diff options
Diffstat (limited to 'src/block/gost_28147/gost_28147.h')
| -rw-r--r-- | src/block/gost_28147/gost_28147.h | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/src/block/gost_28147/gost_28147.h b/src/block/gost_28147/gost_28147.h index 1ff04b890..98eaba870 100644 --- a/src/block/gost_28147/gost_28147.h +++ b/src/block/gost_28147/gost_28147.h @@ -12,6 +12,32 @@ 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; + + /** + * 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: + static const byte GOST_R_3411_TEST_PARAMS[64]; + static const byte GOST_R_3411_CRYPTOPRO_PARAMS[64]; + + const byte* sboxes; + }; + /** * GOST 28147-89 */ @@ -21,10 +47,13 @@ class BOTAN_DLL GOST_28147_89 : public BlockCipher void clear() throw() { EK.clear(); } std::string name() const { return "GOST-28147-89"; } - BlockCipher* clone() const { return new GOST_28147_89; } + BlockCipher* clone() const { return new GOST_28147_89(SBOX); } - GOST_28147_89(); + 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); |