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… (DSPX-4584) The manifest was assembled entirely in memory on both paths, so a payload past ~21.7M segments (41 TiB at 2 MiB segments) hard-failed with OutOfMemoryError: Requested array size exceeds VM limit. - serialize the manifest straight into the zip entry and parse it from a Reader, so neither side materializes it as a Java String - add Manifest.Segments, a compact fixed-stride AbstractList<Segment> backed by packed hash bytes (~24 B/segment instead of ~176), with an ArrayList fallback for manifests this SDK did not write - materialize the aggregate hash once and share it with the root signature and every assertion instead of copying it per assertion Manifest JSON bytes are unchanged. The 0.manifest.json zip entry is now a streamed data-descriptor entry, the same form 0.payload already used. EOF
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Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe SDK adds compact manifest segment storage, streamed manifest I/O, integrity-algorithm validation, resource closure, and compatibility coverage. TDF encryption and loading use the updated manifest representation. ChangesManifest streaming and segment handling
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant TDF
participant Manifest
participant TDFWriter
participant ZipEntry
participant TDFReader
TDF->>Manifest: append and aggregate segment hashes
TDF->>TDFWriter: open manifest output stream
TDFWriter->>ZipEntry: write streamed UTF-8 manifest
TDF->>TDFReader: open manifest reader
TDFReader->>Manifest: readManifest(Reader)
Manifest-->>TDF: parsed manifest
Suggested reviewers: Merge Risk: ⚪ Minimal · up to No actionable merge-blocking risk remains. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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Actionable comments posted: 2
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Inline comments:
In `@sdk/src/main/java/io/opentdf/platform/sdk/Manifest.java`:
- Around line 185-186: Validate the first manifest hash’s stride against the
maximum safe chunk allocation before assigning it or entering the allocation
path in Manifest parsing. Reject oversized hashes before evaluating stride *
SEGMENTS_PER_CHUNK, while preserving normal chunk creation for valid strides and
the existing ArrayList fallback.
In `@sdk/src/main/java/io/opentdf/platform/sdk/TDFWriter.java`:
- Around line 30-31: Restore the public deprecated appendManifest(String) method
in TDFWriter as a compatibility wrapper, keeping its existing signature and
deprecation status. Implement it by delegating to manifest() while preserving
the current manifest-writing behavior and API compatibility.
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sdk/src/main/java/io/opentdf/platform/sdk/Manifest.javasdk/src/main/java/io/opentdf/platform/sdk/SDK.javasdk/src/main/java/io/opentdf/platform/sdk/TDF.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/SegmentsTest.javasdk/src/test/java/io/opentdf/platform/sdk/TDFWriterTest.java
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… and GMAC root signature rejection (DSPX-4703) Merge main into feat/dspx-4584-streaming-manifest. The only conflicting file was TDF.java, where both branches modified the same integrity-helper region. Resolution: - Keep PR's `calculateSignature` and `aggregateSegmentHashes`, which replace the old `segmentIntegrity`/`rootIntegrity`/`aeadTag` helpers. - Restore main's `requireSupportedRootIntegrityAlgorithm` and `requireSupportedSegmentIntegrityAlgorithm` guards (called up-front in createTDF) and `rootIntegrityAlgorithmFromManifest` (called in loadTDF) so GMAC is still rejected as a root algorithm (DSPX-4703). - Update TDFRootSignatureTest to call the surviving guard methods instead of the now-deleted `rootIntegrity`/`segmentIntegrity`. Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>
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The manifest was assembled entirely in memory on both paths, so a payload past ~21.7M segments (41 TiB at 2 MiB segments) hard-failed with OutOfMemoryError: Requested array size exceeds VM limit.
Manifest JSON bytes are unchanged. The 0.manifest.json zip entry is now a streamed data-descriptor entry, the same form 0.payload already used.
Summary by CodeRabbit
New Features
Breaking Changes
Compatibility