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: %p] ENTER: " function " (flags: 0x%04x)", 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: %p] LEAVE: " function " returning %d", 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, ...) PRINTF_ATTRIBUTE(4,5);
82 static void _pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
86 if (_pam_log_is_silent(ctrl)) {
90 va_start(args, format);
91 _pam_log_int(pamh, err, format, args);
95 static BOOL _pam_log_is_debug_enabled(int ctrl)
101 if (_pam_log_is_silent(ctrl)) {
105 if (!(ctrl & WINBIND_DEBUG_ARG)) {
112 static BOOL _pam_log_is_debug_state_enabled(int ctrl)
114 if (!(ctrl & WINBIND_DEBUG_STATE)) {
118 return _pam_log_is_debug_enabled(ctrl);
121 static void _pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
122 static void _pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
126 if (!_pam_log_is_debug_enabled(ctrl)) {
130 va_start(args, format);
131 _pam_log_int(pamh, err, format, args);
135 static void _pam_log_state_datum(const pam_handle_t *pamh, int ctrl, int item_type, const char *key, int is_string)
137 const void *data = NULL;
138 if (item_type != 0) {
139 pam_get_item(pamh, item_type, &data);
141 pam_get_data(pamh, key, &data);
144 const char *type = (item_type != 0) ? "ITEM" : "DATA";
145 if (is_string != 0) {
146 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: %p] STATE: %s(%s) = \"%s\" (%p)", pamh, type, key, (const char *) data, data);
148 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: %p] STATE: %s(%s) = %p", pamh, type, key, data);
153 #define _PAM_LOG_STATE_DATA_POINTER(pamh, ctrl, module_data_name) \
154 _pam_log_state_datum(pamh, ctrl, 0, module_data_name, 0)
156 #define _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, module_data_name) \
157 _pam_log_state_datum(pamh, ctrl, 0, module_data_name, 1)
159 #define _PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, item_type) \
160 _pam_log_state_datum(pamh, ctrl, item_type, #item_type, 0)
162 #define _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, item_type) \
163 _pam_log_state_datum(pamh, ctrl, item_type, #item_type, 1)
165 #ifdef DEBUG_PASSWORD
166 #define _LOG_PASSWORD_AS_STRING 1
168 #define _LOG_PASSWORD_AS_STRING 0
171 #define _PAM_LOG_STATE_ITEM_PASSWORD(pamh, ctrl, item_type) \
172 _pam_log_state_datum(pamh, ctrl, item_type, #item_type, _LOG_PASSWORD_AS_STRING)
174 static void _pam_log_state(const pam_handle_t *pamh, int ctrl)
176 if (!_pam_log_is_debug_state_enabled(ctrl)) {
180 _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_SERVICE);
181 _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_USER);
182 _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_TTY);
183 _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_RHOST);
184 _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_RUSER);
185 _PAM_LOG_STATE_ITEM_PASSWORD(pamh, ctrl, PAM_OLDAUTHTOK);
186 _PAM_LOG_STATE_ITEM_PASSWORD(pamh, ctrl, PAM_AUTHTOK);
187 _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_USER_PROMPT);
188 _PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, PAM_CONV);
189 #ifdef PAM_FAIL_DELAY
190 _PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, PAM_FAIL_DELAY);
192 #ifdef PAM_REPOSITORY
193 _PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, PAM_REPOSITORY);
196 _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_HOMEDIR);
197 _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_LOGONSCRIPT);
198 _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_LOGONSERVER);
199 _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_PROFILEPATH);
200 _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_NEW_AUTHTOK_REQD); /* Use atoi to get PAM result code */
201 _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
202 _PAM_LOG_STATE_DATA_POINTER(pamh, ctrl, PAM_WINBIND_PWD_LAST_SET);
205 static int _pam_parse(const pam_handle_t *pamh, int flags, int argc, const char **argv, dictionary **result_d)
208 const char *config_file = NULL;
211 dictionary *d = NULL;
213 if (flags & PAM_SILENT) {
214 ctrl |= WINBIND_SILENT;
217 for (i=argc,v=argv; i-- > 0; ++v) {
218 if (!strncasecmp(*v, "config", strlen("config"))) {
219 ctrl |= WINBIND_CONFIG_FILE;
225 if (config_file == NULL) {
226 config_file = PAM_WINBIND_CONFIG_FILE;
229 d = iniparser_load(config_file);
231 goto config_from_pam;
234 if (iniparser_getboolean(d, "global:debug", False)) {
235 ctrl |= WINBIND_DEBUG_ARG;
238 if (iniparser_getboolean(d, "global:debug_state", False)) {
239 ctrl |= WINBIND_DEBUG_STATE;
242 if (iniparser_getboolean(d, "global:cached_login", False)) {
243 ctrl |= WINBIND_CACHED_LOGIN;
246 if (iniparser_getboolean(d, "global:krb5_auth", False)) {
247 ctrl |= WINBIND_KRB5_AUTH;
250 if (iniparser_getboolean(d, "global:silent", False)) {
251 ctrl |= WINBIND_SILENT;
254 if (iniparser_getstr(d, "global:krb5_ccache_type") != NULL) {
255 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
258 if ((iniparser_getstr(d, "global:require-membership-of") != NULL) ||
259 (iniparser_getstr(d, "global:require_membership_of") != NULL)) {
260 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
263 if (iniparser_getboolean(d, "global:try_first_pass", False)) {
264 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
267 if (iniparser_getint(d, "global:warn_pwd_expire", 0)) {
268 ctrl |= WINBIND_WARN_PWD_EXPIRE;
272 /* step through arguments */
273 for (i=argc,v=argv; i-- > 0; ++v) {
275 /* generic options */
276 if (!strcmp(*v,"debug"))
277 ctrl |= WINBIND_DEBUG_ARG;
278 else if (!strcasecmp(*v, "debug_state"))
279 ctrl |= WINBIND_DEBUG_STATE;
280 else if (!strcasecmp(*v, "silent"))
281 ctrl |= WINBIND_SILENT;
282 else if (!strcasecmp(*v, "use_authtok"))
283 ctrl |= WINBIND_USE_AUTHTOK_ARG;
284 else if (!strcasecmp(*v, "use_first_pass"))
285 ctrl |= WINBIND_USE_FIRST_PASS_ARG;
286 else if (!strcasecmp(*v, "try_first_pass"))
287 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
288 else if (!strcasecmp(*v, "unknown_ok"))
289 ctrl |= WINBIND_UNKNOWN_OK_ARG;
290 else if (!strncasecmp(*v, "require_membership_of", strlen("require_membership_of")))
291 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
292 else if (!strncasecmp(*v, "require-membership-of", strlen("require-membership-of")))
293 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
294 else if (!strcasecmp(*v, "krb5_auth"))
295 ctrl |= WINBIND_KRB5_AUTH;
296 else if (!strncasecmp(*v, "krb5_ccache_type", strlen("krb5_ccache_type")))
297 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
298 else if (!strcasecmp(*v, "cached_login"))
299 ctrl |= WINBIND_CACHED_LOGIN;
301 _pam_log(pamh, ctrl, LOG_ERR, "pam_parse: unknown option: %s", *v);
311 iniparser_freedict(d);
318 static void _pam_winbind_cleanup_func(pam_handle_t *pamh, void *data, int error_status)
320 int ctrl = _pam_parse(pamh, 0, 0, NULL, NULL);
321 if (_pam_log_is_debug_state_enabled(ctrl)) {
322 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: %p] CLEAN: cleaning up PAM data %p (error_status = %d)", pamh, data, error_status);
328 static const struct ntstatus_errors {
329 const char *ntstatus_string;
330 const char *error_string;
331 } ntstatus_errors[] = {
332 {"NT_STATUS_OK", "Success"},
333 {"NT_STATUS_BACKUP_CONTROLLER", "No primary Domain Controler available"},
334 {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND", "No domain controllers found"},
335 {"NT_STATUS_NO_LOGON_SERVERS", "No logon servers"},
336 {"NT_STATUS_PWD_TOO_SHORT", "Password too short"},
337 {"NT_STATUS_PWD_TOO_RECENT", "The password of this user is too recent to change"},
338 {"NT_STATUS_PWD_HISTORY_CONFLICT", "Password is already in password history"},
339 {"NT_STATUS_PASSWORD_EXPIRED", "Your password has expired"},
340 {"NT_STATUS_PASSWORD_MUST_CHANGE", "You need to change your password now"},
341 {"NT_STATUS_INVALID_WORKSTATION", "You are not allowed to logon from this workstation"},
342 {"NT_STATUS_INVALID_LOGON_HOURS", "You are not allowed to logon at this time"},
343 {"NT_STATUS_ACCOUNT_EXPIRED", "Your account has expired. Please contact your System administrator"}, /* SCNR */
344 {"NT_STATUS_ACCOUNT_DISABLED", "Your account is disabled. Please contact your System administrator"}, /* SCNR */
345 {"NT_STATUS_ACCOUNT_LOCKED_OUT", "Your account has been locked. Please contact your System administrator"}, /* SCNR */
346 {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT", "Invalid Trust Account"},
347 {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT", "Invalid Trust Account"},
348 {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT", "Invalid Trust Account"},
349 {"NT_STATUS_ACCESS_DENIED", "Access is denied"},
353 const char *_get_ntstatus_error_string(const char *nt_status_string)
356 for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
357 if (!strcasecmp(ntstatus_errors[i].ntstatus_string, nt_status_string)) {
358 return ntstatus_errors[i].error_string;
364 /* --- authentication management functions --- */
366 /* Attempt a conversation */
368 static int converse(pam_handle_t *pamh, int nargs,
369 struct pam_message **message,
370 struct pam_response **response)
373 struct pam_conv *conv;
375 retval = _pam_get_item(pamh, PAM_CONV, &conv );
376 if (retval == PAM_SUCCESS) {
377 retval = conv->conv(nargs, (const struct pam_message **)message,
378 response, conv->appdata_ptr);
381 return retval; /* propagate error status */
385 static int _make_remark(pam_handle_t * pamh, int flags, int type, const char *text)
387 int retval = PAM_SUCCESS;
389 struct pam_message *pmsg[1], msg[1];
390 struct pam_response *resp;
392 if (flags & WINBIND_SILENT) {
397 msg[0].msg = CONST_DISCARD(char *, text);
398 msg[0].msg_style = type;
401 retval = converse(pamh, 1, pmsg, &resp);
404 _pam_drop_reply(resp, 1);
409 static int _make_remark_v(pam_handle_t * pamh, int flags, int type, const char *format, va_list args)
414 ret = vasprintf(&var, format, args);
416 _pam_log(pamh, 0, LOG_ERR, "memory allocation failure");
420 ret = _make_remark(pamh, flags, type, var);
425 static int _make_remark_format(pam_handle_t * pamh, int flags, int type, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
426 static int _make_remark_format(pam_handle_t * pamh, int flags, int type, const char *format, ...)
431 va_start(args, format);
432 ret = _make_remark_v(pamh, flags, type, format, args);
437 static int pam_winbind_request(pam_handle_t * pamh, int ctrl,
438 enum winbindd_cmd req_type,
439 struct winbindd_request *request,
440 struct winbindd_response *response)
442 /* Fill in request and send down pipe */
443 init_request(request, req_type);
445 if (write_sock(request, sizeof(*request), 0, 0) == -1) {
446 _pam_log(pamh, ctrl, LOG_ERR, "pam_winbind_request: write to socket failed!");
448 return PAM_SERVICE_ERR;
452 if (read_reply(response) == -1) {
453 _pam_log(pamh, ctrl, LOG_ERR, "pam_winbind_request: read from socket failed!");
455 return PAM_SERVICE_ERR;
458 /* We are done with the socket - close it and avoid mischeif */
461 /* Copy reply data from socket */
462 if (response->result == WINBINDD_OK) {
466 /* no need to check for pam_error codes for getpwnam() */
469 case WINBINDD_GETPWNAM:
470 case WINBINDD_LOOKUPNAME:
471 if (strlen(response->data.auth.nt_status_string) > 0) {
472 _pam_log(pamh, ctrl, LOG_ERR, "request failed, NT error was %s",
473 response->data.auth.nt_status_string);
475 _pam_log(pamh, ctrl, LOG_ERR, "request failed");
477 return PAM_USER_UNKNOWN;
482 if (response->data.auth.pam_error != PAM_SUCCESS) {
483 _pam_log(pamh, ctrl, LOG_ERR, "request failed: %s, PAM error was %s (%d), NT error was %s",
484 response->data.auth.error_string,
485 pam_strerror(pamh, response->data.auth.pam_error),
486 response->data.auth.pam_error,
487 response->data.auth.nt_status_string);
488 return response->data.auth.pam_error;
491 _pam_log(pamh, ctrl, LOG_ERR, "request failed, but PAM error 0!");
493 return PAM_SERVICE_ERR;
496 static int pam_winbind_request_log(pam_handle_t * pamh,
498 enum winbindd_cmd req_type,
499 struct winbindd_request *request,
500 struct winbindd_response *response,
505 retval = pam_winbind_request(pamh, ctrl, req_type, request, response);
509 /* incorrect password */
510 _pam_log(pamh, ctrl, LOG_WARNING, "user '%s' denied access (incorrect password or invalid membership)", user);
512 case PAM_ACCT_EXPIRED:
513 /* account expired */
514 _pam_log(pamh, ctrl, LOG_WARNING, "user '%s' account expired", user);
516 case PAM_AUTHTOK_EXPIRED:
517 /* password expired */
518 _pam_log(pamh, ctrl, LOG_WARNING, "user '%s' password expired", user);
520 case PAM_NEW_AUTHTOK_REQD:
521 /* new password required */
522 _pam_log(pamh, ctrl, LOG_WARNING, "user '%s' new password required", user);
524 case PAM_USER_UNKNOWN:
525 /* the user does not exist */
526 _pam_log_debug(pamh, ctrl, LOG_NOTICE, "user '%s' not found", user);
527 if (ctrl & WINBIND_UNKNOWN_OK_ARG) {
532 /* Otherwise, the authentication looked good */
536 case WINBINDD_PAM_AUTH:
537 _pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' granted access", user);
539 case WINBINDD_PAM_CHAUTHTOK:
540 _pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' password changed", user);
543 _pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' OK", user);
549 /* we don't know anything about this return value */
550 _pam_log(pamh, ctrl, LOG_ERR, "internal module error (retval = %d, user = '%s')",
557 * send a password expiry message if required
559 * @param pamh PAM handle
560 * @param ctrl PAM winbind options.
561 * @param next_change expected (calculated) next expiry date.
562 * @param already_expired pointer to a boolean to indicate if the password is
565 * @return boolean Returns True if message has been sent, False if not.
568 static BOOL _pam_send_password_expiry_message(pam_handle_t *pamh,
573 BOOL *already_expired)
576 struct tm tm_now, tm_next_change;
578 if (already_expired) {
579 *already_expired = False;
582 if (next_change <= now) {
583 PAM_WB_REMARK_DIRECT(pamh, ctrl, "NT_STATUS_PASSWORD_EXPIRED");
584 if (already_expired) {
585 *already_expired = True;
590 if ((next_change < 0) ||
591 (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
595 if ((localtime_r(&now, &tm_now) == NULL) ||
596 (localtime_r(&next_change, &tm_next_change) == NULL)) {
600 days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) - (tm_now.tm_yday+tm_now.tm_year*365);
603 _make_remark(pamh, ctrl, PAM_TEXT_INFO, "Your password expires today");
607 if (days > 0 && days < warn_pwd_expire) {
608 _make_remark_format(pamh, ctrl, PAM_TEXT_INFO, "Your password will expire in %d %s",
609 days, (days > 1) ? "days":"day");
617 * Send a warning if the password expires in the near future
619 * @param pamh PAM handle
620 * @param ctrl PAM winbind options.
621 * @param response The full authentication response structure.
622 * @param already_expired boolean, is the pwd already expired?
627 static void _pam_warn_password_expiry(pam_handle_t *pamh,
629 const struct winbindd_response *response,
631 BOOL *already_expired)
633 time_t now = time(NULL);
634 time_t next_change = 0;
636 if (already_expired) {
637 *already_expired = False;
640 /* accounts with ACB_PWNOEXP set never receive a warning */
641 if (response->data.auth.info3.acct_flags & ACB_PWNOEXP) {
645 /* no point in sending a warning if this is a grace logon */
646 if (PAM_WB_GRACE_LOGON(response->data.auth.info3.user_flgs)) {
650 /* check if the info3 must change timestamp has been set */
651 next_change = response->data.auth.info3.pass_must_change_time;
653 if (_pam_send_password_expiry_message(pamh, flags, next_change, now,
659 /* now check for the global password policy */
660 /* good catch from Ralf Haferkamp: an expiry of "never" is translated
662 if (response->data.auth.policy.expire <= 0) {
666 next_change = response->data.auth.info3.pass_last_set_time +
667 response->data.auth.policy.expire;
669 if (_pam_send_password_expiry_message(pamh, flags, next_change, now,
675 /* no warning sent */
678 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
680 static BOOL safe_append_string(char *dest,
682 int dest_buffer_size)
684 * Append a string, making sure not to overflow and to always return a NULL-terminated
687 * @param dest Destination string buffer (must already be NULL-terminated).
688 * @param src Source string buffer.
689 * @param dest_buffer_size Size of dest buffer in bytes.
691 * @return False if dest buffer is not big enough (no bytes copied), True on success.
694 int dest_length = strlen(dest);
695 int src_length = strlen(src);
697 if ( dest_length + src_length + 1 > dest_buffer_size ) {
701 memcpy(dest + dest_length, src, src_length + 1);
705 static BOOL winbind_name_to_sid_string(pam_handle_t *pamh,
709 char *sid_list_buffer,
710 int sid_list_buffer_size)
712 * Convert a names into a SID string, appending it to a buffer.
714 * @param pamh PAM handle
715 * @param ctrl PAM winbind options.
716 * @param user User in PAM request.
717 * @param name Name to convert.
718 * @param sid_list_buffer Where to append the string sid.
719 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
721 * @return False on failure, True on success.
724 const char* sid_string;
725 struct winbindd_response sid_response;
728 if (IS_SID_STRING(name)) {
731 struct winbindd_request sid_request;
733 ZERO_STRUCT(sid_request);
734 ZERO_STRUCT(sid_response);
736 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "no sid given, looking up: %s\n", name);
738 /* fortunatly winbindd can handle non-separated names */
739 strncpy(sid_request.data.name.name, name,
740 sizeof(sid_request.data.name.name) - 1);
742 if (pam_winbind_request_log(pamh, ctrl, WINBINDD_LOOKUPNAME, &sid_request, &sid_response, user)) {
743 _pam_log(pamh, ctrl, LOG_INFO, "could not lookup name: %s\n", name);
747 sid_string = sid_response.data.sid.sid;
750 if (!safe_append_string(sid_list_buffer, sid_string, sid_list_buffer_size)) {
757 static BOOL winbind_name_list_to_sid_string_list(pam_handle_t *pamh,
760 const char *name_list,
761 char *sid_list_buffer,
762 int sid_list_buffer_size)
764 * Convert a list of names into a list of sids.
766 * @param pamh PAM handle
767 * @param ctrl PAM winbind options.
768 * @param user User in PAM request.
769 * @param name_list List of names or string sids, separated by commas.
770 * @param sid_list_buffer Where to put the list of string sids.
771 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
773 * @return False on failure, True on success.
777 char *current_name = NULL;
778 const char *search_location;
781 if ( sid_list_buffer_size > 0 ) {
782 sid_list_buffer[0] = 0;
785 search_location = name_list;
786 while ( (comma = strstr(search_location, ",")) != NULL ) {
787 current_name = strndup(search_location, comma - search_location);
788 if (NULL == current_name) {
792 if (!winbind_name_to_sid_string(pamh, ctrl, user, current_name, sid_list_buffer, sid_list_buffer_size)) {
796 SAFE_FREE(current_name);
798 if (!safe_append_string(sid_list_buffer, ",", sid_list_buffer_size)) {
802 search_location = comma + 1;
805 if (!winbind_name_to_sid_string(pamh, ctrl, user, search_location, sid_list_buffer, sid_list_buffer_size)) {
812 SAFE_FREE(current_name);
817 * put krb5ccname variable into environment
819 * @param pamh PAM handle
820 * @param ctrl PAM winbind options.
821 * @param krb5ccname env variable retrieved from winbindd.
826 static void _pam_setup_krb5_env(pam_handle_t *pamh, int ctrl, const char *krb5ccname)
831 if (off(ctrl, WINBIND_KRB5_AUTH)) {
835 if (!krb5ccname || (strlen(krb5ccname) == 0)) {
839 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "request returned KRB5CCNAME: %s", krb5ccname);
841 if (snprintf(var, sizeof(var), "KRB5CCNAME=%s", krb5ccname) == -1) {
845 ret = pam_putenv(pamh, var);
847 _pam_log(pamh, ctrl, LOG_ERR, "failed to set KRB5CCNAME to %s: %s",
848 var, pam_strerror(pamh, ret));
853 * Set string into the PAM stack.
855 * @param pamh PAM handle
856 * @param ctrl PAM winbind options.
857 * @param data_name Key name for pam_set_data.
858 * @param value String value.
863 static void _pam_set_data_string(pam_handle_t *pamh, int ctrl, const char *data_name, const char *value)
867 if ( !data_name || !value || (strlen(data_name) == 0) || (strlen(value) == 0) ) {
871 ret = pam_set_data(pamh, data_name, (void *)strdup(value), _pam_winbind_cleanup_func);
873 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "Could not set data %s: %s\n",
874 data_name, pam_strerror(pamh, ret));
880 * Set info3 strings into the PAM stack.
882 * @param pamh PAM handle
883 * @param ctrl PAM winbind options.
884 * @param data_name Key name for pam_set_data.
885 * @param value String value.
890 static void _pam_set_data_info3(pam_handle_t *pamh, int ctrl, struct winbindd_response *response)
892 _pam_set_data_string(pamh, ctrl, PAM_WINBIND_HOMEDIR, response->data.auth.info3.home_dir);
893 _pam_set_data_string(pamh, ctrl, PAM_WINBIND_LOGONSCRIPT, response->data.auth.info3.logon_script);
894 _pam_set_data_string(pamh, ctrl, PAM_WINBIND_LOGONSERVER, response->data.auth.info3.logon_srv);
895 _pam_set_data_string(pamh, ctrl, PAM_WINBIND_PROFILEPATH, response->data.auth.info3.profile_path);
899 * Free info3 strings in the PAM stack.
901 * @param pamh PAM handle
906 static void _pam_free_data_info3(pam_handle_t *pamh)
908 pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
909 pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
910 pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
911 pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
915 * Send PAM_ERROR_MSG for cached or grace logons.
917 * @param pamh PAM handle
918 * @param ctrl PAM winbind options.
919 * @param username User in PAM request.
920 * @param info3_user_flgs Info3 flags containing logon type bits.
925 static void _pam_warn_logon_type(pam_handle_t *pamh, int ctrl, const char *username, uint32 info3_user_flgs)
927 /* inform about logon type */
928 if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
930 _make_remark(pamh, ctrl, PAM_ERROR_MSG,
931 "Grace login. Please change your password as soon you're online again");
932 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
933 "User %s logged on using grace logon\n", username);
935 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
937 _make_remark(pamh, ctrl, PAM_ERROR_MSG,
938 "Domain Controller unreachable, using cached credentials instead. Network resources may be unavailable");
939 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
940 "User %s logged on using cached credentials\n", username);
945 * Send PAM_ERROR_MSG for krb5 errors.
947 * @param pamh PAM handle
948 * @param ctrl PAM winbind options.
949 * @param username User in PAM request.
950 * @param info3_user_flgs Info3 flags containing logon type bits.
955 static void _pam_warn_krb5_failure(pam_handle_t *pamh, int ctrl, const char *username, uint32 info3_user_flgs)
957 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
958 _make_remark(pamh, ctrl, PAM_ERROR_MSG,
959 "Failed to establish your Kerberos Ticket cache "
960 "due time differences\n"
961 "with the domain controller. "
962 "Please verify the system time.\n");
963 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
964 "User %s: Clock skew when getting Krb5 TGT\n", username);
969 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
971 * @param response The struct winbindd_response.
973 * @return string (caller needs to free).
976 static char *_pam_compose_pwd_restriction_string(struct winbindd_response *response)
979 size_t offset = 0, ret = 0, str_size = 1024;
981 str = (char *)malloc(str_size);
986 memset(str, '\0', str_size);
988 offset = snprintf(str, str_size, "Your password ");
993 if (response->data.auth.policy.min_length_password > 0) {
994 ret = snprintf(str+offset, str_size-offset,
995 "must be at least %d characters; ",
996 response->data.auth.policy.min_length_password);
1003 if (response->data.auth.policy.password_history > 0) {
1004 ret = snprintf(str+offset, str_size-offset,
1005 "cannot repeat any of your previous %d passwords; ",
1006 response->data.auth.policy.password_history);
1013 if (response->data.auth.policy.password_properties & DOMAIN_PASSWORD_COMPLEX) {
1014 ret = snprintf(str+offset, str_size-offset,
1015 "must contain capitals, numerals or punctuation; "
1016 "and cannot contain your account or full name; ");
1023 ret = snprintf(str+offset, str_size-offset,
1024 "Please type a different password. "
1025 "Type a password which meets these requirements in both text boxes.");
1037 /* talk to winbindd */
1038 static int winbind_auth_request(pam_handle_t * pamh,
1044 const int warn_pwd_expire,
1045 struct winbindd_response *p_response,
1046 time_t *pwd_last_set,
1049 struct winbindd_request request;
1050 struct winbindd_response response;
1052 BOOL already_expired = False;
1054 ZERO_STRUCT(request);
1055 ZERO_STRUCT(response);
1061 strncpy(request.data.auth.user, user,
1062 sizeof(request.data.auth.user)-1);
1064 strncpy(request.data.auth.pass, pass,
1065 sizeof(request.data.auth.pass)-1);
1067 request.data.auth.krb5_cc_type[0] = '\0';
1068 request.data.auth.uid = -1;
1070 request.flags = WBFLAG_PAM_INFO3_TEXT | WBFLAG_PAM_CONTACT_TRUSTDOM;
1072 if (ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1073 struct passwd *pwd = NULL;
1075 pwd = getpwnam(user);
1077 return PAM_USER_UNKNOWN;
1079 request.data.auth.uid = pwd->pw_uid;
1082 if (ctrl & WINBIND_KRB5_AUTH) {
1084 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "enabling krb5 login flag\n");
1086 request.flags |= WBFLAG_PAM_KRB5 | WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1089 if (ctrl & WINBIND_CACHED_LOGIN) {
1090 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "enabling cached login flag\n");
1091 request.flags |= WBFLAG_PAM_CACHED_LOGIN;
1096 request.flags |= WBFLAG_PAM_UNIX_NAME;
1099 if (cctype != NULL) {
1100 strncpy(request.data.auth.krb5_cc_type, cctype,
1101 sizeof(request.data.auth.krb5_cc_type) - 1);
1102 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "enabling request for a %s krb5 ccache\n", cctype);
1105 request.data.auth.require_membership_of_sid[0] = '\0';
1107 if (member != NULL) {
1109 if (!winbind_name_list_to_sid_string_list(pamh, ctrl, user, member,
1110 request.data.auth.require_membership_of_sid,
1111 sizeof(request.data.auth.require_membership_of_sid))) {
1113 _pam_log_debug(pamh, ctrl, LOG_ERR, "failed to serialize membership of sid \"%s\"\n", member);
1114 return PAM_AUTH_ERR;
1118 ret = pam_winbind_request_log(pamh, ctrl, WINBINDD_PAM_AUTH, &request, &response, user);
1121 *pwd_last_set = response.data.auth.info3.pass_last_set_time;
1125 /* We want to process the response in the caller. */
1126 *p_response = response;
1131 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_PASSWORD_EXPIRED");
1132 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_PASSWORD_MUST_CHANGE");
1133 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_INVALID_WORKSTATION");
1134 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_INVALID_LOGON_HOURS");
1135 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_ACCOUNT_EXPIRED");
1136 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_ACCOUNT_DISABLED");
1137 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_ACCOUNT_LOCKED_OUT");
1138 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT");
1139 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT");
1140 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT");
1141 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
1142 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_NO_LOGON_SERVERS");
1143 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_WRONG_PASSWORD");
1144 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_ACCESS_DENIED");
1147 if (ret == PAM_SUCCESS) {
1149 /* warn a user if the password is about to expire soon */
1150 _pam_warn_password_expiry(pamh, ctrl, &response,
1154 if (already_expired == True) {
1155 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "Password has expired "
1156 "(Password was last set: %lld, the policy says "
1157 "it should expire here %lld (now it's: %lu))\n",
1158 response.data.auth.info3.pass_last_set_time,
1159 response.data.auth.info3.pass_last_set_time +
1160 response.data.auth.policy.expire,
1163 return PAM_AUTHTOK_EXPIRED;
1166 /* inform about logon type */
1167 _pam_warn_logon_type(pamh, ctrl, user, response.data.auth.info3.user_flgs);
1169 /* inform about krb5 failures */
1170 _pam_warn_krb5_failure(pamh, ctrl, user, response.data.auth.info3.user_flgs);
1172 /* set some info3 info for other modules in the stack */
1173 _pam_set_data_info3(pamh, ctrl, &response);
1175 /* put krb5ccname into env */
1176 _pam_setup_krb5_env(pamh, ctrl, response.data.auth.krb5ccname);
1178 /* If winbindd returned a username, return the pointer to it here. */
1179 if (user_ret && response.extra_data.data) {
1180 /* We have to trust it's a null terminated string. */
1181 *user_ret = (char *)response.extra_data.data;
1188 /* talk to winbindd */
1189 static int winbind_chauthtok_request(pam_handle_t * pamh,
1192 const char *oldpass,
1193 const char *newpass,
1194 time_t pwd_last_set)
1196 struct winbindd_request request;
1197 struct winbindd_response response;
1200 ZERO_STRUCT(request);
1201 ZERO_STRUCT(response);
1203 if (request.data.chauthtok.user == NULL) return -2;
1205 strncpy(request.data.chauthtok.user, user,
1206 sizeof(request.data.chauthtok.user) - 1);
1208 if (oldpass != NULL) {
1209 strncpy(request.data.chauthtok.oldpass, oldpass,
1210 sizeof(request.data.chauthtok.oldpass) - 1);
1212 request.data.chauthtok.oldpass[0] = '\0';
1215 if (newpass != NULL) {
1216 strncpy(request.data.chauthtok.newpass, newpass,
1217 sizeof(request.data.chauthtok.newpass) - 1);
1219 request.data.chauthtok.newpass[0] = '\0';
1222 if (ctrl & WINBIND_KRB5_AUTH) {
1223 request.flags = WBFLAG_PAM_KRB5 | WBFLAG_PAM_CONTACT_TRUSTDOM;
1226 ret = pam_winbind_request_log(pamh, ctrl, WINBINDD_PAM_CHAUTHTOK, &request, &response, user);
1228 if (ret == PAM_SUCCESS) {
1232 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_BACKUP_CONTROLLER");
1233 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
1234 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_NO_LOGON_SERVERS");
1235 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_ACCESS_DENIED");
1237 /* TODO: tell the min pwd length ? */
1238 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_PWD_TOO_SHORT");
1240 /* TODO: tell the minage ? */
1241 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_PWD_TOO_RECENT");
1243 /* TODO: tell the history length ? */
1244 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_PWD_HISTORY_CONFLICT");
1246 if (!strcasecmp(response.data.auth.nt_status_string, "NT_STATUS_PASSWORD_RESTRICTION")) {
1248 char *pwd_restriction_string = NULL;
1250 /* FIXME: avoid to send multiple PAM messages after another */
1251 switch (response.data.auth.reject_reason) {
1254 case REJECT_REASON_OTHER:
1255 if ((response.data.auth.policy.min_passwordage > 0) &&
1256 (pwd_last_set + response.data.auth.policy.min_passwordage > time(NULL))) {
1257 PAM_WB_REMARK_DIRECT(pamh, ctrl, "NT_STATUS_PWD_TOO_RECENT");
1260 case REJECT_REASON_TOO_SHORT:
1261 PAM_WB_REMARK_DIRECT(pamh, ctrl, "NT_STATUS_PWD_TOO_SHORT");
1263 case REJECT_REASON_IN_HISTORY:
1264 PAM_WB_REMARK_DIRECT(pamh, ctrl, "NT_STATUS_PWD_HISTORY_CONFLICT");
1266 case REJECT_REASON_NOT_COMPLEX:
1267 _make_remark(pamh, ctrl, PAM_ERROR_MSG, "Password does not meet complexity requirements");
1270 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
1271 "unknown password change reject reason: %d",
1272 response.data.auth.reject_reason);
1276 pwd_restriction_string = _pam_compose_pwd_restriction_string(&response);
1277 if (pwd_restriction_string) {
1278 _make_remark(pamh, ctrl, PAM_ERROR_MSG, pwd_restriction_string);
1279 SAFE_FREE(pwd_restriction_string);
1287 * Checks if a user has an account
1290 * 1 = User not found
1294 static int valid_user(pam_handle_t *pamh, int ctrl, const char *user)
1296 /* check not only if the user is available over NSS calls, also make
1297 * sure it's really a winbind user, this is important when stacking PAM
1298 * modules in the 'account' or 'password' facility. */
1300 struct passwd *pwd = NULL;
1301 struct winbindd_request request;
1302 struct winbindd_response response;
1305 ZERO_STRUCT(request);
1306 ZERO_STRUCT(response);
1308 pwd = getpwnam(user);
1313 strncpy(request.data.username, user,
1314 sizeof(request.data.username) - 1);
1316 ret = pam_winbind_request_log(pamh, ctrl, WINBINDD_GETPWNAM, &request, &response, user);
1319 case PAM_USER_UNKNOWN:
1329 static char *_pam_delete(register char *xx)
1337 * obtain a password from the user
1340 static int _winbind_read_password(pam_handle_t * pamh,
1342 const char *comment,
1343 const char *prompt1,
1344 const char *prompt2,
1352 _pam_log(pamh, ctrl, LOG_DEBUG, "getting password (0x%08x)", ctrl);
1355 * make sure nothing inappropriate gets returned
1358 *pass = token = NULL;
1361 * which authentication token are we getting?
1364 authtok_flag = on(WINBIND__OLD_PASSWORD, ctrl) ? PAM_OLDAUTHTOK : PAM_AUTHTOK;
1367 * should we obtain the password from a PAM item ?
1370 if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) || on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
1371 retval = _pam_get_item(pamh, authtok_flag, &item);
1372 if (retval != PAM_SUCCESS) {
1374 _pam_log(pamh, ctrl, LOG_ALERT,
1375 "pam_get_item returned error to unix-read-password"
1378 } else if (item != NULL) { /* we have a password! */
1381 _pam_log(pamh, ctrl, LOG_DEBUG,
1382 "pam_get_item returned a password");
1384 } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
1385 return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
1386 } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
1387 && off(WINBIND__OLD_PASSWORD, ctrl)) {
1388 return PAM_AUTHTOK_RECOVER_ERR;
1392 * getting here implies we will have to get the password from the
1397 struct pam_message msg[3], *pmsg[3];
1398 struct pam_response *resp;
1401 /* prepare to converse */
1403 if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
1405 msg[0].msg_style = PAM_TEXT_INFO;
1406 msg[0].msg = CONST_DISCARD(char *, comment);
1413 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
1414 msg[i++].msg = CONST_DISCARD(char *, prompt1);
1417 if (prompt2 != NULL) {
1419 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
1420 msg[i++].msg = CONST_DISCARD(char *, prompt2);
1423 /* so call the conversation expecting i responses */
1425 retval = converse(pamh, i, pmsg, &resp);
1429 /* interpret the response */
1431 if (retval == PAM_SUCCESS) { /* a good conversation */
1433 token = x_strdup(resp[i - replies].resp);
1434 if (token != NULL) {
1436 /* verify that password entered correctly */
1437 if (!resp[i - 1].resp
1438 || strcmp(token, resp[i - 1].resp)) {
1439 _pam_delete(token); /* mistyped */
1440 retval = PAM_AUTHTOK_RECOVER_ERR;
1441 _make_remark(pamh, ctrl, PAM_ERROR_MSG, MISTYPED_PASS);
1445 _pam_log(pamh, ctrl, LOG_NOTICE, "could not recover authentication token");
1446 retval = PAM_AUTHTOK_RECOVER_ERR;
1451 * tidy up the conversation (resp_retcode) is ignored
1452 * -- what is it for anyway? AGM
1455 _pam_drop_reply(resp, i);
1458 retval = (retval == PAM_SUCCESS)
1459 ? PAM_AUTHTOK_RECOVER_ERR : retval;
1463 if (retval != PAM_SUCCESS) {
1464 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
1465 "unable to obtain a password");
1468 /* 'token' is the entered password */
1470 /* we store this password as an item */
1472 retval = pam_set_item(pamh, authtok_flag, token);
1473 _pam_delete(token); /* clean it up */
1474 if (retval != PAM_SUCCESS ||
1475 (retval = _pam_get_item(pamh, authtok_flag, &item)) != PAM_SUCCESS) {
1477 _pam_log(pamh, ctrl, LOG_CRIT, "error manipulating password");
1483 item = NULL; /* break link to password */
1488 const char *get_conf_item_string(const pam_handle_t *pamh,
1497 const char *parm_opt = NULL;
1499 if (!(ctrl & config_flag)) {
1503 /* let the pam opt take precedence over the pam_winbind.conf option */
1504 for ( i=0; i<argc; i++ ) {
1506 if ((strncmp(argv[i], item, strlen(item)) == 0)) {
1509 if ( (p = strchr( argv[i], '=' )) == NULL) {
1510 _pam_log(pamh, ctrl, LOG_INFO, "no \"=\" delimiter for \"%s\" found\n", item);
1513 _pam_log_debug(pamh, ctrl, LOG_INFO, "PAM config: %s '%s'\n", item, p+1);
1521 if (!asprintf(&key, "global:%s", item)) {
1525 parm_opt = iniparser_getstr(d, key);
1528 _pam_log_debug(pamh, ctrl, LOG_INFO, "CONFIG file: %s '%s'\n", item, parm_opt);
1534 int get_config_item_int(const pam_handle_t *pamh,
1542 int i, parm_opt = -1;
1544 if (!(ctrl & config_flag)) {
1548 /* let the pam opt take precedence over the pam_winbind.conf option */
1549 for (i = 0; i < argc; i++) {
1551 if ((strncmp(argv[i], item, strlen(item)) == 0)) {
1554 if ( (p = strchr( argv[i], '=' )) == NULL) {
1555 _pam_log(pamh, ctrl, LOG_INFO,
1556 "no \"=\" delimiter for \"%s\" found\n",
1560 parm_opt = atoi(p + 1);
1561 _pam_log_debug(pamh, ctrl, LOG_INFO,
1562 "PAM config: %s '%d'\n",
1571 if (!asprintf(&key, "global:%s", item)) {
1575 parm_opt = iniparser_getint(d, key, -1);
1578 _pam_log_debug(pamh, ctrl, LOG_INFO,
1579 "CONFIG file: %s '%d'\n",
1586 const char *get_krb5_cc_type_from_config(const pam_handle_t *pamh, int argc, const char **argv, int ctrl, dictionary *d)
1588 return get_conf_item_string(pamh, argc, argv, ctrl, d, "krb5_ccache_type", WINBIND_KRB5_CCACHE_TYPE);
1591 const char *get_member_from_config(const pam_handle_t *pamh, int argc, const char **argv, int ctrl, dictionary *d)
1593 const char *ret = NULL;
1594 ret = get_conf_item_string(pamh, argc, argv, ctrl, d, "require_membership_of", WINBIND_REQUIRED_MEMBERSHIP);
1598 return get_conf_item_string(pamh, argc, argv, ctrl, d, "require-membership-of", WINBIND_REQUIRED_MEMBERSHIP);
1601 int get_warn_pwd_expire_from_config(const pam_handle_t *pamh,
1608 ret = get_config_item_int(pamh, argc, argv, ctrl, d,
1609 "warn_pwd_expire", WINBIND_WARN_PWD_EXPIRE);
1610 /* no or broken setting */
1612 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
1618 * Retrieve the winbind separator.
1620 * @param pamh PAM handle
1621 * @param ctrl PAM winbind options.
1623 * @return string separator character. NULL on failure.
1626 static char winbind_get_separator(pam_handle_t *pamh, int ctrl)
1628 struct winbindd_request request;
1629 struct winbindd_response response;
1631 ZERO_STRUCT(request);
1632 ZERO_STRUCT(response);
1634 if (pam_winbind_request_log(pamh, ctrl, WINBINDD_INFO, &request, &response, NULL)) {
1638 return response.data.info.winbind_separator;
1642 * Convert a upn to a name.
1644 * @param pamh PAM handle
1645 * @param ctrl PAM winbind options.
1646 * @param upn USer UPN to be trabslated.
1648 * @return converted name. NULL pointer on failure. Caller needs to free.
1651 static char* winbind_upn_to_username(pam_handle_t *pamh, int ctrl, const char *upn)
1653 struct winbindd_request req;
1654 struct winbindd_response resp;
1657 int account_name_len;
1660 /* This cannot work when the winbind separator = @ */
1662 sep = winbind_get_separator(pamh, ctrl);
1663 if (!sep || sep == '@') {
1667 /* Convert the UPN to a SID */
1672 strncpy(req.data.name.dom_name, "",
1673 sizeof(req.data.name.dom_name) - 1);
1674 strncpy(req.data.name.name, upn,
1675 sizeof(req.data.name.name) - 1);
1676 retval = pam_winbind_request_log(pamh, ctrl, WINBINDD_LOOKUPNAME,
1678 if ( retval != PAM_SUCCESS ) {
1682 /* Convert the the SID back to the sAMAccountName */
1685 strncpy(req.data.sid, resp.data.sid.sid, sizeof(req.data.sid)-1);
1687 retval = pam_winbind_request_log(pamh, ctrl, WINBINDD_LOOKUPSID,
1689 if ( retval != PAM_SUCCESS ) {
1693 account_name_len = asprintf(&account_name, "%s\\%s",
1694 resp.data.name.dom_name,
1695 resp.data.name.name);
1697 return account_name;
1701 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
1702 int argc, const char **argv)
1704 const char *username;
1705 const char *password;
1706 const char *member = NULL;
1707 const char *cctype = NULL;
1708 int warn_pwd_expire;
1709 int retval = PAM_AUTH_ERR;
1710 dictionary *d = NULL;
1711 char *username_ret = NULL;
1712 char *new_authtok_required = NULL;
1713 char *real_username = NULL;
1715 /* parse arguments */
1716 int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
1718 retval = PAM_SYSTEM_ERR;
1722 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", pamh, ctrl, flags);
1724 /* Get the username */
1725 retval = pam_get_user(pamh, &username, NULL);
1726 if ((retval != PAM_SUCCESS) || (!username)) {
1727 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "can not get the username");
1728 retval = PAM_SERVICE_ERR;
1734 /* Decode the user name since AIX does not support logn user
1735 names by default. The name is encoded as _#uid. */
1737 if ( username[0] == '_' ) {
1738 uid_t id = atoi( &username[1] );
1739 struct passwd *pw = NULL;
1741 if ( (id!=0) && ((pw = getpwuid( id )) != NULL) ) {
1742 real_username = strdup( pw->pw_name );
1747 if ( !real_username ) {
1748 /* Just making a copy of the username we got from PAM */
1749 if ( (real_username = strdup( username )) == NULL ) {
1750 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
1751 "memory allocation failure when copying username");
1752 retval = PAM_SERVICE_ERR;
1757 /* Maybe this was a UPN */
1759 if (strchr(real_username, '@') != NULL) {
1760 char *samaccountname = NULL;
1762 samaccountname = winbind_upn_to_username(pamh, ctrl,
1764 if (samaccountname) {
1765 free(real_username);
1766 real_username = samaccountname;
1770 retval = _winbind_read_password(pamh, ctrl, NULL,
1774 if (retval != PAM_SUCCESS) {
1775 _pam_log(pamh, ctrl, LOG_ERR, "Could not retrieve user's password");
1776 retval = PAM_AUTHTOK_ERR;
1780 /* Let's not give too much away in the log file */
1782 #ifdef DEBUG_PASSWORD
1783 _pam_log_debug(pamh, ctrl, LOG_INFO, "Verify user '%s' with password '%s'",
1784 real_username, password);
1786 _pam_log_debug(pamh, ctrl, LOG_INFO, "Verify user '%s'", real_username);
1789 member = get_member_from_config(pamh, argc, argv, ctrl, d);
1791 cctype = get_krb5_cc_type_from_config(pamh, argc, argv, ctrl, d);
1793 warn_pwd_expire = get_warn_pwd_expire_from_config(pamh, argc, argv,
1796 /* Now use the username to look up password */
1797 retval = winbind_auth_request(pamh, ctrl, real_username, password, member,
1798 cctype, warn_pwd_expire, NULL, NULL,
1801 if (retval == PAM_NEW_AUTHTOK_REQD ||
1802 retval == PAM_AUTHTOK_EXPIRED) {
1804 char *new_authtok_required_during_auth = NULL;
1806 if (!asprintf(&new_authtok_required, "%d", retval)) {
1807 retval = PAM_BUF_ERR;
1811 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, new_authtok_required, _pam_winbind_cleanup_func);
1813 retval = PAM_SUCCESS;
1815 if (!asprintf(&new_authtok_required_during_auth, "%d", True)) {
1816 retval = PAM_BUF_ERR;
1820 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
1821 new_authtok_required_during_auth, _pam_winbind_cleanup_func);
1828 pam_set_item (pamh, PAM_USER, username_ret);
1829 _pam_log_debug(pamh, ctrl, LOG_INFO, "Returned user was '%s'", username_ret);
1833 if ( real_username ) {
1834 free( real_username );
1838 iniparser_freedict(d);
1841 if (!new_authtok_required) {
1842 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
1845 if (retval != PAM_SUCCESS) {
1846 _pam_free_data_info3(pamh);
1849 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", pamh, ctrl, retval);
1855 int pam_sm_setcred(pam_handle_t *pamh, int flags,
1856 int argc, const char **argv)
1858 int ret = PAM_SYSTEM_ERR;
1859 dictionary *d = NULL;
1861 /* parse arguments */
1862 int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
1864 ret = PAM_SYSTEM_ERR;
1868 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", pamh, ctrl, flags);
1870 switch (flags & ~PAM_SILENT) {
1872 case PAM_DELETE_CRED:
1873 ret = pam_sm_close_session(pamh, flags, argc, argv);
1875 case PAM_REFRESH_CRED:
1876 _pam_log_debug(pamh, ctrl, LOG_WARNING, "PAM_REFRESH_CRED not implemented");
1879 case PAM_REINITIALIZE_CRED:
1880 _pam_log_debug(pamh, ctrl, LOG_WARNING, "PAM_REINITIALIZE_CRED not implemented");
1883 case PAM_ESTABLISH_CRED:
1884 _pam_log_debug(pamh, ctrl, LOG_WARNING, "PAM_ESTABLISH_CRED not implemented");
1888 ret = PAM_SYSTEM_ERR;
1894 iniparser_freedict(d);
1897 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", pamh, ctrl, ret);
1903 * Account management. We want to verify that the account exists
1904 * before returning PAM_SUCCESS
1907 int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
1908 int argc, const char **argv)
1910 const char *username;
1911 int ret = PAM_USER_UNKNOWN;
1913 dictionary *d = NULL;
1915 /* parse arguments */
1916 int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
1918 return PAM_SYSTEM_ERR;
1921 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", pamh, ctrl, flags);
1924 /* Get the username */
1925 ret = pam_get_user(pamh, &username, NULL);
1926 if ((ret != PAM_SUCCESS) || (!username)) {
1927 _pam_log_debug(pamh, ctrl, LOG_DEBUG,"can not get the username");
1928 ret = PAM_SERVICE_ERR;
1932 /* Verify the username */
1933 ret = valid_user(pamh, ctrl, username);
1936 /* some sort of system error. The log was already printed */
1937 ret = PAM_SERVICE_ERR;
1940 /* the user does not exist */
1941 _pam_log_debug(pamh, ctrl, LOG_NOTICE, "user '%s' not found", username);
1942 if (ctrl & WINBIND_UNKNOWN_OK_ARG) {
1946 ret = PAM_USER_UNKNOWN;
1949 pam_get_data( pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, (const void **)&tmp);
1951 ret = atoi((const char *)tmp);
1953 case PAM_AUTHTOK_EXPIRED:
1954 /* fall through, since new token is required in this case */
1955 case PAM_NEW_AUTHTOK_REQD:
1956 _pam_log(pamh, ctrl, LOG_WARNING, "pam_sm_acct_mgmt success but %s is set",
1957 PAM_WINBIND_NEW_AUTHTOK_REQD);
1958 _pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' needs new password", username);
1959 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
1960 ret = PAM_NEW_AUTHTOK_REQD;
1963 _pam_log(pamh, ctrl, LOG_WARNING, "pam_sm_acct_mgmt success");
1964 _pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' granted access", username);
1970 /* Otherwise, the authentication looked good */
1971 _pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' granted access", username);
1975 /* we don't know anything about this return value */
1976 _pam_log(pamh, ctrl, LOG_ERR, "internal module error (ret = %d, user = '%s')",
1978 ret = PAM_SERVICE_ERR;
1982 /* should not be reached */
1988 iniparser_freedict(d);
1991 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", pamh, ctrl, ret);
1997 int pam_sm_open_session(pam_handle_t *pamh, int flags,
1998 int argc, const char **argv)
2000 int ret = PAM_SYSTEM_ERR;
2001 dictionary *d = NULL;
2003 /* parse arguments */
2004 int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
2006 ret = PAM_SYSTEM_ERR;
2010 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", pamh, ctrl, flags);
2016 iniparser_freedict(d);
2019 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", pamh, ctrl, ret);
2025 int pam_sm_close_session(pam_handle_t *pamh, int flags,
2026 int argc, const char **argv)
2028 dictionary *d = NULL;
2029 int retval = PAM_SUCCESS;
2031 /* parse arguments */
2032 int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
2034 retval = PAM_SYSTEM_ERR;
2038 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", pamh, ctrl, flags);
2040 if (!(flags & PAM_DELETE_CRED)) {
2041 retval = PAM_SUCCESS;
2045 if (ctrl & WINBIND_KRB5_AUTH) {
2047 /* destroy the ccache here */
2048 struct winbindd_request request;
2049 struct winbindd_response response;
2051 const char *ccname = NULL;
2052 struct passwd *pwd = NULL;
2054 ZERO_STRUCT(request);
2055 ZERO_STRUCT(response);
2057 retval = pam_get_user(pamh, &user, "Username: ");
2059 _pam_log(pamh, ctrl, LOG_ERR, "could not identify user");
2064 _pam_log(pamh, ctrl, LOG_ERR, "username was NULL!");
2065 retval = PAM_USER_UNKNOWN;
2069 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "username [%s] obtained", user);
2071 ccname = pam_getenv(pamh, "KRB5CCNAME");
2072 if (ccname == NULL) {
2073 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "user has no KRB5CCNAME environment");
2076 strncpy(request.data.logoff.user, user,
2077 sizeof(request.data.logoff.user) - 1);
2080 strncpy(request.data.logoff.krb5ccname, ccname,
2081 sizeof(request.data.logoff.krb5ccname) - 1);
2084 pwd = getpwnam(user);
2086 retval = PAM_USER_UNKNOWN;
2089 request.data.logoff.uid = pwd->pw_uid;
2091 request.flags = WBFLAG_PAM_KRB5 | WBFLAG_PAM_CONTACT_TRUSTDOM;
2093 retval = pam_winbind_request_log(pamh, ctrl, WINBINDD_PAM_LOGOFF, &request, &response, user);
2098 iniparser_freedict(d);
2101 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", pamh, ctrl, retval);
2107 * evaluate whether we need to re-authenticate with kerberos after a password change
2109 * @param pamh PAM handle
2110 * @param ctrl PAM winbind options.
2111 * @param user The username
2113 * @return boolean Returns True if required, False if not.
2116 static BOOL _pam_require_krb5_auth_after_chauthtok(pam_handle_t *pamh, int ctrl, const char *user)
2119 /* Make sure that we only do this if
2120 * a) the chauthtok got initiated during a logon attempt (authenticate->acct_mgmt->chauthtok)
2121 * b) any later password change via the "passwd" command if done by the user itself
2124 char *new_authtok_reqd_during_auth = NULL;
2125 struct passwd *pwd = NULL;
2127 if (!(ctrl & WINBIND_KRB5_AUTH)) {
2131 _pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH, &new_authtok_reqd_during_auth);
2132 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH, NULL, NULL);
2134 if (new_authtok_reqd_during_auth) {
2138 pwd = getpwnam(user);
2143 if (getuid() == pwd->pw_uid) {
2152 int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
2153 int argc, const char **argv)
2159 /* <DO NOT free() THESE> */
2161 char *pass_old, *pass_new;
2162 /* </DO NOT free() THESE> */
2167 dictionary *d = NULL;
2168 char *username_ret = NULL;
2169 struct winbindd_response response;
2171 ZERO_STRUCT(response);
2173 ctrl = _pam_parse(pamh, flags, argc, argv, &d);
2175 ret = PAM_SYSTEM_ERR;
2179 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", pamh, ctrl, flags);
2181 /* clearing offline bit for the auth in the password change */
2182 ctrl &= ~WINBIND_CACHED_LOGIN;
2185 * First get the name of a user
2187 ret = pam_get_user(pamh, &user, "Username: ");
2189 _pam_log(pamh, ctrl, LOG_ERR,
2190 "password - could not identify user");
2195 _pam_log(pamh, ctrl, LOG_ERR, "username was NULL!");
2196 ret = PAM_USER_UNKNOWN;
2200 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "username [%s] obtained", user);
2202 /* check if this is really a user in winbindd, not only in NSS */
2203 ret = valid_user(pamh, ctrl, user);
2206 ret = PAM_USER_UNKNOWN;
2209 ret = PAM_SYSTEM_ERR;
2216 * obtain and verify the current password (OLDAUTHTOK) for
2220 if (flags & PAM_PRELIM_CHECK) {
2221 time_t pwdlastset_prelim = 0;
2223 /* instruct user what is happening */
2224 #define greeting "Changing password for "
2225 Announce = (char *) malloc(sizeof(greeting) + strlen(user));
2226 if (Announce == NULL) {
2227 _pam_log(pamh, ctrl, LOG_CRIT, "password - out of memory");
2231 (void) strcpy(Announce, greeting);
2232 (void) strcpy(Announce + sizeof(greeting) - 1, user);
2235 lctrl = ctrl | WINBIND__OLD_PASSWORD;
2236 ret = _winbind_read_password(pamh, lctrl,
2238 "(current) NT password: ",
2240 (const char **) &pass_old);
2241 if (ret != PAM_SUCCESS) {
2242 _pam_log(pamh, ctrl, LOG_NOTICE, "password - (old) token not obtained");
2246 /* verify that this is the password for this user */
2248 ret = winbind_auth_request(pamh, ctrl, user, pass_old,
2249 NULL, NULL, 0, &response,
2250 &pwdlastset_prelim, NULL);
2252 if (ret != PAM_ACCT_EXPIRED &&
2253 ret != PAM_AUTHTOK_EXPIRED &&
2254 ret != PAM_NEW_AUTHTOK_REQD &&
2255 ret != PAM_SUCCESS) {
2260 pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET, (void *)pwdlastset_prelim, NULL);
2262 ret = pam_set_item(pamh, PAM_OLDAUTHTOK, (const void *) pass_old);
2264 if (ret != PAM_SUCCESS) {
2265 _pam_log(pamh, ctrl, LOG_CRIT, "failed to set PAM_OLDAUTHTOK");
2267 } else if (flags & PAM_UPDATE_AUTHTOK) {
2269 time_t pwdlastset_update = 0;
2272 * obtain the proposed password
2276 * get the old token back.
2279 ret = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
2281 if (ret != PAM_SUCCESS) {
2282 _pam_log(pamh, ctrl, LOG_NOTICE, "user not authenticated");
2286 lctrl = ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
2288 if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
2289 lctrl |= WINBIND_USE_FIRST_PASS_ARG;
2292 ret = PAM_AUTHTOK_ERR;
2293 while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
2295 * use_authtok is to force the use of a previously entered
2296 * password -- needed for pluggable password strength checking
2299 ret = _winbind_read_password(pamh, lctrl,
2301 "Enter new NT password: ",
2302 "Retype new NT password: ",
2303 (const char **) &pass_new);
2305 if (ret != PAM_SUCCESS) {
2306 _pam_log_debug(pamh, ctrl, LOG_ALERT
2307 ,"password - new password not obtained");
2308 pass_old = NULL;/* tidy up */
2313 * At this point we know who the user is and what they
2314 * propose as their new password. Verify that the new
2315 * password is acceptable.
2318 if (pass_new[0] == '\0') {/* "\0" password = NULL */
2324 * By reaching here we have approved the passwords and must now
2325 * rebuild the password database file.
2327 _pam_get_data( pamh, PAM_WINBIND_PWD_LAST_SET,
2328 &pwdlastset_update);
2330 ret = winbind_chauthtok_request(pamh, ctrl, user, pass_old, pass_new, pwdlastset_update);
2332 _pam_overwrite(pass_new);
2333 _pam_overwrite(pass_old);
2334 pass_old = pass_new = NULL;
2338 if (_pam_require_krb5_auth_after_chauthtok(pamh, ctrl, user)) {
2340 const char *member = get_member_from_config(pamh, argc, argv, ctrl, d);
2341 const char *cctype = get_krb5_cc_type_from_config(pamh, argc, argv, ctrl, d);
2342 const int warn_pwd_expire =
2343 get_warn_pwd_expire_from_config(pamh, argc, argv, ctrl,
2346 ret = winbind_auth_request(pamh, ctrl, user, pass_new,
2347 member, cctype, 0, &response,
2348 NULL, &username_ret);
2349 _pam_overwrite(pass_new);
2350 _pam_overwrite(pass_old);
2351 pass_old = pass_new = NULL;
2353 if (ret == PAM_SUCCESS) {
2355 /* warn a user if the password is about to expire soon */
2356 _pam_warn_password_expiry(pamh, ctrl, &response,
2357 warn_pwd_expire , NULL);
2359 /* set some info3 info for other modules in the stack */
2360 _pam_set_data_info3(pamh, ctrl, &response);
2362 /* put krb5ccname into env */
2363 _pam_setup_krb5_env(pamh, ctrl, response.data.auth.krb5ccname);
2366 pam_set_item (pamh, PAM_USER, username_ret);
2367 _pam_log_debug(pamh, ctrl, LOG_INFO, "Returned user was '%s'", username_ret);
2375 ret = PAM_SERVICE_ERR;
2380 iniparser_freedict(d);
2383 /* Deal with offline errors. */
2384 PAM_WB_REMARK_CHECK_RESPONSE(pamh, ctrl, response, "NT_STATUS_NO_LOGON_SERVERS");
2385 PAM_WB_REMARK_CHECK_RESPONSE(pamh, ctrl, response, "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
2386 PAM_WB_REMARK_CHECK_RESPONSE(pamh, ctrl, response, "NT_STATUS_ACCESS_DENIED");
2388 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", pamh, ctrl, ret);
2395 /* static module data */
2397 struct pam_module _pam_winbind_modstruct = {
2399 pam_sm_authenticate,
2402 pam_sm_open_session,
2403 pam_sm_close_session,
2410 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
2411 * Copyright (c) Tim Potter <tpot@samba.org> 2000
2412 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
2413 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2007
2414 * Copyright (c) Jan Rêkorajski 1999.
2415 * Copyright (c) Andrew G. Morgan 1996-8.
2416 * Copyright (c) Alex O. Yuriev, 1996.
2417 * Copyright (c) Cristian Gafton 1996.
2418 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
2420 * Redistribution and use in source and binary forms, with or without
2421 * modification, are permitted provided that the following conditions
2423 * 1. Redistributions of source code must retain the above copyright
2424 * notice, and the entire permission notice in its entirety,
2425 * including the disclaimer of warranties.
2426 * 2. Redistributions in binary form must reproduce the above copyright
2427 * notice, this list of conditions and the following disclaimer in the
2428 * documentation and/or other materials provided with the distribution.
2429 * 3. The name of the author may not be used to endorse or promote
2430 * products derived from this software without specific prior
2431 * written permission.
2433 * ALTERNATIVELY, this product may be distributed under the terms of
2434 * the GNU Public License, in which case the provisions of the GPL are
2435 * required INSTEAD OF the above restrictions. (This clause is
2436 * necessary due to a potential bad interaction between the GPL and
2437 * the restrictions contained in a BSD-style copyright.)
2439 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
2440 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
2441 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
2442 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
2443 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
2444 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
2445 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2446 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
2447 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
2448 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
2449 * OF THE POSSIBILITY OF SUCH DAMAGE.