summaryrefslogtreecommitdiff
path: root/source4/libcli/raw/rawnegotiate.c
blob: fc7725cc55d824c2b8745ecd92b65a6346ae7a0c (plain)
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
/* 
   Unix SMB/CIFS implementation.

   SMB client negotiate context management functions

   Copyright (C) Andrew Tridgell 1994-2005
   Copyright (C) James Myers 2003 <myersjj@samba.org>
   
   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 "system/time.h"
#include "param/param.h"

static const struct {
	enum protocol_types prot;
	const char *name;
} prots[] = {
	{PROTOCOL_CORE,"PC NETWORK PROGRAM 1.0"},
	{PROTOCOL_COREPLUS,"MICROSOFT NETWORKS 1.03"},
	{PROTOCOL_LANMAN1,"MICROSOFT NETWORKS 3.0"},
	{PROTOCOL_LANMAN1,"LANMAN1.0"},
	{PROTOCOL_LANMAN1,"Windows for Workgroups 3.1a"},
	{PROTOCOL_LANMAN2,"LM1.2X002"},
	{PROTOCOL_LANMAN2,"DOS LANMAN2.1"},
	{PROTOCOL_LANMAN2,"LANMAN2.1"},
	{PROTOCOL_LANMAN2,"Samba"},
	{PROTOCOL_NT1,"NT LANMAN 1.0"},
	{PROTOCOL_NT1,"NT LM 0.12"},
};

/*
  Send a negprot command.
*/
struct smbcli_request *smb_raw_negotiate_send(struct smbcli_transport *transport, 
					      bool unicode,
					      int maxprotocol)
{
	struct smbcli_request *req;
	int i;
	uint16_t flags2 = 0;

	req = smbcli_request_setup_transport(transport, SMBnegprot, 0, 0);
	if (!req) {
		return NULL;
	}

	flags2 |= FLAGS2_32_BIT_ERROR_CODES;
	if (unicode) {
		flags2 |= FLAGS2_UNICODE_STRINGS;
	}
	flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
	flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
	flags2 |= FLAGS2_IS_LONG_NAME;

	if (transport->options.use_spnego) {
		flags2 |= FLAGS2_EXTENDED_SECURITY;
	}

	SSVAL(req->out.hdr,HDR_FLG2, flags2);

	/* setup the protocol strings */
	for (i=0; i < ARRAY_SIZE(prots) && prots[i].prot <= maxprotocol; i++) {
		smbcli_req_append_bytes(req, (const uint8_t *)"\2", 1);
		smbcli_req_append_string(req, prots[i].name, STR_TERMINATE | STR_ASCII);
	}

	if (!smbcli_request_send(req)) {
		smbcli_request_destroy(req);
		return NULL;
	}

	return req;
}

/*
 Send a negprot command.
*/
NTSTATUS smb_raw_negotiate_recv(struct smbcli_request *req)
{
	struct smbcli_transport *transport = req->transport;
	int protocol;

	if (!smbcli_request_receive(req) ||
	    smbcli_request_is_error(req)) {
		return smbcli_request_destroy(req);
	}

	SMBCLI_CHECK_MIN_WCT(req, 1);

	protocol = SVALS(req->in.vwv, VWV(0));

	if (protocol >= ARRAY_SIZE(prots) || protocol < 0) {
		req->status = NT_STATUS_UNSUCCESSFUL;
		return smbcli_request_destroy(req);
	}

	transport->negotiate.protocol = prots[protocol].prot;

	if (transport->negotiate.protocol >= PROTOCOL_NT1) {
		NTTIME ntt;

		/* NT protocol */
		SMBCLI_CHECK_WCT(req, 17);
		transport->negotiate.sec_mode = CVAL(req->in.vwv,VWV(1));
		transport->negotiate.max_mux  = SVAL(req->in.vwv,VWV(1)+1);
		transport->negotiate.max_xmit = IVAL(req->in.vwv,VWV(3)+1);
		transport->negotiate.sesskey  = IVAL(req->in.vwv,VWV(7)+1);
		transport->negotiate.capabilities = IVAL(req->in.vwv,VWV(9)+1);

		/* this time arrives in real GMT */
		ntt = smbcli_pull_nttime(req->in.vwv, VWV(11)+1);
		transport->negotiate.server_time = nt_time_to_unix(ntt);		
		transport->negotiate.server_zone = SVALS(req->in.vwv,VWV(15)+1) * 60;
		transport->negotiate.key_len = CVAL(req->in.vwv,VWV(16)+1);

		if (transport->negotiate.capabilities & CAP_EXTENDED_SECURITY) {
			if (req->in.data_size < 16) {
				goto failed;
			}
			transport->negotiate.server_guid = smbcli_req_pull_blob(req, transport, req->in.data, 16);
			transport->negotiate.secblob = smbcli_req_pull_blob(req, transport, req->in.data + 16, req->in.data_size - 16);
		} else {
			if (req->in.data_size < (transport->negotiate.key_len)) {
				goto failed;
			}
			transport->negotiate.secblob = smbcli_req_pull_blob(req, transport, req->in.data, transport->negotiate.key_len);
			smbcli_req_pull_string(req, transport, &transport->negotiate.server_domain,
					    req->in.data+transport->negotiate.key_len,
					    req->in.data_size-transport->negotiate.key_len, STR_UNICODE|STR_NOALIGN);
			/* here comes the server name */
		}

		if (transport->negotiate.capabilities & CAP_RAW_MODE) {
			transport->negotiate.readbraw_supported = true;
			transport->negotiate.writebraw_supported = true;
		}
	} else if (transport->negotiate.protocol >= PROTOCOL_LANMAN1) {
		SMBCLI_CHECK_WCT(req, 13);
		transport->negotiate.sec_mode = SVAL(req->in.vwv,VWV(1));
		transport->negotiate.max_xmit = SVAL(req->in.vwv,VWV(2));
		transport->negotiate.sesskey =  IVAL(req->in.vwv,VWV(6));
		transport->negotiate.server_zone = SVALS(req->in.vwv,VWV(10)) * 60;
		
		/* this time is converted to GMT by raw_pull_dos_date */
		transport->negotiate.server_time = raw_pull_dos_date(transport,
								     req->in.vwv+VWV(8));
		if ((SVAL(req->in.vwv,VWV(5)) & 0x1)) {
			transport->negotiate.readbraw_supported = 1;
		}
		if ((SVAL(req->in.vwv,VWV(5)) & 0x2)) {
			transport->negotiate.writebraw_supported = 1;
		}
		transport->negotiate.secblob = smbcli_req_pull_blob(req, transport, 
								 req->in.data, req->in.data_size);
	} else {
		/* the old core protocol */
		transport->negotiate.sec_mode = 0;
		transport->negotiate.server_time = time(NULL);
		transport->negotiate.max_xmit = transport->options.max_xmit;
		transport->negotiate.server_zone = get_time_zone(transport->negotiate.server_time);
	}

	/* a way to force ascii SMB */
	if (!transport->options.unicode) {
		transport->negotiate.capabilities &= ~CAP_UNICODE;
	}

	if (!transport->options.ntstatus_support) {
		transport->negotiate.capabilities &= ~CAP_STATUS32;
	}

failed:
	return smbcli_request_destroy(req);
}


/*
 Send a negprot command (sync interface)
*/
NTSTATUS smb_raw_negotiate(struct smbcli_transport *transport, bool unicode, int maxprotocol)
{
	struct smbcli_request *req = smb_raw_negotiate_send(transport, unicode, maxprotocol);
	return smb_raw_negotiate_recv(req);
}