3 Copyright Andrew Tridgell <tridge@samba.org> 2000
4 Copyright Tim Potter <tpot@samba.org> 2000
5 Copyright Andrew Bartlett <abartlet@samba.org> 2002
6 Copyright Guenther Deschner <gd@samba.org> 2005-2008
8 largely based on pam_userdb by Cristian Gafton <gafton@redhat.com> also
9 contains large slabs of code from pam_unix by Elliot Lee
10 <sopwith@redhat.com> (see copyright below for full details)
13 #include "pam_winbind.h"
14 #define CONST_DISCARD(type,ptr) ((type)(void *)ptr)
17 static int wbc_error_to_pam_error(wbcErr status
)
22 case WBC_ERR_NOT_IMPLEMENTED
:
23 return PAM_SERVICE_ERR
;
24 case WBC_ERR_UNKNOWN_FAILURE
:
26 case WBC_ERR_NO_MEMORY
:
28 case WBC_ERR_INVALID_SID
:
29 case WBC_ERR_INVALID_PARAM
:
31 case WBC_ERR_WINBIND_NOT_AVAILABLE
:
32 return PAM_AUTHINFO_UNAVAIL
;
33 case WBC_ERR_DOMAIN_NOT_FOUND
:
34 return PAM_AUTHINFO_UNAVAIL
;
35 case WBC_ERR_INVALID_RESPONSE
:
37 case WBC_ERR_NSS_ERROR
:
38 return PAM_USER_UNKNOWN
;
39 case WBC_ERR_AUTH_ERROR
:
41 case WBC_ERR_UNKNOWN_USER
:
42 return PAM_USER_UNKNOWN
;
43 case WBC_ERR_UNKNOWN_GROUP
:
44 return PAM_USER_UNKNOWN
;
45 case WBC_ERR_PWD_CHANGE_FAILED
:
53 static const char *_pam_error_code_str(int err
)
59 return "PAM_OPEN_ERR";
61 return "PAM_SYMBOL_ERR";
63 return "PAM_SERVICE_ERR";
65 return "PAM_SYSTEM_ERR";
69 return "PAM_PERM_DENIED";
71 return "PAM_AUTH_ERR";
72 case PAM_CRED_INSUFFICIENT
:
73 return "PAM_CRED_INSUFFICIENT";
74 case PAM_AUTHINFO_UNAVAIL
:
75 return "PAM_AUTHINFO_UNAVAIL";
76 case PAM_USER_UNKNOWN
:
77 return "PAM_USER_UNKNOWN";
79 return "PAM_MAXTRIES";
80 case PAM_NEW_AUTHTOK_REQD
:
81 return "PAM_NEW_AUTHTOK_REQD";
82 case PAM_ACCT_EXPIRED
:
83 return "PAM_ACCT_EXPIRED";
85 return "PAM_SESSION_ERR";
86 case PAM_CRED_UNAVAIL
:
87 return "PAM_CRED_UNAVAIL";
88 case PAM_CRED_EXPIRED
:
89 return "PAM_CRED_EXPIRED";
91 return "PAM_CRED_ERR";
92 case PAM_NO_MODULE_DATA
:
93 return "PAM_NO_MODULE_DATA";
95 return "PAM_CONV_ERR";
97 return "PAM_AUTHTOK_ERR";
98 case PAM_AUTHTOK_RECOVER_ERR
:
99 return "PAM_AUTHTOK_RECOVER_ERR";
100 case PAM_AUTHTOK_LOCK_BUSY
:
101 return "PAM_AUTHTOK_LOCK_BUSY";
102 case PAM_AUTHTOK_DISABLE_AGING
:
103 return "PAM_AUTHTOK_DISABLE_AGING";
105 return "PAM_TRY_AGAIN";
110 case PAM_AUTHTOK_EXPIRED
:
111 return "PAM_AUTHTOK_EXPIRED";
112 #ifdef PAM_MODULE_UNKNOWN
113 case PAM_MODULE_UNKNOWN
:
114 return "PAM_MODULE_UNKNOWN";
118 return "PAM_BAD_ITEM";
120 #ifdef PAM_CONV_AGAIN
122 return "PAM_CONV_AGAIN";
124 #ifdef PAM_INCOMPLETE
126 return "PAM_INCOMPLETE";
133 #define _PAM_LOG_FUNCTION_ENTER(function, ctx) \
135 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] ENTER: " \
136 function " (flags: 0x%04x)", ctx->pamh, ctx->flags); \
137 _pam_log_state(ctx); \
140 #define _PAM_LOG_FUNCTION_LEAVE(function, ctx, retval) \
142 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] LEAVE: " \
143 function " returning %d (%s)", ctx->pamh, retval, \
144 _pam_error_code_str(retval)); \
145 _pam_log_state(ctx); \
150 #define MAX_PASSWD_TRIES 3
153 static char initialized
= 0;
155 static inline void textdomain_init(void);
156 static inline void textdomain_init(void)
159 bindtextdomain(MODULE_NAME
, LOCALEDIR
);
168 * Work around the pam API that has functions with void ** as parameters
169 * These lead to strict aliasing warnings with gcc.
171 static int _pam_get_item(const pam_handle_t
*pamh
,
175 const void **item
= (const void **)_item
;
176 return pam_get_item(pamh
, item_type
, item
);
178 static int _pam_get_data(const pam_handle_t
*pamh
,
179 const char *module_data_name
,
182 const void **data
= (const void **)_data
;
183 return pam_get_data(pamh
, module_data_name
, data
);
186 /* some syslogging */
188 #ifdef HAVE_PAM_VSYSLOG
189 static void _pam_log_int(const pam_handle_t
*pamh
,
194 pam_vsyslog(pamh
, err
, format
, args
);
197 static void _pam_log_int(const pam_handle_t
*pamh
,
202 char *format2
= NULL
;
205 _pam_get_item(pamh
, PAM_SERVICE
, &service
);
207 format2
= (char *)malloc(strlen(MODULE_NAME
)+strlen(format
)+strlen(service
)+5);
208 if (format2
== NULL
) {
209 /* what else todo ? */
210 vsyslog(err
, format
, args
);
214 sprintf(format2
, "%s(%s): %s", MODULE_NAME
, service
, format
);
215 vsyslog(err
, format2
, args
);
218 #endif /* HAVE_PAM_VSYSLOG */
220 static bool _pam_log_is_silent(int ctrl
)
222 return on(ctrl
, WINBIND_SILENT
);
225 static void _pam_log(struct pwb_context
*r
, int err
, const char *format
, ...) PRINTF_ATTRIBUTE(3,4);
226 static void _pam_log(struct pwb_context
*r
, int err
, const char *format
, ...)
230 if (_pam_log_is_silent(r
->ctrl
)) {
234 va_start(args
, format
);
235 _pam_log_int(r
->pamh
, err
, format
, args
);
238 static void __pam_log(const pam_handle_t
*pamh
, int ctrl
, int err
, const char *format
, ...) PRINTF_ATTRIBUTE(4,5);
239 static void __pam_log(const pam_handle_t
*pamh
, int ctrl
, int err
, const char *format
, ...)
243 if (_pam_log_is_silent(ctrl
)) {
247 va_start(args
, format
);
248 _pam_log_int(pamh
, err
, format
, args
);
252 static bool _pam_log_is_debug_enabled(int ctrl
)
258 if (_pam_log_is_silent(ctrl
)) {
262 if (!(ctrl
& WINBIND_DEBUG_ARG
)) {
269 static bool _pam_log_is_debug_state_enabled(int ctrl
)
271 if (!(ctrl
& WINBIND_DEBUG_STATE
)) {
275 return _pam_log_is_debug_enabled(ctrl
);
278 static void _pam_log_debug(struct pwb_context
*r
, int err
, const char *format
, ...) PRINTF_ATTRIBUTE(3,4);
279 static void _pam_log_debug(struct pwb_context
*r
, int err
, const char *format
, ...)
283 if (!_pam_log_is_debug_enabled(r
->ctrl
)) {
287 va_start(args
, format
);
288 _pam_log_int(r
->pamh
, err
, format
, args
);
291 static void __pam_log_debug(const pam_handle_t
*pamh
, int ctrl
, int err
, const char *format
, ...) PRINTF_ATTRIBUTE(4,5);
292 static void __pam_log_debug(const pam_handle_t
*pamh
, int ctrl
, int err
, const char *format
, ...)
296 if (!_pam_log_is_debug_enabled(ctrl
)) {
300 va_start(args
, format
);
301 _pam_log_int(pamh
, err
, format
, args
);
305 static void _pam_log_state_datum(struct pwb_context
*ctx
,
310 const void *data
= NULL
;
311 if (item_type
!= 0) {
312 pam_get_item(ctx
->pamh
, item_type
, &data
);
314 pam_get_data(ctx
->pamh
, key
, &data
);
317 const char *type
= (item_type
!= 0) ? "ITEM" : "DATA";
318 if (is_string
!= 0) {
319 _pam_log_debug(ctx
, LOG_DEBUG
,
320 "[pamh: %p] STATE: %s(%s) = \"%s\" (%p)",
321 ctx
->pamh
, type
, key
, (const char *)data
,
324 _pam_log_debug(ctx
, LOG_DEBUG
,
325 "[pamh: %p] STATE: %s(%s) = %p",
326 ctx
->pamh
, type
, key
, data
);
331 #define _PAM_LOG_STATE_DATA_POINTER(ctx, module_data_name) \
332 _pam_log_state_datum(ctx, 0, module_data_name, 0)
334 #define _PAM_LOG_STATE_DATA_STRING(ctx, module_data_name) \
335 _pam_log_state_datum(ctx, 0, module_data_name, 1)
337 #define _PAM_LOG_STATE_ITEM_POINTER(ctx, item_type) \
338 _pam_log_state_datum(ctx, item_type, #item_type, 0)
340 #define _PAM_LOG_STATE_ITEM_STRING(ctx, item_type) \
341 _pam_log_state_datum(ctx, item_type, #item_type, 1)
343 #ifdef DEBUG_PASSWORD
344 #define _LOG_PASSWORD_AS_STRING 1
346 #define _LOG_PASSWORD_AS_STRING 0
349 #define _PAM_LOG_STATE_ITEM_PASSWORD(ctx, item_type) \
350 _pam_log_state_datum(ctx, item_type, #item_type, \
351 _LOG_PASSWORD_AS_STRING)
353 static void _pam_log_state(struct pwb_context
*ctx
)
355 if (!_pam_log_is_debug_state_enabled(ctx
->ctrl
)) {
359 _PAM_LOG_STATE_ITEM_STRING(ctx
, PAM_SERVICE
);
360 _PAM_LOG_STATE_ITEM_STRING(ctx
, PAM_USER
);
361 _PAM_LOG_STATE_ITEM_STRING(ctx
, PAM_TTY
);
362 _PAM_LOG_STATE_ITEM_STRING(ctx
, PAM_RHOST
);
363 _PAM_LOG_STATE_ITEM_STRING(ctx
, PAM_RUSER
);
364 _PAM_LOG_STATE_ITEM_PASSWORD(ctx
, PAM_OLDAUTHTOK
);
365 _PAM_LOG_STATE_ITEM_PASSWORD(ctx
, PAM_AUTHTOK
);
366 _PAM_LOG_STATE_ITEM_STRING(ctx
, PAM_USER_PROMPT
);
367 _PAM_LOG_STATE_ITEM_POINTER(ctx
, PAM_CONV
);
368 #ifdef PAM_FAIL_DELAY
369 _PAM_LOG_STATE_ITEM_POINTER(ctx
, PAM_FAIL_DELAY
);
371 #ifdef PAM_REPOSITORY
372 _PAM_LOG_STATE_ITEM_POINTER(ctx
, PAM_REPOSITORY
);
375 _PAM_LOG_STATE_DATA_STRING(ctx
, PAM_WINBIND_HOMEDIR
);
376 _PAM_LOG_STATE_DATA_STRING(ctx
, PAM_WINBIND_LOGONSCRIPT
);
377 _PAM_LOG_STATE_DATA_STRING(ctx
, PAM_WINBIND_LOGONSERVER
);
378 _PAM_LOG_STATE_DATA_STRING(ctx
, PAM_WINBIND_PROFILEPATH
);
379 _PAM_LOG_STATE_DATA_STRING(ctx
,
380 PAM_WINBIND_NEW_AUTHTOK_REQD
);
381 /* Use atoi to get PAM result code */
382 _PAM_LOG_STATE_DATA_STRING(ctx
,
383 PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH
);
384 _PAM_LOG_STATE_DATA_POINTER(ctx
, PAM_WINBIND_PWD_LAST_SET
);
387 static int _pam_parse(const pam_handle_t
*pamh
,
391 dictionary
**result_d
)
394 const char *config_file
= NULL
;
397 dictionary
*d
= NULL
;
399 if (flags
& PAM_SILENT
) {
400 ctrl
|= WINBIND_SILENT
;
403 for (i
=argc
,v
=argv
; i
-- > 0; ++v
) {
404 if (!strncasecmp(*v
, "config", strlen("config"))) {
405 ctrl
|= WINBIND_CONFIG_FILE
;
411 if (config_file
== NULL
) {
412 config_file
= PAM_WINBIND_CONFIG_FILE
;
415 d
= iniparser_load(CONST_DISCARD(char *, config_file
));
417 goto config_from_pam
;
420 if (iniparser_getboolean(d
, CONST_DISCARD(char *, "global:debug"), false)) {
421 ctrl
|= WINBIND_DEBUG_ARG
;
424 if (iniparser_getboolean(d
, CONST_DISCARD(char *, "global:debug_state"), false)) {
425 ctrl
|= WINBIND_DEBUG_STATE
;
428 if (iniparser_getboolean(d
, CONST_DISCARD(char *, "global:cached_login"), false)) {
429 ctrl
|= WINBIND_CACHED_LOGIN
;
432 if (iniparser_getboolean(d
, CONST_DISCARD(char *, "global:krb5_auth"), false)) {
433 ctrl
|= WINBIND_KRB5_AUTH
;
436 if (iniparser_getboolean(d
, CONST_DISCARD(char *, "global:silent"), false)) {
437 ctrl
|= WINBIND_SILENT
;
440 if (iniparser_getstring(d
, CONST_DISCARD(char *, "global:krb5_ccache_type"), NULL
) != NULL
) {
441 ctrl
|= WINBIND_KRB5_CCACHE_TYPE
;
444 if ((iniparser_getstring(d
, CONST_DISCARD(char *, "global:require-membership-of"), NULL
)
446 (iniparser_getstring(d
, CONST_DISCARD(char *, "global:require_membership_of"), NULL
)
448 ctrl
|= WINBIND_REQUIRED_MEMBERSHIP
;
451 if (iniparser_getboolean(d
, CONST_DISCARD(char *, "global:try_first_pass"), false)) {
452 ctrl
|= WINBIND_TRY_FIRST_PASS_ARG
;
455 if (iniparser_getint(d
, CONST_DISCARD(char *, "global:warn_pwd_expire"), 0)) {
456 ctrl
|= WINBIND_WARN_PWD_EXPIRE
;
459 if (iniparser_getboolean(d
, CONST_DISCARD(char *, "global:mkhomedir"), false)) {
460 ctrl
|= WINBIND_MKHOMEDIR
;
464 /* step through arguments */
465 for (i
=argc
,v
=argv
; i
-- > 0; ++v
) {
467 /* generic options */
468 if (!strcmp(*v
,"debug"))
469 ctrl
|= WINBIND_DEBUG_ARG
;
470 else if (!strcasecmp(*v
, "debug_state"))
471 ctrl
|= WINBIND_DEBUG_STATE
;
472 else if (!strcasecmp(*v
, "silent"))
473 ctrl
|= WINBIND_SILENT
;
474 else if (!strcasecmp(*v
, "use_authtok"))
475 ctrl
|= WINBIND_USE_AUTHTOK_ARG
;
476 else if (!strcasecmp(*v
, "use_first_pass"))
477 ctrl
|= WINBIND_USE_FIRST_PASS_ARG
;
478 else if (!strcasecmp(*v
, "try_first_pass"))
479 ctrl
|= WINBIND_TRY_FIRST_PASS_ARG
;
480 else if (!strcasecmp(*v
, "unknown_ok"))
481 ctrl
|= WINBIND_UNKNOWN_OK_ARG
;
482 else if (!strncasecmp(*v
, "require_membership_of",
483 strlen("require_membership_of")))
484 ctrl
|= WINBIND_REQUIRED_MEMBERSHIP
;
485 else if (!strncasecmp(*v
, "require-membership-of",
486 strlen("require-membership-of")))
487 ctrl
|= WINBIND_REQUIRED_MEMBERSHIP
;
488 else if (!strcasecmp(*v
, "krb5_auth"))
489 ctrl
|= WINBIND_KRB5_AUTH
;
490 else if (!strncasecmp(*v
, "krb5_ccache_type",
491 strlen("krb5_ccache_type")))
492 ctrl
|= WINBIND_KRB5_CCACHE_TYPE
;
493 else if (!strcasecmp(*v
, "cached_login"))
494 ctrl
|= WINBIND_CACHED_LOGIN
;
495 else if (!strcasecmp(*v
, "mkhomedir"))
496 ctrl
|= WINBIND_MKHOMEDIR
;
498 __pam_log(pamh
, ctrl
, LOG_ERR
,
499 "pam_parse: unknown option: %s", *v
);
509 iniparser_freedict(d
);
516 static int _pam_winbind_free_context(struct pwb_context
*ctx
)
523 iniparser_freedict(ctx
->dict
);
529 static int _pam_winbind_init_context(pam_handle_t
*pamh
,
533 struct pwb_context
**ctx_p
)
535 struct pwb_context
*r
= NULL
;
541 r
= TALLOC_ZERO_P(NULL
, struct pwb_context
);
546 talloc_set_destructor(r
, _pam_winbind_free_context
);
552 r
->ctrl
= _pam_parse(pamh
, flags
, argc
, argv
, &r
->dict
);
555 return PAM_SYSTEM_ERR
;
563 static void _pam_winbind_cleanup_func(pam_handle_t
*pamh
,
567 int ctrl
= _pam_parse(pamh
, 0, 0, NULL
, NULL
);
568 if (_pam_log_is_debug_state_enabled(ctrl
)) {
569 __pam_log_debug(pamh
, ctrl
, LOG_DEBUG
,
570 "[pamh: %p] CLEAN: cleaning up PAM data %p "
571 "(error_status = %d)", pamh
, data
,
578 static const struct ntstatus_errors
{
579 const char *ntstatus_string
;
580 const char *error_string
;
581 } ntstatus_errors
[] = {
584 {"NT_STATUS_BACKUP_CONTROLLER",
585 N_("No primary Domain Controler available")},
586 {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
587 N_("No domain controllers found")},
588 {"NT_STATUS_NO_LOGON_SERVERS",
589 N_("No logon servers")},
590 {"NT_STATUS_PWD_TOO_SHORT",
591 N_("Password too short")},
592 {"NT_STATUS_PWD_TOO_RECENT",
593 N_("The password of this user is too recent to change")},
594 {"NT_STATUS_PWD_HISTORY_CONFLICT",
595 N_("Password is already in password history")},
596 {"NT_STATUS_PASSWORD_EXPIRED",
597 N_("Your password has expired")},
598 {"NT_STATUS_PASSWORD_MUST_CHANGE",
599 N_("You need to change your password now")},
600 {"NT_STATUS_INVALID_WORKSTATION",
601 N_("You are not allowed to logon from this workstation")},
602 {"NT_STATUS_INVALID_LOGON_HOURS",
603 N_("You are not allowed to logon at this time")},
604 {"NT_STATUS_ACCOUNT_EXPIRED",
605 N_("Your account has expired. "
606 "Please contact your System administrator")}, /* SCNR */
607 {"NT_STATUS_ACCOUNT_DISABLED",
608 N_("Your account is disabled. "
609 "Please contact your System administrator")}, /* SCNR */
610 {"NT_STATUS_ACCOUNT_LOCKED_OUT",
611 N_("Your account has been locked. "
612 "Please contact your System administrator")}, /* SCNR */
613 {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
614 N_("Invalid Trust Account")},
615 {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
616 N_("Invalid Trust Account")},
617 {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
618 N_("Invalid Trust Account")},
619 {"NT_STATUS_ACCESS_DENIED",
620 N_("Access is denied")},
624 static const char *_get_ntstatus_error_string(const char *nt_status_string
)
627 for (i
=0; ntstatus_errors
[i
].ntstatus_string
!= NULL
; i
++) {
628 if (!strcasecmp(ntstatus_errors
[i
].ntstatus_string
,
630 return _(ntstatus_errors
[i
].error_string
);
636 /* --- authentication management functions --- */
638 /* Attempt a conversation */
640 static int converse(const pam_handle_t
*pamh
,
642 struct pam_message
**message
,
643 struct pam_response
**response
)
646 struct pam_conv
*conv
;
648 retval
= _pam_get_item(pamh
, PAM_CONV
, &conv
);
649 if (retval
== PAM_SUCCESS
) {
650 retval
= conv
->conv(nargs
,
651 (const struct pam_message
**)message
,
652 response
, conv
->appdata_ptr
);
655 return retval
; /* propagate error status */
659 static int _make_remark(struct pwb_context
*ctx
,
663 int retval
= PAM_SUCCESS
;
665 struct pam_message
*pmsg
[1], msg
[1];
666 struct pam_response
*resp
;
668 if (ctx
->flags
& WINBIND_SILENT
) {
673 msg
[0].msg
= discard_const_p(char, text
);
674 msg
[0].msg_style
= type
;
677 retval
= converse(ctx
->pamh
, 1, pmsg
, &resp
);
680 _pam_drop_reply(resp
, 1);
685 static int _make_remark_v(struct pwb_context
*ctx
,
693 ret
= vasprintf(&var
, format
, args
);
695 _pam_log(ctx
, LOG_ERR
, "memory allocation failure");
699 ret
= _make_remark(ctx
, type
, var
);
704 static int _make_remark_format(struct pwb_context
*ctx
, int type
, const char *format
, ...) PRINTF_ATTRIBUTE(3,4);
705 static int _make_remark_format(struct pwb_context
*ctx
, int type
, const char *format
, ...)
710 va_start(args
, format
);
711 ret
= _make_remark_v(ctx
, type
, format
, args
);
716 static int pam_winbind_request_log(struct pwb_context
*ctx
,
723 /* incorrect password */
724 _pam_log(ctx
, LOG_WARNING
, "user '%s' denied access "
725 "(incorrect password or invalid membership)", user
);
727 case PAM_ACCT_EXPIRED
:
728 /* account expired */
729 _pam_log(ctx
, LOG_WARNING
, "user '%s' account expired",
732 case PAM_AUTHTOK_EXPIRED
:
733 /* password expired */
734 _pam_log(ctx
, LOG_WARNING
, "user '%s' password expired",
737 case PAM_NEW_AUTHTOK_REQD
:
738 /* new password required */
739 _pam_log(ctx
, LOG_WARNING
, "user '%s' new password "
742 case PAM_USER_UNKNOWN
:
743 /* the user does not exist */
744 _pam_log_debug(ctx
, LOG_NOTICE
, "user '%s' not found",
746 if (ctx
->ctrl
& WINBIND_UNKNOWN_OK_ARG
) {
751 /* Otherwise, the authentication looked good */
752 if (strcmp(fn
, "wbcLogonUser") == 0) {
753 _pam_log(ctx
, LOG_NOTICE
,
754 "user '%s' granted access", user
);
756 _pam_log(ctx
, LOG_NOTICE
,
757 "user '%s' OK", user
);
761 /* we don't know anything about this return value */
762 _pam_log(ctx
, LOG_ERR
,
763 "internal module error (retval = %s(%d), user = '%s')",
764 _pam_error_code_str(retval
), retval
, user
);
769 static int wbc_auth_error_to_pam_error(struct pwb_context
*ctx
,
770 struct wbcAuthErrorInfo
*e
,
772 const char *username
,
775 int ret
= PAM_AUTH_ERR
;
777 if (WBC_ERROR_IS_OK(status
)) {
778 _pam_log_debug(ctx
, LOG_DEBUG
, "request %s succeeded",
781 return pam_winbind_request_log(ctx
, ret
, username
, fn
);
785 if (e
->pam_error
!= PAM_SUCCESS
) {
786 _pam_log(ctx
, LOG_ERR
,
787 "request %s failed: %s, "
788 "PAM error: %s (%d), NTSTATUS: %s, "
789 "Error message was: %s",
791 wbcErrorString(status
),
792 _pam_error_code_str(e
->pam_error
),
797 return pam_winbind_request_log(ctx
, ret
, username
, fn
);
800 _pam_log(ctx
, LOG_ERR
, "request %s failed, but PAM error 0!", fn
);
802 ret
= PAM_SERVICE_ERR
;
803 return pam_winbind_request_log(ctx
, ret
, username
, fn
);
806 ret
= wbc_error_to_pam_error(status
);
807 return pam_winbind_request_log(ctx
, ret
, username
, fn
);
810 #if defined(HAVE_PAM_RADIO_TYPE)
811 static bool _pam_winbind_change_pwd(struct pwb_context
*ctx
)
813 struct pam_message msg
, *pmsg
;
814 struct pam_response
*resp
= NULL
;
818 prompt
= _("Do you want to change your password now?");
820 msg
.msg_style
= PAM_RADIO_TYPE
;
822 ret
= converse(ctx
->pamh
, 1, &pmsg
, &resp
);
824 if (ret
== PAM_SUCCESS
) {
825 _pam_log(ctx
, LOG_CRIT
, "pam_winbind: system error!\n");
829 if (ret
!= PAM_SUCCESS
) {
832 _pam_log(ctx
, LOG_CRIT
, "Received [%s] reply from application.\n", resp
->resp
);
834 if ((resp
->resp
!= NULL
) && (strcasecmp(resp
->resp
, "yes") == 0)) {
838 _pam_drop_reply(resp
, 1);
842 static bool _pam_winbind_change_pwd(struct pwb_context
*ctx
)
849 * send a password expiry message if required
851 * @param ctx PAM winbind context.
852 * @param next_change expected (calculated) next expiry date.
853 * @param already_expired pointer to a boolean to indicate if the password is
856 * @return boolean Returns true if message has been sent, false if not.
859 static bool _pam_send_password_expiry_message(struct pwb_context
*ctx
,
863 bool *already_expired
,
867 struct tm tm_now
, tm_next_change
;
871 if (already_expired
) {
872 *already_expired
= false;
879 if (next_change
<= now
) {
880 PAM_WB_REMARK_DIRECT(ctx
, "NT_STATUS_PASSWORD_EXPIRED");
881 if (already_expired
) {
882 *already_expired
= true;
887 if ((next_change
< 0) ||
888 (next_change
> now
+ warn_pwd_expire
* SECONDS_PER_DAY
)) {
892 if ((localtime_r(&now
, &tm_now
) == NULL
) ||
893 (localtime_r(&next_change
, &tm_next_change
) == NULL
)) {
897 days
= (tm_next_change
.tm_yday
+tm_next_change
.tm_year
*365) -
898 (tm_now
.tm_yday
+tm_now
.tm_year
*365);
901 ret
= _make_remark(ctx
, PAM_TEXT_INFO
,
902 _("Your password expires today.\n"));
905 * If change_pwd and already_expired is null.
906 * We are just sending a notification message.
907 * We don't expect any response in this case.
910 if (!change_pwd
&& !already_expired
) {
915 * successfully sent the warning message.
916 * Give the user a chance to change pwd.
918 if (ret
== PAM_SUCCESS
) {
920 retval
= _pam_winbind_change_pwd(ctx
);
929 if (days
> 0 && days
< warn_pwd_expire
) {
931 ret
= _make_remark_format(ctx
, PAM_TEXT_INFO
,
932 _("Your password will expire in %d %s.\n"),
933 days
, (days
> 1) ? _("days"):_("day"));
935 * If change_pwd and already_expired is null.
936 * We are just sending a notification message.
937 * We don't expect any response in this case.
940 if (!change_pwd
&& !already_expired
) {
945 * successfully sent the warning message.
946 * Give the user a chance to change pwd.
948 if (ret
== PAM_SUCCESS
) {
950 retval
= _pam_winbind_change_pwd(ctx
);
963 * Send a warning if the password expires in the near future
965 * @param ctx PAM winbind context.
966 * @param response The full authentication response structure.
967 * @param already_expired boolean, is the pwd already expired?
972 static void _pam_warn_password_expiry(struct pwb_context
*ctx
,
973 const struct wbcAuthUserInfo
*info
,
974 const struct wbcUserPasswordPolicyInfo
*policy
,
976 bool *already_expired
,
979 time_t now
= time(NULL
);
980 time_t next_change
= 0;
982 if (!info
|| !policy
) {
986 if (already_expired
) {
987 *already_expired
= false;
994 /* accounts with WBC_ACB_PWNOEXP set never receive a warning */
995 if (info
->acct_flags
& WBC_ACB_PWNOEXP
) {
999 /* no point in sending a warning if this is a grace logon */
1000 if (PAM_WB_GRACE_LOGON(info
->user_flags
)) {
1004 /* check if the info3 must change timestamp has been set */
1005 next_change
= info
->pass_must_change_time
;
1007 if (_pam_send_password_expiry_message(ctx
, next_change
, now
,
1014 /* now check for the global password policy */
1015 /* good catch from Ralf Haferkamp: an expiry of "never" is translated
1017 if ((policy
->expire
== (int64_t)-1) ||
1018 (policy
->expire
== 0)) {
1022 next_change
= info
->pass_last_set_time
+ policy
->expire
;
1024 if (_pam_send_password_expiry_message(ctx
, next_change
, now
,
1031 /* no warning sent */
1034 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
1037 * Append a string, making sure not to overflow and to always return a
1038 * NULL-terminated string.
1040 * @param dest Destination string buffer (must already be NULL-terminated).
1041 * @param src Source string buffer.
1042 * @param dest_buffer_size Size of dest buffer in bytes.
1044 * @return false if dest buffer is not big enough (no bytes copied), true on
1048 static bool safe_append_string(char *dest
,
1050 int dest_buffer_size
)
1052 int dest_length
= strlen(dest
);
1053 int src_length
= strlen(src
);
1055 if (dest_length
+ src_length
+ 1 > dest_buffer_size
) {
1059 memcpy(dest
+ dest_length
, src
, src_length
+ 1);
1064 * Convert a names into a SID string, appending it to a buffer.
1066 * @param ctx PAM winbind context.
1067 * @param user User in PAM request.
1068 * @param name Name to convert.
1069 * @param sid_list_buffer Where to append the string sid.
1070 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1072 * @return false on failure, true on success.
1074 static bool winbind_name_to_sid_string(struct pwb_context
*ctx
,
1077 char *sid_list_buffer
,
1078 int sid_list_buffer_size
)
1080 char sid_string
[WBC_SID_STRING_BUFLEN
];
1083 if (IS_SID_STRING(name
)) {
1084 strlcpy(sid_string
, name
, sizeof(sid_string
));
1087 struct wbcDomainSid sid
;
1088 enum wbcSidType type
;
1090 _pam_log_debug(ctx
, LOG_DEBUG
,
1091 "no sid given, looking up: %s\n", name
);
1093 wbc_status
= wbcLookupName("", name
, &sid
, &type
);
1094 if (!WBC_ERROR_IS_OK(wbc_status
)) {
1095 _pam_log(ctx
, LOG_INFO
,
1096 "could not lookup name: %s\n", name
);
1100 wbcSidToStringBuf(&sid
, sid_string
, sizeof(sid_string
));
1103 if (!safe_append_string(sid_list_buffer
, sid_string
,
1104 sid_list_buffer_size
)) {
1111 * Convert a list of names into a list of sids.
1113 * @param ctx PAM winbind context.
1114 * @param user User in PAM request.
1115 * @param name_list List of names or string sids, separated by commas.
1116 * @param sid_list_buffer Where to put the list of string sids.
1117 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1119 * @return false on failure, true on success.
1121 static bool winbind_name_list_to_sid_string_list(struct pwb_context
*ctx
,
1123 const char *name_list
,
1124 char *sid_list_buffer
,
1125 int sid_list_buffer_size
)
1127 bool result
= false;
1128 char *current_name
= NULL
;
1129 const char *search_location
;
1133 if (sid_list_buffer_size
> 0) {
1134 sid_list_buffer
[0] = 0;
1137 search_location
= name_list
;
1138 while ((comma
= strchr(search_location
, ',')) != NULL
) {
1139 current_name
= strndup(search_location
,
1140 comma
- search_location
);
1141 if (NULL
== current_name
) {
1145 if (!winbind_name_to_sid_string(ctx
, user
,
1148 sid_list_buffer_size
)) {
1150 * If one group name failed, we must not fail
1151 * the authentication totally, continue with
1152 * the following group names. If user belongs to
1153 * one of the valid groups, we must allow it
1157 _pam_log(ctx
, LOG_INFO
, "cannot convert group %s to sid, "
1158 "check if group %s is valid group.", current_name
,
1160 _make_remark_format(ctx
, PAM_TEXT_INFO
, _("Cannot convert group %s "
1161 "to sid, please contact your administrator to see "
1162 "if group %s is valid."), current_name
, current_name
);
1163 SAFE_FREE(current_name
);
1164 search_location
= comma
+ 1;
1168 SAFE_FREE(current_name
);
1170 if (!safe_append_string(sid_list_buffer
, ",",
1171 sid_list_buffer_size
)) {
1175 search_location
= comma
+ 1;
1178 if (!winbind_name_to_sid_string(ctx
, user
, search_location
,
1180 sid_list_buffer_size
)) {
1181 _pam_log(ctx
, LOG_INFO
, "cannot convert group %s to sid, "
1182 "check if group %s is valid group.", search_location
,
1184 _make_remark_format(ctx
, PAM_TEXT_INFO
, _("Cannot convert group %s "
1185 "to sid, please contact your administrator to see "
1186 "if group %s is valid."), search_location
, search_location
);
1188 /* If no valid groups were converted we should fail outright */
1189 if (name_list
!= NULL
&& strlen(sid_list_buffer
) == 0) {
1194 * The lookup of the last name failed..
1195 * It results in require_member_of_sid ends with ','
1196 * It is malformated parameter here, overwrite the last ','.
1198 len
= strlen(sid_list_buffer
);
1199 if ((len
!= 0) && (sid_list_buffer
[len
- 1] == ',')) {
1200 sid_list_buffer
[len
- 1] = '\0';
1207 SAFE_FREE(current_name
);
1212 * put krb5ccname variable into environment
1214 * @param ctx PAM winbind context.
1215 * @param krb5ccname env variable retrieved from winbindd.
1220 static void _pam_setup_krb5_env(struct pwb_context
*ctx
,
1221 struct wbcLogonUserInfo
*info
)
1226 const char *krb5ccname
= NULL
;
1228 if (off(ctx
->ctrl
, WINBIND_KRB5_AUTH
)) {
1236 for (i
=0; i
< info
->num_blobs
; i
++) {
1237 if (strcasecmp(info
->blobs
[i
].name
, "krb5ccname") == 0) {
1238 krb5ccname
= (const char *)info
->blobs
[i
].blob
.data
;
1243 if (!krb5ccname
|| (strlen(krb5ccname
) == 0)) {
1247 _pam_log_debug(ctx
, LOG_DEBUG
,
1248 "request returned KRB5CCNAME: %s", krb5ccname
);
1250 if (snprintf(var
, sizeof(var
), "KRB5CCNAME=%s", krb5ccname
) == -1) {
1254 ret
= pam_putenv(ctx
->pamh
, var
);
1256 _pam_log(ctx
, LOG_ERR
,
1257 "failed to set KRB5CCNAME to %s: %s",
1258 var
, pam_strerror(ctx
->pamh
, ret
));
1263 * Copy unix username if available (further processed in PAM).
1265 * @param ctx PAM winbind context
1266 * @param user_ret A pointer that holds a pointer to a string
1267 * @param unix_username A username
1272 static void _pam_setup_unix_username(struct pwb_context
*ctx
,
1274 struct wbcLogonUserInfo
*info
)
1276 const char *unix_username
= NULL
;
1279 if (!user_ret
|| !info
) {
1283 for (i
=0; i
< info
->num_blobs
; i
++) {
1284 if (strcasecmp(info
->blobs
[i
].name
, "unix_username") == 0) {
1285 unix_username
= (const char *)info
->blobs
[i
].blob
.data
;
1290 if (!unix_username
|| !unix_username
[0]) {
1294 *user_ret
= strdup(unix_username
);
1298 * Set string into the PAM stack.
1300 * @param ctx PAM winbind context.
1301 * @param data_name Key name for pam_set_data.
1302 * @param value String value.
1307 static void _pam_set_data_string(struct pwb_context
*ctx
,
1308 const char *data_name
,
1313 if (!data_name
|| !value
|| (strlen(data_name
) == 0) ||
1314 (strlen(value
) == 0)) {
1318 ret
= pam_set_data(ctx
->pamh
, data_name
, talloc_strdup(NULL
, value
),
1319 _pam_winbind_cleanup_func
);
1321 _pam_log_debug(ctx
, LOG_DEBUG
,
1322 "Could not set data %s: %s\n",
1323 data_name
, pam_strerror(ctx
->pamh
, ret
));
1328 * Set info3 strings into the PAM stack.
1330 * @param ctx PAM winbind context.
1331 * @param data_name Key name for pam_set_data.
1332 * @param value String value.
1337 static void _pam_set_data_info3(struct pwb_context
*ctx
,
1338 const struct wbcAuthUserInfo
*info
)
1340 _pam_set_data_string(ctx
, PAM_WINBIND_HOMEDIR
,
1341 info
->home_directory
);
1342 _pam_set_data_string(ctx
, PAM_WINBIND_LOGONSCRIPT
,
1343 info
->logon_script
);
1344 _pam_set_data_string(ctx
, PAM_WINBIND_LOGONSERVER
,
1345 info
->logon_server
);
1346 _pam_set_data_string(ctx
, PAM_WINBIND_PROFILEPATH
,
1347 info
->profile_path
);
1351 * Free info3 strings in the PAM stack.
1353 * @param pamh PAM handle
1358 static void _pam_free_data_info3(pam_handle_t
*pamh
)
1360 pam_set_data(pamh
, PAM_WINBIND_HOMEDIR
, NULL
, NULL
);
1361 pam_set_data(pamh
, PAM_WINBIND_LOGONSCRIPT
, NULL
, NULL
);
1362 pam_set_data(pamh
, PAM_WINBIND_LOGONSERVER
, NULL
, NULL
);
1363 pam_set_data(pamh
, PAM_WINBIND_PROFILEPATH
, NULL
, NULL
);
1367 * Send PAM_ERROR_MSG for cached or grace logons.
1369 * @param ctx PAM winbind context.
1370 * @param username User in PAM request.
1371 * @param info3_user_flgs Info3 flags containing logon type bits.
1376 static void _pam_warn_logon_type(struct pwb_context
*ctx
,
1377 const char *username
,
1378 uint32_t info3_user_flgs
)
1380 /* inform about logon type */
1381 if (PAM_WB_GRACE_LOGON(info3_user_flgs
)) {
1383 _make_remark(ctx
, PAM_ERROR_MSG
,
1385 "Please change your password as soon you're "
1387 _pam_log_debug(ctx
, LOG_DEBUG
,
1388 "User %s logged on using grace logon\n",
1391 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs
)) {
1393 _make_remark(ctx
, PAM_ERROR_MSG
,
1394 _("Domain Controller unreachable, "
1395 "using cached credentials instead. "
1396 "Network resources may be unavailable"));
1397 _pam_log_debug(ctx
, LOG_DEBUG
,
1398 "User %s logged on using cached credentials\n",
1404 * Send PAM_ERROR_MSG for krb5 errors.
1406 * @param ctx PAM winbind context.
1407 * @param username User in PAM request.
1408 * @param info3_user_flgs Info3 flags containing logon type bits.
1413 static void _pam_warn_krb5_failure(struct pwb_context
*ctx
,
1414 const char *username
,
1415 uint32_t info3_user_flgs
)
1417 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs
)) {
1418 _make_remark(ctx
, PAM_ERROR_MSG
,
1419 _("Failed to establish your Kerberos Ticket cache "
1420 "due time differences\n"
1421 "with the domain controller. "
1422 "Please verify the system time.\n"));
1423 _pam_log_debug(ctx
, LOG_DEBUG
,
1424 "User %s: Clock skew when getting Krb5 TGT\n",
1429 static bool _pam_check_remark_auth_err(struct pwb_context
*ctx
,
1430 const struct wbcAuthErrorInfo
*e
,
1431 const char *nt_status_string
,
1434 const char *ntstatus
= NULL
;
1435 const char *error_string
= NULL
;
1437 if (!e
|| !pam_err
) {
1441 ntstatus
= e
->nt_string
;
1446 if (strcasecmp(ntstatus
, nt_status_string
) == 0) {
1448 error_string
= _get_ntstatus_error_string(nt_status_string
);
1450 _make_remark(ctx
, PAM_ERROR_MSG
, error_string
);
1451 *pam_err
= e
->pam_error
;
1455 if (e
->display_string
) {
1456 _make_remark(ctx
, PAM_ERROR_MSG
, _(e
->display_string
));
1457 *pam_err
= e
->pam_error
;
1461 _make_remark(ctx
, PAM_ERROR_MSG
, nt_status_string
);
1462 *pam_err
= e
->pam_error
;
1471 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1473 * @param i The wbcUserPasswordPolicyInfo struct.
1475 * @return string (caller needs to talloc_free).
1478 static char *_pam_compose_pwd_restriction_string(struct pwb_context
*ctx
,
1479 struct wbcUserPasswordPolicyInfo
*i
)
1487 str
= talloc_asprintf(ctx
, _("Your password "));
1492 if (i
->min_length_password
> 0) {
1493 str
= talloc_asprintf_append(str
,
1494 _("must be at least %d characters; "),
1495 i
->min_length_password
);
1501 if (i
->password_history
> 0) {
1502 str
= talloc_asprintf_append(str
,
1503 _("cannot repeat any of your previous %d "
1505 i
->password_history
);
1511 if (i
->password_properties
& WBC_DOMAIN_PASSWORD_COMPLEX
) {
1512 str
= talloc_asprintf_append(str
,
1513 _("must contain capitals, numerals "
1515 "and cannot contain your account "
1522 str
= talloc_asprintf_append(str
,
1523 _("Please type a different password. "
1524 "Type a password which meets these requirements in "
1525 "both text boxes."));
1537 static int _pam_create_homedir(struct pwb_context
*ctx
,
1538 const char *dirname
,
1543 if (stat(dirname
, &sbuf
) == 0) {
1547 if (mkdir(dirname
, mode
) != 0) {
1549 _make_remark_format(ctx
, PAM_TEXT_INFO
,
1550 _("Creating directory: %s failed: %s"),
1551 dirname
, strerror(errno
));
1552 _pam_log(ctx
, LOG_ERR
, "could not create dir: %s (%s)",
1553 dirname
, strerror(errno
));
1554 return PAM_PERM_DENIED
;
1560 static int _pam_chown_homedir(struct pwb_context
*ctx
,
1561 const char *dirname
,
1565 if (chown(dirname
, uid
, gid
) != 0) {
1566 _pam_log(ctx
, LOG_ERR
, "failed to chown user homedir: %s (%s)",
1567 dirname
, strerror(errno
));
1568 return PAM_PERM_DENIED
;
1574 static int _pam_mkhomedir(struct pwb_context
*ctx
)
1576 struct passwd
*pwd
= NULL
;
1578 char *create_dir
= NULL
;
1579 char *user_dir
= NULL
;
1581 const char *username
;
1583 char *safe_ptr
= NULL
;
1586 /* Get the username */
1587 ret
= pam_get_user(ctx
->pamh
, &username
, NULL
);
1588 if ((ret
!= PAM_SUCCESS
) || (!username
)) {
1589 _pam_log_debug(ctx
, LOG_DEBUG
, "can not get the username");
1590 return PAM_SERVICE_ERR
;
1593 pwd
= getpwnam(username
);
1595 _pam_log_debug(ctx
, LOG_DEBUG
, "can not get the username");
1596 return PAM_USER_UNKNOWN
;
1598 _pam_log_debug(ctx
, LOG_DEBUG
, "homedir is: %s", pwd
->pw_dir
);
1600 ret
= _pam_create_homedir(ctx
, pwd
->pw_dir
, 0700);
1601 if (ret
== PAM_SUCCESS
) {
1602 ret
= _pam_chown_homedir(ctx
, pwd
->pw_dir
,
1607 if (ret
== PAM_SUCCESS
) {
1611 /* maybe we need to create parent dirs */
1612 create_dir
= talloc_strdup(ctx
, "/");
1617 /* find final directory */
1618 user_dir
= strrchr(pwd
->pw_dir
, '/');
1624 _pam_log(ctx
, LOG_DEBUG
, "final directory: %s", user_dir
);
1628 while ((token
= strtok_r(p
, "/", &safe_ptr
)) != NULL
) {
1634 _pam_log_debug(ctx
, LOG_DEBUG
, "token is %s", token
);
1636 create_dir
= talloc_asprintf_append(create_dir
, "%s/", token
);
1640 _pam_log_debug(ctx
, LOG_DEBUG
, "current_dir is %s", create_dir
);
1642 if (strcmp(token
, user_dir
) == 0) {
1643 _pam_log_debug(ctx
, LOG_DEBUG
, "assuming last directory: %s", token
);
1647 ret
= _pam_create_homedir(ctx
, create_dir
, mode
);
1653 return _pam_chown_homedir(ctx
, create_dir
,
1658 /* talk to winbindd */
1659 static int winbind_auth_request(struct pwb_context
*ctx
,
1664 const int warn_pwd_expire
,
1665 struct wbcAuthErrorInfo
**p_error
,
1666 struct wbcLogonUserInfo
**p_info
,
1667 struct wbcUserPasswordPolicyInfo
**p_policy
,
1668 time_t *pwd_last_set
,
1673 struct wbcLogonUserParams logon
;
1674 char membership_of
[1024];
1675 uid_t user_uid
= -1;
1676 uint32_t flags
= WBFLAG_PAM_INFO3_TEXT
|
1677 WBFLAG_PAM_GET_PWD_POLICY
;
1679 struct wbcLogonUserInfo
*info
= NULL
;
1680 struct wbcAuthUserInfo
*user_info
= NULL
;
1681 struct wbcAuthErrorInfo
*error
= NULL
;
1682 struct wbcUserPasswordPolicyInfo
*policy
= NULL
;
1684 int ret
= PAM_AUTH_ERR
;
1686 const char *codes
[] = {
1687 "NT_STATUS_PASSWORD_EXPIRED",
1688 "NT_STATUS_PASSWORD_MUST_CHANGE",
1689 "NT_STATUS_INVALID_WORKSTATION",
1690 "NT_STATUS_INVALID_LOGON_HOURS",
1691 "NT_STATUS_ACCOUNT_EXPIRED",
1692 "NT_STATUS_ACCOUNT_DISABLED",
1693 "NT_STATUS_ACCOUNT_LOCKED_OUT",
1694 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1695 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1696 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1697 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1698 "NT_STATUS_NO_LOGON_SERVERS",
1699 "NT_STATUS_WRONG_PASSWORD",
1700 "NT_STATUS_ACCESS_DENIED"
1707 /* Krb5 auth always has to go against the KDC of the user's realm */
1709 if (ctx
->ctrl
& WINBIND_KRB5_AUTH
) {
1710 flags
|= WBFLAG_PAM_CONTACT_TRUSTDOM
;
1713 if (ctx
->ctrl
& (WINBIND_KRB5_AUTH
|WINBIND_CACHED_LOGIN
)) {
1714 struct passwd
*pwd
= NULL
;
1716 pwd
= getpwnam(user
);
1718 return PAM_USER_UNKNOWN
;
1720 user_uid
= pwd
->pw_uid
;
1723 if (ctx
->ctrl
& WINBIND_KRB5_AUTH
) {
1725 _pam_log_debug(ctx
, LOG_DEBUG
,
1726 "enabling krb5 login flag\n");
1728 flags
|= WBFLAG_PAM_KRB5
|
1729 WBFLAG_PAM_FALLBACK_AFTER_KRB5
;
1732 if (ctx
->ctrl
& WINBIND_CACHED_LOGIN
) {
1733 _pam_log_debug(ctx
, LOG_DEBUG
,
1734 "enabling cached login flag\n");
1735 flags
|= WBFLAG_PAM_CACHED_LOGIN
;
1740 flags
|= WBFLAG_PAM_UNIX_NAME
;
1743 if (cctype
!= NULL
) {
1744 _pam_log_debug(ctx
, LOG_DEBUG
,
1745 "enabling request for a %s krb5 ccache\n",
1749 if (member
!= NULL
) {
1751 ZERO_STRUCT(membership_of
);
1753 if (!winbind_name_list_to_sid_string_list(ctx
, user
, member
,
1755 sizeof(membership_of
))) {
1756 _pam_log_debug(ctx
, LOG_ERR
,
1757 "failed to serialize membership of sid "
1758 "\"%s\"\n", member
);
1759 return PAM_AUTH_ERR
;
1765 logon
.username
= user
;
1766 logon
.password
= pass
;
1769 wbc_status
= wbcAddNamedBlob(&logon
.num_blobs
,
1775 if (!WBC_ERROR_IS_OK(wbc_status
)) {
1780 wbc_status
= wbcAddNamedBlob(&logon
.num_blobs
,
1786 if (!WBC_ERROR_IS_OK(wbc_status
)) {
1790 wbc_status
= wbcAddNamedBlob(&logon
.num_blobs
,
1794 (uint8_t *)&user_uid
,
1796 if (!WBC_ERROR_IS_OK(wbc_status
)) {
1801 wbc_status
= wbcAddNamedBlob(&logon
.num_blobs
,
1805 (uint8_t *)membership_of
,
1806 sizeof(membership_of
));
1807 if (!WBC_ERROR_IS_OK(wbc_status
)) {
1812 wbc_status
= wbcLogonUser(&logon
, &info
, &error
, &policy
);
1813 ret
= wbc_auth_error_to_pam_error(ctx
, error
, wbc_status
,
1814 user
, "wbcLogonUser");
1815 wbcFreeMemory(logon
.blobs
);
1818 if (info
&& info
->info
) {
1819 user_info
= info
->info
;
1822 if (pwd_last_set
&& user_info
) {
1823 *pwd_last_set
= user_info
->pass_last_set_time
;
1826 if (p_info
&& info
) {
1830 if (p_policy
&& policy
) {
1834 if (p_error
&& error
) {
1835 /* We want to process the error in the caller. */
1840 for (i
=0; i
<ARRAY_SIZE(codes
); i
++) {
1842 if (_pam_check_remark_auth_err(ctx
, error
, codes
[i
], &_ret
)) {
1848 if ((ret
== PAM_SUCCESS
) && user_info
&& policy
&& info
) {
1850 bool already_expired
= false;
1851 bool change_pwd
= false;
1853 /* warn a user if the password is about to expire soon */
1854 _pam_warn_password_expiry(ctx
, user_info
, policy
,
1859 if (already_expired
== true) {
1861 SMB_TIME_T last_set
= user_info
->pass_last_set_time
;
1863 _pam_log_debug(ctx
, LOG_DEBUG
,
1864 "Password has expired "
1865 "(Password was last set: %lld, "
1866 "the policy says it should expire here "
1867 "%lld (now it's: %ld))\n",
1868 (long long int)last_set
,
1869 (long long int)last_set
+
1873 return PAM_AUTHTOK_EXPIRED
;
1877 ret
= PAM_NEW_AUTHTOK_REQD
;
1881 /* inform about logon type */
1882 _pam_warn_logon_type(ctx
, user
, user_info
->user_flags
);
1884 /* inform about krb5 failures */
1885 _pam_warn_krb5_failure(ctx
, user
, user_info
->user_flags
);
1887 /* set some info3 info for other modules in the stack */
1888 _pam_set_data_info3(ctx
, user_info
);
1890 /* put krb5ccname into env */
1891 _pam_setup_krb5_env(ctx
, info
);
1893 /* If winbindd returned a username, return the pointer to it
1895 _pam_setup_unix_username(ctx
, user_ret
, info
);
1899 wbcFreeMemory(logon
.blobs
);
1900 if (info
&& info
->blobs
&& !p_info
) {
1901 wbcFreeMemory(info
->blobs
);
1903 if (error
&& !p_error
) {
1904 wbcFreeMemory(error
);
1906 if (info
&& !p_info
) {
1907 wbcFreeMemory(info
);
1909 if (policy
&& !p_policy
) {
1910 wbcFreeMemory(policy
);
1916 /* talk to winbindd */
1917 static int winbind_chauthtok_request(struct pwb_context
*ctx
,
1919 const char *oldpass
,
1920 const char *newpass
,
1921 time_t pwd_last_set
)
1924 struct wbcChangePasswordParams params
;
1925 struct wbcAuthErrorInfo
*error
= NULL
;
1926 struct wbcUserPasswordPolicyInfo
*policy
= NULL
;
1927 enum wbcPasswordChangeRejectReason reject_reason
= -1;
1931 const char *codes
[] = {
1932 "NT_STATUS_BACKUP_CONTROLLER",
1933 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1934 "NT_STATUS_NO_LOGON_SERVERS",
1935 "NT_STATUS_ACCESS_DENIED",
1936 "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1937 "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1938 "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1940 int ret
= PAM_AUTH_ERR
;
1942 ZERO_STRUCT(params
);
1944 if (ctx
->ctrl
& WINBIND_KRB5_AUTH
) {
1945 flags
|= WBFLAG_PAM_KRB5
|
1946 WBFLAG_PAM_CONTACT_TRUSTDOM
;
1949 if (ctx
->ctrl
& WINBIND_CACHED_LOGIN
) {
1950 flags
|= WBFLAG_PAM_CACHED_LOGIN
;
1953 params
.account_name
= user
;
1954 params
.level
= WBC_AUTH_USER_LEVEL_PLAIN
;
1955 params
.old_password
.plaintext
= oldpass
;
1956 params
.new_password
.plaintext
= newpass
;
1957 params
.flags
= flags
;
1959 wbc_status
= wbcChangeUserPasswordEx(¶ms
, &error
, &reject_reason
, &policy
);
1960 ret
= wbc_auth_error_to_pam_error(ctx
, error
, wbc_status
,
1961 user
, "wbcChangeUserPasswordEx");
1963 if (WBC_ERROR_IS_OK(wbc_status
)) {
1964 _pam_log(ctx
, LOG_NOTICE
,
1965 "user '%s' password changed", user
);
1970 wbcFreeMemory(policy
);
1974 for (i
=0; i
<ARRAY_SIZE(codes
); i
++) {
1976 if (_pam_check_remark_auth_err(ctx
, error
, codes
[i
], &_ret
)) {
1982 if (!strcasecmp(error
->nt_string
,
1983 "NT_STATUS_PASSWORD_RESTRICTION")) {
1985 char *pwd_restriction_string
= NULL
;
1986 SMB_TIME_T min_pwd_age
= 0;
1989 min_pwd_age
= policy
->min_passwordage
;
1992 /* FIXME: avoid to send multiple PAM messages after another */
1993 switch (reject_reason
) {
1996 case WBC_PWD_CHANGE_NO_ERROR
:
1997 if ((min_pwd_age
> 0) &&
1998 (pwd_last_set
+ min_pwd_age
> time(NULL
))) {
1999 PAM_WB_REMARK_DIRECT(ctx
,
2000 "NT_STATUS_PWD_TOO_RECENT");
2003 case WBC_PWD_CHANGE_PASSWORD_TOO_SHORT
:
2004 PAM_WB_REMARK_DIRECT(ctx
,
2005 "NT_STATUS_PWD_TOO_SHORT");
2007 case WBC_PWD_CHANGE_PWD_IN_HISTORY
:
2008 PAM_WB_REMARK_DIRECT(ctx
,
2009 "NT_STATUS_PWD_HISTORY_CONFLICT");
2011 case WBC_PWD_CHANGE_NOT_COMPLEX
:
2012 _make_remark(ctx
, PAM_ERROR_MSG
,
2013 _("Password does not meet "
2014 "complexity requirements"));
2017 _pam_log_debug(ctx
, LOG_DEBUG
,
2018 "unknown password change "
2019 "reject reason: %d",
2024 pwd_restriction_string
=
2025 _pam_compose_pwd_restriction_string(ctx
, policy
);
2026 if (pwd_restriction_string
) {
2027 _make_remark(ctx
, PAM_ERROR_MSG
,
2028 pwd_restriction_string
);
2029 TALLOC_FREE(pwd_restriction_string
);
2033 wbcFreeMemory(error
);
2034 wbcFreeMemory(policy
);
2040 * Checks if a user has an account
2043 * 1 = User not found
2047 static int valid_user(struct pwb_context
*ctx
,
2050 /* check not only if the user is available over NSS calls, also make
2051 * sure it's really a winbind user, this is important when stacking PAM
2052 * modules in the 'account' or 'password' facility. */
2055 struct passwd
*pwd
= NULL
;
2056 struct passwd
*wb_pwd
= NULL
;
2058 pwd
= getpwnam(user
);
2063 wbc_status
= wbcGetpwnam(user
, &wb_pwd
);
2064 wbcFreeMemory(wb_pwd
);
2065 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2066 _pam_log(ctx
, LOG_DEBUG
, "valid_user: wbcGetpwnam gave %s\n",
2067 wbcErrorString(wbc_status
));
2070 switch (wbc_status
) {
2071 case WBC_ERR_UNKNOWN_USER
:
2072 /* match other insane libwbclient return codes */
2073 case WBC_ERR_WINBIND_NOT_AVAILABLE
:
2074 case WBC_ERR_DOMAIN_NOT_FOUND
:
2076 case WBC_ERR_SUCCESS
:
2084 static char *_pam_delete(register char *xx
)
2092 * obtain a password from the user
2095 static int _winbind_read_password(struct pwb_context
*ctx
,
2097 const char *comment
,
2098 const char *prompt1
,
2099 const char *prompt2
,
2107 _pam_log(ctx
, LOG_DEBUG
, "getting password (0x%08x)", ctrl
);
2110 * make sure nothing inappropriate gets returned
2113 *pass
= token
= NULL
;
2116 * which authentication token are we getting?
2119 if (on(WINBIND__OLD_PASSWORD
, ctrl
)) {
2120 authtok_flag
= PAM_OLDAUTHTOK
;
2122 authtok_flag
= PAM_AUTHTOK
;
2126 * should we obtain the password from a PAM item ?
2129 if (on(WINBIND_TRY_FIRST_PASS_ARG
, ctrl
) ||
2130 on(WINBIND_USE_FIRST_PASS_ARG
, ctrl
)) {
2131 retval
= _pam_get_item(ctx
->pamh
, authtok_flag
, &item
);
2132 if (retval
!= PAM_SUCCESS
) {
2134 _pam_log(ctx
, LOG_ALERT
,
2135 "pam_get_item returned error "
2136 "to unix-read-password");
2138 } else if (item
!= NULL
) { /* we have a password! */
2141 _pam_log(ctx
, LOG_DEBUG
,
2142 "pam_get_item returned a password");
2144 } else if (on(WINBIND_USE_FIRST_PASS_ARG
, ctrl
)) {
2145 return PAM_AUTHTOK_RECOVER_ERR
; /* didn't work */
2146 } else if (on(WINBIND_USE_AUTHTOK_ARG
, ctrl
)
2147 && off(WINBIND__OLD_PASSWORD
, ctrl
)) {
2148 return PAM_AUTHTOK_RECOVER_ERR
;
2152 * getting here implies we will have to get the password from the
2157 struct pam_message msg
[3], *pmsg
[3];
2158 struct pam_response
*resp
;
2161 /* prepare to converse */
2163 if (comment
!= NULL
&& off(ctrl
, WINBIND_SILENT
)) {
2165 msg
[0].msg_style
= PAM_TEXT_INFO
;
2166 msg
[0].msg
= discard_const_p(char, comment
);
2173 msg
[i
].msg_style
= PAM_PROMPT_ECHO_OFF
;
2174 msg
[i
++].msg
= discard_const_p(char, prompt1
);
2177 if (prompt2
!= NULL
) {
2179 msg
[i
].msg_style
= PAM_PROMPT_ECHO_OFF
;
2180 msg
[i
++].msg
= discard_const_p(char, prompt2
);
2183 /* so call the conversation expecting i responses */
2185 retval
= converse(ctx
->pamh
, i
, pmsg
, &resp
);
2187 if (retval
== PAM_SUCCESS
) {
2188 retval
= PAM_AUTHTOK_RECOVER_ERR
;
2192 if (retval
!= PAM_SUCCESS
) {
2193 _pam_drop_reply(resp
, i
);
2197 /* interpret the response */
2199 token
= x_strdup(resp
[i
- replies
].resp
);
2201 _pam_log(ctx
, LOG_NOTICE
,
2202 "could not recover "
2203 "authentication token");
2204 retval
= PAM_AUTHTOK_RECOVER_ERR
;
2209 /* verify that password entered correctly */
2210 if (!resp
[i
- 1].resp
||
2211 strcmp(token
, resp
[i
- 1].resp
)) {
2212 _pam_delete(token
); /* mistyped */
2213 retval
= PAM_AUTHTOK_RECOVER_ERR
;
2214 _make_remark(ctx
, PAM_ERROR_MSG
,
2220 * tidy up the conversation (resp_retcode) is ignored
2221 * -- what is it for anyway? AGM
2223 _pam_drop_reply(resp
, i
);
2227 if (retval
!= PAM_SUCCESS
) {
2228 _pam_log_debug(ctx
, LOG_DEBUG
,
2229 "unable to obtain a password");
2232 /* 'token' is the entered password */
2234 /* we store this password as an item */
2236 retval
= pam_set_item(ctx
->pamh
, authtok_flag
, token
);
2237 _pam_delete(token
); /* clean it up */
2238 if (retval
!= PAM_SUCCESS
||
2239 (retval
= _pam_get_item(ctx
->pamh
, authtok_flag
, &item
)) != PAM_SUCCESS
) {
2241 _pam_log(ctx
, LOG_CRIT
, "error manipulating password");
2247 item
= NULL
; /* break link to password */
2252 static const char *get_conf_item_string(struct pwb_context
*ctx
,
2257 const char *parm_opt
= NULL
;
2259 if (!(ctx
->ctrl
& config_flag
)) {
2263 /* let the pam opt take precedence over the pam_winbind.conf option */
2264 for (i
=0; i
<ctx
->argc
; i
++) {
2266 if ((strncmp(ctx
->argv
[i
], item
, strlen(item
)) == 0)) {
2269 if ((p
= strchr(ctx
->argv
[i
], '=')) == NULL
) {
2270 _pam_log(ctx
, LOG_INFO
,
2271 "no \"=\" delimiter for \"%s\" found\n",
2275 _pam_log_debug(ctx
, LOG_INFO
,
2276 "PAM config: %s '%s'\n", item
, p
+1);
2284 key
= talloc_asprintf(ctx
, "global:%s", item
);
2289 parm_opt
= iniparser_getstring(ctx
->dict
, key
, NULL
);
2292 _pam_log_debug(ctx
, LOG_INFO
, "CONFIG file: %s '%s'\n",
2299 static int get_config_item_int(struct pwb_context
*ctx
,
2303 int i
, parm_opt
= -1;
2305 if (!(ctx
->ctrl
& config_flag
)) {
2309 /* let the pam opt take precedence over the pam_winbind.conf option */
2310 for (i
= 0; i
< ctx
->argc
; i
++) {
2312 if ((strncmp(ctx
->argv
[i
], item
, strlen(item
)) == 0)) {
2315 if ((p
= strchr(ctx
->argv
[i
], '=')) == NULL
) {
2316 _pam_log(ctx
, LOG_INFO
,
2317 "no \"=\" delimiter for \"%s\" found\n",
2321 parm_opt
= atoi(p
+ 1);
2322 _pam_log_debug(ctx
, LOG_INFO
,
2323 "PAM config: %s '%d'\n",
2332 key
= talloc_asprintf(ctx
, "global:%s", item
);
2337 parm_opt
= iniparser_getint(ctx
->dict
, key
, -1);
2340 _pam_log_debug(ctx
, LOG_INFO
,
2341 "CONFIG file: %s '%d'\n",
2348 static const char *get_krb5_cc_type_from_config(struct pwb_context
*ctx
)
2350 return get_conf_item_string(ctx
, "krb5_ccache_type",
2351 WINBIND_KRB5_CCACHE_TYPE
);
2354 static const char *get_member_from_config(struct pwb_context
*ctx
)
2356 const char *ret
= NULL
;
2357 ret
= get_conf_item_string(ctx
, "require_membership_of",
2358 WINBIND_REQUIRED_MEMBERSHIP
);
2362 return get_conf_item_string(ctx
, "require-membership-of",
2363 WINBIND_REQUIRED_MEMBERSHIP
);
2366 static int get_warn_pwd_expire_from_config(struct pwb_context
*ctx
)
2369 ret
= get_config_item_int(ctx
, "warn_pwd_expire",
2370 WINBIND_WARN_PWD_EXPIRE
);
2371 /* no or broken setting */
2373 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES
;
2379 * Retrieve the winbind separator.
2381 * @param ctx PAM winbind context.
2383 * @return string separator character. NULL on failure.
2386 static char winbind_get_separator(struct pwb_context
*ctx
)
2389 static struct wbcInterfaceDetails
*details
= NULL
;
2391 wbc_status
= wbcInterfaceDetails(&details
);
2392 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2393 _pam_log(ctx
, LOG_ERR
,
2394 "Could not retrieve winbind interface details: %s",
2395 wbcErrorString(wbc_status
));
2403 return details
->winbind_separator
;
2408 * Convert a upn to a name.
2410 * @param ctx PAM winbind context.
2411 * @param upn USer UPN to be trabslated.
2413 * @return converted name. NULL pointer on failure. Caller needs to free.
2416 static char* winbind_upn_to_username(struct pwb_context
*ctx
,
2420 wbcErr wbc_status
= WBC_ERR_UNKNOWN_FAILURE
;
2421 struct wbcDomainSid sid
;
2422 enum wbcSidType type
;
2423 char *domain
= NULL
;
2427 /* This cannot work when the winbind separator = @ */
2429 sep
= winbind_get_separator(ctx
);
2430 if (!sep
|| sep
== '@') {
2434 name
= talloc_strdup(ctx
, upn
);
2438 if ((p
= strchr(name
, '@')) != NULL
) {
2443 /* Convert the UPN to a SID */
2445 wbc_status
= wbcLookupName(domain
, name
, &sid
, &type
);
2446 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2450 /* Convert the the SID back to the sAMAccountName */
2452 wbc_status
= wbcLookupSid(&sid
, &domain
, &name
, &type
);
2453 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2457 return talloc_asprintf(ctx
, "%s%c%s", domain
, sep
, name
);
2460 static int _pam_delete_cred(pam_handle_t
*pamh
, int flags
,
2461 int argc
, const char **argv
)
2463 int retval
= PAM_SUCCESS
;
2464 struct pwb_context
*ctx
= NULL
;
2465 struct wbcLogoffUserParams logoff
;
2466 struct wbcAuthErrorInfo
*error
= NULL
;
2468 wbcErr wbc_status
= WBC_ERR_SUCCESS
;
2470 ZERO_STRUCT(logoff
);
2472 retval
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2477 _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx
);
2479 if (ctx
->ctrl
& WINBIND_KRB5_AUTH
) {
2481 /* destroy the ccache here */
2483 uint32_t wbc_flags
= 0;
2484 const char *ccname
= NULL
;
2485 struct passwd
*pwd
= NULL
;
2487 retval
= pam_get_user(pamh
, &user
, _("Username: "));
2489 _pam_log(ctx
, LOG_ERR
,
2490 "could not identify user");
2495 _pam_log(ctx
, LOG_ERR
,
2496 "username was NULL!");
2497 retval
= PAM_USER_UNKNOWN
;
2501 _pam_log_debug(ctx
, LOG_DEBUG
,
2502 "username [%s] obtained", user
);
2504 ccname
= pam_getenv(pamh
, "KRB5CCNAME");
2505 if (ccname
== NULL
) {
2506 _pam_log_debug(ctx
, LOG_DEBUG
,
2507 "user has no KRB5CCNAME environment");
2510 pwd
= getpwnam(user
);
2512 retval
= PAM_USER_UNKNOWN
;
2516 wbc_flags
= WBFLAG_PAM_KRB5
|
2517 WBFLAG_PAM_CONTACT_TRUSTDOM
;
2519 logoff
.username
= user
;
2522 wbc_status
= wbcAddNamedBlob(&logoff
.num_blobs
,
2528 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2533 wbc_status
= wbcAddNamedBlob(&logoff
.num_blobs
,
2537 (uint8_t *)&wbc_flags
,
2539 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2543 wbc_status
= wbcAddNamedBlob(&logoff
.num_blobs
,
2547 (uint8_t *)&pwd
->pw_uid
,
2548 sizeof(pwd
->pw_uid
));
2549 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2553 wbc_status
= wbcLogoffUserEx(&logoff
, &error
);
2554 retval
= wbc_auth_error_to_pam_error(ctx
, error
, wbc_status
,
2555 user
, "wbcLogoffUser");
2556 wbcFreeMemory(error
);
2557 wbcFreeMemory(logoff
.blobs
);
2558 logoff
.blobs
= NULL
;
2560 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2561 _pam_log(ctx
, LOG_INFO
,
2562 "failed to logoff user %s: %s\n",
2563 user
, wbcErrorString(wbc_status
));
2569 wbcFreeMemory(logoff
.blobs
);
2572 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2573 retval
= wbc_auth_error_to_pam_error(ctx
, error
, wbc_status
,
2574 user
, "wbcLogoffUser");
2578 * Delete the krb5 ccname variable from the PAM environment
2579 * if it was set by winbind.
2581 if ((ctx
->ctrl
& WINBIND_KRB5_AUTH
) && pam_getenv(pamh
, "KRB5CCNAME")) {
2582 pam_putenv(pamh
, "KRB5CCNAME");
2585 _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx
, retval
);
2593 int pam_sm_authenticate(pam_handle_t
*pamh
, int flags
,
2594 int argc
, const char **argv
)
2596 const char *username
;
2597 const char *password
;
2598 const char *member
= NULL
;
2599 const char *cctype
= NULL
;
2600 int warn_pwd_expire
;
2601 int retval
= PAM_AUTH_ERR
;
2602 char *username_ret
= NULL
;
2603 char *new_authtok_required
= NULL
;
2604 char *real_username
= NULL
;
2605 struct pwb_context
*ctx
= NULL
;
2607 retval
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2612 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx
);
2614 /* Get the username */
2615 retval
= pam_get_user(pamh
, &username
, NULL
);
2616 if ((retval
!= PAM_SUCCESS
) || (!username
)) {
2617 _pam_log_debug(ctx
, LOG_DEBUG
,
2618 "can not get the username");
2619 retval
= PAM_SERVICE_ERR
;
2625 /* Decode the user name since AIX does not support logn user
2626 names by default. The name is encoded as _#uid. */
2628 if (username
[0] == '_') {
2629 uid_t id
= atoi(&username
[1]);
2630 struct passwd
*pw
= NULL
;
2632 if ((id
!=0) && ((pw
= getpwuid(id
)) != NULL
)) {
2633 real_username
= strdup(pw
->pw_name
);
2638 if (!real_username
) {
2639 /* Just making a copy of the username we got from PAM */
2640 if ((real_username
= strdup(username
)) == NULL
) {
2641 _pam_log_debug(ctx
, LOG_DEBUG
,
2642 "memory allocation failure when copying "
2644 retval
= PAM_SERVICE_ERR
;
2649 /* Maybe this was a UPN */
2651 if (strchr(real_username
, '@') != NULL
) {
2652 char *samaccountname
= NULL
;
2654 samaccountname
= winbind_upn_to_username(ctx
,
2656 if (samaccountname
) {
2657 free(real_username
);
2658 real_username
= strdup(samaccountname
);
2662 retval
= _winbind_read_password(ctx
, ctx
->ctrl
, NULL
,
2663 _("Password: "), NULL
,
2666 if (retval
!= PAM_SUCCESS
) {
2667 _pam_log(ctx
, LOG_ERR
,
2668 "Could not retrieve user's password");
2669 retval
= PAM_AUTHTOK_ERR
;
2673 /* Let's not give too much away in the log file */
2675 #ifdef DEBUG_PASSWORD
2676 _pam_log_debug(ctx
, LOG_INFO
,
2677 "Verify user '%s' with password '%s'",
2678 real_username
, password
);
2680 _pam_log_debug(ctx
, LOG_INFO
,
2681 "Verify user '%s'", real_username
);
2684 member
= get_member_from_config(ctx
);
2685 cctype
= get_krb5_cc_type_from_config(ctx
);
2686 warn_pwd_expire
= get_warn_pwd_expire_from_config(ctx
);
2688 /* Now use the username to look up password */
2689 retval
= winbind_auth_request(ctx
, real_username
, password
,
2690 member
, cctype
, warn_pwd_expire
,
2692 NULL
, &username_ret
);
2694 if (retval
== PAM_NEW_AUTHTOK_REQD
||
2695 retval
== PAM_AUTHTOK_EXPIRED
) {
2697 char *new_authtok_required_during_auth
= NULL
;
2699 new_authtok_required
= talloc_asprintf(NULL
, "%d", retval
);
2700 if (!new_authtok_required
) {
2701 retval
= PAM_BUF_ERR
;
2705 pam_set_data(pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD
,
2706 new_authtok_required
,
2707 _pam_winbind_cleanup_func
);
2709 retval
= PAM_SUCCESS
;
2711 new_authtok_required_during_auth
= talloc_asprintf(NULL
, "%d", true);
2712 if (!new_authtok_required_during_auth
) {
2713 retval
= PAM_BUF_ERR
;
2717 pam_set_data(pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH
,
2718 new_authtok_required_during_auth
,
2719 _pam_winbind_cleanup_func
);
2726 pam_set_item (pamh
, PAM_USER
, username_ret
);
2727 _pam_log_debug(ctx
, LOG_INFO
,
2728 "Returned user was '%s'", username_ret
);
2732 if (real_username
) {
2733 free(real_username
);
2736 if (!new_authtok_required
) {
2737 pam_set_data(pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD
, NULL
, NULL
);
2740 if (retval
!= PAM_SUCCESS
) {
2741 _pam_free_data_info3(pamh
);
2745 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx
, retval
);
2753 int pam_sm_setcred(pam_handle_t
*pamh
, int flags
,
2754 int argc
, const char **argv
)
2756 int ret
= PAM_SYSTEM_ERR
;
2757 struct pwb_context
*ctx
= NULL
;
2759 ret
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2764 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx
);
2766 switch (flags
& ~PAM_SILENT
) {
2768 case PAM_DELETE_CRED
:
2769 ret
= _pam_delete_cred(pamh
, flags
, argc
, argv
);
2771 case PAM_REFRESH_CRED
:
2772 _pam_log_debug(ctx
, LOG_WARNING
,
2773 "PAM_REFRESH_CRED not implemented");
2776 case PAM_REINITIALIZE_CRED
:
2777 _pam_log_debug(ctx
, LOG_WARNING
,
2778 "PAM_REINITIALIZE_CRED not implemented");
2781 case PAM_ESTABLISH_CRED
:
2782 _pam_log_debug(ctx
, LOG_WARNING
,
2783 "PAM_ESTABLISH_CRED not implemented");
2787 ret
= PAM_SYSTEM_ERR
;
2793 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx
, ret
);
2801 * Account management. We want to verify that the account exists
2802 * before returning PAM_SUCCESS
2805 int pam_sm_acct_mgmt(pam_handle_t
*pamh
, int flags
,
2806 int argc
, const char **argv
)
2808 const char *username
;
2809 int ret
= PAM_USER_UNKNOWN
;
2811 struct pwb_context
*ctx
= NULL
;
2813 ret
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2818 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx
);
2821 /* Get the username */
2822 ret
= pam_get_user(pamh
, &username
, NULL
);
2823 if ((ret
!= PAM_SUCCESS
) || (!username
)) {
2824 _pam_log_debug(ctx
, LOG_DEBUG
,
2825 "can not get the username");
2826 ret
= PAM_SERVICE_ERR
;
2830 /* Verify the username */
2831 ret
= valid_user(ctx
, username
);
2834 /* some sort of system error. The log was already printed */
2835 ret
= PAM_SERVICE_ERR
;
2838 /* the user does not exist */
2839 _pam_log_debug(ctx
, LOG_NOTICE
, "user '%s' not found",
2841 if (ctx
->ctrl
& WINBIND_UNKNOWN_OK_ARG
) {
2845 ret
= PAM_USER_UNKNOWN
;
2848 pam_get_data(pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD
,
2849 (const void **)&tmp
);
2851 ret
= atoi((const char *)tmp
);
2853 case PAM_AUTHTOK_EXPIRED
:
2854 /* fall through, since new token is required in this case */
2855 case PAM_NEW_AUTHTOK_REQD
:
2856 _pam_log(ctx
, LOG_WARNING
,
2857 "pam_sm_acct_mgmt success but %s is set",
2858 PAM_WINBIND_NEW_AUTHTOK_REQD
);
2859 _pam_log(ctx
, LOG_NOTICE
,
2860 "user '%s' needs new password",
2862 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2863 ret
= PAM_NEW_AUTHTOK_REQD
;
2866 _pam_log(ctx
, LOG_WARNING
,
2867 "pam_sm_acct_mgmt success");
2868 _pam_log(ctx
, LOG_NOTICE
,
2869 "user '%s' granted access", username
);
2875 /* Otherwise, the authentication looked good */
2876 _pam_log(ctx
, LOG_NOTICE
,
2877 "user '%s' granted access", username
);
2881 /* we don't know anything about this return value */
2882 _pam_log(ctx
, LOG_ERR
,
2883 "internal module error (ret = %d, user = '%s')",
2885 ret
= PAM_SERVICE_ERR
;
2889 /* should not be reached */
2894 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx
, ret
);
2902 int pam_sm_open_session(pam_handle_t
*pamh
, int flags
,
2903 int argc
, const char **argv
)
2905 int ret
= PAM_SUCCESS
;
2906 struct pwb_context
*ctx
= NULL
;
2908 ret
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2913 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx
);
2915 if (ctx
->ctrl
& WINBIND_MKHOMEDIR
) {
2916 /* check and create homedir */
2917 ret
= _pam_mkhomedir(ctx
);
2920 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx
, ret
);
2928 int pam_sm_close_session(pam_handle_t
*pamh
, int flags
,
2929 int argc
, const char **argv
)
2931 int ret
= PAM_SUCCESS
;
2932 struct pwb_context
*ctx
= NULL
;
2934 ret
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2939 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx
);
2942 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx
, ret
);
2950 * evaluate whether we need to re-authenticate with kerberos after a
2953 * @param ctx PAM winbind context.
2954 * @param user The username
2956 * @return boolean Returns true if required, false if not.
2959 static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context
*ctx
,
2963 /* Make sure that we only do this if a) the chauthtok got initiated
2964 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2965 * later password change via the "passwd" command if done by the user
2967 * NB. If we login from gdm or xdm and the password expires,
2968 * we change the password, but there is no memory cache.
2969 * Thus, even for passthrough login, we should do the
2970 * authentication again to update memory cache.
2974 char *new_authtok_reqd_during_auth
= NULL
;
2975 struct passwd
*pwd
= NULL
;
2977 _pam_get_data(ctx
->pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH
,
2978 &new_authtok_reqd_during_auth
);
2979 pam_set_data(ctx
->pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH
,
2982 if (new_authtok_reqd_during_auth
) {
2986 pwd
= getpwnam(user
);
2991 if (getuid() == pwd
->pw_uid
) {
3000 int pam_sm_chauthtok(pam_handle_t
* pamh
, int flags
,
3001 int argc
, const char **argv
)
3005 bool cached_login
= false;
3007 /* <DO NOT free() THESE> */
3009 char *pass_old
, *pass_new
;
3010 /* </DO NOT free() THESE> */
3015 char *username_ret
= NULL
;
3016 struct wbcAuthErrorInfo
*error
= NULL
;
3017 struct pwb_context
*ctx
= NULL
;
3019 ret
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
3024 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx
);
3026 cached_login
= (ctx
->ctrl
& WINBIND_CACHED_LOGIN
);
3028 /* clearing offline bit for auth */
3029 ctx
->ctrl
&= ~WINBIND_CACHED_LOGIN
;
3032 * First get the name of a user
3034 ret
= pam_get_user(pamh
, &user
, _("Username: "));
3036 _pam_log(ctx
, LOG_ERR
,
3037 "password - could not identify user");
3042 _pam_log(ctx
, LOG_ERR
, "username was NULL!");
3043 ret
= PAM_USER_UNKNOWN
;
3047 _pam_log_debug(ctx
, LOG_DEBUG
, "username [%s] obtained", user
);
3049 /* check if this is really a user in winbindd, not only in NSS */
3050 ret
= valid_user(ctx
, user
);
3053 ret
= PAM_USER_UNKNOWN
;
3056 ret
= PAM_SYSTEM_ERR
;
3063 * obtain and verify the current password (OLDAUTHTOK) for
3067 if (flags
& PAM_PRELIM_CHECK
) {
3068 time_t pwdlastset_prelim
= 0;
3070 /* instruct user what is happening */
3072 #define greeting _("Changing password for")
3073 Announce
= talloc_asprintf(ctx
, "%s %s", greeting
, user
);
3075 _pam_log(ctx
, LOG_CRIT
,
3076 "password - out of memory");
3082 lctrl
= ctx
->ctrl
| WINBIND__OLD_PASSWORD
;
3083 ret
= _winbind_read_password(ctx
, lctrl
,
3085 _("(current) NT password: "),
3087 (const char **) &pass_old
);
3088 TALLOC_FREE(Announce
);
3089 if (ret
!= PAM_SUCCESS
) {
3090 _pam_log(ctx
, LOG_NOTICE
,
3091 "password - (old) token not obtained");
3095 /* verify that this is the password for this user */
3097 ret
= winbind_auth_request(ctx
, user
, pass_old
,
3100 &pwdlastset_prelim
, NULL
);
3102 if (ret
!= PAM_ACCT_EXPIRED
&&
3103 ret
!= PAM_AUTHTOK_EXPIRED
&&
3104 ret
!= PAM_NEW_AUTHTOK_REQD
&&
3105 ret
!= PAM_SUCCESS
) {
3110 pam_set_data(pamh
, PAM_WINBIND_PWD_LAST_SET
,
3111 (void *)pwdlastset_prelim
, NULL
);
3113 ret
= pam_set_item(pamh
, PAM_OLDAUTHTOK
,
3114 (const void *) pass_old
);
3116 if (ret
!= PAM_SUCCESS
) {
3117 _pam_log(ctx
, LOG_CRIT
,
3118 "failed to set PAM_OLDAUTHTOK");
3120 } else if (flags
& PAM_UPDATE_AUTHTOK
) {
3122 time_t pwdlastset_update
= 0;
3125 * obtain the proposed password
3129 * get the old token back.
3132 ret
= _pam_get_item(pamh
, PAM_OLDAUTHTOK
, &pass_old
);
3134 if (ret
!= PAM_SUCCESS
) {
3135 _pam_log(ctx
, LOG_NOTICE
,
3136 "user not authenticated");
3140 lctrl
= ctx
->ctrl
& ~WINBIND_TRY_FIRST_PASS_ARG
;
3142 if (on(WINBIND_USE_AUTHTOK_ARG
, lctrl
)) {
3143 lctrl
|= WINBIND_USE_FIRST_PASS_ARG
;
3146 ret
= PAM_AUTHTOK_ERR
;
3147 while ((ret
!= PAM_SUCCESS
) && (retry
++ < MAX_PASSWD_TRIES
)) {
3149 * use_authtok is to force the use of a previously entered
3150 * password -- needed for pluggable password strength checking
3153 ret
= _winbind_read_password(ctx
, lctrl
,
3155 _("Enter new NT password: "),
3156 _("Retype new NT password: "),
3157 (const char **)&pass_new
);
3159 if (ret
!= PAM_SUCCESS
) {
3160 _pam_log_debug(ctx
, LOG_ALERT
,
3162 "new password not obtained");
3163 pass_old
= NULL
;/* tidy up */
3168 * At this point we know who the user is and what they
3169 * propose as their new password. Verify that the new
3170 * password is acceptable.
3173 if (pass_new
[0] == '\0') {/* "\0" password = NULL */
3179 * By reaching here we have approved the passwords and must now
3180 * rebuild the password database file.
3182 _pam_get_data(pamh
, PAM_WINBIND_PWD_LAST_SET
,
3183 &pwdlastset_update
);
3186 * if cached creds were enabled, make sure to set the
3187 * WINBIND_CACHED_LOGIN bit here in order to have winbindd
3188 * update the cached creds storage - gd
3191 ctx
->ctrl
|= WINBIND_CACHED_LOGIN
;
3194 ret
= winbind_chauthtok_request(ctx
, user
, pass_old
,
3195 pass_new
, pwdlastset_update
);
3197 pass_old
= pass_new
= NULL
;
3201 if (_pam_require_krb5_auth_after_chauthtok(ctx
, user
)) {
3203 const char *member
= NULL
;
3204 const char *cctype
= NULL
;
3205 int warn_pwd_expire
;
3206 struct wbcLogonUserInfo
*info
= NULL
;
3207 struct wbcUserPasswordPolicyInfo
*policy
= NULL
;
3209 member
= get_member_from_config(ctx
);
3210 cctype
= get_krb5_cc_type_from_config(ctx
);
3211 warn_pwd_expire
= get_warn_pwd_expire_from_config(ctx
);
3213 /* Keep WINBIND_CACHED_LOGIN bit for
3214 * authentication after changing the password.
3215 * This will update the cached credentials in case
3216 * that winbindd_dual_pam_chauthtok() fails
3221 ret
= winbind_auth_request(ctx
, user
, pass_new
,
3223 &error
, &info
, &policy
,
3224 NULL
, &username_ret
);
3225 pass_old
= pass_new
= NULL
;
3227 if (ret
== PAM_SUCCESS
) {
3229 struct wbcAuthUserInfo
*user_info
= NULL
;
3231 if (info
&& info
->info
) {
3232 user_info
= info
->info
;
3235 /* warn a user if the password is about to
3237 _pam_warn_password_expiry(ctx
, user_info
, policy
,
3241 /* set some info3 info for other modules in the
3243 _pam_set_data_info3(ctx
, user_info
);
3245 /* put krb5ccname into env */
3246 _pam_setup_krb5_env(ctx
, info
);
3249 pam_set_item(pamh
, PAM_USER
,
3251 _pam_log_debug(ctx
, LOG_INFO
,
3252 "Returned user was '%s'",
3259 if (info
&& info
->blobs
) {
3260 wbcFreeMemory(info
->blobs
);
3262 wbcFreeMemory(info
);
3263 wbcFreeMemory(policy
);
3268 ret
= PAM_SERVICE_ERR
;
3273 /* Deal with offline errors. */
3275 const char *codes
[] = {
3276 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3277 "NT_STATUS_NO_LOGON_SERVERS",
3278 "NT_STATUS_ACCESS_DENIED"
3281 for (i
=0; i
<ARRAY_SIZE(codes
); i
++) {
3283 if (_pam_check_remark_auth_err(ctx
, error
, codes
[i
], &_ret
)) {
3289 wbcFreeMemory(error
);
3291 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx
, ret
);
3300 /* static module data */
3302 struct pam_module _pam_winbind_modstruct
= {
3304 pam_sm_authenticate
,
3307 pam_sm_open_session
,
3308 pam_sm_close_session
,
3315 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3316 * Copyright (c) Tim Potter <tpot@samba.org> 2000
3317 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3318 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3319 * Copyright (c) Jan Rêkorajski 1999.
3320 * Copyright (c) Andrew G. Morgan 1996-8.
3321 * Copyright (c) Alex O. Yuriev, 1996.
3322 * Copyright (c) Cristian Gafton 1996.
3323 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3325 * Redistribution and use in source and binary forms, with or without
3326 * modification, are permitted provided that the following conditions
3328 * 1. Redistributions of source code must retain the above copyright
3329 * notice, and the entire permission notice in its entirety,
3330 * including the disclaimer of warranties.
3331 * 2. Redistributions in binary form must reproduce the above copyright
3332 * notice, this list of conditions and the following disclaimer in the
3333 * documentation and/or other materials provided with the distribution.
3334 * 3. The name of the author may not be used to endorse or promote
3335 * products derived from this software without specific prior
3336 * written permission.
3338 * ALTERNATIVELY, this product may be distributed under the terms of
3339 * the GNU Public License, in which case the provisions of the GPL are
3340 * required INSTEAD OF the above restrictions. (This clause is
3341 * necessary due to a potential bad interaction between the GPL and
3342 * the restrictions contained in a BSD-style copyright.)
3344 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3345 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3346 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3347 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3348 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3349 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3350 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3351 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3352 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3353 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3354 * OF THE POSSIBILITY OF SUCH DAMAGE.