yb 0.5.2

Secure blob storage on a YubiKey
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

// SPDX-FileCopyrightText: 2025 - 2026 Frederic Ruget <fred@atlant.is> (GitHub: @douzebis)
//
// SPDX-License-Identifier: MIT

//! `yb select` — interactively pick a YubiKey and print its serial number.
//!
//! Intended for scripting: `yb --serial "$(yb select)" store myfile`

use anyhow::{bail, Result};
use clap::Args;
use std::sync::Arc;
use yb_core::{HardwarePiv, PivBackend, VirtualPiv};

#[derive(Args, Debug)]
pub struct SelectArgs {
    /// Print the reader name instead of the serial number.
    #[arg(long = "reader")]
    pub reader: bool,
}

pub fn run(args: &SelectArgs) -> Result<()> {
    let piv: Arc<dyn PivBackend> = if let Ok(path) = std::env::var("YB_FIXTURE") {
        Arc::new(VirtualPiv::from_fixture(std::path::Path::new(&path))?)
    } else {
        Arc::new(HardwarePiv::new())
    };

    let devices = piv.list_devices()?;

    let selected = match devices.len() {
        0 => bail!("no YubiKey found"),
        1 => devices.into_iter().next().unwrap(),
        _ => {
            if !atty::is(atty::Stream::Stderr) {
                bail!("multiple YubiKeys found and no TTY — use --serial to select one");
            }
            match super::picker::run_picker(&piv, &devices)? {
                Some((d, _flash)) => d,
                None => bail!("device selection cancelled"),
            }
        }
    };

    if args.reader {
        println!("{}", selected.reader);
    } else {
        println!("{}", selected.serial);
    }
    Ok(())
}