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 #define UID_WRAPPER_NOT_REPLACE
15 #include "pam_winbind.h"
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);
167 /* some syslogging */
169 #ifdef HAVE_PAM_VSYSLOG
170 static void _pam_log_int(const pam_handle_t *pamh,
175 pam_vsyslog(pamh, err, format, args);
178 static void _pam_log_int(const pam_handle_t *pamh,
183 char *format2 = NULL;
186 pam_get_item(pamh, PAM_SERVICE, (const void **) &service);
188 format2 = (char *)malloc(strlen(MODULE_NAME)+strlen(format)+strlen(service)+5);
189 if (format2 == NULL) {
190 /* what else todo ? */
191 vsyslog(err, format, args);
195 sprintf(format2, "%s(%s): %s", MODULE_NAME, service, format);
196 vsyslog(err, format2, args);
199 #endif /* HAVE_PAM_VSYSLOG */
201 static bool _pam_log_is_silent(int ctrl)
203 return on(ctrl, WINBIND_SILENT);
206 static void _pam_log(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
207 static void _pam_log(struct pwb_context *r, int err, const char *format, ...)
211 if (_pam_log_is_silent(r->ctrl)) {
215 va_start(args, format);
216 _pam_log_int(r->pamh, err, format, args);
219 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
220 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
224 if (_pam_log_is_silent(ctrl)) {
228 va_start(args, format);
229 _pam_log_int(pamh, err, format, args);
233 static bool _pam_log_is_debug_enabled(int ctrl)
239 if (_pam_log_is_silent(ctrl)) {
243 if (!(ctrl & WINBIND_DEBUG_ARG)) {
250 static bool _pam_log_is_debug_state_enabled(int ctrl)
252 if (!(ctrl & WINBIND_DEBUG_STATE)) {
256 return _pam_log_is_debug_enabled(ctrl);
259 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
260 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...)
264 if (!_pam_log_is_debug_enabled(r->ctrl)) {
268 va_start(args, format);
269 _pam_log_int(r->pamh, err, format, args);
272 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
273 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
277 if (!_pam_log_is_debug_enabled(ctrl)) {
281 va_start(args, format);
282 _pam_log_int(pamh, err, format, args);
286 static void _pam_log_state_datum(struct pwb_context *ctx,
291 const void *data = NULL;
292 if (item_type != 0) {
293 pam_get_item(ctx->pamh, item_type, &data);
295 pam_get_data(ctx->pamh, key, &data);
298 const char *type = (item_type != 0) ? "ITEM" : "DATA";
299 if (is_string != 0) {
300 _pam_log_debug(ctx, LOG_DEBUG,
301 "[pamh: %p] STATE: %s(%s) = \"%s\" (%p)",
302 ctx->pamh, type, key, (const char *)data,
305 _pam_log_debug(ctx, LOG_DEBUG,
306 "[pamh: %p] STATE: %s(%s) = %p",
307 ctx->pamh, type, key, data);
312 #define _PAM_LOG_STATE_DATA_POINTER(ctx, module_data_name) \
313 _pam_log_state_datum(ctx, 0, module_data_name, 0)
315 #define _PAM_LOG_STATE_DATA_STRING(ctx, module_data_name) \
316 _pam_log_state_datum(ctx, 0, module_data_name, 1)
318 #define _PAM_LOG_STATE_ITEM_POINTER(ctx, item_type) \
319 _pam_log_state_datum(ctx, item_type, #item_type, 0)
321 #define _PAM_LOG_STATE_ITEM_STRING(ctx, item_type) \
322 _pam_log_state_datum(ctx, item_type, #item_type, 1)
324 #ifdef DEBUG_PASSWORD
325 #define _LOG_PASSWORD_AS_STRING 1
327 #define _LOG_PASSWORD_AS_STRING 0
330 #define _PAM_LOG_STATE_ITEM_PASSWORD(ctx, item_type) \
331 _pam_log_state_datum(ctx, item_type, #item_type, \
332 _LOG_PASSWORD_AS_STRING)
334 * wrapper to preserve old behaviour of iniparser which ignored
335 * key values that had no value assigned like
337 * for a key like above newer iniparser will return a zero-length
338 * string, previously iniparser would return NULL
340 static char *iniparser_getstring_nonempty(dictionary *d, char *key, char *def)
342 char *ret = iniparser_getstring(d, key, def);
343 if (ret && strlen(ret) == 0) {
349 static void _pam_log_state(struct pwb_context *ctx)
351 if (!_pam_log_is_debug_state_enabled(ctx->ctrl)) {
355 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_SERVICE);
356 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER);
357 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_TTY);
358 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RHOST);
359 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RUSER);
360 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_OLDAUTHTOK);
361 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_AUTHTOK);
362 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER_PROMPT);
363 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_CONV);
364 #ifdef PAM_FAIL_DELAY
365 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_FAIL_DELAY);
367 #ifdef PAM_REPOSITORY
368 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_REPOSITORY);
371 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_HOMEDIR);
372 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSCRIPT);
373 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSERVER);
374 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_PROFILEPATH);
375 _PAM_LOG_STATE_DATA_STRING(ctx,
376 PAM_WINBIND_NEW_AUTHTOK_REQD);
377 /* Use atoi to get PAM result code */
378 _PAM_LOG_STATE_DATA_STRING(ctx,
379 PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
380 _PAM_LOG_STATE_DATA_POINTER(ctx, PAM_WINBIND_PWD_LAST_SET);
383 static int _pam_parse(const pam_handle_t *pamh,
387 dictionary **result_d)
390 const char *config_file = NULL;
393 dictionary *d = NULL;
395 if (flags & PAM_SILENT) {
396 ctrl |= WINBIND_SILENT;
399 for (i=argc,v=argv; i-- > 0; ++v) {
400 if (!strncasecmp(*v, "config", strlen("config"))) {
401 ctrl |= WINBIND_CONFIG_FILE;
407 if (config_file == NULL) {
408 config_file = PAM_WINBIND_CONFIG_FILE;
411 d = iniparser_load(discard_const_p(char, config_file));
413 goto config_from_pam;
416 if (iniparser_getboolean(d, discard_const_p(char, "global:debug"), false)) {
417 ctrl |= WINBIND_DEBUG_ARG;
420 if (iniparser_getboolean(d, discard_const_p(char, "global:debug_state"), false)) {
421 ctrl |= WINBIND_DEBUG_STATE;
424 if (iniparser_getboolean(d, discard_const_p(char, "global:cached_login"), false)) {
425 ctrl |= WINBIND_CACHED_LOGIN;
428 if (iniparser_getboolean(d, discard_const_p(char, "global:krb5_auth"), false)) {
429 ctrl |= WINBIND_KRB5_AUTH;
432 if (iniparser_getboolean(d, discard_const_p(char, "global:silent"), false)) {
433 ctrl |= WINBIND_SILENT;
436 if (iniparser_getstring_nonempty(d, discard_const_p(char, "global:krb5_ccache_type"), NULL) != NULL) {
437 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
440 if ((iniparser_getstring_nonempty(d, discard_const_p(char, "global:require-membership-of"), NULL)
442 (iniparser_getstring_nonempty(d, discard_const_p(char, "global:require_membership_of"), NULL)
444 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
447 if (iniparser_getboolean(d, discard_const_p(char, "global:try_first_pass"), false)) {
448 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
451 if (iniparser_getint(d, discard_const_p(char, "global:warn_pwd_expire"), 0)) {
452 ctrl |= WINBIND_WARN_PWD_EXPIRE;
455 if (iniparser_getboolean(d, discard_const_p(char, "global:mkhomedir"), false)) {
456 ctrl |= WINBIND_MKHOMEDIR;
460 /* step through arguments */
461 for (i=argc,v=argv; i-- > 0; ++v) {
463 /* generic options */
464 if (!strcmp(*v,"debug"))
465 ctrl |= WINBIND_DEBUG_ARG;
466 else if (!strcasecmp(*v, "debug_state"))
467 ctrl |= WINBIND_DEBUG_STATE;
468 else if (!strcasecmp(*v, "silent"))
469 ctrl |= WINBIND_SILENT;
470 else if (!strcasecmp(*v, "use_authtok"))
471 ctrl |= WINBIND_USE_AUTHTOK_ARG;
472 else if (!strcasecmp(*v, "use_first_pass"))
473 ctrl |= WINBIND_USE_FIRST_PASS_ARG;
474 else if (!strcasecmp(*v, "try_first_pass"))
475 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
476 else if (!strcasecmp(*v, "unknown_ok"))
477 ctrl |= WINBIND_UNKNOWN_OK_ARG;
478 else if (!strncasecmp(*v, "require_membership_of",
479 strlen("require_membership_of")))
480 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
481 else if (!strncasecmp(*v, "require-membership-of",
482 strlen("require-membership-of")))
483 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
484 else if (!strcasecmp(*v, "krb5_auth"))
485 ctrl |= WINBIND_KRB5_AUTH;
486 else if (!strncasecmp(*v, "krb5_ccache_type",
487 strlen("krb5_ccache_type")))
488 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
489 else if (!strcasecmp(*v, "cached_login"))
490 ctrl |= WINBIND_CACHED_LOGIN;
491 else if (!strcasecmp(*v, "mkhomedir"))
492 ctrl |= WINBIND_MKHOMEDIR;
494 __pam_log(pamh, ctrl, LOG_ERR,
495 "pam_parse: unknown option: %s", *v);
505 iniparser_freedict(d);
512 static int _pam_winbind_free_context(struct pwb_context *ctx)
519 iniparser_freedict(ctx->dict);
525 static int _pam_winbind_init_context(pam_handle_t *pamh,
529 struct pwb_context **ctx_p)
531 struct pwb_context *r = NULL;
537 r = talloc_zero(NULL, struct pwb_context);
542 talloc_set_destructor(r, _pam_winbind_free_context);
548 r->ctrl = _pam_parse(pamh, flags, argc, argv, &r->dict);
551 return PAM_SYSTEM_ERR;
559 static void _pam_winbind_cleanup_func(pam_handle_t *pamh,
563 int ctrl = _pam_parse(pamh, 0, 0, NULL, NULL);
564 if (_pam_log_is_debug_state_enabled(ctrl)) {
565 __pam_log_debug(pamh, ctrl, LOG_DEBUG,
566 "[pamh: %p] CLEAN: cleaning up PAM data %p "
567 "(error_status = %d)", pamh, data,
574 static const struct ntstatus_errors {
575 const char *ntstatus_string;
576 const char *error_string;
577 } ntstatus_errors[] = {
580 {"NT_STATUS_BACKUP_CONTROLLER",
581 N_("No primary Domain Controler available")},
582 {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
583 N_("No domain controllers found")},
584 {"NT_STATUS_NO_LOGON_SERVERS",
585 N_("No logon servers")},
586 {"NT_STATUS_PWD_TOO_SHORT",
587 N_("Password too short")},
588 {"NT_STATUS_PWD_TOO_RECENT",
589 N_("The password of this user is too recent to change")},
590 {"NT_STATUS_PWD_HISTORY_CONFLICT",
591 N_("Password is already in password history")},
592 {"NT_STATUS_PASSWORD_EXPIRED",
593 N_("Your password has expired")},
594 {"NT_STATUS_PASSWORD_MUST_CHANGE",
595 N_("You need to change your password now")},
596 {"NT_STATUS_INVALID_WORKSTATION",
597 N_("You are not allowed to logon from this workstation")},
598 {"NT_STATUS_INVALID_LOGON_HOURS",
599 N_("You are not allowed to logon at this time")},
600 {"NT_STATUS_ACCOUNT_EXPIRED",
601 N_("Your account has expired. "
602 "Please contact your System administrator")}, /* SCNR */
603 {"NT_STATUS_ACCOUNT_DISABLED",
604 N_("Your account is disabled. "
605 "Please contact your System administrator")}, /* SCNR */
606 {"NT_STATUS_ACCOUNT_LOCKED_OUT",
607 N_("Your account has been locked. "
608 "Please contact your System administrator")}, /* SCNR */
609 {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
610 N_("Invalid Trust Account")},
611 {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
612 N_("Invalid Trust Account")},
613 {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
614 N_("Invalid Trust Account")},
615 {"NT_STATUS_ACCESS_DENIED",
616 N_("Access is denied")},
620 static const char *_get_ntstatus_error_string(const char *nt_status_string)
623 for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
624 if (!strcasecmp(ntstatus_errors[i].ntstatus_string,
626 return _(ntstatus_errors[i].error_string);
632 /* --- authentication management functions --- */
634 /* Attempt a conversation */
636 static int converse(const pam_handle_t *pamh,
638 struct pam_message **message,
639 struct pam_response **response)
642 struct pam_conv *conv;
644 retval = pam_get_item(pamh, PAM_CONV, (const void **) &conv);
645 if (retval == PAM_SUCCESS) {
646 retval = conv->conv(nargs,
647 (const struct pam_message **)message,
648 response, conv->appdata_ptr);
651 return retval; /* propagate error status */
655 static int _make_remark(struct pwb_context *ctx,
659 int retval = PAM_SUCCESS;
661 struct pam_message *pmsg[1], msg[1];
662 struct pam_response *resp;
664 if (ctx->flags & WINBIND_SILENT) {
669 msg[0].msg = discard_const_p(char, text);
670 msg[0].msg_style = type;
673 retval = converse(ctx->pamh, 1, pmsg, &resp);
676 _pam_drop_reply(resp, 1);
681 static int _make_remark_v(struct pwb_context *ctx,
689 ret = vasprintf(&var, format, args);
691 _pam_log(ctx, LOG_ERR, "memory allocation failure");
695 ret = _make_remark(ctx, type, var);
700 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
701 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...)
706 va_start(args, format);
707 ret = _make_remark_v(ctx, type, format, args);
712 static int pam_winbind_request_log(struct pwb_context *ctx,
719 /* incorrect password */
720 _pam_log(ctx, LOG_WARNING, "user '%s' denied access "
721 "(incorrect password or invalid membership)", user);
723 case PAM_ACCT_EXPIRED:
724 /* account expired */
725 _pam_log(ctx, LOG_WARNING, "user '%s' account expired",
728 case PAM_AUTHTOK_EXPIRED:
729 /* password expired */
730 _pam_log(ctx, LOG_WARNING, "user '%s' password expired",
733 case PAM_NEW_AUTHTOK_REQD:
734 /* new password required */
735 _pam_log(ctx, LOG_WARNING, "user '%s' new password "
738 case PAM_USER_UNKNOWN:
739 /* the user does not exist */
740 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
742 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
747 /* Otherwise, the authentication looked good */
748 if (strcmp(fn, "wbcLogonUser") == 0) {
749 _pam_log(ctx, LOG_NOTICE,
750 "user '%s' granted access", user);
752 _pam_log(ctx, LOG_NOTICE,
753 "user '%s' OK", user);
757 /* we don't know anything about this return value */
758 _pam_log(ctx, LOG_ERR,
759 "internal module error (retval = %s(%d), user = '%s')",
760 _pam_error_code_str(retval), retval, user);
765 static int wbc_auth_error_to_pam_error(struct pwb_context *ctx,
766 struct wbcAuthErrorInfo *e,
768 const char *username,
771 int ret = PAM_AUTH_ERR;
773 if (WBC_ERROR_IS_OK(status)) {
774 _pam_log_debug(ctx, LOG_DEBUG, "request %s succeeded",
777 return pam_winbind_request_log(ctx, ret, username, fn);
781 if (e->pam_error != PAM_SUCCESS) {
782 _pam_log(ctx, LOG_ERR,
783 "request %s failed: %s, "
784 "PAM error: %s (%d), NTSTATUS: %s, "
785 "Error message was: %s",
787 wbcErrorString(status),
788 _pam_error_code_str(e->pam_error),
793 return pam_winbind_request_log(ctx, ret, username, fn);
796 _pam_log(ctx, LOG_ERR, "request %s failed, but PAM error 0!", fn);
798 ret = PAM_SERVICE_ERR;
799 return pam_winbind_request_log(ctx, ret, username, fn);
802 ret = wbc_error_to_pam_error(status);
803 return pam_winbind_request_log(ctx, ret, username, fn);
806 #if defined(HAVE_PAM_RADIO_TYPE)
807 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
809 struct pam_message msg, *pmsg;
810 struct pam_response *resp = NULL;
814 msg.msg_style = PAM_RADIO_TYPE;
815 msg.msg = _("Do you want to change your password now?");
816 ret = converse(ctx->pamh, 1, &pmsg, &resp);
818 if (ret == PAM_SUCCESS) {
819 _pam_log(ctx, LOG_CRIT, "pam_winbind: system error!\n");
823 if (ret != PAM_SUCCESS) {
826 _pam_log(ctx, LOG_CRIT, "Received [%s] reply from application.\n", resp->resp);
828 if ((resp->resp != NULL) && (strcasecmp(resp->resp, "yes") == 0)) {
832 _pam_drop_reply(resp, 1);
836 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
843 * send a password expiry message if required
845 * @param ctx PAM winbind context.
846 * @param next_change expected (calculated) next expiry date.
847 * @param already_expired pointer to a boolean to indicate if the password is
850 * @return boolean Returns true if message has been sent, false if not.
853 static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
857 bool *already_expired,
861 struct tm tm_now, tm_next_change;
865 if (already_expired) {
866 *already_expired = false;
873 if (next_change <= now) {
874 PAM_WB_REMARK_DIRECT(ctx, "NT_STATUS_PASSWORD_EXPIRED");
875 if (already_expired) {
876 *already_expired = true;
881 if ((next_change < 0) ||
882 (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
886 if ((localtime_r(&now, &tm_now) == NULL) ||
887 (localtime_r(&next_change, &tm_next_change) == NULL)) {
891 days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) -
892 (tm_now.tm_yday+tm_now.tm_year*365);
895 ret = _make_remark(ctx, PAM_TEXT_INFO,
896 _("Your password expires today.\n"));
899 * If change_pwd and already_expired is null.
900 * We are just sending a notification message.
901 * We don't expect any response in this case.
904 if (!change_pwd && !already_expired) {
909 * successfully sent the warning message.
910 * Give the user a chance to change pwd.
912 if (ret == PAM_SUCCESS) {
914 retval = _pam_winbind_change_pwd(ctx);
923 if (days > 0 && days < warn_pwd_expire) {
925 ret = _make_remark_format(ctx, PAM_TEXT_INFO,
926 _("Your password will expire in %d %s.\n"),
927 days, (days > 1) ? _("days"):_("day"));
929 * If change_pwd and already_expired is null.
930 * We are just sending a notification message.
931 * We don't expect any response in this case.
934 if (!change_pwd && !already_expired) {
939 * successfully sent the warning message.
940 * Give the user a chance to change pwd.
942 if (ret == PAM_SUCCESS) {
944 retval = _pam_winbind_change_pwd(ctx);
957 * Send a warning if the password expires in the near future
959 * @param ctx PAM winbind context.
960 * @param response The full authentication response structure.
961 * @param already_expired boolean, is the pwd already expired?
966 static void _pam_warn_password_expiry(struct pwb_context *ctx,
967 const struct wbcAuthUserInfo *info,
968 const struct wbcUserPasswordPolicyInfo *policy,
970 bool *already_expired,
973 time_t now = time(NULL);
974 time_t next_change = 0;
976 if (!info || !policy) {
980 if (already_expired) {
981 *already_expired = false;
988 /* accounts with WBC_ACB_PWNOEXP set never receive a warning */
989 if (info->acct_flags & WBC_ACB_PWNOEXP) {
993 /* no point in sending a warning if this is a grace logon */
994 if (PAM_WB_GRACE_LOGON(info->user_flags)) {
998 /* check if the info3 must change timestamp has been set */
999 next_change = info->pass_must_change_time;
1001 if (_pam_send_password_expiry_message(ctx, next_change, now,
1008 /* now check for the global password policy */
1009 /* good catch from Ralf Haferkamp: an expiry of "never" is translated
1011 if ((policy->expire == (int64_t)-1) ||
1012 (policy->expire == 0)) {
1016 next_change = info->pass_last_set_time + policy->expire;
1018 if (_pam_send_password_expiry_message(ctx, next_change, now,
1025 /* no warning sent */
1028 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
1031 * Append a string, making sure not to overflow and to always return a
1032 * NULL-terminated string.
1034 * @param dest Destination string buffer (must already be NULL-terminated).
1035 * @param src Source string buffer.
1036 * @param dest_buffer_size Size of dest buffer in bytes.
1038 * @return false if dest buffer is not big enough (no bytes copied), true on
1042 static bool safe_append_string(char *dest,
1044 int dest_buffer_size)
1046 int dest_length = strlen(dest);
1047 int src_length = strlen(src);
1049 if (dest_length + src_length + 1 > dest_buffer_size) {
1053 memcpy(dest + dest_length, src, src_length + 1);
1058 * Convert a names into a SID string, appending it to a buffer.
1060 * @param ctx PAM winbind context.
1061 * @param user User in PAM request.
1062 * @param name Name to convert.
1063 * @param sid_list_buffer Where to append the string sid.
1064 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1066 * @return false on failure, true on success.
1068 static bool winbind_name_to_sid_string(struct pwb_context *ctx,
1071 char *sid_list_buffer,
1072 int sid_list_buffer_size)
1074 char sid_string[WBC_SID_STRING_BUFLEN];
1077 if (IS_SID_STRING(name)) {
1078 strlcpy(sid_string, name, sizeof(sid_string));
1081 struct wbcDomainSid sid;
1082 enum wbcSidType type;
1084 _pam_log_debug(ctx, LOG_DEBUG,
1085 "no sid given, looking up: %s\n", name);
1087 wbc_status = wbcLookupName("", name, &sid, &type);
1088 if (!WBC_ERROR_IS_OK(wbc_status)) {
1089 _pam_log(ctx, LOG_INFO,
1090 "could not lookup name: %s\n", name);
1094 wbcSidToStringBuf(&sid, sid_string, sizeof(sid_string));
1097 if (!safe_append_string(sid_list_buffer, sid_string,
1098 sid_list_buffer_size)) {
1105 * Convert a list of names into a list of sids.
1107 * @param ctx PAM winbind context.
1108 * @param user User in PAM request.
1109 * @param name_list List of names or string sids, separated by commas.
1110 * @param sid_list_buffer Where to put the list of string sids.
1111 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1113 * @return false on failure, true on success.
1115 static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
1117 const char *name_list,
1118 char *sid_list_buffer,
1119 int sid_list_buffer_size)
1121 bool result = false;
1122 char *current_name = NULL;
1123 const char *search_location;
1127 if (sid_list_buffer_size > 0) {
1128 sid_list_buffer[0] = 0;
1131 search_location = name_list;
1132 while ((comma = strchr(search_location, ',')) != NULL) {
1133 current_name = strndup(search_location,
1134 comma - search_location);
1135 if (NULL == current_name) {
1139 if (!winbind_name_to_sid_string(ctx, user,
1142 sid_list_buffer_size)) {
1144 * If one group name failed, we must not fail
1145 * the authentication totally, continue with
1146 * the following group names. If user belongs to
1147 * one of the valid groups, we must allow it
1151 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1152 "check if group %s is valid group.", current_name,
1154 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1155 "to sid, please contact your administrator to see "
1156 "if group %s is valid."), current_name, current_name);
1157 SAFE_FREE(current_name);
1158 search_location = comma + 1;
1162 SAFE_FREE(current_name);
1164 if (!safe_append_string(sid_list_buffer, ",",
1165 sid_list_buffer_size)) {
1169 search_location = comma + 1;
1172 if (!winbind_name_to_sid_string(ctx, user, search_location,
1174 sid_list_buffer_size)) {
1175 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1176 "check if group %s is valid group.", search_location,
1178 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1179 "to sid, please contact your administrator to see "
1180 "if group %s is valid."), search_location, search_location);
1182 * The lookup of the last name failed..
1183 * It results in require_member_of_sid ends with ','
1184 * It is malformated parameter here, overwrite the last ','.
1186 len = strlen(sid_list_buffer);
1187 if ((len != 0) && (sid_list_buffer[len - 1] == ',')) {
1188 sid_list_buffer[len - 1] = '\0';
1195 SAFE_FREE(current_name);
1200 * put krb5ccname variable into environment
1202 * @param ctx PAM winbind context.
1203 * @param krb5ccname env variable retrieved from winbindd.
1208 static void _pam_setup_krb5_env(struct pwb_context *ctx,
1209 struct wbcLogonUserInfo *info)
1214 const char *krb5ccname = NULL;
1216 if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
1224 for (i=0; i < info->num_blobs; i++) {
1225 if (strcasecmp(info->blobs[i].name, "krb5ccname") == 0) {
1226 krb5ccname = (const char *)info->blobs[i].blob.data;
1231 if (!krb5ccname || (strlen(krb5ccname) == 0)) {
1235 _pam_log_debug(ctx, LOG_DEBUG,
1236 "request returned KRB5CCNAME: %s", krb5ccname);
1238 if (asprintf(&var, "KRB5CCNAME=%s", krb5ccname) == -1) {
1242 ret = pam_putenv(ctx->pamh, var);
1244 _pam_log(ctx, LOG_ERR,
1245 "failed to set KRB5CCNAME to %s: %s",
1246 var, pam_strerror(ctx->pamh, ret));
1252 * Copy unix username if available (further processed in PAM).
1254 * @param ctx PAM winbind context
1255 * @param user_ret A pointer that holds a pointer to a string
1256 * @param unix_username A username
1261 static void _pam_setup_unix_username(struct pwb_context *ctx,
1263 struct wbcLogonUserInfo *info)
1265 const char *unix_username = NULL;
1268 if (!user_ret || !info) {
1272 for (i=0; i < info->num_blobs; i++) {
1273 if (strcasecmp(info->blobs[i].name, "unix_username") == 0) {
1274 unix_username = (const char *)info->blobs[i].blob.data;
1279 if (!unix_username || !unix_username[0]) {
1283 *user_ret = strdup(unix_username);
1287 * Set string into the PAM stack.
1289 * @param ctx PAM winbind context.
1290 * @param data_name Key name for pam_set_data.
1291 * @param value String value.
1296 static void _pam_set_data_string(struct pwb_context *ctx,
1297 const char *data_name,
1302 if (!data_name || !value || (strlen(data_name) == 0) ||
1303 (strlen(value) == 0)) {
1307 ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
1308 _pam_winbind_cleanup_func);
1310 _pam_log_debug(ctx, LOG_DEBUG,
1311 "Could not set data %s: %s\n",
1312 data_name, pam_strerror(ctx->pamh, ret));
1317 * Set info3 strings into the PAM stack.
1319 * @param ctx PAM winbind context.
1320 * @param data_name Key name for pam_set_data.
1321 * @param value String value.
1326 static void _pam_set_data_info3(struct pwb_context *ctx,
1327 const struct wbcAuthUserInfo *info)
1329 _pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
1330 info->home_directory);
1331 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
1332 info->logon_script);
1333 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
1334 info->logon_server);
1335 _pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
1336 info->profile_path);
1340 * Free info3 strings in the PAM stack.
1342 * @param pamh PAM handle
1347 static void _pam_free_data_info3(pam_handle_t *pamh)
1349 pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1350 pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1351 pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1352 pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1356 * Send PAM_ERROR_MSG for cached or grace logons.
1358 * @param ctx PAM winbind context.
1359 * @param username User in PAM request.
1360 * @param info3_user_flgs Info3 flags containing logon type bits.
1365 static void _pam_warn_logon_type(struct pwb_context *ctx,
1366 const char *username,
1367 uint32_t info3_user_flgs)
1369 /* inform about logon type */
1370 if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1372 _make_remark(ctx, PAM_ERROR_MSG,
1374 "Please change your password as soon you're "
1376 _pam_log_debug(ctx, LOG_DEBUG,
1377 "User %s logged on using grace logon\n",
1380 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1382 _make_remark(ctx, PAM_ERROR_MSG,
1383 _("Domain Controller unreachable, "
1384 "using cached credentials instead. "
1385 "Network resources may be unavailable"));
1386 _pam_log_debug(ctx, LOG_DEBUG,
1387 "User %s logged on using cached credentials\n",
1393 * Send PAM_ERROR_MSG for krb5 errors.
1395 * @param ctx PAM winbind context.
1396 * @param username User in PAM request.
1397 * @param info3_user_flgs Info3 flags containing logon type bits.
1402 static void _pam_warn_krb5_failure(struct pwb_context *ctx,
1403 const char *username,
1404 uint32_t info3_user_flgs)
1406 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1407 _make_remark(ctx, PAM_ERROR_MSG,
1408 _("Failed to establish your Kerberos Ticket cache "
1409 "due time differences\n"
1410 "with the domain controller. "
1411 "Please verify the system time.\n"));
1412 _pam_log_debug(ctx, LOG_DEBUG,
1413 "User %s: Clock skew when getting Krb5 TGT\n",
1418 static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
1419 const struct wbcAuthErrorInfo *e,
1420 const char *nt_status_string,
1423 const char *ntstatus = NULL;
1424 const char *error_string = NULL;
1426 if (!e || !pam_err) {
1430 ntstatus = e->nt_string;
1435 if (strcasecmp(ntstatus, nt_status_string) == 0) {
1437 error_string = _get_ntstatus_error_string(nt_status_string);
1439 _make_remark(ctx, PAM_ERROR_MSG, error_string);
1440 *pam_err = e->pam_error;
1444 if (e->display_string) {
1445 _make_remark(ctx, PAM_ERROR_MSG, _(e->display_string));
1446 *pam_err = e->pam_error;
1450 _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
1451 *pam_err = e->pam_error;
1460 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1462 * @param i The wbcUserPasswordPolicyInfo struct.
1464 * @return string (caller needs to talloc_free).
1467 static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
1468 struct wbcUserPasswordPolicyInfo *i)
1476 str = talloc_asprintf(ctx, _("Your password "));
1481 if (i->min_length_password > 0) {
1482 str = talloc_asprintf_append(str,
1483 _("must be at least %d characters; "),
1484 i->min_length_password);
1490 if (i->password_history > 0) {
1491 str = talloc_asprintf_append(str,
1492 _("cannot repeat any of your previous %d "
1494 i->password_history);
1500 if (i->password_properties & WBC_DOMAIN_PASSWORD_COMPLEX) {
1501 str = talloc_asprintf_append(str,
1502 _("must contain capitals, numerals "
1504 "and cannot contain your account "
1511 str = talloc_asprintf_append(str,
1512 _("Please type a different password. "
1513 "Type a password which meets these requirements in "
1514 "both text boxes."));
1526 static int _pam_create_homedir(struct pwb_context *ctx,
1527 const char *dirname,
1532 if (stat(dirname, &sbuf) == 0) {
1536 if (mkdir(dirname, mode) != 0) {
1538 _make_remark_format(ctx, PAM_TEXT_INFO,
1539 _("Creating directory: %s failed: %s"),
1540 dirname, strerror(errno));
1541 _pam_log(ctx, LOG_ERR, "could not create dir: %s (%s)",
1542 dirname, strerror(errno));
1543 return PAM_PERM_DENIED;
1549 static int _pam_chown_homedir(struct pwb_context *ctx,
1550 const char *dirname,
1554 if (chown(dirname, uid, gid) != 0) {
1555 _pam_log(ctx, LOG_ERR, "failed to chown user homedir: %s (%s)",
1556 dirname, strerror(errno));
1557 return PAM_PERM_DENIED;
1563 static int _pam_mkhomedir(struct pwb_context *ctx)
1565 struct passwd *pwd = NULL;
1567 char *create_dir = NULL;
1568 char *user_dir = NULL;
1570 const char *username;
1572 char *safe_ptr = NULL;
1575 /* Get the username */
1576 ret = pam_get_user(ctx->pamh, &username, NULL);
1577 if ((ret != PAM_SUCCESS) || (!username)) {
1578 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1579 return PAM_SERVICE_ERR;
1582 pwd = getpwnam(username);
1584 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1585 return PAM_USER_UNKNOWN;
1587 _pam_log_debug(ctx, LOG_DEBUG, "homedir is: %s", pwd->pw_dir);
1589 ret = _pam_create_homedir(ctx, pwd->pw_dir, 0700);
1590 if (ret == PAM_SUCCESS) {
1591 ret = _pam_chown_homedir(ctx, pwd->pw_dir,
1596 if (ret == PAM_SUCCESS) {
1600 /* maybe we need to create parent dirs */
1601 create_dir = talloc_strdup(ctx, "/");
1606 /* find final directory */
1607 user_dir = strrchr(pwd->pw_dir, '/');
1613 _pam_log(ctx, LOG_DEBUG, "final directory: %s", user_dir);
1617 while ((token = strtok_r(p, "/", &safe_ptr)) != NULL) {
1623 _pam_log_debug(ctx, LOG_DEBUG, "token is %s", token);
1625 create_dir = talloc_asprintf_append(create_dir, "%s/", token);
1629 _pam_log_debug(ctx, LOG_DEBUG, "current_dir is %s", create_dir);
1631 if (strcmp(token, user_dir) == 0) {
1632 _pam_log_debug(ctx, LOG_DEBUG, "assuming last directory: %s", token);
1636 ret = _pam_create_homedir(ctx, create_dir, mode);
1642 return _pam_chown_homedir(ctx, create_dir,
1647 /* talk to winbindd */
1648 static int winbind_auth_request(struct pwb_context *ctx,
1653 const int warn_pwd_expire,
1654 struct wbcAuthErrorInfo **p_error,
1655 struct wbcLogonUserInfo **p_info,
1656 struct wbcUserPasswordPolicyInfo **p_policy,
1657 time_t *pwd_last_set,
1662 struct wbcLogonUserParams logon;
1663 char membership_of[1024];
1664 uid_t user_uid = -1;
1665 uint32_t flags = WBFLAG_PAM_INFO3_TEXT |
1666 WBFLAG_PAM_GET_PWD_POLICY;
1668 struct wbcLogonUserInfo *info = NULL;
1669 struct wbcAuthUserInfo *user_info = NULL;
1670 struct wbcAuthErrorInfo *error = NULL;
1671 struct wbcUserPasswordPolicyInfo *policy = NULL;
1673 int ret = PAM_AUTH_ERR;
1675 const char *codes[] = {
1676 "NT_STATUS_PASSWORD_EXPIRED",
1677 "NT_STATUS_PASSWORD_MUST_CHANGE",
1678 "NT_STATUS_INVALID_WORKSTATION",
1679 "NT_STATUS_INVALID_LOGON_HOURS",
1680 "NT_STATUS_ACCOUNT_EXPIRED",
1681 "NT_STATUS_ACCOUNT_DISABLED",
1682 "NT_STATUS_ACCOUNT_LOCKED_OUT",
1683 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1684 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1685 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1686 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1687 "NT_STATUS_NO_LOGON_SERVERS",
1688 "NT_STATUS_WRONG_PASSWORD",
1689 "NT_STATUS_ACCESS_DENIED"
1696 /* Krb5 auth always has to go against the KDC of the user's realm */
1698 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1699 flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
1702 if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1703 struct passwd *pwd = NULL;
1705 pwd = getpwnam(user);
1707 return PAM_USER_UNKNOWN;
1709 user_uid = pwd->pw_uid;
1712 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1714 _pam_log_debug(ctx, LOG_DEBUG,
1715 "enabling krb5 login flag\n");
1717 flags |= WBFLAG_PAM_KRB5 |
1718 WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1721 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1722 _pam_log_debug(ctx, LOG_DEBUG,
1723 "enabling cached login flag\n");
1724 flags |= WBFLAG_PAM_CACHED_LOGIN;
1729 flags |= WBFLAG_PAM_UNIX_NAME;
1732 if (cctype != NULL) {
1733 _pam_log_debug(ctx, LOG_DEBUG,
1734 "enabling request for a %s krb5 ccache\n",
1738 if (member != NULL) {
1740 ZERO_STRUCT(membership_of);
1742 if (!winbind_name_list_to_sid_string_list(ctx, user, member,
1744 sizeof(membership_of))) {
1745 _pam_log_debug(ctx, LOG_ERR,
1746 "failed to serialize membership of sid "
1747 "\"%s\"\n", member);
1748 return PAM_AUTH_ERR;
1754 logon.username = user;
1755 logon.password = pass;
1758 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1762 discard_const_p(uint8_t, cctype),
1764 if (!WBC_ERROR_IS_OK(wbc_status)) {
1769 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1775 if (!WBC_ERROR_IS_OK(wbc_status)) {
1779 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1783 (uint8_t *)&user_uid,
1785 if (!WBC_ERROR_IS_OK(wbc_status)) {
1790 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1794 (uint8_t *)membership_of,
1795 sizeof(membership_of));
1796 if (!WBC_ERROR_IS_OK(wbc_status)) {
1801 wbc_status = wbcLogonUser(&logon, &info, &error, &policy);
1802 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1803 user, "wbcLogonUser");
1804 wbcFreeMemory(logon.blobs);
1807 if (info && info->info) {
1808 user_info = info->info;
1811 if (pwd_last_set && user_info) {
1812 *pwd_last_set = user_info->pass_last_set_time;
1815 if (p_info && info) {
1819 if (p_policy && policy) {
1823 if (p_error && error) {
1824 /* We want to process the error in the caller. */
1829 for (i=0; i<ARRAY_SIZE(codes); i++) {
1831 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1837 if ((ret == PAM_SUCCESS) && user_info && policy && info) {
1839 bool already_expired = false;
1840 bool change_pwd = false;
1842 /* warn a user if the password is about to expire soon */
1843 _pam_warn_password_expiry(ctx, user_info, policy,
1848 if (already_expired == true) {
1850 SMB_TIME_T last_set = user_info->pass_last_set_time;
1852 _pam_log_debug(ctx, LOG_DEBUG,
1853 "Password has expired "
1854 "(Password was last set: %lld, "
1855 "the policy says it should expire here "
1856 "%lld (now it's: %ld))\n",
1857 (long long int)last_set,
1858 (long long int)last_set +
1862 return PAM_AUTHTOK_EXPIRED;
1866 ret = PAM_NEW_AUTHTOK_REQD;
1870 /* inform about logon type */
1871 _pam_warn_logon_type(ctx, user, user_info->user_flags);
1873 /* inform about krb5 failures */
1874 _pam_warn_krb5_failure(ctx, user, user_info->user_flags);
1876 /* set some info3 info for other modules in the stack */
1877 _pam_set_data_info3(ctx, user_info);
1879 /* put krb5ccname into env */
1880 _pam_setup_krb5_env(ctx, info);
1882 /* If winbindd returned a username, return the pointer to it
1884 _pam_setup_unix_username(ctx, user_ret, info);
1888 wbcFreeMemory(logon.blobs);
1889 if (info && info->blobs && !p_info) {
1890 wbcFreeMemory(info->blobs);
1892 if (error && !p_error) {
1893 wbcFreeMemory(error);
1895 if (info && !p_info) {
1896 wbcFreeMemory(info);
1898 if (policy && !p_policy) {
1899 wbcFreeMemory(policy);
1905 /* talk to winbindd */
1906 static int winbind_chauthtok_request(struct pwb_context *ctx,
1908 const char *oldpass,
1909 const char *newpass,
1910 time_t pwd_last_set)
1913 struct wbcChangePasswordParams params;
1914 struct wbcAuthErrorInfo *error = NULL;
1915 struct wbcUserPasswordPolicyInfo *policy = NULL;
1916 enum wbcPasswordChangeRejectReason reject_reason = -1;
1920 const char *codes[] = {
1921 "NT_STATUS_BACKUP_CONTROLLER",
1922 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1923 "NT_STATUS_NO_LOGON_SERVERS",
1924 "NT_STATUS_ACCESS_DENIED",
1925 "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1926 "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1927 "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1929 int ret = PAM_AUTH_ERR;
1931 ZERO_STRUCT(params);
1933 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1934 flags |= WBFLAG_PAM_KRB5 |
1935 WBFLAG_PAM_CONTACT_TRUSTDOM;
1938 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1939 flags |= WBFLAG_PAM_CACHED_LOGIN;
1942 params.account_name = user;
1943 params.level = WBC_CHANGE_PASSWORD_LEVEL_PLAIN;
1944 params.old_password.plaintext = oldpass;
1945 params.new_password.plaintext = newpass;
1946 params.flags = flags;
1948 wbc_status = wbcChangeUserPasswordEx(¶ms, &error, &reject_reason, &policy);
1949 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1950 user, "wbcChangeUserPasswordEx");
1952 if (WBC_ERROR_IS_OK(wbc_status)) {
1953 _pam_log(ctx, LOG_NOTICE,
1954 "user '%s' password changed", user);
1959 wbcFreeMemory(policy);
1963 for (i=0; i<ARRAY_SIZE(codes); i++) {
1965 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1971 if (!strcasecmp(error->nt_string,
1972 "NT_STATUS_PASSWORD_RESTRICTION")) {
1974 char *pwd_restriction_string = NULL;
1975 SMB_TIME_T min_pwd_age = 0;
1978 min_pwd_age = policy->min_passwordage;
1981 /* FIXME: avoid to send multiple PAM messages after another */
1982 switch (reject_reason) {
1985 case WBC_PWD_CHANGE_NO_ERROR:
1986 if ((min_pwd_age > 0) &&
1987 (pwd_last_set + min_pwd_age > time(NULL))) {
1988 PAM_WB_REMARK_DIRECT(ctx,
1989 "NT_STATUS_PWD_TOO_RECENT");
1992 case WBC_PWD_CHANGE_PASSWORD_TOO_SHORT:
1993 PAM_WB_REMARK_DIRECT(ctx,
1994 "NT_STATUS_PWD_TOO_SHORT");
1996 case WBC_PWD_CHANGE_PWD_IN_HISTORY:
1997 PAM_WB_REMARK_DIRECT(ctx,
1998 "NT_STATUS_PWD_HISTORY_CONFLICT");
2000 case WBC_PWD_CHANGE_NOT_COMPLEX:
2001 _make_remark(ctx, PAM_ERROR_MSG,
2002 _("Password does not meet "
2003 "complexity requirements"));
2006 _pam_log_debug(ctx, LOG_DEBUG,
2007 "unknown password change "
2008 "reject reason: %d",
2013 pwd_restriction_string =
2014 _pam_compose_pwd_restriction_string(ctx, policy);
2015 if (pwd_restriction_string) {
2016 _make_remark(ctx, PAM_ERROR_MSG,
2017 pwd_restriction_string);
2018 TALLOC_FREE(pwd_restriction_string);
2022 wbcFreeMemory(error);
2023 wbcFreeMemory(policy);
2029 * Checks if a user has an account
2032 * 1 = User not found
2036 static int valid_user(struct pwb_context *ctx,
2039 /* check not only if the user is available over NSS calls, also make
2040 * sure it's really a winbind user, this is important when stacking PAM
2041 * modules in the 'account' or 'password' facility. */
2044 struct passwd *pwd = NULL;
2045 struct passwd *wb_pwd = NULL;
2047 pwd = getpwnam(user);
2052 wbc_status = wbcGetpwnam(user, &wb_pwd);
2053 wbcFreeMemory(wb_pwd);
2054 if (!WBC_ERROR_IS_OK(wbc_status)) {
2055 _pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
2056 wbcErrorString(wbc_status));
2059 switch (wbc_status) {
2060 case WBC_ERR_UNKNOWN_USER:
2061 /* match other insane libwbclient return codes */
2062 case WBC_ERR_WINBIND_NOT_AVAILABLE:
2063 case WBC_ERR_DOMAIN_NOT_FOUND:
2065 case WBC_ERR_SUCCESS:
2073 static char *_pam_delete(register char *xx)
2081 * obtain a password from the user
2084 static int _winbind_read_password(struct pwb_context *ctx,
2086 const char *comment,
2087 const char *prompt1,
2088 const char *prompt2,
2096 _pam_log(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
2099 * make sure nothing inappropriate gets returned
2102 *pass = token = NULL;
2105 * which authentication token are we getting?
2108 if (on(WINBIND__OLD_PASSWORD, ctrl)) {
2109 authtok_flag = PAM_OLDAUTHTOK;
2111 authtok_flag = PAM_AUTHTOK;
2115 * should we obtain the password from a PAM item ?
2118 if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
2119 on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2120 retval = pam_get_item(ctx->pamh,
2122 (const void **) &item);
2123 if (retval != PAM_SUCCESS) {
2125 _pam_log(ctx, LOG_ALERT,
2126 "pam_get_item returned error "
2127 "to unix-read-password");
2129 } else if (item != NULL) { /* we have a password! */
2132 _pam_log(ctx, LOG_DEBUG,
2133 "pam_get_item returned a password");
2135 } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2136 return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
2137 } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
2138 && off(WINBIND__OLD_PASSWORD, ctrl)) {
2139 return PAM_AUTHTOK_RECOVER_ERR;
2143 * getting here implies we will have to get the password from the
2148 struct pam_message msg[3], *pmsg[3];
2149 struct pam_response *resp;
2152 /* prepare to converse */
2154 if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
2156 msg[0].msg_style = PAM_TEXT_INFO;
2157 msg[0].msg = discard_const_p(char, comment);
2164 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2165 msg[i++].msg = discard_const_p(char, prompt1);
2168 if (prompt2 != NULL) {
2170 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2171 msg[i++].msg = discard_const_p(char, prompt2);
2174 /* so call the conversation expecting i responses */
2176 retval = converse(ctx->pamh, i, pmsg, &resp);
2178 if (retval == PAM_SUCCESS) {
2179 retval = PAM_AUTHTOK_RECOVER_ERR;
2183 if (retval != PAM_SUCCESS) {
2184 _pam_drop_reply(resp, i);
2188 /* interpret the response */
2190 token = x_strdup(resp[i - replies].resp);
2192 _pam_log(ctx, LOG_NOTICE,
2193 "could not recover "
2194 "authentication token");
2195 retval = PAM_AUTHTOK_RECOVER_ERR;
2200 /* verify that password entered correctly */
2201 if (!resp[i - 1].resp ||
2202 strcmp(token, resp[i - 1].resp)) {
2203 _pam_delete(token); /* mistyped */
2204 retval = PAM_AUTHTOK_RECOVER_ERR;
2205 _make_remark(ctx, PAM_ERROR_MSG,
2211 * tidy up the conversation (resp_retcode) is ignored
2212 * -- what is it for anyway? AGM
2214 _pam_drop_reply(resp, i);
2218 if (retval != PAM_SUCCESS) {
2219 _pam_log_debug(ctx, LOG_DEBUG,
2220 "unable to obtain a password");
2223 /* 'token' is the entered password */
2225 /* we store this password as an item */
2227 retval = pam_set_item(ctx->pamh, authtok_flag, token);
2228 _pam_delete(token); /* clean it up */
2229 if (retval != PAM_SUCCESS ||
2230 (retval = pam_get_item(ctx->pamh, authtok_flag, (const void **) &item)) != PAM_SUCCESS) {
2232 _pam_log(ctx, LOG_CRIT, "error manipulating password");
2238 item = NULL; /* break link to password */
2243 static const char *get_conf_item_string(struct pwb_context *ctx,
2248 const char *parm_opt = NULL;
2250 if (!(ctx->ctrl & config_flag)) {
2254 /* let the pam opt take precedence over the pam_winbind.conf option */
2255 for (i=0; i<ctx->argc; i++) {
2257 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2260 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2261 _pam_log(ctx, LOG_INFO,
2262 "no \"=\" delimiter for \"%s\" found\n",
2266 _pam_log_debug(ctx, LOG_INFO,
2267 "PAM config: %s '%s'\n", item, p+1);
2275 key = talloc_asprintf(ctx, "global:%s", item);
2280 parm_opt = iniparser_getstring_nonempty(ctx->dict, key, NULL);
2283 _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
2290 static int get_config_item_int(struct pwb_context *ctx,
2294 int i, parm_opt = -1;
2296 if (!(ctx->ctrl & config_flag)) {
2300 /* let the pam opt take precedence over the pam_winbind.conf option */
2301 for (i = 0; i < ctx->argc; i++) {
2303 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2306 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2307 _pam_log(ctx, LOG_INFO,
2308 "no \"=\" delimiter for \"%s\" found\n",
2312 parm_opt = atoi(p + 1);
2313 _pam_log_debug(ctx, LOG_INFO,
2314 "PAM config: %s '%d'\n",
2323 key = talloc_asprintf(ctx, "global:%s", item);
2328 parm_opt = iniparser_getint(ctx->dict, key, -1);
2331 _pam_log_debug(ctx, LOG_INFO,
2332 "CONFIG file: %s '%d'\n",
2339 static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
2341 return get_conf_item_string(ctx, "krb5_ccache_type",
2342 WINBIND_KRB5_CCACHE_TYPE);
2345 static const char *get_member_from_config(struct pwb_context *ctx)
2347 const char *ret = NULL;
2348 ret = get_conf_item_string(ctx, "require_membership_of",
2349 WINBIND_REQUIRED_MEMBERSHIP);
2353 return get_conf_item_string(ctx, "require-membership-of",
2354 WINBIND_REQUIRED_MEMBERSHIP);
2357 static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
2360 ret = get_config_item_int(ctx, "warn_pwd_expire",
2361 WINBIND_WARN_PWD_EXPIRE);
2362 /* no or broken setting */
2364 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
2370 * Retrieve the winbind separator.
2372 * @param ctx PAM winbind context.
2374 * @return string separator character. NULL on failure.
2377 static char winbind_get_separator(struct pwb_context *ctx)
2380 static struct wbcInterfaceDetails *details = NULL;
2382 wbc_status = wbcInterfaceDetails(&details);
2383 if (!WBC_ERROR_IS_OK(wbc_status)) {
2384 _pam_log(ctx, LOG_ERR,
2385 "Could not retrieve winbind interface details: %s",
2386 wbcErrorString(wbc_status));
2394 return details->winbind_separator;
2399 * Convert a upn to a name.
2401 * @param ctx PAM winbind context.
2402 * @param upn USer UPN to be trabslated.
2404 * @return converted name. NULL pointer on failure. Caller needs to free.
2407 static char* winbind_upn_to_username(struct pwb_context *ctx,
2411 wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
2412 struct wbcDomainSid sid;
2413 enum wbcSidType type;
2414 char *domain = NULL;
2418 /* This cannot work when the winbind separator = @ */
2420 sep = winbind_get_separator(ctx);
2421 if (!sep || sep == '@') {
2425 name = talloc_strdup(ctx, upn);
2429 if ((p = strchr(name, '@')) != NULL) {
2434 /* Convert the UPN to a SID */
2436 wbc_status = wbcLookupName(domain, name, &sid, &type);
2437 if (!WBC_ERROR_IS_OK(wbc_status)) {
2441 /* Convert the the SID back to the sAMAccountName */
2443 wbc_status = wbcLookupSid(&sid, &domain, &name, &type);
2444 if (!WBC_ERROR_IS_OK(wbc_status)) {
2448 return talloc_asprintf(ctx, "%s%c%s", domain, sep, name);
2451 static int _pam_delete_cred(pam_handle_t *pamh, int flags,
2452 int argc, const char **argv)
2454 int retval = PAM_SUCCESS;
2455 struct pwb_context *ctx = NULL;
2456 struct wbcLogoffUserParams logoff;
2457 struct wbcAuthErrorInfo *error = NULL;
2459 wbcErr wbc_status = WBC_ERR_SUCCESS;
2461 ZERO_STRUCT(logoff);
2463 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2468 _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
2470 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2472 /* destroy the ccache here */
2474 uint32_t wbc_flags = 0;
2475 const char *ccname = NULL;
2476 struct passwd *pwd = NULL;
2478 retval = pam_get_user(pamh, &user, _("Username: "));
2480 _pam_log(ctx, LOG_ERR,
2481 "could not identify user");
2486 _pam_log(ctx, LOG_ERR,
2487 "username was NULL!");
2488 retval = PAM_USER_UNKNOWN;
2492 _pam_log_debug(ctx, LOG_DEBUG,
2493 "username [%s] obtained", user);
2495 ccname = pam_getenv(pamh, "KRB5CCNAME");
2496 if (ccname == NULL) {
2497 _pam_log_debug(ctx, LOG_DEBUG,
2498 "user has no KRB5CCNAME environment");
2501 pwd = getpwnam(user);
2503 retval = PAM_USER_UNKNOWN;
2507 wbc_flags = WBFLAG_PAM_KRB5 |
2508 WBFLAG_PAM_CONTACT_TRUSTDOM;
2510 logoff.username = user;
2513 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2517 discard_const_p(uint8_t, ccname),
2519 if (!WBC_ERROR_IS_OK(wbc_status)) {
2524 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2528 (uint8_t *)&wbc_flags,
2530 if (!WBC_ERROR_IS_OK(wbc_status)) {
2534 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2538 (uint8_t *)&pwd->pw_uid,
2539 sizeof(pwd->pw_uid));
2540 if (!WBC_ERROR_IS_OK(wbc_status)) {
2544 wbc_status = wbcLogoffUserEx(&logoff, &error);
2545 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2546 user, "wbcLogoffUser");
2547 wbcFreeMemory(error);
2548 wbcFreeMemory(logoff.blobs);
2549 logoff.blobs = NULL;
2551 if (!WBC_ERROR_IS_OK(wbc_status)) {
2552 _pam_log(ctx, LOG_INFO,
2553 "failed to logoff user %s: %s\n",
2554 user, wbcErrorString(wbc_status));
2560 wbcFreeMemory(logoff.blobs);
2563 if (!WBC_ERROR_IS_OK(wbc_status)) {
2564 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2565 user, "wbcLogoffUser");
2569 * Delete the krb5 ccname variable from the PAM environment
2570 * if it was set by winbind.
2572 if ((ctx->ctrl & WINBIND_KRB5_AUTH) && pam_getenv(pamh, "KRB5CCNAME")) {
2573 pam_putenv(pamh, "KRB5CCNAME");
2576 _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx, retval);
2584 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
2585 int argc, const char **argv)
2587 const char *username;
2588 const char *password;
2589 const char *member = NULL;
2590 const char *cctype = NULL;
2591 int warn_pwd_expire;
2592 int retval = PAM_AUTH_ERR;
2593 char *username_ret = NULL;
2594 char *new_authtok_required = NULL;
2595 char *real_username = NULL;
2596 struct pwb_context *ctx = NULL;
2598 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2603 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
2605 /* Get the username */
2606 retval = pam_get_user(pamh, &username, NULL);
2607 if ((retval != PAM_SUCCESS) || (!username)) {
2608 _pam_log_debug(ctx, LOG_DEBUG,
2609 "can not get the username");
2610 retval = PAM_SERVICE_ERR;
2616 /* Decode the user name since AIX does not support logn user
2617 names by default. The name is encoded as _#uid. */
2619 if (username[0] == '_') {
2620 uid_t id = atoi(&username[1]);
2621 struct passwd *pw = NULL;
2623 if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
2624 real_username = strdup(pw->pw_name);
2629 if (!real_username) {
2630 /* Just making a copy of the username we got from PAM */
2631 if ((real_username = strdup(username)) == NULL) {
2632 _pam_log_debug(ctx, LOG_DEBUG,
2633 "memory allocation failure when copying "
2635 retval = PAM_SERVICE_ERR;
2640 /* Maybe this was a UPN */
2642 if (strchr(real_username, '@') != NULL) {
2643 char *samaccountname = NULL;
2645 samaccountname = winbind_upn_to_username(ctx,
2647 if (samaccountname) {
2648 free(real_username);
2649 real_username = strdup(samaccountname);
2653 retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
2654 _("Password: "), NULL,
2657 if (retval != PAM_SUCCESS) {
2658 _pam_log(ctx, LOG_ERR,
2659 "Could not retrieve user's password");
2660 retval = PAM_AUTHTOK_ERR;
2664 /* Let's not give too much away in the log file */
2666 #ifdef DEBUG_PASSWORD
2667 _pam_log_debug(ctx, LOG_INFO,
2668 "Verify user '%s' with password '%s'",
2669 real_username, password);
2671 _pam_log_debug(ctx, LOG_INFO,
2672 "Verify user '%s'", real_username);
2675 member = get_member_from_config(ctx);
2676 cctype = get_krb5_cc_type_from_config(ctx);
2677 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2679 /* Now use the username to look up password */
2680 retval = winbind_auth_request(ctx, real_username, password,
2681 member, cctype, warn_pwd_expire,
2683 NULL, &username_ret);
2685 if (retval == PAM_NEW_AUTHTOK_REQD ||
2686 retval == PAM_AUTHTOK_EXPIRED) {
2688 char *new_authtok_required_during_auth = NULL;
2690 new_authtok_required = talloc_asprintf(NULL, "%d", retval);
2691 if (!new_authtok_required) {
2692 retval = PAM_BUF_ERR;
2696 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2697 new_authtok_required,
2698 _pam_winbind_cleanup_func);
2700 retval = PAM_SUCCESS;
2702 new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
2703 if (!new_authtok_required_during_auth) {
2704 retval = PAM_BUF_ERR;
2708 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2709 new_authtok_required_during_auth,
2710 _pam_winbind_cleanup_func);
2717 pam_set_item (pamh, PAM_USER, username_ret);
2718 _pam_log_debug(ctx, LOG_INFO,
2719 "Returned user was '%s'", username_ret);
2723 if (real_username) {
2724 free(real_username);
2727 if (!new_authtok_required) {
2728 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2731 if (retval != PAM_SUCCESS) {
2732 _pam_free_data_info3(pamh);
2736 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
2744 int pam_sm_setcred(pam_handle_t *pamh, int flags,
2745 int argc, const char **argv)
2747 int ret = PAM_SYSTEM_ERR;
2748 struct pwb_context *ctx = NULL;
2750 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2755 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
2757 switch (flags & ~PAM_SILENT) {
2759 case PAM_DELETE_CRED:
2760 ret = _pam_delete_cred(pamh, flags, argc, argv);
2762 case PAM_REFRESH_CRED:
2763 _pam_log_debug(ctx, LOG_WARNING,
2764 "PAM_REFRESH_CRED not implemented");
2767 case PAM_REINITIALIZE_CRED:
2768 _pam_log_debug(ctx, LOG_WARNING,
2769 "PAM_REINITIALIZE_CRED not implemented");
2772 case PAM_ESTABLISH_CRED:
2773 _pam_log_debug(ctx, LOG_WARNING,
2774 "PAM_ESTABLISH_CRED not implemented");
2778 ret = PAM_SYSTEM_ERR;
2784 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
2792 * Account management. We want to verify that the account exists
2793 * before returning PAM_SUCCESS
2796 int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2797 int argc, const char **argv)
2799 const char *username;
2800 int ret = PAM_USER_UNKNOWN;
2801 const char *tmp = NULL;
2802 struct pwb_context *ctx = NULL;
2804 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2809 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
2812 /* Get the username */
2813 ret = pam_get_user(pamh, &username, NULL);
2814 if ((ret != PAM_SUCCESS) || (!username)) {
2815 _pam_log_debug(ctx, LOG_DEBUG,
2816 "can not get the username");
2817 ret = PAM_SERVICE_ERR;
2821 /* Verify the username */
2822 ret = valid_user(ctx, username);
2825 /* some sort of system error. The log was already printed */
2826 ret = PAM_SERVICE_ERR;
2829 /* the user does not exist */
2830 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
2832 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
2836 ret = PAM_USER_UNKNOWN;
2839 pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2840 (const void **)&tmp);
2844 case PAM_AUTHTOK_EXPIRED:
2845 /* fall through, since new token is required in this case */
2846 case PAM_NEW_AUTHTOK_REQD:
2847 _pam_log(ctx, LOG_WARNING,
2848 "pam_sm_acct_mgmt success but %s is set",
2849 PAM_WINBIND_NEW_AUTHTOK_REQD);
2850 _pam_log(ctx, LOG_NOTICE,
2851 "user '%s' needs new password",
2853 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2854 ret = PAM_NEW_AUTHTOK_REQD;
2857 _pam_log(ctx, LOG_WARNING,
2858 "pam_sm_acct_mgmt success");
2859 _pam_log(ctx, LOG_NOTICE,
2860 "user '%s' granted access", username);
2866 /* Otherwise, the authentication looked good */
2867 _pam_log(ctx, LOG_NOTICE,
2868 "user '%s' granted access", username);
2872 /* we don't know anything about this return value */
2873 _pam_log(ctx, LOG_ERR,
2874 "internal module error (ret = %d, user = '%s')",
2876 ret = PAM_SERVICE_ERR;
2880 /* should not be reached */
2885 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
2893 int pam_sm_open_session(pam_handle_t *pamh, int flags,
2894 int argc, const char **argv)
2896 int ret = PAM_SUCCESS;
2897 struct pwb_context *ctx = NULL;
2899 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2904 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
2906 if (ctx->ctrl & WINBIND_MKHOMEDIR) {
2907 /* check and create homedir */
2908 ret = _pam_mkhomedir(ctx);
2911 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
2919 int pam_sm_close_session(pam_handle_t *pamh, int flags,
2920 int argc, const char **argv)
2922 int ret = PAM_SUCCESS;
2923 struct pwb_context *ctx = NULL;
2925 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2930 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
2933 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
2941 * evaluate whether we need to re-authenticate with kerberos after a
2944 * @param ctx PAM winbind context.
2945 * @param user The username
2947 * @return boolean Returns true if required, false if not.
2950 static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
2954 /* Make sure that we only do this if a) the chauthtok got initiated
2955 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2956 * later password change via the "passwd" command if done by the user
2958 * NB. If we login from gdm or xdm and the password expires,
2959 * we change the password, but there is no memory cache.
2960 * Thus, even for passthrough login, we should do the
2961 * authentication again to update memory cache.
2965 char *new_authtok_reqd_during_auth = NULL;
2966 struct passwd *pwd = NULL;
2968 pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2969 (const void **) &new_authtok_reqd_during_auth);
2970 pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2973 if (new_authtok_reqd_during_auth) {
2977 pwd = getpwnam(user);
2982 if (getuid() == pwd->pw_uid) {
2991 int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
2992 int argc, const char **argv)
2996 bool cached_login = false;
2998 /* <DO NOT free() THESE> */
3000 const char *pass_old;
3001 const char *pass_new;
3002 /* </DO NOT free() THESE> */
3007 char *username_ret = NULL;
3008 struct wbcAuthErrorInfo *error = NULL;
3009 struct pwb_context *ctx = NULL;
3011 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
3016 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
3018 cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
3020 /* clearing offline bit for auth */
3021 ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
3024 * First get the name of a user
3026 ret = pam_get_user(pamh, &user, _("Username: "));
3028 _pam_log(ctx, LOG_ERR,
3029 "password - could not identify user");
3034 _pam_log(ctx, LOG_ERR, "username was NULL!");
3035 ret = PAM_USER_UNKNOWN;
3039 _pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
3041 /* check if this is really a user in winbindd, not only in NSS */
3042 ret = valid_user(ctx, user);
3045 ret = PAM_USER_UNKNOWN;
3048 ret = PAM_SYSTEM_ERR;
3055 * obtain and verify the current password (OLDAUTHTOK) for
3059 if (flags & PAM_PRELIM_CHECK) {
3060 time_t pwdlastset_prelim = 0;
3062 /* instruct user what is happening */
3064 #define greeting _("Changing password for")
3065 Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
3067 _pam_log(ctx, LOG_CRIT,
3068 "password - out of memory");
3074 lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
3075 ret = _winbind_read_password(ctx, lctrl,
3077 _("(current) NT password: "),
3079 (const char **) &pass_old);
3080 TALLOC_FREE(Announce);
3081 if (ret != PAM_SUCCESS) {
3082 _pam_log(ctx, LOG_NOTICE,
3083 "password - (old) token not obtained");
3087 /* verify that this is the password for this user */
3089 ret = winbind_auth_request(ctx, user, pass_old,
3092 &pwdlastset_prelim, NULL);
3094 if (ret != PAM_ACCT_EXPIRED &&
3095 ret != PAM_AUTHTOK_EXPIRED &&
3096 ret != PAM_NEW_AUTHTOK_REQD &&
3097 ret != PAM_SUCCESS) {
3102 pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3103 (void *)pwdlastset_prelim, NULL);
3105 ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
3106 (const void *) pass_old);
3108 if (ret != PAM_SUCCESS) {
3109 _pam_log(ctx, LOG_CRIT,
3110 "failed to set PAM_OLDAUTHTOK");
3112 } else if (flags & PAM_UPDATE_AUTHTOK) {
3114 time_t pwdlastset_update = 0;
3117 * obtain the proposed password
3121 * get the old token back.
3124 ret = pam_get_item(pamh, PAM_OLDAUTHTOK, (const void **) &pass_old);
3126 if (ret != PAM_SUCCESS) {
3127 _pam_log(ctx, LOG_NOTICE,
3128 "user not authenticated");
3132 lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
3134 if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
3135 lctrl |= WINBIND_USE_FIRST_PASS_ARG;
3138 ret = PAM_AUTHTOK_ERR;
3139 while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
3141 * use_authtok is to force the use of a previously entered
3142 * password -- needed for pluggable password strength checking
3145 ret = _winbind_read_password(ctx, lctrl,
3147 _("Enter new NT password: "),
3148 _("Retype new NT password: "),
3149 (const char **)&pass_new);
3151 if (ret != PAM_SUCCESS) {
3152 _pam_log_debug(ctx, LOG_ALERT,
3154 "new password not obtained");
3155 pass_old = NULL;/* tidy up */
3160 * At this point we know who the user is and what they
3161 * propose as their new password. Verify that the new
3162 * password is acceptable.
3165 if (pass_new[0] == '\0') {/* "\0" password = NULL */
3171 * By reaching here we have approved the passwords and must now
3172 * rebuild the password database file.
3174 pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3175 (const void **) &pwdlastset_update);
3178 * if cached creds were enabled, make sure to set the
3179 * WINBIND_CACHED_LOGIN bit here in order to have winbindd
3180 * update the cached creds storage - gd
3183 ctx->ctrl |= WINBIND_CACHED_LOGIN;
3186 ret = winbind_chauthtok_request(ctx, user, pass_old,
3187 pass_new, pwdlastset_update);
3189 pass_old = pass_new = NULL;
3193 if (_pam_require_krb5_auth_after_chauthtok(ctx, user)) {
3195 const char *member = NULL;
3196 const char *cctype = NULL;
3197 int warn_pwd_expire;
3198 struct wbcLogonUserInfo *info = NULL;
3199 struct wbcUserPasswordPolicyInfo *policy = NULL;
3201 member = get_member_from_config(ctx);
3202 cctype = get_krb5_cc_type_from_config(ctx);
3203 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
3205 /* Keep WINBIND_CACHED_LOGIN bit for
3206 * authentication after changing the password.
3207 * This will update the cached credentials in case
3208 * that winbindd_dual_pam_chauthtok() fails
3213 ret = winbind_auth_request(ctx, user, pass_new,
3215 &error, &info, &policy,
3216 NULL, &username_ret);
3217 pass_old = pass_new = NULL;
3219 if (ret == PAM_SUCCESS) {
3221 struct wbcAuthUserInfo *user_info = NULL;
3223 if (info && info->info) {
3224 user_info = info->info;
3227 /* warn a user if the password is about to
3229 _pam_warn_password_expiry(ctx, user_info, policy,
3233 /* set some info3 info for other modules in the
3235 _pam_set_data_info3(ctx, user_info);
3237 /* put krb5ccname into env */
3238 _pam_setup_krb5_env(ctx, info);
3241 pam_set_item(pamh, PAM_USER,
3243 _pam_log_debug(ctx, LOG_INFO,
3244 "Returned user was '%s'",
3251 if (info && info->blobs) {
3252 wbcFreeMemory(info->blobs);
3254 wbcFreeMemory(info);
3255 wbcFreeMemory(policy);
3260 ret = PAM_SERVICE_ERR;
3265 /* Deal with offline errors. */
3267 const char *codes[] = {
3268 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3269 "NT_STATUS_NO_LOGON_SERVERS",
3270 "NT_STATUS_ACCESS_DENIED"
3273 for (i=0; i<ARRAY_SIZE(codes); i++) {
3275 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
3281 wbcFreeMemory(error);
3283 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
3292 /* static module data */
3294 struct pam_module _pam_winbind_modstruct = {
3296 pam_sm_authenticate,
3299 pam_sm_open_session,
3300 pam_sm_close_session,
3307 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3308 * Copyright (c) Tim Potter <tpot@samba.org> 2000
3309 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3310 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3311 * Copyright (c) Jan Rêkorajski 1999.
3312 * Copyright (c) Andrew G. Morgan 1996-8.
3313 * Copyright (c) Alex O. Yuriev, 1996.
3314 * Copyright (c) Cristian Gafton 1996.
3315 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3317 * Redistribution and use in source and binary forms, with or without
3318 * modification, are permitted provided that the following conditions
3320 * 1. Redistributions of source code must retain the above copyright
3321 * notice, and the entire permission notice in its entirety,
3322 * including the disclaimer of warranties.
3323 * 2. Redistributions in binary form must reproduce the above copyright
3324 * notice, this list of conditions and the following disclaimer in the
3325 * documentation and/or other materials provided with the distribution.
3326 * 3. The name of the author may not be used to endorse or promote
3327 * products derived from this software without specific prior
3328 * written permission.
3330 * ALTERNATIVELY, this product may be distributed under the terms of
3331 * the GNU Public License, in which case the provisions of the GPL are
3332 * required INSTEAD OF the above restrictions. (This clause is
3333 * necessary due to a potential bad interaction between the GPL and
3334 * the restrictions contained in a BSD-style copyright.)
3336 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3337 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3338 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3339 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3340 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3341 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3342 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3343 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3344 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3345 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3346 * OF THE POSSIBILITY OF SUCH DAMAGE.