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<?php /** * ASN1 Signature Handler * * PHP version 5 * * Handles signatures in the format described in * https://tools.ietf.org/html/rfc3279#section-2.2.2 * * @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\DSA\Formats\Signature; use phpseclib3\File\ASN1 as Encoder; use phpseclib3\File\ASN1\Maps; use phpseclib3\Math\BigInteger; /** * ASN1 Signature Handler * * @author Jim Wigginton <terrafrost@php.net> */ abstract class ASN1 { /** * Loads a signature * * @param string $sig * @return array|bool */ public static function load($sig) { if (!is_string($sig)) { return false; } $decoded = Encoder::decodeBER($sig); if (empty($decoded)) { return false; } $components = Encoder::asn1map($decoded[0], Maps\DssSigValue::MAP); return $components; } /** * Returns a signature in the appropriate format * * @param \phpseclib3\Math\BigInteger $r * @param \phpseclib3\Math\BigInteger $s * @return string */ public static function save(BigInteger $r, BigInteger $s) { return Encoder::encodeDER(compact('r', 's'), Maps\DssSigValue::MAP); } }