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<?php
/**
* Attribute filter for renaming attributes.
*
* @author Olav Morken, UNINETT AS.
* @package simpleSAMLphp
*/
class sspmod_core_Auth_Process_AttributeMap extends SimpleSAML_Auth_ProcessingFilter {
/**
* Assosiative array with the mappings of attribute names.
*/
private $map = array();
/**
* Should attributes be duplicated or renamed.
*/
private $duplicate = FALSE;
/**
* Initialize this filter, parse configuration
*
* @param array $config Configuration information about this filter.
* @param mixed $reserved For future use.
*/
public function __construct($config, $reserved) {
parent::__construct($config, $reserved);
assert('is_array($config)');
$mapFiles = array();
foreach($config as $origName => $newName) {
if(is_int($origName)) {
if($newName === '%duplicate') {
$this->duplicate = TRUE;
} else {
/* No index given - this is a map file. */
$mapFiles[] = $newName;
}
continue;
}
if(!is_string($origName)) {
throw new Exception('Invalid attribute name: ' . var_export($origName, TRUE));
}
if(!is_string($newName) && !is_array($newName)) {
throw new Exception('Invalid attribute name: ' . var_export($newName, TRUE));
}
$this->map[$origName] = $newName;
}
// Load map files after we determine dupilicate or rename
foreach($mapFiles as &$file) {
$this->loadMapFile($file);
}
}
/**
* Loads and merges in a file with a attribute map.
*
* @param string $fileName Name of attribute map file. Expected to be in the attributenamemapdir.
*/
private function loadMapFile($fileName) {
$config = SimpleSAML_Configuration::getInstance();
$filePath = $config->getPathValue('attributenamemapdir', 'attributemap/') . $fileName . '.php';
if(!file_exists($filePath)) {
throw new Exception('Could not find attributemap file: ' . $filePath);
}
$attributemap = NULL;
include($filePath);
if(!is_array($attributemap)) {
throw new Exception('Attribute map file "' . $filePath . '" didn\'t define an attribute map.');
}
if ($this->duplicate) {
$this->map = array_merge_recursive($this->map, $attributemap);
} else {
$this->map = array_merge($this->map, $attributemap);
}
}
/**
* Apply filter to rename attributes.
*
* @param array &$request The current request
*/
public function process(&$request) {
assert('is_array($request)');
assert('array_key_exists("Attributes", $request)');
$attributes =& $request['Attributes'];
foreach($attributes as $name => $values) {
if(array_key_exists($name, $this->map)) {
if(!is_array($this->map[$name])) {
if (!$this->duplicate) {
unset($attributes[$name]);
}
$attributes[$this->map[$name]] = $values;
} else {
foreach($this->map[$name] as $to_map) {
$attributes[$to_map] = $values;
}
if (!$this->duplicate && !in_array($name, $this->map[$name], TRUE)) {
unset($attributes[$name]);
}
}
}
}
}
}
?>
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