/**
 * 加密/解密接口
 */
#include "stdafx.h"
#include <stdio.h>


/**
 * 解密報文  
 */
void decrypt(unsigned char *data,int len)
{
	register int i;

	for (i=0; i<len; i++)
	{
		unsigned char o = data[i];
		unsigned char n;

		n = ((o & 1) << 1);

		n |= ((o & 2) << 6);

		n |= ((o & 4) << 4);

		n |= ((o & 8) << 2);

		n |= ((o & 0x10) >> 2);

		n |= ((o & 0x20) >> 2);

		n |= ((o & 0x40) >> 2);

		n |= ((o & 0x80) >> 7);

		data[i] = n;
	}
}


/**
 * 加密報文  
 */
void encrypt(unsigned char *data,int len)
{
	register int i;

	for (i=0; i<len; i++)
	{
		unsigned char o = data[i];
		unsigned char n;

		n = ((o & 1) << 7);

		n |= ((o & 2) >> 1);

		n |= ((o & 4) << 2);

		n |= ((o & 8) << 2);

		n |= ((o & 0x10) << 2);

		n |= ((o & 0x20) >> 2);

		n |= ((o & 0x40) >> 4);

		n |= ((o & 0x80) >> 6);

		data[i] = n;
	}
}