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<!DOCTYPE concept

  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

<concept xml:lang="en" id="GUID-9E3ADEB4-C000-525D-B220-2BAFF5DC6B0C-GENID-1-12-1-26-1-1-9-1-12-1-4-1"><title>Password Based Encryption (PBE) example support code</title><prolog><metadata><keywords/></metadata></prolog><conbody><p>Below is the supporting code for the <xref href="GUID-3385079E-84F4-534F-B937-BD3A568D71BC-GENID-1-12-1-26-1-1-9-1-12-1-3-1.dita">PBE example code</xref>. </p> <section id="GUID-8EC8BE08-9961-487A-83C9-766B61C22BB7-GENID-1-12-1-26-1-1-9-1-12-1-4-1-2-2"><title/><codeblock id="GUID-E9CCC5E6-FDB6-53A0-B7F3-85CFD57FE290-GENID-1-12-1-26-1-1-9-1-12-1-4-1-2-2-2" xml:space="preserve">

#include "e32std.h"

#include "f32file.h"

#include "s32file.h"

#include "pbe.h"

#include "pbedata.h"

            </codeblock> <codeblock id="GUID-A6FDAAD3-8418-59BD-BE62-6F4C31F0F3CF-GENID-1-12-1-26-1-1-9-1-12-1-4-1-2-2-3" xml:space="preserve">

/*

 * Class to demonstrate the use of the PBE API.

 */

class CPBEExample : public CBase

         {

public:

         static CPBEExample* NewLC();

         virtual ~CPBEExample();

         void WriteEncryptedDataL(const TDesC8& aInput, const TDesC& aFilename, const TDesC& aPassword);

         HBufC8* ReadEncryptedDataLC(const TDesC& aFilename, const TDesC& aPassword);

private:

         CPBEExample();

         void ConstructL();

private:

         RFs iFs;

         };

            </codeblock> <codeblock id="GUID-4F7B60AF-62C3-55B3-B1F9-3084D68A97AB-GENID-1-12-1-26-1-1-9-1-12-1-4-1-2-2-4" xml:space="preserve">

CPBEExample* CPBEExample::NewLC()

         {

         CPBEExample* self = new (ELeave) CPBEExample();

         CleanupStack::PushL(self);

         self->ConstructL();

         return self;

         }

CPBEExample::CPBEExample()

         {

         }

void CPBEExample::ConstructL()

         {

         User::LeaveIfError(iFs.Connect());

         }

CPBEExample::~CPBEExample()

         {

         iFs.Close();

         }

            </codeblock> <codeblock id="GUID-17DECEE0-FE01-5F1F-9143-02462DE3C418-GENID-1-12-1-26-1-1-9-1-12-1-4-1-2-2-5" xml:space="preserve">

LOCAL_D void RunPBEExampleL()

         {

         _LIT(KFilename, "c:\\pbe_example_data.dat");

         _LIT8(KInputData, "This is the data to be encrypted");

         _LIT(KPassword, "pa55w0rd");

         CPBEExample* main = CPBEExample::NewLC();

         main->WriteEncryptedDataL(KInputData, KFilename, KPassword);

         HBufC8* outputData = main->ReadEncryptedDataLC(KFilename, KPassword);

         ASSERT(*outputData == KInputData);

         CleanupStack::PopAndDestroy(2, main);

         }

            </codeblock> <codeblock id="GUID-589330F6-B593-5722-AD3B-73CA53BEDB76-GENID-1-12-1-26-1-1-9-1-12-1-4-1-2-2-6" xml:space="preserve">

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;

    }

            </codeblock> </section> </conbody></concept>