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 "util/debug.h"
  22 #include "winbindd.h"
  23 #include "librpc/gen_ndr/ndr_winbind_c.h"
  24 #include "../libcli/security/security.h"
  25 #include "passdb/machine_sid.h"
  26
  27 struct wb_gettoken_state {
  28         struct tevent_context *ev;
  29         struct dom_sid usersid;
  30         bool expand_local_aliases;
  31         uint32_t num_sids;
  32         struct dom_sid *sids;
  33 };
  34
  35 static NTSTATUS wb_add_rids_to_sids(TALLOC_CTX *mem_ctx,
  36                                     uint32_t *pnum_sids,
  37                                     struct dom_sid **psids,
  38                                     const struct dom_sid *domain_sid,
  39                                     uint32_t num_rids, uint32_t *rids);
  40
  41 static void wb_gettoken_gotuser(struct tevent_req *subreq);
  42 static void wb_gettoken_gotgroups(struct tevent_req *subreq);
  43 static void wb_gettoken_gotlocalgroups(struct tevent_req *subreq);
  44 static void wb_gettoken_gotbuiltins(struct tevent_req *subreq);
  45
  46 struct tevent_req *wb_gettoken_send(TALLOC_CTX *mem_ctx,
  47                                     struct tevent_context *ev,
  48                                     const struct dom_sid *sid,
  49                                     bool expand_local_aliases)
  50 {
  51         struct tevent_req *req, *subreq;
  52         struct wb_gettoken_state *state;
  53         struct dom_sid_buf buf;
  54
  55         req = tevent_req_create(mem_ctx, &state, struct wb_gettoken_state);
  56         if (req == NULL) {
  57                 return NULL;
  58         }
  59         sid_copy(&state->usersid, sid);
  60         state->ev = ev;
  61         state->expand_local_aliases = expand_local_aliases;
  62
  63         D_INFO("WB command gettoken start.\n"
  64                "Query user SID %s (expand local aliases is %d).\n",
  65                dom_sid_str_buf(sid, &buf),
  66                expand_local_aliases);
  67         subreq = wb_queryuser_send(state, ev, &state->usersid);
  68         if (tevent_req_nomem(subreq, req)) {
  69                 return tevent_req_post(req, ev);
  70         }
  71         tevent_req_set_callback(subreq, wb_gettoken_gotuser, req);
  72         return req;
  73 }
  74
  75 static void wb_gettoken_gotuser(struct tevent_req *subreq)
  76 {
  77         struct tevent_req *req = tevent_req_callback_data(
  78                 subreq, struct tevent_req);
  79         struct wb_gettoken_state *state = tevent_req_data(
  80                 req, struct wb_gettoken_state);
  81         struct wbint_userinfo *info;
  82         NTSTATUS status;
  83         struct dom_sid_buf buf0, buf1;
  84
  85         status = wb_queryuser_recv(subreq, state, &info);
  86         TALLOC_FREE(subreq);
  87         if (tevent_req_nterror(req, status)) {
  88                 return;
  89         }
  90
  91         state->sids = talloc_array(state, struct dom_sid, 2);
  92         if (tevent_req_nomem(state->sids, req)) {
  93                 return;
  94         }
  95         state->num_sids = 2;
  96
  97         D_DEBUG("Got user SID %s and group SID %s\n",
  98                   dom_sid_str_buf(&info->user_sid, &buf0),
  99                   dom_sid_str_buf(&info->group_sid, &buf1));
 100         sid_copy(&state->sids[0], &info->user_sid);
 101         sid_copy(&state->sids[1], &info->group_sid);
 102
 103         D_DEBUG("Looking up user groups for the user SID.\n");
 104         subreq = wb_lookupusergroups_send(state, state->ev, &info->user_sid);
 105         if (tevent_req_nomem(subreq, req)) {
 106                 return;
 107         }
 108         tevent_req_set_callback(subreq, wb_gettoken_gotgroups, req);
 109 }
 110
 111 static void wb_gettoken_gotgroups(struct tevent_req *subreq)
 112 {
 113         struct tevent_req *req = tevent_req_callback_data(
 114                 subreq, struct tevent_req);
 115         struct wb_gettoken_state *state = tevent_req_data(
 116                 req, struct wb_gettoken_state);
 117         uint32_t i, num_groups;
 118         struct dom_sid *groups;
 119         struct winbindd_domain *domain;
 120         NTSTATUS status;
 121         struct dom_sid_buf buf;
 122
 123         status = wb_lookupusergroups_recv(subreq, state, &num_groups, &groups);
 124         TALLOC_FREE(subreq);
 125         if (!NT_STATUS_IS_OK(status)) {
 126                 tevent_req_done(req);
 127                 return;
 128         }
 129
 130         D_DEBUG("Received %"PRIu32" group(s).\n", num_groups);
 131         for (i = 0; i < num_groups; i++) {
 132                 D_DEBUG("Adding SID %s.\n", dom_sid_str_buf(&groups[i], &buf));
 133                 status = add_sid_to_array_unique(
 134                         state, &groups[i], &state->sids, &state->num_sids);
 135
 136                 if (tevent_req_nterror(req, status)) {
 137                         return;
 138                 }
 139         }
 140
 141         if (!state->expand_local_aliases) {
 142                 D_DEBUG("Done. Not asked to expand local aliases.\n");
 143                 tevent_req_done(req);
 144                 return;
 145         }
 146
 147         /*
 148          * Expand our domain's aliases
 149          */
 150         domain = find_domain_from_sid_noinit(get_global_sam_sid());
 151         if (domain == NULL) {
 152                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 153                 return;
 154         }
 155
 156         D_DEBUG("Expand domain's aliases for %"PRIu32" SID(s).\n",
 157                 state->num_sids);
 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_gotlocalgroups, req);
 164 }
 165
 166 static void wb_gettoken_gotlocalgroups(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         struct winbindd_domain *domain;
 175         NTSTATUS status;
 176
 177         status = wb_lookupuseraliases_recv(subreq, state, &num_rids, &rids);
 178         TALLOC_FREE(subreq);
 179         if (tevent_req_nterror(req, status)) {
 180                 return;
 181         }
 182
 183         D_DEBUG("Got %"PRIu32" RID(s).\n", num_rids);
 184         status = wb_add_rids_to_sids(state, &state->num_sids, &state->sids,
 185                                      get_global_sam_sid(), num_rids, rids);
 186         if (tevent_req_nterror(req, status)) {
 187                 return;
 188         }
 189         TALLOC_FREE(rids);
 190
 191         /*
 192          * Now expand the builtin groups
 193          */
 194
 195         D_DEBUG("Expand the builtin groups for %"PRIu32" SID(s).\n",
 196                 state->num_sids);
 197         domain = find_domain_from_sid(&global_sid_Builtin);
 198         if (domain == NULL) {
 199                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 200                 return;
 201         }
 202
 203         subreq = wb_lookupuseraliases_send(state, state->ev, domain,
 204                                            state->num_sids, state->sids);
 205         if (tevent_req_nomem(subreq, req)) {
 206                 return;
 207         }
 208         tevent_req_set_callback(subreq, wb_gettoken_gotbuiltins, req);
 209 }
 210
 211 static void wb_gettoken_gotbuiltins(struct tevent_req *subreq)
 212 {
 213         struct tevent_req *req = tevent_req_callback_data(
 214                 subreq, struct tevent_req);
 215         struct wb_gettoken_state *state = tevent_req_data(
 216                 req, struct wb_gettoken_state);
 217         uint32_t num_rids;
 218         uint32_t *rids;
 219         NTSTATUS status;
 220
 221         status = wb_lookupuseraliases_recv(subreq, state, &num_rids, &rids);
 222         TALLOC_FREE(subreq);
 223         if (tevent_req_nterror(req, status)) {
 224                 return;
 225         }
 226         D_DEBUG("Got %"PRIu32" RID(s).\n", num_rids);
 227         status = wb_add_rids_to_sids(state, &state->num_sids, &state->sids,
 228                                      &global_sid_Builtin, num_rids, rids);
 229         if (tevent_req_nterror(req, status)) {
 230                 return;
 231         }
 232         tevent_req_done(req);
 233 }
 234
 235 NTSTATUS wb_gettoken_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 236                           uint32_t *num_sids, struct dom_sid **sids)
 237 {
 238         struct wb_gettoken_state *state = tevent_req_data(
 239                 req, struct wb_gettoken_state);
 240         NTSTATUS status;
 241         uint32_t i;
 242
 243         if (tevent_req_is_nterror(req, &status)) {
 244                 return status;
 245         }
 246         *num_sids = state->num_sids;
 247         D_INFO("WB command gettoken end.\nReceived %"PRIu32" SID(s).\n",
 248                state->num_sids);
 249
 250         if (CHECK_DEBUGLVL(DBGLVL_INFO)) {
 251                 for (i = 0; i < state->num_sids; i++) {
 252                         struct dom_sid_buf sidbuf;
 253                         D_INFO("%"PRIu32": %s\n",
 254                                i,
 255                                dom_sid_str_buf(&state->sids[i],
 256                                &sidbuf));
 257                 }
 258         }
 259
 260         *sids = talloc_move(mem_ctx, &state->sids);
 261         return NT_STATUS_OK;
 262 }
 263
 264 static NTSTATUS wb_add_rids_to_sids(TALLOC_CTX *mem_ctx,
 265                                     uint32_t *pnum_sids,
 266                                     struct dom_sid **psids,
 267                                     const struct dom_sid *domain_sid,
 268                                     uint32_t num_rids, uint32_t *rids)
 269 {
 270         uint32_t i;
 271
 272         D_DEBUG("%"PRIu32" SID(s) will be uniquely added to the SID array.\n"
 273                 "Before the addition the array has %"PRIu32" SID(s).\n",
 274                 num_rids, *pnum_sids);
 275
 276         for (i = 0; i < num_rids; i++) {
 277                 NTSTATUS status;
 278                 struct dom_sid sid;
 279
 280                 sid_compose(&sid, domain_sid, rids[i]);
 281                 status = add_sid_to_array_unique(
 282                         mem_ctx, &sid, psids, pnum_sids);
 283                 if (!NT_STATUS_IS_OK(status)) {
 284                         return status;
 285                 }
 286         }
 287         D_DEBUG("After the addition the array has %"PRIu32" SID(s).\n",
 288                 *pnum_sids);
 289         return NT_STATUS_OK;
 290 }