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 */
177 static void _pam_log_int(const pam_handle_t *pamh,
180 va_list args) PRINTF_ATTRIBUTE(3, 0);
182 #ifdef HAVE_PAM_VSYSLOG
183 static void _pam_log_int(const pam_handle_t *pamh,
188 pam_vsyslog(pamh, err, format, args);
191 static void _pam_log_int(const pam_handle_t *pamh,
201 va_copy(args2, args);
203 pam_get_item(pamh, PAM_SERVICE, (const void **) &service);
205 ret = vasprintf(&base, format, args);
207 /* what else todo ? */
208 vsyslog(err, format, args2);
213 syslog(err, "%s(%s): %s", MODULE_NAME, service, base);
217 #endif /* HAVE_PAM_VSYSLOG */
219 static bool _pam_log_is_silent(int ctrl)
221 return on(ctrl, WINBIND_SILENT);
224 static void _pam_log(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
225 static void _pam_log(struct pwb_context *r, int err, const char *format, ...)
229 if (_pam_log_is_silent(r->ctrl)) {
233 va_start(args, format);
234 _pam_log_int(r->pamh, err, format, args);
237 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
238 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
242 if (_pam_log_is_silent(ctrl)) {
246 va_start(args, format);
247 _pam_log_int(pamh, err, format, args);
251 static bool _pam_log_is_debug_enabled(int ctrl)
257 if (_pam_log_is_silent(ctrl)) {
261 if (!(ctrl & WINBIND_DEBUG_ARG)) {
268 static bool _pam_log_is_debug_state_enabled(int ctrl)
270 if (!(ctrl & WINBIND_DEBUG_STATE)) {
274 return _pam_log_is_debug_enabled(ctrl);
277 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
278 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...)
282 if (!r || !_pam_log_is_debug_enabled(r->ctrl)) {
286 va_start(args, format);
287 _pam_log_int(r->pamh, err, format, args);
290 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
291 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
295 if (!_pam_log_is_debug_enabled(ctrl)) {
299 va_start(args, format);
300 _pam_log_int(pamh, err, format, args);
304 static void _pam_log_state_datum(struct pwb_context *ctx,
309 const void *data = NULL;
310 if (item_type != 0) {
311 pam_get_item(ctx->pamh, item_type, &data);
313 pam_get_data(ctx->pamh, key, &data);
316 const char *type = (item_type != 0) ? "ITEM" : "DATA";
317 if (is_string != 0) {
318 _pam_log_debug(ctx, LOG_DEBUG,
319 "[pamh: %p] STATE: %s(%s) = \"%s\" (%p)",
320 ctx->pamh, type, key, (const char *)data,
323 _pam_log_debug(ctx, LOG_DEBUG,
324 "[pamh: %p] STATE: %s(%s) = %p",
325 ctx->pamh, type, key, data);
330 #define _PAM_LOG_STATE_DATA_POINTER(ctx, module_data_name) \
331 _pam_log_state_datum(ctx, 0, module_data_name, 0)
333 #define _PAM_LOG_STATE_DATA_STRING(ctx, module_data_name) \
334 _pam_log_state_datum(ctx, 0, module_data_name, 1)
336 #define _PAM_LOG_STATE_ITEM_POINTER(ctx, item_type) \
337 _pam_log_state_datum(ctx, item_type, #item_type, 0)
339 #define _PAM_LOG_STATE_ITEM_STRING(ctx, item_type) \
340 _pam_log_state_datum(ctx, item_type, #item_type, 1)
342 #ifdef DEBUG_PASSWORD
343 #define _LOG_PASSWORD_AS_STRING 1
345 #define _LOG_PASSWORD_AS_STRING 0
348 #define _PAM_LOG_STATE_ITEM_PASSWORD(ctx, item_type) \
349 _pam_log_state_datum(ctx, item_type, #item_type, \
350 _LOG_PASSWORD_AS_STRING)
352 * wrapper to preserve old behaviour of iniparser which ignored
353 * key values that had no value assigned like
355 * for a key like above newer iniparser will return a zero-length
356 * string, previously iniparser would return NULL
358 * JRA: For compatibility, tiniparser behaves like iniparser.
360 static const char *tiniparser_getstring_nonempty(struct tiniparser_dictionary *d,
364 const char *ret = tiniparser_getstring(d, key, def);
365 if (ret && strlen(ret) == 0) {
371 static void _pam_log_state(struct pwb_context *ctx)
373 if (!ctx || !_pam_log_is_debug_state_enabled(ctx->ctrl)) {
377 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_SERVICE);
378 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER);
379 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_TTY);
380 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RHOST);
381 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RUSER);
382 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_OLDAUTHTOK);
383 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_AUTHTOK);
384 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER_PROMPT);
385 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_CONV);
386 #ifdef PAM_FAIL_DELAY
387 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_FAIL_DELAY);
389 #ifdef PAM_REPOSITORY
390 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_REPOSITORY);
393 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_HOMEDIR);
394 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSCRIPT);
395 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSERVER);
396 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_PROFILEPATH);
397 _PAM_LOG_STATE_DATA_STRING(ctx,
398 PAM_WINBIND_NEW_AUTHTOK_REQD);
399 /* Use atoi to get PAM result code */
400 _PAM_LOG_STATE_DATA_STRING(ctx,
401 PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
402 _PAM_LOG_STATE_DATA_POINTER(ctx, PAM_WINBIND_PWD_LAST_SET);
405 static int _pam_parse(const pam_handle_t *pamh,
409 enum pam_winbind_request_type type,
410 struct tiniparser_dictionary **result_d)
413 const char *config_file = NULL;
416 struct tiniparser_dictionary *d = NULL;
418 if (flags & PAM_SILENT) {
419 ctrl |= WINBIND_SILENT;
422 for (i=argc,v=argv; i-- > 0; ++v) {
423 if (!strncasecmp(*v, "config", strlen("config"))) {
424 ctrl |= WINBIND_CONFIG_FILE;
430 if (config_file == NULL) {
431 config_file = PAM_WINBIND_CONFIG_FILE;
434 d = tiniparser_load(config_file);
436 goto config_from_pam;
439 if (tiniparser_getboolean(d, "global:debug", false)) {
440 ctrl |= WINBIND_DEBUG_ARG;
443 if (tiniparser_getboolean(d, "global:debug_state", false)) {
444 ctrl |= WINBIND_DEBUG_STATE;
447 if (tiniparser_getboolean(d, "global:cached_login", false)) {
448 ctrl |= WINBIND_CACHED_LOGIN;
451 if (tiniparser_getboolean(d, "global:krb5_auth", false)) {
452 ctrl |= WINBIND_KRB5_AUTH;
455 if (tiniparser_getboolean(d, "global:silent", false)) {
456 ctrl |= WINBIND_SILENT;
459 if (tiniparser_getstring_nonempty(d, "global:krb5_ccache_type", NULL) != NULL) {
460 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
463 if ((tiniparser_getstring_nonempty(d, "global:require-membership-of", NULL)
465 (tiniparser_getstring_nonempty(d, "global:require_membership_of", NULL)
467 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
470 if (tiniparser_getboolean(d, "global:try_first_pass", false)) {
471 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
474 if (tiniparser_getint(d, "global:warn_pwd_expire", 0)) {
475 ctrl |= WINBIND_WARN_PWD_EXPIRE;
478 if (tiniparser_getboolean(d, "global:mkhomedir", false)) {
479 ctrl |= WINBIND_MKHOMEDIR;
483 /* step through arguments */
484 for (i=argc,v=argv; i-- > 0; ++v) {
486 /* generic options */
487 if (!strcmp(*v,"debug"))
488 ctrl |= WINBIND_DEBUG_ARG;
489 else if (!strcasecmp(*v, "debug_state"))
490 ctrl |= WINBIND_DEBUG_STATE;
491 else if (!strcasecmp(*v, "silent"))
492 ctrl |= WINBIND_SILENT;
493 else if (!strcasecmp(*v, "use_authtok"))
494 ctrl |= WINBIND_USE_AUTHTOK_ARG;
495 else if (!strcasecmp(*v, "try_authtok"))
496 ctrl |= WINBIND_TRY_AUTHTOK_ARG;
497 else if (!strcasecmp(*v, "use_first_pass"))
498 ctrl |= WINBIND_USE_FIRST_PASS_ARG;
499 else if (!strcasecmp(*v, "try_first_pass"))
500 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
501 else if (!strcasecmp(*v, "unknown_ok"))
502 ctrl |= WINBIND_UNKNOWN_OK_ARG;
503 else if ((type == PAM_WINBIND_AUTHENTICATE
504 || type == PAM_WINBIND_SETCRED)
505 && !strncasecmp(*v, "require_membership_of",
506 strlen("require_membership_of")))
507 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
508 else if ((type == PAM_WINBIND_AUTHENTICATE
509 || type == PAM_WINBIND_SETCRED)
510 && !strncasecmp(*v, "require-membership-of",
511 strlen("require-membership-of")))
512 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
513 else if (!strcasecmp(*v, "krb5_auth"))
514 ctrl |= WINBIND_KRB5_AUTH;
515 else if (!strncasecmp(*v, "krb5_ccache_type",
516 strlen("krb5_ccache_type")))
517 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
518 else if (!strcasecmp(*v, "cached_login"))
519 ctrl |= WINBIND_CACHED_LOGIN;
520 else if (!strcasecmp(*v, "mkhomedir"))
521 ctrl |= WINBIND_MKHOMEDIR;
522 else if (!strncasecmp(*v, "warn_pwd_expire",
523 strlen("warn_pwd_expire")))
524 ctrl |= WINBIND_WARN_PWD_EXPIRE;
525 else if (type != PAM_WINBIND_CLEANUP) {
526 __pam_log(pamh, ctrl, LOG_ERR,
527 "pam_parse: unknown option: %s", *v);
537 tiniparser_freedict(d);
544 static int _pam_winbind_free_context(struct pwb_context *ctx)
551 tiniparser_freedict(ctx->dict);
554 wbcCtxFree(ctx->wbc_ctx);
559 static int _pam_winbind_init_context(pam_handle_t *pamh,
563 enum pam_winbind_request_type type,
564 struct pwb_context **ctx_p)
566 struct pwb_context *r = NULL;
567 const char *service = NULL;
568 char service_name[32] = {0};
575 r = talloc_zero(NULL, struct pwb_context);
580 talloc_set_destructor(r, _pam_winbind_free_context);
586 ctrl_code = _pam_parse(pamh, flags, argc, argv, type, &r->dict);
587 if (ctrl_code == -1) {
589 return PAM_SYSTEM_ERR;
593 r->wbc_ctx = wbcCtxCreate();
594 if (r->wbc_ctx == NULL) {
596 return PAM_SYSTEM_ERR;
599 pam_get_item(pamh, PAM_SERVICE, (const void **)&service);
601 snprintf(service_name, sizeof(service_name), "PAM_WINBIND[%s]", service);
603 wbcSetClientProcessName(service_name);
610 static void _pam_winbind_cleanup_func(pam_handle_t *pamh,
614 int ctrl = _pam_parse(pamh, 0, 0, NULL, PAM_WINBIND_CLEANUP, NULL);
615 if (_pam_log_is_debug_state_enabled(ctrl)) {
616 __pam_log_debug(pamh, ctrl, LOG_DEBUG,
617 "[pamh: %p] CLEAN: cleaning up PAM data %p "
618 "(error_status = %d)", pamh, data,
625 static const struct ntstatus_errors {
626 const char *ntstatus_string;
627 const char *error_string;
628 } ntstatus_errors[] = {
631 {"NT_STATUS_BACKUP_CONTROLLER",
632 N_("No primary Domain Controller available")},
633 {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
634 N_("No domain controllers found")},
635 {"NT_STATUS_NO_LOGON_SERVERS",
636 N_("No logon servers")},
637 {"NT_STATUS_PWD_TOO_SHORT",
638 N_("Password too short")},
639 {"NT_STATUS_PWD_TOO_RECENT",
640 N_("The password of this user is too recent to change")},
641 {"NT_STATUS_PWD_HISTORY_CONFLICT",
642 N_("Password is already in password history")},
643 {"NT_STATUS_PASSWORD_EXPIRED",
644 N_("Your password has expired")},
645 {"NT_STATUS_PASSWORD_MUST_CHANGE",
646 N_("You need to change your password now")},
647 {"NT_STATUS_INVALID_WORKSTATION",
648 N_("You are not allowed to logon from this workstation")},
649 {"NT_STATUS_INVALID_LOGON_HOURS",
650 N_("You are not allowed to logon at this time")},
651 {"NT_STATUS_ACCOUNT_EXPIRED",
652 N_("Your account has expired. "
653 "Please contact your System administrator")}, /* SCNR */
654 {"NT_STATUS_ACCOUNT_DISABLED",
655 N_("Your account is disabled. "
656 "Please contact your System administrator")}, /* SCNR */
657 {"NT_STATUS_ACCOUNT_LOCKED_OUT",
658 N_("Your account has been locked. "
659 "Please contact your System administrator")}, /* SCNR */
660 {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
661 N_("Invalid Trust Account")},
662 {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
663 N_("Invalid Trust Account")},
664 {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
665 N_("Invalid Trust Account")},
666 {"NT_STATUS_ACCESS_DENIED",
667 N_("Access is denied")},
671 static const char *_get_ntstatus_error_string(const char *nt_status_string)
674 for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
675 if (!strcasecmp(ntstatus_errors[i].ntstatus_string,
677 return _(ntstatus_errors[i].error_string);
683 /* --- authentication management functions --- */
685 /* Attempt a conversation */
687 static int converse(const pam_handle_t *pamh,
689 const struct pam_message **message,
690 struct pam_response **response)
693 const struct pam_conv *conv;
695 retval = pam_get_item(pamh, PAM_CONV, (const void **) &conv);
696 if (retval == PAM_SUCCESS) {
697 retval = conv->conv(nargs,
698 discard_const_p(const struct pam_message *, message),
699 response, conv->appdata_ptr);
702 return retval; /* propagate error status */
706 static int _make_remark(struct pwb_context *ctx,
710 int retval = PAM_SUCCESS;
712 const struct pam_message *pmsg[1];
713 struct pam_message msg[1];
714 struct pam_response *resp;
716 if (ctx->flags & WINBIND_SILENT) {
721 msg[0].msg = discard_const_p(char, text);
722 msg[0].msg_style = type;
725 retval = converse(ctx->pamh, 1, pmsg, &resp);
728 _pam_drop_reply(resp, 1);
733 static int _make_remark_v(struct pwb_context *ctx,
736 va_list args) PRINTF_ATTRIBUTE(3, 0);
738 static int _make_remark_v(struct pwb_context *ctx,
746 ret = vasprintf(&var, format, args);
748 _pam_log(ctx, LOG_ERR, "memory allocation failure");
752 ret = _make_remark(ctx, type, var);
757 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
758 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...)
763 va_start(args, format);
764 ret = _make_remark_v(ctx, type, format, args);
769 static int pam_winbind_request_log(struct pwb_context *ctx,
776 /* incorrect password */
777 _pam_log(ctx, LOG_WARNING, "user '%s' denied access "
778 "(incorrect password or invalid membership)", user);
780 case PAM_ACCT_EXPIRED:
781 /* account expired */
782 _pam_log(ctx, LOG_WARNING, "user '%s' account expired",
785 case PAM_AUTHTOK_EXPIRED:
786 /* password expired */
787 _pam_log(ctx, LOG_WARNING, "user '%s' password expired",
790 case PAM_NEW_AUTHTOK_REQD:
791 /* new password required */
792 _pam_log(ctx, LOG_WARNING, "user '%s' new password "
795 case PAM_USER_UNKNOWN:
796 /* the user does not exist */
797 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
799 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
803 case PAM_AUTHTOK_ERR:
804 /* Authentication token manipulation error */
805 _pam_log(ctx, LOG_WARNING, "user `%s' authentication token change failed "
806 "(pwd complexity/history/min_age not met?)", user);
809 /* Otherwise, the authentication looked good */
810 if (strcmp(fn, "wbcLogonUser") == 0) {
811 _pam_log(ctx, LOG_NOTICE,
812 "user '%s' granted access", user);
814 _pam_log(ctx, LOG_NOTICE,
815 "user '%s' OK", user);
819 /* we don't know anything about this return value */
820 _pam_log(ctx, LOG_ERR,
821 "internal module error (retval = %s(%d), user = '%s')",
822 _pam_error_code_str(retval), retval, user);
827 static int wbc_auth_error_to_pam_error(struct pwb_context *ctx,
828 struct wbcAuthErrorInfo *e,
830 const char *username,
833 int ret = PAM_AUTH_ERR;
835 if (WBC_ERROR_IS_OK(status)) {
836 _pam_log_debug(ctx, LOG_DEBUG, "request %s succeeded",
839 return pam_winbind_request_log(ctx, ret, username, fn);
843 if (e->pam_error != PAM_SUCCESS) {
844 _pam_log(ctx, LOG_ERR,
845 "request %s failed: %s, "
846 "PAM error: %s (%d), NTSTATUS: %s, "
847 "Error message was: %s",
849 wbcErrorString(status),
850 _pam_error_code_str(e->pam_error),
855 return pam_winbind_request_log(ctx, ret, username, fn);
858 _pam_log(ctx, LOG_ERR, "request %s failed, but PAM error 0!", fn);
860 ret = PAM_SERVICE_ERR;
861 return pam_winbind_request_log(ctx, ret, username, fn);
864 ret = wbc_error_to_pam_error(status);
865 return pam_winbind_request_log(ctx, ret, username, fn);
868 #if defined(HAVE_PAM_RADIO_TYPE)
869 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
871 struct pam_message msg;
872 const struct pam_message *pmsg;
873 struct pam_response *resp = NULL;
877 msg.msg_style = PAM_RADIO_TYPE;
878 msg.msg = _("Do you want to change your password now?");
879 ret = converse(ctx->pamh, 1, &pmsg, &resp);
881 if (ret == PAM_SUCCESS) {
882 _pam_log(ctx, LOG_CRIT, "pam_winbind: system error!\n");
886 if (ret != PAM_SUCCESS) {
889 _pam_log(ctx, LOG_CRIT, "Received [%s] reply from application.\n", resp->resp);
891 if ((resp->resp != NULL) && (strcasecmp(resp->resp, "yes") == 0)) {
895 _pam_drop_reply(resp, 1);
899 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
906 * send a password expiry message if required
908 * @param ctx PAM winbind context.
909 * @param next_change expected (calculated) next expiry date.
910 * @param already_expired pointer to a boolean to indicate if the password is
913 * @return boolean Returns true if message has been sent, false if not.
916 static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
920 bool *already_expired,
924 struct tm tm_now, tm_next_change;
928 if (already_expired) {
929 *already_expired = false;
936 if (next_change <= now) {
937 PAM_WB_REMARK_DIRECT(ctx, "NT_STATUS_PASSWORD_EXPIRED");
938 if (already_expired) {
939 *already_expired = true;
944 if ((next_change < 0) ||
945 (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
949 if ((localtime_r(&now, &tm_now) == NULL) ||
950 (localtime_r(&next_change, &tm_next_change) == NULL)) {
954 days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) -
955 (tm_now.tm_yday+tm_now.tm_year*365);
958 ret = _make_remark(ctx, PAM_TEXT_INFO,
959 _("Your password expires today.\n"));
962 * If change_pwd and already_expired is null.
963 * We are just sending a notification message.
964 * We don't expect any response in this case.
967 if (!change_pwd && !already_expired) {
972 * successfully sent the warning message.
973 * Give the user a chance to change pwd.
975 if (ret == PAM_SUCCESS) {
977 retval = _pam_winbind_change_pwd(ctx);
986 if (days > 0 && days < warn_pwd_expire) {
988 ret = _make_remark_format(ctx, PAM_TEXT_INFO,
989 _("Your password will expire in %d %s.\n"),
990 days, (days > 1) ? _("days"):_("day"));
992 * If change_pwd and already_expired is null.
993 * We are just sending a notification message.
994 * We don't expect any response in this case.
997 if (!change_pwd && !already_expired) {
1002 * successfully sent the warning message.
1003 * Give the user a chance to change pwd.
1005 if (ret == PAM_SUCCESS) {
1007 retval = _pam_winbind_change_pwd(ctx);
1020 * Send a warning if the password expires in the near future
1022 * @param ctx PAM winbind context.
1023 * @param response The full authentication response structure.
1024 * @param already_expired boolean, is the pwd already expired?
1029 static void _pam_warn_password_expiry(struct pwb_context *ctx,
1030 const struct wbcAuthUserInfo *info,
1031 int warn_pwd_expire,
1032 bool *already_expired,
1035 time_t now = time(NULL);
1036 time_t next_change = 0;
1042 if (already_expired) {
1043 *already_expired = false;
1047 *change_pwd = false;
1050 /* accounts with WBC_ACB_PWNOEXP set never receive a warning */
1051 if (info->acct_flags & WBC_ACB_PWNOEXP) {
1055 /* no point in sending a warning if this is a grace logon */
1056 if (PAM_WB_GRACE_LOGON(info->user_flags)) {
1060 /* check if the info3 must change timestamp has been set */
1061 next_change = info->pass_must_change_time;
1063 if (_pam_send_password_expiry_message(ctx, next_change, now,
1070 /* no warning sent */
1073 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
1076 * Append a string, making sure not to overflow and to always return a
1077 * NULL-terminated string.
1079 * @param dest Destination string buffer (must already be NULL-terminated).
1080 * @param src Source string buffer.
1081 * @param dest_buffer_size Size of dest buffer in bytes.
1083 * @return false if dest buffer is not big enough (no bytes copied), true on
1087 static bool safe_append_string(char *dest,
1089 int dest_buffer_size)
1092 len = strlcat(dest, src, dest_buffer_size);
1093 return (len < dest_buffer_size);
1097 * Convert a names into a SID string, appending it to a buffer.
1099 * @param ctx PAM winbind context.
1100 * @param user User in PAM request.
1101 * @param name Name to convert.
1102 * @param sid_list_buffer Where to append the string sid.
1103 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1105 * @return false on failure, true on success.
1107 static bool winbind_name_to_sid_string(struct pwb_context *ctx,
1110 char *sid_list_buffer,
1111 int sid_list_buffer_size)
1113 char sid_string[WBC_SID_STRING_BUFLEN];
1116 if (IS_SID_STRING(name)) {
1117 strlcpy(sid_string, name, sizeof(sid_string));
1120 struct wbcDomainSid sid;
1121 enum wbcSidType type;
1123 _pam_log_debug(ctx, LOG_DEBUG,
1124 "no sid given, looking up: %s\n", name);
1126 wbc_status = wbcCtxLookupName(ctx->wbc_ctx,
1131 if (!WBC_ERROR_IS_OK(wbc_status)) {
1132 _pam_log(ctx, LOG_INFO,
1133 "could not lookup name: %s\n", name);
1137 wbcSidToStringBuf(&sid, sid_string, sizeof(sid_string));
1140 if (!safe_append_string(sid_list_buffer, sid_string,
1141 sid_list_buffer_size)) {
1148 * Convert a list of names into a list of sids.
1150 * @param ctx PAM winbind context.
1151 * @param user User in PAM request.
1152 * @param name_list List of names or string sids, separated by commas.
1153 * @param sid_list_buffer Where to put the list of string sids.
1154 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1156 * @return false on failure, true on success.
1158 static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
1160 const char *name_list,
1161 char *sid_list_buffer,
1162 int sid_list_buffer_size)
1164 bool result = false;
1165 char *current_name = NULL;
1166 const char *search_location;
1170 if (sid_list_buffer_size > 0) {
1171 sid_list_buffer[0] = 0;
1174 search_location = name_list;
1175 while ((comma = strchr(search_location, ',')) != NULL) {
1176 current_name = strndup(search_location,
1177 comma - search_location);
1178 if (NULL == current_name) {
1182 if (!winbind_name_to_sid_string(ctx, user,
1185 sid_list_buffer_size)) {
1187 * If one group name failed, we must not fail
1188 * the authentication totally, continue with
1189 * the following group names. If user belongs to
1190 * one of the valid groups, we must allow it
1194 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1195 "check if group %s is valid group.", current_name,
1197 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1198 "to sid, please contact your administrator to see "
1199 "if group %s is valid."), current_name, current_name);
1200 SAFE_FREE(current_name);
1201 search_location = comma + 1;
1205 SAFE_FREE(current_name);
1207 if (!safe_append_string(sid_list_buffer, ",",
1208 sid_list_buffer_size)) {
1212 search_location = comma + 1;
1215 if (!winbind_name_to_sid_string(ctx, user, search_location,
1217 sid_list_buffer_size)) {
1218 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1219 "check if group %s is valid group.", search_location,
1221 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1222 "to sid, please contact your administrator to see "
1223 "if group %s is valid."), search_location, search_location);
1225 /* If no valid groups were converted we should fail outright */
1226 if (name_list != NULL && strlen(sid_list_buffer) == 0) {
1231 * The lookup of the last name failed..
1232 * It results in require_member_of_sid ends with ','
1233 * It is malformatted parameter here, overwrite the last ','.
1235 len = strlen(sid_list_buffer);
1236 if ((len != 0) && (sid_list_buffer[len - 1] == ',')) {
1237 sid_list_buffer[len - 1] = '\0';
1244 SAFE_FREE(current_name);
1249 * put krb5ccname variable into environment
1251 * @param ctx PAM winbind context.
1252 * @param krb5ccname env variable retrieved from winbindd.
1257 static void _pam_setup_krb5_env(struct pwb_context *ctx,
1258 struct wbcLogonUserInfo *info)
1263 const char *krb5ccname = NULL;
1265 if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
1273 for (i=0; i < info->num_blobs; i++) {
1274 if (strcasecmp(info->blobs[i].name, "krb5ccname") == 0) {
1275 krb5ccname = (const char *)info->blobs[i].blob.data;
1280 if (!krb5ccname || (strlen(krb5ccname) == 0)) {
1284 _pam_log_debug(ctx, LOG_DEBUG,
1285 "request returned KRB5CCNAME: %s", krb5ccname);
1287 if (asprintf(&var, "KRB5CCNAME=%s", krb5ccname) == -1) {
1291 ret = pam_putenv(ctx->pamh, var);
1292 if (ret != PAM_SUCCESS) {
1293 _pam_log(ctx, LOG_ERR,
1294 "failed to set KRB5CCNAME to %s: %s",
1295 var, pam_strerror(ctx->pamh, ret));
1301 * Copy unix username if available (further processed in PAM).
1303 * @param ctx PAM winbind context
1304 * @param user_ret A pointer that holds a pointer to a string
1305 * @param unix_username A username
1310 static void _pam_setup_unix_username(struct pwb_context *ctx,
1312 struct wbcLogonUserInfo *info)
1314 const char *unix_username = NULL;
1317 if (!user_ret || !info) {
1321 for (i=0; i < info->num_blobs; i++) {
1322 if (strcasecmp(info->blobs[i].name, "unix_username") == 0) {
1323 unix_username = (const char *)info->blobs[i].blob.data;
1328 if (!unix_username || !unix_username[0]) {
1332 *user_ret = strdup(unix_username);
1336 * Set string into the PAM stack.
1338 * @param ctx PAM winbind context.
1339 * @param data_name Key name for pam_set_data.
1340 * @param value String value.
1345 static void _pam_set_data_string(struct pwb_context *ctx,
1346 const char *data_name,
1351 if (!data_name || !value || (strlen(data_name) == 0) ||
1352 (strlen(value) == 0)) {
1356 ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
1357 _pam_winbind_cleanup_func);
1358 if (ret != PAM_SUCCESS) {
1359 _pam_log_debug(ctx, LOG_DEBUG,
1360 "Could not set data %s: %s\n",
1361 data_name, pam_strerror(ctx->pamh, ret));
1366 * Set info3 strings into the PAM stack.
1368 * @param ctx PAM winbind context.
1369 * @param data_name Key name for pam_set_data.
1370 * @param value String value.
1375 static void _pam_set_data_info3(struct pwb_context *ctx,
1376 const struct wbcAuthUserInfo *info)
1378 _pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
1379 info->home_directory);
1380 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
1381 info->logon_script);
1382 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
1383 info->logon_server);
1384 _pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
1385 info->profile_path);
1389 * Free info3 strings in the PAM stack.
1391 * @param pamh PAM handle
1396 static void _pam_free_data_info3(pam_handle_t *pamh)
1398 pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1399 pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1400 pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1401 pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1405 * Send PAM_ERROR_MSG for cached or grace logons.
1407 * @param ctx PAM winbind context.
1408 * @param username User in PAM request.
1409 * @param info3_user_flgs Info3 flags containing logon type bits.
1414 static void _pam_warn_logon_type(struct pwb_context *ctx,
1415 const char *username,
1416 uint32_t info3_user_flgs)
1418 /* inform about logon type */
1419 if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1421 _make_remark(ctx, PAM_ERROR_MSG,
1423 "Please change your password as soon you're "
1425 _pam_log_debug(ctx, LOG_DEBUG,
1426 "User %s logged on using grace logon\n",
1429 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1431 _make_remark(ctx, PAM_ERROR_MSG,
1432 _("Domain Controller unreachable, "
1433 "using cached credentials instead. "
1434 "Network resources may be unavailable"));
1435 _pam_log_debug(ctx, LOG_DEBUG,
1436 "User %s logged on using cached credentials\n",
1442 * Send PAM_ERROR_MSG for krb5 errors.
1444 * @param ctx PAM winbind context.
1445 * @param username User in PAM request.
1446 * @param info3_user_flgs Info3 flags containing logon type bits.
1451 static void _pam_warn_krb5_failure(struct pwb_context *ctx,
1452 const char *username,
1453 uint32_t info3_user_flgs)
1455 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1456 _make_remark(ctx, PAM_ERROR_MSG,
1457 _("Failed to establish your Kerberos Ticket cache "
1458 "due time differences\n"
1459 "with the domain controller. "
1460 "Please verify the system time.\n"));
1461 _pam_log_debug(ctx, LOG_DEBUG,
1462 "User %s: Clock skew when getting Krb5 TGT\n",
1467 static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
1468 const struct wbcAuthErrorInfo *e,
1469 const char *nt_status_string,
1472 const char *ntstatus = NULL;
1473 const char *error_string = NULL;
1475 if (!e || !pam_err) {
1479 ntstatus = e->nt_string;
1484 if (strcasecmp(ntstatus, nt_status_string) == 0) {
1486 error_string = _get_ntstatus_error_string(nt_status_string);
1488 _make_remark(ctx, PAM_ERROR_MSG, error_string);
1489 *pam_err = e->pam_error;
1493 if (e->display_string) {
1494 _make_remark(ctx, PAM_ERROR_MSG, _(e->display_string));
1495 *pam_err = e->pam_error;
1499 _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
1500 *pam_err = e->pam_error;
1509 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1511 * @param i The wbcUserPasswordPolicyInfo struct.
1513 * @return string (caller needs to talloc_free).
1516 static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
1517 struct wbcUserPasswordPolicyInfo *i)
1525 str = talloc_asprintf(ctx, _("Your password "));
1530 if (i->min_length_password > 0) {
1531 str = talloc_asprintf_append(str,
1532 _("must be at least %d characters; "),
1533 i->min_length_password);
1539 if (i->password_history > 0) {
1540 str = talloc_asprintf_append(str,
1541 _("cannot repeat any of your previous %d "
1543 i->password_history);
1549 if (i->password_properties & WBC_DOMAIN_PASSWORD_COMPLEX) {
1550 str = talloc_asprintf_append(str,
1551 _("must contain capitals, numerals "
1553 "and cannot contain your account "
1560 str = talloc_asprintf_append(str,
1561 _("Please type a different password. "
1562 "Type a password which meets these requirements in "
1563 "both text boxes."));
1575 static int _pam_create_homedir(struct pwb_context *ctx,
1576 const char *dirname,
1581 if (stat(dirname, &sbuf) == 0) {
1585 if (mkdir(dirname, mode) != 0) {
1587 _make_remark_format(ctx, PAM_TEXT_INFO,
1588 _("Creating directory: %s failed: %s"),
1589 dirname, strerror(errno));
1590 _pam_log(ctx, LOG_ERR, "could not create dir: %s (%s)",
1591 dirname, strerror(errno));
1592 return PAM_PERM_DENIED;
1598 static int _pam_chown_homedir(struct pwb_context *ctx,
1599 const char *dirname,
1603 if (chown(dirname, uid, gid) != 0) {
1604 _pam_log(ctx, LOG_ERR, "failed to chown user homedir: %s (%s)",
1605 dirname, strerror(errno));
1606 return PAM_PERM_DENIED;
1612 static int _pam_mkhomedir(struct pwb_context *ctx)
1614 struct passwd *pwd = NULL;
1616 char *create_dir = NULL;
1617 char *user_dir = NULL;
1619 const char *username;
1621 char *safe_ptr = NULL;
1624 /* Get the username */
1625 ret = pam_get_user(ctx->pamh, &username, NULL);
1626 if ((ret != PAM_SUCCESS) || (!username)) {
1627 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1628 return PAM_SERVICE_ERR;
1631 pwd = getpwnam(username);
1633 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1634 return PAM_USER_UNKNOWN;
1636 _pam_log_debug(ctx, LOG_DEBUG, "homedir is: %s", pwd->pw_dir);
1638 ret = _pam_create_homedir(ctx, pwd->pw_dir, 0700);
1639 if (ret == PAM_SUCCESS) {
1640 ret = _pam_chown_homedir(ctx, pwd->pw_dir,
1645 if (ret == PAM_SUCCESS) {
1649 /* maybe we need to create parent dirs */
1650 create_dir = talloc_strdup(ctx, "/");
1655 /* find final directory */
1656 user_dir = strrchr(pwd->pw_dir, '/');
1662 _pam_log(ctx, LOG_DEBUG, "final directory: %s", user_dir);
1666 while ((token = strtok_r(p, "/", &safe_ptr)) != NULL) {
1672 _pam_log_debug(ctx, LOG_DEBUG, "token is %s", token);
1674 create_dir = talloc_asprintf_append(create_dir, "%s/", token);
1678 _pam_log_debug(ctx, LOG_DEBUG, "current_dir is %s", create_dir);
1680 if (strcmp(token, user_dir) == 0) {
1681 _pam_log_debug(ctx, LOG_DEBUG, "assuming last directory: %s", token);
1685 ret = _pam_create_homedir(ctx, create_dir, mode);
1686 if (ret != PAM_SUCCESS) {
1691 return _pam_chown_homedir(ctx, create_dir,
1696 /* talk to winbindd */
1697 static int winbind_auth_request(struct pwb_context *ctx,
1702 const int warn_pwd_expire,
1703 struct wbcAuthErrorInfo **p_error,
1704 struct wbcLogonUserInfo **p_info,
1705 time_t *pwd_last_set,
1709 struct wbcLogonUserParams logon;
1710 char membership_of[1024];
1711 uid_t user_uid = -1;
1712 uint32_t flags = WBFLAG_PAM_INFO3_TEXT;
1713 struct wbcLogonUserInfo *info = NULL;
1714 struct wbcAuthUserInfo *user_info = NULL;
1715 struct wbcAuthErrorInfo *error = NULL;
1716 int ret = PAM_AUTH_ERR;
1718 const char *codes[] = {
1719 "NT_STATUS_PASSWORD_EXPIRED",
1720 "NT_STATUS_PASSWORD_MUST_CHANGE",
1721 "NT_STATUS_INVALID_WORKSTATION",
1722 "NT_STATUS_INVALID_LOGON_HOURS",
1723 "NT_STATUS_ACCOUNT_EXPIRED",
1724 "NT_STATUS_ACCOUNT_DISABLED",
1725 "NT_STATUS_ACCOUNT_LOCKED_OUT",
1726 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1727 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1728 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1729 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1730 "NT_STATUS_NO_LOGON_SERVERS",
1731 "NT_STATUS_WRONG_PASSWORD",
1732 "NT_STATUS_ACCESS_DENIED"
1739 /* Krb5 auth always has to go against the KDC of the user's realm */
1741 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1742 flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
1745 if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1746 struct passwd *pwd = NULL;
1748 pwd = getpwnam(user);
1750 return PAM_USER_UNKNOWN;
1752 user_uid = pwd->pw_uid;
1755 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1757 _pam_log_debug(ctx, LOG_DEBUG,
1758 "enabling krb5 login flag\n");
1760 flags |= WBFLAG_PAM_KRB5 |
1761 WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1764 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1765 _pam_log_debug(ctx, LOG_DEBUG,
1766 "enabling cached login flag\n");
1767 flags |= WBFLAG_PAM_CACHED_LOGIN;
1772 flags |= WBFLAG_PAM_UNIX_NAME;
1775 if (cctype != NULL) {
1776 _pam_log_debug(ctx, LOG_DEBUG,
1777 "enabling request for a %s krb5 ccache\n",
1781 if (member != NULL) {
1783 ZERO_STRUCT(membership_of);
1785 if (!winbind_name_list_to_sid_string_list(ctx, user, member,
1787 sizeof(membership_of))) {
1788 _pam_log_debug(ctx, LOG_ERR,
1789 "failed to serialize membership of sid "
1790 "\"%s\"\n", member);
1791 return PAM_AUTH_ERR;
1797 logon.username = user;
1798 logon.password = pass;
1801 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1805 discard_const_p(uint8_t, cctype),
1807 if (!WBC_ERROR_IS_OK(wbc_status)) {
1812 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1818 if (!WBC_ERROR_IS_OK(wbc_status)) {
1822 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1826 (uint8_t *)&user_uid,
1828 if (!WBC_ERROR_IS_OK(wbc_status)) {
1833 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1837 (uint8_t *)membership_of,
1838 sizeof(membership_of));
1839 if (!WBC_ERROR_IS_OK(wbc_status)) {
1844 wbc_status = wbcCtxLogonUser(ctx->wbc_ctx,
1849 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1850 user, "wbcLogonUser");
1851 wbcFreeMemory(logon.blobs);
1854 if (info && info->info) {
1855 user_info = info->info;
1858 if (pwd_last_set && user_info) {
1859 *pwd_last_set = user_info->pass_last_set_time;
1862 if (p_info && info) {
1866 if (p_error && error) {
1867 /* We want to process the error in the caller. */
1872 for (i=0; i<ARRAY_SIZE(codes); i++) {
1874 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1880 if ((ret == PAM_SUCCESS) && user_info && info) {
1882 bool already_expired = false;
1883 bool change_pwd = false;
1885 /* warn a user if the password is about to expire soon */
1886 _pam_warn_password_expiry(ctx, user_info,
1891 if (already_expired == true) {
1893 SMB_TIME_T last_set = user_info->pass_last_set_time;
1894 SMB_TIME_T must_set = user_info->pass_must_change_time;
1896 _pam_log_debug(ctx, LOG_DEBUG,
1897 "Password has expired "
1898 "(Password was last set: %lld, "
1899 "it must be changed here "
1900 "%lld (now it's: %ld))\n",
1901 (long long int)last_set,
1902 (long long int)must_set,
1905 return PAM_AUTHTOK_EXPIRED;
1909 ret = PAM_NEW_AUTHTOK_REQD;
1913 /* inform about logon type */
1914 _pam_warn_logon_type(ctx, user, user_info->user_flags);
1916 /* inform about krb5 failures */
1917 _pam_warn_krb5_failure(ctx, user, user_info->user_flags);
1919 /* set some info3 info for other modules in the stack */
1920 _pam_set_data_info3(ctx, user_info);
1922 /* put krb5ccname into env */
1923 _pam_setup_krb5_env(ctx, info);
1925 /* If winbindd returned a username, return the pointer to it
1927 _pam_setup_unix_username(ctx, user_ret, info);
1931 wbcFreeMemory(logon.blobs);
1932 if (info && info->blobs && !p_info) {
1933 wbcFreeMemory(info->blobs);
1935 * We set blobs to NULL to prevent a use after free in the
1936 * in the wbcLogonUserInfoDestructor
1940 if (error && !p_error) {
1941 wbcFreeMemory(error);
1943 if (info && !p_info) {
1944 wbcFreeMemory(info);
1950 /* talk to winbindd */
1951 static int winbind_chauthtok_request(struct pwb_context *ctx,
1953 const char *oldpass,
1954 const char *newpass,
1955 time_t pwd_last_set)
1958 struct wbcChangePasswordParams params;
1959 struct wbcAuthErrorInfo *error = NULL;
1960 struct wbcUserPasswordPolicyInfo *policy = NULL;
1961 enum wbcPasswordChangeRejectReason reject_reason = -1;
1965 const char *codes[] = {
1966 "NT_STATUS_BACKUP_CONTROLLER",
1967 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1968 "NT_STATUS_NO_LOGON_SERVERS",
1969 "NT_STATUS_ACCESS_DENIED",
1970 "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1971 "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1972 "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1974 int ret = PAM_AUTH_ERR;
1976 ZERO_STRUCT(params);
1978 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1979 flags |= WBFLAG_PAM_KRB5 |
1980 WBFLAG_PAM_CONTACT_TRUSTDOM;
1983 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1984 flags |= WBFLAG_PAM_CACHED_LOGIN;
1987 params.account_name = user;
1988 params.level = WBC_CHANGE_PASSWORD_LEVEL_PLAIN;
1989 params.old_password.plaintext = oldpass;
1990 params.new_password.plaintext = newpass;
1991 params.flags = flags;
1993 wbc_status = wbcCtxChangeUserPasswordEx(ctx->wbc_ctx,
1998 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1999 user, "wbcChangeUserPasswordEx");
2001 if (WBC_ERROR_IS_OK(wbc_status)) {
2002 _pam_log(ctx, LOG_NOTICE,
2003 "user '%s' password changed", user);
2008 wbcFreeMemory(policy);
2012 for (i=0; i<ARRAY_SIZE(codes); i++) {
2014 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
2020 if (!strcasecmp(error->nt_string,
2021 "NT_STATUS_PASSWORD_RESTRICTION")) {
2023 char *pwd_restriction_string = NULL;
2024 SMB_TIME_T min_pwd_age = 0;
2027 min_pwd_age = policy->min_passwordage;
2030 /* FIXME: avoid to send multiple PAM messages after another */
2031 switch ((int)reject_reason) {
2034 case WBC_PWD_CHANGE_NO_ERROR:
2035 if ((min_pwd_age > 0) &&
2036 (pwd_last_set + min_pwd_age > time(NULL))) {
2037 PAM_WB_REMARK_DIRECT(ctx,
2038 "NT_STATUS_PWD_TOO_RECENT");
2041 case WBC_PWD_CHANGE_PASSWORD_TOO_SHORT:
2042 PAM_WB_REMARK_DIRECT(ctx,
2043 "NT_STATUS_PWD_TOO_SHORT");
2045 case WBC_PWD_CHANGE_PWD_IN_HISTORY:
2046 PAM_WB_REMARK_DIRECT(ctx,
2047 "NT_STATUS_PWD_HISTORY_CONFLICT");
2049 case WBC_PWD_CHANGE_NOT_COMPLEX:
2050 _make_remark(ctx, PAM_ERROR_MSG,
2051 _("Password does not meet "
2052 "complexity requirements"));
2055 _pam_log_debug(ctx, LOG_DEBUG,
2056 "unknown password change "
2057 "reject reason: %d",
2062 pwd_restriction_string =
2063 _pam_compose_pwd_restriction_string(ctx, policy);
2064 if (pwd_restriction_string) {
2065 _make_remark(ctx, PAM_ERROR_MSG,
2066 pwd_restriction_string);
2067 TALLOC_FREE(pwd_restriction_string);
2071 wbcFreeMemory(error);
2072 wbcFreeMemory(policy);
2078 * Checks if a user has an account
2081 * 1 = User not found
2085 static int valid_user(struct pwb_context *ctx,
2088 /* check not only if the user is available over NSS calls, also make
2089 * sure it's really a winbind user, this is important when stacking PAM
2090 * modules in the 'account' or 'password' facility. */
2093 struct passwd *pwd = NULL;
2094 struct passwd *wb_pwd = NULL;
2096 pwd = getpwnam(user);
2101 wbc_status = wbcCtxGetpwnam(ctx->wbc_ctx, user, &wb_pwd);
2102 wbcFreeMemory(wb_pwd);
2103 if (!WBC_ERROR_IS_OK(wbc_status)) {
2104 _pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
2105 wbcErrorString(wbc_status));
2108 switch (wbc_status) {
2109 case WBC_ERR_UNKNOWN_USER:
2110 /* match other insane libwbclient return codes */
2111 case WBC_ERR_WINBIND_NOT_AVAILABLE:
2112 case WBC_ERR_DOMAIN_NOT_FOUND:
2114 case WBC_ERR_SUCCESS:
2122 static char *_pam_delete(register char *xx)
2130 * obtain a password from the user
2133 static int _winbind_read_password(struct pwb_context *ctx,
2135 const char *comment,
2136 const char *prompt1,
2137 const char *prompt2,
2145 _pam_log(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
2148 * make sure nothing inappropriate gets returned
2151 *pass = token = NULL;
2154 * which authentication token are we getting?
2157 if (on(WINBIND__OLD_PASSWORD, ctrl)) {
2158 authtok_flag = PAM_OLDAUTHTOK;
2160 authtok_flag = PAM_AUTHTOK;
2164 * should we obtain the password from a PAM item ?
2167 if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
2168 on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2169 retval = pam_get_item(ctx->pamh,
2171 (const void **) &item);
2172 if (retval != PAM_SUCCESS) {
2174 _pam_log(ctx, LOG_ALERT,
2175 "pam_get_item returned error "
2176 "to unix-read-password");
2178 } else if (item != NULL) { /* we have a password! */
2181 _pam_log(ctx, LOG_DEBUG,
2182 "pam_get_item returned a password");
2184 } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2185 return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
2186 } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
2187 && off(WINBIND__OLD_PASSWORD, ctrl)) {
2188 return PAM_AUTHTOK_RECOVER_ERR;
2192 * getting here implies we will have to get the password from the
2197 struct pam_message msg[3];
2198 const struct pam_message *pmsg[3];
2199 struct pam_response *resp;
2202 /* prepare to converse */
2204 if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
2206 msg[0].msg_style = PAM_TEXT_INFO;
2207 msg[0].msg = discard_const_p(char, comment);
2214 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2215 msg[i++].msg = discard_const_p(char, prompt1);
2218 if (prompt2 != NULL) {
2220 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2221 msg[i++].msg = discard_const_p(char, prompt2);
2224 /* so call the conversation expecting i responses */
2226 retval = converse(ctx->pamh, i, pmsg, &resp);
2228 if (retval == PAM_SUCCESS) {
2229 retval = PAM_AUTHTOK_RECOVER_ERR;
2233 if (retval != PAM_SUCCESS) {
2234 _pam_drop_reply(resp, i);
2238 /* interpret the response */
2240 token = x_strdup(resp[i - replies].resp);
2242 _pam_log(ctx, LOG_NOTICE,
2243 "could not recover "
2244 "authentication token");
2245 retval = PAM_AUTHTOK_RECOVER_ERR;
2250 /* verify that password entered correctly */
2251 if (!resp[i - 1].resp ||
2252 strcmp(token, resp[i - 1].resp)) {
2253 _pam_delete(token); /* mistyped */
2254 retval = PAM_AUTHTOK_RECOVER_ERR;
2255 _make_remark(ctx, PAM_ERROR_MSG,
2261 * tidy up the conversation (resp_retcode) is ignored
2262 * -- what is it for anyway? AGM
2264 _pam_drop_reply(resp, i);
2268 if (retval != PAM_SUCCESS) {
2269 _pam_log_debug(ctx, LOG_DEBUG,
2270 "unable to obtain a password");
2273 /* 'token' is the entered password */
2275 /* we store this password as an item */
2277 retval = pam_set_item(ctx->pamh, authtok_flag, token);
2278 _pam_delete(token); /* clean it up */
2279 if (retval != PAM_SUCCESS ||
2280 (retval = pam_get_item(ctx->pamh, authtok_flag, (const void **) &item)) != PAM_SUCCESS) {
2282 _pam_log(ctx, LOG_CRIT, "error manipulating password");
2288 item = NULL; /* break link to password */
2293 static const char *get_conf_item_string(struct pwb_context *ctx,
2298 const char *parm_opt = NULL;
2300 if (!(ctx->ctrl & config_flag)) {
2304 /* let the pam opt take precedence over the pam_winbind.conf option */
2305 for (i=0; i<ctx->argc; i++) {
2307 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2310 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2311 _pam_log(ctx, LOG_INFO,
2312 "no \"=\" delimiter for \"%s\" found\n",
2316 _pam_log_debug(ctx, LOG_INFO,
2317 "PAM config: %s '%s'\n", item, p+1);
2325 key = talloc_asprintf(ctx, "global:%s", item);
2330 parm_opt = tiniparser_getstring_nonempty(ctx->dict, key, NULL);
2333 _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
2340 static int get_config_item_int(struct pwb_context *ctx,
2344 int i, parm_opt = -1;
2346 if (!(ctx->ctrl & config_flag)) {
2350 /* let the pam opt take precedence over the pam_winbind.conf option */
2351 for (i = 0; i < ctx->argc; i++) {
2353 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2356 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2357 _pam_log(ctx, LOG_INFO,
2358 "no \"=\" delimiter for \"%s\" found\n",
2362 parm_opt = atoi(p + 1);
2363 _pam_log_debug(ctx, LOG_INFO,
2364 "PAM config: %s '%d'\n",
2373 key = talloc_asprintf(ctx, "global:%s", item);
2378 parm_opt = tiniparser_getint(ctx->dict, key, -1);
2381 _pam_log_debug(ctx, LOG_INFO,
2382 "CONFIG file: %s '%d'\n",
2389 static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
2391 return get_conf_item_string(ctx, "krb5_ccache_type",
2392 WINBIND_KRB5_CCACHE_TYPE);
2395 static const char *get_member_from_config(struct pwb_context *ctx)
2397 const char *ret = NULL;
2398 ret = get_conf_item_string(ctx, "require_membership_of",
2399 WINBIND_REQUIRED_MEMBERSHIP);
2403 return get_conf_item_string(ctx, "require-membership-of",
2404 WINBIND_REQUIRED_MEMBERSHIP);
2407 static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
2410 ret = get_config_item_int(ctx, "warn_pwd_expire",
2411 WINBIND_WARN_PWD_EXPIRE);
2412 /* no or broken setting */
2414 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
2420 * Retrieve the winbind separator.
2422 * @param ctx PAM winbind context.
2424 * @return string separator character. NULL on failure.
2427 static char winbind_get_separator(struct pwb_context *ctx)
2430 static struct wbcInterfaceDetails *details = NULL;
2432 wbc_status = wbcCtxInterfaceDetails(ctx->wbc_ctx, &details);
2433 if (!WBC_ERROR_IS_OK(wbc_status)) {
2434 _pam_log(ctx, LOG_ERR,
2435 "Could not retrieve winbind interface details: %s",
2436 wbcErrorString(wbc_status));
2444 return details->winbind_separator;
2449 * Convert a upn to a name.
2451 * @param ctx PAM winbind context.
2452 * @param upn User UPN to be translated.
2454 * @return converted name. NULL pointer on failure. Caller needs to free.
2457 static char* winbind_upn_to_username(struct pwb_context *ctx,
2461 wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
2462 struct wbcDomainSid sid;
2463 enum wbcSidType type;
2464 char *domain = NULL;
2469 /* This cannot work when the winbind separator = @ */
2471 sep = winbind_get_separator(ctx);
2472 if (!sep || sep == '@') {
2476 name = talloc_strdup(ctx, upn);
2481 p = strchr(name, '@');
2489 /* Convert the UPN to a SID */
2491 wbc_status = wbcCtxLookupName(ctx->wbc_ctx, domain, name, &sid, &type);
2492 if (!WBC_ERROR_IS_OK(wbc_status)) {
2496 /* Convert the the SID back to the sAMAccountName */
2498 wbc_status = wbcCtxLookupSid(ctx->wbc_ctx, &sid, &domain, &name, &type);
2499 if (!WBC_ERROR_IS_OK(wbc_status)) {
2503 result = talloc_asprintf(ctx, "%s%c%s", domain, sep, name);
2504 wbcFreeMemory(domain);
2505 wbcFreeMemory(name);
2509 static int _pam_delete_cred(pam_handle_t *pamh, int flags,
2510 int argc, enum pam_winbind_request_type type,
2513 int retval = PAM_SUCCESS;
2514 struct pwb_context *ctx = NULL;
2515 struct wbcLogoffUserParams logoff;
2516 struct wbcAuthErrorInfo *error = NULL;
2518 wbcErr wbc_status = WBC_ERR_SUCCESS;
2520 ZERO_STRUCT(logoff);
2522 retval = _pam_winbind_init_context(pamh, flags, argc, argv, type, &ctx);
2523 if (retval != PAM_SUCCESS) {
2527 _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
2529 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2531 /* destroy the ccache here */
2533 uint32_t wbc_flags = 0;
2534 const char *ccname = NULL;
2535 struct passwd *pwd = NULL;
2537 retval = pam_get_user(pamh, &user, _("Username: "));
2538 if (retval != PAM_SUCCESS) {
2539 _pam_log(ctx, LOG_ERR,
2540 "could not identify user");
2545 _pam_log(ctx, LOG_ERR,
2546 "username was NULL!");
2547 retval = PAM_USER_UNKNOWN;
2551 _pam_log_debug(ctx, LOG_DEBUG,
2552 "username [%s] obtained", user);
2554 ccname = pam_getenv(pamh, "KRB5CCNAME");
2555 if (ccname == NULL) {
2556 _pam_log_debug(ctx, LOG_DEBUG,
2557 "user has no KRB5CCNAME environment");
2560 pwd = getpwnam(user);
2562 retval = PAM_USER_UNKNOWN;
2566 wbc_flags = WBFLAG_PAM_KRB5 |
2567 WBFLAG_PAM_CONTACT_TRUSTDOM;
2569 logoff.username = user;
2572 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2576 discard_const_p(uint8_t, ccname),
2578 if (!WBC_ERROR_IS_OK(wbc_status)) {
2583 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2587 (uint8_t *)&wbc_flags,
2589 if (!WBC_ERROR_IS_OK(wbc_status)) {
2593 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2597 (uint8_t *)&pwd->pw_uid,
2598 sizeof(pwd->pw_uid));
2599 if (!WBC_ERROR_IS_OK(wbc_status)) {
2603 wbc_status = wbcCtxLogoffUserEx(ctx->wbc_ctx, &logoff, &error);
2604 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2605 user, "wbcLogoffUser");
2606 wbcFreeMemory(error);
2607 wbcFreeMemory(logoff.blobs);
2608 logoff.blobs = NULL;
2610 if (!WBC_ERROR_IS_OK(wbc_status)) {
2611 _pam_log(ctx, LOG_INFO,
2612 "failed to logoff user %s: %s\n",
2613 user, wbcErrorString(wbc_status));
2619 wbcFreeMemory(logoff.blobs);
2622 if (!WBC_ERROR_IS_OK(wbc_status)) {
2623 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2624 user, "wbcLogoffUser");
2628 * Delete the krb5 ccname variable from the PAM environment
2629 * if it was set by winbind.
2631 if ((ctx->ctrl & WINBIND_KRB5_AUTH) && pam_getenv(pamh, "KRB5CCNAME")) {
2632 pam_putenv(pamh, "KRB5CCNAME");
2635 _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx, retval);
2643 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
2644 int argc, const char **argv)
2646 const char *username;
2647 const char *password;
2648 const char *member = NULL;
2649 const char *cctype = NULL;
2650 int warn_pwd_expire;
2651 int retval = PAM_AUTH_ERR;
2652 char *username_ret = NULL;
2653 char *new_authtok_required = NULL;
2654 char *real_username = NULL;
2655 struct pwb_context *ctx = NULL;
2657 retval = _pam_winbind_init_context(pamh, flags, argc, argv,
2658 PAM_WINBIND_AUTHENTICATE, &ctx);
2659 if (retval != PAM_SUCCESS) {
2663 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
2665 /* Get the username */
2666 retval = pam_get_user(pamh, &username, NULL);
2667 if ((retval != PAM_SUCCESS) || (!username)) {
2668 _pam_log_debug(ctx, LOG_DEBUG,
2669 "can not get the username");
2670 retval = PAM_SERVICE_ERR;
2676 /* Decode the user name since AIX does not support logn user
2677 names by default. The name is encoded as _#uid. */
2679 if (username[0] == '_') {
2680 uid_t id = atoi(&username[1]);
2681 struct passwd *pw = NULL;
2683 if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
2684 real_username = strdup(pw->pw_name);
2689 if (!real_username) {
2690 /* Just making a copy of the username we got from PAM */
2691 if ((real_username = strdup(username)) == NULL) {
2692 _pam_log_debug(ctx, LOG_DEBUG,
2693 "memory allocation failure when copying "
2695 retval = PAM_SERVICE_ERR;
2700 /* Maybe this was a UPN */
2702 if (strchr(real_username, '@') != NULL) {
2703 char *samaccountname = NULL;
2705 samaccountname = winbind_upn_to_username(ctx,
2707 if (samaccountname) {
2708 free(real_username);
2709 real_username = strdup(samaccountname);
2713 retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
2714 _("Password: "), NULL,
2717 if (retval != PAM_SUCCESS) {
2718 _pam_log(ctx, LOG_ERR,
2719 "Could not retrieve user's password");
2720 retval = PAM_AUTHTOK_ERR;
2724 /* Let's not give too much away in the log file */
2726 #ifdef DEBUG_PASSWORD
2727 _pam_log_debug(ctx, LOG_INFO,
2728 "Verify user '%s' with password '%s'",
2729 real_username, password);
2731 _pam_log_debug(ctx, LOG_INFO,
2732 "Verify user '%s'", real_username);
2735 member = get_member_from_config(ctx);
2736 cctype = get_krb5_cc_type_from_config(ctx);
2737 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2739 /* Now use the username to look up password */
2740 retval = winbind_auth_request(ctx, real_username, password,
2741 member, cctype, warn_pwd_expire,
2742 NULL, NULL, NULL, &username_ret);
2744 if (retval == PAM_NEW_AUTHTOK_REQD ||
2745 retval == PAM_AUTHTOK_EXPIRED) {
2747 char *new_authtok_required_during_auth = NULL;
2749 new_authtok_required = talloc_asprintf(NULL, "%d", retval);
2750 if (!new_authtok_required) {
2751 retval = PAM_BUF_ERR;
2755 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2756 new_authtok_required,
2757 _pam_winbind_cleanup_func);
2759 retval = PAM_SUCCESS;
2761 new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
2762 if (!new_authtok_required_during_auth) {
2763 retval = PAM_BUF_ERR;
2767 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2768 new_authtok_required_during_auth,
2769 _pam_winbind_cleanup_func);
2776 pam_set_item (pamh, PAM_USER, username_ret);
2777 _pam_log_debug(ctx, LOG_INFO,
2778 "Returned user was '%s'", username_ret);
2782 if (real_username) {
2783 free(real_username);
2786 if (!new_authtok_required) {
2787 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2790 if (retval != PAM_SUCCESS) {
2791 _pam_free_data_info3(pamh);
2794 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
2802 int pam_sm_setcred(pam_handle_t *pamh, int flags,
2803 int argc, const char **argv)
2805 int ret = PAM_SYSTEM_ERR;
2806 struct pwb_context *ctx = NULL;
2808 ret = _pam_winbind_init_context(pamh, flags, argc, argv,
2809 PAM_WINBIND_SETCRED, &ctx);
2810 if (ret != PAM_SUCCESS) {
2814 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
2816 switch (flags & ~PAM_SILENT) {
2818 case PAM_DELETE_CRED:
2819 ret = _pam_delete_cred(pamh, flags, argc,
2820 PAM_WINBIND_SETCRED, argv);
2822 case PAM_REFRESH_CRED:
2823 _pam_log_debug(ctx, LOG_WARNING,
2824 "PAM_REFRESH_CRED not implemented");
2827 case PAM_REINITIALIZE_CRED:
2828 _pam_log_debug(ctx, LOG_WARNING,
2829 "PAM_REINITIALIZE_CRED not implemented");
2832 case PAM_ESTABLISH_CRED:
2833 _pam_log_debug(ctx, LOG_WARNING,
2834 "PAM_ESTABLISH_CRED not implemented");
2838 ret = PAM_SYSTEM_ERR;
2842 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
2850 * Account management. We want to verify that the account exists
2851 * before returning PAM_SUCCESS
2854 int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2855 int argc, const char **argv)
2857 const char *username;
2858 int ret = PAM_USER_UNKNOWN;
2859 const char *tmp = NULL;
2860 struct pwb_context *ctx = NULL;
2862 ret = _pam_winbind_init_context(pamh, flags, argc, argv,
2863 PAM_WINBIND_ACCT_MGMT, &ctx);
2864 if (ret != PAM_SUCCESS) {
2868 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
2871 /* Get the username */
2872 ret = pam_get_user(pamh, &username, NULL);
2873 if ((ret != PAM_SUCCESS) || (!username)) {
2874 _pam_log_debug(ctx, LOG_DEBUG,
2875 "can not get the username");
2876 ret = PAM_SERVICE_ERR;
2880 /* Verify the username */
2881 ret = valid_user(ctx, username);
2884 /* some sort of system error. The log was already printed */
2885 ret = PAM_SERVICE_ERR;
2888 /* the user does not exist */
2889 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
2891 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
2895 ret = PAM_USER_UNKNOWN;
2898 pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2899 (const void **)&tmp);
2903 case PAM_AUTHTOK_EXPIRED:
2904 /* Since new token is required in this case */
2906 case PAM_NEW_AUTHTOK_REQD:
2907 _pam_log(ctx, LOG_WARNING,
2908 "pam_sm_acct_mgmt success but %s is set",
2909 PAM_WINBIND_NEW_AUTHTOK_REQD);
2910 _pam_log(ctx, LOG_NOTICE,
2911 "user '%s' needs new password",
2913 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2914 ret = PAM_NEW_AUTHTOK_REQD;
2917 _pam_log(ctx, LOG_WARNING,
2918 "pam_sm_acct_mgmt success");
2919 _pam_log(ctx, LOG_NOTICE,
2920 "user '%s' granted access", username);
2926 /* Otherwise, the authentication looked good */
2927 _pam_log(ctx, LOG_NOTICE,
2928 "user '%s' granted access", username);
2932 /* we don't know anything about this return value */
2933 _pam_log(ctx, LOG_ERR,
2934 "internal module error (ret = %d, user = '%s')",
2936 ret = PAM_SERVICE_ERR;
2940 /* should not be reached */
2945 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
2953 int pam_sm_open_session(pam_handle_t *pamh, int flags,
2954 int argc, const char **argv)
2956 int ret = PAM_SUCCESS;
2957 struct pwb_context *ctx = NULL;
2959 ret = _pam_winbind_init_context(pamh, flags, argc, argv,
2960 PAM_WINBIND_OPEN_SESSION, &ctx);
2961 if (ret != PAM_SUCCESS) {
2965 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
2967 if (ctx->ctrl & WINBIND_MKHOMEDIR) {
2968 /* check and create homedir */
2969 ret = _pam_mkhomedir(ctx);
2972 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
2980 int pam_sm_close_session(pam_handle_t *pamh, int flags,
2981 int argc, const char **argv)
2983 int ret = PAM_SUCCESS;
2984 struct pwb_context *ctx = NULL;
2986 ret = _pam_winbind_init_context(pamh, flags, argc, argv,
2987 PAM_WINBIND_CLOSE_SESSION, &ctx);
2988 if (ret != PAM_SUCCESS) {
2992 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
2994 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
3002 * evaluate whether we need to re-authenticate with kerberos after a
3005 * @param ctx PAM winbind context.
3006 * @param user The username
3008 * @return boolean Returns true if required, false if not.
3011 static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
3015 /* Make sure that we only do this if a) the chauthtok got initiated
3016 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
3017 * later password change via the "passwd" command if done by the user
3019 * NB. If we login from gdm or xdm and the password expires,
3020 * we change the password, but there is no memory cache.
3021 * Thus, even for passthrough login, we should do the
3022 * authentication again to update memory cache.
3026 const char *new_authtok_reqd_during_auth = NULL;
3027 struct passwd *pwd = NULL;
3029 pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
3030 (const void **) &new_authtok_reqd_during_auth);
3031 pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
3034 if (new_authtok_reqd_during_auth) {
3038 pwd = getpwnam(user);
3043 if (getuid() == pwd->pw_uid) {
3052 int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
3053 int argc, const char **argv)
3057 bool cached_login = false;
3059 /* <DO NOT free() THESE> */
3061 const char *pass_old;
3062 const char *pass_new;
3063 /* </DO NOT free() THESE> */
3068 char *username_ret = NULL;
3069 struct wbcAuthErrorInfo *error = NULL;
3070 struct pwb_context *ctx = NULL;
3072 ret = _pam_winbind_init_context(pamh, flags, argc, argv,
3073 PAM_WINBIND_CHAUTHTOK, &ctx);
3074 if (ret != PAM_SUCCESS) {
3078 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
3080 cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
3082 /* clearing offline bit for auth */
3083 ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
3086 * First get the name of a user
3088 ret = pam_get_user(pamh, &user, _("Username: "));
3089 if (ret != PAM_SUCCESS) {
3090 _pam_log(ctx, LOG_ERR,
3091 "password - could not identify user");
3096 _pam_log(ctx, LOG_ERR, "username was NULL!");
3097 ret = PAM_USER_UNKNOWN;
3101 _pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
3103 /* check if this is really a user in winbindd, not only in NSS */
3104 ret = valid_user(ctx, user);
3107 ret = PAM_USER_UNKNOWN;
3110 ret = PAM_SYSTEM_ERR;
3117 * obtain and verify the current password (OLDAUTHTOK) for
3121 if (flags & PAM_PRELIM_CHECK) {
3122 time_t pwdlastset_prelim = 0;
3124 /* instruct user what is happening */
3126 #define greeting _("Changing password for")
3127 Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
3129 _pam_log(ctx, LOG_CRIT,
3130 "password - out of memory");
3136 lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
3137 ret = _winbind_read_password(ctx, lctrl,
3139 _("(current) NT password: "),
3141 (const char **) &pass_old);
3142 TALLOC_FREE(Announce);
3143 if (ret != PAM_SUCCESS) {
3144 _pam_log(ctx, LOG_NOTICE,
3145 "password - (old) token not obtained");
3149 /* verify that this is the password for this user */
3151 ret = winbind_auth_request(ctx, user, pass_old,
3154 &pwdlastset_prelim, NULL);
3156 if (ret != PAM_ACCT_EXPIRED &&
3157 ret != PAM_AUTHTOK_EXPIRED &&
3158 ret != PAM_NEW_AUTHTOK_REQD &&
3159 ret != PAM_SUCCESS) {
3164 pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3165 (void *)pwdlastset_prelim, NULL);
3167 ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
3168 (const void *) pass_old);
3170 if (ret != PAM_SUCCESS) {
3171 _pam_log(ctx, LOG_CRIT,
3172 "failed to set PAM_OLDAUTHTOK");
3174 } else if (flags & PAM_UPDATE_AUTHTOK) {
3176 time_t pwdlastset_update = 0;
3179 * obtain the proposed password
3183 * get the old token back.
3186 ret = pam_get_item(pamh, PAM_OLDAUTHTOK, (const void **) &pass_old);
3188 if (ret != PAM_SUCCESS) {
3189 _pam_log(ctx, LOG_NOTICE,
3190 "user not authenticated");
3194 lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
3196 if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
3197 lctrl |= WINBIND_USE_FIRST_PASS_ARG;
3199 if (on(WINBIND_TRY_AUTHTOK_ARG, lctrl)) {
3200 lctrl |= WINBIND_TRY_FIRST_PASS_ARG;
3203 ret = PAM_AUTHTOK_ERR;
3204 while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
3206 * use_authtok is to force the use of a previously entered
3207 * password -- needed for pluggable password strength checking
3210 ret = _winbind_read_password(ctx, lctrl,
3212 _("Enter new NT password: "),
3213 _("Retype new NT password: "),
3214 (const char **)&pass_new);
3216 if (ret != PAM_SUCCESS) {
3217 _pam_log_debug(ctx, LOG_ALERT,
3219 "new password not obtained");
3220 pass_old = NULL;/* tidy up */
3225 * At this point we know who the user is and what they
3226 * propose as their new password. Verify that the new
3227 * password is acceptable.
3230 if (pass_new[0] == '\0') {/* "\0" password = NULL */
3236 * By reaching here we have approved the passwords and must now
3237 * rebuild the password database file.
3239 pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3240 (const void **) &pwdlastset_update);
3243 * if cached creds were enabled, make sure to set the
3244 * WINBIND_CACHED_LOGIN bit here in order to have winbindd
3245 * update the cached creds storage - gd
3248 ctx->ctrl |= WINBIND_CACHED_LOGIN;
3251 ret = winbind_chauthtok_request(ctx, user, pass_old,
3252 pass_new, pwdlastset_update);
3253 if (ret != PAM_SUCCESS) {
3254 pass_old = pass_new = NULL;
3258 if (_pam_require_krb5_auth_after_chauthtok(ctx, user)) {
3260 const char *member = NULL;
3261 const char *cctype = NULL;
3262 int warn_pwd_expire;
3263 struct wbcLogonUserInfo *info = NULL;
3265 member = get_member_from_config(ctx);
3266 cctype = get_krb5_cc_type_from_config(ctx);
3267 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
3269 /* Keep WINBIND_CACHED_LOGIN bit for
3270 * authentication after changing the password.
3271 * This will update the cached credentials in case
3272 * that winbindd_dual_pam_chauthtok() fails
3277 ret = winbind_auth_request(ctx, user, pass_new,
3280 NULL, &username_ret);
3281 pass_old = pass_new = NULL;
3283 if (ret == PAM_SUCCESS) {
3285 struct wbcAuthUserInfo *user_info = NULL;
3287 if (info && info->info) {
3288 user_info = info->info;
3291 /* warn a user if the password is about to
3293 _pam_warn_password_expiry(ctx, user_info,
3297 /* set some info3 info for other modules in the
3299 _pam_set_data_info3(ctx, user_info);
3301 /* put krb5ccname into env */
3302 _pam_setup_krb5_env(ctx, info);
3305 pam_set_item(pamh, PAM_USER,
3307 _pam_log_debug(ctx, LOG_INFO,
3308 "Returned user was '%s'",
3315 if (info && info->blobs) {
3316 wbcFreeMemory(info->blobs);
3318 wbcFreeMemory(info);
3323 ret = PAM_SERVICE_ERR;
3328 /* Deal with offline errors. */
3330 const char *codes[] = {
3331 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3332 "NT_STATUS_NO_LOGON_SERVERS",
3333 "NT_STATUS_ACCESS_DENIED"
3336 for (i=0; i<ARRAY_SIZE(codes); i++) {
3338 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
3344 wbcFreeMemory(error);
3346 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
3355 /* static module data */
3357 struct pam_module _pam_winbind_modstruct = {
3359 pam_sm_authenticate,
3362 pam_sm_open_session,
3363 pam_sm_close_session,
3370 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3371 * Copyright (c) Tim Potter <tpot@samba.org> 2000
3372 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3373 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3374 * Copyright (c) Jan Rêkorajski 1999.
3375 * Copyright (c) Andrew G. Morgan 1996-8.
3376 * Copyright (c) Alex O. Yuriev, 1996.
3377 * Copyright (c) Cristian Gafton 1996.
3378 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3380 * Redistribution and use in source and binary forms, with or without
3381 * modification, are permitted provided that the following conditions
3383 * 1. Redistributions of source code must retain the above copyright
3384 * notice, and the entire permission notice in its entirety,
3385 * including the disclaimer of warranties.
3386 * 2. Redistributions in binary form must reproduce the above copyright
3387 * notice, this list of conditions and the following disclaimer in the
3388 * documentation and/or other materials provided with the distribution.
3389 * 3. The name of the author may not be used to endorse or promote
3390 * products derived from this software without specific prior
3391 * written permission.
3393 * ALTERNATIVELY, this product may be distributed under the terms of
3394 * the GNU Public License, in which case the provisions of the GPL are
3395 * required INSTEAD OF the above restrictions. (This clause is
3396 * necessary due to a potential bad interaction between the GPL and
3397 * the restrictions contained in a BSD-style copyright.)
3399 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3400 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3401 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3402 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3403 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3404 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3405 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3406 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3407 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3408 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3409 * OF THE POSSIBILITY OF SUCH DAMAGE.