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
;
456 /* step through arguments */
457 for (i
=argc
,v
=argv
; i
-- > 0; ++v
) {
459 /* generic options */
460 if (!strcmp(*v
,"debug"))
461 ctrl
|= WINBIND_DEBUG_ARG
;
462 else if (!strcasecmp(*v
, "debug_state"))
463 ctrl
|= WINBIND_DEBUG_STATE
;
464 else if (!strcasecmp(*v
, "silent"))
465 ctrl
|= WINBIND_SILENT
;
466 else if (!strcasecmp(*v
, "use_authtok"))
467 ctrl
|= WINBIND_USE_AUTHTOK_ARG
;
468 else if (!strcasecmp(*v
, "use_first_pass"))
469 ctrl
|= WINBIND_USE_FIRST_PASS_ARG
;
470 else if (!strcasecmp(*v
, "try_first_pass"))
471 ctrl
|= WINBIND_TRY_FIRST_PASS_ARG
;
472 else if (!strcasecmp(*v
, "unknown_ok"))
473 ctrl
|= WINBIND_UNKNOWN_OK_ARG
;
474 else if (!strncasecmp(*v
, "require_membership_of",
475 strlen("require_membership_of")))
476 ctrl
|= WINBIND_REQUIRED_MEMBERSHIP
;
477 else if (!strncasecmp(*v
, "require-membership-of",
478 strlen("require-membership-of")))
479 ctrl
|= WINBIND_REQUIRED_MEMBERSHIP
;
480 else if (!strcasecmp(*v
, "krb5_auth"))
481 ctrl
|= WINBIND_KRB5_AUTH
;
482 else if (!strncasecmp(*v
, "krb5_ccache_type",
483 strlen("krb5_ccache_type")))
484 ctrl
|= WINBIND_KRB5_CCACHE_TYPE
;
485 else if (!strcasecmp(*v
, "cached_login"))
486 ctrl
|= WINBIND_CACHED_LOGIN
;
488 __pam_log(pamh
, ctrl
, LOG_ERR
,
489 "pam_parse: unknown option: %s", *v
);
499 iniparser_freedict(d
);
506 static int _pam_winbind_free_context(struct pwb_context
*ctx
)
513 iniparser_freedict(ctx
->dict
);
519 static int _pam_winbind_init_context(pam_handle_t
*pamh
,
523 struct pwb_context
**ctx_p
)
525 struct pwb_context
*r
= NULL
;
531 r
= TALLOC_ZERO_P(NULL
, struct pwb_context
);
536 talloc_set_destructor(r
, _pam_winbind_free_context
);
542 r
->ctrl
= _pam_parse(pamh
, flags
, argc
, argv
, &r
->dict
);
545 return PAM_SYSTEM_ERR
;
553 static void _pam_winbind_cleanup_func(pam_handle_t
*pamh
,
557 int ctrl
= _pam_parse(pamh
, 0, 0, NULL
, NULL
);
558 if (_pam_log_is_debug_state_enabled(ctrl
)) {
559 __pam_log_debug(pamh
, ctrl
, LOG_DEBUG
,
560 "[pamh: %p] CLEAN: cleaning up PAM data %p "
561 "(error_status = %d)", pamh
, data
,
568 static const struct ntstatus_errors
{
569 const char *ntstatus_string
;
570 const char *error_string
;
571 } ntstatus_errors
[] = {
574 {"NT_STATUS_BACKUP_CONTROLLER",
575 N_("No primary Domain Controler available")},
576 {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
577 N_("No domain controllers found")},
578 {"NT_STATUS_NO_LOGON_SERVERS",
579 N_("No logon servers")},
580 {"NT_STATUS_PWD_TOO_SHORT",
581 N_("Password too short")},
582 {"NT_STATUS_PWD_TOO_RECENT",
583 N_("The password of this user is too recent to change")},
584 {"NT_STATUS_PWD_HISTORY_CONFLICT",
585 N_("Password is already in password history")},
586 {"NT_STATUS_PASSWORD_EXPIRED",
587 N_("Your password has expired")},
588 {"NT_STATUS_PASSWORD_MUST_CHANGE",
589 N_("You need to change your password now")},
590 {"NT_STATUS_INVALID_WORKSTATION",
591 N_("You are not allowed to logon from this workstation")},
592 {"NT_STATUS_INVALID_LOGON_HOURS",
593 N_("You are not allowed to logon at this time")},
594 {"NT_STATUS_ACCOUNT_EXPIRED",
595 N_("Your account has expired. "
596 "Please contact your System administrator")}, /* SCNR */
597 {"NT_STATUS_ACCOUNT_DISABLED",
598 N_("Your account is disabled. "
599 "Please contact your System administrator")}, /* SCNR */
600 {"NT_STATUS_ACCOUNT_LOCKED_OUT",
601 N_("Your account has been locked. "
602 "Please contact your System administrator")}, /* SCNR */
603 {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
604 N_("Invalid Trust Account")},
605 {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
606 N_("Invalid Trust Account")},
607 {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
608 N_("Invalid Trust Account")},
609 {"NT_STATUS_ACCESS_DENIED",
610 N_("Access is denied")},
614 static const char *_get_ntstatus_error_string(const char *nt_status_string
)
617 for (i
=0; ntstatus_errors
[i
].ntstatus_string
!= NULL
; i
++) {
618 if (!strcasecmp(ntstatus_errors
[i
].ntstatus_string
,
620 return _(ntstatus_errors
[i
].error_string
);
626 /* --- authentication management functions --- */
628 /* Attempt a conversation */
630 static int converse(const pam_handle_t
*pamh
,
632 struct pam_message
**message
,
633 struct pam_response
**response
)
636 struct pam_conv
*conv
;
638 retval
= _pam_get_item(pamh
, PAM_CONV
, &conv
);
639 if (retval
== PAM_SUCCESS
) {
640 retval
= conv
->conv(nargs
,
641 (const struct pam_message
**)message
,
642 response
, conv
->appdata_ptr
);
645 return retval
; /* propagate error status */
649 static int _make_remark(struct pwb_context
*ctx
,
653 int retval
= PAM_SUCCESS
;
655 struct pam_message
*pmsg
[1], msg
[1];
656 struct pam_response
*resp
;
658 if (ctx
->flags
& WINBIND_SILENT
) {
663 msg
[0].msg
= discard_const_p(char, text
);
664 msg
[0].msg_style
= type
;
667 retval
= converse(ctx
->pamh
, 1, pmsg
, &resp
);
670 _pam_drop_reply(resp
, 1);
675 static int _make_remark_v(struct pwb_context
*ctx
,
683 ret
= vasprintf(&var
, format
, args
);
685 _pam_log(ctx
, LOG_ERR
, "memory allocation failure");
689 ret
= _make_remark(ctx
, type
, var
);
694 static int _make_remark_format(struct pwb_context
*ctx
, int type
, const char *format
, ...) PRINTF_ATTRIBUTE(3,4);
695 static int _make_remark_format(struct pwb_context
*ctx
, int type
, const char *format
, ...)
700 va_start(args
, format
);
701 ret
= _make_remark_v(ctx
, type
, format
, args
);
706 static int pam_winbind_request(struct pwb_context
*ctx
,
707 enum winbindd_cmd req_type
,
708 struct winbindd_request
*request
,
709 struct winbindd_response
*response
)
711 /* Fill in request and send down pipe */
712 winbindd_init_request(request
, req_type
);
714 if (winbind_write_sock(request
, sizeof(*request
), 0, 0) == -1) {
715 _pam_log(ctx
, LOG_ERR
,
716 "pam_winbind_request: write to socket failed!");
717 winbind_close_sock();
718 return PAM_SERVICE_ERR
;
722 if (winbindd_read_reply(response
) == -1) {
723 _pam_log(ctx
, LOG_ERR
,
724 "pam_winbind_request: read from socket failed!");
725 winbind_close_sock();
726 return PAM_SERVICE_ERR
;
729 /* We are done with the socket - close it and avoid mischeif */
730 winbind_close_sock();
732 /* Copy reply data from socket */
733 if (response
->result
== WINBINDD_OK
) {
737 if (response
->data
.auth
.pam_error
!= PAM_SUCCESS
) {
738 _pam_log(ctx
, LOG_ERR
,
739 "request failed: %s, "
740 "PAM error was %s (%d), NT error was %s",
741 response
->data
.auth
.error_string
,
742 pam_strerror(ctx
->pamh
, response
->data
.auth
.pam_error
),
743 response
->data
.auth
.pam_error
,
744 response
->data
.auth
.nt_status_string
);
745 return response
->data
.auth
.pam_error
;
748 _pam_log(ctx
, LOG_ERR
, "request failed, but PAM error 0!");
750 return PAM_SERVICE_ERR
;
753 static int pam_winbind_request_log(struct pwb_context
*ctx
,
759 /* incorrect password */
760 _pam_log(ctx
, LOG_WARNING
, "user '%s' denied access "
761 "(incorrect password or invalid membership)", user
);
763 case PAM_ACCT_EXPIRED
:
764 /* account expired */
765 _pam_log(ctx
, LOG_WARNING
, "user '%s' account expired",
768 case PAM_AUTHTOK_EXPIRED
:
769 /* password expired */
770 _pam_log(ctx
, LOG_WARNING
, "user '%s' password expired",
773 case PAM_NEW_AUTHTOK_REQD
:
774 /* new password required */
775 _pam_log(ctx
, LOG_WARNING
, "user '%s' new password "
778 case PAM_USER_UNKNOWN
:
779 /* the user does not exist */
780 _pam_log_debug(ctx
, LOG_NOTICE
, "user '%s' not found",
782 if (ctx
->ctrl
& WINBIND_UNKNOWN_OK_ARG
) {
787 /* Otherwise, the authentication looked good */
790 case WINBINDD_PAM_AUTH
:
791 _pam_log(ctx
, LOG_NOTICE
,
792 "user '%s' granted access", user
);
795 _pam_log(ctx
, LOG_NOTICE
,
796 "user '%s' OK", user
);
802 /* we don't know anything about this return value */
803 _pam_log(ctx
, LOG_ERR
,
804 "internal module error (retval = %d, user = '%s')",
810 static int wbc_auth_error_to_pam_error(struct pwb_context
*ctx
,
811 struct wbcAuthErrorInfo
*e
,
813 const char *username
,
816 int ret
= PAM_AUTH_ERR
;
818 if (WBC_ERROR_IS_OK(status
)) {
819 _pam_log_debug(ctx
, LOG_DEBUG
, "request %s succeeded",
822 return pam_winbind_request_log(ctx
, ret
, username
);
826 if (e
->pam_error
!= PAM_SUCCESS
) {
827 _pam_log(ctx
, LOG_ERR
,
828 "request %s failed: %s, "
829 "PAM error: %s (%d), NTSTATUS: %s, "
830 "Error message was: %s",
832 wbcErrorString(status
),
833 _pam_error_code_str(e
->pam_error
),
838 return pam_winbind_request_log(ctx
, ret
, username
);
841 _pam_log(ctx
, LOG_ERR
, "request %s failed, but PAM error 0!", fn
);
843 ret
= PAM_SERVICE_ERR
;
844 return pam_winbind_request_log(ctx
, ret
, username
);
847 ret
= wbc_error_to_pam_error(status
);
848 return pam_winbind_request_log(ctx
, ret
, username
);
853 * send a password expiry message if required
855 * @param ctx PAM winbind context.
856 * @param next_change expected (calculated) next expiry date.
857 * @param already_expired pointer to a boolean to indicate if the password is
860 * @return boolean Returns true if message has been sent, false if not.
863 static bool _pam_send_password_expiry_message(struct pwb_context
*ctx
,
867 bool *already_expired
)
870 struct tm tm_now
, tm_next_change
;
872 if (already_expired
) {
873 *already_expired
= false;
876 if (next_change
<= now
) {
877 PAM_WB_REMARK_DIRECT(ctx
, "NT_STATUS_PASSWORD_EXPIRED");
878 if (already_expired
) {
879 *already_expired
= true;
884 if ((next_change
< 0) ||
885 (next_change
> now
+ warn_pwd_expire
* SECONDS_PER_DAY
)) {
889 if ((localtime_r(&now
, &tm_now
) == NULL
) ||
890 (localtime_r(&next_change
, &tm_next_change
) == NULL
)) {
894 days
= (tm_next_change
.tm_yday
+tm_next_change
.tm_year
*365) -
895 (tm_now
.tm_yday
+tm_now
.tm_year
*365);
898 _make_remark(ctx
, PAM_TEXT_INFO
,
899 _("Your password expires today"));
903 if (days
> 0 && days
< warn_pwd_expire
) {
904 _make_remark_format(ctx
, PAM_TEXT_INFO
,
905 _("Your password will expire in %d %s"),
906 days
, (days
> 1) ? _("days"):_("day"));
914 * Send a warning if the password expires in the near future
916 * @param ctx PAM winbind context.
917 * @param response The full authentication response structure.
918 * @param already_expired boolean, is the pwd already expired?
923 static void _pam_warn_password_expiry(struct pwb_context
*ctx
,
924 const struct winbindd_response
*response
,
926 bool *already_expired
)
928 time_t now
= time(NULL
);
929 time_t next_change
= 0;
931 if (already_expired
) {
932 *already_expired
= false;
935 /* accounts with ACB_PWNOEXP set never receive a warning */
936 if (response
->data
.auth
.info3
.acct_flags
& ACB_PWNOEXP
) {
940 /* no point in sending a warning if this is a grace logon */
941 if (PAM_WB_GRACE_LOGON(response
->data
.auth
.info3
.user_flgs
)) {
945 /* check if the info3 must change timestamp has been set */
946 next_change
= response
->data
.auth
.info3
.pass_must_change_time
;
948 if (_pam_send_password_expiry_message(ctx
, next_change
, now
,
954 /* now check for the global password policy */
955 /* good catch from Ralf Haferkamp: an expiry of "never" is translated
957 if (response
->data
.auth
.policy
.expire
<= 0) {
961 next_change
= response
->data
.auth
.info3
.pass_last_set_time
+
962 response
->data
.auth
.policy
.expire
;
964 if (_pam_send_password_expiry_message(ctx
, next_change
, now
,
970 /* no warning sent */
973 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
976 * Append a string, making sure not to overflow and to always return a
977 * NULL-terminated string.
979 * @param dest Destination string buffer (must already be NULL-terminated).
980 * @param src Source string buffer.
981 * @param dest_buffer_size Size of dest buffer in bytes.
983 * @return false if dest buffer is not big enough (no bytes copied), true on
987 static bool safe_append_string(char *dest
,
989 int dest_buffer_size
)
991 int dest_length
= strlen(dest
);
992 int src_length
= strlen(src
);
994 if (dest_length
+ src_length
+ 1 > dest_buffer_size
) {
998 memcpy(dest
+ dest_length
, src
, src_length
+ 1);
1003 * Convert a names into a SID string, appending it to a buffer.
1005 * @param ctx PAM winbind context.
1006 * @param user User in PAM request.
1007 * @param name Name to convert.
1008 * @param sid_list_buffer Where to append the string sid.
1009 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1011 * @return false on failure, true on success.
1013 static bool winbind_name_to_sid_string(struct pwb_context
*ctx
,
1016 char *sid_list_buffer
,
1017 int sid_list_buffer_size
)
1019 const char* sid_string
;
1022 if (IS_SID_STRING(name
)) {
1026 struct wbcDomainSid sid
;
1027 enum wbcSidType type
;
1030 _pam_log_debug(ctx
, LOG_DEBUG
,
1031 "no sid given, looking up: %s\n", name
);
1033 wbc_status
= wbcLookupName("", name
, &sid
, &type
);
1034 if (!WBC_ERROR_IS_OK(wbc_status
)) {
1035 _pam_log(ctx
, LOG_INFO
,
1036 "could not lookup name: %s\n", name
);
1040 wbc_status
= wbcSidToString(&sid
, &sid_str
);
1041 if (!WBC_ERROR_IS_OK(wbc_status
)) {
1045 wbcFreeMemory(sid_str
);
1046 sid_string
= sid_str
;
1049 if (!safe_append_string(sid_list_buffer
, sid_string
,
1050 sid_list_buffer_size
)) {
1058 * Convert a list of names into a list of sids.
1060 * @param ctx PAM winbind context.
1061 * @param user User in PAM request.
1062 * @param name_list List of names or string sids, separated by commas.
1063 * @param sid_list_buffer Where to put the list of string sids.
1064 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1066 * @return false on failure, true on success.
1068 static bool winbind_name_list_to_sid_string_list(struct pwb_context
*ctx
,
1070 const char *name_list
,
1071 char *sid_list_buffer
,
1072 int sid_list_buffer_size
)
1074 bool result
= false;
1075 char *current_name
= NULL
;
1076 const char *search_location
;
1079 if (sid_list_buffer_size
> 0) {
1080 sid_list_buffer
[0] = 0;
1083 search_location
= name_list
;
1084 while ((comma
= strstr(search_location
, ",")) != NULL
) {
1085 current_name
= strndup(search_location
,
1086 comma
- search_location
);
1087 if (NULL
== current_name
) {
1091 if (!winbind_name_to_sid_string(ctx
, user
,
1094 sid_list_buffer_size
)) {
1098 SAFE_FREE(current_name
);
1100 if (!safe_append_string(sid_list_buffer
, ",",
1101 sid_list_buffer_size
)) {
1105 search_location
= comma
+ 1;
1108 if (!winbind_name_to_sid_string(ctx
, user
, search_location
,
1110 sid_list_buffer_size
)) {
1117 SAFE_FREE(current_name
);
1122 * put krb5ccname variable into environment
1124 * @param ctx PAM winbind context.
1125 * @param krb5ccname env variable retrieved from winbindd.
1130 static void _pam_setup_krb5_env(struct pwb_context
*ctx
,
1131 const char *krb5ccname
)
1136 if (off(ctx
->ctrl
, WINBIND_KRB5_AUTH
)) {
1140 if (!krb5ccname
|| (strlen(krb5ccname
) == 0)) {
1144 _pam_log_debug(ctx
, LOG_DEBUG
,
1145 "request returned KRB5CCNAME: %s", krb5ccname
);
1147 if (snprintf(var
, sizeof(var
), "KRB5CCNAME=%s", krb5ccname
) == -1) {
1151 ret
= pam_putenv(ctx
->pamh
, var
);
1153 _pam_log(ctx
, LOG_ERR
,
1154 "failed to set KRB5CCNAME to %s: %s",
1155 var
, pam_strerror(ctx
->pamh
, ret
));
1160 * Set string into the PAM stack.
1162 * @param ctx PAM winbind context.
1163 * @param data_name Key name for pam_set_data.
1164 * @param value String value.
1169 static void _pam_set_data_string(struct pwb_context
*ctx
,
1170 const char *data_name
,
1175 if (!data_name
|| !value
|| (strlen(data_name
) == 0) ||
1176 (strlen(value
) == 0)) {
1180 ret
= pam_set_data(ctx
->pamh
, data_name
, talloc_strdup(NULL
, value
),
1181 _pam_winbind_cleanup_func
);
1183 _pam_log_debug(ctx
, LOG_DEBUG
,
1184 "Could not set data %s: %s\n",
1185 data_name
, pam_strerror(ctx
->pamh
, ret
));
1190 * Set info3 strings into the PAM stack.
1192 * @param ctx PAM winbind context.
1193 * @param data_name Key name for pam_set_data.
1194 * @param value String value.
1199 static void _pam_set_data_info3(struct pwb_context
*ctx
,
1200 struct winbindd_response
*response
)
1202 _pam_set_data_string(ctx
, PAM_WINBIND_HOMEDIR
,
1203 response
->data
.auth
.info3
.home_dir
);
1204 _pam_set_data_string(ctx
, PAM_WINBIND_LOGONSCRIPT
,
1205 response
->data
.auth
.info3
.logon_script
);
1206 _pam_set_data_string(ctx
, PAM_WINBIND_LOGONSERVER
,
1207 response
->data
.auth
.info3
.logon_srv
);
1208 _pam_set_data_string(ctx
, PAM_WINBIND_PROFILEPATH
,
1209 response
->data
.auth
.info3
.profile_path
);
1213 * Free info3 strings in the PAM stack.
1215 * @param pamh PAM handle
1220 static void _pam_free_data_info3(pam_handle_t
*pamh
)
1222 pam_set_data(pamh
, PAM_WINBIND_HOMEDIR
, NULL
, NULL
);
1223 pam_set_data(pamh
, PAM_WINBIND_LOGONSCRIPT
, NULL
, NULL
);
1224 pam_set_data(pamh
, PAM_WINBIND_LOGONSERVER
, NULL
, NULL
);
1225 pam_set_data(pamh
, PAM_WINBIND_PROFILEPATH
, NULL
, NULL
);
1229 * Send PAM_ERROR_MSG for cached or grace logons.
1231 * @param ctx PAM winbind context.
1232 * @param username User in PAM request.
1233 * @param info3_user_flgs Info3 flags containing logon type bits.
1238 static void _pam_warn_logon_type(struct pwb_context
*ctx
,
1239 const char *username
,
1240 uint32_t info3_user_flgs
)
1242 /* inform about logon type */
1243 if (PAM_WB_GRACE_LOGON(info3_user_flgs
)) {
1245 _make_remark(ctx
, PAM_ERROR_MSG
,
1247 "Please change your password as soon you're "
1249 _pam_log_debug(ctx
, LOG_DEBUG
,
1250 "User %s logged on using grace logon\n",
1253 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs
)) {
1255 _make_remark(ctx
, PAM_ERROR_MSG
,
1256 _("Domain Controller unreachable, "
1257 "using cached credentials instead. "
1258 "Network resources may be unavailable"));
1259 _pam_log_debug(ctx
, LOG_DEBUG
,
1260 "User %s logged on using cached credentials\n",
1266 * Send PAM_ERROR_MSG for krb5 errors.
1268 * @param ctx PAM winbind context.
1269 * @param username User in PAM request.
1270 * @param info3_user_flgs Info3 flags containing logon type bits.
1275 static void _pam_warn_krb5_failure(struct pwb_context
*ctx
,
1276 const char *username
,
1277 uint32_t info3_user_flgs
)
1279 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs
)) {
1280 _make_remark(ctx
, PAM_ERROR_MSG
,
1281 _("Failed to establish your Kerberos Ticket cache "
1282 "due time differences\n"
1283 "with the domain controller. "
1284 "Please verify the system time.\n"));
1285 _pam_log_debug(ctx
, LOG_DEBUG
,
1286 "User %s: Clock skew when getting Krb5 TGT\n",
1291 static bool _pam_check_remark_auth_err(struct pwb_context
*ctx
,
1292 const struct wbcAuthErrorInfo
*e
,
1293 const char *nt_status_string
,
1296 const char *ntstatus
= NULL
;
1297 const char *error_string
= NULL
;
1299 if (!e
|| !pam_error
) {
1303 ntstatus
= e
->nt_string
;
1308 if (strcasecmp(ntstatus
, nt_status_string
) == 0) {
1310 error_string
= _get_ntstatus_error_string(nt_status_string
);
1312 _make_remark(ctx
, PAM_ERROR_MSG
, error_string
);
1313 *pam_error
= e
->pam_error
;
1317 if (e
->display_string
) {
1318 _make_remark(ctx
, PAM_ERROR_MSG
, e
->display_string
);
1319 *pam_error
= e
->pam_error
;
1323 _make_remark(ctx
, PAM_ERROR_MSG
, nt_status_string
);
1324 *pam_error
= e
->pam_error
;
1333 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1335 * @param i The wbcUserPasswordPolicyInfo struct.
1337 * @return string (caller needs to talloc_free).
1340 static char *_pam_compose_pwd_restriction_string(struct pwb_context
*ctx
,
1341 struct wbcUserPasswordPolicyInfo
*i
)
1349 str
= talloc_asprintf(ctx
, _("Your password "));
1354 if (i
->min_length_password
> 0) {
1355 str
= talloc_asprintf_append(str
,
1356 _("must be at least %d characters; "),
1357 i
->min_length_password
);
1363 if (i
->password_history
> 0) {
1364 str
= talloc_asprintf_append(str
,
1365 _("cannot repeat any of your previous %d "
1367 i
->password_history
);
1373 if (i
->password_properties
& WBC_DOMAIN_PASSWORD_COMPLEX
) {
1374 str
= talloc_asprintf_append(str
,
1375 _("must contain capitals, numerals "
1377 "and cannot contain your account "
1384 str
= talloc_asprintf_append(str
,
1385 _("Please type a different password. "
1386 "Type a password which meets these requirements in "
1387 "both text boxes."));
1399 /* talk to winbindd */
1400 static int winbind_auth_request(struct pwb_context
*ctx
,
1405 const int warn_pwd_expire
,
1406 struct winbindd_response
*p_response
,
1407 time_t *pwd_last_set
,
1410 struct winbindd_request request
;
1411 struct winbindd_response response
;
1413 bool already_expired
= false;
1415 ZERO_STRUCT(request
);
1416 ZERO_STRUCT(response
);
1422 strncpy(request
.data
.auth
.user
, user
,
1423 sizeof(request
.data
.auth
.user
)-1);
1425 strncpy(request
.data
.auth
.pass
, pass
,
1426 sizeof(request
.data
.auth
.pass
)-1);
1428 request
.data
.auth
.krb5_cc_type
[0] = '\0';
1429 request
.data
.auth
.uid
= -1;
1431 request
.flags
= WBFLAG_PAM_INFO3_TEXT
| WBFLAG_PAM_GET_PWD_POLICY
;
1433 /* Krb5 auth always has to go against the KDC of the user's realm */
1435 if (ctx
->ctrl
& WINBIND_KRB5_AUTH
) {
1436 request
.flags
|= WBFLAG_PAM_CONTACT_TRUSTDOM
;
1439 if (ctx
->ctrl
& (WINBIND_KRB5_AUTH
|WINBIND_CACHED_LOGIN
)) {
1440 struct passwd
*pwd
= NULL
;
1442 pwd
= getpwnam(user
);
1444 return PAM_USER_UNKNOWN
;
1446 request
.data
.auth
.uid
= pwd
->pw_uid
;
1449 if (ctx
->ctrl
& WINBIND_KRB5_AUTH
) {
1451 _pam_log_debug(ctx
, LOG_DEBUG
,
1452 "enabling krb5 login flag\n");
1454 request
.flags
|= WBFLAG_PAM_KRB5
|
1455 WBFLAG_PAM_FALLBACK_AFTER_KRB5
;
1458 if (ctx
->ctrl
& WINBIND_CACHED_LOGIN
) {
1459 _pam_log_debug(ctx
, LOG_DEBUG
,
1460 "enabling cached login flag\n");
1461 request
.flags
|= WBFLAG_PAM_CACHED_LOGIN
;
1466 request
.flags
|= WBFLAG_PAM_UNIX_NAME
;
1469 if (cctype
!= NULL
) {
1470 strncpy(request
.data
.auth
.krb5_cc_type
, cctype
,
1471 sizeof(request
.data
.auth
.krb5_cc_type
) - 1);
1472 _pam_log_debug(ctx
, LOG_DEBUG
,
1473 "enabling request for a %s krb5 ccache\n",
1477 request
.data
.auth
.require_membership_of_sid
[0] = '\0';
1479 if (member
!= NULL
) {
1481 if (!winbind_name_list_to_sid_string_list(ctx
, user
,
1483 request
.data
.auth
.require_membership_of_sid
,
1484 sizeof(request
.data
.auth
.require_membership_of_sid
))) {
1486 _pam_log_debug(ctx
, LOG_ERR
,
1487 "failed to serialize membership of sid "
1488 "\"%s\"\n", member
);
1489 return PAM_AUTH_ERR
;
1493 ret
= pam_winbind_request_log(ctx
, WINBINDD_PAM_AUTH
,
1494 &request
, &response
, user
);
1497 *pwd_last_set
= response
.data
.auth
.info3
.pass_last_set_time
;
1501 /* We want to process the response in the caller. */
1502 *p_response
= response
;
1507 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx
, response
,
1508 "NT_STATUS_PASSWORD_EXPIRED");
1509 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx
, response
,
1510 "NT_STATUS_PASSWORD_MUST_CHANGE");
1511 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx
, response
,
1512 "NT_STATUS_INVALID_WORKSTATION");
1513 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx
, response
,
1514 "NT_STATUS_INVALID_LOGON_HOURS");
1515 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx
, response
,
1516 "NT_STATUS_ACCOUNT_EXPIRED");
1517 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx
, response
,
1518 "NT_STATUS_ACCOUNT_DISABLED");
1519 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx
, response
,
1520 "NT_STATUS_ACCOUNT_LOCKED_OUT");
1521 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx
, response
,
1522 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT");
1523 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx
, response
,
1524 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT");
1525 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx
, response
,
1526 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT");
1527 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx
, response
,
1528 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
1529 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx
, response
,
1530 "NT_STATUS_NO_LOGON_SERVERS");
1531 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx
, response
,
1532 "NT_STATUS_WRONG_PASSWORD");
1533 PAM_WB_REMARK_CHECK_RESPONSE_RET(ctx
, response
,
1534 "NT_STATUS_ACCESS_DENIED");
1537 if (ret
== PAM_SUCCESS
) {
1539 /* warn a user if the password is about to expire soon */
1540 _pam_warn_password_expiry(ctx
, &response
,
1544 if (already_expired
== true) {
1545 SMB_TIME_T last_set
;
1546 last_set
= response
.data
.auth
.info3
.pass_last_set_time
;
1547 _pam_log_debug(ctx
, LOG_DEBUG
,
1548 "Password has expired "
1549 "(Password was last set: %lld, "
1550 "the policy says it should expire here "
1551 "%lld (now it's: %lu))\n",
1552 (long long int)last_set
,
1553 (long long int)last_set
+
1554 response
.data
.auth
.policy
.expire
,
1557 return PAM_AUTHTOK_EXPIRED
;
1560 /* inform about logon type */
1561 _pam_warn_logon_type(ctx
, user
,
1562 response
.data
.auth
.info3
.user_flgs
);
1564 /* inform about krb5 failures */
1565 _pam_warn_krb5_failure(ctx
, user
,
1566 response
.data
.auth
.info3
.user_flgs
);
1568 /* set some info3 info for other modules in the stack */
1569 _pam_set_data_info3(ctx
, &response
);
1571 /* put krb5ccname into env */
1572 _pam_setup_krb5_env(ctx
, response
.data
.auth
.krb5ccname
);
1574 /* If winbindd returned a username, return the pointer to it
1576 if (user_ret
&& response
.data
.auth
.unix_username
[0]) {
1577 /* We have to trust it's a null terminated string. */
1578 *user_ret
= strndup(response
.data
.auth
.unix_username
,
1579 sizeof(response
.data
.auth
.unix_username
) - 1);
1586 /* talk to winbindd */
1587 static int winbind_chauthtok_request(struct pwb_context
*ctx
,
1589 const char *oldpass
,
1590 const char *newpass
,
1591 time_t pwd_last_set
)
1594 struct wbcChangePasswordParams params
;
1595 struct wbcAuthErrorInfo
*error
= NULL
;
1596 struct wbcUserPasswordPolicyInfo
*policy
= NULL
;
1597 enum wbcPasswordChangeRejectReason reject_reason
= -1;
1601 const char *codes
[] = {
1602 "NT_STATUS_BACKUP_CONTROLLER",
1603 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1604 "NT_STATUS_NO_LOGON_SERVERS",
1605 "NT_STATUS_ACCESS_DENIED",
1606 "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1607 "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1608 "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1610 int ret
= PAM_AUTH_ERR
;
1612 ZERO_STRUCT(params
);
1614 if (ctx
->ctrl
& WINBIND_KRB5_AUTH
) {
1615 flags
|= WBFLAG_PAM_KRB5
|
1616 WBFLAG_PAM_CONTACT_TRUSTDOM
;
1619 if (ctx
->ctrl
& WINBIND_CACHED_LOGIN
) {
1620 flags
|= WBFLAG_PAM_CACHED_LOGIN
;
1623 params
.account_name
= user
;
1624 params
.level
= WBC_AUTH_USER_LEVEL_PLAIN
;
1625 params
.old_password
.plaintext
= oldpass
;
1626 params
.new_password
.plaintext
= newpass
;
1627 params
.flags
= flags
;
1629 wbc_status
= wbcChangeUserPasswordEx(¶ms
, &error
, &reject_reason
, &policy
);
1630 ret
= wbc_auth_error_to_pam_error(ctx
, error
, wbc_status
,
1631 user
, "wbcChangeUserPasswordEx");
1633 if (WBC_ERROR_IS_OK(wbc_status
)) {
1634 _pam_log(ctx
, LOG_NOTICE
,
1635 "user '%s' password changed", user
);
1640 wbcFreeMemory(policy
);
1644 for (i
=0; i
<ARRAY_SIZE(codes
); i
++) {
1646 if (_pam_check_remark_auth_err(ctx
, error
, codes
[i
], &_ret
)) {
1652 if (!strcasecmp(error
->nt_string
,
1653 "NT_STATUS_PASSWORD_RESTRICTION")) {
1655 char *pwd_restriction_string
= NULL
;
1656 SMB_TIME_T min_pwd_age
= 0;
1659 min_pwd_age
= policy
->min_passwordage
;
1662 /* FIXME: avoid to send multiple PAM messages after another */
1663 switch (reject_reason
) {
1666 case WBC_PWD_CHANGE_REJECT_OTHER
:
1667 if ((min_pwd_age
> 0) &&
1668 (pwd_last_set
+ min_pwd_age
> time(NULL
))) {
1669 PAM_WB_REMARK_DIRECT(ctx
,
1670 "NT_STATUS_PWD_TOO_RECENT");
1673 case WBC_PWD_CHANGE_REJECT_TOO_SHORT
:
1674 PAM_WB_REMARK_DIRECT(ctx
,
1675 "NT_STATUS_PWD_TOO_SHORT");
1677 case WBC_PWD_CHANGE_REJECT_IN_HISTORY
:
1678 PAM_WB_REMARK_DIRECT(ctx
,
1679 "NT_STATUS_PWD_HISTORY_CONFLICT");
1681 case WBC_PWD_CHANGE_REJECT_COMPLEXITY
:
1682 _make_remark(ctx
, PAM_ERROR_MSG
,
1683 _("Password does not meet "
1684 "complexity requirements"));
1687 _pam_log_debug(ctx
, LOG_DEBUG
,
1688 "unknown password change "
1689 "reject reason: %d",
1694 pwd_restriction_string
=
1695 _pam_compose_pwd_restriction_string(ctx
, policy
);
1696 if (pwd_restriction_string
) {
1697 _make_remark(ctx
, PAM_ERROR_MSG
,
1698 pwd_restriction_string
);
1699 TALLOC_FREE(pwd_restriction_string
);
1703 wbcFreeMemory(error
);
1704 wbcFreeMemory(policy
);
1710 * Checks if a user has an account
1713 * 1 = User not found
1717 static int valid_user(struct pwb_context
*ctx
,
1720 /* check not only if the user is available over NSS calls, also make
1721 * sure it's really a winbind user, this is important when stacking PAM
1722 * modules in the 'account' or 'password' facility. */
1725 struct passwd
*pwd
= NULL
;
1726 struct passwd
*wb_pwd
= NULL
;
1728 pwd
= getpwnam(user
);
1733 wbc_status
= wbcGetpwnam(user
, &wb_pwd
);
1734 wbcFreeMemory(wb_pwd
);
1735 if (!WBC_ERROR_IS_OK(wbc_status
)) {
1736 _pam_log(ctx
, LOG_DEBUG
, "valid_user: wbcGetpwnam gave %s\n",
1737 wbcErrorString(wbc_status
));
1740 switch (wbc_status
) {
1741 case WBC_ERR_UNKNOWN_USER
:
1743 case WBC_ERR_SUCCESS
:
1751 static char *_pam_delete(register char *xx
)
1759 * obtain a password from the user
1762 static int _winbind_read_password(struct pwb_context
*ctx
,
1764 const char *comment
,
1765 const char *prompt1
,
1766 const char *prompt2
,
1774 _pam_log(ctx
, LOG_DEBUG
, "getting password (0x%08x)", ctrl
);
1777 * make sure nothing inappropriate gets returned
1780 *pass
= token
= NULL
;
1783 * which authentication token are we getting?
1786 if (on(WINBIND__OLD_PASSWORD
, ctrl
)) {
1787 authtok_flag
= PAM_OLDAUTHTOK
;
1789 authtok_flag
= PAM_AUTHTOK
;
1793 * should we obtain the password from a PAM item ?
1796 if (on(WINBIND_TRY_FIRST_PASS_ARG
, ctrl
) ||
1797 on(WINBIND_USE_FIRST_PASS_ARG
, ctrl
)) {
1798 retval
= _pam_get_item(ctx
->pamh
, authtok_flag
, &item
);
1799 if (retval
!= PAM_SUCCESS
) {
1801 _pam_log(ctx
, LOG_ALERT
,
1802 "pam_get_item returned error "
1803 "to unix-read-password");
1805 } else if (item
!= NULL
) { /* we have a password! */
1808 _pam_log(ctx
, LOG_DEBUG
,
1809 "pam_get_item returned a password");
1811 } else if (on(WINBIND_USE_FIRST_PASS_ARG
, ctrl
)) {
1812 return PAM_AUTHTOK_RECOVER_ERR
; /* didn't work */
1813 } else if (on(WINBIND_USE_AUTHTOK_ARG
, ctrl
)
1814 && off(WINBIND__OLD_PASSWORD
, ctrl
)) {
1815 return PAM_AUTHTOK_RECOVER_ERR
;
1819 * getting here implies we will have to get the password from the
1824 struct pam_message msg
[3], *pmsg
[3];
1825 struct pam_response
*resp
;
1828 /* prepare to converse */
1830 if (comment
!= NULL
&& off(ctrl
, WINBIND_SILENT
)) {
1832 msg
[0].msg_style
= PAM_TEXT_INFO
;
1833 msg
[0].msg
= discard_const_p(char, comment
);
1840 msg
[i
].msg_style
= PAM_PROMPT_ECHO_OFF
;
1841 msg
[i
++].msg
= discard_const_p(char, prompt1
);
1844 if (prompt2
!= NULL
) {
1846 msg
[i
].msg_style
= PAM_PROMPT_ECHO_OFF
;
1847 msg
[i
++].msg
= discard_const_p(char, prompt2
);
1850 /* so call the conversation expecting i responses */
1852 retval
= converse(ctx
->pamh
, i
, pmsg
, &resp
);
1854 if (retval
== PAM_SUCCESS
) {
1855 retval
= PAM_AUTHTOK_RECOVER_ERR
;
1859 if (retval
!= PAM_SUCCESS
) {
1860 _pam_drop_reply(resp
, i
);
1864 /* interpret the response */
1866 token
= x_strdup(resp
[i
- replies
].resp
);
1868 _pam_log(ctx
, LOG_NOTICE
,
1869 "could not recover "
1870 "authentication token");
1871 retval
= PAM_AUTHTOK_RECOVER_ERR
;
1876 /* verify that password entered correctly */
1877 if (!resp
[i
- 1].resp
||
1878 strcmp(token
, resp
[i
- 1].resp
)) {
1879 _pam_delete(token
); /* mistyped */
1880 retval
= PAM_AUTHTOK_RECOVER_ERR
;
1881 _make_remark(ctx
, PAM_ERROR_MSG
,
1887 * tidy up the conversation (resp_retcode) is ignored
1888 * -- what is it for anyway? AGM
1890 _pam_drop_reply(resp
, i
);
1894 if (retval
!= PAM_SUCCESS
) {
1895 _pam_log_debug(ctx
, LOG_DEBUG
,
1896 "unable to obtain a password");
1899 /* 'token' is the entered password */
1901 /* we store this password as an item */
1903 retval
= pam_set_item(ctx
->pamh
, authtok_flag
, token
);
1904 _pam_delete(token
); /* clean it up */
1905 if (retval
!= PAM_SUCCESS
||
1906 (retval
= _pam_get_item(ctx
->pamh
, authtok_flag
, &item
)) != PAM_SUCCESS
) {
1908 _pam_log(ctx
, LOG_CRIT
, "error manipulating password");
1914 item
= NULL
; /* break link to password */
1919 static const char *get_conf_item_string(struct pwb_context
*ctx
,
1924 const char *parm_opt
= NULL
;
1926 if (!(ctx
->ctrl
& config_flag
)) {
1930 /* let the pam opt take precedence over the pam_winbind.conf option */
1931 for (i
=0; i
<ctx
->argc
; i
++) {
1933 if ((strncmp(ctx
->argv
[i
], item
, strlen(item
)) == 0)) {
1936 if ((p
= strchr(ctx
->argv
[i
], '=')) == NULL
) {
1937 _pam_log(ctx
, LOG_INFO
,
1938 "no \"=\" delimiter for \"%s\" found\n",
1942 _pam_log_debug(ctx
, LOG_INFO
,
1943 "PAM config: %s '%s'\n", item
, p
+1);
1951 key
= talloc_asprintf(ctx
, "global:%s", item
);
1956 parm_opt
= iniparser_getstr(ctx
->dict
, key
);
1959 _pam_log_debug(ctx
, LOG_INFO
, "CONFIG file: %s '%s'\n",
1966 static int get_config_item_int(struct pwb_context
*ctx
,
1970 int i
, parm_opt
= -1;
1972 if (!(ctx
->ctrl
& config_flag
)) {
1976 /* let the pam opt take precedence over the pam_winbind.conf option */
1977 for (i
= 0; i
< ctx
->argc
; i
++) {
1979 if ((strncmp(ctx
->argv
[i
], item
, strlen(item
)) == 0)) {
1982 if ((p
= strchr(ctx
->argv
[i
], '=')) == NULL
) {
1983 _pam_log(ctx
, LOG_INFO
,
1984 "no \"=\" delimiter for \"%s\" found\n",
1988 parm_opt
= atoi(p
+ 1);
1989 _pam_log_debug(ctx
, LOG_INFO
,
1990 "PAM config: %s '%d'\n",
1999 key
= talloc_asprintf(ctx
, "global:%s", item
);
2004 parm_opt
= iniparser_getint(ctx
->dict
, key
, -1);
2007 _pam_log_debug(ctx
, LOG_INFO
,
2008 "CONFIG file: %s '%d'\n",
2015 static const char *get_krb5_cc_type_from_config(struct pwb_context
*ctx
)
2017 return get_conf_item_string(ctx
, "krb5_ccache_type",
2018 WINBIND_KRB5_CCACHE_TYPE
);
2021 static const char *get_member_from_config(struct pwb_context
*ctx
)
2023 const char *ret
= NULL
;
2024 ret
= get_conf_item_string(ctx
, "require_membership_of",
2025 WINBIND_REQUIRED_MEMBERSHIP
);
2029 return get_conf_item_string(ctx
, "require-membership-of",
2030 WINBIND_REQUIRED_MEMBERSHIP
);
2033 static int get_warn_pwd_expire_from_config(struct pwb_context
*ctx
)
2036 ret
= get_config_item_int(ctx
, "warn_pwd_expire",
2037 WINBIND_WARN_PWD_EXPIRE
);
2038 /* no or broken setting */
2040 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES
;
2046 * Retrieve the winbind separator.
2048 * @param ctx PAM winbind context.
2050 * @return string separator character. NULL on failure.
2053 static char winbind_get_separator(struct pwb_context
*ctx
)
2056 static struct wbcInterfaceDetails
*details
= NULL
;
2058 wbc_status
= wbcInterfaceDetails(&details
);
2059 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2060 _pam_log(ctx
, LOG_ERR
,
2061 "Could not retrieve winbind interface details: %s",
2062 wbcErrorString(wbc_status
));
2070 return details
->winbind_separator
;
2075 * Convert a upn to a name.
2077 * @param ctx PAM winbind context.
2078 * @param upn USer UPN to be trabslated.
2080 * @return converted name. NULL pointer on failure. Caller needs to free.
2083 static char* winbind_upn_to_username(struct pwb_context
*ctx
,
2087 wbcErr wbc_status
= WBC_ERR_UNKNOWN_FAILURE
;
2088 struct wbcDomainSid sid
;
2089 enum wbcSidType type
;
2093 /* This cannot work when the winbind separator = @ */
2095 sep
= winbind_get_separator(ctx
);
2096 if (!sep
|| sep
== '@') {
2100 /* Convert the UPN to a SID */
2102 wbc_status
= wbcLookupName("", upn
, &sid
, &type
);
2103 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2107 /* Convert the the SID back to the sAMAccountName */
2109 wbc_status
= wbcLookupSid(&sid
, &domain
, &name
, &type
);
2110 if (!WBC_ERROR_IS_OK(wbc_status
)) {
2114 return talloc_asprintf(ctx
, "%s\\%s", domain
, name
);
2118 int pam_sm_authenticate(pam_handle_t
*pamh
, int flags
,
2119 int argc
, const char **argv
)
2121 const char *username
;
2122 const char *password
;
2123 const char *member
= NULL
;
2124 const char *cctype
= NULL
;
2125 int warn_pwd_expire
;
2126 int retval
= PAM_AUTH_ERR
;
2127 char *username_ret
= NULL
;
2128 char *new_authtok_required
= NULL
;
2129 char *real_username
= NULL
;
2130 struct pwb_context
*ctx
= NULL
;
2132 retval
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2137 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx
);
2139 /* Get the username */
2140 retval
= pam_get_user(pamh
, &username
, NULL
);
2141 if ((retval
!= PAM_SUCCESS
) || (!username
)) {
2142 _pam_log_debug(ctx
, LOG_DEBUG
,
2143 "can not get the username");
2144 retval
= PAM_SERVICE_ERR
;
2150 /* Decode the user name since AIX does not support logn user
2151 names by default. The name is encoded as _#uid. */
2153 if (username
[0] == '_') {
2154 uid_t id
= atoi(&username
[1]);
2155 struct passwd
*pw
= NULL
;
2157 if ((id
!=0) && ((pw
= getpwuid(id
)) != NULL
)) {
2158 real_username
= strdup(pw
->pw_name
);
2163 if (!real_username
) {
2164 /* Just making a copy of the username we got from PAM */
2165 if ((real_username
= strdup(username
)) == NULL
) {
2166 _pam_log_debug(ctx
, LOG_DEBUG
,
2167 "memory allocation failure when copying "
2169 retval
= PAM_SERVICE_ERR
;
2174 /* Maybe this was a UPN */
2176 if (strchr(real_username
, '@') != NULL
) {
2177 char *samaccountname
= NULL
;
2179 samaccountname
= winbind_upn_to_username(ctx
,
2181 if (samaccountname
) {
2182 free(real_username
);
2183 real_username
= strdup(samaccountname
);
2187 retval
= _winbind_read_password(ctx
, ctx
->ctrl
, NULL
,
2188 _("Password: "), NULL
,
2191 if (retval
!= PAM_SUCCESS
) {
2192 _pam_log(ctx
, LOG_ERR
,
2193 "Could not retrieve user's password");
2194 retval
= PAM_AUTHTOK_ERR
;
2198 /* Let's not give too much away in the log file */
2200 #ifdef DEBUG_PASSWORD
2201 _pam_log_debug(ctx
, LOG_INFO
,
2202 "Verify user '%s' with password '%s'",
2203 real_username
, password
);
2205 _pam_log_debug(ctx
, LOG_INFO
,
2206 "Verify user '%s'", real_username
);
2209 member
= get_member_from_config(ctx
);
2210 cctype
= get_krb5_cc_type_from_config(ctx
);
2211 warn_pwd_expire
= get_warn_pwd_expire_from_config(ctx
);
2213 /* Now use the username to look up password */
2214 retval
= winbind_auth_request(ctx
, real_username
, password
,
2215 member
, cctype
, warn_pwd_expire
, NULL
,
2216 NULL
, &username_ret
);
2218 if (retval
== PAM_NEW_AUTHTOK_REQD
||
2219 retval
== PAM_AUTHTOK_EXPIRED
) {
2221 char *new_authtok_required_during_auth
= NULL
;
2223 new_authtok_required
= talloc_asprintf(NULL
, "%d", retval
);
2224 if (!new_authtok_required
) {
2225 retval
= PAM_BUF_ERR
;
2229 pam_set_data(pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD
,
2230 new_authtok_required
,
2231 _pam_winbind_cleanup_func
);
2233 retval
= PAM_SUCCESS
;
2235 new_authtok_required_during_auth
= talloc_asprintf(NULL
, "%d", true);
2236 if (!new_authtok_required_during_auth
) {
2237 retval
= PAM_BUF_ERR
;
2241 pam_set_data(pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH
,
2242 new_authtok_required_during_auth
,
2243 _pam_winbind_cleanup_func
);
2250 pam_set_item (pamh
, PAM_USER
, username_ret
);
2251 _pam_log_debug(ctx
, LOG_INFO
,
2252 "Returned user was '%s'", username_ret
);
2256 if (real_username
) {
2257 free(real_username
);
2260 if (!new_authtok_required
) {
2261 pam_set_data(pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD
, NULL
, NULL
);
2264 if (retval
!= PAM_SUCCESS
) {
2265 _pam_free_data_info3(pamh
);
2268 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx
, retval
);
2276 int pam_sm_setcred(pam_handle_t
*pamh
, int flags
,
2277 int argc
, const char **argv
)
2279 int ret
= PAM_SYSTEM_ERR
;
2280 struct pwb_context
*ctx
= NULL
;
2282 ret
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2287 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx
);
2289 switch (flags
& ~PAM_SILENT
) {
2291 case PAM_DELETE_CRED
:
2292 ret
= pam_sm_close_session(pamh
, flags
, argc
, argv
);
2294 case PAM_REFRESH_CRED
:
2295 _pam_log_debug(ctx
, LOG_WARNING
,
2296 "PAM_REFRESH_CRED not implemented");
2299 case PAM_REINITIALIZE_CRED
:
2300 _pam_log_debug(ctx
, LOG_WARNING
,
2301 "PAM_REINITIALIZE_CRED not implemented");
2304 case PAM_ESTABLISH_CRED
:
2305 _pam_log_debug(ctx
, LOG_WARNING
,
2306 "PAM_ESTABLISH_CRED not implemented");
2310 ret
= PAM_SYSTEM_ERR
;
2316 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx
, ret
);
2324 * Account management. We want to verify that the account exists
2325 * before returning PAM_SUCCESS
2328 int pam_sm_acct_mgmt(pam_handle_t
*pamh
, int flags
,
2329 int argc
, const char **argv
)
2331 const char *username
;
2332 int ret
= PAM_USER_UNKNOWN
;
2334 struct pwb_context
*ctx
= NULL
;
2336 ret
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2341 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx
);
2344 /* Get the username */
2345 ret
= pam_get_user(pamh
, &username
, NULL
);
2346 if ((ret
!= PAM_SUCCESS
) || (!username
)) {
2347 _pam_log_debug(ctx
, LOG_DEBUG
,
2348 "can not get the username");
2349 ret
= PAM_SERVICE_ERR
;
2353 /* Verify the username */
2354 ret
= valid_user(ctx
, username
);
2357 /* some sort of system error. The log was already printed */
2358 ret
= PAM_SERVICE_ERR
;
2361 /* the user does not exist */
2362 _pam_log_debug(ctx
, LOG_NOTICE
, "user '%s' not found",
2364 if (ctx
->ctrl
& WINBIND_UNKNOWN_OK_ARG
) {
2368 ret
= PAM_USER_UNKNOWN
;
2371 pam_get_data(pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD
,
2372 (const void **)&tmp
);
2374 ret
= atoi((const char *)tmp
);
2376 case PAM_AUTHTOK_EXPIRED
:
2377 /* fall through, since new token is required in this case */
2378 case PAM_NEW_AUTHTOK_REQD
:
2379 _pam_log(ctx
, LOG_WARNING
,
2380 "pam_sm_acct_mgmt success but %s is set",
2381 PAM_WINBIND_NEW_AUTHTOK_REQD
);
2382 _pam_log(ctx
, LOG_NOTICE
,
2383 "user '%s' needs new password",
2385 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2386 ret
= PAM_NEW_AUTHTOK_REQD
;
2389 _pam_log(ctx
, LOG_WARNING
,
2390 "pam_sm_acct_mgmt success");
2391 _pam_log(ctx
, LOG_NOTICE
,
2392 "user '%s' granted access", username
);
2398 /* Otherwise, the authentication looked good */
2399 _pam_log(ctx
, LOG_NOTICE
,
2400 "user '%s' granted access", username
);
2404 /* we don't know anything about this return value */
2405 _pam_log(ctx
, LOG_ERR
,
2406 "internal module error (ret = %d, user = '%s')",
2408 ret
= PAM_SERVICE_ERR
;
2412 /* should not be reached */
2417 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx
, ret
);
2425 int pam_sm_open_session(pam_handle_t
*pamh
, int flags
,
2426 int argc
, const char **argv
)
2428 int ret
= PAM_SYSTEM_ERR
;
2429 struct pwb_context
*ctx
= NULL
;
2431 ret
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2436 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx
);
2441 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx
, ret
);
2449 int pam_sm_close_session(pam_handle_t
*pamh
, int flags
,
2450 int argc
, const char **argv
)
2452 int retval
= PAM_SUCCESS
;
2453 struct pwb_context
*ctx
= NULL
;
2455 retval
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2460 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx
);
2462 if (!(flags
& PAM_DELETE_CRED
)) {
2463 retval
= PAM_SUCCESS
;
2467 if (ctx
->ctrl
& WINBIND_KRB5_AUTH
) {
2469 /* destroy the ccache here */
2470 struct winbindd_request request
;
2471 struct winbindd_response response
;
2473 const char *ccname
= NULL
;
2474 struct passwd
*pwd
= NULL
;
2476 ZERO_STRUCT(request
);
2477 ZERO_STRUCT(response
);
2479 retval
= pam_get_user(pamh
, &user
, _("Username: "));
2481 _pam_log(ctx
, LOG_ERR
,
2482 "could not identify user");
2487 _pam_log(ctx
, LOG_ERR
,
2488 "username was NULL!");
2489 retval
= PAM_USER_UNKNOWN
;
2493 _pam_log_debug(ctx
, LOG_DEBUG
,
2494 "username [%s] obtained", user
);
2496 ccname
= pam_getenv(pamh
, "KRB5CCNAME");
2497 if (ccname
== NULL
) {
2498 _pam_log_debug(ctx
, LOG_DEBUG
,
2499 "user has no KRB5CCNAME environment");
2502 strncpy(request
.data
.logoff
.user
, user
,
2503 sizeof(request
.data
.logoff
.user
) - 1);
2506 strncpy(request
.data
.logoff
.krb5ccname
, ccname
,
2507 sizeof(request
.data
.logoff
.krb5ccname
) - 1);
2510 pwd
= getpwnam(user
);
2512 retval
= PAM_USER_UNKNOWN
;
2515 request
.data
.logoff
.uid
= pwd
->pw_uid
;
2517 request
.flags
= WBFLAG_PAM_KRB5
|
2518 WBFLAG_PAM_CONTACT_TRUSTDOM
;
2520 retval
= pam_winbind_request_log(ctx
,
2521 WINBINDD_PAM_LOGOFF
,
2522 &request
, &response
, user
);
2527 * Delete the krb5 ccname variable from the PAM environment
2528 * if it was set by winbind.
2530 if (ctx
->ctrl
& WINBIND_KRB5_AUTH
) {
2531 pam_putenv(pamh
, "KRB5CCNAME");
2534 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx
, retval
);
2542 * evaluate whether we need to re-authenticate with kerberos after a
2545 * @param ctx PAM winbind context.
2546 * @param user The username
2548 * @return boolean Returns true if required, false if not.
2551 static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context
*ctx
,
2555 /* Make sure that we only do this if a) the chauthtok got initiated
2556 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2557 * later password change via the "passwd" command if done by the user
2559 * NB. If we login from gdm or xdm and the password expires,
2560 * we change the password, but there is no memory cache.
2561 * Thus, even for passthrough login, we should do the
2562 * authentication again to update memory cache.
2566 char *new_authtok_reqd_during_auth
= NULL
;
2567 struct passwd
*pwd
= NULL
;
2569 _pam_get_data(ctx
->pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH
,
2570 &new_authtok_reqd_during_auth
);
2571 pam_set_data(ctx
->pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH
,
2574 if (new_authtok_reqd_during_auth
) {
2578 pwd
= getpwnam(user
);
2583 if (getuid() == pwd
->pw_uid
) {
2592 int pam_sm_chauthtok(pam_handle_t
* pamh
, int flags
,
2593 int argc
, const char **argv
)
2597 bool cached_login
= false;
2599 /* <DO NOT free() THESE> */
2601 char *pass_old
, *pass_new
;
2602 /* </DO NOT free() THESE> */
2607 char *username_ret
= NULL
;
2608 struct winbindd_response response
;
2609 struct pwb_context
*ctx
= NULL
;
2611 ZERO_STRUCT(response
);
2613 ret
= _pam_winbind_init_context(pamh
, flags
, argc
, argv
, &ctx
);
2618 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx
);
2620 cached_login
= (ctx
->ctrl
& WINBIND_CACHED_LOGIN
);
2622 /* clearing offline bit for auth */
2623 ctx
->ctrl
&= ~WINBIND_CACHED_LOGIN
;
2626 * First get the name of a user
2628 ret
= pam_get_user(pamh
, &user
, _("Username: "));
2630 _pam_log(ctx
, LOG_ERR
,
2631 "password - could not identify user");
2636 _pam_log(ctx
, LOG_ERR
, "username was NULL!");
2637 ret
= PAM_USER_UNKNOWN
;
2641 _pam_log_debug(ctx
, LOG_DEBUG
, "username [%s] obtained", user
);
2643 /* check if this is really a user in winbindd, not only in NSS */
2644 ret
= valid_user(ctx
, user
);
2647 ret
= PAM_USER_UNKNOWN
;
2650 ret
= PAM_SYSTEM_ERR
;
2657 * obtain and verify the current password (OLDAUTHTOK) for
2661 if (flags
& PAM_PRELIM_CHECK
) {
2662 time_t pwdlastset_prelim
= 0;
2664 /* instruct user what is happening */
2666 #define greeting _("Changing password for ")
2667 Announce
= talloc_asprintf(ctx
, "%s %s", greeting
, user
);
2669 _pam_log(ctx
, LOG_CRIT
,
2670 "password - out of memory");
2676 lctrl
= ctx
->ctrl
| WINBIND__OLD_PASSWORD
;
2677 ret
= _winbind_read_password(ctx
, lctrl
,
2679 _("(current) NT password: "),
2681 (const char **) &pass_old
);
2682 TALLOC_FREE(Announce
);
2683 if (ret
!= PAM_SUCCESS
) {
2684 _pam_log(ctx
, LOG_NOTICE
,
2685 "password - (old) token not obtained");
2689 /* verify that this is the password for this user */
2691 ret
= winbind_auth_request(ctx
, user
, pass_old
,
2692 NULL
, NULL
, 0, &response
,
2693 &pwdlastset_prelim
, NULL
);
2695 if (ret
!= PAM_ACCT_EXPIRED
&&
2696 ret
!= PAM_AUTHTOK_EXPIRED
&&
2697 ret
!= PAM_NEW_AUTHTOK_REQD
&&
2698 ret
!= PAM_SUCCESS
) {
2703 pam_set_data(pamh
, PAM_WINBIND_PWD_LAST_SET
,
2704 (void *)pwdlastset_prelim
, NULL
);
2706 ret
= pam_set_item(pamh
, PAM_OLDAUTHTOK
,
2707 (const void *) pass_old
);
2709 if (ret
!= PAM_SUCCESS
) {
2710 _pam_log(ctx
, LOG_CRIT
,
2711 "failed to set PAM_OLDAUTHTOK");
2713 } else if (flags
& PAM_UPDATE_AUTHTOK
) {
2715 time_t pwdlastset_update
= 0;
2718 * obtain the proposed password
2722 * get the old token back.
2725 ret
= _pam_get_item(pamh
, PAM_OLDAUTHTOK
, &pass_old
);
2727 if (ret
!= PAM_SUCCESS
) {
2728 _pam_log(ctx
, LOG_NOTICE
,
2729 "user not authenticated");
2733 lctrl
= ctx
->ctrl
& ~WINBIND_TRY_FIRST_PASS_ARG
;
2735 if (on(WINBIND_USE_AUTHTOK_ARG
, lctrl
)) {
2736 lctrl
|= WINBIND_USE_FIRST_PASS_ARG
;
2739 ret
= PAM_AUTHTOK_ERR
;
2740 while ((ret
!= PAM_SUCCESS
) && (retry
++ < MAX_PASSWD_TRIES
)) {
2742 * use_authtok is to force the use of a previously entered
2743 * password -- needed for pluggable password strength checking
2746 ret
= _winbind_read_password(ctx
, lctrl
,
2748 _("Enter new NT password: "),
2749 _("Retype new NT password: "),
2750 (const char **)&pass_new
);
2752 if (ret
!= PAM_SUCCESS
) {
2753 _pam_log_debug(ctx
, LOG_ALERT
,
2755 "new password not obtained");
2756 pass_old
= NULL
;/* tidy up */
2761 * At this point we know who the user is and what they
2762 * propose as their new password. Verify that the new
2763 * password is acceptable.
2766 if (pass_new
[0] == '\0') {/* "\0" password = NULL */
2772 * By reaching here we have approved the passwords and must now
2773 * rebuild the password database file.
2775 _pam_get_data(pamh
, PAM_WINBIND_PWD_LAST_SET
,
2776 &pwdlastset_update
);
2779 * if cached creds were enabled, make sure to set the
2780 * WINBIND_CACHED_LOGIN bit here in order to have winbindd
2781 * update the cached creds storage - gd
2784 ctx
->ctrl
|= WINBIND_CACHED_LOGIN
;
2787 ret
= winbind_chauthtok_request(ctx
, user
, pass_old
,
2788 pass_new
, pwdlastset_update
);
2790 _pam_overwrite(pass_new
);
2791 _pam_overwrite(pass_old
);
2792 pass_old
= pass_new
= NULL
;
2796 if (_pam_require_krb5_auth_after_chauthtok(ctx
, user
)) {
2798 const char *member
= NULL
;
2799 const char *cctype
= NULL
;
2800 int warn_pwd_expire
;
2802 member
= get_member_from_config(ctx
);
2803 cctype
= get_krb5_cc_type_from_config(ctx
);
2804 warn_pwd_expire
= get_warn_pwd_expire_from_config(ctx
);
2806 /* Keep WINBIND_CACHED_LOGIN bit for
2807 * authentication after changing the password.
2808 * This will update the cached credentials in case
2809 * that winbindd_dual_pam_chauthtok() fails
2814 ret
= winbind_auth_request(ctx
, user
, pass_new
,
2815 member
, cctype
, 0, &response
,
2816 NULL
, &username_ret
);
2817 _pam_overwrite(pass_new
);
2818 _pam_overwrite(pass_old
);
2819 pass_old
= pass_new
= NULL
;
2821 if (ret
== PAM_SUCCESS
) {
2823 /* warn a user if the password is about to
2825 _pam_warn_password_expiry(ctx
, &response
,
2829 /* set some info3 info for other modules in the
2831 _pam_set_data_info3(ctx
, &response
);
2833 /* put krb5ccname into env */
2834 _pam_setup_krb5_env(ctx
,
2835 response
.data
.auth
.krb5ccname
);
2838 pam_set_item(pamh
, PAM_USER
,
2840 _pam_log_debug(ctx
, LOG_INFO
,
2841 "Returned user was '%s'",
2850 ret
= PAM_SERVICE_ERR
;
2855 /* Deal with offline errors. */
2856 PAM_WB_REMARK_CHECK_RESPONSE(ctx
, response
,
2857 "NT_STATUS_NO_LOGON_SERVERS");
2858 PAM_WB_REMARK_CHECK_RESPONSE(ctx
, response
,
2859 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
2860 PAM_WB_REMARK_CHECK_RESPONSE(ctx
, response
,
2861 "NT_STATUS_ACCESS_DENIED");
2863 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx
, ret
);
2872 /* static module data */
2874 struct pam_module _pam_winbind_modstruct
= {
2876 pam_sm_authenticate
,
2879 pam_sm_open_session
,
2880 pam_sm_close_session
,
2887 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
2888 * Copyright (c) Tim Potter <tpot@samba.org> 2000
2889 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
2890 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
2891 * Copyright (c) Jan Rêkorajski 1999.
2892 * Copyright (c) Andrew G. Morgan 1996-8.
2893 * Copyright (c) Alex O. Yuriev, 1996.
2894 * Copyright (c) Cristian Gafton 1996.
2895 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
2897 * Redistribution and use in source and binary forms, with or without
2898 * modification, are permitted provided that the following conditions
2900 * 1. Redistributions of source code must retain the above copyright
2901 * notice, and the entire permission notice in its entirety,
2902 * including the disclaimer of warranties.
2903 * 2. Redistributions in binary form must reproduce the above copyright
2904 * notice, this list of conditions and the following disclaimer in the
2905 * documentation and/or other materials provided with the distribution.
2906 * 3. The name of the author may not be used to endorse or promote
2907 * products derived from this software without specific prior
2908 * written permission.
2910 * ALTERNATIVELY, this product may be distributed under the terms of
2911 * the GNU Public License, in which case the provisions of the GPL are
2912 * required INSTEAD OF the above restrictions. (This clause is
2913 * necessary due to a potential bad interaction between the GPL and
2914 * the restrictions contained in a BSD-style copyright.)
2916 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
2917 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
2918 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
2919 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
2920 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
2921 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
2922 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2923 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
2924 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
2925 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
2926 * OF THE POSSIBILITY OF SUCH DAMAGE.