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<?php |
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ |
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/** |
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* Contains a class representing GPG sub-keys and constants for GPG algorithms |
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* |
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* PHP version 5 |
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* |
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* LICENSE: |
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* |
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* This library is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as |
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* published by the Free Software Foundation; either version 2.1 of the |
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* License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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* @category Encryption |
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* @package Crypt_GPG |
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* @author Michael Gauthier <mike@silverorange.com> |
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* @author Nathan Fredrickson <nathan@silverorange.com> |
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* @copyright 2005-2010 silverorange |
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* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1 |
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* @version CVS: $Id: SubKey.php 302768 2010-08-25 13:45:52Z gauthierm $ |
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* @link http://pear.php.net/package/Crypt_GPG |
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*/ |
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// {{{ class Crypt_GPG_SubKey |
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/** |
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* A class for GPG sub-key information |
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* |
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* This class is used to store the results of the {@link Crypt_GPG::getKeys()} |
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* method. Sub-key objects are members of a {@link Crypt_GPG_Key} object. |
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* |
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* @category Encryption |
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* @package Crypt_GPG |
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* @author Michael Gauthier <mike@silverorange.com> |
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* @author Nathan Fredrickson <nathan@silverorange.com> |
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* @copyright 2005-2010 silverorange |
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* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1 |
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* @link http://pear.php.net/package/Crypt_GPG |
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* @see Crypt_GPG::getKeys() |
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* @see Crypt_GPG_Key::getSubKeys() |
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*/ |
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class Crypt_GPG_SubKey |
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{ |
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// {{{ class constants |
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/** |
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* RSA encryption algorithm. |
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*/ |
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const ALGORITHM_RSA = 1; |
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/** |
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* Elgamal encryption algorithm (encryption only). |
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*/ |
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const ALGORITHM_ELGAMAL_ENC = 16; |
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/** |
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* DSA encryption algorithm (sometimes called DH, sign only). |
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*/ |
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const ALGORITHM_DSA = 17; |
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/** |
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* Elgamal encryption algorithm (signage and encryption - should not be |
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* used). |
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*/ |
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const ALGORITHM_ELGAMAL_ENC_SGN = 20; |
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// }}} |
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// {{{ class properties |
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/** |
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* The id of this sub-key |
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* |
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* @var string |
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*/ |
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private $_id = ''; |
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/** |
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* The algorithm used to create this sub-key |
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* |
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* The value is one of the Crypt_GPG_SubKey::ALGORITHM_* constants. |
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* |
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* @var integer |
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*/ |
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private $_algorithm = 0; |
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/** |
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* The fingerprint of this sub-key |
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* |
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* @var string |
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*/ |
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private $_fingerprint = ''; |
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/** |
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* Length of this sub-key in bits |
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* |
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* @var integer |
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*/ |
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private $_length = 0; |
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/** |
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* Date this sub-key was created |
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* |
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* This is a Unix timestamp. |
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* |
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* @var integer |
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*/ |
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private $_creationDate = 0; |
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/** |
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* Date this sub-key expires |
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* |
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* This is a Unix timestamp. If this sub-key does not expire, this will be |
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* zero. |
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* |
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* @var integer |
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*/ |
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private $_expirationDate = 0; |
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/** |
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* Whether or not this sub-key can sign data |
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* |
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* @var boolean |
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*/ |
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private $_canSign = false; |
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/** |
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* Whether or not this sub-key can encrypt data |
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* |
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* @var boolean |
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*/ |
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private $_canEncrypt = false; |
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/** |
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* Whether or not the private key for this sub-key exists in the keyring |
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* |
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* @var boolean |
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*/ |
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private $_hasPrivate = false; |
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/** |
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* Whether or not this sub-key is revoked |
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* |
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* @var boolean |
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*/ |
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private $_isRevoked = false; |
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// }}} |
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// {{{ __construct() |
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/** |
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* Creates a new sub-key object |
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* |
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* Sub-keys can be initialized from an array of named values. Available |
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* names are: |
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* |
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* - <kbd>string id</kbd> - the key id of the sub-key. |
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* - <kbd>integer algorithm</kbd> - the encryption algorithm of the |
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* sub-key. |
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* - <kbd>string fingerprint</kbd> - the fingerprint of the sub-key. The |
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* fingerprint should not contain |
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* formatting characters. |
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* - <kbd>integer length</kbd> - the length of the sub-key in bits. |
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* - <kbd>integer creation</kbd> - the date the sub-key was created. |
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* This is a UNIX timestamp. |
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* - <kbd>integer expiration</kbd> - the date the sub-key expires. This |
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* is a UNIX timestamp. If the sub-key |
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* does not expire, use 0. |
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* - <kbd>boolean canSign</kbd> - whether or not the sub-key can be |
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* used to sign data. |
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* - <kbd>boolean canEncrypt</kbd> - whether or not the sub-key can be |
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* used to encrypt data. |
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* - <kbd>boolean hasPrivate</kbd> - whether or not the private key for |
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* the sub-key exists in the keyring. |
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* - <kbd>boolean isRevoked</kbd> - whether or not this sub-key is |
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* revoked. |
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* |
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* @param Crypt_GPG_SubKey|string|array $key optional. Either an existing |
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* sub-key object, which is copied; a sub-key string, which is |
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* parsed; or an array of initial values. |
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*/ |
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public function __construct($key = null) |
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{ |
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// parse from string |
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if (is_string($key)) { |
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$key = self::parse($key); |
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} |
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// copy from object |
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if ($key instanceof Crypt_GPG_SubKey) { |
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$this->_id = $key->_id; |
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$this->_algorithm = $key->_algorithm; |
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$this->_fingerprint = $key->_fingerprint; |
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$this->_length = $key->_length; |
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$this->_creationDate = $key->_creationDate; |
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$this->_expirationDate = $key->_expirationDate; |
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$this->_canSign = $key->_canSign; |
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$this->_canEncrypt = $key->_canEncrypt; |
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$this->_hasPrivate = $key->_hasPrivate; |
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$this->_isRevoked = $key->_isRevoked; |
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} |
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// initialize from array |
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if (is_array($key)) { |
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if (array_key_exists('id', $key)) { |
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$this->setId($key['id']); |
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} |
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if (array_key_exists('algorithm', $key)) { |
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$this->setAlgorithm($key['algorithm']); |
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} |
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if (array_key_exists('fingerprint', $key)) { |
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$this->setFingerprint($key['fingerprint']); |
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} |
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if (array_key_exists('length', $key)) { |
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$this->setLength($key['length']); |
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} |
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if (array_key_exists('creation', $key)) { |
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$this->setCreationDate($key['creation']); |
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} |
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if (array_key_exists('expiration', $key)) { |
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$this->setExpirationDate($key['expiration']); |
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} |
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if (array_key_exists('canSign', $key)) { |
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$this->setCanSign($key['canSign']); |
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} |
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if (array_key_exists('canEncrypt', $key)) { |
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$this->setCanEncrypt($key['canEncrypt']); |
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} |
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if (array_key_exists('hasPrivate', $key)) { |
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$this->setHasPrivate($key['hasPrivate']); |
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} |
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if (array_key_exists('isRevoked', $key)) { |
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$this->setRevoked($key['isRevoked']); |
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} |
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} |
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} |
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// }}} |
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// {{{ getId() |
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/** |
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* Gets the id of this sub-key |
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* |
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* @return string the id of this sub-key. |
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*/ |
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public function getId() |
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{ |
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return $this->_id; |
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} |
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// }}} |
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// {{{ getAlgorithm() |
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/** |
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* Gets the algorithm used by this sub-key |
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* |
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* The algorithm should be one of the Crypt_GPG_SubKey::ALGORITHM_* |
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* constants. |
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* |
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* @return integer the algorithm used by this sub-key. |
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*/ |
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public function getAlgorithm() |
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{ |
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return $this->_algorithm; |
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} |
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// }}} |
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// {{{ getCreationDate() |
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/** |
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* Gets the creation date of this sub-key |
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* |
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* This is a Unix timestamp. |
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* |
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* @return integer the creation date of this sub-key. |
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*/ |
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public function getCreationDate() |
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{ |
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return $this->_creationDate; |
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} |
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// }}} |
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// {{{ getExpirationDate() |
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/** |
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* Gets the date this sub-key expires |
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* |
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* This is a Unix timestamp. If this sub-key does not expire, this will be |
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* zero. |
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* |
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* @return integer the date this sub-key expires. |
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*/ |
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public function getExpirationDate() |
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{ |
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return $this->_expirationDate; |
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} |
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// }}} |
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// {{{ getFingerprint() |
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/** |
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* Gets the fingerprint of this sub-key |
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* |
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* @return string the fingerprint of this sub-key. |
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*/ |
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public function getFingerprint() |
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{ |
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return $this->_fingerprint; |
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} |
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// }}} |
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// {{{ getLength() |
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/** |
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* Gets the length of this sub-key in bits |
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* |
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* @return integer the length of this sub-key in bits. |
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*/ |
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public function getLength() |
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{ |
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return $this->_length; |
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} |
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// }}} |
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// {{{ canSign() |
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/** |
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* Gets whether or not this sub-key can sign data |
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* |
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* @return boolean true if this sub-key can sign data and false if this |
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* sub-key can not sign data. |
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*/ |
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public function canSign() |
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{ |
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return $this->_canSign; |
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} |
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// }}} |
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// {{{ canEncrypt() |
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/** |
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* Gets whether or not this sub-key can encrypt data |
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* |
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* @return boolean true if this sub-key can encrypt data and false if this |
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* sub-key can not encrypt data. |
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*/ |
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public function canEncrypt() |
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{ |
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return $this->_canEncrypt; |
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} |
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// }}} |
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// {{{ hasPrivate() |
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/** |
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* Gets whether or not the private key for this sub-key exists in the |
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* keyring |
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* |
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* @return boolean true the private key for this sub-key exists in the |
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* keyring and false if it does not. |
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*/ |
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public function hasPrivate() |
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{ |
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return $this->_hasPrivate; |
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} |
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// }}} |
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// {{{ isRevoked() |
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/** |
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* Gets whether or not this sub-key is revoked |
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* |
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* @return boolean true if this sub-key is revoked and false if it is not. |
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*/ |
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public function isRevoked() |
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{ |
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return $this->_isRevoked; |
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} |
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// }}} |
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// {{{ setCreationDate() |
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/** |
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* Sets the creation date of this sub-key |
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* |
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* The creation date is a Unix timestamp. |
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* |
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* @param integer $creationDate the creation date of this sub-key. |
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* |
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* @return Crypt_GPG_SubKey the current object, for fluent interface. |
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*/ |
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public function setCreationDate($creationDate) |
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{ |
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$this->_creationDate = intval($creationDate); |
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return $this; |
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} |
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// }}} |
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// {{{ setExpirationDate() |
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/** |
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* Sets the expiration date of this sub-key |
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* |
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* The expiration date is a Unix timestamp. Specify zero if this sub-key |
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* does not expire. |
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* |
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* @param integer $expirationDate the expiration date of this sub-key. |
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* |
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* @return Crypt_GPG_SubKey the current object, for fluent interface. |
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*/ |
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public function setExpirationDate($expirationDate) |
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{ |
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$this->_expirationDate = intval($expirationDate); |
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return $this; |
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} |
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// }}} |
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// {{{ setId() |
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/** |
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* Sets the id of this sub-key |
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* |
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* @param string $id the id of this sub-key. |
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* |
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* @return Crypt_GPG_SubKey the current object, for fluent interface. |
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*/ |
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public function setId($id) |
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{ |
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$this->_id = strval($id); |
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return $this; |
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} |
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// }}} |
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// {{{ setAlgorithm() |
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/** |
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* Sets the algorithm used by this sub-key |
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* |
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* @param integer $algorithm the algorithm used by this sub-key. |
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* |
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* @return Crypt_GPG_SubKey the current object, for fluent interface. |
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*/ |
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public function setAlgorithm($algorithm) |
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{ |
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$this->_algorithm = intval($algorithm); |
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return $this; |
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} |
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// }}} |
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// {{{ setFingerprint() |
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/** |
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* Sets the fingerprint of this sub-key |
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* |
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* @param string $fingerprint the fingerprint of this sub-key. |
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* |
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* @return Crypt_GPG_SubKey the current object, for fluent interface. |
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*/ |
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public function setFingerprint($fingerprint) |
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{ |
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$this->_fingerprint = strval($fingerprint); |
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return $this; |
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} |
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// }}} |
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// {{{ setLength() |
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/** |
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* Sets the length of this sub-key in bits |
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* |
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* @param integer $length the length of this sub-key in bits. |
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* |
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* @return Crypt_GPG_SubKey the current object, for fluent interface. |
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*/ |
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public function setLength($length) |
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{ |
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$this->_length = intval($length); |
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return $this; |
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} |
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// }}} |
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// {{{ setCanSign() |
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/** |
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* Sets whether of not this sub-key can sign data |
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* |
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* @param boolean $canSign true if this sub-key can sign data and false if |
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* it can not. |
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* |
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* @return Crypt_GPG_SubKey the current object, for fluent interface. |
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*/ |
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public function setCanSign($canSign) |
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{ |
|
514 |
$this->_canSign = ($canSign) ? true : false; |
|
515 |
return $this; |
|
516 |
} |
|
517 |
|
|
518 |
// }}} |
|
519 |
// {{{ setCanEncrypt() |
|
520 |
|
|
521 |
/** |
|
522 |
* Sets whether of not this sub-key can encrypt data |
|
523 |
* |
|
524 |
* @param boolean $canEncrypt true if this sub-key can encrypt data and |
|
525 |
* false if it can not. |
|
526 |
* |
|
527 |
* @return Crypt_GPG_SubKey the current object, for fluent interface. |
|
528 |
*/ |
|
529 |
public function setCanEncrypt($canEncrypt) |
|
530 |
{ |
|
531 |
$this->_canEncrypt = ($canEncrypt) ? true : false; |
|
532 |
return $this; |
|
533 |
} |
|
534 |
|
|
535 |
// }}} |
|
536 |
// {{{ setHasPrivate() |
|
537 |
|
|
538 |
/** |
|
539 |
* Sets whether of not the private key for this sub-key exists in the |
|
540 |
* keyring |
|
541 |
* |
|
542 |
* @param boolean $hasPrivate true if the private key for this sub-key |
|
543 |
* exists in the keyring and false if it does |
|
544 |
* not. |
|
545 |
* |
|
546 |
* @return Crypt_GPG_SubKey the current object, for fluent interface. |
|
547 |
*/ |
|
548 |
public function setHasPrivate($hasPrivate) |
|
549 |
{ |
|
550 |
$this->_hasPrivate = ($hasPrivate) ? true : false; |
|
551 |
return $this; |
|
552 |
} |
|
553 |
|
|
554 |
// }}} |
|
555 |
// {{{ setRevoked() |
|
556 |
|
|
557 |
/** |
|
558 |
* Sets whether or not this sub-key is revoked |
|
559 |
* |
|
560 |
* @param boolean $isRevoked whether or not this sub-key is revoked. |
|
561 |
* |
|
562 |
* @return Crypt_GPG_SubKey the current object, for fluent interface. |
|
563 |
*/ |
|
564 |
public function setRevoked($isRevoked) |
|
565 |
{ |
|
566 |
$this->_isRevoked = ($isRevoked) ? true : false; |
|
567 |
return $this; |
|
568 |
} |
|
569 |
|
|
570 |
// }}} |
|
571 |
// {{{ parse() |
|
572 |
|
|
573 |
/** |
|
574 |
* Parses a sub-key object from a sub-key string |
|
575 |
* |
|
576 |
* See <b>doc/DETAILS</b> in the |
|
577 |
* {@link http://www.gnupg.org/download/ GPG distribution} for information |
|
578 |
* on how the sub-key string is parsed. |
|
579 |
* |
|
580 |
* @param string $string the string containing the sub-key. |
|
581 |
* |
|
582 |
* @return Crypt_GPG_SubKey the sub-key object parsed from the string. |
|
583 |
*/ |
|
584 |
public static function parse($string) |
|
585 |
{ |
|
586 |
$tokens = explode(':', $string); |
|
587 |
|
|
588 |
$subKey = new Crypt_GPG_SubKey(); |
|
589 |
|
|
590 |
$subKey->setId($tokens[4]); |
|
591 |
$subKey->setLength($tokens[2]); |
|
592 |
$subKey->setAlgorithm($tokens[3]); |
|
593 |
$subKey->setCreationDate(self::_parseDate($tokens[5])); |
|
594 |
$subKey->setExpirationDate(self::_parseDate($tokens[6])); |
|
595 |
|
|
596 |
if ($tokens[1] == 'r') { |
|
597 |
$subKey->setRevoked(true); |
|
598 |
} |
|
599 |
|
|
600 |
if (strpos($tokens[11], 's') !== false) { |
|
601 |
$subKey->setCanSign(true); |
|
602 |
} |
|
603 |
|
|
604 |
if (strpos($tokens[11], 'e') !== false) { |
|
605 |
$subKey->setCanEncrypt(true); |
|
606 |
} |
|
607 |
|
|
608 |
return $subKey; |
|
609 |
} |
|
610 |
|
|
611 |
// }}} |
|
612 |
// {{{ _parseDate() |
|
613 |
|
|
614 |
/** |
|
615 |
* Parses a date string as provided by GPG into a UNIX timestamp |
|
616 |
* |
|
617 |
* @param string $string the date string. |
|
618 |
* |
|
619 |
* @return integer the UNIX timestamp corresponding to the provided date |
|
620 |
* string. |
|
621 |
*/ |
|
622 |
private static function _parseDate($string) |
|
623 |
{ |
|
624 |
if ($string == '') { |
|
625 |
$timestamp = 0; |
|
626 |
} else { |
|
627 |
// all times are in UTC according to GPG documentation |
|
628 |
$timeZone = new DateTimeZone('UTC'); |
|
629 |
|
|
630 |
if (strpos($string, 'T') === false) { |
|
631 |
// interpret as UNIX timestamp |
|
632 |
$string = '@' . $string; |
|
633 |
} |
|
634 |
|
|
635 |
$date = new DateTime($string, $timeZone); |
|
636 |
|
|
637 |
// convert to UNIX timestamp |
|
638 |
$timestamp = intval($date->format('U')); |
|
639 |
} |
|
640 |
|
|
641 |
return $timestamp; |
|
642 |
} |
|
643 |
|
|
644 |
// }}} |
|
645 |
} |
|
646 |
|
|
647 |
// }}} |
|
648 |
|
|
649 |
?> |