From 7107939d1228f1066cdfc478297127856c2ad49a Mon Sep 17 00:00:00 2001
From: Jacek Kowalski <jkowalsk@student.agh.edu.pl>
Date: Thu, 03 Sep 2015 17:13:09 +0000
Subject: [PATCH] Extract hardcoded session variable name to separate field
---
uphpCAS.php | 129 ++++++++++++++++++++++++++++++------------
1 files changed, 92 insertions(+), 37 deletions(-)
diff --git a/uphpCAS.php b/uphpCAS.php
index bce5aab..bf6ab6a 100644
--- a/uphpCAS.php
+++ b/uphpCAS.php
@@ -1,7 +1,7 @@
<?php
// Thrown when internal error occurs
class JasigException extends Exception {}
-// Thrown when CAS server return authentication error
+// Thrown when CAS server returns authentication error
class JasigAuthException extends JasigException {}
class JasigUser {
@@ -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, '/');
}
@@ -26,10 +27,12 @@
$port = 0;
if(isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on') {
$url = 'https://';
- if(isset($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] != '443') {
+ if(isset($_SERVER['SERVER_PORT'])
+ && $_SERVER['SERVER_PORT'] != '443') {
$port = $_SERVER['SERVER_PORT'];
}
- } elseif(isset($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] != '80') {
+ } elseif(isset($_SERVER['SERVER_PORT'])
+ && $_SERVER['SERVER_PORT'] != '80') {
$port = $_SERVER['SERVER_PORT'];
}
@@ -42,40 +45,64 @@
$this->serviceUrl = $url;
}
+
+ if($sessionName) {
+ $this->sessionName = $sessionName;
+ }
}
+ public function getServerUrl() {
+ return $this->serverUrl;
+ }
public function setServerUrl($serverUrl) {
$this->serverUrl = $serverUrl;
}
+ public function getServiceUrl() {
+ return $this->serviceUrl;
+ }
public function setServiceUrl($serviceUrl) {
$this->serviceUrl = $serviceUrl;
}
+ public function getSessionName($sessionName) {
+ return $this->sessionName;
+ }
+ public function setSessionName($sessionName) {
+ $this->sessionName = $sessionName;
+ }
+
public function loginUrl() {
- return $this->serverUrl.'/login?service='.urlencode($this->serviceUrl);
+ return $this->serverUrl.'/login?method=POST&service='.urlencode($this->serviceUrl);
}
- public function logoutUrl() {
- return $this->serverUrl.'/logout';
+ public function logoutUrl($returnUrl = NULL) {
+ 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($_SESSION[$this->sessionName]);
}
public function authenticate() {
session_start();
- if(isset($_SESSION['uphpCAS-user'])) {
- return $_SESSION['uphpCAS-user'];
- } elseif(isset($_GET['ticket'])) {
- $user = $this->verifyTicket($_GET['ticket']);
- $_SESSION['uphpCAS-user'] = $user;
+ if($this->isAuthenticated()) {
+ return $_SESSION[$this->sessionName];
+ } elseif(isset($_REQUEST['ticket'])) {
+ $user = $this->verifyTicket($_REQUEST['ticket']);
+ $_SESSION[$this->sessionName] = $user;
return $user;
} else {
header('Location: '.$this->loginUrl());
@@ -92,13 +119,37 @@
),
'ssl' => array(
'verify_peer' => TRUE,
- 'allow_self_signed' => FALSE,
+ 'verify_peer_name' => TRUE,
'verify_depth' => 5,
- 'ciphers' => 'HIGH:-MD5:-aNULL:-DES',
+ 'allow_self_signed' => FALSE,
+ 'disable_compression' => TRUE,
),
);
- $data = file_get_contents($this->serverUrl.'/serviceValidate?service='.urlencode($this->serviceUrl).'&ticket='.urlencode($ticket),
+ 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'];
+ }
+
+ $data = file_get_contents($this->serverUrl
+ .'/serviceValidate?service='.urlencode($this->serviceUrl)
+ .'&ticket='.urlencode($ticket),
FALSE, stream_context_create($context));
if($data === FALSE) {
throw new JasigException('Authentication error: CAS server is unavailable');
@@ -111,19 +162,19 @@
$xml->loadXML($data);
foreach(libxml_get_errors() as $error) {
- $e = new ErrorException($error->message, $error->code, 1, $error->file, $error->line);
+ $e = new ErrorException($error->message, $error->code, 1,
+ $error->file, $error->line);
switch ($error->level) {
case LIBXML_ERR_ERROR:
- throw new Exception('Fatal error during XML parsing', 0, $e);
- break;
case LIBXML_ERR_FATAL:
- throw new Exception('Fatal error during XML parsing', 0, $e);
+ throw new Exception('Fatal error during XML parsing',
+ 0, $e);
break;
}
}
- }
- catch(Exception $e) {
- throw new JasigException('Authentication error: CAS server response invalid - parse error', 0, $e);
+ } 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);
@@ -136,23 +187,28 @@
if($failure->length > 0) {
$failure = $failure->item(0);
if(!($failure instanceof DOMElement)) {
- throw new JasigException('Authentication error: CAS server response invalid - authenticationFailure');
+ throw new JasigException('Authentication error: CAS server'
+ .' response invalid - authenticationFailure');
}
- throw new JasigAuthException('Authentication error: '.$failure->textContent);
+ throw new JasigAuthException('Authentication error: '
+ .$failure->textContent);
} elseif($success->length > 0) {
$success = $success->item(0);
if(!($success instanceof DOMElement)) {
- throw new JasigException('Authentication error: CAS server response invalid - authenticationSuccess');
+ throw new JasigException('Authentication error: CAS server'
+ .' response invalid - authenticationSuccess');
}
$user = $success->getElementsByTagName('user');
if($user->length == 0) {
- throw new JasigException('Authentication error: CAS server response invalid - user');
+ throw new JasigException('Authentication error: CAS server'
+ .' response invalid - user');
}
$user = trim($user->item(0)->textContent);
- if(strlen($user)<1) {
- throw new JasigException('Authentication error: CAS server response invalid - user value');
+ if(strlen($user) < 1) {
+ throw new JasigException('Authentication error: CAS server'
+ .' response invalid - user value');
}
$jusr = new JasigUser();
@@ -167,10 +223,9 @@
}
return $jusr;
- }
- else
- {
- throw new JasigException('Authentication error: CAS server response invalid - required tag not found');
+ } else {
+ throw new JasigException('Authentication error: CAS server'
+ .' response invalid - required tag not found');
}
}
}
--
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