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> 2005-2007
8 largely based on pam_userdb by Cristian Gafton <gafton@redhat.com>
9 also contains large slabs of code from pam_unix by Elliot Lee <sopwith@redhat.com>
10 (see copyright below for full details)
13 #include "pam_winbind.h"
15 #define _PAM_LOG_FUNCTION_ENTER(function, pamh, ctrl, flags) \
17 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: 0x%08x] ENTER: " function " (flags: 0x%04x)", (uint32) pamh, flags); \
18 _pam_log_state(pamh, ctrl); \
21 #define _PAM_LOG_FUNCTION_LEAVE(function, pamh, ctrl, retval) \
23 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: 0x%08x] LEAVE: " function " returning %d", (uint32) pamh, retval); \
24 _pam_log_state(pamh, ctrl); \
29 #define MAX_PASSWD_TRIES 3
32 * Work around the pam API that has functions with void ** as parameters.
33 * These lead to strict aliasing warnings with gcc.
35 static int _pam_get_item(const pam_handle_t
*pamh
, int item_type
,
38 const void **item
= (const void **)_item
;
39 return pam_get_item(pamh
, item_type
, item
);
41 static int _pam_get_data(const pam_handle_t
*pamh
,
42 const char *module_data_name
, const void *_data
)
44 const void **data
= (const void **)_data
;
45 return pam_get_data(pamh
, module_data_name
, data
);
50 #ifdef HAVE_PAM_VSYSLOG
51 static void _pam_log_int(const pam_handle_t
*pamh
, int err
, const char *format
, va_list args
)
53 pam_vsyslog(pamh
, err
, format
, args
);
56 static void _pam_log_int(const pam_handle_t
*pamh
, int err
, const char *format
, va_list args
)
61 _pam_get_item(pamh
, PAM_SERVICE
, &service
);
63 format2
= malloc(strlen(MODULE_NAME
)+strlen(format
)+strlen(service
)+5);
64 if (format2
== NULL
) {
65 /* what else todo ? */
66 vsyslog(err
, format
, args
);
70 sprintf(format2
, "%s(%s): %s", MODULE_NAME
, service
, format
);
71 vsyslog(err
, format2
, args
);
74 #endif /* HAVE_PAM_VSYSLOG */
76 static BOOL
_pam_log_is_silent(int ctrl
)
78 return on(ctrl
, WINBIND_SILENT
);
81 static void _pam_log(const pam_handle_t
*pamh
, int ctrl
, int err
, const char *format
, ...)
85 if (_pam_log_is_silent(ctrl
)) {
89 va_start(args
, format
);
90 _pam_log_int(pamh
, err
, format
, args
);
94 static BOOL
_pam_log_is_debug_enabled(int ctrl
)
100 if (_pam_log_is_silent(ctrl
)) {
104 if (!(ctrl
& WINBIND_DEBUG_ARG
)) {
111 static BOOL
_pam_log_is_debug_state_enabled(int ctrl
)
113 if (!(ctrl
& WINBIND_DEBUG_STATE
)) {
117 return _pam_log_is_debug_enabled(ctrl
);
120 static void _pam_log_debug(const pam_handle_t
*pamh
, int ctrl
, int err
, const char *format
, ...)
124 if (!_pam_log_is_debug_enabled(ctrl
)) {
128 va_start(args
, format
);
129 _pam_log_int(pamh
, err
, format
, args
);
133 static void _pam_log_state_datum(const pam_handle_t
*pamh
, int ctrl
, int item_type
, const char *key
, int is_string
)
135 const void *data
= NULL
;
136 if (item_type
!= 0) {
137 pam_get_item(pamh
, item_type
, &data
);
139 pam_get_data(pamh
, key
, &data
);
142 const char *type
= (item_type
!= 0) ? "ITEM" : "DATA";
143 if (is_string
!= 0) {
144 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
, "[pamh: 0x%08x] STATE: %s(%s) = \"%s\" (0x%08x)", (uint32
) pamh
, type
, key
, (const char *) data
, (uint32
) data
);
146 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
, "[pamh: 0x%08x] STATE: %s(%s) = 0x%08x", (uint32
) pamh
, type
, key
, (uint32
) data
);
151 #define _PAM_LOG_STATE_DATA_POINTER(pamh, ctrl, module_data_name) \
152 _pam_log_state_datum(pamh, ctrl, 0, module_data_name, 0)
154 #define _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, module_data_name) \
155 _pam_log_state_datum(pamh, ctrl, 0, module_data_name, 1)
157 #define _PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, item_type) \
158 _pam_log_state_datum(pamh, ctrl, item_type, #item_type, 0)
160 #define _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, item_type) \
161 _pam_log_state_datum(pamh, ctrl, item_type, #item_type, 1)
163 #ifdef DEBUG_PASSWORD
164 #define _LOG_PASSWORD_AS_STRING 1
166 #define _LOG_PASSWORD_AS_STRING 0
169 #define _PAM_LOG_STATE_ITEM_PASSWORD(pamh, ctrl, item_type) \
170 _pam_log_state_datum(pamh, ctrl, item_type, #item_type, _LOG_PASSWORD_AS_STRING)
172 static void _pam_log_state(const pam_handle_t
*pamh
, int ctrl
)
174 if (!_pam_log_is_debug_state_enabled(ctrl
)) {
178 _PAM_LOG_STATE_ITEM_STRING(pamh
, ctrl
, PAM_SERVICE
);
179 _PAM_LOG_STATE_ITEM_STRING(pamh
, ctrl
, PAM_USER
);
180 _PAM_LOG_STATE_ITEM_STRING(pamh
, ctrl
, PAM_TTY
);
181 _PAM_LOG_STATE_ITEM_STRING(pamh
, ctrl
, PAM_RHOST
);
182 _PAM_LOG_STATE_ITEM_STRING(pamh
, ctrl
, PAM_RUSER
);
183 _PAM_LOG_STATE_ITEM_PASSWORD(pamh
, ctrl
, PAM_OLDAUTHTOK
);
184 _PAM_LOG_STATE_ITEM_PASSWORD(pamh
, ctrl
, PAM_AUTHTOK
);
185 _PAM_LOG_STATE_ITEM_STRING(pamh
, ctrl
, PAM_USER_PROMPT
);
186 _PAM_LOG_STATE_ITEM_POINTER(pamh
, ctrl
, PAM_CONV
);
187 #ifdef PAM_FAIL_DELAY
188 _PAM_LOG_STATE_ITEM_POINTER(pamh
, ctrl
, PAM_FAIL_DELAY
);
190 #ifdef PAM_REPOSITORY
191 _PAM_LOG_STATE_ITEM_POINTER(pamh
, ctrl
, PAM_REPOSITORY
);
194 _PAM_LOG_STATE_DATA_STRING(pamh
, ctrl
, PAM_WINBIND_HOMEDIR
);
195 _PAM_LOG_STATE_DATA_STRING(pamh
, ctrl
, PAM_WINBIND_LOGONSCRIPT
);
196 _PAM_LOG_STATE_DATA_STRING(pamh
, ctrl
, PAM_WINBIND_PROFILEPATH
);
197 _PAM_LOG_STATE_DATA_STRING(pamh
, ctrl
, PAM_WINBIND_NEW_AUTHTOK_REQD
); /* Use atoi to get PAM result code */
198 _PAM_LOG_STATE_DATA_POINTER(pamh
, ctrl
, PAM_WINBIND_PWD_LAST_SET
);
201 static int _pam_parse(const pam_handle_t
*pamh
, int flags
, int argc
, const char **argv
, dictionary
**result_d
)
204 const char *config_file
= NULL
;
207 dictionary
*d
= NULL
;
209 if (flags
& PAM_SILENT
) {
210 ctrl
|= WINBIND_SILENT
;
213 for (i
=argc
,v
=argv
; i
-- > 0; ++v
) {
214 if (!strncasecmp(*v
, "config", strlen("config"))) {
215 ctrl
|= WINBIND_CONFIG_FILE
;
221 if (config_file
== NULL
) {
222 config_file
= PAM_WINBIND_CONFIG_FILE
;
225 d
= iniparser_load(config_file
);
227 goto config_from_pam
;
230 if (iniparser_getboolean(d
, "global:debug", False
)) {
231 ctrl
|= WINBIND_DEBUG_ARG
;
234 if (iniparser_getboolean(d
, "global:debug_state", False
)) {
235 ctrl
|= WINBIND_DEBUG_STATE
;
238 if (iniparser_getboolean(d
, "global:cached_login", False
)) {
239 ctrl
|= WINBIND_CACHED_LOGIN
;
242 if (iniparser_getboolean(d
, "global:krb5_auth", False
)) {
243 ctrl
|= WINBIND_KRB5_AUTH
;
246 if (iniparser_getboolean(d
, "global:silent", False
)) {
247 ctrl
|= WINBIND_SILENT
;
250 if (iniparser_getstr(d
, "global:krb5_ccache_type") != NULL
) {
251 ctrl
|= WINBIND_KRB5_CCACHE_TYPE
;
254 if ((iniparser_getstr(d
, "global:require-membership-of") != NULL
) ||
255 (iniparser_getstr(d
, "global:require_membership_of") != NULL
)) {
256 ctrl
|= WINBIND_REQUIRED_MEMBERSHIP
;
259 if (iniparser_getboolean(d
, "global:try_first_pass", False
)) {
260 ctrl
|= WINBIND_TRY_FIRST_PASS_ARG
;
264 /* step through arguments */
265 for (i
=argc
,v
=argv
; i
-- > 0; ++v
) {
267 /* generic options */
268 if (!strcmp(*v
,"debug"))
269 ctrl
|= WINBIND_DEBUG_ARG
;
270 else if (!strcasecmp(*v
, "debug_state"))
271 ctrl
|= WINBIND_DEBUG_STATE
;
272 else if (!strcasecmp(*v
, "use_authtok"))
273 ctrl
|= WINBIND_USE_AUTHTOK_ARG
;
274 else if (!strcasecmp(*v
, "use_first_pass"))
275 ctrl
|= WINBIND_USE_FIRST_PASS_ARG
;
276 else if (!strcasecmp(*v
, "try_first_pass"))
277 ctrl
|= WINBIND_TRY_FIRST_PASS_ARG
;
278 else if (!strcasecmp(*v
, "unknown_ok"))
279 ctrl
|= WINBIND_UNKNOWN_OK_ARG
;
280 else if (!strncasecmp(*v
, "require_membership_of", strlen("require_membership_of")))
281 ctrl
|= WINBIND_REQUIRED_MEMBERSHIP
;
282 else if (!strncasecmp(*v
, "require-membership-of", strlen("require-membership-of")))
283 ctrl
|= WINBIND_REQUIRED_MEMBERSHIP
;
284 else if (!strcasecmp(*v
, "krb5_auth"))
285 ctrl
|= WINBIND_KRB5_AUTH
;
286 else if (!strncasecmp(*v
, "krb5_ccache_type", strlen("krb5_ccache_type")))
287 ctrl
|= WINBIND_KRB5_CCACHE_TYPE
;
288 else if (!strcasecmp(*v
, "cached_login"))
289 ctrl
|= WINBIND_CACHED_LOGIN
;
291 _pam_log(pamh
, ctrl
, LOG_ERR
, "pam_parse: unknown option: %s", *v
);
301 iniparser_freedict(d
);
308 static void _pam_winbind_cleanup_func(pam_handle_t
*pamh
, void *data
, int error_status
)
310 int ctrl
= _pam_parse(pamh
, 0, 0, NULL
, NULL
);
311 if (_pam_log_is_debug_state_enabled(ctrl
)) {
312 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
, "[pamh: 0x%08x] CLEAN: cleaning up PAM data 0x%08x (error_status = %d)", (uint32
) pamh
, (uint32
) data
, error_status
);
318 static const struct ntstatus_errors
{
319 const char *ntstatus_string
;
320 const char *error_string
;
321 } ntstatus_errors
[] = {
322 {"NT_STATUS_OK", "Success"},
323 {"NT_STATUS_BACKUP_CONTROLLER", "No primary Domain Controler available"},
324 {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND", "No domain controllers found"},
325 {"NT_STATUS_NO_LOGON_SERVERS", "No logon servers"},
326 {"NT_STATUS_PWD_TOO_SHORT", "Password too short"},
327 {"NT_STATUS_PWD_TOO_RECENT", "The password of this user is too recent to change"},
328 {"NT_STATUS_PWD_HISTORY_CONFLICT", "Password is already in password history"},
329 {"NT_STATUS_PASSWORD_EXPIRED", "Your password has expired"},
330 {"NT_STATUS_PASSWORD_MUST_CHANGE", "You need to change your password now"},
331 {"NT_STATUS_INVALID_WORKSTATION", "You are not allowed to logon from this workstation"},
332 {"NT_STATUS_INVALID_LOGON_HOURS", "You are not allowed to logon at this time"},
333 {"NT_STATUS_ACCOUNT_EXPIRED", "Your account has expired. Please contact your System administrator"}, /* SCNR */
334 {"NT_STATUS_ACCOUNT_DISABLED", "Your account is disabled. Please contact your System administrator"}, /* SCNR */
335 {"NT_STATUS_ACCOUNT_LOCKED_OUT", "Your account has been locked. Please contact your System administrator"}, /* SCNR */
336 {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT", "Invalid Trust Account"},
337 {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT", "Invalid Trust Account"},
338 {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT", "Invalid Trust Account"},
339 {"NT_STATUS_ACCESS_DENIED", "Access is denied"},
343 const char *_get_ntstatus_error_string(const char *nt_status_string
)
346 for (i
=0; ntstatus_errors
[i
].ntstatus_string
!= NULL
; i
++) {
347 if (!strcasecmp(ntstatus_errors
[i
].ntstatus_string
, nt_status_string
)) {
348 return ntstatus_errors
[i
].error_string
;
354 /* --- authentication management functions --- */
356 /* Attempt a conversation */
358 static int converse(pam_handle_t
*pamh
, int nargs
,
359 struct pam_message
**message
,
360 struct pam_response
**response
)
363 struct pam_conv
*conv
;
365 retval
= _pam_get_item(pamh
, PAM_CONV
, &conv
);
366 if (retval
== PAM_SUCCESS
) {
367 retval
= conv
->conv(nargs
, (const struct pam_message
**)message
,
368 response
, conv
->appdata_ptr
);
371 return retval
; /* propagate error status */
375 static int _make_remark(pam_handle_t
* pamh
, int type
, const char *text
)
377 int retval
= PAM_SUCCESS
;
379 struct pam_message
*pmsg
[1], msg
[1];
380 struct pam_response
*resp
;
383 msg
[0].msg
= CONST_DISCARD(char *, text
);
384 msg
[0].msg_style
= type
;
387 retval
= converse(pamh
, 1, pmsg
, &resp
);
390 _pam_drop_reply(resp
, 1);
395 static int _make_remark_v(pam_handle_t
* pamh
, int type
, const char *format
, va_list args
)
400 ret
= vasprintf(&var
, format
, args
);
402 _pam_log(pamh
, 0, LOG_ERR
, "memory allocation failure");
406 ret
= _make_remark(pamh
, type
, var
);
411 static int _make_remark_format(pam_handle_t
* pamh
, int type
, const char *format
, ...)
416 va_start(args
, format
);
417 ret
= _make_remark_v(pamh
, type
, format
, args
);
422 static int pam_winbind_request(pam_handle_t
* pamh
, int ctrl
,
423 enum winbindd_cmd req_type
,
424 struct winbindd_request
*request
,
425 struct winbindd_response
*response
)
427 /* Fill in request and send down pipe */
428 init_request(request
, req_type
);
430 if (write_sock(request
, sizeof(*request
), 0) == -1) {
431 _pam_log(pamh
, ctrl
, LOG_ERR
, "pam_winbind_request: write to socket failed!");
433 return PAM_SERVICE_ERR
;
437 if (read_reply(response
) == -1) {
438 _pam_log(pamh
, ctrl
, LOG_ERR
, "pam_winbind_request: read from socket failed!");
440 return PAM_SERVICE_ERR
;
443 /* We are done with the socket - close it and avoid mischeif */
446 /* Copy reply data from socket */
447 if (response
->result
== WINBINDD_OK
) {
451 /* no need to check for pam_error codes for getpwnam() */
454 case WINBINDD_GETPWNAM
:
455 case WINBINDD_LOOKUPNAME
:
456 _pam_log(pamh
, ctrl
, LOG_ERR
, "request failed: %s, NT error was %s",
457 response
->data
.auth
.nt_status_string
);
458 return PAM_USER_UNKNOWN
;
463 if (response
->data
.auth
.pam_error
!= PAM_SUCCESS
) {
464 _pam_log(pamh
, ctrl
, LOG_ERR
, "request failed: %s, PAM error was %s (%d), NT error was %s",
465 response
->data
.auth
.error_string
,
466 pam_strerror(pamh
, response
->data
.auth
.pam_error
),
467 response
->data
.auth
.pam_error
,
468 response
->data
.auth
.nt_status_string
);
469 return response
->data
.auth
.pam_error
;
472 _pam_log(pamh
, ctrl
, LOG_ERR
, "request failed, but PAM error 0!");
474 return PAM_SERVICE_ERR
;
477 static int pam_winbind_request_log(pam_handle_t
* pamh
,
479 enum winbindd_cmd req_type
,
480 struct winbindd_request
*request
,
481 struct winbindd_response
*response
,
486 retval
= pam_winbind_request(pamh
, ctrl
, req_type
, request
, response
);
490 /* incorrect password */
491 _pam_log(pamh
, ctrl
, LOG_WARNING
, "user '%s' denied access (incorrect password or invalid membership)", user
);
493 case PAM_ACCT_EXPIRED
:
494 /* account expired */
495 _pam_log(pamh
, ctrl
, LOG_WARNING
, "user '%s' account expired", user
);
497 case PAM_AUTHTOK_EXPIRED
:
498 /* password expired */
499 _pam_log(pamh
, ctrl
, LOG_WARNING
, "user '%s' password expired", user
);
501 case PAM_NEW_AUTHTOK_REQD
:
502 /* new password required */
503 _pam_log(pamh
, ctrl
, LOG_WARNING
, "user '%s' new password required", user
);
505 case PAM_USER_UNKNOWN
:
506 /* the user does not exist */
507 _pam_log_debug(pamh
, ctrl
, LOG_NOTICE
, "user '%s' not found", user
);
508 if (ctrl
& WINBIND_UNKNOWN_OK_ARG
) {
513 if (req_type
== WINBINDD_PAM_AUTH
) {
514 /* Otherwise, the authentication looked good */
515 _pam_log(pamh
, ctrl
, LOG_NOTICE
, "user '%s' granted access", user
);
516 } else if (req_type
== WINBINDD_PAM_CHAUTHTOK
) {
517 /* Otherwise, the authentication looked good */
518 _pam_log(pamh
, ctrl
, LOG_NOTICE
, "user '%s' password changed", user
);
520 /* Otherwise, the authentication looked good */
521 _pam_log(pamh
, ctrl
, LOG_NOTICE
, "user '%s' OK", user
);
526 /* we don't know anything about this return value */
527 _pam_log(pamh
, ctrl
, LOG_ERR
, "internal module error (retval = %d, user = '%s')",
533 static BOOL
_pam_send_password_expiry_message(pam_handle_t
*pamh
, time_t next_change
, time_t now
)
536 struct tm tm_now
, tm_next_change
;
538 if ((next_change
< 0) ||
539 (next_change
< now
) ||
540 (next_change
> now
+ DAYS_TO_WARN_BEFORE_PWD_EXPIRES
* SECONDS_PER_DAY
)) {
544 if ((localtime_r(&now
, &tm_now
) == NULL
) ||
545 (localtime_r(&next_change
, &tm_next_change
) == NULL
)) {
549 days
= (tm_next_change
.tm_yday
+tm_next_change
.tm_year
*365) - (tm_now
.tm_yday
+tm_now
.tm_year
*365);
552 _make_remark(pamh
, PAM_TEXT_INFO
, "Your password expires today");
556 if (days
> 0 && days
< DAYS_TO_WARN_BEFORE_PWD_EXPIRES
) {
557 _make_remark_format(pamh
, PAM_TEXT_INFO
, "Your password will expire in %d %s",
558 days
, (days
> 1) ? "days":"day");
565 static void _pam_warn_password_expires_in_future(pam_handle_t
*pamh
, struct winbindd_response
*response
)
567 time_t now
= time(NULL
);
568 time_t next_change
= 0;
570 /* accounts with ACB_PWNOEXP set never receive a warning */
571 if (response
->data
.auth
.info3
.acct_flags
& ACB_PWNOEXP
) {
575 /* no point in sending a warning if this is a grace logon */
576 if (PAM_WB_GRACE_LOGON(response
->data
.auth
.info3
.user_flgs
)) {
580 /* check if the info3 must change timestamp has been set */
581 next_change
= response
->data
.auth
.info3
.pass_must_change_time
;
583 if (_pam_send_password_expiry_message(pamh
, next_change
, now
)) {
587 /* now check for the global password policy */
588 if (response
->data
.auth
.policy
.expire
<= 0) {
592 next_change
= response
->data
.auth
.info3
.pass_last_set_time
+
593 response
->data
.auth
.policy
.expire
;
595 if (_pam_send_password_expiry_message(pamh
, next_change
, now
)) {
599 /* no warning sent */
602 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
604 int safe_append_string(char *dest
,
606 int dest_buffer_size
)
608 * Append a string, making sure not to overflow and to always return a NULL-terminated
611 * @param dest Destination string buffer (must already be NULL-terminated).
612 * @param src Source string buffer.
613 * @param dest_buffer_size Size of dest buffer in bytes.
615 * @return 0 if dest buffer is not big enough (no bytes copied), non-zero on success.
618 int dest_length
= strlen(dest
);
619 int src_length
= strlen(src
);
621 if ( dest_length
+ src_length
+ 1 > dest_buffer_size
) {
625 memcpy(dest
+ dest_length
, src
, src_length
+ 1);
629 static int winbind_name_to_sid_string(pam_handle_t
*pamh
,
633 char *sid_list_buffer
,
634 int sid_list_buffer_size
)
636 * Convert a names into a SID string, appending it to a buffer.
638 * @param pamh PAM handle
639 * @param ctrl PAM winbind options.
640 * @param user User in PAM request.
641 * @param name Name to convert.
642 * @param sid_list_buffer Where to append the string sid.
643 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
645 * @return 0 on failure, non-zero on success.
648 const char* sid_string
;
649 struct winbindd_response sid_response
;
652 if (IS_SID_STRING(name
)) {
655 struct winbindd_request sid_request
;
657 ZERO_STRUCT(sid_request
);
658 ZERO_STRUCT(sid_response
);
660 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
, "no sid given, looking up: %s\n", name
);
662 /* fortunatly winbindd can handle non-separated names */
663 strncpy(sid_request
.data
.name
.name
, name
,
664 sizeof(sid_request
.data
.name
.name
) - 1);
666 if (pam_winbind_request_log(pamh
, ctrl
, WINBINDD_LOOKUPNAME
, &sid_request
, &sid_response
, user
)) {
667 _pam_log(pamh
, ctrl
, LOG_INFO
, "could not lookup name: %s\n", name
);
671 sid_string
= sid_response
.data
.sid
.sid
;
674 if (!safe_append_string(sid_list_buffer
, sid_string
, sid_list_buffer_size
)) {
681 static int winbind_name_list_to_sid_string_list(pam_handle_t
*pamh
,
684 const char *name_list
,
685 char *sid_list_buffer
,
686 int sid_list_buffer_size
)
688 * Convert a list of names into a list of sids.
690 * @param pamh PAM handle
691 * @param ctrl PAM winbind options.
692 * @param user User in PAM request.
693 * @param name_list List of names or string sids, separated by commas.
694 * @param sid_list_buffer Where to put the list of string sids.
695 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
697 * @return 0 on failure, non-zero on success.
701 char *current_name
= NULL
;
702 const char *search_location
;
705 if ( sid_list_buffer_size
> 0 ) {
706 sid_list_buffer
[0] = 0;
709 search_location
= name_list
;
710 while ( (comma
= strstr(search_location
, ",")) != NULL
) {
711 current_name
= strndup(search_location
, comma
- search_location
);
712 if (NULL
== current_name
) {
716 if (!winbind_name_to_sid_string(pamh
, ctrl
, user
, current_name
, sid_list_buffer
, sid_list_buffer_size
)) {
720 SAFE_FREE(current_name
);
722 if (!safe_append_string(sid_list_buffer
, ",", sid_list_buffer_size
)) {
726 search_location
= comma
+ 1;
729 if (!winbind_name_to_sid_string(pamh
, ctrl
, user
, search_location
, sid_list_buffer
, sid_list_buffer_size
)) {
736 SAFE_FREE(current_name
);
741 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
743 * @param response The struct winbindd_response.
745 * @return string (caller needs to free).
748 static char *_pam_compose_pwd_restriction_string(struct winbindd_response
*response
)
751 size_t offset
= 0, ret
= 0, str_size
= 1024;
753 str
= (char *)malloc(str_size
);
758 memset(str
, '\0', str_size
);
760 offset
= snprintf(str
, str_size
, "Your password ");
765 if (response
->data
.auth
.policy
.min_length_password
> 0) {
766 ret
= snprintf(str
+offset
, str_size
-offset
,
767 "must be at least %d characters; ",
768 response
->data
.auth
.policy
.min_length_password
);
775 if (response
->data
.auth
.policy
.password_history
> 0) {
776 ret
= snprintf(str
+offset
, str_size
-offset
,
777 "cannot repeat any of your previous %d passwords; ",
778 response
->data
.auth
.policy
.password_history
);
785 if (response
->data
.auth
.policy
.password_properties
& DOMAIN_PASSWORD_COMPLEX
) {
786 ret
= snprintf(str
+offset
, str_size
-offset
,
787 "must contain capitals, numerals or punctuation; "
788 "and cannot contain your account or full name; ");
795 ret
= snprintf(str
+offset
, str_size
-offset
,
796 "Please type a different password. "
797 "Type a password which meets these requirements in both text boxes.");
809 /* talk to winbindd */
810 static int winbind_auth_request(pam_handle_t
* pamh
,
816 struct winbindd_response
*p_response
,
817 time_t *pwd_last_set
,
820 struct winbindd_request request
;
821 struct winbindd_response response
;
824 ZERO_STRUCT(request
);
825 ZERO_STRUCT(response
);
831 strncpy(request
.data
.auth
.user
, user
,
832 sizeof(request
.data
.auth
.user
)-1);
834 strncpy(request
.data
.auth
.pass
, pass
,
835 sizeof(request
.data
.auth
.pass
)-1);
837 request
.data
.auth
.krb5_cc_type
[0] = '\0';
838 request
.data
.auth
.uid
= -1;
840 request
.flags
= WBFLAG_PAM_INFO3_TEXT
| WBFLAG_PAM_CONTACT_TRUSTDOM
;
842 if (ctrl
& WINBIND_KRB5_AUTH
) {
844 struct passwd
*pwd
= NULL
;
846 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
, "enabling krb5 login flag\n");
848 request
.flags
|= WBFLAG_PAM_KRB5
| WBFLAG_PAM_FALLBACK_AFTER_KRB5
;
850 pwd
= getpwnam(user
);
852 return PAM_USER_UNKNOWN
;
854 request
.data
.auth
.uid
= pwd
->pw_uid
;
857 if (ctrl
& WINBIND_CACHED_LOGIN
) {
858 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
, "enabling cached login flag\n");
859 request
.flags
|= WBFLAG_PAM_CACHED_LOGIN
;
864 request
.flags
|= WBFLAG_PAM_UNIX_NAME
;
867 if (cctype
!= NULL
) {
868 strncpy(request
.data
.auth
.krb5_cc_type
, cctype
,
869 sizeof(request
.data
.auth
.krb5_cc_type
) - 1);
870 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
, "enabling request for a %s krb5 ccache\n", cctype
);
873 request
.data
.auth
.require_membership_of_sid
[0] = '\0';
875 if (member
!= NULL
) {
877 if (!winbind_name_list_to_sid_string_list(pamh
, ctrl
, user
, member
,
878 request
.data
.auth
.require_membership_of_sid
,
879 sizeof(request
.data
.auth
.require_membership_of_sid
))) {
881 _pam_log_debug(pamh
, ctrl
, LOG_ERR
, "failed to serialize membership of sid \"%s\"\n", member
);
886 ret
= pam_winbind_request_log(pamh
, ctrl
, WINBINDD_PAM_AUTH
, &request
, &response
, user
);
889 *pwd_last_set
= response
.data
.auth
.info3
.pass_last_set_time
;
892 if ((ctrl
& WINBIND_KRB5_AUTH
) &&
893 response
.data
.auth
.krb5ccname
[0] != '\0') {
897 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
, "request returned KRB5CCNAME: %s",
898 response
.data
.auth
.krb5ccname
);
900 snprintf(var
, sizeof(var
), "KRB5CCNAME=%s", response
.data
.auth
.krb5ccname
);
902 ret
= pam_putenv(pamh
, var
);
903 if (ret
!= PAM_SUCCESS
) {
904 _pam_log(pamh
, ctrl
, LOG_ERR
, "failed to set KRB5CCNAME to %s", var
);
910 /* We want to process the response in the caller. */
911 *p_response
= response
;
916 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_PASSWORD_EXPIRED");
917 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_PASSWORD_MUST_CHANGE");
918 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_INVALID_WORKSTATION");
919 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_INVALID_LOGON_HOURS");
920 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_ACCOUNT_EXPIRED");
921 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_ACCOUNT_DISABLED");
922 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_ACCOUNT_LOCKED_OUT");
923 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT");
924 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT");
925 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT");
926 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
927 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_NO_LOGON_SERVERS");
930 /* handle the case where the auth was ok, but the password must expire right now */
931 /* good catch from Ralf Haferkamp: an expiry of "never" is translated to -1 */
932 if ( ! (response
.data
.auth
.info3
.acct_flags
& ACB_PWNOEXP
) &&
933 ! (PAM_WB_GRACE_LOGON(response
.data
.auth
.info3
.user_flgs
)) &&
934 (response
.data
.auth
.policy
.expire
> 0) &&
935 (response
.data
.auth
.info3
.pass_last_set_time
+ response
.data
.auth
.policy
.expire
< time(NULL
))) {
937 ret
= PAM_AUTHTOK_EXPIRED
;
939 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
,"Password has expired (Password was last set: %d, "
940 "the policy says it should expire here %d (now it's: %d)\n",
941 response
.data
.auth
.info3
.pass_last_set_time
,
942 response
.data
.auth
.info3
.pass_last_set_time
+ response
.data
.auth
.policy
.expire
,
945 PAM_WB_REMARK_DIRECT_RET(pamh
, "NT_STATUS_PASSWORD_EXPIRED");
949 /* warn a user if the password is about to expire soon */
950 _pam_warn_password_expires_in_future(pamh
, &response
);
952 /* inform about logon type */
953 if (PAM_WB_GRACE_LOGON(response
.data
.auth
.info3
.user_flgs
)) {
955 _make_remark(pamh
, PAM_ERROR_MSG
,
956 "Grace login. Please change your password as soon you're online again");
957 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
,
958 "User %s logged on using grace logon\n", user
);
960 } else if (PAM_WB_CACHED_LOGON(response
.data
.auth
.info3
.user_flgs
)) {
962 _make_remark(pamh
, PAM_ERROR_MSG
,
963 "Logging on using cached account. Network resources can be unavailable");
964 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
,
965 "User %s logged on using cached account\n", user
);
968 /* save the CIFS homedir for pam_cifs / pam_mount */
969 if (response
.data
.auth
.info3
.home_dir
[0] != '\0') {
971 int ret2
= pam_set_data(pamh
, PAM_WINBIND_HOMEDIR
,
972 (void *) strdup(response
.data
.auth
.info3
.home_dir
),
973 _pam_winbind_cleanup_func
);
975 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
, "Could not set data: %s",
976 pam_strerror(pamh
, ret2
));
981 /* save the logon script path for other PAM modules */
982 if (response
.data
.auth
.info3
.logon_script
[0] != '\0') {
984 int ret2
= pam_set_data(pamh
, PAM_WINBIND_LOGONSCRIPT
,
985 (void *) strdup(response
.data
.auth
.info3
.logon_script
),
986 _pam_winbind_cleanup_func
);
988 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
, "Could not set data: %s",
989 pam_strerror(pamh
, ret2
));
993 /* save the profile path for other PAM modules */
994 if (response
.data
.auth
.info3
.profile_path
[0] != '\0') {
996 int ret2
= pam_set_data(pamh
, PAM_WINBIND_PROFILEPATH
,
997 (void *) strdup(response
.data
.auth
.info3
.profile_path
),
998 _pam_winbind_cleanup_func
);
1000 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
, "Could not set data: %s",
1001 pam_strerror(pamh
, ret2
));
1005 /* If winbindd returned a username, return the pointer to it here. */
1006 if (user_ret
&& response
.extra_data
.data
) {
1007 /* We have to trust it's a null terminated string. */
1008 *user_ret
= (char *)response
.extra_data
.data
;
1014 /* talk to winbindd */
1015 static int winbind_chauthtok_request(pam_handle_t
* pamh
,
1018 const char *oldpass
,
1019 const char *newpass
,
1020 time_t pwd_last_set
)
1022 struct winbindd_request request
;
1023 struct winbindd_response response
;
1026 ZERO_STRUCT(request
);
1027 ZERO_STRUCT(response
);
1029 if (request
.data
.chauthtok
.user
== NULL
) return -2;
1031 strncpy(request
.data
.chauthtok
.user
, user
,
1032 sizeof(request
.data
.chauthtok
.user
) - 1);
1034 if (oldpass
!= NULL
) {
1035 strncpy(request
.data
.chauthtok
.oldpass
, oldpass
,
1036 sizeof(request
.data
.chauthtok
.oldpass
) - 1);
1038 request
.data
.chauthtok
.oldpass
[0] = '\0';
1041 if (newpass
!= NULL
) {
1042 strncpy(request
.data
.chauthtok
.newpass
, newpass
,
1043 sizeof(request
.data
.chauthtok
.newpass
) - 1);
1045 request
.data
.chauthtok
.newpass
[0] = '\0';
1048 if (ctrl
& WINBIND_KRB5_AUTH
) {
1049 request
.flags
= WBFLAG_PAM_KRB5
| WBFLAG_PAM_CONTACT_TRUSTDOM
;
1052 ret
= pam_winbind_request_log(pamh
, ctrl
, WINBINDD_PAM_CHAUTHTOK
, &request
, &response
, user
);
1054 if (ret
== PAM_SUCCESS
) {
1058 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_BACKUP_CONTROLLER");
1059 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
1060 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_NO_LOGON_SERVERS");
1061 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_ACCESS_DENIED");
1063 /* TODO: tell the min pwd length ? */
1064 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_PWD_TOO_SHORT");
1066 /* TODO: tell the minage ? */
1067 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_PWD_TOO_RECENT");
1069 /* TODO: tell the history length ? */
1070 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
, response
, "NT_STATUS_PWD_HISTORY_CONFLICT");
1072 if (!strcasecmp(response
.data
.auth
.nt_status_string
, "NT_STATUS_PASSWORD_RESTRICTION")) {
1074 char *pwd_restriction_string
= NULL
;
1076 /* FIXME: avoid to send multiple PAM messages after another */
1077 switch (response
.data
.auth
.reject_reason
) {
1080 case REJECT_REASON_OTHER
:
1081 if ((response
.data
.auth
.policy
.min_passwordage
> 0) &&
1082 (pwd_last_set
+ response
.data
.auth
.policy
.min_passwordage
> time(NULL
))) {
1083 PAM_WB_REMARK_DIRECT(pamh
, "NT_STATUS_PWD_TOO_RECENT");
1086 case REJECT_REASON_TOO_SHORT
:
1087 PAM_WB_REMARK_DIRECT(pamh
, "NT_STATUS_PWD_TOO_SHORT");
1089 case REJECT_REASON_IN_HISTORY
:
1090 PAM_WB_REMARK_DIRECT(pamh
, "NT_STATUS_PWD_HISTORY_CONFLICT");
1092 case REJECT_REASON_NOT_COMPLEX
:
1093 _make_remark(pamh
, PAM_ERROR_MSG
, "Password does not meet complexity requirements");
1096 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
,
1097 "unknown password change reject reason: %d",
1098 response
.data
.auth
.reject_reason
);
1102 pwd_restriction_string
= _pam_compose_pwd_restriction_string(&response
);
1103 if (pwd_restriction_string
) {
1104 _make_remark(pamh
, PAM_ERROR_MSG
, pwd_restriction_string
);
1105 SAFE_FREE(pwd_restriction_string
);
1113 * Checks if a user has an account
1116 * 1 = User not found
1120 static int valid_user(pam_handle_t
*pamh
, int ctrl
, const char *user
)
1122 /* check not only if the user is available over NSS calls, also make
1123 * sure it's really a winbind user, this is important when stacking PAM
1124 * modules in the 'account' or 'password' facility. */
1126 struct passwd
*pwd
= NULL
;
1127 struct winbindd_request request
;
1128 struct winbindd_response response
;
1131 ZERO_STRUCT(request
);
1132 ZERO_STRUCT(response
);
1134 pwd
= getpwnam(user
);
1139 strncpy(request
.data
.username
, user
,
1140 sizeof(request
.data
.username
) - 1);
1142 ret
= pam_winbind_request_log(pamh
, ctrl
, WINBINDD_GETPWNAM
, &request
, &response
, user
);
1145 case PAM_USER_UNKNOWN
:
1155 static char *_pam_delete(register char *xx
)
1163 * obtain a password from the user
1166 static int _winbind_read_password(pam_handle_t
* pamh
,
1168 const char *comment
,
1169 const char *prompt1
,
1170 const char *prompt2
,
1178 _pam_log(pamh
, ctrl
, LOG_DEBUG
, "getting password (0x%08x)", ctrl
);
1181 * make sure nothing inappropriate gets returned
1184 *pass
= token
= NULL
;
1187 * which authentication token are we getting?
1190 authtok_flag
= on(WINBIND__OLD_PASSWORD
, ctrl
) ? PAM_OLDAUTHTOK
: PAM_AUTHTOK
;
1193 * should we obtain the password from a PAM item ?
1196 if (on(WINBIND_TRY_FIRST_PASS_ARG
, ctrl
) || on(WINBIND_USE_FIRST_PASS_ARG
, ctrl
)) {
1197 retval
= _pam_get_item(pamh
, authtok_flag
, &item
);
1198 if (retval
!= PAM_SUCCESS
) {
1200 _pam_log(pamh
, ctrl
, LOG_ALERT
,
1201 "pam_get_item returned error to unix-read-password"
1204 } else if (item
!= NULL
) { /* we have a password! */
1207 _pam_log(pamh
, ctrl
, LOG_DEBUG
,
1208 "pam_get_item returned a password");
1210 } else if (on(WINBIND_USE_FIRST_PASS_ARG
, ctrl
)) {
1211 return PAM_AUTHTOK_RECOVER_ERR
; /* didn't work */
1212 } else if (on(WINBIND_USE_AUTHTOK_ARG
, ctrl
)
1213 && off(WINBIND__OLD_PASSWORD
, ctrl
)) {
1214 return PAM_AUTHTOK_RECOVER_ERR
;
1218 * getting here implies we will have to get the password from the
1223 struct pam_message msg
[3], *pmsg
[3];
1224 struct pam_response
*resp
;
1227 /* prepare to converse */
1229 if (comment
!= NULL
) {
1231 msg
[0].msg_style
= PAM_TEXT_INFO
;
1232 msg
[0].msg
= CONST_DISCARD(char *, comment
);
1239 msg
[i
].msg_style
= PAM_PROMPT_ECHO_OFF
;
1240 msg
[i
++].msg
= CONST_DISCARD(char *, prompt1
);
1243 if (prompt2
!= NULL
) {
1245 msg
[i
].msg_style
= PAM_PROMPT_ECHO_OFF
;
1246 msg
[i
++].msg
= CONST_DISCARD(char *, prompt2
);
1249 /* so call the conversation expecting i responses */
1251 retval
= converse(pamh
, i
, pmsg
, &resp
);
1255 /* interpret the response */
1257 if (retval
== PAM_SUCCESS
) { /* a good conversation */
1259 token
= x_strdup(resp
[i
- replies
].resp
);
1260 if (token
!= NULL
) {
1262 /* verify that password entered correctly */
1263 if (!resp
[i
- 1].resp
1264 || strcmp(token
, resp
[i
- 1].resp
)) {
1265 _pam_delete(token
); /* mistyped */
1266 retval
= PAM_AUTHTOK_RECOVER_ERR
;
1267 _make_remark(pamh
, PAM_ERROR_MSG
, MISTYPED_PASS
);
1271 _pam_log(pamh
, ctrl
, LOG_NOTICE
, "could not recover authentication token");
1272 retval
= PAM_AUTHTOK_RECOVER_ERR
;
1277 * tidy up the conversation (resp_retcode) is ignored
1278 * -- what is it for anyway? AGM
1281 _pam_drop_reply(resp
, i
);
1284 retval
= (retval
== PAM_SUCCESS
)
1285 ? PAM_AUTHTOK_RECOVER_ERR
: retval
;
1289 if (retval
!= PAM_SUCCESS
) {
1290 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
,
1291 "unable to obtain a password");
1294 /* 'token' is the entered password */
1296 /* we store this password as an item */
1298 retval
= pam_set_item(pamh
, authtok_flag
, token
);
1299 _pam_delete(token
); /* clean it up */
1300 if (retval
!= PAM_SUCCESS
||
1301 (retval
= _pam_get_item(pamh
, authtok_flag
, &item
)) != PAM_SUCCESS
) {
1303 _pam_log(pamh
, ctrl
, LOG_CRIT
, "error manipulating password");
1309 item
= NULL
; /* break link to password */
1314 const char *get_conf_item_string(const pam_handle_t
*pamh
,
1323 const char *parm_opt
= NULL
;
1326 if (!(ctrl
& config_flag
)) {
1330 /* let the pam opt take precedence over the pam_winbind.conf option */
1334 if (!asprintf(&key
, "global:%s", item
)) {
1338 parm_opt
= iniparser_getstr(d
, key
);
1342 for ( i
=0; i
<argc
; i
++ ) {
1344 if ((strncmp(argv
[i
], item
, strlen(item
)) == 0)) {
1347 if ( (p
= strchr( argv
[i
], '=' )) == NULL
) {
1348 _pam_log(pamh
, ctrl
, LOG_INFO
, "no \"=\" delimiter for \"%s\" found\n", item
);
1351 _pam_log_debug(pamh
, ctrl
, LOG_INFO
, "PAM config: %s '%s'\n", item
, p
+1);
1357 _pam_log_debug(pamh
, ctrl
, LOG_INFO
, "CONFIG file: %s '%s'\n", item
, parm_opt
);
1363 const char *get_krb5_cc_type_from_config(const pam_handle_t
*pamh
, int argc
, const char **argv
, int ctrl
, dictionary
*d
)
1365 return get_conf_item_string(pamh
, argc
, argv
, ctrl
, d
, "krb5_ccache_type", WINBIND_KRB5_CCACHE_TYPE
);
1368 const char *get_member_from_config(const pam_handle_t
*pamh
, int argc
, const char **argv
, int ctrl
, dictionary
*d
)
1370 const char *ret
= NULL
;
1371 ret
= get_conf_item_string(pamh
, argc
, argv
, ctrl
, d
, "require_membership_of", WINBIND_REQUIRED_MEMBERSHIP
);
1375 return get_conf_item_string(pamh
, argc
, argv
, ctrl
, d
, "require-membership-of", WINBIND_REQUIRED_MEMBERSHIP
);
1379 int pam_sm_authenticate(pam_handle_t
*pamh
, int flags
,
1380 int argc
, const char **argv
)
1382 const char *username
;
1383 const char *password
;
1384 const char *member
= NULL
;
1385 const char *cctype
= NULL
;
1386 int retval
= PAM_AUTH_ERR
;
1387 dictionary
*d
= NULL
;
1388 char *username_ret
= NULL
;
1389 char *new_authtok_required
= NULL
;
1391 /* parse arguments */
1392 int ctrl
= _pam_parse(pamh
, flags
, argc
, argv
, &d
);
1394 retval
= PAM_SYSTEM_ERR
;
1398 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", pamh
, ctrl
, flags
);
1400 /* Get the username */
1401 retval
= pam_get_user(pamh
, &username
, NULL
);
1402 if ((retval
!= PAM_SUCCESS
) || (!username
)) {
1403 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
, "can not get the username");
1404 retval
= PAM_SERVICE_ERR
;
1408 retval
= _winbind_read_password(pamh
, ctrl
, NULL
,
1412 if (retval
!= PAM_SUCCESS
) {
1413 _pam_log(pamh
, ctrl
, LOG_ERR
, "Could not retrieve user's password");
1414 retval
= PAM_AUTHTOK_ERR
;
1418 /* Let's not give too much away in the log file */
1420 #ifdef DEBUG_PASSWORD
1421 _pam_log_debug(pamh
, ctrl
, LOG_INFO
, "Verify user '%s' with password '%s'",
1422 username
, password
);
1424 _pam_log_debug(pamh
, ctrl
, LOG_INFO
, "Verify user '%s'", username
);
1427 member
= get_member_from_config(pamh
, argc
, argv
, ctrl
, d
);
1429 cctype
= get_krb5_cc_type_from_config(pamh
, argc
, argv
, ctrl
, d
);
1431 /* Now use the username to look up password */
1432 retval
= winbind_auth_request(pamh
, ctrl
, username
, password
, member
,
1433 cctype
, NULL
, NULL
, &username_ret
);
1435 if (retval
== PAM_NEW_AUTHTOK_REQD
||
1436 retval
== PAM_AUTHTOK_EXPIRED
) {
1438 if (!asprintf(&new_authtok_required
, "%d", retval
)) {
1439 retval
= PAM_BUF_ERR
;
1443 pam_set_data(pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD
, new_authtok_required
, _pam_winbind_cleanup_func
);
1445 retval
= PAM_SUCCESS
;
1451 pam_set_item (pamh
, PAM_USER
, username_ret
);
1452 _pam_log_debug(pamh
, ctrl
, LOG_INFO
, "Returned user was '%s'", username_ret
);
1457 iniparser_freedict(d
);
1460 if (!new_authtok_required
) {
1461 pam_set_data(pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD
, NULL
, NULL
);
1464 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", pamh
, ctrl
, retval
);
1470 int pam_sm_setcred(pam_handle_t
*pamh
, int flags
,
1471 int argc
, const char **argv
)
1473 int ret
= PAM_SYSTEM_ERR
;
1474 dictionary
*d
= NULL
;
1476 /* parse arguments */
1477 int ctrl
= _pam_parse(pamh
, flags
, argc
, argv
, &d
);
1479 ret
= PAM_SYSTEM_ERR
;
1483 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", pamh
, ctrl
, flags
);
1485 switch (flags
& ~PAM_SILENT
) {
1487 case PAM_DELETE_CRED
:
1488 ret
= pam_sm_close_session(pamh
, flags
, argc
, argv
);
1490 case PAM_REFRESH_CRED
:
1491 _pam_log_debug(pamh
, ctrl
, LOG_WARNING
, "PAM_REFRESH_CRED not implemented");
1494 case PAM_REINITIALIZE_CRED
:
1495 _pam_log_debug(pamh
, ctrl
, LOG_WARNING
, "PAM_REINITIALIZE_CRED not implemented");
1498 case PAM_ESTABLISH_CRED
:
1499 _pam_log_debug(pamh
, ctrl
, LOG_WARNING
, "PAM_ESTABLISH_CRED not implemented");
1503 ret
= PAM_SYSTEM_ERR
;
1509 iniparser_freedict(d
);
1512 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", pamh
, ctrl
, ret
);
1518 * Account management. We want to verify that the account exists
1519 * before returning PAM_SUCCESS
1522 int pam_sm_acct_mgmt(pam_handle_t
*pamh
, int flags
,
1523 int argc
, const char **argv
)
1525 const char *username
;
1526 int ret
= PAM_USER_UNKNOWN
;
1528 dictionary
*d
= NULL
;
1530 /* parse arguments */
1531 int ctrl
= _pam_parse(pamh
, flags
, argc
, argv
, &d
);
1533 return PAM_SYSTEM_ERR
;
1536 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", pamh
, ctrl
, flags
);
1539 /* Get the username */
1540 ret
= pam_get_user(pamh
, &username
, NULL
);
1541 if ((ret
!= PAM_SUCCESS
) || (!username
)) {
1542 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
,"can not get the username");
1543 ret
= PAM_SERVICE_ERR
;
1547 /* Verify the username */
1548 ret
= valid_user(pamh
, ctrl
, username
);
1551 /* some sort of system error. The log was already printed */
1552 ret
= PAM_SERVICE_ERR
;
1555 /* the user does not exist */
1556 _pam_log_debug(pamh
, ctrl
, LOG_NOTICE
, "user '%s' not found", username
);
1557 if (ctrl
& WINBIND_UNKNOWN_OK_ARG
) {
1561 ret
= PAM_USER_UNKNOWN
;
1564 pam_get_data( pamh
, PAM_WINBIND_NEW_AUTHTOK_REQD
, (const void **)&tmp
);
1566 ret
= atoi((const char *)tmp
);
1568 case PAM_AUTHTOK_EXPIRED
:
1569 /* fall through, since new token is required in this case */
1570 case PAM_NEW_AUTHTOK_REQD
:
1571 _pam_log(pamh
, ctrl
, LOG_WARNING
, "pam_sm_acct_mgmt success but %s is set",
1572 PAM_WINBIND_NEW_AUTHTOK_REQD
);
1573 _pam_log(pamh
, ctrl
, LOG_NOTICE
, "user '%s' needs new password", username
);
1574 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
1575 ret
= PAM_NEW_AUTHTOK_REQD
;
1578 _pam_log(pamh
, ctrl
, LOG_WARNING
, "pam_sm_acct_mgmt success");
1579 _pam_log(pamh
, ctrl
, LOG_NOTICE
, "user '%s' granted access", username
);
1585 /* Otherwise, the authentication looked good */
1586 _pam_log(pamh
, ctrl
, LOG_NOTICE
, "user '%s' granted access", username
);
1590 /* we don't know anything about this return value */
1591 _pam_log(pamh
, ctrl
, LOG_ERR
, "internal module error (ret = %d, user = '%s')",
1593 ret
= PAM_SERVICE_ERR
;
1597 /* should not be reached */
1603 iniparser_freedict(d
);
1606 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", pamh
, ctrl
, ret
);
1612 int pam_sm_open_session(pam_handle_t
*pamh
, int flags
,
1613 int argc
, const char **argv
)
1615 int ret
= PAM_SYSTEM_ERR
;
1616 dictionary
*d
= NULL
;
1618 /* parse arguments */
1619 int ctrl
= _pam_parse(pamh
, flags
, argc
, argv
, &d
);
1621 ret
= PAM_SYSTEM_ERR
;
1625 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", pamh
, ctrl
, flags
);
1631 iniparser_freedict(d
);
1634 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", pamh
, ctrl
, ret
);
1640 int pam_sm_close_session(pam_handle_t
*pamh
, int flags
,
1641 int argc
, const char **argv
)
1643 dictionary
*d
= NULL
;
1644 int retval
= PAM_SUCCESS
;
1646 /* parse arguments */
1647 int ctrl
= _pam_parse(pamh
, flags
, argc
, argv
, &d
);
1649 retval
= PAM_SYSTEM_ERR
;
1653 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", pamh
, ctrl
, flags
);
1655 if (!(flags
& PAM_DELETE_CRED
)) {
1656 retval
= PAM_SUCCESS
;
1660 if (ctrl
& WINBIND_KRB5_AUTH
) {
1662 /* destroy the ccache here */
1663 struct winbindd_request request
;
1664 struct winbindd_response response
;
1666 const char *ccname
= NULL
;
1667 struct passwd
*pwd
= NULL
;
1669 ZERO_STRUCT(request
);
1670 ZERO_STRUCT(response
);
1672 retval
= pam_get_user(pamh
, &user
, "Username: ");
1674 _pam_log(pamh
, ctrl
, LOG_ERR
, "could not identify user");
1679 _pam_log(pamh
, ctrl
, LOG_ERR
, "username was NULL!");
1680 retval
= PAM_USER_UNKNOWN
;
1684 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
, "username [%s] obtained", user
);
1686 ccname
= pam_getenv(pamh
, "KRB5CCNAME");
1687 if (ccname
== NULL
) {
1688 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
, "user has no KRB5CCNAME environment");
1691 strncpy(request
.data
.logoff
.user
, user
,
1692 sizeof(request
.data
.logoff
.user
) - 1);
1695 strncpy(request
.data
.logoff
.krb5ccname
, ccname
,
1696 sizeof(request
.data
.logoff
.krb5ccname
) - 1);
1699 pwd
= getpwnam(user
);
1701 retval
= PAM_USER_UNKNOWN
;
1704 request
.data
.logoff
.uid
= pwd
->pw_uid
;
1706 request
.flags
= WBFLAG_PAM_KRB5
| WBFLAG_PAM_CONTACT_TRUSTDOM
;
1708 retval
= pam_winbind_request_log(pamh
, ctrl
, WINBINDD_PAM_LOGOFF
, &request
, &response
, user
);
1713 iniparser_freedict(d
);
1716 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", pamh
, ctrl
, retval
);
1724 int pam_sm_chauthtok(pam_handle_t
* pamh
, int flags
,
1725 int argc
, const char **argv
)
1731 /* <DO NOT free() THESE> */
1733 char *pass_old
, *pass_new
;
1734 /* </DO NOT free() THESE> */
1739 dictionary
*d
= NULL
;
1741 ctrl
= _pam_parse(pamh
, flags
, argc
, argv
, &d
);
1743 ret
= PAM_SYSTEM_ERR
;
1747 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", pamh
, ctrl
, flags
);
1749 /* clearing offline bit for the auth in the password change */
1750 ctrl
&= ~WINBIND_CACHED_LOGIN
;
1753 * First get the name of a user
1755 ret
= pam_get_user(pamh
, &user
, "Username: ");
1757 _pam_log(pamh
, ctrl
, LOG_ERR
,
1758 "password - could not identify user");
1763 _pam_log(pamh
, ctrl
, LOG_ERR
, "username was NULL!");
1764 ret
= PAM_USER_UNKNOWN
;
1768 _pam_log_debug(pamh
, ctrl
, LOG_DEBUG
, "username [%s] obtained", user
);
1770 /* check if this is really a user in winbindd, not only in NSS */
1771 ret
= valid_user(pamh
, ctrl
, user
);
1774 ret
= PAM_USER_UNKNOWN
;
1777 ret
= PAM_SYSTEM_ERR
;
1784 * obtain and verify the current password (OLDAUTHTOK) for
1788 if (flags
& PAM_PRELIM_CHECK
) {
1789 struct winbindd_response response
;
1790 time_t pwdlastset_prelim
= 0;
1792 /* instruct user what is happening */
1793 #define greeting "Changing password for "
1794 Announce
= (char *) malloc(sizeof(greeting
) + strlen(user
));
1795 if (Announce
== NULL
) {
1796 _pam_log(pamh
, ctrl
, LOG_CRIT
, "password - out of memory");
1800 (void) strcpy(Announce
, greeting
);
1801 (void) strcpy(Announce
+ sizeof(greeting
) - 1, user
);
1804 lctrl
= ctrl
| WINBIND__OLD_PASSWORD
;
1805 ret
= _winbind_read_password(pamh
, lctrl
,
1807 "(current) NT password: ",
1809 (const char **) &pass_old
);
1810 if (ret
!= PAM_SUCCESS
) {
1811 _pam_log(pamh
, ctrl
, LOG_NOTICE
, "password - (old) token not obtained");
1815 /* We don't need krb5 env set for password change test. */
1816 ctrl
&= ~WINBIND_KRB5_AUTH
;
1818 /* verify that this is the password for this user */
1820 ret
= winbind_auth_request(pamh
, ctrl
, user
, pass_old
,
1821 NULL
, NULL
, &response
, &pwdlastset_prelim
, NULL
);
1823 if (ret
!= PAM_ACCT_EXPIRED
&&
1824 ret
!= PAM_AUTHTOK_EXPIRED
&&
1825 ret
!= PAM_NEW_AUTHTOK_REQD
&&
1826 ret
!= PAM_SUCCESS
) {
1829 iniparser_freedict(d
);
1831 /* Deal with offline errors. */
1832 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
,
1834 "NT_STATUS_NO_LOGON_SERVERS");
1835 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
,
1837 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
1838 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
,
1840 "NT_STATUS_ACCESS_DENIED");
1844 pam_set_data(pamh
, PAM_WINBIND_PWD_LAST_SET
, (void *)pwdlastset_prelim
, NULL
);
1846 ret
= pam_set_item(pamh
, PAM_OLDAUTHTOK
, (const void *) pass_old
);
1848 if (ret
!= PAM_SUCCESS
) {
1849 _pam_log(pamh
, ctrl
, LOG_CRIT
, "failed to set PAM_OLDAUTHTOK");
1851 } else if (flags
& PAM_UPDATE_AUTHTOK
) {
1853 time_t pwdlastset_update
= 0;
1856 * obtain the proposed password
1860 * get the old token back.
1863 ret
= _pam_get_item(pamh
, PAM_OLDAUTHTOK
, &pass_old
);
1865 if (ret
!= PAM_SUCCESS
) {
1866 _pam_log(pamh
, ctrl
, LOG_NOTICE
, "user not authenticated");
1870 lctrl
= ctrl
& ~WINBIND_TRY_FIRST_PASS_ARG
;
1872 if (on(WINBIND_USE_AUTHTOK_ARG
, lctrl
)) {
1873 lctrl
|= WINBIND_USE_FIRST_PASS_ARG
;
1876 ret
= PAM_AUTHTOK_ERR
;
1877 while ((ret
!= PAM_SUCCESS
) && (retry
++ < MAX_PASSWD_TRIES
)) {
1879 * use_authtok is to force the use of a previously entered
1880 * password -- needed for pluggable password strength checking
1883 ret
= _winbind_read_password(pamh
, lctrl
,
1885 "Enter new NT password: ",
1886 "Retype new NT password: ",
1887 (const char **) &pass_new
);
1889 if (ret
!= PAM_SUCCESS
) {
1890 _pam_log_debug(pamh
, ctrl
, LOG_ALERT
1891 ,"password - new password not obtained");
1892 pass_old
= NULL
;/* tidy up */
1897 * At this point we know who the user is and what they
1898 * propose as their new password. Verify that the new
1899 * password is acceptable.
1902 if (pass_new
[0] == '\0') {/* "\0" password = NULL */
1908 * By reaching here we have approved the passwords and must now
1909 * rebuild the password database file.
1911 _pam_get_data( pamh
, PAM_WINBIND_PWD_LAST_SET
,
1912 &pwdlastset_update
);
1914 ret
= winbind_chauthtok_request(pamh
, ctrl
, user
, pass_old
, pass_new
, pwdlastset_update
);
1916 _pam_overwrite(pass_new
);
1917 _pam_overwrite(pass_old
);
1918 pass_old
= pass_new
= NULL
;
1922 /* just in case we need krb5 creds after a password change over msrpc */
1924 if (ctrl
& WINBIND_KRB5_AUTH
) {
1925 struct winbindd_response response
;
1927 const char *member
= get_member_from_config(pamh
, argc
, argv
, ctrl
, d
);
1928 const char *cctype
= get_krb5_cc_type_from_config(pamh
, argc
, argv
, ctrl
, d
);
1930 ret
= winbind_auth_request(pamh
, ctrl
, user
, pass_new
,
1931 member
, cctype
, &response
, NULL
, NULL
);
1932 _pam_overwrite(pass_new
);
1933 _pam_overwrite(pass_old
);
1934 pass_old
= pass_new
= NULL
;
1936 iniparser_freedict(d
);
1938 /* Deal with offline errors. */
1939 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
,
1941 "NT_STATUS_NO_LOGON_SERVERS");
1942 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
,
1944 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
1945 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh
,
1947 "NT_STATUS_ACCESS_DENIED");
1951 ret
= PAM_SERVICE_ERR
;
1956 iniparser_freedict(d
);
1959 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", pamh
, ctrl
, ret
);
1966 /* static module data */
1968 struct pam_module _pam_winbind_modstruct
= {
1970 pam_sm_authenticate
,
1973 pam_sm_open_session
,
1974 pam_sm_close_session
,
1981 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
1982 * Copyright (c) Tim Potter <tpot@samba.org> 2000
1983 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
1984 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2007
1985 * Copyright (c) Jan Rêkorajski 1999.
1986 * Copyright (c) Andrew G. Morgan 1996-8.
1987 * Copyright (c) Alex O. Yuriev, 1996.
1988 * Copyright (c) Cristian Gafton 1996.
1989 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
1991 * Redistribution and use in source and binary forms, with or without
1992 * modification, are permitted provided that the following conditions
1994 * 1. Redistributions of source code must retain the above copyright
1995 * notice, and the entire permission notice in its entirety,
1996 * including the disclaimer of warranties.
1997 * 2. Redistributions in binary form must reproduce the above copyright
1998 * notice, this list of conditions and the following disclaimer in the
1999 * documentation and/or other materials provided with the distribution.
2000 * 3. The name of the author may not be used to endorse or promote
2001 * products derived from this software without specific prior
2002 * written permission.
2004 * ALTERNATIVELY, this product may be distributed under the terms of
2005 * the GNU Public License, in which case the provisions of the GPL are
2006 * required INSTEAD OF the above restrictions. (This clause is
2007 * necessary due to a potential bad interaction between the GPL and
2008 * the restrictions contained in a BSD-style copyright.)
2010 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
2011 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
2012 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
2013 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
2014 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
2015 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
2016 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2017 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
2018 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
2019 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
2020 * OF THE POSSIBILITY OF SUCH DAMAGE.