Add HSQLDB as an alternative DB library.

bramble-core/build.gradle

@@ -9,13 +9,14 @@ apply plugin: 'witness'
 dependencies {
 	implementation project(path: ':bramble-api', configuration: 'default')
 	implementation 'com.madgag.spongycastle:core:1.58.0.0'
-	implementation 'com.h2database:h2:1.4.192' // This is the last version that supports Java 1.6
+	implementation 'com.h2database:h2:1.4.192' // The last version that supports Java 1.6
 	implementation 'org.bitlet:weupnp:0.1.4'
 	implementation 'net.i2p.crypto:eddsa:0.2.0'
 
 	apt 'com.google.dagger:dagger-compiler:2.0.2'
 
 	testImplementation project(path: ':bramble-api', configuration: 'testOutput')
+	testImplementation 'org.hsqldb:hsqldb:2.3.5' // The last version that supports Java 1.6
 	testImplementation 'junit:junit:4.12'
 	testImplementation "org.jmock:jmock:2.8.2"
 	testImplementation "org.jmock:jmock-junit4:2.8.2"

bramble-core/src/main/java/org/briarproject/bramble/db/H2Database.java

@@ -22,16 +22,18 @@ import javax.inject.Inject;
 class H2Database extends JdbcDatabase {
 
 	private static final String HASH_TYPE = "BINARY(32)";
+	private static final String SECRET_TYPE = "BINARY(32)";
 	private static final String BINARY_TYPE = "BINARY";
 	private static final String COUNTER_TYPE = "INT NOT NULL AUTO_INCREMENT";
-	private static final String SECRET_TYPE = "BINARY(32)";
+	private static final String STRING_TYPE = "VARCHAR";
 
 	private final DatabaseConfig config;
 	private final String url;
 
 	@Inject
 	H2Database(DatabaseConfig config, Clock clock) {
-		super(HASH_TYPE, BINARY_TYPE, COUNTER_TYPE, SECRET_TYPE, clock);
+		super(HASH_TYPE, SECRET_TYPE, BINARY_TYPE, COUNTER_TYPE, STRING_TYPE,
+				clock);
 		this.config = config;
 		File dir = config.getDatabaseDirectory();
 		String path = new File(dir, "db").getAbsolutePath();

bramble-core/src/main/java/org/briarproject/bramble/db/HyperSqlDatabase.java

@@ -0,0 +1,99 @@
+package org.briarproject.bramble.db;
+
+import org.briarproject.bramble.api.crypto.SecretKey;
+import org.briarproject.bramble.api.db.DatabaseConfig;
+import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.system.Clock;
+import org.briarproject.bramble.util.StringUtils;
+
+import java.io.File;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+import javax.inject.Inject;
+
+/**
+ * Contains all the HSQLDB-specific code for the database.
+ */
+@NotNullByDefault
+class HyperSqlDatabase extends JdbcDatabase {
+
+	private static final String HASH_TYPE = "BINARY(32)";
+	private static final String SECRET_TYPE = "BINARY(32)";
+	private static final String BINARY_TYPE = "BINARY";
+	private static final String COUNTER_TYPE =
+			"INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY(START WITH 1)";
+	private static final String STRING_TYPE = "VARCHAR";
+
+	private final DatabaseConfig config;
+	private final String url;
+
+	@Inject
+	HyperSqlDatabase(DatabaseConfig config, Clock clock) {
+		super(HASH_TYPE, SECRET_TYPE, BINARY_TYPE, COUNTER_TYPE, STRING_TYPE,
+				clock);
+		this.config = config;
+		File dir = config.getDatabaseDirectory();
+		String path = new File(dir, "db").getAbsolutePath();
+		url = "jdbc:hsqldb:file:" + path
+				+ ";sql.enforce_size=false;allow_empty_batch=true"
+				+ ";encrypt_lobs=true;crypt_type=AES";
+	}
+
+	@Override
+	public boolean open() throws DbException {
+		boolean reopen = config.databaseExists();
+		if (!reopen) config.getDatabaseDirectory().mkdirs();
+		super.open("org.hsqldb.jdbc.JDBCDriver", reopen);
+		return reopen;
+	}
+
+	@Override
+	public void close() throws DbException {
+		try {
+			super.closeAllConnections();
+			Connection c = createConnection();
+			Statement s = c.createStatement();
+			s.executeQuery("SHUTDOWN");
+			s.close();
+			c.close();
+		} catch (SQLException e) {
+			throw new DbException(e);
+		}
+	}
+
+	@Override
+	public long getFreeSpace() throws DbException {
+		File dir = config.getDatabaseDirectory();
+		long maxSize = config.getMaxSize();
+		long free = dir.getFreeSpace();
+		long used = getDiskSpace(dir);
+		long quota = maxSize - used;
+		return Math.min(free, quota);
+	}
+
+	private long getDiskSpace(File f) {
+		if (f.isDirectory()) {
+			long total = 0;
+			File[] children = f.listFiles();
+			if (children != null)
+				for (File child : children) total += getDiskSpace(child);
+			return total;
+		} else if (f.isFile()) {
+			return f.length();
+		} else {
+			return 0;
+		}
+	}
+
+	@Override
+	protected Connection createConnection() throws SQLException {
+		SecretKey key = config.getEncryptionKey();
+		if (key == null) throw new IllegalStateException();
+		String hex = StringUtils.toHexString(key.getBytes());
+		return DriverManager.getConnection(url + ";crypt_key=" + hex);
+	}
+}

bramble-core/src/main/java/org/briarproject/bramble/db/JdbcDatabase.java

@@ -73,27 +73,27 @@ abstract class JdbcDatabase implements Database<Connection> {
 
 	private static final String CREATE_SETTINGS =
 			"CREATE TABLE settings"
-					+ " (namespace VARCHAR NOT NULL,"
-					+ " key VARCHAR NOT NULL,"
-					+ " value VARCHAR NOT NULL,"
-					+ " PRIMARY KEY (namespace, key))";
+					+ " (namespace _STRING NOT NULL,"
+					+ " \"key\" _STRING NOT NULL,"
+					+ " value _STRING NOT NULL,"
+					+ " PRIMARY KEY (namespace, \"key\"))";
 
 	private static final String CREATE_LOCAL_AUTHORS =
 			"CREATE TABLE localAuthors"
-					+ " (authorId HASH NOT NULL,"
-					+ " name VARCHAR NOT NULL,"
-					+ " publicKey BINARY NOT NULL,"
-					+ " privateKey BINARY NOT NULL,"
+					+ " (authorId _HASH NOT NULL,"
+					+ " name _STRING NOT NULL,"
+					+ " publicKey _BINARY NOT NULL,"
+					+ " privateKey _BINARY NOT NULL,"
 					+ " created BIGINT NOT NULL,"
 					+ " PRIMARY KEY (authorId))";
 
 	private static final String CREATE_CONTACTS =
 			"CREATE TABLE contacts"
-					+ " (contactId COUNTER,"
-					+ " authorId HASH NOT NULL,"
-					+ " name VARCHAR NOT NULL,"
-					+ " publicKey BINARY NOT NULL,"
-					+ " localAuthorId HASH NOT NULL,"
+					+ " (contactId _COUNTER,"
+					+ " authorId _HASH NOT NULL,"
+					+ " name _STRING NOT NULL,"
+					+ " publicKey _BINARY NOT NULL,"
+					+ " localAuthorId _HASH NOT NULL,"
 					+ " verified BOOLEAN NOT NULL,"
 					+ " active BOOLEAN NOT NULL,"
 					+ " PRIMARY KEY (contactId),"
@@ -103,17 +103,17 @@ abstract class JdbcDatabase implements Database<Connection> {
 
 	private static final String CREATE_GROUPS =
 			"CREATE TABLE groups"
-					+ " (groupId HASH NOT NULL,"
-					+ " clientId VARCHAR NOT NULL,"
-					+ " descriptor BINARY NOT NULL,"
+					+ " (groupId _HASH NOT NULL,"
+					+ " clientId _STRING NOT NULL,"
+					+ " descriptor _BINARY NOT NULL,"
 					+ " PRIMARY KEY (groupId))";
 
 	private static final String CREATE_GROUP_METADATA =
 			"CREATE TABLE groupMetadata"
-					+ " (groupId HASH NOT NULL,"
-					+ " key VARCHAR NOT NULL,"
-					+ " value BINARY NOT NULL,"
-					+ " PRIMARY KEY (groupId, key),"
+					+ " (groupId _HASH NOT NULL,"
+					+ " \"key\" _STRING NOT NULL,"
+					+ " value _BINARY NOT NULL,"
+					+ " PRIMARY KEY (groupId, \"key\"),"
 					+ " FOREIGN KEY (groupId)"
 					+ " REFERENCES groups (groupId)"
 					+ " ON DELETE CASCADE)";
@@ -121,7 +121,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 	private static final String CREATE_GROUP_VISIBILITIES =
 			"CREATE TABLE groupVisibilities"
 					+ " (contactId INT NOT NULL,"
-					+ " groupId HASH NOT NULL,"
+					+ " groupId _HASH NOT NULL,"
 					+ " shared BOOLEAN NOT NULL,"
 					+ " PRIMARY KEY (contactId, groupId),"
 					+ " FOREIGN KEY (contactId)"
@@ -133,8 +133,8 @@ abstract class JdbcDatabase implements Database<Connection> {
 
 	private static final String CREATE_MESSAGES =
 			"CREATE TABLE messages"
-					+ " (messageId HASH NOT NULL,"
-					+ " groupId HASH NOT NULL,"
+					+ " (messageId _HASH NOT NULL,"
+					+ " groupId _HASH NOT NULL,"
 					+ " timestamp BIGINT NOT NULL,"
 					+ " state INT NOT NULL,"
 					+ " shared BOOLEAN NOT NULL,"
@@ -147,19 +147,19 @@ abstract class JdbcDatabase implements Database<Connection> {
 
 	private static final String CREATE_MESSAGE_METADATA =
 			"CREATE TABLE messageMetadata"
-					+ " (messageId HASH NOT NULL,"
-					+ " key VARCHAR NOT NULL,"
-					+ " value BINARY NOT NULL,"
-					+ " PRIMARY KEY (messageId, key),"
+					+ " (messageId _HASH NOT NULL,"
+					+ " \"key\" _STRING NOT NULL,"
+					+ " value _BINARY NOT NULL,"
+					+ " PRIMARY KEY (messageId, \"key\"),"
 					+ " FOREIGN KEY (messageId)"
 					+ " REFERENCES messages (messageId)"
 					+ " ON DELETE CASCADE)";
 
 	private static final String CREATE_MESSAGE_DEPENDENCIES =
 			"CREATE TABLE messageDependencies"
-					+ " (groupId HASH NOT NULL,"
-					+ " messageId HASH NOT NULL,"
-					+ " dependencyId HASH NOT NULL," // Not a foreign key
+					+ " (groupId _HASH NOT NULL,"
+					+ " messageId _HASH NOT NULL,"
+					+ " dependencyId _HASH NOT NULL," // Not a foreign key
 					+ " FOREIGN KEY (groupId)"
 					+ " REFERENCES groups (groupId)"
 					+ " ON DELETE CASCADE,"
@@ -169,7 +169,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 
 	private static final String CREATE_OFFERS =
 			"CREATE TABLE offers"
-					+ " (messageId HASH NOT NULL," // Not a foreign key
+					+ " (messageId _HASH NOT NULL," // Not a foreign key
 					+ " contactId INT NOT NULL,"
 					+ " PRIMARY KEY (messageId, contactId),"
 					+ " FOREIGN KEY (contactId)"
@@ -178,7 +178,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 
 	private static final String CREATE_STATUSES =
 			"CREATE TABLE statuses"
-					+ " (messageId HASH NOT NULL,"
+					+ " (messageId _HASH NOT NULL,"
 					+ " contactId INT NOT NULL,"
 					+ " ack BOOLEAN NOT NULL,"
 					+ " seen BOOLEAN NOT NULL,"
@@ -195,20 +195,20 @@ abstract class JdbcDatabase implements Database<Connection> {
 
 	private static final String CREATE_TRANSPORTS =
 			"CREATE TABLE transports"
-					+ " (transportId VARCHAR NOT NULL,"
+					+ " (transportId _STRING NOT NULL,"
 					+ " maxLatency INT NOT NULL,"
 					+ " PRIMARY KEY (transportId))";
 
 	private static final String CREATE_INCOMING_KEYS =
 			"CREATE TABLE incomingKeys"
 					+ " (contactId INT NOT NULL,"
-					+ " transportId VARCHAR NOT NULL,"
-					+ " period BIGINT NOT NULL,"
-					+ " tagKey SECRET NOT NULL,"
-					+ " headerKey SECRET NOT NULL,"
+					+ " transportId _STRING NOT NULL,"
+					+ " \"period\" BIGINT NOT NULL,"
+					+ " tagKey _SECRET NOT NULL,"
+					+ " headerKey _SECRET NOT NULL,"
 					+ " base BIGINT NOT NULL,"
-					+ " bitmap BINARY NOT NULL,"
-					+ " PRIMARY KEY (contactId, transportId, period),"
+					+ " bitmap _BINARY NOT NULL,"
+					+ " PRIMARY KEY (contactId, transportId, \"period\"),"
 					+ " FOREIGN KEY (contactId)"
 					+ " REFERENCES contacts (contactId)"
 					+ " ON DELETE CASCADE,"
@@ -219,10 +219,10 @@ abstract class JdbcDatabase implements Database<Connection> {
 	private static final String CREATE_OUTGOING_KEYS =
 			"CREATE TABLE outgoingKeys"
 					+ " (contactId INT NOT NULL,"
-					+ " transportId VARCHAR NOT NULL,"
-					+ " period BIGINT NOT NULL,"
-					+ " tagKey SECRET NOT NULL,"
-					+ " headerKey SECRET NOT NULL,"
+					+ " transportId _STRING NOT NULL,"
+					+ " \"period\" BIGINT NOT NULL,"
+					+ " tagKey _SECRET NOT NULL,"
+					+ " headerKey _SECRET NOT NULL,"
 					+ " stream BIGINT NOT NULL,"
 					+ " PRIMARY KEY (contactId, transportId),"
 					+ " FOREIGN KEY (contactId)"
@@ -260,7 +260,8 @@ abstract class JdbcDatabase implements Database<Connection> {
 			Logger.getLogger(JdbcDatabase.class.getName());
 
 	// Different database libraries use different names for certain types
-	private final String hashType, binaryType, counterType, secretType;
+	private final String hashType, secretType, binaryType;
+	private final String counterType, stringType;
 	private final Clock clock;
 
 	// Locking: connectionsLock
@@ -275,12 +276,13 @@ abstract class JdbcDatabase implements Database<Connection> {
 	private final Lock connectionsLock = new ReentrantLock();
 	private final Condition connectionsChanged = connectionsLock.newCondition();
 
-	JdbcDatabase(String hashType, String binaryType, String counterType,
-			String secretType, Clock clock) {
+	JdbcDatabase(String hashType, String secretType, String binaryType,
+			String counterType, String stringType, Clock clock) {
 		this.hashType = hashType;
+		this.secretType = secretType;
 		this.binaryType = binaryType;
 		this.counterType = counterType;
-		this.secretType = secretType;
+		this.stringType = stringType;
 		this.clock = clock;
 	}
 
@@ -383,10 +385,11 @@ abstract class JdbcDatabase implements Database<Connection> {
 	}
 
 	private String insertTypeNames(String s) {
-		s = s.replaceAll("HASH", hashType);
-		s = s.replaceAll("BINARY", binaryType);
-		s = s.replaceAll("COUNTER", counterType);
-		s = s.replaceAll("SECRET", secretType);
+		s = s.replaceAll("_HASH", hashType);
+		s = s.replaceAll("_SECRET", secretType);
+		s = s.replaceAll("_BINARY", binaryType);
+		s = s.replaceAll("_COUNTER", counterType);
+		s = s.replaceAll("_STRING", stringType);
 		return s;
 	}
 
@@ -500,7 +503,8 @@ abstract class JdbcDatabase implements Database<Connection> {
 		try {
 			// Create a contact row
 			String sql = "INSERT INTO contacts"
-					+ " (authorId, name, publicKey, localAuthorId, verified, active)"
+					+ " (authorId, name, publicKey, localAuthorId,"
+					+ " verified, active)"
 					+ " VALUES (?, ?, ?, ?, ?, ?)";
 			ps = txn.prepareStatement(sql);
 			ps.setBytes(1, remote.getId().getBytes());
@@ -719,7 +723,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 		try {
 			// Store the incoming keys
 			String sql = "INSERT INTO incomingKeys (contactId, transportId,"
-					+ " period, tagKey, headerKey, base, bitmap)"
+					+ " \"period\", tagKey, headerKey, base, bitmap)"
 					+ " VALUES (?, ?, ?, ?, ?, ?, ?)";
 			ps = txn.prepareStatement(sql);
 			ps.setInt(1, c.getInt());
@@ -754,8 +758,8 @@ abstract class JdbcDatabase implements Database<Connection> {
 				if (rows != 1) throw new DbStateException();
 			ps.close();
 			// Store the outgoing keys
-			sql = "INSERT INTO outgoingKeys (contactId, transportId, period,"
-					+ " tagKey, headerKey, stream)"
+			sql = "INSERT INTO outgoingKeys (contactId, transportId,"
+					+ " \"period\", tagKey, headerKey, stream)"
 					+ " VALUES (?, ?, ?, ?, ?, ?)";
 			ps = txn.prepareStatement(sql);
 			ps.setInt(1, c.getInt());
@@ -1335,7 +1339,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 					+ " JOIN messageMetadata AS md"
 					+ " ON m.messageId = md.messageId"
 					+ " WHERE state = ? AND groupId = ?"
-					+ " AND key = ? AND value = ?";
+					+ " AND \"key\" = ? AND value = ?";
 			for (Entry<String, byte[]> e : query.entrySet()) {
 				ps = txn.prepareStatement(sql);
 				ps.setInt(1, DELIVERED.getValue());
@@ -1367,7 +1371,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
-			String sql = "SELECT m.messageId, key, value"
+			String sql = "SELECT m.messageId, \"key\", value"
 					+ " FROM messages AS m"
 					+ " JOIN messageMetadata AS md"
 					+ " ON m.messageId = md.messageId"
@@ -1417,7 +1421,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
-			String sql = "SELECT key, value FROM groupMetadata"
+			String sql = "SELECT \"key\", value FROM groupMetadata"
 					+ " WHERE groupId = ?";
 			ps = txn.prepareStatement(sql);
 			ps.setBytes(1, g.getBytes());
@@ -1440,7 +1444,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
-			String sql = "SELECT key, value FROM messageMetadata AS md"
+			String sql = "SELECT \"key\", value FROM messageMetadata AS md"
 					+ " JOIN messages AS m"
 					+ " ON m.messageId = md.messageId"
 					+ " WHERE m.state = ? AND md.messageId = ?";
@@ -1466,7 +1470,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
-			String sql = "SELECT key, value FROM messageMetadata AS md"
+			String sql = "SELECT \"key\", value FROM messageMetadata AS md"
 					+ " JOIN messages AS m"
 					+ " ON m.messageId = md.messageId"
 					+ " WHERE (m.state = ? OR m.state = ?)"
@@ -1904,7 +1908,8 @@ abstract class JdbcDatabase implements Database<Connection> {
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
-			String sql = "SELECT key, value FROM settings WHERE namespace = ?";
+			String sql = "SELECT \"key\", value FROM settings"
+					+ " WHERE namespace = ?";
 			ps = txn.prepareStatement(sql);
 			ps.setString(1, namespace);
 			rs = ps.executeQuery();
@@ -1927,10 +1932,10 @@ abstract class JdbcDatabase implements Database<Connection> {
 		ResultSet rs = null;
 		try {
 			// Retrieve the incoming keys
-			String sql = "SELECT period, tagKey, headerKey, base, bitmap"
+			String sql = "SELECT \"period\", tagKey, headerKey, base, bitmap"
 					+ " FROM incomingKeys"
 					+ " WHERE transportId = ?"
-					+ " ORDER BY contactId, period";
+					+ " ORDER BY contactId, \"period\"";
 			ps = txn.prepareStatement(sql);
 			ps.setString(1, t.getString());
 			rs = ps.executeQuery();
@@ -1947,10 +1952,10 @@ abstract class JdbcDatabase implements Database<Connection> {
 			rs.close();
 			ps.close();
 			// Retrieve the outgoing keys in the same order
-			sql = "SELECT contactId, period, tagKey, headerKey, stream"
+			sql = "SELECT contactId, \"period\", tagKey, headerKey, stream"
 					+ " FROM outgoingKeys"
 					+ " WHERE transportId = ?"
-					+ " ORDER BY contactId, period";
+					+ " ORDER BY contactId, \"period\"";
 			ps = txn.prepareStatement(sql);
 			ps.setString(1, t.getString());
 			rs = ps.executeQuery();
@@ -1987,7 +1992,8 @@ abstract class JdbcDatabase implements Database<Connection> {
 		PreparedStatement ps = null;
 		try {
 			String sql = "UPDATE outgoingKeys SET stream = stream + 1"
-					+ " WHERE contactId = ? AND transportId = ? AND period = ?";
+					+ " WHERE contactId = ? AND transportId = ?"
+					+ " AND \"period\" = ?";
 			ps = txn.prepareStatement(sql);
 			ps.setInt(1, c.getInt());
 			ps.setString(2, t.getString());
@@ -2081,7 +2087,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 			// Delete any keys that are being removed
 			if (!removed.isEmpty()) {
 				String sql = "DELETE FROM " + tableName
-						+ " WHERE " + columnName + " = ? AND key = ?";
+						+ " WHERE " + columnName + " = ? AND \"key\" = ?";
 				ps = txn.prepareStatement(sql);
 				ps.setBytes(1, id);
 				for (String key : removed) {
@@ -2100,7 +2106,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 			if (retained.isEmpty()) return;
 			// Update any keys that already exist
 			String sql = "UPDATE " + tableName + " SET value = ?"
-					+ " WHERE " + columnName + " = ? AND key = ?";
+					+ " WHERE " + columnName + " = ? AND \"key\" = ?";
 			ps = txn.prepareStatement(sql);
 			ps.setBytes(2, id);
 			for (Entry<String, byte[]> e : retained.entrySet()) {
@@ -2117,7 +2123,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 			}
 			// Insert any keys that don't already exist
 			sql = "INSERT INTO " + tableName
-					+ " (" + columnName + ", key, value)"
+					+ " (" + columnName + ", \"key\", value)"
 					+ " VALUES (?, ?, ?)";
 			ps = txn.prepareStatement(sql);
 			ps.setBytes(1, id);
@@ -2149,7 +2155,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 		try {
 			// Update any settings that already exist
 			String sql = "UPDATE settings SET value = ?"
-					+ " WHERE namespace = ? AND key = ?";
+					+ " WHERE namespace = ? AND \"key\" = ?";
 			ps = txn.prepareStatement(sql);
 			for (Entry<String, String> e : s.entrySet()) {
 				ps.setString(1, e.getValue());
@@ -2164,7 +2170,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 				if (rows > 1) throw new DbStateException();
 			}
 			// Insert any settings that don't already exist
-			sql = "INSERT INTO settings (namespace, key, value)"
+			sql = "INSERT INTO settings (namespace, \"key\", value)"
 					+ " VALUES (?, ?, ?)";
 			ps = txn.prepareStatement(sql);
 			int updateIndex = 0, inserted = 0;
@@ -2528,7 +2534,8 @@ abstract class JdbcDatabase implements Database<Connection> {
 		PreparedStatement ps = null;
 		try {
 			String sql = "UPDATE incomingKeys SET base = ?, bitmap = ?"
-					+ " WHERE contactId = ? AND transportId = ? AND period = ?";
+					+ " WHERE contactId = ? AND transportId = ?"
+					+ " AND \"period\" = ?";
 			ps = txn.prepareStatement(sql);
 			ps.setLong(1, base);
 			ps.setBytes(2, bitmap);

bramble-core/src/test/java/org/briarproject/bramble/db/BasicDatabaseTest.java

@@ -0,0 +1,380 @@
+package org.briarproject.bramble.db;
+
+import org.briarproject.bramble.test.BrambleTestCase;
+import org.briarproject.bramble.test.TestUtils;
+import org.briarproject.bramble.util.StringUtils;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.ArrayList;
+import java.util.List;
+
+import static java.sql.Types.BINARY;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+public abstract class BasicDatabaseTest extends BrambleTestCase {
+
+	private static final int BATCH_SIZE = 100;
+
+	private final File testDir = TestUtils.getTestDirectory();
+	private final File db = new File(testDir, "db");
+
+	protected abstract String getBinaryType();
+
+	protected abstract String getDriverName();
+
+	protected abstract Connection openConnection(File db, boolean encrypt)
+			throws SQLException;
+
+	protected abstract void shutdownDatabase(File db, boolean encrypt)
+			throws SQLException;
+
+	@Before
+	public void setUp() throws Exception {
+		testDir.mkdirs();
+		Class.forName(getDriverName());
+	}
+
+	@Test
+	public void testInsertUpdateAndDelete() throws Exception {
+		Connection connection = openConnection(db, false);
+		try {
+			// Create the table
+			createTable(connection);
+			// Generate an ID and two names
+			byte[] id = TestUtils.getRandomId();
+			String oldName = StringUtils.getRandomString(50);
+			String newName = StringUtils.getRandomString(50);
+			// Insert the ID and old name into the table
+			insertRow(connection, id, oldName);
+			// Check that the old name can be retrieved using the ID
+			assertTrue(rowExists(connection, id));
+			assertEquals(oldName, getName(connection, id));
+			// Update the name
+			updateRow(connection, id, newName);
+			// Check that the new name can be retrieved using the ID
+			assertTrue(rowExists(connection, id));
+			assertEquals(newName, getName(connection, id));
+			// Delete the row from the table
+			assertTrue(deleteRow(connection, id));
+			// Check that the row no longer exists
+			assertFalse(rowExists(connection, id));
+			// Deleting the row again should have no effect
+			assertFalse(deleteRow(connection, id));
+		} finally {
+			connection.close();
+			shutdownDatabase(db, false);
+		}
+	}
+
+	@Test
+	public void testBatchInsertUpdateAndDelete() throws Exception {
+		Connection connection = openConnection(db, false);
+		try {
+			// Create the table
+			createTable(connection);
+			// Generate some IDs and two sets of names
+			byte[][] ids = new byte[BATCH_SIZE][];
+			String[] oldNames = new String[BATCH_SIZE];
+			String[] newNames = new String[BATCH_SIZE];
+			for (int i = 0; i < BATCH_SIZE; i++) {
+				ids[i] = TestUtils.getRandomId();
+				oldNames[i] = StringUtils.getRandomString(50);
+				newNames[i] = StringUtils.getRandomString(50);
+			}
+			// Insert the IDs and old names into the table as a batch
+			insertBatch(connection, ids, oldNames);
+			// Update the names as a batch
+			updateBatch(connection, ids, newNames);
+			// Check that the new names can be retrieved using the IDs
+			for (int i = 0; i < BATCH_SIZE; i++) {
+				assertTrue(rowExists(connection, ids[i]));
+				assertEquals(newNames[i], getName(connection, ids[i]));
+			}
+			// Delete the rows as a batch
+			boolean[] deleted = deleteBatch(connection, ids);
+			// Check that the rows no longer exist
+			for (int i = 0; i < BATCH_SIZE; i++) {
+				assertTrue(deleted[i]);
+				assertFalse(rowExists(connection, ids[i]));
+			}
+			// Deleting the rows again should have no effect
+			deleted = deleteBatch(connection, ids);
+			for (int i = 0; i < BATCH_SIZE; i++) assertFalse(deleted[i]);
+		} finally {
+			connection.close();
+			shutdownDatabase(db, false);
+		}
+	}
+
+	@Test
+	public void testSortOrder() throws Exception {
+		byte[] first = new byte[] {
+				0, 0, 0, 0, 0, 0, 0, 0,
+				0, 0, 0, 0, 0, 0, 0, 0,
+				0, 0, 0, 0, 0, 0, 0, 0,
+				0, 0, 0, 0, 0, 0, 0, 0
+		};
+		byte[] second = new byte[] {
+				0, 0, 0, 0, 0, 0, 0, 0,
+				0, 0, 0, 0, 0, 0, 0, 0,
+				0, 0, 0, 0, 0, 0, 0, 0,
+				0, 0, 0, 0, 0, 0, 0, 127
+		};
+		byte[] third = new byte[] {
+				0, 0, 0, 0, 0, 0, 0, 0,
+				0, 0, 0, 0, 0, 0, 0, 0,
+				0, 0, 0, 0, 0, 0, 0, 0,
+				0, 0, 0, 0, 0, 0, 0, (byte) 255
+		};
+		Connection connection = openConnection(db, false);
+		try {
+			// Create the table
+			createTable(connection);
+			// Insert the rows
+			insertRow(connection, first, "first");
+			insertRow(connection, second, "second");
+			insertRow(connection, third, "third");
+			insertRow(connection, null, "null");
+			// Check the ordering of the < operator: null is not comparable
+			assertNull(getPredecessor(connection, first));
+			assertEquals("first", getPredecessor(connection, second));
+			assertEquals("second", getPredecessor(connection, third));
+			assertNull(getPredecessor(connection, null));
+			// Check the ordering of ORDER BY: nulls come first
+			List<String> names = getNames(connection);
+			assertEquals(4, names.size());
+			assertEquals("null", names.get(0));
+			assertEquals("first", names.get(1));
+			assertEquals("second", names.get(2));
+			assertEquals("third", names.get(3));
+		} finally {
+			connection.close();
+			shutdownDatabase(db, false);
+		}
+	}
+
+	@Test
+	public void testDataIsFoundWithoutEncryption() throws Exception {
+		testEncryption(false);
+	}
+
+	@Test
+	public void testDataIsNotFoundWithEncryption() throws Exception {
+		testEncryption(true);
+	}
+
+	private void testEncryption(boolean encrypt) throws Exception {
+		byte[] sequence = new byte[] {'a', 'b', 'c', 'd', 'e', 'f', 'g'};
+		Connection connection = openConnection(db, encrypt);
+		try {
+			createTable(connection);
+			insertRow(connection, sequence, "abcdefg");
+		} finally {
+			connection.close();
+			shutdownDatabase(db, encrypt);
+		}
+		try {
+			if (findSequence(testDir, sequence) == encrypt) fail();
+		} finally {
+			shutdownDatabase(db, encrypt);
+		}
+	}
+
+	private void createTable(Connection connection) throws SQLException {
+		Statement s = connection.createStatement();
+		String sql = "CREATE TABLE foo (uniqueId " + getBinaryType() + ","
+				+ " name VARCHAR(100) NOT NULL)";
+		s.executeUpdate(sql);
+		s.close();
+	}
+
+	private void insertRow(Connection connection, byte[] id, String name)
+			throws SQLException {
+		String sql = "INSERT INTO foo (uniqueId, name) VALUES (?, ?)";
+		PreparedStatement ps = connection.prepareStatement(sql);
+		if (id == null) ps.setNull(1, BINARY);
+		else ps.setBytes(1, id);
+		ps.setString(2, name);
+		int affected = ps.executeUpdate();
+		assertEquals(1, affected);
+		ps.close();
+	}
+
+	private boolean rowExists(Connection connection, byte[] id)
+			throws SQLException {
+		assertNotNull(id);
+		String sql = "SELECT * FROM foo WHERE uniqueID = ?";
+		PreparedStatement ps = connection.prepareStatement(sql);
+		ps.setBytes(1, id);
+		ResultSet rs = ps.executeQuery();
+		boolean found = rs.next();
+		assertFalse(rs.next());
+		rs.close();
+		ps.close();
+		return found;
+	}
+
+	private String getName(Connection connection, byte[] id)
+			throws SQLException {
+		assertNotNull(id);
+		String sql = "SELECT name FROM foo WHERE uniqueID = ?";
+		PreparedStatement ps = connection.prepareStatement(sql);
+		ps.setBytes(1, id);
+		ResultSet rs = ps.executeQuery();
+		assertTrue(rs.next());
+		String name = rs.getString(1);
+		assertFalse(rs.next());
+		rs.close();
+		ps.close();
+		return name;
+	}
+
+	private void updateRow(Connection connection, byte[] id, String name)
+			throws SQLException {
+		String sql = "UPDATE foo SET name = ? WHERE uniqueId = ?";
+		PreparedStatement ps = connection.prepareStatement(sql);
+		if (id == null) ps.setNull(2, BINARY);
+		else ps.setBytes(2, id);
+		ps.setString(1, name);
+		assertEquals(1, ps.executeUpdate());
+		ps.close();
+	}
+
+	private boolean deleteRow(Connection connection, byte[] id)
+			throws SQLException {
+		String sql = "DELETE FROM foo WHERE uniqueId = ?";
+		PreparedStatement ps = connection.prepareStatement(sql);
+		if (id == null) ps.setNull(1, BINARY);
+		else ps.setBytes(1, id);
+		int affected = ps.executeUpdate();
+		ps.close();
+		return affected == 1;
+	}
+
+	private void insertBatch(Connection connection, byte[][] ids,
+			String[] names) throws SQLException {
+		assertEquals(ids.length, names.length);
+		String sql = "INSERT INTO foo (uniqueId, name) VALUES (?, ?)";
+		PreparedStatement ps = connection.prepareStatement(sql);
+		for (int i = 0; i < ids.length; i++) {
+			if (ids[i] == null) ps.setNull(1, BINARY);
+			else ps.setBytes(1, ids[i]);
+			ps.setString(2, names[i]);
+			ps.addBatch();
+		}
+		int[] batchAffected = ps.executeBatch();
+		assertEquals(ids.length, batchAffected.length);
+		for (int affected : batchAffected) assertEquals(1, affected);
+		ps.close();
+	}
+
+	private void updateBatch(Connection connection, byte[][] ids,
+			String[] names) throws SQLException {
+		assertEquals(ids.length, names.length);
+		String sql = "UPDATE foo SET name = ? WHERE uniqueId = ?";
+		PreparedStatement ps = connection.prepareStatement(sql);
+		for (int i = 0; i < ids.length; i++) {
+			if (ids[i] == null) ps.setNull(2, BINARY);
+			else ps.setBytes(2, ids[i]);
+			ps.setString(1, names[i]);
+			ps.addBatch();
+		}
+		int[] batchAffected = ps.executeBatch();
+		assertEquals(ids.length, batchAffected.length);
+		for (int affected : batchAffected) assertEquals(1, affected);
+		ps.close();
+	}
+
+	private boolean[] deleteBatch(Connection connection, byte[][] ids)
+			throws SQLException {
+		String sql = "DELETE FROM foo WHERE uniqueId = ?";
+		PreparedStatement ps = connection.prepareStatement(sql);
+		for (byte[] id : ids) {
+			if (id == null) ps.setNull(1, BINARY);
+			else ps.setBytes(1, id);
+			ps.addBatch();
+		}
+		int[] batchAffected = ps.executeBatch();
+		assertEquals(ids.length, batchAffected.length);
+		boolean[] ret = new boolean[ids.length];
+		for (int i = 0; i < batchAffected.length; i++)
+			ret[i] = batchAffected[i] == 1;
+		ps.close();
+		return ret;
+	}
+
+	private String getPredecessor(Connection connection, byte[] id)
+			throws SQLException {
+		String sql = "SELECT name FROM foo WHERE uniqueId < ?"
+				+ " ORDER BY uniqueId DESC";
+		PreparedStatement ps = connection.prepareStatement(sql);
+		ps.setBytes(1, id);
+		ps.setMaxRows(1);
+		ResultSet rs = ps.executeQuery();
+		String name = rs.next() ? rs.getString(1) : null;
+		assertFalse(rs.next());
+		rs.close();
+		ps.close();
+		return name;
+	}
+
+	private List<String> getNames(Connection connection) throws SQLException {
+		String sql = "SELECT name FROM foo ORDER BY uniqueId NULLS FIRST";
+		List<String> names = new ArrayList<>();
+		PreparedStatement ps = connection.prepareStatement(sql);
+		ResultSet rs = ps.executeQuery();
+		while (rs.next()) names.add(rs.getString(1));
+		rs.close();
+		ps.close();
+		return names;
+	}
+
+	private boolean findSequence(File f, byte[] sequence) throws IOException {
+		if (f.isDirectory()) {
+			File[] children = f.listFiles();
+			if (children != null)
+				for (File child : children)
+					if (findSequence(child, sequence)) return true;
+			return false;
+		} else if (f.isFile()) {
+			FileInputStream in = new FileInputStream(f);
+			try {
+				int offset = 0;
+				while (true) {
+					int read = in.read();
+					if (read == -1) return false;
+					if (((byte) read) == sequence[offset]) {
+						offset++;
+						if (offset == sequence.length) return true;
+					} else {
+						offset = 0;
+					}
+				}
+			} finally {
+				in.close();
+			}
+		} else {
+			return false;
+		}
+	}
+
+	@After
+	public void tearDown() throws Exception {
+		TestUtils.deleteTestDirectory(testDir);
+	}
+}

bramble-core/src/test/java/org/briarproject/bramble/db/BasicH2Test.java

@@ -1,345 +1,47 @@
 package org.briarproject.bramble.db;
 
-import org.briarproject.bramble.test.BrambleTestCase;
+import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.test.TestUtils;
 import org.briarproject.bramble.util.StringUtils;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
 
 import java.io.File;
 import java.sql.Connection;
 import java.sql.DriverManager;
-import java.sql.PreparedStatement;
-import java.sql.ResultSet;
 import java.sql.SQLException;
-import java.sql.Statement;
-import java.util.ArrayList;
-import java.util.List;
+import java.util.Properties;
 
-import static java.sql.Types.BINARY;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
-import static org.junit.Assert.assertTrue;
+public class BasicH2Test extends BasicDatabaseTest {
 
-public class BasicH2Test extends BrambleTestCase {
+	private final SecretKey key = TestUtils.getSecretKey();
 
-	private static final String CREATE_TABLE =
-			"CREATE TABLE foo (uniqueId BINARY(32), name VARCHAR NOT NULL)";
-	private static final int BATCH_SIZE = 100;
-
-	private final File testDir = TestUtils.getTestDirectory();
-	private final File db = new File(testDir, "db");
-	private final String url = "jdbc:h2:" + db.getAbsolutePath();
-
-	private Connection connection = null;
-
-	@Before
-	public void setUp() throws Exception {
-		testDir.mkdirs();
-		Class.forName("org.h2.Driver");
-		connection = DriverManager.getConnection(url);
+	@Override
+	protected String getBinaryType() {
+		return "BINARY(32)";
 	}
 
-	@Test
-	public void testInsertUpdateAndDelete() throws Exception {
-		// Create the table
-		createTable(connection);
-		// Generate an ID and two names
-		byte[] id = TestUtils.getRandomId();
-		String oldName = StringUtils.getRandomString(50);
-		String newName = StringUtils.getRandomString(50);
-		// Insert the ID and old name into the table
-		insertRow(id, oldName);
-		// Check that the old name can be retrieved using the ID
-		assertTrue(rowExists(id));
-		assertEquals(oldName, getName(id));
-		// Update the name
-		updateRow(id, newName);
-		// Check that the new name can be retrieved using the ID
-		assertTrue(rowExists(id));
-		assertEquals(newName, getName(id));
-		// Delete the row from the table
-		assertTrue(deleteRow(id));
-		// Check that the row no longer exists
-		assertFalse(rowExists(id));
-		// Deleting the row again should have no effect
-		assertFalse(deleteRow(id));
+	@Override
+	protected String getDriverName() {
+		return "org.h2.Driver";
 	}
 
-	@Test
-	public void testBatchInsertUpdateAndDelete() throws Exception {
-		// Create the table
-		createTable(connection);
-		// Generate some IDs and two sets of names
-		byte[][] ids = new byte[BATCH_SIZE][];
-		String[] oldNames = new String[BATCH_SIZE];
-		String[] newNames = new String[BATCH_SIZE];
-		for (int i = 0; i < BATCH_SIZE; i++) {
-			ids[i] = TestUtils.getRandomId();
-			oldNames[i] = StringUtils.getRandomString(50);
-			newNames[i] = StringUtils.getRandomString(50);
+	@Override
+	protected Connection openConnection(File db, boolean encrypt)
+			throws SQLException {
+		String url = "jdbc:h2:split:" + db.getAbsolutePath()
+				+ ";DB_CLOSE_ON_EXIT=false";
+		Properties props = new Properties();
+		props.setProperty("user", "user");
+		if (encrypt) {
+			url += ";CIPHER=AES";
+			String hex = StringUtils.toHexString(key.getBytes());
+			props.setProperty("password", hex + " password");
 		}
-		// Insert the IDs and old names into the table as a batch
-		insertBatch(ids, oldNames);
-		// Update the names as a batch
-		updateBatch(ids, newNames);
-		// Check that the new names can be retrieved using the IDs
-		for (int i = 0; i < BATCH_SIZE; i++) {
-			assertTrue(rowExists(ids[i]));
-			assertEquals(newNames[i], getName(ids[i]));
-		}
-		// Delete the rows as a batch
-		boolean[] deleted = deleteBatch(ids);
-		// Check that the rows no longer exist
-		for (int i = 0; i < BATCH_SIZE; i++) {
-			assertTrue(deleted[i]);
-			assertFalse(rowExists(ids[i]));
-		}
-		// Deleting the rows again should have no effect
-		deleted = deleteBatch(ids);
-		for (int i = 0; i < BATCH_SIZE; i++) assertFalse(deleted[i]);
+		return DriverManager.getConnection(url, props);
 	}
 
-	@Test
-	public void testSortOrder() throws Exception {
-		byte[] first = new byte[] {
-				0, 0, 0, 0, 0, 0, 0, 0,
-				0, 0, 0, 0, 0, 0, 0, 0,
-				0, 0, 0, 0, 0, 0, 0, 0,
-				0, 0, 0, 0, 0, 0, 0, 0
-		};
-		byte[] second = new byte[] {
-				0, 0, 0, 0, 0, 0, 0, 0,
-				0, 0, 0, 0, 0, 0, 0, 0,
-				0, 0, 0, 0, 0, 0, 0, 0,
-				0, 0, 0, 0, 0, 0, 0, 127
-		};
-		byte[] third = new byte[] {
-				0, 0, 0, 0, 0, 0, 0, 0,
-				0, 0, 0, 0, 0, 0, 0, 0,
-				0, 0, 0, 0, 0, 0, 0, 0,
-				0, 0, 0, 0, 0, 0, 0, (byte) 255
-		};
-		// Create the table
-		createTable(connection);
-		// Insert the rows
-		insertRow(first, "first");
-		insertRow(second, "second");
-		insertRow(third, "third");
-		insertRow(null, "null");
-		// Check the ordering of the < operator: the null ID is not comparable
-		assertNull(getPredecessor(first));
-		assertEquals("first", getPredecessor(second));
-		assertEquals("second", getPredecessor(third));
-		assertNull(getPredecessor(null));
-		// Check the ordering of ORDER BY: nulls come first
-		List<String> names = getNames();
-		assertEquals(4, names.size());
-		assertEquals("null", names.get(0));
-		assertEquals("first", names.get(1));
-		assertEquals("second", names.get(2));
-		assertEquals("third", names.get(3));
-	}
-
-	private void createTable(Connection connection) throws SQLException {
-		try {
-			Statement s = connection.createStatement();
-			s.executeUpdate(CREATE_TABLE);
-			s.close();
-		} catch (SQLException e) {
-			connection.close();
-			throw e;
-		}
-	}
-
-	private void insertRow(byte[] id, String name) throws SQLException {
-		String sql = "INSERT INTO foo (uniqueId, name) VALUES (?, ?)";
-		try {
-			PreparedStatement ps = connection.prepareStatement(sql);
-			if (id == null) ps.setNull(1, BINARY);
-			else ps.setBytes(1, id);
-			ps.setString(2, name);
-			int affected = ps.executeUpdate();
-			assertEquals(1, affected);
-			ps.close();
-		} catch (SQLException e) {
-			connection.close();
-			throw e;
-		}
-	}
-
-	private boolean rowExists(byte[] id) throws SQLException {
-		assertNotNull(id);
-		String sql = "SELECT NULL FROM foo WHERE uniqueID = ?";
-		try {
-			PreparedStatement ps = connection.prepareStatement(sql);
-			ps.setBytes(1, id);
-			ResultSet rs = ps.executeQuery();
-			boolean found = rs.next();
-			assertFalse(rs.next());
-			rs.close();
-			ps.close();
-			return found;
-		} catch (SQLException e) {
-			connection.close();
-			throw e;
-		}
-	}
-
-	private String getName(byte[] id) throws SQLException {
-		assertNotNull(id);
-		String sql = "SELECT name FROM foo WHERE uniqueID = ?";
-		try {
-			PreparedStatement ps = connection.prepareStatement(sql);
-			ps.setBytes(1, id);
-			ResultSet rs = ps.executeQuery();
-			assertTrue(rs.next());
-			String name = rs.getString(1);
-			assertFalse(rs.next());
-			rs.close();
-			ps.close();
-			return name;
-		} catch (SQLException e) {
-			connection.close();
-			throw e;
-		}
-	}
-
-	private void updateRow(byte[] id, String name) throws SQLException {
-		String sql = "UPDATE foo SET name = ? WHERE uniqueId = ?";
-		try {
-			PreparedStatement ps = connection.prepareStatement(sql);
-			if (id == null) ps.setNull(2, BINARY);
-			else ps.setBytes(2, id);
-			ps.setString(1, name);
-			assertEquals(1, ps.executeUpdate());
-			ps.close();
-		} catch (SQLException e) {
-			connection.close();
-			throw e;
-		}
-	}
-
-	private boolean deleteRow(byte[] id) throws SQLException {
-		String sql = "DELETE FROM foo WHERE uniqueId = ?";
-		try {
-			PreparedStatement ps = connection.prepareStatement(sql);
-			if (id == null) ps.setNull(1, BINARY);
-			else ps.setBytes(1, id);
-			int affected = ps.executeUpdate();
-			ps.close();
-			return affected == 1;
-		} catch (SQLException e) {
-			connection.close();
-			throw e;
-		}
-	}
-
-	private void insertBatch(byte[][] ids, String[] names) throws SQLException {
-		assertEquals(ids.length, names.length);
-		String sql = "INSERT INTO foo (uniqueId, name) VALUES (?, ?)";
-		try {
-			PreparedStatement ps = connection.prepareStatement(sql);
-			for (int i = 0; i < ids.length; i++) {
-				if (ids[i] == null) ps.setNull(1, BINARY);
-				else ps.setBytes(1, ids[i]);
-				ps.setString(2, names[i]);
-				ps.addBatch();
-			}
-			int[] batchAffected = ps.executeBatch();
-			assertEquals(ids.length, batchAffected.length);
-			for (int affected : batchAffected) assertEquals(1, affected);
-			ps.close();
-		} catch (SQLException e) {
-			connection.close();
-			throw e;
-		}
-	}
-
-	private void updateBatch(byte[][] ids, String[] names) throws SQLException {
-		assertEquals(ids.length, names.length);
-		String sql = "UPDATE foo SET name = ? WHERE uniqueId = ?";
-		try {
-			PreparedStatement ps = connection.prepareStatement(sql);
-			for (int i = 0; i < ids.length; i++) {
-				if (ids[i] == null) ps.setNull(2, BINARY);
-				else ps.setBytes(2, ids[i]);
-				ps.setString(1, names[i]);
-				ps.addBatch();
-			}
-			int[] batchAffected = ps.executeBatch();
-			assertEquals(ids.length, batchAffected.length);
-			for (int affected : batchAffected) assertEquals(1, affected);
-			ps.close();
-		} catch (SQLException e) {
-			connection.close();
-			throw e;
-		}
-	}
-
-	private boolean[] deleteBatch(byte[][] ids) throws SQLException {
-		String sql = "DELETE FROM foo WHERE uniqueId = ?";
-		try {
-			PreparedStatement ps = connection.prepareStatement(sql);
-			for (byte[] id : ids) {
-				if (id == null) ps.setNull(1, BINARY);
-				else ps.setBytes(1, id);
-				ps.addBatch();
-			}
-			int[] batchAffected = ps.executeBatch();
-			assertEquals(ids.length, batchAffected.length);
-			boolean[] ret = new boolean[ids.length];
-			for (int i = 0; i < batchAffected.length; i++)
-				ret[i] = batchAffected[i] == 1;
-			ps.close();
-			return ret;
-		} catch (SQLException e) {
-			connection.close();
-			throw e;
-		}
-	}
-
-	private String getPredecessor(byte[] id) throws SQLException {
-		String sql = "SELECT name FROM foo WHERE uniqueId < ?"
-				+ " ORDER BY uniqueId DESC LIMIT ?";
-		try {
-			PreparedStatement ps = connection.prepareStatement(sql);
-			ps.setBytes(1, id);
-			ps.setInt(2, 1);
-			ResultSet rs = ps.executeQuery();
-			String name = rs.next() ? rs.getString(1) : null;
-			assertFalse(rs.next());
-			rs.close();
-			ps.close();
-			return name;
-		} catch (SQLException e) {
-			connection.close();
-			throw e;
-		}
-	}
-
-	private List<String> getNames() throws SQLException {
-		String sql = "SELECT name FROM foo ORDER BY uniqueId";
-		List<String> names = new ArrayList<>();
-		try {
-			PreparedStatement ps = connection.prepareStatement(sql);
-			ResultSet rs = ps.executeQuery();
-			while (rs.next()) names.add(rs.getString(1));
-			rs.close();
-			ps.close();
-			return names;
-		} catch (SQLException e) {
-			connection.close();
-			throw e;
-		}
-	}
-
-	@After
-	public void tearDown() throws Exception {
-		if (connection != null) connection.close();
-		TestUtils.deleteTestDirectory(testDir);
+	@Override
+	protected void shutdownDatabase(File db, boolean encrypt)
+			throws SQLException {
+		// The DB is closed automatically when the connection is closed
 	}
 }

bramble-core/src/test/java/org/briarproject/bramble/db/BasicHyperSqlTest.java

@@ -0,0 +1,48 @@
+package org.briarproject.bramble.db;
+
+import org.briarproject.bramble.api.crypto.SecretKey;
+import org.briarproject.bramble.test.TestUtils;
+import org.briarproject.bramble.util.StringUtils;
+
+import java.io.File;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+public class BasicHyperSqlTest extends BasicDatabaseTest {
+
+	private final SecretKey key = TestUtils.getSecretKey();
+
+	@Override
+	protected String getBinaryType() {
+		return "BINARY(32)";
+	}
+
+	@Override
+	protected String getDriverName() {
+		return "org.hsqldb.jdbc.JDBCDriver";
+	}
+
+	@Override
+	protected Connection openConnection(File db, boolean encrypt)
+			throws SQLException {
+		String url = "jdbc:hsqldb:file:" + db.getAbsolutePath() +
+				";sql.enforce_size=false;allow_empty_batch=true";
+		if (encrypt) {
+			String hex = StringUtils.toHexString(key.getBytes());
+			url += ";encrypt_lobs=true;crypt_type=AES;crypt_key=" + hex;
+		}
+		return DriverManager.getConnection(url);
+	}
+
+	@Override
+	protected void shutdownDatabase(File db, boolean encrypt)
+			throws SQLException {
+		Connection c = openConnection(db, encrypt);
+		Statement s = c.createStatement();
+		s.executeQuery("SHUTDOWN");
+		s.close();
+		c.close();
+	}
+}

bramble-core/src/test/java/org/briarproject/bramble/db/H2TransactionIsolationTest.java

@@ -19,7 +19,7 @@ import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
-public class TransactionIsolationTest extends BrambleTestCase {
+public class H2TransactionIsolationTest extends BrambleTestCase {
 
 	private static final String DROP_TABLE = "DROP TABLE foo IF EXISTS";
 	private static final String CREATE_TABLE = "CREATE TABLE foo"
@@ -34,10 +34,10 @@ public class TransactionIsolationTest extends BrambleTestCase {
 
 	private final File testDir = TestUtils.getTestDirectory();
 	private final File db = new File(testDir, "db");
-	private final String withMvcc = "jdbc:h2:" + db.getAbsolutePath()
-			+ ";MV_STORE=TRUE;MVCC=TRUE";
-	private final String withoutMvcc = "jdbc:h2:" + db.getAbsolutePath()
-			+ ";MV_STORE=FALSE;MVCC=FALSE;LOCK_MODE=1";
+	private final String withMvcc = "jdbc:h2:split:" + db.getAbsolutePath()
+			+ ";MV_STORE=TRUE;MVCC=TRUE;DB_CLOSE_ON_EXIT=false";
+	private final String withoutMvcc = "jdbc:h2:split:" + db.getAbsolutePath()
+			+ ";MV_STORE=FALSE;MVCC=FALSE;LOCK_MODE=1;DB_CLOSE_ON_EXIT=false";
 
 	@Before
 	public void setUp() throws Exception {

bramble-core/src/test/java/org/briarproject/bramble/db/HyperSqlDatabaseTest.java

@@ -0,0 +1,16 @@
+package org.briarproject.bramble.db;
+
+import org.briarproject.bramble.api.db.DatabaseConfig;
+import org.briarproject.bramble.api.system.Clock;
+
+public class HyperSqlDatabaseTest extends JdbcDatabaseTest {
+
+	public HyperSqlDatabaseTest() throws Exception {
+		super();
+	}
+
+	@Override
+	protected JdbcDatabase createDatabase(DatabaseConfig config, Clock clock) {
+		return new HyperSqlDatabase(config, clock);
+	}
+}