fix(sdk): read a manifest.json entry from TDF archives - #406
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The OpenTDF spec puts the manifest at the archive root under `manifest.json`. `TDFReader` looked the entry up by exact name with no fallback, so a TDF produced by any implementation written against the published spec was rejected with `tdf doesn't contain a manifest` before any schema check ran. `SDK.isTDF` carried its own copy of the literal and screened such archives out one step earlier. The reader now accepts either name, preferring `manifest.json` when an archive carries both so a conformant entry is never passed over for a superseded one. `SDK.isTDF` accepts either name too. Read side only: the writer still emits `0.manifest.json`. Changing that is a breaking file-format change and is left to a separate change. Refs opentdf/platform#3513 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Signed-off-by: Paul Flynn <pflynn-virtru@users.noreply.github.com>
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📝 WalkthroughWalkthroughThe SDK adds a spec-defined ChangesManifest compatibility
Priority: ⬇️ Low Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant ZIP archive
participant SDK.isTDF
participant TDFReader
ZIP archive->>SDK.isTDF: Provide manifest and payload entries
SDK.isTDF-->>ZIP archive: Return true when a supported manifest and 0.payload exist
ZIP archive->>TDFReader: Provide archive entries
TDFReader-->>ZIP archive: Read manifest.json or 0.manifest.json
Suggested reviewers: Merge Risk: 🟡 Moderate · up to Archives carrying both the legacy and spec manifest names are rejected by SDK detection even though the reader can process them. Align detection with reader compatibility before merging. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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Sonar java:S9358 on the ternary around the two `entries.get` calls: the conditional belongs inside the operation. `getOrDefault` says the same thing in one lookup-shaped expression -- the spec name if present, the off-spec name otherwise -- and drops the separate `containsKey` probe. Entry values are never null, so the absent case is unambiguous. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Signed-off-by: Paul Flynn <pflynn-virtru@users.noreply.github.com>
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marked this pull request as ready for review
September 16, 2026 18:33
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In `@sdk/src/main/java/io/opentdf/platform/sdk/SDK.java`:
- Around line 175-176: Update isTDF so it validates that the required archive
entries are present without rejecting archives solely because entries.size() is
not exactly two. Preserve compatibility with archives containing both
manifest.json and 0.manifest.json, matching TDFReader’s selection of
manifest.json.
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sdk/src/main/java/io/opentdf/platform/sdk/SDK.javasdk/src/main/java/io/opentdf/platform/sdk/TDFReader.javasdk/src/main/java/io/opentdf/platform/sdk/TDFWriter.javasdk/src/test/java/io/opentdf/platform/sdk/SDKTest.javasdk/src/test/java/io/opentdf/platform/sdk/TDFReaderTest.java
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isTDF required the archive to hold exactly two entries. An archive carrying both manifest names holds three, and TDFReader now reads it by preferring the spec name -- so the sniffer rejected what the reader it screens for accepts. The count also made isTDF stricter than the reader generally: the spec fixes where the manifest lives, not what else the archive may hold. Entry presence is what isTDF was checking for; the count was never part of the structure it describes. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Signed-off-by: Paul Flynn <pflynn-virtru@users.noreply.github.com>
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Refs opentdf/platform#3513. The read half of #405, split out so it can land on its own.
Problem
The OpenTDF spec names the manifest entry in a
.tdfarchivemanifest.json:This SDK writes and reads
0.manifest.json. On the read sideTDFReaderdoes an exactcontainsKeywith no fallback, so a TDF produced by any implementation written against the published spec is rejected withtdf doesn't contain a manifestbefore any schema check runs.SDK.isTDFcarries its own copy of the literal, so such an archive is screened out one step earlier still.The
0.prefix is a holdover from an early design that anticipated several payload/manifest pairs per archive. That design never shipped.Change
Read —
TDFReaderprefersmanifest.jsonand falls back to0.manifest.json. Preference matters rather than first-match: an archive carrying both must not have its conformant entry passed over for the superseded one.Sniffing —
SDK.isTDFaccepts either name, so it does not reject an archive the reader can now read. It also no longer requires the archive to hold exactly two entries. That check was scoped out at first as unrelated to the entry name, but review pointed out it is not: an archive carrying both manifest names holds three entries, andprefersTheSpecNameWhenAnArchiveCarriesBothis precisely the case the reader now handles — so the sniffer would reject what the reader it screens for accepts. The count was never part of the structureisTDFdescribes; the spec fixes where the manifest lives, not what else the archive may hold.Write is untouched.
TDFWriterstill emits0.manifest.json, so this release produces byte-identical archives and every existing reader keeps working. The newTDF_MANIFEST_FILE_NAME_SPECconstant is read-side only. Flipping the writer is the breaking half and stays in #405.0.payloadis untouched. It is recorded in the manifest'spayload.url, so renaming it would alter manifest contents rather than just archive layout, and neither the spec nor opentdf/platform#4049 fixes it.Testing
Ported from #405, minus the write-side test:
TDFReaderTest.readsManifestUnderTheSpecNameIllegalArgumentException: tdf doesn't contain a manifestTDFReaderTest.readsThePayloadAlongsideASpecNamedManifestTDFReaderTest.prefersTheSpecNameWhenAnArchiveCarriesBothSDKTest.testExaminingTDFWithSpecManifestNamefalseSDKTest.testExaminingTDFWithBothManifestNamesfalse-- three entriesSDKTest.testExaminingTDFWithAnExtraEntryfalse-- three entriesprefersTheSpecNameWhenAnArchiveCarriesBothfiles a different manifest under each name, so it cannot pass by reading whichever entry the reader happened to pick.Guarding behavior that must not change:
TDFReaderTest.readsManifestUnderTheOffspecName,TDFReaderTest.rejectsAnArchiveWithNoManifestUnderEitherName,SDKTest.testExaminingZipWithNoManifest,SDKTest.testExaminingZipWithNoPayload, and the pre-existingSDKTest.testExaminingValidZTDF/testExaminingManifest, which run against the checked-in off-spec-namedsample.txt.tdffixture. The two negativeisTDFcases hold two entries each, so they failed for the name they were missing rather than for their entry count even before the count check came out.Not run locally. This machine has no JDK or Maven, so nothing was compiled or executed here; the tests themselves were watched failing against unmodified production code on #405's branch, where the shared code is identical. Draft until CI confirms.
Downstream impact
None. Readers gain a name they accept and
isTDFgains archive shapes it recognizes; nothing either previously accepted is taken away, and no archive this SDK writes changes.🤖 Generated with Claude Code
Summary by CodeRabbit
Compatibility
manifest.jsonentry name.0.manifest.jsonentry name.manifest.jsonentry is used.Bug Fixes