2 Unix SMB2 implementation.
4 Copyright (C) Andrew Bartlett 2001-2005
5 Copyright (C) Stefan Metzmacher 2005
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 "auth/credentials/credentials.h"
23 #include "auth/gensec/gensec.h"
24 #include "libcli/raw/libcliraw.h"
25 #include "libcli/raw/raw_proto.h"
26 #include "libcli/smb2/smb2.h"
27 #include "libcli/smb2/smb2_calls.h"
28 #include "smb_server/smb_server.h"
29 #include "smb_server/service_smb_proto.h"
30 #include "smb_server/smb2/smb2_server.h"
31 #include "smbd/service_stream.h"
32 #include "param/param.h"
33 #include "librpc/ndr/libndr.h"
35 static NTSTATUS smb2srv_negprot_secblob(struct smb2srv_request *req, DATA_BLOB *_blob)
37 struct gensec_security *gensec_security;
38 DATA_BLOB null_data_blob = data_blob(NULL, 0);
41 struct cli_credentials *server_credentials;
43 nt_status = gensec_server_start(req,
44 req->smb_conn->connection->event.ctx,
45 req->smb_conn->lp_ctx,
46 req->smb_conn->connection->msg_ctx,
48 if (!NT_STATUS_IS_OK(nt_status)) {
49 DEBUG(0, ("Failed to start GENSEC: %s\n", nt_errstr(nt_status)));
50 smbsrv_terminate_connection(req->smb_conn, "Failed to start GENSEC\n");
54 server_credentials = cli_credentials_init(req);
55 if (!server_credentials) {
56 smbsrv_terminate_connection(req->smb_conn, "Failed to init server credentials\n");
57 return NT_STATUS_NO_MEMORY;
60 cli_credentials_set_conf(server_credentials, req->smb_conn->lp_ctx);
61 nt_status = cli_credentials_set_machine_account(server_credentials, req->smb_conn->lp_ctx);
62 if (!NT_STATUS_IS_OK(nt_status)) {
63 DEBUG(10, ("Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(nt_status)));
64 talloc_free(server_credentials);
65 server_credentials = NULL;
68 req->smb_conn->negotiate.server_credentials = talloc_steal(req->smb_conn, server_credentials);
70 gensec_set_target_service(gensec_security, "cifs");
72 gensec_set_credentials(gensec_security, server_credentials);
74 nt_status = gensec_start_mech_by_oid(gensec_security, GENSEC_OID_SPNEGO);
75 if (!NT_STATUS_IS_OK(nt_status)) {
76 DEBUG(0, ("Failed to start SPNEGO: %s\n", nt_errstr(nt_status)));
77 smbsrv_terminate_connection(req->smb_conn, "Failed to start SPNEGO\n");
81 nt_status = gensec_update(gensec_security, req, null_data_blob, &blob);
82 if (!NT_STATUS_IS_OK(nt_status) && !NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
83 DEBUG(0, ("Failed to get SPNEGO to give us the first token: %s\n", nt_errstr(nt_status)));
84 smbsrv_terminate_connection(req->smb_conn, "Failed to start SPNEGO - no first token\n");
92 static NTSTATUS smb2srv_negprot_backend(struct smb2srv_request *req, struct smb2_negprot *io)
95 struct timeval current_time;
96 struct timeval boot_time;
98 /* we only do one dialect for now */
99 if (io->in.dialect_count < 1) {
100 return NT_STATUS_NOT_SUPPORTED;
102 if (io->in.dialects[0] != 0 &&
103 io->in.dialects[0] != SMB2_DIALECT_REVISION) {
104 DEBUG(0,("Got unexpected SMB2 dialect %u\n", io->in.dialects[0]));
105 return NT_STATUS_NOT_SUPPORTED;
108 req->smb_conn->negotiate.protocol = PROTOCOL_SMB2;
110 current_time = timeval_current(); /* TODO: handle timezone?! */
111 boot_time = timeval_current(); /* TODO: fix me */
113 ZERO_STRUCT(io->out);
114 switch (lp_server_signing(req->smb_conn->lp_ctx)) {
115 case SMB_SIGNING_OFF:
116 io->out.security_mode = 0;
118 case SMB_SIGNING_SUPPORTED:
119 case SMB_SIGNING_AUTO:
120 io->out.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
122 case SMB_SIGNING_REQUIRED:
123 io->out.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED;
126 io->out.dialect_revision = SMB2_DIALECT_REVISION;
127 io->out.capabilities = 0;
128 io->out.max_transact_size = lp_parm_ulong(req->smb_conn->lp_ctx, NULL,
129 "smb2", "max transaction size", 0x10000);
130 io->out.max_read_size = lp_parm_ulong(req->smb_conn->lp_ctx, NULL,
131 "smb2", "max read size", 0x10000);
132 io->out.max_write_size = lp_parm_ulong(req->smb_conn->lp_ctx, NULL,
133 "smb2", "max write size", 0x10000);
134 io->out.system_time = timeval_to_nttime(¤t_time);
135 io->out.server_start_time = timeval_to_nttime(&boot_time);
136 io->out.reserved2 = 0;
137 status = smb2srv_negprot_secblob(req, &io->out.secblob);
138 NT_STATUS_NOT_OK_RETURN(status);
143 static void smb2srv_negprot_send(struct smb2srv_request *req, struct smb2_negprot *io)
146 enum ndr_err_code ndr_err;
148 if (NT_STATUS_IS_ERR(req->status)) {
149 smb2srv_send_error(req, req->status); /* TODO: is this correct? */
153 status = smb2srv_setup_reply(req, 0x40, true, io->out.secblob.length);
154 if (!NT_STATUS_IS_OK(status)) {
155 smbsrv_terminate_connection(req->smb_conn, nt_errstr(status));
160 SSVAL(req->out.body, 0x02, io->out.security_mode);
161 SIVAL(req->out.body, 0x04, io->out.dialect_revision);
162 SIVAL(req->out.body, 0x06, io->out.reserved);
163 ndr_err = smbcli_push_guid(req->out.body, 0x08, &io->out.server_guid);
164 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
165 smbsrv_terminate_connection(req->smb_conn, nt_errstr(status));
169 SIVAL(req->out.body, 0x18, io->out.capabilities);
170 SIVAL(req->out.body, 0x1C, io->out.max_transact_size);
171 SIVAL(req->out.body, 0x20, io->out.max_read_size);
172 SIVAL(req->out.body, 0x24, io->out.max_write_size);
173 push_nttime(req->out.body, 0x28, io->out.system_time);
174 push_nttime(req->out.body, 0x30, io->out.server_start_time);
175 SIVAL(req->out.body, 0x3C, io->out.reserved2);
176 status = smb2_push_o16s16_blob(&req->out, 0x38, io->out.secblob);
177 if (!NT_STATUS_IS_OK(status)) {
178 smbsrv_terminate_connection(req->smb_conn, nt_errstr(status));
183 smb2srv_send_reply(req);
186 void smb2srv_negprot_recv(struct smb2srv_request *req)
188 struct smb2_negprot *io;
190 enum ndr_err_code ndr_err;
192 if (req->in.body_size < 0x26) {
193 smb2srv_send_error(req, NT_STATUS_FOOBAR);
197 io = talloc(req, struct smb2_negprot);
199 smbsrv_terminate_connection(req->smb_conn, nt_errstr(NT_STATUS_NO_MEMORY));
204 io->in.dialect_count = SVAL(req->in.body, 0x02);
205 io->in.security_mode = SVAL(req->in.body, 0x04);
206 io->in.reserved = SVAL(req->in.body, 0x06);
207 io->in.capabilities = IVAL(req->in.body, 0x08);
208 ndr_err = smbcli_pull_guid(req->in.body, 0xC, &io->in.client_guid);
209 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
210 smbsrv_terminate_connection(req->smb_conn, nt_errstr(NT_STATUS_FOOBAR));
214 io->in.start_time = smbcli_pull_nttime(req->in.body, 0x1C);
216 io->in.dialects = talloc_array(req, uint16_t, io->in.dialect_count);
217 if (io->in.dialects == NULL) {
218 smbsrv_terminate_connection(req->smb_conn, nt_errstr(NT_STATUS_NO_MEMORY));
222 for (i=0;i<io->in.dialect_count;i++) {
223 io->in.dialects[i] = SVAL(req->in.body, 0x24+i*2);
226 req->status = smb2srv_negprot_backend(req, io);
228 if (req->control_flags & SMB2SRV_REQ_CTRL_FLAG_NOT_REPLY) {
232 smb2srv_negprot_send(req, io);
236 * reply to a SMB negprot request with dialect "SMB 2.002"
238 void smb2srv_reply_smb_negprot(struct smbsrv_request *smb_req)
240 struct smb2srv_request *req;
241 uint32_t body_fixed_size = 0x26;
243 req = talloc_zero(smb_req->smb_conn, struct smb2srv_request);
244 if (!req) goto nomem;
245 req->smb_conn = smb_req->smb_conn;
246 req->request_time = smb_req->request_time;
247 talloc_steal(req, smb_req);
249 req->in.size = NBT_HDR_SIZE+SMB2_HDR_BODY+body_fixed_size;
250 req->in.allocated = req->in.size;
251 req->in.buffer = talloc_array(req, uint8_t, req->in.allocated);
252 if (!req->in.buffer) goto nomem;
253 req->in.hdr = req->in.buffer + NBT_HDR_SIZE;
254 req->in.body = req->in.hdr + SMB2_HDR_BODY;
255 req->in.body_size = body_fixed_size;
256 req->in.dynamic = NULL;
258 smb2srv_setup_bufinfo(req);
260 SIVAL(req->in.hdr, 0, SMB2_MAGIC);
261 SSVAL(req->in.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
262 SSVAL(req->in.hdr, SMB2_HDR_EPOCH, 0);
263 SIVAL(req->in.hdr, SMB2_HDR_STATUS, 0);
264 SSVAL(req->in.hdr, SMB2_HDR_OPCODE, SMB2_OP_NEGPROT);
265 SSVAL(req->in.hdr, SMB2_HDR_CREDIT, 0);
266 SIVAL(req->in.hdr, SMB2_HDR_FLAGS, 0);
267 SIVAL(req->in.hdr, SMB2_HDR_NEXT_COMMAND, 0);
268 SBVAL(req->in.hdr, SMB2_HDR_MESSAGE_ID, 0);
269 SIVAL(req->in.hdr, SMB2_HDR_PID, 0);
270 SIVAL(req->in.hdr, SMB2_HDR_TID, 0);
271 SBVAL(req->in.hdr, SMB2_HDR_SESSION_ID, 0);
272 memset(req->in.hdr+SMB2_HDR_SIGNATURE, 0, 16);
274 /* this seems to be a bug, they use 0x24 but the length is 0x26 */
275 SSVAL(req->in.body, 0x00, 0x24);
277 SSVAL(req->in.body, 0x02, 1);
278 memset(req->in.body+0x04, 0, 32);
279 SSVAL(req->in.body, 0x24, 0);
281 smb2srv_negprot_recv(req);
284 smbsrv_terminate_connection(smb_req->smb_conn, nt_errstr(NT_STATUS_NO_MEMORY));