3 Copyright Andrew Tridgell <tridge@samba.org> 2000
4 Copyright Tim Potter <tpot@samba.org> 2000
5 Copyright Andrew Bartlett <abartlet@samba.org> 2002
6 Copyright Guenther Deschner <gd@samba.org> 2005-2008
8 largely based on pam_userdb by Cristian Gafton <gafton@redhat.com> also
9 contains large slabs of code from pam_unix by Elliot Lee
10 <sopwith@redhat.com> (see copyright below for full details)
13 #include "pam_winbind.h"
15 enum pam_winbind_request_type
17 PAM_WINBIND_AUTHENTICATE,
19 PAM_WINBIND_ACCT_MGMT,
20 PAM_WINBIND_OPEN_SESSION,
21 PAM_WINBIND_CLOSE_SESSION,
22 PAM_WINBIND_CHAUTHTOK,
26 static int wbc_error_to_pam_error(wbcErr status)
31 case WBC_ERR_NOT_IMPLEMENTED:
32 return PAM_SERVICE_ERR;
33 case WBC_ERR_UNKNOWN_FAILURE:
35 case WBC_ERR_NO_MEMORY:
37 case WBC_ERR_INVALID_SID:
38 case WBC_ERR_INVALID_PARAM:
40 case WBC_ERR_WINBIND_NOT_AVAILABLE:
41 return PAM_AUTHINFO_UNAVAIL;
42 case WBC_ERR_DOMAIN_NOT_FOUND:
43 return PAM_AUTHINFO_UNAVAIL;
44 case WBC_ERR_INVALID_RESPONSE:
46 case WBC_ERR_NSS_ERROR:
47 return PAM_USER_UNKNOWN;
48 case WBC_ERR_AUTH_ERROR:
50 case WBC_ERR_UNKNOWN_USER:
51 return PAM_USER_UNKNOWN;
52 case WBC_ERR_UNKNOWN_GROUP:
53 return PAM_USER_UNKNOWN;
54 case WBC_ERR_PWD_CHANGE_FAILED:
62 static const char *_pam_error_code_str(int err)
68 return "PAM_OPEN_ERR";
70 return "PAM_SYMBOL_ERR";
72 return "PAM_SERVICE_ERR";
74 return "PAM_SYSTEM_ERR";
78 return "PAM_PERM_DENIED";
80 return "PAM_AUTH_ERR";
81 case PAM_CRED_INSUFFICIENT:
82 return "PAM_CRED_INSUFFICIENT";
83 case PAM_AUTHINFO_UNAVAIL:
84 return "PAM_AUTHINFO_UNAVAIL";
85 case PAM_USER_UNKNOWN:
86 return "PAM_USER_UNKNOWN";
88 return "PAM_MAXTRIES";
89 case PAM_NEW_AUTHTOK_REQD:
90 return "PAM_NEW_AUTHTOK_REQD";
91 case PAM_ACCT_EXPIRED:
92 return "PAM_ACCT_EXPIRED";
94 return "PAM_SESSION_ERR";
95 case PAM_CRED_UNAVAIL:
96 return "PAM_CRED_UNAVAIL";
97 case PAM_CRED_EXPIRED:
98 return "PAM_CRED_EXPIRED";
100 return "PAM_CRED_ERR";
101 case PAM_NO_MODULE_DATA:
102 return "PAM_NO_MODULE_DATA";
104 return "PAM_CONV_ERR";
105 case PAM_AUTHTOK_ERR:
106 return "PAM_AUTHTOK_ERR";
107 case PAM_AUTHTOK_RECOVER_ERR:
108 return "PAM_AUTHTOK_RECOVER_ERR";
109 case PAM_AUTHTOK_LOCK_BUSY:
110 return "PAM_AUTHTOK_LOCK_BUSY";
111 case PAM_AUTHTOK_DISABLE_AGING:
112 return "PAM_AUTHTOK_DISABLE_AGING";
114 return "PAM_TRY_AGAIN";
119 case PAM_AUTHTOK_EXPIRED:
120 return "PAM_AUTHTOK_EXPIRED";
121 #ifdef PAM_MODULE_UNKNOWN
122 case PAM_MODULE_UNKNOWN:
123 return "PAM_MODULE_UNKNOWN";
127 return "PAM_BAD_ITEM";
129 #ifdef PAM_CONV_AGAIN
131 return "PAM_CONV_AGAIN";
133 #ifdef PAM_INCOMPLETE
135 return "PAM_INCOMPLETE";
142 #define _PAM_LOG_FUNCTION_ENTER(function, ctx) \
144 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] ENTER: " \
145 function " (flags: 0x%04x)", ctx->pamh, ctx->flags); \
146 _pam_log_state(ctx); \
149 #define _PAM_LOG_FUNCTION_LEAVE(function, ctx, retval) \
151 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] LEAVE: " \
152 function " returning %d (%s)", ctx ? ctx->pamh : NULL, retval, \
153 _pam_error_code_str(retval)); \
154 _pam_log_state(ctx); \
159 #define MAX_PASSWD_TRIES 3
162 static char initialized = 0;
164 static inline void textdomain_init(void);
165 static inline void textdomain_init(void)
168 bindtextdomain(MODULE_NAME, LOCALEDIR);
176 /* some syslogging */
178 #ifdef HAVE_PAM_VSYSLOG
179 static void _pam_log_int(const pam_handle_t *pamh,
184 pam_vsyslog(pamh, err, format, args);
187 static void _pam_log_int(const pam_handle_t *pamh,
192 char *format2 = NULL;
195 pam_get_item(pamh, PAM_SERVICE, (const void **) &service);
197 format2 = (char *)malloc(strlen(MODULE_NAME)+strlen(format)+strlen(service)+5);
198 if (format2 == NULL) {
199 /* what else todo ? */
200 vsyslog(err, format, args);
204 sprintf(format2, "%s(%s): %s", MODULE_NAME, service, format);
205 vsyslog(err, format2, args);
208 #endif /* HAVE_PAM_VSYSLOG */
210 static bool _pam_log_is_silent(int ctrl)
212 return on(ctrl, WINBIND_SILENT);
215 static void _pam_log(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
216 static void _pam_log(struct pwb_context *r, int err, const char *format, ...)
220 if (_pam_log_is_silent(r->ctrl)) {
224 va_start(args, format);
225 _pam_log_int(r->pamh, err, format, args);
228 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
229 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
233 if (_pam_log_is_silent(ctrl)) {
237 va_start(args, format);
238 _pam_log_int(pamh, err, format, args);
242 static bool _pam_log_is_debug_enabled(int ctrl)
248 if (_pam_log_is_silent(ctrl)) {
252 if (!(ctrl & WINBIND_DEBUG_ARG)) {
259 static bool _pam_log_is_debug_state_enabled(int ctrl)
261 if (!(ctrl & WINBIND_DEBUG_STATE)) {
265 return _pam_log_is_debug_enabled(ctrl);
268 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
269 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...)
273 if (!r || !_pam_log_is_debug_enabled(r->ctrl)) {
277 va_start(args, format);
278 _pam_log_int(r->pamh, err, format, args);
281 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
282 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
286 if (!_pam_log_is_debug_enabled(ctrl)) {
290 va_start(args, format);
291 _pam_log_int(pamh, err, format, args);
295 static void _pam_log_state_datum(struct pwb_context *ctx,
300 const void *data = NULL;
301 if (item_type != 0) {
302 pam_get_item(ctx->pamh, item_type, &data);
304 pam_get_data(ctx->pamh, key, &data);
307 const char *type = (item_type != 0) ? "ITEM" : "DATA";
308 if (is_string != 0) {
309 _pam_log_debug(ctx, LOG_DEBUG,
310 "[pamh: %p] STATE: %s(%s) = \"%s\" (%p)",
311 ctx->pamh, type, key, (const char *)data,
314 _pam_log_debug(ctx, LOG_DEBUG,
315 "[pamh: %p] STATE: %s(%s) = %p",
316 ctx->pamh, type, key, data);
321 #define _PAM_LOG_STATE_DATA_POINTER(ctx, module_data_name) \
322 _pam_log_state_datum(ctx, 0, module_data_name, 0)
324 #define _PAM_LOG_STATE_DATA_STRING(ctx, module_data_name) \
325 _pam_log_state_datum(ctx, 0, module_data_name, 1)
327 #define _PAM_LOG_STATE_ITEM_POINTER(ctx, item_type) \
328 _pam_log_state_datum(ctx, item_type, #item_type, 0)
330 #define _PAM_LOG_STATE_ITEM_STRING(ctx, item_type) \
331 _pam_log_state_datum(ctx, item_type, #item_type, 1)
333 #ifdef DEBUG_PASSWORD
334 #define _LOG_PASSWORD_AS_STRING 1
336 #define _LOG_PASSWORD_AS_STRING 0
339 #define _PAM_LOG_STATE_ITEM_PASSWORD(ctx, item_type) \
340 _pam_log_state_datum(ctx, item_type, #item_type, \
341 _LOG_PASSWORD_AS_STRING)
343 * wrapper to preserve old behaviour of iniparser which ignored
344 * key values that had no value assigned like
346 * for a key like above newer iniparser will return a zero-length
347 * string, previously iniparser would return NULL
349 static char *iniparser_getstring_nonempty(dictionary *d, char *key, char *def)
351 char *ret = iniparser_getstring(d, key, def);
352 if (ret && strlen(ret) == 0) {
358 static void _pam_log_state(struct pwb_context *ctx)
360 if (!ctx || !_pam_log_is_debug_state_enabled(ctx->ctrl)) {
364 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_SERVICE);
365 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER);
366 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_TTY);
367 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RHOST);
368 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RUSER);
369 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_OLDAUTHTOK);
370 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_AUTHTOK);
371 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER_PROMPT);
372 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_CONV);
373 #ifdef PAM_FAIL_DELAY
374 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_FAIL_DELAY);
376 #ifdef PAM_REPOSITORY
377 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_REPOSITORY);
380 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_HOMEDIR);
381 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSCRIPT);
382 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSERVER);
383 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_PROFILEPATH);
384 _PAM_LOG_STATE_DATA_STRING(ctx,
385 PAM_WINBIND_NEW_AUTHTOK_REQD);
386 /* Use atoi to get PAM result code */
387 _PAM_LOG_STATE_DATA_STRING(ctx,
388 PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
389 _PAM_LOG_STATE_DATA_POINTER(ctx, PAM_WINBIND_PWD_LAST_SET);
392 static int _pam_parse(const pam_handle_t *pamh,
396 enum pam_winbind_request_type type,
397 dictionary **result_d)
400 const char *config_file = NULL;
403 dictionary *d = NULL;
405 if (flags & PAM_SILENT) {
406 ctrl |= WINBIND_SILENT;
409 for (i=argc,v=argv; i-- > 0; ++v) {
410 if (!strncasecmp(*v, "config", strlen("config"))) {
411 ctrl |= WINBIND_CONFIG_FILE;
417 if (config_file == NULL) {
418 config_file = PAM_WINBIND_CONFIG_FILE;
421 d = iniparser_load(discard_const_p(char, config_file));
423 goto config_from_pam;
426 if (iniparser_getboolean(d, discard_const_p(char, "global:debug"), false)) {
427 ctrl |= WINBIND_DEBUG_ARG;
430 if (iniparser_getboolean(d, discard_const_p(char, "global:debug_state"), false)) {
431 ctrl |= WINBIND_DEBUG_STATE;
434 if (iniparser_getboolean(d, discard_const_p(char, "global:cached_login"), false)) {
435 ctrl |= WINBIND_CACHED_LOGIN;
438 if (iniparser_getboolean(d, discard_const_p(char, "global:krb5_auth"), false)) {
439 ctrl |= WINBIND_KRB5_AUTH;
442 if (iniparser_getboolean(d, discard_const_p(char, "global:silent"), false)) {
443 ctrl |= WINBIND_SILENT;
446 if (iniparser_getstring_nonempty(d, discard_const_p(char, "global:krb5_ccache_type"), NULL) != NULL) {
447 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
450 if ((iniparser_getstring_nonempty(d, discard_const_p(char, "global:require-membership-of"), NULL)
452 (iniparser_getstring_nonempty(d, discard_const_p(char, "global:require_membership_of"), NULL)
454 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
457 if (iniparser_getboolean(d, discard_const_p(char, "global:try_first_pass"), false)) {
458 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
461 if (iniparser_getint(d, discard_const_p(char, "global:warn_pwd_expire"), 0)) {
462 ctrl |= WINBIND_WARN_PWD_EXPIRE;
465 if (iniparser_getboolean(d, discard_const_p(char, "global:mkhomedir"), false)) {
466 ctrl |= WINBIND_MKHOMEDIR;
470 /* step through arguments */
471 for (i=argc,v=argv; i-- > 0; ++v) {
473 /* generic options */
474 if (!strcmp(*v,"debug"))
475 ctrl |= WINBIND_DEBUG_ARG;
476 else if (!strcasecmp(*v, "debug_state"))
477 ctrl |= WINBIND_DEBUG_STATE;
478 else if (!strcasecmp(*v, "silent"))
479 ctrl |= WINBIND_SILENT;
480 else if (!strcasecmp(*v, "use_authtok"))
481 ctrl |= WINBIND_USE_AUTHTOK_ARG;
482 else if (!strcasecmp(*v, "use_first_pass"))
483 ctrl |= WINBIND_USE_FIRST_PASS_ARG;
484 else if (!strcasecmp(*v, "try_first_pass"))
485 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
486 else if (!strcasecmp(*v, "unknown_ok"))
487 ctrl |= WINBIND_UNKNOWN_OK_ARG;
488 else if ((type == PAM_WINBIND_AUTHENTICATE
489 || type == PAM_WINBIND_SETCRED)
490 && !strncasecmp(*v, "require_membership_of",
491 strlen("require_membership_of")))
492 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
493 else if ((type == PAM_WINBIND_AUTHENTICATE
494 || type == PAM_WINBIND_SETCRED)
495 && !strncasecmp(*v, "require-membership-of",
496 strlen("require-membership-of")))
497 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
498 else if (!strcasecmp(*v, "krb5_auth"))
499 ctrl |= WINBIND_KRB5_AUTH;
500 else if (!strncasecmp(*v, "krb5_ccache_type",
501 strlen("krb5_ccache_type")))
502 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
503 else if (!strcasecmp(*v, "cached_login"))
504 ctrl |= WINBIND_CACHED_LOGIN;
505 else if (!strcasecmp(*v, "mkhomedir"))
506 ctrl |= WINBIND_MKHOMEDIR;
507 else if (type != PAM_WINBIND_CLEANUP) {
508 __pam_log(pamh, ctrl, LOG_ERR,
509 "pam_parse: unknown option: %s", *v);
519 iniparser_freedict(d);
526 static int _pam_winbind_free_context(struct pwb_context *ctx)
533 iniparser_freedict(ctx->dict);
539 static int _pam_winbind_init_context(pam_handle_t *pamh,
543 enum pam_winbind_request_type type,
544 struct pwb_context **ctx_p)
546 struct pwb_context *r = NULL;
552 r = talloc_zero(NULL, struct pwb_context);
557 talloc_set_destructor(r, _pam_winbind_free_context);
563 r->ctrl = _pam_parse(pamh, flags, argc, argv, type, &r->dict);
566 return PAM_SYSTEM_ERR;
574 static void _pam_winbind_cleanup_func(pam_handle_t *pamh,
578 int ctrl = _pam_parse(pamh, 0, 0, NULL, PAM_WINBIND_CLEANUP, NULL);
579 if (_pam_log_is_debug_state_enabled(ctrl)) {
580 __pam_log_debug(pamh, ctrl, LOG_DEBUG,
581 "[pamh: %p] CLEAN: cleaning up PAM data %p "
582 "(error_status = %d)", pamh, data,
589 static const struct ntstatus_errors {
590 const char *ntstatus_string;
591 const char *error_string;
592 } ntstatus_errors[] = {
595 {"NT_STATUS_BACKUP_CONTROLLER",
596 N_("No primary Domain Controler available")},
597 {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
598 N_("No domain controllers found")},
599 {"NT_STATUS_NO_LOGON_SERVERS",
600 N_("No logon servers")},
601 {"NT_STATUS_PWD_TOO_SHORT",
602 N_("Password too short")},
603 {"NT_STATUS_PWD_TOO_RECENT",
604 N_("The password of this user is too recent to change")},
605 {"NT_STATUS_PWD_HISTORY_CONFLICT",
606 N_("Password is already in password history")},
607 {"NT_STATUS_PASSWORD_EXPIRED",
608 N_("Your password has expired")},
609 {"NT_STATUS_PASSWORD_MUST_CHANGE",
610 N_("You need to change your password now")},
611 {"NT_STATUS_INVALID_WORKSTATION",
612 N_("You are not allowed to logon from this workstation")},
613 {"NT_STATUS_INVALID_LOGON_HOURS",
614 N_("You are not allowed to logon at this time")},
615 {"NT_STATUS_ACCOUNT_EXPIRED",
616 N_("Your account has expired. "
617 "Please contact your System administrator")}, /* SCNR */
618 {"NT_STATUS_ACCOUNT_DISABLED",
619 N_("Your account is disabled. "
620 "Please contact your System administrator")}, /* SCNR */
621 {"NT_STATUS_ACCOUNT_LOCKED_OUT",
622 N_("Your account has been locked. "
623 "Please contact your System administrator")}, /* SCNR */
624 {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
625 N_("Invalid Trust Account")},
626 {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
627 N_("Invalid Trust Account")},
628 {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
629 N_("Invalid Trust Account")},
630 {"NT_STATUS_ACCESS_DENIED",
631 N_("Access is denied")},
635 static const char *_get_ntstatus_error_string(const char *nt_status_string)
638 for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
639 if (!strcasecmp(ntstatus_errors[i].ntstatus_string,
641 return _(ntstatus_errors[i].error_string);
647 /* --- authentication management functions --- */
649 /* Attempt a conversation */
651 static int converse(const pam_handle_t *pamh,
653 struct pam_message **message,
654 struct pam_response **response)
657 struct pam_conv *conv;
659 retval = pam_get_item(pamh, PAM_CONV, (const void **) &conv);
660 if (retval == PAM_SUCCESS) {
661 retval = conv->conv(nargs,
662 (const struct pam_message **)message,
663 response, conv->appdata_ptr);
666 return retval; /* propagate error status */
670 static int _make_remark(struct pwb_context *ctx,
674 int retval = PAM_SUCCESS;
676 struct pam_message *pmsg[1], msg[1];
677 struct pam_response *resp;
679 if (ctx->flags & WINBIND_SILENT) {
684 msg[0].msg = discard_const_p(char, text);
685 msg[0].msg_style = type;
688 retval = converse(ctx->pamh, 1, pmsg, &resp);
691 _pam_drop_reply(resp, 1);
696 static int _make_remark_v(struct pwb_context *ctx,
704 ret = vasprintf(&var, format, args);
706 _pam_log(ctx, LOG_ERR, "memory allocation failure");
710 ret = _make_remark(ctx, type, var);
715 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
716 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...)
721 va_start(args, format);
722 ret = _make_remark_v(ctx, type, format, args);
727 static int pam_winbind_request_log(struct pwb_context *ctx,
734 /* incorrect password */
735 _pam_log(ctx, LOG_WARNING, "user '%s' denied access "
736 "(incorrect password or invalid membership)", user);
738 case PAM_ACCT_EXPIRED:
739 /* account expired */
740 _pam_log(ctx, LOG_WARNING, "user '%s' account expired",
743 case PAM_AUTHTOK_EXPIRED:
744 /* password expired */
745 _pam_log(ctx, LOG_WARNING, "user '%s' password expired",
748 case PAM_NEW_AUTHTOK_REQD:
749 /* new password required */
750 _pam_log(ctx, LOG_WARNING, "user '%s' new password "
753 case PAM_USER_UNKNOWN:
754 /* the user does not exist */
755 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
757 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
762 /* Otherwise, the authentication looked good */
763 if (strcmp(fn, "wbcLogonUser") == 0) {
764 _pam_log(ctx, LOG_NOTICE,
765 "user '%s' granted access", user);
767 _pam_log(ctx, LOG_NOTICE,
768 "user '%s' OK", user);
772 /* we don't know anything about this return value */
773 _pam_log(ctx, LOG_ERR,
774 "internal module error (retval = %s(%d), user = '%s')",
775 _pam_error_code_str(retval), retval, user);
780 static int wbc_auth_error_to_pam_error(struct pwb_context *ctx,
781 struct wbcAuthErrorInfo *e,
783 const char *username,
786 int ret = PAM_AUTH_ERR;
788 if (WBC_ERROR_IS_OK(status)) {
789 _pam_log_debug(ctx, LOG_DEBUG, "request %s succeeded",
792 return pam_winbind_request_log(ctx, ret, username, fn);
796 if (e->pam_error != PAM_SUCCESS) {
797 _pam_log(ctx, LOG_ERR,
798 "request %s failed: %s, "
799 "PAM error: %s (%d), NTSTATUS: %s, "
800 "Error message was: %s",
802 wbcErrorString(status),
803 _pam_error_code_str(e->pam_error),
808 return pam_winbind_request_log(ctx, ret, username, fn);
811 _pam_log(ctx, LOG_ERR, "request %s failed, but PAM error 0!", fn);
813 ret = PAM_SERVICE_ERR;
814 return pam_winbind_request_log(ctx, ret, username, fn);
817 ret = wbc_error_to_pam_error(status);
818 return pam_winbind_request_log(ctx, ret, username, fn);
821 #if defined(HAVE_PAM_RADIO_TYPE)
822 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
824 struct pam_message msg, *pmsg;
825 struct pam_response *resp = NULL;
829 msg.msg_style = PAM_RADIO_TYPE;
830 msg.msg = _("Do you want to change your password now?");
831 ret = converse(ctx->pamh, 1, &pmsg, &resp);
833 if (ret == PAM_SUCCESS) {
834 _pam_log(ctx, LOG_CRIT, "pam_winbind: system error!\n");
838 if (ret != PAM_SUCCESS) {
841 _pam_log(ctx, LOG_CRIT, "Received [%s] reply from application.\n", resp->resp);
843 if ((resp->resp != NULL) && (strcasecmp(resp->resp, "yes") == 0)) {
847 _pam_drop_reply(resp, 1);
851 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
858 * send a password expiry message if required
860 * @param ctx PAM winbind context.
861 * @param next_change expected (calculated) next expiry date.
862 * @param already_expired pointer to a boolean to indicate if the password is
865 * @return boolean Returns true if message has been sent, false if not.
868 static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
872 bool *already_expired,
876 struct tm tm_now, tm_next_change;
880 if (already_expired) {
881 *already_expired = false;
888 if (next_change <= now) {
889 PAM_WB_REMARK_DIRECT(ctx, "NT_STATUS_PASSWORD_EXPIRED");
890 if (already_expired) {
891 *already_expired = true;
896 if ((next_change < 0) ||
897 (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
901 if ((localtime_r(&now, &tm_now) == NULL) ||
902 (localtime_r(&next_change, &tm_next_change) == NULL)) {
906 days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) -
907 (tm_now.tm_yday+tm_now.tm_year*365);
910 ret = _make_remark(ctx, PAM_TEXT_INFO,
911 _("Your password expires today.\n"));
914 * If change_pwd and already_expired is null.
915 * We are just sending a notification message.
916 * We don't expect any response in this case.
919 if (!change_pwd && !already_expired) {
924 * successfully sent the warning message.
925 * Give the user a chance to change pwd.
927 if (ret == PAM_SUCCESS) {
929 retval = _pam_winbind_change_pwd(ctx);
938 if (days > 0 && days < warn_pwd_expire) {
940 ret = _make_remark_format(ctx, PAM_TEXT_INFO,
941 _("Your password will expire in %d %s.\n"),
942 days, (days > 1) ? _("days"):_("day"));
944 * If change_pwd and already_expired is null.
945 * We are just sending a notification message.
946 * We don't expect any response in this case.
949 if (!change_pwd && !already_expired) {
954 * successfully sent the warning message.
955 * Give the user a chance to change pwd.
957 if (ret == PAM_SUCCESS) {
959 retval = _pam_winbind_change_pwd(ctx);
972 * Send a warning if the password expires in the near future
974 * @param ctx PAM winbind context.
975 * @param response The full authentication response structure.
976 * @param already_expired boolean, is the pwd already expired?
981 static void _pam_warn_password_expiry(struct pwb_context *ctx,
982 const struct wbcAuthUserInfo *info,
983 const struct wbcUserPasswordPolicyInfo *policy,
985 bool *already_expired,
988 time_t now = time(NULL);
989 time_t next_change = 0;
991 if (!info || !policy) {
995 if (already_expired) {
996 *already_expired = false;
1000 *change_pwd = false;
1003 /* accounts with WBC_ACB_PWNOEXP set never receive a warning */
1004 if (info->acct_flags & WBC_ACB_PWNOEXP) {
1008 /* no point in sending a warning if this is a grace logon */
1009 if (PAM_WB_GRACE_LOGON(info->user_flags)) {
1013 /* check if the info3 must change timestamp has been set */
1014 next_change = info->pass_must_change_time;
1016 if (_pam_send_password_expiry_message(ctx, next_change, now,
1023 /* now check for the global password policy */
1024 /* good catch from Ralf Haferkamp: an expiry of "never" is translated
1026 if ((policy->expire == (int64_t)-1) ||
1027 (policy->expire == 0)) {
1031 next_change = info->pass_last_set_time + policy->expire;
1033 if (_pam_send_password_expiry_message(ctx, next_change, now,
1040 /* no warning sent */
1043 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
1046 * Append a string, making sure not to overflow and to always return a
1047 * NULL-terminated string.
1049 * @param dest Destination string buffer (must already be NULL-terminated).
1050 * @param src Source string buffer.
1051 * @param dest_buffer_size Size of dest buffer in bytes.
1053 * @return false if dest buffer is not big enough (no bytes copied), true on
1057 static bool safe_append_string(char *dest,
1059 int dest_buffer_size)
1062 len = strlcat(dest, src, dest_buffer_size);
1063 return (len < dest_buffer_size);
1067 * Convert a names into a SID string, appending it to a buffer.
1069 * @param ctx PAM winbind context.
1070 * @param user User in PAM request.
1071 * @param name Name to convert.
1072 * @param sid_list_buffer Where to append the string sid.
1073 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1075 * @return false on failure, true on success.
1077 static bool winbind_name_to_sid_string(struct pwb_context *ctx,
1080 char *sid_list_buffer,
1081 int sid_list_buffer_size)
1083 char sid_string[WBC_SID_STRING_BUFLEN];
1086 if (IS_SID_STRING(name)) {
1087 strlcpy(sid_string, name, sizeof(sid_string));
1090 struct wbcDomainSid sid;
1091 enum wbcSidType type;
1093 _pam_log_debug(ctx, LOG_DEBUG,
1094 "no sid given, looking up: %s\n", name);
1096 wbc_status = wbcLookupName("", name, &sid, &type);
1097 if (!WBC_ERROR_IS_OK(wbc_status)) {
1098 _pam_log(ctx, LOG_INFO,
1099 "could not lookup name: %s\n", name);
1103 wbcSidToStringBuf(&sid, sid_string, sizeof(sid_string));
1106 if (!safe_append_string(sid_list_buffer, sid_string,
1107 sid_list_buffer_size)) {
1114 * Convert a list of names into a list of sids.
1116 * @param ctx PAM winbind context.
1117 * @param user User in PAM request.
1118 * @param name_list List of names or string sids, separated by commas.
1119 * @param sid_list_buffer Where to put the list of string sids.
1120 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1122 * @return false on failure, true on success.
1124 static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
1126 const char *name_list,
1127 char *sid_list_buffer,
1128 int sid_list_buffer_size)
1130 bool result = false;
1131 char *current_name = NULL;
1132 const char *search_location;
1136 if (sid_list_buffer_size > 0) {
1137 sid_list_buffer[0] = 0;
1140 search_location = name_list;
1141 while ((comma = strchr(search_location, ',')) != NULL) {
1142 current_name = strndup(search_location,
1143 comma - search_location);
1144 if (NULL == current_name) {
1148 if (!winbind_name_to_sid_string(ctx, user,
1151 sid_list_buffer_size)) {
1153 * If one group name failed, we must not fail
1154 * the authentication totally, continue with
1155 * the following group names. If user belongs to
1156 * one of the valid groups, we must allow it
1160 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1161 "check if group %s is valid group.", current_name,
1163 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1164 "to sid, please contact your administrator to see "
1165 "if group %s is valid."), current_name, current_name);
1166 SAFE_FREE(current_name);
1167 search_location = comma + 1;
1171 SAFE_FREE(current_name);
1173 if (!safe_append_string(sid_list_buffer, ",",
1174 sid_list_buffer_size)) {
1178 search_location = comma + 1;
1181 if (!winbind_name_to_sid_string(ctx, user, search_location,
1183 sid_list_buffer_size)) {
1184 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1185 "check if group %s is valid group.", search_location,
1187 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1188 "to sid, please contact your administrator to see "
1189 "if group %s is valid."), search_location, search_location);
1191 /* If no valid groups were converted we should fail outright */
1192 if (name_list != NULL && strlen(sid_list_buffer) == 0) {
1197 * The lookup of the last name failed..
1198 * It results in require_member_of_sid ends with ','
1199 * It is malformated parameter here, overwrite the last ','.
1201 len = strlen(sid_list_buffer);
1202 if ((len != 0) && (sid_list_buffer[len - 1] == ',')) {
1203 sid_list_buffer[len - 1] = '\0';
1210 SAFE_FREE(current_name);
1215 * put krb5ccname variable into environment
1217 * @param ctx PAM winbind context.
1218 * @param krb5ccname env variable retrieved from winbindd.
1223 static void _pam_setup_krb5_env(struct pwb_context *ctx,
1224 struct wbcLogonUserInfo *info)
1229 const char *krb5ccname = NULL;
1231 if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
1239 for (i=0; i < info->num_blobs; i++) {
1240 if (strcasecmp(info->blobs[i].name, "krb5ccname") == 0) {
1241 krb5ccname = (const char *)info->blobs[i].blob.data;
1246 if (!krb5ccname || (strlen(krb5ccname) == 0)) {
1250 _pam_log_debug(ctx, LOG_DEBUG,
1251 "request returned KRB5CCNAME: %s", krb5ccname);
1253 if (asprintf(&var, "KRB5CCNAME=%s", krb5ccname) == -1) {
1257 ret = pam_putenv(ctx->pamh, var);
1259 _pam_log(ctx, LOG_ERR,
1260 "failed to set KRB5CCNAME to %s: %s",
1261 var, pam_strerror(ctx->pamh, ret));
1267 * Copy unix username if available (further processed in PAM).
1269 * @param ctx PAM winbind context
1270 * @param user_ret A pointer that holds a pointer to a string
1271 * @param unix_username A username
1276 static void _pam_setup_unix_username(struct pwb_context *ctx,
1278 struct wbcLogonUserInfo *info)
1280 const char *unix_username = NULL;
1283 if (!user_ret || !info) {
1287 for (i=0; i < info->num_blobs; i++) {
1288 if (strcasecmp(info->blobs[i].name, "unix_username") == 0) {
1289 unix_username = (const char *)info->blobs[i].blob.data;
1294 if (!unix_username || !unix_username[0]) {
1298 *user_ret = strdup(unix_username);
1302 * Set string into the PAM stack.
1304 * @param ctx PAM winbind context.
1305 * @param data_name Key name for pam_set_data.
1306 * @param value String value.
1311 static void _pam_set_data_string(struct pwb_context *ctx,
1312 const char *data_name,
1317 if (!data_name || !value || (strlen(data_name) == 0) ||
1318 (strlen(value) == 0)) {
1322 ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
1323 _pam_winbind_cleanup_func);
1325 _pam_log_debug(ctx, LOG_DEBUG,
1326 "Could not set data %s: %s\n",
1327 data_name, pam_strerror(ctx->pamh, ret));
1332 * Set info3 strings into the PAM stack.
1334 * @param ctx PAM winbind context.
1335 * @param data_name Key name for pam_set_data.
1336 * @param value String value.
1341 static void _pam_set_data_info3(struct pwb_context *ctx,
1342 const struct wbcAuthUserInfo *info)
1344 _pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
1345 info->home_directory);
1346 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
1347 info->logon_script);
1348 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
1349 info->logon_server);
1350 _pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
1351 info->profile_path);
1355 * Free info3 strings in the PAM stack.
1357 * @param pamh PAM handle
1362 static void _pam_free_data_info3(pam_handle_t *pamh)
1364 pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1365 pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1366 pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1367 pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1371 * Send PAM_ERROR_MSG for cached or grace logons.
1373 * @param ctx PAM winbind context.
1374 * @param username User in PAM request.
1375 * @param info3_user_flgs Info3 flags containing logon type bits.
1380 static void _pam_warn_logon_type(struct pwb_context *ctx,
1381 const char *username,
1382 uint32_t info3_user_flgs)
1384 /* inform about logon type */
1385 if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1387 _make_remark(ctx, PAM_ERROR_MSG,
1389 "Please change your password as soon you're "
1391 _pam_log_debug(ctx, LOG_DEBUG,
1392 "User %s logged on using grace logon\n",
1395 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1397 _make_remark(ctx, PAM_ERROR_MSG,
1398 _("Domain Controller unreachable, "
1399 "using cached credentials instead. "
1400 "Network resources may be unavailable"));
1401 _pam_log_debug(ctx, LOG_DEBUG,
1402 "User %s logged on using cached credentials\n",
1408 * Send PAM_ERROR_MSG for krb5 errors.
1410 * @param ctx PAM winbind context.
1411 * @param username User in PAM request.
1412 * @param info3_user_flgs Info3 flags containing logon type bits.
1417 static void _pam_warn_krb5_failure(struct pwb_context *ctx,
1418 const char *username,
1419 uint32_t info3_user_flgs)
1421 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1422 _make_remark(ctx, PAM_ERROR_MSG,
1423 _("Failed to establish your Kerberos Ticket cache "
1424 "due time differences\n"
1425 "with the domain controller. "
1426 "Please verify the system time.\n"));
1427 _pam_log_debug(ctx, LOG_DEBUG,
1428 "User %s: Clock skew when getting Krb5 TGT\n",
1433 static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
1434 const struct wbcAuthErrorInfo *e,
1435 const char *nt_status_string,
1438 const char *ntstatus = NULL;
1439 const char *error_string = NULL;
1441 if (!e || !pam_err) {
1445 ntstatus = e->nt_string;
1450 if (strcasecmp(ntstatus, nt_status_string) == 0) {
1452 error_string = _get_ntstatus_error_string(nt_status_string);
1454 _make_remark(ctx, PAM_ERROR_MSG, error_string);
1455 *pam_err = e->pam_error;
1459 if (e->display_string) {
1460 _make_remark(ctx, PAM_ERROR_MSG, _(e->display_string));
1461 *pam_err = e->pam_error;
1465 _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
1466 *pam_err = e->pam_error;
1475 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1477 * @param i The wbcUserPasswordPolicyInfo struct.
1479 * @return string (caller needs to talloc_free).
1482 static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
1483 struct wbcUserPasswordPolicyInfo *i)
1491 str = talloc_asprintf(ctx, _("Your password "));
1496 if (i->min_length_password > 0) {
1497 str = talloc_asprintf_append(str,
1498 _("must be at least %d characters; "),
1499 i->min_length_password);
1505 if (i->password_history > 0) {
1506 str = talloc_asprintf_append(str,
1507 _("cannot repeat any of your previous %d "
1509 i->password_history);
1515 if (i->password_properties & WBC_DOMAIN_PASSWORD_COMPLEX) {
1516 str = talloc_asprintf_append(str,
1517 _("must contain capitals, numerals "
1519 "and cannot contain your account "
1526 str = talloc_asprintf_append(str,
1527 _("Please type a different password. "
1528 "Type a password which meets these requirements in "
1529 "both text boxes."));
1541 static int _pam_create_homedir(struct pwb_context *ctx,
1542 const char *dirname,
1547 if (stat(dirname, &sbuf) == 0) {
1551 if (mkdir(dirname, mode) != 0) {
1553 _make_remark_format(ctx, PAM_TEXT_INFO,
1554 _("Creating directory: %s failed: %s"),
1555 dirname, strerror(errno));
1556 _pam_log(ctx, LOG_ERR, "could not create dir: %s (%s)",
1557 dirname, strerror(errno));
1558 return PAM_PERM_DENIED;
1564 static int _pam_chown_homedir(struct pwb_context *ctx,
1565 const char *dirname,
1569 if (chown(dirname, uid, gid) != 0) {
1570 _pam_log(ctx, LOG_ERR, "failed to chown user homedir: %s (%s)",
1571 dirname, strerror(errno));
1572 return PAM_PERM_DENIED;
1578 static int _pam_mkhomedir(struct pwb_context *ctx)
1580 struct passwd *pwd = NULL;
1582 char *create_dir = NULL;
1583 char *user_dir = NULL;
1585 const char *username;
1587 char *safe_ptr = NULL;
1590 /* Get the username */
1591 ret = pam_get_user(ctx->pamh, &username, NULL);
1592 if ((ret != PAM_SUCCESS) || (!username)) {
1593 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1594 return PAM_SERVICE_ERR;
1597 pwd = getpwnam(username);
1599 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1600 return PAM_USER_UNKNOWN;
1602 _pam_log_debug(ctx, LOG_DEBUG, "homedir is: %s", pwd->pw_dir);
1604 ret = _pam_create_homedir(ctx, pwd->pw_dir, 0700);
1605 if (ret == PAM_SUCCESS) {
1606 ret = _pam_chown_homedir(ctx, pwd->pw_dir,
1611 if (ret == PAM_SUCCESS) {
1615 /* maybe we need to create parent dirs */
1616 create_dir = talloc_strdup(ctx, "/");
1621 /* find final directory */
1622 user_dir = strrchr(pwd->pw_dir, '/');
1628 _pam_log(ctx, LOG_DEBUG, "final directory: %s", user_dir);
1632 while ((token = strtok_r(p, "/", &safe_ptr)) != NULL) {
1638 _pam_log_debug(ctx, LOG_DEBUG, "token is %s", token);
1640 create_dir = talloc_asprintf_append(create_dir, "%s/", token);
1644 _pam_log_debug(ctx, LOG_DEBUG, "current_dir is %s", create_dir);
1646 if (strcmp(token, user_dir) == 0) {
1647 _pam_log_debug(ctx, LOG_DEBUG, "assuming last directory: %s", token);
1651 ret = _pam_create_homedir(ctx, create_dir, mode);
1657 return _pam_chown_homedir(ctx, create_dir,
1662 /* talk to winbindd */
1663 static int winbind_auth_request(struct pwb_context *ctx,
1668 const int warn_pwd_expire,
1669 struct wbcAuthErrorInfo **p_error,
1670 struct wbcLogonUserInfo **p_info,
1671 struct wbcUserPasswordPolicyInfo **p_policy,
1672 time_t *pwd_last_set,
1677 struct wbcLogonUserParams logon;
1678 char membership_of[1024];
1679 uid_t user_uid = -1;
1680 uint32_t flags = WBFLAG_PAM_INFO3_TEXT |
1681 WBFLAG_PAM_GET_PWD_POLICY;
1683 struct wbcLogonUserInfo *info = NULL;
1684 struct wbcAuthUserInfo *user_info = NULL;
1685 struct wbcAuthErrorInfo *error = NULL;
1686 struct wbcUserPasswordPolicyInfo *policy = NULL;
1688 int ret = PAM_AUTH_ERR;
1690 const char *codes[] = {
1691 "NT_STATUS_PASSWORD_EXPIRED",
1692 "NT_STATUS_PASSWORD_MUST_CHANGE",
1693 "NT_STATUS_INVALID_WORKSTATION",
1694 "NT_STATUS_INVALID_LOGON_HOURS",
1695 "NT_STATUS_ACCOUNT_EXPIRED",
1696 "NT_STATUS_ACCOUNT_DISABLED",
1697 "NT_STATUS_ACCOUNT_LOCKED_OUT",
1698 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1699 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1700 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1701 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1702 "NT_STATUS_NO_LOGON_SERVERS",
1703 "NT_STATUS_WRONG_PASSWORD",
1704 "NT_STATUS_ACCESS_DENIED"
1711 /* Krb5 auth always has to go against the KDC of the user's realm */
1713 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1714 flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
1717 if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1718 struct passwd *pwd = NULL;
1720 pwd = getpwnam(user);
1722 return PAM_USER_UNKNOWN;
1724 user_uid = pwd->pw_uid;
1727 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1729 _pam_log_debug(ctx, LOG_DEBUG,
1730 "enabling krb5 login flag\n");
1732 flags |= WBFLAG_PAM_KRB5 |
1733 WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1736 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1737 _pam_log_debug(ctx, LOG_DEBUG,
1738 "enabling cached login flag\n");
1739 flags |= WBFLAG_PAM_CACHED_LOGIN;
1744 flags |= WBFLAG_PAM_UNIX_NAME;
1747 if (cctype != NULL) {
1748 _pam_log_debug(ctx, LOG_DEBUG,
1749 "enabling request for a %s krb5 ccache\n",
1753 if (member != NULL) {
1755 ZERO_STRUCT(membership_of);
1757 if (!winbind_name_list_to_sid_string_list(ctx, user, member,
1759 sizeof(membership_of))) {
1760 _pam_log_debug(ctx, LOG_ERR,
1761 "failed to serialize membership of sid "
1762 "\"%s\"\n", member);
1763 return PAM_AUTH_ERR;
1769 logon.username = user;
1770 logon.password = pass;
1773 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1777 discard_const_p(uint8_t, cctype),
1779 if (!WBC_ERROR_IS_OK(wbc_status)) {
1784 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1790 if (!WBC_ERROR_IS_OK(wbc_status)) {
1794 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1798 (uint8_t *)&user_uid,
1800 if (!WBC_ERROR_IS_OK(wbc_status)) {
1805 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1809 (uint8_t *)membership_of,
1810 sizeof(membership_of));
1811 if (!WBC_ERROR_IS_OK(wbc_status)) {
1816 wbc_status = wbcLogonUser(&logon, &info, &error, &policy);
1817 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1818 user, "wbcLogonUser");
1819 wbcFreeMemory(logon.blobs);
1822 if (info && info->info) {
1823 user_info = info->info;
1826 if (pwd_last_set && user_info) {
1827 *pwd_last_set = user_info->pass_last_set_time;
1830 if (p_info && info) {
1834 if (p_policy && policy) {
1838 if (p_error && error) {
1839 /* We want to process the error in the caller. */
1844 for (i=0; i<ARRAY_SIZE(codes); i++) {
1846 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1852 if ((ret == PAM_SUCCESS) && user_info && policy && info) {
1854 bool already_expired = false;
1855 bool change_pwd = false;
1857 /* warn a user if the password is about to expire soon */
1858 _pam_warn_password_expiry(ctx, user_info, policy,
1863 if (already_expired == true) {
1865 SMB_TIME_T last_set = user_info->pass_last_set_time;
1867 _pam_log_debug(ctx, LOG_DEBUG,
1868 "Password has expired "
1869 "(Password was last set: %lld, "
1870 "the policy says it should expire here "
1871 "%lld (now it's: %ld))\n",
1872 (long long int)last_set,
1873 (long long int)last_set +
1877 return PAM_AUTHTOK_EXPIRED;
1881 ret = PAM_NEW_AUTHTOK_REQD;
1885 /* inform about logon type */
1886 _pam_warn_logon_type(ctx, user, user_info->user_flags);
1888 /* inform about krb5 failures */
1889 _pam_warn_krb5_failure(ctx, user, user_info->user_flags);
1891 /* set some info3 info for other modules in the stack */
1892 _pam_set_data_info3(ctx, user_info);
1894 /* put krb5ccname into env */
1895 _pam_setup_krb5_env(ctx, info);
1897 /* If winbindd returned a username, return the pointer to it
1899 _pam_setup_unix_username(ctx, user_ret, info);
1903 wbcFreeMemory(logon.blobs);
1904 if (info && info->blobs && !p_info) {
1905 wbcFreeMemory(info->blobs);
1907 if (error && !p_error) {
1908 wbcFreeMemory(error);
1910 if (info && !p_info) {
1911 wbcFreeMemory(info);
1913 if (policy && !p_policy) {
1914 wbcFreeMemory(policy);
1920 /* talk to winbindd */
1921 static int winbind_chauthtok_request(struct pwb_context *ctx,
1923 const char *oldpass,
1924 const char *newpass,
1925 time_t pwd_last_set)
1928 struct wbcChangePasswordParams params;
1929 struct wbcAuthErrorInfo *error = NULL;
1930 struct wbcUserPasswordPolicyInfo *policy = NULL;
1931 enum wbcPasswordChangeRejectReason reject_reason = -1;
1935 const char *codes[] = {
1936 "NT_STATUS_BACKUP_CONTROLLER",
1937 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1938 "NT_STATUS_NO_LOGON_SERVERS",
1939 "NT_STATUS_ACCESS_DENIED",
1940 "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1941 "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1942 "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1944 int ret = PAM_AUTH_ERR;
1946 ZERO_STRUCT(params);
1948 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1949 flags |= WBFLAG_PAM_KRB5 |
1950 WBFLAG_PAM_CONTACT_TRUSTDOM;
1953 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1954 flags |= WBFLAG_PAM_CACHED_LOGIN;
1957 params.account_name = user;
1958 params.level = WBC_CHANGE_PASSWORD_LEVEL_PLAIN;
1959 params.old_password.plaintext = oldpass;
1960 params.new_password.plaintext = newpass;
1961 params.flags = flags;
1963 wbc_status = wbcChangeUserPasswordEx(¶ms, &error, &reject_reason, &policy);
1964 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1965 user, "wbcChangeUserPasswordEx");
1967 if (WBC_ERROR_IS_OK(wbc_status)) {
1968 _pam_log(ctx, LOG_NOTICE,
1969 "user '%s' password changed", user);
1974 wbcFreeMemory(policy);
1978 for (i=0; i<ARRAY_SIZE(codes); i++) {
1980 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1986 if (!strcasecmp(error->nt_string,
1987 "NT_STATUS_PASSWORD_RESTRICTION")) {
1989 char *pwd_restriction_string = NULL;
1990 SMB_TIME_T min_pwd_age = 0;
1993 min_pwd_age = policy->min_passwordage;
1996 /* FIXME: avoid to send multiple PAM messages after another */
1997 switch (reject_reason) {
2000 case WBC_PWD_CHANGE_NO_ERROR:
2001 if ((min_pwd_age > 0) &&
2002 (pwd_last_set + min_pwd_age > time(NULL))) {
2003 PAM_WB_REMARK_DIRECT(ctx,
2004 "NT_STATUS_PWD_TOO_RECENT");
2007 case WBC_PWD_CHANGE_PASSWORD_TOO_SHORT:
2008 PAM_WB_REMARK_DIRECT(ctx,
2009 "NT_STATUS_PWD_TOO_SHORT");
2011 case WBC_PWD_CHANGE_PWD_IN_HISTORY:
2012 PAM_WB_REMARK_DIRECT(ctx,
2013 "NT_STATUS_PWD_HISTORY_CONFLICT");
2015 case WBC_PWD_CHANGE_NOT_COMPLEX:
2016 _make_remark(ctx, PAM_ERROR_MSG,
2017 _("Password does not meet "
2018 "complexity requirements"));
2021 _pam_log_debug(ctx, LOG_DEBUG,
2022 "unknown password change "
2023 "reject reason: %d",
2028 pwd_restriction_string =
2029 _pam_compose_pwd_restriction_string(ctx, policy);
2030 if (pwd_restriction_string) {
2031 _make_remark(ctx, PAM_ERROR_MSG,
2032 pwd_restriction_string);
2033 TALLOC_FREE(pwd_restriction_string);
2037 wbcFreeMemory(error);
2038 wbcFreeMemory(policy);
2044 * Checks if a user has an account
2047 * 1 = User not found
2051 static int valid_user(struct pwb_context *ctx,
2054 /* check not only if the user is available over NSS calls, also make
2055 * sure it's really a winbind user, this is important when stacking PAM
2056 * modules in the 'account' or 'password' facility. */
2059 struct passwd *pwd = NULL;
2060 struct passwd *wb_pwd = NULL;
2062 pwd = getpwnam(user);
2067 wbc_status = wbcGetpwnam(user, &wb_pwd);
2068 wbcFreeMemory(wb_pwd);
2069 if (!WBC_ERROR_IS_OK(wbc_status)) {
2070 _pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
2071 wbcErrorString(wbc_status));
2074 switch (wbc_status) {
2075 case WBC_ERR_UNKNOWN_USER:
2076 /* match other insane libwbclient return codes */
2077 case WBC_ERR_WINBIND_NOT_AVAILABLE:
2078 case WBC_ERR_DOMAIN_NOT_FOUND:
2080 case WBC_ERR_SUCCESS:
2088 static char *_pam_delete(register char *xx)
2096 * obtain a password from the user
2099 static int _winbind_read_password(struct pwb_context *ctx,
2101 const char *comment,
2102 const char *prompt1,
2103 const char *prompt2,
2111 _pam_log(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
2114 * make sure nothing inappropriate gets returned
2117 *pass = token = NULL;
2120 * which authentication token are we getting?
2123 if (on(WINBIND__OLD_PASSWORD, ctrl)) {
2124 authtok_flag = PAM_OLDAUTHTOK;
2126 authtok_flag = PAM_AUTHTOK;
2130 * should we obtain the password from a PAM item ?
2133 if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
2134 on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2135 retval = pam_get_item(ctx->pamh,
2137 (const void **) &item);
2138 if (retval != PAM_SUCCESS) {
2140 _pam_log(ctx, LOG_ALERT,
2141 "pam_get_item returned error "
2142 "to unix-read-password");
2144 } else if (item != NULL) { /* we have a password! */
2147 _pam_log(ctx, LOG_DEBUG,
2148 "pam_get_item returned a password");
2150 } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2151 return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
2152 } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
2153 && off(WINBIND__OLD_PASSWORD, ctrl)) {
2154 return PAM_AUTHTOK_RECOVER_ERR;
2158 * getting here implies we will have to get the password from the
2163 struct pam_message msg[3], *pmsg[3];
2164 struct pam_response *resp;
2167 /* prepare to converse */
2169 if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
2171 msg[0].msg_style = PAM_TEXT_INFO;
2172 msg[0].msg = discard_const_p(char, comment);
2179 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2180 msg[i++].msg = discard_const_p(char, prompt1);
2183 if (prompt2 != NULL) {
2185 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2186 msg[i++].msg = discard_const_p(char, prompt2);
2189 /* so call the conversation expecting i responses */
2191 retval = converse(ctx->pamh, i, pmsg, &resp);
2193 if (retval == PAM_SUCCESS) {
2194 retval = PAM_AUTHTOK_RECOVER_ERR;
2198 if (retval != PAM_SUCCESS) {
2199 _pam_drop_reply(resp, i);
2203 /* interpret the response */
2205 token = x_strdup(resp[i - replies].resp);
2207 _pam_log(ctx, LOG_NOTICE,
2208 "could not recover "
2209 "authentication token");
2210 retval = PAM_AUTHTOK_RECOVER_ERR;
2215 /* verify that password entered correctly */
2216 if (!resp[i - 1].resp ||
2217 strcmp(token, resp[i - 1].resp)) {
2218 _pam_delete(token); /* mistyped */
2219 retval = PAM_AUTHTOK_RECOVER_ERR;
2220 _make_remark(ctx, PAM_ERROR_MSG,
2226 * tidy up the conversation (resp_retcode) is ignored
2227 * -- what is it for anyway? AGM
2229 _pam_drop_reply(resp, i);
2233 if (retval != PAM_SUCCESS) {
2234 _pam_log_debug(ctx, LOG_DEBUG,
2235 "unable to obtain a password");
2238 /* 'token' is the entered password */
2240 /* we store this password as an item */
2242 retval = pam_set_item(ctx->pamh, authtok_flag, token);
2243 _pam_delete(token); /* clean it up */
2244 if (retval != PAM_SUCCESS ||
2245 (retval = pam_get_item(ctx->pamh, authtok_flag, (const void **) &item)) != PAM_SUCCESS) {
2247 _pam_log(ctx, LOG_CRIT, "error manipulating password");
2253 item = NULL; /* break link to password */
2258 static const char *get_conf_item_string(struct pwb_context *ctx,
2263 const char *parm_opt = NULL;
2265 if (!(ctx->ctrl & config_flag)) {
2269 /* let the pam opt take precedence over the pam_winbind.conf option */
2270 for (i=0; i<ctx->argc; i++) {
2272 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2275 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2276 _pam_log(ctx, LOG_INFO,
2277 "no \"=\" delimiter for \"%s\" found\n",
2281 _pam_log_debug(ctx, LOG_INFO,
2282 "PAM config: %s '%s'\n", item, p+1);
2290 key = talloc_asprintf(ctx, "global:%s", item);
2295 parm_opt = iniparser_getstring_nonempty(ctx->dict, key, NULL);
2298 _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
2305 static int get_config_item_int(struct pwb_context *ctx,
2309 int i, parm_opt = -1;
2311 if (!(ctx->ctrl & config_flag)) {
2315 /* let the pam opt take precedence over the pam_winbind.conf option */
2316 for (i = 0; i < ctx->argc; i++) {
2318 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2321 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2322 _pam_log(ctx, LOG_INFO,
2323 "no \"=\" delimiter for \"%s\" found\n",
2327 parm_opt = atoi(p + 1);
2328 _pam_log_debug(ctx, LOG_INFO,
2329 "PAM config: %s '%d'\n",
2338 key = talloc_asprintf(ctx, "global:%s", item);
2343 parm_opt = iniparser_getint(ctx->dict, key, -1);
2346 _pam_log_debug(ctx, LOG_INFO,
2347 "CONFIG file: %s '%d'\n",
2354 static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
2356 return get_conf_item_string(ctx, "krb5_ccache_type",
2357 WINBIND_KRB5_CCACHE_TYPE);
2360 static const char *get_member_from_config(struct pwb_context *ctx)
2362 const char *ret = NULL;
2363 ret = get_conf_item_string(ctx, "require_membership_of",
2364 WINBIND_REQUIRED_MEMBERSHIP);
2368 return get_conf_item_string(ctx, "require-membership-of",
2369 WINBIND_REQUIRED_MEMBERSHIP);
2372 static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
2375 ret = get_config_item_int(ctx, "warn_pwd_expire",
2376 WINBIND_WARN_PWD_EXPIRE);
2377 /* no or broken setting */
2379 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
2385 * Retrieve the winbind separator.
2387 * @param ctx PAM winbind context.
2389 * @return string separator character. NULL on failure.
2392 static char winbind_get_separator(struct pwb_context *ctx)
2395 static struct wbcInterfaceDetails *details = NULL;
2397 wbc_status = wbcInterfaceDetails(&details);
2398 if (!WBC_ERROR_IS_OK(wbc_status)) {
2399 _pam_log(ctx, LOG_ERR,
2400 "Could not retrieve winbind interface details: %s",
2401 wbcErrorString(wbc_status));
2409 return details->winbind_separator;
2414 * Convert a upn to a name.
2416 * @param ctx PAM winbind context.
2417 * @param upn USer UPN to be trabslated.
2419 * @return converted name. NULL pointer on failure. Caller needs to free.
2422 static char* winbind_upn_to_username(struct pwb_context *ctx,
2426 wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
2427 struct wbcDomainSid sid;
2428 enum wbcSidType type;
2429 char *domain = NULL;
2433 /* This cannot work when the winbind separator = @ */
2435 sep = winbind_get_separator(ctx);
2436 if (!sep || sep == '@') {
2440 name = talloc_strdup(ctx, upn);
2444 if ((p = strchr(name, '@')) != NULL) {
2449 /* Convert the UPN to a SID */
2451 wbc_status = wbcLookupName(domain, name, &sid, &type);
2452 if (!WBC_ERROR_IS_OK(wbc_status)) {
2456 /* Convert the the SID back to the sAMAccountName */
2458 wbc_status = wbcLookupSid(&sid, &domain, &name, &type);
2459 if (!WBC_ERROR_IS_OK(wbc_status)) {
2463 return talloc_asprintf(ctx, "%s%c%s", domain, sep, name);
2466 static int _pam_delete_cred(pam_handle_t *pamh, int flags,
2467 int argc, enum pam_winbind_request_type type,
2470 int retval = PAM_SUCCESS;
2471 struct pwb_context *ctx = NULL;
2472 struct wbcLogoffUserParams logoff;
2473 struct wbcAuthErrorInfo *error = NULL;
2475 wbcErr wbc_status = WBC_ERR_SUCCESS;
2477 ZERO_STRUCT(logoff);
2479 retval = _pam_winbind_init_context(pamh, flags, argc, argv, type, &ctx);
2484 _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
2486 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2488 /* destroy the ccache here */
2490 uint32_t wbc_flags = 0;
2491 const char *ccname = NULL;
2492 struct passwd *pwd = NULL;
2494 retval = pam_get_user(pamh, &user, _("Username: "));
2496 _pam_log(ctx, LOG_ERR,
2497 "could not identify user");
2502 _pam_log(ctx, LOG_ERR,
2503 "username was NULL!");
2504 retval = PAM_USER_UNKNOWN;
2508 _pam_log_debug(ctx, LOG_DEBUG,
2509 "username [%s] obtained", user);
2511 ccname = pam_getenv(pamh, "KRB5CCNAME");
2512 if (ccname == NULL) {
2513 _pam_log_debug(ctx, LOG_DEBUG,
2514 "user has no KRB5CCNAME environment");
2517 pwd = getpwnam(user);
2519 retval = PAM_USER_UNKNOWN;
2523 wbc_flags = WBFLAG_PAM_KRB5 |
2524 WBFLAG_PAM_CONTACT_TRUSTDOM;
2526 logoff.username = user;
2529 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2533 discard_const_p(uint8_t, ccname),
2535 if (!WBC_ERROR_IS_OK(wbc_status)) {
2540 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2544 (uint8_t *)&wbc_flags,
2546 if (!WBC_ERROR_IS_OK(wbc_status)) {
2550 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2554 (uint8_t *)&pwd->pw_uid,
2555 sizeof(pwd->pw_uid));
2556 if (!WBC_ERROR_IS_OK(wbc_status)) {
2560 wbc_status = wbcLogoffUserEx(&logoff, &error);
2561 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2562 user, "wbcLogoffUser");
2563 wbcFreeMemory(error);
2564 wbcFreeMemory(logoff.blobs);
2565 logoff.blobs = NULL;
2567 if (!WBC_ERROR_IS_OK(wbc_status)) {
2568 _pam_log(ctx, LOG_INFO,
2569 "failed to logoff user %s: %s\n",
2570 user, wbcErrorString(wbc_status));
2576 wbcFreeMemory(logoff.blobs);
2579 if (!WBC_ERROR_IS_OK(wbc_status)) {
2580 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2581 user, "wbcLogoffUser");
2585 * Delete the krb5 ccname variable from the PAM environment
2586 * if it was set by winbind.
2588 if ((ctx->ctrl & WINBIND_KRB5_AUTH) && pam_getenv(pamh, "KRB5CCNAME")) {
2589 pam_putenv(pamh, "KRB5CCNAME");
2592 _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx, retval);
2600 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
2601 int argc, const char **argv)
2603 const char *username;
2604 const char *password;
2605 const char *member = NULL;
2606 const char *cctype = NULL;
2607 int warn_pwd_expire;
2608 int retval = PAM_AUTH_ERR;
2609 char *username_ret = NULL;
2610 char *new_authtok_required = NULL;
2611 char *real_username = NULL;
2612 struct pwb_context *ctx = NULL;
2614 retval = _pam_winbind_init_context(pamh, flags, argc, argv,
2615 PAM_WINBIND_AUTHENTICATE, &ctx);
2620 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
2622 /* Get the username */
2623 retval = pam_get_user(pamh, &username, NULL);
2624 if ((retval != PAM_SUCCESS) || (!username)) {
2625 _pam_log_debug(ctx, LOG_DEBUG,
2626 "can not get the username");
2627 retval = PAM_SERVICE_ERR;
2633 /* Decode the user name since AIX does not support logn user
2634 names by default. The name is encoded as _#uid. */
2636 if (username[0] == '_') {
2637 uid_t id = atoi(&username[1]);
2638 struct passwd *pw = NULL;
2640 if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
2641 real_username = strdup(pw->pw_name);
2646 if (!real_username) {
2647 /* Just making a copy of the username we got from PAM */
2648 if ((real_username = strdup(username)) == NULL) {
2649 _pam_log_debug(ctx, LOG_DEBUG,
2650 "memory allocation failure when copying "
2652 retval = PAM_SERVICE_ERR;
2657 /* Maybe this was a UPN */
2659 if (strchr(real_username, '@') != NULL) {
2660 char *samaccountname = NULL;
2662 samaccountname = winbind_upn_to_username(ctx,
2664 if (samaccountname) {
2665 free(real_username);
2666 real_username = strdup(samaccountname);
2670 retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
2671 _("Password: "), NULL,
2674 if (retval != PAM_SUCCESS) {
2675 _pam_log(ctx, LOG_ERR,
2676 "Could not retrieve user's password");
2677 retval = PAM_AUTHTOK_ERR;
2681 /* Let's not give too much away in the log file */
2683 #ifdef DEBUG_PASSWORD
2684 _pam_log_debug(ctx, LOG_INFO,
2685 "Verify user '%s' with password '%s'",
2686 real_username, password);
2688 _pam_log_debug(ctx, LOG_INFO,
2689 "Verify user '%s'", real_username);
2692 member = get_member_from_config(ctx);
2693 cctype = get_krb5_cc_type_from_config(ctx);
2694 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2696 /* Now use the username to look up password */
2697 retval = winbind_auth_request(ctx, real_username, password,
2698 member, cctype, warn_pwd_expire,
2700 NULL, &username_ret);
2702 if (retval == PAM_NEW_AUTHTOK_REQD ||
2703 retval == PAM_AUTHTOK_EXPIRED) {
2705 char *new_authtok_required_during_auth = NULL;
2707 new_authtok_required = talloc_asprintf(NULL, "%d", retval);
2708 if (!new_authtok_required) {
2709 retval = PAM_BUF_ERR;
2713 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2714 new_authtok_required,
2715 _pam_winbind_cleanup_func);
2717 retval = PAM_SUCCESS;
2719 new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
2720 if (!new_authtok_required_during_auth) {
2721 retval = PAM_BUF_ERR;
2725 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2726 new_authtok_required_during_auth,
2727 _pam_winbind_cleanup_func);
2734 pam_set_item (pamh, PAM_USER, username_ret);
2735 _pam_log_debug(ctx, LOG_INFO,
2736 "Returned user was '%s'", username_ret);
2740 if (real_username) {
2741 free(real_username);
2744 if (!new_authtok_required) {
2745 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2748 if (retval != PAM_SUCCESS) {
2749 _pam_free_data_info3(pamh);
2752 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
2760 int pam_sm_setcred(pam_handle_t *pamh, int flags,
2761 int argc, const char **argv)
2763 int ret = PAM_SYSTEM_ERR;
2764 struct pwb_context *ctx = NULL;
2766 ret = _pam_winbind_init_context(pamh, flags, argc, argv,
2767 PAM_WINBIND_SETCRED, &ctx);
2772 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
2774 switch (flags & ~PAM_SILENT) {
2776 case PAM_DELETE_CRED:
2777 ret = _pam_delete_cred(pamh, flags, argc,
2778 PAM_WINBIND_SETCRED, argv);
2780 case PAM_REFRESH_CRED:
2781 _pam_log_debug(ctx, LOG_WARNING,
2782 "PAM_REFRESH_CRED not implemented");
2785 case PAM_REINITIALIZE_CRED:
2786 _pam_log_debug(ctx, LOG_WARNING,
2787 "PAM_REINITIALIZE_CRED not implemented");
2790 case PAM_ESTABLISH_CRED:
2791 _pam_log_debug(ctx, LOG_WARNING,
2792 "PAM_ESTABLISH_CRED not implemented");
2796 ret = PAM_SYSTEM_ERR;
2802 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
2810 * Account management. We want to verify that the account exists
2811 * before returning PAM_SUCCESS
2814 int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2815 int argc, const char **argv)
2817 const char *username;
2818 int ret = PAM_USER_UNKNOWN;
2819 const char *tmp = NULL;
2820 struct pwb_context *ctx = NULL;
2822 ret = _pam_winbind_init_context(pamh, flags, argc, argv,
2823 PAM_WINBIND_ACCT_MGMT, &ctx);
2828 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
2831 /* Get the username */
2832 ret = pam_get_user(pamh, &username, NULL);
2833 if ((ret != PAM_SUCCESS) || (!username)) {
2834 _pam_log_debug(ctx, LOG_DEBUG,
2835 "can not get the username");
2836 ret = PAM_SERVICE_ERR;
2840 /* Verify the username */
2841 ret = valid_user(ctx, username);
2844 /* some sort of system error. The log was already printed */
2845 ret = PAM_SERVICE_ERR;
2848 /* the user does not exist */
2849 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
2851 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
2855 ret = PAM_USER_UNKNOWN;
2858 pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2859 (const void **)&tmp);
2863 case PAM_AUTHTOK_EXPIRED:
2864 /* fall through, since new token is required in this case */
2865 case PAM_NEW_AUTHTOK_REQD:
2866 _pam_log(ctx, LOG_WARNING,
2867 "pam_sm_acct_mgmt success but %s is set",
2868 PAM_WINBIND_NEW_AUTHTOK_REQD);
2869 _pam_log(ctx, LOG_NOTICE,
2870 "user '%s' needs new password",
2872 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2873 ret = PAM_NEW_AUTHTOK_REQD;
2876 _pam_log(ctx, LOG_WARNING,
2877 "pam_sm_acct_mgmt success");
2878 _pam_log(ctx, LOG_NOTICE,
2879 "user '%s' granted access", username);
2885 /* Otherwise, the authentication looked good */
2886 _pam_log(ctx, LOG_NOTICE,
2887 "user '%s' granted access", username);
2891 /* we don't know anything about this return value */
2892 _pam_log(ctx, LOG_ERR,
2893 "internal module error (ret = %d, user = '%s')",
2895 ret = PAM_SERVICE_ERR;
2899 /* should not be reached */
2904 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
2912 int pam_sm_open_session(pam_handle_t *pamh, int flags,
2913 int argc, const char **argv)
2915 int ret = PAM_SUCCESS;
2916 struct pwb_context *ctx = NULL;
2918 ret = _pam_winbind_init_context(pamh, flags, argc, argv,
2919 PAM_WINBIND_OPEN_SESSION, &ctx);
2924 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
2926 if (ctx->ctrl & WINBIND_MKHOMEDIR) {
2927 /* check and create homedir */
2928 ret = _pam_mkhomedir(ctx);
2931 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
2939 int pam_sm_close_session(pam_handle_t *pamh, int flags,
2940 int argc, const char **argv)
2942 int ret = PAM_SUCCESS;
2943 struct pwb_context *ctx = NULL;
2945 ret = _pam_winbind_init_context(pamh, flags, argc, argv,
2946 PAM_WINBIND_CLOSE_SESSION, &ctx);
2951 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
2954 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
2962 * evaluate whether we need to re-authenticate with kerberos after a
2965 * @param ctx PAM winbind context.
2966 * @param user The username
2968 * @return boolean Returns true if required, false if not.
2971 static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
2975 /* Make sure that we only do this if a) the chauthtok got initiated
2976 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2977 * later password change via the "passwd" command if done by the user
2979 * NB. If we login from gdm or xdm and the password expires,
2980 * we change the password, but there is no memory cache.
2981 * Thus, even for passthrough login, we should do the
2982 * authentication again to update memory cache.
2986 char *new_authtok_reqd_during_auth = NULL;
2987 struct passwd *pwd = NULL;
2989 pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2990 (const void **) &new_authtok_reqd_during_auth);
2991 pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2994 if (new_authtok_reqd_during_auth) {
2998 pwd = getpwnam(user);
3003 if (getuid() == pwd->pw_uid) {
3012 int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
3013 int argc, const char **argv)
3017 bool cached_login = false;
3019 /* <DO NOT free() THESE> */
3021 const char *pass_old;
3022 const char *pass_new;
3023 /* </DO NOT free() THESE> */
3028 char *username_ret = NULL;
3029 struct wbcAuthErrorInfo *error = NULL;
3030 struct pwb_context *ctx = NULL;
3032 ret = _pam_winbind_init_context(pamh, flags, argc, argv,
3033 PAM_WINBIND_CHAUTHTOK, &ctx);
3038 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
3040 cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
3042 /* clearing offline bit for auth */
3043 ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
3046 * First get the name of a user
3048 ret = pam_get_user(pamh, &user, _("Username: "));
3050 _pam_log(ctx, LOG_ERR,
3051 "password - could not identify user");
3056 _pam_log(ctx, LOG_ERR, "username was NULL!");
3057 ret = PAM_USER_UNKNOWN;
3061 _pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
3063 /* check if this is really a user in winbindd, not only in NSS */
3064 ret = valid_user(ctx, user);
3067 ret = PAM_USER_UNKNOWN;
3070 ret = PAM_SYSTEM_ERR;
3077 * obtain and verify the current password (OLDAUTHTOK) for
3081 if (flags & PAM_PRELIM_CHECK) {
3082 time_t pwdlastset_prelim = 0;
3084 /* instruct user what is happening */
3086 #define greeting _("Changing password for")
3087 Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
3089 _pam_log(ctx, LOG_CRIT,
3090 "password - out of memory");
3096 lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
3097 ret = _winbind_read_password(ctx, lctrl,
3099 _("(current) NT password: "),
3101 (const char **) &pass_old);
3102 TALLOC_FREE(Announce);
3103 if (ret != PAM_SUCCESS) {
3104 _pam_log(ctx, LOG_NOTICE,
3105 "password - (old) token not obtained");
3109 /* verify that this is the password for this user */
3111 ret = winbind_auth_request(ctx, user, pass_old,
3114 &pwdlastset_prelim, NULL);
3116 if (ret != PAM_ACCT_EXPIRED &&
3117 ret != PAM_AUTHTOK_EXPIRED &&
3118 ret != PAM_NEW_AUTHTOK_REQD &&
3119 ret != PAM_SUCCESS) {
3124 pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3125 (void *)pwdlastset_prelim, NULL);
3127 ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
3128 (const void *) pass_old);
3130 if (ret != PAM_SUCCESS) {
3131 _pam_log(ctx, LOG_CRIT,
3132 "failed to set PAM_OLDAUTHTOK");
3134 } else if (flags & PAM_UPDATE_AUTHTOK) {
3136 time_t pwdlastset_update = 0;
3139 * obtain the proposed password
3143 * get the old token back.
3146 ret = pam_get_item(pamh, PAM_OLDAUTHTOK, (const void **) &pass_old);
3148 if (ret != PAM_SUCCESS) {
3149 _pam_log(ctx, LOG_NOTICE,
3150 "user not authenticated");
3154 lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
3156 if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
3157 lctrl |= WINBIND_USE_FIRST_PASS_ARG;
3160 ret = PAM_AUTHTOK_ERR;
3161 while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
3163 * use_authtok is to force the use of a previously entered
3164 * password -- needed for pluggable password strength checking
3167 ret = _winbind_read_password(ctx, lctrl,
3169 _("Enter new NT password: "),
3170 _("Retype new NT password: "),
3171 (const char **)&pass_new);
3173 if (ret != PAM_SUCCESS) {
3174 _pam_log_debug(ctx, LOG_ALERT,
3176 "new password not obtained");
3177 pass_old = NULL;/* tidy up */
3182 * At this point we know who the user is and what they
3183 * propose as their new password. Verify that the new
3184 * password is acceptable.
3187 if (pass_new[0] == '\0') {/* "\0" password = NULL */
3193 * By reaching here we have approved the passwords and must now
3194 * rebuild the password database file.
3196 pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3197 (const void **) &pwdlastset_update);
3200 * if cached creds were enabled, make sure to set the
3201 * WINBIND_CACHED_LOGIN bit here in order to have winbindd
3202 * update the cached creds storage - gd
3205 ctx->ctrl |= WINBIND_CACHED_LOGIN;
3208 ret = winbind_chauthtok_request(ctx, user, pass_old,
3209 pass_new, pwdlastset_update);
3211 pass_old = pass_new = NULL;
3215 if (_pam_require_krb5_auth_after_chauthtok(ctx, user)) {
3217 const char *member = NULL;
3218 const char *cctype = NULL;
3219 int warn_pwd_expire;
3220 struct wbcLogonUserInfo *info = NULL;
3221 struct wbcUserPasswordPolicyInfo *policy = NULL;
3223 member = get_member_from_config(ctx);
3224 cctype = get_krb5_cc_type_from_config(ctx);
3225 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
3227 /* Keep WINBIND_CACHED_LOGIN bit for
3228 * authentication after changing the password.
3229 * This will update the cached credentials in case
3230 * that winbindd_dual_pam_chauthtok() fails
3235 ret = winbind_auth_request(ctx, user, pass_new,
3237 &error, &info, &policy,
3238 NULL, &username_ret);
3239 pass_old = pass_new = NULL;
3241 if (ret == PAM_SUCCESS) {
3243 struct wbcAuthUserInfo *user_info = NULL;
3245 if (info && info->info) {
3246 user_info = info->info;
3249 /* warn a user if the password is about to
3251 _pam_warn_password_expiry(ctx, user_info, policy,
3255 /* set some info3 info for other modules in the
3257 _pam_set_data_info3(ctx, user_info);
3259 /* put krb5ccname into env */
3260 _pam_setup_krb5_env(ctx, info);
3263 pam_set_item(pamh, PAM_USER,
3265 _pam_log_debug(ctx, LOG_INFO,
3266 "Returned user was '%s'",
3273 if (info && info->blobs) {
3274 wbcFreeMemory(info->blobs);
3276 wbcFreeMemory(info);
3277 wbcFreeMemory(policy);
3282 ret = PAM_SERVICE_ERR;
3287 /* Deal with offline errors. */
3289 const char *codes[] = {
3290 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3291 "NT_STATUS_NO_LOGON_SERVERS",
3292 "NT_STATUS_ACCESS_DENIED"
3295 for (i=0; i<ARRAY_SIZE(codes); i++) {
3297 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
3303 wbcFreeMemory(error);
3305 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
3314 /* static module data */
3316 struct pam_module _pam_winbind_modstruct = {
3318 pam_sm_authenticate,
3321 pam_sm_open_session,
3322 pam_sm_close_session,
3329 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3330 * Copyright (c) Tim Potter <tpot@samba.org> 2000
3331 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3332 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3333 * Copyright (c) Jan Rêkorajski 1999.
3334 * Copyright (c) Andrew G. Morgan 1996-8.
3335 * Copyright (c) Alex O. Yuriev, 1996.
3336 * Copyright (c) Cristian Gafton 1996.
3337 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3339 * Redistribution and use in source and binary forms, with or without
3340 * modification, are permitted provided that the following conditions
3342 * 1. Redistributions of source code must retain the above copyright
3343 * notice, and the entire permission notice in its entirety,
3344 * including the disclaimer of warranties.
3345 * 2. Redistributions in binary form must reproduce the above copyright
3346 * notice, this list of conditions and the following disclaimer in the
3347 * documentation and/or other materials provided with the distribution.
3348 * 3. The name of the author may not be used to endorse or promote
3349 * products derived from this software without specific prior
3350 * written permission.
3352 * ALTERNATIVELY, this product may be distributed under the terms of
3353 * the GNU Public License, in which case the provisions of the GPL are
3354 * required INSTEAD OF the above restrictions. (This clause is
3355 * necessary due to a potential bad interaction between the GPL and
3356 * the restrictions contained in a BSD-style copyright.)
3358 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3359 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3360 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3361 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3362 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3363 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3364 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3365 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3366 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3367 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3368 * OF THE POSSIBILITY OF SUCH DAMAGE.