diff options
Diffstat (limited to 'comm/third_party/botan/src/lib/block/gost_28147/gost_28147.h')
-rw-r--r-- | comm/third_party/botan/src/lib/block/gost_28147/gost_28147.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/block/gost_28147/gost_28147.h b/comm/third_party/botan/src/lib/block/gost_28147/gost_28147.h new file mode 100644 index 0000000000..f71bb28bd9 --- /dev/null +++ b/comm/third_party/botan/src/lib/block/gost_28147/gost_28147.h @@ -0,0 +1,95 @@ +/* +* GOST 28147-89 +* (C) 1999-2009 Jack Lloyd +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#ifndef BOTAN_GOST_28147_89_H_ +#define BOTAN_GOST_28147_89_H_ + +#include <botan/block_cipher.h> + +BOTAN_FUTURE_INTERNAL_HEADER(gost_28147.h) + +namespace Botan { + +/** +* 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 BOTAN_PUBLIC_API(2,0) GOST_28147_89_Params final + { + public: + /** + * @param row the row + * @param col the column + * @return sbox entry at this row/column + */ + uint8_t sbox_entry(size_t row, size_t col) const; + + /** + * @return name of this parameter set + */ + std::string param_name() const { return m_name; } + + /** + * Return a representation used for building larger tables + * For internal use + */ + uint8_t sbox_pair(size_t row, size_t 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 + * @param name of the parameter set + */ + explicit GOST_28147_89_Params(const std::string& name = "R3411_94_TestParam"); + private: + const uint8_t* m_sboxes; + std::string m_name; + }; + +/** +* GOST 28147-89 +*/ +class BOTAN_PUBLIC_API(2,0) GOST_28147_89 final : public Block_Cipher_Fixed_Params<8, 32> + { + public: + void encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override; + void decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override; + + void clear() override; + + std::string name() const override; + BlockCipher* clone() const override { return new GOST_28147_89(m_SBOX); } + + /** + * @param params the sbox parameters to use + */ + explicit GOST_28147_89(const GOST_28147_89_Params& params); + + explicit GOST_28147_89(const std::string& param_name) : + GOST_28147_89(GOST_28147_89_Params(param_name)) {} + private: + explicit GOST_28147_89(const std::vector<uint32_t>& other_SBOX) : + m_SBOX(other_SBOX), m_EK(8) {} + + void key_schedule(const uint8_t[], size_t) override; + + /* + * The sbox is not secret, this is just a larger expansion of it + * which we generate at runtime for faster execution + */ + std::vector<uint32_t> m_SBOX; + + secure_vector<uint32_t> m_EK; + }; + +} + +#endif |