chkpasswd.tproj/nis_passwd.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1998 by Apple Computer, Inc.
  27  * Portions Copyright (c) 1988 by Sun Microsystems, Inc.
  28  * Portions Copyright (c) 1988 The Regents of the University of California.
  29  * All rights reserved.
  30  *
  31  * Redistribution and use in source and binary forms, with or without
  32  * modification, are permitted provided that the following conditions
  33  * are met:
  34  * 1. Redistributions of source code must retain the above copyright
  35  *    notice, this list of conditions and the following disclaimer.
  36  * 2. Redistributions in binary form must reproduce the above copyright
  37  *    notice, this list of conditions and the following disclaimer in the
  38  *    documentation and/or other materials provided with the distribution.
  39  * 3. All advertising materials mentioning features or use of this software
  40  *    must display the following acknowledgement:
  41  *      This product includes software developed by the University of
  42  *      California, Berkeley and its contributors.
  43  * 4. Neither the name of the University nor the names of its contributors
  44  *    may be used to endorse or promote products derived from this software
  45  *    without specific prior written permission.
  46  *
  47  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  48  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  50  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  51  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  52  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  53  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  54  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  55  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  56  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  57  * SUCH DAMAGE.
  58  */
  59
  60
  61 /* update a user's password in NIS. This was based on the Sun implementation
  62  * we used in NEXTSTEP, although I've added some stuff from OpenBSD. And
  63  * it uses the API to support Rhapsody's proprietry infosystem switch.
  64  * lukeh
  65  */
  66
  67 #include <stdio.h>
  68 #include <stdlib.h>
  69 #include <unistd.h>
  70 #include <string.h>
  71 #include <pwd.h>
  72 #include <netinet/in.h>
  73 #include <rpc/types.h>
  74 #include <rpc/xdr.h>
  75 #include <rpc/rpc.h>
  76 #include <rpcsvc/yp_prot.h>
  77 #include <rpcsvc/ypclnt.h>
  78 #include <rpcsvc/yppasswd.h>
  79 #include <netdb.h>
  80 #include <sys/socket.h>
  81 #include <sys/file.h>
  82 #include <errno.h>
  83
  84 extern int getrpcport(char *, int, int, int);
  85 extern void checkpasswd(char *, char *);
  86
  87 static struct passwd *ypgetpwnam(char *name, char *domain);
  88
  89 int nis_check_passwd(char *uname, char *domain)
  90 {
  91         int port;
  92         char *master;
  93         struct passwd *pwd;
  94
  95         if (domain == NULL)
  96         {
  97                 if (yp_get_default_domain(&domain) != 0)
  98                 {
  99                         (void)fprintf(stderr, "can't get domain\n");
 100                         exit(1);
 101                 }
 102         }
 103
 104         if (yp_master(domain, "passwd.byname", &master) != 0)
 105         {
 106                 (void)fprintf(stderr, "can't get master for passwd file\n");
 107                 exit(1);
 108         }
 109
 110         port = getrpcport(master, YPPASSWDPROG, YPPASSWDPROC_UPDATE,
 111                 IPPROTO_UDP);
 112         if (port == 0)
 113         {
 114                 (void)fprintf(stderr, "%s is not running yppasswd daemon\n",
 115                               master);
 116                 exit(1);
 117         }
 118         if (port >= IPPORT_RESERVED)
 119         {
 120                 (void)fprintf(stderr,
 121                     "yppasswd daemon is not running on privileged port\n");
 122                 exit(1);
 123         }
 124
 125         pwd = ypgetpwnam(uname, domain);
 126         if (pwd == NULL)
 127         {
 128                 (void)fprintf(stderr, "user %s not found\n", uname);
 129                 exit(1);
 130         }
 131
 132         checkpasswd(uname, pwd->pw_passwd);
 133         return(0);
 134 }
 135
 136 static char *
 137 pwskip(register char *p)
 138 {
 139         while (*p && *p != ':' && *p != '\n')
 140                 ++p;
 141         if (*p)
 142                 *p++ = 0;
 143         return (p);
 144 }
 145
 146 struct passwd *
 147 interpret(struct passwd *pwent, char *line)
 148 {
 149         register char   *p = line;
 150
 151         pwent->pw_passwd = "*";
 152         pwent->pw_uid = 0;
 153         pwent->pw_gid = 0;
 154         pwent->pw_gecos = "";
 155         pwent->pw_dir = "";
 156         pwent->pw_shell = "";
 157 #ifndef __SLICK__
 158         pwent->pw_change = 0;
 159         pwent->pw_expire = 0;
 160         pwent->pw_class = "";
 161 #endif
 162
 163         /* line without colon separators is no good, so ignore it */
 164         if(!strchr(p, ':'))
 165                 return(NULL);
 166
 167         pwent->pw_name = p;
 168         p = pwskip(p);
 169         pwent->pw_passwd = p;
 170         p = pwskip(p);
 171         pwent->pw_uid = (uid_t)strtoul(p, NULL, 10);
 172         p = pwskip(p);
 173         pwent->pw_gid = (gid_t)strtoul(p, NULL, 10);
 174         p = pwskip(p);
 175         pwent->pw_gecos = p;
 176         p = pwskip(p);
 177         pwent->pw_dir = p;
 178         p = pwskip(p);
 179         pwent->pw_shell = p;
 180         while (*p && *p != '\n')
 181                 p++;
 182         *p = '\0';
 183         return (pwent);
 184 }
 185
 186
 187 static struct passwd *
 188 ypgetpwnam(char *nam, char *domain)
 189 {
 190         static struct passwd pwent;
 191         char *val;
 192         int reason, vallen;
 193         static char *__yplin = NULL;
 194
 195         reason = yp_match(domain, "passwd.byname", nam, strlen(nam),
 196             &val, &vallen);
 197         switch(reason) {
 198         case 0:
 199                 break;
 200         default:
 201                 return (NULL);
 202                 break;
 203         }
 204         val[vallen] = '\0';
 205         if (__yplin)
 206                 free(__yplin);
 207         __yplin = (char *)malloc(vallen + 1);
 208         strcpy(__yplin, val);
 209         free(val);
 210
 211         return(interpret(&pwent, __yplin));
 212 }