Add key transparency backend support.

app/src/main/java/org/thoughtcrime/securesms/database/RecipientTable.kt

@@ -199,6 +199,7 @@ open class RecipientTable(context: Context, databaseHelper: SignalDatabase) : Da
     const val SORT_NAME = "sort_name"
     const val IDENTITY_STATUS = "identity_status"
     const val IDENTITY_KEY = "identity_key"
+    const val KEY_TRANSPARENCY_DATA = "key_transparency_data"
 
     @JvmField
     val CREATE_TABLE =
@@ -267,7 +268,8 @@ open class RecipientTable(context: Context, databaseHelper: SignalDatabase) : Da
         $NICKNAME_FAMILY_NAME TEXT DEFAULT NULL,
         $NICKNAME_JOINED_NAME TEXT DEFAULT NULL,
         $NOTE TEXT DEFAULT NULL,
-        $MESSAGE_EXPIRATION_TIME_VERSION INTEGER DEFAULT 1 NOT NULL
+        $MESSAGE_EXPIRATION_TIME_VERSION INTEGER DEFAULT 1 NOT NULL,
+        $KEY_TRANSPARENCY_DATA BLOB DEFAULT NULL
       )
       """
 
@@ -331,7 +333,8 @@ open class RecipientTable(context: Context, databaseHelper: SignalDatabase) : Da
       PHONE_NUMBER_SHARING,
       NICKNAME_GIVEN_NAME,
       NICKNAME_FAMILY_NAME,
-      NOTE
+      NOTE,
+      KEY_TRANSPARENCY_DATA
     )
 
     private val ID_PROJECTION = arrayOf(ID)
@@ -4026,6 +4029,25 @@ open class RecipientTable(context: Context, databaseHelper: SignalDatabase) : Da
       .readToSingleLong(0L)
   }
 
+  fun getKeyTransparencyData(aci: ACI): ByteArray? {
+    return readableDatabase
+      .select(KEY_TRANSPARENCY_DATA)
+      .from(TABLE_NAME)
+      .where("$ACI_COLUMN = ?", aci.toString())
+      .run()
+      .readToSingleObject { cursor ->
+        cursor.requireBlob(KEY_TRANSPARENCY_DATA)
+      }
+  }
+
+  fun setKeyTransparencyData(aci: ACI, data: ByteArray?) {
+    writableDatabase
+      .update(TABLE_NAME)
+      .values(KEY_TRANSPARENCY_DATA to data)
+      .where("$ACI_COLUMN = ?", aci.toString())
+      .run()
+  }
+
   /**
    * Will update the database with the content values you specified. It will make an intelligent
    * query such that this will only return true if a row was *actually* updated.

app/src/main/java/org/thoughtcrime/securesms/database/RecipientTableCursorUtil.kt

@@ -165,7 +165,8 @@ object RecipientTableCursorUtil {
       callLinkRoomId = cursor.requireString(RecipientTable.CALL_LINK_ROOM_ID)?.let { CallLinkRoomId.DatabaseSerializer.deserialize(it) },
       phoneNumberSharing = cursor.requireInt(RecipientTable.PHONE_NUMBER_SHARING).let { RecipientTable.PhoneNumberSharingState.fromId(it) },
       nickname = ProfileName.fromParts(cursor.requireString(RecipientTable.NICKNAME_GIVEN_NAME), cursor.requireString(RecipientTable.NICKNAME_FAMILY_NAME)),
-      note = cursor.requireString(RecipientTable.NOTE)
+      note = cursor.requireString(RecipientTable.NOTE),
+      keyTransparencyData = cursor.requireBlob(RecipientTable.KEY_TRANSPARENCY_DATA)
     )
   }
 

app/src/main/java/org/thoughtcrime/securesms/database/helpers/SignalDatabaseMigrations.kt

@@ -153,6 +153,7 @@ import org.thoughtcrime.securesms.database.helpers.migration.V296_RemovePollVote
 import org.thoughtcrime.securesms.database.helpers.migration.V297_AddPinnedMessageColumns
 import org.thoughtcrime.securesms.database.helpers.migration.V298_DoNotBackupReleaseNotes
 import org.thoughtcrime.securesms.database.helpers.migration.V299_AddAttachmentMetadataTable
+import org.thoughtcrime.securesms.database.helpers.migration.V300_AddKeyTransparencyColumn
 import org.thoughtcrime.securesms.database.SQLiteDatabase as SignalSqliteDatabase
 
 /**
@@ -312,10 +313,11 @@ object SignalDatabaseMigrations {
     296 to V296_RemovePollVoteConstraint,
     297 to V297_AddPinnedMessageColumns,
     298 to V298_DoNotBackupReleaseNotes,
-    299 to V299_AddAttachmentMetadataTable
+    299 to V299_AddAttachmentMetadataTable,
+    300 to V300_AddKeyTransparencyColumn
   )
 
-  const val DATABASE_VERSION = 299
+  const val DATABASE_VERSION = 300
 
   @JvmStatic
   fun migrate(context: Application, db: SignalSqliteDatabase, oldVersion: Int, newVersion: Int) {

app/src/main/java/org/thoughtcrime/securesms/database/helpers/migration/V300_AddKeyTransparencyColumn.kt

@@ -0,0 +1,15 @@
+package org.thoughtcrime.securesms.database.helpers.migration
+
+import android.app.Application
+import org.thoughtcrime.securesms.database.SQLiteDatabase
+
+/**
+ * Adds column to recipient to track key transparency data
+ */
+@Suppress("ClassName")
+object V300_AddKeyTransparencyColumn : SignalDatabaseMigration {
+
+  override fun migrate(context: Application, db: SQLiteDatabase, oldVersion: Int, newVersion: Int) {
+    db.execSQL("ALTER TABLE recipient ADD COLUMN key_transparency_data BLOB DEFAULT NULL")
+  }
+}

app/src/main/java/org/thoughtcrime/securesms/database/model/KeyTransparencyStore.kt

@@ -0,0 +1,34 @@
+package org.thoughtcrime.securesms.database.model
+
+import org.signal.core.util.logging.Log.tag
+import org.signal.libsignal.keytrans.Store
+import org.signal.libsignal.protocol.ServiceId
+import org.thoughtcrime.securesms.database.SignalDatabase
+import org.thoughtcrime.securesms.keyvalue.SignalStore
+import java.util.Optional
+
+/**
+ * Store used by [org.signal.libsignal.net.KeyTransparencyClient] during key transparency
+ */
+data object KeyTransparencyStore : Store {
+
+  private val TAG: String = tag(KeyTransparencyStore::class.java)
+
+  override fun getLastDistinguishedTreeHead(): Optional<ByteArray> {
+    return Optional.ofNullable(SignalStore.account.distinguishedHead)
+  }
+
+  override fun setLastDistinguishedTreeHead(lastDistinguishedTreeHead: ByteArray) {
+    SignalStore.account.distinguishedHead = lastDistinguishedTreeHead
+  }
+
+  override fun getAccountData(libsignalAci: ServiceId.Aci): Optional<ByteArray> {
+    val aci = org.signal.core.models.ServiceId.ACI.fromLibSignal(libsignalAci)
+    return Optional.ofNullable(SignalDatabase.recipients.getKeyTransparencyData(aci))
+  }
+
+  override fun setAccountData(libsignalAci: ServiceId.Aci, data: ByteArray) {
+    val aci = org.signal.core.models.ServiceId.ACI.fromLibSignal(libsignalAci)
+    SignalDatabase.recipients.setKeyTransparencyData(aci, data)
+  }
+}

app/src/main/java/org/thoughtcrime/securesms/database/model/RecipientRecord.kt

@@ -81,7 +81,8 @@ data class RecipientRecord(
   val callLinkRoomId: CallLinkRoomId?,
   val phoneNumberSharing: PhoneNumberSharingState,
   val nickname: ProfileName,
-  val note: String?
+  val note: String?,
+  val keyTransparencyData: ByteArray? = null
 ) {
 
   fun e164Only(): Boolean {