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 = SVAL(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 idr_remove(session->conn->smb2.sessions.idtree, session->vuid);
119 DLIST_REMOVE(session->conn->smb2.sessions.list, session);
122 session->status = NT_STATUS_USER_SESSION_DELETED;
123 session->conn = NULL;
128 static NTSTATUS smbd_smb2_session_setup(struct smbd_smb2_request *req,
129 uint64_t in_session_id,
130 DATA_BLOB in_security_buffer,
131 DATA_BLOB *out_security_buffer,
132 uint64_t *out_session_id)
134 struct smbd_smb2_session *session;
137 if (in_session_id == 0) {
140 /* create a new session */
141 session = talloc_zero(req->conn, struct smbd_smb2_session);
142 if (session == NULL) {
143 return NT_STATUS_NO_MEMORY;
145 session->status = NT_STATUS_MORE_PROCESSING_REQUIRED;
146 id = idr_get_new_random(req->conn->smb2.sessions.idtree,
148 req->conn->smb2.sessions.limit);
150 return NT_STATUS_INSUFFICIENT_RESOURCES;
153 DLIST_ADD_END(req->conn->smb2.sessions.list, session,
154 struct smbd_smb2_session *);
155 session->conn = req->conn;
156 talloc_set_destructor(session, smbd_smb2_session_destructor);
160 /* lookup an existing session */
161 p = idr_find(req->conn->smb2.sessions.idtree, in_session_id);
163 return NT_STATUS_USER_SESSION_DELETED;
165 session = talloc_get_type_abort(p, struct smbd_smb2_session);
168 if (NT_STATUS_IS_OK(session->status)) {
169 return NT_STATUS_REQUEST_NOT_ACCEPTED;
172 if (session->auth_ntlmssp_state == NULL) {
173 status = auth_ntlmssp_start(&session->auth_ntlmssp_state);
174 if (!NT_STATUS_IS_OK(status)) {
179 status = auth_ntlmssp_update(session->auth_ntlmssp_state,
181 out_security_buffer);
182 if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
184 } else if (NT_STATUS_IS_OK(status)) {
185 /* TODO: setup session key for signing */
186 session->status = NT_STATUS_OK;
188 * we attach the session to the request
189 * so that the response can be signed
191 req->session = session;
196 *out_session_id = session->vuid;
200 NTSTATUS smbd_smb2_request_check_session(struct smbd_smb2_request *req)
202 const uint8_t *inhdr;
203 int i = req->current_idx;
204 uint64_t in_session_id;
206 struct smbd_smb2_session *session;
208 inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
210 in_session_id = SVAL(inhdr, SMB2_HDR_SESSION_ID);
212 /* lookup an existing session */
213 p = idr_find(req->conn->smb2.sessions.idtree, in_session_id);
215 return NT_STATUS_USER_SESSION_DELETED;
217 session = talloc_get_type_abort(p, struct smbd_smb2_session);
219 if (!NT_STATUS_IS_OK(session->status)) {
220 return NT_STATUS_ACCESS_DENIED;
223 req->session = session;
227 NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req)
229 const uint8_t *inbody;
230 int i = req->current_idx;
232 size_t expected_body_size = 0x04;
235 if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
236 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
239 inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
241 body_size = SVAL(inbody, 0x00);
242 if (body_size != expected_body_size) {
243 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
247 * TODO: cancel all outstanding requests on the session
248 * and delete all tree connections.
250 smbd_smb2_session_destructor(req->session);
252 * we may need to sign the response, so we need to keep
253 * the session until the response is sent to the wire.
255 talloc_steal(req, req->session);
257 outbody = data_blob_talloc(req->out.vector, NULL, 0x04);
258 if (outbody.data == NULL) {
259 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
262 SSVAL(outbody.data, 0x00, 0x04); /* struct size */
263 SSVAL(outbody.data, 0x02, 0); /* reserved */
265 return smbd_smb2_request_done(req, outbody, NULL);