primary logic behind csrf tokens

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CSRF Tokens
Logic behind CSRF token creation and verification. Read Understanding-CSRF for more information on CSRF. Use this module to create custom CSRF middleware and what not.


var tokens = require('csrf-tokens')(options)

var secret = tokens.secretSync()
var token = tokens.create(secret)
var valid = tokens.verify(secret, token)

  • secretLength: 24 - the byte length of the secret key
  • saltLength: 8 - the string length of the salt
  • tokensize: (secret, salt) => token - a custom token creation function


Asynchronously create a new secret of length secretLength. If cb is not defined, a promise is returned. You don't have to use this.
tokens.secret().then(function (secret) {


tokens.secret(function (err, secret) {


var secret = tokens.secretSync()

Synchronous version of tokens.secret()

var token = tokens.token(secret)

Create a CSRF token based on a secret. This is the token you pass to clients.

var valid = tokens.verify(secret, token)

Check whether a CSRF token is valid based on a secret. If it's not valid, you should probably throw a 403 error.