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WS Federation middleware for node.js.

npm install wsfed

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

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

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

Options

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, 'http://someurl.com')
  }
}));

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.

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:

app.get('/wsfed/adfs/fs/federationserverservice.asmx',
    wsfed.federationServerService.wsdl);

app.post('/wsfed/adfs/fs/federationserverservice.asmx',
    wsfed.federationServerService.thumbprint({
      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, 'http://someurl.com')
              }
}));

Use the option extendJWT to add claims to the resulted token. jwtAlgorithm option allows to customize the algorithm used to sign tokens.

Since version 7.0.0, restrictions apply on the signature of JWT tokens:

• RSA key size must be 2048 bits or greater. (unless the not recommended and insecure option jwtAllowInsecureKeySizes is used)
• Asymmetric keys cannot be used to sign HMAC tokens.
• Key types must be valid for the signing algorithm (unless the not recommended and insecure option jwtAllowInvalidAsymmetricKeyTypes is used)

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.

Auth0

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