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 #include "passdb/lookup_sid.h" /* only for LOOKUP_NAME_NO_NSS flag */
  23
  24 struct winbindd_getgroups_state {
  25         struct tevent_context *ev;
  26         fstring domname;
  27         fstring username;
  28         struct dom_sid sid;
  29         enum lsa_SidType type;
  30         int num_sids;
  31         struct dom_sid *sids;
  32         int next_sid;
  33         int num_gids;
  34         gid_t *gids;
  35 };
  36
  37 static void winbindd_getgroups_lookupname_done(struct tevent_req *subreq);
  38 static void winbindd_getgroups_gettoken_done(struct tevent_req *subreq);
  39 static void winbindd_getgroups_sid2gid_done(struct tevent_req *subreq);
  40
  41 struct tevent_req *winbindd_getgroups_send(TALLOC_CTX *mem_ctx,
  42                                            struct tevent_context *ev,
  43                                            struct winbindd_cli_state *cli,
  44                                            struct winbindd_request *request)
  45 {
  46         struct tevent_req *req, *subreq;
  47         struct winbindd_getgroups_state *state;
  48         char *domuser, *mapped_user;
  49         NTSTATUS status;
  50
  51         req = tevent_req_create(mem_ctx, &state,
  52                                 struct winbindd_getgroups_state);
  53         if (req == NULL) {
  54                 return NULL;
  55         }
  56         state->ev = ev;
  57
  58         /* Ensure null termination */
  59         request->data.username[sizeof(request->data.username)-1]='\0';
  60
  61         DEBUG(3, ("getgroups %s\n", request->data.username));
  62
  63         domuser = request->data.username;
  64
  65         status = normalize_name_unmap(state, domuser, &mapped_user);
  66
  67         if (NT_STATUS_IS_OK(status)
  68             || NT_STATUS_EQUAL(status, NT_STATUS_FILE_RENAMED)) {
  69                 /* normalize_name_unmapped did something */
  70                 domuser = mapped_user;
  71         }
  72
  73         if (!parse_domain_user(domuser, state->domname, state->username)) {
  74                 DEBUG(5, ("Could not parse domain user: %s\n", domuser));
  75                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
  76                 return tevent_req_post(req, ev);
  77         }
  78
  79         subreq = wb_lookupname_send(state, ev, state->domname, state->username,
  80                                     LOOKUP_NAME_NO_NSS);
  81         if (tevent_req_nomem(subreq, req)) {
  82                 return tevent_req_post(req, ev);
  83         }
  84         tevent_req_set_callback(subreq, winbindd_getgroups_lookupname_done,
  85                                 req);
  86         return req;
  87 }
  88
  89 static void winbindd_getgroups_lookupname_done(struct tevent_req *subreq)
  90 {
  91         struct tevent_req *req = tevent_req_callback_data(
  92                 subreq, struct tevent_req);
  93         struct winbindd_getgroups_state *state = tevent_req_data(
  94                 req, struct winbindd_getgroups_state);
  95         NTSTATUS status;
  96
  97         status = wb_lookupname_recv(subreq, &state->sid, &state->type);
  98         TALLOC_FREE(subreq);
  99         if (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 (tevent_req_nterror(req, status)) {
 122                 return;
 123         }
 124
 125         /*
 126          * Convert the group SIDs to gids. state->sids[0] contains the user
 127          * sid, so start at index 1.
 128          */
 129
 130         state->gids = talloc_array(state, gid_t, state->num_sids-1);
 131         if (tevent_req_nomem(state->gids, req)) {
 132                 return;
 133         }
 134         state->num_gids = 0;
 135         state->next_sid = 1;
 136
 137         subreq = wb_sids2xids_send(state, state->ev,
 138                                    &state->sids[state->next_sid], 1);
 139         if (tevent_req_nomem(subreq, req)) {
 140                 return;
 141         }
 142         tevent_req_set_callback(subreq, winbindd_getgroups_sid2gid_done, req);
 143 }
 144
 145 static void winbindd_getgroups_sid2gid_done(struct tevent_req *subreq)
 146 {
 147         struct tevent_req *req = tevent_req_callback_data(
 148                 subreq, struct tevent_req);
 149         struct winbindd_getgroups_state *state = tevent_req_data(
 150                 req, struct winbindd_getgroups_state);
 151         NTSTATUS status;
 152         struct unixid xid;
 153
 154         xid.type = ID_TYPE_NOT_SPECIFIED;
 155         xid.id = UINT32_MAX;
 156
 157         status = wb_sids2xids_recv(subreq, &xid);
 158         TALLOC_FREE(subreq);
 159         if (xid.type == ID_TYPE_GID || xid.type == ID_TYPE_BOTH) {
 160                 state->gids[state->num_gids] = (gid_t)xid.id;
 161         } else {
 162                 state->gids[state->num_gids] = (uid_t)-1;
 163         }
 164
 165         /*
 166          * In case of failure, just continue with the next gid
 167          */
 168         if (NT_STATUS_IS_OK(status)) {
 169                 state->num_gids += 1;
 170         }
 171         state->next_sid += 1;
 172
 173         if (state->next_sid >= state->num_sids) {
 174                 tevent_req_done(req);
 175                 return;
 176         }
 177
 178         subreq = wb_sids2xids_send(state, state->ev,
 179                                    &state->sids[state->next_sid], 1);
 180         if (tevent_req_nomem(subreq, req)) {
 181                 return;
 182         }
 183         tevent_req_set_callback(subreq, winbindd_getgroups_sid2gid_done, req);
 184 }
 185
 186 NTSTATUS winbindd_getgroups_recv(struct tevent_req *req,
 187                                  struct winbindd_response *response)
 188 {
 189         struct winbindd_getgroups_state *state = tevent_req_data(
 190                 req, struct winbindd_getgroups_state);
 191         NTSTATUS status;
 192
 193         if (tevent_req_is_nterror(req, &status)) {
 194                 DEBUG(5, ("Could not convert sid %s: %s\n",
 195                           sid_string_dbg(&state->sid), nt_errstr(status)));
 196                 return status;
 197         }
 198
 199         response->data.num_entries = state->num_gids;
 200
 201         if (state->num_gids > 0) {
 202                 response->extra_data.data = talloc_move(response,
 203                                                         &state->gids);
 204                 response->length += state->num_gids * sizeof(gid_t);
 205         }
 206         return NT_STATUS_OK;
 207 }