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 (tevent_req_nterror(req, status)) {
  87                 return;
  88         }
  89
  90         switch (state->type) {
  91         case SID_NAME_DOM_GRP:
  92         case SID_NAME_ALIAS:
  93         case SID_NAME_WKN_GRP:
  94                 break;
  95         default:
  96                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
  97                 return;
  98         }
  99
 100         subreq = wb_sids2xids_send(state, state->ev, &state->sid, 1);
 101         if (tevent_req_nomem(subreq, req)) {
 102                 return;
 103         }
 104         tevent_req_set_callback(subreq, wb_getgrsid_sid2gid_done, req);
 105 }
 106
 107 static void wb_getgrsid_sid2gid_done(struct tevent_req *subreq)
 108 {
 109         struct tevent_req *req = tevent_req_callback_data(
 110                 subreq, struct tevent_req);
 111         struct wb_getgrsid_state *state = tevent_req_data(
 112                 req, struct wb_getgrsid_state);
 113         NTSTATUS status;
 114         struct unixid xid;
 115
 116         status = wb_sids2xids_recv(subreq, &xid);
 117         TALLOC_FREE(subreq);
 118         if (tevent_req_nterror(req, status)) {
 119                 return;
 120         }
 121
 122         /*
 123          * We are filtering further down in sids2xids, but that filtering
 124          * depends on the actual type of the sid handed in (as determined
 125          * by lookupsids). Here we need to filter for the type of object
 126          * actually requested, in this case uid.
 127          */
 128         if (!(xid.type == ID_TYPE_GID || xid.type == ID_TYPE_BOTH)) {
 129                 tevent_req_nterror(req, NT_STATUS_NONE_MAPPED);
 130                 return;
 131         }
 132
 133         state->gid = (gid_t)xid.id;
 134
 135         subreq = wb_group_members_send(state, state->ev, &state->sid,
 136                                        state->type, state->max_nesting);
 137         if (tevent_req_nomem(subreq, req)) {
 138                 return;
 139         }
 140         tevent_req_set_callback(subreq, wb_getgrsid_got_members, req);
 141 }
 142
 143 static void wb_getgrsid_got_members(struct tevent_req *subreq)
 144 {
 145         struct tevent_req *req = tevent_req_callback_data(
 146                 subreq, struct tevent_req);
 147         struct wb_getgrsid_state *state = tevent_req_data(
 148                 req, struct wb_getgrsid_state);
 149         NTSTATUS status;
 150
 151         status = wb_group_members_recv(subreq, state, &state->members);
 152         TALLOC_FREE(subreq);
 153         if (tevent_req_nterror(req, status)) {
 154                 return;
 155         }
 156         tevent_req_done(req);
 157 }
 158
 159 NTSTATUS wb_getgrsid_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 160                           const char **domname, const char **name, gid_t *gid,
 161                           struct talloc_dict **members)
 162 {
 163         struct wb_getgrsid_state *state = tevent_req_data(
 164                 req, struct wb_getgrsid_state);
 165         NTSTATUS status;
 166
 167         if (tevent_req_is_nterror(req, &status)) {
 168                 return status;
 169         }
 170         *domname = talloc_move(mem_ctx, &state->domname);
 171         *name = talloc_move(mem_ctx, &state->name);
 172         *gid = state->gid;
 173         *members = talloc_move(mem_ctx, &state->members);
 174         return NT_STATUS_OK;
 175 }