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-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">

    13 #include "e32std.h"

    14 #include "f32file.h"

    15 #include "s32file.h"

    16 #include "pbe.h"

    17 #include "pbedata.h"

    18 #include "s32crypt.h"

    19             </codeblock> <codeblock id="GUID-13A09565-981A-56C0-9AC7-B849FFBE7395" xml:space="preserve">

    20 /*

    21  * Class to demonstrate the use of secure stream encryption APIs.

    22  */

    23 class CSecureStreamExample : public CBase

    24          {

    25 public:

    26          static CSecureStreamExample* NewLC();

    27          virtual ~CSecureStreamExample();

    28          

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

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

    31 private:

    32          CSecureStreamExample();

    33          void ConstructL();

    34 private:

    35          RFs iFs;

    36          };

    37             </codeblock> <codeblock id="GUID-B23E19C7-F6AD-5CB4-A944-EFEDC45AB623" xml:space="preserve">

    38 CSecureStreamExample* CSecureStreamExample::NewLC()

    39          {

    40          CSecureStreamExample* self = new (ELeave) CSecureStreamExample();

    41          CleanupStack::PushL(self);

    42          self->ConstructL();

    43          return self;

    44          }

    45 

    46 CSecureStreamExample::CSecureStreamExample()

    47          {

    48          }

    49 

    50 void CSecureStreamExample::ConstructL()

    51          {

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

    53          }

    54 

    55 CSecureStreamExample::~CSecureStreamExample()

    56          {

    57          iFs.Close();

    58          }

    59             </codeblock> <codeblock id="GUID-11B8C0DD-AD05-53BB-BAD2-6F31457A2DD9" xml:space="preserve">

    60 LOCAL_D void RunPBEExampleL()

    61          {

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

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

    64          _LIT(KPassword, "pa55w0rd");

    65 

    66          CSecureStreamExample* main = CSecureStreamExample::NewLC();

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

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

    69          ASSERT(*outputData == KInputData);

    70          CleanupStack::PopAndDestroy(2, main);

    71          }

    72             </codeblock> <codeblock id="GUID-0B93114C-6801-5053-85C3-181779A6185F" xml:space="preserve">

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

    74     {

    75          __UHEAP_MARK;

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

    77          TRAPD(error, RunPBEExampleL());

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

    79          delete cleanup; // destroy clean-up stack

    80          __UHEAP_MARKEND;

    81          return 0;

    82     }

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