util.subproj/putpwpasswd.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  * putpwpasswd()
  27  * Copyright (C) 1989 by NeXT, Inc.
  28  *
  29  * Changes a user's password entry. Works only for NetInfo.
  30  *
  31  * NOTE: This is not done in lookupd because we need to know
  32  * the identity of the user and there is currently no way to
  33  * get that information through a Mach message. Privileged users
  34  * get privileged sockets and do not need to supply a old password
  35  * if they are changing their password on the master server for their
  36  * account entry. Unprivileged users get unprivileged sockets and must
  37  * supply the old password.
  38  */
  39 #include <stdlib.h>
  40 #include <stdio.h>
  41 #include <pwd.h>
  42 #include <ctype.h>
  43 #include <netinfo/ni.h>
  44 #include <libc.h>
  45
  46 static const ni_name NAME_USERS = "users";
  47 static const ni_name NAME_PASSWD = "passwd";
  48
  49 static int
  50 changeit(
  51          void *ni,
  52          ni_id *id,
  53          char *login,
  54          char *old_passwd,
  55          char *new_passwd
  56          )
  57 {
  58         ni_proplist pl;
  59         ni_index i;
  60         ni_index prop_index;
  61         ni_property prop;
  62         ni_status stat;
  63
  64         ni_setabort(ni, TRUE);
  65         ni_needwrite(ni, TRUE);
  66         ni_setuser(ni, login);
  67         ni_setpassword(ni, old_passwd);
  68
  69         if (ni_read(ni, id, &pl) != NI_OK) {
  70                 return (0);
  71         }
  72         prop_index = NI_INDEX_NULL;
  73         for (i = 0; i < pl.nipl_len; i++) {
  74                 if (ni_name_match(pl.nipl_val[i].nip_name, NAME_PASSWD)) {
  75                         prop_index = i;
  76                         break;
  77                 }
  78         }
  79         if (prop_index == NI_INDEX_NULL) {
  80                 prop.nip_name = NAME_PASSWD;
  81                 prop.nip_val.ninl_len = 1;
  82                 prop.nip_val.ninl_val = &new_passwd;
  83                 stat = ni_createprop(ni, id, prop, NI_INDEX_NULL);
  84         } else {
  85                 if (pl.nipl_val[i].nip_val.ninl_len == 0) {
  86                         stat = ni_createname(ni, id, prop_index,
  87                                              new_passwd, 0);
  88                 } else {
  89                         stat = ni_writename(ni, id, prop_index, 0,
  90                                             new_passwd);
  91                 }
  92         }
  93         ni_proplist_free(&pl);
  94         return (stat == NI_OK);
  95 }
  96
  97 int
  98 putpwpasswd(
  99             char *login,
 100             char *old_passwd, /* cleartext */
 101             char *new_passwd /* encrypted */
 102             )
 103 {
 104         char *dir;
 105         void *ni;
 106         void *newni;
 107         ni_id id;
 108         ni_status stat;
 109         int changed;
 110
 111         stat = ni_open(NULL, ".", &ni);
 112         if (stat != NI_OK) {
 113                 return (0);
 114         }
 115
 116         dir = malloc(1 + strlen(NAME_USERS) + 1 + strlen(login) + 1);
 117         sprintf(dir, "/%s/%s", NAME_USERS, login);
 118
 119         changed = 0;
 120         for (;;) {
 121                 stat = ni_pathsearch(ni, &id, dir);
 122                 if (stat == NI_OK) {
 123                         changed = changeit(ni, &id, login, old_passwd,
 124                                            new_passwd);
 125                         break;
 126                 }
 127                 stat = ni_open(ni, "..", &newni);
 128                 if (stat != NI_OK) {
 129                         break;
 130                 }
 131                 ni_free(ni);
 132                 ni = newni;
 133         }
 134         free(dir);
 135         ni_free(ni);
 136         return (changed);
 137 }
 138