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         struct winbindd_domain *domain;
  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         domain = find_domain_from_name_noinit(state->domname);
  80         if (domain == NULL) {
  81                 /* Retry with DNS name */
  82                 char *p = strchr(domuser, '@');
  83                 if (p != NULL) {
  84                         domain = find_domain_from_name_noinit(p+1);
  85                 }
  86         }
  87         if (domain == NULL) {
  88                 DEBUG(7, ("could not find domain entry for domain %s\n",
  89                           state->domname));
  90                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  91                 return tevent_req_post(req, ev);
  92         }
  93
  94         if (lp_winbind_trusted_domains_only() && domain->primary) {
  95                 DEBUG(7,("winbindd_getgroups: My domain -- "
  96                          "rejecting getgroups() for %s\\%s.\n",
  97                          state->domname, state->username));
  98                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  99                 return tevent_req_post(req, ev);
 100         }
 101
 102         subreq = wb_lookupname_send(state, ev, state->domname, state->username,
 103                                     LOOKUP_NAME_NO_NSS);
 104         if (tevent_req_nomem(subreq, req)) {
 105                 return tevent_req_post(req, ev);
 106         }
 107         tevent_req_set_callback(subreq, winbindd_getgroups_lookupname_done,
 108                                 req);
 109         return req;
 110 }
 111
 112 static void winbindd_getgroups_lookupname_done(struct tevent_req *subreq)
 113 {
 114         struct tevent_req *req = tevent_req_callback_data(
 115                 subreq, struct tevent_req);
 116         struct winbindd_getgroups_state *state = tevent_req_data(
 117                 req, struct winbindd_getgroups_state);
 118         NTSTATUS status;
 119
 120         status = wb_lookupname_recv(subreq, &state->sid, &state->type);
 121         TALLOC_FREE(subreq);
 122         if (!NT_STATUS_IS_OK(status)) {
 123                 tevent_req_nterror(req, status);
 124                 return;
 125         }
 126
 127         subreq = wb_gettoken_send(state, state->ev, &state->sid);
 128         if (tevent_req_nomem(subreq, req)) {
 129                 return;
 130         }
 131         tevent_req_set_callback(subreq, winbindd_getgroups_gettoken_done, req);
 132 }
 133
 134 static void winbindd_getgroups_gettoken_done(struct tevent_req *subreq)
 135 {
 136         struct tevent_req *req = tevent_req_callback_data(
 137                 subreq, struct tevent_req);
 138         struct winbindd_getgroups_state *state = tevent_req_data(
 139                 req, struct winbindd_getgroups_state);
 140         NTSTATUS status;
 141
 142         status = wb_gettoken_recv(subreq, state, &state->num_sids,
 143                                   &state->sids);
 144         TALLOC_FREE(subreq);
 145         if (!NT_STATUS_IS_OK(status)) {
 146                 tevent_req_nterror(req, status);
 147                 return;
 148         }
 149
 150         /*
 151          * Convert the group SIDs to gids. state->sids[0] contains the user
 152          * sid, so start at index 1.
 153          */
 154
 155         state->gids = talloc_array(state, gid_t, state->num_sids-1);
 156         if (tevent_req_nomem(state->gids, req)) {
 157                 return;
 158         }
 159         state->num_gids = 0;
 160         state->next_sid = 1;
 161
 162         subreq = wb_sid2gid_send(state, state->ev,
 163                                  &state->sids[state->next_sid]);
 164         if (tevent_req_nomem(subreq, req)) {
 165                 return;
 166         }
 167         tevent_req_set_callback(subreq, winbindd_getgroups_sid2gid_done, req);
 168 }
 169
 170 static void winbindd_getgroups_sid2gid_done(struct tevent_req *subreq)
 171 {
 172         struct tevent_req *req = tevent_req_callback_data(
 173                 subreq, struct tevent_req);
 174         struct winbindd_getgroups_state *state = tevent_req_data(
 175                 req, struct winbindd_getgroups_state);
 176         NTSTATUS status;
 177
 178         status = wb_sid2gid_recv(subreq, &state->gids[state->num_gids]);
 179         TALLOC_FREE(subreq);
 180
 181         /*
 182          * In case of failure, just continue with the next gid
 183          */
 184         if (NT_STATUS_IS_OK(status)) {
 185                 state->num_gids += 1;
 186         }
 187         state->next_sid += 1;
 188
 189         if (state->next_sid >= state->num_sids) {
 190                 tevent_req_done(req);
 191                 return;
 192         }
 193
 194         subreq = wb_sid2gid_send(state, state->ev,
 195                                  &state->sids[state->next_sid]);
 196         if (tevent_req_nomem(subreq, req)) {
 197                 return;
 198         }
 199         tevent_req_set_callback(subreq, winbindd_getgroups_sid2gid_done, req);
 200 }
 201
 202 NTSTATUS winbindd_getgroups_recv(struct tevent_req *req,
 203                                  struct winbindd_response *response)
 204 {
 205         struct winbindd_getgroups_state *state = tevent_req_data(
 206                 req, struct winbindd_getgroups_state);
 207         NTSTATUS status;
 208
 209         if (tevent_req_is_nterror(req, &status)) {
 210                 DEBUG(5, ("Could not convert sid %s: %s\n",
 211                           sid_string_dbg(&state->sid), nt_errstr(status)));
 212                 return status;
 213         }
 214
 215         response->data.num_entries = state->num_gids;
 216
 217         if (state->num_gids > 0) {
 218                 response->extra_data.data = talloc_move(response,
 219                                                         &state->gids);
 220                 response->length += state->num_gids * sizeof(gid_t);
 221         }
 222         return NT_STATUS_OK;
 223 }