Do not use "finished" in winbind child
[Samba.git] / nsswitch / pam_winbind.c
blob545c87d0c4b811b168b0e76bafa1dd0da17484b3
1 /* pam_winbind module
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
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)
13 #include "pam_winbind.h"
15 static int wbc_error_to_pam_error(wbcErr status)
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;
47 /* be paranoid */
48 return PAM_AUTH_ERR;
51 static const char *_pam_error_code_str(int err)
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_RECOVER_ERR:
97 return "PAM_AUTHTOK_RECOVER_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;
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)
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)
146 /* data tokens */
148 #define MAX_PASSWD_TRIES 3
150 #ifdef HAVE_GETTEXT
151 static char initialized = 0;
153 static inline void textdomain_init(void);
154 static inline void textdomain_init(void)
156 if (!initialized) {
157 bindtextdomain(MODULE_NAME, dyn_LOCALEDIR);
158 initialized = 1;
160 return;
162 #endif
166 * Work around the pam API that has functions with void ** as parameters
167 * These lead to strict aliasing warnings with gcc.
169 static int _pam_get_item(const pam_handle_t *pamh,
170 int item_type,
171 const void *_item)
173 const void **item = (const void **)_item;
174 return pam_get_item(pamh, item_type, item);
176 static int _pam_get_data(const pam_handle_t *pamh,
177 const char *module_data_name,
178 const void *_data)
180 const void **data = (const void **)_data;
181 return pam_get_data(pamh, module_data_name, data);
184 /* some syslogging */
186 #ifdef HAVE_PAM_VSYSLOG
187 static void _pam_log_int(const pam_handle_t *pamh,
188 int err,
189 const char *format,
190 va_list args)
192 pam_vsyslog(pamh, err, format, args);
194 #else
195 static void _pam_log_int(const pam_handle_t *pamh,
196 int err,
197 const char *format,
198 va_list args)
200 char *format2 = NULL;
201 const char *service;
203 _pam_get_item(pamh, PAM_SERVICE, &service);
205 format2 = (char *)malloc(strlen(MODULE_NAME)+strlen(format)+strlen(service)+5);
206 if (format2 == NULL) {
207 /* what else todo ? */
208 vsyslog(err, format, args);
209 return;
212 sprintf(format2, "%s(%s): %s", MODULE_NAME, service, format);
213 vsyslog(err, format2, args);
214 SAFE_FREE(format2);
216 #endif /* HAVE_PAM_VSYSLOG */
218 static bool _pam_log_is_silent(int ctrl)
220 return on(ctrl, WINBIND_SILENT);
223 static void _pam_log(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
224 static void _pam_log(struct pwb_context *r, int err, const char *format, ...)
226 va_list args;
228 if (_pam_log_is_silent(r->ctrl)) {
229 return;
232 va_start(args, format);
233 _pam_log_int(r->pamh, err, format, args);
234 va_end(args);
236 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
237 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
239 va_list args;
241 if (_pam_log_is_silent(ctrl)) {
242 return;
245 va_start(args, format);
246 _pam_log_int(pamh, err, format, args);
247 va_end(args);
250 static bool _pam_log_is_debug_enabled(int ctrl)
252 if (ctrl == -1) {
253 return false;
256 if (_pam_log_is_silent(ctrl)) {
257 return false;
260 if (!(ctrl & WINBIND_DEBUG_ARG)) {
261 return false;
264 return true;
267 static bool _pam_log_is_debug_state_enabled(int ctrl)
269 if (!(ctrl & WINBIND_DEBUG_STATE)) {
270 return false;
273 return _pam_log_is_debug_enabled(ctrl);
276 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
277 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...)
279 va_list args;
281 if (!_pam_log_is_debug_enabled(r->ctrl)) {
282 return;
285 va_start(args, format);
286 _pam_log_int(r->pamh, err, format, args);
287 va_end(args);
289 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
290 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
292 va_list args;
294 if (!_pam_log_is_debug_enabled(ctrl)) {
295 return;
298 va_start(args, format);
299 _pam_log_int(pamh, err, format, args);
300 va_end(args);
303 static void _pam_log_state_datum(struct pwb_context *ctx,
304 int item_type,
305 const char *key,
306 int is_string)
308 const void *data = NULL;
309 if (item_type != 0) {
310 pam_get_item(ctx->pamh, item_type, &data);
311 } else {
312 pam_get_data(ctx->pamh, key, &data);
314 if (data != NULL) {
315 const char *type = (item_type != 0) ? "ITEM" : "DATA";
316 if (is_string != 0) {
317 _pam_log_debug(ctx, LOG_DEBUG,
318 "[pamh: %p] STATE: %s(%s) = \"%s\" (%p)",
319 ctx->pamh, type, key, (const char *)data,
320 data);
321 } else {
322 _pam_log_debug(ctx, LOG_DEBUG,
323 "[pamh: %p] STATE: %s(%s) = %p",
324 ctx->pamh, type, key, data);
329 #define _PAM_LOG_STATE_DATA_POINTER(ctx, module_data_name) \
330 _pam_log_state_datum(ctx, 0, module_data_name, 0)
332 #define _PAM_LOG_STATE_DATA_STRING(ctx, module_data_name) \
333 _pam_log_state_datum(ctx, 0, module_data_name, 1)
335 #define _PAM_LOG_STATE_ITEM_POINTER(ctx, item_type) \
336 _pam_log_state_datum(ctx, item_type, #item_type, 0)
338 #define _PAM_LOG_STATE_ITEM_STRING(ctx, item_type) \
339 _pam_log_state_datum(ctx, item_type, #item_type, 1)
341 #ifdef DEBUG_PASSWORD
342 #define _LOG_PASSWORD_AS_STRING 1
343 #else
344 #define _LOG_PASSWORD_AS_STRING 0
345 #endif
347 #define _PAM_LOG_STATE_ITEM_PASSWORD(ctx, item_type) \
348 _pam_log_state_datum(ctx, item_type, #item_type, \
349 _LOG_PASSWORD_AS_STRING)
351 static void _pam_log_state(struct pwb_context *ctx)
353 if (!_pam_log_is_debug_state_enabled(ctx->ctrl)) {
354 return;
357 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_SERVICE);
358 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER);
359 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_TTY);
360 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RHOST);
361 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RUSER);
362 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_OLDAUTHTOK);
363 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_AUTHTOK);
364 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER_PROMPT);
365 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_CONV);
366 #ifdef PAM_FAIL_DELAY
367 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_FAIL_DELAY);
368 #endif
369 #ifdef PAM_REPOSITORY
370 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_REPOSITORY);
371 #endif
373 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_HOMEDIR);
374 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSCRIPT);
375 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSERVER);
376 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_PROFILEPATH);
377 _PAM_LOG_STATE_DATA_STRING(ctx,
378 PAM_WINBIND_NEW_AUTHTOK_REQD);
379 /* Use atoi to get PAM result code */
380 _PAM_LOG_STATE_DATA_STRING(ctx,
381 PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
382 _PAM_LOG_STATE_DATA_POINTER(ctx, PAM_WINBIND_PWD_LAST_SET);
385 static int _pam_parse(const pam_handle_t *pamh,
386 int flags,
387 int argc,
388 const char **argv,
389 dictionary **result_d)
391 int ctrl = 0;
392 const char *config_file = NULL;
393 int i;
394 const char **v;
395 dictionary *d = NULL;
397 if (flags & PAM_SILENT) {
398 ctrl |= WINBIND_SILENT;
401 for (i=argc,v=argv; i-- > 0; ++v) {
402 if (!strncasecmp(*v, "config", strlen("config"))) {
403 ctrl |= WINBIND_CONFIG_FILE;
404 config_file = v[i];
405 break;
409 if (config_file == NULL) {
410 config_file = PAM_WINBIND_CONFIG_FILE;
413 d = iniparser_load(config_file);
414 if (d == NULL) {
415 goto config_from_pam;
418 if (iniparser_getboolean(d, "global:debug", false)) {
419 ctrl |= WINBIND_DEBUG_ARG;
422 if (iniparser_getboolean(d, "global:debug_state", false)) {
423 ctrl |= WINBIND_DEBUG_STATE;
426 if (iniparser_getboolean(d, "global:cached_login", false)) {
427 ctrl |= WINBIND_CACHED_LOGIN;
430 if (iniparser_getboolean(d, "global:krb5_auth", false)) {
431 ctrl |= WINBIND_KRB5_AUTH;
434 if (iniparser_getboolean(d, "global:silent", false)) {
435 ctrl |= WINBIND_SILENT;
438 if (iniparser_getstr(d, "global:krb5_ccache_type") != NULL) {
439 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
442 if ((iniparser_getstr(d, "global:require-membership-of") != NULL) ||
443 (iniparser_getstr(d, "global:require_membership_of") != NULL)) {
444 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
447 if (iniparser_getboolean(d, "global:try_first_pass", false)) {
448 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
451 if (iniparser_getint(d, "global:warn_pwd_expire", 0)) {
452 ctrl |= WINBIND_WARN_PWD_EXPIRE;
455 if (iniparser_getboolean(d, "global:mkhomedir", false)) {
456 ctrl |= WINBIND_MKHOMEDIR;
459 config_from_pam:
460 /* step through arguments */
461 for (i=argc,v=argv; i-- > 0; ++v) {
463 /* generic options */
464 if (!strcmp(*v,"debug"))
465 ctrl |= WINBIND_DEBUG_ARG;
466 else if (!strcasecmp(*v, "debug_state"))
467 ctrl |= WINBIND_DEBUG_STATE;
468 else if (!strcasecmp(*v, "silent"))
469 ctrl |= WINBIND_SILENT;
470 else if (!strcasecmp(*v, "use_authtok"))
471 ctrl |= WINBIND_USE_AUTHTOK_ARG;
472 else if (!strcasecmp(*v, "use_first_pass"))
473 ctrl |= WINBIND_USE_FIRST_PASS_ARG;
474 else if (!strcasecmp(*v, "try_first_pass"))
475 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
476 else if (!strcasecmp(*v, "unknown_ok"))
477 ctrl |= WINBIND_UNKNOWN_OK_ARG;
478 else if (!strncasecmp(*v, "require_membership_of",
479 strlen("require_membership_of")))
480 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
481 else if (!strncasecmp(*v, "require-membership-of",
482 strlen("require-membership-of")))
483 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
484 else if (!strcasecmp(*v, "krb5_auth"))
485 ctrl |= WINBIND_KRB5_AUTH;
486 else if (!strncasecmp(*v, "krb5_ccache_type",
487 strlen("krb5_ccache_type")))
488 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
489 else if (!strcasecmp(*v, "cached_login"))
490 ctrl |= WINBIND_CACHED_LOGIN;
491 else if (!strcasecmp(*v, "mkhomedir"))
492 ctrl |= WINBIND_MKHOMEDIR;
493 else {
494 __pam_log(pamh, ctrl, LOG_ERR,
495 "pam_parse: unknown option: %s", *v);
496 return -1;
501 if (result_d) {
502 *result_d = d;
503 } else {
504 if (d) {
505 iniparser_freedict(d);
509 return ctrl;
512 static int _pam_winbind_free_context(struct pwb_context *ctx)
514 if (!ctx) {
515 return 0;
518 if (ctx->dict) {
519 iniparser_freedict(ctx->dict);
522 return 0;
525 static int _pam_winbind_init_context(pam_handle_t *pamh,
526 int flags,
527 int argc,
528 const char **argv,
529 struct pwb_context **ctx_p)
531 struct pwb_context *r = NULL;
533 #ifdef HAVE_GETTEXT
534 textdomain_init();
535 #endif
537 r = TALLOC_ZERO_P(NULL, struct pwb_context);
538 if (!r) {
539 return PAM_BUF_ERR;
542 talloc_set_destructor(r, _pam_winbind_free_context);
544 r->pamh = pamh;
545 r->flags = flags;
546 r->argc = argc;
547 r->argv = argv;
548 r->ctrl = _pam_parse(pamh, flags, argc, argv, &r->dict);
549 if (r->ctrl == -1) {
550 TALLOC_FREE(r);
551 return PAM_SYSTEM_ERR;
554 *ctx_p = r;
556 return PAM_SUCCESS;
559 static void _pam_winbind_cleanup_func(pam_handle_t *pamh,
560 void *data,
561 int error_status)
563 int ctrl = _pam_parse(pamh, 0, 0, NULL, NULL);
564 if (_pam_log_is_debug_state_enabled(ctrl)) {
565 __pam_log_debug(pamh, ctrl, LOG_DEBUG,
566 "[pamh: %p] CLEAN: cleaning up PAM data %p "
567 "(error_status = %d)", pamh, data,
568 error_status);
570 TALLOC_FREE(data);
574 static const struct ntstatus_errors {
575 const char *ntstatus_string;
576 const char *error_string;
577 } ntstatus_errors[] = {
578 {"NT_STATUS_OK",
579 N_("Success")},
580 {"NT_STATUS_BACKUP_CONTROLLER",
581 N_("No primary Domain Controler available")},
582 {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
583 N_("No domain controllers found")},
584 {"NT_STATUS_NO_LOGON_SERVERS",
585 N_("No logon servers")},
586 {"NT_STATUS_PWD_TOO_SHORT",
587 N_("Password too short")},
588 {"NT_STATUS_PWD_TOO_RECENT",
589 N_("The password of this user is too recent to change")},
590 {"NT_STATUS_PWD_HISTORY_CONFLICT",
591 N_("Password is already in password history")},
592 {"NT_STATUS_PASSWORD_EXPIRED",
593 N_("Your password has expired")},
594 {"NT_STATUS_PASSWORD_MUST_CHANGE",
595 N_("You need to change your password now")},
596 {"NT_STATUS_INVALID_WORKSTATION",
597 N_("You are not allowed to logon from this workstation")},
598 {"NT_STATUS_INVALID_LOGON_HOURS",
599 N_("You are not allowed to logon at this time")},
600 {"NT_STATUS_ACCOUNT_EXPIRED",
601 N_("Your account has expired. "
602 "Please contact your System administrator")}, /* SCNR */
603 {"NT_STATUS_ACCOUNT_DISABLED",
604 N_("Your account is disabled. "
605 "Please contact your System administrator")}, /* SCNR */
606 {"NT_STATUS_ACCOUNT_LOCKED_OUT",
607 N_("Your account has been locked. "
608 "Please contact your System administrator")}, /* SCNR */
609 {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
610 N_("Invalid Trust Account")},
611 {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
612 N_("Invalid Trust Account")},
613 {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
614 N_("Invalid Trust Account")},
615 {"NT_STATUS_ACCESS_DENIED",
616 N_("Access is denied")},
617 {NULL, NULL}
620 static const char *_get_ntstatus_error_string(const char *nt_status_string)
622 int i;
623 for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
624 if (!strcasecmp(ntstatus_errors[i].ntstatus_string,
625 nt_status_string)) {
626 return _(ntstatus_errors[i].error_string);
629 return NULL;
632 /* --- authentication management functions --- */
634 /* Attempt a conversation */
636 static int converse(const pam_handle_t *pamh,
637 int nargs,
638 struct pam_message **message,
639 struct pam_response **response)
641 int retval;
642 struct pam_conv *conv;
644 retval = _pam_get_item(pamh, PAM_CONV, &conv);
645 if (retval == PAM_SUCCESS) {
646 retval = conv->conv(nargs,
647 (const struct pam_message **)message,
648 response, conv->appdata_ptr);
651 return retval; /* propagate error status */
655 static int _make_remark(struct pwb_context *ctx,
656 int type,
657 const char *text)
659 int retval = PAM_SUCCESS;
661 struct pam_message *pmsg[1], msg[1];
662 struct pam_response *resp;
664 if (ctx->flags & WINBIND_SILENT) {
665 return PAM_SUCCESS;
668 pmsg[0] = &msg[0];
669 msg[0].msg = discard_const_p(char, text);
670 msg[0].msg_style = type;
672 resp = NULL;
673 retval = converse(ctx->pamh, 1, pmsg, &resp);
675 if (resp) {
676 _pam_drop_reply(resp, 1);
678 return retval;
681 static int _make_remark_v(struct pwb_context *ctx,
682 int type,
683 const char *format,
684 va_list args)
686 char *var;
687 int ret;
689 ret = vasprintf(&var, format, args);
690 if (ret < 0) {
691 _pam_log(ctx, LOG_ERR, "memory allocation failure");
692 return ret;
695 ret = _make_remark(ctx, type, var);
696 SAFE_FREE(var);
697 return ret;
700 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
701 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...)
703 int ret;
704 va_list args;
706 va_start(args, format);
707 ret = _make_remark_v(ctx, type, format, args);
708 va_end(args);
709 return ret;
712 static int pam_winbind_request_log(struct pwb_context *ctx,
713 int retval,
714 const char *user,
715 const char *fn)
717 switch (retval) {
718 case PAM_AUTH_ERR:
719 /* incorrect password */
720 _pam_log(ctx, LOG_WARNING, "user '%s' denied access "
721 "(incorrect password or invalid membership)", user);
722 return retval;
723 case PAM_ACCT_EXPIRED:
724 /* account expired */
725 _pam_log(ctx, LOG_WARNING, "user '%s' account expired",
726 user);
727 return retval;
728 case PAM_AUTHTOK_EXPIRED:
729 /* password expired */
730 _pam_log(ctx, LOG_WARNING, "user '%s' password expired",
731 user);
732 return retval;
733 case PAM_NEW_AUTHTOK_REQD:
734 /* new password required */
735 _pam_log(ctx, LOG_WARNING, "user '%s' new password "
736 "required", user);
737 return retval;
738 case PAM_USER_UNKNOWN:
739 /* the user does not exist */
740 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
741 user);
742 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
743 return PAM_IGNORE;
745 return retval;
746 case PAM_SUCCESS:
747 /* Otherwise, the authentication looked good */
748 if (strcmp(fn, "wbcLogonUser") == 0) {
749 _pam_log(ctx, LOG_NOTICE,
750 "user '%s' granted access", user);
751 } else {
752 _pam_log(ctx, LOG_NOTICE,
753 "user '%s' OK", user);
755 return retval;
756 default:
757 /* we don't know anything about this return value */
758 _pam_log(ctx, LOG_ERR,
759 "internal module error (retval = %s(%d), user = '%s')",
760 _pam_error_code_str(retval), retval, user);
761 return retval;
765 static int wbc_auth_error_to_pam_error(struct pwb_context *ctx,
766 struct wbcAuthErrorInfo *e,
767 wbcErr status,
768 const char *username,
769 const char *fn)
771 int ret = PAM_AUTH_ERR;
773 if (WBC_ERROR_IS_OK(status)) {
774 _pam_log_debug(ctx, LOG_DEBUG, "request %s succeeded",
775 fn);
776 ret = PAM_SUCCESS;
777 return pam_winbind_request_log(ctx, ret, username, fn);
780 if (e) {
781 if (e->pam_error != PAM_SUCCESS) {
782 _pam_log(ctx, LOG_ERR,
783 "request %s failed: %s, "
784 "PAM error: %s (%d), NTSTATUS: %s, "
785 "Error message was: %s",
787 wbcErrorString(status),
788 _pam_error_code_str(e->pam_error),
789 e->pam_error,
790 e->nt_string,
791 e->display_string);
792 ret = e->pam_error;
793 return pam_winbind_request_log(ctx, ret, username, fn);
796 _pam_log(ctx, LOG_ERR, "request %s failed, but PAM error 0!", fn);
798 ret = PAM_SERVICE_ERR;
799 return pam_winbind_request_log(ctx, ret, username, fn);
802 ret = wbc_error_to_pam_error(status);
803 return pam_winbind_request_log(ctx, ret, username, fn);
808 * send a password expiry message if required
810 * @param ctx PAM winbind context.
811 * @param next_change expected (calculated) next expiry date.
812 * @param already_expired pointer to a boolean to indicate if the password is
813 * already expired.
815 * @return boolean Returns true if message has been sent, false if not.
818 static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
819 time_t next_change,
820 time_t now,
821 int warn_pwd_expire,
822 bool *already_expired)
824 int days = 0;
825 struct tm tm_now, tm_next_change;
827 if (already_expired) {
828 *already_expired = false;
831 if (next_change <= now) {
832 PAM_WB_REMARK_DIRECT(ctx, "NT_STATUS_PASSWORD_EXPIRED");
833 if (already_expired) {
834 *already_expired = true;
836 return true;
839 if ((next_change < 0) ||
840 (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
841 return false;
844 if ((localtime_r(&now, &tm_now) == NULL) ||
845 (localtime_r(&next_change, &tm_next_change) == NULL)) {
846 return false;
849 days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) -
850 (tm_now.tm_yday+tm_now.tm_year*365);
852 if (days == 0) {
853 _make_remark(ctx, PAM_TEXT_INFO,
854 _("Your password expires today"));
855 return true;
858 if (days > 0 && days < warn_pwd_expire) {
859 _make_remark_format(ctx, PAM_TEXT_INFO,
860 _("Your password will expire in %d %s"),
861 days, (days > 1) ? _("days"):_("day"));
862 return true;
865 return false;
869 * Send a warning if the password expires in the near future
871 * @param ctx PAM winbind context.
872 * @param response The full authentication response structure.
873 * @param already_expired boolean, is the pwd already expired?
875 * @return void.
878 static void _pam_warn_password_expiry(struct pwb_context *ctx,
879 const struct wbcAuthUserInfo *info,
880 const struct wbcUserPasswordPolicyInfo *policy,
881 int warn_pwd_expire,
882 bool *already_expired)
884 time_t now = time(NULL);
885 time_t next_change = 0;
887 if (!info || !policy) {
888 return;
891 if (already_expired) {
892 *already_expired = false;
895 /* accounts with WBC_ACB_PWNOEXP set never receive a warning */
896 if (info->acct_flags & WBC_ACB_PWNOEXP) {
897 return;
900 /* no point in sending a warning if this is a grace logon */
901 if (PAM_WB_GRACE_LOGON(info->user_flags)) {
902 return;
905 /* check if the info3 must change timestamp has been set */
906 next_change = info->pass_must_change_time;
908 if (_pam_send_password_expiry_message(ctx, next_change, now,
909 warn_pwd_expire,
910 already_expired)) {
911 return;
914 /* now check for the global password policy */
915 /* good catch from Ralf Haferkamp: an expiry of "never" is translated
916 * to -1 */
917 if (policy->expire == -1) {
918 return;
921 next_change = info->pass_last_set_time + policy->expire;
923 if (_pam_send_password_expiry_message(ctx, next_change, now,
924 warn_pwd_expire,
925 already_expired)) {
926 return;
929 /* no warning sent */
932 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
935 * Append a string, making sure not to overflow and to always return a
936 * NULL-terminated string.
938 * @param dest Destination string buffer (must already be NULL-terminated).
939 * @param src Source string buffer.
940 * @param dest_buffer_size Size of dest buffer in bytes.
942 * @return false if dest buffer is not big enough (no bytes copied), true on
943 * success.
946 static bool safe_append_string(char *dest,
947 const char *src,
948 int dest_buffer_size)
950 int dest_length = strlen(dest);
951 int src_length = strlen(src);
953 if (dest_length + src_length + 1 > dest_buffer_size) {
954 return false;
957 memcpy(dest + dest_length, src, src_length + 1);
958 return true;
962 * Convert a names into a SID string, appending it to a buffer.
964 * @param ctx PAM winbind context.
965 * @param user User in PAM request.
966 * @param name Name to convert.
967 * @param sid_list_buffer Where to append the string sid.
968 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
970 * @return false on failure, true on success.
972 static bool winbind_name_to_sid_string(struct pwb_context *ctx,
973 const char *user,
974 const char *name,
975 char *sid_list_buffer,
976 int sid_list_buffer_size)
978 const char* sid_string;
980 /* lookup name? */
981 if (IS_SID_STRING(name)) {
982 sid_string = name;
983 } else {
984 wbcErr wbc_status;
985 struct wbcDomainSid sid;
986 enum wbcSidType type;
987 char *sid_str;
989 _pam_log_debug(ctx, LOG_DEBUG,
990 "no sid given, looking up: %s\n", name);
992 wbc_status = wbcLookupName("", name, &sid, &type);
993 if (!WBC_ERROR_IS_OK(wbc_status)) {
994 _pam_log(ctx, LOG_INFO,
995 "could not lookup name: %s\n", name);
996 return false;
999 wbc_status = wbcSidToString(&sid, &sid_str);
1000 if (!WBC_ERROR_IS_OK(wbc_status)) {
1001 return false;
1004 wbcFreeMemory(sid_str);
1005 sid_string = sid_str;
1008 if (!safe_append_string(sid_list_buffer, sid_string,
1009 sid_list_buffer_size)) {
1010 return false;
1013 return true;
1017 * Convert a list of names into a list of sids.
1019 * @param ctx PAM winbind context.
1020 * @param user User in PAM request.
1021 * @param name_list List of names or string sids, separated by commas.
1022 * @param sid_list_buffer Where to put the list of string sids.
1023 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1025 * @return false on failure, true on success.
1027 static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
1028 const char *user,
1029 const char *name_list,
1030 char *sid_list_buffer,
1031 int sid_list_buffer_size)
1033 bool result = false;
1034 char *current_name = NULL;
1035 const char *search_location;
1036 const char *comma;
1038 if (sid_list_buffer_size > 0) {
1039 sid_list_buffer[0] = 0;
1042 search_location = name_list;
1043 while ((comma = strstr(search_location, ",")) != NULL) {
1044 current_name = strndup(search_location,
1045 comma - search_location);
1046 if (NULL == current_name) {
1047 goto out;
1050 if (!winbind_name_to_sid_string(ctx, user,
1051 current_name,
1052 sid_list_buffer,
1053 sid_list_buffer_size)) {
1054 goto out;
1057 SAFE_FREE(current_name);
1059 if (!safe_append_string(sid_list_buffer, ",",
1060 sid_list_buffer_size)) {
1061 goto out;
1064 search_location = comma + 1;
1067 if (!winbind_name_to_sid_string(ctx, user, search_location,
1068 sid_list_buffer,
1069 sid_list_buffer_size)) {
1070 goto out;
1073 result = true;
1075 out:
1076 SAFE_FREE(current_name);
1077 return result;
1081 * put krb5ccname variable into environment
1083 * @param ctx PAM winbind context.
1084 * @param krb5ccname env variable retrieved from winbindd.
1086 * @return void.
1089 static void _pam_setup_krb5_env(struct pwb_context *ctx,
1090 struct wbcLogonUserInfo *info)
1092 char var[PATH_MAX];
1093 int ret;
1094 uint32_t i;
1095 const char *krb5ccname = NULL;
1097 if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
1098 return;
1101 if (!info) {
1102 return;
1105 for (i=0; i < info->num_blobs; i++) {
1106 if (strcasecmp(info->blobs[i].name, "krb5ccname") == 0) {
1107 krb5ccname = (const char *)info->blobs[i].blob.data;
1108 break;
1112 if (!krb5ccname || (strlen(krb5ccname) == 0)) {
1113 return;
1116 _pam_log_debug(ctx, LOG_DEBUG,
1117 "request returned KRB5CCNAME: %s", krb5ccname);
1119 if (snprintf(var, sizeof(var), "KRB5CCNAME=%s", krb5ccname) == -1) {
1120 return;
1123 ret = pam_putenv(ctx->pamh, var);
1124 if (ret) {
1125 _pam_log(ctx, LOG_ERR,
1126 "failed to set KRB5CCNAME to %s: %s",
1127 var, pam_strerror(ctx->pamh, ret));
1132 * Copy unix username if available (further processed in PAM).
1134 * @param ctx PAM winbind context
1135 * @param user_ret A pointer that holds a pointer to a string
1136 * @param unix_username A username
1138 * @return void.
1141 static void _pam_setup_unix_username(struct pwb_context *ctx,
1142 char **user_ret,
1143 struct wbcLogonUserInfo *info)
1145 const char *unix_username = NULL;
1146 uint32_t i;
1148 if (!user_ret || !info) {
1149 return;
1152 for (i=0; i < info->num_blobs; i++) {
1153 if (strcasecmp(info->blobs[i].name, "unix_username") == 0) {
1154 unix_username = (const char *)info->blobs[i].blob.data;
1155 break;
1159 if (!unix_username || !unix_username[0]) {
1160 return;
1163 *user_ret = strdup(unix_username);
1167 * Set string into the PAM stack.
1169 * @param ctx PAM winbind context.
1170 * @param data_name Key name for pam_set_data.
1171 * @param value String value.
1173 * @return void.
1176 static void _pam_set_data_string(struct pwb_context *ctx,
1177 const char *data_name,
1178 const char *value)
1180 int ret;
1182 if (!data_name || !value || (strlen(data_name) == 0) ||
1183 (strlen(value) == 0)) {
1184 return;
1187 ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
1188 _pam_winbind_cleanup_func);
1189 if (ret) {
1190 _pam_log_debug(ctx, LOG_DEBUG,
1191 "Could not set data %s: %s\n",
1192 data_name, pam_strerror(ctx->pamh, ret));
1197 * Set info3 strings into the PAM stack.
1199 * @param ctx PAM winbind context.
1200 * @param data_name Key name for pam_set_data.
1201 * @param value String value.
1203 * @return void.
1206 static void _pam_set_data_info3(struct pwb_context *ctx,
1207 const struct wbcAuthUserInfo *info)
1209 _pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
1210 info->home_directory);
1211 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
1212 info->logon_script);
1213 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
1214 info->logon_server);
1215 _pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
1216 info->profile_path);
1220 * Free info3 strings in the PAM stack.
1222 * @param pamh PAM handle
1224 * @return void.
1227 static void _pam_free_data_info3(pam_handle_t *pamh)
1229 pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1230 pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1231 pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1232 pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1236 * Send PAM_ERROR_MSG for cached or grace logons.
1238 * @param ctx PAM winbind context.
1239 * @param username User in PAM request.
1240 * @param info3_user_flgs Info3 flags containing logon type bits.
1242 * @return void.
1245 static void _pam_warn_logon_type(struct pwb_context *ctx,
1246 const char *username,
1247 uint32_t info3_user_flgs)
1249 /* inform about logon type */
1250 if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1252 _make_remark(ctx, PAM_ERROR_MSG,
1253 _("Grace login. "
1254 "Please change your password as soon you're "
1255 "online again"));
1256 _pam_log_debug(ctx, LOG_DEBUG,
1257 "User %s logged on using grace logon\n",
1258 username);
1260 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1262 _make_remark(ctx, PAM_ERROR_MSG,
1263 _("Domain Controller unreachable, "
1264 "using cached credentials instead. "
1265 "Network resources may be unavailable"));
1266 _pam_log_debug(ctx, LOG_DEBUG,
1267 "User %s logged on using cached credentials\n",
1268 username);
1273 * Send PAM_ERROR_MSG for krb5 errors.
1275 * @param ctx PAM winbind context.
1276 * @param username User in PAM request.
1277 * @param info3_user_flgs Info3 flags containing logon type bits.
1279 * @return void.
1282 static void _pam_warn_krb5_failure(struct pwb_context *ctx,
1283 const char *username,
1284 uint32_t info3_user_flgs)
1286 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1287 _make_remark(ctx, PAM_ERROR_MSG,
1288 _("Failed to establish your Kerberos Ticket cache "
1289 "due time differences\n"
1290 "with the domain controller. "
1291 "Please verify the system time.\n"));
1292 _pam_log_debug(ctx, LOG_DEBUG,
1293 "User %s: Clock skew when getting Krb5 TGT\n",
1294 username);
1298 static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
1299 const struct wbcAuthErrorInfo *e,
1300 const char *nt_status_string,
1301 int *pam_error)
1303 const char *ntstatus = NULL;
1304 const char *error_string = NULL;
1306 if (!e || !pam_error) {
1307 return false;
1310 ntstatus = e->nt_string;
1311 if (!ntstatus) {
1312 return false;
1315 if (strcasecmp(ntstatus, nt_status_string) == 0) {
1317 error_string = _get_ntstatus_error_string(nt_status_string);
1318 if (error_string) {
1319 _make_remark(ctx, PAM_ERROR_MSG, error_string);
1320 *pam_error = e->pam_error;
1321 return true;
1324 if (e->display_string) {
1325 _make_remark(ctx, PAM_ERROR_MSG, e->display_string);
1326 *pam_error = e->pam_error;
1327 return true;
1330 _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
1331 *pam_error = e->pam_error;
1333 return true;
1336 return false;
1340 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1342 * @param i The wbcUserPasswordPolicyInfo struct.
1344 * @return string (caller needs to talloc_free).
1347 static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
1348 struct wbcUserPasswordPolicyInfo *i)
1350 char *str = NULL;
1352 if (!i) {
1353 goto failed;
1356 str = talloc_asprintf(ctx, _("Your password "));
1357 if (!str) {
1358 goto failed;
1361 if (i->min_length_password > 0) {
1362 str = talloc_asprintf_append(str,
1363 _("must be at least %d characters; "),
1364 i->min_length_password);
1365 if (!str) {
1366 goto failed;
1370 if (i->password_history > 0) {
1371 str = talloc_asprintf_append(str,
1372 _("cannot repeat any of your previous %d "
1373 "passwords; "),
1374 i->password_history);
1375 if (!str) {
1376 goto failed;
1380 if (i->password_properties & WBC_DOMAIN_PASSWORD_COMPLEX) {
1381 str = talloc_asprintf_append(str,
1382 _("must contain capitals, numerals "
1383 "or punctuation; "
1384 "and cannot contain your account "
1385 "or full name; "));
1386 if (!str) {
1387 goto failed;
1391 str = talloc_asprintf_append(str,
1392 _("Please type a different password. "
1393 "Type a password which meets these requirements in "
1394 "both text boxes."));
1395 if (!str) {
1396 goto failed;
1399 return str;
1401 failed:
1402 TALLOC_FREE(str);
1403 return NULL;
1406 static int _pam_create_homedir(struct pwb_context *ctx,
1407 const char *dirname,
1408 mode_t mode)
1410 struct stat sbuf;
1412 if (stat(dirname, &sbuf) == 0) {
1413 return PAM_SUCCESS;
1416 if (mkdir(dirname, mode) != 0) {
1418 _make_remark_format(ctx, PAM_TEXT_INFO,
1419 _("Creating directory: %s failed: %s"),
1420 dirname, strerror(errno));
1421 _pam_log(ctx, LOG_ERR, "could not create dir: %s (%s)",
1422 dirname, strerror(errno));
1423 return PAM_PERM_DENIED;
1426 return PAM_SUCCESS;
1429 static int _pam_chown_homedir(struct pwb_context *ctx,
1430 const char *dirname,
1431 uid_t uid,
1432 gid_t gid)
1434 if (chown(dirname, uid, gid) != 0) {
1435 _pam_log(ctx, LOG_ERR, "failed to chown user homedir: %s (%s)",
1436 dirname, strerror(errno));
1437 return PAM_PERM_DENIED;
1440 return PAM_SUCCESS;
1443 static int _pam_mkhomedir(struct pwb_context *ctx)
1445 struct passwd *pwd = NULL;
1446 char *token = NULL;
1447 char *create_dir = NULL;
1448 char *user_dir = NULL;
1449 int ret;
1450 const char *username;
1451 mode_t mode = 0700;
1452 char *safe_ptr = NULL;
1453 char *p = NULL;
1455 /* Get the username */
1456 ret = pam_get_user(ctx->pamh, &username, NULL);
1457 if ((ret != PAM_SUCCESS) || (!username)) {
1458 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1459 return PAM_SERVICE_ERR;
1462 pwd = getpwnam(username);
1463 if (pwd == NULL) {
1464 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1465 return PAM_USER_UNKNOWN;
1467 _pam_log_debug(ctx, LOG_DEBUG, "homedir is: %s", pwd->pw_dir);
1469 ret = _pam_create_homedir(ctx, pwd->pw_dir, 0700);
1470 if (ret == PAM_SUCCESS) {
1471 ret = _pam_chown_homedir(ctx, pwd->pw_dir,
1472 pwd->pw_uid,
1473 pwd->pw_gid);
1476 if (ret == PAM_SUCCESS) {
1477 return ret;
1480 /* maybe we need to create parent dirs */
1481 create_dir = talloc_strdup(ctx, "/");
1482 if (!create_dir) {
1483 return PAM_BUF_ERR;
1486 /* find final directory */
1487 user_dir = strrchr(pwd->pw_dir, '/');
1488 if (!user_dir) {
1489 return PAM_BUF_ERR;
1491 user_dir++;
1493 _pam_log(ctx, LOG_DEBUG, "final directory: %s", user_dir);
1495 p = pwd->pw_dir;
1497 while ((token = strtok_r(p, "/", &safe_ptr)) != NULL) {
1499 mode = 0755;
1501 p = NULL;
1503 _pam_log_debug(ctx, LOG_DEBUG, "token is %s", token);
1505 create_dir = talloc_asprintf_append(create_dir, "%s/", token);
1506 if (!create_dir) {
1507 return PAM_BUF_ERR;
1509 _pam_log_debug(ctx, LOG_DEBUG, "current_dir is %s", create_dir);
1511 if (strcmp(token, user_dir) == 0) {
1512 _pam_log_debug(ctx, LOG_DEBUG, "assuming last directory: %s", token);
1513 mode = 0700;
1516 ret = _pam_create_homedir(ctx, create_dir, mode);
1517 if (ret) {
1518 return ret;
1522 return _pam_chown_homedir(ctx, create_dir,
1523 pwd->pw_uid,
1524 pwd->pw_gid);
1527 /* talk to winbindd */
1528 static int winbind_auth_request(struct pwb_context *ctx,
1529 const char *user,
1530 const char *pass,
1531 const char *member,
1532 const char *cctype,
1533 const int warn_pwd_expire,
1534 struct wbcAuthErrorInfo **p_error,
1535 struct wbcLogonUserInfo **p_info,
1536 struct wbcUserPasswordPolicyInfo **p_policy,
1537 time_t *pwd_last_set,
1538 char **user_ret)
1540 wbcErr wbc_status;
1542 struct wbcLogonUserParams logon;
1543 char membership_of[1024];
1544 uid_t user_uid = -1;
1545 uint32_t flags = WBFLAG_PAM_INFO3_TEXT |
1546 WBFLAG_PAM_GET_PWD_POLICY;
1548 struct wbcLogonUserInfo *info = NULL;
1549 struct wbcAuthUserInfo *user_info = NULL;
1550 struct wbcAuthErrorInfo *error = NULL;
1551 struct wbcUserPasswordPolicyInfo *policy = NULL;
1553 int ret = PAM_AUTH_ERR;
1554 int i;
1555 const char *codes[] = {
1556 "NT_STATUS_PASSWORD_EXPIRED",
1557 "NT_STATUS_PASSWORD_MUST_CHANGE",
1558 "NT_STATUS_INVALID_WORKSTATION",
1559 "NT_STATUS_INVALID_LOGON_HOURS",
1560 "NT_STATUS_ACCOUNT_EXPIRED",
1561 "NT_STATUS_ACCOUNT_DISABLED",
1562 "NT_STATUS_ACCOUNT_LOCKED_OUT",
1563 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1564 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1565 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1566 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1567 "NT_STATUS_NO_LOGON_SERVERS",
1568 "NT_STATUS_WRONG_PASSWORD",
1569 "NT_STATUS_ACCESS_DENIED"
1572 if (pwd_last_set) {
1573 *pwd_last_set = 0;
1576 /* Krb5 auth always has to go against the KDC of the user's realm */
1578 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1579 flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
1582 if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1583 struct passwd *pwd = NULL;
1585 pwd = getpwnam(user);
1586 if (pwd == NULL) {
1587 return PAM_USER_UNKNOWN;
1589 user_uid = pwd->pw_uid;
1592 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1594 _pam_log_debug(ctx, LOG_DEBUG,
1595 "enabling krb5 login flag\n");
1597 flags |= WBFLAG_PAM_KRB5 |
1598 WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1601 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1602 _pam_log_debug(ctx, LOG_DEBUG,
1603 "enabling cached login flag\n");
1604 flags |= WBFLAG_PAM_CACHED_LOGIN;
1607 if (user_ret) {
1608 *user_ret = NULL;
1609 flags |= WBFLAG_PAM_UNIX_NAME;
1612 if (cctype != NULL) {
1613 _pam_log_debug(ctx, LOG_DEBUG,
1614 "enabling request for a %s krb5 ccache\n",
1615 cctype);
1618 if (member != NULL) {
1620 ZERO_STRUCT(membership_of);
1622 if (!winbind_name_list_to_sid_string_list(ctx, user, member,
1623 membership_of,
1624 sizeof(membership_of))) {
1625 _pam_log_debug(ctx, LOG_ERR,
1626 "failed to serialize membership of sid "
1627 "\"%s\"\n", member);
1628 return PAM_AUTH_ERR;
1632 ZERO_STRUCT(logon);
1634 logon.username = user;
1635 logon.password = pass;
1637 if (cctype) {
1638 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1639 &logon.blobs,
1640 "krb5_cc_type",
1642 (uint8_t *)cctype,
1643 strlen(cctype)+1);
1644 if (!WBC_ERROR_IS_OK(wbc_status)) {
1645 goto done;
1649 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1650 &logon.blobs,
1651 "flags",
1653 (uint8_t *)&flags,
1654 sizeof(flags));
1655 if (!WBC_ERROR_IS_OK(wbc_status)) {
1656 goto done;
1659 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1660 &logon.blobs,
1661 "user_uid",
1663 (uint8_t *)&user_uid,
1664 sizeof(user_uid));
1665 if (!WBC_ERROR_IS_OK(wbc_status)) {
1666 goto done;
1669 if (member) {
1670 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1671 &logon.blobs,
1672 "membership_of",
1674 (uint8_t *)membership_of,
1675 sizeof(membership_of));
1676 if (!WBC_ERROR_IS_OK(wbc_status)) {
1677 goto done;
1681 wbc_status = wbcLogonUser(&logon, &info, &error, &policy);
1682 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1683 user, "wbcLogonUser");
1684 wbcFreeMemory(logon.blobs);
1685 logon.blobs = NULL;
1687 if (info && info->info) {
1688 user_info = info->info;
1691 if (pwd_last_set && user_info) {
1692 *pwd_last_set = user_info->pass_last_set_time;
1695 if (p_info && info) {
1696 *p_info = info;
1699 if (p_policy && policy) {
1700 *p_policy = policy;
1703 if (p_error && error) {
1704 /* We want to process the error in the caller. */
1705 *p_error = error;
1706 return ret;
1709 for (i=0; i<ARRAY_SIZE(codes); i++) {
1710 int _ret = ret;
1711 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1712 ret = _ret;
1713 goto done;
1717 if ((ret == PAM_SUCCESS) && user_info && policy && info) {
1719 bool already_expired = false;
1721 /* warn a user if the password is about to expire soon */
1722 _pam_warn_password_expiry(ctx, user_info, policy,
1723 warn_pwd_expire,
1724 &already_expired);
1726 if (already_expired == true) {
1728 SMB_TIME_T last_set = user_info->pass_last_set_time;
1730 _pam_log_debug(ctx, LOG_DEBUG,
1731 "Password has expired "
1732 "(Password was last set: %lld, "
1733 "the policy says it should expire here "
1734 "%lld (now it's: %lu))\n",
1735 (long long int)last_set,
1736 (long long int)last_set +
1737 policy->expire,
1738 time(NULL));
1740 return PAM_AUTHTOK_EXPIRED;
1743 /* inform about logon type */
1744 _pam_warn_logon_type(ctx, user, user_info->user_flags);
1746 /* inform about krb5 failures */
1747 _pam_warn_krb5_failure(ctx, user, user_info->user_flags);
1749 /* set some info3 info for other modules in the stack */
1750 _pam_set_data_info3(ctx, user_info);
1752 /* put krb5ccname into env */
1753 _pam_setup_krb5_env(ctx, info);
1755 /* If winbindd returned a username, return the pointer to it
1756 * here. */
1757 _pam_setup_unix_username(ctx, user_ret, info);
1760 done:
1761 if (logon.blobs) {
1762 wbcFreeMemory(logon.blobs);
1764 if (info && info->blobs) {
1765 wbcFreeMemory(info->blobs);
1767 if (error && !p_error) {
1768 wbcFreeMemory(error);
1770 if (info && !p_info) {
1771 wbcFreeMemory(info);
1773 if (policy && !p_policy) {
1774 wbcFreeMemory(policy);
1777 return ret;
1780 /* talk to winbindd */
1781 static int winbind_chauthtok_request(struct pwb_context *ctx,
1782 const char *user,
1783 const char *oldpass,
1784 const char *newpass,
1785 time_t pwd_last_set)
1787 wbcErr wbc_status;
1788 struct wbcChangePasswordParams params;
1789 struct wbcAuthErrorInfo *error = NULL;
1790 struct wbcUserPasswordPolicyInfo *policy = NULL;
1791 enum wbcPasswordChangeRejectReason reject_reason = -1;
1792 uint32_t flags = 0;
1794 int i;
1795 const char *codes[] = {
1796 "NT_STATUS_BACKUP_CONTROLLER",
1797 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1798 "NT_STATUS_NO_LOGON_SERVERS",
1799 "NT_STATUS_ACCESS_DENIED",
1800 "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1801 "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1802 "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1804 int ret = PAM_AUTH_ERR;
1806 ZERO_STRUCT(params);
1808 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1809 flags |= WBFLAG_PAM_KRB5 |
1810 WBFLAG_PAM_CONTACT_TRUSTDOM;
1813 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1814 flags |= WBFLAG_PAM_CACHED_LOGIN;
1817 params.account_name = user;
1818 params.level = WBC_AUTH_USER_LEVEL_PLAIN;
1819 params.old_password.plaintext = oldpass;
1820 params.new_password.plaintext = newpass;
1821 params.flags = flags;
1823 wbc_status = wbcChangeUserPasswordEx(&params, &error, &reject_reason, &policy);
1824 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1825 user, "wbcChangeUserPasswordEx");
1827 if (WBC_ERROR_IS_OK(wbc_status)) {
1828 _pam_log(ctx, LOG_NOTICE,
1829 "user '%s' password changed", user);
1830 return PAM_SUCCESS;
1833 if (!error) {
1834 wbcFreeMemory(policy);
1835 return ret;
1838 for (i=0; i<ARRAY_SIZE(codes); i++) {
1839 int _ret = ret;
1840 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1841 ret = _ret;
1842 goto done;
1846 if (!strcasecmp(error->nt_string,
1847 "NT_STATUS_PASSWORD_RESTRICTION")) {
1849 char *pwd_restriction_string = NULL;
1850 SMB_TIME_T min_pwd_age = 0;
1852 if (policy) {
1853 min_pwd_age = policy->min_passwordage;
1856 /* FIXME: avoid to send multiple PAM messages after another */
1857 switch (reject_reason) {
1858 case -1:
1859 break;
1860 case WBC_PWD_CHANGE_REJECT_OTHER:
1861 if ((min_pwd_age > 0) &&
1862 (pwd_last_set + min_pwd_age > time(NULL))) {
1863 PAM_WB_REMARK_DIRECT(ctx,
1864 "NT_STATUS_PWD_TOO_RECENT");
1866 break;
1867 case WBC_PWD_CHANGE_REJECT_TOO_SHORT:
1868 PAM_WB_REMARK_DIRECT(ctx,
1869 "NT_STATUS_PWD_TOO_SHORT");
1870 break;
1871 case WBC_PWD_CHANGE_REJECT_IN_HISTORY:
1872 PAM_WB_REMARK_DIRECT(ctx,
1873 "NT_STATUS_PWD_HISTORY_CONFLICT");
1874 break;
1875 case WBC_PWD_CHANGE_REJECT_COMPLEXITY:
1876 _make_remark(ctx, PAM_ERROR_MSG,
1877 _("Password does not meet "
1878 "complexity requirements"));
1879 break;
1880 default:
1881 _pam_log_debug(ctx, LOG_DEBUG,
1882 "unknown password change "
1883 "reject reason: %d",
1884 reject_reason);
1885 break;
1888 pwd_restriction_string =
1889 _pam_compose_pwd_restriction_string(ctx, policy);
1890 if (pwd_restriction_string) {
1891 _make_remark(ctx, PAM_ERROR_MSG,
1892 pwd_restriction_string);
1893 TALLOC_FREE(pwd_restriction_string);
1896 done:
1897 wbcFreeMemory(error);
1898 wbcFreeMemory(policy);
1900 return ret;
1904 * Checks if a user has an account
1906 * return values:
1907 * 1 = User not found
1908 * 0 = OK
1909 * -1 = System error
1911 static int valid_user(struct pwb_context *ctx,
1912 const char *user)
1914 /* check not only if the user is available over NSS calls, also make
1915 * sure it's really a winbind user, this is important when stacking PAM
1916 * modules in the 'account' or 'password' facility. */
1918 wbcErr wbc_status;
1919 struct passwd *pwd = NULL;
1920 struct passwd *wb_pwd = NULL;
1922 pwd = getpwnam(user);
1923 if (pwd == NULL) {
1924 return 1;
1927 wbc_status = wbcGetpwnam(user, &wb_pwd);
1928 wbcFreeMemory(wb_pwd);
1929 if (!WBC_ERROR_IS_OK(wbc_status)) {
1930 _pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
1931 wbcErrorString(wbc_status));
1934 switch (wbc_status) {
1935 case WBC_ERR_UNKNOWN_USER:
1936 return 1;
1937 case WBC_ERR_SUCCESS:
1938 return 0;
1939 default:
1940 break;
1942 return -1;
1945 static char *_pam_delete(register char *xx)
1947 _pam_overwrite(xx);
1948 _pam_drop(xx);
1949 return NULL;
1953 * obtain a password from the user
1956 static int _winbind_read_password(struct pwb_context *ctx,
1957 unsigned int ctrl,
1958 const char *comment,
1959 const char *prompt1,
1960 const char *prompt2,
1961 const char **pass)
1963 int authtok_flag;
1964 int retval;
1965 const char *item;
1966 char *token;
1968 _pam_log(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
1971 * make sure nothing inappropriate gets returned
1974 *pass = token = NULL;
1977 * which authentication token are we getting?
1980 if (on(WINBIND__OLD_PASSWORD, ctrl)) {
1981 authtok_flag = PAM_OLDAUTHTOK;
1982 } else {
1983 authtok_flag = PAM_AUTHTOK;
1987 * should we obtain the password from a PAM item ?
1990 if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
1991 on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
1992 retval = _pam_get_item(ctx->pamh, authtok_flag, &item);
1993 if (retval != PAM_SUCCESS) {
1994 /* very strange. */
1995 _pam_log(ctx, LOG_ALERT,
1996 "pam_get_item returned error "
1997 "to unix-read-password");
1998 return retval;
1999 } else if (item != NULL) { /* we have a password! */
2000 *pass = item;
2001 item = NULL;
2002 _pam_log(ctx, LOG_DEBUG,
2003 "pam_get_item returned a password");
2004 return PAM_SUCCESS;
2005 } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2006 return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
2007 } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
2008 && off(WINBIND__OLD_PASSWORD, ctrl)) {
2009 return PAM_AUTHTOK_RECOVER_ERR;
2013 * getting here implies we will have to get the password from the
2014 * user directly.
2018 struct pam_message msg[3], *pmsg[3];
2019 struct pam_response *resp;
2020 int i, replies;
2022 /* prepare to converse */
2024 if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
2025 pmsg[0] = &msg[0];
2026 msg[0].msg_style = PAM_TEXT_INFO;
2027 msg[0].msg = discard_const_p(char, comment);
2028 i = 1;
2029 } else {
2030 i = 0;
2033 pmsg[i] = &msg[i];
2034 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2035 msg[i++].msg = discard_const_p(char, prompt1);
2036 replies = 1;
2038 if (prompt2 != NULL) {
2039 pmsg[i] = &msg[i];
2040 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2041 msg[i++].msg = discard_const_p(char, prompt2);
2042 ++replies;
2044 /* so call the conversation expecting i responses */
2045 resp = NULL;
2046 retval = converse(ctx->pamh, i, pmsg, &resp);
2047 if (resp == NULL) {
2048 if (retval == PAM_SUCCESS) {
2049 retval = PAM_AUTHTOK_RECOVER_ERR;
2051 goto done;
2053 if (retval != PAM_SUCCESS) {
2054 _pam_drop_reply(resp, i);
2055 goto done;
2058 /* interpret the response */
2060 token = x_strdup(resp[i - replies].resp);
2061 if (!token) {
2062 _pam_log(ctx, LOG_NOTICE,
2063 "could not recover "
2064 "authentication token");
2065 retval = PAM_AUTHTOK_RECOVER_ERR;
2066 goto done;
2069 if (replies == 2) {
2070 /* verify that password entered correctly */
2071 if (!resp[i - 1].resp ||
2072 strcmp(token, resp[i - 1].resp)) {
2073 _pam_delete(token); /* mistyped */
2074 retval = PAM_AUTHTOK_RECOVER_ERR;
2075 _make_remark(ctx, PAM_ERROR_MSG,
2076 MISTYPED_PASS);
2081 * tidy up the conversation (resp_retcode) is ignored
2082 * -- what is it for anyway? AGM
2084 _pam_drop_reply(resp, i);
2087 done:
2088 if (retval != PAM_SUCCESS) {
2089 _pam_log_debug(ctx, LOG_DEBUG,
2090 "unable to obtain a password");
2091 return retval;
2093 /* 'token' is the entered password */
2095 /* we store this password as an item */
2097 retval = pam_set_item(ctx->pamh, authtok_flag, token);
2098 _pam_delete(token); /* clean it up */
2099 if (retval != PAM_SUCCESS ||
2100 (retval = _pam_get_item(ctx->pamh, authtok_flag, &item)) != PAM_SUCCESS) {
2102 _pam_log(ctx, LOG_CRIT, "error manipulating password");
2103 return retval;
2107 *pass = item;
2108 item = NULL; /* break link to password */
2110 return PAM_SUCCESS;
2113 static const char *get_conf_item_string(struct pwb_context *ctx,
2114 const char *item,
2115 int config_flag)
2117 int i = 0;
2118 const char *parm_opt = NULL;
2120 if (!(ctx->ctrl & config_flag)) {
2121 goto out;
2124 /* let the pam opt take precedence over the pam_winbind.conf option */
2125 for (i=0; i<ctx->argc; i++) {
2127 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2128 char *p;
2130 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2131 _pam_log(ctx, LOG_INFO,
2132 "no \"=\" delimiter for \"%s\" found\n",
2133 item);
2134 goto out;
2136 _pam_log_debug(ctx, LOG_INFO,
2137 "PAM config: %s '%s'\n", item, p+1);
2138 return p + 1;
2142 if (ctx->dict) {
2143 char *key = NULL;
2145 key = talloc_asprintf(ctx, "global:%s", item);
2146 if (!key) {
2147 goto out;
2150 parm_opt = iniparser_getstr(ctx->dict, key);
2151 TALLOC_FREE(key);
2153 _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
2154 item, parm_opt);
2156 out:
2157 return parm_opt;
2160 static int get_config_item_int(struct pwb_context *ctx,
2161 const char *item,
2162 int config_flag)
2164 int i, parm_opt = -1;
2166 if (!(ctx->ctrl & config_flag)) {
2167 goto out;
2170 /* let the pam opt take precedence over the pam_winbind.conf option */
2171 for (i = 0; i < ctx->argc; i++) {
2173 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2174 char *p;
2176 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2177 _pam_log(ctx, LOG_INFO,
2178 "no \"=\" delimiter for \"%s\" found\n",
2179 item);
2180 goto out;
2182 parm_opt = atoi(p + 1);
2183 _pam_log_debug(ctx, LOG_INFO,
2184 "PAM config: %s '%d'\n",
2185 item, parm_opt);
2186 return parm_opt;
2190 if (ctx->dict) {
2191 char *key = NULL;
2193 key = talloc_asprintf(ctx, "global:%s", item);
2194 if (!key) {
2195 goto out;
2198 parm_opt = iniparser_getint(ctx->dict, key, -1);
2199 TALLOC_FREE(key);
2201 _pam_log_debug(ctx, LOG_INFO,
2202 "CONFIG file: %s '%d'\n",
2203 item, parm_opt);
2205 out:
2206 return parm_opt;
2209 static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
2211 return get_conf_item_string(ctx, "krb5_ccache_type",
2212 WINBIND_KRB5_CCACHE_TYPE);
2215 static const char *get_member_from_config(struct pwb_context *ctx)
2217 const char *ret = NULL;
2218 ret = get_conf_item_string(ctx, "require_membership_of",
2219 WINBIND_REQUIRED_MEMBERSHIP);
2220 if (ret) {
2221 return ret;
2223 return get_conf_item_string(ctx, "require-membership-of",
2224 WINBIND_REQUIRED_MEMBERSHIP);
2227 static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
2229 int ret;
2230 ret = get_config_item_int(ctx, "warn_pwd_expire",
2231 WINBIND_WARN_PWD_EXPIRE);
2232 /* no or broken setting */
2233 if (ret <= 0) {
2234 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
2236 return ret;
2240 * Retrieve the winbind separator.
2242 * @param ctx PAM winbind context.
2244 * @return string separator character. NULL on failure.
2247 static char winbind_get_separator(struct pwb_context *ctx)
2249 wbcErr wbc_status;
2250 static struct wbcInterfaceDetails *details = NULL;
2252 wbc_status = wbcInterfaceDetails(&details);
2253 if (!WBC_ERROR_IS_OK(wbc_status)) {
2254 _pam_log(ctx, LOG_ERR,
2255 "Could not retrieve winbind interface details: %s",
2256 wbcErrorString(wbc_status));
2257 return '\0';
2260 if (!details) {
2261 return '\0';
2264 return details->winbind_separator;
2269 * Convert a upn to a name.
2271 * @param ctx PAM winbind context.
2272 * @param upn USer UPN to be trabslated.
2274 * @return converted name. NULL pointer on failure. Caller needs to free.
2277 static char* winbind_upn_to_username(struct pwb_context *ctx,
2278 const char *upn)
2280 char sep;
2281 wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
2282 struct wbcDomainSid sid;
2283 enum wbcSidType type;
2284 char *domain;
2285 char *name;
2287 /* This cannot work when the winbind separator = @ */
2289 sep = winbind_get_separator(ctx);
2290 if (!sep || sep == '@') {
2291 return NULL;
2294 /* Convert the UPN to a SID */
2296 wbc_status = wbcLookupName("", upn, &sid, &type);
2297 if (!WBC_ERROR_IS_OK(wbc_status)) {
2298 return NULL;
2301 /* Convert the the SID back to the sAMAccountName */
2303 wbc_status = wbcLookupSid(&sid, &domain, &name, &type);
2304 if (!WBC_ERROR_IS_OK(wbc_status)) {
2305 return NULL;
2308 return talloc_asprintf(ctx, "%s\\%s", domain, name);
2311 static int _pam_delete_cred(pam_handle_t *pamh, int flags,
2312 int argc, const char **argv)
2314 int retval = PAM_SUCCESS;
2315 struct pwb_context *ctx = NULL;
2316 struct wbcLogoffUserParams logoff;
2317 struct wbcAuthErrorInfo *error = NULL;
2318 const char *user;
2319 wbcErr wbc_status = WBC_ERR_SUCCESS;
2321 ZERO_STRUCT(logoff);
2323 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2324 if (retval) {
2325 goto out;
2328 _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
2330 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2332 /* destroy the ccache here */
2334 uint32_t wbc_flags = 0;
2335 const char *ccname = NULL;
2336 struct passwd *pwd = NULL;
2338 retval = pam_get_user(pamh, &user, _("Username: "));
2339 if (retval) {
2340 _pam_log(ctx, LOG_ERR,
2341 "could not identify user");
2342 goto out;
2345 if (user == NULL) {
2346 _pam_log(ctx, LOG_ERR,
2347 "username was NULL!");
2348 retval = PAM_USER_UNKNOWN;
2349 goto out;
2352 _pam_log_debug(ctx, LOG_DEBUG,
2353 "username [%s] obtained", user);
2355 ccname = pam_getenv(pamh, "KRB5CCNAME");
2356 if (ccname == NULL) {
2357 _pam_log_debug(ctx, LOG_DEBUG,
2358 "user has no KRB5CCNAME environment");
2361 pwd = getpwnam(user);
2362 if (pwd == NULL) {
2363 retval = PAM_USER_UNKNOWN;
2364 goto out;
2367 wbc_flags = WBFLAG_PAM_KRB5 |
2368 WBFLAG_PAM_CONTACT_TRUSTDOM;
2370 logoff.username = user;
2372 if (ccname) {
2373 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2374 &logoff.blobs,
2375 "ccfilename",
2377 (uint8_t *)ccname,
2378 strlen(ccname)+1);
2379 if (!WBC_ERROR_IS_OK(wbc_status)) {
2380 goto out;
2384 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2385 &logoff.blobs,
2386 "flags",
2388 (uint8_t *)&wbc_flags,
2389 sizeof(wbc_flags));
2390 if (!WBC_ERROR_IS_OK(wbc_status)) {
2391 goto out;
2394 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2395 &logoff.blobs,
2396 "user_uid",
2398 (uint8_t *)&pwd->pw_uid,
2399 sizeof(pwd->pw_uid));
2400 if (!WBC_ERROR_IS_OK(wbc_status)) {
2401 goto out;
2404 wbc_status = wbcLogoffUserEx(&logoff, &error);
2405 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2406 user, "wbcLogoffUser");
2407 wbcFreeMemory(error);
2408 wbcFreeMemory(logoff.blobs);
2409 logoff.blobs = NULL;
2411 if (!WBC_ERROR_IS_OK(wbc_status)) {
2412 _pam_log(ctx, LOG_INFO,
2413 "failed to logoff user %s: %s\n",
2414 user, wbcErrorString(wbc_status));
2418 out:
2419 if (logoff.blobs) {
2420 wbcFreeMemory(logoff.blobs);
2423 if (!WBC_ERROR_IS_OK(wbc_status)) {
2424 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2425 user, "wbcLogoffUser");
2429 * Delete the krb5 ccname variable from the PAM environment
2430 * if it was set by winbind.
2432 if ((ctx->ctrl & WINBIND_KRB5_AUTH) && pam_getenv(pamh, "KRB5CCNAME")) {
2433 pam_putenv(pamh, "KRB5CCNAME");
2436 _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx, retval);
2438 TALLOC_FREE(ctx);
2440 return retval;
2443 PAM_EXTERN
2444 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
2445 int argc, const char **argv)
2447 const char *username;
2448 const char *password;
2449 const char *member = NULL;
2450 const char *cctype = NULL;
2451 int warn_pwd_expire;
2452 int retval = PAM_AUTH_ERR;
2453 char *username_ret = NULL;
2454 char *new_authtok_required = NULL;
2455 char *real_username = NULL;
2456 struct pwb_context *ctx = NULL;
2458 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2459 if (retval) {
2460 goto out;
2463 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
2465 /* Get the username */
2466 retval = pam_get_user(pamh, &username, NULL);
2467 if ((retval != PAM_SUCCESS) || (!username)) {
2468 _pam_log_debug(ctx, LOG_DEBUG,
2469 "can not get the username");
2470 retval = PAM_SERVICE_ERR;
2471 goto out;
2475 #if defined(AIX)
2476 /* Decode the user name since AIX does not support logn user
2477 names by default. The name is encoded as _#uid. */
2479 if (username[0] == '_') {
2480 uid_t id = atoi(&username[1]);
2481 struct passwd *pw = NULL;
2483 if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
2484 real_username = strdup(pw->pw_name);
2487 #endif
2489 if (!real_username) {
2490 /* Just making a copy of the username we got from PAM */
2491 if ((real_username = strdup(username)) == NULL) {
2492 _pam_log_debug(ctx, LOG_DEBUG,
2493 "memory allocation failure when copying "
2494 "username");
2495 retval = PAM_SERVICE_ERR;
2496 goto out;
2500 /* Maybe this was a UPN */
2502 if (strchr(real_username, '@') != NULL) {
2503 char *samaccountname = NULL;
2505 samaccountname = winbind_upn_to_username(ctx,
2506 real_username);
2507 if (samaccountname) {
2508 free(real_username);
2509 real_username = strdup(samaccountname);
2513 retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
2514 _("Password: "), NULL,
2515 &password);
2517 if (retval != PAM_SUCCESS) {
2518 _pam_log(ctx, LOG_ERR,
2519 "Could not retrieve user's password");
2520 retval = PAM_AUTHTOK_ERR;
2521 goto out;
2524 /* Let's not give too much away in the log file */
2526 #ifdef DEBUG_PASSWORD
2527 _pam_log_debug(ctx, LOG_INFO,
2528 "Verify user '%s' with password '%s'",
2529 real_username, password);
2530 #else
2531 _pam_log_debug(ctx, LOG_INFO,
2532 "Verify user '%s'", real_username);
2533 #endif
2535 member = get_member_from_config(ctx);
2536 cctype = get_krb5_cc_type_from_config(ctx);
2537 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2539 /* Now use the username to look up password */
2540 retval = winbind_auth_request(ctx, real_username, password,
2541 member, cctype, warn_pwd_expire,
2542 NULL, NULL, NULL,
2543 NULL, &username_ret);
2545 if (retval == PAM_NEW_AUTHTOK_REQD ||
2546 retval == PAM_AUTHTOK_EXPIRED) {
2548 char *new_authtok_required_during_auth = NULL;
2550 new_authtok_required = talloc_asprintf(NULL, "%d", retval);
2551 if (!new_authtok_required) {
2552 retval = PAM_BUF_ERR;
2553 goto out;
2556 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2557 new_authtok_required,
2558 _pam_winbind_cleanup_func);
2560 retval = PAM_SUCCESS;
2562 new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
2563 if (!new_authtok_required_during_auth) {
2564 retval = PAM_BUF_ERR;
2565 goto out;
2568 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2569 new_authtok_required_during_auth,
2570 _pam_winbind_cleanup_func);
2572 goto out;
2575 out:
2576 if (username_ret) {
2577 pam_set_item (pamh, PAM_USER, username_ret);
2578 _pam_log_debug(ctx, LOG_INFO,
2579 "Returned user was '%s'", username_ret);
2580 free(username_ret);
2583 if (real_username) {
2584 free(real_username);
2587 if (!new_authtok_required) {
2588 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2591 if (retval != PAM_SUCCESS) {
2592 _pam_free_data_info3(pamh);
2595 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
2597 TALLOC_FREE(ctx);
2599 return retval;
2602 PAM_EXTERN
2603 int pam_sm_setcred(pam_handle_t *pamh, int flags,
2604 int argc, const char **argv)
2606 int ret = PAM_SYSTEM_ERR;
2607 struct pwb_context *ctx = NULL;
2609 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2610 if (ret) {
2611 goto out;
2614 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
2616 switch (flags & ~PAM_SILENT) {
2618 case PAM_DELETE_CRED:
2619 ret = _pam_delete_cred(pamh, flags, argc, argv);
2620 break;
2621 case PAM_REFRESH_CRED:
2622 _pam_log_debug(ctx, LOG_WARNING,
2623 "PAM_REFRESH_CRED not implemented");
2624 ret = PAM_SUCCESS;
2625 break;
2626 case PAM_REINITIALIZE_CRED:
2627 _pam_log_debug(ctx, LOG_WARNING,
2628 "PAM_REINITIALIZE_CRED not implemented");
2629 ret = PAM_SUCCESS;
2630 break;
2631 case PAM_ESTABLISH_CRED:
2632 _pam_log_debug(ctx, LOG_WARNING,
2633 "PAM_ESTABLISH_CRED not implemented");
2634 ret = PAM_SUCCESS;
2635 break;
2636 default:
2637 ret = PAM_SYSTEM_ERR;
2638 break;
2641 out:
2643 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
2645 TALLOC_FREE(ctx);
2647 return ret;
2651 * Account management. We want to verify that the account exists
2652 * before returning PAM_SUCCESS
2654 PAM_EXTERN
2655 int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2656 int argc, const char **argv)
2658 const char *username;
2659 int ret = PAM_USER_UNKNOWN;
2660 void *tmp = NULL;
2661 struct pwb_context *ctx = NULL;
2663 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2664 if (ret) {
2665 goto out;
2668 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
2671 /* Get the username */
2672 ret = pam_get_user(pamh, &username, NULL);
2673 if ((ret != PAM_SUCCESS) || (!username)) {
2674 _pam_log_debug(ctx, LOG_DEBUG,
2675 "can not get the username");
2676 ret = PAM_SERVICE_ERR;
2677 goto out;
2680 /* Verify the username */
2681 ret = valid_user(ctx, username);
2682 switch (ret) {
2683 case -1:
2684 /* some sort of system error. The log was already printed */
2685 ret = PAM_SERVICE_ERR;
2686 goto out;
2687 case 1:
2688 /* the user does not exist */
2689 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
2690 username);
2691 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
2692 ret = PAM_IGNORE;
2693 goto out;
2695 ret = PAM_USER_UNKNOWN;
2696 goto out;
2697 case 0:
2698 pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2699 (const void **)&tmp);
2700 if (tmp != NULL) {
2701 ret = atoi((const char *)tmp);
2702 switch (ret) {
2703 case PAM_AUTHTOK_EXPIRED:
2704 /* fall through, since new token is required in this case */
2705 case PAM_NEW_AUTHTOK_REQD:
2706 _pam_log(ctx, LOG_WARNING,
2707 "pam_sm_acct_mgmt success but %s is set",
2708 PAM_WINBIND_NEW_AUTHTOK_REQD);
2709 _pam_log(ctx, LOG_NOTICE,
2710 "user '%s' needs new password",
2711 username);
2712 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2713 ret = PAM_NEW_AUTHTOK_REQD;
2714 goto out;
2715 default:
2716 _pam_log(ctx, LOG_WARNING,
2717 "pam_sm_acct_mgmt success");
2718 _pam_log(ctx, LOG_NOTICE,
2719 "user '%s' granted access", username);
2720 ret = PAM_SUCCESS;
2721 goto out;
2725 /* Otherwise, the authentication looked good */
2726 _pam_log(ctx, LOG_NOTICE,
2727 "user '%s' granted access", username);
2728 ret = PAM_SUCCESS;
2729 goto out;
2730 default:
2731 /* we don't know anything about this return value */
2732 _pam_log(ctx, LOG_ERR,
2733 "internal module error (ret = %d, user = '%s')",
2734 ret, username);
2735 ret = PAM_SERVICE_ERR;
2736 goto out;
2739 /* should not be reached */
2740 ret = PAM_IGNORE;
2742 out:
2744 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
2746 TALLOC_FREE(ctx);
2748 return ret;
2751 PAM_EXTERN
2752 int pam_sm_open_session(pam_handle_t *pamh, int flags,
2753 int argc, const char **argv)
2755 int ret = PAM_SUCCESS;
2756 struct pwb_context *ctx = NULL;
2758 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2759 if (ret) {
2760 goto out;
2763 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
2765 if (ctx->ctrl & WINBIND_MKHOMEDIR) {
2766 /* check and create homedir */
2767 ret = _pam_mkhomedir(ctx);
2769 out:
2770 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
2772 TALLOC_FREE(ctx);
2774 return ret;
2777 PAM_EXTERN
2778 int pam_sm_close_session(pam_handle_t *pamh, int flags,
2779 int argc, const char **argv)
2781 int ret = PAM_SUCCESS;
2782 struct pwb_context *ctx = NULL;
2784 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2785 if (ret) {
2786 goto out;
2789 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
2791 out:
2792 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
2794 TALLOC_FREE(ctx);
2796 return ret;
2800 * evaluate whether we need to re-authenticate with kerberos after a
2801 * password change
2803 * @param ctx PAM winbind context.
2804 * @param user The username
2806 * @return boolean Returns true if required, false if not.
2809 static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
2810 const char *user)
2813 /* Make sure that we only do this if a) the chauthtok got initiated
2814 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2815 * later password change via the "passwd" command if done by the user
2816 * itself
2817 * NB. If we login from gdm or xdm and the password expires,
2818 * we change the password, but there is no memory cache.
2819 * Thus, even for passthrough login, we should do the
2820 * authentication again to update memory cache.
2821 * --- BoYang
2822 * */
2824 char *new_authtok_reqd_during_auth = NULL;
2825 struct passwd *pwd = NULL;
2827 _pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2828 &new_authtok_reqd_during_auth);
2829 pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2830 NULL, NULL);
2832 if (new_authtok_reqd_during_auth) {
2833 return true;
2836 pwd = getpwnam(user);
2837 if (!pwd) {
2838 return false;
2841 if (getuid() == pwd->pw_uid) {
2842 return true;
2845 return false;
2849 PAM_EXTERN
2850 int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
2851 int argc, const char **argv)
2853 unsigned int lctrl;
2854 int ret;
2855 bool cached_login = false;
2857 /* <DO NOT free() THESE> */
2858 const char *user;
2859 char *pass_old, *pass_new;
2860 /* </DO NOT free() THESE> */
2862 char *Announce;
2864 int retry = 0;
2865 char *username_ret = NULL;
2866 struct wbcAuthErrorInfo *error = NULL;
2867 struct pwb_context *ctx = NULL;
2869 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2870 if (ret) {
2871 goto out;
2874 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
2876 cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
2878 /* clearing offline bit for auth */
2879 ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
2882 * First get the name of a user
2884 ret = pam_get_user(pamh, &user, _("Username: "));
2885 if (ret) {
2886 _pam_log(ctx, LOG_ERR,
2887 "password - could not identify user");
2888 goto out;
2891 if (user == NULL) {
2892 _pam_log(ctx, LOG_ERR, "username was NULL!");
2893 ret = PAM_USER_UNKNOWN;
2894 goto out;
2897 _pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
2899 /* check if this is really a user in winbindd, not only in NSS */
2900 ret = valid_user(ctx, user);
2901 switch (ret) {
2902 case 1:
2903 ret = PAM_USER_UNKNOWN;
2904 goto out;
2905 case -1:
2906 ret = PAM_SYSTEM_ERR;
2907 goto out;
2908 default:
2909 break;
2913 * obtain and verify the current password (OLDAUTHTOK) for
2914 * the user.
2917 if (flags & PAM_PRELIM_CHECK) {
2918 time_t pwdlastset_prelim = 0;
2920 /* instruct user what is happening */
2922 #define greeting _("Changing password for")
2923 Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
2924 if (!Announce) {
2925 _pam_log(ctx, LOG_CRIT,
2926 "password - out of memory");
2927 ret = PAM_BUF_ERR;
2928 goto out;
2930 #undef greeting
2932 lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
2933 ret = _winbind_read_password(ctx, lctrl,
2934 Announce,
2935 _("(current) NT password: "),
2936 NULL,
2937 (const char **) &pass_old);
2938 TALLOC_FREE(Announce);
2939 if (ret != PAM_SUCCESS) {
2940 _pam_log(ctx, LOG_NOTICE,
2941 "password - (old) token not obtained");
2942 goto out;
2945 /* verify that this is the password for this user */
2947 ret = winbind_auth_request(ctx, user, pass_old,
2948 NULL, NULL, 0,
2949 &error, NULL, NULL,
2950 &pwdlastset_prelim, NULL);
2952 if (ret != PAM_ACCT_EXPIRED &&
2953 ret != PAM_AUTHTOK_EXPIRED &&
2954 ret != PAM_NEW_AUTHTOK_REQD &&
2955 ret != PAM_SUCCESS) {
2956 pass_old = NULL;
2957 goto out;
2960 pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
2961 (void *)pwdlastset_prelim, NULL);
2963 ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
2964 (const void *) pass_old);
2965 pass_old = NULL;
2966 if (ret != PAM_SUCCESS) {
2967 _pam_log(ctx, LOG_CRIT,
2968 "failed to set PAM_OLDAUTHTOK");
2970 } else if (flags & PAM_UPDATE_AUTHTOK) {
2972 time_t pwdlastset_update = 0;
2975 * obtain the proposed password
2979 * get the old token back.
2982 ret = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
2984 if (ret != PAM_SUCCESS) {
2985 _pam_log(ctx, LOG_NOTICE,
2986 "user not authenticated");
2987 goto out;
2990 lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
2992 if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
2993 lctrl |= WINBIND_USE_FIRST_PASS_ARG;
2995 retry = 0;
2996 ret = PAM_AUTHTOK_ERR;
2997 while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
2999 * use_authtok is to force the use of a previously entered
3000 * password -- needed for pluggable password strength checking
3003 ret = _winbind_read_password(ctx, lctrl,
3004 NULL,
3005 _("Enter new NT password: "),
3006 _("Retype new NT password: "),
3007 (const char **)&pass_new);
3009 if (ret != PAM_SUCCESS) {
3010 _pam_log_debug(ctx, LOG_ALERT,
3011 "password - "
3012 "new password not obtained");
3013 pass_old = NULL;/* tidy up */
3014 goto out;
3018 * At this point we know who the user is and what they
3019 * propose as their new password. Verify that the new
3020 * password is acceptable.
3023 if (pass_new[0] == '\0') {/* "\0" password = NULL */
3024 pass_new = NULL;
3029 * By reaching here we have approved the passwords and must now
3030 * rebuild the password database file.
3032 _pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3033 &pwdlastset_update);
3036 * if cached creds were enabled, make sure to set the
3037 * WINBIND_CACHED_LOGIN bit here in order to have winbindd
3038 * update the cached creds storage - gd
3040 if (cached_login) {
3041 ctx->ctrl |= WINBIND_CACHED_LOGIN;
3044 ret = winbind_chauthtok_request(ctx, user, pass_old,
3045 pass_new, pwdlastset_update);
3046 if (ret) {
3047 _pam_overwrite(pass_new);
3048 _pam_overwrite(pass_old);
3049 pass_old = pass_new = NULL;
3050 goto out;
3053 if (_pam_require_krb5_auth_after_chauthtok(ctx, user)) {
3055 const char *member = NULL;
3056 const char *cctype = NULL;
3057 int warn_pwd_expire;
3058 struct wbcLogonUserInfo *info = NULL;
3059 struct wbcUserPasswordPolicyInfo *policy = NULL;
3061 member = get_member_from_config(ctx);
3062 cctype = get_krb5_cc_type_from_config(ctx);
3063 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
3065 /* Keep WINBIND_CACHED_LOGIN bit for
3066 * authentication after changing the password.
3067 * This will update the cached credentials in case
3068 * that winbindd_dual_pam_chauthtok() fails
3069 * to update them.
3070 * --- BoYang
3071 * */
3073 ret = winbind_auth_request(ctx, user, pass_new,
3074 member, cctype, 0,
3075 &error, &info, &policy,
3076 NULL, &username_ret);
3077 _pam_overwrite(pass_new);
3078 _pam_overwrite(pass_old);
3079 pass_old = pass_new = NULL;
3081 if (ret == PAM_SUCCESS) {
3083 struct wbcAuthUserInfo *user_info = NULL;
3085 if (info && info->info) {
3086 user_info = info->info;
3089 /* warn a user if the password is about to
3090 * expire soon */
3091 _pam_warn_password_expiry(ctx, user_info, policy,
3092 warn_pwd_expire,
3093 NULL);
3095 /* set some info3 info for other modules in the
3096 * stack */
3097 _pam_set_data_info3(ctx, user_info);
3099 /* put krb5ccname into env */
3100 _pam_setup_krb5_env(ctx, info);
3102 if (username_ret) {
3103 pam_set_item(pamh, PAM_USER,
3104 username_ret);
3105 _pam_log_debug(ctx, LOG_INFO,
3106 "Returned user was '%s'",
3107 username_ret);
3108 free(username_ret);
3111 wbcFreeMemory(info);
3112 wbcFreeMemory(policy);
3115 goto out;
3117 } else {
3118 ret = PAM_SERVICE_ERR;
3121 out:
3123 /* Deal with offline errors. */
3124 int i;
3125 const char *codes[] = {
3126 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3127 "NT_STATUS_NO_LOGON_SERVERS",
3128 "NT_STATUS_ACCESS_DENIED"
3131 for (i=0; i<ARRAY_SIZE(codes); i++) {
3132 int _ret;
3133 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
3134 break;
3139 wbcFreeMemory(error);
3141 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
3143 TALLOC_FREE(ctx);
3145 return ret;
3148 #ifdef PAM_STATIC
3150 /* static module data */
3152 struct pam_module _pam_winbind_modstruct = {
3153 MODULE_NAME,
3154 pam_sm_authenticate,
3155 pam_sm_setcred,
3156 pam_sm_acct_mgmt,
3157 pam_sm_open_session,
3158 pam_sm_close_session,
3159 pam_sm_chauthtok
3162 #endif
3165 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3166 * Copyright (c) Tim Potter <tpot@samba.org> 2000
3167 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3168 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3169 * Copyright (c) Jan Rêkorajski 1999.
3170 * Copyright (c) Andrew G. Morgan 1996-8.
3171 * Copyright (c) Alex O. Yuriev, 1996.
3172 * Copyright (c) Cristian Gafton 1996.
3173 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3175 * Redistribution and use in source and binary forms, with or without
3176 * modification, are permitted provided that the following conditions
3177 * are met:
3178 * 1. Redistributions of source code must retain the above copyright
3179 * notice, and the entire permission notice in its entirety,
3180 * including the disclaimer of warranties.
3181 * 2. Redistributions in binary form must reproduce the above copyright
3182 * notice, this list of conditions and the following disclaimer in the
3183 * documentation and/or other materials provided with the distribution.
3184 * 3. The name of the author may not be used to endorse or promote
3185 * products derived from this software without specific prior
3186 * written permission.
3188 * ALTERNATIVELY, this product may be distributed under the terms of
3189 * the GNU Public License, in which case the provisions of the GPL are
3190 * required INSTEAD OF the above restrictions. (This clause is
3191 * necessary due to a potential bad interaction between the GPL and
3192 * the restrictions contained in a BSD-style copyright.)
3194 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3195 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3196 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3197 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3198 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3199 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3200 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3201 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3202 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3203 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3204 * OF THE POSSIBILITY OF SUCH DAMAGE.