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.jid.Jid;
20import eu.siacs.conversations.xmpp.stanzas.IqPacket;
21
22public abstract class AbstractGenerator {
23 private final String[] FEATURES = {
24 "urn:xmpp:jingle:1",
25 "urn:xmpp:jingle:apps:file-transfer:3",
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 private final String[] MESSAGE_CONFIRMATION_FEATURES = {
38 "urn:xmpp:chat-markers:0",
39 "urn:xmpp:receipts"
40 };
41 private final String[] MESSAGE_CORRECTION_FEATURES = {
42 "urn:xmpp:message-correct:0"
43 };
44 private String mVersion = null;
45 protected final String IDENTITY_NAME = "Conversations";
46 protected final String IDENTITY_TYPE = "phone";
47
48 private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US);
49
50 protected XmppConnectionService mXmppConnectionService;
51
52 protected AbstractGenerator(XmppConnectionService service) {
53 this.mXmppConnectionService = service;
54 }
55
56 protected String getIdentityVersion() {
57 if (mVersion == null) {
58 this.mVersion = PhoneHelper.getVersionName(mXmppConnectionService);
59 }
60 return this.mVersion;
61 }
62
63 public String getIdentityName() {
64 return IDENTITY_NAME + " " + getIdentityVersion();
65 }
66
67 public String getCapHash() {
68 StringBuilder s = new StringBuilder();
69 s.append("client/" + IDENTITY_TYPE + "//" + getIdentityName() + "<");
70 MessageDigest md;
71 try {
72 md = MessageDigest.getInstance("SHA-1");
73 } catch (NoSuchAlgorithmException e) {
74 return null;
75 }
76
77 for (String feature : getFeatures()) {
78 s.append(feature + "<");
79 }
80 byte[] sha1 = md.digest(s.toString().getBytes());
81 return new String(Base64.encode(sha1, Base64.DEFAULT)).trim();
82 }
83
84 public static String getTimestamp(long time) {
85 DATE_FORMAT.setTimeZone(TimeZone.getTimeZone("UTC"));
86 return DATE_FORMAT.format(time);
87 }
88
89 public List<String> getFeatures() {
90 ArrayList<String> features = new ArrayList<>();
91 features.addAll(Arrays.asList(FEATURES));
92 if (mXmppConnectionService.confirmMessages()) {
93 features.addAll(Arrays.asList(MESSAGE_CONFIRMATION_FEATURES));
94 }
95 if (mXmppConnectionService.allowMessageCorrection()) {
96 features.addAll(Arrays.asList(MESSAGE_CORRECTION_FEATURES));
97 }
98 if (Config.supportOmemo()) {
99 features.add(AxolotlService.PEP_DEVICE_LIST_NOTIFY);
100 }
101 Collections.sort(features);
102 return features;
103 }
104}