source3/winbindd/winbindd_getgrnam.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async implementation of WINBINDD_GETGRNAM
   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_getgrnam_state {
  24         struct tevent_context *ev;
  25         fstring name_namespace, name_domain, name_group;
  26         struct dom_sid sid;
  27         const char *domname;
  28         const char *name;
  29         gid_t gid;
  30         struct db_context *members;
  31 };
  32
  33 static void winbindd_getgrnam_lookupname_done(struct tevent_req *subreq);
  34 static void winbindd_getgrnam_done(struct tevent_req *subreq);
  35
  36 struct tevent_req *winbindd_getgrnam_send(TALLOC_CTX *mem_ctx,
  37                                           struct tevent_context *ev,
  38                                           struct winbindd_cli_state *cli,
  39                                           struct winbindd_request *request)
  40 {
  41         struct tevent_req *req, *subreq;
  42         struct winbindd_getgrnam_state *state;
  43         char *tmp;
  44         NTSTATUS nt_status;
  45         bool ok;
  46
  47         req = tevent_req_create(mem_ctx, &state,
  48                                 struct winbindd_getgrnam_state);
  49         if (req == NULL) {
  50                 return NULL;
  51         }
  52         state->ev = ev;
  53
  54         /* Ensure null termination */
  55         request->data.groupname[sizeof(request->data.groupname)-1]='\0';
  56
  57         DBG_NOTICE("[%s (%u)] getgrnam %s\n",
  58                    cli->client_name,
  59                    (unsigned int)cli->pid,
  60                    request->data.groupname);
  61
  62         nt_status = normalize_name_unmap(state, request->data.groupname, &tmp);
  63         /* If we didn't map anything in the above call, just reset the
  64            tmp pointer to the original string */
  65         if (!NT_STATUS_IS_OK(nt_status) &&
  66             !NT_STATUS_EQUAL(nt_status, NT_STATUS_FILE_RENAMED))
  67         {
  68                 tmp = request->data.groupname;
  69         }
  70
  71         /* Parse domain and groupname */
  72
  73         ok = parse_domain_user(tmp,
  74                                state->name_namespace,
  75                                state->name_domain,
  76                                state->name_group);
  77         if (!ok) {
  78                 DBG_INFO("Could not parse domain user: %s\n", tmp);
  79                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
  80                 return tevent_req_post(req, ev);
  81         }
  82
  83         /* if no domain or our local domain and no local tdb group, default to
  84          * our local domain for aliases */
  85
  86         if ( !*(state->name_domain) || strequal(state->name_domain,
  87                                                 get_global_sam_name()) ) {
  88                 fstrcpy(state->name_domain, get_global_sam_name());
  89         }
  90
  91         subreq = wb_lookupname_send(state, ev,
  92                                     state->name_namespace,
  93                                     state->name_domain,
  94                                     state->name_group,
  95                                     0);
  96         if (tevent_req_nomem(subreq, req)) {
  97                 return tevent_req_post(req, ev);
  98         }
  99         tevent_req_set_callback(subreq, winbindd_getgrnam_lookupname_done,
 100                                 req);
 101         return req;
 102 }
 103
 104 static void winbindd_getgrnam_lookupname_done(struct tevent_req *subreq)
 105 {
 106         struct tevent_req *req = tevent_req_callback_data(
 107                 subreq, struct tevent_req);
 108         struct winbindd_getgrnam_state *state = tevent_req_data(
 109                 req, struct winbindd_getgrnam_state);
 110         enum lsa_SidType type;
 111         NTSTATUS status;
 112
 113         status = wb_lookupname_recv(subreq, &state->sid, &type);
 114         TALLOC_FREE(subreq);
 115         if (tevent_req_nterror(req, status)) {
 116                 return;
 117         }
 118
 119         switch (type) {
 120         case SID_NAME_DOM_GRP:
 121         case SID_NAME_ALIAS:
 122         case SID_NAME_WKN_GRP:
 123         /*
 124          * Also give user types a chance:
 125          * These might be user sids mapped to the ID_TYPE_BOTH,
 126          * and in that case we should construct a group struct.
 127          */
 128         case SID_NAME_USER:
 129         case SID_NAME_COMPUTER:
 130                 break;
 131         default:
 132                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
 133                 return;
 134         }
 135
 136         subreq = wb_getgrsid_send(state, state->ev, &state->sid,
 137                                   lp_winbind_expand_groups());
 138         if (tevent_req_nomem(subreq, req)) {
 139                 return;
 140         }
 141         tevent_req_set_callback(subreq, winbindd_getgrnam_done, req);
 142 }
 143
 144 static void winbindd_getgrnam_done(struct tevent_req *subreq)
 145 {
 146         struct tevent_req *req = tevent_req_callback_data(
 147                 subreq, struct tevent_req);
 148         struct winbindd_getgrnam_state *state = tevent_req_data(
 149                 req, struct winbindd_getgrnam_state);
 150         NTSTATUS status;
 151
 152         status = wb_getgrsid_recv(subreq, state, &state->domname, &state->name,
 153                                   &state->gid, &state->members);
 154         TALLOC_FREE(subreq);
 155         if (tevent_req_nterror(req, status)) {
 156                 return;
 157         }
 158         tevent_req_done(req);
 159 }
 160
 161 NTSTATUS winbindd_getgrnam_recv(struct tevent_req *req,
 162                                 struct winbindd_response *response)
 163 {
 164         struct winbindd_getgrnam_state *state = tevent_req_data(
 165                 req, struct winbindd_getgrnam_state);
 166         NTSTATUS status;
 167         int num_members;
 168         char *buf;
 169
 170         if (tevent_req_is_nterror(req, &status)) {
 171                 DEBUG(5, ("Could not convert sid %s: %s\n",
 172                           sid_string_dbg(&state->sid), nt_errstr(status)));
 173                 return status;
 174         }
 175
 176         if (!fill_grent(talloc_tos(), &response->data.gr, state->domname,
 177                         state->name, state->gid)) {
 178                 DEBUG(5, ("fill_grent failed\n"));
 179                 return NT_STATUS_NO_MEMORY;
 180         }
 181
 182         status = winbindd_print_groupmembers(state->members, response,
 183                                              &num_members, &buf);
 184         if (!NT_STATUS_IS_OK(status)) {
 185                 return status;
 186         }
 187
 188         response->data.gr.num_gr_mem = (uint32_t)num_members;
 189
 190         /* Group membership lives at start of extra data */
 191
 192         response->data.gr.gr_mem_ofs = 0;
 193         response->extra_data.data = buf;
 194         response->length += talloc_get_size(response->extra_data.data);
 195
 196         return NT_STATUS_OK;
 197 }