feat: xxbb

2026-08-13 07:08:02 +08:00
parent c6e386e069
commit dbe6358a3c
11 changed files with 311 additions and 159 deletions
@@ -0,0 +1,74 @@
+"""Decrypt/encrypt xxbb details 7zAES wires (show.html / *.js)."""
+
+from __future__ import annotations
+
+import shutil
+import subprocess
+import tempfile
+from pathlib import Path
+
+try:
+    import py7zr
+except ImportError as exc:  # pragma: no cover
+    raise SystemExit("py7zr required: pip install py7zr") from exc
+
+SEVEN_ZIP_PASSWORD = "202800cfb1ad3de68e11239dcc26c30b"
+# Matches original corepayload.js wire size closely (~521913).
+_7Z_PACK_FILTER = "LZMA2"
+
+
+def _find_7z() -> str:
+    for name in ("7z", "7za"):
+        path = shutil.which(name)
+        if path:
+            return path
+    raise SystemExit(
+        "7z required to pack xxbb details archives. Install p7zip / 7-Zip."
+    )
+
+
+def extract_member(archive: bytes, *, password: str = SEVEN_ZIP_PASSWORD) -> tuple[str, bytes]:
+    with tempfile.TemporaryDirectory() as tmp:
+        root = Path(tmp)
+        arc = root / "in.7z"
+        arc.write_bytes(archive)
+        with py7zr.SevenZipFile(arc, mode="r", password=password) as handle:
+            names = handle.getnames()
+            if len(names) != 1:
+                raise SystemExit(f"expected one archive member, got {names!r}")
+            handle.extractall(path=root)
+        member = names[0]
+        data = (root / member).read_bytes()
+        return Path(member).name, data
+
+
+def make_passworded_7z(
+    member_name: str,
+    payload: bytes,
+    *,
+    password: str = SEVEN_ZIP_PASSWORD,
+) -> bytes:
+    arc_name = Path(member_name).name
+    seven = _find_7z()
+    with tempfile.TemporaryDirectory() as tmp:
+        archive = Path(tmp) / "out.7z"
+        cmd = [
+            seven,
+            "a",
+            "-t7z",
+            f"-m0={_7Z_PACK_FILTER}",
+            "-mhe=on",
+            f"-p{password}",
+            f"-si{arc_name}",
+            "-y",
+            "-bso0",
+            "-bsp0",
+            str(archive),
+        ]
+        proc = subprocess.run(cmd, input=payload, capture_output=True)
+        if proc.returncode != 0 or not archive.is_file():
+            detail = (proc.stderr or proc.stdout or b"").decode("utf-8", "replace").strip()
+            raise RuntimeError(
+                f"7z -si pack failed (code {proc.returncode}): {detail or 'no output'}"
+            )
+        return archive.read_bytes()