Webauthn Framework
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This page is about an advanced feature. You can skip it if you are new with Webauthn
The mechanism for generating public key credentials, as well as requesting and generating Authentication assertions, can be extended to suit particular use cases. Each case is addressed by defining a registration extension.
Standard extensions are usually listed in the dedicated IANA Registry available at https://www.iana.org/assignments/webauthn/webauthn.xhtml
This library is ready to handle extension inputs and outputs, but no concrete implementations are provided, except for the appid extension.
It is up to you, depending on the extensions you want to support, to create the extension handlers.