source3/winbindd/winbindd_sids_to_xids.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async implementation of WINBINDD_SIDS_TO_XIDS
   4    Copyright (C) Volker Lendecke 2011
   5    Copyright (C) Michael Adam 2012
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "winbindd.h"
  23 #include "../libcli/security/security.h"
  24
  25
  26 struct winbindd_sids_to_xids_state {
  27         struct tevent_context *ev;
  28         struct dom_sid *sids;
  29         uint32_t num_sids;
  30         struct unixid *xids;
  31 };
  32
  33 static void winbindd_sids_to_xids_done(struct tevent_req *subreq);
  34
  35 struct tevent_req *winbindd_sids_to_xids_send(TALLOC_CTX *mem_ctx,
  36                                               struct tevent_context *ev,
  37                                               struct winbindd_cli_state *cli,
  38                                               struct winbindd_request *request)
  39 {
  40         struct tevent_req *req, *subreq;
  41         struct winbindd_sids_to_xids_state *state;
  42
  43         req = tevent_req_create(mem_ctx, &state,
  44                                 struct winbindd_sids_to_xids_state);
  45         if (req == NULL) {
  46                 return NULL;
  47         }
  48         state->ev = ev;
  49
  50         D_NOTICE("[%s (%u)] Winbind external command SIDS_TO_XIDS start.\n",
  51                  cli->client_name,
  52                  (unsigned int)cli->pid);
  53
  54         if (request->extra_len == 0) {
  55                 tevent_req_done(req);
  56                 return tevent_req_post(req, ev);
  57         }
  58         if (request->extra_data.data[request->extra_len-1] != '\0') {
  59                 D_DEBUG("Got invalid sids list\n");
  60                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
  61                 return tevent_req_post(req, ev);
  62         }
  63         if (!parse_sidlist(state, request->extra_data.data,
  64                            &state->sids, &state->num_sids)) {
  65                 D_DEBUG("parse_sidlist failed\n");
  66                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
  67                 return tevent_req_post(req, ev);
  68         }
  69
  70         D_DEBUG("Resolving %"PRIu32" SID(s).\n", state->num_sids);
  71
  72         subreq = wb_sids2xids_send(state, ev, state->sids, state->num_sids);
  73         if (tevent_req_nomem(subreq, req)) {
  74                 return tevent_req_post(req, ev);
  75         }
  76
  77         tevent_req_set_callback(subreq, winbindd_sids_to_xids_done, req);
  78         return req;
  79 }
  80
  81 static void winbindd_sids_to_xids_done(struct tevent_req *subreq)
  82 {
  83         struct tevent_req *req = tevent_req_callback_data(
  84                 subreq, struct tevent_req);
  85         struct winbindd_sids_to_xids_state *state = tevent_req_data(
  86                 req, struct winbindd_sids_to_xids_state);
  87         NTSTATUS status;
  88
  89         state->xids = talloc_zero_array(state, struct unixid, state->num_sids);
  90         if (tevent_req_nomem(state->xids, req)) {
  91                 return;
  92         }
  93
  94         status = wb_sids2xids_recv(subreq, state->xids, state->num_sids);
  95         TALLOC_FREE(subreq);
  96         if (tevent_req_nterror(req, status)) {
  97                 return;
  98         }
  99         tevent_req_done(req);
 100 }
 101
 102 NTSTATUS winbindd_sids_to_xids_recv(struct tevent_req *req,
 103                                     struct winbindd_response *response)
 104 {
 105         struct winbindd_sids_to_xids_state *state = tevent_req_data(
 106                 req, struct winbindd_sids_to_xids_state);
 107         NTSTATUS status;
 108         char *result = NULL;
 109         uint32_t i;
 110
 111         D_NOTICE("Winbind external command SIDS_TO_XIDS end.\n");
 112         if (tevent_req_is_nterror(req, &status)) {
 113                 D_WARNING("Could not convert sids: %s\n", nt_errstr(status));
 114                 return status;
 115         }
 116
 117         result = talloc_strdup(response, "");
 118
 119         for (i=0; i<state->num_sids; i++) {
 120                 char type = '\0';
 121                 bool found = true;
 122                 struct unixid xid;
 123
 124                 xid = state->xids[i];
 125
 126                 switch (xid.type) {
 127                 case ID_TYPE_UID:
 128                         type = 'U';
 129                         break;
 130                 case ID_TYPE_GID:
 131                         type = 'G';
 132                         break;
 133                 case ID_TYPE_BOTH:
 134                         type = 'B';
 135                         break;
 136                 default:
 137                         found = false;
 138                         break;
 139                 }
 140
 141                 if (xid.id == UINT32_MAX) {
 142                         found = false;
 143                 }
 144
 145                 if (found) {
 146                         talloc_asprintf_addbuf(
 147                                 &result,
 148                                 "%c%lu\n",
 149                                 type,
 150                                 (unsigned long)xid.id);
 151                 } else {
 152                         talloc_asprintf_addbuf(&result, "\n");
 153                 }
 154         }
 155
 156         if (result == NULL) {
 157                 return NT_STATUS_NO_MEMORY;
 158         }
 159
 160         response->extra_data.data = result;
 161         response->length += talloc_get_size(result);
 162
 163         return NT_STATUS_OK;
 164 }