/*

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

* All rights reserved.

* This component and the accompanying materials are made available

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

* which accompanies this distribution, and is available

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

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

package java.security;

import com.nokia.mj.impl.security.SignatureImpl;

import java.security.PrivSignatureImpl;

/**

 * Refer JSR-177 Specification for details

 */

public abstract class Signature

{

    /**

     * Signature implementation

     */

    private SignatureImpl iSignature;

    /**

     * Package private constructor.

     */

    Signature(SignatureImpl aSignature)

    {

        iSignature = aSignature;

    }

    /**

    * Refer JSR-177 Specification for details

    */

    static public Signature getInstance(String aAlgorithm)

    throws NoSuchAlgorithmException

    {

        SignatureImpl signatureImpl = new SignatureImpl(aAlgorithm);

        return new PrivSignatureImpl(signatureImpl);

    }

    /**

    * Refer JSR-177 Specification for details

    */

    public final void initVerify(PublicKey aPublicKey)

    throws InvalidKeyException

    {

        iSignature.initVerifyImpl(aPublicKey);

    }

    /**

    * Refer JSR-177 Specification for details

    */

    public final void update(byte[] aData, int aOffset, int aLength)

    throws SignatureException

    {

        iSignature.updateImpl(aData, aOffset, aLength);

    }

    /**

    * Refer JSR-177 Specification for details

    */

    public final boolean verify(byte[] aSignature) throws SignatureException

    {

        return iSignature.verifyImpl(aSignature);

    }

}