source3/winbindd/wb_gettoken.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async gettoken
   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 "librpc/gen_ndr/cli_wbint.h"
  23
  24 struct wb_gettoken_state {
  25         struct tevent_context *ev;
  26         struct dom_sid usersid;
  27         int num_sids;
  28         struct dom_sid *sids;
  29 };
  30
  31 static bool wb_add_rids_to_sids(TALLOC_CTX *mem_ctx,
  32                                 int *pnum_sids, struct dom_sid **psids,
  33                                 const struct dom_sid *domain_sid,
  34                                 int num_rids, uint32_t *rids);
  35
  36 static void wb_gettoken_gotgroups(struct tevent_req *subreq);
  37 static void wb_gettoken_gotlocalgroups(struct tevent_req *subreq);
  38 static void wb_gettoken_gotbuiltins(struct tevent_req *subreq);
  39
  40 struct tevent_req *wb_gettoken_send(TALLOC_CTX *mem_ctx,
  41                                     struct tevent_context *ev,
  42                                     const struct dom_sid *sid)
  43 {
  44         struct tevent_req *req, *subreq;
  45         struct wb_gettoken_state *state;
  46         struct winbindd_domain *domain;
  47
  48         req = tevent_req_create(mem_ctx, &state, struct wb_gettoken_state);
  49         if (req == NULL) {
  50                 return NULL;
  51         }
  52         sid_copy(&state->usersid, sid);
  53         state->ev = ev;
  54
  55         domain = find_domain_from_sid_noinit(sid);
  56         if (domain == NULL) {
  57                 DEBUG(5, ("Could not find domain from SID %s\n",
  58                           sid_string_dbg(sid)));
  59                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  60                 return tevent_req_post(req, ev);
  61         }
  62
  63         if (lp_winbind_trusted_domains_only() && domain->primary) {
  64                 DEBUG(7, ("wb_gettoken: My domain -- rejecting getgroups() "
  65                           "for %s.\n", sid_string_tos(sid)));
  66                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  67                 return tevent_req_post(req, ev);
  68         }
  69
  70         subreq = wb_lookupusergroups_send(state, ev, domain, &state->usersid);
  71         if (tevent_req_nomem(subreq, req)) {
  72                 return tevent_req_post(req, ev);
  73         }
  74         tevent_req_set_callback(subreq, wb_gettoken_gotgroups, req);
  75         return req;
  76 }
  77
  78 static void wb_gettoken_gotgroups(struct tevent_req *subreq)
  79 {
  80         struct tevent_req *req = tevent_req_callback_data(
  81                 subreq, struct tevent_req);
  82         struct wb_gettoken_state *state = tevent_req_data(
  83                 req, struct wb_gettoken_state);
  84         struct dom_sid *sids;
  85         struct winbindd_domain *domain;
  86         NTSTATUS status;
  87
  88         status = wb_lookupusergroups_recv(subreq, state, &state->num_sids,
  89                                           &state->sids);
  90         TALLOC_FREE(subreq);
  91         if (!NT_STATUS_IS_OK(status)) {
  92                 tevent_req_nterror(req, status);
  93                 return;
  94         }
  95
  96         sids = talloc_realloc(state, state->sids, struct dom_sid,
  97                               state->num_sids + 1);
  98         if (tevent_req_nomem(sids, req)) {
  99                 return;
 100         }
 101         memmove(&sids[1], &sids[0], state->num_sids * sizeof(sids[0]));
 102         sid_copy(&sids[0], &state->usersid);
 103         state->num_sids += 1;
 104         state->sids = sids;
 105
 106         /*
 107          * Expand our domain's aliases
 108          */
 109         domain = find_domain_from_sid_noinit(get_global_sam_sid());
 110         if (domain == NULL) {
 111                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 112                 return;
 113         }
 114
 115         subreq = wb_lookupuseraliases_send(state, state->ev, domain,
 116                                            state->num_sids, state->sids);
 117         if (tevent_req_nomem(subreq, req)) {
 118                 return;
 119         }
 120         tevent_req_set_callback(subreq, wb_gettoken_gotlocalgroups, req);
 121 }
 122
 123 static void wb_gettoken_gotlocalgroups(struct tevent_req *subreq)
 124 {
 125         struct tevent_req *req = tevent_req_callback_data(
 126                 subreq, struct tevent_req);
 127         struct wb_gettoken_state *state = tevent_req_data(
 128                 req, struct wb_gettoken_state);
 129         uint32_t num_rids;
 130         uint32_t *rids;
 131         struct winbindd_domain *domain;
 132         NTSTATUS status;
 133
 134         status = wb_lookupuseraliases_recv(subreq, state, &num_rids, &rids);
 135         TALLOC_FREE(subreq);
 136         if (!NT_STATUS_IS_OK(status)) {
 137                 tevent_req_nterror(req, status);
 138                 return;
 139         }
 140         domain = find_domain_from_sid_noinit(get_global_sam_sid());
 141         if (!wb_add_rids_to_sids(state, &state->num_sids, &state->sids,
 142                                  &domain->sid, num_rids, rids)) {
 143                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 144                 return;
 145         }
 146         TALLOC_FREE(rids);
 147
 148         /*
 149          * Now expand the builtin groups
 150          */
 151
 152         domain = find_builtin_domain();
 153         if (domain == NULL) {
 154                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 155                 return;
 156         }
 157
 158         subreq = wb_lookupuseraliases_send(state, state->ev, domain,
 159                                            state->num_sids, state->sids);
 160         if (tevent_req_nomem(subreq, req)) {
 161                 return;
 162         }
 163         tevent_req_set_callback(subreq, wb_gettoken_gotbuiltins, req);
 164 }
 165
 166 static void wb_gettoken_gotbuiltins(struct tevent_req *subreq)
 167 {
 168         struct tevent_req *req = tevent_req_callback_data(
 169                 subreq, struct tevent_req);
 170         struct wb_gettoken_state *state = tevent_req_data(
 171                 req, struct wb_gettoken_state);
 172         uint32_t num_rids;
 173         uint32_t *rids;
 174         NTSTATUS status;
 175
 176         status = wb_lookupuseraliases_recv(subreq, state, &num_rids, &rids);
 177         TALLOC_FREE(subreq);
 178         if (!NT_STATUS_IS_OK(status)) {
 179                 tevent_req_nterror(req, status);
 180                 return;
 181         }
 182         if (!wb_add_rids_to_sids(state, &state->num_sids, &state->sids,
 183                                  &global_sid_Builtin, num_rids, rids)) {
 184                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 185                 return;
 186         }
 187         tevent_req_done(req);
 188 }
 189
 190 NTSTATUS wb_gettoken_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 191                           int *num_sids, struct dom_sid **sids)
 192 {
 193         struct wb_gettoken_state *state = tevent_req_data(
 194                 req, struct wb_gettoken_state);
 195         NTSTATUS status;
 196
 197         if (tevent_req_is_nterror(req, &status)) {
 198                 return status;
 199         }
 200         *num_sids = state->num_sids;
 201         *sids = talloc_move(mem_ctx, &state->sids);
 202         return NT_STATUS_OK;
 203 }
 204
 205 static bool wb_add_rids_to_sids(TALLOC_CTX *mem_ctx,
 206                                 int *pnum_sids, struct dom_sid **psids,
 207                                 const struct dom_sid *domain_sid,
 208                                 int num_rids, uint32_t *rids)
 209 {
 210         struct dom_sid *sids;
 211         int i;
 212
 213         sids = talloc_realloc(mem_ctx, *psids, struct dom_sid,
 214                               *pnum_sids + num_rids);
 215         if (sids == NULL) {
 216                 return false;
 217         }
 218         for (i=0; i<num_rids; i++) {
 219                 sid_compose(&sids[i+*pnum_sids], domain_sid, rids[i]);
 220         }
 221
 222         *pnum_sids += num_rids;
 223         *psids = sids;
 224         return true;
 225 }