2 Unix SMB/Netbios implementation.
5 Copyright (C) Andrew Tridgell 1998-2001
6 Copyright (C) Andrew Bartlett 2001
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 uint32 global_client_caps = 0;
26 static auth_authsupplied_info *ntlmssp_auth_info;
28 /****************************************************************************
29 Add the standard 'Samba' signature to the end of the session setup.
30 ****************************************************************************/
31 static void add_signature(char *outbuf)
35 p += srvstr_push(outbuf, p, "Unix", -1, STR_TERMINATE);
36 p += srvstr_push(outbuf, p, "Samba", -1, STR_TERMINATE);
37 p += srvstr_push(outbuf, p, lp_workgroup(), -1, STR_TERMINATE);
38 set_message_end(outbuf,p);
41 /****************************************************************************
42 Do a 'guest' logon, getting back the
43 ****************************************************************************/
44 static NTSTATUS check_guest_password(auth_serversupplied_info **server_info)
47 auth_authsupplied_info *auth_info;
48 auth_usersupplied_info *user_info = NULL;
55 DEBUG(3,("Got anonymous request\n"));
57 make_user_info_guest(&user_info);
58 make_auth_info_fixed(&auth_info, chal);
60 nt_status = check_password(user_info, auth_info, server_info);
61 free_auth_info(&auth_info);
62 free_user_info(&user_info);
68 /****************************************************************************
69 reply to a session setup spnego negotiate packet for kerberos
70 ****************************************************************************/
71 static int reply_spnego_kerberos(connection_struct *conn,
72 char *inbuf, char *outbuf,
73 int length, int bufsize,
78 const struct passwd *pw;
83 auth_serversupplied_info *server_info = NULL;
86 if (!spnego_parse_krb5_wrap(*secblob, &ticket)) {
87 return ERROR_NT(NT_STATUS_LOGON_FAILURE);
90 ads = ads_init(NULL, NULL, NULL, NULL);
92 ret = ads_verify_ticket(ads, &ticket, &client, &auth_data);
93 if (!NT_STATUS_IS_OK(ret)) {
94 DEBUG(1,("Failed to verify incoming ticket!\n"));
96 return ERROR_NT(NT_STATUS_LOGON_FAILURE);
99 DEBUG(3,("Ticket name is [%s]\n", client));
101 p = strchr_m(client, '@');
103 DEBUG(3,("Doesn't look like a valid principal\n"));
105 return ERROR_NT(NT_STATUS_LOGON_FAILURE);
109 if (strcasecmp(p+1, ads->realm) != 0) {
110 DEBUG(3,("Ticket for incorrect realm %s\n", p+1));
112 return ERROR_NT(NT_STATUS_LOGON_FAILURE);
118 /* the password is good - let them in */
119 pw = smb_getpwnam(user,False);
121 DEBUG(1,("Username %s is invalid on this system\n",user));
122 return ERROR_NT(NT_STATUS_NO_SUCH_USER);
125 if (!make_server_info_pw(&server_info,pw)) {
126 DEBUG(1,("make_server_info_from_pw failed!\n"));
127 return ERROR_NT(NT_STATUS_NO_MEMORY);
130 sess_vuid = register_vuid(server_info, user);
132 free_server_info(&server_info);
134 if (sess_vuid == -1) {
135 return ERROR_NT(NT_STATUS_LOGON_FAILURE);
138 set_message(outbuf,4,0,True);
139 SSVAL(outbuf, smb_vwv3, 0);
140 add_signature(outbuf);
142 SSVAL(outbuf,smb_uid,sess_vuid);
143 SSVAL(inbuf,smb_uid,sess_vuid);
145 return chain_reply(inbuf,outbuf,length,bufsize);
150 /****************************************************************************
151 send a security blob via a session setup reply
152 ****************************************************************************/
153 static BOOL reply_sesssetup_blob(connection_struct *conn, char *outbuf,
158 set_message(outbuf,4,0,True);
160 /* we set NT_STATUS_MORE_PROCESSING_REQUIRED to tell the other end
161 that we aren't finished yet */
163 SIVAL(outbuf, smb_rcls, NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED));
164 SSVAL(outbuf, smb_vwv0, 0xFF); /* no chaining possible */
165 SSVAL(outbuf, smb_vwv3, blob.length);
167 memcpy(p, blob.data, blob.length);
169 p += srvstr_push(outbuf, p, "Unix", -1, STR_TERMINATE);
170 p += srvstr_push(outbuf, p, "Samba", -1, STR_TERMINATE);
171 p += srvstr_push(outbuf, p, lp_workgroup(), -1, STR_TERMINATE);
172 set_message_end(outbuf,p);
174 return send_smb(smbd_server_fd(),outbuf);
177 /****************************************************************************
178 reply to a session setup spnego negotiate packet
179 ****************************************************************************/
180 static int reply_spnego_negotiate(connection_struct *conn,
183 int length, int bufsize,
186 char *OIDs[ASN1_MAX_OIDS];
189 uint32 ntlmssp_command, neg_flags;
190 DATA_BLOB sess_key, chal, spnego_chal;
192 BOOL got_kerberos = False;
194 /* parse out the OIDs and the first sec blob */
195 if (!parse_negTokenTarg(blob1, OIDs, &secblob)) {
196 return ERROR_NT(NT_STATUS_LOGON_FAILURE);
199 for (i=0;OIDs[i];i++) {
200 DEBUG(3,("Got OID %s\n", OIDs[i]));
201 if (strcmp(OID_KERBEROS5, OIDs[i]) == 0 ||
202 strcmp(OID_KERBEROS5_OLD, OIDs[i]) == 0) {
207 DEBUG(3,("Got secblob of size %d\n", secblob.length));
211 int ret = reply_spnego_kerberos(conn, inbuf, outbuf,
212 length, bufsize, &secblob);
213 data_blob_free(&secblob);
218 /* parse the NTLMSSP packet */
220 file_save("secblob.dat", secblob.data, secblob.length);
223 if (!msrpc_parse(&secblob, "CddB",
228 return ERROR_NT(NT_STATUS_LOGON_FAILURE);
231 data_blob_free(&secblob);
232 data_blob_free(&sess_key);
234 if (ntlmssp_command != NTLMSSP_NEGOTIATE) {
235 return ERROR_NT(NT_STATUS_LOGON_FAILURE);
238 DEBUG(3,("Got neg_flags=%08x\n", neg_flags));
240 if (!make_auth_info_subsystem(&ntlmssp_auth_info)) {
241 return ERROR_NT(NT_STATUS_NO_MEMORY);
244 cryptkey = auth_get_challenge(ntlmssp_auth_info);
246 /* Give them the challenge. For now, ignore neg_flags and just
247 return the flags we want. Obviously this is not correct */
249 neg_flags = NTLMSSP_NEGOTIATE_UNICODE |
250 NTLMSSP_NEGOTIATE_LM_KEY |
251 NTLMSSP_NEGOTIATE_NTLM;
253 msrpc_gen(&chal, "Cddddbdddd",
259 cryptkey.data, cryptkey.length,
263 if (!spnego_gen_challenge(&spnego_chal, &chal, &chal)) {
264 DEBUG(3,("Failed to generate challenge\n"));
265 return ERROR_NT(NT_STATUS_LOGON_FAILURE);
268 /* now tell the client to send the auth packet */
269 reply_sesssetup_blob(conn, outbuf, spnego_chal);
271 data_blob_free(&chal);
272 data_blob_free(&cryptkey);
273 data_blob_free(&spnego_chal);
275 /* and tell smbd that we have already replied to this packet */
280 /****************************************************************************
281 reply to a session setup spnego auth packet
282 ****************************************************************************/
283 static int reply_spnego_auth(connection_struct *conn, char *inbuf, char *outbuf,
284 int length, int bufsize,
288 char *workgroup = NULL, *user = NULL, *machine = NULL;
289 DATA_BLOB lmhash, nthash, sess_key;
290 DATA_BLOB plaintext_password = data_blob(NULL, 0);
291 uint32 ntlmssp_command, neg_flags;
295 auth_usersupplied_info *user_info = NULL;
296 auth_serversupplied_info *server_info = NULL;
298 if (!spnego_parse_auth(blob1, &auth)) {
300 file_save("auth.dat", blob1.data, blob1.length);
302 return ERROR_NT(NT_STATUS_LOGON_FAILURE);
305 /* now the NTLMSSP encoded auth hashes */
306 if (!msrpc_parse(&auth, "CdBBUUUBd",
316 return ERROR_NT(NT_STATUS_LOGON_FAILURE);
319 data_blob_free(&auth);
320 data_blob_free(&sess_key);
322 DEBUG(3,("Got user=[%s] workgroup=[%s] machine=[%s] len1=%d len2=%d\n",
323 user, workgroup, machine, lmhash.length, nthash.length));
326 file_save("nthash1.dat", nthash.data, nthash.length);
327 file_save("lmhash1.dat", lmhash.data, lmhash.length);
330 if (!make_user_info_map(&user_info,
336 return ERROR_NT(NT_STATUS_NO_MEMORY);
339 SAFE_FREE(workgroup);
343 nt_status = check_password(user_info, ntlmssp_auth_info, &server_info);
345 free_auth_info(&ntlmssp_auth_info);
347 free_user_info(&user_info);
349 data_blob_free(&lmhash);
351 data_blob_free(&nthash);
353 if (!NT_STATUS_IS_OK(nt_status)) {
354 return ERROR_NT(nt_status_squash(nt_status));
357 sess_vuid = register_vuid(server_info, user);
359 free_server_info(&server_info);
361 if (sess_vuid == -1) {
362 return ERROR_NT(NT_STATUS_LOGON_FAILURE);
365 set_message(outbuf,4,0,True);
366 SSVAL(outbuf, smb_vwv3, 0);
367 add_signature(outbuf);
369 SSVAL(outbuf,smb_uid,sess_vuid);
370 SSVAL(inbuf,smb_uid,sess_vuid);
372 return chain_reply(inbuf,outbuf,length,bufsize);
376 /****************************************************************************
377 reply to a session setup spnego anonymous packet
378 ****************************************************************************/
379 static int reply_spnego_anonymous(connection_struct *conn, char *inbuf, char *outbuf,
380 int length, int bufsize)
383 auth_serversupplied_info *server_info = NULL;
386 nt_status = check_guest_password(&server_info);
388 if (!NT_STATUS_IS_OK(nt_status)) {
389 return ERROR_NT(nt_status_squash(nt_status));
392 sess_vuid = register_vuid(server_info, lp_guestaccount());
394 free_server_info(&server_info);
396 if (sess_vuid == -1) {
397 return ERROR_NT(NT_STATUS_LOGON_FAILURE);
400 set_message(outbuf,4,0,True);
401 SSVAL(outbuf, smb_vwv3, 0);
402 add_signature(outbuf);
404 SSVAL(outbuf,smb_uid,sess_vuid);
405 SSVAL(inbuf,smb_uid,sess_vuid);
407 return chain_reply(inbuf,outbuf,length,bufsize);
411 /****************************************************************************
412 reply to a session setup command
413 ****************************************************************************/
414 static int reply_sesssetup_and_X_spnego(connection_struct *conn, char *inbuf,char *outbuf,
415 int length,int bufsize)
421 DEBUG(3,("Doing spnego session setup\n"));
423 if (global_client_caps == 0) {
424 global_client_caps = IVAL(inbuf,smb_vwv10);
427 p = (uint8 *)smb_buf(inbuf);
429 if (SVAL(inbuf, smb_vwv7) == 0) {
430 /* an anonymous request */
431 return reply_spnego_anonymous(conn, inbuf, outbuf, length, bufsize);
434 /* pull the spnego blob */
435 blob1 = data_blob(p, SVAL(inbuf, smb_vwv7));
438 file_save("negotiate.dat", blob1.data, blob1.length);
441 if (blob1.data[0] == ASN1_APPLICATION(0)) {
442 /* its a negTokenTarg packet */
443 ret = reply_spnego_negotiate(conn, inbuf, outbuf, length, bufsize, blob1);
444 data_blob_free(&blob1);
448 if (blob1.data[0] == ASN1_CONTEXT(1)) {
449 /* its a auth packet */
450 ret = reply_spnego_auth(conn, inbuf, outbuf, length, bufsize, blob1);
451 data_blob_free(&blob1);
455 /* what sort of packet is this? */
456 DEBUG(1,("Unknown packet in reply_sesssetup_and_X_spnego\n"));
458 data_blob_free(&blob1);
460 return ERROR_NT(NT_STATUS_LOGON_FAILURE);
464 /****************************************************************************
465 reply to a session setup command
466 ****************************************************************************/
467 int reply_sesssetup_and_X(connection_struct *conn, char *inbuf,char *outbuf,
468 int length,int bufsize)
474 DATA_BLOB plaintext_password;
476 pstring sub_user; /* Sainitised username for substituion */
479 fstring native_lanman;
480 static BOOL done_sesssetup = False;
481 extern BOOL global_encrypted_passwords_negotiated;
482 extern BOOL global_spnego_negotiated;
484 extern fstring remote_machine;
485 extern userdom_struct current_user_info;
488 auth_usersupplied_info *user_info = NULL;
489 extern auth_authsupplied_info *negprot_global_auth_info;
490 auth_serversupplied_info *server_info = NULL;
494 BOOL doencrypt = global_encrypted_passwords_negotiated;
496 START_PROFILE(SMBsesssetupX);
498 ZERO_STRUCT(lm_resp);
499 ZERO_STRUCT(nt_resp);
500 ZERO_STRUCT(plaintext_password);
502 DEBUG(3,("wct=%d flg2=0x%x\n", CVAL(inbuf, smb_wct), SVAL(inbuf, smb_flg2)));
504 /* a SPNEGO session setup has 12 command words, whereas a normal
505 NT1 session setup has 13. See the cifs spec. */
506 if (CVAL(inbuf, smb_wct) == 12 &&
507 (SVAL(inbuf, smb_flg2) & FLAGS2_EXTENDED_SECURITY)) {
508 return reply_sesssetup_and_X_spnego(conn, inbuf, outbuf, length, bufsize);
511 smb_bufsize = SVAL(inbuf,smb_vwv2);
513 if (Protocol < PROTOCOL_NT1) {
514 uint16 passlen1 = SVAL(inbuf,smb_vwv7);
515 if (passlen1 > MAX_PASS_LEN) {
516 return ERROR_DOS(ERRDOS,ERRbuftoosmall);
520 lm_resp = data_blob(smb_buf(inbuf), passlen1);
522 plaintext_password = data_blob(smb_buf(inbuf), passlen1+1);
523 /* Ensure null termination */
524 plaintext_password.data[passlen1] = 0;
527 srvstr_pull(inbuf, user, smb_buf(inbuf)+passlen1, sizeof(user), -1, STR_TERMINATE);
531 uint16 passlen1 = SVAL(inbuf,smb_vwv7);
532 uint16 passlen2 = SVAL(inbuf,smb_vwv8);
533 enum remote_arch_types ra_type = get_remote_arch();
534 char *p = smb_buf(inbuf);
536 if(global_client_caps == 0)
537 global_client_caps = IVAL(inbuf,smb_vwv11);
539 /* client_caps is used as final determination if client is NT or Win95.
540 This is needed to return the correct error codes in some
544 if(ra_type == RA_WINNT || ra_type == RA_WIN2K || ra_type == RA_WIN95) {
545 if(!(global_client_caps & (CAP_NT_SMBS | CAP_STATUS32))) {
546 set_remote_arch( RA_WIN95);
550 if (passlen1 > MAX_PASS_LEN) {
551 return ERROR_DOS(ERRDOS,ERRbuftoosmall);
554 passlen1 = MIN(passlen1, MAX_PASS_LEN);
555 passlen2 = MIN(passlen2, MAX_PASS_LEN);
558 /* both Win95 and WinNT stuff up the password lengths for
559 non-encrypting systems. Uggh.
561 if passlen1==24 its a win95 system, and its setting the
562 password length incorrectly. Luckily it still works with the
563 default code because Win95 will null terminate the password
566 if passlen1>0 and passlen2>0 then maybe its a NT box and its
567 setting passlen2 to some random value which really stuffs
568 things up. we need to fix that one. */
570 if (passlen1 > 0 && passlen2 > 0 && passlen2 != 24 && passlen2 != 1)
574 /* Save the lanman2 password and the NT md4 password. */
576 if ((doencrypt) && (passlen1 != 0) && (passlen1 != 24)) {
581 lm_resp = data_blob(p, passlen1);
582 nt_resp = data_blob(p+passlen1, passlen2);
584 plaintext_password = data_blob(p, passlen1+1);
585 /* Ensure null termination */
586 plaintext_password.data[passlen1] = 0;
589 p += passlen1 + passlen2;
590 p += srvstr_pull(inbuf, user, p, sizeof(user), -1,
592 p += srvstr_pull(inbuf, domain, p, sizeof(domain),
594 p += srvstr_pull(inbuf, native_os, p, sizeof(native_os),
596 p += srvstr_pull(inbuf, native_lanman, p, sizeof(native_lanman),
598 DEBUG(3,("Domain=[%s] NativeOS=[%s] NativeLanMan=[%s]\n",
599 domain,native_os,native_lanman));
602 /* don't allow for weird usernames or domains */
603 alpha_strcpy(user, user, ". _-$", sizeof(user));
604 alpha_strcpy(domain, domain, ". _-", sizeof(domain));
605 if (strstr(user, "..") || strstr(domain,"..")) {
606 return ERROR_NT(NT_STATUS_LOGON_FAILURE);
609 DEBUG(3,("sesssetupX:name=[%s]\\[%s]@[%s]\n", domain, user, remote_machine));
612 if (global_spnego_negotiated) {
613 DEBUG(0,("reply_sesssetup_and_X: Rejecting attempt at 'normal' session setup after negotiating spnego.\n"));
614 return ERROR_NT(NT_STATUS_UNSUCCESSFUL);
619 pstrcpy(sub_user, user);
621 pstrcpy(sub_user, lp_guestaccount());
624 pstrcpy(current_user_info.smb_name,sub_user);
626 reload_services(True);
628 if (lp_security() == SEC_SHARE) {
629 /* in share level we should ignore any passwords */
631 data_blob_free(&lm_resp);
632 data_blob_free(&nt_resp);
633 data_blob_clear_free(&plaintext_password);
635 map_username(sub_user);
636 add_session_user(sub_user);
637 /* Then force it to null for the benfit of the code below */
643 nt_status = check_guest_password(&server_info);
645 } else if (doencrypt) {
646 if (!make_user_info_for_reply_enc(&user_info,
649 plaintext_password)) {
650 return ERROR_NT(NT_STATUS_NO_MEMORY);
653 nt_status = check_password(user_info, negprot_global_auth_info, &server_info);
656 auth_authsupplied_info *plaintext_auth_info = NULL;
658 if (!make_auth_info_subsystem(&plaintext_auth_info)) {
659 return ERROR_NT(NT_STATUS_NO_MEMORY);
662 chal = auth_get_challenge(plaintext_auth_info);
664 if (!make_user_info_for_reply(&user_info,
665 user, domain, chal.data,
666 plaintext_password)) {
667 return ERROR_NT(NT_STATUS_NO_MEMORY);
670 nt_status = check_password(user_info, plaintext_auth_info, &server_info);
672 data_blob_free(&chal);
673 free_auth_info(&plaintext_auth_info);
676 free_user_info(&user_info);
678 data_blob_free(&lm_resp);
679 data_blob_free(&nt_resp);
680 data_blob_clear_free(&plaintext_password);
682 if (!NT_STATUS_IS_OK(nt_status)) {
683 if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
684 if ((lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_USER) ||
685 (lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_PASSWORD)) {
687 DEBUG(3,("No such user %s [%s] - using guest account\n",user, domain));
688 make_server_info_guest(&server_info);
689 nt_status = NT_STATUS_OK;
692 } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
693 if (lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_PASSWORD) {
694 DEBUG(3,("Registered username %s for guest access\n",user));
695 make_server_info_guest(&server_info);
696 nt_status = NT_STATUS_OK;
701 if (!NT_STATUS_IS_OK(nt_status)) {
702 return ERROR_NT(nt_status_squash(nt_status));
705 /* it's ok - setup a reply */
706 if (Protocol < PROTOCOL_NT1) {
707 set_message(outbuf,3,0,True);
709 set_message(outbuf,3,0,True);
710 add_signature(outbuf);
711 /* perhaps grab OS version here?? */
714 if (server_info->guest) {
715 SSVAL(outbuf,smb_vwv2,1);
717 const char *home_dir = pdb_get_homedir(server_info->sam_account);
718 const char *username = pdb_get_username(server_info->sam_account);
719 if ((home_dir && *home_dir)
720 && (lp_servicenumber(username) < 0)) {
721 add_home_service(username, home_dir);
725 /* register the name and uid as being validated, so further connections
726 to a uid can get through without a password, on the same VC */
728 sess_vuid = register_vuid(server_info, sub_user);
730 free_server_info(&server_info);
732 if (sess_vuid == -1) {
733 return ERROR_NT(NT_STATUS_LOGON_FAILURE);
737 SSVAL(outbuf,smb_uid,sess_vuid);
738 SSVAL(inbuf,smb_uid,sess_vuid);
741 max_send = MIN(max_send,smb_bufsize);
743 done_sesssetup = True;
745 END_PROFILE(SMBsesssetupX);
746 return chain_reply(inbuf,outbuf,length,bufsize);