J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2007 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any 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 | SunJCE.ensureIntegrity(getClass()); |
| 49 | embeddedCipher = new RC2Crypt(); |
| 50 | core = new CipherCore(embeddedCipher, 8); |
| 51 | } |
| 52 | |
| 53 | protected void engineSetMode(String mode) |
| 54 | throws NoSuchAlgorithmException { |
| 55 | core.setMode(mode); |
| 56 | } |
| 57 | |
| 58 | protected void engineSetPadding(String paddingScheme) |
| 59 | throws NoSuchPaddingException { |
| 60 | core.setPadding(paddingScheme); |
| 61 | } |
| 62 | |
| 63 | protected int engineGetBlockSize() { |
| 64 | return 8; |
| 65 | } |
| 66 | |
| 67 | protected int engineGetOutputSize(int inputLen) { |
| 68 | return core.getOutputSize(inputLen); |
| 69 | } |
| 70 | |
| 71 | protected byte[] engineGetIV() { |
| 72 | return core.getIV(); |
| 73 | } |
| 74 | |
| 75 | protected AlgorithmParameters engineGetParameters() { |
| 76 | return core.getParameters("RC2"); |
| 77 | } |
| 78 | |
| 79 | protected void engineInit(int opmode, Key key, SecureRandom random) |
| 80 | throws InvalidKeyException { |
| 81 | embeddedCipher.initEffectiveKeyBits(0); |
| 82 | core.init(opmode, key, random); |
| 83 | } |
| 84 | |
| 85 | protected void engineInit(int opmode, Key key, |
| 86 | AlgorithmParameterSpec params, SecureRandom random) |
| 87 | throws InvalidKeyException, InvalidAlgorithmParameterException { |
| 88 | if (params != null && params instanceof RC2ParameterSpec) { |
| 89 | embeddedCipher.initEffectiveKeyBits |
| 90 | (((RC2ParameterSpec)params).getEffectiveKeyBits()); |
| 91 | } else { |
| 92 | embeddedCipher.initEffectiveKeyBits(0); |
| 93 | } |
| 94 | core.init(opmode, key, params, random); |
| 95 | } |
| 96 | |
| 97 | protected void engineInit(int opmode, Key key, |
| 98 | AlgorithmParameters params, SecureRandom random) |
| 99 | throws InvalidKeyException, InvalidAlgorithmParameterException { |
| 100 | if (params != null && params.getAlgorithm().equals("RC2")) { |
| 101 | try { |
| 102 | RC2ParameterSpec rc2Params = (RC2ParameterSpec) |
| 103 | params.getParameterSpec(RC2ParameterSpec.class); |
| 104 | engineInit(opmode, key, rc2Params, random); |
| 105 | } catch (InvalidParameterSpecException ipse) { |
| 106 | throw new InvalidAlgorithmParameterException |
| 107 | ("Wrong parameter type: RC2 expected"); |
| 108 | } |
| 109 | } else { |
| 110 | embeddedCipher.initEffectiveKeyBits(0); |
| 111 | core.init(opmode, key, params, random); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | protected byte[] engineUpdate(byte[] in, int inOfs, int inLen) { |
| 116 | return core.update(in, inOfs, inLen); |
| 117 | } |
| 118 | |
| 119 | protected int engineUpdate(byte[] in, int inOfs, int inLen, |
| 120 | byte[] out, int outOfs) throws ShortBufferException { |
| 121 | return core.update(in, inOfs, inLen, out, outOfs); |
| 122 | } |
| 123 | |
| 124 | protected byte[] engineDoFinal(byte[] in, int inOfs, int inLen) |
| 125 | throws IllegalBlockSizeException, BadPaddingException { |
| 126 | return core.doFinal(in, inOfs, inLen); |
| 127 | } |
| 128 | |
| 129 | protected int engineDoFinal(byte[] in, int inOfs, int inLen, |
| 130 | byte[] out, int outOfs) throws IllegalBlockSizeException, |
| 131 | ShortBufferException, BadPaddingException { |
| 132 | return core.doFinal(in, inOfs, inLen, out, outOfs); |
| 133 | } |
| 134 | |
| 135 | protected int engineGetKeySize(Key key) throws InvalidKeyException { |
| 136 | byte[] keyBytes = CipherCore.getKeyBytes(key); |
| 137 | RC2Crypt.checkKey(key.getAlgorithm(), keyBytes.length); |
| 138 | return keyBytes.length << 3; |
| 139 | } |
| 140 | |
| 141 | protected byte[] engineWrap(Key key) |
| 142 | throws IllegalBlockSizeException, InvalidKeyException { |
| 143 | return core.wrap(key); |
| 144 | } |
| 145 | |
| 146 | protected Key engineUnwrap(byte[] wrappedKey, String wrappedKeyAlgorithm, |
| 147 | int wrappedKeyType) throws InvalidKeyException, |
| 148 | NoSuchAlgorithmException { |
| 149 | return core.unwrap(wrappedKey, wrappedKeyAlgorithm, wrappedKeyType); |
| 150 | } |
| 151 | |
| 152 | } |