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> also
9 contains large slabs of code from pam_unix by Elliot Lee
10 <sopwith@redhat.com> (see copyright below for full details)
13 #include "pam_winbind.h"
15 #define _PAM_LOG_FUNCTION_ENTER(function, pamh, ctrl, flags) \
17 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: %p] ENTER: " \
18 function " (flags: 0x%04x)", pamh, flags); \
19 _pam_log_state(pamh, ctrl); \
22 #define _PAM_LOG_FUNCTION_LEAVE(function, pamh, ctrl, retval) \
24 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: %p] LEAVE: " \
25 function " returning %d", pamh, retval); \
26 _pam_log_state(pamh, ctrl); \
31 #define MAX_PASSWD_TRIES 3
34 * Work around the pam API that has functions with void ** as parameters
35 * These lead to strict aliasing warnings with gcc.
37 static int _pam_get_item(const pam_handle_t *pamh,
41 const void **item = (const void **)_item;
42 return pam_get_item(pamh, item_type, item);
44 static int _pam_get_data(const pam_handle_t *pamh,
45 const char *module_data_name,
48 const void **data = (const void **)_data;
49 return pam_get_data(pamh, module_data_name, data);
54 #ifdef HAVE_PAM_VSYSLOG
55 static void _pam_log_int(const pam_handle_t *pamh,
60 pam_vsyslog(pamh, err, format, args);
63 static void _pam_log_int(const pam_handle_t *pamh,
71 _pam_get_item(pamh, PAM_SERVICE, &service);
73 format2 = malloc(strlen(MODULE_NAME)+strlen(format)+strlen(service)+5);
74 if (format2 == NULL) {
75 /* what else todo ? */
76 vsyslog(err, format, args);
80 sprintf(format2, "%s(%s): %s", MODULE_NAME, service, format);
81 vsyslog(err, format2, args);
84 #endif /* HAVE_PAM_VSYSLOG */
86 static bool _pam_log_is_silent(int ctrl)
88 return on(ctrl, WINBIND_SILENT);
91 static void _pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
92 static void _pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
96 if (_pam_log_is_silent(ctrl)) {
100 va_start(args, format);
101 _pam_log_int(pamh, err, format, args);
105 static bool _pam_log_is_debug_enabled(int ctrl)
111 if (_pam_log_is_silent(ctrl)) {
115 if (!(ctrl & WINBIND_DEBUG_ARG)) {
122 static bool _pam_log_is_debug_state_enabled(int ctrl)
124 if (!(ctrl & WINBIND_DEBUG_STATE)) {
128 return _pam_log_is_debug_enabled(ctrl);
131 static void _pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
132 static void _pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
136 if (!_pam_log_is_debug_enabled(ctrl)) {
140 va_start(args, format);
141 _pam_log_int(pamh, err, format, args);
145 static void _pam_log_state_datum(const pam_handle_t *pamh,
151 const void *data = NULL;
152 if (item_type != 0) {
153 pam_get_item(pamh, item_type, &data);
155 pam_get_data(pamh, key, &data);
158 const char *type = (item_type != 0) ? "ITEM" : "DATA";
159 if (is_string != 0) {
160 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
161 "[pamh: %p] STATE: %s(%s) = \"%s\" (%p)",
162 pamh, type, key, (const char *)data,
165 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
166 "[pamh: %p] STATE: %s(%s) = %p",
167 pamh, type, key, data);
172 #define _PAM_LOG_STATE_DATA_POINTER(pamh, ctrl, module_data_name) \
173 _pam_log_state_datum(pamh, ctrl, 0, module_data_name, 0)
175 #define _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, module_data_name) \
176 _pam_log_state_datum(pamh, ctrl, 0, module_data_name, 1)
178 #define _PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, item_type) \
179 _pam_log_state_datum(pamh, ctrl, item_type, #item_type, 0)
181 #define _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, item_type) \
182 _pam_log_state_datum(pamh, ctrl, item_type, #item_type, 1)
184 #ifdef DEBUG_PASSWORD
185 #define _LOG_PASSWORD_AS_STRING 1
187 #define _LOG_PASSWORD_AS_STRING 0
190 #define _PAM_LOG_STATE_ITEM_PASSWORD(pamh, ctrl, item_type) \
191 _pam_log_state_datum(pamh, ctrl, item_type, #item_type, \
192 _LOG_PASSWORD_AS_STRING)
194 static void _pam_log_state(const pam_handle_t *pamh, int ctrl)
196 if (!_pam_log_is_debug_state_enabled(ctrl)) {
200 _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_SERVICE);
201 _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_USER);
202 _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_TTY);
203 _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_RHOST);
204 _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_RUSER);
205 _PAM_LOG_STATE_ITEM_PASSWORD(pamh, ctrl, PAM_OLDAUTHTOK);
206 _PAM_LOG_STATE_ITEM_PASSWORD(pamh, ctrl, PAM_AUTHTOK);
207 _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_USER_PROMPT);
208 _PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, PAM_CONV);
209 #ifdef PAM_FAIL_DELAY
210 _PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, PAM_FAIL_DELAY);
212 #ifdef PAM_REPOSITORY
213 _PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, PAM_REPOSITORY);
216 _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_HOMEDIR);
217 _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_LOGONSCRIPT);
218 _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_LOGONSERVER);
219 _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_PROFILEPATH);
220 _PAM_LOG_STATE_DATA_STRING(pamh, ctrl,
221 PAM_WINBIND_NEW_AUTHTOK_REQD);
222 /* Use atoi to get PAM result code */
223 _PAM_LOG_STATE_DATA_STRING(pamh, ctrl,
224 PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
225 _PAM_LOG_STATE_DATA_POINTER(pamh, ctrl, PAM_WINBIND_PWD_LAST_SET);
228 static int _pam_parse(const pam_handle_t *pamh,
232 dictionary **result_d)
235 const char *config_file = NULL;
238 dictionary *d = NULL;
240 if (flags & PAM_SILENT) {
241 ctrl |= WINBIND_SILENT;
244 for (i=argc,v=argv; i-- > 0; ++v) {
245 if (!strncasecmp(*v, "config", strlen("config"))) {
246 ctrl |= WINBIND_CONFIG_FILE;
252 if (config_file == NULL) {
253 config_file = PAM_WINBIND_CONFIG_FILE;
256 d = iniparser_load(config_file);
258 goto config_from_pam;
261 if (iniparser_getboolean(d, "global:debug", false)) {
262 ctrl |= WINBIND_DEBUG_ARG;
265 if (iniparser_getboolean(d, "global:debug_state", false)) {
266 ctrl |= WINBIND_DEBUG_STATE;
269 if (iniparser_getboolean(d, "global:cached_login", false)) {
270 ctrl |= WINBIND_CACHED_LOGIN;
273 if (iniparser_getboolean(d, "global:krb5_auth", false)) {
274 ctrl |= WINBIND_KRB5_AUTH;
277 if (iniparser_getboolean(d, "global:silent", false)) {
278 ctrl |= WINBIND_SILENT;
281 if (iniparser_getstr(d, "global:krb5_ccache_type") != NULL) {
282 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
285 if ((iniparser_getstr(d, "global:require-membership-of") != NULL) ||
286 (iniparser_getstr(d, "global:require_membership_of") != NULL)) {
287 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
290 if (iniparser_getboolean(d, "global:try_first_pass", false)) {
291 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
294 if (iniparser_getint(d, "global:warn_pwd_expire", 0)) {
295 ctrl |= WINBIND_WARN_PWD_EXPIRE;
299 /* step through arguments */
300 for (i=argc,v=argv; i-- > 0; ++v) {
302 /* generic options */
303 if (!strcmp(*v,"debug"))
304 ctrl |= WINBIND_DEBUG_ARG;
305 else if (!strcasecmp(*v, "debug_state"))
306 ctrl |= WINBIND_DEBUG_STATE;
307 else if (!strcasecmp(*v, "silent"))
308 ctrl |= WINBIND_SILENT;
309 else if (!strcasecmp(*v, "use_authtok"))
310 ctrl |= WINBIND_USE_AUTHTOK_ARG;
311 else if (!strcasecmp(*v, "use_first_pass"))
312 ctrl |= WINBIND_USE_FIRST_PASS_ARG;
313 else if (!strcasecmp(*v, "try_first_pass"))
314 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
315 else if (!strcasecmp(*v, "unknown_ok"))
316 ctrl |= WINBIND_UNKNOWN_OK_ARG;
317 else if (!strncasecmp(*v, "require_membership_of",
318 strlen("require_membership_of")))
319 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
320 else if (!strncasecmp(*v, "require-membership-of",
321 strlen("require-membership-of")))
322 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
323 else if (!strcasecmp(*v, "krb5_auth"))
324 ctrl |= WINBIND_KRB5_AUTH;
325 else if (!strncasecmp(*v, "krb5_ccache_type",
326 strlen("krb5_ccache_type")))
327 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
328 else if (!strcasecmp(*v, "cached_login"))
329 ctrl |= WINBIND_CACHED_LOGIN;
331 _pam_log(pamh, ctrl, LOG_ERR,
332 "pam_parse: unknown option: %s", *v);
342 iniparser_freedict(d);
349 static void _pam_winbind_cleanup_func(pam_handle_t *pamh,
353 int ctrl = _pam_parse(pamh, 0, 0, NULL, NULL);
354 if (_pam_log_is_debug_state_enabled(ctrl)) {
355 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
356 "[pamh: %p] CLEAN: cleaning up PAM data %p "
357 "(error_status = %d)", pamh, data,
364 static const struct ntstatus_errors {
365 const char *ntstatus_string;
366 const char *error_string;
367 } ntstatus_errors[] = {
370 {"NT_STATUS_BACKUP_CONTROLLER",
371 "No primary Domain Controler available"},
372 {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
373 "No domain controllers found"},
374 {"NT_STATUS_NO_LOGON_SERVERS",
376 {"NT_STATUS_PWD_TOO_SHORT",
377 "Password too short"},
378 {"NT_STATUS_PWD_TOO_RECENT",
379 "The password of this user is too recent to change"},
380 {"NT_STATUS_PWD_HISTORY_CONFLICT",
381 "Password is already in password history"},
382 {"NT_STATUS_PASSWORD_EXPIRED",
383 "Your password has expired"},
384 {"NT_STATUS_PASSWORD_MUST_CHANGE",
385 "You need to change your password now"},
386 {"NT_STATUS_INVALID_WORKSTATION",
387 "You are not allowed to logon from this workstation"},
388 {"NT_STATUS_INVALID_LOGON_HOURS",
389 "You are not allowed to logon at this time"},
390 {"NT_STATUS_ACCOUNT_EXPIRED",
391 "Your account has expired. "
392 "Please contact your System administrator"}, /* SCNR */
393 {"NT_STATUS_ACCOUNT_DISABLED",
394 "Your account is disabled. "
395 "Please contact your System administrator"}, /* SCNR */
396 {"NT_STATUS_ACCOUNT_LOCKED_OUT",
397 "Your account has been locked. "
398 "Please contact your System administrator"}, /* SCNR */
399 {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
400 "Invalid Trust Account"},
401 {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
402 "Invalid Trust Account"},
403 {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
404 "Invalid Trust Account"},
405 {"NT_STATUS_ACCESS_DENIED",
410 const char *_get_ntstatus_error_string(const char *nt_status_string)
413 for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
414 if (!strcasecmp(ntstatus_errors[i].ntstatus_string,
416 return ntstatus_errors[i].error_string;
422 /* --- authentication management functions --- */
424 /* Attempt a conversation */
426 static int converse(pam_handle_t *pamh,
428 struct pam_message **message,
429 struct pam_response **response)
432 struct pam_conv *conv;
434 retval = _pam_get_item(pamh, PAM_CONV, &conv);
435 if (retval == PAM_SUCCESS) {
436 retval = conv->conv(nargs,
437 (const struct pam_message **)message,
438 response, conv->appdata_ptr);
441 return retval; /* propagate error status */
445 static int _make_remark(pam_handle_t * pamh,
450 int retval = PAM_SUCCESS;
452 struct pam_message *pmsg[1], msg[1];
453 struct pam_response *resp;
455 if (flags & WINBIND_SILENT) {
460 msg[0].msg = discard_const_p(char, text);
461 msg[0].msg_style = type;
464 retval = converse(pamh, 1, pmsg, &resp);
467 _pam_drop_reply(resp, 1);
472 static int _make_remark_v(pam_handle_t *pamh,
481 ret = vasprintf(&var, format, args);
483 _pam_log(pamh, 0, LOG_ERR, "memory allocation failure");
487 ret = _make_remark(pamh, flags, type, var);
492 static int _make_remark_format(pam_handle_t * pamh, int flags, int type, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
493 static int _make_remark_format(pam_handle_t * pamh, int flags, int type, const char *format, ...)
498 va_start(args, format);
499 ret = _make_remark_v(pamh, flags, type, format, args);
504 static int pam_winbind_request(pam_handle_t *pamh,
506 enum winbindd_cmd req_type,
507 struct winbindd_request *request,
508 struct winbindd_response *response)
510 /* Fill in request and send down pipe */
511 winbindd_init_request(request, req_type);
513 if (winbind_write_sock(request, sizeof(*request), 0, 0) == -1) {
514 _pam_log(pamh, ctrl, LOG_ERR,
515 "pam_winbind_request: write to socket failed!");
516 winbind_close_sock();
517 return PAM_SERVICE_ERR;
521 if (winbindd_read_reply(response) == -1) {
522 _pam_log(pamh, ctrl, LOG_ERR,
523 "pam_winbind_request: read from socket failed!");
524 winbind_close_sock();
525 return PAM_SERVICE_ERR;
528 /* We are done with the socket - close it and avoid mischeif */
529 winbind_close_sock();
531 /* Copy reply data from socket */
532 if (response->result == WINBINDD_OK) {
536 /* no need to check for pam_error codes for getpwnam() */
539 case WINBINDD_GETPWNAM:
540 case WINBINDD_LOOKUPNAME:
541 if (strlen(response->data.auth.nt_status_string) > 0) {
542 _pam_log(pamh, ctrl, LOG_ERR,
543 "request failed, NT error was %s",
544 response->data.auth.nt_status_string);
546 _pam_log(pamh, ctrl, LOG_ERR, "request failed");
548 return PAM_USER_UNKNOWN;
553 if (response->data.auth.pam_error != PAM_SUCCESS) {
554 _pam_log(pamh, ctrl, LOG_ERR,
555 "request failed: %s, "
556 "PAM error was %s (%d), NT error was %s",
557 response->data.auth.error_string,
558 pam_strerror(pamh, response->data.auth.pam_error),
559 response->data.auth.pam_error,
560 response->data.auth.nt_status_string);
561 return response->data.auth.pam_error;
564 _pam_log(pamh, ctrl, LOG_ERR, "request failed, but PAM error 0!");
566 return PAM_SERVICE_ERR;
569 static int pam_winbind_request_log(pam_handle_t *pamh,
571 enum winbindd_cmd req_type,
572 struct winbindd_request *request,
573 struct winbindd_response *response,
578 retval = pam_winbind_request(pamh, ctrl, req_type, request, response);
582 /* incorrect password */
583 _pam_log(pamh, ctrl, LOG_WARNING, "user '%s' denied access "
584 "(incorrect password or invalid membership)", user);
586 case PAM_ACCT_EXPIRED:
587 /* account expired */
588 _pam_log(pamh, ctrl, LOG_WARNING, "user '%s' account expired",
591 case PAM_AUTHTOK_EXPIRED:
592 /* password expired */
593 _pam_log(pamh, ctrl, LOG_WARNING, "user '%s' password expired",
596 case PAM_NEW_AUTHTOK_REQD:
597 /* new password required */
598 _pam_log(pamh, ctrl, LOG_WARNING, "user '%s' new password "
601 case PAM_USER_UNKNOWN:
602 /* the user does not exist */
603 _pam_log_debug(pamh, ctrl, LOG_NOTICE, "user '%s' not found",
605 if (ctrl & WINBIND_UNKNOWN_OK_ARG) {
610 /* Otherwise, the authentication looked good */
614 case WINBINDD_PAM_AUTH:
615 _pam_log(pamh, ctrl, LOG_NOTICE,
616 "user '%s' granted access", user);
618 case WINBINDD_PAM_CHAUTHTOK:
619 _pam_log(pamh, ctrl, LOG_NOTICE,
620 "user '%s' password changed", user);
623 _pam_log(pamh, ctrl, LOG_NOTICE,
624 "user '%s' OK", user);
630 /* we don't know anything about this return value */
631 _pam_log(pamh, ctrl, LOG_ERR,
632 "internal module error (retval = %d, user = '%s')",
639 * send a password expiry message if required
641 * @param pamh PAM handle
642 * @param ctrl PAM winbind options.
643 * @param next_change expected (calculated) next expiry date.
644 * @param already_expired pointer to a boolean to indicate if the password is
647 * @return boolean Returns true if message has been sent, false if not.
650 static bool _pam_send_password_expiry_message(pam_handle_t *pamh,
655 bool *already_expired)
658 struct tm tm_now, tm_next_change;
660 if (already_expired) {
661 *already_expired = false;
664 if (next_change <= now) {
665 PAM_WB_REMARK_DIRECT(pamh, ctrl, "NT_STATUS_PASSWORD_EXPIRED");
666 if (already_expired) {
667 *already_expired = true;
672 if ((next_change < 0) ||
673 (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
677 if ((localtime_r(&now, &tm_now) == NULL) ||
678 (localtime_r(&next_change, &tm_next_change) == NULL)) {
682 days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) -
683 (tm_now.tm_yday+tm_now.tm_year*365);
686 _make_remark(pamh, ctrl, PAM_TEXT_INFO,
687 "Your password expires today");
691 if (days > 0 && days < warn_pwd_expire) {
692 _make_remark_format(pamh, ctrl, PAM_TEXT_INFO,
693 "Your password will expire in %d %s",
694 days, (days > 1) ? "days":"day");
702 * Send a warning if the password expires in the near future
704 * @param pamh PAM handle
705 * @param ctrl PAM winbind options.
706 * @param response The full authentication response structure.
707 * @param already_expired boolean, is the pwd already expired?
712 static void _pam_warn_password_expiry(pam_handle_t *pamh,
714 const struct winbindd_response *response,
716 bool *already_expired)
718 time_t now = time(NULL);
719 time_t next_change = 0;
721 if (already_expired) {
722 *already_expired = false;
725 /* accounts with ACB_PWNOEXP set never receive a warning */
726 if (response->data.auth.info3.acct_flags & ACB_PWNOEXP) {
730 /* no point in sending a warning if this is a grace logon */
731 if (PAM_WB_GRACE_LOGON(response->data.auth.info3.user_flgs)) {
735 /* check if the info3 must change timestamp has been set */
736 next_change = response->data.auth.info3.pass_must_change_time;
738 if (_pam_send_password_expiry_message(pamh, flags, next_change, now,
744 /* now check for the global password policy */
745 /* good catch from Ralf Haferkamp: an expiry of "never" is translated
747 if (response->data.auth.policy.expire <= 0) {
751 next_change = response->data.auth.info3.pass_last_set_time +
752 response->data.auth.policy.expire;
754 if (_pam_send_password_expiry_message(pamh, flags, next_change, now,
760 /* no warning sent */
763 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
766 * Append a string, making sure not to overflow and to always return a
767 * NULL-terminated string.
769 * @param dest Destination string buffer (must already be NULL-terminated).
770 * @param src Source string buffer.
771 * @param dest_buffer_size Size of dest buffer in bytes.
773 * @return false if dest buffer is not big enough (no bytes copied), true on
777 static bool safe_append_string(char *dest,
779 int dest_buffer_size)
781 int dest_length = strlen(dest);
782 int src_length = strlen(src);
784 if (dest_length + src_length + 1 > dest_buffer_size) {
788 memcpy(dest + dest_length, src, src_length + 1);
793 * Convert a names into a SID string, appending it to a buffer.
795 * @param pamh PAM handle
796 * @param ctrl PAM winbind options.
797 * @param user User in PAM request.
798 * @param name Name to convert.
799 * @param sid_list_buffer Where to append the string sid.
800 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
802 * @return false on failure, true on success.
804 static bool winbind_name_to_sid_string(pam_handle_t *pamh,
808 char *sid_list_buffer,
809 int sid_list_buffer_size)
811 const char* sid_string;
812 struct winbindd_response sid_response;
815 if (IS_SID_STRING(name)) {
818 struct winbindd_request sid_request;
820 ZERO_STRUCT(sid_request);
821 ZERO_STRUCT(sid_response);
823 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
824 "no sid given, looking up: %s\n", name);
826 /* fortunatly winbindd can handle non-separated names */
827 strncpy(sid_request.data.name.name, name,
828 sizeof(sid_request.data.name.name) - 1);
830 if (pam_winbind_request_log(pamh, ctrl, WINBINDD_LOOKUPNAME,
831 &sid_request, &sid_response,
833 _pam_log(pamh, ctrl, LOG_INFO,
834 "could not lookup name: %s\n", name);
838 sid_string = sid_response.data.sid.sid;
841 if (!safe_append_string(sid_list_buffer, sid_string,
842 sid_list_buffer_size)) {
850 * Convert a list of names into a list of sids.
852 * @param pamh PAM handle
853 * @param ctrl PAM winbind options.
854 * @param user User in PAM request.
855 * @param name_list List of names or string sids, separated by commas.
856 * @param sid_list_buffer Where to put the list of string sids.
857 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
859 * @return false on failure, true on success.
861 static bool winbind_name_list_to_sid_string_list(pam_handle_t *pamh,
864 const char *name_list,
865 char *sid_list_buffer,
866 int sid_list_buffer_size)
869 char *current_name = NULL;
870 const char *search_location;
873 if (sid_list_buffer_size > 0) {
874 sid_list_buffer[0] = 0;
877 search_location = name_list;
878 while ((comma = strstr(search_location, ",")) != NULL) {
879 current_name = strndup(search_location,
880 comma - search_location);
881 if (NULL == current_name) {
885 if (!winbind_name_to_sid_string(pamh, ctrl, user,
888 sid_list_buffer_size)) {
892 SAFE_FREE(current_name);
894 if (!safe_append_string(sid_list_buffer, ",",
895 sid_list_buffer_size)) {
899 search_location = comma + 1;
902 if (!winbind_name_to_sid_string(pamh, ctrl, user, search_location,
904 sid_list_buffer_size)) {
911 SAFE_FREE(current_name);
916 * put krb5ccname variable into environment
918 * @param pamh PAM handle
919 * @param ctrl PAM winbind options.
920 * @param krb5ccname env variable retrieved from winbindd.
925 static void _pam_setup_krb5_env(pam_handle_t *pamh,
927 const char *krb5ccname)
932 if (off(ctrl, WINBIND_KRB5_AUTH)) {
936 if (!krb5ccname || (strlen(krb5ccname) == 0)) {
940 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
941 "request returned KRB5CCNAME: %s", krb5ccname);
943 if (snprintf(var, sizeof(var), "KRB5CCNAME=%s", krb5ccname) == -1) {
947 ret = pam_putenv(pamh, var);
949 _pam_log(pamh, ctrl, LOG_ERR,
950 "failed to set KRB5CCNAME to %s: %s",
951 var, pam_strerror(pamh, ret));
956 * Set string into the PAM stack.
958 * @param pamh PAM handle
959 * @param ctrl PAM winbind options.
960 * @param data_name Key name for pam_set_data.
961 * @param value String value.
966 static void _pam_set_data_string(pam_handle_t *pamh,
968 const char *data_name,
973 if (!data_name || !value || (strlen(data_name) == 0) ||
974 (strlen(value) == 0)) {
978 ret = pam_set_data(pamh, data_name, (void *)strdup(value),
979 _pam_winbind_cleanup_func);
981 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
982 "Could not set data %s: %s\n",
983 data_name, pam_strerror(pamh, ret));
989 * Set info3 strings into the PAM stack.
991 * @param pamh PAM handle
992 * @param ctrl PAM winbind options.
993 * @param data_name Key name for pam_set_data.
994 * @param value String value.
999 static void _pam_set_data_info3(pam_handle_t *pamh,
1001 struct winbindd_response *response)
1003 _pam_set_data_string(pamh, ctrl, PAM_WINBIND_HOMEDIR,
1004 response->data.auth.info3.home_dir);
1005 _pam_set_data_string(pamh, ctrl, PAM_WINBIND_LOGONSCRIPT,
1006 response->data.auth.info3.logon_script);
1007 _pam_set_data_string(pamh, ctrl, PAM_WINBIND_LOGONSERVER,
1008 response->data.auth.info3.logon_srv);
1009 _pam_set_data_string(pamh, ctrl, PAM_WINBIND_PROFILEPATH,
1010 response->data.auth.info3.profile_path);
1014 * Free info3 strings in the PAM stack.
1016 * @param pamh PAM handle
1021 static void _pam_free_data_info3(pam_handle_t *pamh)
1023 pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1024 pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1025 pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1026 pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1030 * Send PAM_ERROR_MSG for cached or grace logons.
1032 * @param pamh PAM handle
1033 * @param ctrl PAM winbind options.
1034 * @param username User in PAM request.
1035 * @param info3_user_flgs Info3 flags containing logon type bits.
1040 static void _pam_warn_logon_type(pam_handle_t *pamh,
1042 const char *username,
1043 uint32_t info3_user_flgs)
1045 /* inform about logon type */
1046 if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1048 _make_remark(pamh, ctrl, PAM_ERROR_MSG,
1050 "Please change your password as soon you're "
1052 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
1053 "User %s logged on using grace logon\n",
1056 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1058 _make_remark(pamh, ctrl, PAM_ERROR_MSG,
1059 "Domain Controller unreachable, "
1060 "using cached credentials instead. "
1061 "Network resources may be unavailable");
1062 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
1063 "User %s logged on using cached credentials\n",
1069 * Send PAM_ERROR_MSG for krb5 errors.
1071 * @param pamh PAM handle
1072 * @param ctrl PAM winbind options.
1073 * @param username User in PAM request.
1074 * @param info3_user_flgs Info3 flags containing logon type bits.
1079 static void _pam_warn_krb5_failure(pam_handle_t *pamh,
1081 const char *username,
1082 uint32_t info3_user_flgs)
1084 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1085 _make_remark(pamh, ctrl, PAM_ERROR_MSG,
1086 "Failed to establish your Kerberos Ticket cache "
1087 "due time differences\n"
1088 "with the domain controller. "
1089 "Please verify the system time.\n");
1090 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
1091 "User %s: Clock skew when getting Krb5 TGT\n",
1097 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1099 * @param response The struct winbindd_response.
1101 * @return string (caller needs to free).
1104 static char *_pam_compose_pwd_restriction_string(struct winbindd_response *response)
1107 size_t offset = 0, ret = 0, str_size = 1024;
1109 str = (char *)malloc(str_size);
1114 memset(str, '\0', str_size);
1116 offset = snprintf(str, str_size, "Your password ");
1121 if (response->data.auth.policy.min_length_password > 0) {
1122 ret = snprintf(str+offset, str_size-offset,
1123 "must be at least %d characters; ",
1124 response->data.auth.policy.min_length_password);
1131 if (response->data.auth.policy.password_history > 0) {
1132 ret = snprintf(str+offset, str_size-offset,
1133 "cannot repeat any of your previous %d "
1135 response->data.auth.policy.password_history);
1142 if (response->data.auth.policy.password_properties &
1143 DOMAIN_PASSWORD_COMPLEX) {
1144 ret = snprintf(str+offset, str_size-offset,
1145 "must contain capitals, numerals "
1147 "and cannot contain your account "
1155 ret = snprintf(str+offset, str_size-offset,
1156 "Please type a different password. "
1157 "Type a password which meets these requirements in "
1158 "both text boxes.");
1170 /* talk to winbindd */
1171 static int winbind_auth_request(pam_handle_t * pamh,
1177 const int warn_pwd_expire,
1178 struct winbindd_response *p_response,
1179 time_t *pwd_last_set,
1182 struct winbindd_request request;
1183 struct winbindd_response response;
1185 bool already_expired = false;
1187 ZERO_STRUCT(request);
1188 ZERO_STRUCT(response);
1194 strncpy(request.data.auth.user, user,
1195 sizeof(request.data.auth.user)-1);
1197 strncpy(request.data.auth.pass, pass,
1198 sizeof(request.data.auth.pass)-1);
1200 request.data.auth.krb5_cc_type[0] = '\0';
1201 request.data.auth.uid = -1;
1203 request.flags = WBFLAG_PAM_INFO3_TEXT |
1204 WBFLAG_PAM_CONTACT_TRUSTDOM;
1206 if (ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1207 struct passwd *pwd = NULL;
1209 pwd = getpwnam(user);
1211 return PAM_USER_UNKNOWN;
1213 request.data.auth.uid = pwd->pw_uid;
1216 if (ctrl & WINBIND_KRB5_AUTH) {
1218 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
1219 "enabling krb5 login flag\n");
1221 request.flags |= WBFLAG_PAM_KRB5 |
1222 WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1225 if (ctrl & WINBIND_CACHED_LOGIN) {
1226 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
1227 "enabling cached login flag\n");
1228 request.flags |= WBFLAG_PAM_CACHED_LOGIN;
1233 request.flags |= WBFLAG_PAM_UNIX_NAME;
1236 if (cctype != NULL) {
1237 strncpy(request.data.auth.krb5_cc_type, cctype,
1238 sizeof(request.data.auth.krb5_cc_type) - 1);
1239 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
1240 "enabling request for a %s krb5 ccache\n",
1244 request.data.auth.require_membership_of_sid[0] = '\0';
1246 if (member != NULL) {
1248 if (!winbind_name_list_to_sid_string_list(pamh, ctrl, user,
1250 request.data.auth.require_membership_of_sid,
1251 sizeof(request.data.auth.require_membership_of_sid))) {
1253 _pam_log_debug(pamh, ctrl, LOG_ERR,
1254 "failed to serialize membership of sid "
1255 "\"%s\"\n", member);
1256 return PAM_AUTH_ERR;
1260 ret = pam_winbind_request_log(pamh, ctrl, WINBINDD_PAM_AUTH,
1261 &request, &response, user);
1264 *pwd_last_set = response.data.auth.info3.pass_last_set_time;
1268 /* We want to process the response in the caller. */
1269 *p_response = response;
1274 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1275 "NT_STATUS_PASSWORD_EXPIRED");
1276 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1277 "NT_STATUS_PASSWORD_MUST_CHANGE");
1278 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1279 "NT_STATUS_INVALID_WORKSTATION");
1280 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1281 "NT_STATUS_INVALID_LOGON_HOURS");
1282 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1283 "NT_STATUS_ACCOUNT_EXPIRED");
1284 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1285 "NT_STATUS_ACCOUNT_DISABLED");
1286 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1287 "NT_STATUS_ACCOUNT_LOCKED_OUT");
1288 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1289 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT");
1290 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1291 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT");
1292 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1293 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT");
1294 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1295 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
1296 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1297 "NT_STATUS_NO_LOGON_SERVERS");
1298 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1299 "NT_STATUS_WRONG_PASSWORD");
1300 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1301 "NT_STATUS_ACCESS_DENIED");
1304 if (ret == PAM_SUCCESS) {
1306 /* warn a user if the password is about to expire soon */
1307 _pam_warn_password_expiry(pamh, ctrl, &response,
1311 if (already_expired == true) {
1312 SMB_TIME_T last_set;
1313 last_set = response.data.auth.info3.pass_last_set_time;
1314 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
1315 "Password has expired "
1316 "(Password was last set: %lld, "
1317 "the policy says it should expire here "
1318 "%lld (now it's: %lu))\n",
1319 (long long int)last_set,
1320 (long long int)last_set +
1321 response.data.auth.policy.expire,
1324 return PAM_AUTHTOK_EXPIRED;
1327 /* inform about logon type */
1328 _pam_warn_logon_type(pamh, ctrl, user,
1329 response.data.auth.info3.user_flgs);
1331 /* inform about krb5 failures */
1332 _pam_warn_krb5_failure(pamh, ctrl, user,
1333 response.data.auth.info3.user_flgs);
1335 /* set some info3 info for other modules in the stack */
1336 _pam_set_data_info3(pamh, ctrl, &response);
1338 /* put krb5ccname into env */
1339 _pam_setup_krb5_env(pamh, ctrl, response.data.auth.krb5ccname);
1341 /* If winbindd returned a username, return the pointer to it
1343 if (user_ret && response.extra_data.data) {
1344 /* We have to trust it's a null terminated string. */
1345 *user_ret = (char *)response.extra_data.data;
1352 /* talk to winbindd */
1353 static int winbind_chauthtok_request(pam_handle_t * pamh,
1356 const char *oldpass,
1357 const char *newpass,
1358 time_t pwd_last_set)
1360 struct winbindd_request request;
1361 struct winbindd_response response;
1364 ZERO_STRUCT(request);
1365 ZERO_STRUCT(response);
1367 if (request.data.chauthtok.user == NULL) {
1371 strncpy(request.data.chauthtok.user, user,
1372 sizeof(request.data.chauthtok.user) - 1);
1374 if (oldpass != NULL) {
1375 strncpy(request.data.chauthtok.oldpass, oldpass,
1376 sizeof(request.data.chauthtok.oldpass) - 1);
1378 request.data.chauthtok.oldpass[0] = '\0';
1381 if (newpass != NULL) {
1382 strncpy(request.data.chauthtok.newpass, newpass,
1383 sizeof(request.data.chauthtok.newpass) - 1);
1385 request.data.chauthtok.newpass[0] = '\0';
1388 if (ctrl & WINBIND_KRB5_AUTH) {
1389 request.flags = WBFLAG_PAM_KRB5 |
1390 WBFLAG_PAM_CONTACT_TRUSTDOM;
1393 ret = pam_winbind_request_log(pamh, ctrl, WINBINDD_PAM_CHAUTHTOK,
1394 &request, &response, user);
1396 if (ret == PAM_SUCCESS) {
1400 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1401 "NT_STATUS_BACKUP_CONTROLLER");
1402 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1403 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
1404 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1405 "NT_STATUS_NO_LOGON_SERVERS");
1406 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1407 "NT_STATUS_ACCESS_DENIED");
1409 /* TODO: tell the min pwd length ? */
1410 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1411 "NT_STATUS_PWD_TOO_SHORT");
1413 /* TODO: tell the minage ? */
1414 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1415 "NT_STATUS_PWD_TOO_RECENT");
1417 /* TODO: tell the history length ? */
1418 PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response,
1419 "NT_STATUS_PWD_HISTORY_CONFLICT");
1421 if (!strcasecmp(response.data.auth.nt_status_string,
1422 "NT_STATUS_PASSWORD_RESTRICTION")) {
1424 char *pwd_restriction_string = NULL;
1425 SMB_TIME_T min_pwd_age;
1426 uint32_t reject_reason = response.data.auth.reject_reason;
1427 min_pwd_age = response.data.auth.policy.min_passwordage;
1429 /* FIXME: avoid to send multiple PAM messages after another */
1430 switch (reject_reason) {
1433 case REJECT_REASON_OTHER:
1434 if ((min_pwd_age > 0) &&
1435 (pwd_last_set + min_pwd_age > time(NULL))) {
1436 PAM_WB_REMARK_DIRECT(pamh, ctrl,
1437 "NT_STATUS_PWD_TOO_RECENT");
1440 case REJECT_REASON_TOO_SHORT:
1441 PAM_WB_REMARK_DIRECT(pamh, ctrl,
1442 "NT_STATUS_PWD_TOO_SHORT");
1444 case REJECT_REASON_IN_HISTORY:
1445 PAM_WB_REMARK_DIRECT(pamh, ctrl,
1446 "NT_STATUS_PWD_HISTORY_CONFLICT");
1448 case REJECT_REASON_NOT_COMPLEX:
1449 _make_remark(pamh, ctrl, PAM_ERROR_MSG,
1450 "Password does not meet "
1451 "complexity requirements");
1454 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
1455 "unknown password change "
1456 "reject reason: %d",
1461 pwd_restriction_string =
1462 _pam_compose_pwd_restriction_string(&response);
1463 if (pwd_restriction_string) {
1464 _make_remark(pamh, ctrl, PAM_ERROR_MSG,
1465 pwd_restriction_string);
1466 SAFE_FREE(pwd_restriction_string);
1474 * Checks if a user has an account
1477 * 1 = User not found
1481 static int valid_user(pam_handle_t *pamh,
1485 /* check not only if the user is available over NSS calls, also make
1486 * sure it's really a winbind user, this is important when stacking PAM
1487 * modules in the 'account' or 'password' facility. */
1489 struct passwd *pwd = NULL;
1490 struct winbindd_request request;
1491 struct winbindd_response response;
1494 ZERO_STRUCT(request);
1495 ZERO_STRUCT(response);
1497 pwd = getpwnam(user);
1502 strncpy(request.data.username, user,
1503 sizeof(request.data.username) - 1);
1505 ret = pam_winbind_request_log(pamh, ctrl, WINBINDD_GETPWNAM,
1506 &request, &response, user);
1509 case PAM_USER_UNKNOWN:
1519 static char *_pam_delete(register char *xx)
1527 * obtain a password from the user
1530 static int _winbind_read_password(pam_handle_t * pamh,
1532 const char *comment,
1533 const char *prompt1,
1534 const char *prompt2,
1542 _pam_log(pamh, ctrl, LOG_DEBUG, "getting password (0x%08x)", ctrl);
1545 * make sure nothing inappropriate gets returned
1548 *pass = token = NULL;
1551 * which authentication token are we getting?
1554 if (on(WINBIND__OLD_PASSWORD, ctrl)) {
1555 authtok_flag = PAM_OLDAUTHTOK;
1557 authtok_flag = PAM_AUTHTOK;
1561 * should we obtain the password from a PAM item ?
1564 if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
1565 on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
1566 retval = _pam_get_item(pamh, authtok_flag, &item);
1567 if (retval != PAM_SUCCESS) {
1569 _pam_log(pamh, ctrl, LOG_ALERT,
1570 "pam_get_item returned error "
1571 "to unix-read-password");
1573 } else if (item != NULL) { /* we have a password! */
1576 _pam_log(pamh, ctrl, LOG_DEBUG,
1577 "pam_get_item returned a password");
1579 } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
1580 return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
1581 } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
1582 && off(WINBIND__OLD_PASSWORD, ctrl)) {
1583 return PAM_AUTHTOK_RECOVER_ERR;
1587 * getting here implies we will have to get the password from the
1592 struct pam_message msg[3], *pmsg[3];
1593 struct pam_response *resp;
1596 /* prepare to converse */
1598 if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
1600 msg[0].msg_style = PAM_TEXT_INFO;
1601 msg[0].msg = discard_const_p(char, comment);
1608 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
1609 msg[i++].msg = discard_const_p(char, prompt1);
1612 if (prompt2 != NULL) {
1614 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
1615 msg[i++].msg = discard_const_p(char, prompt2);
1618 /* so call the conversation expecting i responses */
1620 retval = converse(pamh, i, pmsg, &resp);
1622 if (retval == PAM_SUCCESS) {
1623 retval = PAM_AUTHTOK_RECOVER_ERR;
1627 if (retval != PAM_SUCCESS) {
1628 _pam_drop_reply(resp, i);
1632 /* interpret the response */
1634 token = x_strdup(resp[i - replies].resp);
1636 _pam_log(pamh, ctrl, LOG_NOTICE,
1637 "could not recover "
1638 "authentication token");
1639 retval = PAM_AUTHTOK_RECOVER_ERR;
1644 /* verify that password entered correctly */
1645 if (!resp[i - 1].resp ||
1646 strcmp(token, resp[i - 1].resp)) {
1647 _pam_delete(token); /* mistyped */
1648 retval = PAM_AUTHTOK_RECOVER_ERR;
1649 _make_remark(pamh, ctrl, PAM_ERROR_MSG,
1655 * tidy up the conversation (resp_retcode) is ignored
1656 * -- what is it for anyway? AGM
1658 _pam_drop_reply(resp, i);
1662 if (retval != PAM_SUCCESS) {
1663 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
1664 "unable to obtain a password");
1667 /* 'token' is the entered password */
1669 /* we store this password as an item */
1671 retval = pam_set_item(pamh, authtok_flag, token);
1672 _pam_delete(token); /* clean it up */
1673 if (retval != PAM_SUCCESS ||
1674 (retval = _pam_get_item(pamh, authtok_flag, &item)) != PAM_SUCCESS) {
1676 _pam_log(pamh, ctrl, LOG_CRIT, "error manipulating password");
1682 item = NULL; /* break link to password */
1687 const char *get_conf_item_string(const pam_handle_t *pamh,
1696 const char *parm_opt = NULL;
1698 if (!(ctrl & config_flag)) {
1702 /* let the pam opt take precedence over the pam_winbind.conf option */
1703 for (i=0; i<argc; i++) {
1705 if ((strncmp(argv[i], item, strlen(item)) == 0)) {
1708 if ((p = strchr(argv[i], '=')) == NULL) {
1709 _pam_log(pamh, ctrl, LOG_INFO,
1710 "no \"=\" delimiter for \"%s\" found\n",
1714 _pam_log_debug(pamh, ctrl, LOG_INFO,
1715 "PAM config: %s '%s'\n", item, p+1);
1723 if (!asprintf(&key, "global:%s", item)) {
1727 parm_opt = iniparser_getstr(d, key);
1730 _pam_log_debug(pamh, ctrl, LOG_INFO, "CONFIG file: %s '%s'\n",
1737 int get_config_item_int(const pam_handle_t *pamh,
1745 int i, parm_opt = -1;
1747 if (!(ctrl & config_flag)) {
1751 /* let the pam opt take precedence over the pam_winbind.conf option */
1752 for (i = 0; i < argc; i++) {
1754 if ((strncmp(argv[i], item, strlen(item)) == 0)) {
1757 if ((p = strchr(argv[i], '=')) == NULL) {
1758 _pam_log(pamh, ctrl, LOG_INFO,
1759 "no \"=\" delimiter for \"%s\" found\n",
1763 parm_opt = atoi(p + 1);
1764 _pam_log_debug(pamh, ctrl, LOG_INFO,
1765 "PAM config: %s '%d'\n",
1774 if (!asprintf(&key, "global:%s", item)) {
1778 parm_opt = iniparser_getint(d, key, -1);
1781 _pam_log_debug(pamh, ctrl, LOG_INFO,
1782 "CONFIG file: %s '%d'\n",
1789 const char *get_krb5_cc_type_from_config(const pam_handle_t *pamh,
1795 return get_conf_item_string(pamh, argc, argv, ctrl, d,
1797 WINBIND_KRB5_CCACHE_TYPE);
1800 const char *get_member_from_config(const pam_handle_t *pamh,
1806 const char *ret = NULL;
1807 ret = get_conf_item_string(pamh, argc, argv, ctrl, d,
1808 "require_membership_of",
1809 WINBIND_REQUIRED_MEMBERSHIP);
1813 return get_conf_item_string(pamh, argc, argv, ctrl, d,
1814 "require-membership-of",
1815 WINBIND_REQUIRED_MEMBERSHIP);
1818 int get_warn_pwd_expire_from_config(const pam_handle_t *pamh,
1825 ret = get_config_item_int(pamh, argc, argv, ctrl, d,
1827 WINBIND_WARN_PWD_EXPIRE);
1828 /* no or broken setting */
1830 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
1836 * Retrieve the winbind separator.
1838 * @param pamh PAM handle
1839 * @param ctrl PAM winbind options.
1841 * @return string separator character. NULL on failure.
1844 static char winbind_get_separator(pam_handle_t *pamh,
1847 struct winbindd_request request;
1848 struct winbindd_response response;
1850 ZERO_STRUCT(request);
1851 ZERO_STRUCT(response);
1853 if (pam_winbind_request_log(pamh, ctrl, WINBINDD_INFO,
1854 &request, &response, NULL)) {
1858 return response.data.info.winbind_separator;
1862 * Convert a upn to a name.
1864 * @param pamh PAM handle
1865 * @param ctrl PAM winbind options.
1866 * @param upn USer UPN to be trabslated.
1868 * @return converted name. NULL pointer on failure. Caller needs to free.
1871 static char* winbind_upn_to_username(pam_handle_t *pamh,
1875 struct winbindd_request req;
1876 struct winbindd_response resp;
1879 int account_name_len;
1882 /* This cannot work when the winbind separator = @ */
1884 sep = winbind_get_separator(pamh, ctrl);
1885 if (!sep || sep == '@') {
1889 /* Convert the UPN to a SID */
1894 strncpy(req.data.name.dom_name, "",
1895 sizeof(req.data.name.dom_name) - 1);
1896 strncpy(req.data.name.name, upn,
1897 sizeof(req.data.name.name) - 1);
1898 retval = pam_winbind_request_log(pamh, ctrl, WINBINDD_LOOKUPNAME,
1900 if (retval != PAM_SUCCESS) {
1904 /* Convert the the SID back to the sAMAccountName */
1907 strncpy(req.data.sid, resp.data.sid.sid, sizeof(req.data.sid)-1);
1909 retval = pam_winbind_request_log(pamh, ctrl, WINBINDD_LOOKUPSID,
1911 if (retval != PAM_SUCCESS) {
1915 account_name_len = asprintf(&account_name, "%s\\%s",
1916 resp.data.name.dom_name,
1917 resp.data.name.name);
1919 return account_name;
1923 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
1924 int argc, const char **argv)
1926 const char *username;
1927 const char *password;
1928 const char *member = NULL;
1929 const char *cctype = NULL;
1930 int warn_pwd_expire;
1931 int retval = PAM_AUTH_ERR;
1932 dictionary *d = NULL;
1933 char *username_ret = NULL;
1934 char *new_authtok_required = NULL;
1935 char *real_username = NULL;
1937 /* parse arguments */
1938 int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
1940 retval = PAM_SYSTEM_ERR;
1944 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", pamh, ctrl, flags);
1946 /* Get the username */
1947 retval = pam_get_user(pamh, &username, NULL);
1948 if ((retval != PAM_SUCCESS) || (!username)) {
1949 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
1950 "can not get the username");
1951 retval = PAM_SERVICE_ERR;
1957 /* Decode the user name since AIX does not support logn user
1958 names by default. The name is encoded as _#uid. */
1960 if (username[0] == '_') {
1961 uid_t id = atoi(&username[1]);
1962 struct passwd *pw = NULL;
1964 if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
1965 real_username = strdup(pw->pw_name);
1970 if (!real_username) {
1971 /* Just making a copy of the username we got from PAM */
1972 if ((real_username = strdup(username)) == NULL) {
1973 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
1974 "memory allocation failure when copying "
1976 retval = PAM_SERVICE_ERR;
1981 /* Maybe this was a UPN */
1983 if (strchr(real_username, '@') != NULL) {
1984 char *samaccountname = NULL;
1986 samaccountname = winbind_upn_to_username(pamh, ctrl,
1988 if (samaccountname) {
1989 free(real_username);
1990 real_username = samaccountname;
1994 retval = _winbind_read_password(pamh, ctrl, NULL,
1998 if (retval != PAM_SUCCESS) {
1999 _pam_log(pamh, ctrl, LOG_ERR,
2000 "Could not retrieve user's password");
2001 retval = PAM_AUTHTOK_ERR;
2005 /* Let's not give too much away in the log file */
2007 #ifdef DEBUG_PASSWORD
2008 _pam_log_debug(pamh, ctrl, LOG_INFO,
2009 "Verify user '%s' with password '%s'",
2010 real_username, password);
2012 _pam_log_debug(pamh, ctrl, LOG_INFO,
2013 "Verify user '%s'", real_username);
2016 member = get_member_from_config(pamh, argc, argv, ctrl, d);
2018 cctype = get_krb5_cc_type_from_config(pamh, argc, argv, ctrl, d);
2020 warn_pwd_expire = get_warn_pwd_expire_from_config(pamh, argc, argv,
2023 /* Now use the username to look up password */
2024 retval = winbind_auth_request(pamh, ctrl, real_username, password,
2025 member, cctype, warn_pwd_expire, NULL,
2026 NULL, &username_ret);
2028 if (retval == PAM_NEW_AUTHTOK_REQD ||
2029 retval == PAM_AUTHTOK_EXPIRED) {
2031 char *new_authtok_required_during_auth = NULL;
2033 if (!asprintf(&new_authtok_required, "%d", retval)) {
2034 retval = PAM_BUF_ERR;
2038 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2039 new_authtok_required,
2040 _pam_winbind_cleanup_func);
2042 retval = PAM_SUCCESS;
2044 if (!asprintf(&new_authtok_required_during_auth, "%d", true)) {
2045 retval = PAM_BUF_ERR;
2049 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2050 new_authtok_required_during_auth,
2051 _pam_winbind_cleanup_func);
2058 pam_set_item (pamh, PAM_USER, username_ret);
2059 _pam_log_debug(pamh, ctrl, LOG_INFO,
2060 "Returned user was '%s'", username_ret);
2064 if (real_username) {
2065 free(real_username);
2069 iniparser_freedict(d);
2072 if (!new_authtok_required) {
2073 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2076 if (retval != PAM_SUCCESS) {
2077 _pam_free_data_info3(pamh);
2080 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", pamh, ctrl, retval);
2086 int pam_sm_setcred(pam_handle_t *pamh, int flags,
2087 int argc, const char **argv)
2089 int ret = PAM_SYSTEM_ERR;
2090 dictionary *d = NULL;
2092 /* parse arguments */
2093 int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
2095 ret = PAM_SYSTEM_ERR;
2099 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", pamh, ctrl, flags);
2101 switch (flags & ~PAM_SILENT) {
2103 case PAM_DELETE_CRED:
2104 ret = pam_sm_close_session(pamh, flags, argc, argv);
2106 case PAM_REFRESH_CRED:
2107 _pam_log_debug(pamh, ctrl, LOG_WARNING,
2108 "PAM_REFRESH_CRED not implemented");
2111 case PAM_REINITIALIZE_CRED:
2112 _pam_log_debug(pamh, ctrl, LOG_WARNING,
2113 "PAM_REINITIALIZE_CRED not implemented");
2116 case PAM_ESTABLISH_CRED:
2117 _pam_log_debug(pamh, ctrl, LOG_WARNING,
2118 "PAM_ESTABLISH_CRED not implemented");
2122 ret = PAM_SYSTEM_ERR;
2128 iniparser_freedict(d);
2131 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", pamh, ctrl, ret);
2137 * Account management. We want to verify that the account exists
2138 * before returning PAM_SUCCESS
2141 int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2142 int argc, const char **argv)
2144 const char *username;
2145 int ret = PAM_USER_UNKNOWN;
2147 dictionary *d = NULL;
2149 /* parse arguments */
2150 int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
2152 return PAM_SYSTEM_ERR;
2155 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", pamh, ctrl, flags);
2158 /* Get the username */
2159 ret = pam_get_user(pamh, &username, NULL);
2160 if ((ret != PAM_SUCCESS) || (!username)) {
2161 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
2162 "can not get the username");
2163 ret = PAM_SERVICE_ERR;
2167 /* Verify the username */
2168 ret = valid_user(pamh, ctrl, username);
2171 /* some sort of system error. The log was already printed */
2172 ret = PAM_SERVICE_ERR;
2175 /* the user does not exist */
2176 _pam_log_debug(pamh, ctrl, LOG_NOTICE, "user '%s' not found",
2178 if (ctrl & WINBIND_UNKNOWN_OK_ARG) {
2182 ret = PAM_USER_UNKNOWN;
2185 pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2186 (const void **)&tmp);
2188 ret = atoi((const char *)tmp);
2190 case PAM_AUTHTOK_EXPIRED:
2191 /* fall through, since new token is required in this case */
2192 case PAM_NEW_AUTHTOK_REQD:
2193 _pam_log(pamh, ctrl, LOG_WARNING,
2194 "pam_sm_acct_mgmt success but %s is set",
2195 PAM_WINBIND_NEW_AUTHTOK_REQD);
2196 _pam_log(pamh, ctrl, LOG_NOTICE,
2197 "user '%s' needs new password",
2199 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2200 ret = PAM_NEW_AUTHTOK_REQD;
2203 _pam_log(pamh, ctrl, LOG_WARNING,
2204 "pam_sm_acct_mgmt success");
2205 _pam_log(pamh, ctrl, LOG_NOTICE,
2206 "user '%s' granted access", username);
2212 /* Otherwise, the authentication looked good */
2213 _pam_log(pamh, ctrl, LOG_NOTICE,
2214 "user '%s' granted access", username);
2218 /* we don't know anything about this return value */
2219 _pam_log(pamh, ctrl, LOG_ERR,
2220 "internal module error (ret = %d, user = '%s')",
2222 ret = PAM_SERVICE_ERR;
2226 /* should not be reached */
2232 iniparser_freedict(d);
2235 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", pamh, ctrl, ret);
2241 int pam_sm_open_session(pam_handle_t *pamh, int flags,
2242 int argc, const char **argv)
2244 int ret = PAM_SYSTEM_ERR;
2245 dictionary *d = NULL;
2247 /* parse arguments */
2248 int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
2250 ret = PAM_SYSTEM_ERR;
2254 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", pamh, ctrl, flags);
2260 iniparser_freedict(d);
2263 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", pamh, ctrl, ret);
2269 int pam_sm_close_session(pam_handle_t *pamh, int flags,
2270 int argc, const char **argv)
2272 dictionary *d = NULL;
2273 int retval = PAM_SUCCESS;
2275 /* parse arguments */
2276 int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
2278 retval = PAM_SYSTEM_ERR;
2282 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", pamh, ctrl, flags);
2284 if (!(flags & PAM_DELETE_CRED)) {
2285 retval = PAM_SUCCESS;
2289 if (ctrl & WINBIND_KRB5_AUTH) {
2291 /* destroy the ccache here */
2292 struct winbindd_request request;
2293 struct winbindd_response response;
2295 const char *ccname = NULL;
2296 struct passwd *pwd = NULL;
2298 ZERO_STRUCT(request);
2299 ZERO_STRUCT(response);
2301 retval = pam_get_user(pamh, &user, "Username: ");
2303 _pam_log(pamh, ctrl, LOG_ERR,
2304 "could not identify user");
2309 _pam_log(pamh, ctrl, LOG_ERR,
2310 "username was NULL!");
2311 retval = PAM_USER_UNKNOWN;
2315 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
2316 "username [%s] obtained", user);
2318 ccname = pam_getenv(pamh, "KRB5CCNAME");
2319 if (ccname == NULL) {
2320 _pam_log_debug(pamh, ctrl, LOG_DEBUG,
2321 "user has no KRB5CCNAME environment");
2324 strncpy(request.data.logoff.user, user,
2325 sizeof(request.data.logoff.user) - 1);
2328 strncpy(request.data.logoff.krb5ccname, ccname,
2329 sizeof(request.data.logoff.krb5ccname) - 1);
2332 pwd = getpwnam(user);
2334 retval = PAM_USER_UNKNOWN;
2337 request.data.logoff.uid = pwd->pw_uid;
2339 request.flags = WBFLAG_PAM_KRB5 |
2340 WBFLAG_PAM_CONTACT_TRUSTDOM;
2342 retval = pam_winbind_request_log(pamh, ctrl,
2343 WINBINDD_PAM_LOGOFF,
2344 &request, &response, user);
2349 iniparser_freedict(d);
2352 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", pamh, ctrl, retval);
2358 * evaluate whether we need to re-authenticate with kerberos after a
2361 * @param pamh PAM handle
2362 * @param ctrl PAM winbind options.
2363 * @param user The username
2365 * @return boolean Returns true if required, false if not.
2368 static bool _pam_require_krb5_auth_after_chauthtok(pam_handle_t *pamh,
2373 /* Make sure that we only do this if a) the chauthtok got initiated
2374 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2375 * later password change via the "passwd" command if done by the user
2378 char *new_authtok_reqd_during_auth = NULL;
2379 struct passwd *pwd = NULL;
2381 if (!(ctrl & WINBIND_KRB5_AUTH)) {
2385 _pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2386 &new_authtok_reqd_during_auth);
2387 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2390 if (new_authtok_reqd_during_auth) {
2394 pwd = getpwnam(user);
2399 if (getuid() == pwd->pw_uid) {
2408 int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
2409 int argc, const char **argv)
2415 /* <DO NOT free() THESE> */
2417 char *pass_old, *pass_new;
2418 /* </DO NOT free() THESE> */
2423 dictionary *d = NULL;
2424 char *username_ret = NULL;
2425 struct winbindd_response response;
2427 ZERO_STRUCT(response);
2429 ctrl = _pam_parse(pamh, flags, argc, argv, &d);
2431 ret = PAM_SYSTEM_ERR;
2435 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", pamh, ctrl, flags);
2437 /* clearing offline bit for the auth in the password change */
2438 ctrl &= ~WINBIND_CACHED_LOGIN;
2441 * First get the name of a user
2443 ret = pam_get_user(pamh, &user, "Username: ");
2445 _pam_log(pamh, ctrl, LOG_ERR,
2446 "password - could not identify user");
2451 _pam_log(pamh, ctrl, LOG_ERR, "username was NULL!");
2452 ret = PAM_USER_UNKNOWN;
2456 _pam_log_debug(pamh, ctrl, LOG_DEBUG, "username [%s] obtained", user);
2458 /* check if this is really a user in winbindd, not only in NSS */
2459 ret = valid_user(pamh, ctrl, user);
2462 ret = PAM_USER_UNKNOWN;
2465 ret = PAM_SYSTEM_ERR;
2472 * obtain and verify the current password (OLDAUTHTOK) for
2476 if (flags & PAM_PRELIM_CHECK) {
2477 time_t pwdlastset_prelim = 0;
2479 /* instruct user what is happening */
2480 #define greeting "Changing password for "
2481 Announce = (char *) malloc(sizeof(greeting) + strlen(user));
2482 if (Announce == NULL) {
2483 _pam_log(pamh, ctrl, LOG_CRIT,
2484 "password - out of memory");
2488 (void) strcpy(Announce, greeting);
2489 (void) strcpy(Announce + sizeof(greeting) - 1, user);
2492 lctrl = ctrl | WINBIND__OLD_PASSWORD;
2493 ret = _winbind_read_password(pamh, lctrl,
2495 "(current) NT password: ",
2497 (const char **) &pass_old);
2498 if (ret != PAM_SUCCESS) {
2499 _pam_log(pamh, ctrl, LOG_NOTICE,
2500 "password - (old) token not obtained");
2504 /* verify that this is the password for this user */
2506 ret = winbind_auth_request(pamh, ctrl, user, pass_old,
2507 NULL, NULL, 0, &response,
2508 &pwdlastset_prelim, NULL);
2510 if (ret != PAM_ACCT_EXPIRED &&
2511 ret != PAM_AUTHTOK_EXPIRED &&
2512 ret != PAM_NEW_AUTHTOK_REQD &&
2513 ret != PAM_SUCCESS) {
2518 pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
2519 (void *)pwdlastset_prelim, NULL);
2521 ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
2522 (const void *) pass_old);
2524 if (ret != PAM_SUCCESS) {
2525 _pam_log(pamh, ctrl, LOG_CRIT,
2526 "failed to set PAM_OLDAUTHTOK");
2528 } else if (flags & PAM_UPDATE_AUTHTOK) {
2530 time_t pwdlastset_update = 0;
2533 * obtain the proposed password
2537 * get the old token back.
2540 ret = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
2542 if (ret != PAM_SUCCESS) {
2543 _pam_log(pamh, ctrl, LOG_NOTICE,
2544 "user not authenticated");
2548 lctrl = ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
2550 if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
2551 lctrl |= WINBIND_USE_FIRST_PASS_ARG;
2554 ret = PAM_AUTHTOK_ERR;
2555 while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
2557 * use_authtok is to force the use of a previously entered
2558 * password -- needed for pluggable password strength checking
2561 ret = _winbind_read_password(pamh, lctrl,
2563 "Enter new NT password: ",
2564 "Retype new NT password: ",
2565 (const char **)&pass_new);
2567 if (ret != PAM_SUCCESS) {
2568 _pam_log_debug(pamh, ctrl, LOG_ALERT,
2570 "new password not obtained");
2571 pass_old = NULL;/* tidy up */
2576 * At this point we know who the user is and what they
2577 * propose as their new password. Verify that the new
2578 * password is acceptable.
2581 if (pass_new[0] == '\0') {/* "\0" password = NULL */
2587 * By reaching here we have approved the passwords and must now
2588 * rebuild the password database file.
2590 _pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
2591 &pwdlastset_update);
2593 ret = winbind_chauthtok_request(pamh, ctrl, user, pass_old,
2594 pass_new, pwdlastset_update);
2596 _pam_overwrite(pass_new);
2597 _pam_overwrite(pass_old);
2598 pass_old = pass_new = NULL;
2602 if (_pam_require_krb5_auth_after_chauthtok(pamh, ctrl, user)) {
2604 const char *member = NULL;
2605 const char *cctype = NULL;
2606 int warn_pwd_expire;
2608 member = get_member_from_config(pamh, argc, argv,
2610 cctype = get_krb5_cc_type_from_config(pamh, argc, argv,
2612 warn_pwd_expire = get_warn_pwd_expire_from_config(pamh,
2619 ret = winbind_auth_request(pamh, ctrl, user, pass_new,
2620 member, cctype, 0, &response,
2621 NULL, &username_ret);
2622 _pam_overwrite(pass_new);
2623 _pam_overwrite(pass_old);
2624 pass_old = pass_new = NULL;
2626 if (ret == PAM_SUCCESS) {
2628 /* warn a user if the password is about to
2630 _pam_warn_password_expiry(pamh, ctrl, &response,
2634 /* set some info3 info for other modules in the
2636 _pam_set_data_info3(pamh, ctrl, &response);
2638 /* put krb5ccname into env */
2639 _pam_setup_krb5_env(pamh, ctrl,
2640 response.data.auth.krb5ccname);
2643 pam_set_item(pamh, PAM_USER,
2645 _pam_log_debug(pamh, ctrl, LOG_INFO,
2646 "Returned user was '%s'",
2655 ret = PAM_SERVICE_ERR;
2660 iniparser_freedict(d);
2663 /* Deal with offline errors. */
2664 PAM_WB_REMARK_CHECK_RESPONSE(pamh, ctrl, response,
2665 "NT_STATUS_NO_LOGON_SERVERS");
2666 PAM_WB_REMARK_CHECK_RESPONSE(pamh, ctrl, response,
2667 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
2668 PAM_WB_REMARK_CHECK_RESPONSE(pamh, ctrl, response,
2669 "NT_STATUS_ACCESS_DENIED");
2671 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", pamh, ctrl, ret);
2678 /* static module data */
2680 struct pam_module _pam_winbind_modstruct = {
2682 pam_sm_authenticate,
2685 pam_sm_open_session,
2686 pam_sm_close_session,
2693 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
2694 * Copyright (c) Tim Potter <tpot@samba.org> 2000
2695 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
2696 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2007
2697 * Copyright (c) Jan Rêkorajski 1999.
2698 * Copyright (c) Andrew G. Morgan 1996-8.
2699 * Copyright (c) Alex O. Yuriev, 1996.
2700 * Copyright (c) Cristian Gafton 1996.
2701 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
2703 * Redistribution and use in source and binary forms, with or without
2704 * modification, are permitted provided that the following conditions
2706 * 1. Redistributions of source code must retain the above copyright
2707 * notice, and the entire permission notice in its entirety,
2708 * including the disclaimer of warranties.
2709 * 2. Redistributions in binary form must reproduce the above copyright
2710 * notice, this list of conditions and the following disclaimer in the
2711 * documentation and/or other materials provided with the distribution.
2712 * 3. The name of the author may not be used to endorse or promote
2713 * products derived from this software without specific prior
2714 * written permission.
2716 * ALTERNATIVELY, this product may be distributed under the terms of
2717 * the GNU Public License, in which case the provisions of the GPL are
2718 * required INSTEAD OF the above restrictions. (This clause is
2719 * necessary due to a potential bad interaction between the GPL and
2720 * the restrictions contained in a BSD-style copyright.)
2722 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
2723 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
2724 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
2725 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
2726 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
2727 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
2728 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2729 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
2730 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
2731 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
2732 * OF THE POSSIBILITY OF SUCH DAMAGE.