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import {encodeURLEncodedBase64, decodeURLEncodedBase64} from '../utils.js';
import {showElem} from '../utils/dom.js';
import {GET, POST} from '../modules/fetch.js';
const {appSubUrl} = window.config;
export async function initUserAuthWebAuthn() {
const elPrompt = document.querySelector('.user.signin.webauthn-prompt');
if (!elPrompt) {
return;
}
if (!detectWebAuthnSupport()) {
return;
}
const res = await GET(`${appSubUrl}/user/webauthn/assertion`);
if (res.status !== 200) {
webAuthnError('unknown');
return;
}
const options = await res.json();
options.publicKey.challenge = decodeURLEncodedBase64(options.publicKey.challenge);
for (const cred of options.publicKey.allowCredentials) {
cred.id = decodeURLEncodedBase64(cred.id);
}
try {
const credential = await navigator.credentials.get({
publicKey: options.publicKey,
});
await verifyAssertion(credential);
} catch (err) {
if (!options.publicKey.extensions?.appid) {
webAuthnError('general', err.message);
return;
}
delete options.publicKey.extensions.appid;
try {
const credential = await navigator.credentials.get({
publicKey: options.publicKey,
});
await verifyAssertion(credential);
} catch (err) {
webAuthnError('general', err.message);
}
}
}
async function verifyAssertion(assertedCredential) {
// Move data into Arrays in case it is super long
const authData = new Uint8Array(assertedCredential.response.authenticatorData);
const clientDataJSON = new Uint8Array(assertedCredential.response.clientDataJSON);
const rawId = new Uint8Array(assertedCredential.rawId);
const sig = new Uint8Array(assertedCredential.response.signature);
const userHandle = new Uint8Array(assertedCredential.response.userHandle);
const res = await POST(`${appSubUrl}/user/webauthn/assertion`, {
data: {
id: assertedCredential.id,
rawId: encodeURLEncodedBase64(rawId),
type: assertedCredential.type,
clientExtensionResults: assertedCredential.getClientExtensionResults(),
response: {
authenticatorData: encodeURLEncodedBase64(authData),
clientDataJSON: encodeURLEncodedBase64(clientDataJSON),
signature: encodeURLEncodedBase64(sig),
userHandle: encodeURLEncodedBase64(userHandle),
},
},
});
if (res.status === 500) {
webAuthnError('unknown');
return;
} else if (res.status !== 200) {
webAuthnError('unable-to-process');
return;
}
const reply = await res.json();
window.location.href = reply?.redirect ?? `${appSubUrl}/`;
}
async function webauthnRegistered(newCredential) {
const attestationObject = new Uint8Array(newCredential.response.attestationObject);
const clientDataJSON = new Uint8Array(newCredential.response.clientDataJSON);
const rawId = new Uint8Array(newCredential.rawId);
const res = await POST(`${appSubUrl}/user/settings/security/webauthn/register`, {
data: {
id: newCredential.id,
rawId: encodeURLEncodedBase64(rawId),
type: newCredential.type,
response: {
attestationObject: encodeURLEncodedBase64(attestationObject),
clientDataJSON: encodeURLEncodedBase64(clientDataJSON),
},
},
});
if (res.status === 409) {
webAuthnError('duplicated');
return;
} else if (res.status !== 201) {
webAuthnError('unknown');
return;
}
window.location.reload();
}
function webAuthnError(errorType, message) {
const elErrorMsg = document.getElementById(`webauthn-error-msg`);
if (errorType === 'general') {
elErrorMsg.textContent = message || 'unknown error';
} else {
const elTypedError = document.querySelector(`#webauthn-error [data-webauthn-error-msg=${errorType}]`);
if (elTypedError) {
elErrorMsg.textContent = `${elTypedError.textContent}${message ? ` ${message}` : ''}`;
} else {
elErrorMsg.textContent = `unknown error type: ${errorType}${message ? ` ${message}` : ''}`;
}
}
showElem('#webauthn-error');
}
function detectWebAuthnSupport() {
if (!window.isSecureContext) {
webAuthnError('insecure');
return false;
}
if (typeof window.PublicKeyCredential !== 'function') {
webAuthnError('browser');
return false;
}
return true;
}
export function initUserAuthWebAuthnRegister() {
const elRegister = document.getElementById('register-webauthn');
if (!elRegister) {
return;
}
if (!detectWebAuthnSupport()) {
elRegister.disabled = true;
return;
}
elRegister.addEventListener('click', async (e) => {
e.preventDefault();
await webAuthnRegisterRequest();
});
}
async function webAuthnRegisterRequest() {
const elNickname = document.getElementById('nickname');
const formData = new FormData();
formData.append('name', elNickname.value);
const res = await POST(`${appSubUrl}/user/settings/security/webauthn/request_register`, {
data: formData,
});
if (res.status === 409) {
webAuthnError('duplicated');
return;
} else if (res.status !== 200) {
webAuthnError('unknown');
return;
}
const options = await res.json();
elNickname.closest('div.field').classList.remove('error');
options.publicKey.challenge = decodeURLEncodedBase64(options.publicKey.challenge);
options.publicKey.user.id = decodeURLEncodedBase64(options.publicKey.user.id);
if (options.publicKey.excludeCredentials) {
for (const cred of options.publicKey.excludeCredentials) {
cred.id = decodeURLEncodedBase64(cred.id);
}
}
try {
const credential = await navigator.credentials.create({
publicKey: options.publicKey,
});
await webauthnRegistered(credential);
} catch (err) {
webAuthnError('unknown', err);
}
}
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