snow.utils.MDigest.java Source code

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Here is the source code for snow.utils.MDigest.java

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/*
 * Copyright (c) 2013 Public domain
 * http://animotron.org/snow
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package snow.utils;

import org.apache.commons.codec.binary.Base64;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import javax.xml.bind.DatatypeConverter;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * @author <a href="mailto:shabanovd@gmail.com">Dmitriy Shabanov</a>
 * 
 */
public class MDigest {

    public static String md(String algorithm, byte[] bytes) throws NoSuchAlgorithmException {
        MessageDigest md = MessageDigest.getInstance(algorithm);

        md.update(bytes);

        return DatatypeConverter.printHexBinary(md.digest());
    }

    public static String skein512(CharSequence chars) {

        byte[] digest = new byte[512];

        byte[] msg = new byte[chars.length()];
        for (int i = 0; i < chars.length(); i++) {
            msg[i] = (byte) chars.charAt(i);
        }

        Skein512.hash(msg, digest);

        return Base64.encodeBase64String(digest);
    }

    public static String HmacSHA256(String secret, String data) {
        try {
            SecretKeySpec secret_key = new SecretKeySpec(secret.getBytes("UTF-8"), "HmacSHA256");

            Mac mac = Mac.getInstance("HmacSHA256");
            mac.init(secret_key);

            return Base64.encodeBase64String(mac.doFinal(data.getBytes("UTF-8")));

            // XXX: log?
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return "";
    }

}