anchor.diff:              select_client_cert_key_pair(Session0, Rest, ServerSignAlgsCert, ServerSignAlgsCert, ClientSignAlgs,
                                           CertDbHandle, CertDbRef, CertAuths)
       end.
  -
  
positive.code:                            maps:get(signature_algs, Extensions, undefined)),
          ClientSignAlgsCert = get_signature_scheme_list(
                                 maps:get(signature_algs_cert, Extensions, undefined)),
          CertAuths = get_certificate_authorites(maps:get(certificate_authorities, Extensions, undefined)),
          CookieExt = maps:get(cookie, Extensions, undefined),
          Cookie = get_cookie(CookieExt),
  
  
negative.code:                        maps:get(signature_algs, Extensions, undefined)),
      ServerSignAlgsCert = get_signature_scheme_list(
                             maps:get(signature_algs_cert, 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,
  