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A File Checksum Shell Menu Extension DLL

, 23 May 2008 LGPL3
Create a File Checksum Shell Menu Extension using ATL and Crypto++
CtxCreateHash
CtxCreateHash
CreateHash.rgs
CtxCreateHash.def
CtxCreateHash.rgs
CtxCreateHash.vcproj.8.00.old
CtxCreateHashps.def
CtxCreateHashPS.vcproj.8.00.old
CtxCreateHash.sln.old
CreateHash.rgs
CtxCreateHash.aps
CtxCreateHash.def
CtxCreateHash.rgs
CtxCreateHashps.def
CtxCreateHash.dll
CtxVerifyHash
CtxVerifyHash
CtxVerifyHash.def
CtxVerifyHash.rgs
CtxVerifyHash.vcproj.8.00.old
CtxVerifyHashps.def
CtxVerifyHashPS.vcproj.8.00.old
VerifyHash.rgs
CtxVerifyHash.sln.old
CtxVerifyHash.aps
CtxVerifyHash.def
CtxVerifyHash.rgs
CtxVerifyHashps.def
VerifyHash.rgs
CtxVerifyHash.dll
Sample 1
Test 1.dsp
Test 1.dsw
Sample 2
Test 2.dsp
Test 2.dsw
Sample 3
Test 3.dsp
Test 3.dsw
Sample 4
Test 4.dsp
Test 4.dsw
Sample 5
CtxTest.def
CtxTest.dsp
CtxTest.dsw
CtxTestps.def
CtxTestps.mk
MenuItem.rgs
// misc.cpp - written and placed in the public domain by Wei Dai

#include "pch.h"

#ifndef CRYPTOPP_IMPORTS

#include "misc.h"
#include "words.h"
#include <new>

NAMESPACE_BEGIN(CryptoPP)

void xorbuf(byte *buf, const byte *mask, unsigned int count)
{
	if (((size_t)buf | (size_t)mask | count) % WORD_SIZE == 0)
		XorWords((word *)buf, (const word *)mask, count/WORD_SIZE);
	else
	{
		for (unsigned int i=0; i<count; i++)
			buf[i] ^= mask[i];
	}
}

void xorbuf(byte *output, const byte *input, const byte *mask, unsigned int count)
{
	if (((size_t)output | (size_t)input | (size_t)mask | count) % WORD_SIZE == 0)
		XorWords((word *)output, (const word *)input, (const word *)mask, count/WORD_SIZE);
	else
	{
		for (unsigned int i=0; i<count; i++)
			output[i] = input[i] ^ mask[i];
	}
}

unsigned int Parity(unsigned long value)
{
	for (unsigned int i=8*sizeof(value)/2; i>0; i/=2)
		value ^= value >> i;
	return (unsigned int)value&1;
}

unsigned int BytePrecision(unsigned long value)
{
	unsigned int i;
	for (i=sizeof(value); i; --i)
		if (value >> (i-1)*8)
			break;

	return i;
}

unsigned int BitPrecision(unsigned long value)
{
	if (!value)
		return 0;

	unsigned int l=0, h=8*sizeof(value);

	while (h-l > 1)
	{
		unsigned int t = (l+h)/2;
		if (value >> t)
			l = t;
		else
			h = t;
	}

	return h;
}

unsigned long Crop(unsigned long value, unsigned int size)
{
	if (size < 8*sizeof(value))
    	return (value & ((1L << size) - 1));
	else
		return value;
}

#if !(defined(_MSC_VER) && (_MSC_VER < 1300))
using std::new_handler;
using std::set_new_handler;
#endif

void CallNewHandler()
{
	new_handler newHandler = set_new_handler(NULL);
	if (newHandler)
		set_new_handler(newHandler);

	if (newHandler)
		newHandler();
	else
		throw std::bad_alloc();
}

NAMESPACE_END

#endif

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License

This article, along with any associated source code and files, is licensed under The GNU Lesser General Public License (LGPLv3)

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About the Author

Jeffrey Walton
Systems / Hardware Administrator
United States United States
No Biography provided

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