3 * Unix SMB/Netbios implementation.
5 * RPC Pipe client / server routines
6 * Copyright (C) Andrew Tridgell 1992-1998
7 * Copyright (C) Luke Kenneth Casson Leighton 1996-1998,
8 * Copyright (C) Paul Ashton 1997-1998.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 /* this module apparently provides an implementation of DCE/RPC over a
26 * named pipe (IPC$ connection using SMBtrans). details of DCE/RPC
27 * documentation are available (in on-line form) from the X-Open group.
29 * this module should provide a level of abstraction between SMB
30 * and DCE/RPC, while minimising the amount of mallocs, unnecessary
31 * data copies, and network traffic.
33 * in this version, which takes a "let's learn what's going on and
34 * get something running" approach, there is additional network
35 * traffic generated, but the code should be easier to understand...
37 * ... if you read the docs. or stare at packets for weeks on end.
44 extern int DEBUGLEVEL;
46 static void NTLMSSPcalc_p( pipes_struct *p, unsigned char *data, int len)
48 unsigned char *hash = p->ntlmssp_hash;
49 unsigned char index_i = hash[256];
50 unsigned char index_j = hash[257];
53 for( ind = 0; ind < len; ind++)
59 index_j += hash[index_i];
62 hash[index_i] = hash[index_j];
65 t = hash[index_i] + hash[index_j];
66 data[ind] = data[ind] ^ hash[t];
73 /*******************************************************************
74 turns a DCE/RPC request into a DCE/RPC reply
76 this is where the data really should be split up into an array of
77 headers and data sections.
79 ********************************************************************/
80 BOOL create_rpc_reply(pipes_struct *p,
81 uint32 data_start, uint32 data_end)
84 BOOL auth_verify = IS_BITS_SET_ALL(p->ntlmssp_chal.neg_flags, NTLMSSP_NEGOTIATE_SIGN);
85 BOOL auth_seal = IS_BITS_SET_ALL(p->ntlmssp_chal.neg_flags, NTLMSSP_NEGOTIATE_SEAL);
89 DEBUG(5,("create_rpc_reply: data_start: %d data_end: %d max_tsize: %d\n",
90 data_start, data_end, p->hdr_ba.bba.max_tsize));
92 auth_len = p->hdr.auth_len;
96 DEBUG(10,("create_rpc_reply: auth\n"));
103 prs_init(&p->rhdr , 0x18, 4, 0, False);
104 prs_init(&p->rauth, 1024, 4, 0, False);
105 prs_init(&p->rverf, 0x10, 4, 0, False);
107 p->hdr.pkt_type = RPC_RESPONSE; /* mark header as an rpc response */
109 /* set up rpc header (fragmentation issues) */
112 p->hdr.flags = RPC_FLG_FIRST;
119 p->hdr_resp.alloc_hint = data_end - data_start; /* calculate remaining data to be sent */
121 if (p->hdr_resp.alloc_hint + 0x18 <= p->hdr_ba.bba.max_tsize)
123 p->hdr.flags |= RPC_FLG_LAST;
124 p->hdr.frag_len = p->hdr_resp.alloc_hint + 0x18;
128 p->hdr.frag_len = p->hdr_ba.bba.max_tsize;
133 p->hdr_resp.alloc_hint -= auth_len + 8;
138 data_len = p->hdr.frag_len - auth_len - (auth_verify ? 8 : 0) - 0x18;
142 data_len = p->hdr.frag_len - 0x18;
145 p->rhdr.data->offset.start = 0;
146 p->rhdr.data->offset.end = 0x18;
148 /* store the header in the data stream */
149 smb_io_rpc_hdr ("hdr" , &(p->hdr ), &(p->rhdr), 0);
150 smb_io_rpc_hdr_resp("resp", &(p->hdr_resp), &(p->rhdr), 0);
152 /* don't use rdata: use rdata_i instead, which moves... */
153 /* make a pointer to the rdata data, NOT A COPY */
155 p->rdata_i.data = NULL;
156 prs_init(&p->rdata_i, 0, p->rdata.align, p->rdata.data->margin, p->rdata.io);
157 data = mem_data(&(p->rdata.data), data_start);
158 mem_create(p->rdata_i.data, data, 0, data_len, 0, False);
159 p->rdata_i.offset = data_len;
165 DEBUG(5,("create_rpc_reply: sign: %s seal: %s data %d auth %d\n",
166 BOOLSTR(auth_verify), BOOLSTR(auth_seal), data_len, auth_len));
170 crc32 = crc32_calc_buffer(data_len, data);
171 NTLMSSPcalc_p(p, (uchar*)data, data_len);
174 if (auth_seal || auth_verify)
176 make_rpc_hdr_auth(&p->auth_info, 0x0a, 0x06, 0x08, (auth_verify ? 1 : 0));
177 smb_io_rpc_hdr_auth("hdr_auth", &p->auth_info, &p->rauth, 0);
183 p->ntlmssp_seq_num++;
184 make_rpc_auth_ntlmssp_chk(&p->ntlmssp_chk, NTLMSSP_SIGN_VERSION, crc32, p->ntlmssp_seq_num++);
185 smb_io_rpc_auth_ntlmssp_chk("auth_sign", &(p->ntlmssp_chk), &p->rverf, 0);
186 auth_data = mem_data(&p->rverf.data, 4);
187 NTLMSSPcalc_p(p, (uchar*)auth_data, 12);
191 /* set up the data chain */
194 prs_link(NULL , &p->rhdr , &p->rdata_i);
195 prs_link(&p->rhdr , &p->rdata_i, &p->rauth );
196 prs_link(&p->rdata_i, &p->rauth , &p->rverf );
197 prs_link(&p->rauth , &p->rverf , NULL );
201 prs_link(NULL , &p->rhdr , &p->rdata_i);
202 prs_link(&p->rhdr, &p->rdata_i, NULL );
205 return p->rhdr.data != NULL && p->rhdr.offset == 0x18;
208 static BOOL api_pipe_ntlmssp_verify(pipes_struct *p)
212 struct smb_passwd *smb_pass = NULL;
214 DEBUG(5,("api_pipe_ntlmssp_verify: checking user details\n"));
216 if (p->ntlmssp_resp.hdr_lm_resp.str_str_len == 0) return False;
217 if (p->ntlmssp_resp.hdr_nt_resp.str_str_len == 0) return False;
218 if (p->ntlmssp_resp.hdr_usr .str_str_len == 0) return False;
219 if (p->ntlmssp_resp.hdr_domain .str_str_len == 0) return False;
220 if (p->ntlmssp_resp.hdr_wks .str_str_len == 0) return False;
222 memset(p->user_name, 0, sizeof(p->user_name));
223 memset(p->domain , 0, sizeof(p->domain ));
224 memset(p->wks , 0, sizeof(p->wks ));
226 if (IS_BITS_SET_ALL(p->ntlmssp_chal.neg_flags, NTLMSSP_NEGOTIATE_UNICODE))
228 unibuf_to_ascii(p->user_name, p->ntlmssp_resp.user,
229 MIN(p->ntlmssp_resp.hdr_usr .str_str_len/2,
230 sizeof(p->user_name)-1));
231 unibuf_to_ascii(p->domain , p->ntlmssp_resp.domain,
232 MIN(p->ntlmssp_resp.hdr_domain.str_str_len/2,
233 sizeof(p->domain )-1));
234 unibuf_to_ascii(p->wks , p->ntlmssp_resp.wks,
235 MIN(p->ntlmssp_resp.hdr_wks .str_str_len/2,
240 fstrcpy(p->user_name, p->ntlmssp_resp.user );
241 fstrcpy(p->domain , p->ntlmssp_resp.domain);
242 fstrcpy(p->wks , p->ntlmssp_resp.wks );
245 DEBUG(5,("user: %s domain: %s wks: %s\n", p->user_name, p->domain, p->wks));
247 memcpy(lm_owf, p->ntlmssp_resp.lm_resp, sizeof(lm_owf));
248 memcpy(nt_owf, p->ntlmssp_resp.nt_resp, sizeof(nt_owf));
250 #ifdef DEBUG_PASSWORD
251 DEBUG(100,("lm, nt owfs, chal\n"));
252 dump_data(100, lm_owf, sizeof(lm_owf));
253 dump_data(100, nt_owf, sizeof(nt_owf));
254 dump_data(100, p->ntlmssp_chal.challenge, 8);
257 p->ntlmssp_validated = pass_check_smb(p->user_name, p->domain,
258 (uchar*)p->ntlmssp_chal.challenge,
259 lm_owf, nt_owf, NULL);
260 smb_pass = getsmbpwnam(p->user_name);
263 if (p->ntlmssp_validated && smb_pass != NULL && smb_pass->smb_passwd)
266 NTLMSSPOWFencrypt(smb_pass->smb_passwd, lm_owf, p24);
278 for (ind = 0; ind < 256; ind++)
280 p->ntlmssp_hash[ind] = (unsigned char)ind;
283 for( ind = 0; ind < 256; ind++)
287 j += (p->ntlmssp_hash[ind] + k2[ind%8]);
289 tc = p->ntlmssp_hash[ind];
290 p->ntlmssp_hash[ind] = p->ntlmssp_hash[j];
291 p->ntlmssp_hash[j] = tc;
294 p->ntlmssp_hash[256] = 0;
295 p->ntlmssp_hash[257] = 0;
297 /* NTLMSSPhash(p->ntlmssp_hash, p24); */
298 p->ntlmssp_seq_num = 0;
302 p->ntlmssp_validated = False;
305 return p->ntlmssp_validated;
308 static BOOL api_pipe_ntlmssp(pipes_struct *p, prs_struct *pd)
310 /* receive a negotiate; send a challenge; receive a response */
311 switch (p->auth_verifier.msg_type)
313 case NTLMSSP_NEGOTIATE:
315 smb_io_rpc_auth_ntlmssp_neg("", &p->ntlmssp_neg, pd, 0);
320 smb_io_rpc_auth_ntlmssp_resp("", &p->ntlmssp_resp, pd, 0);
321 if (!api_pipe_ntlmssp_verify(p))
329 /* NTLMSSP expected: unexpected message type */
330 DEBUG(3,("unexpected message type in NTLMSSP %d\n",
331 p->auth_verifier.msg_type));
336 return (pd->offset != 0);
341 char * pipe_clnt_name;
342 char * pipe_srv_name;
343 BOOL (*fn) (pipes_struct *, prs_struct *);
346 static struct api_cmd api_fd_commands[] =
348 { "lsarpc", "lsass", api_ntlsa_rpc },
349 { "samr", "lsass", api_samr_rpc },
350 { "srvsvc", "ntsvcs", api_srvsvc_rpc },
351 { "wkssvc", "ntsvcs", api_wkssvc_rpc },
352 { "svcctl", "ntsvcs", api_svcctl_rpc },
353 { "NETLOGON", "lsass", api_netlog_rpc },
354 { "winreg", "winreg", api_reg_rpc },
358 static BOOL api_pipe_bind_auth_resp(pipes_struct *p, prs_struct *pd)
360 DEBUG(5,("api_pipe_bind_auth_resp: decode request. %d\n", __LINE__));
362 if (p->hdr.auth_len == 0) return False;
364 /* decode the authentication verifier response */
365 smb_io_rpc_hdr_autha("", &p->autha_info, pd, 0);
366 if (pd->offset == 0) return False;
368 if (!rpc_hdr_auth_chk(&(p->auth_info))) return False;
370 smb_io_rpc_auth_verifier("", &p->auth_verifier, pd, 0);
371 if (pd->offset == 0) return False;
373 if (!rpc_auth_verifier_chk(&(p->auth_verifier), "NTLMSSP", NTLMSSP_AUTH)) return False;
375 return api_pipe_ntlmssp(p, pd);
378 static BOOL api_pipe_bind_req(pipes_struct *p, prs_struct *pd)
381 fstring ack_pipe_name;
384 p->ntlmssp_auth = False;
386 DEBUG(5,("api_pipe_bind_req: decode request. %d\n", __LINE__));
388 for (i = 0; api_fd_commands[i].pipe_clnt_name; i++)
390 if (strequal(api_fd_commands[i].pipe_clnt_name, p->name) &&
391 api_fd_commands[i].fn != NULL)
393 DEBUG(3,("api_pipe_bind_req: \\PIPE\\%s -> \\PIPE\\%s\n",
394 api_fd_commands[i].pipe_clnt_name,
395 api_fd_commands[i].pipe_srv_name));
396 fstrcpy(p->pipe_srv_name, api_fd_commands[i].pipe_srv_name);
401 if (api_fd_commands[i].fn == NULL) return False;
403 /* decode the bind request */
404 smb_io_rpc_hdr_rb("", &p->hdr_rb, pd, 0);
406 if (pd->offset == 0) return False;
408 if (p->hdr.auth_len != 0)
410 /* decode the authentication verifier */
411 smb_io_rpc_hdr_auth ("", &p->auth_info , pd, 0);
412 if (pd->offset == 0) return False;
414 p->ntlmssp_auth = p->auth_info.auth_type = 0x0a;
418 smb_io_rpc_auth_verifier("", &p->auth_verifier, pd, 0);
419 if (pd->offset == 0) return False;
421 p->ntlmssp_auth = strequal(p->auth_verifier.signature, "NTLMSSP");
426 if (!api_pipe_ntlmssp(p, pd)) return False;
430 /* name has to be \PIPE\xxxxx */
431 fstrcpy(ack_pipe_name, "\\PIPE\\");
432 fstrcat(ack_pipe_name, p->pipe_srv_name);
434 DEBUG(5,("api_pipe_bind_req: make response. %d\n", __LINE__));
436 prs_init(&(p->rdata), 1024, 4, 0, False);
437 prs_init(&(p->rhdr ), 0x18, 4, 0, False);
438 prs_init(&(p->rauth), 1024, 4, 0, False);
439 prs_init(&(p->rverf), 0x08, 4, 0, False);
440 prs_init(&(p->rntlm), 1024, 4, 0, False);
443 /*** do the bind ack first ***/
452 assoc_gid = p->hdr_rb.bba.assoc_gid;
455 make_rpc_hdr_ba(&p->hdr_ba,
456 p->hdr_rb.bba.max_tsize,
457 p->hdr_rb.bba.max_rsize,
461 &(p->hdr_rb.transfer));
463 smb_io_rpc_hdr_ba("", &p->hdr_ba, &p->rdata, 0);
464 mem_realloc_data(p->rdata.data, p->rdata.offset);
467 /*** now the authentication ***/
473 generate_random_buffer(challenge, 8, False);
475 /*** authentication info ***/
477 make_rpc_hdr_auth(&p->auth_info, 0x0a, 0x06, 0, 1);
478 smb_io_rpc_hdr_auth("", &p->auth_info, &p->rverf, 0);
479 mem_realloc_data(p->rverf.data, p->rverf.offset);
481 /*** NTLMSSP verifier ***/
483 make_rpc_auth_verifier(&p->auth_verifier,
484 "NTLMSSP", NTLMSSP_CHALLENGE);
485 smb_io_rpc_auth_verifier("", &p->auth_verifier, &p->rauth, 0);
486 mem_realloc_data(p->rauth.data, p->rauth.offset);
488 /* NTLMSSP challenge ***/
490 make_rpc_auth_ntlmssp_chal(&p->ntlmssp_chal,
491 0x000082b1, challenge);
492 smb_io_rpc_auth_ntlmssp_chal("", &p->ntlmssp_chal, &p->rntlm, 0);
493 mem_realloc_data(p->rntlm.data, p->rntlm.offset);
497 /*** then do the header, now we know the length ***/
500 make_rpc_hdr(&p->hdr, RPC_BINDACK, RPC_FLG_FIRST | RPC_FLG_LAST,
502 p->rdata.offset + p->rverf.offset + p->rauth.offset + p->rntlm.offset + 0x10,
503 p->rauth.offset + p->rntlm.offset);
505 smb_io_rpc_hdr("", &p->hdr, &p->rhdr, 0);
506 mem_realloc_data(p->rhdr.data, p->rdata.offset);
509 /*** link rpc header, bind acknowledgment and authentication responses ***/
514 prs_link(NULL , &p->rhdr , &p->rdata);
515 prs_link(&p->rhdr , &p->rdata, &p->rverf);
516 prs_link(&p->rdata, &p->rverf, &p->rauth);
517 prs_link(&p->rverf, &p->rauth, &p->rntlm);
518 prs_link(&p->rauth, &p->rntlm, NULL );
522 prs_link(NULL , &p->rhdr , &p->rdata);
523 prs_link(&p->rhdr, &p->rdata, NULL );
530 static BOOL api_pipe_auth_process(pipes_struct *p, prs_struct *pd)
532 BOOL auth_verify = IS_BITS_SET_ALL(p->ntlmssp_chal.neg_flags, NTLMSSP_NEGOTIATE_SIGN);
533 BOOL auth_seal = IS_BITS_SET_ALL(p->ntlmssp_chal.neg_flags, NTLMSSP_NEGOTIATE_SEAL);
539 auth_len = p->hdr.auth_len;
541 if (auth_len != 16 && auth_verify)
546 data_len = p->hdr.frag_len - auth_len - (auth_verify ? 8 : 0) - 0x18;
548 DEBUG(5,("api_pipe_auth_process: sign: %s seal: %s data %d auth %d\n",
549 BOOLSTR(auth_verify), BOOLSTR(auth_seal), data_len, auth_len));
553 char *data = mem_data(&pd->data, pd->offset);
554 DEBUG(5,("api_pipe_auth_process: data %d\n", pd->offset));
555 NTLMSSPcalc_p(p, (uchar*)data, data_len);
556 crc32 = crc32_calc_buffer(data_len, data);
559 /*** skip the data, record the offset so we can restore it again */
560 old_offset = pd->offset;
562 if (auth_seal || auth_verify)
564 pd->offset += data_len;
565 smb_io_rpc_hdr_auth("hdr_auth", &p->auth_info, pd, 0);
570 char *req_data = mem_data(&pd->data, pd->offset + 4);
571 DEBUG(5,("api_pipe_auth_process: auth %d\n", pd->offset + 4));
572 NTLMSSPcalc_p(p, (uchar*)req_data, 12);
573 smb_io_rpc_auth_ntlmssp_chk("auth_sign", &(p->ntlmssp_chk), pd, 0);
575 if (!rpc_auth_ntlmssp_chk(&(p->ntlmssp_chk), crc32,
582 pd->offset = old_offset;
587 static BOOL api_pipe_request(pipes_struct *p, prs_struct *pd)
591 if (p->ntlmssp_auth && p->ntlmssp_validated)
593 if (!api_pipe_auth_process(p, pd)) return False;
595 DEBUG(0,("api_pipe_request: **** MUST CALL become_user() HERE **** \n"));
601 for (i = 0; api_fd_commands[i].pipe_clnt_name; i++)
603 if (strequal(api_fd_commands[i].pipe_clnt_name, p->name) &&
604 api_fd_commands[i].fn != NULL)
606 DEBUG(3,("Doing \\PIPE\\%s\n", api_fd_commands[i].pipe_clnt_name));
607 return api_fd_commands[i].fn(p, pd);
613 BOOL rpc_command(pipes_struct *p, prs_struct *pd)
616 if (pd->data == NULL) return False;
618 /* process the rpc header */
619 smb_io_rpc_hdr("", &p->hdr, pd, 0);
621 if (pd->offset == 0) return False;
623 switch (p->hdr.pkt_type)
627 reply = api_pipe_bind_req(p, pd);
632 if (p->ntlmssp_auth && !p->ntlmssp_validated)
634 /* authentication _was_ requested
635 and it failed. sorry, no deal!
641 /* read the rpc header */
642 smb_io_rpc_hdr_req("req", &(p->hdr_req), pd, 0);
643 reply = api_pipe_request(p, pd);
647 case RPC_BINDRESP: /* not the real name! */
649 reply = api_pipe_bind_auth_resp(p, pd);
650 p->ntlmssp_auth = reply;
657 DEBUG(3,("rpc_command: DCE/RPC fault should be sent here\n"));
664 /*******************************************************************
665 receives a netlogon pipe and responds.
666 ********************************************************************/
667 static BOOL api_rpc_command(pipes_struct *p,
668 char *rpc_name, struct api_struct *api_rpc_cmds,
672 DEBUG(4,("api_rpc_command: %s op 0x%x - ", rpc_name, p->hdr_req.opnum));
674 for (fn_num = 0; api_rpc_cmds[fn_num].name; fn_num++)
676 if (api_rpc_cmds[fn_num].opnum == p->hdr_req.opnum && api_rpc_cmds[fn_num].fn != NULL)
678 DEBUG(3,("api_rpc_command: %s\n", api_rpc_cmds[fn_num].name));
683 if (api_rpc_cmds[fn_num].name == NULL)
685 DEBUG(4, ("unknown\n"));
689 /* start off with 1024 bytes, and a large safety margin too */
690 prs_init(&p->rdata, 1024, 4, SAFETY_MARGIN, False);
692 /* do the actual command */
693 api_rpc_cmds[fn_num].fn(p->vuid, data, &(p->rdata));
695 if (p->rdata.data == NULL || p->rdata.offset == 0)
697 mem_free_data(p->rdata.data);
701 mem_realloc_data(p->rdata.data, p->rdata.offset);
703 DEBUG(10,("called %s\n", rpc_name));
709 /*******************************************************************
710 receives a netlogon pipe and responds.
711 ********************************************************************/
712 BOOL api_rpcTNP(pipes_struct *p, char *rpc_name, struct api_struct *api_rpc_cmds,
715 if (data == NULL || data->data == NULL)
717 DEBUG(2,("%s: NULL data received\n", rpc_name));
721 /* interpret the command */
722 if (!api_rpc_command(p, rpc_name, api_rpc_cmds, data))
727 /* create the rpc header */
728 if (!create_rpc_reply(p, 0, p->rdata.offset + (p->ntlmssp_auth ? (16 + 8) : 0)))