/**

 * ISymmetricKey

 * 

 * An interface for symmetric encryption keys to implement.

 * Copyright (c) 2007 Henri Torgemane

 * 

 * See LICENSE.txt for full license information.

 */

package com.hurlant.crypto.symmetric

{

	import flash.utils.ByteArray;

	

	public interface ISymmetricKey

	{

		/**

		 * Returns the block size used by this particular encryption algorithm

		 */

		function getBlockSize():uint;

		/**

		 * Encrypt one block of data in "block", starting at "index", of length "getBlockSize()"

		 */

		function encrypt(block:ByteArray, index:uint=0):void;

		/**

		 * Decrypt one block of data in "block", starting at "index", of length "getBlockSize()"

		 */

		function decrypt(block:ByteArray, index:uint=0):void;

		/**

		 * Attempts to destroy sensitive information from memory, such as encryption keys.

		 * Note: This is not guaranteed to work given the Flash sandbox model.

		 */

		function dispose():void;

		

		function toString():String;

	}

}