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Windows: Support direct password drag-n-drop from external applications (e.g. KeePass) which is more secure than using clipboard.

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This commit is contained in:
Mounir IDRASSI
2020-07-06 18:00:25 +02:00
parent b54729de48
commit ff391d9a6a
5 changed files with 597 additions and 2 deletions
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55
src/Common/Dlgcode.h
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@@ -691,6 +691,61 @@ typedef void (CALLBACK* WaitThreadProc)(void* pArg, HWND hWaitDlg);
void BringToForeground(HWND hWnd);
void ShowWaitDialog(HWND hwnd, BOOL bUseHwndAsParent, WaitThreadProc callback, void* pArg);
// classes used to implement support for password drag-n-drop from KeePass Password Safe
// Implementation based the following source code with many modifications to fix isses and add features
// URL: https://www.codeguru.com/cpp/misc/misc/draganddrop/article.php/c349/Drag-And-Drop-between-Window-Controls.htm
interface GenericDropTarget : public IDropTarget
{
public:
GenericDropTarget(CLIPFORMAT* pFormats, size_t count);
~GenericDropTarget();
// basic IUnknown stuff
HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, void ** ppvObject);
ULONG STDMETHODCALLTYPE AddRef(void);
ULONG STDMETHODCALLTYPE Release(void);
HRESULT STDMETHODCALLTYPE DragEnter(struct IDataObject *,unsigned long,struct _POINTL,unsigned long *);
HRESULT STDMETHODCALLTYPE DragOver(unsigned long,struct _POINTL,unsigned long *);
HRESULT STDMETHODCALLTYPE DragLeave(void);
HRESULT STDMETHODCALLTYPE Drop(struct IDataObject *,unsigned long,struct _POINTL,unsigned long *);
// called by parents
BOOL Register(HWND hWnd);
void Revoke();
// call parent we have goodies
virtual void GotDrop(CLIPFORMAT format);
virtual DWORD GotDrag(void);
virtual void GotLeave(void);
virtual DWORD GotEnter(void);
public:
BYTE *m_Data;
POINT m_DropPoint;
DWORD m_KeyState;
protected:
HWND m_DropTargetWnd;
std::vector<CLIPFORMAT> m_SupportedFormat;
volatile LONG m_dwRefCount;
};
class PasswordEditDropTarget : public GenericDropTarget
{
public:
PasswordEditDropTarget();
// called by child we have drop
void GotDrop(CLIPFORMAT format);
DWORD GotDrag(void);
void GotLeave(void);
DWORD GotEnter(void);
};
#endif // __cplusplus
#endif // TC_HEADER_DLGCODE