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 "srv_pipe_internal.h"
32 #include "../librpc/gen_ndr/ndr_schannel.h"
33 #include "../libcli/auth/schannel.h"
34 #include "../libcli/auth/spnego.h"
35 #include "dcesrv_ntlmssp.h"
36 #include "dcesrv_gssapi.h"
37 #include "dcesrv_spnego.h"
38 #include "rpc_server.h"
42 #define DBGC_CLASS DBGC_RPC_SRV
45 * Dump everything from the start of the end up of the provided data
46 * into a file, but only at debug level >= 50
48 static void dump_pdu_region(const char *name
, int v
,
49 DATA_BLOB
*data
, size_t start
, size_t end
)
55 if (DEBUGLEVEL
< 50) return;
57 if (start
> data
->length
|| end
> data
->length
|| start
> end
) return;
59 for (i
= 1; i
< 100; i
++) {
61 fname
= talloc_asprintf(talloc_tos(),
65 fname
= talloc_asprintf(talloc_tos(),
72 fd
= open(fname
, O_WRONLY
|O_CREAT
|O_EXCL
, 0644);
73 if (fd
!= -1 || errno
!= EEXIST
) break;
76 sz
= write(fd
, data
->data
+ start
, end
- start
);
78 if ((sz
!= end
- start
) || (i
!= 0) ) {
79 DEBUG(0, ("Error writing/closing %s: %ld!=%ld %d\n",
80 fname
, (unsigned long)sz
,
81 (unsigned long)end
- start
, i
));
83 DEBUG(0,("created %s\n", fname
));
89 static DATA_BLOB
generic_session_key(void)
91 return data_blob_const("SystemLibraryDTC", 16);
94 /*******************************************************************
95 Generate the next PDU to be returned from the data.
96 ********************************************************************/
98 static NTSTATUS
create_next_packet(TALLOC_CTX
*mem_ctx
,
99 struct pipe_auth_data
*auth
,
102 size_t data_sent_length
,
106 union dcerpc_payload u
;
115 ZERO_STRUCT(u
.response
);
117 /* Set up rpc packet pfc flags. */
118 if (data_sent_length
== 0) {
119 pfc_flags
= DCERPC_PFC_FLAG_FIRST
;
124 /* Work out how much we can fit in a single PDU. */
125 data_left
= rdata
->length
- data_sent_length
;
127 /* Ensure there really is data left to send. */
129 DEBUG(0, ("No data left to send !\n"));
130 return NT_STATUS_BUFFER_TOO_SMALL
;
133 status
= dcerpc_guess_sizes(auth
,
134 DCERPC_RESPONSE_LENGTH
,
136 RPC_MAX_PDU_FRAG_LEN
,
137 SERVER_NDR_PADDING_SIZE
,
138 &data_to_send
, &frag_len
,
139 &auth_len
, &pad_len
);
140 if (!NT_STATUS_IS_OK(status
)) {
144 /* Set up the alloc hint. This should be the data left to send. */
145 u
.response
.alloc_hint
= data_left
;
147 /* Work out if this PDU will be the last. */
148 if (data_sent_length
+ data_to_send
>= rdata
->length
) {
149 pfc_flags
|= DCERPC_PFC_FLAG_LAST
;
152 /* Prepare data to be NDR encoded. */
153 u
.response
.stub_and_verifier
=
154 data_blob_const(rdata
->data
+ data_sent_length
, data_to_send
);
156 /* Store the packet in the data stream. */
157 status
= dcerpc_push_ncacn_packet(mem_ctx
, DCERPC_PKT_RESPONSE
,
158 pfc_flags
, auth_len
, call_id
,
160 if (!NT_STATUS_IS_OK(status
)) {
161 DEBUG(0, ("Failed to marshall RPC Packet.\n"));
166 /* Set the proper length on the pdu, including padding.
167 * Only needed if an auth trailer will be appended. */
168 dcerpc_set_frag_length(frag
, frag
->length
170 + DCERPC_AUTH_TRAILER_LENGTH
175 status
= dcerpc_add_auth_footer(auth
, pad_len
, frag
);
176 if (!NT_STATUS_IS_OK(status
)) {
177 data_blob_free(frag
);
182 *pdu_size
= data_to_send
;
186 /*******************************************************************
187 Generate the next PDU to be returned from the data in p->rdata.
188 ********************************************************************/
190 bool create_next_pdu(struct pipes_struct
*p
)
196 * If we're in the fault state, keep returning fault PDU's until
197 * the pipe gets closed. JRA.
199 if (p
->fault_state
) {
200 setup_fault_pdu(p
, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR
));
204 status
= create_next_packet(p
->mem_ctx
, &p
->auth
,
205 p
->call_id
, &p
->out_data
.rdata
,
206 p
->out_data
.data_sent_length
,
207 &p
->out_data
.frag
, &pdu_size
);
208 if (!NT_STATUS_IS_OK(status
)) {
209 DEBUG(0, ("Failed to create packet with error %s, "
210 "(auth level %u / type %u)\n",
212 (unsigned int)p
->auth
.auth_level
,
213 (unsigned int)p
->auth
.auth_type
));
217 /* Setup the counts for this PDU. */
218 p
->out_data
.data_sent_length
+= pdu_size
;
219 p
->out_data
.current_pdu_sent
= 0;
224 static bool pipe_init_outgoing_data(struct pipes_struct
*p
);
226 /*******************************************************************
227 Marshall a bind_nak pdu.
228 *******************************************************************/
230 static bool setup_bind_nak(struct pipes_struct
*p
, struct ncacn_packet
*pkt
)
233 union dcerpc_payload u
;
235 /* Free any memory in the current return data buffer. */
236 pipe_init_outgoing_data(p
);
239 * Initialize a bind_nak header.
244 u
.bind_nak
.reject_reason
= 0;
247 * Marshall directly into the outgoing PDU space. We
248 * must do this as we need to set to the bind response
249 * header and are never sending more than one PDU here.
252 status
= dcerpc_push_ncacn_packet(p
->mem_ctx
,
254 DCERPC_PFC_FLAG_FIRST
|
255 DCERPC_PFC_FLAG_LAST
,
260 if (!NT_STATUS_IS_OK(status
)) {
264 p
->out_data
.data_sent_length
= 0;
265 p
->out_data
.current_pdu_sent
= 0;
267 TALLOC_FREE(p
->auth
.auth_ctx
);
268 p
->auth
.auth_level
= DCERPC_AUTH_LEVEL_NONE
;
269 p
->auth
.auth_type
= DCERPC_AUTH_TYPE_NONE
;
270 p
->pipe_bound
= False
;
275 /*******************************************************************
276 Marshall a fault pdu.
277 *******************************************************************/
279 bool setup_fault_pdu(struct pipes_struct
*p
, NTSTATUS fault_status
)
282 union dcerpc_payload u
;
284 /* Free any memory in the current return data buffer. */
285 pipe_init_outgoing_data(p
);
288 * Initialize a fault header.
293 u
.fault
.status
= NT_STATUS_V(fault_status
);
294 u
.fault
._pad
= data_blob_talloc_zero(p
->mem_ctx
, 4);
297 * Marshall directly into the outgoing PDU space. We
298 * must do this as we need to set to the bind response
299 * header and are never sending more than one PDU here.
302 status
= dcerpc_push_ncacn_packet(p
->mem_ctx
,
304 DCERPC_PFC_FLAG_FIRST
|
305 DCERPC_PFC_FLAG_LAST
|
306 DCERPC_PFC_FLAG_DID_NOT_EXECUTE
,
311 if (!NT_STATUS_IS_OK(status
)) {
315 p
->out_data
.data_sent_length
= 0;
316 p
->out_data
.current_pdu_sent
= 0;
321 /*******************************************************************
322 Ensure a bind request has the correct abstract & transfer interface.
323 Used to reject unknown binds from Win2k.
324 *******************************************************************/
326 static bool check_bind_req(struct pipes_struct
*p
,
327 struct ndr_syntax_id
* abstract
,
328 struct ndr_syntax_id
* transfer
,
331 struct pipe_rpc_fns
*context_fns
;
333 DEBUG(3,("check_bind_req for %s\n",
334 get_pipe_name_from_syntax(talloc_tos(), &p
->syntax
)));
336 /* we have to check all now since win2k introduced a new UUID on the lsaprpc pipe */
337 if (rpc_srv_pipe_exists_by_id(abstract
) &&
338 ndr_syntax_id_equal(transfer
, &ndr_transfer_syntax
)) {
339 DEBUG(3, ("check_bind_req: \\PIPE\\%s -> \\PIPE\\%s\n",
340 rpc_srv_get_pipe_cli_name(abstract
),
341 rpc_srv_get_pipe_srv_name(abstract
)));
346 context_fns
= SMB_MALLOC_P(struct pipe_rpc_fns
);
347 if (context_fns
== NULL
) {
348 DEBUG(0,("check_bind_req: malloc() failed!\n"));
352 context_fns
->next
= context_fns
->prev
= NULL
;
353 context_fns
->n_cmds
= rpc_srv_get_pipe_num_cmds(abstract
);
354 context_fns
->cmds
= rpc_srv_get_pipe_cmds(abstract
);
355 context_fns
->context_id
= context_id
;
357 /* add to the list of open contexts */
359 DLIST_ADD( p
->contexts
, context_fns
);
365 * Is a named pipe known?
366 * @param[in] cli_filename The pipe name requested by the client
367 * @result Do we want to serve this?
369 bool is_known_pipename(const char *cli_filename
, struct ndr_syntax_id
*syntax
)
371 const char *pipename
= cli_filename
;
374 if (strnequal(pipename
, "\\PIPE\\", 6)) {
378 if (*pipename
== '\\') {
382 if (lp_disable_spoolss() && strequal(pipename
, "spoolss")) {
383 DEBUG(10, ("refusing spoolss access\n"));
387 if (rpc_srv_get_pipe_interface_by_cli_name(pipename
, syntax
)) {
391 status
= smb_probe_module("rpc", pipename
);
392 if (!NT_STATUS_IS_OK(status
)) {
393 DEBUG(10, ("is_known_pipename: %s unknown\n", cli_filename
));
396 DEBUG(10, ("is_known_pipename: %s loaded dynamically\n", pipename
));
399 * Scan the list again for the interface id
401 if (rpc_srv_get_pipe_interface_by_cli_name(pipename
, syntax
)) {
405 DEBUG(10, ("is_known_pipename: pipe %s did not register itself!\n",
411 /*******************************************************************
412 Handle the first part of a SPNEGO bind auth.
413 *******************************************************************/
415 static bool pipe_spnego_auth_bind(struct pipes_struct
*p
,
417 struct dcerpc_auth
*auth_info
,
420 struct spnego_context
*spnego_ctx
;
423 status
= spnego_server_auth_start(p
,
424 (auth_info
->auth_level
==
425 DCERPC_AUTH_LEVEL_INTEGRITY
),
426 (auth_info
->auth_level
==
427 DCERPC_AUTH_LEVEL_PRIVACY
),
429 &auth_info
->credentials
,
432 if (!NT_STATUS_IS_OK(status
)) {
433 DEBUG(0, ("Failed SPNEGO negotiate (%s)\n",
438 /* Make sure data is bound to the memctx, to be freed the caller */
439 talloc_steal(mem_ctx
, response
->data
);
441 p
->auth
.auth_ctx
= spnego_ctx
;
442 p
->auth
.auth_type
= DCERPC_AUTH_TYPE_SPNEGO
;
444 DEBUG(10, ("SPNEGO auth started\n"));
449 /*******************************************************************
450 Handle an schannel bind auth.
451 *******************************************************************/
453 static bool pipe_schannel_auth_bind(struct pipes_struct
*p
,
455 struct dcerpc_auth
*auth_info
,
458 struct NL_AUTH_MESSAGE neg
;
459 struct NL_AUTH_MESSAGE reply
;
462 struct netlogon_creds_CredentialState
*creds
;
463 enum ndr_err_code ndr_err
;
464 struct schannel_state
*schannel_auth
;
466 ndr_err
= ndr_pull_struct_blob(
467 &auth_info
->credentials
, mem_ctx
, &neg
,
468 (ndr_pull_flags_fn_t
)ndr_pull_NL_AUTH_MESSAGE
);
469 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
470 DEBUG(0,("pipe_schannel_auth_bind: Could not unmarshal SCHANNEL auth neg\n"));
474 if (DEBUGLEVEL
>= 10) {
475 NDR_PRINT_DEBUG(NL_AUTH_MESSAGE
, &neg
);
478 if (!(neg
.Flags
& NL_FLAG_OEM_NETBIOS_COMPUTER_NAME
)) {
479 DEBUG(0,("pipe_schannel_auth_bind: Did not receive netbios computer name\n"));
484 * The neg.oem_netbios_computer.a key here must match the remote computer name
485 * given in the DOM_CLNT_SRV.uni_comp_name used on all netlogon pipe
486 * operations that use credentials.
490 status
= schannel_get_creds_state(p
, lp_private_dir(),
491 neg
.oem_netbios_computer
.a
, &creds
);
494 if (!NT_STATUS_IS_OK(status
)) {
495 DEBUG(0, ("pipe_schannel_auth_bind: Attempt to bind using schannel without successful serverauth2\n"));
499 schannel_auth
= talloc(p
, struct schannel_state
);
500 if (!schannel_auth
) {
505 schannel_auth
->state
= SCHANNEL_STATE_START
;
506 schannel_auth
->seq_num
= 0;
507 schannel_auth
->initiator
= false;
508 schannel_auth
->creds
= creds
;
511 * JRA. Should we also copy the schannel session key into the pipe session key p->session_key
512 * here ? We do that for NTLMSSP, but the session key is already set up from the vuser
513 * struct of the person who opened the pipe. I need to test this further. JRA.
515 * VL. As we are mapping this to guest set the generic key
516 * "SystemLibraryDTC" key here. It's a bit difficult to test against
517 * W2k3, as it does not allow schannel binds against SAMR and LSA
521 ret
= session_info_set_session_key(p
->session_info
, generic_session_key());
524 DEBUG(0, ("session_info_set_session_key failed\n"));
528 /*** SCHANNEL verifier ***/
530 reply
.MessageType
= NL_NEGOTIATE_RESPONSE
;
532 reply
.Buffer
.dummy
= 5; /* ??? actually I don't think
533 * this has any meaning
536 ndr_err
= ndr_push_struct_blob(response
, mem_ctx
, &reply
,
537 (ndr_push_flags_fn_t
)ndr_push_NL_AUTH_MESSAGE
);
538 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
539 DEBUG(0,("Failed to marshall NL_AUTH_MESSAGE.\n"));
543 if (DEBUGLEVEL
>= 10) {
544 NDR_PRINT_DEBUG(NL_AUTH_MESSAGE
, &reply
);
547 DEBUG(10,("pipe_schannel_auth_bind: schannel auth: domain [%s] myname [%s]\n",
548 neg
.oem_netbios_domain
.a
, neg
.oem_netbios_computer
.a
));
550 /* We're finished with this bind - no more packets. */
551 p
->auth
.auth_ctx
= schannel_auth
;
552 p
->auth
.auth_type
= DCERPC_AUTH_TYPE_SCHANNEL
;
554 p
->pipe_bound
= True
;
559 /*******************************************************************
560 Handle an NTLMSSP bind auth.
561 *******************************************************************/
563 static bool pipe_ntlmssp_auth_bind(struct pipes_struct
*p
,
565 struct dcerpc_auth
*auth_info
,
568 struct auth_ntlmssp_state
*ntlmssp_state
= NULL
;
571 if (strncmp((char *)auth_info
->credentials
.data
, "NTLMSSP", 7) != 0) {
572 DEBUG(0, ("Failed to read NTLMSSP in blob\n"));
576 /* We have an NTLMSSP blob. */
577 status
= ntlmssp_server_auth_start(p
,
578 (auth_info
->auth_level
==
579 DCERPC_AUTH_LEVEL_INTEGRITY
),
580 (auth_info
->auth_level
==
581 DCERPC_AUTH_LEVEL_PRIVACY
),
583 &auth_info
->credentials
,
586 if (!NT_STATUS_EQUAL(status
, NT_STATUS_OK
)) {
587 DEBUG(0, (__location__
": auth_ntlmssp_start failed: %s\n",
592 /* Make sure data is bound to the memctx, to be freed the caller */
593 talloc_steal(mem_ctx
, response
->data
);
595 p
->auth
.auth_ctx
= ntlmssp_state
;
596 p
->auth
.auth_type
= DCERPC_AUTH_TYPE_NTLMSSP
;
598 DEBUG(10, (__location__
": NTLMSSP auth started\n"));
603 /*******************************************************************
604 Process an NTLMSSP authentication response.
605 If this function succeeds, the user has been authenticated
606 and their domain, name and calling workstation stored in
608 *******************************************************************/
610 static bool pipe_ntlmssp_verify_final(TALLOC_CTX
*mem_ctx
,
611 struct auth_ntlmssp_state
*ntlmssp_ctx
,
612 enum dcerpc_AuthLevel auth_level
,
613 struct client_address
*client_id
,
614 struct ndr_syntax_id
*syntax
,
615 struct auth_serversupplied_info
**session_info
)
620 DEBUG(5, (__location__
": pipe %s checking user details\n",
621 get_pipe_name_from_syntax(talloc_tos(), syntax
)));
623 /* Finally - if the pipe negotiated integrity (sign) or privacy (seal)
624 ensure the underlying NTLMSSP flags are also set. If not we should
627 status
= ntlmssp_server_check_flags(ntlmssp_ctx
,
629 DCERPC_AUTH_LEVEL_INTEGRITY
),
631 DCERPC_AUTH_LEVEL_PRIVACY
));
632 if (!NT_STATUS_IS_OK(status
)) {
633 DEBUG(0, (__location__
": Client failed to negotatie proper "
634 "security for pipe %s\n",
635 get_pipe_name_from_syntax(talloc_tos(), syntax
)));
639 TALLOC_FREE(*session_info
);
641 status
= ntlmssp_server_get_user_info(ntlmssp_ctx
,
642 mem_ctx
, session_info
);
643 if (!NT_STATUS_IS_OK(status
)) {
644 DEBUG(0, (__location__
": failed to obtain the server info "
645 "for authenticated user: %s\n", nt_errstr(status
)));
649 if ((*session_info
)->security_token
== NULL
) {
650 DEBUG(1, ("Auth module failed to provide nt_user_token\n"));
655 * We're an authenticated bind over smb, so the session key needs to
656 * be set to "SystemLibraryDTC". Weird, but this is what Windows
657 * does. See the RPC-SAMBA3SESSIONKEY.
660 ret
= session_info_set_session_key((*session_info
), generic_session_key());
662 DEBUG(0, ("Failed to set session key!\n"));
669 /*******************************************************************
670 Handle a GSSAPI bind auth.
671 *******************************************************************/
673 static bool pipe_gssapi_auth_bind(struct pipes_struct
*p
,
675 struct dcerpc_auth
*auth_info
,
679 struct gse_context
*gse_ctx
= NULL
;
681 status
= gssapi_server_auth_start(p
,
682 (auth_info
->auth_level
==
683 DCERPC_AUTH_LEVEL_INTEGRITY
),
684 (auth_info
->auth_level
==
685 DCERPC_AUTH_LEVEL_PRIVACY
),
687 &auth_info
->credentials
,
690 if (!NT_STATUS_IS_OK(status
)) {
691 DEBUG(0, ("Failed to init dcerpc gssapi server (%s)\n",
696 /* Make sure data is bound to the memctx, to be freed the caller */
697 talloc_steal(mem_ctx
, response
->data
);
699 p
->auth
.auth_ctx
= gse_ctx
;
700 p
->auth
.auth_type
= DCERPC_AUTH_TYPE_KRB5
;
702 DEBUG(10, ("KRB5 auth started\n"));
707 TALLOC_FREE(gse_ctx
);
711 static NTSTATUS
pipe_gssapi_verify_final(TALLOC_CTX
*mem_ctx
,
712 struct gse_context
*gse_ctx
,
713 struct client_address
*client_id
,
714 struct auth_serversupplied_info
**session_info
)
719 /* Finally - if the pipe negotiated integrity (sign) or privacy (seal)
720 ensure the underlying flags are also set. If not we should
723 status
= gssapi_server_check_flags(gse_ctx
);
724 if (!NT_STATUS_IS_OK(status
)) {
725 DEBUG(0, ("Requested Security Layers not honored!\n"));
729 status
= gssapi_server_get_user_info(gse_ctx
, mem_ctx
,
730 client_id
, session_info
);
731 if (!NT_STATUS_IS_OK(status
)) {
732 DEBUG(0, (__location__
": failed to obtain the server info "
733 "for authenticated user: %s\n", nt_errstr(status
)));
737 if ((*session_info
)->security_token
== NULL
) {
738 status
= create_local_token(*session_info
);
739 if (!NT_STATUS_IS_OK(status
)) {
740 DEBUG(1, ("Failed to create local user token (%s)\n",
742 status
= NT_STATUS_ACCESS_DENIED
;
747 /* TODO: this is what the ntlmssp code does with the session_key, check
748 * it is ok with gssapi too */
750 * We're an authenticated bind over smb, so the session key needs to
751 * be set to "SystemLibraryDTC". Weird, but this is what Windows
752 * does. See the RPC-SAMBA3SESSIONKEY.
755 bret
= session_info_set_session_key((*session_info
), generic_session_key());
757 return NT_STATUS_ACCESS_DENIED
;
763 static NTSTATUS
pipe_auth_verify_final(struct pipes_struct
*p
)
765 enum spnego_mech auth_type
;
766 struct auth_ntlmssp_state
*ntlmssp_ctx
;
767 struct spnego_context
*spnego_ctx
;
768 struct gse_context
*gse_ctx
;
772 switch (p
->auth
.auth_type
) {
773 case DCERPC_AUTH_TYPE_NTLMSSP
:
774 ntlmssp_ctx
= talloc_get_type_abort(p
->auth
.auth_ctx
,
775 struct auth_ntlmssp_state
);
776 if (!pipe_ntlmssp_verify_final(p
, ntlmssp_ctx
,
778 p
->client_id
, &p
->syntax
,
780 return NT_STATUS_ACCESS_DENIED
;
783 case DCERPC_AUTH_TYPE_KRB5
:
784 gse_ctx
= talloc_get_type_abort(p
->auth
.auth_ctx
,
786 status
= pipe_gssapi_verify_final(p
, gse_ctx
,
789 if (!NT_STATUS_IS_OK(status
)) {
790 DEBUG(1, ("gssapi bind failed with: %s",
795 case DCERPC_AUTH_TYPE_SPNEGO
:
796 spnego_ctx
= talloc_get_type_abort(p
->auth
.auth_ctx
,
797 struct spnego_context
);
798 status
= spnego_get_negotiated_mech(spnego_ctx
,
799 &auth_type
, &mech_ctx
);
800 if (!NT_STATUS_IS_OK(status
)) {
801 DEBUG(0, ("Bad SPNEGO state (%s)\n",
807 gse_ctx
= talloc_get_type_abort(mech_ctx
,
809 status
= pipe_gssapi_verify_final(p
, gse_ctx
,
812 if (!NT_STATUS_IS_OK(status
)) {
813 DEBUG(1, ("gssapi bind failed with: %s",
819 ntlmssp_ctx
= talloc_get_type_abort(mech_ctx
,
820 struct auth_ntlmssp_state
);
821 if (!pipe_ntlmssp_verify_final(p
, ntlmssp_ctx
,
826 return NT_STATUS_ACCESS_DENIED
;
830 DEBUG(0, (__location__
": incorrect spnego type "
831 "(%d).\n", auth_type
));
832 return NT_STATUS_ACCESS_DENIED
;
836 DEBUG(0, (__location__
": incorrect auth type (%u).\n",
837 (unsigned int)p
->auth
.auth_type
));
838 return NT_STATUS_ACCESS_DENIED
;
841 p
->pipe_bound
= true;
846 /*******************************************************************
847 Respond to a pipe bind request.
848 *******************************************************************/
850 static bool api_pipe_bind_req(struct pipes_struct
*p
,
851 struct ncacn_packet
*pkt
)
853 struct dcerpc_auth auth_info
;
855 unsigned int auth_type
= DCERPC_AUTH_TYPE_NONE
;
857 struct ndr_syntax_id id
;
858 union dcerpc_payload u
;
859 struct dcerpc_ack_ctx bind_ack_ctx
;
860 DATA_BLOB auth_resp
= data_blob_null
;
861 DATA_BLOB auth_blob
= data_blob_null
;
863 /* No rebinds on a bound pipe - use alter context. */
865 DEBUG(2,("api_pipe_bind_req: rejecting bind request on bound "
867 get_pipe_name_from_syntax(talloc_tos(), &p
->syntax
)));
868 return setup_bind_nak(p
, pkt
);
871 if (pkt
->u
.bind
.num_contexts
== 0) {
872 DEBUG(0, ("api_pipe_bind_req: no rpc contexts around\n"));
877 * Try and find the correct pipe name to ensure
878 * that this is a pipe name we support.
880 id
= pkt
->u
.bind
.ctx_list
[0].abstract_syntax
;
881 if (rpc_srv_pipe_exists_by_id(&id
)) {
882 DEBUG(3, ("api_pipe_bind_req: \\PIPE\\%s -> \\PIPE\\%s\n",
883 rpc_srv_get_pipe_cli_name(&id
),
884 rpc_srv_get_pipe_srv_name(&id
)));
886 status
= smb_probe_module(
887 "rpc", get_pipe_name_from_syntax(
889 &pkt
->u
.bind
.ctx_list
[0].abstract_syntax
));
891 if (NT_STATUS_IS_ERR(status
)) {
892 DEBUG(3,("api_pipe_bind_req: Unknown pipe name %s in bind request.\n",
893 get_pipe_name_from_syntax(
895 &pkt
->u
.bind
.ctx_list
[0].abstract_syntax
)));
897 return setup_bind_nak(p
, pkt
);
900 if (rpc_srv_get_pipe_interface_by_cli_name(
901 get_pipe_name_from_syntax(talloc_tos(),
904 DEBUG(3, ("api_pipe_bind_req: \\PIPE\\%s -> \\PIPE\\%s\n",
905 rpc_srv_get_pipe_cli_name(&id
),
906 rpc_srv_get_pipe_srv_name(&id
)));
908 DEBUG(0, ("module %s doesn't provide functions for "
910 get_pipe_name_from_syntax(talloc_tos(),
912 get_pipe_name_from_syntax(talloc_tos(),
914 return setup_bind_nak(p
, pkt
);
918 DEBUG(5,("api_pipe_bind_req: make response. %d\n", __LINE__
));
920 if (pkt
->u
.bind
.assoc_group_id
!= 0) {
921 assoc_gid
= pkt
->u
.bind
.assoc_group_id
;
927 * Create the bind response struct.
930 /* If the requested abstract synt uuid doesn't match our client pipe,
931 reject the bind_ack & set the transfer interface synt to all 0's,
932 ver 0 (observed when NT5 attempts to bind to abstract interfaces
934 Needed when adding entries to a DACL from NT5 - SK */
936 if (check_bind_req(p
,
937 &pkt
->u
.bind
.ctx_list
[0].abstract_syntax
,
938 &pkt
->u
.bind
.ctx_list
[0].transfer_syntaxes
[0],
939 pkt
->u
.bind
.ctx_list
[0].context_id
)) {
941 bind_ack_ctx
.result
= 0;
942 bind_ack_ctx
.reason
= 0;
943 bind_ack_ctx
.syntax
= pkt
->u
.bind
.ctx_list
[0].transfer_syntaxes
[0];
945 p
->pipe_bound
= False
;
946 /* Rejection reason: abstract syntax not supported */
947 bind_ack_ctx
.result
= DCERPC_BIND_PROVIDER_REJECT
;
948 bind_ack_ctx
.reason
= DCERPC_BIND_REASON_ASYNTAX
;
949 bind_ack_ctx
.syntax
= null_ndr_syntax_id
;
953 * Check if this is an authenticated bind request.
955 if (pkt
->auth_length
) {
956 /* Quick length check. Won't catch a bad auth footer,
957 * prevents overrun. */
959 if (pkt
->frag_length
< RPC_HEADER_LEN
+
960 DCERPC_AUTH_TRAILER_LENGTH
+
962 DEBUG(0,("api_pipe_bind_req: auth_len (%u) "
963 "too long for fragment %u.\n",
964 (unsigned int)pkt
->auth_length
,
965 (unsigned int)pkt
->frag_length
));
970 * Decode the authentication verifier.
972 status
= dcerpc_pull_dcerpc_auth(pkt
,
973 &pkt
->u
.bind
.auth_info
,
974 &auth_info
, p
->endian
);
975 if (!NT_STATUS_IS_OK(status
)) {
976 DEBUG(0, ("Unable to unmarshall dcerpc_auth.\n"));
980 auth_type
= auth_info
.auth_type
;
982 /* Work out if we have to sign or seal etc. */
983 switch (auth_info
.auth_level
) {
984 case DCERPC_AUTH_LEVEL_INTEGRITY
:
985 p
->auth
.auth_level
= DCERPC_AUTH_LEVEL_INTEGRITY
;
987 case DCERPC_AUTH_LEVEL_PRIVACY
:
988 p
->auth
.auth_level
= DCERPC_AUTH_LEVEL_PRIVACY
;
990 case DCERPC_AUTH_LEVEL_NONE
:
991 p
->auth
.auth_level
= DCERPC_AUTH_LEVEL_NONE
;
994 DEBUG(0, ("Unexpected auth level (%u).\n",
995 (unsigned int)auth_info
.auth_level
));
1000 case DCERPC_AUTH_TYPE_NTLMSSP
:
1001 if (!pipe_ntlmssp_auth_bind(p
, pkt
,
1002 &auth_info
, &auth_resp
)) {
1008 case DCERPC_AUTH_TYPE_SCHANNEL
:
1009 if (!pipe_schannel_auth_bind(p
, pkt
,
1010 &auth_info
, &auth_resp
)) {
1015 case DCERPC_AUTH_TYPE_SPNEGO
:
1016 if (!pipe_spnego_auth_bind(p
, pkt
,
1017 &auth_info
, &auth_resp
)) {
1022 case DCERPC_AUTH_TYPE_KRB5
:
1023 if (!pipe_gssapi_auth_bind(p
, pkt
,
1024 &auth_info
, &auth_resp
)) {
1029 case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM
:
1030 if (p
->transport
== NCALRPC
&& p
->system_user
) {
1031 TALLOC_FREE(p
->session_info
);
1033 status
= make_session_info_system(p
,
1035 if (!NT_STATUS_IS_OK(status
)) {
1039 auth_resp
= data_blob_talloc(pkt
,
1043 p
->auth
.auth_type
= DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM
;
1044 p
->pipe_bound
= true;
1050 case DCERPC_AUTH_TYPE_NONE
:
1054 DEBUG(0, ("Unknown auth type %x requested.\n", auth_type
));
1059 if (auth_type
== DCERPC_AUTH_TYPE_NONE
) {
1060 /* Unauthenticated bind request. */
1061 /* We're finished - no more packets. */
1062 p
->auth
.auth_type
= DCERPC_AUTH_TYPE_NONE
;
1063 /* We must set the pipe auth_level here also. */
1064 p
->auth
.auth_level
= DCERPC_AUTH_LEVEL_NONE
;
1065 p
->pipe_bound
= True
;
1066 /* The session key was initialized from the SMB
1067 * session in make_internal_rpc_pipe_p */
1070 ZERO_STRUCT(u
.bind_ack
);
1071 u
.bind_ack
.max_xmit_frag
= RPC_MAX_PDU_FRAG_LEN
;
1072 u
.bind_ack
.max_recv_frag
= RPC_MAX_PDU_FRAG_LEN
;
1073 u
.bind_ack
.assoc_group_id
= assoc_gid
;
1075 /* name has to be \PIPE\xxxxx */
1076 u
.bind_ack
.secondary_address
=
1077 talloc_asprintf(pkt
, "\\PIPE\\%s",
1078 rpc_srv_get_pipe_srv_name(&id
));
1079 if (!u
.bind_ack
.secondary_address
) {
1080 DEBUG(0, ("Out of memory!\n"));
1083 u
.bind_ack
.secondary_address_size
=
1084 strlen(u
.bind_ack
.secondary_address
) + 1;
1086 u
.bind_ack
.num_results
= 1;
1087 u
.bind_ack
.ctx_list
= &bind_ack_ctx
;
1089 /* NOTE: We leave the auth_info empty so we can calculate the padding
1090 * later and then append the auth_info --simo */
1093 * Marshall directly into the outgoing PDU space. We
1094 * must do this as we need to set to the bind response
1095 * header and are never sending more than one PDU here.
1098 status
= dcerpc_push_ncacn_packet(p
->mem_ctx
,
1099 DCERPC_PKT_BIND_ACK
,
1100 DCERPC_PFC_FLAG_FIRST
|
1101 DCERPC_PFC_FLAG_LAST
,
1106 if (!NT_STATUS_IS_OK(status
)) {
1107 DEBUG(0, ("Failed to marshall bind_ack packet. (%s)\n",
1108 nt_errstr(status
)));
1111 if (auth_resp
.length
) {
1113 status
= dcerpc_push_dcerpc_auth(pkt
,
1115 auth_info
.auth_level
,
1117 1, /* auth_context_id */
1120 if (!NT_STATUS_IS_OK(status
)) {
1121 DEBUG(0, ("Marshalling of dcerpc_auth failed.\n"));
1126 /* Now that we have the auth len store it into the right place in
1127 * the dcerpc header */
1128 dcerpc_set_frag_length(&p
->out_data
.frag
,
1129 p
->out_data
.frag
.length
+ auth_blob
.length
);
1131 if (auth_blob
.length
) {
1133 if (!data_blob_append(p
->mem_ctx
, &p
->out_data
.frag
,
1134 auth_blob
.data
, auth_blob
.length
)) {
1135 DEBUG(0, ("Append of auth info failed.\n"));
1141 * Setup the lengths for the initial reply.
1144 p
->out_data
.data_sent_length
= 0;
1145 p
->out_data
.current_pdu_sent
= 0;
1147 TALLOC_FREE(auth_blob
.data
);
1152 data_blob_free(&p
->out_data
.frag
);
1153 TALLOC_FREE(auth_blob
.data
);
1154 return setup_bind_nak(p
, pkt
);
1157 /*******************************************************************
1158 This is the "stage3" response after a bind request and reply.
1159 *******************************************************************/
1161 bool api_pipe_bind_auth3(struct pipes_struct
*p
, struct ncacn_packet
*pkt
)
1163 struct dcerpc_auth auth_info
;
1164 DATA_BLOB response
= data_blob_null
;
1165 struct auth_ntlmssp_state
*ntlmssp_ctx
;
1166 struct spnego_context
*spnego_ctx
;
1167 struct gse_context
*gse_ctx
;
1170 DEBUG(5, ("api_pipe_bind_auth3: decode request. %d\n", __LINE__
));
1172 if (pkt
->auth_length
== 0) {
1173 DEBUG(0, ("No auth field sent for bind request!\n"));
1177 /* Ensure there's enough data for an authenticated request. */
1178 if (pkt
->frag_length
< RPC_HEADER_LEN
1179 + DCERPC_AUTH_TRAILER_LENGTH
1180 + pkt
->auth_length
) {
1181 DEBUG(0,("api_pipe_ntlmssp_auth_process: auth_len "
1182 "%u is too large.\n",
1183 (unsigned int)pkt
->auth_length
));
1188 * Decode the authentication verifier response.
1191 status
= dcerpc_pull_dcerpc_auth(pkt
,
1192 &pkt
->u
.auth3
.auth_info
,
1193 &auth_info
, p
->endian
);
1194 if (!NT_STATUS_IS_OK(status
)) {
1195 DEBUG(0, ("Failed to unmarshall dcerpc_auth.\n"));
1199 /* We must NEVER look at auth_info->auth_pad_len here,
1200 * as old Samba client code gets it wrong and sends it
1204 if (auth_info
.auth_type
!= p
->auth
.auth_type
) {
1205 DEBUG(0, ("Auth type mismatch! Client sent %d, "
1206 "but auth was started as type %d!\n",
1207 auth_info
.auth_type
, p
->auth
.auth_type
));
1211 switch (auth_info
.auth_type
) {
1212 case DCERPC_AUTH_TYPE_NTLMSSP
:
1213 ntlmssp_ctx
= talloc_get_type_abort(p
->auth
.auth_ctx
,
1214 struct auth_ntlmssp_state
);
1215 status
= ntlmssp_server_step(ntlmssp_ctx
,
1216 pkt
, &auth_info
.credentials
,
1219 case DCERPC_AUTH_TYPE_KRB5
:
1220 gse_ctx
= talloc_get_type_abort(p
->auth
.auth_ctx
,
1221 struct gse_context
);
1222 status
= gssapi_server_step(gse_ctx
,
1223 pkt
, &auth_info
.credentials
,
1226 case DCERPC_AUTH_TYPE_SPNEGO
:
1227 spnego_ctx
= talloc_get_type_abort(p
->auth
.auth_ctx
,
1228 struct spnego_context
);
1229 status
= spnego_server_step(spnego_ctx
,
1230 pkt
, &auth_info
.credentials
,
1234 DEBUG(0, (__location__
": incorrect auth type (%u).\n",
1235 (unsigned int)auth_info
.auth_type
));
1239 if (NT_STATUS_EQUAL(status
,
1240 NT_STATUS_MORE_PROCESSING_REQUIRED
) ||
1242 DEBUG(0, (__location__
": This was supposed to be the final "
1243 "leg, but crypto machinery claims a response is "
1244 "needed, aborting auth!\n"));
1245 data_blob_free(&response
);
1248 if (!NT_STATUS_IS_OK(status
)) {
1249 DEBUG(0, ("Auth failed (%s)\n", nt_errstr(status
)));
1253 /* Now verify auth was indeed successful and extract server info */
1254 status
= pipe_auth_verify_final(p
);
1255 if (!NT_STATUS_IS_OK(status
)) {
1256 DEBUG(0, ("Auth Verify failed (%s)\n", nt_errstr(status
)));
1264 TALLOC_FREE(p
->auth
.auth_ctx
);
1268 /****************************************************************************
1269 Deal with an alter context call. Can be third part of 3 leg auth request for
1271 ****************************************************************************/
1273 static bool api_pipe_alter_context(struct pipes_struct
*p
,
1274 struct ncacn_packet
*pkt
)
1276 struct dcerpc_auth auth_info
;
1279 union dcerpc_payload u
;
1280 struct dcerpc_ack_ctx bind_ack_ctx
;
1281 DATA_BLOB auth_resp
= data_blob_null
;
1282 DATA_BLOB auth_blob
= data_blob_null
;
1284 struct auth_ntlmssp_state
*ntlmssp_ctx
;
1285 struct spnego_context
*spnego_ctx
;
1286 struct gse_context
*gse_ctx
;
1288 DEBUG(5,("api_pipe_alter_context: make response. %d\n", __LINE__
));
1290 if (pkt
->u
.bind
.assoc_group_id
!= 0) {
1291 assoc_gid
= pkt
->u
.bind
.assoc_group_id
;
1297 * Create the bind response struct.
1300 /* If the requested abstract synt uuid doesn't match our client pipe,
1301 reject the bind_ack & set the transfer interface synt to all 0's,
1302 ver 0 (observed when NT5 attempts to bind to abstract interfaces
1304 Needed when adding entries to a DACL from NT5 - SK */
1306 if (check_bind_req(p
,
1307 &pkt
->u
.bind
.ctx_list
[0].abstract_syntax
,
1308 &pkt
->u
.bind
.ctx_list
[0].transfer_syntaxes
[0],
1309 pkt
->u
.bind
.ctx_list
[0].context_id
)) {
1311 bind_ack_ctx
.result
= 0;
1312 bind_ack_ctx
.reason
= 0;
1313 bind_ack_ctx
.syntax
= pkt
->u
.bind
.ctx_list
[0].transfer_syntaxes
[0];
1315 p
->pipe_bound
= False
;
1316 /* Rejection reason: abstract syntax not supported */
1317 bind_ack_ctx
.result
= DCERPC_BIND_PROVIDER_REJECT
;
1318 bind_ack_ctx
.reason
= DCERPC_BIND_REASON_ASYNTAX
;
1319 bind_ack_ctx
.syntax
= null_ndr_syntax_id
;
1323 * Check if this is an authenticated alter context request.
1325 if (pkt
->auth_length
) {
1326 /* Quick length check. Won't catch a bad auth footer,
1327 * prevents overrun. */
1329 if (pkt
->frag_length
< RPC_HEADER_LEN
+
1330 DCERPC_AUTH_TRAILER_LENGTH
+
1332 DEBUG(0,("api_pipe_alter_context: auth_len (%u) "
1333 "too long for fragment %u.\n",
1334 (unsigned int)pkt
->auth_length
,
1335 (unsigned int)pkt
->frag_length
));
1339 status
= dcerpc_pull_dcerpc_auth(pkt
,
1340 &pkt
->u
.bind
.auth_info
,
1341 &auth_info
, p
->endian
);
1342 if (!NT_STATUS_IS_OK(status
)) {
1343 DEBUG(0, ("Unable to unmarshall dcerpc_auth.\n"));
1347 /* We can only finish if the pipe is unbound for now */
1348 if (p
->pipe_bound
) {
1349 DEBUG(0, (__location__
": Pipe already bound, "
1350 "Altering Context not yet supported!\n"));
1354 if (auth_info
.auth_type
!= p
->auth
.auth_type
) {
1355 DEBUG(0, ("Auth type mismatch! Client sent %d, "
1356 "but auth was started as type %d!\n",
1357 auth_info
.auth_type
, p
->auth
.auth_type
));
1362 switch (auth_info
.auth_type
) {
1363 case DCERPC_AUTH_TYPE_SPNEGO
:
1364 spnego_ctx
= talloc_get_type_abort(p
->auth
.auth_ctx
,
1365 struct spnego_context
);
1366 status
= spnego_server_step(spnego_ctx
,
1368 &auth_info
.credentials
,
1372 case DCERPC_AUTH_TYPE_KRB5
:
1373 gse_ctx
= talloc_get_type_abort(p
->auth
.auth_ctx
,
1374 struct gse_context
);
1375 status
= gssapi_server_step(gse_ctx
,
1377 &auth_info
.credentials
,
1380 case DCERPC_AUTH_TYPE_NTLMSSP
:
1381 ntlmssp_ctx
= talloc_get_type_abort(p
->auth
.auth_ctx
,
1382 struct auth_ntlmssp_state
);
1383 status
= ntlmssp_server_step(ntlmssp_ctx
,
1385 &auth_info
.credentials
,
1390 DEBUG(3, (__location__
": Usupported auth type (%d) "
1391 "in alter-context call\n",
1392 auth_info
.auth_type
));
1396 if (NT_STATUS_IS_OK(status
)) {
1397 /* third leg of auth, verify auth info */
1398 status
= pipe_auth_verify_final(p
);
1399 if (!NT_STATUS_IS_OK(status
)) {
1400 DEBUG(0, ("Auth Verify failed (%s)\n",
1401 nt_errstr(status
)));
1404 } else if (NT_STATUS_EQUAL(status
,
1405 NT_STATUS_MORE_PROCESSING_REQUIRED
)) {
1406 DEBUG(10, ("More auth legs required.\n"));
1408 DEBUG(0, ("Auth step returned an error (%s)\n",
1409 nt_errstr(status
)));
1414 ZERO_STRUCT(u
.alter_resp
);
1415 u
.alter_resp
.max_xmit_frag
= RPC_MAX_PDU_FRAG_LEN
;
1416 u
.alter_resp
.max_recv_frag
= RPC_MAX_PDU_FRAG_LEN
;
1417 u
.alter_resp
.assoc_group_id
= assoc_gid
;
1419 /* secondary address CAN be NULL
1420 * as the specs say it's ignored.
1421 * It MUST be NULL to have the spoolss working.
1423 u
.alter_resp
.secondary_address
= "";
1424 u
.alter_resp
.secondary_address_size
= 1;
1426 u
.alter_resp
.num_results
= 1;
1427 u
.alter_resp
.ctx_list
= &bind_ack_ctx
;
1429 /* NOTE: We leave the auth_info empty so we can calculate the padding
1430 * later and then append the auth_info --simo */
1433 * Marshall directly into the outgoing PDU space. We
1434 * must do this as we need to set to the bind response
1435 * header and are never sending more than one PDU here.
1438 status
= dcerpc_push_ncacn_packet(p
->mem_ctx
,
1439 DCERPC_PKT_ALTER_RESP
,
1440 DCERPC_PFC_FLAG_FIRST
|
1441 DCERPC_PFC_FLAG_LAST
,
1446 if (!NT_STATUS_IS_OK(status
)) {
1447 DEBUG(0, ("Failed to marshall bind_ack packet. (%s)\n",
1448 nt_errstr(status
)));
1451 if (auth_resp
.length
) {
1453 /* Work out any padding needed before the auth footer. */
1454 pad_len
= p
->out_data
.frag
.length
% SERVER_NDR_PADDING_SIZE
;
1456 pad_len
= SERVER_NDR_PADDING_SIZE
- pad_len
;
1457 DEBUG(10, ("auth pad_len = %u\n",
1458 (unsigned int)pad_len
));
1461 status
= dcerpc_push_dcerpc_auth(pkt
,
1462 auth_info
.auth_type
,
1463 auth_info
.auth_level
,
1465 1, /* auth_context_id */
1468 if (!NT_STATUS_IS_OK(status
)) {
1469 DEBUG(0, ("Marshalling of dcerpc_auth failed.\n"));
1474 /* Now that we have the auth len store it into the right place in
1475 * the dcerpc header */
1476 dcerpc_set_frag_length(&p
->out_data
.frag
,
1477 p
->out_data
.frag
.length
+
1478 pad_len
+ auth_blob
.length
);
1480 if (auth_resp
.length
) {
1482 char pad
[SERVER_NDR_PADDING_SIZE
];
1483 memset(pad
, '\0', SERVER_NDR_PADDING_SIZE
);
1484 if (!data_blob_append(p
->mem_ctx
,
1487 DEBUG(0, ("api_pipe_bind_req: failed to add "
1488 "%u bytes of pad data.\n",
1489 (unsigned int)pad_len
));
1494 if (!data_blob_append(p
->mem_ctx
, &p
->out_data
.frag
,
1495 auth_blob
.data
, auth_blob
.length
)) {
1496 DEBUG(0, ("Append of auth info failed.\n"));
1502 * Setup the lengths for the initial reply.
1505 p
->out_data
.data_sent_length
= 0;
1506 p
->out_data
.current_pdu_sent
= 0;
1508 TALLOC_FREE(auth_blob
.data
);
1513 data_blob_free(&p
->out_data
.frag
);
1514 TALLOC_FREE(auth_blob
.data
);
1515 return setup_bind_nak(p
, pkt
);
1518 /****************************************************************************
1519 Find the set of RPC functions associated with this context_id
1520 ****************************************************************************/
1522 static PIPE_RPC_FNS
* find_pipe_fns_by_context( PIPE_RPC_FNS
*list
, uint32 context_id
)
1524 PIPE_RPC_FNS
*fns
= NULL
;
1527 DEBUG(0,("find_pipe_fns_by_context: ERROR! No context list for pipe!\n"));
1531 for (fns
=list
; fns
; fns
=fns
->next
) {
1532 if ( fns
->context_id
== context_id
)
1538 static bool api_rpcTNP(struct pipes_struct
*p
, struct ncacn_packet
*pkt
,
1539 const struct api_struct
*api_rpc_cmds
, int n_cmds
);
1541 /****************************************************************************
1542 Find the correct RPC function to call for this request.
1543 If the pipe is authenticated then become the correct UNIX user
1544 before doing the call.
1545 ****************************************************************************/
1547 static bool api_pipe_request(struct pipes_struct
*p
,
1548 struct ncacn_packet
*pkt
)
1551 bool changed_user
= False
;
1552 PIPE_RPC_FNS
*pipe_fns
;
1554 if (p
->pipe_bound
&&
1555 ((p
->auth
.auth_type
== DCERPC_AUTH_TYPE_NTLMSSP
) ||
1556 (p
->auth
.auth_type
== DCERPC_AUTH_TYPE_KRB5
) ||
1557 (p
->auth
.auth_type
== DCERPC_AUTH_TYPE_SPNEGO
))) {
1558 if(!become_authenticated_pipe_user(p
)) {
1559 data_blob_free(&p
->out_data
.rdata
);
1562 changed_user
= True
;
1565 DEBUG(5, ("Requested \\PIPE\\%s\n",
1566 get_pipe_name_from_syntax(talloc_tos(), &p
->syntax
)));
1568 /* get the set of RPC functions for this context */
1570 pipe_fns
= find_pipe_fns_by_context(p
->contexts
,
1571 pkt
->u
.request
.context_id
);
1574 TALLOC_CTX
*frame
= talloc_stackframe();
1575 ret
= api_rpcTNP(p
, pkt
, pipe_fns
->cmds
, pipe_fns
->n_cmds
);
1579 DEBUG(0, ("No rpc function table associated with context "
1580 "[%d] on pipe [%s]\n",
1581 pkt
->u
.request
.context_id
,
1582 get_pipe_name_from_syntax(talloc_tos(),
1587 unbecome_authenticated_pipe_user();
1593 /*******************************************************************
1594 Calls the underlying RPC function for a named pipe.
1595 ********************************************************************/
1597 static bool api_rpcTNP(struct pipes_struct
*p
, struct ncacn_packet
*pkt
,
1598 const struct api_struct
*api_rpc_cmds
, int n_cmds
)
1603 /* interpret the command */
1604 DEBUG(4,("api_rpcTNP: %s op 0x%x - ",
1605 get_pipe_name_from_syntax(talloc_tos(), &p
->syntax
),
1606 pkt
->u
.request
.opnum
));
1608 if (DEBUGLEVEL
>= 50) {
1610 slprintf(name
, sizeof(name
)-1, "in_%s",
1611 get_pipe_name_from_syntax(talloc_tos(), &p
->syntax
));
1612 dump_pdu_region(name
, pkt
->u
.request
.opnum
,
1613 &p
->in_data
.data
, 0,
1614 p
->in_data
.data
.length
);
1617 for (fn_num
= 0; fn_num
< n_cmds
; fn_num
++) {
1618 if (api_rpc_cmds
[fn_num
].opnum
== pkt
->u
.request
.opnum
&&
1619 api_rpc_cmds
[fn_num
].fn
!= NULL
) {
1620 DEBUG(3, ("api_rpcTNP: rpc command: %s\n",
1621 api_rpc_cmds
[fn_num
].name
));
1626 if (fn_num
== n_cmds
) {
1628 * For an unknown RPC just return a fault PDU but
1629 * return True to allow RPC's on the pipe to continue
1630 * and not put the pipe into fault state. JRA.
1632 DEBUG(4, ("unknown\n"));
1633 setup_fault_pdu(p
, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR
));
1637 offset1
= p
->out_data
.rdata
.length
;
1639 DEBUG(6, ("api_rpc_cmds[%d].fn == %p\n",
1640 fn_num
, api_rpc_cmds
[fn_num
].fn
));
1641 /* do the actual command */
1642 if(!api_rpc_cmds
[fn_num
].fn(p
)) {
1643 DEBUG(0,("api_rpcTNP: %s: %s failed.\n",
1644 get_pipe_name_from_syntax(talloc_tos(), &p
->syntax
),
1645 api_rpc_cmds
[fn_num
].name
));
1646 data_blob_free(&p
->out_data
.rdata
);
1650 if (p
->bad_handle_fault_state
) {
1651 DEBUG(4,("api_rpcTNP: bad handle fault return.\n"));
1652 p
->bad_handle_fault_state
= False
;
1653 setup_fault_pdu(p
, NT_STATUS(DCERPC_FAULT_CONTEXT_MISMATCH
));
1657 if (p
->rng_fault_state
) {
1658 DEBUG(4, ("api_rpcTNP: rng fault return\n"));
1659 p
->rng_fault_state
= False
;
1660 setup_fault_pdu(p
, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR
));
1664 if (DEBUGLEVEL
>= 50) {
1666 slprintf(name
, sizeof(name
)-1, "out_%s",
1667 get_pipe_name_from_syntax(talloc_tos(), &p
->syntax
));
1668 dump_pdu_region(name
, pkt
->u
.request
.opnum
,
1669 &p
->out_data
.rdata
, offset1
,
1670 p
->out_data
.rdata
.length
);
1673 DEBUG(5,("api_rpcTNP: called %s successfully\n",
1674 get_pipe_name_from_syntax(talloc_tos(), &p
->syntax
)));
1676 /* Check for buffer underflow in rpc parsing */
1677 if ((DEBUGLEVEL
>= 10) &&
1678 (pkt
->frag_length
< p
->in_data
.data
.length
)) {
1679 DEBUG(10, ("api_rpcTNP: rpc input buffer underflow (parse error?)\n"));
1680 dump_data(10, p
->in_data
.data
.data
+ pkt
->frag_length
,
1681 p
->in_data
.data
.length
- pkt
->frag_length
);
1687 /****************************************************************************
1688 Initialise an outgoing packet.
1689 ****************************************************************************/
1691 static bool pipe_init_outgoing_data(struct pipes_struct
*p
)
1693 output_data
*o_data
= &p
->out_data
;
1695 /* Reset the offset counters. */
1696 o_data
->data_sent_length
= 0;
1697 o_data
->current_pdu_sent
= 0;
1699 data_blob_free(&o_data
->frag
);
1701 /* Free any memory in the current return data buffer. */
1702 data_blob_free(&o_data
->rdata
);
1707 /****************************************************************************
1708 Sets the fault state on incoming packets.
1709 ****************************************************************************/
1711 void set_incoming_fault(struct pipes_struct
*p
)
1713 data_blob_free(&p
->in_data
.data
);
1714 p
->in_data
.pdu_needed_len
= 0;
1715 p
->in_data
.pdu
.length
= 0;
1716 p
->fault_state
= True
;
1717 DEBUG(10, ("set_incoming_fault: Setting fault state on pipe %s\n",
1718 get_pipe_name_from_syntax(talloc_tos(), &p
->syntax
)));
1721 static NTSTATUS
dcesrv_auth_request(struct pipe_auth_data
*auth
,
1722 struct ncacn_packet
*pkt
,
1726 size_t hdr_size
= DCERPC_REQUEST_LENGTH
;
1729 DEBUG(10, ("Checking request auth.\n"));
1731 if (pkt
->pfc_flags
& DCERPC_PFC_FLAG_OBJECT_UUID
) {
1735 /* in case of sealing this function will unseal the data in place */
1736 status
= dcerpc_check_auth(auth
, pkt
,
1737 &pkt
->u
.request
.stub_and_verifier
,
1740 if (!NT_STATUS_IS_OK(status
)) {
1745 /* remove padding and auth trailer,
1746 * this way the caller will get just the data */
1747 if (pkt
->auth_length
) {
1748 size_t trail_len
= pad_len
1749 + DCERPC_AUTH_TRAILER_LENGTH
1751 if (pkt
->u
.request
.stub_and_verifier
.length
< trail_len
) {
1752 return NT_STATUS_INFO_LENGTH_MISMATCH
;
1754 pkt
->u
.request
.stub_and_verifier
.length
-= trail_len
;
1757 return NT_STATUS_OK
;
1760 /****************************************************************************
1761 Processes a request pdu. This will do auth processing if needed, and
1762 appends the data into the complete stream if the LAST flag is not set.
1763 ****************************************************************************/
1765 static bool process_request_pdu(struct pipes_struct
*p
, struct ncacn_packet
*pkt
)
1770 if (!p
->pipe_bound
) {
1771 DEBUG(0,("process_request_pdu: rpc request with no bind.\n"));
1772 set_incoming_fault(p
);
1776 /* Store the opnum */
1777 p
->opnum
= pkt
->u
.request
.opnum
;
1779 status
= dcesrv_auth_request(&p
->auth
, pkt
, &p
->in_data
.pdu
);
1780 if (!NT_STATUS_IS_OK(status
)) {
1781 DEBUG(0, ("Failed to check packet auth. (%s)\n",
1782 nt_errstr(status
)));
1783 set_incoming_fault(p
);
1787 data
= pkt
->u
.request
.stub_and_verifier
;
1790 * Check the data length doesn't go over the 15Mb limit.
1791 * increased after observing a bug in the Windows NT 4.0 SP6a
1792 * spoolsv.exe when the response to a GETPRINTERDRIVER2 RPC
1793 * will not fit in the initial buffer of size 0x1068 --jerry 22/01/2002
1796 if (p
->in_data
.data
.length
+ data
.length
> MAX_RPC_DATA_SIZE
) {
1797 DEBUG(0, ("process_request_pdu: "
1798 "rpc data buffer too large (%u) + (%u)\n",
1799 (unsigned int)p
->in_data
.data
.length
,
1800 (unsigned int)data
.length
));
1801 set_incoming_fault(p
);
1806 * Append the data portion into the buffer and return.
1810 if (!data_blob_append(p
->mem_ctx
, &p
->in_data
.data
,
1811 data
.data
, data
.length
)) {
1812 DEBUG(0, ("Unable to append data size %u "
1813 "to parse buffer of size %u.\n",
1814 (unsigned int)data
.length
,
1815 (unsigned int)p
->in_data
.data
.length
));
1816 set_incoming_fault(p
);
1821 if (pkt
->pfc_flags
& DCERPC_PFC_FLAG_LAST
) {
1824 * Ok - we finally have a complete RPC stream.
1825 * Call the rpc command to process it.
1829 * Process the complete data stream here.
1831 if (pipe_init_outgoing_data(p
)) {
1832 ret
= api_pipe_request(p
, pkt
);
1841 /****************************************************************************
1842 Processes a finished PDU stored in p->in_data.pdu.
1843 ****************************************************************************/
1845 void process_complete_pdu(struct pipes_struct
*p
)
1847 struct ncacn_packet
*pkt
= NULL
;
1851 if(p
->fault_state
) {
1852 DEBUG(10,("process_complete_pdu: pipe %s in fault state.\n",
1853 get_pipe_name_from_syntax(talloc_tos(), &p
->syntax
)));
1857 pkt
= talloc(p
->mem_ctx
, struct ncacn_packet
);
1859 DEBUG(0, ("Out of memory!\n"));
1864 * Ensure we're using the corrent endianness for both the
1865 * RPC header flags and the raw data we will be reading from.
1867 if (dcerpc_get_endian_flag(&p
->in_data
.pdu
) & DCERPC_DREP_LE
) {
1868 p
->endian
= RPC_LITTLE_ENDIAN
;
1870 p
->endian
= RPC_BIG_ENDIAN
;
1872 DEBUG(10, ("PDU is in %s Endian format!\n", p
->endian
?"Big":"Little"));
1874 status
= dcerpc_pull_ncacn_packet(pkt
, &p
->in_data
.pdu
,
1876 if (!NT_STATUS_IS_OK(status
)) {
1877 DEBUG(0, ("Failed to unmarshal rpc packet: %s!\n",
1878 nt_errstr(status
)));
1882 /* Store the call_id */
1883 p
->call_id
= pkt
->call_id
;
1885 DEBUG(10, ("Processing packet type %d\n", (int)pkt
->ptype
));
1887 switch (pkt
->ptype
) {
1888 case DCERPC_PKT_REQUEST
:
1889 reply
= process_request_pdu(p
, pkt
);
1892 case DCERPC_PKT_PING
: /* CL request - ignore... */
1893 DEBUG(0, ("process_complete_pdu: Error. "
1894 "Connectionless packet type %d received on "
1895 "pipe %s.\n", (int)pkt
->ptype
,
1896 get_pipe_name_from_syntax(talloc_tos(),
1900 case DCERPC_PKT_RESPONSE
: /* No responses here. */
1901 DEBUG(0, ("process_complete_pdu: Error. "
1902 "DCERPC_PKT_RESPONSE received from client "
1904 get_pipe_name_from_syntax(talloc_tos(),
1908 case DCERPC_PKT_FAULT
:
1909 case DCERPC_PKT_WORKING
:
1910 /* CL request - reply to a ping when a call in process. */
1911 case DCERPC_PKT_NOCALL
:
1912 /* CL - server reply to a ping call. */
1913 case DCERPC_PKT_REJECT
:
1914 case DCERPC_PKT_ACK
:
1915 case DCERPC_PKT_CL_CANCEL
:
1916 case DCERPC_PKT_FACK
:
1917 case DCERPC_PKT_CANCEL_ACK
:
1918 DEBUG(0, ("process_complete_pdu: Error. "
1919 "Connectionless packet type %u received on "
1920 "pipe %s.\n", (unsigned int)pkt
->ptype
,
1921 get_pipe_name_from_syntax(talloc_tos(),
1925 case DCERPC_PKT_BIND
:
1927 * We assume that a pipe bind is only in one pdu.
1929 if (pipe_init_outgoing_data(p
)) {
1930 reply
= api_pipe_bind_req(p
, pkt
);
1934 case DCERPC_PKT_BIND_ACK
:
1935 case DCERPC_PKT_BIND_NAK
:
1936 DEBUG(0, ("process_complete_pdu: Error. "
1937 "DCERPC_PKT_BINDACK/DCERPC_PKT_BINDNACK "
1938 "packet type %u received on pipe %s.\n",
1939 (unsigned int)pkt
->ptype
,
1940 get_pipe_name_from_syntax(talloc_tos(),
1945 case DCERPC_PKT_ALTER
:
1947 * We assume that a pipe bind is only in one pdu.
1949 if (pipe_init_outgoing_data(p
)) {
1950 reply
= api_pipe_alter_context(p
, pkt
);
1954 case DCERPC_PKT_ALTER_RESP
:
1955 DEBUG(0, ("process_complete_pdu: Error. "
1956 "DCERPC_PKT_ALTER_RESP on pipe %s: "
1957 "Should only be server -> client.\n",
1958 get_pipe_name_from_syntax(talloc_tos(),
1962 case DCERPC_PKT_AUTH3
:
1964 * The third packet in an auth exchange.
1966 if (pipe_init_outgoing_data(p
)) {
1967 reply
= api_pipe_bind_auth3(p
, pkt
);
1971 case DCERPC_PKT_SHUTDOWN
:
1972 DEBUG(0, ("process_complete_pdu: Error. "
1973 "DCERPC_PKT_SHUTDOWN on pipe %s: "
1974 "Should only be server -> client.\n",
1975 get_pipe_name_from_syntax(talloc_tos(),
1979 case DCERPC_PKT_CO_CANCEL
:
1980 /* For now just free all client data and continue
1982 DEBUG(3,("process_complete_pdu: DCERPC_PKT_CO_CANCEL."
1983 " Abandoning rpc call.\n"));
1984 /* As we never do asynchronous RPC serving, we can
1985 * never cancel a call (as far as I know).
1986 * If we ever did we'd have to send a cancel_ack reply.
1987 * For now, just free all client data and continue
1993 /* Enable this if we're doing async rpc. */
1994 /* We must check the outstanding callid matches. */
1995 if (pipe_init_outgoing_data(p
)) {
1996 /* Send a cancel_ack PDU reply. */
1997 /* We should probably check the auth-verifier here. */
1998 reply
= setup_cancel_ack_reply(p
, pkt
);
2003 case DCERPC_PKT_ORPHANED
:
2004 /* We should probably check the auth-verifier here.
2005 * For now just free all client data and continue
2007 DEBUG(3, ("process_complete_pdu: DCERPC_PKT_ORPHANED."
2008 " Abandoning rpc call.\n"));
2013 DEBUG(0, ("process_complete_pdu: "
2014 "Unknown rpc type = %u received.\n",
2015 (unsigned int)pkt
->ptype
));
2021 DEBUG(3,("process_complete_pdu: DCE/RPC fault sent on "
2022 "pipe %s\n", get_pipe_name_from_syntax(talloc_tos(),
2024 set_incoming_fault(p
);
2025 setup_fault_pdu(p
, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR
));
2029 * Reset the lengths. We're ready for a new pdu.
2031 TALLOC_FREE(p
->in_data
.pdu
.data
);
2032 p
->in_data
.pdu_needed_len
= 0;
2033 p
->in_data
.pdu
.length
= 0;