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- <?php namespace Laravel;
- if (trim(Config::$items['application']['key']) === '')
- {
- throw new \LogicException('The encryption class may not be used without an application key.');
- }
- class Crypter {
- /**
- * The encryption cipher.
- *
- * @var string
- */
- protected static $cipher = MCRYPT_RIJNDAEL_256;
- /**
- * The encryption mode.
- *
- * @var string
- */
- protected static $mode = MCRYPT_MODE_CBC;
- /**
- * Encrypt a string using Mcrypt.
- *
- * The given string will be encrypted using AES-256 encryption for a high
- * degree of security. The returned string will also be base64 encoded.
- *
- * Mcrypt must be installed on your machine before using this method, and
- * an application key must be specified in the application configuration.
- *
- * <code>
- * // Encrypt a string using the Mcrypt PHP extension
- * $encrypted = Crypter::encrpt('secret');
- * </code>
- *
- * @param string $value
- * @return string
- */
- public static function encrypt($value)
- {
- $iv = mcrypt_create_iv(static::iv_size(), MCRYPT_RAND);
- $value = mcrypt_encrypt(static::$cipher, static::key(), $value, static::$mode, $iv);
- return base64_encode($iv.$value);
- }
- /**
- * Decrypt a string using Mcrypt.
- *
- * The given encrypted value must have been encrypted using Laravel and
- * the application key specified in the application configuration file.
- *
- * Mcrypt must be installed on your machine before using this method.
- *
- * @param string $value
- * @return string
- */
- public static function decrypt($value)
- {
- if (($value = base64_decode($value)) === false)
- {
- throw new \InvalidArgumentException('Input value is not valid base64 data.');
- }
- $iv = substr($value, 0, static::iv_size());
- $value = substr($value, static::iv_size());
- return rtrim(mcrypt_decrypt(static::$cipher, static::key(), $value, static::$mode, $iv), "\0");
- }
- /**
- * Get the input vector size for the cipher and mode.
- *
- * @return int
- */
- protected static function iv_size()
- {
- return mcrypt_get_iv_size(static::$cipher, static::$mode);
- }
- /**
- * Get the encryption key from the application configuration.
- *
- * @return string
- */
- protected static function key()
- {
- return Config::$items['application']['key'];
- }
- }
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