1 files changed, 58 insertions, 0 deletions
diff --git a/lib/block/cascade/cascade.h b/lib/block/cascade/cascade.h
new file mode 100644
index 000000000..9b7d44fdf
--- /dev/null
+++ b/lib/block/cascade/cascade.h
@@ -0,0 +1,58 @@
+/*
+* Block Cipher Cascade
+* (C) 2010 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_CASCADE_H__
+#define BOTAN_CASCADE_H__
+
+#include <botan/block_cipher.h>
+
+namespace Botan {
+
+/**
+* Block Cipher Cascade
+*/
+class BOTAN_DLL Cascade_Cipher : public BlockCipher
+   {
+   public:
+      void encrypt_n(const byte in[], byte out[], size_t blocks) const;
+      void decrypt_n(const byte in[], byte out[], size_t blocks) const;
+
+      size_t block_size() const { return block; }
+
+      Key_Length_Specification key_spec() const
+         {
+         return Key_Length_Specification(cipher1->maximum_keylength() +
+                                         cipher2->maximum_keylength());
+         }
+
+      void clear();
+      std::string name() const;
+      BlockCipher* clone() const;
+
+      /**
+      * Create a cascade of two block ciphers
+      * @param cipher1 the first cipher
+      * @param cipher2 the second cipher
+      */
+      Cascade_Cipher(BlockCipher* cipher1, BlockCipher* cipher2);
+
+      Cascade_Cipher(const Cascade_Cipher&) = delete;
+      Cascade_Cipher& operator=(const Cascade_Cipher&) = delete;
+
+      ~Cascade_Cipher();
+   private:
+      void key_schedule(const byte[], size_t);
+
+      size_t block;
+      BlockCipher* cipher1;
+      BlockCipher* cipher2;
+   };
+
+
+}
+
+#endif