Revert WebAuthn iFrame handler (#462)

common/src/misc/webauthn_iframe.ts

@@ -1,30 +1,87 @@
 import { I18nService } from '../abstractions/i18n.service';
 import { PlatformUtilsService } from '../abstractions/platformUtils.service';
 
-import { IFrameComponent } from './iframe_component';
+export class WebAuthnIFrame {
-import { Utils } from './utils';
+    private iframe: HTMLIFrameElement = null;
+    private connectorLink: HTMLAnchorElement;
+    private parseFunction = this.parseMessage.bind(this);
 
-export class WebAuthnIFrame extends IFrameComponent {
+    constructor(private win: Window, private webVaultUrl: string, private webAuthnNewTab: boolean,
-    constructor(win: Window, webVaultUrl: string, private webAuthnNewTab: boolean,
         private platformUtilsService: PlatformUtilsService, private i18nService: I18nService,
-        successCallback: (message: string) => any, errorCallback: (message: string) => any,
+        private successCallback: Function, private errorCallback: Function, private infoCallback: Function) {
-        infoCallback: (message: string) => any) {
+        this.connectorLink = win.document.createElement('a');
-        super(win, webVaultUrl, 'webauthn-connector.html', 'webauthn_iframe', successCallback, errorCallback, infoCallback);
     }
 
-
     init(data: any): void {
-        const params = this.createParams({ data: JSON.stringify(data), btnText: this.i18nService.t('webAuthnAuthenticate') }, 2);
+        const params = new URLSearchParams({
+            data: this.base64Encode(JSON.stringify(data)),
+            parent: encodeURIComponent(this.win.document.location.href),
+            btnText: encodeURIComponent(this.i18nService.t('webAuthnAuthenticate')),
+            v: '1',
+        });
 
         if (this.webAuthnNewTab) {
             // Firefox fallback which opens the webauthn page in a new tab
             params.append('locale', this.i18nService.translationLocale);
             this.platformUtilsService.launchUri(`${this.webVaultUrl}/webauthn-fallback-connector.html?${params}`);
         } else {
-            super.initComponent(params);
+            this.connectorLink.href = `${this.webVaultUrl}/webauthn-connector.html?${params}`;
-            if (Utils.isNullOrWhitespace(this.iframe.allow)) {
+            this.iframe = this.win.document.getElementById('webauthn_iframe') as HTMLIFrameElement;
             this.iframe.allow = 'publickey-credentials-get ' + new URL(this.webVaultUrl).origin;
+            this.iframe.src = this.connectorLink.href;
+
+            this.win.addEventListener('message', this.parseFunction, false);
         }
     }
+
+    stop() {
+        this.sendMessage('stop');
+    }
+
+    start() {
+        this.sendMessage('start');
+    }
+
+    sendMessage(message: any) {
+        if (!this.iframe || !this.iframe.src || !this.iframe.contentWindow) {
+            return;
+        }
+
+        this.iframe.contentWindow.postMessage(message, this.iframe.src);
+    }
+
+    base64Encode(str: string): string {
+        return btoa(encodeURIComponent(str).replace(/%([0-9A-F]{2})/g, (match, p1) => {
+            return String.fromCharCode(('0x' + p1) as any);
+        }));
+    }
+
+    cleanup() {
+        this.win.removeEventListener('message', this.parseFunction, false);
+    }
+
+    private parseMessage(event: MessageEvent) {
+        if (!this.validMessage(event)) {
+            return;
+        }
+
+        const parts: string[] = event.data.split('|');
+        if (parts[0] === 'success' && this.successCallback) {
+            this.successCallback(parts[1]);
+        } else if (parts[0] === 'error' && this.errorCallback) {
+            this.errorCallback(parts[1]);
+        } else if (parts[0] === 'info' && this.infoCallback) {
+            this.infoCallback(parts[1]);
+        }
+    }
+
+    private validMessage(event: MessageEvent) {
+        if (event.origin == null || event.origin === '' || event.origin !== (this.connectorLink as any).origin ||
+            event.data == null || typeof (event.data) !== 'string') {
+            return false;
+        }
+
+        return event.data.indexOf('success|') === 0 || event.data.indexOf('error|') === 0 ||
+            event.data.indexOf('info|') === 0;
     }
 }