// 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

key = bytearray(SIZE) csum = 0 for i in range(SIZE-1): key[i] = inv_rotl8(0, i % 8) ^ CONST_XOR # keep transformed byte = 0 # csum unchanged (adds 0) // Compute a 4‑byte checksum over the transformed

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