群英风华录解密有教的吗

import subprocess, argparse
from pathlib import Path

H = b"beeplay"; K = 0x44; O = 16; L = 8

def decrypt(data: bytes) -> bytes:
    buf = bytearray(data[len(H):])
    for i in range(L): buf[O + i] ^= K
    return bytes(buf)

def astc2png(astc: Path, png: Path, mode: str):
    subprocess.run(["astcenc", f"-d{mode}", str(astc), str(png)], check=True)

def main():
    p = argparse.ArgumentParser()
    p.add_argument("file")
    p.add_argument("--mode", choices=list("lshH"), default="l")
    p.add_argument("--outdir")
    a = p.parse_args()

    src = Path(a.file)
    outdir = Path(a.outdir) if a.outdir else src.parent
    outdir.mkdir(parents=True, exist_ok=True)

    astc = outdir / (src.stem + ".astc")
    png  = outdir / (src.stem + ".png")

    astc.write_bytes(decrypt(src.read_bytes()))
    astc2png(astc, png, a.mode)

if __name__ == "__main__":
    main()

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