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 "param/param.h"
  27 #include "rpc_server/drsuapi/dcesrv_drsuapi.h"
  28 #include "librpc/gen_ndr/ndr_drsuapi.h"
  29
  30
  31 /*
  32   add special SPNs needed for DRS replication to machine accounts when
  33   an AddEntry is done to create a nTDSDSA object
  34  */
  35 static WERROR drsuapi_add_SPNs(struct drsuapi_bind_state *b_state,
  36                                struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
  37                                const struct drsuapi_DsReplicaObjectListItem *first_object)
  38 {
  39         int ret;
  40         const struct drsuapi_DsReplicaObjectListItem *obj;
  41         const char *attrs[] = { "serverReference", "objectGUID", NULL };
  42
  43         for (obj = first_object; obj; obj=obj->next_object) {
  44                 const char *dn_string = obj->object.identifier->dn;
  45                 struct ldb_dn *dn = ldb_dn_new(mem_ctx, b_state->sam_ctx, dn_string);
  46                 struct ldb_result *res;
  47                 struct ldb_dn *ref_dn;
  48                 struct GUID ntds_guid;
  49                 struct ldb_message *msg;
  50                 struct ldb_message_element *el;
  51                 const char *ntds_guid_str;
  52                 const char *dom_string;
  53
  54                 DEBUG(6,(__location__ ": Adding SPNs for %s\n",
  55                          ldb_dn_get_linearized(dn)));
  56
  57                 ret = ldb_search(b_state->sam_ctx, mem_ctx, &res,
  58                                  dn, LDB_SCOPE_BASE, attrs,
  59                                  "(objectClass=ntDSDSA)");
  60                 if (ret != LDB_SUCCESS || res->count < 1) {
  61                         DEBUG(0,(__location__ ": Failed to find dn '%s'\n", dn_string));
  62                         return WERR_DS_DRA_INTERNAL_ERROR;
  63                 }
  64
  65                 ref_dn = samdb_result_dn(b_state->sam_ctx, mem_ctx, res->msgs[0], "serverReference", NULL);
  66                 if (ref_dn == NULL) {
  67                         /* we only add SPNs for objects with a
  68                            serverReference */
  69                         continue;
  70                 }
  71
  72                 DEBUG(6,(__location__ ": serverReference %s\n",
  73                          ldb_dn_get_linearized(ref_dn)));
  74
  75                 ntds_guid = samdb_result_guid(res->msgs[0], "objectGUID");
  76
  77                 ntds_guid_str = GUID_string(res, &ntds_guid);
  78
  79                 dom_string = lp_dnsdomain(dce_call->conn->dce_ctx->lp_ctx);
  80
  81                 /*
  82                  * construct a modify request to add the new SPNs to
  83                  * the machine account
  84                  */
  85                 msg = ldb_msg_new(mem_ctx);
  86                 if (msg == NULL) {
  87                         return WERR_NOMEM;
  88                 }
  89
  90                 msg->dn = ref_dn;
  91                 ret = ldb_msg_add_empty(msg, "servicePrincipalName",
  92                                         LDB_FLAG_MOD_ADD, &el);
  93                 if (ret != LDB_SUCCESS) {
  94                         return WERR_NOMEM;
  95                 }
  96
  97                 el->num_values = 2;
  98                 el->values = talloc_array(msg->elements, struct ldb_val, 2);
  99                 if (el->values == NULL) {
 100                         return WERR_NOMEM;
 101                 }
 102                 /* the magic constant is the GUID of the DRSUAPI RPC
 103                    interface */
 104                 el->values[0].data = (uint8_t *)talloc_asprintf(el->values,
 105                                                                 "E3514235-4B06-11D1-AB04-00C04FC2DCD2/%s/%s",
 106                                                                 ntds_guid_str, dom_string);
 107                 el->values[0].length = strlen((char *)el->values[0].data);
 108                 el->values[1].data = (uint8_t *)talloc_asprintf(el->values, "ldap/%s._msdcs.%s",
 109                                                                 ntds_guid_str, dom_string);
 110                 el->values[1].length = strlen((char *)el->values[1].data);
 111
 112                 ret = ldb_modify(b_state->sam_ctx, msg);
 113                 if (ret != LDB_SUCCESS) {
 114                         DEBUG(0,(__location__ ": Failed to add SPNs - %s\n",
 115                                  ldb_errstring(b_state->sam_ctx)));
 116                         return WERR_DS_DRA_INTERNAL_ERROR;
 117                 }
 118         }
 119
 120         return WERR_OK;
 121 }
 122
 123
 124
 125
 126 /*
 127   drsuapi_DsAddEntry
 128 */
 129 WERROR dcesrv_drsuapi_DsAddEntry(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 130                                  struct drsuapi_DsAddEntry *r)
 131 {
 132         WERROR status;
 133         struct drsuapi_bind_state *b_state;
 134         struct dcesrv_handle *h;
 135         uint32_t num = 0;
 136         struct drsuapi_DsReplicaObjectIdentifier2 *ids = NULL;
 137         int ret;
 138         const struct drsuapi_DsReplicaObjectListItem *first_object;
 139
 140         if (DEBUGLVL(4)) {
 141                 NDR_PRINT_FUNCTION_DEBUG(drsuapi_DsAddEntry, NDR_IN, r);
 142         }
 143
 144         /* TODO: check which out level the client supports */
 145
 146         ZERO_STRUCTP(r->out.ctr);
 147         *r->out.level_out = 3;
 148         r->out.ctr->ctr3.level = 1;
 149         r->out.ctr->ctr3.error = talloc_zero(mem_ctx, union drsuapi_DsAddEntryError);
 150
 151         DCESRV_PULL_HANDLE_WERR(h, r->in.bind_handle, DRSUAPI_BIND_HANDLE);
 152         b_state = h->data;
 153
 154         status = drs_security_level_check(dce_call, "DsAddEntry");
 155         if (!W_ERROR_IS_OK(status)) {
 156                 return status;
 157         }
 158
 159         switch (r->in.level) {
 160         case 2:
 161                 ret = ldb_transaction_start(b_state->sam_ctx);
 162                 if (ret != LDB_SUCCESS) {
 163                         return WERR_DS_DRA_INTERNAL_ERROR;
 164                 }
 165
 166
 167                 first_object = &r->in.req->req2.first_object;
 168
 169                 status = dsdb_origin_objects_commit(b_state->sam_ctx,
 170                                                     mem_ctx,
 171                                                     first_object,
 172                                                     &num,
 173                                                     &ids);
 174                 if (!W_ERROR_IS_OK(status)) {
 175                         r->out.ctr->ctr3.error->info1.status = status;
 176                         ldb_transaction_cancel(b_state->sam_ctx);
 177                         DEBUG(0,(__location__ ": DsAddEntry failed - %s\n", win_errstr(status)));
 178                         return status;
 179                 }
 180
 181                 r->out.ctr->ctr3.count = num;
 182                 r->out.ctr->ctr3.objects = ids;
 183
 184                 break;
 185         default:
 186                 return WERR_FOOBAR;
 187         }
 188
 189         /* if any of the added entries are nTDSDSA objects then we
 190          * need to add the SPNs to the machine account
 191          */
 192         status = drsuapi_add_SPNs(b_state, dce_call, mem_ctx, first_object);
 193         if (!W_ERROR_IS_OK(status)) {
 194                 r->out.ctr->ctr3.error->info1.status = status;
 195                 ldb_transaction_cancel(b_state->sam_ctx);
 196                 DEBUG(0,(__location__ ": DsAddEntry add SPNs failed - %s\n", win_errstr(status)));
 197                 return status;
 198         }
 199
 200         ret = ldb_transaction_commit(b_state->sam_ctx);
 201         if (ret != LDB_SUCCESS) {
 202                 DEBUG(0,(__location__ ": DsAddEntry commit failed\n"));
 203                 return WERR_DS_DRA_INTERNAL_ERROR;
 204         }
 205
 206         return WERR_OK;
 207 }