1package eu.siacs.conversations.generator;
 2
 3import java.security.MessageDigest;
 4import java.security.NoSuchAlgorithmException;
 5import java.util.Arrays;
 6import java.util.Collections;
 7import java.util.List;
 8
 9import android.util.Base64;
10
11public abstract class AbstractGenerator {
12	public final String[] FEATURES = { "urn:xmpp:jingle:1",
13			"urn:xmpp:jingle:apps:file-transfer:3",
14			"urn:xmpp:jingle:transports:s5b:1",
15			"urn:xmpp:jingle:transports:ibb:1",
16			"urn:xmpp:receipts",
17			"urn:xmpp:chat-markers:0",
18			"http://jabber.org/protocol/muc",
19			"jabber:x:conference",
20			"http://jabber.org/protocol/caps",
21			"http://jabber.org/protocol/disco#info",
22			"urn:xmpp:avatar:metadata+notify"};
23	public final String IDENTITY_NAME = "Conversations 0.5";
24	public final String IDENTITY_TYPE = "phone";
25	/*public final String[] FEATURES = { "http://jabber.org/protocol/muc","http://jabber.org/protocol/disco#info", "http://jabber.org/protocol/disco#items", "http://jabber.org/protocol/caps" };
26	
27	public final String IDENTITY_NAME = "Exodus 0.9.1";
28	public final String IDENTITY_TYPE = "pc";*/
29	
30	
31	
32	
33	public String getCapHash() {
34		StringBuilder s = new StringBuilder();
35		s.append("client/"+IDENTITY_TYPE+"//"+IDENTITY_NAME+"<");
36		MessageDigest md = null;
37	    try {
38	        md = MessageDigest.getInstance("SHA-1");
39	    }
40	    catch(NoSuchAlgorithmException e) {
41	        return null;
42	    }
43	    List<String> features = Arrays.asList(FEATURES);
44		Collections.sort(features);
45		for(String feature : features) {
46			s.append(feature+"<");
47	    }
48		byte[] sha1 = md.digest(s.toString().getBytes());
49	    return new String(Base64.encode(sha1, Base64.DEFAULT)).trim();
50	}
51}