How can I get password input without showing user input?

Question

How can I get password input without showing user input?

fn main() {
    println!("Type Your Password");

    // I want to hide input here, and do not know how
    let input = std::old_io::stdin().read_line().ok().expect("Failed to read line");

    println!("{}", input);
}

Answer 1

Update: you can use the rpassword crate. Quoting from the README:

Add the rpassword crate to your Cargo.toml:

[dependencies]
rpassword = "0.0.4"

Then use the read_password() function:

extern crate rpassword;
    
use rpassword::read_password;
use std::io::Write;
    
fn main() {
    print!("Type a password: ");
    std::io::stdout().flush().unwrap();
    let password = read_password().unwrap();
    println!("The password is: '{}'", password);
}

---

Old answer

I suspect your best bet is calling some C functions from rust: either getpass (3) or its recommended alternatives (see Getting a password in C without using getpass). The tricky thing is that it differs by platform, of course (if you get it working, it'd be handy as a crate).

Depending on your requirements, you could also try using ncurses-rs (crate "ncurses"); I haven't tested it but it looks like example 2 might demo turning off echoing input.