94 typedef struct AUTH AUTH;  typedef
95 struct AUTH {  struct
100     void (*ah_nextverf) (AUTH *);  argument
101     int  (*ah_marshal) (AUTH *, XDR *);		/* nextverf & serialize */
102     int  (*ah_validate) (AUTH *, struct opaque_auth *);
104     int  (*ah_refresh) (AUTH *);		/* refresh credentials */
105     void (*ah_destroy) (AUTH *); 	    	/* destroy this structure */
161 extern AUTH *authunix_create (char *__machname, __uid_t __uid, __gid_t __gid,
163 extern AUTH *authunix_create_default (void);
164 extern AUTH *authnone_create (void) __THROW;
165 extern AUTH *authdes_create (const char *__servername, u_int __window,
168 extern AUTH *authdes_pk_create (const char *, netobj *, u_int,