从 std::cin 读取密码

Reading a password from std::cin(从 std::cin 读取密码)

问题描述

我需要从标准输入中读取密码并希望 std::cin 不回显用户输入的字符...

I need to read a password from standard input and wanted std::cin not to echo the characters typed by the user...

如何禁用 std::cin 的回声?

How can I disable the echo from std::cin?

这是我目前使用的代码:

here is the code that I'm currently using:

string passwd;
cout << "Enter the password: ";
getline( cin, passwd );

我正在寻找一种与操作系统无关的方式来做到这一点.此处 可以在 Windows 和 *nix 中执行此操作.

I'm looking for a OS agnostic way to do this. Here there are ways to do this in both Windows and *nix.

推荐答案

@wrang-wrang 答案非常好，但没有满足我的需求，这就是我的最终代码(基于 this) 看起来像:

@wrang-wrang answer was really good, but did not fulfill my needs, this is what my final code (which was based on this) look like:

#ifdef WIN32
#include <windows.h>
#else
#include <termios.h>
#include <unistd.h>
#endif

void SetStdinEcho(bool enable = true)
{
#ifdef WIN32
    HANDLE hStdin = GetStdHandle(STD_INPUT_HANDLE); 
    DWORD mode;
    GetConsoleMode(hStdin, &mode);

    if( !enable )
        mode &= ~ENABLE_ECHO_INPUT;
    else
        mode |= ENABLE_ECHO_INPUT;

    SetConsoleMode(hStdin, mode );

#else
    struct termios tty;
    tcgetattr(STDIN_FILENO, &tty);
    if( !enable )
        tty.c_lflag &= ~ECHO;
    else
        tty.c_lflag |= ECHO;

    (void) tcsetattr(STDIN_FILENO, TCSANOW, &tty);
#endif
}

示例用法:

#include <iostream>
#include <string>

int main()
{
    SetStdinEcho(false);

    std::string password;
    std::cin >> password;

    SetStdinEcho(true);

    std::cout << password << std::endl;

    return 0;
}

这篇关于从 std::cin 读取密码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！