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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<script src="https://unpkg.com/@simplewebauthn/browser/dist/bundle/index.es5.umd.min.js"></script>
<script>
const { startAuthentication } = SimpleWebAuthnBrowser;
/**
* Conditional UI test
*
* 1. Start Chrome Canary 105+ with the requisite Conditional UI flag:
*
* open -a /Applications/Google\ Chrome\ Canary.app --args --enable-features=WebAuthenticationConditionalUI
*
* 2. Create an entry in chrome://settings/passwords (temporary requirement) e.g.:
*
* - Site: https://example.simplewebauthn.dev/
* - Username: user@example.simplewebauthn.dev
* - Password: whatever
*
* 3. Register a credential
*
* 4. Reload the page
*
* 5. Interact with the username field above the Authenticate button
*
* Notes:
*
* I'm currently trying to get to calling WebAuthn as fast as I can here, there's a
* Chrome race condition with autofill that sometimes prevents a credential from appearing.
*
* See: https://bugs.chromium.org/p/chromium/issues/detail?id=1322967&q=component%3ABlink%3EWebAuthentication&can=2
*
* I've been assured this race condition is temporary, at which point we'll probably be able
* to include this just before </body> as we'd typically do. And at that point we can
* probably use async/await as well for more sane-looking code.
*/
fetch('/generate-authentication-options')
.then(resp => resp.json())
.then(opts => {
console.log('Authentication Options (Autofill)', opts);
startAuthentication(opts, true)
.then(async asseResp => {
// We can assume the DOM has loaded by now because it had to for the user to be able
// to interact with an input to choose a credential from the autofill
const elemSuccess = document.querySelector('#authSuccess');
const elemError = document.querySelector('#authError');
const elemDebug = document.querySelector('#authDebug');
printDebug(
elemDebug,
'Authentication Response (Autofill)',
JSON.stringify(asseResp, null, 2),
);
const verificationResp = await fetch('/verify-authentication', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify(asseResp),
});
const verificationJSON = await verificationResp.json();
printDebug(
elemDebug,
'Server Response (Autofill)',
JSON.stringify(verificationJSON, null, 2),
);
if (verificationJSON && verificationJSON.verified) {
elemSuccess.innerHTML = `User authenticated!`;
} else {
elemError.innerHTML = `Oh no, something went wrong! Response: <pre>${JSON.stringify(
verificationJSON,
)}</pre>`;
}
})
.catch(err => {
console.error('(Autofill)', err);
});
});
</script>
<link rel="stylesheet" href="./styles.css" />
<title>SimpleWebAuthn Example Site</title>
</head>
<body>
<div class="container">
<h1>SimpleWebAuthn Example Site</h1>
<div class="controls">
<section id="registration">
<button id="btnRegBegin">
<strong>🚪 Register</strong>
</button>
<p id="regSuccess" class="success"></p>
<p id="regError" class="error"></p>
<details open>
<summary>Console</summary>
<textarea id="regDebug" spellcheck="false"></textarea>
</details>
</section>
<section id="authentication">
<form onsubmit="stopSubmit(event)">
<section id="inputUsername">
<label for="username">Username</label>
<input type="text" name="username" autocomplete="username webauthn" autofocus />
<br />
<label for="password">Password</label>
<input type="password" name="password" autocomplete="current-password webauthn" />
<br />
</section>
<button id="btnAuthBegin">
<strong>🔐 Authenticate</strong>
</button>
</form>
<p id="authSuccess" class="success"></p>
<p id="authError" class="error"></p>
<details open>
<summary>Console</summary>
<textarea id="authDebug" spellcheck="false"></textarea>
</details>
</section>
</div>
<p class="systemError"></p>
</div>
<script>
const { browserSupportsWebAuthn, startRegistration } = SimpleWebAuthnBrowser;
function stopSubmit(event) {
event.preventDefault();
}
/**
* A simple way to control how debug content is written to a debug console element
*/
function printDebug(elemDebug, title, output) {
if (elemDebug.innerHTML !== '') {
elemDebug.innerHTML += '\n';
}
elemDebug.innerHTML += `// ${title}\n`;
elemDebug.innerHTML += `${output}\n`;
}
// Hide the Begin button if the browser is incapable of using WebAuthn
if (!browserSupportsWebAuthn()) {
document.querySelector('.controls').style.display = 'none';
document.querySelector('.systemError').innerText =
"It seems this browser doesn't support WebAuthn...";
} else {
function hideAuthForm() {
document.getElementById('inputUsername').style.display = 'none';
}
/**
* Registration
*/
document.querySelector('#btnRegBegin').addEventListener('click', async () => {
const elemSuccess = document.querySelector('#regSuccess');
const elemError = document.querySelector('#regError');
const elemDebug = document.querySelector('#regDebug');
// Reset success/error messages
elemSuccess.innerHTML = '';
elemError.innerHTML = '';
elemDebug.innerHTML = '';
const resp = await fetch('/generate-registration-options');
let attResp;
try {
const opts = await resp.json();
printDebug(elemDebug, 'Registration Options', JSON.stringify(opts, null, 2));
hideAuthForm();
attResp = await startRegistration(opts);
printDebug(elemDebug, 'Registration Response', JSON.stringify(attResp, null, 2));
} catch (error) {
if (error.name === 'InvalidStateError') {
elemError.innerText = 'Error: Authenticator was probably already registered by user';
} else {
elemError.innerText = error;
}
throw error;
}
const verificationResp = await fetch('/verify-registration', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify(attResp),
});
const verificationJSON = await verificationResp.json();
printDebug(elemDebug, 'Server Response', JSON.stringify(verificationJSON, null, 2));
if (verificationJSON && verificationJSON.verified) {
elemSuccess.innerHTML = `Authenticator registered!`;
} else {
elemError.innerHTML = `Oh no, something went wrong! Response: <pre>${JSON.stringify(
verificationJSON,
)}</pre>`;
}
});
/**
* Authentication
*/
document.querySelector('#btnAuthBegin').addEventListener('click', async () => {
const elemSuccess = document.querySelector('#authSuccess');
const elemError = document.querySelector('#authError');
const elemDebug = document.querySelector('#authDebug');
// Reset success/error messages
elemSuccess.innerHTML = '';
elemError.innerHTML = '';
elemDebug.innerHTML = '';
const resp = await fetch('/generate-authentication-options');
let asseResp;
try {
const opts = await resp.json();
printDebug(elemDebug, 'Authentication Options', JSON.stringify(opts, null, 2));
hideAuthForm();
asseResp = await startAuthentication(opts);
printDebug(elemDebug, 'Authentication Response', JSON.stringify(asseResp, null, 2));
} catch (error) {
elemError.innerText = error;
throw new Error(error);
}
const verificationResp = await fetch('/verify-authentication', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify(asseResp),
});
const verificationJSON = await verificationResp.json();
printDebug(elemDebug, 'Server Response', JSON.stringify(verificationJSON, null, 2));
if (verificationJSON && verificationJSON.verified) {
elemSuccess.innerHTML = `User authenticated!`;
} else {
elemError.innerHTML = `Oh no, something went wrong! Response: <pre>${JSON.stringify(
verificationJSON,
)}</pre>`;
}
});
}
</script>
</body>
</html>
|
