byte[] key;

@Before

public void beforeTest(){

key=new byte[]{49, 50, 51, 52, 53, 54, 55, 56, 56, 55, 54, 53, 52, 51, 50, 49};

}

@Test

public void encryptTest(){

String plaintextStr="1234567887654321";

byte[] plaintext=plaintextStr.getBytes();

byte[] ciphertext=new byte[Sm4.BLOCK_SIZE];

Sm4 sm4enc = new Sm4(key, true);

sm4enc.encrypt(plaintext, 0, ciphertext, 0);

String ciphertextHex = HexUtil.byteToHex(ciphertext);

//System.out.println(ciphertextHex);

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

}

@Test

public void decryptTest(){

String ciphertextHex="4a7dc8fc6f7fb9bac989bbf8a5f194a7";

byte[] ciphertext = HexUtil.hexToByte(ciphertextHex);

byte[] plaintext = new byte[ciphertext.length];

Sm4 sm4dec = new Sm4(key, false);

sm4dec.encrypt(ciphertext, 0, plaintext, 0);

String plaintext1=new String(plaintext);

//System.out.println(plaintext1);

Assert.assertEquals("original value is not equal to the expected value after decryption!","1234567887654321",plaintext1);

}