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 static BOOL add_new_user(char *user_name, uid_t uid, BOOL trust_account,
  29                          BOOL disable_user, BOOL set_no_password,
  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.acct_ctrl = (trust_account ? ACB_WSTRUST : ACB_NORMAL);
  40
  41         if(disable_user) {
  42                 new_smb_pwent.acct_ctrl |= ACB_DISABLED;
  43         } else if (set_no_password) {
  44                 new_smb_pwent.acct_ctrl |= ACB_PWNOTREQ;
  45         } else {
  46                 new_smb_pwent.smb_passwd = new_p16;
  47                 new_smb_pwent.smb_nt_passwd = new_nt_p16;
  48         }
  49
  50         return add_smbpwd_entry(&new_smb_pwent);
  51 }
  52
  53
  54 /*************************************************************
  55 change a password entry in the local smbpasswd file
  56 *************************************************************/
  57
  58 BOOL local_password_change(char *user_name, BOOL trust_account, BOOL add_user,
  59                            BOOL enable_user, BOOL disable_user, BOOL set_no_password,
  60                            char *new_passwd,
  61                            char *err_str, size_t err_str_len,
  62                            char *msg_str, size_t msg_str_len)
  63 {
  64         struct passwd  *pwd;
  65         void *vp;
  66         struct smb_passwd *smb_pwent;
  67         uchar           new_p16[16];
  68         uchar           new_nt_p16[16];
  69
  70         *err_str = '\0';
  71         *msg_str = '\0';
  72
  73         pwd = sys_getpwnam(user_name);
  74
  75         /*
  76          * Check for a local account.
  77          */
  78
  79         if(!pwd) {
  80                 slprintf(err_str, err_str_len - 1, "User %s does not \
  81 exist in system password file (usually /etc/passwd). Cannot add \
  82 account without a valid local system user.\n", user_name);
  83                 return False;
  84         }
  85
  86         /* Calculate the MD4 hash (NT compatible) of the new password. */
  87         nt_lm_owf_gen(new_passwd, new_nt_p16, new_p16);
  88
  89         /*
  90          * Open the smbpaswd file.
  91          */
  92         vp = startsmbpwent(True);
  93         if (!vp && errno == ENOENT) {
  94                 FILE *fp;
  95                 slprintf(msg_str,msg_str_len-1,
  96                         "smbpasswd file did not exist - attempting to create it.\n");
  97                 fp = sys_fopen(lp_smb_passwd_file(), "w");
  98                 if (fp) {
  99                         fprintf(fp, "# Samba SMB password file\n");
 100                         fclose(fp);
 101                         vp = startsmbpwent(True);
 102                 }
 103         }
 104
 105         if (!vp) {
 106                 slprintf(err_str, err_str_len-1, "Cannot open file %s. Error was %s\n",
 107                         lp_smb_passwd_file(), strerror(errno) );
 108                 return False;
 109         }
 110
 111         /* Get the smb passwd entry for this user */
 112         smb_pwent = getsmbpwnam(user_name);
 113         if (smb_pwent == NULL) {
 114                 if(add_user == False) {
 115                         slprintf(err_str, err_str_len-1,
 116                                 "Failed to find entry for user %s.\n", pwd->pw_name);
 117                         endsmbpwent(vp);
 118                         return False;
 119                 }
 120
 121                 if (add_new_user(user_name, pwd->pw_uid, trust_account, disable_user,
 122                                  set_no_password, new_p16, new_nt_p16)) {
 123                         slprintf(msg_str, msg_str_len-1, "Added user %s.\n", user_name);
 124                         endsmbpwent(vp);
 125                         return True;
 126                 } else {
 127                         slprintf(err_str, err_str_len-1, "Failed to add entry for user %s.\n", user_name);
 128                         endsmbpwent(vp);
 129                         return False;
 130                 }
 131         } else {
 132                 /* the entry already existed */
 133                 add_user = False;
 134         }
 135
 136         /*
 137          * We are root - just write the new password
 138          * and the valid last change time.
 139          */
 140
 141         if(disable_user) {
 142                 smb_pwent->acct_ctrl |= ACB_DISABLED;
 143         } else if (enable_user) {
 144                 if(smb_pwent->smb_passwd == NULL) {
 145                         smb_pwent->smb_passwd = new_p16;
 146                         smb_pwent->smb_nt_passwd = new_nt_p16;
 147                 }
 148                 smb_pwent->acct_ctrl &= ~ACB_DISABLED;
 149         } else if (set_no_password) {
 150                 smb_pwent->acct_ctrl |= ACB_PWNOTREQ;
 151                 /* This is needed to preserve ACB_PWNOTREQ in mod_smbfilepwd_entry */
 152                 smb_pwent->smb_passwd = NULL;
 153                 smb_pwent->smb_nt_passwd = NULL;
 154         } else {
 155                 /*
 156                  * If we're dealing with setting a completely empty user account
 157                  * ie. One with a password of 'XXXX', but not set disabled (like
 158                  * an account created from scratch) then if the old password was
 159                  * 'XX's then getsmbpwent will have set the ACB_DISABLED flag.
 160                  * We remove that as we're giving this user their first password
 161                  * and the decision hasn't really been made to disable them (ie.
 162                  * don't create them disabled). JRA.
 163                  */
 164                 if((smb_pwent->smb_passwd == NULL) && (smb_pwent->acct_ctrl & ACB_DISABLED))
 165                         smb_pwent->acct_ctrl &= ~ACB_DISABLED;
 166                 smb_pwent->acct_ctrl &= ~ACB_PWNOTREQ;
 167                 smb_pwent->smb_passwd = new_p16;
 168                 smb_pwent->smb_nt_passwd = new_nt_p16;
 169         }
 170
 171         if(mod_smbpwd_entry(smb_pwent,True) == False) {
 172                 slprintf(err_str, err_str_len-1, "Failed to modify entry for user %s.\n",
 173                         pwd->pw_name);
 174                 endsmbpwent(vp);
 175                 return False;
 176         }
 177
 178         endsmbpwent(vp);
 179
 180         return True;
 181 }