/*

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * under the terms of the GNU General Public License version 2 only, as

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 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

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 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

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 */

/*

 * @test

 * @bug 8048604

 * @library /lib/testlibrary/

 * @summary This test verifies the assertion "There should be no transformation

 *  on the plaintext/ciphertext in encryption/decryption mechanism" for

 *  feature "NullCipher".

 */

import javax.crypto.BadPaddingException;

import javax.crypto.Cipher;

import javax.crypto.IllegalBlockSizeException;

import javax.crypto.NullCipher;

import javax.crypto.ShortBufferException;

import jdk.testlibrary.RandomFactory;

public class CipherNCFuncTest {

    public static void main(String[] args) throws ShortBufferException,

            IllegalBlockSizeException, BadPaddingException {

        byte[] plainText = new byte[801];

        // Initialization

        RandomFactory.getRandom().nextBytes(plainText);

        Cipher ci = new NullCipher();

        // Encryption

        byte[] cipherText = new byte[ci.getOutputSize(plainText.length)];

        int offset = ci.update(plainText, 0, plainText.length, cipherText, 0);

        ci.doFinal(cipherText, offset);

        // Decryption

        byte[] recoveredText = new byte[ci.getOutputSize(cipherText.length)];

        int len = ci.doFinal(cipherText, 0, cipherText.length, recoveredText);

        // Comparison

        if (len != plainText.length ||

                !TestUtilities.equalsBlock(plainText, cipherText, len) ||

                !TestUtilities.equalsBlock(plainText, recoveredText, len)) {

            throw new RuntimeException(

                "Test failed because plainText not equal to cipherText and revoveredText");

        }

    }

}