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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 827 | daniel-mar | 1 | <?php |
| 2 | |||
| 3 | /** |
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| 4 | * ASN1 Signature Handler |
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| 5 | * |
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| 6 | * PHP version 5 |
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| 7 | * |
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| 8 | * Handles signatures in the format described in |
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| 9 | * https://tools.ietf.org/html/rfc3279#section-2.2.2 |
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| 10 | * |
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| 874 | daniel-mar | 11 | * @category Crypt |
| 12 | * @package Common |
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| 827 | daniel-mar | 13 | * @author Jim Wigginton <terrafrost@php.net> |
| 14 | * @copyright 2016 Jim Wigginton |
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| 15 | * @license http://www.opensource.org/licenses/mit-license.html MIT License |
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| 16 | * @link http://phpseclib.sourceforge.net |
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| 17 | */ |
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| 18 | |||
| 19 | namespace phpseclib3\Crypt\DSA\Formats\Signature; |
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| 20 | |||
| 21 | use phpseclib3\File\ASN1 as Encoder; |
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| 22 | use phpseclib3\File\ASN1\Maps; |
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| 23 | use phpseclib3\Math\BigInteger; |
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| 24 | |||
| 25 | /** |
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| 26 | * ASN1 Signature Handler |
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| 27 | * |
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| 874 | daniel-mar | 28 | * @package Common |
| 827 | daniel-mar | 29 | * @author Jim Wigginton <terrafrost@php.net> |
| 874 | daniel-mar | 30 | * @access public |
| 827 | daniel-mar | 31 | */ |
| 32 | abstract class ASN1 |
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| 33 | { |
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| 34 | /** |
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| 35 | * Loads a signature |
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| 36 | * |
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| 874 | daniel-mar | 37 | * @access public |
| 827 | daniel-mar | 38 | * @param string $sig |
| 39 | * @return array|bool |
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| 40 | */ |
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| 41 | public static function load($sig) |
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| 42 | { |
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| 43 | if (!is_string($sig)) { |
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| 44 | return false; |
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| 45 | } |
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| 46 | |||
| 47 | $decoded = Encoder::decodeBER($sig); |
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| 48 | if (empty($decoded)) { |
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| 49 | return false; |
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| 50 | } |
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| 51 | $components = Encoder::asn1map($decoded[0], Maps\DssSigValue::MAP); |
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| 52 | |||
| 53 | return $components; |
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| 54 | } |
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| 55 | |||
| 56 | /** |
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| 57 | * Returns a signature in the appropriate format |
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| 58 | * |
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| 874 | daniel-mar | 59 | * @access public |
| 827 | daniel-mar | 60 | * @param \phpseclib3\Math\BigInteger $r |
| 61 | * @param \phpseclib3\Math\BigInteger $s |
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| 62 | * @return string |
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| 63 | */ |
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| 64 | public static function save(BigInteger $r, BigInteger $s) |
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| 65 | { |
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| 66 | return Encoder::encodeDER(compact('r', 's'), Maps\DssSigValue::MAP); |
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| 67 | } |
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| 68 | } |