fi.ilmoeuro.membertrack.util.Crypto.java Source code

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Here is the source code for fi.ilmoeuro.membertrack.util.Crypto.java

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/*
 * Copyright (C) 2016 Ilmo Euro <ilmo.euro@gmail.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package fi.ilmoeuro.membertrack.util;

import java.nio.charset.StandardCharsets;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Hex;

/**
 *
 * @author Ilmo Euro <ilmo.euro@gmail.com>
 */
public class Crypto {
    public static String hash(String candidate, String salt) {
        try {
            SecretKeyFactory skf = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
            KeySpec ks = new PBEKeySpec(candidate.toCharArray(), salt.getBytes(StandardCharsets.US_ASCII), 1024,
                    128);
            SecretKey sk = skf.generateSecret(ks);
            Key k = new SecretKeySpec(sk.getEncoded(), "AES");
            return Hex.encodeHexString(k.getEncoded());
        } catch (NoSuchAlgorithmException | InvalidKeySpecException ex) {
            throw new RuntimeException("Error while hashing", ex);
        }
    }

    public static String randomSalt() {
        byte[] randomBytes = new byte[32];
        SecureRandom random = new SecureRandom();
        random.nextBytes(randomBytes);
        String salt = Hex.encodeHexString(randomBytes);
        return salt;
    }
}