source4/rpc_server/drsuapi/drsutil.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    useful utilities for the DRS server
   5
   6    Copyright (C) Andrew Tridgell 2009
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "rpc_server/dcerpc_server.h"
  24 #include "dsdb/samdb/samdb.h"
  25 #include "libcli/security/security.h"
  26 #include "param/param.h"
  27 #include "auth/session.h"
  28
  29 /*
  30   format a drsuapi_DsReplicaObjectIdentifier naming context as a string
  31  */
  32 char *drs_ObjectIdentifier_to_string(TALLOC_CTX *mem_ctx,
  33                                      struct drsuapi_DsReplicaObjectIdentifier *nc)
  34 {
  35         char *guid, *sid, *ret;
  36         guid = GUID_string(mem_ctx, &nc->guid);
  37         sid  = dom_sid_string(mem_ctx, &nc->sid);
  38         ret = talloc_asprintf(mem_ctx, "<GUID=%s>;<SID=%s>;%s",
  39                               guid, sid, nc->dn);
  40         talloc_free(guid);
  41         talloc_free(sid);
  42         return ret;
  43 }
  44
  45 int drsuapi_search_with_extended_dn(struct ldb_context *ldb,
  46                                     TALLOC_CTX *mem_ctx,
  47                                     struct ldb_result **_res,
  48                                     struct ldb_dn *basedn,
  49                                     enum ldb_scope scope,
  50                                     const char * const *attrs,
  51                                     const char *filter)
  52 {
  53         int ret;
  54         struct ldb_request *req;
  55         TALLOC_CTX *tmp_ctx;
  56         struct ldb_result *res;
  57
  58         tmp_ctx = talloc_new(mem_ctx);
  59
  60         res = talloc_zero(tmp_ctx, struct ldb_result);
  61         if (!res) {
  62                 return LDB_ERR_OPERATIONS_ERROR;
  63         }
  64
  65         ret = ldb_build_search_req(&req, ldb, tmp_ctx,
  66                                    basedn,
  67                                    scope,
  68                                    filter,
  69                                    attrs,
  70                                    NULL,
  71                                    res,
  72                                    ldb_search_default_callback,
  73                                    NULL);
  74         if (ret != LDB_SUCCESS) {
  75                 talloc_free(tmp_ctx);
  76                 return ret;
  77         }
  78
  79         ret = ldb_request_add_control(req, LDB_CONTROL_EXTENDED_DN_OID, true, NULL);
  80         if (ret != LDB_SUCCESS) {
  81                 return ret;
  82         }
  83
  84         ret = ldb_request_add_control(req, LDB_CONTROL_SHOW_DELETED_OID, true, NULL);
  85         if (ret != LDB_SUCCESS) {
  86                 return ret;
  87         }
  88
  89         ret = ldb_request_add_control(req, LDB_CONTROL_REVEAL_INTERNALS, false, NULL);
  90         if (ret != LDB_SUCCESS) {
  91                 return ret;
  92         }
  93
  94         ret = ldb_request(ldb, req);
  95         if (ret == LDB_SUCCESS) {
  96                 ret = ldb_wait(req->handle, LDB_WAIT_ALL);
  97         }
  98
  99         talloc_free(req);
 100         *_res = talloc_steal(mem_ctx, res);
 101         return ret;
 102 }
 103
 104 WERROR drs_security_level_check(struct dcesrv_call_state *dce_call,
 105                                 const char* call,
 106                                 enum security_user_level minimum_level,
 107                                 const struct dom_sid *domain_sid)
 108 {
 109         enum security_user_level level;
 110
 111         if (lpcfg_parm_bool(dce_call->conn->dce_ctx->lp_ctx, NULL,
 112                          "drs", "disable_sec_check", false)) {
 113                 return WERR_OK;
 114         }
 115
 116         level = security_session_user_level(dce_call->conn->auth_state.session_info, domain_sid);
 117         if (level < minimum_level) {
 118                 if (call) {
 119                         DEBUG(0,("%s refused for security token (level=%u)\n",
 120                                  call, (unsigned)level));
 121                         security_token_debug(2, dce_call->conn->auth_state.session_info->security_token);
 122                 }
 123                 return WERR_DS_DRA_ACCESS_DENIED;
 124         }
 125
 126         return WERR_OK;
 127 }
 128
 129 void drsuapi_process_secret_attribute(struct drsuapi_DsReplicaAttribute *attr,
 130                                       struct drsuapi_DsReplicaMetaData *meta_data)
 131 {
 132         if (attr->value_ctr.num_values == 0) {
 133                 return;
 134         }
 135
 136         switch (attr->attid) {
 137         case DRSUAPI_ATTRIBUTE_dBCSPwd:
 138         case DRSUAPI_ATTRIBUTE_unicodePwd:
 139         case DRSUAPI_ATTRIBUTE_ntPwdHistory:
 140         case DRSUAPI_ATTRIBUTE_lmPwdHistory:
 141         case DRSUAPI_ATTRIBUTE_supplementalCredentials:
 142         case DRSUAPI_ATTRIBUTE_priorValue:
 143         case DRSUAPI_ATTRIBUTE_currentValue:
 144         case DRSUAPI_ATTRIBUTE_trustAuthOutgoing:
 145         case DRSUAPI_ATTRIBUTE_trustAuthIncoming:
 146         case DRSUAPI_ATTRIBUTE_initialAuthOutgoing:
 147         case DRSUAPI_ATTRIBUTE_initialAuthIncoming:
 148                 /*set value to null*/
 149                 attr->value_ctr.num_values = 0;
 150                 talloc_free(attr->value_ctr.values);
 151                 attr->value_ctr.values = NULL;
 152                 meta_data->originating_change_time = 0;
 153                 return;
 154         default:
 155                 return;
 156         }
 157 }