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	//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" };
23	
24	//public final String IDENTITY_NAME = "Exodus 0.9.1";
25	//public final String IDENTITY_TYPE = "pc";
26	
27	
28	public final String IDENTITY_NAME = "Conversations 0.5";
29	public final String IDENTITY_TYPE = "phone";
30	
31	public String getCapHash() {
32		StringBuilder s = new StringBuilder();
33		s.append("client/"+IDENTITY_TYPE+"//"+IDENTITY_NAME+"<");
34		MessageDigest md = null;
35	    try {
36	        md = MessageDigest.getInstance("SHA-1");
37	    }
38	    catch(NoSuchAlgorithmException e) {
39	        return null;
40	    }
41	    List<String> features = Arrays.asList(FEATURES);
42		Collections.sort(features);
43		for(String feature : features) {
44			s.append(feature+"<");
45	    }
46		byte[] sha1 = md.digest(s.toString().getBytes());
47	    return new String(Base64.encode(sha1, Base64.DEFAULT));
48	}
49}