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index.js
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/**
* Module dependencies.
*/
var util = require('util'),
OAuth2Strategy = require('passport-oauth').OAuth2Strategy,
axios = require('axios'),
pkg = require('../package.json'),
crypto = require('crypto'),
querystring = require('querystring');
function encodeClientInfo(obj) {
return Buffer.from(JSON.stringify(obj)).toString('base64');
}
var clientInfoHeader = encodeClientInfo({
name: 'passport-auth0',
version: pkg.version,
env: {
node: process.version
}
});
var Profile = require('./Profile');
var verifyWrapper = require('./verifyWrapper');
/**
* `Strategy` constructor.
*
*
* @param {Object} options
* @param {Function} verify
* @api public
*/
function Strategy(options, verify) {
['domain',
'clientID',
'clientSecret',
'callbackURL'].forEach(function (k) {
if(!options[k]){
throw new Error('You must provide the ' + k + ' configuration value to use passport-auth0.');
}
});
options.customHeaders = Object.assign(
{ 'Auth0-Client': clientInfoHeader },
typeof options.customHeaders === 'object' ? options.customHeaders : {}
);
var defaultOptions = {
expectedIssuer: 'https://' + options.domain + '/',
authorizationURL: 'https://' + options.domain + '/authorize',
tokenURL: 'https://' + options.domain + '/oauth/token',
userInfoURL: 'https://' + options.domain + '/userinfo',
apiUrl: 'https://' + options.domain + '/api'
}
this.options = Object.assign({}, defaultOptions, options);
if (this.options.state === undefined) {
this.options.state = true;
}
this._base = Object.getPrototypeOf(Strategy.prototype);
this._base.constructor.call(this, this.options, verify);
this.name = 'auth0';
}
/**
* Inherit from `OAuth2Strategy`.
*/
util.inherits(Strategy, OAuth2Strategy);
Strategy.prototype.authenticate = function (req, options) {
if (req.query && req.query.error) {
return this.fail(req.query.error);
}
if (this.options.state) {
if (!req.session) {
throw new Error('Auth0Strategy requires you set state to false when no session is present')
}
if (req.query.code) {
// If the code parameter is present, authenticate() is being called on the callback route.
this._verify = verifyWrapper(this._verify, this.options, req.session.authParams);
} else {
// If the code parameter is not present, authenticate() is being called on the login route.
req.session.authParams = {};
req.session.authParams.scope = options.scope;
req.session.authParams.nonce = crypto.randomBytes(16).toString('hex');
this.authParams = req.session.authParams
}
} else if (options.scope && options.scope.includes('openid')) {
throw new Error('Scope "openid" is not allowed without Auth0Strategy state true')
}
this._base.authenticate.call(this, req, options);
};
Strategy.prototype.authorizationParams = function(options) {
var options = options || {};
var params = Object.assign({}, options);
/*
You might wonder why we have delete statements here?
The objective is to make it possible for consumers to use the API like this:
passport.authenticate('auth0', {
scope: 'openid email profile',
'my_custom_extra_param': true // <== An extra param
})
To keep the validation of all expected options, we therefore take a copy
and delete the "reserved" options. This leaves us with any extra params.
When node.js version 6 is dropped at one point, this can be done in a single
line of code 😇
const {connection, connection_scope, audience, prompt, login_hint, acr_value, nonce, max_age, ...theRest} = options;
*/
delete params.connection;
delete params.connection_scope;
delete params.audience;
delete params.prompt;
delete params.login_hint;
delete params.acr_values;
delete params.nonce;
delete params.max_age;
if (options.connection && typeof options.connection === 'string') {
params.connection = options.connection;
if (options.connection_scope && typeof options.connection_scope === 'string') {
params.connection_scope = options.connection_scope;
}
}
if (options.audience && typeof options.audience === 'string') {
params.audience = options.audience;
}
if (options.prompt && typeof options.prompt === 'string') {
params.prompt = options.prompt;
}
if (options.login_hint && typeof options.login_hint === 'string') {
params.login_hint = options.login_hint;
}
if (options.acr_values && typeof options.acr_values === 'string') {
params.acr_values = options.acr_values;
}
var strategyOptions = this.options;
if (strategyOptions && typeof strategyOptions.maxAge === 'number') {
params.max_age = strategyOptions.maxAge;
}
if (this.authParams && typeof this.authParams.nonce === 'string') {
params.nonce = this.authParams.nonce;
}
return params;
};
/**
* @deprecated An Access Token is already included as part of the verify callback passed to Auth0Strategy.
*/
Strategy.prototype._getAccessToken = function(done){
var body = {
'client_id': this.options.clientID,
'client_secret': this.options.clientSecret,
'type': 'web_server',
'grant_type': 'client_credentials'
};
axios({
method: 'POST',
url: this.options.tokenURL,
data: querystring.stringify(body),
headers: {
'Auth0-Client': clientInfoHeader
}
})
.then((response) => done(null, response.data['access_token'], response.data['id_token']))
.catch((err) => done(err));
};
/**
* Retrieve user profile from Auth0.
*
* This function constructs a normalized profile, with the following properties:
*
* - `provider` this is the strategy (google-oauth2, google, office365, google-apps)
* - `id` this is the user_id of the auth0 profile
* - `username` this is the nickname of the auth0 profile
* - `displayName`
*
* @param {String} accessToken
* @param {Function} done
* @api protected
*/
Strategy.prototype.userProfile = function(accessToken, done) {
this._oauth2.get(this.options.userInfoURL, accessToken, function (err, body, res) {
if (err) { return done(new Error('failed to fetch user profile', err)); }
try {
var json = JSON.parse(body);
var profile = new Profile(json, body);
done(null, profile);
} catch(e) {
done(e);
}
});
};
/**
* Expose `Strategy` directly from package.
*/
exports = module.exports = Strategy;
/**
* Export constructors.
*/
exports.Strategy = Strategy;