Commits on Feb 14, 2023

1. Fix usage check …

   This patch fixes the usage check in the device detection:
   
   - Instead of usage 0x21, we now check for usage 0x01 as mandated by the
     FIDO2 spec, § 11.2.8.1 [0].
   - Instead of using the last usage value in the USB descriptor, which
     belongs to an endpoint and not to the device, we now use the first
     (non-zero) value.
   
   The descriptor parsing could still be improved, but this should fix
   compatibility with all compliant FIDO2 devices.
   
   This patch also adds a simple list example for listing the detected
   devices.
   
   [0] https://fidoalliance.org/specs/fido-v2.1-ps-20210615/fido-client-to-authenticator-protocol-v2.1-ps-20210615.html#usb-discovery

   

   robin-nitrokey committed Feb 14, 2023
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