Webautn Demo

This repository contains a demo of using Webauthn for authentication, which allows you to use:

• Hardware keys, such as YubiKey
• Passkeys, which are cryptographic keys stored in your phone and synchronized to cloud

This demo comes along with my blog post.

Demo modes

• In the client-side mode, we just do everything in browser, to get a feel of browser API
• In the server mode, we use server authentication, but the credentials are created by the browser and remain local to the brower
• In the server cross-platform mode, we try to use true cross-platform authenticators.

Decoding and verification

For illustration purposes, I wrote a few functions that decode the protocol messages into more readable form, and show some cryptographic verification. They are purely for illustration, please don't use them in any production code.

References

• Webauthn Standard
• YubiKey WebAuthn Developer Guide
• iOS Passkeys User Documentation
• Google Passkeys Developer Documentation