Secure stream encryption example support code

       
        
       
       #include "e32std.h"
#include "f32file.h"
#include "s32file.h"
#include "pbe.h"
#include "pbedata.h"
#include "s32crypt.h"
      

       
        
       
       /*
 * Class to demonstrate the use of secure stream encryption APIs.
 */
class CSecureStreamExample : public CBase
         {
public:
         static CSecureStreamExample* NewLC();
         virtual ~CSecureStreamExample();
         
         void WriteEncryptedDataL(const TDesC8& aInput, const TDesC& aFilename, const TDesC& aPassword);
         HBufC8* ReadEncryptedDataLC(const TDesC& aFilename, const TDesC& aPassword);
private:
         CSecureStreamExample();
         void ConstructL();
private:
         RFs iFs;
         };
      

       
        
       
       CSecureStreamExample* CSecureStreamExample::NewLC()
         {
         CSecureStreamExample* self = new (ELeave) CSecureStreamExample();
         CleanupStack::PushL(self);
         self->ConstructL();
         return self;
         }

CSecureStreamExample::CSecureStreamExample()
         {
         }

void CSecureStreamExample::ConstructL()
         {
         User::LeaveIfError(iFs.Connect());
         }

CSecureStreamExample::~CSecureStreamExample()
         {
         iFs.Close();
         }
      

       
        
       
       LOCAL_D void RunPBEExampleL()
         {
         _LIT(KFilename, "c:\\pbe_example_data.dat");
         _LIT8(KInputData, "This is the data to be encrypted.");
         _LIT(KPassword, "pa55w0rd");

         CSecureStreamExample* main = CSecureStreamExample::NewLC();
         main->WriteEncryptedDataL(KInputData, KFilename, KPassword);
         HBufC8* outputData = main->ReadEncryptedDataLC(KFilename, KPassword);
         ASSERT(*outputData == KInputData);
         CleanupStack::PopAndDestroy(2, main);
         }
      

       
        
       
       GLDEF_C TInt E32Main() // main function called by E32
    {
         __UHEAP_MARK;
         CTrapCleanup* cleanup = CTrapCleanup::New(); // get clean-up stack
         TRAPD(error, RunPBEExampleL());
         __ASSERT_ALWAYS(!error,User::Panic(_L("pbe_example_code"),error));
         delete cleanup; // destroy clean-up stack
         __UHEAP_MARKEND;
         return 0;
    }