1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
package eu.siacs.conversations.generator;
import net.java.otr4j.OtrException;
import net.java.otr4j.session.Session;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
import eu.siacs.conversations.Config;
import eu.siacs.conversations.crypto.axolotl.AxolotlService;
import eu.siacs.conversations.crypto.axolotl.XmppAxolotlMessage;
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.services.XmppConnectionService;
import eu.siacs.conversations.xml.Element;
import eu.siacs.conversations.xmpp.chatstate.ChatState;
import eu.siacs.conversations.xmpp.jid.Jid;
import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
public class MessageGenerator extends AbstractGenerator {
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";
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";
private static final String PGP_FALLBACK_MESSAGE = "I sent you a PGP encrypted message but your client doesn’t seem to support that.";
public MessageGenerator(XmppConnectionService service) {
super(service);
}
private MessagePacket preparePacket(Message message) {
Conversation conversation = message.getConversation();
Account account = conversation.getAccount();
MessagePacket packet = new MessagePacket();
if (conversation.getMode() == Conversation.MODE_SINGLE) {
packet.setTo(message.getCounterpart());
packet.setType(MessagePacket.TYPE_CHAT);
packet.addChild("markable", "urn:xmpp:chat-markers:0");
if (this.mXmppConnectionService.indicateReceived()) {
packet.addChild("request", "urn:xmpp:receipts");
}
} else if (message.getType() == Message.TYPE_PRIVATE) {
packet.setTo(message.getCounterpart());
packet.setType(MessagePacket.TYPE_CHAT);
if (this.mXmppConnectionService.indicateReceived()) {
packet.addChild("request", "urn:xmpp:receipts");
}
} else {
packet.setTo(message.getCounterpart().toBareJid());
packet.setType(MessagePacket.TYPE_GROUPCHAT);
}
packet.setFrom(account.getJid());
packet.setId(message.getUuid());
if (message.edited()) {
packet.addChild("replace","urn:xmpp:message-correct:0").setAttribute("id",message.getEditedId());
}
return packet;
}
public void addDelay(MessagePacket packet, long timestamp) {
final SimpleDateFormat mDateFormat = new SimpleDateFormat(
"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
mDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
Element delay = packet.addChild("delay", "urn:xmpp:delay");
Date date = new Date(timestamp);
delay.setAttribute("stamp", mDateFormat.format(date));
}
public MessagePacket generateAxolotlChat(Message message, XmppAxolotlMessage axolotlMessage) {
MessagePacket packet = preparePacket(message);
if (axolotlMessage == null) {
return null;
}
packet.setAxolotlMessage(axolotlMessage.toElement());
if (Config.supportUnencrypted() && !recipientSupportsOmemo(message)) {
packet.setBody(OMEMO_FALLBACK_MESSAGE);
}
packet.addChild("store", "urn:xmpp:hints");
packet.addChild("encryption","urn:xmpp:eme:0")
.setAttribute("name","OMEMO")
.setAttribute("namespace",AxolotlService.PEP_PREFIX);
return packet;
}
private static boolean recipientSupportsOmemo(Message message) {
Contact c = message.getContact();
return c != null && c.getPresences().allOrNonSupport(AxolotlService.PEP_DEVICE_LIST_NOTIFY);
}
public static void addMessageHints(MessagePacket packet) {
packet.addChild("private", "urn:xmpp:carbons:2");
packet.addChild("no-copy", "urn:xmpp:hints");
packet.addChild("no-permanent-store", "urn:xmpp:hints");
packet.addChild("no-permanent-storage", "urn:xmpp:hints"); //do not copy this. this is wrong. it is *store*
}
public MessagePacket generateOtrChat(Message message) {
Session otrSession = message.getConversation().getOtrSession();
if (otrSession == null) {
return null;
}
MessagePacket packet = preparePacket(message);
addMessageHints(packet);
try {
String content;
if (message.hasFileOnRemoteHost()) {
content = message.getFileParams().url.toString();
} else {
content = message.getBody();
}
packet.setBody(otrSession.transformSending(content)[0]);
packet.addChild("encryption","urn:xmpp:eme:0")
.setAttribute("namespace","urn:xmpp:otr:0");
return packet;
} catch (OtrException e) {
return null;
}
}
public MessagePacket generateChat(Message message) {
MessagePacket packet = preparePacket(message);
String content;
if (message.hasFileOnRemoteHost()) {
Message.FileParams fileParams = message.getFileParams();
content = fileParams.url.toString();
packet.addChild("x","jabber:x:oob").addChild("url").setContent(content);
} else {
content = message.getBody();
}
packet.setBody(content);
return packet;
}
public MessagePacket generatePgpChat(Message message) {
MessagePacket packet = preparePacket(message);
if (Config.supportUnencrypted()) {
packet.setBody(PGP_FALLBACK_MESSAGE);
}
if (message.getEncryption() == Message.ENCRYPTION_DECRYPTED) {
packet.addChild("x", "jabber:x:encrypted").setContent(message.getEncryptedBody());
} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
packet.addChild("x", "jabber:x:encrypted").setContent(message.getBody());
}
packet.addChild("encryption","urn:xmpp:eme:0")
.setAttribute("namespace","jabber:x:encrypted");
return packet;
}
public MessagePacket generateChatState(Conversation conversation) {
final Account account = conversation.getAccount();
MessagePacket packet = new MessagePacket();
packet.setType(MessagePacket.TYPE_CHAT);
packet.setTo(conversation.getJid().toBareJid());
packet.setFrom(account.getJid());
packet.addChild(ChatState.toElement(conversation.getOutgoingChatState()));
packet.addChild("no-store", "urn:xmpp:hints");
packet.addChild("no-storage", "urn:xmpp:hints"); //wrong! don't copy this. Its *store*
return packet;
}
public MessagePacket confirm(final Account account, final Jid to, final String id) {
MessagePacket packet = new MessagePacket();
packet.setType(MessagePacket.TYPE_CHAT);
packet.setTo(to);
packet.setFrom(account.getJid());
Element received = packet.addChild("displayed","urn:xmpp:chat-markers:0");
received.setAttribute("id", id);
packet.addChild("store", "urn:xmpp:hints");
return packet;
}
public MessagePacket conferenceSubject(Conversation conversation,String subject) {
MessagePacket packet = new MessagePacket();
packet.setType(MessagePacket.TYPE_GROUPCHAT);
packet.setTo(conversation.getJid().toBareJid());
Element subjectChild = new Element("subject");
subjectChild.setContent(subject);
packet.addChild(subjectChild);
packet.setFrom(conversation.getAccount().getJid().toBareJid());
return packet;
}
public MessagePacket directInvite(final Conversation conversation, final Jid contact) {
MessagePacket packet = new MessagePacket();
packet.setType(MessagePacket.TYPE_NORMAL);
packet.setTo(contact);
packet.setFrom(conversation.getAccount().getJid());
Element x = packet.addChild("x", "jabber:x:conference");
x.setAttribute("jid", conversation.getJid().toBareJid().toString());
String password = conversation.getMucOptions().getPassword();
if (password != null) {
x.setAttribute("password",password);
}
return packet;
}
public MessagePacket invite(Conversation conversation, Jid contact) {
MessagePacket packet = new MessagePacket();
packet.setTo(conversation.getJid().toBareJid());
packet.setFrom(conversation.getAccount().getJid());
Element x = new Element("x");
x.setAttribute("xmlns", "http://jabber.org/protocol/muc#user");
Element invite = new Element("invite");
invite.setAttribute("to", contact.toBareJid().toString());
x.addChild(invite);
packet.addChild(x);
return packet;
}
public MessagePacket received(Account account, MessagePacket originalMessage, ArrayList<String> namespaces, int type) {
MessagePacket receivedPacket = new MessagePacket();
receivedPacket.setType(type);
receivedPacket.setTo(originalMessage.getFrom());
receivedPacket.setFrom(account.getJid());
for(String namespace : namespaces) {
receivedPacket.addChild("received", namespace).setAttribute("id", originalMessage.getId());
}
return receivedPacket;
}
public MessagePacket generateOtrError(Jid to, String id, String errorText) {
MessagePacket packet = new MessagePacket();
packet.setType(MessagePacket.TYPE_ERROR);
packet.setAttribute("id",id);
packet.setTo(to);
Element error = packet.addChild("error");
error.setAttribute("code","406");
error.setAttribute("type","modify");
error.addChild("not-acceptable","urn:ietf:params:xml:ns:xmpp-stanzas");
error.addChild("text").setContent("?OTR Error:" + errorText);
return packet;
}
}
|
