El: Capo 2 Cap 57

open("key.bin","wb").write(key)

// Compute a 4‑byte checksum over the transformed data uint32_t chk = 0; for (int i = 0; i < 64; i++) chk += tmp[i]; el capo 2 cap 57

def rotl8(v, r): return ((v << r) | (v >> (8 - r))) & 0xFF def inv_rotl8(v, r): return ((v >> r) | (v << (8 - r))) & 0xFF open("key