source3/winbindd/winbindd_getsidaliases.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async implementation of WINBINDD_GETSIDALIASES
   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 "../libcli/security/security.h"
  23
  24 struct winbindd_getsidaliases_state {
  25         struct dom_sid sid;
  26         uint32_t num_aliases;
  27         uint32_t *aliases;
  28 };
  29
  30 static bool parse_sidlist(TALLOC_CTX *mem_ctx, const char *sidstr,
  31                           struct dom_sid **sids, uint32_t *num_sids);
  32
  33 static void winbindd_getsidaliases_done(struct tevent_req *subreq);
  34
  35 struct tevent_req *winbindd_getsidaliases_send(TALLOC_CTX *mem_ctx,
  36                                                struct tevent_context *ev,
  37                                                struct winbindd_cli_state *cli,
  38                                                struct winbindd_request *request)
  39 {
  40         struct tevent_req *req, *subreq;
  41         struct winbindd_getsidaliases_state *state;
  42         struct winbindd_domain *domain;
  43         uint32_t num_sids;
  44         struct dom_sid *sids;
  45
  46         req = tevent_req_create(mem_ctx, &state,
  47                                 struct winbindd_getsidaliases_state);
  48         if (req == NULL) {
  49                 return NULL;
  50         }
  51
  52         /* Ensure null termination */
  53         request->data.sid[sizeof(request->data.sid)-1]='\0';
  54
  55         DEBUG(3, ("getsidaliases %s\n", request->data.sid));
  56
  57         if (!string_to_sid(&state->sid, request->data.sid)) {
  58                 DEBUG(1, ("Could not get convert sid %s from string\n",
  59                           request->data.sid));
  60                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
  61                 return tevent_req_post(req, ev);
  62         }
  63
  64         domain = find_domain_from_sid_noinit(&state->sid);
  65         if (domain == NULL) {
  66                 DEBUG(1,("could not find domain entry for sid %s\n",
  67                          request->data.sid));
  68                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_DOMAIN);
  69                 return tevent_req_post(req, ev);
  70         }
  71
  72         num_sids = 0;
  73         sids = NULL;
  74
  75         if (request->extra_data.data != NULL) {
  76                 if (request->extra_data.data[request->extra_len-1] != '\0') {
  77                         DEBUG(1, ("Got non-NULL terminated sidlist\n"));
  78                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
  79                         return tevent_req_post(req, ev);
  80                 }
  81                 if (!parse_sidlist(state, request->extra_data.data,
  82                                    &sids, &num_sids)) {
  83                         DEBUG(1, ("Could not parse SID list: %s\n",
  84                                   request->extra_data.data));
  85                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
  86                         return tevent_req_post(req, ev);
  87                 }
  88         }
  89
  90         if (DEBUGLEVEL >= 10) {
  91                 size_t i;
  92                 for (i=0; i<num_sids; i++) {
  93                         fstring sidstr;
  94                         sid_to_fstring(sidstr, &sids[i]);
  95                         DEBUGADD(10, ("%s\n", sidstr));
  96                 }
  97         }
  98
  99         subreq = wb_lookupuseraliases_send(state, ev, domain, num_sids, sids);
 100         if (tevent_req_nomem(subreq, req)) {
 101                 return tevent_req_post(req, ev);
 102         }
 103         tevent_req_set_callback(subreq, winbindd_getsidaliases_done, req);
 104         return req;
 105 }
 106
 107 static void winbindd_getsidaliases_done(struct tevent_req *subreq)
 108 {
 109         struct tevent_req *req = tevent_req_callback_data(
 110                 subreq, struct tevent_req);
 111         struct winbindd_getsidaliases_state *state = tevent_req_data(
 112                 req, struct winbindd_getsidaliases_state);
 113         NTSTATUS status;
 114
 115         status = wb_lookupuseraliases_recv(subreq, state, &state->num_aliases,
 116                                            &state->aliases);
 117         TALLOC_FREE(subreq);
 118         if (!NT_STATUS_IS_OK(status)) {
 119                 tevent_req_nterror(req, status);
 120                 return;
 121         }
 122         tevent_req_done(req);
 123 }
 124
 125 NTSTATUS winbindd_getsidaliases_recv(struct tevent_req *req,
 126                                      struct winbindd_response *response)
 127 {
 128         struct winbindd_getsidaliases_state *state = tevent_req_data(
 129                 req, struct winbindd_getsidaliases_state);
 130         NTSTATUS status;
 131         int i;
 132         char *sidlist;
 133
 134         if (tevent_req_is_nterror(req, &status)) {
 135                 return status;
 136         }
 137
 138         sidlist = talloc_strdup(response, "");
 139         if (sidlist == NULL) {
 140                 return NT_STATUS_NO_MEMORY;
 141         }
 142         for (i=0; i<state->num_aliases; i++) {
 143                 struct dom_sid sid;
 144                 fstring tmp;
 145                 sid_compose(&sid, &state->sid, state->aliases[i]);
 146
 147                 sidlist = talloc_asprintf_append_buffer(
 148                         sidlist, "%s\n", sid_to_fstring(tmp, &sid));
 149                 if (sidlist == NULL) {
 150                         return NT_STATUS_NO_MEMORY;
 151                 }
 152         }
 153         response->extra_data.data = sidlist;
 154         response->length += talloc_get_size(sidlist);
 155         response->data.num_entries = state->num_aliases;
 156         return NT_STATUS_OK;
 157 }
 158
 159 static bool parse_sidlist(TALLOC_CTX *mem_ctx, const char *sidstr,
 160                           struct dom_sid **sids, uint32_t *num_sids)
 161 {
 162         const char *p, *q;
 163
 164         p = sidstr;
 165         if (p == NULL)
 166                 return False;
 167
 168         while (p[0] != '\0') {
 169                 fstring tmp;
 170                 size_t sidlen;
 171                 struct dom_sid sid;
 172                 q = strchr(p, '\n');
 173                 if (q == NULL) {
 174                         DEBUG(0, ("Got invalid sidstr: %s\n", p));
 175                         return False;
 176                 }
 177                 sidlen = PTR_DIFF(q, p);
 178                 if (sidlen >= sizeof(tmp)-1) {
 179                         return false;
 180                 }
 181                 memcpy(tmp, p, sidlen);
 182                 tmp[sidlen] = '\0';
 183                 q += 1;
 184                 if (!string_to_sid(&sid, tmp)) {
 185                         DEBUG(0, ("Could not parse sid %s\n", p));
 186                         return False;
 187                 }
 188                 if (!NT_STATUS_IS_OK(add_sid_to_array(mem_ctx, &sid, sids,
 189                                                       num_sids)))
 190                 {
 191                         return False;
 192                 }
 193                 p = q;
 194         }
 195         return True;
 196 }