/*
稍稍强于普通的异或加密算法,可用于简单加密
扩展思路1:使用16/32位的uKey
扩展思路2:随机化加密起始点
*/
// 加密
void* Encrypt(void *pIn, void *pOut, DWORD nLen, unsigned char uKey)
{
memcpy(pOut, pIn, nLen);
int i = nLen - 1;
((char*)pOut)[i] ^= uKey;
for (; i>0; i--)
{
((char*)pOut)[i - 1] ^= ((char*)pOut)[i];
}
return pOut;
}
// 解密
void* Decrypt(void *pIn, void *pOut, DWORD nLen, unsigned char uKey)
{
memcpy(pOut, pIn, nLen);
for (int i = 0; i<nLen - 1; i++)
{
((char*)pOut)[i] ^= ((char*)pOut)[i + 1];
}
((char*)pOut)[nLen - 1] ^= uKey;
return pOut;
}