mirror of
https://github.com/danog/tgseclib.git
synced 2024-12-13 09:37:39 +01:00
69 lines
1.5 KiB
PHP
69 lines
1.5 KiB
PHP
<?php
|
|
|
|
/**
|
|
* ASN1 Signature Handler
|
|
*
|
|
* PHP version 5
|
|
*
|
|
* Handles signatures in the format described in
|
|
* https://tools.ietf.org/html/rfc3279#section-2.2.2
|
|
*
|
|
* @category Crypt
|
|
* @package Common
|
|
* @author Jim Wigginton <terrafrost@php.net>
|
|
* @copyright 2016 Jim Wigginton
|
|
* @license http://www.opensource.org/licenses/mit-license.html MIT License
|
|
* @link http://phpseclib.sourceforge.net
|
|
*/
|
|
|
|
namespace phpseclib\Crypt\DSA\Signature;
|
|
|
|
use phpseclib\Math\BigInteger;
|
|
use phpseclib\File\ASN1 as Encoder;
|
|
use phpseclib\File\ASN1\Maps;
|
|
|
|
/**
|
|
* ASN1 Signature Handler
|
|
*
|
|
* @package Common
|
|
* @author Jim Wigginton <terrafrost@php.net>
|
|
* @access public
|
|
*/
|
|
abstract class ASN1
|
|
{
|
|
/**
|
|
* Loads a signature
|
|
*
|
|
* @access public
|
|
* @param string $sig
|
|
* @return array|bool
|
|
*/
|
|
public static function load($sig)
|
|
{
|
|
if (!is_string($sig)) {
|
|
return false;
|
|
}
|
|
|
|
$decoded = Encoder::decodeBER($sig);
|
|
if (empty($decoded)) {
|
|
return false;
|
|
}
|
|
$components = Encoder::asn1map($decoded[0], Maps\DssSigValue::MAP);
|
|
|
|
return $components;
|
|
}
|
|
|
|
/**
|
|
* Returns a signature in the appropriate format
|
|
*
|
|
* @access public
|
|
* @param \phpseclib\Math\BigInteger $r
|
|
* @param \phpseclib\Math\BigInteger $s
|
|
* @return string
|
|
*/
|
|
public static function save(BigInteger $r, BigInteger $s)
|
|
{
|
|
return ASN1::encodeDER(compact('r', 's'), Maps\DssSigValue::MAP);
|
|
}
|
|
}
|