hashbro
75 lines
2.2 KiB
Python
75 lines
2.2 KiB
Python
"""Decrypt/encrypt xxbb details 7zAES wires (show.html / *.js)."""
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from __future__ import annotations
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import shutil
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import subprocess
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import tempfile
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from pathlib import Path
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try:
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import py7zr
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except ImportError as exc: # pragma: no cover
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raise SystemExit(f"py7zr import failed: {exc}. pip install py7zr") from exc
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SEVEN_ZIP_PASSWORD = "202800cfb1ad3de68e11239dcc26c30b"
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# Matches original corepayload.js wire size closely (~521913).
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_7Z_PACK_FILTER = "LZMA2"
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def _find_7z() -> str:
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for name in ("7z", "7za"):
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path = shutil.which(name)
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if path:
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return path
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raise SystemExit(
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"7z required to pack xxbb details archives. Install p7zip / 7-Zip."
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)
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def extract_member(archive: bytes, *, password: str = SEVEN_ZIP_PASSWORD) -> tuple[str, bytes]:
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with tempfile.TemporaryDirectory() as tmp:
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root = Path(tmp)
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arc = root / "in.7z"
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arc.write_bytes(archive)
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with py7zr.SevenZipFile(arc, mode="r", password=password) as handle:
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names = handle.getnames()
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if len(names) != 1:
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raise SystemExit(f"expected one archive member, got {names!r}")
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handle.extractall(path=root)
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member = names[0]
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data = (root / member).read_bytes()
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return Path(member).name, data
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def make_passworded_7z(
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member_name: str,
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payload: bytes,
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*,
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password: str = SEVEN_ZIP_PASSWORD,
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) -> bytes:
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arc_name = Path(member_name).name
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seven = _find_7z()
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with tempfile.TemporaryDirectory() as tmp:
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archive = Path(tmp) / "out.7z"
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cmd = [
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seven,
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"a",
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"-t7z",
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f"-m0={_7Z_PACK_FILTER}",
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"-mhe=on",
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f"-p{password}",
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f"-si{arc_name}",
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"-y",
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"-bso0",
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"-bsp0",
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str(archive),
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]
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proc = subprocess.run(cmd, input=payload, capture_output=True)
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if proc.returncode != 0 or not archive.is_file():
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detail = (proc.stderr or proc.stdout or b"").decode("utf-8", "replace").strip()
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raise RuntimeError(
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f"7z -si pack failed (code {proc.returncode}): {detail or 'no output'}"
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)
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return archive.read_bytes()
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