/*	$OpenBSD: afskrb.c,v 1.2 1997/12/12 11:46:31 art Exp $	*/
/* $KTH: afskrb.c,v 1.8 1997/10/14 23:00:39 joda Exp $ */

/*
 * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. 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.
 * 
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the Kungliga Tekniska
 *      Högskolan and its contributors.
 * 
 * 4. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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.
 */

#include "kafs_locl.h"

struct krb_kafs_data {
    const char *realm;
};

static int
get_cred(kafs_data *data, const char *name, const char *inst, 
	 const char *realm, CREDENTIALS *c)
{
    KTEXT_ST tkt;
    int ret = krb_get_cred((char*)name, (char*)inst, (char*)realm, c);
    
    if (ret) {
	ret = krb_mk_req(&tkt, (char*)name, (char*)inst, (char*)realm, 0);
	if (ret == KSUCCESS)
	    ret = krb_get_cred((char*)name, (char*)inst, (char*)realm, c);
    }
    return ret;
}

static int
afslog_uid_int(kafs_data *data, const char *cell, uid_t uid)
{
    int ret;
    CREDENTIALS c;
    struct krb_kafs_data *d = data->data;
    char realm[REALM_SZ], *lrealm;
    
    if (cell == 0 || cell[0] == 0)
	return _kafs_afslog_all_local_cells (data, uid);

    ret = krb_get_lrealm(realm , 0);
    if(ret == KSUCCESS && (d->realm == NULL || strcmp(d->realm, realm)))
	lrealm = realm;
    else
	lrealm = NULL;

    ret = _kafs_get_cred(data, cell, d->realm, lrealm, &c);
    
    if(ret == 0)
	ret = kafs_settoken(cell, uid, &c);
    return ret;
}

static char *
get_realm(kafs_data *data, const char *host)
{
    char *r = krb_realmofhost(host);
    if(r != NULL)
	return strdup(r);
    return NULL;
}

int
krb_afslog_uid(const char *cell, const char *realm, uid_t uid)
{
    kafs_data kd;
    struct krb_kafs_data d;
    kd.afslog_uid = afslog_uid_int;
    kd.get_cred = get_cred;
    kd.get_realm = get_realm;
    kd.data = &d;
    d.realm = realm;
    return afslog_uid_int(&kd, cell, uid);
}

int
krb_afslog(const char *cell, const char *realm)
{
    return krb_afslog_uid (cell, realm, getuid());
}