usr.bin/passwd/yp_passwd.c

   1 /*
   2  * Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca>
   3  * Copyright (c) 1994 Olaf Kirch <okir@monad.swb.de>
   4  * Copyright (c) 1995 Bill Paul <wpaul@ctr.columbia.edu>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The name of the author may not be used to endorse or promote
  16  *    products derived from this software without specific prior written
  17  *    permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  20  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  21  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  23  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * $FreeBSD: src/usr.bin/passwd/yp_passwd.c,v 1.15.6.1 2002/02/15 00:46:56 des Exp $
  32  * $DragonFly: src/usr.bin/passwd/yp_passwd.c,v 1.2 2003/06/17 04:29:30 dillon Exp $
  33  */
  34
  35 #ifdef YP
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include <netdb.h>
  40 #include <time.h>
  41 #include <sys/types.h>
  42 #include <pwd.h>
  43 #include <errno.h>
  44 #include <unistd.h>
  45 #include <limits.h>
  46 #include <rpc/rpc.h>
  47 #include <rpcsvc/yp_prot.h>
  48 #include <rpcsvc/ypclnt.h>
  49 #include <rpcsvc/yppasswd.h>
  50 #include <pw_yp.h>
  51 #include <err.h>
  52 #include "yppasswd_private.h"
  53
  54 extern char *getnewpasswd(struct passwd *, int);
  55
  56 int
  57 yp_passwd(char *user)
  58 {
  59         struct yppasswd yppasswd;
  60         struct master_yppasswd master_yppasswd;
  61         struct passwd *pw;
  62         CLIENT *clnt;
  63         struct rpc_err err;
  64         char   *master;
  65         int    *status = NULL;
  66         uid_t   uid;
  67         char                    *sockname = YP_SOCKNAME;
  68
  69         _use_yp = 1;
  70
  71         uid = getuid();
  72
  73         if ((master = get_yp_master(1)) == NULL) {
  74                 warnx("failed to find NIS master server");
  75                 return(1);
  76         }
  77
  78         /*
  79          * It is presumed that by the time we get here, use_yp()
  80          * has been called and that we have verified that the user
  81          * actually exists. This being the case, the yp_password
  82          * stucture has already been filled in for us.
  83          */
  84
  85         /* Use the correct password */
  86         pw = (struct passwd *)&yp_password;
  87
  88         if (pw->pw_uid != uid && uid != 0) {
  89                 warnx("only the super-user may change account information \
  90 for other users");
  91                 return(1);
  92         }
  93
  94         pw->pw_change = 0;
  95
  96         /* Initialize password information */
  97         if (suser_override) {
  98                 master_yppasswd.newpw.pw_passwd = strdup(pw->pw_passwd);
  99                 master_yppasswd.newpw.pw_name = strdup(pw->pw_name);
 100                 master_yppasswd.newpw.pw_uid = pw->pw_uid;
 101                 master_yppasswd.newpw.pw_gid = pw->pw_gid;
 102                 master_yppasswd.newpw.pw_expire = pw->pw_expire;
 103                 master_yppasswd.newpw.pw_change = pw->pw_change;
 104                 master_yppasswd.newpw.pw_fields = pw->pw_fields;
 105                 master_yppasswd.newpw.pw_gecos = strdup(pw->pw_gecos);
 106                 master_yppasswd.newpw.pw_dir = strdup(pw->pw_dir);
 107                 master_yppasswd.newpw.pw_shell = strdup(pw->pw_shell);
 108                 master_yppasswd.newpw.pw_class = pw->pw_class != NULL ?
 109                                         strdup(pw->pw_class) : "";
 110                 master_yppasswd.oldpass = "";
 111                 master_yppasswd.domain = yp_domain;
 112         } else {
 113                 yppasswd.newpw.pw_passwd = strdup(pw->pw_passwd);
 114                 yppasswd.newpw.pw_name = strdup(pw->pw_name);
 115                 yppasswd.newpw.pw_uid = pw->pw_uid;
 116                 yppasswd.newpw.pw_gid = pw->pw_gid;
 117                 yppasswd.newpw.pw_gecos = strdup(pw->pw_gecos);
 118                 yppasswd.newpw.pw_dir = strdup(pw->pw_dir);
 119                 yppasswd.newpw.pw_shell = strdup(pw->pw_shell);
 120                 yppasswd.oldpass = "";
 121         }
 122
 123         if (suser_override)
 124                 printf("Changing NIS password for %s on %s in domain %s.\n",
 125                         pw->pw_name, master, yp_domain);
 126         else
 127                 printf("Changing NIS password for %s on %s.\n",
 128                                                         pw->pw_name, master);
 129
 130         /* Get old password */
 131
 132         if (pw->pw_passwd[0] && !suser_override) {
 133                 yppasswd.oldpass = strdup(getpass("Old Password: "));
 134                 if (strcmp(crypt(yppasswd.oldpass, pw->pw_passwd),
 135                                                         pw->pw_passwd)) {
 136                         errx(1, "sorry");
 137                 }
 138
 139         }
 140
 141         if (suser_override) {
 142                 if ((master_yppasswd.newpw.pw_passwd = getnewpasswd(pw, 1)) == NULL)
 143                         return(1);
 144         } else {
 145                 if ((yppasswd.newpw.pw_passwd = getnewpasswd(pw, 1)) == NULL)
 146                         return(1);
 147         }
 148
 149         if (suser_override) {
 150                 if ((clnt = clnt_create(sockname, MASTER_YPPASSWDPROG,
 151                                 MASTER_YPPASSWDVERS, "unix")) == NULL) {
 152                         warnx("failed to contact rpc.yppasswdd on host %s: %s",
 153                                 master, clnt_spcreateerror(""));
 154                         return(1);
 155                 }
 156         } else {
 157                 if ((clnt = clnt_create(master, YPPASSWDPROG,
 158                                 YPPASSWDVERS, "udp")) == NULL) {
 159                         warnx("failed to contact rpc.yppasswdd on host %s: %s",
 160                                 master, clnt_spcreateerror(""));
 161                         return(1);
 162                 }
 163         }
 164         /*
 165          * The yppasswd.x file said `unix authentication required',
 166          * so I added it. This is the only reason it is in here.
 167          * My yppasswdd doesn't use it, but maybe some others out there
 168          * do.                                  --okir
 169          */
 170         clnt->cl_auth = authunix_create_default();
 171
 172         if (suser_override)
 173                 status = yppasswdproc_update_master_1(&master_yppasswd, clnt);
 174         else
 175                 status = yppasswdproc_update_1(&yppasswd, clnt);
 176
 177         clnt_geterr(clnt, &err);
 178
 179         auth_destroy(clnt->cl_auth);
 180         clnt_destroy(clnt);
 181
 182         if (err.re_status != RPC_SUCCESS || status == NULL || *status) {
 183                 errx(1, "failed to change NIS password: %s",
 184                         clnt_sperrno(err.re_status));
 185         }
 186
 187         printf("\nNIS password has%s been changed on %s.\n",
 188                 (err.re_status != RPC_SUCCESS || status == NULL || *status) ?
 189                 " not" : "", master);
 190
 191         return ((err.re_status || status == NULL || *status));
 192 }
 193 #endif /* YP */