Initial working google auth

auth-service/node_modules/passport-oauth2/.github/FUNDING.yml

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+github: jaredhanson

auth-service/node_modules/passport-oauth2/CHANGELOG.md

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+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [1.8.0] - 2024-02-02
+### Fixed
+- Fixed intermittent "Failed to obtain access token" error by updating `oauth`
+dependency from 0.9.x to 0.10.x.  This error seems to occur more frequently on
+fast connections which get reset after receiving an access token response.
+
+## [1.7.0] - 2023-03-02
+### Added
+
+- Support for authorization response parameters encoded as HTML form values, as
+specified by [OAuth 2.0 Form Post Response Mode](https://openid.net/specs/oauth-v2-form-post-response-mode-1_0.html).
+
+## [1.6.1] - 2021-09-24
+### Fixed
+- Error in cases where the authorization server returns a successful access
+token response which is missing an `access_token` parameter.
+
+## [1.6.0] - 2021-07-01
+### Added
+
+- Support for `store: true` option to `Strategy` constructor, which initializes
+a state store capable of storing application-level state.
+- Support for `state` object passed as option to `authenticate`, which will be
+persisted in the session by state store.
+- `callbackURL` property added to metadata passed to state store.
+
+[Unreleased]: https://github.com/jaredhanson/passport-oauth2/compare/v1.7.0...HEAD
+[1.7.0]: https://github.com/jaredhanson/passport-oauth2/compare/v1.6.1...v1.7.0

auth-service/node_modules/passport-oauth2/LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2011-2016 Jared Hanson
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

auth-service/node_modules/passport-oauth2/README.md

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+# passport-oauth2
+
+General-purpose OAuth 2.0 authentication strategy for [Passport](https://www.passportjs.org/).
+
+This module lets you authenticate using OAuth 2.0 in your Node.js applications.
+By plugging into Passport, OAuth 2.0-based sign in can be easily and
+unobtrusively integrated into any application or framework that supports
+[Connect](https://github.com/senchalabs/connect#readme)-style middleware, including
+[Express](https://expressjs.com/).
+
+Note that this strategy provides generic OAuth 2.0 support.  In many cases, a
+provider-specific strategy can be used instead, which cuts down on unnecessary
+configuration, and accommodates any provider-specific quirks.  See the
+[list](https://github.com/jaredhanson/passport/wiki/Strategies) for supported
+providers.
+
+Developers who need to implement authentication against an OAuth 2.0 provider
+that is not already supported are encouraged to sub-class this strategy.  If you
+choose to open source the new provider-specific strategy, please add it to the
+list so other people can find it.
+
+<div align="center">
+
+:brain: [Understanding OAuth 2.0](https://www.passportjs.org/concepts/oauth2/?utm_source=github&utm_medium=referral&utm_campaign=passport-oauth2&utm_content=nav-concept) •
+:heart: [Sponsors](https://www.passportjs.org/sponsors/?utm_source=github&utm_medium=referral&utm_campaign=passport-oauth2&utm_content=nav-sponsors)
+
+</div>
+
+---
+
+<p align="center">
+  <sup>Advertisement</sup>
+  <br>
+  <a href="https://click.linksynergy.com/link?id=D*o7yui4/NM&offerid=507388.380582&type=2&murl=https%3A%2F%2Fwww.udemy.com%2Fcourse%2Flearn-oauth-2%2F&u1=5I2riUEiNIRjPjdjxj6X4exzu3lhRkWY0et6Y8eyT3">Learn OAuth 2.0 - Get started as an API Security Expert</a><br>Just imagine what could happen to YOUR professional career if you had skills in OAuth > 8500 satisfied students
+</p>
+
+---
+
+[![npm](https://img.shields.io/npm/v/passport-oauth2.svg)](https://www.npmjs.com/package/passport-oauth2)
+[![build](https://img.shields.io/travis/jaredhanson/passport-oauth2.svg)](https://travis-ci.org/jaredhanson/passport-oauth2)
+[![coverage](https://img.shields.io/coveralls/jaredhanson/passport-oauth2.svg)](https://coveralls.io/github/jaredhanson/passport-oauth2)
+[...](https://github.com/jaredhanson/passport-oauth2/wiki/Status)
+
+## Install
+
+    $ npm install passport-oauth2
+
+## Usage
+
+#### Configure Strategy
+
+The OAuth 2.0 authentication strategy authenticates users using a third-party
+account and OAuth 2.0 tokens.  The provider's OAuth 2.0 endpoints, as well as
+the client identifer and secret, are specified as options.  The strategy
+requires a `verify` callback, which receives an access token and profile,
+and calls `cb` providing a user.
+
+```js
+passport.use(new OAuth2Strategy({
+    authorizationURL: 'https://www.example.com/oauth2/authorize',
+    tokenURL: 'https://www.example.com/oauth2/token',
+    clientID: EXAMPLE_CLIENT_ID,
+    clientSecret: EXAMPLE_CLIENT_SECRET,
+    callbackURL: "http://localhost:3000/auth/example/callback"
+  },
+  function(accessToken, refreshToken, profile, cb) {
+    User.findOrCreate({ exampleId: profile.id }, function (err, user) {
+      return cb(err, user);
+    });
+  }
+));
+```
+
+#### Authenticate Requests
+
+Use `passport.authenticate()`, specifying the `'oauth2'` strategy, to
+authenticate requests.
+
+For example, as route middleware in an [Express](http://expressjs.com/)
+application:
+
+```js
+app.get('/auth/example',
+  passport.authenticate('oauth2'));
+
+app.get('/auth/example/callback',
+  passport.authenticate('oauth2', { failureRedirect: '/login' }),
+  function(req, res) {
+    // Successful authentication, redirect home.
+    res.redirect('/');
+  });
+```
+
+## Related Modules
+
+- [passport-oauth1](https://github.com/jaredhanson/passport-oauth1) — OAuth 1.0 authentication strategy
+- [passport-http-bearer](https://github.com/jaredhanson/passport-http-bearer) — Bearer token authentication strategy for APIs
+- [OAuth2orize](https://github.com/jaredhanson/oauth2orize) — OAuth 2.0 authorization server toolkit
+
+## Contributing
+
+#### Tests
+
+The test suite is located in the `test/` directory.  All new features are
+expected to have corresponding test cases.  Ensure that the complete test suite
+passes by executing:
+
+```bash
+$ make test
+```
+
+#### Coverage
+
+All new feature development is expected to have test coverage.  Patches that
+increse test coverage are happily accepted.  Coverage reports can be viewed by
+executing:
+
+```bash
+$ make test-cov
+$ make view-cov
+```
+
+## License
+
+[The MIT License](http://opensource.org/licenses/MIT)
+
+Copyright (c) 2011-2016 Jared Hanson <[http://jaredhanson.net/](http://jaredhanson.net/)>
+
+

auth-service/node_modules/passport-oauth2/lib/errors/authorizationerror.js

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+/**
+ * `AuthorizationError` error.
+ *
+ * AuthorizationError represents an error in response to an authorization
+ * request.  For details, refer to RFC 6749, section 4.1.2.1.
+ *
+ * References:
+ *   - [The OAuth 2.0 Authorization Framework](http://tools.ietf.org/html/rfc6749)
+ *
+ * @constructor
+ * @param {String} [message]
+ * @param {String} [code]
+ * @param {String} [uri]
+ * @param {Number} [status]
+ * @api public
+ */
+function AuthorizationError(message, code, uri, status) {
+  if (!status) {
+    switch (code) {
+      case 'access_denied': status = 403; break;
+      case 'server_error': status = 502; break;
+      case 'temporarily_unavailable': status = 503; break;
+    }
+  }
+
+  Error.call(this);
+  Error.captureStackTrace(this, this.constructor);
+  this.name = this.constructor.name;
+  this.message = message;
+  this.code = code || 'server_error';
+  this.uri = uri;
+  this.status = status || 500;
+}
+
+/**
+ * Inherit from `Error`.
+ */
+AuthorizationError.prototype.__proto__ = Error.prototype;
+
+
+/**
+ * Expose `AuthorizationError`.
+ */
+module.exports = AuthorizationError;

auth-service/node_modules/passport-oauth2/lib/errors/internaloautherror.js

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+/**
+ * `InternalOAuthError` error.
+ *
+ * InternalOAuthError wraps errors generated by node-oauth.  By wrapping these
+ * objects, error messages can be formatted in a manner that aids in debugging
+ * OAuth issues.
+ *
+ * @constructor
+ * @param {String} [message]
+ * @param {Object|Error} [err]
+ * @api public
+ */
+function InternalOAuthError(message, err) {
+  Error.call(this);
+  Error.captureStackTrace(this, this.constructor);
+  this.name = this.constructor.name;
+  this.message = message;
+  this.oauthError = err;
+}
+
+/**
+ * Inherit from `Error`.
+ */
+InternalOAuthError.prototype.__proto__ = Error.prototype;
+
+/**
+ * Returns a string representing the error.
+ *
+ * @return {String}
+ * @api public
+ */
+InternalOAuthError.prototype.toString = function() {
+  var m = this.name;
+  if (this.message) { m += ': ' + this.message; }
+  if (this.oauthError) {
+    if (this.oauthError instanceof Error) {
+      m = this.oauthError.toString();
+    } else if (this.oauthError.statusCode && this.oauthError.data) {
+      m += ' (status: ' + this.oauthError.statusCode + ' data: ' + this.oauthError.data + ')';
+    }
+  }
+  return m;
+};
+
+
+/**
+ * Expose `InternalOAuthError`.
+ */
+module.exports = InternalOAuthError;

auth-service/node_modules/passport-oauth2/lib/errors/tokenerror.js

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+/**
+ * `TokenError` error.
+ *
+ * TokenError represents an error received from a token endpoint.  For details,
+ * refer to RFC 6749, section 5.2.
+ *
+ * References:
+ *   - [The OAuth 2.0 Authorization Framework](http://tools.ietf.org/html/rfc6749)
+ *
+ * @constructor
+ * @param {String} [message]
+ * @param {String} [code]
+ * @param {String} [uri]
+ * @param {Number} [status]
+ * @api public
+ */
+function TokenError(message, code, uri, status) {
+  Error.call(this);
+  Error.captureStackTrace(this, this.constructor);
+  this.name = this.constructor.name;
+  this.message = message;
+  this.code = code || 'invalid_request';
+  this.uri = uri;
+  this.status = status || 500;
+}
+
+/**
+ * Inherit from `Error`.
+ */
+TokenError.prototype.__proto__ = Error.prototype;
+
+
+/**
+ * Expose `TokenError`.
+ */
+module.exports = TokenError;

auth-service/node_modules/passport-oauth2/lib/index.js

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+// Load modules.
+var Strategy = require('./strategy')
+  , AuthorizationError = require('./errors/authorizationerror')
+  , TokenError = require('./errors/tokenerror')
+  , InternalOAuthError = require('./errors/internaloautherror');
+
+
+// Expose Strategy.
+exports = module.exports = Strategy;
+
+// Exports.
+exports.Strategy = Strategy;
+
+exports.AuthorizationError = AuthorizationError;
+exports.TokenError = TokenError;
+exports.InternalOAuthError = InternalOAuthError;

auth-service/node_modules/passport-oauth2/lib/state/null.js

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+function NullStore(options) {
+}
+
+NullStore.prototype.store = function(req, cb) {
+  cb();
+}
+
+NullStore.prototype.verify = function(req, providedState, cb) {
+  cb(null, true);
+}
+
+
+module.exports = NullStore;

auth-service/node_modules/passport-oauth2/lib/state/pkcesession.js

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+var uid = require('uid2');
+
+/**
+ * Creates an instance of `SessionStore`.
+ *
+ * This is the state store implementation for the OAuth2Strategy used when
+ * the `state` option is enabled.  It generates a random state and stores it in
+ * `req.session` and verifies it when the service provider redirects the user
+ * back to the application.
+ *
+ * This state store requires session support.  If no session exists, an error
+ * will be thrown.
+ *
+ * Options:
+ *
+ *   - `key`  The key in the session under which to store the state
+ *
+ * @constructor
+ * @param {Object} options
+ * @api public
+ */
+function PKCESessionStore(options) {
+  if (!options.key) { throw new TypeError('Session-based state store requires a session key'); }
+  this._key = options.key;
+}
+
+/**
+ * Store request state.
+ *
+ * This implementation simply generates a random string and stores the value in
+ * the session, where it will be used for verification when the user is
+ * redirected back to the application.
+ *
+ * @param {Object} req
+ * @param {Function} callback
+ * @api protected
+ */
+PKCESessionStore.prototype.store = function(req, verifier, state, meta, callback) {
+  if (!req.session) { return callback(new Error('OAuth 2.0 authentication requires session support when using state. Did you forget to use express-session middleware?')); }
+
+  var key = this._key;
+  var sstate = {
+    handle: uid(24),
+    code_verifier: verifier
+  };
+  if (state) { sstate.state = state; }
+  if (!req.session[key]) { req.session[key] = {}; }
+  req.session[key].state = sstate;
+  callback(null, sstate.handle);
+};
+
+/**
+ * Verify request state.
+ *
+ * This implementation simply compares the state parameter in the request to the
+ * value generated earlier and stored in the session.
+ *
+ * @param {Object} req
+ * @param {String} providedState
+ * @param {Function} callback
+ * @api protected
+ */
+PKCESessionStore.prototype.verify = function(req, providedState, callback) {
+  if (!req.session) { return callback(new Error('OAuth 2.0 authentication requires session support when using state. Did you forget to use express-session middleware?')); }
+
+  var key = this._key;
+  if (!req.session[key]) {
+    return callback(null, false, { message: 'Unable to verify authorization request state.' });
+  }
+
+  var state = req.session[key].state;
+  if (!state) {
+    return callback(null, false, { message: 'Unable to verify authorization request state.' });
+  }
+
+  delete req.session[key].state;
+  if (Object.keys(req.session[key]).length === 0) {
+    delete req.session[key];
+  }
+
+  if (state.handle !== providedState) {
+    return callback(null, false, { message: 'Invalid authorization request state.' });
+  }
+
+  return callback(null, state.code_verifier, state.state);
+};
+
+// Expose constructor.
+module.exports = PKCESessionStore;

auth-service/node_modules/passport-oauth2/lib/state/session.js

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+var uid = require('uid2');
+
+/**
+ * Creates an instance of `SessionStore`.
+ *
+ * This is the state store implementation for the OAuth2Strategy used when
+ * the `state` option is enabled.  It generates a random state and stores it in
+ * `req.session` and verifies it when the service provider redirects the user
+ * back to the application.
+ *
+ * This state store requires session support.  If no session exists, an error
+ * will be thrown.
+ *
+ * Options:
+ *
+ *   - `key`  The key in the session under which to store the state
+ *
+ * @constructor
+ * @param {Object} options
+ * @api public
+ */
+function SessionStore(options) {
+  if (!options.key) { throw new TypeError('Session-based state store requires a session key'); }
+  this._key = options.key;
+}
+
+/**
+ * Store request state.
+ *
+ * This implementation simply generates a random string and stores the value in
+ * the session, where it will be used for verification when the user is
+ * redirected back to the application.
+ *
+ * @param {Object} req
+ * @param {Function} callback
+ * @api protected
+ */
+SessionStore.prototype.store = function(req, callback) {
+  if (!req.session) { return callback(new Error('OAuth 2.0 authentication requires session support when using state. Did you forget to use express-session middleware?')); }
+
+  var key = this._key;
+  var state = uid(24);
+  if (!req.session[key]) { req.session[key] = {}; }
+  req.session[key].state = state;
+  callback(null, state);
+};
+
+/**
+ * Verify request state.
+ *
+ * This implementation simply compares the state parameter in the request to the
+ * value generated earlier and stored in the session.
+ *
+ * @param {Object} req
+ * @param {String} providedState
+ * @param {Function} callback
+ * @api protected
+ */
+SessionStore.prototype.verify = function(req, providedState, callback) {
+  if (!req.session) { return callback(new Error('OAuth 2.0 authentication requires session support when using state. Did you forget to use express-session middleware?')); }
+
+  var key = this._key;
+  if (!req.session[key]) {
+    return callback(null, false, { message: 'Unable to verify authorization request state.' });
+  }
+
+  var state = req.session[key].state;
+  if (!state) {
+    return callback(null, false, { message: 'Unable to verify authorization request state.' });
+  }
+
+  delete req.session[key].state;
+  if (Object.keys(req.session[key]).length === 0) {
+    delete req.session[key];
+  }
+
+  if (state !== providedState) {
+    return callback(null, false, { message: 'Invalid authorization request state.' });
+  }
+
+  return callback(null, true);
+};
+
+// Expose constructor.
+module.exports = SessionStore;

auth-service/node_modules/passport-oauth2/lib/state/store.js

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+var uid = require('uid2');
+
+/**
+ * Creates an instance of `SessionStore`.
+ *
+ * This is the state store implementation for the OAuth2Strategy used when
+ * the `state` option is enabled.  It generates a random state and stores it in
+ * `req.session` and verifies it when the service provider redirects the user
+ * back to the application.
+ *
+ * This state store requires session support.  If no session exists, an error
+ * will be thrown.
+ *
+ * Options:
+ *
+ *   - `key`  The key in the session under which to store the state
+ *
+ * @constructor
+ * @param {Object} options
+ * @api public
+ */
+function SessionStore(options) {
+  if (!options.key) { throw new TypeError('Session-based state store requires a session key'); }
+  this._key = options.key;
+}
+
+/**
+ * Store request state.
+ *
+ * This implementation simply generates a random string and stores the value in
+ * the session, where it will be used for verification when the user is
+ * redirected back to the application.
+ *
+ * @param {Object} req
+ * @param {Function} callback
+ * @api protected
+ */
+SessionStore.prototype.store = function(req, state, meta, callback) {
+  if (!req.session) { return callback(new Error('OAuth 2.0 authentication requires session support when using state. Did you forget to use express-session middleware?')); }
+
+  var key = this._key;
+  var sstate = {
+    handle: uid(24)
+  };
+  if (state) { sstate.state = state; }
+  if (!req.session[key]) { req.session[key] = {}; }
+  req.session[key].state = sstate;
+  callback(null, sstate.handle);
+};
+
+/**
+ * Verify request state.
+ *
+ * This implementation simply compares the state parameter in the request to the
+ * value generated earlier and stored in the session.
+ *
+ * @param {Object} req
+ * @param {String} providedState
+ * @param {Function} callback
+ * @api protected
+ */
+SessionStore.prototype.verify = function(req, providedState, callback) {
+  if (!req.session) { return callback(new Error('OAuth 2.0 authentication requires session support when using state. Did you forget to use express-session middleware?')); }
+
+  var key = this._key;
+  if (!req.session[key]) {
+    return callback(null, false, { message: 'Unable to verify authorization request state.' });
+  }
+
+  var state = req.session[key].state;
+  if (!state) {
+    return callback(null, false, { message: 'Unable to verify authorization request state.' });
+  }
+
+  delete req.session[key].state;
+  if (Object.keys(req.session[key]).length === 0) {
+    delete req.session[key];
+  }
+
+  if (state.handle !== providedState) {
+    return callback(null, false, { message: 'Invalid authorization request state.' });
+  }
+
+  return callback(null, true, state.state);
+};
+
+// Expose constructor.
+module.exports = SessionStore;

auth-service/node_modules/passport-oauth2/lib/strategy.js

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+// Load modules.
+var passport = require('passport-strategy')
+  , url = require('url')
+  , uid = require('uid2')
+  , crypto = require('crypto')
+  , base64url = require('base64url')
+  , util = require('util')
+  , utils = require('./utils')
+  , OAuth2 = require('oauth').OAuth2
+  , NullStore = require('./state/null')
+  , NonceStore = require('./state/session')
+  , StateStore = require('./state/store')
+  , PKCEStateStore = require('./state/pkcesession')
+  , AuthorizationError = require('./errors/authorizationerror')
+  , TokenError = require('./errors/tokenerror')
+  , InternalOAuthError = require('./errors/internaloautherror');
+
+
+/**
+ * Creates an instance of `OAuth2Strategy`.
+ *
+ * The OAuth 2.0 authentication strategy authenticates requests using the OAuth
+ * 2.0 framework.
+ *
+ * OAuth 2.0 provides a facility for delegated authentication, whereby users can
+ * authenticate using a third-party service such as Facebook.  Delegating in
+ * this manner involves a sequence of events, including redirecting the user to
+ * the third-party service for authorization.  Once authorization has been
+ * granted, the user is redirected back to the application and an authorization
+ * code can be used to obtain credentials.
+ *
+ * Applications must supply a `verify` callback, for which the function
+ * signature is:
+ *
+ *     function(accessToken, refreshToken, profile, done) { ... }
+ *
+ * The verify callback is responsible for finding or creating the user, and
+ * invoking `done` with the following arguments:
+ *
+ *     done(err, user, info);
+ *
+ * `user` should be set to `false` to indicate an authentication failure.
+ * Additional `info` can optionally be passed as a third argument, typically
+ * used to display informational messages.  If an exception occured, `err`
+ * should be set.
+ *
+ * Options:
+ *
+ *   - `authorizationURL`  URL used to obtain an authorization grant
+ *   - `tokenURL`          URL used to obtain an access token
+ *   - `clientID`          identifies client to service provider
+ *   - `clientSecret`      secret used to establish ownership of the client identifer
+ *   - `callbackURL`       URL to which the service provider will redirect the user after obtaining authorization
+ *   - `passReqToCallback` when `true`, `req` is the first argument to the verify callback (default: `false`)
+ *
+ * Examples:
+ *
+ *     passport.use(new OAuth2Strategy({
+ *         authorizationURL: 'https://www.example.com/oauth2/authorize',
+ *         tokenURL: 'https://www.example.com/oauth2/token',
+ *         clientID: '123-456-789',
+ *         clientSecret: 'shhh-its-a-secret'
+ *         callbackURL: 'https://www.example.net/auth/example/callback'
+ *       },
+ *       function(accessToken, refreshToken, profile, done) {
+ *         User.findOrCreate(..., function (err, user) {
+ *           done(err, user);
+ *         });
+ *       }
+ *     ));
+ *
+ * @constructor
+ * @param {Object} options
+ * @param {Function} verify
+ * @api public
+ */
+function OAuth2Strategy(options, verify) {
+  if (typeof options == 'function') {
+    verify = options;
+    options = undefined;
+  }
+  options = options || {};
+
+  if (!verify) { throw new TypeError('OAuth2Strategy requires a verify callback'); }
+  if (!options.authorizationURL) { throw new TypeError('OAuth2Strategy requires a authorizationURL option'); }
+  if (!options.tokenURL) { throw new TypeError('OAuth2Strategy requires a tokenURL option'); }
+  if (!options.clientID) { throw new TypeError('OAuth2Strategy requires a clientID option'); }
+
+  passport.Strategy.call(this);
+  this.name = 'oauth2';
+  this._verify = verify;
+
+  // NOTE: The _oauth2 property is considered "protected".  Subclasses are
+  //       allowed to use it when making protected resource requests to retrieve
+  //       the user profile.
+  this._oauth2 = new OAuth2(options.clientID,  options.clientSecret,
+                            '', options.authorizationURL, options.tokenURL, options.customHeaders);
+
+  this._callbackURL = options.callbackURL;
+  this._scope = options.scope;
+  this._scopeSeparator = options.scopeSeparator || ' ';
+  this._pkceMethod = (options.pkce === true) ? 'S256' : options.pkce;
+  this._key = options.sessionKey || ('oauth2:' + url.parse(options.authorizationURL).hostname);
+
+  if (options.store && typeof options.store == 'object') {
+    this._stateStore = options.store;
+  } else if (options.store) {
+    this._stateStore = options.pkce ? new PKCEStateStore({ key: this._key }) : new StateStore({ key: this._key });
+  } else if (options.state) {
+    this._stateStore = options.pkce ? new PKCEStateStore({ key: this._key }) : new NonceStore({ key: this._key });
+  } else {
+    if (options.pkce) { throw new TypeError('OAuth2Strategy requires `state: true` option when PKCE is enabled'); }
+    this._stateStore = new NullStore();
+  }
+  this._trustProxy = options.proxy;
+  this._passReqToCallback = options.passReqToCallback;
+  this._skipUserProfile = (options.skipUserProfile === undefined) ? false : options.skipUserProfile;
+}
+
+// Inherit from `passport.Strategy`.
+util.inherits(OAuth2Strategy, passport.Strategy);
+
+
+/**
+ * Authenticate request by delegating to a service provider using OAuth 2.0.
+ *
+ * @param {Object} req
+ * @api protected
+ */
+OAuth2Strategy.prototype.authenticate = function(req, options) {
+  options = options || {};
+  var self = this;
+
+  if (req.query && req.query.error) {
+    if (req.query.error == 'access_denied') {
+      return this.fail({ message: req.query.error_description });
+    } else {
+      return this.error(new AuthorizationError(req.query.error_description, req.query.error, req.query.error_uri));
+    }
+  }
+
+  var callbackURL = options.callbackURL || this._callbackURL;
+  if (callbackURL) {
+    var parsed = url.parse(callbackURL);
+    if (!parsed.protocol) {
+      // The callback URL is relative, resolve a fully qualified URL from the
+      // URL of the originating request.
+      callbackURL = url.resolve(utils.originalURL(req, { proxy: this._trustProxy }), callbackURL);
+    }
+  }
+
+  var meta = {
+    authorizationURL: this._oauth2._authorizeUrl,
+    tokenURL: this._oauth2._accessTokenUrl,
+    clientID: this._oauth2._clientId,
+    callbackURL: callbackURL
+  }
+
+  if ((req.query && req.query.code) || (req.body && req.body.code)) {
+    function loaded(err, ok, state) {
+      if (err) { return self.error(err); }
+      if (!ok) {
+        return self.fail(state, 403);
+      }
+
+      var code = (req.query && req.query.code) || (req.body && req.body.code);
+
+      var params = self.tokenParams(options);
+      params.grant_type = 'authorization_code';
+      if (callbackURL) { params.redirect_uri = callbackURL; }
+      if (typeof ok == 'string') { // PKCE
+        params.code_verifier = ok;
+      }
+
+      self._oauth2.getOAuthAccessToken(code, params,
+        function(err, accessToken, refreshToken, params) {
+          if (err) { return self.error(self._createOAuthError('Failed to obtain access token', err)); }
+          if (!accessToken) { return self.error(new Error('Failed to obtain access token')); }
+
+          self._loadUserProfile(accessToken, function(err, profile) {
+            if (err) { return self.error(err); }
+
+            function verified(err, user, info) {
+              if (err) { return self.error(err); }
+              if (!user) { return self.fail(info); }
+
+              info = info || {};
+              if (state) { info.state = state; }
+              self.success(user, info);
+            }
+
+            try {
+              if (self._passReqToCallback) {
+                var arity = self._verify.length;
+                if (arity == 6) {
+                  self._verify(req, accessToken, refreshToken, params, profile, verified);
+                } else { // arity == 5
+                  self._verify(req, accessToken, refreshToken, profile, verified);
+                }
+              } else {
+                var arity = self._verify.length;
+                if (arity == 5) {
+                  self._verify(accessToken, refreshToken, params, profile, verified);
+                } else { // arity == 4
+                  self._verify(accessToken, refreshToken, profile, verified);
+                }
+              }
+            } catch (ex) {
+              return self.error(ex);
+            }
+          });
+        }
+      );
+    }
+
+    var state = (req.query && req.query.state) || (req.body && req.body.state);
+    try {
+      var arity = this._stateStore.verify.length;
+      if (arity == 4) {
+        this._stateStore.verify(req, state, meta, loaded);
+      } else { // arity == 3
+        this._stateStore.verify(req, state, loaded);
+      }
+    } catch (ex) {
+      return this.error(ex);
+    }
+  } else {
+    var params = this.authorizationParams(options);
+    params.response_type = 'code';
+    if (callbackURL) { params.redirect_uri = callbackURL; }
+    var scope = options.scope || this._scope;
+    if (scope) {
+      if (Array.isArray(scope)) { scope = scope.join(this._scopeSeparator); }
+      params.scope = scope;
+    }
+    var verifier, challenge;
+
+    if (this._pkceMethod) {
+      verifier = base64url(crypto.pseudoRandomBytes(32))
+      switch (this._pkceMethod) {
+      case 'plain':
+        challenge = verifier;
+        break;
+      case 'S256':
+        challenge = base64url(crypto.createHash('sha256').update(verifier).digest());
+        break;
+      default:
+        return this.error(new Error('Unsupported code verifier transformation method: ' + this._pkceMethod));
+      }
+      
+      params.code_challenge = challenge;
+      params.code_challenge_method = this._pkceMethod;
+    }
+
+    var state = options.state;
+    if (state && typeof state == 'string') {
+      // NOTE: In passport-oauth2@1.5.0 and earlier, `state` could be passed as
+      //       an object.  However, it would result in an empty string being
+      //       serialized as the value of the query parameter by `url.format()`,
+      //       effectively ignoring the option.  This implies that `state` was
+      //       only functional when passed as a string value.
+      //
+      //       This fact is taken advantage of here to fall into the `else`
+      //       branch below when `state` is passed as an object.  In that case
+      //       the state will be automatically managed and persisted by the
+      //       state store.
+      params.state = state;
+      
+      var parsed = url.parse(this._oauth2._authorizeUrl, true);
+      utils.merge(parsed.query, params);
+      parsed.query['client_id'] = this._oauth2._clientId;
+      delete parsed.search;
+      var location = url.format(parsed);
+      this.redirect(location);
+    } else {
+      function stored(err, state) {
+        if (err) { return self.error(err); }
+
+        if (state) { params.state = state; }
+        var parsed = url.parse(self._oauth2._authorizeUrl, true);
+        utils.merge(parsed.query, params);
+        parsed.query['client_id'] = self._oauth2._clientId;
+        delete parsed.search;
+        var location = url.format(parsed);
+        self.redirect(location);
+      }
+
+      try {
+        var arity = this._stateStore.store.length;
+        if (arity == 5) {
+          this._stateStore.store(req, verifier, state, meta, stored);
+        } else if (arity == 4) {
+          this._stateStore.store(req, state, meta, stored);
+        } else if (arity == 3) {
+          this._stateStore.store(req, meta, stored);
+        } else { // arity == 2
+          this._stateStore.store(req, stored);
+        }
+      } catch (ex) {
+        return this.error(ex);
+      }
+    }
+  }
+};
+
+/**
+ * Retrieve user profile from service provider.
+ *
+ * OAuth 2.0-based authentication strategies can overrride this function in
+ * order to load the user's profile from the service provider.  This assists
+ * applications (and users of those applications) in the initial registration
+ * process by automatically submitting required information.
+ *
+ * @param {String} accessToken
+ * @param {Function} done
+ * @api protected
+ */
+OAuth2Strategy.prototype.userProfile = function(accessToken, done) {
+  return done(null, {});
+};
+
+/**
+ * Return extra parameters to be included in the authorization request.
+ *
+ * Some OAuth 2.0 providers allow additional, non-standard parameters to be
+ * included when requesting authorization.  Since these parameters are not
+ * standardized by the OAuth 2.0 specification, OAuth 2.0-based authentication
+ * strategies can overrride this function in order to populate these parameters
+ * as required by the provider.
+ *
+ * @param {Object} options
+ * @return {Object}
+ * @api protected
+ */
+OAuth2Strategy.prototype.authorizationParams = function(options) {
+  return {};
+};
+
+/**
+ * Return extra parameters to be included in the token request.
+ *
+ * Some OAuth 2.0 providers allow additional, non-standard parameters to be
+ * included when requesting an access token.  Since these parameters are not
+ * standardized by the OAuth 2.0 specification, OAuth 2.0-based authentication
+ * strategies can overrride this function in order to populate these parameters
+ * as required by the provider.
+ *
+ * @return {Object}
+ * @api protected
+ */
+OAuth2Strategy.prototype.tokenParams = function(options) {
+  return {};
+};
+
+/**
+ * Parse error response from OAuth 2.0 endpoint.
+ *
+ * OAuth 2.0-based authentication strategies can overrride this function in
+ * order to parse error responses received from the token endpoint, allowing the
+ * most informative message to be displayed.
+ *
+ * If this function is not overridden, the body will be parsed in accordance
+ * with RFC 6749, section 5.2.
+ *
+ * @param {String} body
+ * @param {Number} status
+ * @return {Error}
+ * @api protected
+ */
+OAuth2Strategy.prototype.parseErrorResponse = function(body, status) {
+  var json = JSON.parse(body);
+  if (json.error) {
+    return new TokenError(json.error_description, json.error, json.error_uri);
+  }
+  return null;
+};
+
+/**
+ * Load user profile, contingent upon options.
+ *
+ * @param {String} accessToken
+ * @param {Function} done
+ * @api private
+ */
+OAuth2Strategy.prototype._loadUserProfile = function(accessToken, done) {
+  var self = this;
+
+  function loadIt() {
+    return self.userProfile(accessToken, done);
+  }
+  function skipIt() {
+    return done(null);
+  }
+
+  if (typeof this._skipUserProfile == 'function' && this._skipUserProfile.length > 1) {
+    // async
+    this._skipUserProfile(accessToken, function(err, skip) {
+      if (err) { return done(err); }
+      if (!skip) { return loadIt(); }
+      return skipIt();
+    });
+  } else {
+    var skip = (typeof this._skipUserProfile == 'function') ? this._skipUserProfile() : this._skipUserProfile;
+    if (!skip) { return loadIt(); }
+    return skipIt();
+  }
+};
+
+/**
+ * Create an OAuth error.
+ *
+ * @param {String} message
+ * @param {Object|Error} err
+ * @api private
+ */
+OAuth2Strategy.prototype._createOAuthError = function(message, err) {
+  var e;
+  if (err.statusCode && err.data) {
+    try {
+      e = this.parseErrorResponse(err.data, err.statusCode);
+    } catch (_) {}
+  }
+  if (!e) { e = new InternalOAuthError(message, err); }
+  return e;
+};
+
+
+// Expose constructor.
+module.exports = OAuth2Strategy;

auth-service/node_modules/passport-oauth2/lib/utils.js

@@ -0,0 +1,32 @@
+exports.merge = require('utils-merge');
+
+/**
+ * Reconstructs the original URL of the request.
+ *
+ * This function builds a URL that corresponds the original URL requested by the
+ * client, including the protocol (http or https) and host.
+ *
+ * If the request passed through any proxies that terminate SSL, the
+ * `X-Forwarded-Proto` header is used to detect if the request was encrypted to
+ * the proxy, assuming that the proxy has been flagged as trusted.
+ *
+ * @param {http.IncomingMessage} req
+ * @param {Object} [options]
+ * @return {String}
+ * @api private
+ */
+exports.originalURL = function(req, options) {
+  options = options || {};
+  var app = req.app;
+  if (app && app.get && app.get('trust proxy')) {
+    options.proxy = true;
+  }
+  var trustProxy = options.proxy;
+  
+  var proto = (req.headers['x-forwarded-proto'] || '').toLowerCase()
+    , tls = req.connection.encrypted || (trustProxy && 'https' == proto.split(/\s*,\s*/)[0])
+    , host = (trustProxy && req.headers['x-forwarded-host']) || req.headers.host
+    , protocol = tls ? 'https' : 'http'
+    , path = req.url || '';
+  return protocol + '://' + host + path;
+};

auth-service/node_modules/passport-oauth2/package.json

@@ -0,0 +1,59 @@
+{
+  "name": "passport-oauth2",
+  "version": "1.8.0",
+  "description": "OAuth 2.0 authentication strategy for Passport.",
+  "keywords": [
+    "passport",
+    "auth",
+    "authn",
+    "authentication",
+    "authz",
+    "authorization",
+    "oauth",
+    "oauth2"
+  ],
+  "author": {
+    "name": "Jared Hanson",
+    "email": "jaredhanson@gmail.com",
+    "url": "http://www.jaredhanson.net/"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/jaredhanson/passport-oauth2.git"
+  },
+  "bugs": {
+    "url": "http://github.com/jaredhanson/passport-oauth2/issues"
+  },
+  "funding": {
+    "type": "github",
+    "url": "https://github.com/sponsors/jaredhanson"
+  },
+  "license": "MIT",
+  "licenses": [
+    {
+      "type": "MIT",
+      "url": "http://opensource.org/licenses/MIT"
+    }
+  ],
+  "main": "./lib",
+  "dependencies": {
+    "base64url": "3.x.x",
+    "oauth": "0.10.x",
+    "passport-strategy": "1.x.x",
+    "uid2": "0.0.x",
+    "utils-merge": "1.x.x"
+  },
+  "devDependencies": {
+    "make-node": "0.4.6",
+    "mocha": "2.x.x",
+    "chai": "2.x.x",
+    "proxyquire": "0.6.x",
+    "chai-passport-strategy": "1.x.x"
+  },
+  "engines": {
+    "node": ">= 0.4.0"
+  },
+  "scripts": {
+    "test": "node_modules/.bin/mocha --reporter spec --require test/bootstrap/node test/*.test.js test/**/*.test.js"
+  }
+}