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