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https://github.com/samba-team/samba.git
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4f6f4ea93c
Signed-off-by: Luk Claes <luk@debian.org> Signed-off-by: Stefan Metzmacher <metze@samba.org>
236 lines
7.6 KiB
C
236 lines
7.6 KiB
C
/*
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* Unix SMB/CIFS implementation.
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* RPC Pipe client / server routines
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* Largely rewritten by Jeremy Allison 2005.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "../librpc/gen_ndr/ndr_schannel.h"
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#include "../librpc/gen_ndr/ndr_netlogon.h"
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#include "../libcli/auth/schannel.h"
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#include "rpc_client/cli_netlogon.h"
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#include "rpc_client/cli_pipe.h"
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#include "librpc/gen_ndr/ndr_dcerpc.h"
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#include "librpc/rpc/dcerpc.h"
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#include "passdb.h"
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#include "libsmb/libsmb.h"
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#include "auth/gensec/gensec.h"
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#include "../libcli/smb/smbXcli_base.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_RPC_CLI
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/****************************************************************************
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Get a the schannel session key out of an already opened netlogon pipe.
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****************************************************************************/
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static NTSTATUS get_schannel_session_key_common(struct rpc_pipe_client *netlogon_pipe,
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struct cli_state *cli,
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const char *domain,
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uint32 *pneg_flags)
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{
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enum netr_SchannelType sec_chan_type = 0;
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unsigned char machine_pwd[16];
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const char *machine_account;
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NTSTATUS status;
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/* Get the machine account credentials from secrets.tdb. */
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if (!get_trust_pw_hash(domain, machine_pwd, &machine_account,
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&sec_chan_type))
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{
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DEBUG(0, ("get_schannel_session_key: could not fetch "
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"trust account password for domain '%s'\n",
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domain));
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return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
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}
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status = rpccli_netlogon_setup_creds(netlogon_pipe,
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smbXcli_conn_remote_name(cli->conn), /* server name */
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domain, /* domain */
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lp_netbios_name(), /* client name */
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machine_account, /* machine account name */
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machine_pwd,
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sec_chan_type,
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pneg_flags);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(3, ("get_schannel_session_key_common: "
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"rpccli_netlogon_setup_creds failed with result %s "
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"to server %s, domain %s, machine account %s.\n",
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nt_errstr(status), smbXcli_conn_remote_name(cli->conn), domain,
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machine_account ));
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return status;
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}
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if (((*pneg_flags) & NETLOGON_NEG_SCHANNEL) == 0) {
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DEBUG(3, ("get_schannel_session_key: Server %s did not offer schannel\n",
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smbXcli_conn_remote_name(cli->conn)));
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return NT_STATUS_INVALID_NETWORK_RESPONSE;
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}
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return NT_STATUS_OK;
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}
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/****************************************************************************
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Open a named pipe to an SMB server and bind using schannel (bind type 68).
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Fetch the session key ourselves using a temporary netlogon pipe. This
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version uses an ntlmssp auth bound netlogon pipe to get the key.
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****************************************************************************/
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static NTSTATUS get_schannel_session_key_auth_ntlmssp(struct cli_state *cli,
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const char *domain,
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const char *username,
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const char *password,
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uint32 *pneg_flags,
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struct rpc_pipe_client **presult)
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{
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struct rpc_pipe_client *netlogon_pipe = NULL;
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NTSTATUS status;
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status = cli_rpc_pipe_open_spnego(
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cli, &ndr_table_netlogon, NCACN_NP,
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GENSEC_OID_NTLMSSP,
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DCERPC_AUTH_LEVEL_PRIVACY,
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smbXcli_conn_remote_name(cli->conn),
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domain, username, password, &netlogon_pipe);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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status = get_schannel_session_key_common(netlogon_pipe, cli, domain,
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pneg_flags);
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if (!NT_STATUS_IS_OK(status)) {
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TALLOC_FREE(netlogon_pipe);
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return status;
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}
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*presult = netlogon_pipe;
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return NT_STATUS_OK;
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}
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/****************************************************************************
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Open a named pipe to an SMB server and bind using schannel (bind type 68).
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Fetch the session key ourselves using a temporary netlogon pipe. This version
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uses an ntlmssp bind to get the session key.
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****************************************************************************/
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NTSTATUS cli_rpc_pipe_open_ntlmssp_auth_schannel(struct cli_state *cli,
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const struct ndr_syntax_id *interface,
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enum dcerpc_transport_t transport,
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enum dcerpc_AuthLevel auth_level,
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const char *domain,
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const char *username,
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const char *password,
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struct rpc_pipe_client **presult)
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{
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uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
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struct rpc_pipe_client *netlogon_pipe = NULL;
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struct rpc_pipe_client *result = NULL;
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NTSTATUS status;
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status = get_schannel_session_key_auth_ntlmssp(
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cli, domain, username, password, &neg_flags, &netlogon_pipe);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0,("cli_rpc_pipe_open_ntlmssp_auth_schannel: failed to get schannel session "
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"key from server %s for domain %s.\n",
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smbXcli_conn_remote_name(cli->conn), domain ));
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return status;
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}
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status = cli_rpc_pipe_open_schannel_with_key(
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cli, interface, transport, auth_level, domain, &netlogon_pipe->dc,
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&result);
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/* Now we've bound using the session key we can close the netlog pipe. */
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TALLOC_FREE(netlogon_pipe);
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if (NT_STATUS_IS_OK(status)) {
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*presult = result;
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}
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return status;
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}
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/****************************************************************************
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Open a named pipe to an SMB server and bind using schannel (bind type 68).
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Fetch the session key ourselves using a temporary netlogon pipe.
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****************************************************************************/
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NTSTATUS cli_rpc_pipe_open_schannel(struct cli_state *cli,
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const struct ndr_syntax_id *interface,
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enum dcerpc_transport_t transport,
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enum dcerpc_AuthLevel auth_level,
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const char *domain,
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struct rpc_pipe_client **presult)
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{
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uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
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struct rpc_pipe_client *netlogon_pipe = NULL;
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struct rpc_pipe_client *result = NULL;
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NTSTATUS status;
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status = get_schannel_session_key(cli, domain, &neg_flags,
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&netlogon_pipe);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0,("cli_rpc_pipe_open_schannel: failed to get schannel session "
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"key from server %s for domain %s.\n",
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smbXcli_conn_remote_name(cli->conn), domain ));
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return status;
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}
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status = cli_rpc_pipe_open_schannel_with_key(
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cli, interface, transport, auth_level, domain, &netlogon_pipe->dc,
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&result);
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/* Now we've bound using the session key we can close the netlog pipe. */
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TALLOC_FREE(netlogon_pipe);
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if (NT_STATUS_IS_OK(status)) {
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*presult = result;
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}
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return status;
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}
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/****************************************************************************
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Open a netlogon pipe and get the schannel session key.
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Now exposed to external callers.
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****************************************************************************/
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NTSTATUS get_schannel_session_key(struct cli_state *cli,
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const char *domain,
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uint32 *pneg_flags,
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struct rpc_pipe_client **presult)
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{
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struct rpc_pipe_client *netlogon_pipe = NULL;
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NTSTATUS status;
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status = cli_rpc_pipe_open_noauth(cli, &ndr_table_netlogon.syntax_id,
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&netlogon_pipe);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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status = get_schannel_session_key_common(netlogon_pipe, cli, domain,
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pneg_flags);
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if (!NT_STATUS_IS_OK(status)) {
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TALLOC_FREE(netlogon_pipe);
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return status;
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}
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*presult = netlogon_pipe;
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return NT_STATUS_OK;
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}
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