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Further fix for 6449
[Samba.git] / source / librpc / rpc / dcerpc_util.c
blob3b8768ccc21452b51bcfdf7f2f8cdad4783bca67
1 /*
2 Unix SMB/CIFS implementation.
3
4 dcerpc utility functions
5
6 Copyright (C) Andrew Tridgell 2003
7 Copyright (C) Jelmer Vernooij 2004
8 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
9 Copyright (C) Rafal Szczesniak 2006
10
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 */
24
25 #include "includes.h"
26 #include "lib/events/events.h"
27 #include "libcli/composite/composite.h"
28 #include "librpc/gen_ndr/ndr_epmapper_c.h"
29 #include "librpc/gen_ndr/ndr_dcerpc.h"
30 #include "librpc/gen_ndr/ndr_misc.h"
31 #include "librpc/rpc/dcerpc_proto.h"
32 #include "auth/credentials/credentials.h"
33 #include "param/param.h"
34
35 /*
36 find a dcerpc call on an interface by name
37 */
38 const struct ndr_interface_call *dcerpc_iface_find_call(const struct ndr_interface_table *iface,
39 const char *name)
40 {
41 int i;
42 for (i=0;i<iface->num_calls;i++) {
43 if (strcmp(iface->calls[i].name, name) == 0) {
44 return &iface->calls[i];
45 }
46 }
47 return NULL;
48 }
49
50 /*
51 push a ncacn_packet into a blob, potentially with auth info
52 */
53 NTSTATUS ncacn_push_auth(DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
54 struct smb_iconv_convenience *iconv_convenience,
55 struct ncacn_packet *pkt,
56 struct dcerpc_auth *auth_info)
57 {
58 struct ndr_push *ndr;
59 enum ndr_err_code ndr_err;
60
61 ndr = ndr_push_init_ctx(mem_ctx, iconv_convenience);
62 if (!ndr) {
63 return NT_STATUS_NO_MEMORY;
64 }
65
66 if (!(pkt->drep[0] & DCERPC_DREP_LE)) {
67 ndr->flags |= LIBNDR_FLAG_BIGENDIAN;
68 }
69
70 if (pkt->pfc_flags & DCERPC_PFC_FLAG_OBJECT_UUID) {
71 ndr->flags |= LIBNDR_FLAG_OBJECT_PRESENT;
72 }
73
74 if (auth_info) {
75 pkt->auth_length = auth_info->credentials.length;
76 } else {
77 pkt->auth_length = 0;
78 }
79
80 ndr_err = ndr_push_ncacn_packet(ndr, NDR_SCALARS|NDR_BUFFERS, pkt);
81 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
82 return ndr_map_error2ntstatus(ndr_err);
83 }
84
85 if (auth_info) {
86 ndr_err = ndr_push_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS, auth_info);
87 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
88 return ndr_map_error2ntstatus(ndr_err);
89 }
90 }
91
92 *blob = ndr_push_blob(ndr);
93
94 /* fill in the frag length */
95 dcerpc_set_frag_length(blob, blob->length);
96
97 return NT_STATUS_OK;
98 }
99
100 #define MAX_PROTSEQ 10
101
102 static const struct {
103 const char *name;
104 enum dcerpc_transport_t transport;
105 int num_protocols;
106 enum epm_protocol protseq[MAX_PROTSEQ];
107 } transports[] = {
108 { "ncacn_np", NCACN_NP, 3,
109 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_SMB, EPM_PROTOCOL_NETBIOS }},
110 { "ncacn_ip_tcp", NCACN_IP_TCP, 3,
111 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_TCP, EPM_PROTOCOL_IP } },
112 { "ncacn_http", NCACN_HTTP, 3,
113 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_HTTP, EPM_PROTOCOL_IP } },
114 { "ncadg_ip_udp", NCACN_IP_UDP, 3,
115 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_UDP, EPM_PROTOCOL_IP } },
116 { "ncalrpc", NCALRPC, 2,
117 { EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_PIPE } },
118 { "ncacn_unix_stream", NCACN_UNIX_STREAM, 2,
119 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_UNIX_DS } },
120 { "ncadg_unix_dgram", NCADG_UNIX_DGRAM, 2,
121 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_UNIX_DS } },
122 { "ncacn_at_dsp", NCACN_AT_DSP, 3,
123 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_APPLETALK, EPM_PROTOCOL_DSP } },
124 { "ncadg_at_ddp", NCADG_AT_DDP, 3,
125 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_APPLETALK, EPM_PROTOCOL_DDP } },
126 { "ncacn_vns_ssp", NCACN_VNS_SPP, 3,
127 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_STREETTALK, EPM_PROTOCOL_VINES_SPP } },
128 { "ncacn_vns_ipc", NCACN_VNS_IPC, 3,
129 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_STREETTALK, EPM_PROTOCOL_VINES_IPC }, },
130 { "ncadg_ipx", NCADG_IPX, 2,
131 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_IPX },
132 },
133 { "ncacn_spx", NCACN_SPX, 3,
134 /* I guess some MS programmer confused the identifier for
135 * EPM_PROTOCOL_UUID (0x0D or 13) with the one for
136 * EPM_PROTOCOL_SPX (0x13) here. -- jelmer*/
137 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_UUID },
138 },
139 };
140
141 static const struct {
142 const char *name;
143 uint32_t flag;
144 } ncacn_options[] = {
145 {"sign", DCERPC_SIGN},
146 {"seal", DCERPC_SEAL},
147 {"connect", DCERPC_CONNECT},
148 {"spnego", DCERPC_AUTH_SPNEGO},
149 {"ntlm", DCERPC_AUTH_NTLM},
150 {"krb5", DCERPC_AUTH_KRB5},
151 {"validate", DCERPC_DEBUG_VALIDATE_BOTH},
152 {"print", DCERPC_DEBUG_PRINT_BOTH},
153 {"padcheck", DCERPC_DEBUG_PAD_CHECK},
154 {"bigendian", DCERPC_PUSH_BIGENDIAN},
155 {"smb2", DCERPC_SMB2}
156 };
157
158 const char *epm_floor_string(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor)
159 {
160 struct ndr_syntax_id syntax;
161 NTSTATUS status;
162
163 switch(epm_floor->lhs.protocol) {
164 case EPM_PROTOCOL_UUID:
165 status = dcerpc_floor_get_lhs_data(epm_floor, &syntax);
166 if (NT_STATUS_IS_OK(status)) {
167 /* lhs is used: UUID */
168 char *uuidstr;
169
170 if (GUID_equal(&syntax.uuid, &ndr_transfer_syntax.uuid)) {
171 return "NDR";
172 }
173
174 if (GUID_equal(&syntax.uuid, &ndr64_transfer_syntax.uuid)) {
175 return "NDR64";
176 }
177
178 uuidstr = GUID_string(mem_ctx, &syntax.uuid);
179
180 return talloc_asprintf(mem_ctx, " uuid %s/0x%02x", uuidstr, syntax.if_version);
181 } else { /* IPX */
182 return talloc_asprintf(mem_ctx, "IPX:%s",
183 data_blob_hex_string(mem_ctx, &epm_floor->rhs.uuid.unknown));
184 }
185
186 case EPM_PROTOCOL_NCACN:
187 return "RPC-C";
188
189 case EPM_PROTOCOL_NCADG:
190 return "RPC";
191
192 case EPM_PROTOCOL_NCALRPC:
193 return "NCALRPC";
194
195 case EPM_PROTOCOL_DNET_NSP:
196 return "DNET/NSP";
197
198 case EPM_PROTOCOL_IP:
199 return talloc_asprintf(mem_ctx, "IP:%s", epm_floor->rhs.ip.ipaddr);
200
201 case EPM_PROTOCOL_PIPE:
202 return talloc_asprintf(mem_ctx, "PIPE:%s", epm_floor->rhs.pipe.path);
203
204 case EPM_PROTOCOL_SMB:
205 return talloc_asprintf(mem_ctx, "SMB:%s", epm_floor->rhs.smb.unc);
206
207 case EPM_PROTOCOL_UNIX_DS:
208 return talloc_asprintf(mem_ctx, "Unix:%s", epm_floor->rhs.unix_ds.path);
209
210 case EPM_PROTOCOL_NETBIOS:
211 return talloc_asprintf(mem_ctx, "NetBIOS:%s", epm_floor->rhs.netbios.name);
212
213 case EPM_PROTOCOL_NETBEUI:
214 return "NETBeui";
215
216 case EPM_PROTOCOL_SPX:
217 return "SPX";
218
219 case EPM_PROTOCOL_NB_IPX:
220 return "NB_IPX";
221
222 case EPM_PROTOCOL_HTTP:
223 return talloc_asprintf(mem_ctx, "HTTP:%d", epm_floor->rhs.http.port);
224
225 case EPM_PROTOCOL_TCP:
226 return talloc_asprintf(mem_ctx, "TCP:%d", epm_floor->rhs.tcp.port);
227
228 case EPM_PROTOCOL_UDP:
229 return talloc_asprintf(mem_ctx, "UDP:%d", epm_floor->rhs.udp.port);
230
231 default:
232 return talloc_asprintf(mem_ctx, "UNK(%02x):", epm_floor->lhs.protocol);
233 }
234 }
235
236
237 /*
238 form a binding string from a binding structure
239 */
240 _PUBLIC_ char *dcerpc_binding_string(TALLOC_CTX *mem_ctx, const struct dcerpc_binding *b)
241 {
242 char *s = talloc_strdup(mem_ctx, "");
243 int i;
244 const char *t_name = NULL;
245
246 if (b->transport != NCA_UNKNOWN) {
247 for (i=0;i<ARRAY_SIZE(transports);i++) {
248 if (transports[i].transport == b->transport) {
249 t_name = transports[i].name;
250 }
251 }
252 if (!t_name) {
253 return NULL;
254 }
255 }
256
257 if (!GUID_all_zero(&b->object.uuid)) {
258 s = talloc_asprintf(s, "%s@",
259 GUID_string(mem_ctx, &b->object.uuid));
260 }
261
262 if (t_name != NULL) {
263 s = talloc_asprintf_append_buffer(s, "%s:", t_name);
264 if (s == NULL) {
265 return NULL;
266 }
267 }
268
269 if (b->host) {
270 s = talloc_asprintf_append_buffer(s, "%s", b->host);
271 }
272
273 if (!b->endpoint && !b->options && !b->flags) {
274 return s;
275 }
276
277 s = talloc_asprintf_append_buffer(s, "[");
278
279 if (b->endpoint) {
280 s = talloc_asprintf_append_buffer(s, "%s", b->endpoint);
281 }
282
283 /* this is a *really* inefficent way of dealing with strings,
284 but this is rarely called and the strings are always short,
285 so I don't care */
286 for (i=0;b->options && b->options[i];i++) {
287 s = talloc_asprintf_append_buffer(s, ",%s", b->options[i]);
288 if (!s) return NULL;
289 }
290
291 for (i=0;i<ARRAY_SIZE(ncacn_options);i++) {
292 if (b->flags & ncacn_options[i].flag) {
293 s = talloc_asprintf_append_buffer(s, ",%s", ncacn_options[i].name);
294 if (!s) return NULL;
295 }
296 }
297
298 s = talloc_asprintf_append_buffer(s, "]");
299
300 return s;
301 }
302
303 /*
304 parse a binding string into a dcerpc_binding structure
305 */
306 _PUBLIC_ NTSTATUS dcerpc_parse_binding(TALLOC_CTX *mem_ctx, const char *s, struct dcerpc_binding **b_out)
307 {
308 struct dcerpc_binding *b;
309 char *options;
310 char *p;
311 int i, j, comma_count;
312
313 b = talloc(mem_ctx, struct dcerpc_binding);
314 if (!b) {
315 return NT_STATUS_NO_MEMORY;
316 }
317
318 p = strchr(s, '@');
319
320 if (p && PTR_DIFF(p, s) == 36) { /* 36 is the length of a UUID */
321 NTSTATUS status;
322
323 status = GUID_from_string(s, &b->object.uuid);
324
325 if (NT_STATUS_IS_ERR(status)) {
326 DEBUG(0, ("Failed parsing UUID\n"));
327 return status;
328 }
329
330 s = p + 1;
331 } else {
332 ZERO_STRUCT(b->object);
333 }
334
335 b->object.if_version = 0;
336
337 p = strchr(s, ':');
338
339 if (p == NULL) {
340 b->transport = NCA_UNKNOWN;
341 } else {
342 char *type = talloc_strndup(mem_ctx, s, PTR_DIFF(p, s));
343 if (!type) {
344 return NT_STATUS_NO_MEMORY;
345 }
346
347 for (i=0;i<ARRAY_SIZE(transports);i++) {
348 if (strcasecmp(type, transports[i].name) == 0) {
349 b->transport = transports[i].transport;
350 break;
351 }
352 }
353
354 if (i==ARRAY_SIZE(transports)) {
355 DEBUG(0,("Unknown dcerpc transport '%s'\n", type));
356 return NT_STATUS_INVALID_PARAMETER;
357 }
358
359 talloc_free(type);
360
361 s = p+1;
362 }
363
364 p = strchr(s, '[');
365 if (p) {
366 b->host = talloc_strndup(b, s, PTR_DIFF(p, s));
367 options = talloc_strdup(mem_ctx, p+1);
368 if (options[strlen(options)-1] != ']') {
369 return NT_STATUS_INVALID_PARAMETER;
370 }
371 options[strlen(options)-1] = 0;
372 } else {
373 b->host = talloc_strdup(b, s);
374 options = NULL;
375 }
376 if (!b->host) {
377 return NT_STATUS_NO_MEMORY;
378 }
379
380 b->target_hostname = b->host;
381
382 b->options = NULL;
383 b->flags = 0;
384 b->assoc_group_id = 0;
385 b->endpoint = NULL;
386
387 if (!options) {
388 *b_out = b;
389 return NT_STATUS_OK;
390 }
391
392 comma_count = count_chars(options, ',');
393
394 b->options = talloc_array(b, const char *, comma_count+2);
395 if (!b->options) {
396 return NT_STATUS_NO_MEMORY;
397 }
398
399 for (i=0; (p = strchr(options, ',')); i++) {
400 b->options[i] = talloc_strndup(b, options, PTR_DIFF(p, options));
401 if (!b->options[i]) {
402 return NT_STATUS_NO_MEMORY;
403 }
404 options = p+1;
405 }
406 b->options[i] = options;
407 b->options[i+1] = NULL;
408
409 /* some options are pre-parsed for convenience */
410 for (i=0;b->options[i];i++) {
411 for (j=0;j<ARRAY_SIZE(ncacn_options);j++) {
412 if (strcasecmp(ncacn_options[j].name, b->options[i]) == 0) {
413 int k;
414 b->flags |= ncacn_options[j].flag;
415 for (k=i;b->options[k];k++) {
416 b->options[k] = b->options[k+1];
417 }
418 i--;
419 break;
420 }
421 }
422 }
423
424 if (b->options[0]) {
425 /* Endpoint is first option */
426 b->endpoint = b->options[0];
427 if (strlen(b->endpoint) == 0) b->endpoint = NULL;
428
429 for (i=0;b->options[i];i++) {
430 b->options[i] = b->options[i+1];
431 }
432 }
433
434 if (b->options[0] == NULL)
435 b->options = NULL;
436
437 *b_out = b;
438 return NT_STATUS_OK;
439 }
440
441 _PUBLIC_ NTSTATUS dcerpc_floor_get_lhs_data(struct epm_floor *epm_floor, struct ndr_syntax_id *syntax)
442 {
443 TALLOC_CTX *mem_ctx = talloc_init("floor_get_lhs_data");
444 struct ndr_pull *ndr = ndr_pull_init_blob(&epm_floor->lhs.lhs_data, mem_ctx, NULL);
445 enum ndr_err_code ndr_err;
446 uint16_t if_version=0;
447
448 ndr->flags |= LIBNDR_FLAG_NOALIGN;
449
450 ndr_err = ndr_pull_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, &syntax->uuid);
451 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
452 talloc_free(mem_ctx);
453 return ndr_map_error2ntstatus(ndr_err);
454 }
455
456 ndr_err = ndr_pull_uint16(ndr, NDR_SCALARS, &if_version);
457 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
458 talloc_free(mem_ctx);
459 return ndr_map_error2ntstatus(ndr_err);
460 }
461
462 syntax->if_version = if_version;
463
464 talloc_free(mem_ctx);
465
466 return NT_STATUS_OK;
467 }
468
469 static DATA_BLOB dcerpc_floor_pack_lhs_data(TALLOC_CTX *mem_ctx, const struct ndr_syntax_id *syntax)
470 {
471 struct ndr_push *ndr = ndr_push_init_ctx(mem_ctx, NULL);
472
473 ndr->flags |= LIBNDR_FLAG_NOALIGN;
474
475 ndr_push_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, &syntax->uuid);
476 ndr_push_uint16(ndr, NDR_SCALARS, syntax->if_version);
477
478 return ndr_push_blob(ndr);
479 }
480
481 const char *dcerpc_floor_get_rhs_data(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor)
482 {
483 switch (epm_floor->lhs.protocol) {
484 case EPM_PROTOCOL_TCP:
485 if (epm_floor->rhs.tcp.port == 0) return NULL;
486 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.tcp.port);
487
488 case EPM_PROTOCOL_UDP:
489 if (epm_floor->rhs.udp.port == 0) return NULL;
490 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.udp.port);
491
492 case EPM_PROTOCOL_HTTP:
493 if (epm_floor->rhs.http.port == 0) return NULL;
494 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.http.port);
495
496 case EPM_PROTOCOL_IP:
497 return talloc_strdup(mem_ctx, epm_floor->rhs.ip.ipaddr);
498
499 case EPM_PROTOCOL_NCACN:
500 return NULL;
501
502 case EPM_PROTOCOL_NCADG:
503 return NULL;
504
505 case EPM_PROTOCOL_SMB:
506 if (strlen(epm_floor->rhs.smb.unc) == 0) return NULL;
507 return talloc_strdup(mem_ctx, epm_floor->rhs.smb.unc);
508
509 case EPM_PROTOCOL_PIPE:
510 if (strlen(epm_floor->rhs.pipe.path) == 0) return NULL;
511 return talloc_strdup(mem_ctx, epm_floor->rhs.pipe.path);
512
513 case EPM_PROTOCOL_NETBIOS:
514 if (strlen(epm_floor->rhs.netbios.name) == 0) return NULL;
515 return talloc_strdup(mem_ctx, epm_floor->rhs.netbios.name);
516
517 case EPM_PROTOCOL_NCALRPC:
518 return NULL;
519
520 case EPM_PROTOCOL_VINES_SPP:
521 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.vines_spp.port);
522
523 case EPM_PROTOCOL_VINES_IPC:
524 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.vines_ipc.port);
525
526 case EPM_PROTOCOL_STREETTALK:
527 return talloc_strdup(mem_ctx, epm_floor->rhs.streettalk.streettalk);
528
529 case EPM_PROTOCOL_UNIX_DS:
530 if (strlen(epm_floor->rhs.unix_ds.path) == 0) return NULL;
531 return talloc_strdup(mem_ctx, epm_floor->rhs.unix_ds.path);
532
533 case EPM_PROTOCOL_NULL:
534 return NULL;
535
536 default:
537 DEBUG(0,("Unsupported lhs protocol %d\n", epm_floor->lhs.protocol));
538 break;
539 }
540
541 return NULL;
542 }
543
544 static NTSTATUS dcerpc_floor_set_rhs_data(TALLOC_CTX *mem_ctx,
545 struct epm_floor *epm_floor,
546 const char *data)
547 {
548 switch (epm_floor->lhs.protocol) {
549 case EPM_PROTOCOL_TCP:
550 epm_floor->rhs.tcp.port = atoi(data);
551 return NT_STATUS_OK;
552
553 case EPM_PROTOCOL_UDP:
554 epm_floor->rhs.udp.port = atoi(data);
555 return NT_STATUS_OK;
556
557 case EPM_PROTOCOL_HTTP:
558 epm_floor->rhs.http.port = atoi(data);
559 return NT_STATUS_OK;
560
561 case EPM_PROTOCOL_IP:
562 epm_floor->rhs.ip.ipaddr = talloc_strdup(mem_ctx, data);
563 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.ip.ipaddr);
564 return NT_STATUS_OK;
565
566 case EPM_PROTOCOL_NCACN:
567 epm_floor->rhs.ncacn.minor_version = 0;
568 return NT_STATUS_OK;
569
570 case EPM_PROTOCOL_NCADG:
571 epm_floor->rhs.ncadg.minor_version = 0;
572 return NT_STATUS_OK;
573
574 case EPM_PROTOCOL_SMB:
575 epm_floor->rhs.smb.unc = talloc_strdup(mem_ctx, data);
576 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.smb.unc);
577 return NT_STATUS_OK;
578
579 case EPM_PROTOCOL_PIPE:
580 epm_floor->rhs.pipe.path = talloc_strdup(mem_ctx, data);
581 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.pipe.path);
582 return NT_STATUS_OK;
583
584 case EPM_PROTOCOL_NETBIOS:
585 epm_floor->rhs.netbios.name = talloc_strdup(mem_ctx, data);
586 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.netbios.name);
587 return NT_STATUS_OK;
588
589 case EPM_PROTOCOL_NCALRPC:
590 return NT_STATUS_OK;
591
592 case EPM_PROTOCOL_VINES_SPP:
593 epm_floor->rhs.vines_spp.port = atoi(data);
594 return NT_STATUS_OK;
595
596 case EPM_PROTOCOL_VINES_IPC:
597 epm_floor->rhs.vines_ipc.port = atoi(data);
598 return NT_STATUS_OK;
599
600 case EPM_PROTOCOL_STREETTALK:
601 epm_floor->rhs.streettalk.streettalk = talloc_strdup(mem_ctx, data);
602 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.streettalk.streettalk);
603 return NT_STATUS_OK;
604
605 case EPM_PROTOCOL_UNIX_DS:
606 epm_floor->rhs.unix_ds.path = talloc_strdup(mem_ctx, data);
607 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.unix_ds.path);
608 return NT_STATUS_OK;
609
610 case EPM_PROTOCOL_NULL:
611 return NT_STATUS_OK;
612
613 default:
614 DEBUG(0,("Unsupported lhs protocol %d\n", epm_floor->lhs.protocol));
615 break;
616 }
617
618 return NT_STATUS_NOT_SUPPORTED;
619 }
620
621 enum dcerpc_transport_t dcerpc_transport_by_endpoint_protocol(int prot)
622 {
623 int i;
624
625 /* Find a transport that has 'prot' as 4th protocol */
626 for (i=0;i<ARRAY_SIZE(transports);i++) {
627 if (transports[i].num_protocols >= 2 &&
628 transports[i].protseq[1] == prot) {
629 return transports[i].transport;
630 }
631 }
632
633 /* Unknown transport */
634 return (unsigned int)-1;
635 }
636
637 _PUBLIC_ enum dcerpc_transport_t dcerpc_transport_by_tower(struct epm_tower *tower)
638 {
639 int i;
640
641 /* Find a transport that matches this tower */
642 for (i=0;i<ARRAY_SIZE(transports);i++) {
643 int j;
644 if (transports[i].num_protocols != tower->num_floors - 2) {
645 continue;
646 }
647
648 for (j = 0; j < transports[i].num_protocols; j++) {
649 if (transports[i].protseq[j] != tower->floors[j+2].lhs.protocol) {
650 break;
651 }
652 }
653
654 if (j == transports[i].num_protocols) {
655 return transports[i].transport;
656 }
657 }
658
659 /* Unknown transport */
660 return (unsigned int)-1;
661 }
662
663 _PUBLIC_ NTSTATUS dcerpc_binding_from_tower(TALLOC_CTX *mem_ctx,
664 struct epm_tower *tower,
665 struct dcerpc_binding **b_out)
666 {
667 NTSTATUS status;
668 struct dcerpc_binding *binding;
669
670 binding = talloc(mem_ctx, struct dcerpc_binding);
671 NT_STATUS_HAVE_NO_MEMORY(binding);
672
673 ZERO_STRUCT(binding->object);
674 binding->options = NULL;
675 binding->host = NULL;
676 binding->target_hostname = NULL;
677 binding->flags = 0;
678 binding->assoc_group_id = 0;
679
680 binding->transport = dcerpc_transport_by_tower(tower);
681
682 if (binding->transport == (unsigned int)-1) {
683 return NT_STATUS_NOT_SUPPORTED;
684 }
685
686 if (tower->num_floors < 1) {
687 return NT_STATUS_OK;
688 }
689
690 /* Set object uuid */
691 status = dcerpc_floor_get_lhs_data(&tower->floors[0], &binding->object);
692
693 if (!NT_STATUS_IS_OK(status)) {
694 DEBUG(1, ("Error pulling object uuid and version: %s", nt_errstr(status)));
695 return status;
696 }
697
698 /* Ignore floor 1, it contains the NDR version info */
699
700 binding->options = NULL;
701
702 /* Set endpoint */
703 if (tower->num_floors >= 4) {
704 binding->endpoint = dcerpc_floor_get_rhs_data(mem_ctx, &tower->floors[3]);
705 } else {
706 binding->endpoint = NULL;
707 }
708
709 /* Set network address */
710 if (tower->num_floors >= 5) {
711 binding->host = dcerpc_floor_get_rhs_data(mem_ctx, &tower->floors[4]);
712 NT_STATUS_HAVE_NO_MEMORY(binding->host);
713 binding->target_hostname = binding->host;
714 }
715 *b_out = binding;
716 return NT_STATUS_OK;
717 }
718
719 _PUBLIC_ NTSTATUS dcerpc_binding_build_tower(TALLOC_CTX *mem_ctx, struct dcerpc_binding *binding, struct epm_tower *tower)
720 {
721 const enum epm_protocol *protseq = NULL;
722 int num_protocols = -1, i;
723 NTSTATUS status;
724
725 /* Find transport */
726 for (i=0;i<ARRAY_SIZE(transports);i++) {
727 if (transports[i].transport == binding->transport) {
728 protseq = transports[i].protseq;
729 num_protocols = transports[i].num_protocols;
730 break;
731 }
732 }
733
734 if (num_protocols == -1) {
735 DEBUG(0, ("Unable to find transport with id '%d'\n", binding->transport));
736 return NT_STATUS_UNSUCCESSFUL;
737 }
738
739 tower->num_floors = 2 + num_protocols;
740 tower->floors = talloc_array(mem_ctx, struct epm_floor, tower->num_floors);
741
742 /* Floor 0 */
743 tower->floors[0].lhs.protocol = EPM_PROTOCOL_UUID;
744
745 tower->floors[0].lhs.lhs_data = dcerpc_floor_pack_lhs_data(mem_ctx, &binding->object);
746
747 tower->floors[0].rhs.uuid.unknown = data_blob_talloc_zero(mem_ctx, 2);
748
749 /* Floor 1 */
750 tower->floors[1].lhs.protocol = EPM_PROTOCOL_UUID;
751
752 tower->floors[1].lhs.lhs_data = dcerpc_floor_pack_lhs_data(mem_ctx,
753 &ndr_transfer_syntax);
754
755 tower->floors[1].rhs.uuid.unknown = data_blob_talloc_zero(mem_ctx, 2);
756
757 /* Floor 2 to num_protocols */
758 for (i = 0; i < num_protocols; i++) {
759 tower->floors[2 + i].lhs.protocol = protseq[i];
760 tower->floors[2 + i].lhs.lhs_data = data_blob_talloc(mem_ctx, NULL, 0);
761 ZERO_STRUCT(tower->floors[2 + i].rhs);
762 dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[2 + i], "");
763 }
764
765 /* The 4th floor contains the endpoint */
766 if (num_protocols >= 2 && binding->endpoint) {
767 status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[3], binding->endpoint);
768 if (NT_STATUS_IS_ERR(status)) {
769 return status;
770 }
771 }
772
773 /* The 5th contains the network address */
774 if (num_protocols >= 3 && binding->host) {
775 if (is_ipaddress(binding->host)) {
776 status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[4],
777 binding->host);
778 } else {
779 /* note that we don't attempt to resolve the
780 name here - when we get a hostname here we
781 are in the client code, and want to put in
782 a wildcard all-zeros IP for the server to
783 fill in */
784 status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[4],
785 "0.0.0.0");
786 }
787 if (NT_STATUS_IS_ERR(status)) {
788 return status;
789 }
790 }
791
792 return NT_STATUS_OK;
793 }
794
795
796 struct epm_map_binding_state {
797 struct dcerpc_binding *binding;
798 const struct ndr_interface_table *table;
799 struct dcerpc_pipe *pipe;
800 struct policy_handle handle;
801 struct GUID guid;
802 struct epm_twr_t twr;
803 struct epm_twr_t *twr_r;
804 struct epm_Map r;
805 };
806
807
808 static void continue_epm_recv_binding(struct composite_context *ctx);
809 static void continue_epm_map(struct rpc_request *req);
810
811
812 /*
813 Stage 2 of epm_map_binding: Receive connected rpc pipe and send endpoint
814 mapping rpc request
815 */
816 static void continue_epm_recv_binding(struct composite_context *ctx)
817 {
818 struct rpc_request *map_req;
819
820 struct composite_context *c = talloc_get_type(ctx->async.private_data,
821 struct composite_context);
822 struct epm_map_binding_state *s = talloc_get_type(c->private_data,
823 struct epm_map_binding_state);
824
825 /* receive result of rpc pipe connect request */
826 c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
827 if (!composite_is_ok(c)) return;
828
829 s->pipe->conn->flags |= DCERPC_NDR_REF_ALLOC;
830
831 /* prepare requested binding parameters */
832 s->binding->object = s->table->syntax_id;
833
834 c->status = dcerpc_binding_build_tower(s->pipe, s->binding, &s->twr.tower);
835 if (!composite_is_ok(c)) return;
836
837 /* with some nice pretty paper around it of course */
838 s->r.in.object = &s->guid;
839 s->r.in.map_tower = &s->twr;
840 s->r.in.entry_handle = &s->handle;
841 s->r.in.max_towers = 1;
842 s->r.out.entry_handle = &s->handle;
843
844 /* send request for an endpoint mapping - a rpc request on connected pipe */
845 map_req = dcerpc_epm_Map_send(s->pipe, c, &s->r);
846 if (composite_nomem(map_req, c)) return;
847
848 composite_continue_rpc(c, map_req, continue_epm_map, c);
849 }
850
851
852 /*
853 Stage 3 of epm_map_binding: Receive endpoint mapping and provide binding details
854 */
855 static void continue_epm_map(struct rpc_request *req)
856 {
857 struct composite_context *c = talloc_get_type(req->async.private_data,
858 struct composite_context);
859 struct epm_map_binding_state *s = talloc_get_type(c->private_data,
860 struct epm_map_binding_state);
861
862 /* receive result of a rpc request */
863 c->status = dcerpc_ndr_request_recv(req);
864 if (!composite_is_ok(c)) return;
865
866 /* check the details */
867 if (s->r.out.result != 0 || *s->r.out.num_towers != 1) {
868 composite_error(c, NT_STATUS_PORT_UNREACHABLE);
869 return;
870 }
871
872 s->twr_r = s->r.out.towers[0].twr;
873 if (s->twr_r == NULL) {
874 composite_error(c, NT_STATUS_PORT_UNREACHABLE);
875 return;
876 }
877
878 if (s->twr_r->tower.num_floors != s->twr.tower.num_floors ||
879 s->twr_r->tower.floors[3].lhs.protocol != s->twr.tower.floors[3].lhs.protocol) {
880 composite_error(c, NT_STATUS_PORT_UNREACHABLE);
881 return;
882 }
883
884 /* get received endpoint */
885 s->binding->endpoint = talloc_reference(s->binding,
886 dcerpc_floor_get_rhs_data(c, &s->twr_r->tower.floors[3]));
887 if (composite_nomem(s->binding->endpoint, c)) return;
888
889 composite_done(c);
890 }
891
892
893 /*
894 Request for endpoint mapping of dcerpc binding - try to request for endpoint
895 unless there is default one.
896 */
897 struct composite_context *dcerpc_epm_map_binding_send(TALLOC_CTX *mem_ctx,
898 struct dcerpc_binding *binding,
899 const struct ndr_interface_table *table,
900 struct event_context *ev,
901 struct loadparm_context *lp_ctx)
902 {
903 struct composite_context *c;
904 struct epm_map_binding_state *s;
905 struct composite_context *pipe_connect_req;
906 struct cli_credentials *anon_creds;
907 struct event_context *new_ev = NULL;
908
909 NTSTATUS status;
910 struct dcerpc_binding *epmapper_binding;
911 int i;
912
913 /* Try to find event context in memory context in case passed
914 * event_context (argument) was NULL. If there's none, just
915 * create a new one.
916 */
917 if (ev == NULL) {
918 ev = event_context_find(mem_ctx);
919 if (ev == NULL) {
920 new_ev = event_context_init(mem_ctx);
921 if (new_ev == NULL) return NULL;
922 ev = new_ev;
923 }
924 }
925
926 /* composite context allocation and setup */
927 c = composite_create(mem_ctx, ev);
928 if (c == NULL) {
929 talloc_free(new_ev);
930 return NULL;
931 }
932 talloc_steal(c, new_ev);
933
934 s = talloc_zero(c, struct epm_map_binding_state);
935 if (composite_nomem(s, c)) return c;
936 c->private_data = s;
937
938 s->binding = binding;
939 s->table = table;
940
941 /* anonymous credentials for rpc connection used to get endpoint mapping */
942 anon_creds = cli_credentials_init(mem_ctx);
943 cli_credentials_set_event_context(anon_creds, ev);
944 cli_credentials_set_anonymous(anon_creds);
945
946 /*
947 First, check if there is a default endpoint specified in the IDL
948 */
949 if (table != NULL) {
950 struct dcerpc_binding *default_binding;
951
952 /* Find one of the default pipes for this interface */
953 for (i = 0; i < table->endpoints->count; i++) {
954 status = dcerpc_parse_binding(mem_ctx, table->endpoints->names[i], &default_binding);
955
956 if (NT_STATUS_IS_OK(status)) {
957 if (binding->transport == NCA_UNKNOWN)
958 binding->transport = default_binding->transport;
959 if (default_binding->transport == binding->transport &&
960 default_binding->endpoint) {
961 binding->endpoint = talloc_reference(binding, default_binding->endpoint);
962 talloc_free(default_binding);
963
964 composite_done(c);
965 return c;
966
967 } else {
968 talloc_free(default_binding);
969 }
970 }
971 }
972 }
973
974 epmapper_binding = talloc_zero(c, struct dcerpc_binding);
975 if (composite_nomem(epmapper_binding, c)) return c;
976
977 /* basic endpoint mapping data */
978 epmapper_binding->transport = binding->transport;
979 epmapper_binding->host = talloc_reference(epmapper_binding, binding->host);
980 epmapper_binding->target_hostname = epmapper_binding->host;
981 epmapper_binding->options = NULL;
982 epmapper_binding->flags = 0;
983 epmapper_binding->assoc_group_id = 0;
984 epmapper_binding->endpoint = NULL;
985
986 /* initiate rpc pipe connection */
987 pipe_connect_req = dcerpc_pipe_connect_b_send(c, epmapper_binding,
988 &ndr_table_epmapper,
989 anon_creds, c->event_ctx,
990 lp_ctx);
991 if (composite_nomem(pipe_connect_req, c)) return c;
992
993 composite_continue(c, pipe_connect_req, continue_epm_recv_binding, c);
994 return c;
995 }
996
997
998 /*
999 Receive result of endpoint mapping request
1000 */
1001 NTSTATUS dcerpc_epm_map_binding_recv(struct composite_context *c)
1002 {
1003 NTSTATUS status = composite_wait(c);
1004
1005 talloc_free(c);
1006 return status;
1007 }
1008
1009
1010 /*
1011 Get endpoint mapping for rpc connection
1012 */
1013 _PUBLIC_ NTSTATUS dcerpc_epm_map_binding(TALLOC_CTX *mem_ctx, struct dcerpc_binding *binding,
1014 const struct ndr_interface_table *table, struct event_context *ev,
1015 struct loadparm_context *lp_ctx)
1016 {
1017 struct composite_context *c;
1018
1019 c = dcerpc_epm_map_binding_send(mem_ctx, binding, table, ev, lp_ctx);
1020 return dcerpc_epm_map_binding_recv(c);
1021 }
1022
1023
1024 struct pipe_auth_state {
1025 struct dcerpc_pipe *pipe;
1026 struct dcerpc_binding *binding;
1027 const struct ndr_interface_table *table;
1028 struct loadparm_context *lp_ctx;
1029 struct cli_credentials *credentials;
1030 };
1031
1032
1033 static void continue_auth_schannel(struct composite_context *ctx);
1034 static void continue_auth(struct composite_context *ctx);
1035 static void continue_auth_none(struct composite_context *ctx);
1036 static void continue_ntlmssp_connection(struct composite_context *ctx);
1037 static void continue_spnego_after_wrong_pass(struct composite_context *ctx);
1038
1039
1040 /*
1041 Stage 2 of pipe_auth: Receive result of schannel bind request
1042 */
1043 static void continue_auth_schannel(struct composite_context *ctx)
1044 {
1045 struct composite_context *c = talloc_get_type(ctx->async.private_data,
1046 struct composite_context);
1047
1048 c->status = dcerpc_bind_auth_schannel_recv(ctx);
1049 if (!composite_is_ok(c)) return;
1050
1051 composite_done(c);
1052 }
1053
1054
1055 /*
1056 Stage 2 of pipe_auth: Receive result of authenticated bind request
1057 */
1058 static void continue_auth(struct composite_context *ctx)
1059 {
1060 struct composite_context *c = talloc_get_type(ctx->async.private_data,
1061 struct composite_context);
1062
1063 c->status = dcerpc_bind_auth_recv(ctx);
1064 if (!composite_is_ok(c)) return;
1065
1066 composite_done(c);
1067 }
1068 /*
1069 Stage 2 of pipe_auth: Receive result of authenticated bind request, but handle fallbacks:
1070 SPNEGO -> NTLMSSP
1071 */
1072 static void continue_auth_auto(struct composite_context *ctx)
1073 {
1074 struct composite_context *c = talloc_get_type(ctx->async.private_data,
1075 struct composite_context);
1076 struct pipe_auth_state *s = talloc_get_type(c->private_data, struct pipe_auth_state);
1077 struct composite_context *sec_conn_req;
1078
1079 c->status = dcerpc_bind_auth_recv(ctx);
1080 if (NT_STATUS_EQUAL(c->status, NT_STATUS_INVALID_PARAMETER)) {
1081 /*
1082 * Retry with NTLMSSP auth as fallback
1083 * send a request for secondary rpc connection
1084 */
1085 sec_conn_req = dcerpc_secondary_connection_send(s->pipe,
1086 s->binding);
1087 composite_continue(c, sec_conn_req, continue_ntlmssp_connection, c);
1088 return;
1089 } else if (NT_STATUS_EQUAL(c->status, NT_STATUS_LOGON_FAILURE)) {
1090 if (cli_credentials_wrong_password(s->credentials)) {
1091 /*
1092 * Retry SPNEGO with a better password
1093 * send a request for secondary rpc connection
1094 */
1095 sec_conn_req = dcerpc_secondary_connection_send(s->pipe,
1096 s->binding);
1097 composite_continue(c, sec_conn_req, continue_spnego_after_wrong_pass, c);
1098 return;
1099 }
1100 }
1101
1102 if (!composite_is_ok(c)) return;
1103
1104 composite_done(c);
1105 }
1106
1107 /*
1108 Stage 3 of pipe_auth (fallback to NTLMSSP case): Receive secondary
1109 rpc connection (the first one can't be used any more, due to the
1110 bind nak) and perform authenticated bind request
1111 */
1112 static void continue_ntlmssp_connection(struct composite_context *ctx)
1113 {
1114 struct composite_context *c;
1115 struct pipe_auth_state *s;
1116 struct composite_context *auth_req;
1117 struct dcerpc_pipe *p2;
1118
1119 c = talloc_get_type(ctx->async.private_data, struct composite_context);
1120 s = talloc_get_type(c->private_data, struct pipe_auth_state);
1121
1122 /* receive secondary rpc connection */
1123 c->status = dcerpc_secondary_connection_recv(ctx, &p2);
1124 if (!composite_is_ok(c)) return;
1125
1126 talloc_steal(s, p2);
1127 talloc_steal(p2, s->pipe);
1128 s->pipe = p2;
1129
1130 /* initiate a authenticated bind */
1131 auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table,
1132 s->credentials, s->lp_ctx,
1133 DCERPC_AUTH_TYPE_NTLMSSP,
1134 dcerpc_auth_level(s->pipe->conn),
1135 s->table->authservices->names[0]);
1136 composite_continue(c, auth_req, continue_auth, c);
1137 }
1138
1139 /*
1140 Stage 3 of pipe_auth (retry on wrong password): Receive secondary
1141 rpc connection (the first one can't be used any more, due to the
1142 bind nak) and perform authenticated bind request
1143 */
1144 static void continue_spnego_after_wrong_pass(struct composite_context *ctx)
1145 {
1146 struct composite_context *c;
1147 struct pipe_auth_state *s;
1148 struct composite_context *auth_req;
1149 struct dcerpc_pipe *p2;
1150
1151 c = talloc_get_type(ctx->async.private_data, struct composite_context);
1152 s = talloc_get_type(c->private_data, struct pipe_auth_state);
1153
1154 /* receive secondary rpc connection */
1155 c->status = dcerpc_secondary_connection_recv(ctx, &p2);
1156 if (!composite_is_ok(c)) return;
1157
1158 talloc_steal(s, p2);
1159 talloc_steal(p2, s->pipe);
1160 s->pipe = p2;
1161
1162 /* initiate a authenticated bind */
1163 auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table,
1164 s->credentials, s->lp_ctx, DCERPC_AUTH_TYPE_SPNEGO,
1165 dcerpc_auth_level(s->pipe->conn),
1166 s->table->authservices->names[0]);
1167 composite_continue(c, auth_req, continue_auth, c);
1168 }
1169
1170
1171 /*
1172 Stage 2 of pipe_auth: Receive result of non-authenticated bind request
1173 */
1174 static void continue_auth_none(struct composite_context *ctx)
1175 {
1176 struct composite_context *c = talloc_get_type(ctx->async.private_data,
1177 struct composite_context);
1178
1179 c->status = dcerpc_bind_auth_none_recv(ctx);
1180 if (!composite_is_ok(c)) return;
1181
1182 composite_done(c);
1183 }
1184
1185
1186 /*
1187 Request to perform an authenticated bind if required. Authentication
1188 is determined using credentials passed and binding flags.
1189 */
1190 struct composite_context *dcerpc_pipe_auth_send(struct dcerpc_pipe *p,
1191 struct dcerpc_binding *binding,
1192 const struct ndr_interface_table *table,
1193 struct cli_credentials *credentials,
1194 struct loadparm_context *lp_ctx)
1195 {
1196 struct composite_context *c;
1197 struct pipe_auth_state *s;
1198 struct composite_context *auth_schannel_req;
1199 struct composite_context *auth_req;
1200 struct composite_context *auth_none_req;
1201 struct dcerpc_connection *conn;
1202 uint8_t auth_type;
1203
1204 /* composite context allocation and setup */
1205 c = composite_create(p, p->conn->event_ctx);
1206 if (c == NULL) return NULL;
1207
1208 s = talloc_zero(c, struct pipe_auth_state);
1209 if (composite_nomem(s, c)) return c;
1210 c->private_data = s;
1211
1212 /* store parameters in state structure */
1213 s->binding = binding;
1214 s->table = table;
1215 s->credentials = credentials;
1216 s->pipe = p;
1217 s->lp_ctx = lp_ctx;
1218
1219 conn = s->pipe->conn;
1220 conn->flags = binding->flags;
1221
1222 /* remember the binding string for possible secondary connections */
1223 conn->binding_string = dcerpc_binding_string(p, binding);
1224
1225 if (cli_credentials_is_anonymous(s->credentials)) {
1226 auth_none_req = dcerpc_bind_auth_none_send(c, s->pipe, s->table);
1227 composite_continue(c, auth_none_req, continue_auth_none, c);
1228 return c;
1229 }
1230
1231 if ((binding->flags & DCERPC_SCHANNEL) &&
1232 !cli_credentials_get_netlogon_creds(s->credentials)) {
1233 /* If we don't already have netlogon credentials for
1234 * the schannel bind, then we have to get these
1235 * first */
1236 auth_schannel_req = dcerpc_bind_auth_schannel_send(c, s->pipe, s->table,
1237 s->credentials, s->lp_ctx,
1238 dcerpc_auth_level(conn));
1239 composite_continue(c, auth_schannel_req, continue_auth_schannel, c);
1240 return c;
1241 }
1242
1243 /*
1244 * we rely on the already authenticated CIFS connection
1245 * if not doing sign or seal
1246 */
1247 if (conn->transport.transport == NCACN_NP &&
1248 !(s->binding->flags & (DCERPC_SIGN|DCERPC_SEAL))) {
1249 auth_none_req = dcerpc_bind_auth_none_send(c, s->pipe, s->table);
1250 composite_continue(c, auth_none_req, continue_auth_none, c);
1251 return c;
1252 }
1253
1254
1255 /* Perform an authenticated DCE-RPC bind
1256 */
1257 if (!(conn->flags & (DCERPC_SIGN|DCERPC_SEAL))) {
1258 /*
1259 we are doing an authenticated connection,
1260 but not using sign or seal. We must force
1261 the CONNECT dcerpc auth type as a NONE auth
1262 type doesn't allow authentication
1263 information to be passed.
1264 */
1265 conn->flags |= DCERPC_CONNECT;
1266 }
1267
1268 if (s->binding->flags & DCERPC_AUTH_SPNEGO) {
1269 auth_type = DCERPC_AUTH_TYPE_SPNEGO;
1270
1271 } else if (s->binding->flags & DCERPC_AUTH_KRB5) {
1272 auth_type = DCERPC_AUTH_TYPE_KRB5;
1273
1274 } else if (s->binding->flags & DCERPC_SCHANNEL) {
1275 auth_type = DCERPC_AUTH_TYPE_SCHANNEL;
1276
1277 } else if (s->binding->flags & DCERPC_AUTH_NTLM) {
1278 auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
1279
1280 } else {
1281 /* try SPNEGO with fallback to NTLMSSP */
1282 auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table,
1283 s->credentials, s->lp_ctx, DCERPC_AUTH_TYPE_SPNEGO,
1284 dcerpc_auth_level(conn),
1285 s->table->authservices->names[0]);
1286 composite_continue(c, auth_req, continue_auth_auto, c);
1287 return c;
1288 }
1289
1290 auth_req = dcerpc_bind_auth_send(c, s->pipe, s->table,
1291 s->credentials, s->lp_ctx, auth_type,
1292 dcerpc_auth_level(conn),
1293 s->table->authservices->names[0]);
1294 composite_continue(c, auth_req, continue_auth, c);
1295 return c;
1296 }
1297
1298
1299 /*
1300 Receive result of authenticated bind request on dcerpc pipe
1301
1302 This returns *p, which may be different to the one originally
1303 supllied, as it rebinds to a new pipe due to authentication fallback
1304
1305 */
1306 NTSTATUS dcerpc_pipe_auth_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
1307 struct dcerpc_pipe **p)
1308 {
1309 NTSTATUS status;
1310
1311 struct pipe_auth_state *s = talloc_get_type(c->private_data,
1312 struct pipe_auth_state);
1313 status = composite_wait(c);
1314 if (!NT_STATUS_IS_OK(status)) {
1315 char *uuid_str = GUID_string(s->pipe, &s->table->syntax_id.uuid);
1316 DEBUG(0, ("Failed to bind to uuid %s - %s\n", uuid_str, nt_errstr(status)));
1317 talloc_free(uuid_str);
1318 } else {
1319 talloc_steal(mem_ctx, s->pipe);
1320 *p = s->pipe;
1321 }
1322
1323 talloc_free(c);
1324 return status;
1325 }
1326
1327
1328 /*
1329 Perform an authenticated bind if needed - sync version
1330
1331 This may change *p, as it rebinds to a new pipe due to authentication fallback
1332 */
1333 _PUBLIC_ NTSTATUS dcerpc_pipe_auth(TALLOC_CTX *mem_ctx,
1334 struct dcerpc_pipe **p,
1335 struct dcerpc_binding *binding,
1336 const struct ndr_interface_table *table,
1337 struct cli_credentials *credentials,
1338 struct loadparm_context *lp_ctx)
1339 {
1340 struct composite_context *c;
1341
1342 c = dcerpc_pipe_auth_send(*p, binding, table, credentials, lp_ctx);
1343 return dcerpc_pipe_auth_recv(c, mem_ctx, p);
1344 }
1345
1346
1347 NTSTATUS dcerpc_generic_session_key(struct dcerpc_connection *c,
1348 DATA_BLOB *session_key)
1349 {
1350 /* this took quite a few CPU cycles to find ... */
1351 session_key->data = discard_const_p(unsigned char, "SystemLibraryDTC");
1352 session_key->length = 16;
1353 return NT_STATUS_OK;
1354 }
1355
1356 /*
1357 fetch the user session key - may be default (above) or the SMB session key
1358 */
1359 _PUBLIC_ NTSTATUS dcerpc_fetch_session_key(struct dcerpc_pipe *p,
1360 DATA_BLOB *session_key)
1361 {
1362 return p->conn->security_state.session_key(p->conn, session_key);
1363 }
1364
1365
1366 /*
1367 log a rpc packet in a format suitable for ndrdump. This is especially useful
1368 for sealed packets, where ethereal cannot easily see the contents
1369
1370 this triggers on a debug level of >= 10
1371 */
1372 _PUBLIC_ void dcerpc_log_packet(const struct ndr_interface_table *ndr,
1373 uint32_t opnum, uint32_t flags,
1374 DATA_BLOB *pkt)
1375 {
1376 const int num_examples = 20;
1377 int i;
1378
1379 if (DEBUGLEVEL < 10) return;
1380
1381 for (i=0;i<num_examples;i++) {
1382 char *name=NULL;
1383 asprintf(&name, "%s/rpclog/%s-%u.%d.%s",
1384 lp_lockdir(global_loadparm), ndr->name, opnum, i,
1385 (flags&NDR_IN)?"in":"out");
1386 if (name == NULL) {
1387 return;
1388 }
1389 if (!file_exist(name)) {
1390 if (file_save(name, pkt->data, pkt->length)) {
1391 DEBUG(10,("Logged rpc packet to %s\n", name));
1392 }
1393 free(name);
1394 break;
1395 }
1396 free(name);
1397 }
1398 }
1399
1400
1401
1402 /*
1403 create a secondary context from a primary connection
1404
1405 this uses dcerpc_alter_context() to create a new dcerpc context_id
1406 */
1407 _PUBLIC_ NTSTATUS dcerpc_secondary_context(struct dcerpc_pipe *p,
1408 struct dcerpc_pipe **pp2,
1409 const struct ndr_interface_table *table)
1410 {
1411 NTSTATUS status;
1412 struct dcerpc_pipe *p2;
1413
1414 p2 = talloc_zero(p, struct dcerpc_pipe);
1415 if (p2 == NULL) {
1416 return NT_STATUS_NO_MEMORY;
1417 }
1418 p2->conn = talloc_reference(p2, p->conn);
1419 p2->request_timeout = p->request_timeout;
1420
1421 p2->context_id = ++p->conn->next_context_id;
1422
1423 p2->syntax = table->syntax_id;
1424
1425 p2->transfer_syntax = ndr_transfer_syntax;
1426
1427 p2->binding = talloc_reference(p2, p->binding);
1428
1429 status = dcerpc_alter_context(p2, p2, &p2->syntax, &p2->transfer_syntax);
1430 if (!NT_STATUS_IS_OK(status)) {
1431 talloc_free(p2);
1432 return status;
1433 }
1434
1435 *pp2 = p2;
1436
1437 return NT_STATUS_OK;
1438 }
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