1package eu.siacs.conversations.generator;
2
3import android.util.Base64;
4
5import java.security.MessageDigest;
6import java.security.NoSuchAlgorithmException;
7import java.text.SimpleDateFormat;
8import java.util.ArrayList;
9import java.util.Arrays;
10import java.util.Collections;
11import java.util.List;
12import java.util.Locale;
13import java.util.TimeZone;
14
15import eu.siacs.conversations.BuildConfig;
16import eu.siacs.conversations.Config;
17import eu.siacs.conversations.R;
18import eu.siacs.conversations.crypto.axolotl.AxolotlService;
19import eu.siacs.conversations.entities.Account;
20import eu.siacs.conversations.services.XmppConnectionService;
21import eu.siacs.conversations.utils.PhoneHelper;
22import eu.siacs.conversations.xml.Namespace;
23import eu.siacs.conversations.xmpp.XmppConnection;
24import eu.siacs.conversations.xmpp.jingle.stanzas.FileTransferDescription;
25
26public abstract class AbstractGenerator {
27 private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
28 private final String[] FEATURES = {
29 Namespace.JINGLE,
30 Namespace.JINGLE_APPS_FILE_TRANSFER,
31 Namespace.JINGLE_TRANSPORTS_S5B,
32 Namespace.JINGLE_TRANSPORTS_IBB,
33 Namespace.JINGLE_ENCRYPTED_TRANSPORT,
34 Namespace.JINGLE_ENCRYPTED_TRANSPORT_OMEMO,
35 "http://jabber.org/protocol/muc",
36 "jabber:x:conference",
37 Namespace.OOB,
38 "http://jabber.org/protocol/caps",
39 "http://jabber.org/protocol/disco#info",
40 "urn:xmpp:avatar:metadata+notify",
41 Namespace.NICK + "+notify",
42 "urn:xmpp:ping",
43 "jabber:iq:version",
44 "http://jabber.org/protocol/chatstates"
45 };
46 private final String[] MESSAGE_CONFIRMATION_FEATURES = {
47 "urn:xmpp:chat-markers:0",
48 "urn:xmpp:receipts"
49 };
50 private final String[] MESSAGE_CORRECTION_FEATURES = {
51 "urn:xmpp:message-correct:0"
52 };
53 private final String[] PRIVACY_SENSITIVE = {
54 "urn:xmpp:time" //XEP-0202: Entity Time leaks time zone
55 };
56 private final String[] VOIP_NAMESPACES = {
57 Namespace.JINGLE_TRANSPORT_ICE_UDP,
58 Namespace.JINGLE_FEATURE_AUDIO,
59 Namespace.JINGLE_FEATURE_VIDEO,
60 Namespace.JINGLE_APPS_RTP,
61 Namespace.JINGLE_APPS_DTLS,
62 Namespace.JINGLE_MESSAGE
63 };
64 protected XmppConnectionService mXmppConnectionService;
65
66 AbstractGenerator(XmppConnectionService service) {
67 this.mXmppConnectionService = service;
68 }
69
70 public static String getTimestamp(long time) {
71 DATE_FORMAT.setTimeZone(TimeZone.getTimeZone("UTC"));
72 return DATE_FORMAT.format(time);
73 }
74
75 String getIdentityVersion() {
76 return BuildConfig.VERSION_NAME;
77 }
78
79 String getIdentityName() {
80 return BuildConfig.APP_NAME;
81 }
82
83 String getIdentityType() {
84 if ("chromium".equals(android.os.Build.BRAND)) {
85 return "pc";
86 } else {
87 return mXmppConnectionService.getString(R.string.default_resource).toLowerCase();
88 }
89 }
90
91 String getCapHash(final Account account) {
92 StringBuilder s = new StringBuilder();
93 s.append("client/").append(getIdentityType()).append("//").append(getIdentityName()).append('<');
94 MessageDigest md;
95 try {
96 md = MessageDigest.getInstance("SHA-1");
97 } catch (NoSuchAlgorithmException e) {
98 return null;
99 }
100
101 for (String feature : getFeatures(account)) {
102 s.append(feature).append('<');
103 }
104 final byte[] sha1 = md.digest(s.toString().getBytes());
105 return Base64.encodeToString(sha1, Base64.NO_WRAP);
106 }
107
108 public List<String> getFeatures(Account account) {
109 final XmppConnection connection = account.getXmppConnection();
110 final ArrayList<String> features = new ArrayList<>(Arrays.asList(FEATURES));
111 if (mXmppConnectionService.confirmMessages()) {
112 features.addAll(Arrays.asList(MESSAGE_CONFIRMATION_FEATURES));
113 }
114 if (mXmppConnectionService.allowMessageCorrection()) {
115 features.addAll(Arrays.asList(MESSAGE_CORRECTION_FEATURES));
116 }
117 if (Config.supportOmemo()) {
118 features.add(AxolotlService.PEP_DEVICE_LIST_NOTIFY);
119 }
120 if (!mXmppConnectionService.useTorToConnect() && !account.isOnion()) {
121 features.addAll(Arrays.asList(PRIVACY_SENSITIVE));
122 features.addAll(Arrays.asList(VOIP_NAMESPACES));
123 features.add(Namespace.JINGLE_TRANSPORT_WEBRTC_DATA_CHANNEL);
124 }
125 if (mXmppConnectionService.broadcastLastActivity()) {
126 features.add(Namespace.IDLE);
127 }
128 if (connection != null && connection.getFeatures().bookmarks2()) {
129 features.add(Namespace.BOOKMARKS2 + "+notify");
130 } else {
131 features.add(Namespace.BOOKMARKS + "+notify");
132 }
133
134 Collections.sort(features);
135 return features;
136 }
137}