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PKCS1.php
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PKCS1.php
77 lines
| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * "PKCS1" Formatted EC Key Handler |
| 5 | * |
| 6 | * PHP version 5 |
| 7 | * |
| 8 | * Processes keys with the following headers: |
| 9 | * |
| 10 | * -----BEGIN DH PARAMETERS----- |
| 11 | * |
| 12 | * Technically, PKCS1 is for RSA keys, only, but we're using PKCS1 to describe |
| 13 | * DSA, whose format isn't really formally described anywhere, so might as well |
| 14 | * use it to describe this, too. |
| 15 | * |
| 16 | * @author Jim Wigginton <terrafrost@php.net> |
| 17 | * @copyright 2015 Jim Wigginton |
| 18 | * @license http://www.opensource.org/licenses/mit-license.html MIT License |
| 19 | * @link http://phpseclib.sourceforge.net |
| 20 | */ |
| 21 | |
| 22 | declare(strict_types=1); |
| 23 | |
| 24 | namespace phpseclib3\Crypt\DH\Formats\Keys; |
| 25 | |
| 26 | use phpseclib3\Crypt\Common\Formats\Keys\PKCS1 as Progenitor; |
| 27 | use phpseclib3\Exception\RuntimeException; |
| 28 | use phpseclib3\File\ASN1; |
| 29 | use phpseclib3\File\ASN1\Maps; |
| 30 | use phpseclib3\Math\BigInteger; |
| 31 | |
| 32 | /** |
| 33 | * "PKCS1" Formatted DH Key Handler |
| 34 | * |
| 35 | * @author Jim Wigginton <terrafrost@php.net> |
| 36 | */ |
| 37 | abstract class PKCS1 extends Progenitor |
| 38 | { |
| 39 | /** |
| 40 | * Break a public or private key down into its constituent components |
| 41 | * |
| 42 | * @param string|array $key |
| 43 | */ |
| 44 | public static function load($key, ?string $password = null): array |
| 45 | { |
| 46 | $key = parent::load($key, $password); |
| 47 | |
| 48 | $decoded = ASN1::decodeBER($key); |
| 49 | if (!$decoded) { |
| 50 | throw new RuntimeException('Unable to decode BER'); |
| 51 | } |
| 52 | |
| 53 | $components = ASN1::asn1map($decoded[0], Maps\DHParameter::MAP); |
| 54 | if (!is_array($components)) { |
| 55 | throw new RuntimeException('Unable to perform ASN1 mapping on parameters'); |
| 56 | } |
| 57 | |
| 58 | return $components; |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * Convert EC parameters to the appropriate format |
| 63 | */ |
| 64 | public static function saveParameters(BigInteger $prime, BigInteger $base, array $options = []): string |
| 65 | { |
| 66 | $params = [ |
| 67 | 'prime' => $prime, |
| 68 | 'base' => $base, |
| 69 | ]; |
| 70 | $params = ASN1::encodeDER($params, Maps\DHParameter::MAP); |
| 71 | |
| 72 | return "-----BEGIN DH PARAMETERS-----\r\n" . |
| 73 | chunk_split(base64_encode($params), 64) . |
| 74 | "-----END DH PARAMETERS-----\r\n"; |
| 75 | } |
| 76 | } |
| 77 |