Audiovox P965 Arkusz Danych Pobierz pdf (Strona 115)

API In CPP

112

SET(c, d, a, b, 3, 16, T43);

SET(b, c, d, a, 6, 23, T44);

SET(a, b, c, d, 9, 4, T45);

SET(d, a, b, c, 12, 11, T46);

SET(c, d, a, b, 15, 16, T47);

SET(b, c, d, a, 2, 23, T48);

#undef SET

/* Round 4. */

/* Let [abcd k s t] denote the operation

a = b + ((a + I(b,c,d) + X[k] + T[i]) <<< s). */

#define I(x, y, z) ((y) ^ ((x) | ~(z)))

#define SET(a, b, c, d, k, s, Ti)\

t = a + I(b,c,d) + X[k] + Ti;\

a = ROTATE_LEFT(t, s) + b

/* Do the following 16 operations. */

SET(a, b, c, d, 0, 6, T49);

SET(d, a, b, c, 7, 10, T50);

SET(c, d, a, b, 14, 15, T51);

SET(b, c, d, a, 5, 21, T52);

SET(a, b, c, d, 12, 6, T53);

SET(d, a, b, c, 3, 10, T54);

SET(c, d, a, b, 10, 15, T55);

SET(b, c, d, a, 1, 21, T56);

SET(a, b, c, d, 8, 6, T57);

SET(d, a, b, c, 15, 10, T58);

SET(c, d, a, b, 6, 15, T59);

SET(b, c, d, a, 13, 21, T60);

SET(a, b, c, d, 4, 6, T61);

SET(d, a, b, c, 11, 10, T62);

SET(c, d, a, b, 2, 15, T63);

SET(b, c, d, a, 9, 21, T64);

#undef SET

/* Then perform the following additions. (That is increment each

of the four registers by the value it had before this block

was started.) */

pms->abcd[0] += a;

pms->abcd[1] += b;

pms->abcd[2] += c;

pms->abcd[3] += d;

}

void

md5_init(md5_state_t *pms)

{

pms->count[0] = pms->count[1] = 0;

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