C++內嵌彙編代碼，簡單檔案加密

標籤：

#include <iostream>#include <fstream>using namespace std;int main(int argc, char* argv[]){    if(argc < 3){        cout<<"Usage: Project infile outfile"<<endl;        return -1;    }    const int BUFSIZE = 2000;    char buf[BUFSIZE];    unsigned int count;    // char count    unsigned int encryptMask;    cout<<"Encryption code[0-255]?";    cin>>encryptMask;    if(encryptMask<0 || encryptMask > 255){        cout<<"between 0 and 255."<<endl;        return -1;    }        unsigned char encryptCode = (unsigned char)encryptMask;    ifstream infile(argv[1],ios::binary);    ofstream outfile(argv[2],ios::binary);    cout << "Reading "<<argv[1]<<"and createing"<<argv[2]<<endl;    while(!infile.eof()){        infile.read(buf,BUFSIZE);        count = infile.gcount();        if(count==0)break;        __asm{            lea esi, buf            mov ecx,count            mov al,encryptCodeL1:            xor [esi],al            inc esi            loop L1        }        outfile.write(buf,count);    }    infile.close();    outfile.close();    return  0;}

 

C++內嵌彙編代碼，簡單檔案加密