Examples of NullCipher

ch.ethz.ssh2.crypto.cipher.NullCipher
NullCipher. @author Christian Plattner, plattner@inf.ethz.ch @version $Id: NullCipher.java,v 1.3 2005/12/07 10:25:48 cplattne Exp $
com.trilead.ssh2.crypto.cipher.NullCipher
NullCipher. @author Christian Plattner, plattner@inf.ethz.ch @version $Id: NullCipher.java,v 1.3 2005/12/07 10:25:48 cplattne Exp $
gnu.javax.crypto.cipher.NullCipher
javax.crypto.NullCipher
This class provides an identity cipher that does not transform the input data in any way. The encrypted data is identical to the plain text.

Examples of javax.crypto.NullCipher

     * the underlying output stream.
     */
    public void testWrite1() throws Exception {
        byte[] data = new byte[] { -127, -100, -50, -10, -1, 0, 1, 10, 50, 127 };
        TestOutputStream tos = new TestOutputStream();
        CipherOutputStream cos = new CipherOutputStream(tos, new NullCipher());
        for (int i = 0; i < data.length; i++) {
            cos.write(data[i]);
        }
        cos.flush();
        byte[] result = tos.toByteArray();

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Examples of javax.crypto.NullCipher

     * to the underlying output stream.
     */
    public void testWrite2() throws Exception {
        byte[] data = new byte[] { -127, -100, -50, -10, -1, 0, 1, 10, 50, 127 };
        TestOutputStream tos = new TestOutputStream();
        CipherOutputStream cos = new CipherOutputStream(tos, new NullCipher());
        cos.write(data);
        cos.flush();
        byte[] result = tos.toByteArray();
        if (!Arrays.equals(result, data)) {
            fail("CipherOutputStream wrote incorrect data.");

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Examples of javax.crypto.NullCipher

     * write(byte[] b, int off, int len) method testing.
     */
    public void testWrite3() throws Exception {
        byte[] data = new byte[] { -127, -100, -50, -10, -1, 0, 1, 10, 50, 127 };
        TestOutputStream tos = new TestOutputStream();
        CipherOutputStream cos = new CipherOutputStream(tos, new NullCipher());
        for (int i = 0; i < data.length; i++) {
            cos.write(data, i, 1);
        }
        cos.flush();
        byte[] result = tos.toByteArray();

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Examples of javax.crypto.NullCipher

     * @tests write(byte[] b, int off, int len)
     */
    public void testWrite4() throws Exception {
      //Regression for HARMONY-758
      try {
        new CipherOutputStream(new BufferedOutputStream((OutputStream) null), new NullCipher()).write(new byte[] {0}, 1, Integer.MAX_VALUE);
      } catch (IllegalArgumentException e) {
      }
    }

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Examples of javax.crypto.NullCipher

     * @tests write(byte[] b, int off, int len)
     */
    public void testWrite5() throws Exception {
      //Regression for HARMONY-758
        Cipher cf = Cipher.getInstance("DES/CBC/PKCS5Padding");
        NullCipher nc = new NullCipher();
        CipherOutputStream stream1 = new CipherOutputStream(new BufferedOutputStream((OutputStream) null), nc);
        CipherOutputStream stream2 = new CipherOutputStream(stream1, cf);
        CipherOutputStream stream3 = new CipherOutputStream(stream2, nc);
        stream3.write(new byte[] {0}, 0, 0);
       //no exception expected

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Examples of javax.crypto.NullCipher

     * deserialized, the content od deserialized object equals to the
     * content of initial object.
     */
    public void testReadObject() throws Exception {
        String secret = "secret string";
        SealedObject so = new SealedObject(secret, new NullCipher());
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(bos);
        oos.writeObject(so);


        ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(
                bos.toByteArray()));


        SealedObject so_des = (SealedObject) ois.readObject();
        assertEquals("The secret content of deserialized object "
                + "should be equal to the secret content of initial object",
                secret, so_des.getObject(new NullCipher()));
        assertEquals("The value returned by getAlgorithm() method of "
                + "deserialized object should be equal to the value returned "
                + "by getAlgorithm() method of initial object", so
                .getAlgorithm(), so_des.getAlgorithm());
    }

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Examples of javax.crypto.NullCipher

                    + "of null SealedObject.");
        } catch (NullPointerException e) {
        }


        String secret = "secret string";
        Cipher cipher = new NullCipher();
        SealedObject so1 = new SealedObject(secret, cipher);
        SealedObject so2 = new SealedObject(so1);


        assertEquals("The secret content of the object should equals "
                + "to the secret content of initial object.", secret, so2

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Examples of javax.crypto.NullCipher

     * with encryption algorithm and specified parameters can be retrieved by
     * specifying the initialized Cipher object.
     */
    public void testGetObject2() throws Exception {
        try {
            new SealedObject("secret string", new NullCipher())
                    .getObject((Cipher) null);
            fail("NullPointerException should be thrown in the case of "
                    + "null cipher.");
        } catch (NullPointerException e) {
        }

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Examples of javax.crypto.NullCipher

     * object sealed with encryption algorithm can be retrieved by specifying
     * the cryptographic key and provider name.
     */
    public void testGetObject3() throws Exception {
        try {
            new SealedObject("secret string", new NullCipher()).getObject(
                    new SecretKeySpec(new byte[] { 0, 0, 0 }, "algorithm"),
                    null);
            fail("IllegalArgumentException should be thrown in the case of "
                    + "null provider.");
        } catch (IllegalArgumentException e) {
        }


        try {
            new SealedObject("secret string", new NullCipher()).getObject(
                    new SecretKeySpec(new byte[] { 0, 0, 0 }, "algorithm"), "");
            fail("IllegalArgumentException should be thrown in the case of "
                    + "empty provider.");
        } catch (IllegalArgumentException e) {
        }

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Examples of javax.crypto.NullCipher


  private Cipher c;
  
    protected void setUp() throws Exception {
        super.setUp();
        c = new NullCipher();
    }

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