modify XmppConnection to change status to online for unbound cons

schemas/im.conversations.android.database.ConversationsDatabase/1.json

@@ -2,11 +2,11 @@
   "formatVersion": 1,
   "database": {
     "version": 1,
-    "identityHash": "219a451e9a1889222b7549c8b3c0a5b3",
+    "identityHash": "1952101c2c0d439fcd6c9d417f126a54",
     "entities": [
       {
         "tableName": "account",
-        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT, `address` TEXT NOT NULL, `resource` TEXT, `randomSeed` BLOB, `enabled` INTEGER NOT NULL, `quickStartAvailable` INTEGER NOT NULL, `pendingRegistration` INTEGER NOT NULL, `loggedInSuccessfully` INTEGER NOT NULL, `showErrorNotification` INTEGER NOT NULL, `rosterVersion` TEXT, `hostname` TEXT, `port` INTEGER, `directTls` INTEGER, `proxytype` TEXT, `proxyhostname` TEXT, `proxyport` INTEGER)",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT, `address` TEXT NOT NULL, `resource` TEXT, `randomSeed` BLOB, `enabled` INTEGER NOT NULL, `quickStartAvailable` INTEGER NOT NULL, `loginAndBind` INTEGER NOT NULL, `showErrorNotification` INTEGER NOT NULL, `rosterVersion` TEXT, `hostname` TEXT, `port` INTEGER, `directTls` INTEGER, `proxytype` TEXT, `proxyhostname` TEXT, `proxyport` INTEGER)",
         "fields": [
           {
             "fieldPath": "id",
@@ -45,14 +45,8 @@
             "notNull": true
           },
           {
-            "fieldPath": "pendingRegistration",
+            "fieldPath": "loginAndBind",
-            "columnName": "pendingRegistration",
+            "columnName": "loginAndBind",
-            "affinity": "INTEGER",
-            "notNull": true
-          },
-          {
-            "fieldPath": "loggedInSuccessfully",
-            "columnName": "loggedInSuccessfully",
             "affinity": "INTEGER",
             "notNull": true
           },
@@ -2266,7 +2260,7 @@
     "views": [],
     "setupQueries": [
       "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
-      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '219a451e9a1889222b7549c8b3c0a5b3')"
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '1952101c2c0d439fcd6c9d417f126a54')"
     ]
   }
 }

src/main/java/eu/siacs/conversations/xml/Namespace.java

@@ -16,6 +16,7 @@ public final class Namespace {
     public static final String BOOKMARKS2_COMPAT = BOOKMARKS2 + "#compat";
     public static final String BOOKMARKS_CONVERSION = "urn:xmpp:bookmarks-conversion:0";
     public static final String BYTE_STREAMS = "http://jabber.org/protocol/bytestreams";
+    public static final String CAPTCHA = "urn:xmpp:captcha";
     public static final String CARBONS = "urn:xmpp:carbons:2";
     public static final String CHANNEL_BINDING = "urn:xmpp:sasl-cb:0";
     public static final String CHAT_MARKERS = "urn:xmpp:chat-markers:0";

src/main/java/im/conversations/android/database/dao/AccountDao.java

@@ -2,6 +2,7 @@ package im.conversations.android.database.dao;
 
 import androidx.room.Dao;
 import androidx.room.Insert;
+import androidx.room.OnConflictStrategy;
 import androidx.room.Query;
 import com.google.common.util.concurrent.ListenableFuture;
 import eu.siacs.conversations.xmpp.Jid;
@@ -13,7 +14,7 @@ import java.util.List;
 @Dao
 public interface AccountDao {
 
-    @Insert
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
     long insert(final AccountEntity account);
 
     @Query("SELECT id,address,randomSeed FROM account WHERE enabled = 1")
@@ -37,11 +38,8 @@ public interface AccountDao {
     @Query("SELECT quickStartAvailable FROM account where id=:id")
     boolean quickStartAvailable(long id);
 
-    @Query("SELECT pendingRegistration FROM account where id=:id")
+    @Query("SELECT loginAndBind FROM account where id=:id")
-    boolean pendingRegistration(long id);
+    boolean loginAndBind(long id);
-
-    @Query("SELECT loggedInSuccessfully == 0 FROM account where id=:id")
-    boolean isInitialLogin(long id);
 
     @Query(
             "UPDATE account set quickStartAvailable=:available WHERE id=:id AND"
@@ -49,14 +47,9 @@ public interface AccountDao {
     void setQuickStartAvailable(long id, boolean available);
 
     @Query(
-            "UPDATE account set pendingRegistration=:pendingRegistration WHERE id=:id AND"
+            "UPDATE account set loginAndBind=:loginAndBind WHERE id=:id AND"
-                    + " pendingRegistration != :pendingRegistration")
+                    + " loginAndBind != :loginAndBind")
-    void setPendingRegistration(long id, boolean pendingRegistration);
+    void setLoginAndBind(long id, boolean loginAndBind);
-
-    @Query(
-            "UPDATE account set loggedInSuccessfully=:loggedInSuccessfully WHERE id=:id AND"
-                    + " loggedInSuccessfully != :loggedInSuccessfully")
-    int setLoggedInSuccessfully(long id, boolean loggedInSuccessfully);
 
     @Query(
             "UPDATE account set showErrorNotification=:showErrorNotification WHERE id=:id AND"

src/main/java/im/conversations/android/database/entity/AccountEntity.java

@@ -28,11 +28,7 @@ public class AccountEntity {
     public boolean enabled;
 
     public boolean quickStartAvailable = false;
-    public boolean pendingRegistration = false;
+    public boolean loginAndBind = true;
-
-    // TODO this is only used during setup; depending on how the setup procedure will look in the
-    // future we might get rid of this property
-    public boolean loggedInSuccessfully = false;
 
     public boolean showErrorNotification = true;
 

src/main/java/im/conversations/android/repository/AccountRepository.java

@@ -5,12 +5,15 @@ import androidx.annotation.NonNull;
 import com.google.common.base.Preconditions;
 import com.google.common.util.concurrent.Futures;
 import com.google.common.util.concurrent.ListenableFuture;
+import com.google.common.util.concurrent.MoreExecutors;
 import eu.siacs.conversations.xmpp.Jid;
 import im.conversations.android.IDs;
 import im.conversations.android.database.CredentialStore;
 import im.conversations.android.database.entity.AccountEntity;
 import im.conversations.android.database.model.Account;
 import im.conversations.android.xmpp.ConnectionPool;
+import im.conversations.android.xmpp.XmppConnection;
+import im.conversations.android.xmpp.manager.RegistrationManager;
 
 public class AccountRepository extends AbstractRepository {
 
@@ -18,7 +21,8 @@ public class AccountRepository extends AbstractRepository {
         super(context);
     }
 
-    private Account createAccount(@NonNull final Jid address, final String password) {
+    private Account createAccount(
+            @NonNull final Jid address, final String password, final boolean loginAndBind) {
         Preconditions.checkArgument(
                 address.isBareJid(), "Account should be specified without resource");
         Preconditions.checkArgument(password != null, "Missing password");
@@ -26,6 +30,7 @@ public class AccountRepository extends AbstractRepository {
         final var entity = new AccountEntity();
         entity.address = address;
         entity.enabled = true;
+        entity.loginAndBind = loginAndBind;
         entity.randomSeed = randomSeed;
         final long id = database.accountDao().insert(entity);
         final var account = new Account(id, address, entity.randomSeed);
@@ -38,8 +43,23 @@ public class AccountRepository extends AbstractRepository {
         return account;
     }
 
+    public ListenableFuture<Account> createAccountAsync(
+            final @NonNull Jid address, final String password, final boolean loginAndBind) {
+        return Futures.submit(() -> createAccount(address, password, loginAndBind), IO_EXECUTOR);
+    }
+
     public ListenableFuture<Account> createAccountAsync(
             final @NonNull Jid address, final String password) {
-        return Futures.submit(() -> createAccount(address, password), IO_EXECUTOR);
+        return createAccountAsync(address, password, true);
+    }
+
+    public ListenableFuture<RegistrationManager.Registration> getRegistration(
+            final Account account) {
+        final ListenableFuture<XmppConnection> connectedFuture =
+                ConnectionPool.getInstance(context).reconfigure(account).asConnectedFuture();
+        return Futures.transformAsync(
+                connectedFuture,
+                xc -> xc.getManager(RegistrationManager.class).getRegistration(),
+                MoreExecutors.directExecutor());
     }
 }

src/main/java/im/conversations/android/xmpp/XmppConnection.java

@@ -118,10 +118,14 @@ import javax.net.ssl.SSLSocketFactory;
 import javax.net.ssl.X509KeyManager;
 import javax.net.ssl.X509TrustManager;
 import okhttp3.HttpUrl;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.xmlpull.v1.XmlPullParserException;
 
 public class XmppConnection implements Runnable {
 
+    private static final Logger LOGGER = LoggerFactory.getLogger(XmppConnection.class);
+
     protected final Account account;
     private final SparseArray<Stanza> mStanzaQueue = new SparseArray<>();
     private final Hashtable<String, Pair<Iq, Consumer<Iq>>> packetCallbacks = new Hashtable<>();
@@ -289,9 +293,9 @@ public class XmppConnection implements Runnable {
         try {
             Socket localSocket;
             shouldAuthenticate =
-                    !ConversationsDatabase.getInstance(context)
+                    ConversationsDatabase.getInstance(context)
                             .accountDao()
-                            .pendingRegistration(account.id);
+                            .loginAndBind(account.id);
             this.changeStatus(ConnectionState.CONNECTING);
             // TODO introduce proxy check
             final boolean useTor = /*fcontext.useTorToConnect() ||*/ account.isOnion();
@@ -1177,7 +1181,7 @@ public class XmppConnection implements Runnable {
         final SSLSocket sslSocket = upgradeSocketToTls(socket);
         tagReader.setInputStream(sslSocket.getInputStream());
         tagWriter.setOutputStream(sslSocket.getOutputStream());
-        Log.d(Config.LOGTAG, account.address + ": TLS connection established");
+        LOGGER.info("TLS connection established");
         final boolean quickStart;
         try {
             quickStart = establishStream(SSLSockets.version(sslSocket));
@@ -1234,13 +1238,10 @@ public class XmppConnection implements Runnable {
     }
 
     private void processStreamFeatures(final Tag currentTag) throws IOException {
-        final boolean pendingRegistration =
+        final boolean loginAndBind =
-                ConversationsDatabase.getInstance(context)
+                ConversationsDatabase.getInstance(context).accountDao().loginAndBind(account.id);
-                        .accountDao()
-                        .pendingRegistration(account.id);
         this.streamFeatures = tagReader.readElement(currentTag, Features.class);
-        final boolean isSecure = isSecure();
+        final boolean needsBinding = !isBound && loginAndBind;
-        final boolean needsBinding = !isBound && !pendingRegistration;
         if (this.quickStartInProgress) {
             if (this.streamFeatures.hasChild("authentication", Namespace.SASL_2)) {
                 Log.d(
@@ -1271,29 +1272,23 @@ public class XmppConnection implements Runnable {
             throw new StateChangingException(ConnectionState.INCOMPATIBLE_SERVER);
         }
         if (this.streamFeatures.hasChild("starttls", Namespace.TLS) && !this.encryptionEnabled) {
+            LOGGER.info("Negotiating TLS (STARTTLS)");
             sendStartTLS();
-        } else if (this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
+            return;
-                && pendingRegistration) {
+        } else if (!isSecure()) {
-            if (isSecure) {
+            LOGGER.error("Server does not support STARTTLS");
-                register();
-            } else {
-                Log.d(
-                        Config.LOGTAG,
-                        account.address
-                                + ": unable to find STARTTLS for registration process "
-                                + XmlHelper.printElementNames(this.streamFeatures));
             throw new StateChangingException(ConnectionState.INCOMPATIBLE_SERVER);
         }
-        } else if (!this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
+
-                && pendingRegistration) {
+        if (Boolean.FALSE.equals(loginAndBind)) {
-            throw new StateChangingException(ConnectionState.REGISTRATION_NOT_SUPPORTED);
+            LOGGER.info("No login and bind required. Connection is considered online");
+            this.lastPacketReceived = SystemClock.elapsedRealtime();
+            this.changeStatus(ConnectionState.ONLINE);
         } else if (this.streamFeatures.hasChild("authentication", Namespace.SASL_2)
-                && shouldAuthenticate
+                && shouldAuthenticate) {
-                && isSecure) {
             authenticate(SaslMechanism.Version.SASL_2);
         } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL)
-                && shouldAuthenticate
+                && shouldAuthenticate) {
-                && isSecure) {
             authenticate(SaslMechanism.Version.SASL);
         } else if (this.streamFeatures.streamManagement() && streamId != null && !inSmacksSession) {
             if (Config.EXTENDED_SM_LOGGING) {
@@ -1306,7 +1301,7 @@ public class XmppConnection implements Runnable {
             this.mWaitingForSmCatchup.set(true);
             this.tagWriter.writeStanzaAsync(resume);
         } else if (needsBinding) {
-            if (this.streamFeatures.hasChild("bind", Namespace.BIND) && isSecure) {
+            if (this.streamFeatures.hasChild("bind", Namespace.BIND)) {
                 sendBindRequest();
             } else {
                 Log.d(
@@ -1516,7 +1511,7 @@ public class XmppConnection implements Runnable {
         }
         final Iq preAuthRequest = new Iq(Iq.Type.SET);
         preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
-        sendUnmodifiedIqPacket(
+        sendIqPacketUnbound(
                 preAuthRequest,
                 (response) -> {
                     if (response.getType() == Iq.Type.RESULT) {
@@ -1526,15 +1521,14 @@ public class XmppConnection implements Runnable {
                         Log.d(Config.LOGTAG, account.address + ": failed to pre auth. " + error);
                         throw new StateChangingError(ConnectionState.REGISTRATION_INVALID_TOKEN);
                     }
-                },
+                });
-                true);
     }
 
     private void sendRegistryRequest() {
         final Iq retrieveRegistration = new Iq(Iq.Type.GET);
         retrieveRegistration.addExtension(new Register());
         retrieveRegistration.setTo(account.address.getDomain());
-        sendUnmodifiedIqPacket(
+        sendIqPacketUnbound(
                 retrieveRegistration,
                 (packet) -> {
                     if (packet.getType() == Iq.Type.TIMEOUT) {
@@ -1562,8 +1556,7 @@ public class XmppConnection implements Runnable {
                         register.addChild(username);
                         register.addChild(password);
                         registrationRequest.setFrom(account.address);
-                        sendUnmodifiedIqPacket(
+                        sendIqPacketUnbound(registrationRequest, this::handleRegistrationResponse);
-                                registrationRequest, this::handleRegistrationResponse, true);
                     } else if (query.hasChild("x", Namespace.DATA)) {
                         final Data data = Data.parse(query.findChild("x", Namespace.DATA));
                         final Element blob = query.findChild("data", "urn:xmpp:bob");
@@ -1621,15 +1614,14 @@ public class XmppConnection implements Runnable {
                         }
                         throw new StateChangingError(ConnectionState.REGISTRATION_FAILED);
                     }
-                },
+                });
-                true);
     }
 
     private void handleRegistrationResponse(final Iq packet) {
         if (packet.getType() == Iq.Type.RESULT) {
             ConversationsDatabase.getInstance(context)
                     .accountDao()
-                    .setPendingRegistration(account.id, false);
+                    .setLoginAndBind(account.id, true);
             Log.d(
                     Config.LOGTAG,
                     account.address + ": successfully registered new account on server");
@@ -1693,7 +1685,7 @@ public class XmppConnection implements Runnable {
         }
         final Iq iq = new Iq(Iq.Type.SET);
         iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
-        this.sendUnmodifiedIqPacket(
+        this.sendIqPacketUnbound(
                 iq,
                 (packet) -> {
                     if (packet.getType() == Iq.Type.TIMEOUT) {
@@ -1759,8 +1751,7 @@ public class XmppConnection implements Runnable {
                                         + ")");
                     }
                     throw new StateChangingError(ConnectionState.BIND_FAILURE);
-                },
+                });
-                true);
     }
 
     private void setConnectionAddress(final Jid jid) {
@@ -1813,7 +1804,7 @@ public class XmppConnection implements Runnable {
         Log.d(Config.LOGTAG, account.address + ": sending legacy session to outdated server");
         final Iq startSession = new Iq(Iq.Type.SET);
         startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
-        this.sendUnmodifiedIqPacket(
+        this.sendIqPacketUnbound(
                 startSession,
                 (packet) -> {
                     if (packet.getType() == Iq.Type.RESULT) {
@@ -1822,8 +1813,7 @@ public class XmppConnection implements Runnable {
                     } else if (packet.getType() != Iq.Type.TIMEOUT) {
                         throw new StateChangingError(ConnectionState.SESSION_FAILURE);
                     }
-                },
+                });
-                true);
     }
 
     // TODO the return value is not used any more
@@ -2009,6 +1999,14 @@ public class XmppConnection implements Runnable {
     }
 
     public ListenableFuture<Iq> sendIqPacket(final Iq packet) {
+        return sendIqPacket(packet, false);
+    }
+
+    public ListenableFuture<Iq> sendIqPacketUnbound(final Iq packet) {
+        return sendIqPacket(packet, true);
+    }
+
+    private ListenableFuture<Iq> sendIqPacket(final Iq packet, final boolean sendToUnboundStream) {
         final SettableFuture<Iq> future = SettableFuture.create();
         sendIqPacket(
                 packet,
@@ -2021,17 +2019,21 @@ public class XmppConnection implements Runnable {
                     } else {
                         future.setException(new IqErrorException(result));
                     }
-                });
+                },
+                sendToUnboundStream);
         return future;
     }
 
-    public String sendIqPacket(final Iq packet, final Consumer<Iq> callback) {
+    public void sendIqPacket(final Iq packet, final Consumer<Iq> callback) {
-        packet.setFrom(account.address);
+        this.sendIqPacket(packet, callback, false);
-        return this.sendUnmodifiedIqPacket(packet, callback, false);
     }
 
-    public synchronized String sendUnmodifiedIqPacket(
+    public void sendIqPacketUnbound(final Iq packet, final Consumer<Iq> callback) {
-            final Iq packet, final Consumer<Iq> callback, boolean force) {
+        this.sendIqPacket(packet, callback, true);
+    }
+
+    private synchronized void sendIqPacket(
+            final Iq packet, final Consumer<Iq> callback, final boolean sendToUnboundStream) {
         if (Strings.isNullOrEmpty(packet.getId())) {
             packet.setId(IDs.medium());
         }
@@ -2040,8 +2042,7 @@ public class XmppConnection implements Runnable {
                 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
             }
         }
-        this.sendPacket(packet, force);
+        this.sendPacket(packet, sendToUnboundStream);
-        return packet.getId();
     }
 
     public void sendResultFor(final Iq request, final Extension... extensions) {
@@ -2079,14 +2080,15 @@ public class XmppConnection implements Runnable {
         sendPacket(packet, false);
     }
 
-    private synchronized void sendPacket(final StreamElement packet, final boolean force) {
+    private synchronized void sendPacket(
+            final StreamElement packet, final boolean sendToUnboundStream) {
         if (stanzasSent == Integer.MAX_VALUE) {
             resetStreamId();
             disconnect(true);
             return;
         }
         synchronized (this.mStanzaQueue) {
-            if (force || isBound) {
+            if (sendToUnboundStream || isBound) {
                 tagWriter.writeStanzaAsync(packet);
             } else {
                 Log.d(
@@ -2131,11 +2133,17 @@ public class XmppConnection implements Runnable {
     }
 
     public void sendPing() {
-        if (!r()) {
+        if (this.inSmacksSession) {
+            this.tagWriter.writeStanzaAsync(new Request());
+        } else {
             final Iq iq = new Iq(Iq.Type.GET);
             iq.setFrom(account.address);
             iq.addExtension(new Ping());
-            this.sendIqPacket(iq, null);
+            this.sendIqPacket(
+                    iq,
+                    response -> {
+                        LOGGER.info("Server responded to ping");
+                    });
         }
         this.lastPingSent = SystemClock.elapsedRealtime();
     }
@@ -2213,15 +2221,6 @@ public class XmppConnection implements Runnable {
         this.streamId = null;
     }
 
-    public boolean r() {
-        if (this.inSmacksSession) {
-            this.tagWriter.writeStanzaAsync(new Request());
-            return true;
-        } else {
-            return false;
-        }
-    }
-
     public int getTimeToNextAttempt() {
         final int additionalTime =
                 recentErrorConnectionState == ConnectionState.POLICY_VIOLATION ? 3 : 0;

src/main/java/im/conversations/android/xmpp/manager/RegistrationManager.java

@@ -10,16 +10,23 @@ import eu.siacs.conversations.xml.Namespace;
 import im.conversations.android.xmpp.XmppConnection;
 import im.conversations.android.xmpp.model.data.Data;
 import im.conversations.android.xmpp.model.oob.OutOfBandData;
+import im.conversations.android.xmpp.model.pars.PreAuth;
 import im.conversations.android.xmpp.model.register.Instructions;
 import im.conversations.android.xmpp.model.register.Password;
 import im.conversations.android.xmpp.model.register.Register;
 import im.conversations.android.xmpp.model.register.Remove;
 import im.conversations.android.xmpp.model.register.Username;
 import im.conversations.android.xmpp.model.stanza.Iq;
+import java.util.Arrays;
 import java.util.regex.Matcher;
+import okhttp3.HttpUrl;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class RegistrationManager extends AbstractManager {
 
+    private static final Logger LOGGER = LoggerFactory.getLogger(RegistrationManager.class);
+
     public RegistrationManager(Context context, XmppConnection connection) {
         super(context, connection);
     }
@@ -27,6 +34,7 @@ public class RegistrationManager extends AbstractManager {
     public ListenableFuture<Void> setPassword(final String password) {
         final var account = getAccount();
         final var iq = new Iq(Iq.Type.SET);
+        iq.setTo(account.address.getDomain());
         final var register = iq.addExtension(new Register());
         register.addUsername(account.address.getEscapedLocal());
         register.addPassword(password);
@@ -36,6 +44,7 @@ public class RegistrationManager extends AbstractManager {
 
     public ListenableFuture<Void> unregister() {
         final var iq = new Iq(Iq.Type.SET);
+        iq.setTo(getAccount().address.getDomain());
         final var register = iq.addExtension(new Register());
         register.addExtension(new Remove());
         return Futures.transform(
@@ -43,10 +52,11 @@ public class RegistrationManager extends AbstractManager {
     }
 
     public ListenableFuture<Registration> getRegistration() {
-        final var iq = new Iq(Iq.Type.SET);
+        final var iq = new Iq(Iq.Type.GET);
+        iq.setTo(getAccount().address.getDomain());
         iq.addExtension(new Register());
         return Futures.transform(
-                connection.sendIqPacket(iq),
+                connection.sendIqPacketUnbound(iq),
                 result -> {
                     final var register = result.getExtension(Register.class);
                     if (register == null) {
@@ -58,7 +68,11 @@ public class RegistrationManager extends AbstractManager {
                         return new SimpleRegistration();
                     }
                     final var data = register.getExtension(Data.class);
-                    if (data != null && Namespace.REGISTER.equals(data.getFormType())) {
+                    // note that the captcha namespace is incorrect here. That namespace is only
+                    // used in message challenges. ejabberd uses the incorrect namespace though
+                    if (data != null
+                            && Arrays.asList(Namespace.REGISTER, Namespace.CAPTCHA)
+                                    .contains(data.getFormType())) {
                         return new ExtendedRegistration(data);
                     }
                     final var oob = register.getExtension(OutOfBandData.class);
@@ -67,14 +81,14 @@ public class RegistrationManager extends AbstractManager {
                             instructions == null ? null : instructions.getContent();
                     final String redirectUrl = oob == null ? null : oob.getURL();
                     if (redirectUrl != null) {
-                        return new RedirectRegistration(redirectUrl);
+                        return RedirectRegistration.ifValid(redirectUrl);
                     }
                     if (instructionsText != null) {
                         final Matcher matcher = Patterns.WEB_URL.matcher(instructionsText);
                         if (matcher.find()) {
                             final String instructionsUrl =
                                     instructionsText.substring(matcher.start(), matcher.end());
-                            return new RedirectRegistration(instructionsUrl);
+                            return RedirectRegistration.ifValid(instructionsUrl);
                         }
                     }
                     throw new IllegalStateException("No supported registration method found");
@@ -82,7 +96,16 @@ public class RegistrationManager extends AbstractManager {
                 MoreExecutors.directExecutor());
     }
 
-    private abstract static class Registration {}
+    public ListenableFuture<Void> sendPreAuthentication(final String token) {
+        final var iq = new Iq(Iq.Type.GET);
+        iq.setTo(getAccount().address.getDomain());
+        final var preAuthentication = iq.addExtension(new PreAuth());
+        preAuthentication.setToken(token);
+        return Futures.transform(
+                connection.sendIqPacketUnbound(iq), result -> null, MoreExecutors.directExecutor());
+    }
+
+    public abstract static class Registration {}
 
     // only requires Username + Password
     public static class SimpleRegistration extends Registration {}
@@ -102,14 +125,23 @@ public class RegistrationManager extends AbstractManager {
 
     // Redirection as show here: https://xmpp.org/extensions/xep-0077.html#redirect
     public static class RedirectRegistration extends Registration {
-        private final String url;
+        private final HttpUrl url;
 
-        public RedirectRegistration(@NonNull final String url) {
+        private RedirectRegistration(@NonNull HttpUrl url) {
             this.url = url;
         }
 
-        public @NonNull String getURL() {
+        public @NonNull HttpUrl getURL() {
             return this.url;
         }
+
+        public static RedirectRegistration ifValid(final String url) {
+            final HttpUrl httpUrl = HttpUrl.parse(url);
+            if (httpUrl != null && httpUrl.isHttps()) {
+                return new RedirectRegistration(httpUrl);
+            }
+            throw new IllegalStateException(
+                    "A URL found the registration instructions is not valid");
+        }
     }
 }

src/main/java/im/conversations/android/xmpp/model/pars/PreAuth.java

@@ -0,0 +1,17 @@
+package im.conversations.android.xmpp.model.pars;
+
+import eu.siacs.conversations.xml.Namespace;
+import im.conversations.android.annotation.XmlElement;
+import im.conversations.android.xmpp.model.Extension;
+
+@XmlElement(namespace = Namespace.PARS)
+public class PreAuth extends Extension {
+
+    public PreAuth() {
+        super(PreAuth.class);
+    }
+
+    public void setToken(final String token) {
+        this.setAttribute("token", token);
+    }
+}

src/main/java/im/conversations/android/xmpp/processor/BindProcessor.java

@@ -24,14 +24,6 @@ public class BindProcessor extends XmppConnection.Delegate implements Consumer<J
         final var account = getAccount();
         final var database = getDatabase();
 
-        final boolean firstLogin =
-                database.accountDao().setLoggedInSuccessfully(account.id, true) > 0;
-
-        if (firstLogin) {
-            // TODO publish display name if this is the first attempt
-            // IIRC this is used when the display name is set from a certificate or something
-        }
-
         database.presenceDao().deletePresences(account.id);
 
         getManager(RosterManager.class).fetch();