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 IDENTITY_NAME = "Conversations 0.5";
23	public final String IDENTITY_TYPE = "phone";
24	/*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" };
25	
26	public final String IDENTITY_NAME = "Exodus 0.9.1";
27	public final String IDENTITY_TYPE = "pc";*/
28	
29	
30	
31	
32	public String getCapHash() {
33		StringBuilder s = new StringBuilder();
34		s.append("client/"+IDENTITY_TYPE+"//"+IDENTITY_NAME+"<");
35		MessageDigest md = null;
36	    try {
37	        md = MessageDigest.getInstance("SHA-1");
38	    }
39	    catch(NoSuchAlgorithmException e) {
40	        return null;
41	    }
42	    List<String> features = Arrays.asList(FEATURES);
43		Collections.sort(features);
44		for(String feature : features) {
45			s.append(feature+"<");
46	    }
47		byte[] sha1 = md.digest(s.toString().getBytes());
48	    return new String(Base64.encode(sha1, Base64.DEFAULT));
49	}
50}