gecko-dev/toolkit/identity/RelyingParty.jsm

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/* -*- Mode: js2; js2-basic-offset: 2; indent-tabs-mode: nil; -*- */
/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
/* 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/. */
"use strict";
const Cu = Components.utils;
const Ci = Components.interfaces;
const Cc = Components.classes;
const Cr = Components.results;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/identity/LogUtils.jsm");
Cu.import("resource://gre/modules/identity/IdentityUtils.jsm");
Cu.import("resource://gre/modules/identity/IdentityStore.jsm");
this.EXPORTED_SYMBOLS = ["RelyingParty"];
XPCOMUtils.defineLazyModuleGetter(this,
"jwcrypto",
"resource://gre/modules/identity/jwcrypto.jsm");
function log(...aMessageArgs) {
Logger.log.apply(Logger, ["RP"].concat(aMessageArgs));
}
function reportError(...aMessageArgs) {
Logger.reportError.apply(Logger, ["RP"].concat(aMessageArgs));
}
function IdentityRelyingParty() {
// The store is a singleton shared among Identity, RelyingParty, and
// IdentityProvider. The Identity module takes care of resetting
// state in the _store on shutdown.
this._store = IdentityStore;
this.reset();
}
IdentityRelyingParty.prototype = {
QueryInterface: XPCOMUtils.generateQI([Ci.nsISupports, Ci.nsIObserver]),
observe: function observe(aSubject, aTopic, aData) {
switch (aTopic) {
case "quit-application-granted":
Services.obs.removeObserver(this, "quit-application-granted");
this.shutdown();
break;
}
},
reset: function RP_reset() {
// Forget all documents that call in. (These are sometimes
// referred to as callers.)
this._rpFlows = {};
},
shutdown: function RP_shutdown() {
this.reset();
Services.obs.removeObserver(this, "quit-application-granted");
},
/**
* Register a listener for a given windowID as a result of a call to
* navigator.id.watch().
*
* @param aCaller
* (Object) an object that represents the caller document, and
* is expected to have properties:
* - id (unique, e.g. uuid)
* - loggedInUser (string or null)
* - origin (string)
*
* and a bunch of callbacks
* - doReady()
* - doLogin()
* - doLogout()
* - doError()
* - doCancel()
*
*/
watch: function watch(aRpCaller) {
this._rpFlows[aRpCaller.id] = aRpCaller;
let origin = aRpCaller.origin;
let state = this._store.getLoginState(origin) || { isLoggedIn: false, email: null };
log("watch: rpId:", aRpCaller.id,
"origin:", origin,
"loggedInUser:", aRpCaller.loggedInUser,
"loggedIn:", state.isLoggedIn,
"email:", state.email);
// If the user is already logged in, then there are three cases
// to deal with:
//
// 1. the email is valid and unchanged: 'ready'
// 2. the email is null: 'login'; 'ready'
// 3. the email has changed: 'login'; 'ready'
if (state.isLoggedIn) {
if (state.email && aRpCaller.loggedInUser === state.email) {
this._notifyLoginStateChanged(aRpCaller.id, state.email);
return aRpCaller.doReady();
} else if (aRpCaller.loggedInUser === null) {
// Generate assertion for existing login
let options = {loggedInUser: state.email, origin: origin};
return this._doLogin(aRpCaller, options);
} else {
// A loggedInUser different from state.email has been specified.
// Change login identity.
let options = {loggedInUser: state.email, origin: origin};
return this._doLogin(aRpCaller, options);
}
// If the user is not logged in, there are two cases:
//
// 1. a logged in email was provided: 'ready'; 'logout'
// 2. not logged in, no email given: 'ready';
} else {
if (aRpCaller.loggedInUser) {
return this._doLogout(aRpCaller, {origin: origin});
} else {
return aRpCaller.doReady();
}
}
},
/**
* A utility for watch() to set state and notify the dom
* on login
*
* Note that this calls _getAssertion
*/
_doLogin: function _doLogin(aRpCaller, aOptions, aAssertion) {
log("_doLogin: rpId:", aRpCaller.id, "origin:", aOptions.origin);
let loginWithAssertion = function loginWithAssertion(assertion) {
this._store.setLoginState(aOptions.origin, true, aOptions.loggedInUser);
this._notifyLoginStateChanged(aRpCaller.id, aOptions.loggedInUser);
aRpCaller.doLogin(assertion);
aRpCaller.doReady();
}.bind(this);
if (aAssertion) {
loginWithAssertion(aAssertion);
} else {
this._getAssertion(aOptions, function gotAssertion(err, assertion) {
if (err) {
reportError("_doLogin:", "Failed to get assertion on login attempt:", err);
this._doLogout(aRpCaller);
} else {
loginWithAssertion(assertion);
}
}.bind(this));
}
},
/**
* A utility for watch() to set state and notify the dom
* on logout.
*/
_doLogout: function _doLogout(aRpCaller, aOptions) {
log("_doLogout: rpId:", aRpCaller.id, "origin:", aOptions.origin);
let state = this._store.getLoginState(aOptions.origin) || {};
state.isLoggedIn = false;
this._notifyLoginStateChanged(aRpCaller.id, null);
aRpCaller.doLogout();
aRpCaller.doReady();
},
/**
* For use with login or logout, emit 'identity-login-state-changed'
*
* The notification will send the rp caller id in the properties,
* and the email of the user in the message.
*
* @param aRpCallerId
* (integer) The id of the RP caller
*
* @param aIdentity
* (string) The email of the user whose login state has changed
*/
_notifyLoginStateChanged: function _notifyLoginStateChanged(aRpCallerId, aIdentity) {
log("_notifyLoginStateChanged: rpId:", aRpCallerId, "identity:", aIdentity);
let options = {rpId: aRpCallerId};
Services.obs.notifyObservers({wrappedJSObject: options},
"identity-login-state-changed",
aIdentity);
},
/**
* Initiate a login with user interaction as a result of a call to
* navigator.id.request().
*
* @param aRPId
* (integer) the id of the doc object obtained in .watch()
*
* @param aOptions
* (Object) options including privacyPolicy, termsOfService
*/
request: function request(aRPId, aOptions) {
log("request: rpId:", aRPId);
let rp = this._rpFlows[aRPId];
// Notify UX to display identity picker.
// Pass the doc id to UX so it can pass it back to us later.
let options = {rpId: aRPId, origin: rp.origin};
objectCopy(aOptions, options);
// Append URLs after resolving
let baseURI = Services.io.newURI(rp.origin, null, null);
for (let optionName of ["privacyPolicy", "termsOfService"]) {
if (aOptions[optionName]) {
options[optionName] = baseURI.resolve(aOptions[optionName]);
}
}
Services.obs.notifyObservers({wrappedJSObject: options}, "identity-request", null);
},
/**
* Invoked when a user wishes to logout of a site (for instance, when clicking
* on an in-content logout button).
*
* @param aRpCallerId
* (integer) the id of the doc object obtained in .watch()
*
*/
logout: function logout(aRpCallerId) {
log("logout: RP caller id:", aRpCallerId);
let rp = this._rpFlows[aRpCallerId];
if (rp && rp.origin) {
let origin = rp.origin;
log("logout: origin:", origin);
this._doLogout(rp, {origin: origin});
} else {
log("logout: no RP found with id:", aRpCallerId);
}
// We don't delete this._rpFlows[aRpCallerId], because
// the user might log back in again.
},
getDefaultEmailForOrigin: function getDefaultEmailForOrigin(aOrigin) {
let identities = this.getIdentitiesForSite(aOrigin);
let result = identities.lastUsed || null;
log("getDefaultEmailForOrigin:", aOrigin, "->", result);
return result;
},
/**
* Return the list of identities a user may want to use to login to aOrigin.
*/
getIdentitiesForSite: function getIdentitiesForSite(aOrigin) {
let rv = { result: [] };
for (let id in this._store.getIdentities()) {
rv.result.push(id);
}
let loginState = this._store.getLoginState(aOrigin);
if (loginState && loginState.email)
rv.lastUsed = loginState.email;
return rv;
},
/**
* Obtain a BrowserID assertion with the specified characteristics.
*
* @param aCallback
* (Function) Callback to be called with (err, assertion) where 'err'
* can be an Error or NULL, and 'assertion' can be NULL or a valid
* BrowserID assertion. If no callback is provided, an exception is
* thrown.
*
* @param aOptions
* (Object) An object that may contain the following properties:
*
* "audience" : The audience for which the assertion is to be
* issued. If this property is not set an exception
* will be thrown.
*
* Any properties not listed above will be ignored.
*/
_getAssertion: function _getAssertion(aOptions, aCallback) {
let audience = aOptions.origin;
let email = aOptions.loggedInUser || this.getDefaultEmailForOrigin(audience);
log("_getAssertion: audience:", audience, "email:", email);
if (!audience) {
throw "audience required for _getAssertion";
}
// We might not have any identity info for this email
if (!this._store.fetchIdentity(email)) {
this._store.addIdentity(email, null, null);
}
let cert = this._store.fetchIdentity(email)['cert'];
if (cert) {
this._generateAssertion(audience, email, function generatedAssertion(err, assertion) {
if (err) {
log("ERROR: _getAssertion:", err);
}
log("_getAssertion: generated assertion:", assertion);
return aCallback(err, assertion);
});
}
},
/**
* Generate an assertion, including provisioning via IdP if necessary,
* but no user interaction, so if provisioning fails, aCallback is invoked
* with an error.
*
* @param aAudience
* (string) web origin
*
* @param aIdentity
* (string) the email we're logging in with
*
* @param aCallback
* (function) callback to invoke on completion
* with first-positional parameter the error.
*/
_generateAssertion: function _generateAssertion(aAudience, aIdentity, aCallback) {
log("_generateAssertion: audience:", aAudience, "identity:", aIdentity);
let id = this._store.fetchIdentity(aIdentity);
if (! (id && id.cert)) {
let errStr = "Cannot generate an assertion without a certificate";
log("ERROR: _generateAssertion:", errStr);
aCallback(errStr);
return;
}
let kp = id.keyPair;
if (!kp) {
let errStr = "Cannot generate an assertion without a keypair";
log("ERROR: _generateAssertion:", errStr);
aCallback(errStr);
return;
}
jwcrypto.generateAssertion(id.cert, kp, aAudience, aCallback);
},
/**
* Clean up references to the provisioning flow for the specified RP.
*/
_cleanUpProvisionFlow: function RP_cleanUpProvisionFlow(aRPId, aProvId) {
let rp = this._rpFlows[aRPId];
if (rp) {
delete rp['provId'];
} else {
log("Error: Couldn't delete provision flow ", aProvId, " for RP ", aRPId);
}
},
};
this.RelyingParty = new IdentityRelyingParty();