/*	$OpenBSD: get_svc_in_tkt.c,v 1.4 1997/12/22 15:02:06 art Exp $	*/
/* $KTH: get_svc_in_tkt.c,v 1.8 1997/03/23 03:53:09 joda Exp $ */

/*
 * This software may now be redistributed outside the US.
 *
 */

/* 
 *  Copyright (C) 1989 by the Massachusetts Institute of Technology
 *
 *  Export of this software from the United States of America is assumed
 *  to require a specific license from the United States Government.
 *  It is the responsibility of any person or organization contemplating
 *  export to obtain such a license before exporting.
 *
 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
 * distribute this software and its documentation for any purpose and
 * without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation, and that
 * the name of M.I.T. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 *
 */

#include "krb_locl.h"

/*
 * This file contains two routines: srvtab_to_key(), which gets
 * a server's key from a srvtab file, and krb_get_svc_in_tkt() which
 * gets an initial ticket for a server.
 */

/*
 * srvtab_to_key(): given a "srvtab" file (where the keys for the
 * service on a host are stored), return the private key of the
 * given service (user.instance@realm).
 *
 * srvtab_to_key() passes its arguments on to read_service_key(),
 * plus one additional argument, the key version number.
 * (Currently, the key version number is always 0; this value
 * is treated as a wildcard by read_service_key().)
 *
 * If the "srvtab" argument is null, KEYFILE (defined in "krb.h")
 * is passed in its place.
 *
 * It returns the return value of the read_service_key() call.
 * The service key is placed in "key".
 */

int 
srvtab_to_key(char *user, char *instance, char *realm, void *srvtab,
	      des_cblock *key)
{
    if (!srvtab)
        srvtab = KEYFILE;

    return(read_service_key(user, instance, realm, 0, (char *)srvtab,
                            (char *)key));
}

/*
 * krb_get_svc_in_tkt() passes its arguments on to krb_get_in_tkt(),
 * plus two additional arguments: a pointer to the srvtab_to_key()
 * function to be used to get the key from the key file and a NULL
 * for the decryption procedure indicating that krb_get_in_tkt should 
 * use the default method of decrypting the response from the KDC.
 *
 * It returns the return value of the krb_get_in_tkt() call.
 */

int
krb_get_svc_in_tkt(char *user, char *instance, char *realm, char *service,
		   char *sinstance, int life, char *srvtab)
{
    return(krb_get_in_tkt(user, instance, realm, service, sinstance,
                          life, srvtab_to_key, NULL, srvtab));
}