basecom.h

使用visual studio 2005 开发的开源文件、磁盘加密软件。这是6.1a版。加密自己资料的好工具。也是学习的优秀范本。结成了众多加密算法。

/*
 Copyright (c) 2007-2008 TrueCrypt Foundation. All rights reserved.

 Governed by the TrueCrypt License 2.6 the full text of which is contained
 in the file License.txt included in TrueCrypt binary and source code
 distribution packages.
*/

#ifndef TC_HEADER_BASE_COM
#define TC_HEADER_BASE_COM

#include <guiddef.h>

template <class TClass>
class TrueCryptFactory : public IClassFactory
{

public:
	TrueCryptFactory (DWORD messageThreadId) : 
		RefCount (1), ServerLockCount (0), MessageThreadId (messageThreadId) { }

	~TrueCryptFactory () { }
	
	virtual ULONG STDMETHODCALLTYPE AddRef ()
	{
		return InterlockedIncrement (&RefCount) - 1;
	}

	virtual ULONG STDMETHODCALLTYPE Release ()
	{
		ULONG r = InterlockedDecrement (&RefCount) + 1;

		if (r == 0)
			delete this;

		return r;
	}

	virtual HRESULT STDMETHODCALLTYPE QueryInterface (REFIID riid, void **ppvObject)
	{
		if (riid == IID_IUnknown || riid == IID_IClassFactory)
			*ppvObject = this;
		else
		{
			*ppvObject = NULL;
			return E_NOINTERFACE;
		}

		AddRef ();
		return S_OK;
	}
        
	virtual HRESULT STDMETHODCALLTYPE CreateInstance (IUnknown *pUnkOuter, REFIID riid, void **ppvObject)
	{
		if (pUnkOuter != NULL)
			return CLASS_E_NOAGGREGATION;

		TClass *tc = new TClass (MessageThreadId);
		if (tc == NULL)
			return E_OUTOFMEMORY;

		HRESULT hr = tc->QueryInterface (riid, ppvObject);

		if (hr)
			delete tc;

		return hr;
	}

	virtual HRESULT STDMETHODCALLTYPE LockServer (BOOL fLock)
	{
		if (fLock)
		{
			InterlockedIncrement (&ServerLockCount);
		}
		else
		{
			if (!InterlockedDecrement (&ServerLockCount))
				PostThreadMessage (MessageThreadId, WM_APP, 0, 0);
		}

		return S_OK;
	}

	virtual bool IsServerLocked ()
	{
		return ServerLockCount > 0;
	}

protected:
	DWORD MessageThreadId;
	LONG RefCount;
	LONG ServerLockCount;
};


class BaseCom
{
public:
	static DWORD CallDriver (DWORD ioctl, BSTR input, BSTR *output);
	static BOOL IsPagingFileActive (BOOL checkNonWindowsPartitionsOnly);
	static DWORD ReadWriteFile (BOOL write, BOOL device, BSTR filePath, BSTR *bufferBstr, unsigned __int64 offset, unsigned __int32 size, DWORD *sizeDone);
	static DWORD RegisterFilterDriver (BOOL registerDriver, BOOL volumeClass);
	static DWORD SetDriverServiceStartType (DWORD startType);
	static DWORD WriteLocalMachineRegistryDwordValue (BSTR keyPath, BSTR valueName, DWORD value);
};


BOOL ComGetInstanceBase (HWND hWnd, REFCLSID clsid, REFIID iid, void **tcServer);
HRESULT CreateElevatedComObject (HWND hwnd, REFGUID guid, REFIID iid, void **ppv);

#endif // TC_HEADER_BASE_COM