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/gen_ndr/ndr_dcerpc.h"
  27 #include "librpc/rpc/dcerpc.h"
  28 #include "passdb.h"
  29 #include "libsmb/libsmb.h"
  30
  31 #undef DBGC_CLASS
  32 #define DBGC_CLASS DBGC_RPC_CLI
  33
  34
  35 /****************************************************************************
  36   Get a the schannel session key out of an already opened netlogon pipe.
  37  ****************************************************************************/
  38 static NTSTATUS get_schannel_session_key_common(struct rpc_pipe_client *netlogon_pipe,
  39                                                 struct cli_state *cli,
  40                                                 const char *domain,
  41                                                 uint32 *pneg_flags)
  42 {
  43         enum netr_SchannelType sec_chan_type = 0;
  44         unsigned char machine_pwd[16];
  45         const char *machine_account;
  46         NTSTATUS status;
  47
  48         /* Get the machine account credentials from secrets.tdb. */
  49         if (!get_trust_pw_hash(domain, machine_pwd, &machine_account,
  50                                &sec_chan_type))
  51         {
  52                 DEBUG(0, ("get_schannel_session_key: could not fetch "
  53                         "trust account password for domain '%s'\n",
  54                         domain));
  55                 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
  56         }
  57
  58         status = rpccli_netlogon_setup_creds(netlogon_pipe,
  59                                         cli_state_remote_name(cli), /* server name */
  60                                         domain,        /* domain */
  61                                         lp_netbios_name(), /* client name */
  62                                         machine_account, /* machine account name */
  63                                         machine_pwd,
  64                                         sec_chan_type,
  65                                         pneg_flags);
  66
  67         if (!NT_STATUS_IS_OK(status)) {
  68                 DEBUG(3, ("get_schannel_session_key_common: "
  69                           "rpccli_netlogon_setup_creds failed with result %s "
  70                           "to server %s, domain %s, machine account %s.\n",
  71                           nt_errstr(status), cli_state_remote_name(cli), domain,
  72                           machine_account ));
  73                 return status;
  74         }
  75
  76         if (((*pneg_flags) & NETLOGON_NEG_SCHANNEL) == 0) {
  77                 DEBUG(3, ("get_schannel_session_key: Server %s did not offer schannel\n",
  78                         cli_state_remote_name(cli)));
  79                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
  80         }
  81
  82         return NT_STATUS_OK;
  83 }
  84
  85 /****************************************************************************
  86  Open a named pipe to an SMB server and bind using schannel (bind type 68).
  87  Fetch the session key ourselves using a temporary netlogon pipe. This
  88  version uses an ntlmssp auth bound netlogon pipe to get the key.
  89  ****************************************************************************/
  90
  91 static NTSTATUS get_schannel_session_key_auth_ntlmssp(struct cli_state *cli,
  92                                                       const char *domain,
  93                                                       const char *username,
  94                                                       const char *password,
  95                                                       uint32 *pneg_flags,
  96                                                       struct rpc_pipe_client **presult)
  97 {
  98         struct rpc_pipe_client *netlogon_pipe = NULL;
  99         NTSTATUS status;
 100
 101         status = cli_rpc_pipe_open_spnego_ntlmssp(
 102                 cli, &ndr_table_netlogon.syntax_id, NCACN_NP,
 103                 DCERPC_AUTH_LEVEL_PRIVACY,
 104                 domain, username, password, &netlogon_pipe);
 105         if (!NT_STATUS_IS_OK(status)) {
 106                 return status;
 107         }
 108
 109         status = get_schannel_session_key_common(netlogon_pipe, cli, domain,
 110                                                  pneg_flags);
 111         if (!NT_STATUS_IS_OK(status)) {
 112                 TALLOC_FREE(netlogon_pipe);
 113                 return status;
 114         }
 115
 116         *presult = netlogon_pipe;
 117         return NT_STATUS_OK;
 118 }
 119
 120 /****************************************************************************
 121  Open a named pipe to an SMB server and bind using schannel (bind type 68).
 122  Fetch the session key ourselves using a temporary netlogon pipe. This version
 123  uses an ntlmssp bind to get the session key.
 124  ****************************************************************************/
 125
 126 NTSTATUS cli_rpc_pipe_open_ntlmssp_auth_schannel(struct cli_state *cli,
 127                                                  const struct ndr_syntax_id *interface,
 128                                                  enum dcerpc_transport_t transport,
 129                                                  enum dcerpc_AuthLevel auth_level,
 130                                                  const char *domain,
 131                                                  const char *username,
 132                                                  const char *password,
 133                                                  struct rpc_pipe_client **presult)
 134 {
 135         uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
 136         struct rpc_pipe_client *netlogon_pipe = NULL;
 137         struct rpc_pipe_client *result = NULL;
 138         NTSTATUS status;
 139
 140         status = get_schannel_session_key_auth_ntlmssp(
 141                 cli, domain, username, password, &neg_flags, &netlogon_pipe);
 142         if (!NT_STATUS_IS_OK(status)) {
 143                 DEBUG(0,("cli_rpc_pipe_open_ntlmssp_auth_schannel: failed to get schannel session "
 144                         "key from server %s for domain %s.\n",
 145                         cli_state_remote_name(cli), domain ));
 146                 return status;
 147         }
 148
 149         status = cli_rpc_pipe_open_schannel_with_key(
 150                 cli, interface, transport, auth_level, domain, &netlogon_pipe->dc,
 151                 &result);
 152
 153         /* Now we've bound using the session key we can close the netlog pipe. */
 154         TALLOC_FREE(netlogon_pipe);
 155
 156         if (NT_STATUS_IS_OK(status)) {
 157                 *presult = result;
 158         }
 159         return status;
 160 }
 161
 162 /****************************************************************************
 163  Open a named pipe to an SMB server and bind using schannel (bind type 68).
 164  Fetch the session key ourselves using a temporary netlogon pipe.
 165  ****************************************************************************/
 166
 167 NTSTATUS cli_rpc_pipe_open_schannel(struct cli_state *cli,
 168                                     const struct ndr_syntax_id *interface,
 169                                     enum dcerpc_transport_t transport,
 170                                     enum dcerpc_AuthLevel auth_level,
 171                                     const char *domain,
 172                                     struct rpc_pipe_client **presult)
 173 {
 174         uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
 175         struct rpc_pipe_client *netlogon_pipe = NULL;
 176         struct rpc_pipe_client *result = NULL;
 177         NTSTATUS status;
 178
 179         status = get_schannel_session_key(cli, domain, &neg_flags,
 180                                           &netlogon_pipe);
 181         if (!NT_STATUS_IS_OK(status)) {
 182                 DEBUG(0,("cli_rpc_pipe_open_schannel: failed to get schannel session "
 183                         "key from server %s for domain %s.\n",
 184                         cli_state_remote_name(cli), domain ));
 185                 return status;
 186         }
 187
 188         status = cli_rpc_pipe_open_schannel_with_key(
 189                 cli, interface, transport, auth_level, domain, &netlogon_pipe->dc,
 190                 &result);
 191
 192         /* Now we've bound using the session key we can close the netlog pipe. */
 193         TALLOC_FREE(netlogon_pipe);
 194
 195         if (NT_STATUS_IS_OK(status)) {
 196                 *presult = result;
 197         }
 198
 199         return status;
 200 }
 201
 202 /****************************************************************************
 203  Open a netlogon pipe and get the schannel session key.
 204  Now exposed to external callers.
 205  ****************************************************************************/
 206
 207
 208 NTSTATUS get_schannel_session_key(struct cli_state *cli,
 209                                   const char *domain,
 210                                   uint32 *pneg_flags,
 211                                   struct rpc_pipe_client **presult)
 212 {
 213         struct rpc_pipe_client *netlogon_pipe = NULL;
 214         NTSTATUS status;
 215
 216         status = cli_rpc_pipe_open_noauth(cli, &ndr_table_netlogon.syntax_id,
 217                                           &netlogon_pipe);
 218         if (!NT_STATUS_IS_OK(status)) {
 219                 return status;
 220         }
 221
 222         status = get_schannel_session_key_common(netlogon_pipe, cli, domain,
 223                                                  pneg_flags);
 224         if (!NT_STATUS_IS_OK(status)) {
 225                 TALLOC_FREE(netlogon_pipe);
 226                 return status;
 227         }
 228
 229         *presult = netlogon_pipe;
 230         return NT_STATUS_OK;
 231 }