mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-10-10 21:43:23 -05:00
Abdessamad Derraz
a269f9b677
Resolving the profiles a run names, which refuses an alias or a launcher because neither has requirements of its own, and the structural checks on an archive that hold whatever it contains: a duplicate entry, an absolute path, a traversal, a zero-byte member. Complexity 58 to 50 and 63 to 51. Extracting the second surfaced a Counter it had been reading from the enclosing module, which pyflakes caught before the tests did.
662 lines
25 KiB
Python
662 lines
25 KiB
Python
"""Checking a built pack the way the frontend would.
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The builder and the verifier have to reach the same verdict on the
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same file, so both read the native mode from one place: a pack and a
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coverage report that disagree describe different collections."""
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from __future__ import annotations
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from collections import Counter
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from auto_fetch import DEFAULT_BIOS_DIR
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from artifacts import _build_timestamp
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from packextras import _collect_emulator_extras
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from packextras import _detect_extras_prefix
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from packpaths import _has_path_conflict
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from packpaths import _register_path
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from ziptools import build_zip_contents_index
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from ziptools import check_inside_zip
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from nativemode import digest_algorithm
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from nativemode import hash_mismatch_excludes_file
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import hashlib
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from common import load_emulator_profiles
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from common import load_platform_config
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import os
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from packextras import platform_region_groups
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from nativemode import reads_file_contents
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import region as region_mod
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from packresolve import resolve_file
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from common import sanitize_pack_path
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import zipfile
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def verify_pack(
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zip_path: str, db: dict, data_registry: dict | None = None
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) -> tuple[bool, dict]:
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"""Verify a generated pack ZIP by re-hashing every file inside.
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Checks against database.json, data directory caches, and verifies
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rebuilt ZIP content by comparing inner CRC32s against source.
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Returns (all_ok, manifest_dict).
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"""
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files_db = db.get("files", {}) # SHA1 -> file_info
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by_md5 = db.get("indexes", {}).get("by_md5", {}) # MD5 -> SHA1
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by_name = db.get("indexes", {}).get("by_name", {}) # name -> [SHA1]
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# Data directory file index
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_data_index: dict[str, list[str]] = {}
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_data_path_index: dict[str, str] = {}
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if data_registry:
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for _dk, _de in data_registry.items():
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cache = _de.get("local_cache", "")
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if not cache or not os.path.isdir(cache):
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continue
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for _r, _d, _fns in os.walk(cache):
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for _fn in _fns:
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_fp = os.path.join(_r, _fn)
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_rel = os.path.relpath(_fp, cache)
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_data_path_index[_rel] = _fp
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_data_index.setdefault(_fn, []).append(_fp)
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manifest = {
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"schema_version": 1,
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"version": 1,
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"generator": "retrobios generate_pack.py",
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"generated": _build_timestamp(db),
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"files": [],
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}
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errors = []
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with zipfile.ZipFile(zip_path, "r") as zf:
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for info in zf.infolist():
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if info.is_dir():
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continue
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name = info.filename
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if name.startswith("INSTRUCTIONS_") or name in (
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"manifest.json",
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"README.txt",
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):
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continue
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with zf.open(info) as f:
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sha1_h = hashlib.sha1()
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md5_h = hashlib.md5()
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size = 0
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for chunk in iter(lambda: f.read(65536), b""):
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sha1_h.update(chunk)
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md5_h.update(chunk)
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size += len(chunk)
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sha1 = sha1_h.hexdigest()
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md5 = md5_h.hexdigest()
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# Look up in database: files_db keyed by SHA1
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db_entry = files_db.get(sha1)
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status = "verified"
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file_name = ""
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if db_entry:
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file_name = db_entry.get("name", "")
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else:
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# Try MD5 -> SHA1 lookup
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ref_sha1 = by_md5.get(md5)
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if ref_sha1:
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db_entry = files_db.get(ref_sha1)
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if db_entry:
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file_name = db_entry.get("name", "")
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status = "verified_md5"
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else:
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status = "untracked"
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else:
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status = "untracked"
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# Rebuilt ZIP: verify inner ROM CRC32s match source
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if status == "untracked" and name.endswith(".zip"):
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_bn = os.path.basename(name)
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for _src_sha1 in by_name.get(_bn, []):
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if _src_sha1 not in files_db:
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continue
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_src_path = files_db[_src_sha1]["path"]
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if not os.path.exists(_src_path):
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continue
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try:
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import io as _io
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with zipfile.ZipFile(_src_path) as _sz:
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_sc = {
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i.filename: i.CRC
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for i in _sz.infolist()
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if not i.is_dir()
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}
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with zipfile.ZipFile(_io.BytesIO(zf.read(name))) as _pz:
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_pc = {
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i.filename: i.CRC
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for i in _pz.infolist()
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if not i.is_dir()
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}
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if _sc == _pc:
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status = "verified_rebuild"
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file_name = _bn
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break
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except (zipfile.BadZipFile, OSError):
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continue
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# Data directory: check against cached files
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if status == "untracked" and _data_index:
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_bn = os.path.basename(name)
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_pr = name
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for _known_prefix in ("system/", "bios/", "BIOS/", "Firmware/"):
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if name.startswith(_known_prefix):
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_pr = name[len(_known_prefix):]
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break
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_cands = []
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if _pr in _data_path_index:
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_cands.append(_data_path_index[_pr])
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for _dp in _data_index.get(_bn, []):
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if _dp not in _cands:
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_cands.append(_dp)
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for _dp in _cands:
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if not os.path.exists(_dp):
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continue
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if os.path.getsize(_dp) == size:
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status = "verified_data"
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file_name = _bn
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break
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if name.endswith(".zip") and _dp.endswith(".zip"):
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try:
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import io as _io2
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with zipfile.ZipFile(_io2.BytesIO(zf.read(name))) as _pz2:
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_pc2 = {
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i.filename: i.CRC
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for i in _pz2.infolist()
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if not i.is_dir()
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}
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with zipfile.ZipFile(_dp) as _dz:
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_dc = {
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i.filename: i.CRC
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for i in _dz.infolist()
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if not i.is_dir()
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}
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if _pc2 == _dc:
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status = "verified_data"
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file_name = _bn
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break
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except (zipfile.BadZipFile, OSError):
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continue
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manifest["files"].append(
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{
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"path": name,
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"sha1": sha1,
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"md5": md5,
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"size": size,
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"status": status,
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"name": file_name,
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}
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)
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# Corruption check: SHA1 in DB but doesn't match what we computed
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# This should never happen (we looked up by SHA1), but catches
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# edge cases where by_md5 resolved to a different SHA1
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if db_entry and status == "verified_md5":
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expected_sha1 = db_entry.get("sha1", "")
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if expected_sha1 and expected_sha1.lower() != sha1.lower():
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errors.append(
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f"{name}: SHA1 mismatch (expected {expected_sha1}, got {sha1})"
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)
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verified = sum(1 for f in manifest["files"] if f["status"].startswith("verified"))
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untracked = sum(1 for f in manifest["files"] if f["status"] == "untracked")
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total = len(manifest["files"])
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manifest["summary"] = {
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"total_files": total,
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"verified": verified,
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"untracked": untracked,
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"errors": len(errors),
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}
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manifest["errors"] = errors
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all_ok = len(errors) == 0
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return all_ok, manifest
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def generate_sha256sums(output_dir: str) -> str | None:
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"""Generate SHA256SUMS.txt for all ZIP files in output_dir."""
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sums_path = os.path.join(output_dir, "SHA256SUMS.txt")
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entries = []
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for name in sorted(os.listdir(output_dir)):
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if not name.endswith(".zip"):
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continue
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path = os.path.join(output_dir, name)
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sha256 = hashlib.sha256()
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with open(path, "rb") as f:
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for chunk in iter(lambda: f.read(65536), b""):
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sha256.update(chunk)
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entries.append(f"{sha256.hexdigest()} {name}")
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if not entries:
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return None
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with open(sums_path, "w") as f:
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f.write("\n".join(entries) + "\n")
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print(f"\n{sums_path}: {len(entries)} pack checksums")
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return sums_path
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def _hash_matches(declared: str, actual: str) -> bool:
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"""Compare a declared hash value against an actual hex digest.
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Handles comma-separated multi-hash lists and uppercase (Recalbox)
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and truncated MD5s (Batocera 29-char): a declared value shorter
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than the digest matches by prefix.
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"""
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actual = actual.lower()
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for cand in declared.split(","):
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cand = cand.strip().lower()
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if not cand:
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continue
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if len(cand) < len(actual):
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if actual.startswith(cand):
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return True
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elif actual == cand:
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return True
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return False
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def _check_member_hash(
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zf: zipfile.ZipFile, member: str, file_entry: dict, mode: str
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) -> str | None:
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"""Verify a pack member against its platform-declared hash.
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Reproduces the platform's native check inside the pack: md5/sha1 of
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the member bytes, or checkInsideZip when zipped_file is set
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(Batocera hashes a ROM inside the ZIP, matched case-insensitively).
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Returns an error string, or None when the member passes.
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"""
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declared = str(file_entry.get(mode) or "").strip()
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if not declared:
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return None
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zipped_file = file_entry.get("zipped_file")
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if zipped_file:
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import io
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try:
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with zipfile.ZipFile(io.BytesIO(zf.read(member))) as inner:
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want = zipped_file.casefold()
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target = next(
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(n for n in inner.namelist() if n.casefold() == want), None
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)
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if target is None:
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return f"{member}: {zipped_file} not found inside ZIP"
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actual = hashlib.md5(inner.read(target)).hexdigest()
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except zipfile.BadZipFile:
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return f"{member}: not a valid ZIP"
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if not _hash_matches(declared, actual):
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return (
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f"{member}: {zipped_file} inside-zip md5 {actual} "
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f"!= declared {declared}"
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)
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return None
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h = hashlib.md5() if mode == "md5" else hashlib.sha1()
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with zf.open(member) as f:
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for chunk in iter(lambda: f.read(65536), b""):
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h.update(chunk)
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actual = h.hexdigest()
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if _hash_matches(declared, actual):
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return None
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# Recalbox Md5Composite: MD5 over sorted inner contents of a ZIP,
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# independent of compression and metadata (Zip::Md5Composite()).
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if mode == "md5" and member.endswith(".zip"):
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import io
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try:
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with zipfile.ZipFile(io.BytesIO(zf.read(member))) as inner:
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names = sorted(n for n in inner.namelist() if not n.endswith("/"))
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ch = hashlib.md5()
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for n in names:
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ch.update(inner.read(n))
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if _hash_matches(declared, ch.hexdigest()):
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return None
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except (zipfile.BadZipFile, OSError):
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pass
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return f"{member}: {mode} {actual} != declared {declared}"
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def _repo_satisfies_declaration(
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entries: list[dict], db: dict, mode: str
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) -> bool:
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"""Check whether any repo file matches one of the declared hashes.
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Used to separate pack divergence (a matching file exists but was not
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packed) from data coverage gaps (no repo file matches the upstream
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declaration): only the former is a pack generation error.
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"""
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from common import md5_composite
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files_db = db.get("files", {})
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by_md5 = db.get("indexes", {}).get("by_md5", {})
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by_name = db.get("indexes", {}).get("by_name", {})
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for fe in entries:
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declared = str(fe.get(mode) or "").strip()
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if not declared:
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continue
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hashes = [h.strip().lower() for h in declared.split(",") if h.strip()]
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for h in hashes:
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if mode == "sha1":
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entry = files_db.get(h)
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else:
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entry = files_db.get(by_md5.get(h, ""))
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if entry and os.path.exists(entry.get("path", "")):
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return True
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if mode == "md5":
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hash_set = set(hashes)
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for cand_sha in by_name.get(fe.get("name", ""), []):
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entry = files_db.get(cand_sha)
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if not entry:
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continue
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path = entry.get("path", "")
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if not path.endswith(".zip") or not os.path.exists(path):
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continue
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try:
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if md5_composite(path).lower() in hash_set:
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return True
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except (zipfile.BadZipFile, OSError):
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continue
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return False
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def _intentional_hash_exclusion(
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entries: list[dict],
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db: dict,
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bios_dir: str = DEFAULT_BIOS_DIR,
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zip_contents: dict | None = None,
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data_dir_registry: dict | None = None,
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verification_mode: str = "md5",
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) -> bool:
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"""Return whether the builder must omit every declaration as unsafe.
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A hash platform never substitutes a same-named payload for an explicitly
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hash-identified one, so a missing pack member is accounted for when every
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declaration for that destination resolves to a local hash mismatch. An
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existence platform reads no bytes and the builder ships the file anyway,
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so nothing is ever excluded on its behalf. Genuine absence,
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external-download failure and a packable alternative stay conformance
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errors in both modes.
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"""
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if not entries or not hash_mismatch_excludes_file(verification_mode):
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return False
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archive_index = zip_contents if zip_contents is not None else {}
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for entry in entries:
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local_path, status = resolve_file(
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entry,
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db,
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bios_dir,
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archive_index,
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data_dir_registry=data_dir_registry,
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offline=True,
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)
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if status != "hash_mismatch":
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return False
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# A container can mismatch the outer declaration while still carrying
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# the exact inner ROM requested by Batocera-style zipped_file entries.
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zipped_file = entry.get("zipped_file")
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if zipped_file and local_path:
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declared = str(entry.get("md5") or "")
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candidates = [value.strip() for value in declared.split(",") if value.strip()]
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if not candidates:
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candidates = [""]
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if any(
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check_inside_zip(local_path, zipped_file, candidate) == "ok"
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for candidate in candidates
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):
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return False
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return True
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def _structural_errors(zf, zip_set: set) -> list[str]:
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"""Faults in the archive itself, before any file is looked up.
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A duplicate entry, an absolute path or a traversal makes the pack
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unsafe to extract whatever it contains, and a zero-byte member is a
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file the user will believe they have. The markers Dolphin ships for
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its graphics mods are legitimately empty.
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"""
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errors: list[str] = []
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# Structural checks
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dupes = sum(1 for c in Counter(zf.namelist()).values() if c > 1)
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if dupes:
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errors.append(f"{dupes} duplicate entries")
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for n in zip_set:
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if "//" in n:
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errors.append(f"double slash: {n}")
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if n.startswith("/"):
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errors.append(f"absolute path: {n}")
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if ".." in n:
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errors.append(f"path traversal: {n}")
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# Zero-byte check (exclude Dolphin GraphicMods markers)
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for info in zf.infolist():
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if info.file_size == 0 and not info.is_dir():
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if "GraphicMods" not in info.filename and info.filename not in (
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"manifest.json",
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"README.txt",
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):
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errors.append(f"zero-byte: {info.filename}")
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return errors
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def verify_pack_against_platform(
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zip_path: str,
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platform_name: str,
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platforms_dir: str,
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db: dict | None = None,
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emulators_dir: str = "emulators",
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emu_profiles: dict | None = None,
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regions: list[str] | None = None,
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data_registry: dict | None = None,
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) -> tuple[bool, int, int, list[str], int, int, int, int, int]:
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"""Verify a pack ZIP against its platform config and core requirements.
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A region priority list narrows the expectation to what the builder would
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have packed, using the same selection function.
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Checks:
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1. Every baseline file declared by the platform exists in the ZIP
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at the correct destination path
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2. Every in-repo core extra file (from emulator profiles) is present
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3. No duplicate entries
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4. No path anomalies (double slash, absolute, traversal)
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5. No unexpected zero-byte BIOS files
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Returns ``(all_ok, checked, present, errors, baseline_checked,
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baseline_present, core_checked, core_present, baseline_excluded)``.
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"""
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from collections import Counter
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config = load_platform_config(platform_name, platforms_dir)
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base_dest = config.get("base_destination", "")
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errors: list[str] = []
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checked = 0
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present = 0
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if emu_profiles is None:
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emu_profiles = load_emulator_profiles(emulators_dir)
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region_drops: set[str] = set()
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if regions:
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region_index = region_mod.build_region_index(emu_profiles)
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region_groups, _extra_dests = platform_region_groups(
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config,
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config.get("systems", {}),
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emulators_dir,
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db,
|
|
base_dest,
|
|
emu_profiles,
|
|
)
|
|
region_drops = region_mod.resolve_region_drops(
|
|
region_groups, region_index, regions
|
|
)
|
|
|
|
with zipfile.ZipFile(zip_path, "r") as zf:
|
|
zip_set = set(zf.namelist())
|
|
zip_lower = {n.lower(): n for n in zip_set}
|
|
|
|
# Auto-detect flat vs nested ZIP
|
|
is_flat = bool(base_dest) and not any(
|
|
n.startswith(base_dest + "/")
|
|
for n in zip_set
|
|
if n not in ("README.txt", "manifest.json") and not n.endswith("/")
|
|
)
|
|
|
|
errors.extend(_structural_errors(zf, zip_set))
|
|
|
|
# 1. Baseline file presence + native hash check
|
|
verification_mode = config.get("verification_mode", "existence")
|
|
baseline_checked = 0
|
|
baseline_present = 0
|
|
baseline_excluded = 0
|
|
decl_by_member: dict[str, list[dict]] = {}
|
|
# Mirror the builder's path-conflict logic: a declaration whose path
|
|
# collides file-vs-directory with a packed member was skipped by the
|
|
# builder (upstream declares e.g. both SGB1.sfc and SGB1.sfc/program.rom)
|
|
zip_parents: set[str] = set()
|
|
for n in zip_set:
|
|
parts = n.split("/")
|
|
for i in range(1, len(parts)):
|
|
zip_parents.add("/".join(parts[:i]))
|
|
baseline_groups: dict[str, list[dict]] = {}
|
|
for _sys_id, system in config.get("systems", {}).items():
|
|
for fe in system.get("files", []):
|
|
dest = sanitize_pack_path(fe.get("destination", fe.get("name", "")))
|
|
if not dest:
|
|
continue
|
|
if region_drops and dest in region_drops:
|
|
continue
|
|
expected = f"{base_dest}/{dest}" if base_dest and not is_flat else dest
|
|
baseline_groups.setdefault(expected, []).append(fe)
|
|
|
|
baseline_checked = len(baseline_groups)
|
|
exclusion_index = build_zip_contents_index(db) if db is not None else {}
|
|
for expected, declarations in baseline_groups.items():
|
|
if expected in zip_set:
|
|
member = expected
|
|
elif expected.lower() in zip_lower:
|
|
member = zip_lower[expected.lower()]
|
|
elif _has_path_conflict(expected, zip_set, zip_parents):
|
|
# Skipped by the builder for the same reason: not an error
|
|
baseline_present += 1
|
|
continue
|
|
elif db is not None and _intentional_hash_exclusion(
|
|
declarations,
|
|
db,
|
|
zip_contents=exclusion_index,
|
|
data_dir_registry=data_registry,
|
|
verification_mode=verification_mode,
|
|
):
|
|
baseline_excluded += 1
|
|
continue
|
|
else:
|
|
errors.append(f"baseline missing: {expected}")
|
|
continue
|
|
baseline_present += 1
|
|
decl_by_member.setdefault(member, []).extend(declarations)
|
|
|
|
# Reproduce the platform's native hash check on pack bytes.
|
|
# A destination declared by several entries passes when the packed
|
|
# member satisfies any of them. A failure only counts as a pack
|
|
# error when the repo holds a file matching a declaration: without
|
|
# one, the pack ships its best effort and the gap is a data issue
|
|
# reported by verify.py, not a generation bug.
|
|
digest = digest_algorithm(verification_mode)
|
|
if reads_file_contents(verification_mode) and digest:
|
|
for member, decl_entries in decl_by_member.items():
|
|
checkable = [
|
|
fe
|
|
for fe in decl_entries
|
|
if str(fe.get(digest) or "").strip()
|
|
]
|
|
if not checkable:
|
|
continue
|
|
member_errors = []
|
|
satisfied = False
|
|
for fe in checkable:
|
|
err = _check_member_hash(zf, member, fe, digest)
|
|
if err is None:
|
|
satisfied = True
|
|
break
|
|
member_errors.append(err)
|
|
if satisfied:
|
|
continue
|
|
if db is None or _repo_satisfies_declaration(
|
|
checkable, db, verification_mode
|
|
):
|
|
errors.append(member_errors[0])
|
|
|
|
# 2. Core extras presence (files from emulator profiles, in repo)
|
|
# Mirror the pack builder's skip logic: only count files that
|
|
# can actually be resolved and don't have path conflicts.
|
|
core_checked = 0
|
|
core_present = 0
|
|
if db is not None:
|
|
core_files = _collect_emulator_extras(
|
|
config,
|
|
emulators_dir,
|
|
db,
|
|
set(),
|
|
base_dest,
|
|
emu_profiles,
|
|
)
|
|
seen_conformance: set[str] = set(zip_set)
|
|
seen_parents: set[str] = set()
|
|
for n in zip_set:
|
|
parts = n.split("/")
|
|
for i in range(1, len(parts)):
|
|
seen_parents.add("/".join(parts[:i]))
|
|
extras_pfx = _detect_extras_prefix(config, base_dest)
|
|
for fe in core_files:
|
|
raw_dest = fe.get("destination", fe.get("name", ""))
|
|
dest = sanitize_pack_path(raw_dest)
|
|
if not dest:
|
|
continue
|
|
if region_drops and sanitize_pack_path(dest) in region_drops:
|
|
continue
|
|
if extras_pfx and not (is_flat and extras_pfx == base_dest):
|
|
if not dest.startswith(f"{extras_pfx}/"):
|
|
full = f"{extras_pfx}/{dest}"
|
|
else:
|
|
full = dest
|
|
else:
|
|
full = dest
|
|
# Skip path conflicts (same logic as pack builder)
|
|
if _has_path_conflict(full, seen_conformance, seen_parents):
|
|
continue
|
|
# Skip unresolvable files (game_data dirs, etc.)
|
|
local_path, status = resolve_file(
|
|
fe,
|
|
db,
|
|
"bios",
|
|
{},
|
|
dest_hint=raw_dest,
|
|
data_dir_registry=data_registry,
|
|
offline=True,
|
|
)
|
|
if status in ("not_found", "external", "user_provided"):
|
|
continue
|
|
core_checked += 1
|
|
if full in zip_set or full.lower() in zip_lower:
|
|
core_present += 1
|
|
seen_conformance.add(full)
|
|
_register_path(full, seen_conformance, seen_parents)
|
|
else:
|
|
errors.append(f"core missing: {full}")
|
|
|
|
checked = baseline_checked + core_checked
|
|
present = baseline_present + core_present
|
|
|
|
return (
|
|
len(errors) == 0,
|
|
checked,
|
|
present,
|
|
errors,
|
|
baseline_checked,
|
|
baseline_present,
|
|
core_checked,
|
|
core_present,
|
|
baseline_excluded,
|
|
)
|