[gnutls-devel] GnuTLS | OpenSSL IPv6 PSK Incompatibility (#683)

Development of GNU's TLS library gnutls-devel at lists.gnutls.org
Thu Jan 24 17:54:02 CET 2019

> What about using GNUTLS_E_UNRECOGNIZED_NAME instead of GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER (in server_name.c / _gnutls_server_name_recv_params()) ?

IMO illegal_parameter is more appropriate here according to the RFC:
   illegal_parameter:  A field in the handshake was incorrect or
      inconsistent with other fields.  _This alert is used for errors
      which conform to the formal protocol syntax but are otherwise
   unrecognized_name:  Sent by servers when no server exists identified
      by the name provided by the client via the "server_name" extension
      (see [RFC6066]).
That would allow clients to distinguish whether the error is in protocol level or configuration level.

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