source3/passdb/pdb_secrets.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Copyright (C) Andrew Tridgell 1992-2001
   4    Copyright (C) Andrew Bartlett      2002
   5    Copyright (C) Rafal Szczesniak     2002
   6    Copyright (C) Tim Potter           2001
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 /* the Samba secrets database stores any generated, private information
  23    such as the local SID and machine trust password */
  24
  25 #include "includes.h"
  26 #include "passdb.h"
  27 #include "passdb/pdb_secrets.h"
  28 #include "librpc/gen_ndr/ndr_secrets.h"
  29 #include "secrets.h"
  30 #include "dbwrap/dbwrap.h"
  31 #include "dbwrap/dbwrap_open.h"
  32 #include "../libcli/security/security.h"
  33 #include "util_tdb.h"
  34
  35 #undef DBGC_CLASS
  36 #define DBGC_CLASS DBGC_PASSDB
  37
  38 /**
  39  * Get trusted domains info from secrets.tdb.
  40  **/
  41
  42 struct list_trusted_domains_state {
  43         uint32 num_domains;
  44         struct trustdom_info **domains;
  45 };
  46
  47 static int list_trusted_domain(struct db_record *rec, void *private_data)
  48 {
  49         const size_t prefix_len = strlen(SECRETS_DOMTRUST_ACCT_PASS);
  50         struct TRUSTED_DOM_PASS pass;
  51         enum ndr_err_code ndr_err;
  52         DATA_BLOB blob;
  53         struct trustdom_info *dom_info;
  54         TDB_DATA key;
  55         TDB_DATA value;
  56
  57         struct list_trusted_domains_state *state =
  58                 (struct list_trusted_domains_state *)private_data;
  59
  60         key = dbwrap_record_get_key(rec);
  61         value = dbwrap_record_get_value(rec);
  62
  63         if ((key.dsize < prefix_len)
  64             || (strncmp((char *)key.dptr, SECRETS_DOMTRUST_ACCT_PASS,
  65                         prefix_len) != 0)) {
  66                 return 0;
  67         }
  68
  69         blob = data_blob_const(value.dptr, value.dsize);
  70
  71         ndr_err = ndr_pull_struct_blob(&blob, talloc_tos(), &pass,
  72                         (ndr_pull_flags_fn_t)ndr_pull_TRUSTED_DOM_PASS);
  73         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
  74                 return false;
  75         }
  76
  77         if (pass.domain_sid.num_auths != 4) {
  78                 DEBUG(0, ("SID %s is not a domain sid, has %d "
  79                           "auths instead of 4\n",
  80                           sid_string_dbg(&pass.domain_sid),
  81                           pass.domain_sid.num_auths));
  82                 return 0;
  83         }
  84
  85         if (!(dom_info = talloc(state->domains, struct trustdom_info))) {
  86                 DEBUG(0, ("talloc failed\n"));
  87                 return 0;
  88         }
  89
  90         dom_info->name = talloc_strdup(dom_info, pass.uni_name);
  91         if (!dom_info->name) {
  92                 TALLOC_FREE(dom_info);
  93                 return 0;
  94         }
  95
  96         sid_copy(&dom_info->sid, &pass.domain_sid);
  97
  98         ADD_TO_ARRAY(state->domains, struct trustdom_info *, dom_info,
  99                      &state->domains, &state->num_domains);
 100
 101         if (state->domains == NULL) {
 102                 state->num_domains = 0;
 103                 return -1;
 104         }
 105         return 0;
 106 }
 107
 108 NTSTATUS secrets_trusted_domains(TALLOC_CTX *mem_ctx, uint32 *num_domains,
 109                                  struct trustdom_info ***domains)
 110 {
 111         struct list_trusted_domains_state state;
 112         struct db_context *db_ctx;
 113
 114         if (!secrets_init()) {
 115                 return NT_STATUS_ACCESS_DENIED;
 116         }
 117
 118         db_ctx = secrets_db_ctx();
 119
 120         state.num_domains = 0;
 121
 122         /*
 123          * Make sure that a talloc context for the trustdom_info structs
 124          * exists
 125          */
 126
 127         if (!(state.domains = talloc_array(
 128                       mem_ctx, struct trustdom_info *, 1))) {
 129                 return NT_STATUS_NO_MEMORY;
 130         }
 131
 132         dbwrap_traverse_read(db_ctx, list_trusted_domain, (void *)&state, NULL);
 133
 134         *num_domains = state.num_domains;
 135         *domains = state.domains;
 136         return NT_STATUS_OK;
 137 }