94 lines
2.5 KiB
Java
94 lines
2.5 KiB
Java
/*
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* Copyright (C) 2021 Christian Pierre MOMON <christian@momon.org>
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*
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* This file is part of Logar, simple tool to manage http log files.
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*
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* Logar is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* Logar is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Logar. If not, see <http://www.gnu.org/licenses/>.
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*/
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package fr.devinsy.logar.app.anonymizer;
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import org.apache.commons.lang3.RandomStringUtils;
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import org.apache.commons.lang3.StringUtils;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* The Class RandomIpv6Generator.
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*/
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public final class Ipv6Generator
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{
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private static Logger logger = LoggerFactory.getLogger(Ipv6Generator.class);
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/**
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* Instantiates a new random ipv 6 generator.
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*/
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private Ipv6Generator()
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{
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}
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/**
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* Random.
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*
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* @param ip
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* the source
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* @return the string
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*/
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public static String random(final String ip)
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{
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String result;
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if (ip == null)
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{
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result = null;
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}
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else
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{
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StringBuffer buffer = new StringBuffer(ip.length());
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for (int index = 0; index < ip.length(); index++)
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{
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char c = ip.charAt(index);
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if (c == ':')
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{
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buffer.append(c);
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}
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else if (index == 0)
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{
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buffer.append('b');
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}
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else if (index == 1)
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{
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buffer.append('a');
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}
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else if (index == 2)
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{
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buffer.append('d');
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}
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else
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{
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buffer.append(RandomStringUtils.random(1, "0123456789abcdef"));
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}
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}
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result = buffer.toString();
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while (StringUtils.equals(result, ip))
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{
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result = random(ip);
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}
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}
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//
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return result;
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}
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}
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