brainleg.app.util.EncryptionUtil.java Source code

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Here is the source code for brainleg.app.util.EncryptionUtil.java

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/*
 * Copyright 2011 Roman Stepanenko
 *
 * 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 brainleg.app.util;

import org.apache.commons.codec.binary.Hex;
import java.security.NoSuchAlgorithmException;
import java.security.MessageDigest;

/**
 * @author Roman Stepanenko
 */
public class EncryptionUtil {
    public static final String MD5 = "MD5";

    public static String generateMD5Checksum(String plainText) {
        if (plainText == null) {
            return null;
        }
        byte[] encryptedBytes = generateDigest(MD5, plainText.getBytes());
        return new String(Hex.encodeHex(encryptedBytes));
    }

    private static byte[] generateDigest(String algorithm, byte[] data) {
        if (data == null) {
            return null;
        }

        try {
            MessageDigest messageDigest = MessageDigest.getInstance(algorithm);
            byte[] digest = messageDigest.digest(data);
            return digest;
        } catch (NoSuchAlgorithmException e) {
            throw new IllegalArgumentException(e);
        }
    }

    public static void main(String[] args) {
        System.out.println(generateMD5Checksum("234some test string"));
    }
}