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<task id="GUID-384A25D6-EC89-576E-857F-D8D26292FED9" xml:lang="en"><title> Importing

Keys</title><shortdesc>This section describes how to import a key from a file using the

keystore. </shortdesc><prolog><metadata><keywords/></metadata></prolog><taskbody>

<context><p>An externally generated key can be stored in the keystore using

the import functionality. Use the <xref href="GUID-818689D6-EB99-382E-A435-D9C6C5D464DE.dita#GUID-818689D6-EB99-382E-A435-D9C6C5D464DE/GUID-9A2E3ABC-4992-31F1-B03E-090DB3C6DC66"><apiname>CUnifiedKeyStore::ImportKey()</apiname></xref> function

to import a key into the keystore. </p><p> The following steps explain the

process of importing keys:</p> </context>

<steps id="GUID-7AD9B618-A5E5-5C32-82D4-1B8E18B13C2C">

<step id="GUID-0349CB41-E21A-5BED-BB0C-5A9AFE3AF7CA"><cmd/>

<info>Create a file system session using an <xref href="GUID-E263C747-946F-35AA-9F1D-41833BD350FC.dita"><apiname>RFs</apiname></xref> object. </info>

</step>

<step id="GUID-72A8537C-75A3-51B4-ACD2-0647A69D5528"><cmd/>

<info>Create an object of type CUnifiedKeyStore using <xref href="GUID-818689D6-EB99-382E-A435-D9C6C5D464DE.dita#GUID-818689D6-EB99-382E-A435-D9C6C5D464DE/GUID-C7A96153-4179-3B3F-878D-1EAA64A98D39"><apiname>CUnifiedKeyStore::NewL()</apiname></xref> or <xref href="GUID-818689D6-EB99-382E-A435-D9C6C5D464DE.dita#GUID-818689D6-EB99-382E-A435-D9C6C5D464DE/GUID-217FBB3B-CEF5-36F2-A612-EDDA0982053C"><apiname>CUnifiedKeyStore::NewLC()</apiname></xref> function. </info>

</step>

<step id="GUID-AF402EF4-C1A5-5124-9C21-4A45B81F1D0C"><cmd/>

<info>Initialize the member functions and keystore using the asynchronous

function <xref href="GUID-818689D6-EB99-382E-A435-D9C6C5D464DE.dita#GUID-818689D6-EB99-382E-A435-D9C6C5D464DE/GUID-6C5D732C-1FD1-3EF0-AC90-87690F891B8D"><apiname>CUnifiedKeyStore::Initialize()</apiname></xref>. </info>

</step>

<step id="GUID-03708DBC-2367-55CE-B492-1E3CE0F42EA6"><cmd/>

<info>Open the file in read-only mode using the <xref href="GUID-BE0804F6-4375-3C8A-8C83-968F510466E0.dita"><apiname>RFile</apiname></xref> object. </info>

</step>

<step id="GUID-00E736F5-E3AA-5537-92EC-8D287790516E"><cmd/>

<info>Import the key using <xref href="GUID-818689D6-EB99-382E-A435-D9C6C5D464DE.dita#GUID-818689D6-EB99-382E-A435-D9C6C5D464DE/GUID-9A2E3ABC-4992-31F1-B03E-090DB3C6DC66"><apiname>CUnifiedKeyStore::ImportKey()</apiname></xref>. </info>

</step>

</steps>

<result><p>The required key is imported into the selected keystore. </p> </result>

<example><title>Example</title> <p>The following code snippet shows how to

create a file system session object, initialize keystore and member functions,

and import a key. </p> <codeblock id="GUID-3FB35264-562C-5FD8-B3B6-1770BF5CA28D" xml:space="preserve">

//Create a file system session object

RFs iFs;

CleanupClosePushL(&iFs);

//Initialise the keystore and member functions

CUnifiedKeyStore* keyStore = CUnifiedKeyStore::NewL(iFs);

keyStore->Initialize(iStatus); //iStatus is a TRequestStatus object

...

HBufC8* keyData = NULL;

CleanupStack::PushL(keyData);

// Specify the path of the file containing the key details

TDriveUnit sysDrive (RFs::GetSystemDrive());

TFileName keyDataFile (sysDrive.Name());

keyDataFile.Append(_LIT("<path where key is located; relative to the system drive in this case.>"));

//Specify the filename

TFileName buf;

buf.FillZ();

buf.Copy(aDes); //Filename

keyDataFile.Append(buf); 

//Open the file in read-only mode

RFile file;

User::LeaveIfError(file.Open(iFs, keyDataFile, EFileRead));

CleanupClosePushL(file);

TInt fileSize = 0;

User::LeaveIfError(file.Size(fileSize));

HBufC8* iKeyData;

if (fileSize > 0)

    {

     iKeyData = HBufC8::NewMaxLC(fileSize);    

     TPtr8 data(iKeyData->Des());

     data.FillZ();

     User::LeaveIfError(file.Read(data, fileSize));

    }

//Import the key into the keystore

keyStore->ImportKey(0, iKeyData->Des(), usage, KLabel, accessType,

                TTime(0), keyInfo, iStatus);

//Clean up

CleanupStack::Pop(keyData);

CleanupStack::PopAndDestroy(); // file

CleanupStack::PopAndDestroy(); // iFs</codeblock> </example>

</taskbody><related-links>

<link href="GUID-C4389D60-2A8D-532D-9D92-E57B0CCD14CF.dita"><linktext>Unified Keystore</linktext>

</link>