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"
14 #define CONST_DISCARD(type,ptr) ((type)(void *)ptr)
17 static int wbc_error_to_pam_error(wbcErr status)
22 case WBC_ERR_NOT_IMPLEMENTED:
23 return PAM_SERVICE_ERR;
24 case WBC_ERR_UNKNOWN_FAILURE:
26 case WBC_ERR_NO_MEMORY:
28 case WBC_ERR_INVALID_SID:
29 case WBC_ERR_INVALID_PARAM:
31 case WBC_ERR_WINBIND_NOT_AVAILABLE:
32 return PAM_AUTHINFO_UNAVAIL;
33 case WBC_ERR_DOMAIN_NOT_FOUND:
34 return PAM_AUTHINFO_UNAVAIL;
35 case WBC_ERR_INVALID_RESPONSE:
37 case WBC_ERR_NSS_ERROR:
38 return PAM_USER_UNKNOWN;
39 case WBC_ERR_AUTH_ERROR:
41 case WBC_ERR_UNKNOWN_USER:
42 return PAM_USER_UNKNOWN;
43 case WBC_ERR_UNKNOWN_GROUP:
44 return PAM_USER_UNKNOWN;
45 case WBC_ERR_PWD_CHANGE_FAILED:
53 static const char *_pam_error_code_str(int err)
59 return "PAM_OPEN_ERR";
61 return "PAM_SYMBOL_ERR";
63 return "PAM_SERVICE_ERR";
65 return "PAM_SYSTEM_ERR";
69 return "PAM_PERM_DENIED";
71 return "PAM_AUTH_ERR";
72 case PAM_CRED_INSUFFICIENT:
73 return "PAM_CRED_INSUFFICIENT";
74 case PAM_AUTHINFO_UNAVAIL:
75 return "PAM_AUTHINFO_UNAVAIL";
76 case PAM_USER_UNKNOWN:
77 return "PAM_USER_UNKNOWN";
79 return "PAM_MAXTRIES";
80 case PAM_NEW_AUTHTOK_REQD:
81 return "PAM_NEW_AUTHTOK_REQD";
82 case PAM_ACCT_EXPIRED:
83 return "PAM_ACCT_EXPIRED";
85 return "PAM_SESSION_ERR";
86 case PAM_CRED_UNAVAIL:
87 return "PAM_CRED_UNAVAIL";
88 case PAM_CRED_EXPIRED:
89 return "PAM_CRED_EXPIRED";
91 return "PAM_CRED_ERR";
92 case PAM_NO_MODULE_DATA:
93 return "PAM_NO_MODULE_DATA";
95 return "PAM_CONV_ERR";
97 return "PAM_AUTHTOK_ERR";
98 case PAM_AUTHTOK_RECOVER_ERR:
99 return "PAM_AUTHTOK_RECOVER_ERR";
100 case PAM_AUTHTOK_LOCK_BUSY:
101 return "PAM_AUTHTOK_LOCK_BUSY";
102 case PAM_AUTHTOK_DISABLE_AGING:
103 return "PAM_AUTHTOK_DISABLE_AGING";
105 return "PAM_TRY_AGAIN";
110 case PAM_AUTHTOK_EXPIRED:
111 return "PAM_AUTHTOK_EXPIRED";
112 #ifdef PAM_MODULE_UNKNOWN
113 case PAM_MODULE_UNKNOWN:
114 return "PAM_MODULE_UNKNOWN";
118 return "PAM_BAD_ITEM";
120 #ifdef PAM_CONV_AGAIN
122 return "PAM_CONV_AGAIN";
124 #ifdef PAM_INCOMPLETE
126 return "PAM_INCOMPLETE";
133 #define _PAM_LOG_FUNCTION_ENTER(function, ctx) \
135 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] ENTER: " \
136 function " (flags: 0x%04x)", ctx->pamh, ctx->flags); \
137 _pam_log_state(ctx); \
140 #define _PAM_LOG_FUNCTION_LEAVE(function, ctx, retval) \
142 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] LEAVE: " \
143 function " returning %d (%s)", ctx->pamh, retval, \
144 _pam_error_code_str(retval)); \
145 _pam_log_state(ctx); \
150 #define MAX_PASSWD_TRIES 3
153 static char initialized = 0;
155 static inline void textdomain_init(void);
156 static inline void textdomain_init(void)
159 bindtextdomain(MODULE_NAME, dyn_LOCALEDIR);
168 * Work around the pam API that has functions with void ** as parameters
169 * These lead to strict aliasing warnings with gcc.
171 static int _pam_get_item(const pam_handle_t *pamh,
175 const void **item = (const void **)_item;
176 return pam_get_item(pamh, item_type, item);
178 static int _pam_get_data(const pam_handle_t *pamh,
179 const char *module_data_name,
182 const void **data = (const void **)_data;
183 return pam_get_data(pamh, module_data_name, data);
186 /* some syslogging */
188 #ifdef HAVE_PAM_VSYSLOG
189 static void _pam_log_int(const pam_handle_t *pamh,
194 pam_vsyslog(pamh, err, format, args);
197 static void _pam_log_int(const pam_handle_t *pamh,
202 char *format2 = NULL;
205 _pam_get_item(pamh, PAM_SERVICE, &service);
207 format2 = (char *)malloc(strlen(MODULE_NAME)+strlen(format)+strlen(service)+5);
208 if (format2 == NULL) {
209 /* what else todo ? */
210 vsyslog(err, format, args);
214 sprintf(format2, "%s(%s): %s", MODULE_NAME, service, format);
215 vsyslog(err, format2, args);
218 #endif /* HAVE_PAM_VSYSLOG */
220 static bool _pam_log_is_silent(int ctrl)
222 return on(ctrl, WINBIND_SILENT);
225 static void _pam_log(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
226 static void _pam_log(struct pwb_context *r, int err, const char *format, ...)
230 if (_pam_log_is_silent(r->ctrl)) {
234 va_start(args, format);
235 _pam_log_int(r->pamh, err, format, args);
238 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
239 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
243 if (_pam_log_is_silent(ctrl)) {
247 va_start(args, format);
248 _pam_log_int(pamh, err, format, args);
252 static bool _pam_log_is_debug_enabled(int ctrl)
258 if (_pam_log_is_silent(ctrl)) {
262 if (!(ctrl & WINBIND_DEBUG_ARG)) {
269 static bool _pam_log_is_debug_state_enabled(int ctrl)
271 if (!(ctrl & WINBIND_DEBUG_STATE)) {
275 return _pam_log_is_debug_enabled(ctrl);
278 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
279 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...)
283 if (!_pam_log_is_debug_enabled(r->ctrl)) {
287 va_start(args, format);
288 _pam_log_int(r->pamh, err, format, args);
291 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
292 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
296 if (!_pam_log_is_debug_enabled(ctrl)) {
300 va_start(args, format);
301 _pam_log_int(pamh, err, format, args);
305 static void _pam_log_state_datum(struct pwb_context *ctx,
310 const void *data = NULL;
311 if (item_type != 0) {
312 pam_get_item(ctx->pamh, item_type, &data);
314 pam_get_data(ctx->pamh, key, &data);
317 const char *type = (item_type != 0) ? "ITEM" : "DATA";
318 if (is_string != 0) {
319 _pam_log_debug(ctx, LOG_DEBUG,
320 "[pamh: %p] STATE: %s(%s) = \"%s\" (%p)",
321 ctx->pamh, type, key, (const char *)data,
324 _pam_log_debug(ctx, LOG_DEBUG,
325 "[pamh: %p] STATE: %s(%s) = %p",
326 ctx->pamh, type, key, data);
331 #define _PAM_LOG_STATE_DATA_POINTER(ctx, module_data_name) \
332 _pam_log_state_datum(ctx, 0, module_data_name, 0)
334 #define _PAM_LOG_STATE_DATA_STRING(ctx, module_data_name) \
335 _pam_log_state_datum(ctx, 0, module_data_name, 1)
337 #define _PAM_LOG_STATE_ITEM_POINTER(ctx, item_type) \
338 _pam_log_state_datum(ctx, item_type, #item_type, 0)
340 #define _PAM_LOG_STATE_ITEM_STRING(ctx, item_type) \
341 _pam_log_state_datum(ctx, item_type, #item_type, 1)
343 #ifdef DEBUG_PASSWORD
344 #define _LOG_PASSWORD_AS_STRING 1
346 #define _LOG_PASSWORD_AS_STRING 0
349 #define _PAM_LOG_STATE_ITEM_PASSWORD(ctx, item_type) \
350 _pam_log_state_datum(ctx, item_type, #item_type, \
351 _LOG_PASSWORD_AS_STRING)
353 static void _pam_log_state(struct pwb_context *ctx)
355 if (!_pam_log_is_debug_state_enabled(ctx->ctrl)) {
359 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_SERVICE);
360 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER);
361 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_TTY);
362 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RHOST);
363 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RUSER);
364 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_OLDAUTHTOK);
365 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_AUTHTOK);
366 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER_PROMPT);
367 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_CONV);
368 #ifdef PAM_FAIL_DELAY
369 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_FAIL_DELAY);
371 #ifdef PAM_REPOSITORY
372 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_REPOSITORY);
375 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_HOMEDIR);
376 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSCRIPT);
377 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSERVER);
378 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_PROFILEPATH);
379 _PAM_LOG_STATE_DATA_STRING(ctx,
380 PAM_WINBIND_NEW_AUTHTOK_REQD);
381 /* Use atoi to get PAM result code */
382 _PAM_LOG_STATE_DATA_STRING(ctx,
383 PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
384 _PAM_LOG_STATE_DATA_POINTER(ctx, PAM_WINBIND_PWD_LAST_SET);
387 static int _pam_parse(const pam_handle_t *pamh,
391 dictionary **result_d)
394 const char *config_file = NULL;
397 dictionary *d = NULL;
399 if (flags & PAM_SILENT) {
400 ctrl |= WINBIND_SILENT;
403 for (i=argc,v=argv; i-- > 0; ++v) {
404 if (!strncasecmp(*v, "config", strlen("config"))) {
405 ctrl |= WINBIND_CONFIG_FILE;
411 if (config_file == NULL) {
412 config_file = PAM_WINBIND_CONFIG_FILE;
415 d = iniparser_load(CONST_DISCARD(char *, config_file));
417 goto config_from_pam;
420 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:debug"), false)) {
421 ctrl |= WINBIND_DEBUG_ARG;
424 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:debug_state"), false)) {
425 ctrl |= WINBIND_DEBUG_STATE;
428 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:cached_login"), false)) {
429 ctrl |= WINBIND_CACHED_LOGIN;
432 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:krb5_auth"), false)) {
433 ctrl |= WINBIND_KRB5_AUTH;
436 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:silent"), false)) {
437 ctrl |= WINBIND_SILENT;
440 if (iniparser_getstr(d, CONST_DISCARD(char *, "global:krb5_ccache_type")) != NULL) {
441 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
444 if ((iniparser_getstr(d, CONST_DISCARD(char *, "global:require-membership-of"))
446 (iniparser_getstr(d, CONST_DISCARD(char *, "global:require_membership_of"))
448 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
451 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:try_first_pass"), false)) {
452 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
455 if (iniparser_getint(d, CONST_DISCARD(char *, "global:warn_pwd_expire"), 0)) {
456 ctrl |= WINBIND_WARN_PWD_EXPIRE;
459 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:mkhomedir"), false)) {
460 ctrl |= WINBIND_MKHOMEDIR;
464 /* step through arguments */
465 for (i=argc,v=argv; i-- > 0; ++v) {
467 /* generic options */
468 if (!strcmp(*v,"debug"))
469 ctrl |= WINBIND_DEBUG_ARG;
470 else if (!strcasecmp(*v, "debug_state"))
471 ctrl |= WINBIND_DEBUG_STATE;
472 else if (!strcasecmp(*v, "silent"))
473 ctrl |= WINBIND_SILENT;
474 else if (!strcasecmp(*v, "use_authtok"))
475 ctrl |= WINBIND_USE_AUTHTOK_ARG;
476 else if (!strcasecmp(*v, "use_first_pass"))
477 ctrl |= WINBIND_USE_FIRST_PASS_ARG;
478 else if (!strcasecmp(*v, "try_first_pass"))
479 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
480 else if (!strcasecmp(*v, "unknown_ok"))
481 ctrl |= WINBIND_UNKNOWN_OK_ARG;
482 else if (!strncasecmp(*v, "require_membership_of",
483 strlen("require_membership_of")))
484 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
485 else if (!strncasecmp(*v, "require-membership-of",
486 strlen("require-membership-of")))
487 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
488 else if (!strcasecmp(*v, "krb5_auth"))
489 ctrl |= WINBIND_KRB5_AUTH;
490 else if (!strncasecmp(*v, "krb5_ccache_type",
491 strlen("krb5_ccache_type")))
492 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
493 else if (!strcasecmp(*v, "cached_login"))
494 ctrl |= WINBIND_CACHED_LOGIN;
495 else if (!strcasecmp(*v, "mkhomedir"))
496 ctrl |= WINBIND_MKHOMEDIR;
498 __pam_log(pamh, ctrl, LOG_ERR,
499 "pam_parse: unknown option: %s", *v);
509 iniparser_freedict(d);
516 static int _pam_winbind_free_context(struct pwb_context *ctx)
523 iniparser_freedict(ctx->dict);
529 static int _pam_winbind_init_context(pam_handle_t *pamh,
533 struct pwb_context **ctx_p)
535 struct pwb_context *r = NULL;
541 r = TALLOC_ZERO_P(NULL, struct pwb_context);
546 talloc_set_destructor(r, _pam_winbind_free_context);
552 r->ctrl = _pam_parse(pamh, flags, argc, argv, &r->dict);
555 return PAM_SYSTEM_ERR;
563 static void _pam_winbind_cleanup_func(pam_handle_t *pamh,
567 int ctrl = _pam_parse(pamh, 0, 0, NULL, NULL);
568 if (_pam_log_is_debug_state_enabled(ctrl)) {
569 __pam_log_debug(pamh, ctrl, LOG_DEBUG,
570 "[pamh: %p] CLEAN: cleaning up PAM data %p "
571 "(error_status = %d)", pamh, data,
578 static const struct ntstatus_errors {
579 const char *ntstatus_string;
580 const char *error_string;
581 } ntstatus_errors[] = {
584 {"NT_STATUS_BACKUP_CONTROLLER",
585 N_("No primary Domain Controler available")},
586 {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
587 N_("No domain controllers found")},
588 {"NT_STATUS_NO_LOGON_SERVERS",
589 N_("No logon servers")},
590 {"NT_STATUS_PWD_TOO_SHORT",
591 N_("Password too short")},
592 {"NT_STATUS_PWD_TOO_RECENT",
593 N_("The password of this user is too recent to change")},
594 {"NT_STATUS_PWD_HISTORY_CONFLICT",
595 N_("Password is already in password history")},
596 {"NT_STATUS_PASSWORD_EXPIRED",
597 N_("Your password has expired")},
598 {"NT_STATUS_PASSWORD_MUST_CHANGE",
599 N_("You need to change your password now")},
600 {"NT_STATUS_INVALID_WORKSTATION",
601 N_("You are not allowed to logon from this workstation")},
602 {"NT_STATUS_INVALID_LOGON_HOURS",
603 N_("You are not allowed to logon at this time")},
604 {"NT_STATUS_ACCOUNT_EXPIRED",
605 N_("Your account has expired. "
606 "Please contact your System administrator")}, /* SCNR */
607 {"NT_STATUS_ACCOUNT_DISABLED",
608 N_("Your account is disabled. "
609 "Please contact your System administrator")}, /* SCNR */
610 {"NT_STATUS_ACCOUNT_LOCKED_OUT",
611 N_("Your account has been locked. "
612 "Please contact your System administrator")}, /* SCNR */
613 {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
614 N_("Invalid Trust Account")},
615 {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
616 N_("Invalid Trust Account")},
617 {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
618 N_("Invalid Trust Account")},
619 {"NT_STATUS_ACCESS_DENIED",
620 N_("Access is denied")},
624 static const char *_get_ntstatus_error_string(const char *nt_status_string)
627 for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
628 if (!strcasecmp(ntstatus_errors[i].ntstatus_string,
630 return _(ntstatus_errors[i].error_string);
636 /* --- authentication management functions --- */
638 /* Attempt a conversation */
640 static int converse(const pam_handle_t *pamh,
642 struct pam_message **message,
643 struct pam_response **response)
646 struct pam_conv *conv;
648 retval = _pam_get_item(pamh, PAM_CONV, &conv);
649 if (retval == PAM_SUCCESS) {
650 retval = conv->conv(nargs,
651 (const struct pam_message **)message,
652 response, conv->appdata_ptr);
655 return retval; /* propagate error status */
659 static int _make_remark(struct pwb_context *ctx,
663 int retval = PAM_SUCCESS;
665 struct pam_message *pmsg[1], msg[1];
666 struct pam_response *resp;
668 if (ctx->flags & WINBIND_SILENT) {
673 msg[0].msg = discard_const_p(char, text);
674 msg[0].msg_style = type;
677 retval = converse(ctx->pamh, 1, pmsg, &resp);
680 _pam_drop_reply(resp, 1);
685 static int _make_remark_v(struct pwb_context *ctx,
693 ret = vasprintf(&var, format, args);
695 _pam_log(ctx, LOG_ERR, "memory allocation failure");
699 ret = _make_remark(ctx, type, var);
704 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
705 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...)
710 va_start(args, format);
711 ret = _make_remark_v(ctx, type, format, args);
716 static int pam_winbind_request_log(struct pwb_context *ctx,
723 /* incorrect password */
724 _pam_log(ctx, LOG_WARNING, "user '%s' denied access "
725 "(incorrect password or invalid membership)", user);
727 case PAM_ACCT_EXPIRED:
728 /* account expired */
729 _pam_log(ctx, LOG_WARNING, "user '%s' account expired",
732 case PAM_AUTHTOK_EXPIRED:
733 /* password expired */
734 _pam_log(ctx, LOG_WARNING, "user '%s' password expired",
737 case PAM_NEW_AUTHTOK_REQD:
738 /* new password required */
739 _pam_log(ctx, LOG_WARNING, "user '%s' new password "
742 case PAM_USER_UNKNOWN:
743 /* the user does not exist */
744 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
746 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
751 /* Otherwise, the authentication looked good */
752 if (strcmp(fn, "wbcLogonUser") == 0) {
753 _pam_log(ctx, LOG_NOTICE,
754 "user '%s' granted access", user);
756 _pam_log(ctx, LOG_NOTICE,
757 "user '%s' OK", user);
761 /* we don't know anything about this return value */
762 _pam_log(ctx, LOG_ERR,
763 "internal module error (retval = %s(%d), user = '%s')",
764 _pam_error_code_str(retval), retval, user);
769 static int wbc_auth_error_to_pam_error(struct pwb_context *ctx,
770 struct wbcAuthErrorInfo *e,
772 const char *username,
775 int ret = PAM_AUTH_ERR;
777 if (WBC_ERROR_IS_OK(status)) {
778 _pam_log_debug(ctx, LOG_DEBUG, "request %s succeeded",
781 return pam_winbind_request_log(ctx, ret, username, fn);
785 if (e->pam_error != PAM_SUCCESS) {
786 _pam_log(ctx, LOG_ERR,
787 "request %s failed: %s, "
788 "PAM error: %s (%d), NTSTATUS: %s, "
789 "Error message was: %s",
791 wbcErrorString(status),
792 _pam_error_code_str(e->pam_error),
797 return pam_winbind_request_log(ctx, ret, username, fn);
800 _pam_log(ctx, LOG_ERR, "request %s failed, but PAM error 0!", fn);
802 ret = PAM_SERVICE_ERR;
803 return pam_winbind_request_log(ctx, ret, username, fn);
806 ret = wbc_error_to_pam_error(status);
807 return pam_winbind_request_log(ctx, ret, username, fn);
810 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
812 struct pam_message msg, *pmsg;
813 struct pam_response *resp = NULL;
817 prompt = _("Do you want to change your password now?");
819 msg.msg_style = PAM_RADIO_TYPE;
821 ret = converse(ctx->pamh, 1, &pmsg, &resp);
823 if (ret == PAM_SUCCESS) {
824 _pam_log(ctx, LOG_CRIT, "pam_winbind: system error!\n");
828 if (ret != PAM_SUCCESS) {
831 _pam_log(ctx, LOG_CRIT, "Received [%s] reply from application.\n", resp->resp);
833 if (strcasecmp(resp->resp, "yes") == 0) {
837 _pam_drop_reply(resp, 1);
843 * send a password expiry message if required
845 * @param ctx PAM winbind context.
846 * @param next_change expected (calculated) next expiry date.
847 * @param already_expired pointer to a boolean to indicate if the password is
850 * @return boolean Returns true if message has been sent, false if not.
853 static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
857 bool *already_expired,
861 struct tm tm_now, tm_next_change;
865 if (already_expired) {
866 *already_expired = false;
873 if (next_change <= now) {
874 PAM_WB_REMARK_DIRECT(ctx, "NT_STATUS_PASSWORD_EXPIRED");
875 if (already_expired) {
876 *already_expired = true;
881 if ((next_change < 0) ||
882 (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
886 if ((localtime_r(&now, &tm_now) == NULL) ||
887 (localtime_r(&next_change, &tm_next_change) == NULL)) {
891 days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) -
892 (tm_now.tm_yday+tm_now.tm_year*365);
895 ret = _make_remark(ctx, PAM_TEXT_INFO,
896 _("Your password expires today.\n"));
899 * If change_pwd and already_expired is null.
900 * We are just sending a notification message.
901 * We don't expect any response in this case.
904 if (!change_pwd && !already_expired) {
909 * successfully sent the warning message.
910 * Give the user a chance to change pwd.
912 if (ret == PAM_SUCCESS) {
914 retval = _pam_winbind_change_pwd(ctx);
923 if (days > 0 && days < warn_pwd_expire) {
925 ret = _make_remark_format(ctx, PAM_TEXT_INFO,
926 _("Your password will expire in %d %s.\n"),
927 days, (days > 1) ? _("days"):_("day"));
929 * If change_pwd and already_expired is null.
930 * We are just sending a notification message.
931 * We don't expect any response in this case.
934 if (!change_pwd && !already_expired) {
939 * successfully sent the warning message.
940 * Give the user a chance to change pwd.
942 if (ret == PAM_SUCCESS) {
944 retval = _pam_winbind_change_pwd(ctx);
957 * Send a warning if the password expires in the near future
959 * @param ctx PAM winbind context.
960 * @param response The full authentication response structure.
961 * @param already_expired boolean, is the pwd already expired?
966 static void _pam_warn_password_expiry(struct pwb_context *ctx,
967 const struct wbcAuthUserInfo *info,
968 const struct wbcUserPasswordPolicyInfo *policy,
970 bool *already_expired,
973 time_t now = time(NULL);
974 time_t next_change = 0;
976 if (!info || !policy) {
980 if (already_expired) {
981 *already_expired = false;
988 /* accounts with WBC_ACB_PWNOEXP set never receive a warning */
989 if (info->acct_flags & WBC_ACB_PWNOEXP) {
993 /* no point in sending a warning if this is a grace logon */
994 if (PAM_WB_GRACE_LOGON(info->user_flags)) {
998 /* check if the info3 must change timestamp has been set */
999 next_change = info->pass_must_change_time;
1001 if (_pam_send_password_expiry_message(ctx, next_change, now,
1008 /* now check for the global password policy */
1009 /* good catch from Ralf Haferkamp: an expiry of "never" is translated
1011 if ((policy->expire == (int64_t)-1) ||
1012 (policy->expire == 0)) {
1016 next_change = info->pass_last_set_time + policy->expire;
1018 if (_pam_send_password_expiry_message(ctx, next_change, now,
1025 /* no warning sent */
1028 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
1031 * Append a string, making sure not to overflow and to always return a
1032 * NULL-terminated string.
1034 * @param dest Destination string buffer (must already be NULL-terminated).
1035 * @param src Source string buffer.
1036 * @param dest_buffer_size Size of dest buffer in bytes.
1038 * @return false if dest buffer is not big enough (no bytes copied), true on
1042 static bool safe_append_string(char *dest,
1044 int dest_buffer_size)
1046 int dest_length = strlen(dest);
1047 int src_length = strlen(src);
1049 if (dest_length + src_length + 1 > dest_buffer_size) {
1053 memcpy(dest + dest_length, src, src_length + 1);
1058 * Convert a names into a SID string, appending it to a buffer.
1060 * @param ctx PAM winbind context.
1061 * @param user User in PAM request.
1062 * @param name Name to convert.
1063 * @param sid_list_buffer Where to append the string sid.
1064 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1066 * @return false on failure, true on success.
1068 static bool winbind_name_to_sid_string(struct pwb_context *ctx,
1071 char *sid_list_buffer,
1072 int sid_list_buffer_size)
1074 const char* sid_string = NULL;
1075 char *sid_str = NULL;
1078 if (IS_SID_STRING(name)) {
1082 struct wbcDomainSid sid;
1083 enum wbcSidType type;
1085 _pam_log_debug(ctx, LOG_DEBUG,
1086 "no sid given, looking up: %s\n", name);
1088 wbc_status = wbcLookupName("", name, &sid, &type);
1089 if (!WBC_ERROR_IS_OK(wbc_status)) {
1090 _pam_log(ctx, LOG_INFO,
1091 "could not lookup name: %s\n", name);
1095 wbc_status = wbcSidToString(&sid, &sid_str);
1096 if (!WBC_ERROR_IS_OK(wbc_status)) {
1100 sid_string = sid_str;
1103 if (!safe_append_string(sid_list_buffer, sid_string,
1104 sid_list_buffer_size)) {
1105 wbcFreeMemory(sid_str);
1109 wbcFreeMemory(sid_str);
1114 * Convert a list of names into a list of sids.
1116 * @param ctx PAM winbind context.
1117 * @param user User in PAM request.
1118 * @param name_list List of names or string sids, separated by commas.
1119 * @param sid_list_buffer Where to put the list of string sids.
1120 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1122 * @return false on failure, true on success.
1124 static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
1126 const char *name_list,
1127 char *sid_list_buffer,
1128 int sid_list_buffer_size)
1130 bool result = false;
1131 char *current_name = NULL;
1132 const char *search_location;
1135 if (sid_list_buffer_size > 0) {
1136 sid_list_buffer[0] = 0;
1139 search_location = name_list;
1140 while ((comma = strstr(search_location, ",")) != NULL) {
1141 current_name = strndup(search_location,
1142 comma - search_location);
1143 if (NULL == current_name) {
1147 if (!winbind_name_to_sid_string(ctx, user,
1150 sid_list_buffer_size)) {
1152 * If one group name failed, we must not fail
1153 * the authentication totally, continue with
1154 * the following group names. If user belongs to
1155 * one of the valid groups, we must allow it
1159 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1160 "check if group %s is valid group.", current_name,
1162 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1163 "to sid, please contact your administrator to see "
1164 "if group %s is valid."), current_name, current_name);
1165 SAFE_FREE(current_name);
1166 search_location = comma + 1;
1170 SAFE_FREE(current_name);
1172 if (!safe_append_string(sid_list_buffer, ",",
1173 sid_list_buffer_size)) {
1177 search_location = comma + 1;
1180 if (!winbind_name_to_sid_string(ctx, user, search_location,
1182 sid_list_buffer_size)) {
1183 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1184 "check if group %s is valid group.", search_location,
1186 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1187 "to sid, please contact your administrator to see "
1188 "if group %s is valid."), search_location, search_location);
1194 SAFE_FREE(current_name);
1199 * put krb5ccname variable into environment
1201 * @param ctx PAM winbind context.
1202 * @param krb5ccname env variable retrieved from winbindd.
1207 static void _pam_setup_krb5_env(struct pwb_context *ctx,
1208 struct wbcLogonUserInfo *info)
1213 const char *krb5ccname = NULL;
1215 if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
1223 for (i=0; i < info->num_blobs; i++) {
1224 if (strcasecmp(info->blobs[i].name, "krb5ccname") == 0) {
1225 krb5ccname = (const char *)info->blobs[i].blob.data;
1230 if (!krb5ccname || (strlen(krb5ccname) == 0)) {
1234 _pam_log_debug(ctx, LOG_DEBUG,
1235 "request returned KRB5CCNAME: %s", krb5ccname);
1237 if (snprintf(var, sizeof(var), "KRB5CCNAME=%s", krb5ccname) == -1) {
1241 ret = pam_putenv(ctx->pamh, var);
1243 _pam_log(ctx, LOG_ERR,
1244 "failed to set KRB5CCNAME to %s: %s",
1245 var, pam_strerror(ctx->pamh, ret));
1250 * Copy unix username if available (further processed in PAM).
1252 * @param ctx PAM winbind context
1253 * @param user_ret A pointer that holds a pointer to a string
1254 * @param unix_username A username
1259 static void _pam_setup_unix_username(struct pwb_context *ctx,
1261 struct wbcLogonUserInfo *info)
1263 const char *unix_username = NULL;
1266 if (!user_ret || !info) {
1270 for (i=0; i < info->num_blobs; i++) {
1271 if (strcasecmp(info->blobs[i].name, "unix_username") == 0) {
1272 unix_username = (const char *)info->blobs[i].blob.data;
1277 if (!unix_username || !unix_username[0]) {
1281 *user_ret = strdup(unix_username);
1285 * Set string into the PAM stack.
1287 * @param ctx PAM winbind context.
1288 * @param data_name Key name for pam_set_data.
1289 * @param value String value.
1294 static void _pam_set_data_string(struct pwb_context *ctx,
1295 const char *data_name,
1300 if (!data_name || !value || (strlen(data_name) == 0) ||
1301 (strlen(value) == 0)) {
1305 ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
1306 _pam_winbind_cleanup_func);
1308 _pam_log_debug(ctx, LOG_DEBUG,
1309 "Could not set data %s: %s\n",
1310 data_name, pam_strerror(ctx->pamh, ret));
1315 * Set info3 strings into the PAM stack.
1317 * @param ctx PAM winbind context.
1318 * @param data_name Key name for pam_set_data.
1319 * @param value String value.
1324 static void _pam_set_data_info3(struct pwb_context *ctx,
1325 const struct wbcAuthUserInfo *info)
1327 _pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
1328 info->home_directory);
1329 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
1330 info->logon_script);
1331 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
1332 info->logon_server);
1333 _pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
1334 info->profile_path);
1338 * Free info3 strings in the PAM stack.
1340 * @param pamh PAM handle
1345 static void _pam_free_data_info3(pam_handle_t *pamh)
1347 pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1348 pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1349 pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1350 pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1354 * Send PAM_ERROR_MSG for cached or grace logons.
1356 * @param ctx PAM winbind context.
1357 * @param username User in PAM request.
1358 * @param info3_user_flgs Info3 flags containing logon type bits.
1363 static void _pam_warn_logon_type(struct pwb_context *ctx,
1364 const char *username,
1365 uint32_t info3_user_flgs)
1367 /* inform about logon type */
1368 if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1370 _make_remark(ctx, PAM_ERROR_MSG,
1372 "Please change your password as soon you're "
1374 _pam_log_debug(ctx, LOG_DEBUG,
1375 "User %s logged on using grace logon\n",
1378 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1380 _make_remark(ctx, PAM_ERROR_MSG,
1381 _("Domain Controller unreachable, "
1382 "using cached credentials instead. "
1383 "Network resources may be unavailable"));
1384 _pam_log_debug(ctx, LOG_DEBUG,
1385 "User %s logged on using cached credentials\n",
1391 * Send PAM_ERROR_MSG for krb5 errors.
1393 * @param ctx PAM winbind context.
1394 * @param username User in PAM request.
1395 * @param info3_user_flgs Info3 flags containing logon type bits.
1400 static void _pam_warn_krb5_failure(struct pwb_context *ctx,
1401 const char *username,
1402 uint32_t info3_user_flgs)
1404 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1405 _make_remark(ctx, PAM_ERROR_MSG,
1406 _("Failed to establish your Kerberos Ticket cache "
1407 "due time differences\n"
1408 "with the domain controller. "
1409 "Please verify the system time.\n"));
1410 _pam_log_debug(ctx, LOG_DEBUG,
1411 "User %s: Clock skew when getting Krb5 TGT\n",
1416 static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
1417 const struct wbcAuthErrorInfo *e,
1418 const char *nt_status_string,
1421 const char *ntstatus = NULL;
1422 const char *error_string = NULL;
1424 if (!e || !pam_error) {
1428 ntstatus = e->nt_string;
1433 if (strcasecmp(ntstatus, nt_status_string) == 0) {
1435 error_string = _get_ntstatus_error_string(nt_status_string);
1437 _make_remark(ctx, PAM_ERROR_MSG, error_string);
1438 *pam_error = e->pam_error;
1442 if (e->display_string) {
1443 _make_remark(ctx, PAM_ERROR_MSG, e->display_string);
1444 *pam_error = e->pam_error;
1448 _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
1449 *pam_error = e->pam_error;
1458 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1460 * @param i The wbcUserPasswordPolicyInfo struct.
1462 * @return string (caller needs to talloc_free).
1465 static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
1466 struct wbcUserPasswordPolicyInfo *i)
1474 str = talloc_asprintf(ctx, _("Your password "));
1479 if (i->min_length_password > 0) {
1480 str = talloc_asprintf_append(str,
1481 _("must be at least %d characters; "),
1482 i->min_length_password);
1488 if (i->password_history > 0) {
1489 str = talloc_asprintf_append(str,
1490 _("cannot repeat any of your previous %d "
1492 i->password_history);
1498 if (i->password_properties & WBC_DOMAIN_PASSWORD_COMPLEX) {
1499 str = talloc_asprintf_append(str,
1500 _("must contain capitals, numerals "
1502 "and cannot contain your account "
1509 str = talloc_asprintf_append(str,
1510 _("Please type a different password. "
1511 "Type a password which meets these requirements in "
1512 "both text boxes."));
1524 static int _pam_create_homedir(struct pwb_context *ctx,
1525 const char *dirname,
1530 if (stat(dirname, &sbuf) == 0) {
1534 if (mkdir(dirname, mode) != 0) {
1536 _make_remark_format(ctx, PAM_TEXT_INFO,
1537 _("Creating directory: %s failed: %s"),
1538 dirname, strerror(errno));
1539 _pam_log(ctx, LOG_ERR, "could not create dir: %s (%s)",
1540 dirname, strerror(errno));
1541 return PAM_PERM_DENIED;
1547 static int _pam_chown_homedir(struct pwb_context *ctx,
1548 const char *dirname,
1552 if (chown(dirname, uid, gid) != 0) {
1553 _pam_log(ctx, LOG_ERR, "failed to chown user homedir: %s (%s)",
1554 dirname, strerror(errno));
1555 return PAM_PERM_DENIED;
1561 static int _pam_mkhomedir(struct pwb_context *ctx)
1563 struct passwd *pwd = NULL;
1565 char *create_dir = NULL;
1566 char *user_dir = NULL;
1568 const char *username;
1570 char *safe_ptr = NULL;
1573 /* Get the username */
1574 ret = pam_get_user(ctx->pamh, &username, NULL);
1575 if ((ret != PAM_SUCCESS) || (!username)) {
1576 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1577 return PAM_SERVICE_ERR;
1580 pwd = getpwnam(username);
1582 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1583 return PAM_USER_UNKNOWN;
1585 _pam_log_debug(ctx, LOG_DEBUG, "homedir is: %s", pwd->pw_dir);
1587 ret = _pam_create_homedir(ctx, pwd->pw_dir, 0700);
1588 if (ret == PAM_SUCCESS) {
1589 ret = _pam_chown_homedir(ctx, pwd->pw_dir,
1594 if (ret == PAM_SUCCESS) {
1598 /* maybe we need to create parent dirs */
1599 create_dir = talloc_strdup(ctx, "/");
1604 /* find final directory */
1605 user_dir = strrchr(pwd->pw_dir, '/');
1611 _pam_log(ctx, LOG_DEBUG, "final directory: %s", user_dir);
1615 while ((token = strtok_r(p, "/", &safe_ptr)) != NULL) {
1621 _pam_log_debug(ctx, LOG_DEBUG, "token is %s", token);
1623 create_dir = talloc_asprintf_append(create_dir, "%s/", token);
1627 _pam_log_debug(ctx, LOG_DEBUG, "current_dir is %s", create_dir);
1629 if (strcmp(token, user_dir) == 0) {
1630 _pam_log_debug(ctx, LOG_DEBUG, "assuming last directory: %s", token);
1634 ret = _pam_create_homedir(ctx, create_dir, mode);
1640 return _pam_chown_homedir(ctx, create_dir,
1645 /* talk to winbindd */
1646 static int winbind_auth_request(struct pwb_context *ctx,
1651 const int warn_pwd_expire,
1652 struct wbcAuthErrorInfo **p_error,
1653 struct wbcLogonUserInfo **p_info,
1654 struct wbcUserPasswordPolicyInfo **p_policy,
1655 time_t *pwd_last_set,
1660 struct wbcLogonUserParams logon;
1661 char membership_of[1024];
1662 uid_t user_uid = -1;
1663 uint32_t flags = WBFLAG_PAM_INFO3_TEXT |
1664 WBFLAG_PAM_GET_PWD_POLICY;
1666 struct wbcLogonUserInfo *info = NULL;
1667 struct wbcAuthUserInfo *user_info = NULL;
1668 struct wbcAuthErrorInfo *error = NULL;
1669 struct wbcUserPasswordPolicyInfo *policy = NULL;
1671 int ret = PAM_AUTH_ERR;
1673 const char *codes[] = {
1674 "NT_STATUS_PASSWORD_EXPIRED",
1675 "NT_STATUS_PASSWORD_MUST_CHANGE",
1676 "NT_STATUS_INVALID_WORKSTATION",
1677 "NT_STATUS_INVALID_LOGON_HOURS",
1678 "NT_STATUS_ACCOUNT_EXPIRED",
1679 "NT_STATUS_ACCOUNT_DISABLED",
1680 "NT_STATUS_ACCOUNT_LOCKED_OUT",
1681 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1682 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1683 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1684 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1685 "NT_STATUS_NO_LOGON_SERVERS",
1686 "NT_STATUS_WRONG_PASSWORD",
1687 "NT_STATUS_ACCESS_DENIED"
1694 /* Krb5 auth always has to go against the KDC of the user's realm */
1696 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1697 flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
1700 if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1701 struct passwd *pwd = NULL;
1703 pwd = getpwnam(user);
1705 return PAM_USER_UNKNOWN;
1707 user_uid = pwd->pw_uid;
1710 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1712 _pam_log_debug(ctx, LOG_DEBUG,
1713 "enabling krb5 login flag\n");
1715 flags |= WBFLAG_PAM_KRB5 |
1716 WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1719 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1720 _pam_log_debug(ctx, LOG_DEBUG,
1721 "enabling cached login flag\n");
1722 flags |= WBFLAG_PAM_CACHED_LOGIN;
1727 flags |= WBFLAG_PAM_UNIX_NAME;
1730 if (cctype != NULL) {
1731 _pam_log_debug(ctx, LOG_DEBUG,
1732 "enabling request for a %s krb5 ccache\n",
1736 if (member != NULL) {
1738 ZERO_STRUCT(membership_of);
1740 if (!winbind_name_list_to_sid_string_list(ctx, user, member,
1742 sizeof(membership_of))) {
1743 _pam_log_debug(ctx, LOG_ERR,
1744 "failed to serialize membership of sid "
1745 "\"%s\"\n", member);
1746 return PAM_AUTH_ERR;
1752 logon.username = user;
1753 logon.password = pass;
1756 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1762 if (!WBC_ERROR_IS_OK(wbc_status)) {
1767 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1773 if (!WBC_ERROR_IS_OK(wbc_status)) {
1777 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1781 (uint8_t *)&user_uid,
1783 if (!WBC_ERROR_IS_OK(wbc_status)) {
1788 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1792 (uint8_t *)membership_of,
1793 sizeof(membership_of));
1794 if (!WBC_ERROR_IS_OK(wbc_status)) {
1799 wbc_status = wbcLogonUser(&logon, &info, &error, &policy);
1800 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1801 user, "wbcLogonUser");
1802 wbcFreeMemory(logon.blobs);
1805 if (info && info->info) {
1806 user_info = info->info;
1809 if (pwd_last_set && user_info) {
1810 *pwd_last_set = user_info->pass_last_set_time;
1813 if (p_info && info) {
1817 if (p_policy && policy) {
1821 if (p_error && error) {
1822 /* We want to process the error in the caller. */
1827 for (i=0; i<ARRAY_SIZE(codes); i++) {
1829 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1835 if ((ret == PAM_SUCCESS) && user_info && policy && info) {
1837 bool already_expired = false;
1838 bool change_pwd = false;
1840 /* warn a user if the password is about to expire soon */
1841 _pam_warn_password_expiry(ctx, user_info, policy,
1846 if (already_expired == true) {
1848 SMB_TIME_T last_set = user_info->pass_last_set_time;
1850 _pam_log_debug(ctx, LOG_DEBUG,
1851 "Password has expired "
1852 "(Password was last set: %lld, "
1853 "the policy says it should expire here "
1854 "%lld (now it's: %ld))\n",
1855 (long long int)last_set,
1856 (long long int)last_set +
1860 return PAM_AUTHTOK_EXPIRED;
1864 ret = PAM_NEW_AUTHTOK_REQD;
1868 /* inform about logon type */
1869 _pam_warn_logon_type(ctx, user, user_info->user_flags);
1871 /* inform about krb5 failures */
1872 _pam_warn_krb5_failure(ctx, user, user_info->user_flags);
1874 /* set some info3 info for other modules in the stack */
1875 _pam_set_data_info3(ctx, user_info);
1877 /* put krb5ccname into env */
1878 _pam_setup_krb5_env(ctx, info);
1880 /* If winbindd returned a username, return the pointer to it
1882 _pam_setup_unix_username(ctx, user_ret, info);
1887 wbcFreeMemory(logon.blobs);
1889 if (info && info->blobs && !p_info) {
1890 wbcFreeMemory(info->blobs);
1892 if (error && !p_error) {
1893 wbcFreeMemory(error);
1895 if (info && !p_info) {
1896 wbcFreeMemory(info);
1898 if (policy && !p_policy) {
1899 wbcFreeMemory(policy);
1905 /* talk to winbindd */
1906 static int winbind_chauthtok_request(struct pwb_context *ctx,
1908 const char *oldpass,
1909 const char *newpass,
1910 time_t pwd_last_set)
1913 struct wbcChangePasswordParams params;
1914 struct wbcAuthErrorInfo *error = NULL;
1915 struct wbcUserPasswordPolicyInfo *policy = NULL;
1916 enum wbcPasswordChangeRejectReason reject_reason = -1;
1920 const char *codes[] = {
1921 "NT_STATUS_BACKUP_CONTROLLER",
1922 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1923 "NT_STATUS_NO_LOGON_SERVERS",
1924 "NT_STATUS_ACCESS_DENIED",
1925 "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1926 "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1927 "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1929 int ret = PAM_AUTH_ERR;
1931 ZERO_STRUCT(params);
1933 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1934 flags |= WBFLAG_PAM_KRB5 |
1935 WBFLAG_PAM_CONTACT_TRUSTDOM;
1938 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1939 flags |= WBFLAG_PAM_CACHED_LOGIN;
1942 params.account_name = user;
1943 params.level = WBC_AUTH_USER_LEVEL_PLAIN;
1944 params.old_password.plaintext = oldpass;
1945 params.new_password.plaintext = newpass;
1946 params.flags = flags;
1948 wbc_status = wbcChangeUserPasswordEx(¶ms, &error, &reject_reason, &policy);
1949 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1950 user, "wbcChangeUserPasswordEx");
1952 if (WBC_ERROR_IS_OK(wbc_status)) {
1953 _pam_log(ctx, LOG_NOTICE,
1954 "user '%s' password changed", user);
1959 wbcFreeMemory(policy);
1963 for (i=0; i<ARRAY_SIZE(codes); i++) {
1965 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1971 if (!strcasecmp(error->nt_string,
1972 "NT_STATUS_PASSWORD_RESTRICTION")) {
1974 char *pwd_restriction_string = NULL;
1975 SMB_TIME_T min_pwd_age = 0;
1978 min_pwd_age = policy->min_passwordage;
1981 /* FIXME: avoid to send multiple PAM messages after another */
1982 switch (reject_reason) {
1985 case WBC_PWD_CHANGE_NO_ERROR:
1986 if ((min_pwd_age > 0) &&
1987 (pwd_last_set + min_pwd_age > time(NULL))) {
1988 PAM_WB_REMARK_DIRECT(ctx,
1989 "NT_STATUS_PWD_TOO_RECENT");
1992 case WBC_PWD_CHANGE_PASSWORD_TOO_SHORT:
1993 PAM_WB_REMARK_DIRECT(ctx,
1994 "NT_STATUS_PWD_TOO_SHORT");
1996 case WBC_PWD_CHANGE_PWD_IN_HISTORY:
1997 PAM_WB_REMARK_DIRECT(ctx,
1998 "NT_STATUS_PWD_HISTORY_CONFLICT");
2000 case WBC_PWD_CHANGE_NOT_COMPLEX:
2001 _make_remark(ctx, PAM_ERROR_MSG,
2002 _("Password does not meet "
2003 "complexity requirements"));
2006 _pam_log_debug(ctx, LOG_DEBUG,
2007 "unknown password change "
2008 "reject reason: %d",
2013 pwd_restriction_string =
2014 _pam_compose_pwd_restriction_string(ctx, policy);
2015 if (pwd_restriction_string) {
2016 _make_remark(ctx, PAM_ERROR_MSG,
2017 pwd_restriction_string);
2018 TALLOC_FREE(pwd_restriction_string);
2022 wbcFreeMemory(error);
2023 wbcFreeMemory(policy);
2029 * Checks if a user has an account
2032 * 1 = User not found
2036 static int valid_user(struct pwb_context *ctx,
2039 /* check not only if the user is available over NSS calls, also make
2040 * sure it's really a winbind user, this is important when stacking PAM
2041 * modules in the 'account' or 'password' facility. */
2044 struct passwd *pwd = NULL;
2045 struct passwd *wb_pwd = NULL;
2047 pwd = getpwnam(user);
2052 wbc_status = wbcGetpwnam(user, &wb_pwd);
2053 wbcFreeMemory(wb_pwd);
2054 if (!WBC_ERROR_IS_OK(wbc_status)) {
2055 _pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
2056 wbcErrorString(wbc_status));
2059 switch (wbc_status) {
2060 case WBC_ERR_UNKNOWN_USER:
2062 case WBC_ERR_SUCCESS:
2070 static char *_pam_delete(register char *xx)
2078 * obtain a password from the user
2081 static int _winbind_read_password(struct pwb_context *ctx,
2083 const char *comment,
2084 const char *prompt1,
2085 const char *prompt2,
2093 _pam_log(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
2096 * make sure nothing inappropriate gets returned
2099 *pass = token = NULL;
2102 * which authentication token are we getting?
2105 if (on(WINBIND__OLD_PASSWORD, ctrl)) {
2106 authtok_flag = PAM_OLDAUTHTOK;
2108 authtok_flag = PAM_AUTHTOK;
2112 * should we obtain the password from a PAM item ?
2115 if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
2116 on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2117 retval = _pam_get_item(ctx->pamh, authtok_flag, &item);
2118 if (retval != PAM_SUCCESS) {
2120 _pam_log(ctx, LOG_ALERT,
2121 "pam_get_item returned error "
2122 "to unix-read-password");
2124 } else if (item != NULL) { /* we have a password! */
2127 _pam_log(ctx, LOG_DEBUG,
2128 "pam_get_item returned a password");
2130 } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2131 return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
2132 } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
2133 && off(WINBIND__OLD_PASSWORD, ctrl)) {
2134 return PAM_AUTHTOK_RECOVER_ERR;
2138 * getting here implies we will have to get the password from the
2143 struct pam_message msg[3], *pmsg[3];
2144 struct pam_response *resp;
2147 /* prepare to converse */
2149 if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
2151 msg[0].msg_style = PAM_TEXT_INFO;
2152 msg[0].msg = discard_const_p(char, comment);
2159 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2160 msg[i++].msg = discard_const_p(char, prompt1);
2163 if (prompt2 != NULL) {
2165 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2166 msg[i++].msg = discard_const_p(char, prompt2);
2169 /* so call the conversation expecting i responses */
2171 retval = converse(ctx->pamh, i, pmsg, &resp);
2173 if (retval == PAM_SUCCESS) {
2174 retval = PAM_AUTHTOK_RECOVER_ERR;
2178 if (retval != PAM_SUCCESS) {
2179 _pam_drop_reply(resp, i);
2183 /* interpret the response */
2185 token = x_strdup(resp[i - replies].resp);
2187 _pam_log(ctx, LOG_NOTICE,
2188 "could not recover "
2189 "authentication token");
2190 retval = PAM_AUTHTOK_RECOVER_ERR;
2195 /* verify that password entered correctly */
2196 if (!resp[i - 1].resp ||
2197 strcmp(token, resp[i - 1].resp)) {
2198 _pam_delete(token); /* mistyped */
2199 retval = PAM_AUTHTOK_RECOVER_ERR;
2200 _make_remark(ctx, PAM_ERROR_MSG,
2206 * tidy up the conversation (resp_retcode) is ignored
2207 * -- what is it for anyway? AGM
2209 _pam_drop_reply(resp, i);
2213 if (retval != PAM_SUCCESS) {
2214 _pam_log_debug(ctx, LOG_DEBUG,
2215 "unable to obtain a password");
2218 /* 'token' is the entered password */
2220 /* we store this password as an item */
2222 retval = pam_set_item(ctx->pamh, authtok_flag, token);
2223 _pam_delete(token); /* clean it up */
2224 if (retval != PAM_SUCCESS ||
2225 (retval = _pam_get_item(ctx->pamh, authtok_flag, &item)) != PAM_SUCCESS) {
2227 _pam_log(ctx, LOG_CRIT, "error manipulating password");
2233 item = NULL; /* break link to password */
2238 static const char *get_conf_item_string(struct pwb_context *ctx,
2243 const char *parm_opt = NULL;
2245 if (!(ctx->ctrl & config_flag)) {
2249 /* let the pam opt take precedence over the pam_winbind.conf option */
2250 for (i=0; i<ctx->argc; i++) {
2252 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2255 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2256 _pam_log(ctx, LOG_INFO,
2257 "no \"=\" delimiter for \"%s\" found\n",
2261 _pam_log_debug(ctx, LOG_INFO,
2262 "PAM config: %s '%s'\n", item, p+1);
2270 key = talloc_asprintf(ctx, "global:%s", item);
2275 parm_opt = iniparser_getstr(ctx->dict, key);
2278 _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
2285 static int get_config_item_int(struct pwb_context *ctx,
2289 int i, parm_opt = -1;
2291 if (!(ctx->ctrl & config_flag)) {
2295 /* let the pam opt take precedence over the pam_winbind.conf option */
2296 for (i = 0; i < ctx->argc; i++) {
2298 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2301 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2302 _pam_log(ctx, LOG_INFO,
2303 "no \"=\" delimiter for \"%s\" found\n",
2307 parm_opt = atoi(p + 1);
2308 _pam_log_debug(ctx, LOG_INFO,
2309 "PAM config: %s '%d'\n",
2318 key = talloc_asprintf(ctx, "global:%s", item);
2323 parm_opt = iniparser_getint(ctx->dict, key, -1);
2326 _pam_log_debug(ctx, LOG_INFO,
2327 "CONFIG file: %s '%d'\n",
2334 static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
2336 return get_conf_item_string(ctx, "krb5_ccache_type",
2337 WINBIND_KRB5_CCACHE_TYPE);
2340 static const char *get_member_from_config(struct pwb_context *ctx)
2342 const char *ret = NULL;
2343 ret = get_conf_item_string(ctx, "require_membership_of",
2344 WINBIND_REQUIRED_MEMBERSHIP);
2348 return get_conf_item_string(ctx, "require-membership-of",
2349 WINBIND_REQUIRED_MEMBERSHIP);
2352 static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
2355 ret = get_config_item_int(ctx, "warn_pwd_expire",
2356 WINBIND_WARN_PWD_EXPIRE);
2357 /* no or broken setting */
2359 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
2365 * Retrieve the winbind separator.
2367 * @param ctx PAM winbind context.
2369 * @return string separator character. NULL on failure.
2372 static char winbind_get_separator(struct pwb_context *ctx)
2375 static struct wbcInterfaceDetails *details = NULL;
2377 wbc_status = wbcInterfaceDetails(&details);
2378 if (!WBC_ERROR_IS_OK(wbc_status)) {
2379 _pam_log(ctx, LOG_ERR,
2380 "Could not retrieve winbind interface details: %s",
2381 wbcErrorString(wbc_status));
2389 return details->winbind_separator;
2394 * Convert a upn to a name.
2396 * @param ctx PAM winbind context.
2397 * @param upn USer UPN to be trabslated.
2399 * @return converted name. NULL pointer on failure. Caller needs to free.
2402 static char* winbind_upn_to_username(struct pwb_context *ctx,
2406 wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
2407 struct wbcDomainSid sid;
2408 enum wbcSidType type;
2413 /* This cannot work when the winbind separator = @ */
2415 sep = winbind_get_separator(ctx);
2416 if (!sep || sep == '@') {
2420 name = talloc_strdup(ctx, upn);
2424 if ((p = strchr(name, '@')) != NULL) {
2429 /* Convert the UPN to a SID */
2431 wbc_status = wbcLookupName(domain, name, &sid, &type);
2432 if (!WBC_ERROR_IS_OK(wbc_status)) {
2436 /* Convert the the SID back to the sAMAccountName */
2438 wbc_status = wbcLookupSid(&sid, &domain, &name, &type);
2439 if (!WBC_ERROR_IS_OK(wbc_status)) {
2443 return talloc_asprintf(ctx, "%s\\%s", domain, name);
2446 static int _pam_delete_cred(pam_handle_t *pamh, int flags,
2447 int argc, const char **argv)
2449 int retval = PAM_SUCCESS;
2450 struct pwb_context *ctx = NULL;
2451 struct wbcLogoffUserParams logoff;
2452 struct wbcAuthErrorInfo *error = NULL;
2454 wbcErr wbc_status = WBC_ERR_SUCCESS;
2456 ZERO_STRUCT(logoff);
2458 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2463 _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
2465 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2467 /* destroy the ccache here */
2469 uint32_t wbc_flags = 0;
2470 const char *ccname = NULL;
2471 struct passwd *pwd = NULL;
2473 retval = pam_get_user(pamh, &user, _("Username: "));
2475 _pam_log(ctx, LOG_ERR,
2476 "could not identify user");
2481 _pam_log(ctx, LOG_ERR,
2482 "username was NULL!");
2483 retval = PAM_USER_UNKNOWN;
2487 _pam_log_debug(ctx, LOG_DEBUG,
2488 "username [%s] obtained", user);
2490 ccname = pam_getenv(pamh, "KRB5CCNAME");
2491 if (ccname == NULL) {
2492 _pam_log_debug(ctx, LOG_DEBUG,
2493 "user has no KRB5CCNAME environment");
2496 pwd = getpwnam(user);
2498 retval = PAM_USER_UNKNOWN;
2502 wbc_flags = WBFLAG_PAM_KRB5 |
2503 WBFLAG_PAM_CONTACT_TRUSTDOM;
2505 logoff.username = user;
2508 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2514 if (!WBC_ERROR_IS_OK(wbc_status)) {
2519 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2523 (uint8_t *)&wbc_flags,
2525 if (!WBC_ERROR_IS_OK(wbc_status)) {
2529 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2533 (uint8_t *)&pwd->pw_uid,
2534 sizeof(pwd->pw_uid));
2535 if (!WBC_ERROR_IS_OK(wbc_status)) {
2539 wbc_status = wbcLogoffUserEx(&logoff, &error);
2540 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2541 user, "wbcLogoffUser");
2542 wbcFreeMemory(error);
2543 wbcFreeMemory(logoff.blobs);
2544 logoff.blobs = NULL;
2546 if (!WBC_ERROR_IS_OK(wbc_status)) {
2547 _pam_log(ctx, LOG_INFO,
2548 "failed to logoff user %s: %s\n",
2549 user, wbcErrorString(wbc_status));
2555 wbcFreeMemory(logoff.blobs);
2558 if (!WBC_ERROR_IS_OK(wbc_status)) {
2559 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2560 user, "wbcLogoffUser");
2564 * Delete the krb5 ccname variable from the PAM environment
2565 * if it was set by winbind.
2567 if ((ctx->ctrl & WINBIND_KRB5_AUTH) && pam_getenv(pamh, "KRB5CCNAME")) {
2568 pam_putenv(pamh, "KRB5CCNAME");
2571 _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx, retval);
2579 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
2580 int argc, const char **argv)
2582 const char *username;
2583 const char *password;
2584 const char *member = NULL;
2585 const char *cctype = NULL;
2586 int warn_pwd_expire;
2587 int retval = PAM_AUTH_ERR;
2588 char *username_ret = NULL;
2589 char *new_authtok_required = NULL;
2590 char *real_username = NULL;
2591 struct pwb_context *ctx = NULL;
2593 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2598 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
2600 /* Get the username */
2601 retval = pam_get_user(pamh, &username, NULL);
2602 if ((retval != PAM_SUCCESS) || (!username)) {
2603 _pam_log_debug(ctx, LOG_DEBUG,
2604 "can not get the username");
2605 retval = PAM_SERVICE_ERR;
2611 /* Decode the user name since AIX does not support logn user
2612 names by default. The name is encoded as _#uid. */
2614 if (username[0] == '_') {
2615 uid_t id = atoi(&username[1]);
2616 struct passwd *pw = NULL;
2618 if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
2619 real_username = strdup(pw->pw_name);
2624 if (!real_username) {
2625 /* Just making a copy of the username we got from PAM */
2626 if ((real_username = strdup(username)) == NULL) {
2627 _pam_log_debug(ctx, LOG_DEBUG,
2628 "memory allocation failure when copying "
2630 retval = PAM_SERVICE_ERR;
2635 /* Maybe this was a UPN */
2637 if (strchr(real_username, '@') != NULL) {
2638 char *samaccountname = NULL;
2640 samaccountname = winbind_upn_to_username(ctx,
2642 if (samaccountname) {
2643 free(real_username);
2644 real_username = strdup(samaccountname);
2648 retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
2649 _("Password: "), NULL,
2652 if (retval != PAM_SUCCESS) {
2653 _pam_log(ctx, LOG_ERR,
2654 "Could not retrieve user's password");
2655 retval = PAM_AUTHTOK_ERR;
2659 /* Let's not give too much away in the log file */
2661 #ifdef DEBUG_PASSWORD
2662 _pam_log_debug(ctx, LOG_INFO,
2663 "Verify user '%s' with password '%s'",
2664 real_username, password);
2666 _pam_log_debug(ctx, LOG_INFO,
2667 "Verify user '%s'", real_username);
2670 member = get_member_from_config(ctx);
2671 cctype = get_krb5_cc_type_from_config(ctx);
2672 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2674 /* Now use the username to look up password */
2675 retval = winbind_auth_request(ctx, real_username, password,
2676 member, cctype, warn_pwd_expire,
2678 NULL, &username_ret);
2680 if (retval == PAM_NEW_AUTHTOK_REQD ||
2681 retval == PAM_AUTHTOK_EXPIRED) {
2683 char *new_authtok_required_during_auth = NULL;
2685 new_authtok_required = talloc_asprintf(NULL, "%d", retval);
2686 if (!new_authtok_required) {
2687 retval = PAM_BUF_ERR;
2691 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2692 new_authtok_required,
2693 _pam_winbind_cleanup_func);
2695 retval = PAM_SUCCESS;
2697 new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
2698 if (!new_authtok_required_during_auth) {
2699 retval = PAM_BUF_ERR;
2703 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2704 new_authtok_required_during_auth,
2705 _pam_winbind_cleanup_func);
2712 pam_set_item (pamh, PAM_USER, username_ret);
2713 _pam_log_debug(ctx, LOG_INFO,
2714 "Returned user was '%s'", username_ret);
2718 if (real_username) {
2719 free(real_username);
2722 if (!new_authtok_required) {
2723 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2726 if (retval != PAM_SUCCESS) {
2727 _pam_free_data_info3(pamh);
2730 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
2738 int pam_sm_setcred(pam_handle_t *pamh, int flags,
2739 int argc, const char **argv)
2741 int ret = PAM_SYSTEM_ERR;
2742 struct pwb_context *ctx = NULL;
2744 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2749 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
2751 switch (flags & ~PAM_SILENT) {
2753 case PAM_DELETE_CRED:
2754 ret = _pam_delete_cred(pamh, flags, argc, argv);
2756 case PAM_REFRESH_CRED:
2757 _pam_log_debug(ctx, LOG_WARNING,
2758 "PAM_REFRESH_CRED not implemented");
2761 case PAM_REINITIALIZE_CRED:
2762 _pam_log_debug(ctx, LOG_WARNING,
2763 "PAM_REINITIALIZE_CRED not implemented");
2766 case PAM_ESTABLISH_CRED:
2767 _pam_log_debug(ctx, LOG_WARNING,
2768 "PAM_ESTABLISH_CRED not implemented");
2772 ret = PAM_SYSTEM_ERR;
2778 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
2786 * Account management. We want to verify that the account exists
2787 * before returning PAM_SUCCESS
2790 int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2791 int argc, const char **argv)
2793 const char *username;
2794 int ret = PAM_USER_UNKNOWN;
2796 struct pwb_context *ctx = NULL;
2798 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2803 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
2806 /* Get the username */
2807 ret = pam_get_user(pamh, &username, NULL);
2808 if ((ret != PAM_SUCCESS) || (!username)) {
2809 _pam_log_debug(ctx, LOG_DEBUG,
2810 "can not get the username");
2811 ret = PAM_SERVICE_ERR;
2815 /* Verify the username */
2816 ret = valid_user(ctx, username);
2819 /* some sort of system error. The log was already printed */
2820 ret = PAM_SERVICE_ERR;
2823 /* the user does not exist */
2824 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
2826 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
2830 ret = PAM_USER_UNKNOWN;
2833 pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2834 (const void **)&tmp);
2836 ret = atoi((const char *)tmp);
2838 case PAM_AUTHTOK_EXPIRED:
2839 /* fall through, since new token is required in this case */
2840 case PAM_NEW_AUTHTOK_REQD:
2841 _pam_log(ctx, LOG_WARNING,
2842 "pam_sm_acct_mgmt success but %s is set",
2843 PAM_WINBIND_NEW_AUTHTOK_REQD);
2844 _pam_log(ctx, LOG_NOTICE,
2845 "user '%s' needs new password",
2847 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2848 ret = PAM_NEW_AUTHTOK_REQD;
2851 _pam_log(ctx, LOG_WARNING,
2852 "pam_sm_acct_mgmt success");
2853 _pam_log(ctx, LOG_NOTICE,
2854 "user '%s' granted access", username);
2860 /* Otherwise, the authentication looked good */
2861 _pam_log(ctx, LOG_NOTICE,
2862 "user '%s' granted access", username);
2866 /* we don't know anything about this return value */
2867 _pam_log(ctx, LOG_ERR,
2868 "internal module error (ret = %d, user = '%s')",
2870 ret = PAM_SERVICE_ERR;
2874 /* should not be reached */
2879 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
2887 int pam_sm_open_session(pam_handle_t *pamh, int flags,
2888 int argc, const char **argv)
2890 int ret = PAM_SUCCESS;
2891 struct pwb_context *ctx = NULL;
2893 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2898 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
2900 if (ctx->ctrl & WINBIND_MKHOMEDIR) {
2901 /* check and create homedir */
2902 ret = _pam_mkhomedir(ctx);
2905 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
2913 int pam_sm_close_session(pam_handle_t *pamh, int flags,
2914 int argc, const char **argv)
2916 int ret = PAM_SUCCESS;
2917 struct pwb_context *ctx = NULL;
2919 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2924 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
2927 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
2935 * evaluate whether we need to re-authenticate with kerberos after a
2938 * @param ctx PAM winbind context.
2939 * @param user The username
2941 * @return boolean Returns true if required, false if not.
2944 static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
2948 /* Make sure that we only do this if a) the chauthtok got initiated
2949 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2950 * later password change via the "passwd" command if done by the user
2952 * NB. If we login from gdm or xdm and the password expires,
2953 * we change the password, but there is no memory cache.
2954 * Thus, even for passthrough login, we should do the
2955 * authentication again to update memory cache.
2959 char *new_authtok_reqd_during_auth = NULL;
2960 struct passwd *pwd = NULL;
2962 _pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2963 &new_authtok_reqd_during_auth);
2964 pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2967 if (new_authtok_reqd_during_auth) {
2971 pwd = getpwnam(user);
2976 if (getuid() == pwd->pw_uid) {
2985 int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
2986 int argc, const char **argv)
2990 bool cached_login = false;
2992 /* <DO NOT free() THESE> */
2994 char *pass_old, *pass_new;
2995 /* </DO NOT free() THESE> */
3000 char *username_ret = NULL;
3001 struct wbcAuthErrorInfo *error = NULL;
3002 struct pwb_context *ctx = NULL;
3004 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
3009 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
3011 cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
3013 /* clearing offline bit for auth */
3014 ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
3017 * First get the name of a user
3019 ret = pam_get_user(pamh, &user, _("Username: "));
3021 _pam_log(ctx, LOG_ERR,
3022 "password - could not identify user");
3027 _pam_log(ctx, LOG_ERR, "username was NULL!");
3028 ret = PAM_USER_UNKNOWN;
3032 _pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
3034 /* check if this is really a user in winbindd, not only in NSS */
3035 ret = valid_user(ctx, user);
3038 ret = PAM_USER_UNKNOWN;
3041 ret = PAM_SYSTEM_ERR;
3048 * obtain and verify the current password (OLDAUTHTOK) for
3052 if (flags & PAM_PRELIM_CHECK) {
3053 time_t pwdlastset_prelim = 0;
3055 /* instruct user what is happening */
3057 #define greeting _("Changing password for")
3058 Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
3060 _pam_log(ctx, LOG_CRIT,
3061 "password - out of memory");
3067 lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
3068 ret = _winbind_read_password(ctx, lctrl,
3070 _("(current) NT password: "),
3072 (const char **) &pass_old);
3073 TALLOC_FREE(Announce);
3074 if (ret != PAM_SUCCESS) {
3075 _pam_log(ctx, LOG_NOTICE,
3076 "password - (old) token not obtained");
3080 /* verify that this is the password for this user */
3082 ret = winbind_auth_request(ctx, user, pass_old,
3085 &pwdlastset_prelim, NULL);
3087 if (ret != PAM_ACCT_EXPIRED &&
3088 ret != PAM_AUTHTOK_EXPIRED &&
3089 ret != PAM_NEW_AUTHTOK_REQD &&
3090 ret != PAM_SUCCESS) {
3095 pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3096 (void *)pwdlastset_prelim, NULL);
3098 ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
3099 (const void *) pass_old);
3101 if (ret != PAM_SUCCESS) {
3102 _pam_log(ctx, LOG_CRIT,
3103 "failed to set PAM_OLDAUTHTOK");
3105 } else if (flags & PAM_UPDATE_AUTHTOK) {
3107 time_t pwdlastset_update = 0;
3110 * obtain the proposed password
3114 * get the old token back.
3117 ret = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
3119 if (ret != PAM_SUCCESS) {
3120 _pam_log(ctx, LOG_NOTICE,
3121 "user not authenticated");
3125 lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
3127 if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
3128 lctrl |= WINBIND_USE_FIRST_PASS_ARG;
3131 ret = PAM_AUTHTOK_ERR;
3132 while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
3134 * use_authtok is to force the use of a previously entered
3135 * password -- needed for pluggable password strength checking
3138 ret = _winbind_read_password(ctx, lctrl,
3140 _("Enter new NT password: "),
3141 _("Retype new NT password: "),
3142 (const char **)&pass_new);
3144 if (ret != PAM_SUCCESS) {
3145 _pam_log_debug(ctx, LOG_ALERT,
3147 "new password not obtained");
3148 pass_old = NULL;/* tidy up */
3153 * At this point we know who the user is and what they
3154 * propose as their new password. Verify that the new
3155 * password is acceptable.
3158 if (pass_new[0] == '\0') {/* "\0" password = NULL */
3164 * By reaching here we have approved the passwords and must now
3165 * rebuild the password database file.
3167 _pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3168 &pwdlastset_update);
3171 * if cached creds were enabled, make sure to set the
3172 * WINBIND_CACHED_LOGIN bit here in order to have winbindd
3173 * update the cached creds storage - gd
3176 ctx->ctrl |= WINBIND_CACHED_LOGIN;
3179 ret = winbind_chauthtok_request(ctx, user, pass_old,
3180 pass_new, pwdlastset_update);
3182 pass_old = pass_new = NULL;
3186 if (_pam_require_krb5_auth_after_chauthtok(ctx, user)) {
3188 const char *member = NULL;
3189 const char *cctype = NULL;
3190 int warn_pwd_expire;
3191 struct wbcLogonUserInfo *info = NULL;
3192 struct wbcUserPasswordPolicyInfo *policy = NULL;
3194 member = get_member_from_config(ctx);
3195 cctype = get_krb5_cc_type_from_config(ctx);
3196 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
3198 /* Keep WINBIND_CACHED_LOGIN bit for
3199 * authentication after changing the password.
3200 * This will update the cached credentials in case
3201 * that winbindd_dual_pam_chauthtok() fails
3206 ret = winbind_auth_request(ctx, user, pass_new,
3208 &error, &info, &policy,
3209 NULL, &username_ret);
3210 pass_old = pass_new = NULL;
3212 if (ret == PAM_SUCCESS) {
3214 struct wbcAuthUserInfo *user_info = NULL;
3216 if (info && info->info) {
3217 user_info = info->info;
3220 /* warn a user if the password is about to
3222 _pam_warn_password_expiry(ctx, user_info, policy,
3226 /* set some info3 info for other modules in the
3228 _pam_set_data_info3(ctx, user_info);
3230 /* put krb5ccname into env */
3231 _pam_setup_krb5_env(ctx, info);
3234 pam_set_item(pamh, PAM_USER,
3236 _pam_log_debug(ctx, LOG_INFO,
3237 "Returned user was '%s'",
3244 if (info && info->blobs) {
3245 wbcFreeMemory(info->blobs);
3247 wbcFreeMemory(info);
3248 wbcFreeMemory(policy);
3253 ret = PAM_SERVICE_ERR;
3258 /* Deal with offline errors. */
3260 const char *codes[] = {
3261 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3262 "NT_STATUS_NO_LOGON_SERVERS",
3263 "NT_STATUS_ACCESS_DENIED"
3266 for (i=0; i<ARRAY_SIZE(codes); i++) {
3268 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
3274 wbcFreeMemory(error);
3276 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
3285 /* static module data */
3287 struct pam_module _pam_winbind_modstruct = {
3289 pam_sm_authenticate,
3292 pam_sm_open_session,
3293 pam_sm_close_session,
3300 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3301 * Copyright (c) Tim Potter <tpot@samba.org> 2000
3302 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3303 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3304 * Copyright (c) Jan Rêkorajski 1999.
3305 * Copyright (c) Andrew G. Morgan 1996-8.
3306 * Copyright (c) Alex O. Yuriev, 1996.
3307 * Copyright (c) Cristian Gafton 1996.
3308 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3310 * Redistribution and use in source and binary forms, with or without
3311 * modification, are permitted provided that the following conditions
3313 * 1. Redistributions of source code must retain the above copyright
3314 * notice, and the entire permission notice in its entirety,
3315 * including the disclaimer of warranties.
3316 * 2. Redistributions in binary form must reproduce the above copyright
3317 * notice, this list of conditions and the following disclaimer in the
3318 * documentation and/or other materials provided with the distribution.
3319 * 3. The name of the author may not be used to endorse or promote
3320 * products derived from this software without specific prior
3321 * written permission.
3323 * ALTERNATIVELY, this product may be distributed under the terms of
3324 * the GNU Public License, in which case the provisions of the GPL are
3325 * required INSTEAD OF the above restrictions. (This clause is
3326 * necessary due to a potential bad interaction between the GPL and
3327 * the restrictions contained in a BSD-style copyright.)
3329 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3330 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3331 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3332 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3333 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3334 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3335 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3336 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3337 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3338 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3339 * OF THE POSSIBILITY OF SUCH DAMAGE.