source: branches/samba-3.3.x/source/rpc_parse/parse_rpc.c

Last change on this file was 206, checked in by Herwig Bauernfeind, 17 years ago

Import Samba 3.3 branch at 3.0.0 level (psmedley's port)
File size: 19.5 KB
Line 
1/*
2 * Unix SMB/CIFS implementation.
3 * RPC Pipe client / server routines
4 * Copyright (C) Andrew Tridgell 1992-1997,
5 * Copyright (C) Luke Kenneth Casson Leighton 1996-1997,
6 * Copyright (C) Paul Ashton 1997.
7 * Copyright (C) Jeremy Allison 1999.
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
25#undef DBGC_CLASS
26#define DBGC_CLASS DBGC_RPC_PARSE
27
28/*******************************************************************
29 Inits an RPC_HDR structure.
30********************************************************************/
31
32void init_rpc_hdr(RPC_HDR *hdr, enum RPC_PKT_TYPE pkt_type, uint8 flags,
33 uint32 call_id, int data_len, int auth_len)
34{
35 hdr->major = 5; /* RPC version 5 */
36 hdr->minor = 0; /* minor version 0 */
37 hdr->pkt_type = pkt_type; /* RPC packet type */
38 hdr->flags = flags; /* dce/rpc flags */
39 hdr->pack_type[0] = 0x10; /* little-endian data representation */
40 hdr->pack_type[1] = 0; /* packed data representation */
41 hdr->pack_type[2] = 0; /* packed data representation */
42 hdr->pack_type[3] = 0; /* packed data representation */
43 hdr->frag_len = data_len; /* fragment length, fill in later */
44 hdr->auth_len = auth_len; /* authentication length */
45 hdr->call_id = call_id; /* call identifier - match incoming RPC */
46}
47
48/*******************************************************************
49 Reads or writes an RPC_HDR structure.
50********************************************************************/
51
52bool smb_io_rpc_hdr(const char *desc, RPC_HDR *rpc, prs_struct *ps, int depth)
53{
54 if (rpc == NULL)
55 return False;
56
57 prs_debug(ps, depth, desc, "smb_io_rpc_hdr");
58 depth++;
59
60 if(!prs_uint8 ("major ", ps, depth, &rpc->major))
61 return False;
62
63 if(!prs_uint8 ("minor ", ps, depth, &rpc->minor))
64 return False;
65 if(!prs_uint8 ("pkt_type ", ps, depth, &rpc->pkt_type))
66 return False;
67 if(!prs_uint8 ("flags ", ps, depth, &rpc->flags))
68 return False;
69
70 /* We always marshall in little endian format. */
71 if (MARSHALLING(ps))
72 rpc->pack_type[0] = 0x10;
73
74 if(!prs_uint8("pack_type0", ps, depth, &rpc->pack_type[0]))
75 return False;
76 if(!prs_uint8("pack_type1", ps, depth, &rpc->pack_type[1]))
77 return False;
78 if(!prs_uint8("pack_type2", ps, depth, &rpc->pack_type[2]))
79 return False;
80 if(!prs_uint8("pack_type3", ps, depth, &rpc->pack_type[3]))
81 return False;
82
83 /*
84 * If reading and pack_type[0] == 0 then the data is in big-endian
85 * format. Set the flag in the prs_struct to specify reverse-endainness.
86 */
87
88 if (UNMARSHALLING(ps) && rpc->pack_type[0] == 0) {
89 DEBUG(10,("smb_io_rpc_hdr: PDU data format is big-endian. Setting flag.\n"));
90 prs_set_endian_data(ps, RPC_BIG_ENDIAN);
91 }
92
93 if(!prs_uint16("frag_len ", ps, depth, &rpc->frag_len))
94 return False;
95 if(!prs_uint16("auth_len ", ps, depth, &rpc->auth_len))
96 return False;
97 if(!prs_uint32("call_id ", ps, depth, &rpc->call_id))
98 return False;
99 return True;
100}
101
102/*******************************************************************
103 Reads or writes an RPC_IFACE structure.
104********************************************************************/
105
106static bool smb_io_rpc_iface(const char *desc, RPC_IFACE *ifc, prs_struct *ps, int depth)
107{
108 if (ifc == NULL)
109 return False;
110
111 prs_debug(ps, depth, desc, "smb_io_rpc_iface");
112 depth++;
113
114 if (!prs_align(ps))
115 return False;
116
117 if (!smb_io_uuid( "uuid", &ifc->uuid, ps, depth))
118 return False;
119
120 if(!prs_uint32 ("version", ps, depth, &ifc->if_version))
121 return False;
122
123 return True;
124}
125
126/*******************************************************************
127 Inits an RPC_ADDR_STR structure.
128********************************************************************/
129
130static void init_rpc_addr_str(RPC_ADDR_STR *str, const char *name)
131{
132 str->len = strlen(name) + 1;
133 fstrcpy(str->str, name);
134}
135
136/*******************************************************************
137 Reads or writes an RPC_ADDR_STR structure.
138********************************************************************/
139
140static bool smb_io_rpc_addr_str(const char *desc, RPC_ADDR_STR *str, prs_struct *ps, int depth)
141{
142 if (str == NULL)
143 return False;
144
145 prs_debug(ps, depth, desc, "smb_io_rpc_addr_str");
146 depth++;
147 if(!prs_align(ps))
148 return False;
149
150 if(!prs_uint16 ( "len", ps, depth, &str->len))
151 return False;
152 if(!prs_uint8s (True, "str", ps, depth, (uchar*)str->str, MIN(str->len, sizeof(str->str)) ))
153 return False;
154 return True;
155}
156
157/*******************************************************************
158 Inits an RPC_HDR_BBA structure.
159********************************************************************/
160
161static void init_rpc_hdr_bba(RPC_HDR_BBA *bba, uint16 max_tsize, uint16 max_rsize, uint32 assoc_gid)
162{
163 bba->max_tsize = max_tsize; /* maximum transmission fragment size (0x1630) */
164 bba->max_rsize = max_rsize; /* max receive fragment size (0x1630) */
165 bba->assoc_gid = assoc_gid; /* associated group id (0x0) */
166}
167
168/*******************************************************************
169 Reads or writes an RPC_HDR_BBA structure.
170********************************************************************/
171
172static bool smb_io_rpc_hdr_bba(const char *desc, RPC_HDR_BBA *rpc, prs_struct *ps, int depth)
173{
174 if (rpc == NULL)
175 return False;
176
177 prs_debug(ps, depth, desc, "smb_io_rpc_hdr_bba");
178 depth++;
179
180 if(!prs_uint16("max_tsize", ps, depth, &rpc->max_tsize))
181 return False;
182 if(!prs_uint16("max_rsize", ps, depth, &rpc->max_rsize))
183 return False;
184 if(!prs_uint32("assoc_gid", ps, depth, &rpc->assoc_gid))
185 return False;
186 return True;
187}
188
189/*******************************************************************
190 Inits an RPC_CONTEXT structure.
191 Note the transfer pointer must remain valid until this is marshalled.
192********************************************************************/
193
194void init_rpc_context(RPC_CONTEXT *rpc_ctx, uint16 context_id,
195 const RPC_IFACE *abstract, const RPC_IFACE *transfer)
196{
197 rpc_ctx->context_id = context_id ; /* presentation context identifier (0x0) */
198 rpc_ctx->num_transfer_syntaxes = 1 ; /* the number of syntaxes (has always been 1?)(0x1) */
199
200 /* num and vers. of interface client is using */
201 rpc_ctx->abstract = *abstract;
202
203 /* vers. of interface to use for replies */
204 rpc_ctx->transfer = CONST_DISCARD(RPC_IFACE *, transfer);
205}
206
207/*******************************************************************
208 Inits an RPC_HDR_RB structure.
209 Note the context pointer must remain valid until this is marshalled.
210********************************************************************/
211
212void init_rpc_hdr_rb(RPC_HDR_RB *rpc,
213 uint16 max_tsize, uint16 max_rsize, uint32 assoc_gid,
214 RPC_CONTEXT *context)
215{
216 init_rpc_hdr_bba(&rpc->bba, max_tsize, max_rsize, assoc_gid);
217
218 rpc->num_contexts = 1;
219 rpc->rpc_context = context;
220}
221
222/*******************************************************************
223 Reads or writes an RPC_CONTEXT structure.
224********************************************************************/
225
226bool smb_io_rpc_context(const char *desc, RPC_CONTEXT *rpc_ctx, prs_struct *ps, int depth)
227{
228 int i;
229
230 if (rpc_ctx == NULL)
231 return False;
232
233 if(!prs_align(ps))
234 return False;
235 if(!prs_uint16("context_id ", ps, depth, &rpc_ctx->context_id ))
236 return False;
237 if(!prs_uint8 ("num_transfer_syntaxes", ps, depth, &rpc_ctx->num_transfer_syntaxes))
238 return False;
239
240 /* num_transfer_syntaxes must not be zero. */
241 if (rpc_ctx->num_transfer_syntaxes == 0)
242 return False;
243
244 if(!smb_io_rpc_iface("", &rpc_ctx->abstract, ps, depth))
245 return False;
246
247 if (UNMARSHALLING(ps)) {
248 if (!(rpc_ctx->transfer = PRS_ALLOC_MEM(ps, RPC_IFACE, rpc_ctx->num_transfer_syntaxes))) {
249 return False;
250 }
251 }
252
253 for (i = 0; i < rpc_ctx->num_transfer_syntaxes; i++ ) {
254 if (!smb_io_rpc_iface("", &rpc_ctx->transfer[i], ps, depth))
255 return False;
256 }
257 return True;
258}
259
260/*******************************************************************
261 Reads or writes an RPC_HDR_RB structure.
262********************************************************************/
263
264bool smb_io_rpc_hdr_rb(const char *desc, RPC_HDR_RB *rpc, prs_struct *ps, int depth)
265{
266 int i;
267
268 if (rpc == NULL)
269 return False;
270
271 prs_debug(ps, depth, desc, "smb_io_rpc_hdr_rb");
272 depth++;
273
274 if(!smb_io_rpc_hdr_bba("", &rpc->bba, ps, depth))
275 return False;
276
277 if(!prs_uint8("num_contexts", ps, depth, &rpc->num_contexts))
278 return False;
279
280 /* 3 pad bytes following - will be mopped up by the prs_align in smb_io_rpc_context(). */
281
282 /* num_contexts must not be zero. */
283 if (rpc->num_contexts == 0)
284 return False;
285
286 if (UNMARSHALLING(ps)) {
287 if (!(rpc->rpc_context = PRS_ALLOC_MEM(ps, RPC_CONTEXT, rpc->num_contexts))) {
288 return False;
289 }
290 }
291
292 for (i = 0; i < rpc->num_contexts; i++ ) {
293 if (!smb_io_rpc_context("", &rpc->rpc_context[i], ps, depth))
294 return False;
295 }
296
297 return True;
298}
299
300/*******************************************************************
301 Inits an RPC_RESULTS structure.
302
303 lkclXXXX only one reason at the moment!
304********************************************************************/
305
306static void init_rpc_results(RPC_RESULTS *res,
307 uint8 num_results, uint16 result, uint16 reason)
308{
309 res->num_results = num_results; /* the number of results (0x01) */
310 res->result = result ; /* result (0x00 = accept) */
311 res->reason = reason ; /* reason (0x00 = no reason specified) */
312}
313
314/*******************************************************************
315 Reads or writes an RPC_RESULTS structure.
316
317 lkclXXXX only one reason at the moment!
318********************************************************************/
319
320static bool smb_io_rpc_results(const char *desc, RPC_RESULTS *res, prs_struct *ps, int depth)
321{
322 if (res == NULL)
323 return False;
324
325 prs_debug(ps, depth, desc, "smb_io_rpc_results");
326 depth++;
327
328 if(!prs_align(ps))
329 return False;
330
331 if(!prs_uint8 ("num_results", ps, depth, &res->num_results))
332 return False;
333
334 if(!prs_align(ps))
335 return False;
336
337 if(!prs_uint16("result ", ps, depth, &res->result))
338 return False;
339 if(!prs_uint16("reason ", ps, depth, &res->reason))
340 return False;
341 return True;
342}
343
344/*******************************************************************
345 Init an RPC_HDR_BA structure.
346
347 lkclXXXX only one reason at the moment!
348
349********************************************************************/
350
351void init_rpc_hdr_ba(RPC_HDR_BA *rpc,
352 uint16 max_tsize, uint16 max_rsize, uint32 assoc_gid,
353 const char *pipe_addr,
354 uint8 num_results, uint16 result, uint16 reason,
355 RPC_IFACE *transfer)
356{
357 init_rpc_hdr_bba (&rpc->bba, max_tsize, max_rsize, assoc_gid);
358 init_rpc_addr_str(&rpc->addr, pipe_addr);
359 init_rpc_results (&rpc->res, num_results, result, reason);
360
361 /* the transfer syntax from the request */
362 memcpy(&rpc->transfer, transfer, sizeof(rpc->transfer));
363}
364
365/*******************************************************************
366 Reads or writes an RPC_HDR_BA structure.
367********************************************************************/
368
369bool smb_io_rpc_hdr_ba(const char *desc, RPC_HDR_BA *rpc, prs_struct *ps, int depth)
370{
371 if (rpc == NULL)
372 return False;
373
374 prs_debug(ps, depth, desc, "smb_io_rpc_hdr_ba");
375 depth++;
376
377 if(!smb_io_rpc_hdr_bba("", &rpc->bba, ps, depth))
378 return False;
379 if(!smb_io_rpc_addr_str("", &rpc->addr, ps, depth))
380 return False;
381 if(!smb_io_rpc_results("", &rpc->res, ps, depth))
382 return False;
383 if(!smb_io_rpc_iface("", &rpc->transfer, ps, depth))
384 return False;
385 return True;
386}
387
388/*******************************************************************
389 Init an RPC_HDR_REQ structure.
390********************************************************************/
391
392void init_rpc_hdr_req(RPC_HDR_REQ *hdr, uint32 alloc_hint, uint16 opnum)
393{
394 hdr->alloc_hint = alloc_hint; /* allocation hint */
395 hdr->context_id = 0; /* presentation context identifier */
396 hdr->opnum = opnum; /* opnum */
397}
398
399/*******************************************************************
400 Reads or writes an RPC_HDR_REQ structure.
401********************************************************************/
402
403bool smb_io_rpc_hdr_req(const char *desc, RPC_HDR_REQ *rpc, prs_struct *ps, int depth)
404{
405 if (rpc == NULL)
406 return False;
407
408 prs_debug(ps, depth, desc, "smb_io_rpc_hdr_req");
409 depth++;
410
411 if(!prs_uint32("alloc_hint", ps, depth, &rpc->alloc_hint))
412 return False;
413 if(!prs_uint16("context_id", ps, depth, &rpc->context_id))
414 return False;
415 if(!prs_uint16("opnum ", ps, depth, &rpc->opnum))
416 return False;
417 return True;
418}
419
420/*******************************************************************
421 Reads or writes an RPC_HDR_RESP structure.
422********************************************************************/
423
424bool smb_io_rpc_hdr_resp(const char *desc, RPC_HDR_RESP *rpc, prs_struct *ps, int depth)
425{
426 if (rpc == NULL)
427 return False;
428
429 prs_debug(ps, depth, desc, "smb_io_rpc_hdr_resp");
430 depth++;
431
432 if(!prs_uint32("alloc_hint", ps, depth, &rpc->alloc_hint))
433 return False;
434 if(!prs_uint16("context_id", ps, depth, &rpc->context_id))
435 return False;
436 if(!prs_uint8 ("cancel_ct ", ps, depth, &rpc->cancel_count))
437 return False;
438 if(!prs_uint8 ("reserved ", ps, depth, &rpc->reserved))
439 return False;
440 return True;
441}
442
443/*******************************************************************
444 Reads or writes an RPC_HDR_FAULT structure.
445********************************************************************/
446
447bool smb_io_rpc_hdr_fault(const char *desc, RPC_HDR_FAULT *rpc, prs_struct *ps, int depth)
448{
449 if (rpc == NULL)
450 return False;
451
452 prs_debug(ps, depth, desc, "smb_io_rpc_hdr_fault");
453 depth++;
454
455 if(!prs_dcerpc_status("status ", ps, depth, &rpc->status))
456 return False;
457 if(!prs_uint32("reserved", ps, depth, &rpc->reserved))
458 return False;
459
460 return True;
461}
462
463/*******************************************************************
464 Inits an RPC_HDR_AUTH structure.
465********************************************************************/
466
467void init_rpc_hdr_auth(RPC_HDR_AUTH *rai,
468 uint8 auth_type, uint8 auth_level,
469 uint8 auth_pad_len,
470 uint32 auth_context_id)
471{
472 rai->auth_type = auth_type;
473 rai->auth_level = auth_level;
474 rai->auth_pad_len = auth_pad_len;
475 rai->auth_reserved = 0;
476 rai->auth_context_id = auth_context_id;
477}
478
479/*******************************************************************
480 Reads or writes an RPC_HDR_AUTH structure.
481********************************************************************/
482
483bool smb_io_rpc_hdr_auth(const char *desc, RPC_HDR_AUTH *rai, prs_struct *ps, int depth)
484{
485 if (rai == NULL)
486 return False;
487
488 prs_debug(ps, depth, desc, "smb_io_rpc_hdr_auth");
489 depth++;
490
491 if(!prs_align(ps))
492 return False;
493
494 if(!prs_uint8 ("auth_type ", ps, depth, &rai->auth_type))
495 return False;
496 if(!prs_uint8 ("auth_level ", ps, depth, &rai->auth_level))
497 return False;
498 if(!prs_uint8 ("auth_pad_len ", ps, depth, &rai->auth_pad_len))
499 return False;
500 if(!prs_uint8 ("auth_reserved", ps, depth, &rai->auth_reserved))
501 return False;
502 if(!prs_uint32("auth_context_id", ps, depth, &rai->auth_context_id))
503 return False;
504
505 return True;
506}
507
508/*******************************************************************
509 Checks an RPC_AUTH_VERIFIER structure.
510********************************************************************/
511
512bool rpc_auth_verifier_chk(RPC_AUTH_VERIFIER *rav,
513 const char *signature, uint32 msg_type)
514{
515 return (strequal(rav->signature, signature) && rav->msg_type == msg_type);
516}
517
518/*******************************************************************
519 Inits an RPC_AUTH_VERIFIER structure.
520********************************************************************/
521
522void init_rpc_auth_verifier(RPC_AUTH_VERIFIER *rav,
523 const char *signature, uint32 msg_type)
524{
525 fstrcpy(rav->signature, signature); /* "NTLMSSP" */
526 rav->msg_type = msg_type; /* NTLMSSP_MESSAGE_TYPE */
527}
528
529/*******************************************************************
530 Reads or writes an RPC_AUTH_VERIFIER structure.
531********************************************************************/
532
533bool smb_io_rpc_auth_verifier(const char *desc, RPC_AUTH_VERIFIER *rav, prs_struct *ps, int depth)
534{
535 if (rav == NULL)
536 return False;
537
538 prs_debug(ps, depth, desc, "smb_io_rpc_auth_verifier");
539 depth++;
540
541 /* "NTLMSSP" */
542 if(!prs_string("signature", ps, depth, rav->signature,
543 sizeof(rav->signature)))
544 return False;
545 if(!prs_uint32("msg_type ", ps, depth, &rav->msg_type)) /* NTLMSSP_MESSAGE_TYPE */
546 return False;
547
548 return True;
549}
550
551/*******************************************************************
552 This parses an RPC_AUTH_VERIFIER for schannel. I think
553********************************************************************/
554
555bool smb_io_rpc_schannel_verifier(const char *desc, RPC_AUTH_VERIFIER *rav, prs_struct *ps, int depth)
556{
557 if (rav == NULL)
558 return False;
559
560 prs_debug(ps, depth, desc, "smb_io_rpc_schannel_verifier");
561 depth++;
562
563 if(!prs_string("signature", ps, depth, rav->signature, sizeof(rav->signature)))
564 return False;
565 if(!prs_uint32("msg_type ", ps, depth, &rav->msg_type))
566 return False;
567
568 return True;
569}
570
571/*******************************************************************
572creates an RPC_AUTH_SCHANNEL_NEG structure.
573********************************************************************/
574
575void init_rpc_auth_schannel_neg(RPC_AUTH_SCHANNEL_NEG *neg,
576 const char *domain, const char *myname)
577{
578 neg->type1 = 0;
579 neg->type2 = 0x3;
580 fstrcpy(neg->domain, domain);
581 fstrcpy(neg->myname, myname);
582}
583
584/*******************************************************************
585 Reads or writes an RPC_AUTH_SCHANNEL_NEG structure.
586********************************************************************/
587
588bool smb_io_rpc_auth_schannel_neg(const char *desc, RPC_AUTH_SCHANNEL_NEG *neg,
589 prs_struct *ps, int depth)
590{
591 if (neg == NULL)
592 return False;
593
594 prs_debug(ps, depth, desc, "smb_io_rpc_auth_schannel_neg");
595 depth++;
596
597 if(!prs_align(ps))
598 return False;
599
600 if(!prs_uint32("type1", ps, depth, &neg->type1))
601 return False;
602 if(!prs_uint32("type2", ps, depth, &neg->type2))
603 return False;
604 if(!prs_string("domain ", ps, depth, neg->domain, sizeof(neg->domain)))
605 return False;
606 if(!prs_string("myname ", ps, depth, neg->myname, sizeof(neg->myname)))
607 return False;
608
609 return True;
610}
611
612/*******************************************************************
613reads or writes an RPC_AUTH_SCHANNEL_CHK structure.
614********************************************************************/
615
616bool smb_io_rpc_auth_schannel_chk(const char *desc, int auth_len,
617 RPC_AUTH_SCHANNEL_CHK * chk,
618 prs_struct *ps, int depth)
619{
620 if (chk == NULL)
621 return False;
622
623 prs_debug(ps, depth, desc, "smb_io_rpc_auth_schannel_chk");
624 depth++;
625
626 if ( !prs_uint8s(False, "sig ", ps, depth, chk->sig, sizeof(chk->sig)) )
627 return False;
628
629 if ( !prs_uint8s(False, "seq_num", ps, depth, chk->seq_num, sizeof(chk->seq_num)) )
630 return False;
631
632 if ( !prs_uint8s(False, "packet_digest", ps, depth, chk->packet_digest, sizeof(chk->packet_digest)) )
633 return False;
634
635 if ( auth_len == RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN ) {
636 if ( !prs_uint8s(False, "confounder", ps, depth, chk->confounder, sizeof(chk->confounder)) )
637 return False;
638 }
639
640 return True;
641}
642
643const struct ndr_syntax_id syntax_spoolss = {
644 {
645 0x12345678, 0x1234, 0xabcd,
646 { 0xef, 0x00 },
647 { 0x01, 0x23,
648 0x45, 0x67, 0x89, 0xab }
649 }, 0x01
650};
651
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