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