229 lines
6.1 KiB
C
229 lines
6.1 KiB
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("$FreeBSD$");
|
|
|
|
#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);
|
|
}
|