source3/winbindd/winbindd_getgroups.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async implementation of WINBINDD_GETGROUPS
   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
  23 struct winbindd_getgroups_state {
  24         struct tevent_context *ev;
  25         fstring domname;
  26         fstring username;
  27         struct dom_sid sid;
  28         enum lsa_SidType type;
  29         int num_sids;
  30         struct dom_sid *sids;
  31         int next_sid;
  32         int num_gids;
  33         gid_t *gids;
  34 };
  35
  36 static void winbindd_getgroups_lookupname_done(struct tevent_req *subreq);
  37 static void winbindd_getgroups_gettoken_done(struct tevent_req *subreq);
  38 static void winbindd_getgroups_sid2gid_done(struct tevent_req *subreq);
  39
  40 struct tevent_req *winbindd_getgroups_send(TALLOC_CTX *mem_ctx,
  41                                            struct tevent_context *ev,
  42                                            struct winbindd_cli_state *cli,
  43                                            struct winbindd_request *request)
  44 {
  45         struct tevent_req *req, *subreq;
  46         struct winbindd_getgroups_state *state;
  47         char *domuser, *mapped_user;
  48         NTSTATUS status;
  49
  50         req = tevent_req_create(mem_ctx, &state,
  51                                 struct winbindd_getgroups_state);
  52         if (req == NULL) {
  53                 return NULL;
  54         }
  55         state->ev = ev;
  56
  57         /* Ensure null termination */
  58         request->data.username[sizeof(request->data.username)-1]='\0';
  59
  60         DEBUG(3, ("getgroups %s\n", request->data.username));
  61
  62         domuser = request->data.username;
  63
  64         status = normalize_name_unmap(state, domuser, &mapped_user);
  65
  66         if (NT_STATUS_IS_OK(status)
  67             || NT_STATUS_EQUAL(status, NT_STATUS_FILE_RENAMED)) {
  68                 /* normalize_name_unmapped did something */
  69                 domuser = mapped_user;
  70         }
  71
  72         if (!parse_domain_user(domuser, state->domname, state->username)) {
  73                 DEBUG(5, ("Could not parse domain user: %s\n", domuser));
  74                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
  75                 return tevent_req_post(req, ev);
  76         }
  77
  78         subreq = wb_lookupname_send(state, ev, state->domname, state->username,
  79                                     LOOKUP_NAME_NO_NSS);
  80         if (tevent_req_nomem(subreq, req)) {
  81                 return tevent_req_post(req, ev);
  82         }
  83         tevent_req_set_callback(subreq, winbindd_getgroups_lookupname_done,
  84                                 req);
  85         return req;
  86 }
  87
  88 static void winbindd_getgroups_lookupname_done(struct tevent_req *subreq)
  89 {
  90         struct tevent_req *req = tevent_req_callback_data(
  91                 subreq, struct tevent_req);
  92         struct winbindd_getgroups_state *state = tevent_req_data(
  93                 req, struct winbindd_getgroups_state);
  94         NTSTATUS status;
  95
  96         status = wb_lookupname_recv(subreq, &state->sid, &state->type);
  97         TALLOC_FREE(subreq);
  98         if (!NT_STATUS_IS_OK(status)) {
  99                 tevent_req_nterror(req, status);
 100                 return;
 101         }
 102
 103         subreq = wb_gettoken_send(state, state->ev, &state->sid);
 104         if (tevent_req_nomem(subreq, req)) {
 105                 return;
 106         }
 107         tevent_req_set_callback(subreq, winbindd_getgroups_gettoken_done, req);
 108 }
 109
 110 static void winbindd_getgroups_gettoken_done(struct tevent_req *subreq)
 111 {
 112         struct tevent_req *req = tevent_req_callback_data(
 113                 subreq, struct tevent_req);
 114         struct winbindd_getgroups_state *state = tevent_req_data(
 115                 req, struct winbindd_getgroups_state);
 116         NTSTATUS status;
 117
 118         status = wb_gettoken_recv(subreq, state, &state->num_sids,
 119                                   &state->sids);
 120         TALLOC_FREE(subreq);
 121         if (!NT_STATUS_IS_OK(status)) {
 122                 tevent_req_nterror(req, status);
 123                 return;
 124         }
 125
 126         /*
 127          * Convert the group SIDs to gids. state->sids[0] contains the user
 128          * sid, so start at index 1.
 129          */
 130
 131         state->gids = talloc_array(state, gid_t, state->num_sids-1);
 132         if (tevent_req_nomem(state->gids, req)) {
 133                 return;
 134         }
 135         state->num_gids = 0;
 136         state->next_sid = 1;
 137
 138         subreq = wb_sid2gid_send(state, state->ev,
 139                                  &state->sids[state->next_sid]);
 140         if (tevent_req_nomem(subreq, req)) {
 141                 return;
 142         }
 143         tevent_req_set_callback(subreq, winbindd_getgroups_sid2gid_done, req);
 144 }
 145
 146 static void winbindd_getgroups_sid2gid_done(struct tevent_req *subreq)
 147 {
 148         struct tevent_req *req = tevent_req_callback_data(
 149                 subreq, struct tevent_req);
 150         struct winbindd_getgroups_state *state = tevent_req_data(
 151                 req, struct winbindd_getgroups_state);
 152         NTSTATUS status;
 153
 154         status = wb_sid2gid_recv(subreq, &state->gids[state->num_gids]);
 155         TALLOC_FREE(subreq);
 156
 157         /*
 158          * In case of failure, just continue with the next gid
 159          */
 160         if (NT_STATUS_IS_OK(status)) {
 161                 state->num_gids += 1;
 162         }
 163         state->next_sid += 1;
 164
 165         if (state->next_sid >= state->num_sids) {
 166                 tevent_req_done(req);
 167                 return;
 168         }
 169
 170         subreq = wb_sid2gid_send(state, state->ev,
 171                                  &state->sids[state->next_sid]);
 172         if (tevent_req_nomem(subreq, req)) {
 173                 return;
 174         }
 175         tevent_req_set_callback(subreq, winbindd_getgroups_sid2gid_done, req);
 176 }
 177
 178 NTSTATUS winbindd_getgroups_recv(struct tevent_req *req,
 179                                  struct winbindd_response *response)
 180 {
 181         struct winbindd_getgroups_state *state = tevent_req_data(
 182                 req, struct winbindd_getgroups_state);
 183         NTSTATUS status;
 184
 185         if (tevent_req_is_nterror(req, &status)) {
 186                 DEBUG(5, ("Could not convert sid %s: %s\n",
 187                           sid_string_dbg(&state->sid), nt_errstr(status)));
 188                 return status;
 189         }
 190
 191         response->data.num_entries = state->num_gids;
 192
 193         if (state->num_gids > 0) {
 194                 response->extra_data.data = talloc_move(response,
 195                                                         &state->gids);
 196                 response->length += state->num_gids * sizeof(gid_t);
 197         }
 198         return NT_STATUS_OK;
 199 }