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// private header for Serpent and Sosemanuk
NAMESPACE_BEGIN(CryptoPP)
// linear transformation
#define LT(i,a,b,c,d,e) {\
a = rotlFixed(a, 13); \ c = rotlFixed(c, 3); \ d = rotlFixed(d ^ c ^ (a << 3), 7); \ b = rotlFixed(b ^ a ^ c, 1); \ a = rotlFixed(a ^ b ^ d, 5); \ c = rotlFixed(c ^ d ^ (b << 7), 22);}
// inverse linear transformation
#define ILT(i,a,b,c,d,e) {\
c = rotrFixed(c, 22); \ a = rotrFixed(a, 5); \ c ^= d ^ (b << 7); \ a ^= b ^ d; \ b = rotrFixed(b, 1); \ d = rotrFixed(d, 7) ^ c ^ (a << 3); \ b ^= a ^ c; \ c = rotrFixed(c, 3); \ a = rotrFixed(a, 13);}
// order of output from S-box functions
#define beforeS0(f) f(0,a,b,c,d,e)
#define afterS0(f) f(1,b,e,c,a,d)
#define afterS1(f) f(2,c,b,a,e,d)
#define afterS2(f) f(3,a,e,b,d,c)
#define afterS3(f) f(4,e,b,d,c,a)
#define afterS4(f) f(5,b,a,e,c,d)
#define afterS5(f) f(6,a,c,b,e,d)
#define afterS6(f) f(7,a,c,d,b,e)
#define afterS7(f) f(8,d,e,b,a,c)
// order of output from inverse S-box functions
#define beforeI7(f) f(8,a,b,c,d,e)
#define afterI7(f) f(7,d,a,b,e,c)
#define afterI6(f) f(6,a,b,c,e,d)
#define afterI5(f) f(5,b,d,e,c,a)
#define afterI4(f) f(4,b,c,e,a,d)
#define afterI3(f) f(3,a,b,e,c,d)
#define afterI2(f) f(2,b,d,e,c,a)
#define afterI1(f) f(1,a,b,c,e,d)
#define afterI0(f) f(0,a,d,b,e,c)
// The instruction sequences for the S-box functions
// come from Dag Arne Osvik's paper "Speeding up Serpent".
#define S0(i, r0, r1, r2, r3, r4) \
{ \ r3 ^= r0; \ r4 = r1; \ r1 &= r3; \ r4 ^= r2; \ r1 ^= r0; \ r0 |= r3; \ r0 ^= r4; \ r4 ^= r3; \ r3 ^= r2; \ r2 |= r1; \ r2 ^= r4; \ r4 = ~r4; \ r4 |= r1; \ r1 ^= r3; \ r1 ^= r4; \ r3 |= r0; \ r1 ^= r3; \ r4 ^= r3; \ }
#define I0(i, r0, r1, r2, r3, r4) \
{ \ r2 = ~r2; \ r4 = r1; \ r1 |= r0; \ r4 = ~r4; \ r1 ^= r2; \ r2 |= r4; \ r1 ^= r3; \ r0 ^= r4; \ r2 ^= r0; \ r0 &= r3; \ r4 ^= r0; \ r0 |= r1; \ r0 ^= r2; \ r3 ^= r4; \ r2 ^= r1; \ r3 ^= r0; \ r3 ^= r1; \ r2 &= r3; \ r4 ^= r2; \ }
#define S1(i, r0, r1, r2, r3, r4) \
{ \ r0 = ~r0; \ r2 = ~r2; \ r4 = r0; \ r0 &= r1; \ r2 ^= r0; \ r0 |= r3; \ r3 ^= r2; \ r1 ^= r0; \ r0 ^= r4; \ r4 |= r1; \ r1 ^= r3; \ r2 |= r0; \ r2 &= r4; \ r0 ^= r1; \ r1 &= r2; \ r1 ^= r0; \ r0 &= r2; \ r0 ^= r4; \ }
#define I1(i, r0, r1, r2, r3, r4) \
{ \ r4 = r1; \ r1 ^= r3; \ r3 &= r1; \ r4 ^= r2; \ r3 ^= r0; \ r0 |= r1; \ r2 ^= r3; \ r0 ^= r4; \ r0 |= r2; \ r1 ^= r3; \ r0 ^= r1; \ r1 |= r3; \ r1 ^= r0; \ r4 = ~r4; \ r4 ^= r1; \ r1 |= r0; \ r1 ^= r0; \ r1 |= r4; \ r3 ^= r1; \ }
#define S2(i, r0, r1, r2, r3, r4) \
{ \ r4 = r0; \ r0 &= r2; \ r0 ^= r3; \ r2 ^= r1; \ r2 ^= r0; \ r3 |= r4; \ r3 ^= r1; \ r4 ^= r2; \ r1 = r3; \ r3 |= r4; \ r3 ^= r0; \ r0 &= r1; \ r4 ^= r0; \ r1 ^= r3; \ r1 ^= r4; \ r4 = ~r4; \ }
#define I2(i, r0, r1, r2, r3, r4) \
{ \ r2 ^= r3; \ r3 ^= r0; \ r4 = r3; \ r3 &= r2; \ r3 ^= r1; \ r1 |= r2; \ r1 ^= r4; \ r4 &= r3; \ r2 ^= r3; \ r4 &= r0; \ r4 ^= r2; \ r2 &= r1; \ r2 |= r0; \ r3 = ~r3; \ r2 ^= r3; \ r0 ^= r3; \ r0 &= r1; \ r3 ^= r4; \ r3 ^= r0; \ }
#define S3(i, r0, r1, r2, r3, r4) \
{ \ r4 = r0; \ r0 |= r3; \ r3 ^= r1; \ r1 &= r4; \ r4 ^= r2; \ r2 ^= r3; \ r3 &= r0; \ r4 |= r1; \ r3 ^= r4; \ r0 ^= r1; \ r4 &= r0; \ r1 ^= r3; \ r4 ^= r2; \ r1 |= r0; \ r1 ^= r2; \ r0 ^= r3; \ r2 = r1; \ r1 |= r3; \ r1 ^= r0; \ }
#define I3(i, r0, r1, r2, r3, r4) \
{ \ r4 = r2; \ r2 ^= r1; \ r1 &= r2; \ r1 ^= r0; \ r0 &= r4; \ r4 ^= r3; \ r3 |= r1; \ r3 ^= r2; \ r0 ^= r4; \ r2 ^= r0; \ r0 |= r3; \ r0 ^= r1; \ r4 ^= r2; \ r2 &= r3; \ r1 |= r3; \ r1 ^= r2; \ r4 ^= r0; \ r2 ^= r4; \ }
#define S4(i, r0, r1, r2, r3, r4) \
{ \ r1 ^= r3; \ r3 = ~r3; \ r2 ^= r3; \ r3 ^= r0; \ r4 = r1; \ r1 &= r3; \ r1 ^= r2; \ r4 ^= r3; \ r0 ^= r4; \ r2 &= r4; \ r2 ^= r0; \ r0 &= r1; \ r3 ^= r0; \ r4 |= r1; \ r4 ^= r0; \ r0 |= r3; \ r0 ^= r2; \ r2 &= r3; \ r0 = ~r0; \ r4 ^= r2; \ }
#define I4(i, r0, r1, r2, r3, r4) \
{ \ r4 = r2; \ r2 &= r3; \ r2 ^= r1; \ r1 |= r3; \ r1 &= r0; \ r4 ^= r2; \ r4 ^= r1; \ r1 &= r2; \ r0 = ~r0; \ r3 ^= r4; \ r1 ^= r3; \ r3 &= r0; \ r3 ^= r2; \ r0 ^= r1; \ r2 &= r0; \ r3 ^= r0; \ r2 ^= r4; \ r2 |= r3; \ r3 ^= r0; \ r2 ^= r1; \ }
#define S5(i, r0, r1, r2, r3, r4) \
{ \ r0 ^= r1; \ r1 ^= r3; \ r3 = ~r3; \ r4 = r1; \ r1 &= r0; \ r2 ^= r3; \ r1 ^= r2; \ r2 |= r4; \ r4 ^= r3; \ r3 &= r1; \ r3 ^= r0; \ r4 ^= r1; \ r4 ^= r2; \ r2 ^= r0; \ r0 &= r3; \ r2 = ~r2; \ r0 ^= r4; \ r4 |= r3; \ r2 ^= r4; \ }
#define I5(i, r0, r1, r2, r3, r4) \
{ \ r1 = ~r1; \ r4 = r3; \ r2 ^= r1; \ r3 |= r0; \ r3 ^= r2; \ r2 |= r1; \ r2 &= r0; \ r4 ^= r3; \ r2 ^= r4; \ r4 |= r0; \ r4 ^= r1; \ r1 &= r2; \ r1 ^= r3; \ r4 ^= r2; \ r3 &= r4; \ r4 ^= r1; \ r3 ^= r0; \ r3 ^= r4; \ r4 = ~r4; \ }
#define S6(i, r0, r1, r2, r3, r4) \
{ \ r2 = ~r2; \ r4 = r3; \ r3 &= r0; \ r0 ^= r4; \ r3 ^= r2; \ r2 |= r4; \ r1 ^= r3; \ r2 ^= r0; \ r0 |= r1; \ r2 ^= r1; \ r4 ^= r0; \ r0 |= r3; \ r0 ^= r2; \ r4 ^= r3; \ r4 ^= r0; \ r3 = ~r3; \ r2 &= r4; \ r2 ^= r3; \ }
#define I6(i, r0, r1, r2, r3, r4) \
{ \ r0 ^= r2; \ r4 = r2; \ r2 &= r0; \ r4 ^= r3; \ r2 = ~r2; \ r3 ^= r1; \ r2 ^= r3; \ r4 |= r0; \ r0 ^= r2; \ r3 ^= r4; \ r4 ^= r1; \ r1 &= r3; \ r1 ^= r0; \ r0 ^= r3; \ r0 |= r2; \ r3 ^= r1; \ r4 ^= r0; \ }
#define S7(i, r0, r1, r2, r3, r4) \
{ \ r4 = r2; \ r2 &= r1; \ r2 ^= r3; \ r3 &= r1; \ r4 ^= r2; \ r2 ^= r1; \ r1 ^= r0; \ r0 |= r4; \ r0 ^= r2; \ r3 ^= r1; \ r2 ^= r3; \ r3 &= r0; \ r3 ^= r4; \ r4 ^= r2; \ r2 &= r0; \ r4 = ~r4; \ r2 ^= r4; \ r4 &= r0; \ r1 ^= r3; \ r4 ^= r1; \ }
#define I7(i, r0, r1, r2, r3, r4) \
{ \ r4 = r2; \ r2 ^= r0; \ r0 &= r3; \ r2 = ~r2; \ r4 |= r3; \ r3 ^= r1; \ r1 |= r0; \ r0 ^= r2; \ r2 &= r4; \ r1 ^= r2; \ r2 ^= r0; \ r0 |= r2; \ r3 &= r4; \ r0 ^= r3; \ r4 ^= r1; \ r3 ^= r4; \ r4 |= r0; \ r3 ^= r2; \ r4 ^= r2; \ }
// key xor
#define KX(r, a, b, c, d, e) {\
a ^= k[4 * r + 0]; \ b ^= k[4 * r + 1]; \ c ^= k[4 * r + 2]; \ d ^= k[4 * r + 3];}
#define LK(r, a, b, c, d, e) {\
a = k[(8-r)*4 + 0]; \ b = k[(8-r)*4 + 1]; \ c = k[(8-r)*4 + 2]; \ d = k[(8-r)*4 + 3];}
#define SK(r, a, b, c, d, e) {\
k[(8-r)*4 + 4] = a; \ k[(8-r)*4 + 5] = b; \ k[(8-r)*4 + 6] = c; \ k[(8-r)*4 + 7] = d;}
void Serpent_KeySchedule(word32 *k, unsigned int rounds, const byte *userKey, size_t keylen);
NAMESPACE_END
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