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 org.json.JSONObject;
  15import org.whispersystems.libsignal.SignalProtocolAddress;
  16import org.whispersystems.libsignal.IdentityKey;
  17import org.whispersystems.libsignal.IdentityKeyPair;
  18import org.whispersystems.libsignal.InvalidKeyException;
  19import org.whispersystems.libsignal.state.PreKeyRecord;
  20import org.whispersystems.libsignal.state.SessionRecord;
  21import org.whispersystems.libsignal.state.SignedPreKeyRecord;
  22
  23import java.io.ByteArrayInputStream;
  24import java.io.File;
  25import java.io.IOException;
  26import java.security.cert.CertificateEncodingException;
  27import java.security.cert.CertificateException;
  28import java.security.cert.CertificateFactory;
  29import java.security.cert.X509Certificate;
  30import java.util.ArrayList;
  31import java.util.HashMap;
  32import java.util.HashSet;
  33import java.util.Iterator;
  34import java.util.List;
  35import java.util.Map;
  36import java.util.Set;
  37import java.util.concurrent.CopyOnWriteArrayList;
  38
  39import org.json.JSONException;
  40
  41import eu.siacs.conversations.Config;
  42import eu.siacs.conversations.crypto.axolotl.AxolotlService;
  43import eu.siacs.conversations.crypto.axolotl.FingerprintStatus;
  44import eu.siacs.conversations.crypto.axolotl.SQLiteAxolotlStore;
  45import eu.siacs.conversations.entities.Account;
  46import eu.siacs.conversations.entities.Contact;
  47import eu.siacs.conversations.entities.Conversation;
  48import eu.siacs.conversations.entities.Message;
  49import eu.siacs.conversations.entities.PresenceTemplate;
  50import eu.siacs.conversations.entities.Roster;
  51import eu.siacs.conversations.entities.ServiceDiscoveryResult;
  52import eu.siacs.conversations.services.ShortcutService;
  53import eu.siacs.conversations.utils.CryptoHelper;
  54import eu.siacs.conversations.utils.FtsUtils;
  55import eu.siacs.conversations.utils.MimeUtils;
  56import eu.siacs.conversations.utils.Resolver;
  57import eu.siacs.conversations.xmpp.InvalidJid;
  58import eu.siacs.conversations.xmpp.mam.MamReference;
  59import rocks.xmpp.addr.Jid;
  60
  61public class DatabaseBackend extends SQLiteOpenHelper {
  62
  63	private static final String DATABASE_NAME = "history";
  64	private static final int DATABASE_VERSION = 42;
  65	private static DatabaseBackend instance = null;
  66	private static String CREATE_CONTATCS_STATEMENT = "create table "
  67			+ Contact.TABLENAME + "(" + Contact.ACCOUNT + " TEXT, "
  68			+ Contact.SERVERNAME + " TEXT, " + Contact.SYSTEMNAME + " TEXT,"
  69			+ Contact.JID + " TEXT," + Contact.KEYS + " TEXT,"
  70			+ Contact.PHOTOURI + " TEXT," + Contact.OPTIONS + " NUMBER,"
  71			+ Contact.SYSTEMACCOUNT + " NUMBER, " + Contact.AVATAR + " TEXT, "
  72			+ Contact.LAST_PRESENCE + " TEXT, " + Contact.LAST_TIME + " NUMBER, "
  73			+ Contact.GROUPS + " TEXT, FOREIGN KEY(" + Contact.ACCOUNT + ") REFERENCES "
  74			+ Account.TABLENAME + "(" + Account.UUID
  75			+ ") ON DELETE CASCADE, UNIQUE(" + Contact.ACCOUNT + ", "
  76			+ Contact.JID + ") ON CONFLICT REPLACE);";
  77
  78	private static String CREATE_DISCOVERY_RESULTS_STATEMENT = "create table "
  79			+ ServiceDiscoveryResult.TABLENAME + "("
  80			+ ServiceDiscoveryResult.HASH + " TEXT, "
  81			+ ServiceDiscoveryResult.VER + " TEXT, "
  82			+ ServiceDiscoveryResult.RESULT + " TEXT, "
  83			+ "UNIQUE(" + ServiceDiscoveryResult.HASH + ", "
  84			+ ServiceDiscoveryResult.VER + ") ON CONFLICT REPLACE);";
  85
  86	private static String CREATE_PRESENCE_TEMPLATES_STATEMENT = "CREATE TABLE "
  87			+ PresenceTemplate.TABELNAME + "("
  88			+ PresenceTemplate.UUID + " TEXT, "
  89			+ PresenceTemplate.LAST_USED + " NUMBER,"
  90			+ PresenceTemplate.MESSAGE + " TEXT,"
  91			+ PresenceTemplate.STATUS + " TEXT,"
  92			+ "UNIQUE(" + PresenceTemplate.MESSAGE + "," + PresenceTemplate.STATUS + ") ON CONFLICT REPLACE);";
  93
  94	private static String CREATE_PREKEYS_STATEMENT = "CREATE TABLE "
  95			+ SQLiteAxolotlStore.PREKEY_TABLENAME + "("
  96			+ SQLiteAxolotlStore.ACCOUNT + " TEXT,  "
  97			+ SQLiteAxolotlStore.ID + " INTEGER, "
  98			+ SQLiteAxolotlStore.KEY + " TEXT, FOREIGN KEY("
  99			+ SQLiteAxolotlStore.ACCOUNT
 100			+ ") REFERENCES " + Account.TABLENAME + "(" + Account.UUID + ") ON DELETE CASCADE, "
 101			+ "UNIQUE( " + SQLiteAxolotlStore.ACCOUNT + ", "
 102			+ SQLiteAxolotlStore.ID
 103			+ ") ON CONFLICT REPLACE"
 104			+ ");";
 105
 106	private static String CREATE_SIGNED_PREKEYS_STATEMENT = "CREATE TABLE "
 107			+ SQLiteAxolotlStore.SIGNED_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 String CREATE_SESSIONS_STATEMENT = "CREATE TABLE "
 119			+ SQLiteAxolotlStore.SESSION_TABLENAME + "("
 120			+ SQLiteAxolotlStore.ACCOUNT + " TEXT,  "
 121			+ SQLiteAxolotlStore.NAME + " TEXT, "
 122			+ SQLiteAxolotlStore.DEVICE_ID + " INTEGER, "
 123			+ SQLiteAxolotlStore.KEY + " TEXT, FOREIGN KEY("
 124			+ SQLiteAxolotlStore.ACCOUNT
 125			+ ") REFERENCES " + Account.TABLENAME + "(" + Account.UUID + ") ON DELETE CASCADE, "
 126			+ "UNIQUE( " + SQLiteAxolotlStore.ACCOUNT + ", "
 127			+ SQLiteAxolotlStore.NAME + ", "
 128			+ SQLiteAxolotlStore.DEVICE_ID
 129			+ ") ON CONFLICT REPLACE"
 130			+ ");";
 131
 132	private static String CREATE_IDENTITIES_STATEMENT = "CREATE TABLE "
 133			+ SQLiteAxolotlStore.IDENTITIES_TABLENAME + "("
 134			+ SQLiteAxolotlStore.ACCOUNT + " TEXT,  "
 135			+ SQLiteAxolotlStore.NAME + " TEXT, "
 136			+ SQLiteAxolotlStore.OWN + " INTEGER, "
 137			+ SQLiteAxolotlStore.FINGERPRINT + " TEXT, "
 138			+ SQLiteAxolotlStore.CERTIFICATE + " BLOB, "
 139			+ SQLiteAxolotlStore.TRUST + " TEXT, "
 140			+ SQLiteAxolotlStore.ACTIVE + " NUMBER, "
 141			+ SQLiteAxolotlStore.LAST_ACTIVATION + " NUMBER,"
 142			+ SQLiteAxolotlStore.KEY + " TEXT, FOREIGN KEY("
 143			+ SQLiteAxolotlStore.ACCOUNT
 144			+ ") REFERENCES " + Account.TABLENAME + "(" + Account.UUID + ") ON DELETE CASCADE, "
 145			+ "UNIQUE( " + SQLiteAxolotlStore.ACCOUNT + ", "
 146			+ SQLiteAxolotlStore.NAME + ", "
 147			+ SQLiteAxolotlStore.FINGERPRINT
 148			+ ") ON CONFLICT IGNORE"
 149			+ ");";
 150
 151	private static String RESOLVER_RESULTS_TABLENAME = "resolver_results";
 152
 153	private static String CREATE_RESOLVER_RESULTS_TABLE = "create table " + RESOLVER_RESULTS_TABLENAME + "("
 154			+ Resolver.Result.DOMAIN + " TEXT,"
 155			+ Resolver.Result.HOSTNAME + " TEXT,"
 156			+ Resolver.Result.IP + " BLOB,"
 157			+ Resolver.Result.PRIORITY + " NUMBER,"
 158			+ Resolver.Result.DIRECT_TLS + " NUMBER,"
 159			+ Resolver.Result.AUTHENTICATED + " NUMBER,"
 160			+ Resolver.Result.PORT + " NUMBER,"
 161			+ "UNIQUE(" + Resolver.Result.DOMAIN + ") ON CONFLICT REPLACE"
 162			+ ");";
 163
 164	private static String CREATE_MESSAGE_TIME_INDEX = "create INDEX message_time_index ON " + Message.TABLENAME + "(" + Message.TIME_SENT + ")";
 165	private static String CREATE_MESSAGE_CONVERSATION_INDEX = "create INDEX message_conversation_index ON " + Message.TABLENAME + "(" + Message.CONVERSATION + ")";
 166
 167	private static String CREATE_MESSAGE_INDEX_TABLE = "CREATE VIRTUAL TABLE messages_index USING FTS4(uuid TEXT PRIMARY KEY, body TEXT)";
 168	private static String CREATE_MESSAGE_INSERT_TRIGGER = "CREATE TRIGGER after_message_insert AFTER INSERT ON " + Message.TABLENAME + " BEGIN INSERT INTO messages_index (uuid,body) VALUES (new.uuid,new.body); END;";
 169	private static 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 uuid=old.uuid; END;";
 170	private static String COPY_PREEXISTING_ENTRIES = "INSERT into messages_index(uuid,body) select uuid,body FROM " + Message.TABLENAME + ";";
 171
 172	private DatabaseBackend(Context context) {
 173		super(context, DATABASE_NAME, null, DATABASE_VERSION);
 174	}
 175
 176	private static ContentValues createFingerprintStatusContentValues(FingerprintStatus.Trust trust, boolean active) {
 177		ContentValues values = new ContentValues();
 178		values.put(SQLiteAxolotlStore.TRUST, trust.toString());
 179		values.put(SQLiteAxolotlStore.ACTIVE, active ? 1 : 0);
 180		return values;
 181	}
 182
 183	public static synchronized DatabaseBackend getInstance(Context context) {
 184		if (instance == null) {
 185			instance = new DatabaseBackend(context);
 186		}
 187		return instance;
 188	}
 189
 190	@Override
 191	public void onConfigure(SQLiteDatabase db) {
 192		db.execSQL("PRAGMA foreign_keys=ON");
 193	}
 194
 195	@Override
 196	public void onCreate(SQLiteDatabase db) {
 197		db.execSQL("create table " + Account.TABLENAME + "(" + Account.UUID + " TEXT PRIMARY KEY,"
 198				+ Account.USERNAME + " TEXT,"
 199				+ Account.SERVER + " TEXT,"
 200				+ Account.PASSWORD + " TEXT,"
 201				+ Account.DISPLAY_NAME + " TEXT, "
 202				+ Account.STATUS + " TEXT,"
 203				+ Account.STATUS_MESSAGE + " TEXT,"
 204				+ Account.ROSTERVERSION + " TEXT,"
 205				+ Account.OPTIONS + " NUMBER, "
 206				+ Account.AVATAR + " TEXT, "
 207				+ Account.KEYS + " TEXT, "
 208				+ Account.HOSTNAME + " TEXT, "
 209				+ Account.RESOURCE + " TEXT,"
 210				+ Account.PORT + " NUMBER DEFAULT 5222)");
 211		db.execSQL("create table " + Conversation.TABLENAME + " ("
 212				+ Conversation.UUID + " TEXT PRIMARY KEY, " + Conversation.NAME
 213				+ " TEXT, " + Conversation.CONTACT + " TEXT, "
 214				+ Conversation.ACCOUNT + " TEXT, " + Conversation.CONTACTJID
 215				+ " TEXT, " + Conversation.CREATED + " NUMBER, "
 216				+ Conversation.STATUS + " NUMBER, " + Conversation.MODE
 217				+ " NUMBER, " + Conversation.ATTRIBUTES + " TEXT, FOREIGN KEY("
 218				+ Conversation.ACCOUNT + ") REFERENCES " + Account.TABLENAME
 219				+ "(" + Account.UUID + ") ON DELETE CASCADE);");
 220		db.execSQL("create table " + Message.TABLENAME + "( " + Message.UUID
 221				+ " TEXT PRIMARY KEY, " + Message.CONVERSATION + " TEXT, "
 222				+ Message.TIME_SENT + " NUMBER, " + Message.COUNTERPART
 223				+ " TEXT, " + Message.TRUE_COUNTERPART + " TEXT,"
 224				+ Message.BODY + " TEXT, " + Message.ENCRYPTION + " NUMBER, "
 225				+ Message.STATUS + " NUMBER," + Message.TYPE + " NUMBER, "
 226				+ Message.RELATIVE_FILE_PATH + " TEXT, "
 227				+ Message.SERVER_MSG_ID + " TEXT, "
 228				+ Message.FINGERPRINT + " TEXT, "
 229				+ Message.CARBON + " INTEGER, "
 230				+ Message.EDITED + " TEXT, "
 231				+ Message.READ + " NUMBER DEFAULT 1, "
 232				+ Message.OOB + " INTEGER, "
 233				+ Message.ERROR_MESSAGE + " TEXT,"
 234				+ Message.READ_BY_MARKERS + " TEXT,"
 235				+ Message.MARKABLE + " NUMBER DEFAULT 0,"
 236				+ Message.REMOTE_MSG_ID + " TEXT, FOREIGN KEY("
 237				+ Message.CONVERSATION + ") REFERENCES "
 238				+ Conversation.TABLENAME + "(" + Conversation.UUID
 239				+ ") ON DELETE CASCADE);");
 240		db.execSQL(CREATE_MESSAGE_TIME_INDEX);
 241		db.execSQL(CREATE_MESSAGE_CONVERSATION_INDEX);
 242		db.execSQL(CREATE_CONTATCS_STATEMENT);
 243		db.execSQL(CREATE_DISCOVERY_RESULTS_STATEMENT);
 244		db.execSQL(CREATE_SESSIONS_STATEMENT);
 245		db.execSQL(CREATE_PREKEYS_STATEMENT);
 246		db.execSQL(CREATE_SIGNED_PREKEYS_STATEMENT);
 247		db.execSQL(CREATE_IDENTITIES_STATEMENT);
 248		db.execSQL(CREATE_PRESENCE_TEMPLATES_STATEMENT);
 249		db.execSQL(CREATE_RESOLVER_RESULTS_TABLE);
 250		db.execSQL(CREATE_MESSAGE_INDEX_TABLE);
 251		db.execSQL(CREATE_MESSAGE_INSERT_TRIGGER);
 252		db.execSQL(CREATE_MESSAGE_UPDATE_TRIGGER);
 253	}
 254
 255	@Override
 256	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
 257		if (oldVersion < 2 && newVersion >= 2) {
 258			db.execSQL("update " + Account.TABLENAME + " set "
 259					+ Account.OPTIONS + " = " + Account.OPTIONS + " | 8");
 260		}
 261		if (oldVersion < 3 && newVersion >= 3) {
 262			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 263					+ Message.TYPE + " NUMBER");
 264		}
 265		if (oldVersion < 5 && newVersion >= 5) {
 266			db.execSQL("DROP TABLE " + Contact.TABLENAME);
 267			db.execSQL(CREATE_CONTATCS_STATEMENT);
 268			db.execSQL("UPDATE " + Account.TABLENAME + " SET "
 269					+ Account.ROSTERVERSION + " = NULL");
 270		}
 271		if (oldVersion < 6 && newVersion >= 6) {
 272			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 273					+ Message.TRUE_COUNTERPART + " TEXT");
 274		}
 275		if (oldVersion < 7 && newVersion >= 7) {
 276			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 277					+ Message.REMOTE_MSG_ID + " TEXT");
 278			db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
 279					+ Contact.AVATAR + " TEXT");
 280			db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN "
 281					+ Account.AVATAR + " TEXT");
 282		}
 283		if (oldVersion < 8 && newVersion >= 8) {
 284			db.execSQL("ALTER TABLE " + Conversation.TABLENAME + " ADD COLUMN "
 285					+ Conversation.ATTRIBUTES + " TEXT");
 286		}
 287		if (oldVersion < 9 && newVersion >= 9) {
 288			db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
 289					+ Contact.LAST_TIME + " NUMBER");
 290			db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
 291					+ Contact.LAST_PRESENCE + " TEXT");
 292		}
 293		if (oldVersion < 10 && newVersion >= 10) {
 294			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 295					+ Message.RELATIVE_FILE_PATH + " TEXT");
 296		}
 297		if (oldVersion < 11 && newVersion >= 11) {
 298			db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
 299					+ Contact.GROUPS + " TEXT");
 300			db.execSQL("delete from " + Contact.TABLENAME);
 301			db.execSQL("update " + Account.TABLENAME + " set " + Account.ROSTERVERSION + " = NULL");
 302		}
 303		if (oldVersion < 12 && newVersion >= 12) {
 304			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 305					+ Message.SERVER_MSG_ID + " TEXT");
 306		}
 307		if (oldVersion < 13 && newVersion >= 13) {
 308			db.execSQL("delete from " + Contact.TABLENAME);
 309			db.execSQL("update " + Account.TABLENAME + " set " + Account.ROSTERVERSION + " = NULL");
 310		}
 311		if (oldVersion < 14 && newVersion >= 14) {
 312			canonicalizeJids(db);
 313		}
 314		if (oldVersion < 15 && newVersion >= 15) {
 315			recreateAxolotlDb(db);
 316			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 317					+ Message.FINGERPRINT + " TEXT");
 318		}
 319		if (oldVersion < 16 && newVersion >= 16) {
 320			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 321					+ Message.CARBON + " INTEGER");
 322		}
 323		if (oldVersion < 19 && newVersion >= 19) {
 324			db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.DISPLAY_NAME + " TEXT");
 325		}
 326		if (oldVersion < 20 && newVersion >= 20) {
 327			db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.HOSTNAME + " TEXT");
 328			db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.PORT + " NUMBER DEFAULT 5222");
 329		}
 330		if (oldVersion < 26 && newVersion >= 26) {
 331			db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.STATUS + " TEXT");
 332			db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.STATUS_MESSAGE + " TEXT");
 333		}
 334		if (oldVersion < 40 && newVersion >= 40) {
 335			db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.RESOURCE + " TEXT");
 336		}
 337		/* Any migrations that alter the Account table need to happen BEFORE this migration, as it
 338		 * depends on account de-serialization.
 339		 */
 340		if (oldVersion < 17 && newVersion >= 17 && newVersion < 31) {
 341			List<Account> accounts = getAccounts(db);
 342			for (Account account : accounts) {
 343				String ownDeviceIdString = account.getKey(SQLiteAxolotlStore.JSONKEY_REGISTRATION_ID);
 344				if (ownDeviceIdString == null) {
 345					continue;
 346				}
 347				int ownDeviceId = Integer.valueOf(ownDeviceIdString);
 348				SignalProtocolAddress ownAddress = new SignalProtocolAddress(account.getJid().asBareJid().toString(), ownDeviceId);
 349				deleteSession(db, account, ownAddress);
 350				IdentityKeyPair identityKeyPair = loadOwnIdentityKeyPair(db, account);
 351				if (identityKeyPair != null) {
 352					String[] selectionArgs = {
 353							account.getUuid(),
 354							CryptoHelper.bytesToHex(identityKeyPair.getPublicKey().serialize())
 355					};
 356					ContentValues values = new ContentValues();
 357					values.put(SQLiteAxolotlStore.TRUSTED, 2);
 358					db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, values,
 359							SQLiteAxolotlStore.ACCOUNT + " = ? AND "
 360									+ SQLiteAxolotlStore.FINGERPRINT + " = ? ",
 361							selectionArgs);
 362				} else {
 363					Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not load own identity key pair");
 364				}
 365			}
 366		}
 367		if (oldVersion < 18 && newVersion >= 18) {
 368			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.READ + " NUMBER DEFAULT 1");
 369		}
 370
 371		if (oldVersion < 21 && newVersion >= 21) {
 372			List<Account> accounts = getAccounts(db);
 373			for (Account account : accounts) {
 374				account.unsetPgpSignature();
 375				db.update(Account.TABLENAME, account.getContentValues(), Account.UUID
 376						+ "=?", new String[]{account.getUuid()});
 377			}
 378		}
 379
 380		if (oldVersion >= 15 && oldVersion < 22 && newVersion >= 22) {
 381			db.execSQL("ALTER TABLE " + SQLiteAxolotlStore.IDENTITIES_TABLENAME + " ADD COLUMN " + SQLiteAxolotlStore.CERTIFICATE);
 382		}
 383
 384		if (oldVersion < 23 && newVersion >= 23) {
 385			db.execSQL(CREATE_DISCOVERY_RESULTS_STATEMENT);
 386		}
 387
 388		if (oldVersion < 24 && newVersion >= 24) {
 389			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.EDITED + " TEXT");
 390		}
 391
 392		if (oldVersion < 25 && newVersion >= 25) {
 393			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.OOB + " INTEGER");
 394		}
 395
 396		if (oldVersion < 26 && newVersion >= 26) {
 397			db.execSQL(CREATE_PRESENCE_TEMPLATES_STATEMENT);
 398		}
 399
 400		if (oldVersion < 27 && newVersion >= 27) {
 401			db.execSQL("DELETE FROM " + ServiceDiscoveryResult.TABLENAME);
 402		}
 403
 404		if (oldVersion < 28 && newVersion >= 28) {
 405			canonicalizeJids(db);
 406		}
 407
 408		if (oldVersion < 29 && newVersion >= 29) {
 409			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.ERROR_MESSAGE + " TEXT");
 410		}
 411		if (oldVersion >= 15 && oldVersion < 31 && newVersion >= 31) {
 412			db.execSQL("ALTER TABLE " + SQLiteAxolotlStore.IDENTITIES_TABLENAME + " ADD COLUMN " + SQLiteAxolotlStore.TRUST + " TEXT");
 413			db.execSQL("ALTER TABLE " + SQLiteAxolotlStore.IDENTITIES_TABLENAME + " ADD COLUMN " + SQLiteAxolotlStore.ACTIVE + " NUMBER");
 414			HashMap<Integer, ContentValues> migration = new HashMap<>();
 415			migration.put(0, createFingerprintStatusContentValues(FingerprintStatus.Trust.TRUSTED, true));
 416			migration.put(1, createFingerprintStatusContentValues(FingerprintStatus.Trust.TRUSTED, true));
 417			migration.put(2, createFingerprintStatusContentValues(FingerprintStatus.Trust.UNTRUSTED, true));
 418			migration.put(3, createFingerprintStatusContentValues(FingerprintStatus.Trust.COMPROMISED, false));
 419			migration.put(4, createFingerprintStatusContentValues(FingerprintStatus.Trust.TRUSTED, false));
 420			migration.put(5, createFingerprintStatusContentValues(FingerprintStatus.Trust.TRUSTED, false));
 421			migration.put(6, createFingerprintStatusContentValues(FingerprintStatus.Trust.UNTRUSTED, false));
 422			migration.put(7, createFingerprintStatusContentValues(FingerprintStatus.Trust.VERIFIED_X509, true));
 423			migration.put(8, createFingerprintStatusContentValues(FingerprintStatus.Trust.VERIFIED_X509, false));
 424			for (Map.Entry<Integer, ContentValues> entry : migration.entrySet()) {
 425				String whereClause = SQLiteAxolotlStore.TRUSTED + "=?";
 426				String[] where = {String.valueOf(entry.getKey())};
 427				db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, entry.getValue(), whereClause, where);
 428			}
 429
 430		}
 431		if (oldVersion >= 15 && oldVersion < 32 && newVersion >= 32) {
 432			db.execSQL("ALTER TABLE " + SQLiteAxolotlStore.IDENTITIES_TABLENAME + " ADD COLUMN " + SQLiteAxolotlStore.LAST_ACTIVATION + " NUMBER");
 433			ContentValues defaults = new ContentValues();
 434			defaults.put(SQLiteAxolotlStore.LAST_ACTIVATION, System.currentTimeMillis());
 435			db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, defaults, null, null);
 436		}
 437		if (oldVersion >= 15 && oldVersion < 33 && newVersion >= 33) {
 438			String whereClause = SQLiteAxolotlStore.OWN + "=1";
 439			db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, createFingerprintStatusContentValues(FingerprintStatus.Trust.VERIFIED, true), whereClause, null);
 440		}
 441
 442		if (oldVersion < 34 && newVersion >= 34) {
 443			db.execSQL(CREATE_MESSAGE_TIME_INDEX);
 444
 445			final File oldPicturesDirectory = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/Conversations/");
 446			final File oldFilesDirectory = new File(Environment.getExternalStorageDirectory() + "/Conversations/");
 447			final File newFilesDirectory = new File(Environment.getExternalStorageDirectory() + "/Conversations/Media/Conversations Files/");
 448			final File newVideosDirectory = new File(Environment.getExternalStorageDirectory() + "/Conversations/Media/Conversations Videos/");
 449			if (oldPicturesDirectory.exists() && oldPicturesDirectory.isDirectory()) {
 450				final File newPicturesDirectory = new File(Environment.getExternalStorageDirectory() + "/Conversations/Media/Conversations Images/");
 451				newPicturesDirectory.getParentFile().mkdirs();
 452				if (oldPicturesDirectory.renameTo(newPicturesDirectory)) {
 453					Log.d(Config.LOGTAG, "moved " + oldPicturesDirectory.getAbsolutePath() + " to " + newPicturesDirectory.getAbsolutePath());
 454				}
 455			}
 456			if (oldFilesDirectory.exists() && oldFilesDirectory.isDirectory()) {
 457				newFilesDirectory.mkdirs();
 458				newVideosDirectory.mkdirs();
 459				final File[] files = oldFilesDirectory.listFiles();
 460				if (files == null) {
 461					return;
 462				}
 463				for (File file : files) {
 464					if (file.getName().equals(".nomedia")) {
 465						if (file.delete()) {
 466							Log.d(Config.LOGTAG, "deleted nomedia file in " + oldFilesDirectory.getAbsolutePath());
 467						}
 468					} else if (file.isFile()) {
 469						final String name = file.getName();
 470						boolean isVideo = false;
 471						int start = name.lastIndexOf('.') + 1;
 472						if (start < name.length()) {
 473							String mime = MimeUtils.guessMimeTypeFromExtension(name.substring(start));
 474							isVideo = mime != null && mime.startsWith("video/");
 475						}
 476						File dst = new File((isVideo ? newVideosDirectory : newFilesDirectory).getAbsolutePath() + "/" + file.getName());
 477						if (file.renameTo(dst)) {
 478							Log.d(Config.LOGTAG, "moved " + file + " to " + dst);
 479						}
 480					}
 481				}
 482			}
 483		}
 484		if (oldVersion < 35 && newVersion >= 35) {
 485			db.execSQL(CREATE_MESSAGE_CONVERSATION_INDEX);
 486		}
 487		if (oldVersion < 36 && newVersion >= 36) {
 488			List<Account> accounts = getAccounts(db);
 489			for (Account account : accounts) {
 490				account.setOption(Account.OPTION_REQUIRES_ACCESS_MODE_CHANGE, true);
 491				account.setOption(Account.OPTION_LOGGED_IN_SUCCESSFULLY, false);
 492				db.update(Account.TABLENAME, account.getContentValues(), Account.UUID
 493						+ "=?", new String[]{account.getUuid()});
 494			}
 495		}
 496
 497		if (oldVersion < 37 && newVersion >= 37) {
 498			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.READ_BY_MARKERS + " TEXT");
 499		}
 500
 501		if (oldVersion < 38 && newVersion >= 38) {
 502			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.MARKABLE + " NUMBER DEFAULT 0");
 503		}
 504
 505		if (oldVersion < 39 && newVersion >= 39) {
 506			db.execSQL(CREATE_RESOLVER_RESULTS_TABLE);
 507		}
 508
 509		if (oldVersion < 41 && newVersion >= 41) {
 510			db.execSQL(CREATE_MESSAGE_INDEX_TABLE);
 511			db.execSQL(CREATE_MESSAGE_INSERT_TRIGGER);
 512			db.execSQL(CREATE_MESSAGE_UPDATE_TRIGGER);
 513			db.execSQL(COPY_PREEXISTING_ENTRIES);
 514		}
 515
 516		if (oldVersion < 42 && newVersion >= 42) {
 517			db.execSQL("DROP TRIGGER IF EXISTS after_message_delete");
 518		}
 519	}
 520
 521	private void canonicalizeJids(SQLiteDatabase db) {
 522		// migrate db to new, canonicalized JID domainpart representation
 523
 524		// Conversation table
 525		Cursor cursor = db.rawQuery("select * from " + Conversation.TABLENAME, new String[0]);
 526		while (cursor.moveToNext()) {
 527			String newJid;
 528			try {
 529				newJid = Jid.of(cursor.getString(cursor.getColumnIndex(Conversation.CONTACTJID))).toString();
 530			} catch (IllegalArgumentException ignored) {
 531				Log.e(Config.LOGTAG, "Failed to migrate Conversation CONTACTJID "
 532						+ cursor.getString(cursor.getColumnIndex(Conversation.CONTACTJID))
 533						+ ": " + ignored + ". Skipping...");
 534				continue;
 535			}
 536
 537			String updateArgs[] = {
 538					newJid,
 539					cursor.getString(cursor.getColumnIndex(Conversation.UUID)),
 540			};
 541			db.execSQL("update " + Conversation.TABLENAME
 542					+ " set " + Conversation.CONTACTJID + " = ? "
 543					+ " where " + Conversation.UUID + " = ?", updateArgs);
 544		}
 545		cursor.close();
 546
 547		// Contact table
 548		cursor = db.rawQuery("select * from " + Contact.TABLENAME, new String[0]);
 549		while (cursor.moveToNext()) {
 550			String newJid;
 551			try {
 552				newJid = Jid.of(cursor.getString(cursor.getColumnIndex(Contact.JID))).toString();
 553			} catch (IllegalArgumentException ignored) {
 554				Log.e(Config.LOGTAG, "Failed to migrate Contact JID "
 555						+ cursor.getString(cursor.getColumnIndex(Contact.JID))
 556						+ ": " + ignored + ". Skipping...");
 557				continue;
 558			}
 559
 560			String updateArgs[] = {
 561					newJid,
 562					cursor.getString(cursor.getColumnIndex(Contact.ACCOUNT)),
 563					cursor.getString(cursor.getColumnIndex(Contact.JID)),
 564			};
 565			db.execSQL("update " + Contact.TABLENAME
 566					+ " set " + Contact.JID + " = ? "
 567					+ " where " + Contact.ACCOUNT + " = ? "
 568					+ " AND " + Contact.JID + " = ?", updateArgs);
 569		}
 570		cursor.close();
 571
 572		// Account table
 573		cursor = db.rawQuery("select * from " + Account.TABLENAME, new String[0]);
 574		while (cursor.moveToNext()) {
 575			String newServer;
 576			try {
 577				newServer = Jid.of(
 578						cursor.getString(cursor.getColumnIndex(Account.USERNAME)),
 579						cursor.getString(cursor.getColumnIndex(Account.SERVER)),
 580						null
 581				).getDomain();
 582			} catch (IllegalArgumentException ignored) {
 583				Log.e(Config.LOGTAG, "Failed to migrate Account SERVER "
 584						+ cursor.getString(cursor.getColumnIndex(Account.SERVER))
 585						+ ": " + ignored + ". Skipping...");
 586				continue;
 587			}
 588
 589			String updateArgs[] = {
 590					newServer,
 591					cursor.getString(cursor.getColumnIndex(Account.UUID)),
 592			};
 593			db.execSQL("update " + Account.TABLENAME
 594					+ " set " + Account.SERVER + " = ? "
 595					+ " where " + Account.UUID + " = ?", updateArgs);
 596		}
 597		cursor.close();
 598	}
 599
 600	public void createConversation(Conversation conversation) {
 601		SQLiteDatabase db = this.getWritableDatabase();
 602		db.insert(Conversation.TABLENAME, null, conversation.getContentValues());
 603	}
 604
 605	public void createMessage(Message message) {
 606		SQLiteDatabase db = this.getWritableDatabase();
 607		db.insert(Message.TABLENAME, null, message.getContentValues());
 608	}
 609
 610	public void createAccount(Account account) {
 611		SQLiteDatabase db = this.getWritableDatabase();
 612		db.insert(Account.TABLENAME, null, account.getContentValues());
 613	}
 614
 615	public void insertDiscoveryResult(ServiceDiscoveryResult result) {
 616		SQLiteDatabase db = this.getWritableDatabase();
 617		db.insert(ServiceDiscoveryResult.TABLENAME, null, result.getContentValues());
 618	}
 619
 620	public ServiceDiscoveryResult findDiscoveryResult(final String hash, final String ver) {
 621		SQLiteDatabase db = this.getReadableDatabase();
 622		String[] selectionArgs = {hash, ver};
 623		Cursor cursor = db.query(ServiceDiscoveryResult.TABLENAME, null,
 624				ServiceDiscoveryResult.HASH + "=? AND " + ServiceDiscoveryResult.VER + "=?",
 625				selectionArgs, null, null, null);
 626		if (cursor.getCount() == 0) {
 627			cursor.close();
 628			return null;
 629		}
 630		cursor.moveToFirst();
 631
 632		ServiceDiscoveryResult result = null;
 633		try {
 634			result = new ServiceDiscoveryResult(cursor);
 635		} catch (JSONException e) { /* result is still null */ }
 636
 637		cursor.close();
 638		return result;
 639	}
 640
 641	public void saveResolverResult(String domain, Resolver.Result result) {
 642		SQLiteDatabase db = this.getWritableDatabase();
 643		ContentValues contentValues = result.toContentValues();
 644		contentValues.put(Resolver.Result.DOMAIN, domain);
 645		db.insert(RESOLVER_RESULTS_TABLENAME, null, contentValues);
 646	}
 647
 648	public Resolver.Result findResolverResult(String domain) {
 649		SQLiteDatabase db = this.getReadableDatabase();
 650		String where = Resolver.Result.DOMAIN + "=?";
 651		String[] whereArgs = {domain};
 652		Cursor cursor = db.query(RESOLVER_RESULTS_TABLENAME, null, where, whereArgs, null, null, null);
 653		Resolver.Result result = null;
 654		if (cursor != null) {
 655			if (cursor.moveToFirst()) {
 656				result = Resolver.Result.fromCursor(cursor);
 657			}
 658			cursor.close();
 659		}
 660		return result;
 661	}
 662
 663	public void insertPresenceTemplate(PresenceTemplate template) {
 664		SQLiteDatabase db = this.getWritableDatabase();
 665		String whereToDelete = PresenceTemplate.MESSAGE + "=?";
 666		String[] whereToDeleteArgs = {template.getStatusMessage()};
 667		db.delete(PresenceTemplate.TABELNAME, whereToDelete, whereToDeleteArgs);
 668		db.delete(PresenceTemplate.TABELNAME, PresenceTemplate.UUID + " not in (select " + PresenceTemplate.UUID + " from " + PresenceTemplate.TABELNAME + " order by " + PresenceTemplate.LAST_USED + " desc limit 9)", null);
 669		db.insert(PresenceTemplate.TABELNAME, null, template.getContentValues());
 670	}
 671
 672	public List<PresenceTemplate> getPresenceTemplates() {
 673		ArrayList<PresenceTemplate> templates = new ArrayList<>();
 674		SQLiteDatabase db = this.getReadableDatabase();
 675		Cursor cursor = db.query(PresenceTemplate.TABELNAME, null, null, null, null, null, PresenceTemplate.LAST_USED + " desc");
 676		while (cursor.moveToNext()) {
 677			templates.add(PresenceTemplate.fromCursor(cursor));
 678		}
 679		cursor.close();
 680		return templates;
 681	}
 682
 683	public CopyOnWriteArrayList<Conversation> getConversations(int status) {
 684		CopyOnWriteArrayList<Conversation> list = new CopyOnWriteArrayList<>();
 685		SQLiteDatabase db = this.getReadableDatabase();
 686		String[] selectionArgs = {Integer.toString(status)};
 687		Cursor cursor = db.rawQuery("select * from " + Conversation.TABLENAME
 688				+ " where " + Conversation.STATUS + " = ? and " + Conversation.CONTACTJID + " is not null order by "
 689				+ Conversation.CREATED + " desc", selectionArgs);
 690		while (cursor.moveToNext()) {
 691			final Conversation conversation = Conversation.fromCursor(cursor);
 692			if (conversation.getJid() instanceof InvalidJid) {
 693				continue;
 694			}
 695			list.add(conversation);
 696		}
 697		cursor.close();
 698		return list;
 699	}
 700
 701	public ArrayList<Message> getMessages(Conversation conversations, int limit) {
 702		return getMessages(conversations, limit, -1);
 703	}
 704
 705	public ArrayList<Message> getMessages(Conversation conversation, int limit, long timestamp) {
 706		ArrayList<Message> list = new ArrayList<>();
 707		SQLiteDatabase db = this.getReadableDatabase();
 708		Cursor cursor;
 709		if (timestamp == -1) {
 710			String[] selectionArgs = {conversation.getUuid()};
 711			cursor = db.query(Message.TABLENAME, null, Message.CONVERSATION
 712					+ "=?", selectionArgs, null, null, Message.TIME_SENT
 713					+ " DESC", String.valueOf(limit));
 714		} else {
 715			String[] selectionArgs = {conversation.getUuid(),
 716					Long.toString(timestamp)};
 717			cursor = db.query(Message.TABLENAME, null, Message.CONVERSATION
 718							+ "=? and " + Message.TIME_SENT + "<?", selectionArgs,
 719					null, null, Message.TIME_SENT + " DESC",
 720					String.valueOf(limit));
 721		}
 722		if (cursor.getCount() > 0) {
 723			cursor.moveToLast();
 724			do {
 725				Message message = Message.fromCursor(cursor, conversation);
 726				if (message != null) {
 727					list.add(message);
 728				}
 729			} while (cursor.moveToPrevious());
 730		}
 731		cursor.close();
 732		return list;
 733	}
 734
 735	public Cursor getMessageSearchCursor(List<String> term) {
 736		SQLiteDatabase db = this.getReadableDatabase();
 737		String SQL = "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.uuid=messages.uuid where " + Message.ENCRYPTION + " NOT IN(" + Message.ENCRYPTION_AXOLOTL_NOT_FOR_THIS_DEVICE + ',' + Message.ENCRYPTION_PGP + ',' + Message.ENCRYPTION_DECRYPTION_FAILED + ") AND " + Message.TYPE + " IN(" + Message.TYPE_TEXT + ',' + Message.TYPE_PRIVATE + ") AND messages_index.body MATCH ? ORDER BY " + Message.TIME_SENT + " DESC limit " + Config.MAX_SEARCH_RESULTS;
 738		Log.d(Config.LOGTAG, "search term: " + FtsUtils.toMatchString(term));
 739		return db.rawQuery(SQL, new String[]{FtsUtils.toMatchString(term)});
 740	}
 741
 742	public Iterable<Message> getMessagesIterable(final Conversation conversation) {
 743		return () -> {
 744			class MessageIterator implements Iterator<Message> {
 745				private SQLiteDatabase db = getReadableDatabase();
 746				private String[] selectionArgs = {conversation.getUuid()};
 747				private Cursor cursor = db.query(Message.TABLENAME, null, Message.CONVERSATION
 748						+ "=?", selectionArgs, null, null, Message.TIME_SENT
 749						+ " ASC", null);
 750
 751				private MessageIterator() {
 752					cursor.moveToFirst();
 753				}
 754
 755				@Override
 756				public boolean hasNext() {
 757					return !cursor.isAfterLast();
 758				}
 759
 760				@Override
 761				public Message next() {
 762					Message message = Message.fromCursor(cursor, conversation);
 763					cursor.moveToNext();
 764					return message;
 765				}
 766
 767				@Override
 768				public void remove() {
 769					throw new UnsupportedOperationException();
 770				}
 771			}
 772			return new MessageIterator();
 773		};
 774	}
 775
 776	public Conversation findConversation(final Account account, final Jid contactJid) {
 777		SQLiteDatabase db = this.getReadableDatabase();
 778		String[] selectionArgs = {account.getUuid(),
 779				contactJid.asBareJid().toString() + "/%",
 780				contactJid.asBareJid().toString()
 781		};
 782		Cursor cursor = db.query(Conversation.TABLENAME, null,
 783				Conversation.ACCOUNT + "=? AND (" + Conversation.CONTACTJID
 784						+ " like ? OR " + Conversation.CONTACTJID + "=?)", selectionArgs, null, null, null);
 785		if (cursor.getCount() == 0) {
 786			cursor.close();
 787			return null;
 788		}
 789		cursor.moveToFirst();
 790		Conversation conversation = Conversation.fromCursor(cursor);
 791		cursor.close();
 792		if (conversation.getJid() instanceof InvalidJid) {
 793			return null;
 794		}
 795		return conversation;
 796	}
 797
 798	public void updateConversation(final Conversation conversation) {
 799		final SQLiteDatabase db = this.getWritableDatabase();
 800		final String[] args = {conversation.getUuid()};
 801		db.update(Conversation.TABLENAME, conversation.getContentValues(),
 802				Conversation.UUID + "=?", args);
 803	}
 804
 805	public List<Account> getAccounts() {
 806		SQLiteDatabase db = this.getReadableDatabase();
 807		return getAccounts(db);
 808	}
 809
 810	public List<Jid> getAccountJids() {
 811		SQLiteDatabase db = this.getReadableDatabase();
 812		final List<Jid> jids = new ArrayList<>();
 813		final String[] columns = new String[]{Account.USERNAME, Account.SERVER};
 814		String where = "not options & (1 <<1)";
 815		Cursor cursor = db.query(Account.TABLENAME, columns, where, null, null, null, null);
 816		try {
 817			while (cursor.moveToNext()) {
 818				jids.add(Jid.of(cursor.getString(0), cursor.getString(1), null));
 819			}
 820			return jids;
 821		} catch (Exception e) {
 822			return jids;
 823		} finally {
 824			if (cursor != null) {
 825				cursor.close();
 826			}
 827		}
 828	}
 829
 830	private List<Account> getAccounts(SQLiteDatabase db) {
 831		List<Account> list = new ArrayList<>();
 832		Cursor cursor = db.query(Account.TABLENAME, null, null, null, null,
 833				null, null);
 834		while (cursor.moveToNext()) {
 835			list.add(Account.fromCursor(cursor));
 836		}
 837		cursor.close();
 838		return list;
 839	}
 840
 841	public boolean updateAccount(Account account) {
 842		SQLiteDatabase db = this.getWritableDatabase();
 843		String[] args = {account.getUuid()};
 844		final int rows = db.update(Account.TABLENAME, account.getContentValues(), Account.UUID + "=?", args);
 845		return rows == 1;
 846	}
 847
 848	public boolean deleteAccount(Account account) {
 849		SQLiteDatabase db = this.getWritableDatabase();
 850		String[] args = {account.getUuid()};
 851		final int rows = db.delete(Account.TABLENAME, Account.UUID + "=?", args);
 852		return rows == 1;
 853	}
 854
 855	public boolean updateMessage(Message message, boolean includeBody) {
 856		SQLiteDatabase db = this.getWritableDatabase();
 857		String[] args = {message.getUuid()};
 858		ContentValues contentValues = message.getContentValues();
 859		contentValues.remove(Message.UUID);
 860		if (!includeBody) {
 861			contentValues.remove(Message.BODY);
 862		}
 863		return db.update(Message.TABLENAME, message.getContentValues(), Message.UUID + "=?", args) == 1;
 864	}
 865
 866	public void updateMessage(Message message, String uuid) {
 867		SQLiteDatabase db = this.getWritableDatabase();
 868		String[] args = {uuid};
 869		db.update(Message.TABLENAME, message.getContentValues(), Message.UUID
 870				+ "=?", args);
 871	}
 872
 873	public void readRoster(Roster roster) {
 874		SQLiteDatabase db = this.getReadableDatabase();
 875		Cursor cursor;
 876		String args[] = {roster.getAccount().getUuid()};
 877		cursor = db.query(Contact.TABLENAME, null, Contact.ACCOUNT + "=?", args, null, null, null);
 878		while (cursor.moveToNext()) {
 879			roster.initContact(Contact.fromCursor(cursor));
 880		}
 881		cursor.close();
 882	}
 883
 884	public void writeRoster(final Roster roster) {
 885		long start = SystemClock.elapsedRealtime();
 886		final Account account = roster.getAccount();
 887		final SQLiteDatabase db = this.getWritableDatabase();
 888		db.beginTransaction();
 889		for (Contact contact : roster.getContacts()) {
 890			if (contact.getOption(Contact.Options.IN_ROSTER)) {
 891				db.insert(Contact.TABLENAME, null, contact.getContentValues());
 892			} else {
 893				String where = Contact.ACCOUNT + "=? AND " + Contact.JID + "=?";
 894				String[] whereArgs = {account.getUuid(), contact.getJid().toString()};
 895				db.delete(Contact.TABLENAME, where, whereArgs);
 896			}
 897		}
 898		db.setTransactionSuccessful();
 899		db.endTransaction();
 900		account.setRosterVersion(roster.getVersion());
 901		updateAccount(account);
 902		long duration = SystemClock.elapsedRealtime() - start;
 903		Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": persisted roster in " + duration + "ms");
 904	}
 905
 906	public void deleteMessagesInConversation(Conversation conversation) {
 907		long start = SystemClock.elapsedRealtime();
 908		final SQLiteDatabase db = this.getWritableDatabase();
 909		db.beginTransaction();
 910		String[] args = {conversation.getUuid()};
 911		db.delete("messages_index", "uuid in (select uuid from messages where conversationUuid=?)", args);
 912		int num = db.delete(Message.TABLENAME, Message.CONVERSATION + "=?", args);
 913		db.setTransactionSuccessful();
 914		db.endTransaction();
 915		Log.d(Config.LOGTAG, "deleted " + num + " messages for " + conversation.getJid().asBareJid() + " in " + (SystemClock.elapsedRealtime() - start) + "ms");
 916	}
 917
 918	public void expireOldMessages(long timestamp) {
 919		final String[] args = {String.valueOf(timestamp)};
 920		SQLiteDatabase db = this.getReadableDatabase();
 921		db.beginTransaction();
 922		db.delete("messages_index", "uuid in (select uuid from messages where timeSent<?)", args);
 923		db.delete(Message.TABLENAME, "timeSent<?", args);
 924		db.setTransactionSuccessful();
 925		db.endTransaction();
 926	}
 927
 928	public MamReference getLastMessageReceived(Account account) {
 929		Cursor cursor = null;
 930		try {
 931			SQLiteDatabase db = this.getReadableDatabase();
 932			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";
 933			String[] args = {account.getUuid()};
 934			cursor = db.rawQuery(sql, args);
 935			if (cursor.getCount() == 0) {
 936				return null;
 937			} else {
 938				cursor.moveToFirst();
 939				return new MamReference(cursor.getLong(0), cursor.getString(1));
 940			}
 941		} catch (Exception e) {
 942			return null;
 943		} finally {
 944			if (cursor != null) {
 945				cursor.close();
 946			}
 947		}
 948	}
 949
 950	public long getLastTimeFingerprintUsed(Account account, String fingerprint) {
 951		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";
 952		String[] args = {account.getUuid(), fingerprint};
 953		Cursor cursor = getReadableDatabase().rawQuery(SQL, args);
 954		long time;
 955		if (cursor.moveToFirst()) {
 956			time = cursor.getLong(0);
 957		} else {
 958			time = 0;
 959		}
 960		cursor.close();
 961		return time;
 962	}
 963
 964	public MamReference getLastClearDate(Account account) {
 965		SQLiteDatabase db = this.getReadableDatabase();
 966		String[] columns = {Conversation.ATTRIBUTES};
 967		String selection = Conversation.ACCOUNT + "=?";
 968		String[] args = {account.getUuid()};
 969		Cursor cursor = db.query(Conversation.TABLENAME, columns, selection, args, null, null, null);
 970		MamReference maxClearDate = new MamReference(0);
 971		while (cursor.moveToNext()) {
 972			try {
 973				final JSONObject o = new JSONObject(cursor.getString(0));
 974				maxClearDate = MamReference.max(maxClearDate, MamReference.fromAttribute(o.getString(Conversation.ATTRIBUTE_LAST_CLEAR_HISTORY)));
 975			} catch (Exception e) {
 976				//ignored
 977			}
 978		}
 979		cursor.close();
 980		return maxClearDate;
 981	}
 982
 983	private Cursor getCursorForSession(Account account, SignalProtocolAddress contact) {
 984		final SQLiteDatabase db = this.getReadableDatabase();
 985		String[] selectionArgs = {account.getUuid(),
 986				contact.getName(),
 987				Integer.toString(contact.getDeviceId())};
 988		return db.query(SQLiteAxolotlStore.SESSION_TABLENAME,
 989				null,
 990				SQLiteAxolotlStore.ACCOUNT + " = ? AND "
 991						+ SQLiteAxolotlStore.NAME + " = ? AND "
 992						+ SQLiteAxolotlStore.DEVICE_ID + " = ? ",
 993				selectionArgs,
 994				null, null, null);
 995	}
 996
 997	public SessionRecord loadSession(Account account, SignalProtocolAddress contact) {
 998		SessionRecord session = null;
 999		Cursor cursor = getCursorForSession(account, contact);
1000		if (cursor.getCount() != 0) {
1001			cursor.moveToFirst();
1002			try {
1003				session = new SessionRecord(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT));
1004			} catch (IOException e) {
1005				cursor.close();
1006				throw new AssertionError(e);
1007			}
1008		}
1009		cursor.close();
1010		return session;
1011	}
1012
1013	public List<Integer> getSubDeviceSessions(Account account, SignalProtocolAddress contact) {
1014		final SQLiteDatabase db = this.getReadableDatabase();
1015		return getSubDeviceSessions(db, account, contact);
1016	}
1017
1018	private List<Integer> getSubDeviceSessions(SQLiteDatabase db, Account account, SignalProtocolAddress contact) {
1019		List<Integer> devices = new ArrayList<>();
1020		String[] columns = {SQLiteAxolotlStore.DEVICE_ID};
1021		String[] selectionArgs = {account.getUuid(),
1022				contact.getName()};
1023		Cursor cursor = db.query(SQLiteAxolotlStore.SESSION_TABLENAME,
1024				columns,
1025				SQLiteAxolotlStore.ACCOUNT + " = ? AND "
1026						+ SQLiteAxolotlStore.NAME + " = ?",
1027				selectionArgs,
1028				null, null, null);
1029
1030		while (cursor.moveToNext()) {
1031			devices.add(cursor.getInt(
1032					cursor.getColumnIndex(SQLiteAxolotlStore.DEVICE_ID)));
1033		}
1034
1035		cursor.close();
1036		return devices;
1037	}
1038
1039	public List<String> getKnownSignalAddresses(Account account) {
1040		List<String> addresses = new ArrayList<>();
1041		String[] colums = {"DISTINCT " + SQLiteAxolotlStore.NAME};
1042		String[] selectionArgs = {account.getUuid()};
1043		Cursor cursor = getReadableDatabase().query(SQLiteAxolotlStore.SESSION_TABLENAME,
1044				colums,
1045				SQLiteAxolotlStore.ACCOUNT + " = ?",
1046				selectionArgs,
1047				null, null, null
1048		);
1049		while (cursor.moveToNext()) {
1050			addresses.add(cursor.getString(0));
1051		}
1052		cursor.close();
1053		return addresses;
1054	}
1055
1056	public boolean containsSession(Account account, SignalProtocolAddress contact) {
1057		Cursor cursor = getCursorForSession(account, contact);
1058		int count = cursor.getCount();
1059		cursor.close();
1060		return count != 0;
1061	}
1062
1063	public void storeSession(Account account, SignalProtocolAddress contact, SessionRecord session) {
1064		SQLiteDatabase db = this.getWritableDatabase();
1065		ContentValues values = new ContentValues();
1066		values.put(SQLiteAxolotlStore.NAME, contact.getName());
1067		values.put(SQLiteAxolotlStore.DEVICE_ID, contact.getDeviceId());
1068		values.put(SQLiteAxolotlStore.KEY, Base64.encodeToString(session.serialize(), Base64.DEFAULT));
1069		values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
1070		db.insert(SQLiteAxolotlStore.SESSION_TABLENAME, null, values);
1071	}
1072
1073	public void deleteSession(Account account, SignalProtocolAddress contact) {
1074		SQLiteDatabase db = this.getWritableDatabase();
1075		deleteSession(db, account, contact);
1076	}
1077
1078	private void deleteSession(SQLiteDatabase db, Account account, SignalProtocolAddress contact) {
1079		String[] args = {account.getUuid(),
1080				contact.getName(),
1081				Integer.toString(contact.getDeviceId())};
1082		db.delete(SQLiteAxolotlStore.SESSION_TABLENAME,
1083				SQLiteAxolotlStore.ACCOUNT + " = ? AND "
1084						+ SQLiteAxolotlStore.NAME + " = ? AND "
1085						+ SQLiteAxolotlStore.DEVICE_ID + " = ? ",
1086				args);
1087	}
1088
1089	public void deleteAllSessions(Account account, SignalProtocolAddress contact) {
1090		SQLiteDatabase db = this.getWritableDatabase();
1091		String[] args = {account.getUuid(), contact.getName()};
1092		db.delete(SQLiteAxolotlStore.SESSION_TABLENAME,
1093				SQLiteAxolotlStore.ACCOUNT + "=? AND "
1094						+ SQLiteAxolotlStore.NAME + " = ?",
1095				args);
1096	}
1097
1098	private Cursor getCursorForPreKey(Account account, int preKeyId) {
1099		SQLiteDatabase db = this.getReadableDatabase();
1100		String[] columns = {SQLiteAxolotlStore.KEY};
1101		String[] selectionArgs = {account.getUuid(), Integer.toString(preKeyId)};
1102		Cursor cursor = db.query(SQLiteAxolotlStore.PREKEY_TABLENAME,
1103				columns,
1104				SQLiteAxolotlStore.ACCOUNT + "=? AND "
1105						+ SQLiteAxolotlStore.ID + "=?",
1106				selectionArgs,
1107				null, null, null);
1108
1109		return cursor;
1110	}
1111
1112	public PreKeyRecord loadPreKey(Account account, int preKeyId) {
1113		PreKeyRecord record = null;
1114		Cursor cursor = getCursorForPreKey(account, preKeyId);
1115		if (cursor.getCount() != 0) {
1116			cursor.moveToFirst();
1117			try {
1118				record = new PreKeyRecord(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT));
1119			} catch (IOException e) {
1120				throw new AssertionError(e);
1121			}
1122		}
1123		cursor.close();
1124		return record;
1125	}
1126
1127	public boolean containsPreKey(Account account, int preKeyId) {
1128		Cursor cursor = getCursorForPreKey(account, preKeyId);
1129		int count = cursor.getCount();
1130		cursor.close();
1131		return count != 0;
1132	}
1133
1134	public void storePreKey(Account account, PreKeyRecord record) {
1135		SQLiteDatabase db = this.getWritableDatabase();
1136		ContentValues values = new ContentValues();
1137		values.put(SQLiteAxolotlStore.ID, record.getId());
1138		values.put(SQLiteAxolotlStore.KEY, Base64.encodeToString(record.serialize(), Base64.DEFAULT));
1139		values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
1140		db.insert(SQLiteAxolotlStore.PREKEY_TABLENAME, null, values);
1141	}
1142
1143	public void deletePreKey(Account account, int preKeyId) {
1144		SQLiteDatabase db = this.getWritableDatabase();
1145		String[] args = {account.getUuid(), Integer.toString(preKeyId)};
1146		db.delete(SQLiteAxolotlStore.PREKEY_TABLENAME,
1147				SQLiteAxolotlStore.ACCOUNT + "=? AND "
1148						+ SQLiteAxolotlStore.ID + "=?",
1149				args);
1150	}
1151
1152	private Cursor getCursorForSignedPreKey(Account account, int signedPreKeyId) {
1153		SQLiteDatabase db = this.getReadableDatabase();
1154		String[] columns = {SQLiteAxolotlStore.KEY};
1155		String[] selectionArgs = {account.getUuid(), Integer.toString(signedPreKeyId)};
1156		Cursor cursor = db.query(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
1157				columns,
1158				SQLiteAxolotlStore.ACCOUNT + "=? AND " + SQLiteAxolotlStore.ID + "=?",
1159				selectionArgs,
1160				null, null, null);
1161
1162		return cursor;
1163	}
1164
1165	public SignedPreKeyRecord loadSignedPreKey(Account account, int signedPreKeyId) {
1166		SignedPreKeyRecord record = null;
1167		Cursor cursor = getCursorForSignedPreKey(account, signedPreKeyId);
1168		if (cursor.getCount() != 0) {
1169			cursor.moveToFirst();
1170			try {
1171				record = new SignedPreKeyRecord(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT));
1172			} catch (IOException e) {
1173				throw new AssertionError(e);
1174			}
1175		}
1176		cursor.close();
1177		return record;
1178	}
1179
1180	public List<SignedPreKeyRecord> loadSignedPreKeys(Account account) {
1181		List<SignedPreKeyRecord> prekeys = new ArrayList<>();
1182		SQLiteDatabase db = this.getReadableDatabase();
1183		String[] columns = {SQLiteAxolotlStore.KEY};
1184		String[] selectionArgs = {account.getUuid()};
1185		Cursor cursor = db.query(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
1186				columns,
1187				SQLiteAxolotlStore.ACCOUNT + "=?",
1188				selectionArgs,
1189				null, null, null);
1190
1191		while (cursor.moveToNext()) {
1192			try {
1193				prekeys.add(new SignedPreKeyRecord(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT)));
1194			} catch (IOException ignored) {
1195			}
1196		}
1197		cursor.close();
1198		return prekeys;
1199	}
1200
1201	public int getSignedPreKeysCount(Account account) {
1202		String[] columns = {"count(" + SQLiteAxolotlStore.KEY + ")"};
1203		String[] selectionArgs = {account.getUuid()};
1204		SQLiteDatabase db = this.getReadableDatabase();
1205		Cursor cursor = db.query(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
1206				columns,
1207				SQLiteAxolotlStore.ACCOUNT + "=?",
1208				selectionArgs,
1209				null, null, null);
1210		final int count;
1211		if (cursor.moveToFirst()) {
1212			count = cursor.getInt(0);
1213		} else {
1214			count = 0;
1215		}
1216		cursor.close();
1217		return count;
1218	}
1219
1220	public boolean containsSignedPreKey(Account account, int signedPreKeyId) {
1221		Cursor cursor = getCursorForPreKey(account, signedPreKeyId);
1222		int count = cursor.getCount();
1223		cursor.close();
1224		return count != 0;
1225	}
1226
1227	public void storeSignedPreKey(Account account, SignedPreKeyRecord record) {
1228		SQLiteDatabase db = this.getWritableDatabase();
1229		ContentValues values = new ContentValues();
1230		values.put(SQLiteAxolotlStore.ID, record.getId());
1231		values.put(SQLiteAxolotlStore.KEY, Base64.encodeToString(record.serialize(), Base64.DEFAULT));
1232		values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
1233		db.insert(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME, null, values);
1234	}
1235
1236	public void deleteSignedPreKey(Account account, int signedPreKeyId) {
1237		SQLiteDatabase db = this.getWritableDatabase();
1238		String[] args = {account.getUuid(), Integer.toString(signedPreKeyId)};
1239		db.delete(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
1240				SQLiteAxolotlStore.ACCOUNT + "=? AND "
1241						+ SQLiteAxolotlStore.ID + "=?",
1242				args);
1243	}
1244
1245	private Cursor getIdentityKeyCursor(Account account, String name, boolean own) {
1246		final SQLiteDatabase db = this.getReadableDatabase();
1247		return getIdentityKeyCursor(db, account, name, own);
1248	}
1249
1250	private Cursor getIdentityKeyCursor(SQLiteDatabase db, Account account, String name, boolean own) {
1251		return getIdentityKeyCursor(db, account, name, own, null);
1252	}
1253
1254	private Cursor getIdentityKeyCursor(Account account, String fingerprint) {
1255		final SQLiteDatabase db = this.getReadableDatabase();
1256		return getIdentityKeyCursor(db, account, fingerprint);
1257	}
1258
1259	private Cursor getIdentityKeyCursor(SQLiteDatabase db, Account account, String fingerprint) {
1260		return getIdentityKeyCursor(db, account, null, null, fingerprint);
1261	}
1262
1263	private Cursor getIdentityKeyCursor(SQLiteDatabase db, Account account, String name, Boolean own, String fingerprint) {
1264		String[] columns = {SQLiteAxolotlStore.TRUST,
1265				SQLiteAxolotlStore.ACTIVE,
1266				SQLiteAxolotlStore.LAST_ACTIVATION,
1267				SQLiteAxolotlStore.KEY};
1268		ArrayList<String> selectionArgs = new ArrayList<>(4);
1269		selectionArgs.add(account.getUuid());
1270		String selectionString = SQLiteAxolotlStore.ACCOUNT + " = ?";
1271		if (name != null) {
1272			selectionArgs.add(name);
1273			selectionString += " AND " + SQLiteAxolotlStore.NAME + " = ?";
1274		}
1275		if (fingerprint != null) {
1276			selectionArgs.add(fingerprint);
1277			selectionString += " AND " + SQLiteAxolotlStore.FINGERPRINT + " = ?";
1278		}
1279		if (own != null) {
1280			selectionArgs.add(own ? "1" : "0");
1281			selectionString += " AND " + SQLiteAxolotlStore.OWN + " = ?";
1282		}
1283		Cursor cursor = db.query(SQLiteAxolotlStore.IDENTITIES_TABLENAME,
1284				columns,
1285				selectionString,
1286				selectionArgs.toArray(new String[selectionArgs.size()]),
1287				null, null, null);
1288
1289		return cursor;
1290	}
1291
1292	public IdentityKeyPair loadOwnIdentityKeyPair(Account account) {
1293		SQLiteDatabase db = getReadableDatabase();
1294		return loadOwnIdentityKeyPair(db, account);
1295	}
1296
1297	private IdentityKeyPair loadOwnIdentityKeyPair(SQLiteDatabase db, Account account) {
1298		String name = account.getJid().asBareJid().toString();
1299		IdentityKeyPair identityKeyPair = null;
1300		Cursor cursor = getIdentityKeyCursor(db, account, name, true);
1301		if (cursor.getCount() != 0) {
1302			cursor.moveToFirst();
1303			try {
1304				identityKeyPair = new IdentityKeyPair(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT));
1305			} catch (InvalidKeyException e) {
1306				Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Encountered invalid IdentityKey in database for account" + account.getJid().asBareJid() + ", address: " + name);
1307			}
1308		}
1309		cursor.close();
1310
1311		return identityKeyPair;
1312	}
1313
1314	public Set<IdentityKey> loadIdentityKeys(Account account, String name) {
1315		return loadIdentityKeys(account, name, null);
1316	}
1317
1318	public Set<IdentityKey> loadIdentityKeys(Account account, String name, FingerprintStatus status) {
1319		Set<IdentityKey> identityKeys = new HashSet<>();
1320		Cursor cursor = getIdentityKeyCursor(account, name, false);
1321
1322		while (cursor.moveToNext()) {
1323			if (status != null && !FingerprintStatus.fromCursor(cursor).equals(status)) {
1324				continue;
1325			}
1326			try {
1327				String key = cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY));
1328				if (key != null) {
1329					identityKeys.add(new IdentityKey(Base64.decode(key, Base64.DEFAULT), 0));
1330				} else {
1331					Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Missing key (possibly preverified) in database for account" + account.getJid().asBareJid() + ", address: " + name);
1332				}
1333			} catch (InvalidKeyException e) {
1334				Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Encountered invalid IdentityKey in database for account" + account.getJid().asBareJid() + ", address: " + name);
1335			}
1336		}
1337		cursor.close();
1338
1339		return identityKeys;
1340	}
1341
1342	public long numTrustedKeys(Account account, String name) {
1343		SQLiteDatabase db = getReadableDatabase();
1344		String[] args = {
1345				account.getUuid(),
1346				name,
1347				FingerprintStatus.Trust.TRUSTED.toString(),
1348				FingerprintStatus.Trust.VERIFIED.toString(),
1349				FingerprintStatus.Trust.VERIFIED_X509.toString()
1350		};
1351		return DatabaseUtils.queryNumEntries(db, SQLiteAxolotlStore.IDENTITIES_TABLENAME,
1352				SQLiteAxolotlStore.ACCOUNT + " = ?"
1353						+ " AND " + SQLiteAxolotlStore.NAME + " = ?"
1354						+ " AND (" + SQLiteAxolotlStore.TRUST + " = ? OR " + SQLiteAxolotlStore.TRUST + " = ? OR " + SQLiteAxolotlStore.TRUST + " = ?)"
1355						+ " AND " + SQLiteAxolotlStore.ACTIVE + " > 0",
1356				args
1357		);
1358	}
1359
1360	private void storeIdentityKey(Account account, String name, boolean own, String fingerprint, String base64Serialized, FingerprintStatus status) {
1361		SQLiteDatabase db = this.getWritableDatabase();
1362		ContentValues values = new ContentValues();
1363		values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
1364		values.put(SQLiteAxolotlStore.NAME, name);
1365		values.put(SQLiteAxolotlStore.OWN, own ? 1 : 0);
1366		values.put(SQLiteAxolotlStore.FINGERPRINT, fingerprint);
1367		values.put(SQLiteAxolotlStore.KEY, base64Serialized);
1368		values.putAll(status.toContentValues());
1369		String where = SQLiteAxolotlStore.ACCOUNT + "=? AND " + SQLiteAxolotlStore.NAME + "=? AND " + SQLiteAxolotlStore.FINGERPRINT + " =?";
1370		String[] whereArgs = {account.getUuid(), name, fingerprint};
1371		int rows = db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, values, where, whereArgs);
1372		if (rows == 0) {
1373			db.insert(SQLiteAxolotlStore.IDENTITIES_TABLENAME, null, values);
1374		}
1375	}
1376
1377	public void storePreVerification(Account account, String name, String fingerprint, FingerprintStatus status) {
1378		SQLiteDatabase db = this.getWritableDatabase();
1379		ContentValues values = new ContentValues();
1380		values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
1381		values.put(SQLiteAxolotlStore.NAME, name);
1382		values.put(SQLiteAxolotlStore.OWN, 0);
1383		values.put(SQLiteAxolotlStore.FINGERPRINT, fingerprint);
1384		values.putAll(status.toContentValues());
1385		db.insert(SQLiteAxolotlStore.IDENTITIES_TABLENAME, null, values);
1386	}
1387
1388	public FingerprintStatus getFingerprintStatus(Account account, String fingerprint) {
1389		Cursor cursor = getIdentityKeyCursor(account, fingerprint);
1390		final FingerprintStatus status;
1391		if (cursor.getCount() > 0) {
1392			cursor.moveToFirst();
1393			status = FingerprintStatus.fromCursor(cursor);
1394		} else {
1395			status = null;
1396		}
1397		cursor.close();
1398		return status;
1399	}
1400
1401	public boolean setIdentityKeyTrust(Account account, String fingerprint, FingerprintStatus fingerprintStatus) {
1402		SQLiteDatabase db = this.getWritableDatabase();
1403		return setIdentityKeyTrust(db, account, fingerprint, fingerprintStatus);
1404	}
1405
1406	private boolean setIdentityKeyTrust(SQLiteDatabase db, Account account, String fingerprint, FingerprintStatus status) {
1407		String[] selectionArgs = {
1408				account.getUuid(),
1409				fingerprint
1410		};
1411		int rows = db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, status.toContentValues(),
1412				SQLiteAxolotlStore.ACCOUNT + " = ? AND "
1413						+ SQLiteAxolotlStore.FINGERPRINT + " = ? ",
1414				selectionArgs);
1415		return rows == 1;
1416	}
1417
1418	public boolean setIdentityKeyCertificate(Account account, String fingerprint, X509Certificate x509Certificate) {
1419		SQLiteDatabase db = this.getWritableDatabase();
1420		String[] selectionArgs = {
1421				account.getUuid(),
1422				fingerprint
1423		};
1424		try {
1425			ContentValues values = new ContentValues();
1426			values.put(SQLiteAxolotlStore.CERTIFICATE, x509Certificate.getEncoded());
1427			return db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, values,
1428					SQLiteAxolotlStore.ACCOUNT + " = ? AND "
1429							+ SQLiteAxolotlStore.FINGERPRINT + " = ? ",
1430					selectionArgs) == 1;
1431		} catch (CertificateEncodingException e) {
1432			Log.d(Config.LOGTAG, "could not encode certificate");
1433			return false;
1434		}
1435	}
1436
1437	public X509Certificate getIdentityKeyCertifcate(Account account, String fingerprint) {
1438		SQLiteDatabase db = this.getReadableDatabase();
1439		String[] selectionArgs = {
1440				account.getUuid(),
1441				fingerprint
1442		};
1443		String[] colums = {SQLiteAxolotlStore.CERTIFICATE};
1444		String selection = SQLiteAxolotlStore.ACCOUNT + " = ? AND " + SQLiteAxolotlStore.FINGERPRINT + " = ? ";
1445		Cursor cursor = db.query(SQLiteAxolotlStore.IDENTITIES_TABLENAME, colums, selection, selectionArgs, null, null, null);
1446		if (cursor.getCount() < 1) {
1447			return null;
1448		} else {
1449			cursor.moveToFirst();
1450			byte[] certificate = cursor.getBlob(cursor.getColumnIndex(SQLiteAxolotlStore.CERTIFICATE));
1451			cursor.close();
1452			if (certificate == null || certificate.length == 0) {
1453				return null;
1454			}
1455			try {
1456				CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
1457				return (X509Certificate) certificateFactory.generateCertificate(new ByteArrayInputStream(certificate));
1458			} catch (CertificateException e) {
1459				Log.d(Config.LOGTAG, "certificate exception " + e.getMessage());
1460				return null;
1461			}
1462		}
1463	}
1464
1465	public void storeIdentityKey(Account account, String name, IdentityKey identityKey, FingerprintStatus status) {
1466		storeIdentityKey(account, name, false, CryptoHelper.bytesToHex(identityKey.getPublicKey().serialize()), Base64.encodeToString(identityKey.serialize(), Base64.DEFAULT), status);
1467	}
1468
1469	public void storeOwnIdentityKeyPair(Account account, IdentityKeyPair identityKeyPair) {
1470		storeIdentityKey(account, account.getJid().asBareJid().toString(), true, CryptoHelper.bytesToHex(identityKeyPair.getPublicKey().serialize()), Base64.encodeToString(identityKeyPair.serialize(), Base64.DEFAULT), FingerprintStatus.createActiveVerified(false));
1471	}
1472
1473
1474	private void recreateAxolotlDb(SQLiteDatabase db) {
1475		Log.d(Config.LOGTAG, AxolotlService.LOGPREFIX + " : " + ">>> (RE)CREATING AXOLOTL DATABASE <<<");
1476		db.execSQL("DROP TABLE IF EXISTS " + SQLiteAxolotlStore.SESSION_TABLENAME);
1477		db.execSQL(CREATE_SESSIONS_STATEMENT);
1478		db.execSQL("DROP TABLE IF EXISTS " + SQLiteAxolotlStore.PREKEY_TABLENAME);
1479		db.execSQL(CREATE_PREKEYS_STATEMENT);
1480		db.execSQL("DROP TABLE IF EXISTS " + SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME);
1481		db.execSQL(CREATE_SIGNED_PREKEYS_STATEMENT);
1482		db.execSQL("DROP TABLE IF EXISTS " + SQLiteAxolotlStore.IDENTITIES_TABLENAME);
1483		db.execSQL(CREATE_IDENTITIES_STATEMENT);
1484	}
1485
1486	public void wipeAxolotlDb(Account account) {
1487		String accountName = account.getUuid();
1488		Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + ">>> WIPING AXOLOTL DATABASE FOR ACCOUNT " + accountName + " <<<");
1489		SQLiteDatabase db = this.getWritableDatabase();
1490		String[] deleteArgs = {
1491				accountName
1492		};
1493		db.delete(SQLiteAxolotlStore.SESSION_TABLENAME,
1494				SQLiteAxolotlStore.ACCOUNT + " = ?",
1495				deleteArgs);
1496		db.delete(SQLiteAxolotlStore.PREKEY_TABLENAME,
1497				SQLiteAxolotlStore.ACCOUNT + " = ?",
1498				deleteArgs);
1499		db.delete(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
1500				SQLiteAxolotlStore.ACCOUNT + " = ?",
1501				deleteArgs);
1502		db.delete(SQLiteAxolotlStore.IDENTITIES_TABLENAME,
1503				SQLiteAxolotlStore.ACCOUNT + " = ?",
1504				deleteArgs);
1505	}
1506
1507	public List<ShortcutService.FrequentContact> getFrequentContacts(int days) {
1508		SQLiteDatabase db = this.getReadableDatabase();
1509		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;";
1510		String[] whereArgs = new String[]{String.valueOf(System.currentTimeMillis() - (Config.MILLISECONDS_IN_DAY * days))};
1511		Cursor cursor = db.rawQuery(SQL, whereArgs);
1512		ArrayList<ShortcutService.FrequentContact> contacts = new ArrayList<>();
1513		while (cursor.moveToNext()) {
1514			try {
1515				contacts.add(new ShortcutService.FrequentContact(cursor.getString(0), Jid.of(cursor.getString(1))));
1516			} catch (Exception e) {
1517				Log.d(Config.LOGTAG, e.getMessage());
1518			}
1519		}
1520		cursor.close();
1521		return contacts;
1522	}
1523}