readpassphrase_3

Function readpassphrase

Source 
pub fn readpassphrase<'a>(
    prompt: &CStr,
    buf: &'a mut [u8],
    flags: RppFlags,
) -> Result<&'a str, Error>
Expand description

Reads a passphrase using readpassphrase(3).

This function reads a passphrase of up to buf.len() - 1 bytes. If the entered passphrase is longer, it will be truncated.

§Security

The passed buffer might contain sensitive data, even if this function returns an error (for example, if the contents are not valid UTF-8.) It is often considered good practice to zero this memory after you’re done with it, for example by using zeroize:

use zeroize::Zeroizing;
let mut buf = Zeroizing::new(vec![0u8; PASSWORD_LEN]);
let pass = readpassphrase(c"Pass: ", &mut buf, RppFlags::default())?;
Examples found in repository?
examples/inplace.rs (lines 18-22)
13fn main() {
14    #[allow(unused_mut)]
15    let mut buf = vec![0u8; 256];
16    #[cfg(feature = "zeroize")]
17    let mut buf = Zeroizing::new(buf);
18    let password = readpassphrase(
19        c"Password: ",
20        &mut buf,
21        RppFlags::FORCEUPPER | RppFlags::ECHO_ON,
22    )
23    .expect("failed reading passphrase");
24    println!("{password}");
25}