chuanqi/cq2_sdk/scripts/decrypt_other_caches.py

"""Decrypt the OTHER game caches (218620, 2912) and search for
Encode6BitBuf Lua implementations or network protocol details.

cache_218620 = 千河微变三职业 (same engine, 1844 lua)
cache_2912   = unknown game (44 lua)
"""
import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).parent))
from decrypt_client_lua import decrypt_file

BASE = Path(r"D:\ProgramFiles\996box\GameBoxDownload\1\cq")
OUT = Path("lua-dec2")

for cache, label in [("cache_218620", "千河微变"), ("cache_2912", "game2912")]:
    src_root = BASE / cache
    files = list(src_root.rglob("*.lua"))
    print(f"=== {label} ({cache}): {len(files)} lua files ===")
    out_root = OUT / cache
    ok = 0
    for f in files:
        rel = f.relative_to(src_root)
        if decrypt_file(f, out_root / rel):
            ok += 1
    print(f"  decrypted {ok}/{len(files)}")
    print()

print("=== grep Encode6BitBuf in newly decrypted caches ===")
for cache in ["cache_218620", "cache_2912"]:
    root = OUT / cache
    if not root.exists():
        continue
    for f in root.rglob("*.lua"):
        try:
            txt = f.read_text(encoding="utf-8", errors="replace")
        except Exception:
            continue
        if "Encode6BitBuf" in txt:
            idx = txt.find("Encode6BitBuf")
            # find function definition (not just call)
            window = txt[max(0, idx - 200) : idx + 500]
            if "function" in window[:250]:
                print(f"*** DEFINITION: {f.relative_to(OUT)} @ {idx} ***")
                print(window)
                print()
            else:
                print(f"call site: {f.relative_to(OUT)} @ {idx}")

print()
print("=== also grep 'function Encode' / 'Encode6' as definition ===")
for f in OUT.rglob("*.lua"):
    try:
        txt = f.read_text(encoding="utf-8", errors="replace")
    except Exception:
        continue
    for needle in ("function Encode6", "Encode6BitBuf =", "Encode6BitBuf=function"):
        idx = txt.find(needle)
        if idx >= 0:
            print(f"*** {f.relative_to(OUT)} @ {idx}: {needle} ***")
            print(txt[idx : idx + 500])
            print()