001/** 002 * 003 * Copyright 2017 Paul Schaub 004 * 005 * Licensed under the Apache License, Version 2.0 (the "License"); 006 * you may not use this file except in compliance with the License. 007 * You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.jivesoftware.smackx.omemo.util; 018 019/** 020 * Some constants related to OMEMO. 021 * 022 * @author Paul Schaub 023 */ 024public final class OmemoConstants { 025 026 /** 027 * Omemo related namespace. 028 */ 029 public static final String OMEMO_NAMESPACE_V_AXOLOTL = "eu.siacs.conversations.axolotl"; 030 public static final String OMEMO = "OMEMO"; 031 032 // PubSub Node names 033 public static final String PEP_NODE_DEVICE_LIST = OMEMO_NAMESPACE_V_AXOLOTL + ".devicelist"; 034 public static final String PEP_NODE_BUNDLES = OMEMO_NAMESPACE_V_AXOLOTL + ".bundles"; 035 036 /** 037 * How many preKeys do we want to publish? 038 */ 039 public static final int PRE_KEY_COUNT_PER_BUNDLE = 100; 040 041 /** 042 * Return the node name of the PEP node containing the device bundle of the device with device id deviceId. 043 * 044 * @param deviceId id of the device 045 * @return node name of the devices bundle node 046 */ 047 public static String PEP_NODE_BUNDLE_FROM_DEVICE_ID(int deviceId) { 048 return PEP_NODE_BUNDLES + ":" + deviceId; 049 } 050 051 public static final String BODY_OMEMO_HINT = "I sent you an OMEMO encrypted message but your client doesn't seem to support that. Find more information on https://conversations.im/omemo"; 052 053 /** 054 * Information about the keys used for message encryption. 055 */ 056 public static final class Crypto { 057 public static final String KEYTYPE = "AES"; 058 public static final int KEYLENGTH = 128; 059 public static final String CIPHERMODE = "AES/GCM/NoPadding"; 060 } 061}