/*

* 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 "pkcs7signerinfo.h"

#include "pkcs7issuerserial.h"

#include "pkcs7asn1.h"

#include "signed.h"

#include <asn1dec.h>

#include <x509cert.h>

CPKCS7SignerInfo* CPKCS7SignerInfo::NewL(const TDesC8& aRawData)

	{

	CPKCS7SignerInfo* self = new (ELeave) CPKCS7SignerInfo();

	CleanupStack::PushL(self);

	self->ConstructL(aRawData);

	CleanupStack::Pop(self);

	return self;

	}

CPKCS7SignerInfo::~CPKCS7SignerInfo(void)

	{

	delete iIssuerAndSerialNumber;

	delete iDigestAlgorithm;

	delete iDigestEncryptionAlgorithm;

	delete iEncryptedDigest;

	}

CPKCS7SignerInfo::CPKCS7SignerInfo(void)

	{

	}

EXPORT_C TInt CPKCS7SignerInfo::Version() const

	{

	return iVersion;

	}

EXPORT_C const CPKCS7IssuerAndSerialNumber& CPKCS7SignerInfo::IssuerAndSerialNumber() const

	{

	return *iIssuerAndSerialNumber;

	}

EXPORT_C const CX509AlgorithmIdentifier& CPKCS7SignerInfo::DigestAlgorithm() const

	{

	return *iDigestAlgorithm;

	}

EXPORT_C const CX509AlgorithmIdentifier& CPKCS7SignerInfo::DigestEncryptionAlgorithm() const

	{

	return *iDigestEncryptionAlgorithm;

	}

EXPORT_C const TPtrC8 CPKCS7SignerInfo::EncryptedDigest() const

	{

	return *iEncryptedDigest;

	}

void CPKCS7SignerInfo::ConstructL(const TDesC8& aRawData)

	{

	CArrayPtr<TASN1DecGeneric>* signerInfo = PKCS7ASN1::DecodeSequenceLC(aRawData, 5, 7);

	TASN1DecInteger decInt;

	TInt pos = 3;

	// decodes version

	iVersion = decInt.DecodeDERShortL(*signerInfo->At(0));	

	iIssuerAndSerialNumber = CPKCS7IssuerAndSerialNumber::NewL(signerInfo->At(1)->Encoding());

	iDigestAlgorithm = CX509AlgorithmIdentifier::NewL(signerInfo->At(2)->Encoding());

	if(signerInfo->At(pos)->Tag() == 0)

		{

		// authenticated attributes not supported at this time

		pos++;

		}

	iDigestEncryptionAlgorithm = CX509AlgorithmIdentifier::NewL(signerInfo->At(pos++)->Encoding());

	DecodeEncryptedDigestL(signerInfo->At(pos++)->Encoding());

	if(pos < signerInfo->Count() && (signerInfo->At(pos)->Tag() == 0))

		{

		// unauthenticated attributes not supported at this time

		pos++;		

		}

	CleanupStack::PopAndDestroy(signerInfo);

	}

void CPKCS7SignerInfo::DecodeEncryptedDigestL(const TDesC8& aRawData)

	{

	TASN1DecGeneric decGen(aRawData);

	decGen.InitL();

	if(decGen.Tag() == EASN1OctetString)

		{

		TASN1DecOctetString decOct;

		iEncryptedDigest = decOct.DecodeDERL(decGen);

		}

	else

		{

		User::Leave(KErrArgument);

		}

	}