--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/omadrm/drmplugins/drmrecognizer/src/RecDRM.cpp	Thu Dec 17 08:52:27 2009 +0200
@@ -0,0 +1,248 @@
+/*
+* Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "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:
+*
+* Description:  Symbian recognizer for DRM protected files
+*
+*/
+
+
+// INCLUDE FILES
+#include <apmrec.h>
+#include <apmstd.h>
+#include <ecom/ecom.h>
+#include <ecom/implementationproxy.h>
+
+#include "recdrm.h"
+
+#define RECOGNIZE_KEY_CHAIN
+
+// CONSTANTS
+const TUid KUidDRMRecognizer={ 0x101F51F4 };
+
+// Version must be 1 so that it conforms to OMA DRM 1.0 specification
+const TInt KDCFVersionSupported( 1 );
+
+// minimum size of supported mime-type
+const TInt KMinContentTypeLen( 3 );
+
+// maximum amount of buffer space we will ever use
+const TInt KMaxBufferLength=256;
+
+const TInt KDCFHeaderLength=3;
+const TInt KLengthBoxSize = 4;
+const TInt KLengthBoxType = 4;
+const TInt KLengthBoxSize64 = 8;
+const TInt KLengthVersion = 1;
+const TInt KLengthFlags = 3;
+
+_LIT8(KFTypPrefix, "ftyp");
+_LIT8(KODFPrefix, "odcf");
+_LIT8(KRoapTriggerElement, "roap-trigger:roapTrigger"); // before OMA spec CR, ROAP Trigger namespace prefix was roap-trigger 
+_LIT8(KRoapTriggerElement2, "roap:roapTrigger");
+_LIT8(KRoapTriggerType, "application/vnd.oma.drm.roap-trigger+xml");
+
+const TImplementationProxy ImplementationTable[] = 
+	    {
+	    IMPLEMENTATION_PROXY_ENTRY(0x101F6DB8, CApaDRMRecognizer::CreateRecognizerL)
+	    };
+
+#ifdef DRM_OMA2_ENABLED
+TUint32 ReadUint32FromBlock(const TDesC8& aBlock, TInt aOffset)
+    {
+    return (aBlock[aOffset] << 24) +
+        (aBlock[aOffset + 1] << 16) +
+        (aBlock[aOffset + 2] << 8) +
+        aBlock[aOffset + 3];
+    }
+
+TInt ReadIntFromBlock(const TDesC8& aBlock, TInt aOffset)
+    {
+    return (aBlock[aOffset] << 24) +
+        (aBlock[aOffset + 1] << 16) +
+        (aBlock[aOffset + 2] << 8) +
+        aBlock[aOffset + 3];
+    }
+
+TUint16 ReadUint16FromBlock(const TDesC8& aBlock, TInt aOffset)
+    {
+    return ((aBlock[aOffset] << 8) + aBlock[aOffset + 1]);
+    }
+#endif
+
+CApaDRMRecognizer::CApaDRMRecognizer():
+	CApaDataRecognizerType( KUidDRMRecognizer,CApaDataRecognizerType::ENormal )
+{
+	
+	iCountDataTypes = 0;
+	return;
+}
+
+CApaDRMRecognizer::~CApaDRMRecognizer()
+{
+}
+
+
+CApaDataRecognizerType* CApaDRMRecognizer::CreateRecognizerL()
+{
+	return new (ELeave) CApaDRMRecognizer ();
+}
+	
+
+TUint CApaDRMRecognizer::PreferredBufSize()
+{
+	return KMaxBufferLength;
+}
+
+#ifdef _DEBUG
+TDataType CApaDRMRecognizer::SupportedDataTypeL( TInt aIndex ) const
+#else
+TDataType CApaDRMRecognizer::SupportedDataTypeL( TInt /*aIndex*/ ) const
+#endif
+{
+__ASSERT_DEBUG( aIndex >= 0 && aIndex < iCountDataTypes, User::Invariant() );
+	return TDataType( _L8("application/vdn.omd.drm.content") ); // this should never be run
+}
+
+void CApaDRMRecognizer::DoRecognizeL( const TDesC& aName, const TDesC8& aBuffer )
+{
+	if ( aBuffer.Size() < 3) 
+        {
+        return;
+        }
+	
+#ifdef RECOGNIZE_KEY_CHAIN	
+	// Recognize device key chain
+	if ( aName.Length() > 3 && aName.Right(4).CompareF(_L(".dkc")) == 0)
+        {
+        iConfidence = ECertain;
+        iDataType = TDataType( _L8("application/x-device-key-chain") );
+        return;
+        }
+#endif        
+	
+#ifdef DRM_OMA2_ENABLED
+	// Recognize ROAP Trigger
+	if ( RecognizeRoapTrigger( aBuffer ) )
+        {
+        return;
+        }
+	
+	// Recognize DCFv2    
+	if ( RecognizeODF( aBuffer ) )
+        {
+        return;
+        }   
+#endif	
+	// Recognize DCFv1
+	TUint8 version = aBuffer[0];
+	TUint8 contentTypeLen = aBuffer[1];
+	TUint8 contentURILen = aBuffer[2];
+
+	if ( contentTypeLen < KMinContentTypeLen || contentURILen == 0 ) 
+	{
+		return;
+	}
+	if ( version != KDCFVersionSupported ) 
+	{
+		return;
+	}
+
+	// Too little data received
+	if ( aBuffer.Size() < ( contentTypeLen + KDCFHeaderLength ) ) 
+	{
+		return;
+	}
+
+	TPtrC8 mimeType = aBuffer.Mid( KDCFHeaderLength, contentTypeLen );
+	if ( mimeType.Locate( '/' ) != KErrNotFound )
+	{
+		iConfidence = ECertain;
+		iDataType=TDataType( mimeType );	
+	}
+	
+	
+	return;
+}
+
+#ifdef DRM_OMA2_ENABLED
+TBool CApaDRMRecognizer::RecognizeRoapTrigger( const TDesC8& aBuffer )
+{
+        if ( aBuffer.FindF( KRoapTriggerElement() ) != KErrNotFound
+             || aBuffer.FindF( KRoapTriggerElement2() ) != KErrNotFound )
+        {
+            iConfidence = ECertain;
+            iDataType=TDataType( KRoapTriggerType() );
+            return ETrue;
+        }
+	return EFalse;
+}
+
+TBool CApaDRMRecognizer::RecognizeODF( const TDesC8& aBuffer )
+{
+	if ( aBuffer.Size() < 24 ) return EFalse;
+	TPtrC8 ftypPrefix = aBuffer.Mid( 4, KFTypPrefix().Length() );
+	if ( KFTypPrefix().CompareF( ftypPrefix ) == KErrNone )
+	{
+		TPtrC8 odfPrefix = aBuffer.Mid( 8, KODFPrefix().Length() );
+		if ( KODFPrefix().CompareF( odfPrefix ) == KErrNone )
+		{
+			TBuf8<4> buffer;
+    		TUint32 size;
+    		TPtr8 ptr(NULL, 0);
+    		TUint32 offset(20);
+    
+    		// ODRM box header
+    		buffer.Zero();
+    		buffer.Copy( aBuffer.Mid( offset, 4 ));
+    		size = ReadUint32FromBlock( buffer, 0 );
+    		offset += KLengthBoxSize + KLengthBoxType + KLengthVersion + KLengthFlags;
+    		
+    		if (size == 1)
+        	{
+        		offset += KLengthBoxSize64;
+        	}
+    		if ( aBuffer.Size() < offset+4 ) return EFalse;
+    		
+    		// Discrete headers box header
+    		buffer.Zero();
+    		buffer.Copy( aBuffer.Mid( offset, 4 ));
+    		size = ReadUint32FromBlock( buffer, 0 );
+    		offset += KLengthBoxSize + KLengthBoxType + KLengthVersion + KLengthFlags;
+    		if ( size == 1 )
+        	{
+        		offset += KLengthBoxSize64;
+        	}
+    		if ( aBuffer.Size() < offset+1 ) return EFalse;
+    		
+    		// Content type
+    		buffer.Zero();
+    		buffer.Copy( aBuffer.Mid( offset, 1 ));
+    		if ( aBuffer.Size() < offset + 1 + buffer[0] ) return EFalse;
+    		TPtrC8 mimeType = aBuffer.Mid( offset+1, buffer[0] );
+   			
+   			iConfidence = ECertain;
+			iDataType=TDataType( mimeType );
+			return ETrue;
+		}
+		
+	}
+	return EFalse;
+}
+#endif
+
+EXPORT_C const TImplementationProxy* ImplementationGroupProxy(TInt& aTableCount)
+    {
+    aTableCount = sizeof(ImplementationTable) / sizeof(TImplementationProxy);
+    return ImplementationTable;
+    }
+