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
static int wbc_error_to_pam_error(wbcErr status)
20
case WBC_ERR_NOT_IMPLEMENTED:
21
return PAM_SERVICE_ERR;
22
case WBC_ERR_UNKNOWN_FAILURE:
24
case WBC_ERR_NO_MEMORY:
26
case WBC_ERR_INVALID_SID:
27
case WBC_ERR_INVALID_PARAM:
29
case WBC_ERR_WINBIND_NOT_AVAILABLE:
30
return PAM_AUTHINFO_UNAVAIL;
31
case WBC_ERR_DOMAIN_NOT_FOUND:
32
return PAM_AUTHINFO_UNAVAIL;
33
case WBC_ERR_INVALID_RESPONSE:
35
case WBC_ERR_NSS_ERROR:
36
return PAM_USER_UNKNOWN;
37
case WBC_ERR_AUTH_ERROR:
39
case WBC_ERR_UNKNOWN_USER:
40
return PAM_USER_UNKNOWN;
41
case WBC_ERR_UNKNOWN_GROUP:
42
return PAM_USER_UNKNOWN;
43
case WBC_ERR_PWD_CHANGE_FAILED:
51
static const char *_pam_error_code_str(int err)
57
return "PAM_OPEN_ERR";
59
return "PAM_SYMBOL_ERR";
61
return "PAM_SERVICE_ERR";
63
return "PAM_SYSTEM_ERR";
67
return "PAM_PERM_DENIED";
69
return "PAM_AUTH_ERR";
70
case PAM_CRED_INSUFFICIENT:
71
return "PAM_CRED_INSUFFICIENT";
72
case PAM_AUTHINFO_UNAVAIL:
73
return "PAM_AUTHINFO_UNAVAIL";
74
case PAM_USER_UNKNOWN:
75
return "PAM_USER_UNKNOWN";
77
return "PAM_MAXTRIES";
78
case PAM_NEW_AUTHTOK_REQD:
79
return "PAM_NEW_AUTHTOK_REQD";
80
case PAM_ACCT_EXPIRED:
81
return "PAM_ACCT_EXPIRED";
83
return "PAM_SESSION_ERR";
84
case PAM_CRED_UNAVAIL:
85
return "PAM_CRED_UNAVAIL";
86
case PAM_CRED_EXPIRED:
87
return "PAM_CRED_EXPIRED";
89
return "PAM_CRED_ERR";
90
case PAM_NO_MODULE_DATA:
91
return "PAM_NO_MODULE_DATA";
93
return "PAM_CONV_ERR";
95
return "PAM_AUTHTOK_ERR";
96
case PAM_AUTHTOK_RECOVER_ERR:
97
return "PAM_AUTHTOK_RECOVER_ERR";
98
case PAM_AUTHTOK_LOCK_BUSY:
99
return "PAM_AUTHTOK_LOCK_BUSY";
100
case PAM_AUTHTOK_DISABLE_AGING:
101
return "PAM_AUTHTOK_DISABLE_AGING";
103
return "PAM_TRY_AGAIN";
108
case PAM_AUTHTOK_EXPIRED:
109
return "PAM_AUTHTOK_EXPIRED";
110
#ifdef PAM_MODULE_UNKNOWN
111
case PAM_MODULE_UNKNOWN:
112
return "PAM_MODULE_UNKNOWN";
116
return "PAM_BAD_ITEM";
118
#ifdef PAM_CONV_AGAIN
120
return "PAM_CONV_AGAIN";
122
#ifdef PAM_INCOMPLETE
124
return "PAM_INCOMPLETE";
131
#define _PAM_LOG_FUNCTION_ENTER(function, ctx) \
133
_pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] ENTER: " \
134
function " (flags: 0x%04x)", ctx->pamh, ctx->flags); \
135
_pam_log_state(ctx); \
138
#define _PAM_LOG_FUNCTION_LEAVE(function, ctx, retval) \
140
_pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] LEAVE: " \
141
function " returning %d (%s)", ctx->pamh, retval, \
142
_pam_error_code_str(retval)); \
143
_pam_log_state(ctx); \
148
#define MAX_PASSWD_TRIES 3
151
static char initialized = 0;
153
static inline void textdomain_init(void);
154
static inline void textdomain_init(void)
157
bindtextdomain(MODULE_NAME, dyn_LOCALEDIR);
166
* Work around the pam API that has functions with void ** as parameters
167
* These lead to strict aliasing warnings with gcc.
169
static int _pam_get_item(const pam_handle_t *pamh,
173
const void **item = (const void **)_item;
174
return pam_get_item(pamh, item_type, item);
176
static int _pam_get_data(const pam_handle_t *pamh,
177
const char *module_data_name,
180
const void **data = (const void **)_data;
181
return pam_get_data(pamh, module_data_name, data);
184
/* some syslogging */
186
#ifdef HAVE_PAM_VSYSLOG
187
static void _pam_log_int(const pam_handle_t *pamh,
192
pam_vsyslog(pamh, err, format, args);
195
static void _pam_log_int(const pam_handle_t *pamh,
200
char *format2 = NULL;
203
_pam_get_item(pamh, PAM_SERVICE, &service);
205
format2 = (char *)malloc(strlen(MODULE_NAME)+strlen(format)+strlen(service)+5);
206
if (format2 == NULL) {
207
/* what else todo ? */
208
vsyslog(err, format, args);
212
sprintf(format2, "%s(%s): %s", MODULE_NAME, service, format);
213
vsyslog(err, format2, args);
216
#endif /* HAVE_PAM_VSYSLOG */
218
static bool _pam_log_is_silent(int ctrl)
220
return on(ctrl, WINBIND_SILENT);
223
static void _pam_log(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
224
static void _pam_log(struct pwb_context *r, int err, const char *format, ...)
228
if (_pam_log_is_silent(r->ctrl)) {
232
va_start(args, format);
233
_pam_log_int(r->pamh, err, format, args);
236
static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
237
static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
241
if (_pam_log_is_silent(ctrl)) {
245
va_start(args, format);
246
_pam_log_int(pamh, err, format, args);
250
static bool _pam_log_is_debug_enabled(int ctrl)
256
if (_pam_log_is_silent(ctrl)) {
260
if (!(ctrl & WINBIND_DEBUG_ARG)) {
267
static bool _pam_log_is_debug_state_enabled(int ctrl)
269
if (!(ctrl & WINBIND_DEBUG_STATE)) {
273
return _pam_log_is_debug_enabled(ctrl);
276
static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
277
static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...)
281
if (!_pam_log_is_debug_enabled(r->ctrl)) {
285
va_start(args, format);
286
_pam_log_int(r->pamh, err, format, args);
289
static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
290
static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
294
if (!_pam_log_is_debug_enabled(ctrl)) {
298
va_start(args, format);
299
_pam_log_int(pamh, err, format, args);
303
static void _pam_log_state_datum(struct pwb_context *ctx,
308
const void *data = NULL;
309
if (item_type != 0) {
310
pam_get_item(ctx->pamh, item_type, &data);
312
pam_get_data(ctx->pamh, key, &data);
315
const char *type = (item_type != 0) ? "ITEM" : "DATA";
316
if (is_string != 0) {
317
_pam_log_debug(ctx, LOG_DEBUG,
318
"[pamh: %p] STATE: %s(%s) = \"%s\" (%p)",
319
ctx->pamh, type, key, (const char *)data,
322
_pam_log_debug(ctx, LOG_DEBUG,
323
"[pamh: %p] STATE: %s(%s) = %p",
324
ctx->pamh, type, key, data);
329
#define _PAM_LOG_STATE_DATA_POINTER(ctx, module_data_name) \
330
_pam_log_state_datum(ctx, 0, module_data_name, 0)
332
#define _PAM_LOG_STATE_DATA_STRING(ctx, module_data_name) \
333
_pam_log_state_datum(ctx, 0, module_data_name, 1)
335
#define _PAM_LOG_STATE_ITEM_POINTER(ctx, item_type) \
336
_pam_log_state_datum(ctx, item_type, #item_type, 0)
338
#define _PAM_LOG_STATE_ITEM_STRING(ctx, item_type) \
339
_pam_log_state_datum(ctx, item_type, #item_type, 1)
341
#ifdef DEBUG_PASSWORD
342
#define _LOG_PASSWORD_AS_STRING 1
344
#define _LOG_PASSWORD_AS_STRING 0
347
#define _PAM_LOG_STATE_ITEM_PASSWORD(ctx, item_type) \
348
_pam_log_state_datum(ctx, item_type, #item_type, \
349
_LOG_PASSWORD_AS_STRING)
351
static void _pam_log_state(struct pwb_context *ctx)
353
if (!_pam_log_is_debug_state_enabled(ctx->ctrl)) {
357
_PAM_LOG_STATE_ITEM_STRING(ctx, PAM_SERVICE);
358
_PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER);
359
_PAM_LOG_STATE_ITEM_STRING(ctx, PAM_TTY);
360
_PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RHOST);
361
_PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RUSER);
362
_PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_OLDAUTHTOK);
363
_PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_AUTHTOK);
364
_PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER_PROMPT);
365
_PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_CONV);
366
#ifdef PAM_FAIL_DELAY
367
_PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_FAIL_DELAY);
369
#ifdef PAM_REPOSITORY
370
_PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_REPOSITORY);
373
_PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_HOMEDIR);
374
_PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSCRIPT);
375
_PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSERVER);
376
_PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_PROFILEPATH);
377
_PAM_LOG_STATE_DATA_STRING(ctx,
378
PAM_WINBIND_NEW_AUTHTOK_REQD);
379
/* Use atoi to get PAM result code */
380
_PAM_LOG_STATE_DATA_STRING(ctx,
381
PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
382
_PAM_LOG_STATE_DATA_POINTER(ctx, PAM_WINBIND_PWD_LAST_SET);
385
static int _pam_parse(const pam_handle_t *pamh,
389
dictionary **result_d)
392
const char *config_file = NULL;
395
dictionary *d = NULL;
397
if (flags & PAM_SILENT) {
398
ctrl |= WINBIND_SILENT;
401
for (i=argc,v=argv; i-- > 0; ++v) {
402
if (!strncasecmp(*v, "config", strlen("config"))) {
403
ctrl |= WINBIND_CONFIG_FILE;
409
if (config_file == NULL) {
410
config_file = PAM_WINBIND_CONFIG_FILE;
413
d = iniparser_load(config_file);
415
goto config_from_pam;
418
if (iniparser_getboolean(d, "global:debug", false)) {
419
ctrl |= WINBIND_DEBUG_ARG;
422
if (iniparser_getboolean(d, "global:debug_state", false)) {
423
ctrl |= WINBIND_DEBUG_STATE;
426
if (iniparser_getboolean(d, "global:cached_login", false)) {
427
ctrl |= WINBIND_CACHED_LOGIN;
430
if (iniparser_getboolean(d, "global:krb5_auth", false)) {
431
ctrl |= WINBIND_KRB5_AUTH;
434
if (iniparser_getboolean(d, "global:silent", false)) {
435
ctrl |= WINBIND_SILENT;
438
if (iniparser_getstr(d, "global:krb5_ccache_type") != NULL) {
439
ctrl |= WINBIND_KRB5_CCACHE_TYPE;
442
if ((iniparser_getstr(d, "global:require-membership-of") != NULL) ||
443
(iniparser_getstr(d, "global:require_membership_of") != NULL)) {
444
ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
447
if (iniparser_getboolean(d, "global:try_first_pass", false)) {
448
ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
451
if (iniparser_getint(d, "global:warn_pwd_expire", 0)) {
452
ctrl |= WINBIND_WARN_PWD_EXPIRE;
455
if (iniparser_getboolean(d, "global:mkhomedir", false)) {
456
ctrl |= WINBIND_MKHOMEDIR;
460
/* step through arguments */
461
for (i=argc,v=argv; i-- > 0; ++v) {
463
/* generic options */
464
if (!strcmp(*v,"debug"))
465
ctrl |= WINBIND_DEBUG_ARG;
466
else if (!strcasecmp(*v, "debug_state"))
467
ctrl |= WINBIND_DEBUG_STATE;
468
else if (!strcasecmp(*v, "silent"))
469
ctrl |= WINBIND_SILENT;
470
else if (!strcasecmp(*v, "use_authtok"))
471
ctrl |= WINBIND_USE_AUTHTOK_ARG;
472
else if (!strcasecmp(*v, "use_first_pass"))
473
ctrl |= WINBIND_USE_FIRST_PASS_ARG;
474
else if (!strcasecmp(*v, "try_first_pass"))
475
ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
476
else if (!strcasecmp(*v, "unknown_ok"))
477
ctrl |= WINBIND_UNKNOWN_OK_ARG;
478
else if (!strncasecmp(*v, "require_membership_of",
479
strlen("require_membership_of")))
480
ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
481
else if (!strncasecmp(*v, "require-membership-of",
482
strlen("require-membership-of")))
483
ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
484
else if (!strcasecmp(*v, "krb5_auth"))
485
ctrl |= WINBIND_KRB5_AUTH;
486
else if (!strncasecmp(*v, "krb5_ccache_type",
487
strlen("krb5_ccache_type")))
488
ctrl |= WINBIND_KRB5_CCACHE_TYPE;
489
else if (!strcasecmp(*v, "cached_login"))
490
ctrl |= WINBIND_CACHED_LOGIN;
491
else if (!strcasecmp(*v, "mkhomedir"))
492
ctrl |= WINBIND_MKHOMEDIR;
494
__pam_log(pamh, ctrl, LOG_ERR,
495
"pam_parse: unknown option: %s", *v);
505
iniparser_freedict(d);
512
static int _pam_winbind_free_context(struct pwb_context *ctx)
519
iniparser_freedict(ctx->dict);
525
static int _pam_winbind_init_context(pam_handle_t *pamh,
529
struct pwb_context **ctx_p)
531
struct pwb_context *r = NULL;
537
r = TALLOC_ZERO_P(NULL, struct pwb_context);
542
talloc_set_destructor(r, _pam_winbind_free_context);
548
r->ctrl = _pam_parse(pamh, flags, argc, argv, &r->dict);
551
return PAM_SYSTEM_ERR;
559
static void _pam_winbind_cleanup_func(pam_handle_t *pamh,
563
int ctrl = _pam_parse(pamh, 0, 0, NULL, NULL);
564
if (_pam_log_is_debug_state_enabled(ctrl)) {
565
__pam_log_debug(pamh, ctrl, LOG_DEBUG,
566
"[pamh: %p] CLEAN: cleaning up PAM data %p "
567
"(error_status = %d)", pamh, data,
574
static const struct ntstatus_errors {
575
const char *ntstatus_string;
576
const char *error_string;
577
} ntstatus_errors[] = {
580
{"NT_STATUS_BACKUP_CONTROLLER",
581
N_("No primary Domain Controler available")},
582
{"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
583
N_("No domain controllers found")},
584
{"NT_STATUS_NO_LOGON_SERVERS",
585
N_("No logon servers")},
586
{"NT_STATUS_PWD_TOO_SHORT",
587
N_("Password too short")},
588
{"NT_STATUS_PWD_TOO_RECENT",
589
N_("The password of this user is too recent to change")},
590
{"NT_STATUS_PWD_HISTORY_CONFLICT",
591
N_("Password is already in password history")},
592
{"NT_STATUS_PASSWORD_EXPIRED",
593
N_("Your password has expired")},
594
{"NT_STATUS_PASSWORD_MUST_CHANGE",
595
N_("You need to change your password now")},
596
{"NT_STATUS_INVALID_WORKSTATION",
597
N_("You are not allowed to logon from this workstation")},
598
{"NT_STATUS_INVALID_LOGON_HOURS",
599
N_("You are not allowed to logon at this time")},
600
{"NT_STATUS_ACCOUNT_EXPIRED",
601
N_("Your account has expired. "
602
"Please contact your System administrator")}, /* SCNR */
603
{"NT_STATUS_ACCOUNT_DISABLED",
604
N_("Your account is disabled. "
605
"Please contact your System administrator")}, /* SCNR */
606
{"NT_STATUS_ACCOUNT_LOCKED_OUT",
607
N_("Your account has been locked. "
608
"Please contact your System administrator")}, /* SCNR */
609
{"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
610
N_("Invalid Trust Account")},
611
{"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
612
N_("Invalid Trust Account")},
613
{"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
614
N_("Invalid Trust Account")},
615
{"NT_STATUS_ACCESS_DENIED",
616
N_("Access is denied")},
620
static const char *_get_ntstatus_error_string(const char *nt_status_string)
623
for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
624
if (!strcasecmp(ntstatus_errors[i].ntstatus_string,
626
return _(ntstatus_errors[i].error_string);
632
/* --- authentication management functions --- */
634
/* Attempt a conversation */
636
static int converse(const pam_handle_t *pamh,
638
struct pam_message **message,
639
struct pam_response **response)
642
struct pam_conv *conv;
644
retval = _pam_get_item(pamh, PAM_CONV, &conv);
645
if (retval == PAM_SUCCESS) {
646
retval = conv->conv(nargs,
647
(const struct pam_message **)message,
648
response, conv->appdata_ptr);
651
return retval; /* propagate error status */
655
static int _make_remark(struct pwb_context *ctx,
659
int retval = PAM_SUCCESS;
661
struct pam_message *pmsg[1], msg[1];
662
struct pam_response *resp;
664
if (ctx->flags & WINBIND_SILENT) {
669
msg[0].msg = discard_const_p(char, text);
670
msg[0].msg_style = type;
673
retval = converse(ctx->pamh, 1, pmsg, &resp);
676
_pam_drop_reply(resp, 1);
681
static int _make_remark_v(struct pwb_context *ctx,
689
ret = vasprintf(&var, format, args);
691
_pam_log(ctx, LOG_ERR, "memory allocation failure");
695
ret = _make_remark(ctx, type, var);
700
static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
701
static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...)
706
va_start(args, format);
707
ret = _make_remark_v(ctx, type, format, args);
712
static int pam_winbind_request_log(struct pwb_context *ctx,
719
/* incorrect password */
720
_pam_log(ctx, LOG_WARNING, "user '%s' denied access "
721
"(incorrect password or invalid membership)", user);
723
case PAM_ACCT_EXPIRED:
724
/* account expired */
725
_pam_log(ctx, LOG_WARNING, "user '%s' account expired",
728
case PAM_AUTHTOK_EXPIRED:
729
/* password expired */
730
_pam_log(ctx, LOG_WARNING, "user '%s' password expired",
733
case PAM_NEW_AUTHTOK_REQD:
734
/* new password required */
735
_pam_log(ctx, LOG_WARNING, "user '%s' new password "
738
case PAM_USER_UNKNOWN:
739
/* the user does not exist */
740
_pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
742
if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
747
/* Otherwise, the authentication looked good */
748
if (strcmp(fn, "wbcLogonUser") == 0) {
749
_pam_log(ctx, LOG_NOTICE,
750
"user '%s' granted access", user);
752
_pam_log(ctx, LOG_NOTICE,
753
"user '%s' OK", user);
757
/* we don't know anything about this return value */
758
_pam_log(ctx, LOG_ERR,
759
"internal module error (retval = %s(%d), user = '%s')",
760
_pam_error_code_str(retval), retval, user);
765
static int wbc_auth_error_to_pam_error(struct pwb_context *ctx,
766
struct wbcAuthErrorInfo *e,
768
const char *username,
771
int ret = PAM_AUTH_ERR;
773
if (WBC_ERROR_IS_OK(status)) {
774
_pam_log_debug(ctx, LOG_DEBUG, "request %s succeeded",
777
return pam_winbind_request_log(ctx, ret, username, fn);
781
if (e->pam_error != PAM_SUCCESS) {
782
_pam_log(ctx, LOG_ERR,
783
"request %s failed: %s, "
784
"PAM error: %s (%d), NTSTATUS: %s, "
785
"Error message was: %s",
787
wbcErrorString(status),
788
_pam_error_code_str(e->pam_error),
793
return pam_winbind_request_log(ctx, ret, username, fn);
796
_pam_log(ctx, LOG_ERR, "request %s failed, but PAM error 0!", fn);
798
ret = PAM_SERVICE_ERR;
799
return pam_winbind_request_log(ctx, ret, username, fn);
802
ret = wbc_error_to_pam_error(status);
803
return pam_winbind_request_log(ctx, ret, username, fn);
808
* send a password expiry message if required
810
* @param ctx PAM winbind context.
811
* @param next_change expected (calculated) next expiry date.
812
* @param already_expired pointer to a boolean to indicate if the password is
815
* @return boolean Returns true if message has been sent, false if not.
818
static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
822
bool *already_expired)
825
struct tm tm_now, tm_next_change;
827
if (already_expired) {
828
*already_expired = false;
831
if (next_change <= now) {
832
PAM_WB_REMARK_DIRECT(ctx, "NT_STATUS_PASSWORD_EXPIRED");
833
if (already_expired) {
834
*already_expired = true;
839
if ((next_change < 0) ||
840
(next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
844
if ((localtime_r(&now, &tm_now) == NULL) ||
845
(localtime_r(&next_change, &tm_next_change) == NULL)) {
849
days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) -
850
(tm_now.tm_yday+tm_now.tm_year*365);
853
_make_remark(ctx, PAM_TEXT_INFO,
854
_("Your password expires today"));
858
if (days > 0 && days < warn_pwd_expire) {
859
_make_remark_format(ctx, PAM_TEXT_INFO,
860
_("Your password will expire in %d %s"),
861
days, (days > 1) ? _("days"):_("day"));
869
* Send a warning if the password expires in the near future
871
* @param ctx PAM winbind context.
872
* @param response The full authentication response structure.
873
* @param already_expired boolean, is the pwd already expired?
878
static void _pam_warn_password_expiry(struct pwb_context *ctx,
879
const struct wbcAuthUserInfo *info,
880
const struct wbcUserPasswordPolicyInfo *policy,
882
bool *already_expired)
884
time_t now = time(NULL);
885
time_t next_change = 0;
887
if (!info || !policy) {
891
if (already_expired) {
892
*already_expired = false;
895
/* accounts with WBC_ACB_PWNOEXP set never receive a warning */
896
if (info->acct_flags & WBC_ACB_PWNOEXP) {
900
/* no point in sending a warning if this is a grace logon */
901
if (PAM_WB_GRACE_LOGON(info->user_flags)) {
905
/* check if the info3 must change timestamp has been set */
906
next_change = info->pass_must_change_time;
908
if (_pam_send_password_expiry_message(ctx, next_change, now,
914
/* now check for the global password policy */
915
/* good catch from Ralf Haferkamp: an expiry of "never" is translated
917
if ((policy->expire == (int64_t)-1) ||
918
(policy->expire == 0)) {
922
next_change = info->pass_last_set_time + policy->expire;
924
if (_pam_send_password_expiry_message(ctx, next_change, now,
930
/* no warning sent */
933
#define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
936
* Append a string, making sure not to overflow and to always return a
937
* NULL-terminated string.
939
* @param dest Destination string buffer (must already be NULL-terminated).
940
* @param src Source string buffer.
941
* @param dest_buffer_size Size of dest buffer in bytes.
943
* @return false if dest buffer is not big enough (no bytes copied), true on
947
static bool safe_append_string(char *dest,
949
int dest_buffer_size)
951
int dest_length = strlen(dest);
952
int src_length = strlen(src);
954
if (dest_length + src_length + 1 > dest_buffer_size) {
958
memcpy(dest + dest_length, src, src_length + 1);
963
* Convert a names into a SID string, appending it to a buffer.
965
* @param ctx PAM winbind context.
966
* @param user User in PAM request.
967
* @param name Name to convert.
968
* @param sid_list_buffer Where to append the string sid.
969
* @param sid_list_buffer Size of sid_list_buffer (in bytes).
971
* @return false on failure, true on success.
973
static bool winbind_name_to_sid_string(struct pwb_context *ctx,
976
char *sid_list_buffer,
977
int sid_list_buffer_size)
979
const char* sid_string = NULL;
980
char *sid_str = NULL;
983
if (IS_SID_STRING(name)) {
987
struct wbcDomainSid sid;
988
enum wbcSidType type;
990
_pam_log_debug(ctx, LOG_DEBUG,
991
"no sid given, looking up: %s\n", name);
993
wbc_status = wbcLookupName("", name, &sid, &type);
994
if (!WBC_ERROR_IS_OK(wbc_status)) {
995
_pam_log(ctx, LOG_INFO,
996
"could not lookup name: %s\n", name);
1000
wbc_status = wbcSidToString(&sid, &sid_str);
1001
if (!WBC_ERROR_IS_OK(wbc_status)) {
1005
sid_string = sid_str;
1008
if (!safe_append_string(sid_list_buffer, sid_string,
1009
sid_list_buffer_size)) {
1010
wbcFreeMemory(sid_str);
1014
wbcFreeMemory(sid_str);
1019
* Convert a list of names into a list of sids.
1021
* @param ctx PAM winbind context.
1022
* @param user User in PAM request.
1023
* @param name_list List of names or string sids, separated by commas.
1024
* @param sid_list_buffer Where to put the list of string sids.
1025
* @param sid_list_buffer Size of sid_list_buffer (in bytes).
1027
* @return false on failure, true on success.
1029
static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
1031
const char *name_list,
1032
char *sid_list_buffer,
1033
int sid_list_buffer_size)
1035
bool result = false;
1036
char *current_name = NULL;
1037
const char *search_location;
1041
if (sid_list_buffer_size > 0) {
1042
sid_list_buffer[0] = 0;
1045
search_location = name_list;
1046
while ((comma = strstr(search_location, ",")) != NULL) {
1047
current_name = strndup(search_location,
1048
comma - search_location);
1049
if (NULL == current_name) {
1053
if (!winbind_name_to_sid_string(ctx, user,
1056
sid_list_buffer_size)) {
1058
* If one group name failed, we must not fail
1059
* the authentication totally, continue with
1060
* the following group names. If user belongs to
1061
* one of the valid groups, we must allow it
1065
_pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1066
"check if group %s is valid group.", current_name,
1068
_make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1069
"to sid, please contact your administrator to see "
1070
"if group %s is valid."), current_name, current_name);
1071
SAFE_FREE(current_name);
1072
search_location = comma + 1;
1076
SAFE_FREE(current_name);
1078
if (!safe_append_string(sid_list_buffer, ",",
1079
sid_list_buffer_size)) {
1083
search_location = comma + 1;
1086
if (!winbind_name_to_sid_string(ctx, user, search_location,
1088
sid_list_buffer_size)) {
1089
_pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1090
"check if group %s is valid group.", search_location,
1092
_make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1093
"to sid, please contact your administrator to see "
1094
"if group %s is valid."), search_location, search_location);
1096
* The lookup of the last name failed..
1097
* It results in require_member_of_sid ends with ','
1098
* It is malformated parameter here, overwrite the last ','.
1100
len = strlen(sid_list_buffer);
1102
if (sid_list_buffer[len - 1] == ',') {
1103
sid_list_buffer[len - 1] = '\0';
1111
SAFE_FREE(current_name);
1116
* put krb5ccname variable into environment
1118
* @param ctx PAM winbind context.
1119
* @param krb5ccname env variable retrieved from winbindd.
1124
static void _pam_setup_krb5_env(struct pwb_context *ctx,
1125
struct wbcLogonUserInfo *info)
1130
const char *krb5ccname = NULL;
1132
if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
1140
for (i=0; i < info->num_blobs; i++) {
1141
if (strcasecmp(info->blobs[i].name, "krb5ccname") == 0) {
1142
krb5ccname = (const char *)info->blobs[i].blob.data;
1147
if (!krb5ccname || (strlen(krb5ccname) == 0)) {
1151
_pam_log_debug(ctx, LOG_DEBUG,
1152
"request returned KRB5CCNAME: %s", krb5ccname);
1154
if (snprintf(var, sizeof(var), "KRB5CCNAME=%s", krb5ccname) == -1) {
1158
ret = pam_putenv(ctx->pamh, var);
1160
_pam_log(ctx, LOG_ERR,
1161
"failed to set KRB5CCNAME to %s: %s",
1162
var, pam_strerror(ctx->pamh, ret));
1167
* Copy unix username if available (further processed in PAM).
1169
* @param ctx PAM winbind context
1170
* @param user_ret A pointer that holds a pointer to a string
1171
* @param unix_username A username
1176
static void _pam_setup_unix_username(struct pwb_context *ctx,
1178
struct wbcLogonUserInfo *info)
1180
const char *unix_username = NULL;
1183
if (!user_ret || !info) {
1187
for (i=0; i < info->num_blobs; i++) {
1188
if (strcasecmp(info->blobs[i].name, "unix_username") == 0) {
1189
unix_username = (const char *)info->blobs[i].blob.data;
1194
if (!unix_username || !unix_username[0]) {
1198
*user_ret = strdup(unix_username);
1202
* Set string into the PAM stack.
1204
* @param ctx PAM winbind context.
1205
* @param data_name Key name for pam_set_data.
1206
* @param value String value.
1211
static void _pam_set_data_string(struct pwb_context *ctx,
1212
const char *data_name,
1217
if (!data_name || !value || (strlen(data_name) == 0) ||
1218
(strlen(value) == 0)) {
1222
ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
1223
_pam_winbind_cleanup_func);
1225
_pam_log_debug(ctx, LOG_DEBUG,
1226
"Could not set data %s: %s\n",
1227
data_name, pam_strerror(ctx->pamh, ret));
1232
* Set info3 strings into the PAM stack.
1234
* @param ctx PAM winbind context.
1235
* @param data_name Key name for pam_set_data.
1236
* @param value String value.
1241
static void _pam_set_data_info3(struct pwb_context *ctx,
1242
const struct wbcAuthUserInfo *info)
1244
_pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
1245
info->home_directory);
1246
_pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
1247
info->logon_script);
1248
_pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
1249
info->logon_server);
1250
_pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
1251
info->profile_path);
1255
* Free info3 strings in the PAM stack.
1257
* @param pamh PAM handle
1262
static void _pam_free_data_info3(pam_handle_t *pamh)
1264
pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1265
pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1266
pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1267
pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1271
* Send PAM_ERROR_MSG for cached or grace logons.
1273
* @param ctx PAM winbind context.
1274
* @param username User in PAM request.
1275
* @param info3_user_flgs Info3 flags containing logon type bits.
1280
static void _pam_warn_logon_type(struct pwb_context *ctx,
1281
const char *username,
1282
uint32_t info3_user_flgs)
1284
/* inform about logon type */
1285
if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1287
_make_remark(ctx, PAM_ERROR_MSG,
1289
"Please change your password as soon you're "
1291
_pam_log_debug(ctx, LOG_DEBUG,
1292
"User %s logged on using grace logon\n",
1295
} else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1297
_make_remark(ctx, PAM_ERROR_MSG,
1298
_("Domain Controller unreachable, "
1299
"using cached credentials instead. "
1300
"Network resources may be unavailable"));
1301
_pam_log_debug(ctx, LOG_DEBUG,
1302
"User %s logged on using cached credentials\n",
1308
* Send PAM_ERROR_MSG for krb5 errors.
1310
* @param ctx PAM winbind context.
1311
* @param username User in PAM request.
1312
* @param info3_user_flgs Info3 flags containing logon type bits.
1317
static void _pam_warn_krb5_failure(struct pwb_context *ctx,
1318
const char *username,
1319
uint32_t info3_user_flgs)
1321
if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1322
_make_remark(ctx, PAM_ERROR_MSG,
1323
_("Failed to establish your Kerberos Ticket cache "
1324
"due time differences\n"
1325
"with the domain controller. "
1326
"Please verify the system time.\n"));
1327
_pam_log_debug(ctx, LOG_DEBUG,
1328
"User %s: Clock skew when getting Krb5 TGT\n",
1333
static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
1334
const struct wbcAuthErrorInfo *e,
1335
const char *nt_status_string,
1338
const char *ntstatus = NULL;
1339
const char *error_string = NULL;
1341
if (!e || !pam_error) {
1345
ntstatus = e->nt_string;
1350
if (strcasecmp(ntstatus, nt_status_string) == 0) {
1352
error_string = _get_ntstatus_error_string(nt_status_string);
1354
_make_remark(ctx, PAM_ERROR_MSG, error_string);
1355
*pam_error = e->pam_error;
1359
if (e->display_string) {
1360
_make_remark(ctx, PAM_ERROR_MSG, e->display_string);
1361
*pam_error = e->pam_error;
1365
_make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
1366
*pam_error = e->pam_error;
1375
* Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1377
* @param i The wbcUserPasswordPolicyInfo struct.
1379
* @return string (caller needs to talloc_free).
1382
static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
1383
struct wbcUserPasswordPolicyInfo *i)
1391
str = talloc_asprintf(ctx, _("Your password "));
1396
if (i->min_length_password > 0) {
1397
str = talloc_asprintf_append(str,
1398
_("must be at least %d characters; "),
1399
i->min_length_password);
1405
if (i->password_history > 0) {
1406
str = talloc_asprintf_append(str,
1407
_("cannot repeat any of your previous %d "
1409
i->password_history);
1415
if (i->password_properties & WBC_DOMAIN_PASSWORD_COMPLEX) {
1416
str = talloc_asprintf_append(str,
1417
_("must contain capitals, numerals "
1419
"and cannot contain your account "
1426
str = talloc_asprintf_append(str,
1427
_("Please type a different password. "
1428
"Type a password which meets these requirements in "
1429
"both text boxes."));
1441
static int _pam_create_homedir(struct pwb_context *ctx,
1442
const char *dirname,
1447
if (stat(dirname, &sbuf) == 0) {
1451
if (mkdir(dirname, mode) != 0) {
1453
_make_remark_format(ctx, PAM_TEXT_INFO,
1454
_("Creating directory: %s failed: %s"),
1455
dirname, strerror(errno));
1456
_pam_log(ctx, LOG_ERR, "could not create dir: %s (%s)",
1457
dirname, strerror(errno));
1458
return PAM_PERM_DENIED;
1464
static int _pam_chown_homedir(struct pwb_context *ctx,
1465
const char *dirname,
1469
if (chown(dirname, uid, gid) != 0) {
1470
_pam_log(ctx, LOG_ERR, "failed to chown user homedir: %s (%s)",
1471
dirname, strerror(errno));
1472
return PAM_PERM_DENIED;
1478
static int _pam_mkhomedir(struct pwb_context *ctx)
1480
struct passwd *pwd = NULL;
1482
char *create_dir = NULL;
1483
char *user_dir = NULL;
1485
const char *username;
1487
char *safe_ptr = NULL;
1490
/* Get the username */
1491
ret = pam_get_user(ctx->pamh, &username, NULL);
1492
if ((ret != PAM_SUCCESS) || (!username)) {
1493
_pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1494
return PAM_SERVICE_ERR;
1497
pwd = getpwnam(username);
1499
_pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1500
return PAM_USER_UNKNOWN;
1502
_pam_log_debug(ctx, LOG_DEBUG, "homedir is: %s", pwd->pw_dir);
1504
ret = _pam_create_homedir(ctx, pwd->pw_dir, 0700);
1505
if (ret == PAM_SUCCESS) {
1506
ret = _pam_chown_homedir(ctx, pwd->pw_dir,
1511
if (ret == PAM_SUCCESS) {
1515
/* maybe we need to create parent dirs */
1516
create_dir = talloc_strdup(ctx, "/");
1521
/* find final directory */
1522
user_dir = strrchr(pwd->pw_dir, '/');
1528
_pam_log(ctx, LOG_DEBUG, "final directory: %s", user_dir);
1532
while ((token = strtok_r(p, "/", &safe_ptr)) != NULL) {
1538
_pam_log_debug(ctx, LOG_DEBUG, "token is %s", token);
1540
create_dir = talloc_asprintf_append(create_dir, "%s/", token);
1544
_pam_log_debug(ctx, LOG_DEBUG, "current_dir is %s", create_dir);
1546
if (strcmp(token, user_dir) == 0) {
1547
_pam_log_debug(ctx, LOG_DEBUG, "assuming last directory: %s", token);
1551
ret = _pam_create_homedir(ctx, create_dir, mode);
1557
return _pam_chown_homedir(ctx, create_dir,
1562
/* talk to winbindd */
1563
static int winbind_auth_request(struct pwb_context *ctx,
1568
const int warn_pwd_expire,
1569
struct wbcAuthErrorInfo **p_error,
1570
struct wbcLogonUserInfo **p_info,
1571
struct wbcUserPasswordPolicyInfo **p_policy,
1572
time_t *pwd_last_set,
1577
struct wbcLogonUserParams logon;
1578
char membership_of[1024];
1579
uid_t user_uid = -1;
1580
uint32_t flags = WBFLAG_PAM_INFO3_TEXT |
1581
WBFLAG_PAM_GET_PWD_POLICY;
1583
struct wbcLogonUserInfo *info = NULL;
1584
struct wbcAuthUserInfo *user_info = NULL;
1585
struct wbcAuthErrorInfo *error = NULL;
1586
struct wbcUserPasswordPolicyInfo *policy = NULL;
1588
int ret = PAM_AUTH_ERR;
1590
const char *codes[] = {
1591
"NT_STATUS_PASSWORD_EXPIRED",
1592
"NT_STATUS_PASSWORD_MUST_CHANGE",
1593
"NT_STATUS_INVALID_WORKSTATION",
1594
"NT_STATUS_INVALID_LOGON_HOURS",
1595
"NT_STATUS_ACCOUNT_EXPIRED",
1596
"NT_STATUS_ACCOUNT_DISABLED",
1597
"NT_STATUS_ACCOUNT_LOCKED_OUT",
1598
"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1599
"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1600
"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1601
"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1602
"NT_STATUS_NO_LOGON_SERVERS",
1603
"NT_STATUS_WRONG_PASSWORD",
1604
"NT_STATUS_ACCESS_DENIED"
1611
/* Krb5 auth always has to go against the KDC of the user's realm */
1613
if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1614
flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
1617
if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1618
struct passwd *pwd = NULL;
1620
pwd = getpwnam(user);
1622
return PAM_USER_UNKNOWN;
1624
user_uid = pwd->pw_uid;
1627
if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1629
_pam_log_debug(ctx, LOG_DEBUG,
1630
"enabling krb5 login flag\n");
1632
flags |= WBFLAG_PAM_KRB5 |
1633
WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1636
if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1637
_pam_log_debug(ctx, LOG_DEBUG,
1638
"enabling cached login flag\n");
1639
flags |= WBFLAG_PAM_CACHED_LOGIN;
1644
flags |= WBFLAG_PAM_UNIX_NAME;
1647
if (cctype != NULL) {
1648
_pam_log_debug(ctx, LOG_DEBUG,
1649
"enabling request for a %s krb5 ccache\n",
1653
if (member != NULL) {
1655
ZERO_STRUCT(membership_of);
1657
if (!winbind_name_list_to_sid_string_list(ctx, user, member,
1659
sizeof(membership_of))) {
1660
_pam_log_debug(ctx, LOG_ERR,
1661
"failed to serialize membership of sid "
1662
"\"%s\"\n", member);
1663
return PAM_AUTH_ERR;
1669
logon.username = user;
1670
logon.password = pass;
1673
wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1679
if (!WBC_ERROR_IS_OK(wbc_status)) {
1684
wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1690
if (!WBC_ERROR_IS_OK(wbc_status)) {
1694
wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1698
(uint8_t *)&user_uid,
1700
if (!WBC_ERROR_IS_OK(wbc_status)) {
1705
wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1709
(uint8_t *)membership_of,
1710
sizeof(membership_of));
1711
if (!WBC_ERROR_IS_OK(wbc_status)) {
1716
wbc_status = wbcLogonUser(&logon, &info, &error, &policy);
1717
ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1718
user, "wbcLogonUser");
1719
wbcFreeMemory(logon.blobs);
1722
if (info && info->info) {
1723
user_info = info->info;
1726
if (pwd_last_set && user_info) {
1727
*pwd_last_set = user_info->pass_last_set_time;
1730
if (p_info && info) {
1734
if (p_policy && policy) {
1738
if (p_error && error) {
1739
/* We want to process the error in the caller. */
1744
for (i=0; i<ARRAY_SIZE(codes); i++) {
1746
if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1752
if ((ret == PAM_SUCCESS) && user_info && policy && info) {
1754
bool already_expired = false;
1756
/* warn a user if the password is about to expire soon */
1757
_pam_warn_password_expiry(ctx, user_info, policy,
1761
if (already_expired == true) {
1763
SMB_TIME_T last_set = user_info->pass_last_set_time;
1765
_pam_log_debug(ctx, LOG_DEBUG,
1766
"Password has expired "
1767
"(Password was last set: %lld, "
1768
"the policy says it should expire here "
1769
"%lld (now it's: %lu))\n",
1770
(long long int)last_set,
1771
(long long int)last_set +
1775
return PAM_AUTHTOK_EXPIRED;
1778
/* inform about logon type */
1779
_pam_warn_logon_type(ctx, user, user_info->user_flags);
1781
/* inform about krb5 failures */
1782
_pam_warn_krb5_failure(ctx, user, user_info->user_flags);
1784
/* set some info3 info for other modules in the stack */
1785
_pam_set_data_info3(ctx, user_info);
1787
/* put krb5ccname into env */
1788
_pam_setup_krb5_env(ctx, info);
1790
/* If winbindd returned a username, return the pointer to it
1792
_pam_setup_unix_username(ctx, user_ret, info);
1797
wbcFreeMemory(logon.blobs);
1799
if (info && info->blobs && !p_info) {
1800
wbcFreeMemory(info->blobs);
1802
if (error && !p_error) {
1803
wbcFreeMemory(error);
1805
if (info && !p_info) {
1806
wbcFreeMemory(info);
1808
if (policy && !p_policy) {
1809
wbcFreeMemory(policy);
1815
/* talk to winbindd */
1816
static int winbind_chauthtok_request(struct pwb_context *ctx,
1818
const char *oldpass,
1819
const char *newpass,
1820
time_t pwd_last_set)
1823
struct wbcChangePasswordParams params;
1824
struct wbcAuthErrorInfo *error = NULL;
1825
struct wbcUserPasswordPolicyInfo *policy = NULL;
1826
enum wbcPasswordChangeRejectReason reject_reason = -1;
1830
const char *codes[] = {
1831
"NT_STATUS_BACKUP_CONTROLLER",
1832
"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1833
"NT_STATUS_NO_LOGON_SERVERS",
1834
"NT_STATUS_ACCESS_DENIED",
1835
"NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1836
"NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1837
"NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1839
int ret = PAM_AUTH_ERR;
1841
ZERO_STRUCT(params);
1843
if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1844
flags |= WBFLAG_PAM_KRB5 |
1845
WBFLAG_PAM_CONTACT_TRUSTDOM;
1848
if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1849
flags |= WBFLAG_PAM_CACHED_LOGIN;
1852
params.account_name = user;
1853
params.level = WBC_AUTH_USER_LEVEL_PLAIN;
1854
params.old_password.plaintext = oldpass;
1855
params.new_password.plaintext = newpass;
1856
params.flags = flags;
1858
wbc_status = wbcChangeUserPasswordEx(¶ms, &error, &reject_reason, &policy);
1859
ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1860
user, "wbcChangeUserPasswordEx");
1862
if (WBC_ERROR_IS_OK(wbc_status)) {
1863
_pam_log(ctx, LOG_NOTICE,
1864
"user '%s' password changed", user);
1869
wbcFreeMemory(policy);
1873
for (i=0; i<ARRAY_SIZE(codes); i++) {
1875
if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1881
if (!strcasecmp(error->nt_string,
1882
"NT_STATUS_PASSWORD_RESTRICTION")) {
1884
char *pwd_restriction_string = NULL;
1885
SMB_TIME_T min_pwd_age = 0;
1888
min_pwd_age = policy->min_passwordage;
1891
/* FIXME: avoid to send multiple PAM messages after another */
1892
switch (reject_reason) {
1895
case WBC_PWD_CHANGE_REJECT_OTHER:
1896
if ((min_pwd_age > 0) &&
1897
(pwd_last_set + min_pwd_age > time(NULL))) {
1898
PAM_WB_REMARK_DIRECT(ctx,
1899
"NT_STATUS_PWD_TOO_RECENT");
1902
case WBC_PWD_CHANGE_REJECT_TOO_SHORT:
1903
PAM_WB_REMARK_DIRECT(ctx,
1904
"NT_STATUS_PWD_TOO_SHORT");
1906
case WBC_PWD_CHANGE_REJECT_IN_HISTORY:
1907
PAM_WB_REMARK_DIRECT(ctx,
1908
"NT_STATUS_PWD_HISTORY_CONFLICT");
1910
case WBC_PWD_CHANGE_REJECT_COMPLEXITY:
1911
_make_remark(ctx, PAM_ERROR_MSG,
1912
_("Password does not meet "
1913
"complexity requirements"));
1916
_pam_log_debug(ctx, LOG_DEBUG,
1917
"unknown password change "
1918
"reject reason: %d",
1923
pwd_restriction_string =
1924
_pam_compose_pwd_restriction_string(ctx, policy);
1925
if (pwd_restriction_string) {
1926
_make_remark(ctx, PAM_ERROR_MSG,
1927
pwd_restriction_string);
1928
TALLOC_FREE(pwd_restriction_string);
1932
wbcFreeMemory(error);
1933
wbcFreeMemory(policy);
1939
* Checks if a user has an account
1942
* 1 = User not found
1946
static int valid_user(struct pwb_context *ctx,
1949
/* check not only if the user is available over NSS calls, also make
1950
* sure it's really a winbind user, this is important when stacking PAM
1951
* modules in the 'account' or 'password' facility. */
1954
struct passwd *pwd = NULL;
1955
struct passwd *wb_pwd = NULL;
1957
pwd = getpwnam(user);
1962
wbc_status = wbcGetpwnam(user, &wb_pwd);
1963
wbcFreeMemory(wb_pwd);
1964
if (!WBC_ERROR_IS_OK(wbc_status)) {
1965
_pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
1966
wbcErrorString(wbc_status));
1969
switch (wbc_status) {
1970
case WBC_ERR_UNKNOWN_USER:
1972
case WBC_ERR_SUCCESS:
1980
static char *_pam_delete(register char *xx)
1988
* obtain a password from the user
1991
static int _winbind_read_password(struct pwb_context *ctx,
1993
const char *comment,
1994
const char *prompt1,
1995
const char *prompt2,
2003
_pam_log(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
2006
* make sure nothing inappropriate gets returned
2009
*pass = token = NULL;
2012
* which authentication token are we getting?
2015
if (on(WINBIND__OLD_PASSWORD, ctrl)) {
2016
authtok_flag = PAM_OLDAUTHTOK;
2018
authtok_flag = PAM_AUTHTOK;
2022
* should we obtain the password from a PAM item ?
2025
if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
2026
on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2027
retval = _pam_get_item(ctx->pamh, authtok_flag, &item);
2028
if (retval != PAM_SUCCESS) {
2030
_pam_log(ctx, LOG_ALERT,
2031
"pam_get_item returned error "
2032
"to unix-read-password");
2034
} else if (item != NULL) { /* we have a password! */
2037
_pam_log(ctx, LOG_DEBUG,
2038
"pam_get_item returned a password");
2040
} else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2041
return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
2042
} else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
2043
&& off(WINBIND__OLD_PASSWORD, ctrl)) {
2044
return PAM_AUTHTOK_RECOVER_ERR;
2048
* getting here implies we will have to get the password from the
2053
struct pam_message msg[3], *pmsg[3];
2054
struct pam_response *resp;
2057
/* prepare to converse */
2059
if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
2061
msg[0].msg_style = PAM_TEXT_INFO;
2062
msg[0].msg = discard_const_p(char, comment);
2069
msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2070
msg[i++].msg = discard_const_p(char, prompt1);
2073
if (prompt2 != NULL) {
2075
msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2076
msg[i++].msg = discard_const_p(char, prompt2);
2079
/* so call the conversation expecting i responses */
2081
retval = converse(ctx->pamh, i, pmsg, &resp);
2083
if (retval == PAM_SUCCESS) {
2084
retval = PAM_AUTHTOK_RECOVER_ERR;
2088
if (retval != PAM_SUCCESS) {
2089
_pam_drop_reply(resp, i);
2093
/* interpret the response */
2095
token = x_strdup(resp[i - replies].resp);
2097
_pam_log(ctx, LOG_NOTICE,
2098
"could not recover "
2099
"authentication token");
2100
retval = PAM_AUTHTOK_RECOVER_ERR;
2105
/* verify that password entered correctly */
2106
if (!resp[i - 1].resp ||
2107
strcmp(token, resp[i - 1].resp)) {
2108
_pam_delete(token); /* mistyped */
2109
retval = PAM_AUTHTOK_RECOVER_ERR;
2110
_make_remark(ctx, PAM_ERROR_MSG,
2116
* tidy up the conversation (resp_retcode) is ignored
2117
* -- what is it for anyway? AGM
2119
_pam_drop_reply(resp, i);
2123
if (retval != PAM_SUCCESS) {
2124
_pam_log_debug(ctx, LOG_DEBUG,
2125
"unable to obtain a password");
2128
/* 'token' is the entered password */
2130
/* we store this password as an item */
2132
retval = pam_set_item(ctx->pamh, authtok_flag, token);
2133
_pam_delete(token); /* clean it up */
2134
if (retval != PAM_SUCCESS ||
2135
(retval = _pam_get_item(ctx->pamh, authtok_flag, &item)) != PAM_SUCCESS) {
2137
_pam_log(ctx, LOG_CRIT, "error manipulating password");
2143
item = NULL; /* break link to password */
2148
static const char *get_conf_item_string(struct pwb_context *ctx,
2153
const char *parm_opt = NULL;
2155
if (!(ctx->ctrl & config_flag)) {
2159
/* let the pam opt take precedence over the pam_winbind.conf option */
2160
for (i=0; i<ctx->argc; i++) {
2162
if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2165
if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2166
_pam_log(ctx, LOG_INFO,
2167
"no \"=\" delimiter for \"%s\" found\n",
2171
_pam_log_debug(ctx, LOG_INFO,
2172
"PAM config: %s '%s'\n", item, p+1);
2180
key = talloc_asprintf(ctx, "global:%s", item);
2185
parm_opt = iniparser_getstr(ctx->dict, key);
2188
_pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
2195
static int get_config_item_int(struct pwb_context *ctx,
2199
int i, parm_opt = -1;
2201
if (!(ctx->ctrl & config_flag)) {
2205
/* let the pam opt take precedence over the pam_winbind.conf option */
2206
for (i = 0; i < ctx->argc; i++) {
2208
if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2211
if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2212
_pam_log(ctx, LOG_INFO,
2213
"no \"=\" delimiter for \"%s\" found\n",
2217
parm_opt = atoi(p + 1);
2218
_pam_log_debug(ctx, LOG_INFO,
2219
"PAM config: %s '%d'\n",
2228
key = talloc_asprintf(ctx, "global:%s", item);
2233
parm_opt = iniparser_getint(ctx->dict, key, -1);
2236
_pam_log_debug(ctx, LOG_INFO,
2237
"CONFIG file: %s '%d'\n",
2244
static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
2246
return get_conf_item_string(ctx, "krb5_ccache_type",
2247
WINBIND_KRB5_CCACHE_TYPE);
2250
static const char *get_member_from_config(struct pwb_context *ctx)
2252
const char *ret = NULL;
2253
ret = get_conf_item_string(ctx, "require_membership_of",
2254
WINBIND_REQUIRED_MEMBERSHIP);
2258
return get_conf_item_string(ctx, "require-membership-of",
2259
WINBIND_REQUIRED_MEMBERSHIP);
2262
static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
2265
ret = get_config_item_int(ctx, "warn_pwd_expire",
2266
WINBIND_WARN_PWD_EXPIRE);
2267
/* no or broken setting */
2269
return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
2275
* Retrieve the winbind separator.
2277
* @param ctx PAM winbind context.
2279
* @return string separator character. NULL on failure.
2282
static char winbind_get_separator(struct pwb_context *ctx)
2285
static struct wbcInterfaceDetails *details = NULL;
2287
wbc_status = wbcInterfaceDetails(&details);
2288
if (!WBC_ERROR_IS_OK(wbc_status)) {
2289
_pam_log(ctx, LOG_ERR,
2290
"Could not retrieve winbind interface details: %s",
2291
wbcErrorString(wbc_status));
2299
return details->winbind_separator;
2304
* Convert a upn to a name.
2306
* @param ctx PAM winbind context.
2307
* @param upn USer UPN to be trabslated.
2309
* @return converted name. NULL pointer on failure. Caller needs to free.
2312
static char* winbind_upn_to_username(struct pwb_context *ctx,
2316
wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
2317
struct wbcDomainSid sid;
2318
enum wbcSidType type;
2323
/* This cannot work when the winbind separator = @ */
2325
sep = winbind_get_separator(ctx);
2326
if (!sep || sep == '@') {
2330
name = talloc_strdup(ctx, upn);
2335
if ((p = strchr(name, '@')) != NULL) {
2340
/* Convert the UPN to a SID */
2342
wbc_status = wbcLookupName(domain, name, &sid, &type);
2343
if (!WBC_ERROR_IS_OK(wbc_status)) {
2347
/* Convert the the SID back to the sAMAccountName */
2349
wbc_status = wbcLookupSid(&sid, &domain, &name, &type);
2350
if (!WBC_ERROR_IS_OK(wbc_status)) {
2354
return talloc_asprintf(ctx, "%s\\%s", domain, name);
2357
static int _pam_delete_cred(pam_handle_t *pamh, int flags,
2358
int argc, const char **argv)
2360
int retval = PAM_SUCCESS;
2361
struct pwb_context *ctx = NULL;
2362
struct wbcLogoffUserParams logoff;
2363
struct wbcAuthErrorInfo *error = NULL;
2365
wbcErr wbc_status = WBC_ERR_SUCCESS;
2367
ZERO_STRUCT(logoff);
2369
retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2374
_PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
2376
if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2378
/* destroy the ccache here */
2380
uint32_t wbc_flags = 0;
2381
const char *ccname = NULL;
2382
struct passwd *pwd = NULL;
2384
retval = pam_get_user(pamh, &user, _("Username: "));
2386
_pam_log(ctx, LOG_ERR,
2387
"could not identify user");
2392
_pam_log(ctx, LOG_ERR,
2393
"username was NULL!");
2394
retval = PAM_USER_UNKNOWN;
2398
_pam_log_debug(ctx, LOG_DEBUG,
2399
"username [%s] obtained", user);
2401
ccname = pam_getenv(pamh, "KRB5CCNAME");
2402
if (ccname == NULL) {
2403
_pam_log_debug(ctx, LOG_DEBUG,
2404
"user has no KRB5CCNAME environment");
2407
pwd = getpwnam(user);
2409
retval = PAM_USER_UNKNOWN;
2413
wbc_flags = WBFLAG_PAM_KRB5 |
2414
WBFLAG_PAM_CONTACT_TRUSTDOM;
2416
logoff.username = user;
2419
wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2425
if (!WBC_ERROR_IS_OK(wbc_status)) {
2430
wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2434
(uint8_t *)&wbc_flags,
2436
if (!WBC_ERROR_IS_OK(wbc_status)) {
2440
wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2444
(uint8_t *)&pwd->pw_uid,
2445
sizeof(pwd->pw_uid));
2446
if (!WBC_ERROR_IS_OK(wbc_status)) {
2450
wbc_status = wbcLogoffUserEx(&logoff, &error);
2451
retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2452
user, "wbcLogoffUser");
2453
wbcFreeMemory(error);
2454
wbcFreeMemory(logoff.blobs);
2455
logoff.blobs = NULL;
2457
if (!WBC_ERROR_IS_OK(wbc_status)) {
2458
_pam_log(ctx, LOG_INFO,
2459
"failed to logoff user %s: %s\n",
2460
user, wbcErrorString(wbc_status));
2466
wbcFreeMemory(logoff.blobs);
2469
if (!WBC_ERROR_IS_OK(wbc_status)) {
2470
retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2471
user, "wbcLogoffUser");
2475
* Delete the krb5 ccname variable from the PAM environment
2476
* if it was set by winbind.
2478
if ((ctx->ctrl & WINBIND_KRB5_AUTH) && pam_getenv(pamh, "KRB5CCNAME")) {
2479
pam_putenv(pamh, "KRB5CCNAME");
2482
_PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx, retval);
2490
int pam_sm_authenticate(pam_handle_t *pamh, int flags,
2491
int argc, const char **argv)
2493
const char *username;
2494
const char *password;
2495
const char *member = NULL;
2496
const char *cctype = NULL;
2497
int warn_pwd_expire;
2498
int retval = PAM_AUTH_ERR;
2499
char *username_ret = NULL;
2500
char *new_authtok_required = NULL;
2501
char *real_username = NULL;
2502
struct pwb_context *ctx = NULL;
2504
retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2509
_PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
2511
/* Get the username */
2512
retval = pam_get_user(pamh, &username, NULL);
2513
if ((retval != PAM_SUCCESS) || (!username)) {
2514
_pam_log_debug(ctx, LOG_DEBUG,
2515
"can not get the username");
2516
retval = PAM_SERVICE_ERR;
2522
/* Decode the user name since AIX does not support logn user
2523
names by default. The name is encoded as _#uid. */
2525
if (username[0] == '_') {
2526
uid_t id = atoi(&username[1]);
2527
struct passwd *pw = NULL;
2529
if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
2530
real_username = strdup(pw->pw_name);
2535
if (!real_username) {
2536
/* Just making a copy of the username we got from PAM */
2537
if ((real_username = strdup(username)) == NULL) {
2538
_pam_log_debug(ctx, LOG_DEBUG,
2539
"memory allocation failure when copying "
2541
retval = PAM_SERVICE_ERR;
2546
/* Maybe this was a UPN */
2548
if (strchr(real_username, '@') != NULL) {
2549
char *samaccountname = NULL;
2551
samaccountname = winbind_upn_to_username(ctx,
2553
if (samaccountname) {
2554
free(real_username);
2555
real_username = strdup(samaccountname);
2559
retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
2560
_("Password: "), NULL,
2563
if (retval != PAM_SUCCESS) {
2564
_pam_log(ctx, LOG_ERR,
2565
"Could not retrieve user's password");
2566
retval = PAM_AUTHTOK_ERR;
2570
/* Let's not give too much away in the log file */
2572
#ifdef DEBUG_PASSWORD
2573
_pam_log_debug(ctx, LOG_INFO,
2574
"Verify user '%s' with password '%s'",
2575
real_username, password);
2577
_pam_log_debug(ctx, LOG_INFO,
2578
"Verify user '%s'", real_username);
2581
member = get_member_from_config(ctx);
2582
cctype = get_krb5_cc_type_from_config(ctx);
2583
warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2585
/* Now use the username to look up password */
2586
retval = winbind_auth_request(ctx, real_username, password,
2587
member, cctype, warn_pwd_expire,
2589
NULL, &username_ret);
2591
if (retval == PAM_NEW_AUTHTOK_REQD ||
2592
retval == PAM_AUTHTOK_EXPIRED) {
2594
char *new_authtok_required_during_auth = NULL;
2596
new_authtok_required = talloc_asprintf(NULL, "%d", retval);
2597
if (!new_authtok_required) {
2598
retval = PAM_BUF_ERR;
2602
pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2603
new_authtok_required,
2604
_pam_winbind_cleanup_func);
2606
retval = PAM_SUCCESS;
2608
new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
2609
if (!new_authtok_required_during_auth) {
2610
retval = PAM_BUF_ERR;
2614
pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2615
new_authtok_required_during_auth,
2616
_pam_winbind_cleanup_func);
2623
pam_set_item (pamh, PAM_USER, username_ret);
2624
_pam_log_debug(ctx, LOG_INFO,
2625
"Returned user was '%s'", username_ret);
2629
if (real_username) {
2630
free(real_username);
2633
if (!new_authtok_required) {
2634
pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2637
if (retval != PAM_SUCCESS) {
2638
_pam_free_data_info3(pamh);
2641
_PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
2649
int pam_sm_setcred(pam_handle_t *pamh, int flags,
2650
int argc, const char **argv)
2652
int ret = PAM_SYSTEM_ERR;
2653
struct pwb_context *ctx = NULL;
2655
ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2660
_PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
2662
switch (flags & ~PAM_SILENT) {
2664
case PAM_DELETE_CRED:
2665
ret = _pam_delete_cred(pamh, flags, argc, argv);
2667
case PAM_REFRESH_CRED:
2668
_pam_log_debug(ctx, LOG_WARNING,
2669
"PAM_REFRESH_CRED not implemented");
2672
case PAM_REINITIALIZE_CRED:
2673
_pam_log_debug(ctx, LOG_WARNING,
2674
"PAM_REINITIALIZE_CRED not implemented");
2677
case PAM_ESTABLISH_CRED:
2678
_pam_log_debug(ctx, LOG_WARNING,
2679
"PAM_ESTABLISH_CRED not implemented");
2683
ret = PAM_SYSTEM_ERR;
2689
_PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
2697
* Account management. We want to verify that the account exists
2698
* before returning PAM_SUCCESS
2701
int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2702
int argc, const char **argv)
2704
const char *username;
2705
int ret = PAM_USER_UNKNOWN;
2707
struct pwb_context *ctx = NULL;
2709
ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2714
_PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
2717
/* Get the username */
2718
ret = pam_get_user(pamh, &username, NULL);
2719
if ((ret != PAM_SUCCESS) || (!username)) {
2720
_pam_log_debug(ctx, LOG_DEBUG,
2721
"can not get the username");
2722
ret = PAM_SERVICE_ERR;
2726
/* Verify the username */
2727
ret = valid_user(ctx, username);
2730
/* some sort of system error. The log was already printed */
2731
ret = PAM_SERVICE_ERR;
2734
/* the user does not exist */
2735
_pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
2737
if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
2741
ret = PAM_USER_UNKNOWN;
2744
pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2745
(const void **)&tmp);
2747
ret = atoi((const char *)tmp);
2749
case PAM_AUTHTOK_EXPIRED:
2750
/* fall through, since new token is required in this case */
2751
case PAM_NEW_AUTHTOK_REQD:
2752
_pam_log(ctx, LOG_WARNING,
2753
"pam_sm_acct_mgmt success but %s is set",
2754
PAM_WINBIND_NEW_AUTHTOK_REQD);
2755
_pam_log(ctx, LOG_NOTICE,
2756
"user '%s' needs new password",
2758
/* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2759
ret = PAM_NEW_AUTHTOK_REQD;
2762
_pam_log(ctx, LOG_WARNING,
2763
"pam_sm_acct_mgmt success");
2764
_pam_log(ctx, LOG_NOTICE,
2765
"user '%s' granted access", username);
2771
/* Otherwise, the authentication looked good */
2772
_pam_log(ctx, LOG_NOTICE,
2773
"user '%s' granted access", username);
2777
/* we don't know anything about this return value */
2778
_pam_log(ctx, LOG_ERR,
2779
"internal module error (ret = %d, user = '%s')",
2781
ret = PAM_SERVICE_ERR;
2785
/* should not be reached */
2790
_PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
2798
int pam_sm_open_session(pam_handle_t *pamh, int flags,
2799
int argc, const char **argv)
2801
int ret = PAM_SUCCESS;
2802
struct pwb_context *ctx = NULL;
2804
ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2809
_PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
2811
if (ctx->ctrl & WINBIND_MKHOMEDIR) {
2812
/* check and create homedir */
2813
ret = _pam_mkhomedir(ctx);
2816
_PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
2824
int pam_sm_close_session(pam_handle_t *pamh, int flags,
2825
int argc, const char **argv)
2827
int ret = PAM_SUCCESS;
2828
struct pwb_context *ctx = NULL;
2830
ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2835
_PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
2838
_PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
2846
* evaluate whether we need to re-authenticate with kerberos after a
2849
* @param ctx PAM winbind context.
2850
* @param user The username
2852
* @return boolean Returns true if required, false if not.
2855
static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
2859
/* Make sure that we only do this if a) the chauthtok got initiated
2860
* during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2861
* later password change via the "passwd" command if done by the user
2863
* NB. If we login from gdm or xdm and the password expires,
2864
* we change the password, but there is no memory cache.
2865
* Thus, even for passthrough login, we should do the
2866
* authentication again to update memory cache.
2870
char *new_authtok_reqd_during_auth = NULL;
2871
struct passwd *pwd = NULL;
2873
_pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2874
&new_authtok_reqd_during_auth);
2875
pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2878
if (new_authtok_reqd_during_auth) {
2882
pwd = getpwnam(user);
2887
if (getuid() == pwd->pw_uid) {
2896
int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
2897
int argc, const char **argv)
2901
bool cached_login = false;
2903
/* <DO NOT free() THESE> */
2905
char *pass_old, *pass_new;
2906
/* </DO NOT free() THESE> */
2911
char *username_ret = NULL;
2912
struct wbcAuthErrorInfo *error = NULL;
2913
struct pwb_context *ctx = NULL;
2915
ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
2920
_PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
2922
cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
2924
/* clearing offline bit for auth */
2925
ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
2928
* First get the name of a user
2930
ret = pam_get_user(pamh, &user, _("Username: "));
2932
_pam_log(ctx, LOG_ERR,
2933
"password - could not identify user");
2938
_pam_log(ctx, LOG_ERR, "username was NULL!");
2939
ret = PAM_USER_UNKNOWN;
2943
_pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
2945
/* check if this is really a user in winbindd, not only in NSS */
2946
ret = valid_user(ctx, user);
2949
ret = PAM_USER_UNKNOWN;
2952
ret = PAM_SYSTEM_ERR;
2959
* obtain and verify the current password (OLDAUTHTOK) for
2963
if (flags & PAM_PRELIM_CHECK) {
2964
time_t pwdlastset_prelim = 0;
2966
/* instruct user what is happening */
2968
#define greeting _("Changing password for")
2969
Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
2971
_pam_log(ctx, LOG_CRIT,
2972
"password - out of memory");
2978
lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
2979
ret = _winbind_read_password(ctx, lctrl,
2981
_("(current) NT password: "),
2983
(const char **) &pass_old);
2984
TALLOC_FREE(Announce);
2985
if (ret != PAM_SUCCESS) {
2986
_pam_log(ctx, LOG_NOTICE,
2987
"password - (old) token not obtained");
2991
/* verify that this is the password for this user */
2993
ret = winbind_auth_request(ctx, user, pass_old,
2996
&pwdlastset_prelim, NULL);
2998
if (ret != PAM_ACCT_EXPIRED &&
2999
ret != PAM_AUTHTOK_EXPIRED &&
3000
ret != PAM_NEW_AUTHTOK_REQD &&
3001
ret != PAM_SUCCESS) {
3006
pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3007
(void *)pwdlastset_prelim, NULL);
3009
ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
3010
(const void *) pass_old);
3012
if (ret != PAM_SUCCESS) {
3013
_pam_log(ctx, LOG_CRIT,
3014
"failed to set PAM_OLDAUTHTOK");
3016
} else if (flags & PAM_UPDATE_AUTHTOK) {
3018
time_t pwdlastset_update = 0;
3021
* obtain the proposed password
3025
* get the old token back.
3028
ret = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
3030
if (ret != PAM_SUCCESS) {
3031
_pam_log(ctx, LOG_NOTICE,
3032
"user not authenticated");
3036
lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
3038
if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
3039
lctrl |= WINBIND_USE_FIRST_PASS_ARG;
3042
ret = PAM_AUTHTOK_ERR;
3043
while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
3045
* use_authtok is to force the use of a previously entered
3046
* password -- needed for pluggable password strength checking
3049
ret = _winbind_read_password(ctx, lctrl,
3051
_("Enter new NT password: "),
3052
_("Retype new NT password: "),
3053
(const char **)&pass_new);
3055
if (ret != PAM_SUCCESS) {
3056
_pam_log_debug(ctx, LOG_ALERT,
3058
"new password not obtained");
3059
pass_old = NULL;/* tidy up */
3064
* At this point we know who the user is and what they
3065
* propose as their new password. Verify that the new
3066
* password is acceptable.
3069
if (pass_new[0] == '\0') {/* "\0" password = NULL */
3075
* By reaching here we have approved the passwords and must now
3076
* rebuild the password database file.
3078
_pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3079
&pwdlastset_update);
3082
* if cached creds were enabled, make sure to set the
3083
* WINBIND_CACHED_LOGIN bit here in order to have winbindd
3084
* update the cached creds storage - gd
3087
ctx->ctrl |= WINBIND_CACHED_LOGIN;
3090
ret = winbind_chauthtok_request(ctx, user, pass_old,
3091
pass_new, pwdlastset_update);
3093
pass_old = pass_new = NULL;
3097
if (_pam_require_krb5_auth_after_chauthtok(ctx, user)) {
3099
const char *member = NULL;
3100
const char *cctype = NULL;
3101
int warn_pwd_expire;
3102
struct wbcLogonUserInfo *info = NULL;
3103
struct wbcUserPasswordPolicyInfo *policy = NULL;
3105
member = get_member_from_config(ctx);
3106
cctype = get_krb5_cc_type_from_config(ctx);
3107
warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
3109
/* Keep WINBIND_CACHED_LOGIN bit for
3110
* authentication after changing the password.
3111
* This will update the cached credentials in case
3112
* that winbindd_dual_pam_chauthtok() fails
3117
ret = winbind_auth_request(ctx, user, pass_new,
3119
&error, &info, &policy,
3120
NULL, &username_ret);
3121
pass_old = pass_new = NULL;
3123
if (ret == PAM_SUCCESS) {
3125
struct wbcAuthUserInfo *user_info = NULL;
3127
if (info && info->info) {
3128
user_info = info->info;
3131
/* warn a user if the password is about to
3133
_pam_warn_password_expiry(ctx, user_info, policy,
3137
/* set some info3 info for other modules in the
3139
_pam_set_data_info3(ctx, user_info);
3141
/* put krb5ccname into env */
3142
_pam_setup_krb5_env(ctx, info);
3145
pam_set_item(pamh, PAM_USER,
3147
_pam_log_debug(ctx, LOG_INFO,
3148
"Returned user was '%s'",
3155
if (info && info->blobs) {
3156
wbcFreeMemory(info->blobs);
3158
wbcFreeMemory(info);
3159
wbcFreeMemory(policy);
3164
ret = PAM_SERVICE_ERR;
3169
/* Deal with offline errors. */
3171
const char *codes[] = {
3172
"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3173
"NT_STATUS_NO_LOGON_SERVERS",
3174
"NT_STATUS_ACCESS_DENIED"
3177
for (i=0; i<ARRAY_SIZE(codes); i++) {
3179
if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
3185
wbcFreeMemory(error);
3187
_PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
3196
/* static module data */
3198
struct pam_module _pam_winbind_modstruct = {
3200
pam_sm_authenticate,
3203
pam_sm_open_session,
3204
pam_sm_close_session,
3211
* Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3212
* Copyright (c) Tim Potter <tpot@samba.org> 2000
3213
* Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3214
* Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3215
* Copyright (c) Jan Rêkorajski 1999.
3216
* Copyright (c) Andrew G. Morgan 1996-8.
3217
* Copyright (c) Alex O. Yuriev, 1996.
3218
* Copyright (c) Cristian Gafton 1996.
3219
* Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3221
* Redistribution and use in source and binary forms, with or without
3222
* modification, are permitted provided that the following conditions
3224
* 1. Redistributions of source code must retain the above copyright
3225
* notice, and the entire permission notice in its entirety,
3226
* including the disclaimer of warranties.
3227
* 2. Redistributions in binary form must reproduce the above copyright
3228
* notice, this list of conditions and the following disclaimer in the
3229
* documentation and/or other materials provided with the distribution.
3230
* 3. The name of the author may not be used to endorse or promote
3231
* products derived from this software without specific prior
3232
* written permission.
3234
* ALTERNATIVELY, this product may be distributed under the terms of
3235
* the GNU Public License, in which case the provisions of the GPL are
3236
* required INSTEAD OF the above restrictions. (This clause is
3237
* necessary due to a potential bad interaction between the GPL and
3238
* the restrictions contained in a BSD-style copyright.)
3240
* THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3241
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3242
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3243
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3244
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3245
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3246
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3247
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3248
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3249
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3250
* OF THE POSSIBILITY OF SUCH DAMAGE.
added
removed
nsswitch/pam_winbind.c
