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The Windows Access Control Model Part 4

, 7 Sep 2005 147.8K 5.6K 96
The final article in the access control series presents a guide to the access control editor and its associated ISecurityInformation interface.
filepermsbox-1_11.zip
Filepermsbox-1.11.exe
filepermsbox111.zip
release
FilePermsBox.dll
FilePermsBox.exe
FilePermsBox.Interop.dll
filepermsboxsrc.zip
Frontend
FilePermsBox.exe.manifest
InnoForm.isf
SetupFpms.iss
NetWrapper
FilePermsBox.Interop.tlb
FPermBoxKey.snk
FilePermsBox.Interop.dll
LockKey.ico
FilePermsBoxDLL
165.avi
FilePermsDll.def
FilePermsDll.manifest
FilePermsDll64.def
/**
*	This code is by OShah. all code will have the following licence.
*	Copyright Shexec32. All code bears the following licence:
**/

/**
*	Copyright Shexec32 2004-2005. All rights reserved.
*
*	THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
*	ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED
*	TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
*	PARTICULAR PURPOSE.
**/
#ifndef RAII_H
#define RAII_H
#pragma once


template<class DatType>
class sized_array
{/**	A simplified scoped_array class from Boost. This has copy semantics. For Anti-hacking technologies, we're
*	going to Zero all memory allocated. For STL compatibility, we are going to add a copy consructor and equality
*	operator. This makes it act more like a C99 VLA rather than an auto_ptr.
*	Due to the lack of export keyword support in many C++ compilers, I'll need to define the shared class here.
**/
protected:
	size_t Size;
	DatType * OurPtr;	/* The scope of this variable is determined by the object. */

	void CopyHelper(const std::basic_string<TCHAR> &OldClass)
	{
		/* always resize. */
		if(this->get_Size() < OldClass.size() + 1)
		{
			this->reset(OldClass.size() + 1);
		}
#ifndef _SCL_INSECURE_DEPRECATE
		OldClass.copy(this->get(), OldClass.size(), 0);
#else
		OldClass._Copy_s(this->get(), this->get_Size(), OldClass.size(), 0);
#endif /* _SCL_INSECURE_DEPRECATE */
	};

	void DoCopy(DatType *TheirPtr, size_t TheirSize)
	{
		std::copy<const DatType *, DatType *>(TheirPtr, TheirPtr + TheirSize, this->OurPtr);
	};

public:
	explicit sized_array (size_t len = 1) : OurPtr(NULL), Size(len)
	{
		if(len != 0)
		{
			this->OurPtr = new DatType[len];
			SecureZeroMemory(OurPtr, len * sizeof(DatType));
		}
	};

	sized_array(const sized_array &OldClass) : Size(OldClass.Size), OurPtr(new DatType[OldClass.Size])
	{
		DoCopy(OldClass.OurPtr, OldClass.Size);
		//std::copy<const DatType *, DatType *>(OldClass.OurPtr, OldClass.OurPtr + Size, OurPtr);
	};

	void reset(size_t len = 1)
	{/* Also called release and reallocate. */
		delete [] OurPtr;
		OurPtr = new DatType[len];
		SecureZeroMemory(OurPtr, len * sizeof(DatType));

		Size = len;
	};


	DatType *get(void) const
	{/* Accessor. Only get is currently implemented. */
		return OurPtr;
	};

	size_t get_Size(void) const
	{/* For Convenience */
		return Size;
	};


	sized_array &operator=(const sized_array &OldClass)
	{/* This equality may be required by CObjSecurity. */
		if(this==&OldClass) return *this;

		Size = OldClass.Size;
		this->reset(Size);
		DoCopy(OldClass.OurPtr, Size);
		return *this;
	};

	sized_array(const std::basic_string<DatType> &OldClass) : Size(0), OurPtr(NULL)
	{/* Copy contructor for strings */
		this->CopyHelper(OldClass);
	};

	sized_array &operator=(const std::basic_string<DatType> &OldClass)
	{
		this->CopyHelper(OldClass);
		return *this;
	};

	virtual ~sized_array()
	{
		delete [] OurPtr;
		OurPtr = NULL;
	};
};

#endif /* RAII_H */

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About the Author

oshah
Web Developer
United States United States
Mr. Shah is a reclusive C++/C# developer lurking somewhere in the depths of the city of London. He learnt physics at Kings' College London and obtained a Master in Science there. Having earned an MCAD, he teeters on the brink of transitioning from C++ to C#, unsure of which language to jump to. Fortunately, he also knows how to use .NET interop to merge code between the two languages (which means he won't have to make the choice anytime soon).

His interests (apart from programming) are walking, football (the real one!), philosophy, history, retro-gaming, strategy gaming, and any good game in general.

He maintains a website / blog / FAQ / junk at shexec32.serveftp.net, where he places the best answers he's written to the questions you've asked. If you can find him, maybe you can hire Mr. Shah to help you with anything C++[/CLI]/C#/.NET related Smile | :) .

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