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    2.6.2 • Public • Published


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    Utilities for reading configuration from SAML 2.0 Metadata XML files, such as those generated by Active Directory Federation Services (ADFS).


    npm install passport-saml-metadata

    Usage Example

    const os = require('os');
    const fileCache = require('file-system-cache').default;
    const { fetch, toPassportConfig, claimsToCamelCase } = require('passport-saml-metadata');
    const SamlStrategy = require('passport-wsfed-saml2').Strategy;
    const backupStore = fileCache({ basePath: os.tmpdir() });
    const url = '';
    fetch({ url, backupStore })
      .then((reader) => {
        const config = toPassportConfig(reader);
        config.realm = 'urn:nodejs:passport-saml-metadata-example-app';
        config.protocol = 'saml2';
        passport.use('saml', new SamlStrategy(config, function(profile, done) {
          profile = claimsToCamelCase(profile, reader.claimSchema);
          done(null, profile);
        passport.serializeUser((user, done) => {
          done(null, user);
        passport.deserializeUser((user, done) => {
          done(null, user);

    See compwright/passport-saml-example for a complete reference implementation.


    fetch(config = {})

    When called, it will attempt to load the metadata XML from the supplied URL. If it fails due to a request timeout or other error, it will attempt to load from the backupStore cache.


    • client Axios instance
    • url (required) Metadata XML file URL
    • timeout Time to wait before falling back to the backupStore, in ms (default = 2000)
    • backupStore Any persistent cache adapter object with get(key) and set(key, value) methods (default = new Map())

    Additional configuration options supported:

    Returns a promise which resolves, if successful, to an instance of MetadataReader.

    toPassportConfig(reader, options = { multipleCerts: false })

    Transforms metadata extracts for use in Passport strategy configuration. The following strategies are currently supported:


    • multipleCerts (boolean): causes the full array of signing certificates to be passed to the passport config instead of assuming the last certificate is the most recent one. Note: this option is not compatible with passport-wsfed-saml2.

    claimsToCamelCase(claims, claimSchema)

    Translates the claim identifier URLs to human-friendly camelCase versions. Useful in Passport verifier functions.

    claimSchema should be an object of the following format, such as from MetadataReader.claimSchema():

      [claimURL]: {
        name: claimUrl,
        camelCase: 'claimIdentifierInCamelCase',
        description: 'Some description'


    function verifier(profile, done) {
      profile = passportSamlMetadata.claimsToCamelCase(profile, reader.claimSchema);
      done(null, profile);

    new MetadataReader(metadataXml, options)

    Options parameter details:

    • authnRequestBinding: if set to HTTP-POST, will attempt to load identityProviderUrl/logoutUrl via HTTP-POST binding in metadata, otherwise defaults to HTTP-Redirect
    • throwExceptions: if set to true, will throw upon exception

    Parses metadata XML and extracts the following properties:

    metadata(app)(config = {})

    Returns a function which sets up an Express application route to generate the metadata XML file for your application at /FederationMetadata/2007-06/FederationMetadata.xml. ADFS servers may import the resulting file to set up the relying party trust.


    • issuer (required) The unique application identifier, used to name the relying party trust; may be a URN or URL
    • callbackUrl (required) The absolute URL to redirect back to with the SAML assertion after logging in, usually https://hostname[:port]/login/callback
    • logoutCallbackUrl The absolute URL to redirect back to with the SAML assertion after logging out, usually https://hostname[:port]/logout

    See compwright/passport-saml-example for a usage example.


    npm i passport-saml-metadata

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