--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dcrypt/crypto/Cipher.d	Sun Aug 10 14:20:17 2008 -0400
@@ -0,0 +1,38 @@
+/**
+ * This file is part of the dcrypt project.
+ *
+ * Copyright: Copyright (C) dcrypt contributors 2008. All rights reserved.
+ * License:   MIT
+ * Authors:   Thomas Dixon
+ */
+
+module dcrypt.crypto.Cipher;
+
+public import dcrypt.crypto.errors.InvalidKeyError;
+public import dcrypt.crypto.errors.ShortBufferError;
+public import dcrypt.crypto.errors.NotInitializedError;
+public import dcrypt.crypto.errors.InvalidParameterError;
+
+public import dcrypt.crypto.params.CipherParameters;
+
+/** Base cipher class */
+interface Cipher {
+    static const bool ENCRYPT = true,
+                      DECRYPT = false;
+    
+    /**
+     * Initialize a cipher.
+     * 
+     * Params:
+     *     encrypt = True if we are encrypting.
+     *     params  = Parameters to be passed to the cipher. (Key, rounds, etc.)
+     */
+    abstract void init(bool encrypt, CipherParameters params);
+    
+    /** Returns: The name of the algorithm of this cipher. */
+    abstract char[] name();
+    
+    /** Reset cipher to its state immediately subsequent the last init. */
+    abstract void reset();
+    
+}