/js/lib/Socket.IO-node/support/socket.io-client/lib/vendor/web-socket-js/flash-src/com/hurlant/crypto/symmetric/CBCMode.as
ActionScript | 55 lines | 40 code | 4 blank | 11 comment | 4 complexity | 46d80b9fea6333667bcad804908a6c29 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.1, MPL-2.0-no-copyleft-exception, BSD-3-Clause
- /**
- * CBCMode
- *
- * An ActionScript 3 implementation of the CBC confidentiality mode
- * Copyright (c) 2007 Henri Torgemane
- *
- * See LICENSE.txt for full license information.
- */
- package com.hurlant.crypto.symmetric
- {
- import flash.utils.ByteArray;
-
- /**
- * CBC confidentiality mode. why not.
- */
- public class CBCMode extends IVMode implements IMode
- {
-
- public function CBCMode(key:ISymmetricKey, padding:IPad = null) {
- super(key, padding);
- }
-
- public function encrypt(src:ByteArray):void {
- padding.pad(src);
- var vector:ByteArray = getIV4e();
- for (var i:uint=0;i<src.length;i+=blockSize) {
- for (var j:uint=0;j<blockSize;j++) {
- src[i+j] ^= vector[j];
- }
- key.encrypt(src, i);
- vector.position=0;
- vector.writeBytes(src, i, blockSize);
- }
- }
- public function decrypt(src:ByteArray):void {
- var vector:ByteArray = getIV4d();
- var tmp:ByteArray = new ByteArray;
- for (var i:uint=0;i<src.length;i+=blockSize) {
- tmp.position=0;
- tmp.writeBytes(src, i, blockSize);
- key.decrypt(src, i);
- for (var j:uint=0;j<blockSize;j++) {
- src[i+j] ^= vector[j];
- }
- vector.position=0;
- vector.writeBytes(tmp, 0, blockSize);
- }
- padding.unpad(src);
- }
-
- public function toString():String {
- return key.toString()+"-cbc";
- }
- }
- }