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.crypto.axolotl.AxolotlService;
17import eu.siacs.conversations.services.XmppConnectionService;
18import eu.siacs.conversations.utils.PhoneHelper;
19import eu.siacs.conversations.xmpp.jingle.stanzas.Content;
20
21public abstract class AbstractGenerator {
22 private final String[] FEATURES = {
23 "urn:xmpp:jingle:1",
24 Content.Version.FT_3.getNamespace(),
25 Content.Version.FT_4.getNamespace(),
26 "urn:xmpp:jingle:transports:s5b:1",
27 "urn:xmpp:jingle:transports:ibb:1",
28 "http://jabber.org/protocol/muc",
29 "jabber:x:conference",
30 "http://jabber.org/protocol/caps",
31 "http://jabber.org/protocol/disco#info",
32 "urn:xmpp:avatar:metadata+notify",
33 "http://jabber.org/protocol/nick+notify",
34 "urn:xmpp:ping",
35 "jabber:iq:version",
36 "http://jabber.org/protocol/chatstates"
37 };
38 private final String[] MESSAGE_CONFIRMATION_FEATURES = {
39 "urn:xmpp:chat-markers:0",
40 "urn:xmpp:receipts"
41 };
42 private final String[] MESSAGE_CORRECTION_FEATURES = {
43 "urn:xmpp:message-correct:0"
44 };
45 private String mVersion = null;
46 protected final String IDENTITY_NAME = "Conversations";
47 protected final String IDENTITY_TYPE = "phone";
48
49 private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
50
51 protected XmppConnectionService mXmppConnectionService;
52
53 protected AbstractGenerator(XmppConnectionService service) {
54 this.mXmppConnectionService = service;
55 }
56
57 protected String getIdentityVersion() {
58 if (mVersion == null) {
59 this.mVersion = PhoneHelper.getVersionName(mXmppConnectionService);
60 }
61 return this.mVersion;
62 }
63
64 public String getIdentityName() {
65 return IDENTITY_NAME + " " + getIdentityVersion();
66 }
67
68 public String getCapHash() {
69 StringBuilder s = new StringBuilder();
70 s.append("client/" + IDENTITY_TYPE + "//" + getIdentityName() + "<");
71 MessageDigest md;
72 try {
73 md = MessageDigest.getInstance("SHA-1");
74 } catch (NoSuchAlgorithmException e) {
75 return null;
76 }
77
78 for (String feature : getFeatures()) {
79 s.append(feature + "<");
80 }
81 byte[] sha1 = md.digest(s.toString().getBytes());
82 return new String(Base64.encode(sha1, Base64.DEFAULT)).trim();
83 }
84
85 public static String getTimestamp(long time) {
86 DATE_FORMAT.setTimeZone(TimeZone.getTimeZone("UTC"));
87 return DATE_FORMAT.format(time);
88 }
89
90 public List<String> getFeatures() {
91 ArrayList<String> features = new ArrayList<>();
92 features.addAll(Arrays.asList(FEATURES));
93 if (mXmppConnectionService.confirmMessages()) {
94 features.addAll(Arrays.asList(MESSAGE_CONFIRMATION_FEATURES));
95 }
96 if (mXmppConnectionService.allowMessageCorrection()) {
97 features.addAll(Arrays.asList(MESSAGE_CORRECTION_FEATURES));
98 }
99 if (Config.supportOmemo()) {
100 features.add(AxolotlService.PEP_DEVICE_LIST_NOTIFY);
101 }
102 Collections.sort(features);
103 return features;
104 }
105}