entryappview.h

Simple database program

/*
 ============================================================================
 Name		 : EntryAppView.h
 Author	 	 : Sazzad and Mozaharul
 Copyright   : @Encryption 2008
 Description : Declares view class for application.
 ============================================================================
 */

#ifndef __ENTRYAPPVIEW_h__
#define __ENTRYAPPVIEW_h__

// INCLUDES
#include <coecntrl.h>
#include <aknsettingitemlist.h> 

#include <d32dbms.h> 
#include <badesca.h>
#include <f32file.h> 
#include <e32std.h>
#include <cryptosymmetric.h>
#include <cryptopadding.h>


class TDbItem
{
    public:
    	TDbItem(): iId(-1){};
    public:
        TInt 		iId;
        TBuf<160>		iSms;
};


// CLASS DECLARATION
class CEntryAppView : public CCoeControl
	{
public:
	// New methods
	/**
	*AddView. 
	*Call the GetTextL() function to get the SMS text from the text dialog
	*/
	void AddView();
	
	/**
	*DataView.
	*To raed the data from database to call ConForReadDbItemsL()
	*/
	void DataView();

	/**
	*GetTextL.
	*Create a Text dialog box to write text
	*/
	TInt GetTextL();

	/**
	*EncryptMsg.
	*Perform the encryption operation on text
	* @returns a 16 bit descriptor containing encrypted data
	*/
	const TDes& EncryptMsg();

	/**
	*DecryptMsg.
	* Perform the decryption operation on text
	* @param the encryted text		
	* @returns the plain text
	*/
	const TDes& DecryptMsg(const TDes &KData);

	/**
	* CreateDescInstance.
	* Create the instances for data encryption and decryption
	*/
	void CreateDescInstance();

	/**
	* DeleteDescInstance.
	* Clean the stack that containing the encryption and decryption instances
	*/
	void DeleteDescInstance();

	/**
	* CreateDb.
	* To create or open the database
	*/
	void CreateDb();

	/**
	* SaveToDatabaseL.
	* save the encrypted data to the database
	* @param aIndex is the index of the database		
	*/
	void SaveToDatabaseL(TInt& aIndex);

	/**
	* ConForReadDbItemsL.
	* connection to the database to read data
	*/
	void ConForReadDbItemsL();
	
	/**
	* ReadDataL.
	* Read the data from database with decryption
	*/
	void ReadDataL();	

	/**
	 * NewL.
	 * Two-phased constructor.
	 * Create a CEntryAppView object, which will draw itself to aRect.
	 * @param aRect The rectangle this view will be drawn to.
	 * @return a pointer to the created instance of CEntryAppView.
	 */
	static CEntryAppView* NewL(const TRect& aRect);

	/**
	 * NewLC.
	 * Two-phased constructor.
	 * Create a CEntryAppView object, which will draw itself
	 * to aRect.
	 * @param aRect Rectangle this view will be drawn to.
	 * @return A pointer to the created instance of CEntryAppView.
	 */
	static CEntryAppView* NewLC(const TRect& aRect);

	/**
	 * ~CEntryAppView
	 * Virtual Destructor.
	 */
	virtual ~CEntryAppView();

public:
	// Functions from base classes

	/**
	 * From CCoeControl, Draw
	 * Draw this CEntryAppView to the screen.
	 * @param aRect the rectangle of this view that needs updating
	 */
	void Draw(const TRect& aRect) const;

	/**
	 * From CoeControl, SizeChanged.
	 * Called by framework when the view size is changed.
	 */
	virtual void SizeChanged();
	
private:
	// Constructors
	/**
	 * CreateTableL
	 * Create a database table
	 * @param aDatabase read the database
	 */
	void CreateTableL(RDbDatabase& aDatabase);

	TBuf<160> SMSText;
	RDbNamedDatabase iItemsDatabase;
	RFs iFsSession;
	TInt 		iIndex;
	
	CDESEncryptor* iTrans;
	TInt KDESBlockSize;
	CDESDecryptor* iDec;
	CPaddingPKCS7* pad2;
	CBufferedTransformation*  iDecbuf;
	CPaddingPKCS7* pad;
	CBufferedTransformation* iBfrd;
	TBuf8<160> deskey;
	TBuf8<160> indata,encdata;
	
	//RArray<TEntryItem>&	aItemArray;
private:
	// Constructors
	/**
	 * ConstructL
	 * 2nd phase constructor.
	 * Perform the second phase construction of a
	 * CEntryAppView object.
	 * @param aRect The rectangle this view will be drawn to.
	 */
	void ConstructL(const TRect& aRect);

	/**
	 * CEntryAppView.
	 * C++ default constructor.
	 */
	CEntryAppView();

	};

#endif // __ENTRYAPPVIEW_h__
// End of File