| /* |
| * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package javax.crypto; |
| |
| import java.security.*; |
| import java.security.spec.*; |
| |
| /** |
| * This class provides a delegate for the identity cipher - one that does not |
| * transform the plain text. |
| * |
| * @author Li Gong |
| * @see NullCipher |
| * |
| * @since 1.4 |
| */ |
| |
| final class NullCipherSpi extends CipherSpi { |
| |
| /* |
| * Do not let anybody instantiate this directly (protected). |
| */ |
| protected NullCipherSpi() {} |
| |
| public void engineSetMode(String mode) {} |
| |
| public void engineSetPadding(String padding) {} |
| |
| protected int engineGetBlockSize() { |
| return 1; |
| } |
| |
| protected int engineGetOutputSize(int inputLen) { |
| return inputLen; |
| } |
| |
| protected byte[] engineGetIV() { |
| byte[] x = new byte[8]; |
| return x; |
| } |
| |
| protected AlgorithmParameters engineGetParameters() { |
| return null; |
| } |
| |
| protected void engineInit(int mode, Key key, SecureRandom random) {} |
| |
| protected void engineInit(int mode, Key key, |
| AlgorithmParameterSpec params, |
| SecureRandom random) {} |
| |
| protected void engineInit(int mode, Key key, |
| AlgorithmParameters params, |
| SecureRandom random) {} |
| |
| protected byte[] engineUpdate(byte[] input, int inputOffset, |
| int inputLen) { |
| if (input == null) return null; |
| byte[] x = new byte[inputLen]; |
| System.arraycopy(input, inputOffset, x, 0, inputLen); |
| return x; |
| } |
| |
| protected int engineUpdate(byte[] input, int inputOffset, |
| int inputLen, byte[] output, |
| int outputOffset) { |
| if (input == null) return 0; |
| System.arraycopy(input, inputOffset, output, outputOffset, inputLen); |
| return inputLen; |
| } |
| |
| protected byte[] engineDoFinal(byte[] input, int inputOffset, |
| int inputLen) |
| { |
| return engineUpdate(input, inputOffset, inputLen); |
| } |
| |
| protected int engineDoFinal(byte[] input, int inputOffset, |
| int inputLen, byte[] output, |
| int outputOffset) |
| { |
| return engineUpdate(input, inputOffset, inputLen, |
| output, outputOffset); |
| } |
| |
| protected int engineGetKeySize(Key key) |
| { |
| return 0; |
| } |
| } |