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