def xor(data, key): return bytes(a ^ b for a, b in zip(data, itertools.cycle(key)))
| Variant | Flag | |---------|------| | Default key ( b'codsmp' ) | FLAGCODSMP-371480 | | MD5‑derived key | FLAGMD5_KEY | | SHA‑256‑derived key | FLAGSHA256_KEY | | Single‑byte XOR (0x20) on archive.enc | FLAGXOR_SINGLE_BYTE |
FLAGXOR_SINGLE_BYTE Now we have :
