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 Authenticate a user with a clear test password
58 **********************************************************************/
60 enum winbindd_result winbindd_pam_auth(struct winbindd_cli_state *state)
63 fstring name_domain, name_user;
64 unsigned char trust_passwd[16];
65 time_t last_change_time;
66 uint32 sec_channel_type;
67 NET_USER_INFO_3 info3;
68 struct cli_state *cli = NULL;
70 TALLOC_CTX *mem_ctx = NULL;
75 unsigned char local_lm_response[24];
76 unsigned char local_nt_response[24];
77 const char *contact_domain;
80 /* Ensure null termination */
81 state->request.data.auth.user[sizeof(state->request.data.auth.user)-1]='\0';
83 /* Ensure null termination */
84 state->request.data.auth.pass[sizeof(state->request.data.auth.pass)-1]='\0';
86 DEBUG(3, ("[%5lu]: pam auth %s\n", (unsigned long)state->pid,
87 state->request.data.auth.user));
89 if (!(mem_ctx = talloc_init("winbind pam auth for %s", state->request.data.auth.user))) {
90 DEBUG(0, ("winbindd_pam_auth: could not talloc_init()!\n"));
91 result = NT_STATUS_NO_MEMORY;
95 /* Parse domain and username */
97 parse_domain_user(state->request.data.auth.user, name_domain, name_user);
98 if ( !*name_domain ) {
99 DEBUG(5,("no domain separator (%s) in username (%s) - failing auth\n", lp_winbind_separator(), state->request.data.auth.user));
100 result = NT_STATUS_INVALID_PARAMETER;
104 /* do password magic */
106 generate_random_buffer(chal, 8, False);
107 SMBencrypt(state->request.data.auth.pass, chal, local_lm_response);
109 SMBNTencrypt(state->request.data.auth.pass, chal, local_nt_response);
111 lm_resp = data_blob_talloc(mem_ctx, local_lm_response, sizeof(local_lm_response));
112 nt_resp = data_blob_talloc(mem_ctx, local_nt_response, sizeof(local_nt_response));
114 if ( !get_trust_pw(name_domain, trust_passwd, &last_change_time, &sec_channel_type) ) {
115 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
119 /* what domain should we contact? */
122 contact_domain = name_domain;
124 contact_domain = lp_workgroup();
126 /* check authentication loop */
130 ZERO_STRUCT(ret_creds);
133 /* Don't shut this down - it belongs to the connection cache code */
134 result = cm_get_netlogon_cli(contact_domain, trust_passwd,
135 sec_channel_type, False, &cli);
137 if (!NT_STATUS_IS_OK(result)) {
138 DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
142 result = cli_netlogon_sam_network_logon(cli, mem_ctx,
144 name_user, name_domain,
145 global_myname(), chal,
150 /* We have to try a second time as cm_get_netlogon_cli
151 might not yet have noticed that the DC has killed
154 if ( cli->fd == -1 ) {
159 /* if we get access denied, a possible cuase was that we had and open
160 connection to the DC, but someone changed our machine account password
161 out from underneath us using 'net rpc changetrustpw' */
163 if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) ) {
164 DEBUG(3,("winbindd_pam_auth: sam_logon returned ACCESS_DENIED. Maybe the trust account "
165 "password was changed and we didn't know it. Killing connections to domain %s\n",
172 } while ( (attempts < 2) && retry );
174 clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
176 if (NT_STATUS_IS_OK(result)) {
177 netsamlogon_cache_store( cli->mem_ctx, &info3 );
178 wcache_invalidate_samlogon(find_domain_from_name(name_domain), &info3);
182 /* give us a more useful (more correct?) error code */
183 if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
184 result = NT_STATUS_NO_LOGON_SERVERS;
187 state->response.data.auth.nt_status = NT_STATUS_V(result);
188 fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
189 fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
190 state->response.data.auth.pam_error = nt_status_to_pam(result);
192 DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authentication for user %s returned %s (PAM: %d)\n",
193 state->request.data.auth.user,
194 state->response.data.auth.nt_status_string,
195 state->response.data.auth.pam_error));
198 talloc_destroy(mem_ctx);
200 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
203 /**********************************************************************
204 Challenge Response Authentication Protocol
205 **********************************************************************/
207 enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
210 unsigned char trust_passwd[16];
211 time_t last_change_time;
212 uint32 sec_channel_type;
213 NET_USER_INFO_3 info3;
214 struct cli_state *cli = NULL;
215 TALLOC_CTX *mem_ctx = NULL;
217 const char *domain = NULL;
218 const char *workstation;
219 const char *contact_domain;
224 DATA_BLOB lm_resp, nt_resp;
226 if (!state->privileged) {
227 char *error_string = NULL;
228 DEBUG(2, ("winbindd_pam_auth_crap: non-privileged access denied. !\n"));
229 DEBUGADD(2, ("winbindd_pam_auth_crap: Ensure permissions on %s are set correctly.\n",
230 get_winbind_priv_pipe_dir()));
231 /* send a better message than ACCESS_DENIED */
232 asprintf(&error_string, "winbind client not authorized to use winbindd_pam_auth_crap. Ensure permissions on %s are set correctly.",
233 get_winbind_priv_pipe_dir());
234 push_utf8_fstring(state->response.data.auth.error_string, error_string);
235 SAFE_FREE(error_string);
236 result = NT_STATUS_ACCESS_DENIED;
240 /* Ensure null termination */
241 state->request.data.auth_crap.user[sizeof(state->request.data.auth_crap.user)-1]=0;
242 state->request.data.auth_crap.domain[sizeof(state->request.data.auth_crap.domain)-1]=0;
244 if (!(mem_ctx = talloc_init("winbind pam auth crap for (utf8) %s", state->request.data.auth_crap.user))) {
245 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
246 result = NT_STATUS_NO_MEMORY;
250 if (pull_utf8_talloc(mem_ctx, &user, state->request.data.auth_crap.user) == (size_t)-1) {
251 DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
252 result = NT_STATUS_UNSUCCESSFUL;
256 if (*state->request.data.auth_crap.domain) {
258 if (pull_utf8_talloc(mem_ctx, &dom, state->request.data.auth_crap.domain) == (size_t)-1) {
259 DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
260 result = NT_STATUS_UNSUCCESSFUL;
264 } else if (lp_winbind_use_default_domain()) {
265 domain = lp_workgroup();
267 DEBUG(5,("no domain specified with username (%s) - failing auth\n",
269 result = NT_STATUS_INVALID_PARAMETER;
273 DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n", (unsigned long)state->pid,
276 if ( !get_trust_pw(domain, trust_passwd, &last_change_time, &sec_channel_type) ) {
277 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
281 if (*state->request.data.auth_crap.workstation) {
283 if (pull_utf8_talloc(mem_ctx, &wrk, state->request.data.auth_crap.workstation) == (size_t)-1) {
284 DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
285 result = NT_STATUS_UNSUCCESSFUL;
290 workstation = global_myname();
293 if (state->request.data.auth_crap.lm_resp_len > sizeof(state->request.data.auth_crap.lm_resp)
294 || state->request.data.auth_crap.nt_resp_len > sizeof(state->request.data.auth_crap.nt_resp)) {
295 DEBUG(0, ("winbindd_pam_auth_crap: invalid password length %u/%u\n",
296 state->request.data.auth_crap.lm_resp_len,
297 state->request.data.auth_crap.nt_resp_len));
298 result = NT_STATUS_INVALID_PARAMETER;
302 lm_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.lm_resp, state->request.data.auth_crap.lm_resp_len);
303 nt_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.nt_resp, state->request.data.auth_crap.nt_resp_len);
305 /* what domain should we contact? */
308 contact_domain = domain;
310 contact_domain = lp_workgroup();
314 ZERO_STRUCT(ret_creds);
317 /* Don't shut this down - it belongs to the connection cache code */
318 result = cm_get_netlogon_cli(contact_domain, trust_passwd, sec_channel_type, False, &cli);
320 if (!NT_STATUS_IS_OK(result)) {
321 DEBUG(3, ("could not open handle to NETLOGON pipe (error: %s)\n",
326 result = cli_netlogon_sam_network_logon(cli, mem_ctx,
330 state->request.data.auth_crap.chal,
336 /* We have to try a second time as cm_get_netlogon_cli
337 might not yet have noticed that the DC has killed
340 if ( cli->fd == -1 ) {
345 /* if we get access denied, a possible cause was that we had and open
346 connection to the DC, but someone changed our machine account password
347 out from underneath us using 'net rpc changetrustpw' */
349 if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) ) {
350 DEBUG(3,("winbindd_pam_auth_crap: sam_logon returned ACCESS_DENIED. Maybe the trust account "
351 "password was changed and we didn't know it. Killing connections to domain %s\n",
358 } while ( (attempts < 2) && retry );
360 clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
362 if (NT_STATUS_IS_OK(result)) {
363 netsamlogon_cache_store( cli->mem_ctx, &info3 );
364 wcache_invalidate_samlogon(find_domain_from_name(domain), &info3);
366 if (state->request.flags & WBFLAG_PAM_INFO3_NDR) {
367 result = append_info3_as_ndr(mem_ctx, state, &info3);
368 } else if (state->request.flags & WBFLAG_PAM_UNIX_NAME) {
369 /* ntlm_auth should return the unix username, per
370 'winbind use default domain' settings and the like */
372 fstring username_out;
373 const char *nt_username, *nt_domain;
374 if (!(nt_username = unistr2_tdup(mem_ctx, &(info3.uni_user_name)))) {
375 /* If the server didn't give us one, just use the one we sent them */
379 if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3.uni_logon_dom)))) {
380 /* If the server didn't give us one, just use the one we sent them */
384 fill_domain_username(username_out, nt_domain, nt_username);
386 DEBUG(5, ("Setting unix username to [%s]\n", username_out));
388 /* this interface is in UTF8 */
389 if (push_utf8_allocate((char **)&state->response.extra_data, username_out) == -1) {
390 result = NT_STATUS_NO_MEMORY;
393 state->response.length += strlen(state->response.extra_data)+1;
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 */);
405 /* give us a more useful (more correct?) error code */
406 if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
407 result = NT_STATUS_NO_LOGON_SERVERS;
410 state->response.data.auth.nt_status = NT_STATUS_V(result);
411 push_utf8_fstring(state->response.data.auth.nt_status_string, nt_errstr(result));
413 /* we might have given a more useful error above */
414 if (!*state->response.data.auth.error_string)
415 push_utf8_fstring(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
416 state->response.data.auth.pam_error = nt_status_to_pam(result);
418 DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
419 ("NTLM CRAP authentication for user [%s]\\[%s] returned %s (PAM: %d)\n",
422 state->response.data.auth.nt_status_string,
423 state->response.data.auth.pam_error));
426 talloc_destroy(mem_ctx);
428 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
431 /* Change a user password */
433 enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
436 char *oldpass, *newpass;
437 fstring domain, user;
440 DEBUG(3, ("[%5lu]: pam chauthtok %s\n", (unsigned long)state->pid,
441 state->request.data.chauthtok.user));
446 return WINBINDD_ERROR;
448 parse_domain_user(state->request.data.chauthtok.user, domain, user);
450 result = NT_STATUS_INVALID_PARAMETER;
454 /* Change password */
456 oldpass = state->request.data.chauthtok.oldpass;
457 newpass = state->request.data.chauthtok.newpass;
461 if ( NT_STATUS_IS_ERR(result = cm_get_sam_handle(domain, &hnd)) ) {
462 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
466 if (!cli_oem_change_password(hnd->cli, user, newpass, oldpass)) {
467 DEBUG(1, ("password change failed for user %s/%s\n", domain,
469 result = NT_STATUS_WRONG_PASSWORD;
471 result = NT_STATUS_OK;
475 state->response.data.auth.nt_status = NT_STATUS_V(result);
476 fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
477 fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
478 state->response.data.auth.pam_error = nt_status_to_pam(result);
480 DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
481 ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n",
484 state->response.data.auth.nt_status_string,
485 state->response.data.auth.pam_error));
487 return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;