148 lines
4.7 KiB
PHP
148 lines
4.7 KiB
PHP
<?php
|
|
/**
|
|
* XML Formatted RSA Key Handler
|
|
*
|
|
* More info:
|
|
*
|
|
* http://www.w3.org/TR/xmldsig-core/#sec-RSAKeyValue
|
|
* http://en.wikipedia.org/wiki/XML_Signature
|
|
*
|
|
* PHP version 5
|
|
*
|
|
* @category Crypt
|
|
* @package RSA
|
|
* @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\RSA;
|
|
|
|
use ParagonIE\ConstantTime\Base64;
|
|
use phpseclib\Math\BigInteger;
|
|
|
|
/**
|
|
* XML Formatted RSA Key Handler
|
|
*
|
|
* @package RSA
|
|
* @author Jim Wigginton <terrafrost@php.net>
|
|
* @access public
|
|
*/
|
|
class XML
|
|
{
|
|
/**
|
|
* Break a public or private key down into its constituent components
|
|
*
|
|
* @access public
|
|
* @param string $key
|
|
* @param string $password optional
|
|
* @return array
|
|
*/
|
|
static function load($key, $password = '')
|
|
{
|
|
if (!is_string($key)) {
|
|
return false;
|
|
}
|
|
|
|
$components = array(
|
|
'isPublicKey' => false,
|
|
'primes' => array(),
|
|
'exponents' => array(),
|
|
'coefficients' => array()
|
|
);
|
|
|
|
$use_errors = libxml_use_internal_errors(true);
|
|
|
|
$dom = new \DOMDocument();
|
|
if (!$dom->loadXML('<xml>' . $key . '</xml>')) {
|
|
return false;
|
|
}
|
|
$xpath = new \DOMXPath($dom);
|
|
$keys = array('modulus', 'exponent', 'p', 'q', 'dp', 'dq', 'inverseq', 'd');
|
|
foreach ($keys as $key) {
|
|
// $dom->getElementsByTagName($key) is case-sensitive
|
|
$temp = $xpath->query("//*[translate(local-name(), 'ABCDEFGHIJKLMNOPQRSTUVWXYZ','abcdefghijklmnopqrstuvwxyz')='$key']");
|
|
if (!$temp->length) {
|
|
continue;
|
|
}
|
|
$value = new BigInteger(Base64::decode($temp->item(0)->nodeValue), 256);
|
|
switch ($key) {
|
|
case 'modulus':
|
|
$components['modulus'] = $value;
|
|
break;
|
|
case 'exponent':
|
|
$components['publicExponent'] = $value;
|
|
break;
|
|
case 'p':
|
|
$components['primes'][1] = $value;
|
|
break;
|
|
case 'q':
|
|
$components['primes'][2] = $value;
|
|
break;
|
|
case 'dp':
|
|
$components['exponents'][1] = $value;
|
|
break;
|
|
case 'dq':
|
|
$components['exponents'][2] = $value;
|
|
break;
|
|
case 'inverseq':
|
|
$components['coefficients'][2] = $value;
|
|
break;
|
|
case 'd':
|
|
$components['privateExponent'] = $value;
|
|
}
|
|
}
|
|
|
|
libxml_use_internal_errors($use_errors);
|
|
|
|
return isset($components['modulus']) && isset($components['publicExponent']) ? $components : false;
|
|
}
|
|
|
|
/**
|
|
* Convert a private key to the appropriate format.
|
|
*
|
|
* @access public
|
|
* @param \phpseclib\Math\BigInteger $n
|
|
* @param \phpseclib\Math\BigInteger $e
|
|
* @param \phpseclib\Math\BigInteger $d
|
|
* @param array $primes
|
|
* @param array $exponents
|
|
* @param array $coefficients
|
|
* @param string $password optional
|
|
* @return string
|
|
*/
|
|
static function savePrivateKey(BigInteger $n, BigInteger $e, BigInteger $d, $primes, $exponents, $coefficients, $password = '')
|
|
{
|
|
if (count($primes) != 2) {
|
|
return false;
|
|
}
|
|
return "<RSAKeyValue>\r\n" .
|
|
' <Modulus>' . Base64::encode($n->toBytes()) . "</Modulus>\r\n" .
|
|
' <Exponent>' . Base64::encode($e->toBytes()) . "</Exponent>\r\n" .
|
|
' <P>' . Base64::encode($primes[1]->toBytes()) . "</P>\r\n" .
|
|
' <Q>' . Base64::encode($primes[2]->toBytes()) . "</Q>\r\n" .
|
|
' <DP>' . Base64::encode($exponents[1]->toBytes()) . "</DP>\r\n" .
|
|
' <DQ>' . Base64::encode($exponents[2]->toBytes()) . "</DQ>\r\n" .
|
|
' <InverseQ>' . Base64::encode($coefficients[2]->toBytes()) . "</InverseQ>\r\n" .
|
|
' <D>' . Base64::encode($d->toBytes()) . "</D>\r\n" .
|
|
'</RSAKeyValue>';
|
|
}
|
|
|
|
/**
|
|
* Convert a public key to the appropriate format
|
|
*
|
|
* @access public
|
|
* @param \phpseclib\Math\BigInteger $n
|
|
* @param \phpseclib\Math\BigInteger $e
|
|
* @return string
|
|
*/
|
|
static function savePublicKey(BigInteger $n, BigInteger $e)
|
|
{
|
|
return "<RSAKeyValue>\r\n" .
|
|
' <Modulus>' . Base64::encode($n->toBytes()) . "</Modulus>\r\n" .
|
|
' <Exponent>' . Base64::encode($e->toBytes()) . "</Exponent>\r\n" .
|
|
'</RSAKeyValue>';
|
|
}
|
|
}
|