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source/com/hurlant/crypto/symmetric/ISymmetricKey.as

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+/**
+ * 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;
+	}
+}