backup
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src
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JetBackup
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3rdparty
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phpseclib3
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Crypt
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EC
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Formats
/
Signature
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ASN1.php
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ASN1.php
60 lines
| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * ASN1 Signature Handler |
| 5 | * |
| 6 | * PHP version 5 |
| 7 | * |
| 8 | * Handles signatures in the format described in |
| 9 | * https://tools.ietf.org/html/rfc3279#section-2.2.3 |
| 10 | * |
| 11 | * @author Jim Wigginton <terrafrost@php.net> |
| 12 | * @copyright 2016 Jim Wigginton |
| 13 | * @license http://www.opensource.org/licenses/mit-license.html MIT License |
| 14 | * @link http://phpseclib.sourceforge.net |
| 15 | */ |
| 16 | |
| 17 | declare(strict_types=1); |
| 18 | |
| 19 | namespace phpseclib3\Crypt\EC\Formats\Signature; |
| 20 | |
| 21 | use phpseclib3\File\ASN1 as Encoder; |
| 22 | use phpseclib3\File\ASN1\Maps\EcdsaSigValue; |
| 23 | use phpseclib3\Math\BigInteger; |
| 24 | |
| 25 | /** |
| 26 | * ASN1 Signature Handler |
| 27 | * |
| 28 | * @author Jim Wigginton <terrafrost@php.net> |
| 29 | */ |
| 30 | abstract class ASN1 |
| 31 | { |
| 32 | /** |
| 33 | * Loads a signature |
| 34 | * |
| 35 | * @return array |
| 36 | */ |
| 37 | public static function load(string $sig) |
| 38 | { |
| 39 | if (!is_string($sig)) { |
| 40 | return false; |
| 41 | } |
| 42 | |
| 43 | $decoded = Encoder::decodeBER($sig); |
| 44 | if (empty($decoded)) { |
| 45 | return false; |
| 46 | } |
| 47 | $components = Encoder::asn1map($decoded[0], EcdsaSigValue::MAP); |
| 48 | |
| 49 | return $components; |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Returns a signature in the appropriate format |
| 54 | */ |
| 55 | public static function save(BigInteger $r, BigInteger $s): string |
| 56 | { |
| 57 | return Encoder::encodeDER(compact('r', 's'), EcdsaSigValue::MAP); |
| 58 | } |
| 59 | } |
| 60 |