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 /* PAM_RADIO_TYPE is linux-only. */
812 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
814 struct pam_message msg, *pmsg;
815 struct pam_response *resp = NULL;
819 prompt = _("Do you want to change your password now?");
821 msg.msg_style = PAM_RADIO_TYPE;
823 ret = converse(ctx->pamh, 1, &pmsg, &resp);
825 if (ret == PAM_SUCCESS) {
826 _pam_log(ctx, LOG_CRIT, "pam_winbind: system error!\n");
830 if (ret != PAM_SUCCESS) {
833 _pam_log(ctx, LOG_CRIT, "Received [%s] reply from application.\n", resp->resp);
835 if (strcasecmp(resp->resp, "yes") == 0) {
839 _pam_drop_reply(resp, 1);
843 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
851 * send a password expiry message if required
853 * @param ctx PAM winbind context.
854 * @param next_change expected (calculated) next expiry date.
855 * @param already_expired pointer to a boolean to indicate if the password is
858 * @return boolean Returns true if message has been sent, false if not.
861 static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
865 bool *already_expired,
869 struct tm tm_now, tm_next_change;
873 if (already_expired) {
874 *already_expired = false;
881 if (next_change <= now) {
882 PAM_WB_REMARK_DIRECT(ctx, "NT_STATUS_PASSWORD_EXPIRED");
883 if (already_expired) {
884 *already_expired = true;
889 if ((next_change < 0) ||
890 (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
894 if ((localtime_r(&now, &tm_now) == NULL) ||
895 (localtime_r(&next_change, &tm_next_change) == NULL)) {
899 days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) -
900 (tm_now.tm_yday+tm_now.tm_year*365);
903 ret = _make_remark(ctx, PAM_TEXT_INFO,
904 _("Your password expires today.\n"));
907 * If change_pwd and already_expired is null.
908 * We are just sending a notification message.
909 * We don't expect any response in this case.
912 if (!change_pwd && !already_expired) {
917 * successfully sent the warning message.
918 * Give the user a chance to change pwd.
920 if (ret == PAM_SUCCESS) {
922 retval = _pam_winbind_change_pwd(ctx);
931 if (days > 0 && days < warn_pwd_expire) {
933 ret = _make_remark_format(ctx, PAM_TEXT_INFO,
934 _("Your password will expire in %d %s.\n"),
935 days, (days > 1) ? _("days"):_("day"));
937 * If change_pwd and already_expired is null.
938 * We are just sending a notification message.
939 * We don't expect any response in this case.
942 if (!change_pwd && !already_expired) {
947 * successfully sent the warning message.
948 * Give the user a chance to change pwd.
950 if (ret == PAM_SUCCESS) {
952 retval = _pam_winbind_change_pwd(ctx);
965 * Send a warning if the password expires in the near future
967 * @param ctx PAM winbind context.
968 * @param response The full authentication response structure.
969 * @param already_expired boolean, is the pwd already expired?
974 static void _pam_warn_password_expiry(struct pwb_context *ctx,
975 const struct wbcAuthUserInfo *info,
976 const struct wbcUserPasswordPolicyInfo *policy,
978 bool *already_expired,
981 time_t now = time(NULL);
982 time_t next_change = 0;
984 if (!info || !policy) {
988 if (already_expired) {
989 *already_expired = false;
996 /* accounts with WBC_ACB_PWNOEXP set never receive a warning */
997 if (info->acct_flags & WBC_ACB_PWNOEXP) {
1001 /* no point in sending a warning if this is a grace logon */
1002 if (PAM_WB_GRACE_LOGON(info->user_flags)) {
1006 /* check if the info3 must change timestamp has been set */
1007 next_change = info->pass_must_change_time;
1009 if (_pam_send_password_expiry_message(ctx, next_change, now,
1016 /* now check for the global password policy */
1017 /* good catch from Ralf Haferkamp: an expiry of "never" is translated
1019 if ((policy->expire == (int64_t)-1) ||
1020 (policy->expire == 0)) {
1024 next_change = info->pass_last_set_time + policy->expire;
1026 if (_pam_send_password_expiry_message(ctx, next_change, now,
1033 /* no warning sent */
1036 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
1039 * Append a string, making sure not to overflow and to always return a
1040 * NULL-terminated string.
1042 * @param dest Destination string buffer (must already be NULL-terminated).
1043 * @param src Source string buffer.
1044 * @param dest_buffer_size Size of dest buffer in bytes.
1046 * @return false if dest buffer is not big enough (no bytes copied), true on
1050 static bool safe_append_string(char *dest,
1052 int dest_buffer_size)
1054 int dest_length = strlen(dest);
1055 int src_length = strlen(src);
1057 if (dest_length + src_length + 1 > dest_buffer_size) {
1061 memcpy(dest + dest_length, src, src_length + 1);
1066 * Convert a names into a SID string, appending it to a buffer.
1068 * @param ctx PAM winbind context.
1069 * @param user User in PAM request.
1070 * @param name Name to convert.
1071 * @param sid_list_buffer Where to append the string sid.
1072 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1074 * @return false on failure, true on success.
1076 static bool winbind_name_to_sid_string(struct pwb_context *ctx,
1079 char *sid_list_buffer,
1080 int sid_list_buffer_size)
1082 const char* sid_string = NULL;
1083 char *sid_str = NULL;
1086 if (IS_SID_STRING(name)) {
1090 struct wbcDomainSid sid;
1091 enum wbcSidType type;
1093 _pam_log_debug(ctx, LOG_DEBUG,
1094 "no sid given, looking up: %s\n", name);
1096 wbc_status = wbcLookupName("", name, &sid, &type);
1097 if (!WBC_ERROR_IS_OK(wbc_status)) {
1098 _pam_log(ctx, LOG_INFO,
1099 "could not lookup name: %s\n", name);
1103 wbc_status = wbcSidToString(&sid, &sid_str);
1104 if (!WBC_ERROR_IS_OK(wbc_status)) {
1108 sid_string = sid_str;
1111 if (!safe_append_string(sid_list_buffer, sid_string,
1112 sid_list_buffer_size)) {
1113 wbcFreeMemory(sid_str);
1117 wbcFreeMemory(sid_str);
1122 * Convert a list of names into a list of sids.
1124 * @param ctx PAM winbind context.
1125 * @param user User in PAM request.
1126 * @param name_list List of names or string sids, separated by commas.
1127 * @param sid_list_buffer Where to put the list of string sids.
1128 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1130 * @return false on failure, true on success.
1132 static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
1134 const char *name_list,
1135 char *sid_list_buffer,
1136 int sid_list_buffer_size)
1138 bool result = false;
1139 char *current_name = NULL;
1140 const char *search_location;
1143 if (sid_list_buffer_size > 0) {
1144 sid_list_buffer[0] = 0;
1147 search_location = name_list;
1148 while ((comma = strstr(search_location, ",")) != NULL) {
1149 current_name = strndup(search_location,
1150 comma - search_location);
1151 if (NULL == current_name) {
1155 if (!winbind_name_to_sid_string(ctx, user,
1158 sid_list_buffer_size)) {
1160 * If one group name failed, we must not fail
1161 * the authentication totally, continue with
1162 * the following group names. If user belongs to
1163 * one of the valid groups, we must allow it
1167 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1168 "check if group %s is valid group.", current_name,
1170 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1171 "to sid, please contact your administrator to see "
1172 "if group %s is valid."), current_name, current_name);
1173 SAFE_FREE(current_name);
1174 search_location = comma + 1;
1178 SAFE_FREE(current_name);
1180 if (!safe_append_string(sid_list_buffer, ",",
1181 sid_list_buffer_size)) {
1185 search_location = comma + 1;
1188 if (!winbind_name_to_sid_string(ctx, user, search_location,
1190 sid_list_buffer_size)) {
1191 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1192 "check if group %s is valid group.", search_location,
1194 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1195 "to sid, please contact your administrator to see "
1196 "if group %s is valid."), search_location, search_location);
1202 SAFE_FREE(current_name);
1207 * put krb5ccname variable into environment
1209 * @param ctx PAM winbind context.
1210 * @param krb5ccname env variable retrieved from winbindd.
1215 static void _pam_setup_krb5_env(struct pwb_context *ctx,
1216 struct wbcLogonUserInfo *info)
1221 const char *krb5ccname = NULL;
1223 if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
1231 for (i=0; i < info->num_blobs; i++) {
1232 if (strcasecmp(info->blobs[i].name, "krb5ccname") == 0) {
1233 krb5ccname = (const char *)info->blobs[i].blob.data;
1238 if (!krb5ccname || (strlen(krb5ccname) == 0)) {
1242 _pam_log_debug(ctx, LOG_DEBUG,
1243 "request returned KRB5CCNAME: %s", krb5ccname);
1245 if (snprintf(var, sizeof(var), "KRB5CCNAME=%s", krb5ccname) == -1) {
1249 ret = pam_putenv(ctx->pamh, var);
1251 _pam_log(ctx, LOG_ERR,
1252 "failed to set KRB5CCNAME to %s: %s",
1253 var, pam_strerror(ctx->pamh, ret));
1258 * Copy unix username if available (further processed in PAM).
1260 * @param ctx PAM winbind context
1261 * @param user_ret A pointer that holds a pointer to a string
1262 * @param unix_username A username
1267 static void _pam_setup_unix_username(struct pwb_context *ctx,
1269 struct wbcLogonUserInfo *info)
1271 const char *unix_username = NULL;
1274 if (!user_ret || !info) {
1278 for (i=0; i < info->num_blobs; i++) {
1279 if (strcasecmp(info->blobs[i].name, "unix_username") == 0) {
1280 unix_username = (const char *)info->blobs[i].blob.data;
1285 if (!unix_username || !unix_username[0]) {
1289 *user_ret = strdup(unix_username);
1293 * Set string into the PAM stack.
1295 * @param ctx PAM winbind context.
1296 * @param data_name Key name for pam_set_data.
1297 * @param value String value.
1302 static void _pam_set_data_string(struct pwb_context *ctx,
1303 const char *data_name,
1308 if (!data_name || !value || (strlen(data_name) == 0) ||
1309 (strlen(value) == 0)) {
1313 ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
1314 _pam_winbind_cleanup_func);
1316 _pam_log_debug(ctx, LOG_DEBUG,
1317 "Could not set data %s: %s\n",
1318 data_name, pam_strerror(ctx->pamh, ret));
1323 * Set info3 strings into the PAM stack.
1325 * @param ctx PAM winbind context.
1326 * @param data_name Key name for pam_set_data.
1327 * @param value String value.
1332 static void _pam_set_data_info3(struct pwb_context *ctx,
1333 const struct wbcAuthUserInfo *info)
1335 _pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
1336 info->home_directory);
1337 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
1338 info->logon_script);
1339 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
1340 info->logon_server);
1341 _pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
1342 info->profile_path);
1346 * Free info3 strings in the PAM stack.
1348 * @param pamh PAM handle
1353 static void _pam_free_data_info3(pam_handle_t *pamh)
1355 pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1356 pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1357 pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1358 pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1362 * Send PAM_ERROR_MSG for cached or grace logons.
1364 * @param ctx PAM winbind context.
1365 * @param username User in PAM request.
1366 * @param info3_user_flgs Info3 flags containing logon type bits.
1371 static void _pam_warn_logon_type(struct pwb_context *ctx,
1372 const char *username,
1373 uint32_t info3_user_flgs)
1375 /* inform about logon type */
1376 if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1378 _make_remark(ctx, PAM_ERROR_MSG,
1380 "Please change your password as soon you're "
1382 _pam_log_debug(ctx, LOG_DEBUG,
1383 "User %s logged on using grace logon\n",
1386 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1388 _make_remark(ctx, PAM_ERROR_MSG,
1389 _("Domain Controller unreachable, "
1390 "using cached credentials instead. "
1391 "Network resources may be unavailable"));
1392 _pam_log_debug(ctx, LOG_DEBUG,
1393 "User %s logged on using cached credentials\n",
1399 * Send PAM_ERROR_MSG for krb5 errors.
1401 * @param ctx PAM winbind context.
1402 * @param username User in PAM request.
1403 * @param info3_user_flgs Info3 flags containing logon type bits.
1408 static void _pam_warn_krb5_failure(struct pwb_context *ctx,
1409 const char *username,
1410 uint32_t info3_user_flgs)
1412 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1413 _make_remark(ctx, PAM_ERROR_MSG,
1414 _("Failed to establish your Kerberos Ticket cache "
1415 "due time differences\n"
1416 "with the domain controller. "
1417 "Please verify the system time.\n"));
1418 _pam_log_debug(ctx, LOG_DEBUG,
1419 "User %s: Clock skew when getting Krb5 TGT\n",
1424 static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
1425 const struct wbcAuthErrorInfo *e,
1426 const char *nt_status_string,
1429 const char *ntstatus = NULL;
1430 const char *error_string = NULL;
1432 if (!e || !pam_error) {
1436 ntstatus = e->nt_string;
1441 if (strcasecmp(ntstatus, nt_status_string) == 0) {
1443 error_string = _get_ntstatus_error_string(nt_status_string);
1445 _make_remark(ctx, PAM_ERROR_MSG, error_string);
1446 *pam_error = e->pam_error;
1450 if (e->display_string) {
1451 _make_remark(ctx, PAM_ERROR_MSG, e->display_string);
1452 *pam_error = e->pam_error;
1456 _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
1457 *pam_error = e->pam_error;
1466 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1468 * @param i The wbcUserPasswordPolicyInfo struct.
1470 * @return string (caller needs to talloc_free).
1473 static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
1474 struct wbcUserPasswordPolicyInfo *i)
1482 str = talloc_asprintf(ctx, _("Your password "));
1487 if (i->min_length_password > 0) {
1488 str = talloc_asprintf_append(str,
1489 _("must be at least %d characters; "),
1490 i->min_length_password);
1496 if (i->password_history > 0) {
1497 str = talloc_asprintf_append(str,
1498 _("cannot repeat any of your previous %d "
1500 i->password_history);
1506 if (i->password_properties & WBC_DOMAIN_PASSWORD_COMPLEX) {
1507 str = talloc_asprintf_append(str,
1508 _("must contain capitals, numerals "
1510 "and cannot contain your account "
1517 str = talloc_asprintf_append(str,
1518 _("Please type a different password. "
1519 "Type a password which meets these requirements in "
1520 "both text boxes."));
1532 static int _pam_create_homedir(struct pwb_context *ctx,
1533 const char *dirname,
1538 if (stat(dirname, &sbuf) == 0) {
1542 if (mkdir(dirname, mode) != 0) {
1544 _make_remark_format(ctx, PAM_TEXT_INFO,
1545 _("Creating directory: %s failed: %s"),
1546 dirname, strerror(errno));
1547 _pam_log(ctx, LOG_ERR, "could not create dir: %s (%s)",
1548 dirname, strerror(errno));
1549 return PAM_PERM_DENIED;
1555 static int _pam_chown_homedir(struct pwb_context *ctx,
1556 const char *dirname,
1560 if (chown(dirname, uid, gid) != 0) {
1561 _pam_log(ctx, LOG_ERR, "failed to chown user homedir: %s (%s)",
1562 dirname, strerror(errno));
1563 return PAM_PERM_DENIED;
1569 static int _pam_mkhomedir(struct pwb_context *ctx)
1571 struct passwd *pwd = NULL;
1573 char *create_dir = NULL;
1574 char *user_dir = NULL;
1576 const char *username;
1578 char *safe_ptr = NULL;
1581 /* Get the username */
1582 ret = pam_get_user(ctx->pamh, &username, NULL);
1583 if ((ret != PAM_SUCCESS) || (!username)) {
1584 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1585 return PAM_SERVICE_ERR;
1588 pwd = getpwnam(username);
1590 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1591 return PAM_USER_UNKNOWN;
1593 _pam_log_debug(ctx, LOG_DEBUG, "homedir is: %s", pwd->pw_dir);
1595 ret = _pam_create_homedir(ctx, pwd->pw_dir, 0700);
1596 if (ret == PAM_SUCCESS) {
1597 ret = _pam_chown_homedir(ctx, pwd->pw_dir,
1602 if (ret == PAM_SUCCESS) {
1606 /* maybe we need to create parent dirs */
1607 create_dir = talloc_strdup(ctx, "/");
1612 /* find final directory */
1613 user_dir = strrchr(pwd->pw_dir, '/');
1619 _pam_log(ctx, LOG_DEBUG, "final directory: %s", user_dir);
1623 while ((token = strtok_r(p, "/", &safe_ptr)) != NULL) {
1629 _pam_log_debug(ctx, LOG_DEBUG, "token is %s", token);
1631 create_dir = talloc_asprintf_append(create_dir, "%s/", token);
1635 _pam_log_debug(ctx, LOG_DEBUG, "current_dir is %s", create_dir);
1637 if (strcmp(token, user_dir) == 0) {
1638 _pam_log_debug(ctx, LOG_DEBUG, "assuming last directory: %s", token);
1642 ret = _pam_create_homedir(ctx, create_dir, mode);
1648 return _pam_chown_homedir(ctx, create_dir,
1653 /* talk to winbindd */
1654 static int winbind_auth_request(struct pwb_context *ctx,
1659 const int warn_pwd_expire,
1660 struct wbcAuthErrorInfo **p_error,
1661 struct wbcLogonUserInfo **p_info,
1662 struct wbcUserPasswordPolicyInfo **p_policy,
1663 time_t *pwd_last_set,
1668 struct wbcLogonUserParams logon;
1669 char membership_of[1024];
1670 uid_t user_uid = -1;
1671 uint32_t flags = WBFLAG_PAM_INFO3_TEXT |
1672 WBFLAG_PAM_GET_PWD_POLICY;
1674 struct wbcLogonUserInfo *info = NULL;
1675 struct wbcAuthUserInfo *user_info = NULL;
1676 struct wbcAuthErrorInfo *error = NULL;
1677 struct wbcUserPasswordPolicyInfo *policy = NULL;
1679 int ret = PAM_AUTH_ERR;
1681 const char *codes[] = {
1682 "NT_STATUS_PASSWORD_EXPIRED",
1683 "NT_STATUS_PASSWORD_MUST_CHANGE",
1684 "NT_STATUS_INVALID_WORKSTATION",
1685 "NT_STATUS_INVALID_LOGON_HOURS",
1686 "NT_STATUS_ACCOUNT_EXPIRED",
1687 "NT_STATUS_ACCOUNT_DISABLED",
1688 "NT_STATUS_ACCOUNT_LOCKED_OUT",
1689 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1690 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1691 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1692 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1693 "NT_STATUS_NO_LOGON_SERVERS",
1694 "NT_STATUS_WRONG_PASSWORD",
1695 "NT_STATUS_ACCESS_DENIED"
1702 /* Krb5 auth always has to go against the KDC of the user's realm */
1704 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1705 flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
1708 if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1709 struct passwd *pwd = NULL;
1711 pwd = getpwnam(user);
1713 return PAM_USER_UNKNOWN;
1715 user_uid = pwd->pw_uid;
1718 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1720 _pam_log_debug(ctx, LOG_DEBUG,
1721 "enabling krb5 login flag\n");
1723 flags |= WBFLAG_PAM_KRB5 |
1724 WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1727 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1728 _pam_log_debug(ctx, LOG_DEBUG,
1729 "enabling cached login flag\n");
1730 flags |= WBFLAG_PAM_CACHED_LOGIN;
1735 flags |= WBFLAG_PAM_UNIX_NAME;
1738 if (cctype != NULL) {
1739 _pam_log_debug(ctx, LOG_DEBUG,
1740 "enabling request for a %s krb5 ccache\n",
1744 if (member != NULL) {
1746 ZERO_STRUCT(membership_of);
1748 if (!winbind_name_list_to_sid_string_list(ctx, user, member,
1750 sizeof(membership_of))) {
1751 _pam_log_debug(ctx, LOG_ERR,
1752 "failed to serialize membership of sid "
1753 "\"%s\"\n", member);
1754 return PAM_AUTH_ERR;
1760 logon.username = user;
1761 logon.password = pass;
1764 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1770 if (!WBC_ERROR_IS_OK(wbc_status)) {
1775 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1781 if (!WBC_ERROR_IS_OK(wbc_status)) {
1785 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1789 (uint8_t *)&user_uid,
1791 if (!WBC_ERROR_IS_OK(wbc_status)) {
1796 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1800 (uint8_t *)membership_of,
1801 sizeof(membership_of));
1802 if (!WBC_ERROR_IS_OK(wbc_status)) {
1807 wbc_status = wbcLogonUser(&logon, &info, &error, &policy);
1808 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1809 user, "wbcLogonUser");
1810 wbcFreeMemory(logon.blobs);
1813 if (info && info->info) {
1814 user_info = info->info;
1817 if (pwd_last_set && user_info) {
1818 *pwd_last_set = user_info->pass_last_set_time;
1821 if (p_info && info) {
1825 if (p_policy && policy) {
1829 if (p_error && error) {
1830 /* We want to process the error in the caller. */
1835 for (i=0; i<ARRAY_SIZE(codes); i++) {
1837 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1843 if ((ret == PAM_SUCCESS) && user_info && policy && info) {
1845 bool already_expired = false;
1846 bool change_pwd = false;
1848 /* warn a user if the password is about to expire soon */
1849 _pam_warn_password_expiry(ctx, user_info, policy,
1854 if (already_expired == true) {
1856 SMB_TIME_T last_set = user_info->pass_last_set_time;
1858 _pam_log_debug(ctx, LOG_DEBUG,
1859 "Password has expired "
1860 "(Password was last set: %lld, "
1861 "the policy says it should expire here "
1862 "%lld (now it's: %ld))\n",
1863 (long long int)last_set,
1864 (long long int)last_set +
1868 return PAM_AUTHTOK_EXPIRED;
1872 ret = PAM_NEW_AUTHTOK_REQD;
1876 /* inform about logon type */
1877 _pam_warn_logon_type(ctx, user, user_info->user_flags);
1879 /* inform about krb5 failures */
1880 _pam_warn_krb5_failure(ctx, user, user_info->user_flags);
1882 /* set some info3 info for other modules in the stack */
1883 _pam_set_data_info3(ctx, user_info);
1885 /* put krb5ccname into env */
1886 _pam_setup_krb5_env(ctx, info);
1888 /* If winbindd returned a username, return the pointer to it
1890 _pam_setup_unix_username(ctx, user_ret, info);
1895 wbcFreeMemory(logon.blobs);
1897 if (info && info->blobs && !p_info) {
1898 wbcFreeMemory(info->blobs);
1900 if (error && !p_error) {
1901 wbcFreeMemory(error);
1903 if (info && !p_info) {
1904 wbcFreeMemory(info);
1906 if (policy && !p_policy) {
1907 wbcFreeMemory(policy);
1913 /* talk to winbindd */
1914 static int winbind_chauthtok_request(struct pwb_context *ctx,
1916 const char *oldpass,
1917 const char *newpass,
1918 time_t pwd_last_set)
1921 struct wbcChangePasswordParams params;
1922 struct wbcAuthErrorInfo *error = NULL;
1923 struct wbcUserPasswordPolicyInfo *policy = NULL;
1924 enum wbcPasswordChangeRejectReason reject_reason = -1;
1928 const char *codes[] = {
1929 "NT_STATUS_BACKUP_CONTROLLER",
1930 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1931 "NT_STATUS_NO_LOGON_SERVERS",
1932 "NT_STATUS_ACCESS_DENIED",
1933 "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1934 "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1935 "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1937 int ret = PAM_AUTH_ERR;
1939 ZERO_STRUCT(params);
1941 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1942 flags |= WBFLAG_PAM_KRB5 |
1943 WBFLAG_PAM_CONTACT_TRUSTDOM;
1946 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1947 flags |= WBFLAG_PAM_CACHED_LOGIN;
1950 params.account_name = user;
1951 params.level = WBC_AUTH_USER_LEVEL_PLAIN;
1952 params.old_password.plaintext = oldpass;
1953 params.new_password.plaintext = newpass;
1954 params.flags = flags;
1956 wbc_status = wbcChangeUserPasswordEx(¶ms, &error, &reject_reason, &policy);
1957 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1958 user, "wbcChangeUserPasswordEx");
1960 if (WBC_ERROR_IS_OK(wbc_status)) {
1961 _pam_log(ctx, LOG_NOTICE,
1962 "user '%s' password changed", user);
1967 wbcFreeMemory(policy);
1971 for (i=0; i<ARRAY_SIZE(codes); i++) {
1973 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1979 if (!strcasecmp(error->nt_string,
1980 "NT_STATUS_PASSWORD_RESTRICTION")) {
1982 char *pwd_restriction_string = NULL;
1983 SMB_TIME_T min_pwd_age = 0;
1986 min_pwd_age = policy->min_passwordage;
1989 /* FIXME: avoid to send multiple PAM messages after another */
1990 switch (reject_reason) {
1993 case WBC_PWD_CHANGE_NO_ERROR:
1994 if ((min_pwd_age > 0) &&
1995 (pwd_last_set + min_pwd_age > time(NULL))) {
1996 PAM_WB_REMARK_DIRECT(ctx,
1997 "NT_STATUS_PWD_TOO_RECENT");
2000 case WBC_PWD_CHANGE_PASSWORD_TOO_SHORT:
2001 PAM_WB_REMARK_DIRECT(ctx,
2002 "NT_STATUS_PWD_TOO_SHORT");
2004 case WBC_PWD_CHANGE_PWD_IN_HISTORY:
2005 PAM_WB_REMARK_DIRECT(ctx,
2006 "NT_STATUS_PWD_HISTORY_CONFLICT");
2008 case WBC_PWD_CHANGE_NOT_COMPLEX:
2009 _make_remark(ctx, PAM_ERROR_MSG,
2010 _("Password does not meet "
2011 "complexity requirements"));
2014 _pam_log_debug(ctx, LOG_DEBUG,
2015 "unknown password change "
2016 "reject reason: %d",
2021 pwd_restriction_string =
2022 _pam_compose_pwd_restriction_string(ctx, policy);
2023 if (pwd_restriction_string) {
2024 _make_remark(ctx, PAM_ERROR_MSG,
2025 pwd_restriction_string);
2026 TALLOC_FREE(pwd_restriction_string);
2030 wbcFreeMemory(error);
2031 wbcFreeMemory(policy);
2037 * Checks if a user has an account
2040 * 1 = User not found
2044 static int valid_user(struct pwb_context *ctx,
2047 /* check not only if the user is available over NSS calls, also make
2048 * sure it's really a winbind user, this is important when stacking PAM
2049 * modules in the 'account' or 'password' facility. */
2052 struct passwd *pwd = NULL;
2053 struct passwd *wb_pwd = NULL;
2055 pwd = getpwnam(user);
2060 wbc_status = wbcGetpwnam(user, &wb_pwd);
2061 wbcFreeMemory(wb_pwd);
2062 if (!WBC_ERROR_IS_OK(wbc_status)) {
2063 _pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
2064 wbcErrorString(wbc_status));
2067 switch (wbc_status) {
2068 case WBC_ERR_UNKNOWN_USER:
2070 case WBC_ERR_SUCCESS:
2078 static char *_pam_delete(register char *xx)
2086 * obtain a password from the user
2089 static int _winbind_read_password(struct pwb_context *ctx,
2091 const char *comment,
2092 const char *prompt1,
2093 const char *prompt2,
2101 _pam_log(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
2104 * make sure nothing inappropriate gets returned
2107 *pass = token = NULL;
2110 * which authentication token are we getting?
2113 if (on(WINBIND__OLD_PASSWORD, ctrl)) {
2114 authtok_flag = PAM_OLDAUTHTOK;
2116 authtok_flag = PAM_AUTHTOK;
2120 * should we obtain the password from a PAM item ?
2123 if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
2124 on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2125 retval = _pam_get_item(ctx->pamh, authtok_flag, &item);
2126 if (retval != PAM_SUCCESS) {
2128 _pam_log(ctx, LOG_ALERT,
2129 "pam_get_item returned error "
2130 "to unix-read-password");
2132 } else if (item != NULL) { /* we have a password! */
2135 _pam_log(ctx, LOG_DEBUG,
2136 "pam_get_item returned a password");
2138 } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2139 return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
2140 } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
2141 && off(WINBIND__OLD_PASSWORD, ctrl)) {
2142 return PAM_AUTHTOK_RECOVER_ERR;
2146 * getting here implies we will have to get the password from the
2151 struct pam_message msg[3], *pmsg[3];
2152 struct pam_response *resp;
2155 /* prepare to converse */
2157 if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
2159 msg[0].msg_style = PAM_TEXT_INFO;
2160 msg[0].msg = discard_const_p(char, comment);
2167 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2168 msg[i++].msg = discard_const_p(char, prompt1);
2171 if (prompt2 != NULL) {
2173 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2174 msg[i++].msg = discard_const_p(char, prompt2);
2177 /* so call the conversation expecting i responses */
2179 retval = converse(ctx->pamh, i, pmsg, &resp);
2181 if (retval == PAM_SUCCESS) {
2182 retval = PAM_AUTHTOK_RECOVER_ERR;
2186 if (retval != PAM_SUCCESS) {
2187 _pam_drop_reply(resp, i);
2191 /* interpret the response */
2193 token = x_strdup(resp[i - replies].resp);
2195 _pam_log(ctx, LOG_NOTICE,
2196 "could not recover "
2197 "authentication token");
2198 retval = PAM_AUTHTOK_RECOVER_ERR;
2203 /* verify that password entered correctly */
2204 if (!resp[i - 1].resp ||
2205 strcmp(token, resp[i - 1].resp)) {
2206 _pam_delete(token); /* mistyped */
2207 retval = PAM_AUTHTOK_RECOVER_ERR;
2208 _make_remark(ctx, PAM_ERROR_MSG,
2214 * tidy up the conversation (resp_retcode) is ignored
2215 * -- what is it for anyway? AGM
2217 _pam_drop_reply(resp, i);
2221 if (retval != PAM_SUCCESS) {
2222 _pam_log_debug(ctx, LOG_DEBUG,
2223 "unable to obtain a password");
2226 /* 'token' is the entered password */
2228 /* we store this password as an item */
2230 retval = pam_set_item(ctx->pamh, authtok_flag, token);
2231 _pam_delete(token); /* clean it up */
2232 if (retval != PAM_SUCCESS ||
2233 (retval = _pam_get_item(ctx->pamh, authtok_flag, &item)) != PAM_SUCCESS) {
2235 _pam_log(ctx, LOG_CRIT, "error manipulating password");
2241 item = NULL; /* break link to password */
2246 static const char *get_conf_item_string(struct pwb_context *ctx,
2251 const char *parm_opt = NULL;
2253 if (!(ctx->ctrl & config_flag)) {
2257 /* let the pam opt take precedence over the pam_winbind.conf option */
2258 for (i=0; i<ctx->argc; i++) {
2260 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2263 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2264 _pam_log(ctx, LOG_INFO,
2265 "no \"=\" delimiter for \"%s\" found\n",
2269 _pam_log_debug(ctx, LOG_INFO,
2270 "PAM config: %s '%s'\n", item, p+1);
2278 key = talloc_asprintf(ctx, "global:%s", item);
2283 parm_opt = iniparser_getstr(ctx->dict, key);
2286 _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
2293 static int get_config_item_int(struct pwb_context *ctx,
2297 int i, parm_opt = -1;
2299 if (!(ctx->ctrl & config_flag)) {
2303 /* let the pam opt take precedence over the pam_winbind.conf option */
2304 for (i = 0; i < ctx->argc; i++) {
2306 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2309 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2310 _pam_log(ctx, LOG_INFO,
2311 "no \"=\" delimiter for \"%s\" found\n",
2315 parm_opt = atoi(p + 1);
2316 _pam_log_debug(ctx, LOG_INFO,
2317 "PAM config: %s '%d'\n",
2326 key = talloc_asprintf(ctx, "global:%s", item);
2331 parm_opt = iniparser_getint(ctx->dict, key, -1);
2334 _pam_log_debug(ctx, LOG_INFO,
2335 "CONFIG file: %s '%d'\n",
2342 static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
2344 return get_conf_item_string(ctx, "krb5_ccache_type",
2345 WINBIND_KRB5_CCACHE_TYPE);
2348 static const char *get_member_from_config(struct pwb_context *ctx)
2350 const char *ret = NULL;
2351 ret = get_conf_item_string(ctx, "require_membership_of",
2352 WINBIND_REQUIRED_MEMBERSHIP);
2356 return get_conf_item_string(ctx, "require-membership-of",
2357 WINBIND_REQUIRED_MEMBERSHIP);
2360 static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
2363 ret = get_config_item_int(ctx, "warn_pwd_expire",
2364 WINBIND_WARN_PWD_EXPIRE);
2365 /* no or broken setting */
2367 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
2373 * Retrieve the winbind separator.
2375 * @param ctx PAM winbind context.
2377 * @return string separator character. NULL on failure.
2380 static char winbind_get_separator(struct pwb_context *ctx)
2383 static struct wbcInterfaceDetails *details = NULL;
2385 wbc_status = wbcInterfaceDetails(&details);
2386 if (!WBC_ERROR_IS_OK(wbc_status)) {
2387 _pam_log(ctx, LOG_ERR,
2388 "Could not retrieve winbind interface details: %s",
2389 wbcErrorString(wbc_status));
2397 return details->winbind_separator;
2402 * Convert a upn to a name.
2404 * @param ctx PAM winbind context.
2405 * @param upn USer UPN to be trabslated.
2407 * @return converted name. NULL pointer on failure. Caller needs to free.
2410 static char* winbind_upn_to_username(struct pwb_context *ctx,
2414 wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
2415 struct wbcDomainSid sid;
2416 enum wbcSidType type;
2421 /* This cannot work when the winbind separator = @ */
2423 sep = winbind_get_separator(ctx);
2424 if (!sep || sep == '@') {
2428 name = talloc_strdup(ctx, upn);
2432 if ((p = strchr(name, '@')) != NULL) {
2437 /* Convert the UPN to a SID */
2439 wbc_status = wbcLookupName(domain, name, &sid, &type);
2440 if (!WBC_ERROR_IS_OK(wbc_status)) {
2444 /* Convert the the SID back to the sAMAccountName */
2446 wbc_status = wbcLookupSid(&sid, &domain, &name, &type);
2447 if (!WBC_ERROR_IS_OK(wbc_status)) {
2451 return talloc_asprintf(ctx, "%s\\%s", domain, name);
2454 static int _pam_delete_cred(pam_handle_t *pamh, int flags,
2455 int argc, const char **argv)
2457 int retval = PAM_SUCCESS;
2458 struct pwb_context *ctx = NULL;
2459 struct wbcLogoffUserParams logoff;
2460 struct wbcAuthErrorInfo *error = NULL;
2462 wbcErr wbc_status = WBC_ERR_SUCCESS;
2464 ZERO_STRUCT(logoff);
2466 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2471 _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
2473 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2475 /* destroy the ccache here */
2477 uint32_t wbc_flags = 0;
2478 const char *ccname = NULL;
2479 struct passwd *pwd = NULL;
2481 retval = pam_get_user(pamh, &user, _("Username: "));
2483 _pam_log(ctx, LOG_ERR,
2484 "could not identify user");
2489 _pam_log(ctx, LOG_ERR,
2490 "username was NULL!");
2491 retval = PAM_USER_UNKNOWN;
2495 _pam_log_debug(ctx, LOG_DEBUG,
2496 "username [%s] obtained", user);
2498 ccname = pam_getenv(pamh, "KRB5CCNAME");
2499 if (ccname == NULL) {
2500 _pam_log_debug(ctx, LOG_DEBUG,
2501 "user has no KRB5CCNAME environment");
2504 pwd = getpwnam(user);
2506 retval = PAM_USER_UNKNOWN;
2510 wbc_flags = WBFLAG_PAM_KRB5 |
2511 WBFLAG_PAM_CONTACT_TRUSTDOM;
2513 logoff.username = user;
2516 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2522 if (!WBC_ERROR_IS_OK(wbc_status)) {
2527 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2531 (uint8_t *)&wbc_flags,
2533 if (!WBC_ERROR_IS_OK(wbc_status)) {
2537 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2541 (uint8_t *)&pwd->pw_uid,
2542 sizeof(pwd->pw_uid));
2543 if (!WBC_ERROR_IS_OK(wbc_status)) {
2547 wbc_status = wbcLogoffUserEx(&logoff, &error);
2548 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2549 user, "wbcLogoffUser");
2550 wbcFreeMemory(error);
2551 wbcFreeMemory(logoff.blobs);
2552 logoff.blobs = NULL;
2554 if (!WBC_ERROR_IS_OK(wbc_status)) {
2555 _pam_log(ctx, LOG_INFO,
2556 "failed to logoff user %s: %s\n",
2557 user, wbcErrorString(wbc_status));
2563 wbcFreeMemory(logoff.blobs);
2566 if (!WBC_ERROR_IS_OK(wbc_status)) {
2567 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2568 user, "wbcLogoffUser");
2572 * Delete the krb5 ccname variable from the PAM environment
2573 * if it was set by winbind.
2575 if ((ctx->ctrl & WINBIND_KRB5_AUTH) && pam_getenv(pamh, "KRB5CCNAME")) {
2576 pam_putenv(pamh, "KRB5CCNAME");
2579 _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx, retval);
2587 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
2588 int argc, const char **argv)
2590 const char *username;
2591 const char *password;
2592 const char *member = NULL;
2593 const char *cctype = NULL;
2594 int warn_pwd_expire;
2595 int retval = PAM_AUTH_ERR;
2596 char *username_ret = NULL;
2597 char *new_authtok_required = NULL;
2598 char *real_username = NULL;
2599 struct pwb_context *ctx = NULL;
2601 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2606 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
2608 /* Get the username */
2609 retval = pam_get_user(pamh, &username, NULL);
2610 if ((retval != PAM_SUCCESS) || (!username)) {
2611 _pam_log_debug(ctx, LOG_DEBUG,
2612 "can not get the username");
2613 retval = PAM_SERVICE_ERR;
2619 /* Decode the user name since AIX does not support logn user
2620 names by default. The name is encoded as _#uid. */
2622 if (username[0] == '_') {
2623 uid_t id = atoi(&username[1]);
2624 struct passwd *pw = NULL;
2626 if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
2627 real_username = strdup(pw->pw_name);
2632 if (!real_username) {
2633 /* Just making a copy of the username we got from PAM */
2634 if ((real_username = strdup(username)) == NULL) {
2635 _pam_log_debug(ctx, LOG_DEBUG,
2636 "memory allocation failure when copying "
2638 retval = PAM_SERVICE_ERR;
2643 /* Maybe this was a UPN */
2645 if (strchr(real_username, '@') != NULL) {
2646 char *samaccountname = NULL;
2648 samaccountname = winbind_upn_to_username(ctx,
2650 if (samaccountname) {
2651 free(real_username);
2652 real_username = strdup(samaccountname);
2656 retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
2657 _("Password: "), NULL,
2660 if (retval != PAM_SUCCESS) {
2661 _pam_log(ctx, LOG_ERR,
2662 "Could not retrieve user's password");
2663 retval = PAM_AUTHTOK_ERR;
2667 /* Let's not give too much away in the log file */
2669 #ifdef DEBUG_PASSWORD
2670 _pam_log_debug(ctx, LOG_INFO,
2671 "Verify user '%s' with password '%s'",
2672 real_username, password);
2674 _pam_log_debug(ctx, LOG_INFO,
2675 "Verify user '%s'", real_username);
2678 member = get_member_from_config(ctx);
2679 cctype = get_krb5_cc_type_from_config(ctx);
2680 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2682 /* Now use the username to look up password */
2683 retval = winbind_auth_request(ctx, real_username, password,
2684 member, cctype, warn_pwd_expire,
2686 NULL, &username_ret);
2688 if (retval == PAM_NEW_AUTHTOK_REQD ||
2689 retval == PAM_AUTHTOK_EXPIRED) {
2691 char *new_authtok_required_during_auth = NULL;
2693 new_authtok_required = talloc_asprintf(NULL, "%d", retval);
2694 if (!new_authtok_required) {
2695 retval = PAM_BUF_ERR;
2699 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2700 new_authtok_required,
2701 _pam_winbind_cleanup_func);
2703 retval = PAM_SUCCESS;
2705 new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
2706 if (!new_authtok_required_during_auth) {
2707 retval = PAM_BUF_ERR;
2711 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2712 new_authtok_required_during_auth,
2713 _pam_winbind_cleanup_func);
2720 pam_set_item (pamh, PAM_USER, username_ret);
2721 _pam_log_debug(ctx, LOG_INFO,
2722 "Returned user was '%s'", username_ret);
2726 if (real_username) {
2727 free(real_username);
2730 if (!new_authtok_required) {
2731 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2734 if (retval != PAM_SUCCESS) {
2735 _pam_free_data_info3(pamh);
2738 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
2746 int pam_sm_setcred(pam_handle_t *pamh, int flags,
2747 int argc, const char **argv)
2749 int ret = PAM_SYSTEM_ERR;
2750 struct pwb_context *ctx = NULL;
2752 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2757 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
2759 switch (flags & ~PAM_SILENT) {
2761 case PAM_DELETE_CRED:
2762 ret = _pam_delete_cred(pamh, flags, argc, argv);
2764 case PAM_REFRESH_CRED:
2765 _pam_log_debug(ctx, LOG_WARNING,
2766 "PAM_REFRESH_CRED not implemented");
2769 case PAM_REINITIALIZE_CRED:
2770 _pam_log_debug(ctx, LOG_WARNING,
2771 "PAM_REINITIALIZE_CRED not implemented");
2774 case PAM_ESTABLISH_CRED:
2775 _pam_log_debug(ctx, LOG_WARNING,
2776 "PAM_ESTABLISH_CRED not implemented");
2780 ret = PAM_SYSTEM_ERR;
2786 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
2794 * Account management. We want to verify that the account exists
2795 * before returning PAM_SUCCESS
2798 int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2799 int argc, const char **argv)
2801 const char *username;
2802 int ret = PAM_USER_UNKNOWN;
2804 struct pwb_context *ctx = NULL;
2806 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2811 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
2814 /* Get the username */
2815 ret = pam_get_user(pamh, &username, NULL);
2816 if ((ret != PAM_SUCCESS) || (!username)) {
2817 _pam_log_debug(ctx, LOG_DEBUG,
2818 "can not get the username");
2819 ret = PAM_SERVICE_ERR;
2823 /* Verify the username */
2824 ret = valid_user(ctx, username);
2827 /* some sort of system error. The log was already printed */
2828 ret = PAM_SERVICE_ERR;
2831 /* the user does not exist */
2832 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
2834 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
2838 ret = PAM_USER_UNKNOWN;
2841 pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2842 (const void **)&tmp);
2844 ret = atoi((const char *)tmp);
2846 case PAM_AUTHTOK_EXPIRED:
2847 /* fall through, since new token is required in this case */
2848 case PAM_NEW_AUTHTOK_REQD:
2849 _pam_log(ctx, LOG_WARNING,
2850 "pam_sm_acct_mgmt success but %s is set",
2851 PAM_WINBIND_NEW_AUTHTOK_REQD);
2852 _pam_log(ctx, LOG_NOTICE,
2853 "user '%s' needs new password",
2855 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2856 ret = PAM_NEW_AUTHTOK_REQD;
2859 _pam_log(ctx, LOG_WARNING,
2860 "pam_sm_acct_mgmt success");
2861 _pam_log(ctx, LOG_NOTICE,
2862 "user '%s' granted access", username);
2868 /* Otherwise, the authentication looked good */
2869 _pam_log(ctx, LOG_NOTICE,
2870 "user '%s' granted access", username);
2874 /* we don't know anything about this return value */
2875 _pam_log(ctx, LOG_ERR,
2876 "internal module error (ret = %d, user = '%s')",
2878 ret = PAM_SERVICE_ERR;
2882 /* should not be reached */
2887 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
2895 int pam_sm_open_session(pam_handle_t *pamh, int flags,
2896 int argc, const char **argv)
2898 int ret = PAM_SUCCESS;
2899 struct pwb_context *ctx = NULL;
2901 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2906 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
2908 if (ctx->ctrl & WINBIND_MKHOMEDIR) {
2909 /* check and create homedir */
2910 ret = _pam_mkhomedir(ctx);
2913 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
2921 int pam_sm_close_session(pam_handle_t *pamh, int flags,
2922 int argc, const char **argv)
2924 int ret = PAM_SUCCESS;
2925 struct pwb_context *ctx = NULL;
2927 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2932 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
2935 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
2943 * evaluate whether we need to re-authenticate with kerberos after a
2946 * @param ctx PAM winbind context.
2947 * @param user The username
2949 * @return boolean Returns true if required, false if not.
2952 static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
2956 /* Make sure that we only do this if a) the chauthtok got initiated
2957 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2958 * later password change via the "passwd" command if done by the user
2960 * NB. If we login from gdm or xdm and the password expires,
2961 * we change the password, but there is no memory cache.
2962 * Thus, even for passthrough login, we should do the
2963 * authentication again to update memory cache.
2967 char *new_authtok_reqd_during_auth = NULL;
2968 struct passwd *pwd = NULL;
2970 _pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2971 &new_authtok_reqd_during_auth);
2972 pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2975 if (new_authtok_reqd_during_auth) {
2979 pwd = getpwnam(user);
2984 if (getuid() == pwd->pw_uid) {
2993 int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
2994 int argc, const char **argv)
2998 bool cached_login = false;
3000 /* <DO NOT free() THESE> */
3002 char *pass_old, *pass_new;
3003 /* </DO NOT free() THESE> */
3008 char *username_ret = NULL;
3009 struct wbcAuthErrorInfo *error = NULL;
3010 struct pwb_context *ctx = NULL;
3012 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
3017 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
3019 cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
3021 /* clearing offline bit for auth */
3022 ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
3025 * First get the name of a user
3027 ret = pam_get_user(pamh, &user, _("Username: "));
3029 _pam_log(ctx, LOG_ERR,
3030 "password - could not identify user");
3035 _pam_log(ctx, LOG_ERR, "username was NULL!");
3036 ret = PAM_USER_UNKNOWN;
3040 _pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
3042 /* check if this is really a user in winbindd, not only in NSS */
3043 ret = valid_user(ctx, user);
3046 ret = PAM_USER_UNKNOWN;
3049 ret = PAM_SYSTEM_ERR;
3056 * obtain and verify the current password (OLDAUTHTOK) for
3060 if (flags & PAM_PRELIM_CHECK) {
3061 time_t pwdlastset_prelim = 0;
3063 /* instruct user what is happening */
3065 #define greeting _("Changing password for")
3066 Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
3068 _pam_log(ctx, LOG_CRIT,
3069 "password - out of memory");
3075 lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
3076 ret = _winbind_read_password(ctx, lctrl,
3078 _("(current) NT password: "),
3080 (const char **) &pass_old);
3081 TALLOC_FREE(Announce);
3082 if (ret != PAM_SUCCESS) {
3083 _pam_log(ctx, LOG_NOTICE,
3084 "password - (old) token not obtained");
3088 /* verify that this is the password for this user */
3090 ret = winbind_auth_request(ctx, user, pass_old,
3093 &pwdlastset_prelim, NULL);
3095 if (ret != PAM_ACCT_EXPIRED &&
3096 ret != PAM_AUTHTOK_EXPIRED &&
3097 ret != PAM_NEW_AUTHTOK_REQD &&
3098 ret != PAM_SUCCESS) {
3103 pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3104 (void *)pwdlastset_prelim, NULL);
3106 ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
3107 (const void *) pass_old);
3109 if (ret != PAM_SUCCESS) {
3110 _pam_log(ctx, LOG_CRIT,
3111 "failed to set PAM_OLDAUTHTOK");
3113 } else if (flags & PAM_UPDATE_AUTHTOK) {
3115 time_t pwdlastset_update = 0;
3118 * obtain the proposed password
3122 * get the old token back.
3125 ret = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
3127 if (ret != PAM_SUCCESS) {
3128 _pam_log(ctx, LOG_NOTICE,
3129 "user not authenticated");
3133 lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
3135 if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
3136 lctrl |= WINBIND_USE_FIRST_PASS_ARG;
3139 ret = PAM_AUTHTOK_ERR;
3140 while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
3142 * use_authtok is to force the use of a previously entered
3143 * password -- needed for pluggable password strength checking
3146 ret = _winbind_read_password(ctx, lctrl,
3148 _("Enter new NT password: "),
3149 _("Retype new NT password: "),
3150 (const char **)&pass_new);
3152 if (ret != PAM_SUCCESS) {
3153 _pam_log_debug(ctx, LOG_ALERT,
3155 "new password not obtained");
3156 pass_old = NULL;/* tidy up */
3161 * At this point we know who the user is and what they
3162 * propose as their new password. Verify that the new
3163 * password is acceptable.
3166 if (pass_new[0] == '\0') {/* "\0" password = NULL */
3172 * By reaching here we have approved the passwords and must now
3173 * rebuild the password database file.
3175 _pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3176 &pwdlastset_update);
3179 * if cached creds were enabled, make sure to set the
3180 * WINBIND_CACHED_LOGIN bit here in order to have winbindd
3181 * update the cached creds storage - gd
3184 ctx->ctrl |= WINBIND_CACHED_LOGIN;
3187 ret = winbind_chauthtok_request(ctx, user, pass_old,
3188 pass_new, pwdlastset_update);
3190 pass_old = pass_new = NULL;
3194 if (_pam_require_krb5_auth_after_chauthtok(ctx, user)) {
3196 const char *member = NULL;
3197 const char *cctype = NULL;
3198 int warn_pwd_expire;
3199 struct wbcLogonUserInfo *info = NULL;
3200 struct wbcUserPasswordPolicyInfo *policy = NULL;
3202 member = get_member_from_config(ctx);
3203 cctype = get_krb5_cc_type_from_config(ctx);
3204 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
3206 /* Keep WINBIND_CACHED_LOGIN bit for
3207 * authentication after changing the password.
3208 * This will update the cached credentials in case
3209 * that winbindd_dual_pam_chauthtok() fails
3214 ret = winbind_auth_request(ctx, user, pass_new,
3216 &error, &info, &policy,
3217 NULL, &username_ret);
3218 pass_old = pass_new = NULL;
3220 if (ret == PAM_SUCCESS) {
3222 struct wbcAuthUserInfo *user_info = NULL;
3224 if (info && info->info) {
3225 user_info = info->info;
3228 /* warn a user if the password is about to
3230 _pam_warn_password_expiry(ctx, user_info, policy,
3234 /* set some info3 info for other modules in the
3236 _pam_set_data_info3(ctx, user_info);
3238 /* put krb5ccname into env */
3239 _pam_setup_krb5_env(ctx, info);
3242 pam_set_item(pamh, PAM_USER,
3244 _pam_log_debug(ctx, LOG_INFO,
3245 "Returned user was '%s'",
3252 if (info && info->blobs) {
3253 wbcFreeMemory(info->blobs);
3255 wbcFreeMemory(info);
3256 wbcFreeMemory(policy);
3261 ret = PAM_SERVICE_ERR;
3266 /* Deal with offline errors. */
3268 const char *codes[] = {
3269 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3270 "NT_STATUS_NO_LOGON_SERVERS",
3271 "NT_STATUS_ACCESS_DENIED"
3274 for (i=0; i<ARRAY_SIZE(codes); i++) {
3276 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
3282 wbcFreeMemory(error);
3284 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
3293 /* static module data */
3295 struct pam_module _pam_winbind_modstruct = {
3297 pam_sm_authenticate,
3300 pam_sm_open_session,
3301 pam_sm_close_session,
3308 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3309 * Copyright (c) Tim Potter <tpot@samba.org> 2000
3310 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3311 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3312 * Copyright (c) Jan Rêkorajski 1999.
3313 * Copyright (c) Andrew G. Morgan 1996-8.
3314 * Copyright (c) Alex O. Yuriev, 1996.
3315 * Copyright (c) Cristian Gafton 1996.
3316 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3318 * Redistribution and use in source and binary forms, with or without
3319 * modification, are permitted provided that the following conditions
3321 * 1. Redistributions of source code must retain the above copyright
3322 * notice, and the entire permission notice in its entirety,
3323 * including the disclaimer of warranties.
3324 * 2. Redistributions in binary form must reproduce the above copyright
3325 * notice, this list of conditions and the following disclaimer in the
3326 * documentation and/or other materials provided with the distribution.
3327 * 3. The name of the author may not be used to endorse or promote
3328 * products derived from this software without specific prior
3329 * written permission.
3331 * ALTERNATIVELY, this product may be distributed under the terms of
3332 * the GNU Public License, in which case the provisions of the GPL are
3333 * required INSTEAD OF the above restrictions. (This clause is
3334 * necessary due to a potential bad interaction between the GPL and
3335 * the restrictions contained in a BSD-style copyright.)
3337 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3338 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3339 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3340 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3341 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3342 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3343 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3344 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3345 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3346 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3347 * OF THE POSSIBILITY OF SUCH DAMAGE.