FIDO registration fails for Authentrend and TrustKey Security Keys

[swoozey]

FIDO registration of some Authentrend and TrustKey tokens fail with the fido2-net-lib library.

The Authentrend problems that we have had are:

• AT.Key.Pro USB-C Registered a fingerprint. Failed to register after touching fingerprint reader, stack trace: "Fido2VerificationException: Expected bit string"
  clicking the button instead of registering a fingerprint also caused failure
• AT.Key.Pro USB-A Failed to register: "Couldn't complete sign-in. Try again and ensure you do the follow-up action" after pressing the button (after time-out). If you touch the fingerprint reader, you get stack trace: "Challenge not equal to original challenge"
• AT.Key.Card failed to register. After touching fingerprint reader, stack trace: "Fido2VerificationException: Expected bit string"

TrustKey G310H and T110 devices fail FIDO Registration because they have a comma in their DN and fido2-net-lib does not handle commas in DNs correctly.