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.Config;
16import eu.siacs.conversations.R;
17import eu.siacs.conversations.crypto.axolotl.AxolotlService;
18import eu.siacs.conversations.entities.Account;
19import eu.siacs.conversations.services.XmppConnectionService;
20import eu.siacs.conversations.utils.PhoneHelper;
21import eu.siacs.conversations.xml.Namespace;
22import eu.siacs.conversations.xmpp.XmppConnection;
23import eu.siacs.conversations.xmpp.jingle.stanzas.FileTransferDescription;
24
25public abstract class AbstractGenerator {
26 private final String[] FEATURES = {
27 Namespace.JINGLE,
28
29 //Jingle File Transfer
30 FileTransferDescription.Version.FT_3.getNamespace(),
31 FileTransferDescription.Version.FT_4.getNamespace(),
32 FileTransferDescription.Version.FT_5.getNamespace(),
33 Namespace.JINGLE_TRANSPORTS_S5B,
34 Namespace.JINGLE_TRANSPORTS_IBB,
35 Namespace.JINGLE_ENCRYPTED_TRANSPORT,
36 Namespace.JINGLE_ENCRYPTED_TRANSPORT_OMEMO,
37
38 //VoIP
39 Namespace.JINGLE_TRANSPORT_ICE_UDP,
40 Namespace.JINGLE_FEATURE_AUDIO,
41 Namespace.JINGLE_FEATURE_VIDEO,
42 Namespace.JINGLE_APPS_RTP,
43 Namespace.JINGLE_APPS_DTLS,
44
45 "http://jabber.org/protocol/muc",
46 "jabber:x:conference",
47 Namespace.OOB,
48 "http://jabber.org/protocol/caps",
49 "http://jabber.org/protocol/disco#info",
50 "urn:xmpp:avatar:metadata+notify",
51 Namespace.NICK+"+notify",
52 "urn:xmpp:ping",
53 "jabber:iq:version",
54 "http://jabber.org/protocol/chatstates"
55 };
56 private final String[] MESSAGE_CONFIRMATION_FEATURES = {
57 "urn:xmpp:chat-markers:0",
58 "urn:xmpp:receipts"
59 };
60 private final String[] MESSAGE_CORRECTION_FEATURES = {
61 "urn:xmpp:message-correct:0"
62 };
63 private final String[] PRIVACY_SENSITIVE = {
64 "urn:xmpp:time" //XEP-0202: Entity Time leaks time zone
65 };
66 private String mVersion = null;
67
68 private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
69
70 protected XmppConnectionService mXmppConnectionService;
71
72 AbstractGenerator(XmppConnectionService service) {
73 this.mXmppConnectionService = service;
74 }
75
76 String getIdentityVersion() {
77 if (mVersion == null) {
78 this.mVersion = PhoneHelper.getVersionName(mXmppConnectionService);
79 }
80 return this.mVersion;
81 }
82
83 String getIdentityName() {
84 return mXmppConnectionService.getString(R.string.app_name);
85 }
86
87 public String getUserAgent() {
88 return mXmppConnectionService.getString(R.string.app_name) + '/' + getIdentityVersion();
89 }
90
91 String getIdentityType() {
92 if ("chromium".equals(android.os.Build.BRAND)) {
93 return "pc";
94 } else {
95 return mXmppConnectionService.getString(R.string.default_resource).toLowerCase();
96 }
97 }
98
99 String getCapHash(final Account account) {
100 StringBuilder s = new StringBuilder();
101 s.append("client/").append(getIdentityType()).append("//").append(getIdentityName()).append('<');
102 MessageDigest md;
103 try {
104 md = MessageDigest.getInstance("SHA-1");
105 } catch (NoSuchAlgorithmException e) {
106 return null;
107 }
108
109 for (String feature : getFeatures(account)) {
110 s.append(feature).append('<');
111 }
112 final byte[] sha1 = md.digest(s.toString().getBytes());
113 return Base64.encodeToString(sha1, Base64.NO_WRAP);
114 }
115
116 public static String getTimestamp(long time) {
117 DATE_FORMAT.setTimeZone(TimeZone.getTimeZone("UTC"));
118 return DATE_FORMAT.format(time);
119 }
120
121 public List<String> getFeatures(Account account) {
122 final XmppConnection connection = account.getXmppConnection();
123 final ArrayList<String> features = new ArrayList<>(Arrays.asList(FEATURES));
124 if (mXmppConnectionService.confirmMessages()) {
125 features.addAll(Arrays.asList(MESSAGE_CONFIRMATION_FEATURES));
126 }
127 if (mXmppConnectionService.allowMessageCorrection()) {
128 features.addAll(Arrays.asList(MESSAGE_CORRECTION_FEATURES));
129 }
130 if (Config.supportOmemo()) {
131 features.add(AxolotlService.PEP_DEVICE_LIST_NOTIFY);
132 }
133 if (!mXmppConnectionService.useTorToConnect() && !account.isOnion()) {
134 features.addAll(Arrays.asList(PRIVACY_SENSITIVE));
135 }
136 if (mXmppConnectionService.broadcastLastActivity()) {
137 features.add(Namespace.IDLE);
138 }
139 if (connection != null && connection.getFeatures().bookmarks2()) {
140 features.add(Namespace.BOOKMARKS2 +"+notify");
141 } else {
142 features.add(Namespace.BOOKMARKS+"+notify");
143 }
144
145 Collections.sort(features);
146 return features;
147 }
148}