OpenBSD-4.6/usr.bin/chpass/pw_yp.c
/* $OpenBSD: pw_yp.c,v 1.22 2009/02/15 21:43:40 deraadt Exp $ */
/* $NetBSD: pw_yp.c,v 1.5 1995/03/26 04:55:33 glass Exp $ */
/*
* Copyright (c) 1988 The Regents of the University of California.
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 THE REGENTS 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.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)pw_yp.c 1.0 2/2/93";
#else
static char rcsid[] = "$OpenBSD: pw_yp.c,v 1.22 2009/02/15 21:43:40 deraadt Exp $";
#endif
#endif /* not lint */
#ifdef YP
#include <stdio.h>
#include <string.h>
#include <netdb.h>
#include <time.h>
#include <pwd.h>
#include <err.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <rpc/rpc.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#define passwd yp_passwd_rec
#include <rpcsvc/yppasswd.h>
#undef passwd
#include "chpass.h"
extern char *__progname;
static char *domain;
int
pw_yp(struct passwd *pw, uid_t uid)
{
char uidbuf[20], gidbuf[20], *master, *p;
int r, rpcport, status, alen;
struct yppasswd yppasswd;
struct timeval tv;
CLIENT *client;
/*
* Get local domain
*/
if (!domain && (r = yp_get_default_domain(&domain))) {
fprintf(stderr, "%s: can't get local YP domain. Reason: %s\n",
__progname, yperr_string(r));
return(0);
}
/*
* Find the host for the passwd map; it should be running
* the daemon.
*/
if ((r = yp_master(domain, "passwd.byname", &master)) != 0) {
fprintf(stderr,
"%s: can't find the master YP server. Reason: %s\n",
__progname, yperr_string(r));
return(0);
}
/*
* Ask the portmapper for the port of the daemon.
*/
if ((rpcport = getrpcport(master, YPPASSWDPROG, YPPASSWDPROC_UPDATE,
IPPROTO_UDP)) == 0) {
fprintf(stderr,
"%s: master YP server not running yppasswd daemon.\n",
__progname);
fprintf(stderr, "\tCan't change password.\n");
return(0);
}
/*
* Be sure the port is privileged
*/
if (rpcport >= IPPORT_RESERVED) {
(void)fprintf(stderr,
"%s: yppasswd daemon running on an invalid port.\n",
__progname);
return(0);
}
/* prompt for old password */
bzero(&yppasswd, sizeof yppasswd);
yppasswd.oldpass = "none";
yppasswd.oldpass = getpass("Old password:");
if (!yppasswd.oldpass) {
(void)fprintf(stderr, "Cancelled.\n");
return(0);
}
for (alen = 0, p = pw->pw_gecos; *p; p++)
if (*p == '&')
alen = alen + strlen(pw->pw_name) - 1;
(void)snprintf(uidbuf, sizeof uidbuf, "%u", pw->pw_uid);
(void)snprintf(gidbuf, sizeof gidbuf, "%u", pw->pw_gid);
if (strlen(pw->pw_name) + 1 + strlen(pw->pw_passwd) + 1 +
strlen(uidbuf) + 1 + strlen(gidbuf) + 1 +
strlen(pw->pw_gecos) + alen + 1 + strlen(pw->pw_dir) + 1 +
strlen(pw->pw_shell) >= 1023) {
warnx("entries too long");
return (0);
}
/* tell rpc.yppasswdd */
yppasswd.newpw.pw_name = pw->pw_name;
yppasswd.newpw.pw_passwd= pw->pw_passwd;
yppasswd.newpw.pw_uid = pw->pw_uid;
yppasswd.newpw.pw_gid = pw->pw_gid;
yppasswd.newpw.pw_gecos = pw->pw_gecos;
yppasswd.newpw.pw_dir = pw->pw_dir;
yppasswd.newpw.pw_shell = pw->pw_shell;
client = clnt_create(master, YPPASSWDPROG, YPPASSWDVERS, "udp");
if (client==NULL) {
fprintf(stderr, "can't contact yppasswdd on %s: Reason: %s\n",
master, yperr_string(YPERR_YPBIND));
return(1);
}
client->cl_auth = authunix_create_default();
tv.tv_sec = 5;
tv.tv_usec = 0;
r = clnt_call(client, YPPASSWDPROC_UPDATE,
xdr_yppasswd, &yppasswd, xdr_int, &status, tv);
if (r) {
fprintf(stderr, "%s: rpc to yppasswdd failed. %d\n",
__progname, r);
clnt_destroy(client);
return(1);
} else if (status) {
printf("Couldn't change YP password information.\n");
clnt_destroy(client);
return(1);
}
printf("The YP password information has been changed on %s, the master YP passwd server.\n", master);
clnt_destroy(client);
return(0);
}
static char *
pwskip(char *p)
{
while (*p && *p != ':' && *p != '\n')
++p;
if (*p)
*p++ = 0;
return (p);
}
static struct passwd *
interpret(struct passwd *pwent, char *line, const int secure)
{
char *p = line;
pwent->pw_passwd = "*";
pwent->pw_uid = 0;
pwent->pw_gid = 0;
pwent->pw_gecos = "";
pwent->pw_dir = "";
pwent->pw_shell = "";
pwent->pw_change = 0;
pwent->pw_expire = 0;
pwent->pw_class = "";
/* line without colon separators is no good, so ignore it */
if (!strchr(p,':'))
return(NULL);
pwent->pw_name = p;
p = pwskip(p);
pwent->pw_passwd = p;
p = pwskip(p);
pwent->pw_uid = (uid_t)strtoul(p, NULL, 10);
p = pwskip(p);
pwent->pw_gid = (gid_t)strtoul(p, NULL, 10);
p = pwskip(p);
if (secure == 1) {
pwent->pw_class = p;
p = pwskip(p);
pwent->pw_change = (time_t)strtoul(p, NULL, 10);
p = pwskip(p);
pwent->pw_expire = (time_t)strtoul(p, NULL, 10);
p = pwskip(p);
}
pwent->pw_gecos = p;
p = pwskip(p);
pwent->pw_dir = p;
p = pwskip(p);
pwent->pw_shell = p;
while (*p && *p != '\n')
p++;
*p = '\0';
return (pwent);
}
static char *__yplin;
struct passwd *
ypgetpwnam(char *nam)
{
static struct passwd pwent;
int reason, vallen, secure = 0;
char *val;
/*
* Get local domain
*/
if (!domain && (reason = yp_get_default_domain(&domain))) {
fprintf(stderr, "%s: can't get local YP domain. Reason: %s\n",
__progname, yperr_string(reason));
exit(1);
}
if (!yp_match(domain, "master.passwd.byname", nam, strlen(nam),
&val, &vallen))
secure = 1;
else if (yp_match(domain, "passwd.byname", nam, strlen(nam),
&val, &vallen))
return (NULL);
val[vallen] = '\0';
if (__yplin)
free(__yplin);
if (!(__yplin = malloc(vallen + 1)))
err(1, NULL);
strlcpy(__yplin, val, vallen + 1);
free(val);
return(interpret(&pwent, __yplin, secure));
}
struct passwd *
ypgetpwuid(uid_t uid)
{
static struct passwd pwent;
int reason, vallen, secure = 0;
char namebuf[16], *val;
if (!domain && (reason = yp_get_default_domain(&domain))) {
fprintf(stderr, "%s: can't get local YP domain. Reason: %s\n",
__progname, yperr_string(reason));
exit(1);
}
snprintf(namebuf, sizeof namebuf, "%u", (u_int)uid);
if (!yp_match(domain, "master.passwd.byuid", namebuf, strlen(namebuf),
&val, &vallen))
secure = 1;
else if (yp_match(domain, "passwd.byuid", namebuf, strlen(namebuf),
&val, &vallen))
return (NULL);
val[vallen] = '\0';
if (__yplin)
free(__yplin);
if (!(__yplin = malloc(vallen + 1)))
err(1, NULL);
strlcpy(__yplin, val, vallen + 1);
free(val);
return(interpret(&pwent, __yplin, secure));
}
#endif /* YP */