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.
27 #define DBGC_CLASS DBGC_WINBIND
30 static NTSTATUS append_info3_as_ndr(TALLOC_CTX *mem_ctx,
31 struct winbindd_cli_state *state,
32 NET_USER_INFO_3 *info3)
36 if (!prs_init(&ps, 256 /* Random, non-zero number */, mem_ctx, MARSHALL)) {
37 return NT_STATUS_NO_MEMORY;
39 if (!net_io_user_info3("", info3, &ps, 1, 3)) {
41 return NT_STATUS_UNSUCCESSFUL;
44 size = prs_data_size(&ps);
45 state->response.extra_data = malloc(size);
46 if (!state->response.extra_data) {
48 return NT_STATUS_NO_MEMORY;
50 prs_copy_all_data_out(state->response.extra_data, &ps);
51 state->response.length += size;
56 /*******************************************************************
57 wrapper around retreiving the trsut account password
58 *******************************************************************/
60 static BOOL get_trust_pw(const char *domain, uint8 ret_pwd[16],
61 time_t *pass_last_set_time, uint32 *channel)
66 /* if we are a DC and this is not our domain, then lookup an account
67 for the domain trust */
69 if ( IS_DC && !strequal(domain, lp_workgroup()) && lp_allow_trusted_domains() )
71 if ( !secrets_fetch_trusted_domain_password(domain, &pwd, &sid,
74 DEBUG(0, ("get_trust_pw: could not fetch trust account "
75 "password for trusted domain %s\n", domain));
79 *channel = SEC_CHAN_DOMAIN;
80 E_md4hash(pwd, ret_pwd);
85 else /* just get the account for our domain (covers
86 ROLE_DOMAIN_MEMBER as well */
88 /* get the machine trust account for our domain */
90 if ( !secrets_fetch_trust_account_password (lp_workgroup(), ret_pwd,
91 pass_last_set_time, channel) )
93 DEBUG(0, ("get_trust_pw: could not fetch trust account "
94 "password for my domain %s\n", domain));
105 /**********************************************************************
106 Authenticate a user with a clear test password
107 **********************************************************************/
109 enum winbindd_result winbindd_pam_auth(struct winbindd_cli_state *state)
112 fstring name_domain, name_user;
113 unsigned char trust_passwd[16];
114 time_t last_change_time;
115 uint32 sec_channel_type;
116 NET_USER_INFO_3 info3;
117 struct cli_state *cli = NULL;
119 TALLOC_CTX *mem_ctx = NULL;
124 unsigned char local_lm_response[24];
125 unsigned char local_nt_response[24];
126 const char *contact_domain;
128 /* Ensure null termination */
129 state->request.data.auth.user[sizeof(state->request.data.auth.user)-1]='\0';
131 /* Ensure null termination */
132 state->request.data.auth.pass[sizeof(state->request.data.auth.pass)-1]='\0';
134 DEBUG(3, ("[%5d]: pam auth %s\n", state->pid,
135 state->request.data.auth.user));
137 if (!(mem_ctx = talloc_init("winbind pam auth for %s", state->request.data.auth.user))) {
138 DEBUG(0, ("winbindd_pam_auth: could not talloc_init()!\n"));
139 result = NT_STATUS_NO_MEMORY;
143 /* Parse domain and username */
145 parse_domain_user(state->request.data.auth.user, name_domain, name_user);
146 if ( !name_domain ) {
147 DEBUG(5,("no domain separator (%s) in username (%s) - failing auth\n", lp_winbind_separator(), state->request.data.auth.user));
148 result = NT_STATUS_INVALID_PARAMETER;
152 /* do password magic */
154 generate_random_buffer(chal, 8, False);
155 SMBencrypt(state->request.data.auth.pass, chal, local_lm_response);
157 SMBNTencrypt(state->request.data.auth.pass, chal, local_nt_response);
159 lm_resp = data_blob_talloc(mem_ctx, local_lm_response, sizeof(local_lm_response));
160 nt_resp = data_blob_talloc(mem_ctx, local_nt_response, sizeof(local_nt_response));
162 if ( !get_trust_pw(name_domain, trust_passwd, &last_change_time, &sec_channel_type) ) {
163 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
167 /* what domain should we contact? */
170 contact_domain = name_domain;
172 contact_domain = lp_workgroup();
174 /* check authentication loop */
178 ZERO_STRUCT(ret_creds);
180 /* Don't shut this down - it belongs to the connection cache code */
181 result = cm_get_netlogon_cli(contact_domain, trust_passwd,
182 sec_channel_type, False, &cli);
184 if (!NT_STATUS_IS_OK(result)) {
185 DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
189 result = cli_netlogon_sam_network_logon(cli, mem_ctx,
191 name_user, name_domain,
192 global_myname(), chal,
197 /* if we get access denied, a possible cuase was that we had and open
198 connection to the DC, but someone changed our machine accoutn password
199 out from underneath us using 'net rpc changetrustpw' */
201 if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) ) {
202 DEBUG(3,("winbindd_pam_auth: sam_logon returned ACCESS_DENIED. Maybe the trust account "
203 "password was changed and we didn't know it. Killing connections to domain %s\n",
209 /* We have to try a second time as cm_get_netlogon_cli
210 might not yet have noticed that the DC has killed
213 } while ( (attempts < 2) && (cli->fd == -1) );
216 clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
218 if (NT_STATUS_IS_OK(result)) {
219 netsamlogon_cache_store( cli->mem_ctx, &info3 );
220 wcache_invalidate_samlogon(find_domain_from_name(name_domain), &info3);
226 /* give us a more useful (more correct?) error code */
227 if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
228 result = NT_STATUS_NO_LOGON_SERVERS;
231 state->response.data.auth.nt_status = NT_STATUS_V(result);
232 fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
233 fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
234 state->response.data.auth.pam_error = nt_status_to_pam(result);
236 DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authentication for user %s returned %s (PAM: %d)\n",
237 state->request.data.auth.user,
238 state->response.data.auth.nt_status_string,
239 state->response.data.auth.pam_error));
242 talloc_destroy(mem_ctx);
244 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
247 /**********************************************************************
248 Challenge Response Authentication Protocol
249 **********************************************************************/
251 enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
254 unsigned char trust_passwd[16];
255 time_t last_change_time;
256 uint32 sec_channel_type;
257 NET_USER_INFO_3 info3;
258 struct cli_state *cli = NULL;
259 TALLOC_CTX *mem_ctx = NULL;
261 const char *domain = NULL;
262 const char *workstation;
263 const char *contact_domain;
267 DATA_BLOB lm_resp, nt_resp;
269 if (!state->privileged) {
270 DEBUG(2, ("winbindd_pam_auth_crap: non-privileged access denied!\n"));
271 /* send a better message than ACCESS_DENIED */
272 push_utf8_fstring(state->response.data.auth.error_string, "winbind client not authorized to use winbindd_pam_auth_crap");
273 result = NT_STATUS_ACCESS_DENIED;
277 /* Ensure null termination */
278 state->request.data.auth_crap.user[sizeof(state->request.data.auth_crap.user)-1]='\0';
280 /* Ensure null termination */
281 state->request.data.auth_crap.domain[sizeof(state->request.data.auth_crap.domain)-1]='\0';
283 if (!(mem_ctx = talloc_init("winbind pam auth crap for (utf8) %s", state->request.data.auth_crap.user))) {
284 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
285 result = NT_STATUS_NO_MEMORY;
289 if (pull_utf8_talloc(mem_ctx, &user, state->request.data.auth_crap.user) == (size_t)-1) {
290 DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
293 if (*state->request.data.auth_crap.domain) {
295 if (pull_utf8_talloc(mem_ctx, &dom, state->request.data.auth_crap.domain) == (size_t)-1) {
296 DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
299 } else if (lp_winbind_use_default_domain()) {
300 domain = lp_workgroup();
302 DEBUG(5,("no domain specified with username (%s) - failing auth\n",
304 result = NT_STATUS_INVALID_PARAMETER;
308 DEBUG(3, ("[%5d]: pam auth crap domain: %s user: %s\n", state->pid,
311 if ( !get_trust_pw(domain, trust_passwd, &last_change_time, &sec_channel_type) ) {
312 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
316 if (*state->request.data.auth_crap.workstation) {
318 if (pull_utf8_talloc(mem_ctx, &wrk, state->request.data.auth_crap.workstation) == (size_t)-1) {
319 DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
323 workstation = global_myname();
326 if (state->request.data.auth_crap.lm_resp_len > sizeof(state->request.data.auth_crap.lm_resp)
327 || state->request.data.auth_crap.nt_resp_len > sizeof(state->request.data.auth_crap.nt_resp)) {
328 DEBUG(0, ("winbindd_pam_auth_crap: invalid password length %u/%u\n",
329 state->request.data.auth_crap.lm_resp_len,
330 state->request.data.auth_crap.nt_resp_len));
331 result = NT_STATUS_INVALID_PARAMETER;
335 lm_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.lm_resp, state->request.data.auth_crap.lm_resp_len);
336 nt_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.nt_resp, state->request.data.auth_crap.nt_resp_len);
338 /* what domain should we contact? */
341 contact_domain = domain;
343 contact_domain = lp_workgroup();
347 ZERO_STRUCT(ret_creds);
349 /* Don't shut this down - it belongs to the connection cache code */
350 result = cm_get_netlogon_cli(contact_domain, trust_passwd, sec_channel_type, False, &cli);
352 if (!NT_STATUS_IS_OK(result)) {
353 DEBUG(3, ("could not open handle to NETLOGON pipe (error: %s)\n",
358 result = cli_netlogon_sam_network_logon(cli, mem_ctx,
362 state->request.data.auth_crap.chal,
368 /* if we get access denied, a possible cuase was that we had and open
369 connection to the DC, but someone changed our machine accoutn password
370 out from underneath us using 'net rpc changetrustpw' */
372 if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) ) {
373 DEBUG(3,("winbindd_pam_auth_crap: sam_logon returned ACCESS_DENIED. Maybe the trust account "
374 "password was changed and we didn't know it. Killing connections to domain %s\n",
380 /* We have to try a second time as cm_get_netlogon_cli
381 might not yet have noticed that the DC has killed
384 } while ( (attempts < 2) && (cli->fd == -1) );
386 clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
388 if (NT_STATUS_IS_OK(result)) {
389 netsamlogon_cache_store( cli->mem_ctx, &info3 );
390 wcache_invalidate_samlogon(find_domain_from_name(domain), &info3);
392 if (state->request.flags & WBFLAG_PAM_INFO3_NDR) {
393 result = append_info3_as_ndr(mem_ctx, state, &info3);
396 if (state->request.flags & WBFLAG_PAM_NTKEY) {
397 memcpy(state->response.data.auth.nt_session_key, info3.user_sess_key, sizeof(state->response.data.auth.nt_session_key) /* 16 */);
399 if (state->request.flags & WBFLAG_PAM_LMKEY) {
400 memcpy(state->response.data.auth.first_8_lm_hash, info3.padding, sizeof(state->response.data.auth.first_8_lm_hash) /* 8 */);
406 /* give us a more useful (more correct?) error code */
407 if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
408 result = NT_STATUS_NO_LOGON_SERVERS;
411 state->response.data.auth.nt_status = NT_STATUS_V(result);
412 push_utf8_fstring(state->response.data.auth.nt_status_string, nt_errstr(result));
413 if (!*state->response.data.auth.error_string)
414 push_utf8_fstring(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
415 state->response.data.auth.pam_error = nt_status_to_pam(result);
417 DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
418 ("NTLM CRAP authentication for user [%s]\\[%s] returned %s (PAM: %d)\n",
421 state->response.data.auth.nt_status_string,
422 state->response.data.auth.pam_error));
425 talloc_destroy(mem_ctx);
427 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
430 /* Change a user password */
432 enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
435 char *oldpass, *newpass;
436 fstring domain, user;
439 DEBUG(3, ("[%5d]: pam chauthtok %s\n", state->pid,
440 state->request.data.chauthtok.user));
445 return WINBINDD_ERROR;
447 parse_domain_user(state->request.data.chauthtok.user, domain, user);
449 result = NT_STATUS_INVALID_PARAMETER;
453 /* Change password */
455 oldpass = state->request.data.chauthtok.oldpass;
456 newpass = state->request.data.chauthtok.newpass;
460 if ( NT_STATUS_IS_ERR(result = cm_get_sam_handle(domain, &hnd)) ) {
461 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
465 if (!cli_oem_change_password(hnd->cli, user, newpass, oldpass)) {
466 DEBUG(1, ("password change failed for user %s/%s\n", domain,
468 result = NT_STATUS_WRONG_PASSWORD;
470 result = NT_STATUS_OK;
474 state->response.data.auth.nt_status = NT_STATUS_V(result);
475 fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
476 fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
477 state->response.data.auth.pam_error = nt_status_to_pam(result);
479 DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
480 ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n",
483 state->response.data.auth.nt_status_string,
484 state->response.data.auth.pam_error));
486 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;