/*
* Copyright (c) 2007-2010 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: 
* Example CTestStep derived implementation
*
*/


/**
 @file
 @internalTechnology
*/
#include "hmacbasichashofdatastep.h"

#include <cryptospi/cryptohashapi.h>
#include <cryptospi/keys.h>
#include <cryptospi/plugincharacteristics.h>

using namespace CryptoSpi;

CHmacBasicHashOfDataStep::~CHmacBasicHashOfDataStep()
	{
	}


CHmacBasicHashOfDataStep::CHmacBasicHashOfDataStep()
	{
	SetTestStepName(KHmacBasicHashOfDataStep);
	}


TVerdict CHmacBasicHashOfDataStep::doTestStepPreambleL()
	{
	SetTestStepResult(EPass);
	return TestStepResult();
	}


TVerdict CHmacBasicHashOfDataStep::doTestStepL()
	{
	if (TestStepResult()==EPass)
		{
		
		//Assume faliure, unless all is successful
		SetTestStepResult(EFail);
		
		INFO_PRINTF1(_L("*** Hmac - Basic Hash of Data ***"));
		INFO_PRINTF2(_L("HEAP CELLS: %d"), User::CountAllocCells());
		
		TVariantPtrC algorithmUid;
		TVariantPtrC operationModeUid;
		TPtrC sourcePath;
		TPtrC expectedHash;
		TPtrC encryptKey;
		TVariantPtrC keyType;
		
		//Extract the Test Case ID parameter from the specified INI file
		if(!GetStringFromConfig(ConfigSection(),KConfigAlgorithmUid,algorithmUid) ||
			!GetStringFromConfig(ConfigSection(),KConfigOperationMode,operationModeUid) ||
			!GetStringFromConfig(ConfigSection(),KConfigSourcePath,sourcePath) ||
			!GetStringFromConfig(ConfigSection(),KConfigExHashHmacValue,expectedHash)||
			!GetStringFromConfig(ConfigSection(),KConfigEncryptKey,encryptKey) ||
			!GetStringFromConfig(ConfigSection(),KConfigEncryptKeyType,keyType))
			{
			ERR_PRINTF1(_L("** Error: Failed to Load Configuration Parameters **"));
			SetTestStepResult(EFail);
			}
		else
			{
			//Create a pointer for the Hash + Key (Hmac) Implementation Object
			CHash* hmacImpl = NULL;
			
			//Convert encryption key to an 8 Bit Descriptor
			HBufC8* keyStr = HBufC8::NewLC(encryptKey.Length());
			TPtr8 keyStrPtr = keyStr->Des();
			
			keyStrPtr.Copy(encryptKey);
						
			//Create an new CryptoParams object to encapsulate the key type and secret key string
			CCryptoParams* keyParams = CCryptoParams::NewL();
			CleanupStack::PushL(keyParams);
			keyParams->AddL(*keyStr,keyType);
			
			//Create Key Object
			TKeyProperty keyProperty;
			CKey* key=CKey::NewL(keyProperty,*keyParams);
			CleanupStack::PushL(key);
			
			//Retrieve a Hmac Factory Object			
			TRAPD(err,CHashFactory::CreateHashL(hmacImpl,
												algorithmUid,
												operationModeUid,
												key,
												NULL));											
	
			if(hmacImpl && (err == KErrNone))
				{
				//Push the Hmac Implementation Object onto the Cleanup Stack
				CleanupStack::PushL(hmacImpl);
				
				RFs fsSession;
				
				//Create a connection to the file server	
				err = fsSession.Connect();
					
				if(err != KErrNone)
					{
					ERR_PRINTF2(_L("*** Error: File Server Connection - %d ***"), err);
					SetTestStepResult(EFail);
					}	
				else
					{
					RFile sourceFile;
	    			CleanupClosePushL(sourceFile);
	    			
	    			//Open the specified source file		
	    			err = sourceFile.Open(fsSession,sourcePath, EFileRead);
	    					
	    			if(err != KErrNone)
						{
						ERR_PRINTF2(_L("*** Error: Opening Source File - %d ***"), err);
						SetTestStepResult(EFail);
						}
					else
						{
						TInt sourceLength = 0;
						User::LeaveIfError(sourceFile.Size(sourceLength));
						
						//Create a heap based descriptor to store the data
						HBufC8* sourceData = HBufC8::NewL(sourceLength);						
						CleanupStack::PushL(sourceData);
						TPtr8 sourcePtr = sourceData->Des();
						
						sourceFile.Read(sourcePtr);
							
						if(sourcePtr.Length() != sourceLength)
							{
							ERR_PRINTF1(_L("*** Error: Reading Source File ***"));
							SetTestStepResult(EFail);	
							}
						else
							{
							//Create a NULL TCharacteristics pointer
							const TCharacteristics* charsPtr(NULL);
							
							//Retrieve the characteristics for the hash implementation object
							TRAP_LOG(err, hmacImpl->GetCharacteristicsL(charsPtr));
							
							//Static cast the characteristics to type THashCharacteristics
							const THashCharacteristics* hashCharsPtr = static_cast<const THashCharacteristics*>(charsPtr);
							
							//The hash output size is returned in Bits, divide by 8 to get the Byte size
							TInt hashSize = hashCharsPtr->iOutputSize/8;
							
							//Retrieve the final 8bit hash value and convert to 16bit												
							HBufC* hashData = HBufC::NewLC(hashSize);
							TPtr hashPtr = hashData->Des();
							
							hashPtr.Copy(hmacImpl->Hash(*sourceData));
							
							//Take the 16bit descriptor and convert the string to hexadecimal
							TVariantPtrC convertHash;
							convertHash.Set(hashPtr);
							HBufC* hmacResult = convertHash.HexStringLC();								
							
							INFO_PRINTF2(_L("*** Hashed Data: %S ***"),&*hmacResult);
							INFO_PRINTF2(_L("*** Expected Hash: %S ***"),&expectedHash);
							
							//If the returned hash value matches the expected hash, Pass the test	
							if(*hmacResult == expectedHash)
								{
								INFO_PRINTF1(_L("*** Hmac - Basic Hash of Data : PASS ***"));
								SetTestStepResult(EPass);	
								}
							else
								{
								ERR_PRINTF2(_L("*** FAIL: Hashed and Expected Value Mismatch  ***"), err);
								SetTestStepResult(EFail);	
								}
								
							CleanupStack::PopAndDestroy(hmacResult);
							CleanupStack::PopAndDestroy(hashData);						
							}
							

						CleanupStack::PopAndDestroy(sourceData);
						}
						
					//Cleanup the Source RFile	
					CleanupStack::PopAndDestroy();	
					}
					
				fsSession.Close();	
				
				CleanupStack::PopAndDestroy(hmacImpl);
				}
			else
				{
				ERR_PRINTF2(_L("*** FAIL: Failed to Create Hmac Object - %d ***"), err);
				SetTestStepResult(EFail);	
				}
			
			CleanupStack::PopAndDestroy(key);
			CleanupStack::PopAndDestroy(keyParams);
			CleanupStack::PopAndDestroy(keyStr);
			}
		}
		
	INFO_PRINTF2(_L("HEAP CELLS: %d"), User::CountAllocCells());	
	
	return TestStepResult();
	}


TVerdict CHmacBasicHashOfDataStep::doTestStepPostambleL()
	{
	
	return TestStepResult();
	}