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_ntlmssp.h"
37 #include "dcesrv_gssapi.h"
38 #include "dcesrv_spnego.h"
39 #include "rpc_server.h"
41 #include "smbd/smbd.h"
44 #include "rpc_server/srv_pipe.h"
45 #include "rpc_server/rpc_contexts.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;
339 DEBUG(3,("check_bind_req for %s\n",
340 get_pipe_name_from_syntax(talloc_tos(), abstract)));
342 /* we have to check all now since win2k introduced a new UUID on the lsaprpc pipe */
343 if (rpc_srv_pipe_exists_by_id(abstract) &&
344 ndr_syntax_id_equal(transfer, &ndr_transfer_syntax)) {
345 DEBUG(3, ("check_bind_req: %s -> %s rpc service\n",
346 rpc_srv_get_pipe_cli_name(abstract),
347 rpc_srv_get_pipe_srv_name(abstract)));
352 context_fns = SMB_MALLOC_P(struct pipe_rpc_fns);
353 if (context_fns == NULL) {
354 DEBUG(0,("check_bind_req: malloc() failed!\n"));
358 context_fns->next = context_fns->prev = NULL;
359 context_fns->n_cmds = rpc_srv_get_pipe_num_cmds(abstract);
360 context_fns->cmds = rpc_srv_get_pipe_cmds(abstract);
361 context_fns->context_id = context_id;
362 context_fns->syntax = *abstract;
364 /* add to the list of open contexts */
366 DLIST_ADD( p->contexts, context_fns );
372 * Is a named pipe known?
373 * @param[in] cli_filename The pipe name requested by the client
374 * @result Do we want to serve this?
376 bool is_known_pipename(const char *cli_filename, struct ndr_syntax_id *syntax)
378 const char *pipename = cli_filename;
381 if (strnequal(pipename, "\\PIPE\\", 6)) {
385 if (*pipename == '\\') {
389 if (lp_disable_spoolss() && strequal(pipename, "spoolss")) {
390 DEBUG(10, ("refusing spoolss access\n"));
394 if (rpc_srv_get_pipe_interface_by_cli_name(pipename, syntax)) {
398 status = smb_probe_module("rpc", pipename);
399 if (!NT_STATUS_IS_OK(status)) {
400 DEBUG(10, ("is_known_pipename: %s unknown\n", cli_filename));
403 DEBUG(10, ("is_known_pipename: %s loaded dynamically\n", pipename));
406 * Scan the list again for the interface id
408 if (rpc_srv_get_pipe_interface_by_cli_name(pipename, syntax)) {
412 DEBUG(10, ("is_known_pipename: pipe %s did not register itself!\n",
418 /*******************************************************************
419 Handle the first part of a SPNEGO bind auth.
420 *******************************************************************/
422 static bool pipe_spnego_auth_bind(struct pipes_struct *p,
424 struct dcerpc_auth *auth_info,
427 struct spnego_context *spnego_ctx;
430 status = spnego_server_auth_start(p,
431 (auth_info->auth_level ==
432 DCERPC_AUTH_LEVEL_INTEGRITY),
433 (auth_info->auth_level ==
434 DCERPC_AUTH_LEVEL_PRIVACY),
436 &auth_info->credentials,
439 if (!NT_STATUS_IS_OK(status)) {
440 DEBUG(0, ("Failed SPNEGO negotiate (%s)\n",
445 /* Make sure data is bound to the memctx, to be freed the caller */
446 talloc_steal(mem_ctx, response->data);
448 p->auth.auth_ctx = spnego_ctx;
449 p->auth.auth_type = DCERPC_AUTH_TYPE_SPNEGO;
451 DEBUG(10, ("SPNEGO auth started\n"));
456 /*******************************************************************
457 Handle an schannel bind auth.
458 *******************************************************************/
460 static bool pipe_schannel_auth_bind(struct pipes_struct *p,
462 struct dcerpc_auth *auth_info,
465 struct NL_AUTH_MESSAGE neg;
466 struct NL_AUTH_MESSAGE reply;
469 struct netlogon_creds_CredentialState *creds;
470 enum ndr_err_code ndr_err;
471 struct schannel_state *schannel_auth;
473 ndr_err = ndr_pull_struct_blob(
474 &auth_info->credentials, mem_ctx, &neg,
475 (ndr_pull_flags_fn_t)ndr_pull_NL_AUTH_MESSAGE);
476 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
477 DEBUG(0,("pipe_schannel_auth_bind: Could not unmarshal SCHANNEL auth neg\n"));
481 if (DEBUGLEVEL >= 10) {
482 NDR_PRINT_DEBUG(NL_AUTH_MESSAGE, &neg);
485 if (!(neg.Flags & NL_FLAG_OEM_NETBIOS_COMPUTER_NAME)) {
486 DEBUG(0,("pipe_schannel_auth_bind: Did not receive netbios computer name\n"));
491 * The neg.oem_netbios_computer.a key here must match the remote computer name
492 * given in the DOM_CLNT_SRV.uni_comp_name used on all netlogon pipe
493 * operations that use credentials.
497 status = schannel_get_creds_state(p, lp_private_dir(),
498 neg.oem_netbios_computer.a, &creds);
501 if (!NT_STATUS_IS_OK(status)) {
502 DEBUG(0, ("pipe_schannel_auth_bind: Attempt to bind using schannel without successful serverauth2\n"));
506 schannel_auth = talloc(p, struct schannel_state);
507 if (!schannel_auth) {
512 schannel_auth->state = SCHANNEL_STATE_START;
513 schannel_auth->seq_num = 0;
514 schannel_auth->initiator = false;
515 schannel_auth->creds = creds;
518 * JRA. Should we also copy the schannel session key into the pipe session key p->session_key
519 * here ? We do that for NTLMSSP, but the session key is already set up from the vuser
520 * struct of the person who opened the pipe. I need to test this further. JRA.
522 * VL. As we are mapping this to guest set the generic key
523 * "SystemLibraryDTC" key here. It's a bit difficult to test against
524 * W2k3, as it does not allow schannel binds against SAMR and LSA
528 ret = session_info_set_session_key(p->session_info, generic_session_key());
531 DEBUG(0, ("session_info_set_session_key failed\n"));
535 /*** SCHANNEL verifier ***/
537 reply.MessageType = NL_NEGOTIATE_RESPONSE;
539 reply.Buffer.dummy = 5; /* ??? actually I don't think
540 * this has any meaning
543 ndr_err = ndr_push_struct_blob(response, mem_ctx, &reply,
544 (ndr_push_flags_fn_t)ndr_push_NL_AUTH_MESSAGE);
545 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
546 DEBUG(0,("Failed to marshall NL_AUTH_MESSAGE.\n"));
550 if (DEBUGLEVEL >= 10) {
551 NDR_PRINT_DEBUG(NL_AUTH_MESSAGE, &reply);
554 DEBUG(10,("pipe_schannel_auth_bind: schannel auth: domain [%s] myname [%s]\n",
555 neg.oem_netbios_domain.a, neg.oem_netbios_computer.a));
557 /* We're finished with this bind - no more packets. */
558 p->auth.auth_ctx = schannel_auth;
559 p->auth.auth_type = DCERPC_AUTH_TYPE_SCHANNEL;
561 p->pipe_bound = True;
566 /*******************************************************************
567 Handle an NTLMSSP bind auth.
568 *******************************************************************/
570 static bool pipe_ntlmssp_auth_bind(struct pipes_struct *p,
572 struct dcerpc_auth *auth_info,
575 struct auth_ntlmssp_state *ntlmssp_state = NULL;
578 if (strncmp((char *)auth_info->credentials.data, "NTLMSSP", 7) != 0) {
579 DEBUG(0, ("Failed to read NTLMSSP in blob\n"));
583 /* We have an NTLMSSP blob. */
584 status = ntlmssp_server_auth_start(p,
585 (auth_info->auth_level ==
586 DCERPC_AUTH_LEVEL_INTEGRITY),
587 (auth_info->auth_level ==
588 DCERPC_AUTH_LEVEL_PRIVACY),
590 &auth_info->credentials,
593 if (!NT_STATUS_EQUAL(status, NT_STATUS_OK)) {
594 DEBUG(0, (__location__ ": auth_ntlmssp_start failed: %s\n",
599 /* Make sure data is bound to the memctx, to be freed the caller */
600 talloc_steal(mem_ctx, response->data);
602 p->auth.auth_ctx = ntlmssp_state;
603 p->auth.auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
605 DEBUG(10, (__location__ ": NTLMSSP auth started\n"));
610 /*******************************************************************
611 Process an NTLMSSP authentication response.
612 If this function succeeds, the user has been authenticated
613 and their domain, name and calling workstation stored in
615 *******************************************************************/
617 static bool pipe_ntlmssp_verify_final(TALLOC_CTX *mem_ctx,
618 struct auth_ntlmssp_state *ntlmssp_ctx,
619 enum dcerpc_AuthLevel auth_level,
620 struct client_address *client_id,
621 struct ndr_syntax_id *syntax,
622 struct auth_serversupplied_info **session_info)
627 DEBUG(5, (__location__ ": pipe %s checking user details\n",
628 get_pipe_name_from_syntax(talloc_tos(), syntax)));
630 /* Finally - if the pipe negotiated integrity (sign) or privacy (seal)
631 ensure the underlying NTLMSSP flags are also set. If not we should
634 status = ntlmssp_server_check_flags(ntlmssp_ctx,
636 DCERPC_AUTH_LEVEL_INTEGRITY),
638 DCERPC_AUTH_LEVEL_PRIVACY));
639 if (!NT_STATUS_IS_OK(status)) {
640 DEBUG(0, (__location__ ": Client failed to negotatie proper "
641 "security for pipe %s\n",
642 get_pipe_name_from_syntax(talloc_tos(), syntax)));
646 TALLOC_FREE(*session_info);
648 status = ntlmssp_server_get_user_info(ntlmssp_ctx,
649 mem_ctx, session_info);
650 if (!NT_STATUS_IS_OK(status)) {
651 DEBUG(0, (__location__ ": failed to obtain the server info "
652 "for authenticated user: %s\n", nt_errstr(status)));
656 if ((*session_info)->security_token == NULL) {
657 DEBUG(1, ("Auth module failed to provide nt_user_token\n"));
662 * We're an authenticated bind over smb, so the session key needs to
663 * be set to "SystemLibraryDTC". Weird, but this is what Windows
664 * does. See the RPC-SAMBA3SESSIONKEY.
667 ret = session_info_set_session_key((*session_info), generic_session_key());
669 DEBUG(0, ("Failed to set session key!\n"));
676 /*******************************************************************
677 Handle a GSSAPI bind auth.
678 *******************************************************************/
680 static bool pipe_gssapi_auth_bind(struct pipes_struct *p,
682 struct dcerpc_auth *auth_info,
686 struct gse_context *gse_ctx = NULL;
688 status = gssapi_server_auth_start(p,
689 (auth_info->auth_level ==
690 DCERPC_AUTH_LEVEL_INTEGRITY),
691 (auth_info->auth_level ==
692 DCERPC_AUTH_LEVEL_PRIVACY),
694 &auth_info->credentials,
697 if (!NT_STATUS_IS_OK(status)) {
698 DEBUG(0, ("Failed to init dcerpc gssapi server (%s)\n",
703 /* Make sure data is bound to the memctx, to be freed the caller */
704 talloc_steal(mem_ctx, response->data);
706 p->auth.auth_ctx = gse_ctx;
707 p->auth.auth_type = DCERPC_AUTH_TYPE_KRB5;
709 DEBUG(10, ("KRB5 auth started\n"));
714 TALLOC_FREE(gse_ctx);
718 static NTSTATUS pipe_gssapi_verify_final(TALLOC_CTX *mem_ctx,
719 struct gse_context *gse_ctx,
720 struct client_address *client_id,
721 struct auth_serversupplied_info **session_info)
726 /* Finally - if the pipe negotiated integrity (sign) or privacy (seal)
727 ensure the underlying flags are also set. If not we should
730 status = gssapi_server_check_flags(gse_ctx);
731 if (!NT_STATUS_IS_OK(status)) {
732 DEBUG(0, ("Requested Security Layers not honored!\n"));
736 status = gssapi_server_get_user_info(gse_ctx, mem_ctx,
737 client_id, session_info);
738 if (!NT_STATUS_IS_OK(status)) {
739 DEBUG(0, (__location__ ": failed to obtain the server info "
740 "for authenticated user: %s\n", nt_errstr(status)));
745 * We're an authenticated bind over smb, so the session key needs to
746 * be set to "SystemLibraryDTC". Weird, but this is what Windows
747 * does. See the RPC-SAMBA3SESSIONKEY.
750 bret = session_info_set_session_key((*session_info), generic_session_key());
752 return NT_STATUS_ACCESS_DENIED;
758 static NTSTATUS pipe_auth_verify_final(struct pipes_struct *p)
760 enum spnego_mech auth_type;
761 struct auth_ntlmssp_state *ntlmssp_ctx;
762 struct spnego_context *spnego_ctx;
763 struct gse_context *gse_ctx;
767 switch (p->auth.auth_type) {
768 case DCERPC_AUTH_TYPE_NTLMSSP:
769 ntlmssp_ctx = talloc_get_type_abort(p->auth.auth_ctx,
770 struct auth_ntlmssp_state);
771 if (!pipe_ntlmssp_verify_final(p, ntlmssp_ctx,
773 p->client_id, &p->syntax,
775 return NT_STATUS_ACCESS_DENIED;
778 case DCERPC_AUTH_TYPE_KRB5:
779 gse_ctx = talloc_get_type_abort(p->auth.auth_ctx,
781 status = pipe_gssapi_verify_final(p, gse_ctx,
784 if (!NT_STATUS_IS_OK(status)) {
785 DEBUG(1, ("gssapi bind failed with: %s",
790 case DCERPC_AUTH_TYPE_SPNEGO:
791 spnego_ctx = talloc_get_type_abort(p->auth.auth_ctx,
792 struct spnego_context);
793 status = spnego_get_negotiated_mech(spnego_ctx,
794 &auth_type, &mech_ctx);
795 if (!NT_STATUS_IS_OK(status)) {
796 DEBUG(0, ("Bad SPNEGO state (%s)\n",
802 gse_ctx = talloc_get_type_abort(mech_ctx,
804 status = pipe_gssapi_verify_final(p, gse_ctx,
807 if (!NT_STATUS_IS_OK(status)) {
808 DEBUG(1, ("gssapi bind failed with: %s",
814 ntlmssp_ctx = talloc_get_type_abort(mech_ctx,
815 struct auth_ntlmssp_state);
816 if (!pipe_ntlmssp_verify_final(p, ntlmssp_ctx,
821 return NT_STATUS_ACCESS_DENIED;
825 DEBUG(0, (__location__ ": incorrect spnego type "
826 "(%d).\n", auth_type));
827 return NT_STATUS_ACCESS_DENIED;
831 DEBUG(0, (__location__ ": incorrect auth type (%u).\n",
832 (unsigned int)p->auth.auth_type));
833 return NT_STATUS_ACCESS_DENIED;
836 p->pipe_bound = true;
841 /*******************************************************************
842 Respond to a pipe bind request.
843 *******************************************************************/
845 static bool api_pipe_bind_req(struct pipes_struct *p,
846 struct ncacn_packet *pkt)
848 struct dcerpc_auth auth_info;
850 unsigned int auth_type = DCERPC_AUTH_TYPE_NONE;
852 struct ndr_syntax_id id;
853 union dcerpc_payload u;
854 struct dcerpc_ack_ctx bind_ack_ctx;
855 DATA_BLOB auth_resp = data_blob_null;
856 DATA_BLOB auth_blob = data_blob_null;
858 /* No rebinds on a bound pipe - use alter context. */
860 DEBUG(2,("Rejecting bind request on bound rpc connection\n"));
861 return setup_bind_nak(p, pkt);
864 if (pkt->u.bind.num_contexts == 0) {
865 DEBUG(0, ("api_pipe_bind_req: no rpc contexts around\n"));
870 * Try and find the correct pipe name to ensure
871 * that this is a pipe name we support.
873 id = pkt->u.bind.ctx_list[0].abstract_syntax;
874 if (rpc_srv_pipe_exists_by_id(&id)) {
875 DEBUG(3, ("api_pipe_bind_req: %s -> %s rpc service\n",
876 rpc_srv_get_pipe_cli_name(&id),
877 rpc_srv_get_pipe_srv_name(&id)));
879 status = smb_probe_module(
880 "rpc", get_pipe_name_from_syntax(
884 if (NT_STATUS_IS_ERR(status)) {
885 DEBUG(3,("api_pipe_bind_req: Unknown rpc service name "
886 "%s in bind request.\n",
887 get_pipe_name_from_syntax(talloc_tos(), &id)));
889 return setup_bind_nak(p, pkt);
892 if (rpc_srv_get_pipe_interface_by_cli_name(
893 get_pipe_name_from_syntax(talloc_tos(),
896 DEBUG(3, ("api_pipe_bind_req: %s -> %s rpc service\n",
897 rpc_srv_get_pipe_cli_name(&id),
898 rpc_srv_get_pipe_srv_name(&id)));
900 DEBUG(0, ("module %s doesn't provide functions for "
902 get_pipe_name_from_syntax(talloc_tos(), &id),
903 get_pipe_name_from_syntax(talloc_tos(), &id)));
904 return setup_bind_nak(p, pkt);
908 DEBUG(5,("api_pipe_bind_req: make response. %d\n", __LINE__));
910 if (pkt->u.bind.assoc_group_id != 0) {
911 assoc_gid = pkt->u.bind.assoc_group_id;
917 * Create the bind response struct.
920 /* If the requested abstract synt uuid doesn't match our client pipe,
921 reject the bind_ack & set the transfer interface synt to all 0's,
922 ver 0 (observed when NT5 attempts to bind to abstract interfaces
924 Needed when adding entries to a DACL from NT5 - SK */
926 if (check_bind_req(p,
927 &pkt->u.bind.ctx_list[0].abstract_syntax,
928 &pkt->u.bind.ctx_list[0].transfer_syntaxes[0],
929 pkt->u.bind.ctx_list[0].context_id)) {
931 bind_ack_ctx.result = 0;
932 bind_ack_ctx.reason = 0;
933 bind_ack_ctx.syntax = pkt->u.bind.ctx_list[0].transfer_syntaxes[0];
935 p->pipe_bound = False;
936 /* Rejection reason: abstract syntax not supported */
937 bind_ack_ctx.result = DCERPC_BIND_PROVIDER_REJECT;
938 bind_ack_ctx.reason = DCERPC_BIND_REASON_ASYNTAX;
939 bind_ack_ctx.syntax = null_ndr_syntax_id;
943 * Check if this is an authenticated bind request.
945 if (pkt->auth_length) {
946 /* Quick length check. Won't catch a bad auth footer,
947 * prevents overrun. */
949 if (pkt->frag_length < RPC_HEADER_LEN +
950 DCERPC_AUTH_TRAILER_LENGTH +
952 DEBUG(0,("api_pipe_bind_req: auth_len (%u) "
953 "too long for fragment %u.\n",
954 (unsigned int)pkt->auth_length,
955 (unsigned int)pkt->frag_length));
960 * Decode the authentication verifier.
962 status = dcerpc_pull_dcerpc_auth(pkt,
963 &pkt->u.bind.auth_info,
964 &auth_info, p->endian);
965 if (!NT_STATUS_IS_OK(status)) {
966 DEBUG(0, ("Unable to unmarshall dcerpc_auth.\n"));
970 auth_type = auth_info.auth_type;
972 /* Work out if we have to sign or seal etc. */
973 switch (auth_info.auth_level) {
974 case DCERPC_AUTH_LEVEL_INTEGRITY:
975 p->auth.auth_level = DCERPC_AUTH_LEVEL_INTEGRITY;
977 case DCERPC_AUTH_LEVEL_PRIVACY:
978 p->auth.auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
980 case DCERPC_AUTH_LEVEL_CONNECT:
981 p->auth.auth_level = DCERPC_AUTH_LEVEL_CONNECT;
984 DEBUG(0, ("Unexpected auth level (%u).\n",
985 (unsigned int)auth_info.auth_level ));
990 case DCERPC_AUTH_TYPE_NTLMSSP:
991 if (!pipe_ntlmssp_auth_bind(p, pkt,
992 &auth_info, &auth_resp)) {
998 case DCERPC_AUTH_TYPE_SCHANNEL:
999 if (!pipe_schannel_auth_bind(p, pkt,
1000 &auth_info, &auth_resp)) {
1005 case DCERPC_AUTH_TYPE_SPNEGO:
1006 if (!pipe_spnego_auth_bind(p, pkt,
1007 &auth_info, &auth_resp)) {
1012 case DCERPC_AUTH_TYPE_KRB5:
1013 if (!pipe_gssapi_auth_bind(p, pkt,
1014 &auth_info, &auth_resp)) {
1019 case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
1020 if (p->transport == NCALRPC && p->ncalrpc_as_system) {
1021 TALLOC_FREE(p->session_info);
1023 status = make_session_info_system(p,
1025 if (!NT_STATUS_IS_OK(status)) {
1029 auth_resp = data_blob_talloc(pkt,
1033 p->auth.auth_type = DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM;
1034 p->pipe_bound = true;
1040 case DCERPC_AUTH_TYPE_NONE:
1044 DEBUG(0, ("Unknown auth type %x requested.\n", auth_type));
1049 if (auth_type == DCERPC_AUTH_TYPE_NONE) {
1050 /* Unauthenticated bind request. */
1051 /* We're finished - no more packets. */
1052 p->auth.auth_type = DCERPC_AUTH_TYPE_NONE;
1053 /* We must set the pipe auth_level here also. */
1054 p->auth.auth_level = DCERPC_AUTH_LEVEL_NONE;
1055 p->pipe_bound = True;
1056 /* The session key was initialized from the SMB
1057 * session in make_internal_rpc_pipe_p */
1060 ZERO_STRUCT(u.bind_ack);
1061 u.bind_ack.max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
1062 u.bind_ack.max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
1063 u.bind_ack.assoc_group_id = assoc_gid;
1065 /* name has to be \PIPE\xxxxx */
1066 u.bind_ack.secondary_address =
1067 talloc_asprintf(pkt, "\\PIPE\\%s",
1068 rpc_srv_get_pipe_srv_name(&id));
1069 if (!u.bind_ack.secondary_address) {
1070 DEBUG(0, ("Out of memory!\n"));
1073 u.bind_ack.secondary_address_size =
1074 strlen(u.bind_ack.secondary_address) + 1;
1076 u.bind_ack.num_results = 1;
1077 u.bind_ack.ctx_list = &bind_ack_ctx;
1079 /* NOTE: We leave the auth_info empty so we can calculate the padding
1080 * later and then append the auth_info --simo */
1083 * Marshall directly into the outgoing PDU space. We
1084 * must do this as we need to set to the bind response
1085 * header and are never sending more than one PDU here.
1088 status = dcerpc_push_ncacn_packet(p->mem_ctx,
1089 DCERPC_PKT_BIND_ACK,
1090 DCERPC_PFC_FLAG_FIRST |
1091 DCERPC_PFC_FLAG_LAST,
1096 if (!NT_STATUS_IS_OK(status)) {
1097 DEBUG(0, ("Failed to marshall bind_ack packet. (%s)\n",
1098 nt_errstr(status)));
1101 if (auth_resp.length) {
1103 status = dcerpc_push_dcerpc_auth(pkt,
1105 auth_info.auth_level,
1107 1, /* auth_context_id */
1110 if (!NT_STATUS_IS_OK(status)) {
1111 DEBUG(0, ("Marshalling of dcerpc_auth failed.\n"));
1116 /* Now that we have the auth len store it into the right place in
1117 * the dcerpc header */
1118 dcerpc_set_frag_length(&p->out_data.frag,
1119 p->out_data.frag.length + auth_blob.length);
1121 if (auth_blob.length) {
1123 if (!data_blob_append(p->mem_ctx, &p->out_data.frag,
1124 auth_blob.data, auth_blob.length)) {
1125 DEBUG(0, ("Append of auth info failed.\n"));
1131 * Setup the lengths for the initial reply.
1134 p->out_data.data_sent_length = 0;
1135 p->out_data.current_pdu_sent = 0;
1137 TALLOC_FREE(auth_blob.data);
1142 data_blob_free(&p->out_data.frag);
1143 TALLOC_FREE(auth_blob.data);
1144 return setup_bind_nak(p, pkt);
1147 /*******************************************************************
1148 This is the "stage3" response after a bind request and reply.
1149 *******************************************************************/
1151 bool api_pipe_bind_auth3(struct pipes_struct *p, struct ncacn_packet *pkt)
1153 struct dcerpc_auth auth_info;
1154 DATA_BLOB response = data_blob_null;
1155 struct auth_ntlmssp_state *ntlmssp_ctx;
1156 struct spnego_context *spnego_ctx;
1157 struct gse_context *gse_ctx;
1160 DEBUG(5, ("api_pipe_bind_auth3: decode request. %d\n", __LINE__));
1162 if (pkt->auth_length == 0) {
1163 DEBUG(0, ("No auth field sent for bind request!\n"));
1167 /* Ensure there's enough data for an authenticated request. */
1168 if (pkt->frag_length < RPC_HEADER_LEN
1169 + DCERPC_AUTH_TRAILER_LENGTH
1170 + pkt->auth_length) {
1171 DEBUG(0,("api_pipe_ntlmssp_auth_process: auth_len "
1172 "%u is too large.\n",
1173 (unsigned int)pkt->auth_length));
1178 * Decode the authentication verifier response.
1181 status = dcerpc_pull_dcerpc_auth(pkt,
1182 &pkt->u.auth3.auth_info,
1183 &auth_info, p->endian);
1184 if (!NT_STATUS_IS_OK(status)) {
1185 DEBUG(0, ("Failed to unmarshall dcerpc_auth.\n"));
1189 /* We must NEVER look at auth_info->auth_pad_len here,
1190 * as old Samba client code gets it wrong and sends it
1194 if (auth_info.auth_type != p->auth.auth_type) {
1195 DEBUG(0, ("Auth type mismatch! Client sent %d, "
1196 "but auth was started as type %d!\n",
1197 auth_info.auth_type, p->auth.auth_type));
1201 switch (auth_info.auth_type) {
1202 case DCERPC_AUTH_TYPE_NTLMSSP:
1203 ntlmssp_ctx = talloc_get_type_abort(p->auth.auth_ctx,
1204 struct auth_ntlmssp_state);
1205 status = ntlmssp_server_step(ntlmssp_ctx,
1206 pkt, &auth_info.credentials,
1209 case DCERPC_AUTH_TYPE_KRB5:
1210 gse_ctx = talloc_get_type_abort(p->auth.auth_ctx,
1211 struct gse_context);
1212 status = gssapi_server_step(gse_ctx,
1213 pkt, &auth_info.credentials,
1216 case DCERPC_AUTH_TYPE_SPNEGO:
1217 spnego_ctx = talloc_get_type_abort(p->auth.auth_ctx,
1218 struct spnego_context);
1219 status = spnego_server_step(spnego_ctx,
1220 pkt, &auth_info.credentials,
1224 DEBUG(0, (__location__ ": incorrect auth type (%u).\n",
1225 (unsigned int)auth_info.auth_type));
1229 if (NT_STATUS_EQUAL(status,
1230 NT_STATUS_MORE_PROCESSING_REQUIRED) ||
1232 DEBUG(0, (__location__ ": This was supposed to be the final "
1233 "leg, but crypto machinery claims a response is "
1234 "needed, aborting auth!\n"));
1235 data_blob_free(&response);
1238 if (!NT_STATUS_IS_OK(status)) {
1239 DEBUG(0, ("Auth failed (%s)\n", nt_errstr(status)));
1243 /* Now verify auth was indeed successful and extract server info */
1244 status = pipe_auth_verify_final(p);
1245 if (!NT_STATUS_IS_OK(status)) {
1246 DEBUG(0, ("Auth Verify failed (%s)\n", nt_errstr(status)));
1254 TALLOC_FREE(p->auth.auth_ctx);
1258 /****************************************************************************
1259 Deal with an alter context call. Can be third part of 3 leg auth request for
1261 ****************************************************************************/
1263 static bool api_pipe_alter_context(struct pipes_struct *p,
1264 struct ncacn_packet *pkt)
1266 struct dcerpc_auth auth_info;
1269 union dcerpc_payload u;
1270 struct dcerpc_ack_ctx bind_ack_ctx;
1271 DATA_BLOB auth_resp = data_blob_null;
1272 DATA_BLOB auth_blob = data_blob_null;
1274 struct auth_ntlmssp_state *ntlmssp_ctx;
1275 struct spnego_context *spnego_ctx;
1276 struct gse_context *gse_ctx;
1278 DEBUG(5,("api_pipe_alter_context: make response. %d\n", __LINE__));
1280 if (pkt->u.bind.assoc_group_id != 0) {
1281 assoc_gid = pkt->u.bind.assoc_group_id;
1287 * Create the bind response struct.
1290 /* If the requested abstract synt uuid doesn't match our client pipe,
1291 reject the bind_ack & set the transfer interface synt to all 0's,
1292 ver 0 (observed when NT5 attempts to bind to abstract interfaces
1294 Needed when adding entries to a DACL from NT5 - SK */
1296 if (check_bind_req(p,
1297 &pkt->u.bind.ctx_list[0].abstract_syntax,
1298 &pkt->u.bind.ctx_list[0].transfer_syntaxes[0],
1299 pkt->u.bind.ctx_list[0].context_id)) {
1301 bind_ack_ctx.result = 0;
1302 bind_ack_ctx.reason = 0;
1303 bind_ack_ctx.syntax = pkt->u.bind.ctx_list[0].transfer_syntaxes[0];
1305 p->pipe_bound = False;
1306 /* Rejection reason: abstract syntax not supported */
1307 bind_ack_ctx.result = DCERPC_BIND_PROVIDER_REJECT;
1308 bind_ack_ctx.reason = DCERPC_BIND_REASON_ASYNTAX;
1309 bind_ack_ctx.syntax = null_ndr_syntax_id;
1313 * Check if this is an authenticated alter context request.
1315 if (pkt->auth_length) {
1316 /* Quick length check. Won't catch a bad auth footer,
1317 * prevents overrun. */
1319 if (pkt->frag_length < RPC_HEADER_LEN +
1320 DCERPC_AUTH_TRAILER_LENGTH +
1322 DEBUG(0,("api_pipe_alter_context: auth_len (%u) "
1323 "too long for fragment %u.\n",
1324 (unsigned int)pkt->auth_length,
1325 (unsigned int)pkt->frag_length ));
1329 status = dcerpc_pull_dcerpc_auth(pkt,
1330 &pkt->u.bind.auth_info,
1331 &auth_info, p->endian);
1332 if (!NT_STATUS_IS_OK(status)) {
1333 DEBUG(0, ("Unable to unmarshall dcerpc_auth.\n"));
1337 /* We can only finish if the pipe is unbound for now */
1338 if (p->pipe_bound) {
1339 DEBUG(0, (__location__ ": Pipe already bound, "
1340 "Altering Context not yet supported!\n"));
1344 if (auth_info.auth_type != p->auth.auth_type) {
1345 DEBUG(0, ("Auth type mismatch! Client sent %d, "
1346 "but auth was started as type %d!\n",
1347 auth_info.auth_type, p->auth.auth_type));
1352 switch (auth_info.auth_type) {
1353 case DCERPC_AUTH_TYPE_SPNEGO:
1354 spnego_ctx = talloc_get_type_abort(p->auth.auth_ctx,
1355 struct spnego_context);
1356 status = spnego_server_step(spnego_ctx,
1358 &auth_info.credentials,
1362 case DCERPC_AUTH_TYPE_KRB5:
1363 gse_ctx = talloc_get_type_abort(p->auth.auth_ctx,
1364 struct gse_context);
1365 status = gssapi_server_step(gse_ctx,
1367 &auth_info.credentials,
1370 case DCERPC_AUTH_TYPE_NTLMSSP:
1371 ntlmssp_ctx = talloc_get_type_abort(p->auth.auth_ctx,
1372 struct auth_ntlmssp_state);
1373 status = ntlmssp_server_step(ntlmssp_ctx,
1375 &auth_info.credentials,
1380 DEBUG(3, (__location__ ": Usupported auth type (%d) "
1381 "in alter-context call\n",
1382 auth_info.auth_type));
1386 if (NT_STATUS_IS_OK(status)) {
1387 /* third leg of auth, verify auth info */
1388 status = pipe_auth_verify_final(p);
1389 if (!NT_STATUS_IS_OK(status)) {
1390 DEBUG(0, ("Auth Verify failed (%s)\n",
1391 nt_errstr(status)));
1394 } else if (NT_STATUS_EQUAL(status,
1395 NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1396 DEBUG(10, ("More auth legs required.\n"));
1398 DEBUG(0, ("Auth step returned an error (%s)\n",
1399 nt_errstr(status)));
1404 ZERO_STRUCT(u.alter_resp);
1405 u.alter_resp.max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
1406 u.alter_resp.max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
1407 u.alter_resp.assoc_group_id = assoc_gid;
1409 /* secondary address CAN be NULL
1410 * as the specs say it's ignored.
1411 * It MUST be NULL to have the spoolss working.
1413 u.alter_resp.secondary_address = "";
1414 u.alter_resp.secondary_address_size = 1;
1416 u.alter_resp.num_results = 1;
1417 u.alter_resp.ctx_list = &bind_ack_ctx;
1419 /* NOTE: We leave the auth_info empty so we can calculate the padding
1420 * later and then append the auth_info --simo */
1423 * Marshall directly into the outgoing PDU space. We
1424 * must do this as we need to set to the bind response
1425 * header and are never sending more than one PDU here.
1428 status = dcerpc_push_ncacn_packet(p->mem_ctx,
1429 DCERPC_PKT_ALTER_RESP,
1430 DCERPC_PFC_FLAG_FIRST |
1431 DCERPC_PFC_FLAG_LAST,
1436 if (!NT_STATUS_IS_OK(status)) {
1437 DEBUG(0, ("Failed to marshall bind_ack packet. (%s)\n",
1438 nt_errstr(status)));
1441 if (auth_resp.length) {
1443 /* Work out any padding needed before the auth footer. */
1444 pad_len = p->out_data.frag.length % SERVER_NDR_PADDING_SIZE;
1446 pad_len = SERVER_NDR_PADDING_SIZE - pad_len;
1447 DEBUG(10, ("auth pad_len = %u\n",
1448 (unsigned int)pad_len));
1451 status = dcerpc_push_dcerpc_auth(pkt,
1452 auth_info.auth_type,
1453 auth_info.auth_level,
1455 1, /* auth_context_id */
1458 if (!NT_STATUS_IS_OK(status)) {
1459 DEBUG(0, ("Marshalling of dcerpc_auth failed.\n"));
1464 /* Now that we have the auth len store it into the right place in
1465 * the dcerpc header */
1466 dcerpc_set_frag_length(&p->out_data.frag,
1467 p->out_data.frag.length +
1468 pad_len + auth_blob.length);
1470 if (auth_resp.length) {
1472 char pad[SERVER_NDR_PADDING_SIZE];
1473 memset(pad, '\0', SERVER_NDR_PADDING_SIZE);
1474 if (!data_blob_append(p->mem_ctx,
1477 DEBUG(0, ("api_pipe_bind_req: failed to add "
1478 "%u bytes of pad data.\n",
1479 (unsigned int)pad_len));
1484 if (!data_blob_append(p->mem_ctx, &p->out_data.frag,
1485 auth_blob.data, auth_blob.length)) {
1486 DEBUG(0, ("Append of auth info failed.\n"));
1492 * Setup the lengths for the initial reply.
1495 p->out_data.data_sent_length = 0;
1496 p->out_data.current_pdu_sent = 0;
1498 TALLOC_FREE(auth_blob.data);
1503 data_blob_free(&p->out_data.frag);
1504 TALLOC_FREE(auth_blob.data);
1505 return setup_bind_nak(p, pkt);
1508 static bool api_rpcTNP(struct pipes_struct *p, struct ncacn_packet *pkt,
1509 const struct api_struct *api_rpc_cmds, int n_cmds,
1510 const struct ndr_syntax_id *syntax);
1512 /****************************************************************************
1513 Find the correct RPC function to call for this request.
1514 If the pipe is authenticated then become the correct UNIX user
1515 before doing the call.
1516 ****************************************************************************/
1518 static bool api_pipe_request(struct pipes_struct *p,
1519 struct ncacn_packet *pkt)
1522 bool changed_user = False;
1523 PIPE_RPC_FNS *pipe_fns;
1525 if (p->pipe_bound &&
1526 ((p->auth.auth_type == DCERPC_AUTH_TYPE_NTLMSSP) ||
1527 (p->auth.auth_type == DCERPC_AUTH_TYPE_KRB5) ||
1528 (p->auth.auth_type == DCERPC_AUTH_TYPE_SPNEGO))) {
1529 if(!become_authenticated_pipe_user(p->session_info)) {
1530 data_blob_free(&p->out_data.rdata);
1533 changed_user = True;
1536 /* get the set of RPC functions for this context */
1538 pipe_fns = find_pipe_fns_by_context(p->contexts,
1539 pkt->u.request.context_id);
1542 TALLOC_CTX *frame = talloc_stackframe();
1544 DEBUG(5, ("Requested %s rpc service\n",
1545 get_pipe_name_from_syntax(talloc_tos(), &pipe_fns->syntax)));
1547 ret = api_rpcTNP(p, pkt, pipe_fns->cmds, pipe_fns->n_cmds,
1553 DEBUG(0, ("No rpc function table associated with context "
1555 pkt->u.request.context_id));
1559 unbecome_authenticated_pipe_user();
1565 /*******************************************************************
1566 Calls the underlying RPC function for a named pipe.
1567 ********************************************************************/
1569 static bool api_rpcTNP(struct pipes_struct *p, struct ncacn_packet *pkt,
1570 const struct api_struct *api_rpc_cmds, int n_cmds,
1571 const struct ndr_syntax_id *syntax)
1576 /* interpret the command */
1577 DEBUG(4,("api_rpcTNP: %s op 0x%x - ",
1578 get_pipe_name_from_syntax(talloc_tos(), syntax),
1579 pkt->u.request.opnum));
1581 if (DEBUGLEVEL >= 50) {
1583 slprintf(name, sizeof(name)-1, "in_%s",
1584 get_pipe_name_from_syntax(talloc_tos(), syntax));
1585 dump_pdu_region(name, pkt->u.request.opnum,
1586 &p->in_data.data, 0,
1587 p->in_data.data.length);
1590 for (fn_num = 0; fn_num < n_cmds; fn_num++) {
1591 if (api_rpc_cmds[fn_num].opnum == pkt->u.request.opnum &&
1592 api_rpc_cmds[fn_num].fn != NULL) {
1593 DEBUG(3, ("api_rpcTNP: rpc command: %s\n",
1594 api_rpc_cmds[fn_num].name));
1599 if (fn_num == n_cmds) {
1601 * For an unknown RPC just return a fault PDU but
1602 * return True to allow RPC's on the pipe to continue
1603 * and not put the pipe into fault state. JRA.
1605 DEBUG(4, ("unknown\n"));
1606 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
1610 offset1 = p->out_data.rdata.length;
1612 DEBUG(6, ("api_rpc_cmds[%d].fn == %p\n",
1613 fn_num, api_rpc_cmds[fn_num].fn));
1614 /* do the actual command */
1615 if(!api_rpc_cmds[fn_num].fn(p)) {
1616 DEBUG(0,("api_rpcTNP: %s: %s failed.\n",
1617 get_pipe_name_from_syntax(talloc_tos(), syntax),
1618 api_rpc_cmds[fn_num].name));
1619 data_blob_free(&p->out_data.rdata);
1623 if (p->bad_handle_fault_state) {
1624 DEBUG(4,("api_rpcTNP: bad handle fault return.\n"));
1625 p->bad_handle_fault_state = False;
1626 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_CONTEXT_MISMATCH));
1630 if (p->rng_fault_state) {
1631 DEBUG(4, ("api_rpcTNP: rng fault return\n"));
1632 p->rng_fault_state = False;
1633 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
1637 if (DEBUGLEVEL >= 50) {
1639 slprintf(name, sizeof(name)-1, "out_%s",
1640 get_pipe_name_from_syntax(talloc_tos(), syntax));
1641 dump_pdu_region(name, pkt->u.request.opnum,
1642 &p->out_data.rdata, offset1,
1643 p->out_data.rdata.length);
1646 DEBUG(5,("api_rpcTNP: called %s successfully\n",
1647 get_pipe_name_from_syntax(talloc_tos(), syntax)));
1649 /* Check for buffer underflow in rpc parsing */
1650 if ((DEBUGLEVEL >= 10) &&
1651 (pkt->frag_length < p->in_data.data.length)) {
1652 DEBUG(10, ("api_rpcTNP: rpc input buffer underflow (parse error?)\n"));
1653 dump_data(10, p->in_data.data.data + pkt->frag_length,
1654 p->in_data.data.length - pkt->frag_length);
1660 /****************************************************************************
1661 Initialise an outgoing packet.
1662 ****************************************************************************/
1664 static bool pipe_init_outgoing_data(struct pipes_struct *p)
1666 output_data *o_data = &p->out_data;
1668 /* Reset the offset counters. */
1669 o_data->data_sent_length = 0;
1670 o_data->current_pdu_sent = 0;
1672 data_blob_free(&o_data->frag);
1674 /* Free any memory in the current return data buffer. */
1675 data_blob_free(&o_data->rdata);
1680 /****************************************************************************
1681 Sets the fault state on incoming packets.
1682 ****************************************************************************/
1684 void set_incoming_fault(struct pipes_struct *p)
1686 data_blob_free(&p->in_data.data);
1687 p->in_data.pdu_needed_len = 0;
1688 p->in_data.pdu.length = 0;
1689 p->fault_state = True;
1690 DEBUG(10, ("set_incoming_fault: Setting fault state on pipe %s\n",
1691 get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
1694 static NTSTATUS dcesrv_auth_request(struct pipe_auth_data *auth,
1695 struct ncacn_packet *pkt,
1699 size_t hdr_size = DCERPC_REQUEST_LENGTH;
1702 DEBUG(10, ("Checking request auth.\n"));
1704 if (pkt->pfc_flags & DCERPC_PFC_FLAG_OBJECT_UUID) {
1708 /* in case of sealing this function will unseal the data in place */
1709 status = dcerpc_check_auth(auth, pkt,
1710 &pkt->u.request.stub_and_verifier,
1713 if (!NT_STATUS_IS_OK(status)) {
1718 /* remove padding and auth trailer,
1719 * this way the caller will get just the data */
1720 if (pkt->auth_length) {
1721 size_t trail_len = pad_len
1722 + DCERPC_AUTH_TRAILER_LENGTH
1724 if (pkt->u.request.stub_and_verifier.length < trail_len) {
1725 return NT_STATUS_INFO_LENGTH_MISMATCH;
1727 pkt->u.request.stub_and_verifier.length -= trail_len;
1730 return NT_STATUS_OK;
1733 /****************************************************************************
1734 Processes a request pdu. This will do auth processing if needed, and
1735 appends the data into the complete stream if the LAST flag is not set.
1736 ****************************************************************************/
1738 static bool process_request_pdu(struct pipes_struct *p, struct ncacn_packet *pkt)
1743 if (!p->pipe_bound) {
1744 DEBUG(0,("process_request_pdu: rpc request with no bind.\n"));
1745 set_incoming_fault(p);
1749 /* Store the opnum */
1750 p->opnum = pkt->u.request.opnum;
1752 status = dcesrv_auth_request(&p->auth, pkt, &p->in_data.pdu);
1753 if (!NT_STATUS_IS_OK(status)) {
1754 DEBUG(0, ("Failed to check packet auth. (%s)\n",
1755 nt_errstr(status)));
1756 set_incoming_fault(p);
1760 data = pkt->u.request.stub_and_verifier;
1763 * Check the data length doesn't go over the 15Mb limit.
1764 * increased after observing a bug in the Windows NT 4.0 SP6a
1765 * spoolsv.exe when the response to a GETPRINTERDRIVER2 RPC
1766 * will not fit in the initial buffer of size 0x1068 --jerry 22/01/2002
1769 if (p->in_data.data.length + data.length > MAX_RPC_DATA_SIZE) {
1770 DEBUG(0, ("process_request_pdu: "
1771 "rpc data buffer too large (%u) + (%u)\n",
1772 (unsigned int)p->in_data.data.length,
1773 (unsigned int)data.length));
1774 set_incoming_fault(p);
1779 * Append the data portion into the buffer and return.
1783 if (!data_blob_append(p->mem_ctx, &p->in_data.data,
1784 data.data, data.length)) {
1785 DEBUG(0, ("Unable to append data size %u "
1786 "to parse buffer of size %u.\n",
1787 (unsigned int)data.length,
1788 (unsigned int)p->in_data.data.length));
1789 set_incoming_fault(p);
1794 if (pkt->pfc_flags & DCERPC_PFC_FLAG_LAST) {
1797 * Ok - we finally have a complete RPC stream.
1798 * Call the rpc command to process it.
1802 * Process the complete data stream here.
1804 if (pipe_init_outgoing_data(p)) {
1805 ret = api_pipe_request(p, pkt);
1814 /****************************************************************************
1815 Processes a finished PDU stored in p->in_data.pdu.
1816 ****************************************************************************/
1818 void process_complete_pdu(struct pipes_struct *p)
1820 struct ncacn_packet *pkt = NULL;
1824 if(p->fault_state) {
1825 DEBUG(10,("process_complete_pdu: pipe %s in fault state.\n",
1826 get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
1830 pkt = talloc(p->mem_ctx, struct ncacn_packet);
1832 DEBUG(0, ("Out of memory!\n"));
1837 * Ensure we're using the corrent endianness for both the
1838 * RPC header flags and the raw data we will be reading from.
1840 if (dcerpc_get_endian_flag(&p->in_data.pdu) & DCERPC_DREP_LE) {
1841 p->endian = RPC_LITTLE_ENDIAN;
1843 p->endian = RPC_BIG_ENDIAN;
1845 DEBUG(10, ("PDU is in %s Endian format!\n", p->endian?"Big":"Little"));
1847 status = dcerpc_pull_ncacn_packet(pkt, &p->in_data.pdu,
1849 if (!NT_STATUS_IS_OK(status)) {
1850 DEBUG(0, ("Failed to unmarshal rpc packet: %s!\n",
1851 nt_errstr(status)));
1855 /* Store the call_id */
1856 p->call_id = pkt->call_id;
1858 DEBUG(10, ("Processing packet type %d\n", (int)pkt->ptype));
1860 switch (pkt->ptype) {
1861 case DCERPC_PKT_REQUEST:
1862 reply = process_request_pdu(p, pkt);
1865 case DCERPC_PKT_PING: /* CL request - ignore... */
1866 DEBUG(0, ("process_complete_pdu: Error. "
1867 "Connectionless packet type %d received on "
1868 "pipe %s.\n", (int)pkt->ptype,
1869 get_pipe_name_from_syntax(talloc_tos(),
1873 case DCERPC_PKT_RESPONSE: /* No responses here. */
1874 DEBUG(0, ("process_complete_pdu: Error. "
1875 "DCERPC_PKT_RESPONSE received from client "
1877 get_pipe_name_from_syntax(talloc_tos(),
1881 case DCERPC_PKT_FAULT:
1882 case DCERPC_PKT_WORKING:
1883 /* CL request - reply to a ping when a call in process. */
1884 case DCERPC_PKT_NOCALL:
1885 /* CL - server reply to a ping call. */
1886 case DCERPC_PKT_REJECT:
1887 case DCERPC_PKT_ACK:
1888 case DCERPC_PKT_CL_CANCEL:
1889 case DCERPC_PKT_FACK:
1890 case DCERPC_PKT_CANCEL_ACK:
1891 DEBUG(0, ("process_complete_pdu: Error. "
1892 "Connectionless packet type %u received on "
1893 "pipe %s.\n", (unsigned int)pkt->ptype,
1894 get_pipe_name_from_syntax(talloc_tos(),
1898 case DCERPC_PKT_BIND:
1900 * We assume that a pipe bind is only in one pdu.
1902 if (pipe_init_outgoing_data(p)) {
1903 reply = api_pipe_bind_req(p, pkt);
1907 case DCERPC_PKT_BIND_ACK:
1908 case DCERPC_PKT_BIND_NAK:
1909 DEBUG(0, ("process_complete_pdu: Error. "
1910 "DCERPC_PKT_BINDACK/DCERPC_PKT_BINDNACK "
1911 "packet type %u received on pipe %s.\n",
1912 (unsigned int)pkt->ptype,
1913 get_pipe_name_from_syntax(talloc_tos(),
1918 case DCERPC_PKT_ALTER:
1920 * We assume that a pipe bind is only in one pdu.
1922 if (pipe_init_outgoing_data(p)) {
1923 reply = api_pipe_alter_context(p, pkt);
1927 case DCERPC_PKT_ALTER_RESP:
1928 DEBUG(0, ("process_complete_pdu: Error. "
1929 "DCERPC_PKT_ALTER_RESP on pipe %s: "
1930 "Should only be server -> client.\n",
1931 get_pipe_name_from_syntax(talloc_tos(),
1935 case DCERPC_PKT_AUTH3:
1937 * The third packet in an auth exchange.
1939 if (pipe_init_outgoing_data(p)) {
1940 reply = api_pipe_bind_auth3(p, pkt);
1944 case DCERPC_PKT_SHUTDOWN:
1945 DEBUG(0, ("process_complete_pdu: Error. "
1946 "DCERPC_PKT_SHUTDOWN on pipe %s: "
1947 "Should only be server -> client.\n",
1948 get_pipe_name_from_syntax(talloc_tos(),
1952 case DCERPC_PKT_CO_CANCEL:
1953 /* For now just free all client data and continue
1955 DEBUG(3,("process_complete_pdu: DCERPC_PKT_CO_CANCEL."
1956 " Abandoning rpc call.\n"));
1957 /* As we never do asynchronous RPC serving, we can
1958 * never cancel a call (as far as I know).
1959 * If we ever did we'd have to send a cancel_ack reply.
1960 * For now, just free all client data and continue
1966 /* Enable this if we're doing async rpc. */
1967 /* We must check the outstanding callid matches. */
1968 if (pipe_init_outgoing_data(p)) {
1969 /* Send a cancel_ack PDU reply. */
1970 /* We should probably check the auth-verifier here. */
1971 reply = setup_cancel_ack_reply(p, pkt);
1976 case DCERPC_PKT_ORPHANED:
1977 /* We should probably check the auth-verifier here.
1978 * For now just free all client data and continue
1980 DEBUG(3, ("process_complete_pdu: DCERPC_PKT_ORPHANED."
1981 " Abandoning rpc call.\n"));
1986 DEBUG(0, ("process_complete_pdu: "
1987 "Unknown rpc type = %u received.\n",
1988 (unsigned int)pkt->ptype));
1994 DEBUG(3,("process_complete_pdu: DCE/RPC fault sent on "
1995 "pipe %s\n", get_pipe_name_from_syntax(talloc_tos(),
1997 set_incoming_fault(p);
1998 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
2002 * Reset the lengths. We're ready for a new pdu.
2004 TALLOC_FREE(p->in_data.pdu.data);
2005 p->in_data.pdu_needed_len = 0;
2006 p->in_data.pdu.length = 0;