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gnu-social/vendor/apereo/phpcas/source/CAS/Client.php

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[CORE][COMPOSER] Move plugins extlibs to composer (where appropriate)
2019-06-23 06:23:21 +09:00
<?php
/**
* Licensed to Jasig under one or more contributor license
* agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership.
*
* Jasig licenses this file to you under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* PHP Version 5
*
* @file CAS/Client.php
* @category Authentication
* @package PhpCAS
* @author Pascal Aubry <pascal.aubry@univ-rennes1.fr>
* @author Olivier Berger <olivier.berger@it-sudparis.eu>
* @author Brett Bieber <brett.bieber@gmail.com>
* @author Joachim Fritschi <jfritschi@freenet.de>
* @author Adam Franco <afranco@middlebury.edu>
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* @author Tobias Schiebeck <tobias.schiebeck@manchester.ac.uk>
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* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
* @link https://wiki.jasig.org/display/CASC/phpCAS
*/
/**
* The CAS_Client class is a client interface that provides CAS authentication
* to PHP applications.
*
* @class CAS_Client
* @category Authentication
* @package PhpCAS
* @author Pascal Aubry <pascal.aubry@univ-rennes1.fr>
* @author Olivier Berger <olivier.berger@it-sudparis.eu>
* @author Brett Bieber <brett.bieber@gmail.com>
* @author Joachim Fritschi <jfritschi@freenet.de>
* @author Adam Franco <afranco@middlebury.edu>
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* @author Tobias Schiebeck <tobias.schiebeck@manchester.ac.uk>
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* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
* @link https://wiki.jasig.org/display/CASC/phpCAS
*
*/
class CAS_Client
{
// ########################################################################
// HTML OUTPUT
// ########################################################################
/**
* @addtogroup internalOutput
* @{
*/
/**
* This method filters a string by replacing special tokens by appropriate values
* and prints it. The corresponding tokens are taken into account:
* - __CAS_VERSION__
* - __PHPCAS_VERSION__
* - __SERVER_BASE_URL__
*
* Used by CAS_Client::PrintHTMLHeader() and CAS_Client::printHTMLFooter().
*
* @param string $str the string to filter and output
*
* @return void
*/
private function _htmlFilterOutput($str)
{
$str = str_replace('__CAS_VERSION__', $this->getServerVersion(), $str);
$str = str_replace('__PHPCAS_VERSION__', phpCAS::getVersion(), $str);
$str = str_replace('__SERVER_BASE_URL__', $this->_getServerBaseURL(), $str);
echo $str;
}
/**
* A string used to print the header of HTML pages. Written by
* CAS_Client::setHTMLHeader(), read by CAS_Client::printHTMLHeader().
*
* @hideinitializer
* @see CAS_Client::setHTMLHeader, CAS_Client::printHTMLHeader()
*/
private $_output_header = '';
/**
* This method prints the header of the HTML output (after filtering). If
* CAS_Client::setHTMLHeader() was not used, a default header is output.
*
* @param string $title the title of the page
*
* @return void
* @see _htmlFilterOutput()
*/
public function printHTMLHeader($title)
{
$this->_htmlFilterOutput(
str_replace(
'__TITLE__', $title,
(empty($this->_output_header)
? '<html><head><title>__TITLE__</title></head><body><h1>__TITLE__</h1>'
: $this->_output_header)
)
);
}
/**
* A string used to print the footer of HTML pages. Written by
* CAS_Client::setHTMLFooter(), read by printHTMLFooter().
*
* @hideinitializer
* @see CAS_Client::setHTMLFooter, CAS_Client::printHTMLFooter()
*/
private $_output_footer = '';
/**
* This method prints the footer of the HTML output (after filtering). If
* CAS_Client::setHTMLFooter() was not used, a default footer is output.
*
* @return void
* @see _htmlFilterOutput()
*/
public function printHTMLFooter()
{
$lang = $this->getLangObj();
$this->_htmlFilterOutput(
empty($this->_output_footer)?
(phpCAS::getVerbose())?
'<hr><address>phpCAS __PHPCAS_VERSION__ '
.$lang->getUsingServer()
.' <a href="__SERVER_BASE_URL__">__SERVER_BASE_URL__</a> (CAS __CAS_VERSION__)</a></address></body></html>'
:'</body></html>'
:$this->_output_footer
);
}
/**
* This method set the HTML header used for all outputs.
*
* @param string $header the HTML header.
*
* @return void
*/
public function setHTMLHeader($header)
{
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// Argument Validation
if (gettype($header) != 'string')
throw new CAS_TypeMismatchException($header, '$header', 'string');
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$this->_output_header = $header;
}
/**
* This method set the HTML footer used for all outputs.
*
* @param string $footer the HTML footer.
*
* @return void
*/
public function setHTMLFooter($footer)
{
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// Argument Validation
if (gettype($footer) != 'string')
throw new CAS_TypeMismatchException($footer, '$footer', 'string');
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$this->_output_footer = $footer;
}
/** @} */
// ########################################################################
// INTERNATIONALIZATION
// ########################################################################
/**
* @addtogroup internalLang
* @{
*/
/**
* A string corresponding to the language used by phpCAS. Written by
* CAS_Client::setLang(), read by CAS_Client::getLang().
* @note debugging information is always in english (debug purposes only).
*/
private $_lang = PHPCAS_LANG_DEFAULT;
/**
* This method is used to set the language used by phpCAS.
*
* @param string $lang representing the language.
*
* @return void
*/
public function setLang($lang)
{
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// Argument Validation
if (gettype($lang) != 'string')
throw new CAS_TypeMismatchException($lang, '$lang', 'string');
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phpCAS::traceBegin();
$obj = new $lang();
if (!($obj instanceof CAS_Languages_LanguageInterface)) {
throw new CAS_InvalidArgumentException(
'$className must implement the CAS_Languages_LanguageInterface'
);
}
$this->_lang = $lang;
phpCAS::traceEnd();
}
/**
* Create the language
*
* @return CAS_Languages_LanguageInterface object implementing the class
*/
public function getLangObj()
{
$classname = $this->_lang;
return new $classname();
}
/** @} */
// ########################################################################
// CAS SERVER CONFIG
// ########################################################################
/**
* @addtogroup internalConfig
* @{
*/
/**
* a record to store information about the CAS server.
* - $_server['version']: the version of the CAS server
* - $_server['hostname']: the hostname of the CAS server
* - $_server['port']: the port the CAS server is running on
* - $_server['uri']: the base URI the CAS server is responding on
* - $_server['base_url']: the base URL of the CAS server
* - $_server['login_url']: the login URL of the CAS server
* - $_server['service_validate_url']: the service validating URL of the
* CAS server
* - $_server['proxy_url']: the proxy URL of the CAS server
* - $_server['proxy_validate_url']: the proxy validating URL of the CAS server
* - $_server['logout_url']: the logout URL of the CAS server
*
* $_server['version'], $_server['hostname'], $_server['port'] and
* $_server['uri'] are written by CAS_Client::CAS_Client(), read by
* CAS_Client::getServerVersion(), CAS_Client::_getServerHostname(),
* CAS_Client::_getServerPort() and CAS_Client::_getServerURI().
*
* The other fields are written and read by CAS_Client::_getServerBaseURL(),
* CAS_Client::getServerLoginURL(), CAS_Client::getServerServiceValidateURL(),
* CAS_Client::getServerProxyValidateURL() and CAS_Client::getServerLogoutURL().
*
* @hideinitializer
*/
private $_server = array(
'version' => '',
'hostname' => 'none',
'port' => -1,
'uri' => 'none');
/**
* This method is used to retrieve the version of the CAS server.
*
* @return string the version of the CAS server.
*/
public function getServerVersion()
{
return $this->_server['version'];
}
/**
* This method is used to retrieve the hostname of the CAS server.
*
* @return string the hostname of the CAS server.
*/
private function _getServerHostname()
{
return $this->_server['hostname'];
}
/**
* This method is used to retrieve the port of the CAS server.
*
* @return int the port of the CAS server.
*/
private function _getServerPort()
{
return $this->_server['port'];
}
/**
* This method is used to retrieve the URI of the CAS server.
*
* @return string a URI.
*/
private function _getServerURI()
{
return $this->_server['uri'];
}
/**
* This method is used to retrieve the base URL of the CAS server.
*
* @return string a URL.
*/
private function _getServerBaseURL()
{
// the URL is build only when needed
if ( empty($this->_server['base_url']) ) {
$this->_server['base_url'] = 'https://' . $this->_getServerHostname();
if ($this->_getServerPort()!=443) {
$this->_server['base_url'] .= ':'
.$this->_getServerPort();
}
$this->_server['base_url'] .= $this->_getServerURI();
}
return $this->_server['base_url'];
}
/**
* This method is used to retrieve the login URL of the CAS server.
*
* @param bool $gateway true to check authentication, false to force it
* @param bool $renew true to force the authentication with the CAS server
*
* @return string a URL.
* @note It is recommended that CAS implementations ignore the "gateway"
* parameter if "renew" is set
*/
public function getServerLoginURL($gateway=false,$renew=false)
{
phpCAS::traceBegin();
// the URL is build only when needed
if ( empty($this->_server['login_url']) ) {
$this->_server['login_url'] = $this->_buildQueryUrl($this->_getServerBaseURL().'login','service='.urlencode($this->getURL()));
}
$url = $this->_server['login_url'];
if ($renew) {
// It is recommended that when the "renew" parameter is set, its
// value be "true"
$url = $this->_buildQueryUrl($url, 'renew=true');
} elseif ($gateway) {
// It is recommended that when the "gateway" parameter is set, its
// value be "true"
$url = $this->_buildQueryUrl($url, 'gateway=true');
}
phpCAS::traceEnd($url);
return $url;
}
/**
* This method sets the login URL of the CAS server.
*
* @param string $url the login URL
*
* @return string login url
*/
public function setServerLoginURL($url)
{
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// Argument Validation
if (gettype($url) != 'string')
throw new CAS_TypeMismatchException($url, '$url', 'string');
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return $this->_server['login_url'] = $url;
}
/**
* This method sets the serviceValidate URL of the CAS server.
*
* @param string $url the serviceValidate URL
*
* @return string serviceValidate URL
*/
public function setServerServiceValidateURL($url)
{
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// Argument Validation
if (gettype($url) != 'string')
throw new CAS_TypeMismatchException($url, '$url', 'string');
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return $this->_server['service_validate_url'] = $url;
}
/**
* This method sets the proxyValidate URL of the CAS server.
*
* @param string $url the proxyValidate URL
*
* @return string proxyValidate URL
*/
public function setServerProxyValidateURL($url)
{
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// Argument Validation
if (gettype($url) != 'string')
throw new CAS_TypeMismatchException($url, '$url', 'string');
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return $this->_server['proxy_validate_url'] = $url;
}
/**
* This method sets the samlValidate URL of the CAS server.
*
* @param string $url the samlValidate URL
*
* @return string samlValidate URL
*/
public function setServerSamlValidateURL($url)
{
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// Argument Validation
if (gettype($url) != 'string')
throw new CAS_TypeMismatchException($url, '$url', 'string');
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return $this->_server['saml_validate_url'] = $url;
}
/**
* This method is used to retrieve the service validating URL of the CAS server.
*
* @return string serviceValidate URL.
*/
public function getServerServiceValidateURL()
{
phpCAS::traceBegin();
// the URL is build only when needed
if ( empty($this->_server['service_validate_url']) ) {
switch ($this->getServerVersion()) {
case CAS_VERSION_1_0:
$this->_server['service_validate_url'] = $this->_getServerBaseURL()
.'validate';
break;
case CAS_VERSION_2_0:
$this->_server['service_validate_url'] = $this->_getServerBaseURL()
.'serviceValidate';
break;
case CAS_VERSION_3_0:
$this->_server['service_validate_url'] = $this->_getServerBaseURL()
.'p3/serviceValidate';
break;
}
}
$url = $this->_buildQueryUrl(
$this->_server['service_validate_url'],
'service='.urlencode($this->getURL())
);
phpCAS::traceEnd($url);
return $url;
}
/**
* This method is used to retrieve the SAML validating URL of the CAS server.
*
* @return string samlValidate URL.
*/
public function getServerSamlValidateURL()
{
phpCAS::traceBegin();
// the URL is build only when needed
if ( empty($this->_server['saml_validate_url']) ) {
switch ($this->getServerVersion()) {
case SAML_VERSION_1_1:
$this->_server['saml_validate_url'] = $this->_getServerBaseURL().'samlValidate';
break;
}
}
$url = $this->_buildQueryUrl(
$this->_server['saml_validate_url'],
'TARGET='.urlencode($this->getURL())
);
phpCAS::traceEnd($url);
return $url;
}
/**
* This method is used to retrieve the proxy validating URL of the CAS server.
*
* @return string proxyValidate URL.
*/
public function getServerProxyValidateURL()
{
phpCAS::traceBegin();
// the URL is build only when needed
if ( empty($this->_server['proxy_validate_url']) ) {
switch ($this->getServerVersion()) {
case CAS_VERSION_1_0:
$this->_server['proxy_validate_url'] = '';
break;
case CAS_VERSION_2_0:
$this->_server['proxy_validate_url'] = $this->_getServerBaseURL().'proxyValidate';
break;
case CAS_VERSION_3_0:
$this->_server['proxy_validate_url'] = $this->_getServerBaseURL().'p3/proxyValidate';
break;
}
}
$url = $this->_buildQueryUrl(
$this->_server['proxy_validate_url'],
'service='.urlencode($this->getURL())
);
phpCAS::traceEnd($url);
return $url;
}
/**
* This method is used to retrieve the proxy URL of the CAS server.
*
* @return string proxy URL.
*/
public function getServerProxyURL()
{
// the URL is build only when needed
if ( empty($this->_server['proxy_url']) ) {
switch ($this->getServerVersion()) {
case CAS_VERSION_1_0:
$this->_server['proxy_url'] = '';
break;
case CAS_VERSION_2_0:
case CAS_VERSION_3_0:
$this->_server['proxy_url'] = $this->_getServerBaseURL().'proxy';
break;
}
}
return $this->_server['proxy_url'];
}
/**
* This method is used to retrieve the logout URL of the CAS server.
*
* @return string logout URL.
*/
public function getServerLogoutURL()
{
// the URL is build only when needed
if ( empty($this->_server['logout_url']) ) {
$this->_server['logout_url'] = $this->_getServerBaseURL().'logout';
}
return $this->_server['logout_url'];
}
/**
* This method sets the logout URL of the CAS server.
*
* @param string $url the logout URL
*
* @return string logout url
*/
public function setServerLogoutURL($url)
{
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// Argument Validation
if (gettype($url) != 'string')
throw new CAS_TypeMismatchException($url, '$url', 'string');
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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.
*
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* @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)
* @param \SessionHandlerInterface $sessionHandler the session handler
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*
* @return self a newly created CAS_Client object
*/
public function __construct(
$server_version,
$proxy,
$server_hostname,
$server_port,
$server_uri,
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$changeSessionID = true,
\SessionHandlerInterface $sessionHandler = null
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) {
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// Argument validation
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if (gettype($server_version) != 'string')
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throw new CAS_TypeMismatchException($server_version, '$server_version', 'string');
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if (gettype($proxy) != 'boolean')
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throw new CAS_TypeMismatchException($proxy, '$proxy', 'boolean');
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if (gettype($server_hostname) != 'string')
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throw new CAS_TypeMismatchException($server_hostname, '$server_hostname', 'string');
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if (gettype($server_port) != 'integer')
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throw new CAS_TypeMismatchException($server_port, '$server_port', 'integer');
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if (gettype($server_uri) != 'string')
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throw new CAS_TypeMismatchException($server_uri, '$server_uri', 'string');
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if (gettype($changeSessionID) != 'boolean')
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throw new CAS_TypeMismatchException($changeSessionID, '$changeSessionID', 'boolean');
if (empty($sessionHandler)) {
$sessionHandler = new CAS_Session_PhpSession;
}
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phpCAS::traceBegin();
// true : allow to change the session_id(), false session_id won't be
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// changed and logout won't be handled because of that
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$this->_setChangeSessionID($changeSessionID);
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$this->setSessionHandler($sessionHandler);
if (!$this->_isLogoutRequest()) {
if (session_id() === "") {
// skip Session Handling for logout requests and if don't want it
session_start();
phpCAS :: trace("Starting a new session " . session_id());
}
// init phpCAS session array
if (!isset($_SESSION[static::PHPCAS_SESSION_PREFIX])
|| !is_array($_SESSION[static::PHPCAS_SESSION_PREFIX])) {
$_SESSION[static::PHPCAS_SESSION_PREFIX] = array();
}
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}
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// Only for debug purposes
if ($this->isSessionAuthenticated()){
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phpCAS :: trace("Session is authenticated as: " . $this->getSessionValue('user'));
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} else {
phpCAS :: trace("Session is not authenticated");
}
// are we in proxy mode ?
$this->_proxy = $proxy;
// Make cookie handling available.
if ($this->isProxy()) {
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if (!$this->hasSessionValue('service_cookies')) {
$this->setSessionValue('service_cookies', array());
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}
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// TODO remove explicit call to $_SESSION
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$this->_serviceCookieJar = new CAS_CookieJar(
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$_SESSION[static::PHPCAS_SESSION_PREFIX]['service_cookies']
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);
}
// 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 ( $this->isProxy() ) {
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if(!empty($_GET['pgtIou'])&&!empty($_GET['pgtId'])) {
$this->_setCallbackMode(true);
$this->_setCallbackModeUsingPost(false);
} elseif (!empty($_POST['pgtIou'])&&!empty($_POST['pgtId'])) {
$this->_setCallbackMode(true);
$this->_setCallbackModeUsingPost(true);
} else {
$this->_setCallbackMode(false);
$this->_setCallbackModeUsingPost(false);
}
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}
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
* @{
*/
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/** The session prefix for phpCAS values */
const PHPCAS_SESSION_PREFIX = 'phpCAS';
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/**
* @var bool A variable to whether phpcas will use its own session handling. Default = true
* @hideinitializer
*/
private $_change_session_id = true;
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/**
* @var SessionHandlerInterface
*/
private $_sessionHandler;
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/**
* 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;
}
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/**
* Set the session handler.
*
* @param \SessionHandlerInterface $sessionHandler
*
* @return bool
*/
public function setSessionHandler(\SessionHandlerInterface $sessionHandler)
{
$this->_sessionHandler = $sessionHandler;
if (session_status() !== PHP_SESSION_ACTIVE) {
return session_set_save_handler($this->_sessionHandler, true);
}
return true;
}
/**
* Get a session value using the given key.
*
* @param string $key
* @param mixed $default default value if the key is not set
*
* @return mixed
*/
protected function getSessionValue($key, $default = null)
{
$this->validateSession($key);
if (isset($_SESSION[static::PHPCAS_SESSION_PREFIX][$key])) {
return $_SESSION[static::PHPCAS_SESSION_PREFIX][$key];
}
return $default;
}
/**
* Determine whether a session value is set or not.
*
* To check if a session value is empty or not please use
* !!(getSessionValue($key)).
*
* @param string $key
*
* @return bool
*/
protected function hasSessionValue($key)
{
$this->validateSession($key);
return isset($_SESSION[static::PHPCAS_SESSION_PREFIX][$key]);
}
/**
* Set a session value using the given key and value.
*
* @param string $key
* @param mixed $value
*
* @return string
*/
protected function setSessionValue($key, $value)
{
$this->validateSession($key);
$_SESSION[static::PHPCAS_SESSION_PREFIX][$key] = $value;
}
/**
* Remove a session value with the given key.
*
* @param string $key
*/
protected function removeSessionValue($key)
{
$this->validateSession($key);
if (isset($_SESSION[static::PHPCAS_SESSION_PREFIX][$key])) {
unset($_SESSION[static::PHPCAS_SESSION_PREFIX][$key]);
return true;
}
return false;
}
/**
* Remove all phpCAS session values.
*/
protected function clearSessionValues()
{
unset($_SESSION[static::PHPCAS_SESSION_PREFIX]);
}
/**
* Ensure $key is a string for session utils input
*
* @param string $key
*
* @return bool
*/
protected function validateSession($key)
{
if (!is_string($key)) {
throw new InvalidArgumentException('Session key must be a string.');
}
return true;
}
/**
* Renaming the session
*
* @param string $ticket name of the ticket
*
* @return void
*/
protected function _renameSession($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();
}
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/** @} */
// 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()
{
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// Sequence validation
$this->ensureAuthenticationCallSuccessful();
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return $this->_getUser();
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}
/**
* This method returns the CAS user's login name.
*
* @return string the login name of the authenticated user
*
* @warning should be called only after CAS_Client::forceAuthentication() or
* CAS_Client::isAuthenticated(), otherwise halt with an error.
*/
private function _getUser()
{
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// This is likely a duplicate check that could be removed....
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if ( empty($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()
{
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// Sequence validation
$this->ensureAuthenticationCallSuccessful();
// This is likely a duplicate check that could be removed....
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if ( empty($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()
{
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// Sequence validation
$this->ensureAuthenticationCallSuccessful();
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return !empty($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)
{
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// Sequence validation
$this->ensureAuthenticationCallSuccessful();
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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)
{
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// Sequence validation
$this->ensureAuthenticationCallSuccessful();
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if ($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
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$this->removeSessionValue('auth_checked');
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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');
$res = true;
} else {
// the user is not authenticated, redirect to the CAS server
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$this->removeSessionValue('auth_checked');
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$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)
{
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if (gettype($n) != 'integer')
throw new CAS_TypeMismatchException($n, '$n', 'string');
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$this->_cache_times_for_auth_recheck = $n;
}
/**
* This method is called to check whether the user is authenticated or not.
*
* @return bool true when the user is authenticated, false when a previous
* gateway login failed or the function will not return if the user is
* redirected to the cas server for a gateway login attempt
*/
public function checkAuthentication()
{
phpCAS::traceBegin();
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$res = false; // default
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if ( $this->isAuthenticated() ) {
phpCAS::trace('user is authenticated');
/* The 'auth_checked' variable is removed just in case it's set. */
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$this->removeSessionValue('auth_checked');
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$res = true;
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} else if ($this->getSessionValue('auth_checked')) {
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// the previous request has redirected the client to the CAS server
// with gateway=true
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$this->removeSessionValue('auth_checked');
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} else {
// avoid a check against CAS on every request
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// we need to write this back to session later
$unauth_count = $this->getSessionValue('unauth_count', -2);
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if (($unauth_count != -2
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&& $this->_cache_times_for_auth_recheck == -1)
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|| ($unauth_count >= 0
&& $unauth_count < $this->_cache_times_for_auth_recheck)
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) {
if ($this->_cache_times_for_auth_recheck != -1) {
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$unauth_count++;
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phpCAS::trace(
'user is not authenticated (cached for '
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.$unauth_count.' times of '
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.$this->_cache_times_for_auth_recheck.')'
);
} else {
phpCAS::trace(
'user is not authenticated (cached for until login pressed)'
);
}
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$this->setSessionValue('unauth_count', $unauth_count);
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} else {
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$this->setSessionValue('unauth_count', 0);
$this->setSessionValue('auth_checked', true);
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phpCAS::trace('user is not authenticated (cache reset)');
$this->redirectToCas(true/* gateway */);
// never reached
}
}
phpCAS::traceEnd($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'
);
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$this->setSessionValue('user', $this->_getUser());
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$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');
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$this->setSessionValue('pgt', $this->_getPGT());
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}
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$this->setSessionValue('user', $this->_getUser());
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if (!empty($this->_attributes)) {
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$this->setSessionValue('attributes', $this->_attributes);
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}
$proxies = $this->getProxies();
if (!empty($proxies)) {
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$this->setSessionValue('proxies', $this->getProxies());
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}
$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'
);
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$this->setSessionValue('user', $this->_getUser());
$this->setSessionValue('attributes', $this->_attributes);
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$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 $_SESSION variable
*/
public function isSessionAuthenticated ()
{
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return !!$this->getSessionValue('user');
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}
/**
* 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()
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&& $this->getSessionValue('pgt')
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) {
// authentication already done
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$this->_setUser($this->getSessionValue('user'));
if ($this->hasSessionValue('attributes')) {
$this->setAttributes($this->getSessionValue('attributes'));
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}
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$this->_setPGT($this->getSessionValue('pgt'));
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phpCAS::trace(
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'user = `'.$this->getSessionValue('user').'\', PGT = `'
.$this->getSessionValue('pgt').'\''
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);
// Include the list of proxies
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if ($this->hasSessionValue('proxies')) {
$this->_setProxies($this->getSessionValue('proxies'));
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phpCAS::trace(
'proxies = "'
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.implode('", "', $this->getSessionValue('proxies')).'"'
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);
}
$auth = true;
} elseif ( $this->isSessionAuthenticated()
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&& !$this->getSessionValue('pgt')
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) {
// these two variables should be empty or not empty at the same time
phpCAS::trace(
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'username found (`'.$this->getSessionValue('user')
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.'\') but PGT is empty'
);
// unset all tickets to enforce authentication
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$this->clearSessionValues();
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$this->setTicket('');
} elseif ( !$this->isSessionAuthenticated()
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&& $this->getSessionValue('pgt')
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) {
// these two variables should be empty or not empty at the same time
phpCAS::trace(
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'PGT found (`'.$this->getSessionValue('pgt')
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.'\') but username is empty'
);
// unset all tickets to enforce authentication
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$this->clearSessionValues();
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$this->setTicket('');
} else {
phpCAS::trace('neither user nor PGT found');
}
} else {
// `simple' CAS client (not a proxy): username must be present
if ( $this->isSessionAuthenticated() ) {
// authentication already done
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$this->_setUser($this->getSessionValue('user'));
if ($this->hasSessionValue('attributes')) {
$this->setAttributes($this->getSessionValue('attributes'));
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}
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phpCAS::trace('user = `'.$this->getSessionValue('user').'\'');
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// Include the list of proxies
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if ($this->hasSessionValue('proxies')) {
$this->_setProxies($this->getSessionValue('proxies'));
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phpCAS::trace(
'proxies = "'
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.implode('", "', $this->getSessionValue('proxies')).'"'
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);
}
$auth = true;
} else {
phpCAS::trace('no user found');
}
}
phpCAS::traceEnd($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, '$validate_cn', 'boolean');
}
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if (!file_exists($cert)) {
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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
// XX XX
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
// ########################################################################
// PROXYING
// ########################################################################
/**
* @addtogroup internalProxy
* @{
*/
/**
* @var bool is the client a proxy
* A boolean telling if the client is a CAS proxy or not. Written by
* CAS_Client::CAS_Client(), read by CAS_Client::isProxy().
*/
private $_proxy;
/**
* @var CAS_CookieJar Handler for managing service cookies.
*/
private $_serviceCookieJar;
/**
* Tells if a CAS client is a CAS proxy or not
*
* @return bool true when the CAS client is a CAS proxy, false otherwise
*/
public function isProxy()
{
return $this->_proxy;
}
/** @} */
// ########################################################################
// PGT
// ########################################################################
/**
* @addtogroup internalProxy
* @{
*/
/**
* the Proxy Grnting Ticket given by the CAS server (empty otherwise).
* Written by CAS_Client::_setPGT(), read by CAS_Client::_getPGT() and
* CAS_Client::_hasPGT().
*
* @hideinitializer
*/
private $_pgt = '';
/**
* This method returns the Proxy Granting Ticket given by the CAS server.
*
* @return string the Proxy Granting Ticket.
*/
private function _getPGT()
{
return $this->_pgt;
}
/**
* This method stores the Proxy Granting Ticket.
*
* @param string $pgt The Proxy Granting Ticket.
*
* @return void
*/
private function _setPGT($pgt)
{
$this->_pgt = $pgt;
}
/**
* This method tells if a Proxy Granting Ticket was stored.
*
* @return bool true if a Proxy Granting Ticket has been stored.
*/
private function _hasPGT()
{
return !empty($this->_pgt);
}
/** @} */
// ########################################################################
// CALLBACK MODE
// ########################################################################
/**
* @addtogroup internalCallback
* @{
*/
/**
* each PHP script using phpCAS in proxy mode is its own callback to get the
* PGT back from the CAS server. callback_mode is detected by the constructor
* thanks to the GET parameters.
*/
/**
* @var bool a boolean to know if the CAS client is running in callback mode. Written by
* CAS_Client::setCallBackMode(), read by CAS_Client::_isCallbackMode().
*
* @hideinitializer
*/
private $_callback_mode = false;
/**
* This method sets/unsets callback mode.
*
* @param bool $callback_mode true to set callback mode, false otherwise.
*
* @return void
*/
private function _setCallbackMode($callback_mode)
{
$this->_callback_mode = $callback_mode;
}
/**
* This method returns true when the CAS client is running in callback mode,
* false otherwise.
*
* @return bool A boolean.
*/
private function _isCallbackMode()
{
return $this->_callback_mode;
}
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/**
* @var bool a boolean to know if the CAS client is using POST parameters when in callback mode.
* Written by CAS_Client::_setCallbackModeUsingPost(), read by CAS_Client::_isCallbackModeUsingPost().
*
* @hideinitializer
*/
private $_callback_mode_using_post = false;
/**
* This method sets/unsets usage of POST parameters in callback mode (default/false is GET parameters)
*
* @param bool $callback_mode_using_post true to use POST, false to use GET (default).
*
* @return void
*/
private function _setCallbackModeUsingPost($callback_mode_using_post)
{
$this->_callback_mode_using_post = $callback_mode_using_post;
}
/**
* This method returns true when the callback mode is using POST, false otherwise.
*
* @return bool A boolean.
*/
private function _isCallbackModeUsingPost()
{
return $this->_callback_mode_using_post;
}
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/**
* the URL that should be used for the PGT callback (in fact the URL of the
* current request without any CGI parameter). Written and read by
* CAS_Client::_getCallbackURL().
*
* @hideinitializer
*/
private $_callback_url = '';
/**
* This method returns the URL that should be used for the PGT callback (in
* fact the URL of the current request without any CGI parameter, except if
* phpCAS::setFixedCallbackURL() was used).
*
* @return string The callback URL
*/
private function _getCallbackURL()
{
// the URL is built when needed only
if ( empty($this->_callback_url) ) {
// remove the ticket if present in the URL
$final_uri = 'https://';
$final_uri .= $this->_getClientUrl();
$request_uri = $_SERVER['REQUEST_URI'];
$request_uri = preg_replace('/\?.*$/', '', $request_uri);
$final_uri .= $request_uri;
$this->_callback_url = $final_uri;
}
return $this->_callback_url;
}
/**
* This method sets the callback url.
*
* @param string $url url to set callback
*
* @return string the callback url
*/
public function setCallbackURL($url)
{
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// Sequence validation
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$this->ensureIsProxy();
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// Argument Validation
if (gettype($url) != 'string')
throw new CAS_TypeMismatchException($url, '$url', 'string');
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return $this->_callback_url = $url;
}
/**
* This method is called by CAS_Client::CAS_Client() when running in callback
* mode. It stores the PGT and its PGT Iou, prints its output and halts.
*
* @return void
*/
private function _callback()
{
phpCAS::traceBegin();
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if ($this->_isCallbackModeUsingPost()) {
$pgtId = $_POST['pgtId'];
$pgtIou = $_POST['pgtIou'];
} else {
$pgtId = $_GET['pgtId'];
$pgtIou = $_GET['pgtIou'];
}
if (preg_match('/^PGTIOU-[\.\-\w]+$/', $pgtIou)) {
if (preg_match('/^[PT]GT-[\.\-\w]+$/', $pgtId)) {
phpCAS::trace('Storing PGT `'.$pgtId.'\' (id=`'.$pgtIou.'\')');
$this->_storePGT($pgtId, $pgtIou);
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if ($this->isXmlResponse()) {
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echo '<?xml version="1.0" encoding="UTF-8"?>' . "\r\n";
echo '<proxySuccess xmlns="http://www.yale.edu/tp/cas" />';
phpCAS::traceExit("XML response sent");
} else {
$this->printHTMLHeader('phpCAS callback');
echo '<p>Storing PGT `'.$pgtId.'\' (id=`'.$pgtIou.'\').</p>';
$this->printHTMLFooter();
phpCAS::traceExit("HTML response sent");
}
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phpCAS::traceExit("Successfull Callback");
} else {
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phpCAS::error('PGT format invalid' . $pgtId);
phpCAS::traceExit('PGT format invalid' . $pgtId);
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}
} else {
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phpCAS::error('PGTiou format invalid' . $pgtIou);
phpCAS::traceExit('PGTiou format invalid' . $pgtIou);
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}
// Flush the buffer to prevent from sending anything other then a 200
// Success Status back to the CAS Server. The Exception would normally
// report as a 500 error.
flush();
throw new CAS_GracefullTerminationException();
}
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/**
* Check if application/xml or text/xml is pressent in HTTP_ACCEPT header values
* when return value is complex and contains attached q parameters.
* Example: HTTP_ACCEPT = text/html,application/xhtml+xml,application/xml;q=0.9
* @return bool
*/
private function isXmlResponse()
{
if (!array_key_exists('HTTP_ACCEPT', $_SERVER)) {
return false;
}
if (strpos($_SERVER['HTTP_ACCEPT'], 'application/xml') === false && strpos($_SERVER['HTTP_ACCEPT'], 'text/xml') === false) {
return false;
}
return true;
}
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/** @} */
// ########################################################################
// PGT STORAGE
// ########################################################################
/**
* @addtogroup internalPGTStorage
* @{
*/
/**
* @var CAS_PGTStorage_AbstractStorage
* an instance of a class inheriting of PGTStorage, used to deal with PGT
* storage. Created by CAS_Client::setPGTStorageFile(), used
* by CAS_Client::setPGTStorageFile() and CAS_Client::_initPGTStorage().
*
* @hideinitializer
*/
private $_pgt_storage = null;
/**
* This method is used to initialize the storage of PGT's.
* Halts on error.
*
* @return void
*/
private function _initPGTStorage()
{
// if no SetPGTStorageXxx() has been used, default to file
if ( !is_object($this->_pgt_storage) ) {
$this->setPGTStorageFile();
}
// initializes the storage
$this->_pgt_storage->init();
}
/**
* This method stores a PGT. Halts on error.
*
* @param string $pgt the PGT to store
* @param string $pgt_iou its corresponding Iou
*
* @return void
*/
private function _storePGT($pgt,$pgt_iou)
{
// ensure that storage is initialized
$this->_initPGTStorage();
// writes the PGT
$this->_pgt_storage->write($pgt, $pgt_iou);
}
/**
* This method reads a PGT from its Iou and deletes the corresponding
* storage entry.
*
* @param string $pgt_iou the PGT Iou
*
* @return string mul The PGT corresponding to the Iou, false when not found.
*/
private function _loadPGT($pgt_iou)
{
// ensure that storage is initialized
$this->_initPGTStorage();
// read the PGT
return $this->_pgt_storage->read($pgt_iou);
}
/**
* This method can be used to set a custom PGT storage object.
*
* @param CAS_PGTStorage_AbstractStorage $storage a PGT storage object that
* inherits from the CAS_PGTStorage_AbstractStorage class
*
* @return void
*/
public function setPGTStorage($storage)
{
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// Sequence validation
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$this->ensureIsProxy();
// check that the storage has not already been set
if ( is_object($this->_pgt_storage) ) {
phpCAS::error('PGT storage already defined');
}
// check to make sure a valid storage object was specified
if ( !($storage instanceof CAS_PGTStorage_AbstractStorage) )
throw new CAS_TypeMismatchException($storage, '$storage', 'CAS_PGTStorage_AbstractStorage object');
// store the PGTStorage object
$this->_pgt_storage = $storage;
}
/**
* This method is used to tell phpCAS to store the response of the
* CAS server to PGT requests in a database.
*
* @param string|PDO $dsn_or_pdo a dsn string to use for creating a PDO
* object or a PDO object
* @param string $username the username to use when connecting to the
* database
* @param string $password the password to use when connecting to the
* database
* @param string $table the table to use for storing and retrieving
* PGTs
* @param string $driver_options any driver options to use when connecting
* to the database
*
* @return void
*/
public function setPGTStorageDb(
$dsn_or_pdo, $username='', $password='', $table='', $driver_options=null
) {
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// Sequence validation
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$this->ensureIsProxy();
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// Argument validation
if (!(is_object($dsn_or_pdo) && $dsn_or_pdo instanceof PDO) && !is_string($dsn_or_pdo))
throw new CAS_TypeMismatchException($dsn_or_pdo, '$dsn_or_pdo', 'string or PDO object');
if (gettype($username) != 'string')
throw new CAS_TypeMismatchException($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
$this->setPGTStorage(
new CAS_PGTStorage_Db(
$this, $dsn_or_pdo, $username, $password, $table, $driver_options
)
);
}
/**
* This method is used to tell phpCAS to store the response of the
* CAS server to PGT requests onto the filesystem.
*
* @param string $path the path where the PGT's should be stored
*
* @return void
*/
public function setPGTStorageFile($path='')
{
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// Sequence validation
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$this->ensureIsProxy();
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// Argument validation
if (gettype($path) != 'string')
throw new CAS_TypeMismatchException($path, '$path', 'string');
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// create the storage object
$this->setPGTStorage(new CAS_PGTStorage_File($this, $path));
}
// ########################################################################
// PGT VALIDATION
// ########################################################################
/**
* This method is used to validate a PGT; halt on failure.
*
* @param string &$validate_url the URL of the request to the CAS server.
* @param string $text_response the response of the CAS server, as is
* (XML text); result of
* CAS_Client::validateCAS10() or
* CAS_Client::validateCAS20().
* @param DOMElement $tree_response the response of the CAS server, as a DOM XML
* tree; result of CAS_Client::validateCAS10() or CAS_Client::validateCAS20().
*
* @return bool true when successfull and issue a CAS_AuthenticationException
* and false on an error
*
* @throws CAS_AuthenticationException
*/
private function _validatePGT(&$validate_url,$text_response,$tree_response)
{
phpCAS::traceBegin();
if ( $tree_response->getElementsByTagName("proxyGrantingTicket")->length == 0) {
phpCAS::trace('<proxyGrantingTicket> not found');
// authentication succeded, but no PGT Iou was transmitted
throw new CAS_AuthenticationException(
$this, 'Ticket validated but no PGT Iou transmitted',
$validate_url, false/*$no_response*/, false/*$bad_response*/,
$text_response
);
} else {
// PGT Iou transmitted, extract it
$pgt_iou = trim(
$tree_response->getElementsByTagName("proxyGrantingTicket")->item(0)->nodeValue
);
if (preg_match('/^PGTIOU-[\.\-\w]+$/', $pgt_iou)) {
$pgt = $this->_loadPGT($pgt_iou);
if ( $pgt == false ) {
phpCAS::trace('could not load PGT');
throw new CAS_AuthenticationException(
$this,
'PGT Iou was transmitted but PGT could not be retrieved',
$validate_url, false/*$no_response*/,
false/*$bad_response*/, $text_response
);
}
$this->_setPGT($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)
{
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// Argument validation
if (gettype($target_service) != 'string')
throw new CAS_TypeMismatchException($target_service, '$target_service', 'string');
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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)
{
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$this->ensureIsProxy();
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$this->ensureAuthenticationCallSuccessful();
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// Argument validation
if (gettype($type) != 'string')
throw new CAS_TypeMismatchException($type, '$type', 'string');
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switch ($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 $proxiedService)
{
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// Sequence validation
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$this->ensureIsProxy();
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$this->ensureAuthenticationCallSuccessful();
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$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)
{
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// Sequence validation
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$this->ensureIsProxy();
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$this->ensureAuthenticationCallSuccessful();
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// Argument validation
if (gettype($url) != 'string')
throw new CAS_TypeMismatchException($url, '$url', 'string');
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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,&$pt)
{
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// Sequence validation
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$this->ensureIsProxy();
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$this->ensureAuthenticationCallSuccessful();
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// Argument validation
if (gettype($url) != 'string')
throw new CAS_TypeMismatchException($url, '$url', 'string');
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if (gettype($serviceUrl) != 'string')
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throw new CAS_TypeMismatchException($serviceUrl, '$serviceUrl', 'string');
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if (gettype($flags) != 'integer')
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throw new CAS_TypeMismatchException($flags, '$flags', 'string');
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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;
}
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/**
* This method recursively parses the attribute XML.
* It also collapses name-value pairs into a single
* array entry. It parses all common formats of
* attributes and well formed XML files.
*
* @param string $root the DOM root element to be parsed
* @param string $namespace namespace of the elements
*
* @return an array of the parsed XML elements
*
* Formats tested:
*
* "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>
*
* "Jasig Style" Attributes (longer version):
*
* <cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'>
* <cas:authenticationSuccess>
* <cas:user>jsmith</cas:user>
* <cas:attributes>
* <cas:attribute>
* <cas:name>surname</cas:name>
* <cas:value>Smith</cas:value>
* </cas:attribute>
* <cas:attribute>
* <cas:name>givenName</cas:name>
* <cas:value>John</cas:value>
* </cas:attribute>
* <cas:attribute>
* <cas:name>memberOf</cas:name>
* <cas:value>['CN=Staff,OU=Groups,DC=example,DC=edu', 'CN=Spanish Department,OU=Departments,OU=Groups,DC=example,DC=edu']</cas:value>
* </cas:attribute>
* </cas:attributes>
* <cas:proxyGrantingTicket>PGTIOU-84678-8a9d2sfa23casd</cas:proxyGrantingTicket>
* </cas:authenticationSuccess>
* </cas:serviceResponse>
*
* "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>
*
* "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>
*
* result:
*
* Array (
* [surname] => Smith
* [givenName] => John
* [memberOf] => Array (
* [0] => CN=Staff, OU=Groups, DC=example, DC=edu
* [1] => CN=Spanish Department, OU=Departments, OU=Groups, DC=example, DC=edu
* )
* )
*/
private function _xml_to_array($root, $namespace = "cas")
{
$result = array();
if ($root->hasAttributes()) {
$attrs = $root->attributes;
$pair = array();
foreach ($attrs as $attr) {
if ($attr->name === "name") {
$pair['name'] = $attr->value;
} elseif ($attr->name === "value") {
$pair['value'] = $attr->value;
} else {
$result[$attr->name] = $attr->value;
}
if (array_key_exists('name', $pair) && array_key_exists('value', $pair)) {
$result[$pair['name']] = $pair['value'];
}
}
}
if ($root->hasChildNodes()) {
$children = $root->childNodes;
if ($children->length == 1) {
$child = $children->item(0);
if ($child->nodeType == XML_TEXT_NODE) {
$result['_value'] = $child->nodeValue;
return (count($result) == 1) ? $result['_value'] : $result;
}
}
$groups = array();
foreach ($children as $child) {
$child_nodeName = str_ireplace($namespace . ":", "", $child->nodeName);
if (in_array($child_nodeName, array("user", "proxies", "proxyGrantingTicket"))) {
continue;
}
if (!isset($result[$child_nodeName])) {
$res = $this->_xml_to_array($child, $namespace);
if (!empty($res)) {
$result[$child_nodeName] = $this->_xml_to_array($child, $namespace);
}
} else {
if (!isset($groups[$child_nodeName])) {
$result[$child_nodeName] = array($result[$child_nodeName]);
$groups[$child_nodeName] = 1;
}
$result[$child_nodeName][] = $this->_xml_to_array($child, $namespace);
}
}
}
return $result;
}
/**
* This method parses a "JSON-like array" of strings
* into an array of strings
*
* @param string $json_value the json-like string:
* e.g.:
* ['CN=Staff,OU=Groups,DC=example,DC=edu', 'CN=Spanish Department,OU=Departments,OU=Groups,DC=example,DC=edu']
*
* @return array of strings Description
* e.g.:
* Array (
* [0] => CN=Staff,OU=Groups,DC=example,DC=edu
* [1] => CN=Spanish Department,OU=Departments,OU=Groups,DC=example,DC=edu
* )
*/
private function _parse_json_like_array_value($json_value)
{
$parts = explode(",", trim($json_value, "[]"));
$out = array();
$quote = '';
foreach ($parts as $part) {
$part = trim($part);
if ($quote === '') {
$value = "";
if ($this->_startsWith($part, '\'')) {
$quote = '\'';
} elseif ($this->_startsWith($part, '"')) {
$quote = '"';
} else {
$out[] = $part;
}
$part = ltrim($part, $quote);
}
if ($quote !== '') {
$value .= $part;
if ($this->_endsWith($part, $quote)) {
$out[] = rtrim($value, $quote);
$quote = '';
} else {
$value .= ", ";
};
}
}
return $out;
}
/**
* This method recursively removes unneccessary hirarchy levels in array-trees.
* into an array of strings
*
* @param array $arr the array to flatten
* e.g.:
* Array (
* [attributes] => Array (
* [attribute] => Array (
* [0] => Array (
* [name] => surname
* [value] => Smith
* )
* [1] => Array (
* [name] => givenName
* [value] => John
* )
* [2] => Array (
* [name] => memberOf
* [value] => ['CN=Staff,OU=Groups,DC=example,DC=edu', 'CN=Spanish Department,OU=Departments,OU=Groups,DC=example,DC=edu']
* )
* )
* )
* )
*
* @return array the flattened array
* e.g.:
* Array (
* [attribute] => Array (
* [surname] => Smith
* [givenName] => John
* [memberOf] => Array (
* [0] => CN=Staff, OU=Groups, DC=example, DC=edu
* [1] => CN=Spanish Department, OU=Departments, OU=Groups, DC=example, DC=edu
* )
* )
* )
*/
private function _flatten_array($arr)
{
if (!is_array($arr)) {
if ($this->_startsWith($arr, '[') && $this->_endsWith($arr, ']')) {
return $this->_parse_json_like_array_value($arr);
} else {
return $arr;
}
}
$out = array();
foreach ($arr as $key => $val) {
if (!is_array($val)) {
$out[$key] = $val;
} else {
switch (count($val)) {
case 1 : {
$key = key($val);
if (array_key_exists($key, $out)) {
$value = $out[$key];
if (!is_array($value)) {
$out[$key] = array();
$out[$key][] = $value;
}
$out[$key][] = $this->_flatten_array($val[$key]);
} else {
$out[$key] = $this->_flatten_array($val[$key]);
};
break;
};
case 2 : {
if (array_key_exists("name", $val) && array_key_exists("value", $val)) {
$key = $val['name'];
if (array_key_exists($key, $out)) {
$value = $out[$key];
if (!is_array($value)) {
$out[$key] = array();
$out[$key][] = $value;
}
$out[$key][] = $this->_flatten_array($val['value']);
} else {
$out[$key] = $this->_flatten_array($val['value']);
};
} else {
$out[$key] = $this->_flatten_array($val);
}
break;
};
default: {
$out[$key] = $this->_flatten_array($val);
}
}
}
}
return $out;
}
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/**
* 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();
$extra_attributes = array();
if ($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
);
} else {
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phpCAS :: trace("Parse extra attributes: ");
$attributes = $this->_xml_to_array($success_elements->item(0));
phpCAS :: trace(print_r($attributes,true). "\nFLATTEN Array: ");
$extra_attributes = $this->_flatten_array($attributes);
phpCAS :: trace(print_r($extra_attributes, true)."\nFILTER : ");
if (array_key_exists("attribute", $extra_attributes)) {
$extra_attributes = $extra_attributes["attribute"];
} elseif (array_key_exists("attributes", $extra_attributes)) {
$extra_attributes = $extra_attributes["attributes"];
};
phpCAS :: trace(print_r($extra_attributes, true)."return");
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}
$this->setAttributes($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)
{
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// Argument Validation
if (gettype($url) != 'string')
throw new CAS_TypeMismatchException($url, '$url', 'string');
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$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 .= $this->_getClientUrl();
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$request_uri = explode('?', $_SERVER['REQUEST_URI'], 2);
$final_uri .= $request_uri[0];
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if (isset($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 !== '') {
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$final_uri .= "?$query_string";
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}
}
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)
{
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// Argument Validation
if (gettype($url) != 'string')
throw new CAS_TypeMismatchException($url, '$url', 'string');
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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;
}
/**
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* This method tests if a string starts with a given character.
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*
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* @param string $text text to test
* @param string $char character to test for
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*
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* @return bool true if the $text starts with $char
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*/
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private function _startsWith($text, $char)
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{
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return (strpos($text, $char) === 0);
}
/**
* This method tests if a string ends with a given character
*
* @param string $text text to test
* @param string $char character to test for
*
* @return bool true if the $text ends with $char
*/
private function _endsWith($text, $char)
{
return (strpos(strrev($text), $char) === 0);
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}
/**
* 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)
{
[VersionBump] 2.0.0beta0 Updated composer and translations composer install --no-dev composer dump-autoload --optimize git add vendor/ --force make updatepo
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// 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');
[CORE][COMPOSER] Move plugins extlibs to composer (where appropriate)
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// 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)
{
[VersionBump] 2.0.0beta0 Updated composer and translations composer install --no-dev composer dump-autoload --optimize git add vendor/ --force make updatepo
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if (gettype($header) != 'string')
throw new CAS_TypeMismatchException($header, '$header', 'string');
[CORE][COMPOSER] Move plugins extlibs to composer (where appropriate)
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$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();
}
/** @} */
}
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