add cipher migration for version 4 of sqlcipher

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

app/src/main/java/com/nextcloud/talk/application/NextcloudTalkApplication.kt

@@ -1,5 +1,4 @@
 /*
- *
  * Nextcloud Talk application
  *
  * @author Marcel Hibbe
@@ -51,6 +50,7 @@ import com.facebook.cache.disk.DiskCacheConfig
 import com.facebook.drawee.backends.pipeline.Fresco
 import com.facebook.imagepipeline.core.ImagePipelineConfig
 import com.nextcloud.talk.BuildConfig
+import com.nextcloud.talk.R
 import com.nextcloud.talk.components.filebrowser.webdav.DavUtils
 import com.nextcloud.talk.dagger.modules.BusModule
 import com.nextcloud.talk.dagger.modules.ContextModule
@@ -61,6 +61,7 @@ import com.nextcloud.talk.dagger.modules.ViewModelModule
 import com.nextcloud.talk.jobs.AccountRemovalWorker
 import com.nextcloud.talk.jobs.CapabilitiesWorker
 import com.nextcloud.talk.jobs.SignalingSettingsWorker
+import com.nextcloud.talk.models.database.Models
 import com.nextcloud.talk.utils.ClosedInterfaceImpl
 import com.nextcloud.talk.utils.DeviceUtils
 import com.nextcloud.talk.utils.DisplayUtils
@@ -74,12 +75,17 @@ import com.vanniktech.emoji.EmojiManager
 import com.vanniktech.emoji.google.GoogleEmojiProvider
 import de.cotech.hw.SecurityKeyManager
 import de.cotech.hw.SecurityKeyManagerConfig
+import io.requery.android.sqlcipher.SqlCipherDatabaseSource
+import net.sqlcipher.database.SQLiteDatabase
+import net.sqlcipher.database.SQLiteDatabaseHook
+import net.sqlcipher.database.SQLiteOpenHelper
 import okhttp3.OkHttpClient
 import org.conscrypt.Conscrypt
 import org.webrtc.PeerConnectionFactory
 import org.webrtc.voiceengine.WebRtcAudioManager
 import org.webrtc.voiceengine.WebRtcAudioUtils
 import java.security.Security
+import java.util.Locale
 import java.util.concurrent.TimeUnit
 import javax.inject.Inject
 import javax.inject.Singleton
@@ -113,6 +119,17 @@ class NextcloudTalkApplication : MultiDexApplication(), LifecycleObserver {
     lateinit var okHttpClient: OkHttpClient
     //endregion
 
+    val hook: SQLiteDatabaseHook = object : SQLiteDatabaseHook {
+        override fun preKey(database: SQLiteDatabase) {
+            // unused atm
+        }
+        override fun postKey(database: SQLiteDatabase) {
+            Log.i("TalkApplication", "DB cipher_migrate START")
+            database.rawExecSQL("PRAGMA cipher_migrate;")
+            Log.i("TalkApplication", "DB cipher_migrate END")
+        }
+    }
+
     //region private methods
     private fun initializeWebRtc() {
         try {
@@ -153,6 +170,8 @@ class NextcloudTalkApplication : MultiDexApplication(), LifecycleObserver {
 
         componentApplication.inject(this)
 
+        checkAndUpgradeDbCypher()
+
         Coil.setImageLoader(buildDefaultImageLoader())
         setAppTheme(appPreferences.theme)
         super.onCreate()
@@ -241,10 +260,48 @@ class NextcloudTalkApplication : MultiDexApplication(), LifecycleObserver {
             .build()
     }
 
+    private fun checkAndUpgradeDbCypher() {
+        if (appPreferences.isDbCypherToUpgrade) {
+            val database = object : SqlCipherDatabaseSource(
+                this,
+                Models.DEFAULT,
+                this.resources.getString(R.string.nc_app_product_name).lowercase(Locale.getDefault())
+                    .replace(" ", "_").trim { it <= ' ' } + ".sqlite",
+                this.getString(R.string.nc_talk_database_encryption_key),
+                DatabaseModule.DB_VERSION
+            ) {
+
+                override fun onUpgrade(db: SQLiteDatabase, oldVersion: Int, newVersion: Int) {
+                    checkAndUpdateCipherMigrationStatus(newVersion, appPreferences)
+                    super.onUpgrade(db, oldVersion, newVersion)
+                }
+            }
+
+            try {
+                val field = SQLiteOpenHelper::class.java.getDeclaredField("mHook")
+                field.isAccessible = true
+                field.set(database, hook)
+            } catch (e: NoSuchFieldException) {
+                Log.e("SqlCipherDatabaseSource", "Error accessing mHook field")
+            } catch (e: IllegalAccessException) {
+                Log.e("SqlCipherDatabaseSource", "Error setting mHook field")
+            }
+
+            checkAndUpdateCipherMigrationStatus(database.writableDatabase.version, appPreferences)
+        }
+    }
+
+    private fun checkAndUpdateCipherMigrationStatus(version: Int, appPreferences: AppPreferences) {
+        if (version >= CIPHER_V4_MIGRATION && appPreferences.isDbCypherToUpgrade) {
+            appPreferences.isDbCypherToUpgrade = false
+        }
+    }
+
     companion object {
         private val TAG = NextcloudTalkApplication::class.java.simpleName
         const val FIFTY_PERCENT = 0.5
         const val HALF_DAY: Long = 12
+        const val CIPHER_V4_MIGRATION: Int = 7
         //region Singleton
         //endregion
 

app/src/main/java/com/nextcloud/talk/dagger/modules/DatabaseModule.java

@@ -39,6 +39,7 @@ import javax.inject.Singleton;
 
 @Module
 public class DatabaseModule {
+    public static final int DB_VERSION = 7;
 
     @Provides
     @Singleton
@@ -46,7 +47,7 @@ public class DatabaseModule {
         return new SqlCipherDatabaseSource(context, Models.DEFAULT,
                 context.getResources().getString(R.string.nc_app_product_name).toLowerCase()
                         .replace(" ", "_").trim() + ".sqlite",
-                context.getString(R.string.nc_talk_database_encryption_key), 6);
+                context.getString(R.string.nc_talk_database_encryption_key), DB_VERSION);
     }
 
     @Provides

app/src/main/java/com/nextcloud/talk/utils/preferences/AppPreferences.java

@@ -282,6 +282,13 @@ public interface AppPreferences {
     @UnregisterChangeListenerMethod
     void unregisterThemeChangeListener(OnPreferenceValueChangedListener<String> listener);
 
+    @KeyByResource(R.string.nc_settings_db_cypher_v4_upgrade_key)
+    @DefaultValue(R.bool.value_true)
+    boolean getIsDbCypherToUpgrade();
+
+    @KeyByResource(R.string.nc_settings_db_cypher_v4_upgrade_key)
+    void setIsDbCypherToUpgrade(boolean value);
+    
     @KeyByResource(R.string.nc_settings_phone_book_integration_key)
     @RegisterChangeListenerMethod
     void registerPhoneBookIntegrationChangeListener(OnPreferenceValueChangedListener<Boolean> listener);

app/src/main/res/values/strings.xml

@@ -533,4 +533,6 @@
     <string name="send_without_notification">Send without notification</string>
     <string name="call_without_notification">Call without notification</string>
 
+    <string name="nc_settings_db_cypher_v4_upgrade_key" translatable="false">db_cypher_v4_upgrade</string>
+
 </resources>