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/globals.h"
23 #include "../source4/libcli/smb2/smb2_constants.h"
25 static NTSTATUS smbd_smb2_session_setup(struct smbd_smb2_request *req,
26 uint64_t in_session_id,
27 DATA_BLOB in_security_buffer,
28 DATA_BLOB *out_security_buffer,
29 uint64_t *out_session_id);
31 NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *req)
34 const uint8_t *inbody;
35 int i = req->current_idx;
39 size_t expected_body_size = 0x19;
41 uint64_t in_session_id;
42 uint16_t in_security_offset;
43 uint16_t in_security_length;
44 DATA_BLOB in_security_buffer;
45 uint64_t out_session_id;
46 uint16_t out_security_offset;
47 DATA_BLOB out_security_buffer;
50 inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
52 if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
53 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
56 inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
58 body_size = SVAL(inbody, 0x00);
59 if (body_size != expected_body_size) {
60 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
63 in_security_offset = SVAL(inbody, 0x0C);
64 in_security_length = SVAL(inbody, 0x0E);
66 if (in_security_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
67 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
70 if (in_security_length > req->in.vector[i+2].iov_len) {
71 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
74 in_session_id = BVAL(inhdr, SMB2_HDR_SESSION_ID);
75 in_security_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
76 in_security_buffer.length = in_security_length;
78 status = smbd_smb2_session_setup(req,
83 if (!NT_STATUS_IS_OK(status) &&
84 !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
85 status = nt_status_squash(status);
86 return smbd_smb2_request_error(req, status);
89 out_security_offset = SMB2_HDR_BODY + 0x08;
91 outhdr = (uint8_t *)req->out.vector[i].iov_base;
93 outbody = data_blob_talloc(req->out.vector, NULL, 0x08);
94 if (outbody.data == NULL) {
95 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
98 SBVAL(outhdr, SMB2_HDR_SESSION_ID, out_session_id);
100 SSVAL(outbody.data, 0x00, 0x08 + 1); /* struct size */
101 SSVAL(outbody.data, 0x02, 0); /* session flags */
102 SSVAL(outbody.data, 0x04,
103 out_security_offset); /* security buffer offset */
104 SSVAL(outbody.data, 0x06,
105 out_security_buffer.length); /* security buffer length */
107 outdyn = out_security_buffer;
109 return smbd_smb2_request_done_ex(req, status, outbody, &outdyn);
112 static int smbd_smb2_session_destructor(struct smbd_smb2_session *session)
114 if (session->conn == NULL) {
118 /* first free all tcons */
119 while (session->tcons.list) {
120 talloc_free(session->tcons.list);
123 idr_remove(session->conn->smb2.sessions.idtree, session->vuid);
124 DLIST_REMOVE(session->conn->smb2.sessions.list, session);
127 session->status = NT_STATUS_USER_SESSION_DELETED;
128 session->conn = NULL;
133 static NTSTATUS smbd_smb2_session_setup(struct smbd_smb2_request *req,
134 uint64_t in_session_id,
135 DATA_BLOB in_security_buffer,
136 DATA_BLOB *out_security_buffer,
137 uint64_t *out_session_id)
139 struct smbd_smb2_session *session;
142 if (in_session_id == 0) {
145 /* create a new session */
146 session = talloc_zero(req->conn, struct smbd_smb2_session);
147 if (session == NULL) {
148 return NT_STATUS_NO_MEMORY;
150 session->status = NT_STATUS_MORE_PROCESSING_REQUIRED;
151 id = idr_get_new_random(req->conn->smb2.sessions.idtree,
153 req->conn->smb2.sessions.limit);
155 return NT_STATUS_INSUFFICIENT_RESOURCES;
159 session->tcons.idtree = idr_init(session);
160 if (session->tcons.idtree == NULL) {
161 return NT_STATUS_NO_MEMORY;
163 session->tcons.limit = 0x00FFFFFF;
164 session->tcons.list = NULL;
166 DLIST_ADD_END(req->conn->smb2.sessions.list, session,
167 struct smbd_smb2_session *);
168 session->conn = req->conn;
169 talloc_set_destructor(session, smbd_smb2_session_destructor);
173 /* lookup an existing session */
174 p = idr_find(req->conn->smb2.sessions.idtree, in_session_id);
176 return NT_STATUS_USER_SESSION_DELETED;
178 session = talloc_get_type_abort(p, struct smbd_smb2_session);
181 if (NT_STATUS_IS_OK(session->status)) {
182 return NT_STATUS_REQUEST_NOT_ACCEPTED;
185 if (session->auth_ntlmssp_state == NULL) {
186 status = auth_ntlmssp_start(&session->auth_ntlmssp_state);
187 if (!NT_STATUS_IS_OK(status)) {
192 status = auth_ntlmssp_update(session->auth_ntlmssp_state,
194 out_security_buffer);
195 if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
197 } else if (NT_STATUS_IS_OK(status)) {
198 /* TODO: setup session key for signing */
199 session->status = NT_STATUS_OK;
201 * we attach the session to the request
202 * so that the response can be signed
204 req->session = session;
209 *out_session_id = session->vuid;
213 NTSTATUS smbd_smb2_request_check_session(struct smbd_smb2_request *req)
215 const uint8_t *inhdr;
216 int i = req->current_idx;
217 uint64_t in_session_id;
219 struct smbd_smb2_session *session;
221 inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
223 in_session_id = BVAL(inhdr, SMB2_HDR_SESSION_ID);
225 /* lookup an existing session */
226 p = idr_find(req->conn->smb2.sessions.idtree, in_session_id);
228 return NT_STATUS_USER_SESSION_DELETED;
230 session = talloc_get_type_abort(p, struct smbd_smb2_session);
232 if (!NT_STATUS_IS_OK(session->status)) {
233 return NT_STATUS_ACCESS_DENIED;
236 req->session = session;
240 NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req)
242 const uint8_t *inbody;
243 int i = req->current_idx;
245 size_t expected_body_size = 0x04;
248 if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
249 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
252 inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
254 body_size = SVAL(inbody, 0x00);
255 if (body_size != expected_body_size) {
256 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
260 * TODO: cancel all outstanding requests on the session
261 * and delete all tree connections.
263 smbd_smb2_session_destructor(req->session);
265 * we may need to sign the response, so we need to keep
266 * the session until the response is sent to the wire.
268 talloc_steal(req, req->session);
270 outbody = data_blob_talloc(req->out.vector, NULL, 0x04);
271 if (outbody.data == NULL) {
272 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
275 SSVAL(outbody.data, 0x00, 0x04); /* struct size */
276 SSVAL(outbody.data, 0x02, 0); /* reserved */
278 return smbd_smb2_request_done(req, outbody, NULL);