source/passdb/smbpasschange.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    change a password in a local smbpasswd file
   5    Copyright (C) Andrew Tridgell 1998
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23
  24
  25 /*************************************************************
  26 add a new user to the local smbpasswd file
  27 *************************************************************/
  28
  29 static BOOL add_new_user(char *user_name, uid_t uid, int local_flags,
  30                          uchar *new_p16, uchar *new_nt_p16)
  31 {
  32         struct smb_passwd new_smb_pwent;
  33
  34         /* Create a new smb passwd entry and set it to the given password. */
  35         new_smb_pwent.smb_userid = uid;
  36         new_smb_pwent.smb_name = user_name;
  37         new_smb_pwent.smb_passwd = NULL;
  38         new_smb_pwent.smb_nt_passwd = NULL;
  39         new_smb_pwent.pass_last_set_time = time(NULL);
  40         new_smb_pwent.acct_ctrl = ((local_flags & LOCAL_TRUST_ACCOUNT) ? ACB_WSTRUST : ACB_NORMAL);
  41
  42         if(local_flags & LOCAL_DISABLE_USER) {
  43                 new_smb_pwent.acct_ctrl |= ACB_DISABLED;
  44         }
  45
  46         if (local_flags & LOCAL_SET_NO_PASSWORD) {
  47                 new_smb_pwent.acct_ctrl |= ACB_PWNOTREQ;
  48         } else {
  49                 new_smb_pwent.smb_passwd = new_p16;
  50                 new_smb_pwent.smb_nt_passwd = new_nt_p16;
  51         }
  52
  53
  54         return add_smbpwd_entry(&new_smb_pwent);
  55 }
  56
  57
  58 /*************************************************************
  59 change a password entry in the local smbpasswd file
  60 *************************************************************/
  61
  62 BOOL local_password_change(char *user_name, int local_flags,
  63                            char *new_passwd,
  64                            char *err_str, size_t err_str_len,
  65                            char *msg_str, size_t msg_str_len)
  66 {
  67         struct passwd  *pwd = NULL;
  68         void *vp;
  69         struct smb_passwd *smb_pwent;
  70         uchar           new_p16[16];
  71         uchar           new_nt_p16[16];
  72
  73         *err_str = '\0';
  74         *msg_str = '\0';
  75
  76         if (local_flags & LOCAL_ADD_USER) {
  77
  78                 /*
  79                  * Check for a local account - if we're adding only.
  80                  */
  81
  82                 if(!(pwd = sys_getpwnam(user_name))) {
  83                         slprintf(err_str, err_str_len - 1, "User %s does not \
  84 exist in system password file (usually /etc/passwd). Cannot add \
  85 account without a valid local system user.\n", user_name);
  86                         return False;
  87                 }
  88         }
  89
  90         /* Calculate the MD4 hash (NT compatible) of the new password. */
  91         nt_lm_owf_gen(new_passwd, new_nt_p16, new_p16);
  92
  93         /*
  94          * Open the smbpaswd file.
  95          */
  96         vp = startsmbpwent(True);
  97         if (!vp && errno == ENOENT) {
  98                 FILE *fp;
  99                 slprintf(msg_str,msg_str_len-1,
 100                         "smbpasswd file did not exist - attempting to create it.\n");
 101                 fp = sys_fopen(lp_smb_passwd_file(), "w");
 102                 if (fp) {
 103                         fprintf(fp, "# Samba SMB password file\n");
 104                         fclose(fp);
 105                         vp = startsmbpwent(True);
 106                 }
 107         }
 108
 109         if (!vp) {
 110                 slprintf(err_str, err_str_len-1, "Cannot open file %s. Error was %s\n",
 111                         lp_smb_passwd_file(), strerror(errno) );
 112                 return False;
 113         }
 114
 115         /* Get the smb passwd entry for this user */
 116         smb_pwent = getsmbpwnam(user_name);
 117         if (smb_pwent == NULL) {
 118                 if(!(local_flags & LOCAL_ADD_USER)) {
 119                         slprintf(err_str, err_str_len-1,
 120                                 "Failed to find entry for user %s.\n", user_name);
 121                         endsmbpwent(vp);
 122                         return False;
 123                 }
 124
 125                 if (add_new_user(user_name, pwd->pw_uid, local_flags, new_p16, new_nt_p16)) {
 126                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
 127                         endsmbpwent(vp);
 128                         return True;
 129                 } else {
 130                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
 131                         endsmbpwent(vp);
 132                         return False;
 133                 }
 134         } else {
 135                 /* the entry already existed */
 136                 local_flags &= ~LOCAL_ADD_USER;
 137         }
 138
 139         /*
 140          * We are root - just write the new password
 141          * and the valid last change time.
 142          */
 143
 144         if(local_flags & LOCAL_DISABLE_USER) {
 145                 smb_pwent->acct_ctrl |= ACB_DISABLED;
 146         } else if (local_flags & LOCAL_ENABLE_USER) {
 147                 if(smb_pwent->smb_passwd == NULL) {
 148                         smb_pwent->smb_passwd = new_p16;
 149                         smb_pwent->smb_nt_passwd = new_nt_p16;
 150                 }
 151                 smb_pwent->acct_ctrl &= ~ACB_DISABLED;
 152         } else if (local_flags & LOCAL_SET_NO_PASSWORD) {
 153                 smb_pwent->acct_ctrl |= ACB_PWNOTREQ;
 154                 /* This is needed to preserve ACB_PWNOTREQ in mod_smbfilepwd_entry */
 155                 smb_pwent->smb_passwd = NULL;
 156                 smb_pwent->smb_nt_passwd = NULL;
 157         } else {
 158                 /*
 159                  * If we're dealing with setting a completely empty user account
 160                  * ie. One with a password of 'XXXX', but not set disabled (like
 161                  * an account created from scratch) then if the old password was
 162                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
 163                  * We remove that as we're giving this user their first password
 164                  * and the decision hasn't really been made to disable them (ie.
 165                  * don't create them disabled). JRA.
 166                  */
 167                 if((smb_pwent->smb_passwd == NULL) && (smb_pwent->acct_ctrl & ACB_DISABLED))
 168                         smb_pwent->acct_ctrl &= ~ACB_DISABLED;
 169                 smb_pwent->acct_ctrl &= ~ACB_PWNOTREQ;
 170                 smb_pwent->smb_passwd = new_p16;
 171                 smb_pwent->smb_nt_passwd = new_nt_p16;
 172         }
 173
 174         if(local_flags & LOCAL_DELETE_USER) {
 175                 if (del_smbpwd_entry(user_name)==False) {
 176                         slprintf(err_str,err_str_len-1, "Failed to delete entry for user %s.\n", user_name);
 177                         endsmbpwent(vp);
 178                         return False;
 179                 }
 180                 slprintf(msg_str, msg_str_len-1, "Deleted user %s.\n", user_name);
 181         } else {
 182                 if(mod_smbpwd_entry(smb_pwent,True) == False) {
 183                         slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n", user_name);
 184                         endsmbpwent(vp);
 185                         return False;
 186                 }
 187                 if(local_flags & LOCAL_DISABLE_USER)
 188                         slprintf(msg_str, msg_str_len-1, "Disabled user %s.\n", user_name);
 189                 else if (local_flags & LOCAL_ENABLE_USER)
 190                         slprintf(msg_str, msg_str_len-1, "Enabled user %s.\n", user_name);
 191                 else if (local_flags & LOCAL_SET_NO_PASSWORD)
 192                         slprintf(msg_str, msg_str_len-1, "User %s password set to none.\n", user_name);
 193         }
 194
 195         endsmbpwent(vp);
 196
 197         return True;
 198 }