passport-cas

Cas authentication strategies for Passport.

Install

$ npm install passport-cas

Configure Strategy

passport.use(new (require('passport-cas').Strategy)({
  ssoBaseURL: 'http://www.example.com/',
  serverBaseURL: 'http://localhost:3000'
}, function(login, done) {
  User.findOne({login: login}, function (err, user) {
    if (err) {
      return done(err);
    }
    if (!user) {
      return done(null, false, {message: 'Unknown user'});
    }
    return done(null, user);
  });
}));

Authenticate Requests

passport.authenticate('cas', function (err, user, info) {
  if (err) {
    return next(err);
  }

  if (!user) {
    req.session.messages = info.message;
    return res.redirect('/');
  }

  req.logIn(user, function (err) {
    if (err) {
      return next(err);
    }

    req.session.messages = '';
    return res.redirect('/');
  });
})

For example:

// GET: '/cas_login'
exports.casLogin = function(req, res, next) {
  passport.authenticate('cas', function (err, user, info) {
    if (err) {
      return next(err);
    }

    if (!user) {
      req.session.messages = info.message;
      return res.redirect('/');
    }

    req.logIn(user, function (err) {
      if (err) {
        return next(err);
      }

      req.session.messages = '';
      return res.redirect('/');
    });
  })(req, res, next);
};

CAS versions

CAS 3.0 configuration

Since CAS3.0, the validation service returns a list of attributes for the authenticated user. Here is how you can use them:

passport.use(new (require('passport-cas').Strategy)({
  version: 'CAS3.0',
  ssoBaseURL: 'http://www.example.com/',
  serverBaseURL: 'http://localhost:3000'
}, function(profile, done) {
  var login = profile.user;

  User.findOne({login: login}, function (err, user) {
    if (err) {
      return done(err);
    }
    if (!user) {
      return done(null, false, {message: 'Unknown user'});
    }
    user.attributes = profile.attributes;
    return done(null, user);
  });
}));

CAS 2.0 configuration

CAS 2.0 will work with the CAS 3.0 configuration, but you need to set the validation endpoint.

passport.use(new (require('passport-cas').Strategy)({
  version: 'CAS3.0',
  ssoBaseURL: 'http://www.example.com/',
  serverBaseURL: 'http://localhost:3000/cas',
  validateURL: '/serviceValidate'
}, function(profile, done) {
  var login = profile.user;

  User.findOne({login: login}, function (err, user) {
    if (err) {
      return done(err);
    }
    if (!user) {
      return done(null, false, {message: 'Unknown user'});
    }
    return done(null, user);
  });
}));

License

The MIT License