use authenticator::{
authenticatorservice::{AuthenticatorService, RegisterArgs, SignArgs},
crypto::COSEAlgorithm,
ctap2::commands::StatusCode,
ctap2::server::{
PublicKeyCredentialDescriptor, PublicKeyCredentialParameters,
PublicKeyCredentialUserEntity, RelyingParty, ResidentKeyRequirement, Transport,
UserVerificationRequirement,
},
errors::{AuthenticatorError, CommandError, HIDError, UnsupportedOption},
statecallback::StateCallback,
Pin, StatusPinUv, StatusUpdate,
};
use getopts::Options;
use sha2::{Digest, Sha256};
use std::sync::mpsc::{channel, RecvError};
use std::{env, thread};
fn print_usage(program: &str, opts: Options) {
let brief = format!("Usage: {program} [options]");
print!("{}", opts.usage(&brief));
}
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("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", 25) {
Ok(timeout_s) => {
println!("Using {}s as the timeout", &timeout_s);
timeout_s * 1_000
}
Err(e) => {
println!("{e}");
print_usage(&program, opts);
return;
}
};
println!("Asking a security key to register now...");
let challenge_str = format!(
"{}{}",
r#"{"challenge": "1vQ9mxionq0ngCnjD-wTsv1zUSrGRtFqG2xP09SbZ70","#,
r#" "version": "U2F_V2", "appId": "http://example.com"}"#
);
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 device notice")
}
Err(RecvError) => {
println!("STATUS: end");
return;
}
}
});
let user = PublicKeyCredentialUserEntity {
id: "user_id".as_bytes().to_vec(),
name: Some("A. User".to_string()),
display_name: None,
};
let origin = "https://example.com".to_string();
let mut ctap_args = RegisterArgs {
client_data_hash: chall_bytes,
relying_party: RelyingParty {
id: "example.com".to_string(),
name: None,
},
origin: origin.clone(),
user,
pub_cred_params: vec![
PublicKeyCredentialParameters {
alg: COSEAlgorithm::ES256,
},
PublicKeyCredentialParameters {
alg: COSEAlgorithm::RS256,
},
],
exclude_list: vec![],
user_verification_req: UserVerificationRequirement::Preferred,
resident_key_req: ResidentKeyRequirement::Discouraged,
extensions: Default::default(),
pin: None,
use_ctap1_fallback: false,
};
let mut registered_key_handle = None;
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.clone(), status_tx.clone(), 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!");
println!("Registering again with the key_handle we just got back. This should result in a 'already registered' error.");
let key_handle = a
.att_obj
.auth_data
.credential_data
.unwrap()
.credential_id
.clone();
let pub_key = PublicKeyCredentialDescriptor {
id: key_handle,
transports: vec![Transport::USB],
};
ctap_args.exclude_list = vec![pub_key.clone()];
registered_key_handle = Some(pub_key);
continue;
}
Err(AuthenticatorError::CredentialExcluded) => {
println!("Got an 'already registered' error, as expected.");
if ctap_args.exclude_list.len() > 1 {
println!("Quitting.");
break;
}
println!("Extending the list to contain more invalid handles.");
let registered_handle = ctap_args.exclude_list[0].clone();
ctap_args.exclude_list = vec![];
for ii in 0..10 {
ctap_args.exclude_list.push(PublicKeyCredentialDescriptor {
id: vec![ii; 50],
transports: vec![Transport::USB],
});
}
ctap_args.exclude_list.push(registered_handle);
continue;
}
Err(e) => panic!("Registration failed: {:?}", e),
};
}
let mut ctap_args = SignArgs {
client_data_hash: chall_bytes,
origin,
relying_party_id: "example.com".to_string(),
allow_list: vec![],
extensions: Default::default(),
pin: None,
use_ctap1_fallback: false,
user_verification_req: UserVerificationRequirement::Preferred,
user_presence_req: true,
};
let mut no_cred_errors_done = 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.clone(), status_tx.clone(), callback) {
panic!("Couldn't sign: {:?}", e);
};
let sign_result = sign_rx
.recv()
.expect("Problem receiving, unable to continue");
match sign_result {
Ok(_) => {
if !no_cred_errors_done {
panic!("Should have errored out with NoCredentials, but it succeeded.");
}
println!("Successfully signed!");
if ctap_args.allow_list.len() > 1 {
println!("Quitting.");
break;
}
println!("Signing again with a long allow_list that needs pre-flighting.");
let registered_handle = registered_key_handle.as_ref().unwrap().clone();
ctap_args.allow_list = vec![];
for ii in 0..10 {
ctap_args.allow_list.push(PublicKeyCredentialDescriptor {
id: vec![ii; 50],
transports: vec![Transport::USB],
});
}
ctap_args.allow_list.push(registered_handle);
continue;
}
Err(AuthenticatorError::HIDError(HIDError::Command(CommandError::StatusCode(
StatusCode::NoCredentials,
None,
))))
| Err(AuthenticatorError::UnsupportedOption(UnsupportedOption::EmptyAllowList)) => {
if ctap_args.allow_list.is_empty() {
println!(
"Got an 'no credentials' error, as expected with an empty allow-list."
);
println!("Extending the list to contain only fake handles.");
ctap_args.allow_list = vec![];
for ii in 0..10 {
ctap_args.allow_list.push(PublicKeyCredentialDescriptor {
id: vec![ii; 50],
transports: vec![Transport::USB],
});
}
} else {
println!(
"Got an 'no credentials' error, as expected with an all-fake allow-list."
);
println!("Extending the list to contain one valid handle.");
let registered_handle = registered_key_handle.as_ref().unwrap().clone();
ctap_args.allow_list = vec![registered_handle];
no_cred_errors_done = true;
}
continue;
}
Err(e) => panic!("Registration failed: {:?}", e),
};
}
println!("Done")
}