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<?php
/**
* Raw Signature Handler
*
* PHP version 5
*
* Handles signatures as arrays
*
* @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 phpseclib3\Crypt\Common\Formats\Signature;
use phpseclib3\Math\BigInteger;
/**
* Raw Signature Handler
*
* @package Common
* @author Jim Wigginton <terrafrost@php.net>
* @access public
*/
abstract class Raw
{
/**
* Loads a signature
*
* @access public
* @param array $sig
* @return array|bool
*/
public static function load($sig)
{
switch (true) {
case !is_array($sig):
case !isset($sig['r']) || !isset($sig['s']):
case !$sig['r'] instanceof BigInteger:
case !$sig['s'] instanceof BigInteger:
return false;
}
return [
'r' => $sig['r'],
's' => $sig['s']
];
}
/**
* Returns a signature in the appropriate format
*
* @access public
* @param \phpseclib3\Math\BigInteger $r
* @param \phpseclib3\Math\BigInteger $s
* @return string
*/
public static function save(BigInteger $r, BigInteger $s)
{
return compact('r', 's');
}
}