Showing the changes to java/pkg/javax/crypto/NullCipherSpi.java (1 of 18352 files). Show all
Unified · Split
| @@ -0,0 +1,113 @@ | |||
| 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 | } | ||