File BcPaddedSymmetricCipher.java
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Classes
| Class | Line # | Actions | |||||
|---|---|---|---|---|---|---|---|
| BcPaddedSymmetricCipher | 32 | 7 | 0% | 6 | 7 |
Contributing tests
This file is covered by 22 tests.
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| 1 | /* | |
| 2 | * See the NOTICE file distributed with this work for additional | |
| 3 | * information regarding copyright ownership. | |
| 4 | * | |
| 5 | * This is free software; you can redistribute it and/or modify it | |
| 6 | * under the terms of the GNU Lesser General Public License as | |
| 7 | * published by the Free Software Foundation; either version 2.1 of | |
| 8 | * the License, or (at your option) any later version. | |
| 9 | * | |
| 10 | * This software is distributed in the hope that it will be useful, | |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | * Lesser General Public License for more details. | |
| 14 | * | |
| 15 | * You should have received a copy of the GNU Lesser General Public | |
| 16 | * License along with this software; if not, write to the Free | |
| 17 | * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
| 18 | * 02110-1301 USA, or see the FSF site: http://www.fsf.org. | |
| 19 | */ | |
| 20 | package org.xwiki.crypto.cipher.internal.symmetric; | |
| 21 | ||
| 22 | import org.bouncycastle.crypto.BlockCipher; | |
| 23 | import org.bouncycastle.crypto.CipherParameters; | |
| 24 | import org.bouncycastle.crypto.paddings.BlockCipherPadding; | |
| 25 | import org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher; | |
| 26 | ||
| 27 | /** | |
| 28 | * Base class for Bouncy Castle padded symmetric ciphers. | |
| 29 | * | |
| 30 | * @version $Id: d521dd634cf3472cd99fceefdc426fa0dcb20400 $ | |
| 31 | */ | |
| 32 | public class BcPaddedSymmetricCipher extends BcSymmetricCipher | |
| 33 | { | |
| 34 | private static final String SEPARATOR = "/"; | |
| 35 | ||
| 36 | private static final String PADDING = "Padding"; | |
| 37 | ||
| 38 | private static final String PKCS5_PADDING = "PKCS5" + PADDING; | |
| 39 | ||
| 40 | private static final String PKCS7_PADDING = "PKCS7" + PADDING; | |
| 41 | ||
| 42 | private String paddingName; | |
| 43 | ||
| 44 | /** | |
| 45 | * Generic Bouncy Castle based block cipher with padding. | |
| 46 | * | |
| 47 | * @param cipher the block cipher to encapsulate. | |
| 48 | * @param forEncryption true if the block cipher is setup for encryption. | |
| 49 | * @param parameters parameters to initialize the cipher. | |
| 50 | */ | |
| 51 | 43 |  public BcPaddedSymmetricCipher(BlockCipher cipher, boolean forEncryption, CipherParameters parameters) |
| 52 | { | |
| 53 | 43 | super(new PaddedBufferedBlockCipher(cipher), forEncryption, parameters); |
| 54 | 43 | this.paddingName = (getOutputBlockSize() <= 8) ? PKCS5_PADDING : PKCS7_PADDING; |
| 55 | } | |
| 56 | ||
| 57 | /** | |
| 58 | * Generic Bouncy Castle based block cipher with padding. | |
| 59 | * | |
| 60 | * @param cipher the block cipher to encapsulate. | |
| 61 | * @param forEncryption true if the block cipher is setup for encryption. | |
| 62 | * @param padding the padding to apply. | |
| 63 | * @param parameters parameters to initialize the cipher. | |
| 64 | */ | |
| 65 | 0 | public BcPaddedSymmetricCipher(BlockCipher cipher, boolean forEncryption, CipherParameters parameters, |
| 66 | BlockCipherPadding padding) | |
| 67 | { | |
| 68 | 0 | super(new PaddedBufferedBlockCipher(cipher, padding), forEncryption, parameters); |
| 69 | 0 | this.paddingName = padding.getPaddingName() + PADDING; |
| 70 | 0 | if (PKCS7_PADDING.equals(this.paddingName) && getOutputBlockSize() <= 8) { |
| 71 | 0 | this.paddingName = PKCS5_PADDING; |
| 72 | } | |
| 73 | } | |
| 74 | ||
| 75 | 14 | @Override |
| 76 | public String getAlgorithmName() | |
| 77 | { | |
| 78 | 14 | return this.cipher.getUnderlyingCipher().getAlgorithmName() + SEPARATOR + this.paddingName; |
| 79 | } | |
| 80 | } |