/*

* Copyright (c) 2002-2004 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:  ?Description

*

*/

#include "certid.h"

#include "RoapOcsp.h"

#include "RoapDef.h"

#include <asn1dec.h>

const TUint KGoodTag = 0;

const TUint KRevokedTag = 1;

const TUint KUnknownTag = 2;

const TUint KNextUpdateTag = 0;

const TUint KSingleExtensionsTag = 1;

COCSPResponseCertInfo* COCSPResponseCertInfo::NewLC(CArrayPtr<TASN1DecGeneric>& items)

	{

	COCSPResponseCertInfo* self = new (ELeave) COCSPResponseCertInfo;

	CleanupStack::PushL(self);

	self->ConstructL(items);

	return self;

	}

COCSPResponseCertInfo::~COCSPResponseCertInfo()

	{

	delete iNextUpdate;

	delete iRevocationTime;

	delete iCertID;

	}

OCSP::TResult COCSPResponseCertInfo::Status() const

	{

	return iStatus;

	}

TTime COCSPResponseCertInfo::ThisUpdate() const

	{

	return iThisUpdate;

	}

const TTime* COCSPResponseCertInfo::NextUpdate() const

	{

	return iNextUpdate;

	}

const TTime* COCSPResponseCertInfo::RevocationTime() const

	{

	return iRevocationTime;

	}

COCSPCertID* COCSPResponseCertInfo::CertID() const

	{

	return iCertID;

	}

void COCSPResponseCertInfo::ConstructL(CArrayPtr<TASN1DecGeneric>& items)

	{

	// The CertID

	iCertID = COCSPCertID::NewL(items.At(0)->Encoding());

	// The cert status - implicitly tagged

	TASN1DecGeneric& statusDec = *items.At(1);

	switch(statusDec.Tag())

		{

		case KGoodTag:

			iStatus = OCSP::EGood;

			break;

		case KRevokedTag:

			{

			iStatus = OCSP::ERevoked;

			// Get revocation time

			TASN1DecSequence seqDec;

			CArrayPtr<TASN1DecGeneric>* revokedInfo = seqDec.DecodeDERLC(statusDec, 1, 2);

			if (revokedInfo)

				{

				TASN1DecGeneric& revocationTimeDec = *revokedInfo->At(0);

				if (revocationTimeDec.Tag() != EASN1GeneralizedTime)

					{

					User::Leave(OCSP::EMalformedResponse);

					}

				TASN1DecGeneralizedTime decGT;

				iRevocationTime = new (ELeave) TTime(decGT.DecodeDERL(revocationTimeDec));

				CleanupStack::PopAndDestroy();  // revokedInfo

				}

			break;

			}

		case KUnknownTag:

			iStatus = OCSP::EUnknown;

			break;

		default:

			User::Leave(OCSP::EMalformedResponse);

		}

	// Carry on with thisUpdate

	TASN1DecGeneralizedTime decGT;

	iThisUpdate = decGT.DecodeDERL(*items.At(2));

	// Optional bits...

	TInt numItems = items.Count();

	if (numItems > 3)

		{

		TInt nextItem = 3;

		// Maybe nextUpdate is there too

		TASN1DecGeneric& item4 = *items.At(3);

		if (item4.Tag() == KNextUpdateTag)

			{

			++nextItem;

			TASN1DecGeneralizedTime decGT;

			TInt pos = 0;

			iNextUpdate = new (ELeave) TTime (decGT.DecodeDERL(item4.GetContentDER(), pos));

			}

		// Check for extensions - we don't support any, but we need to leave if there are any marked 'critical'

		if (nextItem < numItems)

			{

			TASN1DecGeneric& extnList = *items.At(nextItem);

			if (extnList.Tag() == KSingleExtensionsTag)

				{

				// OK, we've got extensions, with an explicit tag.  Loop through them...

				TASN1DecSequence decSeq;

				TInt pos = 0;

				CArrayPtr<TASN1DecGeneric>* extns = decSeq.DecodeDERLC(extnList.GetContentDER(), pos);

				TInt numExts = extns->Count();

				for (TInt extIndex = 0; extIndex < numExts; ++extIndex)

					{

					TASN1DecGeneric& ext = *extns->At(extIndex);

					CArrayPtr<TASN1DecGeneric>* terms = decSeq.DecodeDERLC(ext);

					// Check critical flag (may be absent - default value false

					if (terms->Count() == 3)

						{

						TASN1DecBoolean boolDec;

						if (boolDec.DecodeDERL(*terms->At(1)))

							{

							User::Leave(OCSP::EUnknownCriticalExtension);

							}

						}

					CleanupStack::PopAndDestroy(); // Clean up 'terms'

					}

				CleanupStack::PopAndDestroy(); // Clean up 'extns'

				}

			}

		}

	}