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827 daniel-mar 1 
<?php
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/**
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 * Raw Signature Handler
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 *
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 * PHP version 5
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 *
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 * Handles signatures as arrays
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 *
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 * @category  Crypt
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 * @package   Common
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 * @author    Jim Wigginton <terrafrost@php.net>
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 * @copyright 2016 Jim Wigginton
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 * @license   http://www.opensource.org/licenses/mit-license.html  MIT License
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 * @link      http://phpseclib.sourceforge.net
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 */
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namespace phpseclib3\Crypt\Common\Formats\Signature;
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use phpseclib3\Math\BigInteger;
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/**
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 * Raw Signature Handler
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 *
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 * @package Common
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 * @author  Jim Wigginton <terrafrost@php.net>
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 * @access  public
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 */
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abstract class Raw
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{
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    /**
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     * Loads a signature
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     *
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     * @access public
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     * @param array $sig
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     * @return array|bool
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     */
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    public static function load($sig)
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    {
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        switch (true) {
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            case !is_array($sig):
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            case !isset($sig['r']) || !isset($sig['s']):
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            case !$sig['r'] instanceof BigInteger:
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            case !$sig['s'] instanceof BigInteger:
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                return false;
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        }
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        return [
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            'r' => $sig['r'],
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            's' => $sig['s']
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        ];
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    }
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    /**
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     * Returns a signature in the appropriate format
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     *
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     * @access public
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     * @param \phpseclib3\Math\BigInteger $r
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     * @param \phpseclib3\Math\BigInteger $s
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     * @return string
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     */
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    public static function save(BigInteger $r, BigInteger $s)
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    {
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        return compact('r', 's');
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    }
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}