Viewing file:  AttributeAlter.php (3.14 KB) -rw-r--r--
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<?php
/**
* Filter to modify attributes using regular expressions
*
* This filter can modify or replace attributes given a regular expression.
*
* @author Jacob Christiansen, WAYF
* @package simpleSAMLphp
* @version $Id: AttributeAlter.php 2244 2010-03-29 13:05:20Z jach@wayf.dk $
*/
class sspmod_core_Auth_Process_AttributeAlter extends SimpleSAML_Auth_ProcessingFilter {
/**
* Should found pattern be replace
*/
private $replace = FALSE;
/**
* Pattern to be search for.
*/
private $pattern = '';
/**
* String to replace found pattern.
*/
private $replacement = '';
/**
* Attribute to search in
*/
private $subject = '';
/**
* Attribute to place result in.
*/
private $target = '';
/**
* Initialize this filter.
*
* @param array $config Configuration information about this filter.
* @param mixed $reserved For future use.
*/
public function __construct($config, $reserved) {
assert('is_array($config)');
parent::__construct($config, $reserved);
// Parse filter configuration
foreach($config as $name => $value) {
// Is %replace set?
if(is_int($name)) {
if($value == '%replace') {
$this->replace = TRUE;
} else {
throw new Exception('Unknown flag : ' . var_export($value, TRUE));
}
continue;
}
// Unknown flag
if(!is_string($name)) {
throw new Exception('Unknown flag : ' . var_export($name, TRUE));
}
// Set pattern
if($name == 'pattern') {
$this->pattern = $value;
}
// Set replacement
if($name == 'replacement') {
$this->replacement = $value;
}
// Set subject
if($name == 'subject') {
$this->subject = $value;
}
// Set target
if($name == 'target') {
$this->target = $value;
}
}
}
/**
* Apply filter to modify attributes.
*
* Modify existing attributes with the configured values.
*
* @param array &$request The current request
*/
public function process(&$request) {
assert('is_array($request)');
assert('array_key_exists("Attributes", $request)');
// Get attributes from request
$attributes =& $request['Attributes'];
// Check that all required params are set in config
if(empty($this->pattern) || empty($this->subject)) {
throw new Exception("Not all params set in config.");
}
if(!$this->replace && empty($this->replacement)) {
throw new Exception("'replacement' must be set if '%replace' is not set");
}
// Use subject as taget if target is not set
if(empty($this->target)) {
$this->target = $this->subject;
}
// Check if attributes contains subject and target attribute
if (array_key_exists($this->subject, $attributes) && array_key_exists($this->target, $attributes)) {
if($this->replace == TRUE) {
$matches = array();
// Try to match pattern
if(preg_match($this->pattern, $attributes[$this->subject][0], $matches) > 0) {
if(empty($this->replacement)) {
$attributes[$this->target][0] = $matches[0];
} else {
$attributes[$this->target][0] = $this->replacement;
}
}
} else {
$attributes[$this->target] = preg_replace($this->pattern, $this->replacement, $attributes[$this->subject]);
}
}
}
}
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