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 "urn:xmpp:jingle:transports:s5b:1",
31 "urn:xmpp:jingle:transports:ibb:1",
32 "http://jabber.org/protocol/muc",
33 "jabber:x:conference",
34 Namespace.OOB,
35 "http://jabber.org/protocol/caps",
36 "http://jabber.org/protocol/disco#info",
37 "urn:xmpp:avatar:metadata+notify",
38 "http://jabber.org/protocol/nick+notify",
39 Namespace.BOOKMARKS+"+notify",
40 "urn:xmpp:ping",
41 "jabber:iq:version",
42 "http://jabber.org/protocol/chatstates"
43 };
44 private final String[] MESSAGE_CONFIRMATION_FEATURES = {
45 "urn:xmpp:chat-markers:0",
46 "urn:xmpp:receipts"
47 };
48 private final String[] MESSAGE_CORRECTION_FEATURES = {
49 "urn:xmpp:message-correct:0"
50 };
51 private final String[] PRIVACY_SENSITIVE = {
52 "urn:xmpp:time" //XEP-0202: Entity Time leaks time zone
53 };
54 private String mVersion = null;
55
56 private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
57
58 protected XmppConnectionService mXmppConnectionService;
59
60 AbstractGenerator(XmppConnectionService service) {
61 this.mXmppConnectionService = service;
62 }
63
64 String getIdentityVersion() {
65 if (mVersion == null) {
66 this.mVersion = PhoneHelper.getVersionName(mXmppConnectionService);
67 }
68 return this.mVersion;
69 }
70
71 public String getIdentityName() {
72 return mXmppConnectionService.getString(R.string.app_name) + " " + getIdentityVersion();
73 }
74
75 String getIdentityType() {
76 if ("chromium".equals(android.os.Build.BRAND)) {
77 return "pc";
78 } else {
79 return mXmppConnectionService.getString(R.string.default_resource).toLowerCase();
80 }
81 }
82
83 String getCapHash(final Account account) {
84 StringBuilder s = new StringBuilder();
85 s.append("client/").append(getIdentityType()).append("//").append(getIdentityName()).append('<');
86 MessageDigest md;
87 try {
88 md = MessageDigest.getInstance("SHA-1");
89 } catch (NoSuchAlgorithmException e) {
90 return null;
91 }
92
93 for (String feature : getFeatures(account)) {
94 s.append(feature).append('<');
95 }
96 byte[] sha1 = md.digest(s.toString().getBytes());
97 return new String(Base64.encode(sha1, Base64.DEFAULT)).trim();
98 }
99
100 public static String getTimestamp(long time) {
101 DATE_FORMAT.setTimeZone(TimeZone.getTimeZone("UTC"));
102 return DATE_FORMAT.format(time);
103 }
104
105 public List<String> getFeatures(Account account) {
106 ArrayList<String> features = new ArrayList<>(Arrays.asList(FEATURES));
107 if (mXmppConnectionService.confirmMessages()) {
108 features.addAll(Arrays.asList(MESSAGE_CONFIRMATION_FEATURES));
109 }
110 if (mXmppConnectionService.allowMessageCorrection()) {
111 features.addAll(Arrays.asList(MESSAGE_CORRECTION_FEATURES));
112 }
113 if (Config.supportOmemo()) {
114 features.add(AxolotlService.PEP_DEVICE_LIST_NOTIFY);
115 }
116 if (!mXmppConnectionService.useTorToConnect() && !account.isOnion()) {
117 features.addAll(Arrays.asList(PRIVACY_SENSITIVE));
118 }
119 if (mXmppConnectionService.broadcastLastActivity()) {
120 features.add(Namespace.IDLE);
121 }
122 Collections.sort(features);
123 return features;
124 }
125}