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.SQLiteCantOpenDatabaseException;
   8import android.database.sqlite.SQLiteDatabase;
   9import android.database.sqlite.SQLiteOpenHelper;
  10import android.util.Base64;
  11import android.util.Log;
  12import android.util.Pair;
  13
  14import org.whispersystems.libaxolotl.AxolotlAddress;
  15import org.whispersystems.libaxolotl.IdentityKey;
  16import org.whispersystems.libaxolotl.IdentityKeyPair;
  17import org.whispersystems.libaxolotl.InvalidKeyException;
  18import org.whispersystems.libaxolotl.state.PreKeyRecord;
  19import org.whispersystems.libaxolotl.state.SessionRecord;
  20import org.whispersystems.libaxolotl.state.SignedPreKeyRecord;
  21
  22import java.io.ByteArrayInputStream;
  23import java.io.IOException;
  24import java.security.cert.CertificateEncodingException;
  25import java.security.cert.CertificateException;
  26import java.security.cert.CertificateFactory;
  27import java.security.cert.X509Certificate;
  28import java.util.ArrayList;
  29import java.util.HashSet;
  30import java.util.Iterator;
  31import java.util.List;
  32import java.util.Set;
  33import java.util.concurrent.CopyOnWriteArrayList;
  34import org.json.JSONException;
  35
  36import eu.siacs.conversations.Config;
  37import eu.siacs.conversations.crypto.axolotl.AxolotlService;
  38import eu.siacs.conversations.crypto.axolotl.SQLiteAxolotlStore;
  39import eu.siacs.conversations.crypto.axolotl.XmppAxolotlSession;
  40import eu.siacs.conversations.entities.Account;
  41import eu.siacs.conversations.entities.Contact;
  42import eu.siacs.conversations.entities.Conversation;
  43import eu.siacs.conversations.entities.Message;
  44import eu.siacs.conversations.entities.Roster;
  45import eu.siacs.conversations.entities.ServiceDiscoveryResult;
  46import eu.siacs.conversations.xmpp.jid.InvalidJidException;
  47import eu.siacs.conversations.xmpp.jid.Jid;
  48
  49public class DatabaseBackend extends SQLiteOpenHelper {
  50
  51	private static DatabaseBackend instance = null;
  52
  53	private static final String DATABASE_NAME = "history";
  54	private static final int DATABASE_VERSION = 25;
  55
  56	private static String CREATE_CONTATCS_STATEMENT = "create table "
  57			+ Contact.TABLENAME + "(" + Contact.ACCOUNT + " TEXT, "
  58			+ Contact.SERVERNAME + " TEXT, " + Contact.SYSTEMNAME + " TEXT,"
  59			+ Contact.JID + " TEXT," + Contact.KEYS + " TEXT,"
  60			+ Contact.PHOTOURI + " TEXT," + Contact.OPTIONS + " NUMBER,"
  61			+ Contact.SYSTEMACCOUNT + " NUMBER, " + Contact.AVATAR + " TEXT, "
  62			+ Contact.LAST_PRESENCE + " TEXT, " + Contact.LAST_TIME + " NUMBER, "
  63			+ Contact.GROUPS + " TEXT, FOREIGN KEY(" + Contact.ACCOUNT + ") REFERENCES "
  64			+ Account.TABLENAME + "(" + Account.UUID
  65			+ ") ON DELETE CASCADE, UNIQUE(" + Contact.ACCOUNT + ", "
  66			+ Contact.JID + ") ON CONFLICT REPLACE);";
  67
  68	private static String CREATE_DISCOVERY_RESULTS_STATEMENT = "create table "
  69			+ ServiceDiscoveryResult.TABLENAME + "("
  70			+ ServiceDiscoveryResult.HASH + " TEXT, "
  71			+ ServiceDiscoveryResult.VER + " TEXT, "
  72			+ ServiceDiscoveryResult.RESULT + " TEXT, "
  73			+ "UNIQUE(" + ServiceDiscoveryResult.HASH + ", "
  74			+ ServiceDiscoveryResult.VER + ") ON CONFLICT REPLACE);";
  75
  76	private static String CREATE_PREKEYS_STATEMENT = "CREATE TABLE "
  77			+ SQLiteAxolotlStore.PREKEY_TABLENAME + "("
  78			+ SQLiteAxolotlStore.ACCOUNT + " TEXT,  "
  79			+ SQLiteAxolotlStore.ID + " INTEGER, "
  80			+ SQLiteAxolotlStore.KEY + " TEXT, FOREIGN KEY("
  81			+ SQLiteAxolotlStore.ACCOUNT
  82			+ ") REFERENCES " + Account.TABLENAME + "(" + Account.UUID + ") ON DELETE CASCADE, "
  83			+ "UNIQUE( " + SQLiteAxolotlStore.ACCOUNT + ", "
  84			+ SQLiteAxolotlStore.ID
  85			+ ") ON CONFLICT REPLACE"
  86			+ ");";
  87
  88	private static String CREATE_SIGNED_PREKEYS_STATEMENT = "CREATE TABLE "
  89			+ SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME + "("
  90			+ SQLiteAxolotlStore.ACCOUNT + " TEXT,  "
  91			+ SQLiteAxolotlStore.ID + " INTEGER, "
  92			+ SQLiteAxolotlStore.KEY + " TEXT, FOREIGN KEY("
  93			+ SQLiteAxolotlStore.ACCOUNT
  94			+ ") REFERENCES " + Account.TABLENAME + "(" + Account.UUID + ") ON DELETE CASCADE, "
  95			+ "UNIQUE( " + SQLiteAxolotlStore.ACCOUNT + ", "
  96			+ SQLiteAxolotlStore.ID
  97			+ ") ON CONFLICT REPLACE" +
  98			");";
  99
 100	private static String CREATE_SESSIONS_STATEMENT = "CREATE TABLE "
 101			+ SQLiteAxolotlStore.SESSION_TABLENAME + "("
 102			+ SQLiteAxolotlStore.ACCOUNT + " TEXT,  "
 103			+ SQLiteAxolotlStore.NAME + " TEXT, "
 104			+ SQLiteAxolotlStore.DEVICE_ID + " INTEGER, "
 105			+ SQLiteAxolotlStore.KEY + " TEXT, FOREIGN KEY("
 106			+ SQLiteAxolotlStore.ACCOUNT
 107			+ ") REFERENCES " + Account.TABLENAME + "(" + Account.UUID + ") ON DELETE CASCADE, "
 108			+ "UNIQUE( " + SQLiteAxolotlStore.ACCOUNT + ", "
 109			+ SQLiteAxolotlStore.NAME + ", "
 110			+ SQLiteAxolotlStore.DEVICE_ID
 111			+ ") ON CONFLICT REPLACE"
 112			+ ");";
 113
 114	private static String CREATE_IDENTITIES_STATEMENT = "CREATE TABLE "
 115			+ SQLiteAxolotlStore.IDENTITIES_TABLENAME + "("
 116			+ SQLiteAxolotlStore.ACCOUNT + " TEXT,  "
 117			+ SQLiteAxolotlStore.NAME + " TEXT, "
 118			+ SQLiteAxolotlStore.OWN + " INTEGER, "
 119			+ SQLiteAxolotlStore.FINGERPRINT + " TEXT, "
 120			+ SQLiteAxolotlStore.CERTIFICATE + " BLOB, "
 121			+ SQLiteAxolotlStore.TRUSTED + " 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.NAME + ", "
 127			+ SQLiteAxolotlStore.FINGERPRINT
 128			+ ") ON CONFLICT IGNORE"
 129			+ ");";
 130
 131	private DatabaseBackend(Context context) {
 132		super(context, DATABASE_NAME, null, DATABASE_VERSION);
 133	}
 134
 135	@Override
 136	public void onCreate(SQLiteDatabase db) {
 137		db.execSQL("PRAGMA foreign_keys=ON;");
 138		db.execSQL("create table " + Account.TABLENAME + "(" + Account.UUID
 139				+ " TEXT PRIMARY KEY," + Account.USERNAME + " TEXT,"
 140				+ Account.SERVER + " TEXT," + Account.PASSWORD + " TEXT,"
 141				+ Account.DISPLAY_NAME + " TEXT, "
 142				+ Account.ROSTERVERSION + " TEXT," + Account.OPTIONS
 143				+ " NUMBER, " + Account.AVATAR + " TEXT, " + Account.KEYS
 144				+ " TEXT, " + Account.HOSTNAME + " TEXT, " + Account.PORT + " NUMBER DEFAULT 5222)");
 145		db.execSQL("create table " + Conversation.TABLENAME + " ("
 146				+ Conversation.UUID + " TEXT PRIMARY KEY, " + Conversation.NAME
 147				+ " TEXT, " + Conversation.CONTACT + " TEXT, "
 148				+ Conversation.ACCOUNT + " TEXT, " + Conversation.CONTACTJID
 149				+ " TEXT, " + Conversation.CREATED + " NUMBER, "
 150				+ Conversation.STATUS + " NUMBER, " + Conversation.MODE
 151				+ " NUMBER, " + Conversation.ATTRIBUTES + " TEXT, FOREIGN KEY("
 152				+ Conversation.ACCOUNT + ") REFERENCES " + Account.TABLENAME
 153				+ "(" + Account.UUID + ") ON DELETE CASCADE);");
 154		db.execSQL("create table " + Message.TABLENAME + "( " + Message.UUID
 155				+ " TEXT PRIMARY KEY, " + Message.CONVERSATION + " TEXT, "
 156				+ Message.TIME_SENT + " NUMBER, " + Message.COUNTERPART
 157				+ " TEXT, " + Message.TRUE_COUNTERPART + " TEXT,"
 158				+ Message.BODY + " TEXT, " + Message.ENCRYPTION + " NUMBER, "
 159				+ Message.STATUS + " NUMBER," + Message.TYPE + " NUMBER, "
 160				+ Message.RELATIVE_FILE_PATH + " TEXT, "
 161				+ Message.SERVER_MSG_ID + " TEXT, "
 162				+ Message.FINGERPRINT + " TEXT, "
 163				+ Message.CARBON + " INTEGER, "
 164				+ Message.EDITED + " TEXT, "
 165				+ Message.READ + " NUMBER DEFAULT 1, "
 166				+ Message.OOB + " INTEGER, "
 167				+ Message.REMOTE_MSG_ID + " TEXT, FOREIGN KEY("
 168				+ Message.CONVERSATION + ") REFERENCES "
 169				+ Conversation.TABLENAME + "(" + Conversation.UUID
 170				+ ") ON DELETE CASCADE);");
 171
 172		db.execSQL(CREATE_CONTATCS_STATEMENT);
 173		db.execSQL(CREATE_DISCOVERY_RESULTS_STATEMENT);
 174		db.execSQL(CREATE_SESSIONS_STATEMENT);
 175		db.execSQL(CREATE_PREKEYS_STATEMENT);
 176		db.execSQL(CREATE_SIGNED_PREKEYS_STATEMENT);
 177		db.execSQL(CREATE_IDENTITIES_STATEMENT);
 178	}
 179
 180	@Override
 181	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
 182		if (oldVersion < 2 && newVersion >= 2) {
 183			db.execSQL("update " + Account.TABLENAME + " set "
 184					+ Account.OPTIONS + " = " + Account.OPTIONS + " | 8");
 185		}
 186		if (oldVersion < 3 && newVersion >= 3) {
 187			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 188					+ Message.TYPE + " NUMBER");
 189		}
 190		if (oldVersion < 5 && newVersion >= 5) {
 191			db.execSQL("DROP TABLE " + Contact.TABLENAME);
 192			db.execSQL(CREATE_CONTATCS_STATEMENT);
 193			db.execSQL("UPDATE " + Account.TABLENAME + " SET "
 194					+ Account.ROSTERVERSION + " = NULL");
 195		}
 196		if (oldVersion < 6 && newVersion >= 6) {
 197			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 198					+ Message.TRUE_COUNTERPART + " TEXT");
 199		}
 200		if (oldVersion < 7 && newVersion >= 7) {
 201			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 202					+ Message.REMOTE_MSG_ID + " TEXT");
 203			db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
 204					+ Contact.AVATAR + " TEXT");
 205			db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN "
 206					+ Account.AVATAR + " TEXT");
 207		}
 208		if (oldVersion < 8 && newVersion >= 8) {
 209			db.execSQL("ALTER TABLE " + Conversation.TABLENAME + " ADD COLUMN "
 210					+ Conversation.ATTRIBUTES + " TEXT");
 211		}
 212		if (oldVersion < 9 && newVersion >= 9) {
 213			db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
 214					+ Contact.LAST_TIME + " NUMBER");
 215			db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
 216					+ Contact.LAST_PRESENCE + " TEXT");
 217		}
 218		if (oldVersion < 10 && newVersion >= 10) {
 219			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 220					+ Message.RELATIVE_FILE_PATH + " TEXT");
 221		}
 222		if (oldVersion < 11 && newVersion >= 11) {
 223			db.execSQL("ALTER TABLE " + Contact.TABLENAME + " ADD COLUMN "
 224					+ Contact.GROUPS + " TEXT");
 225			db.execSQL("delete from " + Contact.TABLENAME);
 226			db.execSQL("update " + Account.TABLENAME + " set " + Account.ROSTERVERSION + " = NULL");
 227		}
 228		if (oldVersion < 12 && newVersion >= 12) {
 229			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 230					+ Message.SERVER_MSG_ID + " TEXT");
 231		}
 232		if (oldVersion < 13 && newVersion >= 13) {
 233			db.execSQL("delete from " + Contact.TABLENAME);
 234			db.execSQL("update " + Account.TABLENAME + " set " + Account.ROSTERVERSION + " = NULL");
 235		}
 236		if (oldVersion < 14 && newVersion >= 14) {
 237			// migrate db to new, canonicalized JID domainpart representation
 238
 239			// Conversation table
 240			Cursor cursor = db.rawQuery("select * from " + Conversation.TABLENAME, new String[0]);
 241			while (cursor.moveToNext()) {
 242				String newJid;
 243				try {
 244					newJid = Jid.fromString(
 245							cursor.getString(cursor.getColumnIndex(Conversation.CONTACTJID))
 246					).toString();
 247				} catch (InvalidJidException ignored) {
 248					Log.e(Config.LOGTAG, "Failed to migrate Conversation CONTACTJID "
 249							+ cursor.getString(cursor.getColumnIndex(Conversation.CONTACTJID))
 250							+ ": " + ignored + ". Skipping...");
 251					continue;
 252				}
 253
 254				String updateArgs[] = {
 255						newJid,
 256						cursor.getString(cursor.getColumnIndex(Conversation.UUID)),
 257				};
 258				db.execSQL("update " + Conversation.TABLENAME
 259						+ " set " + Conversation.CONTACTJID + " = ? "
 260						+ " where " + Conversation.UUID + " = ?", updateArgs);
 261			}
 262			cursor.close();
 263
 264			// Contact table
 265			cursor = db.rawQuery("select * from " + Contact.TABLENAME, new String[0]);
 266			while (cursor.moveToNext()) {
 267				String newJid;
 268				try {
 269					newJid = Jid.fromString(
 270							cursor.getString(cursor.getColumnIndex(Contact.JID))
 271					).toString();
 272				} catch (InvalidJidException ignored) {
 273					Log.e(Config.LOGTAG, "Failed to migrate Contact JID "
 274							+ cursor.getString(cursor.getColumnIndex(Contact.JID))
 275							+ ": " + ignored + ". Skipping...");
 276					continue;
 277				}
 278
 279				String updateArgs[] = {
 280						newJid,
 281						cursor.getString(cursor.getColumnIndex(Contact.ACCOUNT)),
 282						cursor.getString(cursor.getColumnIndex(Contact.JID)),
 283				};
 284				db.execSQL("update " + Contact.TABLENAME
 285						+ " set " + Contact.JID + " = ? "
 286						+ " where " + Contact.ACCOUNT + " = ? "
 287						+ " AND " + Contact.JID + " = ?", updateArgs);
 288			}
 289			cursor.close();
 290
 291			// Account table
 292			cursor = db.rawQuery("select * from " + Account.TABLENAME, new String[0]);
 293			while (cursor.moveToNext()) {
 294				String newServer;
 295				try {
 296					newServer = Jid.fromParts(
 297							cursor.getString(cursor.getColumnIndex(Account.USERNAME)),
 298							cursor.getString(cursor.getColumnIndex(Account.SERVER)),
 299							"mobile"
 300					).getDomainpart();
 301				} catch (InvalidJidException ignored) {
 302					Log.e(Config.LOGTAG, "Failed to migrate Account SERVER "
 303							+ cursor.getString(cursor.getColumnIndex(Account.SERVER))
 304							+ ": " + ignored + ". Skipping...");
 305					continue;
 306				}
 307
 308				String updateArgs[] = {
 309						newServer,
 310						cursor.getString(cursor.getColumnIndex(Account.UUID)),
 311				};
 312				db.execSQL("update " + Account.TABLENAME
 313						+ " set " + Account.SERVER + " = ? "
 314						+ " where " + Account.UUID + " = ?", updateArgs);
 315			}
 316			cursor.close();
 317		}
 318		if (oldVersion < 15 && newVersion >= 15) {
 319			recreateAxolotlDb(db);
 320			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 321					+ Message.FINGERPRINT + " TEXT");
 322		}
 323		if (oldVersion < 16 && newVersion >= 16) {
 324			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN "
 325					+ Message.CARBON + " INTEGER");
 326		}
 327		if (oldVersion < 19 && newVersion >= 19) {
 328			db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.DISPLAY_NAME + " TEXT");
 329		}
 330		if (oldVersion < 20 && newVersion >= 20) {
 331			db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.HOSTNAME + " TEXT");
 332			db.execSQL("ALTER TABLE " + Account.TABLENAME + " ADD COLUMN " + Account.PORT + " NUMBER DEFAULT 5222");
 333		}
 334		/* Any migrations that alter the Account table need to happen BEFORE this migration, as it
 335		 * depends on account de-serialization.
 336		 */
 337		if (oldVersion < 17 && newVersion >= 17) {
 338			List<Account> accounts = getAccounts(db);
 339			for (Account account : accounts) {
 340				String ownDeviceIdString = account.getKey(SQLiteAxolotlStore.JSONKEY_REGISTRATION_ID);
 341				if (ownDeviceIdString == null) {
 342					continue;
 343				}
 344				int ownDeviceId = Integer.valueOf(ownDeviceIdString);
 345				AxolotlAddress ownAddress = new AxolotlAddress(account.getJid().toBareJid().toString(), ownDeviceId);
 346				deleteSession(db, account, ownAddress);
 347				IdentityKeyPair identityKeyPair = loadOwnIdentityKeyPair(db, account);
 348				if (identityKeyPair != null) {
 349					setIdentityKeyTrust(db, account, identityKeyPair.getPublicKey().getFingerprint().replaceAll("\\s", ""), XmppAxolotlSession.Trust.TRUSTED);
 350				} else {
 351					Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not load own identity key pair");
 352				}
 353			}
 354		}
 355		if (oldVersion < 18 && newVersion >= 18) {
 356			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.READ + " NUMBER DEFAULT 1");
 357		}
 358
 359		if (oldVersion < 21 && newVersion >= 21) {
 360			List<Account> accounts = getAccounts(db);
 361			for (Account account : accounts) {
 362				account.unsetPgpSignature();
 363				db.update(Account.TABLENAME, account.getContentValues(), Account.UUID
 364						+ "=?", new String[]{account.getUuid()});
 365			}
 366		}
 367
 368		if (oldVersion < 22 && newVersion >= 22) {
 369			db.execSQL("ALTER TABLE " + SQLiteAxolotlStore.IDENTITIES_TABLENAME + " ADD COLUMN " + SQLiteAxolotlStore.CERTIFICATE);
 370		}
 371
 372		if (oldVersion < 23 && newVersion >= 23) {
 373			db.execSQL(CREATE_DISCOVERY_RESULTS_STATEMENT);
 374		}
 375
 376		if (oldVersion < 24 && newVersion >= 24) {
 377			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.EDITED + " TEXT");
 378		}
 379
 380		if (oldVersion < 25 && newVersion >= 25) {
 381			db.execSQL("ALTER TABLE " + Message.TABLENAME + " ADD COLUMN " + Message.OOB + " INTEGER");
 382		}
 383	}
 384
 385	public static synchronized DatabaseBackend getInstance(Context context) {
 386		if (instance == null) {
 387			instance = new DatabaseBackend(context);
 388		}
 389		return instance;
 390	}
 391
 392	public void createConversation(Conversation conversation) {
 393		SQLiteDatabase db = this.getWritableDatabase();
 394		db.insert(Conversation.TABLENAME, null, conversation.getContentValues());
 395	}
 396
 397	public void createMessage(Message message) {
 398		SQLiteDatabase db = this.getWritableDatabase();
 399		db.insert(Message.TABLENAME, null, message.getContentValues());
 400	}
 401
 402	public void createAccount(Account account) {
 403		SQLiteDatabase db = this.getWritableDatabase();
 404		db.insert(Account.TABLENAME, null, account.getContentValues());
 405	}
 406
 407	public void insertDiscoveryResult(ServiceDiscoveryResult result) {
 408		SQLiteDatabase db = this.getWritableDatabase();
 409		db.insert(ServiceDiscoveryResult.TABLENAME, null, result.getContentValues());
 410	}
 411
 412	public ServiceDiscoveryResult findDiscoveryResult(final String hash, final String ver) {
 413		SQLiteDatabase db = this.getReadableDatabase();
 414		String[] selectionArgs = {hash, ver};
 415		Cursor cursor = db.query(ServiceDiscoveryResult.TABLENAME, null,
 416				ServiceDiscoveryResult.HASH + "=? AND " + ServiceDiscoveryResult.VER + "=?",
 417				selectionArgs, null, null, null);
 418		if (cursor.getCount() == 0) {
 419			cursor.close();
 420			return null;
 421		}
 422		cursor.moveToFirst();
 423
 424		ServiceDiscoveryResult result = null;
 425		try {
 426			result = new ServiceDiscoveryResult(cursor);
 427		} catch (JSONException e) { /* result is still null */ }
 428
 429		cursor.close();
 430		return result;
 431	}
 432
 433	public CopyOnWriteArrayList<Conversation> getConversations(int status) {
 434		CopyOnWriteArrayList<Conversation> list = new CopyOnWriteArrayList<>();
 435		SQLiteDatabase db = this.getReadableDatabase();
 436		String[] selectionArgs = {Integer.toString(status)};
 437		Cursor cursor = db.rawQuery("select * from " + Conversation.TABLENAME
 438				+ " where " + Conversation.STATUS + " = ? order by "
 439				+ Conversation.CREATED + " desc", selectionArgs);
 440		while (cursor.moveToNext()) {
 441			list.add(Conversation.fromCursor(cursor));
 442		}
 443		cursor.close();
 444		return list;
 445	}
 446
 447	public ArrayList<Message> getMessages(Conversation conversations, int limit) {
 448		return getMessages(conversations, limit, -1);
 449	}
 450
 451	public ArrayList<Message> getMessages(Conversation conversation, int limit,
 452										  long timestamp) {
 453		ArrayList<Message> list = new ArrayList<>();
 454		SQLiteDatabase db = this.getReadableDatabase();
 455		Cursor cursor;
 456		if (timestamp == -1) {
 457			String[] selectionArgs = {conversation.getUuid()};
 458			cursor = db.query(Message.TABLENAME, null, Message.CONVERSATION
 459					+ "=?", selectionArgs, null, null, Message.TIME_SENT
 460					+ " DESC", String.valueOf(limit));
 461		} else {
 462			String[] selectionArgs = {conversation.getUuid(),
 463					Long.toString(timestamp)};
 464			cursor = db.query(Message.TABLENAME, null, Message.CONVERSATION
 465							+ "=? and " + Message.TIME_SENT + "<?", selectionArgs,
 466					null, null, Message.TIME_SENT + " DESC",
 467					String.valueOf(limit));
 468		}
 469		if (cursor.getCount() > 0) {
 470			cursor.moveToLast();
 471			do {
 472				Message message = Message.fromCursor(cursor);
 473				message.setConversation(conversation);
 474				list.add(message);
 475			} while (cursor.moveToPrevious());
 476		}
 477		cursor.close();
 478		return list;
 479	}
 480
 481	public Iterable<Message> getMessagesIterable(final Conversation conversation) {
 482		return new Iterable<Message>() {
 483			@Override
 484			public Iterator<Message> iterator() {
 485				class MessageIterator implements Iterator<Message> {
 486					SQLiteDatabase db = getReadableDatabase();
 487					String[] selectionArgs = {conversation.getUuid()};
 488					Cursor cursor = db.query(Message.TABLENAME, null, Message.CONVERSATION
 489							+ "=?", selectionArgs, null, null, Message.TIME_SENT
 490							+ " ASC", null);
 491
 492					public MessageIterator() {
 493						cursor.moveToFirst();
 494					}
 495
 496					@Override
 497					public boolean hasNext() {
 498						return !cursor.isAfterLast();
 499					}
 500
 501					@Override
 502					public Message next() {
 503						Message message = Message.fromCursor(cursor);
 504						cursor.moveToNext();
 505						return message;
 506					}
 507
 508					@Override
 509					public void remove() {
 510						throw new UnsupportedOperationException();
 511					}
 512				}
 513				return new MessageIterator();
 514			}
 515		};
 516	}
 517
 518	public Conversation findConversation(final Account account, final Jid contactJid) {
 519		SQLiteDatabase db = this.getReadableDatabase();
 520		String[] selectionArgs = {account.getUuid(),
 521				contactJid.toBareJid().toString() + "/%",
 522				contactJid.toBareJid().toString()
 523		};
 524		Cursor cursor = db.query(Conversation.TABLENAME, null,
 525				Conversation.ACCOUNT + "=? AND (" + Conversation.CONTACTJID
 526						+ " like ? OR " + Conversation.CONTACTJID + "=?)", selectionArgs, null, null, null);
 527		if (cursor.getCount() == 0)
 528			return null;
 529		cursor.moveToFirst();
 530		Conversation conversation = Conversation.fromCursor(cursor);
 531		cursor.close();
 532		return conversation;
 533	}
 534
 535	public void updateConversation(final Conversation conversation) {
 536		final SQLiteDatabase db = this.getWritableDatabase();
 537		final String[] args = {conversation.getUuid()};
 538		db.update(Conversation.TABLENAME, conversation.getContentValues(),
 539				Conversation.UUID + "=?", args);
 540	}
 541
 542	public List<Account> getAccounts() {
 543		SQLiteDatabase db = this.getReadableDatabase();
 544		return getAccounts(db);
 545	}
 546
 547	private List<Account> getAccounts(SQLiteDatabase db) {
 548		List<Account> list = new ArrayList<>();
 549		Cursor cursor = db.query(Account.TABLENAME, null, null, null, null,
 550				null, null);
 551		while (cursor.moveToNext()) {
 552			list.add(Account.fromCursor(cursor));
 553		}
 554		cursor.close();
 555		return list;
 556	}
 557
 558	public void updateAccount(Account account) {
 559		SQLiteDatabase db = this.getWritableDatabase();
 560		String[] args = {account.getUuid()};
 561		db.update(Account.TABLENAME, account.getContentValues(), Account.UUID
 562				+ "=?", args);
 563	}
 564
 565	public void deleteAccount(Account account) {
 566		SQLiteDatabase db = this.getWritableDatabase();
 567		String[] args = {account.getUuid()};
 568		db.delete(Account.TABLENAME, Account.UUID + "=?", args);
 569	}
 570
 571	public boolean hasEnabledAccounts() {
 572		SQLiteDatabase db = this.getReadableDatabase();
 573		Cursor cursor = db.rawQuery("select count(" + Account.UUID + ")  from "
 574				+ Account.TABLENAME + " where not options & (1 <<1)", null);
 575		try {
 576			cursor.moveToFirst();
 577			int count = cursor.getInt(0);
 578			cursor.close();
 579			return (count > 0);
 580		} catch (SQLiteCantOpenDatabaseException e) {
 581			return true; // better safe than sorry
 582		} catch (RuntimeException e) {
 583			return true; // better safe than sorry
 584		}
 585	}
 586
 587	@Override
 588	public SQLiteDatabase getWritableDatabase() {
 589		SQLiteDatabase db = super.getWritableDatabase();
 590		db.execSQL("PRAGMA foreign_keys=ON;");
 591		return db;
 592	}
 593
 594	public void updateMessage(Message message) {
 595		SQLiteDatabase db = this.getWritableDatabase();
 596		String[] args = {message.getUuid()};
 597		db.update(Message.TABLENAME, message.getContentValues(), Message.UUID
 598				+ "=?", args);
 599	}
 600
 601	public void updateMessage(Message message, String uuid) {
 602		SQLiteDatabase db = this.getWritableDatabase();
 603		String[] args = {uuid};
 604		db.update(Message.TABLENAME, message.getContentValues(), Message.UUID
 605				+ "=?", args);
 606	}
 607
 608	public void readRoster(Roster roster) {
 609		SQLiteDatabase db = this.getReadableDatabase();
 610		Cursor cursor;
 611		String args[] = {roster.getAccount().getUuid()};
 612		cursor = db.query(Contact.TABLENAME, null, Contact.ACCOUNT + "=?", args, null, null, null);
 613		while (cursor.moveToNext()) {
 614			roster.initContact(Contact.fromCursor(cursor));
 615		}
 616		cursor.close();
 617	}
 618
 619	public void writeRoster(final Roster roster) {
 620		final Account account = roster.getAccount();
 621		final SQLiteDatabase db = this.getWritableDatabase();
 622		db.beginTransaction();
 623		for (Contact contact : roster.getContacts()) {
 624			if (contact.getOption(Contact.Options.IN_ROSTER)) {
 625				db.insert(Contact.TABLENAME, null, contact.getContentValues());
 626			} else {
 627				String where = Contact.ACCOUNT + "=? AND " + Contact.JID + "=?";
 628				String[] whereArgs = {account.getUuid(), contact.getJid().toString()};
 629				db.delete(Contact.TABLENAME, where, whereArgs);
 630			}
 631		}
 632		db.setTransactionSuccessful();
 633		db.endTransaction();
 634		account.setRosterVersion(roster.getVersion());
 635		updateAccount(account);
 636	}
 637
 638	public void deleteMessagesInConversation(Conversation conversation) {
 639		SQLiteDatabase db = this.getWritableDatabase();
 640		String[] args = {conversation.getUuid()};
 641		db.delete(Message.TABLENAME, Message.CONVERSATION + "=?", args);
 642	}
 643
 644	public Pair<Long, String> getLastMessageReceived(Account account) {
 645		try {
 646			SQLiteDatabase db = this.getReadableDatabase();
 647			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) order by messages.timesent desc limit 1";
 648			String[] args = {account.getUuid()};
 649			Cursor cursor = db.rawQuery(sql, args);
 650			if (cursor.getCount() == 0) {
 651				return null;
 652			} else {
 653				cursor.moveToFirst();
 654				return new Pair<>(cursor.getLong(0), cursor.getString(1));
 655			}
 656		} catch (Exception e) {
 657			return null;
 658		}
 659	}
 660
 661	private Cursor getCursorForSession(Account account, AxolotlAddress contact) {
 662		final SQLiteDatabase db = this.getReadableDatabase();
 663		String[] columns = null;
 664		String[] selectionArgs = {account.getUuid(),
 665				contact.getName(),
 666				Integer.toString(contact.getDeviceId())};
 667		Cursor cursor = db.query(SQLiteAxolotlStore.SESSION_TABLENAME,
 668				columns,
 669				SQLiteAxolotlStore.ACCOUNT + " = ? AND "
 670						+ SQLiteAxolotlStore.NAME + " = ? AND "
 671						+ SQLiteAxolotlStore.DEVICE_ID + " = ? ",
 672				selectionArgs,
 673				null, null, null);
 674
 675		return cursor;
 676	}
 677
 678	public SessionRecord loadSession(Account account, AxolotlAddress contact) {
 679		SessionRecord session = null;
 680		Cursor cursor = getCursorForSession(account, contact);
 681		if (cursor.getCount() != 0) {
 682			cursor.moveToFirst();
 683			try {
 684				session = new SessionRecord(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT));
 685			} catch (IOException e) {
 686				cursor.close();
 687				throw new AssertionError(e);
 688			}
 689		}
 690		cursor.close();
 691		return session;
 692	}
 693
 694	public List<Integer> getSubDeviceSessions(Account account, AxolotlAddress contact) {
 695		final SQLiteDatabase db = this.getReadableDatabase();
 696		return getSubDeviceSessions(db, account, contact);
 697	}
 698
 699	private List<Integer> getSubDeviceSessions(SQLiteDatabase db, Account account, AxolotlAddress contact) {
 700		List<Integer> devices = new ArrayList<>();
 701		String[] columns = {SQLiteAxolotlStore.DEVICE_ID};
 702		String[] selectionArgs = {account.getUuid(),
 703				contact.getName()};
 704		Cursor cursor = db.query(SQLiteAxolotlStore.SESSION_TABLENAME,
 705				columns,
 706				SQLiteAxolotlStore.ACCOUNT + " = ? AND "
 707						+ SQLiteAxolotlStore.NAME + " = ?",
 708				selectionArgs,
 709				null, null, null);
 710
 711		while (cursor.moveToNext()) {
 712			devices.add(cursor.getInt(
 713					cursor.getColumnIndex(SQLiteAxolotlStore.DEVICE_ID)));
 714		}
 715
 716		cursor.close();
 717		return devices;
 718	}
 719
 720	public boolean containsSession(Account account, AxolotlAddress contact) {
 721		Cursor cursor = getCursorForSession(account, contact);
 722		int count = cursor.getCount();
 723		cursor.close();
 724		return count != 0;
 725	}
 726
 727	public void storeSession(Account account, AxolotlAddress contact, SessionRecord session) {
 728		SQLiteDatabase db = this.getWritableDatabase();
 729		ContentValues values = new ContentValues();
 730		values.put(SQLiteAxolotlStore.NAME, contact.getName());
 731		values.put(SQLiteAxolotlStore.DEVICE_ID, contact.getDeviceId());
 732		values.put(SQLiteAxolotlStore.KEY, Base64.encodeToString(session.serialize(), Base64.DEFAULT));
 733		values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
 734		db.insert(SQLiteAxolotlStore.SESSION_TABLENAME, null, values);
 735	}
 736
 737	public void deleteSession(Account account, AxolotlAddress contact) {
 738		SQLiteDatabase db = this.getWritableDatabase();
 739		deleteSession(db, account, contact);
 740	}
 741
 742	private void deleteSession(SQLiteDatabase db, Account account, AxolotlAddress contact) {
 743		String[] args = {account.getUuid(),
 744				contact.getName(),
 745				Integer.toString(contact.getDeviceId())};
 746		db.delete(SQLiteAxolotlStore.SESSION_TABLENAME,
 747				SQLiteAxolotlStore.ACCOUNT + " = ? AND "
 748						+ SQLiteAxolotlStore.NAME + " = ? AND "
 749						+ SQLiteAxolotlStore.DEVICE_ID + " = ? ",
 750				args);
 751	}
 752
 753	public void deleteAllSessions(Account account, AxolotlAddress contact) {
 754		SQLiteDatabase db = this.getWritableDatabase();
 755		String[] args = {account.getUuid(), contact.getName()};
 756		db.delete(SQLiteAxolotlStore.SESSION_TABLENAME,
 757				SQLiteAxolotlStore.ACCOUNT + "=? AND "
 758						+ SQLiteAxolotlStore.NAME + " = ?",
 759				args);
 760	}
 761
 762	private Cursor getCursorForPreKey(Account account, int preKeyId) {
 763		SQLiteDatabase db = this.getReadableDatabase();
 764		String[] columns = {SQLiteAxolotlStore.KEY};
 765		String[] selectionArgs = {account.getUuid(), Integer.toString(preKeyId)};
 766		Cursor cursor = db.query(SQLiteAxolotlStore.PREKEY_TABLENAME,
 767				columns,
 768				SQLiteAxolotlStore.ACCOUNT + "=? AND "
 769						+ SQLiteAxolotlStore.ID + "=?",
 770				selectionArgs,
 771				null, null, null);
 772
 773		return cursor;
 774	}
 775
 776	public PreKeyRecord loadPreKey(Account account, int preKeyId) {
 777		PreKeyRecord record = null;
 778		Cursor cursor = getCursorForPreKey(account, preKeyId);
 779		if (cursor.getCount() != 0) {
 780			cursor.moveToFirst();
 781			try {
 782				record = new PreKeyRecord(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT));
 783			} catch (IOException e) {
 784				throw new AssertionError(e);
 785			}
 786		}
 787		cursor.close();
 788		return record;
 789	}
 790
 791	public boolean containsPreKey(Account account, int preKeyId) {
 792		Cursor cursor = getCursorForPreKey(account, preKeyId);
 793		int count = cursor.getCount();
 794		cursor.close();
 795		return count != 0;
 796	}
 797
 798	public void storePreKey(Account account, PreKeyRecord record) {
 799		SQLiteDatabase db = this.getWritableDatabase();
 800		ContentValues values = new ContentValues();
 801		values.put(SQLiteAxolotlStore.ID, record.getId());
 802		values.put(SQLiteAxolotlStore.KEY, Base64.encodeToString(record.serialize(), Base64.DEFAULT));
 803		values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
 804		db.insert(SQLiteAxolotlStore.PREKEY_TABLENAME, null, values);
 805	}
 806
 807	public void deletePreKey(Account account, int preKeyId) {
 808		SQLiteDatabase db = this.getWritableDatabase();
 809		String[] args = {account.getUuid(), Integer.toString(preKeyId)};
 810		db.delete(SQLiteAxolotlStore.PREKEY_TABLENAME,
 811				SQLiteAxolotlStore.ACCOUNT + "=? AND "
 812						+ SQLiteAxolotlStore.ID + "=?",
 813				args);
 814	}
 815
 816	private Cursor getCursorForSignedPreKey(Account account, int signedPreKeyId) {
 817		SQLiteDatabase db = this.getReadableDatabase();
 818		String[] columns = {SQLiteAxolotlStore.KEY};
 819		String[] selectionArgs = {account.getUuid(), Integer.toString(signedPreKeyId)};
 820		Cursor cursor = db.query(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
 821				columns,
 822				SQLiteAxolotlStore.ACCOUNT + "=? AND " + SQLiteAxolotlStore.ID + "=?",
 823				selectionArgs,
 824				null, null, null);
 825
 826		return cursor;
 827	}
 828
 829	public SignedPreKeyRecord loadSignedPreKey(Account account, int signedPreKeyId) {
 830		SignedPreKeyRecord record = null;
 831		Cursor cursor = getCursorForSignedPreKey(account, signedPreKeyId);
 832		if (cursor.getCount() != 0) {
 833			cursor.moveToFirst();
 834			try {
 835				record = new SignedPreKeyRecord(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT));
 836			} catch (IOException e) {
 837				throw new AssertionError(e);
 838			}
 839		}
 840		cursor.close();
 841		return record;
 842	}
 843
 844	public List<SignedPreKeyRecord> loadSignedPreKeys(Account account) {
 845		List<SignedPreKeyRecord> prekeys = new ArrayList<>();
 846		SQLiteDatabase db = this.getReadableDatabase();
 847		String[] columns = {SQLiteAxolotlStore.KEY};
 848		String[] selectionArgs = {account.getUuid()};
 849		Cursor cursor = db.query(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
 850				columns,
 851				SQLiteAxolotlStore.ACCOUNT + "=?",
 852				selectionArgs,
 853				null, null, null);
 854
 855		while (cursor.moveToNext()) {
 856			try {
 857				prekeys.add(new SignedPreKeyRecord(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT)));
 858			} catch (IOException ignored) {
 859			}
 860		}
 861		cursor.close();
 862		return prekeys;
 863	}
 864
 865	public boolean containsSignedPreKey(Account account, int signedPreKeyId) {
 866		Cursor cursor = getCursorForPreKey(account, signedPreKeyId);
 867		int count = cursor.getCount();
 868		cursor.close();
 869		return count != 0;
 870	}
 871
 872	public void storeSignedPreKey(Account account, SignedPreKeyRecord record) {
 873		SQLiteDatabase db = this.getWritableDatabase();
 874		ContentValues values = new ContentValues();
 875		values.put(SQLiteAxolotlStore.ID, record.getId());
 876		values.put(SQLiteAxolotlStore.KEY, Base64.encodeToString(record.serialize(), Base64.DEFAULT));
 877		values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
 878		db.insert(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME, null, values);
 879	}
 880
 881	public void deleteSignedPreKey(Account account, int signedPreKeyId) {
 882		SQLiteDatabase db = this.getWritableDatabase();
 883		String[] args = {account.getUuid(), Integer.toString(signedPreKeyId)};
 884		db.delete(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
 885				SQLiteAxolotlStore.ACCOUNT + "=? AND "
 886						+ SQLiteAxolotlStore.ID + "=?",
 887				args);
 888	}
 889
 890	private Cursor getIdentityKeyCursor(Account account, String name, boolean own) {
 891		final SQLiteDatabase db = this.getReadableDatabase();
 892		return getIdentityKeyCursor(db, account, name, own);
 893	}
 894
 895	private Cursor getIdentityKeyCursor(SQLiteDatabase db, Account account, String name, boolean own) {
 896		return getIdentityKeyCursor(db, account, name, own, null);
 897	}
 898
 899	private Cursor getIdentityKeyCursor(Account account, String fingerprint) {
 900		final SQLiteDatabase db = this.getReadableDatabase();
 901		return getIdentityKeyCursor(db, account, fingerprint);
 902	}
 903
 904	private Cursor getIdentityKeyCursor(SQLiteDatabase db, Account account, String fingerprint) {
 905		return getIdentityKeyCursor(db, account, null, null, fingerprint);
 906	}
 907
 908	private Cursor getIdentityKeyCursor(SQLiteDatabase db, Account account, String name, Boolean own, String fingerprint) {
 909		String[] columns = {SQLiteAxolotlStore.TRUSTED,
 910				SQLiteAxolotlStore.KEY};
 911		ArrayList<String> selectionArgs = new ArrayList<>(4);
 912		selectionArgs.add(account.getUuid());
 913		String selectionString = SQLiteAxolotlStore.ACCOUNT + " = ?";
 914		if (name != null) {
 915			selectionArgs.add(name);
 916			selectionString += " AND " + SQLiteAxolotlStore.NAME + " = ?";
 917		}
 918		if (fingerprint != null) {
 919			selectionArgs.add(fingerprint);
 920			selectionString += " AND " + SQLiteAxolotlStore.FINGERPRINT + " = ?";
 921		}
 922		if (own != null) {
 923			selectionArgs.add(own ? "1" : "0");
 924			selectionString += " AND " + SQLiteAxolotlStore.OWN + " = ?";
 925		}
 926		Cursor cursor = db.query(SQLiteAxolotlStore.IDENTITIES_TABLENAME,
 927				columns,
 928				selectionString,
 929				selectionArgs.toArray(new String[selectionArgs.size()]),
 930				null, null, null);
 931
 932		return cursor;
 933	}
 934
 935	public IdentityKeyPair loadOwnIdentityKeyPair(Account account) {
 936		SQLiteDatabase db = getReadableDatabase();
 937		return loadOwnIdentityKeyPair(db, account);
 938	}
 939
 940	private IdentityKeyPair loadOwnIdentityKeyPair(SQLiteDatabase db, Account account) {
 941		String name = account.getJid().toBareJid().toString();
 942		IdentityKeyPair identityKeyPair = null;
 943		Cursor cursor = getIdentityKeyCursor(db, account, name, true);
 944		if (cursor.getCount() != 0) {
 945			cursor.moveToFirst();
 946			try {
 947				identityKeyPair = new IdentityKeyPair(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT));
 948			} catch (InvalidKeyException e) {
 949				Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Encountered invalid IdentityKey in database for account" + account.getJid().toBareJid() + ", address: " + name);
 950			}
 951		}
 952		cursor.close();
 953
 954		return identityKeyPair;
 955	}
 956
 957	public Set<IdentityKey> loadIdentityKeys(Account account, String name) {
 958		return loadIdentityKeys(account, name, null);
 959	}
 960
 961	public Set<IdentityKey> loadIdentityKeys(Account account, String name, XmppAxolotlSession.Trust trust) {
 962		Set<IdentityKey> identityKeys = new HashSet<>();
 963		Cursor cursor = getIdentityKeyCursor(account, name, false);
 964
 965		while (cursor.moveToNext()) {
 966			if (trust != null &&
 967					cursor.getInt(cursor.getColumnIndex(SQLiteAxolotlStore.TRUSTED))
 968							!= trust.getCode()) {
 969				continue;
 970			}
 971			try {
 972				identityKeys.add(new IdentityKey(Base64.decode(cursor.getString(cursor.getColumnIndex(SQLiteAxolotlStore.KEY)), Base64.DEFAULT), 0));
 973			} catch (InvalidKeyException e) {
 974				Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Encountered invalid IdentityKey in database for account" + account.getJid().toBareJid() + ", address: " + name);
 975			}
 976		}
 977		cursor.close();
 978
 979		return identityKeys;
 980	}
 981
 982	public long numTrustedKeys(Account account, String name) {
 983		SQLiteDatabase db = getReadableDatabase();
 984		String[] args = {
 985				account.getUuid(),
 986				name,
 987				String.valueOf(XmppAxolotlSession.Trust.TRUSTED.getCode()),
 988				String.valueOf(XmppAxolotlSession.Trust.TRUSTED_X509.getCode())
 989		};
 990		return DatabaseUtils.queryNumEntries(db, SQLiteAxolotlStore.IDENTITIES_TABLENAME,
 991				SQLiteAxolotlStore.ACCOUNT + " = ?"
 992						+ " AND " + SQLiteAxolotlStore.NAME + " = ?"
 993						+ " AND (" + SQLiteAxolotlStore.TRUSTED + " = ? OR " + SQLiteAxolotlStore.TRUSTED + " = ?)",
 994				args
 995		);
 996	}
 997
 998	private void storeIdentityKey(Account account, String name, boolean own, String fingerprint, String base64Serialized) {
 999		storeIdentityKey(account, name, own, fingerprint, base64Serialized, XmppAxolotlSession.Trust.UNDECIDED);
1000	}
1001
1002	private void storeIdentityKey(Account account, String name, boolean own, String fingerprint, String base64Serialized, XmppAxolotlSession.Trust trusted) {
1003		SQLiteDatabase db = this.getWritableDatabase();
1004		ContentValues values = new ContentValues();
1005		values.put(SQLiteAxolotlStore.ACCOUNT, account.getUuid());
1006		values.put(SQLiteAxolotlStore.NAME, name);
1007		values.put(SQLiteAxolotlStore.OWN, own ? 1 : 0);
1008		values.put(SQLiteAxolotlStore.FINGERPRINT, fingerprint);
1009		values.put(SQLiteAxolotlStore.KEY, base64Serialized);
1010		values.put(SQLiteAxolotlStore.TRUSTED, trusted.getCode());
1011		db.insert(SQLiteAxolotlStore.IDENTITIES_TABLENAME, null, values);
1012	}
1013
1014	public XmppAxolotlSession.Trust isIdentityKeyTrusted(Account account, String fingerprint) {
1015		Cursor cursor = getIdentityKeyCursor(account, fingerprint);
1016		XmppAxolotlSession.Trust trust = null;
1017		if (cursor.getCount() > 0) {
1018			cursor.moveToFirst();
1019			int trustValue = cursor.getInt(cursor.getColumnIndex(SQLiteAxolotlStore.TRUSTED));
1020			trust = XmppAxolotlSession.Trust.fromCode(trustValue);
1021		}
1022		cursor.close();
1023		return trust;
1024	}
1025
1026	public boolean setIdentityKeyTrust(Account account, String fingerprint, XmppAxolotlSession.Trust trust) {
1027		SQLiteDatabase db = this.getWritableDatabase();
1028		return setIdentityKeyTrust(db, account, fingerprint, trust);
1029	}
1030
1031	private boolean setIdentityKeyTrust(SQLiteDatabase db, Account account, String fingerprint, XmppAxolotlSession.Trust trust) {
1032		String[] selectionArgs = {
1033				account.getUuid(),
1034				fingerprint
1035		};
1036		ContentValues values = new ContentValues();
1037		values.put(SQLiteAxolotlStore.TRUSTED, trust.getCode());
1038		int rows = db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, values,
1039				SQLiteAxolotlStore.ACCOUNT + " = ? AND "
1040						+ SQLiteAxolotlStore.FINGERPRINT + " = ? ",
1041				selectionArgs);
1042		return rows == 1;
1043	}
1044
1045	public boolean setIdentityKeyCertificate(Account account, String fingerprint, X509Certificate x509Certificate) {
1046		SQLiteDatabase db = this.getWritableDatabase();
1047		String[] selectionArgs = {
1048				account.getUuid(),
1049				fingerprint
1050		};
1051		try {
1052			ContentValues values = new ContentValues();
1053			values.put(SQLiteAxolotlStore.CERTIFICATE, x509Certificate.getEncoded());
1054			return db.update(SQLiteAxolotlStore.IDENTITIES_TABLENAME, values,
1055					SQLiteAxolotlStore.ACCOUNT + " = ? AND "
1056							+ SQLiteAxolotlStore.FINGERPRINT + " = ? ",
1057					selectionArgs) == 1;
1058		} catch (CertificateEncodingException e) {
1059			Log.d(Config.LOGTAG, "could not encode certificate");
1060			return false;
1061		}
1062	}
1063
1064	public X509Certificate getIdentityKeyCertifcate(Account account, String fingerprint) {
1065		SQLiteDatabase db = this.getReadableDatabase();
1066		String[] selectionArgs = {
1067				account.getUuid(),
1068				fingerprint
1069		};
1070		String[] colums = {SQLiteAxolotlStore.CERTIFICATE};
1071		String selection = SQLiteAxolotlStore.ACCOUNT + " = ? AND " + SQLiteAxolotlStore.FINGERPRINT + " = ? ";
1072		Cursor cursor = db.query(SQLiteAxolotlStore.IDENTITIES_TABLENAME, colums, selection, selectionArgs, null, null, null);
1073		if (cursor.getCount() < 1) {
1074			return null;
1075		} else {
1076			cursor.moveToFirst();
1077			byte[] certificate = cursor.getBlob(cursor.getColumnIndex(SQLiteAxolotlStore.CERTIFICATE));
1078			if (certificate == null || certificate.length == 0) {
1079				return null;
1080			}
1081			try {
1082				CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
1083				return (X509Certificate) certificateFactory.generateCertificate(new ByteArrayInputStream(certificate));
1084			} catch (CertificateException e) {
1085				Log.d(Config.LOGTAG,"certificate exception "+e.getMessage());
1086				return null;
1087			}
1088		}
1089	}
1090
1091	public void storeIdentityKey(Account account, String name, IdentityKey identityKey) {
1092		storeIdentityKey(account, name, false, identityKey.getFingerprint().replaceAll("\\s", ""), Base64.encodeToString(identityKey.serialize(), Base64.DEFAULT));
1093	}
1094
1095	public void storeOwnIdentityKeyPair(Account account, IdentityKeyPair identityKeyPair) {
1096		storeIdentityKey(account, account.getJid().toBareJid().toString(), true, identityKeyPair.getPublicKey().getFingerprint().replaceAll("\\s", ""), Base64.encodeToString(identityKeyPair.serialize(), Base64.DEFAULT), XmppAxolotlSession.Trust.TRUSTED);
1097	}
1098
1099	public void recreateAxolotlDb() {
1100		recreateAxolotlDb(getWritableDatabase());
1101	}
1102
1103	public void recreateAxolotlDb(SQLiteDatabase db) {
1104		Log.d(Config.LOGTAG, AxolotlService.LOGPREFIX + " : " + ">>> (RE)CREATING AXOLOTL DATABASE <<<");
1105		db.execSQL("DROP TABLE IF EXISTS " + SQLiteAxolotlStore.SESSION_TABLENAME);
1106		db.execSQL(CREATE_SESSIONS_STATEMENT);
1107		db.execSQL("DROP TABLE IF EXISTS " + SQLiteAxolotlStore.PREKEY_TABLENAME);
1108		db.execSQL(CREATE_PREKEYS_STATEMENT);
1109		db.execSQL("DROP TABLE IF EXISTS " + SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME);
1110		db.execSQL(CREATE_SIGNED_PREKEYS_STATEMENT);
1111		db.execSQL("DROP TABLE IF EXISTS " + SQLiteAxolotlStore.IDENTITIES_TABLENAME);
1112		db.execSQL(CREATE_IDENTITIES_STATEMENT);
1113	}
1114
1115	public void wipeAxolotlDb(Account account) {
1116		String accountName = account.getUuid();
1117		Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + ">>> WIPING AXOLOTL DATABASE FOR ACCOUNT " + accountName + " <<<");
1118		SQLiteDatabase db = this.getWritableDatabase();
1119		String[] deleteArgs = {
1120				accountName
1121		};
1122		db.delete(SQLiteAxolotlStore.SESSION_TABLENAME,
1123				SQLiteAxolotlStore.ACCOUNT + " = ?",
1124				deleteArgs);
1125		db.delete(SQLiteAxolotlStore.PREKEY_TABLENAME,
1126				SQLiteAxolotlStore.ACCOUNT + " = ?",
1127				deleteArgs);
1128		db.delete(SQLiteAxolotlStore.SIGNED_PREKEY_TABLENAME,
1129				SQLiteAxolotlStore.ACCOUNT + " = ?",
1130				deleteArgs);
1131		db.delete(SQLiteAxolotlStore.IDENTITIES_TABLENAME,
1132				SQLiteAxolotlStore.ACCOUNT + " = ?",
1133				deleteArgs);
1134	}
1135}