/*

* Copyright 2014-2023 The GmSSL Project. All Rights Reserved.

*

* Licensed under the Apache License, Version 2.0 (the License); you may

* not use this file except in compliance with the License.

*

* http://www.apache.org/licenses/LICENSE-2.0

*/

package org.gmssl;

import org.junit.Assert;

import org.junit.Test;

/**

* @author yongfeili

* @email 290836576@qq.com

* @date 2023/10/20

* @description Sm3Pbkdf2 unit test

*/

public class Sm3Pbkdf2Test {

/**

* PBKDF2 (Password-Based Key Derivation Function 2) is a cryptographic algorithm used to derive a key from a password.

* It employs a pseudorandom function to generate the key, and the length of the derived key can be arbitrarily chosen. However, PBKDF2 allows for multiple iterations of the computation to further enhance security.

* By incorporating a salt value (random data) along with the plaintext password, PBKDF2 generates a salted key, which greatly improves resistance against attacks like rainbow table attacks.

*/

@Test

public void deriveKeyTest(){

Sm3Pbkdf2 kdf = new Sm3Pbkdf2();

Random rng = new Random();

byte[] salt = rng.randBytes(Sm3Pbkdf2.DEFAULT_SALT_SIZE);

String pass = "P@ssw0rd";

byte[] key = kdf.deriveKey(pass, salt, Sm3Pbkdf2.MIN_ITER * 2, 16);

String keyHexStr = HexUtil.byteToHex(key);

//System.out.println(keyHexStr);

Assert.assertNotNull("data is empty exception!",keyHexStr);

}

}