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/ndr_wbint_c.h"
  23 #include "../libcli/security/security.h"
  24
  25 struct wb_gettoken_state {
  26         struct tevent_context *ev;
  27         struct dom_sid usersid;
  28         int num_sids;
  29         struct dom_sid *sids;
  30 };
  31
  32 static bool wb_add_rids_to_sids(TALLOC_CTX *mem_ctx,
  33                                 int *pnum_sids, struct dom_sid **psids,
  34                                 const struct dom_sid *domain_sid,
  35                                 int num_rids, uint32_t *rids);
  36
  37 static void wb_gettoken_gotgroups(struct tevent_req *subreq);
  38 static void wb_gettoken_gotlocalgroups(struct tevent_req *subreq);
  39 static void wb_gettoken_gotbuiltins(struct tevent_req *subreq);
  40
  41 struct tevent_req *wb_gettoken_send(TALLOC_CTX *mem_ctx,
  42                                     struct tevent_context *ev,
  43                                     const struct dom_sid *sid)
  44 {
  45         struct tevent_req *req, *subreq;
  46         struct wb_gettoken_state *state;
  47         struct winbindd_domain *domain;
  48
  49         req = tevent_req_create(mem_ctx, &state, struct wb_gettoken_state);
  50         if (req == NULL) {
  51                 return NULL;
  52         }
  53         sid_copy(&state->usersid, sid);
  54         state->ev = ev;
  55
  56         domain = find_domain_from_sid_noinit(sid);
  57         if (domain == NULL) {
  58                 DEBUG(5, ("Could not find domain from SID %s\n",
  59                           sid_string_dbg(sid)));
  60                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  61                 return tevent_req_post(req, ev);
  62         }
  63
  64         if (lp_winbind_trusted_domains_only() && domain->primary) {
  65                 DEBUG(7, ("wb_gettoken: My domain -- rejecting getgroups() "
  66                           "for %s.\n", sid_string_tos(sid)));
  67                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  68                 return tevent_req_post(req, ev);
  69         }
  70
  71         subreq = wb_lookupusergroups_send(state, ev, domain, &state->usersid);
  72         if (tevent_req_nomem(subreq, req)) {
  73                 return tevent_req_post(req, ev);
  74         }
  75         tevent_req_set_callback(subreq, wb_gettoken_gotgroups, req);
  76         return req;
  77 }
  78
  79 static void wb_gettoken_gotgroups(struct tevent_req *subreq)
  80 {
  81         struct tevent_req *req = tevent_req_callback_data(
  82                 subreq, struct tevent_req);
  83         struct wb_gettoken_state *state = tevent_req_data(
  84                 req, struct wb_gettoken_state);
  85         struct dom_sid *sids;
  86         struct winbindd_domain *domain;
  87         NTSTATUS status;
  88
  89         status = wb_lookupusergroups_recv(subreq, state, &state->num_sids,
  90                                           &state->sids);
  91         TALLOC_FREE(subreq);
  92         if (!NT_STATUS_IS_OK(status)) {
  93                 tevent_req_nterror(req, status);
  94                 return;
  95         }
  96
  97         sids = talloc_realloc(state, state->sids, struct dom_sid,
  98                               state->num_sids + 1);
  99         if (tevent_req_nomem(sids, req)) {
 100                 return;
 101         }
 102         memmove(&sids[1], &sids[0], state->num_sids * sizeof(sids[0]));
 103         sid_copy(&sids[0], &state->usersid);
 104         state->num_sids += 1;
 105         state->sids = sids;
 106
 107         /*
 108          * Expand our domain's aliases
 109          */
 110         domain = find_domain_from_sid_noinit(get_global_sam_sid());
 111         if (domain == NULL) {
 112                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 113                 return;
 114         }
 115
 116         subreq = wb_lookupuseraliases_send(state, state->ev, domain,
 117                                            state->num_sids, state->sids);
 118         if (tevent_req_nomem(subreq, req)) {
 119                 return;
 120         }
 121         tevent_req_set_callback(subreq, wb_gettoken_gotlocalgroups, req);
 122 }
 123
 124 static void wb_gettoken_gotlocalgroups(struct tevent_req *subreq)
 125 {
 126         struct tevent_req *req = tevent_req_callback_data(
 127                 subreq, struct tevent_req);
 128         struct wb_gettoken_state *state = tevent_req_data(
 129                 req, struct wb_gettoken_state);
 130         uint32_t num_rids;
 131         uint32_t *rids;
 132         struct winbindd_domain *domain;
 133         NTSTATUS status;
 134
 135         status = wb_lookupuseraliases_recv(subreq, state, &num_rids, &rids);
 136         TALLOC_FREE(subreq);
 137         if (!NT_STATUS_IS_OK(status)) {
 138                 tevent_req_nterror(req, status);
 139                 return;
 140         }
 141         domain = find_domain_from_sid_noinit(get_global_sam_sid());
 142         if (!wb_add_rids_to_sids(state, &state->num_sids, &state->sids,
 143                                  &domain->sid, num_rids, rids)) {
 144                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 145                 return;
 146         }
 147         TALLOC_FREE(rids);
 148
 149         /*
 150          * Now expand the builtin groups
 151          */
 152
 153         domain = find_builtin_domain();
 154         if (domain == NULL) {
 155                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 156                 return;
 157         }
 158
 159         subreq = wb_lookupuseraliases_send(state, state->ev, domain,
 160                                            state->num_sids, state->sids);
 161         if (tevent_req_nomem(subreq, req)) {
 162                 return;
 163         }
 164         tevent_req_set_callback(subreq, wb_gettoken_gotbuiltins, req);
 165 }
 166
 167 static void wb_gettoken_gotbuiltins(struct tevent_req *subreq)
 168 {
 169         struct tevent_req *req = tevent_req_callback_data(
 170                 subreq, struct tevent_req);
 171         struct wb_gettoken_state *state = tevent_req_data(
 172                 req, struct wb_gettoken_state);
 173         uint32_t num_rids;
 174         uint32_t *rids;
 175         NTSTATUS status;
 176
 177         status = wb_lookupuseraliases_recv(subreq, state, &num_rids, &rids);
 178         TALLOC_FREE(subreq);
 179         if (!NT_STATUS_IS_OK(status)) {
 180                 tevent_req_nterror(req, status);
 181                 return;
 182         }
 183         if (!wb_add_rids_to_sids(state, &state->num_sids, &state->sids,
 184                                  &global_sid_Builtin, num_rids, rids)) {
 185                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 186                 return;
 187         }
 188         tevent_req_done(req);
 189 }
 190
 191 NTSTATUS wb_gettoken_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 192                           int *num_sids, struct dom_sid **sids)
 193 {
 194         struct wb_gettoken_state *state = tevent_req_data(
 195                 req, struct wb_gettoken_state);
 196         NTSTATUS status;
 197
 198         if (tevent_req_is_nterror(req, &status)) {
 199                 return status;
 200         }
 201         *num_sids = state->num_sids;
 202         *sids = talloc_move(mem_ctx, &state->sids);
 203         return NT_STATUS_OK;
 204 }
 205
 206 static bool wb_add_rids_to_sids(TALLOC_CTX *mem_ctx,
 207                                 int *pnum_sids, struct dom_sid **psids,
 208                                 const struct dom_sid *domain_sid,
 209                                 int num_rids, uint32_t *rids)
 210 {
 211         struct dom_sid *sids;
 212         int i;
 213
 214         sids = talloc_realloc(mem_ctx, *psids, struct dom_sid,
 215                               *pnum_sids + num_rids);
 216         if (sids == NULL) {
 217                 return false;
 218         }
 219         for (i=0; i<num_rids; i++) {
 220                 sid_compose(&sids[i+*pnum_sids], domain_sid, rids[i]);
 221         }
 222
 223         *pnum_sids += num_rids;
 224         *psids = sids;
 225         return true;
 226 }