gecko/services/fxaccounts/FxAccountsOAuthClient.jsm

270 lines
8.8 KiB
JavaScript

/* 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/. */
/**
* Firefox Accounts OAuth browser login helper.
* Uses the WebChannel component to receive OAuth messages and complete login flows.
*/
this.EXPORTED_SYMBOLS = ["FxAccountsOAuthClient"];
const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Log.jsm");
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/FxAccountsCommon.js");
XPCOMUtils.defineLazyModuleGetter(this, "WebChannel",
"resource://gre/modules/WebChannel.jsm");
Cu.importGlobalProperties(["URL"]);
/**
* Create a new FxAccountsOAuthClient for browser some service.
*
* @param {Object} options Options
* @param {Object} options.parameters
* Opaque alphanumeric token to be included in verification links
* @param {String} options.parameters.client_id
* OAuth id returned from client registration
* @param {String} options.parameters.state
* A value that will be returned to the client as-is upon redirection
* @param {String} options.parameters.oauth_uri
* The FxA OAuth server uri
* @param {String} options.parameters.content_uri
* The FxA Content server uri
* @param {String} [options.parameters.scope]
* Optional. A colon-separated list of scopes that the user has authorized
* @param {String} [options.parameters.action]
* Optional. If provided, should be either signup, signin or force_auth.
* @param {String} [options.parameters.email]
* Optional. Required if options.paramters.action is 'force_auth'.
* @param {Boolean} [options.parameters.keys]
* Optional. If true then relier-specific encryption keys will be
* available in the second argument to onComplete.
* @param [authorizationEndpoint] {String}
* Optional authorization endpoint for the OAuth server
* @constructor
*/
this.FxAccountsOAuthClient = function(options) {
this._validateOptions(options);
this.parameters = options.parameters;
this._configureChannel();
let authorizationEndpoint = options.authorizationEndpoint || "/authorization";
try {
this._fxaOAuthStartUrl = new URL(this.parameters.oauth_uri + authorizationEndpoint + "?");
} catch (e) {
throw new Error("Invalid OAuth Url");
}
let params = this._fxaOAuthStartUrl.searchParams;
params.append("client_id", this.parameters.client_id);
params.append("state", this.parameters.state);
params.append("scope", this.parameters.scope || "");
params.append("action", this.parameters.action || "signin");
params.append("webChannelId", this._webChannelId);
if (this.parameters.keys) {
params.append("keys", "true");
}
// Only append if we actually have a value.
if (this.parameters.email) {
params.append("email", this.parameters.email);
}
};
this.FxAccountsOAuthClient.prototype = {
/**
* Function that gets called once the OAuth flow is complete.
* The callback will receive an object with code and state properties.
* If the keys parameter was specified and true, the callback will receive
* a second argument with kAr and kBr properties.
*/
onComplete: null,
/**
* Function that gets called if there is an error during the OAuth flow,
* for example due to a state mismatch.
* The callback will receive an Error object as its argument.
*/
onError: null,
/**
* Configuration object that stores all OAuth parameters.
*/
parameters: null,
/**
* WebChannel that is used to communicate with content page.
*/
_channel: null,
/**
* Boolean to indicate if this client has completed an OAuth flow.
*/
_complete: false,
/**
* The url that opens the Firefox Accounts OAuth flow.
*/
_fxaOAuthStartUrl: null,
/**
* WebChannel id.
*/
_webChannelId: null,
/**
* WebChannel origin, used to validate origin of messages.
*/
_webChannelOrigin: null,
/**
* Opens a tab at "this._fxaOAuthStartUrl".
* Registers a WebChannel listener and sets up a callback if needed.
*/
launchWebFlow: function () {
if (!this._channelCallback) {
this._registerChannel();
}
if (this._complete) {
throw new Error("This client already completed the OAuth flow");
} else {
let opener = Services.wm.getMostRecentWindow("navigator:browser").gBrowser;
opener.selectedTab = opener.addTab(this._fxaOAuthStartUrl.href);
}
},
/**
* Release all resources that are in use.
*/
tearDown: function() {
this.onComplete = null;
this.onError = null;
this._complete = true;
this._channel.stopListening();
this._channel = null;
},
/**
* Configures WebChannel id and origin
*
* @private
*/
_configureChannel: function() {
this._webChannelId = "oauth_" + this.parameters.client_id;
// if this.parameters.content_uri is present but not a valid URI, then this will throw an error.
try {
this._webChannelOrigin = Services.io.newURI(this.parameters.content_uri, null, null);
} catch (e) {
throw e;
}
},
/**
* Create a new channel with the WebChannelBroker, setup a callback listener
* @private
*/
_registerChannel: function() {
/**
* Processes messages that are called back from the FxAccountsChannel
*
* @param webChannelId {String}
* Command webChannelId
* @param message {Object}
* Command message
* @param sendingContext {Object}
* Channel message event sendingContext
* @private
*/
let listener = function (webChannelId, message, sendingContext) {
if (message) {
let command = message.command;
let data = message.data;
let target = sendingContext && sendingContext.browser;
switch (command) {
case "oauth_complete":
// validate the returned state and call onComplete or onError
let result = null;
let err = null;
if (this.parameters.state !== data.state) {
err = new Error("OAuth flow failed. State doesn't match");
} else if (this.parameters.keys && !data.keys) {
err = new Error("OAuth flow failed. Keys were not returned");
} else {
result = {
code: data.code,
state: data.state
};
}
// if the message asked to close the tab
if (data.closeWindow && target) {
// for e10s reasons the best way is to use the TabBrowser to close the tab.
let tabbrowser = target.getTabBrowser();
if (tabbrowser) {
let tab = tabbrowser.getTabForBrowser(target);
if (tab) {
tabbrowser.removeTab(tab);
log.debug("OAuth flow closed the tab.");
} else {
log.debug("OAuth flow failed to close the tab. Tab not found in TabBrowser.");
}
} else {
log.debug("OAuth flow failed to close the tab. TabBrowser not found.");
}
}
if (err) {
log.debug(err.message);
if (this.onError) {
this.onError(err);
}
} else {
log.debug("OAuth flow completed.");
if (this.onComplete) {
if (this.parameters.keys) {
this.onComplete(result, data.keys);
} else {
this.onComplete(result);
}
}
}
// onComplete will be called for this client only once
// calling onComplete again will result in a failure of the OAuth flow
this.tearDown();
break;
}
}
};
this._channelCallback = listener.bind(this);
this._channel = new WebChannel(this._webChannelId, this._webChannelOrigin);
this._channel.listen(this._channelCallback);
log.debug("Channel registered: " + this._webChannelId + " with origin " + this._webChannelOrigin.prePath);
},
/**
* Validates the required FxA OAuth parameters
*
* @param options {Object}
* OAuth client options
* @private
*/
_validateOptions: function (options) {
if (!options || !options.parameters) {
throw new Error("Missing 'parameters' configuration option");
}
["oauth_uri", "client_id", "content_uri", "state"].forEach(option => {
if (!options.parameters[option]) {
throw new Error("Missing 'parameters." + option + "' parameter");
}
});
if (options.parameters.action == "force_auth" && !options.parameters.email) {
throw new Error("parameters.email is required for action 'force_auth'");
}
},
};