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