VMS Help TCPIP Services, Programming Interfaces, RPC XDR Routines, xdr_opaque_auth  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Serializes and deserializes ONC RPC authentication information
    message.
    Format
      #include  <tcpip$rpcxdr.h>
      bool_t  xdr_opaque_auth(XDR *xdrs, struct opaque_auth *authp);

1 - Arguments

 xdrs
    A pointer to an XDR stream handle created by one of the XDR
    stream handle creation routines.
 authp
    A pointer to an opaque_auth structure describing authentication
    information. The pointer should reference data created by the
    authnone_create, authunix_create, or authunix_create_default
    routine.

2 - Description

    Translates ONC RPC authentication information messages. This
    routine is useful for users who want to generate messages without
    using the ONC RPC package.

3 - Return Values

    TRUE               Indicates success.
    FALSE              Indicates failure.