source3/utils/netlookup.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Name lookup.
   5
   6    Copyright (C) Jeremy Allison 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "utils/net.h"
  24 #include "rpc_client/cli_pipe.h"
  25 #include "../librpc/gen_ndr/ndr_lsa.h"
  26 #include "rpc_client/cli_lsarpc.h"
  27 #include "libsmb/libsmb.h"
  28
  29 /********************************************************
  30  Connection cachine struct. Goes away when ctx destroyed.
  31 ********************************************************/
  32
  33 struct con_struct {
  34         bool failed_connect;
  35         NTSTATUS err;
  36         struct cli_state *cli;
  37         struct rpc_pipe_client *lsapipe;
  38         struct policy_handle pol;
  39 };
  40
  41 static struct con_struct *cs;
  42
  43 /********************************************************
  44  Close connection on context destruction.
  45 ********************************************************/
  46
  47 static int cs_destructor(struct con_struct *p)
  48 {
  49         if (cs->cli) {
  50                 cli_shutdown(cs->cli);
  51         }
  52         cs = NULL;
  53         return 0;
  54 }
  55
  56 /********************************************************
  57  Create the connection to localhost.
  58 ********************************************************/
  59
  60 static struct con_struct *create_cs(struct net_context *c,
  61                                     TALLOC_CTX *ctx, NTSTATUS *perr)
  62 {
  63         NTSTATUS nt_status;
  64         struct sockaddr_storage loopback_ss;
  65         struct cli_credentials *anon_creds = NULL;
  66
  67         *perr = NT_STATUS_OK;
  68
  69         if (!interpret_string_addr(&loopback_ss, "127.0.0.1", AI_NUMERICHOST)) {
  70                 *perr = NT_STATUS_INVALID_PARAMETER;
  71                 return NULL;
  72         }
  73
  74         if (cs) {
  75                 if (cs->failed_connect) {
  76                         *perr = cs->err;
  77                         return NULL;
  78                 }
  79                 return cs;
  80         }
  81
  82         cs = talloc(ctx, struct con_struct);
  83         if (!cs) {
  84                 *perr = NT_STATUS_NO_MEMORY;
  85                 return NULL;
  86         }
  87
  88         anon_creds = cli_credentials_init_anon(cs);
  89         if (anon_creds == NULL) {
  90                 TALLOC_FREE(cs);
  91                 *perr = NT_STATUS_NO_MEMORY;
  92                 return NULL;
  93         }
  94
  95         ZERO_STRUCTP(cs);
  96         talloc_set_destructor(cs, cs_destructor);
  97
  98         nt_status = cli_full_connection_creds(&cs->cli, lp_netbios_name(), lp_netbios_name(),
  99                                         &loopback_ss, 0,
 100                                         "IPC$", "IPC",
 101                                         anon_creds,
 102                                         CLI_FULL_CONNECTION_IPC);
 103
 104         if (!NT_STATUS_IS_OK(nt_status)) {
 105                 DEBUG(2,("create_cs: Connect failed. Error was %s\n", nt_errstr(nt_status)));
 106                 cs->failed_connect = true;
 107                 cs->err = nt_status;
 108                 *perr = nt_status;
 109                 return NULL;
 110         }
 111
 112         nt_status = cli_rpc_pipe_open_noauth(cs->cli,
 113                                         &ndr_table_lsarpc,
 114                                         &cs->lsapipe);
 115
 116         if (!NT_STATUS_IS_OK(nt_status)) {
 117                 DEBUG(2,("create_cs: open LSA pipe failed. Error was %s\n", nt_errstr(nt_status)));
 118                 cs->failed_connect = true;
 119                 cs->err = nt_status;
 120                 *perr = nt_status;
 121                 return NULL;
 122         }
 123
 124         nt_status = rpccli_lsa_open_policy(cs->lsapipe, ctx, true,
 125                                 SEC_FLAG_MAXIMUM_ALLOWED,
 126                                 &cs->pol);
 127
 128         if (!NT_STATUS_IS_OK(nt_status)) {
 129                 DEBUG(2,("create_cs: rpccli_lsa_open_policy failed. Error was %s\n", nt_errstr(nt_status)));
 130                 cs->failed_connect = true;
 131                 cs->err = nt_status;
 132                 *perr = nt_status;
 133                 return NULL;
 134         }
 135
 136         return cs;
 137 }
 138
 139 /********************************************************
 140  Do a lookup_sids call to localhost.
 141  Check if the local machine is authoritative for this sid. We can't
 142  check if this is our SID as that's stored in the root-read-only
 143  secrets.tdb.
 144  The local smbd will also ask winbindd for us, so we don't have to.
 145 ********************************************************/
 146
 147 NTSTATUS net_lookup_name_from_sid(struct net_context *c,
 148                                 TALLOC_CTX *ctx,
 149                                 struct dom_sid *psid,
 150                                 const char **ppdomain,
 151                                 const char **ppname)
 152 {
 153         NTSTATUS nt_status;
 154         struct con_struct *csp = NULL;
 155         char **domains;
 156         char **names;
 157         enum lsa_SidType *types;
 158
 159         *ppdomain = NULL;
 160         *ppname = NULL;
 161
 162         csp = create_cs(c, ctx, &nt_status);
 163         if (csp == NULL) {
 164                 return nt_status;
 165         }
 166
 167         nt_status = rpccli_lsa_lookup_sids(csp->lsapipe, ctx,
 168                                                 &csp->pol,
 169                                                 1, psid,
 170                                                 &domains,
 171                                                 &names,
 172                                                 &types);
 173
 174         if (!NT_STATUS_IS_OK(nt_status)) {
 175                 return nt_status;
 176         }
 177
 178         *ppdomain = domains[0];
 179         *ppname = names[0];
 180         /* Don't care about type here. */
 181
 182         /* Converted OK */
 183         return NT_STATUS_OK;
 184 }
 185
 186 /********************************************************
 187  Do a lookup_names call to localhost.
 188 ********************************************************/
 189
 190 NTSTATUS net_lookup_sid_from_name(struct net_context *c, TALLOC_CTX *ctx,
 191                                   const char *full_name, struct dom_sid *pret_sid)
 192 {
 193         NTSTATUS nt_status;
 194         struct con_struct *csp = NULL;
 195         struct dom_sid *sids = NULL;
 196         enum lsa_SidType *types = NULL;
 197
 198         csp = create_cs(c, ctx, &nt_status);
 199         if (csp == NULL) {
 200                 return nt_status;
 201         }
 202
 203         nt_status = rpccli_lsa_lookup_names(csp->lsapipe, ctx,
 204                                                 &csp->pol,
 205                                                 1,
 206                                                 &full_name,
 207                                                 NULL, 1,
 208                                                 &sids, &types);
 209
 210         if (!NT_STATUS_IS_OK(nt_status)) {
 211                 return nt_status;
 212         }
 213
 214         *pret_sid = sids[0];
 215
 216         /* Converted OK */
 217         return NT_STATUS_OK;
 218 }