source3/smbd/auth_unix.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 2.2
   4    Password and authentication handling
   5    Copyright (C) Andrew Bartlett              2001
   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 update the encrypted smbpasswd file from the plaintext username and password
  26
  27 this ugly hack needs to die, but not quite yet...
  28 *****************************************************************************/
  29 static BOOL update_smbpassword_file(char *user, char *password)
  30 {
  31         SAM_ACCOUNT     *sampass = NULL;
  32         BOOL            ret;
  33
  34         pdb_init_sam(&sampass);
  35
  36         become_root();
  37         ret = pdb_getsampwnam(sampass, user);
  38         unbecome_root();
  39
  40         if(ret == False) {
  41                 DEBUG(0,("pdb_getsampwnam returned NULL\n"));
  42                 pdb_free_sam(&sampass);
  43                 return False;
  44         }
  45
  46         /*
  47          * Remove the account disabled flag - we are updating the
  48          * users password from a login.
  49          */
  50         if (!pdb_set_acct_ctrl(sampass, pdb_get_acct_ctrl(sampass) & ~ACB_DISABLED)) {
  51                 pdb_free_sam(&sampass);
  52                 return False;
  53         }
  54
  55         if (!pdb_set_plaintext_passwd (sampass, password)) {
  56                 pdb_free_sam(&sampass);
  57                 return False;
  58         }
  59
  60         /* Now write it into the file. */
  61         become_root();
  62
  63         /* Here, the override flag is True, because we want to ignore the
  64            XXXXXXX'd out password */
  65         ret = pdb_update_sam_account (sampass, True);
  66
  67         unbecome_root();
  68
  69         if (ret) {
  70                 DEBUG(3,("pdb_update_sam_account returned %d\n",ret));
  71         }
  72
  73         memset(password, '\0', strlen(password));
  74
  75         pdb_free_sam(&sampass);
  76         return ret;
  77 }
  78
  79
  80 /****************************************************************************
  81 check if a username/password is OK assuming the password
  82 in PLAIN TEXT
  83 ****************************************************************************/
  84
  85 NTSTATUS check_unix_security(void *my_private_data,
  86                              const auth_usersupplied_info *user_info,
  87                              const auth_authsupplied_info *auth_info,
  88                              auth_serversupplied_info **server_info)
  89 {
  90         NTSTATUS nt_status;
  91         struct passwd *pass = NULL;
  92
  93         become_root();
  94         pass = Get_Pwnam(user_info->internal_username.str);
  95
  96         nt_status = pass_check(pass,
  97                                 pass ? pass->pw_name : user_info->internal_username.str,
  98                                 (char *)user_info->plaintext_password.data,
  99                                 user_info->plaintext_password.length-1,
 100                                 lp_update_encrypted() ?
 101                                 update_smbpassword_file : NULL,
 102                                 True);
 103
 104         unbecome_root();
 105
 106         if NT_STATUS_IS_OK(nt_status) {
 107                 if (pass) {
 108                         make_server_info_pw(server_info, pass);
 109                 } else {
 110                         /* we need to do somthing more useful here */
 111                         nt_status = NT_STATUS_NO_SUCH_USER;
 112                 }
 113         }
 114
 115         return nt_status;
 116 }
 117
 118 BOOL auth_init_unix(auth_methods **auth_method)
 119 {
 120         if (!make_auth_methods(auth_method)) {
 121                 return False;
 122         }
 123         (*auth_method)->auth = check_unix_security;
 124         return True;
 125 }