source4/dsdb/samdb/samdb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    interface functions for the sam database
   5
   6    Copyright (C) Andrew Tridgell 2004
   7    Copyright (C) Volker Lendecke 2004
   8    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2006
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "librpc/gen_ndr/ndr_netlogon.h"
  26 #include "librpc/gen_ndr/ndr_security.h"
  27 #include "lib/events/events.h"
  28 #include "lib/ldb-samba/ldb_wrap.h"
  29 #include <ldb.h>
  30 #include <ldb_errors.h>
  31 #include "libcli/security/security.h"
  32 #include "libcli/auth/libcli_auth.h"
  33 #include "libcli/ldap/ldap_ndr.h"
  34 #include "system/time.h"
  35 #include "system/filesys.h"
  36 #include "ldb_wrap.h"
  37 #include "../lib/util/util_ldb.h"
  38 #include "dsdb/samdb/samdb.h"
  39 #include "../libds/common/flags.h"
  40 #include "param/param.h"
  41 #include "lib/events/events.h"
  42 #include "auth/credentials/credentials.h"
  43 #include "param/secrets.h"
  44 #include "auth/auth.h"
  45
  46 /*
  47   connect to the SAM database specified by URL
  48   return an opaque context pointer on success, or NULL on failure
  49  */
  50 struct ldb_context *samdb_connect_url(TALLOC_CTX *mem_ctx,
  51                                   struct tevent_context *ev_ctx,
  52                                   struct loadparm_context *lp_ctx,
  53                                   struct auth_session_info *session_info,
  54                                   unsigned int flags, const char *url)
  55 {
  56         struct ldb_context *ldb;
  57         struct dsdb_schema *schema;
  58         int ret;
  59
  60         ldb = ldb_wrap_find(url, ev_ctx, lp_ctx, session_info, NULL, flags);
  61         if (ldb != NULL)
  62                 return talloc_reference(mem_ctx, ldb);
  63
  64         ldb = samba_ldb_init(mem_ctx, ev_ctx, lp_ctx, session_info, NULL);
  65
  66         if (ldb == NULL)
  67                 return NULL;
  68
  69         dsdb_set_global_schema(ldb);
  70
  71         ret = samba_ldb_connect(ldb, lp_ctx, url, flags);
  72         if (ret != LDB_SUCCESS) {
  73                 talloc_free(ldb);
  74                 return NULL;
  75         }
  76
  77         schema = dsdb_get_schema(ldb, NULL);
  78         /* make the resulting schema global */
  79         if (schema) {
  80                 dsdb_make_schema_global(ldb, schema);
  81         }
  82
  83         if (!ldb_wrap_add(url, ev_ctx, lp_ctx, session_info, NULL, flags, ldb)) {
  84                 talloc_free(ldb);
  85                 return NULL;
  86         }
  87
  88         return ldb;
  89 }
  90
  91
  92 /*
  93   connect to the SAM database
  94   return an opaque context pointer on success, or NULL on failure
  95  */
  96 struct ldb_context *samdb_connect(TALLOC_CTX *mem_ctx,
  97                                   struct tevent_context *ev_ctx,
  98                                   struct loadparm_context *lp_ctx,
  99                                   struct auth_session_info *session_info,
 100                                   unsigned int flags)
 101 {
 102         return samdb_connect_url(mem_ctx, ev_ctx, lp_ctx, session_info, flags, "sam.ldb");
 103 }
 104
 105 /****************************************************************************
 106  Create the SID list for this user.
 107 ****************************************************************************/
 108 NTSTATUS security_token_create(TALLOC_CTX *mem_ctx,
 109                                struct loadparm_context *lp_ctx,
 110                                unsigned int num_sids,
 111                                struct dom_sid *sids,
 112                                uint32_t session_info_flags,
 113                                struct security_token **token)
 114 {
 115         struct security_token *ptoken;
 116         unsigned int i;
 117         NTSTATUS status;
 118
 119         ptoken = security_token_initialise(mem_ctx);
 120         NT_STATUS_HAVE_NO_MEMORY(ptoken);
 121
 122         ptoken->sids = talloc_array(ptoken, struct dom_sid, num_sids + 6 /* over-allocate */);
 123         NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
 124
 125         ptoken->num_sids = 0;
 126
 127         for (i = 0; i < num_sids; i++) {
 128                 size_t check_sid_idx;
 129                 for (check_sid_idx = 0;
 130                      check_sid_idx < ptoken->num_sids;
 131                      check_sid_idx++) {
 132                         if (dom_sid_equal(&ptoken->sids[check_sid_idx], &sids[i])) {
 133                                 break;
 134                         }
 135                 }
 136
 137                 if (check_sid_idx == ptoken->num_sids) {
 138                         ptoken->sids = talloc_realloc(ptoken, ptoken->sids, struct dom_sid, ptoken->num_sids + 1);
 139                         NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
 140
 141                         ptoken->sids[ptoken->num_sids] = sids[i];
 142                         ptoken->num_sids++;
 143                 }
 144         }
 145
 146         /* The caller may have requested simple privilages, for example if there isn't a local DB */
 147         if (session_info_flags & AUTH_SESSION_INFO_SIMPLE_PRIVILEGES) {
 148                 /* Shortcuts to prevent recursion and avoid lookups */
 149                 if (ptoken->sids == NULL) {
 150                         ptoken->privilege_mask = 0;
 151                 } else if (security_token_is_system(ptoken)) {
 152                         ptoken->privilege_mask = ~0;
 153                 } else if (security_token_is_anonymous(ptoken)) {
 154                         ptoken->privilege_mask = 0;
 155                 } else if (security_token_has_builtin_administrators(ptoken)) {
 156                         ptoken->privilege_mask = ~0;
 157                 } else {
 158                         /* All other 'users' get a empty priv set so far */
 159                         ptoken->privilege_mask = 0;
 160                 }
 161         } else {
 162                 /* setup the privilege mask for this token */
 163                 status = samdb_privilege_setup(lp_ctx, ptoken);
 164                 if (!NT_STATUS_IS_OK(status)) {
 165                         talloc_free(ptoken);
 166                         DEBUG(1,("Unable to access privileges database\n"));
 167                         return status;
 168                 }
 169         }
 170
 171         security_token_debug(0, 10, ptoken);
 172
 173         *token = ptoken;
 174
 175         return NT_STATUS_OK;
 176 }