1 files changed, 67 insertions, 0 deletions
diff --git a/botan/src/block/gost_28147/gost_28147.h b/botan/src/block/gost_28147/gost_28147.h
new file mode 100644
index 0000000..96d24c6
--- /dev/null
+++ b/botan/src/block/gost_28147/gost_28147.h
@@ -0,0 +1,67 @@
+/*
+* GOST 28147-89
+* (C) 1999-2009 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_GOST_28147_89_H__
+#define BOTAN_GOST_28147_89_H__
+
+#include <botan/block_cipher.h>
+
+namespace Botan {
+
+class GOST_28147_89_Params;
+
+/**
+* The GOST 28147-89 block cipher uses a set of 4 bit Sboxes, however
+* the standard does not actually define these Sboxes; they are
+* considered a local configuration issue. Several different sets are
+* used.
+*/
+class GOST_28147_89_Params
+   {
+   public:
+      byte sbox_entry(u32bit row, u32bit col) const;
+
+      std::string param_name() const { return name; }
+
+      /**
+      * Default GOST parameters are the ones given in GOST R 34.11 for
+      * testing purposes; these sboxes are also used by Crypto++, and,
+      * at least according to Wikipedia, the Central Bank of Russian Federation
+      */
+      GOST_28147_89_Params(const std::string& name = "R3411_94_TestParam");
+   private:
+      const byte* sboxes;
+      std::string name;
+   };
+
+/**
+* GOST 28147-89
+*/
+class BOTAN_DLL GOST_28147_89 : public BlockCipher
+   {
+   public:
+      void clear() throw() { EK.clear(); }
+
+      std::string name() const { return "GOST-28147-89"; }
+      BlockCipher* clone() const { return new GOST_28147_89(SBOX); }
+
+      GOST_28147_89(const GOST_28147_89_Params& params);
+   private:
+      GOST_28147_89(const SecureBuffer<u32bit, 1024>& other_SBOX) :
+         BlockCipher(8, 32), SBOX(other_SBOX) {}
+
+      void enc(const byte[], byte[]) const;
+      void dec(const byte[], byte[]) const;
+      void key_schedule(const byte[], u32bit);
+
+      SecureBuffer<u32bit, 1024> SBOX;
+      SecureBuffer<u32bit, 8> EK;
+   };
+
+}
+
+#endif