/*
 * Copyright 2010-2011 the original author or authors.
 *
 * 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 c;pWARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package griffon.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * @author Andres Almiray
 */
public final class MD5 {
    public static String encode(String str) throws IllegalArgumentException {
        if (str == null || str.length() == 0) {
            throw new IllegalArgumentException("String to encode cannot be null or have zero length");
        }

        return encode(str.getBytes());
    }

    public static String encode(byte[] bytes) {
        if (bytes == null || bytes.length == 0) {
            throw new IllegalArgumentException("Byte array to encode cannot be null or have zero length");
        }

        MessageDigest digester = createDigester();
        digester.update(bytes);
        byte[] hash = digester.digest();
        StringBuffer hexString = new StringBuffer();
        for (int i = 0; i < hash.length; i++) {
            if ((0xff & hash[i]) < 0x10) {
                hexString.append("0" + Integer.toHexString((0xFF & hash[i])));
            } else {
                hexString.append(Integer.toHexString(0xFF & hash[i]));
            }
        }
        return hexString.toString();
    }

    private static MessageDigest createDigester() {
        try {
            return MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e) {
            throw new IllegalArgumentException(e);
        }
    }
}
Add encoding utility required to publish artifacts