source4/rpc_server/drsuapi/addentry.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    implement the DsAddEntry call
   5
   6    Copyright (C) Stefan Metzmacher 2009
   7    Copyright (C) Andrew Tridgell   2009
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24 #include "rpc_server/dcerpc_server.h"
  25 #include "dsdb/samdb/samdb.h"
  26 #include "dsdb/common/util.h"
  27 #include "param/param.h"
  28 #include "rpc_server/drsuapi/dcesrv_drsuapi.h"
  29 #include "librpc/gen_ndr/ndr_drsuapi.h"
  30 #include "libcli/security/security.h"
  31
  32 /*
  33   add special SPNs needed for DRS replication to machine accounts when
  34   an AddEntry is done to create a nTDSDSA object
  35  */
  36 static WERROR drsuapi_add_SPNs(struct drsuapi_bind_state *b_state,
  37                                struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
  38                                const struct drsuapi_DsReplicaObjectListItem *first_object)
  39 {
  40         int ret;
  41         const struct drsuapi_DsReplicaObjectListItem *obj;
  42         const char *attrs[] = { "serverReference", "objectGUID", NULL };
  43
  44         for (obj = first_object; obj; obj=obj->next_object) {
  45                 const char *dn_string = obj->object.identifier->dn;
  46                 struct ldb_dn *dn = ldb_dn_new(mem_ctx, b_state->sam_ctx, dn_string);
  47                 struct ldb_result *res, *res2;
  48                 struct ldb_dn *ref_dn;
  49                 struct GUID ntds_guid;
  50                 struct ldb_message *msg;
  51                 struct ldb_message_element *el;
  52                 const char *ntds_guid_str;
  53                 const char *dom_string;
  54                 const char *attrs2[] = { "dNSHostName", "cn", NULL };
  55                 const char *dNSHostName, *cn;
  56
  57                 DEBUG(6,(__location__ ": Adding SPNs for %s\n",
  58                          ldb_dn_get_linearized(dn)));
  59
  60                 ret = ldb_search(b_state->sam_ctx, mem_ctx, &res,
  61                                  dn, LDB_SCOPE_BASE, attrs,
  62                                  "(objectClass=ntDSDSA)");
  63                 if (ret != LDB_SUCCESS || res->count < 1) {
  64                         DEBUG(0,(__location__ ": Failed to find dn '%s'\n", dn_string));
  65                         return WERR_DS_DRA_INTERNAL_ERROR;
  66                 }
  67
  68                 ref_dn = samdb_result_dn(b_state->sam_ctx, mem_ctx, res->msgs[0], "serverReference", NULL);
  69                 if (ref_dn == NULL) {
  70                         /* we only add SPNs for objects with a
  71                            serverReference */
  72                         continue;
  73                 }
  74
  75                 DEBUG(6,(__location__ ": serverReference %s\n",
  76                          ldb_dn_get_linearized(ref_dn)));
  77
  78                 ntds_guid = samdb_result_guid(res->msgs[0], "objectGUID");
  79
  80                 ntds_guid_str = GUID_string(res, &ntds_guid);
  81
  82                 dom_string = lpcfg_dnsdomain(dce_call->conn->dce_ctx->lp_ctx);
  83
  84                 /* get the dNSHostName and cn */
  85                 ret = ldb_search(b_state->sam_ctx, mem_ctx, &res2,
  86                                  ref_dn, LDB_SCOPE_BASE, attrs2, NULL);
  87                 if (ret != LDB_SUCCESS) {
  88                         DEBUG(0,(__location__ ": Failed to find ref_dn '%s'\n",
  89                                  ldb_dn_get_linearized(ref_dn)));
  90                         return WERR_DS_DRA_INTERNAL_ERROR;
  91                 }
  92
  93                 dNSHostName = ldb_msg_find_attr_as_string(res2->msgs[0], "dNSHostName", NULL);
  94                 cn = ldb_msg_find_attr_as_string(res2->msgs[0], "cn", NULL);
  95
  96                 /*
  97                  * construct a modify request to add the new SPNs to
  98                  * the machine account
  99                  */
 100                 msg = ldb_msg_new(mem_ctx);
 101                 if (msg == NULL) {
 102                         return WERR_NOMEM;
 103                 }
 104
 105                 msg->dn = ref_dn;
 106                 ret = ldb_msg_add_empty(msg, "servicePrincipalName",
 107                                         LDB_FLAG_MOD_ADD, &el);
 108                 if (ret != LDB_SUCCESS) {
 109                         return WERR_NOMEM;
 110                 }
 111
 112
 113                 ldb_msg_add_steal_string(msg, "servicePrincipalName",
 114                                          talloc_asprintf(el->values,
 115                                                          "E3514235-4B06-11D1-AB04-00C04FC2DCD2/%s/%s",
 116                                                          ntds_guid_str, dom_string));
 117                 ldb_msg_add_steal_string(msg, "servicePrincipalName",
 118                                          talloc_asprintf(el->values, "ldap/%s._msdcs.%s",
 119                                                          ntds_guid_str, dom_string));
 120                 if (cn) {
 121                         ldb_msg_add_steal_string(msg, "servicePrincipalName",
 122                                                  talloc_asprintf(el->values, "ldap/%s", cn));
 123                 }
 124                 if (dNSHostName) {
 125                         ldb_msg_add_steal_string(msg, "servicePrincipalName",
 126                                                  talloc_asprintf(el->values, "ldap/%s", dNSHostName));
 127                 }
 128                 if (el->num_values < 2) {
 129                         return WERR_NOMEM;
 130                 }
 131
 132                 ret = dsdb_modify(b_state->sam_ctx, msg, DSDB_MODIFY_PERMISSIVE);
 133                 if (ret != LDB_SUCCESS) {
 134                         DEBUG(0,(__location__ ": Failed to add SPNs - %s\n",
 135                                  ldb_errstring(b_state->sam_ctx)));
 136                         return WERR_DS_DRA_INTERNAL_ERROR;
 137                 }
 138         }
 139
 140         return WERR_OK;
 141 }
 142
 143
 144
 145
 146 /*
 147   drsuapi_DsAddEntry
 148 */
 149 WERROR dcesrv_drsuapi_DsAddEntry(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 150                                  struct drsuapi_DsAddEntry *r)
 151 {
 152         WERROR status;
 153         struct drsuapi_bind_state *b_state;
 154         struct dcesrv_handle *h;
 155         uint32_t num = 0;
 156         struct drsuapi_DsReplicaObjectIdentifier2 *ids = NULL;
 157         int ret;
 158         const struct drsuapi_DsReplicaObjectListItem *first_object;
 159
 160         if (DEBUGLVL(4)) {
 161                 NDR_PRINT_FUNCTION_DEBUG(drsuapi_DsAddEntry, NDR_IN, r);
 162         }
 163
 164         /* TODO: check which out level the client supports */
 165
 166         ZERO_STRUCTP(r->out.ctr);
 167         *r->out.level_out = 3;
 168         r->out.ctr->ctr3.err_ver = 1;
 169         r->out.ctr->ctr3.err_data = talloc_zero(mem_ctx, union drsuapi_DsAddEntry_ErrData);
 170
 171         DCESRV_PULL_HANDLE_WERR(h, r->in.bind_handle, DRSUAPI_BIND_HANDLE);
 172         b_state = h->data;
 173
 174         status = drs_security_level_check(dce_call, "DsAddEntry", SECURITY_DOMAIN_CONTROLLER);
 175         if (!W_ERROR_IS_OK(status)) {
 176                 return status;
 177         }
 178
 179         switch (r->in.level) {
 180         case 2:
 181                 ret = ldb_transaction_start(b_state->sam_ctx);
 182                 if (ret != LDB_SUCCESS) {
 183                         return WERR_DS_DRA_INTERNAL_ERROR;
 184                 }
 185
 186
 187                 first_object = &r->in.req->req2.first_object;
 188
 189                 status = dsdb_origin_objects_commit(b_state->sam_ctx,
 190                                                     mem_ctx,
 191                                                     first_object,
 192                                                     &num,
 193                                                     &ids);
 194                 if (!W_ERROR_IS_OK(status)) {
 195                         r->out.ctr->ctr3.err_data->v1.status = status;
 196                         ldb_transaction_cancel(b_state->sam_ctx);
 197                         DEBUG(0,(__location__ ": DsAddEntry failed - %s\n", win_errstr(status)));
 198                         return status;
 199                 }
 200
 201                 r->out.ctr->ctr3.count = num;
 202                 r->out.ctr->ctr3.objects = ids;
 203
 204                 break;
 205         default:
 206                 return WERR_FOOBAR;
 207         }
 208
 209         /* if any of the added entries are nTDSDSA objects then we
 210          * need to add the SPNs to the machine account
 211          */
 212         status = drsuapi_add_SPNs(b_state, dce_call, mem_ctx, first_object);
 213         if (!W_ERROR_IS_OK(status)) {
 214                 r->out.ctr->ctr3.err_data->v1.status = status;
 215                 ldb_transaction_cancel(b_state->sam_ctx);
 216                 DEBUG(0,(__location__ ": DsAddEntry add SPNs failed - %s\n", win_errstr(status)));
 217                 return status;
 218         }
 219
 220         ret = ldb_transaction_commit(b_state->sam_ctx);
 221         if (ret != LDB_SUCCESS) {
 222                 DEBUG(0,(__location__ ": DsAddEntry commit failed: %s\n",
 223                          ldb_errstring(b_state->sam_ctx)));
 224                 return WERR_DS_DRA_INTERNAL_ERROR;
 225         }
 226
 227         return WERR_OK;
 228 }