3 Copyright Andrew Tridgell <tridge@samba.org> 2000
4 Copyright Tim Potter <tpot@samba.org> 2000
5 Copyright Andrew Bartlett <abartlet@samba.org> 2002
6 Copyright Guenther Deschner <gd@samba.org> 2005-2008
8 largely based on pam_userdb by Cristian Gafton <gafton@redhat.com> also
9 contains large slabs of code from pam_unix by Elliot Lee
10 <sopwith@redhat.com> (see copyright below for full details)
13 #include "pam_winbind.h"
14 #define CONST_DISCARD(type,ptr) ((type)(void *)ptr)
17 static int wbc_error_to_pam_error(wbcErr status)
22 case WBC_ERR_NOT_IMPLEMENTED:
23 return PAM_SERVICE_ERR;
24 case WBC_ERR_UNKNOWN_FAILURE:
26 case WBC_ERR_NO_MEMORY:
28 case WBC_ERR_INVALID_SID:
29 case WBC_ERR_INVALID_PARAM:
31 case WBC_ERR_WINBIND_NOT_AVAILABLE:
32 return PAM_AUTHINFO_UNAVAIL;
33 case WBC_ERR_DOMAIN_NOT_FOUND:
34 return PAM_AUTHINFO_UNAVAIL;
35 case WBC_ERR_INVALID_RESPONSE:
37 case WBC_ERR_NSS_ERROR:
38 return PAM_USER_UNKNOWN;
39 case WBC_ERR_AUTH_ERROR:
41 case WBC_ERR_UNKNOWN_USER:
42 return PAM_USER_UNKNOWN;
43 case WBC_ERR_UNKNOWN_GROUP:
44 return PAM_USER_UNKNOWN;
45 case WBC_ERR_PWD_CHANGE_FAILED:
53 static const char *_pam_error_code_str(int err)
59 return "PAM_OPEN_ERR";
61 return "PAM_SYMBOL_ERR";
63 return "PAM_SERVICE_ERR";
65 return "PAM_SYSTEM_ERR";
69 return "PAM_PERM_DENIED";
71 return "PAM_AUTH_ERR";
72 case PAM_CRED_INSUFFICIENT:
73 return "PAM_CRED_INSUFFICIENT";
74 case PAM_AUTHINFO_UNAVAIL:
75 return "PAM_AUTHINFO_UNAVAIL";
76 case PAM_USER_UNKNOWN:
77 return "PAM_USER_UNKNOWN";
79 return "PAM_MAXTRIES";
80 case PAM_NEW_AUTHTOK_REQD:
81 return "PAM_NEW_AUTHTOK_REQD";
82 case PAM_ACCT_EXPIRED:
83 return "PAM_ACCT_EXPIRED";
85 return "PAM_SESSION_ERR";
86 case PAM_CRED_UNAVAIL:
87 return "PAM_CRED_UNAVAIL";
88 case PAM_CRED_EXPIRED:
89 return "PAM_CRED_EXPIRED";
91 return "PAM_CRED_ERR";
92 case PAM_NO_MODULE_DATA:
93 return "PAM_NO_MODULE_DATA";
95 return "PAM_CONV_ERR";
97 return "PAM_AUTHTOK_ERR";
98 case PAM_AUTHTOK_RECOVER_ERR:
99 return "PAM_AUTHTOK_RECOVER_ERR";
100 case PAM_AUTHTOK_LOCK_BUSY:
101 return "PAM_AUTHTOK_LOCK_BUSY";
102 case PAM_AUTHTOK_DISABLE_AGING:
103 return "PAM_AUTHTOK_DISABLE_AGING";
105 return "PAM_TRY_AGAIN";
110 case PAM_AUTHTOK_EXPIRED:
111 return "PAM_AUTHTOK_EXPIRED";
112 #ifdef PAM_MODULE_UNKNOWN
113 case PAM_MODULE_UNKNOWN:
114 return "PAM_MODULE_UNKNOWN";
118 return "PAM_BAD_ITEM";
120 #ifdef PAM_CONV_AGAIN
122 return "PAM_CONV_AGAIN";
124 #ifdef PAM_INCOMPLETE
126 return "PAM_INCOMPLETE";
133 #define _PAM_LOG_FUNCTION_ENTER(function, ctx) \
135 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] ENTER: " \
136 function " (flags: 0x%04x)", ctx->pamh, ctx->flags); \
137 _pam_log_state(ctx); \
140 #define _PAM_LOG_FUNCTION_LEAVE(function, ctx, retval) \
142 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] LEAVE: " \
143 function " returning %d (%s)", ctx->pamh, retval, \
144 _pam_error_code_str(retval)); \
145 _pam_log_state(ctx); \
150 #define MAX_PASSWD_TRIES 3
153 static char initialized = 0;
155 static inline void textdomain_init(void);
156 static inline void textdomain_init(void)
159 bindtextdomain(MODULE_NAME, dyn_LOCALEDIR);
168 * Work around the pam API that has functions with void ** as parameters
169 * These lead to strict aliasing warnings with gcc.
171 static int _pam_get_item(const pam_handle_t *pamh,
175 const void **item = (const void **)_item;
176 return pam_get_item(pamh, item_type, item);
178 static int _pam_get_data(const pam_handle_t *pamh,
179 const char *module_data_name,
182 const void **data = (const void **)_data;
183 return pam_get_data(pamh, module_data_name, data);
186 /* some syslogging */
188 #ifdef HAVE_PAM_VSYSLOG
189 static void _pam_log_int(const pam_handle_t *pamh,
194 pam_vsyslog(pamh, err, format, args);
197 static void _pam_log_int(const pam_handle_t *pamh,
202 char *format2 = NULL;
205 _pam_get_item(pamh, PAM_SERVICE, &service);
207 format2 = (char *)malloc(strlen(MODULE_NAME)+strlen(format)+strlen(service)+5);
208 if (format2 == NULL) {
209 /* what else todo ? */
210 vsyslog(err, format, args);
214 sprintf(format2, "%s(%s): %s", MODULE_NAME, service, format);
215 vsyslog(err, format2, args);
218 #endif /* HAVE_PAM_VSYSLOG */
220 static bool _pam_log_is_silent(int ctrl)
222 return on(ctrl, WINBIND_SILENT);
225 static void _pam_log(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
226 static void _pam_log(struct pwb_context *r, int err, const char *format, ...)
230 if (_pam_log_is_silent(r->ctrl)) {
234 va_start(args, format);
235 _pam_log_int(r->pamh, err, format, args);
238 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
239 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
243 if (_pam_log_is_silent(ctrl)) {
247 va_start(args, format);
248 _pam_log_int(pamh, err, format, args);
252 static bool _pam_log_is_debug_enabled(int ctrl)
258 if (_pam_log_is_silent(ctrl)) {
262 if (!(ctrl & WINBIND_DEBUG_ARG)) {
269 static bool _pam_log_is_debug_state_enabled(int ctrl)
271 if (!(ctrl & WINBIND_DEBUG_STATE)) {
275 return _pam_log_is_debug_enabled(ctrl);
278 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
279 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...)
283 if (!_pam_log_is_debug_enabled(r->ctrl)) {
287 va_start(args, format);
288 _pam_log_int(r->pamh, err, format, args);
291 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
292 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
296 if (!_pam_log_is_debug_enabled(ctrl)) {
300 va_start(args, format);
301 _pam_log_int(pamh, err, format, args);
305 static void _pam_log_state_datum(struct pwb_context *ctx,
310 const void *data = NULL;
311 if (item_type != 0) {
312 pam_get_item(ctx->pamh, item_type, &data);
314 pam_get_data(ctx->pamh, key, &data);
317 const char *type = (item_type != 0) ? "ITEM" : "DATA";
318 if (is_string != 0) {
319 _pam_log_debug(ctx, LOG_DEBUG,
320 "[pamh: %p] STATE: %s(%s) = \"%s\" (%p)",
321 ctx->pamh, type, key, (const char *)data,
324 _pam_log_debug(ctx, LOG_DEBUG,
325 "[pamh: %p] STATE: %s(%s) = %p",
326 ctx->pamh, type, key, data);
331 #define _PAM_LOG_STATE_DATA_POINTER(ctx, module_data_name) \
332 _pam_log_state_datum(ctx, 0, module_data_name, 0)
334 #define _PAM_LOG_STATE_DATA_STRING(ctx, module_data_name) \
335 _pam_log_state_datum(ctx, 0, module_data_name, 1)
337 #define _PAM_LOG_STATE_ITEM_POINTER(ctx, item_type) \
338 _pam_log_state_datum(ctx, item_type, #item_type, 0)
340 #define _PAM_LOG_STATE_ITEM_STRING(ctx, item_type) \
341 _pam_log_state_datum(ctx, item_type, #item_type, 1)
343 #ifdef DEBUG_PASSWORD
344 #define _LOG_PASSWORD_AS_STRING 1
346 #define _LOG_PASSWORD_AS_STRING 0
349 #define _PAM_LOG_STATE_ITEM_PASSWORD(ctx, item_type) \
350 _pam_log_state_datum(ctx, item_type, #item_type, \
351 _LOG_PASSWORD_AS_STRING)
353 static void _pam_log_state(struct pwb_context *ctx)
355 if (!_pam_log_is_debug_state_enabled(ctx->ctrl)) {
359 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_SERVICE);
360 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER);
361 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_TTY);
362 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RHOST);
363 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RUSER);
364 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_OLDAUTHTOK);
365 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_AUTHTOK);
366 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER_PROMPT);
367 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_CONV);
368 #ifdef PAM_FAIL_DELAY
369 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_FAIL_DELAY);
371 #ifdef PAM_REPOSITORY
372 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_REPOSITORY);
375 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_HOMEDIR);
376 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSCRIPT);
377 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSERVER);
378 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_PROFILEPATH);
379 _PAM_LOG_STATE_DATA_STRING(ctx,
380 PAM_WINBIND_NEW_AUTHTOK_REQD);
381 /* Use atoi to get PAM result code */
382 _PAM_LOG_STATE_DATA_STRING(ctx,
383 PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
384 _PAM_LOG_STATE_DATA_POINTER(ctx, PAM_WINBIND_PWD_LAST_SET);
387 static int _pam_parse(const pam_handle_t *pamh,
391 dictionary **result_d)
394 const char *config_file = NULL;
397 dictionary *d = NULL;
399 if (flags & PAM_SILENT) {
400 ctrl |= WINBIND_SILENT;
403 for (i=argc,v=argv; i-- > 0; ++v) {
404 if (!strncasecmp(*v, "config", strlen("config"))) {
405 ctrl |= WINBIND_CONFIG_FILE;
411 if (config_file == NULL) {
412 config_file = PAM_WINBIND_CONFIG_FILE;
415 d = iniparser_load(CONST_DISCARD(char *, config_file));
417 goto config_from_pam;
420 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:debug"), false)) {
421 ctrl |= WINBIND_DEBUG_ARG;
424 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:debug_state"), false)) {
425 ctrl |= WINBIND_DEBUG_STATE;
428 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:cached_login"), false)) {
429 ctrl |= WINBIND_CACHED_LOGIN;
432 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:krb5_auth"), false)) {
433 ctrl |= WINBIND_KRB5_AUTH;
436 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:silent"), false)) {
437 ctrl |= WINBIND_SILENT;
440 if (iniparser_getstr(d, CONST_DISCARD(char *, "global:krb5_ccache_type")) != NULL) {
441 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
444 if ((iniparser_getstr(d, CONST_DISCARD(char *, "global:require-membership-of"))
446 (iniparser_getstr(d, CONST_DISCARD(char *, "global:require_membership_of"))
448 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
451 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:try_first_pass"), false)) {
452 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
455 if (iniparser_getint(d, CONST_DISCARD(char *, "global:warn_pwd_expire"), 0)) {
456 ctrl |= WINBIND_WARN_PWD_EXPIRE;
459 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:mkhomedir"), false)) {
460 ctrl |= WINBIND_MKHOMEDIR;
464 /* step through arguments */
465 for (i=argc,v=argv; i-- > 0; ++v) {
467 /* generic options */
468 if (!strcmp(*v,"debug"))
469 ctrl |= WINBIND_DEBUG_ARG;
470 else if (!strcasecmp(*v, "debug_state"))
471 ctrl |= WINBIND_DEBUG_STATE;
472 else if (!strcasecmp(*v, "silent"))
473 ctrl |= WINBIND_SILENT;
474 else if (!strcasecmp(*v, "use_authtok"))
475 ctrl |= WINBIND_USE_AUTHTOK_ARG;
476 else if (!strcasecmp(*v, "use_first_pass"))
477 ctrl |= WINBIND_USE_FIRST_PASS_ARG;
478 else if (!strcasecmp(*v, "try_first_pass"))
479 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
480 else if (!strcasecmp(*v, "unknown_ok"))
481 ctrl |= WINBIND_UNKNOWN_OK_ARG;
482 else if (!strncasecmp(*v, "require_membership_of",
483 strlen("require_membership_of")))
484 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
485 else if (!strncasecmp(*v, "require-membership-of",
486 strlen("require-membership-of")))
487 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
488 else if (!strcasecmp(*v, "krb5_auth"))
489 ctrl |= WINBIND_KRB5_AUTH;
490 else if (!strncasecmp(*v, "krb5_ccache_type",
491 strlen("krb5_ccache_type")))
492 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
493 else if (!strcasecmp(*v, "cached_login"))
494 ctrl |= WINBIND_CACHED_LOGIN;
495 else if (!strcasecmp(*v, "mkhomedir"))
496 ctrl |= WINBIND_MKHOMEDIR;
498 __pam_log(pamh, ctrl, LOG_ERR,
499 "pam_parse: unknown option: %s", *v);
509 iniparser_freedict(d);
516 static int _pam_winbind_free_context(struct pwb_context *ctx)
523 iniparser_freedict(ctx->dict);
529 static int _pam_winbind_init_context(pam_handle_t *pamh,
533 struct pwb_context **ctx_p)
535 struct pwb_context *r = NULL;
541 r = TALLOC_ZERO_P(NULL, struct pwb_context);
546 talloc_set_destructor(r, _pam_winbind_free_context);
552 r->ctrl = _pam_parse(pamh, flags, argc, argv, &r->dict);
555 return PAM_SYSTEM_ERR;
563 static void _pam_winbind_cleanup_func(pam_handle_t *pamh,
567 int ctrl = _pam_parse(pamh, 0, 0, NULL, NULL);
568 if (_pam_log_is_debug_state_enabled(ctrl)) {
569 __pam_log_debug(pamh, ctrl, LOG_DEBUG,
570 "[pamh: %p] CLEAN: cleaning up PAM data %p "
571 "(error_status = %d)", pamh, data,
578 static const struct ntstatus_errors {
579 const char *ntstatus_string;
580 const char *error_string;
581 } ntstatus_errors[] = {
584 {"NT_STATUS_BACKUP_CONTROLLER",
585 N_("No primary Domain Controler available")},
586 {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
587 N_("No domain controllers found")},
588 {"NT_STATUS_NO_LOGON_SERVERS",
589 N_("No logon servers")},
590 {"NT_STATUS_PWD_TOO_SHORT",
591 N_("Password too short")},
592 {"NT_STATUS_PWD_TOO_RECENT",
593 N_("The password of this user is too recent to change")},
594 {"NT_STATUS_PWD_HISTORY_CONFLICT",
595 N_("Password is already in password history")},
596 {"NT_STATUS_PASSWORD_EXPIRED",
597 N_("Your password has expired")},
598 {"NT_STATUS_PASSWORD_MUST_CHANGE",
599 N_("You need to change your password now")},
600 {"NT_STATUS_INVALID_WORKSTATION",
601 N_("You are not allowed to logon from this workstation")},
602 {"NT_STATUS_INVALID_LOGON_HOURS",
603 N_("You are not allowed to logon at this time")},
604 {"NT_STATUS_ACCOUNT_EXPIRED",
605 N_("Your account has expired. "
606 "Please contact your System administrator")}, /* SCNR */
607 {"NT_STATUS_ACCOUNT_DISABLED",
608 N_("Your account is disabled. "
609 "Please contact your System administrator")}, /* SCNR */
610 {"NT_STATUS_ACCOUNT_LOCKED_OUT",
611 N_("Your account has been locked. "
612 "Please contact your System administrator")}, /* SCNR */
613 {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
614 N_("Invalid Trust Account")},
615 {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
616 N_("Invalid Trust Account")},
617 {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
618 N_("Invalid Trust Account")},
619 {"NT_STATUS_ACCESS_DENIED",
620 N_("Access is denied")},
624 static const char *_get_ntstatus_error_string(const char *nt_status_string)
627 for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
628 if (!strcasecmp(ntstatus_errors[i].ntstatus_string,
630 return _(ntstatus_errors[i].error_string);
636 /* --- authentication management functions --- */
638 /* Attempt a conversation */
640 static int converse(const pam_handle_t *pamh,
642 struct pam_message **message,
643 struct pam_response **response)
646 struct pam_conv *conv;
648 retval = _pam_get_item(pamh, PAM_CONV, &conv);
649 if (retval == PAM_SUCCESS) {
650 retval = conv->conv(nargs,
651 (const struct pam_message **)message,
652 response, conv->appdata_ptr);
655 return retval; /* propagate error status */
659 static int _make_remark(struct pwb_context *ctx,
663 int retval = PAM_SUCCESS;
665 struct pam_message *pmsg[1], msg[1];
666 struct pam_response *resp;
668 if (ctx->flags & WINBIND_SILENT) {
673 msg[0].msg = discard_const_p(char, text);
674 msg[0].msg_style = type;
677 retval = converse(ctx->pamh, 1, pmsg, &resp);
680 _pam_drop_reply(resp, 1);
685 static int _make_remark_v(struct pwb_context *ctx,
693 ret = vasprintf(&var, format, args);
695 _pam_log(ctx, LOG_ERR, "memory allocation failure");
699 ret = _make_remark(ctx, type, var);
704 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
705 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...)
710 va_start(args, format);
711 ret = _make_remark_v(ctx, type, format, args);
716 static int pam_winbind_request_log(struct pwb_context *ctx,
723 /* incorrect password */
724 _pam_log(ctx, LOG_WARNING, "user '%s' denied access "
725 "(incorrect password or invalid membership)", user);
727 case PAM_ACCT_EXPIRED:
728 /* account expired */
729 _pam_log(ctx, LOG_WARNING, "user '%s' account expired",
732 case PAM_AUTHTOK_EXPIRED:
733 /* password expired */
734 _pam_log(ctx, LOG_WARNING, "user '%s' password expired",
737 case PAM_NEW_AUTHTOK_REQD:
738 /* new password required */
739 _pam_log(ctx, LOG_WARNING, "user '%s' new password "
742 case PAM_USER_UNKNOWN:
743 /* the user does not exist */
744 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
746 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
751 /* Otherwise, the authentication looked good */
752 if (strcmp(fn, "wbcLogonUser") == 0) {
753 _pam_log(ctx, LOG_NOTICE,
754 "user '%s' granted access", user);
756 _pam_log(ctx, LOG_NOTICE,
757 "user '%s' OK", user);
761 /* we don't know anything about this return value */
762 _pam_log(ctx, LOG_ERR,
763 "internal module error (retval = %s(%d), user = '%s')",
764 _pam_error_code_str(retval), retval, user);
769 static int wbc_auth_error_to_pam_error(struct pwb_context *ctx,
770 struct wbcAuthErrorInfo *e,
772 const char *username,
775 int ret = PAM_AUTH_ERR;
777 if (WBC_ERROR_IS_OK(status)) {
778 _pam_log_debug(ctx, LOG_DEBUG, "request %s succeeded",
781 return pam_winbind_request_log(ctx, ret, username, fn);
785 if (e->pam_error != PAM_SUCCESS) {
786 _pam_log(ctx, LOG_ERR,
787 "request %s failed: %s, "
788 "PAM error: %s (%d), NTSTATUS: %s, "
789 "Error message was: %s",
791 wbcErrorString(status),
792 _pam_error_code_str(e->pam_error),
797 return pam_winbind_request_log(ctx, ret, username, fn);
800 _pam_log(ctx, LOG_ERR, "request %s failed, but PAM error 0!", fn);
802 ret = PAM_SERVICE_ERR;
803 return pam_winbind_request_log(ctx, ret, username, fn);
806 ret = wbc_error_to_pam_error(status);
807 return pam_winbind_request_log(ctx, ret, username, fn);
812 * send a password expiry message if required
814 * @param ctx PAM winbind context.
815 * @param next_change expected (calculated) next expiry date.
816 * @param already_expired pointer to a boolean to indicate if the password is
819 * @return boolean Returns true if message has been sent, false if not.
822 static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
826 bool *already_expired)
829 struct tm tm_now, tm_next_change;
831 if (already_expired) {
832 *already_expired = false;
835 if (next_change <= now) {
836 PAM_WB_REMARK_DIRECT(ctx, "NT_STATUS_PASSWORD_EXPIRED");
837 if (already_expired) {
838 *already_expired = true;
843 if ((next_change < 0) ||
844 (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
848 if ((localtime_r(&now, &tm_now) == NULL) ||
849 (localtime_r(&next_change, &tm_next_change) == NULL)) {
853 days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) -
854 (tm_now.tm_yday+tm_now.tm_year*365);
857 _make_remark(ctx, PAM_TEXT_INFO,
858 _("Your password expires today"));
862 if (days > 0 && days < warn_pwd_expire) {
863 _make_remark_format(ctx, PAM_TEXT_INFO,
864 _("Your password will expire in %d %s"),
865 days, (days > 1) ? _("days"):_("day"));
873 * Send a warning if the password expires in the near future
875 * @param ctx PAM winbind context.
876 * @param response The full authentication response structure.
877 * @param already_expired boolean, is the pwd already expired?
882 static void _pam_warn_password_expiry(struct pwb_context *ctx,
883 const struct wbcAuthUserInfo *info,
884 const struct wbcUserPasswordPolicyInfo *policy,
886 bool *already_expired)
888 time_t now = time(NULL);
889 time_t next_change = 0;
891 if (!info || !policy) {
895 if (already_expired) {
896 *already_expired = false;
899 /* accounts with WBC_ACB_PWNOEXP set never receive a warning */
900 if (info->acct_flags & WBC_ACB_PWNOEXP) {
904 /* no point in sending a warning if this is a grace logon */
905 if (PAM_WB_GRACE_LOGON(info->user_flags)) {
909 /* check if the info3 must change timestamp has been set */
910 next_change = info->pass_must_change_time;
912 if (_pam_send_password_expiry_message(ctx, next_change, now,
918 /* now check for the global password policy */
919 /* good catch from Ralf Haferkamp: an expiry of "never" is translated
921 if ((policy->expire == (int64_t)-1) ||
922 (policy->expire == 0)) {
926 next_change = info->pass_last_set_time + policy->expire;
928 if (_pam_send_password_expiry_message(ctx, next_change, now,
934 /* no warning sent */
937 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
940 * Append a string, making sure not to overflow and to always return a
941 * NULL-terminated string.
943 * @param dest Destination string buffer (must already be NULL-terminated).
944 * @param src Source string buffer.
945 * @param dest_buffer_size Size of dest buffer in bytes.
947 * @return false if dest buffer is not big enough (no bytes copied), true on
951 static bool safe_append_string(char *dest,
953 int dest_buffer_size)
955 int dest_length = strlen(dest);
956 int src_length = strlen(src);
958 if (dest_length + src_length + 1 > dest_buffer_size) {
962 memcpy(dest + dest_length, src, src_length + 1);
967 * Convert a names into a SID string, appending it to a buffer.
969 * @param ctx PAM winbind context.
970 * @param user User in PAM request.
971 * @param name Name to convert.
972 * @param sid_list_buffer Where to append the string sid.
973 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
975 * @return false on failure, true on success.
977 static bool winbind_name_to_sid_string(struct pwb_context *ctx,
980 char *sid_list_buffer,
981 int sid_list_buffer_size)
983 const char* sid_string = NULL;
984 char *sid_str = NULL;
987 if (IS_SID_STRING(name)) {
991 struct wbcDomainSid sid;
992 enum wbcSidType type;
994 _pam_log_debug(ctx, LOG_DEBUG,
995 "no sid given, looking up: %s\n", name);
997 wbc_status = wbcLookupName("", name, &sid, &type);
998 if (!WBC_ERROR_IS_OK(wbc_status)) {
999 _pam_log(ctx, LOG_INFO,
1000 "could not lookup name: %s\n", name);
1004 wbc_status = wbcSidToString(&sid, &sid_str);
1005 if (!WBC_ERROR_IS_OK(wbc_status)) {
1009 sid_string = sid_str;
1012 if (!safe_append_string(sid_list_buffer, sid_string,
1013 sid_list_buffer_size)) {
1014 wbcFreeMemory(sid_str);
1018 wbcFreeMemory(sid_str);
1023 * Convert a list of names into a list of sids.
1025 * @param ctx PAM winbind context.
1026 * @param user User in PAM request.
1027 * @param name_list List of names or string sids, separated by commas.
1028 * @param sid_list_buffer Where to put the list of string sids.
1029 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1031 * @return false on failure, true on success.
1033 static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
1035 const char *name_list,
1036 char *sid_list_buffer,
1037 int sid_list_buffer_size)
1039 bool result = false;
1040 char *current_name = NULL;
1041 const char *search_location;
1044 if (sid_list_buffer_size > 0) {
1045 sid_list_buffer[0] = 0;
1048 search_location = name_list;
1049 while ((comma = strstr(search_location, ",")) != NULL) {
1050 current_name = strndup(search_location,
1051 comma - search_location);
1052 if (NULL == current_name) {
1056 if (!winbind_name_to_sid_string(ctx, user,
1059 sid_list_buffer_size)) {
1063 SAFE_FREE(current_name);
1065 if (!safe_append_string(sid_list_buffer, ",",
1066 sid_list_buffer_size)) {
1070 search_location = comma + 1;
1073 if (!winbind_name_to_sid_string(ctx, user, search_location,
1075 sid_list_buffer_size)) {
1082 SAFE_FREE(current_name);
1087 * put krb5ccname variable into environment
1089 * @param ctx PAM winbind context.
1090 * @param krb5ccname env variable retrieved from winbindd.
1095 static void _pam_setup_krb5_env(struct pwb_context *ctx,
1096 struct wbcLogonUserInfo *info)
1101 const char *krb5ccname = NULL;
1103 if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
1111 for (i=0; i < info->num_blobs; i++) {
1112 if (strcasecmp(info->blobs[i].name, "krb5ccname") == 0) {
1113 krb5ccname = (const char *)info->blobs[i].blob.data;
1118 if (!krb5ccname || (strlen(krb5ccname) == 0)) {
1122 _pam_log_debug(ctx, LOG_DEBUG,
1123 "request returned KRB5CCNAME: %s", krb5ccname);
1125 if (snprintf(var, sizeof(var), "KRB5CCNAME=%s", krb5ccname) == -1) {
1129 ret = pam_putenv(ctx->pamh, var);
1131 _pam_log(ctx, LOG_ERR,
1132 "failed to set KRB5CCNAME to %s: %s",
1133 var, pam_strerror(ctx->pamh, ret));
1138 * Copy unix username if available (further processed in PAM).
1140 * @param ctx PAM winbind context
1141 * @param user_ret A pointer that holds a pointer to a string
1142 * @param unix_username A username
1147 static void _pam_setup_unix_username(struct pwb_context *ctx,
1149 struct wbcLogonUserInfo *info)
1151 const char *unix_username = NULL;
1154 if (!user_ret || !info) {
1158 for (i=0; i < info->num_blobs; i++) {
1159 if (strcasecmp(info->blobs[i].name, "unix_username") == 0) {
1160 unix_username = (const char *)info->blobs[i].blob.data;
1165 if (!unix_username || !unix_username[0]) {
1169 *user_ret = strdup(unix_username);
1173 * Set string into the PAM stack.
1175 * @param ctx PAM winbind context.
1176 * @param data_name Key name for pam_set_data.
1177 * @param value String value.
1182 static void _pam_set_data_string(struct pwb_context *ctx,
1183 const char *data_name,
1188 if (!data_name || !value || (strlen(data_name) == 0) ||
1189 (strlen(value) == 0)) {
1193 ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
1194 _pam_winbind_cleanup_func);
1196 _pam_log_debug(ctx, LOG_DEBUG,
1197 "Could not set data %s: %s\n",
1198 data_name, pam_strerror(ctx->pamh, ret));
1203 * Set info3 strings into the PAM stack.
1205 * @param ctx PAM winbind context.
1206 * @param data_name Key name for pam_set_data.
1207 * @param value String value.
1212 static void _pam_set_data_info3(struct pwb_context *ctx,
1213 const struct wbcAuthUserInfo *info)
1215 _pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
1216 info->home_directory);
1217 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
1218 info->logon_script);
1219 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
1220 info->logon_server);
1221 _pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
1222 info->profile_path);
1226 * Free info3 strings in the PAM stack.
1228 * @param pamh PAM handle
1233 static void _pam_free_data_info3(pam_handle_t *pamh)
1235 pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1236 pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1237 pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1238 pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1242 * Send PAM_ERROR_MSG for cached or grace logons.
1244 * @param ctx PAM winbind context.
1245 * @param username User in PAM request.
1246 * @param info3_user_flgs Info3 flags containing logon type bits.
1251 static void _pam_warn_logon_type(struct pwb_context *ctx,
1252 const char *username,
1253 uint32_t info3_user_flgs)
1255 /* inform about logon type */
1256 if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1258 _make_remark(ctx, PAM_ERROR_MSG,
1260 "Please change your password as soon you're "
1262 _pam_log_debug(ctx, LOG_DEBUG,
1263 "User %s logged on using grace logon\n",
1266 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1268 _make_remark(ctx, PAM_ERROR_MSG,
1269 _("Domain Controller unreachable, "
1270 "using cached credentials instead. "
1271 "Network resources may be unavailable"));
1272 _pam_log_debug(ctx, LOG_DEBUG,
1273 "User %s logged on using cached credentials\n",
1279 * Send PAM_ERROR_MSG for krb5 errors.
1281 * @param ctx PAM winbind context.
1282 * @param username User in PAM request.
1283 * @param info3_user_flgs Info3 flags containing logon type bits.
1288 static void _pam_warn_krb5_failure(struct pwb_context *ctx,
1289 const char *username,
1290 uint32_t info3_user_flgs)
1292 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1293 _make_remark(ctx, PAM_ERROR_MSG,
1294 _("Failed to establish your Kerberos Ticket cache "
1295 "due time differences\n"
1296 "with the domain controller. "
1297 "Please verify the system time.\n"));
1298 _pam_log_debug(ctx, LOG_DEBUG,
1299 "User %s: Clock skew when getting Krb5 TGT\n",
1304 static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
1305 const struct wbcAuthErrorInfo *e,
1306 const char *nt_status_string,
1309 const char *ntstatus = NULL;
1310 const char *error_string = NULL;
1312 if (!e || !pam_error) {
1316 ntstatus = e->nt_string;
1321 if (strcasecmp(ntstatus, nt_status_string) == 0) {
1323 error_string = _get_ntstatus_error_string(nt_status_string);
1325 _make_remark(ctx, PAM_ERROR_MSG, error_string);
1326 *pam_error = e->pam_error;
1330 if (e->display_string) {
1331 _make_remark(ctx, PAM_ERROR_MSG, e->display_string);
1332 *pam_error = e->pam_error;
1336 _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
1337 *pam_error = e->pam_error;
1346 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1348 * @param i The wbcUserPasswordPolicyInfo struct.
1350 * @return string (caller needs to talloc_free).
1353 static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
1354 struct wbcUserPasswordPolicyInfo *i)
1362 str = talloc_asprintf(ctx, _("Your password "));
1367 if (i->min_length_password > 0) {
1368 str = talloc_asprintf_append(str,
1369 _("must be at least %d characters; "),
1370 i->min_length_password);
1376 if (i->password_history > 0) {
1377 str = talloc_asprintf_append(str,
1378 _("cannot repeat any of your previous %d "
1380 i->password_history);
1386 if (i->password_properties & WBC_DOMAIN_PASSWORD_COMPLEX) {
1387 str = talloc_asprintf_append(str,
1388 _("must contain capitals, numerals "
1390 "and cannot contain your account "
1397 str = talloc_asprintf_append(str,
1398 _("Please type a different password. "
1399 "Type a password which meets these requirements in "
1400 "both text boxes."));
1412 static int _pam_create_homedir(struct pwb_context *ctx,
1413 const char *dirname,
1418 if (stat(dirname, &sbuf) == 0) {
1422 if (mkdir(dirname, mode) != 0) {
1424 _make_remark_format(ctx, PAM_TEXT_INFO,
1425 _("Creating directory: %s failed: %s"),
1426 dirname, strerror(errno));
1427 _pam_log(ctx, LOG_ERR, "could not create dir: %s (%s)",
1428 dirname, strerror(errno));
1429 return PAM_PERM_DENIED;
1435 static int _pam_chown_homedir(struct pwb_context *ctx,
1436 const char *dirname,
1440 if (chown(dirname, uid, gid) != 0) {
1441 _pam_log(ctx, LOG_ERR, "failed to chown user homedir: %s (%s)",
1442 dirname, strerror(errno));
1443 return PAM_PERM_DENIED;
1449 static int _pam_mkhomedir(struct pwb_context *ctx)
1451 struct passwd *pwd = NULL;
1453 char *create_dir = NULL;
1454 char *user_dir = NULL;
1456 const char *username;
1458 char *safe_ptr = NULL;
1461 /* Get the username */
1462 ret = pam_get_user(ctx->pamh, &username, NULL);
1463 if ((ret != PAM_SUCCESS) || (!username)) {
1464 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1465 return PAM_SERVICE_ERR;
1468 pwd = getpwnam(username);
1470 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1471 return PAM_USER_UNKNOWN;
1473 _pam_log_debug(ctx, LOG_DEBUG, "homedir is: %s", pwd->pw_dir);
1475 ret = _pam_create_homedir(ctx, pwd->pw_dir, 0700);
1476 if (ret == PAM_SUCCESS) {
1477 ret = _pam_chown_homedir(ctx, pwd->pw_dir,
1482 if (ret == PAM_SUCCESS) {
1486 /* maybe we need to create parent dirs */
1487 create_dir = talloc_strdup(ctx, "/");
1492 /* find final directory */
1493 user_dir = strrchr(pwd->pw_dir, '/');
1499 _pam_log(ctx, LOG_DEBUG, "final directory: %s", user_dir);
1503 while ((token = strtok_r(p, "/", &safe_ptr)) != NULL) {
1509 _pam_log_debug(ctx, LOG_DEBUG, "token is %s", token);
1511 create_dir = talloc_asprintf_append(create_dir, "%s/", token);
1515 _pam_log_debug(ctx, LOG_DEBUG, "current_dir is %s", create_dir);
1517 if (strcmp(token, user_dir) == 0) {
1518 _pam_log_debug(ctx, LOG_DEBUG, "assuming last directory: %s", token);
1522 ret = _pam_create_homedir(ctx, create_dir, mode);
1528 return _pam_chown_homedir(ctx, create_dir,
1533 /* talk to winbindd */
1534 static int winbind_auth_request(struct pwb_context *ctx,
1539 const int warn_pwd_expire,
1540 struct wbcAuthErrorInfo **p_error,
1541 struct wbcLogonUserInfo **p_info,
1542 struct wbcUserPasswordPolicyInfo **p_policy,
1543 time_t *pwd_last_set,
1548 struct wbcLogonUserParams logon;
1549 char membership_of[1024];
1550 uid_t user_uid = -1;
1551 uint32_t flags = WBFLAG_PAM_INFO3_TEXT |
1552 WBFLAG_PAM_GET_PWD_POLICY;
1554 struct wbcLogonUserInfo *info = NULL;
1555 struct wbcAuthUserInfo *user_info = NULL;
1556 struct wbcAuthErrorInfo *error = NULL;
1557 struct wbcUserPasswordPolicyInfo *policy = NULL;
1559 int ret = PAM_AUTH_ERR;
1561 const char *codes[] = {
1562 "NT_STATUS_PASSWORD_EXPIRED",
1563 "NT_STATUS_PASSWORD_MUST_CHANGE",
1564 "NT_STATUS_INVALID_WORKSTATION",
1565 "NT_STATUS_INVALID_LOGON_HOURS",
1566 "NT_STATUS_ACCOUNT_EXPIRED",
1567 "NT_STATUS_ACCOUNT_DISABLED",
1568 "NT_STATUS_ACCOUNT_LOCKED_OUT",
1569 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1570 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1571 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1572 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1573 "NT_STATUS_NO_LOGON_SERVERS",
1574 "NT_STATUS_WRONG_PASSWORD",
1575 "NT_STATUS_ACCESS_DENIED"
1582 /* Krb5 auth always has to go against the KDC of the user's realm */
1584 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1585 flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
1588 if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1589 struct passwd *pwd = NULL;
1591 pwd = getpwnam(user);
1593 return PAM_USER_UNKNOWN;
1595 user_uid = pwd->pw_uid;
1598 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1600 _pam_log_debug(ctx, LOG_DEBUG,
1601 "enabling krb5 login flag\n");
1603 flags |= WBFLAG_PAM_KRB5 |
1604 WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1607 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1608 _pam_log_debug(ctx, LOG_DEBUG,
1609 "enabling cached login flag\n");
1610 flags |= WBFLAG_PAM_CACHED_LOGIN;
1615 flags |= WBFLAG_PAM_UNIX_NAME;
1618 if (cctype != NULL) {
1619 _pam_log_debug(ctx, LOG_DEBUG,
1620 "enabling request for a %s krb5 ccache\n",
1624 if (member != NULL) {
1626 ZERO_STRUCT(membership_of);
1628 if (!winbind_name_list_to_sid_string_list(ctx, user, member,
1630 sizeof(membership_of))) {
1631 _pam_log_debug(ctx, LOG_ERR,
1632 "failed to serialize membership of sid "
1633 "\"%s\"\n", member);
1634 return PAM_AUTH_ERR;
1640 logon.username = user;
1641 logon.password = pass;
1644 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1650 if (!WBC_ERROR_IS_OK(wbc_status)) {
1655 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1661 if (!WBC_ERROR_IS_OK(wbc_status)) {
1665 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1669 (uint8_t *)&user_uid,
1671 if (!WBC_ERROR_IS_OK(wbc_status)) {
1676 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1680 (uint8_t *)membership_of,
1681 sizeof(membership_of));
1682 if (!WBC_ERROR_IS_OK(wbc_status)) {
1687 wbc_status = wbcLogonUser(&logon, &info, &error, &policy);
1688 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1689 user, "wbcLogonUser");
1690 wbcFreeMemory(logon.blobs);
1693 if (info && info->info) {
1694 user_info = info->info;
1697 if (pwd_last_set && user_info) {
1698 *pwd_last_set = user_info->pass_last_set_time;
1701 if (p_info && info) {
1705 if (p_policy && policy) {
1709 if (p_error && error) {
1710 /* We want to process the error in the caller. */
1715 for (i=0; i<ARRAY_SIZE(codes); i++) {
1717 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1723 if ((ret == PAM_SUCCESS) && user_info && policy && info) {
1725 bool already_expired = false;
1727 /* warn a user if the password is about to expire soon */
1728 _pam_warn_password_expiry(ctx, user_info, policy,
1732 if (already_expired == true) {
1734 SMB_TIME_T last_set = user_info->pass_last_set_time;
1736 _pam_log_debug(ctx, LOG_DEBUG,
1737 "Password has expired "
1738 "(Password was last set: %lld, "
1739 "the policy says it should expire here "
1740 "%lld (now it's: %lu))\n",
1741 (long long int)last_set,
1742 (long long int)last_set +
1746 return PAM_AUTHTOK_EXPIRED;
1749 /* inform about logon type */
1750 _pam_warn_logon_type(ctx, user, user_info->user_flags);
1752 /* inform about krb5 failures */
1753 _pam_warn_krb5_failure(ctx, user, user_info->user_flags);
1755 /* set some info3 info for other modules in the stack */
1756 _pam_set_data_info3(ctx, user_info);
1758 /* put krb5ccname into env */
1759 _pam_setup_krb5_env(ctx, info);
1761 /* If winbindd returned a username, return the pointer to it
1763 _pam_setup_unix_username(ctx, user_ret, info);
1768 wbcFreeMemory(logon.blobs);
1770 if (info && info->blobs) {
1771 wbcFreeMemory(info->blobs);
1773 if (error && !p_error) {
1774 wbcFreeMemory(error);
1776 if (info && !p_info) {
1777 wbcFreeMemory(info);
1779 if (policy && !p_policy) {
1780 wbcFreeMemory(policy);
1786 /* talk to winbindd */
1787 static int winbind_chauthtok_request(struct pwb_context *ctx,
1789 const char *oldpass,
1790 const char *newpass,
1791 time_t pwd_last_set)
1794 struct wbcChangePasswordParams params;
1795 struct wbcAuthErrorInfo *error = NULL;
1796 struct wbcUserPasswordPolicyInfo *policy = NULL;
1797 enum wbcPasswordChangeRejectReason reject_reason = -1;
1801 const char *codes[] = {
1802 "NT_STATUS_BACKUP_CONTROLLER",
1803 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1804 "NT_STATUS_NO_LOGON_SERVERS",
1805 "NT_STATUS_ACCESS_DENIED",
1806 "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1807 "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1808 "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1810 int ret = PAM_AUTH_ERR;
1812 ZERO_STRUCT(params);
1814 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1815 flags |= WBFLAG_PAM_KRB5 |
1816 WBFLAG_PAM_CONTACT_TRUSTDOM;
1819 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1820 flags |= WBFLAG_PAM_CACHED_LOGIN;
1823 params.account_name = user;
1824 params.level = WBC_AUTH_USER_LEVEL_PLAIN;
1825 params.old_password.plaintext = oldpass;
1826 params.new_password.plaintext = newpass;
1827 params.flags = flags;
1829 wbc_status = wbcChangeUserPasswordEx(¶ms, &error, &reject_reason, &policy);
1830 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1831 user, "wbcChangeUserPasswordEx");
1833 if (WBC_ERROR_IS_OK(wbc_status)) {
1834 _pam_log(ctx, LOG_NOTICE,
1835 "user '%s' password changed", user);
1840 wbcFreeMemory(policy);
1844 for (i=0; i<ARRAY_SIZE(codes); i++) {
1846 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1852 if (!strcasecmp(error->nt_string,
1853 "NT_STATUS_PASSWORD_RESTRICTION")) {
1855 char *pwd_restriction_string = NULL;
1856 SMB_TIME_T min_pwd_age = 0;
1859 min_pwd_age = policy->min_passwordage;
1862 /* FIXME: avoid to send multiple PAM messages after another */
1863 switch (reject_reason) {
1866 case WBC_PWD_CHANGE_NO_ERROR:
1867 if ((min_pwd_age > 0) &&
1868 (pwd_last_set + min_pwd_age > time(NULL))) {
1869 PAM_WB_REMARK_DIRECT(ctx,
1870 "NT_STATUS_PWD_TOO_RECENT");
1873 case WBC_PWD_CHANGE_PASSWORD_TOO_SHORT:
1874 PAM_WB_REMARK_DIRECT(ctx,
1875 "NT_STATUS_PWD_TOO_SHORT");
1877 case WBC_PWD_CHANGE_PWD_IN_HISTORY:
1878 PAM_WB_REMARK_DIRECT(ctx,
1879 "NT_STATUS_PWD_HISTORY_CONFLICT");
1881 case WBC_PWD_CHANGE_NOT_COMPLEX:
1882 _make_remark(ctx, PAM_ERROR_MSG,
1883 _("Password does not meet "
1884 "complexity requirements"));
1887 _pam_log_debug(ctx, LOG_DEBUG,
1888 "unknown password change "
1889 "reject reason: %d",
1894 pwd_restriction_string =
1895 _pam_compose_pwd_restriction_string(ctx, policy);
1896 if (pwd_restriction_string) {
1897 _make_remark(ctx, PAM_ERROR_MSG,
1898 pwd_restriction_string);
1899 TALLOC_FREE(pwd_restriction_string);
1903 wbcFreeMemory(error);
1904 wbcFreeMemory(policy);
1910 * Checks if a user has an account
1913 * 1 = User not found
1917 static int valid_user(struct pwb_context *ctx,
1920 /* check not only if the user is available over NSS calls, also make
1921 * sure it's really a winbind user, this is important when stacking PAM
1922 * modules in the 'account' or 'password' facility. */
1925 struct passwd *pwd = NULL;
1926 struct passwd *wb_pwd = NULL;
1928 pwd = getpwnam(user);
1933 wbc_status = wbcGetpwnam(user, &wb_pwd);
1934 wbcFreeMemory(wb_pwd);
1935 if (!WBC_ERROR_IS_OK(wbc_status)) {
1936 _pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
1937 wbcErrorString(wbc_status));
1940 switch (wbc_status) {
1941 case WBC_ERR_UNKNOWN_USER:
1943 case WBC_ERR_SUCCESS:
1951 static char *_pam_delete(register char *xx)
1959 * obtain a password from the user
1962 static int _winbind_read_password(struct pwb_context *ctx,
1964 const char *comment,
1965 const char *prompt1,
1966 const char *prompt2,
1974 _pam_log(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
1977 * make sure nothing inappropriate gets returned
1980 *pass = token = NULL;
1983 * which authentication token are we getting?
1986 if (on(WINBIND__OLD_PASSWORD, ctrl)) {
1987 authtok_flag = PAM_OLDAUTHTOK;
1989 authtok_flag = PAM_AUTHTOK;
1993 * should we obtain the password from a PAM item ?
1996 if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
1997 on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
1998 retval = _pam_get_item(ctx->pamh, authtok_flag, &item);
1999 if (retval != PAM_SUCCESS) {
2001 _pam_log(ctx, LOG_ALERT,
2002 "pam_get_item returned error "
2003 "to unix-read-password");
2005 } else if (item != NULL) { /* we have a password! */
2008 _pam_log(ctx, LOG_DEBUG,
2009 "pam_get_item returned a password");
2011 } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2012 return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
2013 } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
2014 && off(WINBIND__OLD_PASSWORD, ctrl)) {
2015 return PAM_AUTHTOK_RECOVER_ERR;
2019 * getting here implies we will have to get the password from the
2024 struct pam_message msg[3], *pmsg[3];
2025 struct pam_response *resp;
2028 /* prepare to converse */
2030 if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
2032 msg[0].msg_style = PAM_TEXT_INFO;
2033 msg[0].msg = discard_const_p(char, comment);
2040 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2041 msg[i++].msg = discard_const_p(char, prompt1);
2044 if (prompt2 != NULL) {
2046 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2047 msg[i++].msg = discard_const_p(char, prompt2);
2050 /* so call the conversation expecting i responses */
2052 retval = converse(ctx->pamh, i, pmsg, &resp);
2054 if (retval == PAM_SUCCESS) {
2055 retval = PAM_AUTHTOK_RECOVER_ERR;
2059 if (retval != PAM_SUCCESS) {
2060 _pam_drop_reply(resp, i);
2064 /* interpret the response */
2066 token = x_strdup(resp[i - replies].resp);
2068 _pam_log(ctx, LOG_NOTICE,
2069 "could not recover "
2070 "authentication token");
2071 retval = PAM_AUTHTOK_RECOVER_ERR;
2076 /* verify that password entered correctly */
2077 if (!resp[i - 1].resp ||
2078 strcmp(token, resp[i - 1].resp)) {
2079 _pam_delete(token); /* mistyped */
2080 retval = PAM_AUTHTOK_RECOVER_ERR;
2081 _make_remark(ctx, PAM_ERROR_MSG,
2087 * tidy up the conversation (resp_retcode) is ignored
2088 * -- what is it for anyway? AGM
2090 _pam_drop_reply(resp, i);
2094 if (retval != PAM_SUCCESS) {
2095 _pam_log_debug(ctx, LOG_DEBUG,
2096 "unable to obtain a password");
2099 /* 'token' is the entered password */
2101 /* we store this password as an item */
2103 retval = pam_set_item(ctx->pamh, authtok_flag, token);
2104 _pam_delete(token); /* clean it up */
2105 if (retval != PAM_SUCCESS ||
2106 (retval = _pam_get_item(ctx->pamh, authtok_flag, &item)) != PAM_SUCCESS) {
2108 _pam_log(ctx, LOG_CRIT, "error manipulating password");
2114 item = NULL; /* break link to password */
2119 static const char *get_conf_item_string(struct pwb_context *ctx,
2124 const char *parm_opt = NULL;
2126 if (!(ctx->ctrl & config_flag)) {
2130 /* let the pam opt take precedence over the pam_winbind.conf option */
2131 for (i=0; i<ctx->argc; i++) {
2133 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2136 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2137 _pam_log(ctx, LOG_INFO,
2138 "no \"=\" delimiter for \"%s\" found\n",
2142 _pam_log_debug(ctx, LOG_INFO,
2143 "PAM config: %s '%s'\n", item, p+1);
2151 key = talloc_asprintf(ctx, "global:%s", item);
2156 parm_opt = iniparser_getstr(ctx->dict, key);
2159 _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
2166 static int get_config_item_int(struct pwb_context *ctx,
2170 int i, parm_opt = -1;
2172 if (!(ctx->ctrl & config_flag)) {
2176 /* let the pam opt take precedence over the pam_winbind.conf option */
2177 for (i = 0; i < ctx->argc; i++) {
2179 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2182 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2183 _pam_log(ctx, LOG_INFO,
2184 "no \"=\" delimiter for \"%s\" found\n",
2188 parm_opt = atoi(p + 1);
2189 _pam_log_debug(ctx, LOG_INFO,
2190 "PAM config: %s '%d'\n",
2199 key = talloc_asprintf(ctx, "global:%s", item);
2204 parm_opt = iniparser_getint(ctx->dict, key, -1);
2207 _pam_log_debug(ctx, LOG_INFO,
2208 "CONFIG file: %s '%d'\n",
2215 static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
2217 return get_conf_item_string(ctx, "krb5_ccache_type",
2218 WINBIND_KRB5_CCACHE_TYPE);
2221 static const char *get_member_from_config(struct pwb_context *ctx)
2223 const char *ret = NULL;
2224 ret = get_conf_item_string(ctx, "require_membership_of",
2225 WINBIND_REQUIRED_MEMBERSHIP);
2229 return get_conf_item_string(ctx, "require-membership-of",
2230 WINBIND_REQUIRED_MEMBERSHIP);
2233 static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
2236 ret = get_config_item_int(ctx, "warn_pwd_expire",
2237 WINBIND_WARN_PWD_EXPIRE);
2238 /* no or broken setting */
2240 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
2246 * Retrieve the winbind separator.
2248 * @param ctx PAM winbind context.
2250 * @return string separator character. NULL on failure.
2253 static char winbind_get_separator(struct pwb_context *ctx)
2256 static struct wbcInterfaceDetails *details = NULL;
2258 wbc_status = wbcInterfaceDetails(&details);
2259 if (!WBC_ERROR_IS_OK(wbc_status)) {
2260 _pam_log(ctx, LOG_ERR,
2261 "Could not retrieve winbind interface details: %s",
2262 wbcErrorString(wbc_status));
2270 return details->winbind_separator;
2275 * Convert a upn to a name.
2277 * @param ctx PAM winbind context.
2278 * @param upn USer UPN to be trabslated.
2280 * @return converted name. NULL pointer on failure. Caller needs to free.
2283 static char* winbind_upn_to_username(struct pwb_context *ctx,
2287 wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
2288 struct wbcDomainSid sid;
2289 enum wbcSidType type;
2294 /* This cannot work when the winbind separator = @ */
2296 sep = winbind_get_separator(ctx);
2297 if (!sep || sep == '@') {
2301 name = talloc_strdup(ctx, upn);
2305 if ((p = strchr(name, '@')) != NULL) {
2310 /* Convert the UPN to a SID */
2312 wbc_status = wbcLookupName(domain, name, &sid, &type);
2313 if (!WBC_ERROR_IS_OK(wbc_status)) {
2317 /* Convert the the SID back to the sAMAccountName */
2319 wbc_status = wbcLookupSid(&sid, &domain, &name, &type);
2320 if (!WBC_ERROR_IS_OK(wbc_status)) {
2324 return talloc_asprintf(ctx, "%s\\%s", domain, name);
2327 static int _pam_delete_cred(pam_handle_t *pamh, int flags,
2328 int argc, const char **argv)
2330 int retval = PAM_SUCCESS;
2331 struct pwb_context *ctx = NULL;
2332 struct wbcLogoffUserParams logoff;
2333 struct wbcAuthErrorInfo *error = NULL;
2335 wbcErr wbc_status = WBC_ERR_SUCCESS;
2337 ZERO_STRUCT(logoff);
2339 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2344 _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
2346 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2348 /* destroy the ccache here */
2350 uint32_t wbc_flags = 0;
2351 const char *ccname = NULL;
2352 struct passwd *pwd = NULL;
2354 retval = pam_get_user(pamh, &user, _("Username: "));
2356 _pam_log(ctx, LOG_ERR,
2357 "could not identify user");
2362 _pam_log(ctx, LOG_ERR,
2363 "username was NULL!");
2364 retval = PAM_USER_UNKNOWN;
2368 _pam_log_debug(ctx, LOG_DEBUG,
2369 "username [%s] obtained", user);
2371 ccname = pam_getenv(pamh, "KRB5CCNAME");
2372 if (ccname == NULL) {
2373 _pam_log_debug(ctx, LOG_DEBUG,
2374 "user has no KRB5CCNAME environment");
2377 pwd = getpwnam(user);
2379 retval = PAM_USER_UNKNOWN;
2383 wbc_flags = WBFLAG_PAM_KRB5 |
2384 WBFLAG_PAM_CONTACT_TRUSTDOM;
2386 logoff.username = user;
2389 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2395 if (!WBC_ERROR_IS_OK(wbc_status)) {
2400 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2404 (uint8_t *)&wbc_flags,
2406 if (!WBC_ERROR_IS_OK(wbc_status)) {
2410 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2414 (uint8_t *)&pwd->pw_uid,
2415 sizeof(pwd->pw_uid));
2416 if (!WBC_ERROR_IS_OK(wbc_status)) {
2420 wbc_status = wbcLogoffUserEx(&logoff, &error);
2421 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2422 user, "wbcLogoffUser");
2423 wbcFreeMemory(error);
2424 wbcFreeMemory(logoff.blobs);
2425 logoff.blobs = NULL;
2427 if (!WBC_ERROR_IS_OK(wbc_status)) {
2428 _pam_log(ctx, LOG_INFO,
2429 "failed to logoff user %s: %s\n",
2430 user, wbcErrorString(wbc_status));
2436 wbcFreeMemory(logoff.blobs);
2439 if (!WBC_ERROR_IS_OK(wbc_status)) {
2440 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2441 user, "wbcLogoffUser");
2445 * Delete the krb5 ccname variable from the PAM environment
2446 * if it was set by winbind.
2448 if ((ctx->ctrl & WINBIND_KRB5_AUTH) && pam_getenv(pamh, "KRB5CCNAME")) {
2449 pam_putenv(pamh, "KRB5CCNAME");
2452 _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx, retval);
2460 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
2461 int argc, const char **argv)
2463 const char *username;
2464 const char *password;
2465 const char *member = NULL;
2466 const char *cctype = NULL;
2467 int warn_pwd_expire;
2468 int retval = PAM_AUTH_ERR;
2469 char *username_ret = NULL;
2470 char *new_authtok_required = NULL;
2471 char *real_username = NULL;
2472 struct pwb_context *ctx = NULL;
2474 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2479 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
2481 /* Get the username */
2482 retval = pam_get_user(pamh, &username, NULL);
2483 if ((retval != PAM_SUCCESS) || (!username)) {
2484 _pam_log_debug(ctx, LOG_DEBUG,
2485 "can not get the username");
2486 retval = PAM_SERVICE_ERR;
2492 /* Decode the user name since AIX does not support logn user
2493 names by default. The name is encoded as _#uid. */
2495 if (username[0] == '_') {
2496 uid_t id = atoi(&username[1]);
2497 struct passwd *pw = NULL;
2499 if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
2500 real_username = strdup(pw->pw_name);
2505 if (!real_username) {
2506 /* Just making a copy of the username we got from PAM */
2507 if ((real_username = strdup(username)) == NULL) {
2508 _pam_log_debug(ctx, LOG_DEBUG,
2509 "memory allocation failure when copying "
2511 retval = PAM_SERVICE_ERR;
2516 /* Maybe this was a UPN */
2518 if (strchr(real_username, '@') != NULL) {
2519 char *samaccountname = NULL;
2521 samaccountname = winbind_upn_to_username(ctx,
2523 if (samaccountname) {
2524 free(real_username);
2525 real_username = strdup(samaccountname);
2529 retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
2530 _("Password: "), NULL,
2533 if (retval != PAM_SUCCESS) {
2534 _pam_log(ctx, LOG_ERR,
2535 "Could not retrieve user's password");
2536 retval = PAM_AUTHTOK_ERR;
2540 /* Let's not give too much away in the log file */
2542 #ifdef DEBUG_PASSWORD
2543 _pam_log_debug(ctx, LOG_INFO,
2544 "Verify user '%s' with password '%s'",
2545 real_username, password);
2547 _pam_log_debug(ctx, LOG_INFO,
2548 "Verify user '%s'", real_username);
2551 member = get_member_from_config(ctx);
2552 cctype = get_krb5_cc_type_from_config(ctx);
2553 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2555 /* Now use the username to look up password */
2556 retval = winbind_auth_request(ctx, real_username, password,
2557 member, cctype, warn_pwd_expire,
2559 NULL, &username_ret);
2561 if (retval == PAM_NEW_AUTHTOK_REQD ||
2562 retval == PAM_AUTHTOK_EXPIRED) {
2564 char *new_authtok_required_during_auth = NULL;
2566 new_authtok_required = talloc_asprintf(NULL, "%d", retval);
2567 if (!new_authtok_required) {
2568 retval = PAM_BUF_ERR;
2572 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2573 new_authtok_required,
2574 _pam_winbind_cleanup_func);
2576 retval = PAM_SUCCESS;
2578 new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
2579 if (!new_authtok_required_during_auth) {
2580 retval = PAM_BUF_ERR;
2584 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2585 new_authtok_required_during_auth,
2586 _pam_winbind_cleanup_func);
2593 pam_set_item (pamh, PAM_USER, username_ret);
2594 _pam_log_debug(ctx, LOG_INFO,
2595 "Returned user was '%s'", username_ret);
2599 if (real_username) {
2600 free(real_username);
2603 if (!new_authtok_required) {
2604 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2607 if (retval != PAM_SUCCESS) {
2608 _pam_free_data_info3(pamh);
2611 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
2619 int pam_sm_setcred(pam_handle_t *pamh, int flags,
2620 int argc, const char **argv)
2622 int ret = PAM_SYSTEM_ERR;
2623 struct pwb_context *ctx = NULL;
2625 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2630 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
2632 switch (flags & ~PAM_SILENT) {
2634 case PAM_DELETE_CRED:
2635 ret = _pam_delete_cred(pamh, flags, argc, argv);
2637 case PAM_REFRESH_CRED:
2638 _pam_log_debug(ctx, LOG_WARNING,
2639 "PAM_REFRESH_CRED not implemented");
2642 case PAM_REINITIALIZE_CRED:
2643 _pam_log_debug(ctx, LOG_WARNING,
2644 "PAM_REINITIALIZE_CRED not implemented");
2647 case PAM_ESTABLISH_CRED:
2648 _pam_log_debug(ctx, LOG_WARNING,
2649 "PAM_ESTABLISH_CRED not implemented");
2653 ret = PAM_SYSTEM_ERR;
2659 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
2667 * Account management. We want to verify that the account exists
2668 * before returning PAM_SUCCESS
2671 int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2672 int argc, const char **argv)
2674 const char *username;
2675 int ret = PAM_USER_UNKNOWN;
2677 struct pwb_context *ctx = NULL;
2679 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2684 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
2687 /* Get the username */
2688 ret = pam_get_user(pamh, &username, NULL);
2689 if ((ret != PAM_SUCCESS) || (!username)) {
2690 _pam_log_debug(ctx, LOG_DEBUG,
2691 "can not get the username");
2692 ret = PAM_SERVICE_ERR;
2696 /* Verify the username */
2697 ret = valid_user(ctx, username);
2700 /* some sort of system error. The log was already printed */
2701 ret = PAM_SERVICE_ERR;
2704 /* the user does not exist */
2705 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
2707 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
2711 ret = PAM_USER_UNKNOWN;
2714 pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2715 (const void **)&tmp);
2717 ret = atoi((const char *)tmp);
2719 case PAM_AUTHTOK_EXPIRED:
2720 /* fall through, since new token is required in this case */
2721 case PAM_NEW_AUTHTOK_REQD:
2722 _pam_log(ctx, LOG_WARNING,
2723 "pam_sm_acct_mgmt success but %s is set",
2724 PAM_WINBIND_NEW_AUTHTOK_REQD);
2725 _pam_log(ctx, LOG_NOTICE,
2726 "user '%s' needs new password",
2728 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2729 ret = PAM_NEW_AUTHTOK_REQD;
2732 _pam_log(ctx, LOG_WARNING,
2733 "pam_sm_acct_mgmt success");
2734 _pam_log(ctx, LOG_NOTICE,
2735 "user '%s' granted access", username);
2741 /* Otherwise, the authentication looked good */
2742 _pam_log(ctx, LOG_NOTICE,
2743 "user '%s' granted access", username);
2747 /* we don't know anything about this return value */
2748 _pam_log(ctx, LOG_ERR,
2749 "internal module error (ret = %d, user = '%s')",
2751 ret = PAM_SERVICE_ERR;
2755 /* should not be reached */
2760 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
2768 int pam_sm_open_session(pam_handle_t *pamh, int flags,
2769 int argc, const char **argv)
2771 int ret = PAM_SUCCESS;
2772 struct pwb_context *ctx = NULL;
2774 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2779 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
2781 if (ctx->ctrl & WINBIND_MKHOMEDIR) {
2782 /* check and create homedir */
2783 ret = _pam_mkhomedir(ctx);
2786 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
2794 int pam_sm_close_session(pam_handle_t *pamh, int flags,
2795 int argc, const char **argv)
2797 int ret = PAM_SUCCESS;
2798 struct pwb_context *ctx = NULL;
2800 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2805 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
2808 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
2816 * evaluate whether we need to re-authenticate with kerberos after a
2819 * @param ctx PAM winbind context.
2820 * @param user The username
2822 * @return boolean Returns true if required, false if not.
2825 static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
2829 /* Make sure that we only do this if a) the chauthtok got initiated
2830 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2831 * later password change via the "passwd" command if done by the user
2833 * NB. If we login from gdm or xdm and the password expires,
2834 * we change the password, but there is no memory cache.
2835 * Thus, even for passthrough login, we should do the
2836 * authentication again to update memory cache.
2840 char *new_authtok_reqd_during_auth = NULL;
2841 struct passwd *pwd = NULL;
2843 _pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2844 &new_authtok_reqd_during_auth);
2845 pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2848 if (new_authtok_reqd_during_auth) {
2852 pwd = getpwnam(user);
2857 if (getuid() == pwd->pw_uid) {
2866 int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
2867 int argc, const char **argv)
2871 bool cached_login = false;
2873 /* <DO NOT free() THESE> */
2875 char *pass_old, *pass_new;
2876 /* </DO NOT free() THESE> */
2881 char *username_ret = NULL;
2882 struct wbcAuthErrorInfo *error = NULL;
2883 struct pwb_context *ctx = NULL;
2885 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2890 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
2892 cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
2894 /* clearing offline bit for auth */
2895 ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
2898 * First get the name of a user
2900 ret = pam_get_user(pamh, &user, _("Username: "));
2902 _pam_log(ctx, LOG_ERR,
2903 "password - could not identify user");
2908 _pam_log(ctx, LOG_ERR, "username was NULL!");
2909 ret = PAM_USER_UNKNOWN;
2913 _pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
2915 /* check if this is really a user in winbindd, not only in NSS */
2916 ret = valid_user(ctx, user);
2919 ret = PAM_USER_UNKNOWN;
2922 ret = PAM_SYSTEM_ERR;
2929 * obtain and verify the current password (OLDAUTHTOK) for
2933 if (flags & PAM_PRELIM_CHECK) {
2934 time_t pwdlastset_prelim = 0;
2936 /* instruct user what is happening */
2938 #define greeting _("Changing password for")
2939 Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
2941 _pam_log(ctx, LOG_CRIT,
2942 "password - out of memory");
2948 lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
2949 ret = _winbind_read_password(ctx, lctrl,
2951 _("(current) NT password: "),
2953 (const char **) &pass_old);
2954 TALLOC_FREE(Announce);
2955 if (ret != PAM_SUCCESS) {
2956 _pam_log(ctx, LOG_NOTICE,
2957 "password - (old) token not obtained");
2961 /* verify that this is the password for this user */
2963 ret = winbind_auth_request(ctx, user, pass_old,
2966 &pwdlastset_prelim, NULL);
2968 if (ret != PAM_ACCT_EXPIRED &&
2969 ret != PAM_AUTHTOK_EXPIRED &&
2970 ret != PAM_NEW_AUTHTOK_REQD &&
2971 ret != PAM_SUCCESS) {
2976 pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
2977 (void *)pwdlastset_prelim, NULL);
2979 ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
2980 (const void *) pass_old);
2982 if (ret != PAM_SUCCESS) {
2983 _pam_log(ctx, LOG_CRIT,
2984 "failed to set PAM_OLDAUTHTOK");
2986 } else if (flags & PAM_UPDATE_AUTHTOK) {
2988 time_t pwdlastset_update = 0;
2991 * obtain the proposed password
2995 * get the old token back.
2998 ret = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
3000 if (ret != PAM_SUCCESS) {
3001 _pam_log(ctx, LOG_NOTICE,
3002 "user not authenticated");
3006 lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
3008 if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
3009 lctrl |= WINBIND_USE_FIRST_PASS_ARG;
3012 ret = PAM_AUTHTOK_ERR;
3013 while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
3015 * use_authtok is to force the use of a previously entered
3016 * password -- needed for pluggable password strength checking
3019 ret = _winbind_read_password(ctx, lctrl,
3021 _("Enter new NT password: "),
3022 _("Retype new NT password: "),
3023 (const char **)&pass_new);
3025 if (ret != PAM_SUCCESS) {
3026 _pam_log_debug(ctx, LOG_ALERT,
3028 "new password not obtained");
3029 pass_old = NULL;/* tidy up */
3034 * At this point we know who the user is and what they
3035 * propose as their new password. Verify that the new
3036 * password is acceptable.
3039 if (pass_new[0] == '\0') {/* "\0" password = NULL */
3045 * By reaching here we have approved the passwords and must now
3046 * rebuild the password database file.
3048 _pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3049 &pwdlastset_update);
3052 * if cached creds were enabled, make sure to set the
3053 * WINBIND_CACHED_LOGIN bit here in order to have winbindd
3054 * update the cached creds storage - gd
3057 ctx->ctrl |= WINBIND_CACHED_LOGIN;
3060 ret = winbind_chauthtok_request(ctx, user, pass_old,
3061 pass_new, pwdlastset_update);
3063 pass_old = pass_new = NULL;
3067 if (_pam_require_krb5_auth_after_chauthtok(ctx, user)) {
3069 const char *member = NULL;
3070 const char *cctype = NULL;
3071 int warn_pwd_expire;
3072 struct wbcLogonUserInfo *info = NULL;
3073 struct wbcUserPasswordPolicyInfo *policy = NULL;
3075 member = get_member_from_config(ctx);
3076 cctype = get_krb5_cc_type_from_config(ctx);
3077 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
3079 /* Keep WINBIND_CACHED_LOGIN bit for
3080 * authentication after changing the password.
3081 * This will update the cached credentials in case
3082 * that winbindd_dual_pam_chauthtok() fails
3087 ret = winbind_auth_request(ctx, user, pass_new,
3089 &error, &info, &policy,
3090 NULL, &username_ret);
3091 pass_old = pass_new = NULL;
3093 if (ret == PAM_SUCCESS) {
3095 struct wbcAuthUserInfo *user_info = NULL;
3097 if (info && info->info) {
3098 user_info = info->info;
3101 /* warn a user if the password is about to
3103 _pam_warn_password_expiry(ctx, user_info, policy,
3107 /* set some info3 info for other modules in the
3109 _pam_set_data_info3(ctx, user_info);
3111 /* put krb5ccname into env */
3112 _pam_setup_krb5_env(ctx, info);
3115 pam_set_item(pamh, PAM_USER,
3117 _pam_log_debug(ctx, LOG_INFO,
3118 "Returned user was '%s'",
3123 wbcFreeMemory(info);
3124 wbcFreeMemory(policy);
3130 ret = PAM_SERVICE_ERR;
3135 /* Deal with offline errors. */
3137 const char *codes[] = {
3138 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3139 "NT_STATUS_NO_LOGON_SERVERS",
3140 "NT_STATUS_ACCESS_DENIED"
3143 for (i=0; i<ARRAY_SIZE(codes); i++) {
3145 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
3151 wbcFreeMemory(error);
3153 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
3162 /* static module data */
3164 struct pam_module _pam_winbind_modstruct = {
3166 pam_sm_authenticate,
3169 pam_sm_open_session,
3170 pam_sm_close_session,
3177 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3178 * Copyright (c) Tim Potter <tpot@samba.org> 2000
3179 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3180 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3181 * Copyright (c) Jan Rêkorajski 1999.
3182 * Copyright (c) Andrew G. Morgan 1996-8.
3183 * Copyright (c) Alex O. Yuriev, 1996.
3184 * Copyright (c) Cristian Gafton 1996.
3185 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3187 * Redistribution and use in source and binary forms, with or without
3188 * modification, are permitted provided that the following conditions
3190 * 1. Redistributions of source code must retain the above copyright
3191 * notice, and the entire permission notice in its entirety,
3192 * including the disclaimer of warranties.
3193 * 2. Redistributions in binary form must reproduce the above copyright
3194 * notice, this list of conditions and the following disclaimer in the
3195 * documentation and/or other materials provided with the distribution.
3196 * 3. The name of the author may not be used to endorse or promote
3197 * products derived from this software without specific prior
3198 * written permission.
3200 * ALTERNATIVELY, this product may be distributed under the terms of
3201 * the GNU Public License, in which case the provisions of the GPL are
3202 * required INSTEAD OF the above restrictions. (This clause is
3203 * necessary due to a potential bad interaction between the GPL and
3204 * the restrictions contained in a BSD-style copyright.)
3206 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3207 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3208 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3209 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3210 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3211 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3212 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3213 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3214 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3215 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3216 * OF THE POSSIBILITY OF SUCH DAMAGE.