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