Line data Source code
1 : /*
2 : Unix SMB/CIFS implementation.
3 : Core SMB2 server
4 :
5 : Copyright (C) Stefan Metzmacher 2009
6 :
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.
11 :
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.
16 :
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/>.
19 : */
20 :
21 : #include "includes.h"
22 : #include "smbd/smbd.h"
23 : #include "smbd/globals.h"
24 : #include "../libcli/smb/smb_common.h"
25 : #include "../lib/util/tevent_ntstatus.h"
26 : #include "include/ntioctl.h"
27 : #include "smb2_ioctl_private.h"
28 : #include "librpc/gen_ndr/ioctl.h"
29 :
30 : #undef DBGC_CLASS
31 : #define DBGC_CLASS DBGC_SMB2
32 :
33 : static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
34 : struct tevent_context *ev,
35 : struct smbd_smb2_request *smb2req,
36 : struct files_struct *in_fsp,
37 : uint32_t in_ctl_code,
38 : DATA_BLOB in_input,
39 : uint32_t in_max_output,
40 : uint32_t in_flags);
41 : static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
42 : TALLOC_CTX *mem_ctx,
43 : DATA_BLOB *out_output,
44 : uint8_t *body_padding,
45 : bool *disconnect);
46 :
47 : static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq);
48 306730 : NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req)
49 : {
50 : NTSTATUS status;
51 : const uint8_t *inbody;
52 : uint32_t min_buffer_offset;
53 : uint32_t max_buffer_offset;
54 : uint32_t min_output_offset;
55 : uint32_t allowed_length_in;
56 : uint32_t allowed_length_out;
57 : uint32_t in_ctl_code;
58 : uint64_t in_file_id_persistent;
59 : uint64_t in_file_id_volatile;
60 306730 : struct files_struct *in_fsp = NULL;
61 : uint32_t in_input_offset;
62 : uint32_t in_input_length;
63 306730 : DATA_BLOB in_input_buffer = data_blob_null;
64 : uint32_t in_max_input_length;
65 : uint32_t in_output_offset;
66 : uint32_t in_output_length;
67 306730 : DATA_BLOB in_output_buffer = data_blob_null;
68 : uint32_t in_max_output_length;
69 : uint32_t in_flags;
70 : uint32_t data_length_in;
71 : uint32_t data_length_out;
72 : uint32_t data_length_tmp;
73 : uint32_t data_length_max;
74 : struct tevent_req *subreq;
75 :
76 306730 : status = smbd_smb2_request_verify_sizes(req, 0x39);
77 306730 : if (!NT_STATUS_IS_OK(status)) {
78 0 : return smbd_smb2_request_error(req, status);
79 : }
80 306730 : inbody = SMBD_SMB2_IN_BODY_PTR(req);
81 :
82 306730 : in_ctl_code = IVAL(inbody, 0x04);
83 306730 : in_file_id_persistent = BVAL(inbody, 0x08);
84 306730 : in_file_id_volatile = BVAL(inbody, 0x10);
85 306730 : in_input_offset = IVAL(inbody, 0x18);
86 306730 : in_input_length = IVAL(inbody, 0x1C);
87 306730 : in_max_input_length = IVAL(inbody, 0x20);
88 306730 : in_output_offset = IVAL(inbody, 0x24);
89 306730 : in_output_length = IVAL(inbody, 0x28);
90 306730 : in_max_output_length = IVAL(inbody, 0x2C);
91 306730 : in_flags = IVAL(inbody, 0x30);
92 :
93 306730 : min_buffer_offset = SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req);
94 306730 : max_buffer_offset = min_buffer_offset + SMBD_SMB2_IN_DYN_LEN(req);
95 306730 : min_output_offset = min_buffer_offset;
96 :
97 : /*
98 : * InputOffset (4 bytes): The offset, in bytes, from the beginning of
99 : * the SMB2 header to the input data buffer. If no input data is
100 : * required for the FSCTL/IOCTL command being issued, the client SHOULD
101 : * set this value to 0.<49>
102 : * <49> If no input data is required for the FSCTL/IOCTL command being
103 : * issued, Windows-based clients set this field to any value.
104 : */
105 306730 : allowed_length_in = 0;
106 306730 : if ((in_input_offset > 0) && (in_input_length > 0)) {
107 : uint32_t tmp_ofs;
108 :
109 304614 : if (in_input_offset < min_buffer_offset) {
110 0 : return smbd_smb2_request_error(req,
111 : NT_STATUS_INVALID_PARAMETER);
112 : }
113 304614 : if (in_input_offset > max_buffer_offset) {
114 0 : return smbd_smb2_request_error(req,
115 : NT_STATUS_INVALID_PARAMETER);
116 : }
117 304614 : allowed_length_in = max_buffer_offset - in_input_offset;
118 :
119 304614 : tmp_ofs = in_input_offset - min_buffer_offset;
120 304614 : in_input_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
121 304614 : in_input_buffer.data += tmp_ofs;
122 304614 : in_input_buffer.length = in_input_length;
123 304614 : min_output_offset += tmp_ofs;
124 304614 : min_output_offset += in_input_length;
125 : }
126 :
127 306730 : if (in_input_length > allowed_length_in) {
128 0 : return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
129 : }
130 :
131 306730 : allowed_length_out = 0;
132 306730 : if (in_output_offset > 0) {
133 304092 : if (in_output_offset < min_buffer_offset) {
134 0 : return smbd_smb2_request_error(req,
135 : NT_STATUS_INVALID_PARAMETER);
136 : }
137 304092 : if (in_output_offset > max_buffer_offset) {
138 0 : return smbd_smb2_request_error(req,
139 : NT_STATUS_INVALID_PARAMETER);
140 : }
141 304092 : allowed_length_out = max_buffer_offset - in_output_offset;
142 : }
143 :
144 306730 : if (in_output_length > allowed_length_out) {
145 0 : return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
146 : }
147 :
148 306730 : if (in_output_length > 0) {
149 : uint32_t tmp_ofs;
150 :
151 0 : if (in_output_offset < min_output_offset) {
152 0 : return smbd_smb2_request_error(req,
153 : NT_STATUS_INVALID_PARAMETER);
154 : }
155 :
156 0 : tmp_ofs = in_output_offset - min_buffer_offset;
157 0 : in_output_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
158 0 : in_output_buffer.data += tmp_ofs;
159 0 : in_output_buffer.length = in_output_length;
160 : }
161 :
162 : /*
163 : * verify the credits and avoid overflows
164 : * in_input_buffer.length and in_output_buffer.length
165 : * are already verified.
166 : */
167 306730 : data_length_in = in_input_buffer.length + in_output_buffer.length;
168 :
169 306730 : data_length_out = in_max_input_length;
170 306730 : data_length_tmp = UINT32_MAX - data_length_out;
171 306730 : if (data_length_tmp < in_max_output_length) {
172 0 : return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
173 : }
174 306730 : data_length_out += in_max_output_length;
175 :
176 306730 : data_length_max = MAX(data_length_in, data_length_out);
177 :
178 306730 : status = smbd_smb2_request_verify_creditcharge(req, data_length_max);
179 306730 : if (!NT_STATUS_IS_OK(status)) {
180 0 : return smbd_smb2_request_error(req, status);
181 : }
182 :
183 : /*
184 : * If the Flags field of the request is not SMB2_0_IOCTL_IS_FSCTL the
185 : * server MUST fail the request with STATUS_NOT_SUPPORTED.
186 : */
187 306730 : if (in_flags != SMB2_IOCTL_FLAG_IS_FSCTL) {
188 0 : return smbd_smb2_request_error(req, NT_STATUS_NOT_SUPPORTED);
189 : }
190 :
191 306730 : switch (in_ctl_code) {
192 9582 : case FSCTL_DFS_GET_REFERRALS:
193 : case FSCTL_DFS_GET_REFERRALS_EX:
194 : case FSCTL_PIPE_WAIT:
195 : case FSCTL_VALIDATE_NEGOTIATE_INFO_224:
196 : case FSCTL_VALIDATE_NEGOTIATE_INFO:
197 : case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
198 : case FSCTL_SMBTORTURE_FORCE_UNACKED_TIMEOUT:
199 : case FSCTL_SMBTORTURE_IOCTL_RESPONSE_BODY_PADDING8:
200 : case FSCTL_SMBTORTURE_GLOBAL_READ_RESPONSE_BODY_PADDING8:
201 : /*
202 : * Some SMB2 specific CtlCodes like FSCTL_DFS_GET_REFERRALS or
203 : * FSCTL_PIPE_WAIT does not take a file handle.
204 : *
205 : * If FileId in the SMB2 Header of the request is not
206 : * 0xFFFFFFFFFFFFFFFF, then the server MUST fail the request
207 : * with STATUS_INVALID_PARAMETER.
208 : */
209 9582 : if (in_file_id_persistent != UINT64_MAX ||
210 0 : in_file_id_volatile != UINT64_MAX) {
211 0 : return smbd_smb2_request_error(req,
212 : NT_STATUS_INVALID_PARAMETER);
213 : }
214 9582 : break;
215 297148 : default:
216 297148 : in_fsp = file_fsp_smb2(req, in_file_id_persistent,
217 : in_file_id_volatile);
218 297148 : if (in_fsp == NULL) {
219 6 : return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
220 : }
221 290513 : break;
222 : }
223 :
224 306724 : subreq = smbd_smb2_ioctl_send(req, req->sconn->ev_ctx,
225 : req, in_fsp,
226 : in_ctl_code,
227 : in_input_buffer,
228 : in_max_output_length,
229 : in_flags);
230 306724 : if (subreq == NULL) {
231 0 : return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
232 : }
233 :
234 : /*
235 : * If the FSCTL has gone async on a file handle, remember
236 : * to add it to the list of async requests we need to wait
237 : * for on file handle close.
238 : */
239 306724 : if (in_fsp != NULL && tevent_req_is_in_progress(subreq)) {
240 : bool ok;
241 :
242 295014 : ok = aio_add_req_to_fsp(in_fsp, subreq);
243 295014 : if (!ok) {
244 0 : return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
245 : }
246 : }
247 :
248 306724 : tevent_req_set_callback(subreq, smbd_smb2_request_ioctl_done, req);
249 :
250 306724 : return smbd_smb2_request_pending_queue(req, subreq, 1000);
251 : }
252 :
253 : /*
254 : * 3.3.4.4 Sending an Error Response
255 : * An error code other than one of the following indicates a failure:
256 : */
257 300095 : static bool smbd_smb2_ioctl_is_failure(uint32_t ctl_code, NTSTATUS status,
258 : size_t data_size)
259 : {
260 306724 : if (NT_STATUS_IS_OK(status)) {
261 294729 : return false;
262 : }
263 :
264 : /*
265 : * STATUS_BUFFER_OVERFLOW in a FSCTL_PIPE_TRANSCEIVE, FSCTL_PIPE_PEEK or
266 : * FSCTL_DFS_GET_REFERRALS Response specified in section 2.2.32.<153>
267 : */
268 5369 : if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)
269 0 : && ((ctl_code == FSCTL_PIPE_TRANSCEIVE)
270 0 : || (ctl_code == FSCTL_PIPE_PEEK)
271 0 : || (ctl_code == FSCTL_DFS_GET_REFERRALS))) {
272 0 : return false;
273 : }
274 :
275 : /*
276 : * Any status other than STATUS_SUCCESS in a FSCTL_SRV_COPYCHUNK or
277 : * FSCTL_SRV_COPYCHUNK_WRITE Response, when returning an
278 : * SRV_COPYCHUNK_RESPONSE as described in section 2.2.32.1.
279 : */
280 5372 : if (((ctl_code == FSCTL_SRV_COPYCHUNK)
281 5297 : || (ctl_code == FSCTL_SRV_COPYCHUNK_WRITE))
282 72 : && (data_size == sizeof(struct srv_copychunk_rsp))) {
283 66 : return false;
284 : }
285 :
286 5300 : return true;
287 : }
288 :
289 306724 : static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq)
290 : {
291 306724 : struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
292 : struct smbd_smb2_request);
293 : const uint8_t *inbody;
294 : DATA_BLOB outbody;
295 : DATA_BLOB outdyn;
296 : uint32_t in_ctl_code;
297 : uint64_t in_file_id_persistent;
298 : uint64_t in_file_id_volatile;
299 : uint32_t out_input_offset;
300 : uint32_t out_output_offset;
301 306724 : DATA_BLOB out_output_buffer = data_blob_null;
302 : NTSTATUS status;
303 : NTSTATUS error; /* transport error */
304 306724 : bool disconnect = false;
305 : uint16_t body_size;
306 306724 : uint8_t body_padding = 0;
307 :
308 306724 : status = smbd_smb2_ioctl_recv(subreq, req,
309 : &out_output_buffer,
310 : &body_padding,
311 : &disconnect);
312 :
313 306724 : DEBUG(10,("smbd_smb2_request_ioctl_done: smbd_smb2_ioctl_recv returned "
314 : "%u status %s\n",
315 : (unsigned int)out_output_buffer.length,
316 : nt_errstr(status) ));
317 :
318 306724 : TALLOC_FREE(subreq);
319 306724 : if (disconnect) {
320 0 : error = status;
321 0 : smbd_server_connection_terminate(req->xconn,
322 : nt_errstr(error));
323 409 : return;
324 : }
325 :
326 306724 : inbody = SMBD_SMB2_IN_BODY_PTR(req);
327 :
328 306724 : in_ctl_code = IVAL(inbody, 0x04);
329 306724 : in_file_id_persistent = BVAL(inbody, 0x08);
330 306724 : in_file_id_volatile = BVAL(inbody, 0x10);
331 :
332 306727 : if (smbd_smb2_ioctl_is_failure(in_ctl_code, status,
333 : out_output_buffer.length)) {
334 5303 : error = smbd_smb2_request_error(req, status);
335 5303 : if (!NT_STATUS_IS_OK(error)) {
336 0 : smbd_server_connection_terminate(req->xconn,
337 : nt_errstr(error));
338 0 : return;
339 : }
340 5300 : return;
341 : }
342 :
343 : /*
344 : * Only FSCTL_SMBTORTURE_IOCTL_RESPONSE_BODY_PADDING8
345 : * sets body_padding to a value different from 0.
346 : */
347 301421 : body_size = 0x30 + body_padding;
348 301421 : out_input_offset = SMB2_HDR_BODY + body_size;
349 301421 : out_output_offset = SMB2_HDR_BODY + body_size;
350 :
351 301421 : outbody = smbd_smb2_generate_outbody(req, body_size);
352 301421 : if (outbody.data == NULL) {
353 0 : error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
354 0 : if (!NT_STATUS_IS_OK(error)) {
355 0 : smbd_server_connection_terminate(req->xconn,
356 : nt_errstr(error));
357 0 : return;
358 : }
359 0 : return;
360 : }
361 :
362 301421 : SSVAL(outbody.data, 0x00, 0x30 + 1); /* struct size */
363 301421 : SSVAL(outbody.data, 0x02, 0); /* reserved */
364 301421 : SIVAL(outbody.data, 0x04,
365 : in_ctl_code); /* ctl code */
366 301421 : SBVAL(outbody.data, 0x08,
367 : in_file_id_persistent); /* file id (persistent) */
368 301421 : SBVAL(outbody.data, 0x10,
369 : in_file_id_volatile); /* file id (volatile) */
370 301421 : SIVAL(outbody.data, 0x18,
371 : out_input_offset); /* input offset */
372 301421 : SIVAL(outbody.data, 0x1C, 0); /* input count */
373 301421 : SIVAL(outbody.data, 0x20,
374 : out_output_offset); /* output offset */
375 301421 : SIVAL(outbody.data, 0x24,
376 : out_output_buffer.length); /* output count */
377 301421 : SIVAL(outbody.data, 0x28, 0); /* flags */
378 301421 : SIVAL(outbody.data, 0x2C, 0); /* reserved */
379 301421 : if (body_padding != 0) {
380 6 : memset(outbody.data + 0x30, 0, body_padding);
381 : }
382 :
383 : /*
384 : * Note: Windows Vista and 2008 send back also the
385 : * input from the request. But it was fixed in
386 : * Windows 7.
387 : */
388 301421 : outdyn = out_output_buffer;
389 :
390 301421 : error = smbd_smb2_request_done_ex(req, status, outbody, &outdyn,
391 : __location__);
392 301421 : if (!NT_STATUS_IS_OK(error)) {
393 0 : smbd_server_connection_terminate(req->xconn,
394 : nt_errstr(error));
395 0 : return;
396 : }
397 : }
398 :
399 306724 : static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
400 : struct tevent_context *ev,
401 : struct smbd_smb2_request *smb2req,
402 : struct files_struct *fsp,
403 : uint32_t in_ctl_code,
404 : DATA_BLOB in_input,
405 : uint32_t in_max_output,
406 : uint32_t in_flags)
407 : {
408 : struct tevent_req *req;
409 : struct smbd_smb2_ioctl_state *state;
410 : struct smb_request *smbreq;
411 :
412 306724 : req = tevent_req_create(mem_ctx, &state,
413 : struct smbd_smb2_ioctl_state);
414 306724 : if (req == NULL) {
415 0 : return NULL;
416 : }
417 306724 : state->smb2req = smb2req;
418 306724 : state->smbreq = NULL;
419 306724 : state->fsp = fsp;
420 306724 : state->in_input = in_input;
421 306724 : state->in_max_output = in_max_output;
422 306724 : state->out_output = data_blob_null;
423 :
424 306724 : DEBUG(10, ("smbd_smb2_ioctl: ctl_code[0x%08x] %s, %s\n",
425 : (unsigned)in_ctl_code,
426 : fsp ? fsp_str_dbg(fsp) : "<no handle>",
427 : fsp_fnum_dbg(fsp)));
428 :
429 306724 : smbreq = smbd_smb2_fake_smb_request(smb2req);
430 306724 : if (tevent_req_nomem(smbreq, req)) {
431 0 : return tevent_req_post(req, ev);
432 : }
433 306724 : state->smbreq = smbreq;
434 :
435 306724 : switch (in_ctl_code & IOCTL_DEV_TYPE_MASK) {
436 6673 : case FSCTL_DFS:
437 6673 : return smb2_ioctl_dfs(in_ctl_code, ev, req, state);
438 : break;
439 708 : case FSCTL_FILESYSTEM:
440 708 : return smb2_ioctl_filesys(in_ctl_code, ev, req, state);
441 : break;
442 294562 : case FSCTL_NAMED_PIPE:
443 294562 : return smb2_ioctl_named_pipe(in_ctl_code, ev, req, state);
444 : break;
445 4437 : case FSCTL_NETWORK_FILESYSTEM:
446 4437 : return smb2_ioctl_network_fs(in_ctl_code, ev, req, state);
447 : break;
448 344 : case FSCTL_SMBTORTURE:
449 344 : return smb2_ioctl_smbtorture(in_ctl_code, ev, req, state);
450 : break;
451 0 : default:
452 0 : if (IS_IPC(smbreq->conn)) {
453 0 : tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
454 : } else {
455 0 : tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
456 : }
457 :
458 0 : return tevent_req_post(req, ev);
459 : break;
460 : }
461 :
462 : tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
463 : return tevent_req_post(req, ev);
464 : }
465 :
466 306724 : static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
467 : TALLOC_CTX *mem_ctx,
468 : DATA_BLOB *out_output,
469 : uint8_t *body_padding,
470 : bool *disconnect)
471 : {
472 306724 : NTSTATUS status = NT_STATUS_OK;
473 306724 : struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
474 : struct smbd_smb2_ioctl_state);
475 : enum tevent_req_state req_state;
476 : uint64_t err;
477 :
478 306724 : *body_padding = state->body_padding;
479 306724 : *disconnect = state->disconnect;
480 :
481 306724 : if ((tevent_req_is_error(req, &req_state, &err) == false)
482 5369 : || (req_state == TEVENT_REQ_USER_ERROR)) {
483 : /*
484 : * Return output buffer to caller if the ioctl was successfully
485 : * processed, even if a user error occurred. Some ioctls return
486 : * data on failure.
487 : */
488 306724 : *out_output = state->out_output;
489 306724 : talloc_steal(mem_ctx, out_output->data);
490 : }
491 :
492 306724 : tevent_req_is_nterror(req, &status);
493 306724 : tevent_req_received(req);
494 306724 : return status;
495 : }
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