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r19711: grab the deadtime parameter fix for 3.0.23d
[Samba/gbeck.git] / source / nsswitch / pam_winbind.c
blob069d15d646498f582e2a5c2c163ce04bcfa9d9da
1 /* pam_winbind module
2
3 Copyright Andrew Tridgell <tridge@samba.org> 2000
4 Copyright Tim Potter <tpot@samba.org> 2000
5 Copyright Andrew Bartlett <abartlet@samba.org> 2002
6 Copyright Guenther Deschner <gd@samba.org> 2005-2006
7
8 largely based on pam_userdb by Cristian Gafton <gafton@redhat.com>
9 also contains large slabs of code from pam_unix by Elliot Lee <sopwith@redhat.com>
10 (see copyright below for full details)
11 */
12
13 #include "pam_winbind.h"
14
15 /* data tokens */
16
17 #define MAX_PASSWD_TRIES 3
18
19 /* some syslogging */
20 static void _pam_log(int err, const char *format, ...)
21 {
22 va_list args;
23
24 va_start(args, format);
25 openlog(MODULE_NAME, LOG_CONS|LOG_PID, LOG_AUTH);
26 vsyslog(err, format, args);
27 va_end(args);
28 closelog();
29 }
30
31 static void _pam_log_debug(int ctrl, int err, const char *format, ...)
32 {
33 va_list args;
34
35 if (!(ctrl & WINBIND_DEBUG_ARG)) {
36 return;
37 }
38
39 va_start(args, format);
40 openlog(MODULE_NAME, LOG_CONS|LOG_PID, LOG_AUTH);
41 vsyslog(err, format, args);
42 va_end(args);
43 closelog();
44 }
45
46 static int _pam_parse(int argc, const char **argv, dictionary **d)
47 {
48 int ctrl = 0;
49 const char *config_file = NULL;
50 int i;
51 const char **v;
52
53 if (d == NULL) {
54 goto config_from_pam;
55 }
56
57 for (i=argc,v=argv; i-- > 0; ++v) {
58 if (!strncasecmp(*v, "config", strlen("config"))) {
59 ctrl |= WINBIND_CONFIG_FILE;
60 config_file = v[i];
61 break;
62 }
63 }
64
65 if (config_file == NULL) {
66 config_file = PAM_WINBIND_CONFIG_FILE;
67 }
68
69 *d = iniparser_load(CONST_DISCARD(char *, config_file));
70 if (*d == NULL) {
71 goto config_from_pam;
72 }
73
74 if (iniparser_getboolean(*d, CONST_DISCARD(char *, "global:debug"), False)) {
75 ctrl |= WINBIND_DEBUG_ARG;
76 }
77
78 if (iniparser_getboolean(*d, CONST_DISCARD(char *, "global:cached_login"), False)) {
79 ctrl |= WINBIND_CACHED_LOGIN;
80 }
81
82 if (iniparser_getboolean(*d, CONST_DISCARD(char *, "global:krb5_auth"), False)) {
83 ctrl |= WINBIND_KRB5_AUTH;
84 }
85
86 if (iniparser_getstr(*d, CONST_DISCARD(char *,"global:krb5_ccache_type")) != NULL) {
87 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
88 }
89
90 if ((iniparser_getstr(*d, CONST_DISCARD(char *, "global:require-membership-of")) != NULL) ||
91 (iniparser_getstr(*d, CONST_DISCARD(char *, "global:require_membership_of")) != NULL)) {
92 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
93 }
94
95 config_from_pam:
96 /* step through arguments */
97 for (i=argc,v=argv; i-- > 0; ++v) {
98
99 /* generic options */
100 if (!strcmp(*v,"debug"))
101 ctrl |= WINBIND_DEBUG_ARG;
102 else if (!strcasecmp(*v, "use_authtok"))
103 ctrl |= WINBIND_USE_AUTHTOK_ARG;
104 else if (!strcasecmp(*v, "use_first_pass"))
105 ctrl |= WINBIND_USE_FIRST_PASS_ARG;
106 else if (!strcasecmp(*v, "try_first_pass"))
107 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
108 else if (!strcasecmp(*v, "unknown_ok"))
109 ctrl |= WINBIND_UNKNOWN_OK_ARG;
110 else if (!strncasecmp(*v, "require_membership_of", strlen("require_membership_of")))
111 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
112 else if (!strncasecmp(*v, "require-membership-of", strlen("require-membership-of")))
113 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
114 else if (!strcasecmp(*v, "krb5_auth"))
115 ctrl |= WINBIND_KRB5_AUTH;
116 else if (!strncasecmp(*v, "krb5_ccache_type", strlen("krb5_ccache_type")))
117 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
118 else if (!strcasecmp(*v, "cached_login"))
119 ctrl |= WINBIND_CACHED_LOGIN;
120 else {
121 _pam_log(LOG_ERR, "pam_parse: unknown option; %s", *v);
122 }
123
124 }
125 return ctrl;
126 };
127
128 static void _pam_winbind_cleanup_func(pam_handle_t *pamh, void *data, int error_status)
129 {
130 SAFE_FREE(data);
131 }
132
133 static const struct ntstatus_errors {
134 const char *ntstatus_string;
135 const char *error_string;
136 } ntstatus_errors[] = {
137 {"NT_STATUS_OK", "Success"},
138 {"NT_STATUS_BACKUP_CONTROLLER", "No primary Domain Controler available"},
139 {"NT_STATUS_PWD_TOO_SHORT", "Password too short"},
140 {"NT_STATUS_PWD_TOO_RECENT", "The password of this user is too recent to change"},
141 {"NT_STATUS_PWD_HISTORY_CONFLICT", "Password is already in password history"},
142 {"NT_STATUS_PASSWORD_EXPIRED", "Your password has expired"},
143 {"NT_STATUS_PASSWORD_MUST_CHANGE", "You need to change your password now"},
144 {"NT_STATUS_INVALID_WORKSTATION", "You are not allowed to logon from this workstation"},
145 {"NT_STATUS_INVALID_LOGON_HOURS", "You are not allowed to logon at this time"},
146 {"NT_STATUS_ACCOUNT_EXPIRED", "Your account has expired. Please contact your System administrator"}, /* SCNR */
147 {"NT_STATUS_ACCOUNT_DISABLED", "Your account is disabled. Please contact your System administrator"}, /* SCNR */
148 {"NT_STATUS_ACCOUNT_LOCKED_OUT", "Your account has been locked. Please contact your System administrator"}, /* SCNR */
149 {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT", "Invalid Trust Account"},
150 {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT", "Invalid Trust Account"},
151 {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT", "Invalid Trust Account"},
152 {"NT_STATUS_ACCESS_DENIED", "Access is denied"},
153 {NULL, NULL}
154 };
155
156 const char *_get_ntstatus_error_string(const char *nt_status_string)
157 {
158 int i;
159 for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
160 if (!strcasecmp(ntstatus_errors[i].ntstatus_string, nt_status_string)) {
161 return ntstatus_errors[i].error_string;
162 }
163 }
164 return NULL;
165 }
166
167 /* --- authentication management functions --- */
168
169 /* Attempt a conversation */
170
171 static int converse(pam_handle_t *pamh, int nargs,
172 struct pam_message **message,
173 struct pam_response **response)
174 {
175 int retval;
176 struct pam_conv *conv;
177
178 retval = pam_get_item(pamh, PAM_CONV, (const void **) &conv );
179 if (retval == PAM_SUCCESS) {
180 retval = conv->conv(nargs, (const struct pam_message **)message,
181 response, conv->appdata_ptr);
182 }
183
184 return retval; /* propagate error status */
185 }
186
187
188 static int _make_remark(pam_handle_t * pamh, int type, const char *text)
189 {
190 int retval = PAM_SUCCESS;
191
192 struct pam_message *pmsg[1], msg[1];
193 struct pam_response *resp;
194
195 pmsg[0] = &msg[0];
196 msg[0].msg = CONST_DISCARD(char *, text);
197 msg[0].msg_style = type;
198
199 resp = NULL;
200 retval = converse(pamh, 1, pmsg, &resp);
201
202 if (resp) {
203 _pam_drop_reply(resp, 1);
204 }
205 return retval;
206 }
207
208 static int _make_remark_format(pam_handle_t * pamh, int type, const char *format, ...)
209 {
210 va_list args;
211 char *var;
212 int ret;
213
214 va_start(args, format);
215 vasprintf(&var, format, args);
216 va_end(args);
217
218 ret = _make_remark(pamh, type, var);
219 SAFE_FREE(var);
220 return ret;
221 }
222
223 static int pam_winbind_request(pam_handle_t * pamh, int ctrl,
224 enum winbindd_cmd req_type,
225 struct winbindd_request *request,
226 struct winbindd_response *response)
227 {
228 /* Fill in request and send down pipe */
229 init_request(request, req_type);
230
231 if (write_sock(request, sizeof(*request), 0) == -1) {
232 _pam_log(LOG_ERR, "write to socket failed!");
233 close_sock();
234 return PAM_SERVICE_ERR;
235 }
236
237 /* Wait for reply */
238 if (read_reply(response) == -1) {
239 _pam_log(LOG_ERR, "read from socket failed!");
240 close_sock();
241 return PAM_SERVICE_ERR;
242 }
243
244 /* We are done with the socket - close it and avoid mischeif */
245 close_sock();
246
247 /* Copy reply data from socket */
248 if (response->result != WINBINDD_OK) {
249 if (response->data.auth.pam_error != PAM_SUCCESS) {
250 _pam_log(LOG_ERR, "request failed: %s, PAM error was %s (%d), NT error was %s",
251 response->data.auth.error_string,
252 pam_strerror(pamh, response->data.auth.pam_error),
253 response->data.auth.pam_error,
254 response->data.auth.nt_status_string);
255 return response->data.auth.pam_error;
256 } else {
257 _pam_log(LOG_ERR, "request failed, but PAM error 0!");
258 return PAM_SERVICE_ERR;
259 }
260 }
261
262 return PAM_SUCCESS;
263 }
264
265 static int pam_winbind_request_log(pam_handle_t * pamh,
266 int ctrl,
267 enum winbindd_cmd req_type,
268 struct winbindd_request *request,
269 struct winbindd_response *response,
270 const char *user)
271 {
272 int retval;
273
274 retval = pam_winbind_request(pamh, ctrl, req_type, request, response);
275
276 switch (retval) {
277 case PAM_AUTH_ERR:
278 /* incorrect password */
279 _pam_log(LOG_WARNING, "user `%s' denied access (incorrect password or invalid membership)", user);
280 return retval;
281 case PAM_ACCT_EXPIRED:
282 /* account expired */
283 _pam_log(LOG_WARNING, "user `%s' account expired", user);
284 return retval;
285 case PAM_AUTHTOK_EXPIRED:
286 /* password expired */
287 _pam_log(LOG_WARNING, "user `%s' password expired", user);
288 return retval;
289 case PAM_NEW_AUTHTOK_REQD:
290 /* new password required */
291 _pam_log(LOG_WARNING, "user `%s' new password required", user);
292 return retval;
293 case PAM_USER_UNKNOWN:
294 /* the user does not exist */
295 _pam_log_debug(ctrl, LOG_NOTICE, "user `%s' not found", user);
296 if (ctrl & WINBIND_UNKNOWN_OK_ARG) {
297 return PAM_IGNORE;
298 }
299 return retval;
300 case PAM_SUCCESS:
301 if (req_type == WINBINDD_PAM_AUTH) {
302 /* Otherwise, the authentication looked good */
303 _pam_log(LOG_NOTICE, "user '%s' granted access", user);
304 } else if (req_type == WINBINDD_PAM_CHAUTHTOK) {
305 /* Otherwise, the authentication looked good */
306 _pam_log(LOG_NOTICE, "user '%s' password changed", user);
307 } else {
308 /* Otherwise, the authentication looked good */
309 _pam_log(LOG_NOTICE, "user '%s' OK", user);
310 }
311
312 return retval;
313 default:
314 /* we don't know anything about this return value */
315 _pam_log(LOG_ERR, "internal module error (retval = %d, user = `%s')",
316 retval, user);
317 return retval;
318 }
319 }
320
321 /* talk to winbindd */
322 static int winbind_auth_request(pam_handle_t * pamh,
323 int ctrl,
324 const char *user,
325 const char *pass,
326 const char *member,
327 const char *cctype,
328 int process_result,
329 time_t *pwd_last_set)
330 {
331 struct winbindd_request request;
332 struct winbindd_response response;
333 int ret;
334
335 ZERO_STRUCT(request);
336 ZERO_STRUCT(response);
337
338 if (pwd_last_set) {
339 *pwd_last_set = 0;
340 }
341
342 strncpy(request.data.auth.user, user,
343 sizeof(request.data.auth.user)-1);
344
345 strncpy(request.data.auth.pass, pass,
346 sizeof(request.data.auth.pass)-1);
347
348 request.data.auth.krb5_cc_type[0] = '\0';
349 request.data.auth.uid = -1;
350
351 request.flags = WBFLAG_PAM_INFO3_TEXT | WBFLAG_PAM_CONTACT_TRUSTDOM;
352
353 if (ctrl & WINBIND_KRB5_AUTH) {
354
355 struct passwd *pwd = NULL;
356
357 _pam_log_debug(ctrl, LOG_DEBUG, "enabling krb5 login flag\n");
358
359 request.flags |= WBFLAG_PAM_KRB5 | WBFLAG_PAM_FALLBACK_AFTER_KRB5;
360
361 pwd = getpwnam(user);
362 if (pwd == NULL) {
363 return PAM_USER_UNKNOWN;
364 }
365 request.data.auth.uid = pwd->pw_uid;
366 }
367
368 if (ctrl & WINBIND_CACHED_LOGIN) {
369 _pam_log_debug(ctrl, LOG_DEBUG, "enabling cached login flag\n");
370 request.flags |= WBFLAG_PAM_CACHED_LOGIN;
371 }
372
373 if (cctype != NULL) {
374 strncpy(request.data.auth.krb5_cc_type, cctype,
375 sizeof(request.data.auth.krb5_cc_type) - 1);
376 _pam_log_debug(ctrl, LOG_DEBUG, "enabling request for a %s krb5 ccache\n", cctype);
377 }
378
379 request.data.auth.require_membership_of_sid[0] = '\0';
380
381 if (member != NULL) {
382 strncpy(request.data.auth.require_membership_of_sid, member,
383 sizeof(request.data.auth.require_membership_of_sid)-1);
384 }
385
386 /* lookup name? */
387 if ( (member != NULL) && (strncmp("S-", member, 2) != 0) ) {
388
389 struct winbindd_request sid_request;
390 struct winbindd_response sid_response;
391
392 ZERO_STRUCT(sid_request);
393 ZERO_STRUCT(sid_response);
394
395 _pam_log_debug(ctrl, LOG_DEBUG, "no sid given, looking up: %s\n", member);
396
397 /* fortunatly winbindd can handle non-separated names */
398 strncpy(sid_request.data.name.name, member,
399 sizeof(sid_request.data.name.name) - 1);
400
401 if (pam_winbind_request_log(pamh, ctrl, WINBINDD_LOOKUPNAME, &sid_request, &sid_response, user)) {
402 _pam_log(LOG_INFO, "could not lookup name: %s\n", member);
403 return PAM_AUTH_ERR;
404 }
405
406 member = sid_response.data.sid.sid;
407
408 strncpy(request.data.auth.require_membership_of_sid, member,
409 sizeof(request.data.auth.require_membership_of_sid)-1);
410 }
411
412 ret = pam_winbind_request_log(pamh, ctrl, WINBINDD_PAM_AUTH, &request, &response, user);
413
414 if (pwd_last_set) {
415 *pwd_last_set = response.data.auth.info3.pass_last_set_time;
416 }
417
418 if ((ctrl & WINBIND_KRB5_AUTH) &&
419 response.data.auth.krb5ccname[0] != '\0') {
420
421 char var[PATH_MAX];
422
423 _pam_log_debug(ctrl, LOG_DEBUG, "request returned KRB5CCNAME: %s",
424 response.data.auth.krb5ccname);
425
426 snprintf(var, sizeof(var), "KRB5CCNAME=%s", response.data.auth.krb5ccname);
427
428 ret = pam_putenv(pamh, var);
429 if (ret != PAM_SUCCESS) {
430 _pam_log(LOG_ERR, "failed to set KRB5CCNAME to %s", var);
431 return ret;
432 }
433 }
434
435 if (!process_result) {
436 return ret;
437 }
438
439 if (ret) {
440 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_PASSWORD_EXPIRED");
441 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_PASSWORD_MUST_CHANGE");
442 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_INVALID_WORKSTATION");
443 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_INVALID_LOGON_HOURS");
444 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_ACCOUNT_EXPIRED");
445 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_ACCOUNT_DISABLED");
446 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_ACCOUNT_LOCKED_OUT");
447 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT");
448 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT");
449 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT");
450 }
451
452 /* handle the case where the auth was ok, but the password must expire right now */
453 /* good catch from Ralf Haferkamp: an expiry of "never" is translated to -1 */
454 if ( ! (response.data.auth.info3.acct_flags & ACB_PWNOEXP) &&
455 (response.data.auth.policy.expire > 0) &&
456 (response.data.auth.info3.pass_last_set_time + response.data.auth.policy.expire < time(NULL))) {
457
458 ret = PAM_AUTHTOK_EXPIRED;
459
460 _pam_log_debug(ctrl, LOG_DEBUG,"Password has expired (Password was last set: %d, "
461 "the policy says it should expire here %d (now it's: %d)\n",
462 response.data.auth.info3.pass_last_set_time,
463 response.data.auth.info3.pass_last_set_time + response.data.auth.policy.expire,
464 time(NULL));
465
466 PAM_WB_REMARK_DIRECT_RET(pamh, "NT_STATUS_PASSWORD_EXPIRED");
467
468 }
469
470 /* warn a user if the password is about to expire soon */
471 if ( ! (response.data.auth.info3.acct_flags & ACB_PWNOEXP) &&
472 (response.data.auth.policy.expire) &&
473 (response.data.auth.info3.pass_last_set_time + response.data.auth.policy.expire > time(NULL) ) ) {
474
475 int days = response.data.auth.policy.expire / SECONDS_PER_DAY;
476 if (days <= DAYS_TO_WARN_BEFORE_PWD_EXPIRES) {
477 _make_remark_format(pamh, PAM_TEXT_INFO, "Your password will expire in %d days", days);
478 }
479 }
480
481 if (response.data.auth.info3.user_flgs & LOGON_CACHED_ACCOUNT) {
482 _make_remark(pamh, PAM_ERROR_MSG, "Logging on using cached account. Network ressources can be unavailable");
483 _pam_log_debug(ctrl, LOG_DEBUG,"User %s logged on using cached account\n", user);
484 }
485
486 /* save the CIFS homedir for pam_cifs / pam_mount */
487 if (response.data.auth.info3.home_dir[0] != '\0') {
488
489 int ret2 = pam_set_data(pamh, PAM_WINBIND_HOMEDIR,
490 (void *) strdup(response.data.auth.info3.home_dir),
491 _pam_winbind_cleanup_func);
492 if (ret2) {
493 _pam_log_debug(ctrl, LOG_DEBUG, "Could not set data: %s",
494 pam_strerror(pamh, ret2));
495 }
496
497 }
498
499 /* save the logon script path for other PAM modules */
500 if (response.data.auth.info3.logon_script[0] != '\0') {
501
502 int ret2 = pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT,
503 (void *) strdup(response.data.auth.info3.logon_script),
504 _pam_winbind_cleanup_func);
505 if (ret2) {
506 _pam_log_debug(ctrl, LOG_DEBUG, "Could not set data: %s",
507 pam_strerror(pamh, ret2));
508 }
509 }
510
511 /* save the profile path for other PAM modules */
512 if (response.data.auth.info3.profile_path[0] != '\0') {
513
514 int ret2 = pam_set_data(pamh, PAM_WINBIND_PROFILEPATH,
515 (void *) strdup(response.data.auth.info3.profile_path),
516 _pam_winbind_cleanup_func);
517 if (ret2) {
518 _pam_log_debug(ctrl, LOG_DEBUG, "Could not set data: %s",
519 pam_strerror(pamh, ret2));
520 }
521 }
522
523 return ret;
524 }
525
526 /* talk to winbindd */
527 static int winbind_chauthtok_request(pam_handle_t * pamh,
528 int ctrl,
529 const char *user,
530 const char *oldpass,
531 const char *newpass,
532 time_t pwd_last_set)
533 {
534 struct winbindd_request request;
535 struct winbindd_response response;
536 int ret;
537
538 ZERO_STRUCT(request);
539 ZERO_STRUCT(response);
540
541 if (request.data.chauthtok.user == NULL) return -2;
542
543 strncpy(request.data.chauthtok.user, user,
544 sizeof(request.data.chauthtok.user) - 1);
545
546 if (oldpass != NULL) {
547 strncpy(request.data.chauthtok.oldpass, oldpass,
548 sizeof(request.data.chauthtok.oldpass) - 1);
549 } else {
550 request.data.chauthtok.oldpass[0] = '\0';
551 }
552
553 if (newpass != NULL) {
554 strncpy(request.data.chauthtok.newpass, newpass,
555 sizeof(request.data.chauthtok.newpass) - 1);
556 } else {
557 request.data.chauthtok.newpass[0] = '\0';
558 }
559
560 if (ctrl & WINBIND_KRB5_AUTH) {
561 request.flags = WBFLAG_PAM_KRB5 | WBFLAG_PAM_CONTACT_TRUSTDOM;
562 }
563
564 ret = pam_winbind_request_log(pamh, ctrl, WINBINDD_PAM_CHAUTHTOK, &request, &response, user);
565
566 if (ret == PAM_SUCCESS) {
567 return ret;
568 }
569
570 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_BACKUP_CONTROLLER");
571 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_ACCESS_DENIED");
572
573 /* TODO: tell the min pwd length ? */
574 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_PWD_TOO_SHORT");
575
576 /* TODO: tell the minage ? */
577 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_PWD_TOO_RECENT");
578
579 /* TODO: tell the history length ? */
580 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_PWD_HISTORY_CONFLICT");
581
582 if (!strcasecmp(response.data.auth.nt_status_string, "NT_STATUS_PASSWORD_RESTRICTION")) {
583
584 /* FIXME: avoid to send multiple PAM messages after another */
585 switch (response.data.auth.reject_reason) {
586 case -1:
587 break;
588 case REJECT_REASON_OTHER:
589 if ((response.data.auth.policy.min_passwordage > 0) &&
590 (pwd_last_set + response.data.auth.policy.min_passwordage > time(NULL))) {
591 PAM_WB_REMARK_DIRECT(pamh, "NT_STATUS_PWD_TOO_RECENT");
592 }
593 break;
594 case REJECT_REASON_TOO_SHORT:
595 PAM_WB_REMARK_DIRECT(pamh, "NT_STATUS_PWD_TOO_SHORT");
596 break;
597 case REJECT_REASON_IN_HISTORY:
598 PAM_WB_REMARK_DIRECT(pamh, "NT_STATUS_PWD_HISTORY_CONFLICT");
599 break;
600 case REJECT_REASON_NOT_COMPLEX:
601 _make_remark(pamh, PAM_ERROR_MSG, "Password does not meet complexity requirements");
602 break;
603 default:
604 _pam_log_debug(ctrl, LOG_DEBUG,
605 "unknown password change reject reason: %d",
606 response.data.auth.reject_reason);
607 break;
608 }
609
610 _make_remark_format(pamh, PAM_ERROR_MSG,
611 "Your password must be at least %d characters; "
612 "cannot repeat any of the your previous %d passwords"
613 "%s. "
614 "Please type a different password. "
615 "Type a password which meets these requirements in both text boxes.",
616 response.data.auth.policy.min_length_password,
617 response.data.auth.policy.password_history,
618 (response.data.auth.policy.password_properties & DOMAIN_PASSWORD_COMPLEX) ?
619 "; must contain capitals, numerals or punctuation; and cannot contain your account or full name" :
620 "");
621
622 }
623
624 return ret;
625 }
626
627 /*
628 * Checks if a user has an account
629 *
630 * return values:
631 * 1 = User not found
632 * 0 = OK
633 * -1 = System error
634 */
635 static int valid_user(const char *user, pam_handle_t *pamh, int ctrl)
636 {
637 /* check not only if the user is available over NSS calls, also make
638 * sure it's really a winbind user, this is important when stacking PAM
639 * modules in the 'account' or 'password' facility. */
640
641 struct passwd *pwd = NULL;
642 struct winbindd_request request;
643 struct winbindd_response response;
644 int ret;
645
646 ZERO_STRUCT(request);
647 ZERO_STRUCT(response);
648
649 pwd = getpwnam(user);
650 if (pwd == NULL) {
651 return 1;
652 }
653
654 strncpy(request.data.username, user,
655 sizeof(request.data.username) - 1);
656
657 ret = pam_winbind_request_log(pamh, ctrl, WINBINDD_GETPWNAM, &request, &response, user);
658
659 switch (ret) {
660 case PAM_USER_UNKNOWN:
661 return 1;
662 case PAM_SUCCESS:
663 return 0;
664 default:
665 break;
666 }
667 return -1;
668 }
669
670 static char *_pam_delete(register char *xx)
671 {
672 _pam_overwrite(xx);
673 _pam_drop(xx);
674 return NULL;
675 }
676
677 /*
678 * obtain a password from the user
679 */
680
681 static int _winbind_read_password(pam_handle_t * pamh,
682 unsigned int ctrl,
683 const char *comment,
684 const char *prompt1,
685 const char *prompt2,
686 const char **pass)
687 {
688 int authtok_flag;
689 int retval;
690 const char *item;
691 char *token;
692
693 /*
694 * make sure nothing inappropriate gets returned
695 */
696
697 *pass = token = NULL;
698
699 /*
700 * which authentication token are we getting?
701 */
702
703 authtok_flag = on(WINBIND__OLD_PASSWORD, ctrl) ? PAM_OLDAUTHTOK : PAM_AUTHTOK;
704
705 /*
706 * should we obtain the password from a PAM item ?
707 */
708
709 if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) || on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
710 retval = pam_get_item(pamh, authtok_flag, (const void **) &item);
711 if (retval != PAM_SUCCESS) {
712 /* very strange. */
713 _pam_log(LOG_ALERT,
714 "pam_get_item returned error to unix-read-password"
715 );
716 return retval;
717 } else if (item != NULL) { /* we have a password! */
718 *pass = item;
719 item = NULL;
720 return PAM_SUCCESS;
721 } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
722 return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
723 } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
724 && off(WINBIND__OLD_PASSWORD, ctrl)) {
725 return PAM_AUTHTOK_RECOVER_ERR;
726 }
727 }
728 /*
729 * getting here implies we will have to get the password from the
730 * user directly.
731 */
732
733 {
734 struct pam_message msg[3], *pmsg[3];
735 struct pam_response *resp;
736 int i, replies;
737
738 /* prepare to converse */
739
740 if (comment != NULL) {
741 pmsg[0] = &msg[0];
742 msg[0].msg_style = PAM_TEXT_INFO;
743 msg[0].msg = CONST_DISCARD(char *, comment);
744 i = 1;
745 } else {
746 i = 0;
747 }
748
749 pmsg[i] = &msg[i];
750 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
751 msg[i++].msg = CONST_DISCARD(char *, prompt1);
752 replies = 1;
753
754 if (prompt2 != NULL) {
755 pmsg[i] = &msg[i];
756 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
757 msg[i++].msg = CONST_DISCARD(char *, prompt2);
758 ++replies;
759 }
760 /* so call the conversation expecting i responses */
761 resp = NULL;
762 retval = converse(pamh, i, pmsg, &resp);
763
764 if (resp != NULL) {
765
766 /* interpret the response */
767
768 if (retval == PAM_SUCCESS) { /* a good conversation */
769
770 token = x_strdup(resp[i - replies].resp);
771 if (token != NULL) {
772 if (replies == 2) {
773 /* verify that password entered correctly */
774 if (!resp[i - 1].resp
775 || strcmp(token, resp[i - 1].resp)) {
776 _pam_delete(token); /* mistyped */
777 retval = PAM_AUTHTOK_RECOVER_ERR;
778 _make_remark(pamh, PAM_ERROR_MSG, MISTYPED_PASS);
779 }
780 }
781 } else {
782 _pam_log(LOG_NOTICE, "could not recover authentication token");
783 retval = PAM_AUTHTOK_RECOVER_ERR;
784 }
785
786 }
787 /*
788 * tidy up the conversation (resp_retcode) is ignored
789 * -- what is it for anyway? AGM
790 */
791
792 _pam_drop_reply(resp, i);
793
794 } else {
795 retval = (retval == PAM_SUCCESS)
796 ? PAM_AUTHTOK_RECOVER_ERR : retval;
797 }
798 }
799
800 if (retval != PAM_SUCCESS) {
801 _pam_log_debug(ctrl, LOG_DEBUG,
802 "unable to obtain a password");
803 return retval;
804 }
805 /* 'token' is the entered password */
806
807 /* we store this password as an item */
808
809 retval = pam_set_item(pamh, authtok_flag, token);
810 _pam_delete(token); /* clean it up */
811 if (retval != PAM_SUCCESS ||
812 (retval = pam_get_item(pamh, authtok_flag, (const void **) &item)) != PAM_SUCCESS) {
813
814 _pam_log(LOG_CRIT, "error manipulating password");
815 return retval;
816
817 }
818
819 *pass = item;
820 item = NULL; /* break link to password */
821
822 return PAM_SUCCESS;
823 }
824
825 const char *get_conf_item_string(int argc,
826 const char **argv,
827 int ctrl,
828 dictionary *d,
829 const char *item,
830 int flag)
831 {
832 int i = 0;
833 const char *parm_opt = NULL;
834 char *key = NULL;
835
836 if (!(ctrl & flag)) {
837 goto out;
838 }
839
840 /* let the pam opt take precedence over the pam_winbind.conf option */
841
842 if (d != NULL) {
843
844 if (!asprintf(&key, "global:%s", item)) {
845 goto out;
846 }
847
848 parm_opt = iniparser_getstr(d, key);
849 SAFE_FREE(key);
850 }
851
852 for ( i=0; i<argc; i++ ) {
853
854 if ((strncmp(argv[i], item, strlen(item)) == 0)) {
855 char *p;
856
857 if ( (p = strchr( argv[i], '=' )) == NULL) {
858 _pam_log(LOG_INFO, "no \"=\" delimiter for \"%s\" found\n", item);
859 goto out;
860 }
861 _pam_log_debug(ctrl, LOG_INFO, "PAM config: %s '%s'\n", item, p+1);
862 return p + 1;
863 }
864 }
865
866 if (d != NULL) {
867 _pam_log_debug(ctrl, LOG_INFO, "CONFIG file: %s '%s'\n", item, parm_opt);
868 }
869 out:
870 return parm_opt;
871 }
872
873 const char *get_krb5_cc_type_from_config(int argc, const char **argv, int ctrl, dictionary *d)
874 {
875 return get_conf_item_string(argc, argv, ctrl, d, "krb5_ccache_type", WINBIND_KRB5_CCACHE_TYPE);
876 }
877
878 const char *get_member_from_config(int argc, const char **argv, int ctrl, dictionary *d)
879 {
880 const char *ret = NULL;
881 ret = get_conf_item_string(argc, argv, ctrl, d, "require_membership_of", WINBIND_REQUIRED_MEMBERSHIP);
882 if (ret) {
883 return ret;
884 }
885 return get_conf_item_string(argc, argv, ctrl, d, "require-membership-of", WINBIND_REQUIRED_MEMBERSHIP);
886 }
887
888 PAM_EXTERN
889 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
890 int argc, const char **argv)
891 {
892 const char *username;
893 const char *password;
894 const char *member = NULL;
895 const char *cctype = NULL;
896 int retval = PAM_AUTH_ERR;
897 dictionary *d = NULL;
898
899 /* parse arguments */
900 int ctrl = _pam_parse(argc, argv, &d);
901 if (ctrl == -1) {
902 retval = PAM_SYSTEM_ERR;
903 goto out;
904 }
905
906 _pam_log_debug(ctrl, LOG_DEBUG,"pam_winbind: pam_sm_authenticate (flags: 0x%04x)", flags);
907
908 /* Get the username */
909 retval = pam_get_user(pamh, &username, NULL);
910 if ((retval != PAM_SUCCESS) || (!username)) {
911 _pam_log_debug(ctrl, LOG_DEBUG, "can not get the username");
912 retval = PAM_SERVICE_ERR;
913 goto out;
914 }
915
916 retval = _winbind_read_password(pamh, ctrl, NULL,
917 "Password: ", NULL,
918 &password);
919
920 if (retval != PAM_SUCCESS) {
921 _pam_log(LOG_ERR, "Could not retrieve user's password");
922 retval = PAM_AUTHTOK_ERR;
923 goto out;
924 }
925
926 /* Let's not give too much away in the log file */
927
928 #ifdef DEBUG_PASSWORD
929 _pam_log_debug(ctrl, LOG_INFO, "Verify user `%s' with password `%s'",
930 username, password);
931 #else
932 _pam_log_debug(ctrl, LOG_INFO, "Verify user `%s'", username);
933 #endif
934
935 member = get_member_from_config(argc, argv, ctrl, d);
936
937 cctype = get_krb5_cc_type_from_config(argc, argv, ctrl, d);
938
939 /* Now use the username to look up password */
940 retval = winbind_auth_request(pamh, ctrl, username, password, member, cctype, True, NULL);
941
942 if (retval == PAM_NEW_AUTHTOK_REQD ||
943 retval == PAM_AUTHTOK_EXPIRED) {
944
945 char *buf;
946
947 if (!asprintf(&buf, "%d", retval)) {
948 retval = PAM_BUF_ERR;
949 goto out;
950 }
951
952 pam_set_data( pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, (void *)buf, _pam_winbind_cleanup_func);
953
954 retval = PAM_SUCCESS;
955 goto out;
956 }
957
958 out:
959 if (d) {
960 iniparser_freedict(d);
961 }
962 return retval;
963 }
964
965 PAM_EXTERN
966 int pam_sm_setcred(pam_handle_t *pamh, int flags,
967 int argc, const char **argv)
968 {
969 /* parse arguments */
970 int ctrl = _pam_parse(argc, argv, NULL);
971 if (ctrl == -1) {
972 return PAM_SYSTEM_ERR;
973 }
974
975 _pam_log_debug(ctrl, LOG_DEBUG,"pam_winbind: pam_sm_setcred (flags: 0x%04x)", flags);
976
977 if (flags & PAM_DELETE_CRED) {
978 return pam_sm_close_session(pamh, flags, argc, argv);
979 }
980
981 return PAM_SUCCESS;
982 }
983
984 /*
985 * Account management. We want to verify that the account exists
986 * before returning PAM_SUCCESS
987 */
988 PAM_EXTERN
989 int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
990 int argc, const char **argv)
991 {
992 const char *username;
993 int retval = PAM_USER_UNKNOWN;
994 void *tmp = NULL;
995
996 /* parse arguments */
997 int ctrl = _pam_parse(argc, argv, NULL);
998 if (ctrl == -1) {
999 return PAM_SYSTEM_ERR;
1000 }
1001
1002 _pam_log_debug(ctrl, LOG_DEBUG,"pam_winbind: pam_sm_acct_mgmt (flags: 0x%04x)", flags);
1003
1004
1005 /* Get the username */
1006 retval = pam_get_user(pamh, &username, NULL);
1007 if ((retval != PAM_SUCCESS) || (!username)) {
1008 _pam_log_debug(ctrl, LOG_DEBUG,"can not get the username");
1009 return PAM_SERVICE_ERR;
1010 }
1011
1012 /* Verify the username */
1013 retval = valid_user(username, pamh, ctrl);
1014 switch (retval) {
1015 case -1:
1016 /* some sort of system error. The log was already printed */
1017 return PAM_SERVICE_ERR;
1018 case 1:
1019 /* the user does not exist */
1020 _pam_log_debug(ctrl, LOG_NOTICE, "user `%s' not found", username);
1021 if (ctrl & WINBIND_UNKNOWN_OK_ARG) {
1022 return PAM_IGNORE;
1023 }
1024 return PAM_USER_UNKNOWN;
1025 case 0:
1026 pam_get_data( pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, (const void **)&tmp);
1027 if (tmp != NULL) {
1028 retval = atoi(tmp);
1029 switch (retval) {
1030 case PAM_AUTHTOK_EXPIRED:
1031 /* fall through, since new token is required in this case */
1032 case PAM_NEW_AUTHTOK_REQD:
1033 _pam_log(LOG_WARNING, "pam_sm_acct_mgmt success but %s is set",
1034 PAM_WINBIND_NEW_AUTHTOK_REQD);
1035 _pam_log(LOG_NOTICE, "user '%s' needs new password", username);
1036 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
1037 return PAM_NEW_AUTHTOK_REQD;
1038 default:
1039 _pam_log(LOG_WARNING, "pam_sm_acct_mgmt success");
1040 _pam_log(LOG_NOTICE, "user '%s' granted access", username);
1041 return PAM_SUCCESS;
1042 }
1043 }
1044
1045 /* Otherwise, the authentication looked good */
1046 _pam_log(LOG_NOTICE, "user '%s' granted access", username);
1047 return PAM_SUCCESS;
1048 default:
1049 /* we don't know anything about this return value */
1050 _pam_log(LOG_ERR, "internal module error (retval = %d, user = `%s')",
1051 retval, username);
1052 return PAM_SERVICE_ERR;
1053 }
1054
1055 /* should not be reached */
1056 return PAM_IGNORE;
1057 }
1058
1059 PAM_EXTERN
1060 int pam_sm_open_session(pam_handle_t *pamh, int flags,
1061 int argc, const char **argv)
1062 {
1063 /* parse arguments */
1064 int ctrl = _pam_parse(argc, argv, NULL);
1065 if (ctrl == -1) {
1066 return PAM_SYSTEM_ERR;
1067 }
1068
1069 _pam_log_debug(ctrl, LOG_DEBUG,"pam_winbind: pam_sm_open_session handler (flags: 0x%04x)", flags);
1070
1071 return PAM_SUCCESS;
1072 }
1073
1074 PAM_EXTERN
1075 int pam_sm_close_session(pam_handle_t *pamh, int flags,
1076 int argc, const char **argv)
1077 {
1078 dictionary *d = NULL;
1079 int retval = PAM_SUCCESS;
1080
1081 /* parse arguments */
1082 int ctrl = _pam_parse(argc, argv, &d);
1083 if (ctrl == -1) {
1084 retval = PAM_SYSTEM_ERR;
1085 goto out;
1086 }
1087
1088 _pam_log_debug(ctrl, LOG_DEBUG,"pam_winbind: pam_sm_close_session handler (flags: 0x%04x)", flags);
1089
1090 if (!(flags & PAM_DELETE_CRED)) {
1091 retval = PAM_SUCCESS;
1092 goto out;
1093 }
1094
1095 if (ctrl & WINBIND_KRB5_AUTH) {
1096
1097 /* destroy the ccache here */
1098 struct winbindd_request request;
1099 struct winbindd_response response;
1100 const char *user;
1101 const char *ccname = NULL;
1102 struct passwd *pwd = NULL;
1103
1104 ZERO_STRUCT(request);
1105 ZERO_STRUCT(response);
1106
1107 retval = pam_get_user(pamh, &user, "Username: ");
1108 if (retval == PAM_SUCCESS) {
1109 if (user == NULL) {
1110 _pam_log(LOG_ERR, "username was NULL!");
1111 retval = PAM_USER_UNKNOWN;
1112 goto out;
1113 }
1114 if (retval == PAM_SUCCESS) {
1115 _pam_log_debug(ctrl, LOG_DEBUG, "username [%s] obtained", user);
1116 }
1117 } else {
1118 _pam_log_debug(ctrl, LOG_DEBUG, "could not identify user");
1119 goto out;
1120 }
1121
1122 ccname = pam_getenv(pamh, "KRB5CCNAME");
1123 if (ccname == NULL) {
1124 _pam_log_debug(ctrl, LOG_DEBUG, "user has no KRB5CCNAME environment");
1125 retval = PAM_SUCCESS;
1126 goto out;
1127 }
1128
1129 strncpy(request.data.logoff.user, user,
1130 sizeof(request.data.logoff.user) - 1);
1131
1132 strncpy(request.data.logoff.krb5ccname, ccname,
1133 sizeof(request.data.logoff.krb5ccname) - 1);
1134
1135 pwd = getpwnam(user);
1136 if (pwd == NULL) {
1137 retval = PAM_USER_UNKNOWN;
1138 goto out;
1139 }
1140 request.data.logoff.uid = pwd->pw_uid;
1141
1142 request.flags = WBFLAG_PAM_KRB5 | WBFLAG_PAM_CONTACT_TRUSTDOM;
1143
1144 retval = pam_winbind_request_log(pamh, ctrl, WINBINDD_PAM_LOGOFF, &request, &response, user);
1145 }
1146
1147 out:
1148 if (d) {
1149 iniparser_freedict(d);
1150 }
1151 return retval;
1152 }
1153
1154
1155
1156 PAM_EXTERN
1157 int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
1158 int argc, const char **argv)
1159 {
1160 unsigned int lctrl;
1161 int retval;
1162 unsigned int ctrl;
1163
1164 /* <DO NOT free() THESE> */
1165 const char *user;
1166 char *pass_old, *pass_new;
1167 /* </DO NOT free() THESE> */
1168
1169 char *Announce;
1170
1171 int retry = 0;
1172 dictionary *d = NULL;
1173
1174 ctrl = _pam_parse(argc, argv, &d);
1175 if (ctrl == -1) {
1176 retval = PAM_SYSTEM_ERR;
1177 goto out;
1178 }
1179
1180 _pam_log_debug(ctrl, LOG_DEBUG,"pam_winbind: pam_sm_chauthtok (flags: 0x%04x)", flags);
1181
1182 /* clearing offline bit for the auth in the password change */
1183 ctrl &= ~WINBIND_CACHED_LOGIN;
1184
1185 /*
1186 * First get the name of a user
1187 */
1188 retval = pam_get_user(pamh, &user, "Username: ");
1189 if (retval == PAM_SUCCESS) {
1190 if (user == NULL) {
1191 _pam_log(LOG_ERR, "username was NULL!");
1192 retval = PAM_USER_UNKNOWN;
1193 goto out;
1194 }
1195 if (retval == PAM_SUCCESS) {
1196 _pam_log_debug(ctrl, LOG_DEBUG, "username [%s] obtained",
1197 user);
1198 }
1199 } else {
1200 _pam_log_debug(ctrl, LOG_DEBUG,
1201 "password - could not identify user");
1202 goto out;
1203 }
1204
1205 /* check if this is really a user in winbindd, not only in NSS */
1206 retval = valid_user(user, pamh, ctrl);
1207 switch (retval) {
1208 case 1:
1209 retval = PAM_USER_UNKNOWN;
1210 goto out;
1211 case -1:
1212 retval = PAM_SYSTEM_ERR;
1213 goto out;
1214 default:
1215 break;
1216 }
1217
1218 /*
1219 * obtain and verify the current password (OLDAUTHTOK) for
1220 * the user.
1221 */
1222
1223 if (flags & PAM_PRELIM_CHECK) {
1224
1225 time_t pwdlastset_prelim = 0;
1226
1227 /* instruct user what is happening */
1228 #define greeting "Changing password for "
1229 Announce = (char *) malloc(sizeof(greeting) + strlen(user));
1230 if (Announce == NULL) {
1231 _pam_log(LOG_CRIT, "password - out of memory");
1232 retval = PAM_BUF_ERR;
1233 goto out;
1234 }
1235 (void) strcpy(Announce, greeting);
1236 (void) strcpy(Announce + sizeof(greeting) - 1, user);
1237 #undef greeting
1238
1239 lctrl = ctrl | WINBIND__OLD_PASSWORD;
1240 retval = _winbind_read_password(pamh, lctrl,
1241 Announce,
1242 "(current) NT password: ",
1243 NULL,
1244 (const char **) &pass_old);
1245 if (retval != PAM_SUCCESS) {
1246 _pam_log(LOG_NOTICE, "password - (old) token not obtained");
1247 goto out;
1248 }
1249 /* verify that this is the password for this user */
1250
1251 retval = winbind_auth_request(pamh, ctrl, user, pass_old, NULL, NULL, False, &pwdlastset_prelim);
1252
1253 if (retval != PAM_ACCT_EXPIRED &&
1254 retval != PAM_AUTHTOK_EXPIRED &&
1255 retval != PAM_NEW_AUTHTOK_REQD &&
1256 retval != PAM_SUCCESS) {
1257 pass_old = NULL;
1258 goto out;
1259 }
1260
1261 pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET, (void *)pwdlastset_prelim, NULL);
1262
1263 retval = pam_set_item(pamh, PAM_OLDAUTHTOK, (const void *) pass_old);
1264 pass_old = NULL;
1265 if (retval != PAM_SUCCESS) {
1266 _pam_log(LOG_CRIT, "failed to set PAM_OLDAUTHTOK");
1267 }
1268 } else if (flags & PAM_UPDATE_AUTHTOK) {
1269
1270 time_t pwdlastset_update = 0;
1271
1272 /*
1273 * obtain the proposed password
1274 */
1275
1276 /*
1277 * get the old token back.
1278 */
1279
1280 retval = pam_get_item(pamh, PAM_OLDAUTHTOK,
1281 (const void **) &pass_old);
1282
1283 if (retval != PAM_SUCCESS) {
1284 _pam_log(LOG_NOTICE, "user not authenticated");
1285 goto out;
1286 }
1287
1288 lctrl = ctrl;
1289
1290 if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
1291 lctrl |= WINBIND_USE_FIRST_PASS_ARG;
1292 }
1293 retry = 0;
1294 retval = PAM_AUTHTOK_ERR;
1295 while ((retval != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
1296 /*
1297 * use_authtok is to force the use of a previously entered
1298 * password -- needed for pluggable password strength checking
1299 */
1300
1301 retval = _winbind_read_password(pamh, lctrl,
1302 NULL,
1303 "Enter new NT password: ",
1304 "Retype new NT password: ",
1305 (const char **) &pass_new);
1306
1307 if (retval != PAM_SUCCESS) {
1308 _pam_log_debug(ctrl, LOG_ALERT
1309 ,"password - new password not obtained");
1310 pass_old = NULL;/* tidy up */
1311 goto out;
1312 }
1313
1314 /*
1315 * At this point we know who the user is and what they
1316 * propose as their new password. Verify that the new
1317 * password is acceptable.
1318 */
1319
1320 if (pass_new[0] == '\0') {/* "\0" password = NULL */
1321 pass_new = NULL;
1322 }
1323 }
1324
1325 /*
1326 * By reaching here we have approved the passwords and must now
1327 * rebuild the password database file.
1328 */
1329 pam_get_data( pamh, PAM_WINBIND_PWD_LAST_SET, (const void **)&pwdlastset_update);
1330
1331 retval = winbind_chauthtok_request(pamh, ctrl, user, pass_old, pass_new, pwdlastset_update);
1332 if (retval) {
1333 _pam_overwrite(pass_new);
1334 _pam_overwrite(pass_old);
1335 pass_old = pass_new = NULL;
1336 goto out;
1337 }
1338
1339 /* just in case we need krb5 creds after a password change over msrpc */
1340
1341 if (ctrl & WINBIND_KRB5_AUTH) {
1342
1343 const char *member = get_member_from_config(argc, argv, ctrl, d);
1344 const char *cctype = get_krb5_cc_type_from_config(argc, argv, ctrl, d);
1345
1346 retval = winbind_auth_request(pamh, ctrl, user, pass_new, member, cctype, False, NULL);
1347 _pam_overwrite(pass_new);
1348 _pam_overwrite(pass_old);
1349 pass_old = pass_new = NULL;
1350 }
1351 } else {
1352 retval = PAM_SERVICE_ERR;
1353 }
1354
1355 out:
1356 if (d) {
1357 iniparser_freedict(d);
1358 }
1359 return retval;
1360 }
1361
1362 #ifdef PAM_STATIC
1363
1364 /* static module data */
1365
1366 struct pam_module _pam_winbind_modstruct = {
1367 MODULE_NAME,
1368 pam_sm_authenticate,
1369 pam_sm_setcred,
1370 pam_sm_acct_mgmt,
1371 pam_sm_open_session,
1372 pam_sm_close_session,
1373 pam_sm_chauthtok
1374 };
1375
1376 #endif
1377
1378 /*
1379 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
1380 * Copyright (c) Tim Potter <tpot@samba.org> 2000
1381 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
1382 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2006
1383 * Copyright (c) Jan Rêkorajski 1999.
1384 * Copyright (c) Andrew G. Morgan 1996-8.
1385 * Copyright (c) Alex O. Yuriev, 1996.
1386 * Copyright (c) Cristian Gafton 1996.
1387 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
1388 *
1389 * Redistribution and use in source and binary forms, with or without
1390 * modification, are permitted provided that the following conditions
1391 * are met:
1392 * 1. Redistributions of source code must retain the above copyright
1393 * notice, and the entire permission notice in its entirety,
1394 * including the disclaimer of warranties.
1395 * 2. Redistributions in binary form must reproduce the above copyright
1396 * notice, this list of conditions and the following disclaimer in the
1397 * documentation and/or other materials provided with the distribution.
1398 * 3. The name of the author may not be used to endorse or promote
1399 * products derived from this software without specific prior
1400 * written permission.
1401 *
1402 * ALTERNATIVELY, this product may be distributed under the terms of
1403 * the GNU Public License, in which case the provisions of the GPL are
1404 * required INSTEAD OF the above restrictions. (This clause is
1405 * necessary due to a potential bad interaction between the GPL and
1406 * the restrictions contained in a BSD-style copyright.)
1407 *
1408 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
1409 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
1410 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
1411 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
1412 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
1413 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
1414 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1415 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
1416 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1417 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
1418 * OF THE POSSIBILITY OF SUCH DAMAGE.
1419 */
WIP