author | Pat Downey <patd@symbian.org> |
Wed, 01 Sep 2010 12:21:16 +0100 | |
branch | RCL_3 |
changeset 72 | 1481bf457703 |
parent 18 | 8a03a285ab14 |
child 82 | a117e284a2c6 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: DRM Utility |
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* |
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*/ |
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|
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|
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// INCLUDE FILES |
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#include <oma2dcf.h> |
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#include <drmagents.h> |
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#include <drmutility.h> |
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#include <centralrepository.h> |
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#include <utf.h> |
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#include "Oma1Dcf.h" |
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|
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#include "DrmUtilityInternalcrkeys.h" // Cenrep extension for OmaBased |
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// CONSTANTS |
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_LIT8( KASFHeaderObject, "75B22630668E11CFA6D900AA0062CE6C" ); |
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_LIT8( KWrmHeader, "W\0R\0M\0H\0E\0A\0D\0E\0R\0" ); |
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const TInt KMinContentLength( 16 ); |
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const TInt KOma2EncryptionFieldOffset( 8 ); |
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const TInt KOmaHeaderLength( 512 ); |
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// This constant is for OMA1 case in which a buffer of 35-40 |
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// bytes is needed to recognize the mime type. |
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const TInt KMinContentLengthOma1Based( 40 ); |
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const TInt KWMHeaderObjectLength( 8 ); |
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const TInt KWMTopLevelHeaderObjectLength( 30 ); |
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const TInt KMaxWMHeaderLength( ( KMaxTInt32 / 2 ) - 1 ); |
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const TInt KCenRepDataLength( 50 ); |
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// ============================ LOCAL FUNCTIONS ================================ |
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// ----------------------------------------------------------------------------- |
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// FormatGUID |
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// ----------------------------------------------------------------------------- |
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// |
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LOCAL_C void FormatGUID( TDes8 &aGUID ) |
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{ |
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TBuf8<16> copyGUID( aGUID ); |
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TInt i( 0 ); |
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for ( i = 0; i < 4; i++ ) |
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{ |
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copyGUID[i] = aGUID[3-i]; |
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} |
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for ( i = 4; i < 6; i++ ) |
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{ |
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copyGUID[i] = aGUID[9 - i]; |
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} |
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for ( i = 6; i < 8; i++ ) |
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{ |
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copyGUID[i] = aGUID[13 - i]; |
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} |
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for ( i = 8; i < 16 ; i++) |
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{ |
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copyGUID[i] = aGUID[i]; |
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} |
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aGUID.Delete( 0, 32 ); |
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for ( i = 0; i < 16; i++ ) |
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{ |
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aGUID.AppendNumFixedWidthUC( copyGUID[i], EHex, 2 ); |
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} |
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} |
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// ----------------------------------------------------------------------------- |
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// ConvertToInt64 |
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// ----------------------------------------------------------------------------- |
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// |
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LOCAL_C TInt64 ConvertToInt64( TDesC8& aDes ) |
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{ |
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TInt64 num( 0 ); |
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TInt i( 0 ); |
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for ( i = 7 ; i >= 0; i-- ) |
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{ |
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num <<= 8; |
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num |= aDes[i]; |
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} |
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return num; |
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} |
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// ============================ MEMBER FUNCTIONS =============================== |
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// ----------------------------------------------------------------------------- |
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// Default constructor |
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// ----------------------------------------------------------------------------- |
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// |
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DRM::CDrmUtility::CDrmUtility() |
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{ |
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} |
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// ----------------------------------------------------------------------------- |
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// Destructor |
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// ----------------------------------------------------------------------------- |
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// |
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DRM::CDrmUtility::~CDrmUtility() |
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{ |
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delete iOmaBasedAgentName; |
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delete iOmaBasedMimeType; |
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} |
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|
0
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// ----------------------------------------------------------------------------- |
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// CDrmUtility::NewLC |
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// First phase constructor |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C DRM::CDrmUtility* DRM::CDrmUtility::NewLC() |
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{ |
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DRM::CDrmUtility* self( new( ELeave ) CDrmUtility ); |
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CleanupStack::PushL( self ); |
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self->ConstructL(); |
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return self; |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// CDrmUtility::NewL |
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// First phase constructor |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C DRM::CDrmUtility* DRM::CDrmUtility::NewL() |
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{ |
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DRM::CDrmUtility* self( NewLC() ); |
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CleanupStack::Pop(); |
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return self; |
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} |
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|
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void DRM::CDrmUtility::ConstructL() |
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{ |
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TInt err( KErrNone ); |
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|
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TRAP(err, FetchOmaBasedInfoL() ); |
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if( err) |
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{ |
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if( iOmaBasedAgentName ) |
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{ |
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delete iOmaBasedAgentName; |
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} |
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iOmaBasedAgentName = NULL; |
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if( iOmaBasedMimeType ) |
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{ |
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delete iOmaBasedMimeType; |
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} |
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iOmaBasedMimeType = NULL; |
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} |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// CDrmUtility::FetchOmaBasedInfoL |
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// ----------------------------------------------------------------------------- |
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// |
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void DRM::CDrmUtility::FetchOmaBasedInfoL() |
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{ |
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TInt err = KErrNone; |
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CRepository* repository( NULL ); |
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RBuf bOmaBasedAgentName; |
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RBuf bOmaBasedMimeType; |
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|
0
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CleanupClosePushL(bOmaBasedAgentName); |
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CleanupClosePushL(bOmaBasedMimeType); |
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bOmaBasedAgentName.CreateL( KCenRepDataLength ); |
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bOmaBasedMimeType.CreateL( KCenRepDataLength ); |
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|
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TRAP( err, repository = CRepository::NewL( KCRUidOmaBased ) ); |
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if ( !err ) |
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{ |
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CleanupStack::PushL( repository ); |
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180 |
|
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err = repository->Get( KDrmOmaBasedName, bOmaBasedAgentName ); |
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if( !err ) |
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183 |
{ |
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iOmaBasedAgentName = bOmaBasedAgentName.AllocL(); |
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} |
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186 |
|
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err = repository->Get( KOmaBasedMimeType, bOmaBasedMimeType ); |
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if( !err ) |
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189 |
{ |
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iOmaBasedMimeType = CnvUtfConverter::ConvertFromUnicodeToUtf8L( bOmaBasedMimeType ); |
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191 |
} |
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CleanupStack::PopAndDestroy( repository ); |
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193 |
} |
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194 |
|
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CleanupStack::PopAndDestroy(2); |
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|
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User::LeaveIfError( err ); |
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} |
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199 |
|
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200 |
|
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201 |
// ----------------------------------------------------------------------------- |
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202 |
// CDrmUtility::GetDrmInfoL |
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203 |
// ----------------------------------------------------------------------------- |
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204 |
// |
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205 |
EXPORT_C TBool DRM::CDrmUtility::GetDrmInfoL( |
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206 |
RFile& aFileHandle, |
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207 |
TPtrC& aAgent, |
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DRM::TDrmProtectionStatus& aProtected ) const |
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209 |
{ |
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TInt r( KErrNone ); |
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HBufC8* buffer( NULL ); |
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TInt pos( 0 ); |
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RFile file; |
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TBuf8< 32 > header; |
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TInt64 headerSize( 0 ); |
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TBool isDrmFile( EFalse ); |
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TPtr8 headerPtr( NULL, 0 ); |
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218 |
|
0
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aProtected = DRM::EUUnprotected; |
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aAgent.Set( KNullDesC ); |
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221 |
|
0
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CheckFileHandleL( aFileHandle ); |
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User::LeaveIfError( file.Duplicate( aFileHandle ) ); |
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CleanupClosePushL( file ); |
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225 |
|
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User::LeaveIfError( file.Seek( ESeekStart, pos ) ); |
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227 |
|
0
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// Check if the file is an ASF file |
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// To be Checked on runtime wether WM DRM is supporeted or not |
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User::LeaveIfError( file.Read( 0, header, KMinContentLength ) ); |
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if ( header.Length() < KMinContentLength ) |
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232 |
{ |
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User::Leave( KErrArgument ); |
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} |
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235 |
|
0
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236 |
FormatGUID( header ); |
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237 |
|
0
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if ( header == KASFHeaderObject ) |
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239 |
{ |
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// It's ASF, check still whether it's WM DRM protected or not |
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241 |
file.Read( header, KWMHeaderObjectLength ); |
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headerSize = ConvertToInt64( header ); |
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243 |
if( headerSize <= KWMTopLevelHeaderObjectLength || |
0
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244 |
headerSize > KMaxWMHeaderLength ) |
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245 |
{ |
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|
246 |
User::Leave( KErrArgument ); |
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|
247 |
} |
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|
248 |
buffer = HBufC8::NewLC( headerSize ); |
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|
249 |
|
18
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|
250 |
headerPtr.Set( buffer->Des() ); |
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251 |
User::LeaveIfError( file.Read( headerPtr, |
0
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|
252 |
headerSize - ( KMinContentLength + KWMHeaderObjectLength ) ) ); |
18
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|
253 |
|
0
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|
254 |
r = headerPtr.Find( KWrmHeader ); |
18
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|
255 |
if ( r == KErrNotFound ) |
0
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|
256 |
{ |
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|
257 |
aProtected = DRM::EUUnprotected; |
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|
258 |
} |
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|
259 |
else |
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|
260 |
{ |
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|
261 |
isDrmFile = ETrue; |
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Revision: 200949
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|
262 |
aProtected = DRM::EUProtected; |
18
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|
263 |
aAgent.Set( DRM::KDrmWMAgentName ); |
0
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|
264 |
} |
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|
265 |
CleanupStack::PopAndDestroy( buffer ); // buffer |
0
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|
266 |
} |
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|
267 |
else |
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diff
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|
268 |
{ |
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|
269 |
// Check whether it's OMA DRM protected or not |
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|
270 |
buffer = HBufC8::NewLC( KOmaHeaderLength ); |
18
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|
271 |
|
0
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|
272 |
headerPtr.Set( buffer->Des() ); |
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|
273 |
User::LeaveIfError( file.Read( 0, headerPtr )); |
18
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diff
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|
274 |
|
0
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|
275 |
if ( COma1Dcf::IsValidDcf( headerPtr ) ) |
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|
276 |
{ |
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|
277 |
isDrmFile = ETrue; |
18
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|
278 |
aProtected = DRM::EUProtected; |
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|
279 |
aAgent.Set( DRM::KDrmOmaAgentName ); |
0
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|
280 |
} |
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|
281 |
else if ( COma2Dcf::IsValidDcf( headerPtr ) ) |
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|
282 |
{ |
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Revision: 200949
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|
283 |
isDrmFile = ETrue; |
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Revision: 200949
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diff
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|
284 |
_LIT8( KCommonHeadersBox, "ohdr" ); |
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Revision: 200949
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|
285 |
pos = headerPtr.Find( KCommonHeadersBox ); |
18
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0
diff
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|
286 |
|
0
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Revision: 200949
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diff
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|
287 |
// If no box can be found or if there isn't enough data |
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Revision: 200949
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diff
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|
288 |
// set protection as unknown |
18
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|
289 |
if( pos == KErrNotFound || |
0
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Revision: 200949
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diff
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|
290 |
headerPtr.Length() < pos + KOma2EncryptionFieldOffset ) |
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Revision: 200949
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parents:
diff
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|
291 |
{ |
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Revision: 200949
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diff
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|
292 |
aProtected = DRM::EUUnknown; |
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diff
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|
293 |
} |
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Revision: 200949
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parents:
diff
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|
294 |
// If encryption field is 0, then content isn't protected |
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Revision: 200949
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|
295 |
else if ( !headerPtr[pos + KOma2EncryptionFieldOffset] ) |
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Revision: 200949
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diff
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|
296 |
{ |
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Revision: 200949
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parents:
diff
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|
297 |
aProtected = DRM::EUUnprotected; |
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Revision: 200949
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parents:
diff
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|
298 |
} |
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parents:
diff
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|
299 |
else |
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Revision: 200949
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parents:
diff
changeset
|
300 |
{ |
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Revision: 200949
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parents:
diff
changeset
|
301 |
aProtected = DRM::EUProtected; |
18
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diff
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|
302 |
} |
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Revision: 201009
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parents:
0
diff
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|
303 |
aAgent.Set( DRM::KDrmOmaAgentName ); |
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Revision: 201009
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parents:
0
diff
changeset
|
304 |
} |
0
95b198f216e5
Revision: 200949
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parents:
diff
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|
305 |
else if ( (buffer->Des())[0] == 1) |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
306 |
{ |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
307 |
// set the mimetype from the buffer which is in the beginning |
18
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Revision: 201009
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parents:
0
diff
changeset
|
308 |
// starting from byte 3 with the length specified at position 2 |
0
95b198f216e5
Revision: 200949
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diff
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|
309 |
TPtrC8 mimeType( buffer->Des().Mid(3, (buffer->Des())[1]) ); |
18
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Revision: 201009
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0
diff
changeset
|
310 |
if( !mimeType.CompareF( *iOmaBasedMimeType ) ) |
8a03a285ab14
Revision: 201009
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parents:
0
diff
changeset
|
311 |
{ |
0
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
312 |
aAgent.Set( *DRM::CDrmUtility::iOmaBasedAgentName ); |
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313 |
isDrmFile = ETrue; |
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314 |
} |
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315 |
} |
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316 |
CleanupStack::PopAndDestroy( buffer ); |
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317 |
} |
0
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318 |
CleanupStack::PopAndDestroy( &file ); // file |
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319 |
return isDrmFile; |
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320 |
} |
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321 |
|
0
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322 |
// ----------------------------------------------------------------------------- |
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323 |
// CDrmUtility::GetDrmInfoL |
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324 |
// ----------------------------------------------------------------------------- |
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325 |
// |
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326 |
EXPORT_C TBool DRM::CDrmUtility::GetDrmInfoL( |
0
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327 |
const TDesC8& aContent, |
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328 |
TPtrC& aAgent, |
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329 |
DRM::TDrmProtectionStatus& aProtected ) const |
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330 |
{ |
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331 |
TInt r( KErrNone ); |
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332 |
RFile file; |
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333 |
TPtr8 asfPtr( NULL, 0 ); |
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334 |
TBuf8< 32 > asfGuidHex; |
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335 |
TBool isDrmFile( EFalse ); |
18
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336 |
|
0
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337 |
aProtected = DRM::EUUnprotected; |
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338 |
aAgent.Set( KNullDesC ); |
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339 |
|
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340 |
if ( aContent.Length() < KMinContentLength ) |
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341 |
{ |
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342 |
User::Leave( KErrArgument ); |
0
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343 |
} |
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344 |
|
0
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345 |
// Check if the file is an ASF file |
18
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346 |
asfPtr.Set( |
0
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Revision: 200949
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347 |
const_cast<TUint8*>( asfGuidHex.Ptr() ), 0, KMinContentLength * 2 ); |
18
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348 |
asfPtr.Copy( aContent.Left( KMinContentLength ) ); |
0
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349 |
FormatGUID( asfPtr ); |
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350 |
|
0
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351 |
if ( asfPtr == KASFHeaderObject ) |
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352 |
{ |
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353 |
// It's ASF, check still whether it's WM DRM protected or not |
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354 |
r = aContent.Find( KWrmHeader ); |
18
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|
355 |
if ( r == KErrNotFound ) |
0
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356 |
{ |
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357 |
aProtected = DRM::EUUnprotected; |
0
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358 |
} |
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359 |
else |
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360 |
{ |
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361 |
isDrmFile = ETrue; |
18
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362 |
aProtected = DRM::EUProtected; |
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363 |
aAgent.Set( DRM::KDrmWMAgentName ); |
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364 |
} |
0
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|
365 |
} |
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|
366 |
else |
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|
367 |
{ |
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Revision: 200949
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|
368 |
// Check whether it's OMA DRM protected or not. |
18
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|
369 |
if ( ( aContent.Length() >= KMinContentLengthOma1Based ) && |
0
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Revision: 200949
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|
370 |
( COma1Dcf::IsValidDcf( aContent ) ) ) |
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|
371 |
{ |
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|
372 |
isDrmFile = ETrue; |
18
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|
373 |
aProtected = DRM::EUProtected; |
0
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Revision: 200949
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|
374 |
aAgent.Set( DRM::KDrmOmaAgentName ); |
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|
375 |
} |
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Revision: 200949
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376 |
else if ( COma2Dcf::IsValidDcf( aContent ) ) |
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|
377 |
{ |
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Revision: 200949
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|
378 |
isDrmFile = ETrue; |
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Revision: 200949
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|
379 |
_LIT8( KCommonHeadersBox, "ohdr" ); |
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Revision: 200949
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|
380 |
TInt pos( aContent.Find( KCommonHeadersBox ) ); |
18
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|
381 |
|
0
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Revision: 200949
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|
382 |
// If no box can be found or if there isn't enough data |
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Revision: 200949
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|
383 |
// set protection as unknown |
18
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|
384 |
if ( pos == KErrNotFound || |
0
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Revision: 200949
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|
385 |
aContent.Length() < pos + KOma2EncryptionFieldOffset ) |
95b198f216e5
Revision: 200949
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parents:
diff
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|
386 |
{ |
95b198f216e5
Revision: 200949
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parents:
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|
387 |
aProtected = DRM::EUUnknown; |
95b198f216e5
Revision: 200949
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parents:
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|
388 |
} |
18
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Revision: 201009
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parents:
0
diff
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|
389 |
// If encryption field is 0, then content isn't protected |
0
95b198f216e5
Revision: 200949
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|
390 |
else if ( !aContent[pos + KOma2EncryptionFieldOffset] ) |
95b198f216e5
Revision: 200949
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|
391 |
{ |
18
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parents:
0
diff
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|
392 |
aProtected = DRM::EUUnprotected; |
0
95b198f216e5
Revision: 200949
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|
393 |
} |
95b198f216e5
Revision: 200949
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parents:
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|
394 |
else |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
395 |
{ |
18
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Revision: 201009
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parents:
0
diff
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|
396 |
aProtected = DRM::EUProtected; |
8a03a285ab14
Revision: 201009
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parents:
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diff
changeset
|
397 |
} |
8a03a285ab14
Revision: 201009
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parents:
0
diff
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|
398 |
aAgent.Set( DRM::KDrmOmaAgentName ); |
0
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
399 |
} |
95b198f216e5
Revision: 200949
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parents:
diff
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|
400 |
else if ( (aContent)[0] == 1) |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
401 |
{ |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
402 |
// set the mimetype from the buffer which is in the beginning |
18
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Revision: 201009
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
403 |
// starting from byte 3 with the length specified at position 2 |
0
95b198f216e5
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
404 |
TPtrC8 mimeType( aContent.Mid(3, (aContent)[1]) ); |
95b198f216e5
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
405 |
if( !mimeType.CompareF( *iOmaBasedMimeType ) ) |
18
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Revision: 201009
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
406 |
{ |
0
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
407 |
aAgent.Set( *DRM::CDrmUtility::iOmaBasedAgentName ); |
95b198f216e5
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
408 |
isDrmFile = ETrue; |
95b198f216e5
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
409 |
aProtected = DRM::EUProtected; |
95b198f216e5
Revision: 200949
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parents:
diff
changeset
|
410 |
} |
95b198f216e5
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
411 |
} |
95b198f216e5
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
412 |
} |
95b198f216e5
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
413 |
return isDrmFile; |
18
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Revision: 201009
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
414 |
} |
0
95b198f216e5
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
415 |
|
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// ----------------------------------------------------------------------------- |
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// CDrmUtility::IsProtectedL |
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// ----------------------------------------------------------------------------- |
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// |
0
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EXPORT_C TBool DRM::CDrmUtility::IsProtectedL( RFile& aFileHandle ) const |
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{ |
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DRM::TDrmProtectionStatus protection( DRM::EUUnknown ); |
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TPtrC agent( KNullDesC ); |
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TBool isDrmFile( EFalse ); |
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TBool isProtected( EFalse ); |
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426 |
|
0
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isDrmFile = GetDrmInfoL( aFileHandle, agent, protection ); |
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428 |
|
0
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if ( isDrmFile && protection == DRM::EUProtected ) |
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430 |
{ |
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isProtected = ETrue; |
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} |
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return isProtected; |
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} |
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435 |
|
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436 |
|
0
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// ----------------------------------------------------------------------------- |
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// CDrmUtility::IsProtectedL |
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// ----------------------------------------------------------------------------- |
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440 |
// |
0
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EXPORT_C TBool DRM::CDrmUtility::IsProtectedL( const TDesC8& aContent ) const |
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442 |
{ |
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DRM::TDrmProtectionStatus protection( DRM::EUUnknown ); |
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TPtrC agent( KNullDesC ); |
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TBool isDrmFile( EFalse ); |
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TBool isProtected( EFalse ); |
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447 |
|
0
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isDrmFile = GetDrmInfoL( aContent, agent, protection ); |
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449 |
|
0
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if( isDrmFile && protection == DRM::EUProtected ) |
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451 |
{ |
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isProtected = ETrue; |
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} |
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return isProtected; |
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} |
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456 |
|
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457 |
|
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// ----------------------------------------------------------------------------- |
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// CDrmUtility::GetAgentL |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C TBool DRM::CDrmUtility::GetAgentL( |
0
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RFile& aFileHandle, |
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TPtrC& aAgent ) const |
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465 |
{ |
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DRM::TDrmProtectionStatus protection( DRM::EUUnknown ); |
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TBool isDrmFile( EFalse ); |
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|
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isDrmFile = GetDrmInfoL( aFileHandle, aAgent, protection ); |
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|
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return isDrmFile; |
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} |
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|
0
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// ----------------------------------------------------------------------------- |
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// CDrmUtility::GetAgentL |
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// ----------------------------------------------------------------------------- |
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477 |
// |
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478 |
EXPORT_C TBool DRM::CDrmUtility::GetAgentL( |
0
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const TDesC8& aContent, |
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TPtrC& aAgent ) const |
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481 |
{ |
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DRM::TDrmProtectionStatus protection( DRM::EUUnknown ); |
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483 |
TBool isDrmFile( EFalse ); |
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|
484 |
|
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485 |
isDrmFile = GetDrmInfoL( aContent, aAgent, protection ); |
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486 |
|
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487 |
return isDrmFile; |
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488 |
} |
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|
489 |
|
0
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490 |
|
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491 |
// ----------------------------------------------------------------------------- |
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492 |
// CDrmUtility::CheckFileHandlerL |
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493 |
// Checks whether given filehandle is valid if not leaves with KErrArgument |
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494 |
// (other items were commented in a header). |
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495 |
// ----------------------------------------------------------------------------- |
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496 |
// |
0
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497 |
EXPORT_C void DRM::CDrmUtility::CheckFileHandleL( RFile& aFileHandle ) const |
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498 |
{ |
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if ( !aFileHandle.SubSessionHandle() ) |
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500 |
{ |
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501 |
User::Leave( KErrBadHandle ); |
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502 |
} |
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503 |
} |
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504 |
|
0
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505 |
// End of File |