source3/winbindd/wb_uid2sid.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async uid2sid
   4    Copyright (C) Volker Lendecke 2009
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "winbindd.h"
  22 #include "librpc/gen_ndr/ndr_wbint_c.h"
  23 #include "idmap_cache.h"
  24 #include "idmap.h"
  25 #include "../libcli/security/security.h"
  26
  27 struct wb_uid2sid_state {
  28         struct tevent_context *ev;
  29         char *dom_name;
  30         struct dom_sid sid;
  31 };
  32
  33 static void wb_uid2sid_done(struct tevent_req *subreq);
  34
  35 struct tevent_req *wb_uid2sid_send(TALLOC_CTX *mem_ctx,
  36                                    struct tevent_context *ev,
  37                                    uid_t uid)
  38 {
  39         struct tevent_req *req, *subreq;
  40         struct wb_uid2sid_state *state;
  41         struct winbindd_domain *domain;
  42         struct winbindd_child *child;
  43         bool expired;
  44
  45         req = tevent_req_create(mem_ctx, &state, struct wb_uid2sid_state);
  46         if (req == NULL) {
  47                 return NULL;
  48         }
  49
  50         if (winbindd_use_idmap_cache()
  51             && idmap_cache_find_uid2sid(uid, &state->sid, &expired)) {
  52
  53                 DEBUG(10, ("idmap_cache_find_uid2sid found %d%s\n",
  54                            (int)uid, expired ? " (expired)": ""));
  55
  56                 if (!expired || idmap_is_offline()) {
  57                         if (is_null_sid(&state->sid)) {
  58                                 tevent_req_nterror(req,
  59                                                    NT_STATUS_NONE_MAPPED);
  60                         } else {
  61                                 tevent_req_done(req);
  62                         }
  63                         return tevent_req_post(req, ev);
  64                 }
  65         }
  66
  67         state->dom_name = NULL;
  68
  69         for (domain = domain_list(); domain != NULL; domain = domain->next) {
  70                 if (domain->have_idmap_config
  71                     && (uid >= domain->id_range_low)
  72                     && (uid <= domain->id_range_high)) {
  73                         state->dom_name = domain->name;
  74                         break;
  75                 }
  76         }
  77
  78         child = idmap_child();
  79
  80         subreq = dcerpc_wbint_Uid2Sid_send(
  81                 state, ev, child->binding_handle, state->dom_name,
  82                 uid, &state->sid);
  83         if (tevent_req_nomem(subreq, req)) {
  84                 return tevent_req_post(req, ev);
  85         }
  86         tevent_req_set_callback(subreq, wb_uid2sid_done, req);
  87         return req;
  88 }
  89
  90 static void wb_uid2sid_done(struct tevent_req *subreq)
  91 {
  92         struct tevent_req *req = tevent_req_callback_data(
  93                 subreq, struct tevent_req);
  94         struct wb_uid2sid_state *state = tevent_req_data(
  95                 req, struct wb_uid2sid_state);
  96         NTSTATUS status, result;
  97
  98         status = dcerpc_wbint_Uid2Sid_recv(subreq, state, &result);
  99         TALLOC_FREE(subreq);
 100         if (any_nt_status_not_ok(status, result, &status)) {
 101                 tevent_req_nterror(req, status);
 102                 return;
 103         }
 104         tevent_req_done(req);
 105 }
 106
 107 NTSTATUS wb_uid2sid_recv(struct tevent_req *req, struct dom_sid *sid)
 108 {
 109         struct wb_uid2sid_state *state = tevent_req_data(
 110                 req, struct wb_uid2sid_state);
 111         NTSTATUS status;
 112
 113         if (tevent_req_is_nterror(req, &status)) {
 114                 return status;
 115         }
 116         sid_copy(sid, &state->sid);
 117         return NT_STATUS_OK;
 118 }