source4/dsdb/samdb/ldb_modules/samba_secrets.c

   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 "lib/ldb/include/ldb.h"
  34 #include "lib/ldb/include/ldb_errors.h"
  35 #include "lib/ldb/include/ldb_module.h"
  36 #include "lib/ldb/include/ldb_private.h"
  37
  38 #include "dsdb/samdb/ldb_modules/util.h"
  39 #include "dsdb/samdb/samdb.h"
  40
  41
  42 static int samba_secrets_init(struct ldb_module *module)
  43 {
  44         struct ldb_context *ldb = ldb_module_get_ctx(module);
  45         int ret, len, i;
  46         TALLOC_CTX *tmp_ctx = talloc_new(module);
  47         struct ldb_module *backend_module, *module_chain;
  48         const char **reverse_module_list;
  49         /*
  50           Add modules to the list to activate them by default
  51           beware often order is important
  52
  53           The list is presented here as a set of declarations to show the
  54           stack visually
  55         */
  56         static const char *modules_list[] = {"update_keytab",
  57                                              "objectguid",
  58                                              "rdn_name",
  59                                              NULL };
  60
  61         if (!tmp_ctx) {
  62                 ldb_oom(ldb);
  63                 return LDB_ERR_OPERATIONS_ERROR;
  64         }
  65
  66         /* Now prepare the module chain.  Oddly, we must give it to ldb_load_modules_list in REVERSE */
  67         for (len = 0; modules_list[len]; len++) { /* noop */};
  68
  69         reverse_module_list = talloc_array(tmp_ctx, const char *, len+1);
  70         if (!reverse_module_list) {
  71                 talloc_free(tmp_ctx);
  72                 ldb_oom(ldb);
  73                 return LDB_ERR_OPERATIONS_ERROR;
  74         }
  75         for (i=0; i < len; i++) {
  76                 reverse_module_list[i] = modules_list[(len - 1) - i];
  77         }
  78         reverse_module_list[i] = NULL;
  79
  80         /* The backend (at least until the partitions module
  81          * reconfigures things) is the next module in the currently
  82          * loaded chain */
  83         backend_module = module->next;
  84         ret = ldb_load_modules_list(ldb, reverse_module_list, backend_module, &module_chain);
  85         if (ret != LDB_SUCCESS) {
  86                 talloc_free(tmp_ctx);
  87                 return ret;
  88         }
  89
  90         talloc_free(tmp_ctx);
  91         /* Set this as the 'next' module, so that we effectivly append it to module chain */
  92         module->next = module_chain;
  93
  94         return ldb_next_init(module);
  95 }
  96
  97 _PUBLIC_ const struct ldb_module_ops ldb_samba_secrets_module_ops = {
  98         .name              = "samba_secrets",
  99         .init_context      = samba_secrets_init,
 100 };