summaryrefslogtreecommitdiff
path: root/source3/smbd/smb2_create.c
blob: 2c790775072e978ebff50327ab0e35e76d95f298 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
/*
   Unix SMB/CIFS implementation.
   Core SMB2 server

   Copyright (C) Stefan Metzmacher 2009

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "smbd/globals.h"
#include "../source4/libcli/smb2/smb2_constants.h"

static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
						struct tevent_context *ev,
						struct smbd_smb2_request *smb2req,
						uint8_t in_oplock_level,
						uint32_t in_impersonation_level,
						uint32_t in_desired_access,
						uint32_t in_file_attributes,
						uint32_t in_share_access,
						uint32_t in_create_disposition,
						uint32_t in_create_options,
						const char *in_name);
static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
				      uint8_t *out_oplock_level,
				      uint32_t *out_create_action,
				      NTTIME *out_creation_time,
				      NTTIME *out_last_access_time,
				      NTTIME *out_last_write_time,
				      NTTIME *out_change_time,
				      uint64_t *out_allocation_size,
				      uint64_t *out_end_of_file,
				      uint32_t *out_file_attributes,
				      uint64_t *out_file_id_volatile);

static void smbd_smb2_request_create_done(struct tevent_req *subreq);
NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *req)
{
	const uint8_t *inbody;
	int i = req->current_idx;
	size_t expected_body_size = 0x39;
	size_t body_size;
	uint8_t in_oplock_level;
	uint32_t in_impersonation_level;
	uint32_t in_desired_access;
	uint32_t in_file_attributes;
	uint32_t in_share_access;
	uint32_t in_create_disposition;
	uint32_t in_create_options;
	uint16_t in_name_offset;
	uint16_t in_name_length;
	DATA_BLOB in_name_buffer;
	char *in_name_string;
	size_t in_name_string_size;
	bool ok;
	struct tevent_req *subreq;

	if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}

	inbody = (const uint8_t *)req->in.vector[i+1].iov_base;

	body_size = SVAL(inbody, 0x00);
	if (body_size != expected_body_size) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}

	in_oplock_level		= CVAL(inbody, 0x03);
	in_impersonation_level	= IVAL(inbody, 0x04);
	in_desired_access	= IVAL(inbody, 0x18);
	in_file_attributes	= IVAL(inbody, 0x1C);
	in_share_access		= IVAL(inbody, 0x20);
	in_create_disposition	= IVAL(inbody, 0x24);
	in_create_options	= IVAL(inbody, 0x28);
	in_name_offset		= SVAL(inbody, 0x2C);
	in_name_length		= SVAL(inbody, 0x2E);

	if (in_name_offset == 0 && in_name_length == 0) {
		/* This is ok */
	} else if (in_name_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}

	if (in_name_length > req->in.vector[i+2].iov_len) {
		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
	}

	in_name_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
	in_name_buffer.length = in_name_length;

	ok = convert_string_talloc(req, CH_UTF16, CH_UNIX,
				   in_name_buffer.data,
				   in_name_buffer.length,
				   &in_name_string,
				   &in_name_string_size, false);
	if (!ok) {
		return smbd_smb2_request_error(req, NT_STATUS_ILLEGAL_CHARACTER);
	}

	subreq = smbd_smb2_create_send(req,
				       req->conn->smb2.event_ctx,
				       req,
				       in_oplock_level,
				       in_impersonation_level,
				       in_desired_access,
				       in_file_attributes,
				       in_share_access,
				       in_create_disposition,
				       in_create_options,
				       in_name_string);
	if (subreq == NULL) {
		return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
	}
	tevent_req_set_callback(subreq, smbd_smb2_request_create_done, req);

	if (tevent_req_is_in_progress(subreq)) {
		return smbd_smb2_request_pending_queue(req);
	}

	return NT_STATUS_OK;
}

static void smbd_smb2_request_create_done(struct tevent_req *subreq)
{
	struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
					struct smbd_smb2_request);
	int i = req->current_idx;
	uint8_t *outhdr;
	DATA_BLOB outbody;
	DATA_BLOB outdyn;
	uint8_t out_oplock_level;
	uint32_t out_create_action;
	NTTIME out_creation_time;
	NTTIME out_last_access_time;
	NTTIME out_last_write_time;
	NTTIME out_change_time;
	uint64_t out_allocation_size;
	uint64_t out_end_of_file;
	uint32_t out_file_attributes;
	uint64_t out_file_id_volatile;
	NTSTATUS status;
	NTSTATUS error; /* transport error */

	status = smbd_smb2_create_recv(subreq,
				       &out_oplock_level,
				       &out_create_action,
				       &out_creation_time,
				       &out_last_access_time,
				       &out_last_write_time,
				       &out_change_time,
				       &out_allocation_size,
				       &out_end_of_file,
				       &out_file_attributes,
				       &out_file_id_volatile);
	TALLOC_FREE(subreq);
	if (!NT_STATUS_IS_OK(status)) {
		error = smbd_smb2_request_error(req, status);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->conn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	outhdr = (uint8_t *)req->out.vector[i].iov_base;

	outbody = data_blob_talloc(req->out.vector, NULL, 0x58);
	if (outbody.data == NULL) {
		error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
		if (!NT_STATUS_IS_OK(error)) {
			smbd_server_connection_terminate(req->conn,
							 nt_errstr(error));
			return;
		}
		return;
	}

	SSVAL(outbody.data, 0x00, 0x58 + 1);	/* struct size */
	SCVAL(outbody.data, 0x02,
	      out_oplock_level);		/* oplock level */
	SCVAL(outbody.data, 0x03, 0);		/* reserved */
	SIVAL(outbody.data, 0x04,
	      out_create_action);		/* create action */
	SBVAL(outbody.data, 0x08,
	      out_creation_time);		/* creation time */
	SBVAL(outbody.data, 0x10,
	      out_last_access_time);		/* last access time */
	SBVAL(outbody.data, 0x18,
	      out_last_write_time);		/* last write time */
	SBVAL(outbody.data, 0x20,
	      out_change_time);			/* change time */
	SBVAL(outbody.data, 0x28,
	      out_allocation_size);		/* allocation size */
	SBVAL(outbody.data, 0x30,
	      out_end_of_file);			/* end of file */
	SIVAL(outbody.data, 0x38,
	      out_file_attributes);		/* file attributes */
	SIVAL(outbody.data, 0x3C, 0);		/* reserved */
	SBVAL(outbody.data, 0x40, 0);		/* file id (persistent) */
	SBVAL(outbody.data, 0x48,
	      out_file_id_volatile);		/* file id (volatile) */
	SIVAL(outbody.data, 0x50, 0);		/* create contexts offset */
	SIVAL(outbody.data, 0x54, 0);		/* create contexts length */

	outdyn = data_blob_const(NULL, 0);

	error = smbd_smb2_request_done(req, outbody, &outdyn);
	if (!NT_STATUS_IS_OK(error)) {
		smbd_server_connection_terminate(req->conn,
						 nt_errstr(error));
		return;
	}
}

struct smbd_smb2_create_state {
	struct smbd_smb2_request *smb2req;
	uint8_t out_oplock_level;
	uint32_t out_create_action;
	NTTIME out_creation_time;
	NTTIME out_last_access_time;
	NTTIME out_last_write_time;
	NTTIME out_change_time;
	uint64_t out_allocation_size;
	uint64_t out_end_of_file;
	uint32_t out_file_attributes;
	uint64_t out_file_id_volatile;
};

static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
						struct tevent_context *ev,
						struct smbd_smb2_request *smb2req,
						uint8_t in_oplock_level,
						uint32_t in_impersonation_level,
						uint32_t in_desired_access,
						uint32_t in_file_attributes,
						uint32_t in_share_access,
						uint32_t in_create_disposition,
						uint32_t in_create_options,
						const char *in_name)
{
	struct tevent_req *req;
	struct smbd_smb2_create_state *state;
	NTSTATUS status;
	struct smb_request *smbreq;
	files_struct *result;
	int info;
	SMB_STRUCT_STAT sbuf;
	struct smb_filename *smb_fname = NULL;

	req = tevent_req_create(mem_ctx, &state,
				struct smbd_smb2_create_state);
	if (req == NULL) {
		return NULL;
	}
	state->smb2req = smb2req;

	DEBUG(10,("smbd_smb2_create: name[%s]\n",
		  in_name));

	smbreq = smbd_smb2_fake_smb_request(smb2req);
	if (tevent_req_nomem(smbreq, req)) {
		goto out;
	}

	if (IS_IPC(smbreq->conn)) {
		const char *pipe_name = in_name;

		if (!lp_nt_pipe_support()) {
			tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
			goto out;
		}

		/* Strip \\ off the name. */
		if (pipe_name[0] == '\\') {
			pipe_name++;
		}

		status = open_np_file(smbreq, pipe_name, &result);
		if (!NT_STATUS_IS_OK(status)) {
			tevent_req_nterror(req, status);
			goto out;
		}
		info = FILE_WAS_OPENED;
		ZERO_STRUCT(sbuf);
	} else if (CAN_PRINT(smbreq->conn)) {
		status = file_new(smbreq, smbreq->conn, &result);
		if(!NT_STATUS_IS_OK(status)) {
			tevent_req_nterror(req, status);
			goto out;
		}

		status = print_fsp_open(smbreq,
					smbreq->conn,
					in_name,
					smbreq->vuid,
					result,
					&sbuf);
		if (!NT_STATUS_IS_OK(status)) {
			file_free(smbreq, result);
			tevent_req_nterror(req, status);
			goto out;
		}
		info = FILE_WAS_CREATED;
	} else {
		char *fname = NULL;

		/* these are ignored for SMB2 */
		in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
		in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */

		status = filename_convert(talloc_tos(),
					smbreq->conn,
					smbreq->flags2 & FLAGS2_DFS_PATHNAMES,
					in_name,
					&smb_fname,
					&fname);
		if (!NT_STATUS_IS_OK(status)) {
			tevent_req_nterror(req, status);
			goto out;
		}

		status = SMB_VFS_CREATE_FILE(smbreq->conn,
					     smbreq,
					     0, /* root_dir_fid */
					     smb_fname,
					     in_desired_access,
					     in_share_access,
					     in_create_disposition,
					     in_create_options,
					     in_file_attributes,
					     0, /* oplock_request */
					     0, /* allocation_size */
					     NULL, /* security_descriptor */
					     NULL, /* ea_list */
					     &result,
					     &info);
		if (!NT_STATUS_IS_OK(status)) {
			tevent_req_nterror(req, status);
			goto out;
		}
		sbuf = smb_fname->st;
	}

	smb2req->compat_chain_fsp = smbreq->chain_fsp;

	state->out_oplock_level	= 0;
	if ((in_create_disposition == FILE_SUPERSEDE)
	    && (info == FILE_WAS_OVERWRITTEN)) {
		state->out_create_action = FILE_WAS_SUPERSEDED;
	} else {
		state->out_create_action = info;
	}
	unix_timespec_to_nt_time(&state->out_creation_time, sbuf.st_ex_btime);
	unix_timespec_to_nt_time(&state->out_last_access_time, sbuf.st_ex_atime);
	unix_timespec_to_nt_time(&state->out_last_write_time,sbuf.st_ex_mtime);
	unix_timespec_to_nt_time(&state->out_change_time, sbuf.st_ex_ctime);
	state->out_allocation_size	= sbuf.st_ex_blksize * sbuf.st_ex_blocks;
	state->out_end_of_file		= sbuf.st_ex_size;
	state->out_file_attributes	= dos_mode(result->conn,
						   result->fsp_name,
						   &sbuf);
	if (state->out_file_attributes == 0) {
		state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
	}
	state->out_file_id_volatile = result->fnum;

	tevent_req_done(req);
 out:
	TALLOC_FREE(smb_fname);
	return tevent_req_post(req, ev);
}

static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
				      uint8_t *out_oplock_level,
				      uint32_t *out_create_action,
				      NTTIME *out_creation_time,
				      NTTIME *out_last_access_time,
				      NTTIME *out_last_write_time,
				      NTTIME *out_change_time,
				      uint64_t *out_allocation_size,
				      uint64_t *out_end_of_file,
				      uint32_t *out_file_attributes,
				      uint64_t *out_file_id_volatile)
{
	NTSTATUS status;
	struct smbd_smb2_create_state *state = tevent_req_data(req,
					       struct smbd_smb2_create_state);

	if (tevent_req_is_nterror(req, &status)) {
		tevent_req_received(req);
		return status;
	}

	*out_oplock_level	= state->out_oplock_level;
	*out_create_action	= state->out_create_action;
	*out_creation_time	= state->out_creation_time;
	*out_last_access_time	= state->out_last_access_time;
	*out_last_write_time	= state->out_last_write_time;
	*out_change_time	= state->out_change_time;
	*out_allocation_size	= state->out_allocation_size;
	*out_end_of_file	= state->out_end_of_file;
	*out_file_attributes	= state->out_file_attributes;
	*out_file_id_volatile	= state->out_file_id_volatile;

	tevent_req_received(req);
	return NT_STATUS_OK;
}