/*

 * 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);

 		}

 	}