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 "../libcli/auth/ntlmssp.h"
38 #define DBGC_CLASS DBGC_RPC_SRV
40 static void free_pipe_ntlmssp_auth_data(struct pipe_auth_data *auth)
42 struct auth_ntlmssp_state *a = auth->a_u.auth_ntlmssp_state;
47 auth->a_u.auth_ntlmssp_state = NULL;
50 static DATA_BLOB generic_session_key(void)
52 return data_blob("SystemLibraryDTC", 16);
55 /*******************************************************************
56 Generate the next PDU to be returned from the data in p->rdata.
58 ********************************************************************/
60 static bool create_next_pdu_ntlmssp(pipes_struct *p)
64 RPC_HDR_RESP hdr_resp;
65 uint32 ss_padding_len = 0;
66 uint32 data_space_available;
71 RPC_HDR_AUTH auth_info;
72 uint8 auth_type, auth_level;
73 struct auth_ntlmssp_state *a = p->auth.a_u.auth_ntlmssp_state;
77 * If we're in the fault state, keep returning fault PDU's until
78 * the pipe gets closed. JRA.
82 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
86 memset((char *)&hdr_resp, '\0', sizeof(hdr_resp));
88 /* Set up rpc header flags. */
89 if (p->out_data.data_sent_length == 0) {
90 hdr_flags = DCERPC_PFC_FLAG_FIRST;
96 * Work out how much we can fit in a single PDU.
99 data_len_left = prs_offset(&p->out_data.rdata) - p->out_data.data_sent_length;
102 * Ensure there really is data left to send.
106 DEBUG(0,("create_next_pdu_ntlmssp: no data left to send !\n"));
110 /* Space available - not including padding. */
111 data_space_available = RPC_MAX_PDU_FRAG_LEN - RPC_HEADER_LEN -
112 RPC_HDR_RESP_LEN - RPC_HDR_AUTH_LEN - NTLMSSP_SIG_SIZE;
115 * The amount we send is the minimum of the available
116 * space and the amount left to send.
119 data_len = MIN(data_len_left, data_space_available);
121 /* Work out any padding alignment requirements. */
122 if ((RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len) % SERVER_NDR_PADDING_SIZE) {
123 ss_padding_len = SERVER_NDR_PADDING_SIZE -
124 ((RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len) % SERVER_NDR_PADDING_SIZE);
125 DEBUG(10,("create_next_pdu_ntlmssp: adding sign/seal padding of %u\n",
127 /* If we're over filling the packet, we need to make space
128 * for the padding at the end of the data. */
129 if (data_len + ss_padding_len > data_space_available) {
130 data_len -= SERVER_NDR_PADDING_SIZE;
135 * Set up the alloc hint. This should be the data left to
139 hdr_resp.alloc_hint = data_len_left;
142 * Work out if this PDU will be the last.
144 if (p->out_data.data_sent_length + data_len >=
145 prs_offset(&p->out_data.rdata)) {
146 hdr_flags |= DCERPC_PFC_FLAG_LAST;
150 * Init the parse struct to point at the outgoing
153 prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
155 status = dcerpc_push_ncacn_packet_header(
156 prs_get_mem_context(&p->out_data.frag),
159 RPC_HEADER_LEN + RPC_HDR_RESP_LEN +
160 data_len + ss_padding_len +
161 RPC_HDR_AUTH_LEN + NTLMSSP_SIG_SIZE,
165 if (!NT_STATUS_IS_OK(status)) {
166 DEBUG(0, ("Failed to marshall RPC Header.\n"));
167 prs_mem_free(&p->out_data.frag);
171 /* Store the header in the data stream. */
172 if (!prs_copy_data_in(&p->out_data.frag,
173 (char *)hdr.data, hdr.length)) {
174 DEBUG(0, ("Out of memory.\n"));
175 prs_mem_free(&p->out_data.frag);
179 if(!smb_io_rpc_hdr_resp("resp", &hdr_resp, &p->out_data.frag, 0)) {
180 DEBUG(0,("create_next_pdu_ntlmssp: failed to marshall RPC_HDR_RESP.\n"));
181 prs_mem_free(&p->out_data.frag);
185 /* Copy the data into the PDU. */
187 if(!prs_append_some_prs_data(&p->out_data.frag, &p->out_data.rdata,
188 p->out_data.data_sent_length, data_len)) {
189 DEBUG(0,("create_next_pdu_ntlmssp: failed to copy %u bytes of data.\n", (unsigned int)data_len));
190 prs_mem_free(&p->out_data.frag);
194 /* Copy the sign/seal padding data. */
195 if (ss_padding_len) {
196 char pad[SERVER_NDR_PADDING_SIZE];
198 memset(pad, '\0', SERVER_NDR_PADDING_SIZE);
199 if (!prs_copy_data_in(&p->out_data.frag, pad,
201 DEBUG(0,("create_next_pdu_ntlmssp: failed to add %u bytes of pad data.\n",
202 (unsigned int)ss_padding_len));
203 prs_mem_free(&p->out_data.frag);
209 /* Now write out the auth header and null blob. */
210 if (p->auth.auth_type == PIPE_AUTH_TYPE_NTLMSSP) {
211 auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
213 auth_type = DCERPC_AUTH_TYPE_SPNEGO;
215 if (p->auth.auth_level == DCERPC_AUTH_LEVEL_PRIVACY) {
216 auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
218 auth_level = DCERPC_AUTH_LEVEL_INTEGRITY;
221 init_rpc_hdr_auth(&auth_info, auth_type, auth_level, ss_padding_len, 1 /* context id. */);
223 if (!smb_io_rpc_hdr_auth("hdr_auth", &auth_info,
224 &p->out_data.frag, 0)) {
225 DEBUG(0,("create_next_pdu_ntlmssp: failed to marshall RPC_HDR_AUTH.\n"));
226 prs_mem_free(&p->out_data.frag);
230 /* Generate the sign blob. */
232 frame = talloc_stackframe();
233 switch (p->auth.auth_level) {
234 case DCERPC_AUTH_LEVEL_PRIVACY:
235 /* Data portion is encrypted. */
236 status = auth_ntlmssp_seal_packet(
238 (uint8_t *)prs_data_p(&p->out_data.frag)
239 + RPC_HEADER_LEN + RPC_HDR_RESP_LEN,
240 data_len + ss_padding_len,
241 (unsigned char *)prs_data_p(&p->out_data.frag),
242 (size_t)prs_offset(&p->out_data.frag),
244 if (!NT_STATUS_IS_OK(status)) {
246 prs_mem_free(&p->out_data.frag);
250 case DCERPC_AUTH_LEVEL_INTEGRITY:
251 /* Data is signed. */
252 status = auth_ntlmssp_sign_packet(
254 (unsigned char *)prs_data_p(&p->out_data.frag)
255 + RPC_HEADER_LEN + RPC_HDR_RESP_LEN,
256 data_len + ss_padding_len,
257 (unsigned char *)prs_data_p(&p->out_data.frag),
258 (size_t)prs_offset(&p->out_data.frag),
260 if (!NT_STATUS_IS_OK(status)) {
262 prs_mem_free(&p->out_data.frag);
268 prs_mem_free(&p->out_data.frag);
272 /* Append the auth blob. */
273 if (!prs_copy_data_in(&p->out_data.frag, (char *)auth_blob.data,
275 DEBUG(0,("create_next_pdu_ntlmssp: failed to add %u bytes auth blob.\n",
276 (unsigned int)NTLMSSP_SIG_SIZE));
278 prs_mem_free(&p->out_data.frag);
284 * Setup the counts for this PDU.
287 p->out_data.data_sent_length += data_len;
288 p->out_data.current_pdu_sent = 0;
293 /*******************************************************************
294 Generate the next PDU to be returned from the data in p->rdata.
295 Return an schannel authenticated fragment.
296 ********************************************************************/
298 static bool create_next_pdu_schannel(pipes_struct *p)
302 RPC_HDR_RESP hdr_resp;
303 uint32 ss_padding_len = 0;
305 uint32 data_space_available;
306 uint32 data_len_left;
311 * If we're in the fault state, keep returning fault PDU's until
312 * the pipe gets closed. JRA.
316 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
320 memset((char *)&hdr_resp, '\0', sizeof(hdr_resp));
322 /* Set up rpc header flags. */
323 if (p->out_data.data_sent_length == 0) {
324 hdr_flags = DCERPC_PFC_FLAG_FIRST;
330 * Work out how much we can fit in a single PDU.
333 data_len_left = prs_offset(&p->out_data.rdata) - p->out_data.data_sent_length;
336 * Ensure there really is data left to send.
340 DEBUG(0,("create_next_pdu_schannel: no data left to send !\n"));
344 /* Space available - not including padding. */
345 data_space_available = RPC_MAX_PDU_FRAG_LEN - RPC_HEADER_LEN
346 - RPC_HDR_RESP_LEN - RPC_HDR_AUTH_LEN
347 - RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN;
350 * The amount we send is the minimum of the available
351 * space and the amount left to send.
354 data_len = MIN(data_len_left, data_space_available);
356 /* Work out any padding alignment requirements. */
357 if ((RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len) % SERVER_NDR_PADDING_SIZE) {
358 ss_padding_len = SERVER_NDR_PADDING_SIZE -
359 ((RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len) % SERVER_NDR_PADDING_SIZE);
360 DEBUG(10,("create_next_pdu_schannel: adding sign/seal padding of %u\n",
362 /* If we're over filling the packet, we need to make space
363 * for the padding at the end of the data. */
364 if (data_len + ss_padding_len > data_space_available) {
365 data_len -= SERVER_NDR_PADDING_SIZE;
370 * Set up the alloc hint. This should be the data left to
374 hdr_resp.alloc_hint = data_len_left;
377 * Work out if this PDU will be the last.
379 if (p->out_data.data_sent_length + data_len >=
380 prs_offset(&p->out_data.rdata)) {
381 hdr_flags |= DCERPC_PFC_FLAG_LAST;
385 * Init the parse struct to point at the outgoing
388 prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
390 status = dcerpc_push_ncacn_packet_header(
391 prs_get_mem_context(&p->out_data.frag),
394 RPC_HEADER_LEN + RPC_HDR_RESP_LEN +
395 data_len + ss_padding_len +
397 RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN,
398 RPC_AUTH_SCHANNEL_SIGN_OR_SEAL_CHK_LEN,
401 if (!NT_STATUS_IS_OK(status)) {
402 DEBUG(0, ("Failed to marshall RPC Header.\n"));
403 prs_mem_free(&p->out_data.frag);
407 /* Store the header in the data stream. */
408 if (!prs_copy_data_in(&p->out_data.frag,
409 (char *)hdr.data, hdr.length)) {
410 DEBUG(0, ("Out of memory.\n"));
411 prs_mem_free(&p->out_data.frag);
415 if(!smb_io_rpc_hdr_resp("resp", &hdr_resp, &p->out_data.frag, 0)) {
416 DEBUG(0,("create_next_pdu_schannel: failed to marshall RPC_HDR_RESP.\n"));
417 prs_mem_free(&p->out_data.frag);
421 /* Store the current offset. */
422 data_pos = prs_offset(&p->out_data.frag);
424 /* Copy the data into the PDU. */
426 if(!prs_append_some_prs_data(&p->out_data.frag, &p->out_data.rdata,
427 p->out_data.data_sent_length, data_len)) {
428 DEBUG(0,("create_next_pdu_schannel: failed to copy %u bytes of data.\n", (unsigned int)data_len));
429 prs_mem_free(&p->out_data.frag);
433 /* Copy the sign/seal padding data. */
434 if (ss_padding_len) {
435 char pad[SERVER_NDR_PADDING_SIZE];
436 memset(pad, '\0', SERVER_NDR_PADDING_SIZE);
437 if (!prs_copy_data_in(&p->out_data.frag, pad,
439 DEBUG(0,("create_next_pdu_schannel: failed to add %u bytes of pad data.\n", (unsigned int)ss_padding_len));
440 prs_mem_free(&p->out_data.frag);
447 * Schannel processing.
449 RPC_HDR_AUTH auth_info;
453 /* Check it's the type of reply we were expecting to decode */
455 init_rpc_hdr_auth(&auth_info,
456 DCERPC_AUTH_TYPE_SCHANNEL,
457 p->auth.auth_level == DCERPC_AUTH_LEVEL_PRIVACY ?
458 DCERPC_AUTH_LEVEL_PRIVACY : DCERPC_AUTH_LEVEL_INTEGRITY,
461 if (!smb_io_rpc_hdr_auth("hdr_auth", &auth_info,
462 &p->out_data.frag, 0)) {
463 DEBUG(0,("create_next_pdu_schannel: failed to marshall RPC_HDR_AUTH.\n"));
464 prs_mem_free(&p->out_data.frag);
468 data = (uint8_t *)prs_data_p(&p->out_data.frag) + data_pos;
470 switch (p->auth.auth_level) {
471 case DCERPC_AUTH_LEVEL_PRIVACY:
472 status = netsec_outgoing_packet(p->auth.a_u.schannel_auth,
476 data_len + ss_padding_len,
479 case DCERPC_AUTH_LEVEL_INTEGRITY:
480 status = netsec_outgoing_packet(p->auth.a_u.schannel_auth,
484 data_len + ss_padding_len,
488 status = NT_STATUS_INTERNAL_ERROR;
492 if (!NT_STATUS_IS_OK(status)) {
493 DEBUG(0,("create_next_pdu_schannel: failed to process packet: %s\n",
495 prs_mem_free(&p->out_data.frag);
499 /* Finally marshall the blob. */
501 if (DEBUGLEVEL >= 10) {
502 dump_NL_AUTH_SIGNATURE(talloc_tos(), &blob);
505 if (!prs_copy_data_in(&p->out_data.frag, (const char *)blob.data, blob.length)) {
506 prs_mem_free(&p->out_data.frag);
512 * Setup the counts for this PDU.
515 p->out_data.data_sent_length += data_len;
516 p->out_data.current_pdu_sent = 0;
521 /*******************************************************************
522 Generate the next PDU to be returned from the data in p->rdata.
523 No authentication done.
524 ********************************************************************/
526 static bool create_next_pdu_noauth(pipes_struct *p)
531 RPC_HDR_RESP hdr_resp;
533 uint32 data_space_available;
534 uint32 data_len_left;
537 * If we're in the fault state, keep returning fault PDU's until
538 * the pipe gets closed. JRA.
542 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
546 memset((char *)&hdr_resp, '\0', sizeof(hdr_resp));
548 /* Set up rpc header flags. */
549 if (p->out_data.data_sent_length == 0) {
550 hdr_flags = DCERPC_PFC_FLAG_FIRST;
556 * Work out how much we can fit in a single PDU.
559 data_len_left = prs_offset(&p->out_data.rdata) - p->out_data.data_sent_length;
562 * Ensure there really is data left to send.
566 DEBUG(0,("create_next_pdu_noath: no data left to send !\n"));
570 data_space_available = RPC_MAX_PDU_FRAG_LEN - RPC_HEADER_LEN
574 * The amount we send is the minimum of the available
575 * space and the amount left to send.
578 data_len = MIN(data_len_left, data_space_available);
581 * Set up the alloc hint. This should be the data left to
585 hdr_resp.alloc_hint = data_len_left;
588 * Work out if this PDU will be the last.
590 if(p->out_data.data_sent_length + data_len >= prs_offset(&p->out_data.rdata)) {
591 hdr_flags |= DCERPC_PFC_FLAG_LAST;
595 * Init the parse struct to point at the outgoing
598 prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
600 status = dcerpc_push_ncacn_packet_header(
601 prs_get_mem_context(&p->out_data.frag),
604 RPC_HEADER_LEN + RPC_HDR_RESP_LEN + data_len,
608 if (!NT_STATUS_IS_OK(status)) {
609 DEBUG(0, ("Failed to marshall RPC Header.\n"));
610 prs_mem_free(&p->out_data.frag);
614 /* Store the header in the data stream. */
615 if (!prs_copy_data_in(&p->out_data.frag,
616 (char *)hdr.data, hdr.length)) {
617 DEBUG(0, ("Out of memory.\n"));
618 prs_mem_free(&p->out_data.frag);
622 if(!smb_io_rpc_hdr_resp("resp", &hdr_resp, &p->out_data.frag, 0)) {
623 DEBUG(0,("create_next_pdu_noath: failed to marshall RPC_HDR_RESP.\n"));
624 prs_mem_free(&p->out_data.frag);
628 /* Copy the data into the PDU. */
630 if(!prs_append_some_prs_data(&p->out_data.frag, &p->out_data.rdata,
631 p->out_data.data_sent_length, data_len)) {
632 DEBUG(0,("create_next_pdu_noauth: failed to copy %u bytes of data.\n", (unsigned int)data_len));
633 prs_mem_free(&p->out_data.frag);
638 * Setup the counts for this PDU.
641 p->out_data.data_sent_length += data_len;
642 p->out_data.current_pdu_sent = 0;
647 /*******************************************************************
648 Generate the next PDU to be returned from the data in p->rdata.
649 ********************************************************************/
651 bool create_next_pdu(pipes_struct *p)
653 switch(p->auth.auth_level) {
654 case DCERPC_AUTH_LEVEL_NONE:
655 case DCERPC_AUTH_LEVEL_CONNECT:
656 /* This is incorrect for auth level connect. Fixme. JRA */
657 return create_next_pdu_noauth(p);
660 switch(p->auth.auth_type) {
661 case PIPE_AUTH_TYPE_NTLMSSP:
662 case PIPE_AUTH_TYPE_SPNEGO_NTLMSSP:
663 return create_next_pdu_ntlmssp(p);
664 case PIPE_AUTH_TYPE_SCHANNEL:
665 return create_next_pdu_schannel(p);
671 DEBUG(0,("create_next_pdu: invalid internal auth level %u / type %u",
672 (unsigned int)p->auth.auth_level,
673 (unsigned int)p->auth.auth_type));
677 /*******************************************************************
678 Process an NTLMSSP authentication response.
679 If this function succeeds, the user has been authenticated
680 and their domain, name and calling workstation stored in
682 *******************************************************************/
684 static bool pipe_ntlmssp_verify_final(pipes_struct *p, DATA_BLOB *p_resp_blob)
686 DATA_BLOB session_key, reply;
688 struct auth_ntlmssp_state *a = p->auth.a_u.auth_ntlmssp_state;
691 DEBUG(5,("pipe_ntlmssp_verify_final: pipe %s checking user details\n",
692 get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
696 /* this has to be done as root in order to verify the password */
698 status = auth_ntlmssp_update(a, *p_resp_blob, &reply);
701 /* Don't generate a reply. */
702 data_blob_free(&reply);
704 if (!NT_STATUS_IS_OK(status)) {
708 /* Finally - if the pipe negotiated integrity (sign) or privacy (seal)
709 ensure the underlying NTLMSSP flags are also set. If not we should
712 if (p->auth.auth_level == DCERPC_AUTH_LEVEL_INTEGRITY) {
713 if (!auth_ntlmssp_negotiated_sign(a)) {
714 DEBUG(0,("pipe_ntlmssp_verify_final: pipe %s : packet integrity requested "
715 "but client declined signing.\n",
716 get_pipe_name_from_syntax(talloc_tos(),
721 if (p->auth.auth_level == DCERPC_AUTH_LEVEL_PRIVACY) {
722 if (!auth_ntlmssp_negotiated_seal(a)) {
723 DEBUG(0,("pipe_ntlmssp_verify_final: pipe %s : packet privacy requested "
724 "but client declined sealing.\n",
725 get_pipe_name_from_syntax(talloc_tos(),
731 DEBUG(5, ("pipe_ntlmssp_verify_final: OK: user: %s domain: %s "
733 auth_ntlmssp_get_username(a),
734 auth_ntlmssp_get_domain(a),
735 auth_ntlmssp_get_client(a)));
737 TALLOC_FREE(p->server_info);
739 status = auth_ntlmssp_server_info(p, a, &p->server_info);
740 if (!NT_STATUS_IS_OK(status)) {
741 DEBUG(0, ("auth_ntlmssp_server_info failed to obtain the server info for authenticated user: %s\n",
746 if (p->server_info->ptok == NULL) {
747 DEBUG(1,("Error: Authmodule failed to provide nt_user_token\n"));
752 * We're an authenticated bind over smb, so the session key needs to
753 * be set to "SystemLibraryDTC". Weird, but this is what Windows
754 * does. See the RPC-SAMBA3SESSIONKEY.
757 session_key = generic_session_key();
758 if (session_key.data == NULL) {
762 ret = server_info_set_session_key(p->server_info, session_key);
764 data_blob_free(&session_key);
769 /*******************************************************************
770 This is the "stage3" NTLMSSP response after a bind request and reply.
771 *******************************************************************/
773 bool api_pipe_bind_auth3(pipes_struct *p, struct ncacn_packet *pkt)
775 struct dcerpc_auth auth_info;
776 uint32_t auth_len = pkt->auth_length;
779 DEBUG(5,("api_pipe_bind_auth3: decode request. %d\n", __LINE__));
782 DEBUG(0,("api_pipe_bind_auth3: No auth field sent !\n"));
786 /* Ensure there's enough data for an authenticated request. */
787 if (RPC_HEADER_LEN + RPC_HDR_AUTH_LEN + auth_len >
789 DEBUG(0,("api_pipe_ntlmssp_auth_process: auth_len "
790 "%u is too large.\n",
791 (unsigned int)auth_len ));
796 * Decode the authentication verifier response.
799 status = dcerpc_pull_dcerpc_auth(pkt,
800 &pkt->u.auth3.auth_info,
802 if (!NT_STATUS_IS_OK(status)) {
803 DEBUG(0, ("Failed to unmarshall dcerpc_auth.\n"));
807 /* We must NEVER look at auth_info->auth_pad_len here,
808 * as old Samba client code gets it wrong and sends it
812 if (auth_info.auth_type != DCERPC_AUTH_TYPE_NTLMSSP) {
813 DEBUG(0,("api_pipe_bind_auth3: incorrect auth type (%u).\n",
814 (unsigned int)auth_info.auth_type ));
819 * The following call actually checks the challenge/response data.
820 * for correctness against the given DOMAIN\user name.
823 if (!pipe_ntlmssp_verify_final(p, &auth_info.credentials)) {
827 p->pipe_bound = True;
833 free_pipe_ntlmssp_auth_data(&p->auth);
834 p->auth.a_u.auth_ntlmssp_state = NULL;
839 /*******************************************************************
840 Marshall a bind_nak pdu.
841 *******************************************************************/
843 static bool setup_bind_nak(pipes_struct *p, struct ncacn_packet *pkt)
846 union dcerpc_payload u;
849 /* Free any memory in the current return data buffer. */
850 prs_mem_free(&p->out_data.rdata);
853 * Marshall directly into the outgoing PDU space. We
854 * must do this as we need to set to the bind response
855 * header and are never sending more than one PDU here.
858 prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
861 * Initialize a bind_nak header.
866 u.bind_nak.reject_reason = 0;
868 status = dcerpc_push_ncacn_packet(p->mem_ctx,
870 DCERPC_PFC_FLAG_FIRST |
871 DCERPC_PFC_FLAG_LAST,
876 if (!NT_STATUS_IS_OK(status)) {
877 prs_mem_free(&p->out_data.frag);
881 if (!prs_copy_data_in(&p->out_data.frag,
882 (char *)blob.data, blob.length)) {
883 prs_mem_free(&p->out_data.frag);
887 p->out_data.data_sent_length = 0;
888 p->out_data.current_pdu_sent = 0;
890 if (p->auth.auth_data_free_func) {
891 (*p->auth.auth_data_free_func)(&p->auth);
893 p->auth.auth_level = DCERPC_AUTH_LEVEL_NONE;
894 p->auth.auth_type = PIPE_AUTH_TYPE_NONE;
895 p->pipe_bound = False;
900 /*******************************************************************
901 Marshall a fault pdu.
902 *******************************************************************/
904 bool setup_fault_pdu(pipes_struct *p, NTSTATUS fault_status)
907 union dcerpc_payload u;
910 /* Free any memory in the current return data buffer. */
911 prs_mem_free(&p->out_data.rdata);
914 * Marshall directly into the outgoing PDU space. We
915 * must do this as we need to set to the bind response
916 * header and are never sending more than one PDU here.
919 prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
922 * Initialize a fault header.
927 u.fault.status = NT_STATUS_V(fault_status);
928 u.fault._pad = data_blob_talloc_zero(p->mem_ctx, 4);
930 status = dcerpc_push_ncacn_packet(p->mem_ctx,
932 DCERPC_PFC_FLAG_FIRST |
933 DCERPC_PFC_FLAG_LAST |
934 DCERPC_PFC_FLAG_DID_NOT_EXECUTE,
939 if (!NT_STATUS_IS_OK(status)) {
940 prs_mem_free(&p->out_data.frag);
944 if (!prs_copy_data_in(&p->out_data.frag,
945 (char *)blob.data, blob.length)) {
946 prs_mem_free(&p->out_data.frag);
950 p->out_data.data_sent_length = 0;
951 p->out_data.current_pdu_sent = 0;
956 /*******************************************************************
957 Ensure a bind request has the correct abstract & transfer interface.
958 Used to reject unknown binds from Win2k.
959 *******************************************************************/
961 static bool check_bind_req(struct pipes_struct *p,
962 struct ndr_syntax_id* abstract,
963 struct ndr_syntax_id* transfer,
966 struct pipe_rpc_fns *context_fns;
968 DEBUG(3,("check_bind_req for %s\n",
969 get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
971 /* we have to check all now since win2k introduced a new UUID on the lsaprpc pipe */
972 if (rpc_srv_pipe_exists_by_id(abstract) &&
973 ndr_syntax_id_equal(transfer, &ndr_transfer_syntax)) {
974 DEBUG(3, ("check_bind_req: \\PIPE\\%s -> \\PIPE\\%s\n",
975 rpc_srv_get_pipe_cli_name(abstract),
976 rpc_srv_get_pipe_srv_name(abstract)));
981 context_fns = SMB_MALLOC_P(struct pipe_rpc_fns);
982 if (context_fns == NULL) {
983 DEBUG(0,("check_bind_req: malloc() failed!\n"));
987 context_fns->n_cmds = rpc_srv_get_pipe_num_cmds(abstract);
988 context_fns->cmds = rpc_srv_get_pipe_cmds(abstract);
989 context_fns->context_id = context_id;
991 /* add to the list of open contexts */
993 DLIST_ADD( p->contexts, context_fns );
999 * Is a named pipe known?
1000 * @param[in] cli_filename The pipe name requested by the client
1001 * @result Do we want to serve this?
1003 bool is_known_pipename(const char *cli_filename, struct ndr_syntax_id *syntax)
1005 const char *pipename = cli_filename;
1008 if (strnequal(pipename, "\\PIPE\\", 6)) {
1012 if (*pipename == '\\') {
1016 if (lp_disable_spoolss() && strequal(pipename, "spoolss")) {
1017 DEBUG(10, ("refusing spoolss access\n"));
1021 if (rpc_srv_get_pipe_interface_by_cli_name(pipename, syntax)) {
1025 status = smb_probe_module("rpc", pipename);
1026 if (!NT_STATUS_IS_OK(status)) {
1027 DEBUG(10, ("is_known_pipename: %s unknown\n", cli_filename));
1030 DEBUG(10, ("is_known_pipename: %s loaded dynamically\n", pipename));
1033 * Scan the list again for the interface id
1035 if (rpc_srv_get_pipe_interface_by_cli_name(pipename, syntax)) {
1039 DEBUG(10, ("is_known_pipename: pipe %s did not register itself!\n",
1045 /*******************************************************************
1046 Handle a SPNEGO krb5 bind auth.
1047 *******************************************************************/
1049 static bool pipe_spnego_auth_bind_kerberos(pipes_struct *p,
1050 TALLOC_CTX *mem_ctx,
1051 struct dcerpc_auth *pauth_info,
1052 DATA_BLOB *psecblob,
1053 DATA_BLOB *response)
1058 /*******************************************************************
1059 Handle the first part of a SPNEGO bind auth.
1060 *******************************************************************/
1062 static bool pipe_spnego_auth_bind_negotiate(pipes_struct *p,
1063 TALLOC_CTX *mem_ctx,
1064 struct dcerpc_auth *pauth_info,
1065 DATA_BLOB *response)
1069 char *OIDs[ASN1_MAX_OIDS];
1072 bool got_kerberos_mechanism = false;
1073 struct auth_ntlmssp_state *a = NULL;
1075 ZERO_STRUCT(secblob);
1078 if (pauth_info->credentials.data[0] != ASN1_APPLICATION(0)) {
1082 /* parse out the OIDs and the first sec blob */
1083 if (!parse_negTokenTarg(pauth_info->credentials, OIDs, &secblob)) {
1084 DEBUG(0,("pipe_spnego_auth_bind_negotiate: Failed to parse the security blob.\n"));
1088 if (strcmp(OID_KERBEROS5, OIDs[0]) == 0 || strcmp(OID_KERBEROS5_OLD, OIDs[0]) == 0) {
1089 got_kerberos_mechanism = true;
1092 for (i=0;OIDs[i];i++) {
1093 DEBUG(3,("pipe_spnego_auth_bind_negotiate: Got OID %s\n", OIDs[i]));
1094 TALLOC_FREE(OIDs[i]);
1096 DEBUG(3,("pipe_spnego_auth_bind_negotiate: Got secblob of size %lu\n", (unsigned long)secblob.length));
1098 if ( got_kerberos_mechanism && ((lp_security()==SEC_ADS) || USE_KERBEROS_KEYTAB) ) {
1100 ret = pipe_spnego_auth_bind_kerberos(p, mem_ctx, pauth_info,
1101 &secblob, response);
1102 data_blob_free(&secblob);
1106 if (p->auth.auth_type == PIPE_AUTH_TYPE_SPNEGO_NTLMSSP && p->auth.a_u.auth_ntlmssp_state) {
1107 /* Free any previous auth type. */
1108 free_pipe_ntlmssp_auth_data(&p->auth);
1111 if (!got_kerberos_mechanism) {
1112 /* Initialize the NTLM engine. */
1113 status = auth_ntlmssp_start(&a);
1114 if (!NT_STATUS_IS_OK(status)) {
1118 switch (pauth_info->auth_level) {
1119 case DCERPC_AUTH_LEVEL_INTEGRITY:
1120 auth_ntlmssp_want_sign(a);
1122 case DCERPC_AUTH_LEVEL_PRIVACY:
1123 auth_ntlmssp_want_seal(a);
1129 * Pass the first security blob of data to it.
1130 * This can return an error or NT_STATUS_MORE_PROCESSING_REQUIRED
1131 * which means we need another packet to complete the bind.
1134 status = auth_ntlmssp_update(a, secblob, &chal);
1136 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1137 DEBUG(3,("pipe_spnego_auth_bind_negotiate: auth_ntlmssp_update failed.\n"));
1141 /* Generate the response blob we need for step 2 of the bind. */
1142 *response = spnego_gen_auth_response(&chal, status, OID_NTLMSSP);
1145 * SPNEGO negotiate down to NTLMSSP. The subsequent
1146 * code to process follow-up packets is not complete
1149 *response = spnego_gen_auth_response(NULL,
1150 NT_STATUS_MORE_PROCESSING_REQUIRED,
1154 /* Make sure data is bound to the memctx, to be freed the caller */
1155 talloc_steal(mem_ctx, response->data);
1157 /* auth_pad_len will be handled by the caller */
1159 p->auth.a_u.auth_ntlmssp_state = a;
1160 p->auth.auth_data_free_func = &free_pipe_ntlmssp_auth_data;
1161 p->auth.auth_type = PIPE_AUTH_TYPE_SPNEGO_NTLMSSP;
1163 data_blob_free(&secblob);
1164 data_blob_free(&chal);
1166 /* We can't set pipe_bound True yet - we need an RPC_ALTER_CONTEXT response packet... */
1171 data_blob_free(&secblob);
1172 data_blob_free(&chal);
1174 p->auth.a_u.auth_ntlmssp_state = NULL;
1179 /*******************************************************************
1180 Handle the second part of a SPNEGO bind auth.
1181 *******************************************************************/
1183 static bool pipe_spnego_auth_bind_continue(pipes_struct *p,
1184 TALLOC_CTX *mem_ctx,
1185 struct dcerpc_auth *pauth_info,
1186 DATA_BLOB *response)
1188 DATA_BLOB auth_blob;
1189 DATA_BLOB auth_reply;
1190 struct auth_ntlmssp_state *a = p->auth.a_u.auth_ntlmssp_state;
1192 ZERO_STRUCT(auth_blob);
1193 ZERO_STRUCT(auth_reply);
1196 * NB. If we've negotiated down from krb5 to NTLMSSP we'll currently
1197 * fail here as 'a' == NULL.
1199 if (p->auth.auth_type != PIPE_AUTH_TYPE_SPNEGO_NTLMSSP || !a) {
1200 DEBUG(0,("pipe_spnego_auth_bind_continue: not in NTLMSSP auth state.\n"));
1204 if (pauth_info->credentials.data[0] != ASN1_CONTEXT(1)) {
1205 DEBUG(0,("pipe_spnego_auth_bind_continue: invalid SPNEGO blob type.\n"));
1209 if (!spnego_parse_auth(pauth_info->credentials, &auth_blob)) {
1210 DEBUG(0,("pipe_spnego_auth_bind_continue: invalid SPNEGO blob.\n"));
1215 * The following call actually checks the challenge/response data.
1216 * for correctness against the given DOMAIN\user name.
1219 if (!pipe_ntlmssp_verify_final(p, &auth_blob)) {
1223 data_blob_free(&auth_blob);
1225 /* Generate the spnego "accept completed" blob - no incoming data. */
1226 *response = spnego_gen_auth_response(&auth_reply, NT_STATUS_OK, OID_NTLMSSP);
1228 /* Make sure data is bound to the memctx, to be freed the caller */
1229 talloc_steal(mem_ctx, response->data);
1231 data_blob_free(&auth_reply);
1233 p->pipe_bound = True;
1239 data_blob_free(&auth_blob);
1240 data_blob_free(&auth_reply);
1242 free_pipe_ntlmssp_auth_data(&p->auth);
1243 p->auth.a_u.auth_ntlmssp_state = NULL;
1248 /*******************************************************************
1249 Handle an schannel bind auth.
1250 *******************************************************************/
1252 static bool pipe_schannel_auth_bind(pipes_struct *p,
1253 TALLOC_CTX *mem_ctx,
1254 struct dcerpc_auth *auth_info,
1255 DATA_BLOB *response)
1257 struct NL_AUTH_MESSAGE neg;
1258 struct NL_AUTH_MESSAGE reply;
1261 struct netlogon_creds_CredentialState *creds;
1262 DATA_BLOB session_key;
1263 enum ndr_err_code ndr_err;
1265 ndr_err = ndr_pull_struct_blob(
1266 &auth_info->credentials, mem_ctx, &neg,
1267 (ndr_pull_flags_fn_t)ndr_pull_NL_AUTH_MESSAGE);
1268 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1269 DEBUG(0,("pipe_schannel_auth_bind: Could not unmarshal SCHANNEL auth neg\n"));
1273 if (DEBUGLEVEL >= 10) {
1274 NDR_PRINT_DEBUG(NL_AUTH_MESSAGE, &neg);
1277 if (!(neg.Flags & NL_FLAG_OEM_NETBIOS_COMPUTER_NAME)) {
1278 DEBUG(0,("pipe_schannel_auth_bind: Did not receive netbios computer name\n"));
1283 * The neg.oem_netbios_computer.a key here must match the remote computer name
1284 * given in the DOM_CLNT_SRV.uni_comp_name used on all netlogon pipe
1285 * operations that use credentials.
1289 status = schannel_get_creds_state(p, lp_private_dir(),
1290 neg.oem_netbios_computer.a, &creds);
1293 if (!NT_STATUS_IS_OK(status)) {
1294 DEBUG(0, ("pipe_schannel_auth_bind: Attempt to bind using schannel without successful serverauth2\n"));
1298 p->auth.a_u.schannel_auth = talloc(p, struct schannel_state);
1299 if (!p->auth.a_u.schannel_auth) {
1304 p->auth.a_u.schannel_auth->state = SCHANNEL_STATE_START;
1305 p->auth.a_u.schannel_auth->seq_num = 0;
1306 p->auth.a_u.schannel_auth->initiator = false;
1307 p->auth.a_u.schannel_auth->creds = creds;
1310 * JRA. Should we also copy the schannel session key into the pipe session key p->session_key
1311 * here ? We do that for NTLMSSP, but the session key is already set up from the vuser
1312 * struct of the person who opened the pipe. I need to test this further. JRA.
1314 * VL. As we are mapping this to guest set the generic key
1315 * "SystemLibraryDTC" key here. It's a bit difficult to test against
1316 * W2k3, as it does not allow schannel binds against SAMR and LSA
1320 session_key = generic_session_key();
1321 if (session_key.data == NULL) {
1322 DEBUG(0, ("pipe_schannel_auth_bind: Could not alloc session"
1327 ret = server_info_set_session_key(p->server_info, session_key);
1329 data_blob_free(&session_key);
1332 DEBUG(0, ("server_info_set_session_key failed\n"));
1336 /*** SCHANNEL verifier ***/
1338 reply.MessageType = NL_NEGOTIATE_RESPONSE;
1340 reply.Buffer.dummy = 5; /* ??? actually I don't think
1341 * this has any meaning
1344 ndr_err = ndr_push_struct_blob(response, mem_ctx, &reply,
1345 (ndr_push_flags_fn_t)ndr_push_NL_AUTH_MESSAGE);
1346 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1347 DEBUG(0,("Failed to marshall NL_AUTH_MESSAGE.\n"));
1351 if (DEBUGLEVEL >= 10) {
1352 NDR_PRINT_DEBUG(NL_AUTH_MESSAGE, &reply);
1355 DEBUG(10,("pipe_schannel_auth_bind: schannel auth: domain [%s] myname [%s]\n",
1356 neg.oem_netbios_domain.a, neg.oem_netbios_computer.a));
1358 /* We're finished with this bind - no more packets. */
1359 p->auth.auth_data_free_func = NULL;
1360 p->auth.auth_type = PIPE_AUTH_TYPE_SCHANNEL;
1362 p->pipe_bound = True;
1367 /*******************************************************************
1368 Handle an NTLMSSP bind auth.
1369 *******************************************************************/
1371 static bool pipe_ntlmssp_auth_bind(pipes_struct *p,
1372 TALLOC_CTX *mem_ctx,
1373 struct dcerpc_auth *auth_info,
1374 DATA_BLOB *response)
1377 struct auth_ntlmssp_state *a = NULL;
1379 if (strncmp((char *)auth_info->credentials.data, "NTLMSSP", 7) != 0) {
1380 DEBUG(0, ("Failed to read NTLMSSP in blob\n"));
1384 /* We have an NTLMSSP blob. */
1385 status = auth_ntlmssp_start(&a);
1386 if (!NT_STATUS_IS_OK(status)) {
1387 DEBUG(0,("pipe_ntlmssp_auth_bind: auth_ntlmssp_start failed: %s\n",
1388 nt_errstr(status) ));
1392 switch (auth_info->auth_level) {
1393 case DCERPC_AUTH_LEVEL_INTEGRITY:
1394 auth_ntlmssp_want_sign(a);
1396 case DCERPC_AUTH_LEVEL_PRIVACY:
1397 auth_ntlmssp_want_seal(a);
1403 status = auth_ntlmssp_update(a, auth_info->credentials, response);
1404 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1405 DEBUG(0,("pipe_ntlmssp_auth_bind: auth_ntlmssp_update failed: %s\n",
1406 nt_errstr(status) ));
1410 /* Make sure data is bound to the memctx, to be freed the caller */
1411 talloc_steal(mem_ctx, response->data);
1413 p->auth.a_u.auth_ntlmssp_state = a;
1414 p->auth.auth_data_free_func = &free_pipe_ntlmssp_auth_data;
1415 p->auth.auth_type = PIPE_AUTH_TYPE_NTLMSSP;
1417 DEBUG(10,("pipe_ntlmssp_auth_bind: NTLMSSP auth started\n"));
1419 /* We can't set pipe_bound True yet - we need an DCERPC_PKT_AUTH3 response packet... */
1424 free_pipe_ntlmssp_auth_data(&p->auth);
1425 p->auth.a_u.auth_ntlmssp_state = NULL;
1429 /*******************************************************************
1430 Respond to a pipe bind request.
1431 *******************************************************************/
1433 bool api_pipe_bind_req(pipes_struct *p, struct ncacn_packet *pkt)
1435 struct dcerpc_auth auth_info;
1437 unsigned int auth_type = DCERPC_AUTH_TYPE_NONE;
1439 struct ndr_syntax_id id;
1440 union dcerpc_payload u;
1441 struct dcerpc_ack_ctx bind_ack_ctx;
1442 DATA_BLOB auth_resp = data_blob_null;
1443 DATA_BLOB auth_blob = data_blob_null;
1444 DATA_BLOB blob = data_blob_null;
1447 /* No rebinds on a bound pipe - use alter context. */
1448 if (p->pipe_bound) {
1449 DEBUG(2,("api_pipe_bind_req: rejecting bind request on bound "
1451 get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
1452 return setup_bind_nak(p, pkt);
1455 if (pkt->u.bind.num_contexts == 0) {
1456 DEBUG(0, ("api_pipe_bind_req: no rpc contexts around\n"));
1461 * Try and find the correct pipe name to ensure
1462 * that this is a pipe name we support.
1464 id = pkt->u.bind.ctx_list[0].abstract_syntax;
1465 if (rpc_srv_pipe_exists_by_id(&id)) {
1466 DEBUG(3, ("api_pipe_bind_req: \\PIPE\\%s -> \\PIPE\\%s\n",
1467 rpc_srv_get_pipe_cli_name(&id),
1468 rpc_srv_get_pipe_srv_name(&id)));
1470 status = smb_probe_module(
1471 "rpc", get_pipe_name_from_syntax(
1473 &pkt->u.bind.ctx_list[0].abstract_syntax));
1475 if (NT_STATUS_IS_ERR(status)) {
1476 DEBUG(3,("api_pipe_bind_req: Unknown pipe name %s in bind request.\n",
1477 get_pipe_name_from_syntax(
1479 &pkt->u.bind.ctx_list[0].abstract_syntax)));
1481 return setup_bind_nak(p, pkt);
1484 if (rpc_srv_get_pipe_interface_by_cli_name(
1485 get_pipe_name_from_syntax(talloc_tos(),
1488 DEBUG(3, ("api_pipe_bind_req: \\PIPE\\%s -> \\PIPE\\%s\n",
1489 rpc_srv_get_pipe_cli_name(&id),
1490 rpc_srv_get_pipe_srv_name(&id)));
1492 DEBUG(0, ("module %s doesn't provide functions for "
1494 get_pipe_name_from_syntax(talloc_tos(),
1496 get_pipe_name_from_syntax(talloc_tos(),
1498 return setup_bind_nak(p, pkt);
1502 DEBUG(5,("api_pipe_bind_req: make response. %d\n", __LINE__));
1504 if (pkt->u.bind.assoc_group_id != 0) {
1505 assoc_gid = pkt->u.bind.assoc_group_id;
1511 * Marshall directly into the outgoing PDU space. We
1512 * must do this as we need to set to the bind response
1513 * header and are never sending more than one PDU here.
1516 prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
1519 * Create the bind response struct.
1522 /* If the requested abstract synt uuid doesn't match our client pipe,
1523 reject the bind_ack & set the transfer interface synt to all 0's,
1524 ver 0 (observed when NT5 attempts to bind to abstract interfaces
1526 Needed when adding entries to a DACL from NT5 - SK */
1528 if (check_bind_req(p,
1529 &pkt->u.bind.ctx_list[0].abstract_syntax,
1530 &pkt->u.bind.ctx_list[0].transfer_syntaxes[0],
1531 pkt->u.bind.ctx_list[0].context_id)) {
1533 bind_ack_ctx.result = 0;
1534 bind_ack_ctx.reason = 0;
1535 bind_ack_ctx.syntax = pkt->u.bind.ctx_list[0].transfer_syntaxes[0];
1537 p->pipe_bound = False;
1538 /* Rejection reason: abstract syntax not supported */
1539 bind_ack_ctx.result = DCERPC_BIND_PROVIDER_REJECT;
1540 bind_ack_ctx.reason = DCERPC_BIND_REASON_ASYNTAX;
1541 bind_ack_ctx.syntax = null_ndr_syntax_id;
1545 * Check if this is an authenticated bind request.
1547 if (pkt->auth_length) {
1548 /* Quick length check. Won't catch a bad auth footer,
1549 * prevents overrun. */
1551 if (pkt->frag_length < RPC_HEADER_LEN +
1554 DEBUG(0,("api_pipe_bind_req: auth_len (%u) "
1555 "too long for fragment %u.\n",
1556 (unsigned int)pkt->auth_length,
1557 (unsigned int)pkt->frag_length));
1562 * Decode the authentication verifier.
1564 status = dcerpc_pull_dcerpc_auth(pkt,
1565 &pkt->u.bind.auth_info,
1567 if (!NT_STATUS_IS_OK(status)) {
1568 DEBUG(0, ("Unable to unmarshall dcerpc_auth.\n"));
1572 auth_type = auth_info.auth_type;
1574 /* Work out if we have to sign or seal etc. */
1575 switch (auth_info.auth_level) {
1576 case DCERPC_AUTH_LEVEL_INTEGRITY:
1577 p->auth.auth_level = DCERPC_AUTH_LEVEL_INTEGRITY;
1579 case DCERPC_AUTH_LEVEL_PRIVACY:
1580 p->auth.auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
1583 DEBUG(0, ("Unexpected auth level (%u).\n",
1584 (unsigned int)auth_info.auth_level ));
1588 switch (auth_type) {
1589 case DCERPC_AUTH_TYPE_NTLMSSP:
1590 if (!pipe_ntlmssp_auth_bind(p, pkt,
1591 &auth_info, &auth_resp)) {
1597 case DCERPC_AUTH_TYPE_SCHANNEL:
1598 if (!pipe_schannel_auth_bind(p, pkt,
1599 &auth_info, &auth_resp)) {
1604 case DCERPC_AUTH_TYPE_SPNEGO:
1605 if (!pipe_spnego_auth_bind_negotiate(p, pkt,
1606 &auth_info, &auth_resp)) {
1611 case DCERPC_AUTH_TYPE_NONE:
1615 DEBUG(0, ("Unknown auth type %x requested.\n", auth_type));
1620 if (auth_type == DCERPC_AUTH_TYPE_NONE) {
1621 /* Unauthenticated bind request. */
1622 /* We're finished - no more packets. */
1623 p->auth.auth_type = PIPE_AUTH_TYPE_NONE;
1624 /* We must set the pipe auth_level here also. */
1625 p->auth.auth_level = DCERPC_AUTH_LEVEL_NONE;
1626 p->pipe_bound = True;
1627 /* The session key was initialized from the SMB
1628 * session in make_internal_rpc_pipe_p */
1631 ZERO_STRUCT(u.bind_ack);
1632 u.bind_ack.max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
1633 u.bind_ack.max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
1634 u.bind_ack.assoc_group_id = assoc_gid;
1636 /* name has to be \PIPE\xxxxx */
1637 u.bind_ack.secondary_address =
1638 talloc_asprintf(pkt, "\\PIPE\\%s",
1639 rpc_srv_get_pipe_srv_name(&id));
1640 if (!u.bind_ack.secondary_address) {
1641 DEBUG(0, ("Out of memory!\n"));
1644 u.bind_ack.secondary_address_size =
1645 strlen(u.bind_ack.secondary_address) + 1;
1647 u.bind_ack.num_results = 1;
1648 u.bind_ack.ctx_list = &bind_ack_ctx;
1650 /* NOTE: We leave the auth_info empty so we can calculate the padding
1651 * later and then append the auth_info --simo */
1653 status = dcerpc_push_ncacn_packet(pkt, DCERPC_PKT_BIND_ACK,
1654 DCERPC_PFC_FLAG_FIRST |
1655 DCERPC_PFC_FLAG_LAST,
1659 if (!NT_STATUS_IS_OK(status)) {
1660 DEBUG(0, ("Failed to marshall bind_ack packet. (%s)\n",
1661 nt_errstr(status)));
1664 if (auth_resp.length) {
1666 /* Work out any padding needed before the auth footer. */
1667 pad_len = blob.length % SERVER_NDR_PADDING_SIZE;
1669 pad_len = SERVER_NDR_PADDING_SIZE - pad_len;
1670 DEBUG(10, ("auth pad_len = %u\n",
1671 (unsigned int)pad_len));
1674 status = dcerpc_push_dcerpc_auth(pkt,
1676 auth_info.auth_level,
1678 1, /* auth_context_id */
1681 if (!NT_STATUS_IS_OK(status)) {
1682 DEBUG(0, ("Marshalling of dcerpc_auth failed.\n"));
1687 /* Now that we have the auth len store it into the right place in
1688 * the dcerpc header */
1689 dcerpc_set_frag_length(&blob, blob.length + pad_len + auth_blob.length);
1691 /* And finally copy all bits in the output pdu */
1692 if (!prs_copy_data_in(&p->out_data.frag,
1693 (char *)blob.data, blob.length)) {
1694 DEBUG(0, ("Failed to copy data to output buffer.\n"));
1698 if (auth_blob.length) {
1700 char pad[SERVER_NDR_PADDING_SIZE];
1701 memset(pad, '\0', SERVER_NDR_PADDING_SIZE);
1702 if (!prs_copy_data_in(&p->out_data.frag, pad, pad_len)) {
1703 DEBUG(0, ("api_pipe_bind_req: failed to add "
1704 "%u bytes of pad data.\n",
1705 (unsigned int)pad_len));
1710 if (!prs_copy_data_in(&p->out_data.frag,
1711 (char *)auth_blob.data,
1712 auth_blob.length)) {
1713 DEBUG(0, ("Append of auth info failed.\n"));
1719 * Setup the lengths for the initial reply.
1722 p->out_data.data_sent_length = 0;
1723 p->out_data.current_pdu_sent = 0;
1725 TALLOC_FREE(auth_blob.data);
1726 TALLOC_FREE(blob.data);
1731 prs_mem_free(&p->out_data.frag);
1732 TALLOC_FREE(auth_blob.data);
1733 TALLOC_FREE(blob.data);
1734 return setup_bind_nak(p, pkt);
1737 /****************************************************************************
1738 Deal with an alter context call. Can be third part of 3 leg auth request for
1740 ****************************************************************************/
1742 bool api_pipe_alter_context(pipes_struct *p, struct ncacn_packet *pkt)
1744 struct dcerpc_auth auth_info;
1747 union dcerpc_payload u;
1748 struct dcerpc_ack_ctx bind_ack_ctx;
1749 DATA_BLOB auth_resp = data_blob_null;
1750 DATA_BLOB auth_blob = data_blob_null;
1751 DATA_BLOB blob = data_blob_null;
1754 DEBUG(5,("api_pipe_alter_context: make response. %d\n", __LINE__));
1756 if (pkt->u.bind.assoc_group_id != 0) {
1757 assoc_gid = pkt->u.bind.assoc_group_id;
1763 * Marshall directly into the outgoing PDU space. We
1764 * must do this as we need to set to the bind response
1765 * header and are never sending more than one PDU here.
1768 prs_init_empty(&p->out_data.frag, p->mem_ctx, MARSHALL);
1771 * Create the bind response struct.
1774 /* If the requested abstract synt uuid doesn't match our client pipe,
1775 reject the bind_ack & set the transfer interface synt to all 0's,
1776 ver 0 (observed when NT5 attempts to bind to abstract interfaces
1778 Needed when adding entries to a DACL from NT5 - SK */
1780 if (check_bind_req(p,
1781 &pkt->u.bind.ctx_list[0].abstract_syntax,
1782 &pkt->u.bind.ctx_list[0].transfer_syntaxes[0],
1783 pkt->u.bind.ctx_list[0].context_id)) {
1785 bind_ack_ctx.result = 0;
1786 bind_ack_ctx.reason = 0;
1787 bind_ack_ctx.syntax = pkt->u.bind.ctx_list[0].transfer_syntaxes[0];
1789 p->pipe_bound = False;
1790 /* Rejection reason: abstract syntax not supported */
1791 bind_ack_ctx.result = DCERPC_BIND_PROVIDER_REJECT;
1792 bind_ack_ctx.reason = DCERPC_BIND_REASON_ASYNTAX;
1793 bind_ack_ctx.syntax = null_ndr_syntax_id;
1797 * Check if this is an authenticated alter context request.
1799 if (pkt->auth_length) {
1800 /* Quick length check. Won't catch a bad auth footer,
1801 * prevents overrun. */
1803 if (pkt->frag_length < RPC_HEADER_LEN +
1806 DEBUG(0,("api_pipe_alter_context: auth_len (%u) "
1807 "too long for fragment %u.\n",
1808 (unsigned int)pkt->auth_length,
1809 (unsigned int)pkt->frag_length ));
1813 status = dcerpc_pull_dcerpc_auth(pkt,
1814 &pkt->u.bind.auth_info,
1816 if (!NT_STATUS_IS_OK(status)) {
1817 DEBUG(0, ("Unable to unmarshall dcerpc_auth.\n"));
1823 * Currently only the SPNEGO auth type uses the alter ctx
1824 * response in place of the NTLMSSP auth3 type.
1827 if (auth_info.auth_type == DCERPC_AUTH_TYPE_SPNEGO) {
1828 /* We can only finish if the pipe is unbound. */
1829 if (!p->pipe_bound) {
1830 if (!pipe_spnego_auth_bind_continue(p, pkt,
1831 &auth_info, &auth_resp)) {
1841 ZERO_STRUCT(u.alter_resp);
1842 u.alter_resp.max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
1843 u.alter_resp.max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
1844 u.alter_resp.assoc_group_id = assoc_gid;
1846 /* secondary address CAN be NULL
1847 * as the specs say it's ignored.
1848 * It MUST be NULL to have the spoolss working.
1850 u.alter_resp.secondary_address = "";
1851 u.alter_resp.secondary_address_size = 1;
1853 u.alter_resp.num_results = 1;
1854 u.alter_resp.ctx_list = &bind_ack_ctx;
1856 /* NOTE: We leave the auth_info empty so we can calculate the padding
1857 * later and then append the auth_info --simo */
1859 status = dcerpc_push_ncacn_packet(pkt, DCERPC_PKT_ALTER_RESP,
1860 DCERPC_PFC_FLAG_FIRST |
1861 DCERPC_PFC_FLAG_LAST,
1865 if (!NT_STATUS_IS_OK(status)) {
1866 DEBUG(0, ("Failed to marshall bind_ack packet. (%s)\n",
1867 nt_errstr(status)));
1870 if (auth_resp.length) {
1872 /* Work out any padding needed before the auth footer. */
1873 pad_len = blob.length % SERVER_NDR_PADDING_SIZE;
1875 pad_len = SERVER_NDR_PADDING_SIZE - pad_len;
1876 DEBUG(10, ("auth pad_len = %u\n",
1877 (unsigned int)pad_len));
1880 status = dcerpc_push_dcerpc_auth(pkt,
1881 auth_info.auth_type,
1882 auth_info.auth_level,
1884 1, /* auth_context_id */
1887 if (!NT_STATUS_IS_OK(status)) {
1888 DEBUG(0, ("Marshalling of dcerpc_auth failed.\n"));
1893 /* Now that we have the auth len store it into the right place in
1894 * the dcerpc header */
1895 dcerpc_set_frag_length(&blob, blob.length + pad_len + auth_blob.length);
1897 /* And finally copy all bits in the output pdu */
1898 if (!prs_copy_data_in(&p->out_data.frag,
1899 (char *)blob.data, blob.length)) {
1900 DEBUG(0, ("Failed to copy data to output buffer.\n"));
1904 if (auth_resp.length) {
1906 char pad[SERVER_NDR_PADDING_SIZE];
1907 memset(pad, '\0', SERVER_NDR_PADDING_SIZE);
1908 if (!prs_copy_data_in(&p->out_data.frag, pad, pad_len)) {
1909 DEBUG(0, ("api_pipe_bind_req: failed to add "
1910 "%u bytes of pad data.\n",
1911 (unsigned int)pad_len));
1916 if (!prs_copy_data_in(&p->out_data.frag,
1917 (char *)auth_blob.data,
1918 auth_blob.length)) {
1919 DEBUG(0, ("Append of auth info failed.\n"));
1925 * Setup the lengths for the initial reply.
1928 p->out_data.data_sent_length = 0;
1929 p->out_data.current_pdu_sent = 0;
1931 TALLOC_FREE(auth_blob.data);
1932 TALLOC_FREE(blob.data);
1937 prs_mem_free(&p->out_data.frag);
1938 TALLOC_FREE(auth_blob.data);
1939 TALLOC_FREE(blob.data);
1940 return setup_bind_nak(p, pkt);
1943 /****************************************************************************
1944 Find the set of RPC functions associated with this context_id
1945 ****************************************************************************/
1947 static PIPE_RPC_FNS* find_pipe_fns_by_context( PIPE_RPC_FNS *list, uint32 context_id )
1949 PIPE_RPC_FNS *fns = NULL;
1952 DEBUG(0,("find_pipe_fns_by_context: ERROR! No context list for pipe!\n"));
1956 for (fns=list; fns; fns=fns->next ) {
1957 if ( fns->context_id == context_id )
1963 /****************************************************************************
1965 ****************************************************************************/
1967 void free_pipe_rpc_context( PIPE_RPC_FNS *list )
1969 PIPE_RPC_FNS *tmp = list;
1981 static bool api_rpcTNP(pipes_struct *p, struct ncacn_packet *pkt,
1982 const struct api_struct *api_rpc_cmds, int n_cmds);
1984 /****************************************************************************
1985 Find the correct RPC function to call for this request.
1986 If the pipe is authenticated then become the correct UNIX user
1987 before doing the call.
1988 ****************************************************************************/
1990 bool api_pipe_request(pipes_struct *p, struct ncacn_packet *pkt)
1993 bool changed_user = False;
1994 PIPE_RPC_FNS *pipe_fns;
1996 if (p->pipe_bound &&
1997 ((p->auth.auth_type == PIPE_AUTH_TYPE_NTLMSSP) ||
1998 (p->auth.auth_type == PIPE_AUTH_TYPE_SPNEGO_NTLMSSP))) {
1999 if(!become_authenticated_pipe_user(p)) {
2000 prs_mem_free(&p->out_data.rdata);
2003 changed_user = True;
2006 DEBUG(5, ("Requested \\PIPE\\%s\n",
2007 get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
2009 /* get the set of RPC functions for this context */
2011 pipe_fns = find_pipe_fns_by_context(p->contexts,
2012 pkt->u.request.context_id);
2015 TALLOC_CTX *frame = talloc_stackframe();
2016 ret = api_rpcTNP(p, pkt, pipe_fns->cmds, pipe_fns->n_cmds);
2020 DEBUG(0, ("No rpc function table associated with context "
2021 "[%d] on pipe [%s]\n",
2022 pkt->u.request.context_id,
2023 get_pipe_name_from_syntax(talloc_tos(),
2028 unbecome_authenticated_pipe_user();
2034 /*******************************************************************
2035 Calls the underlying RPC function for a named pipe.
2036 ********************************************************************/
2038 static bool api_rpcTNP(pipes_struct *p, struct ncacn_packet *pkt,
2039 const struct api_struct *api_rpc_cmds, int n_cmds)
2042 uint32 offset1, offset2;
2044 /* interpret the command */
2045 DEBUG(4,("api_rpcTNP: %s op 0x%x - ",
2046 get_pipe_name_from_syntax(talloc_tos(), &p->syntax),
2047 pkt->u.request.opnum));
2049 if (DEBUGLEVEL >= 50) {
2051 slprintf(name, sizeof(name)-1, "in_%s",
2052 get_pipe_name_from_syntax(talloc_tos(), &p->syntax));
2053 prs_dump(name, pkt->u.request.opnum, &p->in_data.data);
2056 for (fn_num = 0; fn_num < n_cmds; fn_num++) {
2057 if (api_rpc_cmds[fn_num].opnum == pkt->u.request.opnum &&
2058 api_rpc_cmds[fn_num].fn != NULL) {
2059 DEBUG(3, ("api_rpcTNP: rpc command: %s\n",
2060 api_rpc_cmds[fn_num].name));
2065 if (fn_num == n_cmds) {
2067 * For an unknown RPC just return a fault PDU but
2068 * return True to allow RPC's on the pipe to continue
2069 * and not put the pipe into fault state. JRA.
2071 DEBUG(4, ("unknown\n"));
2072 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
2076 offset1 = prs_offset(&p->out_data.rdata);
2078 DEBUG(6, ("api_rpc_cmds[%d].fn == %p\n",
2079 fn_num, api_rpc_cmds[fn_num].fn));
2080 /* do the actual command */
2081 if(!api_rpc_cmds[fn_num].fn(p)) {
2082 DEBUG(0,("api_rpcTNP: %s: %s failed.\n",
2083 get_pipe_name_from_syntax(talloc_tos(), &p->syntax),
2084 api_rpc_cmds[fn_num].name));
2085 prs_mem_free(&p->out_data.rdata);
2089 if (p->bad_handle_fault_state) {
2090 DEBUG(4,("api_rpcTNP: bad handle fault return.\n"));
2091 p->bad_handle_fault_state = False;
2092 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_CONTEXT_MISMATCH));
2096 if (p->rng_fault_state) {
2097 DEBUG(4, ("api_rpcTNP: rng fault return\n"));
2098 p->rng_fault_state = False;
2099 setup_fault_pdu(p, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR));
2103 offset2 = prs_offset(&p->out_data.rdata);
2104 prs_set_offset(&p->out_data.rdata, offset1);
2105 if (DEBUGLEVEL >= 50) {
2107 slprintf(name, sizeof(name)-1, "out_%s",
2108 get_pipe_name_from_syntax(talloc_tos(), &p->syntax));
2109 prs_dump(name, pkt->u.request.opnum, &p->out_data.rdata);
2111 prs_set_offset(&p->out_data.rdata, offset2);
2113 DEBUG(5,("api_rpcTNP: called %s successfully\n",
2114 get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
2116 /* Check for buffer underflow in rpc parsing */
2118 if ((DEBUGLEVEL >= 10) &&
2119 (prs_offset(&p->in_data.data) != prs_data_size(&p->in_data.data))) {
2120 size_t data_len = prs_data_size(&p->in_data.data) - prs_offset(&p->in_data.data);
2121 char *data = (char *)SMB_MALLOC(data_len);
2123 DEBUG(10, ("api_rpcTNP: rpc input buffer underflow (parse error?)\n"));
2125 prs_uint8s(False, "", &p->in_data.data, 0, (unsigned char *)data, (uint32)data_len);