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249 lines
6.7 KiB
249 lines
6.7 KiB
4 years ago
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<?php
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/*
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Copyright (c) 2009-2019 F3::Factory/Bong Cosca, All rights reserved.
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This file is part of the Fat-Free Framework (http://fatfreeframework.com).
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This is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or later.
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Fat-Free Framework is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with Fat-Free Framework. If not, see <http://www.gnu.org/licenses/>.
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*/
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namespace Web;
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//! OpenID consumer
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class OpenID extends \Magic {
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protected
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//! OpenID provider endpoint URL
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$url,
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//! HTTP request parameters
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$args=[];
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/**
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* Determine OpenID provider
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* @return string|FALSE
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* @param $proxy string
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**/
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protected function discover($proxy) {
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// Normalize
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if (!preg_match('/https?:\/\//i',$this->args['endpoint']))
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$this->args['endpoint']='http://'.$this->args['endpoint'];
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$url=parse_url($this->args['endpoint']);
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// Remove fragment; reconnect parts
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$this->args['endpoint']=$url['scheme'].'://'.
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(isset($url['user'])?
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($url['user'].
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(isset($url['pass'])?(':'.$url['pass']):'').'@'):'').
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strtolower($url['host']).(isset($url['path'])?$url['path']:'/').
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(isset($url['query'])?('?'.$url['query']):'');
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// HTML-based discovery of OpenID provider
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$req=\Web::instance()->
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request($this->args['endpoint'],['proxy'=>$proxy]);
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if (!$req)
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return FALSE;
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$type=array_values(preg_grep('/Content-Type:/',$req['headers']));
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if ($type &&
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preg_match('/application\/xrds\+xml|text\/xml/',$type[0]) &&
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($sxml=simplexml_load_string($req['body'])) &&
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($xrds=json_decode(json_encode($sxml),TRUE)) &&
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isset($xrds['XRD'])) {
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// XRDS document
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$svc=$xrds['XRD']['Service'];
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if (isset($svc[0]))
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$svc=$svc[0];
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$svc_type=is_array($svc['Type'])?$svc['Type']:array($svc['Type']);
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if (preg_grep('/http:\/\/specs\.openid\.net\/auth\/2.0\/'.
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'(?:server|signon)/',$svc_type)) {
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$this->args['provider']=$svc['URI'];
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if (isset($svc['LocalID']))
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$this->args['localidentity']=$svc['LocalID'];
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elseif (isset($svc['CanonicalID']))
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$this->args['localidentity']=$svc['CanonicalID'];
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}
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$this->args['server']=$svc['URI'];
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if (isset($svc['Delegate']))
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$this->args['delegate']=$svc['Delegate'];
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}
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else {
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$len=strlen($req['body']);
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$ptr=0;
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// Parse document
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while ($ptr<$len)
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if (preg_match(
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'/^<link\b((?:\h+\w+\h*=\h*'.
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'(?:"(?:.+?)"|\'(?:.+?)\'))*)\h*\/?>/is',
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substr($req['body'],$ptr),$parts)) {
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if ($parts[1] &&
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// Process attributes
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preg_match_all('/\b(rel|href)\h*=\h*'.
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'(?:"(.+?)"|\'(.+?)\')/s',$parts[1],$attr,
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PREG_SET_ORDER)) {
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$node=[];
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foreach ($attr as $kv)
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$node[$kv[1]]=isset($kv[2])?$kv[2]:$kv[3];
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if (isset($node['rel']) &&
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preg_match('/openid2?\.(\w+)/',
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$node['rel'],$var) &&
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isset($node['href']))
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$this->args[$var[1]]=$node['href'];
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}
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$ptr+=strlen($parts[0]);
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}
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else
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$ptr++;
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}
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// Get OpenID provider's endpoint URL
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if (isset($this->args['provider'])) {
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// OpenID 2.0
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$this->args['ns']='http://specs.openid.net/auth/2.0';
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if (isset($this->args['localidentity']))
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$this->args['identity']=$this->args['localidentity'];
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if (isset($this->args['trust_root']))
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$this->args['realm']=$this->args['trust_root'];
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}
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elseif (isset($this->args['server'])) {
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// OpenID 1.1
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$this->args['ns']='http://openid.net/signon/1.1';
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if (isset($this->args['delegate']))
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$this->args['identity']=$this->args['delegate'];
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}
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if (isset($this->args['provider'])) {
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// OpenID 2.0
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if (empty($this->args['claimed_id']))
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$this->args['claimed_id']=$this->args['identity'];
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return $this->args['provider'];
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}
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elseif (isset($this->args['server']))
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// OpenID 1.1
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return $this->args['server'];
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else
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return FALSE;
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}
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/**
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* Initiate OpenID authentication sequence; Return FALSE on failure
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* or redirect to OpenID provider URL
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* @return bool
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* @param $proxy string
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* @param $attr array
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* @param $reqd string|array
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**/
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function auth($proxy=NULL,$attr=[],array $reqd=NULL) {
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$fw=\Base::instance();
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$root=$fw->SCHEME.'://'.$fw->HOST;
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if (empty($this->args['trust_root']))
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$this->args['trust_root']=$root.$fw->BASE.'/';
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if (empty($this->args['return_to']))
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$this->args['return_to']=$root.$_SERVER['REQUEST_URI'];
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$this->args['mode']='checkid_setup';
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if ($this->url=$this->discover($proxy)) {
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if ($attr) {
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$this->args['ns.ax']='http://openid.net/srv/ax/1.0';
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$this->args['ax.mode']='fetch_request';
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foreach ($attr as $key=>$val)
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$this->args['ax.type.'.$key]=$val;
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$this->args['ax.required']=is_string($reqd)?
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$reqd:implode(',',$reqd);
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}
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$var=[];
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foreach ($this->args as $key=>$val)
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$var['openid.'.$key]=$val;
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$fw->reroute($this->url.'?'.http_build_query($var));
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}
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return FALSE;
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}
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/**
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* Return TRUE if OpenID verification was successful
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* @return bool
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* @param $proxy string
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**/
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function verified($proxy=NULL) {
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preg_match_all('/(?<=^|&)openid\.([^=]+)=([^&]+)/',
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$_SERVER['QUERY_STRING'],$matches,PREG_SET_ORDER);
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foreach ($matches as $match)
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$this->args[$match[1]]=urldecode($match[2]);
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if (isset($this->args['mode']) &&
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$this->args['mode']!='error' &&
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$this->url=$this->discover($proxy)) {
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$this->args['mode']='check_authentication';
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$var=[];
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foreach ($this->args as $key=>$val)
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$var['openid.'.$key]=$val;
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$req=\Web::instance()->request(
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$this->url,
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[
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'method'=>'POST',
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'content'=>http_build_query($var),
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'proxy'=>$proxy
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]
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);
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return (bool)preg_match('/is_valid:true/i',$req['body']);
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}
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return FALSE;
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}
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/**
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* Return OpenID response fields
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* @return array
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**/
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function response() {
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return $this->args;
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}
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/**
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* Return TRUE if OpenID request parameter exists
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* @return bool
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* @param $key string
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**/
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function exists($key) {
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return isset($this->args[$key]);
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}
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/**
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* Bind value to OpenID request parameter
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* @return string
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* @param $key string
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* @param $val string
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**/
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function set($key,$val) {
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return $this->args[$key]=$val;
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}
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/**
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* Return value of OpenID request parameter
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* @return mixed
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* @param $key string
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**/
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function &get($key) {
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if (isset($this->args[$key]))
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$val=&$this->args[$key];
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else
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$val=NULL;
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return $val;
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}
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/**
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* Remove OpenID request parameter
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* @return NULL
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* @param $key
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**/
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function clear($key) {
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unset($this->args[$key]);
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}
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}
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