236 lines
6.2 KiB
C
236 lines
6.2 KiB
C
/*
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* Copyright (c) 1995, 1996
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* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Bill Paul.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* ypupdate server implementation
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*
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* Written by Bill Paul <wpaul@ctr.columbia.edu>
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* Center for Telecommunications Research
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* Columbia University, New York City
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*/
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#ifndef lint
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static const char rcsid[] =
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"$Id$";
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#endif /* not lint */
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#include <stdio.h>
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#include <rpc/rpc.h>
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#include <rpc/auth_des.h>
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#include <rpc/key_prot.h>
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#include <sys/param.h>
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#include <sys/cdefs.h>
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#include <rpcsvc/yp.h>
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#include "ypupdate_prot.h"
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#include "ypupdated_extern.h"
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#include "yp_extern.h"
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#include "ypxfr_extern.h"
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int children = 0;
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int forked = 0;
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/*
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* Try to avoid spoofing: if a client chooses to use a very large
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* window and then tries a bunch of randomly chosen encrypted timestamps,
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* there's a chance he might stumble onto a valid combination.
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* We therefore reject any RPCs with a window size larger than a preset
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* value.
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*/
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#ifndef WINDOW
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#define WINDOW (60*60)
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#endif
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static enum auth_stat yp_checkauth(svcreq)
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struct svc_req *svcreq;
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{
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struct authdes_cred *des_cred;
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switch (svcreq->rq_cred.oa_flavor) {
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case AUTH_DES:
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des_cred = (struct authdes_cred *) svcreq->rq_clntcred;
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if (des_cred->adc_fullname.window > WINDOW) {
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yp_error("warning: client-specified window size \
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was too large -- possible spoof attempt");
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return(AUTH_BADCRED);
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}
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return(AUTH_OK);
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break;
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case AUTH_UNIX:
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case AUTH_NONE:
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yp_error("warning: client didn't use DES authentication");
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return(AUTH_TOOWEAK);
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break;
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default:
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yp_error("client used unknown auth flavor");
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return(AUTH_REJECTEDCRED);
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break;
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}
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}
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unsigned int *ypu_change_1_svc(args, svcreq)
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struct ypupdate_args *args;
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struct svc_req *svcreq;
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{
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struct authdes_cred *des_cred;
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static int res;
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char *netname;
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enum auth_stat astat;
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res = 0;
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astat = yp_checkauth(svcreq);
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if (astat != AUTH_OK) {
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svcerr_auth(svcreq->rq_xprt, astat);
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return(&res);
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}
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des_cred = (struct authdes_cred *) svcreq->rq_clntcred;
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netname = des_cred->adc_fullname.name;
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res = localupdate(netname, "/etc/publickey", YPOP_CHANGE,
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args->key.yp_buf_len, args->key.yp_buf_val,
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args->datum.yp_buf_len, args->datum.yp_buf_val);
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if (res)
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return (&res);
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res = ypmap_update(netname, args->mapname, YPOP_CHANGE,
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args->key.yp_buf_len, args->key.yp_buf_val,
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args->datum.yp_buf_len, args->datum.yp_buf_val);
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return (&res);
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}
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unsigned int *ypu_insert_1_svc(args, svcreq)
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struct ypupdate_args *args;
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struct svc_req *svcreq;
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{
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struct authdes_cred *des_cred;
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static int res;
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char *netname;
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enum auth_stat astat;
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res = 0;
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astat = yp_checkauth(svcreq);
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if (astat != AUTH_OK) {
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svcerr_auth(svcreq->rq_xprt, astat);
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return(&res);
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}
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des_cred = (struct authdes_cred *) svcreq->rq_clntcred;
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netname = des_cred->adc_fullname.name;
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res = localupdate(netname, "/etc/publickey", YPOP_INSERT,
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args->key.yp_buf_len, args->key.yp_buf_val,
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args->datum.yp_buf_len, args->datum.yp_buf_val);
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if (res)
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return (&res);
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res = ypmap_update(netname, args->mapname, YPOP_INSERT,
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args->key.yp_buf_len, args->key.yp_buf_val,
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args->datum.yp_buf_len, args->datum.yp_buf_val);
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return (&res);
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}
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unsigned int *ypu_delete_1_svc(args, svcreq)
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struct ypdelete_args *args;
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struct svc_req *svcreq;
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{
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struct authdes_cred *des_cred;
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static int res;
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char *netname;
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enum auth_stat astat;
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res = 0;
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astat = yp_checkauth(svcreq);
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if (astat != AUTH_OK) {
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svcerr_auth(svcreq->rq_xprt, astat);
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return(&res);
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}
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des_cred = (struct authdes_cred *) svcreq->rq_clntcred;
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netname = des_cred->adc_fullname.name;
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res = localupdate(netname, "/etc/publickey", YPOP_DELETE,
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args->key.yp_buf_len, args->key.yp_buf_val,
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0, NULL);
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if (res)
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return (&res);
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res = ypmap_update(netname, args->mapname, YPOP_DELETE,
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args->key.yp_buf_len, args->key.yp_buf_val,
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0, NULL);
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return (&res);
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}
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unsigned int *ypu_store_1_svc(args, svcreq)
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struct ypupdate_args *args;
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struct svc_req *svcreq;
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{
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struct authdes_cred *des_cred;
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static int res;
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char *netname;
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enum auth_stat astat;
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res = 0;
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astat = yp_checkauth(svcreq);
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if (astat != AUTH_OK) {
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svcerr_auth(svcreq->rq_xprt, astat);
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return(&res);
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}
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des_cred = (struct authdes_cred *) svcreq->rq_clntcred;
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netname = des_cred->adc_fullname.name;
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res = localupdate(netname, "/etc/publickey", YPOP_STORE,
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args->key.yp_buf_len, args->key.yp_buf_val,
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args->datum.yp_buf_len, args->datum.yp_buf_val);
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if (res)
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return (&res);
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res = ypmap_update(netname, args->mapname, YPOP_STORE,
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args->key.yp_buf_len, args->key.yp_buf_val,
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args->datum.yp_buf_len, args->datum.yp_buf_val);
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return (&res);
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}
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