br.com.objectos.comuns.base.Hashs Maven / Gradle / Ivy
/*
* Copyright 2011 Objectos, Fábrica de Software LTDA.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package br.com.objectos.comuns.base;
import java.math.BigInteger;
import java.security.MessageDigest;
/**
* @author endo
*
* @version $Id$
*/
public class Hashs {
public static String withMD5(String input) {
try {
MessageDigest digest = MessageDigest.getInstance("MD5");
digest.update(input.getBytes("UTF-8"), 0, input.length());
byte[] bytes = digest.digest();
String md5sum = new BigInteger(1, bytes).toString(16);
return appendZeroIfNecessaryTo(md5sum);
} catch (Exception e) {
throw new HashException(e);
}
}
private static String appendZeroIfNecessaryTo(String checksum) {
int length = checksum.length();
if (length % 2 != 0) {
return "0" + checksum;
} else {
return checksum;
}
}
}