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"
15 static int wbc_error_to_pam_error(wbcErr status
)
20 case WBC_ERR_NOT_IMPLEMENTED
:
21 return PAM_SERVICE_ERR
;
22 case WBC_ERR_UNKNOWN_FAILURE
:
24 case WBC_ERR_NO_MEMORY
:
26 case WBC_ERR_INVALID_SID
:
27 case WBC_ERR_INVALID_PARAM
:
29 case WBC_ERR_WINBIND_NOT_AVAILABLE
:
30 return PAM_AUTHINFO_UNAVAIL
;
31 case WBC_ERR_DOMAIN_NOT_FOUND
:
32 return PAM_AUTHINFO_UNAVAIL
;
33 case WBC_ERR_INVALID_RESPONSE
:
35 case WBC_ERR_NSS_ERROR
:
36 return PAM_USER_UNKNOWN
;
37 case WBC_ERR_AUTH_ERROR
:
39 case WBC_ERR_UNKNOWN_USER
:
40 return PAM_USER_UNKNOWN
;
41 case WBC_ERR_UNKNOWN_GROUP
:
42 return PAM_USER_UNKNOWN
;
43 case WBC_ERR_PWD_CHANGE_FAILED
:
51 static const char *_pam_error_code_str(int err
)
57 return "PAM_OPEN_ERR";
59 return "PAM_SYMBOL_ERR";
61 return "PAM_SERVICE_ERR";
63 return "PAM_SYSTEM_ERR";
67 return "PAM_PERM_DENIED";
69 return "PAM_AUTH_ERR";
70 case PAM_CRED_INSUFFICIENT
:
71 return "PAM_CRED_INSUFFICIENT";
72 case PAM_AUTHINFO_UNAVAIL
:
73 return "PAM_AUTHINFO_UNAVAIL";
74 case PAM_USER_UNKNOWN
:
75 return "PAM_USER_UNKNOWN";
77 return "PAM_MAXTRIES";
78 case PAM_NEW_AUTHTOK_REQD
:
79 return "PAM_NEW_AUTHTOK_REQD";
80 case PAM_ACCT_EXPIRED
:
81 return "PAM_ACCT_EXPIRED";
83 return "PAM_SESSION_ERR";
84 case PAM_CRED_UNAVAIL
:
85 return "PAM_CRED_UNAVAIL";
86 case PAM_CRED_EXPIRED
:
87 return "PAM_CRED_EXPIRED";
89 return "PAM_CRED_ERR";
90 case PAM_NO_MODULE_DATA
:
91 return "PAM_NO_MODULE_DATA";
93 return "PAM_CONV_ERR";
95 return "PAM_AUTHTOK_ERR";
96 case PAM_AUTHTOK_RECOVERY_ERR
:
97 return "PAM_AUTHTOK_RECOVERY_ERR";
98 case PAM_AUTHTOK_LOCK_BUSY
:
99 return "PAM_AUTHTOK_LOCK_BUSY";
100 case PAM_AUTHTOK_DISABLE_AGING
:
101 return "PAM_AUTHTOK_DISABLE_AGING";
103 return "PAM_TRY_AGAIN";
108 case PAM_AUTHTOK_EXPIRED
:
109 return "PAM_AUTHTOK_EXPIRED";
110 #ifdef PAM_MODULE_UNKNOWN
111 case PAM_MODULE_UNKNOWN
:
112 return "PAM_MODULE_UNKNOWN";
116 return "PAM_BAD_ITEM";
118 #ifdef PAM_CONV_AGAIN
120 return "PAM_CONV_AGAIN";
122 #ifdef PAM_INCOMPLETE
124 return "PAM_INCOMPLETE";
131 #define _PAM_LOG_FUNCTION_ENTER(function, ctx) \
133 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] ENTER: " \
134 function " (flags: 0x%04x)", ctx->pamh, ctx->flags); \
135 _pam_log_state(ctx); \
138 #define _PAM_LOG_FUNCTION_LEAVE(function, ctx, retval) \
140 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] LEAVE: " \
141 function " returning %d (%s)", ctx->pamh, retval, \
142 _pam_error_code_str(retval)); \
143 _pam_log_state(ctx); \
148 #define MAX_PASSWD_TRIES 3
151 static char initialized
= 0;
153 static inline void textdomain_init(void);
154 static inline void textdomain_init(void)
157 bindtextdomain(MODULE_NAME
, dyn_LOCALEDIR
);
166 * Work around the pam API that has functions with void ** as parameters
167 * These lead to strict aliasing warnings with gcc.
169 static int _pam_get_item(const pam_handle_t
*pamh
,
173 const void **item
= (const void **)_item
;
174 return pam_get_item(pamh
, item_type
, item
);
176 static int _pam_get_data(const pam_handle_t
*pamh
,
177 const char *module_data_name
,
180 const void **data
= (const void **)_data
;
181 return pam_get_data(pamh
, module_data_name
, data
);
184 /* some syslogging */
186 #ifdef HAVE_PAM_VSYSLOG
187 static void _pam_log_int(const pam_handle_t
*pamh
,
192 pam_vsyslog(pamh
, err
, format
, args
);
195 static void _pam_log_int(const pam_handle_t
*pamh
,
200 char *format2
= NULL
;
203 _pam_get_item(pamh
, PAM_SERVICE
, &service
);
205 format2
= (char *)malloc(strlen(MODULE_NAME
)+strlen(format
)+strlen(service
)+5);
206 if (format2
== NULL
) {
207 /* what else todo ? */
208 vsyslog(err
, format
, args
);
212 sprintf(format2
, "%s(%s): %s", MODULE_NAME
, service
, format
);
213 vsyslog(err
, format2
, args
);
216 #endif /* HAVE_PAM_VSYSLOG */
218 static bool _pam_log_is_silent(int ctrl
)
220 return on(ctrl
, WINBIND_SILENT
);
223 static void _pam_log(struct pwb_context
*r
, int err
, const char *format
, ...) PRINTF_ATTRIBUTE(3,4);
224 static void _pam_log(struct pwb_context
*r
, int err
, const char *format
, ...)
228 if (_pam_log_is_silent(r
->ctrl
)) {
232 va_start(args
, format
);
233 _pam_log_int(r
->pamh
, err
, format
, args
);
236 static void __pam_log(const pam_handle_t
*pamh
, int ctrl
, int err
, const char *format
, ...) PRINTF_ATTRIBUTE(4,5);
237 static void __pam_log(const pam_handle_t
*pamh
, int ctrl
, int err
, const char *format
, ...)
241 if (_pam_log_is_silent(ctrl
)) {
245 va_start(args
, format
);
246 _pam_log_int(pamh
, err
, format
, args
);
250 static bool _pam_log_is_debug_enabled(int ctrl
)
256 if (_pam_log_is_silent(ctrl
)) {
260 if (!(ctrl
& WINBIND_DEBUG_ARG
)) {
267 static bool _pam_log_is_debug_state_enabled(int ctrl
)
269 if (!(ctrl
& WINBIND_DEBUG_STATE
)) {
273 return _pam_log_is_debug_enabled(ctrl
);
276 static void _pam_log_debug(struct pwb_context
*r
, int err
, const char *format
, ...) PRINTF_ATTRIBUTE(3,4);
277 static void _pam_log_debug(struct pwb_context
*r
, int err
, const char *format
, ...)
281 if (!_pam_log_is_debug_enabled(r
->ctrl
)) {
285 va_start(args
, format
);
286 _pam_log_int(r
->pamh
, err
, format
, args
);
289 static void __pam_log_debug(const pam_handle_t
*pamh
, int ctrl
, int err
, const char *format
, ...) PRINTF_ATTRIBUTE(4,5);
290 static void __pam_log_debug(const pam_handle_t
*pamh
, int ctrl
, int err
, const char *format
, ...)
294 if (!_pam_log_is_debug_enabled(ctrl
)) {
298 va_start(args
, format
);
299 _pam_log_int(pamh
, err
, format
, args
);
303 static void _pam_log_state_datum(struct pwb_context
*ctx
,
308 const void *data
= NULL
;
309 if (item_type
!= 0) {
310 pam_get_item(ctx
->pamh
, item_type
, &data
);
312 pam_get_data(ctx
->pamh
, key
, &data
);
315 const char *type
= (item_type
!= 0) ? "ITEM" : "DATA";
316 if (is_string
!= 0) {
317 _pam_log_debug(ctx
, LOG_DEBUG
,
318 "[pamh: %p] STATE: %s(%s) = \"%s\" (%p)",
319 ctx
->pamh
, type
, key
, (const char *)data
,
322 _pam_log_debug(ctx
, LOG_DEBUG
,
323 "[pamh: %p] STATE: %s(%s) = %p",
324 ctx
->pamh
, type
, key
, data
);
329 #define _PAM_LOG_STATE_DATA_POINTER(ctx, module_data_name) \
330 _pam_log_state_datum(ctx, 0, module_data_name, 0)
332 #define _PAM_LOG_STATE_DATA_STRING(ctx, module_data_name) \
333 _pam_log_state_datum(ctx, 0, module_data_name, 1)
335 #define _PAM_LOG_STATE_ITEM_POINTER(ctx, item_type) \
336 _pam_log_state_datum(ctx, item_type, #item_type, 0)
338 #define _PAM_LOG_STATE_ITEM_STRING(ctx, item_type) \
339 _pam_log_state_datum(ctx, item_type, #item_type, 1)
341 #ifdef DEBUG_PASSWORD
342 #define _LOG_PASSWORD_AS_STRING 1
344 #define _LOG_PASSWORD_AS_STRING 0
347 #define _PAM_LOG_STATE_ITEM_PASSWORD(ctx, item_type) \
348 _pam_log_state_datum(ctx, item_type, #item_type, \
349 _LOG_PASSWORD_AS_STRING)
351 static void _pam_log_state(struct pwb_context
*ctx
)
353 if (!_pam_log_is_debug_state_enabled(ctx
->ctrl
)) {
357 _PAM_LOG_STATE_ITEM_STRING(ctx
, PAM_SERVICE
);
358 _PAM_LOG_STATE_ITEM_STRING(ctx
, PAM_USER
);
359 _PAM_LOG_STATE_ITEM_STRING(ctx
, PAM_TTY
);
360 _PAM_LOG_STATE_ITEM_STRING(ctx
, PAM_RHOST
);
361 _PAM_LOG_STATE_ITEM_STRING(ctx
, PAM_RUSER
);
362 _PAM_LOG_STATE_ITEM_PASSWORD(ctx
, PAM_OLDAUTHTOK
);
363 _PAM_LOG_STATE_ITEM_PASSWORD(ctx
, PAM_AUTHTOK
);
364 _PAM_LOG_STATE_ITEM_STRING(ctx
, PAM_USER_PROMPT
);
365 _PAM_LOG_STATE_ITEM_POINTER(ctx
, PAM_CONV
);
366 #ifdef PAM_FAIL_DELAY
367 _PAM_LOG_STATE_ITEM_POINTER(ctx
, PAM_FAIL_DELAY
);
369 #ifdef PAM_REPOSITORY
370 _PAM_LOG_STATE_ITEM_POINTER(ctx
, PAM_REPOSITORY
);
373 _PAM_LOG_STATE_DATA_STRING(ctx
, PAM_WINBIND_HOMEDIR
);
374 _PAM_LOG_STATE_DATA_STRING(ctx
, PAM_WINBIND_LOGONSCRIPT
);
375 _PAM_LOG_STATE_DATA_STRING(ctx
, PAM_WINBIND_LOGONSERVER
);
376 _PAM_LOG_STATE_DATA_STRING(ctx
, PAM_WINBIND_PROFILEPATH
);
377 _PAM_LOG_STATE_DATA_STRING(ctx
,
378 PAM_WINBIND_NEW_AUTHTOK_REQD
);
379 /* Use atoi to get PAM result code */
380 _PAM_LOG_STATE_DATA_STRING(ctx
,
381 PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH
);
382 _PAM_LOG_STATE_DATA_POINTER(ctx
, PAM_WINBIND_PWD_LAST_SET
);
385 static int _pam_parse(const pam_handle_t
*pamh
,
389 dictionary
**result_d
)
392 const char *config_file
= NULL
;
395 dictionary
*d
= NULL
;
397 if (flags
& PAM_SILENT
) {
398 ctrl
|= WINBIND_SILENT
;
401 for (i
=argc
,v
=argv
; i
-- > 0; ++v
) {
402 if (!strncasecmp(*v
, "config", strlen("config"))) {
403 ctrl
|= WINBIND_CONFIG_FILE
;
409 if (config_file
== NULL
) {
410 config_file
= PAM_WINBIND_CONFIG_FILE
;
413 d
= iniparser_load(config_file
);
415 goto config_from_pam
;
418 if (iniparser_getboolean(d
, "global:debug", false)) {
419 ctrl
|= WINBIND_DEBUG_ARG
;
422 if (iniparser_getboolean(d
, "global:debug_state", false)) {
423 ctrl
|= WINBIND_DEBUG_STATE
;
426 if (iniparser_getboolean(d
, "global:cached_login", false)) {
427 ctrl
|= WINBIND_CACHED_LOGIN
;
430 if (iniparser_getboolean(d
, "global:krb5_auth", false)) {
431 ctrl
|= WINBIND_KRB5_AUTH
;
434 if (iniparser_getboolean(d
, "global:silent", false)) {
435 ctrl
|= WINBIND_SILENT
;
438 if (iniparser_getstr(d
, "global:krb5_ccache_type") != NULL
) {
439 ctrl
|= WINBIND_KRB5_CCACHE_TYPE
;
442 if ((iniparser_getstr(d
, "global:require-membership-of") != NULL
) ||
443 (iniparser_getstr(d
, "global:require_membership_of") != NULL
)) {
444 ctrl
|= WINBIND_REQUIRED_MEMBERSHIP
;
447 if (iniparser_getboolean(d
, "global:try_first_pass", false)) {
448 ctrl
|= WINBIND_TRY_FIRST_PASS_ARG
;
451 if (iniparser_getint(d
, "global:warn_pwd_expire", 0)) {
452 ctrl
|= WINBIND_WARN_PWD_EXPIRE
;
455 if (iniparser_getboolean(d
, "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_P(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
, &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
);
808 * send a password expiry message if required
810 * @param ctx PAM winbind context.
811 * @param next_change expected (calculated) next expiry date.
812 * @param already_expired pointer to a boolean to indicate if the password is
815 * @return boolean Returns true if message has been sent, false if not.
818 static bool _pam_send_password_expiry_message(struct pwb_context
*ctx
,
822 bool *already_expired
)
825 struct tm tm_now
, tm_next_change
;
827 if (already_expired
) {
828 *already_expired
= false;
831 if (next_change
<= now
) {
832 PAM_WB_REMARK_DIRECT(ctx
, "NT_STATUS_PASSWORD_EXPIRED");
833 if (already_expired
) {
834 *already_expired
= true;
839 if ((next_change
< 0) ||
840 (next_change
> now
+ warn_pwd_expire
* SECONDS_PER_DAY
)) {
844 if ((localtime_r(&now
, &tm_now
) == NULL
) ||
845 (localtime_r(&next_change
, &tm_next_change
) == NULL
)) {
849 days
= (tm_next_change
.tm_yday
+tm_next_change
.tm_year
*365) -
850 (tm_now
.tm_yday
+tm_now
.tm_year
*365);
853 _make_remark(ctx
, PAM_TEXT_INFO
,
854 _("Your password expires today"));
858 if (days
> 0 && days
< warn_pwd_expire
) {
859 _make_remark_format(ctx
, PAM_TEXT_INFO
,
860 _("Your password will expire in %d %s"),
861 days
, (days
> 1) ? _("days"):_("day"));
869 * Send a warning if the password expires in the near future
871 * @param ctx PAM winbind context.
872 * @param response The full authentication response structure.
873 * @param already_expired boolean, is the pwd already expired?
878 static void _pam_warn_password_expiry(struct pwb_context
*ctx
,
879 const struct wbcAuthUserInfo
*info
,
880 const struct wbcUserPasswordPolicyInfo
*policy
,
882 bool *already_expired
)
884 time_t now
= time(NULL
);
885 time_t next_change
= 0;
887 if (!info
|| !policy
) {
891 if (already_expired
) {
892 *already_expired
= false;
895 /* accounts with WBC_ACB_PWNOEXP set never receive a warning */
896 if (info
->acct_flags
& WBC_ACB_PWNOEXP
) {
900 /* no point in sending a warning if this is a grace logon */
901 if (PAM_WB_GRACE_LOGON(info
->user_flags
)) {
905 /* check if the info3 must change timestamp has been set */
906 next_change
= info
->pass_must_change_time
;
908 if (_pam_send_password_expiry_message(ctx
, next_change
, now
,
914 /* now check for the global password policy */
915 /* good catch from Ralf Haferkamp: an expiry of "never" is translated
917 if (policy
->expire
<= 0) {
921 next_change
= info
->pass_last_set_time
+ policy
->expire
;
923 if (_pam_send_password_expiry_message(ctx
, next_change
, now
,
929 /* no warning sent */
932 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
935 * Append a string, making sure not to overflow and to always return a
936 * NULL-terminated string.
938 * @param dest Destination string buffer (must already be NULL-terminated).
939 * @param src Source string buffer.
940 * @param dest_buffer_size Size of dest buffer in bytes.
942 * @return false if dest buffer is not big enough (no bytes copied), true on
946 static bool safe_append_string(char *dest
,
948 int dest_buffer_size
)
950 int dest_length
= strlen(dest
);
951 int src_length
= strlen(src
);
953 if (dest_length
+ src_length
+ 1 > dest_buffer_size
) {
957 memcpy(dest
+ dest_length
, src
, src_length
+ 1);
962 * Convert a names into a SID string, appending it to a buffer.
964 * @param ctx PAM winbind context.
965 * @param user User in PAM request.
966 * @param name Name to convert.
967 * @param sid_list_buffer Where to append the string sid.
968 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
970 * @return false on failure, true on success.
972 static bool winbind_name_to_sid_string(struct pwb_context
*ctx
,
975 char *sid_list_buffer
,
976 int sid_list_buffer_size
)
978 const char* sid_string
;
981 if (IS_SID_STRING(name
)) {
985 struct wbcDomainSid sid
;
986 enum wbcSidType type
;
989 _pam_log_debug(ctx
, LOG_DEBUG
,
990 "no sid given, looking up: %s\n", name
);
992 wbc_status
= wbcLookupName("", name
, &sid
, &type
);
993 if (!WBC_ERROR_IS_OK(wbc_status
)) {
994 _pam_log(ctx
, LOG_INFO
,
995 "could not lookup name: %s\n", name
);
999 wbc_status
= wbcSidToString(&sid
, &sid_str
);
1000 if (!WBC_ERROR_IS_OK(wbc_status
)) {
1004 wbcFreeMemory(sid_str
);
1005 sid_string
= sid_str
;
1008 if (!safe_append_string(sid_list_buffer
, sid_string
,
1009 sid_list_buffer_size
)) {
1017 * Convert a list of names into a list of sids.
1019 * @param ctx PAM winbind context.
1020 * @param user User in PAM request.
1021 * @param name_list List of names or string sids, separated by commas.
1022 * @param sid_list_buffer Where to put the list of string sids.
1023 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1025 * @return false on failure, true on success.
1027 static bool winbind_name_list_to_sid_string_list(struct pwb_context
*ctx
,
1029 const char *name_list
,
1030 char *sid_list_buffer
,
1031 int sid_list_buffer_size
)
1033 bool result
= false;
1034 char *current_name
= NULL
;
1035 const char *search_location
;
1038 if (sid_list_buffer_size
> 0) {
1039 sid_list_buffer
[0] = 0;
1042 search_location
= name_list
;
1043 while ((comma
= strstr(search_location
, ",")) != NULL
) {
1044 current_name
= strndup(search_location
,
1045 comma
- search_location
);
1046 if (NULL
== current_name
) {
1050 if (!winbind_name_to_sid_string(ctx
, user
,
1053 sid_list_buffer_size
)) {
1057 SAFE_FREE(current_name
);
1059 if (!safe_append_string(sid_list_buffer
, ",",
1060 sid_list_buffer_size
)) {
1064 search_location
= comma
+ 1;
1067 if (!winbind_name_to_sid_string(ctx
, user
, search_location
,
1069 sid_list_buffer_size
)) {
1076 SAFE_FREE(current_name
);
1081 * put krb5ccname variable into environment
1083 * @param ctx PAM winbind context.
1084 * @param krb5ccname env variable retrieved from winbindd.
1089 static void _pam_setup_krb5_env(struct pwb_context
*ctx
,
1090 struct wbcLogonUserInfo
*info
)
1095 const char *krb5ccname
= NULL
;
1097 if (off(ctx
->ctrl
, WINBIND_KRB5_AUTH
)) {
1105 for (i
=0; i
< info
->num_blobs
; i
++) {
1106 if (strcasecmp(info
->blobs
[i
].name
, "krb5ccname") == 0) {
1107 krb5ccname
= (const char *)info
->blobs
[i
].blob
.data
;
1112 if (!krb5ccname
|| (strlen(krb5ccname
) == 0)) {
1116 _pam_log_debug(ctx
, LOG_DEBUG
,
1117 "request returned KRB5CCNAME: %s", krb5ccname
);
1119 if (snprintf(var
, sizeof(var
), "KRB5CCNAME=%s", krb5ccname
) == -1) {
1123 ret
= pam_putenv(ctx
->pamh
, var
);
1125 _pam_log(ctx
, LOG_ERR
,
1126 "failed to set KRB5CCNAME to %s: %s",
1127 var
, pam_strerror(ctx
->pamh
, ret
));
1132 * Copy unix username if available (further processed in PAM).
1134 * @param ctx PAM winbind context
1135 * @param user_ret A pointer that holds a pointer to a string
1136 * @param unix_username A username
1141 static void _pam_setup_unix_username(struct pwb_context
*ctx
,
1143 struct wbcLogonUserInfo
*info
)
1145 const char *unix_username
= NULL
;
1148 if (!user_ret
|| !info
) {
1152 for (i
=0; i
< info
->num_blobs
; i
++) {
1153 if (strcasecmp(info
->blobs
[i
].name
, "unix_username") == 0) {
1154 unix_username
= (const char *)info
->blobs
[i
].blob
.data
;
1159 if (!unix_username
|| !unix_username
[0]) {
1163 *user_ret
= strdup(unix_username
);
1167 * Set string into the PAM stack.
1169 * @param ctx PAM winbind context.
1170 * @param data_name Key name for pam_set_data.
1171 * @param value String value.
1176 static void _pam_set_data_string(struct pwb_context
*ctx
,
1177 const char *data_name
,
1182 if (!data_name
|| !value
|| (strlen(data_name
) == 0) ||
1183 (strlen(value
) == 0)) {
1187 ret
= pam_set_data(ctx
->pamh
, data_name
, talloc_strdup(NULL
, value
),
1188 _pam_winbind_cleanup_func
);
1190 _pam_log_debug(ctx
, LOG_DEBUG
,
1191 "Could not set data %s: %s\n",
1192 data_name
, pam_strerror(ctx
->pamh
, ret
));
1197 * Set info3 strings into the PAM stack.
1199 * @param ctx PAM winbind context.
1200 * @param data_name Key name for pam_set_data.
1201 * @param value String value.
1206 static void _pam_set_data_info3(struct pwb_context
*ctx
,
1207 const struct wbcAuthUserInfo
*info
)
1209 _pam_set_data_string(ctx
, PAM_WINBIND_HOMEDIR
,
1210 info
->home_directory
);
1211 _pam_set_data_string(ctx
, PAM_WINBIND_LOGONSCRIPT
,
1212 info
->logon_script
);
1213 _pam_set_data_string(ctx
, PAM_WINBIND_LOGONSERVER
,
1214 info
->logon_server
);
1215 _pam_set_data_string(ctx
, PAM_WINBIND_PROFILEPATH
,
1216 info
->profile_path
);
1220 * Free info3 strings in the PAM stack.
1222 * @param pamh PAM handle
1227 static void _pam_free_data_info3(pam_handle_t
*pamh
)
1229 pam_set_data(pamh
, PAM_WINBIND_HOMEDIR
, NULL
, NULL
);
1230 pam_set_data(pamh
, PAM_WINBIND_LOGONSCRIPT
, NULL
, NULL
);
1231 pam_set_data(pamh
, PAM_WINBIND_LOGONSERVER
, NULL
, NULL
);
1232 pam_set_data(pamh
, PAM_WINBIND_PROFILEPATH
, NULL
, NULL
);
1236 * Send PAM_ERROR_MSG for cached or grace logons.
1238 * @param ctx PAM winbind context.
1239 * @param username User in PAM request.
1240 * @param info3_user_flgs Info3 flags containing logon type bits.
1245 static void _pam_warn_logon_type(struct pwb_context
*ctx
,
1246 const char *username
,
1247 uint32_t info3_user_flgs
)
1249 /* inform about logon type */
1250 if (PAM_WB_GRACE_LOGON(info3_user_flgs
)) {
1252 _make_remark(ctx
, PAM_ERROR_MSG
,
1254 "Please change your password as soon you're "
1256 _pam_log_debug(ctx
, LOG_DEBUG
,
1257 "User %s logged on using grace logon\n",
1260 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs
)) {
1262 _make_remark(ctx
, PAM_ERROR_MSG
,
1263 _("Domain Controller unreachable, "
1264 "using cached credentials instead. "
1265 "Network resources may be unavailable"));
1266 _pam_log_debug(ctx
, LOG_DEBUG
,
1267 "User %s logged on using cached credentials\n",
1273 * Send PAM_ERROR_MSG for krb5 errors.
1275 * @param ctx PAM winbind context.
1276 * @param username User in PAM request.
1277 * @param info3_user_flgs Info3 flags containing logon type bits.
1282 static void _pam_warn_krb5_failure(struct pwb_context
*ctx
,
1283 const char *username
,
1284 uint32_t info3_user_flgs
)
1286 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs
)) {
1287 _make_remark(ctx
, PAM_ERROR_MSG
,
1288 _("Failed to establish your Kerberos Ticket cache "
1289 "due time differences\n"
1290 "with the domain controller. "
1291 "Please verify the system time.\n"));
1292 _pam_log_debug(ctx
, LOG_DEBUG
,
1293 "User %s: Clock skew when getting Krb5 TGT\n",
1298 static bool _pam_check_remark_auth_err(struct pwb_context
*ctx
,
1299 const struct wbcAuthErrorInfo
*e
,
1300 const char *nt_status_string
,
1303 const char *ntstatus
= NULL
;
1304 const char *error_string
= NULL
;
1306 if (!e
|| !pam_error
) {
1310 ntstatus
= e
->nt_string
;
1315 if (strcasecmp(ntstatus
, nt_status_string
) == 0) {
1317 error_string
= _get_ntstatus_error_string(nt_status_string
);
1319 _make_remark(ctx
, PAM_ERROR_MSG
, error_string
);
1320 *pam_error
= e
->pam_error
;
1324 if (e
->display_string
) {
1325 _make_remark(ctx
, PAM_ERROR_MSG
, e
->display_string
);
1326 *pam_error
= e
->pam_error
;
1330 _make_remark(ctx
, PAM_ERROR_MSG
, nt_status_string
);
1331 *pam_error
= e
->pam_error
;
1340 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1342 * @param i The wbcUserPasswordPolicyInfo struct.
1344 * @return string (caller needs to talloc_free).
1347 static char *_pam_compose_pwd_restriction_string(struct pwb_context
*ctx
,
1348 struct wbcUserPasswordPolicyInfo
*i
)
1356 str
= talloc_asprintf(ctx
, _("Your password "));
1361 if (i
->min_length_password
> 0) {
1362 str
= talloc_asprintf_append(str
,
1363 _("must be at least %d characters; "),
1364 i
->min_length_password
);
1370 if (i
->password_history
> 0) {
1371 str
= talloc_asprintf_append(str
,
1372 _("cannot repeat any of your previous %d "
1374 i
->password_history
);
1380 if (i
->password_properties
& WBC_DOMAIN_PASSWORD_COMPLEX
) {
1381 str
= talloc_asprintf_append(str
,
1382 _("must contain capitals, numerals "
1384 "and cannot contain your account "
1391 str
= talloc_asprintf_append(str
,
1392 _("Please type a different password. "
1393 "Type a password which meets these requirements in "
1394 "both text boxes."));
1406 static int _pam_create_homedir(struct pwb_context
*ctx
,
1407 const char *dirname
,
1412 if (stat(dirname
, &sbuf
) == 0) {
1416 if (mkdir(dirname
, mode
) != 0) {
1418 _make_remark_format(ctx
, PAM_TEXT_INFO
,
1419 _("Creating directory: %s failed: %s"),
1420 dirname
, strerror(errno
));
1421 _pam_log(ctx
, LOG_ERR
, "could not create dir: %s (%s)",
1422 dirname
, strerror(errno
));
1423 return PAM_PERM_DENIED
;
1429 static int _pam_chown_homedir(struct pwb_context
*ctx
,
1430 const char *dirname
,
1434 if (chown(dirname
, uid
, gid
) != 0) {
1435 _pam_log(ctx
, LOG_ERR
, "failed to chown user homedir: %s (%s)",
1436 dirname
, strerror(errno
));
1437 return PAM_PERM_DENIED
;
1443 static int _pam_mkhomedir(struct pwb_context
*ctx
)
1445 struct passwd
*pwd
= NULL
;
1447 char *create_dir
= NULL
;
1448 char *user_dir
= NULL
;
1450 const char *username
;
1452 char *safe_ptr
= NULL
;
1455 /* Get the username */
1456 ret
= pam_get_user(ctx
->pamh
, &username
, NULL
);
1457 if ((ret
!= PAM_SUCCESS
) || (!username
)) {
1458 _pam_log_debug(ctx
, LOG_DEBUG
, "can not get the username");
1459 return PAM_SERVICE_ERR
;
1462 pwd
= getpwnam(username
);
1464 _pam_log_debug(ctx
, LOG_DEBUG
, "can not get the username");
1465 return PAM_USER_UNKNOWN
;
1467 _pam_log_debug(ctx
, LOG_DEBUG
, "homedir is: %s", pwd
->pw_dir
);
1469 ret
= _pam_create_homedir(ctx
, pwd
->pw_dir
, 0700);
1470 if (ret
== PAM_SUCCESS
) {
1471 ret
= _pam_chown_homedir(ctx
, pwd
->pw_dir
,
1476 if (ret
== PAM_SUCCESS
) {
1480 /* maybe we need to create parent dirs */
1481 create_dir
= talloc_strdup(ctx
, "/");
1486 /* find final directory */
1487 user_dir
= strrchr(pwd
->pw_dir
, '/');
1493 _pam_log(ctx
, LOG_DEBUG
, "final directory: %s", user_dir
);
1497 while ((token
= strtok_r(p
, "/", &safe_ptr
)) != NULL
) {
1503 _pam_log_debug(ctx
, LOG_DEBUG
, "token is %s", token
);
1505 create_dir
= talloc_asprintf_append(create_dir
, "%s/", token
);
1509 _pam_log_debug(ctx
, LOG_DEBUG
, "current_dir is %s", create_dir
);
1511 if (strcmp(token
, user_dir
) == 0) {
1512 _pam_log_debug(ctx
, LOG_DEBUG
, "assuming last directory: %s", token
);
1516 ret
= _pam_create_homedir(ctx
, create_dir
, mode
);
1522 return _pam_chown_homedir(ctx
, create_dir
,
1527 /* talk to winbindd */
1528 static int winbind_auth_request(struct pwb_context
*ctx
,
1533 const int warn_pwd_expire
,
1534 struct wbcAuthErrorInfo
**p_error
,
1535 struct wbcLogonUserInfo
**p_info
,
1536 struct wbcUserPasswordPolicyInfo
**p_policy
,
1537 time_t *pwd_last_set
,
1542 struct wbcLogonUserParams logon
;
1543 char membership_of
[1024];
1544 uid_t user_uid
= -1;
1545 uint32_t flags
= WBFLAG_PAM_INFO3_TEXT
|
1546 WBFLAG_PAM_GET_PWD_POLICY
;
1548 struct wbcLogonUserInfo
*info
= NULL
;
1549 struct wbcAuthUserInfo
*user_info
= NULL
;
1550 struct wbcAuthErrorInfo
*error
= NULL
;
1551 struct wbcUserPasswordPolicyInfo
*policy
= NULL
;
1553 int ret
= PAM_AUTH_ERR
;
1555 const char *codes
[] = {
1556 "NT_STATUS_PASSWORD_EXPIRED",
1557 "NT_STATUS_PASSWORD_MUST_CHANGE",
1558 "NT_STATUS_INVALID_WORKSTATION",
1559 "NT_STATUS_INVALID_LOGON_HOURS",
1560 "NT_STATUS_ACCOUNT_EXPIRED",
1561 "NT_STATUS_ACCOUNT_DISABLED",
1562 "NT_STATUS_ACCOUNT_LOCKED_OUT",
1563 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1564 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1565 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1566 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1567 "NT_STATUS_NO_LOGON_SERVERS",
1568 "NT_STATUS_WRONG_PASSWORD",
1569 "NT_STATUS_ACCESS_DENIED"
1576 /* Krb5 auth always has to go against the KDC of the user's realm */
1578 if (ctx
->ctrl
& WINBIND_KRB5_AUTH
) {
1579 flags
|= WBFLAG_PAM_CONTACT_TRUSTDOM
;
1582 if (ctx
->ctrl
& (WINBIND_KRB5_AUTH
|WINBIND_CACHED_LOGIN
)) {
1583 struct passwd
*pwd
= NULL
;
1585 pwd
= getpwnam(user
);
1587 return PAM_USER_UNKNOWN
;
1589 user_uid
= pwd
->pw_uid
;
1592 if (ctx
->ctrl
& WINBIND_KRB5_AUTH
) {
1594 _pam_log_debug(ctx
, LOG_DEBUG
,
1595 "enabling krb5 login flag\n");
1597 flags
|= WBFLAG_PAM_KRB5
|
1598 WBFLAG_PAM_FALLBACK_AFTER_KRB5
;
1601 if (ctx
->ctrl
& WINBIND_CACHED_LOGIN
) {
1602 _pam_log_debug(ctx
, LOG_DEBUG
,
1603 "enabling cached login flag\n");
1604 flags
|= WBFLAG_PAM_CACHED_LOGIN
;
1609 flags
|= WBFLAG_PAM_UNIX_NAME
;
1612 if (cctype
!= NULL
) {
1613 _pam_log_debug(ctx
, LOG_DEBUG
,
1614 "enabling request for a %s krb5 ccache\n",
1618 if (member
!= NULL
) {
1620 ZERO_STRUCT(membership_of
);
1622 if (!winbind_name_list_to_sid_string_list(ctx
, user
, member
,
1624 sizeof(membership_of
))) {
1625 _pam_log_debug(ctx
, LOG_ERR
,
1626 "failed to serialize membership of sid "
1627 "\"%s\"\n", member
);
1628 return PAM_AUTH_ERR
;
1634 logon
.username
= user
;
1635 logon
.password
= pass
;
1637 wbc_status
= wbcAddNamedBlob(&logon
.num_blobs
,
1643 if (!WBC_ERROR_IS_OK(wbc_status
)) {
1647 wbc_status
= wbcAddNamedBlob(&logon
.num_blobs
,
1653 if (!WBC_ERROR_IS_OK(wbc_status
)) {
1657 wbc_status
= wbcAddNamedBlob(&logon
.num_blobs
,
1661 (uint8_t *)&user_uid
,
1663 if (!WBC_ERROR_IS_OK(wbc_status
)) {
1667 wbc_status
= wbcAddNamedBlob(&logon
.num_blobs
,
1671 (uint8_t *)membership_of
,
1672 sizeof(membership_of
));
1673 if (!WBC_ERROR_IS_OK(wbc_status
)) {
1677 wbc_status
= wbcLogonUser(&logon
, &info
, &error
, &policy
);
1678 ret
= wbc_auth_error_to_pam_error(ctx
, error
, wbc_status
,
1679 user
, "wbcLogonUser");
1680 wbcFreeMemory(logon
.blobs
);
1683 if (info
&& info
->info
) {
1684 user_info
= info
->info
;
1687 if (pwd_last_set
&& user_info
) {
1688 *pwd_last_set
= user_info
->pass_last_set_time
;
1691 if (p_info
&& info
) {
1695 if (p_policy
&& policy
) {
1699 if (p_error
&& error
) {
1700 /* We want to process the error in the caller. */
1705 for (i
=0; i
<ARRAY_SIZE(codes
); i
++) {
1707 if (_pam_check_remark_auth_err(ctx
, error
, codes
[i
], &_ret
)) {
1713 if ((ret
== PAM_SUCCESS
) && user_info
&& policy
&& info
) {
1715 bool already_expired
= false;
1717 /* warn a user if the password is about to expire soon */
1718 _pam_warn_password_expiry(ctx
, user_info
, policy
,
1722 if (already_expired
== true) {
1724 SMB_TIME_T last_set
= user_info
->pass_last_set_time
;
1726 _pam_log_debug(ctx
, LOG_DEBUG
,
1727 "Password has expired "
1728 "(Password was last set: %lld, "
1729 "the policy says it should expire here "
1730 "%lld (now it's: %lu))\n",
1731 (long long int)last_set
,
1732 (long long int)last_set
+
1736 return PAM_AUTHTOK_EXPIRED
;
1739 /* inform about logon type */
1740 _pam_warn_logon_type(ctx
, user
, user_info
->user_flags
);
1742 /* inform about krb5 failures */
1743 _pam_warn_krb5_failure(ctx
, user
, user_info
->user_flags
);
1745 /* set some info3 info for other modules in the stack */
1746 _pam_set_data_info3(ctx
, user_info
);
1748 /* put krb5ccname into env */
1749 _pam_setup_krb5_env(ctx
, info
);
1751 /* If winbindd returned a username, return the pointer to it
1753 _pam_setup_unix_username(ctx
, user_ret
, info
);
1758 wbcFreeMemory(logon
.blobs
);
1760 if (info
&& info
->blobs
) {
1761 wbcFreeMemory(info
->blobs
);
1763 if (error
&& !p_error
) {
1764 wbcFreeMemory(error
);
1766 if (info
&& !p_info
) {
1767 wbcFreeMemory(info
);
1769 if (policy
&& !p_policy
) {
1770 wbcFreeMemory(policy
);
1776 /* talk to winbindd */
1777 static int winbind_chauthtok_request(struct pwb_context
*ctx
,
1779 const char *oldpass
,
1780 const char *newpass
,
1781 time_t pwd_last_set
)
1784 struct wbcChangePasswordParams params
;
1785 struct wbcAuthErrorInfo
*error
= NULL
;
1786 struct wbcUserPasswordPolicyInfo
*policy
= NULL
;
1787 enum wbcPasswordChangeRejectReason reject_reason
= -1;
1791 const char *codes
[] = {
1792 "NT_STATUS_BACKUP_CONTROLLER",
1793 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1794 "NT_STATUS_NO_LOGON_SERVERS",
1795 "NT_STATUS_ACCESS_DENIED",
1796 "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1797 "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1798 "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1800 int ret
= PAM_AUTH_ERR
;
1802 ZERO_STRUCT(params
);
1804 if (ctx
->ctrl
& WINBIND_KRB5_AUTH
) {
1805 flags
|= WBFLAG_PAM_KRB5
|
1806 WBFLAG_PAM_CONTACT_TRUSTDOM
;
1809 if (ctx
->ctrl
& WINBIND_CACHED_LOGIN
) {
1810 flags
|= WBFLAG_PAM_CACHED_LOGIN
;
1813 params
.account_name
= user
;
1814 params
.level
= WBC_AUTH_USER_LEVEL_PLAIN
;
1815 params
.old_password
.plaintext
= oldpass
;
1816 params
.new_password
.plaintext
= newpass
;
1817 params
.flags
= flags
;
1819 wbc_status
= wbcChangeUserPasswordEx(¶ms
, &error
, &reject_reason
, &policy
);
1820 ret
= wbc_auth_error_to_pam_error(ctx
, error
, wbc_status
,
1821 user
, "wbcChangeUserPasswordEx");
1823 if (WBC_ERROR_IS_OK(wbc_status
)) {
1824 _pam_log(ctx
, LOG_NOTICE
,
1825 "user '%s' password changed", user
);
1830 wbcFreeMemory(policy
);
1834 for (i
=0; i
<ARRAY_SIZE(codes
); i
++) {
1836 if (_pam_check_remark_auth_err(ctx
, error
, codes
[i
], &_ret
)) {
1842 if (!strcasecmp(error
->nt_string
,
1843 "NT_STATUS_PASSWORD_RESTRICTION")) {
1845 char *pwd_restriction_string
= NULL
;
1846 SMB_TIME_T min_pwd_age
= 0;
1849 min_pwd_age
= policy
->min_passwordage
;
1852 /* FIXME: avoid to send multiple PAM messages after another */
1853 switch (reject_reason
) {
1856 case WBC_PWD_CHANGE_REJECT_OTHER
:
1857 if ((min_pwd_age
> 0) &&
1858 (pwd_last_set
+ min_pwd_age
> time(NULL
))) {
1859 PAM_WB_REMARK_DIRECT(ctx
,
1860 "NT_STATUS_PWD_TOO_RECENT");
1863 case WBC_PWD_CHANGE_REJECT_TOO_SHORT
:
1864 PAM_WB_REMARK_DIRECT(ctx
,
1865 "NT_STATUS_PWD_TOO_SHORT");
1867 case WBC_PWD_CHANGE_REJECT_IN_HISTORY
:
1868 PAM_WB_REMARK_DIRECT(ctx
,
1869 "NT_STATUS_PWD_HISTORY_CONFLICT");
1871 case WBC_PWD_CHANGE_REJECT_COMPLEXITY
:
1872 _make_remark(ctx
, PAM_ERROR_MSG
,
1873 _("Password does not meet "
1874 "complexity requirements"));
1877 _pam_log_debug(ctx
, LOG_DEBUG
,
1878 "unknown password change "
1879 "reject reason: %d",
1884 pwd_restriction_string
=
1885 _pam_compose_pwd_restriction_string(ctx
, policy
);
1886 if (pwd_restriction_string
) {
1887 _make_remark(ctx
, PAM_ERROR_MSG
,
1888 pwd_restriction_string
);
1889 TALLOC_FREE(pwd_restriction_string
);
1893 wbcFreeMemory(error
);
1894 wbcFreeMemory(policy
);
1900 * Checks if a user has an account
1903 * 1 = User not found
1907 static int valid_user(struct pwb_context
*ctx
,
1910 /* check not only if the user is available over NSS calls, also make
1911 * sure it's really a winbind user, this is important when stacking PAM
1912 * modules in the 'account' or 'password' facility. */
1915 struct passwd
*pwd
= NULL
;
1916 struct passwd
*wb_pwd
= NULL
;
1918 pwd
= getpwnam(user
);
1923 wbc_status
= wbcGetpwnam(user
, &wb_pwd
);
1924 wbcFreeMemory(wb_pwd
);
1925 if (!WBC_ERROR_IS_OK(wbc_status
)) {
1926 _pam_log(ctx
, LOG_DEBUG
, "valid_user: wbcGetpwnam gave %s\n",
1927 wbcErrorString(wbc_status
));
1930 switch (wbc_status
) {
1931 case WBC_ERR_UNKNOWN_USER
:
1933 case WBC_ERR_SUCCESS
:
1941 static char *_pam_delete(register char *xx
)
1949 * obtain a password from the user
1952 static int _winbind_read_password(struct pwb_context
*ctx
,
1954 const char *comment
,
1955 const char *prompt1
,
1956 const char *prompt2
,
1964 _pam_log(ctx
, LOG_DEBUG
, "getting password (0x%08x)", ctrl
);
1967 * make sure nothing inappropriate gets returned
1970 *pass
= token
= NULL
;
1973 * which authentication token are we getting?
1976 if (on(WINBIND__OLD_PASSWORD
, ctrl
)) {
1977 authtok_flag
= PAM_OLDAUTHTOK
;
1979 authtok_flag
= PAM_AUTHTOK
;
1983 * should we obtain the password from a PAM item ?
1986 if (on(WINBIND_TRY_FIRST_PASS_ARG
, ctrl
) ||
1987 on(WINBIND_USE_FIRST_PASS_ARG
, ctrl
)) {
1988 retval
= _pam_get_item(ctx
->pamh
, authtok_flag
, &item
);
1989 if (retval
!= PAM_SUCCESS
) {
1991 _pam_log(ctx
, LOG_ALERT
,
1992 "pam_get_item returned error "
1993 "to unix-read-password");
1995 } else if (item
!= NULL
) { /* we have a password! */
1998 _pam_log(ctx
, LOG_DEBUG
,
1999 "pam_get_item returned a password");
2001 } else if (on(WINBIND_USE_FIRST_PASS_ARG
, ctrl
)) {
2002 return PAM_AUTHTOK_RECOVER_ERR
; /* didn't work */
2003 } else if (on(WINBIND_USE_AUTHTOK_ARG
, ctrl
)
2004 && off(WINBIND__OLD_PASSWORD
, ctrl
)) {
2005 return PAM_AUTHTOK_RECOVER_ERR
;
2009 * getting here implies we will have to get the password from the
2014 struct pam_message msg
[3], *pmsg
[3];
2015 struct pam_response
*resp
;
2018 /* prepare to converse */
2020 if (comment
!= NULL
&& off(ctrl
, WINBIND_SILENT
)) {
2022 msg
[0].msg_style
= PAM_TEXT_INFO
;
2023 msg
[0].msg
= discard_const_p(char, comment
);
2030 msg
[i
].msg_style
= PAM_PROMPT_ECHO_OFF
;
2031 msg
[i
++].msg
= discard_const_p(char, prompt1
);
2034 if (prompt2
!= NULL
) {
2036 msg
[i
].msg_style
= PAM_PROMPT_ECHO_OFF
;
2037 msg
[i
++].msg
= discard_const_p(char, prompt2
);
2040 /* so call the conversation expecting i responses */
2042 retval
= converse(ctx
->pamh
, i
, pmsg
, &resp
);
2044 if (retval
== PAM_SUCCESS
) {
2045 retval
= PAM_AUTHTOK_RECOVER_ERR
;
2049 if (retval
!= PAM_SUCCESS
) {
2050 _pam_drop_reply(resp
, i
);
2054 /* interpret the response */
2056 token
= x_strdup(resp
[i
- replies
].resp
);
2058 _pam_log(ctx
, LOG_NOTICE
,
2059 "could not recover "
2060 "authentication token");
2061 retval
= PAM_AUTHTOK_RECOVER_ERR
;
2066 /* verify that password entered correctly */
2067 if (!resp
[i
- 1].resp
||
2068 strcmp(token
, resp
[i
- 1].resp
)) {
2069 _pam_delete(token
); /* mistyped */
2070 retval
= PAM_AUTHTOK_RECOVER_ERR
;
2071 _make_remark(ctx
, PAM_ERROR_MSG
,
2077 * tidy up the conversation (resp_retcode) is ignored
2078 * -- what is it for anyway? AGM
2080 _pam_drop_reply(resp
, i
);
2084 if (retval
!= PAM_SUCCESS
) {
2085 _pam_log_debug(ctx
, LOG_DEBUG
,
2086 "unable to obtain a password");
2089 /* 'token' is the entered password */
2091 /* we store this password as an item */
2093 retval
= pam_set_item(ctx
->pamh
, authtok_flag
, token
);
2094 _pam_delete(token
); /* clean it up */
2095 if (retval
!= PAM_SUCCESS
||
2096 (retval
= _pam_get_item(ctx
->pamh
, authtok_flag
, &item
)) != PAM_SUCCESS
) {
2098 _pam_log(ctx
, LOG_CRIT
, "error manipulating password");
2104 item
= NULL
; /* break link to password */
2109 static const char *get_conf_item_string(struct pwb_context
*ctx
,
2114 const char *parm_opt
= NULL
;
2116 if (!(ctx
->ctrl
& config_flag
)) {
2120 /* let the pam opt take precedence over the pam_winbind.conf option */
2121 for (i
=0; i
<ctx
->argc
; i
++) {
2123 if ((strncmp(ctx
->argv
[i
], item
, strlen(item
)) == 0)) {
2126 if ((p
= strchr(ctx
->argv
[i
], '=')) == NULL
) {
2127 _pam_log(ctx
, LOG_INFO
,
2128 "no \"=\" delimiter for \"%s\" found\n",
2132 _pam_log_debug(ctx
, LOG_INFO
,
2133 "PAM config: %s '%s'\n", item
, p
+1);
2141 key
= talloc_asprintf(ctx
, "global:%s", item
);
2146 parm_opt
= iniparser_getstr(ctx
->dict
, key
);
2149 _pam_log_debug(ctx
, LOG_INFO
, "CONFIG file: %s '%s'\n",
2156 static int get_config_item_int(struct pwb_context
*ctx
,
2160 int i
, parm_opt
= -1;
2162 if (!(ctx
->ctrl
& config_flag
)) {
2166 /* let the pam opt take precedence over the pam_winbind.conf option */
2167 for (i
= 0; i
< ctx
->argc
; i
++) {
2169 if ((strncmp(ctx
->argv
[i
], item
, strlen(item
)) == 0)) {
2172 if ((p
= strchr(ctx
->argv
[i
], '=')) == NULL
) {
2173 _pam_log(ctx
, LOG_INFO
,
2174 "no \"=\" delimiter for \"%s\" found\n",
2178 parm_opt
= atoi(p
+ 1);
2179 _pam_log_debug(ctx
, LOG_INFO
,
2180 "PAM config: %s '%d'\n",
2189 key
= talloc_asprintf(ctx
, "global:%s", item
);
2194 parm_opt
= iniparser_getint(ctx
->dict
, key
, -1);
2197 _pam_log_debug(ctx
, LOG_INFO
,
2198 "CONFIG file: %s '%d'\n",
2205 static const char *get_krb5_cc_type_from_config(struct pwb_context
*ctx
)
2207 return get_conf_item_string(ctx
, "krb5_ccache_type",
2208 WINBIND_KRB5_CCACHE_TYPE
);
2211 static const char *get_member_from_config(struct pwb_context
*ctx
)
2213 const char *ret
= NULL
;
2214 ret
= get_conf_item_string(ctx
, "require_membership_of",
2215 WINBIND_REQUIRED_MEMBERSHIP
);
2219 return get_conf_item_string(ctx
, "require-membership-of",
2220 WINBIND_REQUIRED_MEMBERSHIP
);
2223 static int get_warn_pwd_expire_from_config(struct pwb_context
*ctx
)
2226 ret
= get_config_item_int(ctx
, "warn_pwd_expire",
2227 WINBIND_WARN_PWD_EXPIRE
);
2228 /* no or broken setting */
2230 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES
;
2236 * Retrieve the winbind separator.
2238 * @param ctx PAM winbind context.
2240 * @return string separator character. NULL on failure.
2243 static char winbind_get_separator(struct pwb_context
*ctx
)
2246 static struct wbcInterfaceDetails
*details
= NULL
;
2248 wbc_status
= wbcInterfaceDetails(&details
);
2249 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2250 _pam_log(ctx
, LOG_ERR
,
2251 "Could not retrieve winbind interface details: %s",
2252 wbcErrorString(wbc_status
));
2260 return details
->winbind_separator
;
2265 * Convert a upn to a name.
2267 * @param ctx PAM winbind context.
2268 * @param upn USer UPN to be trabslated.
2270 * @return converted name. NULL pointer on failure. Caller needs to free.
2273 static char* winbind_upn_to_username(struct pwb_context
*ctx
,
2277 wbcErr wbc_status
= WBC_ERR_UNKNOWN_FAILURE
;
2278 struct wbcDomainSid sid
;
2279 enum wbcSidType type
;
2283 /* This cannot work when the winbind separator = @ */
2285 sep
= winbind_get_separator(ctx
);
2286 if (!sep
|| sep
== '@') {
2290 /* Convert the UPN to a SID */
2292 wbc_status
= wbcLookupName("", upn
, &sid
, &type
);
2293 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2297 /* Convert the the SID back to the sAMAccountName */
2299 wbc_status
= wbcLookupSid(&sid
, &domain
, &name
, &type
);
2300 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2304 return talloc_asprintf(ctx
, "%s\\%s", domain
, name
);
2307 static int _pam_delete_cred(pam_handle_t
*pamh
, int flags
,
2308 int argc
, const char **argv
)
2310 int retval
= PAM_SUCCESS
;
2311 struct pwb_context
*ctx
= NULL
;
2312 struct wbcLogoffUserParams logoff
;
2313 struct wbcAuthErrorInfo
*error
= NULL
;
2317 retval
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2322 _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx
);
2324 if (ctx
->ctrl
& WINBIND_KRB5_AUTH
) {
2326 /* destroy the ccache here */
2328 uint32_t wbc_flags
= 0;
2329 const char *ccname
= NULL
;
2330 struct passwd
*pwd
= NULL
;
2332 retval
= pam_get_user(pamh
, &user
, _("Username: "));
2334 _pam_log(ctx
, LOG_ERR
,
2335 "could not identify user");
2340 _pam_log(ctx
, LOG_ERR
,
2341 "username was NULL!");
2342 retval
= PAM_USER_UNKNOWN
;
2346 _pam_log_debug(ctx
, LOG_DEBUG
,
2347 "username [%s] obtained", user
);
2349 ccname
= pam_getenv(pamh
, "KRB5CCNAME");
2350 if (ccname
== NULL
) {
2351 _pam_log_debug(ctx
, LOG_DEBUG
,
2352 "user has no KRB5CCNAME environment");
2355 pwd
= getpwnam(user
);
2357 retval
= PAM_USER_UNKNOWN
;
2361 wbc_flags
= WBFLAG_PAM_KRB5
|
2362 WBFLAG_PAM_CONTACT_TRUSTDOM
;
2364 ZERO_STRUCT(logoff
);
2366 logoff
.username
= user
;
2368 wbc_status
= wbcAddNamedBlob(&logoff
.num_blobs
,
2374 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2378 wbc_status
= wbcAddNamedBlob(&logoff
.num_blobs
,
2382 (uint8_t *)&wbc_flags
,
2384 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2388 wbc_status
= wbcAddNamedBlob(&logoff
.num_blobs
,
2392 (uint8_t *)&pwd
->pw_uid
,
2393 sizeof(pwd
->pw_uid
));
2394 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2398 wbc_status
= wbcLogoffUserEx(&logoff
, &error
);
2399 retval
= wbc_auth_error_to_pam_error(ctx
, error
, wbc_status
,
2400 user
, "wbcLogoffUser");
2401 wbcFreeMemory(error
);
2402 wbcFreeMemory(logoff
.blobs
);
2404 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2405 _pam_log(ctx
, LOG_INFO
,
2406 "failed to logoff user %s: %s\n",
2407 user
, wbcErrorString(wbc_status
));
2413 wbcFreeMemory(logoff
.blobs
);
2416 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2417 retval
= wbc_auth_error_to_pam_error(ctx
, error
, wbc_status
,
2418 user
, "wbcLogoffUser");
2422 * Delete the krb5 ccname variable from the PAM environment
2423 * if it was set by winbind.
2425 if (ctx
->ctrl
& WINBIND_KRB5_AUTH
) {
2426 pam_putenv(pamh
, "KRB5CCNAME");
2429 _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx
, retval
);
2437 int pam_sm_authenticate(pam_handle_t
*pamh
, int flags
,
2438 int argc
, const char **argv
)
2440 const char *username
;
2441 const char *password
;
2442 const char *member
= NULL
;
2443 const char *cctype
= NULL
;
2444 int warn_pwd_expire
;
2445 int retval
= PAM_AUTH_ERR
;
2446 char *username_ret
= NULL
;
2447 char *new_authtok_required
= NULL
;
2448 char *real_username
= NULL
;
2449 struct pwb_context
*ctx
= NULL
;
2451 retval
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2456 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx
);
2458 /* Get the username */
2459 retval
= pam_get_user(pamh
, &username
, NULL
);
2460 if ((retval
!= PAM_SUCCESS
) || (!username
)) {
2461 _pam_log_debug(ctx
, LOG_DEBUG
,
2462 "can not get the username");
2463 retval
= PAM_SERVICE_ERR
;
2469 /* Decode the user name since AIX does not support logn user
2470 names by default. The name is encoded as _#uid. */
2472 if (username
[0] == '_') {
2473 uid_t id
= atoi(&username
[1]);
2474 struct passwd
*pw
= NULL
;
2476 if ((id
!=0) && ((pw
= getpwuid(id
)) != NULL
)) {
2477 real_username
= strdup(pw
->pw_name
);
2482 if (!real_username
) {
2483 /* Just making a copy of the username we got from PAM */
2484 if ((real_username
= strdup(username
)) == NULL
) {
2485 _pam_log_debug(ctx
, LOG_DEBUG
,
2486 "memory allocation failure when copying "
2488 retval
= PAM_SERVICE_ERR
;
2493 /* Maybe this was a UPN */
2495 if (strchr(real_username
, '@') != NULL
) {
2496 char *samaccountname
= NULL
;
2498 samaccountname
= winbind_upn_to_username(ctx
,
2500 if (samaccountname
) {
2501 free(real_username
);
2502 real_username
= strdup(samaccountname
);
2506 retval
= _winbind_read_password(ctx
, ctx
->ctrl
, NULL
,
2507 _("Password: "), NULL
,
2510 if (retval
!= PAM_SUCCESS
) {
2511 _pam_log(ctx
, LOG_ERR
,
2512 "Could not retrieve user's password");
2513 retval
= PAM_AUTHTOK_ERR
;
2517 /* Let's not give too much away in the log file */
2519 #ifdef DEBUG_PASSWORD
2520 _pam_log_debug(ctx
, LOG_INFO
,
2521 "Verify user '%s' with password '%s'",
2522 real_username
, password
);
2524 _pam_log_debug(ctx
, LOG_INFO
,
2525 "Verify user '%s'", real_username
);
2528 member
= get_member_from_config(ctx
);
2529 cctype
= get_krb5_cc_type_from_config(ctx
);
2530 warn_pwd_expire
= get_warn_pwd_expire_from_config(ctx
);
2532 /* Now use the username to look up password */
2533 retval
= winbind_auth_request(ctx
, real_username
, password
,
2534 member
, cctype
, warn_pwd_expire
,
2536 NULL
, &username_ret
);
2538 if (retval
== PAM_NEW_AUTHTOK_REQD
||
2539 retval
== PAM_AUTHTOK_EXPIRED
) {
2541 char *new_authtok_required_during_auth
= NULL
;
2543 new_authtok_required
= talloc_asprintf(NULL
, "%d", retval
);
2544 if (!new_authtok_required
) {
2545 retval
= PAM_BUF_ERR
;
2549 pam_set_data(pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD
,
2550 new_authtok_required
,
2551 _pam_winbind_cleanup_func
);
2553 retval
= PAM_SUCCESS
;
2555 new_authtok_required_during_auth
= talloc_asprintf(NULL
, "%d", true);
2556 if (!new_authtok_required_during_auth
) {
2557 retval
= PAM_BUF_ERR
;
2561 pam_set_data(pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH
,
2562 new_authtok_required_during_auth
,
2563 _pam_winbind_cleanup_func
);
2570 pam_set_item (pamh
, PAM_USER
, username_ret
);
2571 _pam_log_debug(ctx
, LOG_INFO
,
2572 "Returned user was '%s'", username_ret
);
2576 if (real_username
) {
2577 free(real_username
);
2580 if (!new_authtok_required
) {
2581 pam_set_data(pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD
, NULL
, NULL
);
2584 if (retval
!= PAM_SUCCESS
) {
2585 _pam_free_data_info3(pamh
);
2588 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx
, retval
);
2596 int pam_sm_setcred(pam_handle_t
*pamh
, int flags
,
2597 int argc
, const char **argv
)
2599 int ret
= PAM_SYSTEM_ERR
;
2600 struct pwb_context
*ctx
= NULL
;
2602 ret
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2607 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx
);
2609 switch (flags
& ~PAM_SILENT
) {
2611 case PAM_DELETE_CRED
:
2612 ret
= _pam_delete_cred(pamh
, flags
, argc
, argv
);
2614 case PAM_REFRESH_CRED
:
2615 _pam_log_debug(ctx
, LOG_WARNING
,
2616 "PAM_REFRESH_CRED not implemented");
2619 case PAM_REINITIALIZE_CRED
:
2620 _pam_log_debug(ctx
, LOG_WARNING
,
2621 "PAM_REINITIALIZE_CRED not implemented");
2624 case PAM_ESTABLISH_CRED
:
2625 _pam_log_debug(ctx
, LOG_WARNING
,
2626 "PAM_ESTABLISH_CRED not implemented");
2630 ret
= PAM_SYSTEM_ERR
;
2636 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx
, ret
);
2644 * Account management. We want to verify that the account exists
2645 * before returning PAM_SUCCESS
2648 int pam_sm_acct_mgmt(pam_handle_t
*pamh
, int flags
,
2649 int argc
, const char **argv
)
2651 const char *username
;
2652 int ret
= PAM_USER_UNKNOWN
;
2654 struct pwb_context
*ctx
= NULL
;
2656 ret
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2661 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx
);
2664 /* Get the username */
2665 ret
= pam_get_user(pamh
, &username
, NULL
);
2666 if ((ret
!= PAM_SUCCESS
) || (!username
)) {
2667 _pam_log_debug(ctx
, LOG_DEBUG
,
2668 "can not get the username");
2669 ret
= PAM_SERVICE_ERR
;
2673 /* Verify the username */
2674 ret
= valid_user(ctx
, username
);
2677 /* some sort of system error. The log was already printed */
2678 ret
= PAM_SERVICE_ERR
;
2681 /* the user does not exist */
2682 _pam_log_debug(ctx
, LOG_NOTICE
, "user '%s' not found",
2684 if (ctx
->ctrl
& WINBIND_UNKNOWN_OK_ARG
) {
2688 ret
= PAM_USER_UNKNOWN
;
2691 pam_get_data(pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD
,
2692 (const void **)&tmp
);
2694 ret
= atoi((const char *)tmp
);
2696 case PAM_AUTHTOK_EXPIRED
:
2697 /* fall through, since new token is required in this case */
2698 case PAM_NEW_AUTHTOK_REQD
:
2699 _pam_log(ctx
, LOG_WARNING
,
2700 "pam_sm_acct_mgmt success but %s is set",
2701 PAM_WINBIND_NEW_AUTHTOK_REQD
);
2702 _pam_log(ctx
, LOG_NOTICE
,
2703 "user '%s' needs new password",
2705 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2706 ret
= PAM_NEW_AUTHTOK_REQD
;
2709 _pam_log(ctx
, LOG_WARNING
,
2710 "pam_sm_acct_mgmt success");
2711 _pam_log(ctx
, LOG_NOTICE
,
2712 "user '%s' granted access", username
);
2718 /* Otherwise, the authentication looked good */
2719 _pam_log(ctx
, LOG_NOTICE
,
2720 "user '%s' granted access", username
);
2724 /* we don't know anything about this return value */
2725 _pam_log(ctx
, LOG_ERR
,
2726 "internal module error (ret = %d, user = '%s')",
2728 ret
= PAM_SERVICE_ERR
;
2732 /* should not be reached */
2737 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx
, ret
);
2745 int pam_sm_open_session(pam_handle_t
*pamh
, int flags
,
2746 int argc
, const char **argv
)
2748 int ret
= PAM_SUCCESS
;
2749 struct pwb_context
*ctx
= NULL
;
2751 ret
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2756 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx
);
2758 if (ctx
->ctrl
& WINBIND_MKHOMEDIR
) {
2759 /* check and create homedir */
2760 ret
= _pam_mkhomedir(ctx
);
2763 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx
, ret
);
2771 int pam_sm_close_session(pam_handle_t
*pamh
, int flags
,
2772 int argc
, const char **argv
)
2774 int ret
= PAM_SUCCESS
;
2775 struct pwb_context
*ctx
= NULL
;
2777 ret
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2782 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx
);
2785 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx
, ret
);
2793 * evaluate whether we need to re-authenticate with kerberos after a
2796 * @param ctx PAM winbind context.
2797 * @param user The username
2799 * @return boolean Returns true if required, false if not.
2802 static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context
*ctx
,
2806 /* Make sure that we only do this if a) the chauthtok got initiated
2807 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2808 * later password change via the "passwd" command if done by the user
2810 * NB. If we login from gdm or xdm and the password expires,
2811 * we change the password, but there is no memory cache.
2812 * Thus, even for passthrough login, we should do the
2813 * authentication again to update memory cache.
2817 char *new_authtok_reqd_during_auth
= NULL
;
2818 struct passwd
*pwd
= NULL
;
2820 _pam_get_data(ctx
->pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH
,
2821 &new_authtok_reqd_during_auth
);
2822 pam_set_data(ctx
->pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH
,
2825 if (new_authtok_reqd_during_auth
) {
2829 pwd
= getpwnam(user
);
2834 if (getuid() == pwd
->pw_uid
) {
2843 int pam_sm_chauthtok(pam_handle_t
* pamh
, int flags
,
2844 int argc
, const char **argv
)
2848 bool cached_login
= false;
2850 /* <DO NOT free() THESE> */
2852 char *pass_old
, *pass_new
;
2853 /* </DO NOT free() THESE> */
2858 char *username_ret
= NULL
;
2859 struct wbcAuthErrorInfo
*error
= NULL
;
2860 struct pwb_context
*ctx
= NULL
;
2862 ret
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2867 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx
);
2869 cached_login
= (ctx
->ctrl
& WINBIND_CACHED_LOGIN
);
2871 /* clearing offline bit for auth */
2872 ctx
->ctrl
&= ~WINBIND_CACHED_LOGIN
;
2875 * First get the name of a user
2877 ret
= pam_get_user(pamh
, &user
, _("Username: "));
2879 _pam_log(ctx
, LOG_ERR
,
2880 "password - could not identify user");
2885 _pam_log(ctx
, LOG_ERR
, "username was NULL!");
2886 ret
= PAM_USER_UNKNOWN
;
2890 _pam_log_debug(ctx
, LOG_DEBUG
, "username [%s] obtained", user
);
2892 /* check if this is really a user in winbindd, not only in NSS */
2893 ret
= valid_user(ctx
, user
);
2896 ret
= PAM_USER_UNKNOWN
;
2899 ret
= PAM_SYSTEM_ERR
;
2906 * obtain and verify the current password (OLDAUTHTOK) for
2910 if (flags
& PAM_PRELIM_CHECK
) {
2911 time_t pwdlastset_prelim
= 0;
2913 /* instruct user what is happening */
2915 #define greeting _("Changing password for ")
2916 Announce
= talloc_asprintf(ctx
, "%s %s", greeting
, user
);
2918 _pam_log(ctx
, LOG_CRIT
,
2919 "password - out of memory");
2925 lctrl
= ctx
->ctrl
| WINBIND__OLD_PASSWORD
;
2926 ret
= _winbind_read_password(ctx
, lctrl
,
2928 _("(current) NT password: "),
2930 (const char **) &pass_old
);
2931 TALLOC_FREE(Announce
);
2932 if (ret
!= PAM_SUCCESS
) {
2933 _pam_log(ctx
, LOG_NOTICE
,
2934 "password - (old) token not obtained");
2938 /* verify that this is the password for this user */
2940 ret
= winbind_auth_request(ctx
, user
, pass_old
,
2943 &pwdlastset_prelim
, NULL
);
2945 if (ret
!= PAM_ACCT_EXPIRED
&&
2946 ret
!= PAM_AUTHTOK_EXPIRED
&&
2947 ret
!= PAM_NEW_AUTHTOK_REQD
&&
2948 ret
!= PAM_SUCCESS
) {
2953 pam_set_data(pamh
, PAM_WINBIND_PWD_LAST_SET
,
2954 (void *)pwdlastset_prelim
, NULL
);
2956 ret
= pam_set_item(pamh
, PAM_OLDAUTHTOK
,
2957 (const void *) pass_old
);
2959 if (ret
!= PAM_SUCCESS
) {
2960 _pam_log(ctx
, LOG_CRIT
,
2961 "failed to set PAM_OLDAUTHTOK");
2963 } else if (flags
& PAM_UPDATE_AUTHTOK
) {
2965 time_t pwdlastset_update
= 0;
2968 * obtain the proposed password
2972 * get the old token back.
2975 ret
= _pam_get_item(pamh
, PAM_OLDAUTHTOK
, &pass_old
);
2977 if (ret
!= PAM_SUCCESS
) {
2978 _pam_log(ctx
, LOG_NOTICE
,
2979 "user not authenticated");
2983 lctrl
= ctx
->ctrl
& ~WINBIND_TRY_FIRST_PASS_ARG
;
2985 if (on(WINBIND_USE_AUTHTOK_ARG
, lctrl
)) {
2986 lctrl
|= WINBIND_USE_FIRST_PASS_ARG
;
2989 ret
= PAM_AUTHTOK_ERR
;
2990 while ((ret
!= PAM_SUCCESS
) && (retry
++ < MAX_PASSWD_TRIES
)) {
2992 * use_authtok is to force the use of a previously entered
2993 * password -- needed for pluggable password strength checking
2996 ret
= _winbind_read_password(ctx
, lctrl
,
2998 _("Enter new NT password: "),
2999 _("Retype new NT password: "),
3000 (const char **)&pass_new
);
3002 if (ret
!= PAM_SUCCESS
) {
3003 _pam_log_debug(ctx
, LOG_ALERT
,
3005 "new password not obtained");
3006 pass_old
= NULL
;/* tidy up */
3011 * At this point we know who the user is and what they
3012 * propose as their new password. Verify that the new
3013 * password is acceptable.
3016 if (pass_new
[0] == '\0') {/* "\0" password = NULL */
3022 * By reaching here we have approved the passwords and must now
3023 * rebuild the password database file.
3025 _pam_get_data(pamh
, PAM_WINBIND_PWD_LAST_SET
,
3026 &pwdlastset_update
);
3029 * if cached creds were enabled, make sure to set the
3030 * WINBIND_CACHED_LOGIN bit here in order to have winbindd
3031 * update the cached creds storage - gd
3034 ctx
->ctrl
|= WINBIND_CACHED_LOGIN
;
3037 ret
= winbind_chauthtok_request(ctx
, user
, pass_old
,
3038 pass_new
, pwdlastset_update
);
3040 _pam_overwrite(pass_new
);
3041 _pam_overwrite(pass_old
);
3042 pass_old
= pass_new
= NULL
;
3046 if (_pam_require_krb5_auth_after_chauthtok(ctx
, user
)) {
3048 const char *member
= NULL
;
3049 const char *cctype
= NULL
;
3050 int warn_pwd_expire
;
3051 struct wbcLogonUserInfo
*info
= NULL
;
3052 struct wbcUserPasswordPolicyInfo
*policy
= NULL
;
3054 member
= get_member_from_config(ctx
);
3055 cctype
= get_krb5_cc_type_from_config(ctx
);
3056 warn_pwd_expire
= get_warn_pwd_expire_from_config(ctx
);
3058 /* Keep WINBIND_CACHED_LOGIN bit for
3059 * authentication after changing the password.
3060 * This will update the cached credentials in case
3061 * that winbindd_dual_pam_chauthtok() fails
3066 ret
= winbind_auth_request(ctx
, user
, pass_new
,
3068 &error
, &info
, &policy
,
3069 NULL
, &username_ret
);
3070 _pam_overwrite(pass_new
);
3071 _pam_overwrite(pass_old
);
3072 pass_old
= pass_new
= NULL
;
3074 if (ret
== PAM_SUCCESS
) {
3076 struct wbcAuthUserInfo
*user_info
= NULL
;
3078 if (info
&& info
->info
) {
3079 user_info
= info
->info
;
3082 /* warn a user if the password is about to
3084 _pam_warn_password_expiry(ctx
, user_info
, policy
,
3088 /* set some info3 info for other modules in the
3090 _pam_set_data_info3(ctx
, user_info
);
3092 /* put krb5ccname into env */
3093 _pam_setup_krb5_env(ctx
, info
);
3096 pam_set_item(pamh
, PAM_USER
,
3098 _pam_log_debug(ctx
, LOG_INFO
,
3099 "Returned user was '%s'",
3104 wbcFreeMemory(info
);
3105 wbcFreeMemory(policy
);
3111 ret
= PAM_SERVICE_ERR
;
3116 /* Deal with offline errors. */
3118 const char *codes
[] = {
3119 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3120 "NT_STATUS_NO_LOGON_SERVERS",
3121 "NT_STATUS_ACCESS_DENIED"
3124 for (i
=0; i
<ARRAY_SIZE(codes
); i
++) {
3126 if (_pam_check_remark_auth_err(ctx
, error
, codes
[i
], &_ret
)) {
3132 wbcFreeMemory(error
);
3134 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx
, ret
);
3143 /* static module data */
3145 struct pam_module _pam_winbind_modstruct
= {
3147 pam_sm_authenticate
,
3150 pam_sm_open_session
,
3151 pam_sm_close_session
,
3158 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3159 * Copyright (c) Tim Potter <tpot@samba.org> 2000
3160 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3161 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3162 * Copyright (c) Jan Rêkorajski 1999.
3163 * Copyright (c) Andrew G. Morgan 1996-8.
3164 * Copyright (c) Alex O. Yuriev, 1996.
3165 * Copyright (c) Cristian Gafton 1996.
3166 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3168 * Redistribution and use in source and binary forms, with or without
3169 * modification, are permitted provided that the following conditions
3171 * 1. Redistributions of source code must retain the above copyright
3172 * notice, and the entire permission notice in its entirety,
3173 * including the disclaimer of warranties.
3174 * 2. Redistributions in binary form must reproduce the above copyright
3175 * notice, this list of conditions and the following disclaimer in the
3176 * documentation and/or other materials provided with the distribution.
3177 * 3. The name of the author may not be used to endorse or promote
3178 * products derived from this software without specific prior
3179 * written permission.
3181 * ALTERNATIVELY, this product may be distributed under the terms of
3182 * the GNU Public License, in which case the provisions of the GPL are
3183 * required INSTEAD OF the above restrictions. (This clause is
3184 * necessary due to a potential bad interaction between the GPL and
3185 * the restrictions contained in a BSD-style copyright.)
3187 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3188 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3189 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3190 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3191 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3192 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3193 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3194 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3195 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3196 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3197 * OF THE POSSIBILITY OF SUCH DAMAGE.