237 lines
9.0 KiB
Java
237 lines
9.0 KiB
Java
package eu.siacs.conversations.generator;
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import net.java.otr4j.OtrException;
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import net.java.otr4j.session.Session;
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import java.text.SimpleDateFormat;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.Locale;
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import java.util.TimeZone;
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import eu.siacs.conversations.Config;
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import eu.siacs.conversations.crypto.axolotl.AxolotlService;
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import eu.siacs.conversations.crypto.axolotl.XmppAxolotlMessage;
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import eu.siacs.conversations.entities.Account;
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import eu.siacs.conversations.entities.Contact;
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import eu.siacs.conversations.entities.Conversation;
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import eu.siacs.conversations.entities.Message;
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import eu.siacs.conversations.services.XmppConnectionService;
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import eu.siacs.conversations.xml.Element;
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import eu.siacs.conversations.xmpp.chatstate.ChatState;
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import eu.siacs.conversations.xmpp.jid.Jid;
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import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
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public class MessageGenerator extends AbstractGenerator {
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public static final String OTR_FALLBACK_MESSAGE = "I would like to start a private (OTR encrypted) conversation but your client doesn’t seem to support that";
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private static final String OMEMO_FALLBACK_MESSAGE = "I sent you an OMEMO encrypted message but your client doesn’t seem to support that. Find more information on https://conversations.im/omemo";
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private static final String PGP_FALLBACK_MESSAGE = "I sent you a PGP encrypted message but your client doesn’t seem to support that.";
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public MessageGenerator(XmppConnectionService service) {
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super(service);
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}
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private MessagePacket preparePacket(Message message) {
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Conversation conversation = message.getConversation();
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Account account = conversation.getAccount();
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MessagePacket packet = new MessagePacket();
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if (conversation.getMode() == Conversation.MODE_SINGLE) {
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packet.setTo(message.getCounterpart());
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packet.setType(MessagePacket.TYPE_CHAT);
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packet.addChild("markable", "urn:xmpp:chat-markers:0");
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if (this.mXmppConnectionService.indicateReceived()) {
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packet.addChild("request", "urn:xmpp:receipts");
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}
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} else if (message.getType() == Message.TYPE_PRIVATE) {
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packet.setTo(message.getCounterpart());
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packet.setType(MessagePacket.TYPE_CHAT);
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if (this.mXmppConnectionService.indicateReceived()) {
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packet.addChild("request", "urn:xmpp:receipts");
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}
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} else {
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packet.setTo(message.getCounterpart().toBareJid());
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packet.setType(MessagePacket.TYPE_GROUPCHAT);
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}
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packet.setFrom(account.getJid());
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packet.setId(message.getUuid());
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if (message.edited()) {
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packet.addChild("replace","urn:xmpp:message-correct:0").setAttribute("id",message.getEditedId());
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}
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return packet;
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}
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public void addDelay(MessagePacket packet, long timestamp) {
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final SimpleDateFormat mDateFormat = new SimpleDateFormat(
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"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
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mDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
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Element delay = packet.addChild("delay", "urn:xmpp:delay");
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Date date = new Date(timestamp);
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delay.setAttribute("stamp", mDateFormat.format(date));
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}
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public MessagePacket generateAxolotlChat(Message message, XmppAxolotlMessage axolotlMessage) {
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MessagePacket packet = preparePacket(message);
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if (axolotlMessage == null) {
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return null;
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}
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packet.setAxolotlMessage(axolotlMessage.toElement());
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if (Config.supportUnencrypted() && !recipientSupportsOmemo(message)) {
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packet.setBody(OMEMO_FALLBACK_MESSAGE);
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}
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packet.addChild("store", "urn:xmpp:hints");
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packet.addChild("encryption","urn:xmpp:eme:0")
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.setAttribute("name","OMEMO")
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.setAttribute("namespace",AxolotlService.PEP_PREFIX);
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return packet;
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}
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private static boolean recipientSupportsOmemo(Message message) {
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Contact c = message.getContact();
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return c != null && c.getPresences().allOrNonSupport(AxolotlService.PEP_DEVICE_LIST_NOTIFY);
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}
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public static void addMessageHints(MessagePacket packet) {
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packet.addChild("private", "urn:xmpp:carbons:2");
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packet.addChild("no-copy", "urn:xmpp:hints");
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packet.addChild("no-permanent-store", "urn:xmpp:hints");
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packet.addChild("no-permanent-storage", "urn:xmpp:hints"); //do not copy this. this is wrong. it is *store*
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}
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public MessagePacket generateOtrChat(Message message) {
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Session otrSession = message.getConversation().getOtrSession();
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if (otrSession == null) {
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return null;
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}
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MessagePacket packet = preparePacket(message);
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addMessageHints(packet);
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try {
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String content;
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if (message.hasFileOnRemoteHost()) {
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content = message.getFileParams().url.toString();
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} else {
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content = message.getBody();
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}
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packet.setBody(otrSession.transformSending(content)[0]);
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packet.addChild("encryption","urn:xmpp:eme:0")
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.setAttribute("namespace","urn:xmpp:otr:0");
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return packet;
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} catch (OtrException e) {
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return null;
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}
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}
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public MessagePacket generateChat(Message message) {
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MessagePacket packet = preparePacket(message);
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String content;
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if (message.hasFileOnRemoteHost()) {
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Message.FileParams fileParams = message.getFileParams();
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content = fileParams.url.toString();
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packet.addChild("x","jabber:x:oob").addChild("url").setContent(content);
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} else {
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content = message.getBody();
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}
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packet.setBody(content);
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return packet;
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}
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public MessagePacket generatePgpChat(Message message) {
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MessagePacket packet = preparePacket(message);
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if (Config.supportUnencrypted()) {
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packet.setBody(PGP_FALLBACK_MESSAGE);
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}
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if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
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packet.addChild("x", "jabber:x:encrypted").setContent(message.getEncryptedBody());
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} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
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packet.addChild("x", "jabber:x:encrypted").setContent(message.getBody());
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}
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packet.addChild("encryption","urn:xmpp:eme:0")
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.setAttribute("namespace","jabber:x:encrypted");
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return packet;
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}
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public MessagePacket generateChatState(Conversation conversation) {
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final Account account = conversation.getAccount();
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MessagePacket packet = new MessagePacket();
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packet.setType(MessagePacket.TYPE_CHAT);
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packet.setTo(conversation.getJid().toBareJid());
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packet.setFrom(account.getJid());
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packet.addChild(ChatState.toElement(conversation.getOutgoingChatState()));
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packet.addChild("no-store", "urn:xmpp:hints");
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packet.addChild("no-storage", "urn:xmpp:hints"); //wrong! don't copy this. Its *store*
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return packet;
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}
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public MessagePacket confirm(final Account account, final Jid to, final String id) {
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MessagePacket packet = new MessagePacket();
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packet.setType(MessagePacket.TYPE_CHAT);
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packet.setTo(to);
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packet.setFrom(account.getJid());
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Element received = packet.addChild("displayed","urn:xmpp:chat-markers:0");
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received.setAttribute("id", id);
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packet.addChild("store", "urn:xmpp:hints");
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return packet;
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}
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public MessagePacket conferenceSubject(Conversation conversation,String subject) {
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MessagePacket packet = new MessagePacket();
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packet.setType(MessagePacket.TYPE_GROUPCHAT);
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packet.setTo(conversation.getJid().toBareJid());
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Element subjectChild = new Element("subject");
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subjectChild.setContent(subject);
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packet.addChild(subjectChild);
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packet.setFrom(conversation.getAccount().getJid().toBareJid());
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return packet;
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}
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public MessagePacket directInvite(final Conversation conversation, final Jid contact) {
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MessagePacket packet = new MessagePacket();
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packet.setType(MessagePacket.TYPE_NORMAL);
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packet.setTo(contact);
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packet.setFrom(conversation.getAccount().getJid());
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Element x = packet.addChild("x", "jabber:x:conference");
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x.setAttribute("jid", conversation.getJid().toBareJid().toString());
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String password = conversation.getMucOptions().getPassword();
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if (password != null) {
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x.setAttribute("password",password);
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}
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return packet;
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}
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public MessagePacket invite(Conversation conversation, Jid contact) {
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MessagePacket packet = new MessagePacket();
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packet.setTo(conversation.getJid().toBareJid());
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packet.setFrom(conversation.getAccount().getJid());
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Element x = new Element("x");
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x.setAttribute("xmlns", "http://jabber.org/protocol/muc#user");
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Element invite = new Element("invite");
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invite.setAttribute("to", contact.toBareJid().toString());
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x.addChild(invite);
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packet.addChild(x);
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return packet;
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}
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public MessagePacket received(Account account, MessagePacket originalMessage, ArrayList<String> namespaces, int type) {
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MessagePacket receivedPacket = new MessagePacket();
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receivedPacket.setType(type);
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receivedPacket.setTo(originalMessage.getFrom());
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receivedPacket.setFrom(account.getJid());
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for(String namespace : namespaces) {
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receivedPacket.addChild("received", namespace).setAttribute("id", originalMessage.getId());
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}
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return receivedPacket;
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}
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public MessagePacket generateOtrError(Jid to, String id, String errorText) {
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MessagePacket packet = new MessagePacket();
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packet.setType(MessagePacket.TYPE_ERROR);
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packet.setAttribute("id",id);
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packet.setTo(to);
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Element error = packet.addChild("error");
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error.setAttribute("code","406");
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error.setAttribute("type","modify");
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error.addChild("not-acceptable","urn:ietf:params:xml:ns:xmpp-stanzas");
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error.addChild("text").setContent("?OTR Error:" + errorText);
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return packet;
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}
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}
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