1import { isProUser } from "./license";2import * as vault from "./vault";3import {4 base64urlEncode,5 buildAuthenticatorData,6 buildClientDataJSON,7 createAttestationObject,8 generateCredentialId,9 generatePasskeyKeypair,10 pickPasskeyAlgorithm,11 signPasskeyAssertion,12} from "./passkey-crypto";13import { detectBrowser as detectSharedBrowser, firefoxVersion } from "../shared/browser";14import { FIREFOX_USE_CONTENT_SCRIPT_PROXY } from "../shared/passkey-flags";15import { isValidRpId } from "../shared/passkey-utils";16import type {17 PasskeyData,18 PasskeyProviderState,19 PendingPasskeyRequest,20 VaultEntry,21} from "../shared/types";2223declare const __PEACH_E2E_PASSKEYS__: boolean;2425const PENDING_PREFIX = "passkey_pending_";26const APPROVAL_TIMEOUT_MS = 60_000;2728let listenersRegistered = false;29let attached = false;30let conflict: string | undefined;31const PASSKEY_CREATE_E2E_BYPASS = __PEACH_E2E_PASSKEYS__ === true;3233const approvals = new Map<34 number,35 { resolve: (approved: boolean) => void; timeoutId: ReturnType<typeof setTimeout> }36>();37383940const unlockWaiters = new Map<number, { resolve: (ok: boolean) => void; timeoutId: ReturnType<typeof setTimeout> }>();4142434445const cancelledRequests = new Set<number>();46function markCancelled(requestId: number): void {47 cancelledRequests.add(requestId);48 49 50 51 if (cancelledRequests.size > 256) {52 const iter = cancelledRequests.values();53 for (let i = 0; i < 128; i += 1) cancelledRequests.delete(iter.next().value as number);54 }55}5657export function onVaultUnlocked(): void {58 for (const { resolve, timeoutId } of unlockWaiters.values()) {59 clearTimeout(timeoutId);60 resolve(true);61 }62 unlockWaiters.clear();63}6465666768697071export async function denyAllPendingPasskeyRequests(): Promise<void> {72 if (approvals.size === 0 && unlockWaiters.size === 0) return;73 for (const [rid, { resolve, timeoutId }] of approvals.entries()) {74 clearTimeout(timeoutId);75 resolve(false);76 approvals.delete(rid);77 await clearPendingRequest(rid).catch(() => {});78 }79 for (const { resolve, timeoutId } of unlockWaiters.values()) {80 clearTimeout(timeoutId);81 resolve(false);82 }83 unlockWaiters.clear();84}8586function isPasskeySupported(): boolean {87 if (typeof chrome.webAuthenticationProxy?.attach === "function") return true;88 89 90 91 92 if (detectSharedBrowser() === "firefox") {93 const ver = firefoxVersion();94 if (Number.isFinite(ver) && ver >= 150) return true;95 }96 return false;97}9899export const detectBrowser = detectSharedBrowser;100101function getBrowserLabel(): string {102 const ua = navigator.userAgent;103 if (/Firefox\/(\d+)/.test(ua)) {104 const version = ua.match(/Firefox\/(\d+)/)?.[1];105 return version ? `Firefox ${version}` : "Firefox";106 }107 const version = ua.match(/Chrome\/(\d+)/)?.[1];108 return version ? `Chrome ${version}` : "Chromium";109}110111function pendingStorageKey(requestId: number): string {112 return `${PENDING_PREFIX}${requestId}`;113}114115function randomRequestId(): number {116 117 118 119 120 const u = crypto.getRandomValues(new Uint32Array(2));121 return u[0] * 0x200000 + (u[1] >>> 11);122}123124function originFromRpId(rpId: string): string {125 return /^(localhost|127\.0\.0\.1|\[::1\])$/i.test(rpId)126 ? `http://${rpId}`127 : `https://${rpId}`;128}129130131132133134135136137138139140141142143144145async function resolvePageOrigin(rpId: string): Promise<string> {146 try {147 const tabs = await new Promise<chrome.tabs.Tab[]>((resolve) =>148 chrome.tabs.query({ active: true, lastFocusedWindow: true }, resolve)149 );150 const url = tabs[0]?.url;151 if (url) {152 const parsed = new URL(url);153 const host = parsed.hostname.toLowerCase();154 const rp = rpId.toLowerCase();155 if (host === rp || host.endsWith(`.${rp}`)) {156 return parsed.origin;157 }158 }159 } catch {160 161 }162 return originFromRpId(rpId);163}164165async function setBadge(text: string): Promise<void> {166 if (!chrome.action?.setBadgeText) return;167 await chrome.action.setBadgeText({ text });168 if (text) {169 await chrome.action.setBadgeBackgroundColor({ color: "#E5805C" });170 }171}172173async function clearPendingRequest(requestId: number): Promise<void> {174 if (chrome.storage.session) {175 await chrome.storage.session.remove(pendingStorageKey(requestId));176 }177 await setBadge("");178}179180async function openApprovalPopup(): Promise<void> {181 try {182 await chrome.action.openPopup();183 } catch {184 await setBadge("PK");185 }186}187188189190191192193194195196function isInvalidRequestIdError(err: unknown): boolean {197 return err instanceof Error && /invalid requestid/i.test(err.message);198}199200201202203204205206207208209function isMissingResponseJsonError(err: unknown): boolean {210 return err instanceof Error && /missing getresponsedetails/i.test(err.message);211}212213async function rejectCreate(214 requestId: number,215 name: string,216 message = ""217): Promise<void> {218 try {219 await chrome.webAuthenticationProxy.completeCreateRequest({220 requestId,221 error: { name, message },222 });223 } catch (err) {224 if (isInvalidRequestIdError(err)) {225 return;226 }227 throw err;228 }229}230231async function rejectGet(232 requestId: number,233 name: string,234 message = ""235): Promise<void> {236 try {237 await chrome.webAuthenticationProxy.completeGetRequest({238 requestId,239 error: { name, message },240 });241 } catch (err) {242 if (isInvalidRequestIdError(err)) {243 return;244 }245 throw err;246 }247}248249export async function getPendingPasskeyRequest(): Promise<PendingPasskeyRequest | null> {250 if (!chrome.storage.session) return null; 251 const stored = (await chrome.storage.session.get(null)) as Record<string, unknown>;252 const key = Object.keys(stored).find((item) => item.startsWith(PENDING_PREFIX));253 if (!key) return null;254 const pending = stored[key];255 return pending && typeof pending === "object"256 ? (pending as PendingPasskeyRequest)257 : null;258}259260export async function resolvePendingPasskeyRequest(261 requestId: number,262 approved: boolean263): Promise<void> {264 const pending = approvals.get(requestId);265 if (!pending) {266 267 268 269 270 await clearPendingRequest(requestId);271 if (chrome.storage.session) {272 await chrome.storage.session.remove(FIREFOX_PENDING_KEY);273 }274 return;275 }276277 clearTimeout(pending.timeoutId);278 approvals.delete(requestId);279 await clearPendingRequest(requestId);280 pending.resolve(approved);281}282283async function promptUserApproval(request: PendingPasskeyRequest): Promise<boolean> {284 if (chrome.storage.session) {285 await chrome.storage.session.set({ [pendingStorageKey(request.requestId)]: request });286 }287 await openApprovalPopup();288289 return new Promise<boolean>((resolve) => {290 const timeoutId = setTimeout(async () => {291 approvals.delete(request.requestId);292 await clearPendingRequest(request.requestId);293 resolve(false);294 }, APPROVAL_TIMEOUT_MS);295296 approvals.set(request.requestId, { resolve, timeoutId });297 });298}299300export async function getPasskeyProviderState(): Promise<PasskeyProviderState> {301 const settings = await vault.ensureSettingsLoaded();302 const supported = isPasskeySupported();303 const enabled = settings.passkeyProviderEnabled === true;304 return {305 supported,306 enabled,307 attached: supported && attached,308 browserLabel: getBrowserLabel(),309 statusLabel: !supported310 ? "Interception unavailable"311 : attached312 ? "Active"313 : conflict314 ? "Another provider is active"315 : enabled316 ? "Inactive"317 : "Disabled",318 conflict,319 };320}321322async function attachPasskeyProxy(): Promise<void> {323 if (!isPasskeySupported()) {324 attached = false;325 conflict = "This browser does not expose chrome.webAuthenticationProxy.";326 return;327 }328329 330 331 332 if (detectSharedBrowser() === "firefox") {333 attached = true;334 conflict = undefined;335 return;336 }337338 if (attached) return;339340 try {341 await chrome.webAuthenticationProxy.attach();342 attached = true;343 conflict = undefined;344 } catch (error) {345 attached = false;346 conflict = error instanceof Error ? error.message : "Another provider is active.";347 console.warn("[Peach passkey] proxy attach failed", { conflict });348 }349}350351async function detachPasskeyProxy(): Promise<void> {352 if (!isPasskeySupported()) {353 attached = false;354 return;355 }356357 if (detectSharedBrowser() === "firefox") {358 attached = false;359 conflict = undefined;360 return;361 }362363 try {364 await chrome.webAuthenticationProxy.detach();365 } catch {366 367 }368369 attached = false;370 conflict = undefined;371}372373export async function setPasskeyProviderEnabled(enabled: boolean): Promise<PasskeyProviderState> {374 await vault.updateSettings({ passkeyProviderEnabled: enabled });375 if (enabled) {376 await attachPasskeyProxy();377 } else {378 await detachPasskeyProxy();379 }380 return getPasskeyProviderState();381}382383async function refreshPasskeyProxy(): Promise<void> {384 const settings = await vault.ensureSettingsLoaded();385 if (settings.passkeyProviderEnabled === true) {386 await attachPasskeyProxy();387 return;388 }389 await detachPasskeyProxy();390}391392393394395396397398399function findAttachTarget(rpId: string): VaultEntry | null {400 const all = vault.getEntries();401 const passkeyMatch = all.find(402 (entry) => entry.passkey?.rpId === rpId && !entry.deletedAt403 );404 if (passkeyMatch) return passkeyMatch;405 const loginMatches = vault.queryDomain(rpId).filter((entry) => entry.type === "login" && !entry.passkey);406 if (loginMatches.length === 0) return null;407 408 return loginMatches.reduce((best, e) =>409 (e.modifiedAt ?? 0) > (best.modifiedAt ?? 0) ? e : best410 );411}412413async function handleCreateRequest(414 request: chrome.webAuthenticationProxy.CreateRequest415): Promise<void> {416 const options = JSON.parse(request.requestDetailsJson) as PublicKeyCredentialCreationOptionsJSON;417 const rpId = options.rp.id;418 const rpName = options.rp.name ?? options.rp.id;419 const userName = options.user.name;420 const userDisplayName = options.user.displayName ?? options.user.name;421 if (!rpId) {422 console.warn("[Peach passkey] reject: missing rp.id");423 await rejectCreate(request.requestId, "NotSupportedError", "Missing RP ID");424 return;425 }426427 428 429 430 431 432 433 const pageOrigin = await resolvePageOrigin(rpId);434435 if (!PASSKEY_CREATE_E2E_BYPASS && !(await isProUser())) {436 console.warn("[Peach passkey] reject: user is not Pro");437 await rejectCreate(438 request.requestId,439 "NotAllowedError",440 "Passkey creation requires Peach Pro."441 );442 443 broadcastPasskeyProGate();444 return;445 }446447 if (!vault.isUnlocked()) {448 449 450 451 452 453 const tabs = await new Promise<chrome.tabs.Tab[]>((resolve) =>454 chrome.tabs.query({ active: true, lastFocusedWindow: true }, resolve)455 );456 const activeTab = tabs[0];457 if (activeTab?.id) {458 chrome.tabs.sendMessage(activeTab.id, {459 type: 'SUMMON_AUTOFILL',460 source: 'passkey-unlock',461 }).catch((err) => {462 console.warn("[Peach passkey] SUMMON_AUTOFILL failed, falling back to popup", err);463 void openApprovalPopup();464 });465 } else {466 await openApprovalPopup();467 }468469 const unlocked = await new Promise<boolean>((resolve) => {470 const timeoutId = setTimeout(() => {471 unlockWaiters.delete(request.requestId);472 resolve(false);473 }, APPROVAL_TIMEOUT_MS);474 unlockWaiters.set(request.requestId, { resolve, timeoutId });475 });476477 if (!unlocked || !vault.isUnlocked()) {478 console.warn("[Peach passkey] reject: unlock timeout");479 await rejectCreate(request.requestId, "NotAllowedError", "Not unlocked in time.");480 return;481 }482 483 }484485 const approved = await promptUserApproval({486 requestId: request.requestId,487 type: "create",488 rpId,489 rpName,490 userName,491 userDisplayName,492 });493 if (!approved) {494 console.warn("[Peach passkey] reject: user denied");495 await rejectCreate(request.requestId, "NotAllowedError", "User denied request.");496 return;497 }498499 const algorithm = pickPasskeyAlgorithm(options.pubKeyCredParams ?? []);500 if (!algorithm) {501 console.warn("[Peach passkey] reject: no supported algorithm", options.pubKeyCredParams);502 await rejectCreate(request.requestId, "NotSupportedError", "No supported algorithm offered.");503 return;504 }505 const credentialIdBytes = crypto.getRandomValues(new Uint8Array(32));506 const { publicKeyCose, publicKeySpki, privateKeyJwk } = await generatePasskeyKeypair(507 algorithm508 );509 const authData = await buildAuthenticatorData({510 rpId,511 flags: 0x4d,512 signCount: 0,513 credentialId: credentialIdBytes,514 publicKeyCose,515 });516 const attestationObject = createAttestationObject(authData);517 const clientDataJSON = buildClientDataJSON(518 "webauthn.create",519 options.challenge,520 pageOrigin521 );522523 const passkey: PasskeyData = {524 rpId,525 rpName,526 credentialId: base64urlEncode(credentialIdBytes),527 publicKeyCose: base64urlEncode(publicKeyCose),528 privateKeyJwk,529 userHandle: options.user.id,530 userName,531 userDisplayName,532 algorithm,533 signCount: 0,534 aaguid: base64urlEncode(new Uint8Array(16)),535 backupEligible: false,536 backupState: false,537 browser: "chrome",538 transports: ["internal"],539 createdAt: Date.now(),540 };541542 543 544 const target = findAttachTarget(rpId);545 if (target) {546 await vault.updateEntry(target.id, { passkey });547 } else {548 await vault.addEntry({549 type: "login",550 title: rpName,551 url: `https://${rpId}`,552 username: userName,553 passkey,554 });555 }556 557 558 559 await vault.consolidatePasskeyEntries();560561 try {562 await chrome.webAuthenticationProxy.completeCreateRequest({563 requestId: request.requestId,564 responseJson: JSON.stringify({565 id: passkey.credentialId,566 rawId: passkey.credentialId,567 type: "public-key",568 response: {569 clientDataJSON: base64urlEncode(clientDataJSON),570 authenticatorData: base64urlEncode(authData),571 attestationObject: base64urlEncode(attestationObject),572 transports: ["internal"],573 publicKey: base64urlEncode(publicKeySpki),574 publicKeyAlgorithm: algorithm,575 },576 authenticatorAttachment: "platform",577 clientExtensionResults: {},578 }),579 });580 } catch (err) {581 if (isInvalidRequestIdError(err)) {582 return;583 }584 throw err;585 }586}587588function broadcastPasskeyProGate(): void {589 chrome.tabs.query({}, (tabs) => {590 for (const tab of tabs) {591 if (tab.id !== undefined) {592 chrome.tabs.sendMessage(tab.id, { type: "PASSKEY_PRO_GATE" }).catch(() => {});593 }594 }595 });596}597598async function promptViaToast(request: PendingPasskeyRequest): Promise<boolean> {599 if (chrome.storage.session) {600 await chrome.storage.session.set({ [pendingStorageKey(request.requestId)]: request });601 }602603 const tabs = await new Promise<chrome.tabs.Tab[]>((resolve) => {604 chrome.tabs.query({ active: true, currentWindow: true }, resolve);605 });606 const tab = tabs[0];607608 if (tab?.id) {609 chrome.tabs.sendMessage(tab.id, {610 type: 'SHOW_PASSKEY_TOAST',611 payload: {612 site: request.rpId,613 displayName: request.userDisplayName ?? request.userName,614 username: request.userName,615 requestId: String(request.requestId),616 },617 }).catch(() => {});618 } else {619 await openApprovalPopup();620 }621622 return new Promise<boolean>((resolve) => {623 const timeoutId = setTimeout(async () => {624 approvals.delete(request.requestId);625 await clearPendingRequest(request.requestId);626 resolve(false);627 }, APPROVAL_TIMEOUT_MS);628629 approvals.set(request.requestId, { resolve, timeoutId });630 });631}632633async function handleGetRequest(634 request: chrome.webAuthenticationProxy.GetRequest635): Promise<void> {636 const options = JSON.parse(request.requestDetailsJson) as PublicKeyCredentialRequestOptionsJSON;637 if (!vault.isUnlocked()) {638 639 640 641 const tabs = await new Promise<chrome.tabs.Tab[]>((resolve) =>642 chrome.tabs.query({ active: true, currentWindow: true }, resolve)643 );644 const activeTab = tabs[0];645 if (activeTab?.id) {646 chrome.tabs.sendMessage(activeTab.id, {647 type: 'SUMMON_AUTOFILL',648 source: 'passkey-unlock',649 }).catch(() => { void openApprovalPopup(); });650 } else {651 await openApprovalPopup();652 }653654 655 const unlocked = await new Promise<boolean>((resolve) => {656 const timeoutId = setTimeout(() => {657 unlockWaiters.delete(request.requestId);658 resolve(false);659 }, APPROVAL_TIMEOUT_MS);660 unlockWaiters.set(request.requestId, { resolve, timeoutId });661 });662663 if (!unlocked || !vault.isUnlocked()) {664 await rejectGet(request.requestId, "NotAllowedError", "Not unlocked in time.");665 return;666 }667 668 }669670 if (!PASSKEY_CREATE_E2E_BYPASS && !(await isProUser())) {671 await rejectGet(request.requestId, "NotAllowedError", "Passkey use requires Peach Pro.");672 broadcastPasskeyProGate();673 return;674 }675676 const passkeyBearing = vault.getEntries().filter((entry): entry is VaultEntry & { passkey: PasskeyData } =>677 entry.passkey !== undefined && !entry.deletedAt678 );679 const allowedCredentialIds = (options.allowCredentials ?? []).map((descriptor) => descriptor.id);680681 const match = passkeyBearing.find((entry) => {682 if (allowedCredentialIds.length > 0) {683 return allowedCredentialIds.includes(entry.passkey.credentialId);684 }685 if (!options.rpId) return false;686 return entry.passkey.rpId === options.rpId;687 });688689 if (!match) {690 691 692 693 694 695 696 try {697 await chrome.webAuthenticationProxy.completeGetRequest({ requestId: request.requestId });698 } catch (err) {699 if (isInvalidRequestIdError(err)) return;700 if (isMissingResponseJsonError(err)) return;701 throw err;702 }703 return;704 }705706 const credential = match.passkey;707 708 709 710 if (!credential.privateKeyJwk) {711 try {712 await chrome.webAuthenticationProxy.completeGetRequest({ requestId: request.requestId });713 } catch (err) {714 if (isInvalidRequestIdError(err)) return;715 if (isMissingResponseJsonError(err)) return;716 throw err;717 }718 return;719 }720721 const approved = await promptViaToast({722 requestId: request.requestId,723 type: "get",724 rpId: credential.rpId,725 rpName: credential.rpName,726 userName: credential.userName,727 userDisplayName: credential.userDisplayName,728 });729 if (!approved) {730 await rejectGet(request.requestId, "NotAllowedError", "User denied request.");731 return;732 }733734 const nextSignCount = credential.signCount + 1;735 const flags = 0x05 | (credential.backupEligible ? 0x08 : 0) | (credential.backupState ? 0x10 : 0);736 const authData = await buildAuthenticatorData({737 rpId: credential.rpId,738 flags,739 signCount: nextSignCount,740 });741 const clientDataJSON = buildClientDataJSON(742 "webauthn.get",743 options.challenge,744 await resolvePageOrigin(credential.rpId)745 );746 const clientDataHash = new Uint8Array(747 await crypto.subtle.digest("SHA-256", new Uint8Array(clientDataJSON))748 );749 const signature = await signPasskeyAssertion(750 credential.privateKeyJwk,751 credential.algorithm,752 authData,753 clientDataHash754 );755756 await vault.updateEntry(match.id, {757 passkey: {758 ...credential,759 signCount: nextSignCount,760 lastUsedAt: Date.now(),761 },762 });763764 const responseJson = JSON.stringify({765 id: credential.credentialId,766 rawId: credential.credentialId,767 type: "public-key",768 response: {769 clientDataJSON: base64urlEncode(clientDataJSON),770 authenticatorData: base64urlEncode(authData),771 signature: base64urlEncode(signature),772 userHandle: credential.userHandle,773 },774 authenticatorAttachment: "platform",775 clientExtensionResults: {},776 });777778 try {779 await chrome.webAuthenticationProxy.completeGetRequest({780 requestId: request.requestId,781 responseJson,782 });783 } catch (err) {784 if (isInvalidRequestIdError(err)) {785 return;786 }787 throw err;788 }789}790791792793794795796797798799800const FIREFOX_PENDING_KEY = "passkey_pending_firefox";801const FIREFOX_DECLINE_PREFIX = "peach_passkey_offer_declined:";802const FIREFOX_DECLINE_TTL_MS = 30 * 24 * 60 * 60 * 1000; 803804export async function initiateFirefoxPasskeyCreate(args: {805 rpId: string;806 rpName: string;807 userName: string;808 userDisplayName?: string;809}, callerOrigin?: string): Promise<{ ok: boolean; error?: string }> {810 811 812 813 814 815 if (!callerOrigin || !isValidRpId(args.rpId, callerOrigin)) {816 return { ok: false, error: "rpid_origin_mismatch" };817 }818 if (!(await isProUser())) {819 broadcastPasskeyProGate();820 return { ok: false, error: "passkey creation requires Peach Pro" };821 }822 if (!vault.isUnlocked()) {823 await openApprovalPopup();824 return { ok: false, error: "vault_locked" };825 }826 if (!chrome.storage.session) {827 return { ok: false, error: "session storage unavailable" };828 }829830 const requestId = randomRequestId();831 const challenge = base64urlEncode(crypto.getRandomValues(new Uint8Array(32)));832 const userHandle = base64urlEncode(crypto.getRandomValues(new Uint8Array(32)));833834 const pending: PendingPasskeyRequest = {835 requestId,836 type: "create",837 rpId: args.rpId,838 rpName: args.rpName,839 userName: args.userName,840 userDisplayName: args.userDisplayName,841 browser: "firefox",842 challenge,843 userHandle,844 };845846 await chrome.storage.session.set({ [FIREFOX_PENDING_KEY]: pending });847 await openApprovalPopup();848 return { ok: true };849}850851export async function completeFirefoxPasskeyCreate(payload: {852 requestId: number;853 rpId: string;854 rpName: string;855 userName: string;856 userDisplayName?: string;857 userHandle: string;858 credentialId: string;859 publicKeyCose: string;860 algorithm: -7 | -8;861 aaguid?: string;862 transports?: string[];863 backupEligible?: boolean;864 backupState?: boolean;865}): Promise<{ ok: boolean; error?: string }> {866 if (!vault.isUnlocked()) return { ok: false, error: "vault_locked" };867868 869 870 871 872 873 874 const pending = chrome.storage.session875 ? ((await chrome.storage.session.get(FIREFOX_PENDING_KEY))[FIREFOX_PENDING_KEY] as876 | PendingPasskeyRequest877 | undefined)878 : undefined;879 if (880 !pending ||881 pending.requestId !== payload.requestId ||882 pending.rpId !== payload.rpId ||883 pending.userHandle !== payload.userHandle884 ) {885 return { ok: false, error: "no_pending_request" };886 }887888 const passkey: PasskeyData = {889 rpId: payload.rpId,890 rpName: payload.rpName,891 credentialId: payload.credentialId,892 publicKeyCose: payload.publicKeyCose,893 userHandle: payload.userHandle,894 userName: payload.userName,895 userDisplayName: payload.userDisplayName ?? payload.userName,896 algorithm: payload.algorithm,897 signCount: 0,898 aaguid: payload.aaguid ?? base64urlEncode(new Uint8Array(16)),899 backupEligible: payload.backupEligible ?? false,900 backupState: payload.backupState ?? false,901 browser: "firefox",902 transports: payload.transports ?? ["internal"],903 createdAt: Date.now(),904 };905906 907 908 909 const target = findAttachTarget(payload.rpId);910 if (target) {911 await vault.updateEntry(target.id, { passkey });912 } else {913 await vault.addEntry({914 type: "login",915 title: payload.rpName || payload.rpId,916 url: `https://${payload.rpId}`,917 username: payload.userName,918 passkey,919 });920 }921 await vault.consolidatePasskeyEntries();922923 if (chrome.storage.session) {924 await chrome.storage.session.remove(FIREFOX_PENDING_KEY);925 }926 return { ok: true };927}928929function declineKey(domain: string): string {930 return `${FIREFOX_DECLINE_PREFIX}${domain}`;931}932933export async function recordPasskeyOfferDecline(domain: string): Promise<void> {934 if (!domain) return;935 await chrome.storage.local.set({ [declineKey(domain)]: Date.now() });936}937938export async function isPasskeyOfferDeclined(domain: string): Promise<boolean> {939 if (!domain) return false;940 const key = declineKey(domain);941 const stored = (await chrome.storage.local.get(key)) as Record<string, number | undefined>;942 const at = stored[key];943 if (typeof at !== "number") return false;944 if (Date.now() - at > FIREFOX_DECLINE_TTL_MS) {945 await chrome.storage.local.remove(key);946 return false;947 }948 return true;949}950951952953954955956957958959960961962963964interface FirefoxAllowCredential {965 id: string;966 type?: string;967}968969interface FirefoxPubKeyCredParam {970 type?: string;971 alg: number;972}973974export interface FirefoxPasskeyHasCredentialsPayload {975 rpId: string;976 allowCredentials: FirefoxAllowCredential[];977}978979export interface FirefoxPasskeyCreatePayload {980 rpId: string;981 rpName?: string;982 userId: string;983 userName: string;984 userDisplayName?: string;985 challenge: string;986 clientDataJSON: number[];987 origin: string;988 pubKeyCredParams?: FirefoxPubKeyCredParam[];989 authenticatorSelection?: Record<string, unknown>;990 timeout?: number;991 attestation?: string;992}993994export interface FirefoxPasskeyGetPayload {995 rpId: string;996 challenge: string;997 clientDataJSON: number[];998 origin: string;999 allowCredentials: FirefoxAllowCredential[];1000 userVerification?: string;1001}10021003interface FirefoxCreateCredentialResponse {1004 type: "create";1005 id: string;1006 clientDataJSON: number[];1007 attestationObject: string;1008 authenticatorData: string;1009 publicKey: string;1010 algorithm: -7 | -8;1011}10121013interface FirefoxGetCredentialResponse {1014 type: "get";1015 id: string;1016 clientDataJSON: number[];1017 authenticatorData: string;1018 signature: string;1019 userHandle: string;1020}10211022type FirefoxPasskeyResult<T> =1023 | { ok: true; credential: T }1024 | { ok: false; error: "pro_required" | "user_cancelled" | "no_credentials" | "vault_locked" | "not_applicable" | "internal_error"; message?: string };10251026function listPasskeyEntries(): Array<VaultEntry & { passkey: PasskeyData }> {1027 return vault.getEntries().filter(1028 (entry): entry is VaultEntry & { passkey: PasskeyData } =>1029 entry.passkey !== undefined && !entry.deletedAt1030 );1031}103210331034function clientDataJsonOrigin(bytes: number[] | undefined): string | null {1035 if (!Array.isArray(bytes)) return null;1036 try {1037 const obj = JSON.parse(new TextDecoder().decode(new Uint8Array(bytes))) as { origin?: unknown };1038 return typeof obj.origin === "string" ? obj.origin : null;1039 } catch {1040 return null;1041 }1042}104310441045104610471048104910501051105210531054function assertOriginOwnsRpId(1055 rpId: string,1056 callerOrigin: string | undefined,1057 clientDataJSON?: number[],1058): void {1059 if (!callerOrigin || !isValidRpId(rpId, callerOrigin)) {1060 throw new DOMException(1061 `SecurityError: relying party ID "${rpId}" is not a registrable domain ` +1062 `suffix of the calling origin "${callerOrigin ?? "(unknown)"}".`,1063 "SecurityError",1064 );1065 }1066 const cdjOrigin = clientDataJsonOrigin(clientDataJSON);1067 if (cdjOrigin !== null && cdjOrigin !== callerOrigin) {1068 throw new DOMException(1069 `SecurityError: clientDataJSON origin "${cdjOrigin}" does not match the ` +1070 `attested calling origin "${callerOrigin}".`,1071 "SecurityError",1072 );1073 }1074}10751076export async function handlePasskeyHasCredentials(1077 payload: FirefoxPasskeyHasCredentialsPayload,1078 callerOrigin?: string,1079): Promise<{ ok: true; hasCredentials: boolean } | { ok: false; error: string }> {1080 if (!FIREFOX_USE_CONTENT_SCRIPT_PROXY) {1081 return { ok: false, error: "not_applicable" };1082 }1083 1084 1085 1086 if (!callerOrigin || !isValidRpId(payload.rpId, callerOrigin)) {1087 return { ok: true, hasCredentials: false };1088 }1089 if (!vault.isUnlocked()) {1090 1091 1092 1093 return { ok: true, hasCredentials: false };1094 }1095 const passkeys = listPasskeyEntries().filter(1096 (entry) => entry.passkey.rpId === payload.rpId1097 );1098 if (passkeys.length === 0) return { ok: true, hasCredentials: false };10991100 const allow = payload.allowCredentials ?? [];1101 if (allow.length === 0) return { ok: true, hasCredentials: true };11021103 const hasMatch = passkeys.some((entry) =>1104 allow.some((ac) => ac.id === entry.passkey.credentialId)1105 );1106 return { ok: true, hasCredentials: hasMatch };1107}110811091110111111121113111411151116async function requestFirefoxApproval(args: {1117 type: "create" | "get";1118 rpId: string;1119 rpName?: string;1120 userName: string;1121 userDisplayName?: string;1122}): Promise<boolean> {1123 1124 1125 const requestId = randomRequestId();1126 return promptUserApproval({1127 requestId,1128 type: args.type,1129 rpId: args.rpId,1130 rpName: args.rpName ?? args.rpId,1131 userName: args.userName,1132 userDisplayName: args.userDisplayName,1133 });1134}11351136export async function handleFirefoxPasskeyCreate(1137 payload: FirefoxPasskeyCreatePayload,1138 callerOrigin?: string,1139): Promise<FirefoxPasskeyResult<FirefoxCreateCredentialResponse>> {1140 if (!FIREFOX_USE_CONTENT_SCRIPT_PROXY) {1141 return { ok: false, error: "not_applicable" };1142 }1143 1144 1145 1146 1147 1148 assertOriginOwnsRpId(payload.rpId, callerOrigin, payload.clientDataJSON);1149 if (!(await isProUser())) {1150 broadcastPasskeyProGate();1151 return { ok: false, error: "pro_required" };1152 }1153 if (!vault.isUnlocked()) {1154 await openApprovalPopup();1155 return { ok: false, error: "vault_locked" };1156 }11571158 const algorithm = pickPasskeyAlgorithm(payload.pubKeyCredParams ?? []);1159 if (!algorithm) {1160 return { ok: false, error: "internal_error", message: "No supported algorithm offered" };1161 }11621163 const approved = await requestFirefoxApproval({1164 type: "create",1165 rpId: payload.rpId,1166 rpName: payload.rpName,1167 userName: payload.userName,1168 userDisplayName: payload.userDisplayName,1169 });1170 if (!approved) return { ok: false, error: "user_cancelled" };11711172 const { bytes: credentialIdBytes, base64url: credentialId } = generateCredentialId();1173 const { publicKeyCose, publicKeySpki, privateKeyJwk } = await generatePasskeyKeypair(algorithm);11741175 1176 1177 const authenticatorData = await buildAuthenticatorData({1178 rpId: payload.rpId,1179 flags: 0x45,1180 signCount: 0,1181 credentialId: credentialIdBytes,1182 publicKeyCose,1183 });1184 const attestationObject = createAttestationObject(authenticatorData);11851186 const passkey: PasskeyData = {1187 rpId: payload.rpId,1188 rpName: payload.rpName ?? payload.rpId,1189 credentialId,1190 publicKeyCose: base64urlEncode(publicKeyCose),1191 privateKeyJwk,1192 userHandle: payload.userId,1193 userName: payload.userName,1194 userDisplayName: payload.userDisplayName ?? payload.userName,1195 algorithm,1196 signCount: 0,1197 aaguid: base64urlEncode(new Uint8Array(16)),1198 backupEligible: false,1199 backupState: false,1200 browser: "firefox",1201 transports: ["internal"],1202 createdAt: Date.now(),1203 };12041205 const target = findAttachTarget(payload.rpId);1206 if (target) {1207 await vault.updateEntry(target.id, { passkey });1208 } else {1209 await vault.addEntry({1210 type: "login",1211 title: payload.rpName || payload.rpId,1212 url: `https://${payload.rpId}`,1213 username: payload.userName,1214 passkey,1215 });1216 }1217 await vault.consolidatePasskeyEntries();12181219 return {1220 ok: true,1221 credential: {1222 type: "create",1223 id: credentialId,1224 1225 1226 1227 clientDataJSON: payload.clientDataJSON,1228 attestationObject: base64urlEncode(attestationObject),1229 authenticatorData: base64urlEncode(authenticatorData),1230 publicKey: base64urlEncode(publicKeySpki),1231 algorithm,1232 },1233 };1234}12351236export async function handleFirefoxPasskeyGet(1237 payload: FirefoxPasskeyGetPayload,1238 callerOrigin?: string,1239): Promise<FirefoxPasskeyResult<FirefoxGetCredentialResponse>> {1240 if (!FIREFOX_USE_CONTENT_SCRIPT_PROXY) {1241 return { ok: false, error: "not_applicable" };1242 }1243 1244 1245 1246 1247 1248 1249 assertOriginOwnsRpId(payload.rpId, callerOrigin, payload.clientDataJSON);1250 if (!(await isProUser())) {1251 broadcastPasskeyProGate();1252 return { ok: false, error: "pro_required" };1253 }1254 if (!vault.isUnlocked()) {1255 await openApprovalPopup();1256 return { ok: false, error: "vault_locked" };1257 }12581259 const allow = payload.allowCredentials ?? [];1260 const candidates = listPasskeyEntries().filter((entry) => {1261 if (entry.passkey.rpId !== payload.rpId) return false;1262 if (allow.length === 0) return true;1263 return allow.some((ac) => ac.id === entry.passkey.credentialId);1264 });12651266 if (candidates.length === 0) return { ok: false, error: "no_credentials" };12671268 1269 1270 1271 candidates.sort((a, b) => (b.passkey.lastUsedAt ?? 0) - (a.passkey.lastUsedAt ?? 0));1272 const match = candidates[0]!;1273 const credential = match.passkey;12741275 if (!credential.privateKeyJwk) {1276 1277 1278 1279 return { ok: false, error: "no_credentials" };1280 }12811282 const approved = await requestFirefoxApproval({1283 type: "get",1284 rpId: credential.rpId,1285 rpName: credential.rpName,1286 userName: credential.userName,1287 userDisplayName: credential.userDisplayName,1288 });1289 if (!approved) return { ok: false, error: "user_cancelled" };12901291 const nextSignCount = credential.signCount + 1;1292 1293 1294 const flags =1295 0x05 |1296 (credential.backupEligible ? 0x08 : 0) |1297 (credential.backupState ? 0x10 : 0);1298 const authenticatorData = await buildAuthenticatorData({1299 rpId: credential.rpId,1300 flags,1301 signCount: nextSignCount,1302 });13031304 1305 1306 1307 const clientDataBytes = new Uint8Array(payload.clientDataJSON);1308 const clientDataHash = new Uint8Array(1309 await crypto.subtle.digest("SHA-256", clientDataBytes)1310 );1311 const signature = await signPasskeyAssertion(1312 credential.privateKeyJwk,1313 credential.algorithm,1314 authenticatorData,1315 clientDataHash1316 );13171318 await vault.updateEntry(match.id, {1319 passkey: {1320 ...credential,1321 signCount: nextSignCount,1322 lastUsedAt: Date.now(),1323 },1324 });13251326 return {1327 ok: true,1328 credential: {1329 type: "get",1330 id: credential.credentialId,1331 clientDataJSON: payload.clientDataJSON,1332 authenticatorData: base64urlEncode(authenticatorData),1333 signature: base64urlEncode(signature),1334 userHandle: credential.userHandle,1335 },1336 };1337}13381339export async function setupPasskeyProxy(): Promise<void> {1340 if (!isPasskeySupported()) {1341 return;1342 }13431344 1345 1346 if (detectSharedBrowser() === "firefox") {1347 await refreshPasskeyProxy();1348 return;1349 }13501351 if (!listenersRegistered) {1352 chrome.webAuthenticationProxy.onIsUvpaaRequest.addListener((requestInfo) => {1353 1354 1355 1356 1357 1358 1359 void chrome.webAuthenticationProxy.completeIsUvpaaRequest({1360 requestId: requestInfo.requestId,1361 isUvpaa: true,1362 });1363 });1364 chrome.webAuthenticationProxy.onCreateRequest.addListener((requestInfo) => {1365 void handleCreateRequest(requestInfo).catch(async (error) => {1366 1367 1368 1369 if (isInvalidRequestIdError(error)) {1370 return;1371 }1372 console.error("Peach passkey create failed", error);1373 await rejectCreate(1374 requestInfo.requestId,1375 "UnknownError",1376 error instanceof Error ? error.message : "Passkey creation failed."1377 );1378 });1379 });1380 chrome.webAuthenticationProxy.onGetRequest.addListener((requestInfo) => {1381 void handleGetRequest(requestInfo).catch(async (error) => {1382 if (isInvalidRequestIdError(error)) {1383 return;1384 }1385 console.error("Peach passkey get failed", error);1386 await rejectGet(1387 requestInfo.requestId,1388 "UnknownError",1389 error instanceof Error ? error.message : "Passkey authentication failed."1390 );1391 });1392 });1393 chrome.webAuthenticationProxy.onRequestCanceled.addListener((requestId) => {1394 markCancelled(requestId);1395 1396 const waiter = unlockWaiters.get(requestId);1397 if (waiter) {1398 clearTimeout(waiter.timeoutId);1399 waiter.resolve(false);1400 unlockWaiters.delete(requestId);1401 }1402 void resolvePendingPasskeyRequest(requestId, false);1403 });1404 listenersRegistered = true;1405 }14061407 await refreshPasskeyProxy();1408}