verifier_tools: Add support for Tessera backed sharded logs. - #15
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cmd/verifier/verifier.go: - configured a new base URL and note verifier for Google APK Log v2. - refactored main with a logTarget chain so --log_type=google_1p_apk checks the latest Tessera shard (2026/02) first, and automatically falls back to the legacy 2026/01 shard if the candidate payload is not found. internal/checkpoint/checkpoint.go: - added new origin to `parseCheckpoint`. - added `FromURLWithPath` function to support standard Tessera checkpoint paths (checkpoint) alongside legacy paths (checkpoint.txt). - also added unit tests for Tessera logs. internal/tiles/reader.go: - extended `HashReader` with `IsTessera` flag to address Merkle tree hash tiles with standard tile/<L>/<N>[.p/<W>] paths (omitting tile height). - added `EntryTilePath` and `ParseEntryBundle` to decode big-endian uint16 length-prefixed entry bundles from `tile/entries/`. - implemented `TesseraFindPayloadIndex` with atomic disk caching to locate payload sequence indices across entry tiles. - also added unit tests for bundle parsing, tile paths, and index lookup. README.md: - updated the Google Product Application Transparency Log section to list both the legacy and new 2026/02 Tessera tile endpoints Change-Id: I8c75e2ad9ae9542e8c6e64ee81c395b7a12ffbb8
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cmd/verifier/verifier.go:
internal/checkpoint/checkpoint.go:
parseCheckpoint.FromURLWithPathfunction to support standard Tessera checkpoint paths (checkpoint) alongside legacy paths (checkpoint.txt).internal/tiles/reader.go:
HashReaderwithIsTesseraflag to address Merkle tree hash tiles with standard tile//[.p/] paths (omitting tile height).EntryTilePathandParseEntryBundleto decode big-endian uint16 length-prefixed entry bundles fromtile/entries/.TesseraFindPayloadIndexwith atomic disk caching to locate payload sequence indices across entry tiles.README.md:
Change-Id: I8c75e2ad9ae9542e8c6e64ee81c395b7a12ffbb8