DatabaseBackend.java

   1package eu.siacs.conversations.persistance;
   2
   3import android.content.ContentValues;
   4import android.content.Context;
   5import android.database.Cursor;
   6import android.database.DatabaseUtils;
   7import android.database.sqlite.SQLiteDatabase;
   8import android.database.sqlite.SQLiteOpenHelper;
   9import android.os.Environment;
  10import android.os.SystemClock;
  11import android.util.Base64;
  12import android.util.Log;
  13
  14import com.cheogram.android.WebxdcUpdate;
  15
  16import com.google.common.base.Stopwatch;
  17
  18import org.json.JSONException;
  19import org.json.JSONObject;
  20import org.whispersystems.libsignal.IdentityKey;
  21import org.whispersystems.libsignal.IdentityKeyPair;
  22import org.whispersystems.libsignal.InvalidKeyException;
  23import org.whispersystems.libsignal.SignalProtocolAddress;
  24import org.whispersystems.libsignal.state.PreKeyRecord;
  25import org.whispersystems.libsignal.state.SessionRecord;
  26import org.whispersystems.libsignal.state.SignedPreKeyRecord;
  27
  28import java.io.ByteArrayInputStream;
  29import java.io.File;
  30import java.io.IOException;
  31import java.security.cert.CertificateEncodingException;
  32import java.security.cert.CertificateException;
  33import java.security.cert.CertificateFactory;
  34import java.security.cert.X509Certificate;
  35import java.util.ArrayList;
  36import java.util.HashMap;
  37import java.util.HashSet;
  38import java.util.List;
  39import java.util.Map;
  40import java.util.Set;
  41import java.util.UUID;
  42import java.util.concurrent.CopyOnWriteArrayList;
  43
  44import io.ipfs.cid.Cid;
  45
  46import eu.siacs.conversations.Config;
  47import eu.siacs.conversations.crypto.axolotl.AxolotlService;
  48import eu.siacs.conversations.crypto.axolotl.FingerprintStatus;
  49import eu.siacs.conversations.crypto.axolotl.SQLiteAxolotlStore;
  50import eu.siacs.conversations.entities.Account;
  51import eu.siacs.conversations.entities.Contact;
  52import eu.siacs.conversations.entities.Conversation;
  53import eu.siacs.conversations.entities.DownloadableFile;
  54import eu.siacs.conversations.entities.Message;
  55import eu.siacs.conversations.entities.PresenceTemplate;
  56import eu.siacs.conversations.entities.Roster;
  57import eu.siacs.conversations.entities.ServiceDiscoveryResult;
  58import eu.siacs.conversations.services.QuickConversationsService;
  59import eu.siacs.conversations.services.ShortcutService;
  60import eu.siacs.conversations.utils.CryptoHelper;
  61import eu.siacs.conversations.utils.CursorUtils;
  62import eu.siacs.conversations.utils.FtsUtils;
  63import eu.siacs.conversations.utils.MimeUtils;
  64import eu.siacs.conversations.utils.Resolver;
  65import eu.siacs.conversations.xmpp.InvalidJid;
  66import eu.siacs.conversations.xmpp.Jid;
  67import eu.siacs.conversations.xmpp.mam.MamReference;
  68
  69public class DatabaseBackend extends SQLiteOpenHelper {
  70
  71    private static final String DATABASE_NAME = "history";
  72    private static final int DATABASE_VERSION = 51;
  73
  74    private static boolean requiresMessageIndexRebuild = false;
  75    private static DatabaseBackend instance = null;
  76    private static final String CREATE_CONTATCS_STATEMENT = "create table "
  77            + Contact.TABLENAME + "(" + Contact.ACCOUNT + " TEXT, "
  78            + Contact.SERVERNAME + " TEXT, " + Contact.SYSTEMNAME + " TEXT,"
  79            + Contact.PRESENCE_NAME + " TEXT,"
  80            + Contact.JID + " TEXT," + Contact.KEYS + " TEXT,"
  81            + Contact.PHOTOURI + " TEXT," + Contact.OPTIONS + " NUMBER,"
  82            + Contact.SYSTEMACCOUNT + " NUMBER, " + Contact.AVATAR + " TEXT, "
  83            + Contact.LAST_PRESENCE + " TEXT, " + Contact.LAST_TIME + " NUMBER, "
  84            + Contact.RTP_CAPABILITY + " TEXT,"
  85            + Contact.GROUPS + " TEXT, FOREIGN KEY(" + Contact.ACCOUNT + ") REFERENCES "
  86            + Account.TABLENAME + "(" + Account.UUID
  87            + ") ON DELETE CASCADE, UNIQUE(" + Contact.ACCOUNT + ", "
  88            + Contact.JID + ") ON CONFLICT REPLACE);";
  89
  90    private static final String CREATE_DISCOVERY_RESULTS_STATEMENT = "create table "
  91            + ServiceDiscoveryResult.TABLENAME + "("
  92            + ServiceDiscoveryResult.HASH + " TEXT, "
  93            + ServiceDiscoveryResult.VER + " TEXT, "
  94            + ServiceDiscoveryResult.RESULT + " TEXT, "
  95            + "UNIQUE(" + ServiceDiscoveryResult.HASH + ", "
  96            + ServiceDiscoveryResult.VER + ") ON CONFLICT REPLACE);";
  97
  98    private static final String CREATE_PRESENCE_TEMPLATES_STATEMENT = "CREATE TABLE "
  99            + PresenceTemplate.TABELNAME + "("
 100            + PresenceTemplate.UUID + " TEXT, "
 101            + PresenceTemplate.LAST_USED + " NUMBER,"
 102            + PresenceTemplate.MESSAGE + " TEXT,"
 103            + PresenceTemplate.STATUS + " TEXT,"
 104            + "UNIQUE(" + PresenceTemplate.MESSAGE + "," + PresenceTemplate.STATUS + ") ON CONFLICT REPLACE);";
 105
 106    private static final String CREATE_PREKEYS_STATEMENT = "CREATE TABLE "
 107            + SQLiteAxolotlStore.PREKEY_TABLENAME + "("
 108            + SQLiteAxolotlStore.ACCOUNT + " TEXT,  "
 109            + SQLiteAxolotlStore.ID + " INTEGER, "
 110            + SQLiteAxolotlStore.KEY + " TEXT, FOREIGN KEY("
 111            + SQLiteAxolotlStore.ACCOUNT
 112            + ") REFERENCES " + Account.TABLENAME + "(" + Account.UUID + ") ON DELETE CASCADE, "
 113            + "UNIQUE( " + SQLiteAxolotlStore.ACCOUNT + ", "
 114            + SQLiteAxolotlStore.ID
 115            + ") ON CONFLICT REPLACE"
 116            + ");";
 117
 118    private static final String CREATE_SIGNED_PREKEYS_STATEMENT = "CREATE TABLE "
 119            + SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME + "("
 120            + SQLiteAxolotlStore.ACCOUNT + " TEXT,  "
 121            + SQLiteAxolotlStore.ID + " INTEGER, "
 122            + SQLiteAxolotlStore.KEY + " TEXT, FOREIGN KEY("
 123            + SQLiteAxolotlStore.ACCOUNT
 124            + ") REFERENCES " + Account.TABLENAME + "(" + Account.UUID + ") ON DELETE CASCADE, "
 125            + "UNIQUE( " + SQLiteAxolotlStore.ACCOUNT + ", "
 126            + SQLiteAxolotlStore.ID
 127            + ") ON CONFLICT REPLACE" +
 128            ");";
 129
 130    private static final String CREATE_SESSIONS_STATEMENT = "CREATE TABLE "
 131            + SQLiteAxolotlStore.SESSION_TABLENAME + "("
 132            + SQLiteAxolotlStore.ACCOUNT + " TEXT,  "
 133            + SQLiteAxolotlStore.NAME + " TEXT, "
 134            + SQLiteAxolotlStore.DEVICE_ID + " INTEGER, "
 135            + SQLiteAxolotlStore.KEY + " TEXT, FOREIGN KEY("
 136            + SQLiteAxolotlStore.ACCOUNT
 137            + ") REFERENCES " + Account.TABLENAME + "(" + Account.UUID + ") ON DELETE CASCADE, "
 138            + "UNIQUE( " + SQLiteAxolotlStore.ACCOUNT + ", "
 139            + SQLiteAxolotlStore.NAME + ", "
 140            + SQLiteAxolotlStore.DEVICE_ID
 141            + ") ON CONFLICT REPLACE"
 142            + ");";
 143
 144    private static final String CREATE_IDENTITIES_STATEMENT = "CREATE TABLE "
 145            + SQLiteAxolotlStore.IDENTITIES_TABLENAME + "("
 146            + SQLiteAxolotlStore.ACCOUNT + " TEXT,  "
 147            + SQLiteAxolotlStore.NAME + " TEXT, "
 148            + SQLiteAxolotlStore.OWN + " INTEGER, "
 149            + SQLiteAxolotlStore.FINGERPRINT + " TEXT, "
 150            + SQLiteAxolotlStore.CERTIFICATE + " BLOB, "
 151            + SQLiteAxolotlStore.TRUST + " TEXT, "
 152            + SQLiteAxolotlStore.ACTIVE + " NUMBER, "
 153            + SQLiteAxolotlStore.LAST_ACTIVATION + " NUMBER,"
 154            + SQLiteAxolotlStore.KEY + " TEXT, FOREIGN KEY("
 155            + SQLiteAxolotlStore.ACCOUNT
 156            + ") REFERENCES " + Account.TABLENAME + "(" + Account.UUID + ") ON DELETE CASCADE, "
 157            + "UNIQUE( " + SQLiteAxolotlStore.ACCOUNT + ", "
 158            + SQLiteAxolotlStore.NAME + ", "
 159            + SQLiteAxolotlStore.FINGERPRINT
 160            + ") ON CONFLICT IGNORE"
 161            + ");";
 162
 163    private static final String RESOLVER_RESULTS_TABLENAME = "resolver_results";
 164
 165    private static final String CREATE_RESOLVER_RESULTS_TABLE = "create table " + RESOLVER_RESULTS_TABLENAME + "("
 166            + Resolver.Result.DOMAIN + " TEXT,"
 167            + Resolver.Result.HOSTNAME + " TEXT,"
 168            + Resolver.Result.IP + " BLOB,"
 169            + Resolver.Result.PRIORITY + " NUMBER,"
 170            + Resolver.Result.DIRECT_TLS + " NUMBER,"
 171            + Resolver.Result.AUTHENTICATED + " NUMBER,"
 172            + Resolver.Result.PORT + " NUMBER,"
 173            + "UNIQUE(" + Resolver.Result.DOMAIN + ") ON CONFLICT REPLACE"
 174            + ");";
 175
 176    private static final String CREATE_MESSAGE_TIME_INDEX = "CREATE INDEX message_time_index ON " + Message.TABLENAME + "(" + Message.TIME_SENT + ")";
 177    private static final String CREATE_MESSAGE_CONVERSATION_INDEX = "CREATE INDEX message_conversation_index ON " + Message.TABLENAME + "(" + Message.CONVERSATION + ")";
 178    private static final String CREATE_MESSAGE_DELETED_INDEX = "CREATE INDEX message_deleted_index ON " + Message.TABLENAME + "(" + Message.DELETED + ")";
 179    private static final String CREATE_MESSAGE_RELATIVE_FILE_PATH_INDEX = "CREATE INDEX message_file_path_index ON " + Message.TABLENAME + "(" + Message.RELATIVE_FILE_PATH + ")";
 180    private static final String CREATE_MESSAGE_TYPE_INDEX = "CREATE INDEX message_type_index ON " + Message.TABLENAME + "(" + Message.TYPE + ")";
 181
 182    private static final String CREATE_MESSAGE_INDEX_TABLE = "CREATE VIRTUAL TABLE messages_index USING fts4 (uuid,body,notindexed=\"uuid\",content=\"" + Message.TABLENAME + "\",tokenize='unicode61')";
 183    private static final String CREATE_MESSAGE_INSERT_TRIGGER = "CREATE TRIGGER after_message_insert AFTER INSERT ON " + Message.TABLENAME + " BEGIN INSERT INTO messages_index(rowid,uuid,body) VALUES(NEW.rowid,NEW.uuid,NEW.body); END;";
 184    private static final String CREATE_MESSAGE_UPDATE_TRIGGER = "CREATE TRIGGER after_message_update UPDATE OF uuid,body ON " + Message.TABLENAME + " BEGIN UPDATE messages_index SET body=NEW.body,uuid=NEW.uuid WHERE rowid=OLD.rowid; END;";
 185    private static final String CREATE_MESSAGE_DELETE_TRIGGER = "CREATE TRIGGER after_message_delete AFTER DELETE ON " + Message.TABLENAME + " BEGIN DELETE FROM messages_index WHERE rowid=OLD.rowid; END;";
 186    private static final String COPY_PREEXISTING_ENTRIES = "INSERT INTO messages_index(messages_index) VALUES('rebuild');";
 187
 188    protected Context context;
 189
 190    private DatabaseBackend(Context context) {
 191        super(context, DATABASE_NAME, null, DATABASE_VERSION);
 192        this.context = context;
 193    }
 194
 195    private static ContentValues createFingerprintStatusContentValues(FingerprintStatus.Trust trust, boolean active) {
 196        ContentValues values = new ContentValues();
 197        values.put(SQLiteAxolotlStore.TRUST, trust.toString());
 198        values.put(SQLiteAxolotlStore.ACTIVE, active ? 1 : 0);
 199        return values;
 200    }
 201
 202    public static boolean requiresMessageIndexRebuild() {
 203        return requiresMessageIndexRebuild;
 204    }
 205
 206    public void rebuildMessagesIndex() {
 207        final SQLiteDatabase db = getWritableDatabase();
 208        final Stopwatch stopwatch = Stopwatch.createStarted();
 209        db.execSQL(COPY_PREEXISTING_ENTRIES);
 210        Log.d(Config.LOGTAG,"rebuilt message index in "+ stopwatch.stop().toString());
 211    }
 212
 213    public static synchronized DatabaseBackend getInstance(Context context) {
 214        if (instance == null) {
 215            instance = new DatabaseBackend(context);
 216        }
 217        return instance;
 218    }
 219
 220    protected void cheogramMigrate(SQLiteDatabase db) {
 221        db.beginTransaction();
 222
 223        try {
 224            Cursor cursor = db.rawQuery("PRAGMA cheogram.user_version", null);
 225            cursor.moveToNext();
 226            int cheogramVersion = cursor.getInt(0);
 227            cursor.close();
 228
 229            if(cheogramVersion < 1) {
 230                // No cross-DB foreign keys unfortunately
 231                db.execSQL(
 232                    "CREATE TABLE cheogram." + Message.TABLENAME + "(" +
 233                    Message.UUID + " TEXT PRIMARY KEY, " +
 234                    "subject TEXT" +
 235                    ")"
 236                );
 237                db.execSQL("PRAGMA cheogram.user_version = 1");
 238            }
 239
 240            if(cheogramVersion < 2) {
 241                db.execSQL(
 242                    "ALTER TABLE cheogram." + Message.TABLENAME + " " +
 243                    "ADD COLUMN oobUri TEXT"
 244                );
 245                db.execSQL(
 246                    "ALTER TABLE cheogram." + Message.TABLENAME + " " +
 247                    "ADD COLUMN fileParams TEXT"
 248                );
 249                db.execSQL("PRAGMA cheogram.user_version = 2");
 250            }
 251
 252            if(cheogramVersion < 3) {
 253                db.execSQL(
 254                    "ALTER TABLE cheogram." + Message.TABLENAME + " " +
 255                    "ADD COLUMN payloads TEXT"
 256                );
 257                db.execSQL("PRAGMA cheogram.user_version = 3");
 258            }
 259
 260            if(cheogramVersion < 4) {
 261                db.execSQL(
 262                    "CREATE TABLE cheogram.cids (" +
 263                    "cid TEXT NOT NULL PRIMARY KEY," +
 264                    "path TEXT NOT NULL" +
 265                    ")"
 266                );
 267                db.execSQL("PRAGMA cheogram.user_version = 4");
 268            }
 269
 270            if(cheogramVersion < 5) {
 271                db.execSQL(
 272                    "ALTER TABLE cheogram." + Message.TABLENAME + " " +
 273                    "ADD COLUMN timeReceived NUMBER"
 274                );
 275                db.execSQL("CREATE INDEX cheogram.message_time_received_index ON " + Message.TABLENAME + " (timeReceived)");
 276                db.execSQL("PRAGMA cheogram.user_version = 5");
 277            }
 278
 279            if(cheogramVersion < 6) {
 280                db.execSQL(
 281                    "CREATE TABLE cheogram.blocked_media (" +
 282                    "cid TEXT NOT NULL PRIMARY KEY" +
 283                    ")"
 284                );
 285                db.execSQL("PRAGMA cheogram.user_version = 6");
 286            }
 287
 288            if(cheogramVersion < 7) {
 289                db.execSQL(
 290                    "ALTER TABLE cheogram.cids " +
 291                    "ADD COLUMN url TEXT"
 292                );
 293                db.execSQL("PRAGMA cheogram.user_version = 7");
 294            }
 295
 296            if(cheogramVersion < 8) {
 297                db.execSQL(
 298                    "CREATE TABLE cheogram.webxdc_updates (" +
 299                    "serial INTEGER PRIMARY KEY AUTOINCREMENT, " +
 300                    Message.CONVERSATION + " TEXT NOT NULL, " +
 301                    "sender TEXT NOT NULL, " +
 302                    "thread TEXT NOT NULL, " +
 303                    "threadParent TEXT, " +
 304                    "info TEXT, " +
 305                    "document TEXT, " +
 306                    "summary TEXT, " +
 307                    "payload TEXT" +
 308                    ")"
 309                );
 310                db.execSQL("CREATE INDEX cheogram.webxdc_index ON webxdc_updates (" + Message.CONVERSATION + ", thread)");
 311                db.execSQL("PRAGMA cheogram.user_version = 8");
 312				}
 313
 314            if(cheogramVersion < 9) {
 315                db.execSQL(
 316                    "ALTER TABLE cheogram.webxdc_updates " +
 317                    "ADD COLUMN message_id TEXT"
 318                );
 319                db.execSQL("CREATE UNIQUE INDEX cheogram.webxdc_message_id_index ON webxdc_updates (" + Message.CONVERSATION + ", message_id)");
 320                db.execSQL("PRAGMA cheogram.user_version = 9");
 321            }
 322
 323            db.setTransactionSuccessful();
 324        } finally {
 325            db.endTransaction();
 326        }
 327    }
 328
 329    @Override
 330    public void onConfigure(SQLiteDatabase db) {
 331        db.execSQL("PRAGMA foreign_keys=ON");
 332        db.rawQuery("PRAGMA secure_delete=ON", null).close();
 333        db.execSQL("ATTACH DATABASE ? AS cheogram", new Object[]{context.getDatabasePath("cheogram").getPath()});
 334        cheogramMigrate(db);
 335    }
 336
 337    @Override
 338    public void onCreate(SQLiteDatabase db) {
 339        db.execSQL("create table " + Account.TABLENAME + "(" + Account.UUID + " TEXT PRIMARY KEY,"
 340                + Account.USERNAME + " TEXT,"
 341                + Account.SERVER + " TEXT,"
 342                + Account.PASSWORD + " TEXT,"
 343                + Account.DISPLAY_NAME + " TEXT, "
 344                + Account.STATUS + " TEXT,"
 345                + Account.STATUS_MESSAGE + " TEXT,"
 346                + Account.ROSTERVERSION + " TEXT,"
 347                + Account.OPTIONS + " NUMBER, "
 348                + Account.AVATAR + " TEXT, "
 349                + Account.KEYS + " TEXT, "
 350                + Account.HOSTNAME + " TEXT, "
 351                + Account.RESOURCE + " TEXT,"
 352                + Account.PINNED_MECHANISM + " TEXT,"
 353                + Account.PINNED_CHANNEL_BINDING + " TEXT,"
 354                + Account.FAST_MECHANISM + " TEXT,"
 355                + Account.FAST_TOKEN + " TEXT,"
 356                + Account.PORT + " NUMBER DEFAULT 5222)");
 357        db.execSQL("create table " + Conversation.TABLENAME + " ("
 358                + Conversation.UUID + " TEXT PRIMARY KEY, " + Conversation.NAME
 359                + " TEXT, " + Conversation.CONTACT + " TEXT, "
 360                + Conversation.ACCOUNT + " TEXT, " + Conversation.CONTACTJID
 361                + " TEXT, " + Conversation.CREATED + " NUMBER, "
 362                + Conversation.STATUS + " NUMBER, " + Conversation.MODE
 363                + " NUMBER, " + Conversation.ATTRIBUTES + " TEXT, FOREIGN KEY("
 364                + Conversation.ACCOUNT + ") REFERENCES " + Account.TABLENAME
 365                + "(" + Account.UUID + ") ON DELETE CASCADE);");
 366        db.execSQL("create table " + Message.TABLENAME + "( " + Message.UUID
 367                + " TEXT PRIMARY KEY, " + Message.CONVERSATION + " TEXT, "
 368                + Message.TIME_SENT + " NUMBER, " + Message.COUNTERPART
 369                + " TEXT, " + Message.TRUE_COUNTERPART + " TEXT,"
 370                + Message.BODY + " TEXT, " + Message.ENCRYPTION + " NUMBER, "
 371                + Message.STATUS + " NUMBER," + Message.TYPE + " NUMBER, "
 372                + Message.RELATIVE_FILE_PATH + " TEXT, "
 373                + Message.SERVER_MSG_ID + " TEXT, "
 374                + Message.FINGERPRINT + " TEXT, "
 375                + Message.CARBON + " INTEGER, "
 376                + Message.EDITED + " TEXT, "
 377                + Message.READ + " NUMBER DEFAULT 1, "
 378                + Message.OOB + " INTEGER, "
 379                + Message.ERROR_MESSAGE + " TEXT,"
 380                + Message.READ_BY_MARKERS + " TEXT,"
 381                + Message.MARKABLE + " NUMBER DEFAULT 0,"
 382                + Message.DELETED + " NUMBER DEFAULT 0,"
 383                + Message.BODY_LANGUAGE + " TEXT,"
 384                + Message.REMOTE_MSG_ID + " TEXT, FOREIGN KEY("
 385                + Message.CONVERSATION + ") REFERENCES "
 386                + Conversation.TABLENAME + "(" + Conversation.UUID
 387                + ") ON DELETE CASCADE);");
 388        db.execSQL(CREATE_MESSAGE_TIME_INDEX);
 389        db.execSQL(CREATE_MESSAGE_CONVERSATION_INDEX);
 390        db.execSQL(CREATE_MESSAGE_DELETED_INDEX);
 391        db.execSQL(CREATE_MESSAGE_RELATIVE_FILE_PATH_INDEX);
 392        db.execSQL(CREATE_MESSAGE_TYPE_INDEX);
 393        db.execSQL(CREATE_CONTATCS_STATEMENT);
 394        db.execSQL(CREATE_DISCOVERY_RESULTS_STATEMENT);
 395        db.execSQL(CREATE_SESSIONS_STATEMENT);
 396        db.execSQL(CREATE_PREKEYS_STATEMENT);
 397        db.execSQL(CREATE_SIGNED_PREKEYS_STATEMENT);
 398        db.execSQL(CREATE_IDENTITIES_STATEMENT);
 399        db.execSQL(CREATE_PRESENCE_TEMPLATES_STATEMENT);
 400        db.execSQL(CREATE_RESOLVER_RESULTS_TABLE);
 401        db.execSQL(CREATE_MESSAGE_INDEX_TABLE);
 402        db.execSQL(CREATE_MESSAGE_INSERT_TRIGGER);
 403        db.execSQL(CREATE_MESSAGE_UPDATE_TRIGGER);
 404        db.execSQL(CREATE_MESSAGE_DELETE_TRIGGER);
 405    }
 406
 407    @Override
 408    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
 409        if (oldVersion < 2 && newVersion >= 2) {
 410            db.execSQL("update " + Account.TABLENAME + " set "
 411                    + Account.OPTIONS + " = " + Account.OPTIONS + " | 8");
 412        }
 413        if (oldVersion < 3 && newVersion >= 3) {
 414            db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 415                    + Message.TYPE + " NUMBER");
 416        }
 417        if (oldVersion < 5 && newVersion >= 5) {
 418            db.execSQL("DROP TABLE " + Contact.TABLENAME);
 419            db.execSQL(CREATE_CONTATCS_STATEMENT);
 420            db.execSQL("UPDATE " + Account.TABLENAME + " SET "
 421                    + Account.ROSTERVERSION + " = NULL");
 422        }
 423        if (oldVersion < 6 && newVersion >= 6) {
 424            db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 425                    + Message.TRUE_COUNTERPART + " TEXT");
 426        }
 427        if (oldVersion < 7 && newVersion >= 7) {
 428            db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 429                    + Message.REMOTE_MSG_ID + " TEXT");
 430            db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
 431                    + Contact.AVATAR + " TEXT");
 432            db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN "
 433                    + Account.AVATAR + " TEXT");
 434        }
 435        if (oldVersion < 8 && newVersion >= 8) {
 436            db.execSQL("ALTER TABLE " + Conversation.TABLENAME + " ADD COLUMN "
 437                    + Conversation.ATTRIBUTES + " TEXT");
 438        }
 439        if (oldVersion < 9 && newVersion >= 9) {
 440            db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
 441                    + Contact.LAST_TIME + " NUMBER");
 442            db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
 443                    + Contact.LAST_PRESENCE + " TEXT");
 444        }
 445        if (oldVersion < 10 && newVersion >= 10) {
 446            db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 447                    + Message.RELATIVE_FILE_PATH + " TEXT");
 448        }
 449        if (oldVersion < 11 && newVersion >= 11) {
 450            db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
 451                    + Contact.GROUPS + " TEXT");
 452            db.execSQL("delete from " + Contact.TABLENAME);
 453            db.execSQL("update " + Account.TABLENAME + " set " + Account.ROSTERVERSION + " = NULL");
 454        }
 455        if (oldVersion < 12 && newVersion >= 12) {
 456            db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 457                    + Message.SERVER_MSG_ID + " TEXT");
 458        }
 459        if (oldVersion < 13 && newVersion >= 13) {
 460            db.execSQL("delete from " + Contact.TABLENAME);
 461            db.execSQL("update " + Account.TABLENAME + " set " + Account.ROSTERVERSION + " = NULL");
 462        }
 463        if (oldVersion < 14 && newVersion >= 14) {
 464            canonicalizeJids(db);
 465        }
 466        if (oldVersion < 15 && newVersion >= 15) {
 467            recreateAxolotlDb(db);
 468            db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 469                    + Message.FINGERPRINT + " TEXT");
 470        }
 471        if (oldVersion < 16 && newVersion >= 16) {
 472            db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 473                    + Message.CARBON + " INTEGER");
 474        }
 475        if (oldVersion < 19 && newVersion >= 19) {
 476            db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.DISPLAY_NAME + " TEXT");
 477        }
 478        if (oldVersion < 20 && newVersion >= 20) {
 479            db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.HOSTNAME + " TEXT");
 480            db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.PORT + " NUMBER DEFAULT 5222");
 481        }
 482        if (oldVersion < 26 && newVersion >= 26) {
 483            db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.STATUS + " TEXT");
 484            db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.STATUS_MESSAGE + " TEXT");
 485        }
 486        if (oldVersion < 40 && newVersion >= 40) {
 487            db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.RESOURCE + " TEXT");
 488        }
 489        /* Any migrations that alter the Account table need to happen BEFORE this migration, as it
 490         * depends on account de-serialization.
 491         */
 492        if (oldVersion < 17 && newVersion >= 17 && newVersion < 31) {
 493            List<Account> accounts = getAccounts(db);
 494            for (Account account : accounts) {
 495                String ownDeviceIdString = account.getKey(SQLiteAxolotlStore.JSONKEY_REGISTRATION_ID);
 496                if (ownDeviceIdString == null) {
 497                    continue;
 498                }
 499                int ownDeviceId = Integer.valueOf(ownDeviceIdString);
 500                SignalProtocolAddress ownAddress = new SignalProtocolAddress(account.getJid().asBareJid().toString(), ownDeviceId);
 501                deleteSession(db, account, ownAddress);
 502                IdentityKeyPair identityKeyPair = loadOwnIdentityKeyPair(db, account);
 503                if (identityKeyPair != null) {
 504                    String[] selectionArgs = {
 505                            account.getUuid(),
 506                            CryptoHelper.bytesToHex(identityKeyPair.getPublicKey().serialize())
 507                    };
 508                    ContentValues values = new ContentValues();
 509                    values.put(SQLiteAxolotlStore.TRUSTED, 2);
 510                    db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, values,
 511                            SQLiteAxolotlStore.ACCOUNT + " = ? AND "
 512                                    + SQLiteAxolotlStore.FINGERPRINT + " = ? ",
 513                            selectionArgs);
 514                } else {
 515                    Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not load own identity key pair");
 516                }
 517            }
 518        }
 519        if (oldVersion < 18 && newVersion >= 18) {
 520            db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.READ + " NUMBER DEFAULT 1");
 521        }
 522
 523        if (oldVersion < 21 && newVersion >= 21) {
 524            List<Account> accounts = getAccounts(db);
 525            for (Account account : accounts) {
 526                account.unsetPgpSignature();
 527                db.update(Account.TABLENAME, account.getContentValues(), Account.UUID
 528                        + "=?", new String[]{account.getUuid()});
 529            }
 530        }
 531
 532        if (oldVersion >= 15 && oldVersion < 22 && newVersion >= 22) {
 533            db.execSQL("ALTER TABLE " + SQLiteAxolotlStore.IDENTITIES_TABLENAME + " ADD COLUMN " + SQLiteAxolotlStore.CERTIFICATE);
 534        }
 535
 536        if (oldVersion < 23 && newVersion >= 23) {
 537            db.execSQL(CREATE_DISCOVERY_RESULTS_STATEMENT);
 538        }
 539
 540        if (oldVersion < 24 && newVersion >= 24) {
 541            db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.EDITED + " TEXT");
 542        }
 543
 544        if (oldVersion < 25 && newVersion >= 25) {
 545            db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.OOB + " INTEGER");
 546        }
 547
 548        if (oldVersion < 26 && newVersion >= 26) {
 549            db.execSQL(CREATE_PRESENCE_TEMPLATES_STATEMENT);
 550        }
 551
 552        if (oldVersion < 27 && newVersion >= 27) {
 553            db.execSQL("DELETE FROM " + ServiceDiscoveryResult.TABLENAME);
 554        }
 555
 556        if (oldVersion < 28 && newVersion >= 28) {
 557            canonicalizeJids(db);
 558        }
 559
 560        if (oldVersion < 29 && newVersion >= 29) {
 561            db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.ERROR_MESSAGE + " TEXT");
 562        }
 563        if (oldVersion >= 15 && oldVersion < 31 && newVersion >= 31) {
 564            db.execSQL("ALTER TABLE " + SQLiteAxolotlStore.IDENTITIES_TABLENAME + " ADD COLUMN " + SQLiteAxolotlStore.TRUST + " TEXT");
 565            db.execSQL("ALTER TABLE " + SQLiteAxolotlStore.IDENTITIES_TABLENAME + " ADD COLUMN " + SQLiteAxolotlStore.ACTIVE + " NUMBER");
 566            HashMap<Integer, ContentValues> migration = new HashMap<>();
 567            migration.put(0, createFingerprintStatusContentValues(FingerprintStatus.Trust.TRUSTED, true));
 568            migration.put(1, createFingerprintStatusContentValues(FingerprintStatus.Trust.TRUSTED, true));
 569            migration.put(2, createFingerprintStatusContentValues(FingerprintStatus.Trust.UNTRUSTED, true));
 570            migration.put(3, createFingerprintStatusContentValues(FingerprintStatus.Trust.COMPROMISED, false));
 571            migration.put(4, createFingerprintStatusContentValues(FingerprintStatus.Trust.TRUSTED, false));
 572            migration.put(5, createFingerprintStatusContentValues(FingerprintStatus.Trust.TRUSTED, false));
 573            migration.put(6, createFingerprintStatusContentValues(FingerprintStatus.Trust.UNTRUSTED, false));
 574            migration.put(7, createFingerprintStatusContentValues(FingerprintStatus.Trust.VERIFIED_X509, true));
 575            migration.put(8, createFingerprintStatusContentValues(FingerprintStatus.Trust.VERIFIED_X509, false));
 576            for (Map.Entry<Integer, ContentValues> entry : migration.entrySet()) {
 577                String whereClause = SQLiteAxolotlStore.TRUSTED + "=?";
 578                String[] where = {String.valueOf(entry.getKey())};
 579                db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, entry.getValue(), whereClause, where);
 580            }
 581
 582        }
 583        if (oldVersion >= 15 && oldVersion < 32 && newVersion >= 32) {
 584            db.execSQL("ALTER TABLE " + SQLiteAxolotlStore.IDENTITIES_TABLENAME + " ADD COLUMN " + SQLiteAxolotlStore.LAST_ACTIVATION + " NUMBER");
 585            ContentValues defaults = new ContentValues();
 586            defaults.put(SQLiteAxolotlStore.LAST_ACTIVATION, System.currentTimeMillis());
 587            db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, defaults, null, null);
 588        }
 589        if (oldVersion >= 15 && oldVersion < 33 && newVersion >= 33) {
 590            String whereClause = SQLiteAxolotlStore.OWN + "=1";
 591            db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, createFingerprintStatusContentValues(FingerprintStatus.Trust.VERIFIED, true), whereClause, null);
 592        }
 593
 594        if (oldVersion < 34 && newVersion >= 34) {
 595            db.execSQL(CREATE_MESSAGE_TIME_INDEX);
 596
 597            final File oldPicturesDirectory = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/Conversations/");
 598            final File oldFilesDirectory = new File(Environment.getExternalStorageDirectory() + "/Conversations/");
 599            final File newFilesDirectory = new File(Environment.getExternalStorageDirectory() + "/Conversations/Media/Conversations Files/");
 600            final File newVideosDirectory = new File(Environment.getExternalStorageDirectory() + "/Conversations/Media/Conversations Videos/");
 601            if (oldPicturesDirectory.exists() && oldPicturesDirectory.isDirectory()) {
 602                final File newPicturesDirectory = new File(Environment.getExternalStorageDirectory() + "/Conversations/Media/Conversations Images/");
 603                newPicturesDirectory.getParentFile().mkdirs();
 604                if (oldPicturesDirectory.renameTo(newPicturesDirectory)) {
 605                    Log.d(Config.LOGTAG, "moved " + oldPicturesDirectory.getAbsolutePath() + " to " + newPicturesDirectory.getAbsolutePath());
 606                }
 607            }
 608            if (oldFilesDirectory.exists() && oldFilesDirectory.isDirectory()) {
 609                newFilesDirectory.mkdirs();
 610                newVideosDirectory.mkdirs();
 611                final File[] files = oldFilesDirectory.listFiles();
 612                if (files == null) {
 613                    return;
 614                }
 615                for (File file : files) {
 616                    if (file.getName().equals(".nomedia")) {
 617                        if (file.delete()) {
 618                            Log.d(Config.LOGTAG, "deleted nomedia file in " + oldFilesDirectory.getAbsolutePath());
 619                        }
 620                    } else if (file.isFile()) {
 621                        final String name = file.getName();
 622                        boolean isVideo = false;
 623                        int start = name.lastIndexOf('.') + 1;
 624                        if (start < name.length()) {
 625                            String mime = MimeUtils.guessMimeTypeFromExtension(name.substring(start));
 626                            isVideo = mime != null && mime.startsWith("video/");
 627                        }
 628                        File dst = new File((isVideo ? newVideosDirectory : newFilesDirectory).getAbsolutePath() + "/" + file.getName());
 629                        if (file.renameTo(dst)) {
 630                            Log.d(Config.LOGTAG, "moved " + file + " to " + dst);
 631                        }
 632                    }
 633                }
 634            }
 635        }
 636        if (oldVersion < 35 && newVersion >= 35) {
 637            db.execSQL(CREATE_MESSAGE_CONVERSATION_INDEX);
 638        }
 639        if (oldVersion < 36 && newVersion >= 36) {
 640            List<Account> accounts = getAccounts(db);
 641            for (Account account : accounts) {
 642                account.setOption(Account.OPTION_REQUIRES_ACCESS_MODE_CHANGE, true);
 643                account.setOption(Account.OPTION_LOGGED_IN_SUCCESSFULLY, false);
 644                db.update(Account.TABLENAME, account.getContentValues(), Account.UUID
 645                        + "=?", new String[]{account.getUuid()});
 646            }
 647        }
 648
 649        if (oldVersion < 37 && newVersion >= 37) {
 650            db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.READ_BY_MARKERS + " TEXT");
 651        }
 652
 653        if (oldVersion < 38 && newVersion >= 38) {
 654            db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.MARKABLE + " NUMBER DEFAULT 0");
 655        }
 656
 657        if (oldVersion < 39 && newVersion >= 39) {
 658            db.execSQL(CREATE_RESOLVER_RESULTS_TABLE);
 659        }
 660
 661        if (QuickConversationsService.isQuicksy() && oldVersion < 43 && newVersion >= 43) {
 662            List<Account> accounts = getAccounts(db);
 663            for (Account account : accounts) {
 664                account.setOption(Account.OPTION_MAGIC_CREATE, true);
 665                db.update(Account.TABLENAME, account.getContentValues(), Account.UUID
 666                        + "=?", new String[]{account.getUuid()});
 667            }
 668        }
 669
 670        if (oldVersion < 44 && newVersion >= 44) {
 671            db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.DELETED + " NUMBER DEFAULT 0");
 672            db.execSQL(CREATE_MESSAGE_DELETED_INDEX);
 673            db.execSQL(CREATE_MESSAGE_RELATIVE_FILE_PATH_INDEX);
 674            db.execSQL(CREATE_MESSAGE_TYPE_INDEX);
 675        }
 676
 677        if (oldVersion < 45 && newVersion >= 45) {
 678            db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.BODY_LANGUAGE);
 679        }
 680
 681        if (oldVersion < 46 && newVersion >= 46) {
 682            final long start = SystemClock.elapsedRealtime();
 683            db.rawQuery("PRAGMA secure_delete = FALSE", null).close();
 684            db.execSQL("update " + Message.TABLENAME + " set " + Message.EDITED + "=NULL");
 685            db.rawQuery("PRAGMA secure_delete=ON", null).close();
 686            final long diff = SystemClock.elapsedRealtime() - start;
 687            Log.d(Config.LOGTAG, "deleted old edit information in " + diff + "ms");
 688        }
 689        if (oldVersion < 47 && newVersion >= 47) {
 690            db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN " + Contact.PRESENCE_NAME + " TEXT");
 691        }
 692        if (oldVersion < 48 && newVersion >= 48) {
 693            db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN " + Contact.RTP_CAPABILITY + " TEXT");
 694        }
 695        if (oldVersion < 49 && newVersion >= 49) {
 696            db.beginTransaction();
 697            db.execSQL("DROP TRIGGER IF EXISTS after_message_insert;");
 698            db.execSQL("DROP TRIGGER IF EXISTS after_message_update;");
 699            db.execSQL("DROP TRIGGER IF EXISTS after_message_delete;");
 700            db.execSQL("DROP TABLE IF EXISTS messages_index;");
 701            // a hack that should not be necessary, but
 702            // there was at least one occurence when SQLite failed at this
 703            db.execSQL("DROP TABLE IF EXISTS messages_index_docsize;");
 704            db.execSQL("DROP TABLE IF EXISTS messages_index_segdir;");
 705            db.execSQL("DROP TABLE IF EXISTS messages_index_segments;");
 706            db.execSQL("DROP TABLE IF EXISTS messages_index_stat;");
 707            db.execSQL(CREATE_MESSAGE_INDEX_TABLE);
 708            db.execSQL(CREATE_MESSAGE_INSERT_TRIGGER);
 709            db.execSQL(CREATE_MESSAGE_UPDATE_TRIGGER);
 710            db.execSQL(CREATE_MESSAGE_DELETE_TRIGGER);
 711            db.setTransactionSuccessful();
 712            db.endTransaction();
 713            requiresMessageIndexRebuild = true;
 714        }
 715        if (oldVersion < 50 && newVersion >= 50) {
 716            db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.PINNED_MECHANISM + " TEXT");
 717            db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.PINNED_CHANNEL_BINDING + " TEXT");
 718        }
 719        if (oldVersion < 51 && newVersion >= 51) {
 720            db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.FAST_MECHANISM + " TEXT");
 721            db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.FAST_TOKEN + " TEXT");
 722        }
 723    }
 724
 725    private void canonicalizeJids(SQLiteDatabase db) {
 726        // migrate db to new, canonicalized JID domainpart representation
 727
 728        // Conversation table
 729        Cursor cursor = db.rawQuery("select * from " + Conversation.TABLENAME, new String[0]);
 730        while (cursor.moveToNext()) {
 731            String newJid;
 732            try {
 733                newJid = Jid.of(cursor.getString(cursor.getColumnIndex(Conversation.CONTACTJID))).toString();
 734            } catch (IllegalArgumentException ignored) {
 735                Log.e(Config.LOGTAG, "Failed to migrate Conversation CONTACTJID "
 736                        + cursor.getString(cursor.getColumnIndex(Conversation.CONTACTJID))
 737                        + ": " + ignored + ". Skipping...");
 738                continue;
 739            }
 740
 741            final String[] updateArgs = {
 742                    newJid,
 743                    cursor.getString(cursor.getColumnIndex(Conversation.UUID)),
 744            };
 745            db.execSQL("update " + Conversation.TABLENAME
 746                    + " set " + Conversation.CONTACTJID + " = ? "
 747                    + " where " + Conversation.UUID + " = ?", updateArgs);
 748        }
 749        cursor.close();
 750
 751        // Contact table
 752        cursor = db.rawQuery("select * from " + Contact.TABLENAME, new String[0]);
 753        while (cursor.moveToNext()) {
 754            String newJid;
 755            try {
 756                newJid = Jid.of(cursor.getString(cursor.getColumnIndex(Contact.JID))).toString();
 757            } catch (final IllegalArgumentException e) {
 758                Log.e(Config.LOGTAG, "Failed to migrate Contact JID "
 759                        + cursor.getString(cursor.getColumnIndex(Contact.JID))
 760                        + ":  Skipping...", e);
 761                continue;
 762            }
 763
 764            final String[] updateArgs = {
 765                    newJid,
 766                    cursor.getString(cursor.getColumnIndex(Contact.ACCOUNT)),
 767                    cursor.getString(cursor.getColumnIndex(Contact.JID)),
 768            };
 769            db.execSQL("update " + Contact.TABLENAME
 770                    + " set " + Contact.JID + " = ? "
 771                    + " where " + Contact.ACCOUNT + " = ? "
 772                    + " AND " + Contact.JID + " = ?", updateArgs);
 773        }
 774        cursor.close();
 775
 776        // Account table
 777        cursor = db.rawQuery("select * from " + Account.TABLENAME, new String[0]);
 778        while (cursor.moveToNext()) {
 779            String newServer;
 780            try {
 781                newServer = Jid.of(
 782                        cursor.getString(cursor.getColumnIndex(Account.USERNAME)),
 783                        cursor.getString(cursor.getColumnIndex(Account.SERVER)),
 784                        null
 785                ).getDomain().toEscapedString();
 786            } catch (IllegalArgumentException ignored) {
 787                Log.e(Config.LOGTAG, "Failed to migrate Account SERVER "
 788                        + cursor.getString(cursor.getColumnIndex(Account.SERVER))
 789                        + ": " + ignored + ". Skipping...");
 790                continue;
 791            }
 792
 793            String[] updateArgs = {
 794                    newServer,
 795                    cursor.getString(cursor.getColumnIndex(Account.UUID)),
 796            };
 797            db.execSQL("update " + Account.TABLENAME
 798                    + " set " + Account.SERVER + " = ? "
 799                    + " where " + Account.UUID + " = ?", updateArgs);
 800        }
 801        cursor.close();
 802    }
 803
 804    public DownloadableFile getFileForCid(Cid cid) {
 805        if (cid == null) return null;
 806
 807        SQLiteDatabase db = this.getReadableDatabase();
 808        Cursor cursor = db.query("cheogram.cids", new String[]{"path"}, "cid=?", new String[]{cid.toString()}, null, null, null);
 809        DownloadableFile f = null;
 810        if (cursor.moveToNext()) {
 811            f = new DownloadableFile(cursor.getString(0));
 812        }
 813        cursor.close();
 814        return f;
 815    }
 816
 817    public String getUrlForCid(Cid cid) {
 818        SQLiteDatabase db = this.getReadableDatabase();
 819        Cursor cursor = db.query("cheogram.cids", new String[]{"url"}, "cid=?", new String[]{cid.toString()}, null, null, null);
 820        String url = null;
 821        if (cursor.moveToNext()) {
 822            url = cursor.getString(0);
 823        }
 824        cursor.close();
 825        return url;
 826    }
 827
 828    public void saveCid(Cid cid, File file) {
 829        saveCid(cid, file, null);
 830    }
 831
 832    public void saveCid(Cid cid, File file, String url) {
 833        SQLiteDatabase db = this.getWritableDatabase();
 834        ContentValues cv = new ContentValues();
 835        cv.put("cid", cid.toString());
 836        if (file != null) cv.put("path", file.getAbsolutePath());
 837        if (url != null) cv.put("url", url);
 838        if (db.update("cheogram.cids", cv, "cid=?", new String[]{cid.toString()}) < 1) {
 839            db.insertWithOnConflict("cheogram.cids", null, cv, SQLiteDatabase.CONFLICT_REPLACE);
 840        }
 841    }
 842
 843    public void blockMedia(Cid cid) {
 844        SQLiteDatabase db = this.getWritableDatabase();
 845        ContentValues cv = new ContentValues();
 846        cv.put("cid", cid.toString());
 847        db.insertWithOnConflict("cheogram.blocked_media", null, cv, SQLiteDatabase.CONFLICT_REPLACE);
 848    }
 849
 850    public boolean isBlockedMedia(Cid cid) {
 851        SQLiteDatabase db = this.getReadableDatabase();
 852        Cursor cursor = db.query("cheogram.blocked_media", new String[]{"count(*)"}, "cid=?", new String[]{cid.toString()}, null, null, null);
 853        boolean is = false;
 854        if (cursor.moveToNext()) {
 855            is = cursor.getInt(0) > 0;
 856        }
 857        cursor.close();
 858        return is;
 859    }
 860
 861    public void clearBlockedMedia() {
 862        SQLiteDatabase db = this.getWritableDatabase();
 863        db.execSQL("DELETE FROM cheogram.blocked_media");
 864    }
 865
 866    public void insertWebxdcUpdate(final WebxdcUpdate update) {
 867        SQLiteDatabase db = this.getWritableDatabase();
 868        db.insertWithOnConflict("cheogram.webxdc_updates", null, update.getContentValues(), SQLiteDatabase.CONFLICT_IGNORE);
 869    }
 870
 871    public WebxdcUpdate findLastWebxdcUpdate(Message message) {
 872        if (message.getThread() == null) {
 873            Log.w(Config.LOGTAG, "WebXDC message with no thread!");
 874            return null;
 875        }
 876
 877        SQLiteDatabase db = this.getReadableDatabase();
 878        String[] selectionArgs = {message.getConversation().getUuid(), message.getThread().getContent()};
 879        Cursor cursor = db.query("cheogram.webxdc_updates", null,
 880                Message.CONVERSATION + "=? AND thread=?",
 881                selectionArgs, null, null, "serial ASC");
 882        WebxdcUpdate update = null;
 883        if (cursor.moveToLast()) {
 884            update = new WebxdcUpdate(cursor, cursor.getLong(cursor.getColumnIndex("serial")));
 885        }
 886        cursor.close();
 887        return update;
 888    }
 889
 890    public List<WebxdcUpdate> findWebxdcUpdates(Message message, long serial) {
 891        SQLiteDatabase db = this.getReadableDatabase();
 892        String[] selectionArgs = {message.getConversation().getUuid(), message.getThread().getContent(), String.valueOf(serial)};
 893        Cursor cursor = db.query("cheogram.webxdc_updates", null,
 894                Message.CONVERSATION + "=? AND thread=? AND serial>?",
 895                selectionArgs, null, null, "serial ASC");
 896        long maxSerial = 0;
 897        if (cursor.moveToLast()) {
 898            maxSerial = cursor.getLong(cursor.getColumnIndex("serial"));
 899        }
 900        cursor.moveToFirst();
 901        cursor.moveToPrevious();
 902
 903        List<WebxdcUpdate> updates = new ArrayList<>();
 904        while (cursor.moveToNext()) {
 905            updates.add(new WebxdcUpdate(cursor, maxSerial));
 906        }
 907        cursor.close();
 908        return updates;
 909    }
 910
 911    public void createConversation(Conversation conversation) {
 912        SQLiteDatabase db = this.getWritableDatabase();
 913        db.insert(Conversation.TABLENAME, null, conversation.getContentValues());
 914    }
 915
 916    public void createMessage(Message message) {
 917        SQLiteDatabase db = this.getWritableDatabase();
 918        db.insert(Message.TABLENAME, null, message.getContentValues());
 919        db.insert("cheogram." + Message.TABLENAME, null, message.getCheogramContentValues());
 920    }
 921
 922    public void createAccount(Account account) {
 923        SQLiteDatabase db = this.getWritableDatabase();
 924        db.insert(Account.TABLENAME, null, account.getContentValues());
 925    }
 926
 927    public void insertDiscoveryResult(ServiceDiscoveryResult result) {
 928        SQLiteDatabase db = this.getWritableDatabase();
 929        db.insert(ServiceDiscoveryResult.TABLENAME, null, result.getContentValues());
 930    }
 931
 932    public ServiceDiscoveryResult findDiscoveryResult(final String hash, final String ver) {
 933        SQLiteDatabase db = this.getReadableDatabase();
 934        String[] selectionArgs = {hash, ver};
 935        Cursor cursor = db.query(ServiceDiscoveryResult.TABLENAME, null,
 936                ServiceDiscoveryResult.HASH + "=? AND " + ServiceDiscoveryResult.VER + "=?",
 937                selectionArgs, null, null, null);
 938        if (cursor.getCount() == 0) {
 939            cursor.close();
 940            return null;
 941        }
 942        cursor.moveToFirst();
 943
 944        ServiceDiscoveryResult result = null;
 945        try {
 946            result = new ServiceDiscoveryResult(cursor);
 947        } catch (JSONException e) { /* result is still null */ }
 948
 949        cursor.close();
 950        return result;
 951    }
 952
 953    public void saveResolverResult(String domain, Resolver.Result result) {
 954        SQLiteDatabase db = this.getWritableDatabase();
 955        ContentValues contentValues = result.toContentValues();
 956        contentValues.put(Resolver.Result.DOMAIN, domain);
 957        db.insert(RESOLVER_RESULTS_TABLENAME, null, contentValues);
 958    }
 959
 960    public synchronized Resolver.Result findResolverResult(String domain) {
 961        SQLiteDatabase db = this.getReadableDatabase();
 962        String where = Resolver.Result.DOMAIN + "=?";
 963        String[] whereArgs = {domain};
 964        final Cursor cursor = db.query(RESOLVER_RESULTS_TABLENAME, null, where, whereArgs, null, null, null);
 965        Resolver.Result result = null;
 966        if (cursor != null) {
 967            try {
 968                if (cursor.moveToFirst()) {
 969                    result = Resolver.Result.fromCursor(cursor);
 970                }
 971            } catch (Exception e) {
 972                Log.d(Config.LOGTAG, "unable to find cached resolver result in database " + e.getMessage());
 973                return null;
 974            } finally {
 975                cursor.close();
 976            }
 977        }
 978        return result;
 979    }
 980
 981    public void insertPresenceTemplate(PresenceTemplate template) {
 982        SQLiteDatabase db = this.getWritableDatabase();
 983        String whereToDelete = PresenceTemplate.MESSAGE + "=?";
 984        String[] whereToDeleteArgs = {template.getStatusMessage()};
 985        db.delete(PresenceTemplate.TABELNAME, whereToDelete, whereToDeleteArgs);
 986        db.delete(PresenceTemplate.TABELNAME, PresenceTemplate.UUID + " not in (select " + PresenceTemplate.UUID + " from " + PresenceTemplate.TABELNAME + " order by " + PresenceTemplate.LAST_USED + " desc limit 9)", null);
 987        db.insert(PresenceTemplate.TABELNAME, null, template.getContentValues());
 988    }
 989
 990    public List<PresenceTemplate> getPresenceTemplates() {
 991        ArrayList<PresenceTemplate> templates = new ArrayList<>();
 992        SQLiteDatabase db = this.getReadableDatabase();
 993        Cursor cursor = db.query(PresenceTemplate.TABELNAME, null, null, null, null, null, PresenceTemplate.LAST_USED + " desc");
 994        while (cursor.moveToNext()) {
 995            templates.add(PresenceTemplate.fromCursor(cursor));
 996        }
 997        cursor.close();
 998        return templates;
 999    }
1000
1001    public CopyOnWriteArrayList<Conversation> getConversations(int status) {
1002        CopyOnWriteArrayList<Conversation> list = new CopyOnWriteArrayList<>();
1003        SQLiteDatabase db = this.getReadableDatabase();
1004        String[] selectionArgs = {Integer.toString(status)};
1005        Cursor cursor = db.rawQuery("select * from " + Conversation.TABLENAME
1006                + " where " + Conversation.STATUS + " = ? and " + Conversation.CONTACTJID + " is not null order by "
1007                + Conversation.CREATED + " desc", selectionArgs);
1008        while (cursor.moveToNext()) {
1009            final Conversation conversation = Conversation.fromCursor(cursor);
1010            if (conversation.getJid() instanceof InvalidJid) {
1011                continue;
1012            }
1013            list.add(conversation);
1014        }
1015        cursor.close();
1016        return list;
1017    }
1018
1019    public Message getMessage(Conversation conversation, String uuid) {
1020        ArrayList<Message> list = new ArrayList<>();
1021        SQLiteDatabase db = this.getReadableDatabase();
1022        Cursor cursor;
1023        cursor = db.rawQuery(
1024            "SELECT * FROM " + Message.TABLENAME + " " +
1025            "LEFT JOIN cheogram." + Message.TABLENAME +
1026            "  USING (" + Message.UUID + ")" +
1027            "WHERE " + Message.UUID + "=?",
1028            new String[]{uuid}
1029        );
1030        while (cursor.moveToNext()) {
1031            try {
1032                return Message.fromCursor(cursor, conversation);
1033            } catch (Exception e) {
1034                Log.e(Config.LOGTAG, "unable to restore message");
1035            }
1036        }
1037        cursor.close();
1038        return null;
1039    }
1040
1041    public ArrayList<Message> getMessages(Conversation conversations, int limit) {
1042        return getMessages(conversations, limit, -1);
1043    }
1044
1045    public ArrayList<Message> getMessages(Conversation conversation, int limit, long timestamp) {
1046        ArrayList<Message> list = new ArrayList<>();
1047        SQLiteDatabase db = this.getReadableDatabase();
1048        Cursor cursor;
1049        if (timestamp == -1) {
1050            String[] selectionArgs = {conversation.getUuid()};
1051            cursor = db.rawQuery(
1052                "SELECT * FROM " + Message.TABLENAME + " " +
1053                "LEFT JOIN cheogram." + Message.TABLENAME +
1054                "  USING (" + Message.UUID + ")" +
1055                "WHERE " + Message.CONVERSATION + "=? " +
1056                "ORDER BY " + Message.TIME_SENT + " DESC " +
1057                "LIMIT " + String.valueOf(limit),
1058                selectionArgs
1059            );
1060        } else {
1061            String[] selectionArgs = {conversation.getUuid(),
1062                    Long.toString(timestamp)};
1063            cursor = db.rawQuery(
1064                "SELECT * FROM " + Message.TABLENAME + " " +
1065                "LEFT JOIN cheogram." + Message.TABLENAME +
1066                "  USING (" + Message.UUID + ")" +
1067                "WHERE " + Message.CONVERSATION + "=? AND " +
1068                Message.TIME_SENT + "<? " +
1069                "ORDER BY " + Message.TIME_SENT + " DESC " +
1070                "LIMIT " + String.valueOf(limit),
1071                selectionArgs
1072            );
1073        }
1074        CursorUtils.upgradeCursorWindowSize(cursor);
1075        while (cursor.moveToNext()) {
1076            try {
1077                list.add(0, Message.fromCursor(cursor, conversation));
1078            } catch (Exception e) {
1079                Log.e(Config.LOGTAG, "unable to restore message");
1080            }
1081        }
1082        cursor.close();
1083        return list;
1084    }
1085
1086    public Cursor getMessageSearchCursor(final List<String> term, final String uuid) {
1087        final SQLiteDatabase db = this.getReadableDatabase();
1088        final StringBuilder SQL = new StringBuilder();
1089        final String[] selectionArgs;
1090        SQL.append("SELECT " + Message.TABLENAME + ".*," + Conversation.TABLENAME + "." + Conversation.CONTACTJID + "," + Conversation.TABLENAME + "." + Conversation.ACCOUNT + "," + Conversation.TABLENAME + "." + Conversation.MODE + " FROM " + Message.TABLENAME + " JOIN " + Conversation.TABLENAME + " ON " + Message.TABLENAME + "." + Message.CONVERSATION + "=" + Conversation.TABLENAME + "." + Conversation.UUID + " JOIN messages_index ON messages_index.rowid=messages.rowid WHERE " + Message.ENCRYPTION + " NOT IN(" + Message.ENCRYPTION_AXOLOTL_NOT_FOR_THIS_DEVICE + "," + Message.ENCRYPTION_PGP + "," + Message.ENCRYPTION_DECRYPTION_FAILED + "," + Message.ENCRYPTION_AXOLOTL_FAILED + ") AND " + Message.TYPE + " IN(" + Message.TYPE_TEXT + "," + Message.TYPE_PRIVATE + ") AND messages_index.body MATCH ?");
1091        if (uuid == null) {
1092            selectionArgs = new String[]{FtsUtils.toMatchString(term)};
1093        } else {
1094            selectionArgs = new String[]{FtsUtils.toMatchString(term), uuid};
1095            SQL.append(" AND " + Conversation.TABLENAME + '.' + Conversation.UUID + "=?");
1096        }
1097        SQL.append(" ORDER BY " + Message.TIME_SENT + " DESC limit " + Config.MAX_SEARCH_RESULTS);
1098        Log.d(Config.LOGTAG, "search term: " + FtsUtils.toMatchString(term));
1099        return db.rawQuery(SQL.toString(), selectionArgs);
1100    }
1101
1102    public List<String> markFileAsDeleted(final File file, final boolean internal) {
1103        SQLiteDatabase db = this.getReadableDatabase();
1104        String selection;
1105        String[] selectionArgs;
1106        if (internal) {
1107            final String name = file.getName();
1108            if (name.endsWith(".pgp")) {
1109                selection = "(" + Message.RELATIVE_FILE_PATH + " IN(?,?) OR (" + Message.RELATIVE_FILE_PATH + "=? and encryption in(1,4))) and type in (1,2,5)";
1110                selectionArgs = new String[]{file.getAbsolutePath(), name, name.substring(0, name.length() - 4)};
1111            } else {
1112                selection = Message.RELATIVE_FILE_PATH + " IN(?,?) and type in (1,2,5)";
1113                selectionArgs = new String[]{file.getAbsolutePath(), name};
1114            }
1115        } else {
1116            selection = Message.RELATIVE_FILE_PATH + "=? and type in (1,2,5)";
1117            selectionArgs = new String[]{file.getAbsolutePath()};
1118        }
1119        final List<String> uuids = new ArrayList<>();
1120        Cursor cursor = db.query(Message.TABLENAME, new String[]{Message.UUID}, selection, selectionArgs, null, null, null);
1121        while (cursor != null && cursor.moveToNext()) {
1122            uuids.add(cursor.getString(0));
1123        }
1124        if (cursor != null) {
1125            cursor.close();
1126        }
1127        markFileAsDeleted(uuids);
1128        return uuids;
1129    }
1130
1131    public void markFileAsDeleted(List<String> uuids) {
1132        SQLiteDatabase db = this.getReadableDatabase();
1133        final ContentValues contentValues = new ContentValues();
1134        final String where = Message.UUID + "=?";
1135        contentValues.put(Message.DELETED, 1);
1136        db.beginTransaction();
1137        for (String uuid : uuids) {
1138            db.update(Message.TABLENAME, contentValues, where, new String[]{uuid});
1139        }
1140        db.setTransactionSuccessful();
1141        db.endTransaction();
1142    }
1143
1144    public void markFilesAsChanged(List<FilePathInfo> files) {
1145        SQLiteDatabase db = this.getReadableDatabase();
1146        final String where = Message.UUID + "=?";
1147        db.beginTransaction();
1148        for (FilePathInfo info : files) {
1149            final ContentValues contentValues = new ContentValues();
1150            contentValues.put(Message.DELETED, info.deleted ? 1 : 0);
1151            db.update(Message.TABLENAME, contentValues, where, new String[]{info.uuid.toString()});
1152        }
1153        db.setTransactionSuccessful();
1154        db.endTransaction();
1155    }
1156
1157    public List<FilePathInfo> getFilePathInfo() {
1158        final SQLiteDatabase db = this.getReadableDatabase();
1159        final Cursor cursor = db.query(Message.TABLENAME, new String[]{Message.UUID, Message.RELATIVE_FILE_PATH, Message.DELETED}, "type in (1,2,5) and " + Message.RELATIVE_FILE_PATH + " is not null", null, null, null, null);
1160        final List<FilePathInfo> list = new ArrayList<>();
1161        while (cursor != null && cursor.moveToNext()) {
1162            list.add(new FilePathInfo(cursor.getString(0), cursor.getString(1), cursor.getInt(2) > 0));
1163        }
1164        if (cursor != null) {
1165            cursor.close();
1166        }
1167        return list;
1168    }
1169
1170    public List<FilePath> getRelativeFilePaths(String account, Jid jid, int limit) {
1171        SQLiteDatabase db = this.getReadableDatabase();
1172        final String SQL = "select uuid,relativeFilePath from messages where type in (1,2,5) and deleted=0 and " + Message.RELATIVE_FILE_PATH + " is not null and conversationUuid=(select uuid from conversations where accountUuid=? and (contactJid=? or contactJid like ?)) order by timeSent desc";
1173        final String[] args = {account, jid.toString(), jid.toString() + "/%"};
1174        Cursor cursor = db.rawQuery(SQL + (limit > 0 ? " limit " + limit : ""), args);
1175        List<FilePath> filesPaths = new ArrayList<>();
1176        while (cursor.moveToNext()) {
1177            filesPaths.add(new FilePath(cursor.getString(0), cursor.getString(1)));
1178        }
1179        cursor.close();
1180        return filesPaths;
1181    }
1182
1183    public static class FilePath {
1184        public final UUID uuid;
1185        public final String path;
1186
1187        private FilePath(String uuid, String path) {
1188            this.uuid = UUID.fromString(uuid);
1189            this.path = path;
1190        }
1191    }
1192
1193    public static class FilePathInfo extends FilePath {
1194        public boolean deleted;
1195
1196        private FilePathInfo(String uuid, String path, boolean deleted) {
1197            super(uuid, path);
1198            this.deleted = deleted;
1199        }
1200
1201        public boolean setDeleted(boolean deleted) {
1202            final boolean changed = deleted != this.deleted;
1203            this.deleted = deleted;
1204            return changed;
1205        }
1206    }
1207
1208    public Conversation findConversation(final Account account, final Jid contactJid) {
1209        SQLiteDatabase db = this.getReadableDatabase();
1210        String[] selectionArgs = {account.getUuid(),
1211                contactJid.asBareJid().toString() + "/%",
1212                contactJid.asBareJid().toString()
1213        };
1214        try(final Cursor cursor = db.query(Conversation.TABLENAME, null,
1215                Conversation.ACCOUNT + "=? AND (" + Conversation.CONTACTJID
1216                        + " like ? OR " + Conversation.CONTACTJID + "=?)", selectionArgs, null, null, null)) {
1217            if (cursor.getCount() == 0) {
1218                return null;
1219            }
1220            cursor.moveToFirst();
1221            final Conversation conversation = Conversation.fromCursor(cursor);
1222            if (conversation.getJid() instanceof InvalidJid) {
1223                return null;
1224            }
1225            return conversation;
1226        }
1227    }
1228
1229    public void updateConversation(final Conversation conversation) {
1230        final SQLiteDatabase db = this.getWritableDatabase();
1231        final String[] args = {conversation.getUuid()};
1232        db.update(Conversation.TABLENAME, conversation.getContentValues(),
1233                Conversation.UUID + "=?", args);
1234    }
1235
1236    public List<Account> getAccounts() {
1237        SQLiteDatabase db = this.getReadableDatabase();
1238        return getAccounts(db);
1239    }
1240
1241    public List<Jid> getAccountJids(final boolean enabledOnly) {
1242        final SQLiteDatabase db = this.getReadableDatabase();
1243        final List<Jid> jids = new ArrayList<>();
1244        final String[] columns = new String[]{Account.USERNAME, Account.SERVER};
1245        final String where = enabledOnly ? "not options & (1 <<1)" : null;
1246        try (final Cursor cursor = db.query(Account.TABLENAME, columns, where, null, null, null, null)) {
1247            while (cursor != null && cursor.moveToNext()) {
1248                jids.add(Jid.of(cursor.getString(0), cursor.getString(1), null));
1249            }
1250        } catch (final Exception e) {
1251            return jids;
1252        }
1253        return jids;
1254    }
1255
1256    private List<Account> getAccounts(SQLiteDatabase db) {
1257        final List<Account> list = new ArrayList<>();
1258        try (final Cursor cursor =
1259                db.query(Account.TABLENAME, null, null, null, null, null, null)) {
1260            while (cursor != null && cursor.moveToNext()) {
1261                list.add(Account.fromCursor(cursor));
1262            }
1263        }
1264        return list;
1265    }
1266
1267    public boolean updateAccount(Account account) {
1268        SQLiteDatabase db = this.getWritableDatabase();
1269        String[] args = {account.getUuid()};
1270        final int rows = db.update(Account.TABLENAME, account.getContentValues(), Account.UUID + "=?", args);
1271        return rows == 1;
1272    }
1273
1274    public boolean deleteAccount(Account account) {
1275        SQLiteDatabase db = this.getWritableDatabase();
1276        String[] args = {account.getUuid()};
1277        final int rows = db.delete(Account.TABLENAME, Account.UUID + "=?", args);
1278        return rows == 1;
1279    }
1280
1281    public boolean updateMessage(Message message, boolean includeBody) {
1282        SQLiteDatabase db = this.getWritableDatabase();
1283        String[] args = {message.getUuid()};
1284        ContentValues contentValues = message.getContentValues();
1285        contentValues.remove(Message.UUID);
1286        if (!includeBody) {
1287            contentValues.remove(Message.BODY);
1288        }
1289        return db.update(Message.TABLENAME, message.getContentValues(), Message.UUID + "=?", args) == 1 &&
1290               db.update("cheogram." + Message.TABLENAME, message.getCheogramContentValues(), Message.UUID + "=?", args) == 1;
1291    }
1292
1293    public boolean updateMessage(Message message, String uuid) {
1294        SQLiteDatabase db = this.getWritableDatabase();
1295        String[] args = {uuid};
1296        return db.update(Message.TABLENAME, message.getContentValues(), Message.UUID + "=?", args) == 1 &&
1297               db.update("cheogram." + Message.TABLENAME, message.getCheogramContentValues(), Message.UUID + "=?", args) == 1;
1298    }
1299
1300    public void readRoster(Roster roster) {
1301        final SQLiteDatabase db = this.getReadableDatabase();
1302        final String[] args = {roster.getAccount().getUuid()};
1303        try (final Cursor cursor =
1304                db.query(Contact.TABLENAME, null, Contact.ACCOUNT + "=?", args, null, null, null)) {
1305            while (cursor.moveToNext()) {
1306                roster.initContact(Contact.fromCursor(cursor));
1307            }
1308        }
1309    }
1310
1311    public void writeRoster(final Roster roster) {
1312        long start = SystemClock.elapsedRealtime();
1313        final Account account = roster.getAccount();
1314        final SQLiteDatabase db = this.getWritableDatabase();
1315        db.beginTransaction();
1316        for (Contact contact : roster.getContacts()) {
1317            if (contact.getOption(Contact.Options.IN_ROSTER) || contact.hasAvatarOrPresenceName() || contact.getOption(Contact.Options.SYNCED_VIA_OTHER)) {
1318                db.insert(Contact.TABLENAME, null, contact.getContentValues());
1319            } else {
1320                String where = Contact.ACCOUNT + "=? AND " + Contact.JID + "=?";
1321                String[] whereArgs = {account.getUuid(), contact.getJid().toString()};
1322                db.delete(Contact.TABLENAME, where, whereArgs);
1323            }
1324        }
1325        db.setTransactionSuccessful();
1326        db.endTransaction();
1327        account.setRosterVersion(roster.getVersion());
1328        updateAccount(account);
1329        long duration = SystemClock.elapsedRealtime() - start;
1330        Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": persisted roster in " + duration + "ms");
1331    }
1332
1333    public void deleteMessagesInConversation(Conversation conversation) {
1334        long start = SystemClock.elapsedRealtime();
1335        final SQLiteDatabase db = this.getWritableDatabase();
1336        db.beginTransaction();
1337        final String[] args = {conversation.getUuid()};
1338        int num = db.delete(Message.TABLENAME, Message.CONVERSATION + "=?", args);
1339        db.delete("cheogram.webxdc_updates", Message.CONVERSATION + "=?", args);
1340        db.setTransactionSuccessful();
1341        db.endTransaction();
1342        Log.d(Config.LOGTAG, "deleted " + num + " messages for " + conversation.getJid().asBareJid() + " in " + (SystemClock.elapsedRealtime() - start) + "ms");
1343    }
1344
1345    public void expireOldMessages(long timestamp) {
1346        final String[] args = {String.valueOf(timestamp)};
1347        SQLiteDatabase db = this.getReadableDatabase();
1348        db.beginTransaction();
1349        db.delete(Message.TABLENAME, "timeSent<?", args);
1350        db.setTransactionSuccessful();
1351        db.endTransaction();
1352    }
1353
1354    public MamReference getLastMessageReceived(Account account) {
1355        Cursor cursor = null;
1356        try {
1357            SQLiteDatabase db = this.getReadableDatabase();
1358            String sql = "select messages.timeSent,messages.serverMsgId from accounts join conversations on accounts.uuid=conversations.accountUuid join messages on conversations.uuid=messages.conversationUuid where accounts.uuid=? and (messages.status=0 or messages.carbon=1 or messages.serverMsgId not null) and (conversations.mode=0 or (messages.serverMsgId not null and messages.type=4)) order by messages.timesent desc limit 1";
1359            String[] args = {account.getUuid()};
1360            cursor = db.rawQuery(sql, args);
1361            if (cursor.getCount() == 0) {
1362                return null;
1363            } else {
1364                cursor.moveToFirst();
1365                return new MamReference(cursor.getLong(0), cursor.getString(1));
1366            }
1367        } catch (Exception e) {
1368            return null;
1369        } finally {
1370            if (cursor != null) {
1371                cursor.close();
1372            }
1373        }
1374    }
1375
1376    public long getLastTimeFingerprintUsed(Account account, String fingerprint) {
1377        String SQL = "select messages.timeSent from accounts join conversations on accounts.uuid=conversations.accountUuid join messages on conversations.uuid=messages.conversationUuid where accounts.uuid=? and messages.axolotl_fingerprint=? order by messages.timesent desc limit 1";
1378        String[] args = {account.getUuid(), fingerprint};
1379        Cursor cursor = getReadableDatabase().rawQuery(SQL, args);
1380        long time;
1381        if (cursor.moveToFirst()) {
1382            time = cursor.getLong(0);
1383        } else {
1384            time = 0;
1385        }
1386        cursor.close();
1387        return time;
1388    }
1389
1390    public MamReference getLastClearDate(Account account) {
1391        SQLiteDatabase db = this.getReadableDatabase();
1392        String[] columns = {Conversation.ATTRIBUTES};
1393        String selection = Conversation.ACCOUNT + "=?";
1394        String[] args = {account.getUuid()};
1395        Cursor cursor = db.query(Conversation.TABLENAME, columns, selection, args, null, null, null);
1396        MamReference maxClearDate = new MamReference(0);
1397        while (cursor.moveToNext()) {
1398            try {
1399                final JSONObject o = new JSONObject(cursor.getString(0));
1400                maxClearDate = MamReference.max(maxClearDate, MamReference.fromAttribute(o.getString(Conversation.ATTRIBUTE_LAST_CLEAR_HISTORY)));
1401            } catch (Exception e) {
1402                //ignored
1403            }
1404        }
1405        cursor.close();
1406        return maxClearDate;
1407    }
1408
1409    private Cursor getCursorForSession(Account account, SignalProtocolAddress contact) {
1410        final SQLiteDatabase db = this.getReadableDatabase();
1411        String[] selectionArgs = {account.getUuid(),
1412                contact.getName(),
1413                Integer.toString(contact.getDeviceId())};
1414        return db.query(SQLiteAxolotlStore.SESSION_TABLENAME,
1415                null,
1416                SQLiteAxolotlStore.ACCOUNT + " = ? AND "
1417                        + SQLiteAxolotlStore.NAME + " = ? AND "
1418                        + SQLiteAxolotlStore.DEVICE_ID + " = ? ",
1419                selectionArgs,
1420                null, null, null);
1421    }
1422
1423    public SessionRecord loadSession(Account account, SignalProtocolAddress contact) {
1424        SessionRecord session = null;
1425        Cursor cursor = getCursorForSession(account, contact);
1426        if (cursor.getCount() != 0) {
1427            cursor.moveToFirst();
1428            try {
1429                session = new SessionRecord(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT));
1430            } catch (IOException e) {
1431                cursor.close();
1432                throw new AssertionError(e);
1433            }
1434        }
1435        cursor.close();
1436        return session;
1437    }
1438
1439    public List<Integer> getSubDeviceSessions(Account account, SignalProtocolAddress contact) {
1440        final SQLiteDatabase db = this.getReadableDatabase();
1441        return getSubDeviceSessions(db, account, contact);
1442    }
1443
1444    private List<Integer> getSubDeviceSessions(SQLiteDatabase db, Account account, SignalProtocolAddress contact) {
1445        List<Integer> devices = new ArrayList<>();
1446        String[] columns = {SQLiteAxolotlStore.DEVICE_ID};
1447        String[] selectionArgs = {account.getUuid(),
1448                contact.getName()};
1449        Cursor cursor = db.query(SQLiteAxolotlStore.SESSION_TABLENAME,
1450                columns,
1451                SQLiteAxolotlStore.ACCOUNT + " = ? AND "
1452                        + SQLiteAxolotlStore.NAME + " = ?",
1453                selectionArgs,
1454                null, null, null);
1455
1456        while (cursor.moveToNext()) {
1457            devices.add(cursor.getInt(
1458                    cursor.getColumnIndex(SQLiteAxolotlStore.DEVICE_ID)));
1459        }
1460
1461        cursor.close();
1462        return devices;
1463    }
1464
1465    public List<String> getKnownSignalAddresses(Account account) {
1466        List<String> addresses = new ArrayList<>();
1467        String[] colums = {"DISTINCT " + SQLiteAxolotlStore.NAME};
1468        String[] selectionArgs = {account.getUuid()};
1469        Cursor cursor = getReadableDatabase().query(SQLiteAxolotlStore.SESSION_TABLENAME,
1470                colums,
1471                SQLiteAxolotlStore.ACCOUNT + " = ?",
1472                selectionArgs,
1473                null, null, null
1474        );
1475        while (cursor.moveToNext()) {
1476            addresses.add(cursor.getString(0));
1477        }
1478        cursor.close();
1479        return addresses;
1480    }
1481
1482    public boolean containsSession(Account account, SignalProtocolAddress contact) {
1483        Cursor cursor = getCursorForSession(account, contact);
1484        int count = cursor.getCount();
1485        cursor.close();
1486        return count != 0;
1487    }
1488
1489    public void storeSession(Account account, SignalProtocolAddress contact, SessionRecord session) {
1490        SQLiteDatabase db = this.getWritableDatabase();
1491        ContentValues values = new ContentValues();
1492        values.put(SQLiteAxolotlStore.NAME, contact.getName());
1493        values.put(SQLiteAxolotlStore.DEVICE_ID, contact.getDeviceId());
1494        values.put(SQLiteAxolotlStore.KEY, Base64.encodeToString(session.serialize(), Base64.DEFAULT));
1495        values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
1496        db.insert(SQLiteAxolotlStore.SESSION_TABLENAME, null, values);
1497    }
1498
1499    public void deleteSession(Account account, SignalProtocolAddress contact) {
1500        SQLiteDatabase db = this.getWritableDatabase();
1501        deleteSession(db, account, contact);
1502    }
1503
1504    private void deleteSession(SQLiteDatabase db, Account account, SignalProtocolAddress contact) {
1505        String[] args = {account.getUuid(),
1506                contact.getName(),
1507                Integer.toString(contact.getDeviceId())};
1508        db.delete(SQLiteAxolotlStore.SESSION_TABLENAME,
1509                SQLiteAxolotlStore.ACCOUNT + " = ? AND "
1510                        + SQLiteAxolotlStore.NAME + " = ? AND "
1511                        + SQLiteAxolotlStore.DEVICE_ID + " = ? ",
1512                args);
1513    }
1514
1515    public void deleteAllSessions(Account account, SignalProtocolAddress contact) {
1516        SQLiteDatabase db = this.getWritableDatabase();
1517        String[] args = {account.getUuid(), contact.getName()};
1518        db.delete(SQLiteAxolotlStore.SESSION_TABLENAME,
1519                SQLiteAxolotlStore.ACCOUNT + "=? AND "
1520                        + SQLiteAxolotlStore.NAME + " = ?",
1521                args);
1522    }
1523
1524    private Cursor getCursorForPreKey(Account account, int preKeyId) {
1525        SQLiteDatabase db = this.getReadableDatabase();
1526        String[] columns = {SQLiteAxolotlStore.KEY};
1527        String[] selectionArgs = {account.getUuid(), Integer.toString(preKeyId)};
1528        Cursor cursor = db.query(SQLiteAxolotlStore.PREKEY_TABLENAME,
1529                columns,
1530                SQLiteAxolotlStore.ACCOUNT + "=? AND "
1531                        + SQLiteAxolotlStore.ID + "=?",
1532                selectionArgs,
1533                null, null, null);
1534
1535        return cursor;
1536    }
1537
1538    public PreKeyRecord loadPreKey(Account account, int preKeyId) {
1539        PreKeyRecord record = null;
1540        Cursor cursor = getCursorForPreKey(account, preKeyId);
1541        if (cursor.getCount() != 0) {
1542            cursor.moveToFirst();
1543            try {
1544                record = new PreKeyRecord(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT));
1545            } catch (IOException e) {
1546                throw new AssertionError(e);
1547            }
1548        }
1549        cursor.close();
1550        return record;
1551    }
1552
1553    public boolean containsPreKey(Account account, int preKeyId) {
1554        Cursor cursor = getCursorForPreKey(account, preKeyId);
1555        int count = cursor.getCount();
1556        cursor.close();
1557        return count != 0;
1558    }
1559
1560    public void storePreKey(Account account, PreKeyRecord record) {
1561        SQLiteDatabase db = this.getWritableDatabase();
1562        ContentValues values = new ContentValues();
1563        values.put(SQLiteAxolotlStore.ID, record.getId());
1564        values.put(SQLiteAxolotlStore.KEY, Base64.encodeToString(record.serialize(), Base64.DEFAULT));
1565        values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
1566        db.insert(SQLiteAxolotlStore.PREKEY_TABLENAME, null, values);
1567    }
1568
1569    public int deletePreKey(Account account, int preKeyId) {
1570        SQLiteDatabase db = this.getWritableDatabase();
1571        String[] args = {account.getUuid(), Integer.toString(preKeyId)};
1572        return db.delete(SQLiteAxolotlStore.PREKEY_TABLENAME,
1573                SQLiteAxolotlStore.ACCOUNT + "=? AND "
1574                        + SQLiteAxolotlStore.ID + "=?",
1575                args);
1576    }
1577
1578    private Cursor getCursorForSignedPreKey(Account account, int signedPreKeyId) {
1579        SQLiteDatabase db = this.getReadableDatabase();
1580        String[] columns = {SQLiteAxolotlStore.KEY};
1581        String[] selectionArgs = {account.getUuid(), Integer.toString(signedPreKeyId)};
1582        Cursor cursor = db.query(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
1583                columns,
1584                SQLiteAxolotlStore.ACCOUNT + "=? AND " + SQLiteAxolotlStore.ID + "=?",
1585                selectionArgs,
1586                null, null, null);
1587
1588        return cursor;
1589    }
1590
1591    public SignedPreKeyRecord loadSignedPreKey(Account account, int signedPreKeyId) {
1592        SignedPreKeyRecord record = null;
1593        Cursor cursor = getCursorForSignedPreKey(account, signedPreKeyId);
1594        if (cursor.getCount() != 0) {
1595            cursor.moveToFirst();
1596            try {
1597                record = new SignedPreKeyRecord(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT));
1598            } catch (IOException e) {
1599                throw new AssertionError(e);
1600            }
1601        }
1602        cursor.close();
1603        return record;
1604    }
1605
1606    public List<SignedPreKeyRecord> loadSignedPreKeys(Account account) {
1607        List<SignedPreKeyRecord> prekeys = new ArrayList<>();
1608        SQLiteDatabase db = this.getReadableDatabase();
1609        String[] columns = {SQLiteAxolotlStore.KEY};
1610        String[] selectionArgs = {account.getUuid()};
1611        Cursor cursor = db.query(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
1612                columns,
1613                SQLiteAxolotlStore.ACCOUNT + "=?",
1614                selectionArgs,
1615                null, null, null);
1616
1617        while (cursor.moveToNext()) {
1618            try {
1619                prekeys.add(new SignedPreKeyRecord(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT)));
1620            } catch (IOException ignored) {
1621            }
1622        }
1623        cursor.close();
1624        return prekeys;
1625    }
1626
1627    public int getSignedPreKeysCount(Account account) {
1628        String[] columns = {"count(" + SQLiteAxolotlStore.KEY + ")"};
1629        String[] selectionArgs = {account.getUuid()};
1630        SQLiteDatabase db = this.getReadableDatabase();
1631        Cursor cursor = db.query(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
1632                columns,
1633                SQLiteAxolotlStore.ACCOUNT + "=?",
1634                selectionArgs,
1635                null, null, null);
1636        final int count;
1637        if (cursor.moveToFirst()) {
1638            count = cursor.getInt(0);
1639        } else {
1640            count = 0;
1641        }
1642        cursor.close();
1643        return count;
1644    }
1645
1646    public boolean containsSignedPreKey(Account account, int signedPreKeyId) {
1647        Cursor cursor = getCursorForPreKey(account, signedPreKeyId);
1648        int count = cursor.getCount();
1649        cursor.close();
1650        return count != 0;
1651    }
1652
1653    public void storeSignedPreKey(Account account, SignedPreKeyRecord record) {
1654        SQLiteDatabase db = this.getWritableDatabase();
1655        ContentValues values = new ContentValues();
1656        values.put(SQLiteAxolotlStore.ID, record.getId());
1657        values.put(SQLiteAxolotlStore.KEY, Base64.encodeToString(record.serialize(), Base64.DEFAULT));
1658        values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
1659        db.insert(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME, null, values);
1660    }
1661
1662    public void deleteSignedPreKey(Account account, int signedPreKeyId) {
1663        SQLiteDatabase db = this.getWritableDatabase();
1664        String[] args = {account.getUuid(), Integer.toString(signedPreKeyId)};
1665        db.delete(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
1666                SQLiteAxolotlStore.ACCOUNT + "=? AND "
1667                        + SQLiteAxolotlStore.ID + "=?",
1668                args);
1669    }
1670
1671    private Cursor getIdentityKeyCursor(Account account, String name, boolean own) {
1672        final SQLiteDatabase db = this.getReadableDatabase();
1673        return getIdentityKeyCursor(db, account, name, own);
1674    }
1675
1676    private Cursor getIdentityKeyCursor(SQLiteDatabase db, Account account, String name, boolean own) {
1677        return getIdentityKeyCursor(db, account, name, own, null);
1678    }
1679
1680    private Cursor getIdentityKeyCursor(Account account, String fingerprint) {
1681        final SQLiteDatabase db = this.getReadableDatabase();
1682        return getIdentityKeyCursor(db, account, fingerprint);
1683    }
1684
1685    private Cursor getIdentityKeyCursor(SQLiteDatabase db, Account account, String fingerprint) {
1686        return getIdentityKeyCursor(db, account, null, null, fingerprint);
1687    }
1688
1689    private Cursor getIdentityKeyCursor(SQLiteDatabase db, Account account, String name, Boolean own, String fingerprint) {
1690        String[] columns = {SQLiteAxolotlStore.TRUST,
1691                SQLiteAxolotlStore.ACTIVE,
1692                SQLiteAxolotlStore.LAST_ACTIVATION,
1693                SQLiteAxolotlStore.KEY};
1694        ArrayList<String> selectionArgs = new ArrayList<>(4);
1695        selectionArgs.add(account.getUuid());
1696        String selectionString = SQLiteAxolotlStore.ACCOUNT + " = ?";
1697        if (name != null) {
1698            selectionArgs.add(name);
1699            selectionString += " AND " + SQLiteAxolotlStore.NAME + " = ?";
1700        }
1701        if (fingerprint != null) {
1702            selectionArgs.add(fingerprint);
1703            selectionString += " AND " + SQLiteAxolotlStore.FINGERPRINT + " = ?";
1704        }
1705        if (own != null) {
1706            selectionArgs.add(own ? "1" : "0");
1707            selectionString += " AND " + SQLiteAxolotlStore.OWN + " = ?";
1708        }
1709        Cursor cursor = db.query(SQLiteAxolotlStore.IDENTITIES_TABLENAME,
1710                columns,
1711                selectionString,
1712                selectionArgs.toArray(new String[selectionArgs.size()]),
1713                null, null, null);
1714
1715        return cursor;
1716    }
1717
1718    public IdentityKeyPair loadOwnIdentityKeyPair(Account account) {
1719        SQLiteDatabase db = getReadableDatabase();
1720        return loadOwnIdentityKeyPair(db, account);
1721    }
1722
1723    private IdentityKeyPair loadOwnIdentityKeyPair(SQLiteDatabase db, Account account) {
1724        String name = account.getJid().asBareJid().toString();
1725        IdentityKeyPair identityKeyPair = null;
1726        Cursor cursor = getIdentityKeyCursor(db, account, name, true);
1727        if (cursor.getCount() != 0) {
1728            cursor.moveToFirst();
1729            try {
1730                identityKeyPair = new IdentityKeyPair(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT));
1731            } catch (InvalidKeyException e) {
1732                Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Encountered invalid IdentityKey in database for account" + account.getJid().asBareJid() + ", address: " + name);
1733            }
1734        }
1735        cursor.close();
1736
1737        return identityKeyPair;
1738    }
1739
1740    public Set<IdentityKey> loadIdentityKeys(Account account, String name) {
1741        return loadIdentityKeys(account, name, null);
1742    }
1743
1744    public Set<IdentityKey> loadIdentityKeys(Account account, String name, FingerprintStatus status) {
1745        Set<IdentityKey> identityKeys = new HashSet<>();
1746        Cursor cursor = getIdentityKeyCursor(account, name, false);
1747
1748        while (cursor.moveToNext()) {
1749            if (status != null && !FingerprintStatus.fromCursor(cursor).equals(status)) {
1750                continue;
1751            }
1752            try {
1753                String key = cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY));
1754                if (key != null) {
1755                    identityKeys.add(new IdentityKey(Base64.decode(key, Base64.DEFAULT), 0));
1756                } else {
1757                    Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Missing key (possibly preverified) in database for account" + account.getJid().asBareJid() + ", address: " + name);
1758                }
1759            } catch (InvalidKeyException e) {
1760                Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Encountered invalid IdentityKey in database for account" + account.getJid().asBareJid() + ", address: " + name);
1761            }
1762        }
1763        cursor.close();
1764
1765        return identityKeys;
1766    }
1767
1768    public long numTrustedKeys(Account account, String name) {
1769        SQLiteDatabase db = getReadableDatabase();
1770        String[] args = {
1771                account.getUuid(),
1772                name,
1773                FingerprintStatus.Trust.TRUSTED.toString(),
1774                FingerprintStatus.Trust.VERIFIED.toString(),
1775                FingerprintStatus.Trust.VERIFIED_X509.toString()
1776        };
1777        return DatabaseUtils.queryNumEntries(db, SQLiteAxolotlStore.IDENTITIES_TABLENAME,
1778                SQLiteAxolotlStore.ACCOUNT + " = ?"
1779                        + " AND " + SQLiteAxolotlStore.NAME + " = ?"
1780                        + " AND (" + SQLiteAxolotlStore.TRUST + " = ? OR " + SQLiteAxolotlStore.TRUST + " = ? OR " + SQLiteAxolotlStore.TRUST + " = ?)"
1781                        + " AND " + SQLiteAxolotlStore.ACTIVE + " > 0",
1782                args
1783        );
1784    }
1785
1786    private void storeIdentityKey(Account account, String name, boolean own, String fingerprint, String base64Serialized, FingerprintStatus status) {
1787        SQLiteDatabase db = this.getWritableDatabase();
1788        ContentValues values = new ContentValues();
1789        values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
1790        values.put(SQLiteAxolotlStore.NAME, name);
1791        values.put(SQLiteAxolotlStore.OWN, own ? 1 : 0);
1792        values.put(SQLiteAxolotlStore.FINGERPRINT, fingerprint);
1793        values.put(SQLiteAxolotlStore.KEY, base64Serialized);
1794        values.putAll(status.toContentValues());
1795        String where = SQLiteAxolotlStore.ACCOUNT + "=? AND " + SQLiteAxolotlStore.NAME + "=? AND " + SQLiteAxolotlStore.FINGERPRINT + " =?";
1796        String[] whereArgs = {account.getUuid(), name, fingerprint};
1797        int rows = db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, values, where, whereArgs);
1798        if (rows == 0) {
1799            db.insert(SQLiteAxolotlStore.IDENTITIES_TABLENAME, null, values);
1800        }
1801    }
1802
1803    public void storePreVerification(Account account, String name, String fingerprint, FingerprintStatus status) {
1804        SQLiteDatabase db = this.getWritableDatabase();
1805        ContentValues values = new ContentValues();
1806        values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
1807        values.put(SQLiteAxolotlStore.NAME, name);
1808        values.put(SQLiteAxolotlStore.OWN, 0);
1809        values.put(SQLiteAxolotlStore.FINGERPRINT, fingerprint);
1810        values.putAll(status.toContentValues());
1811        db.insert(SQLiteAxolotlStore.IDENTITIES_TABLENAME, null, values);
1812    }
1813
1814    public FingerprintStatus getFingerprintStatus(Account account, String fingerprint) {
1815        Cursor cursor = getIdentityKeyCursor(account, fingerprint);
1816        final FingerprintStatus status;
1817        if (cursor.getCount() > 0) {
1818            cursor.moveToFirst();
1819            status = FingerprintStatus.fromCursor(cursor);
1820        } else {
1821            status = null;
1822        }
1823        cursor.close();
1824        return status;
1825    }
1826
1827    public boolean setIdentityKeyTrust(Account account, String fingerprint, FingerprintStatus fingerprintStatus) {
1828        SQLiteDatabase db = this.getWritableDatabase();
1829        return setIdentityKeyTrust(db, account, fingerprint, fingerprintStatus);
1830    }
1831
1832    private boolean setIdentityKeyTrust(SQLiteDatabase db, Account account, String fingerprint, FingerprintStatus status) {
1833        String[] selectionArgs = {
1834                account.getUuid(),
1835                fingerprint
1836        };
1837        int rows = db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, status.toContentValues(),
1838                SQLiteAxolotlStore.ACCOUNT + " = ? AND "
1839                        + SQLiteAxolotlStore.FINGERPRINT + " = ? ",
1840                selectionArgs);
1841        return rows == 1;
1842    }
1843
1844    public boolean setIdentityKeyCertificate(Account account, String fingerprint, X509Certificate x509Certificate) {
1845        SQLiteDatabase db = this.getWritableDatabase();
1846        String[] selectionArgs = {
1847                account.getUuid(),
1848                fingerprint
1849        };
1850        try {
1851            ContentValues values = new ContentValues();
1852            values.put(SQLiteAxolotlStore.CERTIFICATE, x509Certificate.getEncoded());
1853            return db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, values,
1854                    SQLiteAxolotlStore.ACCOUNT + " = ? AND "
1855                            + SQLiteAxolotlStore.FINGERPRINT + " = ? ",
1856                    selectionArgs) == 1;
1857        } catch (CertificateEncodingException e) {
1858            Log.d(Config.LOGTAG, "could not encode certificate");
1859            return false;
1860        }
1861    }
1862
1863    public X509Certificate getIdentityKeyCertifcate(Account account, String fingerprint) {
1864        SQLiteDatabase db = this.getReadableDatabase();
1865        String[] selectionArgs = {
1866                account.getUuid(),
1867                fingerprint
1868        };
1869        String[] colums = {SQLiteAxolotlStore.CERTIFICATE};
1870        String selection = SQLiteAxolotlStore.ACCOUNT + " = ? AND " + SQLiteAxolotlStore.FINGERPRINT + " = ? ";
1871        Cursor cursor = db.query(SQLiteAxolotlStore.IDENTITIES_TABLENAME, colums, selection, selectionArgs, null, null, null);
1872        if (cursor.getCount() < 1) {
1873            return null;
1874        } else {
1875            cursor.moveToFirst();
1876            byte[] certificate = cursor.getBlob(cursor.getColumnIndex(SQLiteAxolotlStore.CERTIFICATE));
1877            cursor.close();
1878            if (certificate == null || certificate.length == 0) {
1879                return null;
1880            }
1881            try {
1882                CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
1883                return (X509Certificate) certificateFactory.generateCertificate(new ByteArrayInputStream(certificate));
1884            } catch (CertificateException e) {
1885                Log.d(Config.LOGTAG, "certificate exception " + e.getMessage());
1886                return null;
1887            }
1888        }
1889    }
1890
1891    public void storeIdentityKey(Account account, String name, IdentityKey identityKey, FingerprintStatus status) {
1892        storeIdentityKey(account, name, false, CryptoHelper.bytesToHex(identityKey.getPublicKey().serialize()), Base64.encodeToString(identityKey.serialize(), Base64.DEFAULT), status);
1893    }
1894
1895    public void storeOwnIdentityKeyPair(Account account, IdentityKeyPair identityKeyPair) {
1896        storeIdentityKey(account, account.getJid().asBareJid().toString(), true, CryptoHelper.bytesToHex(identityKeyPair.getPublicKey().serialize()), Base64.encodeToString(identityKeyPair.serialize(), Base64.DEFAULT), FingerprintStatus.createActiveVerified(false));
1897    }
1898
1899
1900    private void recreateAxolotlDb(SQLiteDatabase db) {
1901        Log.d(Config.LOGTAG, AxolotlService.LOGPREFIX + " : " + ">>> (RE)CREATING AXOLOTL DATABASE <<<");
1902        db.execSQL("DROP TABLE IF EXISTS " + SQLiteAxolotlStore.SESSION_TABLENAME);
1903        db.execSQL(CREATE_SESSIONS_STATEMENT);
1904        db.execSQL("DROP TABLE IF EXISTS " + SQLiteAxolotlStore.PREKEY_TABLENAME);
1905        db.execSQL(CREATE_PREKEYS_STATEMENT);
1906        db.execSQL("DROP TABLE IF EXISTS " + SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME);
1907        db.execSQL(CREATE_SIGNED_PREKEYS_STATEMENT);
1908        db.execSQL("DROP TABLE IF EXISTS " + SQLiteAxolotlStore.IDENTITIES_TABLENAME);
1909        db.execSQL(CREATE_IDENTITIES_STATEMENT);
1910    }
1911
1912    public void wipeAxolotlDb(Account account) {
1913        String accountName = account.getUuid();
1914        Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + ">>> WIPING AXOLOTL DATABASE FOR ACCOUNT " + accountName + " <<<");
1915        SQLiteDatabase db = this.getWritableDatabase();
1916        String[] deleteArgs = {
1917                accountName
1918        };
1919        db.delete(SQLiteAxolotlStore.SESSION_TABLENAME,
1920                SQLiteAxolotlStore.ACCOUNT + " = ?",
1921                deleteArgs);
1922        db.delete(SQLiteAxolotlStore.PREKEY_TABLENAME,
1923                SQLiteAxolotlStore.ACCOUNT + " = ?",
1924                deleteArgs);
1925        db.delete(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
1926                SQLiteAxolotlStore.ACCOUNT + " = ?",
1927                deleteArgs);
1928        db.delete(SQLiteAxolotlStore.IDENTITIES_TABLENAME,
1929                SQLiteAxolotlStore.ACCOUNT + " = ?",
1930                deleteArgs);
1931    }
1932
1933    public List<ShortcutService.FrequentContact> getFrequentContacts(int days) {
1934        SQLiteDatabase db = this.getReadableDatabase();
1935        final String SQL = "select " + Conversation.TABLENAME + "." + Conversation.ACCOUNT + "," + Conversation.TABLENAME + "." + Conversation.CONTACTJID + " from " + Conversation.TABLENAME + " join " + Message.TABLENAME + " on conversations.uuid=messages.conversationUuid where messages.status!=0 and carbon==0  and conversations.mode=0 and messages.timeSent>=? group by conversations.uuid order by count(body) desc limit 4;";
1936        String[] whereArgs = new String[]{String.valueOf(System.currentTimeMillis() - (Config.MILLISECONDS_IN_DAY * days))};
1937        Cursor cursor = db.rawQuery(SQL, whereArgs);
1938        ArrayList<ShortcutService.FrequentContact> contacts = new ArrayList<>();
1939        while (cursor.moveToNext()) {
1940            try {
1941                contacts.add(new ShortcutService.FrequentContact(cursor.getString(0), Jid.of(cursor.getString(1))));
1942            } catch (Exception e) {
1943                Log.d(Config.LOGTAG, e.getMessage());
1944            }
1945        }
1946        cursor.close();
1947        return contacts;
1948    }
1949}