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lib/tdb/tools/tdbtorture.c: fixed memory leak.
[Samba/gebeck_regimport.git] / source4 / librpc / rpc / dcerpc.c
blobc8add30ef849606e1b3488c3d2b34a7d4bfaecfc
1 /*
2 Unix SMB/CIFS implementation.
3 raw dcerpc operations
4
5 Copyright (C) Tim Potter 2003
6 Copyright (C) Andrew Tridgell 2003-2005
7 Copyright (C) Jelmer Vernooij 2004-2005
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23 #include "includes.h"
24 #include "../lib/util/dlinklist.h"
25 #include "lib/events/events.h"
26 #include "librpc/rpc/dcerpc.h"
27 #include "librpc/rpc/dcerpc_proto.h"
28 #include "librpc/gen_ndr/ndr_misc.h"
29 #include "librpc/gen_ndr/ndr_dcerpc.h"
30 #include "libcli/composite/composite.h"
31 #include "auth/gensec/gensec.h"
32 #include "param/param.h"
33
34 _PUBLIC_ NTSTATUS dcerpc_init(struct loadparm_context *lp_ctx)
35 {
36 return gensec_init(lp_ctx);
37 }
38
39 static void dcerpc_connection_dead(struct dcerpc_connection *conn, NTSTATUS status);
40 static void dcerpc_ship_next_request(struct dcerpc_connection *c);
41
42 /* destroy a dcerpc connection */
43 static int dcerpc_connection_destructor(struct dcerpc_connection *conn)
44 {
45 if (conn->dead) {
46 conn->free_skipped = true;
47 return -1;
48 }
49 dcerpc_connection_dead(conn, NT_STATUS_LOCAL_DISCONNECT);
50 return 0;
51 }
52
53
54 /* initialise a dcerpc connection.
55 the event context is optional
56 */
57 static struct dcerpc_connection *dcerpc_connection_init(TALLOC_CTX *mem_ctx,
58 struct tevent_context *ev,
59 struct smb_iconv_convenience *ic)
60 {
61 struct dcerpc_connection *c;
62
63 c = talloc_zero(mem_ctx, struct dcerpc_connection);
64 if (!c) {
65 return NULL;
66 }
67
68 c->iconv_convenience = talloc_reference(c, ic);
69
70 c->event_ctx = talloc_reference(c, ev);
71
72 if (c->event_ctx == NULL) {
73 talloc_free(c);
74 return NULL;
75 }
76
77 c->call_id = 1;
78 c->security_state.auth_info = NULL;
79 c->security_state.session_key = dcerpc_generic_session_key;
80 c->security_state.generic_state = NULL;
81 c->binding_string = NULL;
82 c->flags = 0;
83 c->srv_max_xmit_frag = 0;
84 c->srv_max_recv_frag = 0;
85 c->pending = NULL;
86
87 talloc_set_destructor(c, dcerpc_connection_destructor);
88
89 return c;
90 }
91
92 /* initialise a dcerpc pipe. */
93 _PUBLIC_ struct dcerpc_pipe *dcerpc_pipe_init(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
94 struct smb_iconv_convenience *ic)
95 {
96 struct dcerpc_pipe *p;
97
98 p = talloc(mem_ctx, struct dcerpc_pipe);
99 if (!p) {
100 return NULL;
101 }
102
103 p->conn = dcerpc_connection_init(p, ev, ic);
104 if (p->conn == NULL) {
105 talloc_free(p);
106 return NULL;
107 }
108
109 p->last_fault_code = 0;
110 p->context_id = 0;
111 p->request_timeout = DCERPC_REQUEST_TIMEOUT;
112 p->binding = NULL;
113
114 ZERO_STRUCT(p->syntax);
115 ZERO_STRUCT(p->transfer_syntax);
116
117 return p;
118 }
119
120
121 /*
122 choose the next call id to use
123 */
124 static uint32_t next_call_id(struct dcerpc_connection *c)
125 {
126 c->call_id++;
127 if (c->call_id == 0) {
128 c->call_id++;
129 }
130 return c->call_id;
131 }
132
133 /* we need to be able to get/set the fragment length without doing a full
134 decode */
135 void dcerpc_set_frag_length(DATA_BLOB *blob, uint16_t v)
136 {
137 if (CVAL(blob->data,DCERPC_DREP_OFFSET) & DCERPC_DREP_LE) {
138 SSVAL(blob->data, DCERPC_FRAG_LEN_OFFSET, v);
139 } else {
140 RSSVAL(blob->data, DCERPC_FRAG_LEN_OFFSET, v);
141 }
142 }
143
144 uint16_t dcerpc_get_frag_length(const DATA_BLOB *blob)
145 {
146 if (CVAL(blob->data,DCERPC_DREP_OFFSET) & DCERPC_DREP_LE) {
147 return SVAL(blob->data, DCERPC_FRAG_LEN_OFFSET);
148 } else {
149 return RSVAL(blob->data, DCERPC_FRAG_LEN_OFFSET);
150 }
151 }
152
153 void dcerpc_set_auth_length(DATA_BLOB *blob, uint16_t v)
154 {
155 if (CVAL(blob->data,DCERPC_DREP_OFFSET) & DCERPC_DREP_LE) {
156 SSVAL(blob->data, DCERPC_AUTH_LEN_OFFSET, v);
157 } else {
158 RSSVAL(blob->data, DCERPC_AUTH_LEN_OFFSET, v);
159 }
160 }
161
162
163 /**
164 setup for a ndr pull, also setting up any flags from the binding string
165 */
166 static struct ndr_pull *ndr_pull_init_flags(struct dcerpc_connection *c,
167 DATA_BLOB *blob, TALLOC_CTX *mem_ctx)
168 {
169 struct ndr_pull *ndr = ndr_pull_init_blob(blob, mem_ctx, c->iconv_convenience);
170
171 if (ndr == NULL) return ndr;
172
173 if (c->flags & DCERPC_DEBUG_PAD_CHECK) {
174 ndr->flags |= LIBNDR_FLAG_PAD_CHECK;
175 }
176
177 if (c->flags & DCERPC_NDR_REF_ALLOC) {
178 ndr->flags |= LIBNDR_FLAG_REF_ALLOC;
179 }
180
181 return ndr;
182 }
183
184 /*
185 parse a data blob into a ncacn_packet structure. This handles both
186 input and output packets
187 */
188 static NTSTATUS ncacn_pull(struct dcerpc_connection *c, DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
189 struct ncacn_packet *pkt)
190 {
191 struct ndr_pull *ndr;
192 enum ndr_err_code ndr_err;
193
194 ndr = ndr_pull_init_flags(c, blob, mem_ctx);
195 if (!ndr) {
196 return NT_STATUS_NO_MEMORY;
197 }
198
199 if (! (CVAL(blob->data, DCERPC_DREP_OFFSET) & DCERPC_DREP_LE)) {
200 ndr->flags |= LIBNDR_FLAG_BIGENDIAN;
201 }
202
203 ndr_err = ndr_pull_ncacn_packet(ndr, NDR_SCALARS|NDR_BUFFERS, pkt);
204 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
205 return ndr_map_error2ntstatus(ndr_err);
206 }
207
208 return NT_STATUS_OK;
209 }
210
211 /*
212 parse the authentication information on a dcerpc response packet
213 */
214 static NTSTATUS ncacn_pull_request_auth(struct dcerpc_connection *c, TALLOC_CTX *mem_ctx,
215 DATA_BLOB *raw_packet,
216 struct ncacn_packet *pkt)
217 {
218 struct ndr_pull *ndr;
219 NTSTATUS status;
220 struct dcerpc_auth auth;
221 DATA_BLOB auth_blob;
222 enum ndr_err_code ndr_err;
223
224 if (!c->security_state.auth_info ||
225 !c->security_state.generic_state) {
226 return NT_STATUS_OK;
227 }
228
229 switch (c->security_state.auth_info->auth_level) {
230 case DCERPC_AUTH_LEVEL_PRIVACY:
231 case DCERPC_AUTH_LEVEL_INTEGRITY:
232 break;
233
234 case DCERPC_AUTH_LEVEL_CONNECT:
235 if (pkt->auth_length != 0) {
236 break;
237 }
238 return NT_STATUS_OK;
239 case DCERPC_AUTH_LEVEL_NONE:
240 if (pkt->auth_length != 0) {
241 return NT_STATUS_INVALID_NETWORK_RESPONSE;
242 }
243 return NT_STATUS_OK;
244
245 default:
246 return NT_STATUS_INVALID_LEVEL;
247 }
248
249 auth_blob.length = 8 + pkt->auth_length;
250
251 /* check for a valid length */
252 if (pkt->u.response.stub_and_verifier.length < auth_blob.length) {
253 return NT_STATUS_INFO_LENGTH_MISMATCH;
254 }
255
256 auth_blob.data =
257 pkt->u.response.stub_and_verifier.data +
258 pkt->u.response.stub_and_verifier.length - auth_blob.length;
259 pkt->u.response.stub_and_verifier.length -= auth_blob.length;
260
261 /* pull the auth structure */
262 ndr = ndr_pull_init_flags(c, &auth_blob, mem_ctx);
263 if (!ndr) {
264 return NT_STATUS_NO_MEMORY;
265 }
266
267 if (!(pkt->drep[0] & DCERPC_DREP_LE)) {
268 ndr->flags |= LIBNDR_FLAG_BIGENDIAN;
269 }
270
271 ndr_err = ndr_pull_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS, &auth);
272 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
273 return ndr_map_error2ntstatus(ndr_err);
274 }
275 status = NT_STATUS_OK;
276
277 /* check signature or unseal the packet */
278 switch (c->security_state.auth_info->auth_level) {
279 case DCERPC_AUTH_LEVEL_PRIVACY:
280 status = gensec_unseal_packet(c->security_state.generic_state,
281 mem_ctx,
282 raw_packet->data + DCERPC_REQUEST_LENGTH,
283 pkt->u.response.stub_and_verifier.length,
284 raw_packet->data,
285 raw_packet->length - auth.credentials.length,
286 &auth.credentials);
287 memcpy(pkt->u.response.stub_and_verifier.data,
288 raw_packet->data + DCERPC_REQUEST_LENGTH,
289 pkt->u.response.stub_and_verifier.length);
290 break;
291
292 case DCERPC_AUTH_LEVEL_INTEGRITY:
293 status = gensec_check_packet(c->security_state.generic_state,
294 mem_ctx,
295 pkt->u.response.stub_and_verifier.data,
296 pkt->u.response.stub_and_verifier.length,
297 raw_packet->data,
298 raw_packet->length - auth.credentials.length,
299 &auth.credentials);
300 break;
301
302 case DCERPC_AUTH_LEVEL_CONNECT:
303 /* for now we ignore possible signatures here */
304 status = NT_STATUS_OK;
305 break;
306
307 default:
308 status = NT_STATUS_INVALID_LEVEL;
309 break;
310 }
311
312 /* remove the indicated amount of paddiing */
313 if (pkt->u.response.stub_and_verifier.length < auth.auth_pad_length) {
314 return NT_STATUS_INFO_LENGTH_MISMATCH;
315 }
316 pkt->u.response.stub_and_verifier.length -= auth.auth_pad_length;
317
318 return status;
319 }
320
321
322 /*
323 push a dcerpc request packet into a blob, possibly signing it.
324 */
325 static NTSTATUS ncacn_push_request_sign(struct dcerpc_connection *c,
326 DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
327 size_t sig_size,
328 struct ncacn_packet *pkt)
329 {
330 NTSTATUS status;
331 struct ndr_push *ndr;
332 DATA_BLOB creds2;
333 size_t payload_length;
334 enum ndr_err_code ndr_err;
335 size_t hdr_size = DCERPC_REQUEST_LENGTH;
336
337 /* non-signed packets are simpler */
338 if (sig_size == 0) {
339 return ncacn_push_auth(blob, mem_ctx, c->iconv_convenience, pkt, NULL);
340 }
341
342 switch (c->security_state.auth_info->auth_level) {
343 case DCERPC_AUTH_LEVEL_PRIVACY:
344 case DCERPC_AUTH_LEVEL_INTEGRITY:
345 break;
346
347 case DCERPC_AUTH_LEVEL_CONNECT:
348 /* TODO: let the gensec mech decide if it wants to generate a signature */
349 return ncacn_push_auth(blob, mem_ctx, c->iconv_convenience, pkt, NULL);
350
351 case DCERPC_AUTH_LEVEL_NONE:
352 return ncacn_push_auth(blob, mem_ctx, c->iconv_convenience, pkt, NULL);
353
354 default:
355 return NT_STATUS_INVALID_LEVEL;
356 }
357
358 ndr = ndr_push_init_ctx(mem_ctx, c->iconv_convenience);
359 if (!ndr) {
360 return NT_STATUS_NO_MEMORY;
361 }
362
363 if (c->flags & DCERPC_PUSH_BIGENDIAN) {
364 ndr->flags |= LIBNDR_FLAG_BIGENDIAN;
365 }
366
367 if (pkt->pfc_flags & DCERPC_PFC_FLAG_OBJECT_UUID) {
368 ndr->flags |= LIBNDR_FLAG_OBJECT_PRESENT;
369 hdr_size += 16;
370 }
371
372 ndr_err = ndr_push_ncacn_packet(ndr, NDR_SCALARS|NDR_BUFFERS, pkt);
373 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
374 return ndr_map_error2ntstatus(ndr_err);
375 }
376 status = NT_STATUS_OK;
377
378 /* pad to 16 byte multiple in the payload portion of the
379 packet. This matches what w2k3 does */
380 c->security_state.auth_info->auth_pad_length =
381 (16 - (pkt->u.request.stub_and_verifier.length & 15)) & 15;
382 ndr_err = ndr_push_zero(ndr, c->security_state.auth_info->auth_pad_length);
383 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
384 return ndr_map_error2ntstatus(ndr_err);
385 }
386 status = NT_STATUS_OK;
387
388 payload_length = pkt->u.request.stub_and_verifier.length +
389 c->security_state.auth_info->auth_pad_length;
390
391 /* we start without signature, it will appended later */
392 c->security_state.auth_info->credentials = data_blob(NULL,0);
393
394 /* add the auth verifier */
395 ndr_err = ndr_push_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS, c->security_state.auth_info);
396 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
397 return ndr_map_error2ntstatus(ndr_err);
398 }
399 status = NT_STATUS_OK;
400
401 /* extract the whole packet as a blob */
402 *blob = ndr_push_blob(ndr);
403
404 /*
405 * Setup the frag and auth length in the packet buffer.
406 * This is needed if the GENSEC mech does AEAD signing
407 * of the packet headers. The signature itself will be
408 * appended later.
409 */
410 dcerpc_set_frag_length(blob, blob->length + sig_size);
411 dcerpc_set_auth_length(blob, sig_size);
412
413 /* sign or seal the packet */
414 switch (c->security_state.auth_info->auth_level) {
415 case DCERPC_AUTH_LEVEL_PRIVACY:
416 status = gensec_seal_packet(c->security_state.generic_state,
417 mem_ctx,
418 blob->data + hdr_size,
419 payload_length,
420 blob->data,
421 blob->length,
422 &creds2);
423 if (!NT_STATUS_IS_OK(status)) {
424 return status;
425 }
426 break;
427
428 case DCERPC_AUTH_LEVEL_INTEGRITY:
429 status = gensec_sign_packet(c->security_state.generic_state,
430 mem_ctx,
431 blob->data + hdr_size,
432 payload_length,
433 blob->data,
434 blob->length,
435 &creds2);
436 if (!NT_STATUS_IS_OK(status)) {
437 return status;
438 }
439 break;
440
441 default:
442 status = NT_STATUS_INVALID_LEVEL;
443 break;
444 }
445
446 if (creds2.length != sig_size) {
447 DEBUG(0,("dcesrv_auth_response: creds2.length[%u] != sig_size[%u] pad[%u] stub[%u]\n",
448 creds2.length, (uint32_t)sig_size,
449 c->security_state.auth_info->auth_pad_length,
450 pkt->u.request.stub_and_verifier.length));
451 return NT_STATUS_INTERNAL_ERROR;
452 }
453
454 if (!data_blob_append(mem_ctx, blob, creds2.data, creds2.length)) {
455 return NT_STATUS_NO_MEMORY;
456 }
457
458 return NT_STATUS_OK;
459 }
460
461
462 /*
463 fill in the fixed values in a dcerpc header
464 */
465 static void init_ncacn_hdr(struct dcerpc_connection *c, struct ncacn_packet *pkt)
466 {
467 pkt->rpc_vers = 5;
468 pkt->rpc_vers_minor = 0;
469 if (c->flags & DCERPC_PUSH_BIGENDIAN) {
470 pkt->drep[0] = 0;
471 } else {
472 pkt->drep[0] = DCERPC_DREP_LE;
473 }
474 pkt->drep[1] = 0;
475 pkt->drep[2] = 0;
476 pkt->drep[3] = 0;
477 }
478
479 /*
480 map a bind nak reason to a NTSTATUS
481 */
482 static NTSTATUS dcerpc_map_reason(uint16_t reason)
483 {
484 switch (reason) {
485 case DCERPC_BIND_REASON_ASYNTAX:
486 return NT_STATUS_RPC_UNSUPPORTED_NAME_SYNTAX;
487 case DCERPC_BIND_REASON_INVALID_AUTH_TYPE:
488 return NT_STATUS_INVALID_PARAMETER;
489 }
490 return NT_STATUS_UNSUCCESSFUL;
491 }
492
493 /*
494 a bind or alter context has failed
495 */
496 static void dcerpc_composite_fail(struct rpc_request *req)
497 {
498 struct composite_context *c = talloc_get_type(req->async.private_data,
499 struct composite_context);
500 composite_error(c, req->status);
501 }
502
503 /*
504 remove requests from the pending or queued queues
505 */
506 static int dcerpc_req_dequeue(struct rpc_request *req)
507 {
508 switch (req->state) {
509 case RPC_REQUEST_QUEUED:
510 DLIST_REMOVE(req->p->conn->request_queue, req);
511 break;
512 case RPC_REQUEST_PENDING:
513 DLIST_REMOVE(req->p->conn->pending, req);
514 break;
515 case RPC_REQUEST_DONE:
516 break;
517 }
518 return 0;
519 }
520
521
522 /*
523 mark the dcerpc connection dead. All outstanding requests get an error
524 */
525 static void dcerpc_connection_dead(struct dcerpc_connection *conn, NTSTATUS status)
526 {
527 if (conn->dead) return;
528
529 conn->dead = true;
530
531 if (conn->transport.shutdown_pipe) {
532 conn->transport.shutdown_pipe(conn, status);
533 }
534
535 /* all pending requests get the error */
536 while (conn->pending) {
537 struct rpc_request *req = conn->pending;
538 dcerpc_req_dequeue(req);
539 req->state = RPC_REQUEST_DONE;
540 req->status = status;
541 if (req->async.callback) {
542 req->async.callback(req);
543 }
544 }
545
546 talloc_set_destructor(conn, NULL);
547 if (conn->free_skipped) {
548 talloc_free(conn);
549 }
550 }
551
552 /*
553 forward declarations of the recv_data handlers for the types of
554 packets we need to handle
555 */
556 static void dcerpc_request_recv_data(struct dcerpc_connection *c,
557 DATA_BLOB *raw_packet, struct ncacn_packet *pkt);
558
559 /*
560 receive a dcerpc reply from the transport. Here we work out what
561 type of reply it is (normal request, bind or alter context) and
562 dispatch to the appropriate handler
563 */
564 static void dcerpc_recv_data(struct dcerpc_connection *conn, DATA_BLOB *blob, NTSTATUS status)
565 {
566 struct ncacn_packet pkt;
567
568 if (NT_STATUS_IS_OK(status) && blob->length == 0) {
569 status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
570 }
571
572 /* the transport may be telling us of a severe error, such as
573 a dropped socket */
574 if (!NT_STATUS_IS_OK(status)) {
575 data_blob_free(blob);
576 dcerpc_connection_dead(conn, status);
577 return;
578 }
579
580 /* parse the basic packet to work out what type of response this is */
581 status = ncacn_pull(conn, blob, blob->data, &pkt);
582 if (!NT_STATUS_IS_OK(status)) {
583 data_blob_free(blob);
584 dcerpc_connection_dead(conn, status);
585 }
586
587 dcerpc_request_recv_data(conn, blob, &pkt);
588 }
589
590
591 /*
592 Receive a bind reply from the transport
593 */
594 static void dcerpc_bind_recv_handler(struct rpc_request *req,
595 DATA_BLOB *raw_packet, struct ncacn_packet *pkt)
596 {
597 struct composite_context *c;
598 struct dcerpc_connection *conn;
599
600 c = talloc_get_type(req->async.private_data, struct composite_context);
601
602 if (pkt->ptype == DCERPC_PKT_BIND_NAK) {
603 DEBUG(2,("dcerpc: bind_nak reason %d\n",
604 pkt->u.bind_nak.reject_reason));
605 composite_error(c, dcerpc_map_reason(pkt->u.bind_nak.
606 reject_reason));
607 return;
608 }
609
610 if ((pkt->ptype != DCERPC_PKT_BIND_ACK) ||
611 (pkt->u.bind_ack.num_results == 0) ||
612 (pkt->u.bind_ack.ctx_list[0].result != 0)) {
613 composite_error(c, NT_STATUS_NET_WRITE_FAULT);
614 return;
615 }
616
617 conn = req->p->conn;
618
619 conn->srv_max_xmit_frag = pkt->u.bind_ack.max_xmit_frag;
620 conn->srv_max_recv_frag = pkt->u.bind_ack.max_recv_frag;
621
622 if ((req->p->binding->flags & DCERPC_CONCURRENT_MULTIPLEX) &&
623 (pkt->pfc_flags & DCERPC_PFC_FLAG_CONC_MPX)) {
624 conn->flags |= DCERPC_CONCURRENT_MULTIPLEX;
625 }
626
627 if ((req->p->binding->flags & DCERPC_HEADER_SIGNING) &&
628 (pkt->pfc_flags & DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN)) {
629 conn->flags |= DCERPC_HEADER_SIGNING;
630 }
631
632 /* the bind_ack might contain a reply set of credentials */
633 if (conn->security_state.auth_info &&
634 pkt->u.bind_ack.auth_info.length) {
635 enum ndr_err_code ndr_err;
636 ndr_err = ndr_pull_struct_blob(
637 &pkt->u.bind_ack.auth_info, conn,
638 NULL,
639 conn->security_state.auth_info,
640 (ndr_pull_flags_fn_t)ndr_pull_dcerpc_auth);
641 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
642 c->status = ndr_map_error2ntstatus(ndr_err);
643 if (!composite_is_ok(c)) return;
644 }
645 }
646
647 req->p->assoc_group_id = pkt->u.bind_ack.assoc_group_id;
648
649 composite_done(c);
650 }
651
652 /*
653 handle timeouts of individual dcerpc requests
654 */
655 static void dcerpc_timeout_handler(struct tevent_context *ev, struct tevent_timer *te,
656 struct timeval t, void *private_data)
657 {
658 struct rpc_request *req = talloc_get_type(private_data, struct rpc_request);
659
660 if (req->ignore_timeout) {
661 dcerpc_req_dequeue(req);
662 req->state = RPC_REQUEST_DONE;
663 req->status = NT_STATUS_IO_TIMEOUT;
664 if (req->async.callback) {
665 req->async.callback(req);
666 }
667 return;
668 }
669
670 dcerpc_connection_dead(req->p->conn, NT_STATUS_IO_TIMEOUT);
671 }
672
673 /*
674 send a async dcerpc bind request
675 */
676 struct composite_context *dcerpc_bind_send(struct dcerpc_pipe *p,
677 TALLOC_CTX *mem_ctx,
678 const struct ndr_syntax_id *syntax,
679 const struct ndr_syntax_id *transfer_syntax)
680 {
681 struct composite_context *c;
682 struct ncacn_packet pkt;
683 DATA_BLOB blob;
684 struct rpc_request *req;
685
686 c = composite_create(mem_ctx,p->conn->event_ctx);
687 if (c == NULL) return NULL;
688
689 c->private_data = p;
690
691 p->syntax = *syntax;
692 p->transfer_syntax = *transfer_syntax;
693
694 init_ncacn_hdr(p->conn, &pkt);
695
696 pkt.ptype = DCERPC_PKT_BIND;
697 pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
698 pkt.call_id = p->conn->call_id;
699 pkt.auth_length = 0;
700
701 if (p->binding->flags & DCERPC_CONCURRENT_MULTIPLEX) {
702 pkt.pfc_flags |= DCERPC_PFC_FLAG_CONC_MPX;
703 }
704
705 if (p->binding->flags & DCERPC_HEADER_SIGNING) {
706 pkt.pfc_flags |= DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN;
707 }
708
709 pkt.u.bind.max_xmit_frag = 5840;
710 pkt.u.bind.max_recv_frag = 5840;
711 pkt.u.bind.assoc_group_id = p->binding->assoc_group_id;
712 pkt.u.bind.num_contexts = 1;
713 pkt.u.bind.ctx_list = talloc_array(mem_ctx, struct dcerpc_ctx_list, 1);
714 if (composite_nomem(pkt.u.bind.ctx_list, c)) return c;
715 pkt.u.bind.ctx_list[0].context_id = p->context_id;
716 pkt.u.bind.ctx_list[0].num_transfer_syntaxes = 1;
717 pkt.u.bind.ctx_list[0].abstract_syntax = p->syntax;
718 pkt.u.bind.ctx_list[0].transfer_syntaxes = &p->transfer_syntax;
719 pkt.u.bind.auth_info = data_blob(NULL, 0);
720
721 /* construct the NDR form of the packet */
722 c->status = ncacn_push_auth(&blob, c, p->conn->iconv_convenience, &pkt,
723 p->conn->security_state.auth_info);
724 if (!composite_is_ok(c)) return c;
725
726 p->conn->transport.recv_data = dcerpc_recv_data;
727
728 /*
729 * we allocate a dcerpc_request so we can be in the same
730 * request queue as normal requests
731 */
732 req = talloc_zero(c, struct rpc_request);
733 if (composite_nomem(req, c)) return c;
734
735 req->state = RPC_REQUEST_PENDING;
736 req->call_id = pkt.call_id;
737 req->async.private_data = c;
738 req->async.callback = dcerpc_composite_fail;
739 req->p = p;
740 req->recv_handler = dcerpc_bind_recv_handler;
741 DLIST_ADD_END(p->conn->pending, req, struct rpc_request *);
742 talloc_set_destructor(req, dcerpc_req_dequeue);
743
744 c->status = p->conn->transport.send_request(p->conn, &blob,
745 true);
746 if (!composite_is_ok(c)) return c;
747
748 event_add_timed(c->event_ctx, req,
749 timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
750 dcerpc_timeout_handler, req);
751
752 return c;
753 }
754
755 /*
756 recv side of async dcerpc bind request
757 */
758 NTSTATUS dcerpc_bind_recv(struct composite_context *ctx)
759 {
760 NTSTATUS result = composite_wait(ctx);
761 talloc_free(ctx);
762 return result;
763 }
764
765 /*
766 perform a continued bind (and auth3)
767 */
768 NTSTATUS dcerpc_auth3(struct dcerpc_pipe *p,
769 TALLOC_CTX *mem_ctx)
770 {
771 struct ncacn_packet pkt;
772 NTSTATUS status;
773 DATA_BLOB blob;
774
775 init_ncacn_hdr(p->conn, &pkt);
776
777 pkt.ptype = DCERPC_PKT_AUTH3;
778 pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
779 pkt.call_id = next_call_id(p->conn);
780 pkt.auth_length = 0;
781 pkt.u.auth3._pad = 0;
782 pkt.u.auth3.auth_info = data_blob(NULL, 0);
783
784 if (p->binding->flags & DCERPC_CONCURRENT_MULTIPLEX) {
785 pkt.pfc_flags |= DCERPC_PFC_FLAG_CONC_MPX;
786 }
787
788 if (p->binding->flags & DCERPC_HEADER_SIGNING) {
789 pkt.pfc_flags |= DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN;
790 }
791
792 /* construct the NDR form of the packet */
793 status = ncacn_push_auth(&blob, mem_ctx,
794 p->conn->iconv_convenience,
795 &pkt,
796 p->conn->security_state.auth_info);
797 if (!NT_STATUS_IS_OK(status)) {
798 return status;
799 }
800
801 /* send it on its way */
802 status = p->conn->transport.send_request(p->conn, &blob, false);
803 if (!NT_STATUS_IS_OK(status)) {
804 return status;
805 }
806
807 return NT_STATUS_OK;
808 }
809
810
811 /*
812 process a fragment received from the transport layer during a
813 request
814
815 This function frees the data
816 */
817 static void dcerpc_request_recv_data(struct dcerpc_connection *c,
818 DATA_BLOB *raw_packet, struct ncacn_packet *pkt)
819 {
820 struct rpc_request *req;
821 uint_t length;
822 NTSTATUS status = NT_STATUS_OK;
823
824 /*
825 if this is an authenticated connection then parse and check
826 the auth info. We have to do this before finding the
827 matching packet, as the request structure might have been
828 removed due to a timeout, but if it has been we still need
829 to run the auth routines so that we don't get the sign/seal
830 info out of step with the server
831 */
832 if (c->security_state.auth_info && c->security_state.generic_state &&
833 pkt->ptype == DCERPC_PKT_RESPONSE) {
834 status = ncacn_pull_request_auth(c, raw_packet->data, raw_packet, pkt);
835 }
836
837 /* find the matching request */
838 for (req=c->pending;req;req=req->next) {
839 if (pkt->call_id == req->call_id) break;
840 }
841
842 #if 0
843 /* useful for testing certain vendors RPC servers */
844 if (req == NULL && c->pending && pkt->call_id == 0) {
845 DEBUG(0,("HACK FOR INCORRECT CALL ID\n"));
846 req = c->pending;
847 }
848 #endif
849
850 if (req == NULL) {
851 DEBUG(2,("dcerpc_request: unmatched call_id %u in response packet\n", pkt->call_id));
852 data_blob_free(raw_packet);
853 return;
854 }
855
856 talloc_steal(req, raw_packet->data);
857
858 if (req->recv_handler != NULL) {
859 dcerpc_req_dequeue(req);
860 req->state = RPC_REQUEST_DONE;
861 req->recv_handler(req, raw_packet, pkt);
862 return;
863 }
864
865 if (pkt->ptype == DCERPC_PKT_FAULT) {
866 DEBUG(5,("rpc fault: %s\n", dcerpc_errstr(c, pkt->u.fault.status)));
867 req->fault_code = pkt->u.fault.status;
868 req->status = NT_STATUS_NET_WRITE_FAULT;
869 goto req_done;
870 }
871
872 if (pkt->ptype != DCERPC_PKT_RESPONSE) {
873 DEBUG(2,("Unexpected packet type %d in dcerpc response\n",
874 (int)pkt->ptype));
875 req->fault_code = DCERPC_FAULT_OTHER;
876 req->status = NT_STATUS_NET_WRITE_FAULT;
877 goto req_done;
878 }
879
880 /* now check the status from the auth routines, and if it failed then fail
881 this request accordingly */
882 if (!NT_STATUS_IS_OK(status)) {
883 req->status = status;
884 goto req_done;
885 }
886
887 length = pkt->u.response.stub_and_verifier.length;
888
889 if (length > 0) {
890 req->payload.data = talloc_realloc(req,
891 req->payload.data,
892 uint8_t,
893 req->payload.length + length);
894 if (!req->payload.data) {
895 req->status = NT_STATUS_NO_MEMORY;
896 goto req_done;
897 }
898 memcpy(req->payload.data+req->payload.length,
899 pkt->u.response.stub_and_verifier.data, length);
900 req->payload.length += length;
901 }
902
903 if (!(pkt->pfc_flags & DCERPC_PFC_FLAG_LAST)) {
904 c->transport.send_read(c);
905 return;
906 }
907
908 if (!(pkt->drep[0] & DCERPC_DREP_LE)) {
909 req->flags |= DCERPC_PULL_BIGENDIAN;
910 } else {
911 req->flags &= ~DCERPC_PULL_BIGENDIAN;
912 }
913
914
915 req_done:
916 /* we've got the full payload */
917 req->state = RPC_REQUEST_DONE;
918 DLIST_REMOVE(c->pending, req);
919
920 if (c->request_queue != NULL) {
921 /* We have to look at shipping further requests before calling
922 * the async function, that one might close the pipe */
923 dcerpc_ship_next_request(c);
924 }
925
926 if (req->async.callback) {
927 req->async.callback(req);
928 }
929 }
930
931 /*
932 perform the send side of a async dcerpc request
933 */
934 static struct rpc_request *dcerpc_request_send(struct dcerpc_pipe *p,
935 const struct GUID *object,
936 uint16_t opnum,
937 bool async,
938 DATA_BLOB *stub_data)
939 {
940 struct rpc_request *req;
941
942 p->conn->transport.recv_data = dcerpc_recv_data;
943
944 req = talloc(p, struct rpc_request);
945 if (req == NULL) {
946 return NULL;
947 }
948
949 req->p = p;
950 req->call_id = next_call_id(p->conn);
951 req->status = NT_STATUS_OK;
952 req->state = RPC_REQUEST_QUEUED;
953 req->payload = data_blob(NULL, 0);
954 req->flags = 0;
955 req->fault_code = 0;
956 req->async_call = async;
957 req->ignore_timeout = false;
958 req->async.callback = NULL;
959 req->async.private_data = NULL;
960 req->recv_handler = NULL;
961
962 if (object != NULL) {
963 req->object = (struct GUID *)talloc_memdup(req, (const void *)object, sizeof(*object));
964 if (req->object == NULL) {
965 talloc_free(req);
966 return NULL;
967 }
968 } else {
969 req->object = NULL;
970 }
971
972 req->opnum = opnum;
973 req->request_data.length = stub_data->length;
974 req->request_data.data = talloc_reference(req, stub_data->data);
975 if (req->request_data.length && req->request_data.data == NULL) {
976 return NULL;
977 }
978
979 DLIST_ADD_END(p->conn->request_queue, req, struct rpc_request *);
980 talloc_set_destructor(req, dcerpc_req_dequeue);
981
982 dcerpc_ship_next_request(p->conn);
983
984 if (p->request_timeout) {
985 event_add_timed(dcerpc_event_context(p), req,
986 timeval_current_ofs(p->request_timeout, 0),
987 dcerpc_timeout_handler, req);
988 }
989
990 return req;
991 }
992
993 /*
994 Send a request using the transport
995 */
996
997 static void dcerpc_ship_next_request(struct dcerpc_connection *c)
998 {
999 struct rpc_request *req;
1000 struct dcerpc_pipe *p;
1001 DATA_BLOB *stub_data;
1002 struct ncacn_packet pkt;
1003 DATA_BLOB blob;
1004 uint32_t remaining, chunk_size;
1005 bool first_packet = true;
1006 size_t sig_size = 0;
1007
1008 req = c->request_queue;
1009 if (req == NULL) {
1010 return;
1011 }
1012
1013 p = req->p;
1014 stub_data = &req->request_data;
1015
1016 if (!req->async_call && (c->pending != NULL)) {
1017 return;
1018 }
1019
1020 DLIST_REMOVE(c->request_queue, req);
1021 DLIST_ADD(c->pending, req);
1022 req->state = RPC_REQUEST_PENDING;
1023
1024 init_ncacn_hdr(p->conn, &pkt);
1025
1026 remaining = stub_data->length;
1027
1028 /* we can write a full max_recv_frag size, minus the dcerpc
1029 request header size */
1030 chunk_size = p->conn->srv_max_recv_frag;
1031 chunk_size -= DCERPC_REQUEST_LENGTH;
1032 if (c->security_state.auth_info &&
1033 c->security_state.generic_state) {
1034 sig_size = gensec_sig_size(c->security_state.generic_state,
1035 p->conn->srv_max_recv_frag);
1036 if (sig_size) {
1037 chunk_size -= DCERPC_AUTH_TRAILER_LENGTH;
1038 chunk_size -= sig_size;
1039 }
1040 }
1041 chunk_size -= (chunk_size % 16);
1042
1043 pkt.ptype = DCERPC_PKT_REQUEST;
1044 pkt.call_id = req->call_id;
1045 pkt.auth_length = 0;
1046 pkt.pfc_flags = 0;
1047 pkt.u.request.alloc_hint = remaining;
1048 pkt.u.request.context_id = p->context_id;
1049 pkt.u.request.opnum = req->opnum;
1050
1051 if (req->object) {
1052 pkt.u.request.object.object = *req->object;
1053 pkt.pfc_flags |= DCERPC_PFC_FLAG_OBJECT_UUID;
1054 chunk_size -= ndr_size_GUID(req->object,NULL,0);
1055 }
1056
1057 /* we send a series of pdus without waiting for a reply */
1058 while (remaining > 0 || first_packet) {
1059 uint32_t chunk = MIN(chunk_size, remaining);
1060 bool last_frag = false;
1061 bool do_trans = false;
1062
1063 first_packet = false;
1064 pkt.pfc_flags &= ~(DCERPC_PFC_FLAG_FIRST |DCERPC_PFC_FLAG_LAST);
1065
1066 if (remaining == stub_data->length) {
1067 pkt.pfc_flags |= DCERPC_PFC_FLAG_FIRST;
1068 }
1069 if (chunk == remaining) {
1070 pkt.pfc_flags |= DCERPC_PFC_FLAG_LAST;
1071 last_frag = true;
1072 }
1073
1074 pkt.u.request.stub_and_verifier.data = stub_data->data +
1075 (stub_data->length - remaining);
1076 pkt.u.request.stub_and_verifier.length = chunk;
1077
1078 req->status = ncacn_push_request_sign(p->conn, &blob, req, sig_size, &pkt);
1079 if (!NT_STATUS_IS_OK(req->status)) {
1080 req->state = RPC_REQUEST_DONE;
1081 DLIST_REMOVE(p->conn->pending, req);
1082 return;
1083 }
1084
1085 if (last_frag && !req->async_call) {
1086 do_trans = true;
1087 }
1088
1089 req->status = p->conn->transport.send_request(p->conn, &blob, do_trans);
1090 if (!NT_STATUS_IS_OK(req->status)) {
1091 req->state = RPC_REQUEST_DONE;
1092 DLIST_REMOVE(p->conn->pending, req);
1093 return;
1094 }
1095
1096 if (last_frag && !do_trans) {
1097 req->status = p->conn->transport.send_read(p->conn);
1098 if (!NT_STATUS_IS_OK(req->status)) {
1099 req->state = RPC_REQUEST_DONE;
1100 DLIST_REMOVE(p->conn->pending, req);
1101 return;
1102 }
1103 }
1104
1105 remaining -= chunk;
1106 }
1107 }
1108
1109 /*
1110 return the event context for a dcerpc pipe
1111 used by callers who wish to operate asynchronously
1112 */
1113 _PUBLIC_ struct tevent_context *dcerpc_event_context(struct dcerpc_pipe *p)
1114 {
1115 return p->conn->event_ctx;
1116 }
1117
1118
1119
1120 /*
1121 perform the receive side of a async dcerpc request
1122 */
1123 NTSTATUS dcerpc_request_recv(struct rpc_request *req,
1124 TALLOC_CTX *mem_ctx,
1125 DATA_BLOB *stub_data)
1126 {
1127 NTSTATUS status;
1128
1129 while (req->state != RPC_REQUEST_DONE) {
1130 struct tevent_context *ctx = dcerpc_event_context(req->p);
1131 if (event_loop_once(ctx) != 0) {
1132 return NT_STATUS_CONNECTION_DISCONNECTED;
1133 }
1134 }
1135 *stub_data = req->payload;
1136 status = req->status;
1137 if (stub_data->data) {
1138 stub_data->data = talloc_steal(mem_ctx, stub_data->data);
1139 }
1140 if (NT_STATUS_EQUAL(status, NT_STATUS_NET_WRITE_FAULT)) {
1141 req->p->last_fault_code = req->fault_code;
1142 }
1143 talloc_free(req);
1144 return status;
1145 }
1146
1147 /*
1148 perform a full request/response pair on a dcerpc pipe
1149 */
1150 NTSTATUS dcerpc_request(struct dcerpc_pipe *p,
1151 struct GUID *object,
1152 uint16_t opnum,
1153 TALLOC_CTX *mem_ctx,
1154 DATA_BLOB *stub_data_in,
1155 DATA_BLOB *stub_data_out)
1156 {
1157 struct rpc_request *req;
1158
1159 req = dcerpc_request_send(p, object, opnum, false, stub_data_in);
1160 if (req == NULL) {
1161 return NT_STATUS_NO_MEMORY;
1162 }
1163
1164 return dcerpc_request_recv(req, mem_ctx, stub_data_out);
1165 }
1166
1167
1168 /*
1169 this is a paranoid NDR validator. For every packet we push onto the wire
1170 we pull it back again, then push it again. Then we compare the raw NDR data
1171 for that to the NDR we initially generated. If they don't match then we know
1172 we must have a bug in either the pull or push side of our code
1173 */
1174 static NTSTATUS dcerpc_ndr_validate_in(struct dcerpc_connection *c,
1175 TALLOC_CTX *mem_ctx,
1176 DATA_BLOB blob,
1177 size_t struct_size,
1178 ndr_push_flags_fn_t ndr_push,
1179 ndr_pull_flags_fn_t ndr_pull)
1180 {
1181 void *st;
1182 struct ndr_pull *pull;
1183 struct ndr_push *push;
1184 DATA_BLOB blob2;
1185 enum ndr_err_code ndr_err;
1186
1187 st = talloc_size(mem_ctx, struct_size);
1188 if (!st) {
1189 return NT_STATUS_NO_MEMORY;
1190 }
1191
1192 pull = ndr_pull_init_flags(c, &blob, mem_ctx);
1193 if (!pull) {
1194 return NT_STATUS_NO_MEMORY;
1195 }
1196 pull->flags |= LIBNDR_FLAG_REF_ALLOC;
1197
1198 ndr_err = ndr_pull(pull, NDR_IN, st);
1199 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1200 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1201 ndr_err = ndr_pull_error(pull, NDR_ERR_VALIDATE,
1202 "failed input validation pull - %s",
1203 nt_errstr(status));
1204 return ndr_map_error2ntstatus(ndr_err);
1205 }
1206
1207 push = ndr_push_init_ctx(mem_ctx, c->iconv_convenience);
1208 if (!push) {
1209 return NT_STATUS_NO_MEMORY;
1210 }
1211
1212 ndr_err = ndr_push(push, NDR_IN, st);
1213 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1214 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1215 ndr_err = ndr_pull_error(pull, NDR_ERR_VALIDATE,
1216 "failed input validation push - %s",
1217 nt_errstr(status));
1218 return ndr_map_error2ntstatus(ndr_err);
1219 }
1220
1221 blob2 = ndr_push_blob(push);
1222
1223 if (data_blob_cmp(&blob, &blob2) != 0) {
1224 DEBUG(3,("original:\n"));
1225 dump_data(3, blob.data, blob.length);
1226 DEBUG(3,("secondary:\n"));
1227 dump_data(3, blob2.data, blob2.length);
1228 ndr_err = ndr_pull_error(pull, NDR_ERR_VALIDATE,
1229 "failed input validation blobs doesn't match");
1230 return ndr_map_error2ntstatus(ndr_err);
1231 }
1232
1233 return NT_STATUS_OK;
1234 }
1235
1236 /*
1237 this is a paranoid NDR input validator. For every packet we pull
1238 from the wire we push it back again then pull and push it
1239 again. Then we compare the raw NDR data for that to the NDR we
1240 initially generated. If they don't match then we know we must have a
1241 bug in either the pull or push side of our code
1242 */
1243 static NTSTATUS dcerpc_ndr_validate_out(struct dcerpc_connection *c,
1244 struct ndr_pull *pull_in,
1245 void *struct_ptr,
1246 size_t struct_size,
1247 ndr_push_flags_fn_t ndr_push,
1248 ndr_pull_flags_fn_t ndr_pull,
1249 ndr_print_function_t ndr_print)
1250 {
1251 void *st;
1252 struct ndr_pull *pull;
1253 struct ndr_push *push;
1254 DATA_BLOB blob, blob2;
1255 TALLOC_CTX *mem_ctx = pull_in;
1256 char *s1, *s2;
1257 enum ndr_err_code ndr_err;
1258
1259 st = talloc_size(mem_ctx, struct_size);
1260 if (!st) {
1261 return NT_STATUS_NO_MEMORY;
1262 }
1263 memcpy(st, struct_ptr, struct_size);
1264
1265 push = ndr_push_init_ctx(mem_ctx, c->iconv_convenience);
1266 if (!push) {
1267 return NT_STATUS_NO_MEMORY;
1268 }
1269
1270 ndr_err = ndr_push(push, NDR_OUT, struct_ptr);
1271 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1272 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1273 ndr_err = ndr_push_error(push, NDR_ERR_VALIDATE,
1274 "failed output validation push - %s",
1275 nt_errstr(status));
1276 return ndr_map_error2ntstatus(ndr_err);
1277 }
1278
1279 blob = ndr_push_blob(push);
1280
1281 pull = ndr_pull_init_flags(c, &blob, mem_ctx);
1282 if (!pull) {
1283 return NT_STATUS_NO_MEMORY;
1284 }
1285
1286 pull->flags |= LIBNDR_FLAG_REF_ALLOC;
1287 ndr_err = ndr_pull(pull, NDR_OUT, st);
1288 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1289 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1290 ndr_err = ndr_pull_error(pull, NDR_ERR_VALIDATE,
1291 "failed output validation pull - %s",
1292 nt_errstr(status));
1293 return ndr_map_error2ntstatus(ndr_err);
1294 }
1295
1296 push = ndr_push_init_ctx(mem_ctx, c->iconv_convenience);
1297 if (!push) {
1298 return NT_STATUS_NO_MEMORY;
1299 }
1300
1301 ndr_err = ndr_push(push, NDR_OUT, st);
1302 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1303 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1304 ndr_err = ndr_push_error(push, NDR_ERR_VALIDATE,
1305 "failed output validation push2 - %s",
1306 nt_errstr(status));
1307 return ndr_map_error2ntstatus(ndr_err);
1308 }
1309
1310 blob2 = ndr_push_blob(push);
1311
1312 if (data_blob_cmp(&blob, &blob2) != 0) {
1313 DEBUG(3,("original:\n"));
1314 dump_data(3, blob.data, blob.length);
1315 DEBUG(3,("secondary:\n"));
1316 dump_data(3, blob2.data, blob2.length);
1317 ndr_err = ndr_push_error(push, NDR_ERR_VALIDATE,
1318 "failed output validation blobs doesn't match");
1319 return ndr_map_error2ntstatus(ndr_err);
1320 }
1321
1322 /* this checks the printed forms of the two structures, which effectively
1323 tests all of the value() attributes */
1324 s1 = ndr_print_function_string(mem_ctx, ndr_print, "VALIDATE",
1325 NDR_OUT, struct_ptr);
1326 s2 = ndr_print_function_string(mem_ctx, ndr_print, "VALIDATE",
1327 NDR_OUT, st);
1328 if (strcmp(s1, s2) != 0) {
1329 #if 1
1330 DEBUG(3,("VALIDATE ERROR:\nWIRE:\n%s\n GEN:\n%s\n", s1, s2));
1331 #else
1332 /* this is sometimes useful */
1333 printf("VALIDATE ERROR\n");
1334 file_save("wire.dat", s1, strlen(s1));
1335 file_save("gen.dat", s2, strlen(s2));
1336 system("diff -u wire.dat gen.dat");
1337 #endif
1338 ndr_err = ndr_push_error(push, NDR_ERR_VALIDATE,
1339 "failed output validation strings doesn't match");
1340 return ndr_map_error2ntstatus(ndr_err);
1341 }
1342
1343 return NT_STATUS_OK;
1344 }
1345
1346
1347 /**
1348 send a rpc request given a dcerpc_call structure
1349 */
1350 struct rpc_request *dcerpc_ndr_request_send(struct dcerpc_pipe *p,
1351 const struct GUID *object,
1352 const struct ndr_interface_table *table,
1353 uint32_t opnum,
1354 bool async,
1355 TALLOC_CTX *mem_ctx,
1356 void *r)
1357 {
1358 const struct ndr_interface_call *call;
1359 struct ndr_push *push;
1360 NTSTATUS status;
1361 DATA_BLOB request;
1362 struct rpc_request *req;
1363 enum ndr_err_code ndr_err;
1364
1365 call = &table->calls[opnum];
1366
1367 /* setup for a ndr_push_* call */
1368 push = ndr_push_init_ctx(mem_ctx, p->conn->iconv_convenience);
1369 if (!push) {
1370 return NULL;
1371 }
1372
1373 if (p->conn->flags & DCERPC_PUSH_BIGENDIAN) {
1374 push->flags |= LIBNDR_FLAG_BIGENDIAN;
1375 }
1376
1377 /* push the structure into a blob */
1378 ndr_err = call->ndr_push(push, NDR_IN, r);
1379 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1380 status = ndr_map_error2ntstatus(ndr_err);
1381 DEBUG(2,("Unable to ndr_push structure in dcerpc_ndr_request_send - %s\n",
1382 nt_errstr(status)));
1383 talloc_free(push);
1384 return NULL;
1385 }
1386
1387 /* retrieve the blob */
1388 request = ndr_push_blob(push);
1389
1390 if (p->conn->flags & DCERPC_DEBUG_VALIDATE_IN) {
1391 status = dcerpc_ndr_validate_in(p->conn, push, request, call->struct_size,
1392 call->ndr_push, call->ndr_pull);
1393 if (!NT_STATUS_IS_OK(status)) {
1394 DEBUG(2,("Validation failed in dcerpc_ndr_request_send - %s\n",
1395 nt_errstr(status)));
1396 talloc_free(push);
1397 return NULL;
1398 }
1399 }
1400
1401 DEBUG(10,("rpc request data:\n"));
1402 dump_data(10, request.data, request.length);
1403
1404 /* make the actual dcerpc request */
1405 req = dcerpc_request_send(p, object, opnum, async, &request);
1406
1407 if (req != NULL) {
1408 req->ndr.table = table;
1409 req->ndr.opnum = opnum;
1410 req->ndr.struct_ptr = r;
1411 req->ndr.mem_ctx = mem_ctx;
1412 }
1413
1414 talloc_free(push);
1415
1416 return req;
1417 }
1418
1419 /*
1420 receive the answer from a dcerpc_ndr_request_send()
1421 */
1422 _PUBLIC_ NTSTATUS dcerpc_ndr_request_recv(struct rpc_request *req)
1423 {
1424 struct dcerpc_pipe *p = req->p;
1425 NTSTATUS status;
1426 DATA_BLOB response;
1427 struct ndr_pull *pull;
1428 uint_t flags;
1429 TALLOC_CTX *mem_ctx = req->ndr.mem_ctx;
1430 void *r = req->ndr.struct_ptr;
1431 uint32_t opnum = req->ndr.opnum;
1432 const struct ndr_interface_table *table = req->ndr.table;
1433 const struct ndr_interface_call *call = &table->calls[opnum];
1434 enum ndr_err_code ndr_err;
1435
1436 /* make sure the recv code doesn't free the request, as we
1437 need to grab the flags element before it is freed */
1438 if (talloc_reference(p, req) == NULL) {
1439 return NT_STATUS_NO_MEMORY;
1440 }
1441
1442 status = dcerpc_request_recv(req, mem_ctx, &response);
1443 if (!NT_STATUS_IS_OK(status)) {
1444 talloc_unlink(p, req);
1445 return status;
1446 }
1447
1448 flags = req->flags;
1449
1450 /* prepare for ndr_pull_* */
1451 pull = ndr_pull_init_flags(p->conn, &response, mem_ctx);
1452 if (!pull) {
1453 talloc_unlink(p, req);
1454 return NT_STATUS_NO_MEMORY;
1455 }
1456
1457 if (pull->data) {
1458 pull->data = talloc_steal(pull, pull->data);
1459 }
1460 talloc_unlink(p, req);
1461
1462 if (flags & DCERPC_PULL_BIGENDIAN) {
1463 pull->flags |= LIBNDR_FLAG_BIGENDIAN;
1464 }
1465
1466 DEBUG(10,("rpc reply data:\n"));
1467 dump_data(10, pull->data, pull->data_size);
1468
1469 /* pull the structure from the blob */
1470 ndr_err = call->ndr_pull(pull, NDR_OUT, r);
1471 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1472 status = ndr_map_error2ntstatus(ndr_err);
1473 dcerpc_log_packet(p->conn->packet_log_dir,
1474 table, opnum, NDR_OUT,
1475 &response);
1476 return status;
1477 }
1478
1479 if (p->conn->flags & DCERPC_DEBUG_VALIDATE_OUT) {
1480 status = dcerpc_ndr_validate_out(p->conn, pull, r, call->struct_size,
1481 call->ndr_push, call->ndr_pull,
1482 call->ndr_print);
1483 if (!NT_STATUS_IS_OK(status)) {
1484 dcerpc_log_packet(p->conn->packet_log_dir,
1485 table, opnum, NDR_OUT,
1486 &response);
1487 return status;
1488 }
1489 }
1490
1491 if (pull->offset != pull->data_size) {
1492 DEBUG(0,("Warning! ignoring %d unread bytes in rpc packet!\n",
1493 pull->data_size - pull->offset));
1494 /* we used to return NT_STATUS_INFO_LENGTH_MISMATCH here,
1495 but it turns out that early versions of NT
1496 (specifically NT3.1) add junk onto the end of rpc
1497 packets, so if we want to interoperate at all with
1498 those versions then we need to ignore this error */
1499 }
1500
1501 /* TODO: make pull context independent from the output mem_ctx and free the pull context */
1502
1503 return NT_STATUS_OK;
1504 }
1505
1506
1507 /*
1508 a useful helper function for synchronous rpc requests
1509
1510 this can be used when you have ndr push/pull functions in the
1511 standard format
1512 */
1513 _PUBLIC_ NTSTATUS dcerpc_ndr_request(struct dcerpc_pipe *p,
1514 const struct GUID *object,
1515 const struct ndr_interface_table *table,
1516 uint32_t opnum,
1517 TALLOC_CTX *mem_ctx,
1518 void *r)
1519 {
1520 struct rpc_request *req;
1521
1522 req = dcerpc_ndr_request_send(p, object, table, opnum, false, mem_ctx, r);
1523 if (req == NULL) {
1524 return NT_STATUS_NO_MEMORY;
1525 }
1526
1527 return dcerpc_ndr_request_recv(req);
1528 }
1529
1530
1531 /*
1532 a useful function for retrieving the server name we connected to
1533 */
1534 _PUBLIC_ const char *dcerpc_server_name(struct dcerpc_pipe *p)
1535 {
1536 if (!p->conn->transport.target_hostname) {
1537 if (!p->conn->transport.peer_name) {
1538 return "";
1539 }
1540 return p->conn->transport.peer_name(p->conn);
1541 }
1542 return p->conn->transport.target_hostname(p->conn);
1543 }
1544
1545
1546 /*
1547 get the dcerpc auth_level for a open connection
1548 */
1549 uint32_t dcerpc_auth_level(struct dcerpc_connection *c)
1550 {
1551 uint8_t auth_level;
1552
1553 if (c->flags & DCERPC_SEAL) {
1554 auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
1555 } else if (c->flags & DCERPC_SIGN) {
1556 auth_level = DCERPC_AUTH_LEVEL_INTEGRITY;
1557 } else if (c->flags & DCERPC_CONNECT) {
1558 auth_level = DCERPC_AUTH_LEVEL_CONNECT;
1559 } else {
1560 auth_level = DCERPC_AUTH_LEVEL_NONE;
1561 }
1562 return auth_level;
1563 }
1564
1565 /*
1566 Receive an alter reply from the transport
1567 */
1568 static void dcerpc_alter_recv_handler(struct rpc_request *req,
1569 DATA_BLOB *raw_packet, struct ncacn_packet *pkt)
1570 {
1571 struct composite_context *c;
1572 struct dcerpc_pipe *recv_pipe;
1573
1574 c = talloc_get_type(req->async.private_data, struct composite_context);
1575 recv_pipe = talloc_get_type(c->private_data, struct dcerpc_pipe);
1576
1577 if (pkt->ptype == DCERPC_PKT_ALTER_RESP &&
1578 pkt->u.alter_resp.num_results == 1 &&
1579 pkt->u.alter_resp.ctx_list[0].result != 0) {
1580 DEBUG(2,("dcerpc: alter_resp failed - reason %d\n",
1581 pkt->u.alter_resp.ctx_list[0].reason));
1582 composite_error(c, dcerpc_map_reason(pkt->u.alter_resp.ctx_list[0].reason));
1583 return;
1584 }
1585
1586 if (pkt->ptype != DCERPC_PKT_ALTER_RESP ||
1587 pkt->u.alter_resp.num_results == 0 ||
1588 pkt->u.alter_resp.ctx_list[0].result != 0) {
1589 composite_error(c, NT_STATUS_NET_WRITE_FAULT);
1590 return;
1591 }
1592
1593 /* the alter_resp might contain a reply set of credentials */
1594 if (recv_pipe->conn->security_state.auth_info &&
1595 pkt->u.alter_resp.auth_info.length) {
1596 enum ndr_err_code ndr_err;
1597 ndr_err = ndr_pull_struct_blob(
1598 &pkt->u.alter_resp.auth_info, recv_pipe,
1599 NULL,
1600 recv_pipe->conn->security_state.auth_info,
1601 (ndr_pull_flags_fn_t)ndr_pull_dcerpc_auth);
1602 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1603 c->status = ndr_map_error2ntstatus(ndr_err);
1604 if (!composite_is_ok(c)) return;
1605 }
1606 }
1607
1608 composite_done(c);
1609 }
1610
1611 /*
1612 send a dcerpc alter_context request
1613 */
1614 struct composite_context *dcerpc_alter_context_send(struct dcerpc_pipe *p,
1615 TALLOC_CTX *mem_ctx,
1616 const struct ndr_syntax_id *syntax,
1617 const struct ndr_syntax_id *transfer_syntax)
1618 {
1619 struct composite_context *c;
1620 struct ncacn_packet pkt;
1621 DATA_BLOB blob;
1622 struct rpc_request *req;
1623
1624 c = composite_create(mem_ctx, p->conn->event_ctx);
1625 if (c == NULL) return NULL;
1626
1627 c->private_data = p;
1628
1629 p->syntax = *syntax;
1630 p->transfer_syntax = *transfer_syntax;
1631
1632 init_ncacn_hdr(p->conn, &pkt);
1633
1634 pkt.ptype = DCERPC_PKT_ALTER;
1635 pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
1636 pkt.call_id = p->conn->call_id;
1637 pkt.auth_length = 0;
1638
1639 if (p->binding->flags & DCERPC_CONCURRENT_MULTIPLEX) {
1640 pkt.pfc_flags |= DCERPC_PFC_FLAG_CONC_MPX;
1641 }
1642
1643 if (p->binding->flags & DCERPC_HEADER_SIGNING) {
1644 pkt.pfc_flags |= DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN;
1645 }
1646
1647 pkt.u.alter.max_xmit_frag = 5840;
1648 pkt.u.alter.max_recv_frag = 5840;
1649 pkt.u.alter.assoc_group_id = p->binding->assoc_group_id;
1650 pkt.u.alter.num_contexts = 1;
1651 pkt.u.alter.ctx_list = talloc_array(c, struct dcerpc_ctx_list, 1);
1652 if (composite_nomem(pkt.u.alter.ctx_list, c)) return c;
1653 pkt.u.alter.ctx_list[0].context_id = p->context_id;
1654 pkt.u.alter.ctx_list[0].num_transfer_syntaxes = 1;
1655 pkt.u.alter.ctx_list[0].abstract_syntax = p->syntax;
1656 pkt.u.alter.ctx_list[0].transfer_syntaxes = &p->transfer_syntax;
1657 pkt.u.alter.auth_info = data_blob(NULL, 0);
1658
1659 /* construct the NDR form of the packet */
1660 c->status = ncacn_push_auth(&blob, mem_ctx, p->conn->iconv_convenience, &pkt,
1661 p->conn->security_state.auth_info);
1662 if (!composite_is_ok(c)) return c;
1663
1664 p->conn->transport.recv_data = dcerpc_recv_data;
1665
1666 /*
1667 * we allocate a dcerpc_request so we can be in the same
1668 * request queue as normal requests
1669 */
1670 req = talloc_zero(c, struct rpc_request);
1671 if (composite_nomem(req, c)) return c;
1672
1673 req->state = RPC_REQUEST_PENDING;
1674 req->call_id = pkt.call_id;
1675 req->async.private_data = c;
1676 req->async.callback = dcerpc_composite_fail;
1677 req->p = p;
1678 req->recv_handler = dcerpc_alter_recv_handler;
1679 DLIST_ADD_END(p->conn->pending, req, struct rpc_request *);
1680 talloc_set_destructor(req, dcerpc_req_dequeue);
1681
1682 c->status = p->conn->transport.send_request(p->conn, &blob, true);
1683 if (!composite_is_ok(c)) return c;
1684
1685 event_add_timed(c->event_ctx, req,
1686 timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
1687 dcerpc_timeout_handler, req);
1688
1689 return c;
1690 }
1691
1692 NTSTATUS dcerpc_alter_context_recv(struct composite_context *ctx)
1693 {
1694 NTSTATUS result = composite_wait(ctx);
1695 talloc_free(ctx);
1696 return result;
1697 }
1698
1699 /*
1700 send a dcerpc alter_context request
1701 */
1702 _PUBLIC_ NTSTATUS dcerpc_alter_context(struct dcerpc_pipe *p,
1703 TALLOC_CTX *mem_ctx,
1704 const struct ndr_syntax_id *syntax,
1705 const struct ndr_syntax_id *transfer_syntax)
1706 {
1707 struct composite_context *creq;
1708 creq = dcerpc_alter_context_send(p, mem_ctx, syntax, transfer_syntax);
1709 return dcerpc_alter_context_recv(creq);
1710 }
reg import