package eu.siacs.conversations.generator; import android.util.Base64; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.Arrays; import java.util.Collections; import java.util.List; import eu.siacs.conversations.services.XmppConnectionService; public abstract class AbstractGenerator { public final String[] FEATURES = {"urn:xmpp:jingle:1", "urn:xmpp:jingle:apps:file-transfer:3", "urn:xmpp:jingle:transports:s5b:1", "urn:xmpp:jingle:transports:ibb:1", "urn:xmpp:receipts", "urn:xmpp:chat-markers:0", "http://jabber.org/protocol/muc", "jabber:x:conference", "http://jabber.org/protocol/caps", "http://jabber.org/protocol/disco#info", "urn:xmpp:avatar:metadata+notify", "urn:xmpp:ping"}; public final String IDENTITY_NAME = "Conversations 0.8.3"; public final String IDENTITY_TYPE = "phone"; protected XmppConnectionService mXmppConnectionService; protected AbstractGenerator(XmppConnectionService service) { this.mXmppConnectionService = service; } public String getCapHash() { StringBuilder s = new StringBuilder(); s.append("client/" + IDENTITY_TYPE + "//" + IDENTITY_NAME + "<"); MessageDigest md = null; try { md = MessageDigest.getInstance("SHA-1"); } catch (NoSuchAlgorithmException e) { return null; } List features = Arrays.asList(FEATURES); Collections.sort(features); for (String feature : features) { s.append(feature + "<"); } byte[] sha1 = md.digest(s.toString().getBytes()); return new String(Base64.encode(sha1, Base64.DEFAULT)).trim(); } }