Showing the changes to java/pkg/javax/crypto/NullCipherSpi.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package javax.crypto; | |
| 27 | + | |
| 28 | +import java.security.*; | |
| 29 | +import java.security.spec.*; | |
| 30 | + | |
| 31 | +/** | |
| 32 | + * This class provides a delegate for the identity cipher - one that does not | |
| 33 | + * tranform the plaintext. | |
| 34 | + * | |
| 35 | + * @author Li Gong | |
| 36 | + * @see Nullcipher | |
| 37 | + * | |
| 38 | + * @since 1.4 | |
| 39 | + */ | |
| 40 | + | |
| 41 | +final class NullCipherSpi extends CipherSpi { | |
| 42 | + | |
| 43 | + /* | |
| 44 | + * Do not let anybody instantiate this directly (protected). | |
| 45 | + */ | |
| 46 | + protected NullCipherSpi() {} | |
| 47 | + | |
| 48 | + public void engineSetMode(String mode) {} | |
| 49 | + | |
| 50 | + public void engineSetPadding(String padding) {} | |
| 51 | + | |
| 52 | + protected int engineGetBlockSize() { | |
| 53 | + return 1; | |
| 54 | + } | |
| 55 | + | |
| 56 | + protected int engineGetOutputSize(int inputLen) { | |
| 57 | + return inputLen; | |
| 58 | + } | |
| 59 | + | |
| 60 | + protected byte[] engineGetIV() { | |
| 61 | + byte[] x = new byte[8]; | |
| 62 | + return x; | |
| 63 | + } | |
| 64 | + | |
| 65 | + protected AlgorithmParameters engineGetParameters() { | |
| 66 | + return null; | |
| 67 | + } | |
| 68 | + | |
| 69 | + protected void engineInit(int mode, Key key, SecureRandom random) {} | |
| 70 | + | |
| 71 | + protected void engineInit(int mode, Key key, | |
| 72 | + AlgorithmParameterSpec params, | |
| 73 | + SecureRandom random) {} | |
| 74 | + | |
| 75 | + protected void engineInit(int mode, Key key, | |
| 76 | + AlgorithmParameters params, | |
| 77 | + SecureRandom random) {} | |
| 78 | + | |
| 79 | + protected byte[] engineUpdate(byte[] input, int inputOffset, | |
| 80 | + int inputLen) { | |
| 81 | + if (input == null) return null; | |
| 82 | + byte[] x = new byte[inputLen]; | |
| 83 | + System.arraycopy(input, inputOffset, x, 0, inputLen); | |
| 84 | + return x; | |
| 85 | + } | |
| 86 | + | |
| 87 | + protected int engineUpdate(byte[] input, int inputOffset, | |
| 88 | + int inputLen, byte[] output, | |
| 89 | + int outputOffset) { | |
| 90 | + if (input == null) return 0; | |
| 91 | + System.arraycopy(input, inputOffset, output, outputOffset, inputLen); | |
| 92 | + return inputLen; | |
| 93 | + } | |
| 94 | + | |
| 95 | + protected byte[] engineDoFinal(byte[] input, int inputOffset, | |
| 96 | + int inputLen) | |
| 97 | + { | |
| 98 | + return engineUpdate(input, inputOffset, inputLen); | |
| 99 | + } | |
| 100 | + | |
| 101 | + protected int engineDoFinal(byte[] input, int inputOffset, | |
| 102 | + int inputLen, byte[] output, | |
| 103 | + int outputOffset) | |
| 104 | + { | |
| 105 | + return engineUpdate(input, inputOffset, inputLen, | |
| 106 | + output, outputOffset); | |
| 107 | + } | |
| 108 | + | |
| 109 | + protected int engineGetKeySize(Key key) | |
| 110 | + { | |
| 111 | + return 0; | |
| 112 | + } | |
| 113 | +} | |