diff options
Diffstat (limited to 'CryptoPP/gost.cpp')
| -rw-r--r-- | CryptoPP/gost.cpp | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/CryptoPP/gost.cpp b/CryptoPP/gost.cpp deleted file mode 100644 index bbd829752..000000000 --- a/CryptoPP/gost.cpp +++ /dev/null @@ -1,123 +0,0 @@ -#include "pch.h" -#include "gost.h" -#include "misc.h" - -NAMESPACE_BEGIN(CryptoPP) - -// these are the S-boxes given in Applied Cryptography 2nd Ed., p. 333 -const byte GOST::Base::sBox[8][16]={ - {4, 10, 9, 2, 13, 8, 0, 14, 6, 11, 1, 12, 7, 15, 5, 3}, - {14, 11, 4, 12, 6, 13, 15, 10, 2, 3, 8, 1, 0, 7, 5, 9}, - {5, 8, 1, 13, 10, 3, 4, 2, 14, 15, 12, 7, 6, 0, 9, 11}, - {7, 13, 10, 1, 0, 8, 9, 15, 14, 4, 6, 12, 11, 2, 5, 3}, - {6, 12, 7, 1, 5, 15, 13, 8, 4, 10, 9, 14, 0, 3, 11, 2}, - {4, 11, 10, 0, 7, 2, 1, 13, 3, 6, 8, 5, 9, 12, 15, 14}, - {13, 11, 4, 1, 3, 15, 5, 9, 0, 10, 14, 7, 6, 8, 2, 12}, - {1, 15, 13, 0, 5, 7, 10, 4, 9, 2, 3, 14, 6, 11, 8, 12}}; - -/* // these are the S-boxes given in the GOST source code listing in Applied - // Cryptography 2nd Ed., p. 644. they appear to be from the DES S-boxes - {13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7 }, - { 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1 }, - {12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11 }, - { 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9 }, - { 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15 }, - {10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8 }, - {15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10 }, - {14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7 }}; -*/ - -volatile bool GOST::Base::sTableCalculated = false; -word32 GOST::Base::sTable[4][256]; - -void GOST::Base::UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &) -{ - AssertValidKeyLength(length); - - PrecalculateSTable(); - - GetUserKey(LITTLE_ENDIAN_ORDER, key.begin(), 8, userKey, KEYLENGTH); -} - -void GOST::Base::PrecalculateSTable() -{ - if (!sTableCalculated) - { - for (unsigned i = 0; i < 4; i++) - for (unsigned j = 0; j < 256; j++) - { - word32 temp = sBox[2*i][j%16] | (sBox[2*i+1][j/16] << 4); - sTable[i][j] = rotlMod(temp, 11+8*i); - } - - sTableCalculated=true; - } -} - -#define f(x) ( t=x, \ - sTable[3][GETBYTE(t, 3)] ^ sTable[2][GETBYTE(t, 2)] \ - ^ sTable[1][GETBYTE(t, 1)] ^ sTable[0][GETBYTE(t, 0)] ) - -typedef BlockGetAndPut<word32, LittleEndian> Block; - -void GOST::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - word32 n1, n2, t; - - Block::Get(inBlock)(n1)(n2); - - for (unsigned int i=0; i<3; i++) - { - n2 ^= f(n1+key[0]); - n1 ^= f(n2+key[1]); - n2 ^= f(n1+key[2]); - n1 ^= f(n2+key[3]); - n2 ^= f(n1+key[4]); - n1 ^= f(n2+key[5]); - n2 ^= f(n1+key[6]); - n1 ^= f(n2+key[7]); - } - - n2 ^= f(n1+key[7]); - n1 ^= f(n2+key[6]); - n2 ^= f(n1+key[5]); - n1 ^= f(n2+key[4]); - n2 ^= f(n1+key[3]); - n1 ^= f(n2+key[2]); - n2 ^= f(n1+key[1]); - n1 ^= f(n2+key[0]); - - Block::Put(xorBlock, outBlock)(n2)(n1); -} - -void GOST::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - word32 n1, n2, t; - - Block::Get(inBlock)(n1)(n2); - - n2 ^= f(n1+key[0]); - n1 ^= f(n2+key[1]); - n2 ^= f(n1+key[2]); - n1 ^= f(n2+key[3]); - n2 ^= f(n1+key[4]); - n1 ^= f(n2+key[5]); - n2 ^= f(n1+key[6]); - n1 ^= f(n2+key[7]); - - for (unsigned int i=0; i<3; i++) - { - n2 ^= f(n1+key[7]); - n1 ^= f(n2+key[6]); - n2 ^= f(n1+key[5]); - n1 ^= f(n2+key[4]); - n2 ^= f(n1+key[3]); - n1 ^= f(n2+key[2]); - n2 ^= f(n1+key[1]); - n1 ^= f(n2+key[0]); - } - - Block::Put(xorBlock, outBlock)(n2)(n1); -} - -NAMESPACE_END |