1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
/*
* Unix SMB/CIFS implementation.
* RPC Pipe client / server routines
* Largely rewritten by Jeremy Allison 2005.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "../librpc/gen_ndr/ndr_schannel.h"
#include "../librpc/gen_ndr/ndr_netlogon.h"
#include "../libcli/auth/schannel.h"
#include "rpc_client/cli_netlogon.h"
#include "rpc_client/cli_pipe.h"
#include "librpc/gen_ndr/ndr_dcerpc.h"
#include "librpc/rpc/dcerpc.h"
#include "passdb.h"
#include "libsmb/libsmb.h"
#include "auth/gensec/gensec.h"
#include "../libcli/smb/smbXcli_base.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_CLI
/****************************************************************************
Get a the schannel session key out of an already opened netlogon pipe.
****************************************************************************/
static NTSTATUS get_schannel_session_key_common(struct rpc_pipe_client *netlogon_pipe,
struct cli_state *cli,
const char *domain,
uint32 *pneg_flags)
{
enum netr_SchannelType sec_chan_type = 0;
unsigned char machine_pwd[16];
const char *machine_account;
NTSTATUS status;
/* Get the machine account credentials from secrets.tdb. */
if (!get_trust_pw_hash(domain, machine_pwd, &machine_account,
&sec_chan_type))
{
DEBUG(0, ("get_schannel_session_key: could not fetch "
"trust account password for domain '%s'\n",
domain));
return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
}
status = rpccli_netlogon_setup_creds(netlogon_pipe,
smbXcli_conn_remote_name(cli->conn), /* server name */
domain, /* domain */
lp_netbios_name(), /* client name */
machine_account, /* machine account name */
machine_pwd,
sec_chan_type,
pneg_flags);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("get_schannel_session_key_common: "
"rpccli_netlogon_setup_creds failed with result %s "
"to server %s, domain %s, machine account %s.\n",
nt_errstr(status), smbXcli_conn_remote_name(cli->conn), domain,
machine_account ));
return status;
}
if (((*pneg_flags) & NETLOGON_NEG_SCHANNEL) == 0) {
DEBUG(3, ("get_schannel_session_key: Server %s did not offer schannel\n",
smbXcli_conn_remote_name(cli->conn)));
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
return NT_STATUS_OK;
}
/****************************************************************************
Open a named pipe to an SMB server and bind using schannel (bind type 68).
Fetch the session key ourselves using a temporary netlogon pipe. This
version uses an ntlmssp auth bound netlogon pipe to get the key.
****************************************************************************/
static NTSTATUS get_schannel_session_key_auth_ntlmssp(struct cli_state *cli,
const char *domain,
const char *username,
const char *password,
uint32 *pneg_flags,
struct rpc_pipe_client **presult)
{
struct rpc_pipe_client *netlogon_pipe = NULL;
NTSTATUS status;
status = cli_rpc_pipe_open_spnego(
cli, &ndr_table_netlogon, NCACN_NP,
GENSEC_OID_NTLMSSP,
DCERPC_AUTH_LEVEL_PRIVACY,
smbXcli_conn_remote_name(cli->conn),
domain, username, password, &netlogon_pipe);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
status = get_schannel_session_key_common(netlogon_pipe, cli, domain,
pneg_flags);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(netlogon_pipe);
return status;
}
*presult = netlogon_pipe;
return NT_STATUS_OK;
}
/****************************************************************************
Open a named pipe to an SMB server and bind using schannel (bind type 68).
Fetch the session key ourselves using a temporary netlogon pipe. This version
uses an ntlmssp bind to get the session key.
****************************************************************************/
NTSTATUS cli_rpc_pipe_open_ntlmssp_auth_schannel(struct cli_state *cli,
const struct ndr_syntax_id *interface,
enum dcerpc_transport_t transport,
enum dcerpc_AuthLevel auth_level,
const char *domain,
const char *username,
const char *password,
struct rpc_pipe_client **presult)
{
uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
struct rpc_pipe_client *netlogon_pipe = NULL;
struct rpc_pipe_client *result = NULL;
NTSTATUS status;
status = get_schannel_session_key_auth_ntlmssp(
cli, domain, username, password, &neg_flags, &netlogon_pipe);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("cli_rpc_pipe_open_ntlmssp_auth_schannel: failed to get schannel session "
"key from server %s for domain %s.\n",
smbXcli_conn_remote_name(cli->conn), domain ));
return status;
}
status = cli_rpc_pipe_open_schannel_with_key(
cli, interface, transport, auth_level, domain, &netlogon_pipe->dc,
&result);
/* Now we've bound using the session key we can close the netlog pipe. */
TALLOC_FREE(netlogon_pipe);
if (NT_STATUS_IS_OK(status)) {
*presult = result;
}
return status;
}
/****************************************************************************
Open a named pipe to an SMB server and bind using schannel (bind type 68).
Fetch the session key ourselves using a temporary netlogon pipe.
****************************************************************************/
NTSTATUS cli_rpc_pipe_open_schannel(struct cli_state *cli,
const struct ndr_syntax_id *interface,
enum dcerpc_transport_t transport,
enum dcerpc_AuthLevel auth_level,
const char *domain,
struct rpc_pipe_client **presult)
{
uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
struct rpc_pipe_client *netlogon_pipe = NULL;
struct rpc_pipe_client *result = NULL;
NTSTATUS status;
status = get_schannel_session_key(cli, domain, &neg_flags,
&netlogon_pipe);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("cli_rpc_pipe_open_schannel: failed to get schannel session "
"key from server %s for domain %s.\n",
smbXcli_conn_remote_name(cli->conn), domain ));
return status;
}
status = cli_rpc_pipe_open_schannel_with_key(
cli, interface, transport, auth_level, domain, &netlogon_pipe->dc,
&result);
/* Now we've bound using the session key we can close the netlog pipe. */
TALLOC_FREE(netlogon_pipe);
if (NT_STATUS_IS_OK(status)) {
*presult = result;
}
return status;
}
/****************************************************************************
Open a netlogon pipe and get the schannel session key.
Now exposed to external callers.
****************************************************************************/
NTSTATUS get_schannel_session_key(struct cli_state *cli,
const char *domain,
uint32 *pneg_flags,
struct rpc_pipe_client **presult)
{
struct rpc_pipe_client *netlogon_pipe = NULL;
NTSTATUS status;
status = cli_rpc_pipe_open_noauth(cli, &ndr_table_netlogon.syntax_id,
&netlogon_pipe);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
status = get_schannel_session_key_common(netlogon_pipe, cli, domain,
pneg_flags);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(netlogon_pipe);
return status;
}
*presult = netlogon_pipe;
return NT_STATUS_OK;
}
|
