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Diffstat (limited to 'botan/build/botan/gost_28147.h')
-rw-r--r-- | botan/build/botan/gost_28147.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/botan/build/botan/gost_28147.h b/botan/build/botan/gost_28147.h new file mode 100644 index 0000000..96d24c6 --- /dev/null +++ b/botan/build/botan/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 |