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<?php
/**
* Authenticate using PAPI protocol.
*
* @author Jaime Perez, RedIRIS
* @package simpleSAMLphp
*/
include("poa2/PoA.php");
class sspmod_papi_Auth_Source_PAPI extends SimpleSAML_Auth_Source {
/**
* The string used to identify our states.
*/
const STAGE_INIT = 'sspmod_papi_Auth_Source_PAPI.state';
/**
* The key of the AuthId field in the state.
*/
const AUTHID = 'sspmod_papi_Auth_Source_PAPI.AuthId';
/**
* @var the PoA to use.
*/
private $_poa;
/**
* @var the home locator interface to use.
*/
private $_hli;
/**
* @var the PAPIOPOA to use.
*/
private $_papiopoa;
/**
* @var the attributes of the user.
*/
private $_attrs;
/**
* @var the state ID to retrieve the original request later.
*/
private $_stateId;
/**
* Constructor for this authentication source.
*
* @param array $info Information about this authentication source.
* @param array $config Configuration.
*/
public function __construct($info, $config) {
assert('is_array($info)');
assert('is_array($config)');
/* Call the parent constructor first, as required by the interface. */
parent::__construct($info, $config);
if (!array_key_exists('site', $config)) {
throw new Exception('PAPI authentication source is not properly configured: missing [site]');
}
$this->_poa = new PoA($config['site']);
if (array_key_exists('hli', $config)) {
$this->_hli = $config['hli'];
}
}
/**
* Hook that will set Home Locator Identifier, PAPIOPOA and/or State ID.
*
* @param The PAPI request parameters that will be modified/extended.
*/
public function modifyParams(&$params) {
if (!empty($this->_hli)) {
$params['PAPIHLI'] = $this->_hli;
}
if (!empty($this->_papiopoa)) {
$params['PAPIOPOA'] = $this->_papiopoa;
}
$params['URL'] = $params['URL'].urlencode("&SSPStateID=".$this->_stateId);
return false;
}
/**
* Parse the attribute array in a format suitable for SSP.
*
* @param the original attribute array.
*/
protected function parseAttributes($attrs) {
assert('is_array($attrs)');
foreach ($attrs as $name => $value) {
if (!is_array($value)) {
$attrs[$name] = array($value);
}
}
return $attrs;
}
/**
* Log-in using PAPI
*
* @param array &$state Information about the current authentication.
*/
public function authenticate(&$state) {
assert('is_array($state)');
$this->_papiopoa = $state['SPMetadata']['entityid'];
// check if we are returning back from PAPI authentication
if (isset($_REQUEST['SSPStateID'])) {
// yes! restore original request
$this->_stateId = (string)$_REQUEST['SSPStateID'];
// sanitize the input
$sid = SimpleSAML_Utilities::parseStateID($this->_stateId);
if (!is_null($sid['url'])) {
SimpleSAML_Utilities::checkURLAllowed($sid['url']);
}
$state = SimpleSAML_Auth_State::loadState($this->_stateId, self::STAGE_INIT);
} else if (!$this->_poa->isAuthenticated()) {
// no! we have to save the request
/* We are will need the authId in order to retrieve this authentication source later. */
$state[self::AUTHID] = $this->authId;
$this->_stateId = SimpleSAML_Auth_State::saveState($state, self::STAGE_INIT);
$this->_poa->addHook("PAPI_REDIRECT_URL_FINISH", new Hook(array($this, "modifyParams")));
}
$this->_poa->authenticate();
$this->_attrs = $this->_poa->getAttributes();
$state['Attributes'] = $this->parseAttributes($this->_attrs);
self::completeAuth($state);
}
/**
* Log out from this authentication source.
*
* This function should be overridden if the authentication source requires special
* steps to complete a logout operation.
*
* If the logout process requires a redirect, the state should be saved. Once the
* logout operation is completed, the state should be restored, and completeLogout
* should be called with the state. If this operation can be completed without
* showing the user a page, or redirecting, this function should return.
*
* @param array &$state Information about the current logout operation.
*/
public function logout(&$state) {
assert('is_array($state)');
// check first if we have a valid session
if ($this->_poa->isAuthenticated()) {
/* We are will need the authId in order to retrieve this authentication source later. */
$state[self::AUTHID] = $this->authId;
$this->_stateId = SimpleSAML_Auth_State::saveState($state, self::STAGE_INIT);
// TODO: pending on phpPoA adding PAPI_SLO_REDIRECT_URL_FINISH hook
$this->_poa->addHook("PAPI_SLO_REDIRECT_URL_FINISH", new Hook(array($this, "modifyParams")));
// perform single logout, this won't return
$this->_poa->logout(true);
} else if (isset($_REQUEST['SSPStateID'])) {
$this->_stateId = (string)$_REQUEST['SSPStateID'];
// sanitize the input
$sid = SimpleSAML_Utilities::parseStateID($this->_stateId);
if (!is_null($sid['url'])) {
SimpleSAML_Utilities::checkURLAllowed($sid['url']);
}
$state = SimpleSAML_Auth_State::loadState($this->_stateId, self::STAGE_INIT);
} else {
return;
}
self::completeLogout($state);
}
}
?>
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