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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_Crypt
* @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Crypt.php 25024 2012-07-30 15:08:15Z rob $
*/
/**
* @category Zend
* @package Zend_Crypt
* @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Crypt
{
const TYPE_OPENSSL = 'openssl';
const TYPE_HASH = 'hash';
const TYPE_MHASH = 'mhash';
protected static $_type = null;
/**
* @var array
*/
protected static $_supportedAlgosOpenssl = array(
'md2',
'md4',
'mdc2',
'rmd160',
'sha',
'sha1',
'sha224',
'sha256',
'sha384',
'sha512'
);
/**
* @var array
*/
protected static $_supportedAlgosMhash = array(
'adler32',
'crc32',
'crc32b',
'gost',
'haval128',
'haval160',
'haval192',
'haval256',
'md4',
'md5',
'ripemd160',
'sha1',
'sha256',
'tiger',
'tiger128',
'tiger160'
);
/**
* @param string $algorithm
* @param string $data
* @param bool $binaryOutput
* @return unknown
*/
public static function hash($algorithm, $data, $binaryOutput = false)
{
$algorithm = strtolower($algorithm);
if (function_exists($algorithm)) {
return $algorithm($data, $binaryOutput);
}
self::_detectHashSupport($algorithm);
$supportedMethod = '_digest' . ucfirst(self::$_type);
$result = self::$supportedMethod($algorithm, $data, $binaryOutput);
return $result;
}
/**
* @param string $algorithm
* @throws Zend_Crypt_Exception
*/
protected static function _detectHashSupport($algorithm)
{
if (function_exists('hash')) {
self::$_type = self::TYPE_HASH;
if (in_array($algorithm, hash_algos())) {
return;
}
}
if (function_exists('mhash')) {
self::$_type = self::TYPE_MHASH;
if (in_array($algorithm, self::$_supportedAlgosMhash)) {
return;
}
}
if (function_exists('openssl_digest')) {
if ($algorithm == 'ripemd160') {
$algorithm = 'rmd160';
}
self::$_type = self::TYPE_OPENSSL;
if (in_array($algorithm, self::$_supportedAlgosOpenssl)) {
return;
}
}
/**
* @see Zend_Crypt_Exception
*/
require_once 'Zend/Crypt/Exception.php';
throw new Zend_Crypt_Exception('\'' . $algorithm . '\' is not supported by any available extension or native function');
}
/**
* @param string $algorithm
* @param string $data
* @param bool $binaryOutput
* @return string
*/
protected static function _digestHash($algorithm, $data, $binaryOutput)
{
return hash($algorithm, $data, $binaryOutput);
}
/**
* @param string $algorithm
* @param string $data
* @param bool $binaryOutput
* @return string
*/
protected static function _digestMhash($algorithm, $data, $binaryOutput)
{
$constant = constant('MHASH_' . strtoupper($algorithm));
$binary = mhash($constant, $data);
if ($binaryOutput) {
return $binary;
}
return bin2hex($binary);
}
/**
* @param string $algorithm
* @param string $data
* @param bool $binaryOutput
* @return string
*/
protected static function _digestOpenssl($algorithm, $data, $binaryOutput)
{
if ($algorithm == 'ripemd160') {
$algorithm = 'rmd160';
}
return openssl_digest($data, $algorithm, $binaryOutput);
}
}