1 <?xml version="1.0" encoding="utf-8"?>

     2 <!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->

     3 <!-- This component and the accompanying materials are made available under the terms of the License 

     4 "Eclipse Public License v1.0" which accompanies this distribution, 

     5 and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->

     6 <!-- Initial Contributors:

     7     Nokia Corporation - initial contribution.

     8 Contributors: 

     9 -->

    10 <!DOCTYPE concept

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

    12 <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">

    13 #include "e32std.h"

    14 #include "f32file.h"

    15 #include "s32file.h"

    16 #include "pbe.h"

    17 #include "pbedata.h"

    18             </codeblock> <codeblock id="GUID-A6FDAAD3-8418-59BD-BE62-6F4C31F0F3CF" xml:space="preserve">

    19 /*

    20  * Class to demonstrate the use of the PBE API.

    21  */

    22 class CPBEExample : public CBase

    23          {

    24 public:

    25          static CPBEExample* NewLC();

    26          virtual ~CPBEExample();

    27          

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

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

    30 private:

    31          CPBEExample();

    32          void ConstructL();

    33 private:

    34          RFs iFs;

    35          };

    36             </codeblock> <codeblock id="GUID-4F7B60AF-62C3-55B3-B1F9-3084D68A97AB" xml:space="preserve">

    37 CPBEExample* CPBEExample::NewLC()

    38          {

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

    40          CleanupStack::PushL(self);

    41          self->ConstructL();

    42          return self;

    43          }

    44 

    45 CPBEExample::CPBEExample()

    46          {

    47          }

    48 

    49 void CPBEExample::ConstructL()

    50          {

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

    52          }

    53 

    54 CPBEExample::~CPBEExample()

    55          {

    56          iFs.Close();

    57          }

    58             </codeblock> <codeblock id="GUID-17DECEE0-FE01-5F1F-9143-02462DE3C418" xml:space="preserve">

    59 LOCAL_D void RunPBEExampleL()

    60          {

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

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

    63          _LIT(KPassword, "pa55w0rd");

    64 

    65          CPBEExample* main = CPBEExample::NewLC();

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

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

    68          ASSERT(*outputData == KInputData);

    69          CleanupStack::PopAndDestroy(2, main);

    70          }

    71             </codeblock> <codeblock id="GUID-589330F6-B593-5722-AD3B-73CA53BEDB76" xml:space="preserve">

    72 GLDEF_C TInt E32Main() // main function called by E32

    73     {

    74          __UHEAP_MARK;

    75          CTrapCleanup* cleanup = CTrapCleanup::New(); // get clean-up stack

    76          TRAPD(error, RunPBEExampleL());

    77          __ASSERT_ALWAYS(!error,User::Panic(_L("pbe_example_code"),error));

    78          delete cleanup; // destroy clean-up stack

    79          __UHEAP_MARKEND;

    80          return 0;

    81     }

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