2 Unix SMB/CIFS implementation.
5 Copyright (C) Stefan Metzmacher 2009
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include "smbd/smbd.h"
23 #include "smbd/globals.h"
24 #include "../libcli/smb/smb_common.h"
27 * this is the entry point if SMB2 is selected via
28 * the SMB negprot and the "SMB 2.002" dialect.
30 void reply_smb2002(struct smb_request *req, uint16_t choice)
36 size_t len = 4 + SMB2_HDR_BODY + 0x24 + 2;
38 smb2_inbuf = talloc_zero_array(talloc_tos(), uint8_t, len);
39 if (smb2_inbuf == NULL) {
40 DEBUG(0, ("Could not push spnego blob\n"));
41 reply_nterror(req, NT_STATUS_NO_MEMORY);
44 smb2_hdr = smb2_inbuf + 4;
45 smb2_body = smb2_hdr + SMB2_HDR_BODY;
46 smb2_dyn = smb2_body + 0x24;
48 SIVAL(smb2_hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
49 SIVAL(smb2_hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
51 SSVAL(smb2_body, 0x00, 0x0024); /* struct size */
52 SSVAL(smb2_body, 0x02, 0x0001); /* dialect count */
54 SSVAL(smb2_dyn, 0x00, SMB2_DIALECT_REVISION_202);
58 smbd_smb2_first_negprot(req->sconn, smb2_inbuf, len);
62 NTSTATUS smbd_smb2_request_process_negprot(struct smbd_smb2_request *req)
64 const uint8_t *inbody;
65 const uint8_t *indyn = NULL;
66 int i = req->current_idx;
69 DATA_BLOB negprot_spnego_blob;
70 uint16_t security_offset;
71 DATA_BLOB security_buffer;
72 size_t expected_body_size = 0x24;
74 size_t expected_dyn_size = 0;
76 uint16_t security_mode;
77 uint16_t dialect_count;
79 uint32_t capabilities;
80 enum protocol_types protocol = PROTOCOL_NONE;
82 uint32_t max_trans = lp_smb2_max_trans();
83 uint32_t max_read = lp_smb2_max_read();
84 uint32_t max_write = lp_smb2_max_write();
86 /* TODO: drop the connection with INVALID_PARAMETER */
88 if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
89 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
92 inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
94 body_size = SVAL(inbody, 0x00);
95 if (body_size != expected_body_size) {
96 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
99 dialect_count = SVAL(inbody, 0x02);
100 if (dialect_count == 0) {
101 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
104 expected_dyn_size = dialect_count * 2;
105 if (req->in.vector[i+2].iov_len < expected_dyn_size) {
106 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
108 indyn = (const uint8_t *)req->in.vector[i+2].iov_base;
110 for (c=0; protocol == PROTOCOL_NONE && c < dialect_count; c++) {
111 dialect = SVAL(indyn, c*2);
112 if (dialect == SMB2_DIALECT_REVISION_202) {
113 protocol = PROTOCOL_SMB2_02;
118 if (protocol == PROTOCOL_NONE) {
119 return smbd_smb2_request_error(req, NT_STATUS_NOT_SUPPORTED);
122 set_Protocol(protocol);
124 if (get_remote_arch() != RA_SAMBA) {
125 set_remote_arch(RA_VISTA);
128 /* negprot_spnego() returns a the server guid in the first 16 bytes */
129 negprot_spnego_blob = negprot_spnego(req, req->sconn);
130 if (negprot_spnego_blob.data == NULL) {
131 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
134 if (negprot_spnego_blob.length < 16) {
135 return smbd_smb2_request_error(req, NT_STATUS_INTERNAL_ERROR);
138 security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
139 if (lp_server_signing() == Required) {
140 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
144 if (lp_host_msdfs()) {
145 capabilities |= SMB2_CAP_DFS;
149 * Unless we implement SMB2_CAP_LARGE_MTU,
150 * 0x10000 (65536) is the maximum allowed message size
154 max_trans = MIN(max_limit, max_trans);
155 max_read = MIN(max_limit, max_read);
156 max_write = MIN(max_limit, max_write);
158 security_offset = SMB2_HDR_BODY + 0x40;
161 /* Try SPNEGO auth... */
162 security_buffer = data_blob_const(negprot_spnego_blob.data + 16,
163 negprot_spnego_blob.length - 16);
165 /* for now we want raw NTLMSSP */
166 security_buffer = data_blob_const(NULL, 0);
169 outbody = data_blob_talloc(req->out.vector, NULL, 0x40);
170 if (outbody.data == NULL) {
171 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
174 SSVAL(outbody.data, 0x00, 0x40 + 1); /* struct size */
175 SSVAL(outbody.data, 0x02,
176 security_mode); /* security mode */
177 SSVAL(outbody.data, 0x04, dialect); /* dialect revision */
178 SSVAL(outbody.data, 0x06, 0); /* reserved */
179 memcpy(outbody.data + 0x08,
180 negprot_spnego_blob.data, 16); /* server guid */
181 SIVAL(outbody.data, 0x18,
182 capabilities); /* capabilities */
183 SIVAL(outbody.data, 0x1C, max_trans); /* max transact size */
184 SIVAL(outbody.data, 0x20, max_trans); /* max read size */
185 SIVAL(outbody.data, 0x24, max_trans); /* max write size */
186 SBVAL(outbody.data, 0x28, 0); /* system time */
187 SBVAL(outbody.data, 0x30, 0); /* server start time */
188 SSVAL(outbody.data, 0x38,
189 security_offset); /* security buffer offset */
190 SSVAL(outbody.data, 0x3A,
191 security_buffer.length); /* security buffer length */
192 SIVAL(outbody.data, 0x3C, 0); /* reserved */
194 outdyn = security_buffer;
196 req->sconn->using_smb2 = true;
198 return smbd_smb2_request_done(req, outbody, &outdyn);