Single-Sign-On (SSO) server with multiple factor authentication

Single-Sign-On (SSO) server with multiple factor authentication

Single Sign On server, OAuth2, Openid Connect, multiple factor authentication with, HOTP/TOTP, FIDO2, TLS Certificates, etc. extensible via plugins

Glewlwyd SSO server

Single-Sign-On (SSO) server with multiple factor authentication.

logged in

Authentication process supported:

  • OAuth2
  • OpenID Connect

Allows users authentication via multiple factors:

  • Password
  • One-time password (TOTP/HOTP)
  • WebAuthn (Yubikey, Android devices)
  • One-time password sent via e-mail
  • TLS Certificate
  • External OAuth2/OIDC providers
  • HTTP Backend service providing Basic Authentication

Users and clients can be stored and managed from various backends:

  • Database
  • LDAP service
  • HTTP Backend service providing Basic Authentication

New users can register a new account with the possibility to confirm their e-mail address or not. During the registration process, the new user may be expected to register their passwords, as well as other authentication factors:

  • One-time password (TOTP/HOTP)
  • WebAuthn (Yubikey, Android devices)
  • TLS Certificate
  • External OAuth2/OIDC providers

Existing users can update their e-mail by sending a confirmation link to the new e-mail.

Existing users can reset their credentials if their password or authentication schemes are lost or unavailable. Credentials can be reset by different factors:

  • A link sent to the user's e-mail
  • A one-time use secret code

See the register/update e-mail/reset credentials documentation for more information on the registration, update e-mail or reset credentials features.

Based on a plugin architecture to make it easier to add or update storage backends, authentication schemes or process.

Allows passwordless authentication.

Adding new authentication schemes or backend storage for users and clients is possible via the plugin architecture.

The backend API server is fully written in C and uses a small amount of resources.

Its plugin architecture makes it easy to add new modules or plugins, or modify existing ones with less risks to have unmaintainable code.

Glewlwyd 2.4 is released. Feel free to install it, test it, use it, and send feedback if you feel like it.


The full installation documentation is available in the Install documentation.


A docker image is available for tests on localhost, run the following command:

$ docker run --rm -it -p 4593:4593 babelouest/glewlwyd:latest

And open the address http://localhost:4593/ on your browser.

  • User: admin
  • Password: password

This Docker image can be used for tests or for real use by changing the configuration files. More information in the install documentation.

Getting started

The Getting started documentation will help administrators configure Glewlwyd's modules and authentication schemes.

User documentation

The user documentation will help Glewlwyd's users manage their profile and log in to Glewlwyd.

Core API

The full core REST API documentation is available in the API documentation

Plugins architecture

You can update the existing plugins or add new ones depending on your needs, check out the documentation available for each type of plugin:


Go to the Screenshots folder to get a visual idea of Glewlwyd.

Questions, problems or feature requests

You can open an issue, a pull request or send me an e-mail. Any help is much appreciated!

You can visit the IRC channel #glewlwyd on the Freenode network.

Download Details:

Author: babelouest


Source Code:

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