1 /*

     2  * Copyright (c) 2002, 2011, 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.io.*;

    29 import java.security.AlgorithmParametersSpi;

    30 import java.security.spec.AlgorithmParameterSpec;

    31 import java.security.spec.InvalidParameterSpecException;

    32 

    33 /**

    34  * This class implements the parameter (IV) used with the AES algorithm

    35  * in feedback-mode. IV is defined in the standards as follows:

    36  *

    37  * <pre>

    38  * IV ::= OCTET STRING  -- 16 octets

    39  * </pre>

    40  *

    41  * @author Valerie Peng

    42  *

    43  */

    44 public final class AESParameters extends AlgorithmParametersSpi {

    45 

    46     private BlockCipherParamsCore core;

    47 

    48     public AESParameters() {

    49         core = new BlockCipherParamsCore(AESConstants.AES_BLOCK_SIZE);

    50     }

    51 

    52     protected void engineInit(AlgorithmParameterSpec paramSpec)

    53         throws InvalidParameterSpecException {

    54         core.init(paramSpec);

    55     }

    56 

    57     protected void engineInit(byte[] encoded)

    58         throws IOException {

    59         core.init(encoded);

    60     }

    61 

    62     protected void engineInit(byte[] encoded, String decodingMethod)

    63         throws IOException {

    64         core.init(encoded, decodingMethod);

    65     }

    66 

    67     protected <T extends AlgorithmParameterSpec>

    68         T engineGetParameterSpec(Class<T> paramSpec)

    69         throws InvalidParameterSpecException {

    70         if (AlgorithmParameterSpec.class.isAssignableFrom(paramSpec)) {

    71             return core.getParameterSpec(paramSpec);

    72         } else {

    73             throw new InvalidParameterSpecException

    74                 ("Inappropriate parameter Specification");

    75         }

    76     }

    77 

    78     protected byte[] engineGetEncoded() throws IOException {

    79         return core.getEncoded();

    80     }

    81 

    82     protected byte[] engineGetEncoded(String encodingMethod)

    83         throws IOException {

    84         return core.getEncoded();

    85     }

    86 

    87     protected String engineToString() {

    88         return core.toString();

    89     }

    90 }