FreeBSD-5.3/usr.sbin/rpc.ypupdated/ypupdated_server.c
/*
* Copyright (c) 1995, 1996
* Bill Paul <wpaul@ctr.columbia.edu>. 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 Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul 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.
*
* ypupdate server implementation
*
* Written by Bill Paul <wpaul@ctr.columbia.edu>
* Center for Telecommunications Research
* Columbia University, New York City
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.sbin/rpc.ypupdated/ypupdated_server.c,v 1.7 2003/05/03 21:06:40 obrien Exp $");
#include <stdio.h>
#include <rpc/rpc.h>
#include <rpc/key_prot.h>
#include <sys/param.h>
#include <sys/cdefs.h>
#include <rpcsvc/yp.h>
#include "ypupdate_prot.h"
#include "ypupdated_extern.h"
#include "yp_extern.h"
#include "ypxfr_extern.h"
int children = 0;
int forked = 0;
/*
* Try to avoid spoofing: if a client chooses to use a very large
* window and then tries a bunch of randomly chosen encrypted timestamps,
* there's a chance he might stumble onto a valid combination.
* We therefore reject any RPCs with a window size larger than a preset
* value.
*/
#ifndef WINDOW
#define WINDOW (60*60)
#endif
static enum auth_stat
yp_checkauth(struct svc_req *svcreq)
{
struct authdes_cred *des_cred;
switch (svcreq->rq_cred.oa_flavor) {
case AUTH_DES:
des_cred = (struct authdes_cred *) svcreq->rq_clntcred;
if (des_cred->adc_fullname.window > WINDOW) {
yp_error("warning: client-specified window size \
was too large -- possible spoof attempt");
return(AUTH_BADCRED);
}
return(AUTH_OK);
break;
case AUTH_UNIX:
case AUTH_NONE:
yp_error("warning: client didn't use DES authentication");
return(AUTH_TOOWEAK);
break;
default:
yp_error("client used unknown auth flavor");
return(AUTH_REJECTEDCRED);
break;
}
}
unsigned int *
ypu_change_1_svc(struct ypupdate_args *args, struct svc_req *svcreq)
{
struct authdes_cred *des_cred;
static int res;
char *netname;
enum auth_stat astat;
res = 0;
astat = yp_checkauth(svcreq);
if (astat != AUTH_OK) {
svcerr_auth(svcreq->rq_xprt, astat);
return(&res);
}
des_cred = (struct authdes_cred *) svcreq->rq_clntcred;
netname = des_cred->adc_fullname.name;
res = localupdate(netname, "/etc/publickey", YPOP_CHANGE,
args->key.yp_buf_len, args->key.yp_buf_val,
args->datum.yp_buf_len, args->datum.yp_buf_val);
if (res)
return (&res);
res = ypmap_update(netname, args->mapname, YPOP_CHANGE,
args->key.yp_buf_len, args->key.yp_buf_val,
args->datum.yp_buf_len, args->datum.yp_buf_val);
return (&res);
}
unsigned int *
ypu_insert_1_svc(struct ypupdate_args *args, struct svc_req *svcreq)
{
struct authdes_cred *des_cred;
static int res;
char *netname;
enum auth_stat astat;
res = 0;
astat = yp_checkauth(svcreq);
if (astat != AUTH_OK) {
svcerr_auth(svcreq->rq_xprt, astat);
return(&res);
}
des_cred = (struct authdes_cred *) svcreq->rq_clntcred;
netname = des_cred->adc_fullname.name;
res = localupdate(netname, "/etc/publickey", YPOP_INSERT,
args->key.yp_buf_len, args->key.yp_buf_val,
args->datum.yp_buf_len, args->datum.yp_buf_val);
if (res)
return (&res);
res = ypmap_update(netname, args->mapname, YPOP_INSERT,
args->key.yp_buf_len, args->key.yp_buf_val,
args->datum.yp_buf_len, args->datum.yp_buf_val);
return (&res);
}
unsigned int *
ypu_delete_1_svc(struct ypdelete_args *args, struct svc_req *svcreq)
{
struct authdes_cred *des_cred;
static int res;
char *netname;
enum auth_stat astat;
res = 0;
astat = yp_checkauth(svcreq);
if (astat != AUTH_OK) {
svcerr_auth(svcreq->rq_xprt, astat);
return(&res);
}
des_cred = (struct authdes_cred *) svcreq->rq_clntcred;
netname = des_cred->adc_fullname.name;
res = localupdate(netname, "/etc/publickey", YPOP_DELETE,
args->key.yp_buf_len, args->key.yp_buf_val,
0, NULL);
if (res)
return (&res);
res = ypmap_update(netname, args->mapname, YPOP_DELETE,
args->key.yp_buf_len, args->key.yp_buf_val,
0, NULL);
return (&res);
}
unsigned int *
ypu_store_1_svc(struct ypupdate_args *args, struct svc_req *svcreq)
{
struct authdes_cred *des_cred;
static int res;
char *netname;
enum auth_stat astat;
res = 0;
astat = yp_checkauth(svcreq);
if (astat != AUTH_OK) {
svcerr_auth(svcreq->rq_xprt, astat);
return(&res);
}
des_cred = (struct authdes_cred *) svcreq->rq_clntcred;
netname = des_cred->adc_fullname.name;
res = localupdate(netname, "/etc/publickey", YPOP_STORE,
args->key.yp_buf_len, args->key.yp_buf_val,
args->datum.yp_buf_len, args->datum.yp_buf_val);
if (res)
return (&res);
res = ypmap_update(netname, args->mapname, YPOP_STORE,
args->key.yp_buf_len, args->key.yp_buf_val,
args->datum.yp_buf_len, args->datum.yp_buf_val);
return (&res);
}