chkpasswd.tproj/nis_passwd.c

   1 /*
   2  * Copyright (c) 1999-2016 Apple 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  * 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/rpc.h>
  73 #include <rpc/xdr.h>
  74 #include <rpc/pmap_clnt.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 #include "passwd.h"
  84
  85 static struct passwd *ypgetpwnam(char *name, char *domain);
  86
  87 int
  88 nis_check_passwd(char *uname, char *domain)
  89 {
  90         int port;
  91         char *master;
  92         struct passwd *pwd;
  93
  94         if (domain == NULL)
  95         {
  96                 if (yp_get_default_domain(&domain) != 0)
  97                 {
  98                         (void)fprintf(stderr, "can't get domain\n");
  99                         exit(1);
 100                 }
 101         }
 102
 103         if (yp_master(domain, "passwd.byname", &master) != 0)
 104         {
 105                 (void)fprintf(stderr, "can't get master for passwd file\n");
 106                 exit(1);
 107         }
 108
 109         port = getrpcport(master, YPPASSWDPROG, YPPASSWDPROC_UPDATE,
 110                 IPPROTO_UDP);
 111         if (port == 0)
 112         {
 113                 (void)fprintf(stderr, "%s is not running yppasswd daemon\n",
 114                               master);
 115                 exit(1);
 116         }
 117         if (port >= IPPORT_RESERVED)
 118         {
 119                 (void)fprintf(stderr,
 120                     "yppasswd daemon is not running on privileged port\n");
 121                 exit(1);
 122         }
 123
 124         pwd = ypgetpwnam(uname, domain);
 125         if (pwd == NULL)
 126         {
 127                 (void)fprintf(stderr, "user %s not found\n", uname);
 128                 exit(1);
 129         }
 130
 131         checkpasswd(uname, pwd->pw_passwd);
 132         return(0);
 133 }
 134
 135 static char *
 136 pwskip(register char *p)
 137 {
 138         while (*p && *p != ':' && *p != '\n')
 139                 ++p;
 140         if (*p)
 141                 *p++ = 0;
 142         return (p);
 143 }
 144
 145 static struct passwd *
 146 interpret(struct passwd *pwent, char *line)
 147 {
 148         register char   *p = line;
 149
 150         pwent->pw_passwd = "*";
 151         pwent->pw_uid = 0;
 152         pwent->pw_gid = 0;
 153         pwent->pw_gecos = "";
 154         pwent->pw_dir = "";
 155         pwent->pw_shell = "";
 156 #ifndef __SLICK__
 157         pwent->pw_change = 0;
 158         pwent->pw_expire = 0;
 159         pwent->pw_class = "";
 160 #endif
 161
 162         /* line without colon separators is no good, so ignore it */
 163         if(!strchr(p, ':'))
 164                 return(NULL);
 165
 166         pwent->pw_name = p;
 167         p = pwskip(p);
 168         pwent->pw_passwd = p;
 169         p = pwskip(p);
 170         pwent->pw_uid = (uid_t)strtoul(p, NULL, 10);
 171         p = pwskip(p);
 172         pwent->pw_gid = (gid_t)strtoul(p, NULL, 10);
 173         p = pwskip(p);
 174         pwent->pw_gecos = p;
 175         p = pwskip(p);
 176         pwent->pw_dir = p;
 177         p = pwskip(p);
 178         pwent->pw_shell = p;
 179         while (*p && *p != '\n')
 180                 p++;
 181         *p = '\0';
 182         return (pwent);
 183 }
 184
 185 static struct passwd *
 186 ypgetpwnam(char *nam, char *domain)
 187 {
 188         static struct passwd pwent;
 189         char *val;
 190         int reason, vallen;
 191         static char *__yplin = NULL;
 192
 193         reason = yp_match(domain, "passwd.byname", nam, (int)strlen(nam),
 194             &val, &vallen);
 195         switch(reason) {
 196         case 0:
 197                 break;
 198         default:
 199                 return (NULL);
 200                 break;
 201         }
 202         val[vallen] = '\0';
 203         if (__yplin)
 204                 free(__yplin);
 205         __yplin = (char *)malloc(vallen + 1);
 206         strcpy(__yplin, val);
 207         free(val);
 208
 209         return(interpret(&pwent, __yplin));
 210 }