9 NAMESPACE_BEGIN(CryptoPP)
11 static word64 SHARKTransform(word64 a)
13 static const byte iG[8][8] = {
14 0xe7, 0x30, 0x90, 0x85, 0xd0, 0x4b, 0x91, 0x41,
15 0x53, 0x95, 0x9b, 0xa5, 0x96, 0xbc, 0xa1, 0x68,
16 0x02, 0x45, 0xf7, 0x65, 0x5c, 0x1f, 0xb6, 0x52,
17 0xa2, 0xca, 0x22, 0x94, 0x44, 0x63, 0x2a, 0xa2,
18 0xfc, 0x67, 0x8e, 0x10, 0x29, 0x75, 0x85, 0x71,
19 0x24, 0x45, 0xa2, 0xcf, 0x2f, 0x22, 0xc1, 0x0e,
20 0xa1, 0xf1, 0x71, 0x40, 0x91, 0x27, 0x18, 0xa5,
21 0x56, 0xf4, 0xaf, 0x32, 0xd2, 0xa4, 0xdc, 0x71,
26 for (
unsigned int i=0; i<8; i++)
27 for(
unsigned int j=0; j<8; j++)
28 result ^= word64(gf256.Multiply(iG[i][j], GF256::Element(a>>(56-8*j)))) << (56-8*i);
32 void SHARK::Base::UncheckedSetKey(
const byte *key,
unsigned int keyLen,
const NameValuePairs ¶ms)
34 AssertValidKeyLength(keyLen);
36 m_rounds = GetRoundsAndThrowIfInvalid(params,
this);
37 m_roundKeys.New(m_rounds+1);
40 for (
unsigned int i=0; i<(m_rounds+1)*8; i++)
41 ((byte *)m_roundKeys.begin())[i] = key[i%keyLen];
45 byte
IV[8] = {0,0,0,0,0,0,0,0};
48 cfb.ProcessString((byte *)m_roundKeys.begin(), (m_rounds+1)*8);
50 ConditionalByteReverse(BIG_ENDIAN_ORDER, m_roundKeys.begin(), m_roundKeys.begin(), (m_rounds+1)*8);
52 m_roundKeys[m_rounds] = SHARKTransform(m_roundKeys[m_rounds]);
54 if (!IsForwardTransformation())
59 for (i=0; i<m_rounds/2; i++)
60 std::swap(m_roundKeys[i], m_roundKeys[m_rounds-i]);
62 for (i=1; i<m_rounds; i++)
63 m_roundKeys[i] = SHARKTransform(m_roundKeys[i]);
66 #ifdef IS_LITTLE_ENDIAN
67 m_roundKeys[0] = ByteReverse(m_roundKeys[0]);
68 m_roundKeys[m_rounds] = ByteReverse(m_roundKeys[m_rounds]);
73 void SHARK::Enc::InitForKeySetup()
75 m_rounds = DEFAULT_ROUNDS;
76 m_roundKeys.New(DEFAULT_ROUNDS+1);
78 for (
unsigned int i=0; i<DEFAULT_ROUNDS; i++)
79 m_roundKeys[i] = cbox[0][i];
81 m_roundKeys[DEFAULT_ROUNDS] = SHARKTransform(cbox[0][DEFAULT_ROUNDS]);
83 #ifdef IS_LITTLE_ENDIAN
84 m_roundKeys[0] = ByteReverse(m_roundKeys[0]);
85 m_roundKeys[m_rounds] = ByteReverse(m_roundKeys[m_rounds]);
89 typedef word64 ArrayOf256Word64s[256];
91 template <const byte *sbox, const ArrayOf256Word64s *cbox>
93 inline SharkProcessAndXorBlock(
const word64 *roundKeys,
unsigned int rounds,
const byte *inBlock,
const byte *xorBlock, byte *outBlock)
95 word64 tmp = *(word64 *)inBlock ^ roundKeys[0];
97 ByteOrder order = GetNativeByteOrder();
98 tmp = cbox[0][GetByte(order, tmp, 0)] ^ cbox[1][GetByte(order, tmp, 1)]
99 ^ cbox[2][GetByte(order, tmp, 2)] ^ cbox[3][GetByte(order, tmp, 3)]
100 ^ cbox[4][GetByte(order, tmp, 4)] ^ cbox[5][GetByte(order, tmp, 5)]
101 ^ cbox[6][GetByte(order, tmp, 6)] ^ cbox[7][GetByte(order, tmp, 7)]
104 for(
unsigned int i=2; i<rounds; i++)
106 tmp = cbox[0][GETBYTE(tmp, 7)] ^ cbox[1][GETBYTE(tmp, 6)]
107 ^ cbox[2][GETBYTE(tmp, 5)] ^ cbox[3][GETBYTE(tmp, 4)]
108 ^ cbox[4][GETBYTE(tmp, 3)] ^ cbox[5][GETBYTE(tmp, 2)]
109 ^ cbox[6][GETBYTE(tmp, 1)] ^ cbox[7][GETBYTE(tmp, 0)]
114 (sbox[GETBYTE(tmp, 7)])
115 (sbox[GETBYTE(tmp, 6)])
116 (sbox[GETBYTE(tmp, 5)])
117 (sbox[GETBYTE(tmp, 4)])
118 (sbox[GETBYTE(tmp, 3)])
119 (sbox[GETBYTE(tmp, 2)])
120 (sbox[GETBYTE(tmp, 1)])
121 (sbox[GETBYTE(tmp, 0)]);
123 *(word64 *)outBlock ^= roundKeys[rounds];
126 void SHARK::Enc::ProcessAndXorBlock(
const byte *inBlock,
const byte *xorBlock, byte *outBlock)
const
131 void SHARK::Dec::ProcessAndXorBlock(
const byte *inBlock,
const byte *xorBlock, byte *outBlock)
const