11 #if CRYPTOPP_MSC_VERSION 12 # pragma warning(disable: 4244) 15 #if CRYPTOPP_GCC_DIAGNOSTIC_AVAILABLE 16 # pragma GCC diagnostic ignored "-Wmissing-braces" 22 static
void SquareTransform (word32 in[4], word32 out[4])
24 static const byte G[4][4] =
26 0x02U, 0x01U, 0x01U, 0x03U,
27 0x03U, 0x02U, 0x01U, 0x01U,
28 0x01U, 0x03U, 0x02U, 0x01U,
29 0x01U, 0x01U, 0x03U, 0x02U
34 for (
int i = 0; i < 4; i++)
37 for (
unsigned int j = 0; j < 4; j++)
38 for (
unsigned int k = 0; k < 4; k++)
39 temp ^= (word32)gf256.Multiply(GETBYTE(in[i], 3-k), G[k][j]) << ((3-j)*8);
44 #define roundkeys(i, j) m_roundkeys[(i)*4+(j)] 45 #define roundkeys4(i) (m_roundkeys+(i)*4) 47 void Square::Base::UncheckedSetKey(
const byte *userKey,
unsigned int length,
const NameValuePairs &)
49 AssertValidKeyLength(length);
51 static const word32 offset[ROUNDS] = {
52 0x01000000UL, 0x02000000UL, 0x04000000UL, 0x08000000UL,
53 0x10000000UL, 0x20000000UL, 0x40000000UL, 0x80000000UL,
56 GetUserKey(BIG_ENDIAN_ORDER, m_roundkeys.data(), KEYLENGTH/4, userKey, KEYLENGTH);
59 for (
int i = 1; i < ROUNDS+1; i++)
61 roundkeys(i, 0) = roundkeys(i-1, 0) ^
rotlFixed(roundkeys(i-1, 3), 8U) ^ offset[i-1];
62 roundkeys(i, 1) = roundkeys(i-1, 1) ^ roundkeys(i, 0);
63 roundkeys(i, 2) = roundkeys(i-1, 2) ^ roundkeys(i, 1);
64 roundkeys(i, 3) = roundkeys(i-1, 3) ^ roundkeys(i, 2);
68 if (IsForwardTransformation())
70 for (
int i = 0; i < ROUNDS; i++)
71 SquareTransform (roundkeys4(i), roundkeys4(i));
75 for (
int i = 0; i < ROUNDS/2; i++)
76 for (
int j = 0; j < 4; j++)
77 std::swap(roundkeys(i, j), roundkeys(ROUNDS-i, j));
78 SquareTransform (roundkeys4(ROUNDS), roundkeys4(ROUNDS));
82 #define MSB(x) (((x) >> 24) & 0xffU) 83 #define SSB(x) (((x) >> 16) & 0xffU) 84 #define TSB(x) (((x) >> 8) & 0xffU) 85 #define LSB(x) (((x) ) & 0xffU) 87 #define squareRound(text, temp, T0, T1, T2, T3, roundkey) \ 89 temp[0] = T0[MSB (text[0])] \ 94 temp[1] = T0[SSB (text[0])] \ 99 temp[2] = T0[TSB (text[0])] \ 100 ^ T1[TSB (text[1])] \ 101 ^ T2[TSB (text[2])] \ 102 ^ T3[TSB (text[3])] \ 104 temp[3] = T0[LSB (text[0])] \ 105 ^ T1[LSB (text[1])] \ 106 ^ T2[LSB (text[2])] \ 107 ^ T3[LSB (text[3])] \ 111 #define squareFinal(text, temp, S, roundkey) \ 113 text[0] = ((word32) (S[MSB (temp[0])]) << 24) \ 114 ^ ((word32) (S[MSB (temp[1])]) << 16) \ 115 ^ ((word32) (S[MSB (temp[2])]) << 8) \ 116 ^ (word32) (S[MSB (temp[3])]) \ 118 text[1] = ((word32) (S[SSB (temp[0])]) << 24) \ 119 ^ ((word32) (S[SSB (temp[1])]) << 16) \ 120 ^ ((word32) (S[SSB (temp[2])]) << 8) \ 121 ^ (word32) (S[SSB (temp[3])]) \ 123 text[2] = ((word32) (S[TSB (temp[0])]) << 24) \ 124 ^ ((word32) (S[TSB (temp[1])]) << 16) \ 125 ^ ((word32) (S[TSB (temp[2])]) << 8) \ 126 ^ (word32) (S[TSB (temp[3])]) \ 128 text[3] = ((word32) (S[LSB (temp[0])]) << 24) \ 129 ^ ((word32) (S[LSB (temp[1])]) << 16) \ 130 ^ ((word32) (S[LSB (temp[2])]) << 8) \ 131 ^ (word32) (S[LSB (temp[3])]) \ 137 void Square::Enc::ProcessAndXorBlock(
const byte *inBlock,
const byte *xorBlock, byte *outBlock)
const 139 word32 text[4], temp[4];
140 Block::Get(inBlock)(text[0])(text[1])(text[2])(text[3]);
143 text[0] ^= roundkeys(0, 0);
144 text[1] ^= roundkeys(0, 1);
145 text[2] ^= roundkeys(0, 2);
146 text[3] ^= roundkeys(0, 3);
149 for (
int i=1; i+1<ROUNDS; i+=2)
151 squareRound (text, temp, Te[0], Te[1], Te[2], Te[3], roundkeys4(i));
152 squareRound (temp, text, Te[0], Te[1], Te[2], Te[3], roundkeys4(i+1));
154 squareRound (text, temp, Te[0], Te[1], Te[2], Te[3], roundkeys4(ROUNDS-1));
157 squareFinal (text, temp, Se, roundkeys4(ROUNDS));
159 Block::Put(xorBlock, outBlock)(text[0])(text[1])(text[2])(text[3]);
162 void Square::Dec::ProcessAndXorBlock(
const byte *inBlock,
const byte *xorBlock, byte *outBlock)
const 164 word32 text[4], temp[4];
165 Block::Get(inBlock)(text[0])(text[1])(text[2])(text[3]);
168 text[0] ^= roundkeys(0, 0);
169 text[1] ^= roundkeys(0, 1);
170 text[2] ^= roundkeys(0, 2);
171 text[3] ^= roundkeys(0, 3);
174 for (
int i=1; i+1<ROUNDS; i+=2)
176 squareRound (text, temp, Td[0], Td[1], Td[2], Td[3], roundkeys4(i));
177 squareRound (temp, text, Td[0], Td[1], Td[2], Td[3], roundkeys4(i+1));
179 squareRound (text, temp, Td[0], Td[1], Td[2], Td[3], roundkeys4(ROUNDS-1));
182 squareFinal (text, temp, Sd, roundkeys4(ROUNDS));
184 Block::Put(xorBlock, outBlock)(text[0])(text[1])(text[2])(text[3]);
Utility functions for the Crypto++ library.
T rotlFixed(T x, unsigned int y)
Performs a left rotate.
Library configuration file.
GF(256) with polynomial basis.
Crypto++ library namespace.
Classes for the Square block cipher.
Interface for retrieving values given their names.