fix(pingora): admit OOXML manuscripts by fail-closed structural DOCX evidence - #2355
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…evidence
late-life-anxiety-reanalysis#257's required OpenCode bootstrap (run
35808203458 / job 107013612421, exit 2) failed inside the trusted central
`scripts/ci/pingora_edge_policy.py` with
Runtime policy candidate docs/delivery_interim_20260920/
air_render_00cdc51_g7integration_20260921_205341/
manuscript_interim_20260921.docx is not valid UTF-8
`.docx` had no `BINARY_DOCUMENT_MAGIC` entry, so a tracked research
manuscript under `docs/` was never a candidate binary documentation asset
and reached the ordinary content scan's UTF-8 decode, which fails closed
for any genuinely binary file.
Reuse the module's existing `_binary_documentation_evidence_confirms`
path rather than adding a parallel mechanism: register `.docx` in
`BINARY_DOCUMENT_MAGIC` and dispatch it to a new `_is_complete_docx`,
a sibling of `_is_complete_hwpx`. Admission is proved structurally --
unprefixed ZIP, exact end record with a consistent comment length, unique
members, every part in `DOCX_REQUIRED_PARTS` present, non-empty and
unencrypted, and `DOCX_MAIN_DOCUMENT_CONTENT_TYPE` declared in a
`[Content_Types].xml` read bounded by `MAX_DOCX_CONTENT_TYPES_BYTES`.
Unlike HWPX a conforming `.docx` has no stored `mimetype` member and
DEFLATEs every part, so neither is required.
Nothing becomes neutral or skipped and no file type is blanket-exempted:
a truncated, prefixed, appended-to, encrypted, entryless, duplicated or
non-WordprocessingML package returns False and falls through to the same
scan as before, which still fails the policy. A file that decodes as
valid UTF-8 is still never treated as a binary artifact, and
`docs/nginx/*.docx` stays rejected on `_runtime_path_rule`. The research
artifact is not deleted, relocated, renamed or excluded.
`.docx` under a declared #2193 artifact prefix is now held to this
structural proof instead of the UTF-8 complement -- strictly narrower,
failing closed in the same direction.
Verified offline against the real exact-head bytes of PR#257
(706a81e5a6f88ad74544ab9cf89d4da2b9e6a44d, 95620 bytes, under the 1 MiB
Contents API ceiling): `_is_complete_docx` returns True for the artifact
and False for its truncated and script-prefixed variants. The fixture in
`tests/test_pingora_docx_evidence.py` reproduces that container shape
without copying another repository's artifact into this one.
Refs: ContextualWisdomLab/late-life-anxiety-reanalysis#257
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FvosNg4GVUjaV5UfrimrsX
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📝 WalkthroughWalkthroughDOCX 파일을 바이너리 문서 형식으로 인식하고, 지정된 경로에서 OOXML 구조를 확인하도록 정책을 변경했습니다. 새 테스트는 유효한 DOCX와 손상된 패키지, 런타임 콘텐츠, 경로 조건 및 삭제된 파일의 처리를 검증합니다. ChangesDOCX 검증
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix Merge Risk: 🟡 Moderate · up to Malformed DOCX packages can be admitted as binary documentation, while another corrupt package can interrupt policy execution. Fix the structural checks and error handling before merging. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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The existing disguise case prefixes a shell script, which is rejected at the `PK\x03\x04` magic check before `_is_complete_docx` ever evaluates `archive_entries[0].header_offset != 0`. Mirror the HWPX suite's `b"PK\x03\x04" + archive_bytes` case so the claim that a prefixed container is blocked is actually exercised: zipfile opens that file with a non-zero concat offset, so admission must fail on the member offset, not on the magic prefix. Refs: ContextualWisdomLab/late-life-anxiety-reanalysis#257 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01FvosNg4GVUjaV5UfrimrsX
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Merge HOLD at Defect. Reproduction, 564 bytes. A ZIP with exactly the three Fix assigned to this PR's owner, in this lane:
Regressions required, with the positive proven in the same run as the negatives: the 564-byte counterexample above; expected MIME present only as a Deleting or relocating the research artifact, or granting a blanket documentation exemption, is not a resolution. No re-run, merge or approval while this HOLD stands. |
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Actionable comments posted: 3
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In `@scripts/ci/pingora_edge_policy.py`:
- Line 712: Update _is_complete_docx to parse [Content_Types].xml and verify
that the Override for /word/document.xml has the expected DOCX main-document
ContentType. Do not accept a matching MIME string found only in comments or
assigned to another part.
- Line 713: Update the exception handling in _is_complete_docx to catch
zlib.error when reading the compressed [Content_Types].xml data, so corrupted
DEFLATE data returns False instead of terminating the check.
- Around line 703-706: Update the DOCX_REQUIRED_PARTS validation loop to read
each required archive member fully within the existing size limit, rejecting
decompression or CRC errors before approval. Preserve the current
encrypted-member and empty-file checks.
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scripts/ci/pingora_edge_policy.pytests/test_pingora_docx_evidence.py
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…bstring The first cut ended `_is_complete_docx` with `DOCX_MAIN_DOCUMENT_CONTENT_TYPE in declaration` -- a raw-bytes substring test on `[Content_Types].xml`. Reproduced bypass, 578 bytes: a ZIP with exactly the three `DOCX_REQUIRED_PARTS` where the expected MIME appears only inside an XML comment, the real `Override` for `/word/document.xml` declares `application/octet-stream`, `_rels/.rels` is `not xml at all` and `word/document.xml` is `also not xml`, was admitted and so skipped the content scan. Replace the substring test with bounded structural parsing: - `_docx_part_elements` reads each required part bounded (the read *is* the expansion bound; a declared ZIP size is never trusted), decodes strict UTF-8, refuses U+0000 and the `<!DOCTYPE` literal, then parses with the standard library's expat, collecting element names and attributes only. No DTD means no internal entity declaration, so no entity expansion and no billion-laughs; expat resolves no external resource on its own and an undefined entity is a parse error. All three parts must be well-formed. - `_docx_declares_main_document` requires the OPC content-types root and exactly one `Override` pairing `/word/document.xml` with `DOCX_MAIN_DOCUMENT_CONTENT_TYPE`. A `Default Extension` mapping, a comment, an ambiguous duplicate pair, or any other content type does not satisfy it. - `_docx_relates_main_document` requires the OPC relationships root and exactly one internal `officeDocument` relationship whose `Target` is exactly the main document part in either permitted spelling. Exact matching is the path-traversal rejection: nothing is resolved or normalized, so no target outside the package can agree. - `zlib.error` joins the except tuple; a corrupt deflate stream returned False by way of a traceback out of the gate before. `defusedxml` is deliberately not imported. The required workflow runs this module with the runner's stock `python3` and has no `pip install` or `setup-python` step at all (`.github/workflows/opencode-review.yml`, `required-workflow-bootstrap`, lines 34-293); `defusedxml` belongs to the Noema review image (`opencode-review-dispatch.yml:810-817`), not to this gate. A module-level import of it would `ImportError` in every consumer repository's required check, and depending on an unpinned runner package inside a `pull_request_target` trust boundary would breach this repo's hash-pinning discipline. The guarantee `forbid_dtd=True` provides is reconstructed above instead, with no library added either way. The existing prefix, runtime-path and HWPX boundaries are untouched, and `_is_complete_hwpx` is unchanged. Bandit is clean at the central medium/medium gate (`xml.parsers.expat` is B407, LOW severity, and no blacklisted call is used, so no suppression is introduced). Tests: 66 cases, adding the reported counterexample, `Default`-mapping MIME, missing/duplicate/mismatched `Override`, non-well-formed `_rels/.rels` and `word/document.xml` separately, a relationship target pointing elsewhere or outside the package, `TargetMode="External"`, per-part DTD/NUL/UTF-16/undefined-entity/non-UTF-8 refusal, per-part oversize, and a corrupt deflate stream -- all False -- plus positives for both target spellings, explicit `TargetMode="Internal"`, and the ISO 29500 Strict main-document namespace. `test_real_artifact_bytes_are_admitted` binds admission to the actual #257 bytes when `PINGORA_REAL_DOCX_PATH` names a local copy, so the positive and the negatives are proved in one invocation without committing another repository's artifact here. Refs: ContextualWisdomLab/late-life-anxiety-reanalysis#257 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01FvosNg4GVUjaV5UfrimrsX
Hardened after review: substring MIME test replaced by parsed OPC structureThe first cut of Fixed at
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HOLD lifted on the bypass at
So the substring test is gone and admission now rests on structure: exactly one On instruction 4 ( Two additions the owner made beyond what I asked, both of which I agree with: the ISO 29500 Strict main-document namespace is accepted, since Word emits it with the same content type and pinning only the transitional namespace would have silently rejected legitimate manuscripts; and Still true: nothing was deleted, relocated, renamed or blanket-exempted, the research artifact stands, and |
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Defect
ContextualWisdomLab/late-life-anxiety-reanalysis#257(exact head706a81e5a6f88ad74544ab9cf89d4da2b9e6a44d, base observed by the required bootstrapbcea8006560e50412b630cf8eb5c12d8a7633e5e) fails its required OpenCode bootstrap — run35808203458/ job107013612421, exit2— inside this repository's trusted centralscripts/ci/pingora_edge_policy.pyat central SHAe6334e229:.docxhad noBINARY_DOCUMENT_MAGICentry, so a tracked research manuscript underdocs/was never a candidate binary documentation asset (_is_binary_documentation_asset), fell through_needs_content_scan(a binary file never carries a GitHub diffpatch), and hit_load_file_content's UTF-8 decode, which fails closed for any genuinely binary file. This is a central admission-coverage defect, not a research-repository finding.Admission contract
A fail-closed structural DOCX admission, reusing the module's existing
_binary_documentation_evidence_confirmspath rather than adding a parallel mechanism:.docxis registered inBINARY_DOCUMENT_MAGIC(PK\x03\x04) and dispatched to a new_is_complete_docx, a sibling of_is_complete_hwpx._is_complete_docxproves the container, never the text: unprefixed ZIP, exactPK\x05\x06end record with a consistent declared comment length, first local header at offset 0, unique member names, every part inDOCX_REQUIRED_PARTS([Content_Types].xml,_rels/.rels,word/document.xml) present, non-empty and unencrypted, andDOCX_MAIN_DOCUMENT_CONTENT_TYPEdeclared in a[Content_Types].xmlread bounded byMAX_DOCX_CONTENT_TYPES_BYTES..docxhas no storedmimetypemember and DEFLATEs every part, so neither is required.Nothing becomes neutral or skipped and no file type is blanket-exempted. Anything unreadable, truncated, prefixed, appended to, encrypted, entryless, duplicated, or declaring a non-WordprocessingML content type returns
Falseand falls through to exactly the scan that runs today, which still fails the policy. A file that decodes as valid UTF-8 is still never treated as a binary artifact, anddocs/nginx/*.docxstays rejected on_runtime_path_rule. The research artifact is not deleted, relocated, renamed or excluded..docxunder a declared issue #2193 artifact prefix is now held to this structural proof instead of the UTF-8 complement — strictly narrower, failing closed in the same direction.Evidence
e6334e229: the three valid-DOCX admission cases and the bounded-declaration case fail, the real-path case with the verbatim CI messageRuntime policy candidate docs/delivery_interim_20260920/.../manuscript_interim_20260921.docx is not valid UTF-8(6 failed, 18 passed).131 passedacrosstests/test_pingora_docx_evidence.py,tests/test_pingora_hwpx_evidence.py,tests/test_pingora_edge_policy.py,tests/test_pingora_edge_workflow_contract.py.git fetch --depth=1:_is_complete_docxreturnsTruefor the artifact andFalsefor its truncated and#!/bin/sh-prefixed variants. The fixture intests/test_pingora_docx_evidence.pyreproduces that container shape without copying another repository's artifact into this one.interrogate:PASSED (minimum: 100.0%, actual: 100.0%).No PR#257 re-run, merge, retarget, protection bypass, token or auth change; nothing in the late-life repository was edited.
Scope note: the CodeQL verdict-publication / exact-shard-requeue defect from the same diagnosis (run
35808205558/ job107046179304, exit1; later dispatch job107084906428) is not in this PR — those files are owned by #2040 / #2129 / #2271 / #2275.Refs: ContextualWisdomLab/late-life-anxiety-reanalysis#257
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Summary by CodeRabbit
.docx파일이 검사 과정에서 정상적인 문서 형식으로 인식됩니다..docx파일은 허용되지 않습니다..docx파일은 기존 런타임 정책 검사를 계속 적용합니다.