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ec01fc4f14
for root on ypmaster. Fix ypclnt_havepasswdd() to work for AF_LOCAL connections. Reviewed by: des
317 lines
8.9 KiB
C
317 lines
8.9 KiB
C
/*-
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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by ThinkSec AS and
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* NAI Labs, the Security Research Division of Network Associates, Inc.
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* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
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* DARPA CHATS research program.
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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. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 THE AUTHOR 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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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <err.h>
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#include <errno.h>
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#include <netconfig.h>
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#include <netdb.h>
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#include <pwd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <rpcsvc/ypclnt.h>
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#include <rpcsvc/yppasswd.h>
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#include "ypclnt.h"
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#include "yppasswd_private.h"
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static int yppasswd_remote(ypclnt_t *, const struct passwd *, const char *);
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static int yppasswd_local(ypclnt_t *, const struct passwd *);
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/*
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* Determines the availability of rpc.yppasswdd. Returns -1 for not
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* available (or unable to determine), 0 for available, 1 for available in
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* master mode.
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*/
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int
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ypclnt_havepasswdd(ypclnt_t *ypclnt)
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{
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struct netconfig *nc = NULL;
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void *localhandle = 0;
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CLIENT *clnt = NULL;
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int ret;
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/* check if rpc.yppasswdd is running */
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if (getrpcport(ypclnt->server, YPPASSWDPROG,
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YPPASSWDPROC_UPDATE, IPPROTO_UDP) == 0) {
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ypclnt_error(ypclnt, __func__, "no rpc.yppasswdd on server");
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return (-1);
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}
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/* if we're not root, use remote method */
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if (getuid() != 0)
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return (0);
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/* try to connect to rpc.yppasswdd */
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localhandle = setnetconfig();
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while ((nc = getnetconfig(localhandle)) != NULL) {
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if (nc->nc_protofmly != NULL &&
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strcmp(nc->nc_protofmly, NC_LOOPBACK) == 0)
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break;
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}
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if (nc == NULL) {
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ypclnt_error(ypclnt, __func__,
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"getnetconfig: %s", nc_sperror());
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ret = 0;
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goto done;
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}
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if ((clnt = clnt_tp_create(NULL, MASTER_YPPASSWDPROG,
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MASTER_YPPASSWDVERS, nc)) == NULL) {
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ypclnt_error(ypclnt, __func__,
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"failed to connect to rpc.yppasswdd: %s",
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clnt_spcreateerror(ypclnt->server));
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ret = 0;
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goto done;
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} else
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ret = 1;
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done:
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if (clnt != NULL) {
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clnt_destroy(clnt);
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}
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endnetconfig(localhandle);
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return (ret);
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}
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/*
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* Updates the NIS user information for the specified user.
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*/
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int
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ypclnt_passwd(ypclnt_t *ypclnt, const struct passwd *pwd, const char *passwd)
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{
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switch (ypclnt_havepasswdd(ypclnt)) {
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case 0:
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YPCLNT_DEBUG("using remote update method");
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return (yppasswd_remote(ypclnt, pwd, passwd));
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case 1:
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YPCLNT_DEBUG("using local update method");
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return (yppasswd_local(ypclnt, pwd));
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default:
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YPCLNT_DEBUG("no rpc.yppasswdd");
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return (-1);
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}
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}
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/*
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* yppasswd_remote and yppasswd_local are quite similar but still
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* sufficiently different that merging them into one makes the code
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* significantly less readable, IMHO, so we keep them separate.
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*/
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static int
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yppasswd_local(ypclnt_t *ypclnt, const struct passwd *pwd)
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{
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struct master_yppasswd yppwd;
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struct rpc_err rpcerr;
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struct netconfig *nc = NULL;
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void *localhandle = 0;
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CLIENT *clnt = NULL;
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int ret, *result;
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/* fill the master_yppasswd structure */
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memset(&yppwd, 0, sizeof yppwd);
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yppwd.newpw.pw_uid = pwd->pw_uid;
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yppwd.newpw.pw_gid = pwd->pw_gid;
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yppwd.newpw.pw_change = pwd->pw_change;
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yppwd.newpw.pw_expire = pwd->pw_expire;
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yppwd.newpw.pw_fields = pwd->pw_fields;
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yppwd.oldpass = strdup("");
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yppwd.domain = strdup(ypclnt->domain);
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if ((yppwd.newpw.pw_name = strdup(pwd->pw_name)) == NULL ||
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(yppwd.newpw.pw_passwd = strdup(pwd->pw_passwd)) == NULL ||
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(yppwd.newpw.pw_class = strdup(pwd->pw_class)) == NULL ||
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(yppwd.newpw.pw_gecos = strdup(pwd->pw_gecos)) == NULL ||
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(yppwd.newpw.pw_dir = strdup(pwd->pw_dir)) == NULL ||
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(yppwd.newpw.pw_shell = strdup(pwd->pw_shell)) == NULL) {
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ypclnt_error(ypclnt, __func__, strerror(errno));
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ret = -1;
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goto done;
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}
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/* connect to rpc.yppasswdd */
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localhandle = setnetconfig();
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while ((nc = getnetconfig(localhandle)) != NULL) {
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if (nc->nc_protofmly != NULL &&
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strcmp(nc->nc_protofmly, NC_LOOPBACK) == 0)
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break;
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}
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if (nc == NULL) {
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ypclnt_error(ypclnt, __func__,
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"getnetconfig: %s", nc_sperror());
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ret = -1;
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goto done;
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}
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if ((clnt = clnt_tp_create(NULL, MASTER_YPPASSWDPROG,
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MASTER_YPPASSWDVERS, nc)) == NULL) {
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ypclnt_error(ypclnt, __func__,
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"failed to connect to rpc.yppasswdd: %s",
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clnt_spcreateerror(ypclnt->server));
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ret = -1;
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goto done;
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}
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clnt->cl_auth = authunix_create_default();
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/* request the update */
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result = yppasswdproc_update_master_1(&yppwd, clnt);
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/* check for RPC errors */
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clnt_geterr(clnt, &rpcerr);
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if (rpcerr.re_status != RPC_SUCCESS) {
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ypclnt_error(ypclnt, __func__,
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"NIS password update failed: %s",
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clnt_sperror(clnt, ypclnt->server));
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ret = -1;
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goto done;
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}
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/* check the result of the update */
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if (result == NULL || *result != 0) {
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ypclnt_error(ypclnt, __func__,
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"NIS password update failed");
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/* XXX how do we get more details? */
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ret = -1;
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goto done;
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}
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ypclnt_error(ypclnt, NULL, NULL);
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ret = 0;
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done:
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if (clnt != NULL) {
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auth_destroy(clnt->cl_auth);
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clnt_destroy(clnt);
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}
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endnetconfig(localhandle);
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free(yppwd.newpw.pw_name);
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if (yppwd.newpw.pw_passwd != NULL) {
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memset(yppwd.newpw.pw_passwd, 0, strlen(yppwd.newpw.pw_passwd));
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free(yppwd.newpw.pw_passwd);
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}
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free(yppwd.newpw.pw_class);
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free(yppwd.newpw.pw_gecos);
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free(yppwd.newpw.pw_dir);
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free(yppwd.newpw.pw_shell);
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if (yppwd.oldpass != NULL) {
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memset(yppwd.oldpass, 0, strlen(yppwd.oldpass));
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free(yppwd.oldpass);
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}
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return (ret);
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}
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static int
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yppasswd_remote(ypclnt_t *ypclnt, const struct passwd *pwd, const char *passwd)
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{
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struct yppasswd yppwd;
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struct rpc_err rpcerr;
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CLIENT *clnt = NULL;
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int ret, *result;
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/* fill the yppasswd structure */
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memset(&yppwd, 0, sizeof yppwd);
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yppwd.newpw.pw_uid = pwd->pw_uid;
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yppwd.newpw.pw_gid = pwd->pw_gid;
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if ((yppwd.newpw.pw_name = strdup(pwd->pw_name)) == NULL ||
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(yppwd.newpw.pw_passwd = strdup(pwd->pw_passwd)) == NULL ||
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(yppwd.newpw.pw_gecos = strdup(pwd->pw_gecos)) == NULL ||
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(yppwd.newpw.pw_dir = strdup(pwd->pw_dir)) == NULL ||
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(yppwd.newpw.pw_shell = strdup(pwd->pw_shell)) == NULL ||
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(yppwd.oldpass = strdup(passwd ? passwd : "")) == NULL) {
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ypclnt_error(ypclnt, __func__, strerror(errno));
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ret = -1;
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goto done;
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}
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/* connect to rpc.yppasswdd */
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clnt = clnt_create(ypclnt->server, YPPASSWDPROG, YPPASSWDVERS, "udp");
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if (clnt == NULL) {
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ypclnt_error(ypclnt, __func__,
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"failed to connect to rpc.yppasswdd: %s",
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clnt_spcreateerror(ypclnt->server));
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ret = -1;
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goto done;
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}
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clnt->cl_auth = authunix_create_default();
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/* request the update */
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result = yppasswdproc_update_1(&yppwd, clnt);
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/* check for RPC errors */
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clnt_geterr(clnt, &rpcerr);
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if (rpcerr.re_status != RPC_SUCCESS) {
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ypclnt_error(ypclnt, __func__,
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"NIS password update failed: %s",
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clnt_sperror(clnt, ypclnt->server));
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ret = -1;
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goto done;
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}
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/* check the result of the update */
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if (result == NULL || *result != 0) {
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ypclnt_error(ypclnt, __func__,
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"NIS password update failed");
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/* XXX how do we get more details? */
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ret = -1;
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goto done;
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}
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ypclnt_error(ypclnt, NULL, NULL);
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ret = 0;
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done:
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if (clnt != NULL) {
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auth_destroy(clnt->cl_auth);
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clnt_destroy(clnt);
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}
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free(yppwd.newpw.pw_name);
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if (yppwd.newpw.pw_passwd != NULL) {
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memset(yppwd.newpw.pw_passwd, 0, strlen(yppwd.newpw.pw_passwd));
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free(yppwd.newpw.pw_passwd);
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}
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free(yppwd.newpw.pw_gecos);
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free(yppwd.newpw.pw_dir);
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free(yppwd.newpw.pw_shell);
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if (yppwd.oldpass != NULL) {
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memset(yppwd.oldpass, 0, strlen(yppwd.oldpass));
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free(yppwd.oldpass);
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}
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return (ret);
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}
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