source/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 2 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, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24 #include "utils/net.h"
  25
  26 /********************************************************
  27  Connection cachine struct. Goes away when ctx destroyed.
  28 ********************************************************/
  29
  30 struct con_struct {
  31         BOOL failed_connect;
  32         NTSTATUS err;
  33         struct cli_state *cli;
  34         struct rpc_pipe_client *lsapipe;
  35         POLICY_HND pol;
  36 };
  37
  38 static struct con_struct *cs;
  39
  40 /********************************************************
  41  Close connection on context destruction.
  42 ********************************************************/
  43
  44 static int cs_destructor(void *p)
  45 {
  46         if (cs->cli) {
  47                 cli_shutdown(cs->cli);
  48         }
  49         cs = NULL;
  50         return 0;
  51 }
  52
  53 /********************************************************
  54  Create the connection to localhost.
  55 ********************************************************/
  56
  57 static struct con_struct *create_cs(TALLOC_CTX *ctx, NTSTATUS *perr)
  58 {
  59         NTSTATUS nt_status;
  60         struct in_addr loopback_ip = *interpret_addr2("127.0.0.1");
  61
  62         *perr = NT_STATUS_OK;
  63
  64         if (cs) {
  65                 if (cs->failed_connect) {
  66                         *perr = cs->err;
  67                         return NULL;
  68                 }
  69                 return cs;
  70         }
  71
  72         cs = TALLOC_P(ctx, struct con_struct);
  73         if (!cs) {
  74                 *perr = NT_STATUS_NO_MEMORY;
  75                 return NULL;
  76         }
  77
  78         ZERO_STRUCTP(cs);
  79         talloc_set_destructor(cs, cs_destructor);
  80
  81         /* Connect to localhost with given username/password. */
  82         /* JRA. Pretty sure we can just do this anonymously.... */
  83 #if 0
  84         if (!opt_password && !opt_machine_pass) {
  85                 char *pass = getpass("Password:");
  86                 if (pass) {
  87                         opt_password = SMB_STRDUP(pass);
  88                 }
  89         }
  90 #endif
  91
  92         nt_status = cli_full_connection(&cs->cli, global_myname(), global_myname(),
  93                                         &loopback_ip, 0,
  94                                         "IPC$", "IPC",
  95 #if 0
  96                                         opt_user_name,
  97                                         opt_workgroup,
  98                                         opt_password,
  99 #else
 100                                         "",
 101                                         opt_workgroup,
 102                                         "",
 103 #endif
 104                                         0,
 105                                         Undefined,
 106                                         NULL);
 107
 108         if (!NT_STATUS_IS_OK(nt_status)) {
 109                 DEBUG(2,("create_cs: Connect failed. Error was %s\n", nt_errstr(nt_status)));
 110                 cs->failed_connect = True;
 111                 cs->err = nt_status;
 112                 *perr = nt_status;
 113                 return NULL;
 114         }
 115
 116         cs->lsapipe = cli_rpc_pipe_open_noauth(cs->cli,
 117                                         PI_LSARPC,
 118                                         &nt_status);
 119
 120         if (cs->lsapipe == NULL) {
 121                 DEBUG(2,("create_cs: open LSA pipe failed. Error was %s\n", nt_errstr(nt_status)));
 122                 cs->failed_connect = True;
 123                 cs->err = nt_status;
 124                 *perr = nt_status;
 125                 return NULL;
 126         }
 127
 128         nt_status = rpccli_lsa_open_policy(cs->lsapipe, ctx, True,
 129                                 SEC_RIGHTS_MAXIMUM_ALLOWED,
 130                                 &cs->pol);
 131
 132         if (!NT_STATUS_IS_OK(nt_status)) {
 133                 DEBUG(2,("create_cs: rpccli_lsa_open_policy failed. Error was %s\n", nt_errstr(nt_status)));
 134                 cs->failed_connect = True;
 135                 cs->err = nt_status;
 136                 *perr = nt_status;
 137                 return NULL;
 138         }
 139
 140         return cs;
 141 }
 142
 143 /********************************************************
 144  Do a lookup_sids call to localhost.
 145  Check if the local machine is authoritative for this sid. We can't
 146  check if this is our SID as that's stored in the root-read-only
 147  secrets.tdb.
 148  The local smbd will also ask winbindd for us, so we don't have to.
 149 ********************************************************/
 150
 151 NTSTATUS net_lookup_name_from_sid(TALLOC_CTX *ctx,
 152                                 DOM_SID *psid,
 153                                 const char **ppdomain,
 154                                 const char **ppname)
 155 {
 156         NTSTATUS nt_status;
 157         struct con_struct *csp = NULL;
 158         char **domains;
 159         char **names;
 160         uint32 *types;
 161
 162         *ppdomain = NULL;
 163         *ppname = NULL;
 164
 165         csp = create_cs(ctx, &nt_status);
 166         if (csp == NULL) {
 167                 return nt_status;
 168         }
 169
 170         nt_status = rpccli_lsa_lookup_sids(csp->lsapipe, ctx,
 171                                                 &csp->pol,
 172                                                 1, psid,
 173                                                 &domains,
 174                                                 &names,
 175                                                 &types);
 176
 177         if (!NT_STATUS_IS_OK(nt_status)) {
 178                 return nt_status;
 179         }
 180
 181         *ppdomain = domains[0];
 182         *ppname = names[0];
 183         /* Don't care about type here. */
 184
 185         /* Converted OK */
 186         return NT_STATUS_OK;
 187 }
 188
 189 /********************************************************
 190  Do a lookup_names call to localhost.
 191 ********************************************************/
 192
 193 NTSTATUS net_lookup_sid_from_name(TALLOC_CTX *ctx, const char *full_name, DOM_SID *pret_sid)
 194 {
 195         NTSTATUS nt_status;
 196         struct con_struct *csp = NULL;
 197         DOM_SID *sids = NULL;
 198         uint32 *types = NULL;
 199
 200         csp = create_cs(ctx, &nt_status);
 201         if (csp == NULL) {
 202                 return nt_status;
 203         }
 204
 205         nt_status = rpccli_lsa_lookup_names(csp->lsapipe, ctx,
 206                                                 &csp->pol,
 207                                                 1,
 208                                                 &full_name,
 209                                                 NULL, &sids,
 210                                                 &types);
 211
 212         if (!NT_STATUS_IS_OK(nt_status)) {
 213                 return nt_status;
 214         }
 215
 216         *pret_sid = sids[0];
 217
 218         /* Converted OK */
 219         return NT_STATUS_OK;
 220 }