2 * Unix SMB/CIFS implementation.
3 * RPC Pipe client / server routines
4 * Almost completely rewritten by (C) Jeremy Allison 2005 - 2010
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
20 /* this module apparently provides an implementation of DCE/RPC over a
21 * named pipe (IPC$ connection using SMBtrans). details of DCE/RPC
22 * documentation are available (in on-line form) from the X-Open group.
24 * this module should provide a level of abstraction between SMB
25 * and DCE/RPC, while minimising the amount of mallocs, unnecessary
26 * data copies, and network traffic.
31 #include "system/filesys.h"
32 #include "srv_pipe_internal.h"
33 #include "../librpc/gen_ndr/ndr_schannel.h"
34 #include "../libcli/auth/schannel.h"
35 #include "../libcli/auth/spnego.h"
36 #include "dcesrv_auth_generic.h"
37 #include "dcesrv_spnego.h"
38 #include "rpc_server.h"
40 #include "smbd/smbd.h"
43 #include "rpc_server/srv_pipe.h"
44 #include "rpc_server/rpc_contexts.h"
45 #include "lib/param/param.h"
48 #define DBGC_CLASS DBGC_RPC_SRV
51 * Dump everything from the start of the end up of the provided data
52 * into a file, but only at debug level >= 50
54 static void dump_pdu_region(const char *name
, int v
,
55 DATA_BLOB
*data
, size_t start
, size_t end
)
61 if (DEBUGLEVEL
< 50) return;
63 if (start
> data
->length
|| end
> data
->length
|| start
> end
) return;
65 for (i
= 1; i
< 100; i
++) {
67 fname
= talloc_asprintf(talloc_tos(),
71 fname
= talloc_asprintf(talloc_tos(),
78 fd
= open(fname
, O_WRONLY
|O_CREAT
|O_EXCL
, 0644);
79 if (fd
!= -1 || errno
!= EEXIST
) break;
82 sz
= write(fd
, data
->data
+ start
, end
- start
);
84 if ((sz
!= end
- start
) || (i
!= 0) ) {
85 DEBUG(0, ("Error writing/closing %s: %ld!=%ld %d\n",
86 fname
, (unsigned long)sz
,
87 (unsigned long)end
- start
, i
));
89 DEBUG(0,("created %s\n", fname
));
95 static DATA_BLOB
generic_session_key(void)
97 return data_blob_const("SystemLibraryDTC", 16);
100 /*******************************************************************
101 Generate the next PDU to be returned from the data.
102 ********************************************************************/
104 static NTSTATUS
create_next_packet(TALLOC_CTX
*mem_ctx
,
105 struct pipe_auth_data
*auth
,
108 size_t data_sent_length
,
112 union dcerpc_payload u
;
121 ZERO_STRUCT(u
.response
);
123 /* Set up rpc packet pfc flags. */
124 if (data_sent_length
== 0) {
125 pfc_flags
= DCERPC_PFC_FLAG_FIRST
;
130 /* Work out how much we can fit in a single PDU. */
131 data_left
= rdata
->length
- data_sent_length
;
133 /* Ensure there really is data left to send. */
135 DEBUG(0, ("No data left to send !\n"));
136 return NT_STATUS_BUFFER_TOO_SMALL
;
139 status
= dcerpc_guess_sizes(auth
,
140 DCERPC_RESPONSE_LENGTH
,
142 RPC_MAX_PDU_FRAG_LEN
,
143 SERVER_NDR_PADDING_SIZE
,
144 &data_to_send
, &frag_len
,
145 &auth_len
, &pad_len
);
146 if (!NT_STATUS_IS_OK(status
)) {
150 /* Set up the alloc hint. This should be the data left to send. */
151 u
.response
.alloc_hint
= data_left
;
153 /* Work out if this PDU will be the last. */
154 if (data_sent_length
+ data_to_send
>= rdata
->length
) {
155 pfc_flags
|= DCERPC_PFC_FLAG_LAST
;
158 /* Prepare data to be NDR encoded. */
159 u
.response
.stub_and_verifier
=
160 data_blob_const(rdata
->data
+ data_sent_length
, data_to_send
);
162 /* Store the packet in the data stream. */
163 status
= dcerpc_push_ncacn_packet(mem_ctx
, DCERPC_PKT_RESPONSE
,
164 pfc_flags
, auth_len
, call_id
,
166 if (!NT_STATUS_IS_OK(status
)) {
167 DEBUG(0, ("Failed to marshall RPC Packet.\n"));
172 /* Set the proper length on the pdu, including padding.
173 * Only needed if an auth trailer will be appended. */
174 dcerpc_set_frag_length(frag
, frag
->length
176 + DCERPC_AUTH_TRAILER_LENGTH
181 status
= dcerpc_add_auth_footer(auth
, pad_len
, frag
);
182 if (!NT_STATUS_IS_OK(status
)) {
183 data_blob_free(frag
);
188 *pdu_size
= data_to_send
;
192 /*******************************************************************
193 Generate the next PDU to be returned from the data in p->rdata.
194 ********************************************************************/
196 bool create_next_pdu(struct pipes_struct
*p
)
202 * If we're in the fault state, keep returning fault PDU's until
203 * the pipe gets closed. JRA.
205 if (p
->fault_state
) {
206 setup_fault_pdu(p
, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR
));
210 status
= create_next_packet(p
->mem_ctx
, &p
->auth
,
211 p
->call_id
, &p
->out_data
.rdata
,
212 p
->out_data
.data_sent_length
,
213 &p
->out_data
.frag
, &pdu_size
);
214 if (!NT_STATUS_IS_OK(status
)) {
215 DEBUG(0, ("Failed to create packet with error %s, "
216 "(auth level %u / type %u)\n",
218 (unsigned int)p
->auth
.auth_level
,
219 (unsigned int)p
->auth
.auth_type
));
223 /* Setup the counts for this PDU. */
224 p
->out_data
.data_sent_length
+= pdu_size
;
225 p
->out_data
.current_pdu_sent
= 0;
230 static bool pipe_init_outgoing_data(struct pipes_struct
*p
);
232 /*******************************************************************
233 Marshall a bind_nak pdu.
234 *******************************************************************/
236 static bool setup_bind_nak(struct pipes_struct
*p
, struct ncacn_packet
*pkt
)
239 union dcerpc_payload u
;
241 /* Free any memory in the current return data buffer. */
242 pipe_init_outgoing_data(p
);
245 * Initialize a bind_nak header.
250 u
.bind_nak
.reject_reason
= 0;
253 * Marshall directly into the outgoing PDU space. We
254 * must do this as we need to set to the bind response
255 * header and are never sending more than one PDU here.
258 status
= dcerpc_push_ncacn_packet(p
->mem_ctx
,
260 DCERPC_PFC_FLAG_FIRST
|
261 DCERPC_PFC_FLAG_LAST
,
266 if (!NT_STATUS_IS_OK(status
)) {
270 p
->out_data
.data_sent_length
= 0;
271 p
->out_data
.current_pdu_sent
= 0;
273 TALLOC_FREE(p
->auth
.auth_ctx
);
274 p
->auth
.auth_level
= DCERPC_AUTH_LEVEL_NONE
;
275 p
->auth
.auth_type
= DCERPC_AUTH_TYPE_NONE
;
276 p
->pipe_bound
= False
;
281 /*******************************************************************
282 Marshall a fault pdu.
283 *******************************************************************/
285 bool setup_fault_pdu(struct pipes_struct
*p
, NTSTATUS fault_status
)
288 union dcerpc_payload u
;
290 /* Free any memory in the current return data buffer. */
291 pipe_init_outgoing_data(p
);
294 * Initialize a fault header.
299 u
.fault
.status
= NT_STATUS_V(fault_status
);
300 u
.fault
._pad
= data_blob_talloc_zero(p
->mem_ctx
, 4);
303 * Marshall directly into the outgoing PDU space. We
304 * must do this as we need to set to the bind response
305 * header and are never sending more than one PDU here.
308 status
= dcerpc_push_ncacn_packet(p
->mem_ctx
,
310 DCERPC_PFC_FLAG_FIRST
|
311 DCERPC_PFC_FLAG_LAST
|
312 DCERPC_PFC_FLAG_DID_NOT_EXECUTE
,
317 if (!NT_STATUS_IS_OK(status
)) {
321 p
->out_data
.data_sent_length
= 0;
322 p
->out_data
.current_pdu_sent
= 0;
327 /*******************************************************************
328 Ensure a bind request has the correct abstract & transfer interface.
329 Used to reject unknown binds from Win2k.
330 *******************************************************************/
332 static bool check_bind_req(struct pipes_struct
*p
,
333 struct ndr_syntax_id
* abstract
,
334 struct ndr_syntax_id
* transfer
,
337 struct pipe_rpc_fns
*context_fns
;
340 DEBUG(3,("check_bind_req for %s\n",
341 get_pipe_name_from_syntax(talloc_tos(), abstract
)));
343 /* we have to check all now since win2k introduced a new UUID on the lsaprpc pipe */
344 if (rpc_srv_pipe_exists_by_id(abstract
) &&
345 ndr_syntax_id_equal(transfer
, &ndr_transfer_syntax
)) {
346 DEBUG(3, ("check_bind_req: %s -> %s rpc service\n",
347 rpc_srv_get_pipe_cli_name(abstract
),
348 rpc_srv_get_pipe_srv_name(abstract
)));
353 ok
= init_pipe_handles(p
, abstract
);
355 DEBUG(1, ("Failed to init pipe handles!\n"));
359 context_fns
= talloc(p
, struct pipe_rpc_fns
);
360 if (context_fns
== NULL
) {
361 DEBUG(0,("check_bind_req: talloc() failed!\n"));
365 context_fns
->next
= context_fns
->prev
= NULL
;
366 context_fns
->n_cmds
= rpc_srv_get_pipe_num_cmds(abstract
);
367 context_fns
->cmds
= rpc_srv_get_pipe_cmds(abstract
);
368 context_fns
->context_id
= context_id
;
369 context_fns
->syntax
= *abstract
;
371 /* add to the list of open contexts */
373 DLIST_ADD( p
->contexts
, context_fns
);
379 * Is a named pipe known?
380 * @param[in] cli_filename The pipe name requested by the client
381 * @result Do we want to serve this?
383 bool is_known_pipename(const char *cli_filename
, struct ndr_syntax_id
*syntax
)
385 const char *pipename
= cli_filename
;
388 if (strnequal(pipename
, "\\PIPE\\", 6)) {
392 if (*pipename
== '\\') {
396 if (lp_disable_spoolss() && strequal(pipename
, "spoolss")) {
397 DEBUG(10, ("refusing spoolss access\n"));
401 if (rpc_srv_get_pipe_interface_by_cli_name(pipename
, syntax
)) {
405 status
= smb_probe_module("rpc", pipename
);
406 if (!NT_STATUS_IS_OK(status
)) {
407 DEBUG(10, ("is_known_pipename: %s unknown\n", cli_filename
));
410 DEBUG(10, ("is_known_pipename: %s loaded dynamically\n", pipename
));
413 * Scan the list again for the interface id
415 if (rpc_srv_get_pipe_interface_by_cli_name(pipename
, syntax
)) {
419 DEBUG(10, ("is_known_pipename: pipe %s did not register itself!\n",
425 /*******************************************************************
426 Handle the first part of a SPNEGO bind auth.
427 *******************************************************************/
429 static bool pipe_spnego_auth_bind(struct pipes_struct
*p
,
431 struct dcerpc_auth
*auth_info
,
434 struct spnego_context
*spnego_ctx
;
437 status
= spnego_server_auth_start(p
,
438 (auth_info
->auth_level
==
439 DCERPC_AUTH_LEVEL_INTEGRITY
),
440 (auth_info
->auth_level
==
441 DCERPC_AUTH_LEVEL_PRIVACY
),
443 &auth_info
->credentials
,
447 if (!NT_STATUS_IS_OK(status
)) {
448 DEBUG(0, ("Failed SPNEGO negotiate (%s)\n",
453 /* Make sure data is bound to the memctx, to be freed the caller */
454 talloc_steal(mem_ctx
, response
->data
);
456 p
->auth
.auth_ctx
= spnego_ctx
;
457 p
->auth
.auth_type
= DCERPC_AUTH_TYPE_SPNEGO
;
459 DEBUG(10, ("SPNEGO auth started\n"));
464 /*******************************************************************
465 Handle an schannel bind auth.
466 *******************************************************************/
468 static bool pipe_schannel_auth_bind(struct pipes_struct
*p
,
470 struct dcerpc_auth
*auth_info
,
473 struct NL_AUTH_MESSAGE neg
;
474 struct NL_AUTH_MESSAGE reply
;
477 struct netlogon_creds_CredentialState
*creds
;
478 enum ndr_err_code ndr_err
;
479 struct schannel_state
*schannel_auth
;
480 struct loadparm_context
*lp_ctx
;
482 ndr_err
= ndr_pull_struct_blob(
483 &auth_info
->credentials
, mem_ctx
, &neg
,
484 (ndr_pull_flags_fn_t
)ndr_pull_NL_AUTH_MESSAGE
);
485 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
486 DEBUG(0,("pipe_schannel_auth_bind: Could not unmarshal SCHANNEL auth neg\n"));
490 if (DEBUGLEVEL
>= 10) {
491 NDR_PRINT_DEBUG(NL_AUTH_MESSAGE
, &neg
);
494 if (!(neg
.Flags
& NL_FLAG_OEM_NETBIOS_COMPUTER_NAME
)) {
495 DEBUG(0,("pipe_schannel_auth_bind: Did not receive netbios computer name\n"));
499 lp_ctx
= loadparm_init_s3(p
, loadparm_s3_context());
501 DEBUG(0,("pipe_schannel_auth_bind: loadparm_init_s3() failed!\n"));
506 * The neg.oem_netbios_computer.a key here must match the remote computer name
507 * given in the DOM_CLNT_SRV.uni_comp_name used on all netlogon pipe
508 * operations that use credentials.
512 status
= schannel_get_creds_state(p
, lp_ctx
,
513 neg
.oem_netbios_computer
.a
, &creds
);
516 talloc_unlink(p
, lp_ctx
);
517 if (!NT_STATUS_IS_OK(status
)) {
518 DEBUG(0, ("pipe_schannel_auth_bind: Attempt to bind using schannel without successful serverauth2\n"));
522 schannel_auth
= talloc(p
, struct schannel_state
);
523 if (!schannel_auth
) {
528 schannel_auth
->state
= SCHANNEL_STATE_START
;
529 schannel_auth
->seq_num
= 0;
530 schannel_auth
->initiator
= false;
531 schannel_auth
->creds
= creds
;
534 * JRA. Should we also copy the schannel session key into the pipe session key p->session_key
535 * here ? We do that for NTLMSSP, but the session key is already set up from the vuser
536 * struct of the person who opened the pipe. I need to test this further. JRA.
538 * VL. As we are mapping this to guest set the generic key
539 * "SystemLibraryDTC" key here. It's a bit difficult to test against
540 * W2k3, as it does not allow schannel binds against SAMR and LSA
544 ret
= session_info_set_session_key(p
->session_info
, generic_session_key());
547 DEBUG(0, ("session_info_set_session_key failed\n"));
551 /*** SCHANNEL verifier ***/
553 reply
.MessageType
= NL_NEGOTIATE_RESPONSE
;
555 reply
.Buffer
.dummy
= 5; /* ??? actually I don't think
556 * this has any meaning
559 ndr_err
= ndr_push_struct_blob(response
, mem_ctx
, &reply
,
560 (ndr_push_flags_fn_t
)ndr_push_NL_AUTH_MESSAGE
);
561 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
562 DEBUG(0,("Failed to marshall NL_AUTH_MESSAGE.\n"));
566 if (DEBUGLEVEL
>= 10) {
567 NDR_PRINT_DEBUG(NL_AUTH_MESSAGE
, &reply
);
570 DEBUG(10,("pipe_schannel_auth_bind: schannel auth: domain [%s] myname [%s]\n",
571 neg
.oem_netbios_domain
.a
, neg
.oem_netbios_computer
.a
));
573 /* We're finished with this bind - no more packets. */
574 p
->auth
.auth_ctx
= schannel_auth
;
575 p
->auth
.auth_type
= DCERPC_AUTH_TYPE_SCHANNEL
;
577 p
->pipe_bound
= True
;
582 /*******************************************************************
583 Handle an NTLMSSP bind auth.
584 *******************************************************************/
586 static bool pipe_auth_generic_bind(struct pipes_struct
*p
,
588 struct dcerpc_auth
*auth_info
,
591 struct gensec_security
*gensec_security
= NULL
;
594 status
= auth_generic_server_authtype_start(p
,
595 auth_info
->auth_type
,
596 auth_info
->auth_level
,
597 &auth_info
->credentials
,
601 if (!NT_STATUS_EQUAL(status
, NT_STATUS_OK
)) {
602 DEBUG(0, (__location__
": auth_generic_server_authtype_start failed: %s\n",
607 /* Make sure data is bound to the memctx, to be freed the caller */
608 talloc_steal(mem_ctx
, response
->data
);
610 p
->auth
.auth_ctx
= gensec_security
;
611 p
->auth
.auth_type
= auth_info
->auth_type
;
616 /*******************************************************************
617 Process an NTLMSSP authentication response.
618 If this function succeeds, the user has been authenticated
619 and their domain, name and calling workstation stored in
621 *******************************************************************/
623 static bool pipe_auth_generic_verify_final(TALLOC_CTX
*mem_ctx
,
624 struct gensec_security
*gensec_security
,
625 enum dcerpc_AuthLevel auth_level
,
626 struct auth_session_info
**session_info
)
631 DEBUG(5, (__location__
": checking user details\n"));
633 /* Finally - if the pipe negotiated integrity (sign) or privacy (seal)
634 ensure the underlying NTLMSSP flags are also set. If not we should
637 status
= auth_generic_server_check_flags(gensec_security
,
639 DCERPC_AUTH_LEVEL_INTEGRITY
),
641 DCERPC_AUTH_LEVEL_PRIVACY
));
642 if (!NT_STATUS_IS_OK(status
)) {
643 DEBUG(0, (__location__
": Client failed to negotatie proper "
644 "security for rpc connection\n"));
648 TALLOC_FREE(*session_info
);
650 status
= auth_generic_server_get_user_info(gensec_security
,
651 mem_ctx
, session_info
);
652 if (!NT_STATUS_IS_OK(status
)) {
653 DEBUG(0, (__location__
": failed to obtain the server info "
654 "for authenticated user: %s\n", nt_errstr(status
)));
658 if ((*session_info
)->security_token
== NULL
) {
659 DEBUG(1, ("Auth module failed to provide nt_user_token\n"));
664 * We're an authenticated bind over smb, so the session key needs to
665 * be set to "SystemLibraryDTC". Weird, but this is what Windows
666 * does. See the RPC-SAMBA3SESSIONKEY.
669 ret
= session_info_set_session_key((*session_info
), generic_session_key());
671 DEBUG(0, ("Failed to set session key!\n"));
678 static NTSTATUS
pipe_auth_verify_final(struct pipes_struct
*p
)
680 struct gensec_security
*gensec_security
;
681 struct spnego_context
*spnego_ctx
;
684 switch (p
->auth
.auth_type
) {
685 case DCERPC_AUTH_TYPE_NTLMSSP
:
686 case DCERPC_AUTH_TYPE_KRB5
:
687 gensec_security
= talloc_get_type_abort(p
->auth
.auth_ctx
,
688 struct gensec_security
);
689 if (!pipe_auth_generic_verify_final(p
, gensec_security
,
692 return NT_STATUS_ACCESS_DENIED
;
695 case DCERPC_AUTH_TYPE_SPNEGO
:
696 spnego_ctx
= talloc_get_type_abort(p
->auth
.auth_ctx
,
697 struct spnego_context
);
698 status
= spnego_get_negotiated_mech(spnego_ctx
, &gensec_security
);
699 if (!NT_STATUS_IS_OK(status
)) {
700 DEBUG(0, ("Bad SPNEGO state (%s)\n",
704 if (!pipe_auth_generic_verify_final(p
, gensec_security
,
707 return NT_STATUS_ACCESS_DENIED
;
711 DEBUG(0, (__location__
": incorrect auth type (%u).\n",
712 (unsigned int)p
->auth
.auth_type
));
713 return NT_STATUS_ACCESS_DENIED
;
716 p
->pipe_bound
= true;
721 /*******************************************************************
722 Respond to a pipe bind request.
723 *******************************************************************/
725 static bool api_pipe_bind_req(struct pipes_struct
*p
,
726 struct ncacn_packet
*pkt
)
728 struct dcerpc_auth auth_info
;
730 unsigned int auth_type
= DCERPC_AUTH_TYPE_NONE
;
732 struct ndr_syntax_id id
;
733 union dcerpc_payload u
;
734 struct dcerpc_ack_ctx bind_ack_ctx
;
735 DATA_BLOB auth_resp
= data_blob_null
;
736 DATA_BLOB auth_blob
= data_blob_null
;
738 /* No rebinds on a bound pipe - use alter context. */
740 DEBUG(2,("Rejecting bind request on bound rpc connection\n"));
741 return setup_bind_nak(p
, pkt
);
744 if (pkt
->u
.bind
.num_contexts
== 0) {
745 DEBUG(0, ("api_pipe_bind_req: no rpc contexts around\n"));
750 * Try and find the correct pipe name to ensure
751 * that this is a pipe name we support.
753 id
= pkt
->u
.bind
.ctx_list
[0].abstract_syntax
;
754 if (rpc_srv_pipe_exists_by_id(&id
)) {
755 DEBUG(3, ("api_pipe_bind_req: %s -> %s rpc service\n",
756 rpc_srv_get_pipe_cli_name(&id
),
757 rpc_srv_get_pipe_srv_name(&id
)));
759 status
= smb_probe_module(
760 "rpc", get_pipe_name_from_syntax(
764 if (NT_STATUS_IS_ERR(status
)) {
765 DEBUG(3,("api_pipe_bind_req: Unknown rpc service name "
766 "%s in bind request.\n",
767 get_pipe_name_from_syntax(talloc_tos(), &id
)));
769 return setup_bind_nak(p
, pkt
);
772 if (rpc_srv_get_pipe_interface_by_cli_name(
773 get_pipe_name_from_syntax(talloc_tos(),
776 DEBUG(3, ("api_pipe_bind_req: %s -> %s rpc service\n",
777 rpc_srv_get_pipe_cli_name(&id
),
778 rpc_srv_get_pipe_srv_name(&id
)));
780 DEBUG(0, ("module %s doesn't provide functions for "
782 get_pipe_name_from_syntax(talloc_tos(), &id
),
783 get_pipe_name_from_syntax(talloc_tos(), &id
)));
784 return setup_bind_nak(p
, pkt
);
788 DEBUG(5,("api_pipe_bind_req: make response. %d\n", __LINE__
));
790 if (pkt
->u
.bind
.assoc_group_id
!= 0) {
791 assoc_gid
= pkt
->u
.bind
.assoc_group_id
;
797 * Create the bind response struct.
800 /* If the requested abstract synt uuid doesn't match our client pipe,
801 reject the bind_ack & set the transfer interface synt to all 0's,
802 ver 0 (observed when NT5 attempts to bind to abstract interfaces
804 Needed when adding entries to a DACL from NT5 - SK */
806 if (check_bind_req(p
,
807 &pkt
->u
.bind
.ctx_list
[0].abstract_syntax
,
808 &pkt
->u
.bind
.ctx_list
[0].transfer_syntaxes
[0],
809 pkt
->u
.bind
.ctx_list
[0].context_id
)) {
811 bind_ack_ctx
.result
= 0;
812 bind_ack_ctx
.reason
= 0;
813 bind_ack_ctx
.syntax
= pkt
->u
.bind
.ctx_list
[0].transfer_syntaxes
[0];
815 p
->pipe_bound
= False
;
816 /* Rejection reason: abstract syntax not supported */
817 bind_ack_ctx
.result
= DCERPC_BIND_PROVIDER_REJECT
;
818 bind_ack_ctx
.reason
= DCERPC_BIND_REASON_ASYNTAX
;
819 bind_ack_ctx
.syntax
= null_ndr_syntax_id
;
823 * Check if this is an authenticated bind request.
825 if (pkt
->auth_length
) {
826 /* Quick length check. Won't catch a bad auth footer,
827 * prevents overrun. */
829 if (pkt
->frag_length
< RPC_HEADER_LEN
+
830 DCERPC_AUTH_TRAILER_LENGTH
+
832 DEBUG(0,("api_pipe_bind_req: auth_len (%u) "
833 "too long for fragment %u.\n",
834 (unsigned int)pkt
->auth_length
,
835 (unsigned int)pkt
->frag_length
));
840 * Decode the authentication verifier.
842 status
= dcerpc_pull_dcerpc_auth(pkt
,
843 &pkt
->u
.bind
.auth_info
,
844 &auth_info
, p
->endian
);
845 if (!NT_STATUS_IS_OK(status
)) {
846 DEBUG(0, ("Unable to unmarshall dcerpc_auth.\n"));
850 auth_type
= auth_info
.auth_type
;
852 /* Work out if we have to sign or seal etc. */
853 switch (auth_info
.auth_level
) {
854 case DCERPC_AUTH_LEVEL_INTEGRITY
:
855 p
->auth
.auth_level
= DCERPC_AUTH_LEVEL_INTEGRITY
;
857 case DCERPC_AUTH_LEVEL_PRIVACY
:
858 p
->auth
.auth_level
= DCERPC_AUTH_LEVEL_PRIVACY
;
860 case DCERPC_AUTH_LEVEL_CONNECT
:
861 p
->auth
.auth_level
= DCERPC_AUTH_LEVEL_CONNECT
;
864 DEBUG(0, ("Unexpected auth level (%u).\n",
865 (unsigned int)auth_info
.auth_level
));
870 case DCERPC_AUTH_TYPE_NTLMSSP
:
871 if (!pipe_auth_generic_bind(p
, pkt
,
872 &auth_info
, &auth_resp
)) {
878 case DCERPC_AUTH_TYPE_SCHANNEL
:
879 if (!pipe_schannel_auth_bind(p
, pkt
,
880 &auth_info
, &auth_resp
)) {
885 case DCERPC_AUTH_TYPE_SPNEGO
:
886 if (!pipe_spnego_auth_bind(p
, pkt
,
887 &auth_info
, &auth_resp
)) {
892 case DCERPC_AUTH_TYPE_KRB5
:
893 if (!pipe_auth_generic_bind(p
, pkt
,
894 &auth_info
, &auth_resp
)) {
899 case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM
:
900 if (p
->transport
== NCALRPC
&& p
->ncalrpc_as_system
) {
901 TALLOC_FREE(p
->session_info
);
903 status
= make_session_info_system(p
,
905 if (!NT_STATUS_IS_OK(status
)) {
909 auth_resp
= data_blob_talloc(pkt
,
913 p
->auth
.auth_type
= DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM
;
914 p
->pipe_bound
= true;
920 case DCERPC_AUTH_TYPE_NONE
:
924 DEBUG(0, ("Unknown auth type %x requested.\n", auth_type
));
929 if (auth_type
== DCERPC_AUTH_TYPE_NONE
) {
930 /* Unauthenticated bind request. */
931 /* We're finished - no more packets. */
932 p
->auth
.auth_type
= DCERPC_AUTH_TYPE_NONE
;
933 /* We must set the pipe auth_level here also. */
934 p
->auth
.auth_level
= DCERPC_AUTH_LEVEL_NONE
;
935 p
->pipe_bound
= True
;
936 /* The session key was initialized from the SMB
937 * session in make_internal_rpc_pipe_p */
940 ZERO_STRUCT(u
.bind_ack
);
941 u
.bind_ack
.max_xmit_frag
= RPC_MAX_PDU_FRAG_LEN
;
942 u
.bind_ack
.max_recv_frag
= RPC_MAX_PDU_FRAG_LEN
;
943 u
.bind_ack
.assoc_group_id
= assoc_gid
;
945 /* name has to be \PIPE\xxxxx */
946 u
.bind_ack
.secondary_address
=
947 talloc_asprintf(pkt
, "\\PIPE\\%s",
948 rpc_srv_get_pipe_srv_name(&id
));
949 if (!u
.bind_ack
.secondary_address
) {
950 DEBUG(0, ("Out of memory!\n"));
953 u
.bind_ack
.secondary_address_size
=
954 strlen(u
.bind_ack
.secondary_address
) + 1;
956 u
.bind_ack
.num_results
= 1;
957 u
.bind_ack
.ctx_list
= &bind_ack_ctx
;
959 /* NOTE: We leave the auth_info empty so we can calculate the padding
960 * later and then append the auth_info --simo */
963 * Marshall directly into the outgoing PDU space. We
964 * must do this as we need to set to the bind response
965 * header and are never sending more than one PDU here.
968 status
= dcerpc_push_ncacn_packet(p
->mem_ctx
,
970 DCERPC_PFC_FLAG_FIRST
|
971 DCERPC_PFC_FLAG_LAST
,
976 if (!NT_STATUS_IS_OK(status
)) {
977 DEBUG(0, ("Failed to marshall bind_ack packet. (%s)\n",
981 if (auth_resp
.length
) {
983 status
= dcerpc_push_dcerpc_auth(pkt
,
985 auth_info
.auth_level
,
987 1, /* auth_context_id */
990 if (!NT_STATUS_IS_OK(status
)) {
991 DEBUG(0, ("Marshalling of dcerpc_auth failed.\n"));
996 /* Now that we have the auth len store it into the right place in
997 * the dcerpc header */
998 dcerpc_set_frag_length(&p
->out_data
.frag
,
999 p
->out_data
.frag
.length
+ auth_blob
.length
);
1001 if (auth_blob
.length
) {
1003 if (!data_blob_append(p
->mem_ctx
, &p
->out_data
.frag
,
1004 auth_blob
.data
, auth_blob
.length
)) {
1005 DEBUG(0, ("Append of auth info failed.\n"));
1011 * Setup the lengths for the initial reply.
1014 p
->out_data
.data_sent_length
= 0;
1015 p
->out_data
.current_pdu_sent
= 0;
1017 TALLOC_FREE(auth_blob
.data
);
1022 data_blob_free(&p
->out_data
.frag
);
1023 TALLOC_FREE(auth_blob
.data
);
1024 return setup_bind_nak(p
, pkt
);
1027 /*******************************************************************
1028 This is the "stage3" response after a bind request and reply.
1029 *******************************************************************/
1031 bool api_pipe_bind_auth3(struct pipes_struct
*p
, struct ncacn_packet
*pkt
)
1033 struct dcerpc_auth auth_info
;
1034 DATA_BLOB response
= data_blob_null
;
1035 struct gensec_security
*gensec_security
;
1036 struct spnego_context
*spnego_ctx
;
1039 DEBUG(5, ("api_pipe_bind_auth3: decode request. %d\n", __LINE__
));
1041 if (pkt
->auth_length
== 0) {
1042 DEBUG(0, ("No auth field sent for bind request!\n"));
1046 /* Ensure there's enough data for an authenticated request. */
1047 if (pkt
->frag_length
< RPC_HEADER_LEN
1048 + DCERPC_AUTH_TRAILER_LENGTH
1049 + pkt
->auth_length
) {
1050 DEBUG(0,("api_pipe_ntlmssp_auth_process: auth_len "
1051 "%u is too large.\n",
1052 (unsigned int)pkt
->auth_length
));
1057 * Decode the authentication verifier response.
1060 status
= dcerpc_pull_dcerpc_auth(pkt
,
1061 &pkt
->u
.auth3
.auth_info
,
1062 &auth_info
, p
->endian
);
1063 if (!NT_STATUS_IS_OK(status
)) {
1064 DEBUG(0, ("Failed to unmarshall dcerpc_auth.\n"));
1068 /* We must NEVER look at auth_info->auth_pad_len here,
1069 * as old Samba client code gets it wrong and sends it
1073 if (auth_info
.auth_type
!= p
->auth
.auth_type
) {
1074 DEBUG(0, ("Auth type mismatch! Client sent %d, "
1075 "but auth was started as type %d!\n",
1076 auth_info
.auth_type
, p
->auth
.auth_type
));
1080 switch (auth_info
.auth_type
) {
1081 case DCERPC_AUTH_TYPE_NTLMSSP
:
1082 case DCERPC_AUTH_TYPE_KRB5
:
1083 gensec_security
= talloc_get_type_abort(p
->auth
.auth_ctx
,
1084 struct gensec_security
);
1085 status
= auth_generic_server_step(gensec_security
,
1086 pkt
, &auth_info
.credentials
,
1089 case DCERPC_AUTH_TYPE_SPNEGO
:
1090 spnego_ctx
= talloc_get_type_abort(p
->auth
.auth_ctx
,
1091 struct spnego_context
);
1092 status
= spnego_server_step(spnego_ctx
,
1093 pkt
, &auth_info
.credentials
,
1097 DEBUG(0, (__location__
": incorrect auth type (%u).\n",
1098 (unsigned int)auth_info
.auth_type
));
1102 if (NT_STATUS_EQUAL(status
,
1103 NT_STATUS_MORE_PROCESSING_REQUIRED
) ||
1105 DEBUG(0, (__location__
": This was supposed to be the final "
1106 "leg, but crypto machinery claims a response is "
1107 "needed, aborting auth!\n"));
1108 data_blob_free(&response
);
1111 if (!NT_STATUS_IS_OK(status
)) {
1112 DEBUG(0, ("Auth failed (%s)\n", nt_errstr(status
)));
1116 /* Now verify auth was indeed successful and extract server info */
1117 status
= pipe_auth_verify_final(p
);
1118 if (!NT_STATUS_IS_OK(status
)) {
1119 DEBUG(0, ("Auth Verify failed (%s)\n", nt_errstr(status
)));
1127 TALLOC_FREE(p
->auth
.auth_ctx
);
1131 /****************************************************************************
1132 Deal with an alter context call. Can be third part of 3 leg auth request for
1134 ****************************************************************************/
1136 static bool api_pipe_alter_context(struct pipes_struct
*p
,
1137 struct ncacn_packet
*pkt
)
1139 struct dcerpc_auth auth_info
;
1142 union dcerpc_payload u
;
1143 struct dcerpc_ack_ctx bind_ack_ctx
;
1144 DATA_BLOB auth_resp
= data_blob_null
;
1145 DATA_BLOB auth_blob
= data_blob_null
;
1147 struct gensec_security
*gensec_security
;
1148 struct spnego_context
*spnego_ctx
;
1150 DEBUG(5,("api_pipe_alter_context: make response. %d\n", __LINE__
));
1152 if (pkt
->u
.bind
.assoc_group_id
!= 0) {
1153 assoc_gid
= pkt
->u
.bind
.assoc_group_id
;
1159 * Create the bind response struct.
1162 /* If the requested abstract synt uuid doesn't match our client pipe,
1163 reject the bind_ack & set the transfer interface synt to all 0's,
1164 ver 0 (observed when NT5 attempts to bind to abstract interfaces
1166 Needed when adding entries to a DACL from NT5 - SK */
1168 if (check_bind_req(p
,
1169 &pkt
->u
.bind
.ctx_list
[0].abstract_syntax
,
1170 &pkt
->u
.bind
.ctx_list
[0].transfer_syntaxes
[0],
1171 pkt
->u
.bind
.ctx_list
[0].context_id
)) {
1173 bind_ack_ctx
.result
= 0;
1174 bind_ack_ctx
.reason
= 0;
1175 bind_ack_ctx
.syntax
= pkt
->u
.bind
.ctx_list
[0].transfer_syntaxes
[0];
1177 p
->pipe_bound
= False
;
1178 /* Rejection reason: abstract syntax not supported */
1179 bind_ack_ctx
.result
= DCERPC_BIND_PROVIDER_REJECT
;
1180 bind_ack_ctx
.reason
= DCERPC_BIND_REASON_ASYNTAX
;
1181 bind_ack_ctx
.syntax
= null_ndr_syntax_id
;
1185 * Check if this is an authenticated alter context request.
1187 if (pkt
->auth_length
) {
1188 /* Quick length check. Won't catch a bad auth footer,
1189 * prevents overrun. */
1191 if (pkt
->frag_length
< RPC_HEADER_LEN
+
1192 DCERPC_AUTH_TRAILER_LENGTH
+
1194 DEBUG(0,("api_pipe_alter_context: auth_len (%u) "
1195 "too long for fragment %u.\n",
1196 (unsigned int)pkt
->auth_length
,
1197 (unsigned int)pkt
->frag_length
));
1201 status
= dcerpc_pull_dcerpc_auth(pkt
,
1202 &pkt
->u
.bind
.auth_info
,
1203 &auth_info
, p
->endian
);
1204 if (!NT_STATUS_IS_OK(status
)) {
1205 DEBUG(0, ("Unable to unmarshall dcerpc_auth.\n"));
1209 /* We can only finish if the pipe is unbound for now */
1210 if (p
->pipe_bound
) {
1211 DEBUG(0, (__location__
": Pipe already bound, "
1212 "Altering Context not yet supported!\n"));
1216 if (auth_info
.auth_type
!= p
->auth
.auth_type
) {
1217 DEBUG(0, ("Auth type mismatch! Client sent %d, "
1218 "but auth was started as type %d!\n",
1219 auth_info
.auth_type
, p
->auth
.auth_type
));
1224 switch (auth_info
.auth_type
) {
1225 case DCERPC_AUTH_TYPE_SPNEGO
:
1226 spnego_ctx
= talloc_get_type_abort(p
->auth
.auth_ctx
,
1227 struct spnego_context
);
1228 status
= spnego_server_step(spnego_ctx
,
1230 &auth_info
.credentials
,
1234 case DCERPC_AUTH_TYPE_KRB5
:
1235 case DCERPC_AUTH_TYPE_NTLMSSP
:
1236 gensec_security
= talloc_get_type_abort(p
->auth
.auth_ctx
,
1237 struct gensec_security
);
1238 status
= auth_generic_server_step(gensec_security
,
1240 &auth_info
.credentials
,
1245 DEBUG(3, (__location__
": Usupported auth type (%d) "
1246 "in alter-context call\n",
1247 auth_info
.auth_type
));
1251 if (NT_STATUS_IS_OK(status
)) {
1252 /* third leg of auth, verify auth info */
1253 status
= pipe_auth_verify_final(p
);
1254 if (!NT_STATUS_IS_OK(status
)) {
1255 DEBUG(0, ("Auth Verify failed (%s)\n",
1256 nt_errstr(status
)));
1259 } else if (NT_STATUS_EQUAL(status
,
1260 NT_STATUS_MORE_PROCESSING_REQUIRED
)) {
1261 DEBUG(10, ("More auth legs required.\n"));
1263 DEBUG(0, ("Auth step returned an error (%s)\n",
1264 nt_errstr(status
)));
1269 ZERO_STRUCT(u
.alter_resp
);
1270 u
.alter_resp
.max_xmit_frag
= RPC_MAX_PDU_FRAG_LEN
;
1271 u
.alter_resp
.max_recv_frag
= RPC_MAX_PDU_FRAG_LEN
;
1272 u
.alter_resp
.assoc_group_id
= assoc_gid
;
1274 /* secondary address CAN be NULL
1275 * as the specs say it's ignored.
1276 * It MUST be NULL to have the spoolss working.
1278 u
.alter_resp
.secondary_address
= "";
1279 u
.alter_resp
.secondary_address_size
= 1;
1281 u
.alter_resp
.num_results
= 1;
1282 u
.alter_resp
.ctx_list
= &bind_ack_ctx
;
1284 /* NOTE: We leave the auth_info empty so we can calculate the padding
1285 * later and then append the auth_info --simo */
1288 * Marshall directly into the outgoing PDU space. We
1289 * must do this as we need to set to the bind response
1290 * header and are never sending more than one PDU here.
1293 status
= dcerpc_push_ncacn_packet(p
->mem_ctx
,
1294 DCERPC_PKT_ALTER_RESP
,
1295 DCERPC_PFC_FLAG_FIRST
|
1296 DCERPC_PFC_FLAG_LAST
,
1301 if (!NT_STATUS_IS_OK(status
)) {
1302 DEBUG(0, ("Failed to marshall bind_ack packet. (%s)\n",
1303 nt_errstr(status
)));
1306 if (auth_resp
.length
) {
1308 /* Work out any padding needed before the auth footer. */
1309 pad_len
= p
->out_data
.frag
.length
% SERVER_NDR_PADDING_SIZE
;
1311 pad_len
= SERVER_NDR_PADDING_SIZE
- pad_len
;
1312 DEBUG(10, ("auth pad_len = %u\n",
1313 (unsigned int)pad_len
));
1316 status
= dcerpc_push_dcerpc_auth(pkt
,
1317 auth_info
.auth_type
,
1318 auth_info
.auth_level
,
1320 1, /* auth_context_id */
1323 if (!NT_STATUS_IS_OK(status
)) {
1324 DEBUG(0, ("Marshalling of dcerpc_auth failed.\n"));
1329 /* Now that we have the auth len store it into the right place in
1330 * the dcerpc header */
1331 dcerpc_set_frag_length(&p
->out_data
.frag
,
1332 p
->out_data
.frag
.length
+
1333 pad_len
+ auth_blob
.length
);
1335 if (auth_resp
.length
) {
1337 char pad
[SERVER_NDR_PADDING_SIZE
];
1338 memset(pad
, '\0', SERVER_NDR_PADDING_SIZE
);
1339 if (!data_blob_append(p
->mem_ctx
,
1342 DEBUG(0, ("api_pipe_bind_req: failed to add "
1343 "%u bytes of pad data.\n",
1344 (unsigned int)pad_len
));
1349 if (!data_blob_append(p
->mem_ctx
, &p
->out_data
.frag
,
1350 auth_blob
.data
, auth_blob
.length
)) {
1351 DEBUG(0, ("Append of auth info failed.\n"));
1357 * Setup the lengths for the initial reply.
1360 p
->out_data
.data_sent_length
= 0;
1361 p
->out_data
.current_pdu_sent
= 0;
1363 TALLOC_FREE(auth_blob
.data
);
1368 data_blob_free(&p
->out_data
.frag
);
1369 TALLOC_FREE(auth_blob
.data
);
1370 return setup_bind_nak(p
, pkt
);
1373 static bool api_rpcTNP(struct pipes_struct
*p
, struct ncacn_packet
*pkt
,
1374 const struct api_struct
*api_rpc_cmds
, int n_cmds
,
1375 const struct ndr_syntax_id
*syntax
);
1377 /****************************************************************************
1378 Find the correct RPC function to call for this request.
1379 If the pipe is authenticated then become the correct UNIX user
1380 before doing the call.
1381 ****************************************************************************/
1383 static bool api_pipe_request(struct pipes_struct
*p
,
1384 struct ncacn_packet
*pkt
)
1387 struct pipe_rpc_fns
*pipe_fns
;
1389 if (!p
->pipe_bound
) {
1390 DEBUG(1, ("Pipe not bound!\n"));
1391 data_blob_free(&p
->out_data
.rdata
);
1395 if (!become_authenticated_pipe_user(p
->session_info
)) {
1396 DEBUG(1, ("Failed to become pipe user!\n"));
1397 data_blob_free(&p
->out_data
.rdata
);
1401 /* get the set of RPC functions for this context */
1403 pipe_fns
= find_pipe_fns_by_context(p
->contexts
,
1404 pkt
->u
.request
.context_id
);
1407 TALLOC_CTX
*frame
= talloc_stackframe();
1409 DEBUG(5, ("Requested %s rpc service\n",
1410 get_pipe_name_from_syntax(talloc_tos(), &pipe_fns
->syntax
)));
1412 ret
= api_rpcTNP(p
, pkt
, pipe_fns
->cmds
, pipe_fns
->n_cmds
,
1418 DEBUG(0, ("No rpc function table associated with context "
1420 pkt
->u
.request
.context_id
));
1423 unbecome_authenticated_pipe_user();
1428 /*******************************************************************
1429 Calls the underlying RPC function for a named pipe.
1430 ********************************************************************/
1432 static bool api_rpcTNP(struct pipes_struct
*p
, struct ncacn_packet
*pkt
,
1433 const struct api_struct
*api_rpc_cmds
, int n_cmds
,
1434 const struct ndr_syntax_id
*syntax
)
1439 /* interpret the command */
1440 DEBUG(4,("api_rpcTNP: %s op 0x%x - ",
1441 get_pipe_name_from_syntax(talloc_tos(), syntax
),
1442 pkt
->u
.request
.opnum
));
1444 if (DEBUGLEVEL
>= 50) {
1446 slprintf(name
, sizeof(name
)-1, "in_%s",
1447 get_pipe_name_from_syntax(talloc_tos(), syntax
));
1448 dump_pdu_region(name
, pkt
->u
.request
.opnum
,
1449 &p
->in_data
.data
, 0,
1450 p
->in_data
.data
.length
);
1453 for (fn_num
= 0; fn_num
< n_cmds
; fn_num
++) {
1454 if (api_rpc_cmds
[fn_num
].opnum
== pkt
->u
.request
.opnum
&&
1455 api_rpc_cmds
[fn_num
].fn
!= NULL
) {
1456 DEBUG(3, ("api_rpcTNP: rpc command: %s\n",
1457 api_rpc_cmds
[fn_num
].name
));
1462 if (fn_num
== n_cmds
) {
1464 * For an unknown RPC just return a fault PDU but
1465 * return True to allow RPC's on the pipe to continue
1466 * and not put the pipe into fault state. JRA.
1468 DEBUG(4, ("unknown\n"));
1469 setup_fault_pdu(p
, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR
));
1473 offset1
= p
->out_data
.rdata
.length
;
1475 DEBUG(6, ("api_rpc_cmds[%d].fn == %p\n",
1476 fn_num
, api_rpc_cmds
[fn_num
].fn
));
1477 /* do the actual command */
1478 if(!api_rpc_cmds
[fn_num
].fn(p
)) {
1479 DEBUG(0,("api_rpcTNP: %s: %s failed.\n",
1480 get_pipe_name_from_syntax(talloc_tos(), syntax
),
1481 api_rpc_cmds
[fn_num
].name
));
1482 data_blob_free(&p
->out_data
.rdata
);
1486 if (p
->bad_handle_fault_state
) {
1487 DEBUG(4,("api_rpcTNP: bad handle fault return.\n"));
1488 p
->bad_handle_fault_state
= False
;
1489 setup_fault_pdu(p
, NT_STATUS(DCERPC_FAULT_CONTEXT_MISMATCH
));
1493 if (p
->rng_fault_state
) {
1494 DEBUG(4, ("api_rpcTNP: rng fault return\n"));
1495 p
->rng_fault_state
= False
;
1496 setup_fault_pdu(p
, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR
));
1500 if (DEBUGLEVEL
>= 50) {
1502 slprintf(name
, sizeof(name
)-1, "out_%s",
1503 get_pipe_name_from_syntax(talloc_tos(), syntax
));
1504 dump_pdu_region(name
, pkt
->u
.request
.opnum
,
1505 &p
->out_data
.rdata
, offset1
,
1506 p
->out_data
.rdata
.length
);
1509 DEBUG(5,("api_rpcTNP: called %s successfully\n",
1510 get_pipe_name_from_syntax(talloc_tos(), syntax
)));
1512 /* Check for buffer underflow in rpc parsing */
1513 if ((DEBUGLEVEL
>= 10) &&
1514 (pkt
->frag_length
< p
->in_data
.data
.length
)) {
1515 DEBUG(10, ("api_rpcTNP: rpc input buffer underflow (parse error?)\n"));
1516 dump_data(10, p
->in_data
.data
.data
+ pkt
->frag_length
,
1517 p
->in_data
.data
.length
- pkt
->frag_length
);
1523 /****************************************************************************
1524 Initialise an outgoing packet.
1525 ****************************************************************************/
1527 static bool pipe_init_outgoing_data(struct pipes_struct
*p
)
1529 output_data
*o_data
= &p
->out_data
;
1531 /* Reset the offset counters. */
1532 o_data
->data_sent_length
= 0;
1533 o_data
->current_pdu_sent
= 0;
1535 data_blob_free(&o_data
->frag
);
1537 /* Free any memory in the current return data buffer. */
1538 data_blob_free(&o_data
->rdata
);
1543 /****************************************************************************
1544 Sets the fault state on incoming packets.
1545 ****************************************************************************/
1547 void set_incoming_fault(struct pipes_struct
*p
)
1549 data_blob_free(&p
->in_data
.data
);
1550 p
->in_data
.pdu_needed_len
= 0;
1551 p
->in_data
.pdu
.length
= 0;
1552 p
->fault_state
= True
;
1554 DEBUG(10, ("Setting fault state\n"));
1557 static NTSTATUS
dcesrv_auth_request(struct pipe_auth_data
*auth
,
1558 struct ncacn_packet
*pkt
,
1562 size_t hdr_size
= DCERPC_REQUEST_LENGTH
;
1565 DEBUG(10, ("Checking request auth.\n"));
1567 if (pkt
->pfc_flags
& DCERPC_PFC_FLAG_OBJECT_UUID
) {
1571 /* in case of sealing this function will unseal the data in place */
1572 status
= dcerpc_check_auth(auth
, pkt
,
1573 &pkt
->u
.request
.stub_and_verifier
,
1576 if (!NT_STATUS_IS_OK(status
)) {
1581 /* remove padding and auth trailer,
1582 * this way the caller will get just the data */
1583 if (pkt
->auth_length
) {
1584 size_t trail_len
= pad_len
1585 + DCERPC_AUTH_TRAILER_LENGTH
1587 if (pkt
->u
.request
.stub_and_verifier
.length
< trail_len
) {
1588 return NT_STATUS_INFO_LENGTH_MISMATCH
;
1590 pkt
->u
.request
.stub_and_verifier
.length
-= trail_len
;
1593 return NT_STATUS_OK
;
1596 /****************************************************************************
1597 Processes a request pdu. This will do auth processing if needed, and
1598 appends the data into the complete stream if the LAST flag is not set.
1599 ****************************************************************************/
1601 static bool process_request_pdu(struct pipes_struct
*p
, struct ncacn_packet
*pkt
)
1606 if (!p
->pipe_bound
) {
1607 DEBUG(0,("process_request_pdu: rpc request with no bind.\n"));
1608 set_incoming_fault(p
);
1612 /* Store the opnum */
1613 p
->opnum
= pkt
->u
.request
.opnum
;
1615 status
= dcesrv_auth_request(&p
->auth
, pkt
, &p
->in_data
.pdu
);
1616 if (!NT_STATUS_IS_OK(status
)) {
1617 DEBUG(0, ("Failed to check packet auth. (%s)\n",
1618 nt_errstr(status
)));
1619 set_incoming_fault(p
);
1623 data
= pkt
->u
.request
.stub_and_verifier
;
1626 * Check the data length doesn't go over the 15Mb limit.
1627 * increased after observing a bug in the Windows NT 4.0 SP6a
1628 * spoolsv.exe when the response to a GETPRINTERDRIVER2 RPC
1629 * will not fit in the initial buffer of size 0x1068 --jerry 22/01/2002
1632 if (p
->in_data
.data
.length
+ data
.length
> MAX_RPC_DATA_SIZE
) {
1633 DEBUG(0, ("process_request_pdu: "
1634 "rpc data buffer too large (%u) + (%u)\n",
1635 (unsigned int)p
->in_data
.data
.length
,
1636 (unsigned int)data
.length
));
1637 set_incoming_fault(p
);
1642 * Append the data portion into the buffer and return.
1646 if (!data_blob_append(p
->mem_ctx
, &p
->in_data
.data
,
1647 data
.data
, data
.length
)) {
1648 DEBUG(0, ("Unable to append data size %u "
1649 "to parse buffer of size %u.\n",
1650 (unsigned int)data
.length
,
1651 (unsigned int)p
->in_data
.data
.length
));
1652 set_incoming_fault(p
);
1657 if (pkt
->pfc_flags
& DCERPC_PFC_FLAG_LAST
) {
1660 * Ok - we finally have a complete RPC stream.
1661 * Call the rpc command to process it.
1665 * Process the complete data stream here.
1667 if (pipe_init_outgoing_data(p
)) {
1668 ret
= api_pipe_request(p
, pkt
);
1677 /****************************************************************************
1678 Processes a finished PDU stored in p->in_data.pdu.
1679 ****************************************************************************/
1681 void process_complete_pdu(struct pipes_struct
*p
)
1683 struct ncacn_packet
*pkt
= NULL
;
1687 if(p
->fault_state
) {
1688 DEBUG(10,("RPC connection in fault state.\n"));
1692 pkt
= talloc(p
->mem_ctx
, struct ncacn_packet
);
1694 DEBUG(0, ("Out of memory!\n"));
1699 * Ensure we're using the corrent endianness for both the
1700 * RPC header flags and the raw data we will be reading from.
1702 if (dcerpc_get_endian_flag(&p
->in_data
.pdu
) & DCERPC_DREP_LE
) {
1703 p
->endian
= RPC_LITTLE_ENDIAN
;
1705 p
->endian
= RPC_BIG_ENDIAN
;
1707 DEBUG(10, ("PDU is in %s Endian format!\n", p
->endian
?"Big":"Little"));
1709 status
= dcerpc_pull_ncacn_packet(pkt
, &p
->in_data
.pdu
,
1711 if (!NT_STATUS_IS_OK(status
)) {
1712 DEBUG(0, ("Failed to unmarshal rpc packet: %s!\n",
1713 nt_errstr(status
)));
1717 /* Store the call_id */
1718 p
->call_id
= pkt
->call_id
;
1720 DEBUG(10, ("Processing packet type %u\n", (unsigned int)pkt
->ptype
));
1722 switch (pkt
->ptype
) {
1723 case DCERPC_PKT_REQUEST
:
1724 reply
= process_request_pdu(p
, pkt
);
1727 case DCERPC_PKT_PING
: /* CL request - ignore... */
1728 DEBUG(0, ("Error - Connectionless packet type %u received\n",
1729 (unsigned int)pkt
->ptype
));
1732 case DCERPC_PKT_RESPONSE
: /* No responses here. */
1733 DEBUG(0, ("Error - DCERPC_PKT_RESPONSE received from client"));
1736 case DCERPC_PKT_FAULT
:
1737 case DCERPC_PKT_WORKING
:
1738 /* CL request - reply to a ping when a call in process. */
1739 case DCERPC_PKT_NOCALL
:
1740 /* CL - server reply to a ping call. */
1741 case DCERPC_PKT_REJECT
:
1742 case DCERPC_PKT_ACK
:
1743 case DCERPC_PKT_CL_CANCEL
:
1744 case DCERPC_PKT_FACK
:
1745 case DCERPC_PKT_CANCEL_ACK
:
1746 DEBUG(0, ("Error - Connectionless packet type %u received\n",
1747 (unsigned int)pkt
->ptype
));
1750 case DCERPC_PKT_BIND
:
1752 * We assume that a pipe bind is only in one pdu.
1754 if (pipe_init_outgoing_data(p
)) {
1755 reply
= api_pipe_bind_req(p
, pkt
);
1759 case DCERPC_PKT_BIND_ACK
:
1760 case DCERPC_PKT_BIND_NAK
:
1761 DEBUG(0, ("Error - DCERPC_PKT_BINDACK/DCERPC_PKT_BINDNACK "
1762 "packet type %u received.\n",
1763 (unsigned int)pkt
->ptype
));
1767 case DCERPC_PKT_ALTER
:
1769 * We assume that a pipe bind is only in one pdu.
1771 if (pipe_init_outgoing_data(p
)) {
1772 reply
= api_pipe_alter_context(p
, pkt
);
1776 case DCERPC_PKT_ALTER_RESP
:
1777 DEBUG(0, ("Error - DCERPC_PKT_ALTER_RESP received: "
1778 "Should only be server -> client.\n"));
1781 case DCERPC_PKT_AUTH3
:
1783 * The third packet in an auth exchange.
1785 if (pipe_init_outgoing_data(p
)) {
1786 reply
= api_pipe_bind_auth3(p
, pkt
);
1790 case DCERPC_PKT_SHUTDOWN
:
1791 DEBUG(0, ("Error - DCERPC_PKT_SHUTDOWN received: "
1792 "Should only be server -> client.\n"));
1795 case DCERPC_PKT_CO_CANCEL
:
1796 /* For now just free all client data and continue
1798 DEBUG(3,("process_complete_pdu: DCERPC_PKT_CO_CANCEL."
1799 " Abandoning rpc call.\n"));
1800 /* As we never do asynchronous RPC serving, we can
1801 * never cancel a call (as far as I know).
1802 * If we ever did we'd have to send a cancel_ack reply.
1803 * For now, just free all client data and continue
1809 /* Enable this if we're doing async rpc. */
1810 /* We must check the outstanding callid matches. */
1811 if (pipe_init_outgoing_data(p
)) {
1812 /* Send a cancel_ack PDU reply. */
1813 /* We should probably check the auth-verifier here. */
1814 reply
= setup_cancel_ack_reply(p
, pkt
);
1819 case DCERPC_PKT_ORPHANED
:
1820 /* We should probably check the auth-verifier here.
1821 * For now just free all client data and continue
1823 DEBUG(3, ("process_complete_pdu: DCERPC_PKT_ORPHANED."
1824 " Abandoning rpc call.\n"));
1829 DEBUG(0, ("process_complete_pdu: "
1830 "Unknown rpc type = %u received.\n",
1831 (unsigned int)pkt
->ptype
));
1837 DEBUG(3,("DCE/RPC fault sent!"));
1838 set_incoming_fault(p
);
1839 setup_fault_pdu(p
, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR
));
1843 * Reset the lengths. We're ready for a new pdu.
1845 TALLOC_FREE(p
->in_data
.pdu
.data
);
1846 p
->in_data
.pdu_needed_len
= 0;
1847 p
->in_data
.pdu
.length
= 0;