--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/src/main/java/ch/ethz/ssh2/crypto/cipher/BlockCipher.java	Thu Dec 03 11:23:55 2015 -0800
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2006-2011 Christian Plattner. All rights reserved.
+ * Please refer to the LICENSE.txt for licensing details.
+ */
+package ch.ethz.ssh2.crypto.cipher;
+
+/**
+ * BlockCipher.
+ *
+ * @author Christian Plattner
+ * @version 2.50, 03/15/10
+ */
+public interface BlockCipher {
+    public void init(boolean forEncryption, byte[] key);
+
+    public int getBlockSize();
+
+    public void transformBlock(byte[] src, int srcoff, byte[] dst, int dstoff);
+}