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<concept xml:lang="en" id="GUID-9E3ADEB4-C000-525D-B220-2BAFF5DC6B0C"><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.dita">PBE example code</xref>. </p> <section id="GUID-8EC8BE08-9961-487A-83C9-766B61C22BB7"><title/><codeblock id="GUID-E9CCC5E6-FDB6-53A0-B7F3-85CFD57FE290" 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" 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&amp; aInput, const TDesC&amp; aFilename, const TDesC&amp; aPassword);
         HBufC8* ReadEncryptedDataLC(const TDesC&amp; aFilename, const TDesC&amp; aPassword);
private:
         CPBEExample();
         void ConstructL();
private:
         RFs iFs;
         };
            </codeblock> <codeblock id="GUID-4F7B60AF-62C3-55B3-B1F9-3084D68A97AB" xml:space="preserve">
CPBEExample* CPBEExample::NewLC()
         {
         CPBEExample* self = new (ELeave) CPBEExample();
         CleanupStack::PushL(self);
         self-&gt;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" 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-&gt;WriteEncryptedDataL(KInputData, KFilename, KPassword);
         HBufC8* outputData = main-&gt;ReadEncryptedDataLC(KFilename, KPassword);
         ASSERT(*outputData == KInputData);
         CleanupStack::PopAndDestroy(2, main);
         }
            </codeblock> <codeblock id="GUID-589330F6-B593-5722-AD3B-73CA53BEDB76" 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>