freebsd-dev/usr.sbin/rpc.ypupdated/ypupdated_server.c
alfred 13005eb45a Bring in a hybrid of SunSoft's transport-independent RPC (TI-RPC) and
associated changes that had to happen to make this possible as well as
bugs fixed along the way.

  Bring in required TLI library routines to support this.

  Since we don't support TLI we've essentially copied what NetBSD
  has done, adding a thin layer to emulate direct the TLI calls
  into BSD socket calls.

  This is mostly from Sun's tirpc release that was made in 1994,
  however some fixes were backported from the 1999 release (supposedly
  only made available after this porting effort was underway).

  The submitter has agreed to continue on and bring us up to the
  1999 release.

  Several key features are introduced with this update:
    Client calls are thread safe. (1999 code has server side thread
    safe)
    Updated, a more modern interface.

  Many userland updates were done to bring the code up to par with
  the recent RPC API.

  There is an update to the pthreads library, a function
  pthread_main_np() was added to emulate a function of Sun's threads
  library.

  While we're at it, bring in NetBSD's lockd, it's been far too
  long of a wait.

  New rpcbind(8) replaces portmap(8) (supporting communication over
  an authenticated Unix-domain socket, and by default only allowing
  set and unset requests over that channel). It's much more secure
  than the old portmapper.

  Umount(8), mountd(8), mount_nfs(8), nfsd(8) have also been upgraded
  to support TI-RPC and to support IPV6.

  Umount(8) is also fixed to unmount pathnames longer than 80 chars,
  which are currently truncated by the Kernel statfs structure.

Submitted by: Martin Blapp <mb@imp.ch>
Manpage review: ru
Secure RPC implemented by: wpaul
2001-03-19 12:50:13 +00:00

235 lines
6.2 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
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#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(svcreq)
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(args, svcreq)
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(args, svcreq)
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(args, svcreq)
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(args, svcreq)
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);
}