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| 1 | /* | ||
| 2 | * Copyright (c) 2003, 2009, 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 com.sun.crypto.provider; | ||
| 27 | |||
| 28 | import java.security.*; | ||
| 29 | import java.security.spec.*; | ||
| 30 | |||
| 31 | import javax.crypto.*; | ||
| 32 | import javax.crypto.spec.RC2ParameterSpec; | ||
| 33 | |||
| 34 | /** | ||
| 35 | * JCE CipherSpi for the RC2(tm) algorithm as described in RFC 2268. | ||
| 36 | * The real code is in CipherCore and RC2Crypt. | ||
| 37 | * | ||
| 38 | * @since 1.5 | ||
| 39 | * @author Andreas Sterbenz | ||
| 40 | */ | ||
| 41 | public final class RC2Cipher extends CipherSpi { | ||
| 42 | |||
| 43 | // internal CipherCore & RC2Crypt objects which do the real work. | ||
| 44 | private final CipherCore core; | ||
| 45 | private final RC2Crypt embeddedCipher; | ||
| 46 | |||
| 47 | public RC2Cipher() { | ||
| 48 | embeddedCipher = new RC2Crypt(); | ||
| 49 | core = new CipherCore(embeddedCipher, 8); | ||
| 50 | } | ||
| 51 | |||
| 52 | protected void engineSetMode(String mode) | ||
| 53 | throws NoSuchAlgorithmException { | ||
| 54 | core.setMode(mode); | ||
| 55 | } | ||
| 56 | |||
| 57 | protected void engineSetPadding(String paddingScheme) | ||
| 58 | throws NoSuchPaddingException { | ||
| 59 | core.setPadding(paddingScheme); | ||
| 60 | } | ||
| 61 | |||
| 62 | protected int engineGetBlockSize() { | ||
| 63 | return 8; | ||
| 64 | } | ||
| 65 | |||
| 66 | protected int engineGetOutputSize(int inputLen) { | ||
| 67 | return core.getOutputSize(inputLen); | ||
| 68 | } | ||
| 69 | |||
| 70 | protected byte[] engineGetIV() { | ||
| 71 | return core.getIV(); | ||
| 72 | } | ||
| 73 | |||
| 74 | protected AlgorithmParameters engineGetParameters() { | ||
| 75 | return core.getParameters("RC2"); | ||
| 76 | } | ||
| 77 | |||
| 78 | protected void engineInit(int opmode, Key key, SecureRandom random) | ||
| 79 | throws InvalidKeyException { | ||
| 80 | embeddedCipher.initEffectiveKeyBits(0); | ||
| 81 | core.init(opmode, key, random); | ||
| 82 | } | ||
| 83 | |||
| 84 | protected void engineInit(int opmode, Key key, | ||
| 85 | AlgorithmParameterSpec params, SecureRandom random) | ||
| 86 | throws InvalidKeyException, InvalidAlgorithmParameterException { | ||
| 87 | if (params != null && params instanceof RC2ParameterSpec) { | ||
| 88 | embeddedCipher.initEffectiveKeyBits | ||
| 89 | (((RC2ParameterSpec)params).getEffectiveKeyBits()); | ||
| 90 | } else { | ||
| 91 | embeddedCipher.initEffectiveKeyBits(0); | ||
| 92 | } | ||
| 93 | core.init(opmode, key, params, random); | ||
| 94 | } | ||
| 95 | |||
| 96 | protected void engineInit(int opmode, Key key, | ||
| 97 | AlgorithmParameters params, SecureRandom random) | ||
| 98 | throws InvalidKeyException, InvalidAlgorithmParameterException { | ||
| 99 | if (params != null && params.getAlgorithm().equals("RC2")) { | ||
| 100 | try { | ||
| 101 | RC2ParameterSpec rc2Params = (RC2ParameterSpec) | ||
| 102 | params.getParameterSpec(RC2ParameterSpec.class); | ||
| 103 | engineInit(opmode, key, rc2Params, random); | ||
| 104 | } catch (InvalidParameterSpecException ipse) { | ||
| 105 | throw new InvalidAlgorithmParameterException | ||
| 106 | ("Wrong parameter type: RC2 expected"); | ||
| 107 | } | ||
| 108 | } else { | ||
| 109 | embeddedCipher.initEffectiveKeyBits(0); | ||
| 110 | core.init(opmode, key, params, random); | ||
| 111 | } | ||
| 112 | } | ||
| 113 | |||
| 114 | protected byte[] engineUpdate(byte[] in, int inOfs, int inLen) { | ||
| 115 | return core.update(in, inOfs, inLen); | ||
| 116 | } | ||
| 117 | |||
| 118 | protected int engineUpdate(byte[] in, int inOfs, int inLen, | ||
| 119 | byte[] out, int outOfs) throws ShortBufferException { | ||
| 120 | return core.update(in, inOfs, inLen, out, outOfs); | ||
| 121 | } | ||
| 122 | |||
| 123 | protected byte[] engineDoFinal(byte[] in, int inOfs, int inLen) | ||
| 124 | throws IllegalBlockSizeException, BadPaddingException { | ||
| 125 | return core.doFinal(in, inOfs, inLen); | ||
| 126 | } | ||
| 127 | |||
| 128 | protected int engineDoFinal(byte[] in, int inOfs, int inLen, | ||
| 129 | byte[] out, int outOfs) throws IllegalBlockSizeException, | ||
| 130 | ShortBufferException, BadPaddingException { | ||
| 131 | return core.doFinal(in, inOfs, inLen, out, outOfs); | ||
| 132 | } | ||
| 133 | |||
| 134 | protected int engineGetKeySize(Key key) throws InvalidKeyException { | ||
| 135 | byte[] keyBytes = CipherCore.getKeyBytes(key); | ||
| 136 | RC2Crypt.checkKey(key.getAlgorithm(), keyBytes.length); | ||
| 137 | return keyBytes.length << 3; | ||
| 138 | } | ||
| 139 | |||
| 140 | protected byte[] engineWrap(Key key) | ||
| 141 | throws IllegalBlockSizeException, InvalidKeyException { | ||
| 142 | return core.wrap(key); | ||
| 143 | } | ||
| 144 | |||
| 145 | protected Key engineUnwrap(byte[] wrappedKey, String wrappedKeyAlgorithm, | ||
| 146 | int wrappedKeyType) throws InvalidKeyException, | ||
| 147 | NoSuchAlgorithmException { | ||
| 148 | return core.unwrap(wrappedKey, wrappedKeyAlgorithm, wrappedKeyType); | ||
| 149 | } | ||
| 150 | |||
| 151 | } | ||