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)
20 case WBC_ERR_NOT_IMPLEMENTED:
21 return PAM_SERVICE_ERR;
22 case WBC_ERR_UNKNOWN_FAILURE:
24 case WBC_ERR_NO_MEMORY:
26 case WBC_ERR_INVALID_SID:
27 case WBC_ERR_INVALID_PARAM:
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:
35 case WBC_ERR_NSS_ERROR:
36 return PAM_USER_UNKNOWN;
37 case WBC_ERR_AUTH_ERROR:
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:
51 static const char *_pam_error_code_str(int err)
57 return "PAM_OPEN_ERR";
59 return "PAM_SYMBOL_ERR";
61 return "PAM_SERVICE_ERR";
63 return "PAM_SYSTEM_ERR";
67 return "PAM_PERM_DENIED";
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";
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";
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";
89 return "PAM_CRED_ERR";
90 case PAM_NO_MODULE_DATA:
91 return "PAM_NO_MODULE_DATA";
93 return "PAM_CONV_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";
103 return "PAM_TRY_AGAIN";
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";
116 return "PAM_BAD_ITEM";
118 #ifdef PAM_CONV_AGAIN
120 return "PAM_CONV_AGAIN";
122 #ifdef PAM_INCOMPLETE
124 return "PAM_INCOMPLETE";
131 #define _PAM_LOG_FUNCTION_ENTER(function, ctx) \
133 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] ENTER: " \
134 function " (flags: 0x%04x)", ctx->pamh, ctx->flags); \
135 _pam_log_state(ctx); \
138 #define _PAM_LOG_FUNCTION_LEAVE(function, ctx, retval) \
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); \
148 #define MAX_PASSWD_TRIES 3
151 static char initialized = 0;
153 static inline void textdomain_init(void);
154 static inline void textdomain_init(void)
157 bindtextdomain(MODULE_NAME, LOCALEDIR);
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,
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,
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,
192 pam_vsyslog(pamh, err, format, args);
195 static void _pam_log_int(const pam_handle_t *pamh,
200 char *format2 = NULL;
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);
212 sprintf(format2, "%s(%s): %s", MODULE_NAME, service, format);
213 vsyslog(err, format2, args);
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, ...)
228 if (_pam_log_is_silent(r->ctrl)) {
232 va_start(args, format);
233 _pam_log_int(r->pamh, err, format, 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, ...)
241 if (_pam_log_is_silent(ctrl)) {
245 va_start(args, format);
246 _pam_log_int(pamh, err, format, args);
250 static bool _pam_log_is_debug_enabled(int ctrl)
256 if (_pam_log_is_silent(ctrl)) {
260 if (!(ctrl & WINBIND_DEBUG_ARG)) {
267 static bool _pam_log_is_debug_state_enabled(int ctrl)
269 if (!(ctrl & WINBIND_DEBUG_STATE)) {
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, ...)
281 if (!_pam_log_is_debug_enabled(r->ctrl)) {
285 va_start(args, format);
286 _pam_log_int(r->pamh, err, format, 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, ...)
294 if (!_pam_log_is_debug_enabled(ctrl)) {
298 va_start(args, format);
299 _pam_log_int(pamh, err, format, args);
303 static void _pam_log_state_datum(struct pwb_context *ctx,
308 const void *data = NULL;
309 if (item_type != 0) {
310 pam_get_item(ctx->pamh, item_type, &data);
312 pam_get_data(ctx->pamh, key, &data);
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,
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
344 #define _LOG_PASSWORD_AS_STRING 0
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)) {
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);
369 #ifdef PAM_REPOSITORY
370 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_REPOSITORY);
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,
389 dictionary **result_d)
392 const char *config_file = NULL;
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;
409 if (config_file == NULL) {
410 config_file = PAM_WINBIND_CONFIG_FILE;
413 d = iniparser_load(discard_const_p(char, config_file));
415 goto config_from_pam;
418 if (iniparser_getboolean(d, discard_const_p(char, "global:debug"), false)) {
419 ctrl |= WINBIND_DEBUG_ARG;
422 if (iniparser_getboolean(d, discard_const_p(char, "global:debug_state"), false)) {
423 ctrl |= WINBIND_DEBUG_STATE;
426 if (iniparser_getboolean(d, discard_const_p(char, "global:cached_login"), false)) {
427 ctrl |= WINBIND_CACHED_LOGIN;
430 if (iniparser_getboolean(d, discard_const_p(char, "global:krb5_auth"), false)) {
431 ctrl |= WINBIND_KRB5_AUTH;
434 if (iniparser_getboolean(d, discard_const_p(char, "global:silent"), false)) {
435 ctrl |= WINBIND_SILENT;
438 if (iniparser_getstr(d, discard_const_p(char, "global:krb5_ccache_type")) != NULL) {
439 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
442 if ((iniparser_getstr(d, discard_const_p(char, "global:require-membership-of"))
444 (iniparser_getstr(d, discard_const_p(char, "global:require_membership_of"))
446 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
449 if (iniparser_getboolean(d, discard_const_p(char, "global:try_first_pass"), false)) {
450 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
453 if (iniparser_getint(d, discard_const_p(char, "global:warn_pwd_expire"), 0)) {
454 ctrl |= WINBIND_WARN_PWD_EXPIRE;
457 if (iniparser_getboolean(d, discard_const_p(char, "global:mkhomedir"), false)) {
458 ctrl |= WINBIND_MKHOMEDIR;
462 /* step through arguments */
463 for (i=argc,v=argv; i-- > 0; ++v) {
465 /* generic options */
466 if (!strcmp(*v,"debug"))
467 ctrl |= WINBIND_DEBUG_ARG;
468 else if (!strcasecmp(*v, "debug_state"))
469 ctrl |= WINBIND_DEBUG_STATE;
470 else if (!strcasecmp(*v, "silent"))
471 ctrl |= WINBIND_SILENT;
472 else if (!strcasecmp(*v, "use_authtok"))
473 ctrl |= WINBIND_USE_AUTHTOK_ARG;
474 else if (!strcasecmp(*v, "use_first_pass"))
475 ctrl |= WINBIND_USE_FIRST_PASS_ARG;
476 else if (!strcasecmp(*v, "try_first_pass"))
477 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
478 else if (!strcasecmp(*v, "unknown_ok"))
479 ctrl |= WINBIND_UNKNOWN_OK_ARG;
480 else if (!strncasecmp(*v, "require_membership_of",
481 strlen("require_membership_of")))
482 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
483 else if (!strncasecmp(*v, "require-membership-of",
484 strlen("require-membership-of")))
485 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
486 else if (!strcasecmp(*v, "krb5_auth"))
487 ctrl |= WINBIND_KRB5_AUTH;
488 else if (!strncasecmp(*v, "krb5_ccache_type",
489 strlen("krb5_ccache_type")))
490 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
491 else if (!strcasecmp(*v, "cached_login"))
492 ctrl |= WINBIND_CACHED_LOGIN;
493 else if (!strcasecmp(*v, "mkhomedir"))
494 ctrl |= WINBIND_MKHOMEDIR;
496 __pam_log(pamh, ctrl, LOG_ERR,
497 "pam_parse: unknown option: %s", *v);
507 iniparser_freedict(d);
514 static int _pam_winbind_free_context(struct pwb_context *ctx)
521 iniparser_freedict(ctx->dict);
527 static int _pam_winbind_init_context(pam_handle_t *pamh,
531 struct pwb_context **ctx_p)
533 struct pwb_context *r = NULL;
539 r = talloc_zero(NULL, struct pwb_context);
544 talloc_set_destructor(r, _pam_winbind_free_context);
550 r->ctrl = _pam_parse(pamh, flags, argc, argv, &r->dict);
553 return PAM_SYSTEM_ERR;
561 static void _pam_winbind_cleanup_func(pam_handle_t *pamh,
565 int ctrl = _pam_parse(pamh, 0, 0, NULL, NULL);
566 if (_pam_log_is_debug_state_enabled(ctrl)) {
567 __pam_log_debug(pamh, ctrl, LOG_DEBUG,
568 "[pamh: %p] CLEAN: cleaning up PAM data %p "
569 "(error_status = %d)", pamh, data,
576 static const struct ntstatus_errors {
577 const char *ntstatus_string;
578 const char *error_string;
579 } ntstatus_errors[] = {
582 {"NT_STATUS_BACKUP_CONTROLLER",
583 N_("No primary Domain Controler available")},
584 {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
585 N_("No domain controllers found")},
586 {"NT_STATUS_NO_LOGON_SERVERS",
587 N_("No logon servers")},
588 {"NT_STATUS_PWD_TOO_SHORT",
589 N_("Password too short")},
590 {"NT_STATUS_PWD_TOO_RECENT",
591 N_("The password of this user is too recent to change")},
592 {"NT_STATUS_PWD_HISTORY_CONFLICT",
593 N_("Password is already in password history")},
594 {"NT_STATUS_PASSWORD_EXPIRED",
595 N_("Your password has expired")},
596 {"NT_STATUS_PASSWORD_MUST_CHANGE",
597 N_("You need to change your password now")},
598 {"NT_STATUS_INVALID_WORKSTATION",
599 N_("You are not allowed to logon from this workstation")},
600 {"NT_STATUS_INVALID_LOGON_HOURS",
601 N_("You are not allowed to logon at this time")},
602 {"NT_STATUS_ACCOUNT_EXPIRED",
603 N_("Your account has expired. "
604 "Please contact your System administrator")}, /* SCNR */
605 {"NT_STATUS_ACCOUNT_DISABLED",
606 N_("Your account is disabled. "
607 "Please contact your System administrator")}, /* SCNR */
608 {"NT_STATUS_ACCOUNT_LOCKED_OUT",
609 N_("Your account has been locked. "
610 "Please contact your System administrator")}, /* SCNR */
611 {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
612 N_("Invalid Trust Account")},
613 {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
614 N_("Invalid Trust Account")},
615 {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
616 N_("Invalid Trust Account")},
617 {"NT_STATUS_ACCESS_DENIED",
618 N_("Access is denied")},
622 static const char *_get_ntstatus_error_string(const char *nt_status_string)
625 for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
626 if (!strcasecmp(ntstatus_errors[i].ntstatus_string,
628 return _(ntstatus_errors[i].error_string);
634 /* --- authentication management functions --- */
636 /* Attempt a conversation */
638 static int converse(const pam_handle_t *pamh,
640 struct pam_message **message,
641 struct pam_response **response)
644 struct pam_conv *conv;
646 retval = _pam_get_item(pamh, PAM_CONV, &conv);
647 if (retval == PAM_SUCCESS) {
648 retval = conv->conv(nargs,
649 (const struct pam_message **)message,
650 response, conv->appdata_ptr);
653 return retval; /* propagate error status */
657 static int _make_remark(struct pwb_context *ctx,
661 int retval = PAM_SUCCESS;
663 struct pam_message *pmsg[1], msg[1];
664 struct pam_response *resp;
666 if (ctx->flags & WINBIND_SILENT) {
671 msg[0].msg = discard_const_p(char, text);
672 msg[0].msg_style = type;
675 retval = converse(ctx->pamh, 1, pmsg, &resp);
678 _pam_drop_reply(resp, 1);
683 static int _make_remark_v(struct pwb_context *ctx,
691 ret = vasprintf(&var, format, args);
693 _pam_log(ctx, LOG_ERR, "memory allocation failure");
697 ret = _make_remark(ctx, type, var);
702 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
703 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...)
708 va_start(args, format);
709 ret = _make_remark_v(ctx, type, format, args);
714 static int pam_winbind_request_log(struct pwb_context *ctx,
721 /* incorrect password */
722 _pam_log(ctx, LOG_WARNING, "user '%s' denied access "
723 "(incorrect password or invalid membership)", user);
725 case PAM_ACCT_EXPIRED:
726 /* account expired */
727 _pam_log(ctx, LOG_WARNING, "user '%s' account expired",
730 case PAM_AUTHTOK_EXPIRED:
731 /* password expired */
732 _pam_log(ctx, LOG_WARNING, "user '%s' password expired",
735 case PAM_NEW_AUTHTOK_REQD:
736 /* new password required */
737 _pam_log(ctx, LOG_WARNING, "user '%s' new password "
740 case PAM_USER_UNKNOWN:
741 /* the user does not exist */
742 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
744 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
749 /* Otherwise, the authentication looked good */
750 if (strcmp(fn, "wbcLogonUser") == 0) {
751 _pam_log(ctx, LOG_NOTICE,
752 "user '%s' granted access", user);
754 _pam_log(ctx, LOG_NOTICE,
755 "user '%s' OK", user);
759 /* we don't know anything about this return value */
760 _pam_log(ctx, LOG_ERR,
761 "internal module error (retval = %s(%d), user = '%s')",
762 _pam_error_code_str(retval), retval, user);
767 static int wbc_auth_error_to_pam_error(struct pwb_context *ctx,
768 struct wbcAuthErrorInfo *e,
770 const char *username,
773 int ret = PAM_AUTH_ERR;
775 if (WBC_ERROR_IS_OK(status)) {
776 _pam_log_debug(ctx, LOG_DEBUG, "request %s succeeded",
779 return pam_winbind_request_log(ctx, ret, username, fn);
783 if (e->pam_error != PAM_SUCCESS) {
784 _pam_log(ctx, LOG_ERR,
785 "request %s failed: %s, "
786 "PAM error: %s (%d), NTSTATUS: %s, "
787 "Error message was: %s",
789 wbcErrorString(status),
790 _pam_error_code_str(e->pam_error),
795 return pam_winbind_request_log(ctx, ret, username, fn);
798 _pam_log(ctx, LOG_ERR, "request %s failed, but PAM error 0!", fn);
800 ret = PAM_SERVICE_ERR;
801 return pam_winbind_request_log(ctx, ret, username, fn);
804 ret = wbc_error_to_pam_error(status);
805 return pam_winbind_request_log(ctx, ret, username, fn);
808 #if defined(HAVE_PAM_RADIO_TYPE)
809 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
811 struct pam_message msg, *pmsg;
812 struct pam_response *resp = NULL;
816 prompt = _("Do you want to change your password now?");
818 msg.msg_style = PAM_RADIO_TYPE;
820 ret = converse(ctx->pamh, 1, &pmsg, &resp);
822 if (ret == PAM_SUCCESS) {
823 _pam_log(ctx, LOG_CRIT, "pam_winbind: system error!\n");
827 if (ret != PAM_SUCCESS) {
830 _pam_log(ctx, LOG_CRIT, "Received [%s] reply from application.\n", resp->resp);
832 if (strcasecmp(resp->resp, "yes") == 0) {
836 _pam_drop_reply(resp, 1);
840 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
847 * send a password expiry message if required
849 * @param ctx PAM winbind context.
850 * @param next_change expected (calculated) next expiry date.
851 * @param already_expired pointer to a boolean to indicate if the password is
854 * @return boolean Returns true if message has been sent, false if not.
857 static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
861 bool *already_expired,
865 struct tm tm_now, tm_next_change;
869 if (already_expired) {
870 *already_expired = false;
877 if (next_change <= now) {
878 PAM_WB_REMARK_DIRECT(ctx, "NT_STATUS_PASSWORD_EXPIRED");
879 if (already_expired) {
880 *already_expired = true;
885 if ((next_change < 0) ||
886 (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
890 if ((localtime_r(&now, &tm_now) == NULL) ||
891 (localtime_r(&next_change, &tm_next_change) == NULL)) {
895 days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) -
896 (tm_now.tm_yday+tm_now.tm_year*365);
899 ret = _make_remark(ctx, PAM_TEXT_INFO,
900 _("Your password expires today.\n"));
903 * If change_pwd and already_expired is null.
904 * We are just sending a notification message.
905 * We don't expect any response in this case.
908 if (!change_pwd && !already_expired) {
913 * successfully sent the warning message.
914 * Give the user a chance to change pwd.
916 if (ret == PAM_SUCCESS) {
918 retval = _pam_winbind_change_pwd(ctx);
927 if (days > 0 && days < warn_pwd_expire) {
929 ret = _make_remark_format(ctx, PAM_TEXT_INFO,
930 _("Your password will expire in %d %s.\n"),
931 days, (days > 1) ? _("days"):_("day"));
933 * If change_pwd and already_expired is null.
934 * We are just sending a notification message.
935 * We don't expect any response in this case.
938 if (!change_pwd && !already_expired) {
943 * successfully sent the warning message.
944 * Give the user a chance to change pwd.
946 if (ret == PAM_SUCCESS) {
948 retval = _pam_winbind_change_pwd(ctx);
961 * Send a warning if the password expires in the near future
963 * @param ctx PAM winbind context.
964 * @param response The full authentication response structure.
965 * @param already_expired boolean, is the pwd already expired?
970 static void _pam_warn_password_expiry(struct pwb_context *ctx,
971 const struct wbcAuthUserInfo *info,
972 const struct wbcUserPasswordPolicyInfo *policy,
974 bool *already_expired,
977 time_t now = time(NULL);
978 time_t next_change = 0;
980 if (!info || !policy) {
984 if (already_expired) {
985 *already_expired = false;
992 /* accounts with WBC_ACB_PWNOEXP set never receive a warning */
993 if (info->acct_flags & WBC_ACB_PWNOEXP) {
997 /* no point in sending a warning if this is a grace logon */
998 if (PAM_WB_GRACE_LOGON(info->user_flags)) {
1002 /* check if the info3 must change timestamp has been set */
1003 next_change = info->pass_must_change_time;
1005 if (_pam_send_password_expiry_message(ctx, next_change, now,
1012 /* now check for the global password policy */
1013 /* good catch from Ralf Haferkamp: an expiry of "never" is translated
1015 if ((policy->expire == (int64_t)-1) ||
1016 (policy->expire == 0)) {
1020 next_change = info->pass_last_set_time + policy->expire;
1022 if (_pam_send_password_expiry_message(ctx, next_change, now,
1029 /* no warning sent */
1032 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
1035 * Append a string, making sure not to overflow and to always return a
1036 * NULL-terminated string.
1038 * @param dest Destination string buffer (must already be NULL-terminated).
1039 * @param src Source string buffer.
1040 * @param dest_buffer_size Size of dest buffer in bytes.
1042 * @return false if dest buffer is not big enough (no bytes copied), true on
1046 static bool safe_append_string(char *dest,
1048 int dest_buffer_size)
1050 int dest_length = strlen(dest);
1051 int src_length = strlen(src);
1053 if (dest_length + src_length + 1 > dest_buffer_size) {
1057 memcpy(dest + dest_length, src, src_length + 1);
1062 * Convert a names into a SID string, appending it to a buffer.
1064 * @param ctx PAM winbind context.
1065 * @param user User in PAM request.
1066 * @param name Name to convert.
1067 * @param sid_list_buffer Where to append the string sid.
1068 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1070 * @return false on failure, true on success.
1072 static bool winbind_name_to_sid_string(struct pwb_context *ctx,
1075 char *sid_list_buffer,
1076 int sid_list_buffer_size)
1078 char sid_string[WBC_SID_STRING_BUFLEN];
1081 if (IS_SID_STRING(name)) {
1082 strlcpy(sid_string, name, sizeof(sid_string));
1085 struct wbcDomainSid sid;
1086 enum wbcSidType type;
1088 _pam_log_debug(ctx, LOG_DEBUG,
1089 "no sid given, looking up: %s\n", name);
1091 wbc_status = wbcLookupName("", name, &sid, &type);
1092 if (!WBC_ERROR_IS_OK(wbc_status)) {
1093 _pam_log(ctx, LOG_INFO,
1094 "could not lookup name: %s\n", name);
1098 wbcSidToStringBuf(&sid, sid_string, sizeof(sid_string));
1101 if (!safe_append_string(sid_list_buffer, sid_string,
1102 sid_list_buffer_size)) {
1109 * Convert a list of names into a list of sids.
1111 * @param ctx PAM winbind context.
1112 * @param user User in PAM request.
1113 * @param name_list List of names or string sids, separated by commas.
1114 * @param sid_list_buffer Where to put the list of string sids.
1115 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1117 * @return false on failure, true on success.
1119 static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
1121 const char *name_list,
1122 char *sid_list_buffer,
1123 int sid_list_buffer_size)
1125 bool result = false;
1126 char *current_name = NULL;
1127 const char *search_location;
1131 if (sid_list_buffer_size > 0) {
1132 sid_list_buffer[0] = 0;
1135 search_location = name_list;
1136 while ((comma = strchr(search_location, ',')) != NULL) {
1137 current_name = strndup(search_location,
1138 comma - search_location);
1139 if (NULL == current_name) {
1143 if (!winbind_name_to_sid_string(ctx, user,
1146 sid_list_buffer_size)) {
1148 * If one group name failed, we must not fail
1149 * the authentication totally, continue with
1150 * the following group names. If user belongs to
1151 * one of the valid groups, we must allow it
1155 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1156 "check if group %s is valid group.", current_name,
1158 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1159 "to sid, please contact your administrator to see "
1160 "if group %s is valid."), current_name, current_name);
1161 SAFE_FREE(current_name);
1162 search_location = comma + 1;
1166 SAFE_FREE(current_name);
1168 if (!safe_append_string(sid_list_buffer, ",",
1169 sid_list_buffer_size)) {
1173 search_location = comma + 1;
1176 if (!winbind_name_to_sid_string(ctx, user, search_location,
1178 sid_list_buffer_size)) {
1179 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1180 "check if group %s is valid group.", search_location,
1182 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1183 "to sid, please contact your administrator to see "
1184 "if group %s is valid."), search_location, search_location);
1186 * The lookup of the last name failed..
1187 * It results in require_member_of_sid ends with ','
1188 * It is malformated parameter here, overwrite the last ','.
1190 len = strlen(sid_list_buffer);
1191 if ((len != 0) && (sid_list_buffer[len - 1] == ',')) {
1192 sid_list_buffer[len - 1] = '\0';
1199 SAFE_FREE(current_name);
1204 * put krb5ccname variable into environment
1206 * @param ctx PAM winbind context.
1207 * @param krb5ccname env variable retrieved from winbindd.
1212 static void _pam_setup_krb5_env(struct pwb_context *ctx,
1213 struct wbcLogonUserInfo *info)
1218 const char *krb5ccname = NULL;
1220 if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
1228 for (i=0; i < info->num_blobs; i++) {
1229 if (strcasecmp(info->blobs[i].name, "krb5ccname") == 0) {
1230 krb5ccname = (const char *)info->blobs[i].blob.data;
1235 if (!krb5ccname || (strlen(krb5ccname) == 0)) {
1239 _pam_log_debug(ctx, LOG_DEBUG,
1240 "request returned KRB5CCNAME: %s", krb5ccname);
1242 if (asprintf(&var, "KRB5CCNAME=%s", krb5ccname) == -1) {
1246 ret = pam_putenv(ctx->pamh, var);
1248 _pam_log(ctx, LOG_ERR,
1249 "failed to set KRB5CCNAME to %s: %s",
1250 var, pam_strerror(ctx->pamh, ret));
1256 * Copy unix username if available (further processed in PAM).
1258 * @param ctx PAM winbind context
1259 * @param user_ret A pointer that holds a pointer to a string
1260 * @param unix_username A username
1265 static void _pam_setup_unix_username(struct pwb_context *ctx,
1267 struct wbcLogonUserInfo *info)
1269 const char *unix_username = NULL;
1272 if (!user_ret || !info) {
1276 for (i=0; i < info->num_blobs; i++) {
1277 if (strcasecmp(info->blobs[i].name, "unix_username") == 0) {
1278 unix_username = (const char *)info->blobs[i].blob.data;
1283 if (!unix_username || !unix_username[0]) {
1287 *user_ret = strdup(unix_username);
1291 * Set string into the PAM stack.
1293 * @param ctx PAM winbind context.
1294 * @param data_name Key name for pam_set_data.
1295 * @param value String value.
1300 static void _pam_set_data_string(struct pwb_context *ctx,
1301 const char *data_name,
1306 if (!data_name || !value || (strlen(data_name) == 0) ||
1307 (strlen(value) == 0)) {
1311 ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
1312 _pam_winbind_cleanup_func);
1314 _pam_log_debug(ctx, LOG_DEBUG,
1315 "Could not set data %s: %s\n",
1316 data_name, pam_strerror(ctx->pamh, ret));
1321 * Set info3 strings into the PAM stack.
1323 * @param ctx PAM winbind context.
1324 * @param data_name Key name for pam_set_data.
1325 * @param value String value.
1330 static void _pam_set_data_info3(struct pwb_context *ctx,
1331 const struct wbcAuthUserInfo *info)
1333 _pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
1334 info->home_directory);
1335 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
1336 info->logon_script);
1337 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
1338 info->logon_server);
1339 _pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
1340 info->profile_path);
1344 * Free info3 strings in the PAM stack.
1346 * @param pamh PAM handle
1351 static void _pam_free_data_info3(pam_handle_t *pamh)
1353 pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1354 pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1355 pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1356 pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1360 * Send PAM_ERROR_MSG for cached or grace logons.
1362 * @param ctx PAM winbind context.
1363 * @param username User in PAM request.
1364 * @param info3_user_flgs Info3 flags containing logon type bits.
1369 static void _pam_warn_logon_type(struct pwb_context *ctx,
1370 const char *username,
1371 uint32_t info3_user_flgs)
1373 /* inform about logon type */
1374 if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1376 _make_remark(ctx, PAM_ERROR_MSG,
1378 "Please change your password as soon you're "
1380 _pam_log_debug(ctx, LOG_DEBUG,
1381 "User %s logged on using grace logon\n",
1384 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1386 _make_remark(ctx, PAM_ERROR_MSG,
1387 _("Domain Controller unreachable, "
1388 "using cached credentials instead. "
1389 "Network resources may be unavailable"));
1390 _pam_log_debug(ctx, LOG_DEBUG,
1391 "User %s logged on using cached credentials\n",
1397 * Send PAM_ERROR_MSG for krb5 errors.
1399 * @param ctx PAM winbind context.
1400 * @param username User in PAM request.
1401 * @param info3_user_flgs Info3 flags containing logon type bits.
1406 static void _pam_warn_krb5_failure(struct pwb_context *ctx,
1407 const char *username,
1408 uint32_t info3_user_flgs)
1410 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1411 _make_remark(ctx, PAM_ERROR_MSG,
1412 _("Failed to establish your Kerberos Ticket cache "
1413 "due time differences\n"
1414 "with the domain controller. "
1415 "Please verify the system time.\n"));
1416 _pam_log_debug(ctx, LOG_DEBUG,
1417 "User %s: Clock skew when getting Krb5 TGT\n",
1422 static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
1423 const struct wbcAuthErrorInfo *e,
1424 const char *nt_status_string,
1427 const char *ntstatus = NULL;
1428 const char *error_string = NULL;
1430 if (!e || !pam_err) {
1434 ntstatus = e->nt_string;
1439 if (strcasecmp(ntstatus, nt_status_string) == 0) {
1441 error_string = _get_ntstatus_error_string(nt_status_string);
1443 _make_remark(ctx, PAM_ERROR_MSG, error_string);
1444 *pam_err = e->pam_error;
1448 if (e->display_string) {
1449 _make_remark(ctx, PAM_ERROR_MSG, _(e->display_string));
1450 *pam_err = e->pam_error;
1454 _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
1455 *pam_err = e->pam_error;
1464 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1466 * @param i The wbcUserPasswordPolicyInfo struct.
1468 * @return string (caller needs to talloc_free).
1471 static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
1472 struct wbcUserPasswordPolicyInfo *i)
1480 str = talloc_asprintf(ctx, _("Your password "));
1485 if (i->min_length_password > 0) {
1486 str = talloc_asprintf_append(str,
1487 _("must be at least %d characters; "),
1488 i->min_length_password);
1494 if (i->password_history > 0) {
1495 str = talloc_asprintf_append(str,
1496 _("cannot repeat any of your previous %d "
1498 i->password_history);
1504 if (i->password_properties & WBC_DOMAIN_PASSWORD_COMPLEX) {
1505 str = talloc_asprintf_append(str,
1506 _("must contain capitals, numerals "
1508 "and cannot contain your account "
1515 str = talloc_asprintf_append(str,
1516 _("Please type a different password. "
1517 "Type a password which meets these requirements in "
1518 "both text boxes."));
1530 static int _pam_create_homedir(struct pwb_context *ctx,
1531 const char *dirname,
1536 if (stat(dirname, &sbuf) == 0) {
1540 if (mkdir(dirname, mode) != 0) {
1542 _make_remark_format(ctx, PAM_TEXT_INFO,
1543 _("Creating directory: %s failed: %s"),
1544 dirname, strerror(errno));
1545 _pam_log(ctx, LOG_ERR, "could not create dir: %s (%s)",
1546 dirname, strerror(errno));
1547 return PAM_PERM_DENIED;
1553 static int _pam_chown_homedir(struct pwb_context *ctx,
1554 const char *dirname,
1558 if (chown(dirname, uid, gid) != 0) {
1559 _pam_log(ctx, LOG_ERR, "failed to chown user homedir: %s (%s)",
1560 dirname, strerror(errno));
1561 return PAM_PERM_DENIED;
1567 static int _pam_mkhomedir(struct pwb_context *ctx)
1569 struct passwd *pwd = NULL;
1571 char *create_dir = NULL;
1572 char *user_dir = NULL;
1574 const char *username;
1576 char *safe_ptr = NULL;
1579 /* Get the username */
1580 ret = pam_get_user(ctx->pamh, &username, NULL);
1581 if ((ret != PAM_SUCCESS) || (!username)) {
1582 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1583 return PAM_SERVICE_ERR;
1586 pwd = getpwnam(username);
1588 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1589 return PAM_USER_UNKNOWN;
1591 _pam_log_debug(ctx, LOG_DEBUG, "homedir is: %s", pwd->pw_dir);
1593 ret = _pam_create_homedir(ctx, pwd->pw_dir, 0700);
1594 if (ret == PAM_SUCCESS) {
1595 ret = _pam_chown_homedir(ctx, pwd->pw_dir,
1600 if (ret == PAM_SUCCESS) {
1604 /* maybe we need to create parent dirs */
1605 create_dir = talloc_strdup(ctx, "/");
1610 /* find final directory */
1611 user_dir = strrchr(pwd->pw_dir, '/');
1617 _pam_log(ctx, LOG_DEBUG, "final directory: %s", user_dir);
1621 while ((token = strtok_r(p, "/", &safe_ptr)) != NULL) {
1627 _pam_log_debug(ctx, LOG_DEBUG, "token is %s", token);
1629 create_dir = talloc_asprintf_append(create_dir, "%s/", token);
1633 _pam_log_debug(ctx, LOG_DEBUG, "current_dir is %s", create_dir);
1635 if (strcmp(token, user_dir) == 0) {
1636 _pam_log_debug(ctx, LOG_DEBUG, "assuming last directory: %s", token);
1640 ret = _pam_create_homedir(ctx, create_dir, mode);
1646 return _pam_chown_homedir(ctx, create_dir,
1651 /* talk to winbindd */
1652 static int winbind_auth_request(struct pwb_context *ctx,
1657 const int warn_pwd_expire,
1658 struct wbcAuthErrorInfo **p_error,
1659 struct wbcLogonUserInfo **p_info,
1660 struct wbcUserPasswordPolicyInfo **p_policy,
1661 time_t *pwd_last_set,
1666 struct wbcLogonUserParams logon;
1667 char membership_of[1024];
1668 uid_t user_uid = -1;
1669 uint32_t flags = WBFLAG_PAM_INFO3_TEXT |
1670 WBFLAG_PAM_GET_PWD_POLICY;
1672 struct wbcLogonUserInfo *info = NULL;
1673 struct wbcAuthUserInfo *user_info = NULL;
1674 struct wbcAuthErrorInfo *error = NULL;
1675 struct wbcUserPasswordPolicyInfo *policy = NULL;
1677 int ret = PAM_AUTH_ERR;
1679 const char *codes[] = {
1680 "NT_STATUS_PASSWORD_EXPIRED",
1681 "NT_STATUS_PASSWORD_MUST_CHANGE",
1682 "NT_STATUS_INVALID_WORKSTATION",
1683 "NT_STATUS_INVALID_LOGON_HOURS",
1684 "NT_STATUS_ACCOUNT_EXPIRED",
1685 "NT_STATUS_ACCOUNT_DISABLED",
1686 "NT_STATUS_ACCOUNT_LOCKED_OUT",
1687 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1688 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1689 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1690 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1691 "NT_STATUS_NO_LOGON_SERVERS",
1692 "NT_STATUS_WRONG_PASSWORD",
1693 "NT_STATUS_ACCESS_DENIED"
1700 /* Krb5 auth always has to go against the KDC of the user's realm */
1702 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1703 flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
1706 if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1707 struct passwd *pwd = NULL;
1709 pwd = getpwnam(user);
1711 return PAM_USER_UNKNOWN;
1713 user_uid = pwd->pw_uid;
1716 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1718 _pam_log_debug(ctx, LOG_DEBUG,
1719 "enabling krb5 login flag\n");
1721 flags |= WBFLAG_PAM_KRB5 |
1722 WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1725 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1726 _pam_log_debug(ctx, LOG_DEBUG,
1727 "enabling cached login flag\n");
1728 flags |= WBFLAG_PAM_CACHED_LOGIN;
1733 flags |= WBFLAG_PAM_UNIX_NAME;
1736 if (cctype != NULL) {
1737 _pam_log_debug(ctx, LOG_DEBUG,
1738 "enabling request for a %s krb5 ccache\n",
1742 if (member != NULL) {
1744 ZERO_STRUCT(membership_of);
1746 if (!winbind_name_list_to_sid_string_list(ctx, user, member,
1748 sizeof(membership_of))) {
1749 _pam_log_debug(ctx, LOG_ERR,
1750 "failed to serialize membership of sid "
1751 "\"%s\"\n", member);
1752 return PAM_AUTH_ERR;
1758 logon.username = user;
1759 logon.password = pass;
1762 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1766 discard_const_p(uint8_t, cctype),
1768 if (!WBC_ERROR_IS_OK(wbc_status)) {
1773 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1779 if (!WBC_ERROR_IS_OK(wbc_status)) {
1783 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1787 (uint8_t *)&user_uid,
1789 if (!WBC_ERROR_IS_OK(wbc_status)) {
1794 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1798 (uint8_t *)membership_of,
1799 sizeof(membership_of));
1800 if (!WBC_ERROR_IS_OK(wbc_status)) {
1805 wbc_status = wbcLogonUser(&logon, &info, &error, &policy);
1806 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1807 user, "wbcLogonUser");
1808 wbcFreeMemory(logon.blobs);
1811 if (info && info->info) {
1812 user_info = info->info;
1815 if (pwd_last_set && user_info) {
1816 *pwd_last_set = user_info->pass_last_set_time;
1819 if (p_info && info) {
1823 if (p_policy && policy) {
1827 if (p_error && error) {
1828 /* We want to process the error in the caller. */
1833 for (i=0; i<ARRAY_SIZE(codes); i++) {
1835 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1841 if ((ret == PAM_SUCCESS) && user_info && policy && info) {
1843 bool already_expired = false;
1844 bool change_pwd = false;
1846 /* warn a user if the password is about to expire soon */
1847 _pam_warn_password_expiry(ctx, user_info, policy,
1852 if (already_expired == true) {
1854 SMB_TIME_T last_set = user_info->pass_last_set_time;
1856 _pam_log_debug(ctx, LOG_DEBUG,
1857 "Password has expired "
1858 "(Password was last set: %lld, "
1859 "the policy says it should expire here "
1860 "%lld (now it's: %ld))\n",
1861 (long long int)last_set,
1862 (long long int)last_set +
1866 return PAM_AUTHTOK_EXPIRED;
1870 ret = PAM_NEW_AUTHTOK_REQD;
1874 /* inform about logon type */
1875 _pam_warn_logon_type(ctx, user, user_info->user_flags);
1877 /* inform about krb5 failures */
1878 _pam_warn_krb5_failure(ctx, user, user_info->user_flags);
1880 /* set some info3 info for other modules in the stack */
1881 _pam_set_data_info3(ctx, user_info);
1883 /* put krb5ccname into env */
1884 _pam_setup_krb5_env(ctx, info);
1886 /* If winbindd returned a username, return the pointer to it
1888 _pam_setup_unix_username(ctx, user_ret, info);
1892 wbcFreeMemory(logon.blobs);
1893 if (info && info->blobs && !p_info) {
1894 wbcFreeMemory(info->blobs);
1896 if (error && !p_error) {
1897 wbcFreeMemory(error);
1899 if (info && !p_info) {
1900 wbcFreeMemory(info);
1902 if (policy && !p_policy) {
1903 wbcFreeMemory(policy);
1909 /* talk to winbindd */
1910 static int winbind_chauthtok_request(struct pwb_context *ctx,
1912 const char *oldpass,
1913 const char *newpass,
1914 time_t pwd_last_set)
1917 struct wbcChangePasswordParams params;
1918 struct wbcAuthErrorInfo *error = NULL;
1919 struct wbcUserPasswordPolicyInfo *policy = NULL;
1920 enum wbcPasswordChangeRejectReason reject_reason = -1;
1924 const char *codes[] = {
1925 "NT_STATUS_BACKUP_CONTROLLER",
1926 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1927 "NT_STATUS_NO_LOGON_SERVERS",
1928 "NT_STATUS_ACCESS_DENIED",
1929 "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1930 "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1931 "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1933 int ret = PAM_AUTH_ERR;
1935 ZERO_STRUCT(params);
1937 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1938 flags |= WBFLAG_PAM_KRB5 |
1939 WBFLAG_PAM_CONTACT_TRUSTDOM;
1942 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1943 flags |= WBFLAG_PAM_CACHED_LOGIN;
1946 params.account_name = user;
1947 params.level = WBC_AUTH_USER_LEVEL_PLAIN;
1948 params.old_password.plaintext = oldpass;
1949 params.new_password.plaintext = newpass;
1950 params.flags = flags;
1952 wbc_status = wbcChangeUserPasswordEx(¶ms, &error, &reject_reason, &policy);
1953 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1954 user, "wbcChangeUserPasswordEx");
1956 if (WBC_ERROR_IS_OK(wbc_status)) {
1957 _pam_log(ctx, LOG_NOTICE,
1958 "user '%s' password changed", user);
1963 wbcFreeMemory(policy);
1967 for (i=0; i<ARRAY_SIZE(codes); i++) {
1969 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1975 if (!strcasecmp(error->nt_string,
1976 "NT_STATUS_PASSWORD_RESTRICTION")) {
1978 char *pwd_restriction_string = NULL;
1979 SMB_TIME_T min_pwd_age = 0;
1982 min_pwd_age = policy->min_passwordage;
1985 /* FIXME: avoid to send multiple PAM messages after another */
1986 switch (reject_reason) {
1989 case WBC_PWD_CHANGE_NO_ERROR:
1990 if ((min_pwd_age > 0) &&
1991 (pwd_last_set + min_pwd_age > time(NULL))) {
1992 PAM_WB_REMARK_DIRECT(ctx,
1993 "NT_STATUS_PWD_TOO_RECENT");
1996 case WBC_PWD_CHANGE_PASSWORD_TOO_SHORT:
1997 PAM_WB_REMARK_DIRECT(ctx,
1998 "NT_STATUS_PWD_TOO_SHORT");
2000 case WBC_PWD_CHANGE_PWD_IN_HISTORY:
2001 PAM_WB_REMARK_DIRECT(ctx,
2002 "NT_STATUS_PWD_HISTORY_CONFLICT");
2004 case WBC_PWD_CHANGE_NOT_COMPLEX:
2005 _make_remark(ctx, PAM_ERROR_MSG,
2006 _("Password does not meet "
2007 "complexity requirements"));
2010 _pam_log_debug(ctx, LOG_DEBUG,
2011 "unknown password change "
2012 "reject reason: %d",
2017 pwd_restriction_string =
2018 _pam_compose_pwd_restriction_string(ctx, policy);
2019 if (pwd_restriction_string) {
2020 _make_remark(ctx, PAM_ERROR_MSG,
2021 pwd_restriction_string);
2022 TALLOC_FREE(pwd_restriction_string);
2026 wbcFreeMemory(error);
2027 wbcFreeMemory(policy);
2033 * Checks if a user has an account
2036 * 1 = User not found
2040 static int valid_user(struct pwb_context *ctx,
2043 /* check not only if the user is available over NSS calls, also make
2044 * sure it's really a winbind user, this is important when stacking PAM
2045 * modules in the 'account' or 'password' facility. */
2048 struct passwd *pwd = NULL;
2049 struct passwd *wb_pwd = NULL;
2051 pwd = getpwnam(user);
2056 wbc_status = wbcGetpwnam(user, &wb_pwd);
2057 wbcFreeMemory(wb_pwd);
2058 if (!WBC_ERROR_IS_OK(wbc_status)) {
2059 _pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
2060 wbcErrorString(wbc_status));
2063 switch (wbc_status) {
2064 case WBC_ERR_UNKNOWN_USER:
2066 case WBC_ERR_SUCCESS:
2074 static char *_pam_delete(register char *xx)
2082 * obtain a password from the user
2085 static int _winbind_read_password(struct pwb_context *ctx,
2087 const char *comment,
2088 const char *prompt1,
2089 const char *prompt2,
2097 _pam_log(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
2100 * make sure nothing inappropriate gets returned
2103 *pass = token = NULL;
2106 * which authentication token are we getting?
2109 if (on(WINBIND__OLD_PASSWORD, ctrl)) {
2110 authtok_flag = PAM_OLDAUTHTOK;
2112 authtok_flag = PAM_AUTHTOK;
2116 * should we obtain the password from a PAM item ?
2119 if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
2120 on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2121 retval = _pam_get_item(ctx->pamh, authtok_flag, &item);
2122 if (retval != PAM_SUCCESS) {
2124 _pam_log(ctx, LOG_ALERT,
2125 "pam_get_item returned error "
2126 "to unix-read-password");
2128 } else if (item != NULL) { /* we have a password! */
2131 _pam_log(ctx, LOG_DEBUG,
2132 "pam_get_item returned a password");
2134 } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2135 return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
2136 } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
2137 && off(WINBIND__OLD_PASSWORD, ctrl)) {
2138 return PAM_AUTHTOK_RECOVER_ERR;
2142 * getting here implies we will have to get the password from the
2147 struct pam_message msg[3], *pmsg[3];
2148 struct pam_response *resp;
2151 /* prepare to converse */
2153 if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
2155 msg[0].msg_style = PAM_TEXT_INFO;
2156 msg[0].msg = discard_const_p(char, comment);
2163 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2164 msg[i++].msg = discard_const_p(char, prompt1);
2167 if (prompt2 != NULL) {
2169 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2170 msg[i++].msg = discard_const_p(char, prompt2);
2173 /* so call the conversation expecting i responses */
2175 retval = converse(ctx->pamh, i, pmsg, &resp);
2177 if (retval == PAM_SUCCESS) {
2178 retval = PAM_AUTHTOK_RECOVER_ERR;
2182 if (retval != PAM_SUCCESS) {
2183 _pam_drop_reply(resp, i);
2187 /* interpret the response */
2189 token = x_strdup(resp[i - replies].resp);
2191 _pam_log(ctx, LOG_NOTICE,
2192 "could not recover "
2193 "authentication token");
2194 retval = PAM_AUTHTOK_RECOVER_ERR;
2199 /* verify that password entered correctly */
2200 if (!resp[i - 1].resp ||
2201 strcmp(token, resp[i - 1].resp)) {
2202 _pam_delete(token); /* mistyped */
2203 retval = PAM_AUTHTOK_RECOVER_ERR;
2204 _make_remark(ctx, PAM_ERROR_MSG,
2210 * tidy up the conversation (resp_retcode) is ignored
2211 * -- what is it for anyway? AGM
2213 _pam_drop_reply(resp, i);
2217 if (retval != PAM_SUCCESS) {
2218 _pam_log_debug(ctx, LOG_DEBUG,
2219 "unable to obtain a password");
2222 /* 'token' is the entered password */
2224 /* we store this password as an item */
2226 retval = pam_set_item(ctx->pamh, authtok_flag, token);
2227 _pam_delete(token); /* clean it up */
2228 if (retval != PAM_SUCCESS ||
2229 (retval = _pam_get_item(ctx->pamh, authtok_flag, &item)) != PAM_SUCCESS) {
2231 _pam_log(ctx, LOG_CRIT, "error manipulating password");
2237 item = NULL; /* break link to password */
2242 static const char *get_conf_item_string(struct pwb_context *ctx,
2247 const char *parm_opt = NULL;
2249 if (!(ctx->ctrl & config_flag)) {
2253 /* let the pam opt take precedence over the pam_winbind.conf option */
2254 for (i=0; i<ctx->argc; i++) {
2256 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2259 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2260 _pam_log(ctx, LOG_INFO,
2261 "no \"=\" delimiter for \"%s\" found\n",
2265 _pam_log_debug(ctx, LOG_INFO,
2266 "PAM config: %s '%s'\n", item, p+1);
2274 key = talloc_asprintf(ctx, "global:%s", item);
2279 parm_opt = iniparser_getstr(ctx->dict, key);
2282 _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
2289 static int get_config_item_int(struct pwb_context *ctx,
2293 int i, parm_opt = -1;
2295 if (!(ctx->ctrl & config_flag)) {
2299 /* let the pam opt take precedence over the pam_winbind.conf option */
2300 for (i = 0; i < ctx->argc; i++) {
2302 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2305 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2306 _pam_log(ctx, LOG_INFO,
2307 "no \"=\" delimiter for \"%s\" found\n",
2311 parm_opt = atoi(p + 1);
2312 _pam_log_debug(ctx, LOG_INFO,
2313 "PAM config: %s '%d'\n",
2322 key = talloc_asprintf(ctx, "global:%s", item);
2327 parm_opt = iniparser_getint(ctx->dict, key, -1);
2330 _pam_log_debug(ctx, LOG_INFO,
2331 "CONFIG file: %s '%d'\n",
2338 static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
2340 return get_conf_item_string(ctx, "krb5_ccache_type",
2341 WINBIND_KRB5_CCACHE_TYPE);
2344 static const char *get_member_from_config(struct pwb_context *ctx)
2346 const char *ret = NULL;
2347 ret = get_conf_item_string(ctx, "require_membership_of",
2348 WINBIND_REQUIRED_MEMBERSHIP);
2352 return get_conf_item_string(ctx, "require-membership-of",
2353 WINBIND_REQUIRED_MEMBERSHIP);
2356 static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
2359 ret = get_config_item_int(ctx, "warn_pwd_expire",
2360 WINBIND_WARN_PWD_EXPIRE);
2361 /* no or broken setting */
2363 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
2369 * Retrieve the winbind separator.
2371 * @param ctx PAM winbind context.
2373 * @return string separator character. NULL on failure.
2376 static char winbind_get_separator(struct pwb_context *ctx)
2379 static struct wbcInterfaceDetails *details = NULL;
2381 wbc_status = wbcInterfaceDetails(&details);
2382 if (!WBC_ERROR_IS_OK(wbc_status)) {
2383 _pam_log(ctx, LOG_ERR,
2384 "Could not retrieve winbind interface details: %s",
2385 wbcErrorString(wbc_status));
2393 return details->winbind_separator;
2398 * Convert a upn to a name.
2400 * @param ctx PAM winbind context.
2401 * @param upn USer UPN to be trabslated.
2403 * @return converted name. NULL pointer on failure. Caller needs to free.
2406 static char* winbind_upn_to_username(struct pwb_context *ctx,
2410 wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
2411 struct wbcDomainSid sid;
2412 enum wbcSidType type;
2413 char *domain = NULL;
2417 /* This cannot work when the winbind separator = @ */
2419 sep = winbind_get_separator(ctx);
2420 if (!sep || sep == '@') {
2424 name = talloc_strdup(ctx, upn);
2428 if ((p = strchr(name, '@')) != NULL) {
2433 /* Convert the UPN to a SID */
2435 wbc_status = wbcLookupName(domain, name, &sid, &type);
2436 if (!WBC_ERROR_IS_OK(wbc_status)) {
2440 /* Convert the the SID back to the sAMAccountName */
2442 wbc_status = wbcLookupSid(&sid, &domain, &name, &type);
2443 if (!WBC_ERROR_IS_OK(wbc_status)) {
2447 return talloc_asprintf(ctx, "%s\\%s", domain, name);
2450 static int _pam_delete_cred(pam_handle_t *pamh, int flags,
2451 int argc, const char **argv)
2453 int retval = PAM_SUCCESS;
2454 struct pwb_context *ctx = NULL;
2455 struct wbcLogoffUserParams logoff;
2456 struct wbcAuthErrorInfo *error = NULL;
2458 wbcErr wbc_status = WBC_ERR_SUCCESS;
2460 ZERO_STRUCT(logoff);
2462 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2467 _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
2469 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2471 /* destroy the ccache here */
2473 uint32_t wbc_flags = 0;
2474 const char *ccname = NULL;
2475 struct passwd *pwd = NULL;
2477 retval = pam_get_user(pamh, &user, _("Username: "));
2479 _pam_log(ctx, LOG_ERR,
2480 "could not identify user");
2485 _pam_log(ctx, LOG_ERR,
2486 "username was NULL!");
2487 retval = PAM_USER_UNKNOWN;
2491 _pam_log_debug(ctx, LOG_DEBUG,
2492 "username [%s] obtained", user);
2494 ccname = pam_getenv(pamh, "KRB5CCNAME");
2495 if (ccname == NULL) {
2496 _pam_log_debug(ctx, LOG_DEBUG,
2497 "user has no KRB5CCNAME environment");
2500 pwd = getpwnam(user);
2502 retval = PAM_USER_UNKNOWN;
2506 wbc_flags = WBFLAG_PAM_KRB5 |
2507 WBFLAG_PAM_CONTACT_TRUSTDOM;
2509 logoff.username = user;
2512 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2516 discard_const_p(uint8_t, ccname),
2518 if (!WBC_ERROR_IS_OK(wbc_status)) {
2523 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2527 (uint8_t *)&wbc_flags,
2529 if (!WBC_ERROR_IS_OK(wbc_status)) {
2533 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2537 (uint8_t *)&pwd->pw_uid,
2538 sizeof(pwd->pw_uid));
2539 if (!WBC_ERROR_IS_OK(wbc_status)) {
2543 wbc_status = wbcLogoffUserEx(&logoff, &error);
2544 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2545 user, "wbcLogoffUser");
2546 wbcFreeMemory(error);
2547 wbcFreeMemory(logoff.blobs);
2548 logoff.blobs = NULL;
2550 if (!WBC_ERROR_IS_OK(wbc_status)) {
2551 _pam_log(ctx, LOG_INFO,
2552 "failed to logoff user %s: %s\n",
2553 user, wbcErrorString(wbc_status));
2559 wbcFreeMemory(logoff.blobs);
2562 if (!WBC_ERROR_IS_OK(wbc_status)) {
2563 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2564 user, "wbcLogoffUser");
2568 * Delete the krb5 ccname variable from the PAM environment
2569 * if it was set by winbind.
2571 if ((ctx->ctrl & WINBIND_KRB5_AUTH) && pam_getenv(pamh, "KRB5CCNAME")) {
2572 pam_putenv(pamh, "KRB5CCNAME");
2575 _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx, retval);
2583 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
2584 int argc, const char **argv)
2586 const char *username;
2587 const char *password;
2588 const char *member = NULL;
2589 const char *cctype = NULL;
2590 int warn_pwd_expire;
2591 int retval = PAM_AUTH_ERR;
2592 char *username_ret = NULL;
2593 char *new_authtok_required = NULL;
2594 char *real_username = NULL;
2595 struct pwb_context *ctx = NULL;
2597 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2602 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
2604 /* Get the username */
2605 retval = pam_get_user(pamh, &username, NULL);
2606 if ((retval != PAM_SUCCESS) || (!username)) {
2607 _pam_log_debug(ctx, LOG_DEBUG,
2608 "can not get the username");
2609 retval = PAM_SERVICE_ERR;
2615 /* Decode the user name since AIX does not support logn user
2616 names by default. The name is encoded as _#uid. */
2618 if (username[0] == '_') {
2619 uid_t id = atoi(&username[1]);
2620 struct passwd *pw = NULL;
2622 if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
2623 real_username = strdup(pw->pw_name);
2628 if (!real_username) {
2629 /* Just making a copy of the username we got from PAM */
2630 if ((real_username = strdup(username)) == NULL) {
2631 _pam_log_debug(ctx, LOG_DEBUG,
2632 "memory allocation failure when copying "
2634 retval = PAM_SERVICE_ERR;
2639 /* Maybe this was a UPN */
2641 if (strchr(real_username, '@') != NULL) {
2642 char *samaccountname = NULL;
2644 samaccountname = winbind_upn_to_username(ctx,
2646 if (samaccountname) {
2647 free(real_username);
2648 real_username = strdup(samaccountname);
2652 retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
2653 _("Password: "), NULL,
2656 if (retval != PAM_SUCCESS) {
2657 _pam_log(ctx, LOG_ERR,
2658 "Could not retrieve user's password");
2659 retval = PAM_AUTHTOK_ERR;
2663 /* Let's not give too much away in the log file */
2665 #ifdef DEBUG_PASSWORD
2666 _pam_log_debug(ctx, LOG_INFO,
2667 "Verify user '%s' with password '%s'",
2668 real_username, password);
2670 _pam_log_debug(ctx, LOG_INFO,
2671 "Verify user '%s'", real_username);
2674 member = get_member_from_config(ctx);
2675 cctype = get_krb5_cc_type_from_config(ctx);
2676 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2678 /* Now use the username to look up password */
2679 retval = winbind_auth_request(ctx, real_username, password,
2680 member, cctype, warn_pwd_expire,
2682 NULL, &username_ret);
2684 if (retval == PAM_NEW_AUTHTOK_REQD ||
2685 retval == PAM_AUTHTOK_EXPIRED) {
2687 char *new_authtok_required_during_auth = NULL;
2689 new_authtok_required = talloc_asprintf(NULL, "%d", retval);
2690 if (!new_authtok_required) {
2691 retval = PAM_BUF_ERR;
2695 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2696 new_authtok_required,
2697 _pam_winbind_cleanup_func);
2699 retval = PAM_SUCCESS;
2701 new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
2702 if (!new_authtok_required_during_auth) {
2703 retval = PAM_BUF_ERR;
2707 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2708 new_authtok_required_during_auth,
2709 _pam_winbind_cleanup_func);
2716 pam_set_item (pamh, PAM_USER, username_ret);
2717 _pam_log_debug(ctx, LOG_INFO,
2718 "Returned user was '%s'", username_ret);
2722 if (real_username) {
2723 free(real_username);
2726 if (!new_authtok_required) {
2727 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2730 if (retval != PAM_SUCCESS) {
2731 _pam_free_data_info3(pamh);
2734 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
2742 int pam_sm_setcred(pam_handle_t *pamh, int flags,
2743 int argc, const char **argv)
2745 int ret = PAM_SYSTEM_ERR;
2746 struct pwb_context *ctx = NULL;
2748 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2753 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
2755 switch (flags & ~PAM_SILENT) {
2757 case PAM_DELETE_CRED:
2758 ret = _pam_delete_cred(pamh, flags, argc, argv);
2760 case PAM_REFRESH_CRED:
2761 _pam_log_debug(ctx, LOG_WARNING,
2762 "PAM_REFRESH_CRED not implemented");
2765 case PAM_REINITIALIZE_CRED:
2766 _pam_log_debug(ctx, LOG_WARNING,
2767 "PAM_REINITIALIZE_CRED not implemented");
2770 case PAM_ESTABLISH_CRED:
2771 _pam_log_debug(ctx, LOG_WARNING,
2772 "PAM_ESTABLISH_CRED not implemented");
2776 ret = PAM_SYSTEM_ERR;
2782 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
2790 * Account management. We want to verify that the account exists
2791 * before returning PAM_SUCCESS
2794 int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2795 int argc, const char **argv)
2797 const char *username;
2798 int ret = PAM_USER_UNKNOWN;
2800 struct pwb_context *ctx = NULL;
2802 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2807 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
2810 /* Get the username */
2811 ret = pam_get_user(pamh, &username, NULL);
2812 if ((ret != PAM_SUCCESS) || (!username)) {
2813 _pam_log_debug(ctx, LOG_DEBUG,
2814 "can not get the username");
2815 ret = PAM_SERVICE_ERR;
2819 /* Verify the username */
2820 ret = valid_user(ctx, username);
2823 /* some sort of system error. The log was already printed */
2824 ret = PAM_SERVICE_ERR;
2827 /* the user does not exist */
2828 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
2830 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
2834 ret = PAM_USER_UNKNOWN;
2837 pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2838 (const void **)&tmp);
2840 ret = atoi((const char *)tmp);
2842 case PAM_AUTHTOK_EXPIRED:
2843 /* fall through, since new token is required in this case */
2844 case PAM_NEW_AUTHTOK_REQD:
2845 _pam_log(ctx, LOG_WARNING,
2846 "pam_sm_acct_mgmt success but %s is set",
2847 PAM_WINBIND_NEW_AUTHTOK_REQD);
2848 _pam_log(ctx, LOG_NOTICE,
2849 "user '%s' needs new password",
2851 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2852 ret = PAM_NEW_AUTHTOK_REQD;
2855 _pam_log(ctx, LOG_WARNING,
2856 "pam_sm_acct_mgmt success");
2857 _pam_log(ctx, LOG_NOTICE,
2858 "user '%s' granted access", username);
2864 /* Otherwise, the authentication looked good */
2865 _pam_log(ctx, LOG_NOTICE,
2866 "user '%s' granted access", username);
2870 /* we don't know anything about this return value */
2871 _pam_log(ctx, LOG_ERR,
2872 "internal module error (ret = %d, user = '%s')",
2874 ret = PAM_SERVICE_ERR;
2878 /* should not be reached */
2883 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
2891 int pam_sm_open_session(pam_handle_t *pamh, int flags,
2892 int argc, const char **argv)
2894 int ret = PAM_SUCCESS;
2895 struct pwb_context *ctx = NULL;
2897 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2902 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
2904 if (ctx->ctrl & WINBIND_MKHOMEDIR) {
2905 /* check and create homedir */
2906 ret = _pam_mkhomedir(ctx);
2909 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
2917 int pam_sm_close_session(pam_handle_t *pamh, int flags,
2918 int argc, const char **argv)
2920 int ret = PAM_SUCCESS;
2921 struct pwb_context *ctx = NULL;
2923 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2928 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
2931 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
2939 * evaluate whether we need to re-authenticate with kerberos after a
2942 * @param ctx PAM winbind context.
2943 * @param user The username
2945 * @return boolean Returns true if required, false if not.
2948 static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
2952 /* Make sure that we only do this if a) the chauthtok got initiated
2953 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2954 * later password change via the "passwd" command if done by the user
2956 * NB. If we login from gdm or xdm and the password expires,
2957 * we change the password, but there is no memory cache.
2958 * Thus, even for passthrough login, we should do the
2959 * authentication again to update memory cache.
2963 char *new_authtok_reqd_during_auth = NULL;
2964 struct passwd *pwd = NULL;
2966 _pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2967 &new_authtok_reqd_during_auth);
2968 pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2971 if (new_authtok_reqd_during_auth) {
2975 pwd = getpwnam(user);
2980 if (getuid() == pwd->pw_uid) {
2989 int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
2990 int argc, const char **argv)
2994 bool cached_login = false;
2996 /* <DO NOT free() THESE> */
2998 char *pass_old, *pass_new;
2999 /* </DO NOT free() THESE> */
3004 char *username_ret = NULL;
3005 struct wbcAuthErrorInfo *error = NULL;
3006 struct pwb_context *ctx = NULL;
3008 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
3013 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
3015 cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
3017 /* clearing offline bit for auth */
3018 ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
3021 * First get the name of a user
3023 ret = pam_get_user(pamh, &user, _("Username: "));
3025 _pam_log(ctx, LOG_ERR,
3026 "password - could not identify user");
3031 _pam_log(ctx, LOG_ERR, "username was NULL!");
3032 ret = PAM_USER_UNKNOWN;
3036 _pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
3038 /* check if this is really a user in winbindd, not only in NSS */
3039 ret = valid_user(ctx, user);
3042 ret = PAM_USER_UNKNOWN;
3045 ret = PAM_SYSTEM_ERR;
3052 * obtain and verify the current password (OLDAUTHTOK) for
3056 if (flags & PAM_PRELIM_CHECK) {
3057 time_t pwdlastset_prelim = 0;
3059 /* instruct user what is happening */
3061 #define greeting _("Changing password for")
3062 Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
3064 _pam_log(ctx, LOG_CRIT,
3065 "password - out of memory");
3071 lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
3072 ret = _winbind_read_password(ctx, lctrl,
3074 _("(current) NT password: "),
3076 (const char **) &pass_old);
3077 TALLOC_FREE(Announce);
3078 if (ret != PAM_SUCCESS) {
3079 _pam_log(ctx, LOG_NOTICE,
3080 "password - (old) token not obtained");
3084 /* verify that this is the password for this user */
3086 ret = winbind_auth_request(ctx, user, pass_old,
3089 &pwdlastset_prelim, NULL);
3091 if (ret != PAM_ACCT_EXPIRED &&
3092 ret != PAM_AUTHTOK_EXPIRED &&
3093 ret != PAM_NEW_AUTHTOK_REQD &&
3094 ret != PAM_SUCCESS) {
3099 pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3100 (void *)pwdlastset_prelim, NULL);
3102 ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
3103 (const void *) pass_old);
3105 if (ret != PAM_SUCCESS) {
3106 _pam_log(ctx, LOG_CRIT,
3107 "failed to set PAM_OLDAUTHTOK");
3109 } else if (flags & PAM_UPDATE_AUTHTOK) {
3111 time_t pwdlastset_update = 0;
3114 * obtain the proposed password
3118 * get the old token back.
3121 ret = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
3123 if (ret != PAM_SUCCESS) {
3124 _pam_log(ctx, LOG_NOTICE,
3125 "user not authenticated");
3129 lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
3131 if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
3132 lctrl |= WINBIND_USE_FIRST_PASS_ARG;
3135 ret = PAM_AUTHTOK_ERR;
3136 while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
3138 * use_authtok is to force the use of a previously entered
3139 * password -- needed for pluggable password strength checking
3142 ret = _winbind_read_password(ctx, lctrl,
3144 _("Enter new NT password: "),
3145 _("Retype new NT password: "),
3146 (const char **)&pass_new);
3148 if (ret != PAM_SUCCESS) {
3149 _pam_log_debug(ctx, LOG_ALERT,
3151 "new password not obtained");
3152 pass_old = NULL;/* tidy up */
3157 * At this point we know who the user is and what they
3158 * propose as their new password. Verify that the new
3159 * password is acceptable.
3162 if (pass_new[0] == '\0') {/* "\0" password = NULL */
3168 * By reaching here we have approved the passwords and must now
3169 * rebuild the password database file.
3171 _pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3172 &pwdlastset_update);
3175 * if cached creds were enabled, make sure to set the
3176 * WINBIND_CACHED_LOGIN bit here in order to have winbindd
3177 * update the cached creds storage - gd
3180 ctx->ctrl |= WINBIND_CACHED_LOGIN;
3183 ret = winbind_chauthtok_request(ctx, user, pass_old,
3184 pass_new, pwdlastset_update);
3186 pass_old = pass_new = NULL;
3190 if (_pam_require_krb5_auth_after_chauthtok(ctx, user)) {
3192 const char *member = NULL;
3193 const char *cctype = NULL;
3194 int warn_pwd_expire;
3195 struct wbcLogonUserInfo *info = NULL;
3196 struct wbcUserPasswordPolicyInfo *policy = NULL;
3198 member = get_member_from_config(ctx);
3199 cctype = get_krb5_cc_type_from_config(ctx);
3200 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
3202 /* Keep WINBIND_CACHED_LOGIN bit for
3203 * authentication after changing the password.
3204 * This will update the cached credentials in case
3205 * that winbindd_dual_pam_chauthtok() fails
3210 ret = winbind_auth_request(ctx, user, pass_new,
3212 &error, &info, &policy,
3213 NULL, &username_ret);
3214 pass_old = pass_new = NULL;
3216 if (ret == PAM_SUCCESS) {
3218 struct wbcAuthUserInfo *user_info = NULL;
3220 if (info && info->info) {
3221 user_info = info->info;
3224 /* warn a user if the password is about to
3226 _pam_warn_password_expiry(ctx, user_info, policy,
3230 /* set some info3 info for other modules in the
3232 _pam_set_data_info3(ctx, user_info);
3234 /* put krb5ccname into env */
3235 _pam_setup_krb5_env(ctx, info);
3238 pam_set_item(pamh, PAM_USER,
3240 _pam_log_debug(ctx, LOG_INFO,
3241 "Returned user was '%s'",
3248 if (info && info->blobs) {
3249 wbcFreeMemory(info->blobs);
3251 wbcFreeMemory(info);
3252 wbcFreeMemory(policy);
3257 ret = PAM_SERVICE_ERR;
3262 /* Deal with offline errors. */
3264 const char *codes[] = {
3265 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3266 "NT_STATUS_NO_LOGON_SERVERS",
3267 "NT_STATUS_ACCESS_DENIED"
3270 for (i=0; i<ARRAY_SIZE(codes); i++) {
3272 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
3278 wbcFreeMemory(error);
3280 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
3289 /* static module data */
3291 struct pam_module _pam_winbind_modstruct = {
3293 pam_sm_authenticate,
3296 pam_sm_open_session,
3297 pam_sm_close_session,
3304 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3305 * Copyright (c) Tim Potter <tpot@samba.org> 2000
3306 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3307 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3308 * Copyright (c) Jan Rêkorajski 1999.
3309 * Copyright (c) Andrew G. Morgan 1996-8.
3310 * Copyright (c) Alex O. Yuriev, 1996.
3311 * Copyright (c) Cristian Gafton 1996.
3312 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3314 * Redistribution and use in source and binary forms, with or without
3315 * modification, are permitted provided that the following conditions
3317 * 1. Redistributions of source code must retain the above copyright
3318 * notice, and the entire permission notice in its entirety,
3319 * including the disclaimer of warranties.
3320 * 2. Redistributions in binary form must reproduce the above copyright
3321 * notice, this list of conditions and the following disclaimer in the
3322 * documentation and/or other materials provided with the distribution.
3323 * 3. The name of the author may not be used to endorse or promote
3324 * products derived from this software without specific prior
3325 * written permission.
3327 * ALTERNATIVELY, this product may be distributed under the terms of
3328 * the GNU Public License, in which case the provisions of the GPL are
3329 * required INSTEAD OF the above restrictions. (This clause is
3330 * necessary due to a potential bad interaction between the GPL and
3331 * the restrictions contained in a BSD-style copyright.)
3333 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3334 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3335 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3336 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3337 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3338 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3339 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3340 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3341 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3342 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3343 * OF THE POSSIBILITY OF SUCH DAMAGE.