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
|
/*
Unix SMB/CIFS implementation.
SMB2 client negprot handling
Copyright (C) Andrew Tridgell 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 "libcli/raw/libcliraw.h"
#include "libcli/raw/raw_proto.h"
#include "libcli/smb2/smb2.h"
#include "libcli/smb2/smb2_calls.h"
#include "librpc/ndr/libndr.h"
/*
send a negprot request
*/
struct smb2_request *smb2_negprot_send(struct smb2_transport *transport,
struct smb2_negprot *io)
{
struct smb2_request *req;
uint16_t size = 0x24 + io->in.dialect_count*2;
enum ndr_err_code ndr_err;
int i;
req = smb2_request_init(transport, SMB2_OP_NEGPROT, size, false, 0);
if (req == NULL) return NULL;
SSVAL(req->out.body, 0x00, 0x24);
SSVAL(req->out.body, 0x02, io->in.dialect_count);
SSVAL(req->out.body, 0x04, io->in.security_mode);
SSVAL(req->out.body, 0x06, io->in.reserved);
SIVAL(req->out.body, 0x08, io->in.capabilities);
ndr_err = smbcli_push_guid(req->out.body, 0x0C, &io->in.client_guid);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
talloc_free(req);
return NULL;
}
smbcli_push_nttime(req->out.body, 0x1C, io->in.start_time);
for (i=0;i<io->in.dialect_count;i++) {
SSVAL(req->out.body, 0x24 + i*2, io->in.dialects[i]);
}
smb2_transport_send(req);
return req;
}
/*
recv a negprot reply
*/
NTSTATUS smb2_negprot_recv(struct smb2_request *req, TALLOC_CTX *mem_ctx,
struct smb2_negprot *io)
{
NTSTATUS status;
enum ndr_err_code ndr_err;
if (!smb2_request_receive(req) ||
smb2_request_is_error(req)) {
return smb2_request_destroy(req);
}
SMB2_CHECK_PACKET_RECV(req, 0x40, true);
io->out.security_mode = SVAL(req->in.body, 0x02);
io->out.dialect_revision = SVAL(req->in.body, 0x04);
io->out.reserved = SVAL(req->in.body, 0x06);
ndr_err = smbcli_pull_guid(req->in.body, 0x08, &io->in.client_guid);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
smb2_request_destroy(req);
return NT_STATUS_INTERNAL_ERROR;
}
io->out.capabilities = IVAL(req->in.body, 0x18);
io->out.max_transact_size = IVAL(req->in.body, 0x1C);
io->out.max_read_size = IVAL(req->in.body, 0x20);
io->out.max_write_size = IVAL(req->in.body, 0x24);
io->out.system_time = smbcli_pull_nttime(req->in.body, 0x28);
io->out.server_start_time = smbcli_pull_nttime(req->in.body, 0x30);
io->out.reserved2 = IVAL(req->in.body, 0x3C);
status = smb2_pull_o16s16_blob(&req->in, mem_ctx, req->in.body+0x38, &io->out.secblob);
if (!NT_STATUS_IS_OK(status)) {
smb2_request_destroy(req);
return status;
}
return smb2_request_destroy(req);
}
/*
sync negprot request
*/
NTSTATUS smb2_negprot(struct smb2_transport *transport,
TALLOC_CTX *mem_ctx, struct smb2_negprot *io)
{
struct smb2_request *req = smb2_negprot_send(transport, io);
return smb2_negprot_recv(req, mem_ctx, io);
}
|
