FIDO2WebAuthnmallit

FIDO2WebAuthnmallit is a term used in software development to describe a collection of design patterns, templates, and sample implementations that facilitate the integration of FIDO2 and WebAuthn authentication into applications.

These templates align with FIDO2 and the WebAuthn API and cover the two main ceremonies: credential creation for registration and assertion retrieval for authentication. They provide guidance on challenges, relying party configuration, origins, attestation options, and secure credential storage.

A typical set includes client-side code that uses the WebAuthn APIs (such as navigator.credentials.create and navigator.credentials.get) and server-side components that verify attestation responses, authentication assertions, and the association of credentials with user accounts.

Benefits include reduced boilerplate, adherence to security best practices, and a consistent user experience across platforms and authenticators (platform, roaming, or external keys). Limitations require proper server support and careful handling of origin validation, RP IDs, and credential lifecycle management.

Availability and scope vary, but many collections are published as open-source repositories or templates for common tech stacks (JavaScript/TypeScript, Python, Java, .NET). They serve web-based apps and can be adapted for mobile or hybrid contexts that expose WebAuthn functionality.