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Diffstat (limited to 'CryptoPP/shark.cpp')
| -rw-r--r-- | CryptoPP/shark.cpp | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/CryptoPP/shark.cpp b/CryptoPP/shark.cpp deleted file mode 100644 index 361147e23..000000000 --- a/CryptoPP/shark.cpp +++ /dev/null @@ -1,136 +0,0 @@ -// shark.cpp - written and placed in the public domain by Wei Dai - -#include "pch.h" -#include "shark.h" -#include "misc.h" -#include "modes.h" -#include "gf256.h" - -NAMESPACE_BEGIN(CryptoPP) - -static word64 SHARKTransform(word64 a) -{ - static const byte iG[8][8] = { - 0xe7, 0x30, 0x90, 0x85, 0xd0, 0x4b, 0x91, 0x41, - 0x53, 0x95, 0x9b, 0xa5, 0x96, 0xbc, 0xa1, 0x68, - 0x02, 0x45, 0xf7, 0x65, 0x5c, 0x1f, 0xb6, 0x52, - 0xa2, 0xca, 0x22, 0x94, 0x44, 0x63, 0x2a, 0xa2, - 0xfc, 0x67, 0x8e, 0x10, 0x29, 0x75, 0x85, 0x71, - 0x24, 0x45, 0xa2, 0xcf, 0x2f, 0x22, 0xc1, 0x0e, - 0xa1, 0xf1, 0x71, 0x40, 0x91, 0x27, 0x18, 0xa5, - 0x56, 0xf4, 0xaf, 0x32, 0xd2, 0xa4, 0xdc, 0x71, - }; - - word64 result=0; - GF256 gf256(0xf5); - for (unsigned int i=0; i<8; i++) - for(unsigned int j=0; j<8; j++) - result ^= word64(gf256.Multiply(iG[i][j], GF256::Element(a>>(56-8*j)))) << (56-8*i); - return result; -} - -void SHARK::Base::UncheckedSetKey(const byte *key, unsigned int keyLen, const NameValuePairs ¶ms) -{ - AssertValidKeyLength(keyLen); - - m_rounds = GetRoundsAndThrowIfInvalid(params, this); - m_roundKeys.New(m_rounds+1); - - // concatenate key enought times to fill a - for (unsigned int i=0; i<(m_rounds+1)*8; i++) - ((byte *)m_roundKeys.begin())[i] = key[i%keyLen]; - - SHARK::Encryption e; - e.InitForKeySetup(); - byte IV[8] = {0,0,0,0,0,0,0,0}; - CFB_Mode_ExternalCipher::Encryption cfb(e, IV); - - cfb.ProcessString((byte *)m_roundKeys.begin(), (m_rounds+1)*8); - - ConditionalByteReverse(BIG_ENDIAN_ORDER, m_roundKeys.begin(), m_roundKeys.begin(), (m_rounds+1)*8); - - m_roundKeys[m_rounds] = SHARKTransform(m_roundKeys[m_rounds]); - - if (!IsForwardTransformation()) - { - unsigned int i; - - // transform encryption round keys into decryption round keys - for (i=0; i<m_rounds/2; i++) - std::swap(m_roundKeys[i], m_roundKeys[m_rounds-i]); - - for (i=1; i<m_rounds; i++) - m_roundKeys[i] = SHARKTransform(m_roundKeys[i]); - } - -#ifdef IS_LITTLE_ENDIAN - m_roundKeys[0] = ByteReverse(m_roundKeys[0]); - m_roundKeys[m_rounds] = ByteReverse(m_roundKeys[m_rounds]); -#endif -} - -// construct an SHARK_Enc object with fixed round keys, to be used to initialize actual round keys -void SHARK::Enc::InitForKeySetup() -{ - m_rounds = DEFAULT_ROUNDS; - m_roundKeys.New(DEFAULT_ROUNDS+1); - - for (unsigned int i=0; i<DEFAULT_ROUNDS; i++) - m_roundKeys[i] = cbox[0][i]; - - m_roundKeys[DEFAULT_ROUNDS] = SHARKTransform(cbox[0][DEFAULT_ROUNDS]); - -#ifdef IS_LITTLE_ENDIAN - m_roundKeys[0] = ByteReverse(m_roundKeys[0]); - m_roundKeys[m_rounds] = ByteReverse(m_roundKeys[m_rounds]); -#endif -} - -typedef word64 ArrayOf256Word64s[256]; - -template <const byte *sbox, const ArrayOf256Word64s *cbox> -struct SharkProcessAndXorBlock{ // VC60 workaround: problem with template functions -inline SharkProcessAndXorBlock(const word64 *roundKeys, unsigned int rounds, const byte *inBlock, const byte *xorBlock, byte *outBlock) -{ - word64 tmp = *(word64 *)inBlock ^ roundKeys[0]; - - ByteOrder order = GetNativeByteOrder(); - tmp = cbox[0][GetByte(order, tmp, 0)] ^ cbox[1][GetByte(order, tmp, 1)] - ^ cbox[2][GetByte(order, tmp, 2)] ^ cbox[3][GetByte(order, tmp, 3)] - ^ cbox[4][GetByte(order, tmp, 4)] ^ cbox[5][GetByte(order, tmp, 5)] - ^ cbox[6][GetByte(order, tmp, 6)] ^ cbox[7][GetByte(order, tmp, 7)] - ^ roundKeys[1]; - - for(unsigned int i=2; i<rounds; i++) - { - tmp = cbox[0][GETBYTE(tmp, 7)] ^ cbox[1][GETBYTE(tmp, 6)] - ^ cbox[2][GETBYTE(tmp, 5)] ^ cbox[3][GETBYTE(tmp, 4)] - ^ cbox[4][GETBYTE(tmp, 3)] ^ cbox[5][GETBYTE(tmp, 2)] - ^ cbox[6][GETBYTE(tmp, 1)] ^ cbox[7][GETBYTE(tmp, 0)] - ^ roundKeys[i]; - } - - PutBlock<byte, BigEndian>(xorBlock, outBlock) - (sbox[GETBYTE(tmp, 7)]) - (sbox[GETBYTE(tmp, 6)]) - (sbox[GETBYTE(tmp, 5)]) - (sbox[GETBYTE(tmp, 4)]) - (sbox[GETBYTE(tmp, 3)]) - (sbox[GETBYTE(tmp, 2)]) - (sbox[GETBYTE(tmp, 1)]) - (sbox[GETBYTE(tmp, 0)]); - - *(word64 *)outBlock ^= roundKeys[rounds]; -}}; - -void SHARK::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - SharkProcessAndXorBlock<sbox, cbox>(m_roundKeys, m_rounds, inBlock, xorBlock, outBlock); -} - -void SHARK::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - SharkProcessAndXorBlock<sbox, cbox>(m_roundKeys, m_rounds, inBlock, xorBlock, outBlock); -} - -NAMESPACE_END |