diff options
Diffstat (limited to 'library/vendor/Zend/Filter/Encrypt/Mcrypt.php')
| -rw-r--r-- | library/vendor/Zend/Filter/Encrypt/Mcrypt.php | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/library/vendor/Zend/Filter/Encrypt/Mcrypt.php b/library/vendor/Zend/Filter/Encrypt/Mcrypt.php new file mode 100644 index 0000000..ee7a45b --- /dev/null +++ b/library/vendor/Zend/Filter/Encrypt/Mcrypt.php @@ -0,0 +1,352 @@ +<?php +/** + * Zend Framework + * + * LICENSE + * + * This source file is subject to the new BSD license that is bundled + * with this package in the file LICENSE.txt. + * It is also available through the world-wide-web at this URL: + * http://framework.zend.com/license/new-bsd + * If you did not receive a copy of the license and are unable to + * obtain it through the world-wide-web, please send an email + * to license@zend.com so we can send you a copy immediately. + * + * @category Zend + * @package Zend_Filter + * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com) + * @license http://framework.zend.com/license/new-bsd New BSD License + * @version $Id$ + */ + +/** + * @see Zend_Filter_Encrypt_Interface + */ + +/** @see Zend_Crypt_Math */ + +/** + * Encryption adapter for mcrypt + * + * @category Zend + * @package Zend_Filter + * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com) + * @license http://framework.zend.com/license/new-bsd New BSD License + */ +class Zend_Filter_Encrypt_Mcrypt implements Zend_Filter_Encrypt_Interface +{ + /** + * Definitions for encryption + * array( + * 'key' => encryption key string + * 'algorithm' => algorithm to use + * 'algorithm_directory' => directory where to find the algorithm + * 'mode' => encryption mode to use + * 'modedirectory' => directory where to find the mode + * ) + */ + protected $_encryption = array( + 'key' => 'ZendFramework', + 'algorithm' => 'blowfish', + 'algorithm_directory' => '', + 'mode' => 'cbc', + 'mode_directory' => '', + 'vector' => null, + 'salt' => false + ); + + /** + * Internal compression + * + * @var array + */ + protected $_compression; + + protected static $_srandCalled = false; + + /** + * Class constructor + * + * @param string|array|Zend_Config $options Cryption Options + */ + public function __construct($options) + { + if (!extension_loaded('mcrypt')) { + throw new Zend_Filter_Exception('This filter needs the mcrypt extension'); + } + + if ($options instanceof Zend_Config) { + $options = $options->toArray(); + } elseif (is_string($options)) { + $options = array('key' => $options); + } elseif (!is_array($options)) { + throw new Zend_Filter_Exception('Invalid options argument provided to filter'); + } + + if (array_key_exists('compression', $options)) { + $this->setCompression($options['compression']); + unset($options['compress']); + } + + $this->setEncryption($options); + } + + /** + * Returns the set encryption options + * + * @return array + */ + public function getEncryption() + { + return $this->_encryption; + } + + /** + * Sets new encryption options + * + * @param string|array $options Encryption options + * @return Zend_Filter_File_Encryption + */ + public function setEncryption($options) + { + if (is_string($options)) { + $options = array('key' => $options); + } + + if (!is_array($options)) { + throw new Zend_Filter_Exception('Invalid options argument provided to filter'); + } + + $options = $options + $this->getEncryption(); + $algorithms = mcrypt_list_algorithms($options['algorithm_directory']); + if (!in_array($options['algorithm'], $algorithms)) { + throw new Zend_Filter_Exception("The algorithm '{$options['algorithm']}' is not supported"); + } + + $modes = mcrypt_list_modes($options['mode_directory']); + if (!in_array($options['mode'], $modes)) { + throw new Zend_Filter_Exception("The mode '{$options['mode']}' is not supported"); + } + + if (!mcrypt_module_self_test($options['algorithm'], $options['algorithm_directory'])) { + throw new Zend_Filter_Exception('The given algorithm can not be used due an internal mcrypt problem'); + } + + if (!isset($options['vector'])) { + $options['vector'] = null; + } + + $this->_encryption = $options; + $this->setVector($options['vector']); + + return $this; + } + + /** + * Returns the set vector + * + * @return string + */ + public function getVector() + { + return $this->_encryption['vector']; + } + + /** + * Sets the initialization vector + * + * @param string $vector (Optional) Vector to set + * @return Zend_Filter_Encrypt_Mcrypt + */ + public function setVector($vector = null) + { + $cipher = $this->_openCipher(); + $size = mcrypt_enc_get_iv_size($cipher); + if (empty($vector)) { + $this->_srand(); + if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' && version_compare(PHP_VERSION, '5.3.0', '<')) { + $method = MCRYPT_RAND; + } else { + if (file_exists('/dev/urandom') || (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN')) { + $method = MCRYPT_DEV_URANDOM; + } elseif (file_exists('/dev/random')) { + $method = MCRYPT_DEV_RANDOM; + } else { + $method = MCRYPT_RAND; + } + } + $vector = mcrypt_create_iv($size, $method); + } else if (strlen($vector) != $size) { + throw new Zend_Filter_Exception('The given vector has a wrong size for the set algorithm'); + } + + $this->_encryption['vector'] = $vector; + $this->_closeCipher($cipher); + + return $this; + } + + /** + * Returns the compression + * + * @return array + */ + public function getCompression() + { + return $this->_compression; + } + + /** + * Sets a internal compression for values to encrypt + * + * @param string|array $compression + * @return Zend_Filter_Encrypt_Mcrypt + */ + public function setCompression($compression) + { + if (is_string($this->_compression)) { + $compression = array('adapter' => $compression); + } + + $this->_compression = $compression; + return $this; + } + + /** + * Defined by Zend_Filter_Interface + * + * Encrypts $value with the defined settings + * + * @param string $value The content to encrypt + * @return string The encrypted content + */ + public function encrypt($value) + { + // compress prior to encryption + if (!empty($this->_compression)) { + $compress = new Zend_Filter_Compress($this->_compression); + $value = $compress->filter($value); + } + + $cipher = $this->_openCipher(); + $this->_initCipher($cipher); + $encrypted = mcrypt_generic($cipher, $value); + mcrypt_generic_deinit($cipher); + $this->_closeCipher($cipher); + + return $encrypted; + } + + /** + * Defined by Zend_Filter_Interface + * + * Decrypts $value with the defined settings + * + * @param string $value Content to decrypt + * @return string The decrypted content + */ + public function decrypt($value) + { + $cipher = $this->_openCipher(); + $this->_initCipher($cipher); + $decrypted = mdecrypt_generic($cipher, $value); + mcrypt_generic_deinit($cipher); + $this->_closeCipher($cipher); + + // decompress after decryption + if (!empty($this->_compression)) { + $decompress = new Zend_Filter_Decompress($this->_compression); + $decrypted = $decompress->filter($decrypted); + } + + return $decrypted; + } + + /** + * Returns the adapter name + * + * @return string + */ + public function toString() + { + return 'Mcrypt'; + } + + /** + * Open a cipher + * + * @throws Zend_Filter_Exception When the cipher can not be opened + * @return resource Returns the opened cipher + */ + protected function _openCipher() + { + $cipher = mcrypt_module_open( + $this->_encryption['algorithm'], + $this->_encryption['algorithm_directory'], + $this->_encryption['mode'], + $this->_encryption['mode_directory']); + + if ($cipher === false) { + throw new Zend_Filter_Exception('Mcrypt can not be opened with your settings'); + } + + return $cipher; + } + + /** + * Close a cipher + * + * @param resource $cipher Cipher to close + * @return Zend_Filter_Encrypt_Mcrypt + */ + protected function _closeCipher($cipher) + { + mcrypt_module_close($cipher); + + return $this; + } + + /** + * Initialises the cipher with the set key + * + * @param resource $cipher + * @throws + * @return resource + */ + protected function _initCipher($cipher) + { + $key = $this->_encryption['key']; + + $keysizes = mcrypt_enc_get_supported_key_sizes($cipher); + if (empty($keysizes) || ($this->_encryption['salt'] == true)) { + $this->_srand(); + $keysize = mcrypt_enc_get_key_size($cipher); + $key = substr(md5($key), 0, $keysize); + } else if (!in_array(strlen($key), $keysizes)) { + throw new Zend_Filter_Exception('The given key has a wrong size for the set algorithm'); + } + + $result = mcrypt_generic_init($cipher, $key, $this->_encryption['vector']); + if ($result < 0) { + throw new Zend_Filter_Exception('Mcrypt could not be initialize with the given setting'); + } + + return $this; + } + + /** + * _srand() interception + * + * @see ZF-8742 + */ + protected function _srand() + { + if (version_compare(PHP_VERSION, '5.3.0', '>=')) { + return; + } + if (!self::$_srandCalled) { + srand(Zend_Crypt_Math::randInteger(0, PHP_INT_MAX)); + self::$_srandCalled = true; + } + } +} |