passport saml how to pass profile data to route - express

Question

when I created passport-saml strategy, during login, there is a profile object pass to the middleware function, with nameID info there. I need that info to call logout later on.
// passportHandler.js
const passport = require("passport");
const passportSaml = require("passport-saml");
passport.serializeUser((user, done) => {
done(null, user);
});
passport.deserializeUser((user, done) => {
done(null, user);
});
// SAML strategy for passport -- Single IPD
const samlStrategy = new passportSaml.Strategy(
{
entryPoint: process.env.SSO_ENTRYPOINT,
logoutUrl: process.env.SSO_LOGOUT,
issuer: process.env.SSO_ISSUER,
callbackUrl: process.env.SSO_CALLBACK_URL || undefined,
path: process.env.path,
cert: process.env.SSO_CERT.replace(/\\n/gm, "\n"), // change "\n" into real line break
},
(profile, done) => {
console.log('profile', profile); // nameID and nameIDFormat are in profile object
done(null, profile)
}
);
passport.use(samlStrategy);
module.exports = passport;
index.js
// index.js of Express server
import passport from "./src/passportHandler";
import { getLogout } from "./src/routes.js";
const app = express();
app.use(passport.initialize());
app.use(passport.session());
app.get('/sso/logout', getLogout); // this route, I need the above 2 data
getLogout function import from another file, I hardcode nameID and nameIDFormat, how do I get them from the beginning profile object, save them somewhere, and pass them to this route?
// routes.js
export const getLogout = (req, res) => {
!req.user && (req.user = {})
req.user.nameID = 'Eric1234#outlook.onmicrosoft.com'; // hardcode, how to pass this info?
req.user.nameIDFormat = 'urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress'; // hardcode too
const samlStrategy = req._passport?.instance?._strategies?.saml; // is this correct?
samlStrategy.logout(req, (err, request) => {
if (!err) {
res.redirect(request);
}
})
};
my second question is, I get the samlStrategy object from req._passport?.instance?._strategies?.saml, is it a proper way to get it? or, again the similar question, how can I pass saml strategy obj from the beginning create logic to this route?
thanks for any help!

Answer 1

answering my own silly question...
in samlStrategy, at last calling done(null, profile)
const samlStrategy = new passportSaml.Strategy(
{
entryPoint: process.env.SSO_ENTRYPOINT,
logoutUrl: process.env.SSO_LOGOUT,
issuer: process.env.SSO_ISSUER,
callbackUrl: process.env.SSO_CALLBACK_URL || undefined,
path: process.env.path,
cert: process.env.SSO_CERT.replace(/\\n/gm, "\n"), // change "\n" into real line break
},
(profile, done) => {
console.log('profile', profile); // nameID and nameIDFormat are in profile object
done(null, profile)
}
);
then the profile object will become req.user object in the Service Provider's Login Post Callback function
Then I can save the user object somewhere, and use it again when logout being called.