Hash a password using PBKDF2 with hman and sha1 algorithm.

PBKDF2PasswordHasher.java

import com.sun.org.apache.xml.internal.security.utils.Base64;

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

/**
 * Hash a password using PBKDF2 with hman and sha1 algorithm.
 */
public class PBKDF2PasswordHasher {

    public static final String ALGORITHM = "PBKDF2WithHmacSHA1";

    public static final int SALT_BYTES = 16;
    public static final int KEY_BITS = 128;
    public static final int ITERATIONS = 65536;

    public static void main(String[] args) throws NoSuchAlgorithmException, InvalidKeySpecException {

        String password = "Password";

        System.out.printf("This is the password: %s%n", password);

        // Generate random salt
        SecureRandom random = new SecureRandom();
        byte[] salt = new byte[SALT_BYTES];
        random.nextBytes(salt);

        System.out.printf("This is the salt: %s%n", Base64.encode(salt));

        // Hash the password
        PBEKeySpec spec = new PBEKeySpec(password.toCharArray(), salt, ITERATIONS, KEY_BITS);
        SecretKeyFactory factory = SecretKeyFactory.getInstance(ALGORITHM);
        byte[] hash = factory.generateSecret(spec).getEncoded();

        // Using Base64 to properly encode hash bytes into a string of characters
        System.out.printf("This is the hash: %s%n", Base64.encode(hash));
    }
}