Week 23 contribution of SDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
<!-- This component and the accompanying materials are made available under the terms of the License
"Eclipse Public License v1.0" which accompanies this distribution,
and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
<!-- Initial Contributors:
Nokia Corporation - initial contribution.
Contributors:
-->
<!DOCTYPE concept
PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
<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& aInput, const TDesC& aFilename, const TDesC& aPassword);
HBufC8* ReadEncryptedDataLC(const TDesC& aFilename, const TDesC& 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->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->WriteEncryptedDataL(KInputData, KFilename, KPassword);
HBufC8* outputData = main->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>