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| Rev | Author | Line No. | Line |
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| 827 | daniel-mar | 1 | <?php |
| 2 | |||
| 3 | /** |
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| 4 | * PuTTY Formatted DSA Key Handler |
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| 5 | * |
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| 6 | * puttygen does not generate DSA keys with an N of anything other than 160, however, |
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| 7 | * it can still load them and convert them. PuTTY will load them, too, but SSH servers |
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| 8 | * won't accept them. Since PuTTY formatted keys are primarily used with SSH this makes |
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| 9 | * keys with N > 160 kinda useless, hence this handlers not supporting such keys. |
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| 10 | * |
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| 11 | * PHP version 5 |
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| 12 | * |
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| 874 | daniel-mar | 13 | * @category Crypt |
| 14 | * @package DSA |
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| 827 | daniel-mar | 15 | * @author Jim Wigginton <terrafrost@php.net> |
| 16 | * @copyright 2015 Jim Wigginton |
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| 17 | * @license http://www.opensource.org/licenses/mit-license.html MIT License |
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| 18 | * @link http://phpseclib.sourceforge.net |
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| 19 | */ |
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| 20 | |||
| 21 | namespace phpseclib3\Crypt\DSA\Formats\Keys; |
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| 22 | |||
| 23 | use phpseclib3\Common\Functions\Strings; |
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| 24 | use phpseclib3\Crypt\Common\Formats\Keys\PuTTY as Progenitor; |
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| 25 | use phpseclib3\Math\BigInteger; |
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| 26 | |||
| 27 | /** |
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| 28 | * PuTTY Formatted DSA Key Handler |
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| 29 | * |
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| 874 | daniel-mar | 30 | * @package DSA |
| 827 | daniel-mar | 31 | * @author Jim Wigginton <terrafrost@php.net> |
| 874 | daniel-mar | 32 | * @access public |
| 827 | daniel-mar | 33 | */ |
| 34 | abstract class PuTTY extends Progenitor |
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| 35 | { |
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| 36 | /** |
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| 37 | * Public Handler |
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| 38 | * |
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| 39 | * @var string |
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| 874 | daniel-mar | 40 | * @access private |
| 827 | daniel-mar | 41 | */ |
| 42 | const PUBLIC_HANDLER = 'phpseclib3\Crypt\DSA\Formats\Keys\OpenSSH'; |
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| 43 | |||
| 44 | /** |
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| 45 | * Algorithm Identifier |
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| 46 | * |
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| 47 | * @var array |
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| 874 | daniel-mar | 48 | * @access private |
| 827 | daniel-mar | 49 | */ |
| 50 | protected static $types = ['ssh-dss']; |
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| 51 | |||
| 52 | /** |
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| 53 | * Break a public or private key down into its constituent components |
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| 54 | * |
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| 874 | daniel-mar | 55 | * @access public |
| 827 | daniel-mar | 56 | * @param string $key |
| 57 | * @param string $password optional |
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| 58 | * @return array |
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| 59 | */ |
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| 60 | public static function load($key, $password = '') |
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| 61 | { |
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| 62 | $components = parent::load($key, $password); |
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| 63 | if (!isset($components['private'])) { |
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| 64 | return $components; |
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| 65 | } |
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| 66 | extract($components); |
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| 67 | unset($components['public'], $components['private']); |
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| 68 | |||
| 69 | list($p, $q, $g, $y) = Strings::unpackSSH2('iiii', $public); |
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| 70 | list($x) = Strings::unpackSSH2('i', $private); |
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| 71 | |||
| 72 | return compact('p', 'q', 'g', 'y', 'x', 'comment'); |
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| 73 | } |
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| 74 | |||
| 75 | /** |
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| 76 | * Convert a private key to the appropriate format. |
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| 77 | * |
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| 874 | daniel-mar | 78 | * @access public |
| 827 | daniel-mar | 79 | * @param \phpseclib3\Math\BigInteger $p |
| 80 | * @param \phpseclib3\Math\BigInteger $q |
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| 81 | * @param \phpseclib3\Math\BigInteger $g |
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| 82 | * @param \phpseclib3\Math\BigInteger $y |
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| 83 | * @param \phpseclib3\Math\BigInteger $x |
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| 84 | * @param string $password optional |
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| 85 | * @param array $options optional |
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| 86 | * @return string |
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| 87 | */ |
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| 88 | public static function savePrivateKey(BigInteger $p, BigInteger $q, BigInteger $g, BigInteger $y, BigInteger $x, $password = false, array $options = []) |
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| 89 | { |
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| 90 | if ($q->getLength() != 160) { |
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| 91 | throw new \InvalidArgumentException('SSH only supports keys with an N (length of Group Order q) of 160'); |
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| 92 | } |
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| 93 | |||
| 94 | $public = Strings::packSSH2('iiii', $p, $q, $g, $y); |
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| 95 | $private = Strings::packSSH2('i', $x); |
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| 96 | |||
| 97 | return self::wrapPrivateKey($public, $private, 'ssh-dsa', $password, $options); |
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| 98 | } |
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| 99 | |||
| 100 | /** |
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| 101 | * Convert a public key to the appropriate format |
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| 102 | * |
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| 874 | daniel-mar | 103 | * @access public |
| 827 | daniel-mar | 104 | * @param \phpseclib3\Math\BigInteger $p |
| 105 | * @param \phpseclib3\Math\BigInteger $q |
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| 106 | * @param \phpseclib3\Math\BigInteger $g |
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| 107 | * @param \phpseclib3\Math\BigInteger $y |
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| 108 | * @return string |
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| 109 | */ |
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| 110 | public static function savePublicKey(BigInteger $p, BigInteger $q, BigInteger $g, BigInteger $y) |
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| 111 | { |
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| 112 | if ($q->getLength() != 160) { |
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| 113 | throw new \InvalidArgumentException('SSH only supports keys with an N (length of Group Order q) of 160'); |
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| 114 | } |
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| 115 | |||
| 116 | return self::wrapPublicKey(Strings::packSSH2('iiii', $p, $q, $g, $y), 'ssh-dsa'); |
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| 117 | } |
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| 118 | } |