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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Validate
* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id$
*/
/**
* @see Zend_Validate_Abstract
*/
require_once 'Zend/Validate/Abstract.php';
/**
* Validator for the hash of given files
*
* @category Zend
* @package Zend_Validate
* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Validate_File_Hash extends Zend_Validate_Abstract
{
/**
* @const string Error constants
*/
const DOES_NOT_MATCH = 'fileHashDoesNotMatch';
const NOT_DETECTED = 'fileHashHashNotDetected';
const NOT_FOUND = 'fileHashNotFound';
/**
* @var array Error message templates
*/
protected $_messageTemplates = array(
self::DOES_NOT_MATCH => "File '%value%' does not match the given hashes",
self::NOT_DETECTED => "A hash could not be evaluated for the given file",
self::NOT_FOUND => "File '%value%' is not readable or does not exist"
);
/**
* Hash of the file
*
* @var string
*/
protected $_hash;
/**
* Sets validator options
*
* @param string|array $options
* @return void
*/
public function __construct($options)
{
if ($options instanceof Zend_Config) {
$options = $options->toArray();
} elseif (is_scalar($options)) {
$options = array('hash1' => $options);
} elseif (!is_array($options)) {
require_once 'Zend/Validate/Exception.php';
throw new Zend_Validate_Exception('Invalid options to validator provided');
}
if (1 < func_num_args()) {
$options['algorithm'] = func_get_arg(1);
}
$this->setHash($options);
}
/**
* Returns the set hash values as array, the hash as key and the algorithm the value
*
* @return array
*/
public function getHash()
{
return $this->_hash;
}
/**
* Sets the hash for one or multiple files
*
* @param string|array $options
* @return Zend_Validate_File_Hash Provides a fluent interface
*/
public function setHash($options)
{
$this->_hash = null;
$this->addHash($options);
return $this;
}
/**
* Adds the hash for one or multiple files
*
* @param string|array $options
* @return Zend_Validate_File_Hash Provides a fluent interface
*/
public function addHash($options)
{
if (is_string($options)) {
$options = array($options);
} else if (!is_array($options)) {
require_once 'Zend/Validate/Exception.php';
throw new Zend_Validate_Exception("False parameter given");
}
$known = hash_algos();
if (!isset($options['algorithm'])) {
$algorithm = 'crc32';
} else {
$algorithm = $options['algorithm'];
unset($options['algorithm']);
}
if (!in_array($algorithm, $known)) {
require_once 'Zend/Validate/Exception.php';
throw new Zend_Validate_Exception("Unknown algorithm '{$algorithm}'");
}
foreach ($options as $value) {
$this->_hash[$value] = $algorithm;
}
return $this;
}
/**
* Defined by Zend_Validate_Interface
*
* Returns true if and only if the given file confirms the set hash
*
* @param string $value Filename to check for hash
* @param array $file File data from Zend_File_Transfer
* @return boolean
*/
public function isValid($value, $file = null)
{
// Is file readable ?
require_once 'Zend/Loader.php';
if (!Zend_Loader::isReadable($value)) {
return $this->_throw($file, self::NOT_FOUND);
}
$algos = array_unique(array_values($this->_hash));
$hashes = array_unique(array_keys($this->_hash));
foreach ($algos as $algorithm) {
$filehash = hash_file($algorithm, $value);
if ($filehash === false) {
return $this->_throw($file, self::NOT_DETECTED);
}
foreach($hashes as $hash) {
if ($filehash === $hash) {
return true;
}
}
}
return $this->_throw($file, self::DOES_NOT_MATCH);
}
/**
* Throws an error of the given type
*
* @param string $file
* @param string $errorType
* @return false
*/
protected function _throw($file, $errorType)
{
if ($file !== null) {
$this->_value = $file['name'];
}
$this->_error($errorType);
return false;
}
}
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