source3/winbindd/wb_sid2gid.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async sid2gid
   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/cli_wbint.h"
  23
  24 struct wb_sid2gid_state {
  25         struct tevent_context *ev;
  26         struct dom_sid sid;
  27         char *dom_name;
  28         uint64 gid64;
  29         gid_t gid;
  30 };
  31
  32 static void wb_sid2gid_lookup_done(struct tevent_req *subreq);
  33 static void wb_sid2gid_done(struct tevent_req *subreq);
  34
  35
  36 struct tevent_req *wb_sid2gid_send(TALLOC_CTX *mem_ctx,
  37                                    struct tevent_context *ev,
  38                                    const struct dom_sid *sid)
  39 {
  40         struct tevent_req *req, *subreq;
  41         struct wb_sid2gid_state *state;
  42         bool expired;
  43
  44         req = tevent_req_create(mem_ctx, &state, struct wb_sid2gid_state);
  45         if (req == NULL) {
  46                 return NULL;
  47         }
  48         sid_copy(&state->sid, sid);
  49         state->ev = ev;
  50
  51         if (winbindd_use_idmap_cache()
  52             && idmap_cache_find_sid2gid(sid, &state->gid, &expired)) {
  53
  54                 DEBUG(10, ("idmap_cache_find_sid2gid found %d%s\n",
  55                            (int)state->gid, expired ? " (expired)": ""));
  56
  57                 if (!expired || IS_DOMAIN_OFFLINE(find_our_domain())) {
  58                         if (state->gid == -1) {
  59                                 tevent_req_nterror(req, NT_STATUS_NONE_MAPPED);
  60                         } else {
  61                                 tevent_req_done(req);
  62                         }
  63                         return tevent_req_post(req, ev);
  64                 }
  65         }
  66
  67         /*
  68          * We need to make sure the sid is of the right type to not flood
  69          * idmap with wrong entries
  70          */
  71
  72         subreq = wb_lookupsid_send(state, ev, &state->sid);
  73         if (tevent_req_nomem(subreq, req)) {
  74                 return tevent_req_post(req, ev);
  75         }
  76         tevent_req_set_callback(subreq, wb_sid2gid_lookup_done, req);
  77         return req;
  78 }
  79
  80 static void wb_sid2gid_lookup_done(struct tevent_req *subreq)
  81 {
  82         struct tevent_req *req = tevent_req_callback_data(
  83                 subreq, struct tevent_req);
  84         struct wb_sid2gid_state *state = tevent_req_data(
  85                 req, struct wb_sid2gid_state);
  86         struct winbindd_domain *domain;
  87         const char *domname;
  88         const char *name;
  89         enum lsa_SidType type;
  90         NTSTATUS status;
  91         struct winbindd_child *child;
  92
  93         status = wb_lookupsid_recv(subreq, talloc_tos(), &type, &domname,
  94                                    &name);
  95         if (!NT_STATUS_IS_OK(status)) {
  96                 tevent_req_nterror(req, status);
  97                 return;
  98         }
  99
 100         if ((type != SID_NAME_DOM_GRP) && (type != SID_NAME_ALIAS)
 101             && (type != SID_NAME_WKN_GRP)) {
 102                 DEBUG(5, ("Sid %s is not a group.\n",
 103                           sid_string_dbg(&state->sid)));
 104                 /*
 105                  * We have to set the cache ourselves here, the child
 106                  * which is normally responsible was not queried yet.
 107                  */
 108                 idmap_cache_set_sid2gid(&state->sid, -1);
 109                 tevent_req_nterror(req, NT_STATUS_INVALID_SID);
 110                 return;
 111         }
 112
 113         domain = find_domain_from_sid_noinit(&state->sid);
 114
 115         /*
 116          * TODO: Issue a gettrustinfo here in case we don't have "domain" yet?
 117          */
 118
 119         if ((domain != NULL) && domain->have_idmap_config) {
 120                 state->dom_name = domain->name;
 121         } else {
 122                 state->dom_name = NULL;
 123         }
 124
 125         child = idmap_child();
 126
 127         subreq = rpccli_wbint_Sid2Gid_send(state, state->ev, child->rpccli,
 128                                            state->dom_name, &state->sid,
 129                                            &state->gid64);
 130         if (tevent_req_nomem(subreq, req)) {
 131                 return;
 132         }
 133         tevent_req_set_callback(subreq, wb_sid2gid_done, req);
 134 }
 135
 136 static void wb_sid2gid_done(struct tevent_req *subreq)
 137 {
 138         struct tevent_req *req = tevent_req_callback_data(
 139                 subreq, struct tevent_req);
 140         struct wb_sid2gid_state *state = tevent_req_data(
 141                 req, struct wb_sid2gid_state);
 142         NTSTATUS status, result;
 143
 144         status = rpccli_wbint_Sid2Gid_recv(subreq, state, &result);
 145         TALLOC_FREE(subreq);
 146         if (!NT_STATUS_IS_OK(status)) {
 147                 tevent_req_nterror(req, status);
 148                 return;
 149         }
 150         if (!NT_STATUS_IS_OK(result)) {
 151                 tevent_req_nterror(req, result);
 152                 return;
 153         }
 154
 155         state->gid = state->gid64;
 156         tevent_req_done(req);
 157 }
 158
 159 NTSTATUS wb_sid2gid_recv(struct tevent_req *req, gid_t *gid)
 160 {
 161         struct wb_sid2gid_state *state = tevent_req_data(
 162                 req, struct wb_sid2gid_state);
 163         NTSTATUS status;
 164
 165         if (tevent_req_is_nterror(req, &status)) {
 166                 return status;
 167         }
 168         *gid = state->gid;
 169         return NT_STATUS_OK;
 170 }