3948 lines
136 KiB
PHP
3948 lines
136 KiB
PHP
<?php
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/**
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* Licensed to Jasig under one or more contributor license
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* agreements. See the NOTICE file distributed with this work for
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* additional information regarding copyright ownership.
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*
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* Jasig licenses this file to you under the Apache License,
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* Version 2.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* PHP Version 5
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*
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* @file CAS/Client.php
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* @category Authentication
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* @package PhpCAS
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* @author Pascal Aubry <pascal.aubry@univ-rennes1.fr>
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* @author Olivier Berger <olivier.berger@it-sudparis.eu>
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* @author Brett Bieber <brett.bieber@gmail.com>
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* @author Joachim Fritschi <jfritschi@freenet.de>
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* @author Adam Franco <afranco@middlebury.edu>
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* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
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* @link https://wiki.jasig.org/display/CASC/phpCAS
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*/
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/**
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* The CAS_Client class is a client interface that provides CAS authentication
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* to PHP applications.
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*
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* @class CAS_Client
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* @category Authentication
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* @package PhpCAS
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* @author Pascal Aubry <pascal.aubry@univ-rennes1.fr>
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* @author Olivier Berger <olivier.berger@it-sudparis.eu>
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* @author Brett Bieber <brett.bieber@gmail.com>
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* @author Joachim Fritschi <jfritschi@freenet.de>
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* @author Adam Franco <afranco@middlebury.edu>
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* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
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* @link https://wiki.jasig.org/display/CASC/phpCAS
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*
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*/
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class CAS_Client
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{
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// ########################################################################
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// HTML OUTPUT
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// ########################################################################
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/**
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* @addtogroup internalOutput
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* @{
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*/
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/**
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* This method filters a string by replacing special tokens by appropriate values
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* and prints it. The corresponding tokens are taken into account:
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* - __CAS_VERSION__
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* - __PHPCAS_VERSION__
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* - __SERVER_BASE_URL__
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*
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* Used by CAS_Client::PrintHTMLHeader() and CAS_Client::printHTMLFooter().
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*
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* @param string $str the string to filter and output
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*
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* @return void
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*/
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private function _htmlFilterOutput($str)
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{
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$str = str_replace('__CAS_VERSION__', $this->getServerVersion(), $str);
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$str = str_replace('__PHPCAS_VERSION__', phpCAS::getVersion(), $str);
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$str = str_replace('__SERVER_BASE_URL__', $this->_getServerBaseURL(), $str);
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echo $str;
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}
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/**
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* A string used to print the header of HTML pages. Written by
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* CAS_Client::setHTMLHeader(), read by CAS_Client::printHTMLHeader().
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*
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* @hideinitializer
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* @see CAS_Client::setHTMLHeader, CAS_Client::printHTMLHeader()
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*/
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private $_output_header = '';
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/**
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* This method prints the header of the HTML output (after filtering). If
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* CAS_Client::setHTMLHeader() was not used, a default header is output.
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*
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* @param string $title the title of the page
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*
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* @return void
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* @see _htmlFilterOutput()
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*/
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public function printHTMLHeader($title)
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{
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$this->_htmlFilterOutput(
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str_replace(
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'__TITLE__', $title,
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(empty($this->_output_header)
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? '<html><head><title>__TITLE__</title></head><body><h1>__TITLE__</h1>'
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: $this->_output_header)
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)
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);
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}
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/**
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* A string used to print the footer of HTML pages. Written by
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* CAS_Client::setHTMLFooter(), read by printHTMLFooter().
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*
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* @hideinitializer
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* @see CAS_Client::setHTMLFooter, CAS_Client::printHTMLFooter()
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*/
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private $_output_footer = '';
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/**
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* This method prints the footer of the HTML output (after filtering). If
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* CAS_Client::setHTMLFooter() was not used, a default footer is output.
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*
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* @return void
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* @see _htmlFilterOutput()
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*/
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public function printHTMLFooter()
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{
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$lang = $this->getLangObj();
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$this->_htmlFilterOutput(
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empty($this->_output_footer)?
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(phpCAS::getVerbose())?
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'<hr><address>phpCAS __PHPCAS_VERSION__ '
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.$lang->getUsingServer()
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.' <a href="__SERVER_BASE_URL__">__SERVER_BASE_URL__</a> (CAS __CAS_VERSION__)</a></address></body></html>'
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:'</body></html>'
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:$this->_output_footer
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);
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}
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/**
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* This method set the HTML header used for all outputs.
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*
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* @param string $header the HTML header.
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*
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* @return void
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*/
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public function setHTMLHeader($header)
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{
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// Argument Validation
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if (gettype($header) != 'string')
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throw new CAS_TypeMismatchException($header, '$header', 'string');
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$this->_output_header = $header;
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}
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/**
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* This method set the HTML footer used for all outputs.
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*
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* @param string $footer the HTML footer.
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*
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* @return void
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*/
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public function setHTMLFooter($footer)
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{
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// Argument Validation
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if (gettype($footer) != 'string')
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throw new CAS_TypeMismatchException($footer, '$footer', 'string');
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$this->_output_footer = $footer;
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}
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/** @} */
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// ########################################################################
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// INTERNATIONALIZATION
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// ########################################################################
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/**
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* @addtogroup internalLang
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* @{
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*/
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/**
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* A string corresponding to the language used by phpCAS. Written by
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* CAS_Client::setLang(), read by CAS_Client::getLang().
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* @note debugging information is always in english (debug purposes only).
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*/
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private $_lang = PHPCAS_LANG_DEFAULT;
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/**
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* This method is used to set the language used by phpCAS.
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*
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* @param string $lang representing the language.
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*
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* @return void
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*/
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public function setLang($lang)
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{
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// Argument Validation
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if (gettype($lang) != 'string')
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throw new CAS_TypeMismatchException($lang, '$lang', 'string');
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phpCAS::traceBegin();
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$obj = new $lang();
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if (!($obj instanceof CAS_Languages_LanguageInterface)) {
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throw new CAS_InvalidArgumentException(
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'$className must implement the CAS_Languages_LanguageInterface'
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);
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}
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$this->_lang = $lang;
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phpCAS::traceEnd();
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}
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/**
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* Create the language
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*
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* @return CAS_Languages_LanguageInterface object implementing the class
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*/
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public function getLangObj()
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{
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$classname = $this->_lang;
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return new $classname();
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}
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/** @} */
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// ########################################################################
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// CAS SERVER CONFIG
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// ########################################################################
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/**
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* @addtogroup internalConfig
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* @{
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*/
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/**
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* a record to store information about the CAS server.
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* - $_server['version']: the version of the CAS server
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* - $_server['hostname']: the hostname of the CAS server
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* - $_server['port']: the port the CAS server is running on
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* - $_server['uri']: the base URI the CAS server is responding on
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* - $_server['base_url']: the base URL of the CAS server
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* - $_server['login_url']: the login URL of the CAS server
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* - $_server['service_validate_url']: the service validating URL of the
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* CAS server
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* - $_server['proxy_url']: the proxy URL of the CAS server
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* - $_server['proxy_validate_url']: the proxy validating URL of the CAS server
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* - $_server['logout_url']: the logout URL of the CAS server
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*
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* $_server['version'], $_server['hostname'], $_server['port'] and
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* $_server['uri'] are written by CAS_Client::CAS_Client(), read by
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* CAS_Client::getServerVersion(), CAS_Client::_getServerHostname(),
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* CAS_Client::_getServerPort() and CAS_Client::_getServerURI().
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*
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* The other fields are written and read by CAS_Client::_getServerBaseURL(),
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* CAS_Client::getServerLoginURL(), CAS_Client::getServerServiceValidateURL(),
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* CAS_Client::getServerProxyValidateURL() and CAS_Client::getServerLogoutURL().
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*
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* @hideinitializer
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*/
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private $_server = array(
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'version' => '',
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'hostname' => 'none',
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'port' => -1,
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'uri' => 'none');
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/**
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* This method is used to retrieve the version of the CAS server.
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*
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* @return string the version of the CAS server.
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*/
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public function getServerVersion()
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{
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return $this->_server['version'];
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}
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/**
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* This method is used to retrieve the hostname of the CAS server.
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*
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* @return string the hostname of the CAS server.
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*/
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private function _getServerHostname()
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{
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return $this->_server['hostname'];
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}
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/**
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* This method is used to retrieve the port of the CAS server.
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*
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* @return int the port of the CAS server.
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*/
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private function _getServerPort()
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{
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return $this->_server['port'];
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}
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/**
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* This method is used to retrieve the URI of the CAS server.
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*
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* @return string a URI.
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*/
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private function _getServerURI()
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{
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return $this->_server['uri'];
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}
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/**
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* This method is used to retrieve the base URL of the CAS server.
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*
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* @return string a URL.
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*/
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private function _getServerBaseURL()
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{
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// the URL is build only when needed
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if ( empty($this->_server['base_url']) ) {
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$this->_server['base_url'] = 'https://' . $this->_getServerHostname();
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if ($this->_getServerPort()!=443) {
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$this->_server['base_url'] .= ':'
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.$this->_getServerPort();
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}
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$this->_server['base_url'] .= $this->_getServerURI();
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}
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return $this->_server['base_url'];
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}
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/**
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* This method is used to retrieve the login URL of the CAS server.
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*
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* @param bool $gateway true to check authentication, false to force it
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* @param bool $renew true to force the authentication with the CAS server
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*
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* @return string a URL.
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* @note It is recommended that CAS implementations ignore the "gateway"
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* parameter if "renew" is set
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*/
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public function getServerLoginURL($gateway=false,$renew=false)
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{
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phpCAS::traceBegin();
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// the URL is build only when needed
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if ( empty($this->_server['login_url']) ) {
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$this->_server['login_url'] = $this->_buildQueryUrl($this->_getServerBaseURL().'login','service='.urlencode($this->getURL()));
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}
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$url = $this->_server['login_url'];
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if ($renew) {
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// It is recommended that when the "renew" parameter is set, its
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// value be "true"
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$url = $this->_buildQueryUrl($url, 'renew=true');
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} elseif ($gateway) {
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// It is recommended that when the "gateway" parameter is set, its
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// value be "true"
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$url = $this->_buildQueryUrl($url, 'gateway=true');
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}
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phpCAS::traceEnd($url);
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return $url;
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}
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/**
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* This method sets the login URL of the CAS server.
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*
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* @param string $url the login URL
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*
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* @return string login url
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*/
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public function setServerLoginURL($url)
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{
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// Argument Validation
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if (gettype($url) != 'string')
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throw new CAS_TypeMismatchException($url, '$url', 'string');
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return $this->_server['login_url'] = $url;
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}
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/**
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* This method sets the serviceValidate URL of the CAS server.
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*
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* @param string $url the serviceValidate URL
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*
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* @return string serviceValidate URL
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*/
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public function setServerServiceValidateURL($url)
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{
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// Argument Validation
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if (gettype($url) != 'string')
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throw new CAS_TypeMismatchException($url, '$url', 'string');
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return $this->_server['service_validate_url'] = $url;
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}
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/**
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* This method sets the proxyValidate URL of the CAS server.
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*
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* @param string $url the proxyValidate URL
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*
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* @return string proxyValidate URL
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*/
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public function setServerProxyValidateURL($url)
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{
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// Argument Validation
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if (gettype($url) != 'string')
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throw new CAS_TypeMismatchException($url, '$url', 'string');
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return $this->_server['proxy_validate_url'] = $url;
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}
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/**
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* This method sets the samlValidate URL of the CAS server.
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*
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* @param string $url the samlValidate URL
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*
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* @return string samlValidate URL
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*/
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public function setServerSamlValidateURL($url)
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{
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// Argument Validation
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if (gettype($url) != 'string')
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throw new CAS_TypeMismatchException($url, '$url', 'string');
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return $this->_server['saml_validate_url'] = $url;
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}
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/**
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* This method is used to retrieve the service validating URL of the CAS server.
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*
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* @return string serviceValidate URL.
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*/
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public function getServerServiceValidateURL()
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{
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phpCAS::traceBegin();
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// the URL is build only when needed
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if ( empty($this->_server['service_validate_url']) ) {
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switch ($this->getServerVersion()) {
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case CAS_VERSION_1_0:
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$this->_server['service_validate_url'] = $this->_getServerBaseURL()
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.'validate';
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break;
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case CAS_VERSION_2_0:
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$this->_server['service_validate_url'] = $this->_getServerBaseURL()
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.'serviceValidate';
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break;
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case CAS_VERSION_3_0:
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$this->_server['service_validate_url'] = $this->_getServerBaseURL()
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.'p3/serviceValidate';
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break;
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}
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}
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$url = $this->_buildQueryUrl(
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$this->_server['service_validate_url'],
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'service='.urlencode($this->getURL())
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);
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phpCAS::traceEnd($url);
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return $url;
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}
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/**
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* This method is used to retrieve the SAML validating URL of the CAS server.
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*
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* @return string samlValidate URL.
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*/
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public function getServerSamlValidateURL()
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{
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phpCAS::traceBegin();
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// the URL is build only when needed
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if ( empty($this->_server['saml_validate_url']) ) {
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switch ($this->getServerVersion()) {
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case SAML_VERSION_1_1:
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$this->_server['saml_validate_url'] = $this->_getServerBaseURL().'samlValidate';
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break;
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}
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}
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$url = $this->_buildQueryUrl(
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$this->_server['saml_validate_url'],
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'TARGET='.urlencode($this->getURL())
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);
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phpCAS::traceEnd($url);
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return $url;
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}
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/**
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* This method is used to retrieve the proxy validating URL of the CAS server.
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*
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* @return string proxyValidate URL.
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*/
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public function getServerProxyValidateURL()
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{
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phpCAS::traceBegin();
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// the URL is build only when needed
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if ( empty($this->_server['proxy_validate_url']) ) {
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switch ($this->getServerVersion()) {
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case CAS_VERSION_1_0:
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$this->_server['proxy_validate_url'] = '';
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break;
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case CAS_VERSION_2_0:
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$this->_server['proxy_validate_url'] = $this->_getServerBaseURL().'proxyValidate';
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break;
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case CAS_VERSION_3_0:
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$this->_server['proxy_validate_url'] = $this->_getServerBaseURL().'p3/proxyValidate';
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break;
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}
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}
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$url = $this->_buildQueryUrl(
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$this->_server['proxy_validate_url'],
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'service='.urlencode($this->getURL())
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);
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phpCAS::traceEnd($url);
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return $url;
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}
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/**
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* This method is used to retrieve the proxy URL of the CAS server.
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*
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* @return string proxy URL.
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*/
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public function getServerProxyURL()
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{
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// the URL is build only when needed
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if ( empty($this->_server['proxy_url']) ) {
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switch ($this->getServerVersion()) {
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case CAS_VERSION_1_0:
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$this->_server['proxy_url'] = '';
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break;
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case CAS_VERSION_2_0:
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case CAS_VERSION_3_0:
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$this->_server['proxy_url'] = $this->_getServerBaseURL().'proxy';
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break;
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}
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}
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return $this->_server['proxy_url'];
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}
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|
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/**
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* This method is used to retrieve the logout URL of the CAS server.
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*
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* @return string logout URL.
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*/
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public function getServerLogoutURL()
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{
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// the URL is build only when needed
|
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if ( empty($this->_server['logout_url']) ) {
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$this->_server['logout_url'] = $this->_getServerBaseURL().'logout';
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}
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return $this->_server['logout_url'];
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}
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|
|
/**
|
|
* This method sets the logout URL of the CAS server.
|
|
*
|
|
* @param string $url the logout URL
|
|
*
|
|
* @return string logout url
|
|
*/
|
|
public function setServerLogoutURL($url)
|
|
{
|
|
// Argument Validation
|
|
if (gettype($url) != 'string')
|
|
throw new CAS_TypeMismatchException($url, '$url', 'string');
|
|
|
|
return $this->_server['logout_url'] = $url;
|
|
}
|
|
|
|
/**
|
|
* An array to store extra curl options.
|
|
*/
|
|
private $_curl_options = array();
|
|
|
|
/**
|
|
* This method is used to set additional user curl options.
|
|
*
|
|
* @param string $key name of the curl option
|
|
* @param string $value value of the curl option
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setExtraCurlOption($key, $value)
|
|
{
|
|
$this->_curl_options[$key] = $value;
|
|
}
|
|
|
|
/** @} */
|
|
|
|
// ########################################################################
|
|
// Change the internal behaviour of phpcas
|
|
// ########################################################################
|
|
|
|
/**
|
|
* @addtogroup internalBehave
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* The class to instantiate for making web requests in readUrl().
|
|
* The class specified must implement the CAS_Request_RequestInterface.
|
|
* By default CAS_Request_CurlRequest is used, but this may be overridden to
|
|
* supply alternate request mechanisms for testing.
|
|
*/
|
|
private $_requestImplementation = 'CAS_Request_CurlRequest';
|
|
|
|
/**
|
|
* Override the default implementation used to make web requests in readUrl().
|
|
* This class must implement the CAS_Request_RequestInterface.
|
|
*
|
|
* @param string $className name of the RequestImplementation class
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setRequestImplementation ($className)
|
|
{
|
|
$obj = new $className;
|
|
if (!($obj instanceof CAS_Request_RequestInterface)) {
|
|
throw new CAS_InvalidArgumentException(
|
|
'$className must implement the CAS_Request_RequestInterface'
|
|
);
|
|
}
|
|
$this->_requestImplementation = $className;
|
|
}
|
|
|
|
/**
|
|
* @var boolean $_clearTicketsFromUrl; If true, phpCAS will clear session
|
|
* tickets from the URL after a successful authentication.
|
|
*/
|
|
private $_clearTicketsFromUrl = true;
|
|
|
|
/**
|
|
* Configure the client to not send redirect headers and call exit() on
|
|
* authentication success. The normal redirect is used to remove the service
|
|
* ticket from the client's URL, but for running unit tests we need to
|
|
* continue without exiting.
|
|
*
|
|
* Needed for testing authentication
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setNoClearTicketsFromUrl ()
|
|
{
|
|
$this->_clearTicketsFromUrl = false;
|
|
}
|
|
|
|
/**
|
|
* @var callback $_attributeParserCallbackFunction;
|
|
*/
|
|
private $_casAttributeParserCallbackFunction = null;
|
|
|
|
/**
|
|
* @var array $_attributeParserCallbackArgs;
|
|
*/
|
|
private $_casAttributeParserCallbackArgs = array();
|
|
|
|
/**
|
|
* Set a callback function to be run when parsing CAS attributes
|
|
*
|
|
* The callback function will be passed a XMLNode as its first parameter,
|
|
* followed by any $additionalArgs you pass.
|
|
*
|
|
* @param string $function callback function to call
|
|
* @param array $additionalArgs optional array of arguments
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setCasAttributeParserCallback($function, array $additionalArgs = array())
|
|
{
|
|
$this->_casAttributeParserCallbackFunction = $function;
|
|
$this->_casAttributeParserCallbackArgs = $additionalArgs;
|
|
}
|
|
|
|
/** @var callable $_postAuthenticateCallbackFunction;
|
|
*/
|
|
private $_postAuthenticateCallbackFunction = null;
|
|
|
|
/**
|
|
* @var array $_postAuthenticateCallbackArgs;
|
|
*/
|
|
private $_postAuthenticateCallbackArgs = array();
|
|
|
|
/**
|
|
* Set a callback function to be run when a user authenticates.
|
|
*
|
|
* The callback function will be passed a $logoutTicket as its first parameter,
|
|
* followed by any $additionalArgs you pass. The $logoutTicket parameter is an
|
|
* opaque string that can be used to map a session-id to the logout request
|
|
* in order to support single-signout in applications that manage their own
|
|
* sessions (rather than letting phpCAS start the session).
|
|
*
|
|
* phpCAS::forceAuthentication() will always exit and forward client unless
|
|
* they are already authenticated. To perform an action at the moment the user
|
|
* logs in (such as registering an account, performing logging, etc), register
|
|
* a callback function here.
|
|
*
|
|
* @param callable $function callback function to call
|
|
* @param array $additionalArgs optional array of arguments
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setPostAuthenticateCallback ($function, array $additionalArgs = array())
|
|
{
|
|
$this->_postAuthenticateCallbackFunction = $function;
|
|
$this->_postAuthenticateCallbackArgs = $additionalArgs;
|
|
}
|
|
|
|
/**
|
|
* @var callable $_signoutCallbackFunction;
|
|
*/
|
|
private $_signoutCallbackFunction = null;
|
|
|
|
/**
|
|
* @var array $_signoutCallbackArgs;
|
|
*/
|
|
private $_signoutCallbackArgs = array();
|
|
|
|
/**
|
|
* Set a callback function to be run when a single-signout request is received.
|
|
*
|
|
* The callback function will be passed a $logoutTicket as its first parameter,
|
|
* followed by any $additionalArgs you pass. The $logoutTicket parameter is an
|
|
* opaque string that can be used to map a session-id to the logout request in
|
|
* order to support single-signout in applications that manage their own sessions
|
|
* (rather than letting phpCAS start and destroy the session).
|
|
*
|
|
* @param callable $function callback function to call
|
|
* @param array $additionalArgs optional array of arguments
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setSingleSignoutCallback ($function, array $additionalArgs = array())
|
|
{
|
|
$this->_signoutCallbackFunction = $function;
|
|
$this->_signoutCallbackArgs = $additionalArgs;
|
|
}
|
|
|
|
// ########################################################################
|
|
// Methods for supplying code-flow feedback to integrators.
|
|
// ########################################################################
|
|
|
|
/**
|
|
* Ensure that this is actually a proxy object or fail with an exception
|
|
*
|
|
* @throws CAS_OutOfSequenceBeforeProxyException
|
|
*
|
|
* @return void
|
|
*/
|
|
public function ensureIsProxy()
|
|
{
|
|
if (!$this->isProxy()) {
|
|
throw new CAS_OutOfSequenceBeforeProxyException();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Mark the caller of authentication. This will help client integraters determine
|
|
* problems with their code flow if they call a function such as getUser() before
|
|
* authentication has occurred.
|
|
*
|
|
* @param bool $auth True if authentication was successful, false otherwise.
|
|
*
|
|
* @return null
|
|
*/
|
|
public function markAuthenticationCall ($auth)
|
|
{
|
|
// store where the authentication has been checked and the result
|
|
$dbg = debug_backtrace();
|
|
$this->_authentication_caller = array (
|
|
'file' => $dbg[1]['file'],
|
|
'line' => $dbg[1]['line'],
|
|
'method' => $dbg[1]['class'] . '::' . $dbg[1]['function'],
|
|
'result' => (boolean)$auth
|
|
);
|
|
}
|
|
private $_authentication_caller;
|
|
|
|
/**
|
|
* Answer true if authentication has been checked.
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function wasAuthenticationCalled ()
|
|
{
|
|
return !empty($this->_authentication_caller);
|
|
}
|
|
|
|
/**
|
|
* Ensure that authentication was checked. Terminate with exception if no
|
|
* authentication was performed
|
|
*
|
|
* @throws CAS_OutOfSequenceBeforeAuthenticationCallException
|
|
*
|
|
* @return void
|
|
*/
|
|
private function _ensureAuthenticationCalled()
|
|
{
|
|
if (!$this->wasAuthenticationCalled()) {
|
|
throw new CAS_OutOfSequenceBeforeAuthenticationCallException();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Answer the result of the authentication call.
|
|
*
|
|
* Throws a CAS_OutOfSequenceException if wasAuthenticationCalled() is false
|
|
* and markAuthenticationCall() didn't happen.
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function wasAuthenticationCallSuccessful ()
|
|
{
|
|
$this->_ensureAuthenticationCalled();
|
|
return $this->_authentication_caller['result'];
|
|
}
|
|
|
|
|
|
/**
|
|
* Ensure that authentication was checked. Terminate with exception if no
|
|
* authentication was performed
|
|
*
|
|
* @throws CAS_OutOfSequenceException
|
|
*
|
|
* @return void
|
|
*/
|
|
public function ensureAuthenticationCallSuccessful()
|
|
{
|
|
$this->_ensureAuthenticationCalled();
|
|
if (!$this->_authentication_caller['result']) {
|
|
throw new CAS_OutOfSequenceException(
|
|
'authentication was checked (by '
|
|
. $this->getAuthenticationCallerMethod()
|
|
. '() at ' . $this->getAuthenticationCallerFile()
|
|
. ':' . $this->getAuthenticationCallerLine()
|
|
. ') but the method returned false'
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Answer information about the authentication caller.
|
|
*
|
|
* Throws a CAS_OutOfSequenceException if wasAuthenticationCalled() is false
|
|
* and markAuthenticationCall() didn't happen.
|
|
*
|
|
* @return string the file that called authentication
|
|
*/
|
|
public function getAuthenticationCallerFile ()
|
|
{
|
|
$this->_ensureAuthenticationCalled();
|
|
return $this->_authentication_caller['file'];
|
|
}
|
|
|
|
/**
|
|
* Answer information about the authentication caller.
|
|
*
|
|
* Throws a CAS_OutOfSequenceException if wasAuthenticationCalled() is false
|
|
* and markAuthenticationCall() didn't happen.
|
|
*
|
|
* @return int the line that called authentication
|
|
*/
|
|
public function getAuthenticationCallerLine ()
|
|
{
|
|
$this->_ensureAuthenticationCalled();
|
|
return $this->_authentication_caller['line'];
|
|
}
|
|
|
|
/**
|
|
* Answer information about the authentication caller.
|
|
*
|
|
* Throws a CAS_OutOfSequenceException if wasAuthenticationCalled() is false
|
|
* and markAuthenticationCall() didn't happen.
|
|
*
|
|
* @return string the method that called authentication
|
|
*/
|
|
public function getAuthenticationCallerMethod ()
|
|
{
|
|
$this->_ensureAuthenticationCalled();
|
|
return $this->_authentication_caller['method'];
|
|
}
|
|
|
|
/** @} */
|
|
|
|
// ########################################################################
|
|
// CONSTRUCTOR
|
|
// ########################################################################
|
|
/**
|
|
* @addtogroup internalConfig
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* CAS_Client constructor.
|
|
*
|
|
* @param string $server_version the version of the CAS server
|
|
* @param bool $proxy true if the CAS client is a CAS proxy
|
|
* @param string $server_hostname the hostname of the CAS server
|
|
* @param int $server_port the port the CAS server is running on
|
|
* @param string $server_uri the URI the CAS server is responding on
|
|
* @param bool $changeSessionID Allow phpCAS to change the session_id
|
|
* (Single Sign Out/handleLogoutRequests
|
|
* is based on that change)
|
|
*
|
|
* @return self a newly created CAS_Client object
|
|
*/
|
|
public function __construct(
|
|
$server_version,
|
|
$proxy,
|
|
$server_hostname,
|
|
$server_port,
|
|
$server_uri,
|
|
$changeSessionID = true
|
|
) {
|
|
// Argument validation
|
|
if (gettype($server_version) != 'string')
|
|
throw new CAS_TypeMismatchException($server_version, '$server_version', 'string');
|
|
if (gettype($proxy) != 'boolean')
|
|
throw new CAS_TypeMismatchException($proxy, '$proxy', 'boolean');
|
|
if (gettype($server_hostname) != 'string')
|
|
throw new CAS_TypeMismatchException($server_hostname, '$server_hostname', 'string');
|
|
if (gettype($server_port) != 'integer')
|
|
throw new CAS_TypeMismatchException($server_port, '$server_port', 'integer');
|
|
if (gettype($server_uri) != 'string')
|
|
throw new CAS_TypeMismatchException($server_uri, '$server_uri', 'string');
|
|
if (gettype($changeSessionID) != 'boolean')
|
|
throw new CAS_TypeMismatchException($changeSessionID, '$changeSessionID', 'boolean');
|
|
|
|
phpCAS::traceBegin();
|
|
// true : allow to change the session_id(), false session_id won't be
|
|
// change and logout won't be handle because of that
|
|
$this->_setChangeSessionID($changeSessionID);
|
|
|
|
// skip Session Handling for logout requests and if don't want it'
|
|
if (session_id()=="" && !$this->_isLogoutRequest()) {
|
|
session_start();
|
|
phpCAS :: trace("Starting a new session " . session_id());
|
|
}
|
|
// Only for debug purposes
|
|
if ($this->isSessionAuthenticated()){
|
|
phpCAS :: trace("Session is authenticated as: " . $_SESSION['phpCAS']['user']);
|
|
} else {
|
|
phpCAS :: trace("Session is not authenticated");
|
|
}
|
|
// are we in proxy mode ?
|
|
$this->_proxy = $proxy;
|
|
|
|
// Make cookie handling available.
|
|
if ($this->isProxy()) {
|
|
if (!isset($_SESSION['phpCAS'])) {
|
|
$_SESSION['phpCAS'] = array();
|
|
}
|
|
if (!isset($_SESSION['phpCAS']['service_cookies'])) {
|
|
$_SESSION['phpCAS']['service_cookies'] = array();
|
|
}
|
|
$this->_serviceCookieJar = new CAS_CookieJar(
|
|
$_SESSION['phpCAS']['service_cookies']
|
|
);
|
|
}
|
|
|
|
// check version
|
|
$supportedProtocols = phpCAS::getSupportedProtocols();
|
|
if (isset($supportedProtocols[$server_version]) === false) {
|
|
phpCAS::error(
|
|
'this version of CAS (`'.$server_version
|
|
.'\') is not supported by phpCAS '.phpCAS::getVersion()
|
|
);
|
|
}
|
|
|
|
if ($server_version === CAS_VERSION_1_0 && $this->isProxy()) {
|
|
phpCAS::error(
|
|
'CAS proxies are not supported in CAS '.$server_version
|
|
);
|
|
}
|
|
|
|
$this->_server['version'] = $server_version;
|
|
|
|
// check hostname
|
|
if ( empty($server_hostname)
|
|
|| !preg_match('/[\.\d\-a-z]*/', $server_hostname)
|
|
) {
|
|
phpCAS::error('bad CAS server hostname (`'.$server_hostname.'\')');
|
|
}
|
|
$this->_server['hostname'] = $server_hostname;
|
|
|
|
// check port
|
|
if ( $server_port == 0
|
|
|| !is_int($server_port)
|
|
) {
|
|
phpCAS::error('bad CAS server port (`'.$server_hostname.'\')');
|
|
}
|
|
$this->_server['port'] = $server_port;
|
|
|
|
// check URI
|
|
if ( !preg_match('/[\.\d\-_a-z\/]*/', $server_uri) ) {
|
|
phpCAS::error('bad CAS server URI (`'.$server_uri.'\')');
|
|
}
|
|
// add leading and trailing `/' and remove doubles
|
|
if(strstr($server_uri, '?') === false) $server_uri .= '/';
|
|
$server_uri = preg_replace('/\/\//', '/', '/'.$server_uri);
|
|
$this->_server['uri'] = $server_uri;
|
|
|
|
// set to callback mode if PgtIou and PgtId CGI GET parameters are provided
|
|
if ( $this->isProxy() ) {
|
|
$this->_setCallbackMode(!empty($_GET['pgtIou'])&&!empty($_GET['pgtId']));
|
|
}
|
|
|
|
if ( $this->_isCallbackMode() ) {
|
|
//callback mode: check that phpCAS is secured
|
|
if ( !$this->_isHttps() ) {
|
|
phpCAS::error(
|
|
'CAS proxies must be secured to use phpCAS; PGT\'s will not be received from the CAS server'
|
|
);
|
|
}
|
|
} else {
|
|
//normal mode: get ticket and remove it from CGI parameters for
|
|
// developers
|
|
$ticket = (isset($_GET['ticket']) ? $_GET['ticket'] : null);
|
|
if (preg_match('/^[SP]T-/', $ticket) ) {
|
|
phpCAS::trace('Ticket \''.$ticket.'\' found');
|
|
$this->setTicket($ticket);
|
|
unset($_GET['ticket']);
|
|
} else if ( !empty($ticket) ) {
|
|
//ill-formed ticket, halt
|
|
phpCAS::error(
|
|
'ill-formed ticket found in the URL (ticket=`'
|
|
.htmlentities($ticket).'\')'
|
|
);
|
|
}
|
|
|
|
}
|
|
phpCAS::traceEnd();
|
|
}
|
|
|
|
/** @} */
|
|
|
|
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
|
|
// XX XX
|
|
// XX Session Handling XX
|
|
// XX XX
|
|
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
|
|
|
|
/**
|
|
* @addtogroup internalConfig
|
|
* @{
|
|
*/
|
|
|
|
|
|
/**
|
|
* @var bool A variable to whether phpcas will use its own session handling. Default = true
|
|
* @hideinitializer
|
|
*/
|
|
private $_change_session_id = true;
|
|
|
|
/**
|
|
* Set a parameter whether to allow phpCAS to change session_id
|
|
*
|
|
* @param bool $allowed allow phpCAS to change session_id
|
|
*
|
|
* @return void
|
|
*/
|
|
private function _setChangeSessionID($allowed)
|
|
{
|
|
$this->_change_session_id = $allowed;
|
|
}
|
|
|
|
/**
|
|
* Get whether phpCAS is allowed to change session_id
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function getChangeSessionID()
|
|
{
|
|
return $this->_change_session_id;
|
|
}
|
|
|
|
/** @} */
|
|
|
|
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
|
|
// XX XX
|
|
// XX AUTHENTICATION XX
|
|
// XX XX
|
|
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
|
|
|
|
/**
|
|
* @addtogroup internalAuthentication
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* The Authenticated user. Written by CAS_Client::_setUser(), read by
|
|
* CAS_Client::getUser().
|
|
*
|
|
* @hideinitializer
|
|
*/
|
|
private $_user = '';
|
|
|
|
/**
|
|
* This method sets the CAS user's login name.
|
|
*
|
|
* @param string $user the login name of the authenticated user.
|
|
*
|
|
* @return void
|
|
*/
|
|
private function _setUser($user)
|
|
{
|
|
$this->_user = $user;
|
|
}
|
|
|
|
/**
|
|
* This method returns the CAS user's login name.
|
|
*
|
|
* @return string the login name of the authenticated user
|
|
*
|
|
* @warning should be called only after CAS_Client::forceAuthentication() or
|
|
* CAS_Client::isAuthenticated(), otherwise halt with an error.
|
|
*/
|
|
public function getUser()
|
|
{
|
|
// Sequence validation
|
|
$this->ensureAuthenticationCallSuccessful();
|
|
|
|
return $this->_getUser();
|
|
}
|
|
|
|
/**
|
|
* This method returns the CAS user's login name.
|
|
*
|
|
* @return string the login name of the authenticated user
|
|
*
|
|
* @warning should be called only after CAS_Client::forceAuthentication() or
|
|
* CAS_Client::isAuthenticated(), otherwise halt with an error.
|
|
*/
|
|
private function _getUser()
|
|
{
|
|
// This is likely a duplicate check that could be removed....
|
|
if ( empty($this->_user) ) {
|
|
phpCAS::error(
|
|
'this method should be used only after '.__CLASS__
|
|
.'::forceAuthentication() or '.__CLASS__.'::isAuthenticated()'
|
|
);
|
|
}
|
|
return $this->_user;
|
|
}
|
|
|
|
/**
|
|
* The Authenticated users attributes. Written by
|
|
* CAS_Client::setAttributes(), read by CAS_Client::getAttributes().
|
|
* @attention client applications should use phpCAS::getAttributes().
|
|
*
|
|
* @hideinitializer
|
|
*/
|
|
private $_attributes = array();
|
|
|
|
/**
|
|
* Set an array of attributes
|
|
*
|
|
* @param array $attributes a key value array of attributes
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setAttributes($attributes)
|
|
{
|
|
$this->_attributes = $attributes;
|
|
}
|
|
|
|
/**
|
|
* Get an key values arry of attributes
|
|
*
|
|
* @return array of attributes
|
|
*/
|
|
public function getAttributes()
|
|
{
|
|
// Sequence validation
|
|
$this->ensureAuthenticationCallSuccessful();
|
|
// This is likely a duplicate check that could be removed....
|
|
if ( empty($this->_user) ) {
|
|
// if no user is set, there shouldn't be any attributes also...
|
|
phpCAS::error(
|
|
'this method should be used only after '.__CLASS__
|
|
.'::forceAuthentication() or '.__CLASS__.'::isAuthenticated()'
|
|
);
|
|
}
|
|
return $this->_attributes;
|
|
}
|
|
|
|
/**
|
|
* Check whether attributes are available
|
|
*
|
|
* @return bool attributes available
|
|
*/
|
|
public function hasAttributes()
|
|
{
|
|
// Sequence validation
|
|
$this->ensureAuthenticationCallSuccessful();
|
|
|
|
return !empty($this->_attributes);
|
|
}
|
|
/**
|
|
* Check whether a specific attribute with a name is available
|
|
*
|
|
* @param string $key name of attribute
|
|
*
|
|
* @return bool is attribute available
|
|
*/
|
|
public function hasAttribute($key)
|
|
{
|
|
// Sequence validation
|
|
$this->ensureAuthenticationCallSuccessful();
|
|
|
|
return $this->_hasAttribute($key);
|
|
}
|
|
|
|
/**
|
|
* Check whether a specific attribute with a name is available
|
|
*
|
|
* @param string $key name of attribute
|
|
*
|
|
* @return bool is attribute available
|
|
*/
|
|
private function _hasAttribute($key)
|
|
{
|
|
return (is_array($this->_attributes)
|
|
&& array_key_exists($key, $this->_attributes));
|
|
}
|
|
|
|
/**
|
|
* Get a specific attribute by name
|
|
*
|
|
* @param string $key name of attribute
|
|
*
|
|
* @return string attribute values
|
|
*/
|
|
public function getAttribute($key)
|
|
{
|
|
// Sequence validation
|
|
$this->ensureAuthenticationCallSuccessful();
|
|
|
|
if ($this->_hasAttribute($key)) {
|
|
return $this->_attributes[$key];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This method is called to renew the authentication of the user
|
|
* If the user is authenticated, renew the connection
|
|
* If not, redirect to CAS
|
|
*
|
|
* @return bool true when the user is authenticated; otherwise halt.
|
|
*/
|
|
public function renewAuthentication()
|
|
{
|
|
phpCAS::traceBegin();
|
|
// Either way, the user is authenticated by CAS
|
|
if (isset( $_SESSION['phpCAS']['auth_checked'])) {
|
|
unset($_SESSION['phpCAS']['auth_checked']);
|
|
}
|
|
if ( $this->isAuthenticated(true) ) {
|
|
phpCAS::trace('user already authenticated');
|
|
$res = true;
|
|
} else {
|
|
$this->redirectToCas(false, true);
|
|
// never reached
|
|
$res = false;
|
|
}
|
|
phpCAS::traceEnd();
|
|
return $res;
|
|
}
|
|
|
|
/**
|
|
* This method is called to be sure that the user is authenticated. When not
|
|
* authenticated, halt by redirecting to the CAS server; otherwise return true.
|
|
*
|
|
* @return bool true when the user is authenticated; otherwise halt.
|
|
*/
|
|
public function forceAuthentication()
|
|
{
|
|
phpCAS::traceBegin();
|
|
|
|
if ( $this->isAuthenticated() ) {
|
|
// the user is authenticated, nothing to be done.
|
|
phpCAS::trace('no need to authenticate');
|
|
$res = true;
|
|
} else {
|
|
// the user is not authenticated, redirect to the CAS server
|
|
if (isset($_SESSION['phpCAS']['auth_checked'])) {
|
|
unset($_SESSION['phpCAS']['auth_checked']);
|
|
}
|
|
$this->redirectToCas(false/* no gateway */);
|
|
// never reached
|
|
$res = false;
|
|
}
|
|
phpCAS::traceEnd($res);
|
|
return $res;
|
|
}
|
|
|
|
/**
|
|
* An integer that gives the number of times authentication will be cached
|
|
* before rechecked.
|
|
*
|
|
* @hideinitializer
|
|
*/
|
|
private $_cache_times_for_auth_recheck = 0;
|
|
|
|
/**
|
|
* Set the number of times authentication will be cached before rechecked.
|
|
*
|
|
* @param int $n number of times to wait for a recheck
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setCacheTimesForAuthRecheck($n)
|
|
{
|
|
if (gettype($n) != 'integer')
|
|
throw new CAS_TypeMismatchException($n, '$n', 'string');
|
|
|
|
$this->_cache_times_for_auth_recheck = $n;
|
|
}
|
|
|
|
/**
|
|
* This method is called to check whether the user is authenticated or not.
|
|
*
|
|
* @return bool true when the user is authenticated, false when a previous
|
|
* gateway login failed or the function will not return if the user is
|
|
* redirected to the cas server for a gateway login attempt
|
|
*/
|
|
public function checkAuthentication()
|
|
{
|
|
phpCAS::traceBegin();
|
|
if ( $this->isAuthenticated() ) {
|
|
phpCAS::trace('user is authenticated');
|
|
/* The 'auth_checked' variable is removed just in case it's set. */
|
|
unset($_SESSION['phpCAS']['auth_checked']);
|
|
$res = true;
|
|
} else if (isset($_SESSION['phpCAS']['auth_checked'])) {
|
|
// the previous request has redirected the client to the CAS server
|
|
// with gateway=true
|
|
unset($_SESSION['phpCAS']['auth_checked']);
|
|
$res = false;
|
|
} else {
|
|
// avoid a check against CAS on every request
|
|
if (!isset($_SESSION['phpCAS']['unauth_count'])) {
|
|
$_SESSION['phpCAS']['unauth_count'] = -2; // uninitialized
|
|
}
|
|
|
|
if (($_SESSION['phpCAS']['unauth_count'] != -2
|
|
&& $this->_cache_times_for_auth_recheck == -1)
|
|
|| ($_SESSION['phpCAS']['unauth_count'] >= 0
|
|
&& $_SESSION['phpCAS']['unauth_count'] < $this->_cache_times_for_auth_recheck)
|
|
) {
|
|
$res = false;
|
|
|
|
if ($this->_cache_times_for_auth_recheck != -1) {
|
|
$_SESSION['phpCAS']['unauth_count']++;
|
|
phpCAS::trace(
|
|
'user is not authenticated (cached for '
|
|
.$_SESSION['phpCAS']['unauth_count'].' times of '
|
|
.$this->_cache_times_for_auth_recheck.')'
|
|
);
|
|
} else {
|
|
phpCAS::trace(
|
|
'user is not authenticated (cached for until login pressed)'
|
|
);
|
|
}
|
|
} else {
|
|
$_SESSION['phpCAS']['unauth_count'] = 0;
|
|
$_SESSION['phpCAS']['auth_checked'] = true;
|
|
phpCAS::trace('user is not authenticated (cache reset)');
|
|
$this->redirectToCas(true/* gateway */);
|
|
// never reached
|
|
$res = false;
|
|
}
|
|
}
|
|
phpCAS::traceEnd($res);
|
|
return $res;
|
|
}
|
|
|
|
/**
|
|
* This method is called to check if the user is authenticated (previously or by
|
|
* tickets given in the URL).
|
|
*
|
|
* @param bool $renew true to force the authentication with the CAS server
|
|
*
|
|
* @return bool true when the user is authenticated. Also may redirect to the
|
|
* same URL without the ticket.
|
|
*/
|
|
public function isAuthenticated($renew=false)
|
|
{
|
|
phpCAS::traceBegin();
|
|
$res = false;
|
|
$validate_url = '';
|
|
if ( $this->_wasPreviouslyAuthenticated() ) {
|
|
if ($this->hasTicket()) {
|
|
// User has a additional ticket but was already authenticated
|
|
phpCAS::trace(
|
|
'ticket was present and will be discarded, use renewAuthenticate()'
|
|
);
|
|
if ($this->_clearTicketsFromUrl) {
|
|
phpCAS::trace("Prepare redirect to : ".$this->getURL());
|
|
session_write_close();
|
|
header('Location: '.$this->getURL());
|
|
flush();
|
|
phpCAS::traceExit();
|
|
throw new CAS_GracefullTerminationException();
|
|
} else {
|
|
phpCAS::trace(
|
|
'Already authenticated, but skipping ticket clearing since setNoClearTicketsFromUrl() was used.'
|
|
);
|
|
$res = true;
|
|
}
|
|
} else {
|
|
// the user has already (previously during the session) been
|
|
// authenticated, nothing to be done.
|
|
phpCAS::trace(
|
|
'user was already authenticated, no need to look for tickets'
|
|
);
|
|
$res = true;
|
|
}
|
|
|
|
// Mark the auth-check as complete to allow post-authentication
|
|
// callbacks to make use of phpCAS::getUser() and similar methods
|
|
$this->markAuthenticationCall($res);
|
|
} else {
|
|
if ($this->hasTicket()) {
|
|
switch ($this->getServerVersion()) {
|
|
case CAS_VERSION_1_0:
|
|
// if a Service Ticket was given, validate it
|
|
phpCAS::trace(
|
|
'CAS 1.0 ticket `'.$this->getTicket().'\' is present'
|
|
);
|
|
$this->validateCAS10(
|
|
$validate_url, $text_response, $tree_response, $renew
|
|
); // if it fails, it halts
|
|
phpCAS::trace(
|
|
'CAS 1.0 ticket `'.$this->getTicket().'\' was validated'
|
|
);
|
|
$_SESSION['phpCAS']['user'] = $this->_getUser();
|
|
$res = true;
|
|
$logoutTicket = $this->getTicket();
|
|
break;
|
|
case CAS_VERSION_2_0:
|
|
case CAS_VERSION_3_0:
|
|
// if a Proxy Ticket was given, validate it
|
|
phpCAS::trace(
|
|
'CAS '.$this->getServerVersion().' ticket `'.$this->getTicket().'\' is present'
|
|
);
|
|
$this->validateCAS20(
|
|
$validate_url, $text_response, $tree_response, $renew
|
|
); // note: if it fails, it halts
|
|
phpCAS::trace(
|
|
'CAS '.$this->getServerVersion().' ticket `'.$this->getTicket().'\' was validated'
|
|
);
|
|
if ( $this->isProxy() ) {
|
|
$this->_validatePGT(
|
|
$validate_url, $text_response, $tree_response
|
|
); // idem
|
|
phpCAS::trace('PGT `'.$this->_getPGT().'\' was validated');
|
|
$_SESSION['phpCAS']['pgt'] = $this->_getPGT();
|
|
}
|
|
$_SESSION['phpCAS']['user'] = $this->_getUser();
|
|
if (!empty($this->_attributes)) {
|
|
$_SESSION['phpCAS']['attributes'] = $this->_attributes;
|
|
}
|
|
$proxies = $this->getProxies();
|
|
if (!empty($proxies)) {
|
|
$_SESSION['phpCAS']['proxies'] = $this->getProxies();
|
|
}
|
|
$res = true;
|
|
$logoutTicket = $this->getTicket();
|
|
break;
|
|
case SAML_VERSION_1_1:
|
|
// if we have a SAML ticket, validate it.
|
|
phpCAS::trace(
|
|
'SAML 1.1 ticket `'.$this->getTicket().'\' is present'
|
|
);
|
|
$this->validateSA(
|
|
$validate_url, $text_response, $tree_response, $renew
|
|
); // if it fails, it halts
|
|
phpCAS::trace(
|
|
'SAML 1.1 ticket `'.$this->getTicket().'\' was validated'
|
|
);
|
|
$_SESSION['phpCAS']['user'] = $this->_getUser();
|
|
$_SESSION['phpCAS']['attributes'] = $this->_attributes;
|
|
$res = true;
|
|
$logoutTicket = $this->getTicket();
|
|
break;
|
|
default:
|
|
phpCAS::trace('Protocoll error');
|
|
break;
|
|
}
|
|
} else {
|
|
// no ticket given, not authenticated
|
|
phpCAS::trace('no ticket found');
|
|
}
|
|
|
|
// Mark the auth-check as complete to allow post-authentication
|
|
// callbacks to make use of phpCAS::getUser() and similar methods
|
|
$this->markAuthenticationCall($res);
|
|
|
|
if ($res) {
|
|
// call the post-authenticate callback if registered.
|
|
if ($this->_postAuthenticateCallbackFunction) {
|
|
$args = $this->_postAuthenticateCallbackArgs;
|
|
array_unshift($args, $logoutTicket);
|
|
call_user_func_array(
|
|
$this->_postAuthenticateCallbackFunction, $args
|
|
);
|
|
}
|
|
|
|
// if called with a ticket parameter, we need to redirect to the
|
|
// app without the ticket so that CAS-ification is transparent
|
|
// to the browser (for later POSTS) most of the checks and
|
|
// errors should have been made now, so we're safe for redirect
|
|
// without masking error messages. remove the ticket as a
|
|
// security precaution to prevent a ticket in the HTTP_REFERRER
|
|
if ($this->_clearTicketsFromUrl) {
|
|
phpCAS::trace("Prepare redirect to : ".$this->getURL());
|
|
session_write_close();
|
|
header('Location: '.$this->getURL());
|
|
flush();
|
|
phpCAS::traceExit();
|
|
throw new CAS_GracefullTerminationException();
|
|
}
|
|
}
|
|
}
|
|
phpCAS::traceEnd($res);
|
|
return $res;
|
|
}
|
|
|
|
/**
|
|
* This method tells if the current session is authenticated.
|
|
*
|
|
* @return bool true if authenticated based soley on $_SESSION variable
|
|
*/
|
|
public function isSessionAuthenticated ()
|
|
{
|
|
return !empty($_SESSION['phpCAS']['user']);
|
|
}
|
|
|
|
/**
|
|
* This method tells if the user has already been (previously) authenticated
|
|
* by looking into the session variables.
|
|
*
|
|
* @note This function switches to callback mode when needed.
|
|
*
|
|
* @return bool true when the user has already been authenticated; false otherwise.
|
|
*/
|
|
private function _wasPreviouslyAuthenticated()
|
|
{
|
|
phpCAS::traceBegin();
|
|
|
|
if ( $this->_isCallbackMode() ) {
|
|
// Rebroadcast the pgtIou and pgtId to all nodes
|
|
if ($this->_rebroadcast&&!isset($_POST['rebroadcast'])) {
|
|
$this->_rebroadcast(self::PGTIOU);
|
|
}
|
|
$this->_callback();
|
|
}
|
|
|
|
$auth = false;
|
|
|
|
if ( $this->isProxy() ) {
|
|
// CAS proxy: username and PGT must be present
|
|
if ( $this->isSessionAuthenticated()
|
|
&& !empty($_SESSION['phpCAS']['pgt'])
|
|
) {
|
|
// authentication already done
|
|
$this->_setUser($_SESSION['phpCAS']['user']);
|
|
if (isset($_SESSION['phpCAS']['attributes'])) {
|
|
$this->setAttributes($_SESSION['phpCAS']['attributes']);
|
|
}
|
|
$this->_setPGT($_SESSION['phpCAS']['pgt']);
|
|
phpCAS::trace(
|
|
'user = `'.$_SESSION['phpCAS']['user'].'\', PGT = `'
|
|
.$_SESSION['phpCAS']['pgt'].'\''
|
|
);
|
|
|
|
// Include the list of proxies
|
|
if (isset($_SESSION['phpCAS']['proxies'])) {
|
|
$this->_setProxies($_SESSION['phpCAS']['proxies']);
|
|
phpCAS::trace(
|
|
'proxies = "'
|
|
.implode('", "', $_SESSION['phpCAS']['proxies']).'"'
|
|
);
|
|
}
|
|
|
|
$auth = true;
|
|
} elseif ( $this->isSessionAuthenticated()
|
|
&& empty($_SESSION['phpCAS']['pgt'])
|
|
) {
|
|
// these two variables should be empty or not empty at the same time
|
|
phpCAS::trace(
|
|
'username found (`'.$_SESSION['phpCAS']['user']
|
|
.'\') but PGT is empty'
|
|
);
|
|
// unset all tickets to enforce authentication
|
|
unset($_SESSION['phpCAS']);
|
|
$this->setTicket('');
|
|
} elseif ( !$this->isSessionAuthenticated()
|
|
&& !empty($_SESSION['phpCAS']['pgt'])
|
|
) {
|
|
// these two variables should be empty or not empty at the same time
|
|
phpCAS::trace(
|
|
'PGT found (`'.$_SESSION['phpCAS']['pgt']
|
|
.'\') but username is empty'
|
|
);
|
|
// unset all tickets to enforce authentication
|
|
unset($_SESSION['phpCAS']);
|
|
$this->setTicket('');
|
|
} else {
|
|
phpCAS::trace('neither user nor PGT found');
|
|
}
|
|
} else {
|
|
// `simple' CAS client (not a proxy): username must be present
|
|
if ( $this->isSessionAuthenticated() ) {
|
|
// authentication already done
|
|
$this->_setUser($_SESSION['phpCAS']['user']);
|
|
if (isset($_SESSION['phpCAS']['attributes'])) {
|
|
$this->setAttributes($_SESSION['phpCAS']['attributes']);
|
|
}
|
|
phpCAS::trace('user = `'.$_SESSION['phpCAS']['user'].'\'');
|
|
|
|
// Include the list of proxies
|
|
if (isset($_SESSION['phpCAS']['proxies'])) {
|
|
$this->_setProxies($_SESSION['phpCAS']['proxies']);
|
|
phpCAS::trace(
|
|
'proxies = "'
|
|
.implode('", "', $_SESSION['phpCAS']['proxies']).'"'
|
|
);
|
|
}
|
|
|
|
$auth = true;
|
|
} else {
|
|
phpCAS::trace('no user found');
|
|
}
|
|
}
|
|
|
|
phpCAS::traceEnd($auth);
|
|
return $auth;
|
|
}
|
|
|
|
/**
|
|
* This method is used to redirect the client to the CAS server.
|
|
* It is used by CAS_Client::forceAuthentication() and
|
|
* CAS_Client::checkAuthentication().
|
|
*
|
|
* @param bool $gateway true to check authentication, false to force it
|
|
* @param bool $renew true to force the authentication with the CAS server
|
|
*
|
|
* @return void
|
|
*/
|
|
public function redirectToCas($gateway=false,$renew=false)
|
|
{
|
|
phpCAS::traceBegin();
|
|
$cas_url = $this->getServerLoginURL($gateway, $renew);
|
|
session_write_close();
|
|
if (php_sapi_name() === 'cli') {
|
|
@header('Location: '.$cas_url);
|
|
} else {
|
|
header('Location: '.$cas_url);
|
|
}
|
|
phpCAS::trace("Redirect to : ".$cas_url);
|
|
$lang = $this->getLangObj();
|
|
$this->printHTMLHeader($lang->getAuthenticationWanted());
|
|
printf('<p>'. $lang->getShouldHaveBeenRedirected(). '</p>', $cas_url);
|
|
$this->printHTMLFooter();
|
|
phpCAS::traceExit();
|
|
throw new CAS_GracefullTerminationException();
|
|
}
|
|
|
|
|
|
/**
|
|
* This method is used to logout from CAS.
|
|
*
|
|
* @param array $params an array that contains the optional url and service
|
|
* parameters that will be passed to the CAS server
|
|
*
|
|
* @return void
|
|
*/
|
|
public function logout($params)
|
|
{
|
|
phpCAS::traceBegin();
|
|
$cas_url = $this->getServerLogoutURL();
|
|
$paramSeparator = '?';
|
|
if (isset($params['url'])) {
|
|
$cas_url = $cas_url . $paramSeparator . "url="
|
|
. urlencode($params['url']);
|
|
$paramSeparator = '&';
|
|
}
|
|
if (isset($params['service'])) {
|
|
$cas_url = $cas_url . $paramSeparator . "service="
|
|
. urlencode($params['service']);
|
|
}
|
|
header('Location: '.$cas_url);
|
|
phpCAS::trace("Prepare redirect to : ".$cas_url);
|
|
|
|
phpCAS::trace("Destroying session : ".session_id());
|
|
session_unset();
|
|
session_destroy();
|
|
if (session_status() === PHP_SESSION_NONE) {
|
|
phpCAS::trace("Session terminated");
|
|
} else {
|
|
phpCAS::error("Session was not terminated");
|
|
phpCAS::trace("Session was not terminated");
|
|
}
|
|
$lang = $this->getLangObj();
|
|
$this->printHTMLHeader($lang->getLogout());
|
|
printf('<p>'.$lang->getShouldHaveBeenRedirected(). '</p>', $cas_url);
|
|
$this->printHTMLFooter();
|
|
phpCAS::traceExit();
|
|
throw new CAS_GracefullTerminationException();
|
|
}
|
|
|
|
/**
|
|
* Check of the current request is a logout request
|
|
*
|
|
* @return bool is logout request.
|
|
*/
|
|
private function _isLogoutRequest()
|
|
{
|
|
return !empty($_POST['logoutRequest']);
|
|
}
|
|
|
|
/**
|
|
* This method handles logout requests.
|
|
*
|
|
* @param bool $check_client true to check the client bofore handling
|
|
* the request, false not to perform any access control. True by default.
|
|
* @param array $allowed_clients an array of host names allowed to send
|
|
* logout requests.
|
|
*
|
|
* @return void
|
|
*/
|
|
public function handleLogoutRequests($check_client=true, $allowed_clients=array())
|
|
{
|
|
phpCAS::traceBegin();
|
|
if (!$this->_isLogoutRequest()) {
|
|
phpCAS::trace("Not a logout request");
|
|
phpCAS::traceEnd();
|
|
return;
|
|
}
|
|
if (!$this->getChangeSessionID()
|
|
&& is_null($this->_signoutCallbackFunction)
|
|
) {
|
|
phpCAS::trace(
|
|
"phpCAS can't handle logout requests if it is not allowed to change session_id."
|
|
);
|
|
}
|
|
phpCAS::trace("Logout requested");
|
|
$decoded_logout_rq = urldecode($_POST['logoutRequest']);
|
|
phpCAS::trace("SAML REQUEST: ".$decoded_logout_rq);
|
|
$allowed = false;
|
|
if ($check_client) {
|
|
if ($allowed_clients === array()) {
|
|
$allowed_clients = array( $this->_getServerHostname() );
|
|
}
|
|
$client_ip = $_SERVER['REMOTE_ADDR'];
|
|
$client = gethostbyaddr($client_ip);
|
|
phpCAS::trace("Client: ".$client."/".$client_ip);
|
|
foreach ($allowed_clients as $allowed_client) {
|
|
if (($client == $allowed_client)
|
|
|| ($client_ip == $allowed_client)
|
|
) {
|
|
phpCAS::trace(
|
|
"Allowed client '".$allowed_client
|
|
."' matches, logout request is allowed"
|
|
);
|
|
$allowed = true;
|
|
break;
|
|
} else {
|
|
phpCAS::trace(
|
|
"Allowed client '".$allowed_client."' does not match"
|
|
);
|
|
}
|
|
}
|
|
} else {
|
|
phpCAS::trace("No access control set");
|
|
$allowed = true;
|
|
}
|
|
// If Logout command is permitted proceed with the logout
|
|
if ($allowed) {
|
|
phpCAS::trace("Logout command allowed");
|
|
// Rebroadcast the logout request
|
|
if ($this->_rebroadcast && !isset($_POST['rebroadcast'])) {
|
|
$this->_rebroadcast(self::LOGOUT);
|
|
}
|
|
// Extract the ticket from the SAML Request
|
|
preg_match(
|
|
"|<samlp:SessionIndex>(.*)</samlp:SessionIndex>|",
|
|
$decoded_logout_rq, $tick, PREG_OFFSET_CAPTURE, 3
|
|
);
|
|
$wrappedSamlSessionIndex = preg_replace(
|
|
'|<samlp:SessionIndex>|', '', $tick[0][0]
|
|
);
|
|
$ticket2logout = preg_replace(
|
|
'|</samlp:SessionIndex>|', '', $wrappedSamlSessionIndex
|
|
);
|
|
phpCAS::trace("Ticket to logout: ".$ticket2logout);
|
|
|
|
// call the post-authenticate callback if registered.
|
|
if ($this->_signoutCallbackFunction) {
|
|
$args = $this->_signoutCallbackArgs;
|
|
array_unshift($args, $ticket2logout);
|
|
call_user_func_array($this->_signoutCallbackFunction, $args);
|
|
}
|
|
|
|
// If phpCAS is managing the session_id, destroy session thanks to
|
|
// session_id.
|
|
if ($this->getChangeSessionID()) {
|
|
$session_id = $this->_sessionIdForTicket($ticket2logout);
|
|
phpCAS::trace("Session id: ".$session_id);
|
|
|
|
// destroy a possible application session created before phpcas
|
|
if (session_id() !== "") {
|
|
session_unset();
|
|
session_destroy();
|
|
}
|
|
// fix session ID
|
|
session_id($session_id);
|
|
$_COOKIE[session_name()]=$session_id;
|
|
$_GET[session_name()]=$session_id;
|
|
|
|
// Overwrite session
|
|
session_start();
|
|
session_unset();
|
|
session_destroy();
|
|
phpCAS::trace("Session ". $session_id . " destroyed");
|
|
}
|
|
} else {
|
|
phpCAS::error("Unauthorized logout request from client '".$client."'");
|
|
phpCAS::trace("Unauthorized logout request from client '".$client."'");
|
|
}
|
|
flush();
|
|
phpCAS::traceExit();
|
|
throw new CAS_GracefullTerminationException();
|
|
|
|
}
|
|
|
|
/** @} */
|
|
|
|
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
|
|
// XX XX
|
|
// XX BASIC CLIENT FEATURES (CAS 1.0) XX
|
|
// XX XX
|
|
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
|
|
|
|
// ########################################################################
|
|
// ST
|
|
// ########################################################################
|
|
/**
|
|
* @addtogroup internalBasic
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* The Ticket provided in the URL of the request if present
|
|
* (empty otherwise). Written by CAS_Client::CAS_Client(), read by
|
|
* CAS_Client::getTicket() and CAS_Client::_hasPGT().
|
|
*
|
|
* @hideinitializer
|
|
*/
|
|
private $_ticket = '';
|
|
|
|
/**
|
|
* This method returns the Service Ticket provided in the URL of the request.
|
|
*
|
|
* @return string service ticket.
|
|
*/
|
|
public function getTicket()
|
|
{
|
|
return $this->_ticket;
|
|
}
|
|
|
|
/**
|
|
* This method stores the Service Ticket.
|
|
*
|
|
* @param string $st The Service Ticket.
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setTicket($st)
|
|
{
|
|
$this->_ticket = $st;
|
|
}
|
|
|
|
/**
|
|
* This method tells if a Service Ticket was stored.
|
|
*
|
|
* @return bool if a Service Ticket has been stored.
|
|
*/
|
|
public function hasTicket()
|
|
{
|
|
return !empty($this->_ticket);
|
|
}
|
|
|
|
/** @} */
|
|
|
|
// ########################################################################
|
|
// ST VALIDATION
|
|
// ########################################################################
|
|
/**
|
|
* @addtogroup internalBasic
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @var string the certificate of the CAS server CA.
|
|
*
|
|
* @hideinitializer
|
|
*/
|
|
private $_cas_server_ca_cert = null;
|
|
|
|
|
|
/**
|
|
|
|
* validate CN of the CAS server certificate
|
|
|
|
*
|
|
|
|
* @hideinitializer
|
|
|
|
*/
|
|
|
|
private $_cas_server_cn_validate = true;
|
|
|
|
/**
|
|
* Set to true not to validate the CAS server.
|
|
*
|
|
* @hideinitializer
|
|
*/
|
|
private $_no_cas_server_validation = false;
|
|
|
|
|
|
/**
|
|
* Set the CA certificate of the CAS server.
|
|
*
|
|
* @param string $cert the PEM certificate file name of the CA that emited
|
|
* the cert of the server
|
|
* @param bool $validate_cn valiate CN of the CAS server certificate
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setCasServerCACert($cert, $validate_cn)
|
|
{
|
|
// Argument validation
|
|
if (gettype($cert) != 'string') {
|
|
throw new CAS_TypeMismatchException($cert, '$cert', 'string');
|
|
}
|
|
if (gettype($validate_cn) != 'boolean') {
|
|
throw new CAS_TypeMismatchException($validate_cn, '$validate_cn', 'boolean');
|
|
}
|
|
if ( !file_exists($cert) && $this->_requestImplementation !== 'CAS_TestHarness_DummyRequest'){
|
|
throw new CAS_InvalidArgumentException("Certificate file does not exist " . $this->_requestImplementation);
|
|
}
|
|
$this->_cas_server_ca_cert = $cert;
|
|
$this->_cas_server_cn_validate = $validate_cn;
|
|
}
|
|
|
|
/**
|
|
* Set no SSL validation for the CAS server.
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setNoCasServerValidation()
|
|
{
|
|
$this->_no_cas_server_validation = true;
|
|
}
|
|
|
|
/**
|
|
* This method is used to validate a CAS 1,0 ticket; halt on failure, and
|
|
* sets $validate_url, $text_reponse and $tree_response on success.
|
|
*
|
|
* @param string &$validate_url reference to the the URL of the request to
|
|
* the CAS server.
|
|
* @param string &$text_response reference to the response of the CAS
|
|
* server, as is (XML text).
|
|
* @param string &$tree_response reference to the response of the CAS
|
|
* server, as a DOM XML tree.
|
|
* @param bool $renew true to force the authentication with the CAS server
|
|
*
|
|
* @return bool true when successfull and issue a CAS_AuthenticationException
|
|
* and false on an error
|
|
* @throws CAS_AuthenticationException
|
|
*/
|
|
public function validateCAS10(&$validate_url,&$text_response,&$tree_response,$renew=false)
|
|
{
|
|
phpCAS::traceBegin();
|
|
// build the URL to validate the ticket
|
|
$validate_url = $this->getServerServiceValidateURL()
|
|
.'&ticket='.urlencode($this->getTicket());
|
|
|
|
if ( $renew ) {
|
|
// pass the renew
|
|
$validate_url .= '&renew=true';
|
|
}
|
|
|
|
// open and read the URL
|
|
if ( !$this->_readURL($validate_url, $headers, $text_response, $err_msg) ) {
|
|
phpCAS::trace(
|
|
'could not open URL \''.$validate_url.'\' to validate ('.$err_msg.')'
|
|
);
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'CAS 1.0 ticket not validated', $validate_url,
|
|
true/*$no_response*/
|
|
);
|
|
}
|
|
|
|
if (preg_match('/^no\n/', $text_response)) {
|
|
phpCAS::trace('Ticket has not been validated');
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'ST not validated', $validate_url, false/*$no_response*/,
|
|
false/*$bad_response*/, $text_response
|
|
);
|
|
} else if (!preg_match('/^yes\n/', $text_response)) {
|
|
phpCAS::trace('ill-formed response');
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'Ticket not validated', $validate_url,
|
|
false/*$no_response*/, true/*$bad_response*/, $text_response
|
|
);
|
|
}
|
|
// ticket has been validated, extract the user name
|
|
$arr = preg_split('/\n/', $text_response);
|
|
$this->_setUser(trim($arr[1]));
|
|
|
|
$this->_renameSession($this->getTicket());
|
|
|
|
// at this step, ticket has been validated and $this->_user has been set,
|
|
phpCAS::traceEnd(true);
|
|
return true;
|
|
}
|
|
|
|
/** @} */
|
|
|
|
|
|
// ########################################################################
|
|
// SAML VALIDATION
|
|
// ########################################################################
|
|
/**
|
|
* @addtogroup internalSAML
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* This method is used to validate a SAML TICKET; halt on failure, and sets
|
|
* $validate_url, $text_reponse and $tree_response on success. These
|
|
* parameters are used later by CAS_Client::_validatePGT() for CAS proxies.
|
|
*
|
|
* @param string &$validate_url reference to the the URL of the request to
|
|
* the CAS server.
|
|
* @param string &$text_response reference to the response of the CAS
|
|
* server, as is (XML text).
|
|
* @param string &$tree_response reference to the response of the CAS
|
|
* server, as a DOM XML tree.
|
|
* @param bool $renew true to force the authentication with the CAS server
|
|
*
|
|
* @return bool true when successfull and issue a CAS_AuthenticationException
|
|
* and false on an error
|
|
*
|
|
* @throws CAS_AuthenticationException
|
|
*/
|
|
public function validateSA(&$validate_url,&$text_response,&$tree_response,$renew=false)
|
|
{
|
|
phpCAS::traceBegin();
|
|
$result = false;
|
|
// build the URL to validate the ticket
|
|
$validate_url = $this->getServerSamlValidateURL();
|
|
|
|
if ( $renew ) {
|
|
// pass the renew
|
|
$validate_url .= '&renew=true';
|
|
}
|
|
|
|
// open and read the URL
|
|
if ( !$this->_readURL($validate_url, $headers, $text_response, $err_msg) ) {
|
|
phpCAS::trace(
|
|
'could not open URL \''.$validate_url.'\' to validate ('.$err_msg.')'
|
|
);
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'SA not validated', $validate_url, true/*$no_response*/
|
|
);
|
|
}
|
|
|
|
phpCAS::trace('server version: '.$this->getServerVersion());
|
|
|
|
// analyze the result depending on the version
|
|
switch ($this->getServerVersion()) {
|
|
case SAML_VERSION_1_1:
|
|
// create new DOMDocument Object
|
|
$dom = new DOMDocument();
|
|
// Fix possible whitspace problems
|
|
$dom->preserveWhiteSpace = false;
|
|
// read the response of the CAS server into a DOM object
|
|
if (!($dom->loadXML($text_response))) {
|
|
phpCAS::trace('dom->loadXML() failed');
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'SA not validated', $validate_url,
|
|
false/*$no_response*/, true/*$bad_response*/,
|
|
$text_response
|
|
);
|
|
}
|
|
// read the root node of the XML tree
|
|
if (!($tree_response = $dom->documentElement)) {
|
|
phpCAS::trace('documentElement() failed');
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'SA not validated', $validate_url,
|
|
false/*$no_response*/, true/*$bad_response*/,
|
|
$text_response
|
|
);
|
|
} else if ( $tree_response->localName != 'Envelope' ) {
|
|
// insure that tag name is 'Envelope'
|
|
phpCAS::trace(
|
|
'bad XML root node (should be `Envelope\' instead of `'
|
|
.$tree_response->localName.'\''
|
|
);
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'SA not validated', $validate_url,
|
|
false/*$no_response*/, true/*$bad_response*/,
|
|
$text_response
|
|
);
|
|
} else if ($tree_response->getElementsByTagName("NameIdentifier")->length != 0) {
|
|
// check for the NameIdentifier tag in the SAML response
|
|
$success_elements = $tree_response->getElementsByTagName("NameIdentifier");
|
|
phpCAS::trace('NameIdentifier found');
|
|
$user = trim($success_elements->item(0)->nodeValue);
|
|
phpCAS::trace('user = `'.$user.'`');
|
|
$this->_setUser($user);
|
|
$this->_setSessionAttributes($text_response);
|
|
$result = true;
|
|
} else {
|
|
phpCAS::trace('no <NameIdentifier> tag found in SAML payload');
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'SA not validated', $validate_url,
|
|
false/*$no_response*/, true/*$bad_response*/,
|
|
$text_response
|
|
);
|
|
}
|
|
}
|
|
if ($result) {
|
|
$this->_renameSession($this->getTicket());
|
|
}
|
|
// at this step, ST has been validated and $this->_user has been set,
|
|
phpCAS::traceEnd($result);
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* This method will parse the DOM and pull out the attributes from the SAML
|
|
* payload and put them into an array, then put the array into the session.
|
|
*
|
|
* @param string $text_response the SAML payload.
|
|
*
|
|
* @return bool true when successfull and false if no attributes a found
|
|
*/
|
|
private function _setSessionAttributes($text_response)
|
|
{
|
|
phpCAS::traceBegin();
|
|
|
|
$result = false;
|
|
|
|
$attr_array = array();
|
|
|
|
// create new DOMDocument Object
|
|
$dom = new DOMDocument();
|
|
// Fix possible whitspace problems
|
|
$dom->preserveWhiteSpace = false;
|
|
if (($dom->loadXML($text_response))) {
|
|
$xPath = new DOMXPath($dom);
|
|
$xPath->registerNamespace('samlp', 'urn:oasis:names:tc:SAML:1.0:protocol');
|
|
$xPath->registerNamespace('saml', 'urn:oasis:names:tc:SAML:1.0:assertion');
|
|
$nodelist = $xPath->query("//saml:Attribute");
|
|
|
|
if ($nodelist) {
|
|
foreach ($nodelist as $node) {
|
|
$xres = $xPath->query("saml:AttributeValue", $node);
|
|
$name = $node->getAttribute("AttributeName");
|
|
$value_array = array();
|
|
foreach ($xres as $node2) {
|
|
$value_array[] = $node2->nodeValue;
|
|
}
|
|
$attr_array[$name] = $value_array;
|
|
}
|
|
// UGent addition...
|
|
foreach ($attr_array as $attr_key => $attr_value) {
|
|
if (count($attr_value) > 1) {
|
|
$this->_attributes[$attr_key] = $attr_value;
|
|
phpCAS::trace("* " . $attr_key . "=" . print_r($attr_value, true));
|
|
} else {
|
|
$this->_attributes[$attr_key] = $attr_value[0];
|
|
phpCAS::trace("* " . $attr_key . "=" . $attr_value[0]);
|
|
}
|
|
}
|
|
$result = true;
|
|
} else {
|
|
phpCAS::trace("SAML Attributes are empty");
|
|
$result = false;
|
|
}
|
|
}
|
|
phpCAS::traceEnd($result);
|
|
return $result;
|
|
}
|
|
|
|
/** @} */
|
|
|
|
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
|
|
// XX XX
|
|
// XX PROXY FEATURES (CAS 2.0) XX
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// XX XX
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// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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// ########################################################################
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// PROXYING
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// ########################################################################
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/**
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* @addtogroup internalProxy
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* @{
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*/
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/**
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* @var bool is the client a proxy
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* A boolean telling if the client is a CAS proxy or not. Written by
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* CAS_Client::CAS_Client(), read by CAS_Client::isProxy().
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*/
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private $_proxy;
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/**
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* @var CAS_CookieJar Handler for managing service cookies.
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*/
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private $_serviceCookieJar;
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/**
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* Tells if a CAS client is a CAS proxy or not
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*
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* @return bool true when the CAS client is a CAS proxy, false otherwise
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*/
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public function isProxy()
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{
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return $this->_proxy;
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}
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/** @} */
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// ########################################################################
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// PGT
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// ########################################################################
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/**
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* @addtogroup internalProxy
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* @{
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*/
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/**
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* the Proxy Grnting Ticket given by the CAS server (empty otherwise).
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* Written by CAS_Client::_setPGT(), read by CAS_Client::_getPGT() and
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* CAS_Client::_hasPGT().
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*
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* @hideinitializer
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*/
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private $_pgt = '';
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/**
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* This method returns the Proxy Granting Ticket given by the CAS server.
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*
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* @return string the Proxy Granting Ticket.
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*/
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private function _getPGT()
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{
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return $this->_pgt;
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}
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/**
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* This method stores the Proxy Granting Ticket.
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*
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* @param string $pgt The Proxy Granting Ticket.
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*
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* @return void
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*/
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private function _setPGT($pgt)
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{
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$this->_pgt = $pgt;
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}
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/**
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* This method tells if a Proxy Granting Ticket was stored.
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*
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* @return bool true if a Proxy Granting Ticket has been stored.
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*/
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private function _hasPGT()
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{
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return !empty($this->_pgt);
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}
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/** @} */
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// ########################################################################
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// CALLBACK MODE
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// ########################################################################
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/**
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* @addtogroup internalCallback
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* @{
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*/
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/**
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* each PHP script using phpCAS in proxy mode is its own callback to get the
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* PGT back from the CAS server. callback_mode is detected by the constructor
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* thanks to the GET parameters.
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*/
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/**
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* @var bool a boolean to know if the CAS client is running in callback mode. Written by
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* CAS_Client::setCallBackMode(), read by CAS_Client::_isCallbackMode().
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*
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* @hideinitializer
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*/
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private $_callback_mode = false;
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/**
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* This method sets/unsets callback mode.
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*
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* @param bool $callback_mode true to set callback mode, false otherwise.
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*
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* @return void
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*/
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private function _setCallbackMode($callback_mode)
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{
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$this->_callback_mode = $callback_mode;
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}
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/**
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* This method returns true when the CAS client is running in callback mode,
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* false otherwise.
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*
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* @return bool A boolean.
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*/
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private function _isCallbackMode()
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{
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return $this->_callback_mode;
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}
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/**
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* the URL that should be used for the PGT callback (in fact the URL of the
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* current request without any CGI parameter). Written and read by
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* CAS_Client::_getCallbackURL().
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*
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* @hideinitializer
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*/
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private $_callback_url = '';
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/**
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* This method returns the URL that should be used for the PGT callback (in
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* fact the URL of the current request without any CGI parameter, except if
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* phpCAS::setFixedCallbackURL() was used).
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*
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* @return string The callback URL
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*/
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private function _getCallbackURL()
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{
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// the URL is built when needed only
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if ( empty($this->_callback_url) ) {
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// remove the ticket if present in the URL
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$final_uri = 'https://';
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$final_uri .= $this->_getClientUrl();
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$request_uri = $_SERVER['REQUEST_URI'];
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$request_uri = preg_replace('/\?.*$/', '', $request_uri);
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$final_uri .= $request_uri;
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$this->_callback_url = $final_uri;
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}
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return $this->_callback_url;
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}
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/**
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* This method sets the callback url.
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*
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* @param string $url url to set callback
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*
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* @return string the callback url
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*/
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public function setCallbackURL($url)
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{
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// Sequence validation
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$this->ensureIsProxy();
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// Argument Validation
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if (gettype($url) != 'string')
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throw new CAS_TypeMismatchException($url, '$url', 'string');
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return $this->_callback_url = $url;
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}
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/**
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* This method is called by CAS_Client::CAS_Client() when running in callback
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* mode. It stores the PGT and its PGT Iou, prints its output and halts.
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*
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* @return void
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*/
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private function _callback()
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{
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phpCAS::traceBegin();
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if (preg_match('/^PGTIOU-[\.\-\w]+$/', $_GET['pgtIou'])) {
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if (preg_match('/^[PT]GT-[\.\-\w]+$/', $_GET['pgtId'])) {
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$this->printHTMLHeader('phpCAS callback');
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$pgt_iou = $_GET['pgtIou'];
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$pgt = $_GET['pgtId'];
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phpCAS::trace('Storing PGT `'.$pgt.'\' (id=`'.$pgt_iou.'\')');
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echo '<p>Storing PGT `'.$pgt.'\' (id=`'.$pgt_iou.'\').</p>';
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$this->_storePGT($pgt, $pgt_iou);
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$this->printHTMLFooter();
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phpCAS::traceExit("Successfull Callback");
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} else {
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phpCAS::error('PGT format invalid' . $_GET['pgtId']);
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phpCAS::traceExit('PGT format invalid' . $_GET['pgtId']);
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}
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} else {
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phpCAS::error('PGTiou format invalid' . $_GET['pgtIou']);
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phpCAS::traceExit('PGTiou format invalid' . $_GET['pgtIou']);
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}
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// Flush the buffer to prevent from sending anything other then a 200
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// Success Status back to the CAS Server. The Exception would normally
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// report as a 500 error.
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flush();
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throw new CAS_GracefullTerminationException();
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}
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/** @} */
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// ########################################################################
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// PGT STORAGE
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// ########################################################################
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/**
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* @addtogroup internalPGTStorage
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* @{
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*/
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/**
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* @var CAS_PGTStorage_AbstractStorage
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* an instance of a class inheriting of PGTStorage, used to deal with PGT
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* storage. Created by CAS_Client::setPGTStorageFile(), used
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* by CAS_Client::setPGTStorageFile() and CAS_Client::_initPGTStorage().
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*
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* @hideinitializer
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*/
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private $_pgt_storage = null;
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/**
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* This method is used to initialize the storage of PGT's.
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* Halts on error.
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*
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* @return void
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*/
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private function _initPGTStorage()
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{
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// if no SetPGTStorageXxx() has been used, default to file
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if ( !is_object($this->_pgt_storage) ) {
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$this->setPGTStorageFile();
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}
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// initializes the storage
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$this->_pgt_storage->init();
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}
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/**
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* This method stores a PGT. Halts on error.
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*
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* @param string $pgt the PGT to store
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* @param string $pgt_iou its corresponding Iou
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*
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* @return void
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*/
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private function _storePGT($pgt,$pgt_iou)
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{
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// ensure that storage is initialized
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$this->_initPGTStorage();
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// writes the PGT
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$this->_pgt_storage->write($pgt, $pgt_iou);
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}
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/**
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* This method reads a PGT from its Iou and deletes the corresponding
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* storage entry.
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*
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* @param string $pgt_iou the PGT Iou
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*
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* @return string mul The PGT corresponding to the Iou, false when not found.
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*/
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private function _loadPGT($pgt_iou)
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{
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// ensure that storage is initialized
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$this->_initPGTStorage();
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// read the PGT
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return $this->_pgt_storage->read($pgt_iou);
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}
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/**
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* This method can be used to set a custom PGT storage object.
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*
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* @param CAS_PGTStorage_AbstractStorage $storage a PGT storage object that
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* inherits from the CAS_PGTStorage_AbstractStorage class
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*
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* @return void
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*/
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public function setPGTStorage($storage)
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{
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// Sequence validation
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$this->ensureIsProxy();
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// check that the storage has not already been set
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if ( is_object($this->_pgt_storage) ) {
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phpCAS::error('PGT storage already defined');
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}
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// check to make sure a valid storage object was specified
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if ( !($storage instanceof CAS_PGTStorage_AbstractStorage) )
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throw new CAS_TypeMismatchException($storage, '$storage', 'CAS_PGTStorage_AbstractStorage object');
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// store the PGTStorage object
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$this->_pgt_storage = $storage;
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}
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/**
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* This method is used to tell phpCAS to store the response of the
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* CAS server to PGT requests in a database.
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*
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* @param string|PDO $dsn_or_pdo a dsn string to use for creating a PDO
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* object or a PDO object
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* @param string $username the username to use when connecting to the
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* database
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* @param string $password the password to use when connecting to the
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* database
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* @param string $table the table to use for storing and retrieving
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* PGTs
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* @param string $driver_options any driver options to use when connecting
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* to the database
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*
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* @return void
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*/
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public function setPGTStorageDb(
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$dsn_or_pdo, $username='', $password='', $table='', $driver_options=null
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) {
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// Sequence validation
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$this->ensureIsProxy();
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// Argument validation
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if (!(is_object($dsn_or_pdo) && $dsn_or_pdo instanceof PDO) && !is_string($dsn_or_pdo))
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throw new CAS_TypeMismatchException($dsn_or_pdo, '$dsn_or_pdo', 'string or PDO object');
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if (gettype($username) != 'string')
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throw new CAS_TypeMismatchException($username, '$username', 'string');
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if (gettype($password) != 'string')
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throw new CAS_TypeMismatchException($password, '$password', 'string');
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if (gettype($table) != 'string')
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throw new CAS_TypeMismatchException($table, '$password', 'string');
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// create the storage object
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$this->setPGTStorage(
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new CAS_PGTStorage_Db(
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$this, $dsn_or_pdo, $username, $password, $table, $driver_options
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)
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);
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}
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|
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/**
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|
* This method is used to tell phpCAS to store the response of the
|
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* CAS server to PGT requests onto the filesystem.
|
|
*
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|
* @param string $path the path where the PGT's should be stored
|
|
*
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* @return void
|
|
*/
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public function setPGTStorageFile($path='')
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{
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// Sequence validation
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$this->ensureIsProxy();
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// Argument validation
|
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if (gettype($path) != 'string')
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throw new CAS_TypeMismatchException($path, '$path', 'string');
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|
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// create the storage object
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$this->setPGTStorage(new CAS_PGTStorage_File($this, $path));
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}
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// ########################################################################
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// PGT VALIDATION
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// ########################################################################
|
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/**
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|
* This method is used to validate a PGT; halt on failure.
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*
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* @param string &$validate_url the URL of the request to the CAS server.
|
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* @param string $text_response the response of the CAS server, as is
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|
* (XML text); result of
|
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* CAS_Client::validateCAS10() or
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* CAS_Client::validateCAS20().
|
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* @param DOMElement $tree_response the response of the CAS server, as a DOM XML
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|
* tree; result of CAS_Client::validateCAS10() or CAS_Client::validateCAS20().
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*
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* @return bool true when successfull and issue a CAS_AuthenticationException
|
|
* and false on an error
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*
|
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* @throws CAS_AuthenticationException
|
|
*/
|
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private function _validatePGT(&$validate_url,$text_response,$tree_response)
|
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{
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phpCAS::traceBegin();
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if ( $tree_response->getElementsByTagName("proxyGrantingTicket")->length == 0) {
|
|
phpCAS::trace('<proxyGrantingTicket> not found');
|
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// authentication succeded, but no PGT Iou was transmitted
|
|
throw new CAS_AuthenticationException(
|
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$this, 'Ticket validated but no PGT Iou transmitted',
|
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$validate_url, false/*$no_response*/, false/*$bad_response*/,
|
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$text_response
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);
|
|
} else {
|
|
// PGT Iou transmitted, extract it
|
|
$pgt_iou = trim(
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$tree_response->getElementsByTagName("proxyGrantingTicket")->item(0)->nodeValue
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);
|
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if (preg_match('/^PGTIOU-[\.\-\w]+$/', $pgt_iou)) {
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$pgt = $this->_loadPGT($pgt_iou);
|
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if ( $pgt == false ) {
|
|
phpCAS::trace('could not load PGT');
|
|
throw new CAS_AuthenticationException(
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$this,
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'PGT Iou was transmitted but PGT could not be retrieved',
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$validate_url, false/*$no_response*/,
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false/*$bad_response*/, $text_response
|
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);
|
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}
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$this->_setPGT($pgt);
|
|
} else {
|
|
phpCAS::trace('PGTiou format error');
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'PGT Iou was transmitted but has wrong format',
|
|
$validate_url, false/*$no_response*/, false/*$bad_response*/,
|
|
$text_response
|
|
);
|
|
}
|
|
}
|
|
phpCAS::traceEnd(true);
|
|
return true;
|
|
}
|
|
|
|
// ########################################################################
|
|
// PGT VALIDATION
|
|
// ########################################################################
|
|
|
|
/**
|
|
* This method is used to retrieve PT's from the CAS server thanks to a PGT.
|
|
*
|
|
* @param string $target_service the service to ask for with the PT.
|
|
* @param int &$err_code an error code (PHPCAS_SERVICE_OK on success).
|
|
* @param string &$err_msg an error message (empty on success).
|
|
*
|
|
* @return string|false a Proxy Ticket, or false on error.
|
|
*/
|
|
public function retrievePT($target_service,&$err_code,&$err_msg)
|
|
{
|
|
// Argument validation
|
|
if (gettype($target_service) != 'string')
|
|
throw new CAS_TypeMismatchException($target_service, '$target_service', 'string');
|
|
|
|
phpCAS::traceBegin();
|
|
|
|
// by default, $err_msg is set empty and $pt to true. On error, $pt is
|
|
// set to false and $err_msg to an error message. At the end, if $pt is false
|
|
// and $error_msg is still empty, it is set to 'invalid response' (the most
|
|
// commonly encountered error).
|
|
$err_msg = '';
|
|
|
|
// build the URL to retrieve the PT
|
|
$cas_url = $this->getServerProxyURL().'?targetService='
|
|
.urlencode($target_service).'&pgt='.$this->_getPGT();
|
|
|
|
// open and read the URL
|
|
if ( !$this->_readURL($cas_url, $headers, $cas_response, $err_msg) ) {
|
|
phpCAS::trace(
|
|
'could not open URL \''.$cas_url.'\' to validate ('.$err_msg.')'
|
|
);
|
|
$err_code = PHPCAS_SERVICE_PT_NO_SERVER_RESPONSE;
|
|
$err_msg = 'could not retrieve PT (no response from the CAS server)';
|
|
phpCAS::traceEnd(false);
|
|
return false;
|
|
}
|
|
|
|
$bad_response = false;
|
|
|
|
// create new DOMDocument object
|
|
$dom = new DOMDocument();
|
|
// Fix possible whitspace problems
|
|
$dom->preserveWhiteSpace = false;
|
|
// read the response of the CAS server into a DOM object
|
|
if ( !($dom->loadXML($cas_response))) {
|
|
phpCAS::trace('dom->loadXML() failed');
|
|
// read failed
|
|
$bad_response = true;
|
|
}
|
|
|
|
if ( !$bad_response ) {
|
|
// read the root node of the XML tree
|
|
if ( !($root = $dom->documentElement) ) {
|
|
phpCAS::trace('documentElement failed');
|
|
// read failed
|
|
$bad_response = true;
|
|
}
|
|
}
|
|
|
|
if ( !$bad_response ) {
|
|
// insure that tag name is 'serviceResponse'
|
|
if ( $root->localName != 'serviceResponse' ) {
|
|
phpCAS::trace('localName failed');
|
|
// bad root node
|
|
$bad_response = true;
|
|
}
|
|
}
|
|
|
|
if ( !$bad_response ) {
|
|
// look for a proxySuccess tag
|
|
if ( $root->getElementsByTagName("proxySuccess")->length != 0) {
|
|
$proxy_success_list = $root->getElementsByTagName("proxySuccess");
|
|
|
|
// authentication succeded, look for a proxyTicket tag
|
|
if ( $proxy_success_list->item(0)->getElementsByTagName("proxyTicket")->length != 0) {
|
|
$err_code = PHPCAS_SERVICE_OK;
|
|
$err_msg = '';
|
|
$pt = trim(
|
|
$proxy_success_list->item(0)->getElementsByTagName("proxyTicket")->item(0)->nodeValue
|
|
);
|
|
phpCAS::trace('original PT: '.trim($pt));
|
|
phpCAS::traceEnd($pt);
|
|
return $pt;
|
|
} else {
|
|
phpCAS::trace('<proxySuccess> was found, but not <proxyTicket>');
|
|
}
|
|
} else if ($root->getElementsByTagName("proxyFailure")->length != 0) {
|
|
// look for a proxyFailure tag
|
|
$proxy_failure_list = $root->getElementsByTagName("proxyFailure");
|
|
|
|
// authentication failed, extract the error
|
|
$err_code = PHPCAS_SERVICE_PT_FAILURE;
|
|
$err_msg = 'PT retrieving failed (code=`'
|
|
.$proxy_failure_list->item(0)->getAttribute('code')
|
|
.'\', message=`'
|
|
.trim($proxy_failure_list->item(0)->nodeValue)
|
|
.'\')';
|
|
phpCAS::traceEnd(false);
|
|
return false;
|
|
} else {
|
|
phpCAS::trace('neither <proxySuccess> nor <proxyFailure> found');
|
|
}
|
|
}
|
|
|
|
// at this step, we are sure that the response of the CAS server was
|
|
// illformed
|
|
$err_code = PHPCAS_SERVICE_PT_BAD_SERVER_RESPONSE;
|
|
$err_msg = 'Invalid response from the CAS server (response=`'
|
|
.$cas_response.'\')';
|
|
|
|
phpCAS::traceEnd(false);
|
|
return false;
|
|
}
|
|
|
|
/** @} */
|
|
|
|
// ########################################################################
|
|
// READ CAS SERVER ANSWERS
|
|
// ########################################################################
|
|
|
|
/**
|
|
* @addtogroup internalMisc
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* This method is used to acces a remote URL.
|
|
*
|
|
* @param string $url the URL to access.
|
|
* @param string &$headers an array containing the HTTP header lines of the
|
|
* response (an empty array on failure).
|
|
* @param string &$body the body of the response, as a string (empty on
|
|
* failure).
|
|
* @param string &$err_msg an error message, filled on failure.
|
|
*
|
|
* @return bool true on success, false otherwise (in this later case, $err_msg
|
|
* contains an error message).
|
|
*/
|
|
private function _readURL($url, &$headers, &$body, &$err_msg)
|
|
{
|
|
phpCAS::traceBegin();
|
|
$className = $this->_requestImplementation;
|
|
$request = new $className();
|
|
|
|
if (count($this->_curl_options)) {
|
|
$request->setCurlOptions($this->_curl_options);
|
|
}
|
|
|
|
$request->setUrl($url);
|
|
|
|
if (empty($this->_cas_server_ca_cert) && !$this->_no_cas_server_validation) {
|
|
phpCAS::error(
|
|
'one of the methods phpCAS::setCasServerCACert() or phpCAS::setNoCasServerValidation() must be called.'
|
|
);
|
|
}
|
|
if ($this->_cas_server_ca_cert != '') {
|
|
$request->setSslCaCert(
|
|
$this->_cas_server_ca_cert, $this->_cas_server_cn_validate
|
|
);
|
|
}
|
|
|
|
// add extra stuff if SAML
|
|
if ($this->getServerVersion() == SAML_VERSION_1_1) {
|
|
$request->addHeader("soapaction: http://www.oasis-open.org/committees/security");
|
|
$request->addHeader("cache-control: no-cache");
|
|
$request->addHeader("pragma: no-cache");
|
|
$request->addHeader("accept: text/xml");
|
|
$request->addHeader("connection: keep-alive");
|
|
$request->addHeader("content-type: text/xml");
|
|
$request->makePost();
|
|
$request->setPostBody($this->_buildSAMLPayload());
|
|
}
|
|
|
|
if ($request->send()) {
|
|
$headers = $request->getResponseHeaders();
|
|
$body = $request->getResponseBody();
|
|
$err_msg = '';
|
|
phpCAS::traceEnd(true);
|
|
return true;
|
|
} else {
|
|
$headers = '';
|
|
$body = '';
|
|
$err_msg = $request->getErrorMessage();
|
|
phpCAS::traceEnd(false);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This method is used to build the SAML POST body sent to /samlValidate URL.
|
|
*
|
|
* @return string the SOAP-encased SAMLP artifact (the ticket).
|
|
*/
|
|
private function _buildSAMLPayload()
|
|
{
|
|
phpCAS::traceBegin();
|
|
|
|
//get the ticket
|
|
$sa = urlencode($this->getTicket());
|
|
|
|
$body = SAML_SOAP_ENV.SAML_SOAP_BODY.SAMLP_REQUEST
|
|
.SAML_ASSERTION_ARTIFACT.$sa.SAML_ASSERTION_ARTIFACT_CLOSE
|
|
.SAMLP_REQUEST_CLOSE.SAML_SOAP_BODY_CLOSE.SAML_SOAP_ENV_CLOSE;
|
|
|
|
phpCAS::traceEnd($body);
|
|
return ($body);
|
|
}
|
|
|
|
/** @} **/
|
|
|
|
// ########################################################################
|
|
// ACCESS TO EXTERNAL SERVICES
|
|
// ########################################################################
|
|
|
|
/**
|
|
* @addtogroup internalProxyServices
|
|
* @{
|
|
*/
|
|
|
|
|
|
/**
|
|
* Answer a proxy-authenticated service handler.
|
|
*
|
|
* @param string $type The service type. One of:
|
|
* PHPCAS_PROXIED_SERVICE_HTTP_GET, PHPCAS_PROXIED_SERVICE_HTTP_POST,
|
|
* PHPCAS_PROXIED_SERVICE_IMAP
|
|
*
|
|
* @return CAS_ProxiedService
|
|
* @throws InvalidArgumentException If the service type is unknown.
|
|
*/
|
|
public function getProxiedService ($type)
|
|
{
|
|
// Sequence validation
|
|
$this->ensureIsProxy();
|
|
$this->ensureAuthenticationCallSuccessful();
|
|
|
|
// Argument validation
|
|
if (gettype($type) != 'string')
|
|
throw new CAS_TypeMismatchException($type, '$type', 'string');
|
|
|
|
switch ($type) {
|
|
case PHPCAS_PROXIED_SERVICE_HTTP_GET:
|
|
case PHPCAS_PROXIED_SERVICE_HTTP_POST:
|
|
$requestClass = $this->_requestImplementation;
|
|
$request = new $requestClass();
|
|
if (count($this->_curl_options)) {
|
|
$request->setCurlOptions($this->_curl_options);
|
|
}
|
|
$proxiedService = new $type($request, $this->_serviceCookieJar);
|
|
if ($proxiedService instanceof CAS_ProxiedService_Testable) {
|
|
$proxiedService->setCasClient($this);
|
|
}
|
|
return $proxiedService;
|
|
case PHPCAS_PROXIED_SERVICE_IMAP;
|
|
$proxiedService = new CAS_ProxiedService_Imap($this->_getUser());
|
|
if ($proxiedService instanceof CAS_ProxiedService_Testable) {
|
|
$proxiedService->setCasClient($this);
|
|
}
|
|
return $proxiedService;
|
|
default:
|
|
throw new CAS_InvalidArgumentException(
|
|
"Unknown proxied-service type, $type."
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Initialize a proxied-service handler with the proxy-ticket it should use.
|
|
*
|
|
* @param CAS_ProxiedService $proxiedService service handler
|
|
*
|
|
* @return void
|
|
*
|
|
* @throws CAS_ProxyTicketException If there is a proxy-ticket failure.
|
|
* The code of the Exception will be one of:
|
|
* PHPCAS_SERVICE_PT_NO_SERVER_RESPONSE
|
|
* PHPCAS_SERVICE_PT_BAD_SERVER_RESPONSE
|
|
* PHPCAS_SERVICE_PT_FAILURE
|
|
* @throws CAS_ProxiedService_Exception If there is a failure getting the
|
|
* url from the proxied service.
|
|
*/
|
|
public function initializeProxiedService (CAS_ProxiedService $proxiedService)
|
|
{
|
|
// Sequence validation
|
|
$this->ensureIsProxy();
|
|
$this->ensureAuthenticationCallSuccessful();
|
|
|
|
$url = $proxiedService->getServiceUrl();
|
|
if (!is_string($url)) {
|
|
throw new CAS_ProxiedService_Exception(
|
|
"Proxied Service ".get_class($proxiedService)
|
|
."->getServiceUrl() should have returned a string, returned a "
|
|
.gettype($url)." instead."
|
|
);
|
|
}
|
|
$pt = $this->retrievePT($url, $err_code, $err_msg);
|
|
if (!$pt) {
|
|
throw new CAS_ProxyTicketException($err_msg, $err_code);
|
|
}
|
|
$proxiedService->setProxyTicket($pt);
|
|
}
|
|
|
|
/**
|
|
* This method is used to access an HTTP[S] service.
|
|
*
|
|
* @param string $url the service to access.
|
|
* @param int &$err_code an error code Possible values are
|
|
* PHPCAS_SERVICE_OK (on success), PHPCAS_SERVICE_PT_NO_SERVER_RESPONSE,
|
|
* PHPCAS_SERVICE_PT_BAD_SERVER_RESPONSE, PHPCAS_SERVICE_PT_FAILURE,
|
|
* PHPCAS_SERVICE_NOT_AVAILABLE.
|
|
* @param string &$output the output of the service (also used to give an error
|
|
* message on failure).
|
|
*
|
|
* @return bool true on success, false otherwise (in this later case, $err_code
|
|
* gives the reason why it failed and $output contains an error message).
|
|
*/
|
|
public function serviceWeb($url,&$err_code,&$output)
|
|
{
|
|
// Sequence validation
|
|
$this->ensureIsProxy();
|
|
$this->ensureAuthenticationCallSuccessful();
|
|
|
|
// Argument validation
|
|
if (gettype($url) != 'string')
|
|
throw new CAS_TypeMismatchException($url, '$url', 'string');
|
|
|
|
try {
|
|
$service = $this->getProxiedService(PHPCAS_PROXIED_SERVICE_HTTP_GET);
|
|
$service->setUrl($url);
|
|
$service->send();
|
|
$output = $service->getResponseBody();
|
|
$err_code = PHPCAS_SERVICE_OK;
|
|
return true;
|
|
} catch (CAS_ProxyTicketException $e) {
|
|
$err_code = $e->getCode();
|
|
$output = $e->getMessage();
|
|
return false;
|
|
} catch (CAS_ProxiedService_Exception $e) {
|
|
$lang = $this->getLangObj();
|
|
$output = sprintf(
|
|
$lang->getServiceUnavailable(), $url, $e->getMessage()
|
|
);
|
|
$err_code = PHPCAS_SERVICE_NOT_AVAILABLE;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This method is used to access an IMAP/POP3/NNTP service.
|
|
*
|
|
* @param string $url a string giving the URL of the service, including
|
|
* the mailing box for IMAP URLs, as accepted by imap_open().
|
|
* @param string $serviceUrl a string giving for CAS retrieve Proxy ticket
|
|
* @param string $flags options given to imap_open().
|
|
* @param int &$err_code an error code Possible values are
|
|
* PHPCAS_SERVICE_OK (on success), PHPCAS_SERVICE_PT_NO_SERVER_RESPONSE,
|
|
* PHPCAS_SERVICE_PT_BAD_SERVER_RESPONSE, PHPCAS_SERVICE_PT_FAILURE,
|
|
* PHPCAS_SERVICE_NOT_AVAILABLE.
|
|
* @param string &$err_msg an error message on failure
|
|
* @param string &$pt the Proxy Ticket (PT) retrieved from the CAS
|
|
* server to access the URL on success, false on error).
|
|
*
|
|
* @return object|false an IMAP stream on success, false otherwise (in this later
|
|
* case, $err_code gives the reason why it failed and $err_msg contains an
|
|
* error message).
|
|
*/
|
|
public function serviceMail($url,$serviceUrl,$flags,&$err_code,&$err_msg,&$pt)
|
|
{
|
|
// Sequence validation
|
|
$this->ensureIsProxy();
|
|
$this->ensureAuthenticationCallSuccessful();
|
|
|
|
// Argument validation
|
|
if (gettype($url) != 'string')
|
|
throw new CAS_TypeMismatchException($url, '$url', 'string');
|
|
if (gettype($serviceUrl) != 'string')
|
|
throw new CAS_TypeMismatchException($serviceUrl, '$serviceUrl', 'string');
|
|
if (gettype($flags) != 'integer')
|
|
throw new CAS_TypeMismatchException($flags, '$flags', 'string');
|
|
|
|
try {
|
|
$service = $this->getProxiedService(PHPCAS_PROXIED_SERVICE_IMAP);
|
|
$service->setServiceUrl($serviceUrl);
|
|
$service->setMailbox($url);
|
|
$service->setOptions($flags);
|
|
|
|
$stream = $service->open();
|
|
$err_code = PHPCAS_SERVICE_OK;
|
|
$pt = $service->getImapProxyTicket();
|
|
return $stream;
|
|
} catch (CAS_ProxyTicketException $e) {
|
|
$err_msg = $e->getMessage();
|
|
$err_code = $e->getCode();
|
|
$pt = false;
|
|
return false;
|
|
} catch (CAS_ProxiedService_Exception $e) {
|
|
$lang = $this->getLangObj();
|
|
$err_msg = sprintf(
|
|
$lang->getServiceUnavailable(),
|
|
$url,
|
|
$e->getMessage()
|
|
);
|
|
$err_code = PHPCAS_SERVICE_NOT_AVAILABLE;
|
|
$pt = false;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/** @} **/
|
|
|
|
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
|
|
// XX XX
|
|
// XX PROXIED CLIENT FEATURES (CAS 2.0) XX
|
|
// XX XX
|
|
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
|
|
|
|
// ########################################################################
|
|
// PT
|
|
// ########################################################################
|
|
/**
|
|
* @addtogroup internalService
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* This array will store a list of proxies in front of this application. This
|
|
* property will only be populated if this script is being proxied rather than
|
|
* accessed directly.
|
|
*
|
|
* It is set in CAS_Client::validateCAS20() and can be read by
|
|
* CAS_Client::getProxies()
|
|
*
|
|
* @access private
|
|
*/
|
|
private $_proxies = array();
|
|
|
|
/**
|
|
* Answer an array of proxies that are sitting in front of this application.
|
|
*
|
|
* This method will only return a non-empty array if we have received and
|
|
* validated a Proxy Ticket.
|
|
*
|
|
* @return array
|
|
* @access public
|
|
*/
|
|
public function getProxies()
|
|
{
|
|
return $this->_proxies;
|
|
}
|
|
|
|
/**
|
|
* Set the Proxy array, probably from persistant storage.
|
|
*
|
|
* @param array $proxies An array of proxies
|
|
*
|
|
* @return void
|
|
* @access private
|
|
*/
|
|
private function _setProxies($proxies)
|
|
{
|
|
$this->_proxies = $proxies;
|
|
if (!empty($proxies)) {
|
|
// For proxy-authenticated requests people are not viewing the URL
|
|
// directly since the client is another application making a
|
|
// web-service call.
|
|
// Because of this, stripping the ticket from the URL is unnecessary
|
|
// and causes another web-service request to be performed. Additionally,
|
|
// if session handling on either the client or the server malfunctions
|
|
// then the subsequent request will not complete successfully.
|
|
$this->setNoClearTicketsFromUrl();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A container of patterns to be allowed as proxies in front of the cas client.
|
|
*
|
|
* @var CAS_ProxyChain_AllowedList
|
|
*/
|
|
private $_allowed_proxy_chains;
|
|
|
|
/**
|
|
* Answer the CAS_ProxyChain_AllowedList object for this client.
|
|
*
|
|
* @return CAS_ProxyChain_AllowedList
|
|
*/
|
|
public function getAllowedProxyChains ()
|
|
{
|
|
if (empty($this->_allowed_proxy_chains)) {
|
|
$this->_allowed_proxy_chains = new CAS_ProxyChain_AllowedList();
|
|
}
|
|
return $this->_allowed_proxy_chains;
|
|
}
|
|
|
|
/** @} */
|
|
// ########################################################################
|
|
// PT VALIDATION
|
|
// ########################################################################
|
|
/**
|
|
* @addtogroup internalProxied
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* This method is used to validate a cas 2.0 ST or PT; halt on failure
|
|
* Used for all CAS 2.0 validations
|
|
*
|
|
* @param string &$validate_url the url of the reponse
|
|
* @param string &$text_response the text of the repsones
|
|
* @param DOMElement &$tree_response the domxml tree of the respones
|
|
* @param bool $renew true to force the authentication with the CAS server
|
|
*
|
|
* @return bool true when successfull and issue a CAS_AuthenticationException
|
|
* and false on an error
|
|
*
|
|
* @throws CAS_AuthenticationException
|
|
*/
|
|
public function validateCAS20(&$validate_url,&$text_response,&$tree_response, $renew=false)
|
|
{
|
|
phpCAS::traceBegin();
|
|
phpCAS::trace($text_response);
|
|
// build the URL to validate the ticket
|
|
if ($this->getAllowedProxyChains()->isProxyingAllowed()) {
|
|
$validate_url = $this->getServerProxyValidateURL().'&ticket='
|
|
.urlencode($this->getTicket());
|
|
} else {
|
|
$validate_url = $this->getServerServiceValidateURL().'&ticket='
|
|
.urlencode($this->getTicket());
|
|
}
|
|
|
|
if ( $this->isProxy() ) {
|
|
// pass the callback url for CAS proxies
|
|
$validate_url .= '&pgtUrl='.urlencode($this->_getCallbackURL());
|
|
}
|
|
|
|
if ( $renew ) {
|
|
// pass the renew
|
|
$validate_url .= '&renew=true';
|
|
}
|
|
|
|
// open and read the URL
|
|
if ( !$this->_readURL($validate_url, $headers, $text_response, $err_msg) ) {
|
|
phpCAS::trace(
|
|
'could not open URL \''.$validate_url.'\' to validate ('.$err_msg.')'
|
|
);
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'Ticket not validated', $validate_url,
|
|
true/*$no_response*/
|
|
);
|
|
}
|
|
|
|
// create new DOMDocument object
|
|
$dom = new DOMDocument();
|
|
// Fix possible whitspace problems
|
|
$dom->preserveWhiteSpace = false;
|
|
// CAS servers should only return data in utf-8
|
|
$dom->encoding = "utf-8";
|
|
// read the response of the CAS server into a DOMDocument object
|
|
if ( !($dom->loadXML($text_response))) {
|
|
// read failed
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'Ticket not validated', $validate_url,
|
|
false/*$no_response*/, true/*$bad_response*/, $text_response
|
|
);
|
|
} else if ( !($tree_response = $dom->documentElement) ) {
|
|
// read the root node of the XML tree
|
|
// read failed
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'Ticket not validated', $validate_url,
|
|
false/*$no_response*/, true/*$bad_response*/, $text_response
|
|
);
|
|
} else if ($tree_response->localName != 'serviceResponse') {
|
|
// insure that tag name is 'serviceResponse'
|
|
// bad root node
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'Ticket not validated', $validate_url,
|
|
false/*$no_response*/, true/*$bad_response*/, $text_response
|
|
);
|
|
} else if ( $tree_response->getElementsByTagName("authenticationFailure")->length != 0) {
|
|
// authentication failed, extract the error code and message and throw exception
|
|
$auth_fail_list = $tree_response
|
|
->getElementsByTagName("authenticationFailure");
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'Ticket not validated', $validate_url,
|
|
false/*$no_response*/, false/*$bad_response*/,
|
|
$text_response,
|
|
$auth_fail_list->item(0)->getAttribute('code')/*$err_code*/,
|
|
trim($auth_fail_list->item(0)->nodeValue)/*$err_msg*/
|
|
);
|
|
} else if ($tree_response->getElementsByTagName("authenticationSuccess")->length != 0) {
|
|
// authentication succeded, extract the user name
|
|
$success_elements = $tree_response
|
|
->getElementsByTagName("authenticationSuccess");
|
|
if ( $success_elements->item(0)->getElementsByTagName("user")->length == 0) {
|
|
// no user specified => error
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'Ticket not validated', $validate_url,
|
|
false/*$no_response*/, true/*$bad_response*/, $text_response
|
|
);
|
|
} else {
|
|
$this->_setUser(
|
|
trim(
|
|
$success_elements->item(0)->getElementsByTagName("user")->item(0)->nodeValue
|
|
)
|
|
);
|
|
$this->_readExtraAttributesCas20($success_elements);
|
|
// Store the proxies we are sitting behind for authorization checking
|
|
$proxyList = array();
|
|
if ( sizeof($arr = $success_elements->item(0)->getElementsByTagName("proxy")) > 0) {
|
|
foreach ($arr as $proxyElem) {
|
|
phpCAS::trace("Found Proxy: ".$proxyElem->nodeValue);
|
|
$proxyList[] = trim($proxyElem->nodeValue);
|
|
}
|
|
$this->_setProxies($proxyList);
|
|
phpCAS::trace("Storing Proxy List");
|
|
}
|
|
// Check if the proxies in front of us are allowed
|
|
if (!$this->getAllowedProxyChains()->isProxyListAllowed($proxyList)) {
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'Proxy not allowed', $validate_url,
|
|
false/*$no_response*/, true/*$bad_response*/,
|
|
$text_response
|
|
);
|
|
} else {
|
|
$result = true;
|
|
}
|
|
}
|
|
} else {
|
|
throw new CAS_AuthenticationException(
|
|
$this, 'Ticket not validated', $validate_url,
|
|
false/*$no_response*/, true/*$bad_response*/,
|
|
$text_response
|
|
);
|
|
}
|
|
|
|
$this->_renameSession($this->getTicket());
|
|
|
|
// at this step, Ticket has been validated and $this->_user has been set,
|
|
|
|
phpCAS::traceEnd($result);
|
|
return $result;
|
|
}
|
|
|
|
|
|
/**
|
|
* This method will parse the DOM and pull out the attributes from the XML
|
|
* payload and put them into an array, then put the array into the session.
|
|
*
|
|
* @param DOMNodeList $success_elements payload of the response
|
|
*
|
|
* @return bool true when successfull, halt otherwise by calling
|
|
* CAS_Client::_authError().
|
|
*/
|
|
private function _readExtraAttributesCas20($success_elements)
|
|
{
|
|
phpCAS::traceBegin();
|
|
|
|
$extra_attributes = array();
|
|
|
|
// "Jasig Style" Attributes:
|
|
//
|
|
// <cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'>
|
|
// <cas:authenticationSuccess>
|
|
// <cas:user>jsmith</cas:user>
|
|
// <cas:attributes>
|
|
// <cas:attraStyle>RubyCAS</cas:attraStyle>
|
|
// <cas:surname>Smith</cas:surname>
|
|
// <cas:givenName>John</cas:givenName>
|
|
// <cas:memberOf>CN=Staff,OU=Groups,DC=example,DC=edu</cas:memberOf>
|
|
// <cas:memberOf>CN=Spanish Department,OU=Departments,OU=Groups,DC=example,DC=edu</cas:memberOf>
|
|
// </cas:attributes>
|
|
// <cas:proxyGrantingTicket>PGTIOU-84678-8a9d2sfa23casd</cas:proxyGrantingTicket>
|
|
// </cas:authenticationSuccess>
|
|
// </cas:serviceResponse>
|
|
//
|
|
if ($this->_casAttributeParserCallbackFunction !== null
|
|
&& is_callable($this->_casAttributeParserCallbackFunction)
|
|
) {
|
|
array_unshift($this->_casAttributeParserCallbackArgs, $success_elements->item(0));
|
|
phpCAS :: trace("Calling attritubeParser callback");
|
|
$extra_attributes = call_user_func_array(
|
|
$this->_casAttributeParserCallbackFunction,
|
|
$this->_casAttributeParserCallbackArgs
|
|
);
|
|
} elseif ( $success_elements->item(0)->getElementsByTagName("attributes")->length != 0) {
|
|
$attr_nodes = $success_elements->item(0)
|
|
->getElementsByTagName("attributes");
|
|
phpCAS :: trace("Found nested jasig style attributes");
|
|
if ($attr_nodes->item(0)->hasChildNodes()) {
|
|
// Nested Attributes
|
|
foreach ($attr_nodes->item(0)->childNodes as $attr_child) {
|
|
phpCAS :: trace(
|
|
"Attribute [".$attr_child->localName."] = "
|
|
.$attr_child->nodeValue
|
|
);
|
|
$this->_addAttributeToArray(
|
|
$extra_attributes, $attr_child->localName,
|
|
$attr_child->nodeValue
|
|
);
|
|
}
|
|
}
|
|
} else {
|
|
// "RubyCAS Style" attributes
|
|
//
|
|
// <cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'>
|
|
// <cas:authenticationSuccess>
|
|
// <cas:user>jsmith</cas:user>
|
|
//
|
|
// <cas:attraStyle>RubyCAS</cas:attraStyle>
|
|
// <cas:surname>Smith</cas:surname>
|
|
// <cas:givenName>John</cas:givenName>
|
|
// <cas:memberOf>CN=Staff,OU=Groups,DC=example,DC=edu</cas:memberOf>
|
|
// <cas:memberOf>CN=Spanish Department,OU=Departments,OU=Groups,DC=example,DC=edu</cas:memberOf>
|
|
//
|
|
// <cas:proxyGrantingTicket>PGTIOU-84678-8a9d2sfa23casd</cas:proxyGrantingTicket>
|
|
// </cas:authenticationSuccess>
|
|
// </cas:serviceResponse>
|
|
//
|
|
phpCAS :: trace("Testing for rubycas style attributes");
|
|
$childnodes = $success_elements->item(0)->childNodes;
|
|
foreach ($childnodes as $attr_node) {
|
|
switch ($attr_node->localName) {
|
|
case 'user':
|
|
case 'proxies':
|
|
case 'proxyGrantingTicket':
|
|
break;
|
|
default:
|
|
if (strlen(trim($attr_node->nodeValue))) {
|
|
phpCAS :: trace(
|
|
"Attribute [".$attr_node->localName."] = ".$attr_node->nodeValue
|
|
);
|
|
$this->_addAttributeToArray(
|
|
$extra_attributes, $attr_node->localName,
|
|
$attr_node->nodeValue
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// "Name-Value" attributes.
|
|
//
|
|
// Attribute format from these mailing list thread:
|
|
// http://jasig.275507.n4.nabble.com/CAS-attributes-and-how-they-appear-in-the-CAS-response-td264272.html
|
|
// Note: This is a less widely used format, but in use by at least two institutions.
|
|
//
|
|
// <cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'>
|
|
// <cas:authenticationSuccess>
|
|
// <cas:user>jsmith</cas:user>
|
|
//
|
|
// <cas:attribute name='attraStyle' value='Name-Value' />
|
|
// <cas:attribute name='surname' value='Smith' />
|
|
// <cas:attribute name='givenName' value='John' />
|
|
// <cas:attribute name='memberOf' value='CN=Staff,OU=Groups,DC=example,DC=edu' />
|
|
// <cas:attribute name='memberOf' value='CN=Spanish Department,OU=Departments,OU=Groups,DC=example,DC=edu' />
|
|
//
|
|
// <cas:proxyGrantingTicket>PGTIOU-84678-8a9d2sfa23casd</cas:proxyGrantingTicket>
|
|
// </cas:authenticationSuccess>
|
|
// </cas:serviceResponse>
|
|
//
|
|
if (!count($extra_attributes)
|
|
&& $success_elements->item(0)->getElementsByTagName("attribute")->length != 0
|
|
) {
|
|
$attr_nodes = $success_elements->item(0)
|
|
->getElementsByTagName("attribute");
|
|
$firstAttr = $attr_nodes->item(0);
|
|
if (!$firstAttr->hasChildNodes()
|
|
&& $firstAttr->hasAttribute('name')
|
|
&& $firstAttr->hasAttribute('value')
|
|
) {
|
|
phpCAS :: trace("Found Name-Value style attributes");
|
|
// Nested Attributes
|
|
foreach ($attr_nodes as $attr_node) {
|
|
if ($attr_node->hasAttribute('name')
|
|
&& $attr_node->hasAttribute('value')
|
|
) {
|
|
phpCAS :: trace(
|
|
"Attribute [".$attr_node->getAttribute('name')
|
|
."] = ".$attr_node->getAttribute('value')
|
|
);
|
|
$this->_addAttributeToArray(
|
|
$extra_attributes, $attr_node->getAttribute('name'),
|
|
$attr_node->getAttribute('value')
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
$this->setAttributes($extra_attributes);
|
|
phpCAS::traceEnd();
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Add an attribute value to an array of attributes.
|
|
*
|
|
* @param array &$attributeArray reference to array
|
|
* @param string $name name of attribute
|
|
* @param string $value value of attribute
|
|
*
|
|
* @return void
|
|
*/
|
|
private function _addAttributeToArray(array &$attributeArray, $name, $value)
|
|
{
|
|
// If multiple attributes exist, add as an array value
|
|
if (isset($attributeArray[$name])) {
|
|
// Initialize the array with the existing value
|
|
if (!is_array($attributeArray[$name])) {
|
|
$existingValue = $attributeArray[$name];
|
|
$attributeArray[$name] = array($existingValue);
|
|
}
|
|
|
|
$attributeArray[$name][] = trim($value);
|
|
} else {
|
|
$attributeArray[$name] = trim($value);
|
|
}
|
|
}
|
|
|
|
/** @} */
|
|
|
|
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
|
|
// XX XX
|
|
// XX MISC XX
|
|
// XX XX
|
|
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
|
|
|
|
/**
|
|
* @addtogroup internalMisc
|
|
* @{
|
|
*/
|
|
|
|
// ########################################################################
|
|
// URL
|
|
// ########################################################################
|
|
/**
|
|
* the URL of the current request (without any ticket CGI parameter). Written
|
|
* and read by CAS_Client::getURL().
|
|
*
|
|
* @hideinitializer
|
|
*/
|
|
private $_url = '';
|
|
|
|
|
|
/**
|
|
* This method sets the URL of the current request
|
|
*
|
|
* @param string $url url to set for service
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setURL($url)
|
|
{
|
|
// Argument Validation
|
|
if (gettype($url) != 'string')
|
|
throw new CAS_TypeMismatchException($url, '$url', 'string');
|
|
|
|
$this->_url = $url;
|
|
}
|
|
|
|
/**
|
|
* This method returns the URL of the current request (without any ticket
|
|
* CGI parameter).
|
|
*
|
|
* @return string The URL
|
|
*/
|
|
public function getURL()
|
|
{
|
|
phpCAS::traceBegin();
|
|
// the URL is built when needed only
|
|
if ( empty($this->_url) ) {
|
|
// remove the ticket if present in the URL
|
|
$final_uri = ($this->_isHttps()) ? 'https' : 'http';
|
|
$final_uri .= '://';
|
|
|
|
$final_uri .= $this->_getClientUrl();
|
|
$request_uri = explode('?', $_SERVER['REQUEST_URI'], 2);
|
|
$final_uri .= $request_uri[0];
|
|
|
|
if (isset($request_uri[1]) && $request_uri[1]) {
|
|
$query_string= $this->_removeParameterFromQueryString('ticket', $request_uri[1]);
|
|
|
|
// If the query string still has anything left,
|
|
// append it to the final URI
|
|
if ($query_string !== '') {
|
|
$final_uri .= "?$query_string";
|
|
}
|
|
}
|
|
|
|
phpCAS::trace("Final URI: $final_uri");
|
|
$this->setURL($final_uri);
|
|
}
|
|
phpCAS::traceEnd($this->_url);
|
|
return $this->_url;
|
|
}
|
|
|
|
/**
|
|
* This method sets the base URL of the CAS server.
|
|
*
|
|
* @param string $url the base URL
|
|
*
|
|
* @return string base url
|
|
*/
|
|
public function setBaseURL($url)
|
|
{
|
|
// Argument Validation
|
|
if (gettype($url) != 'string')
|
|
throw new CAS_TypeMismatchException($url, '$url', 'string');
|
|
|
|
return $this->_server['base_url'] = $url;
|
|
}
|
|
|
|
|
|
/**
|
|
* Try to figure out the phpCAS client URL with possible Proxys / Ports etc.
|
|
*
|
|
* @return string Server URL with domain:port
|
|
*/
|
|
private function _getClientUrl()
|
|
{
|
|
if (!empty($_SERVER['HTTP_X_FORWARDED_HOST'])) {
|
|
// explode the host list separated by comma and use the first host
|
|
$hosts = explode(',', $_SERVER['HTTP_X_FORWARDED_HOST']);
|
|
// see rfc7239#5.3 and rfc7230#2.7.1: port is in HTTP_X_FORWARDED_HOST if non default
|
|
return $hosts[0];
|
|
} else if (!empty($_SERVER['HTTP_X_FORWARDED_SERVER'])) {
|
|
$server_url = $_SERVER['HTTP_X_FORWARDED_SERVER'];
|
|
} else {
|
|
if (empty($_SERVER['SERVER_NAME'])) {
|
|
$server_url = $_SERVER['HTTP_HOST'];
|
|
} else {
|
|
$server_url = $_SERVER['SERVER_NAME'];
|
|
}
|
|
}
|
|
if (!strpos($server_url, ':')) {
|
|
if (empty($_SERVER['HTTP_X_FORWARDED_PORT'])) {
|
|
$server_port = $_SERVER['SERVER_PORT'];
|
|
} else {
|
|
$ports = explode(',', $_SERVER['HTTP_X_FORWARDED_PORT']);
|
|
$server_port = $ports[0];
|
|
}
|
|
|
|
if ( ($this->_isHttps() && $server_port!=443)
|
|
|| (!$this->_isHttps() && $server_port!=80)
|
|
) {
|
|
$server_url .= ':';
|
|
$server_url .= $server_port;
|
|
}
|
|
}
|
|
return $server_url;
|
|
}
|
|
|
|
/**
|
|
* This method checks to see if the request is secured via HTTPS
|
|
*
|
|
* @return bool true if https, false otherwise
|
|
*/
|
|
private function _isHttps()
|
|
{
|
|
if (!empty($_SERVER['HTTP_X_FORWARDED_PROTO'])) {
|
|
return ($_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https');
|
|
} elseif (!empty($_SERVER['HTTP_X_FORWARDED_PROTOCOL'])) {
|
|
return ($_SERVER['HTTP_X_FORWARDED_PROTOCOL'] === 'https');
|
|
} elseif ( isset($_SERVER['HTTPS'])
|
|
&& !empty($_SERVER['HTTPS'])
|
|
&& strcasecmp($_SERVER['HTTPS'], 'off') !== 0
|
|
) {
|
|
return true;
|
|
}
|
|
return false;
|
|
|
|
}
|
|
|
|
/**
|
|
* Removes a parameter from a query string
|
|
*
|
|
* @param string $parameterName name of parameter
|
|
* @param string $queryString query string
|
|
*
|
|
* @return string new query string
|
|
*
|
|
* @link http://stackoverflow.com/questions/1842681/regular-expression-to-remove-one-parameter-from-query-string
|
|
*/
|
|
private function _removeParameterFromQueryString($parameterName, $queryString)
|
|
{
|
|
$parameterName = preg_quote($parameterName);
|
|
return preg_replace(
|
|
"/&$parameterName(=[^&]*)?|^$parameterName(=[^&]*)?&?/",
|
|
'', $queryString
|
|
);
|
|
}
|
|
|
|
/**
|
|
* This method is used to append query parameters to an url. Since the url
|
|
* might already contain parameter it has to be detected and to build a proper
|
|
* URL
|
|
*
|
|
* @param string $url base url to add the query params to
|
|
* @param string $query params in query form with & separated
|
|
*
|
|
* @return string url with query params
|
|
*/
|
|
private function _buildQueryUrl($url, $query)
|
|
{
|
|
$url .= (strstr($url, '?') === false) ? '?' : '&';
|
|
$url .= $query;
|
|
return $url;
|
|
}
|
|
|
|
/**
|
|
* Renaming the session
|
|
*
|
|
* @param string $ticket name of the ticket
|
|
*
|
|
* @return void
|
|
*/
|
|
private function _renameSession($ticket)
|
|
{
|
|
phpCAS::traceBegin();
|
|
if ($this->getChangeSessionID()) {
|
|
if (!empty($this->_user)) {
|
|
$old_session = $_SESSION;
|
|
phpCAS :: trace("Killing session: ". session_id());
|
|
session_destroy();
|
|
// set up a new session, of name based on the ticket
|
|
$session_id = $this->_sessionIdForTicket($ticket);
|
|
phpCAS :: trace("Starting session: ". $session_id);
|
|
session_id($session_id);
|
|
session_start();
|
|
phpCAS :: trace("Restoring old session vars");
|
|
$_SESSION = $old_session;
|
|
} else {
|
|
phpCAS :: trace (
|
|
'Session should only be renamed after successfull authentication'
|
|
);
|
|
}
|
|
} else {
|
|
phpCAS :: trace(
|
|
"Skipping session rename since phpCAS is not handling the session."
|
|
);
|
|
}
|
|
phpCAS::traceEnd();
|
|
}
|
|
|
|
/**
|
|
* Answer a valid session-id given a CAS ticket.
|
|
*
|
|
* The output must be deterministic to allow single-log-out when presented with
|
|
* the ticket to log-out.
|
|
*
|
|
*
|
|
* @param string $ticket name of the ticket
|
|
*
|
|
* @return string
|
|
*/
|
|
private function _sessionIdForTicket($ticket)
|
|
{
|
|
// Hash the ticket to ensure that the value meets the PHP 7.1 requirement
|
|
// that session-ids have a length between 22 and 256 characters.
|
|
return hash('sha256', $this->_sessionIdSalt . $ticket);
|
|
}
|
|
|
|
/**
|
|
* Set a salt/seed for the session-id hash to make it harder to guess.
|
|
*
|
|
* @var string $_sessionIdSalt
|
|
*/
|
|
private $_sessionIdSalt = '';
|
|
|
|
/**
|
|
* Set a salt/seed for the session-id hash to make it harder to guess.
|
|
*
|
|
* @param string $salt
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setSessionIdSalt($salt) {
|
|
$this->_sessionIdSalt = (string)$salt;
|
|
}
|
|
|
|
// ########################################################################
|
|
// AUTHENTICATION ERROR HANDLING
|
|
// ########################################################################
|
|
/**
|
|
* This method is used to print the HTML output when the user was not
|
|
* authenticated.
|
|
*
|
|
* @param string $failure the failure that occured
|
|
* @param string $cas_url the URL the CAS server was asked for
|
|
* @param bool $no_response the response from the CAS server (other
|
|
* parameters are ignored if true)
|
|
* @param bool $bad_response bad response from the CAS server ($err_code
|
|
* and $err_msg ignored if true)
|
|
* @param string $cas_response the response of the CAS server
|
|
* @param int $err_code the error code given by the CAS server
|
|
* @param string $err_msg the error message given by the CAS server
|
|
*
|
|
* @return void
|
|
*/
|
|
private function _authError(
|
|
$failure,
|
|
$cas_url,
|
|
$no_response=false,
|
|
$bad_response=false,
|
|
$cas_response='',
|
|
$err_code=-1,
|
|
$err_msg=''
|
|
) {
|
|
phpCAS::traceBegin();
|
|
$lang = $this->getLangObj();
|
|
$this->printHTMLHeader($lang->getAuthenticationFailed());
|
|
printf(
|
|
$lang->getYouWereNotAuthenticated(), htmlentities($this->getURL()),
|
|
isset($_SERVER['SERVER_ADMIN']) ? $_SERVER['SERVER_ADMIN']:''
|
|
);
|
|
phpCAS::trace('CAS URL: '.$cas_url);
|
|
phpCAS::trace('Authentication failure: '.$failure);
|
|
if ( $no_response ) {
|
|
phpCAS::trace('Reason: no response from the CAS server');
|
|
} else {
|
|
if ( $bad_response ) {
|
|
phpCAS::trace('Reason: bad response from the CAS server');
|
|
} else {
|
|
switch ($this->getServerVersion()) {
|
|
case CAS_VERSION_1_0:
|
|
phpCAS::trace('Reason: CAS error');
|
|
break;
|
|
case CAS_VERSION_2_0:
|
|
case CAS_VERSION_3_0:
|
|
if ( $err_code === -1 ) {
|
|
phpCAS::trace('Reason: no CAS error');
|
|
} else {
|
|
phpCAS::trace(
|
|
'Reason: ['.$err_code.'] CAS error: '.$err_msg
|
|
);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
phpCAS::trace('CAS response: '.$cas_response);
|
|
}
|
|
$this->printHTMLFooter();
|
|
phpCAS::traceExit();
|
|
throw new CAS_GracefullTerminationException();
|
|
}
|
|
|
|
// ########################################################################
|
|
// PGTIOU/PGTID and logoutRequest rebroadcasting
|
|
// ########################################################################
|
|
|
|
/**
|
|
* Boolean of whether to rebroadcast pgtIou/pgtId and logoutRequest, and
|
|
* array of the nodes.
|
|
*/
|
|
private $_rebroadcast = false;
|
|
private $_rebroadcast_nodes = array();
|
|
|
|
/**
|
|
* Constants used for determining rebroadcast node type.
|
|
*/
|
|
const HOSTNAME = 0;
|
|
const IP = 1;
|
|
|
|
/**
|
|
* Determine the node type from the URL.
|
|
*
|
|
* @param String $nodeURL The node URL.
|
|
*
|
|
* @return int hostname
|
|
*
|
|
*/
|
|
private function _getNodeType($nodeURL)
|
|
{
|
|
phpCAS::traceBegin();
|
|
if (preg_match("/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/", $nodeURL)) {
|
|
phpCAS::traceEnd(self::IP);
|
|
return self::IP;
|
|
} else {
|
|
phpCAS::traceEnd(self::HOSTNAME);
|
|
return self::HOSTNAME;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Store the rebroadcast node for pgtIou/pgtId and logout requests.
|
|
*
|
|
* @param string $rebroadcastNodeUrl The rebroadcast node URL.
|
|
*
|
|
* @return void
|
|
*/
|
|
public function addRebroadcastNode($rebroadcastNodeUrl)
|
|
{
|
|
// Argument validation
|
|
if ( !(bool)preg_match("/^(http|https):\/\/([A-Z0-9][A-Z0-9_-]*(?:\.[A-Z0-9][A-Z0-9_-]*)+):?(\d+)?\/?/i", $rebroadcastNodeUrl))
|
|
throw new CAS_TypeMismatchException($rebroadcastNodeUrl, '$rebroadcastNodeUrl', 'url');
|
|
|
|
// Store the rebroadcast node and set flag
|
|
$this->_rebroadcast = true;
|
|
$this->_rebroadcast_nodes[] = $rebroadcastNodeUrl;
|
|
}
|
|
|
|
/**
|
|
* An array to store extra rebroadcast curl options.
|
|
*/
|
|
private $_rebroadcast_headers = array();
|
|
|
|
/**
|
|
* This method is used to add header parameters when rebroadcasting
|
|
* pgtIou/pgtId or logoutRequest.
|
|
*
|
|
* @param string $header Header to send when rebroadcasting.
|
|
*
|
|
* @return void
|
|
*/
|
|
public function addRebroadcastHeader($header)
|
|
{
|
|
if (gettype($header) != 'string')
|
|
throw new CAS_TypeMismatchException($header, '$header', 'string');
|
|
|
|
$this->_rebroadcast_headers[] = $header;
|
|
}
|
|
|
|
/**
|
|
* Constants used for determining rebroadcast type (logout or pgtIou/pgtId).
|
|
*/
|
|
const LOGOUT = 0;
|
|
const PGTIOU = 1;
|
|
|
|
/**
|
|
* This method rebroadcasts logout/pgtIou requests. Can be LOGOUT,PGTIOU
|
|
*
|
|
* @param int $type type of rebroadcasting.
|
|
*
|
|
* @return void
|
|
*/
|
|
private function _rebroadcast($type)
|
|
{
|
|
phpCAS::traceBegin();
|
|
|
|
$rebroadcast_curl_options = array(
|
|
CURLOPT_FAILONERROR => 1,
|
|
CURLOPT_FOLLOWLOCATION => 1,
|
|
CURLOPT_RETURNTRANSFER => 1,
|
|
CURLOPT_CONNECTTIMEOUT => 1,
|
|
CURLOPT_TIMEOUT => 4);
|
|
|
|
// Try to determine the IP address of the server
|
|
if (!empty($_SERVER['SERVER_ADDR'])) {
|
|
$ip = $_SERVER['SERVER_ADDR'];
|
|
} else if (!empty($_SERVER['LOCAL_ADDR'])) {
|
|
// IIS 7
|
|
$ip = $_SERVER['LOCAL_ADDR'];
|
|
}
|
|
// Try to determine the DNS name of the server
|
|
if (!empty($ip)) {
|
|
$dns = gethostbyaddr($ip);
|
|
}
|
|
$multiClassName = 'CAS_Request_CurlMultiRequest';
|
|
$multiRequest = new $multiClassName();
|
|
|
|
for ($i = 0; $i < sizeof($this->_rebroadcast_nodes); $i++) {
|
|
if ((($this->_getNodeType($this->_rebroadcast_nodes[$i]) == self::HOSTNAME) && !empty($dns) && (stripos($this->_rebroadcast_nodes[$i], $dns) === false))
|
|
|| (($this->_getNodeType($this->_rebroadcast_nodes[$i]) == self::IP) && !empty($ip) && (stripos($this->_rebroadcast_nodes[$i], $ip) === false))
|
|
) {
|
|
phpCAS::trace(
|
|
'Rebroadcast target URL: '.$this->_rebroadcast_nodes[$i]
|
|
.$_SERVER['REQUEST_URI']
|
|
);
|
|
$className = $this->_requestImplementation;
|
|
$request = new $className();
|
|
|
|
$url = $this->_rebroadcast_nodes[$i].$_SERVER['REQUEST_URI'];
|
|
$request->setUrl($url);
|
|
|
|
if (count($this->_rebroadcast_headers)) {
|
|
$request->addHeaders($this->_rebroadcast_headers);
|
|
}
|
|
|
|
$request->makePost();
|
|
if ($type == self::LOGOUT) {
|
|
// Logout request
|
|
$request->setPostBody(
|
|
'rebroadcast=false&logoutRequest='.$_POST['logoutRequest']
|
|
);
|
|
} else if ($type == self::PGTIOU) {
|
|
// pgtIou/pgtId rebroadcast
|
|
$request->setPostBody('rebroadcast=false');
|
|
}
|
|
|
|
$request->setCurlOptions($rebroadcast_curl_options);
|
|
|
|
$multiRequest->addRequest($request);
|
|
} else {
|
|
phpCAS::trace(
|
|
'Rebroadcast not sent to self: '
|
|
.$this->_rebroadcast_nodes[$i].' == '.(!empty($ip)?$ip:'')
|
|
.'/'.(!empty($dns)?$dns:'')
|
|
);
|
|
}
|
|
}
|
|
// We need at least 1 request
|
|
if ($multiRequest->getNumRequests() > 0) {
|
|
$multiRequest->send();
|
|
}
|
|
phpCAS::traceEnd();
|
|
}
|
|
|
|
/** @} */
|
|
}
|