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[EC-598] feat: polyfill platform authenticator support

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This commit is contained in:
Andreas Coroiu 2023-04-28 10:19:15 +02:00
parent 0e528f35f0
commit c3ce8d87f0
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1 changed files with 23 additions and 7 deletions
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30
apps/browser/src/fido2/content/page-script.ts
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@ -3,9 +3,13 @@ import { WebauthnUtils } from "../../browser/webauthn-utils";
import { MessageType } from "./messaging/message";
import { Messenger } from "./messaging/messenger";
const browserNativeWebauthnSupport = window.PublicKeyCredential == undefined;
const BrowserPublicKeyCredential = window.PublicKeyCredential;
const browserNativeWebauthnSupport = window.PublicKeyCredential != undefined;
// eslint-disable-next-line @typescript-eslint/no-unused-vars
let browserNativeWebauthnPlatformAuthenticatorSupport = false;
if (!browserNativeWebauthnSupport) {
// Polyfill webauthn in browser without support
// Polyfill webauthn support
try {
// credentials is read-only if supported, use type-casting to force assignment
(navigator as any).credentials = {
@ -16,21 +20,33 @@ if (!browserNativeWebauthnSupport) {
throw new Error("Webauthn not supported in this browser.");
},
};
// We will be replacing this class with our own implementation when responding
window.PublicKeyCredential = class {} as any;
window.PublicKeyCredential = class {
static isUserVerifyingPlatformAuthenticatorAvailable() {
return Promise.resolve(true);
}
} as any;
} catch {
/* empty */
}
}
window.PublicKeyCredential.isUserVerifyingPlatformAuthenticatorAvailable = async () => true;
if (browserNativeWebauthnSupport) {
BrowserPublicKeyCredential.isUserVerifyingPlatformAuthenticatorAvailable().then((available) => {
browserNativeWebauthnPlatformAuthenticatorSupport = available;
if (!available) {
// Polyfill platform authenticator support
window.PublicKeyCredential.isUserVerifyingPlatformAuthenticatorAvailable = () =>
Promise.resolve(true);
}
});
}
const browserCredentials = {
create: navigator.credentials.create.bind(
navigator.credentials
) as typeof navigator.credentials.create,
get: navigator.credentials.get.bind(navigator.credentials) as typeof navigator.credentials.get,
isUserVerifyingPlatformAuthenticatorAvailable:
window.PublicKeyCredential.isUserVerifyingPlatformAuthenticatorAvailable,
};
const messenger = Messenger.forDOMCommunication(window);