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/*
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* This program is a part of the IoTa project.
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*
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* Copyright © 2008-2012 Université de Caen Basse-Normandie, GREYC
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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 General Public License for more details.
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* <http://www.gnu.org/licenses/>
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*
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* See AUTHORS for a list of contributors.
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*/
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package fr.unicaen.iota.simulator.server.util;
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import java.io.UnsupportedEncodingException;
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import java.math.BigInteger;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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/**
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*
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*/
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public class AccessControlModule {
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private static final Log log = LogFactory.getLog(AccessControlModule.class);
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private AccessControlModule() {
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}
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public static boolean isAuthenticated(String publicKey, String message) {
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try {
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byte[] digest = MD5.digest((publicKey + Configuration.MDP).getBytes("UTF-8"));
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return new BigInteger(1, digest).toString(16).equals(message);
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} catch (UnsupportedEncodingException ex) {
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log.fatal(null, ex);
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}
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return false;
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}
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private static MessageDigest MD5;
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static {
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try {
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MD5 = MessageDigest.getInstance("MD5");
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} catch (NoSuchAlgorithmException e) {
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log.fatal("MD5 not avalaible", e);
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}
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}
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}
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