Linux c++ 隐藏 cin 输入 - William

william 收录于 Programming

2021-11-20 约 400 字预计阅读 1 分钟

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本文最后更新于 2021-11-20，文中内容可能已过时。

通过隐藏实现，可以很好的避免执行命令被监控到。

mymain

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#include <iostream>
#include <string>
#include <termios.h>
#include <unistd.h>

using namespace std;

int main()
{
    termios oldt;
    tcgetattr(STDIN_FILENO, &oldt);
    termios newt = oldt;
    newt.c_lflag &= ~ECHO;
    tcsetattr(STDIN_FILENO, TCSANOW, &newt);

    string passwd;
    getline(cin, passwd);

    cout << passwd << endl;
    return 0;
}//main

myssh

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#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <string>
#include <iostream>
#include <termios.h>

using namespace std;

int main(void)
{
    // -------------------------------------------------------------------
    termios oldt;
    tcgetattr(STDIN_FILENO, &oldt);
    termios newt = oldt;
    newt.c_lflag &= ~ECHO;
    tcsetattr(STDIN_FILENO, TCSANOW, &newt);

    std::string passwd;
    std::cout << "welcome: ";
    getline(cin, passwd);
    std::string answer;
	for (const auto& e : {"************"})
		answer += e;
    if (passwd != answer)
    {
        std::cout << "Bye!" << std::endl;
        return -1;
    }
    std::cout << std::endl;
    tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
    // -------------------------------------------------------------------

	std::string cmd;

    // std::cout << cmd << std::endl;
    system(cmd.c_str());
}

mysync

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#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <string>
#include <iostream>
#include <termios.h>

using namespace std;
int main(int argc, char* argv[])
{
    // -------------------------------------------------------------------
    termios oldt;
    tcgetattr(STDIN_FILENO, &oldt);
    termios newt = oldt;
    newt.c_lflag &= ~ECHO;
    tcsetattr(STDIN_FILENO, TCSANOW, &newt);

    std::string passwd;
    std::cout << "welcome: ";
    getline(cin, passwd);
    std::string answer;
	for (const auto& e : {"************"})
		answer += e;
    if (passwd != answer)
    {
        std::cout << "Bye!" << std::endl;
        return -1;
    }
    std::cout << std::endl;
    tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
    // -------------------------------------------------------------------

    std::string srcpath;
    std::cout << "srcpath: ";
    std::cin >> srcpath;

    std::string destpath;
    std::cout << "destpath: ";
    std::cin >> destpath;
    std::cout << std::endl;

    std::string cmd;

    system(cmd.c_str());
}

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