/*

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   may be used to endorse or promote products derived from this software 

   without specific prior written permission.

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 

 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 

 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 

 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE 

 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 

 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 

 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 

 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 

 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 

 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 Description:  Contains implementation for x509_add_symbian_cert - to use certificates installed in Symbian with OpenSSL code.

 */

 #include "certretriever.h"

 #include "createx509.h"

 #include <securitydefsconst.h>

 #ifdef __cplusplus

 extern "C" 

 {

 #endif

 int X509_add_symbian_certsL(X509_STORE * store)

 {

 	CActiveScheduler* activeScheduler;

 	CActiveScheduler* CurrentActiveScheduler = CActiveScheduler::Current();

 	if(CurrentActiveScheduler == NULL)

 	{

 		activeScheduler = new (ELeave) CActiveScheduler;

 		CleanupStack::PushL(activeScheduler);

 		CActiveScheduler::Install(activeScheduler);

 	}

 	TRequestStatus status;

 	CCertRetriever* certRetriever;

 	TRAPD(error, certRetriever = CCertRetriever::NewL(store, status, CActiveScheduler::Current()));

 	// create CActiveSchedulerWait

 	if (CurrentActiveScheduler)

 	{

 		certRetriever->activeSchedulerwait = new (ELeave) CActiveSchedulerWait; 

 		certRetriever->OwnScheduler = EFalse;	

 	}

 	if(error != KErrNone)

 	{

 		CleanupStack::PopAndDestroy();	// activeScheduler

 		return 0;

 	}

 	CleanupStack::PushL(certRetriever);	

 	TRAP(error,certRetriever->RetriveCertificateL());

 	if(error != KErrNone)

 	{

 		if(CurrentActiveScheduler == NULL)

 		{

 			CleanupStack::PopAndDestroy(2);	// activeScheduler, certRetriever

 		}

 		else

 			CleanupStack::PopAndDestroy();	// certRetriever

 		return 0;

 	}

 	if(CurrentActiveScheduler == NULL)

 	{

 		activeScheduler->Start();

 		 CleanupStack::PopAndDestroy(2); // If you destroy the object it will not be there

 										   // in the iActiveQ, and hence stray signal.

 		//CleanupStack::Pop(2);	   // So just pop it. // activeScheduler, certRetriever						   

 	}

 	else

 	{

 	//	CurrentActiveScheduler->Start();// If you are using CActiveScheduler::Current();

 										  // Why u want to start it again?	

         // CleanupStack::PopAndDestroy(); // If you destroy the object it will not be there

 										  // in the iActiveQ, and hence stray signal.	

 		// should wait here untill it finish loading certificates, ths API is synchronous

 		certRetriever->activeSchedulerwait->Start();

 		CleanupStack::Pop(); 		  // So just pop it. // certRetriever

 	}

 	if(status == KErrNone)

 		return 1;

 	else

 		return 0;

 }

 #ifdef __cplusplus

 }

 #endif

 CCertRetriever::CCertRetriever(X509_STORE* aStore, 

 				TRequestStatus& aStatus,

 				const CActiveScheduler* aActiveScheduler)

 			: CActive(CActive::EPriorityHigh), 

 			  iStore(aStore),

 			  iFinStatus ( aStatus ),

 			  iActiveScheduler(aActiveScheduler),

 			  iCertPtr(0,0)			  

 	{

 	OwnScheduler = ETrue;

 	if(iActiveScheduler)

 		iActiveScheduler->Add(this);

 	}

 CCertRetriever::~CCertRetriever()

 	{

 		Cancel();

  		delete iBuf;

  		delete iCertFilter;

  	 	iCerts.Close();	

  		delete iCertStore;

  		iFs.Close();

  		if(!OwnScheduler)

  		  delete activeSchedulerwait;

  	}

 CCertRetriever* CCertRetriever::NewLC(X509_STORE* aStore,

 						TRequestStatus& aStatus, 

 						const CActiveScheduler* aActiveScheduler)

 	{

 	CCertRetriever* self = new (ELeave) CCertRetriever(aStore, aStatus, aActiveScheduler);

 	CleanupStack::PushL(self);

 	TRAPD(err,self->ConstructL());

 	if(err != KErrNotFound)

 		return self;

 	CleanupStack::PopAndDestroy(self);	

 	return NULL;

 	}

 CCertRetriever* CCertRetriever::NewL(X509_STORE* aStore,

 						TRequestStatus& aStatus, 

 						const CActiveScheduler* aActiveScheduler)

 	{

 	CCertRetriever* self = CCertRetriever::NewLC(aStore, aStatus, aActiveScheduler);

 	if(self)

 		CleanupStack::Pop();

 	return self;

 	}

 void CCertRetriever::ConstructL()

 	{

 		TInt err = iFs.Connect();

 		if(err != KErrNone)

 			User::Leave(err);

  		iState = EInitializeCertStore;

  		iBuf = HBufC8::NewL(KMaxCertLength);

 	}

 void CCertRetriever::RunL()

 	{

 	// 1. All certificates retrieved.

 	// 2. yes. check iActiveScheduler. if null then call User::RequestComplete(iStatus) else iActiveScheduler->Stop();

 	User::LeaveIfError(iStatus.Int());

 		switch(iState)

 		{

 		case EInitializeCertStore:

 					OpenUnifiedCertStoreL();		

 					break;

 		case EListCerts:

 					ListCertsL();	

 					break;

 		case EAppendCerts:

 					if (!iCerts.Count()) // no certificate in store.

 					{

 						iState = ENoCerts;												

 					}

 					else

 					{

 						AppendCertsL();

 						break;	

 					}			

 		case EDone:

 					if (iState != ENoCerts)

 					{

 						ProcessCertsL();	//Process the last certificate

 						iCertCount = 0;	

 					}					

 		case ENoCerts:

 					if(iActiveScheduler)

 					{

 						if(OwnScheduler)

 							iActiveScheduler->Stop();

 						else

 							activeSchedulerwait->AsyncStop();

 						iFinStatus = iStatus;

 					}

 					else

 					{

 						TRequestStatus *s = &iFinStatus;

 						User::RequestComplete(s, KErrNone);	

 					}

 					break;

 		default:

 				User::Leave(KErrNotFound);

 				break;

 		}

 	}

 void CCertRetriever::DoCancel()

 	{

 	}

 TInt CCertRetriever::RunError(TInt aError)

 	{

 		//Can do some error handling here

 		if(iActiveScheduler)

 		{

 			iActiveScheduler->Stop();

 			iFinStatus = iStatus;

 		}

 		else

 		{

 			TRequestStatus *s = &iFinStatus;

 			User::RequestComplete(s, aError);	

 		}

 		return KErrNone; 

 	}

 void CCertRetriever::RetriveCertificateL()

 	{

 		OpenUnifiedCertStoreL();

 	}

 void CCertRetriever::OpenUnifiedCertStoreL()

     {

     	iState = EListCerts;

     	delete iCertStore;

     	iCertStore = NULL;

     	iCertStore = CUnifiedCertStore::NewL(iFs, EFalse);

     	iCertStore->Initialize(iStatus);

     	SetActive();

     }

 void CCertRetriever::ListCertsL()

 {

     // Create filter object

    delete iCertFilter;

    iCertFilter = NULL;

    iCertFilter = CCertAttributeFilter::NewL();    

    iCertFilter->SetFormat(EX509Certificate);

    iCertFilter->SetOwnerType(ECACertificate);

    iCertFilter->SetUid(KTlsApplicabilityUid);

     iStatus = KRequestPending;

     SetActive();

     iCertStore->List(iCerts, *iCertFilter, iStatus);

     iState = EAppendCerts;

 }

 void CCertRetriever::AppendCertsL()

 {

 	if(iCertCount>0)	

 		ProcessCertsL();

 	CCTCertInfo *cert = iCerts[iCertCount];

 	SetActive();			

 	iStatus == KRequestPending;

 	iCertPtr.Set( iBuf->Des() );

     iCertStore->Retrieve((*cert),iCertPtr,iStatus);

 	iCertCount++;

 		if(iCertCount == iCerts.Count())

 			iState = EDone;	

 }

 void CCertRetriever::ProcessCertsL()

 {

 	CX509Certificate *X509Cert;

 	TRAPD(error, X509Cert = CX509Certificate::NewL( iCertPtr ));

 	if(error !=KErrNone)

 		return;

 	CleanupStack::PushL(X509Cert);

 	X509* x509 = CX509_Initializer::CreateX509L(X509Cert);

 	if(x509)

 	{

 		X509_STORE_add_cert(iStore,x509);

 		X509_free(x509);

 	}

 	CleanupStack::PopAndDestroy(); //X509Cert

 }