btcollider/bf/scrypt-jane/code/scrypt-jane-mix_chacha.h
2018-04-04 15:18:34 +02:00

69 lines
No EOL
1.3 KiB
C

#if !defined(SCRYPT_CHOOSE_COMPILETIME) || !defined(SCRYPT_CHACHA_INCLUDED)
#undef SCRYPT_MIX
#define SCRYPT_MIX "ChaCha20/8 Ref"
#undef SCRYPT_CHACHA_INCLUDED
#define SCRYPT_CHACHA_INCLUDED
#define SCRYPT_CHACHA_BASIC
static void
chacha_core_basic(uint32_t state[16]) {
size_t rounds = 8;
uint32_t x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15,t;
x0 = state[0];
x1 = state[1];
x2 = state[2];
x3 = state[3];
x4 = state[4];
x5 = state[5];
x6 = state[6];
x7 = state[7];
x8 = state[8];
x9 = state[9];
x10 = state[10];
x11 = state[11];
x12 = state[12];
x13 = state[13];
x14 = state[14];
x15 = state[15];
#define quarter(a,b,c,d) \
a += b; t = d^a; d = ROTL32(t,16); \
c += d; t = b^c; b = ROTL32(t,12); \
a += b; t = d^a; d = ROTL32(t, 8); \
c += d; t = b^c; b = ROTL32(t, 7);
for (; rounds; rounds -= 2) {
quarter( x0, x4, x8,x12)
quarter( x1, x5, x9,x13)
quarter( x2, x6,x10,x14)
quarter( x3, x7,x11,x15)
quarter( x0, x5,x10,x15)
quarter( x1, x6,x11,x12)
quarter( x2, x7, x8,x13)
quarter( x3, x4, x9,x14)
}
state[0] += x0;
state[1] += x1;
state[2] += x2;
state[3] += x3;
state[4] += x4;
state[5] += x5;
state[6] += x6;
state[7] += x7;
state[8] += x8;
state[9] += x9;
state[10] += x10;
state[11] += x11;
state[12] += x12;
state[13] += x13;
state[14] += x14;
state[15] += x15;
#undef quarter
}
#endif