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<concept xml:lang="en" id="GUID-267D1E20-002E-53C7-8AE5-E063206C1562"><title>Secure stream encryption example support code</title><prolog><metadata><keywords/></metadata></prolog><conbody><p>Below is the supporting code for the <xref href="GUID-598B6698-3518-50CA-98DE-D85CB255BA2D.dita">secure stream example code</xref>. </p> <section id="GUID-77E39C51-FE08-4EEB-B94A-4ECD8104E1ED"><title/><codeblock id="GUID-02ECEC04-E291-51B3-86DF-2FB28347F5AD" xml:space="preserve">
#include "e32std.h"
#include "f32file.h"
#include "s32file.h"
#include "pbe.h"
#include "pbedata.h"
#include "s32crypt.h"
            </codeblock> <codeblock id="GUID-13A09565-981A-56C0-9AC7-B849FFBE7395" xml:space="preserve">
/*
 * Class to demonstrate the use of secure stream encryption APIs.
 */
class CSecureStreamExample : public CBase
         {
public:
         static CSecureStreamExample* NewLC();
         virtual ~CSecureStreamExample();
         
         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:
         CSecureStreamExample();
         void ConstructL();
private:
         RFs iFs;
         };
            </codeblock> <codeblock id="GUID-B23E19C7-F6AD-5CB4-A944-EFEDC45AB623" xml:space="preserve">
CSecureStreamExample* CSecureStreamExample::NewLC()
         {
         CSecureStreamExample* self = new (ELeave) CSecureStreamExample();
         CleanupStack::PushL(self);
         self-&gt;ConstructL();
         return self;
         }

CSecureStreamExample::CSecureStreamExample()
         {
         }

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

CSecureStreamExample::~CSecureStreamExample()
         {
         iFs.Close();
         }
            </codeblock> <codeblock id="GUID-11B8C0DD-AD05-53BB-BAD2-6F31457A2DD9" 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");

         CSecureStreamExample* main = CSecureStreamExample::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-0B93114C-6801-5053-85C3-181779A6185F" 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>