/*

* Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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: 

*

*/

#include "pkcs7contentinfo_v2.h"

#include "pkcs7asn1.h"

EXPORT_C CPKCS7ContentInfo* CPKCS7ContentInfo::NewL(const TDesC8& aRawData)

	{

	CPKCS7ContentInfo* self = new (ELeave) CPKCS7ContentInfo();

	CleanupStack::PushL(self);

	self->ConstructL(aRawData);

	CleanupStack::Pop(self);

	return self;	

	}

CPKCS7ContentInfo::~CPKCS7ContentInfo()

	{

	}

EXPORT_C CPKCS7ContentInfo::TContentInfoType CPKCS7ContentInfo::ContentType() const

	{

	return iContentType;

	}

EXPORT_C const TPtrC8 CPKCS7ContentInfo::ContentData() const

	{

	return iContentData;	

	}

CPKCS7ContentInfo::CPKCS7ContentInfo(void)

	{

	}

void CPKCS7ContentInfo::ConstructL(const TDesC8& aRawData)

	{  

	const TInt minItems = 1;	// Must have OID

	const TInt maxItems = 2;	// May have data

	CArrayPtr<TASN1DecGeneric>* contentInfo = PKCS7ASN1::DecodeSequenceLC(aRawData, minItems, maxItems);

    const TASN1DecGeneric* contentInfoAt0 = contentInfo->At(0);

	// Checks its a oid id

	if(contentInfoAt0->Tag()==EASN1ObjectIdentifier || contentInfoAt0->Class() == EUniversal)

		{

		// Gets the oid

		TASN1DecObjectIdentifier oidDec;

		HBufC* oidVal = oidDec.DecodeDERL(*contentInfo->At(0));

		CleanupStack::PushL(oidVal);

		// Data itself is optional so make sure its there

		if(contentInfo->Count() == 2)

			{

			const TASN1DecGeneric* contentInfoAt1 = contentInfo->At(1);

			if ( contentInfoAt1->Tag() == 0 || contentInfoAt1->Class() == EContextSpecific )

				{

				TASN1DecGeneric decGen(contentInfoAt1->GetContentDER());

				decGen.InitL();

	            if(*oidVal == KPkcs7DataOID)

					{

					// ContentData is OctetString if ContentType is Data

					if(decGen.Tag() == EASN1OctetString)   

						{

						iContentData.Set(decGen.GetContentDER()); 

						}

					else

						{

						User::Leave(KErrArgument);

						}

					}

				else

					{

					iContentData.Set(decGen.Encoding());

					}

				}

			}

		else

			{

			iContentData.Set(KNullDesC8());

			}

		// Checks if it is data OID.

		if(*oidVal == KPkcs7DataOID)

			{

			// The Content Type is indicated by an Integer.

			// Here if Content Type is equal to Data then,it is represented by 1

			// 1 indicates the numeric value of last element in the PKCS7 Data OID.

			iContentType = EContentTypeData;

			}

		else if(*oidVal == KPkcs7SignedDataOID)

			{

			// The Content Type is indicated by an Integer.

			// Here if Content Type is equal to SignedData then,it is represented by 2

			// 2 indicates the numeric value of last element in the PKCS7 SignedData OID.

			iContentType = EContentTypeSignedData;

			}

		else if(*oidVal == KPkcs7EnvelopedDataOID) 

			{

			// The Content Type is indicated by an Integer.

			// Here if Content Type is equal to EnvelopedData then,it is represented by 3.

			// 3 indicates the numeric value of last element in the PKCS7 EnvelopedData OID.

			iContentType = EContentTypeEnvelopedData;

			}

		else if(*oidVal == KPkcs7SignedAndEnvelopedDataOID)

			{

			// The Content Type is indicated by an Integer.

			// Here if Content Type is equal to SignedAndEnvelopedData then,it is represented by 4.

			// 4 indicates the numeric value of last element in the PKCS7 SignedAndEnvelopedData OID.

			iContentType = EContentTypeSignedAndEnvelopedData;

			}

		else if(*oidVal == KPkcs7DigestedDataOID)

			{

			// The Content Type is indicated by an Integer.

			// Here if Content Type is equal to DigestedData then,it is represented by 5.

			// 5 indicates the numeric value of last element in the PKCS7 DigestedData OID.

			iContentType = EContentTypeDigestedData;

			}

		else if(*oidVal == KPkcs7EncryptedDataOID)

			{

			// The Content Type is indicated by an Integer.

			// Here if Content Type is equal to EncryptedData then,it is represented by 6

			// 6 indicates the numeric value of last element in the PKCS7 EncryptedData OID.

			iContentType = EContentTypeEncryptedData;

			}

		else

			{

			User::Leave(KErrNotSupported);

			}

		CleanupStack::PopAndDestroy(oidVal);

		}

	else

		{

		User::Leave(KErrArgument);

		}

	CleanupStack::PopAndDestroy(contentInfo);

	}