2 Unix SMB/CIFS implementation.
4 Winbind daemon - pam auth funcions
6 Copyright (C) Andrew Tridgell 2000
7 Copyright (C) Tim Potter 2001
8 Copyright (C) Andrew Bartlett 2001-2002
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.
28 #define DBGC_CLASS DBGC_WINBIND
31 static NTSTATUS append_info3_as_ndr(TALLOC_CTX *mem_ctx,
32 struct winbindd_cli_state *state,
33 NET_USER_INFO_3 *info3)
37 if (!prs_init(&ps, 256 /* Random, non-zero number */, mem_ctx, MARSHALL)) {
38 return NT_STATUS_NO_MEMORY;
40 if (!net_io_user_info3("", info3, &ps, 1, 3)) {
42 return NT_STATUS_UNSUCCESSFUL;
45 size = prs_data_size(&ps);
46 state->response.extra_data = malloc(size);
47 if (!state->response.extra_data) {
49 return NT_STATUS_NO_MEMORY;
51 memset( state->response.extra_data, '\0', size );
52 prs_copy_all_data_out(state->response.extra_data, &ps);
53 state->response.length += size;
58 static NTSTATUS check_info3_in_group(TALLOC_CTX *mem_ctx,
59 NET_USER_INFO_3 *info3,
60 const char *group_sid)
62 DOM_SID require_membership_of_sid;
64 size_t num_all_sids = (2 + info3->num_groups2 + info3->num_other_sids);
67 /* Parse the 'required group' SID */
69 if (!group_sid || !group_sid[0]) {
70 /* NO sid supplied, all users may access */
74 if (!string_to_sid(&require_membership_of_sid, group_sid)) {
75 DEBUG(0, ("check_info3_in_group: could not parse %s as a SID!",
78 return NT_STATUS_INVALID_PARAMETER;
81 all_sids = talloc(mem_ctx, sizeof(DOM_SID) * num_all_sids);
83 return NT_STATUS_NO_MEMORY;
85 /* and create (by appending rids) the 'domain' sids */
87 sid_copy(&all_sids[0], &(info3->dom_sid.sid));
89 if (!sid_append_rid(&all_sids[0], info3->user_rid)) {
90 DEBUG(3,("could not append user's primary RID 0x%x\n",
93 return NT_STATUS_INVALID_PARAMETER;
97 sid_copy(&all_sids[1], &(info3->dom_sid.sid));
99 if (!sid_append_rid(&all_sids[1], info3->group_rid)) {
100 DEBUG(3,("could not append additional group rid 0x%x\n",
103 return NT_STATUS_INVALID_PARAMETER;
107 for (i = 0; i < info3->num_groups2; i++) {
109 sid_copy(&all_sids[j], &(info3->dom_sid.sid));
111 if (!sid_append_rid(&all_sids[j], info3->gids[i].g_rid)) {
112 DEBUG(3,("could not append additional group rid 0x%x\n",
113 info3->gids[i].g_rid));
115 return NT_STATUS_INVALID_PARAMETER;
120 /* Copy 'other' sids. We need to do sid filtering here to
121 prevent possible elevation of privileges. See:
123 http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
126 for (i = 0; i < info3->num_other_sids; i++) {
127 sid_copy(&all_sids[info3->num_groups2 + i + 2],
128 &info3->other_sids[i].sid);
132 for (i = 0; i < j; i++) {
134 DEBUG(10, ("User has SID: %s\n",
135 sid_to_string(sid1, &all_sids[i])));
136 if (sid_equal(&require_membership_of_sid, &all_sids[i])) {
137 DEBUG(10, ("SID %s matches %s - user permitted to authenticate!\n",
138 sid_to_string(sid1, &require_membership_of_sid), sid_to_string(sid2, &all_sids[i])));
143 /* Do not distinguish this error from a wrong username/pw */
145 return NT_STATUS_LOGON_FAILURE;
148 /**********************************************************************
149 Authenticate a user with a clear text password
150 **********************************************************************/
152 enum winbindd_result winbindd_pam_auth(struct winbindd_cli_state *state)
155 fstring name_domain, name_user;
156 unsigned char trust_passwd[16];
157 time_t last_change_time;
158 uint32 sec_channel_type;
159 NET_USER_INFO_3 info3;
160 struct cli_state *cli = NULL;
162 TALLOC_CTX *mem_ctx = NULL;
167 unsigned char local_lm_response[24];
168 unsigned char local_nt_response[24];
169 struct winbindd_domain *contact_domain;
172 /* Ensure null termination */
173 state->request.data.auth.user[sizeof(state->request.data.auth.user)-1]='\0';
175 /* Ensure null termination */
176 state->request.data.auth.pass[sizeof(state->request.data.auth.pass)-1]='\0';
178 DEBUG(3, ("[%5lu]: pam auth %s\n", (unsigned long)state->pid,
179 state->request.data.auth.user));
181 if (!(mem_ctx = talloc_init("winbind pam auth for %s", state->request.data.auth.user))) {
182 DEBUG(0, ("winbindd_pam_auth: could not talloc_init()!\n"));
183 result = NT_STATUS_NO_MEMORY;
187 /* Parse domain and username */
189 parse_domain_user(state->request.data.auth.user, name_domain, name_user);
191 /* do password magic */
194 generate_random_buffer(chal, 8);
195 if (lp_client_ntlmv2_auth()) {
196 DATA_BLOB server_chal;
197 DATA_BLOB names_blob;
198 DATA_BLOB nt_response;
199 DATA_BLOB lm_response;
200 server_chal = data_blob_talloc(mem_ctx, chal, 8);
202 /* note that the 'workgroup' here is a best guess - we don't know
203 the server's domain at this point. The 'server name' is also
206 names_blob = NTLMv2_generate_names_blob(global_myname(), lp_workgroup());
208 if (!SMBNTLMv2encrypt(name_user, name_domain,
209 state->request.data.auth.pass,
212 &lm_response, &nt_response, NULL)) {
213 data_blob_free(&names_blob);
214 data_blob_free(&server_chal);
215 DEBUG(0, ("winbindd_pam_auth: SMBNTLMv2encrypt() failed!\n"));
216 result = NT_STATUS_NO_MEMORY;
219 data_blob_free(&names_blob);
220 data_blob_free(&server_chal);
221 lm_resp = data_blob_talloc(mem_ctx, lm_response.data, lm_response.length);
222 nt_resp = data_blob_talloc(mem_ctx, nt_response.data, nt_response.length);
223 data_blob_free(&lm_response);
224 data_blob_free(&nt_response);
227 if (lp_client_lanman_auth()
228 && SMBencrypt(state->request.data.auth.pass,
230 local_lm_response)) {
231 lm_resp = data_blob_talloc(mem_ctx,
233 sizeof(local_lm_response));
235 lm_resp = data_blob(NULL, 0);
237 SMBNTencrypt(state->request.data.auth.pass,
241 nt_resp = data_blob_talloc(mem_ctx,
243 sizeof(local_nt_response));
247 /* what domain should we contact? */
250 if (!(contact_domain = find_domain_from_name(name_domain))) {
251 DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
252 state->request.data.auth.user, name_domain, name_user, name_domain));
253 result = NT_STATUS_NO_SUCH_USER;
258 if (is_myname(name_domain)) {
259 DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
260 result = NT_STATUS_NO_SUCH_USER;
264 if (!(contact_domain = find_our_domain())) {
265 DEBUG(1, ("Authentication for [%s] -> [%s]\\[%s] in our domain failed - we can't find our domain!\n",
266 state->request.data.auth.user, name_domain, name_user));
267 result = NT_STATUS_NO_SUCH_USER;
272 if ( !get_trust_pw(contact_domain->name, trust_passwd, &last_change_time, &sec_channel_type) ) {
273 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
277 /* check authentication loop */
281 ZERO_STRUCT(ret_creds);
284 /* Don't shut this down - it belongs to the connection cache code */
285 result = cm_get_netlogon_cli(contact_domain, trust_passwd,
286 sec_channel_type, False, &cli);
288 if (!NT_STATUS_IS_OK(result)) {
289 DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
293 result = cli_netlogon_sam_network_logon(cli, mem_ctx,
295 name_user, name_domain,
296 global_myname(), chal,
301 /* We have to try a second time as cm_get_netlogon_cli
302 might not yet have noticed that the DC has killed
305 if ( cli->fd == -1 ) {
310 /* if we get access denied, a possible cuase was that we had and open
311 connection to the DC, but someone changed our machine account password
312 out from underneath us using 'net rpc changetrustpw' */
314 if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) ) {
315 DEBUG(3,("winbindd_pam_auth: sam_logon returned ACCESS_DENIED. Maybe the trust account "
316 "password was changed and we didn't know it. Killing connections to domain %s\n",
323 } while ( (attempts < 2) && retry );
326 /* We might have come out of the loop above with cli == NULL,
327 so don't dereference that. */
328 clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
331 if (NT_STATUS_IS_OK(result)) {
332 netsamlogon_cache_store( cli->mem_ctx, name_user, &info3 );
333 wcache_invalidate_samlogon(find_domain_from_name(name_domain), &info3);
335 /* Check if the user is in the right group */
337 if (!NT_STATUS_IS_OK(result = check_info3_in_group(mem_ctx, &info3, state->request.data.auth.require_membership_of_sid))) {
338 DEBUG(3, ("User %s is not in the required group (%s), so plaintext authentication is rejected\n",
339 state->request.data.auth.user,
340 state->request.data.auth.require_membership_of_sid));
345 /* give us a more useful (more correct?) error code */
346 if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
347 result = NT_STATUS_NO_LOGON_SERVERS;
350 state->response.data.auth.nt_status = NT_STATUS_V(result);
351 fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
353 /* we might have given a more useful error above */
354 if (!*state->response.data.auth.error_string)
355 fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
356 state->response.data.auth.pam_error = nt_status_to_pam(result);
358 DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authentication for user %s returned %s (PAM: %d)\n",
359 state->request.data.auth.user,
360 state->response.data.auth.nt_status_string,
361 state->response.data.auth.pam_error));
363 if ( NT_STATUS_IS_OK(result) &&
364 (state->request.flags & WBFLAG_PAM_AFS_TOKEN) ) {
366 char *afsname = strdup(lp_afs_username_map());
369 if (afsname == NULL) goto no_token;
371 afsname = realloc_string_sub(afsname, "%D", name_domain);
372 afsname = realloc_string_sub(afsname, "%u", name_user);
373 afsname = realloc_string_sub(afsname, "%U", name_user);
375 if (afsname == NULL) goto no_token;
379 cell = strchr(afsname, '@');
381 if (cell == NULL) goto no_token;
386 /* Append an AFS token string */
387 state->response.extra_data =
388 afs_createtoken_str(afsname, cell);
390 if (state->response.extra_data != NULL)
391 state->response.length +=
392 strlen(state->response.extra_data)+1;
399 talloc_destroy(mem_ctx);
401 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
404 /**********************************************************************
405 Challenge Response Authentication Protocol
406 **********************************************************************/
408 enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
411 unsigned char trust_passwd[16];
412 time_t last_change_time;
413 uint32 sec_channel_type;
414 NET_USER_INFO_3 info3;
415 struct cli_state *cli = NULL;
416 TALLOC_CTX *mem_ctx = NULL;
417 const char *name_user = NULL;
418 const char *name_domain = NULL;
419 const char *workstation;
420 struct winbindd_domain *contact_domain;
425 DATA_BLOB lm_resp, nt_resp;
427 if (!state->privileged) {
428 char *error_string = NULL;
429 DEBUG(2, ("winbindd_pam_auth_crap: non-privileged access denied. !\n"));
430 DEBUGADD(2, ("winbindd_pam_auth_crap: Ensure permissions on %s are set correctly.\n",
431 get_winbind_priv_pipe_dir()));
432 /* send a better message than ACCESS_DENIED */
433 asprintf(&error_string, "winbind client not authorized to use winbindd_pam_auth_crap. Ensure permissions on %s are set correctly.",
434 get_winbind_priv_pipe_dir());
435 fstrcpy(state->response.data.auth.error_string, error_string);
436 SAFE_FREE(error_string);
437 result = NT_STATUS_ACCESS_DENIED;
441 /* Ensure null termination */
442 state->request.data.auth_crap.user[sizeof(state->request.data.auth_crap.user)-1]=0;
443 state->request.data.auth_crap.domain[sizeof(state->request.data.auth_crap.domain)-1]=0;
445 if (!(mem_ctx = talloc_init("winbind pam auth crap for %s", state->request.data.auth_crap.user))) {
446 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
447 result = NT_STATUS_NO_MEMORY;
451 name_user = state->request.data.auth_crap.user;
453 if (*state->request.data.auth_crap.domain) {
454 name_domain = state->request.data.auth_crap.domain;
455 } else if (lp_winbind_use_default_domain()) {
456 name_domain = lp_workgroup();
458 DEBUG(5,("no domain specified with username (%s) - failing auth\n",
460 result = NT_STATUS_NO_SUCH_USER;
464 DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n", (unsigned long)state->pid,
465 name_domain, name_user));
467 if (*state->request.data.auth_crap.workstation) {
468 workstation = state->request.data.auth_crap.workstation;
470 workstation = global_myname();
473 if (state->request.data.auth_crap.lm_resp_len > sizeof(state->request.data.auth_crap.lm_resp)
474 || state->request.data.auth_crap.nt_resp_len > sizeof(state->request.data.auth_crap.nt_resp)) {
475 DEBUG(0, ("winbindd_pam_auth_crap: invalid password length %u/%u\n",
476 state->request.data.auth_crap.lm_resp_len,
477 state->request.data.auth_crap.nt_resp_len));
478 result = NT_STATUS_INVALID_PARAMETER;
482 lm_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.lm_resp, state->request.data.auth_crap.lm_resp_len);
483 nt_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.nt_resp, state->request.data.auth_crap.nt_resp_len);
486 /* what domain should we contact? */
489 if (!(contact_domain = find_domain_from_name(name_domain))) {
490 DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
491 state->request.data.auth_crap.user, name_domain, name_user, name_domain));
492 result = NT_STATUS_NO_SUCH_USER;
497 if (is_myname(name_domain)) {
498 DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
499 result = NT_STATUS_NO_SUCH_USER;
503 if (!(contact_domain = find_our_domain())) {
504 DEBUG(1, ("Authenticatoin for [%s] -> [%s]\\[%s] in our domain failed - we can't find our domain!\n",
505 state->request.data.auth_crap.user, name_domain, name_user));
506 result = NT_STATUS_NO_SUCH_USER;
511 if ( !get_trust_pw(contact_domain->name, trust_passwd, &last_change_time, &sec_channel_type) ) {
512 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
518 ZERO_STRUCT(ret_creds);
521 /* Don't shut this down - it belongs to the connection cache code */
522 result = cm_get_netlogon_cli(contact_domain, trust_passwd, sec_channel_type, False, &cli);
524 if (!NT_STATUS_IS_OK(result)) {
525 DEBUG(3, ("could not open handle to NETLOGON pipe (error: %s)\n",
530 result = cli_netlogon_sam_network_logon(cli, mem_ctx,
532 name_user, name_domain,
534 state->request.data.auth_crap.chal,
540 /* We have to try a second time as cm_get_netlogon_cli
541 might not yet have noticed that the DC has killed
544 if ( cli->fd == -1 ) {
549 /* if we get access denied, a possible cause was that we had and open
550 connection to the DC, but someone changed our machine account password
551 out from underneath us using 'net rpc changetrustpw' */
553 if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) ) {
554 DEBUG(3,("winbindd_pam_auth_crap: sam_logon returned ACCESS_DENIED. Maybe the trust account "
555 "password was changed and we didn't know it. Killing connections to domain %s\n",
556 contact_domain->name));
562 } while ( (attempts < 2) && retry );
565 /* We might have come out of the loop above with cli == NULL,
566 so don't dereference that. */
567 clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
570 if (NT_STATUS_IS_OK(result)) {
571 netsamlogon_cache_store( cli->mem_ctx, name_user, &info3 );
572 wcache_invalidate_samlogon(find_domain_from_name(name_domain), &info3);
574 if (!NT_STATUS_IS_OK(result = check_info3_in_group(mem_ctx, &info3, state->request.data.auth_crap.require_membership_of_sid))) {
575 DEBUG(3, ("User %s is not in the required group (%s), so plaintext authentication is rejected\n",
576 state->request.data.auth_crap.user,
577 state->request.data.auth_crap.require_membership_of_sid));
581 if (state->request.flags & WBFLAG_PAM_INFO3_NDR) {
582 result = append_info3_as_ndr(mem_ctx, state, &info3);
583 } else if (state->request.flags & WBFLAG_PAM_UNIX_NAME) {
584 /* ntlm_auth should return the unix username, per
585 'winbind use default domain' settings and the like */
587 fstring username_out;
588 const char *nt_username, *nt_domain;
589 if (!(nt_username = unistr2_tdup(mem_ctx, &(info3.uni_user_name)))) {
590 /* If the server didn't give us one, just use the one we sent them */
591 nt_username = name_user;
594 if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3.uni_logon_dom)))) {
595 /* If the server didn't give us one, just use the one we sent them */
596 nt_domain = name_domain;
599 fill_domain_username(username_out, nt_domain, nt_username);
601 DEBUG(5, ("Setting unix username to [%s]\n", username_out));
603 state->response.extra_data = strdup(username_out);
604 if (!state->response.extra_data) {
605 result = NT_STATUS_NO_MEMORY;
608 state->response.length += strlen(state->response.extra_data)+1;
611 if (state->request.flags & WBFLAG_PAM_USER_SESSION_KEY) {
612 memcpy(state->response.data.auth.user_session_key, info3.user_sess_key, sizeof(state->response.data.auth.user_session_key) /* 16 */);
614 if (state->request.flags & WBFLAG_PAM_LMKEY) {
615 memcpy(state->response.data.auth.first_8_lm_hash, info3.padding, sizeof(state->response.data.auth.first_8_lm_hash) /* 8 */);
620 /* give us a more useful (more correct?) error code */
621 if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
622 result = NT_STATUS_NO_LOGON_SERVERS;
625 if (state->request.flags & WBFLAG_PAM_NT_STATUS_SQUASH) {
626 result = nt_status_squash(result);
629 state->response.data.auth.nt_status = NT_STATUS_V(result);
630 fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
632 /* we might have given a more useful error above */
633 if (!*state->response.data.auth.error_string)
634 fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
635 state->response.data.auth.pam_error = nt_status_to_pam(result);
637 DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
638 ("NTLM CRAP authentication for user [%s]\\[%s] returned %s (PAM: %d)\n",
641 state->response.data.auth.nt_status_string,
642 state->response.data.auth.pam_error));
645 talloc_destroy(mem_ctx);
647 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
650 /* Change a user password */
652 enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
655 char *oldpass, *newpass;
656 fstring domain, user;
659 struct winbindd_domain *contact_domain;
661 DEBUG(3, ("[%5lu]: pam chauthtok %s\n", (unsigned long)state->pid,
662 state->request.data.chauthtok.user));
664 if (!(mem_ctx = talloc_init("winbind password change for %s",
665 state->request.data.chauthtok.user))) {
666 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
667 result = NT_STATUS_NO_MEMORY;
674 return WINBINDD_ERROR;
676 parse_domain_user(state->request.data.chauthtok.user, domain, user);
678 if (!(contact_domain = find_domain_from_name(domain))) {
679 DEBUG(3, ("Cannot change password for [%s] -> [%s]\\[%s] as %s is not a trusted domain\n",
680 state->request.data.chauthtok.user, domain, user, domain));
681 result = NT_STATUS_NO_SUCH_USER;
685 /* Change password */
687 oldpass = state->request.data.chauthtok.oldpass;
688 newpass = state->request.data.chauthtok.newpass;
692 if (!NT_STATUS_IS_OK(result = cm_get_sam_handle(contact_domain, &hnd)) ) {
693 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
697 result = cli_samr_chgpasswd_user(hnd->cli, mem_ctx, user, newpass, oldpass);
700 state->response.data.auth.nt_status = NT_STATUS_V(result);
701 fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
702 fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
703 state->response.data.auth.pam_error = nt_status_to_pam(result);
705 DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
706 ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n",
709 state->response.data.auth.nt_status_string,
710 state->response.data.auth.pam_error));
713 talloc_destroy(mem_ctx);
715 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;