source/passdb/pdb_guest.c

   1 /*
   2  * 'Guest' password backend for samba
   3  * Copyright (C) Jelmer Vernooij 2002
   4  * Copyright (C) Andrew Bartlett 2003
   5  *
   6  * This program is free software; you can redistribute it and/or modify it under
   7  * the terms of the GNU General Public License as published by the Free
   8  * Software Foundation; either version 2 of the License, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * this program; if not, write to the Free Software Foundation, Inc., 675
  18  * Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 #include "includes.h"
  22
  23 /******************************************************************
  24   Lookup a name in the SAM database
  25  ******************************************************************/
  26
  27 static NTSTATUS guestsam_getsampwnam (struct pdb_methods *methods, SAM_ACCOUNT *sam_account, const char *sname)
  28 {
  29         const char *guest_account = lp_guestaccount();
  30
  31         if (!sam_account || !sname) {
  32                 DEBUG(0,("invalid name specified"));
  33                 return NT_STATUS_UNSUCCESSFUL;
  34         }
  35
  36         if (!(guest_account && *guest_account)) {
  37                 DEBUG(1, ("NULL guest account!?!?\n"));
  38                 return NT_STATUS_UNSUCCESSFUL;
  39         }
  40
  41         if (!methods) {
  42                 DEBUG(0,("invalid methods\n"));
  43                 return NT_STATUS_UNSUCCESSFUL;
  44         }
  45         if (!strequal(guest_account, sname)) {
  46                 return NT_STATUS_NO_SUCH_USER;
  47         }
  48
  49         pdb_fill_default_sam(sam_account);
  50
  51         if (!pdb_set_username(sam_account, guest_account, PDB_SET))
  52                 return NT_STATUS_UNSUCCESSFUL;
  53
  54         if (!pdb_set_fullname(sam_account, guest_account, PDB_SET))
  55                 return NT_STATUS_UNSUCCESSFUL;
  56
  57         if (!pdb_set_domain(sam_account, get_global_sam_name(), PDB_DEFAULT))
  58                 return NT_STATUS_UNSUCCESSFUL;
  59
  60         if (!pdb_set_acct_ctrl(sam_account, ACB_NORMAL, PDB_DEFAULT))
  61                 return NT_STATUS_UNSUCCESSFUL;
  62
  63         if (!pdb_set_user_sid_from_rid(sam_account, DOMAIN_USER_RID_GUEST, PDB_DEFAULT))
  64                 return NT_STATUS_UNSUCCESSFUL;
  65
  66         if (!pdb_set_group_sid_from_rid(sam_account, DOMAIN_GROUP_RID_GUESTS, PDB_DEFAULT))
  67                 return NT_STATUS_UNSUCCESSFUL;
  68
  69         return NT_STATUS_OK;
  70 }
  71
  72
  73 /***************************************************************************
  74   Search by rid
  75  **************************************************************************/
  76
  77 static NTSTATUS guestsam_getsampwrid (struct pdb_methods *methods,
  78                                  SAM_ACCOUNT *sam_account, uint32 rid)
  79 {
  80         if (rid != DOMAIN_USER_RID_GUEST) {
  81                 return NT_STATUS_NO_SUCH_USER;
  82         }
  83
  84         if (!sam_account) {
  85                 return NT_STATUS_INVALID_PARAMETER;
  86         }
  87
  88         return guestsam_getsampwnam (methods, sam_account, lp_guestaccount());
  89 }
  90
  91 static NTSTATUS guestsam_getsampwsid(struct pdb_methods *my_methods, SAM_ACCOUNT * user, const DOM_SID *sid)
  92 {
  93         uint32 rid;
  94         if (!sid_peek_check_rid(get_global_sam_sid(), sid, &rid))
  95                 return NT_STATUS_NO_SUCH_USER;
  96
  97         return guestsam_getsampwrid(my_methods, user, rid);
  98 }
  99
 100
 101 /***************************************************************************
 102   Updates a SAM_ACCOUNT
 103
 104   This isn't a particulary practical option for pdb_guest.  We certainly don't
 105   want to twidde the filesystem, so what should we do?
 106
 107   Current plan is to transparently add the account.  It should appear
 108   as if the pdb_guest version was modified, but its actually stored somehwere.
 109  ****************************************************************************/
 110
 111 static NTSTATUS guestsam_update_sam_account (struct pdb_methods *methods, SAM_ACCOUNT *newpwd)
 112 {
 113         return methods->parent->pdb_add_sam_account(methods->parent, newpwd);
 114 }
 115
 116 NTSTATUS pdb_init_guestsam(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_method, const char *location)
 117 {
 118         NTSTATUS nt_status;
 119
 120         if (!pdb_context) {
 121                 DEBUG(0, ("invalid pdb_context specified\n"));
 122                 return NT_STATUS_UNSUCCESSFUL;
 123         }
 124
 125         if (!NT_STATUS_IS_OK(nt_status = make_pdb_methods(pdb_context->mem_ctx, pdb_method))) {
 126                 return nt_status;
 127         }
 128
 129         (*pdb_method)->name = "guestsam";
 130
 131         (*pdb_method)->getsampwnam = guestsam_getsampwnam;
 132         (*pdb_method)->getsampwsid = guestsam_getsampwsid;
 133         (*pdb_method)->update_sam_account = guestsam_update_sam_account;
 134
 135         /* we should do no group mapping here */
 136         (*pdb_method)->getgrsid = pdb_nop_getgrsid;
 137         (*pdb_method)->getgrgid = pdb_nop_getgrgid;
 138         (*pdb_method)->getgrnam = pdb_nop_getgrnam;
 139         (*pdb_method)->add_group_mapping_entry = pdb_nop_add_group_mapping_entry;
 140         (*pdb_method)->update_group_mapping_entry = pdb_nop_update_group_mapping_entry;
 141         (*pdb_method)->delete_group_mapping_entry = pdb_nop_delete_group_mapping_entry;
 142         (*pdb_method)->enum_group_mapping = pdb_nop_enum_group_mapping;
 143
 144
 145         /* There's not very much to initialise here */
 146         return NT_STATUS_OK;
 147 }
 148
 149 NTSTATUS pdb_guest_init(void)
 150 {
 151         return smb_register_passdb(PASSDB_INTERFACE_VERSION, "guest", pdb_init_guestsam);
 152 }
 153