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pam_winbind: add _pam_check_remark_auth_err().
[Samba/nascimento.git] / source3 / nsswitch / pam_winbind.c
blob41dacd7105849cd15e5f03cc0b6de8377e921aa2
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> 2005-2008
7
8 largely based on pam_userdb by Cristian Gafton <gafton@redhat.com> also
9 contains large slabs of code from pam_unix by Elliot Lee
10 <sopwith@redhat.com> (see copyright below for full details)
11 */
12
13 #include "pam_winbind.h"
14
15 static int wbc_error_to_pam_error(wbcErr status)
16 {
17 switch (status) {
18 case WBC_ERR_SUCCESS:
19 return PAM_SUCCESS;
20 case WBC_ERR_NOT_IMPLEMENTED:
21 return PAM_SERVICE_ERR;
22 case WBC_ERR_UNKNOWN_FAILURE:
23 break;
24 case WBC_ERR_NO_MEMORY:
25 return PAM_BUF_ERR;
26 case WBC_ERR_INVALID_SID:
27 case WBC_ERR_INVALID_PARAM:
28 break;
29 case WBC_ERR_WINBIND_NOT_AVAILABLE:
30 return PAM_AUTHINFO_UNAVAIL;
31 case WBC_ERR_DOMAIN_NOT_FOUND:
32 return PAM_AUTHINFO_UNAVAIL;
33 case WBC_ERR_INVALID_RESPONSE:
34 return PAM_BUF_ERR;
35 case WBC_ERR_NSS_ERROR:
36 return PAM_USER_UNKNOWN;
37 case WBC_ERR_AUTH_ERROR:
38 return PAM_AUTH_ERR;
39 case WBC_ERR_UNKNOWN_USER:
40 return PAM_USER_UNKNOWN;
41 case WBC_ERR_UNKNOWN_GROUP:
42 return PAM_USER_UNKNOWN;
43 case WBC_ERR_PWD_CHANGE_FAILED:
44 break;
45 }
46
47 /* be paranoid */
48 return PAM_AUTH_ERR;
49 }
50
51 static const char *_pam_error_code_str(int err)
52 {
53 switch (err) {
54 case PAM_SUCCESS:
55 return "PAM_SUCCESS";
56 case PAM_OPEN_ERR:
57 return "PAM_OPEN_ERR";
58 case PAM_SYMBOL_ERR:
59 return "PAM_SYMBOL_ERR";
60 case PAM_SERVICE_ERR:
61 return "PAM_SERVICE_ERR";
62 case PAM_SYSTEM_ERR:
63 return "PAM_SYSTEM_ERR";
64 case PAM_BUF_ERR:
65 return "PAM_BUF_ERR";
66 case PAM_PERM_DENIED:
67 return "PAM_PERM_DENIED";
68 case PAM_AUTH_ERR:
69 return "PAM_AUTH_ERR";
70 case PAM_CRED_INSUFFICIENT:
71 return "PAM_CRED_INSUFFICIENT";
72 case PAM_AUTHINFO_UNAVAIL:
73 return "PAM_AUTHINFO_UNAVAIL";
74 case PAM_USER_UNKNOWN:
75 return "PAM_USER_UNKNOWN";
76 case PAM_MAXTRIES:
77 return "PAM_MAXTRIES";
78 case PAM_NEW_AUTHTOK_REQD:
79 return "PAM_NEW_AUTHTOK_REQD";
80 case PAM_ACCT_EXPIRED:
81 return "PAM_ACCT_EXPIRED";
82 case PAM_SESSION_ERR:
83 return "PAM_SESSION_ERR";
84 case PAM_CRED_UNAVAIL:
85 return "PAM_CRED_UNAVAIL";
86 case PAM_CRED_EXPIRED:
87 return "PAM_CRED_EXPIRED";
88 case PAM_CRED_ERR:
89 return "PAM_CRED_ERR";
90 case PAM_NO_MODULE_DATA:
91 return "PAM_NO_MODULE_DATA";
92 case PAM_CONV_ERR:
93 return "PAM_CONV_ERR";
94 case PAM_AUTHTOK_ERR:
95 return "PAM_AUTHTOK_ERR";
96 case PAM_AUTHTOK_RECOVERY_ERR:
97 return "PAM_AUTHTOK_RECOVERY_ERR";
98 case PAM_AUTHTOK_LOCK_BUSY:
99 return "PAM_AUTHTOK_LOCK_BUSY";
100 case PAM_AUTHTOK_DISABLE_AGING:
101 return "PAM_AUTHTOK_DISABLE_AGING";
102 case PAM_TRY_AGAIN:
103 return "PAM_TRY_AGAIN";
104 case PAM_IGNORE:
105 return "PAM_IGNORE";
106 case PAM_ABORT:
107 return "PAM_ABORT";
108 case PAM_AUTHTOK_EXPIRED:
109 return "PAM_AUTHTOK_EXPIRED";
110 #ifdef PAM_MODULE_UNKNOWN
111 case PAM_MODULE_UNKNOWN:
112 return "PAM_MODULE_UNKNOWN";
113 #endif
114 #ifdef PAM_BAD_ITEM
115 case PAM_BAD_ITEM:
116 return "PAM_BAD_ITEM";
117 #endif
118 #ifdef PAM_CONV_AGAIN
119 case PAM_CONV_AGAIN:
120 return "PAM_CONV_AGAIN";
121 #endif
122 #ifdef PAM_INCOMPLETE
123 case PAM_INCOMPLETE:
124 return "PAM_INCOMPLETE";
125 #endif
126 default:
127 return NULL;
128 }
129 }
130
131 #define _PAM_LOG_FUNCTION_ENTER(function, ctx) \
132 do { \
133 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] ENTER: " \
134 function " (flags: 0x%04x)", ctx->pamh, ctx->flags); \
135 _pam_log_state(ctx); \
136 } while (0)
137
138 #define _PAM_LOG_FUNCTION_LEAVE(function, ctx, retval) \
139 do { \
140 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] LEAVE: " \
141 function " returning %d (%s)", ctx->pamh, retval, \
142 _pam_error_code_str(retval)); \
143 _pam_log_state(ctx); \
144 } while (0)
145
146 /* data tokens */
147
148 #define MAX_PASSWD_TRIES 3
149
150 /*
151 * Work around the pam API that has functions with void ** as parameters
152 * These lead to strict aliasing warnings with gcc.
153 */
154 static int _pam_get_item(const pam_handle_t *pamh,
155 int item_type,
156 const void *_item)
157 {
158 const void **item = (const void **)_item;
159 return pam_get_item(pamh, item_type, item);
160 }
161 static int _pam_get_data(const pam_handle_t *pamh,
162 const char *module_data_name,
163 const void *_data)
164 {
165 const void **data = (const void **)_data;
166 return pam_get_data(pamh, module_data_name, data);
167 }
168
169 /* some syslogging */
170
171 #ifdef HAVE_PAM_VSYSLOG
172 static void _pam_log_int(const pam_handle_t *pamh,
173 int err,
174 const char *format,
175 va_list args)
176 {
177 pam_vsyslog(pamh, err, format, args);
178 }
179 #else
180 static void _pam_log_int(const pam_handle_t *pamh,
181 int err,
182 const char *format,
183 va_list args)
184 {
185 char *format2 = NULL;
186 const char *service;
187
188 _pam_get_item(pamh, PAM_SERVICE, &service);
189
190 format2 = (char *)malloc(strlen(MODULE_NAME)+strlen(format)+strlen(service)+5);
191 if (format2 == NULL) {
192 /* what else todo ? */
193 vsyslog(err, format, args);
194 return;
195 }
196
197 sprintf(format2, "%s(%s): %s", MODULE_NAME, service, format);
198 vsyslog(err, format2, args);
199 SAFE_FREE(format2);
200 }
201 #endif /* HAVE_PAM_VSYSLOG */
202
203 static bool _pam_log_is_silent(int ctrl)
204 {
205 return on(ctrl, WINBIND_SILENT);
206 }
207
208 static void _pam_log(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
209 static void _pam_log(struct pwb_context *r, int err, const char *format, ...)
210 {
211 va_list args;
212
213 if (_pam_log_is_silent(r->ctrl)) {
214 return;
215 }
216
217 va_start(args, format);
218 _pam_log_int(r->pamh, err, format, args);
219 va_end(args);
220 }
221 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
222 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
223 {
224 va_list args;
225
226 if (_pam_log_is_silent(ctrl)) {
227 return;
228 }
229
230 va_start(args, format);
231 _pam_log_int(pamh, err, format, args);
232 va_end(args);
233 }
234
235 static bool _pam_log_is_debug_enabled(int ctrl)
236 {
237 if (ctrl == -1) {
238 return false;
239 }
240
241 if (_pam_log_is_silent(ctrl)) {
242 return false;
243 }
244
245 if (!(ctrl & WINBIND_DEBUG_ARG)) {
246 return false;
247 }
248
249 return true;
250 }
251
252 static bool _pam_log_is_debug_state_enabled(int ctrl)
253 {
254 if (!(ctrl & WINBIND_DEBUG_STATE)) {
255 return false;
256 }
257
258 return _pam_log_is_debug_enabled(ctrl);
259 }
260
261 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
262 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...)
263 {
264 va_list args;
265
266 if (!_pam_log_is_debug_enabled(r->ctrl)) {
267 return;
268 }
269
270 va_start(args, format);
271 _pam_log_int(r->pamh, err, format, args);
272 va_end(args);
273 }
274 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
275 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
276 {
277 va_list args;
278
279 if (!_pam_log_is_debug_enabled(ctrl)) {
280 return;
281 }
282
283 va_start(args, format);
284 _pam_log_int(pamh, err, format, args);
285 va_end(args);
286 }
287
288 static void _pam_log_state_datum(struct pwb_context *ctx,
289 int item_type,
290 const char *key,
291 int is_string)
292 {
293 const void *data = NULL;
294 if (item_type != 0) {
295 pam_get_item(ctx->pamh, item_type, &data);
296 } else {
297 pam_get_data(ctx->pamh, key, &data);
298 }
299 if (data != NULL) {
300 const char *type = (item_type != 0) ? "ITEM" : "DATA";
301 if (is_string != 0) {
302 _pam_log_debug(ctx, LOG_DEBUG,
303 "[pamh: %p] STATE: %s(%s) = \"%s\" (%p)",
304 ctx->pamh, type, key, (const char *)data,
305 data);
306 } else {
307 _pam_log_debug(ctx, LOG_DEBUG,
308 "[pamh: %p] STATE: %s(%s) = %p",
309 ctx->pamh, type, key, data);
310 }
311 }
312 }
313
314 #define _PAM_LOG_STATE_DATA_POINTER(ctx, module_data_name) \
315 _pam_log_state_datum(ctx, 0, module_data_name, 0)
316
317 #define _PAM_LOG_STATE_DATA_STRING(ctx, module_data_name) \
318 _pam_log_state_datum(ctx, 0, module_data_name, 1)
319
320 #define _PAM_LOG_STATE_ITEM_POINTER(ctx, item_type) \
321 _pam_log_state_datum(ctx, item_type, #item_type, 0)
322
323 #define _PAM_LOG_STATE_ITEM_STRING(ctx, item_type) \
324 _pam_log_state_datum(ctx, item_type, #item_type, 1)
325
326 #ifdef DEBUG_PASSWORD
327 #define _LOG_PASSWORD_AS_STRING 1
328 #else
329 #define _LOG_PASSWORD_AS_STRING 0
330 #endif
331
332 #define _PAM_LOG_STATE_ITEM_PASSWORD(ctx, item_type) \
333 _pam_log_state_datum(ctx, item_type, #item_type, \
334 _LOG_PASSWORD_AS_STRING)
335
336 static void _pam_log_state(struct pwb_context *ctx)
337 {
338 if (!_pam_log_is_debug_state_enabled(ctx->ctrl)) {
339 return;
340 }
341
342 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_SERVICE);
343 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER);
344 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_TTY);
345 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RHOST);
346 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RUSER);
347 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_OLDAUTHTOK);
348 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_AUTHTOK);
349 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER_PROMPT);
350 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_CONV);
351 #ifdef PAM_FAIL_DELAY
352 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_FAIL_DELAY);
353 #endif
354 #ifdef PAM_REPOSITORY
355 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_REPOSITORY);
356 #endif
357
358 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_HOMEDIR);
359 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSCRIPT);
360 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSERVER);
361 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_PROFILEPATH);
362 _PAM_LOG_STATE_DATA_STRING(ctx,
363 PAM_WINBIND_NEW_AUTHTOK_REQD);
364 /* Use atoi to get PAM result code */
365 _PAM_LOG_STATE_DATA_STRING(ctx,
366 PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
367 _PAM_LOG_STATE_DATA_POINTER(ctx, PAM_WINBIND_PWD_LAST_SET);
368 }
369
370 static int _pam_parse(const pam_handle_t *pamh,
371 int flags,
372 int argc,
373 const char **argv,
374 dictionary **result_d)
375 {
376 int ctrl = 0;
377 const char *config_file = NULL;
378 int i;
379 const char **v;
380 dictionary *d = NULL;
381
382 if (flags & PAM_SILENT) {
383 ctrl |= WINBIND_SILENT;
384 }
385
386 for (i=argc,v=argv; i-- > 0; ++v) {
387 if (!strncasecmp(*v, "config", strlen("config"))) {
388 ctrl |= WINBIND_CONFIG_FILE;
389 config_file = v[i];
390 break;
391 }
392 }
393
394 if (config_file == NULL) {
395 config_file = PAM_WINBIND_CONFIG_FILE;
396 }
397
398 d = iniparser_load(config_file);
399 if (d == NULL) {
400 goto config_from_pam;
401 }
402
403 if (iniparser_getboolean(d, "global:debug", false)) {
404 ctrl |= WINBIND_DEBUG_ARG;
405 }
406
407 if (iniparser_getboolean(d, "global:debug_state", false)) {
408 ctrl |= WINBIND_DEBUG_STATE;
409 }
410
411 if (iniparser_getboolean(d, "global:cached_login", false)) {
412 ctrl |= WINBIND_CACHED_LOGIN;
413 }
414
415 if (iniparser_getboolean(d, "global:krb5_auth", false)) {
416 ctrl |= WINBIND_KRB5_AUTH;
417 }
418
419 if (iniparser_getboolean(d, "global:silent", false)) {
420 ctrl |= WINBIND_SILENT;
421 }
422
423 if (iniparser_getstr(d, "global:krb5_ccache_type") != NULL) {
424 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
425 }
426
427 if ((iniparser_getstr(d, "global:require-membership-of") != NULL) ||
428 (iniparser_getstr(d, "global:require_membership_of") != NULL)) {
429 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
430 }
431
432 if (iniparser_getboolean(d, "global:try_first_pass", false)) {
433 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
434 }
435
436 if (iniparser_getint(d, "global:warn_pwd_expire", 0)) {
437 ctrl |= WINBIND_WARN_PWD_EXPIRE;
438 }
439
440 config_from_pam:
441 /* step through arguments */
442 for (i=argc,v=argv; i-- > 0; ++v) {
443
444 /* generic options */
445 if (!strcmp(*v,"debug"))
446 ctrl |= WINBIND_DEBUG_ARG;
447 else if (!strcasecmp(*v, "debug_state"))
448 ctrl |= WINBIND_DEBUG_STATE;
449 else if (!strcasecmp(*v, "silent"))
450 ctrl |= WINBIND_SILENT;
451 else if (!strcasecmp(*v, "use_authtok"))
452 ctrl |= WINBIND_USE_AUTHTOK_ARG;
453 else if (!strcasecmp(*v, "use_first_pass"))
454 ctrl |= WINBIND_USE_FIRST_PASS_ARG;
455 else if (!strcasecmp(*v, "try_first_pass"))
456 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
457 else if (!strcasecmp(*v, "unknown_ok"))
458 ctrl |= WINBIND_UNKNOWN_OK_ARG;
459 else if (!strncasecmp(*v, "require_membership_of",
460 strlen("require_membership_of")))
461 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
462 else if (!strncasecmp(*v, "require-membership-of",
463 strlen("require-membership-of")))
464 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
465 else if (!strcasecmp(*v, "krb5_auth"))
466 ctrl |= WINBIND_KRB5_AUTH;
467 else if (!strncasecmp(*v, "krb5_ccache_type",
468 strlen("krb5_ccache_type")))
469 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
470 else if (!strcasecmp(*v, "cached_login"))
471 ctrl |= WINBIND_CACHED_LOGIN;
472 else {
473 __pam_log(pamh, ctrl, LOG_ERR,
474 "pam_parse: unknown option: %s", *v);
475 return -1;
476 }
477
478 }
479
480 if (result_d) {
481 *result_d = d;
482 } else {
483 if (d) {
484 iniparser_freedict(d);
485 }
486 }
487
488 return ctrl;
489 };
490
491 static int _pam_winbind_free_context(struct pwb_context *ctx)
492 {
493 if (!ctx) {
494 return 0;
495 }
496
497 if (ctx->dict) {
498 iniparser_freedict(ctx->dict);
499 }
500
501 return 0;
502 }
503
504 static int _pam_winbind_init_context(pam_handle_t *pamh,
505 int flags,
506 int argc,
507 const char **argv,
508 struct pwb_context **ctx_p)
509 {
510 struct pwb_context *r = NULL;
511
512 r = TALLOC_ZERO_P(NULL, struct pwb_context);
513 if (!r) {
514 return PAM_BUF_ERR;
515 }
516
517 talloc_set_destructor(r, _pam_winbind_free_context);
518
519 r->pamh = pamh;
520 r->flags = flags;
521 r->argc = argc;
522 r->argv = argv;
523 r->ctrl = _pam_parse(pamh, flags, argc, argv, &r->dict);
524 if (r->ctrl == -1) {
525 TALLOC_FREE(r);
526 return PAM_SYSTEM_ERR;
527 }
528
529 *ctx_p = r;
530
531 return PAM_SUCCESS;
532 }
533
534 static void _pam_winbind_cleanup_func(pam_handle_t *pamh,
535 void *data,
536 int error_status)
537 {
538 int ctrl = _pam_parse(pamh, 0, 0, NULL, NULL);
539 if (_pam_log_is_debug_state_enabled(ctrl)) {
540 __pam_log_debug(pamh, ctrl, LOG_DEBUG,
541 "[pamh: %p] CLEAN: cleaning up PAM data %p "
542 "(error_status = %d)", pamh, data,
543 error_status);
544 }
545 TALLOC_FREE(data);
546 }
547
548
549 static const struct ntstatus_errors {
550 const char *ntstatus_string;
551 const char *error_string;
552 } ntstatus_errors[] = {
553 {"NT_STATUS_OK",
554 "Success"},
555 {"NT_STATUS_BACKUP_CONTROLLER",
556 "No primary Domain Controler available"},
557 {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
558 "No domain controllers found"},
559 {"NT_STATUS_NO_LOGON_SERVERS",
560 "No logon servers"},
561 {"NT_STATUS_PWD_TOO_SHORT",
562 "Password too short"},
563 {"NT_STATUS_PWD_TOO_RECENT",
564 "The password of this user is too recent to change"},
565 {"NT_STATUS_PWD_HISTORY_CONFLICT",
566 "Password is already in password history"},
567 {"NT_STATUS_PASSWORD_EXPIRED",
568 "Your password has expired"},
569 {"NT_STATUS_PASSWORD_MUST_CHANGE",
570 "You need to change your password now"},
571 {"NT_STATUS_INVALID_WORKSTATION",
572 "You are not allowed to logon from this workstation"},
573 {"NT_STATUS_INVALID_LOGON_HOURS",
574 "You are not allowed to logon at this time"},
575 {"NT_STATUS_ACCOUNT_EXPIRED",
576 "Your account has expired. "
577 "Please contact your System administrator"}, /* SCNR */
578 {"NT_STATUS_ACCOUNT_DISABLED",
579 "Your account is disabled. "
580 "Please contact your System administrator"}, /* SCNR */
581 {"NT_STATUS_ACCOUNT_LOCKED_OUT",
582 "Your account has been locked. "
583 "Please contact your System administrator"}, /* SCNR */
584 {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
585 "Invalid Trust Account"},
586 {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
587 "Invalid Trust Account"},
588 {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
589 "Invalid Trust Account"},
590 {"NT_STATUS_ACCESS_DENIED",
591 "Access is denied"},
592 {NULL, NULL}
593 };
594
595 static const char *_get_ntstatus_error_string(const char *nt_status_string)
596 {
597 int i;
598 for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
599 if (!strcasecmp(ntstatus_errors[i].ntstatus_string,
600 nt_status_string)) {
601 return ntstatus_errors[i].error_string;
602 }
603 }
604 return NULL;
605 }
606
607 /* --- authentication management functions --- */
608
609 /* Attempt a conversation */
610
611 static int converse(const pam_handle_t *pamh,
612 int nargs,
613 struct pam_message **message,
614 struct pam_response **response)
615 {
616 int retval;
617 struct pam_conv *conv;
618
619 retval = _pam_get_item(pamh, PAM_CONV, &conv);
620 if (retval == PAM_SUCCESS) {
621 retval = conv->conv(nargs,
622 (const struct pam_message **)message,
623 response, conv->appdata_ptr);
624 }
625
626 return retval; /* propagate error status */
627 }
628
629
630 static int _make_remark(struct pwb_context *ctx,
631 int type,
632 const char *text)
633 {
634 int retval = PAM_SUCCESS;
635
636 struct pam_message *pmsg[1], msg[1];
637 struct pam_response *resp;
638
639 if (ctx->flags & WINBIND_SILENT) {
640 return PAM_SUCCESS;
641 }
642
643 pmsg[0] = &msg[0];
644 msg[0].msg = discard_const_p(char, text);
645 msg[0].msg_style = type;
646
647 resp = NULL;
648 retval = converse(ctx->pamh, 1, pmsg, &resp);
649
650 if (resp) {
651 _pam_drop_reply(resp, 1);
652 }
653 return retval;
654 }
655
656 static int _make_remark_v(struct pwb_context *ctx,
657 int type,
658 const char *format,
659 va_list args)
660 {
661 char *var;
662 int ret;
663
664 ret = vasprintf(&var, format, args);
665 if (ret < 0) {
666 _pam_log(ctx, LOG_ERR, "memory allocation failure");
667 return ret;
668 }
669
670 ret = _make_remark(ctx, type, var);
671 SAFE_FREE(var);
672 return ret;
673 }
674
675 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
676 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...)
677 {
678 int ret;
679 va_list args;
680
681 va_start(args, format);
682 ret = _make_remark_v(ctx, type, format, args);
683 va_end(args);
684 return ret;
685 }
686
687 static int pam_winbind_request(struct pwb_context *ctx,
688 enum winbindd_cmd req_type,
689 struct winbindd_request *request,
690 struct winbindd_response *response)
691 {
692 /* Fill in request and send down pipe */
693 winbindd_init_request(request, req_type);
694
695 if (winbind_write_sock(request, sizeof(*request), 0, 0) == -1) {
696 _pam_log(ctx, LOG_ERR,
697 "pam_winbind_request: write to socket failed!");
698 winbind_close_sock();
699 return PAM_SERVICE_ERR;
700 }
701
702 /* Wait for reply */
703 if (winbindd_read_reply(response) == -1) {
704 _pam_log(ctx, LOG_ERR,
705 "pam_winbind_request: read from socket failed!");
706 winbind_close_sock();
707 return PAM_SERVICE_ERR;
708 }
709
710 /* We are done with the socket - close it and avoid mischeif */
711 winbind_close_sock();
712
713 /* Copy reply data from socket */
714 if (response->result == WINBINDD_OK) {
715 return PAM_SUCCESS;
716 }
717
718 /* no need to check for pam_error codes for getpwnam() */
719 switch (req_type) {
720
721 case WINBINDD_GETPWNAM:
722 case WINBINDD_LOOKUPNAME:
723 if (strlen(response->data.auth.nt_status_string) > 0) {
724 _pam_log(ctx, LOG_ERR,
725 "request failed, NT error was %s",
726 response->data.auth.nt_status_string);
727 } else {
728 _pam_log(ctx, LOG_ERR, "request failed");
729 }
730 return PAM_USER_UNKNOWN;
731 default:
732 break;
733 }
734
735 if (response->data.auth.pam_error != PAM_SUCCESS) {
736 _pam_log(ctx, LOG_ERR,
737 "request failed: %s, "
738 "PAM error was %s (%d), NT error was %s",
739 response->data.auth.error_string,
740 pam_strerror(ctx->pamh, response->data.auth.pam_error),
741 response->data.auth.pam_error,
742 response->data.auth.nt_status_string);
743 return response->data.auth.pam_error;
744 }
745
746 _pam_log(ctx, LOG_ERR, "request failed, but PAM error 0!");
747
748 return PAM_SERVICE_ERR;
749 }
750
751 static int pam_winbind_request_log(struct pwb_context *ctx,
752 int retval,
753 const char *user)
754 {
755 switch (retval) {
756 case PAM_AUTH_ERR:
757 /* incorrect password */
758 _pam_log(ctx, LOG_WARNING, "user '%s' denied access "
759 "(incorrect password or invalid membership)", user);
760 return retval;
761 case PAM_ACCT_EXPIRED:
762 /* account expired */
763 _pam_log(ctx, LOG_WARNING, "user '%s' account expired",
764 user);
765 return retval;
766 case PAM_AUTHTOK_EXPIRED:
767 /* password expired */
768 _pam_log(ctx, LOG_WARNING, "user '%s' password expired",
769 user);
770 return retval;
771 case PAM_NEW_AUTHTOK_REQD:
772 /* new password required */
773 _pam_log(ctx, LOG_WARNING, "user '%s' new password "
774 "required", user);
775 return retval;
776 case PAM_USER_UNKNOWN:
777 /* the user does not exist */
778 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
779 user);
780 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
781 return PAM_IGNORE;
782 }
783 return retval;
784 case PAM_SUCCESS:
785 /* Otherwise, the authentication looked good */
786 #if 0
787 switch (req_type) {
788 case WINBINDD_INFO:
789 break;
790 case WINBINDD_PAM_AUTH:
791 _pam_log(ctx, LOG_NOTICE,
792 "user '%s' granted access", user);
793 break;
794 case WINBINDD_PAM_CHAUTHTOK:
795 _pam_log(ctx, LOG_NOTICE,
796 "user '%s' password changed", user);
797 break;
798 default:
799 _pam_log(ctx, LOG_NOTICE,
800 "user '%s' OK", user);
801 break;
802 }
803 #endif
804 return retval;
805 default:
806 /* we don't know anything about this return value */
807 _pam_log(ctx, LOG_ERR,
808 "internal module error (retval = %d, user = '%s')",
809 retval, user);
810 return retval;
811 }
812 }
813
814 static int wbc_auth_error_to_pam_error(struct pwb_context *ctx,
815 struct wbcAuthErrorInfo *e,
816 wbcErr status,
817 const char *username,
818 const char *fn)
819 {
820 int ret = PAM_AUTH_ERR;
821
822 if (WBC_ERROR_IS_OK(status)) {
823 _pam_log_debug(ctx, LOG_DEBUG, "request %s succeeded",
824 fn);
825 ret = PAM_SUCCESS;
826 return pam_winbind_request_log(ctx, ret, username);
827 }
828
829 if (e) {
830 if (e->pam_error != PAM_SUCCESS) {
831 _pam_log(ctx, LOG_ERR,
832 "request %s failed: %s, "
833 "PAM error: %s (%d), NTSTATUS: %s, "
834 "Error message was: %s",
835 fn,
836 wbcErrorString(status),
837 _pam_error_code_str(e->pam_error),
838 e->pam_error,
839 e->nt_string,
840 e->display_string);
841 ret = e->pam_error;
842 return pam_winbind_request_log(ctx, ret, username);
843 }
844
845 _pam_log(ctx, LOG_ERR, "request %s failed, but PAM error 0!", fn);
846
847 ret = PAM_SERVICE_ERR;
848 return pam_winbind_request_log(ctx, ret, username);
849 }
850
851 ret = wbc_error_to_pam_error(status);
852 return pam_winbind_request_log(ctx, ret, username);
853 }
854
855
856 /**
857 * send a password expiry message if required
858 *
859 * @param ctx PAM winbind context.
860 * @param next_change expected (calculated) next expiry date.
861 * @param already_expired pointer to a boolean to indicate if the password is
862 * already expired.
863 *
864 * @return boolean Returns true if message has been sent, false if not.
865 */
866
867 static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
868 time_t next_change,
869 time_t now,
870 int warn_pwd_expire,
871 bool *already_expired)
872 {
873 int days = 0;
874 struct tm tm_now, tm_next_change;
875
876 if (already_expired) {
877 *already_expired = false;
878 }
879
880 if (next_change <= now) {
881 PAM_WB_REMARK_DIRECT(ctx, "NT_STATUS_PASSWORD_EXPIRED");
882 if (already_expired) {
883 *already_expired = true;
884 }
885 return true;
886 }
887
888 if ((next_change < 0) ||
889 (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
890 return false;
891 }
892
893 if ((localtime_r(&now, &tm_now) == NULL) ||
894 (localtime_r(&next_change, &tm_next_change) == NULL)) {
895 return false;
896 }
897
898 days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) -
899 (tm_now.tm_yday+tm_now.tm_year*365);
900
901 if (days == 0) {
902 _make_remark(ctx, PAM_TEXT_INFO,
903 "Your password expires today");
904 return true;
905 }
906
907 if (days > 0 && days < warn_pwd_expire) {
908 _make_remark_format(ctx, PAM_TEXT_INFO,
909 "Your password will expire in %d %s",
910 days, (days > 1) ? "days":"day");
911 return true;
912 }
913
914 return false;
915 }
916
917 /**
918 * Send a warning if the password expires in the near future
919 *
920 * @param ctx PAM winbind context.
921 * @param response The full authentication response structure.
922 * @param already_expired boolean, is the pwd already expired?
923 *
924 * @return void.
925 */
926
927 static void _pam_warn_password_expiry(struct pwb_context *ctx,
928 const struct winbindd_response *response,
929 int warn_pwd_expire,
930 bool *already_expired)
931 {
932 time_t now = time(NULL);
933 time_t next_change = 0;
934
935 if (already_expired) {
936 *already_expired = false;
937 }
938
939 /* accounts with ACB_PWNOEXP set never receive a warning */
940 if (response->data.auth.info3.acct_flags & ACB_PWNOEXP) {
941 return;
942 }
943
944 /* no point in sending a warning if this is a grace logon */
945 if (PAM_WB_GRACE_LOGON(response->data.auth.info3.user_flgs)) {
946 return;
947 }
948
949 /* check if the info3 must change timestamp has been set */
950 next_change = response->data.auth.info3.pass_must_change_time;
951
952 if (_pam_send_password_expiry_message(ctx, next_change, now,
953 warn_pwd_expire,
954 already_expired)) {
955 return;
956 }
957
958 /* now check for the global password policy */
959 /* good catch from Ralf Haferkamp: an expiry of "never" is translated
960 * to -1 */
961 if (response->data.auth.policy.expire <= 0) {
962 return;
963 }
964
965 next_change = response->data.auth.info3.pass_last_set_time +
966 response->data.auth.policy.expire;
967
968 if (_pam_send_password_expiry_message(ctx, next_change, now,
969 warn_pwd_expire,
970 already_expired)) {
971 return;
972 }
973
974 /* no warning sent */
975 }
976
977 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
978
979 /**
980 * Append a string, making sure not to overflow and to always return a
981 * NULL-terminated string.
982 *
983 * @param dest Destination string buffer (must already be NULL-terminated).
984 * @param src Source string buffer.
985 * @param dest_buffer_size Size of dest buffer in bytes.
986 *
987 * @return false if dest buffer is not big enough (no bytes copied), true on
988 * success.
989 */
990
991 static bool safe_append_string(char *dest,
992 const char *src,
993 int dest_buffer_size)
994 {
995 int dest_length = strlen(dest);
996 int src_length = strlen(src);
997
998 if (dest_length + src_length + 1 > dest_buffer_size) {
999 return false;
1000 }
1001
1002 memcpy(dest + dest_length, src, src_length + 1);
1003 return true;
1004 }
1005
1006 /**
1007 * Convert a names into a SID string, appending it to a buffer.
1008 *
1009 * @param ctx PAM winbind context.
1010 * @param user User in PAM request.
1011 * @param name Name to convert.
1012 * @param sid_list_buffer Where to append the string sid.
1013 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1014 *
1015 * @return false on failure, true on success.
1016 */
1017 static bool winbind_name_to_sid_string(struct pwb_context *ctx,
1018 const char *user,
1019 const char *name,
1020 char *sid_list_buffer,
1021 int sid_list_buffer_size)
1022 {
1023 const char* sid_string;
1024 struct winbindd_response sid_response;
1025
1026 /* lookup name? */
1027 if (IS_SID_STRING(name)) {
1028 sid_string = name;
1029 } else {
1030 struct winbindd_request sid_request;
1031
1032 ZERO_STRUCT(sid_request);
1033 ZERO_STRUCT(sid_response);
1034
1035 _pam_log_debug(ctx, LOG_DEBUG,
1036 "no sid given, looking up: %s\n", name);
1037
1038 /* fortunatly winbindd can handle non-separated names */
1039 strncpy(sid_request.data.name.name, name,
1040 sizeof(sid_request.data.name.name) - 1);
1041
1042 if (pam_winbind_request_log(ctx, WINBINDD_LOOKUPNAME,
1043 &sid_request, &sid_response,
1044 user)) {
1045 _pam_log(ctx, LOG_INFO,
1046 "could not lookup name: %s\n", name);
1047 return false;
1048 }
1049
1050 sid_string = sid_response.data.sid.sid;
1051 }
1052
1053 if (!safe_append_string(sid_list_buffer, sid_string,
1054 sid_list_buffer_size)) {
1055 return false;
1056 }
1057
1058 return true;
1059 }
1060
1061 /**
1062 * Convert a list of names into a list of sids.
1063 *
1064 * @param ctx PAM winbind context.
1065 * @param user User in PAM request.
1066 * @param name_list List of names or string sids, separated by commas.
1067 * @param sid_list_buffer Where to put the list of string sids.
1068 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1069 *
1070 * @return false on failure, true on success.
1071 */
1072 static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
1073 const char *user,
1074 const char *name_list,
1075 char *sid_list_buffer,
1076 int sid_list_buffer_size)
1077 {
1078 bool result = false;
1079 char *current_name = NULL;
1080 const char *search_location;
1081 const char *comma;
1082
1083 if (sid_list_buffer_size > 0) {
1084 sid_list_buffer[0] = 0;
1085 }
1086
1087 search_location = name_list;
1088 while ((comma = strstr(search_location, ",")) != NULL) {
1089 current_name = strndup(search_location,
1090 comma - search_location);
1091 if (NULL == current_name) {
1092 goto out;
1093 }
1094
1095 if (!winbind_name_to_sid_string(ctx, user,
1096 current_name,
1097 sid_list_buffer,
1098 sid_list_buffer_size)) {
1099 goto out;
1100 }
1101
1102 SAFE_FREE(current_name);
1103
1104 if (!safe_append_string(sid_list_buffer, ",",
1105 sid_list_buffer_size)) {
1106 goto out;
1107 }
1108
1109 search_location = comma + 1;
1110 }
1111
1112 if (!winbind_name_to_sid_string(ctx, user, search_location,
1113 sid_list_buffer,
1114 sid_list_buffer_size)) {
1115 goto out;
1116 }
1117
1118 result = true;
1119
1120 out:
1121 SAFE_FREE(current_name);
1122 return result;
1123 }
1124
1125 /**
1126 * put krb5ccname variable into environment
1127 *
1128 * @param ctx PAM winbind context.
1129 * @param krb5ccname env variable retrieved from winbindd.
1130 *
1131 * @return void.
1132 */
1133
1134 static void _pam_setup_krb5_env(struct pwb_context *ctx,
1135 const char *krb5ccname)
1136 {
1137 char var[PATH_MAX];
1138 int ret;
1139
1140 if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
1141 return;
1142 }
1143
1144 if (!krb5ccname || (strlen(krb5ccname) == 0)) {
1145 return;
1146 }
1147
1148 _pam_log_debug(ctx, LOG_DEBUG,
1149 "request returned KRB5CCNAME: %s", krb5ccname);
1150
1151 if (snprintf(var, sizeof(var), "KRB5CCNAME=%s", krb5ccname) == -1) {
1152 return;
1153 }
1154
1155 ret = pam_putenv(ctx->pamh, var);
1156 if (ret) {
1157 _pam_log(ctx, LOG_ERR,
1158 "failed to set KRB5CCNAME to %s: %s",
1159 var, pam_strerror(ctx->pamh, ret));
1160 }
1161 }
1162
1163 /**
1164 * Set string into the PAM stack.
1165 *
1166 * @param ctx PAM winbind context.
1167 * @param data_name Key name for pam_set_data.
1168 * @param value String value.
1169 *
1170 * @return void.
1171 */
1172
1173 static void _pam_set_data_string(struct pwb_context *ctx,
1174 const char *data_name,
1175 const char *value)
1176 {
1177 int ret;
1178
1179 if (!data_name || !value || (strlen(data_name) == 0) ||
1180 (strlen(value) == 0)) {
1181 return;
1182 }
1183
1184 ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
1185 _pam_winbind_cleanup_func);
1186 if (ret) {
1187 _pam_log_debug(ctx, LOG_DEBUG,
1188 "Could not set data %s: %s\n",
1189 data_name, pam_strerror(ctx->pamh, ret));
1190 }
1191 }
1192
1193 /**
1194 * Set info3 strings into the PAM stack.
1195 *
1196 * @param ctx PAM winbind context.
1197 * @param data_name Key name for pam_set_data.
1198 * @param value String value.
1199 *
1200 * @return void.
1201 */
1202
1203 static void _pam_set_data_info3(struct pwb_context *ctx,
1204 struct winbindd_response *response)
1205 {
1206 _pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
1207 response->data.auth.info3.home_dir);
1208 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
1209 response->data.auth.info3.logon_script);
1210 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
1211 response->data.auth.info3.logon_srv);
1212 _pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
1213 response->data.auth.info3.profile_path);
1214 }
1215
1216 /**
1217 * Free info3 strings in the PAM stack.
1218 *
1219 * @param pamh PAM handle
1220 *
1221 * @return void.
1222 */
1223
1224 static void _pam_free_data_info3(pam_handle_t *pamh)
1225 {
1226 pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1227 pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1228 pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1229 pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1230 }
1231
1232 /**
1233 * Send PAM_ERROR_MSG for cached or grace logons.
1234 *
1235 * @param ctx PAM winbind context.
1236 * @param username User in PAM request.
1237 * @param info3_user_flgs Info3 flags containing logon type bits.
1238 *
1239 * @return void.
1240 */
1241
1242 static void _pam_warn_logon_type(struct pwb_context *ctx,
1243 const char *username,
1244 uint32_t info3_user_flgs)
1245 {
1246 /* inform about logon type */
1247 if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1248
1249 _make_remark(ctx, PAM_ERROR_MSG,
1250 "Grace login. "
1251 "Please change your password as soon you're "
1252 "online again");
1253 _pam_log_debug(ctx, LOG_DEBUG,
1254 "User %s logged on using grace logon\n",
1255 username);
1256
1257 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1258
1259 _make_remark(ctx, PAM_ERROR_MSG,
1260 "Domain Controller unreachable, "
1261 "using cached credentials instead. "
1262 "Network resources may be unavailable");
1263 _pam_log_debug(ctx, LOG_DEBUG,
1264 "User %s logged on using cached credentials\n",
1265 username);
1266 }
1267 }
1268
1269 /**
1270 * Send PAM_ERROR_MSG for krb5 errors.
1271 *
1272 * @param ctx PAM winbind context.
1273 * @param username User in PAM request.
1274 * @param info3_user_flgs Info3 flags containing logon type bits.
1275 *
1276 * @return void.
1277 */
1278
1279 static void _pam_warn_krb5_failure(struct pwb_context *ctx,
1280 const char *username,
1281 uint32_t info3_user_flgs)
1282 {
1283 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1284 _make_remark(ctx, PAM_ERROR_MSG,
1285 "Failed to establish your Kerberos Ticket cache "
1286 "due time differences\n"
1287 "with the domain controller. "
1288 "Please verify the system time.\n");
1289 _pam_log_debug(ctx, LOG_DEBUG,
1290 "User %s: Clock skew when getting Krb5 TGT\n",
1291 username);
1292 }
1293 }
1294
1295 static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
1296 const struct wbcAuthErrorInfo *e,
1297 const char *nt_status_string,
1298 int *pam_error)
1299 {
1300 const char *ntstatus = NULL;
1301 const char *error_string = NULL;
1302
1303 if (!e || !pam_error) {
1304 return false;
1305 }
1306
1307 ntstatus = e->nt_string;
1308 if (!ntstatus) {
1309 return false;
1310 }
1311
1312 if (strcasecmp(ntstatus, nt_status_string) == 0) {
1313
1314 error_string = _get_ntstatus_error_string(nt_status_string);
1315 if (error_string) {
1316 _make_remark(ctx, PAM_ERROR_MSG, error_string);
1317 *pam_error = e->pam_error;
1318 return true;
1319 }
1320
1321 if (e->display_string) {
1322 _make_remark(ctx, PAM_ERROR_MSG, e->display_string);
1323 *pam_error = e->pam_error;
1324 return true;
1325 }
1326
1327 _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
1328 *pam_error = e->pam_error;
1329
1330 return true;
1331 }
1332
1333 return false;
1334 };
1335
1336 /**
1337 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1338 *
1339 * @param response The struct winbindd_response.
1340 *
1341 * @return string (caller needs to free).
1342 */
1343
1344 static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
1345 struct winbindd_response *response)
1346 {
1347 char *str = NULL;
1348
1349 str = talloc_asprintf(ctx, "Your password ");
1350 if (!str) {
1351 goto failed;
1352 }
1353
1354 if (response->data.auth.policy.min_length_password > 0) {
1355 str = talloc_asprintf_append(str,
1356 "must be at least %d characters; ",
1357 response->data.auth.policy.min_length_password);
1358 if (!str) {
1359 goto failed;
1360 }
1361 }
1362
1363 if (response->data.auth.policy.password_history > 0) {
1364 str = talloc_asprintf_append(str,
1365 "cannot repeat any of your previous %d "
1366 "passwords; ",
1367 response->data.auth.policy.password_history);
1368 if (!str) {
1369 goto failed;
1370 }
1371 }
1372
1373 if (response->data.auth.policy.password_properties &
1374 DOMAIN_PASSWORD_COMPLEX) {
1375 str = talloc_asprintf_append(str,
1376 "must contain capitals, numerals "
1377 "or punctuation; "
1378 "and cannot contain your account "
1379 "or full name; ");
1380 if (!str) {
1381 goto failed;
1382 }
1383 }
1384
1385 str = talloc_asprintf_append(str,
1386 "Please type a different password. "
1387 "Type a password which meets these requirements in "
1388 "both text boxes.");
1389 if (!str) {
1390 goto failed;
1391 }
1392
1393 return str;
1394
1395 failed:
1396 TALLOC_FREE(str);
1397 return NULL;
1398 }
1399
1400 /* talk to winbindd */
1401 static int winbind_auth_request(struct pwb_context *ctx,
1402 const char *user,
1403 const char *pass,
1404 const char *member,
1405 const char *cctype,
1406 const int warn_pwd_expire,
1407 struct winbindd_response *p_response,
1408 time_t *pwd_last_set,
1409 char **user_ret)
1410 {
1411 struct winbindd_request request;
1412 struct winbindd_response response;
1413 int ret;
1414 bool already_expired = false;
1415
1416 ZERO_STRUCT(request);
1417 ZERO_STRUCT(response);
1418
1419 if (pwd_last_set) {
1420 *pwd_last_set = 0;
1421 }
1422
1423 strncpy(request.data.auth.user, user,
1424 sizeof(request.data.auth.user)-1);
1425
1426 strncpy(request.data.auth.pass, pass,
1427 sizeof(request.data.auth.pass)-1);
1428
1429 request.data.auth.krb5_cc_type[0] = '\0';
1430 request.data.auth.uid = -1;
1431
1432 request.flags = WBFLAG_PAM_INFO3_TEXT | WBFLAG_PAM_GET_PWD_POLICY;
1433
1434 /* Krb5 auth always has to go against the KDC of the user's realm */
1435
1436 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1437 request.flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
1438 }
1439
1440 if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1441 struct passwd *pwd = NULL;
1442
1443 pwd = getpwnam(user);
1444 if (pwd == NULL) {
1445 return PAM_USER_UNKNOWN;
1446 }
1447 request.data.auth.uid = pwd->pw_uid;
1448 }
1449
1450 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1451
1452 _pam_log_debug(ctx, LOG_DEBUG,
1453 "enabling krb5 login flag\n");
1454
1455 request.flags |= WBFLAG_PAM_KRB5 |
1456 WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1457 }
1458
1459 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1460 _pam_log_debug(ctx, LOG_DEBUG,
1461 "enabling cached login flag\n");
1462 request.flags |= WBFLAG_PAM_CACHED_LOGIN;
1463 }
1464
1465 if (user_ret) {
1466 *user_ret = NULL;
1467 request.flags |= WBFLAG_PAM_UNIX_NAME;
1468 }
1469
1470 if (cctype != NULL) {
1471 strncpy(request.data.auth.krb5_cc_type, cctype,
1472 sizeof(request.data.auth.krb5_cc_type) - 1);
1473 _pam_log_debug(ctx, LOG_DEBUG,
1474 "enabling request for a %s krb5 ccache\n",
1475 cctype);
1476 }
1477
1478 request.data.auth.require_membership_of_sid[0] = '\0';
1479
1480 if (member != NULL) {
1481
1482 if (!winbind_name_list_to_sid_string_list(ctx, user,
1483 member,
1484 request.data.auth.require_membership_of_sid,
1485 sizeof(request.data.auth.require_membership_of_sid))) {
1486
1487 _pam_log_debug(ctx, LOG_ERR,
1488 "failed to serialize membership of sid "
1489 "\"%s\"\n", member);
1490 return PAM_AUTH_ERR;
1491 }
1492 }
1493
1494 ret = pam_winbind_request_log(ctx, WINBINDD_PAM_AUTH,
1495 &request, &response, user);
1496
1497 if (pwd_last_set) {
1498 *pwd_last_set = response.data.auth.info3.pass_last_set_time;
1499 }
1500
1501 if (p_response) {
1502 /* We want to process the response in the caller. */
1503 *p_response = response;
1504 return ret;
1505 }
1506
1507 if (ret) {
1508 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1509 "NT_STATUS_PASSWORD_EXPIRED");
1510 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1511 "NT_STATUS_PASSWORD_MUST_CHANGE");
1512 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1513 "NT_STATUS_INVALID_WORKSTATION");
1514 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1515 "NT_STATUS_INVALID_LOGON_HOURS");
1516 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1517 "NT_STATUS_ACCOUNT_EXPIRED");
1518 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1519 "NT_STATUS_ACCOUNT_DISABLED");
1520 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1521 "NT_STATUS_ACCOUNT_LOCKED_OUT");
1522 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1523 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT");
1524 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1525 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT");
1526 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1527 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT");
1528 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1529 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
1530 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1531 "NT_STATUS_NO_LOGON_SERVERS");
1532 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1533 "NT_STATUS_WRONG_PASSWORD");
1534 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1535 "NT_STATUS_ACCESS_DENIED");
1536 }
1537
1538 if (ret == PAM_SUCCESS) {
1539
1540 /* warn a user if the password is about to expire soon */
1541 _pam_warn_password_expiry(ctx, &response,
1542 warn_pwd_expire,
1543 &already_expired);
1544
1545 if (already_expired == true) {
1546 SMB_TIME_T last_set;
1547 last_set = response.data.auth.info3.pass_last_set_time;
1548 _pam_log_debug(ctx, LOG_DEBUG,
1549 "Password has expired "
1550 "(Password was last set: %lld, "
1551 "the policy says it should expire here "
1552 "%lld (now it's: %lu))\n",
1553 (long long int)last_set,
1554 (long long int)last_set +
1555 response.data.auth.policy.expire,
1556 time(NULL));
1557
1558 return PAM_AUTHTOK_EXPIRED;
1559 }
1560
1561 /* inform about logon type */
1562 _pam_warn_logon_type(ctx, user,
1563 response.data.auth.info3.user_flgs);
1564
1565 /* inform about krb5 failures */
1566 _pam_warn_krb5_failure(ctx, user,
1567 response.data.auth.info3.user_flgs);
1568
1569 /* set some info3 info for other modules in the stack */
1570 _pam_set_data_info3(ctx, &response);
1571
1572 /* put krb5ccname into env */
1573 _pam_setup_krb5_env(ctx, response.data.auth.krb5ccname);
1574
1575 /* If winbindd returned a username, return the pointer to it
1576 * here. */
1577 if (user_ret && response.data.auth.unix_username[0]) {
1578 /* We have to trust it's a null terminated string. */
1579 *user_ret = strndup(response.data.auth.unix_username,
1580 sizeof(response.data.auth.unix_username) - 1);
1581 }
1582 }
1583
1584 return ret;
1585 }
1586
1587 /* talk to winbindd */
1588 static int winbind_chauthtok_request(struct pwb_context *ctx,
1589 const char *user,
1590 const char *oldpass,
1591 const char *newpass,
1592 time_t pwd_last_set)
1593 {
1594 struct winbindd_request request;
1595 struct winbindd_response response;
1596 int ret;
1597
1598 ZERO_STRUCT(request);
1599 ZERO_STRUCT(response);
1600
1601 if (request.data.chauthtok.user == NULL) {
1602 return -2;
1603 }
1604
1605 strncpy(request.data.chauthtok.user, user,
1606 sizeof(request.data.chauthtok.user) - 1);
1607
1608 if (oldpass != NULL) {
1609 strncpy(request.data.chauthtok.oldpass, oldpass,
1610 sizeof(request.data.chauthtok.oldpass) - 1);
1611 } else {
1612 request.data.chauthtok.oldpass[0] = '\0';
1613 }
1614
1615 if (newpass != NULL) {
1616 strncpy(request.data.chauthtok.newpass, newpass,
1617 sizeof(request.data.chauthtok.newpass) - 1);
1618 } else {
1619 request.data.chauthtok.newpass[0] = '\0';
1620 }
1621
1622 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1623 request.flags = WBFLAG_PAM_KRB5 |
1624 WBFLAG_PAM_CONTACT_TRUSTDOM;
1625 }
1626
1627 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1628 request.flags |= WBFLAG_PAM_CACHED_LOGIN;
1629 }
1630
1631 ret = pam_winbind_request_log(ctx, WINBINDD_PAM_CHAUTHTOK,
1632 &request, &response, user);
1633
1634 if (ret == PAM_SUCCESS) {
1635 return ret;
1636 }
1637
1638 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1639 "NT_STATUS_BACKUP_CONTROLLER");
1640 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1641 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
1642 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1643 "NT_STATUS_NO_LOGON_SERVERS");
1644 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1645 "NT_STATUS_ACCESS_DENIED");
1646
1647 /* TODO: tell the min pwd length ? */
1648 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1649 "NT_STATUS_PWD_TOO_SHORT");
1650
1651 /* TODO: tell the minage ? */
1652 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1653 "NT_STATUS_PWD_TOO_RECENT");
1654
1655 /* TODO: tell the history length ? */
1656 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx, response,
1657 "NT_STATUS_PWD_HISTORY_CONFLICT");
1658
1659 if (!strcasecmp(response.data.auth.nt_status_string,
1660 "NT_STATUS_PASSWORD_RESTRICTION")) {
1661
1662 char *pwd_restriction_string = NULL;
1663 SMB_TIME_T min_pwd_age;
1664 uint32_t reject_reason = response.data.auth.reject_reason;
1665 min_pwd_age = response.data.auth.policy.min_passwordage;
1666
1667 /* FIXME: avoid to send multiple PAM messages after another */
1668 switch (reject_reason) {
1669 case -1:
1670 break;
1671 case SAMR_REJECT_OTHER:
1672 if ((min_pwd_age > 0) &&
1673 (pwd_last_set + min_pwd_age > time(NULL))) {
1674 PAM_WB_REMARK_DIRECT(ctx,
1675 "NT_STATUS_PWD_TOO_RECENT");
1676 }
1677 break;
1678 case SAMR_REJECT_TOO_SHORT:
1679 PAM_WB_REMARK_DIRECT(ctx,
1680 "NT_STATUS_PWD_TOO_SHORT");
1681 break;
1682 case SAMR_REJECT_IN_HISTORY:
1683 PAM_WB_REMARK_DIRECT(ctx,
1684 "NT_STATUS_PWD_HISTORY_CONFLICT");
1685 break;
1686 case SAMR_REJECT_COMPLEXITY:
1687 _make_remark(ctx, PAM_ERROR_MSG,
1688 "Password does not meet "
1689 "complexity requirements");
1690 break;
1691 default:
1692 _pam_log_debug(ctx, LOG_DEBUG,
1693 "unknown password change "
1694 "reject reason: %d",
1695 reject_reason);
1696 break;
1697 }
1698
1699 pwd_restriction_string =
1700 _pam_compose_pwd_restriction_string(ctx, &response);
1701 if (pwd_restriction_string) {
1702 _make_remark(ctx, PAM_ERROR_MSG,
1703 pwd_restriction_string);
1704 TALLOC_FREE(pwd_restriction_string);
1705 }
1706 }
1707
1708 return ret;
1709 }
1710
1711 /*
1712 * Checks if a user has an account
1713 *
1714 * return values:
1715 * 1 = User not found
1716 * 0 = OK
1717 * -1 = System error
1718 */
1719 static int valid_user(struct pwb_context *ctx,
1720 const char *user)
1721 {
1722 /* check not only if the user is available over NSS calls, also make
1723 * sure it's really a winbind user, this is important when stacking PAM
1724 * modules in the 'account' or 'password' facility. */
1725
1726 struct passwd *pwd = NULL;
1727 struct winbindd_request request;
1728 struct winbindd_response response;
1729 int ret;
1730
1731 ZERO_STRUCT(request);
1732 ZERO_STRUCT(response);
1733
1734 pwd = getpwnam(user);
1735 if (pwd == NULL) {
1736 return 1;
1737 }
1738
1739 strncpy(request.data.username, user,
1740 sizeof(request.data.username) - 1);
1741
1742 ret = pam_winbind_request_log(ctx, WINBINDD_GETPWNAM,
1743 &request, &response, user);
1744
1745 switch (ret) {
1746 case PAM_USER_UNKNOWN:
1747 return 1;
1748 case PAM_SUCCESS:
1749 return 0;
1750 default:
1751 break;
1752 }
1753 return -1;
1754 }
1755
1756 static char *_pam_delete(register char *xx)
1757 {
1758 _pam_overwrite(xx);
1759 _pam_drop(xx);
1760 return NULL;
1761 }
1762
1763 /*
1764 * obtain a password from the user
1765 */
1766
1767 static int _winbind_read_password(struct pwb_context *ctx,
1768 unsigned int ctrl,
1769 const char *comment,
1770 const char *prompt1,
1771 const char *prompt2,
1772 const char **pass)
1773 {
1774 int authtok_flag;
1775 int retval;
1776 const char *item;
1777 char *token;
1778
1779 _pam_log(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
1780
1781 /*
1782 * make sure nothing inappropriate gets returned
1783 */
1784
1785 *pass = token = NULL;
1786
1787 /*
1788 * which authentication token are we getting?
1789 */
1790
1791 if (on(WINBIND__OLD_PASSWORD, ctrl)) {
1792 authtok_flag = PAM_OLDAUTHTOK;
1793 } else {
1794 authtok_flag = PAM_AUTHTOK;
1795 }
1796
1797 /*
1798 * should we obtain the password from a PAM item ?
1799 */
1800
1801 if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
1802 on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
1803 retval = _pam_get_item(ctx->pamh, authtok_flag, &item);
1804 if (retval != PAM_SUCCESS) {
1805 /* very strange. */
1806 _pam_log(ctx, LOG_ALERT,
1807 "pam_get_item returned error "
1808 "to unix-read-password");
1809 return retval;
1810 } else if (item != NULL) { /* we have a password! */
1811 *pass = item;
1812 item = NULL;
1813 _pam_log(ctx, LOG_DEBUG,
1814 "pam_get_item returned a password");
1815 return PAM_SUCCESS;
1816 } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
1817 return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
1818 } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
1819 && off(WINBIND__OLD_PASSWORD, ctrl)) {
1820 return PAM_AUTHTOK_RECOVER_ERR;
1821 }
1822 }
1823 /*
1824 * getting here implies we will have to get the password from the
1825 * user directly.
1826 */
1827
1828 {
1829 struct pam_message msg[3], *pmsg[3];
1830 struct pam_response *resp;
1831 int i, replies;
1832
1833 /* prepare to converse */
1834
1835 if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
1836 pmsg[0] = &msg[0];
1837 msg[0].msg_style = PAM_TEXT_INFO;
1838 msg[0].msg = discard_const_p(char, comment);
1839 i = 1;
1840 } else {
1841 i = 0;
1842 }
1843
1844 pmsg[i] = &msg[i];
1845 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
1846 msg[i++].msg = discard_const_p(char, prompt1);
1847 replies = 1;
1848
1849 if (prompt2 != NULL) {
1850 pmsg[i] = &msg[i];
1851 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
1852 msg[i++].msg = discard_const_p(char, prompt2);
1853 ++replies;
1854 }
1855 /* so call the conversation expecting i responses */
1856 resp = NULL;
1857 retval = converse(ctx->pamh, i, pmsg, &resp);
1858 if (resp == NULL) {
1859 if (retval == PAM_SUCCESS) {
1860 retval = PAM_AUTHTOK_RECOVER_ERR;
1861 }
1862 goto done;
1863 }
1864 if (retval != PAM_SUCCESS) {
1865 _pam_drop_reply(resp, i);
1866 goto done;
1867 }
1868
1869 /* interpret the response */
1870
1871 token = x_strdup(resp[i - replies].resp);
1872 if (!token) {
1873 _pam_log(ctx, LOG_NOTICE,
1874 "could not recover "
1875 "authentication token");
1876 retval = PAM_AUTHTOK_RECOVER_ERR;
1877 goto done;
1878 }
1879
1880 if (replies == 2) {
1881 /* verify that password entered correctly */
1882 if (!resp[i - 1].resp ||
1883 strcmp(token, resp[i - 1].resp)) {
1884 _pam_delete(token); /* mistyped */
1885 retval = PAM_AUTHTOK_RECOVER_ERR;
1886 _make_remark(ctx, PAM_ERROR_MSG,
1887 MISTYPED_PASS);
1888 }
1889 }
1890
1891 /*
1892 * tidy up the conversation (resp_retcode) is ignored
1893 * -- what is it for anyway? AGM
1894 */
1895 _pam_drop_reply(resp, i);
1896 }
1897
1898 done:
1899 if (retval != PAM_SUCCESS) {
1900 _pam_log_debug(ctx, LOG_DEBUG,
1901 "unable to obtain a password");
1902 return retval;
1903 }
1904 /* 'token' is the entered password */
1905
1906 /* we store this password as an item */
1907
1908 retval = pam_set_item(ctx->pamh, authtok_flag, token);
1909 _pam_delete(token); /* clean it up */
1910 if (retval != PAM_SUCCESS ||
1911 (retval = _pam_get_item(ctx->pamh, authtok_flag, &item)) != PAM_SUCCESS) {
1912
1913 _pam_log(ctx, LOG_CRIT, "error manipulating password");
1914 return retval;
1915
1916 }
1917
1918 *pass = item;
1919 item = NULL; /* break link to password */
1920
1921 return PAM_SUCCESS;
1922 }
1923
1924 static const char *get_conf_item_string(struct pwb_context *ctx,
1925 const char *item,
1926 int config_flag)
1927 {
1928 int i = 0;
1929 const char *parm_opt = NULL;
1930
1931 if (!(ctx->ctrl & config_flag)) {
1932 goto out;
1933 }
1934
1935 /* let the pam opt take precedence over the pam_winbind.conf option */
1936 for (i=0; i<ctx->argc; i++) {
1937
1938 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
1939 char *p;
1940
1941 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
1942 _pam_log(ctx, LOG_INFO,
1943 "no \"=\" delimiter for \"%s\" found\n",
1944 item);
1945 goto out;
1946 }
1947 _pam_log_debug(ctx, LOG_INFO,
1948 "PAM config: %s '%s'\n", item, p+1);
1949 return p + 1;
1950 }
1951 }
1952
1953 if (ctx->dict) {
1954 char *key = NULL;
1955
1956 key = talloc_asprintf(ctx, "global:%s", item);
1957 if (!key) {
1958 goto out;
1959 }
1960
1961 parm_opt = iniparser_getstr(ctx->dict, key);
1962 TALLOC_FREE(key);
1963
1964 _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
1965 item, parm_opt);
1966 }
1967 out:
1968 return parm_opt;
1969 }
1970
1971 static int get_config_item_int(struct pwb_context *ctx,
1972 const char *item,
1973 int config_flag)
1974 {
1975 int i, parm_opt = -1;
1976
1977 if (!(ctx->ctrl & config_flag)) {
1978 goto out;
1979 }
1980
1981 /* let the pam opt take precedence over the pam_winbind.conf option */
1982 for (i = 0; i < ctx->argc; i++) {
1983
1984 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
1985 char *p;
1986
1987 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
1988 _pam_log(ctx, LOG_INFO,
1989 "no \"=\" delimiter for \"%s\" found\n",
1990 item);
1991 goto out;
1992 }
1993 parm_opt = atoi(p + 1);
1994 _pam_log_debug(ctx, LOG_INFO,
1995 "PAM config: %s '%d'\n",
1996 item, parm_opt);
1997 return parm_opt;
1998 }
1999 }
2000
2001 if (ctx->dict) {
2002 char *key = NULL;
2003
2004 key = talloc_asprintf(ctx, "global:%s", item);
2005 if (!key) {
2006 goto out;
2007 }
2008
2009 parm_opt = iniparser_getint(ctx->dict, key, -1);
2010 TALLOC_FREE(key);
2011
2012 _pam_log_debug(ctx, LOG_INFO,
2013 "CONFIG file: %s '%d'\n",
2014 item, parm_opt);
2015 }
2016 out:
2017 return parm_opt;
2018 }
2019
2020 static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
2021 {
2022 return get_conf_item_string(ctx, "krb5_ccache_type",
2023 WINBIND_KRB5_CCACHE_TYPE);
2024 }
2025
2026 static const char *get_member_from_config(struct pwb_context *ctx)
2027 {
2028 const char *ret = NULL;
2029 ret = get_conf_item_string(ctx, "require_membership_of",
2030 WINBIND_REQUIRED_MEMBERSHIP);
2031 if (ret) {
2032 return ret;
2033 }
2034 return get_conf_item_string(ctx, "require-membership-of",
2035 WINBIND_REQUIRED_MEMBERSHIP);
2036 }
2037
2038 static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
2039 {
2040 int ret;
2041 ret = get_config_item_int(ctx, "warn_pwd_expire",
2042 WINBIND_WARN_PWD_EXPIRE);
2043 /* no or broken setting */
2044 if (ret <= 0) {
2045 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
2046 }
2047 return ret;
2048 }
2049
2050 /**
2051 * Retrieve the winbind separator.
2052 *
2053 * @param ctx PAM winbind context.
2054 *
2055 * @return string separator character. NULL on failure.
2056 */
2057
2058 static char winbind_get_separator(struct pwb_context *ctx)
2059 {
2060 struct winbindd_request request;
2061 struct winbindd_response response;
2062
2063 ZERO_STRUCT(request);
2064 ZERO_STRUCT(response);
2065
2066 if (pam_winbind_request_log(ctx, WINBINDD_INFO,
2067 &request, &response, NULL)) {
2068 return '\0';
2069 }
2070
2071 return response.data.info.winbind_separator;
2072 }
2073
2074 /**
2075 * Convert a upn to a name.
2076 *
2077 * @param ctx PAM winbind context.
2078 * @param upn USer UPN to be trabslated.
2079 *
2080 * @return converted name. NULL pointer on failure. Caller needs to free.
2081 */
2082
2083 static char* winbind_upn_to_username(struct pwb_context *ctx,
2084 const char *upn)
2085 {
2086 struct winbindd_request req;
2087 struct winbindd_response resp;
2088 int retval;
2089 char sep;
2090
2091 /* This cannot work when the winbind separator = @ */
2092
2093 sep = winbind_get_separator(ctx);
2094 if (!sep || sep == '@') {
2095 return NULL;
2096 }
2097
2098 /* Convert the UPN to a SID */
2099
2100 ZERO_STRUCT(req);
2101 ZERO_STRUCT(resp);
2102
2103 strncpy(req.data.name.dom_name, "",
2104 sizeof(req.data.name.dom_name) - 1);
2105 strncpy(req.data.name.name, upn,
2106 sizeof(req.data.name.name) - 1);
2107 retval = pam_winbind_request_log(ctx, WINBINDD_LOOKUPNAME,
2108 &req, &resp, upn);
2109 if (retval != PAM_SUCCESS) {
2110 return NULL;
2111 }
2112
2113 /* Convert the the SID back to the sAMAccountName */
2114
2115 ZERO_STRUCT(req);
2116 strncpy(req.data.sid, resp.data.sid.sid, sizeof(req.data.sid)-1);
2117 ZERO_STRUCT(resp);
2118 retval = pam_winbind_request_log(ctx, WINBINDD_LOOKUPSID,
2119 &req, &resp, upn);
2120 if (retval != PAM_SUCCESS) {
2121 return NULL;
2122 }
2123
2124 return talloc_asprintf(ctx, "%s\\%s",
2125 resp.data.name.dom_name,
2126 resp.data.name.name);
2127 }
2128
2129 PAM_EXTERN
2130 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
2131 int argc, const char **argv)
2132 {
2133 const char *username;
2134 const char *password;
2135 const char *member = NULL;
2136 const char *cctype = NULL;
2137 int warn_pwd_expire;
2138 int retval = PAM_AUTH_ERR;
2139 char *username_ret = NULL;
2140 char *new_authtok_required = NULL;
2141 char *real_username = NULL;
2142 struct pwb_context *ctx = NULL;
2143
2144 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2145 if (retval) {
2146 goto out;
2147 }
2148
2149 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
2150
2151 /* Get the username */
2152 retval = pam_get_user(pamh, &username, NULL);
2153 if ((retval != PAM_SUCCESS) || (!username)) {
2154 _pam_log_debug(ctx, LOG_DEBUG,
2155 "can not get the username");
2156 retval = PAM_SERVICE_ERR;
2157 goto out;
2158 }
2159
2160
2161 #if defined(AIX)
2162 /* Decode the user name since AIX does not support logn user
2163 names by default. The name is encoded as _#uid. */
2164
2165 if (username[0] == '_') {
2166 uid_t id = atoi(&username[1]);
2167 struct passwd *pw = NULL;
2168
2169 if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
2170 real_username = strdup(pw->pw_name);
2171 }
2172 }
2173 #endif
2174
2175 if (!real_username) {
2176 /* Just making a copy of the username we got from PAM */
2177 if ((real_username = strdup(username)) == NULL) {
2178 _pam_log_debug(ctx, LOG_DEBUG,
2179 "memory allocation failure when copying "
2180 "username");
2181 retval = PAM_SERVICE_ERR;
2182 goto out;
2183 }
2184 }
2185
2186 /* Maybe this was a UPN */
2187
2188 if (strchr(real_username, '@') != NULL) {
2189 char *samaccountname = NULL;
2190
2191 samaccountname = winbind_upn_to_username(ctx,
2192 real_username);
2193 if (samaccountname) {
2194 free(real_username);
2195 real_username = strdup(samaccountname);
2196 }
2197 }
2198
2199 retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
2200 "Password: ", NULL,
2201 &password);
2202
2203 if (retval != PAM_SUCCESS) {
2204 _pam_log(ctx, LOG_ERR,
2205 "Could not retrieve user's password");
2206 retval = PAM_AUTHTOK_ERR;
2207 goto out;
2208 }
2209
2210 /* Let's not give too much away in the log file */
2211
2212 #ifdef DEBUG_PASSWORD
2213 _pam_log_debug(ctx, LOG_INFO,
2214 "Verify user '%s' with password '%s'",
2215 real_username, password);
2216 #else
2217 _pam_log_debug(ctx, LOG_INFO,
2218 "Verify user '%s'", real_username);
2219 #endif
2220
2221 member = get_member_from_config(ctx);
2222 cctype = get_krb5_cc_type_from_config(ctx);
2223 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2224
2225 /* Now use the username to look up password */
2226 retval = winbind_auth_request(ctx, real_username, password,
2227 member, cctype, warn_pwd_expire, NULL,
2228 NULL, &username_ret);
2229
2230 if (retval == PAM_NEW_AUTHTOK_REQD ||
2231 retval == PAM_AUTHTOK_EXPIRED) {
2232
2233 char *new_authtok_required_during_auth = NULL;
2234
2235 new_authtok_required = talloc_asprintf(NULL, "%d", retval);
2236 if (!new_authtok_required) {
2237 retval = PAM_BUF_ERR;
2238 goto out;
2239 }
2240
2241 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2242 new_authtok_required,
2243 _pam_winbind_cleanup_func);
2244
2245 retval = PAM_SUCCESS;
2246
2247 new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
2248 if (!new_authtok_required_during_auth) {
2249 retval = PAM_BUF_ERR;
2250 goto out;
2251 }
2252
2253 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2254 new_authtok_required_during_auth,
2255 _pam_winbind_cleanup_func);
2256
2257 goto out;
2258 }
2259
2260 out:
2261 if (username_ret) {
2262 pam_set_item (pamh, PAM_USER, username_ret);
2263 _pam_log_debug(ctx, LOG_INFO,
2264 "Returned user was '%s'", username_ret);
2265 free(username_ret);
2266 }
2267
2268 if (real_username) {
2269 free(real_username);
2270 }
2271
2272 if (!new_authtok_required) {
2273 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2274 }
2275
2276 if (retval != PAM_SUCCESS) {
2277 _pam_free_data_info3(pamh);
2278 }
2279
2280 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
2281
2282 TALLOC_FREE(ctx);
2283
2284 return retval;
2285 }
2286
2287 PAM_EXTERN
2288 int pam_sm_setcred(pam_handle_t *pamh, int flags,
2289 int argc, const char **argv)
2290 {
2291 int ret = PAM_SYSTEM_ERR;
2292 struct pwb_context *ctx = NULL;
2293
2294 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2295 if (ret) {
2296 goto out;
2297 }
2298
2299 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
2300
2301 switch (flags & ~PAM_SILENT) {
2302
2303 case PAM_DELETE_CRED:
2304 ret = pam_sm_close_session(pamh, flags, argc, argv);
2305 break;
2306 case PAM_REFRESH_CRED:
2307 _pam_log_debug(ctx, LOG_WARNING,
2308 "PAM_REFRESH_CRED not implemented");
2309 ret = PAM_SUCCESS;
2310 break;
2311 case PAM_REINITIALIZE_CRED:
2312 _pam_log_debug(ctx, LOG_WARNING,
2313 "PAM_REINITIALIZE_CRED not implemented");
2314 ret = PAM_SUCCESS;
2315 break;
2316 case PAM_ESTABLISH_CRED:
2317 _pam_log_debug(ctx, LOG_WARNING,
2318 "PAM_ESTABLISH_CRED not implemented");
2319 ret = PAM_SUCCESS;
2320 break;
2321 default:
2322 ret = PAM_SYSTEM_ERR;
2323 break;
2324 }
2325
2326 out:
2327
2328 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
2329
2330 TALLOC_FREE(ctx);
2331
2332 return ret;
2333 }
2334
2335 /*
2336 * Account management. We want to verify that the account exists
2337 * before returning PAM_SUCCESS
2338 */
2339 PAM_EXTERN
2340 int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2341 int argc, const char **argv)
2342 {
2343 const char *username;
2344 int ret = PAM_USER_UNKNOWN;
2345 void *tmp = NULL;
2346 struct pwb_context *ctx = NULL;
2347
2348 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2349 if (ret) {
2350 goto out;
2351 }
2352
2353 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
2354
2355
2356 /* Get the username */
2357 ret = pam_get_user(pamh, &username, NULL);
2358 if ((ret != PAM_SUCCESS) || (!username)) {
2359 _pam_log_debug(ctx, LOG_DEBUG,
2360 "can not get the username");
2361 ret = PAM_SERVICE_ERR;
2362 goto out;
2363 }
2364
2365 /* Verify the username */
2366 ret = valid_user(ctx, username);
2367 switch (ret) {
2368 case -1:
2369 /* some sort of system error. The log was already printed */
2370 ret = PAM_SERVICE_ERR;
2371 goto out;
2372 case 1:
2373 /* the user does not exist */
2374 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
2375 username);
2376 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
2377 ret = PAM_IGNORE;
2378 goto out;
2379 }
2380 ret = PAM_USER_UNKNOWN;
2381 goto out;
2382 case 0:
2383 pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2384 (const void **)&tmp);
2385 if (tmp != NULL) {
2386 ret = atoi((const char *)tmp);
2387 switch (ret) {
2388 case PAM_AUTHTOK_EXPIRED:
2389 /* fall through, since new token is required in this case */
2390 case PAM_NEW_AUTHTOK_REQD:
2391 _pam_log(ctx, LOG_WARNING,
2392 "pam_sm_acct_mgmt success but %s is set",
2393 PAM_WINBIND_NEW_AUTHTOK_REQD);
2394 _pam_log(ctx, LOG_NOTICE,
2395 "user '%s' needs new password",
2396 username);
2397 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2398 ret = PAM_NEW_AUTHTOK_REQD;
2399 goto out;
2400 default:
2401 _pam_log(ctx, LOG_WARNING,
2402 "pam_sm_acct_mgmt success");
2403 _pam_log(ctx, LOG_NOTICE,
2404 "user '%s' granted access", username);
2405 ret = PAM_SUCCESS;
2406 goto out;
2407 }
2408 }
2409
2410 /* Otherwise, the authentication looked good */
2411 _pam_log(ctx, LOG_NOTICE,
2412 "user '%s' granted access", username);
2413 ret = PAM_SUCCESS;
2414 goto out;
2415 default:
2416 /* we don't know anything about this return value */
2417 _pam_log(ctx, LOG_ERR,
2418 "internal module error (ret = %d, user = '%s')",
2419 ret, username);
2420 ret = PAM_SERVICE_ERR;
2421 goto out;
2422 }
2423
2424 /* should not be reached */
2425 ret = PAM_IGNORE;
2426
2427 out:
2428
2429 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
2430
2431 TALLOC_FREE(ctx);
2432
2433 return ret;
2434 }
2435
2436 PAM_EXTERN
2437 int pam_sm_open_session(pam_handle_t *pamh, int flags,
2438 int argc, const char **argv)
2439 {
2440 int ret = PAM_SYSTEM_ERR;
2441 struct pwb_context *ctx = NULL;
2442
2443 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2444 if (ret) {
2445 goto out;
2446 }
2447
2448 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
2449
2450 ret = PAM_SUCCESS;
2451
2452 out:
2453 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
2454
2455 TALLOC_FREE(ctx);
2456
2457 return ret;
2458 }
2459
2460 PAM_EXTERN
2461 int pam_sm_close_session(pam_handle_t *pamh, int flags,
2462 int argc, const char **argv)
2463 {
2464 int retval = PAM_SUCCESS;
2465 struct pwb_context *ctx = NULL;
2466
2467 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2468 if (retval) {
2469 goto out;
2470 }
2471
2472 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
2473
2474 if (!(flags & PAM_DELETE_CRED)) {
2475 retval = PAM_SUCCESS;
2476 goto out;
2477 }
2478
2479 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2480
2481 /* destroy the ccache here */
2482 struct winbindd_request request;
2483 struct winbindd_response response;
2484 const char *user;
2485 const char *ccname = NULL;
2486 struct passwd *pwd = NULL;
2487
2488 ZERO_STRUCT(request);
2489 ZERO_STRUCT(response);
2490
2491 retval = pam_get_user(pamh, &user, "Username: ");
2492 if (retval) {
2493 _pam_log(ctx, LOG_ERR,
2494 "could not identify user");
2495 goto out;
2496 }
2497
2498 if (user == NULL) {
2499 _pam_log(ctx, LOG_ERR,
2500 "username was NULL!");
2501 retval = PAM_USER_UNKNOWN;
2502 goto out;
2503 }
2504
2505 _pam_log_debug(ctx, LOG_DEBUG,
2506 "username [%s] obtained", user);
2507
2508 ccname = pam_getenv(pamh, "KRB5CCNAME");
2509 if (ccname == NULL) {
2510 _pam_log_debug(ctx, LOG_DEBUG,
2511 "user has no KRB5CCNAME environment");
2512 }
2513
2514 strncpy(request.data.logoff.user, user,
2515 sizeof(request.data.logoff.user) - 1);
2516
2517 if (ccname) {
2518 strncpy(request.data.logoff.krb5ccname, ccname,
2519 sizeof(request.data.logoff.krb5ccname) - 1);
2520 }
2521
2522 pwd = getpwnam(user);
2523 if (pwd == NULL) {
2524 retval = PAM_USER_UNKNOWN;
2525 goto out;
2526 }
2527 request.data.logoff.uid = pwd->pw_uid;
2528
2529 request.flags = WBFLAG_PAM_KRB5 |
2530 WBFLAG_PAM_CONTACT_TRUSTDOM;
2531
2532 retval = pam_winbind_request_log(ctx,
2533 WINBINDD_PAM_LOGOFF,
2534 &request, &response, user);
2535 }
2536
2537 out:
2538
2539 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, retval);
2540
2541 TALLOC_FREE(ctx);
2542
2543 return retval;
2544 }
2545
2546 /**
2547 * evaluate whether we need to re-authenticate with kerberos after a
2548 * password change
2549 *
2550 * @param ctx PAM winbind context.
2551 * @param user The username
2552 *
2553 * @return boolean Returns true if required, false if not.
2554 */
2555
2556 static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
2557 const char *user)
2558 {
2559
2560 /* Make sure that we only do this if a) the chauthtok got initiated
2561 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2562 * later password change via the "passwd" command if done by the user
2563 * itself
2564 * NB. If we login from gdm or xdm and the password expires,
2565 * we change the password, but there is no memory cache.
2566 * Thus, even for passthrough login, we should do the
2567 * authentication again to update memory cache.
2568 * --- BoYang
2569 * */
2570
2571 char *new_authtok_reqd_during_auth = NULL;
2572 struct passwd *pwd = NULL;
2573
2574 _pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2575 &new_authtok_reqd_during_auth);
2576 pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2577 NULL, NULL);
2578
2579 if (new_authtok_reqd_during_auth) {
2580 return true;
2581 }
2582
2583 pwd = getpwnam(user);
2584 if (!pwd) {
2585 return false;
2586 }
2587
2588 if (getuid() == pwd->pw_uid) {
2589 return true;
2590 }
2591
2592 return false;
2593 }
2594
2595
2596 PAM_EXTERN
2597 int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
2598 int argc, const char **argv)
2599 {
2600 unsigned int lctrl;
2601 int ret;
2602 bool cached_login = false;
2603
2604 /* <DO NOT free() THESE> */
2605 const char *user;
2606 char *pass_old, *pass_new;
2607 /* </DO NOT free() THESE> */
2608
2609 char *Announce;
2610
2611 int retry = 0;
2612 char *username_ret = NULL;
2613 struct winbindd_response response;
2614 struct pwb_context *ctx = NULL;
2615
2616 ZERO_STRUCT(response);
2617
2618 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2619 if (ret) {
2620 goto out;
2621 }
2622
2623 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
2624
2625 cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
2626
2627 /* clearing offline bit for auth */
2628 ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
2629
2630 /*
2631 * First get the name of a user
2632 */
2633 ret = pam_get_user(pamh, &user, "Username: ");
2634 if (ret) {
2635 _pam_log(ctx, LOG_ERR,
2636 "password - could not identify user");
2637 goto out;
2638 }
2639
2640 if (user == NULL) {
2641 _pam_log(ctx, LOG_ERR, "username was NULL!");
2642 ret = PAM_USER_UNKNOWN;
2643 goto out;
2644 }
2645
2646 _pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
2647
2648 /* check if this is really a user in winbindd, not only in NSS */
2649 ret = valid_user(ctx, user);
2650 switch (ret) {
2651 case 1:
2652 ret = PAM_USER_UNKNOWN;
2653 goto out;
2654 case -1:
2655 ret = PAM_SYSTEM_ERR;
2656 goto out;
2657 default:
2658 break;
2659 }
2660
2661 /*
2662 * obtain and verify the current password (OLDAUTHTOK) for
2663 * the user.
2664 */
2665
2666 if (flags & PAM_PRELIM_CHECK) {
2667 time_t pwdlastset_prelim = 0;
2668
2669 /* instruct user what is happening */
2670
2671 #define greeting "Changing password for"
2672 Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
2673 if (!Announce) {
2674 _pam_log(ctx, LOG_CRIT,
2675 "password - out of memory");
2676 ret = PAM_BUF_ERR;
2677 goto out;
2678 }
2679 #undef greeting
2680
2681 lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
2682 ret = _winbind_read_password(ctx, lctrl,
2683 Announce,
2684 "(current) NT password: ",
2685 NULL,
2686 (const char **) &pass_old);
2687 TALLOC_FREE(Announce);
2688 if (ret != PAM_SUCCESS) {
2689 _pam_log(ctx, LOG_NOTICE,
2690 "password - (old) token not obtained");
2691 goto out;
2692 }
2693
2694 /* verify that this is the password for this user */
2695
2696 ret = winbind_auth_request(ctx, user, pass_old,
2697 NULL, NULL, 0, &response,
2698 &pwdlastset_prelim, NULL);
2699
2700 if (ret != PAM_ACCT_EXPIRED &&
2701 ret != PAM_AUTHTOK_EXPIRED &&
2702 ret != PAM_NEW_AUTHTOK_REQD &&
2703 ret != PAM_SUCCESS) {
2704 pass_old = NULL;
2705 goto out;
2706 }
2707
2708 pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
2709 (void *)pwdlastset_prelim, NULL);
2710
2711 ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
2712 (const void *) pass_old);
2713 pass_old = NULL;
2714 if (ret != PAM_SUCCESS) {
2715 _pam_log(ctx, LOG_CRIT,
2716 "failed to set PAM_OLDAUTHTOK");
2717 }
2718 } else if (flags & PAM_UPDATE_AUTHTOK) {
2719
2720 time_t pwdlastset_update = 0;
2721
2722 /*
2723 * obtain the proposed password
2724 */
2725
2726 /*
2727 * get the old token back.
2728 */
2729
2730 ret = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
2731
2732 if (ret != PAM_SUCCESS) {
2733 _pam_log(ctx, LOG_NOTICE,
2734 "user not authenticated");
2735 goto out;
2736 }
2737
2738 lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
2739
2740 if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
2741 lctrl |= WINBIND_USE_FIRST_PASS_ARG;
2742 }
2743 retry = 0;
2744 ret = PAM_AUTHTOK_ERR;
2745 while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
2746 /*
2747 * use_authtok is to force the use of a previously entered
2748 * password -- needed for pluggable password strength checking
2749 */
2750
2751 ret = _winbind_read_password(ctx, lctrl,
2752 NULL,
2753 "Enter new NT password: ",
2754 "Retype new NT password: ",
2755 (const char **)&pass_new);
2756
2757 if (ret != PAM_SUCCESS) {
2758 _pam_log_debug(ctx, LOG_ALERT,
2759 "password - "
2760 "new password not obtained");
2761 pass_old = NULL;/* tidy up */
2762 goto out;
2763 }
2764
2765 /*
2766 * At this point we know who the user is and what they
2767 * propose as their new password. Verify that the new
2768 * password is acceptable.
2769 */
2770
2771 if (pass_new[0] == '\0') {/* "\0" password = NULL */
2772 pass_new = NULL;
2773 }
2774 }
2775
2776 /*
2777 * By reaching here we have approved the passwords and must now
2778 * rebuild the password database file.
2779 */
2780 _pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
2781 &pwdlastset_update);
2782
2783 /*
2784 * if cached creds were enabled, make sure to set the
2785 * WINBIND_CACHED_LOGIN bit here in order to have winbindd
2786 * update the cached creds storage - gd
2787 */
2788 if (cached_login) {
2789 ctx->ctrl |= WINBIND_CACHED_LOGIN;
2790 }
2791
2792 ret = winbind_chauthtok_request(ctx, user, pass_old,
2793 pass_new, pwdlastset_update);
2794 if (ret) {
2795 _pam_overwrite(pass_new);
2796 _pam_overwrite(pass_old);
2797 pass_old = pass_new = NULL;
2798 goto out;
2799 }
2800
2801 if (_pam_require_krb5_auth_after_chauthtok(ctx, user)) {
2802
2803 const char *member = NULL;
2804 const char *cctype = NULL;
2805 int warn_pwd_expire;
2806
2807 member = get_member_from_config(ctx);
2808 cctype = get_krb5_cc_type_from_config(ctx);
2809 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2810
2811 /* Keep WINBIND_CACHED_LOGIN bit for
2812 * authentication after changing the password.
2813 * This will update the cached credentials in case
2814 * that winbindd_dual_pam_chauthtok() fails
2815 * to update them.
2816 * --- BoYang
2817 * */
2818
2819 ret = winbind_auth_request(ctx, user, pass_new,
2820 member, cctype, 0, &response,
2821 NULL, &username_ret);
2822 _pam_overwrite(pass_new);
2823 _pam_overwrite(pass_old);
2824 pass_old = pass_new = NULL;
2825
2826 if (ret == PAM_SUCCESS) {
2827
2828 /* warn a user if the password is about to
2829 * expire soon */
2830 _pam_warn_password_expiry(ctx, &response,
2831 warn_pwd_expire,
2832 NULL);
2833
2834 /* set some info3 info for other modules in the
2835 * stack */
2836 _pam_set_data_info3(ctx, &response);
2837
2838 /* put krb5ccname into env */
2839 _pam_setup_krb5_env(ctx,
2840 response.data.auth.krb5ccname);
2841
2842 if (username_ret) {
2843 pam_set_item(pamh, PAM_USER,
2844 username_ret);
2845 _pam_log_debug(ctx, LOG_INFO,
2846 "Returned user was '%s'",
2847 username_ret);
2848 free(username_ret);
2849 }
2850 }
2851
2852 goto out;
2853 }
2854 } else {
2855 ret = PAM_SERVICE_ERR;
2856 }
2857
2858 out:
2859
2860 /* Deal with offline errors. */
2861 PAM_WB_REMARK_CHECK_RESPONSE(ctx, response,
2862 "NT_STATUS_NO_LOGON_SERVERS");
2863 PAM_WB_REMARK_CHECK_RESPONSE(ctx, response,
2864 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
2865 PAM_WB_REMARK_CHECK_RESPONSE(ctx, response,
2866 "NT_STATUS_ACCESS_DENIED");
2867
2868 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
2869
2870 TALLOC_FREE(ctx);
2871
2872 return ret;
2873 }
2874
2875 #ifdef PAM_STATIC
2876
2877 /* static module data */
2878
2879 struct pam_module _pam_winbind_modstruct = {
2880 MODULE_NAME,
2881 pam_sm_authenticate,
2882 pam_sm_setcred,
2883 pam_sm_acct_mgmt,
2884 pam_sm_open_session,
2885 pam_sm_close_session,
2886 pam_sm_chauthtok
2887 };
2888
2889 #endif
2890
2891 /*
2892 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
2893 * Copyright (c) Tim Potter <tpot@samba.org> 2000
2894 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
2895 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
2896 * Copyright (c) Jan Rêkorajski 1999.
2897 * Copyright (c) Andrew G. Morgan 1996-8.
2898 * Copyright (c) Alex O. Yuriev, 1996.
2899 * Copyright (c) Cristian Gafton 1996.
2900 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
2901 *
2902 * Redistribution and use in source and binary forms, with or without
2903 * modification, are permitted provided that the following conditions
2904 * are met:
2905 * 1. Redistributions of source code must retain the above copyright
2906 * notice, and the entire permission notice in its entirety,
2907 * including the disclaimer of warranties.
2908 * 2. Redistributions in binary form must reproduce the above copyright
2909 * notice, this list of conditions and the following disclaimer in the
2910 * documentation and/or other materials provided with the distribution.
2911 * 3. The name of the author may not be used to endorse or promote
2912 * products derived from this software without specific prior
2913 * written permission.
2914 *
2915 * ALTERNATIVELY, this product may be distributed under the terms of
2916 * the GNU Public License, in which case the provisions of the GPL are
2917 * required INSTEAD OF the above restrictions. (This clause is
2918 * necessary due to a potential bad interaction between the GPL and
2919 * the restrictions contained in a BSD-style copyright.)
2920 *
2921 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
2922 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
2923 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
2924 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
2925 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
2926 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
2927 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2928 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
2929 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
2930 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
2931 * OF THE POSSIBILITY OF SUCH DAMAGE.
2932 */