[WIP] Implement Play Integrity attestation and expand proof companion…#790
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prathieshna merged 2 commits intoJul 12, 2026
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… file generation.
Specific changes:
**Proof Generation & Metadata:**
- Expanded `ProofCompanionGenerator` to generate `.csv` proof files and corresponding PGP signatures (`.csv.asc`) alongside existing JSON proofs.
- Added a dynamically generated `HowToVerifyProofData.txt` to the proof bundle with instructions for manual GPG, OpenTimestamps, and Play Integrity verification.
- Refactored metadata extraction into `buildProofFields` to include richer device and network information (e.g., Brand, Model, Network Type, IPv4/IPv6, CellInfo) directly from `CaptureMetadata`.
- Updated `CameraViewModel` to pass live capture metadata to the proof generator, ensuring sensor and device fields are preserved without relying solely on EXIF.
**Google Play Integrity (GST):**
- Introduced `SafetyNetHelper` with flavor-specific implementations:
- **GMS:** Requests a Play Integrity token (GST) using a nonce derived from the media hash and saves it to a `.gst` file.
- **FOSS:** Provides a no-op stub for environments without Google Mobile Services.
- Added `com.google.android.play:integrity` dependency to the GMS build configuration.
**Networking & Utilities:**
- Updated OpenTimestamps (OTS) submission to use `application/octet-stream` for raw hash uploads.
- Implemented CSV escaping logic to handle special characters and line breaks in metadata fields.
- Included the new `.csv`, `.gst`, and instruction files in the list of companions prepared for upload.
![github-advanced-security[bot]](https://avatars.githubusercontent.com/in/57789?s=60&v=4){kind=small}
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prathieshna
merged commit 7e51a3c
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temp/next-prod-release-8th-june-2026
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… file generation.
Specific changes:
Proof Generation & Metadata:
ProofCompanionGeneratorto generate.csvproof files and corresponding PGP signatures (.csv.asc) alongside existing JSON proofs.HowToVerifyProofData.txtto the proof bundle with instructions for manual GPG, OpenTimestamps, and Play Integrity verification.buildProofFieldsto include richer device and network information (e.g., Brand, Model, Network Type, IPv4/IPv6, CellInfo) directly fromCaptureMetadata.CameraViewModelto pass live capture metadata to the proof generator, ensuring sensor and device fields are preserved without relying solely on EXIF.Google Play Integrity (GST):
SafetyNetHelperwith flavor-specific implementations:.gstfile.com.google.android.play:integritydependency to the GMS build configuration.Networking & Utilities:
application/octet-streamfor raw hash uploads..csv,.gst, and instruction files in the list of companions prepared for upload.