Line data    Source code

       1             : /* 
       2             :    Samba4 module loading module (for secrets)
       3             : 
       4             :    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2009
       5             : 
       6             :    This program is free software; you can redistribute it and/or modify
       7             :    it under the terms of the GNU General Public License as published by
       8             :    the Free Software Foundation; either version 3 of the License, or
       9             :    (at your option) any later version.
      10             :    
      11             :    This program is distributed in the hope that it will be useful,
      12             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14             :    GNU General Public License for more details.
      15             :    
      16             :    You should have received a copy of the GNU General Public License
      17             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.
      18             : */
      19             : 
      20             : /*
      21             :  *  Name: ldb
      22             :  *
      23             :  *  Component: Samba4 module loading module (for secrets.ldb)
      24             :  *
      25             :  *  Description: Implement a single 'module' in the secrets.ldb database
      26             :  *
      27             :  *  This is to avoid forcing a reprovision of the ldb databases when we change the internal structure of the code
      28             :  *
      29             :  *  Author: Andrew Bartlett
      30             :  */
      31             : 
      32             : #include "includes.h"
      33             : #include <ldb.h>
      34             : #include <ldb_errors.h>
      35             : #include <ldb_module.h>
      36             : #include "dsdb/samdb/ldb_modules/util.h"
      37             : #include "dsdb/samdb/samdb.h"
      38             : 
      39             : 
      40       43095 : static int samba_secrets_init(struct ldb_module *module)
      41             : {
      42       43095 :         struct ldb_context *ldb = ldb_module_get_ctx(module);
      43             :         int ret, len, i;
      44       43095 :         TALLOC_CTX *tmp_ctx = talloc_new(module);
      45             :         struct ldb_module *backend_module, *module_chain;
      46             :         const char **reverse_module_list;
      47             :         /*
      48             :           Add modules to the list to activate them by default
      49             :           beware often order is important
      50             :           
      51             :           The list is presented here as a set of declarations to show the
      52             :           stack visually
      53             :         */
      54             :         static const char *modules_list[] = {"update_keytab",
      55             :                                              "secrets_tdb_sync",
      56             :                                              "objectguid",
      57             :                                              "rdn_name",
      58             :                                              NULL };
      59             : 
      60       43095 :         if (!tmp_ctx) {
      61           0 :                 return ldb_oom(ldb);
      62             :         }
      63             : 
      64             :         /* Now prepare the module chain.  Oddly, we must give it to ldb_load_modules_list in REVERSE */
      65       79699 :         for (len = 0; modules_list[len]; len++) { /* noop */};
      66             : 
      67       43095 :         reverse_module_list = talloc_array(tmp_ctx, const char *, len+1);
      68       43095 :         if (!reverse_module_list) {
      69           0 :                 talloc_free(tmp_ctx);
      70           0 :                 return ldb_oom(ldb);
      71             :         }
      72      215475 :         for (i=0; i < len; i++) {
      73      172380 :                 reverse_module_list[i] = modules_list[(len - 1) - i];
      74             :         }
      75       43095 :         reverse_module_list[i] = NULL;
      76             : 
      77             :         /* The backend (at least until the partitions module
      78             :          * reconfigures things) is the next module in the currently
      79             :          * loaded chain */
      80       43095 :         backend_module = ldb_module_next(module);
      81       43095 :         ret = ldb_module_load_list(ldb, reverse_module_list, backend_module, &module_chain);
      82       43095 :         if (ret != LDB_SUCCESS) {
      83           0 :                 talloc_free(tmp_ctx);
      84           0 :                 return ret;
      85             :         }
      86             : 
      87       43095 :         talloc_free(tmp_ctx);
      88             :         /* Set this as the 'next' module, so that we effectivly append it to module chain */
      89       43095 :         ldb_module_set_next(module, module_chain);
      90             : 
      91       43095 :         return ldb_next_init(module);
      92             : }
      93             : 
      94             : static const struct ldb_module_ops ldb_samba_secrets_module_ops = {
      95             :         .name              = "samba_secrets",
      96             :         .init_context      = samba_secrets_init,
      97             : };
      98             : 
      99        4310 : int ldb_samba_secrets_module_init(const char *version)
     100             : {
     101        4310 :         LDB_MODULE_CHECK_VERSION(version);
     102        4310 :         return ldb_register_module(&ldb_samba_secrets_module_ops);
     103             : }