GoogleOauth2.0 First implementation

First try for GoogleOauth2.0

express-server/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;

express-server/node_modules/passport-oauth2/lib/errors/internaloautherror.js

@@ -0,0 +1,49 @@
+/**
+ * `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;

express-server/node_modules/passport-oauth2/lib/errors/tokenerror.js

@@ -0,0 +1,36 @@
+/**
+ * `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;

express-server/node_modules/passport-oauth2/lib/index.js

@@ -0,0 +1,16 @@
+// 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;

express-server/node_modules/passport-oauth2/lib/state/null.js

@@ -0,0 +1,13 @@
+function NullStore(options) {
+}
+
+NullStore.prototype.store = function(req, cb) {
+  cb();
+}
+
+NullStore.prototype.verify = function(req, providedState, cb) {
+  cb(null, true);
+}
+
+
+module.exports = NullStore;

express-server/node_modules/passport-oauth2/lib/state/session.js

@@ -0,0 +1,85 @@
+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;

express-server/node_modules/passport-oauth2/lib/strategy.js

@@ -0,0 +1,385 @@
+// Load modules.
+var passport = require('passport-strategy')
+  , url = require('url')
+  , util = require('util')
+  , utils = require('./utils')
+  , OAuth2 = require('oauth').OAuth2
+  , NullStateStore = require('./state/null')
+  , SessionStateStore = require('./state/session')
+  , 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._key = options.sessionKey || ('oauth2:' + url.parse(options.authorizationURL).hostname);
+
+  if (options.store) {
+    this._stateStore = options.store;
+  } else {
+    if (options.state) {
+      this._stateStore = new SessionStateStore({ key: this._key });
+    } else {
+      this._stateStore = new NullStateStore();
+    }
+  }
+  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
+  }
+
+  if (req.query && req.query.code) {
+    function loaded(err, ok, state) {
+      if (err) { return self.error(err); }
+      if (!ok) {
+        return self.fail(state, 403);
+      }
+  
+      var code = req.query.code;
+
+      var params = self.tokenParams(options);
+      params.grant_type = 'authorization_code';
+      if (callbackURL) { params.redirect_uri = callbackURL; }
+
+      self._oauth2.getOAuthAccessToken(code, params,
+        function(err, accessToken, refreshToken, params) {
+          if (err) { return self.error(self._createOAuthError('Failed to obtain access token', err)); }
+
+          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.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 state = options.state;
+    if (state) {
+      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 == 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;

express-server/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;
+};