001/** 002 * 003 * Copyright 2019 Florian Schmaus 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.smack.packet.id; 018 019import org.jivesoftware.smack.util.StringUtils; 020 021public final class RandomStringStanzaIdSource { 022 023 public static class Factory implements StanzaIdSourceFactory { 024 025 private static final int REQUIRED_MIN_LENGTH = 10; 026 027 private final int length; 028 private final boolean verySecure; 029 030 public static final Factory VERY_SECURE = new Factory(10, true); 031 public static final Factory MEDIUM_SECURE = new Factory(10, false); 032 033 public Factory(int length, boolean verySecure) { 034 if (length < REQUIRED_MIN_LENGTH) { 035 throw new IllegalArgumentException( 036 "Insufficient length " + length + ", must be at least " + REQUIRED_MIN_LENGTH); 037 } 038 this.length = length; 039 this.verySecure = verySecure; 040 } 041 042 @Override 043 public StanzaIdSource constructStanzaIdSource() { 044 StanzaIdSource stanzaIdSource; 045 if (verySecure) { 046 stanzaIdSource = () -> StringUtils.randomString(length); 047 } else { 048 stanzaIdSource = () -> StringUtils.insecureRandomString(length); 049 } 050 return stanzaIdSource; 051 } 052 053 } 054}