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.crypto.axolotl.AxolotlService;
16import eu.siacs.conversations.services.XmppConnectionService;
17import eu.siacs.conversations.utils.PhoneHelper;
18
19public abstract class AbstractGenerator {
20 private final String[] FEATURES = {
21 "urn:xmpp:jingle:1",
22 "urn:xmpp:jingle:apps:file-transfer:3",
23 "urn:xmpp:jingle:transports:s5b:1",
24 "urn:xmpp:jingle:transports:ibb:1",
25 "http://jabber.org/protocol/muc",
26 "jabber:x:conference",
27 "http://jabber.org/protocol/caps",
28 "http://jabber.org/protocol/disco#info",
29 "urn:xmpp:avatar:metadata+notify",
30 "http://jabber.org/protocol/nick+notify",
31 "urn:xmpp:ping",
32 "jabber:iq:version",
33 "http://jabber.org/protocol/chatstates",
34 AxolotlService.PEP_DEVICE_LIST+"+notify"};
35 private final String[] MESSAGE_CONFIRMATION_FEATURES = {
36 "urn:xmpp:chat-markers:0",
37 "urn:xmpp:receipts"
38 };
39 private String mVersion = null;
40 protected final String IDENTITY_NAME = "Conversations";
41 protected final String IDENTITY_TYPE = "phone";
42
43 private static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US);
44
45 protected XmppConnectionService mXmppConnectionService;
46
47 protected AbstractGenerator(XmppConnectionService service) {
48 this.mXmppConnectionService = service;
49 }
50
51 protected String getIdentityVersion() {
52 if (mVersion == null) {
53 this.mVersion = PhoneHelper.getVersionName(mXmppConnectionService);
54 }
55 return this.mVersion;
56 }
57
58 public String getIdentityName() {
59 return IDENTITY_NAME + " " + getIdentityVersion();
60 }
61
62 public String getCapHash() {
63 StringBuilder s = new StringBuilder();
64 s.append("client/" + IDENTITY_TYPE + "//" + getIdentityName() + "<");
65 MessageDigest md;
66 try {
67 md = MessageDigest.getInstance("SHA-1");
68 } catch (NoSuchAlgorithmException e) {
69 return null;
70 }
71
72 for (String feature : getFeatures()) {
73 s.append(feature + "<");
74 }
75 byte[] sha1 = md.digest(s.toString().getBytes());
76 return new String(Base64.encode(sha1, Base64.DEFAULT)).trim();
77 }
78
79 public static String getTimestamp(long time) {
80 DATE_FORMAT.setTimeZone(TimeZone.getTimeZone("UTC"));
81 return DATE_FORMAT.format(time);
82 }
83
84 public List<String> getFeatures() {
85 ArrayList<String> features = new ArrayList<>();
86 features.addAll(Arrays.asList(FEATURES));
87 if (mXmppConnectionService.confirmMessages()) {
88 features.addAll(Arrays.asList(MESSAGE_CONFIRMATION_FEATURES));
89 }
90 Collections.sort(features);
91 return features;
92 }
93}