source3/rpc_client/cli_pipe_schannel.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  RPC Pipe client / server routines
   4  *  Largely rewritten by Jeremy Allison             2005.
   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 "../librpc/gen_ndr/ndr_schannel.h"
  22 #include "../librpc/gen_ndr/ndr_netlogon.h"
  23 #include "../libcli/auth/schannel.h"
  24 #include "rpc_client/cli_netlogon.h"
  25 #include "rpc_client/cli_pipe.h"
  26 #include "librpc/rpc/dcerpc.h"
  27 #include "passdb.h"
  28 #include "libsmb/libsmb.h"
  29 #include "../libcli/smb/smbXcli_base.h"
  30 #include "libcli/auth/netlogon_creds_cli.h"
  31
  32 #undef DBGC_CLASS
  33 #define DBGC_CLASS DBGC_RPC_CLI
  34
  35 /****************************************************************************
  36  Open a named pipe to an SMB server and bind using schannel (bind type 68).
  37  Fetch the session key ourselves using a temporary netlogon pipe.
  38  ****************************************************************************/
  39
  40 NTSTATUS cli_rpc_pipe_open_schannel(struct cli_state *cli,
  41                                     struct messaging_context *msg_ctx,
  42                                     const struct ndr_interface_table *table,
  43                                     enum dcerpc_transport_t transport,
  44                                     enum dcerpc_AuthLevel auth_level,
  45                                     const char *domain,
  46                                     struct rpc_pipe_client **presult,
  47                                     TALLOC_CTX *mem_ctx,
  48                                     struct netlogon_creds_cli_context **pcreds)
  49 {
  50         TALLOC_CTX *frame = talloc_stackframe();
  51         const char *dc_name = smbXcli_conn_remote_name(cli->conn);
  52         struct rpc_pipe_client *result = NULL;
  53         NTSTATUS status;
  54         struct netlogon_creds_cli_context *netlogon_creds = NULL;
  55         struct netlogon_creds_CredentialState *creds = NULL;
  56         uint32_t netlogon_flags = 0;
  57         enum netr_SchannelType sec_chan_type = 0;
  58         const char *_account_name = NULL;
  59         const char *account_name = NULL;
  60         struct samr_Password current_nt_hash;
  61         struct samr_Password *previous_nt_hash = NULL;
  62         bool ok;
  63
  64         ok = get_trust_pw_hash(domain,
  65                                current_nt_hash.hash,
  66                                &_account_name,
  67                                &sec_chan_type);
  68         if (!ok) {
  69                 TALLOC_FREE(frame);
  70                 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
  71         }
  72
  73         account_name = talloc_asprintf(frame, "%s$", _account_name);
  74         if (account_name == NULL) {
  75                 SAFE_FREE(previous_nt_hash);
  76                 TALLOC_FREE(frame);
  77                 return NT_STATUS_NO_MEMORY;
  78         }
  79
  80         status = rpccli_create_netlogon_creds(dc_name,
  81                                               domain,
  82                                               account_name,
  83                                               sec_chan_type,
  84                                               msg_ctx,
  85                                               frame,
  86                                               &netlogon_creds);
  87         if (!NT_STATUS_IS_OK(status)) {
  88                 SAFE_FREE(previous_nt_hash);
  89                 TALLOC_FREE(frame);
  90                 return status;
  91         }
  92
  93         status = rpccli_setup_netlogon_creds(cli,
  94                                              netlogon_creds,
  95                                              false, /* force_reauth */
  96                                              current_nt_hash,
  97                                              previous_nt_hash);
  98         SAFE_FREE(previous_nt_hash);
  99         if (!NT_STATUS_IS_OK(status)) {
 100                 TALLOC_FREE(frame);
 101                 return status;
 102         }
 103
 104         status = netlogon_creds_cli_get(netlogon_creds,
 105                                         frame,
 106                                         &creds);
 107         if (!NT_STATUS_IS_OK(status)) {
 108                 TALLOC_FREE(frame);
 109                 return status;
 110         }
 111         netlogon_flags = creds->negotiate_flags;
 112         TALLOC_FREE(creds);
 113
 114         if (!(netlogon_flags & NETLOGON_NEG_AUTHENTICATED_RPC)) {
 115                 TALLOC_FREE(frame);
 116                 return NT_STATUS_DOWNGRADE_DETECTED;
 117         }
 118
 119         status = cli_rpc_pipe_open_schannel_with_key(
 120                 cli, table, transport, domain,
 121                 netlogon_creds,
 122                 &result);
 123
 124         if (NT_STATUS_IS_OK(status)) {
 125                 *presult = result;
 126                 if (pcreds != NULL) {
 127                         *pcreds = talloc_move(mem_ctx, &netlogon_creds);
 128                 }
 129         }
 130
 131         TALLOC_FREE(frame);
 132         return status;
 133 }