shambles MIPS

bello.c

// dati smerdati input = smerdo
void sub4(int i, int smerdo) {
    int *deadboob = 0xaddress;
    bool v0 = 0;

    i *= 4;
    int t0 = deadboob[i];

    int t2;
    for (int j = 0; j != 32; ++j) {

        t2 = smerdo >> j;
        t2 &= 1;

        if (t2 != 0) {
            t2 = t0 >> t3;
            t2 &= 1;
            v0 ^= t2;
            v0 &= 1;
        }
    }

    t0 = deadboob[i] / 2;
    t0 *= -v0;
    deadboob[i] = t0;
}


int *input_utente;
*inizio_char_strani

void main() {

    write(input_utente, 0, 32)
    check_length(32);
    swap_input(); // smerda l'input usando i char strani. è un for

    for (j = 0; j < 32; j++) {
        for (i = 0; i < 8: ++i) {
            encrypt_word(i, input_utente[i * 4])
        }
        swap_encrypted_words();
    }

    check_encrypted()
}

shambles.c

a0 = s0, a1 = dati smerdata input
bool subb4(int a0, int a1) {
    char *s2 = 0xdeadb00b; // s2
    a0 *= 4;
    s2 += a0;
    int t0 = s2[0];
    int t3=0;
    bool v0=0;

    do {
        int t2 = a1 >> t3;
        t2 &= 1;

        if (t2 == 0) {

        } else {
            t2 = t0 >> t3;
            t2 &= 1; // 0 or 1
            v0 ^= t2;
            v0 &= 1;
        }

        t3 += 1;
        t5 = t3 - 32;
    } while (t5 != 0);

    t0 = *s2;
    t0 >> 1; // useless
    v0 << 31;
    t0 |= v0; // useless
    *s2 = t0;
    return v0;
}