1 /*

     2 * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:

    15 *

    16 */

    17 

    18 

    19 package java.security;

    20 

    21 import com.nokia.mj.impl.security.MessageDigestImpl;

    22 import java.security.PrivMessageDigestImpl;

    23 

    24 /**

    25  * Refer JSR-177 Specification for details

    26  */

    27 public abstract class MessageDigest

    28 {

    29 

    30     // MessageDigest implementation

    31     private MessageDigestImpl iDigest;

    32 

    33     // Package private constructor.

    34     MessageDigest(MessageDigestImpl aDigest)

    35     {

    36         iDigest = aDigest;

    37     }

    38 

    39     /**

    40     * Refer JSR-177 Specification for details

    41     */

    42     static public MessageDigest getInstance(String aAlgorithm)

    43     throws NoSuchAlgorithmException

    44     {

    45         MessageDigestImpl digest = new MessageDigestImpl(aAlgorithm);

    46         return new PrivMessageDigestImpl(digest);

    47     }

    48 

    49     /**

    50     * Refer JSR-177 Specification for details

    51     */

    52     public int digest(byte[] aBuf, int aOffset, int aLength)

    53     throws DigestException

    54     {

    55         return iDigest.digest(aBuf, aOffset, aLength);

    56     }

    57 

    58     // Resets the digest for further use.

    59     public void reset()

    60     {

    61         iDigest.reset();

    62     }

    63 

    64     /**

    65     * Refer JSR-177 Specification for details

    66     */

    67     public void update(byte[] aInput, int aOffset, int aLength)

    68     {

    69         iDigest.update(aInput, aOffset, aLength);

    70     }

    71 }