source3/winbindd/wb_getgrsid.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async getgrsid
   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 "../libcli/security/security.h"
  24
  25 struct wb_getgrsid_state {
  26         struct tevent_context *ev;
  27         struct dom_sid sid;
  28         int max_nesting;
  29         const char *domname;
  30         const char *name;
  31         enum lsa_SidType type;
  32         gid_t gid;
  33         struct talloc_dict *members;
  34 };
  35
  36 static void wb_getgrsid_lookupsid_done(struct tevent_req *subreq);
  37 static void wb_getgrsid_sid2gid_done(struct tevent_req *subreq);
  38 static void wb_getgrsid_got_members(struct tevent_req *subreq);
  39
  40 struct tevent_req *wb_getgrsid_send(TALLOC_CTX *mem_ctx,
  41                                     struct tevent_context *ev,
  42                                     const struct dom_sid *group_sid,
  43                                     int max_nesting)
  44 {
  45         struct tevent_req *req, *subreq;
  46         struct wb_getgrsid_state *state;
  47
  48         req = tevent_req_create(mem_ctx, &state, struct wb_getgrsid_state);
  49         if (req == NULL) {
  50                 return NULL;
  51         }
  52         sid_copy(&state->sid, group_sid);
  53         state->ev = ev;
  54         state->max_nesting = max_nesting;
  55
  56         if (lp_winbind_trusted_domains_only()) {
  57                 struct winbindd_domain *our_domain = find_our_domain();
  58
  59                 if (dom_sid_compare_domain(group_sid, &our_domain->sid) == 0) {
  60                         DEBUG(7, ("winbindd_getgrsid: My domain -- rejecting "
  61                                   "getgrsid() for %s\n", sid_string_tos(group_sid)));
  62                         tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
  63                         return tevent_req_post(req, ev);
  64                 }
  65         }
  66
  67         subreq = wb_lookupsid_send(state, ev, &state->sid);
  68         if (tevent_req_nomem(subreq, req)) {
  69                 return tevent_req_post(req, ev);
  70         }
  71         tevent_req_set_callback(subreq, wb_getgrsid_lookupsid_done, req);
  72         return req;
  73 }
  74
  75 static void wb_getgrsid_lookupsid_done(struct tevent_req *subreq)
  76 {
  77         struct tevent_req *req = tevent_req_callback_data(
  78                 subreq, struct tevent_req);
  79         struct wb_getgrsid_state *state = tevent_req_data(
  80                 req, struct wb_getgrsid_state);
  81         NTSTATUS status;
  82
  83         status = wb_lookupsid_recv(subreq, state, &state->type,
  84                                    &state->domname, &state->name);
  85         TALLOC_FREE(subreq);
  86         if (!NT_STATUS_IS_OK(status)) {
  87                 tevent_req_nterror(req, status);
  88                 return;
  89         }
  90
  91         switch (state->type) {
  92         case SID_NAME_DOM_GRP:
  93         case SID_NAME_ALIAS:
  94         case SID_NAME_WKN_GRP:
  95                 break;
  96         default:
  97                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
  98                 return;
  99         }
 100
 101         subreq = wb_sid2gid_send(state, state->ev, &state->sid);
 102         if (tevent_req_nomem(subreq, req)) {
 103                 return;
 104         }
 105         tevent_req_set_callback(subreq, wb_getgrsid_sid2gid_done, req);
 106 }
 107
 108 static void wb_getgrsid_sid2gid_done(struct tevent_req *subreq)
 109 {
 110         struct tevent_req *req = tevent_req_callback_data(
 111                 subreq, struct tevent_req);
 112         struct wb_getgrsid_state *state = tevent_req_data(
 113                 req, struct wb_getgrsid_state);
 114         NTSTATUS status;
 115
 116         status = wb_sid2gid_recv(subreq, &state->gid);
 117         TALLOC_FREE(subreq);
 118         if (!NT_STATUS_IS_OK(status)) {
 119                 tevent_req_nterror(req, status);
 120                 return;
 121         }
 122         subreq = wb_group_members_send(state, state->ev, &state->sid,
 123                                        state->type, state->max_nesting);
 124         if (tevent_req_nomem(subreq, req)) {
 125                 return;
 126         }
 127         tevent_req_set_callback(subreq, wb_getgrsid_got_members, req);
 128 }
 129
 130 static void wb_getgrsid_got_members(struct tevent_req *subreq)
 131 {
 132         struct tevent_req *req = tevent_req_callback_data(
 133                 subreq, struct tevent_req);
 134         struct wb_getgrsid_state *state = tevent_req_data(
 135                 req, struct wb_getgrsid_state);
 136         NTSTATUS status;
 137
 138         status = wb_group_members_recv(subreq, state, &state->members);
 139         TALLOC_FREE(subreq);
 140         if (!NT_STATUS_IS_OK(status)) {
 141                 tevent_req_nterror(req, status);
 142                 return;
 143         }
 144         tevent_req_done(req);
 145 }
 146
 147 NTSTATUS wb_getgrsid_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 148                           const char **domname, const char **name, gid_t *gid,
 149                           struct talloc_dict **members)
 150 {
 151         struct wb_getgrsid_state *state = tevent_req_data(
 152                 req, struct wb_getgrsid_state);
 153         NTSTATUS status;
 154
 155         if (tevent_req_is_nterror(req, &status)) {
 156                 return status;
 157         }
 158         *domname = talloc_move(mem_ctx, &state->domname);
 159         *name = talloc_move(mem_ctx, &state->name);
 160         *gid = state->gid;
 161         *members = talloc_move(mem_ctx, &state->members);
 162         return NT_STATUS_OK;
 163 }