forked from friendica/friendica-addons
110 lines
3.4 KiB
PHP
110 lines
3.4 KiB
PHP
<?php
|
|
|
|
/**
|
|
* PuTTY Formatted DSA Key Handler
|
|
*
|
|
* puttygen does not generate DSA keys with an N of anything other than 160, however,
|
|
* it can still load them and convert them. PuTTY will load them, too, but SSH servers
|
|
* won't accept them. Since PuTTY formatted keys are primarily used with SSH this makes
|
|
* keys with N > 160 kinda useless, hence this handlers not supporting such keys.
|
|
*
|
|
* PHP version 5
|
|
*
|
|
* @author Jim Wigginton <terrafrost@php.net>
|
|
* @copyright 2015 Jim Wigginton
|
|
* @license http://www.opensource.org/licenses/mit-license.html MIT License
|
|
* @link http://phpseclib.sourceforge.net
|
|
*/
|
|
|
|
namespace phpseclib3\Crypt\DSA\Formats\Keys;
|
|
|
|
use phpseclib3\Common\Functions\Strings;
|
|
use phpseclib3\Crypt\Common\Formats\Keys\PuTTY as Progenitor;
|
|
use phpseclib3\Math\BigInteger;
|
|
|
|
/**
|
|
* PuTTY Formatted DSA Key Handler
|
|
*
|
|
* @author Jim Wigginton <terrafrost@php.net>
|
|
*/
|
|
abstract class PuTTY extends Progenitor
|
|
{
|
|
/**
|
|
* Public Handler
|
|
*
|
|
* @var string
|
|
*/
|
|
const PUBLIC_HANDLER = 'phpseclib3\Crypt\DSA\Formats\Keys\OpenSSH';
|
|
|
|
/**
|
|
* Algorithm Identifier
|
|
*
|
|
* @var array
|
|
*/
|
|
protected static $types = ['ssh-dss'];
|
|
|
|
/**
|
|
* Break a public or private key down into its constituent components
|
|
*
|
|
* @param string $key
|
|
* @param string $password optional
|
|
* @return array
|
|
*/
|
|
public static function load($key, $password = '')
|
|
{
|
|
$components = parent::load($key, $password);
|
|
if (!isset($components['private'])) {
|
|
return $components;
|
|
}
|
|
extract($components);
|
|
unset($components['public'], $components['private']);
|
|
|
|
list($p, $q, $g, $y) = Strings::unpackSSH2('iiii', $public);
|
|
list($x) = Strings::unpackSSH2('i', $private);
|
|
|
|
return compact('p', 'q', 'g', 'y', 'x', 'comment');
|
|
}
|
|
|
|
/**
|
|
* Convert a private key to the appropriate format.
|
|
*
|
|
* @param \phpseclib3\Math\BigInteger $p
|
|
* @param \phpseclib3\Math\BigInteger $q
|
|
* @param \phpseclib3\Math\BigInteger $g
|
|
* @param \phpseclib3\Math\BigInteger $y
|
|
* @param \phpseclib3\Math\BigInteger $x
|
|
* @param string $password optional
|
|
* @param array $options optional
|
|
* @return string
|
|
*/
|
|
public static function savePrivateKey(BigInteger $p, BigInteger $q, BigInteger $g, BigInteger $y, BigInteger $x, $password = false, array $options = [])
|
|
{
|
|
if ($q->getLength() != 160) {
|
|
throw new \InvalidArgumentException('SSH only supports keys with an N (length of Group Order q) of 160');
|
|
}
|
|
|
|
$public = Strings::packSSH2('iiii', $p, $q, $g, $y);
|
|
$private = Strings::packSSH2('i', $x);
|
|
|
|
return self::wrapPrivateKey($public, $private, 'ssh-dss', $password, $options);
|
|
}
|
|
|
|
/**
|
|
* Convert a public key to the appropriate format
|
|
*
|
|
* @param \phpseclib3\Math\BigInteger $p
|
|
* @param \phpseclib3\Math\BigInteger $q
|
|
* @param \phpseclib3\Math\BigInteger $g
|
|
* @param \phpseclib3\Math\BigInteger $y
|
|
* @return string
|
|
*/
|
|
public static function savePublicKey(BigInteger $p, BigInteger $q, BigInteger $g, BigInteger $y)
|
|
{
|
|
if ($q->getLength() != 160) {
|
|
throw new \InvalidArgumentException('SSH only supports keys with an N (length of Group Order q) of 160');
|
|
}
|
|
|
|
return self::wrapPublicKey(Strings::packSSH2('iiii', $p, $q, $g, $y), 'ssh-dss');
|
|
}
|
|
}
|