From 82cb034a27f6f141f8c7235e78b4d2573f9cbb5a Mon Sep 17 00:00:00 2001
From: Jacek Kowalski <Jacek@jacekk.info>
Date: Mon, 16 Mar 2020 20:52:03 +0000
Subject: [PATCH] Reformat LICENSE file so it is recognized by GitHub

---
 uphpCAS.php |   86 +++++++++++++++++++++++++++++++++----------
 1 files changed, 66 insertions(+), 20 deletions(-)

diff --git a/uphpCAS.php b/uphpCAS.php
index 5ded1ea..1633119 100644
--- a/uphpCAS.php
+++ b/uphpCAS.php
@@ -14,6 +14,8 @@
 	protected $serverUrl = '';
 	protected $serviceUrl;
 	protected $sessionName = 'uphpCAS-user';
+	protected $method = 'POST';
+	protected $caFile = NULL;
 	
 	function __construct($serverUrl = NULL, $serviceUrl = NULL, $sessionName = NULL) {
 		if($serverUrl != NULL) {
@@ -28,6 +30,10 @@
 		
 		if($sessionName) {
 			$this->sessionName = $sessionName;
+		}
+		
+		if(version_compare(PHP_VERSION, '5.6', '<')) {
+			$this->caFile = $this->findCaFile();
 		}
 	}
 	
@@ -50,7 +56,18 @@
 		if($port != 0) {
 			$url .= ':'.$port;
 		}
+		
 		$url .= $_SERVER['REQUEST_URI'];
+		
+		if(isset($_GET['ticket'])) {
+			$pos = max(
+				strrpos($url, '?ticket='),
+				strrpos($url, '&ticket=')
+			);
+			$url = substr($url, 0, $pos);
+		}
+		
+		return $url;
 	}
 	
 	public function getServerUrl() {
@@ -74,18 +91,45 @@
 		$this->sessionName = $sessionName;
 	}
 	
+	public function getMethod() {
+		return $this->method;
+	}
+	public function setMethod($method) {
+		if($method != 'GET' && $method != 'POST') {
+			throw new DomainException('Unsupported CAS response'
+				.' method: '.$method);
+		}
+		$this->method = $method;
+	}
+	
+	public function getCaFile() {
+		return $this->caFile;
+	}
+	public function setCaFile($caFile) {
+		if(!is_file($caFile)) {
+			throw new DomainException('Invalid CA file: '.$caFile);
+		}
+		$this->caFile = $caFile;
+	}
+	
 	public function loginUrl() {
-		return $this->serverUrl.'/login?method=POST&service='.urlencode($this->serviceUrl);
+		return $this->serverUrl.'/login?method='.$this->method
+			.'&service='.urlencode($this->serviceUrl);
 	}
 	
 	public function logoutUrl($returnUrl = NULL) {
-		return $this->serverUrl.'/logout'.($returnUrl ? '?service='.urlencode($returnUrl) : '');
+		return $this->serverUrl.'/logout'
+			.($returnUrl ? '?service='.urlencode($returnUrl) : '');
+	}
+	
+	public function logoutLocal() {
+		@session_start();
+		unset($_SESSION[$this->sessionName]);
 	}
 	
 	public function logout($returnUrl = NULL) {
-		session_start();
+		$this->logoutLocal();
 		if($this->isAuthenticated()) {
-			unset($_SESSION[$this->sessionName]);
 			header('Location: '.$this->logoutUrl($returnUrl));
 			die();
 		} elseif($returnUrl) {
@@ -99,11 +143,12 @@
 	}
 	
 	public function authenticate() {
-		session_start();
+		@session_start();
 		if($this->isAuthenticated()) {
 			return $_SESSION[$this->sessionName];
 		} elseif(isset($_REQUEST['ticket'])) {
 			$user = $this->verifyTicket($_REQUEST['ticket']);
+			session_regenerate_id();
 			$_SESSION[$this->sessionName] = $user;
 			return $user;
 		} else {
@@ -131,7 +176,7 @@
 	}
 	
 	protected function createStreamContext($hostname) {
-		$context = stream_context_create(array(
+		$context = array(
 			'http' => array(
 				'method' => 'GET',
 				'user_agent' => 'uphpCAS/'.self::VERSION,
@@ -144,20 +189,19 @@
 				'allow_self_signed' => FALSE,
 				'disable_compression' => TRUE,
 			),
-		));
+		);
 		
-		if(version_compare(PHP_VERSION, '5.6', '<')) {
-			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' => $hostname,
-				),
-			));
+		if($this->caFile) {
+			$context['ssl']['cafile'] = $this->caFile;
 		}
 		
-		return $context;
+		if(version_compare(PHP_VERSION, '5.6', '<')) {
+			$context['ssl']['ciphers'] = 'ECDH:DH:AES:CAMELLIA:!SSLv2:!aNULL'
+				.':!eNULL:!EXPORT:!DES:!3DES:!MD5:!RC4:!ADH:!PSK:!SRP';
+			$context['ssl']['CN_match'] = $hostname;
+		}
+		
+		return stream_context_create($context);
 	}
 	
 	public function verifyTicket($ticket) {
@@ -189,13 +233,15 @@
 				}
 			}
 		} catch(Exception $e) {
-			throw new JasigException('Authentication error: CAS server'
-					.' response invalid - parse error', 0, $e);
-		} finally {
 			libxml_clear_errors();
 			libxml_disable_entity_loader($xmlEntityLoader);
 			libxml_use_internal_errors($xmlInternalErrors);
+			throw new JasigException('Authentication error: CAS server'
+					.' response invalid - parse error', 0, $e);
 		}
+		libxml_clear_errors();
+		libxml_disable_entity_loader($xmlEntityLoader);
+		libxml_use_internal_errors($xmlInternalErrors);
 		
 		$failure = $xml->getElementsByTagName('authenticationFailure');
 		$success = $xml->getElementsByTagName('authenticationSuccess');

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