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Diffstat (limited to 'src/block/gost_28147/gost_28147.cpp')
| -rw-r--r-- | src/block/gost_28147/gost_28147.cpp | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/src/block/gost_28147/gost_28147.cpp b/src/block/gost_28147/gost_28147.cpp deleted file mode 100644 index 09ca9a57e..000000000 --- a/src/block/gost_28147/gost_28147.cpp +++ /dev/null @@ -1,177 +0,0 @@ -/* -* GOST 28147-89 -* (C) 1999-2009,2011 Jack Lloyd -* -* Distributed under the terms of the Botan license -*/ - -#include <botan/gost_28147.h> -#include <botan/loadstor.h> -#include <botan/rotate.h> - -namespace Botan { - -byte GOST_28147_89_Params::sbox_entry(size_t row, size_t col) const - { - byte x = sboxes[4 * col + (row / 2)]; - - return (row % 2 == 0) ? (x >> 4) : (x & 0x0F); - } - -GOST_28147_89_Params::GOST_28147_89_Params(const std::string& n) : name(n) - { - // Encoded in the packed fromat from RFC 4357 - - // GostR3411_94_TestParamSet (OID 1.2.643.2.2.31.0) - static const byte GOST_R_3411_TEST_PARAMS[64] = { - 0x4E, 0x57, 0x64, 0xD1, 0xAB, 0x8D, 0xCB, 0xBF, 0x94, 0x1A, 0x7A, - 0x4D, 0x2C, 0xD1, 0x10, 0x10, 0xD6, 0xA0, 0x57, 0x35, 0x8D, 0x38, - 0xF2, 0xF7, 0x0F, 0x49, 0xD1, 0x5A, 0xEA, 0x2F, 0x8D, 0x94, 0x62, - 0xEE, 0x43, 0x09, 0xB3, 0xF4, 0xA6, 0xA2, 0x18, 0xC6, 0x98, 0xE3, - 0xC1, 0x7C, 0xE5, 0x7E, 0x70, 0x6B, 0x09, 0x66, 0xF7, 0x02, 0x3C, - 0x8B, 0x55, 0x95, 0xBF, 0x28, 0x39, 0xB3, 0x2E, 0xCC }; - - // GostR3411-94-CryptoProParamSet (OID 1.2.643.2.2.31.1) - static const byte GOST_R_3411_CRYPTOPRO_PARAMS[64] = { - 0xA5, 0x74, 0x77, 0xD1, 0x4F, 0xFA, 0x66, 0xE3, 0x54, 0xC7, 0x42, - 0x4A, 0x60, 0xEC, 0xB4, 0x19, 0x82, 0x90, 0x9D, 0x75, 0x1D, 0x4F, - 0xC9, 0x0B, 0x3B, 0x12, 0x2F, 0x54, 0x79, 0x08, 0xA0, 0xAF, 0xD1, - 0x3E, 0x1A, 0x38, 0xC7, 0xB1, 0x81, 0xC6, 0xE6, 0x56, 0x05, 0x87, - 0x03, 0x25, 0xEB, 0xFE, 0x9C, 0x6D, 0xF8, 0x6D, 0x2E, 0xAB, 0xDE, - 0x20, 0xBA, 0x89, 0x3C, 0x92, 0xF8, 0xD3, 0x53, 0xBC }; - - if(name == "R3411_94_TestParam") - sboxes = GOST_R_3411_TEST_PARAMS; - else if(name == "R3411_CryptoPro") - sboxes = GOST_R_3411_CRYPTOPRO_PARAMS; - else - throw Invalid_Argument("GOST_28147_89_Params: Unknown " + name); - } - -/* -* GOST Constructor -*/ -GOST_28147_89::GOST_28147_89(const GOST_28147_89_Params& param) : SBOX(1024) - { - // Convert the parallel 4x4 sboxes into larger word-based sboxes - for(size_t i = 0; i != 4; ++i) - for(size_t j = 0; j != 256; ++j) - { - const u32bit T = (param.sbox_entry(2*i , j % 16)) | - (param.sbox_entry(2*i+1, j / 16) << 4); - SBOX[256*i+j] = rotate_left(T, (11+8*i) % 32); - } - } - -std::string GOST_28147_89::name() const - { - /* - 'Guess' the right name for the sbox on the basis of the values. - This would need to be updated if support for other sbox parameters - is added. Preferably, we would just store the string value in the - constructor, but can't break binary compat. - */ - std::string sbox_name = ""; - if(SBOX[0] == 0x00072000) - sbox_name = "R3411_94_TestParam"; - else if(SBOX[0] == 0x0002D000) - sbox_name = "R3411_CryptoPro"; - else - throw Internal_Error("GOST-28147 unrecognized sbox value"); - - return "GOST-28147-89(" + sbox_name + ")"; - } - -/* -* Two rounds of GOST -*/ -#define GOST_2ROUND(N1, N2, R1, R2) \ - do { \ - u32bit T0 = N1 + EK[R1]; \ - N2 ^= SBOX[get_byte(3, T0)] | \ - SBOX[get_byte(2, T0)+256] | \ - SBOX[get_byte(1, T0)+512] | \ - SBOX[get_byte(0, T0)+768]; \ - \ - u32bit T1 = N2 + EK[R2]; \ - N1 ^= SBOX[get_byte(3, T1)] | \ - SBOX[get_byte(2, T1)+256] | \ - SBOX[get_byte(1, T1)+512] | \ - SBOX[get_byte(0, T1)+768]; \ - } while(0) - -/* -* GOST Encryption -*/ -void GOST_28147_89::encrypt_n(const byte in[], byte out[], size_t blocks) const - { - for(size_t i = 0; i != blocks; ++i) - { - u32bit N1 = load_le<u32bit>(in, 0); - u32bit N2 = load_le<u32bit>(in, 1); - - for(size_t j = 0; j != 3; ++j) - { - GOST_2ROUND(N1, N2, 0, 1); - GOST_2ROUND(N1, N2, 2, 3); - GOST_2ROUND(N1, N2, 4, 5); - GOST_2ROUND(N1, N2, 6, 7); - } - - GOST_2ROUND(N1, N2, 7, 6); - GOST_2ROUND(N1, N2, 5, 4); - GOST_2ROUND(N1, N2, 3, 2); - GOST_2ROUND(N1, N2, 1, 0); - - store_le(out, N2, N1); - - in += BLOCK_SIZE; - out += BLOCK_SIZE; - } - } - -/* -* GOST Decryption -*/ -void GOST_28147_89::decrypt_n(const byte in[], byte out[], size_t blocks) const - { - for(size_t i = 0; i != blocks; ++i) - { - u32bit N1 = load_le<u32bit>(in, 0); - u32bit N2 = load_le<u32bit>(in, 1); - - GOST_2ROUND(N1, N2, 0, 1); - GOST_2ROUND(N1, N2, 2, 3); - GOST_2ROUND(N1, N2, 4, 5); - GOST_2ROUND(N1, N2, 6, 7); - - for(size_t j = 0; j != 3; ++j) - { - GOST_2ROUND(N1, N2, 7, 6); - GOST_2ROUND(N1, N2, 5, 4); - GOST_2ROUND(N1, N2, 3, 2); - GOST_2ROUND(N1, N2, 1, 0); - } - - store_le(out, N2, N1); - in += BLOCK_SIZE; - out += BLOCK_SIZE; - } - } - -/* -* GOST Key Schedule -*/ -void GOST_28147_89::key_schedule(const byte key[], size_t) - { - EK.resize(8); - for(size_t i = 0; i != 8; ++i) - EK[i] = load_le<u32bit>(key, i); - } - -void GOST_28147_89::clear() - { - zap(EK); - } - -} |