source3/winbindd/winbindd_sid_to_uid.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async implementation of WINBINDD_SID_TO_UID
   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 "../libcli/security/security.h"
  23
  24 struct winbindd_sid_to_uid_state {
  25         struct dom_sid sid;
  26         uid_t uid;
  27 };
  28
  29 static void winbindd_sid_to_uid_done(struct tevent_req *subreq);
  30
  31 struct tevent_req *winbindd_sid_to_uid_send(TALLOC_CTX *mem_ctx,
  32                                             struct tevent_context *ev,
  33                                             struct winbindd_cli_state *cli,
  34                                             struct winbindd_request *request)
  35 {
  36         struct tevent_req *req, *subreq;
  37         struct winbindd_sid_to_uid_state *state;
  38
  39         req = tevent_req_create(mem_ctx, &state,
  40                                 struct winbindd_sid_to_uid_state);
  41         if (req == NULL) {
  42                 return NULL;
  43         }
  44
  45         /* Ensure null termination */
  46         request->data.sid[sizeof(request->data.sid)-1]='\0';
  47
  48         DEBUG(3, ("sid to uid %s\n", request->data.sid));
  49
  50         if (!string_to_sid(&state->sid, request->data.sid)) {
  51                 DEBUG(1, ("Could not get convert sid %s from string\n",
  52                           request->data.sid));
  53                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
  54                 return tevent_req_post(req, ev);
  55         }
  56
  57         subreq = wb_sids2xids_send(state, ev, &state->sid, 1);
  58         if (tevent_req_nomem(subreq, req)) {
  59                 return tevent_req_post(req, ev);
  60         }
  61         tevent_req_set_callback(subreq, winbindd_sid_to_uid_done, req);
  62         return req;
  63 }
  64
  65 static void winbindd_sid_to_uid_done(struct tevent_req *subreq)
  66 {
  67         struct tevent_req *req = tevent_req_callback_data(
  68                 subreq, struct tevent_req);
  69         struct winbindd_sid_to_uid_state *state = tevent_req_data(
  70                 req, struct winbindd_sid_to_uid_state);
  71         NTSTATUS status;
  72         struct unixid xids[1];
  73
  74         status = wb_sids2xids_recv(subreq, xids, ARRAY_SIZE(xids));
  75         TALLOC_FREE(subreq);
  76         if (tevent_req_nterror(req, status)) {
  77                 return;
  78         }
  79
  80         /*
  81          * We are filtering further down in sids2xids, but that filtering
  82          * depends on the actual type of the sid handed in (as determined
  83          * by lookupsids). Here we need to filter for the type of object
  84          * actually requested, in this case uid.
  85          */
  86         if (!(xids[0].type == ID_TYPE_UID || xids[0].type == ID_TYPE_BOTH)) {
  87                 tevent_req_nterror(req, NT_STATUS_NONE_MAPPED);
  88                 return;
  89         }
  90
  91         state->uid = (uid_t)xids[0].id;
  92         tevent_req_done(req);
  93 }
  94
  95 NTSTATUS winbindd_sid_to_uid_recv(struct tevent_req *req,
  96                                   struct winbindd_response *response)
  97 {
  98         struct winbindd_sid_to_uid_state *state = tevent_req_data(
  99                 req, struct winbindd_sid_to_uid_state);
 100         NTSTATUS status;
 101
 102         if (tevent_req_is_nterror(req, &status)) {
 103                 DEBUG(5, ("Could not convert sid %s: %s\n",
 104                           sid_string_dbg(&state->sid), nt_errstr(status)));
 105                 return status;
 106         }
 107         response->data.uid = state->uid;
 108         return NT_STATUS_OK;
 109 }