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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { NetUtil } from "resource://gre/modules/NetUtil.sys.mjs";
+
+/** This little class ensures that redirects maintain an https:// origin */
+function RedirectHttpsOnly() {}
+
+RedirectHttpsOnly.prototype = {
+ asyncOnChannelRedirect(oldChannel, newChannel, flags, callback) {
+ if (newChannel.URI.scheme !== "https") {
+ callback.onRedirectVerifyCallback(Cr.NS_ERROR_ABORT);
+ } else {
+ callback.onRedirectVerifyCallback(Cr.NS_OK);
+ }
+ },
+
+ getInterface(iid) {
+ return this.QueryInterface(iid);
+ },
+ QueryInterface: ChromeUtils.generateQI(["nsIChannelEventSink"]),
+};
+
+/** This class loads a resource into a single string. ResourceLoader.load() is
+ * the entry point. */
+function ResourceLoader(res, rej) {
+ this.resolve = res;
+ this.reject = rej;
+ this.data = "";
+}
+
+/** Loads the identified https:// URL. */
+ResourceLoader.load = function (uri, doc) {
+ return new Promise((resolve, reject) => {
+ let listener = new ResourceLoader(resolve, reject);
+ let ioChannel = NetUtil.newChannel({
+ uri,
+ loadingNode: doc,
+ securityFlags: Ci.nsILoadInfo.SEC_ALLOW_CROSS_ORIGIN_SEC_CONTEXT_IS_NULL,
+ contentPolicyType: Ci.nsIContentPolicy.TYPE_INTERNAL_SCRIPT,
+ });
+
+ ioChannel.loadGroup = doc.documentLoadGroup.QueryInterface(Ci.nsILoadGroup);
+ ioChannel.notificationCallbacks = new RedirectHttpsOnly();
+ ioChannel.asyncOpen(listener);
+ });
+};
+
+ResourceLoader.prototype = {
+ onDataAvailable(request, input, offset, count) {
+ let stream = Cc["@mozilla.org/scriptableinputstream;1"].createInstance(
+ Ci.nsIScriptableInputStream
+ );
+ stream.init(input);
+ this.data += stream.read(count);
+ },
+
+ onStartRequest(request) {},
+
+ onStopRequest(request, status) {
+ if (Components.isSuccessCode(status)) {
+ var statusCode = request.QueryInterface(Ci.nsIHttpChannel).responseStatus;
+ if (statusCode === 200) {
+ this.resolve({ request, data: this.data });
+ } else {
+ this.reject(new Error("Non-200 response from server: " + statusCode));
+ }
+ } else {
+ this.reject(new Error("Load failed: " + status));
+ }
+ },
+
+ getInterface(iid) {
+ return this.QueryInterface(iid);
+ },
+ QueryInterface: ChromeUtils.generateQI(["nsIStreamListener"]),
+};
+
+/**
+ * A simple implementation of the WorkerLocation interface.
+ */
+function createLocationFromURI(uri) {
+ return {
+ href: uri.spec,
+ protocol: uri.scheme + ":",
+ host: uri.host + (uri.port >= 0 ? ":" + uri.port : ""),
+ port: uri.port,
+ hostname: uri.host,
+ pathname: uri.pathQueryRef.replace(/[#\?].*/, ""),
+ search: uri.pathQueryRef.replace(/^[^\?]*/, "").replace(/#.*/, ""),
+ hash: uri.hasRef ? "#" + uri.ref : "",
+ origin: uri.prePath,
+ toString() {
+ return uri.spec;
+ },
+ };
+}
+
+/**
+ * A javascript sandbox for running an IdP.
+ *
+ * @param domain (string) the domain of the IdP
+ * @param protocol (string?) the protocol of the IdP [default: 'default']
+ * @param win (obj) the current window
+ * @throws if the domain or protocol aren't valid
+ */
+export function IdpSandbox(domain, protocol, win) {
+ this.source = IdpSandbox.createIdpUri(domain, protocol || "default");
+ this.active = null;
+ this.sandbox = null;
+ this.window = win;
+}
+
+IdpSandbox.checkDomain = function (domain) {
+ if (!domain || typeof domain !== "string") {
+ throw new Error(
+ "Invalid domain for identity provider: " +
+ "must be a non-zero length string"
+ );
+ }
+};
+
+/**
+ * Checks that the IdP protocol is superficially sane. In particular, we don't
+ * want someone adding relative paths (e.g., '../../myuri'), which could be used
+ * to move outside of /.well-known/ and into space that they control.
+ */
+IdpSandbox.checkProtocol = function (protocol) {
+ let message = "Invalid protocol for identity provider: ";
+ if (!protocol || typeof protocol !== "string") {
+ throw new Error(message + "must be a non-zero length string");
+ }
+ if (decodeURIComponent(protocol).match(/[\/\\]/)) {
+ throw new Error(message + "must not include '/' or '\\'");
+ }
+};
+
+/**
+ * Turns a domain and protocol into a URI. This does some aggressive checking
+ * to make sure that we aren't being fooled somehow. Throws on fooling.
+ */
+IdpSandbox.createIdpUri = function (domain, protocol) {
+ IdpSandbox.checkDomain(domain);
+ IdpSandbox.checkProtocol(protocol);
+
+ let message = "Invalid IdP parameters: ";
+ try {
+ let wkIdp = "https://" + domain + "/.well-known/idp-proxy/" + protocol;
+ let uri = Services.io.newURI(wkIdp);
+
+ if (uri.hostPort !== domain) {
+ throw new Error(message + "domain is invalid");
+ }
+ if (uri.pathQueryRef.indexOf("/.well-known/idp-proxy/") !== 0) {
+ throw new Error(message + "must produce a /.well-known/idp-proxy/ URI");
+ }
+
+ return uri;
+ } catch (e) {
+ if (
+ typeof e.result !== "undefined" &&
+ e.result === Cr.NS_ERROR_MALFORMED_URI
+ ) {
+ throw new Error(message + "must produce a valid URI");
+ }
+ throw e;
+ }
+};
+
+IdpSandbox.prototype = {
+ isSame(domain, protocol) {
+ return this.source.spec === IdpSandbox.createIdpUri(domain, protocol).spec;
+ },
+
+ start() {
+ if (!this.active) {
+ this.active = ResourceLoader.load(this.source, this.window.document).then(
+ result => this._createSandbox(result)
+ );
+ }
+ return this.active;
+ },
+
+ // Provides the sandbox with some useful facilities. Initially, this is only
+ // a minimal set; it is far easier to add more as the need arises, than to
+ // take them back if we discover a mistake.
+ _populateSandbox(uri) {
+ this.sandbox.location = Cu.cloneInto(
+ createLocationFromURI(uri),
+ this.sandbox,
+ { cloneFunctions: true }
+ );
+ },
+
+ _createSandbox(result) {
+ let principal = Services.scriptSecurityManager.getChannelResultPrincipal(
+ result.request
+ );
+
+ this.sandbox = Cu.Sandbox(principal, {
+ sandboxName: "IdP-" + this.source.host,
+ wantComponents: false,
+ wantExportHelpers: false,
+ wantGlobalProperties: [
+ "indexedDB",
+ "XMLHttpRequest",
+ "TextEncoder",
+ "TextDecoder",
+ "URL",
+ "URLSearchParams",
+ "atob",
+ "btoa",
+ "Blob",
+ "crypto",
+ "rtcIdentityProvider",
+ "fetch",
+ ],
+ });
+ let registrar = this.sandbox.rtcIdentityProvider;
+ if (!Cu.isXrayWrapper(registrar)) {
+ throw new Error("IdP setup failed");
+ }
+
+ // have to use the ultimate URI, not the starting one to avoid
+ // that origin stealing from the one that redirected to it
+ this._populateSandbox(result.request.URI);
+ try {
+ Cu.evalInSandbox(
+ result.data,
+ this.sandbox,
+ "latest",
+ result.request.URI.spec,
+ 1
+ );
+ } catch (e) {
+ // These can be passed straight on, because they are explicitly labelled
+ // as being IdP errors by the IdP and we drop line numbers as a result.
+ if (e.name === "IdpError" || e.name === "IdpLoginError") {
+ throw e;
+ }
+ this._logError(e);
+ throw new Error("Error in IdP, check console for details");
+ }
+
+ if (!registrar.hasIdp) {
+ throw new Error("IdP failed to call rtcIdentityProvider.register()");
+ }
+ return registrar;
+ },
+
+ // Capture all the details from the error and log them to the console. This
+ // can't rethrow anything else because that could leak information about the
+ // internal workings of the IdP across origins.
+ _logError(e) {
+ let winID = this.window.windowGlobalChild.innerWindowId;
+ let scriptError = Cc["@mozilla.org/scripterror;1"].createInstance(
+ Ci.nsIScriptError
+ );
+ scriptError.initWithWindowID(
+ e.message,
+ e.fileName,
+ null,
+ e.lineNumber,
+ e.columnNumber,
+ Ci.nsIScriptError.errorFlag,
+ "content javascript",
+ winID
+ );
+ Services.console.logMessage(scriptError);
+ },
+
+ stop() {
+ if (this.sandbox) {
+ Cu.nukeSandbox(this.sandbox);
+ }
+ this.sandbox = null;
+ this.active = null;
+ },
+
+ toString() {
+ return this.source.spec;
+ },
+};