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[WIP] Implement Play Integrity attestation and expand proof companion… #790

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Merged
prathieshna merged 2 commits into from
Jul 12, 2026
Merged

[WIP] Implement Play Integrity attestation and expand proof companion… #790

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bbd2a4a
[WIP] Implement Play Integrity attestation and expand proof companion…
Jun 23, 2026
d783fbc
Added OTS digest generation
Jul 12, 2026
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1 change: 1 addition & 0 deletions app/build.gradle.kts
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Original file line number Diff line number Diff line change
Expand Up @@ -310,6 +310,7 @@ dependencies {
"gmsImplementation"(libs.google.play.review.ktx)
"gmsImplementation"(libs.google.play.app.update.ktx)
"gmsImplementation"("com.google.android.gms:play-services-location:21.1.0")
"gmsImplementation"("com.google.android.play:integrity:1.4.0")

// Tor
implementation(libs.tor.android)
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9 changes: 9 additions & 0 deletions app/src/foss/java/net/opendasharchive/openarchive/util/SafetyNetHelper.kt
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@@ -0,0 +1,9 @@
package net.opendasharchive.openarchive.util

import android.content.Context
import java.io.File

object SafetyNetHelper {
// Play Integrity API requires GMS — not available on FOSS builds.
fun requestGst(context: Context, mediaHash: String, outFile: File) = Unit

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Function parameter is unused and should be removed. Warning

Function parameter context is unused.

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Function parameter is unused and should be removed. Warning

Function parameter mediaHash is unused.

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Function parameter is unused and should be removed. Warning

Function parameter outFile is unused.
}
30 changes: 30 additions & 0 deletions app/src/gms/java/net/opendasharchive/openarchive/util/SafetyNetHelper.kt
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@@ -0,0 +1,30 @@
package net.opendasharchive.openarchive.util

import android.content.Context

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Detects imports in non default order Warning

Imports must be ordered in lexicographic order without any empty lines in-between with "java", "javax", "kotlin" and aliases in the end
import android.util.Base64
import com.google.android.play.core.integrity.IntegrityManagerFactory
import com.google.android.play.core.integrity.IntegrityTokenRequest
import com.google.android.gms.tasks.Tasks
import net.opendasharchive.openarchive.core.logger.AppLogger
import java.io.File

object SafetyNetHelper {
/**
* Requests a Play Integrity token and writes it as a JWT string to [outFile].
* No-op on network or API failure — outFile simply won't exist, and the caller
* skips it in the upload list.
*/
fun requestGst(context: Context, mediaHash: String, outFile: File) {
try {
val nonce = Base64.encodeToString(mediaHash.toByteArray(Charsets.UTF_8),

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Reports incorrect argument list wrapping Warning

Argument should be on a separate line (unless all arguments can fit a single line)

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Reports missing newlines (e.g. between parentheses of a multi-line function call Warning

Missing newline after "("
Base64.URL_SAFE or Base64.NO_WRAP)

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val manager = IntegrityManagerFactory.create(context.applicationContext)
val request = IntegrityTokenRequest.builder().setNonce(nonce).build()
val response = Tasks.await(manager.requestIntegrityToken(request))
outFile.writeText(response.token())
AppLogger.i("[GST] Play Integrity token written for $mediaHash")
} catch (e: Exception) {

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The caught exception is too generic. Prefer catching specific exceptions to the case that is currently handled. Warning

The caught exception is too generic. Prefer catching specific exceptions to the case that is currently handled.
AppLogger.w("[GST] Play Integrity request failed: ${e.message}")
}
}
}
4 changes: 2 additions & 2 deletions app/src/main/java/net/opendasharchive/openarchive/features/media/camera/CameraViewModel.kt
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Expand Up @@ -259,7 +259,7 @@ class CameraViewModel : ViewModel() {
if (signedFile != null) {
AppLogger.d("[C2PA] Proof embedded: ${signedFile.name}")
val hash = computeFileHash(signedFile)
if (hash.isNotEmpty()) ProofCompanionGenerator.generateLocalProof(context, signedFile, hash)
if (hash.isNotEmpty()) ProofCompanionGenerator.generateLocalProof(context, signedFile, hash, metadata)
} else {
AppLogger.w("[C2PA] Proof embedding skipped/failed for ${file.name}")
}
Expand All @@ -279,7 +279,7 @@ class CameraViewModel : ViewModel() {
if (signedFile != null) {
AppLogger.d("[C2PA] Proof embedded: ${signedFile.name}")
val hash = computeFileHash(signedFile)
if (hash.isNotEmpty()) ProofCompanionGenerator.generateLocalProof(context, signedFile, hash)
if (hash.isNotEmpty()) ProofCompanionGenerator.generateLocalProof(context, signedFile, hash, metadata)
} else {
AppLogger.w("[C2PA] Proof embedding skipped/failed for ${file.name}")
}
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