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<?php |
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/** |
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* Encryption utilities. |
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* |
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* Copyright: © 2009-2011 |
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* {@link http://www.websharks-inc.com/ WebSharks, Inc.} |
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* ( coded in the USA ) |
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* |
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* Released under the terms of the GNU General Public License. |
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* You should have received a copy of the GNU General Public License, |
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* along with this software. In the main directory, see: /licensing/ |
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* If not, see: {@link http://www.gnu.org/licenses/}. |
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* |
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* @package s2Member\Utilities |
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* @since 3.5 |
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*/ |
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if (realpath (__FILE__) === realpath ($_SERVER["SCRIPT_FILENAME"])) |
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exit ("Do not access this file directly."); |
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/**/ |
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if (!class_exists ("c_ws_plugin__s2member_utils_encryption")) |
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{ |
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/** |
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* Encryption utilities. |
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* |
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* @package s2Member\Utilities |
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* @since 3.5 |
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*/ |
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class c_ws_plugin__s2member_utils_encryption |
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{ |
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/** |
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* RIJNDAEL 256: two-way encryption/decryption, with a URL-safe base64 wrapper. |
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* |
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* Includes a built-in fallback on XOR encryption when mcrypt is not available. |
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* |
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* @package s2Member\Utilities |
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* @since 3.5 |
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* |
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* @param str $string A string of data to encrypt. |
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* @param str $key Optional. Key used for encryption. |
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* Defaults to the one configured for s2Member. |
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* Short of that, defaults to: ``wp_salt()``. |
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* @return str Encrypted string. |
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*/ |
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public static function encrypt ($string = FALSE, $key = FALSE) |
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{ |
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$string = (is_string ($string)) ? $string : ""; |
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/**/ |
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$key = (!is_string ($key) || !strlen ($key)) ? $GLOBALS["WS_PLUGIN__"]["s2member"]["o"]["sec_encryption_key"] : $key; |
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$key = (!is_string ($key) || !strlen ($key)) ? wp_salt () : $key; |
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/**/ |
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if (function_exists ("mcrypt_encrypt") && in_array ("rijndael-256", mcrypt_list_algorithms ()) && in_array ("cbc", mcrypt_list_modes ())) |
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{ |
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$string = (strlen ($string)) ? "~r2|" . $string : ""; |
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$key = substr ($key, 0, mcrypt_get_key_size (MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC)); |
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$iv = c_ws_plugin__s2member_utils_strings::random_str_gen (mcrypt_get_iv_size (MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC), false); |
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$encrypted = mcrypt_encrypt (MCRYPT_RIJNDAEL_256, $key, $string, MCRYPT_MODE_CBC, $iv); |
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$encrypted = (strlen ($encrypted)) ? "~r2:" . $iv . "|" . $encrypted : ""; |
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/**/ |
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return ($base64 = str_replace (array ("+", "/", "="), array ("-", "_", "~"), base64_encode ($encrypted))); |
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} |
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else /* Fallback on XOR encryption. */ |
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return c_ws_plugin__s2member_utils_encryption::xencrypt ($string, $key); |
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} |
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/** |
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* RIJNDAEL 256: two-way encryption/decryption, with a URL-safe base64 wrapper. |
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* |
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* Includes a built-in fallback on XOR encryption when mcrypt is not available. |
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* |
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* @package s2Member\Utilities |
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* @since 3.5 |
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* |
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* @param str $base64 A string of data to decrypt. Should still be base64 encoded. |
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* @param str $key Optional. Key used originally for encryption. |
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* Defaults to the one configured for s2Member. |
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* Short of that, defaults to: ``wp_salt()``. |
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* @return str Decrypted string. |
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*/ |
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public static function decrypt ($base64 = FALSE, $key = FALSE) |
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{ |
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$base64 = (is_string ($base64)) ? $base64 : ""; |
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/**/ |
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$key = (!is_string ($key) || !strlen ($key)) ? $GLOBALS["WS_PLUGIN__"]["s2member"]["o"]["sec_encryption_key"] : $key; |
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$key = (!is_string ($key) || !strlen ($key)) ? wp_salt () : $key; |
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/**/ |
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$encrypted = base64_decode (str_replace (array ("-", "_", "~", "."), array ("+", "/", "=", "="), $base64)); |
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/**/ |
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if (function_exists ("mcrypt_decrypt") && in_array ("rijndael-256", mcrypt_list_algorithms ()) && in_array ("cbc", mcrypt_list_modes ()) && preg_match ("/^~r2\:(.+?)\|/", $encrypted, $v1)) |
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{ |
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$encrypted = preg_replace ("/^~r2\:(.+?)\|/", "", $encrypted); |
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$key = substr ($key, 0, mcrypt_get_key_size (MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC)); |
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$decrypted = mcrypt_decrypt (MCRYPT_RIJNDAEL_256, $key, $encrypted, MCRYPT_MODE_CBC, $v1[1]); |
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$decrypted = preg_replace ("/^~r2\|/", "", $decrypted, 1, $v2); |
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$decrypted = ($v2) ? $decrypted : ""; /* Check validity. */ |
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$decrypted = rtrim ($decrypted, "\0\4"); /* Nulls/EOTs. */ |
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/**/ |
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return ($string = $decrypted); |
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} |
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else /* Fallback on XOR decryption. */ |
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return c_ws_plugin__s2member_utils_encryption::xdecrypt ($base64, $key); |
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} |
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/** |
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* XOR two-way encryption/decryption, with a base64 wrapper. |
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* |
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* @package s2Member\Utilities |
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* @since 3.5 |
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* |
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* @param str $string A string of data to encrypt. |
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* @param str $key Optional. Key used for encryption. |
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* Defaults to the one configured for s2Member. |
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* Short of that, defaults to: ``wp_salt()``. |
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* @return str Encrypted string. |
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*/ |
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public static function xencrypt ($string = FALSE, $key = FALSE) |
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{ |
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$string = (is_string ($string)) ? $string : ""; |
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/**/ |
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$key = (!is_string ($key) || !strlen ($key)) ? $GLOBALS["WS_PLUGIN__"]["s2member"]["o"]["sec_encryption_key"] : $key; |
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$key = (!is_string ($key) || !strlen ($key)) ? wp_salt () : $key; |
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/**/ |
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$string = (strlen ($string)) ? "~xe|" . $string : ""; |
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/**/ |
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for ($i = 1, $encrypted = ""; $i <= strlen ($string); $i++) |
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{ |
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$char = substr ($string, $i - 1, 1); |
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$keychar = substr ($key, ($i % strlen ($key)) - 1, 1); |
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$encrypted .= chr (ord ($char) + ord ($keychar)); |
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} |
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/**/ |
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$encrypted = (strlen ($encrypted)) ? "~xe|" . $encrypted : ""; |
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/**/ |
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return ($base64 = str_replace (array ("+", "/", "="), array ("-", "_", "~"), base64_encode ($encrypted))); |
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} |
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/** |
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* XOR two-way encryption/decryption, with a base64 wrapper. |
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* |
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* @package s2Member\Utilities |
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* @since 3.5 |
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* |
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* @param str $base64 A string of data to decrypt. Should still be base64 encoded. |
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* @param str $key Optional. Key used originally for encryption. |
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* Defaults to the one configured for s2Member. |
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* Short of that, defaults to: ``wp_salt()``. |
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* @return str Decrypted string. |
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*/ |
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public static function xdecrypt ($base64 = FALSE, $key = FALSE) |
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{ |
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$base64 = (is_string ($base64)) ? $base64 : ""; |
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/**/ |
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$key = (!is_string ($key) || !strlen ($key)) ? $GLOBALS["WS_PLUGIN__"]["s2member"]["o"]["sec_encryption_key"] : $key; |
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$key = (!is_string ($key) || !strlen ($key)) ? wp_salt () : $key; |
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/**/ |
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$encrypted = base64_decode (str_replace (array ("-", "_", "~", "."), array ("+", "/", "=", "="), $base64)); |
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/**/ |
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$encrypted = preg_replace ("/^~xe\|/", "", $encrypted, 1, $v1); |
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$encrypted = ($v1) ? $encrypted : ""; /* Check validity. */ |
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/**/ |
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for ($i = 1, $decrypted = ""; $i <= strlen ($encrypted); $i++) |
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{ |
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$char = substr ($encrypted, $i - 1, 1); |
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$keychar = substr ($key, ($i % strlen ($key)) - 1, 1); |
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$decrypted .= chr (ord ($char) - ord ($keychar)); |
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} |
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/**/ |
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$decrypted = preg_replace ("/^~xe\|/", "", $decrypted, 1, $v2); |
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$decrypted = ($v2) ? $decrypted : ""; /* Check validity. */ |
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/**/ |
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return ($string = $decrypted); |
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} |
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} |
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} |
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?> |
