/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#ifndef _RPC_AUTH_DES_H
#define _RPC_AUTH_DES_H	1

#include <sys/cdefs.h>
#include <rpc/auth.h>

__BEGIN_DECLS

/* There are two kinds of "names": fullnames and nicknames */
enum authdes_namekind
  {
    ADN_FULLNAME,
    ADN_NICKNAME
  };

/* A fullname contains the network name of the client,
   a conversation key and the window */
struct authdes_fullname
  {
    char *name;		/* network name of client, up to MAXNETNAMELEN */
    des_block key;	/* conversation key */
    u_long window;	/* associated window */
  };

/* A credential */
struct authdes_cred
  {
    enum authdes_namekind adc_namekind;
    struct authdes_fullname adc_fullname;
    u_long adc_nickname;
  };

/* A des authentication verifier */
struct authdes_verf
  {
    union
      {
	struct timeval adv_ctime;	/* clear time */
	des_block adv_xtime;		/* crypt time */
      }
    adv_time_u;
    u_long adv_int_u;
  };

/* des authentication verifier: client variety

   adv_timestamp is the current time.
   adv_winverf is the credential window + 1.
   Both are encrypted using the conversation key. */
#define adv_timestamp  adv_time_u.adv_ctime
#define adv_xtimestamp adv_time_u.adv_xtime
#define adv_winverf    adv_int_u

/* des authentication verifier: server variety

   adv_timeverf is the client's timestamp + client's window
   adv_nickname is the server's nickname for the client.
   adv_timeverf is encrypted using the conversation key. */
#define adv_timeverf   adv_time_u.adv_ctime
#define adv_xtimeverf  adv_time_u.adv_xtime
#define adv_nickname   adv_int_u

/* Map a des credential into a unix cred. */
extern int authdes_getucred __P ((__const struct authdes_cred * __adc,
				  uid_t * __uid, gid_t * __gid,
				  short *__grouplen, gid_t * __groups));

/* Get the public key for NAME and place it in KEY.  NAME can only be
   up to MAXNETNAMELEN bytes long and the destination buffer KEY should
   have HEXKEYBATES + 1 bytes long to fit all characters from the key.  */
extern int getpublickey __P ((__const char *__name, char *__key));

/* Get the secret key for NAME and place it in KEY.  PASSWD is used to
   decrypt the encrypted key stored in the database.  NAME can only be
   up to MAXNETNAMELEN bytes long and the destination buffer KEY
   should have HEXKEYBATES + 1 bytes long to fit all characters from
   the key.  */
extern int getsecretkey __P ((__const char *__name, char *__key,
			      __const char *__passwd));

extern int rtime __P ((struct sockaddr_in *__addrp,  struct timeval *__timep,
		       struct timeval *__timeout));

__END_DECLS


#endif /* rpc/auth_des.h */