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tgseclib/phpseclib/Crypt/DSA/Keys/PKCS1.php

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2016-12-23 17:02:07 +01:00
<?php
/**
* PKCS#1 Formatted DSA Key Handler
*
* PHP version 5
*
* Used by File/X509.php
*
* Processes keys with the following headers:
*
* -----BEGIN DSA PRIVATE KEY-----
* -----BEGIN DSA PUBLIC KEY-----
* -----BEGIN DSA PARAMETERS-----
*
* Analogous to ssh-keygen's pem format (as specified by -m)
*
* @category Crypt
* @package DSA
* @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 phpseclib\Crypt\DSA\Keys;
use phpseclib\Math\BigInteger;
use phpseclib\Crypt\Common\Keys\PKCS1 as Progenitor;
use phpseclib\File\ASN1;
use phpseclib\File\ASN1\Maps;
use ParagonIE\ConstantTime\Base64;
/**
* PKCS#1 Formatted RSA Key Handler
*
* @package RSA
* @author Jim Wigginton <terrafrost@php.net>
* @access public
*/
abstract class PKCS1 extends Progenitor
{
/**
* Break a public or private key down into its constituent components
*
* @access public
* @param string $key
* @param string $password optional
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* @return array|bool
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*/
public static function load($key, $password = '')
{
if (!is_string($key)) {
return false;
}
$key = parent::load($key, $password);
if ($key === false) {
return false;
}
$decoded = ASN1::decodeBER($key);
if (empty($decoded)) {
return false;
}
$key = ASN1::asn1map($decoded[0], Maps\DSAParams::MAP);
if (is_array($key)) {
return $key;
}
$key = ASN1::asn1map($decoded[0], Maps\DSAPrivateKey::MAP);
if (is_array($key)) {
return $key;
}
$key = ASN1::asn1map($decoded[0], Maps\DSAPublicKey::MAP);
return is_array($key) ? $key : false;
}
/**
* Convert DSA parameters to the appropriate format
*
* @access public
* @param \phpseclib\Math\BigInteger $p
* @param \phpseclib\Math\BigInteger $q
* @param \phpseclib\Math\BigInteger $g
* @return string
*/
public static function saveParameters(BigInteger $p, BigInteger $q, BigInteger $g)
{
$key = [
'p' => $p,
'q' => $q,
'g' => $g
];
$key = ASN1::encodeDER($key, Maps\DSAParams::MAP);
return "-----BEGIN DSA PARAMETERS-----\r\n" .
chunk_split(Base64::encode($key), 64) .
"-----END DSA PARAMETERS-----\r\n";
}
/**
* Convert a private key to the appropriate format.
*
* @access public
* @param \phpseclib\Math\BigInteger $p
* @param \phpseclib\Math\BigInteger $q
* @param \phpseclib\Math\BigInteger $g
* @param \phpseclib\Math\BigInteger $x
* @param \phpseclib\Math\BigInteger $y
* @param string $password optional
* @return string
*/
public static function savePrivateKey(BigInteger $p, BigInteger $q, BigInteger $g, BigInteger $y, BigInteger $x, $password = '')
{
$key = [
'version' => 0,
'p' => $p,
'q' => $q,
'g' => $g,
'y' => $y,
'x' => $x
];
$key = ASN1::encodeDER($key, Maps\DSAPrivateKey::MAP);
return self::wrapPrivateKey($key, 'DSA', $password);
}
/**
* Convert a public key to the appropriate format
*
* @access public
* @param \phpseclib\Math\BigInteger $p
* @param \phpseclib\Math\BigInteger $q
* @param \phpseclib\Math\BigInteger $g
* @param \phpseclib\Math\BigInteger $y
* @return string
*/
public static function savePublicKey(BigInteger $p, BigInteger $q, BigInteger $g, BigInteger $y)
{
$key = ASN1::encodeDER($y, Maps\DSAPublicKey::MAP);
return self::wrapPublicKey($key, 'DSA');
}
}