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 "rpc_server/common/common.h"
  26 #include "dsdb/samdb/samdb.h"
  27 #include "lib/ldb/include/ldb_errors.h"
  28 #include "param/param.h"
  29 #include "librpc/gen_ndr/ndr_drsblobs.h"
  30 #include "auth/auth.h"
  31 #include "rpc_server/drsuapi/dcesrv_drsuapi.h"
  32 #include "libcli/security/security.h"
  33 #include "librpc/gen_ndr/ndr_drsblobs.h"
  34 #include "librpc/gen_ndr/ndr_drsuapi.h"
  35
  36
  37 /*
  38   add special SPNs needed for DRS replication to machine accounts when
  39   an AddEntry is done to create a nTDSDSA object
  40  */
  41 static WERROR drsuapi_add_SPNs(struct drsuapi_bind_state *b_state,
  42                                struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
  43                                const struct drsuapi_DsReplicaObjectListItem *first_object)
  44 {
  45         int ret;
  46         const struct drsuapi_DsReplicaObjectListItem *obj;
  47         const char *attrs[] = { "serverReference", "objectGUID", NULL };
  48
  49         for (obj = first_object; obj; obj=obj->next_object) {
  50                 const char *dn_string = obj->object.identifier->dn;
  51                 struct ldb_dn *dn = ldb_dn_new(mem_ctx, b_state->sam_ctx, dn_string);
  52                 struct ldb_result *res;
  53                 struct ldb_dn *ref_dn;
  54                 struct GUID ntds_guid;
  55                 struct ldb_message *msg;
  56                 struct ldb_message_element *el;
  57                 const char *ntds_guid_str;
  58                 const char *dom_string;
  59
  60                 DEBUG(6,(__location__ ": Adding SPNs for %s\n",
  61                          ldb_dn_get_linearized(dn)));
  62
  63                 ret = ldb_search(b_state->sam_ctx, mem_ctx, &res,
  64                                  dn, LDB_SCOPE_BASE, attrs,
  65                                  "(objectClass=ntDSDSA)");
  66                 if (ret != LDB_SUCCESS || res->count < 1) {
  67                         DEBUG(0,(__location__ ": Failed to find dn '%s'\n", dn_string));
  68                         return WERR_DS_DRA_INTERNAL_ERROR;
  69                 }
  70
  71                 ref_dn = samdb_result_dn(b_state->sam_ctx, mem_ctx, res->msgs[0], "serverReference", NULL);
  72                 if (ref_dn == NULL) {
  73                         /* we only add SPNs for objects with a
  74                            serverReference */
  75                         continue;
  76                 }
  77
  78                 DEBUG(6,(__location__ ": serverReference %s\n",
  79                          ldb_dn_get_linearized(ref_dn)));
  80
  81                 ntds_guid = samdb_result_guid(res->msgs[0], "objectGUID");
  82
  83                 ntds_guid_str = GUID_string(res, &ntds_guid);
  84
  85                 dom_string = lp_dnsdomain(dce_call->conn->dce_ctx->lp_ctx);
  86
  87                 /*
  88                  * construct a modify request to add the new SPNs to
  89                  * the machine account
  90                  */
  91                 msg = ldb_msg_new(mem_ctx);
  92                 if (msg == NULL) {
  93                         return WERR_NOMEM;
  94                 }
  95
  96                 msg->dn = ref_dn;
  97                 ret = ldb_msg_add_empty(msg, "servicePrincipalName",
  98                                         LDB_FLAG_MOD_ADD, &el);
  99                 if (ret != LDB_SUCCESS) {
 100                         return WERR_NOMEM;
 101                 }
 102
 103                 el->num_values = 2;
 104                 el->values = talloc_array(msg->elements, struct ldb_val, 2);
 105                 if (el->values == NULL) {
 106                         return WERR_NOMEM;
 107                 }
 108                 /* the magic constant is the GUID of the DRSUAPI RPC
 109                    interface */
 110                 el->values[0].data = (uint8_t *)talloc_asprintf(el->values,
 111                                                                 "E3514235-4B06-11D1-AB04-00C04FC2DCD2/%s/%s",
 112                                                                 ntds_guid_str, dom_string);
 113                 el->values[0].length = strlen((char *)el->values[0].data);
 114                 el->values[1].data = (uint8_t *)talloc_asprintf(el->values, "ldap/%s._msdcs.%s",
 115                                                                 ntds_guid_str, dom_string);
 116                 el->values[1].length = strlen((char *)el->values[1].data);
 117
 118                 ret = ldb_modify(b_state->sam_ctx, msg);
 119                 if (ret != LDB_SUCCESS) {
 120                         DEBUG(0,(__location__ ": Failed to add SPNs - %s\n",
 121                                  ldb_errstring(b_state->sam_ctx)));
 122                         return WERR_DS_DRA_INTERNAL_ERROR;
 123                 }
 124         }
 125
 126         return WERR_OK;
 127 }
 128
 129
 130
 131
 132 /*
 133   drsuapi_DsAddEntry
 134 */
 135 WERROR dcesrv_drsuapi_DsAddEntry(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 136                                  struct drsuapi_DsAddEntry *r)
 137 {
 138         WERROR status;
 139         struct drsuapi_bind_state *b_state;
 140         struct dcesrv_handle *h;
 141         uint32_t num = 0;
 142         struct drsuapi_DsReplicaObjectIdentifier2 *ids = NULL;
 143         int ret;
 144         const struct drsuapi_DsReplicaObjectListItem *first_object;
 145
 146         if (DEBUGLVL(4)) {
 147                 NDR_PRINT_FUNCTION_DEBUG(drsuapi_DsAddEntry, NDR_IN, r);
 148         }
 149
 150         /* TODO: check which out level the client supports */
 151
 152         ZERO_STRUCTP(r->out.ctr);
 153         *r->out.level_out = 3;
 154         r->out.ctr->ctr3.level = 1;
 155         r->out.ctr->ctr3.error = talloc_zero(mem_ctx, union drsuapi_DsAddEntryError);
 156
 157         DCESRV_PULL_HANDLE_WERR(h, r->in.bind_handle, DRSUAPI_BIND_HANDLE);
 158         b_state = h->data;
 159
 160         status = drs_security_level_check(dce_call, "DsAddEntry");
 161         if (!W_ERROR_IS_OK(status)) {
 162                 return status;
 163         }
 164
 165         switch (r->in.level) {
 166         case 2:
 167                 ret = ldb_transaction_start(b_state->sam_ctx);
 168                 if (ret != LDB_SUCCESS) {
 169                         return WERR_DS_DRA_INTERNAL_ERROR;
 170                 }
 171
 172
 173                 first_object = &r->in.req->req2.first_object;
 174
 175                 status = dsdb_origin_objects_commit(b_state->sam_ctx,
 176                                                     mem_ctx,
 177                                                     first_object,
 178                                                     &num,
 179                                                     &ids);
 180                 if (!W_ERROR_IS_OK(status)) {
 181                         r->out.ctr->ctr3.error->info1.status = status;
 182                         ldb_transaction_cancel(b_state->sam_ctx);
 183                         DEBUG(0,(__location__ ": DsAddEntry failed - %s\n", win_errstr(status)));
 184                         return status;
 185                 }
 186
 187                 r->out.ctr->ctr3.count = num;
 188                 r->out.ctr->ctr3.objects = ids;
 189
 190                 break;
 191         default:
 192                 return WERR_FOOBAR;
 193         }
 194
 195         /* if any of the added entries are nTDSDSA objects then we
 196          * need to add the SPNs to the machine account
 197          */
 198         status = drsuapi_add_SPNs(b_state, dce_call, mem_ctx, first_object);
 199         if (!W_ERROR_IS_OK(status)) {
 200                 r->out.ctr->ctr3.error->info1.status = status;
 201                 ldb_transaction_cancel(b_state->sam_ctx);
 202                 DEBUG(0,(__location__ ": DsAddEntry add SPNs failed - %s\n", win_errstr(status)));
 203                 return status;
 204         }
 205
 206         ret = ldb_transaction_commit(b_state->sam_ctx);
 207         if (ret != LDB_SUCCESS) {
 208                 DEBUG(0,(__location__ ": DsAddEntry commit failed\n"));
 209                 return WERR_DS_DRA_INTERNAL_ERROR;
 210         }
 211
 212         return WERR_OK;
 213 }