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, 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);
1202 if ((len != 0) && (sid_list_buffer[len - 1] == ',')) {
1203 sid_list_buffer[len - 1] = '\0';
1210 SAFE_FREE(current_name);
1215 * put krb5ccname variable into environment
1217 * @param ctx PAM winbind context.
1218 * @param krb5ccname env variable retrieved from winbindd.
1223 static void _pam_setup_krb5_env(struct pwb_context *ctx,
1224 struct wbcLogonUserInfo *info)
1229 const char *krb5ccname = NULL;
1231 if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
1239 for (i=0; i < info->num_blobs; i++) {
1240 if (strcasecmp(info->blobs[i].name, "krb5ccname") == 0) {
1241 krb5ccname = (const char *)info->blobs[i].blob.data;
1246 if (!krb5ccname || (strlen(krb5ccname) == 0)) {
1250 _pam_log_debug(ctx, LOG_DEBUG,
1251 "request returned KRB5CCNAME: %s", krb5ccname);
1253 if (snprintf(var, sizeof(var), "KRB5CCNAME=%s", krb5ccname) == -1) {
1257 ret = pam_putenv(ctx->pamh, var);
1259 _pam_log(ctx, LOG_ERR,
1260 "failed to set KRB5CCNAME to %s: %s",
1261 var, pam_strerror(ctx->pamh, ret));
1266 * Copy unix username if available (further processed in PAM).
1268 * @param ctx PAM winbind context
1269 * @param user_ret A pointer that holds a pointer to a string
1270 * @param unix_username A username
1275 static void _pam_setup_unix_username(struct pwb_context *ctx,
1277 struct wbcLogonUserInfo *info)
1279 const char *unix_username = NULL;
1282 if (!user_ret || !info) {
1286 for (i=0; i < info->num_blobs; i++) {
1287 if (strcasecmp(info->blobs[i].name, "unix_username") == 0) {
1288 unix_username = (const char *)info->blobs[i].blob.data;
1293 if (!unix_username || !unix_username[0]) {
1297 *user_ret = strdup(unix_username);
1301 * Set string into the PAM stack.
1303 * @param ctx PAM winbind context.
1304 * @param data_name Key name for pam_set_data.
1305 * @param value String value.
1310 static void _pam_set_data_string(struct pwb_context *ctx,
1311 const char *data_name,
1316 if (!data_name || !value || (strlen(data_name) == 0) ||
1317 (strlen(value) == 0)) {
1321 ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
1322 _pam_winbind_cleanup_func);
1324 _pam_log_debug(ctx, LOG_DEBUG,
1325 "Could not set data %s: %s\n",
1326 data_name, pam_strerror(ctx->pamh, ret));
1331 * Set info3 strings into the PAM stack.
1333 * @param ctx PAM winbind context.
1334 * @param data_name Key name for pam_set_data.
1335 * @param value String value.
1340 static void _pam_set_data_info3(struct pwb_context *ctx,
1341 const struct wbcAuthUserInfo *info)
1343 _pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
1344 info->home_directory);
1345 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
1346 info->logon_script);
1347 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
1348 info->logon_server);
1349 _pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
1350 info->profile_path);
1354 * Free info3 strings in the PAM stack.
1356 * @param pamh PAM handle
1361 static void _pam_free_data_info3(pam_handle_t *pamh)
1363 pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1364 pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1365 pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1366 pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1370 * Send PAM_ERROR_MSG for cached or grace logons.
1372 * @param ctx PAM winbind context.
1373 * @param username User in PAM request.
1374 * @param info3_user_flgs Info3 flags containing logon type bits.
1379 static void _pam_warn_logon_type(struct pwb_context *ctx,
1380 const char *username,
1381 uint32_t info3_user_flgs)
1383 /* inform about logon type */
1384 if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1386 _make_remark(ctx, PAM_ERROR_MSG,
1388 "Please change your password as soon you're "
1390 _pam_log_debug(ctx, LOG_DEBUG,
1391 "User %s logged on using grace logon\n",
1394 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1396 _make_remark(ctx, PAM_ERROR_MSG,
1397 _("Domain Controller unreachable, "
1398 "using cached credentials instead. "
1399 "Network resources may be unavailable"));
1400 _pam_log_debug(ctx, LOG_DEBUG,
1401 "User %s logged on using cached credentials\n",
1407 * Send PAM_ERROR_MSG for krb5 errors.
1409 * @param ctx PAM winbind context.
1410 * @param username User in PAM request.
1411 * @param info3_user_flgs Info3 flags containing logon type bits.
1416 static void _pam_warn_krb5_failure(struct pwb_context *ctx,
1417 const char *username,
1418 uint32_t info3_user_flgs)
1420 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1421 _make_remark(ctx, PAM_ERROR_MSG,
1422 _("Failed to establish your Kerberos Ticket cache "
1423 "due time differences\n"
1424 "with the domain controller. "
1425 "Please verify the system time.\n"));
1426 _pam_log_debug(ctx, LOG_DEBUG,
1427 "User %s: Clock skew when getting Krb5 TGT\n",
1432 static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
1433 const struct wbcAuthErrorInfo *e,
1434 const char *nt_status_string,
1437 const char *ntstatus = NULL;
1438 const char *error_string = NULL;
1440 if (!e || !pam_error) {
1444 ntstatus = e->nt_string;
1449 if (strcasecmp(ntstatus, nt_status_string) == 0) {
1451 error_string = _get_ntstatus_error_string(nt_status_string);
1453 _make_remark(ctx, PAM_ERROR_MSG, error_string);
1454 *pam_error = e->pam_error;
1458 if (e->display_string) {
1459 _make_remark(ctx, PAM_ERROR_MSG, _(e->display_string));
1460 *pam_error = e->pam_error;
1464 _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
1465 *pam_error = e->pam_error;
1474 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1476 * @param i The wbcUserPasswordPolicyInfo struct.
1478 * @return string (caller needs to talloc_free).
1481 static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
1482 struct wbcUserPasswordPolicyInfo *i)
1490 str = talloc_asprintf(ctx, _("Your password "));
1495 if (i->min_length_password > 0) {
1496 str = talloc_asprintf_append(str,
1497 _("must be at least %d characters; "),
1498 i->min_length_password);
1504 if (i->password_history > 0) {
1505 str = talloc_asprintf_append(str,
1506 _("cannot repeat any of your previous %d "
1508 i->password_history);
1514 if (i->password_properties & WBC_DOMAIN_PASSWORD_COMPLEX) {
1515 str = talloc_asprintf_append(str,
1516 _("must contain capitals, numerals "
1518 "and cannot contain your account "
1525 str = talloc_asprintf_append(str,
1526 _("Please type a different password. "
1527 "Type a password which meets these requirements in "
1528 "both text boxes."));
1540 static int _pam_create_homedir(struct pwb_context *ctx,
1541 const char *dirname,
1546 if (stat(dirname, &sbuf) == 0) {
1550 if (mkdir(dirname, mode) != 0) {
1552 _make_remark_format(ctx, PAM_TEXT_INFO,
1553 _("Creating directory: %s failed: %s"),
1554 dirname, strerror(errno));
1555 _pam_log(ctx, LOG_ERR, "could not create dir: %s (%s)",
1556 dirname, strerror(errno));
1557 return PAM_PERM_DENIED;
1563 static int _pam_chown_homedir(struct pwb_context *ctx,
1564 const char *dirname,
1568 if (chown(dirname, uid, gid) != 0) {
1569 _pam_log(ctx, LOG_ERR, "failed to chown user homedir: %s (%s)",
1570 dirname, strerror(errno));
1571 return PAM_PERM_DENIED;
1577 static int _pam_mkhomedir(struct pwb_context *ctx)
1579 struct passwd *pwd = NULL;
1581 char *create_dir = NULL;
1582 char *user_dir = NULL;
1584 const char *username;
1586 char *safe_ptr = NULL;
1589 /* Get the username */
1590 ret = pam_get_user(ctx->pamh, &username, NULL);
1591 if ((ret != PAM_SUCCESS) || (!username)) {
1592 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1593 return PAM_SERVICE_ERR;
1596 pwd = getpwnam(username);
1598 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1599 return PAM_USER_UNKNOWN;
1601 _pam_log_debug(ctx, LOG_DEBUG, "homedir is: %s", pwd->pw_dir);
1603 ret = _pam_create_homedir(ctx, pwd->pw_dir, 0700);
1604 if (ret == PAM_SUCCESS) {
1605 ret = _pam_chown_homedir(ctx, pwd->pw_dir,
1610 if (ret == PAM_SUCCESS) {
1614 /* maybe we need to create parent dirs */
1615 create_dir = talloc_strdup(ctx, "/");
1620 /* find final directory */
1621 user_dir = strrchr(pwd->pw_dir, '/');
1627 _pam_log(ctx, LOG_DEBUG, "final directory: %s", user_dir);
1631 while ((token = strtok_r(p, "/", &safe_ptr)) != NULL) {
1637 _pam_log_debug(ctx, LOG_DEBUG, "token is %s", token);
1639 create_dir = talloc_asprintf_append(create_dir, "%s/", token);
1643 _pam_log_debug(ctx, LOG_DEBUG, "current_dir is %s", create_dir);
1645 if (strcmp(token, user_dir) == 0) {
1646 _pam_log_debug(ctx, LOG_DEBUG, "assuming last directory: %s", token);
1650 ret = _pam_create_homedir(ctx, create_dir, mode);
1656 return _pam_chown_homedir(ctx, create_dir,
1661 /* talk to winbindd */
1662 static int winbind_auth_request(struct pwb_context *ctx,
1667 const int warn_pwd_expire,
1668 struct wbcAuthErrorInfo **p_error,
1669 struct wbcLogonUserInfo **p_info,
1670 struct wbcUserPasswordPolicyInfo **p_policy,
1671 time_t *pwd_last_set,
1676 struct wbcLogonUserParams logon;
1677 char membership_of[1024];
1678 uid_t user_uid = -1;
1679 uint32_t flags = WBFLAG_PAM_INFO3_TEXT |
1680 WBFLAG_PAM_GET_PWD_POLICY;
1682 struct wbcLogonUserInfo *info = NULL;
1683 struct wbcAuthUserInfo *user_info = NULL;
1684 struct wbcAuthErrorInfo *error = NULL;
1685 struct wbcUserPasswordPolicyInfo *policy = NULL;
1687 int ret = PAM_AUTH_ERR;
1689 const char *codes[] = {
1690 "NT_STATUS_PASSWORD_EXPIRED",
1691 "NT_STATUS_PASSWORD_MUST_CHANGE",
1692 "NT_STATUS_INVALID_WORKSTATION",
1693 "NT_STATUS_INVALID_LOGON_HOURS",
1694 "NT_STATUS_ACCOUNT_EXPIRED",
1695 "NT_STATUS_ACCOUNT_DISABLED",
1696 "NT_STATUS_ACCOUNT_LOCKED_OUT",
1697 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1698 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1699 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1700 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1701 "NT_STATUS_NO_LOGON_SERVERS",
1702 "NT_STATUS_WRONG_PASSWORD",
1703 "NT_STATUS_ACCESS_DENIED"
1710 /* Krb5 auth always has to go against the KDC of the user's realm */
1712 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1713 flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
1716 if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1717 struct passwd *pwd = NULL;
1719 pwd = getpwnam(user);
1721 return PAM_USER_UNKNOWN;
1723 user_uid = pwd->pw_uid;
1726 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1728 _pam_log_debug(ctx, LOG_DEBUG,
1729 "enabling krb5 login flag\n");
1731 flags |= WBFLAG_PAM_KRB5 |
1732 WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1735 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1736 _pam_log_debug(ctx, LOG_DEBUG,
1737 "enabling cached login flag\n");
1738 flags |= WBFLAG_PAM_CACHED_LOGIN;
1743 flags |= WBFLAG_PAM_UNIX_NAME;
1746 if (cctype != NULL) {
1747 _pam_log_debug(ctx, LOG_DEBUG,
1748 "enabling request for a %s krb5 ccache\n",
1752 if (member != NULL) {
1754 ZERO_STRUCT(membership_of);
1756 if (!winbind_name_list_to_sid_string_list(ctx, user, member,
1758 sizeof(membership_of))) {
1759 _pam_log_debug(ctx, LOG_ERR,
1760 "failed to serialize membership of sid "
1761 "\"%s\"\n", member);
1762 return PAM_AUTH_ERR;
1768 logon.username = user;
1769 logon.password = pass;
1772 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1778 if (!WBC_ERROR_IS_OK(wbc_status)) {
1783 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1789 if (!WBC_ERROR_IS_OK(wbc_status)) {
1793 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1797 (uint8_t *)&user_uid,
1799 if (!WBC_ERROR_IS_OK(wbc_status)) {
1804 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1808 (uint8_t *)membership_of,
1809 sizeof(membership_of));
1810 if (!WBC_ERROR_IS_OK(wbc_status)) {
1815 wbc_status = wbcLogonUser(&logon, &info, &error, &policy);
1816 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1817 user, "wbcLogonUser");
1818 wbcFreeMemory(logon.blobs);
1821 if (info && info->info) {
1822 user_info = info->info;
1825 if (pwd_last_set && user_info) {
1826 *pwd_last_set = user_info->pass_last_set_time;
1829 if (p_info && info) {
1833 if (p_policy && policy) {
1837 if (p_error && error) {
1838 /* We want to process the error in the caller. */
1843 for (i=0; i<ARRAY_SIZE(codes); i++) {
1845 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1851 if ((ret == PAM_SUCCESS) && user_info && policy && info) {
1853 bool already_expired = false;
1854 bool change_pwd = false;
1856 /* warn a user if the password is about to expire soon */
1857 _pam_warn_password_expiry(ctx, user_info, policy,
1862 if (already_expired == true) {
1864 SMB_TIME_T last_set = user_info->pass_last_set_time;
1866 _pam_log_debug(ctx, LOG_DEBUG,
1867 "Password has expired "
1868 "(Password was last set: %lld, "
1869 "the policy says it should expire here "
1870 "%lld (now it's: %ld))\n",
1871 (long long int)last_set,
1872 (long long int)last_set +
1876 return PAM_AUTHTOK_EXPIRED;
1880 ret = PAM_NEW_AUTHTOK_REQD;
1884 /* inform about logon type */
1885 _pam_warn_logon_type(ctx, user, user_info->user_flags);
1887 /* inform about krb5 failures */
1888 _pam_warn_krb5_failure(ctx, user, user_info->user_flags);
1890 /* set some info3 info for other modules in the stack */
1891 _pam_set_data_info3(ctx, user_info);
1893 /* put krb5ccname into env */
1894 _pam_setup_krb5_env(ctx, info);
1896 /* If winbindd returned a username, return the pointer to it
1898 _pam_setup_unix_username(ctx, user_ret, info);
1903 wbcFreeMemory(logon.blobs);
1905 if (info && info->blobs && !p_info) {
1906 wbcFreeMemory(info->blobs);
1908 if (error && !p_error) {
1909 wbcFreeMemory(error);
1911 if (info && !p_info) {
1912 wbcFreeMemory(info);
1914 if (policy && !p_policy) {
1915 wbcFreeMemory(policy);
1921 /* talk to winbindd */
1922 static int winbind_chauthtok_request(struct pwb_context *ctx,
1924 const char *oldpass,
1925 const char *newpass,
1926 time_t pwd_last_set)
1929 struct wbcChangePasswordParams params;
1930 struct wbcAuthErrorInfo *error = NULL;
1931 struct wbcUserPasswordPolicyInfo *policy = NULL;
1932 enum wbcPasswordChangeRejectReason reject_reason = -1;
1936 const char *codes[] = {
1937 "NT_STATUS_BACKUP_CONTROLLER",
1938 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1939 "NT_STATUS_NO_LOGON_SERVERS",
1940 "NT_STATUS_ACCESS_DENIED",
1941 "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1942 "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1943 "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1945 int ret = PAM_AUTH_ERR;
1947 ZERO_STRUCT(params);
1949 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1950 flags |= WBFLAG_PAM_KRB5 |
1951 WBFLAG_PAM_CONTACT_TRUSTDOM;
1954 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1955 flags |= WBFLAG_PAM_CACHED_LOGIN;
1958 params.account_name = user;
1959 params.level = WBC_AUTH_USER_LEVEL_PLAIN;
1960 params.old_password.plaintext = oldpass;
1961 params.new_password.plaintext = newpass;
1962 params.flags = flags;
1964 wbc_status = wbcChangeUserPasswordEx(¶ms, &error, &reject_reason, &policy);
1965 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1966 user, "wbcChangeUserPasswordEx");
1968 if (WBC_ERROR_IS_OK(wbc_status)) {
1969 _pam_log(ctx, LOG_NOTICE,
1970 "user '%s' password changed", user);
1975 wbcFreeMemory(policy);
1979 for (i=0; i<ARRAY_SIZE(codes); i++) {
1981 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1987 if (!strcasecmp(error->nt_string,
1988 "NT_STATUS_PASSWORD_RESTRICTION")) {
1990 char *pwd_restriction_string = NULL;
1991 SMB_TIME_T min_pwd_age = 0;
1994 min_pwd_age = policy->min_passwordage;
1997 /* FIXME: avoid to send multiple PAM messages after another */
1998 switch (reject_reason) {
2001 case WBC_PWD_CHANGE_NO_ERROR:
2002 if ((min_pwd_age > 0) &&
2003 (pwd_last_set + min_pwd_age > time(NULL))) {
2004 PAM_WB_REMARK_DIRECT(ctx,
2005 "NT_STATUS_PWD_TOO_RECENT");
2008 case WBC_PWD_CHANGE_PASSWORD_TOO_SHORT:
2009 PAM_WB_REMARK_DIRECT(ctx,
2010 "NT_STATUS_PWD_TOO_SHORT");
2012 case WBC_PWD_CHANGE_PWD_IN_HISTORY:
2013 PAM_WB_REMARK_DIRECT(ctx,
2014 "NT_STATUS_PWD_HISTORY_CONFLICT");
2016 case WBC_PWD_CHANGE_NOT_COMPLEX:
2017 _make_remark(ctx, PAM_ERROR_MSG,
2018 _("Password does not meet "
2019 "complexity requirements"));
2022 _pam_log_debug(ctx, LOG_DEBUG,
2023 "unknown password change "
2024 "reject reason: %d",
2029 pwd_restriction_string =
2030 _pam_compose_pwd_restriction_string(ctx, policy);
2031 if (pwd_restriction_string) {
2032 _make_remark(ctx, PAM_ERROR_MSG,
2033 pwd_restriction_string);
2034 TALLOC_FREE(pwd_restriction_string);
2038 wbcFreeMemory(error);
2039 wbcFreeMemory(policy);
2045 * Checks if a user has an account
2048 * 1 = User not found
2052 static int valid_user(struct pwb_context *ctx,
2055 /* check not only if the user is available over NSS calls, also make
2056 * sure it's really a winbind user, this is important when stacking PAM
2057 * modules in the 'account' or 'password' facility. */
2060 struct passwd *pwd = NULL;
2061 struct passwd *wb_pwd = NULL;
2063 pwd = getpwnam(user);
2068 wbc_status = wbcGetpwnam(user, &wb_pwd);
2069 wbcFreeMemory(wb_pwd);
2070 if (!WBC_ERROR_IS_OK(wbc_status)) {
2071 _pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
2072 wbcErrorString(wbc_status));
2075 switch (wbc_status) {
2076 case WBC_ERR_UNKNOWN_USER:
2078 case WBC_ERR_SUCCESS:
2086 static char *_pam_delete(register char *xx)
2094 * obtain a password from the user
2097 static int _winbind_read_password(struct pwb_context *ctx,
2099 const char *comment,
2100 const char *prompt1,
2101 const char *prompt2,
2109 _pam_log(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
2112 * make sure nothing inappropriate gets returned
2115 *pass = token = NULL;
2118 * which authentication token are we getting?
2121 if (on(WINBIND__OLD_PASSWORD, ctrl)) {
2122 authtok_flag = PAM_OLDAUTHTOK;
2124 authtok_flag = PAM_AUTHTOK;
2128 * should we obtain the password from a PAM item ?
2131 if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
2132 on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2133 retval = _pam_get_item(ctx->pamh, authtok_flag, &item);
2134 if (retval != PAM_SUCCESS) {
2136 _pam_log(ctx, LOG_ALERT,
2137 "pam_get_item returned error "
2138 "to unix-read-password");
2140 } else if (item != NULL) { /* we have a password! */
2143 _pam_log(ctx, LOG_DEBUG,
2144 "pam_get_item returned a password");
2146 } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2147 return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
2148 } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
2149 && off(WINBIND__OLD_PASSWORD, ctrl)) {
2150 return PAM_AUTHTOK_RECOVER_ERR;
2154 * getting here implies we will have to get the password from the
2159 struct pam_message msg[3], *pmsg[3];
2160 struct pam_response *resp;
2163 /* prepare to converse */
2165 if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
2167 msg[0].msg_style = PAM_TEXT_INFO;
2168 msg[0].msg = discard_const_p(char, comment);
2175 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2176 msg[i++].msg = discard_const_p(char, prompt1);
2179 if (prompt2 != NULL) {
2181 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2182 msg[i++].msg = discard_const_p(char, prompt2);
2185 /* so call the conversation expecting i responses */
2187 retval = converse(ctx->pamh, i, pmsg, &resp);
2189 if (retval == PAM_SUCCESS) {
2190 retval = PAM_AUTHTOK_RECOVER_ERR;
2194 if (retval != PAM_SUCCESS) {
2195 _pam_drop_reply(resp, i);
2199 /* interpret the response */
2201 token = x_strdup(resp[i - replies].resp);
2203 _pam_log(ctx, LOG_NOTICE,
2204 "could not recover "
2205 "authentication token");
2206 retval = PAM_AUTHTOK_RECOVER_ERR;
2211 /* verify that password entered correctly */
2212 if (!resp[i - 1].resp ||
2213 strcmp(token, resp[i - 1].resp)) {
2214 _pam_delete(token); /* mistyped */
2215 retval = PAM_AUTHTOK_RECOVER_ERR;
2216 _make_remark(ctx, PAM_ERROR_MSG,
2222 * tidy up the conversation (resp_retcode) is ignored
2223 * -- what is it for anyway? AGM
2225 _pam_drop_reply(resp, i);
2229 if (retval != PAM_SUCCESS) {
2230 _pam_log_debug(ctx, LOG_DEBUG,
2231 "unable to obtain a password");
2234 /* 'token' is the entered password */
2236 /* we store this password as an item */
2238 retval = pam_set_item(ctx->pamh, authtok_flag, token);
2239 _pam_delete(token); /* clean it up */
2240 if (retval != PAM_SUCCESS ||
2241 (retval = _pam_get_item(ctx->pamh, authtok_flag, &item)) != PAM_SUCCESS) {
2243 _pam_log(ctx, LOG_CRIT, "error manipulating password");
2249 item = NULL; /* break link to password */
2254 static const char *get_conf_item_string(struct pwb_context *ctx,
2259 const char *parm_opt = NULL;
2261 if (!(ctx->ctrl & config_flag)) {
2265 /* let the pam opt take precedence over the pam_winbind.conf option */
2266 for (i=0; i<ctx->argc; i++) {
2268 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2271 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2272 _pam_log(ctx, LOG_INFO,
2273 "no \"=\" delimiter for \"%s\" found\n",
2277 _pam_log_debug(ctx, LOG_INFO,
2278 "PAM config: %s '%s'\n", item, p+1);
2286 key = talloc_asprintf(ctx, "global:%s", item);
2291 parm_opt = iniparser_getstr(ctx->dict, key);
2294 _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
2301 static int get_config_item_int(struct pwb_context *ctx,
2305 int i, parm_opt = -1;
2307 if (!(ctx->ctrl & config_flag)) {
2311 /* let the pam opt take precedence over the pam_winbind.conf option */
2312 for (i = 0; i < ctx->argc; i++) {
2314 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2317 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2318 _pam_log(ctx, LOG_INFO,
2319 "no \"=\" delimiter for \"%s\" found\n",
2323 parm_opt = atoi(p + 1);
2324 _pam_log_debug(ctx, LOG_INFO,
2325 "PAM config: %s '%d'\n",
2334 key = talloc_asprintf(ctx, "global:%s", item);
2339 parm_opt = iniparser_getint(ctx->dict, key, -1);
2342 _pam_log_debug(ctx, LOG_INFO,
2343 "CONFIG file: %s '%d'\n",
2350 static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
2352 return get_conf_item_string(ctx, "krb5_ccache_type",
2353 WINBIND_KRB5_CCACHE_TYPE);
2356 static const char *get_member_from_config(struct pwb_context *ctx)
2358 const char *ret = NULL;
2359 ret = get_conf_item_string(ctx, "require_membership_of",
2360 WINBIND_REQUIRED_MEMBERSHIP);
2364 return get_conf_item_string(ctx, "require-membership-of",
2365 WINBIND_REQUIRED_MEMBERSHIP);
2368 static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
2371 ret = get_config_item_int(ctx, "warn_pwd_expire",
2372 WINBIND_WARN_PWD_EXPIRE);
2373 /* no or broken setting */
2375 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
2381 * Retrieve the winbind separator.
2383 * @param ctx PAM winbind context.
2385 * @return string separator character. NULL on failure.
2388 static char winbind_get_separator(struct pwb_context *ctx)
2391 static struct wbcInterfaceDetails *details = NULL;
2393 wbc_status = wbcInterfaceDetails(&details);
2394 if (!WBC_ERROR_IS_OK(wbc_status)) {
2395 _pam_log(ctx, LOG_ERR,
2396 "Could not retrieve winbind interface details: %s",
2397 wbcErrorString(wbc_status));
2405 return details->winbind_separator;
2410 * Convert a upn to a name.
2412 * @param ctx PAM winbind context.
2413 * @param upn USer UPN to be trabslated.
2415 * @return converted name. NULL pointer on failure. Caller needs to free.
2418 static char* winbind_upn_to_username(struct pwb_context *ctx,
2422 wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
2423 struct wbcDomainSid sid;
2424 enum wbcSidType type;
2429 /* This cannot work when the winbind separator = @ */
2431 sep = winbind_get_separator(ctx);
2432 if (!sep || sep == '@') {
2436 name = talloc_strdup(ctx, upn);
2440 if ((p = strchr(name, '@')) != NULL) {
2445 /* Convert the UPN to a SID */
2447 wbc_status = wbcLookupName(domain, name, &sid, &type);
2448 if (!WBC_ERROR_IS_OK(wbc_status)) {
2452 /* Convert the the SID back to the sAMAccountName */
2454 wbc_status = wbcLookupSid(&sid, &domain, &name, &type);
2455 if (!WBC_ERROR_IS_OK(wbc_status)) {
2459 return talloc_asprintf(ctx, "%s\\%s", domain, name);
2462 static int _pam_delete_cred(pam_handle_t *pamh, int flags,
2463 int argc, const char **argv)
2465 int retval = PAM_SUCCESS;
2466 struct pwb_context *ctx = NULL;
2467 struct wbcLogoffUserParams logoff;
2468 struct wbcAuthErrorInfo *error = NULL;
2470 wbcErr wbc_status = WBC_ERR_SUCCESS;
2472 ZERO_STRUCT(logoff);
2474 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2479 _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
2481 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2483 /* destroy the ccache here */
2485 uint32_t wbc_flags = 0;
2486 const char *ccname = NULL;
2487 struct passwd *pwd = NULL;
2489 retval = pam_get_user(pamh, &user, _("Username: "));
2491 _pam_log(ctx, LOG_ERR,
2492 "could not identify user");
2497 _pam_log(ctx, LOG_ERR,
2498 "username was NULL!");
2499 retval = PAM_USER_UNKNOWN;
2503 _pam_log_debug(ctx, LOG_DEBUG,
2504 "username [%s] obtained", user);
2506 ccname = pam_getenv(pamh, "KRB5CCNAME");
2507 if (ccname == NULL) {
2508 _pam_log_debug(ctx, LOG_DEBUG,
2509 "user has no KRB5CCNAME environment");
2512 pwd = getpwnam(user);
2514 retval = PAM_USER_UNKNOWN;
2518 wbc_flags = WBFLAG_PAM_KRB5 |
2519 WBFLAG_PAM_CONTACT_TRUSTDOM;
2521 logoff.username = user;
2524 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2530 if (!WBC_ERROR_IS_OK(wbc_status)) {
2535 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2539 (uint8_t *)&wbc_flags,
2541 if (!WBC_ERROR_IS_OK(wbc_status)) {
2545 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2549 (uint8_t *)&pwd->pw_uid,
2550 sizeof(pwd->pw_uid));
2551 if (!WBC_ERROR_IS_OK(wbc_status)) {
2555 wbc_status = wbcLogoffUserEx(&logoff, &error);
2556 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2557 user, "wbcLogoffUser");
2558 wbcFreeMemory(error);
2559 wbcFreeMemory(logoff.blobs);
2560 logoff.blobs = NULL;
2562 if (!WBC_ERROR_IS_OK(wbc_status)) {
2563 _pam_log(ctx, LOG_INFO,
2564 "failed to logoff user %s: %s\n",
2565 user, wbcErrorString(wbc_status));
2571 wbcFreeMemory(logoff.blobs);
2574 if (!WBC_ERROR_IS_OK(wbc_status)) {
2575 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2576 user, "wbcLogoffUser");
2580 * Delete the krb5 ccname variable from the PAM environment
2581 * if it was set by winbind.
2583 if ((ctx->ctrl & WINBIND_KRB5_AUTH) && pam_getenv(pamh, "KRB5CCNAME")) {
2584 pam_putenv(pamh, "KRB5CCNAME");
2587 _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx, retval);
2595 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
2596 int argc, const char **argv)
2598 const char *username;
2599 const char *password;
2600 const char *member = NULL;
2601 const char *cctype = NULL;
2602 int warn_pwd_expire;
2603 int retval = PAM_AUTH_ERR;
2604 char *username_ret = NULL;
2605 char *new_authtok_required = NULL;
2606 char *real_username = NULL;
2607 struct pwb_context *ctx = NULL;
2609 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2614 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
2616 /* Get the username */
2617 retval = pam_get_user(pamh, &username, NULL);
2618 if ((retval != PAM_SUCCESS) || (!username)) {
2619 _pam_log_debug(ctx, LOG_DEBUG,
2620 "can not get the username");
2621 retval = PAM_SERVICE_ERR;
2627 /* Decode the user name since AIX does not support logn user
2628 names by default. The name is encoded as _#uid. */
2630 if (username[0] == '_') {
2631 uid_t id = atoi(&username[1]);
2632 struct passwd *pw = NULL;
2634 if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
2635 real_username = strdup(pw->pw_name);
2640 if (!real_username) {
2641 /* Just making a copy of the username we got from PAM */
2642 if ((real_username = strdup(username)) == NULL) {
2643 _pam_log_debug(ctx, LOG_DEBUG,
2644 "memory allocation failure when copying "
2646 retval = PAM_SERVICE_ERR;
2651 /* Maybe this was a UPN */
2653 if (strchr(real_username, '@') != NULL) {
2654 char *samaccountname = NULL;
2656 samaccountname = winbind_upn_to_username(ctx,
2658 if (samaccountname) {
2659 free(real_username);
2660 real_username = strdup(samaccountname);
2664 retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
2665 _("Password: "), NULL,
2668 if (retval != PAM_SUCCESS) {
2669 _pam_log(ctx, LOG_ERR,
2670 "Could not retrieve user's password");
2671 retval = PAM_AUTHTOK_ERR;
2675 /* Let's not give too much away in the log file */
2677 #ifdef DEBUG_PASSWORD
2678 _pam_log_debug(ctx, LOG_INFO,
2679 "Verify user '%s' with password '%s'",
2680 real_username, password);
2682 _pam_log_debug(ctx, LOG_INFO,
2683 "Verify user '%s'", real_username);
2686 member = get_member_from_config(ctx);
2687 cctype = get_krb5_cc_type_from_config(ctx);
2688 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2690 /* Now use the username to look up password */
2691 retval = winbind_auth_request(ctx, real_username, password,
2692 member, cctype, warn_pwd_expire,
2694 NULL, &username_ret);
2696 if (retval == PAM_NEW_AUTHTOK_REQD ||
2697 retval == PAM_AUTHTOK_EXPIRED) {
2699 char *new_authtok_required_during_auth = NULL;
2701 new_authtok_required = talloc_asprintf(NULL, "%d", retval);
2702 if (!new_authtok_required) {
2703 retval = PAM_BUF_ERR;
2707 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2708 new_authtok_required,
2709 _pam_winbind_cleanup_func);
2711 retval = PAM_SUCCESS;
2713 new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
2714 if (!new_authtok_required_during_auth) {
2715 retval = PAM_BUF_ERR;
2719 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2720 new_authtok_required_during_auth,
2721 _pam_winbind_cleanup_func);
2728 pam_set_item (pamh, PAM_USER, username_ret);
2729 _pam_log_debug(ctx, LOG_INFO,
2730 "Returned user was '%s'", username_ret);
2734 if (real_username) {
2735 free(real_username);
2738 if (!new_authtok_required) {
2739 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2742 if (retval != PAM_SUCCESS) {
2743 _pam_free_data_info3(pamh);
2746 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
2754 int pam_sm_setcred(pam_handle_t *pamh, int flags,
2755 int argc, const char **argv)
2757 int ret = PAM_SYSTEM_ERR;
2758 struct pwb_context *ctx = NULL;
2760 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2765 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
2767 switch (flags & ~PAM_SILENT) {
2769 case PAM_DELETE_CRED:
2770 ret = _pam_delete_cred(pamh, flags, argc, argv);
2772 case PAM_REFRESH_CRED:
2773 _pam_log_debug(ctx, LOG_WARNING,
2774 "PAM_REFRESH_CRED not implemented");
2777 case PAM_REINITIALIZE_CRED:
2778 _pam_log_debug(ctx, LOG_WARNING,
2779 "PAM_REINITIALIZE_CRED not implemented");
2782 case PAM_ESTABLISH_CRED:
2783 _pam_log_debug(ctx, LOG_WARNING,
2784 "PAM_ESTABLISH_CRED not implemented");
2788 ret = PAM_SYSTEM_ERR;
2794 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
2802 * Account management. We want to verify that the account exists
2803 * before returning PAM_SUCCESS
2806 int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2807 int argc, const char **argv)
2809 const char *username;
2810 int ret = PAM_USER_UNKNOWN;
2812 struct pwb_context *ctx = NULL;
2814 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2819 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
2822 /* Get the username */
2823 ret = pam_get_user(pamh, &username, NULL);
2824 if ((ret != PAM_SUCCESS) || (!username)) {
2825 _pam_log_debug(ctx, LOG_DEBUG,
2826 "can not get the username");
2827 ret = PAM_SERVICE_ERR;
2831 /* Verify the username */
2832 ret = valid_user(ctx, username);
2835 /* some sort of system error. The log was already printed */
2836 ret = PAM_SERVICE_ERR;
2839 /* the user does not exist */
2840 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
2842 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
2846 ret = PAM_USER_UNKNOWN;
2849 pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2850 (const void **)&tmp);
2852 ret = atoi((const char *)tmp);
2854 case PAM_AUTHTOK_EXPIRED:
2855 /* fall through, since new token is required in this case */
2856 case PAM_NEW_AUTHTOK_REQD:
2857 _pam_log(ctx, LOG_WARNING,
2858 "pam_sm_acct_mgmt success but %s is set",
2859 PAM_WINBIND_NEW_AUTHTOK_REQD);
2860 _pam_log(ctx, LOG_NOTICE,
2861 "user '%s' needs new password",
2863 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2864 ret = PAM_NEW_AUTHTOK_REQD;
2867 _pam_log(ctx, LOG_WARNING,
2868 "pam_sm_acct_mgmt success");
2869 _pam_log(ctx, LOG_NOTICE,
2870 "user '%s' granted access", username);
2876 /* Otherwise, the authentication looked good */
2877 _pam_log(ctx, LOG_NOTICE,
2878 "user '%s' granted access", username);
2882 /* we don't know anything about this return value */
2883 _pam_log(ctx, LOG_ERR,
2884 "internal module error (ret = %d, user = '%s')",
2886 ret = PAM_SERVICE_ERR;
2890 /* should not be reached */
2895 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
2903 int pam_sm_open_session(pam_handle_t *pamh, int flags,
2904 int argc, const char **argv)
2906 int ret = PAM_SUCCESS;
2907 struct pwb_context *ctx = NULL;
2909 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2914 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
2916 if (ctx->ctrl & WINBIND_MKHOMEDIR) {
2917 /* check and create homedir */
2918 ret = _pam_mkhomedir(ctx);
2921 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
2929 int pam_sm_close_session(pam_handle_t *pamh, int flags,
2930 int argc, const char **argv)
2932 int ret = PAM_SUCCESS;
2933 struct pwb_context *ctx = NULL;
2935 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2940 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
2943 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
2951 * evaluate whether we need to re-authenticate with kerberos after a
2954 * @param ctx PAM winbind context.
2955 * @param user The username
2957 * @return boolean Returns true if required, false if not.
2960 static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
2964 /* Make sure that we only do this if a) the chauthtok got initiated
2965 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2966 * later password change via the "passwd" command if done by the user
2968 * NB. If we login from gdm or xdm and the password expires,
2969 * we change the password, but there is no memory cache.
2970 * Thus, even for passthrough login, we should do the
2971 * authentication again to update memory cache.
2975 char *new_authtok_reqd_during_auth = NULL;
2976 struct passwd *pwd = NULL;
2978 _pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2979 &new_authtok_reqd_during_auth);
2980 pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2983 if (new_authtok_reqd_during_auth) {
2987 pwd = getpwnam(user);
2992 if (getuid() == pwd->pw_uid) {
3001 int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
3002 int argc, const char **argv)
3006 bool cached_login = false;
3008 /* <DO NOT free() THESE> */
3010 char *pass_old, *pass_new;
3011 /* </DO NOT free() THESE> */
3016 char *username_ret = NULL;
3017 struct wbcAuthErrorInfo *error = NULL;
3018 struct pwb_context *ctx = NULL;
3020 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
3025 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
3027 cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
3029 /* clearing offline bit for auth */
3030 ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
3033 * First get the name of a user
3035 ret = pam_get_user(pamh, &user, _("Username: "));
3037 _pam_log(ctx, LOG_ERR,
3038 "password - could not identify user");
3043 _pam_log(ctx, LOG_ERR, "username was NULL!");
3044 ret = PAM_USER_UNKNOWN;
3048 _pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
3050 /* check if this is really a user in winbindd, not only in NSS */
3051 ret = valid_user(ctx, user);
3054 ret = PAM_USER_UNKNOWN;
3057 ret = PAM_SYSTEM_ERR;
3064 * obtain and verify the current password (OLDAUTHTOK) for
3068 if (flags & PAM_PRELIM_CHECK) {
3069 time_t pwdlastset_prelim = 0;
3071 /* instruct user what is happening */
3073 #define greeting _("Changing password for")
3074 Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
3076 _pam_log(ctx, LOG_CRIT,
3077 "password - out of memory");
3083 lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
3084 ret = _winbind_read_password(ctx, lctrl,
3086 _("(current) NT password: "),
3088 (const char **) &pass_old);
3089 TALLOC_FREE(Announce);
3090 if (ret != PAM_SUCCESS) {
3091 _pam_log(ctx, LOG_NOTICE,
3092 "password - (old) token not obtained");
3096 /* verify that this is the password for this user */
3098 ret = winbind_auth_request(ctx, user, pass_old,
3101 &pwdlastset_prelim, NULL);
3103 if (ret != PAM_ACCT_EXPIRED &&
3104 ret != PAM_AUTHTOK_EXPIRED &&
3105 ret != PAM_NEW_AUTHTOK_REQD &&
3106 ret != PAM_SUCCESS) {
3111 pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3112 (void *)pwdlastset_prelim, NULL);
3114 ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
3115 (const void *) pass_old);
3117 if (ret != PAM_SUCCESS) {
3118 _pam_log(ctx, LOG_CRIT,
3119 "failed to set PAM_OLDAUTHTOK");
3121 } else if (flags & PAM_UPDATE_AUTHTOK) {
3123 time_t pwdlastset_update = 0;
3126 * obtain the proposed password
3130 * get the old token back.
3133 ret = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
3135 if (ret != PAM_SUCCESS) {
3136 _pam_log(ctx, LOG_NOTICE,
3137 "user not authenticated");
3141 lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
3143 if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
3144 lctrl |= WINBIND_USE_FIRST_PASS_ARG;
3147 ret = PAM_AUTHTOK_ERR;
3148 while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
3150 * use_authtok is to force the use of a previously entered
3151 * password -- needed for pluggable password strength checking
3154 ret = _winbind_read_password(ctx, lctrl,
3156 _("Enter new NT password: "),
3157 _("Retype new NT password: "),
3158 (const char **)&pass_new);
3160 if (ret != PAM_SUCCESS) {
3161 _pam_log_debug(ctx, LOG_ALERT,
3163 "new password not obtained");
3164 pass_old = NULL;/* tidy up */
3169 * At this point we know who the user is and what they
3170 * propose as their new password. Verify that the new
3171 * password is acceptable.
3174 if (pass_new[0] == '\0') {/* "\0" password = NULL */
3180 * By reaching here we have approved the passwords and must now
3181 * rebuild the password database file.
3183 _pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3184 &pwdlastset_update);
3187 * if cached creds were enabled, make sure to set the
3188 * WINBIND_CACHED_LOGIN bit here in order to have winbindd
3189 * update the cached creds storage - gd
3192 ctx->ctrl |= WINBIND_CACHED_LOGIN;
3195 ret = winbind_chauthtok_request(ctx, user, pass_old,
3196 pass_new, pwdlastset_update);
3198 pass_old = pass_new = NULL;
3202 if (_pam_require_krb5_auth_after_chauthtok(ctx, user)) {
3204 const char *member = NULL;
3205 const char *cctype = NULL;
3206 int warn_pwd_expire;
3207 struct wbcLogonUserInfo *info = NULL;
3208 struct wbcUserPasswordPolicyInfo *policy = NULL;
3210 member = get_member_from_config(ctx);
3211 cctype = get_krb5_cc_type_from_config(ctx);
3212 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
3214 /* Keep WINBIND_CACHED_LOGIN bit for
3215 * authentication after changing the password.
3216 * This will update the cached credentials in case
3217 * that winbindd_dual_pam_chauthtok() fails
3222 ret = winbind_auth_request(ctx, user, pass_new,
3224 &error, &info, &policy,
3225 NULL, &username_ret);
3226 pass_old = pass_new = NULL;
3228 if (ret == PAM_SUCCESS) {
3230 struct wbcAuthUserInfo *user_info = NULL;
3232 if (info && info->info) {
3233 user_info = info->info;
3236 /* warn a user if the password is about to
3238 _pam_warn_password_expiry(ctx, user_info, policy,
3242 /* set some info3 info for other modules in the
3244 _pam_set_data_info3(ctx, user_info);
3246 /* put krb5ccname into env */
3247 _pam_setup_krb5_env(ctx, info);
3250 pam_set_item(pamh, PAM_USER,
3252 _pam_log_debug(ctx, LOG_INFO,
3253 "Returned user was '%s'",
3260 if (info && info->blobs) {
3261 wbcFreeMemory(info->blobs);
3263 wbcFreeMemory(info);
3264 wbcFreeMemory(policy);
3269 ret = PAM_SERVICE_ERR;
3274 /* Deal with offline errors. */
3276 const char *codes[] = {
3277 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3278 "NT_STATUS_NO_LOGON_SERVERS",
3279 "NT_STATUS_ACCESS_DENIED"
3282 for (i=0; i<ARRAY_SIZE(codes); i++) {
3284 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
3290 wbcFreeMemory(error);
3292 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
3301 /* static module data */
3303 struct pam_module _pam_winbind_modstruct = {
3305 pam_sm_authenticate,
3308 pam_sm_open_session,
3309 pam_sm_close_session,
3316 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3317 * Copyright (c) Tim Potter <tpot@samba.org> 2000
3318 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3319 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3320 * Copyright (c) Jan Rêkorajski 1999.
3321 * Copyright (c) Andrew G. Morgan 1996-8.
3322 * Copyright (c) Alex O. Yuriev, 1996.
3323 * Copyright (c) Cristian Gafton 1996.
3324 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3326 * Redistribution and use in source and binary forms, with or without
3327 * modification, are permitted provided that the following conditions
3329 * 1. Redistributions of source code must retain the above copyright
3330 * notice, and the entire permission notice in its entirety,
3331 * including the disclaimer of warranties.
3332 * 2. Redistributions in binary form must reproduce the above copyright
3333 * notice, this list of conditions and the following disclaimer in the
3334 * documentation and/or other materials provided with the distribution.
3335 * 3. The name of the author may not be used to endorse or promote
3336 * products derived from this software without specific prior
3337 * written permission.
3339 * ALTERNATIVELY, this product may be distributed under the terms of
3340 * the GNU Public License, in which case the provisions of the GPL are
3341 * required INSTEAD OF the above restrictions. (This clause is
3342 * necessary due to a potential bad interaction between the GPL and
3343 * the restrictions contained in a BSD-style copyright.)
3345 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3346 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3347 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3348 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3349 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3350 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3351 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3352 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3353 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3354 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3355 * OF THE POSSIBILITY OF SUCH DAMAGE.