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_misc.h"
  27 #include "librpc/gen_ndr/ndr_security.h"
  28 #include "lib/events/events.h"
  29 #include "lib/ldb/include/ldb.h"
  30 #include "lib/ldb/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
  45 char *samdb_relative_path(struct ldb_context *ldb,
  46                                  TALLOC_CTX *mem_ctx,
  47                                  const char *name)
  48 {
  49         const char *base_url =
  50                 (const char *)ldb_get_opaque(ldb, "ldb_url");
  51         char *path, *p, *full_name;
  52         if (name == NULL) {
  53                 return NULL;
  54         }
  55         if (name[0] == 0 || name[0] == '/' || strstr(name, ":/")) {
  56                 return talloc_strdup(mem_ctx, name);
  57         }
  58         path = talloc_strdup(mem_ctx, base_url);
  59         if (path == NULL) {
  60                 return NULL;
  61         }
  62         if ( (p = strrchr(path, '/')) != NULL) {
  63                 p[0] = '\0';
  64                 full_name = talloc_asprintf(mem_ctx, "%s/%s", path, name);
  65         } else {
  66                 full_name = talloc_asprintf(mem_ctx, "./%s", name);
  67         }
  68         talloc_free(path);
  69         return full_name;
  70 }
  71
  72 struct cli_credentials *samdb_credentials(TALLOC_CTX *mem_ctx,
  73                                           struct tevent_context *event_ctx,
  74                                           struct loadparm_context *lp_ctx)
  75 {
  76         struct cli_credentials *cred = cli_credentials_init(mem_ctx);
  77         if (!cred) {
  78                 return NULL;
  79         }
  80         cli_credentials_set_conf(cred, lp_ctx);
  81
  82         /* We don't want to use krb5 to talk to our samdb - recursion
  83          * here would be bad, and this account isn't in the KDC
  84          * anyway */
  85         cli_credentials_set_kerberos_state(cred, CRED_DONT_USE_KERBEROS);
  86
  87         if (!NT_STATUS_IS_OK(cli_credentials_set_secrets(cred, event_ctx, lp_ctx, NULL, NULL,
  88                                                          SECRETS_LDAP_FILTER))) {
  89                 /* Perfectly OK - if not against an LDAP backend */
  90                 return NULL;
  91         }
  92         return cred;
  93 }
  94
  95 /*
  96   connect to the SAM database
  97   return an opaque context pointer on success, or NULL on failure
  98  */
  99 struct ldb_context *samdb_connect(TALLOC_CTX *mem_ctx,
 100                                   struct tevent_context *ev_ctx,
 101                                   struct loadparm_context *lp_ctx,
 102                                   struct auth_session_info *session_info)
 103 {
 104         struct ldb_context *ldb;
 105         ldb = ldb_wrap_connect(mem_ctx, ev_ctx, lp_ctx,
 106                                lp_sam_url(lp_ctx), session_info,
 107                                samdb_credentials(mem_ctx, ev_ctx, lp_ctx),
 108                                0, NULL);
 109         if (!ldb) {
 110                 return NULL;
 111         }
 112         dsdb_make_schema_global(ldb);
 113         return ldb;
 114 }
 115
 116
 117 /****************************************************************************
 118  Create the SID list for this user.
 119 ****************************************************************************/
 120 NTSTATUS security_token_create(TALLOC_CTX *mem_ctx,
 121                                struct tevent_context *ev_ctx,
 122                                struct loadparm_context *lp_ctx,
 123                                struct dom_sid *user_sid,
 124                                struct dom_sid *group_sid,
 125                                int n_groupSIDs,
 126                                struct dom_sid **groupSIDs,
 127                                bool is_authenticated,
 128                                struct security_token **token)
 129 {
 130         struct security_token *ptoken;
 131         int i;
 132         NTSTATUS status;
 133
 134         ptoken = security_token_initialise(mem_ctx);
 135         NT_STATUS_HAVE_NO_MEMORY(ptoken);
 136
 137         ptoken->sids = talloc_array(ptoken, struct dom_sid *, n_groupSIDs + 5);
 138         NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
 139
 140         ptoken->user_sid = talloc_reference(ptoken, user_sid);
 141         ptoken->group_sid = talloc_reference(ptoken, group_sid);
 142         ptoken->privilege_mask = 0;
 143
 144         ptoken->sids[0] = ptoken->user_sid;
 145         ptoken->sids[1] = ptoken->group_sid;
 146
 147         /*
 148          * Finally add the "standard" SIDs.
 149          * The only difference between guest and "anonymous"
 150          * is the addition of Authenticated_Users.
 151          */
 152         ptoken->sids[2] = dom_sid_parse_talloc(ptoken->sids, SID_WORLD);
 153         NT_STATUS_HAVE_NO_MEMORY(ptoken->sids[2]);
 154         ptoken->sids[3] = dom_sid_parse_talloc(ptoken->sids, SID_NT_NETWORK);
 155         NT_STATUS_HAVE_NO_MEMORY(ptoken->sids[3]);
 156         ptoken->num_sids = 4;
 157
 158         if (is_authenticated) {
 159                 ptoken->sids[4] = dom_sid_parse_talloc(ptoken->sids, SID_NT_AUTHENTICATED_USERS);
 160                 NT_STATUS_HAVE_NO_MEMORY(ptoken->sids[4]);
 161                 ptoken->num_sids++;
 162         }
 163
 164         for (i = 0; i < n_groupSIDs; i++) {
 165                 size_t check_sid_idx;
 166                 for (check_sid_idx = 1;
 167                      check_sid_idx < ptoken->num_sids;
 168                      check_sid_idx++) {
 169                         if (dom_sid_equal(ptoken->sids[check_sid_idx], groupSIDs[i])) {
 170                                 break;
 171                         }
 172                 }
 173
 174                 if (check_sid_idx == ptoken->num_sids) {
 175                         ptoken->sids[ptoken->num_sids++] = talloc_reference(ptoken->sids, groupSIDs[i]);
 176                 }
 177         }
 178
 179         /* setup the privilege mask for this token */
 180         status = samdb_privilege_setup(ev_ctx, lp_ctx, ptoken);
 181         if (!NT_STATUS_IS_OK(status)) {
 182                 talloc_free(ptoken);
 183                 return status;
 184         }
 185
 186         security_token_debug(10, ptoken);
 187
 188         *token = ptoken;
 189
 190         return NT_STATUS_OK;
 191 }