WSFed server middleware

Usage no npm install needed!

<script type="module">
  import wsfed from '';


WS Federation middleware for node.js.

Build Status


npm install wsfed


This middleware is meant to generate a valid WSFederation endpoint that talks saml.

The idea is that you will use another mechanism to valida the user first.

The endpoint supports metadata as well in the url /FederationMetadata/2007-06/FederationMetadata.xml.



Name Description Default
cert public key used by this identity provider REQUIRED
key private key used by this identity provider REQUIRED
getPostURL get the url to post the token f(wtrealm, wreply, req, callback) REQUIRED
issuer the name of the issuer of the token REQUIRED
audience the audience for the saml token req.query.wtrealm
getUserFromRequest how to extract the user information from request function(req) { return req.user; }
profileMapper mapper to map users to claims (see PassportProfileMapper) PassportProfileMapper
signatureAlgorithm signature algorithm, options: rsa-sha1, rsa-sha256 'rsa-sha256'
digestAlgorithm digest algorithm, options: sha1, sha256 'sha256'
wctx state of the auth process req.query.wctx

Add the middleware as follows:

app.get('/wsfed', wsfed.auth({
  issuer:     'the-issuer',
  cert:       fs.readFileSync(path.join(__dirname, 'some-cert.pem')),
  key:        fs.readFileSync(path.join(__dirname, 'some-cert.key')),
  getPostUrl: function (wtrealm, wreply, req, callback) {
                return cb( null, '')

WsFederation Metadata

wsfed can generate the metadata document for wsfederation as well. Usage as follows:

app.get('/wsfed/FederationMetadata/2007-06/FederationMetadata.xml', wsfed.metadata({
  issuer:   'the-issuer',
  cert:     fs.readFileSync(path.join(__dirname, 'some-cert.pem')),

It also accept two optionals parameters:

  • profileMapper: a class implementing the profile mapper. This is used to render the claims type information (using the metadata property). See PassportProfileMapper for more information.
  • endpointPath: this is the full path in your server to the auth route. By default the metadata handler uses the metadata request route without /FederationMetadata/2007..blabla.

WsFederation Metadata endpoints ADFS1-like

ADFS v1 uses another set of endpoints for the metadata and the thumbprint. If you have to connect an ADFS v1 client you have to do something like this:

      pkcs7: yourPkcs7,
      cert:  yourCert

notice that you need a pkcs7 with the full chain of all certificates. You can generate this with openssl as follows:

openssl crl2pkcs7 -nocrl \
    -certfile your.crt \
    -certfile another-cert-in-the-chain.crt \
    -out contoso1.p7b


By default the signed assertion is a SAML token, you can use JWT tokens as follows:

app.get('/wsfed', wsfed.auth({
  jwt:        true,
  issuer:     'the-issuer',
  key:        fs.readFileSync(path.join(__dirname, 'some-cert.key')),
  getPostUrl: function (wtrealm, wreply, req, callback) {
                return cb( null, '')

Issue Reporting

If you have found a bug or if you have a feature request, please report them at this repository issues section. Please do not report security vulnerabilities on the public GitHub issue tracker. The Responsible Disclosure Program details the procedure for disclosing security issues.




This project is licensed under the MIT license. See the LICENSE file for more info.