/*

* 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:  Implementation of STSTransformation

 *

*/

#include "ststransformation.h"

#include "javajniutils.h"

#include "stsconstants.h"

#include "logger.h"

namespace java

{

namespace satsa

{

//Static function used to create the transformation object

STSTransformation* STSTransformation::Create(JNIEnv* aJni,

        jstring aTransformation, int* errCode)

{

    // Create the object

    STSTransformation* self = new STSTransformation();

    if (self != NULL)

    {

        // to parse and decode the transformation string

        *errCode = self->Construct(aJni, aTransformation);

        if (*errCode != 0)

        {

            ELOG(ESATSA, "STSTransformation::Create:construct failed");

            // An Error occured in parsing the transformation string

            return NULL;

        }

        else

        {

            // there was no error in parsing the transformation string

            return self;

        }

    }

    else

    {

        ELOG(ESATSA, "STSTransformation::Create:object creation failed");

        *errCode = KSTSErrNoMemory;

        return NULL;

    }

}

STSTransformation::STSTransformation()

{

}

STSTransformation::~STSTransformation()

{

}

int STSTransformation::Construct(JNIEnv* aJni, jstring aTransformation)

{

    LOG(ESATSA, EInfo, "STSTransformation::Construct+");

    std::wstring algorithm;

    std::wstring mode;

    std::wstring padding;

    //convert the jstring to native string

    std::wstring transformation;

    try

    {

        transformation = java::util::JniUtils::jstringToWstring(aJni,

                         aTransformation);

    }

    catch (...)

    {

        ELOG(ESATSA, "caught exception. Return error code");

        return (KSTSErrNoSuchAlgorithm);

    }

    int index = transformation.find(STSTransformationDelim);

    if (index != wstring::npos)

    {

        // Must be in a form of algorithm/mode/padding

        // algorithm

        algorithm.assign(transformation, 0, index);

        // mode/padding

        std::wstring modeAndPadding(transformation, index + 1, wstring::npos);

        index = modeAndPadding.find(STSTransformationDelim);

        if (index == wstring::npos)

        {

            ELOG(ESATSA, "mode or padding is missing");

            // There isn't delimeter, mode or padding is missing

            return (KSTSErrNoSuchAlgorithm);

        }

        // mode

        mode.assign(modeAndPadding, 0, index);

        if (mode.length() < 1)

        {

            ELOG(ESATSA, "mode was not found");

            // Mode wasn't found

            return (KSTSErrNoSuchAlgorithm);

        }

        // padding

        padding.assign(modeAndPadding, index + 1, wstring::npos);

        if (padding.length() < 1)

        {

            ELOG(ESATSA, "padding was not found");

            // Padding wasn't found

            return (KSTSErrNoSuchPadding);

        }

    }

    else

    {

        // If there is no delimeter in the string it

        // must contain only algorithm.

        algorithm.assign(transformation);

        // Mode and padding aren't defined

        // Use default ones

        mode.assign(STSModeECB);

        padding.assign(STSPaddingPKCS5);

    }

    // parsing over, assign the parsed tokens

    mAlgorithm = algorithm;

    mMode = mode;

    mPadding = padding;

    return 0;

}

const std::wstring STSTransformation::Algorithm()

{

    LOG(ESATSA, EInfo, "STSTransformation::Algorithm+");

    // Construction is failed if mAlgorithm is not valid

    return mAlgorithm;

}

const std::wstring STSTransformation::Mode()

{

    LOG(ESATSA, EInfo, "STSTransformation::Mode+");

    // Construction is failed if mMode is not valid

    return mMode;

}

const std::wstring STSTransformation::Padding()

{

    LOG(ESATSA, EInfo, "STSTransformation::Padding+");

    // Construction is failed if mPadding is not valid

    return mPadding;

}

} // namespace satsa

} // namespace java