source3/libnet/libnet_join.h: fix licence/copyright
[Samba.git] / nsswitch / pam_winbind.c
blob7005c25fae4d669dbed90b8d17f2ec54ddee1271
1 /* pam_winbind module
3 Copyright Andrew Tridgell <tridge@samba.org> 2000
4 Copyright Tim Potter <tpot@samba.org> 2000
5 Copyright Andrew Bartlett <abartlet@samba.org> 2002
6 Copyright Guenther Deschner <gd@samba.org> 2005-2008
8 largely based on pam_userdb by Cristian Gafton <gafton@redhat.com> also
9 contains large slabs of code from pam_unix by Elliot Lee
10 <sopwith@redhat.com> (see copyright below for full details)
13 #include "pam_winbind.h"
14 #define CONST_DISCARD(type,ptr) ((type)(void *)ptr)
17 static int wbc_error_to_pam_error(wbcErr status)
19 switch (status) {
20 case WBC_ERR_SUCCESS:
21 return PAM_SUCCESS;
22 case WBC_ERR_NOT_IMPLEMENTED:
23 return PAM_SERVICE_ERR;
24 case WBC_ERR_UNKNOWN_FAILURE:
25 break;
26 case WBC_ERR_NO_MEMORY:
27 return PAM_BUF_ERR;
28 case WBC_ERR_INVALID_SID:
29 case WBC_ERR_INVALID_PARAM:
30 break;
31 case WBC_ERR_WINBIND_NOT_AVAILABLE:
32 return PAM_AUTHINFO_UNAVAIL;
33 case WBC_ERR_DOMAIN_NOT_FOUND:
34 return PAM_AUTHINFO_UNAVAIL;
35 case WBC_ERR_INVALID_RESPONSE:
36 return PAM_BUF_ERR;
37 case WBC_ERR_NSS_ERROR:
38 return PAM_USER_UNKNOWN;
39 case WBC_ERR_AUTH_ERROR:
40 return PAM_AUTH_ERR;
41 case WBC_ERR_UNKNOWN_USER:
42 return PAM_USER_UNKNOWN;
43 case WBC_ERR_UNKNOWN_GROUP:
44 return PAM_USER_UNKNOWN;
45 case WBC_ERR_PWD_CHANGE_FAILED:
46 break;
49 /* be paranoid */
50 return PAM_AUTH_ERR;
53 static const char *_pam_error_code_str(int err)
55 switch (err) {
56 case PAM_SUCCESS:
57 return "PAM_SUCCESS";
58 case PAM_OPEN_ERR:
59 return "PAM_OPEN_ERR";
60 case PAM_SYMBOL_ERR:
61 return "PAM_SYMBOL_ERR";
62 case PAM_SERVICE_ERR:
63 return "PAM_SERVICE_ERR";
64 case PAM_SYSTEM_ERR:
65 return "PAM_SYSTEM_ERR";
66 case PAM_BUF_ERR:
67 return "PAM_BUF_ERR";
68 case PAM_PERM_DENIED:
69 return "PAM_PERM_DENIED";
70 case PAM_AUTH_ERR:
71 return "PAM_AUTH_ERR";
72 case PAM_CRED_INSUFFICIENT:
73 return "PAM_CRED_INSUFFICIENT";
74 case PAM_AUTHINFO_UNAVAIL:
75 return "PAM_AUTHINFO_UNAVAIL";
76 case PAM_USER_UNKNOWN:
77 return "PAM_USER_UNKNOWN";
78 case PAM_MAXTRIES:
79 return "PAM_MAXTRIES";
80 case PAM_NEW_AUTHTOK_REQD:
81 return "PAM_NEW_AUTHTOK_REQD";
82 case PAM_ACCT_EXPIRED:
83 return "PAM_ACCT_EXPIRED";
84 case PAM_SESSION_ERR:
85 return "PAM_SESSION_ERR";
86 case PAM_CRED_UNAVAIL:
87 return "PAM_CRED_UNAVAIL";
88 case PAM_CRED_EXPIRED:
89 return "PAM_CRED_EXPIRED";
90 case PAM_CRED_ERR:
91 return "PAM_CRED_ERR";
92 case PAM_NO_MODULE_DATA:
93 return "PAM_NO_MODULE_DATA";
94 case PAM_CONV_ERR:
95 return "PAM_CONV_ERR";
96 case PAM_AUTHTOK_ERR:
97 return "PAM_AUTHTOK_ERR";
98 case PAM_AUTHTOK_RECOVER_ERR:
99 return "PAM_AUTHTOK_RECOVER_ERR";
100 case PAM_AUTHTOK_LOCK_BUSY:
101 return "PAM_AUTHTOK_LOCK_BUSY";
102 case PAM_AUTHTOK_DISABLE_AGING:
103 return "PAM_AUTHTOK_DISABLE_AGING";
104 case PAM_TRY_AGAIN:
105 return "PAM_TRY_AGAIN";
106 case PAM_IGNORE:
107 return "PAM_IGNORE";
108 case PAM_ABORT:
109 return "PAM_ABORT";
110 case PAM_AUTHTOK_EXPIRED:
111 return "PAM_AUTHTOK_EXPIRED";
112 #ifdef PAM_MODULE_UNKNOWN
113 case PAM_MODULE_UNKNOWN:
114 return "PAM_MODULE_UNKNOWN";
115 #endif
116 #ifdef PAM_BAD_ITEM
117 case PAM_BAD_ITEM:
118 return "PAM_BAD_ITEM";
119 #endif
120 #ifdef PAM_CONV_AGAIN
121 case PAM_CONV_AGAIN:
122 return "PAM_CONV_AGAIN";
123 #endif
124 #ifdef PAM_INCOMPLETE
125 case PAM_INCOMPLETE:
126 return "PAM_INCOMPLETE";
127 #endif
128 default:
129 return NULL;
133 #define _PAM_LOG_FUNCTION_ENTER(function, ctx) \
134 do { \
135 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] ENTER: " \
136 function " (flags: 0x%04x)", ctx->pamh, ctx->flags); \
137 _pam_log_state(ctx); \
138 } while (0)
140 #define _PAM_LOG_FUNCTION_LEAVE(function, ctx, retval) \
141 do { \
142 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] LEAVE: " \
143 function " returning %d (%s)", ctx->pamh, retval, \
144 _pam_error_code_str(retval)); \
145 _pam_log_state(ctx); \
146 } while (0)
148 /* data tokens */
150 #define MAX_PASSWD_TRIES 3
152 #ifdef HAVE_GETTEXT
153 static char initialized = 0;
155 static inline void textdomain_init(void);
156 static inline void textdomain_init(void)
158 if (!initialized) {
159 bindtextdomain(MODULE_NAME, LOCALEDIR);
160 initialized = 1;
162 return;
164 #endif
168 * Work around the pam API that has functions with void ** as parameters
169 * These lead to strict aliasing warnings with gcc.
171 static int _pam_get_item(const pam_handle_t *pamh,
172 int item_type,
173 const void *_item)
175 const void **item = (const void **)_item;
176 return pam_get_item(pamh, item_type, item);
178 static int _pam_get_data(const pam_handle_t *pamh,
179 const char *module_data_name,
180 const void *_data)
182 const void **data = (const void **)_data;
183 return pam_get_data(pamh, module_data_name, data);
186 /* some syslogging */
188 #ifdef HAVE_PAM_VSYSLOG
189 static void _pam_log_int(const pam_handle_t *pamh,
190 int err,
191 const char *format,
192 va_list args)
194 pam_vsyslog(pamh, err, format, args);
196 #else
197 static void _pam_log_int(const pam_handle_t *pamh,
198 int err,
199 const char *format,
200 va_list args)
202 char *format2 = NULL;
203 const char *service;
205 _pam_get_item(pamh, PAM_SERVICE, &service);
207 format2 = (char *)malloc(strlen(MODULE_NAME)+strlen(format)+strlen(service)+5);
208 if (format2 == NULL) {
209 /* what else todo ? */
210 vsyslog(err, format, args);
211 return;
214 sprintf(format2, "%s(%s): %s", MODULE_NAME, service, format);
215 vsyslog(err, format2, args);
216 SAFE_FREE(format2);
218 #endif /* HAVE_PAM_VSYSLOG */
220 static bool _pam_log_is_silent(int ctrl)
222 return on(ctrl, WINBIND_SILENT);
225 static void _pam_log(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
226 static void _pam_log(struct pwb_context *r, int err, const char *format, ...)
228 va_list args;
230 if (_pam_log_is_silent(r->ctrl)) {
231 return;
234 va_start(args, format);
235 _pam_log_int(r->pamh, err, format, args);
236 va_end(args);
238 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
239 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
241 va_list args;
243 if (_pam_log_is_silent(ctrl)) {
244 return;
247 va_start(args, format);
248 _pam_log_int(pamh, err, format, args);
249 va_end(args);
252 static bool _pam_log_is_debug_enabled(int ctrl)
254 if (ctrl == -1) {
255 return false;
258 if (_pam_log_is_silent(ctrl)) {
259 return false;
262 if (!(ctrl & WINBIND_DEBUG_ARG)) {
263 return false;
266 return true;
269 static bool _pam_log_is_debug_state_enabled(int ctrl)
271 if (!(ctrl & WINBIND_DEBUG_STATE)) {
272 return false;
275 return _pam_log_is_debug_enabled(ctrl);
278 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
279 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...)
281 va_list args;
283 if (!_pam_log_is_debug_enabled(r->ctrl)) {
284 return;
287 va_start(args, format);
288 _pam_log_int(r->pamh, err, format, args);
289 va_end(args);
291 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
292 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
294 va_list args;
296 if (!_pam_log_is_debug_enabled(ctrl)) {
297 return;
300 va_start(args, format);
301 _pam_log_int(pamh, err, format, args);
302 va_end(args);
305 static void _pam_log_state_datum(struct pwb_context *ctx,
306 int item_type,
307 const char *key,
308 int is_string)
310 const void *data = NULL;
311 if (item_type != 0) {
312 pam_get_item(ctx->pamh, item_type, &data);
313 } else {
314 pam_get_data(ctx->pamh, key, &data);
316 if (data != NULL) {
317 const char *type = (item_type != 0) ? "ITEM" : "DATA";
318 if (is_string != 0) {
319 _pam_log_debug(ctx, LOG_DEBUG,
320 "[pamh: %p] STATE: %s(%s) = \"%s\" (%p)",
321 ctx->pamh, type, key, (const char *)data,
322 data);
323 } else {
324 _pam_log_debug(ctx, LOG_DEBUG,
325 "[pamh: %p] STATE: %s(%s) = %p",
326 ctx->pamh, type, key, data);
331 #define _PAM_LOG_STATE_DATA_POINTER(ctx, module_data_name) \
332 _pam_log_state_datum(ctx, 0, module_data_name, 0)
334 #define _PAM_LOG_STATE_DATA_STRING(ctx, module_data_name) \
335 _pam_log_state_datum(ctx, 0, module_data_name, 1)
337 #define _PAM_LOG_STATE_ITEM_POINTER(ctx, item_type) \
338 _pam_log_state_datum(ctx, item_type, #item_type, 0)
340 #define _PAM_LOG_STATE_ITEM_STRING(ctx, item_type) \
341 _pam_log_state_datum(ctx, item_type, #item_type, 1)
343 #ifdef DEBUG_PASSWORD
344 #define _LOG_PASSWORD_AS_STRING 1
345 #else
346 #define _LOG_PASSWORD_AS_STRING 0
347 #endif
349 #define _PAM_LOG_STATE_ITEM_PASSWORD(ctx, item_type) \
350 _pam_log_state_datum(ctx, item_type, #item_type, \
351 _LOG_PASSWORD_AS_STRING)
353 static void _pam_log_state(struct pwb_context *ctx)
355 if (!_pam_log_is_debug_state_enabled(ctx->ctrl)) {
356 return;
359 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_SERVICE);
360 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER);
361 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_TTY);
362 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RHOST);
363 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RUSER);
364 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_OLDAUTHTOK);
365 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_AUTHTOK);
366 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER_PROMPT);
367 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_CONV);
368 #ifdef PAM_FAIL_DELAY
369 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_FAIL_DELAY);
370 #endif
371 #ifdef PAM_REPOSITORY
372 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_REPOSITORY);
373 #endif
375 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_HOMEDIR);
376 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSCRIPT);
377 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSERVER);
378 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_PROFILEPATH);
379 _PAM_LOG_STATE_DATA_STRING(ctx,
380 PAM_WINBIND_NEW_AUTHTOK_REQD);
381 /* Use atoi to get PAM result code */
382 _PAM_LOG_STATE_DATA_STRING(ctx,
383 PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
384 _PAM_LOG_STATE_DATA_POINTER(ctx, PAM_WINBIND_PWD_LAST_SET);
387 static int _pam_parse(const pam_handle_t *pamh,
388 int flags,
389 int argc,
390 const char **argv,
391 dictionary **result_d)
393 int ctrl = 0;
394 const char *config_file = NULL;
395 int i;
396 const char **v;
397 dictionary *d = NULL;
399 if (flags & PAM_SILENT) {
400 ctrl |= WINBIND_SILENT;
403 for (i=argc,v=argv; i-- > 0; ++v) {
404 if (!strncasecmp(*v, "config", strlen("config"))) {
405 ctrl |= WINBIND_CONFIG_FILE;
406 config_file = v[i];
407 break;
411 if (config_file == NULL) {
412 config_file = PAM_WINBIND_CONFIG_FILE;
415 d = iniparser_load(CONST_DISCARD(char *, config_file));
416 if (d == NULL) {
417 goto config_from_pam;
420 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:debug"), false)) {
421 ctrl |= WINBIND_DEBUG_ARG;
424 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:debug_state"), false)) {
425 ctrl |= WINBIND_DEBUG_STATE;
428 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:cached_login"), false)) {
429 ctrl |= WINBIND_CACHED_LOGIN;
432 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:krb5_auth"), false)) {
433 ctrl |= WINBIND_KRB5_AUTH;
436 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:silent"), false)) {
437 ctrl |= WINBIND_SILENT;
440 if (iniparser_getstr(d, CONST_DISCARD(char *, "global:krb5_ccache_type")) != NULL) {
441 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
444 if ((iniparser_getstr(d, CONST_DISCARD(char *, "global:require-membership-of"))
445 != NULL) ||
446 (iniparser_getstr(d, CONST_DISCARD(char *, "global:require_membership_of"))
447 != NULL)) {
448 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
451 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:try_first_pass"), false)) {
452 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
455 if (iniparser_getint(d, CONST_DISCARD(char *, "global:warn_pwd_expire"), 0)) {
456 ctrl |= WINBIND_WARN_PWD_EXPIRE;
459 if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:mkhomedir"), false)) {
460 ctrl |= WINBIND_MKHOMEDIR;
463 config_from_pam:
464 /* step through arguments */
465 for (i=argc,v=argv; i-- > 0; ++v) {
467 /* generic options */
468 if (!strcmp(*v,"debug"))
469 ctrl |= WINBIND_DEBUG_ARG;
470 else if (!strcasecmp(*v, "debug_state"))
471 ctrl |= WINBIND_DEBUG_STATE;
472 else if (!strcasecmp(*v, "silent"))
473 ctrl |= WINBIND_SILENT;
474 else if (!strcasecmp(*v, "use_authtok"))
475 ctrl |= WINBIND_USE_AUTHTOK_ARG;
476 else if (!strcasecmp(*v, "use_first_pass"))
477 ctrl |= WINBIND_USE_FIRST_PASS_ARG;
478 else if (!strcasecmp(*v, "try_first_pass"))
479 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
480 else if (!strcasecmp(*v, "unknown_ok"))
481 ctrl |= WINBIND_UNKNOWN_OK_ARG;
482 else if (!strncasecmp(*v, "require_membership_of",
483 strlen("require_membership_of")))
484 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
485 else if (!strncasecmp(*v, "require-membership-of",
486 strlen("require-membership-of")))
487 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
488 else if (!strcasecmp(*v, "krb5_auth"))
489 ctrl |= WINBIND_KRB5_AUTH;
490 else if (!strncasecmp(*v, "krb5_ccache_type",
491 strlen("krb5_ccache_type")))
492 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
493 else if (!strcasecmp(*v, "cached_login"))
494 ctrl |= WINBIND_CACHED_LOGIN;
495 else if (!strcasecmp(*v, "mkhomedir"))
496 ctrl |= WINBIND_MKHOMEDIR;
497 else {
498 __pam_log(pamh, ctrl, LOG_ERR,
499 "pam_parse: unknown option: %s", *v);
500 return -1;
505 if (result_d) {
506 *result_d = d;
507 } else {
508 if (d) {
509 iniparser_freedict(d);
513 return ctrl;
516 static int _pam_winbind_free_context(struct pwb_context *ctx)
518 if (!ctx) {
519 return 0;
522 if (ctx->dict) {
523 iniparser_freedict(ctx->dict);
526 return 0;
529 static int _pam_winbind_init_context(pam_handle_t *pamh,
530 int flags,
531 int argc,
532 const char **argv,
533 struct pwb_context **ctx_p)
535 struct pwb_context *r = NULL;
537 #ifdef HAVE_GETTEXT
538 textdomain_init();
539 #endif
541 r = TALLOC_ZERO_P(NULL, struct pwb_context);
542 if (!r) {
543 return PAM_BUF_ERR;
546 talloc_set_destructor(r, _pam_winbind_free_context);
548 r->pamh = pamh;
549 r->flags = flags;
550 r->argc = argc;
551 r->argv = argv;
552 r->ctrl = _pam_parse(pamh, flags, argc, argv, &r->dict);
553 if (r->ctrl == -1) {
554 TALLOC_FREE(r);
555 return PAM_SYSTEM_ERR;
558 *ctx_p = r;
560 return PAM_SUCCESS;
563 static void _pam_winbind_cleanup_func(pam_handle_t *pamh,
564 void *data,
565 int error_status)
567 int ctrl = _pam_parse(pamh, 0, 0, NULL, NULL);
568 if (_pam_log_is_debug_state_enabled(ctrl)) {
569 __pam_log_debug(pamh, ctrl, LOG_DEBUG,
570 "[pamh: %p] CLEAN: cleaning up PAM data %p "
571 "(error_status = %d)", pamh, data,
572 error_status);
574 TALLOC_FREE(data);
578 static const struct ntstatus_errors {
579 const char *ntstatus_string;
580 const char *error_string;
581 } ntstatus_errors[] = {
582 {"NT_STATUS_OK",
583 N_("Success")},
584 {"NT_STATUS_BACKUP_CONTROLLER",
585 N_("No primary Domain Controler available")},
586 {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
587 N_("No domain controllers found")},
588 {"NT_STATUS_NO_LOGON_SERVERS",
589 N_("No logon servers")},
590 {"NT_STATUS_PWD_TOO_SHORT",
591 N_("Password too short")},
592 {"NT_STATUS_PWD_TOO_RECENT",
593 N_("The password of this user is too recent to change")},
594 {"NT_STATUS_PWD_HISTORY_CONFLICT",
595 N_("Password is already in password history")},
596 {"NT_STATUS_PASSWORD_EXPIRED",
597 N_("Your password has expired")},
598 {"NT_STATUS_PASSWORD_MUST_CHANGE",
599 N_("You need to change your password now")},
600 {"NT_STATUS_INVALID_WORKSTATION",
601 N_("You are not allowed to logon from this workstation")},
602 {"NT_STATUS_INVALID_LOGON_HOURS",
603 N_("You are not allowed to logon at this time")},
604 {"NT_STATUS_ACCOUNT_EXPIRED",
605 N_("Your account has expired. "
606 "Please contact your System administrator")}, /* SCNR */
607 {"NT_STATUS_ACCOUNT_DISABLED",
608 N_("Your account is disabled. "
609 "Please contact your System administrator")}, /* SCNR */
610 {"NT_STATUS_ACCOUNT_LOCKED_OUT",
611 N_("Your account has been locked. "
612 "Please contact your System administrator")}, /* SCNR */
613 {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
614 N_("Invalid Trust Account")},
615 {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
616 N_("Invalid Trust Account")},
617 {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
618 N_("Invalid Trust Account")},
619 {"NT_STATUS_ACCESS_DENIED",
620 N_("Access is denied")},
621 {NULL, NULL}
624 static const char *_get_ntstatus_error_string(const char *nt_status_string)
626 int i;
627 for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
628 if (!strcasecmp(ntstatus_errors[i].ntstatus_string,
629 nt_status_string)) {
630 return _(ntstatus_errors[i].error_string);
633 return NULL;
636 /* --- authentication management functions --- */
638 /* Attempt a conversation */
640 static int converse(const pam_handle_t *pamh,
641 int nargs,
642 struct pam_message **message,
643 struct pam_response **response)
645 int retval;
646 struct pam_conv *conv;
648 retval = _pam_get_item(pamh, PAM_CONV, &conv);
649 if (retval == PAM_SUCCESS) {
650 retval = conv->conv(nargs,
651 (const struct pam_message **)message,
652 response, conv->appdata_ptr);
655 return retval; /* propagate error status */
659 static int _make_remark(struct pwb_context *ctx,
660 int type,
661 const char *text)
663 int retval = PAM_SUCCESS;
665 struct pam_message *pmsg[1], msg[1];
666 struct pam_response *resp;
668 if (ctx->flags & WINBIND_SILENT) {
669 return PAM_SUCCESS;
672 pmsg[0] = &msg[0];
673 msg[0].msg = discard_const_p(char, text);
674 msg[0].msg_style = type;
676 resp = NULL;
677 retval = converse(ctx->pamh, 1, pmsg, &resp);
679 if (resp) {
680 _pam_drop_reply(resp, 1);
682 return retval;
685 static int _make_remark_v(struct pwb_context *ctx,
686 int type,
687 const char *format,
688 va_list args)
690 char *var;
691 int ret;
693 ret = vasprintf(&var, format, args);
694 if (ret < 0) {
695 _pam_log(ctx, LOG_ERR, "memory allocation failure");
696 return ret;
699 ret = _make_remark(ctx, type, var);
700 SAFE_FREE(var);
701 return ret;
704 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
705 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...)
707 int ret;
708 va_list args;
710 va_start(args, format);
711 ret = _make_remark_v(ctx, type, format, args);
712 va_end(args);
713 return ret;
716 static int pam_winbind_request_log(struct pwb_context *ctx,
717 int retval,
718 const char *user,
719 const char *fn)
721 switch (retval) {
722 case PAM_AUTH_ERR:
723 /* incorrect password */
724 _pam_log(ctx, LOG_WARNING, "user '%s' denied access "
725 "(incorrect password or invalid membership)", user);
726 return retval;
727 case PAM_ACCT_EXPIRED:
728 /* account expired */
729 _pam_log(ctx, LOG_WARNING, "user '%s' account expired",
730 user);
731 return retval;
732 case PAM_AUTHTOK_EXPIRED:
733 /* password expired */
734 _pam_log(ctx, LOG_WARNING, "user '%s' password expired",
735 user);
736 return retval;
737 case PAM_NEW_AUTHTOK_REQD:
738 /* new password required */
739 _pam_log(ctx, LOG_WARNING, "user '%s' new password "
740 "required", user);
741 return retval;
742 case PAM_USER_UNKNOWN:
743 /* the user does not exist */
744 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
745 user);
746 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
747 return PAM_IGNORE;
749 return retval;
750 case PAM_SUCCESS:
751 /* Otherwise, the authentication looked good */
752 if (strcmp(fn, "wbcLogonUser") == 0) {
753 _pam_log(ctx, LOG_NOTICE,
754 "user '%s' granted access", user);
755 } else {
756 _pam_log(ctx, LOG_NOTICE,
757 "user '%s' OK", user);
759 return retval;
760 default:
761 /* we don't know anything about this return value */
762 _pam_log(ctx, LOG_ERR,
763 "internal module error (retval = %s(%d), user = '%s')",
764 _pam_error_code_str(retval), retval, user);
765 return retval;
769 static int wbc_auth_error_to_pam_error(struct pwb_context *ctx,
770 struct wbcAuthErrorInfo *e,
771 wbcErr status,
772 const char *username,
773 const char *fn)
775 int ret = PAM_AUTH_ERR;
777 if (WBC_ERROR_IS_OK(status)) {
778 _pam_log_debug(ctx, LOG_DEBUG, "request %s succeeded",
779 fn);
780 ret = PAM_SUCCESS;
781 return pam_winbind_request_log(ctx, ret, username, fn);
784 if (e) {
785 if (e->pam_error != PAM_SUCCESS) {
786 _pam_log(ctx, LOG_ERR,
787 "request %s failed: %s, "
788 "PAM error: %s (%d), NTSTATUS: %s, "
789 "Error message was: %s",
791 wbcErrorString(status),
792 _pam_error_code_str(e->pam_error),
793 e->pam_error,
794 e->nt_string,
795 e->display_string);
796 ret = e->pam_error;
797 return pam_winbind_request_log(ctx, ret, username, fn);
800 _pam_log(ctx, LOG_ERR, "request %s failed, but PAM error 0!", fn);
802 ret = PAM_SERVICE_ERR;
803 return pam_winbind_request_log(ctx, ret, username, fn);
806 ret = wbc_error_to_pam_error(status);
807 return pam_winbind_request_log(ctx, ret, username, fn);
810 #if defined(HAVE_PAM_RADIO_TYPE)
811 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
813 struct pam_message msg, *pmsg;
814 struct pam_response *resp = NULL;
815 const char *prompt;
816 int ret;
817 bool retval = false;
818 prompt = _("Do you want to change your password now?");
819 pmsg = &msg;
820 msg.msg_style = PAM_RADIO_TYPE;
821 msg.msg = prompt;
822 ret = converse(ctx->pamh, 1, &pmsg, &resp);
823 if (resp == NULL) {
824 if (ret == PAM_SUCCESS) {
825 _pam_log(ctx, LOG_CRIT, "pam_winbind: system error!\n");
826 return false;
829 if (ret != PAM_SUCCESS) {
830 return false;
832 _pam_log(ctx, LOG_CRIT, "Received [%s] reply from application.\n", resp->resp);
834 if (strcasecmp(resp->resp, "yes") == 0) {
835 retval = true;
838 _pam_drop_reply(resp, 1);
839 return retval;
841 #else
842 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
844 return false;
846 #endif
849 * send a password expiry message if required
851 * @param ctx PAM winbind context.
852 * @param next_change expected (calculated) next expiry date.
853 * @param already_expired pointer to a boolean to indicate if the password is
854 * already expired.
856 * @return boolean Returns true if message has been sent, false if not.
859 static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
860 time_t next_change,
861 time_t now,
862 int warn_pwd_expire,
863 bool *already_expired,
864 bool *change_pwd)
866 int days = 0;
867 struct tm tm_now, tm_next_change;
868 bool retval = false;
869 int ret;
871 if (already_expired) {
872 *already_expired = false;
875 if (change_pwd) {
876 *change_pwd = false;
879 if (next_change <= now) {
880 PAM_WB_REMARK_DIRECT(ctx, "NT_STATUS_PASSWORD_EXPIRED");
881 if (already_expired) {
882 *already_expired = true;
884 return true;
887 if ((next_change < 0) ||
888 (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
889 return false;
892 if ((localtime_r(&now, &tm_now) == NULL) ||
893 (localtime_r(&next_change, &tm_next_change) == NULL)) {
894 return false;
897 days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) -
898 (tm_now.tm_yday+tm_now.tm_year*365);
900 if (days == 0) {
901 ret = _make_remark(ctx, PAM_TEXT_INFO,
902 _("Your password expires today.\n"));
905 * If change_pwd and already_expired is null.
906 * We are just sending a notification message.
907 * We don't expect any response in this case.
910 if (!change_pwd && !already_expired) {
911 return true;
915 * successfully sent the warning message.
916 * Give the user a chance to change pwd.
918 if (ret == PAM_SUCCESS) {
919 if (change_pwd) {
920 retval = _pam_winbind_change_pwd(ctx);
921 if (retval) {
922 *change_pwd = true;
926 return true;
929 if (days > 0 && days < warn_pwd_expire) {
931 ret = _make_remark_format(ctx, PAM_TEXT_INFO,
932 _("Your password will expire in %d %s.\n"),
933 days, (days > 1) ? _("days"):_("day"));
935 * If change_pwd and already_expired is null.
936 * We are just sending a notification message.
937 * We don't expect any response in this case.
940 if (!change_pwd && !already_expired) {
941 return true;
945 * successfully sent the warning message.
946 * Give the user a chance to change pwd.
948 if (ret == PAM_SUCCESS) {
949 if (change_pwd) {
950 retval = _pam_winbind_change_pwd(ctx);
951 if (retval) {
952 *change_pwd = true;
956 return true;
959 return false;
963 * Send a warning if the password expires in the near future
965 * @param ctx PAM winbind context.
966 * @param response The full authentication response structure.
967 * @param already_expired boolean, is the pwd already expired?
969 * @return void.
972 static void _pam_warn_password_expiry(struct pwb_context *ctx,
973 const struct wbcAuthUserInfo *info,
974 const struct wbcUserPasswordPolicyInfo *policy,
975 int warn_pwd_expire,
976 bool *already_expired,
977 bool *change_pwd)
979 time_t now = time(NULL);
980 time_t next_change = 0;
982 if (!info || !policy) {
983 return;
986 if (already_expired) {
987 *already_expired = false;
990 if (change_pwd) {
991 *change_pwd = false;
994 /* accounts with WBC_ACB_PWNOEXP set never receive a warning */
995 if (info->acct_flags & WBC_ACB_PWNOEXP) {
996 return;
999 /* no point in sending a warning if this is a grace logon */
1000 if (PAM_WB_GRACE_LOGON(info->user_flags)) {
1001 return;
1004 /* check if the info3 must change timestamp has been set */
1005 next_change = info->pass_must_change_time;
1007 if (_pam_send_password_expiry_message(ctx, next_change, now,
1008 warn_pwd_expire,
1009 already_expired,
1010 change_pwd)) {
1011 return;
1014 /* now check for the global password policy */
1015 /* good catch from Ralf Haferkamp: an expiry of "never" is translated
1016 * to -1 */
1017 if ((policy->expire == (int64_t)-1) ||
1018 (policy->expire == 0)) {
1019 return;
1022 next_change = info->pass_last_set_time + policy->expire;
1024 if (_pam_send_password_expiry_message(ctx, next_change, now,
1025 warn_pwd_expire,
1026 already_expired,
1027 change_pwd)) {
1028 return;
1031 /* no warning sent */
1034 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
1037 * Append a string, making sure not to overflow and to always return a
1038 * NULL-terminated string.
1040 * @param dest Destination string buffer (must already be NULL-terminated).
1041 * @param src Source string buffer.
1042 * @param dest_buffer_size Size of dest buffer in bytes.
1044 * @return false if dest buffer is not big enough (no bytes copied), true on
1045 * success.
1048 static bool safe_append_string(char *dest,
1049 const char *src,
1050 int dest_buffer_size)
1052 int dest_length = strlen(dest);
1053 int src_length = strlen(src);
1055 if (dest_length + src_length + 1 > dest_buffer_size) {
1056 return false;
1059 memcpy(dest + dest_length, src, src_length + 1);
1060 return true;
1064 * Convert a names into a SID string, appending it to a buffer.
1066 * @param ctx PAM winbind context.
1067 * @param user User in PAM request.
1068 * @param name Name to convert.
1069 * @param sid_list_buffer Where to append the string sid.
1070 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1072 * @return false on failure, true on success.
1074 static bool winbind_name_to_sid_string(struct pwb_context *ctx,
1075 const char *user,
1076 const char *name,
1077 char *sid_list_buffer,
1078 int sid_list_buffer_size)
1080 char sid_string[WBC_SID_STRING_BUFLEN];
1082 /* lookup name? */
1083 if (IS_SID_STRING(name)) {
1084 strlcpy(sid_string, name, sizeof(sid_string));
1085 } else {
1086 wbcErr wbc_status;
1087 struct wbcDomainSid sid;
1088 enum wbcSidType type;
1090 _pam_log_debug(ctx, LOG_DEBUG,
1091 "no sid given, looking up: %s\n", name);
1093 wbc_status = wbcLookupName("", name, &sid, &type);
1094 if (!WBC_ERROR_IS_OK(wbc_status)) {
1095 _pam_log(ctx, LOG_INFO,
1096 "could not lookup name: %s\n", name);
1097 return false;
1100 wbcSidToStringBuf(&sid, sid_string, sizeof(sid_string));
1103 if (!safe_append_string(sid_list_buffer, sid_string,
1104 sid_list_buffer_size)) {
1105 return false;
1107 return true;
1111 * Convert a list of names into a list of sids.
1113 * @param ctx PAM winbind context.
1114 * @param user User in PAM request.
1115 * @param name_list List of names or string sids, separated by commas.
1116 * @param sid_list_buffer Where to put the list of string sids.
1117 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1119 * @return false on failure, true on success.
1121 static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
1122 const char *user,
1123 const char *name_list,
1124 char *sid_list_buffer,
1125 int sid_list_buffer_size)
1127 bool result = false;
1128 char *current_name = NULL;
1129 const char *search_location;
1130 const char *comma;
1131 int len;
1133 if (sid_list_buffer_size > 0) {
1134 sid_list_buffer[0] = 0;
1137 search_location = name_list;
1138 while ((comma = strchr(search_location, ',')) != NULL) {
1139 current_name = strndup(search_location,
1140 comma - search_location);
1141 if (NULL == current_name) {
1142 goto out;
1145 if (!winbind_name_to_sid_string(ctx, user,
1146 current_name,
1147 sid_list_buffer,
1148 sid_list_buffer_size)) {
1150 * If one group name failed, we must not fail
1151 * the authentication totally, continue with
1152 * the following group names. If user belongs to
1153 * one of the valid groups, we must allow it
1154 * login. -- BoYang
1157 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1158 "check if group %s is valid group.", current_name,
1159 current_name);
1160 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1161 "to sid, please contact your administrator to see "
1162 "if group %s is valid."), current_name, current_name);
1163 SAFE_FREE(current_name);
1164 search_location = comma + 1;
1165 continue;
1168 SAFE_FREE(current_name);
1170 if (!safe_append_string(sid_list_buffer, ",",
1171 sid_list_buffer_size)) {
1172 goto out;
1175 search_location = comma + 1;
1178 if (!winbind_name_to_sid_string(ctx, user, search_location,
1179 sid_list_buffer,
1180 sid_list_buffer_size)) {
1181 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1182 "check if group %s is valid group.", search_location,
1183 search_location);
1184 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1185 "to sid, please contact your administrator to see "
1186 "if group %s is valid."), search_location, search_location);
1188 * The lookup of the last name failed..
1189 * It results in require_member_of_sid ends with ','
1190 * It is malformated parameter here, overwrite the last ','.
1192 len = strlen(sid_list_buffer);
1193 if ((len != 0) && (sid_list_buffer[len - 1] == ',')) {
1194 sid_list_buffer[len - 1] = '\0';
1198 result = true;
1200 out:
1201 SAFE_FREE(current_name);
1202 return result;
1206 * put krb5ccname variable into environment
1208 * @param ctx PAM winbind context.
1209 * @param krb5ccname env variable retrieved from winbindd.
1211 * @return void.
1214 static void _pam_setup_krb5_env(struct pwb_context *ctx,
1215 struct wbcLogonUserInfo *info)
1217 char var[PATH_MAX];
1218 int ret;
1219 uint32_t i;
1220 const char *krb5ccname = NULL;
1222 if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
1223 return;
1226 if (!info) {
1227 return;
1230 for (i=0; i < info->num_blobs; i++) {
1231 if (strcasecmp(info->blobs[i].name, "krb5ccname") == 0) {
1232 krb5ccname = (const char *)info->blobs[i].blob.data;
1233 break;
1237 if (!krb5ccname || (strlen(krb5ccname) == 0)) {
1238 return;
1241 _pam_log_debug(ctx, LOG_DEBUG,
1242 "request returned KRB5CCNAME: %s", krb5ccname);
1244 if (snprintf(var, sizeof(var), "KRB5CCNAME=%s", krb5ccname) == -1) {
1245 return;
1248 ret = pam_putenv(ctx->pamh, var);
1249 if (ret) {
1250 _pam_log(ctx, LOG_ERR,
1251 "failed to set KRB5CCNAME to %s: %s",
1252 var, pam_strerror(ctx->pamh, ret));
1257 * Copy unix username if available (further processed in PAM).
1259 * @param ctx PAM winbind context
1260 * @param user_ret A pointer that holds a pointer to a string
1261 * @param unix_username A username
1263 * @return void.
1266 static void _pam_setup_unix_username(struct pwb_context *ctx,
1267 char **user_ret,
1268 struct wbcLogonUserInfo *info)
1270 const char *unix_username = NULL;
1271 uint32_t i;
1273 if (!user_ret || !info) {
1274 return;
1277 for (i=0; i < info->num_blobs; i++) {
1278 if (strcasecmp(info->blobs[i].name, "unix_username") == 0) {
1279 unix_username = (const char *)info->blobs[i].blob.data;
1280 break;
1284 if (!unix_username || !unix_username[0]) {
1285 return;
1288 *user_ret = strdup(unix_username);
1292 * Set string into the PAM stack.
1294 * @param ctx PAM winbind context.
1295 * @param data_name Key name for pam_set_data.
1296 * @param value String value.
1298 * @return void.
1301 static void _pam_set_data_string(struct pwb_context *ctx,
1302 const char *data_name,
1303 const char *value)
1305 int ret;
1307 if (!data_name || !value || (strlen(data_name) == 0) ||
1308 (strlen(value) == 0)) {
1309 return;
1312 ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
1313 _pam_winbind_cleanup_func);
1314 if (ret) {
1315 _pam_log_debug(ctx, LOG_DEBUG,
1316 "Could not set data %s: %s\n",
1317 data_name, pam_strerror(ctx->pamh, ret));
1322 * Set info3 strings into the PAM stack.
1324 * @param ctx PAM winbind context.
1325 * @param data_name Key name for pam_set_data.
1326 * @param value String value.
1328 * @return void.
1331 static void _pam_set_data_info3(struct pwb_context *ctx,
1332 const struct wbcAuthUserInfo *info)
1334 _pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
1335 info->home_directory);
1336 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
1337 info->logon_script);
1338 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
1339 info->logon_server);
1340 _pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
1341 info->profile_path);
1345 * Free info3 strings in the PAM stack.
1347 * @param pamh PAM handle
1349 * @return void.
1352 static void _pam_free_data_info3(pam_handle_t *pamh)
1354 pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1355 pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1356 pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1357 pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1361 * Send PAM_ERROR_MSG for cached or grace logons.
1363 * @param ctx PAM winbind context.
1364 * @param username User in PAM request.
1365 * @param info3_user_flgs Info3 flags containing logon type bits.
1367 * @return void.
1370 static void _pam_warn_logon_type(struct pwb_context *ctx,
1371 const char *username,
1372 uint32_t info3_user_flgs)
1374 /* inform about logon type */
1375 if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1377 _make_remark(ctx, PAM_ERROR_MSG,
1378 _("Grace login. "
1379 "Please change your password as soon you're "
1380 "online again"));
1381 _pam_log_debug(ctx, LOG_DEBUG,
1382 "User %s logged on using grace logon\n",
1383 username);
1385 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1387 _make_remark(ctx, PAM_ERROR_MSG,
1388 _("Domain Controller unreachable, "
1389 "using cached credentials instead. "
1390 "Network resources may be unavailable"));
1391 _pam_log_debug(ctx, LOG_DEBUG,
1392 "User %s logged on using cached credentials\n",
1393 username);
1398 * Send PAM_ERROR_MSG for krb5 errors.
1400 * @param ctx PAM winbind context.
1401 * @param username User in PAM request.
1402 * @param info3_user_flgs Info3 flags containing logon type bits.
1404 * @return void.
1407 static void _pam_warn_krb5_failure(struct pwb_context *ctx,
1408 const char *username,
1409 uint32_t info3_user_flgs)
1411 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1412 _make_remark(ctx, PAM_ERROR_MSG,
1413 _("Failed to establish your Kerberos Ticket cache "
1414 "due time differences\n"
1415 "with the domain controller. "
1416 "Please verify the system time.\n"));
1417 _pam_log_debug(ctx, LOG_DEBUG,
1418 "User %s: Clock skew when getting Krb5 TGT\n",
1419 username);
1423 static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
1424 const struct wbcAuthErrorInfo *e,
1425 const char *nt_status_string,
1426 int *pam_err)
1428 const char *ntstatus = NULL;
1429 const char *error_string = NULL;
1431 if (!e || !pam_err) {
1432 return false;
1435 ntstatus = e->nt_string;
1436 if (!ntstatus) {
1437 return false;
1440 if (strcasecmp(ntstatus, nt_status_string) == 0) {
1442 error_string = _get_ntstatus_error_string(nt_status_string);
1443 if (error_string) {
1444 _make_remark(ctx, PAM_ERROR_MSG, error_string);
1445 *pam_err = e->pam_error;
1446 return true;
1449 if (e->display_string) {
1450 _make_remark(ctx, PAM_ERROR_MSG, _(e->display_string));
1451 *pam_err = e->pam_error;
1452 return true;
1455 _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
1456 *pam_err = e->pam_error;
1458 return true;
1461 return false;
1465 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1467 * @param i The wbcUserPasswordPolicyInfo struct.
1469 * @return string (caller needs to talloc_free).
1472 static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
1473 struct wbcUserPasswordPolicyInfo *i)
1475 char *str = NULL;
1477 if (!i) {
1478 goto failed;
1481 str = talloc_asprintf(ctx, _("Your password "));
1482 if (!str) {
1483 goto failed;
1486 if (i->min_length_password > 0) {
1487 str = talloc_asprintf_append(str,
1488 _("must be at least %d characters; "),
1489 i->min_length_password);
1490 if (!str) {
1491 goto failed;
1495 if (i->password_history > 0) {
1496 str = talloc_asprintf_append(str,
1497 _("cannot repeat any of your previous %d "
1498 "passwords; "),
1499 i->password_history);
1500 if (!str) {
1501 goto failed;
1505 if (i->password_properties & WBC_DOMAIN_PASSWORD_COMPLEX) {
1506 str = talloc_asprintf_append(str,
1507 _("must contain capitals, numerals "
1508 "or punctuation; "
1509 "and cannot contain your account "
1510 "or full name; "));
1511 if (!str) {
1512 goto failed;
1516 str = talloc_asprintf_append(str,
1517 _("Please type a different password. "
1518 "Type a password which meets these requirements in "
1519 "both text boxes."));
1520 if (!str) {
1521 goto failed;
1524 return str;
1526 failed:
1527 TALLOC_FREE(str);
1528 return NULL;
1531 static int _pam_create_homedir(struct pwb_context *ctx,
1532 const char *dirname,
1533 mode_t mode)
1535 struct stat sbuf;
1537 if (stat(dirname, &sbuf) == 0) {
1538 return PAM_SUCCESS;
1541 if (mkdir(dirname, mode) != 0) {
1543 _make_remark_format(ctx, PAM_TEXT_INFO,
1544 _("Creating directory: %s failed: %s"),
1545 dirname, strerror(errno));
1546 _pam_log(ctx, LOG_ERR, "could not create dir: %s (%s)",
1547 dirname, strerror(errno));
1548 return PAM_PERM_DENIED;
1551 return PAM_SUCCESS;
1554 static int _pam_chown_homedir(struct pwb_context *ctx,
1555 const char *dirname,
1556 uid_t uid,
1557 gid_t gid)
1559 if (chown(dirname, uid, gid) != 0) {
1560 _pam_log(ctx, LOG_ERR, "failed to chown user homedir: %s (%s)",
1561 dirname, strerror(errno));
1562 return PAM_PERM_DENIED;
1565 return PAM_SUCCESS;
1568 static int _pam_mkhomedir(struct pwb_context *ctx)
1570 struct passwd *pwd = NULL;
1571 char *token = NULL;
1572 char *create_dir = NULL;
1573 char *user_dir = NULL;
1574 int ret;
1575 const char *username;
1576 mode_t mode = 0700;
1577 char *safe_ptr = NULL;
1578 char *p = NULL;
1580 /* Get the username */
1581 ret = pam_get_user(ctx->pamh, &username, NULL);
1582 if ((ret != PAM_SUCCESS) || (!username)) {
1583 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1584 return PAM_SERVICE_ERR;
1587 pwd = getpwnam(username);
1588 if (pwd == NULL) {
1589 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1590 return PAM_USER_UNKNOWN;
1592 _pam_log_debug(ctx, LOG_DEBUG, "homedir is: %s", pwd->pw_dir);
1594 ret = _pam_create_homedir(ctx, pwd->pw_dir, 0700);
1595 if (ret == PAM_SUCCESS) {
1596 ret = _pam_chown_homedir(ctx, pwd->pw_dir,
1597 pwd->pw_uid,
1598 pwd->pw_gid);
1601 if (ret == PAM_SUCCESS) {
1602 return ret;
1605 /* maybe we need to create parent dirs */
1606 create_dir = talloc_strdup(ctx, "/");
1607 if (!create_dir) {
1608 return PAM_BUF_ERR;
1611 /* find final directory */
1612 user_dir = strrchr(pwd->pw_dir, '/');
1613 if (!user_dir) {
1614 return PAM_BUF_ERR;
1616 user_dir++;
1618 _pam_log(ctx, LOG_DEBUG, "final directory: %s", user_dir);
1620 p = pwd->pw_dir;
1622 while ((token = strtok_r(p, "/", &safe_ptr)) != NULL) {
1624 mode = 0755;
1626 p = NULL;
1628 _pam_log_debug(ctx, LOG_DEBUG, "token is %s", token);
1630 create_dir = talloc_asprintf_append(create_dir, "%s/", token);
1631 if (!create_dir) {
1632 return PAM_BUF_ERR;
1634 _pam_log_debug(ctx, LOG_DEBUG, "current_dir is %s", create_dir);
1636 if (strcmp(token, user_dir) == 0) {
1637 _pam_log_debug(ctx, LOG_DEBUG, "assuming last directory: %s", token);
1638 mode = 0700;
1641 ret = _pam_create_homedir(ctx, create_dir, mode);
1642 if (ret) {
1643 return ret;
1647 return _pam_chown_homedir(ctx, create_dir,
1648 pwd->pw_uid,
1649 pwd->pw_gid);
1652 /* talk to winbindd */
1653 static int winbind_auth_request(struct pwb_context *ctx,
1654 const char *user,
1655 const char *pass,
1656 const char *member,
1657 const char *cctype,
1658 const int warn_pwd_expire,
1659 struct wbcAuthErrorInfo **p_error,
1660 struct wbcLogonUserInfo **p_info,
1661 struct wbcUserPasswordPolicyInfo **p_policy,
1662 time_t *pwd_last_set,
1663 char **user_ret)
1665 wbcErr wbc_status;
1667 struct wbcLogonUserParams logon;
1668 char membership_of[1024];
1669 uid_t user_uid = -1;
1670 uint32_t flags = WBFLAG_PAM_INFO3_TEXT |
1671 WBFLAG_PAM_GET_PWD_POLICY;
1673 struct wbcLogonUserInfo *info = NULL;
1674 struct wbcAuthUserInfo *user_info = NULL;
1675 struct wbcAuthErrorInfo *error = NULL;
1676 struct wbcUserPasswordPolicyInfo *policy = NULL;
1678 int ret = PAM_AUTH_ERR;
1679 int i;
1680 const char *codes[] = {
1681 "NT_STATUS_PASSWORD_EXPIRED",
1682 "NT_STATUS_PASSWORD_MUST_CHANGE",
1683 "NT_STATUS_INVALID_WORKSTATION",
1684 "NT_STATUS_INVALID_LOGON_HOURS",
1685 "NT_STATUS_ACCOUNT_EXPIRED",
1686 "NT_STATUS_ACCOUNT_DISABLED",
1687 "NT_STATUS_ACCOUNT_LOCKED_OUT",
1688 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1689 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1690 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1691 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1692 "NT_STATUS_NO_LOGON_SERVERS",
1693 "NT_STATUS_WRONG_PASSWORD",
1694 "NT_STATUS_ACCESS_DENIED"
1697 if (pwd_last_set) {
1698 *pwd_last_set = 0;
1701 /* Krb5 auth always has to go against the KDC of the user's realm */
1703 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1704 flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
1707 if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1708 struct passwd *pwd = NULL;
1710 pwd = getpwnam(user);
1711 if (pwd == NULL) {
1712 return PAM_USER_UNKNOWN;
1714 user_uid = pwd->pw_uid;
1717 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1719 _pam_log_debug(ctx, LOG_DEBUG,
1720 "enabling krb5 login flag\n");
1722 flags |= WBFLAG_PAM_KRB5 |
1723 WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1726 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1727 _pam_log_debug(ctx, LOG_DEBUG,
1728 "enabling cached login flag\n");
1729 flags |= WBFLAG_PAM_CACHED_LOGIN;
1732 if (user_ret) {
1733 *user_ret = NULL;
1734 flags |= WBFLAG_PAM_UNIX_NAME;
1737 if (cctype != NULL) {
1738 _pam_log_debug(ctx, LOG_DEBUG,
1739 "enabling request for a %s krb5 ccache\n",
1740 cctype);
1743 if (member != NULL) {
1745 ZERO_STRUCT(membership_of);
1747 if (!winbind_name_list_to_sid_string_list(ctx, user, member,
1748 membership_of,
1749 sizeof(membership_of))) {
1750 _pam_log_debug(ctx, LOG_ERR,
1751 "failed to serialize membership of sid "
1752 "\"%s\"\n", member);
1753 return PAM_AUTH_ERR;
1757 ZERO_STRUCT(logon);
1759 logon.username = user;
1760 logon.password = pass;
1762 if (cctype) {
1763 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1764 &logon.blobs,
1765 "krb5_cc_type",
1767 (uint8_t *)cctype,
1768 strlen(cctype)+1);
1769 if (!WBC_ERROR_IS_OK(wbc_status)) {
1770 goto done;
1774 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1775 &logon.blobs,
1776 "flags",
1778 (uint8_t *)&flags,
1779 sizeof(flags));
1780 if (!WBC_ERROR_IS_OK(wbc_status)) {
1781 goto done;
1784 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1785 &logon.blobs,
1786 "user_uid",
1788 (uint8_t *)&user_uid,
1789 sizeof(user_uid));
1790 if (!WBC_ERROR_IS_OK(wbc_status)) {
1791 goto done;
1794 if (member) {
1795 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1796 &logon.blobs,
1797 "membership_of",
1799 (uint8_t *)membership_of,
1800 sizeof(membership_of));
1801 if (!WBC_ERROR_IS_OK(wbc_status)) {
1802 goto done;
1806 wbc_status = wbcLogonUser(&logon, &info, &error, &policy);
1807 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1808 user, "wbcLogonUser");
1809 wbcFreeMemory(logon.blobs);
1810 logon.blobs = NULL;
1812 if (info && info->info) {
1813 user_info = info->info;
1816 if (pwd_last_set && user_info) {
1817 *pwd_last_set = user_info->pass_last_set_time;
1820 if (p_info && info) {
1821 *p_info = info;
1824 if (p_policy && policy) {
1825 *p_policy = policy;
1828 if (p_error && error) {
1829 /* We want to process the error in the caller. */
1830 *p_error = error;
1831 return ret;
1834 for (i=0; i<ARRAY_SIZE(codes); i++) {
1835 int _ret = ret;
1836 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1837 ret = _ret;
1838 goto done;
1842 if ((ret == PAM_SUCCESS) && user_info && policy && info) {
1844 bool already_expired = false;
1845 bool change_pwd = false;
1847 /* warn a user if the password is about to expire soon */
1848 _pam_warn_password_expiry(ctx, user_info, policy,
1849 warn_pwd_expire,
1850 &already_expired,
1851 &change_pwd);
1853 if (already_expired == true) {
1855 SMB_TIME_T last_set = user_info->pass_last_set_time;
1857 _pam_log_debug(ctx, LOG_DEBUG,
1858 "Password has expired "
1859 "(Password was last set: %lld, "
1860 "the policy says it should expire here "
1861 "%lld (now it's: %ld))\n",
1862 (long long int)last_set,
1863 (long long int)last_set +
1864 policy->expire,
1865 (long)time(NULL));
1867 return PAM_AUTHTOK_EXPIRED;
1870 if (change_pwd) {
1871 ret = PAM_NEW_AUTHTOK_REQD;
1872 goto done;
1875 /* inform about logon type */
1876 _pam_warn_logon_type(ctx, user, user_info->user_flags);
1878 /* inform about krb5 failures */
1879 _pam_warn_krb5_failure(ctx, user, user_info->user_flags);
1881 /* set some info3 info for other modules in the stack */
1882 _pam_set_data_info3(ctx, user_info);
1884 /* put krb5ccname into env */
1885 _pam_setup_krb5_env(ctx, info);
1887 /* If winbindd returned a username, return the pointer to it
1888 * here. */
1889 _pam_setup_unix_username(ctx, user_ret, info);
1892 done:
1893 wbcFreeMemory(logon.blobs);
1894 if (info && info->blobs && !p_info) {
1895 wbcFreeMemory(info->blobs);
1897 if (error && !p_error) {
1898 wbcFreeMemory(error);
1900 if (info && !p_info) {
1901 wbcFreeMemory(info);
1903 if (policy && !p_policy) {
1904 wbcFreeMemory(policy);
1907 return ret;
1910 /* talk to winbindd */
1911 static int winbind_chauthtok_request(struct pwb_context *ctx,
1912 const char *user,
1913 const char *oldpass,
1914 const char *newpass,
1915 time_t pwd_last_set)
1917 wbcErr wbc_status;
1918 struct wbcChangePasswordParams params;
1919 struct wbcAuthErrorInfo *error = NULL;
1920 struct wbcUserPasswordPolicyInfo *policy = NULL;
1921 enum wbcPasswordChangeRejectReason reject_reason = -1;
1922 uint32_t flags = 0;
1924 int i;
1925 const char *codes[] = {
1926 "NT_STATUS_BACKUP_CONTROLLER",
1927 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1928 "NT_STATUS_NO_LOGON_SERVERS",
1929 "NT_STATUS_ACCESS_DENIED",
1930 "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1931 "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1932 "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1934 int ret = PAM_AUTH_ERR;
1936 ZERO_STRUCT(params);
1938 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1939 flags |= WBFLAG_PAM_KRB5 |
1940 WBFLAG_PAM_CONTACT_TRUSTDOM;
1943 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1944 flags |= WBFLAG_PAM_CACHED_LOGIN;
1947 params.account_name = user;
1948 params.level = WBC_AUTH_USER_LEVEL_PLAIN;
1949 params.old_password.plaintext = oldpass;
1950 params.new_password.plaintext = newpass;
1951 params.flags = flags;
1953 wbc_status = wbcChangeUserPasswordEx(&params, &error, &reject_reason, &policy);
1954 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1955 user, "wbcChangeUserPasswordEx");
1957 if (WBC_ERROR_IS_OK(wbc_status)) {
1958 _pam_log(ctx, LOG_NOTICE,
1959 "user '%s' password changed", user);
1960 return PAM_SUCCESS;
1963 if (!error) {
1964 wbcFreeMemory(policy);
1965 return ret;
1968 for (i=0; i<ARRAY_SIZE(codes); i++) {
1969 int _ret = ret;
1970 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1971 ret = _ret;
1972 goto done;
1976 if (!strcasecmp(error->nt_string,
1977 "NT_STATUS_PASSWORD_RESTRICTION")) {
1979 char *pwd_restriction_string = NULL;
1980 SMB_TIME_T min_pwd_age = 0;
1982 if (policy) {
1983 min_pwd_age = policy->min_passwordage;
1986 /* FIXME: avoid to send multiple PAM messages after another */
1987 switch (reject_reason) {
1988 case -1:
1989 break;
1990 case WBC_PWD_CHANGE_NO_ERROR:
1991 if ((min_pwd_age > 0) &&
1992 (pwd_last_set + min_pwd_age > time(NULL))) {
1993 PAM_WB_REMARK_DIRECT(ctx,
1994 "NT_STATUS_PWD_TOO_RECENT");
1996 break;
1997 case WBC_PWD_CHANGE_PASSWORD_TOO_SHORT:
1998 PAM_WB_REMARK_DIRECT(ctx,
1999 "NT_STATUS_PWD_TOO_SHORT");
2000 break;
2001 case WBC_PWD_CHANGE_PWD_IN_HISTORY:
2002 PAM_WB_REMARK_DIRECT(ctx,
2003 "NT_STATUS_PWD_HISTORY_CONFLICT");
2004 break;
2005 case WBC_PWD_CHANGE_NOT_COMPLEX:
2006 _make_remark(ctx, PAM_ERROR_MSG,
2007 _("Password does not meet "
2008 "complexity requirements"));
2009 break;
2010 default:
2011 _pam_log_debug(ctx, LOG_DEBUG,
2012 "unknown password change "
2013 "reject reason: %d",
2014 reject_reason);
2015 break;
2018 pwd_restriction_string =
2019 _pam_compose_pwd_restriction_string(ctx, policy);
2020 if (pwd_restriction_string) {
2021 _make_remark(ctx, PAM_ERROR_MSG,
2022 pwd_restriction_string);
2023 TALLOC_FREE(pwd_restriction_string);
2026 done:
2027 wbcFreeMemory(error);
2028 wbcFreeMemory(policy);
2030 return ret;
2034 * Checks if a user has an account
2036 * return values:
2037 * 1 = User not found
2038 * 0 = OK
2039 * -1 = System error
2041 static int valid_user(struct pwb_context *ctx,
2042 const char *user)
2044 /* check not only if the user is available over NSS calls, also make
2045 * sure it's really a winbind user, this is important when stacking PAM
2046 * modules in the 'account' or 'password' facility. */
2048 wbcErr wbc_status;
2049 struct passwd *pwd = NULL;
2050 struct passwd *wb_pwd = NULL;
2052 pwd = getpwnam(user);
2053 if (pwd == NULL) {
2054 return 1;
2057 wbc_status = wbcGetpwnam(user, &wb_pwd);
2058 wbcFreeMemory(wb_pwd);
2059 if (!WBC_ERROR_IS_OK(wbc_status)) {
2060 _pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
2061 wbcErrorString(wbc_status));
2064 switch (wbc_status) {
2065 case WBC_ERR_UNKNOWN_USER:
2066 return 1;
2067 case WBC_ERR_SUCCESS:
2068 return 0;
2069 default:
2070 break;
2072 return -1;
2075 static char *_pam_delete(register char *xx)
2077 _pam_overwrite(xx);
2078 _pam_drop(xx);
2079 return NULL;
2083 * obtain a password from the user
2086 static int _winbind_read_password(struct pwb_context *ctx,
2087 unsigned int ctrl,
2088 const char *comment,
2089 const char *prompt1,
2090 const char *prompt2,
2091 const char **pass)
2093 int authtok_flag;
2094 int retval;
2095 const char *item;
2096 char *token;
2098 _pam_log(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
2101 * make sure nothing inappropriate gets returned
2104 *pass = token = NULL;
2107 * which authentication token are we getting?
2110 if (on(WINBIND__OLD_PASSWORD, ctrl)) {
2111 authtok_flag = PAM_OLDAUTHTOK;
2112 } else {
2113 authtok_flag = PAM_AUTHTOK;
2117 * should we obtain the password from a PAM item ?
2120 if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
2121 on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2122 retval = _pam_get_item(ctx->pamh, authtok_flag, &item);
2123 if (retval != PAM_SUCCESS) {
2124 /* very strange. */
2125 _pam_log(ctx, LOG_ALERT,
2126 "pam_get_item returned error "
2127 "to unix-read-password");
2128 return retval;
2129 } else if (item != NULL) { /* we have a password! */
2130 *pass = item;
2131 item = NULL;
2132 _pam_log(ctx, LOG_DEBUG,
2133 "pam_get_item returned a password");
2134 return PAM_SUCCESS;
2135 } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2136 return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
2137 } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
2138 && off(WINBIND__OLD_PASSWORD, ctrl)) {
2139 return PAM_AUTHTOK_RECOVER_ERR;
2143 * getting here implies we will have to get the password from the
2144 * user directly.
2148 struct pam_message msg[3], *pmsg[3];
2149 struct pam_response *resp;
2150 int i, replies;
2152 /* prepare to converse */
2154 if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
2155 pmsg[0] = &msg[0];
2156 msg[0].msg_style = PAM_TEXT_INFO;
2157 msg[0].msg = discard_const_p(char, comment);
2158 i = 1;
2159 } else {
2160 i = 0;
2163 pmsg[i] = &msg[i];
2164 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2165 msg[i++].msg = discard_const_p(char, prompt1);
2166 replies = 1;
2168 if (prompt2 != NULL) {
2169 pmsg[i] = &msg[i];
2170 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2171 msg[i++].msg = discard_const_p(char, prompt2);
2172 ++replies;
2174 /* so call the conversation expecting i responses */
2175 resp = NULL;
2176 retval = converse(ctx->pamh, i, pmsg, &resp);
2177 if (resp == NULL) {
2178 if (retval == PAM_SUCCESS) {
2179 retval = PAM_AUTHTOK_RECOVER_ERR;
2181 goto done;
2183 if (retval != PAM_SUCCESS) {
2184 _pam_drop_reply(resp, i);
2185 goto done;
2188 /* interpret the response */
2190 token = x_strdup(resp[i - replies].resp);
2191 if (!token) {
2192 _pam_log(ctx, LOG_NOTICE,
2193 "could not recover "
2194 "authentication token");
2195 retval = PAM_AUTHTOK_RECOVER_ERR;
2196 goto done;
2199 if (replies == 2) {
2200 /* verify that password entered correctly */
2201 if (!resp[i - 1].resp ||
2202 strcmp(token, resp[i - 1].resp)) {
2203 _pam_delete(token); /* mistyped */
2204 retval = PAM_AUTHTOK_RECOVER_ERR;
2205 _make_remark(ctx, PAM_ERROR_MSG,
2206 MISTYPED_PASS);
2211 * tidy up the conversation (resp_retcode) is ignored
2212 * -- what is it for anyway? AGM
2214 _pam_drop_reply(resp, i);
2217 done:
2218 if (retval != PAM_SUCCESS) {
2219 _pam_log_debug(ctx, LOG_DEBUG,
2220 "unable to obtain a password");
2221 return retval;
2223 /* 'token' is the entered password */
2225 /* we store this password as an item */
2227 retval = pam_set_item(ctx->pamh, authtok_flag, token);
2228 _pam_delete(token); /* clean it up */
2229 if (retval != PAM_SUCCESS ||
2230 (retval = _pam_get_item(ctx->pamh, authtok_flag, &item)) != PAM_SUCCESS) {
2232 _pam_log(ctx, LOG_CRIT, "error manipulating password");
2233 return retval;
2237 *pass = item;
2238 item = NULL; /* break link to password */
2240 return PAM_SUCCESS;
2243 static const char *get_conf_item_string(struct pwb_context *ctx,
2244 const char *item,
2245 int config_flag)
2247 int i = 0;
2248 const char *parm_opt = NULL;
2250 if (!(ctx->ctrl & config_flag)) {
2251 goto out;
2254 /* let the pam opt take precedence over the pam_winbind.conf option */
2255 for (i=0; i<ctx->argc; i++) {
2257 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2258 char *p;
2260 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2261 _pam_log(ctx, LOG_INFO,
2262 "no \"=\" delimiter for \"%s\" found\n",
2263 item);
2264 goto out;
2266 _pam_log_debug(ctx, LOG_INFO,
2267 "PAM config: %s '%s'\n", item, p+1);
2268 return p + 1;
2272 if (ctx->dict) {
2273 char *key = NULL;
2275 key = talloc_asprintf(ctx, "global:%s", item);
2276 if (!key) {
2277 goto out;
2280 parm_opt = iniparser_getstr(ctx->dict, key);
2281 TALLOC_FREE(key);
2283 _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
2284 item, parm_opt);
2286 out:
2287 return parm_opt;
2290 static int get_config_item_int(struct pwb_context *ctx,
2291 const char *item,
2292 int config_flag)
2294 int i, parm_opt = -1;
2296 if (!(ctx->ctrl & config_flag)) {
2297 goto out;
2300 /* let the pam opt take precedence over the pam_winbind.conf option */
2301 for (i = 0; i < ctx->argc; i++) {
2303 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2304 char *p;
2306 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2307 _pam_log(ctx, LOG_INFO,
2308 "no \"=\" delimiter for \"%s\" found\n",
2309 item);
2310 goto out;
2312 parm_opt = atoi(p + 1);
2313 _pam_log_debug(ctx, LOG_INFO,
2314 "PAM config: %s '%d'\n",
2315 item, parm_opt);
2316 return parm_opt;
2320 if (ctx->dict) {
2321 char *key = NULL;
2323 key = talloc_asprintf(ctx, "global:%s", item);
2324 if (!key) {
2325 goto out;
2328 parm_opt = iniparser_getint(ctx->dict, key, -1);
2329 TALLOC_FREE(key);
2331 _pam_log_debug(ctx, LOG_INFO,
2332 "CONFIG file: %s '%d'\n",
2333 item, parm_opt);
2335 out:
2336 return parm_opt;
2339 static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
2341 return get_conf_item_string(ctx, "krb5_ccache_type",
2342 WINBIND_KRB5_CCACHE_TYPE);
2345 static const char *get_member_from_config(struct pwb_context *ctx)
2347 const char *ret = NULL;
2348 ret = get_conf_item_string(ctx, "require_membership_of",
2349 WINBIND_REQUIRED_MEMBERSHIP);
2350 if (ret) {
2351 return ret;
2353 return get_conf_item_string(ctx, "require-membership-of",
2354 WINBIND_REQUIRED_MEMBERSHIP);
2357 static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
2359 int ret;
2360 ret = get_config_item_int(ctx, "warn_pwd_expire",
2361 WINBIND_WARN_PWD_EXPIRE);
2362 /* no or broken setting */
2363 if (ret <= 0) {
2364 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
2366 return ret;
2370 * Retrieve the winbind separator.
2372 * @param ctx PAM winbind context.
2374 * @return string separator character. NULL on failure.
2377 static char winbind_get_separator(struct pwb_context *ctx)
2379 wbcErr wbc_status;
2380 static struct wbcInterfaceDetails *details = NULL;
2382 wbc_status = wbcInterfaceDetails(&details);
2383 if (!WBC_ERROR_IS_OK(wbc_status)) {
2384 _pam_log(ctx, LOG_ERR,
2385 "Could not retrieve winbind interface details: %s",
2386 wbcErrorString(wbc_status));
2387 return '\0';
2390 if (!details) {
2391 return '\0';
2394 return details->winbind_separator;
2399 * Convert a upn to a name.
2401 * @param ctx PAM winbind context.
2402 * @param upn USer UPN to be trabslated.
2404 * @return converted name. NULL pointer on failure. Caller needs to free.
2407 static char* winbind_upn_to_username(struct pwb_context *ctx,
2408 const char *upn)
2410 char sep;
2411 wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
2412 struct wbcDomainSid sid;
2413 enum wbcSidType type;
2414 char *domain = NULL;
2415 char *name;
2416 char *p;
2418 /* This cannot work when the winbind separator = @ */
2420 sep = winbind_get_separator(ctx);
2421 if (!sep || sep == '@') {
2422 return NULL;
2425 name = talloc_strdup(ctx, upn);
2426 if (!name) {
2427 return NULL;
2429 if ((p = strchr(name, '@')) != NULL) {
2430 *p = 0;
2431 domain = p + 1;
2434 /* Convert the UPN to a SID */
2436 wbc_status = wbcLookupName(domain, name, &sid, &type);
2437 if (!WBC_ERROR_IS_OK(wbc_status)) {
2438 return NULL;
2441 /* Convert the the SID back to the sAMAccountName */
2443 wbc_status = wbcLookupSid(&sid, &domain, &name, &type);
2444 if (!WBC_ERROR_IS_OK(wbc_status)) {
2445 return NULL;
2448 return talloc_asprintf(ctx, "%s\\%s", domain, name);
2451 static int _pam_delete_cred(pam_handle_t *pamh, int flags,
2452 int argc, const char **argv)
2454 int retval = PAM_SUCCESS;
2455 struct pwb_context *ctx = NULL;
2456 struct wbcLogoffUserParams logoff;
2457 struct wbcAuthErrorInfo *error = NULL;
2458 const char *user;
2459 wbcErr wbc_status = WBC_ERR_SUCCESS;
2461 ZERO_STRUCT(logoff);
2463 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2464 if (retval) {
2465 goto out;
2468 _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
2470 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2472 /* destroy the ccache here */
2474 uint32_t wbc_flags = 0;
2475 const char *ccname = NULL;
2476 struct passwd *pwd = NULL;
2478 retval = pam_get_user(pamh, &user, _("Username: "));
2479 if (retval) {
2480 _pam_log(ctx, LOG_ERR,
2481 "could not identify user");
2482 goto out;
2485 if (user == NULL) {
2486 _pam_log(ctx, LOG_ERR,
2487 "username was NULL!");
2488 retval = PAM_USER_UNKNOWN;
2489 goto out;
2492 _pam_log_debug(ctx, LOG_DEBUG,
2493 "username [%s] obtained", user);
2495 ccname = pam_getenv(pamh, "KRB5CCNAME");
2496 if (ccname == NULL) {
2497 _pam_log_debug(ctx, LOG_DEBUG,
2498 "user has no KRB5CCNAME environment");
2501 pwd = getpwnam(user);
2502 if (pwd == NULL) {
2503 retval = PAM_USER_UNKNOWN;
2504 goto out;
2507 wbc_flags = WBFLAG_PAM_KRB5 |
2508 WBFLAG_PAM_CONTACT_TRUSTDOM;
2510 logoff.username = user;
2512 if (ccname) {
2513 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2514 &logoff.blobs,
2515 "ccfilename",
2517 (uint8_t *)ccname,
2518 strlen(ccname)+1);
2519 if (!WBC_ERROR_IS_OK(wbc_status)) {
2520 goto out;
2524 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2525 &logoff.blobs,
2526 "flags",
2528 (uint8_t *)&wbc_flags,
2529 sizeof(wbc_flags));
2530 if (!WBC_ERROR_IS_OK(wbc_status)) {
2531 goto out;
2534 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2535 &logoff.blobs,
2536 "user_uid",
2538 (uint8_t *)&pwd->pw_uid,
2539 sizeof(pwd->pw_uid));
2540 if (!WBC_ERROR_IS_OK(wbc_status)) {
2541 goto out;
2544 wbc_status = wbcLogoffUserEx(&logoff, &error);
2545 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2546 user, "wbcLogoffUser");
2547 wbcFreeMemory(error);
2548 wbcFreeMemory(logoff.blobs);
2549 logoff.blobs = NULL;
2551 if (!WBC_ERROR_IS_OK(wbc_status)) {
2552 _pam_log(ctx, LOG_INFO,
2553 "failed to logoff user %s: %s\n",
2554 user, wbcErrorString(wbc_status));
2558 out:
2559 if (logoff.blobs) {
2560 wbcFreeMemory(logoff.blobs);
2563 if (!WBC_ERROR_IS_OK(wbc_status)) {
2564 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2565 user, "wbcLogoffUser");
2569 * Delete the krb5 ccname variable from the PAM environment
2570 * if it was set by winbind.
2572 if ((ctx->ctrl & WINBIND_KRB5_AUTH) && pam_getenv(pamh, "KRB5CCNAME")) {
2573 pam_putenv(pamh, "KRB5CCNAME");
2576 _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx, retval);
2578 TALLOC_FREE(ctx);
2580 return retval;
2583 PAM_EXTERN
2584 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
2585 int argc, const char **argv)
2587 const char *username;
2588 const char *password;
2589 const char *member = NULL;
2590 const char *cctype = NULL;
2591 int warn_pwd_expire;
2592 int retval = PAM_AUTH_ERR;
2593 char *username_ret = NULL;
2594 char *new_authtok_required = NULL;
2595 char *real_username = NULL;
2596 struct pwb_context *ctx = NULL;
2598 retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2599 if (retval) {
2600 goto out;
2603 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
2605 /* Get the username */
2606 retval = pam_get_user(pamh, &username, NULL);
2607 if ((retval != PAM_SUCCESS) || (!username)) {
2608 _pam_log_debug(ctx, LOG_DEBUG,
2609 "can not get the username");
2610 retval = PAM_SERVICE_ERR;
2611 goto out;
2615 #if defined(AIX)
2616 /* Decode the user name since AIX does not support logn user
2617 names by default. The name is encoded as _#uid. */
2619 if (username[0] == '_') {
2620 uid_t id = atoi(&username[1]);
2621 struct passwd *pw = NULL;
2623 if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
2624 real_username = strdup(pw->pw_name);
2627 #endif
2629 if (!real_username) {
2630 /* Just making a copy of the username we got from PAM */
2631 if ((real_username = strdup(username)) == NULL) {
2632 _pam_log_debug(ctx, LOG_DEBUG,
2633 "memory allocation failure when copying "
2634 "username");
2635 retval = PAM_SERVICE_ERR;
2636 goto out;
2640 /* Maybe this was a UPN */
2642 if (strchr(real_username, '@') != NULL) {
2643 char *samaccountname = NULL;
2645 samaccountname = winbind_upn_to_username(ctx,
2646 real_username);
2647 if (samaccountname) {
2648 free(real_username);
2649 real_username = strdup(samaccountname);
2653 retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
2654 _("Password: "), NULL,
2655 &password);
2657 if (retval != PAM_SUCCESS) {
2658 _pam_log(ctx, LOG_ERR,
2659 "Could not retrieve user's password");
2660 retval = PAM_AUTHTOK_ERR;
2661 goto out;
2664 /* Let's not give too much away in the log file */
2666 #ifdef DEBUG_PASSWORD
2667 _pam_log_debug(ctx, LOG_INFO,
2668 "Verify user '%s' with password '%s'",
2669 real_username, password);
2670 #else
2671 _pam_log_debug(ctx, LOG_INFO,
2672 "Verify user '%s'", real_username);
2673 #endif
2675 member = get_member_from_config(ctx);
2676 cctype = get_krb5_cc_type_from_config(ctx);
2677 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2679 /* Now use the username to look up password */
2680 retval = winbind_auth_request(ctx, real_username, password,
2681 member, cctype, warn_pwd_expire,
2682 NULL, NULL, NULL,
2683 NULL, &username_ret);
2685 if (retval == PAM_NEW_AUTHTOK_REQD ||
2686 retval == PAM_AUTHTOK_EXPIRED) {
2688 char *new_authtok_required_during_auth = NULL;
2690 new_authtok_required = talloc_asprintf(NULL, "%d", retval);
2691 if (!new_authtok_required) {
2692 retval = PAM_BUF_ERR;
2693 goto out;
2696 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2697 new_authtok_required,
2698 _pam_winbind_cleanup_func);
2700 retval = PAM_SUCCESS;
2702 new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
2703 if (!new_authtok_required_during_auth) {
2704 retval = PAM_BUF_ERR;
2705 goto out;
2708 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2709 new_authtok_required_during_auth,
2710 _pam_winbind_cleanup_func);
2712 goto out;
2715 out:
2716 if (username_ret) {
2717 pam_set_item (pamh, PAM_USER, username_ret);
2718 _pam_log_debug(ctx, LOG_INFO,
2719 "Returned user was '%s'", username_ret);
2720 free(username_ret);
2723 if (real_username) {
2724 free(real_username);
2727 if (!new_authtok_required) {
2728 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2731 if (retval != PAM_SUCCESS) {
2732 _pam_free_data_info3(pamh);
2735 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
2737 TALLOC_FREE(ctx);
2739 return retval;
2742 PAM_EXTERN
2743 int pam_sm_setcred(pam_handle_t *pamh, int flags,
2744 int argc, const char **argv)
2746 int ret = PAM_SYSTEM_ERR;
2747 struct pwb_context *ctx = NULL;
2749 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2750 if (ret) {
2751 goto out;
2754 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
2756 switch (flags & ~PAM_SILENT) {
2758 case PAM_DELETE_CRED:
2759 ret = _pam_delete_cred(pamh, flags, argc, argv);
2760 break;
2761 case PAM_REFRESH_CRED:
2762 _pam_log_debug(ctx, LOG_WARNING,
2763 "PAM_REFRESH_CRED not implemented");
2764 ret = PAM_SUCCESS;
2765 break;
2766 case PAM_REINITIALIZE_CRED:
2767 _pam_log_debug(ctx, LOG_WARNING,
2768 "PAM_REINITIALIZE_CRED not implemented");
2769 ret = PAM_SUCCESS;
2770 break;
2771 case PAM_ESTABLISH_CRED:
2772 _pam_log_debug(ctx, LOG_WARNING,
2773 "PAM_ESTABLISH_CRED not implemented");
2774 ret = PAM_SUCCESS;
2775 break;
2776 default:
2777 ret = PAM_SYSTEM_ERR;
2778 break;
2781 out:
2783 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
2785 TALLOC_FREE(ctx);
2787 return ret;
2791 * Account management. We want to verify that the account exists
2792 * before returning PAM_SUCCESS
2794 PAM_EXTERN
2795 int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2796 int argc, const char **argv)
2798 const char *username;
2799 int ret = PAM_USER_UNKNOWN;
2800 void *tmp = NULL;
2801 struct pwb_context *ctx = NULL;
2803 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2804 if (ret) {
2805 goto out;
2808 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
2811 /* Get the username */
2812 ret = pam_get_user(pamh, &username, NULL);
2813 if ((ret != PAM_SUCCESS) || (!username)) {
2814 _pam_log_debug(ctx, LOG_DEBUG,
2815 "can not get the username");
2816 ret = PAM_SERVICE_ERR;
2817 goto out;
2820 /* Verify the username */
2821 ret = valid_user(ctx, username);
2822 switch (ret) {
2823 case -1:
2824 /* some sort of system error. The log was already printed */
2825 ret = PAM_SERVICE_ERR;
2826 goto out;
2827 case 1:
2828 /* the user does not exist */
2829 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
2830 username);
2831 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
2832 ret = PAM_IGNORE;
2833 goto out;
2835 ret = PAM_USER_UNKNOWN;
2836 goto out;
2837 case 0:
2838 pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2839 (const void **)&tmp);
2840 if (tmp != NULL) {
2841 ret = atoi((const char *)tmp);
2842 switch (ret) {
2843 case PAM_AUTHTOK_EXPIRED:
2844 /* fall through, since new token is required in this case */
2845 case PAM_NEW_AUTHTOK_REQD:
2846 _pam_log(ctx, LOG_WARNING,
2847 "pam_sm_acct_mgmt success but %s is set",
2848 PAM_WINBIND_NEW_AUTHTOK_REQD);
2849 _pam_log(ctx, LOG_NOTICE,
2850 "user '%s' needs new password",
2851 username);
2852 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2853 ret = PAM_NEW_AUTHTOK_REQD;
2854 goto out;
2855 default:
2856 _pam_log(ctx, LOG_WARNING,
2857 "pam_sm_acct_mgmt success");
2858 _pam_log(ctx, LOG_NOTICE,
2859 "user '%s' granted access", username);
2860 ret = PAM_SUCCESS;
2861 goto out;
2865 /* Otherwise, the authentication looked good */
2866 _pam_log(ctx, LOG_NOTICE,
2867 "user '%s' granted access", username);
2868 ret = PAM_SUCCESS;
2869 goto out;
2870 default:
2871 /* we don't know anything about this return value */
2872 _pam_log(ctx, LOG_ERR,
2873 "internal module error (ret = %d, user = '%s')",
2874 ret, username);
2875 ret = PAM_SERVICE_ERR;
2876 goto out;
2879 /* should not be reached */
2880 ret = PAM_IGNORE;
2882 out:
2884 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
2886 TALLOC_FREE(ctx);
2888 return ret;
2891 PAM_EXTERN
2892 int pam_sm_open_session(pam_handle_t *pamh, int flags,
2893 int argc, const char **argv)
2895 int ret = PAM_SUCCESS;
2896 struct pwb_context *ctx = NULL;
2898 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2899 if (ret) {
2900 goto out;
2903 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
2905 if (ctx->ctrl & WINBIND_MKHOMEDIR) {
2906 /* check and create homedir */
2907 ret = _pam_mkhomedir(ctx);
2909 out:
2910 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
2912 TALLOC_FREE(ctx);
2914 return ret;
2917 PAM_EXTERN
2918 int pam_sm_close_session(pam_handle_t *pamh, int flags,
2919 int argc, const char **argv)
2921 int ret = PAM_SUCCESS;
2922 struct pwb_context *ctx = NULL;
2924 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2925 if (ret) {
2926 goto out;
2929 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
2931 out:
2932 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
2934 TALLOC_FREE(ctx);
2936 return ret;
2940 * evaluate whether we need to re-authenticate with kerberos after a
2941 * password change
2943 * @param ctx PAM winbind context.
2944 * @param user The username
2946 * @return boolean Returns true if required, false if not.
2949 static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
2950 const char *user)
2953 /* Make sure that we only do this if a) the chauthtok got initiated
2954 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2955 * later password change via the "passwd" command if done by the user
2956 * itself
2957 * NB. If we login from gdm or xdm and the password expires,
2958 * we change the password, but there is no memory cache.
2959 * Thus, even for passthrough login, we should do the
2960 * authentication again to update memory cache.
2961 * --- BoYang
2962 * */
2964 char *new_authtok_reqd_during_auth = NULL;
2965 struct passwd *pwd = NULL;
2967 _pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2968 &new_authtok_reqd_during_auth);
2969 pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2970 NULL, NULL);
2972 if (new_authtok_reqd_during_auth) {
2973 return true;
2976 pwd = getpwnam(user);
2977 if (!pwd) {
2978 return false;
2981 if (getuid() == pwd->pw_uid) {
2982 return true;
2985 return false;
2989 PAM_EXTERN
2990 int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
2991 int argc, const char **argv)
2993 unsigned int lctrl;
2994 int ret;
2995 bool cached_login = false;
2997 /* <DO NOT free() THESE> */
2998 const char *user;
2999 char *pass_old, *pass_new;
3000 /* </DO NOT free() THESE> */
3002 char *Announce;
3004 int retry = 0;
3005 char *username_ret = NULL;
3006 struct wbcAuthErrorInfo *error = NULL;
3007 struct pwb_context *ctx = NULL;
3009 ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
3010 if (ret) {
3011 goto out;
3014 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
3016 cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
3018 /* clearing offline bit for auth */
3019 ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
3022 * First get the name of a user
3024 ret = pam_get_user(pamh, &user, _("Username: "));
3025 if (ret) {
3026 _pam_log(ctx, LOG_ERR,
3027 "password - could not identify user");
3028 goto out;
3031 if (user == NULL) {
3032 _pam_log(ctx, LOG_ERR, "username was NULL!");
3033 ret = PAM_USER_UNKNOWN;
3034 goto out;
3037 _pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
3039 /* check if this is really a user in winbindd, not only in NSS */
3040 ret = valid_user(ctx, user);
3041 switch (ret) {
3042 case 1:
3043 ret = PAM_USER_UNKNOWN;
3044 goto out;
3045 case -1:
3046 ret = PAM_SYSTEM_ERR;
3047 goto out;
3048 default:
3049 break;
3053 * obtain and verify the current password (OLDAUTHTOK) for
3054 * the user.
3057 if (flags & PAM_PRELIM_CHECK) {
3058 time_t pwdlastset_prelim = 0;
3060 /* instruct user what is happening */
3062 #define greeting _("Changing password for")
3063 Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
3064 if (!Announce) {
3065 _pam_log(ctx, LOG_CRIT,
3066 "password - out of memory");
3067 ret = PAM_BUF_ERR;
3068 goto out;
3070 #undef greeting
3072 lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
3073 ret = _winbind_read_password(ctx, lctrl,
3074 Announce,
3075 _("(current) NT password: "),
3076 NULL,
3077 (const char **) &pass_old);
3078 TALLOC_FREE(Announce);
3079 if (ret != PAM_SUCCESS) {
3080 _pam_log(ctx, LOG_NOTICE,
3081 "password - (old) token not obtained");
3082 goto out;
3085 /* verify that this is the password for this user */
3087 ret = winbind_auth_request(ctx, user, pass_old,
3088 NULL, NULL, 0,
3089 &error, NULL, NULL,
3090 &pwdlastset_prelim, NULL);
3092 if (ret != PAM_ACCT_EXPIRED &&
3093 ret != PAM_AUTHTOK_EXPIRED &&
3094 ret != PAM_NEW_AUTHTOK_REQD &&
3095 ret != PAM_SUCCESS) {
3096 pass_old = NULL;
3097 goto out;
3100 pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3101 (void *)pwdlastset_prelim, NULL);
3103 ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
3104 (const void *) pass_old);
3105 pass_old = NULL;
3106 if (ret != PAM_SUCCESS) {
3107 _pam_log(ctx, LOG_CRIT,
3108 "failed to set PAM_OLDAUTHTOK");
3110 } else if (flags & PAM_UPDATE_AUTHTOK) {
3112 time_t pwdlastset_update = 0;
3115 * obtain the proposed password
3119 * get the old token back.
3122 ret = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
3124 if (ret != PAM_SUCCESS) {
3125 _pam_log(ctx, LOG_NOTICE,
3126 "user not authenticated");
3127 goto out;
3130 lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
3132 if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
3133 lctrl |= WINBIND_USE_FIRST_PASS_ARG;
3135 retry = 0;
3136 ret = PAM_AUTHTOK_ERR;
3137 while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
3139 * use_authtok is to force the use of a previously entered
3140 * password -- needed for pluggable password strength checking
3143 ret = _winbind_read_password(ctx, lctrl,
3144 NULL,
3145 _("Enter new NT password: "),
3146 _("Retype new NT password: "),
3147 (const char **)&pass_new);
3149 if (ret != PAM_SUCCESS) {
3150 _pam_log_debug(ctx, LOG_ALERT,
3151 "password - "
3152 "new password not obtained");
3153 pass_old = NULL;/* tidy up */
3154 goto out;
3158 * At this point we know who the user is and what they
3159 * propose as their new password. Verify that the new
3160 * password is acceptable.
3163 if (pass_new[0] == '\0') {/* "\0" password = NULL */
3164 pass_new = NULL;
3169 * By reaching here we have approved the passwords and must now
3170 * rebuild the password database file.
3172 _pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3173 &pwdlastset_update);
3176 * if cached creds were enabled, make sure to set the
3177 * WINBIND_CACHED_LOGIN bit here in order to have winbindd
3178 * update the cached creds storage - gd
3180 if (cached_login) {
3181 ctx->ctrl |= WINBIND_CACHED_LOGIN;
3184 ret = winbind_chauthtok_request(ctx, user, pass_old,
3185 pass_new, pwdlastset_update);
3186 if (ret) {
3187 pass_old = pass_new = NULL;
3188 goto out;
3191 if (_pam_require_krb5_auth_after_chauthtok(ctx, user)) {
3193 const char *member = NULL;
3194 const char *cctype = NULL;
3195 int warn_pwd_expire;
3196 struct wbcLogonUserInfo *info = NULL;
3197 struct wbcUserPasswordPolicyInfo *policy = NULL;
3199 member = get_member_from_config(ctx);
3200 cctype = get_krb5_cc_type_from_config(ctx);
3201 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
3203 /* Keep WINBIND_CACHED_LOGIN bit for
3204 * authentication after changing the password.
3205 * This will update the cached credentials in case
3206 * that winbindd_dual_pam_chauthtok() fails
3207 * to update them.
3208 * --- BoYang
3209 * */
3211 ret = winbind_auth_request(ctx, user, pass_new,
3212 member, cctype, 0,
3213 &error, &info, &policy,
3214 NULL, &username_ret);
3215 pass_old = pass_new = NULL;
3217 if (ret == PAM_SUCCESS) {
3219 struct wbcAuthUserInfo *user_info = NULL;
3221 if (info && info->info) {
3222 user_info = info->info;
3225 /* warn a user if the password is about to
3226 * expire soon */
3227 _pam_warn_password_expiry(ctx, user_info, policy,
3228 warn_pwd_expire,
3229 NULL, NULL);
3231 /* set some info3 info for other modules in the
3232 * stack */
3233 _pam_set_data_info3(ctx, user_info);
3235 /* put krb5ccname into env */
3236 _pam_setup_krb5_env(ctx, info);
3238 if (username_ret) {
3239 pam_set_item(pamh, PAM_USER,
3240 username_ret);
3241 _pam_log_debug(ctx, LOG_INFO,
3242 "Returned user was '%s'",
3243 username_ret);
3244 free(username_ret);
3249 if (info && info->blobs) {
3250 wbcFreeMemory(info->blobs);
3252 wbcFreeMemory(info);
3253 wbcFreeMemory(policy);
3255 goto out;
3257 } else {
3258 ret = PAM_SERVICE_ERR;
3261 out:
3263 /* Deal with offline errors. */
3264 int i;
3265 const char *codes[] = {
3266 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3267 "NT_STATUS_NO_LOGON_SERVERS",
3268 "NT_STATUS_ACCESS_DENIED"
3271 for (i=0; i<ARRAY_SIZE(codes); i++) {
3272 int _ret;
3273 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
3274 break;
3279 wbcFreeMemory(error);
3281 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
3283 TALLOC_FREE(ctx);
3285 return ret;
3288 #ifdef PAM_STATIC
3290 /* static module data */
3292 struct pam_module _pam_winbind_modstruct = {
3293 MODULE_NAME,
3294 pam_sm_authenticate,
3295 pam_sm_setcred,
3296 pam_sm_acct_mgmt,
3297 pam_sm_open_session,
3298 pam_sm_close_session,
3299 pam_sm_chauthtok
3302 #endif
3305 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3306 * Copyright (c) Tim Potter <tpot@samba.org> 2000
3307 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3308 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3309 * Copyright (c) Jan Rêkorajski 1999.
3310 * Copyright (c) Andrew G. Morgan 1996-8.
3311 * Copyright (c) Alex O. Yuriev, 1996.
3312 * Copyright (c) Cristian Gafton 1996.
3313 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3315 * Redistribution and use in source and binary forms, with or without
3316 * modification, are permitted provided that the following conditions
3317 * are met:
3318 * 1. Redistributions of source code must retain the above copyright
3319 * notice, and the entire permission notice in its entirety,
3320 * including the disclaimer of warranties.
3321 * 2. Redistributions in binary form must reproduce the above copyright
3322 * notice, this list of conditions and the following disclaimer in the
3323 * documentation and/or other materials provided with the distribution.
3324 * 3. The name of the author may not be used to endorse or promote
3325 * products derived from this software without specific prior
3326 * written permission.
3328 * ALTERNATIVELY, this product may be distributed under the terms of
3329 * the GNU Public License, in which case the provisions of the GPL are
3330 * required INSTEAD OF the above restrictions. (This clause is
3331 * necessary due to a potential bad interaction between the GPL and
3332 * the restrictions contained in a BSD-style copyright.)
3334 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3335 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3336 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3337 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3338 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3339 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3340 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3341 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3342 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3343 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3344 * OF THE POSSIBILITY OF SUCH DAMAGE.