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_winbind_c.h"
  23 #include "../libcli/security/security.h"
  24 #include "passdb/machine_sid.h"
  25
  26 struct wb_gettoken_state {
  27         struct tevent_context *ev;
  28         struct dom_sid usersid;
  29         int num_sids;
  30         struct dom_sid *sids;
  31 };
  32
  33 static bool wb_add_rids_to_sids(TALLOC_CTX *mem_ctx,
  34                                 int *pnum_sids, struct dom_sid **psids,
  35                                 const struct dom_sid *domain_sid,
  36                                 int num_rids, uint32_t *rids);
  37
  38 static void wb_gettoken_gotgroups(struct tevent_req *subreq);
  39 static void wb_gettoken_gotlocalgroups(struct tevent_req *subreq);
  40 static void wb_gettoken_gotbuiltins(struct tevent_req *subreq);
  41
  42 struct tevent_req *wb_gettoken_send(TALLOC_CTX *mem_ctx,
  43                                     struct tevent_context *ev,
  44                                     const struct dom_sid *sid)
  45 {
  46         struct tevent_req *req, *subreq;
  47         struct wb_gettoken_state *state;
  48         struct winbindd_domain *domain;
  49
  50         req = tevent_req_create(mem_ctx, &state, struct wb_gettoken_state);
  51         if (req == NULL) {
  52                 return NULL;
  53         }
  54         sid_copy(&state->usersid, sid);
  55         state->ev = ev;
  56
  57         domain = find_domain_from_sid_noinit(sid);
  58         if (domain == NULL) {
  59                 DEBUG(5, ("Could not find domain from SID %s\n",
  60                           sid_string_dbg(sid)));
  61                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  62                 return tevent_req_post(req, ev);
  63         }
  64
  65         if (lp_winbind_trusted_domains_only() && domain->primary) {
  66                 DEBUG(7, ("wb_gettoken: My domain -- rejecting getgroups() "
  67                           "for %s.\n", sid_string_tos(sid)));
  68                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  69                 return tevent_req_post(req, ev);
  70         }
  71
  72         subreq = wb_lookupusergroups_send(state, ev, domain, &state->usersid);
  73         if (tevent_req_nomem(subreq, req)) {
  74                 return tevent_req_post(req, ev);
  75         }
  76         tevent_req_set_callback(subreq, wb_gettoken_gotgroups, req);
  77         return req;
  78 }
  79
  80 static void wb_gettoken_gotgroups(struct tevent_req *subreq)
  81 {
  82         struct tevent_req *req = tevent_req_callback_data(
  83                 subreq, struct tevent_req);
  84         struct wb_gettoken_state *state = tevent_req_data(
  85                 req, struct wb_gettoken_state);
  86         struct dom_sid *sids;
  87         struct winbindd_domain *domain;
  88         NTSTATUS status;
  89
  90         status = wb_lookupusergroups_recv(subreq, state, &state->num_sids,
  91                                           &state->sids);
  92         TALLOC_FREE(subreq);
  93         if (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 (tevent_req_nterror(req, status)) {
 138                 return;
 139         }
 140         domain = find_domain_from_sid_noinit(get_global_sam_sid());
 141         if (domain == NULL) {
 142                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 143                 return;
 144         }
 145         if (!wb_add_rids_to_sids(state, &state->num_sids, &state->sids,
 146                                  &domain->sid, num_rids, rids)) {
 147                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 148                 return;
 149         }
 150         TALLOC_FREE(rids);
 151
 152         /*
 153          * Now expand the builtin groups
 154          */
 155
 156         domain = find_builtin_domain();
 157         if (domain == NULL) {
 158                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 159                 return;
 160         }
 161
 162         subreq = wb_lookupuseraliases_send(state, state->ev, domain,
 163                                            state->num_sids, state->sids);
 164         if (tevent_req_nomem(subreq, req)) {
 165                 return;
 166         }
 167         tevent_req_set_callback(subreq, wb_gettoken_gotbuiltins, req);
 168 }
 169
 170 static void wb_gettoken_gotbuiltins(struct tevent_req *subreq)
 171 {
 172         struct tevent_req *req = tevent_req_callback_data(
 173                 subreq, struct tevent_req);
 174         struct wb_gettoken_state *state = tevent_req_data(
 175                 req, struct wb_gettoken_state);
 176         uint32_t num_rids;
 177         uint32_t *rids;
 178         NTSTATUS status;
 179
 180         status = wb_lookupuseraliases_recv(subreq, state, &num_rids, &rids);
 181         TALLOC_FREE(subreq);
 182         if (tevent_req_nterror(req, status)) {
 183                 return;
 184         }
 185         if (!wb_add_rids_to_sids(state, &state->num_sids, &state->sids,
 186                                  &global_sid_Builtin, num_rids, rids)) {
 187                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 188                 return;
 189         }
 190         tevent_req_done(req);
 191 }
 192
 193 NTSTATUS wb_gettoken_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 194                           int *num_sids, struct dom_sid **sids)
 195 {
 196         struct wb_gettoken_state *state = tevent_req_data(
 197                 req, struct wb_gettoken_state);
 198         NTSTATUS status;
 199
 200         if (tevent_req_is_nterror(req, &status)) {
 201                 return status;
 202         }
 203         *num_sids = state->num_sids;
 204         *sids = talloc_move(mem_ctx, &state->sids);
 205         return NT_STATUS_OK;
 206 }
 207
 208 static bool wb_add_rids_to_sids(TALLOC_CTX *mem_ctx,
 209                                 int *pnum_sids, struct dom_sid **psids,
 210                                 const struct dom_sid *domain_sid,
 211                                 int num_rids, uint32_t *rids)
 212 {
 213         struct dom_sid *sids;
 214         int i;
 215
 216         sids = talloc_realloc(mem_ctx, *psids, struct dom_sid,
 217                               *pnum_sids + num_rids);
 218         if (sids == NULL) {
 219                 return false;
 220         }
 221         for (i=0; i<num_rids; i++) {
 222                 sid_compose(&sids[i+*pnum_sids], domain_sid, rids[i]);
 223         }
 224
 225         *pnum_sids += num_rids;
 226         *psids = sids;
 227         return true;
 228 }