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, *res2;
  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                 const char *attrs2[] = { "dNSHostName", "cn", NULL };
  54                 const char *dNSHostName, *cn;
  55
  56                 DEBUG(6,(__location__ ": Adding SPNs for %s\n",
  57                          ldb_dn_get_linearized(dn)));
  58
  59                 ret = ldb_search(b_state->sam_ctx, mem_ctx, &res,
  60                                  dn, LDB_SCOPE_BASE, attrs,
  61                                  "(objectClass=ntDSDSA)");
  62                 if (ret != LDB_SUCCESS || res->count < 1) {
  63                         DEBUG(0,(__location__ ": Failed to find dn '%s'\n", dn_string));
  64                         return WERR_DS_DRA_INTERNAL_ERROR;
  65                 }
  66
  67                 ref_dn = samdb_result_dn(b_state->sam_ctx, mem_ctx, res->msgs[0], "serverReference", NULL);
  68                 if (ref_dn == NULL) {
  69                         /* we only add SPNs for objects with a
  70                            serverReference */
  71                         continue;
  72                 }
  73
  74                 DEBUG(6,(__location__ ": serverReference %s\n",
  75                          ldb_dn_get_linearized(ref_dn)));
  76
  77                 ntds_guid = samdb_result_guid(res->msgs[0], "objectGUID");
  78
  79                 ntds_guid_str = GUID_string(res, &ntds_guid);
  80
  81                 dom_string = lp_dnsdomain(dce_call->conn->dce_ctx->lp_ctx);
  82
  83                 /* get the dNSHostName and cn */
  84                 ret = ldb_search(b_state->sam_ctx, mem_ctx, &res2,
  85                                  ref_dn, LDB_SCOPE_BASE, attrs2, NULL);
  86                 if (ret != LDB_SUCCESS) {
  87                         DEBUG(0,(__location__ ": Failed to find ref_dn '%s'\n",
  88                                  ldb_dn_get_linearized(ref_dn)));
  89                         return WERR_DS_DRA_INTERNAL_ERROR;
  90                 }
  91
  92                 dNSHostName = ldb_msg_find_attr_as_string(res2->msgs[0], "dNSHostName", NULL);
  93                 cn = ldb_msg_find_attr_as_string(res2->msgs[0], "cn", NULL);
  94
  95                 /*
  96                  * construct a modify request to add the new SPNs to
  97                  * the machine account
  98                  */
  99                 msg = ldb_msg_new(mem_ctx);
 100                 if (msg == NULL) {
 101                         return WERR_NOMEM;
 102                 }
 103
 104                 msg->dn = ref_dn;
 105                 ret = ldb_msg_add_empty(msg, "servicePrincipalName",
 106                                         LDB_FLAG_MOD_ADD, &el);
 107                 if (ret != LDB_SUCCESS) {
 108                         return WERR_NOMEM;
 109                 }
 110
 111
 112                 ldb_msg_add_steal_string(msg, "servicePrincipalName",
 113                                          talloc_asprintf(el->values,
 114                                                          "E3514235-4B06-11D1-AB04-00C04FC2DCD2/%s/%s",
 115                                                          ntds_guid_str, dom_string));
 116                 ldb_msg_add_steal_string(msg, "servicePrincipalName",
 117                                          talloc_asprintf(el->values, "ldap/%s._msdcs.%s",
 118                                                          ntds_guid_str, dom_string));
 119                 if (cn) {
 120                         ldb_msg_add_steal_string(msg, "servicePrincipalName",
 121                                                  talloc_asprintf(el->values, "ldap/%s", cn));
 122                 }
 123                 if (dNSHostName) {
 124                         ldb_msg_add_steal_string(msg, "servicePrincipalName",
 125                                                  talloc_asprintf(el->values, "ldap/%s", dNSHostName));
 126                 }
 127                 if (el->num_values < 2) {
 128                         return WERR_NOMEM;
 129                 }
 130
 131                 ret = ldb_modify(b_state->sam_ctx, msg);
 132                 if (ret != LDB_SUCCESS) {
 133                         DEBUG(0,(__location__ ": Failed to add SPNs - %s\n",
 134                                  ldb_errstring(b_state->sam_ctx)));
 135                         return WERR_DS_DRA_INTERNAL_ERROR;
 136                 }
 137         }
 138
 139         return WERR_OK;
 140 }
 141
 142
 143
 144
 145 /*
 146   drsuapi_DsAddEntry
 147 */
 148 WERROR dcesrv_drsuapi_DsAddEntry(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 149                                  struct drsuapi_DsAddEntry *r)
 150 {
 151         WERROR status;
 152         struct drsuapi_bind_state *b_state;
 153         struct dcesrv_handle *h;
 154         uint32_t num = 0;
 155         struct drsuapi_DsReplicaObjectIdentifier2 *ids = NULL;
 156         int ret;
 157         const struct drsuapi_DsReplicaObjectListItem *first_object;
 158
 159         if (DEBUGLVL(4)) {
 160                 NDR_PRINT_FUNCTION_DEBUG(drsuapi_DsAddEntry, NDR_IN, r);
 161         }
 162
 163         /* TODO: check which out level the client supports */
 164
 165         ZERO_STRUCTP(r->out.ctr);
 166         *r->out.level_out = 3;
 167         r->out.ctr->ctr3.level = 1;
 168         r->out.ctr->ctr3.error = talloc_zero(mem_ctx, union drsuapi_DsAddEntryError);
 169
 170         DCESRV_PULL_HANDLE_WERR(h, r->in.bind_handle, DRSUAPI_BIND_HANDLE);
 171         b_state = h->data;
 172
 173         status = drs_security_level_check(dce_call, "DsAddEntry");
 174         if (!W_ERROR_IS_OK(status)) {
 175                 return status;
 176         }
 177
 178         switch (r->in.level) {
 179         case 2:
 180                 ret = ldb_transaction_start(b_state->sam_ctx);
 181                 if (ret != LDB_SUCCESS) {
 182                         return WERR_DS_DRA_INTERNAL_ERROR;
 183                 }
 184
 185
 186                 first_object = &r->in.req->req2.first_object;
 187
 188                 status = dsdb_origin_objects_commit(b_state->sam_ctx,
 189                                                     mem_ctx,
 190                                                     first_object,
 191                                                     &num,
 192                                                     &ids);
 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 failed - %s\n", win_errstr(status)));
 197                         return status;
 198                 }
 199
 200                 r->out.ctr->ctr3.count = num;
 201                 r->out.ctr->ctr3.objects = ids;
 202
 203                 break;
 204         default:
 205                 return WERR_FOOBAR;
 206         }
 207
 208         /* if any of the added entries are nTDSDSA objects then we
 209          * need to add the SPNs to the machine account
 210          */
 211         status = drsuapi_add_SPNs(b_state, dce_call, mem_ctx, first_object);
 212         if (!W_ERROR_IS_OK(status)) {
 213                 r->out.ctr->ctr3.error->info1.status = status;
 214                 ldb_transaction_cancel(b_state->sam_ctx);
 215                 DEBUG(0,(__location__ ": DsAddEntry add SPNs failed - %s\n", win_errstr(status)));
 216                 return status;
 217         }
 218
 219         ret = ldb_transaction_commit(b_state->sam_ctx);
 220         if (ret != LDB_SUCCESS) {
 221                 DEBUG(0,(__location__ ": DsAddEntry commit failed: %s\n",
 222                          ldb_errstring(b_state->sam_ctx)));
 223                 return WERR_DS_DRA_INTERNAL_ERROR;
 224         }
 225
 226         return WERR_OK;
 227 }