util.subproj/putpwpasswd.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 1.1 (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  * putpwpasswd()
  26  * Copyright (C) 1989 by NeXT, Inc.
  27  *
  28  * Changes a user's password entry. Works only for NetInfo.
  29  *
  30  * NOTE: This is not done in lookupd because we need to know
  31  * the identity of the user and there is currently no way to
  32  * get that information through a Mach message. Privileged users
  33  * get privileged sockets and do not need to supply a old password
  34  * if they are changing their password on the master server for their
  35  * account entry. Unprivileged users get unprivileged sockets and must
  36  * supply the old password.
  37  */
  38 #include <stdlib.h>
  39 #include <stdio.h>
  40 #include <pwd.h>
  41 #include <ctype.h>
  42 #include <netinfo/ni.h>
  43 #include <libc.h>
  44
  45 static const ni_name NAME_USERS = "users";
  46 static const ni_name NAME_PASSWD = "passwd";
  47
  48 static int
  49 changeit(
  50          void *ni,
  51          ni_id *id,
  52          char *login,
  53          char *old_passwd,
  54          char *new_passwd
  55          )
  56 {
  57         ni_proplist pl;
  58         ni_index i;
  59         ni_index prop_index;
  60         ni_property prop;
  61         ni_status stat;
  62
  63         ni_setabort(ni, TRUE);
  64         ni_needwrite(ni, TRUE);
  65         ni_setuser(ni, login);
  66         ni_setpassword(ni, old_passwd);
  67
  68         if (ni_read(ni, id, &pl) != NI_OK) {
  69                 return (0);
  70         }
  71         prop_index = NI_INDEX_NULL;
  72         for (i = 0; i < pl.nipl_len; i++) {
  73                 if (ni_name_match(pl.nipl_val[i].nip_name, NAME_PASSWD)) {
  74                         prop_index = i;
  75                         break;
  76                 }
  77         }
  78         if (prop_index == NI_INDEX_NULL) {
  79                 prop.nip_name = NAME_PASSWD;
  80                 prop.nip_val.ninl_len = 1;
  81                 prop.nip_val.ninl_val = &new_passwd;
  82                 stat = ni_createprop(ni, id, prop, NI_INDEX_NULL);
  83         } else {
  84                 if (pl.nipl_val[i].nip_val.ninl_len == 0) {
  85                         stat = ni_createname(ni, id, prop_index,
  86                                              new_passwd, 0);
  87                 } else {
  88                         stat = ni_writename(ni, id, prop_index, 0,
  89                                             new_passwd);
  90                 }
  91         }
  92         ni_proplist_free(&pl);
  93         return (stat == NI_OK);
  94 }
  95
  96 int
  97 putpwpasswd(
  98             char *login,
  99             char *old_passwd, /* cleartext */
 100             char *new_passwd /* encrypted */
 101             )
 102 {
 103         char *dir;
 104         void *ni;
 105         void *newni;
 106         ni_id id;
 107         ni_status stat;
 108         int changed;
 109
 110         stat = ni_open(NULL, ".", &ni);
 111         if (stat != NI_OK) {
 112                 return (0);
 113         }
 114
 115         dir = malloc(1 + strlen(NAME_USERS) + 1 + strlen(login) + 1);
 116         sprintf(dir, "/%s/%s", NAME_USERS, login);
 117
 118         changed = 0;
 119         for (;;) {
 120                 stat = ni_pathsearch(ni, &id, dir);
 121                 if (stat == NI_OK) {
 122                         changed = changeit(ni, &id, login, old_passwd,
 123                                            new_passwd);
 124                         break;
 125                 }
 126                 stat = ni_open(ni, "..", &newni);
 127                 if (stat != NI_OK) {
 128                         break;
 129                 }
 130                 ni_free(ni);
 131                 ni = newni;
 132         }
 133         free(dir);
 134         ni_free(ni);
 135         return (changed);
 136 }
 137