密码学——凯撒加密

古典加密方案，通过对字符简单的增加x，来进行加密。

免杀使用的时候，顺手可以加个亦或进去，增加点复杂度。

#pragma once

#include<stdio.h>

void Caesar_Encryption(unsigned char *strInput,int nLength, int nOffset1, int nOffset2) {
	unsigned char* p = strInput;

	for (int i = 0; i < nLength; i++) {
		//凯撒加密
		*p = *p + nOffset1;
		//亦或加密
		*p = *p ^ nOffset2;
		p++;
	
	}
}

void Caesar_Decryption(unsigned char* strInput, int nLength, int nOffset1, int nOffset2) {
	unsigned char* p = strInput;

	for (int i = 0; i < nLength; i++) {
		//亦或加密
		*p = *p ^ nOffset2;
		//凯撒加密
		*p = *p - nOffset1;
		p++;
	}
}