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Diffstat (limited to 'CryptoPP/square.cpp')
| -rw-r--r-- | CryptoPP/square.cpp | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/CryptoPP/square.cpp b/CryptoPP/square.cpp deleted file mode 100644 index 00e6bddbe..000000000 --- a/CryptoPP/square.cpp +++ /dev/null @@ -1,177 +0,0 @@ -// square.cpp - written and placed in the public domain by Wei Dai -// Based on Paulo S.L.M. Barreto's public domain implementation - -#include "pch.h" -#include "square.h" -#include "misc.h" -#include "gf256.h" - -NAMESPACE_BEGIN(CryptoPP) - -// apply theta to a roundkey -static void SquareTransform (word32 in[4], word32 out[4]) -{ - static const byte G[4][4] = - { - 0x02U, 0x01U, 0x01U, 0x03U, - 0x03U, 0x02U, 0x01U, 0x01U, - 0x01U, 0x03U, 0x02U, 0x01U, - 0x01U, 0x01U, 0x03U, 0x02U - }; - - GF256 gf256(0xf5); - - for (int i = 0; i < 4; i++) - { - word32 temp = 0; - for (int j = 0; j < 4; j++) - for (int k = 0; k < 4; k++) - temp ^= (word32)gf256.Multiply(GETBYTE(in[i], 3-k), G[k][j]) << ((3-j)*8); - out[i] = temp; - } -} - -#define roundkeys(i, j) m_roundkeys[(i)*4+(j)] -#define roundkeys4(i) (m_roundkeys+(i)*4) - -void Square::Base::UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &) -{ - AssertValidKeyLength(length); - - static const word32 offset[ROUNDS] = { - 0x01000000UL, 0x02000000UL, 0x04000000UL, 0x08000000UL, - 0x10000000UL, 0x20000000UL, 0x40000000UL, 0x80000000UL, - }; - - GetUserKey(BIG_ENDIAN_ORDER, m_roundkeys.data(), KEYLENGTH/4, userKey, KEYLENGTH); - - /* apply the key evolution function */ - for (int i = 1; i < ROUNDS+1; i++) - { - roundkeys(i, 0) = roundkeys(i-1, 0) ^ rotlFixed(roundkeys(i-1, 3), 8U) ^ offset[i-1]; - roundkeys(i, 1) = roundkeys(i-1, 1) ^ roundkeys(i, 0); - roundkeys(i, 2) = roundkeys(i-1, 2) ^ roundkeys(i, 1); - roundkeys(i, 3) = roundkeys(i-1, 3) ^ roundkeys(i, 2); - } - - /* produce the round keys */ - if (IsForwardTransformation()) - { - for (int i = 0; i < ROUNDS; i++) - SquareTransform (roundkeys4(i), roundkeys4(i)); - } - else - { - for (int i = 0; i < ROUNDS/2; i++) - for (int j = 0; j < 4; j++) - std::swap(roundkeys(i, j), roundkeys(ROUNDS-i, j)); - SquareTransform (roundkeys4(ROUNDS), roundkeys4(ROUNDS)); - } -} - -#define MSB(x) (((x) >> 24) & 0xffU) /* most significant byte */ -#define SSB(x) (((x) >> 16) & 0xffU) /* second in significance */ -#define TSB(x) (((x) >> 8) & 0xffU) /* third in significance */ -#define LSB(x) (((x) ) & 0xffU) /* least significant byte */ - -#define squareRound(text, temp, T0, T1, T2, T3, roundkey) \ -{ \ - temp[0] = T0[MSB (text[0])] \ - ^ T1[MSB (text[1])] \ - ^ T2[MSB (text[2])] \ - ^ T3[MSB (text[3])] \ - ^ roundkey[0]; \ - temp[1] = T0[SSB (text[0])] \ - ^ T1[SSB (text[1])] \ - ^ T2[SSB (text[2])] \ - ^ T3[SSB (text[3])] \ - ^ roundkey[1]; \ - temp[2] = T0[TSB (text[0])] \ - ^ T1[TSB (text[1])] \ - ^ T2[TSB (text[2])] \ - ^ T3[TSB (text[3])] \ - ^ roundkey[2]; \ - temp[3] = T0[LSB (text[0])] \ - ^ T1[LSB (text[1])] \ - ^ T2[LSB (text[2])] \ - ^ T3[LSB (text[3])] \ - ^ roundkey[3]; \ -} /* squareRound */ - -#define squareFinal(text, temp, S, roundkey) \ -{ \ - text[0] = ((word32) (S[MSB (temp[0])]) << 24) \ - ^ ((word32) (S[MSB (temp[1])]) << 16) \ - ^ ((word32) (S[MSB (temp[2])]) << 8) \ - ^ (word32) (S[MSB (temp[3])]) \ - ^ roundkey[0]; \ - text[1] = ((word32) (S[SSB (temp[0])]) << 24) \ - ^ ((word32) (S[SSB (temp[1])]) << 16) \ - ^ ((word32) (S[SSB (temp[2])]) << 8) \ - ^ (word32) (S[SSB (temp[3])]) \ - ^ roundkey[1]; \ - text[2] = ((word32) (S[TSB (temp[0])]) << 24) \ - ^ ((word32) (S[TSB (temp[1])]) << 16) \ - ^ ((word32) (S[TSB (temp[2])]) << 8) \ - ^ (word32) (S[TSB (temp[3])]) \ - ^ roundkey[2]; \ - text[3] = ((word32) (S[LSB (temp[0])]) << 24) \ - ^ ((word32) (S[LSB (temp[1])]) << 16) \ - ^ ((word32) (S[LSB (temp[2])]) << 8) \ - ^ (word32) (S[LSB (temp[3])]) \ - ^ roundkey[3]; \ -} /* squareFinal */ - -typedef BlockGetAndPut<word32, BigEndian> Block; - -void Square::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - word32 text[4], temp[4]; - Block::Get(inBlock)(text[0])(text[1])(text[2])(text[3]); - - /* initial key addition */ - text[0] ^= roundkeys(0, 0); - text[1] ^= roundkeys(0, 1); - text[2] ^= roundkeys(0, 2); - text[3] ^= roundkeys(0, 3); - - /* ROUNDS - 1 full rounds */ - for (int i=1; i+1<ROUNDS; i+=2) - { - squareRound (text, temp, Te[0], Te[1], Te[2], Te[3], roundkeys4(i)); - squareRound (temp, text, Te[0], Te[1], Te[2], Te[3], roundkeys4(i+1)); - } - squareRound (text, temp, Te[0], Te[1], Te[2], Te[3], roundkeys4(ROUNDS-1)); - - /* last round (diffusion becomes only transposition) */ - squareFinal (text, temp, Se, roundkeys4(ROUNDS)); - - Block::Put(xorBlock, outBlock)(text[0])(text[1])(text[2])(text[3]); -} - -void Square::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const -{ - word32 text[4], temp[4]; - Block::Get(inBlock)(text[0])(text[1])(text[2])(text[3]); - - /* initial key addition */ - text[0] ^= roundkeys(0, 0); - text[1] ^= roundkeys(0, 1); - text[2] ^= roundkeys(0, 2); - text[3] ^= roundkeys(0, 3); - - /* ROUNDS - 1 full rounds */ - for (int i=1; i+1<ROUNDS; i+=2) - { - squareRound (text, temp, Td[0], Td[1], Td[2], Td[3], roundkeys4(i)); - squareRound (temp, text, Td[0], Td[1], Td[2], Td[3], roundkeys4(i+1)); - } - squareRound (text, temp, Td[0], Td[1], Td[2], Td[3], roundkeys4(ROUNDS-1)); - - /* last round (diffusion becomes only transposition) */ - squareFinal (text, temp, Sd, roundkeys4(ROUNDS)); - - Block::Put(xorBlock, outBlock)(text[0])(text[1])(text[2])(text[3]); -} - -NAMESPACE_END |