source3/winbindd/wb_getpwsid.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async getpwsid
   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
  25 struct wb_getpwsid_state {
  26         struct tevent_context *ev;
  27         struct dom_sid sid;
  28         struct wbint_userinfo *userinfo;
  29         struct winbindd_pw *pw;
  30 };
  31
  32 static void wb_getpwsid_queryuser_done(struct tevent_req *subreq);
  33 static void wb_getpwsid_lookupsid_done(struct tevent_req *subreq);
  34 static void wb_getpwsid_done(struct tevent_req *subreq);
  35
  36 struct tevent_req *wb_getpwsid_send(TALLOC_CTX *mem_ctx,
  37                                     struct tevent_context *ev,
  38                                     const struct dom_sid *user_sid,
  39                                     struct winbindd_pw *pw)
  40 {
  41         struct tevent_req *req, *subreq;
  42         struct wb_getpwsid_state *state;
  43
  44         req = tevent_req_create(mem_ctx, &state, struct wb_getpwsid_state);
  45         if (req == NULL) {
  46                 return NULL;
  47         }
  48         sid_copy(&state->sid, user_sid);
  49         state->ev = ev;
  50         state->pw = pw;
  51
  52         subreq = wb_queryuser_send(state, ev, &state->sid);
  53         if (tevent_req_nomem(subreq, req)) {
  54                 return tevent_req_post(req, ev);
  55         }
  56         tevent_req_set_callback(subreq, wb_getpwsid_queryuser_done, req);
  57         return req;
  58 }
  59
  60 static void wb_getpwsid_queryuser_done(struct tevent_req *subreq)
  61 {
  62         struct tevent_req *req = tevent_req_callback_data(
  63                 subreq, struct tevent_req);
  64         struct wb_getpwsid_state *state = tevent_req_data(
  65                 req, struct wb_getpwsid_state);
  66         NTSTATUS status;
  67
  68         status = wb_queryuser_recv(subreq, state, &state->userinfo);
  69         TALLOC_FREE(subreq);
  70         if (NT_STATUS_IS_OK(status)
  71             && (state->userinfo->acct_name != NULL)
  72             && (state->userinfo->acct_name[0] != '\0'))
  73         {
  74                 /*
  75                  * QueryUser got us a name, let's go directly to the
  76                  * fill_pwent step
  77                  */
  78                 subreq = wb_fill_pwent_send(state, state->ev, state->userinfo,
  79                                             state->pw);
  80                 if (tevent_req_nomem(subreq, req)) {
  81                         return;
  82                 }
  83                 tevent_req_set_callback(subreq, wb_getpwsid_done, req);
  84                 return;
  85         }
  86
  87         /*
  88          * Either query_user did not succeed, or it
  89          * succeeded but did not return an acct_name.
  90          * (TODO: Can this happen at all???)
  91          * ==> Try lsa_lookupsids.
  92          */
  93         if (state->userinfo == NULL) {
  94                 state->userinfo = talloc_zero(state, struct wbint_userinfo);
  95                 if (tevent_req_nomem(state->userinfo, req)) {
  96                         return;
  97                 }
  98
  99                 /* a successful query_user call would have filled these */
 100                 sid_copy(&state->userinfo->user_sid, &state->sid);
 101                 state->userinfo->homedir = NULL;
 102                 state->userinfo->shell = NULL;
 103                 state->userinfo->primary_gid = (gid_t)-1;
 104         }
 105
 106         subreq = wb_lookupsid_send(state, state->ev, &state->sid);
 107         if (tevent_req_nomem(subreq, req)) {
 108                 return;
 109         }
 110         tevent_req_set_callback(subreq, wb_getpwsid_lookupsid_done, req);
 111 }
 112
 113 static void wb_getpwsid_lookupsid_done(struct tevent_req *subreq)
 114 {
 115         struct tevent_req *req = tevent_req_callback_data(
 116                 subreq, struct tevent_req);
 117         struct wb_getpwsid_state *state = tevent_req_data(
 118                 req, struct wb_getpwsid_state);
 119         NTSTATUS status;
 120         enum lsa_SidType type;
 121         const char *domain;
 122
 123         status = wb_lookupsid_recv(subreq, state->userinfo, &type, &domain,
 124                                    &state->userinfo->acct_name);
 125         TALLOC_FREE(subreq);
 126         if (tevent_req_nterror(req, status)) {
 127                 return;
 128         }
 129
 130         switch (type) {
 131         case SID_NAME_USER:
 132         case SID_NAME_COMPUTER:
 133                 /*
 134                  * user case: we only need the account name from lookup_sids
 135                  */
 136                 break;
 137         case SID_NAME_DOM_GRP:
 138         case SID_NAME_ALIAS:
 139         case SID_NAME_WKN_GRP:
 140                 /*
 141                  * also treat group-type SIDs (they might map to ID_TYPE_BOTH)
 142                  */
 143                 sid_copy(&state->userinfo->group_sid, &state->sid);
 144                 break;
 145         default:
 146                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
 147                 return;
 148         }
 149
 150         subreq = wb_fill_pwent_send(state, state->ev, state->userinfo,
 151                                     state->pw);
 152         if (tevent_req_nomem(subreq, req)) {
 153                 return;
 154         }
 155         tevent_req_set_callback(subreq, wb_getpwsid_done, req);
 156 }
 157
 158 static void wb_getpwsid_done(struct tevent_req *subreq)
 159 {
 160         struct tevent_req *req = tevent_req_callback_data(
 161                 subreq, struct tevent_req);
 162         NTSTATUS status;
 163
 164         status = wb_fill_pwent_recv(subreq);
 165         if (tevent_req_nterror(req, status)) {
 166                 return;
 167         }
 168         tevent_req_done(req);
 169 }
 170
 171 NTSTATUS wb_getpwsid_recv(struct tevent_req *req)
 172 {
 173         return tevent_req_simple_recv_ntstatus(req);
 174 }