| Opcode | SQF Construct | |--------|---------------------| | 0x01 | if | | 0x02 | then | | 0x03 | else | | 0x10 | while | | 0x11 | do | | 0x20 | call (function) | | 0x21 | _localVar |
Offset 0: 0xDE 0xB1 (Magic) Offset 2: uint16 version (observed: 1, 2, 5) Offset 4: uint32 uncompressed_size The debinarizer validates the magic, then selects the appropriate decoder. DayZ uses a variant of LZSS with a 4KB sliding window. Unlike standard LZSS, the flag byte is stored after each literal run. Algorithm 1 describes the depacking loop. P3d Debinarizer Dayz
p3d_debin.py --input dayz_server.p3d --output recovered_script.sqf --rename heuristics 5. EVALUATION We tested the debinarizer on 50 packed script files from a popular DayZ community mod (unidentified for ethical review). Ground truth was obtained by requesting the original .sqf sources from the mod author (shared under NDA for research). 5.1 Syntactic Correctness We measured whether decompiled scripts compiled back to bytecode identical (or functionally equivalent) to the original after repacking. Algorithm 1 describes the depacking loop