passport-slack-v2

Passport strategy for authenticating with Slack using the V2 OAuth 2.0 API.

Updated to support Sign in with Slack by default.

Install

$ npm install @workablehr/passport-slack-v2

Express Example

const {CLIENT_ID, CLIENT_SECRET, PORT} = process.env,
      SlackStrategy = require('passport-slack-v2').Strategy,
      passport = require('passport'),
      express = require('express'),
      app = express();

// setup the strategy using defaults 
passport.use(new SlackStrategy({
    clientID: CLIENT_ID,
    clientSecret: CLIENT_SECRET
  }, (accessToken, refreshToken, profile, done) => {
    // optionally persist profile data
    done(null, profile);
  }
));

const app = express();
app.use(passport.initialize());
app.use(express.urlencoded({ extended: true }));

// path to start the OAuth flow
app.get('/auth/slack', passport.authorize('slack'));

// OAuth callback url
app.get('/auth/slack/callback', 
  passport.authorize('slack', { failureRedirect: '/login' }),
  (req, res) => res.redirect('/')
);

app.listen(PORT);

Sample Profile

{
  "ok": true,
  "user": {
    "id": "W012A3CDE",
    "team_id": "T012AB3C4",
    "name": "spengler",
    "deleted": false,
    "color": "9f69e7",
    "real_name": "Egon Spengler",
    "tz": "America/Los_Angeles",
    "tz_label": "Pacific Daylight Time",
    "tz_offset": -25200,
    "profile": {
      "avatar_hash": "ge3b51ca72de",
      "status_text": "Print is dead",
      "status_emoji": ":books:",
      "real_name": "Egon Spengler",
      "display_name": "spengler",
      "real_name_normalized": "Egon Spengler",
      "display_name_normalized": "spengler",
      "email": "[email protected]",
      "image_original": "https://.../avatar/e3b51ca72dee4ef87916ae2b9240df50.jpg",
      "image_24": "https://.../avatar/e3b51ca72dee4ef87916ae2b9240df50.jpg",
      "image_32": "https://.../avatar/e3b51ca72dee4ef87916ae2b9240df50.jpg",
      "image_48": "https://.../avatar/e3b51ca72dee4ef87916ae2b9240df50.jpg",
      "image_72": "https://.../avatar/e3b51ca72dee4ef87916ae2b9240df50.jpg",
      "image_192": "https://.../avatar/e3b51ca72dee4ef87916ae2b9240df50.jpg",
      "image_512": "https://.../avatar/e3b51ca72dee4ef87916ae2b9240df50.jpg",
      "team": "T012AB3C4"
    },
    "is_admin": true,
    "is_owner": false,
    "is_primary_owner": false,
    "is_restricted": false,
    "is_ultra_restricted": false,
    "is_bot": false,
    "updated": 1502138686,
    "is_app_user": false,
    "has_2fa": false
  }
}

Usage

Configure the Strategy

The Slack authentication strategy authenticates users using a Slack account and OAuth 2.0 tokens. The strategy requires a verify callback, which accepts these credentials and calls done providing a user, as well as options specifying a client ID, client secret, and callback URL.

passport.use(new SlackStrategy({
    clientID: CLIENT_ID,
    clientSecret: CLIENT_SECRET,
    skipUserProfile: false, // default
    scope: [],
    user_scope: [],
    passReqToCallback: true
  },
  (accessToken, refreshToken, profile, done) => {
    // optionally persist user data into a database
    done(null, profile);
  }
));

Authentication Requests

Use passport.authenticate() (or passport.authorize() if you want to authenticate with Slack and NOT affect req.user and the user session), specifying the 'slack' strategy, to authenticate requests.

For example, as route middleware in an Express application:

app.get('/auth/slack', passport.authorize('Slack'));

app.get('/auth/slack/callback',
  passport.authenticate('slack', { failureRedirect: '/login' }),
  (req, res) => res.redirect('/') // Successful authentication, redirect home.
);

Custom Scopes

User Scopes

By default, the passport-slack-v2 strategy attempts to retrieve the user's identity from Slack. This action requires at least the following scopes users:read and users:read.email.

passport.use(new SlackStrategy({
	clientID: CLIENT_ID,
	clientSecret: CLIENT_SECRET,
	user_scope: ['users:read', 'users:read.email']
}, () => { }));

Bot Scopes

For bot scopes, set the scope parameter to an array of the desired scopes.

passport.use(new SlackStrategy({
	clientID: CLIENT_ID,
	clientSecret: CLIENT_SECRET,
	scope: ['channels:manage', 'groups:write', 'im:write', 'mpim:write']
}, () => { }));

Ignore Profile Info

If you only need an access token and no user profile data, you can avoid getting profile information by setting skipUserProfile to true.

passport.use(new SlackStrategy({
	clientID: CLIENT_ID,
	clientSecret: CLIENT_SECRET,
	scope: ['incoming-webhook'],
	skipUserProfile: true
}, () => { });

Thanks

• Jared Hanson
• Michael Pearson

License

The MIT License