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;
19
20public abstract class AbstractGenerator {
21 private final String[] FEATURES = {
22 "urn:xmpp:jingle:1",
23 "urn:xmpp:jingle:apps:file-transfer:3",
24 "urn:xmpp:jingle:transports:s5b:1",
25 "urn:xmpp:jingle:transports:ibb:1",
26 "http://jabber.org/protocol/muc",
27 "jabber:x:conference",
28 "http://jabber.org/protocol/caps",
29 "http://jabber.org/protocol/disco#info",
30 "urn:xmpp:avatar:metadata+notify",
31 "http://jabber.org/protocol/nick+notify",
32 "urn:xmpp:ping",
33 "jabber:iq:version",
34 "http://jabber.org/protocol/chatstates"
35 };
36 private final String[] MESSAGE_CONFIRMATION_FEATURES = {
37 "urn:xmpp:chat-markers:0",
38 "urn:xmpp:receipts"
39 };
40 private final String[] MESSAGE_CORRECTION_FEATURES = {
41 "urn:xmpp:message-correct:0"
42 };
43 private String mVersion = null;
44 protected final String IDENTITY_NAME = "Conversations";
45 protected final String IDENTITY_TYPE = "phone";
46
47 private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US);
48
49 protected XmppConnectionService mXmppConnectionService;
50
51 protected AbstractGenerator(XmppConnectionService service) {
52 this.mXmppConnectionService = service;
53 }
54
55 protected String getIdentityVersion() {
56 if (mVersion == null) {
57 this.mVersion = PhoneHelper.getVersionName(mXmppConnectionService);
58 }
59 return this.mVersion;
60 }
61
62 public String getIdentityName() {
63 return IDENTITY_NAME + " " + getIdentityVersion();
64 }
65
66 public String getCapHash() {
67 StringBuilder s = new StringBuilder();
68 s.append("client/" + IDENTITY_TYPE + "//" + getIdentityName() + "<");
69 MessageDigest md;
70 try {
71 md = MessageDigest.getInstance("SHA-1");
72 } catch (NoSuchAlgorithmException e) {
73 return null;
74 }
75
76 for (String feature : getFeatures()) {
77 s.append(feature + "<");
78 }
79 byte[] sha1 = md.digest(s.toString().getBytes());
80 return new String(Base64.encode(sha1, Base64.DEFAULT)).trim();
81 }
82
83 public static String getTimestamp(long time) {
84 DATE_FORMAT.setTimeZone(TimeZone.getTimeZone("UTC"));
85 return DATE_FORMAT.format(time);
86 }
87
88 public List<String> getFeatures() {
89 ArrayList<String> features = new ArrayList<>();
90 features.addAll(Arrays.asList(FEATURES));
91 if (mXmppConnectionService.confirmMessages()) {
92 features.addAll(Arrays.asList(MESSAGE_CONFIRMATION_FEATURES));
93 }
94 if (mXmppConnectionService.allowMessageCorrection()) {
95 features.addAll(Arrays.asList(MESSAGE_CORRECTION_FEATURES));
96 }
97 if (Config.supportOmemo()) {
98 features.add(AxolotlService.PEP_DEVICE_LIST_NOTIFY);
99 }
100 Collections.sort(features);
101 return features;
102 }
103}