Persist notification big pictures encrypted

2026-07-23 10:23:49 +00:00
parent 9e917eacd3
commit 8570f65d09
3 changed files with 33 additions and 0 deletions
@@ -0,0 +1,19 @@
+package se.ajpanton.notificationlog.data
+
+import android.content.Context
+import java.io.File
+
+/** Stores copied notification image bytes independently of the source app's URI lifetime. */
+class EncryptedImageStore(context: Context) {
+    private val directory = File(context.filesDir, "notification-images").also(File::mkdirs)
+    private val cipher = AesGcmCipher(LogEncryptionKeyProvider().getOrCreate())
+
+    fun save(id: String, bytes: ByteArray) {
+        val payload = cipher.encrypt(bytes)
+        File(directory, "$id.bin").outputStream().use { output ->
+            output.write(payload.initializationVector.size)
+            output.write(payload.initializationVector)
+            output.write(payload.cipherText)
+        }
+    }
+}