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Axolotl library for Java

There is a newer version: 1.4.3

/**
 * Copyright (C) 2014 Open Whisper Systems
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */
package org.whispersystems.libaxolotl.protocol;

public interface CiphertextMessage {

  public static final int UNSUPPORTED_VERSION = 1;
  public static final int CURRENT_VERSION     = 3;

  public static final int WHISPER_TYPE                = 2;
  public static final int PREKEY_TYPE                 = 3;
  public static final int SENDERKEY_TYPE              = 4;
  public static final int SENDERKEY_DISTRIBUTION_TYPE = 5;

  // This should be the worst case (worse than V2).  So not always accurate, but good enough for padding.
  public static final int ENCRYPTED_MESSAGE_OVERHEAD = 53;

  public byte[] serialize();
  public int getType();

}