passwd.tproj/nis_passwd.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Portions Copyright (c) 1998 by Apple Computer, Inc.
  26  * Portions Copyright (c) 1988 by Sun Microsystems, Inc.
  27  * Portions Copyright (c) 1988 The Regents of the University of California.
  28  * All rights reserved.
  29  *
  30  * Redistribution and use in source and binary forms, with or without
  31  * modification, are permitted provided that the following conditions
  32  * are met:
  33  * 1. Redistributions of source code must retain the above copyright
  34  *    notice, this list of conditions and the following disclaimer.
  35  * 2. Redistributions in binary form must reproduce the above copyright
  36  *    notice, this list of conditions and the following disclaimer in the
  37  *    documentation and/or other materials provided with the distribution.
  38  * 3. All advertising materials mentioning features or use of this software
  39  *    must display the following acknowledgement:
  40  *      This product includes software developed by the University of
  41  *      California, Berkeley and its contributors.
  42  * 4. Neither the name of the University nor the names of its contributors
  43  *    may be used to endorse or promote products derived from this software
  44  *    without specific prior written permission.
  45  *
  46  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  49  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  50  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  56  * SUCH DAMAGE.
  57  */
  58
  59
  60 /* update a user's password in NIS. This was based on the Sun implementation
  61  * we used in NEXTSTEP, although I've added some stuff from OpenBSD. And
  62  * it uses the API to support Rhapsody's proprietry infosystem switch.
  63  * lukeh
  64  */
  65
  66 #include <stdio.h>
  67 #include <stdlib.h>
  68 #include <unistd.h>
  69 #include <string.h>
  70 #include <pwd.h>
  71 #include <netinet/in.h>
  72 #include <rpc/types.h>
  73 #include <rpc/xdr.h>
  74 #include <rpc/rpc.h>
  75 #include <rpcsvc/yp_prot.h>
  76 #include <rpcsvc/ypclnt.h>
  77 #include <rpcsvc/yppasswd.h>
  78 #include <netdb.h>
  79 #include <sys/socket.h>
  80 #include <sys/file.h>
  81 #include <errno.h>
  82
  83 extern int getrpcport(char *, int, int, int);
  84 extern void getpasswd(char *, int, int, int, int, char *, char **, char**, char **);
  85
  86 static struct passwd *ypgetpwnam(char *name, char *domain);
  87
  88 int nis_passwd(char *uname, char *domain)
  89 {
  90         int ans, port, ok = -1;
  91         char *master;
  92         char *ne;       /* new encrypted password */
  93         char *oc;       /* old cleartext password */
  94         char *nc;       /* new cleartext password */
  95         static struct yppasswd  yppasswd;
  96         struct passwd *pwd;
  97         int uid;
  98         struct timeval tv;
  99         CLIENT *cl;
 100
 101         if (domain == NULL)
 102         {
 103                 if (yp_get_default_domain(&domain) != 0)
 104                 {
 105                         (void)fprintf(stderr, "can't get domain\n");
 106                         exit(1);
 107                 }
 108         }
 109
 110         if (yp_master(domain, "passwd.byname", &master) != 0)
 111         {
 112                 (void)fprintf(stderr, "can't get master for passwd file\n");
 113                 exit(1);
 114         }
 115
 116         port = getrpcport(master, YPPASSWDPROG, YPPASSWDPROC_UPDATE,
 117                 IPPROTO_UDP);
 118         if (port == 0)
 119         {
 120                 (void)fprintf(stderr, "%s is not running yppasswd daemon\n",
 121                               master);
 122                 exit(1);
 123         }
 124         if (port >= IPPORT_RESERVED)
 125         {
 126                 (void)fprintf(stderr,
 127                     "yppasswd daemon is not running on privileged port\n");
 128                 exit(1);
 129         }
 130
 131         pwd = ypgetpwnam(uname, domain);
 132         if (pwd == NULL)
 133         {
 134                 (void)fprintf(stderr, "user %s not found\n", uname);
 135                 exit(1);
 136         }
 137
 138         uid = getuid();
 139         if (uid != 0 && uid != pwd->pw_uid)
 140         {
 141                 (void)fprintf(stderr, "you may only change your own password\n");
 142                 exit(1);
 143         }
 144
 145         getpasswd(uname, 0, 5, 0, 0, pwd->pw_passwd, &ne, &oc, &nc);
 146
 147         yppasswd.oldpass = oc;
 148         yppasswd.newpw.pw_name = pwd->pw_name;
 149         yppasswd.newpw.pw_passwd = ne;
 150         yppasswd.newpw.pw_uid = pwd->pw_uid;
 151         yppasswd.newpw.pw_gid = pwd->pw_gid;
 152         yppasswd.newpw.pw_gecos = pwd->pw_gecos;
 153         yppasswd.newpw.pw_dir = pwd->pw_dir;
 154         yppasswd.newpw.pw_shell = pwd->pw_shell;
 155
 156         cl = clnt_create(master, YPPASSWDPROG, YPPASSWDVERS, "udp");
 157         if (cl == NULL)
 158         {
 159                 (void)fprintf(stderr, "could not contact yppasswdd on %s\n", master);
 160                 exit(1);
 161         }
 162         cl->cl_auth = authunix_create_default();
 163         tv.tv_sec = 2;
 164         tv.tv_usec = 0;
 165         ans = clnt_call(cl, YPPASSWDPROC_UPDATE,
 166                 (xdrproc_t)xdr_yppasswd, &yppasswd, (xdrproc_t)xdr_int, &ok, tv);
 167
 168         if (ans != 0)
 169         {
 170                 clnt_perrno(ans);
 171                 (void)fprintf(stderr, "\n");
 172                 (void)fprintf(stderr, "couldn't change passwd\n");
 173                 exit(1);
 174         }
 175         if (ok != 0)
 176         {
 177                 (void)fprintf(stderr, "couldn't change passwd\n");
 178                 exit(1);
 179         }
 180         return(0);
 181 }
 182
 183 static char *
 184 pwskip(register char *p)
 185 {
 186         while (*p && *p != ':' && *p != '\n')
 187                 ++p;
 188         if (*p)
 189                 *p++ = 0;
 190         return (p);
 191 }
 192
 193 struct passwd *
 194 interpret(struct passwd *pwent, char *line)
 195 {
 196         register char   *p = line;
 197
 198         pwent->pw_passwd = "*";
 199         pwent->pw_uid = 0;
 200         pwent->pw_gid = 0;
 201         pwent->pw_gecos = "";
 202         pwent->pw_dir = "";
 203         pwent->pw_shell = "";
 204 #ifndef __SLICK__
 205         pwent->pw_change = 0;
 206         pwent->pw_expire = 0;
 207         pwent->pw_class = "";
 208 #endif
 209
 210         /* line without colon separators is no good, so ignore it */
 211         if(!strchr(p, ':'))
 212                 return(NULL);
 213
 214         pwent->pw_name = p;
 215         p = pwskip(p);
 216         pwent->pw_passwd = p;
 217         p = pwskip(p);
 218         pwent->pw_uid = (uid_t)strtoul(p, NULL, 10);
 219         p = pwskip(p);
 220         pwent->pw_gid = (gid_t)strtoul(p, NULL, 10);
 221         p = pwskip(p);
 222         pwent->pw_gecos = p;
 223         p = pwskip(p);
 224         pwent->pw_dir = p;
 225         p = pwskip(p);
 226         pwent->pw_shell = p;
 227         while (*p && *p != '\n')
 228                 p++;
 229         *p = '\0';
 230         return (pwent);
 231 }
 232
 233
 234 static struct passwd *
 235 ypgetpwnam(char *nam, char *domain)
 236 {
 237         static struct passwd pwent;
 238         char *val;
 239         int reason, vallen;
 240         static char *__yplin = NULL;
 241
 242         reason = yp_match(domain, "passwd.byname", nam, strlen(nam),
 243             &val, &vallen);
 244         switch(reason) {
 245         case 0:
 246                 break;
 247         default:
 248                 return (NULL);
 249                 break;
 250         }
 251         val[vallen] = '\0';
 252         if (__yplin)
 253                 free(__yplin);
 254         __yplin = (char *)malloc(vallen + 1);
 255         strcpy(__yplin, val);
 256         free(val);
 257
 258         return(interpret(&pwent, __yplin));
 259 }