rebranding

7 files changed, 586 insertions, 0 deletions

diff --git a/src/eu/siacs/conversations/utils/DNSHelper.java b/src/eu/siacs/conversations/utils/DNSHelper.java
new file mode 100644
index 000000000..46fd69286
--- /dev/null
+++ b/src/eu/siacs/conversations/utils/DNSHelper.java
@@ -0,0 +1,93 @@
+package eu.siacs.conversations.utils;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.util.Random;
+
+import android.os.Bundle;
+import android.util.Log;
+
+public class DNSHelper {
+	public static Bundle getSRVRecord(String host) {
+		Bundle namePort = new Bundle();
+		try {
+			String[] hostParts = host.split("\\.");
+			byte[] transId = new byte[2];
+			Random random = new Random();
+			random.nextBytes(transId);
+			byte[] header = { 0x01, 0x20, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
+					0x00, 0x01, 0x0c, 0x5f, 0x78, 0x6d, 0x70, 0x70, 0x2d, 0x63,
+					0x6c, 0x69, 0x65, 0x6e, 0x74, 0x04, 0x5f, 0x74, 0x63, 0x70 };
+			byte[] rest = { 0x00, 0x00, 0x21, 0x00, 0x01, 0x00, 0x00, 0x29,
+					0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+			ByteArrayOutputStream output = new ByteArrayOutputStream();
+			output.write(transId);
+			output.write(header);
+			for (int i = 0; i < hostParts.length; ++i) {
+				char[] tmpChars = hostParts[i].toCharArray();
+				byte[] tmp = new byte[tmpChars.length];
+				for (int j = 0; j < tmpChars.length; ++j) {
+					tmp[j] = (byte) tmpChars[j];
+				}
+				output.write(tmp.length);
+				output.write(tmp);
+			}
+			output.write(rest);
+			byte[] sendPaket = output.toByteArray();
+			byte[] addr = { 0x8, 0x8, 0x8, 0x8 };
+			int realLenght = sendPaket.length - 11;
+			DatagramPacket packet = new DatagramPacket(sendPaket,
+					sendPaket.length, InetAddress.getByAddress(addr), 53);
+			DatagramSocket datagramSocket = new DatagramSocket();
+			datagramSocket.send(packet);
+			byte[] receiveData = new byte[1024];
+
+			DatagramPacket receivePacket = new DatagramPacket(receiveData,
+					receiveData.length);
+			datagramSocket.setSoTimeout(2000);
+			datagramSocket.receive(receivePacket);
+			if (receiveData[3]!=-128) {
+				namePort.putString("error", "nosrv");
+				return namePort;
+			}
+			namePort.putInt("port",calcPort(receiveData[realLenght + 16],
+							receiveData[realLenght + 17]));
+			int i = realLenght + 18;
+			int wordLenght = 0;
+			StringBuilder builder = new StringBuilder();
+			while (receiveData[i] != 0) {
+				if (wordLenght > 0) {
+					builder.append((char) receiveData[i]);
+					--wordLenght;
+				} else {
+					wordLenght = receiveData[i];
+					builder.append(".");
+				}
+				++i;
+			}
+			builder.replace(0, 1, "");
+			namePort.putString("name",builder.toString());
+		} catch (IOException e) {
+			Log.d("xmppService","gut" + e.getMessage());
+		}
+		return namePort;
+	}
+
+	static int calcPort(byte hb, byte lb) {
+		return ((int) hb << 8) | ((int) lb & 0xFF);
+	}
+	
+	final protected static char[] hexArray = "0123456789ABCDEF".toCharArray();
+	public static String bytesToHex(byte[] bytes) {
+	    char[] hexChars = new char[bytes.length * 2];
+	    for ( int j = 0; j < bytes.length; j++ ) {
+	        int v = bytes[j] & 0xFF;
+	        hexChars[j * 2] = hexArray[v >>> 4];
+	        hexChars[j * 2 + 1] = hexArray[v & 0x0F];
+	    }
+	    return new String(hexChars);
+	}
+}
diff --git a/src/eu/siacs/conversations/utils/MessageParser.java b/src/eu/siacs/conversations/utils/MessageParser.java
new file mode 100644
index 000000000..dc0cd35cf
--- /dev/null
+++ b/src/eu/siacs/conversations/utils/MessageParser.java
@@ -0,0 +1,149 @@
+package eu.siacs.conversations.utils;
+
+import java.util.List;
+
+import net.java.otr4j.session.Session;
+import net.java.otr4j.session.SessionStatus;
+import android.util.Log;
+import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.entities.Conversation;
+import eu.siacs.conversations.entities.Message;
+import eu.siacs.conversations.services.XmppConnectionService;
+import eu.siacs.conversations.xml.Element;
+import eu.siacs.conversations.xmpp.MessagePacket;
+
+public class MessageParser {
+	
+	protected static final String LOGTAG = "xmppService";
+	
+	public static Message parsePlainTextChat(MessagePacket packet, Account account, XmppConnectionService service) {
+		String[] fromParts = packet.getFrom().split("/");
+		Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
+		String body = packet.getBody();
+		return new Message(conversation, packet.getFrom(), body, Message.ENCRYPTION_NONE, Message.STATUS_RECIEVED);
+	}
+	
+	public static Message parsePgpChat(String pgpBody, MessagePacket packet, Account account, XmppConnectionService service) {
+		String[] fromParts = packet.getFrom().split("/");
+		Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
+		return new Message(conversation, packet.getFrom(), pgpBody, Message.ENCRYPTION_PGP, Message.STATUS_RECIEVED);
+	}
+	
+	public static Message parseOtrChat(MessagePacket packet, Account account, XmppConnectionService service) {
+		String[] fromParts = packet.getFrom().split("/");
+		Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
+		String body = packet.getBody();
+		if (!conversation.hasValidOtrSession()) {
+			conversation.startOtrSession(service.getApplicationContext(), fromParts[1]);
+		}
+		try {
+			Session otrSession = conversation.getOtrSession();
+			SessionStatus before = otrSession
+					.getSessionStatus();
+			body = otrSession.transformReceiving(body);
+			SessionStatus after = otrSession.getSessionStatus();
+			if ((before != after)
+					&& (after == SessionStatus.ENCRYPTED)) {
+				Log.d(LOGTAG, "otr session etablished");
+				List<Message> messages = conversation
+						.getMessages();
+				for (int i = 0; i < messages.size(); ++i) {
+					Message msg = messages.get(i);
+					if ((msg.getStatus() == Message.STATUS_UNSEND)
+							&& (msg.getEncryption() == Message.ENCRYPTION_OTR)) {
+						MessagePacket outPacket = service.prepareMessagePacket(
+								account, msg, otrSession);
+						msg.setStatus(Message.STATUS_SEND);
+						service.databaseBackend.updateMessage(msg);
+						account.getXmppConnection()
+								.sendMessagePacket(outPacket);
+					}
+				}
+				if (service.convChangedListener!=null) {
+					service.convChangedListener.onConversationListChanged();
+				}
+			} else if ((before != after) && (after == SessionStatus.FINISHED)) {
+				conversation.resetOtrSession();
+				Log.d(LOGTAG,"otr session stoped");
+			}
+		} catch (Exception e) {
+			Log.d(LOGTAG, "error receiving otr. resetting");
+			conversation.resetOtrSession();
+			return null;
+		}
+		if (body == null) {
+			return null;
+		}
+		return new Message(conversation, packet.getFrom(), body, Message.ENCRYPTION_OTR,Message.STATUS_RECIEVED);
+	}
+	
+	public static Message parseGroupchat(MessagePacket packet, Account account, XmppConnectionService service) {
+		int status;
+		String[] fromParts = packet.getFrom().split("/");
+		Conversation conversation = service.findOrCreateConversation(account, fromParts[0],true);
+		if ((fromParts.length == 1) || (packet.hasChild("subject"))) {
+			return null;
+		}
+		String counterPart = fromParts[1];
+		if (counterPart.equals(account.getUsername())) {
+			status = Message.STATUS_SEND;
+		} else {
+			status = Message.STATUS_RECIEVED;
+		}
+		return new Message(conversation, counterPart, packet.getBody(), Message.ENCRYPTION_NONE, status);
+	}
+
+	public static Message parseCarbonMessage(MessagePacket packet,
+			Account account, XmppConnectionService service) {
+		// TODO Auto-generated method stub
+		int status;
+		String fullJid;
+		Element forwarded;
+		if (packet.hasChild("received")) {
+			forwarded = packet.findChild("received").findChild(
+					"forwarded");
+			status = Message.STATUS_RECIEVED;
+		} else if (packet.hasChild("sent")) {
+			forwarded = packet.findChild("sent").findChild(
+					"forwarded");
+			status = Message.STATUS_SEND;
+		} else {
+			return null;
+		}
+		Element message = forwarded.findChild("message");
+		if ((message == null) || (!message.hasChild("body")))
+			return null; // either malformed or boring
+		if (status == Message.STATUS_RECIEVED) {
+			fullJid = message.getAttribute("from");
+		} else {
+			fullJid = message.getAttribute("to");
+		}
+		String[] parts = fullJid.split("/");
+		Conversation conversation = service.findOrCreateConversation(account, parts[0],false);
+		return new Message(conversation,fullJid, message.findChild("body").getContent(), Message.ENCRYPTION_NONE,status);
+	}
+
+	public static Message parseError(MessagePacket packet, Account account, XmppConnectionService service) {
+		
+			String[] fromParts = packet.getFrom().split("/");
+	Conversation conversation = service.findOrCreateConversation(account, fromParts[0],false);
+	Element error = packet.findChild("error");
+	String errorName = error.getChildren().get(0).getName();
+	String displayError;
+	if (errorName.equals("service-unavailable")) {
+		displayError = "Contact is offline and does not have offline storage";
+	} else {
+		displayError = errorName.replace("-", " ");
+	}
+	return new Message(conversation, packet.getFrom(), displayError, Message.ENCRYPTION_NONE, Message.STATUS_ERROR);
+	}
+
+	public static String getPgpBody(MessagePacket packet) {
+		for(Element child : packet.getChildren()) {
+			if (child.getName().equals("x")&&child.getAttribute("xmlns").equals("jabber:x:encrypted")) {
+				return child.getContent();
+			}
+		}
+		return null;
+	}
+}
diff --git a/src/eu/siacs/conversations/utils/OnPhoneContactsLoadedListener.java b/src/eu/siacs/conversations/utils/OnPhoneContactsLoadedListener.java
new file mode 100644
index 000000000..fa8cea04c
--- /dev/null
+++ b/src/eu/siacs/conversations/utils/OnPhoneContactsLoadedListener.java
@@ -0,0 +1,9 @@
+package eu.siacs.conversations.utils;
+
+import java.util.Hashtable;
+
+import android.os.Bundle;
+
+public interface OnPhoneContactsLoadedListener {
+	public void onPhoneContactsLoaded(Hashtable<String, Bundle> phoneContacts);
+}
diff --git a/src/eu/siacs/conversations/utils/PhoneHelper.java b/src/eu/siacs/conversations/utils/PhoneHelper.java
new file mode 100644
index 000000000..e28f817e7
--- /dev/null
+++ b/src/eu/siacs/conversations/utils/PhoneHelper.java
@@ -0,0 +1,87 @@
+package eu.siacs.conversations.utils;
+
+import java.util.Hashtable;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.CursorLoader;
+import android.content.Loader;
+import android.content.Loader.OnLoadCompleteListener;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.Looper;
+import android.provider.ContactsContract;
+import android.provider.ContactsContract.Profile;
+
+public class PhoneHelper {
+	
+	public static void loadPhoneContacts(Context context, final OnPhoneContactsLoadedListener listener) {
+		if (Looper.myLooper()==null) {
+			Looper.prepare();
+		}
+		final Looper mLooper = Looper.myLooper();
+		final Hashtable<String, Bundle> phoneContacts = new Hashtable<String, Bundle>();
+		
+		final String[] PROJECTION = new String[] {
+				ContactsContract.Data._ID,
+				ContactsContract.Data.DISPLAY_NAME,
+				ContactsContract.Data.PHOTO_THUMBNAIL_URI,
+				ContactsContract.Data.LOOKUP_KEY,
+				ContactsContract.CommonDataKinds.Im.DATA };
+
+		final String SELECTION = "(" + ContactsContract.Data.MIMETYPE + "=\""
+				+ ContactsContract.CommonDataKinds.Im.CONTENT_ITEM_TYPE
+				+ "\") AND (" + ContactsContract.CommonDataKinds.Im.PROTOCOL
+				+ "=\"" + ContactsContract.CommonDataKinds.Im.PROTOCOL_JABBER
+				+ "\")";
+		
+		CursorLoader mCursorLoader = new CursorLoader(context,
+				ContactsContract.Data.CONTENT_URI, PROJECTION, SELECTION, null,
+				null);
+		mCursorLoader.registerListener(0, new OnLoadCompleteListener<Cursor>() {
+
+			@Override
+			public void onLoadComplete(Loader<Cursor> arg0, Cursor cursor) {
+				while (cursor.moveToNext()) {
+					Bundle contact = new Bundle();
+					contact.putInt("phoneid", cursor.getInt(cursor
+							.getColumnIndex(ContactsContract.Data._ID)));
+					contact.putString(
+							"displayname",
+							cursor.getString(cursor
+									.getColumnIndex(ContactsContract.Data.DISPLAY_NAME)));
+					contact.putString(
+							"photouri",
+							cursor.getString(cursor
+									.getColumnIndex(ContactsContract.Data.PHOTO_THUMBNAIL_URI)));
+					contact.putString("lookup",cursor.getString(cursor
+							.getColumnIndex(ContactsContract.Data.LOOKUP_KEY)));
+					phoneContacts.put(
+							cursor.getString(cursor
+									.getColumnIndex(ContactsContract.CommonDataKinds.Im.DATA)),
+							contact);
+				}
+				if (listener!=null) {
+					listener.onPhoneContactsLoaded(phoneContacts);
+				}
+				mLooper.quit();
+			}
+		});
+		mCursorLoader.startLoading();
+	}
+
+	public static Uri getSefliUri(Activity activity) {
+		String[] mProjection = new String[] { Profile._ID,
+				Profile.PHOTO_THUMBNAIL_URI };
+		Cursor mProfileCursor = activity.getContentResolver().query(
+				Profile.CONTENT_URI, mProjection, null, null, null);
+
+		if (mProfileCursor.getCount()==0) {
+			return null;
+		} else {
+			mProfileCursor.moveToFirst();
+			return Uri.parse(mProfileCursor.getString(1));
+		}
+	}
+}
diff --git a/src/eu/siacs/conversations/utils/SASL.java b/src/eu/siacs/conversations/utils/SASL.java
new file mode 100644
index 000000000..cda1f97be
--- /dev/null
+++ b/src/eu/siacs/conversations/utils/SASL.java
@@ -0,0 +1,24 @@
+package eu.siacs.conversations.utils;
+
+import android.util.Base64;
+
+public class SASL {
+	public static String plain(String username, String password) {
+		byte[] userBytes = username.getBytes();
+		int userLenght = userBytes.length;
+		byte[] passwordBytes = password.getBytes();
+		byte[] saslBytes = new byte[userBytes.length+passwordBytes.length+2];
+		saslBytes[0] = 0x0;
+		for(int i = 1; i < saslBytes.length; ++i) {
+			if (i<=userLenght) {
+				saslBytes[i] = userBytes[i-1];
+			} else if (i==userLenght+1) {
+				saslBytes[i] = 0x0;
+			} else {
+				saslBytes[i] = passwordBytes[i-(userLenght+2)];
+			}
+		}
+		
+		return Base64.encodeToString(saslBytes, Base64.DEFAULT);
+	}
+}
diff --git a/src/eu/siacs/conversations/utils/UIHelper.java b/src/eu/siacs/conversations/utils/UIHelper.java
new file mode 100644
index 000000000..f79fe14cf
--- /dev/null
+++ b/src/eu/siacs/conversations/utils/UIHelper.java
@@ -0,0 +1,210 @@
+package eu.siacs.conversations.utils;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.List;
+
+import eu.siacs.conversations.R;
+import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.entities.Contact;
+import eu.siacs.conversations.entities.Conversation;
+import eu.siacs.conversations.entities.Message;
+import eu.siacs.conversations.ui.ConversationActivity;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.Notification;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.net.Uri;
+import android.preference.PreferenceManager;
+import android.provider.ContactsContract.Contacts;
+import android.support.v4.app.NotificationCompat;
+import android.support.v4.app.TaskStackBuilder;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.LinearLayout;
+import android.widget.QuickContactBadge;
+import android.widget.TextView;
+
+public class UIHelper {
+	public static String readableTimeDifference(long time) {
+		if (time == 0) {
+			return "just now";
+		}
+		Date date = new Date(time);
+		long difference = (System.currentTimeMillis() - time) / 1000;
+		if (difference < 60) {
+			return "just now";
+		} else if (difference < 60 * 10) {
+			return difference / 60 + " min ago";
+		} else if (difference < 60 * 60 * 24) {
+			SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
+			return sdf.format(date);
+		} else {
+			SimpleDateFormat sdf = new SimpleDateFormat("MM/dd");
+			return sdf.format(date);
+		}
+	}
+
+	public static Bitmap getUnknownContactPicture(String name, int size) {
+		String firstLetter = name.substring(0, 1).toUpperCase();
+
+		int holoColors[] = { 0xFF1da9da, 0xFFb368d9, 0xFF83b600, 0xFFffa713,
+				0xFFe92727 };
+
+		int color = holoColors[Math.abs(name.hashCode()) % holoColors.length];
+
+		Bitmap bitmap = Bitmap
+				.createBitmap(size, size, Bitmap.Config.ARGB_8888);
+		Canvas canvas = new Canvas(bitmap);
+
+		bitmap.eraseColor(color);
+
+		Paint paint = new Paint();
+		paint.setColor(0xffe5e5e5);
+		paint.setTextSize((float) (size * 0.9));
+		paint.setAntiAlias(true);
+		Rect rect = new Rect();
+		paint.getTextBounds(firstLetter, 0, 1, rect);
+		float width = paint.measureText(firstLetter);
+		canvas.drawText(firstLetter, (size / 2) - (width / 2), (size / 2)
+				+ (rect.height() / 2), paint);
+
+		return bitmap;
+	}
+	
+	public static Bitmap getErrorPicture(int size) {
+		Bitmap bitmap = Bitmap
+				.createBitmap(size, size, Bitmap.Config.ARGB_8888);
+		Canvas canvas = new Canvas(bitmap);
+
+		bitmap.eraseColor(0xFFe92727);
+
+		Paint paint = new Paint();
+		paint.setColor(0xffe5e5e5);
+		paint.setTextSize((float) (size * 0.9));
+		paint.setAntiAlias(true);
+		Rect rect = new Rect();
+		paint.getTextBounds("!", 0, 1, rect);
+		float width = paint.measureText("!");
+		canvas.drawText("!", (size / 2) - (width / 2), (size / 2)
+				+ (rect.height() / 2), paint);
+
+		return bitmap;
+	}
+
+	public static Notification getUnreadMessageNotification(Context context,
+			Conversation conversation) {
+
+		SharedPreferences sharedPref = PreferenceManager
+				.getDefaultSharedPreferences(context);
+		String ringtone = sharedPref.getString("notification_ringtone", null);
+
+		Resources res = context.getResources();
+		NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
+				context);
+		mBuilder.setLargeIcon(UIHelper.getUnknownContactPicture(conversation
+				.getName(), (int) res
+				.getDimension(android.R.dimen.notification_large_icon_width)));
+		mBuilder.setContentTitle(conversation.getName());
+		mBuilder.setTicker(conversation.getLatestMessage().getBody().trim());
+		StringBuilder bigText = new StringBuilder();
+		List<Message> messages = conversation.getMessages();
+		String firstLine = "";
+		for(int i = messages.size() -1; i >= 0; --i) {
+			if (!messages.get(i).isRead()) {
+				if (i == messages.size() -1 ) {
+					firstLine = messages.get(i).getBody().trim();
+					bigText.append(firstLine);
+				} else {
+					firstLine = messages.get(i).getBody().trim();
+					bigText.insert(0, firstLine+"\n");
+				}
+			} else {
+				break;
+			}
+		}
+		mBuilder.setContentText(firstLine);
+		mBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(bigText.toString()));
+		mBuilder.setSmallIcon(R.drawable.notification);
+		mBuilder.setLights(0xffffffff, 2000, 4000);
+		if (ringtone != null) {
+			mBuilder.setSound(Uri.parse(ringtone));
+		}
+
+		TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
+		stackBuilder.addParentStack(ConversationActivity.class);
+
+		Intent viewConversationIntent = new Intent(context,
+				ConversationActivity.class);
+		viewConversationIntent.setAction(Intent.ACTION_VIEW);
+		viewConversationIntent.putExtra(ConversationActivity.CONVERSATION,
+				conversation.getUuid());
+		viewConversationIntent.setType(ConversationActivity.VIEW_CONVERSATION);
+
+		stackBuilder.addNextIntent(viewConversationIntent);
+
+		PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,
+				PendingIntent.FLAG_UPDATE_CURRENT);
+
+		mBuilder.setContentIntent(resultPendingIntent);
+		return mBuilder.build();
+	}
+
+	public static void prepareContactBadge(final Activity activity,
+			QuickContactBadge badge, final Contact contact) {
+		if (contact.getSystemAccount()!=null) {
+			String[] systemAccount = contact.getSystemAccount().split("#");
+			long id = Long.parseLong(systemAccount[0]);
+			badge.assignContactUri(Contacts.getLookupUri(id, systemAccount[1]));
+	
+			if (contact.getProfilePhoto() != null) {
+				badge.setImageURI(Uri.parse(contact.getProfilePhoto()));
+			} else {
+				badge.setImageBitmap(UIHelper.getUnknownContactPicture(contact.getDisplayName(), 400));
+			}
+		} else {
+			badge.setImageBitmap(UIHelper.getUnknownContactPicture(contact.getDisplayName(), 400));
+		}
+
+	}
+	
+	public static AlertDialog getVerifyFingerprintDialog(final ConversationActivity activity,final Conversation conversation, final LinearLayout msg) {
+		final Contact contact = conversation.getContact();
+		final Account account = conversation.getAccount();
+		
+		AlertDialog.Builder builder = new AlertDialog.Builder(activity);
+		builder.setTitle("Verify fingerprint");
+		LayoutInflater inflater = activity.getLayoutInflater();
+		View view = inflater.inflate(R.layout.dialog_verify_otr, null);
+		TextView jid = (TextView) view.findViewById(R.id.verify_otr_jid);
+		TextView fingerprint = (TextView) view.findViewById(R.id.verify_otr_fingerprint);
+		TextView yourprint = (TextView) view.findViewById(R.id.verify_otr_yourprint);
+		
+		jid.setText(contact.getJid());
+		fingerprint.setText(conversation.getOtrFingerprint());
+		yourprint.setText(account.getOtrFingerprint());
+		builder.setNegativeButton("Cancel", null);
+		builder.setPositiveButton("Verify", new OnClickListener() {
+			
+			@Override
+			public void onClick(DialogInterface dialog, int which) {
+				contact.addOtrFingerprint(conversation.getOtrFingerprint());
+				msg.setVisibility(View.GONE);
+				activity.xmppConnectionService.updateContact(contact);
+			}
+		});
+		builder.setView(view);
+		return builder.create();
+	}
+}
diff --git a/src/eu/siacs/conversations/utils/Validator.java b/src/eu/siacs/conversations/utils/Validator.java
new file mode 100644
index 000000000..fce953aef
--- /dev/null
+++ b/src/eu/siacs/conversations/utils/Validator.java
@@ -0,0 +1,14 @@
+package eu.siacs.conversations.utils;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class Validator {
+	public static final Pattern VALID_JID = 
+		    Pattern.compile("^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,6}$", Pattern.CASE_INSENSITIVE);
+	
+	public static boolean isValidJid(String jid) {
+		Matcher matcher = VALID_JID.matcher(jid);
+		return matcher.find();
+	}
+}