uphpCAS.php

@@ -13,8 +13,9 @@
   const VERSION = '1.0';
   protected $serverUrl = '';
   protected $serviceUrl;
   protected $sessionName = 'uphpCAS-user';
   
   function __construct($serverUrl = NULL, $serviceUrl = NULL) {
   function __construct($serverUrl = NULL, $serviceUrl = NULL, $sessionName = NULL) {
      if($serverUrl != NULL) {
         $this->serverUrl = rtrim($serverUrl, '/');
      }
@@ -22,28 +23,34 @@
      if($serviceUrl != NULL) {
         $this->serviceUrl = $serviceUrl;
      } else {
         $url = 'http://';
         $port = 0;
         if(isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on') {
            $url = 'https://';
            if(isset($_SERVER['SERVER_PORT'])
                  && $_SERVER['SERVER_PORT'] != '443') {
               $port = $_SERVER['SERVER_PORT'];
            }
         } elseif(isset($_SERVER['SERVER_PORT'])
               && $_SERVER['SERVER_PORT'] != '80') {
         $this->serviceUrl = $this->getCurrentUrl();
      }
		
      if($sessionName) {
         $this->sessionName = $sessionName;
      }
   }
	
   public function getCurrentUrl() {
      $url = 'http://';
      $port = 0;
      if(isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on') {
         $url = 'https://';
         if(isset($_SERVER['SERVER_PORT'])
               && $_SERVER['SERVER_PORT'] != '443') {
            $port = $_SERVER['SERVER_PORT'];
         }
			
         $url .= $_SERVER['SERVER_NAME'];
			
         if($port != 0) {
            $url .= ':'.$port;
         }
         $url .= $_SERVER['REQUEST_URI'];
			
         $this->serviceUrl = $url;
      } elseif(isset($_SERVER['SERVER_PORT'])
            && $_SERVER['SERVER_PORT'] != '80') {
         $port = $_SERVER['SERVER_PORT'];
      }
		
      $url .= $_SERVER['SERVER_NAME'];
		
      if($port != 0) {
         $url .= ':'.$port;
      }
      $url .= $_SERVER['REQUEST_URI'];
   }
   
   public function getServerUrl() {
@@ -60,6 +67,13 @@
      $this->serviceUrl = $serviceUrl;
   }
   
   public function getSessionName() {
      return $this->sessionName;
   }
   public function setSessionName($sessionName) {
      $this->sessionName = $sessionName;
   }
	
   public function loginUrl() {
      return $this->serverUrl.'/login?method=POST&service='.urlencode($this->serviceUrl);
   }
@@ -68,26 +82,29 @@
      return $this->serverUrl.'/logout'.($returnUrl ? '?service='.urlencode($returnUrl) : '');
   }
   
   public function logout() {
   public function logout($returnUrl = NULL) {
      session_start();
      if(isset($_SESSION['uphpCAS-user'])) {
         unset($_SESSION['uphpCAS-user']);
      if($this->isAuthenticated()) {
         unset($_SESSION[$this->sessionName]);
         header('Location: '.$this->logoutUrl($returnUrl));
         die();
      } elseif($returnUrl) {
         header('Location: '.$returnUrl);
         die();
      }
      header('Location: '.$this->logoutUrl());
      die();
   }
   
   public function isAuthenticated() {
      return isset($_SESSION['uphpCAS-user']);
      return isset($_SESSION[$this->sessionName]);
   }
   
   public function authenticate() {
      session_start();
      if($this->isAuthenticated()) {
         return $_SESSION['uphpCAS-user'];
         return $_SESSION[$this->sessionName];
      } elseif(isset($_REQUEST['ticket'])) {
         $user = $this->verifyTicket($_REQUEST['ticket']);
         $_SESSION['uphpCAS-user'] = $user;
         $_SESSION[$this->sessionName] = $user;
         return $user;
      } else {
         header('Location: '.$this->loginUrl());
@@ -95,8 +112,26 @@
      }
   }
   
   public function verifyTicket($ticket) {
      $context = array(
   protected function findCaFile() {
      $cafiles = array(
         '/etc/ssl/certs/ca-certificates.crt',
         '/etc/ssl/certs/ca-bundle.crt',
         '/etc/pki/tls/certs/ca-bundle.crt',
      );
		
      $cafile = NULL;
      foreach($cafiles as $file) {
         if(is_file($file)) {
            $cafile = $file;
            break;
         }
      }
		
      return $cafile;
   }
	
   protected function createStreamContext($hostname) {
      $context = stream_context_create(array(
         'http' => array(
            'method' => 'GET',
            'user_agent' => 'uphpCAS/'.self::VERSION,
@@ -109,33 +144,29 @@
            'allow_self_signed' => FALSE,
            'disable_compression' => TRUE,
         ),
      );
      ));
      
      if(version_compare(PHP_VERSION, '5.6', '<')) {
         $cafiles = array(
            '/etc/ssl/certs/ca-certificates.crt',
            '/etc/ssl/certs/ca-bundle.crt',
            '/etc/pki/tls/certs/ca-bundle.crt',
         );
         $cafile = NULL;
         foreach($cafiles as $file) {
            if(is_file($file)) {
               $cafile = $file;
               break;
            }
         }
			
         $url = parse_url($this->serverUrl);
         $context['ssl']['cafile'] = $cafile;
         $context['ssl']['ciphers'] = 'ECDH:DH:AES:CAMELLIA:!SSLv2:!aNULL'
               .':!eNULL:!EXPORT:!DES:!3DES:!MD5:!RC4:!ADH:!PSK:!SRP';
         $context['ssl']['CN_match'] = $url['host'];
         stream_context_set_option($context, array(
            'ssl' => array(
               'cafile' => $this->findCaFile(),
               'ciphers' => 'ECDH:DH:AES:CAMELLIA:!SSLv2:!aNULL:!eNULL'
                  .':!EXPORT:!DES:!3DES:!MD5:!RC4:!ADH:!PSK:!SRP',
               'CN_match' => $hostname,
            ),
         ));
      }
		
      return $context;
   }
	
   public function verifyTicket($ticket) {
      $url = parse_url($this->serverUrl);
      $context = $this->createStreamContext($url['host']);
      
      $data = file_get_contents($this->serverUrl
               .'/serviceValidate?service='.urlencode($this->serviceUrl)
               .'&ticket='.urlencode($ticket),
            FALSE, stream_context_create($context));
               .'&ticket='.urlencode($ticket), FALSE, $context);
      if($data === FALSE) {
         throw new JasigException('Authentication error: CAS server is unavailable');
      }