/*-
 * Copyright (c) 2009, Sun Microsystems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name of Sun Microsystems, Inc. nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * $FreeBSD: src/include/rpc/auth_kerb.h,v 1.3 2007/02/02 18:11:18 schweikh Exp $
 */
/*
 * auth_kerb.h, Protocol for Kerberos style authentication for RPC
 *
 * Copyright (C) 1986, Sun Microsystems, Inc.
 */

#ifndef	_RPC_AUTH_KERB_H
#define	_RPC_AUTH_KERB_H

#ifdef KERBEROS

#include <kerberos/krb.h>
#include <sys/socket.h>
#include <sys/t_kuser.h>
#include <netinet/in.h>
#include <rpc/svc.h>

/*
 * There are two kinds of "names": fullnames and nicknames
 */
enum authkerb_namekind {
	AKN_FULLNAME,
	AKN_NICKNAME
};
/*
 * A fullname contains the ticket and the window
 */
struct authkerb_fullname {
	KTEXT_ST ticket;
	u_long window;		/* associated window */
};

/*
 *  cooked credential stored in rq_clntcred
 */
struct authkerb_clnt_cred {
	/* start of AUTH_DAT */
	unsigned char k_flags;	/* Flags from ticket */
	char    pname[ANAME_SZ]; /* Principal's name */
	char    pinst[INST_SZ];	/* His Instance */
	char    prealm[REALM_SZ]; /* His Realm */
	unsigned long checksum;	/* Data checksum (opt) */
	C_Block session;	/* Session Key */
	int	life;		/* Life of ticket */
	unsigned long time_sec;	/* Time ticket issued */
	unsigned long address;	/* Address in ticket */
	/* KTEXT_ST reply;	Auth reply (opt) */
	/* end of AUTH_DAT */
	unsigned long expiry;	/* time the ticket is expiring */
	u_long nickname;	/* Nickname into cache */
	u_long window;		/* associated window */
};

typedef struct authkerb_clnt_cred authkerb_clnt_cred;

/*
 * A credential
 */
struct authkerb_cred {
	enum authkerb_namekind akc_namekind;
	struct authkerb_fullname akc_fullname;
	u_long akc_nickname;
};

/*
 * A kerb authentication verifier
 */
struct authkerb_verf {
	union {
		struct timeval akv_ctime;	/* clear time */
		des_block akv_xtime;		/* crypt time */
	} akv_time_u;
	u_long akv_int_u;
};

/*
 * des authentication verifier: client variety
 *
 * akv_timestamp is the current time.
 * akv_winverf is the credential window + 1.
 * Both are encrypted using the conversation key.
 */
#ifndef akv_timestamp
#define	akv_timestamp	akv_time_u.akv_ctime
#define	akv_xtimestamp	akv_time_u.akv_xtime
#define	akv_winverf	akv_int_u
#endif
/*
 * des authentication verifier: server variety
 *
 * akv_timeverf is the client's timestamp + client's window
 * akv_nickname is the server's nickname for the client.
 * akv_timeverf is encrypted using the conversation key.
 */
#ifndef akv_timeverf
#define	akv_timeverf	akv_time_u.akv_ctime
#define	akv_xtimeverf	akv_time_u.akv_xtime
#define	akv_nickname	akv_int_u
#endif

/*
 * Register the service name, instance and realm.
 */
extern int	authkerb_create(char *, char *, char *, u_int,
			struct netbuf *, int *, dev_t, int, AUTH **);
extern bool_t	xdr_authkerb_cred(XDR *, struct authkerb_cred *);
extern bool_t	xdr_authkerb_verf(XDR *, struct authkerb_verf *);
extern int	svc_kerb_reg(SVCXPRT *, char *, char *, char *);
extern enum auth_stat _svcauth_kerb(struct svc_req *, struct rpc_msg *);

#endif	/* KERBEROS */
#endif	/* !_RPC_AUTH_KERB_H */