Password Hash Import with Firebase's Scrypt Algorithm
Sep 10, 2025
Overview
Solution
Auth0 currently does support importing hashes with the Scrypt algorithm, and while Firebase uses Scrypt, their implementation is non-standard so these hashes are not accepted by Auth0: https://github.com/firebase/scrypt#firebase-authentication-password-hashing
It is recommended to import users without hashes or to import users through automatic migration with a Custom Database connection.
To request this functionality in a future release, submit feature requests using this form: https://auth0.com/feedback . This is a direct line to our Product team and the best way to communicate your needs.
