/* * Copyright (c) 1995, 1996 * Bill Paul . 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 * Center for Telecommunications Research * Columbia University, New York City */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #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); }