anchor.diff:                         maps:get(signature_algs, Extensions, undefined)),
       ServerSignAlgsCert = get_signature_scheme_list(
                              maps:get(signature_algs_cert, Extensions, undefined)),
  -    CertAuths = get_certificate_authorites(maps:get(certificate_authorities, Extensions, undefined)),
  +    CertAuths = get_certificate_authorities(maps:get(certificate_authorities, Extensions, undefined)),
   
       CertKeyPairs = ssl_certificate:available_cert_key_pairs(CertKeyAlts, Version),
       Session = select_client_cert_key_pair(Session0, CertKeyPairs,
  
positive.code:             select_client_cert_key_pair(Session0, Rest, ServerSignAlgsCert, ServerSignAlgsCert, ClientSignAlgs,
                                          CertDbHandle, CertDbRef, CertAuths)
      end.
  
  
negative.code:     lists:filter(fun (E) -> is_atom(E) andalso E =/= unassigned end,
                   ClientSignatureSchemes).
  
  get_certificate_authorities(#certificate_authorities{authorities = Auths}) ->
      Auths;
  get_certificate_authorities(undefined) ->
      [].
  
  get_supported_groups(undefined = Groups) ->
  