diff options
| -rw-r--r-- | chpass/Makefile | 16 | ||||
| -rw-r--r-- | chpass/chpass.1 | 78 | ||||
| -rw-r--r-- | chpass/chpass.c | 32 | ||||
| -rw-r--r-- | chpass/edit.c | 10 | ||||
| -rw-r--r-- | chpass/pw_copy.c | 8 | ||||
| -rw-r--r-- | chpass/pw_yp.c | 241 | ||||
| -rw-r--r-- | chpass/pw_yp.h | 45 |
7 files changed, 421 insertions, 9 deletions
diff --git a/chpass/Makefile b/chpass/Makefile index 7b76f90..e0849bc 100644 --- a/chpass/Makefile +++ b/chpass/Makefile @@ -6,14 +6,20 @@ BINOWN= root BINMODE=4555 .PATH: ${.CURDIR}/../../usr.sbin/pwd_mkdb ${.CURDIR}/../../usr.sbin/vipw CFLAGS+=-I${.CURDIR}/../../usr.sbin/pwd_mkdb -I${.CURDIR}/../../usr.sbin/vipw -LINKS= ${BINDIR}/chpass ${BINDIR}/chfn ${BINDIR}/chpass ${BINDIR}/chsh +LINKS= ${DESTDIR}${BINDIR}/chpass ${DESTDIR}${BINDIR}/chfn +LINKS+= ${DESTDIR}${BINDIR}/chpass ${DESTDIR}${BINDIR}/chsh +LINKS+= ${DESTDIR}${BINDIR}/chpass ${DESTDIR}${BINDIR}/ypchpass +LINKS+= ${DESTDIR}${BINDIR}/chpass ${DESTDIR}${BINDIR}/ypchfn +LINKS+= ${DESTDIR}${BINDIR}/chpass ${DESTDIR}${BINDIR}/ypchsh MLINKS= chpass.1 chfn.1 chpass.1 chsh.1 - +COPTS+=-DYP +SRCS+= pw_yp.c +LDADD+=-lrpcsvc -lcrypt beforeinstall: - [ ! -e ${DESTDIR}/usr/bin/chpass ] || \ - chflags noschg ${DESTDIR}/usr/bin/chpass + [ ! -e ${DESTDIR}${BINDIR}/chpass ] || \ + chflags noschg ${DESTDIR}${BINDIR}/chpass afterinstall: - chflags schg ${DESTDIR}/usr/bin/chpass + chflags schg ${DESTDIR}${BINDIR}/chpass .include <bsd.prog.mk> diff --git a/chpass/chpass.1 b/chpass/chpass.1 index 534f063..6186c7b 100644 --- a/chpass/chpass.1 +++ b/chpass/chpass.1 @@ -35,7 +35,7 @@ .Dt CHPASS 1 .Os .Sh NAME -.Nm chpass +.Nm chpass, chfn, chsh, ypchpass, ypchfn, ypchsh .Nd add or change user database information .Sh SYNOPSIS chpass @@ -205,6 +205,72 @@ When the editor terminates, the information is re-read and used to update the user database itself. Only the user, or the super-user, may edit the information associated with the user. +.Sh NIS INTERACTION +.Nm Chpass +can also be used in conjunction with NIS, however some restrictions +apply. +Currently, +.Nm chpass +can only make changes to the NIS passwd maps through +.Xr yppasswdd 8 , +which only permits changes to a user's password, shell and gecos +fields. It can not be used to change other user information or to +add new records to the NIS passwd maps. (Doing that would require +something such as ypupdated, which is not yet supported.) +Furthermore, +.Xr yppasswdd 8 +requires password authentication before it will make any +changes, even if it receives a request from the super-user. +.Pp +As a result, the following restrictions apply when +.Nm chpass +is used with NIS: +.Bl -enum -offset indent +.It +.Pa Only the shell and gecos information may be changed. +All other +fields are restricted, even when +.Nm chpass +is invoked by the super-user, because the +.Xr yppasswdd 8 +daemon has no support for updating them. While support for +changing other fields could be added, this would lead to +compatibility problems with other NIS-capable systems. +Even though the super-user may supply data for other fields +while editing an entry, the extra information (other than the +password -- see below) will be silently discarded. +.It +.Pa Password authentication is required. +.Nm Chpass +will prompt for the user's NIS password before effecting +any changes. If the password is invalid, all changes will be +discarded. +.It +.Pa Adding new records to the local +.Pa password database is discouraged. +.Nm Chpass +will allow the administrator to add new records to the +local password database while NIS is enabled, but this can lead to +some confusion since the new records are appended to the end of +the master password file, usually after the special NIS '+' entries. +The administrator should use +.Xr vipw 8 +to modify the local password +file when NIS is running. +.It +.Pa Password changes are not permitted. +Users should use +.Xr passwd 1 +or +.Xr yppasswd 1 +to change their NIS passwords. The super-user is allowed to specify +a new password (even though the ``Password:'' field does not show +up in the editor template, the super-user may add it back by hand), +but even the super-user must supply the user's original password +otherwise +.Xr yppasswdd 8 +will refuse to update the NIS maps. +.El .Sh FILES .Bl -tag -width /etc/master.passwd -compact .It Pa /etc/master.passwd @@ -230,6 +296,16 @@ and .%A Ken Thompson .%T "UNIX Password security" .Re +.Sh NOTES +The +.Xr chfn 1 , +.Xr chsh 1 , +.Xr ypchpass 1 , +.Xr ypchfn 1 +and +.Xr upchsh 1 +commands are really only links to +.Nm chpass . .Sh BUGS User information should (and eventually will) be stored elsewhere. .Sh HISTORY diff --git a/chpass/chpass.c b/chpass/chpass.c index 086413d..bba8b3d 100644 --- a/chpass/chpass.c +++ b/chpass/chpass.c @@ -40,7 +40,7 @@ static char copyright[] = #ifndef lint static char sccsid[] = "From: @(#)chpass.c 8.4 (Berkeley) 4/2/94"; static char rcsid[] = - "$Id: chpass.c,v 1.2 1995/01/14 23:14:25 wollman Exp $"; + "$Id: chpass.c,v 1.3 1995/05/30 06:29:36 rgrimes Exp $"; #endif /* not lint */ #include <sys/param.h> @@ -62,6 +62,9 @@ static char rcsid[] = #include <pw_scan.h> #include <pw_util.h> #include "pw_copy.h" +#ifdef YP +#include "pw_yp.h" +#endif #include "chpass.h" #include "pathnames.h" @@ -122,7 +125,6 @@ main(argc, argv) default: usage(); } - if (op == NEWSH) { /* protect p_shell -- it thinks NULL is /bin/sh */ if (!arg[0]) @@ -149,6 +151,23 @@ main(argc, argv) pw->pw_passwd = arg; } +#ifdef YP + /* + * XXX The man page says the data returned by getpwent() + * and friends is stored in static buffers that may be + * overwritten after successive invokations. Unfortunately, + * we need to call getpwent() more than once with NIS + * enabled. + */ + pw->pw_name = strdup(pw->pw_name); + pw->pw_passwd = strdup(pw->pw_passwd); + pw->pw_class = strdup(pw->pw_class); + pw->pw_gecos = strdup(pw->pw_gecos); + pw->pw_shell = strdup(pw->pw_shell); + pw->pw_dir = strdup(pw->pw_dir); + _use_yp = use_yp(pw->pw_name); +#endif /* YP */ + /* * The temporary file/file descriptor usage is a little tricky here. * 1: We start off with two fd's, one for the master password @@ -185,10 +204,19 @@ main(argc, argv) tfd = pw_tmp(); } +#ifdef YP + if (_use_yp) { + yp_submit(pw); + (void)unlink(tempname); + } else { +#endif /* YP */ pw_copy(pfd, tfd, pw); if (!pw_mkdb()) pw_error((char *)NULL, 0, 1); +#ifdef YP + } +#endif /* YP */ exit(0); } diff --git a/chpass/edit.c b/chpass/edit.c index 612cb4a..c0f61e0 100644 --- a/chpass/edit.c +++ b/chpass/edit.c @@ -52,6 +52,9 @@ static char sccsid[] = "@(#)edit.c 8.3 (Berkeley) 4/2/94"; #include <pw_util.h> #include "chpass.h" +#ifdef YP +#include "pw_yp.h" +#endif /* YP */ extern char *tempname; @@ -94,8 +97,13 @@ display(fd, pw) pw_error(tempname, 1, 1); (void)fprintf(fp, - "#Changing user database information for %s.\n", pw->pw_name); +#ifdef YP + "#Changing %s information for %s.\n", _use_yp ? "NIS" : "user database", pw->pw_name); + if (!uid && !_use_yp) { +#else + "#Changing user database information for %s.\n", pw->pw_name) if (!uid) { +#endif /* YP */ (void)fprintf(fp, "Login: %s\n", pw->pw_name); (void)fprintf(fp, "Password: %s\n", pw->pw_passwd); (void)fprintf(fp, "Uid [#]: %d\n", pw->pw_uid); diff --git a/chpass/pw_copy.c b/chpass/pw_copy.c index 3db04ed..4a1d9a5 100644 --- a/chpass/pw_copy.c +++ b/chpass/pw_copy.c @@ -96,6 +96,14 @@ pw_copy(ffd, tfd, pw) goto err; } if (!done) +#ifdef YP + /* Ultra paranoid: shouldn't happen. */ + if (getuid()) { + warnx("%s: not found in %s -- permission denied", + pw->pw_name, _PATH_MASTERPASSWD); + pw_error(NULL, 0, 1); + } else +#endif /* YP */ (void)fprintf(to, "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class, pw->pw_change, pw->pw_expire, pw->pw_gecos, diff --git a/chpass/pw_yp.c b/chpass/pw_yp.c new file mode 100644 index 0000000..6fd87f5 --- /dev/null +++ b/chpass/pw_yp.c @@ -0,0 +1,241 @@ +/* + * Copyright (c) 1995 + * 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 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. + * + * NIS interface routines for chpass + * + * Written by Bill Paul <wpaul@ctr.columbia.edu> + * Center for Telecommunications Research + * Columbia University, New York City + * + * $Id$ + */ + +#ifdef YP +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <netdb.h> +#include <time.h> +#include <sys/types.h> +#include <pwd.h> +#include <errno.h> +#include <err.h> +#include <unistd.h> +#include <db.h> +#include <fcntl.h> +#include <utmp.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/param.h> +#include <limits.h> +#include <rpc/rpc.h> +#include <rpcsvc/yp_prot.h> +#include <rpcsvc/ypclnt.h> +#include <rpcsvc/yppasswd.h> +#include <pw_util.h> +#include "pw_yp.h" + +#define PERM_SECURE (S_IRUSR|S_IWUSR) +HASHINFO openinfo = { + 4096, /* bsize */ + 32, /* ffactor */ + 256, /* nelem */ + 2048 * 1024, /* cachesize */ + NULL, /* hash */ + 0, /* lorder */ +}; + +int _use_yp = 0; + +/* + * Check if the user we're working with is local or in NIS. + */ +int use_yp (user) +char *user; +{ + int yp_enabled = 0, user_not_local = 0, exists = 0; + DB *dbp; + DBT key,data; + char bf[UT_NAMESIZE + 2]; + + if ((dbp = dbopen(_PATH_MP_DB, O_RDONLY, PERM_SECURE, + DB_HASH, &openinfo)) == NULL) + errx(1, "error opening database: %s.", _PATH_MP_DB); + bf[0] = _PW_KEYYPENABLED; + key.data = (u_char *)bf; + key.size = 1; + if (!(dbp->get)(dbp,&key,&data,0)) + yp_enabled = 1; + + bf[0] = _PW_KEYBYNAME; + bcopy((char *)user, bf + 1, MIN(strlen(user), UT_NAMESIZE)); + key.data = (u_char *)bf; + key.size = strlen(user) + 1; + if ((dbp->get)(dbp,&key,&data,0)) + user_not_local = 1; + + (dbp->close)(dbp); + + if (getpwnam(user) != NULL) + exists = 1; + + if (yp_enabled && user_not_local && exists) + return(1); + else + return(0); +} + +/* + * Find the name of the NIS master server for this domain + * and make sure it's running yppasswdd. + */ +static char *get_yp_master(void) +{ + char *domain, *mastername; + int rval; + + /* Get default NIS domain. */ + + if ((rval = yp_get_default_domain(&domain))) { + warnx("can't get local NIS domain name: %s",yperr_string(rval)); + pw_error(NULL, 0, 1); + } + + /* Get master server of passwd map. */ + + if ((rval = yp_master(domain, "passwd.byname", &mastername))) { + warnx("can't get master NIS server: %s", yperr_string(rval)); + pw_error(NULL, 0, 1); + } + + /* Check if yppasswdd is out there. */ + + if ((rval = getrpcport(mastername, YPPASSWDPROG, YPPASSWDPROC_UPDATE, + IPPROTO_UDP)) == 0) { + warnx("yppasswdd not running on NIS master server"); + pw_error(NULL, 0, 1); + } + + /* + * Make sure it's on a reserved port. + * XXX Might break with yppasswdd servers running on Solaris 2.x. + */ + + if (rval >= IPPORT_RESERVED) { + warnx("yppasswdd server not running on reserved port"); + pw_error(NULL, 0, 1); + } + + /* Everything checks out: return the name of the server. */ + + return (mastername); +} +/* + * Ask the user for his NIS password and submit the new information + * to yppasswdd. Note that yppasswdd requires password authentication + * and only allows changes to existing records rather than the addition + * of new records. (To do actual updates we would need something like + * secure RPC and ypupdated, which FreeBSD doesn't have yet.) This means + * that the superuser cannot use chpass(1) to add new users records to + * the NIS password database. + */ +void yp_submit(pw) +struct passwd *pw; +{ + struct yppasswd yppasswd; + CLIENT *clnt; + char *master, *password, *encpass; + int rval, status = 0; + struct timeval tv; + + /* Populate the yppasswd structure that gets handed to yppasswdd. */ + /* + * XXX This is done first to work around what looks like a very + * strange memory corruption bug: the text fields pointed to + * by the members of the 'pw' structure appear to be clobbered + * after get_yp_master() returns (in particular, it happens + * during getrpcport()). I don't know exactly where the problem + * lies: I traced it all the way to gethostbyname(), then gave + * up. + */ + yppasswd.newpw.pw_passwd = strdup(pw->pw_passwd); + yppasswd.newpw.pw_name = strdup(pw->pw_name); + yppasswd.newpw.pw_uid = pw->pw_uid; + yppasswd.newpw.pw_gid = pw->pw_gid; + yppasswd.newpw.pw_gecos = strdup(pw->pw_gecos); + yppasswd.newpw.pw_dir = strdup(pw->pw_dir); + yppasswd.newpw.pw_shell = strdup(pw->pw_shell); + + /* Get NIS master server name */ + + master = get_yp_master(); + + /* Get the user's password for authentication purposes. */ + + printf ("Changing NIS information for %s on %s\n", + yppasswd.newpw.pw_name, master); + encpass = (getpwnam(yppasswd.newpw.pw_name))->pw_passwd; + password = getpass("Please enter password: "); + if (strncmp(crypt(password, encpass), encpass, strlen(encpass))) { + warnx("Password incorrect."); + pw_error(NULL, 0, 1); + } + + yppasswd.oldpass = password; /* XXX */ + + /* Create a handle to yppasswdd. */ + + clnt = clnt_create(master, YPPASSWDPROG, YPPASSWDVERS, "udp"); + clnt->cl_auth = authunix_create_default(); + + /* Set a timeout and make the RPC call. */ + + tv.tv_sec = 20; + tv.tv_usec = 0; + rval = clnt_call(clnt, YPPASSWDPROC_UPDATE, xdr_yppasswd, + (char *)&yppasswd, xdr_int, (char *)&status, &tv); + + /* Call failed: signal the error. */ + + if (rval) { + warnx("NIS update failed: %s", clnt_sperrno(rval)); + pw_error(NULL, 0, 1); + } + + /* Success. */ + + auth_destroy(clnt->cl_auth); + clnt_destroy(clnt); + warnx("NIS information changed on host %s", master); + + return; +} +#endif /* YP */ diff --git a/chpass/pw_yp.h b/chpass/pw_yp.h new file mode 100644 index 0000000..94c7a74 --- /dev/null +++ b/chpass/pw_yp.h @@ -0,0 +1,45 @@ +/* + * Copyright (c) 1995 + * 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 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. + * + * NIS interface routines for chpass + * + * Written by Bill Paul <wpaul@ctr.columbia.edu> + * Center for Telecommunications Research + * Columbia University, New York City + * + * $Id$ + */ + +#ifdef YP +extern int _use_yp; +void yp_submit __P(( struct passwd * )); +int use_yp __P(( char * )); +#endif /* YP */ |