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 "util/util_ldb.h"
  38 #include "dsdb/samdb/samdb.h"
  39 #include "dsdb/common/flags.h"
  40 #include "param/param.h"
  41 #include "lib/events/events.h"
  42
  43 char *samdb_relative_path(struct ldb_context *ldb,
  44                                  TALLOC_CTX *mem_ctx,
  45                                  const char *name)
  46 {
  47         const char *base_url =
  48                 (const char *)ldb_get_opaque(ldb, "ldb_url");
  49         char *path, *p, *full_name;
  50         if (name == NULL) {
  51                 return NULL;
  52         }
  53         if (name[0] == 0 || name[0] == '/' || strstr(name, ":/")) {
  54                 return talloc_strdup(mem_ctx, name);
  55         }
  56         path = talloc_strdup(mem_ctx, base_url);
  57         if (path == NULL) {
  58                 return NULL;
  59         }
  60         if ( (p = strrchr(path, '/')) != NULL) {
  61                 p[0] = '\0';
  62                 full_name = talloc_asprintf(mem_ctx, "%s/%s", path, name);
  63         } else {
  64                 full_name = talloc_asprintf(mem_ctx, "./%s", name);
  65         }
  66         talloc_free(path);
  67         return full_name;
  68 }
  69
  70
  71 /*
  72   connect to the SAM database
  73   return an opaque context pointer on success, or NULL on failure
  74  */
  75 struct ldb_context *samdb_connect(TALLOC_CTX *mem_ctx,
  76                                   struct event_context *ev_ctx,
  77                                   struct loadparm_context *lp_ctx,
  78                                   struct auth_session_info *session_info)
  79 {
  80         struct ldb_context *ldb;
  81         ldb = ldb_wrap_connect(mem_ctx, ev_ctx, lp_ctx,
  82                                lp_sam_url(lp_ctx), session_info,
  83                                NULL, 0, NULL);
  84         if (!ldb) {
  85                 return NULL;
  86         }
  87         dsdb_make_schema_global(ldb);
  88         return ldb;
  89 }
  90
  91 /*
  92   copy from a template record to a message
  93 */
  94 int samdb_copy_template(struct ldb_context *ldb,
  95                         struct ldb_message *msg, const char *name,
  96                         const char **errstring)
  97 {
  98         struct ldb_result *res;
  99         struct ldb_message *t;
 100         int ret, i, j;
 101         struct ldb_context *templates_ldb;
 102         char *templates_ldb_path;
 103         struct ldb_dn *basedn;
 104         struct event_context *event_ctx;
 105         struct loadparm_context *lp_ctx;
 106
 107         templates_ldb = talloc_get_type(ldb_get_opaque(ldb, "templates_ldb"), struct ldb_context);
 108
 109         if (!templates_ldb) {
 110                 templates_ldb_path = samdb_relative_path(ldb,
 111                                                          msg,
 112                                                          "templates.ldb");
 113                 if (!templates_ldb_path) {
 114                         *errstring = talloc_asprintf(msg, "samdb_copy_template: ERROR: Failed to contruct path for template db");
 115                         return LDB_ERR_OPERATIONS_ERROR;
 116                 }
 117
 118                 event_ctx = ldb_get_event_context(ldb);
 119                 lp_ctx = (struct loadparm_context *)ldb_get_opaque(ldb, "loadparm");
 120
 121                 /* FIXME: need to remove this wehn we finally pass the event
 122                  * context around in ldb */
 123                 if (event_ctx == NULL) {
 124                         event_ctx = s4_event_context_init(templates_ldb);
 125                 }
 126
 127                 templates_ldb = ldb_wrap_connect(ldb, event_ctx, lp_ctx,
 128                                                 templates_ldb_path, NULL,
 129                                                 NULL, 0, NULL);
 130                 talloc_free(templates_ldb_path);
 131                 if (!templates_ldb) {
 132                         *errstring = talloc_asprintf(msg, "samdb_copy_template: ERROR: Failed to connect to templates db at: %s",
 133                                              templates_ldb_path);
 134                         return LDB_ERR_OPERATIONS_ERROR;
 135                 }
 136
 137                 ret = ldb_set_opaque(ldb, "templates_ldb", templates_ldb);
 138                 if (ret != LDB_SUCCESS) {
 139                         return ret;
 140                 }
 141         }
 142         *errstring = NULL;
 143
 144         basedn = ldb_dn_new(templates_ldb, ldb, "cn=Templates");
 145         if (!ldb_dn_add_child_fmt(basedn, "CN=Template%s", name)) {
 146                 talloc_free(basedn);
 147                 *errstring = talloc_asprintf(msg, "samdb_copy_template: ERROR: Failed to contruct DN for template '%s'",
 148                                              name);
 149                 return LDB_ERR_OPERATIONS_ERROR;
 150         }
 151
 152         /* pull the template record */
 153         ret = ldb_search(templates_ldb, basedn, LDB_SCOPE_BASE, "distinguishedName=*", NULL, &res);
 154         talloc_free(basedn);
 155         if (ret != LDB_SUCCESS) {
 156                 *errstring = talloc_steal(msg, ldb_errstring(templates_ldb));
 157                 return ret;
 158         }
 159         if (res->count != 1) {
 160                 *errstring = talloc_asprintf(msg, "samdb_copy_template: ERROR: template '%s' matched %d records, expected 1",
 161                                              name,
 162                                              res->count);
 163                 talloc_free(res);
 164                 return LDB_ERR_OPERATIONS_ERROR;
 165         }
 166         t = res->msgs[0];
 167
 168         for (i = 0; i < t->num_elements; i++) {
 169                 struct ldb_message_element *el = &t->elements[i];
 170                 /* some elements should not be copied from the template */
 171                 if (ldb_attr_cmp(el->name, "cn") == 0 ||
 172                     ldb_attr_cmp(el->name, "name") == 0 ||
 173                     ldb_attr_cmp(el->name, "objectClass") == 0 ||
 174                     ldb_attr_cmp(el->name, "sAMAccountName") == 0 ||
 175                     ldb_attr_cmp(el->name, "sAMAccountName") == 0 ||
 176                     ldb_attr_cmp(el->name, "distinguishedName") == 0 ||
 177                     ldb_attr_cmp(el->name, "objectGUID") == 0) {
 178                         continue;
 179                 }
 180                 for (j = 0; j < el->num_values; j++) {
 181                         ret = samdb_find_or_add_attribute(ldb, msg, el->name,
 182                                                           (char *)el->values[j].data);
 183                         if (ret) {
 184                                 *errstring = talloc_asprintf(msg, "Adding attribute %s failed.", el->name);
 185                                 talloc_free(res);
 186                                 return ret;
 187                         }
 188                 }
 189         }
 190
 191         talloc_free(res);
 192
 193         return LDB_SUCCESS;
 194 }
 195
 196
 197 /****************************************************************************
 198  Create the SID list for this user.
 199 ****************************************************************************/
 200 NTSTATUS security_token_create(TALLOC_CTX *mem_ctx,
 201                                struct event_context *ev_ctx,
 202                                struct loadparm_context *lp_ctx,
 203                                struct dom_sid *user_sid,
 204                                struct dom_sid *group_sid,
 205                                int n_groupSIDs,
 206                                struct dom_sid **groupSIDs,
 207                                bool is_authenticated,
 208                                struct security_token **token)
 209 {
 210         struct security_token *ptoken;
 211         int i;
 212         NTSTATUS status;
 213
 214         ptoken = security_token_initialise(mem_ctx);
 215         NT_STATUS_HAVE_NO_MEMORY(ptoken);
 216
 217         ptoken->sids = talloc_array(ptoken, struct dom_sid *, n_groupSIDs + 5);
 218         NT_STATUS_HAVE_NO_MEMORY(ptoken->sids);
 219
 220         ptoken->user_sid = talloc_reference(ptoken, user_sid);
 221         ptoken->group_sid = talloc_reference(ptoken, group_sid);
 222         ptoken->privilege_mask = 0;
 223
 224         ptoken->sids[0] = ptoken->user_sid;
 225         ptoken->sids[1] = ptoken->group_sid;
 226
 227         /*
 228          * Finally add the "standard" SIDs.
 229          * The only difference between guest and "anonymous"
 230          * is the addition of Authenticated_Users.
 231          */
 232         ptoken->sids[2] = dom_sid_parse_talloc(ptoken->sids, SID_WORLD);
 233         NT_STATUS_HAVE_NO_MEMORY(ptoken->sids[2]);
 234         ptoken->sids[3] = dom_sid_parse_talloc(ptoken->sids, SID_NT_NETWORK);
 235         NT_STATUS_HAVE_NO_MEMORY(ptoken->sids[3]);
 236         ptoken->num_sids = 4;
 237
 238         if (is_authenticated) {
 239                 ptoken->sids[4] = dom_sid_parse_talloc(ptoken->sids, SID_NT_AUTHENTICATED_USERS);
 240                 NT_STATUS_HAVE_NO_MEMORY(ptoken->sids[4]);
 241                 ptoken->num_sids++;
 242         }
 243
 244         for (i = 0; i < n_groupSIDs; i++) {
 245                 size_t check_sid_idx;
 246                 for (check_sid_idx = 1;
 247                      check_sid_idx < ptoken->num_sids;
 248                      check_sid_idx++) {
 249                         if (dom_sid_equal(ptoken->sids[check_sid_idx], groupSIDs[i])) {
 250                                 break;
 251                         }
 252                 }
 253
 254                 if (check_sid_idx == ptoken->num_sids) {
 255                         ptoken->sids[ptoken->num_sids++] = talloc_reference(ptoken->sids, groupSIDs[i]);
 256                 }
 257         }
 258
 259         /* setup the privilege mask for this token */
 260         status = samdb_privilege_setup(ev_ctx, lp_ctx, ptoken);
 261         if (!NT_STATUS_IS_OK(status)) {
 262                 talloc_free(ptoken);
 263                 return status;
 264         }
 265
 266         security_token_debug(10, ptoken);
 267
 268         *token = ptoken;
 269
 270         return NT_STATUS_OK;
 271 }