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| 1 | +/* This Source Code Form is subject to the terms of the Mozilla Public |
| 2 | + * License, v. 2.0. If a copy of the MPL was not distributed with this |
| 3 | + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| 4 | + |
| 5 | +use authenticator::{ |
| 6 | + authenticatorservice::{AuthenticatorService, RegisterArgs, SignArgs}, |
| 7 | + crypto::COSEAlgorithm, |
| 8 | + ctap2::server::{ |
| 9 | + AuthenticationExtensionsClientInputs, AuthenticationExtensionsPRFInputs, |
| 10 | + AuthenticationExtensionsPRFValues, HMACGetSecretInput, PublicKeyCredentialDescriptor, |
| 11 | + PublicKeyCredentialParameters, PublicKeyCredentialUserEntity, RelyingParty, |
| 12 | + ResidentKeyRequirement, Transport, UserVerificationRequirement, |
| 13 | + }, |
| 14 | + statecallback::StateCallback, |
| 15 | + Pin, StatusPinUv, StatusUpdate, |
| 16 | +}; |
| 17 | +use getopts::Options; |
| 18 | +use rand::{thread_rng, RngCore}; |
| 19 | +use std::sync::mpsc::{channel, RecvError}; |
| 20 | +use std::{env, thread}; |
| 21 | + |
| 22 | +fn print_usage(program: &str, opts: Options) { |
| 23 | + let brief = format!("Usage: {program} [options]"); |
| 24 | + print!("{}", opts.usage(&brief)); |
| 25 | +} |
| 26 | + |
| 27 | +fn main() { |
| 28 | + env_logger::init(); |
| 29 | + |
| 30 | + let args: Vec<String> = env::args().collect(); |
| 31 | + let program = args[0].clone(); |
| 32 | + |
| 33 | + let rp_id = "example.com".to_string(); |
| 34 | + |
| 35 | + let mut opts = Options::new(); |
| 36 | + opts.optflag("h", "help", "print this help menu").optopt( |
| 37 | + "t", |
| 38 | + "timeout", |
| 39 | + "timeout in seconds", |
| 40 | + "SEC", |
| 41 | + ); |
| 42 | + opts.optflag("h", "help", "print this help menu"); |
| 43 | + opts.optflag( |
| 44 | + "", |
| 45 | + "hmac-secret", |
| 46 | + "Return hmac-secret outputs instead of prf outputs (i.e., do not prefix and hash the inputs)", |
| 47 | + ); |
| 48 | + let matches = match opts.parse(&args[1..]) { |
| 49 | + Ok(m) => m, |
| 50 | + Err(f) => panic!("{}", f.to_string()), |
| 51 | + }; |
| 52 | + if matches.opt_present("help") { |
| 53 | + print_usage(&program, opts); |
| 54 | + return; |
| 55 | + } |
| 56 | + |
| 57 | + let mut manager = |
| 58 | + AuthenticatorService::new().expect("The auth service should initialize safely"); |
| 59 | + manager.add_u2f_usb_hid_platform_transports(); |
| 60 | + |
| 61 | + let timeout_ms = match matches.opt_get_default::<u64>("timeout", 25) { |
| 62 | + Ok(timeout_s) => { |
| 63 | + println!("Using {}s as the timeout", &timeout_s); |
| 64 | + timeout_s * 1_000 |
| 65 | + } |
| 66 | + Err(e) => { |
| 67 | + println!("{e}"); |
| 68 | + print_usage(&program, opts); |
| 69 | + return; |
| 70 | + } |
| 71 | + }; |
| 72 | + |
| 73 | + let (register_hmac_secret, sign_hmac_secret, register_prf, sign_prf) = |
| 74 | + if matches.opt_present("hmac-secret") { |
| 75 | + let register_hmac_secret = Some(true); |
| 76 | + let sign_hmac_secret = Some(HMACGetSecretInput { |
| 77 | + salt1: [0x07; 32], |
| 78 | + salt2: Some([0x07; 32]), |
| 79 | + }); |
| 80 | + (register_hmac_secret, sign_hmac_secret, None, None) |
| 81 | + } else { |
| 82 | + let register_prf = Some(AuthenticationExtensionsPRFInputs::default()); |
| 83 | + let sign_prf = Some(AuthenticationExtensionsPRFInputs { |
| 84 | + eval: Some(AuthenticationExtensionsPRFValues { |
| 85 | + first: vec![1, 2, 3, 4], |
| 86 | + second: Some(vec![1, 2, 3, 4]), |
| 87 | + }), |
| 88 | + eval_by_credential: None, |
| 89 | + }); |
| 90 | + (None, None, register_prf, sign_prf) |
| 91 | + }; |
| 92 | + |
| 93 | + println!("Asking a security key to register now..."); |
| 94 | + let mut chall_bytes = [0u8; 32]; |
| 95 | + thread_rng().fill_bytes(&mut chall_bytes); |
| 96 | + |
| 97 | + let (status_tx, status_rx) = channel::<StatusUpdate>(); |
| 98 | + thread::spawn(move || loop { |
| 99 | + match status_rx.recv() { |
| 100 | + Ok(StatusUpdate::InteractiveManagement(..)) => { |
| 101 | + panic!("STATUS: This can't happen when doing non-interactive usage"); |
| 102 | + } |
| 103 | + Ok(StatusUpdate::SelectDeviceNotice) => { |
| 104 | + println!("STATUS: Please select a device by touching one of them."); |
| 105 | + } |
| 106 | + Ok(StatusUpdate::PresenceRequired) => { |
| 107 | + println!("STATUS: waiting for user presence"); |
| 108 | + } |
| 109 | + Ok(StatusUpdate::PinUvError(StatusPinUv::PinRequired(sender))) => { |
| 110 | + let raw_pin = |
| 111 | + rpassword::prompt_password_stderr("Enter PIN: ").expect("Failed to read PIN"); |
| 112 | + sender.send(Pin::new(&raw_pin)).expect("Failed to send PIN"); |
| 113 | + continue; |
| 114 | + } |
| 115 | + Ok(StatusUpdate::PinUvError(StatusPinUv::InvalidPin(sender, attempts))) => { |
| 116 | + println!( |
| 117 | + "Wrong PIN! {}", |
| 118 | + attempts.map_or("Try again.".to_string(), |a| format!( |
| 119 | + "You have {a} attempts left." |
| 120 | + )) |
| 121 | + ); |
| 122 | + let raw_pin = |
| 123 | + rpassword::prompt_password_stderr("Enter PIN: ").expect("Failed to read PIN"); |
| 124 | + sender.send(Pin::new(&raw_pin)).expect("Failed to send PIN"); |
| 125 | + continue; |
| 126 | + } |
| 127 | + Ok(StatusUpdate::PinUvError(StatusPinUv::PinAuthBlocked)) => { |
| 128 | + panic!("Too many failed attempts in one row. Your device has been temporarily blocked. Please unplug it and plug in again.") |
| 129 | + } |
| 130 | + Ok(StatusUpdate::PinUvError(StatusPinUv::PinBlocked)) => { |
| 131 | + panic!("Too many failed attempts. Your device has been blocked. Reset it.") |
| 132 | + } |
| 133 | + Ok(StatusUpdate::PinUvError(StatusPinUv::InvalidUv(attempts))) => { |
| 134 | + println!( |
| 135 | + "Wrong UV! {}", |
| 136 | + attempts.map_or("Try again.".to_string(), |a| format!( |
| 137 | + "You have {a} attempts left." |
| 138 | + )) |
| 139 | + ); |
| 140 | + continue; |
| 141 | + } |
| 142 | + Ok(StatusUpdate::PinUvError(StatusPinUv::UvBlocked)) => { |
| 143 | + println!("Too many failed UV-attempts."); |
| 144 | + continue; |
| 145 | + } |
| 146 | + Ok(StatusUpdate::PinUvError(e)) => { |
| 147 | + panic!("Unexpected error: {:?}", e) |
| 148 | + } |
| 149 | + Ok(StatusUpdate::SelectResultNotice(_, _)) => { |
| 150 | + panic!("Unexpected select device notice") |
| 151 | + } |
| 152 | + Err(RecvError) => { |
| 153 | + println!("STATUS: end"); |
| 154 | + return; |
| 155 | + } |
| 156 | + } |
| 157 | + }); |
| 158 | + |
| 159 | + let user = PublicKeyCredentialUserEntity { |
| 160 | + id: "user_id".as_bytes().to_vec(), |
| 161 | + name: Some("A. User".to_string()), |
| 162 | + display_name: None, |
| 163 | + }; |
| 164 | + let relying_party = RelyingParty { |
| 165 | + id: rp_id.clone(), |
| 166 | + name: None, |
| 167 | + }; |
| 168 | + let ctap_args = RegisterArgs { |
| 169 | + client_data_hash: chall_bytes, |
| 170 | + relying_party, |
| 171 | + origin: format!("https://{rp_id}"), |
| 172 | + user, |
| 173 | + pub_cred_params: vec![ |
| 174 | + PublicKeyCredentialParameters { |
| 175 | + alg: COSEAlgorithm::ES256, |
| 176 | + }, |
| 177 | + PublicKeyCredentialParameters { |
| 178 | + alg: COSEAlgorithm::RS256, |
| 179 | + }, |
| 180 | + ], |
| 181 | + exclude_list: vec![], |
| 182 | + user_verification_req: UserVerificationRequirement::Required, |
| 183 | + resident_key_req: ResidentKeyRequirement::Discouraged, |
| 184 | + extensions: AuthenticationExtensionsClientInputs { |
| 185 | + hmac_create_secret: register_hmac_secret, |
| 186 | + prf: register_prf, |
| 187 | + ..Default::default() |
| 188 | + }, |
| 189 | + pin: None, |
| 190 | + use_ctap1_fallback: false, |
| 191 | + }; |
| 192 | + |
| 193 | + let attestation_object; |
| 194 | + let (register_tx, register_rx) = channel(); |
| 195 | + let callback = StateCallback::new(Box::new(move |rv| { |
| 196 | + register_tx.send(rv).unwrap(); |
| 197 | + })); |
| 198 | + |
| 199 | + if let Err(e) = manager.register(timeout_ms, ctap_args, status_tx.clone(), callback) { |
| 200 | + panic!("Couldn't register: {:?}", e); |
| 201 | + }; |
| 202 | + |
| 203 | + let register_result = register_rx |
| 204 | + .recv() |
| 205 | + .expect("Problem receiving, unable to continue"); |
| 206 | + match register_result { |
| 207 | + Ok(a) => { |
| 208 | + println!("Ok!"); |
| 209 | + attestation_object = a; |
| 210 | + } |
| 211 | + Err(e) => panic!("Registration failed: {:?}", e), |
| 212 | + }; |
| 213 | + |
| 214 | + println!("Register result: {:?}", &attestation_object); |
| 215 | + |
| 216 | + println!(); |
| 217 | + println!("*********************************************************************"); |
| 218 | + println!("Asking a security key to sign now, with the data from the register..."); |
| 219 | + println!("*********************************************************************"); |
| 220 | + |
| 221 | + let allow_list; |
| 222 | + if let Some(cred_data) = attestation_object.att_obj.auth_data.credential_data { |
| 223 | + allow_list = vec![PublicKeyCredentialDescriptor { |
| 224 | + id: cred_data.credential_id, |
| 225 | + transports: vec![Transport::USB], |
| 226 | + }]; |
| 227 | + } else { |
| 228 | + allow_list = Vec::new(); |
| 229 | + } |
| 230 | + |
| 231 | + let ctap_args = SignArgs { |
| 232 | + client_data_hash: chall_bytes, |
| 233 | + origin: format!("https://{rp_id}"), |
| 234 | + relying_party_id: rp_id, |
| 235 | + allow_list, |
| 236 | + user_verification_req: UserVerificationRequirement::Required, |
| 237 | + user_presence_req: true, |
| 238 | + extensions: AuthenticationExtensionsClientInputs { |
| 239 | + hmac_get_secret: sign_hmac_secret.clone(), |
| 240 | + prf: sign_prf.clone(), |
| 241 | + ..Default::default() |
| 242 | + }, |
| 243 | + pin: None, |
| 244 | + use_ctap1_fallback: false, |
| 245 | + }; |
| 246 | + |
| 247 | + let (sign_tx, sign_rx) = channel(); |
| 248 | + let callback = StateCallback::new(Box::new(move |rv| { |
| 249 | + sign_tx.send(rv).unwrap(); |
| 250 | + })); |
| 251 | + |
| 252 | + if let Err(e) = manager.sign(timeout_ms, ctap_args, status_tx, callback) { |
| 253 | + panic!("Couldn't sign: {:?}", e); |
| 254 | + } |
| 255 | + |
| 256 | + let sign_result = sign_rx |
| 257 | + .recv() |
| 258 | + .expect("Problem receiving, unable to continue"); |
| 259 | + |
| 260 | + match sign_result { |
| 261 | + Ok(assertion_object) => { |
| 262 | + println!("Assertion Object: {assertion_object:?}"); |
| 263 | + println!("Done."); |
| 264 | + |
| 265 | + if sign_hmac_secret.is_some() { |
| 266 | + let hmac_secret_outputs = assertion_object |
| 267 | + .extensions |
| 268 | + .hmac_get_secret |
| 269 | + .as_ref() |
| 270 | + .expect("Expected hmac-secret output"); |
| 271 | + |
| 272 | + assert_eq!( |
| 273 | + Some(hmac_secret_outputs.output1), |
| 274 | + hmac_secret_outputs.output2, |
| 275 | + "Expected hmac-secret outputs to be equal for equal input" |
| 276 | + ); |
| 277 | + |
| 278 | + assert_eq!( |
| 279 | + assertion_object.extensions.prf, None, |
| 280 | + "Expected no PRF outputs when hmacGetSecret input was present" |
| 281 | + ); |
| 282 | + } |
| 283 | + |
| 284 | + if sign_prf.is_some() { |
| 285 | + let prf_results = assertion_object |
| 286 | + .extensions |
| 287 | + .prf |
| 288 | + .expect("Expected PRF output") |
| 289 | + .results |
| 290 | + .expect("Expected PRF output to contain results"); |
| 291 | + |
| 292 | + assert_eq!( |
| 293 | + Some(prf_results.first), |
| 294 | + prf_results.second, |
| 295 | + "Expected PRF results to be equal for equal input" |
| 296 | + ); |
| 297 | + |
| 298 | + assert_eq!( |
| 299 | + assertion_object.extensions.hmac_get_secret, None, |
| 300 | + "Expected no hmacGetSecret output when PRF input was present" |
| 301 | + ); |
| 302 | + } |
| 303 | + } |
| 304 | + |
| 305 | + Err(e) => panic!("Signing failed: {:?}", e), |
| 306 | + } |
| 307 | +} |
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