Password Salt Utils

PasswordUtils.java

package net.csdra.meishanshuhuayuan;

import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.spec.InvalidKeySpecException;

/**
 * Created by Didy on 2015-12-22.
 */
public class PasswordUtils {

    public static byte[] generateSalt() {
        SecureRandom random = new SecureRandom();
        byte salt[] = new byte[20];
        random.nextBytes(salt);
        return salt;
    }

    public static byte[] encode(byte[] salt, String input) {
        try {
            PBEKeySpec pbeKeySpec = new PBEKeySpec(input.toCharArray(), salt, 1024, 128);
            SecretKeyFactory skf = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
            return skf.generateSecret(pbeKeySpec).getEncoded();
        } catch (NoSuchAlgorithmException | InvalidKeySpecException e) {
            e.printStackTrace();
            throw new RuntimeException(e);
        }
    }
}