Save This Page
Home » openjdk-7 » com.sun.crypto » provider » [javadoc | source]
    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   }

Save This Page
Home » openjdk-7 » com.sun.crypto » provider » [javadoc | source]