Merge branch '1538-create-handshake-key-pair' into 'master'

Generate and store handshake key pair at startup if necessary

Closes #1538

See merge request briar/briar!1082

bramble-api/src/main/java/org/briarproject/bramble/api/client/BdfIncomingMessageHook.java

@@ -33,7 +33,8 @@ public abstract class BdfIncomingMessageHook implements IncomingMessageHook {
 	/**
 	 * Called once for each incoming message that passes validation.
 	 *
-	 * @return whether or not this message should be shared
+	 * @param txn A read-write transaction
+	 * @return Whether or not this message should be shared
 	 * @throws DbException Should only be used for real database errors.
 	 * If this is thrown, delivery will be attempted again at next startup,
 	 * whereas if a FormatException is thrown, the message will be permanently

bramble-api/src/main/java/org/briarproject/bramble/api/contact/ContactManager.java

@@ -159,8 +159,20 @@ public interface ContactManager {
 
 	interface ContactHook {
 
+		/**
+		 * Called when a contact is being added.
+		 *
+		 * @param txn A read-write transaction
+		 * @param c The contact that is being added
+		 */
 		void addingContact(Transaction txn, Contact c) throws DbException;
 
+		/**
+		 * Called when a contact is being removed
+		 *
+		 * @param txn A read-write transaction
+		 * @param c The contact that is being removed
+		 */
 		void removingContact(Transaction txn, Contact c) throws DbException;
 	}
 }

bramble-api/src/main/java/org/briarproject/bramble/api/db/DatabaseComponent.java

@@ -7,7 +7,7 @@ import org.briarproject.bramble.api.contact.PendingContactId;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.identity.AuthorId;
-import org.briarproject.bramble.api.identity.LocalAuthor;
+import org.briarproject.bramble.api.identity.Identity;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.settings.Settings;
@@ -128,9 +128,9 @@ public interface DatabaseComponent {
 			HandshakeKeys k) throws DbException;
 
 	/**
-	 * Stores a local pseudonym.
+	 * Stores an identity.
 	 */
-	void addLocalAuthor(Transaction txn, LocalAuthor a) throws DbException;
+	void addIdentity(Transaction txn, Identity i) throws DbException;
 
 	/**
 	 * Stores a local message.
@@ -174,12 +174,12 @@ public interface DatabaseComponent {
 	boolean containsGroup(Transaction txn, GroupId g) throws DbException;
 
 	/**
-	 * Returns true if the database contains the given local author.
+	 * Returns true if the database contains an identity for the given
+	 * pseudonym.
 	 * <p/>
 	 * Read-only.
 	 */
-	boolean containsLocalAuthor(Transaction txn, AuthorId local)
-			throws DbException;
+	boolean containsIdentity(Transaction txn, AuthorId a) throws DbException;
 
 	/**
 	 * Returns true if the database contains the given pending contact.
@@ -317,18 +317,18 @@ public interface DatabaseComponent {
 			throws DbException;
 
 	/**
-	 * Returns the local pseudonym with the given ID.
+	 * Returns the identity for the local pseudonym with the given ID.
 	 * <p/>
 	 * Read-only.
 	 */
-	LocalAuthor getLocalAuthor(Transaction txn, AuthorId a) throws DbException;
+	Identity getIdentity(Transaction txn, AuthorId a) throws DbException;
 
 	/**
-	 * Returns all local pseudonyms.
+	 * Returns the identities for all local pseudonyms.
 	 * <p/>
 	 * Read-only.
 	 */
-	Collection<LocalAuthor> getLocalAuthors(Transaction txn) throws DbException;
+	Collection<Identity> getIdentities(Transaction txn) throws DbException;
 
 	/**
 	 * Returns the message with the given ID.
@@ -559,9 +559,9 @@ public interface DatabaseComponent {
 			HandshakeKeySetId k) throws DbException;
 
 	/**
-	 * Removes a local pseudonym (and all associated state) from the database.
+	 * Removes an identity (and all associated state) from the database.
 	 */
-	void removeLocalAuthor(Transaction txn, AuthorId a) throws DbException;
+	void removeIdentity(Transaction txn, AuthorId a) throws DbException;
 
 	/**
 	 * Removes a message (and all associated state) from the database.
@@ -619,6 +619,12 @@ public interface DatabaseComponent {
 	void addMessageDependencies(Transaction txn, Message dependent,
 			Collection<MessageId> dependencies) throws DbException;
 
+	/**
+	 * Sets the handshake key pair for the identity with the given ID.
+	 */
+	void setHandshakeKeyPair(Transaction txn, AuthorId local, byte[] publicKey,
+			byte[] privateKey) throws DbException;
+
 	/**
 	 * Sets the reordering window for the given transport key set in the given
 	 * time period.

bramble-api/src/main/java/org/briarproject/bramble/api/db/NoSuchIdentityException.java

@@ -1,9 +1,9 @@
 package org.briarproject.bramble.api.db;
 
 /**
- * Thrown when a database operation is attempted for a pseudonym that is not in
+ * Thrown when a database operation is attempted for an identity that is not in
  * the database. This exception may occur due to concurrent updates and does
  * not indicate a database error.
  */
-public class NoSuchLocalAuthorException extends DbException {
+public class NoSuchIdentityException extends DbException {
 }

bramble-api/src/main/java/org/briarproject/bramble/api/identity/AuthorFactory.java

@@ -18,14 +18,7 @@ public interface AuthorFactory {
 
 	/**
 	 * Creates a local author with the current format version and the given
-	 * name and keys.
+	 * name.
 	 */
-	LocalAuthor createLocalAuthor(String name, byte[] publicKey,
-			byte[] privateKey);
-
-	/**
-	 * Creates a local author with the given format version, name and keys.
-	 */
-	LocalAuthor createLocalAuthor(int formatVersion, String name,
-			byte[] publicKey, byte[] privateKey);
+	LocalAuthor createLocalAuthor(String name);
 }

bramble-api/src/main/java/org/briarproject/bramble/api/identity/Identity.java

@@ -0,0 +1,96 @@
+package org.briarproject.bramble.api.identity;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+import java.util.Arrays;
+
+import javax.annotation.Nullable;
+import javax.annotation.concurrent.Immutable;
+
+import static org.briarproject.bramble.api.crypto.CryptoConstants.MAX_AGREEMENT_PUBLIC_KEY_BYTES;
+
+@Immutable
+@NotNullByDefault
+public class Identity {
+
+	private final LocalAuthor localAuthor;
+	@Nullable
+	private final byte[] handshakePublicKey, handshakePrivateKey;
+	private final long created;
+
+	public Identity(LocalAuthor localAuthor,
+			@Nullable byte[] handshakePublicKey,
+			@Nullable byte[] handshakePrivateKey, long created) {
+		if (handshakePublicKey != null) {
+			int keyLength = handshakePublicKey.length;
+			if (keyLength == 0 || keyLength > MAX_AGREEMENT_PUBLIC_KEY_BYTES)
+				throw new IllegalArgumentException();
+		}
+		this.localAuthor = localAuthor;
+		this.handshakePublicKey = handshakePublicKey;
+		this.handshakePrivateKey = handshakePrivateKey;
+		this.created = created;
+	}
+
+	/**
+	 * Returns the ID of the user's pseudonym.
+	 */
+	public AuthorId getId() {
+		return localAuthor.getId();
+	}
+
+	/**
+	 * Returns the user's pseudonym.
+	 */
+	public LocalAuthor getLocalAuthor() {
+		return localAuthor;
+	}
+
+	/**
+	 * Returns true if the identity has a handshake key pair.
+	 */
+	public boolean hasHandshakeKeyPair() {
+		return handshakePublicKey != null && handshakePrivateKey != null;
+	}
+
+	/**
+	 * Returns the public key used for handshaking, or null if no key exists.
+	 */
+	@Nullable
+	public byte[] getHandshakePublicKey() {
+		return handshakePublicKey;
+	}
+
+	/**
+	 * Returns the private key used for handshaking, or null if no key exists.
+	 */
+	@Nullable
+	public byte[] getHandshakePrivateKey() {
+		return handshakePrivateKey;
+	}
+
+	/**
+	 * Returns the time the identity was created, in milliseconds since the
+	 * Unix epoch.
+	 */
+	public long getTimeCreated() {
+		return created;
+	}
+
+	@Override
+	public int hashCode() {
+		return localAuthor.getId().hashCode();
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		if (o instanceof Identity) {
+			Identity i = (Identity) o;
+			return created == i.created &&
+					localAuthor.equals(i.localAuthor) &&
+					Arrays.equals(handshakePublicKey, i.handshakePublicKey) &&
+					Arrays.equals(handshakePrivateKey, i.handshakePrivateKey);
+		}
+		return false;
+	}
+}

bramble-api/src/main/java/org/briarproject/bramble/api/identity/IdentityManager.java

@@ -1,30 +1,29 @@
 package org.briarproject.bramble.api.identity;
 
 import org.briarproject.bramble.api.crypto.CryptoExecutor;
+import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Transaction;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 @NotNullByDefault
 public interface IdentityManager {
 
 	/**
-	 * Creates a local identity with the given name.
+	 * Creates an identity with the given name. The identity includes a
+	 * handshake key pair.
 	 */
 	@CryptoExecutor
-	LocalAuthor createLocalAuthor(String name);
+	Identity createIdentity(String name);
 
 	/**
-	 * Registers the given local identity with the manager. The identity is
-	 * not stored until {@link #storeLocalAuthor()} is called.
+	 * Registers the given identity with the manager. This method should be
+	 * called before {@link LifecycleManager#startServices(SecretKey)}. The
+	 * identity is stored when {@link LifecycleManager#startServices(SecretKey)}
+	 * is called. The identity must include a handshake key pair.
 	 */
-	void registerLocalAuthor(LocalAuthor a);
-
-	/**
-	 * Stores the local identity registered with
-	 * {@link #registerLocalAuthor(LocalAuthor)}, if any.
-	 */
-	void storeLocalAuthor() throws DbException;
+	void registerIdentity(Identity i);
 
 	/**
 	 * Returns the cached local identity or loads it from the database.
@@ -33,7 +32,18 @@ public interface IdentityManager {
 
 	/**
 	 * Returns the cached local identity or loads it from the database.
+	 * <p/>
+	 * Read-only.
 	 */
 	LocalAuthor getLocalAuthor(Transaction txn) throws DbException;
 
+	/**
+	 * Returns the cached handshake keys or loads them from the database.
+	 * <p/>
+	 * Read-only.
+	 *
+	 * @return A two-element array containing the public key in the first
+	 * element and the private key in the second
+	 */
+	byte[][] getHandshakeKeys(Transaction txn) throws DbException;
 }

bramble-api/src/main/java/org/briarproject/bramble/api/identity/LocalAuthor.java

@@ -2,11 +2,8 @@ package org.briarproject.bramble.api.identity;
 
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
-import javax.annotation.Nullable;
 import javax.annotation.concurrent.Immutable;
 
-import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_PUBLIC_KEY_LENGTH;
-
 /**
  * A pseudonym for the local user.
  */
@@ -15,31 +12,11 @@ import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_PUBLIC_K
 public class LocalAuthor extends Author {
 
 	private final byte[] privateKey;
-	@Nullable
-	private final byte[] handshakePublicKey, handshakePrivateKey;
-	private final long created;
 
 	public LocalAuthor(AuthorId id, int formatVersion, String name,
-			byte[] publicKey, byte[] privateKey, long created) {
+			byte[] publicKey, byte[] privateKey) {
 		super(id, formatVersion, name, publicKey);
 		this.privateKey = privateKey;
-		this.created = created;
-		handshakePublicKey = null;
-		handshakePrivateKey = null;
-	}
-
-	public LocalAuthor(AuthorId id, int formatVersion, String name,
-			byte[] publicKey, byte[] privateKey, byte[] handshakePublicKey,
-			byte[] handshakePrivateKey, long created) {
-		super(id, formatVersion, name, publicKey);
-		if (handshakePublicKey.length == 0 ||
-				handshakePublicKey.length > MAX_PUBLIC_KEY_LENGTH) {
-			throw new IllegalArgumentException();
-		}
-		this.privateKey = privateKey;
-		this.handshakePublicKey = handshakePublicKey;
-		this.handshakePrivateKey = handshakePrivateKey;
-		this.created = created;
 	}
 
 	/**
@@ -48,28 +25,4 @@ public class LocalAuthor extends Author {
 	public byte[] getPrivateKey() {
 		return privateKey;
 	}
-
-	/**
-	 * Returns the public key used for handshaking, or null if no key exists.
-	 */
-	@Nullable
-	public byte[] getHandshakePublicKey() {
-		return handshakePublicKey;
-	}
-
-	/**
-	 * Returns the private key used for handshaking, or null if no key exists.
-	 */
-	@Nullable
-	public byte[] getHandshakePrivateKey() {
-		return handshakePrivateKey;
-	}
-
-	/**
-	 * Returns the time the pseudonym was created, in milliseconds since the
-	 * Unix epoch.
-	 */
-	public long getTimeCreated() {
-		return created;
-	}
 }

bramble-api/src/main/java/org/briarproject/bramble/api/identity/event/IdentityAddedEvent.java

@@ -7,15 +7,15 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import javax.annotation.concurrent.Immutable;
 
 /**
- * An event that is broadcast when a local pseudonym is added.
+ * An event that is broadcast when an identity is added.
  */
 @Immutable
 @NotNullByDefault
-public class LocalAuthorAddedEvent extends Event {
+public class IdentityAddedEvent extends Event {
 
 	private final AuthorId authorId;
 
-	public LocalAuthorAddedEvent(AuthorId authorId) {
+	public IdentityAddedEvent(AuthorId authorId) {
 		this.authorId = authorId;
 	}
 

bramble-api/src/main/java/org/briarproject/bramble/api/identity/event/IdentityRemovedEvent.java

@@ -7,15 +7,15 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import javax.annotation.concurrent.Immutable;
 
 /**
- * An event that is broadcast when a local pseudonym is removed.
+ * An event that is broadcast when an identity is removed.
  */
 @Immutable
 @NotNullByDefault
-public class LocalAuthorRemovedEvent extends Event {
+public class IdentityRemovedEvent extends Event {
 
 	private final AuthorId authorId;
 
-	public LocalAuthorRemovedEvent(AuthorId authorId) {
+	public IdentityRemovedEvent(AuthorId authorId) {
 		this.authorId = authorId;
 	}
 

bramble-api/src/main/java/org/briarproject/bramble/api/lifecycle/LifecycleManager.java

@@ -2,16 +2,16 @@ package org.briarproject.bramble.api.lifecycle;
 
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseComponent;
+import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.db.Transaction;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.Client;
 
 import java.util.concurrent.ExecutorService;
 
 /**
- * Manages the lifecycle of the app, starting {@link Client Clients}, starting
- * and stopping {@link Service Services}, shutting down
- * {@link ExecutorService ExecutorServices}, and opening and closing the
- * {@link DatabaseComponent}.
+ * Manages the lifecycle of the app: opening and closing the
+ * {@link DatabaseComponent} starting and stopping {@link Service Services},
+ * and shutting down {@link ExecutorService ExecutorServices}.
  */
 @NotNullByDefault
 public interface LifecycleManager {
@@ -42,18 +42,19 @@ public interface LifecycleManager {
 		}
 	}
 
+	/**
+	 * Registers a hook to be called after the database is opened and before
+	 * {@link Service services} are started. This method should be called
+	 * before {@link #startServices(SecretKey)}.
+	 */
+	void registerOpenDatabaseHook(OpenDatabaseHook hook);
+
 	/**
 	 * Registers a {@link Service} to be started and stopped. This method
 	 * should be called before {@link #startServices(SecretKey)}.
 	 */
 	void registerService(Service s);
 
-	/**
-	 * Registers a {@link Client} to be started. This method should be called
-	 * before {@link #startServices(SecretKey)}.
-	 */
-	void registerClient(Client c);
-
 	/**
 	 * Registers an {@link ExecutorService} to be shut down. This method
 	 * should be called before {@link #startServices(SecretKey)}.
@@ -62,7 +63,7 @@ public interface LifecycleManager {
 
 	/**
 	 * Opens the {@link DatabaseComponent} using the given key and starts any
-	 * registered {@link Client Clients} and {@link Service Services}.
+	 * registered {@link Service Services}.
 	 */
 	StartResult startServices(SecretKey dbKey);
 
@@ -80,8 +81,7 @@ public interface LifecycleManager {
 
 	/**
 	 * Waits for the {@link DatabaseComponent} to be opened and all registered
-	 * {@link Client Clients} and {@link Service Services} to start before
-	 * returning.
+	 * {@link Service Services} to start before returning.
 	 */
 	void waitForStartup() throws InterruptedException;
 
@@ -97,4 +97,13 @@ public interface LifecycleManager {
 	 */
 	LifecycleState getLifecycleState();
 
+	interface OpenDatabaseHook {
+		/**
+		 * Called when the database is being opened, before
+		 * {@link #waitForDatabase()} returns.
+		 *
+		 * @param txn A read-write transaction
+		 */
+		void onDatabaseOpened(Transaction txn) throws DbException;
+	}
 }

bramble-api/src/main/java/org/briarproject/bramble/api/sync/Client.java

@@ -1,14 +0,0 @@
-package org.briarproject.bramble.api.sync;
-
-import org.briarproject.bramble.api.db.DbException;
-import org.briarproject.bramble.api.db.Transaction;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-@NotNullByDefault
-public interface Client {
-
-	/**
-	 * Called at startup to create any local state needed by the client.
-	 */
-	void createLocalState(Transaction txn) throws DbException;
-}

bramble-api/src/main/java/org/briarproject/bramble/api/sync/validation/IncomingMessageHook.java

@@ -11,7 +11,8 @@ public interface IncomingMessageHook {
 	/**
 	 * Called once for each incoming message that passes validation.
 	 *
-	 * @return whether or not this message should be shared
+	 * @param txn A read-write transaction
+	 * @return Whether or not this message should be shared
 	 * @throws DbException Should only be used for real database errors.
 	 * If this is thrown, delivery will be attempted again at next startup,
 	 * whereas if an InvalidMessageException is thrown,

bramble-api/src/main/java/org/briarproject/bramble/api/versioning/ClientVersioningManager.java

@@ -46,7 +46,14 @@ public interface ClientVersioningManager {
 			ClientId clientId, int majorVersion) throws DbException;
 
 	interface ClientVersioningHook {
-
+		/**
+		 * Called when the visibility of a client with respect to a contact is
+		 * changing.
+		 *
+		 * @param txn A read-write transaction
+		 * @param c The contact affected by the visibility change
+		 * @param v The new visibility of the client
+		 */
 		void onClientVisibilityChanging(Transaction txn, Contact c,
 				Visibility v) throws DbException;
 	}

bramble-api/src/test/java/org/briarproject/bramble/test/TestUtils.java

@@ -8,6 +8,7 @@ import org.briarproject.bramble.api.contact.PendingContactId;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.identity.AuthorId;
+import org.briarproject.bramble.api.identity.Identity;
 import org.briarproject.bramble.api.identity.LocalAuthor;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.properties.TransportProperties;
@@ -30,6 +31,7 @@ import java.util.concurrent.atomic.AtomicInteger;
 
 import static java.util.Arrays.asList;
 import static org.briarproject.bramble.api.contact.PendingContactState.WAITING_FOR_CONNECTION;
+import static org.briarproject.bramble.api.crypto.CryptoConstants.MAX_AGREEMENT_PUBLIC_KEY_BYTES;
 import static org.briarproject.bramble.api.identity.Author.FORMAT_VERSION;
 import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_AUTHOR_NAME_LENGTH;
 import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_PUBLIC_KEY_LENGTH;
@@ -99,25 +101,26 @@ public class TestUtils {
 		return new SecretKey(getRandomBytes(SecretKey.LENGTH));
 	}
 
-	public static LocalAuthor getLocalAuthor() {
-		return getLocalAuthor(1 + random.nextInt(MAX_AUTHOR_NAME_LENGTH));
-	}
-
-	public static LocalAuthor getLocalAuthor(int nameLength) {
-		AuthorId id = new AuthorId(getRandomId());
-		String name = getRandomString(nameLength);
-		byte[] publicKey = getRandomBytes(MAX_PUBLIC_KEY_LENGTH);
-		byte[] privateKey = getRandomBytes(MAX_PUBLIC_KEY_LENGTH);
-		return new LocalAuthor(id, FORMAT_VERSION, name, publicKey, privateKey,
+	public static Identity getIdentity() {
+		LocalAuthor localAuthor = getLocalAuthor();
+		byte[] handshakePub = getRandomBytes(MAX_AGREEMENT_PUBLIC_KEY_BYTES);
+		byte[] handshakePriv = getRandomBytes(MAX_AGREEMENT_PUBLIC_KEY_BYTES);
+		return new Identity(localAuthor, handshakePub, handshakePriv,
 				timestamp);
 	}
 
-	public static Author getAuthor() {
-		return getAuthor(1 + random.nextInt(MAX_AUTHOR_NAME_LENGTH));
+	public static LocalAuthor getLocalAuthor() {
+		AuthorId id = new AuthorId(getRandomId());
+		int nameLength = 1 + random.nextInt(MAX_AUTHOR_NAME_LENGTH);
+		String name = getRandomString(nameLength);
+		byte[] publicKey = getRandomBytes(MAX_PUBLIC_KEY_LENGTH);
+		byte[] privateKey = getRandomBytes(MAX_PUBLIC_KEY_LENGTH);
+		return new LocalAuthor(id, FORMAT_VERSION, name, publicKey, privateKey);
 	}
 
-	public static Author getAuthor(int nameLength) {
+	public static Author getAuthor() {
 		AuthorId id = new AuthorId(getRandomId());
+		int nameLength = 1 + random.nextInt(MAX_AUTHOR_NAME_LENGTH);
 		String name = getRandomString(nameLength);
 		byte[] publicKey = getRandomBytes(MAX_PUBLIC_KEY_LENGTH);
 		return new Author(id, FORMAT_VERSION, name, publicKey);

bramble-core/src/main/java/org/briarproject/bramble/account/AccountManagerImpl.java

@@ -4,8 +4,8 @@ import org.briarproject.bramble.api.account.AccountManager;
 import org.briarproject.bramble.api.crypto.CryptoComponent;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseConfig;
+import org.briarproject.bramble.api.identity.Identity;
 import org.briarproject.bramble.api.identity.IdentityManager;
-import org.briarproject.bramble.api.identity.LocalAuthor;
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.bramble.util.IoUtils;
@@ -161,8 +161,8 @@ class AccountManagerImpl implements AccountManager {
 		synchronized (stateChangeLock) {
 			if (hasDatabaseKey())
 				throw new AssertionError("Already have a database key");
-			LocalAuthor localAuthor = identityManager.createLocalAuthor(name);
-			identityManager.registerLocalAuthor(localAuthor);
+			Identity identity = identityManager.createIdentity(name);
+			identityManager.registerIdentity(identity);
 			SecretKey key = crypto.generateSecretKey();
 			if (!encryptAndStoreDatabaseKey(key, password)) return false;
 			databaseKey = key;

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

@@ -15,7 +15,7 @@ import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.db.MigrationListener;
 import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.identity.AuthorId;
-import org.briarproject.bramble.api.identity.LocalAuthor;
+import org.briarproject.bramble.api.identity.Identity;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.settings.Settings;
@@ -120,9 +120,9 @@ interface Database<T> {
 			HandshakeKeys k) throws DbException;
 
 	/**
-	 * Stores a local pseudonym.
+	 * Stores an identity.
 	 */
-	void addLocalAuthor(T txn, LocalAuthor a) throws DbException;
+	void addIdentity(T txn, Identity i) throws DbException;
 
 	/**
 	 * Stores a message.
@@ -187,11 +187,12 @@ interface Database<T> {
 	boolean containsGroup(T txn, GroupId g) throws DbException;
 
 	/**
-	 * Returns true if the database contains the given local pseudonym.
+	 * Returns true if the database contains an identity for the given
+	 * pseudonym.
 	 * <p/>
 	 * Read-only.
 	 */
-	boolean containsLocalAuthor(T txn, AuthorId a) throws DbException;
+	boolean containsIdentity(T txn, AuthorId a) throws DbException;
 
 	/**
 	 * Returns true if the database contains the given message.
@@ -323,18 +324,18 @@ interface Database<T> {
 			throws DbException;
 
 	/**
-	 * Returns the local pseudonym with the given ID.
+	 * Returns the identity for local pseudonym with the given ID.
 	 * <p/>
 	 * Read-only.
 	 */
-	LocalAuthor getLocalAuthor(T txn, AuthorId a) throws DbException;
+	Identity getIdentity(T txn, AuthorId a) throws DbException;
 
 	/**
-	 * Returns all local pseudonyms.
+	 * Returns the identities for all local pseudonyms.
 	 * <p/>
 	 * Read-only.
 	 */
-	Collection<LocalAuthor> getLocalAuthors(T txn) throws DbException;
+	Collection<Identity> getIdentities(T txn) throws DbException;
 
 	/**
 	 * Returns the message with the given ID.
@@ -629,9 +630,9 @@ interface Database<T> {
 			throws DbException;
 
 	/**
-	 * Removes a local pseudonym (and all associated state) from the database.
+	 * Removes an identity (and all associated state) from the database.
 	 */
-	void removeLocalAuthor(T txn, AuthorId a) throws DbException;
+	void removeIdentity(T txn, AuthorId a) throws DbException;
 
 	/**
 	 * Removes a message (and all associated state) from the database.
@@ -685,6 +686,12 @@ interface Database<T> {
 	void setGroupVisibility(T txn, ContactId c, GroupId g, boolean shared)
 			throws DbException;
 
+	/**
+	 * Sets the handshake key pair for the identity with the given ID.
+	 */
+	void setHandshakeKeyPair(T txn, AuthorId local, byte[] publicKey,
+			byte[] privateKey) throws DbException;
+
 	/**
 	 * Marks the given message as shared.
 	 */

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

@@ -20,7 +20,7 @@ import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.db.MigrationListener;
 import org.briarproject.bramble.api.db.NoSuchContactException;
 import org.briarproject.bramble.api.db.NoSuchGroupException;
-import org.briarproject.bramble.api.db.NoSuchLocalAuthorException;
+import org.briarproject.bramble.api.db.NoSuchIdentityException;
 import org.briarproject.bramble.api.db.NoSuchMessageException;
 import org.briarproject.bramble.api.db.NoSuchPendingContactException;
 import org.briarproject.bramble.api.db.NoSuchTransportException;
@@ -32,9 +32,9 @@ import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.event.EventExecutor;
 import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.identity.AuthorId;
-import org.briarproject.bramble.api.identity.LocalAuthor;
-import org.briarproject.bramble.api.identity.event.LocalAuthorAddedEvent;
-import org.briarproject.bramble.api.identity.event.LocalAuthorRemovedEvent;
+import org.briarproject.bramble.api.identity.Identity;
+import org.briarproject.bramble.api.identity.event.IdentityAddedEvent;
+import org.briarproject.bramble.api.identity.event.IdentityRemovedEvent;
 import org.briarproject.bramble.api.lifecycle.ShutdownManager;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.TransportId;
@@ -237,9 +237,9 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 			throws DbException {
 		if (transaction.isReadOnly()) throw new IllegalArgumentException();
 		T txn = unbox(transaction);
-		if (!db.containsLocalAuthor(txn, local))
-			throw new NoSuchLocalAuthorException();
-		if (db.containsLocalAuthor(txn, remote.getId()))
+		if (!db.containsIdentity(txn, local))
+			throw new NoSuchIdentityException();
+		if (db.containsIdentity(txn, remote.getId()))
 			throw new ContactExistsException();
 		if (db.containsContact(txn, remote.getId(), local))
 			throw new ContactExistsException();
@@ -283,13 +283,13 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 	}
 
 	@Override
-	public void addLocalAuthor(Transaction transaction, LocalAuthor a)
+	public void addIdentity(Transaction transaction, Identity i)
 			throws DbException {
 		if (transaction.isReadOnly()) throw new IllegalArgumentException();
 		T txn = unbox(transaction);
-		if (!db.containsLocalAuthor(txn, a.getId())) {
-			db.addLocalAuthor(txn, a);
-			transaction.attach(new LocalAuthorAddedEvent(a.getId()));
+		if (!db.containsIdentity(txn, i.getId())) {
+			db.addIdentity(txn, i);
+			transaction.attach(new IdentityAddedEvent(i.getId()));
 		}
 	}
 
@@ -345,8 +345,8 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 	public boolean containsContact(Transaction transaction, AuthorId remote,
 			AuthorId local) throws DbException {
 		T txn = unbox(transaction);
-		if (!db.containsLocalAuthor(txn, local))
-			throw new NoSuchLocalAuthorException();
+		if (!db.containsIdentity(txn, local))
+			throw new NoSuchIdentityException();
 		return db.containsContact(txn, remote, local);
 	}
 
@@ -358,10 +358,10 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 	}
 
 	@Override
-	public boolean containsLocalAuthor(Transaction transaction, AuthorId local)
+	public boolean containsIdentity(Transaction transaction, AuthorId a)
 			throws DbException {
 		T txn = unbox(transaction);
-		return db.containsLocalAuthor(txn, local);
+		return db.containsIdentity(txn, a);
 	}
 
 	@Override
@@ -505,8 +505,8 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 	public Collection<ContactId> getContacts(Transaction transaction,
 			AuthorId a) throws DbException {
 		T txn = unbox(transaction);
-		if (!db.containsLocalAuthor(txn, a))
-			throw new NoSuchLocalAuthorException();
+		if (!db.containsIdentity(txn, a))
+			throw new NoSuchIdentityException();
 		return db.getContacts(txn, a);
 	}
 
@@ -554,19 +554,19 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 	}
 
 	@Override
-	public LocalAuthor getLocalAuthor(Transaction transaction, AuthorId a)
+	public Identity getIdentity(Transaction transaction, AuthorId a)
 			throws DbException {
 		T txn = unbox(transaction);
-		if (!db.containsLocalAuthor(txn, a))
-			throw new NoSuchLocalAuthorException();
-		return db.getLocalAuthor(txn, a);
+		if (!db.containsIdentity(txn, a))
+			throw new NoSuchIdentityException();
+		return db.getIdentity(txn, a);
 	}
 
 	@Override
-	public Collection<LocalAuthor> getLocalAuthors(Transaction transaction)
+	public Collection<Identity> getIdentities(Transaction transaction)
 			throws DbException {
 		T txn = unbox(transaction);
-		return db.getLocalAuthors(txn);
+		return db.getIdentities(txn);
 	}
 
 	@Override
@@ -905,14 +905,14 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 	}
 
 	@Override
-	public void removeLocalAuthor(Transaction transaction, AuthorId a)
+	public void removeIdentity(Transaction transaction, AuthorId a)
 			throws DbException {
 		if (transaction.isReadOnly()) throw new IllegalArgumentException();
 		T txn = unbox(transaction);
-		if (!db.containsLocalAuthor(txn, a))
-			throw new NoSuchLocalAuthorException();
-		db.removeLocalAuthor(txn, a);
-		transaction.attach(new LocalAuthorRemovedEvent(a));
+		if (!db.containsIdentity(txn, a))
+			throw new NoSuchIdentityException();
+		db.removeIdentity(txn, a);
+		transaction.attach(new IdentityRemovedEvent(a));
 	}
 
 	@Override
@@ -1035,6 +1035,16 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		}
 	}
 
+	@Override
+	public void setHandshakeKeyPair(Transaction transaction, AuthorId local,
+			byte[] publicKey, byte[] privateKey) throws DbException {
+		if (transaction.isReadOnly()) throw new IllegalArgumentException();
+		T txn = unbox(transaction);
+		if (!db.containsIdentity(txn, local))
+			throw new NoSuchIdentityException();
+		db.setHandshakeKeyPair(txn, local, publicKey, privateKey);
+	}
+
 	@Override
 	public void setReorderingWindow(Transaction transaction,
 			TransportKeySetId k, TransportId t, long timePeriod, long base,

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

@@ -15,6 +15,7 @@ import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.db.MigrationListener;
 import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.identity.AuthorId;
+import org.briarproject.bramble.api.identity.Identity;
 import org.briarproject.bramble.api.identity.LocalAuthor;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.TransportId;
@@ -874,8 +875,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 	}
 
 	@Override
-	public void addLocalAuthor(Connection txn, LocalAuthor a)
-			throws DbException {
+	public void addIdentity(Connection txn, Identity i) throws DbException {
 		PreparedStatement ps = null;
 		try {
 			String sql = "INSERT INTO localAuthors"
@@ -883,16 +883,17 @@ abstract class JdbcDatabase implements Database<Connection> {
 					+ " handshakePublicKey, handshakePrivateKey, created)"
 					+ " VALUES (?, ?, ?, ?, ?, ?, ?, ?)";
 			ps = txn.prepareStatement(sql);
-			ps.setBytes(1, a.getId().getBytes());
-			ps.setInt(2, a.getFormatVersion());
-			ps.setString(3, a.getName());
-			ps.setBytes(4, a.getPublicKey());
-			ps.setBytes(5, a.getPrivateKey());
-			if (a.getHandshakePublicKey() == null) ps.setNull(6, BINARY);
-			else ps.setBytes(6, a.getHandshakePublicKey());
-			if (a.getHandshakePrivateKey() == null) ps.setNull(7, BINARY);
-			else ps.setBytes(7, a.getHandshakePrivateKey());
-			ps.setLong(8, a.getTimeCreated());
+			LocalAuthor local = i.getLocalAuthor();
+			ps.setBytes(1, local.getId().getBytes());
+			ps.setInt(2, local.getFormatVersion());
+			ps.setString(3, local.getName());
+			ps.setBytes(4, local.getPublicKey());
+			ps.setBytes(5, local.getPrivateKey());
+			if (i.getHandshakePublicKey() == null) ps.setNull(6, BINARY);
+			else ps.setBytes(6, i.getHandshakePublicKey());
+			if (i.getHandshakePrivateKey() == null) ps.setNull(7, BINARY);
+			else ps.setBytes(7, i.getHandshakePrivateKey());
+			ps.setLong(8, i.getTimeCreated());
 			int affected = ps.executeUpdate();
 			if (affected != 1) throw new DbStateException();
 			ps.close();
@@ -1248,7 +1249,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 	}
 
 	@Override
-	public boolean containsLocalAuthor(Connection txn, AuthorId a)
+	public boolean containsIdentity(Connection txn, AuthorId a)
 			throws DbException {
 		PreparedStatement ps = null;
 		ResultSet rs = null;
@@ -1660,41 +1661,6 @@ abstract class JdbcDatabase implements Database<Connection> {
 		}
 	}
 
-	@Override
-	public LocalAuthor getLocalAuthor(Connection txn, AuthorId a)
-			throws DbException {
-		PreparedStatement ps = null;
-		ResultSet rs = null;
-		try {
-			String sql = "SELECT formatVersion, name, publicKey, privateKey,"
-					+ " handshakePublicKey, handshakePrivateKey, created"
-					+ " FROM localAuthors"
-					+ " WHERE authorId = ?";
-			ps = txn.prepareStatement(sql);
-			ps.setBytes(1, a.getBytes());
-			rs = ps.executeQuery();
-			if (!rs.next()) throw new DbStateException();
-			int formatVersion = rs.getInt(1);
-			String name = rs.getString(2);
-			byte[] publicKey = rs.getBytes(3);
-			byte[] privateKey = rs.getBytes(4);
-			byte[] handshakePublicKey = rs.getBytes(5);
-			byte[] handshakePrivateKey = rs.getBytes(6);
-			long created = rs.getLong(7);
-			LocalAuthor localAuthor = new LocalAuthor(a, formatVersion, name,
-					publicKey, privateKey, handshakePublicKey,
-					handshakePrivateKey, created);
-			if (rs.next()) throw new DbStateException();
-			rs.close();
-			ps.close();
-			return localAuthor;
-		} catch (SQLException e) {
-			tryToClose(rs, LOG, WARNING);
-			tryToClose(ps, LOG, WARNING);
-			throw new DbException(e);
-		}
-	}
-
 	@Override
 	public Collection<HandshakeKeySet> getHandshakeKeys(Connection txn,
 			TransportId t) throws DbException {
@@ -1776,30 +1742,69 @@ abstract class JdbcDatabase implements Database<Connection> {
 	}
 
 	@Override
-	public Collection<LocalAuthor> getLocalAuthors(Connection txn)
+	public Identity getIdentity(Connection txn, AuthorId a) throws DbException {
+		PreparedStatement ps = null;
+		ResultSet rs = null;
+		try {
+			String sql = "SELECT formatVersion, name, publicKey, privateKey,"
+					+ " handshakePublicKey, handshakePrivateKey, created"
+					+ " FROM localAuthors"
+					+ " WHERE authorId = ?";
+			ps = txn.prepareStatement(sql);
+			ps.setBytes(1, a.getBytes());
+			rs = ps.executeQuery();
+			if (!rs.next()) throw new DbStateException();
+			int formatVersion = rs.getInt(1);
+			String name = rs.getString(2);
+			byte[] publicKey = rs.getBytes(3);
+			byte[] privateKey = rs.getBytes(4);
+			byte[] handshakePublicKey = rs.getBytes(5);
+			byte[] handshakePrivateKey = rs.getBytes(6);
+			long created = rs.getLong(7);
+			if (rs.next()) throw new DbStateException();
+			rs.close();
+			ps.close();
+			LocalAuthor local = new LocalAuthor(a, formatVersion, name,
+					publicKey, privateKey);
+			return new Identity(local, handshakePublicKey, handshakePrivateKey,
+					created);
+		} catch (SQLException e) {
+			tryToClose(rs, LOG, WARNING);
+			tryToClose(ps, LOG, WARNING);
+			throw new DbException(e);
+		}
+	}
+
+	@Override
+	public Collection<Identity> getIdentities(Connection txn)
 			throws DbException {
 		PreparedStatement ps = null;
 		ResultSet rs = null;
 		try {
 			String sql = "SELECT authorId, formatVersion, name, publicKey,"
-					+ " privateKey, created"
+					+ " privateKey, handshakePublicKey, handshakePrivateKey,"
+					+ " created"
 					+ " FROM localAuthors";
 			ps = txn.prepareStatement(sql);
 			rs = ps.executeQuery();
-			List<LocalAuthor> authors = new ArrayList<>();
+			List<Identity> identities = new ArrayList<>();
 			while (rs.next()) {
 				AuthorId authorId = new AuthorId(rs.getBytes(1));
 				int formatVersion = rs.getInt(2);
 				String name = rs.getString(3);
 				byte[] publicKey = rs.getBytes(4);
 				byte[] privateKey = rs.getBytes(5);
-				long created = rs.getLong(6);
-				authors.add(new LocalAuthor(authorId, formatVersion, name,
-						publicKey, privateKey, created));
+				byte[] handshakePublicKey = rs.getBytes(6);
+				byte[] handshakePrivateKey = rs.getBytes(7);
+				long created = rs.getLong(8);
+				LocalAuthor local = new LocalAuthor(authorId, formatVersion,
+						name, publicKey, privateKey);
+				identities.add(new Identity(local, handshakePublicKey,
+						handshakePrivateKey, created));
 			}
 			rs.close();
 			ps.close();
-			return authors;
+			return identities;
 		} catch (SQLException e) {
 			tryToClose(rs, LOG, WARNING);
 			tryToClose(ps, LOG, WARNING);
@@ -2958,8 +2963,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 	}
 
 	@Override
-	public void removeLocalAuthor(Connection txn, AuthorId a)
-			throws DbException {
+	public void removeIdentity(Connection txn, AuthorId a) throws DbException {
 		PreparedStatement ps = null;
 		try {
 			String sql = "DELETE FROM localAuthors WHERE authorId = ?";
@@ -3176,6 +3180,27 @@ abstract class JdbcDatabase implements Database<Connection> {
 		}
 	}
 
+	@Override
+	public void setHandshakeKeyPair(Connection txn, AuthorId local,
+			byte[] publicKey, byte[] privateKey) throws DbException {
+		PreparedStatement ps = null;
+		try {
+			String sql = "UPDATE localAuthors"
+					+ " SET handshakePublicKey = ?, handshakePrivateKey = ?"
+					+ " WHERE authorId = ?";
+			ps = txn.prepareStatement(sql);
+			ps.setBytes(1, publicKey);
+			ps.setBytes(2, privateKey);
+			ps.setBytes(3, local.getBytes());
+			int affected = ps.executeUpdate();
+			if (affected < 0 || affected > 1) throw new DbStateException();
+			ps.close();
+		} catch (SQLException e) {
+			tryToClose(ps, LOG, WARNING);
+			throw new DbException(e);
+		}
+	}
+
 	@Override
 	public void setMessageShared(Connection txn, MessageId m)
 			throws DbException {

bramble-core/src/main/java/org/briarproject/bramble/identity/AuthorFactoryImpl.java

@@ -1,12 +1,12 @@
 package org.briarproject.bramble.identity;
 
 import org.briarproject.bramble.api.crypto.CryptoComponent;
+import org.briarproject.bramble.api.crypto.KeyPair;
 import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.identity.AuthorFactory;
 import org.briarproject.bramble.api.identity.AuthorId;
 import org.briarproject.bramble.api.identity.LocalAuthor;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.util.ByteUtils;
 import org.briarproject.bramble.util.StringUtils;
 
@@ -22,12 +22,10 @@ import static org.briarproject.bramble.util.ByteUtils.INT_32_BYTES;
 class AuthorFactoryImpl implements AuthorFactory {
 
 	private final CryptoComponent crypto;
-	private final Clock clock;
 
 	@Inject
-	AuthorFactoryImpl(CryptoComponent crypto, Clock clock) {
+	AuthorFactoryImpl(CryptoComponent crypto) {
 		this.crypto = crypto;
-		this.clock = clock;
 	}
 
 	@Override
@@ -43,17 +41,12 @@ class AuthorFactoryImpl implements AuthorFactory {
 	}
 
 	@Override
-	public LocalAuthor createLocalAuthor(String name, byte[] publicKey,
-			byte[] privateKey) {
-		return createLocalAuthor(FORMAT_VERSION, name, publicKey, privateKey);
-	}
-
-	@Override
-	public LocalAuthor createLocalAuthor(int formatVersion, String name,
-			byte[] publicKey, byte[] privateKey) {
-		AuthorId id = getId(formatVersion, name, publicKey);
-		return new LocalAuthor(id, formatVersion, name, publicKey, privateKey,
-				clock.currentTimeMillis());
+	public LocalAuthor createLocalAuthor(String name) {
+		KeyPair signatureKeyPair = crypto.generateSignatureKeyPair();
+		byte[] publicKey = signatureKeyPair.getPublic().getEncoded();
+		byte[] privateKey = signatureKeyPair.getPrivate().getEncoded();
+		AuthorId id = getId(FORMAT_VERSION, name, publicKey);
+		return new LocalAuthor(id, FORMAT_VERSION, name, publicKey, privateKey);
 	}
 
 	private AuthorId getId(int formatVersion, String name, byte[] publicKey) {

bramble-core/src/main/java/org/briarproject/bramble/identity/IdentityManagerImpl.java

@@ -6,97 +6,164 @@ import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Transaction;
 import org.briarproject.bramble.api.identity.AuthorFactory;
+import org.briarproject.bramble.api.identity.Identity;
 import org.briarproject.bramble.api.identity.IdentityManager;
 import org.briarproject.bramble.api.identity.LocalAuthor;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager.OpenDatabaseHook;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.system.Clock;
 
+import java.util.Collection;
 import java.util.logging.Logger;
 
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.ThreadSafe;
 import javax.inject.Inject;
 
+import static java.util.logging.Logger.getLogger;
+import static org.briarproject.bramble.api.nullsafety.NullSafety.requireNonNull;
 import static org.briarproject.bramble.util.LogUtils.logDuration;
 import static org.briarproject.bramble.util.LogUtils.now;
 
 @ThreadSafe
 @NotNullByDefault
-class IdentityManagerImpl implements IdentityManager {
+class IdentityManagerImpl implements IdentityManager, OpenDatabaseHook {
 
 	private static final Logger LOG =
-			Logger.getLogger(IdentityManagerImpl.class.getName());
+			getLogger(IdentityManagerImpl.class.getName());
 
 	private final DatabaseComponent db;
 	private final CryptoComponent crypto;
 	private final AuthorFactory authorFactory;
+	private final Clock clock;
 
-	// The local author is immutable so we can cache it
+	/**
+	 * The user's identity, or null if no identity has been registered or
+	 * loaded. If non-null, this identity always has handshake keys.
+	 */
 	@Nullable
-	private volatile LocalAuthor cachedAuthor;
+	private volatile Identity cachedIdentity = null;
+
+	/**
+	 * True if {@code cachedIdentity} was registered via
+	 * {@link #registerIdentity(Identity)} and should be stored when
+	 * {@link #onDatabaseOpened(Transaction)} is called.
+	 */
+
+	private volatile boolean shouldStoreIdentity = false;
+
+	/**
+	 * True if the handshake keys in {@code cachedIdentity} were generated
+	 * when the identity was loaded and should be stored when
+	 * {@link #onDatabaseOpened(Transaction)} is called.
+	 */
+	private volatile boolean shouldStoreKeys = false;
 
 	@Inject
 	IdentityManagerImpl(DatabaseComponent db, CryptoComponent crypto,
-			AuthorFactory authorFactory) {
+			AuthorFactory authorFactory, Clock clock) {
 		this.db = db;
 		this.crypto = crypto;
 		this.authorFactory = authorFactory;
+		this.clock = clock;
 	}
 
 	@Override
-	public LocalAuthor createLocalAuthor(String name) {
+	public Identity createIdentity(String name) {
 		long start = now();
-		KeyPair keyPair = crypto.generateSignatureKeyPair();
-		byte[] publicKey = keyPair.getPublic().getEncoded();
-		byte[] privateKey = keyPair.getPrivate().getEncoded();
-		LocalAuthor localAuthor = authorFactory.createLocalAuthor(name,
-				publicKey, privateKey);
-		logDuration(LOG, "Creating local author", start);
-		return localAuthor;
+		LocalAuthor localAuthor = authorFactory.createLocalAuthor(name);
+		KeyPair handshakeKeyPair = crypto.generateAgreementKeyPair();
+		byte[] handshakePub = handshakeKeyPair.getPublic().getEncoded();
+		byte[] handshakePriv = handshakeKeyPair.getPrivate().getEncoded();
+		logDuration(LOG, "Creating identity", start);
+		return new Identity(localAuthor, handshakePub, handshakePriv,
+				clock.currentTimeMillis());
 	}
 
 	@Override
-	public void registerLocalAuthor(LocalAuthor a) {
-		cachedAuthor = a;
-		LOG.info("Local author registered");
+	public void registerIdentity(Identity i) {
+		if (!i.hasHandshakeKeyPair()) throw new IllegalArgumentException();
+		cachedIdentity = i;
+		shouldStoreIdentity = true;
+		LOG.info("Identity registered");
 	}
 
 	@Override
-	public void storeLocalAuthor() throws DbException {
-		LocalAuthor cached = cachedAuthor;
-		if (cached == null) {
-			LOG.info("No local author to store");
-			return;
+	public void onDatabaseOpened(Transaction txn) throws DbException {
+		Identity cached = getCachedIdentity(txn);
+		if (shouldStoreIdentity) {
+			// The identity was registered at startup - store it
+			db.addIdentity(txn, cached);
+			LOG.info("Identity stored");
+		} else if (shouldStoreKeys) {
+			// Handshake keys were generated when loading the identity -
+			// store them
+			byte[] handshakePub =
+					requireNonNull(cached.getHandshakePublicKey());
+			byte[] handshakePriv =
+					requireNonNull(cached.getHandshakePrivateKey());
+			db.setHandshakeKeyPair(txn, cached.getId(), handshakePub,
+					handshakePriv);
+			LOG.info("Handshake key pair stored");
 		}
-		db.transaction(false, txn -> db.addLocalAuthor(txn, cached));
-		LOG.info("Local author stored");
 	}
 
 	@Override
 	public LocalAuthor getLocalAuthor() throws DbException {
-		if (cachedAuthor == null) {
-			cachedAuthor =
-					db.transactionWithResult(true, this::loadLocalAuthor);
-			LOG.info("Local author loaded");
-		}
-		LocalAuthor cached = cachedAuthor;
-		if (cached == null) throw new AssertionError();
-		return cached;
+		Identity cached = cachedIdentity;
+		if (cached == null)
+			cached = db.transactionWithResult(true, this::getCachedIdentity);
+		return cached.getLocalAuthor();
 	}
 
-
 	@Override
 	public LocalAuthor getLocalAuthor(Transaction txn) throws DbException {
-		if (cachedAuthor == null) {
-			cachedAuthor = loadLocalAuthor(txn);
-			LOG.info("Local author loaded");
-		}
-		LocalAuthor cached = cachedAuthor;
-		if (cached == null) throw new AssertionError();
+		return getCachedIdentity(txn).getLocalAuthor();
+	}
+
+	@Override
+	public byte[][] getHandshakeKeys(Transaction txn) throws DbException {
+		Identity cached = getCachedIdentity(txn);
+		return new byte[][] {
+				cached.getHandshakePublicKey(),
+				cached.getHandshakePrivateKey()
+		};
+	}
+
+	/**
+	 * Loads the identity if necessary and returns it. If
+	 * {@code cachedIdentity} was not already set by calling
+	 * {@link #registerIdentity(Identity)}, this method sets it. If
+	 * {@code cachedIdentity} was already set, either by calling
+	 * {@link #registerIdentity(Identity)} or by a previous call to this
+	 * method, then this method returns the cached identity without hitting
+	 * the database.
+	 */
+	private Identity getCachedIdentity(Transaction txn) throws DbException {
+		Identity cached = cachedIdentity;
+		if (cached == null)
+			cachedIdentity = cached = loadIdentityWithKeyPair(txn);
 		return cached;
 	}
 
-	private LocalAuthor loadLocalAuthor(Transaction txn) throws DbException {
-		return db.getLocalAuthors(txn).iterator().next();
+	/**
+	 * Loads and returns the identity, generating a handshake key pair if
+	 * necessary and setting {@code shouldStoreKeys} if a handshake key pair
+	 * was generated.
+	 */
+	private Identity loadIdentityWithKeyPair(Transaction txn)
+			throws DbException {
+		Collection<Identity> identities = db.getIdentities(txn);
+		if (identities.size() != 1) throw new DbException();
+		Identity i = identities.iterator().next();
+		LOG.info("Identity loaded");
+		if (i.hasHandshakeKeyPair()) return i;
+		KeyPair handshakeKeyPair = crypto.generateAgreementKeyPair();
+		byte[] handshakePub = handshakeKeyPair.getPublic().getEncoded();
+		byte[] handshakePriv = handshakeKeyPair.getPrivate().getEncoded();
+		LOG.info("Handshake key pair generated");
+		shouldStoreKeys = true;
+		return new Identity(i.getLocalAuthor(), handshakePub, handshakePriv,
+				i.getTimeCreated());
 	}
-
 }

bramble-core/src/main/java/org/briarproject/bramble/identity/IdentityModule.java

@@ -2,6 +2,7 @@ package org.briarproject.bramble.identity;
 
 import org.briarproject.bramble.api.identity.AuthorFactory;
 import org.briarproject.bramble.api.identity.IdentityManager;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager;
 
 import javax.inject.Inject;
 import javax.inject.Singleton;
@@ -24,8 +25,9 @@ public class IdentityModule {
 
 	@Provides
 	@Singleton
-	IdentityManager provideIdentityManager(
+	IdentityManager provideIdentityManager(LifecycleManager lifecycleManager,
 			IdentityManagerImpl identityManager) {
+		lifecycleManager.registerOpenDatabaseHook(identityManager);
 		return identityManager;
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/lifecycle/LifecycleManagerImpl.java

@@ -7,13 +7,11 @@ import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.MigrationListener;
 import org.briarproject.bramble.api.event.EventBus;
-import org.briarproject.bramble.api.identity.IdentityManager;
 import org.briarproject.bramble.api.lifecycle.LifecycleManager;
 import org.briarproject.bramble.api.lifecycle.Service;
 import org.briarproject.bramble.api.lifecycle.ServiceException;
 import org.briarproject.bramble.api.lifecycle.event.LifecycleEvent;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.Client;
 
 import java.util.List;
 import java.util.concurrent.CopyOnWriteArrayList;
@@ -28,6 +26,7 @@ import javax.inject.Inject;
 import static java.util.logging.Level.FINE;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
+import static java.util.logging.Logger.getLogger;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.LifecycleState.COMPACTING_DATABASE;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.LifecycleState.MIGRATING_DATABASE;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.LifecycleState.RUNNING;
@@ -49,14 +48,13 @@ import static org.briarproject.bramble.util.LogUtils.now;
 class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 
 	private static final Logger LOG =
-			Logger.getLogger(LifecycleManagerImpl.class.getName());
+			getLogger(LifecycleManagerImpl.class.getName());
 
 	private final DatabaseComponent db;
 	private final EventBus eventBus;
 	private final List<Service> services;
-	private final List<Client> clients;
+	private final List<OpenDatabaseHook> openDatabaseHooks;
 	private final List<ExecutorService> executors;
-	private final IdentityManager identityManager;
 	private final Semaphore startStopSemaphore = new Semaphore(1);
 	private final CountDownLatch dbLatch = new CountDownLatch(1);
 	private final CountDownLatch startupLatch = new CountDownLatch(1);
@@ -65,13 +63,11 @@ class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 	private volatile LifecycleState state = STARTING;
 
 	@Inject
-	LifecycleManagerImpl(DatabaseComponent db, EventBus eventBus,
-			IdentityManager identityManager) {
+	LifecycleManagerImpl(DatabaseComponent db, EventBus eventBus) {
 		this.db = db;
 		this.eventBus = eventBus;
-		this.identityManager = identityManager;
 		services = new CopyOnWriteArrayList<>();
-		clients = new CopyOnWriteArrayList<>();
+		openDatabaseHooks = new CopyOnWriteArrayList<>();
 		executors = new CopyOnWriteArrayList<>();
 	}
 
@@ -83,10 +79,12 @@ class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 	}
 
 	@Override
-	public void registerClient(Client c) {
-		if (LOG.isLoggable(INFO))
-			LOG.info("Registering client " + c.getClass().getSimpleName());
-		clients.add(c);
+	public void registerOpenDatabaseHook(OpenDatabaseHook hook) {
+		if (LOG.isLoggable(INFO)) {
+			LOG.info("Registering open database hook "
+					+ hook.getClass().getSimpleName());
+		}
+		openDatabaseHooks.add(hook);
 	}
 
 	@Override
@@ -102,28 +100,28 @@ class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 			return ALREADY_RUNNING;
 		}
 		try {
-			LOG.info("Starting services");
+			LOG.info("Opening database");
 			long start = now();
-
 			boolean reopened = db.open(dbKey, this);
 			if (reopened) logDuration(LOG, "Reopening database", start);
 			else logDuration(LOG, "Creating database", start);
-			identityManager.storeLocalAuthor();
 
+			db.transaction(false, txn -> {
+				for (OpenDatabaseHook hook : openDatabaseHooks) {
+					long start1 = now();
+					hook.onDatabaseOpened(txn);
+					if (LOG.isLoggable(FINE)) {
+						logDuration(LOG, "Calling open database hook "
+								+ hook.getClass().getSimpleName(), start1);
+					}
+				}
+			});
+
+			LOG.info("Starting services");
 			state = STARTING_SERVICES;
 			dbLatch.countDown();
 			eventBus.broadcast(new LifecycleEvent(STARTING_SERVICES));
 
-			db.transaction(false, txn -> {
-				for (Client c : clients) {
-					long start1 = now();
-					c.createLocalState(txn);
-					if (LOG.isLoggable(FINE)) {
-						logDuration(LOG, "Starting client "
-								+ c.getClass().getSimpleName(), start1);
-					}
-				}
-			});
 			for (Service s : services) {
 				start = now();
 				s.startService();

bramble-core/src/main/java/org/briarproject/bramble/properties/PropertiesModule.java

@@ -48,7 +48,7 @@ public class PropertiesModule {
 			ValidationManager validationManager, ContactManager contactManager,
 			ClientVersioningManager clientVersioningManager,
 			TransportPropertyManagerImpl transportPropertyManager) {
-		lifecycleManager.registerClient(transportPropertyManager);
+		lifecycleManager.registerOpenDatabaseHook(transportPropertyManager);
 		validationManager.registerIncomingMessageHook(CLIENT_ID, MAJOR_VERSION,
 				transportPropertyManager);
 		contactManager.registerContactHook(transportPropertyManager);

bramble-core/src/main/java/org/briarproject/bramble/properties/TransportPropertyManagerImpl.java

@@ -13,11 +13,11 @@ import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.db.Transaction;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager.OpenDatabaseHook;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.properties.TransportProperties;
 import org.briarproject.bramble.api.properties.TransportPropertyManager;
-import org.briarproject.bramble.api.sync.Client;
 import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.Group.Visibility;
 import org.briarproject.bramble.api.sync.GroupId;
@@ -40,7 +40,8 @@ import javax.inject.Inject;
 @Immutable
 @NotNullByDefault
 class TransportPropertyManagerImpl implements TransportPropertyManager,
-		Client, ContactHook, ClientVersioningHook, IncomingMessageHook {
+		OpenDatabaseHook, ContactHook, ClientVersioningHook,
+		IncomingMessageHook {
 
 	private final DatabaseComponent db;
 	private final ClientHelper clientHelper;
@@ -67,7 +68,7 @@ class TransportPropertyManagerImpl implements TransportPropertyManager,
 	}
 
 	@Override
-	public void createLocalState(Transaction txn) throws DbException {
+	public void onDatabaseOpened(Transaction txn) throws DbException {
 		if (db.containsGroup(txn, localGroup.getId())) return;
 		db.addGroup(txn, localGroup);
 		// Set things up for any pre-existing contacts

bramble-core/src/main/java/org/briarproject/bramble/versioning/ClientVersioningManagerImpl.java

@@ -12,10 +12,10 @@ import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.db.Transaction;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager.OpenDatabaseHook;
 import org.briarproject.bramble.api.lifecycle.Service;
 import org.briarproject.bramble.api.lifecycle.ServiceException;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.Client;
 import org.briarproject.bramble.api.sync.ClientId;
 import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.Group.Visibility;
@@ -53,8 +53,8 @@ import static org.briarproject.bramble.versioning.ClientVersioningConstants.MSG_
 import static org.briarproject.bramble.versioning.ClientVersioningConstants.MSG_KEY_UPDATE_VERSION;
 
 @NotNullByDefault
-class ClientVersioningManagerImpl implements ClientVersioningManager, Client,
-		Service, ContactHook, IncomingMessageHook {
+class ClientVersioningManagerImpl implements ClientVersioningManager,
+		Service, OpenDatabaseHook, ContactHook, IncomingMessageHook {
 
 	private final DatabaseComponent db;
 	private final ClientHelper clientHelper;
@@ -124,7 +124,7 @@ class ClientVersioningManagerImpl implements ClientVersioningManager, Client,
 	}
 
 	@Override
-	public void createLocalState(Transaction txn) throws DbException {
+	public void onDatabaseOpened(Transaction txn) throws DbException {
 		if (db.containsGroup(txn, localGroup.getId())) return;
 		db.addGroup(txn, localGroup);
 		// Set things up for any pre-existing contacts

bramble-core/src/main/java/org/briarproject/bramble/versioning/VersioningModule.java

@@ -34,7 +34,7 @@ public class VersioningModule {
 			ClientVersioningManagerImpl clientVersioningManager,
 			LifecycleManager lifecycleManager, ContactManager contactManager,
 			ValidationManager validationManager) {
-		lifecycleManager.registerClient(clientVersioningManager);
+		lifecycleManager.registerOpenDatabaseHook(clientVersioningManager);
 		lifecycleManager.registerService(clientVersioningManager);
 		contactManager.registerContactHook(clientVersioningManager);
 		validationManager.registerIncomingMessageHook(CLIENT_ID, MAJOR_VERSION,

bramble-core/src/test/java/org/briarproject/bramble/account/AccountManagerImplTest.java

@@ -3,6 +3,7 @@ package org.briarproject.bramble.account;
 import org.briarproject.bramble.api.crypto.CryptoComponent;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseConfig;
+import org.briarproject.bramble.api.identity.Identity;
 import org.briarproject.bramble.api.identity.IdentityManager;
 import org.briarproject.bramble.api.identity.LocalAuthor;
 import org.briarproject.bramble.test.BrambleMockTestCase;
@@ -24,7 +25,7 @@ import static junit.framework.Assert.assertFalse;
 import static junit.framework.Assert.assertNull;
 import static junit.framework.Assert.assertTrue;
 import static org.briarproject.bramble.test.TestUtils.deleteTestDirectory;
-import static org.briarproject.bramble.test.TestUtils.getLocalAuthor;
+import static org.briarproject.bramble.test.TestUtils.getIdentity;
 import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
 import static org.briarproject.bramble.test.TestUtils.getSecretKey;
 import static org.briarproject.bramble.test.TestUtils.getTestDirectory;
@@ -47,7 +48,8 @@ public class AccountManagerImplTest extends BrambleMockTestCase {
 	private final String encryptedKeyHex = toHexString(encryptedKey);
 	private final byte[] newEncryptedKey = getRandomBytes(123);
 	private final String newEncryptedKeyHex = toHexString(newEncryptedKey);
-	private final LocalAuthor localAuthor = getLocalAuthor();
+	private final Identity identity = getIdentity();
+	private final LocalAuthor localAuthor = identity.getLocalAuthor();
 	private final String authorName = localAuthor.getName();
 	private final String password = getRandomString(10);
 	private final String newPassword = getRandomString(10);
@@ -251,9 +253,9 @@ public class AccountManagerImplTest extends BrambleMockTestCase {
 	@Test
 	public void testCreateAccountStoresDbKey() throws Exception {
 		context.checking(new Expectations() {{
-			oneOf(identityManager).createLocalAuthor(authorName);
-			will(returnValue(localAuthor));
-			oneOf(identityManager).registerLocalAuthor(localAuthor);
+			oneOf(identityManager).createIdentity(authorName);
+			will(returnValue(identity));
+			oneOf(identityManager).registerIdentity(identity);
 			oneOf(crypto).generateSecretKey();
 			will(returnValue(key));
 			oneOf(crypto).encryptWithPassword(key.getBytes(), password);

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

@@ -11,16 +11,17 @@ import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.db.NoSuchContactException;
 import org.briarproject.bramble.api.db.NoSuchGroupException;
-import org.briarproject.bramble.api.db.NoSuchLocalAuthorException;
+import org.briarproject.bramble.api.db.NoSuchIdentityException;
 import org.briarproject.bramble.api.db.NoSuchMessageException;
 import org.briarproject.bramble.api.db.NoSuchPendingContactException;
 import org.briarproject.bramble.api.db.NoSuchTransportException;
 import org.briarproject.bramble.api.event.Event;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.identity.Author;
+import org.briarproject.bramble.api.identity.Identity;
 import org.briarproject.bramble.api.identity.LocalAuthor;
-import org.briarproject.bramble.api.identity.event.LocalAuthorAddedEvent;
-import org.briarproject.bramble.api.identity.event.LocalAuthorRemovedEvent;
+import org.briarproject.bramble.api.identity.event.IdentityAddedEvent;
+import org.briarproject.bramble.api.identity.event.IdentityRemovedEvent;
 import org.briarproject.bramble.api.lifecycle.ShutdownManager;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.settings.Settings;
@@ -65,6 +66,7 @@ import java.util.concurrent.atomic.AtomicReference;
 import static java.util.Arrays.asList;
 import static java.util.Collections.emptyMap;
 import static java.util.Collections.singletonList;
+import static org.briarproject.bramble.api.crypto.CryptoConstants.MAX_AGREEMENT_PUBLIC_KEY_BYTES;
 import static org.briarproject.bramble.api.sync.Group.Visibility.INVISIBLE;
 import static org.briarproject.bramble.api.sync.Group.Visibility.SHARED;
 import static org.briarproject.bramble.api.sync.Group.Visibility.VISIBLE;
@@ -77,8 +79,9 @@ import static org.briarproject.bramble.test.TestUtils.getAuthor;
 import static org.briarproject.bramble.test.TestUtils.getClientId;
 import static org.briarproject.bramble.test.TestUtils.getContact;
 import static org.briarproject.bramble.test.TestUtils.getGroup;
-import static org.briarproject.bramble.test.TestUtils.getLocalAuthor;
+import static org.briarproject.bramble.test.TestUtils.getIdentity;
 import static org.briarproject.bramble.test.TestUtils.getMessage;
+import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
 import static org.briarproject.bramble.test.TestUtils.getRandomId;
 import static org.briarproject.bramble.test.TestUtils.getSecretKey;
 import static org.briarproject.bramble.test.TestUtils.getTransportId;
@@ -104,6 +107,7 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 	private final GroupId groupId;
 	private final Group group;
 	private final Author author;
+	private final Identity identity;
 	private final LocalAuthor localAuthor;
 	private final String alias;
 	private final Message message, message1;
@@ -122,7 +126,8 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 		group = getGroup(clientId, majorVersion);
 		groupId = group.getId();
 		author = getAuthor();
-		localAuthor = getLocalAuthor();
+		identity = getIdentity();
+		localAuthor = identity.getLocalAuthor();
 		message = getMessage(groupId);
 		message1 = getMessage(groupId);
 		messageId = message.getId();
@@ -157,15 +162,15 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 			// startTransaction()
 			oneOf(database).startTransaction();
 			will(returnValue(txn));
-			// registerLocalAuthor()
-			oneOf(database).containsLocalAuthor(txn, localAuthor.getId());
+			// addIdentity()
+			oneOf(database).containsIdentity(txn, localAuthor.getId());
 			will(returnValue(false));
-			oneOf(database).addLocalAuthor(txn, localAuthor);
-			oneOf(eventBus).broadcast(with(any(LocalAuthorAddedEvent.class)));
+			oneOf(database).addIdentity(txn, identity);
+			oneOf(eventBus).broadcast(with(any(IdentityAddedEvent.class)));
 			// addContact()
-			oneOf(database).containsLocalAuthor(txn, localAuthor.getId());
+			oneOf(database).containsIdentity(txn, localAuthor.getId());
 			will(returnValue(true));
-			oneOf(database).containsLocalAuthor(txn, author.getId());
+			oneOf(database).containsIdentity(txn, author.getId());
 			will(returnValue(false));
 			oneOf(database).containsContact(txn, author.getId(),
 					localAuthor.getId());
@@ -201,11 +206,11 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 			will(returnValue(true));
 			oneOf(database).removeContact(txn, contactId);
 			oneOf(eventBus).broadcast(with(any(ContactRemovedEvent.class)));
-			// removeLocalAuthor()
-			oneOf(database).containsLocalAuthor(txn, localAuthor.getId());
+			// removeIdentity()
+			oneOf(database).containsIdentity(txn, localAuthor.getId());
 			will(returnValue(true));
-			oneOf(database).removeLocalAuthor(txn, localAuthor.getId());
-			oneOf(eventBus).broadcast(with(any(LocalAuthorRemovedEvent.class)));
+			oneOf(database).removeIdentity(txn, localAuthor.getId());
+			oneOf(eventBus).broadcast(with(any(IdentityRemovedEvent.class)));
 			// endTransaction()
 			oneOf(database).commitTransaction(txn);
 			// close()
@@ -216,7 +221,7 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 
 		assertFalse(db.open(key, null));
 		db.transaction(false, transaction -> {
-			db.addLocalAuthor(transaction, localAuthor);
+			db.addIdentity(transaction, identity);
 			assertEquals(contactId, db.addContact(transaction, author,
 					localAuthor.getId(), true));
 			assertEquals(singletonList(contact),
@@ -227,7 +232,7 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 					db.getGroups(transaction, clientId, majorVersion));
 			db.removeGroup(transaction, group);
 			db.removeContact(transaction, contactId);
-			db.removeLocalAuthor(transaction, localAuthor.getId());
+			db.removeIdentity(transaction, localAuthor.getId());
 		});
 		db.close();
 	}
@@ -432,16 +437,15 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 	}
 
 	@Test
-	public void testVariousMethodsThrowExceptionIfLocalAuthorIsMissing()
+	public void testVariousMethodsThrowExceptionIfIdentityIsMissing()
 			throws Exception {
 		context.checking(new Expectations() {{
-			// Check whether the pseudonym is in the DB (which it's not)
-			exactly(3).of(database).startTransaction();
+			// Check whether the identity is in the DB (which it's not)
+			exactly(4).of(database).startTransaction();
 			will(returnValue(txn));
-			exactly(3).of(database).containsLocalAuthor(txn,
-					localAuthor.getId());
+			exactly(4).of(database).containsIdentity(txn, localAuthor.getId());
 			will(returnValue(false));
-			exactly(3).of(database).abortTransaction(txn);
+			exactly(4).of(database).abortTransaction(txn);
 		}});
 		DatabaseComponent db = createDatabaseComponent(database, eventBus,
 				eventExecutor, shutdownManager);
@@ -451,23 +455,34 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 					db.addContact(transaction, author, localAuthor.getId(),
 							true));
 			fail();
-		} catch (NoSuchLocalAuthorException expected) {
+		} catch (NoSuchIdentityException expected) {
 			// Expected
 		}
 
 		try {
 			db.transaction(false, transaction ->
-					db.getLocalAuthor(transaction, localAuthor.getId()));
+					db.getIdentity(transaction, localAuthor.getId()));
 			fail();
-		} catch (NoSuchLocalAuthorException expected) {
+		} catch (NoSuchIdentityException expected) {
 			// Expected
 		}
 
 		try {
 			db.transaction(false, transaction ->
-					db.removeLocalAuthor(transaction, localAuthor.getId()));
+					db.removeIdentity(transaction, localAuthor.getId()));
 			fail();
-		} catch (NoSuchLocalAuthorException expected) {
+		} catch (NoSuchIdentityException expected) {
+			// Expected
+		}
+
+		try {
+			byte[] publicKey = getRandomBytes(MAX_AGREEMENT_PUBLIC_KEY_BYTES);
+			byte[] privateKey = getRandomBytes(123);
+			db.transaction(false, transaction ->
+					db.setHandshakeKeyPair(transaction, localAuthor.getId(),
+							publicKey, privateKey));
+			fail();
+		} catch (NoSuchIdentityException expected) {
 			// Expected
 		}
 	}
@@ -1403,10 +1418,10 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 		context.checking(new Expectations() {{
 			oneOf(database).startTransaction();
 			will(returnValue(txn));
-			oneOf(database).containsLocalAuthor(txn, localAuthor.getId());
+			oneOf(database).containsIdentity(txn, localAuthor.getId());
 			will(returnValue(true));
 			// Contact is a local identity
-			oneOf(database).containsLocalAuthor(txn, author.getId());
+			oneOf(database).containsIdentity(txn, author.getId());
 			will(returnValue(true));
 			oneOf(database).abortTransaction(txn);
 		}});
@@ -1429,9 +1444,9 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 		context.checking(new Expectations() {{
 			oneOf(database).startTransaction();
 			will(returnValue(txn));
-			oneOf(database).containsLocalAuthor(txn, localAuthor.getId());
+			oneOf(database).containsIdentity(txn, localAuthor.getId());
 			will(returnValue(true));
-			oneOf(database).containsLocalAuthor(txn, author.getId());
+			oneOf(database).containsIdentity(txn, author.getId());
 			will(returnValue(false));
 			// Contact already exists for this local identity
 			oneOf(database).containsContact(txn, author.getId(),
@@ -1454,7 +1469,6 @@ public class DatabaseComponentImplTest extends BrambleMockTestCase {
 	}
 
 	@Test
-	@SuppressWarnings("unchecked")
 	public void testMessageDependencies() throws Exception {
 		int shutdownHandle = 12345;
 		MessageId messageId2 = new MessageId(getRandomId());

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

@@ -5,6 +5,7 @@ import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.identity.AuthorId;
+import org.briarproject.bramble.api.identity.Identity;
 import org.briarproject.bramble.api.identity.LocalAuthor;
 import org.briarproject.bramble.api.sync.ClientId;
 import org.briarproject.bramble.api.sync.Group;
@@ -37,7 +38,7 @@ import static org.briarproject.bramble.api.sync.validation.MessageState.DELIVERE
 import static org.briarproject.bramble.test.TestUtils.deleteTestDirectory;
 import static org.briarproject.bramble.test.TestUtils.getAuthor;
 import static org.briarproject.bramble.test.TestUtils.getGroup;
-import static org.briarproject.bramble.test.TestUtils.getLocalAuthor;
+import static org.briarproject.bramble.test.TestUtils.getIdentity;
 import static org.briarproject.bramble.test.TestUtils.getMessage;
 import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
 import static org.briarproject.bramble.test.TestUtils.getRandomId;
@@ -161,11 +162,11 @@ public abstract class DatabasePerformanceTest extends BrambleTestCase {
 	}
 
 	@Test
-	public void testContainsLocalAuthor() throws Exception {
-		String name = "containsLocalAuthor(T, AuthorId)";
+	public void testContainsIdentity() throws Exception {
+		String name = "containsIdentity(T, AuthorId)";
 		benchmark(name, db -> {
 			Connection txn = db.startTransaction();
-			db.containsLocalAuthor(txn, localAuthor.getId());
+			db.containsIdentity(txn, localAuthor.getId());
 			db.commitTransaction(txn);
 		});
 	}
@@ -295,21 +296,21 @@ public abstract class DatabasePerformanceTest extends BrambleTestCase {
 	}
 
 	@Test
-	public void testGetLocalAuthor() throws Exception {
-		String name = "getLocalAuthor(T, AuthorId)";
+	public void testGetIdentity() throws Exception {
+		String name = "getIdentity(T, AuthorId)";
 		benchmark(name, db -> {
 			Connection txn = db.startTransaction();
-			db.getLocalAuthor(txn, localAuthor.getId());
+			db.getIdentity(txn, localAuthor.getId());
 			db.commitTransaction(txn);
 		});
 	}
 
 	@Test
-	public void testGetLocalAuthors() throws Exception {
-		String name = "getLocalAuthors(T)";
+	public void testGetIdentities() throws Exception {
+		String name = "getIdentities(T)";
 		benchmark(name, db -> {
 			Connection txn = db.startTransaction();
-			db.getLocalAuthors(txn);
+			db.getIdentities(txn);
 			db.commitTransaction(txn);
 		});
 	}
@@ -531,7 +532,8 @@ public abstract class DatabasePerformanceTest extends BrambleTestCase {
 	}
 
 	void populateDatabase(Database<Connection> db) throws DbException {
-		localAuthor = getLocalAuthor();
+		Identity identity = getIdentity();
+		localAuthor = identity.getLocalAuthor();
 		clientIds = new ArrayList<>();
 		contacts = new ArrayList<>();
 		groups = new ArrayList<>();
@@ -543,7 +545,7 @@ public abstract class DatabasePerformanceTest extends BrambleTestCase {
 		for (int i = 0; i < CLIENTS; i++) clientIds.add(getClientId());
 
 		Connection txn = db.startTransaction();
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		for (int i = 0; i < CONTACTS; i++) {
 			ContactId c = db.addContact(txn, getAuthor(), localAuthor.getId(),
 					random.nextBoolean());

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

@@ -9,6 +9,7 @@ import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.MessageDeletedException;
 import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.identity.Author;
+import org.briarproject.bramble.api.identity.Identity;
 import org.briarproject.bramble.api.identity.LocalAuthor;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.settings.Settings;
@@ -57,6 +58,7 @@ import static java.util.Collections.singletonList;
 import static java.util.Collections.singletonMap;
 import static java.util.concurrent.TimeUnit.SECONDS;
 import static org.briarproject.bramble.api.contact.PendingContactState.FAILED;
+import static org.briarproject.bramble.api.crypto.CryptoConstants.MAX_AGREEMENT_PUBLIC_KEY_BYTES;
 import static org.briarproject.bramble.api.db.Metadata.REMOVE;
 import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_AUTHOR_NAME_LENGTH;
 import static org.briarproject.bramble.api.sync.Group.Visibility.INVISIBLE;
@@ -73,9 +75,10 @@ import static org.briarproject.bramble.test.TestUtils.deleteTestDirectory;
 import static org.briarproject.bramble.test.TestUtils.getAuthor;
 import static org.briarproject.bramble.test.TestUtils.getClientId;
 import static org.briarproject.bramble.test.TestUtils.getGroup;
-import static org.briarproject.bramble.test.TestUtils.getLocalAuthor;
+import static org.briarproject.bramble.test.TestUtils.getIdentity;
 import static org.briarproject.bramble.test.TestUtils.getMessage;
 import static org.briarproject.bramble.test.TestUtils.getPendingContact;
+import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
 import static org.briarproject.bramble.test.TestUtils.getRandomId;
 import static org.briarproject.bramble.test.TestUtils.getSecretKey;
 import static org.briarproject.bramble.test.TestUtils.getTestDirectory;
@@ -103,6 +106,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 	private final int majorVersion;
 	private final Group group;
 	private final Author author;
+	private final Identity identity;
 	private final LocalAuthor localAuthor;
 	private final Message message;
 	private final MessageId messageId;
@@ -119,7 +123,8 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		group = getGroup(clientId, majorVersion);
 		groupId = group.getId();
 		author = getAuthor();
-		localAuthor = getLocalAuthor();
+		identity = getIdentity();
+		localAuthor = identity.getLocalAuthor();
 		message = getMessage(groupId);
 		messageId = message.getId();
 		transportId = getTransportId();
@@ -145,7 +150,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Database<Connection> db = open(false);
 		Connection txn = db.startTransaction();
 		assertFalse(db.containsContact(txn, contactId));
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		assertTrue(db.containsContact(txn, contactId));
@@ -208,7 +213,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact, a shared group and a shared message
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addGroup(txn, group);
@@ -239,7 +244,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact, a shared group and a shared but unvalidated message
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addGroup(txn, group);
@@ -284,7 +289,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact, an invisible group and a shared message
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addGroup(txn, group);
@@ -335,7 +340,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact, a shared group and an unshared message
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addGroup(txn, group);
@@ -366,7 +371,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact, a shared group and a shared message
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addGroup(txn, group);
@@ -393,7 +398,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact and a visible group
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addGroup(txn, group);
@@ -434,7 +439,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact, a shared group and a shared message
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addGroup(txn, group);
@@ -566,7 +571,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact and a shared group
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addGroup(txn, group);
@@ -586,7 +591,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 
@@ -604,7 +609,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact, an invisible group and a message
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addGroup(txn, group);
@@ -623,7 +628,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact and a group
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addGroup(txn, group);
@@ -675,7 +680,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		assertEquals(emptyList(), db.getTransportKeys(txn, transportId));
 
 		// Add the contact, the transport and the transport keys
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addTransport(txn, transportId, 123);
@@ -776,7 +781,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		assertEquals(emptyList(), db.getHandshakeKeys(txn, transportId));
 
 		// Add the contact, the transport and the handshake keys
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addTransport(txn, transportId, 123);
@@ -929,7 +934,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add the contact, transport and transport keys
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addTransport(txn, transportId, 123);
@@ -973,7 +978,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add the contact, transport and handshake keys
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addTransport(txn, transportId, 123);
@@ -1020,7 +1025,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add the contact, transport and transport keys
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addTransport(txn, transportId, 123);
@@ -1067,7 +1072,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add the contact, transport and handshake keys
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addTransport(txn, transportId, 123);
@@ -1109,14 +1114,15 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Database<Connection> db = open(false);
 		Connection txn = db.startTransaction();
 
-		// Add a local author - no contacts should be associated
-		db.addLocalAuthor(txn, localAuthor);
+		// Add an identity for a local author - no contacts should be
+		// associated
+		db.addIdentity(txn, identity);
 
 		// Add a contact associated with the local author
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 
-		// Ensure contact is returned from database by Author ID
+		// Ensure contact is returned from database by author ID
 		Collection<Contact> contacts =
 				db.getContactsByAuthorId(txn, author.getId());
 		assertEquals(1, contacts.size());
@@ -1136,8 +1142,9 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Database<Connection> db = open(false);
 		Connection txn = db.startTransaction();
 
-		// Add a local author - no contacts should be associated
-		db.addLocalAuthor(txn, localAuthor);
+		// Add an identity for a local author - no contacts should be
+		// associated
+		db.addIdentity(txn, identity);
 		Collection<ContactId> contacts =
 				db.getContacts(txn, localAuthor.getId());
 		assertEquals(emptyList(), contacts);
@@ -1148,8 +1155,8 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		contacts = db.getContacts(txn, localAuthor.getId());
 		assertEquals(singletonList(contactId), contacts);
 
-		// Remove the local author - the contact should be removed
-		db.removeLocalAuthor(txn, localAuthor.getId());
+		// Remove the identity - the contact should be removed
+		db.removeIdentity(txn, localAuthor.getId());
 		contacts = db.getContacts(txn, localAuthor.getId());
 		assertEquals(emptyList(), contacts);
 		assertFalse(db.containsContact(txn, contactId));
@@ -1164,7 +1171,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact - initially there should be no offered messages
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		assertEquals(0, db.countOfferedMessages(txn, contactId));
@@ -1748,7 +1755,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact, a shared group and a shared message
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addGroup(txn, group);
@@ -1850,14 +1857,15 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 	@Test
 	public void testDifferentLocalAuthorsCanHaveTheSameContact()
 			throws Exception {
-		LocalAuthor localAuthor1 = getLocalAuthor();
+		Identity identity1 = getIdentity();
+		LocalAuthor localAuthor1 = identity1.getLocalAuthor();
 
 		Database<Connection> db = open(false);
 		Connection txn = db.startTransaction();
 
-		// Add two local authors
-		db.addLocalAuthor(txn, localAuthor);
-		db.addLocalAuthor(txn, localAuthor1);
+		// Add identities for two local authors
+		db.addIdentity(txn, identity);
+		db.addIdentity(txn, identity1);
 
 		// Add the same contact for each local author
 		ContactId contactId =
@@ -1881,7 +1889,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact, a shared group and a shared message
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addGroup(txn, group);
@@ -1935,7 +1943,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 
@@ -1992,7 +2000,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact, a group and a message
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addGroup(txn, group);
@@ -2076,7 +2084,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact, a shared group and a shared message
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addGroup(txn, group);
@@ -2121,7 +2129,7 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		Connection txn = db.startTransaction();
 
 		// Add a contact, a shared group and a shared message
-		db.addLocalAuthor(txn, localAuthor);
+		db.addIdentity(txn, identity);
 		assertEquals(contactId,
 				db.addContact(txn, author, localAuthor.getId(), true));
 		db.addGroup(txn, group);
@@ -2237,6 +2245,30 @@ public abstract class JdbcDatabaseTest extends BrambleTestCase {
 		db.close();
 	}
 
+	@Test
+	public void testSetHandshakeKeyPair() throws Exception {
+		Identity withoutKeys =
+				new Identity(localAuthor, null, null, identity.getTimeCreated());
+		assertFalse(withoutKeys.hasHandshakeKeyPair());
+		byte[] publicKey = getRandomBytes(MAX_AGREEMENT_PUBLIC_KEY_BYTES);
+		byte[] privateKey = getRandomBytes(123);
+
+		Database<Connection> db = open(false);
+		Connection txn = db.startTransaction();
+
+		db.addIdentity(txn, withoutKeys);
+		Identity retrieved = db.getIdentity(txn, localAuthor.getId());
+		assertFalse(retrieved.hasHandshakeKeyPair());
+		db.setHandshakeKeyPair(txn, localAuthor.getId(), publicKey, privateKey);
+		retrieved = db.getIdentity(txn, localAuthor.getId());
+		assertTrue(retrieved.hasHandshakeKeyPair());
+		assertArrayEquals(publicKey, retrieved.getHandshakePublicKey());
+		assertArrayEquals(privateKey, retrieved.getHandshakePrivateKey());
+
+		db.commitTransaction(txn);
+		db.close();
+	}
+
 	private Database<Connection> open(boolean resume) throws Exception {
 		return open(resume, new TestMessageFactory(), new SystemClock());
 	}

bramble-core/src/test/java/org/briarproject/bramble/identity/IdentityManagerImplTest.java

@@ -8,18 +8,17 @@ import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Transaction;
 import org.briarproject.bramble.api.identity.AuthorFactory;
-import org.briarproject.bramble.api.identity.IdentityManager;
+import org.briarproject.bramble.api.identity.Identity;
 import org.briarproject.bramble.api.identity.LocalAuthor;
+import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.test.BrambleMockTestCase;
 import org.briarproject.bramble.test.DbExpectations;
 import org.jmock.Expectations;
 import org.junit.Before;
 import org.junit.Test;
 
-import java.util.Collection;
-import java.util.Collections;
-
-import static org.briarproject.bramble.test.TestUtils.getLocalAuthor;
+import static java.util.Collections.singletonList;
+import static org.briarproject.bramble.test.TestUtils.getIdentity;
 import static org.junit.Assert.assertEquals;
 
 public class IdentityManagerImplTest extends BrambleMockTestCase {
@@ -28,67 +27,100 @@ public class IdentityManagerImplTest extends BrambleMockTestCase {
 	private final CryptoComponent crypto = context.mock(CryptoComponent.class);
 	private final AuthorFactory authorFactory =
 			context.mock(AuthorFactory.class);
-	private final PublicKey publicKey = context.mock(PublicKey.class);
-	private final PrivateKey privateKey = context.mock(PrivateKey.class);
+	private final Clock clock = context.mock(Clock.class);
+	private final PublicKey handshakePublicKey = context.mock(PublicKey.class);
+	private final PrivateKey handshakePrivateKey =
+			context.mock(PrivateKey.class);
 
 	private final Transaction txn = new Transaction(null, false);
-	private final LocalAuthor localAuthor = getLocalAuthor();
-	private final Collection<LocalAuthor> localAuthors =
-			Collections.singletonList(localAuthor);
-	private final String authorName = localAuthor.getName();
-	private final KeyPair keyPair = new KeyPair(publicKey, privateKey);
-	private final byte[] publicKeyBytes = localAuthor.getPublicKey();
-	private final byte[] privateKeyBytes = localAuthor.getPrivateKey();
-	private IdentityManager identityManager;
+	private final Identity identityWithKeys = getIdentity();
+	private final LocalAuthor localAuthor = identityWithKeys.getLocalAuthor();
+	private final Identity identityWithoutKeys = new Identity(localAuthor,
+			null, null, identityWithKeys.getTimeCreated());
+	private final KeyPair handshakeKeyPair =
+			new KeyPair(handshakePublicKey, handshakePrivateKey);
+	private final byte[] handshakePublicKeyBytes =
+			identityWithKeys.getHandshakePublicKey();
+	private final byte[] handshakePrivateKeyBytes =
+			identityWithKeys.getHandshakePrivateKey();
+
+	private IdentityManagerImpl identityManager;
 
 	@Before
 	public void setUp() {
-		identityManager = new IdentityManagerImpl(db, crypto, authorFactory);
+		identityManager =
+				new IdentityManagerImpl(db, crypto, authorFactory, clock);
 	}
 
 	@Test
-	public void testCreateLocalAuthor() {
+	public void testOpenDatabaseIdentityRegistered() throws Exception {
 		context.checking(new Expectations() {{
-			oneOf(crypto).generateSignatureKeyPair();
-			will(returnValue(keyPair));
-			oneOf(publicKey).getEncoded();
-			will(returnValue(publicKeyBytes));
-			oneOf(privateKey).getEncoded();
-			will(returnValue(privateKeyBytes));
-			oneOf(authorFactory).createLocalAuthor(authorName,
-					publicKeyBytes, privateKeyBytes);
-			will(returnValue(localAuthor));
+			oneOf(db).addIdentity(txn, identityWithKeys);
 		}});
 
-		assertEquals(localAuthor,
-				identityManager.createLocalAuthor(authorName));
+		identityManager.registerIdentity(identityWithKeys);
+		identityManager.onDatabaseOpened(txn);
 	}
 
 	@Test
-	public void testRegisterAndStoreLocalAuthor() throws Exception {
-		context.checking(new DbExpectations() {{
-			oneOf(db).transaction(with(false), withDbRunnable(txn));
-			oneOf(db).addLocalAuthor(txn, localAuthor);
+	public void testOpenDatabaseHandshakeKeysGenerated() throws Exception {
+		context.checking(new Expectations() {{
+			oneOf(db).getIdentities(txn);
+			will(returnValue(singletonList(identityWithoutKeys)));
+			oneOf(crypto).generateAgreementKeyPair();
+			will(returnValue(handshakeKeyPair));
+			oneOf(handshakePublicKey).getEncoded();
+			will(returnValue(handshakePublicKeyBytes));
+			oneOf(handshakePrivateKey).getEncoded();
+			will(returnValue(handshakePrivateKeyBytes));
+			oneOf(db).setHandshakeKeyPair(txn, localAuthor.getId(),
+					handshakePublicKeyBytes, handshakePrivateKeyBytes);
 		}});
 
-		identityManager.registerLocalAuthor(localAuthor);
+		identityManager.onDatabaseOpened(txn);
+	}
+
+	@Test
+	public void testOpenDatabaseNoHandshakeKeysGenerated() throws Exception {
+		context.checking(new Expectations() {{
+			oneOf(db).getIdentities(txn);
+			will(returnValue(singletonList(identityWithKeys)));
+		}});
+
+		identityManager.onDatabaseOpened(txn);
+	}
+
+	@Test
+	public void testGetLocalAuthorIdentityRegistered() throws DbException {
+		identityManager.registerIdentity(identityWithKeys);
 		assertEquals(localAuthor, identityManager.getLocalAuthor());
-		identityManager.storeLocalAuthor();
 	}
 
 	@Test
-	public void testGetLocalAuthor() throws Exception {
+	public void testGetLocalAuthorHandshakeKeysGenerated() throws Exception {
 		context.checking(new DbExpectations() {{
 			oneOf(db).transactionWithResult(with(true), withDbCallable(txn));
-			oneOf(db).getLocalAuthors(txn);
-			will(returnValue(localAuthors));
+			oneOf(db).getIdentities(txn);
+			will(returnValue(singletonList(identityWithoutKeys)));
+			oneOf(crypto).generateAgreementKeyPair();
+			will(returnValue(handshakeKeyPair));
+			oneOf(handshakePublicKey).getEncoded();
+			will(returnValue(handshakePublicKeyBytes));
+			oneOf(handshakePrivateKey).getEncoded();
+			will(returnValue(handshakePrivateKeyBytes));
 		}});
+
 		assertEquals(localAuthor, identityManager.getLocalAuthor());
 	}
 
 	@Test
-	public void testGetCachedLocalAuthor() throws DbException {
-		identityManager.registerLocalAuthor(localAuthor);
+	public void testGetLocalAuthorNoHandshakeKeysGenerated() throws Exception {
+		context.checking(new DbExpectations() {{
+			oneOf(db).transactionWithResult(with(true), withDbCallable(txn));
+			oneOf(db).getIdentities(txn);
+			will(returnValue(singletonList(identityWithKeys)));
+		}});
+
 		assertEquals(localAuthor, identityManager.getLocalAuthor());
 	}
 

bramble-core/src/test/java/org/briarproject/bramble/lifecycle/LifecycleManagerImplTest.java

@@ -0,0 +1,53 @@
+package org.briarproject.bramble.lifecycle;
+
+import org.briarproject.bramble.api.crypto.SecretKey;
+import org.briarproject.bramble.api.db.DatabaseComponent;
+import org.briarproject.bramble.api.db.Transaction;
+import org.briarproject.bramble.api.event.EventBus;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager.OpenDatabaseHook;
+import org.briarproject.bramble.api.lifecycle.event.LifecycleEvent;
+import org.briarproject.bramble.test.BrambleMockTestCase;
+import org.briarproject.bramble.test.DbExpectations;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import static junit.framework.TestCase.assertTrue;
+import static org.briarproject.bramble.api.lifecycle.LifecycleManager.StartResult.SUCCESS;
+import static org.briarproject.bramble.test.TestUtils.getSecretKey;
+import static org.junit.Assert.assertEquals;
+
+public class LifecycleManagerImplTest extends BrambleMockTestCase {
+
+	private final DatabaseComponent db = context.mock(DatabaseComponent.class);
+	private final EventBus eventBus = context.mock(EventBus.class);
+
+	private final SecretKey dbKey = getSecretKey();
+
+	private LifecycleManagerImpl lifecycleManager;
+
+	@Before
+	public void setUp() {
+		lifecycleManager = new LifecycleManagerImpl(db, eventBus);
+	}
+
+	@Test
+	public void testOpenDatabaseHooksAreCalledAtStartup() throws Exception {
+		Transaction txn = new Transaction(null, false);
+		AtomicBoolean called = new AtomicBoolean(false);
+		OpenDatabaseHook hook = transaction -> called.set(true);
+
+		context.checking(new DbExpectations() {{
+			oneOf(db).open(dbKey, lifecycleManager);
+			will(returnValue(false));
+			oneOf(db).transaction(with(false), withDbRunnable(txn));
+			allowing(eventBus).broadcast(with(any(LifecycleEvent.class)));
+		}});
+
+		lifecycleManager.registerOpenDatabaseHook(hook);
+
+		assertEquals(SUCCESS, lifecycleManager.startServices(dbKey));
+		assertTrue(called.get());
+	}
+}

bramble-core/src/test/java/org/briarproject/bramble/properties/TransportPropertyManagerImplTest.java

@@ -115,7 +115,7 @@ public class TransportPropertyManagerImplTest extends BrambleMockTestCase {
 				1, true, true);
 
 		TransportPropertyManagerImpl t = createInstance();
-		t.createLocalState(txn);
+		t.onDatabaseOpened(txn);
 	}
 
 	@Test
@@ -129,7 +129,7 @@ public class TransportPropertyManagerImplTest extends BrambleMockTestCase {
 		}});
 
 		TransportPropertyManagerImpl t = createInstance();
-		t.createLocalState(txn);
+		t.onDatabaseOpened(txn);
 	}
 
 	@Test

bramble-core/src/test/java/org/briarproject/bramble/test/TestLifecycleModule.java

@@ -6,7 +6,6 @@ import org.briarproject.bramble.api.lifecycle.LifecycleManager;
 import org.briarproject.bramble.api.lifecycle.Service;
 import org.briarproject.bramble.api.lifecycle.ShutdownManager;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.Client;
 
 import java.util.concurrent.Executor;
 import java.util.concurrent.ExecutorService;
@@ -32,7 +31,7 @@ public class TestLifecycleModule {
 			}
 
 			@Override
-			public void registerClient(Client c) {
+			public void registerOpenDatabaseHook(OpenDatabaseHook hook) {
 			}
 
 			@Override

bramble-core/src/test/java/org/briarproject/bramble/versioning/ClientVersioningManagerImplTest.java

@@ -83,7 +83,7 @@ public class ClientVersioningManagerImplTest extends BrambleMockTestCase {
 		expectAddingContact();
 
 		ClientVersioningManagerImpl c = createInstance();
-		c.createLocalState(txn);
+		c.onDatabaseOpened(txn);
 	}
 
 	@Test
@@ -95,7 +95,7 @@ public class ClientVersioningManagerImplTest extends BrambleMockTestCase {
 		}});
 
 		ClientVersioningManagerImpl c = createInstance();
-		c.createLocalState(txn);
+		c.onDatabaseOpened(txn);
 	}
 
 	@Test

briar-android/src/main/java/org/briarproject/briar/android/AppModule.java

@@ -226,7 +226,7 @@ public class AppModule {
 	@Singleton
 	RecentEmoji provideRecentEmoji(LifecycleManager lifecycleManager,
 			RecentEmojiImpl recentEmoji) {
-		lifecycleManager.registerClient(recentEmoji);
+		lifecycleManager.registerOpenDatabaseHook(recentEmoji);
 		return recentEmoji;
 	}
 }

briar-android/src/main/java/org/briarproject/briar/android/RecentEmojiImpl.java

@@ -8,11 +8,11 @@ import com.vanniktech.emoji.emoji.Emoji;
 import org.briarproject.bramble.api.db.DatabaseExecutor;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Transaction;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager.OpenDatabaseHook;
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.bramble.api.settings.Settings;
 import org.briarproject.bramble.api.settings.SettingsManager;
-import org.briarproject.bramble.api.sync.Client;
 import org.briarproject.bramble.api.system.AndroidExecutor;
 import org.briarproject.bramble.util.StringUtils;
 
@@ -30,7 +30,7 @@ import static org.briarproject.briar.android.settings.SettingsFragment.SETTINGS_
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
-class RecentEmojiImpl implements RecentEmoji, Client {
+class RecentEmojiImpl implements RecentEmoji, OpenDatabaseHook {
 
 	private static final Logger LOG =
 			Logger.getLogger(RecentEmojiImpl.class.getName());
@@ -72,7 +72,7 @@ class RecentEmojiImpl implements RecentEmoji, Client {
 	}
 
 	@Override
-	public void createLocalState(Transaction txn) throws DbException {
+	public void onDatabaseOpened(Transaction txn) throws DbException {
 		Settings settings =
 				settingsManager.getSettings(txn, SETTINGS_NAMESPACE);
 		String serialized = settings.get(EMOJI_LRU_PREFERENCE);

briar-api/src/main/java/org/briarproject/briar/api/blog/BlogManager.java

@@ -124,6 +124,12 @@ public interface BlogManager {
 	void registerRemoveBlogHook(RemoveBlogHook hook);
 
 	interface RemoveBlogHook {
+		/**
+		 * Called when a blog is being removed.
+		 *
+		 * @param txn A read-write transaction
+		 * @param b The blog that is being removed
+		 */
 		void removingBlog(Transaction txn, Blog b) throws DbException;
 	}
 

briar-api/src/main/java/org/briarproject/briar/api/forum/ForumManager.java

@@ -100,6 +100,12 @@ public interface ForumManager {
 	void setReadFlag(GroupId g, MessageId m, boolean read) throws DbException;
 
 	interface RemoveForumHook {
+		/**
+		 * Called when a forum is being removed.
+		 *
+		 * @param txn A read-write transaction
+		 * @param f The forum that is being removed
+		 */
 		void removingForum(Transaction txn, Forum f) throws DbException;
 	}
 }

briar-api/src/main/java/org/briarproject/briar/api/privategroup/PrivateGroupManager.java

@@ -140,9 +140,22 @@ public interface PrivateGroupManager {
 	@NotNullByDefault
 	interface PrivateGroupHook {
 
+		/**
+		 * Called when a member is being added to a private group.
+		 *
+		 * @param txn A read-write transaction
+		 * @param g The ID of the private group
+		 * @param a The member that is being added
+		 */
 		void addingMember(Transaction txn, GroupId g, Author a)
 				throws DbException;
 
+		/**
+		 * Called when a private group is being removed.
+		 *
+		 * @param txn A read-write transaction
+		 * @param g The ID of the private group that is being removed
+		 */
 		void removingGroup(Transaction txn, GroupId g) throws DbException;
 
 	}

briar-core/src/main/java/org/briarproject/briar/blog/BlogManagerImpl.java

@@ -18,8 +18,8 @@ import org.briarproject.bramble.api.identity.AuthorId;
 import org.briarproject.bramble.api.identity.AuthorInfo;
 import org.briarproject.bramble.api.identity.IdentityManager;
 import org.briarproject.bramble.api.identity.LocalAuthor;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager.OpenDatabaseHook;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.Client;
 import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.Message;
@@ -68,7 +68,7 @@ import static org.briarproject.briar.api.blog.MessageType.WRAPPED_POST;
 
 @NotNullByDefault
 class BlogManagerImpl extends BdfIncomingMessageHook implements BlogManager,
-		ContactHook, Client {
+		OpenDatabaseHook, ContactHook {
 
 	private final ContactManager contactManager;
 	private final IdentityManager identityManager;
@@ -90,7 +90,7 @@ class BlogManagerImpl extends BdfIncomingMessageHook implements BlogManager,
 	}
 
 	@Override
-	public void createLocalState(Transaction txn) throws DbException {
+	public void onDatabaseOpened(Transaction txn) throws DbException {
 		// Create our personal blog if necessary
 		LocalAuthor a = identityManager.getLocalAuthor(txn);
 		Blog b = blogFactory.createBlog(a);

briar-core/src/main/java/org/briarproject/briar/blog/BlogModule.java

@@ -36,7 +36,7 @@ public class BlogModule {
 	BlogManager provideBlogManager(BlogManagerImpl blogManager,
 			LifecycleManager lifecycleManager, ContactManager contactManager,
 			ValidationManager validationManager) {
-		lifecycleManager.registerClient(blogManager);
+		lifecycleManager.registerOpenDatabaseHook(blogManager);
 		contactManager.registerContactHook(blogManager);
 		validationManager.registerIncomingMessageHook(CLIENT_ID, MAJOR_VERSION,
 				blogManager);

briar-core/src/main/java/org/briarproject/briar/feed/FeedFactoryImpl.java

@@ -4,8 +4,6 @@ import com.rometools.rome.feed.synd.SyndFeed;
 
 import org.briarproject.bramble.api.FormatException;
 import org.briarproject.bramble.api.client.ClientHelper;
-import org.briarproject.bramble.api.crypto.CryptoComponent;
-import org.briarproject.bramble.api.crypto.KeyPair;
 import org.briarproject.bramble.api.data.BdfDictionary;
 import org.briarproject.bramble.api.data.BdfEntry;
 import org.briarproject.bramble.api.data.BdfList;
@@ -32,17 +30,14 @@ import static org.briarproject.briar.api.feed.FeedConstants.KEY_FEED_URL;
 
 class FeedFactoryImpl implements FeedFactory {
 
-	private final CryptoComponent cryptoComponent;
 	private final AuthorFactory authorFactory;
 	private final BlogFactory blogFactory;
 	private final ClientHelper clientHelper;
 	private final Clock clock;
 
 	@Inject
-	FeedFactoryImpl(CryptoComponent cryptoComponent,
-			AuthorFactory authorFactory, BlogFactory blogFactory,
+	FeedFactoryImpl(AuthorFactory authorFactory, BlogFactory blogFactory,
 			ClientHelper clientHelper, Clock clock) {
-		this.cryptoComponent = cryptoComponent;
 		this.authorFactory = authorFactory;
 		this.blogFactory = blogFactory;
 		this.clientHelper = clientHelper;
@@ -55,10 +50,7 @@ class FeedFactoryImpl implements FeedFactory {
 		if (title == null) title = "RSS";
 		else title = StringUtils.truncateUtf8(title, MAX_AUTHOR_NAME_LENGTH);
 
-		KeyPair keyPair = cryptoComponent.generateSignatureKeyPair();
-		LocalAuthor localAuthor = authorFactory.createLocalAuthor(title,
-				keyPair.getPublic().getEncoded(),
-				keyPair.getPrivate().getEncoded());
+		LocalAuthor localAuthor = authorFactory.createLocalAuthor(title);
 		Blog blog = blogFactory.createFeedBlog(localAuthor);
 		long added = clock.currentTimeMillis();
 
@@ -80,7 +72,7 @@ class FeedFactoryImpl implements FeedFactory {
 		BdfList authorList = d.getList(KEY_FEED_AUTHOR);
 		byte[] privateKey = d.getRaw(KEY_FEED_PRIVATE_KEY);
 		Author author = clientHelper.parseAndValidateAuthor(authorList);
-		LocalAuthor localAuthor = authorFactory.createLocalAuthor(
+		LocalAuthor localAuthor = new LocalAuthor(author.getId(),
 				author.getFormatVersion(), author.getName(),
 				author.getPublicKey(), privateKey);
 		Blog blog = blogFactory.createFeedBlog(localAuthor);

briar-core/src/main/java/org/briarproject/briar/feed/FeedManagerImpl.java

@@ -20,11 +20,11 @@ import org.briarproject.bramble.api.event.Event;
 import org.briarproject.bramble.api.event.EventListener;
 import org.briarproject.bramble.api.identity.LocalAuthor;
 import org.briarproject.bramble.api.lifecycle.IoExecutor;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager.OpenDatabaseHook;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.TorConstants;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.plugin.event.TransportEnabledEvent;
-import org.briarproject.bramble.api.sync.Client;
 import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.system.Clock;
@@ -32,6 +32,7 @@ import org.briarproject.bramble.api.system.Scheduler;
 import org.briarproject.bramble.util.StringUtils;
 import org.briarproject.briar.api.blog.Blog;
 import org.briarproject.briar.api.blog.BlogManager;
+import org.briarproject.briar.api.blog.BlogManager.RemoveBlogHook;
 import org.briarproject.briar.api.blog.BlogPost;
 import org.briarproject.briar.api.blog.BlogPostFactory;
 import org.briarproject.briar.api.feed.Feed;
@@ -75,8 +76,8 @@ import static org.briarproject.briar.util.HtmlUtils.clean;
 
 @ThreadSafe
 @NotNullByDefault
-class FeedManagerImpl implements FeedManager, Client, EventListener,
-		BlogManager.RemoveBlogHook {
+class FeedManagerImpl implements FeedManager, EventListener, OpenDatabaseHook,
+		RemoveBlogHook {
 
 	private static final Logger LOG =
 			Logger.getLogger(FeedManagerImpl.class.getName());
@@ -136,7 +137,7 @@ class FeedManagerImpl implements FeedManager, Client, EventListener,
 	}
 
 	@Override
-	public void createLocalState(Transaction txn) throws DbException {
+	public void onDatabaseOpened(Transaction txn) throws DbException {
 		Group g = getLocalGroup();
 		// Return if we've already set the local group up
 		if (db.containsGroup(txn, g.getId())) return;

briar-core/src/main/java/org/briarproject/briar/feed/FeedModule.java

@@ -24,8 +24,7 @@ public class FeedModule {
 	FeedManager provideFeedManager(FeedManagerImpl feedManager,
 			LifecycleManager lifecycleManager, EventBus eventBus,
 			BlogManager blogManager) {
-
-		lifecycleManager.registerClient(feedManager);
+		lifecycleManager.registerOpenDatabaseHook(feedManager);
 		eventBus.addListener(feedManager);
 		blogManager.registerRemoveBlogHook(feedManager);
 		return feedManager;

briar-core/src/main/java/org/briarproject/briar/introduction/IntroductionManagerImpl.java

@@ -19,8 +19,8 @@ import org.briarproject.bramble.api.identity.AuthorId;
 import org.briarproject.bramble.api.identity.AuthorInfo;
 import org.briarproject.bramble.api.identity.IdentityManager;
 import org.briarproject.bramble.api.identity.LocalAuthor;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager.OpenDatabaseHook;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.Client;
 import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.Group.Visibility;
 import org.briarproject.bramble.api.sync.GroupId;
@@ -67,7 +67,7 @@ import static org.briarproject.briar.introduction.MessageType.REQUEST;
 @Immutable
 @NotNullByDefault
 class IntroductionManagerImpl extends ConversationClientImpl
-		implements IntroductionManager, Client, ContactHook,
+		implements IntroductionManager, OpenDatabaseHook, ContactHook,
 		ClientVersioningHook {
 
 	private final ClientVersioningManager clientVersioningManager;
@@ -115,7 +115,7 @@ class IntroductionManagerImpl extends ConversationClientImpl
 	}
 
 	@Override
-	public void createLocalState(Transaction txn) throws DbException {
+	public void onDatabaseOpened(Transaction txn) throws DbException {
 		// Create a local group to store protocol sessions
 		if (db.containsGroup(txn, localGroup.getId())) return;
 		db.addGroup(txn, localGroup);

briar-core/src/main/java/org/briarproject/briar/introduction/IntroductionModule.java

@@ -51,7 +51,7 @@ public class IntroductionModule {
 			ConversationManager conversationManager,
 			ClientVersioningManager clientVersioningManager,
 			IntroductionManagerImpl introductionManager) {
-		lifecycleManager.registerClient(introductionManager);
+		lifecycleManager.registerOpenDatabaseHook(introductionManager);
 		contactManager.registerContactHook(introductionManager);
 		validationManager.registerIncomingMessageHook(CLIENT_ID,
 				MAJOR_VERSION, introductionManager);

briar-core/src/main/java/org/briarproject/briar/messaging/MessagingManagerImpl.java

@@ -12,8 +12,8 @@ import org.briarproject.bramble.api.data.MetadataParser;
 import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Transaction;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager.OpenDatabaseHook;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.Client;
 import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.Group.Visibility;
 import org.briarproject.bramble.api.sync.GroupId;
@@ -50,7 +50,8 @@ import static org.briarproject.briar.client.MessageTrackerConstants.MSG_KEY_READ
 @Immutable
 @NotNullByDefault
 class MessagingManagerImpl extends ConversationClientImpl
-		implements MessagingManager, Client, ContactHook, ClientVersioningHook {
+		implements MessagingManager, OpenDatabaseHook, ContactHook,
+		ClientVersioningHook {
 
 	private final ClientVersioningManager clientVersioningManager;
 	private final ContactGroupFactory contactGroupFactory;
@@ -66,7 +67,7 @@ class MessagingManagerImpl extends ConversationClientImpl
 	}
 
 	@Override
-	public void createLocalState(Transaction txn) throws DbException {
+	public void onDatabaseOpened(Transaction txn) throws DbException {
 		// Create a local group to indicate that we've set this client up
 		Group localGroup = contactGroupFactory.createLocalGroup(CLIENT_ID,
 				MAJOR_VERSION);

briar-core/src/main/java/org/briarproject/briar/messaging/MessagingModule.java

@@ -58,7 +58,7 @@ public class MessagingModule {
 			ConversationManager conversationManager,
 			ClientVersioningManager clientVersioningManager,
 			MessagingManagerImpl messagingManager) {
-		lifecycleManager.registerClient(messagingManager);
+		lifecycleManager.registerOpenDatabaseHook(messagingManager);
 		contactManager.registerContactHook(messagingManager);
 		validationManager.registerIncomingMessageHook(CLIENT_ID, MAJOR_VERSION,
 				messagingManager);

briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/GroupInvitationManagerImpl.java

@@ -14,8 +14,8 @@ import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.db.Transaction;
 import org.briarproject.bramble.api.identity.Author;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager.OpenDatabaseHook;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.Client;
 import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.Group.Visibility;
 import org.briarproject.bramble.api.sync.GroupId;
@@ -62,7 +62,7 @@ import static org.briarproject.briar.privategroup.invitation.Role.PEER;
 @Immutable
 @NotNullByDefault
 class GroupInvitationManagerImpl extends ConversationClientImpl
-		implements GroupInvitationManager, Client, ContactHook,
+		implements GroupInvitationManager, OpenDatabaseHook, ContactHook,
 		PrivateGroupHook, ClientVersioningHook {
 
 	private final ClientVersioningManager clientVersioningManager;
@@ -101,7 +101,7 @@ class GroupInvitationManagerImpl extends ConversationClientImpl
 	}
 
 	@Override
-	public void createLocalState(Transaction txn) throws DbException {
+	public void onDatabaseOpened(Transaction txn) throws DbException {
 		// Create a local group to indicate that we've set this client up
 		Group localGroup = contactGroupFactory.createLocalGroup(CLIENT_ID,
 				MAJOR_VERSION);

briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/GroupInvitationModule.java

@@ -42,7 +42,7 @@ public class GroupInvitationModule {
 			PrivateGroupManager privateGroupManager,
 			ConversationManager conversationManager,
 			ClientVersioningManager clientVersioningManager) {
-		lifecycleManager.registerClient(groupInvitationManager);
+		lifecycleManager.registerOpenDatabaseHook(groupInvitationManager);
 		validationManager.registerIncomingMessageHook(CLIENT_ID, MAJOR_VERSION,
 				groupInvitationManager);
 		contactManager.registerContactHook(groupInvitationManager);

briar-core/src/main/java/org/briarproject/briar/sharing/SharingManagerImpl.java

@@ -13,8 +13,8 @@ import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.db.Metadata;
 import org.briarproject.bramble.api.db.Transaction;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager.OpenDatabaseHook;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.Client;
 import org.briarproject.bramble.api.sync.ClientId;
 import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.api.sync.Group.Visibility;
@@ -55,7 +55,7 @@ import static org.briarproject.briar.sharing.State.SHARING;
 @NotNullByDefault
 abstract class SharingManagerImpl<S extends Shareable>
 		extends ConversationClientImpl
-		implements SharingManager<S>, Client, ContactHook,
+		implements SharingManager<S>, OpenDatabaseHook, ContactHook,
 		ClientVersioningHook {
 
 	private final ClientVersioningManager clientVersioningManager;
@@ -92,7 +92,7 @@ abstract class SharingManagerImpl<S extends Shareable>
 	protected abstract int getShareableMajorVersion();
 
 	@Override
-	public void createLocalState(Transaction txn) throws DbException {
+	public void onDatabaseOpened(Transaction txn) throws DbException {
 		// Create a local group to indicate that we've set this client up
 		Group localGroup = contactGroupFactory.createLocalGroup(getClientId(),
 				getMajorVersion());

briar-core/src/main/java/org/briarproject/briar/sharing/SharingModule.java

@@ -76,7 +76,7 @@ public class SharingModule {
 			ConversationManager conversationManager, BlogManager blogManager,
 			ClientVersioningManager clientVersioningManager,
 			BlogSharingManagerImpl blogSharingManager) {
-		lifecycleManager.registerClient(blogSharingManager);
+		lifecycleManager.registerOpenDatabaseHook(blogSharingManager);
 		contactManager.registerContactHook(blogSharingManager);
 		validationManager.registerIncomingMessageHook(
 				BlogSharingManager.CLIENT_ID, BlogSharingManager.MAJOR_VERSION,
@@ -135,7 +135,7 @@ public class SharingModule {
 			ConversationManager conversationManager, ForumManager forumManager,
 			ClientVersioningManager clientVersioningManager,
 			ForumSharingManagerImpl forumSharingManager) {
-		lifecycleManager.registerClient(forumSharingManager);
+		lifecycleManager.registerOpenDatabaseHook(forumSharingManager);
 		contactManager.registerContactHook(forumSharingManager);
 		validationManager.registerIncomingMessageHook(
 				ForumSharingManager.CLIENT_ID,

briar-core/src/main/java/org/briarproject/briar/test/TestDataCreatorImpl.java

@@ -5,8 +5,6 @@ import org.briarproject.bramble.api.client.ClientHelper;
 import org.briarproject.bramble.api.contact.Contact;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.contact.ContactManager;
-import org.briarproject.bramble.api.crypto.CryptoComponent;
-import org.briarproject.bramble.api.crypto.KeyPair;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.data.BdfDictionary;
 import org.briarproject.bramble.api.db.DatabaseComponent;
@@ -74,7 +72,6 @@ public class TestDataCreatorImpl implements TestDataCreator {
 	private final ClientHelper clientHelper;
 	private final MessageTracker messageTracker;
 	private final BlogPostFactory blogPostFactory;
-	private final CryptoComponent cryptoComponent;
 
 	private final DatabaseComponent db;
 	private final IdentityManager identityManager;
@@ -94,9 +91,8 @@ public class TestDataCreatorImpl implements TestDataCreator {
 	TestDataCreatorImpl(AuthorFactory authorFactory, Clock clock,
 			PrivateMessageFactory privateMessageFactory,
 			ClientHelper clientHelper, MessageTracker messageTracker,
-			BlogPostFactory blogPostFactory, CryptoComponent cryptoComponent,
-			DatabaseComponent db, IdentityManager identityManager,
-			ContactManager contactManager,
+			BlogPostFactory blogPostFactory, DatabaseComponent db,
+			IdentityManager identityManager, ContactManager contactManager,
 			TransportPropertyManager transportPropertyManager,
 			MessagingManager messagingManager, BlogManager blogManager,
 			ForumManager forumManager, @IoExecutor Executor ioExecutor) {
@@ -106,7 +102,6 @@ public class TestDataCreatorImpl implements TestDataCreator {
 		this.clientHelper = clientHelper;
 		this.messageTracker = messageTracker;
 		this.blogPostFactory = blogPostFactory;
-		this.cryptoComponent = cryptoComponent;
 		this.db = db;
 		this.identityManager = identityManager;
 		this.contactManager = contactManager;
@@ -150,14 +145,14 @@ public class TestDataCreatorImpl implements TestDataCreator {
 		List<Contact> contacts = new ArrayList<>(numContacts);
 		LocalAuthor localAuthor = identityManager.getLocalAuthor();
 		for (int i = 0; i < numContacts; i++) {
-			LocalAuthor author = getRandomAuthor();
-			Contact contact = addContact(localAuthor.getId(), author);
+			LocalAuthor remote = getRandomAuthor();
+			Contact contact = addContact(localAuthor.getId(), remote);
 			contacts.add(contact);
 		}
 		return contacts;
 	}
 
-	private Contact addContact(AuthorId localAuthorId, LocalAuthor author)
+	private Contact addContact(AuthorId localAuthorId, LocalAuthor remote)
 			throws DbException {
 
 		// prepare to add contact
@@ -173,7 +168,7 @@ public class TestDataCreatorImpl implements TestDataCreator {
 		Transaction txn = db.startTransaction(false);
 		try {
 			ContactId contactId = contactManager
-					.addContact(txn, author, localAuthorId, secretKey,
+					.addContact(txn, remote, localAuthorId, secretKey,
 							timestamp, true, verified, true);
 			if (random.nextBoolean()) {
 				contactManager
@@ -187,24 +182,18 @@ public class TestDataCreatorImpl implements TestDataCreator {
 		}
 
 		if (LOG.isLoggable(INFO)) {
-			LOG.info("Added contact " + author.getName());
+			LOG.info("Added contact " + remote.getName());
 			LOG.info("with transport properties: " + props.toString());
 		}
-		localAuthors.put(contact, author);
+		localAuthors.put(contact, remote);
 		return contact;
 	}
 
 	@Override
 	public Contact addContact(String name) throws DbException {
 		LocalAuthor localAuthor = identityManager.getLocalAuthor();
-		return addContact(localAuthor.getId(), getAuthor(name));
-	}
-
-	private LocalAuthor getAuthor(String name) {
-		KeyPair keyPair = cryptoComponent.generateSignatureKeyPair();
-		byte[] publicKey = keyPair.getPublic().getEncoded();
-		byte[] privateKey = keyPair.getPrivate().getEncoded();
-		return authorFactory.createLocalAuthor(name, publicKey, privateKey);
+		LocalAuthor remote = authorFactory.createLocalAuthor(name);
+		return addContact(localAuthor.getId(), remote);
 	}
 
 	private String getRandomAuthorName() {
@@ -213,7 +202,7 @@ public class TestDataCreatorImpl implements TestDataCreator {
 	}
 
 	private LocalAuthor getRandomAuthor() {
-		return getAuthor(getRandomAuthorName());
+		return authorFactory.createLocalAuthor(getRandomAuthorName());
 	}
 
 	private SecretKey getSecretKey() {

briar-core/src/test/java/org/briarproject/briar/blog/BlogManagerImplTest.java

@@ -112,7 +112,7 @@ public class BlogManagerImplTest extends BriarTestCase {
 	}
 
 	@Test
-	public void testCreateLocalState() throws DbException {
+	public void testOpenDatabaseHook() throws DbException {
 		Transaction txn = new Transaction(null, false);
 
 		context.checking(new Expectations() {{
@@ -123,7 +123,7 @@ public class BlogManagerImplTest extends BriarTestCase {
 			oneOf(db).addGroup(txn, blog1.getGroup());
 		}});
 
-		blogManager.createLocalState(txn);
+		blogManager.onDatabaseOpened(txn);
 		context.assertIsSatisfied();
 	}
 

briar-core/src/test/java/org/briarproject/briar/blog/BlogManagerIntegrationTest.java

@@ -21,9 +21,7 @@ import java.util.Iterator;
 
 import static junit.framework.Assert.assertNotNull;
 import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_AUTHOR_NAME_LENGTH;
-import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_PUBLIC_KEY_LENGTH;
 import static org.briarproject.bramble.api.identity.AuthorInfo.Status.NONE;
-import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
 import static org.briarproject.bramble.util.StringUtils.getRandomString;
 import static org.briarproject.briar.api.blog.MessageType.COMMENT;
 import static org.briarproject.briar.api.blog.MessageType.POST;
@@ -50,10 +48,8 @@ public class BlogManagerIntegrationTest
 
 		author0 = identityManager0.getLocalAuthor();
 		author1 = identityManager1.getLocalAuthor();
-		rssAuthor = c0.getAuthorFactory().createLocalAuthor(
-				getRandomString(MAX_AUTHOR_NAME_LENGTH),
-				getRandomBytes(MAX_PUBLIC_KEY_LENGTH),
-				getRandomBytes(123));
+		String rssTitle = getRandomString(MAX_AUTHOR_NAME_LENGTH);
+		rssAuthor = c0.getAuthorFactory().createLocalAuthor(rssTitle);
 
 		blogManager0 = c0.getBlogManager();
 		blogManager1 = c1.getBlogManager();

briar-core/src/test/java/org/briarproject/briar/feed/FeedManagerIntegrationTest.java

@@ -1,7 +1,7 @@
 package org.briarproject.briar.feed;
 
+import org.briarproject.bramble.api.identity.Identity;
 import org.briarproject.bramble.api.identity.IdentityManager;
-import org.briarproject.bramble.api.identity.LocalAuthor;
 import org.briarproject.bramble.api.lifecycle.LifecycleManager;
 import org.briarproject.bramble.contact.ContactModule;
 import org.briarproject.bramble.crypto.CryptoExecutorModule;
@@ -51,8 +51,8 @@ public class FeedManagerIntegrationTest extends BriarTestCase {
 		injectEagerSingletons(component);
 
 		IdentityManager identityManager = component.getIdentityManager();
-		LocalAuthor localAuthor = identityManager.createLocalAuthor("feedTest");
-		identityManager.registerLocalAuthor(localAuthor);
+		Identity identity = identityManager.createIdentity("feedTest");
+		identityManager.registerIdentity(identity);
 
 		lifecycleManager = component.getLifecycleManager();
 		lifecycleManager.startServices(getSecretKey());

briar-core/src/test/java/org/briarproject/briar/introduction/IntroductionCryptoIntegrationTest.java

@@ -58,10 +58,8 @@ public class IntroductionCryptoIntegrationTest extends BrambleTestCase {
 		crypto = new IntroductionCryptoImpl(cryptoComponent, clientHelper);
 
 		introducer = getRealAuthor(authorFactory);
-		LocalAuthor introducee1 =
-				getRealLocalAuthor(cryptoComponent, authorFactory);
-		LocalAuthor introducee2 =
-				getRealLocalAuthor(cryptoComponent, authorFactory);
+		LocalAuthor introducee1 = getRealLocalAuthor(authorFactory);
+		LocalAuthor introducee2 = getRealLocalAuthor(authorFactory);
 		boolean isAlice =
 				crypto.isAlice(introducee1.getId(), introducee2.getId());
 		alice = isAlice ? introducee1 : introducee2;

briar-core/src/test/java/org/briarproject/briar/messaging/MessageSizeIntegrationTest.java

@@ -2,7 +2,6 @@ package org.briarproject.briar.messaging;
 
 import org.briarproject.bramble.api.UniqueId;
 import org.briarproject.bramble.api.crypto.CryptoComponent;
-import org.briarproject.bramble.api.crypto.PrivateKey;
 import org.briarproject.bramble.api.identity.AuthorFactory;
 import org.briarproject.bramble.api.identity.LocalAuthor;
 import org.briarproject.bramble.api.sync.GroupId;
@@ -70,12 +69,8 @@ public class MessageSizeIntegrationTest extends BriarTestCase {
 	@Test
 	public void testForumPostFitsIntoRecord() throws Exception {
 		// Create a maximum-length author
-		int formatVersion = Integer.MAX_VALUE;
 		String authorName = getRandomString(MAX_AUTHOR_NAME_LENGTH);
-		byte[] authorPublic = new byte[MAX_PUBLIC_KEY_LENGTH];
-		PrivateKey privateKey = crypto.generateSignatureKeyPair().getPrivate();
-		LocalAuthor author = authorFactory.createLocalAuthor(formatVersion,
-				authorName, authorPublic, privateKey.getEncoded());
+		LocalAuthor author = authorFactory.createLocalAuthor(authorName);
 		// Create a maximum-length forum post
 		GroupId groupId = new GroupId(getRandomId());
 		long timestamp = Long.MAX_VALUE;

briar-core/src/test/java/org/briarproject/briar/messaging/SimplexMessagingIntegrationTest.java

@@ -6,8 +6,8 @@ import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.event.Event;
 import org.briarproject.bramble.api.event.EventListener;
 import org.briarproject.bramble.api.identity.Author;
+import org.briarproject.bramble.api.identity.Identity;
 import org.briarproject.bramble.api.identity.IdentityManager;
-import org.briarproject.bramble.api.identity.LocalAuthor;
 import org.briarproject.bramble.api.lifecycle.LifecycleManager;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
@@ -75,13 +75,14 @@ public class SimplexMessagingIntegrationTest extends BriarTestCase {
 	@Test
 	public void testWriteAndRead() throws Exception {
 		// Create the identities
-		LocalAuthor aliceAuthor =
-				alice.getIdentityManager().createLocalAuthor("Alice");
-		LocalAuthor bobAuthor =
-				bob.getIdentityManager().createLocalAuthor("Bob");
+		Identity aliceIdentity =
+				alice.getIdentityManager().createIdentity("Alice");
+		Identity bobIdentity = bob.getIdentityManager().createIdentity("Bob");
 		// Set up the devices and get the contact IDs
-		ContactId bobId = setUp(alice, aliceAuthor, bobAuthor, true);
-		ContactId aliceId = setUp(bob, bobAuthor, aliceAuthor, false);
+		ContactId bobId = setUp(alice, aliceIdentity,
+				bobIdentity.getLocalAuthor(), true);
+		ContactId aliceId = setUp(bob, bobIdentity,
+				aliceIdentity.getLocalAuthor(), false);
 		// Add a private message listener
 		PrivateMessageListener listener = new PrivateMessageListener();
 		bob.getEventBus().addListener(listener);
@@ -100,10 +101,10 @@ public class SimplexMessagingIntegrationTest extends BriarTestCase {
 	}
 
 	private ContactId setUp(SimplexMessagingIntegrationTestComponent device,
-			LocalAuthor local, Author remote, boolean alice) throws Exception {
+			Identity local, Author remote, boolean alice) throws Exception {
 		// Add an identity for the user
 		IdentityManager identityManager = device.getIdentityManager();
-		identityManager.registerLocalAuthor(local);
+		identityManager.registerIdentity(local);
 		// Start the lifecycle manager
 		LifecycleManager lifecycleManager = device.getLifecycleManager();
 		lifecycleManager.startServices(getSecretKey());

briar-core/src/test/java/org/briarproject/briar/privategroup/invitation/GroupInvitationManagerImplTest.java

@@ -149,7 +149,7 @@ public class GroupInvitationManagerImplTest extends BrambleMockTestCase {
 	}
 
 	@Test
-	public void testCreateLocalStateFirstTime() throws Exception {
+	public void testDatabaseOpenHookFirstTime() throws Exception {
 		context.checking(new Expectations() {{
 			oneOf(contactGroupFactory).createLocalGroup(CLIENT_ID,
 					MAJOR_VERSION);
@@ -161,11 +161,11 @@ public class GroupInvitationManagerImplTest extends BrambleMockTestCase {
 			will(returnValue(Collections.singletonList(contact)));
 		}});
 		expectAddingContact(contact);
-		groupInvitationManager.createLocalState(txn);
+		groupInvitationManager.onDatabaseOpened(txn);
 	}
 
 	@Test
-	public void testCreateLocalStateSubsequentTime() throws Exception {
+	public void testOpenDatabaseHookSubsequentTime() throws Exception {
 		context.checking(new Expectations() {{
 			oneOf(contactGroupFactory).createLocalGroup(CLIENT_ID,
 					MAJOR_VERSION);
@@ -173,7 +173,7 @@ public class GroupInvitationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).containsGroup(txn, localGroup.getId());
 			will(returnValue(true));
 		}});
-		groupInvitationManager.createLocalState(txn);
+		groupInvitationManager.onDatabaseOpened(txn);
 	}
 
 	private void expectAddingContact(Contact c) throws Exception {

briar-core/src/test/java/org/briarproject/briar/sharing/BlogSharingManagerImplTest.java

@@ -94,7 +94,7 @@ public class BlogSharingManagerImplTest extends BrambleMockTestCase {
 	}
 
 	@Test
-	public void testCreateLocalStateFirstTimeWithExistingContact()
+	public void testOpenDatabaseHookFirstTimeWithExistingContact()
 			throws Exception {
 		Transaction txn = new Transaction(null, false);
 
@@ -113,7 +113,7 @@ public class BlogSharingManagerImplTest extends BrambleMockTestCase {
 		// Set things up for the contact
 		expectAddingContact(txn);
 
-		blogSharingManager.createLocalState(txn);
+		blogSharingManager.onDatabaseOpened(txn);
 	}
 
 	private void expectAddingContact(Transaction txn) throws Exception {
@@ -149,7 +149,7 @@ public class BlogSharingManagerImplTest extends BrambleMockTestCase {
 	}
 
 	@Test
-	public void testCreateLocalStateSubsequentTime() throws Exception {
+	public void testOpenDatabaseHookSubsequentTime() throws Exception {
 		Transaction txn = new Transaction(null, false);
 
 		context.checking(new Expectations() {{
@@ -161,7 +161,7 @@ public class BlogSharingManagerImplTest extends BrambleMockTestCase {
 			will(returnValue(true));
 		}});
 
-		blogSharingManager.createLocalState(txn);
+		blogSharingManager.onDatabaseOpened(txn);
 	}
 
 	@Test

briar-core/src/test/java/org/briarproject/briar/test/BriarIntegrationTest.java

@@ -15,6 +15,7 @@ import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.event.Event;
 import org.briarproject.bramble.api.event.EventListener;
+import org.briarproject.bramble.api.identity.Identity;
 import org.briarproject.bramble.api.identity.IdentityManager;
 import org.briarproject.bramble.api.identity.LocalAuthor;
 import org.briarproject.bramble.api.lifecycle.LifecycleManager;
@@ -274,12 +275,15 @@ public abstract class BriarIntegrationTest<C extends BriarIntegrationTestCompone
 	}
 
 	private void createAndRegisterIdentities() {
-		author0 = identityManager0.createLocalAuthor(AUTHOR0);
-		identityManager0.registerLocalAuthor(author0);
-		author1 = identityManager1.createLocalAuthor(AUTHOR1);
-		identityManager1.registerLocalAuthor(author1);
-		author2 = identityManager2.createLocalAuthor(AUTHOR2);
-		identityManager2.registerLocalAuthor(author2);
+		Identity identity0 = identityManager0.createIdentity(AUTHOR0);
+		identityManager0.registerIdentity(identity0);
+		author0 = identity0.getLocalAuthor();
+		Identity identity1 = identityManager0.createIdentity(AUTHOR1);
+		identityManager1.registerIdentity(identity1);
+		author1 = identity1.getLocalAuthor();
+		Identity identity2 = identityManager0.createIdentity(AUTHOR2);
+		identityManager2.registerIdentity(identity2);
+		author2 = identity2.getLocalAuthor();
 	}
 
 	protected void addDefaultContacts() throws Exception {

briar-core/src/test/java/org/briarproject/briar/test/BriarTestUtils.java

@@ -1,7 +1,5 @@
 package org.briarproject.briar.test;
 
-import org.briarproject.bramble.api.crypto.CryptoComponent;
-import org.briarproject.bramble.api.crypto.KeyPair;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.identity.AuthorFactory;
@@ -10,8 +8,7 @@ import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.briar.api.client.MessageTracker;
 import org.briarproject.briar.api.client.MessageTracker.GroupCount;
 
-import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_PUBLIC_KEY_LENGTH;
-import static org.briarproject.bramble.test.TestUtils.getRandomBytes;
+import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_AUTHOR_NAME_LENGTH;
 import static org.briarproject.bramble.util.StringUtils.getRandomString;
 import static org.junit.Assert.assertEquals;
 
@@ -27,23 +24,20 @@ public class BriarTestUtils {
 	}
 
 	public static void assertGroupCount(MessageTracker tracker, GroupId g,
-			long msgCount, long unreadCount) throws	DbException {
+			long msgCount, long unreadCount) throws DbException {
 		GroupCount c1 = tracker.getGroupCount(g);
 		assertEquals(msgCount, c1.getMsgCount());
 		assertEquals(unreadCount, c1.getUnreadCount());
 	}
 
 	public static Author getRealAuthor(AuthorFactory authorFactory) {
-		return authorFactory.createAuthor(getRandomString(5),
-				getRandomBytes(MAX_PUBLIC_KEY_LENGTH));
+		String name = getRandomString(MAX_AUTHOR_NAME_LENGTH);
+		return authorFactory.createLocalAuthor(name);
 	}
 
-	public static LocalAuthor getRealLocalAuthor(
-			CryptoComponent cryptoComponent, AuthorFactory authorFactory) {
-		KeyPair keyPair = cryptoComponent.generateSignatureKeyPair();
-		return authorFactory.createLocalAuthor(getRandomString(5),
-				keyPair.getPublic().getEncoded(),
-				keyPair.getPrivate().getEncoded());
+	public static LocalAuthor getRealLocalAuthor(AuthorFactory authorFactory) {
+		String name = getRandomString(MAX_AUTHOR_NAME_LENGTH);
+		return authorFactory.createLocalAuthor(name);
 	}
 
 }