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 #if defined(HAVE_PAM_RADIO_TYPE)
811 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
813 struct pam_message msg, *pmsg;
814 struct pam_response *resp = NULL;
818 prompt = _("Do you want to change your password now?");
820 msg.msg_style = PAM_RADIO_TYPE;
822 ret = converse(ctx->pamh, 1, &pmsg, &resp);
824 if (ret == PAM_SUCCESS) {
825 _pam_log(ctx, LOG_CRIT, "pam_winbind: system error!\n");
829 if (ret != PAM_SUCCESS) {
832 _pam_log(ctx, LOG_CRIT, "Received [%s] reply from application.\n", resp->resp);
834 if (strcasecmp(resp->resp, "yes") == 0) {
838 _pam_drop_reply(resp, 1);
842 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
849 * send a password expiry message if required
851 * @param ctx PAM winbind context.
852 * @param next_change expected (calculated) next expiry date.
853 * @param already_expired pointer to a boolean to indicate if the password is
856 * @return boolean Returns true if message has been sent, false if not.
859 static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
863 bool *already_expired,
867 struct tm tm_now, tm_next_change;
871 if (already_expired) {
872 *already_expired = false;
879 if (next_change <= now) {
880 PAM_WB_REMARK_DIRECT(ctx, "NT_STATUS_PASSWORD_EXPIRED");
881 if (already_expired) {
882 *already_expired = true;
887 if ((next_change < 0) ||
888 (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
892 if ((localtime_r(&now, &tm_now) == NULL) ||
893 (localtime_r(&next_change, &tm_next_change) == NULL)) {
897 days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) -
898 (tm_now.tm_yday+tm_now.tm_year*365);
901 ret = _make_remark(ctx, PAM_TEXT_INFO,
902 _("Your password expires today.\n"));
905 * If change_pwd and already_expired is null.
906 * We are just sending a notification message.
907 * We don't expect any response in this case.
910 if (!change_pwd && !already_expired) {
915 * successfully sent the warning message.
916 * Give the user a chance to change pwd.
918 if (ret == PAM_SUCCESS) {
920 retval = _pam_winbind_change_pwd(ctx);
929 if (days > 0 && days < warn_pwd_expire) {
931 ret = _make_remark_format(ctx, PAM_TEXT_INFO,
932 _("Your password will expire in %d %s.\n"),
933 days, (days > 1) ? _("days"):_("day"));
935 * If change_pwd and already_expired is null.
936 * We are just sending a notification message.
937 * We don't expect any response in this case.
940 if (!change_pwd && !already_expired) {
945 * successfully sent the warning message.
946 * Give the user a chance to change pwd.
948 if (ret == PAM_SUCCESS) {
950 retval = _pam_winbind_change_pwd(ctx);
963 * Send a warning if the password expires in the near future
965 * @param ctx PAM winbind context.
966 * @param response The full authentication response structure.
967 * @param already_expired boolean, is the pwd already expired?
972 static void _pam_warn_password_expiry(struct pwb_context *ctx,
973 const struct wbcAuthUserInfo *info,
974 const struct wbcUserPasswordPolicyInfo *policy,
976 bool *already_expired,
979 time_t now = time(NULL);
980 time_t next_change = 0;
982 if (!info || !policy) {
986 if (already_expired) {
987 *already_expired = false;
994 /* accounts with WBC_ACB_PWNOEXP set never receive a warning */
995 if (info->acct_flags & WBC_ACB_PWNOEXP) {
999 /* no point in sending a warning if this is a grace logon */
1000 if (PAM_WB_GRACE_LOGON(info->user_flags)) {
1004 /* check if the info3 must change timestamp has been set */
1005 next_change = info->pass_must_change_time;
1007 if (_pam_send_password_expiry_message(ctx, next_change, now,
1014 /* now check for the global password policy */
1015 /* good catch from Ralf Haferkamp: an expiry of "never" is translated
1017 if ((policy->expire == (int64_t)-1) ||
1018 (policy->expire == 0)) {
1022 next_change = info->pass_last_set_time + policy->expire;
1024 if (_pam_send_password_expiry_message(ctx, next_change, now,
1031 /* no warning sent */
1034 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
1037 * Append a string, making sure not to overflow and to always return a
1038 * NULL-terminated string.
1040 * @param dest Destination string buffer (must already be NULL-terminated).
1041 * @param src Source string buffer.
1042 * @param dest_buffer_size Size of dest buffer in bytes.
1044 * @return false if dest buffer is not big enough (no bytes copied), true on
1048 static bool safe_append_string(char *dest,
1050 int dest_buffer_size)
1052 int dest_length = strlen(dest);
1053 int src_length = strlen(src);
1055 if (dest_length + src_length + 1 > dest_buffer_size) {
1059 memcpy(dest + dest_length, src, src_length + 1);
1064 * Convert a names into a SID string, appending it to a buffer.
1066 * @param ctx PAM winbind context.
1067 * @param user User in PAM request.
1068 * @param name Name to convert.
1069 * @param sid_list_buffer Where to append the string sid.
1070 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1072 * @return false on failure, true on success.
1074 static bool winbind_name_to_sid_string(struct pwb_context *ctx,
1077 char *sid_list_buffer,
1078 int sid_list_buffer_size)
1080 const char* sid_string = NULL;
1081 char *sid_str = NULL;
1084 if (IS_SID_STRING(name)) {
1088 struct wbcDomainSid sid;
1089 enum wbcSidType type;
1091 _pam_log_debug(ctx, LOG_DEBUG,
1092 "no sid given, looking up: %s\n", name);
1094 wbc_status = wbcLookupName("", name, &sid, &type);
1095 if (!WBC_ERROR_IS_OK(wbc_status)) {
1096 _pam_log(ctx, LOG_INFO,
1097 "could not lookup name: %s\n", name);
1101 wbc_status = wbcSidToString(&sid, &sid_str);
1102 if (!WBC_ERROR_IS_OK(wbc_status)) {
1106 sid_string = sid_str;
1109 if (!safe_append_string(sid_list_buffer, sid_string,
1110 sid_list_buffer_size)) {
1111 wbcFreeMemory(sid_str);
1115 wbcFreeMemory(sid_str);
1120 * Convert a list of names into a list of sids.
1122 * @param ctx PAM winbind context.
1123 * @param user User in PAM request.
1124 * @param name_list List of names or string sids, separated by commas.
1125 * @param sid_list_buffer Where to put the list of string sids.
1126 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1128 * @return false on failure, true on success.
1130 static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
1132 const char *name_list,
1133 char *sid_list_buffer,
1134 int sid_list_buffer_size)
1136 bool result = false;
1137 char *current_name = NULL;
1138 const char *search_location;
1142 if (sid_list_buffer_size > 0) {
1143 sid_list_buffer[0] = 0;
1146 search_location = name_list;
1147 while ((comma = strchr(search_location, ',')) != NULL) {
1148 current_name = strndup(search_location,
1149 comma - search_location);
1150 if (NULL == current_name) {
1154 if (!winbind_name_to_sid_string(ctx, user,
1157 sid_list_buffer_size)) {
1159 * If one group name failed, we must not fail
1160 * the authentication totally, continue with
1161 * the following group names. If user belongs to
1162 * one of the valid groups, we must allow it
1166 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1167 "check if group %s is valid group.", current_name,
1169 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1170 "to sid, please contact your administrator to see "
1171 "if group %s is valid."), current_name, current_name);
1172 SAFE_FREE(current_name);
1173 search_location = comma + 1;
1177 SAFE_FREE(current_name);
1179 if (!safe_append_string(sid_list_buffer, ",",
1180 sid_list_buffer_size)) {
1184 search_location = comma + 1;
1187 if (!winbind_name_to_sid_string(ctx, user, search_location,
1189 sid_list_buffer_size)) {
1190 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1191 "check if group %s is valid group.", search_location,
1193 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1194 "to sid, please contact your administrator to see "
1195 "if group %s is valid."), search_location, search_location);
1197 * The lookup of the last name failed..
1198 * It results in require_member_of_sid ends with ','
1199 * It is malformated parameter here, overwrite the last ','.
1201 len = strlen(sid_list_buffer);
1203 if (sid_list_buffer[len - 1] == ',') {
1204 sid_list_buffer[len - 1] = '\0';
1212 SAFE_FREE(current_name);
1217 * put krb5ccname variable into environment
1219 * @param ctx PAM winbind context.
1220 * @param krb5ccname env variable retrieved from winbindd.
1225 static void _pam_setup_krb5_env(struct pwb_context *ctx,
1226 struct wbcLogonUserInfo *info)
1231 const char *krb5ccname = NULL;
1233 if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
1241 for (i=0; i < info->num_blobs; i++) {
1242 if (strcasecmp(info->blobs[i].name, "krb5ccname") == 0) {
1243 krb5ccname = (const char *)info->blobs[i].blob.data;
1248 if (!krb5ccname || (strlen(krb5ccname) == 0)) {
1252 _pam_log_debug(ctx, LOG_DEBUG,
1253 "request returned KRB5CCNAME: %s", krb5ccname);
1255 if (snprintf(var, sizeof(var), "KRB5CCNAME=%s", krb5ccname) == -1) {
1259 ret = pam_putenv(ctx->pamh, var);
1261 _pam_log(ctx, LOG_ERR,
1262 "failed to set KRB5CCNAME to %s: %s",
1263 var, pam_strerror(ctx->pamh, ret));
1268 * Copy unix username if available (further processed in PAM).
1270 * @param ctx PAM winbind context
1271 * @param user_ret A pointer that holds a pointer to a string
1272 * @param unix_username A username
1277 static void _pam_setup_unix_username(struct pwb_context *ctx,
1279 struct wbcLogonUserInfo *info)
1281 const char *unix_username = NULL;
1284 if (!user_ret || !info) {
1288 for (i=0; i < info->num_blobs; i++) {
1289 if (strcasecmp(info->blobs[i].name, "unix_username") == 0) {
1290 unix_username = (const char *)info->blobs[i].blob.data;
1295 if (!unix_username || !unix_username[0]) {
1299 *user_ret = strdup(unix_username);
1303 * Set string into the PAM stack.
1305 * @param ctx PAM winbind context.
1306 * @param data_name Key name for pam_set_data.
1307 * @param value String value.
1312 static void _pam_set_data_string(struct pwb_context *ctx,
1313 const char *data_name,
1318 if (!data_name || !value || (strlen(data_name) == 0) ||
1319 (strlen(value) == 0)) {
1323 ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
1324 _pam_winbind_cleanup_func);
1326 _pam_log_debug(ctx, LOG_DEBUG,
1327 "Could not set data %s: %s\n",
1328 data_name, pam_strerror(ctx->pamh, ret));
1333 * Set info3 strings into the PAM stack.
1335 * @param ctx PAM winbind context.
1336 * @param data_name Key name for pam_set_data.
1337 * @param value String value.
1342 static void _pam_set_data_info3(struct pwb_context *ctx,
1343 const struct wbcAuthUserInfo *info)
1345 _pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
1346 info->home_directory);
1347 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
1348 info->logon_script);
1349 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
1350 info->logon_server);
1351 _pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
1352 info->profile_path);
1356 * Free info3 strings in the PAM stack.
1358 * @param pamh PAM handle
1363 static void _pam_free_data_info3(pam_handle_t *pamh)
1365 pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1366 pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1367 pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1368 pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1372 * Send PAM_ERROR_MSG for cached or grace logons.
1374 * @param ctx PAM winbind context.
1375 * @param username User in PAM request.
1376 * @param info3_user_flgs Info3 flags containing logon type bits.
1381 static void _pam_warn_logon_type(struct pwb_context *ctx,
1382 const char *username,
1383 uint32_t info3_user_flgs)
1385 /* inform about logon type */
1386 if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1388 _make_remark(ctx, PAM_ERROR_MSG,
1390 "Please change your password as soon you're "
1392 _pam_log_debug(ctx, LOG_DEBUG,
1393 "User %s logged on using grace logon\n",
1396 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1398 _make_remark(ctx, PAM_ERROR_MSG,
1399 _("Domain Controller unreachable, "
1400 "using cached credentials instead. "
1401 "Network resources may be unavailable"));
1402 _pam_log_debug(ctx, LOG_DEBUG,
1403 "User %s logged on using cached credentials\n",
1409 * Send PAM_ERROR_MSG for krb5 errors.
1411 * @param ctx PAM winbind context.
1412 * @param username User in PAM request.
1413 * @param info3_user_flgs Info3 flags containing logon type bits.
1418 static void _pam_warn_krb5_failure(struct pwb_context *ctx,
1419 const char *username,
1420 uint32_t info3_user_flgs)
1422 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1423 _make_remark(ctx, PAM_ERROR_MSG,
1424 _("Failed to establish your Kerberos Ticket cache "
1425 "due time differences\n"
1426 "with the domain controller. "
1427 "Please verify the system time.\n"));
1428 _pam_log_debug(ctx, LOG_DEBUG,
1429 "User %s: Clock skew when getting Krb5 TGT\n",
1434 static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
1435 const struct wbcAuthErrorInfo *e,
1436 const char *nt_status_string,
1439 const char *ntstatus = NULL;
1440 const char *error_string = NULL;
1442 if (!e || !pam_error) {
1446 ntstatus = e->nt_string;
1451 if (strcasecmp(ntstatus, nt_status_string) == 0) {
1453 error_string = _get_ntstatus_error_string(nt_status_string);
1455 _make_remark(ctx, PAM_ERROR_MSG, error_string);
1456 *pam_error = e->pam_error;
1460 if (e->display_string) {
1461 _make_remark(ctx, PAM_ERROR_MSG, e->display_string);
1462 *pam_error = e->pam_error;
1466 _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
1467 *pam_error = e->pam_error;
1476 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1478 * @param i The wbcUserPasswordPolicyInfo struct.
1480 * @return string (caller needs to talloc_free).
1483 static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
1484 struct wbcUserPasswordPolicyInfo *i)
1492 str = talloc_asprintf(ctx, _("Your password "));
1497 if (i->min_length_password > 0) {
1498 str = talloc_asprintf_append(str,
1499 _("must be at least %d characters; "),
1500 i->min_length_password);
1506 if (i->password_history > 0) {
1507 str = talloc_asprintf_append(str,
1508 _("cannot repeat any of your previous %d "
1510 i->password_history);
1516 if (i->password_properties & WBC_DOMAIN_PASSWORD_COMPLEX) {
1517 str = talloc_asprintf_append(str,
1518 _("must contain capitals, numerals "
1520 "and cannot contain your account "
1527 str = talloc_asprintf_append(str,
1528 _("Please type a different password. "
1529 "Type a password which meets these requirements in "
1530 "both text boxes."));
1542 static int _pam_create_homedir(struct pwb_context *ctx,
1543 const char *dirname,
1548 if (stat(dirname, &sbuf) == 0) {
1552 if (mkdir(dirname, mode) != 0) {
1554 _make_remark_format(ctx, PAM_TEXT_INFO,
1555 _("Creating directory: %s failed: %s"),
1556 dirname, strerror(errno));
1557 _pam_log(ctx, LOG_ERR, "could not create dir: %s (%s)",
1558 dirname, strerror(errno));
1559 return PAM_PERM_DENIED;
1565 static int _pam_chown_homedir(struct pwb_context *ctx,
1566 const char *dirname,
1570 if (chown(dirname, uid, gid) != 0) {
1571 _pam_log(ctx, LOG_ERR, "failed to chown user homedir: %s (%s)",
1572 dirname, strerror(errno));
1573 return PAM_PERM_DENIED;
1579 static int _pam_mkhomedir(struct pwb_context *ctx)
1581 struct passwd *pwd = NULL;
1583 char *create_dir = NULL;
1584 char *user_dir = NULL;
1586 const char *username;
1588 char *safe_ptr = NULL;
1591 /* Get the username */
1592 ret = pam_get_user(ctx->pamh, &username, NULL);
1593 if ((ret != PAM_SUCCESS) || (!username)) {
1594 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1595 return PAM_SERVICE_ERR;
1598 pwd = getpwnam(username);
1600 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1601 return PAM_USER_UNKNOWN;
1603 _pam_log_debug(ctx, LOG_DEBUG, "homedir is: %s", pwd->pw_dir);
1605 ret = _pam_create_homedir(ctx, pwd->pw_dir, 0700);
1606 if (ret == PAM_SUCCESS) {
1607 ret = _pam_chown_homedir(ctx, pwd->pw_dir,
1612 if (ret == PAM_SUCCESS) {
1616 /* maybe we need to create parent dirs */
1617 create_dir = talloc_strdup(ctx, "/");
1622 /* find final directory */
1623 user_dir = strrchr(pwd->pw_dir, '/');
1629 _pam_log(ctx, LOG_DEBUG, "final directory: %s", user_dir);
1633 while ((token = strtok_r(p, "/", &safe_ptr)) != NULL) {
1639 _pam_log_debug(ctx, LOG_DEBUG, "token is %s", token);
1641 create_dir = talloc_asprintf_append(create_dir, "%s/", token);
1645 _pam_log_debug(ctx, LOG_DEBUG, "current_dir is %s", create_dir);
1647 if (strcmp(token, user_dir) == 0) {
1648 _pam_log_debug(ctx, LOG_DEBUG, "assuming last directory: %s", token);
1652 ret = _pam_create_homedir(ctx, create_dir, mode);
1658 return _pam_chown_homedir(ctx, create_dir,
1663 /* talk to winbindd */
1664 static int winbind_auth_request(struct pwb_context *ctx,
1669 const int warn_pwd_expire,
1670 struct wbcAuthErrorInfo **p_error,
1671 struct wbcLogonUserInfo **p_info,
1672 struct wbcUserPasswordPolicyInfo **p_policy,
1673 time_t *pwd_last_set,
1678 struct wbcLogonUserParams logon;
1679 char membership_of[1024];
1680 uid_t user_uid = -1;
1681 uint32_t flags = WBFLAG_PAM_INFO3_TEXT |
1682 WBFLAG_PAM_GET_PWD_POLICY;
1684 struct wbcLogonUserInfo *info = NULL;
1685 struct wbcAuthUserInfo *user_info = NULL;
1686 struct wbcAuthErrorInfo *error = NULL;
1687 struct wbcUserPasswordPolicyInfo *policy = NULL;
1689 int ret = PAM_AUTH_ERR;
1691 const char *codes[] = {
1692 "NT_STATUS_PASSWORD_EXPIRED",
1693 "NT_STATUS_PASSWORD_MUST_CHANGE",
1694 "NT_STATUS_INVALID_WORKSTATION",
1695 "NT_STATUS_INVALID_LOGON_HOURS",
1696 "NT_STATUS_ACCOUNT_EXPIRED",
1697 "NT_STATUS_ACCOUNT_DISABLED",
1698 "NT_STATUS_ACCOUNT_LOCKED_OUT",
1699 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1700 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1701 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1702 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1703 "NT_STATUS_NO_LOGON_SERVERS",
1704 "NT_STATUS_WRONG_PASSWORD",
1705 "NT_STATUS_ACCESS_DENIED"
1712 /* Krb5 auth always has to go against the KDC of the user's realm */
1714 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1715 flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
1718 if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1719 struct passwd *pwd = NULL;
1721 pwd = getpwnam(user);
1723 return PAM_USER_UNKNOWN;
1725 user_uid = pwd->pw_uid;
1728 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1730 _pam_log_debug(ctx, LOG_DEBUG,
1731 "enabling krb5 login flag\n");
1733 flags |= WBFLAG_PAM_KRB5 |
1734 WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1737 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1738 _pam_log_debug(ctx, LOG_DEBUG,
1739 "enabling cached login flag\n");
1740 flags |= WBFLAG_PAM_CACHED_LOGIN;
1745 flags |= WBFLAG_PAM_UNIX_NAME;
1748 if (cctype != NULL) {
1749 _pam_log_debug(ctx, LOG_DEBUG,
1750 "enabling request for a %s krb5 ccache\n",
1754 if (member != NULL) {
1756 ZERO_STRUCT(membership_of);
1758 if (!winbind_name_list_to_sid_string_list(ctx, user, member,
1760 sizeof(membership_of))) {
1761 _pam_log_debug(ctx, LOG_ERR,
1762 "failed to serialize membership of sid "
1763 "\"%s\"\n", member);
1764 return PAM_AUTH_ERR;
1770 logon.username = user;
1771 logon.password = pass;
1774 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1780 if (!WBC_ERROR_IS_OK(wbc_status)) {
1785 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1791 if (!WBC_ERROR_IS_OK(wbc_status)) {
1795 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1799 (uint8_t *)&user_uid,
1801 if (!WBC_ERROR_IS_OK(wbc_status)) {
1806 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1810 (uint8_t *)membership_of,
1811 sizeof(membership_of));
1812 if (!WBC_ERROR_IS_OK(wbc_status)) {
1817 wbc_status = wbcLogonUser(&logon, &info, &error, &policy);
1818 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1819 user, "wbcLogonUser");
1820 wbcFreeMemory(logon.blobs);
1823 if (info && info->info) {
1824 user_info = info->info;
1827 if (pwd_last_set && user_info) {
1828 *pwd_last_set = user_info->pass_last_set_time;
1831 if (p_info && info) {
1835 if (p_policy && policy) {
1839 if (p_error && error) {
1840 /* We want to process the error in the caller. */
1845 for (i=0; i<ARRAY_SIZE(codes); i++) {
1847 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1853 if ((ret == PAM_SUCCESS) && user_info && policy && info) {
1855 bool already_expired = false;
1856 bool change_pwd = false;
1858 /* warn a user if the password is about to expire soon */
1859 _pam_warn_password_expiry(ctx, user_info, policy,
1864 if (already_expired == true) {
1866 SMB_TIME_T last_set = user_info->pass_last_set_time;
1868 _pam_log_debug(ctx, LOG_DEBUG,
1869 "Password has expired "
1870 "(Password was last set: %lld, "
1871 "the policy says it should expire here "
1872 "%lld (now it's: %ld))\n",
1873 (long long int)last_set,
1874 (long long int)last_set +
1878 return PAM_AUTHTOK_EXPIRED;
1882 ret = PAM_NEW_AUTHTOK_REQD;
1886 /* inform about logon type */
1887 _pam_warn_logon_type(ctx, user, user_info->user_flags);
1889 /* inform about krb5 failures */
1890 _pam_warn_krb5_failure(ctx, user, user_info->user_flags);
1892 /* set some info3 info for other modules in the stack */
1893 _pam_set_data_info3(ctx, user_info);
1895 /* put krb5ccname into env */
1896 _pam_setup_krb5_env(ctx, info);
1898 /* If winbindd returned a username, return the pointer to it
1900 _pam_setup_unix_username(ctx, user_ret, info);
1905 wbcFreeMemory(logon.blobs);
1907 if (info && info->blobs && !p_info) {
1908 wbcFreeMemory(info->blobs);
1910 if (error && !p_error) {
1911 wbcFreeMemory(error);
1913 if (info && !p_info) {
1914 wbcFreeMemory(info);
1916 if (policy && !p_policy) {
1917 wbcFreeMemory(policy);
1923 /* talk to winbindd */
1924 static int winbind_chauthtok_request(struct pwb_context *ctx,
1926 const char *oldpass,
1927 const char *newpass,
1928 time_t pwd_last_set)
1931 struct wbcChangePasswordParams params;
1932 struct wbcAuthErrorInfo *error = NULL;
1933 struct wbcUserPasswordPolicyInfo *policy = NULL;
1934 enum wbcPasswordChangeRejectReason reject_reason = -1;
1938 const char *codes[] = {
1939 "NT_STATUS_BACKUP_CONTROLLER",
1940 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1941 "NT_STATUS_NO_LOGON_SERVERS",
1942 "NT_STATUS_ACCESS_DENIED",
1943 "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1944 "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1945 "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1947 int ret = PAM_AUTH_ERR;
1949 ZERO_STRUCT(params);
1951 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1952 flags |= WBFLAG_PAM_KRB5 |
1953 WBFLAG_PAM_CONTACT_TRUSTDOM;
1956 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1957 flags |= WBFLAG_PAM_CACHED_LOGIN;
1960 params.account_name = user;
1961 params.level = WBC_AUTH_USER_LEVEL_PLAIN;
1962 params.old_password.plaintext = oldpass;
1963 params.new_password.plaintext = newpass;
1964 params.flags = flags;
1966 wbc_status = wbcChangeUserPasswordEx(¶ms, &error, &reject_reason, &policy);
1967 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1968 user, "wbcChangeUserPasswordEx");
1970 if (WBC_ERROR_IS_OK(wbc_status)) {
1971 _pam_log(ctx, LOG_NOTICE,
1972 "user '%s' password changed", user);
1977 wbcFreeMemory(policy);
1981 for (i=0; i<ARRAY_SIZE(codes); i++) {
1983 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1989 if (!strcasecmp(error->nt_string,
1990 "NT_STATUS_PASSWORD_RESTRICTION")) {
1992 char *pwd_restriction_string = NULL;
1993 SMB_TIME_T min_pwd_age = 0;
1996 min_pwd_age = policy->min_passwordage;
1999 /* FIXME: avoid to send multiple PAM messages after another */
2000 switch (reject_reason) {
2003 case WBC_PWD_CHANGE_NO_ERROR:
2004 if ((min_pwd_age > 0) &&
2005 (pwd_last_set + min_pwd_age > time(NULL))) {
2006 PAM_WB_REMARK_DIRECT(ctx,
2007 "NT_STATUS_PWD_TOO_RECENT");
2010 case WBC_PWD_CHANGE_PASSWORD_TOO_SHORT:
2011 PAM_WB_REMARK_DIRECT(ctx,
2012 "NT_STATUS_PWD_TOO_SHORT");
2014 case WBC_PWD_CHANGE_PWD_IN_HISTORY:
2015 PAM_WB_REMARK_DIRECT(ctx,
2016 "NT_STATUS_PWD_HISTORY_CONFLICT");
2018 case WBC_PWD_CHANGE_NOT_COMPLEX:
2019 _make_remark(ctx, PAM_ERROR_MSG,
2020 _("Password does not meet "
2021 "complexity requirements"));
2024 _pam_log_debug(ctx, LOG_DEBUG,
2025 "unknown password change "
2026 "reject reason: %d",
2031 pwd_restriction_string =
2032 _pam_compose_pwd_restriction_string(ctx, policy);
2033 if (pwd_restriction_string) {
2034 _make_remark(ctx, PAM_ERROR_MSG,
2035 pwd_restriction_string);
2036 TALLOC_FREE(pwd_restriction_string);
2040 wbcFreeMemory(error);
2041 wbcFreeMemory(policy);
2047 * Checks if a user has an account
2050 * 1 = User not found
2054 static int valid_user(struct pwb_context *ctx,
2057 /* check not only if the user is available over NSS calls, also make
2058 * sure it's really a winbind user, this is important when stacking PAM
2059 * modules in the 'account' or 'password' facility. */
2062 struct passwd *pwd = NULL;
2063 struct passwd *wb_pwd = NULL;
2065 pwd = getpwnam(user);
2070 wbc_status = wbcGetpwnam(user, &wb_pwd);
2071 wbcFreeMemory(wb_pwd);
2072 if (!WBC_ERROR_IS_OK(wbc_status)) {
2073 _pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
2074 wbcErrorString(wbc_status));
2077 switch (wbc_status) {
2078 case WBC_ERR_UNKNOWN_USER:
2080 case WBC_ERR_SUCCESS:
2088 static char *_pam_delete(register char *xx)
2096 * obtain a password from the user
2099 static int _winbind_read_password(struct pwb_context *ctx,
2101 const char *comment,
2102 const char *prompt1,
2103 const char *prompt2,
2111 _pam_log(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
2114 * make sure nothing inappropriate gets returned
2117 *pass = token = NULL;
2120 * which authentication token are we getting?
2123 if (on(WINBIND__OLD_PASSWORD, ctrl)) {
2124 authtok_flag = PAM_OLDAUTHTOK;
2126 authtok_flag = PAM_AUTHTOK;
2130 * should we obtain the password from a PAM item ?
2133 if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
2134 on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2135 retval = _pam_get_item(ctx->pamh, authtok_flag, &item);
2136 if (retval != PAM_SUCCESS) {
2138 _pam_log(ctx, LOG_ALERT,
2139 "pam_get_item returned error "
2140 "to unix-read-password");
2142 } else if (item != NULL) { /* we have a password! */
2145 _pam_log(ctx, LOG_DEBUG,
2146 "pam_get_item returned a password");
2148 } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2149 return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
2150 } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
2151 && off(WINBIND__OLD_PASSWORD, ctrl)) {
2152 return PAM_AUTHTOK_RECOVER_ERR;
2156 * getting here implies we will have to get the password from the
2161 struct pam_message msg[3], *pmsg[3];
2162 struct pam_response *resp;
2165 /* prepare to converse */
2167 if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
2169 msg[0].msg_style = PAM_TEXT_INFO;
2170 msg[0].msg = discard_const_p(char, comment);
2177 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2178 msg[i++].msg = discard_const_p(char, prompt1);
2181 if (prompt2 != NULL) {
2183 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2184 msg[i++].msg = discard_const_p(char, prompt2);
2187 /* so call the conversation expecting i responses */
2189 retval = converse(ctx->pamh, i, pmsg, &resp);
2191 if (retval == PAM_SUCCESS) {
2192 retval = PAM_AUTHTOK_RECOVER_ERR;
2196 if (retval != PAM_SUCCESS) {
2197 _pam_drop_reply(resp, i);
2201 /* interpret the response */
2203 token = x_strdup(resp[i - replies].resp);
2205 _pam_log(ctx, LOG_NOTICE,
2206 "could not recover "
2207 "authentication token");
2208 retval = PAM_AUTHTOK_RECOVER_ERR;
2213 /* verify that password entered correctly */
2214 if (!resp[i - 1].resp ||
2215 strcmp(token, resp[i - 1].resp)) {
2216 _pam_delete(token); /* mistyped */
2217 retval = PAM_AUTHTOK_RECOVER_ERR;
2218 _make_remark(ctx, PAM_ERROR_MSG,
2224 * tidy up the conversation (resp_retcode) is ignored
2225 * -- what is it for anyway? AGM
2227 _pam_drop_reply(resp, i);
2231 if (retval != PAM_SUCCESS) {
2232 _pam_log_debug(ctx, LOG_DEBUG,
2233 "unable to obtain a password");
2236 /* 'token' is the entered password */
2238 /* we store this password as an item */
2240 retval = pam_set_item(ctx->pamh, authtok_flag, token);
2241 _pam_delete(token); /* clean it up */
2242 if (retval != PAM_SUCCESS ||
2243 (retval = _pam_get_item(ctx->pamh, authtok_flag, &item)) != PAM_SUCCESS) {
2245 _pam_log(ctx, LOG_CRIT, "error manipulating password");
2251 item = NULL; /* break link to password */
2256 static const char *get_conf_item_string(struct pwb_context *ctx,
2261 const char *parm_opt = NULL;
2263 if (!(ctx->ctrl & config_flag)) {
2267 /* let the pam opt take precedence over the pam_winbind.conf option */
2268 for (i=0; i<ctx->argc; i++) {
2270 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2273 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2274 _pam_log(ctx, LOG_INFO,
2275 "no \"=\" delimiter for \"%s\" found\n",
2279 _pam_log_debug(ctx, LOG_INFO,
2280 "PAM config: %s '%s'\n", item, p+1);
2288 key = talloc_asprintf(ctx, "global:%s", item);
2293 parm_opt = iniparser_getstr(ctx->dict, key);
2296 _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
2303 static int get_config_item_int(struct pwb_context *ctx,
2307 int i, parm_opt = -1;
2309 if (!(ctx->ctrl & config_flag)) {
2313 /* let the pam opt take precedence over the pam_winbind.conf option */
2314 for (i = 0; i < ctx->argc; i++) {
2316 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2319 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2320 _pam_log(ctx, LOG_INFO,
2321 "no \"=\" delimiter for \"%s\" found\n",
2325 parm_opt = atoi(p + 1);
2326 _pam_log_debug(ctx, LOG_INFO,
2327 "PAM config: %s '%d'\n",
2336 key = talloc_asprintf(ctx, "global:%s", item);
2341 parm_opt = iniparser_getint(ctx->dict, key, -1);
2344 _pam_log_debug(ctx, LOG_INFO,
2345 "CONFIG file: %s '%d'\n",
2352 static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
2354 return get_conf_item_string(ctx, "krb5_ccache_type",
2355 WINBIND_KRB5_CCACHE_TYPE);
2358 static const char *get_member_from_config(struct pwb_context *ctx)
2360 const char *ret = NULL;
2361 ret = get_conf_item_string(ctx, "require_membership_of",
2362 WINBIND_REQUIRED_MEMBERSHIP);
2366 return get_conf_item_string(ctx, "require-membership-of",
2367 WINBIND_REQUIRED_MEMBERSHIP);
2370 static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
2373 ret = get_config_item_int(ctx, "warn_pwd_expire",
2374 WINBIND_WARN_PWD_EXPIRE);
2375 /* no or broken setting */
2377 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
2383 * Retrieve the winbind separator.
2385 * @param ctx PAM winbind context.
2387 * @return string separator character. NULL on failure.
2390 static char winbind_get_separator(struct pwb_context *ctx)
2393 static struct wbcInterfaceDetails *details = NULL;
2395 wbc_status = wbcInterfaceDetails(&details);
2396 if (!WBC_ERROR_IS_OK(wbc_status)) {
2397 _pam_log(ctx, LOG_ERR,
2398 "Could not retrieve winbind interface details: %s",
2399 wbcErrorString(wbc_status));
2407 return details->winbind_separator;
2412 * Convert a upn to a name.
2414 * @param ctx PAM winbind context.
2415 * @param upn USer UPN to be trabslated.
2417 * @return converted name. NULL pointer on failure. Caller needs to free.
2420 static char* winbind_upn_to_username(struct pwb_context *ctx,
2424 wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
2425 struct wbcDomainSid sid;
2426 enum wbcSidType type;
2431 /* This cannot work when the winbind separator = @ */
2433 sep = winbind_get_separator(ctx);
2434 if (!sep || sep == '@') {
2438 name = talloc_strdup(ctx, upn);
2442 if ((p = strchr(name, '@')) != NULL) {
2447 /* Convert the UPN to a SID */
2449 wbc_status = wbcLookupName(domain, name, &sid, &type);
2450 if (!WBC_ERROR_IS_OK(wbc_status)) {
2454 /* Convert the the SID back to the sAMAccountName */
2456 wbc_status = wbcLookupSid(&sid, &domain, &name, &type);
2457 if (!WBC_ERROR_IS_OK(wbc_status)) {
2461 return talloc_asprintf(ctx, "%s\\%s", domain, name);
2464 static int _pam_delete_cred(pam_handle_t *pamh, int flags,
2465 int argc, const char **argv)
2467 int retval = PAM_SUCCESS;
2468 struct pwb_context *ctx = NULL;
2469 struct wbcLogoffUserParams logoff;
2470 struct wbcAuthErrorInfo *error = NULL;
2472 wbcErr wbc_status = WBC_ERR_SUCCESS;
2474 ZERO_STRUCT(logoff);
2476 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2481 _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
2483 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2485 /* destroy the ccache here */
2487 uint32_t wbc_flags = 0;
2488 const char *ccname = NULL;
2489 struct passwd *pwd = NULL;
2491 retval = pam_get_user(pamh, &user, _("Username: "));
2493 _pam_log(ctx, LOG_ERR,
2494 "could not identify user");
2499 _pam_log(ctx, LOG_ERR,
2500 "username was NULL!");
2501 retval = PAM_USER_UNKNOWN;
2505 _pam_log_debug(ctx, LOG_DEBUG,
2506 "username [%s] obtained", user);
2508 ccname = pam_getenv(pamh, "KRB5CCNAME");
2509 if (ccname == NULL) {
2510 _pam_log_debug(ctx, LOG_DEBUG,
2511 "user has no KRB5CCNAME environment");
2514 pwd = getpwnam(user);
2516 retval = PAM_USER_UNKNOWN;
2520 wbc_flags = WBFLAG_PAM_KRB5 |
2521 WBFLAG_PAM_CONTACT_TRUSTDOM;
2523 logoff.username = user;
2526 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2532 if (!WBC_ERROR_IS_OK(wbc_status)) {
2537 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2541 (uint8_t *)&wbc_flags,
2543 if (!WBC_ERROR_IS_OK(wbc_status)) {
2547 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2551 (uint8_t *)&pwd->pw_uid,
2552 sizeof(pwd->pw_uid));
2553 if (!WBC_ERROR_IS_OK(wbc_status)) {
2557 wbc_status = wbcLogoffUserEx(&logoff, &error);
2558 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2559 user, "wbcLogoffUser");
2560 wbcFreeMemory(error);
2561 wbcFreeMemory(logoff.blobs);
2562 logoff.blobs = NULL;
2564 if (!WBC_ERROR_IS_OK(wbc_status)) {
2565 _pam_log(ctx, LOG_INFO,
2566 "failed to logoff user %s: %s\n",
2567 user, wbcErrorString(wbc_status));
2573 wbcFreeMemory(logoff.blobs);
2576 if (!WBC_ERROR_IS_OK(wbc_status)) {
2577 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2578 user, "wbcLogoffUser");
2582 * Delete the krb5 ccname variable from the PAM environment
2583 * if it was set by winbind.
2585 if ((ctx->ctrl & WINBIND_KRB5_AUTH) && pam_getenv(pamh, "KRB5CCNAME")) {
2586 pam_putenv(pamh, "KRB5CCNAME");
2589 _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx, retval);
2597 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
2598 int argc, const char **argv)
2600 const char *username;
2601 const char *password;
2602 const char *member = NULL;
2603 const char *cctype = NULL;
2604 int warn_pwd_expire;
2605 int retval = PAM_AUTH_ERR;
2606 char *username_ret = NULL;
2607 char *new_authtok_required = NULL;
2608 char *real_username = NULL;
2609 struct pwb_context *ctx = NULL;
2611 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2616 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
2618 /* Get the username */
2619 retval = pam_get_user(pamh, &username, NULL);
2620 if ((retval != PAM_SUCCESS) || (!username)) {
2621 _pam_log_debug(ctx, LOG_DEBUG,
2622 "can not get the username");
2623 retval = PAM_SERVICE_ERR;
2629 /* Decode the user name since AIX does not support logn user
2630 names by default. The name is encoded as _#uid. */
2632 if (username[0] == '_') {
2633 uid_t id = atoi(&username[1]);
2634 struct passwd *pw = NULL;
2636 if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
2637 real_username = strdup(pw->pw_name);
2642 if (!real_username) {
2643 /* Just making a copy of the username we got from PAM */
2644 if ((real_username = strdup(username)) == NULL) {
2645 _pam_log_debug(ctx, LOG_DEBUG,
2646 "memory allocation failure when copying "
2648 retval = PAM_SERVICE_ERR;
2653 /* Maybe this was a UPN */
2655 if (strchr(real_username, '@') != NULL) {
2656 char *samaccountname = NULL;
2658 samaccountname = winbind_upn_to_username(ctx,
2660 if (samaccountname) {
2661 free(real_username);
2662 real_username = strdup(samaccountname);
2666 retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
2667 _("Password: "), NULL,
2670 if (retval != PAM_SUCCESS) {
2671 _pam_log(ctx, LOG_ERR,
2672 "Could not retrieve user's password");
2673 retval = PAM_AUTHTOK_ERR;
2677 /* Let's not give too much away in the log file */
2679 #ifdef DEBUG_PASSWORD
2680 _pam_log_debug(ctx, LOG_INFO,
2681 "Verify user '%s' with password '%s'",
2682 real_username, password);
2684 _pam_log_debug(ctx, LOG_INFO,
2685 "Verify user '%s'", real_username);
2688 member = get_member_from_config(ctx);
2689 cctype = get_krb5_cc_type_from_config(ctx);
2690 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2692 /* Now use the username to look up password */
2693 retval = winbind_auth_request(ctx, real_username, password,
2694 member, cctype, warn_pwd_expire,
2696 NULL, &username_ret);
2698 if (retval == PAM_NEW_AUTHTOK_REQD ||
2699 retval == PAM_AUTHTOK_EXPIRED) {
2701 char *new_authtok_required_during_auth = NULL;
2703 new_authtok_required = talloc_asprintf(NULL, "%d", retval);
2704 if (!new_authtok_required) {
2705 retval = PAM_BUF_ERR;
2709 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2710 new_authtok_required,
2711 _pam_winbind_cleanup_func);
2713 retval = PAM_SUCCESS;
2715 new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
2716 if (!new_authtok_required_during_auth) {
2717 retval = PAM_BUF_ERR;
2721 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2722 new_authtok_required_during_auth,
2723 _pam_winbind_cleanup_func);
2730 pam_set_item (pamh, PAM_USER, username_ret);
2731 _pam_log_debug(ctx, LOG_INFO,
2732 "Returned user was '%s'", username_ret);
2736 if (real_username) {
2737 free(real_username);
2740 if (!new_authtok_required) {
2741 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2744 if (retval != PAM_SUCCESS) {
2745 _pam_free_data_info3(pamh);
2748 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
2756 int pam_sm_setcred(pam_handle_t *pamh, int flags,
2757 int argc, const char **argv)
2759 int ret = PAM_SYSTEM_ERR;
2760 struct pwb_context *ctx = NULL;
2762 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2767 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
2769 switch (flags & ~PAM_SILENT) {
2771 case PAM_DELETE_CRED:
2772 ret = _pam_delete_cred(pamh, flags, argc, argv);
2774 case PAM_REFRESH_CRED:
2775 _pam_log_debug(ctx, LOG_WARNING,
2776 "PAM_REFRESH_CRED not implemented");
2779 case PAM_REINITIALIZE_CRED:
2780 _pam_log_debug(ctx, LOG_WARNING,
2781 "PAM_REINITIALIZE_CRED not implemented");
2784 case PAM_ESTABLISH_CRED:
2785 _pam_log_debug(ctx, LOG_WARNING,
2786 "PAM_ESTABLISH_CRED not implemented");
2790 ret = PAM_SYSTEM_ERR;
2796 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
2804 * Account management. We want to verify that the account exists
2805 * before returning PAM_SUCCESS
2808 int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2809 int argc, const char **argv)
2811 const char *username;
2812 int ret = PAM_USER_UNKNOWN;
2814 struct pwb_context *ctx = NULL;
2816 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2821 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
2824 /* Get the username */
2825 ret = pam_get_user(pamh, &username, NULL);
2826 if ((ret != PAM_SUCCESS) || (!username)) {
2827 _pam_log_debug(ctx, LOG_DEBUG,
2828 "can not get the username");
2829 ret = PAM_SERVICE_ERR;
2833 /* Verify the username */
2834 ret = valid_user(ctx, username);
2837 /* some sort of system error. The log was already printed */
2838 ret = PAM_SERVICE_ERR;
2841 /* the user does not exist */
2842 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
2844 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
2848 ret = PAM_USER_UNKNOWN;
2851 pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2852 (const void **)&tmp);
2854 ret = atoi((const char *)tmp);
2856 case PAM_AUTHTOK_EXPIRED:
2857 /* fall through, since new token is required in this case */
2858 case PAM_NEW_AUTHTOK_REQD:
2859 _pam_log(ctx, LOG_WARNING,
2860 "pam_sm_acct_mgmt success but %s is set",
2861 PAM_WINBIND_NEW_AUTHTOK_REQD);
2862 _pam_log(ctx, LOG_NOTICE,
2863 "user '%s' needs new password",
2865 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2866 ret = PAM_NEW_AUTHTOK_REQD;
2869 _pam_log(ctx, LOG_WARNING,
2870 "pam_sm_acct_mgmt success");
2871 _pam_log(ctx, LOG_NOTICE,
2872 "user '%s' granted access", username);
2878 /* Otherwise, the authentication looked good */
2879 _pam_log(ctx, LOG_NOTICE,
2880 "user '%s' granted access", username);
2884 /* we don't know anything about this return value */
2885 _pam_log(ctx, LOG_ERR,
2886 "internal module error (ret = %d, user = '%s')",
2888 ret = PAM_SERVICE_ERR;
2892 /* should not be reached */
2897 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
2905 int pam_sm_open_session(pam_handle_t *pamh, int flags,
2906 int argc, const char **argv)
2908 int ret = PAM_SUCCESS;
2909 struct pwb_context *ctx = NULL;
2911 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2916 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
2918 if (ctx->ctrl & WINBIND_MKHOMEDIR) {
2919 /* check and create homedir */
2920 ret = _pam_mkhomedir(ctx);
2923 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
2931 int pam_sm_close_session(pam_handle_t *pamh, int flags,
2932 int argc, const char **argv)
2934 int ret = PAM_SUCCESS;
2935 struct pwb_context *ctx = NULL;
2937 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2942 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
2945 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
2953 * evaluate whether we need to re-authenticate with kerberos after a
2956 * @param ctx PAM winbind context.
2957 * @param user The username
2959 * @return boolean Returns true if required, false if not.
2962 static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
2966 /* Make sure that we only do this if a) the chauthtok got initiated
2967 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2968 * later password change via the "passwd" command if done by the user
2970 * NB. If we login from gdm or xdm and the password expires,
2971 * we change the password, but there is no memory cache.
2972 * Thus, even for passthrough login, we should do the
2973 * authentication again to update memory cache.
2977 char *new_authtok_reqd_during_auth = NULL;
2978 struct passwd *pwd = NULL;
2980 _pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2981 &new_authtok_reqd_during_auth);
2982 pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2985 if (new_authtok_reqd_during_auth) {
2989 pwd = getpwnam(user);
2994 if (getuid() == pwd->pw_uid) {
3003 int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
3004 int argc, const char **argv)
3008 bool cached_login = false;
3010 /* <DO NOT free() THESE> */
3012 char *pass_old, *pass_new;
3013 /* </DO NOT free() THESE> */
3018 char *username_ret = NULL;
3019 struct wbcAuthErrorInfo *error = NULL;
3020 struct pwb_context *ctx = NULL;
3022 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
3027 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
3029 cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
3031 /* clearing offline bit for auth */
3032 ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
3035 * First get the name of a user
3037 ret = pam_get_user(pamh, &user, _("Username: "));
3039 _pam_log(ctx, LOG_ERR,
3040 "password - could not identify user");
3045 _pam_log(ctx, LOG_ERR, "username was NULL!");
3046 ret = PAM_USER_UNKNOWN;
3050 _pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
3052 /* check if this is really a user in winbindd, not only in NSS */
3053 ret = valid_user(ctx, user);
3056 ret = PAM_USER_UNKNOWN;
3059 ret = PAM_SYSTEM_ERR;
3066 * obtain and verify the current password (OLDAUTHTOK) for
3070 if (flags & PAM_PRELIM_CHECK) {
3071 time_t pwdlastset_prelim = 0;
3073 /* instruct user what is happening */
3075 #define greeting _("Changing password for")
3076 Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
3078 _pam_log(ctx, LOG_CRIT,
3079 "password - out of memory");
3085 lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
3086 ret = _winbind_read_password(ctx, lctrl,
3088 _("(current) NT password: "),
3090 (const char **) &pass_old);
3091 TALLOC_FREE(Announce);
3092 if (ret != PAM_SUCCESS) {
3093 _pam_log(ctx, LOG_NOTICE,
3094 "password - (old) token not obtained");
3098 /* verify that this is the password for this user */
3100 ret = winbind_auth_request(ctx, user, pass_old,
3103 &pwdlastset_prelim, NULL);
3105 if (ret != PAM_ACCT_EXPIRED &&
3106 ret != PAM_AUTHTOK_EXPIRED &&
3107 ret != PAM_NEW_AUTHTOK_REQD &&
3108 ret != PAM_SUCCESS) {
3113 pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3114 (void *)pwdlastset_prelim, NULL);
3116 ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
3117 (const void *) pass_old);
3119 if (ret != PAM_SUCCESS) {
3120 _pam_log(ctx, LOG_CRIT,
3121 "failed to set PAM_OLDAUTHTOK");
3123 } else if (flags & PAM_UPDATE_AUTHTOK) {
3125 time_t pwdlastset_update = 0;
3128 * obtain the proposed password
3132 * get the old token back.
3135 ret = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
3137 if (ret != PAM_SUCCESS) {
3138 _pam_log(ctx, LOG_NOTICE,
3139 "user not authenticated");
3143 lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
3145 if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
3146 lctrl |= WINBIND_USE_FIRST_PASS_ARG;
3149 ret = PAM_AUTHTOK_ERR;
3150 while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
3152 * use_authtok is to force the use of a previously entered
3153 * password -- needed for pluggable password strength checking
3156 ret = _winbind_read_password(ctx, lctrl,
3158 _("Enter new NT password: "),
3159 _("Retype new NT password: "),
3160 (const char **)&pass_new);
3162 if (ret != PAM_SUCCESS) {
3163 _pam_log_debug(ctx, LOG_ALERT,
3165 "new password not obtained");
3166 pass_old = NULL;/* tidy up */
3171 * At this point we know who the user is and what they
3172 * propose as their new password. Verify that the new
3173 * password is acceptable.
3176 if (pass_new[0] == '\0') {/* "\0" password = NULL */
3182 * By reaching here we have approved the passwords and must now
3183 * rebuild the password database file.
3185 _pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3186 &pwdlastset_update);
3189 * if cached creds were enabled, make sure to set the
3190 * WINBIND_CACHED_LOGIN bit here in order to have winbindd
3191 * update the cached creds storage - gd
3194 ctx->ctrl |= WINBIND_CACHED_LOGIN;
3197 ret = winbind_chauthtok_request(ctx, user, pass_old,
3198 pass_new, pwdlastset_update);
3200 pass_old = pass_new = NULL;
3204 if (_pam_require_krb5_auth_after_chauthtok(ctx, user)) {
3206 const char *member = NULL;
3207 const char *cctype = NULL;
3208 int warn_pwd_expire;
3209 struct wbcLogonUserInfo *info = NULL;
3210 struct wbcUserPasswordPolicyInfo *policy = NULL;
3212 member = get_member_from_config(ctx);
3213 cctype = get_krb5_cc_type_from_config(ctx);
3214 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
3216 /* Keep WINBIND_CACHED_LOGIN bit for
3217 * authentication after changing the password.
3218 * This will update the cached credentials in case
3219 * that winbindd_dual_pam_chauthtok() fails
3224 ret = winbind_auth_request(ctx, user, pass_new,
3226 &error, &info, &policy,
3227 NULL, &username_ret);
3228 pass_old = pass_new = NULL;
3230 if (ret == PAM_SUCCESS) {
3232 struct wbcAuthUserInfo *user_info = NULL;
3234 if (info && info->info) {
3235 user_info = info->info;
3238 /* warn a user if the password is about to
3240 _pam_warn_password_expiry(ctx, user_info, policy,
3244 /* set some info3 info for other modules in the
3246 _pam_set_data_info3(ctx, user_info);
3248 /* put krb5ccname into env */
3249 _pam_setup_krb5_env(ctx, info);
3252 pam_set_item(pamh, PAM_USER,
3254 _pam_log_debug(ctx, LOG_INFO,
3255 "Returned user was '%s'",
3262 if (info && info->blobs) {
3263 wbcFreeMemory(info->blobs);
3265 wbcFreeMemory(info);
3266 wbcFreeMemory(policy);
3271 ret = PAM_SERVICE_ERR;
3276 /* Deal with offline errors. */
3278 const char *codes[] = {
3279 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3280 "NT_STATUS_NO_LOGON_SERVERS",
3281 "NT_STATUS_ACCESS_DENIED"
3284 for (i=0; i<ARRAY_SIZE(codes); i++) {
3286 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
3292 wbcFreeMemory(error);
3294 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
3303 /* static module data */
3305 struct pam_module _pam_winbind_modstruct = {
3307 pam_sm_authenticate,
3310 pam_sm_open_session,
3311 pam_sm_close_session,
3318 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3319 * Copyright (c) Tim Potter <tpot@samba.org> 2000
3320 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3321 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3322 * Copyright (c) Jan Rêkorajski 1999.
3323 * Copyright (c) Andrew G. Morgan 1996-8.
3324 * Copyright (c) Alex O. Yuriev, 1996.
3325 * Copyright (c) Cristian Gafton 1996.
3326 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3328 * Redistribution and use in source and binary forms, with or without
3329 * modification, are permitted provided that the following conditions
3331 * 1. Redistributions of source code must retain the above copyright
3332 * notice, and the entire permission notice in its entirety,
3333 * including the disclaimer of warranties.
3334 * 2. Redistributions in binary form must reproduce the above copyright
3335 * notice, this list of conditions and the following disclaimer in the
3336 * documentation and/or other materials provided with the distribution.
3337 * 3. The name of the author may not be used to endorse or promote
3338 * products derived from this software without specific prior
3339 * written permission.
3341 * ALTERNATIVELY, this product may be distributed under the terms of
3342 * the GNU Public License, in which case the provisions of the GPL are
3343 * required INSTEAD OF the above restrictions. (This clause is
3344 * necessary due to a potential bad interaction between the GPL and
3345 * the restrictions contained in a BSD-style copyright.)
3347 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3348 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3349 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3350 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3351 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3352 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3353 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3354 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3355 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3356 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3357 * OF THE POSSIBILITY OF SUCH DAMAGE.