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ZucExample.java

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/*

* 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

*/

import org.gmssl.Zuc;

import org.gmssl.Random;

public class ZucExample {

public static void main(String[] args) {

Random rng = new Random();

byte[] key = rng.randBytes(Zuc.KEY_SIZE);

byte[] iv = rng.randBytes(Zuc.IV_SIZE);

byte[] ciphertext = new byte[32];

byte[] plaintext = new byte[32];

int cipherlen;

int plainlen;

int i;

Zuc zuc = new Zuc();

zuc.init(key, iv);

cipherlen = zuc.update("abc".getBytes(), 0, 3, ciphertext, 0);

cipherlen += zuc.doFinal(ciphertext, cipherlen);

System.out.print("ciphertext : ");

for (i = 0; i < cipherlen; i++) {

System.out.printf("%02x", ciphertext[i]);

}

System.out.print("\n");

zuc.init(key, iv);

plainlen = zuc.update(ciphertext, 0, cipherlen, plaintext, 0);

plainlen += zuc.doFinal(plaintext, plainlen);

System.out.print("plaintext : ");

for (i = 0; i < plainlen; i++) {

System.out.printf("%02x", plaintext[i]);

}

System.out.print("\n");

}

}