/*

 * 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);

 	}