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 prs_copy_all_data_out(state->response.extra_data, &ps);
52 state->response.length += size;
57 /**********************************************************************
58 Authenticate a user with a clear test password
59 **********************************************************************/
61 enum winbindd_result winbindd_pam_auth(struct winbindd_cli_state *state)
64 fstring name_domain, name_user;
65 unsigned char trust_passwd[16];
66 time_t last_change_time;
67 uint32 sec_channel_type;
68 NET_USER_INFO_3 info3;
69 struct cli_state *cli = NULL;
71 TALLOC_CTX *mem_ctx = NULL;
76 unsigned char local_lm_response[24];
77 unsigned char local_nt_response[24];
78 struct winbindd_domain *contact_domain;
81 /* Ensure null termination */
82 state->request.data.auth.user[sizeof(state->request.data.auth.user)-1]='\0';
84 /* Ensure null termination */
85 state->request.data.auth.pass[sizeof(state->request.data.auth.pass)-1]='\0';
87 DEBUG(3, ("[%5lu]: pam auth %s\n", (unsigned long)state->pid,
88 state->request.data.auth.user));
90 if (!(mem_ctx = talloc_init("winbind pam auth for %s", state->request.data.auth.user))) {
91 DEBUG(0, ("winbindd_pam_auth: could not talloc_init()!\n"));
92 result = NT_STATUS_NO_MEMORY;
96 /* Parse domain and username */
98 parse_domain_user(state->request.data.auth.user, name_domain, name_user);
100 /* do password magic */
102 generate_random_buffer(chal, 8, False);
103 SMBencrypt(state->request.data.auth.pass, chal, local_lm_response);
105 SMBNTencrypt(state->request.data.auth.pass, chal, local_nt_response);
107 lm_resp = data_blob_talloc(mem_ctx, local_lm_response, sizeof(local_lm_response));
108 nt_resp = data_blob_talloc(mem_ctx, local_nt_response, sizeof(local_nt_response));
110 /* what domain should we contact? */
113 if (!(contact_domain = find_domain_from_name(name_domain))) {
114 DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
115 state->request.data.auth.user, name_domain, name_user, name_domain));
116 result = NT_STATUS_NO_SUCH_USER;
121 if (is_myname(name_domain)) {
122 DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
123 result = NT_STATUS_NO_SUCH_USER;
127 if (!(contact_domain = find_our_domain())) {
128 DEBUG(1, ("Authenticatoin for [%s] -> [%s]\\[%s] in our domain failed - we can't find our domain!\n",
129 state->request.data.auth.user, name_domain, name_user));
130 result = NT_STATUS_NO_SUCH_USER;
135 if ( !get_trust_pw(contact_domain->name, trust_passwd, &last_change_time, &sec_channel_type) ) {
136 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
140 /* check authentication loop */
144 ZERO_STRUCT(ret_creds);
147 /* Don't shut this down - it belongs to the connection cache code */
148 result = cm_get_netlogon_cli(contact_domain, trust_passwd,
149 sec_channel_type, False, &cli);
151 if (!NT_STATUS_IS_OK(result)) {
152 DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
156 result = cli_netlogon_sam_network_logon(cli, mem_ctx,
158 name_user, name_domain,
159 global_myname(), chal,
164 /* We have to try a second time as cm_get_netlogon_cli
165 might not yet have noticed that the DC has killed
168 if ( cli->fd == -1 ) {
173 /* if we get access denied, a possible cuase was that we had and open
174 connection to the DC, but someone changed our machine account password
175 out from underneath us using 'net rpc changetrustpw' */
177 if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) ) {
178 DEBUG(3,("winbindd_pam_auth: sam_logon returned ACCESS_DENIED. Maybe the trust account "
179 "password was changed and we didn't know it. Killing connections to domain %s\n",
186 } while ( (attempts < 2) && retry );
188 clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
190 if (NT_STATUS_IS_OK(result)) {
191 netsamlogon_cache_store( cli->mem_ctx, &info3 );
192 wcache_invalidate_samlogon(find_domain_from_name(name_domain), &info3);
196 /* give us a more useful (more correct?) error code */
197 if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
198 result = NT_STATUS_NO_LOGON_SERVERS;
201 state->response.data.auth.nt_status = NT_STATUS_V(result);
202 fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
204 /* we might have given a more useful error above */
205 if (!*state->response.data.auth.error_string)
206 fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
207 state->response.data.auth.pam_error = nt_status_to_pam(result);
209 DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authentication for user %s returned %s (PAM: %d)\n",
210 state->request.data.auth.user,
211 state->response.data.auth.nt_status_string,
212 state->response.data.auth.pam_error));
215 talloc_destroy(mem_ctx);
217 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
220 /**********************************************************************
221 Challenge Response Authentication Protocol
222 **********************************************************************/
224 enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
227 unsigned char trust_passwd[16];
228 time_t last_change_time;
229 uint32 sec_channel_type;
230 NET_USER_INFO_3 info3;
231 struct cli_state *cli = NULL;
232 TALLOC_CTX *mem_ctx = NULL;
233 char *name_user = NULL;
234 const char *name_domain = NULL;
235 const char *workstation;
236 struct winbindd_domain *contact_domain;
241 DATA_BLOB lm_resp, nt_resp;
243 if (!state->privileged) {
244 char *error_string = NULL;
245 DEBUG(2, ("winbindd_pam_auth_crap: non-privileged access denied. !\n"));
246 DEBUGADD(2, ("winbindd_pam_auth_crap: Ensure permissions on %s are set correctly.\n",
247 get_winbind_priv_pipe_dir()));
248 /* send a better message than ACCESS_DENIED */
249 asprintf(&error_string, "winbind client not authorized to use winbindd_pam_auth_crap. Ensure permissions on %s are set correctly.",
250 get_winbind_priv_pipe_dir());
251 push_utf8_fstring(state->response.data.auth.error_string, error_string);
252 SAFE_FREE(error_string);
253 result = NT_STATUS_ACCESS_DENIED;
257 /* Ensure null termination */
258 state->request.data.auth_crap.user[sizeof(state->request.data.auth_crap.user)-1]=0;
259 state->request.data.auth_crap.domain[sizeof(state->request.data.auth_crap.domain)-1]=0;
261 if (!(mem_ctx = talloc_init("winbind pam auth crap for (utf8) %s", state->request.data.auth_crap.user))) {
262 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
263 result = NT_STATUS_NO_MEMORY;
267 if (pull_utf8_talloc(mem_ctx, &name_user, state->request.data.auth_crap.user) == (size_t)-1) {
268 DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
269 result = NT_STATUS_UNSUCCESSFUL;
273 if (*state->request.data.auth_crap.domain) {
275 if (pull_utf8_talloc(mem_ctx, &dom, state->request.data.auth_crap.domain) == (size_t)-1) {
276 DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
277 result = NT_STATUS_UNSUCCESSFUL;
281 } else if (lp_winbind_use_default_domain()) {
282 name_domain = lp_workgroup();
284 DEBUG(5,("no domain specified with username (%s) - failing auth\n",
286 result = NT_STATUS_NO_SUCH_USER;
290 DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n", (unsigned long)state->pid,
291 name_domain, name_user));
293 if (*state->request.data.auth_crap.workstation) {
295 if (pull_utf8_talloc(mem_ctx, &wrk, state->request.data.auth_crap.workstation) == (size_t)-1) {
296 DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
297 result = NT_STATUS_UNSUCCESSFUL;
302 workstation = global_myname();
305 if (state->request.data.auth_crap.lm_resp_len > sizeof(state->request.data.auth_crap.lm_resp)
306 || state->request.data.auth_crap.nt_resp_len > sizeof(state->request.data.auth_crap.nt_resp)) {
307 DEBUG(0, ("winbindd_pam_auth_crap: invalid password length %u/%u\n",
308 state->request.data.auth_crap.lm_resp_len,
309 state->request.data.auth_crap.nt_resp_len));
310 result = NT_STATUS_INVALID_PARAMETER;
314 lm_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.lm_resp, state->request.data.auth_crap.lm_resp_len);
315 nt_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.nt_resp, state->request.data.auth_crap.nt_resp_len);
317 /* what domain should we contact? */
320 /* what domain should we contact? */
323 if (!(contact_domain = find_domain_from_name(name_domain))) {
324 DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
325 state->request.data.auth.user, name_domain, name_user, name_domain));
326 result = NT_STATUS_NO_SUCH_USER;
331 if (is_myname(name_domain)) {
332 DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
333 result = NT_STATUS_NO_SUCH_USER;
337 if (!(contact_domain = find_our_domain())) {
338 DEBUG(1, ("Authenticatoin for [%s] -> [%s]\\[%s] in our domain failed - we can't find our domain!\n",
339 state->request.data.auth.user, name_domain, name_user));
340 result = NT_STATUS_NO_SUCH_USER;
345 if ( !get_trust_pw(contact_domain->name, trust_passwd, &last_change_time, &sec_channel_type) ) {
346 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
352 ZERO_STRUCT(ret_creds);
355 /* Don't shut this down - it belongs to the connection cache code */
356 result = cm_get_netlogon_cli(contact_domain, trust_passwd, sec_channel_type, False, &cli);
358 if (!NT_STATUS_IS_OK(result)) {
359 DEBUG(3, ("could not open handle to NETLOGON pipe (error: %s)\n",
364 result = cli_netlogon_sam_network_logon(cli, mem_ctx,
366 name_user, name_domain,
368 state->request.data.auth_crap.chal,
374 /* We have to try a second time as cm_get_netlogon_cli
375 might not yet have noticed that the DC has killed
378 if ( cli->fd == -1 ) {
383 /* if we get access denied, a possible cause was that we had and open
384 connection to the DC, but someone changed our machine account password
385 out from underneath us using 'net rpc changetrustpw' */
387 if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) ) {
388 DEBUG(3,("winbindd_pam_auth_crap: sam_logon returned ACCESS_DENIED. Maybe the trust account "
389 "password was changed and we didn't know it. Killing connections to domain %s\n",
390 contact_domain->name));
396 } while ( (attempts < 2) && retry );
398 clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
400 if (NT_STATUS_IS_OK(result)) {
401 netsamlogon_cache_store( cli->mem_ctx, &info3 );
402 wcache_invalidate_samlogon(find_domain_from_name(name_domain), &info3);
404 if (state->request.flags & WBFLAG_PAM_INFO3_NDR) {
405 result = append_info3_as_ndr(mem_ctx, state, &info3);
406 } else if (state->request.flags & WBFLAG_PAM_UNIX_NAME) {
407 /* ntlm_auth should return the unix username, per
408 'winbind use default domain' settings and the like */
410 fstring username_out;
411 const char *nt_username, *nt_domain;
412 if (!(nt_username = unistr2_tdup(mem_ctx, &(info3.uni_user_name)))) {
413 /* If the server didn't give us one, just use the one we sent them */
414 nt_username = name_user;
417 if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3.uni_logon_dom)))) {
418 /* If the server didn't give us one, just use the one we sent them */
419 nt_domain = name_domain;
422 fill_domain_username(username_out, nt_domain, nt_username);
424 DEBUG(5, ("Setting unix username to [%s]\n", username_out));
426 /* this interface is in UTF8 */
427 if (push_utf8_allocate((char **)&state->response.extra_data, username_out) == -1) {
428 result = NT_STATUS_NO_MEMORY;
431 state->response.length += strlen(state->response.extra_data)+1;
434 if (state->request.flags & WBFLAG_PAM_NTKEY) {
435 memcpy(state->response.data.auth.nt_session_key, info3.user_sess_key, sizeof(state->response.data.auth.nt_session_key) /* 16 */);
437 if (state->request.flags & WBFLAG_PAM_LMKEY) {
438 memcpy(state->response.data.auth.first_8_lm_hash, info3.padding, sizeof(state->response.data.auth.first_8_lm_hash) /* 8 */);
443 /* give us a more useful (more correct?) error code */
444 if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
445 result = NT_STATUS_NO_LOGON_SERVERS;
448 state->response.data.auth.nt_status = NT_STATUS_V(result);
449 push_utf8_fstring(state->response.data.auth.nt_status_string, nt_errstr(result));
451 /* we might have given a more useful error above */
452 if (!*state->response.data.auth.error_string)
453 push_utf8_fstring(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
454 state->response.data.auth.pam_error = nt_status_to_pam(result);
456 DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
457 ("NTLM CRAP authentication for user [%s]\\[%s] returned %s (PAM: %d)\n",
460 state->response.data.auth.nt_status_string,
461 state->response.data.auth.pam_error));
464 talloc_destroy(mem_ctx);
466 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
469 /* Change a user password */
471 enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
474 char *oldpass, *newpass;
475 fstring domain, user;
478 struct winbindd_domain *contact_domain;
480 DEBUG(3, ("[%5lu]: pam chauthtok %s\n", (unsigned long)state->pid,
481 state->request.data.chauthtok.user));
483 if (!(mem_ctx = talloc_init("winbind password change for (utf8) %s",
484 state->request.data.chauthtok.user))) {
485 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
486 result = NT_STATUS_NO_MEMORY;
493 return WINBINDD_ERROR;
495 parse_domain_user(state->request.data.chauthtok.user, domain, user);
497 if (!(contact_domain = find_domain_from_name(domain))) {
498 DEBUG(3, ("Cannot change password for [%s] -> [%s]\\[%s] as %s is not a trusted domain\n",
499 state->request.data.chauthtok.user, domain, user, domain));
500 result = NT_STATUS_NO_SUCH_USER;
504 /* Change password */
506 oldpass = state->request.data.chauthtok.oldpass;
507 newpass = state->request.data.chauthtok.newpass;
511 if ( NT_STATUS_IS_ERR(result = cm_get_sam_handle(contact_domain, &hnd)) ) {
512 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
516 if (!NT_STATUS_IS_OK(result = cli_samr_chgpasswd_user(hnd->cli, mem_ctx,
517 user, newpass, oldpass))) {
518 DEBUG(1, ("password change failed for user %s/%s\n", domain,
523 state->response.data.auth.nt_status = NT_STATUS_V(result);
524 fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
525 fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
526 state->response.data.auth.pam_error = nt_status_to_pam(result);
528 DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
529 ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n",
532 state->response.data.auth.nt_status_string,
533 state->response.data.auth.pam_error));
536 talloc_destroy(mem_ctx);
538 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;