(empty($this->data["openid_{$alias}_{$type}"])) { + continue; + } + $attributes = explode(',', $this->data["openid_{$alias}_{$type}"]); + foreach($attributes as $attr) { + if(empty($fields[$attr])) { + # There is an undefined field here, so we ignore it. + continue; + } + + ${$type}[] = $fields[$attr]; + } + } + + $this->data['ax'] = true; + return array('required' => $required, 'optional' => $if_available); + } + + protected function sreg() + { + $sreg_to_ax = array_flip($this->ax_to_sreg); + + $attributes = array('required' => array(), 'optional' => array()); + + if (empty($this->data['openid_sreg_required']) + && empty($this->data['openid_sreg_optional']) + ) { + return $attributes; + } + + foreach(array('required', 'optional') as $type) { + foreach(explode(',',$this->data['openid_sreg_' . $type]) as $attr) { + if(empty($sreg_to_ax[$attr])) { + # Undefined attribute in SREG request. + # Shouldn't happen, but we check anyway. + continue; + } + + $attributes[$type][] = $sreg_to_ax[$attr]; + } + } + + return $attributes; + } + + /** + * Aids an RP in assertion verification. + * @return bool Information whether the verification suceeded. + */ + protected function verify() + { + # Firstly, we need to make sure that there's an association. + # Otherwise the verification will fail, + # because we've signed assoc_handle in the assertion + if(empty($this->assoc)) { + return false; + } + + # Next, we check that it's a private association, + # i.e. one made without RP input. + # Otherwise, the RP shouldn't ask us to verify. + if(empty($this->assoc['private'])) { + return false; + } + + # Now we have to check if the nonce is correct, to prevent replay attacks. + if($this->data['openid_response_nonce'] != $this->assoc['nonce']) { + return false; + } + + # Getting the signed fields for signature. + $sig = array(); + $signed = explode(',', $this->data['openid_signed']); + foreach($signed as $field) { + $name = strtr($field, '.', '_'); + if(!isset($this->data['openid_' . $name])) { + return false; + } + + $sig[$field] = $this->data['openid_' . $name]; + } + + # Computing the signature and checking if it matches. + $sig = $this->keyValueForm($sig); + if ($this->data['openid_sig'] != + base64_encode(hash_hmac($this->assoc['hash'], $sig, $this->assoc['mac'], true)) + ) { + return false; + } + + # Clearing the nonce, so that it won't be used again. + $this->assoc['nonce'] = null; + + if(empty($this->assoc['private'])) { + # Commiting changes to the association. + $this->setAssoc($this->assoc['handle'], $this->assoc); + } else { + # Private associations shouldn't be used again, se we can as well delete them. + $this->delAssoc($this->assoc['handle']); + } + + # Nothing has failed, so the verification was a success. + return true; + } + + /** + * Performs association with an RP. + */ + protected function associate() + { + # Rejecting no-encryption without TLS. + if(empty($_SERVER['HTTPS']) && $this->data['openid_session_type'] == 'no-encryption') { + $this->directErrorResponse(); + } + + # Checking whether we support DH at all. + if (!$this->dh && substr($this->data['openid_session_type'], 0, 2) == 'DH') { + $this->redirect($this->response(array( + 'openid.error' => 'DH not supported', + 'openid.error_code' => 'unsupported-type', + 'openid.session_type' => 'no-encryption' + ))); + } + + # Creating the association + $this->assoc = array(); + $this->assoc['hash'] = $this->data['openid_assoc_type'] == 'HMAC-SHA256' ? 'sha256' : 'sha1'; + $this->assoc['handle'] = $this->assoc_handle(); + + # Getting the shared secret + if($this->data['openid_session_type'] == 'no-encryption') { + $this->assoc['mac'] = base64_encode($this->shared_secret($this->assoc['hash'])); + } else { + $this->dh(); + } + + # Preparing the direct response... + $response = array( + 'ns' => $this->ns, + 'assoc_handle' => $this->assoc['handle'], + 'assoc_type' => $this->data['openid_assoc_type'], + 'session_type' => $this->data['openid_session_type'], + 'expires_in' => $this->assoc_lifetime + ); + + if(isset($this->assoc['dh_server_public'])) { + $response['dh_server_public'] = $this->assoc['dh_server_public']; + $response['enc_mac_key'] = $this->assoc['mac']; + } else { + $response['mac_key'] = $this->assoc['mac']; + } + + # ...and sending it. + echo $this->keyValueForm($response); + die(); + } + + /** + * Creates a private association. + */ + protected function generateAssociation() + { + $this->assoc = array(); + # We use sha1 by default. + $this->assoc['hash'] = 'sha1'; + $this->assoc['mac'] = $this->shared_secret('sha1'); + $this->assoc['handle'] = $this->assoc_handle(); + } + + /** + * Encrypts the MAC key using DH key exchange. + */ + protected function dh() + { + if(empty($this->data['openid_dh_modulus'])) { + $this->data['openid_dh_modulus'] = $this->default_modulus; + } + + if(empty($this->data['openid_dh_gen'])) { + $this->data['openid_dh_gen'] = $this->default_gen; + } + + if(empty($this->data['openid_dh_consumer_public'])) { + $this->directErrorResponse(); + } + + $modulus = $this->b64dec($this->data['openid_dh_modulus']); + $gen = $this->b64dec($this->data['openid_dh_gen']); + $consumerKey = $this->b64dec($this->data['openid_dh_consumer_public']); + + $privateKey = $this->keygen(strlen($modulus)); + $publicKey = $this->powmod($gen, $privateKey, $modulus); + $ss = $this->powmod($consumerKey, $privateKey, $modulus); + + $mac = $this->x_or(hash($this->assoc['hash'], $ss, true), $this->shared_secret($this->assoc['hash'])); + $this->assoc['dh_server_public'] = $this->decb64($publicKey); + $this->assoc['mac'] = base64_encode($mac); + } + + /** + * XORs two strings. + * @param String $a + * @param String $b + * @return String $a ^ $b + */ + protected function x_or($a, $b) + { + $length = strlen($a); + for($i = 0; $i < $length; $i++) { + $a[$i] = $a[$i] ^ $b[$i]; + } + + return $a; + } + + /** + * Prepares an indirect response url. + * @param array $params Parameters to be sent. + */ + protected function response($params) + { + $params += array('openid.ns' => $this->ns); + return $this->data['openid_return_to'] + . (strpos($this->data['openid_return_to'],'?') ? '&' : '?') + . http_build_query($params, '', '&'); + } + + /** + * Outputs a direct error. + */ + protected function errorResponse() + { + if(!empty($this->data['openid_return_to'])) { + $response = array( + 'openid.mode' => 'error', + 'openid.error' => 'Invalid request' + ); + $this->redirect($this->response($response)); + } else { + header('HTTP/1.1 400 Bad Request'); + $response = array( + 'ns' => $this->ns, + 'error' => 'Invalid request' + ); + echo $this->keyValueForm($response); + } + die(); + } + + /** + * Sends an positive assertion. + * @param String $identity the OP-Local Identifier that is being authenticated. + * @param Array $attributes User attributes to be sent. + */ + protected function positiveResponse($identity, $attributes) + { + # We generate a private association if there is none established. + if(!$this->assoc) { + $this->generateAssociation(); + $this->assoc['private'] = true; + } + + # We set openid.identity (and openid.claimed_id if necessary) to our $identity + if($this->data['openid_identity'] == $this->data['openid_claimed_id'] || $this->select_id) { + $this->data['openid_claimed_id'] = $identity; + } + $this->data['openid_identity'] = $identity; + + # Preparing fields to be signed + $params = array( + 'op_endpoint' => $this->serverLocation, + 'claimed_id' => $this->data['openid_claimed_id'], + 'identity' => $this->data['openid_identity'], + 'return_to' => $this->data['openid_return_to'], + 'realm' => $this->data['openid_realm'], + 'response_nonce' => gmdate("Y-m-d\TH:i:s\Z"), + 'assoc_handle' => $this->assoc['handle'], + ); + + $params += $this->responseAttributes($attributes); + + # Has the RP used an invalid association handle? + if (isset($this->data['openid_assoc_handle']) + && $this->data['openid_assoc_handle'] != $this->assoc['handle'] + ) { + $params['invalidate_handle'] = $this->data['openid_assoc_handle']; + } + + # Signing the $params + $sig = hash_hmac($this->assoc['hash'], $this->keyValueForm($params), $this->assoc['mac'], true); + $req = array( + 'openid.mode' => 'id_res', + 'openid.signed' => implode(',', array_keys($params)), + 'openid.sig' => base64_encode($sig), + ); + + # Saving the nonce and commiting the association. + $this->assoc['nonce'] = $params['response_nonce']; + $this->setAssoc($this->assoc['handle'], $this->assoc); + + # Preparing and sending the response itself + foreach($params as $name => $value) { + $req['openid.' . $name] = $value; + } + + $this->redirect($this->response($req)); + } + + /** + * Prepares an array of attributes to send + */ + protected function responseAttributes($attributes) + { + if(!$attributes) return array(); + + $ns = 'http://axschema.org/'; + + $response = array(); + if(isset($this->data['ax'])) { + $response['ns.ax'] = 'http://openid.net/srv/ax/1.0'; + foreach($attributes as $name => $value) { + $alias = strtr($name, '/', '_'); + $response['ax.type.' . $alias] = $ns . $name; + $response['ax.value.' . $alias] = $value; + } + return $response; + } + + foreach($attributes as $name => $value) { + if(!isset($this->ax_to_sreg[$name])) { + continue; + } + + $response['sreg.' . $this->ax_to_sreg[$name]] = $value; + } + return $response; + } + + /** + * Encodes fields in key-value form. + * @param Array $params Fields to be encoded. + * @return String $params in key-value form. + */ + protected function keyValueForm($params) + { + $str = ''; + foreach($params as $name => $value) { + $str .= "$name:$value\n"; + } + + return $str; + } + + /** + * Responds with an information that the user has canceled authentication. + */ + protected function cancel() + { + $this->redirect($this->response(array('openid.mode' => 'cancel'))); + } + + /** + * Converts base64 encoded number to it's decimal representation. + * @param String $str base64 encoded number. + * @return String Decimal representation of that number. + */ + protected function b64dec($str) + { + $bytes = unpack('C*', base64_decode($str)); + $n = 0; + foreach($bytes as $byte) { + $n = $this->add($this->mul($n, 256), $byte); + } + + return $n; + } + + /** + * Complements b64dec. + */ + protected function decb64($num) + { + $bytes = array(); + while($num) { + array_unshift($bytes, $this->mod($num, 256)); + $num = $this->div($num, 256); + } + + if($bytes && $bytes[0] > 127) { + array_unshift($bytes,0); + } + + array_unshift($bytes, 'C*'); + + return base64_encode(call_user_func_array('pack', $bytes)); + } + + function __call($name, $args) + { + switch($name) { + case 'add': + case 'mul': + case 'pow': + case 'mod': + case 'div': + case 'powmod': + if(function_exists('gmp_strval')) { + return gmp_strval(call_user_func_array($this->$name, $args)); + } + return call_user_func_array($this->$name, $args); + default: + throw new BadMethodCallException(); + } + } +} |