node.js - Firebase custom token authentication (firebase version 3) -

i have authentication server (nodejs) authenticate user , create custom firebase token

   var token = firebase.auth().createcustomtoken(userid);  

i used able verify user token (previous version), not simple...

i decoded userid token

  firebase.auth().verifyidtoken(token).then(function).... 

does not work server generated custom tokens.

does know how done?

you should using jsonwebtoken validate token in case. need pass firebase private key additional parameter.

var jwt = require('jsonwebtoken'); var fbprivatekey = //your firebase key string here  jwt.verify(token, fbprivatekey, { algorithms: ['rs256'] }, function(err, decoded) {     console.log(decoded); //your token info available here. }); 

update:

you have use private_key .json config file set in firebase.initializeapp({ , use library convert key public pem format. can use node-rsa trick

var nodersa = require('node-rsa'); var fbprivatekey = //key .json file. var key = new nodersa(fbprivatekey).exportkey('pkcs8-public-pem'); jwt.verify(token, key, { algorithms: ['rs256'] }, function(err, decoded) {     console.log(err);     console.log(decoded); //your token info available here. });