WebSVN – oidplus – Blame – /trunk/vendor/phpseclib/phpseclib/phpseclib/Crypt/EC/Formats/Keys/PuTTY.php

Rev	Author	Line No.	Line
827	daniel-mar	1	<?php
		2
		3	/**
		4	* PuTTY Formatted EC Key Handler
		5	*
		6	* PHP version 5
		7	*
874	daniel-mar	8	* @category Crypt
		9	* @package EC
827	daniel-mar	10	* @author Jim Wigginton <terrafrost@php.net>
		11	* @copyright 2015 Jim Wigginton
		12	* @license http://www.opensource.org/licenses/mit-license.html MIT License
		13	* @link http://phpseclib.sourceforge.net
		14	*/
		15
		16	namespace phpseclib3\Crypt\EC\Formats\Keys;
		17
		18	use ParagonIE\ConstantTime\Base64;
		19	use phpseclib3\Common\Functions\Strings;
		20	use phpseclib3\Crypt\Common\Formats\Keys\PuTTY as Progenitor;
		21	use phpseclib3\Crypt\EC\BaseCurves\Base as BaseCurve;
		22	use phpseclib3\Crypt\EC\BaseCurves\TwistedEdwards as TwistedEdwardsCurve;
		23	use phpseclib3\Math\BigInteger;
		24
		25	/**
		26	* PuTTY Formatted EC Key Handler
		27	*
874	daniel-mar	28	* @package EC
827	daniel-mar	29	* @author Jim Wigginton <terrafrost@php.net>
874	daniel-mar	30	* @access public
827	daniel-mar	31	*/
		32	abstract class PuTTY extends Progenitor
		33	{
		34	use Common;
		35
		36	/**
		37	* Public Handler
		38	*
		39	* @var string
874	daniel-mar	40	* @access private
827	daniel-mar	41	*/
		42	const PUBLIC_HANDLER = 'phpseclib3\Crypt\EC\Formats\Keys\OpenSSH';
		43
		44	/**
		45	* Supported Key Types
		46	*
		47	* @var array
874	daniel-mar	48	* @access private
827	daniel-mar	49	*/
		50	protected static $types = [
		51	'ecdsa-sha2-nistp256',
		52	'ecdsa-sha2-nistp384',
		53	'ecdsa-sha2-nistp521',
		54	'ssh-ed25519'
		55	];
		56
		57	/**
		58	* Break a public or private key down into its constituent components
		59	*
874	daniel-mar	60	* @access public
827	daniel-mar	61	* @param string $key
		62	* @param string $password optional
		63	* @return array
		64	*/
		65	public static function load($key, $password = '')
		66	{
		67	$components = parent::load($key, $password);
		68	if (!isset($components['private'])) {
		69	return $components;
		70	}
		71
		72	$private = $components['private'];
		73
		74	$temp = Base64::encode(Strings::packSSH2('s', $components['type']) . $components['public']);
		75	$components = OpenSSH::load($components['type'] . ' ' . $temp . ' ' . $components['comment']);
		76
		77	if ($components['curve'] instanceof TwistedEdwardsCurve) {
		78	if (Strings::shift($private, 4) != "\0\0\0\x20") {
		79	throw new \RuntimeException('Length of ssh-ed25519 key should be 32');
		80	}
		81	$components['dA'] = $components['curve']->extractSecret($private);
		82	} else {
		83	list($components['dA']) = Strings::unpackSSH2('i', $private);
		84	$components['curve']->rangeCheck($components['dA']);
		85	}
		86
		87	return $components;
		88	}
		89
		90	/**
		91	* Convert a private key to the appropriate format.
		92	*
874	daniel-mar	93	* @access public
827	daniel-mar	94	* @param \phpseclib3\Math\BigInteger $privateKey
		95	* @param \phpseclib3\Crypt\EC\BaseCurves\Base $curve
		96	* @param \phpseclib3\Math\Common\FiniteField\Integer[] $publicKey
		97	* @param string $password optional
		98	* @param array $options optional
		99	* @return string
		100	*/
		101	public static function savePrivateKey(BigInteger $privateKey, BaseCurve $curve, array $publicKey, $password = false, array $options = [])
		102	{
		103	self::initialize_static_variables();
		104
		105	$public = explode(' ', OpenSSH::savePublicKey($curve, $publicKey));
		106	$name = $public[0];
		107	$public = Base64::decode($public[1]);
		108	list(, $length) = unpack('N', Strings::shift($public, 4));
		109	Strings::shift($public, $length);
		110
		111	// PuTTY pads private keys with a null byte per the following:
		112	// https://github.com/github/putty/blob/a3d14d77f566a41fc61dfdc5c2e0e384c9e6ae8b/sshecc.c#L1926
		113	if (!$curve instanceof TwistedEdwardsCurve) {
		114	$private = $privateKey->toBytes();
		115	if (!(strlen($privateKey->toBits()) & 7)) {
		116	$private = "\0$private";
		117	}
		118	}
		119
		120	$private = $curve instanceof TwistedEdwardsCurve ?
		121	Strings::packSSH2('s', $privateKey->secret) :
		122	Strings::packSSH2('s', $private);
		123
		124	return self::wrapPrivateKey($public, $private, $name, $password, $options);
		125	}
		126
		127	/**
		128	* Convert an EC public key to the appropriate format
		129	*
874	daniel-mar	130	* @access public
827	daniel-mar	131	* @param \phpseclib3\Crypt\EC\BaseCurves\Base $curve
		132	* @param \phpseclib3\Math\Common\FiniteField[] $publicKey
		133	* @return string
		134	*/
		135	public static function savePublicKey(BaseCurve $curve, array $publicKey)
		136	{
		137	$public = explode(' ', OpenSSH::savePublicKey($curve, $publicKey));
		138	$type = $public[0];
		139	$public = Base64::decode($public[1]);
		140	list(, $length) = unpack('N', Strings::shift($public, 4));
		141	Strings::shift($public, $length);
		142
		143	return self::wrapPublicKey($public, $type);
		144	}
		145	}

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oidplus/trunk/vendor/phpseclib/phpseclib/phpseclib/Crypt/EC/Formats/Keys/PuTTY.php – Rev 874