use authenticator::{
authenticatorservice::{AuthenticatorService, RegisterArgs, SignArgs},
crypto::COSEAlgorithm,
ctap2::server::{
AuthenticationExtensionsClientInputs, PublicKeyCredentialDescriptor,
PublicKeyCredentialParameters, PublicKeyCredentialUserEntity, RelyingParty,
ResidentKeyRequirement, Transport, UserVerificationRequirement,
},
statecallback::StateCallback,
Pin, StatusPinUv, StatusUpdate,
};
use getopts::Options;
use sha2::{Digest, Sha256};
use std::sync::mpsc::{channel, RecvError};
use std::{env, io, thread};
use std::io::Write;
fn print_usage(program: &str, opts: Options) {
println!("------------------------------------------------------------------------");
println!("This program registers 3x the same origin with different users and");
println!("requests 'discoverable credentials' for them.");
println!("After that, we try to log in to that origin and list all credentials found.");
println!("------------------------------------------------------------------------");
let brief = format!("Usage: {program} [options]");
print!("{}", opts.usage(&brief));
}
fn ask_user_choice(choices: &[PublicKeyCredentialUserEntity]) -> Option<usize> {
for (idx, op) in choices.iter().enumerate() {
println!("({idx}) \"{}\"", op.name.as_ref().unwrap());
}
println!("({}) Cancel", choices.len());
let mut input = String::new();
loop {
input.clear();
print!("Your choice: ");
io::stdout()
.lock()
.flush()
.expect("Failed to flush stdout!");
io::stdin()
.read_line(&mut input)
.expect("error: unable to read user input");
if let Ok(idx) = input.trim().parse::<usize>() {
if idx < choices.len() {
println!();
return Some(idx);
} else if idx == choices.len() {
println!();
return None;
}
println!("invalid input");
}
}
}
fn register_user(manager: &mut AuthenticatorService, username: &str, timeout_ms: u64) {
println!();
println!("*********************************************************************");
println!("Asking a security key to register now with user: {username}");
println!("*********************************************************************");
println!("Asking a security key to register now...");
let challenge_str = format!(
"{}{}{}{}",
r#"{"challenge": "1vQ9mxionq0ngCnjD-wTsv1zUSrGRtFqG2xP09SbZ70","#,
r#" "version": "U2F_V2", "appId": "http://example.com", "username": ""#,
username,
r#""}"#
);
let chall_bytes = Sha256::digest(challenge_str.as_bytes()).into();
let (status_tx, status_rx) = channel::<StatusUpdate>();
thread::spawn(move || loop {
match status_rx.recv() {
Ok(StatusUpdate::InteractiveManagement(..)) => {
panic!("STATUS: This can't happen when doing non-interactive usage");
}
Ok(StatusUpdate::SelectDeviceNotice) => {
println!("STATUS: Please select a device by touching one of them.");
}
Ok(StatusUpdate::PresenceRequired) => {
println!("STATUS: waiting for user presence");
}
Ok(StatusUpdate::PinUvError(StatusPinUv::PinRequired(sender))) => {
let raw_pin =
rpassword::prompt_password_stderr("Enter PIN: ").expect("Failed to read PIN");
sender.send(Pin::new(&raw_pin)).expect("Failed to send PIN");
continue;
}
Ok(StatusUpdate::PinUvError(StatusPinUv::InvalidPin(sender, attempts))) => {
println!(
"Wrong PIN! {}",
attempts.map_or("Try again.".to_string(), |a| format!(
"You have {a} attempts left."
))
);
let raw_pin =
rpassword::prompt_password_stderr("Enter PIN: ").expect("Failed to read PIN");
sender.send(Pin::new(&raw_pin)).expect("Failed to send PIN");
continue;
}
Ok(StatusUpdate::PinUvError(StatusPinUv::PinAuthBlocked)) => {
panic!("Too many failed attempts in one row. Your device has been temporarily blocked. Please unplug it and plug in again.")
}
Ok(StatusUpdate::PinUvError(StatusPinUv::PinBlocked)) => {
panic!("Too many failed attempts. Your device has been blocked. Reset it.")
}
Ok(StatusUpdate::PinUvError(StatusPinUv::InvalidUv(attempts))) => {
println!(
"Wrong UV! {}",
attempts.map_or("Try again.".to_string(), |a| format!(
"You have {a} attempts left."
))
);
continue;
}
Ok(StatusUpdate::PinUvError(StatusPinUv::UvBlocked)) => {
println!("Too many failed UV-attempts.");
continue;
}
Ok(StatusUpdate::PinUvError(e)) => {
panic!("Unexpected error: {:?}", e)
}
Ok(StatusUpdate::SelectResultNotice(_, _)) => {
panic!("Unexpected select result notice")
}
Err(RecvError) => {
println!("STATUS: end");
return;
}
}
});
let user = PublicKeyCredentialUserEntity {
id: username.as_bytes().to_vec(),
name: Some(username.to_string()),
display_name: None,
};
let origin = "https://example.com".to_string();
let ctap_args = RegisterArgs {
client_data_hash: chall_bytes,
relying_party: RelyingParty {
id: "example.com".to_string(),
name: None,
},
origin,
user,
pub_cred_params: vec![
PublicKeyCredentialParameters {
alg: COSEAlgorithm::ES256,
},
PublicKeyCredentialParameters {
alg: COSEAlgorithm::RS256,
},
],
exclude_list: vec![PublicKeyCredentialDescriptor {
id: vec![],
transports: vec![Transport::USB, Transport::NFC],
}],
user_verification_req: UserVerificationRequirement::Required,
resident_key_req: ResidentKeyRequirement::Required,
extensions: AuthenticationExtensionsClientInputs {
cred_props: Some(true),
..Default::default()
},
pin: None,
use_ctap1_fallback: false,
};
let attestation_object;
loop {
let (register_tx, register_rx) = channel();
let callback = StateCallback::new(Box::new(move |rv| {
register_tx.send(rv).unwrap();
}));
if let Err(e) = manager.register(timeout_ms, ctap_args, status_tx, callback) {
panic!("Couldn't register: {:?}", e);
};
let register_result = register_rx
.recv()
.expect("Problem receiving, unable to continue");
match register_result {
Ok(a) => {
println!("Ok!");
attestation_object = a;
break;
}
Err(e) => panic!("Registration failed: {:?}", e),
};
}
println!("Register result: {:?}", &attestation_object);
}
fn main() {
env_logger::init();
let args: Vec<String> = env::args().collect();
let program = args[0].clone();
let mut opts = Options::new();
opts.optflag("h", "help", "print this help menu").optopt(
"t",
"timeout",
"timeout in seconds",
"SEC",
);
opts.optflag(
"s",
"skip_reg",
"Skip registration");
opts.optflag("h", "help", "print this help menu");
let matches = match opts.parse(&args[1..]) {
Ok(m) => m,
Err(f) => panic!("{}", f.to_string()),
};
if matches.opt_present("help") {
print_usage(&program, opts);
return;
}
let mut manager =
AuthenticatorService::new().expect("The auth service should initialize safely");
manager.add_u2f_usb_hid_platform_transports();
let timeout_ms = match matches.opt_get_default::<u64>("timeout", 15) {
Ok(timeout_s) => {
println!("Using {}s as the timeout", &timeout_s);
timeout_s * 1_000
}
Err(e) => {
println!("{e}");
print_usage(&program, opts);
return;
}
};
if !matches.opt_present("skip_reg") {
for username in &["A. User", "A. Nother", "Dr. Who"] {
register_user(&mut manager, username, timeout_ms)
}
}
println!();
println!("*********************************************************************");
println!("Asking a security key to sign now, with the data from the register...");
println!("*********************************************************************");
let allow_list = Vec::new();
let origin = "https://example.com".to_string();
let challenge_str = format!(
"{}{}",
r#"{"challenge": "1vQ9mxionq0ngCnjD-wTsv1zUSrGRtFqG2xP09SbZ70","#,
r#" "version": "U2F_V2", "appId": "http://example.com" "#,
);
let (status_tx, status_rx) = channel::<StatusUpdate>();
thread::spawn(move || loop {
match status_rx.recv() {
Ok(StatusUpdate::InteractiveManagement(..)) => {
panic!("STATUS: This can't happen when doing non-interactive usage");
}
Ok(StatusUpdate::SelectDeviceNotice) => {
println!("STATUS: Please select a device by touching one of them.");
}
Ok(StatusUpdate::PresenceRequired) => {
println!("STATUS: waiting for user presence");
}
Ok(StatusUpdate::PinUvError(StatusPinUv::PinRequired(sender))) => {
let raw_pin =
rpassword::prompt_password_stderr("Enter PIN: ").expect("Failed to read PIN");
sender.send(Pin::new(&raw_pin)).expect("Failed to send PIN");
continue;
}
Ok(StatusUpdate::PinUvError(StatusPinUv::InvalidPin(sender, attempts))) => {
println!(
"Wrong PIN! {}",
attempts.map_or("Try again.".to_string(), |a| format!(
"You have {a} attempts left."
))
);
let raw_pin =
rpassword::prompt_password_stderr("Enter PIN: ").expect("Failed to read PIN");
sender.send(Pin::new(&raw_pin)).expect("Failed to send PIN");
continue;
}
Ok(StatusUpdate::PinUvError(StatusPinUv::PinAuthBlocked)) => {
panic!("Too many failed attempts in one row. Your device has been temporarily blocked. Please unplug it and plug in again.")
}
Ok(StatusUpdate::PinUvError(StatusPinUv::PinBlocked)) => {
panic!("Too many failed attempts. Your device has been blocked. Reset it.")
}
Ok(StatusUpdate::PinUvError(StatusPinUv::InvalidUv(attempts))) => {
println!(
"Wrong UV! {}",
attempts.map_or("Try again.".to_string(), |a| format!(
"You have {a} attempts left."
))
);
continue;
}
Ok(StatusUpdate::PinUvError(StatusPinUv::UvBlocked)) => {
println!("Too many failed UV-attempts.");
continue;
}
Ok(StatusUpdate::PinUvError(e)) => {
panic!("Unexpected error: {:?}", e)
}
Ok(StatusUpdate::SelectResultNotice(index_sender, users)) => {
println!("Multiple signatures returned. Select one or cancel.");
let idx = ask_user_choice(&users);
index_sender.send(idx).expect("Failed to send choice");
}
Err(RecvError) => {
println!("STATUS: end");
return;
}
}
});
let chall_bytes = Sha256::digest(challenge_str.as_bytes()).into();
let ctap_args = SignArgs {
client_data_hash: chall_bytes,
origin,
relying_party_id: "example.com".to_string(),
allow_list,
user_verification_req: UserVerificationRequirement::Required,
user_presence_req: true,
extensions: Default::default(),
pin: None,
use_ctap1_fallback: false,
};
loop {
let (sign_tx, sign_rx) = channel();
let callback = StateCallback::new(Box::new(move |rv| {
sign_tx.send(rv).unwrap();
}));
if let Err(e) = manager.sign(timeout_ms, ctap_args, status_tx, callback) {
panic!("Couldn't sign: {:?}", e);
}
let sign_result = sign_rx
.recv()
.expect("Problem receiving, unable to continue");
match sign_result {
Ok(assertion_object) => {
println!("Assertion Object: {assertion_object:?}");
println!("-----------------------------------------------------------------");
println!("Found credentials:");
println!(
"{:?}",
assertion_object.assertion.user.clone().unwrap().name.unwrap() );
println!("-----------------------------------------------------------------");
println!("Done.");
break;
}
Err(e) => panic!("Signing failed: {:?}", e),
}
}
}