Line data Source code
1 : /* pam_winbind module
2 :
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
7 :
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)
11 : */
12 :
13 : #include "pam_winbind.h"
14 :
15 : enum pam_winbind_request_type
16 : {
17 : PAM_WINBIND_AUTHENTICATE,
18 : PAM_WINBIND_SETCRED,
19 : PAM_WINBIND_ACCT_MGMT,
20 : PAM_WINBIND_OPEN_SESSION,
21 : PAM_WINBIND_CLOSE_SESSION,
22 : PAM_WINBIND_CHAUTHTOK,
23 : PAM_WINBIND_CLEANUP
24 : };
25 :
26 0 : static int wbc_error_to_pam_error(wbcErr status)
27 : {
28 0 : switch (status) {
29 0 : case WBC_ERR_SUCCESS:
30 0 : return PAM_SUCCESS;
31 0 : case WBC_ERR_NOT_IMPLEMENTED:
32 0 : return PAM_SERVICE_ERR;
33 0 : case WBC_ERR_UNKNOWN_FAILURE:
34 0 : break;
35 0 : case WBC_ERR_NO_MEMORY:
36 0 : return PAM_BUF_ERR;
37 0 : case WBC_ERR_INVALID_SID:
38 : case WBC_ERR_INVALID_PARAM:
39 0 : break;
40 0 : case WBC_ERR_WINBIND_NOT_AVAILABLE:
41 0 : return PAM_AUTHINFO_UNAVAIL;
42 0 : case WBC_ERR_DOMAIN_NOT_FOUND:
43 0 : return PAM_AUTHINFO_UNAVAIL;
44 0 : case WBC_ERR_INVALID_RESPONSE:
45 0 : return PAM_BUF_ERR;
46 0 : case WBC_ERR_NSS_ERROR:
47 0 : return PAM_USER_UNKNOWN;
48 0 : case WBC_ERR_AUTH_ERROR:
49 0 : return PAM_AUTH_ERR;
50 0 : case WBC_ERR_UNKNOWN_USER:
51 0 : return PAM_USER_UNKNOWN;
52 0 : case WBC_ERR_UNKNOWN_GROUP:
53 0 : return PAM_USER_UNKNOWN;
54 0 : case WBC_ERR_PWD_CHANGE_FAILED:
55 0 : break;
56 : }
57 :
58 : /* be paranoid */
59 0 : return PAM_AUTH_ERR;
60 : }
61 :
62 336 : static const char *_pam_error_code_str(int err)
63 : {
64 336 : switch (err) {
65 184 : case PAM_SUCCESS:
66 184 : return "PAM_SUCCESS";
67 0 : case PAM_OPEN_ERR:
68 0 : return "PAM_OPEN_ERR";
69 0 : case PAM_SYMBOL_ERR:
70 0 : return "PAM_SYMBOL_ERR";
71 0 : case PAM_SERVICE_ERR:
72 0 : return "PAM_SERVICE_ERR";
73 0 : case PAM_SYSTEM_ERR:
74 0 : return "PAM_SYSTEM_ERR";
75 0 : case PAM_BUF_ERR:
76 0 : return "PAM_BUF_ERR";
77 0 : case PAM_PERM_DENIED:
78 0 : return "PAM_PERM_DENIED";
79 152 : case PAM_AUTH_ERR:
80 152 : return "PAM_AUTH_ERR";
81 0 : case PAM_CRED_INSUFFICIENT:
82 0 : return "PAM_CRED_INSUFFICIENT";
83 0 : case PAM_AUTHINFO_UNAVAIL:
84 0 : return "PAM_AUTHINFO_UNAVAIL";
85 0 : case PAM_USER_UNKNOWN:
86 0 : return "PAM_USER_UNKNOWN";
87 0 : case PAM_MAXTRIES:
88 0 : return "PAM_MAXTRIES";
89 0 : case PAM_NEW_AUTHTOK_REQD:
90 0 : return "PAM_NEW_AUTHTOK_REQD";
91 0 : case PAM_ACCT_EXPIRED:
92 0 : return "PAM_ACCT_EXPIRED";
93 0 : case PAM_SESSION_ERR:
94 0 : return "PAM_SESSION_ERR";
95 0 : case PAM_CRED_UNAVAIL:
96 0 : return "PAM_CRED_UNAVAIL";
97 0 : case PAM_CRED_EXPIRED:
98 0 : return "PAM_CRED_EXPIRED";
99 0 : case PAM_CRED_ERR:
100 0 : return "PAM_CRED_ERR";
101 0 : case PAM_NO_MODULE_DATA:
102 0 : return "PAM_NO_MODULE_DATA";
103 0 : case PAM_CONV_ERR:
104 0 : return "PAM_CONV_ERR";
105 0 : case PAM_AUTHTOK_ERR:
106 0 : return "PAM_AUTHTOK_ERR";
107 0 : case PAM_AUTHTOK_RECOVER_ERR:
108 0 : return "PAM_AUTHTOK_RECOVER_ERR";
109 0 : case PAM_AUTHTOK_LOCK_BUSY:
110 0 : return "PAM_AUTHTOK_LOCK_BUSY";
111 0 : case PAM_AUTHTOK_DISABLE_AGING:
112 0 : return "PAM_AUTHTOK_DISABLE_AGING";
113 0 : case PAM_TRY_AGAIN:
114 0 : return "PAM_TRY_AGAIN";
115 0 : case PAM_IGNORE:
116 0 : return "PAM_IGNORE";
117 0 : case PAM_ABORT:
118 0 : return "PAM_ABORT";
119 0 : case PAM_AUTHTOK_EXPIRED:
120 0 : return "PAM_AUTHTOK_EXPIRED";
121 : #ifdef PAM_MODULE_UNKNOWN
122 0 : case PAM_MODULE_UNKNOWN:
123 0 : return "PAM_MODULE_UNKNOWN";
124 : #endif
125 : #ifdef PAM_BAD_ITEM
126 0 : case PAM_BAD_ITEM:
127 0 : return "PAM_BAD_ITEM";
128 : #endif
129 : #ifdef PAM_CONV_AGAIN
130 0 : case PAM_CONV_AGAIN:
131 0 : return "PAM_CONV_AGAIN";
132 : #endif
133 : #ifdef PAM_INCOMPLETE
134 0 : case PAM_INCOMPLETE:
135 0 : return "PAM_INCOMPLETE";
136 : #endif
137 0 : default:
138 0 : return NULL;
139 : }
140 : }
141 :
142 : #define _PAM_LOG_FUNCTION_ENTER(function, ctx) \
143 : do { \
144 : _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] ENTER: " \
145 : function " (flags: 0x%04x)", ctx->pamh, ctx->flags); \
146 : _pam_log_state(ctx); \
147 : } while (0)
148 :
149 : #define _PAM_LOG_FUNCTION_LEAVE(function, ctx, retval) \
150 : do { \
151 : _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] LEAVE: " \
152 : function " returning %d (%s)", ctx ? ctx->pamh : NULL, retval, \
153 : _pam_error_code_str(retval)); \
154 : _pam_log_state(ctx); \
155 : } while (0)
156 :
157 : /* data tokens */
158 :
159 : #define MAX_PASSWD_TRIES 3
160 :
161 : #ifdef HAVE_GETTEXT
162 : static char initialized = 0;
163 :
164 : static inline void textdomain_init(void);
165 260 : static inline void textdomain_init(void)
166 : {
167 260 : if (!initialized) {
168 248 : bindtextdomain(MODULE_NAME, LOCALEDIR);
169 248 : initialized = 1;
170 : }
171 260 : return;
172 : }
173 : #endif
174 :
175 :
176 : /* some syslogging */
177 : static void _pam_log_int(const pam_handle_t *pamh,
178 : int err,
179 : const char *format,
180 : va_list args) PRINTF_ATTRIBUTE(3, 0);
181 :
182 : #ifdef HAVE_PAM_VSYSLOG
183 4280 : static void _pam_log_int(const pam_handle_t *pamh,
184 : int err,
185 : const char *format,
186 : va_list args)
187 : {
188 4280 : pam_vsyslog(pamh, err, format, args);
189 4280 : }
190 : #else
191 : static void _pam_log_int(const pam_handle_t *pamh,
192 : int err,
193 : const char *format,
194 : va_list args)
195 : {
196 : char *base = NULL;
197 : va_list args2;
198 : const char *service;
199 : int ret;
200 :
201 : va_copy(args2, args);
202 :
203 : pam_get_item(pamh, PAM_SERVICE, (const void **) &service);
204 :
205 : ret = vasprintf(&base, format, args);
206 : if (ret == -1) {
207 : /* what else todo ? */
208 : vsyslog(err, format, args2);
209 : va_end(args2);
210 : return;
211 : }
212 :
213 : syslog(err, "%s(%s): %s", MODULE_NAME, service, base);
214 : SAFE_FREE(base);
215 : va_end(args2);
216 : }
217 : #endif /* HAVE_PAM_VSYSLOG */
218 :
219 4800 : static bool _pam_log_is_silent(int ctrl)
220 : {
221 4800 : return on(ctrl, WINBIND_SILENT);
222 : }
223 :
224 : static void _pam_log(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
225 620 : static void _pam_log(struct pwb_context *r, int err, const char *format, ...)
226 : {
227 : va_list args;
228 :
229 620 : if (_pam_log_is_silent(r->ctrl)) {
230 0 : return;
231 : }
232 :
233 620 : va_start(args, format);
234 620 : _pam_log_int(r->pamh, err, format, args);
235 620 : va_end(args);
236 : }
237 : static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
238 0 : static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
239 : {
240 : va_list args;
241 :
242 0 : if (_pam_log_is_silent(ctrl)) {
243 0 : return;
244 : }
245 :
246 0 : va_start(args, format);
247 0 : _pam_log_int(pamh, err, format, args);
248 0 : va_end(args);
249 : }
250 :
251 4180 : static bool _pam_log_is_debug_enabled(int ctrl)
252 : {
253 4180 : if (ctrl == -1) {
254 0 : return false;
255 : }
256 :
257 4180 : if (_pam_log_is_silent(ctrl)) {
258 0 : return false;
259 : }
260 :
261 4180 : if (!(ctrl & WINBIND_DEBUG_ARG)) {
262 0 : return false;
263 : }
264 :
265 4180 : return true;
266 : }
267 :
268 708 : static bool _pam_log_is_debug_state_enabled(int ctrl)
269 : {
270 708 : if (!(ctrl & WINBIND_DEBUG_STATE)) {
271 188 : return false;
272 : }
273 :
274 520 : return _pam_log_is_debug_enabled(ctrl);
275 : }
276 :
277 : static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
278 3660 : static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...)
279 : {
280 : va_list args;
281 :
282 3660 : if (!r || !_pam_log_is_debug_enabled(r->ctrl)) {
283 0 : return;
284 : }
285 :
286 3660 : va_start(args, format);
287 3660 : _pam_log_int(r->pamh, err, format, args);
288 3660 : va_end(args);
289 : }
290 : static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
291 0 : static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
292 : {
293 : va_list args;
294 :
295 0 : if (!_pam_log_is_debug_enabled(ctrl)) {
296 0 : return;
297 : }
298 :
299 0 : va_start(args, format);
300 0 : _pam_log_int(pamh, err, format, args);
301 0 : va_end(args);
302 : }
303 :
304 8840 : static void _pam_log_state_datum(struct pwb_context *ctx,
305 : int item_type,
306 : const char *key,
307 : int is_string)
308 : {
309 8840 : const void *data = NULL;
310 8840 : if (item_type != 0) {
311 5200 : pam_get_item(ctx->pamh, item_type, &data);
312 : } else {
313 3640 : pam_get_data(ctx->pamh, key, &data);
314 : }
315 8840 : if (data != NULL) {
316 2116 : const char *type = (item_type != 0) ? "ITEM" : "DATA";
317 2116 : if (is_string != 0) {
318 1560 : _pam_log_debug(ctx, LOG_DEBUG,
319 : "[pamh: %p] STATE: %s(%s) = \"%s\" (%p)",
320 : ctx->pamh, type, key, (const char *)data,
321 : data);
322 : } else {
323 556 : _pam_log_debug(ctx, LOG_DEBUG,
324 : "[pamh: %p] STATE: %s(%s) = %p",
325 : ctx->pamh, type, key, data);
326 : }
327 : }
328 8840 : }
329 :
330 : #define _PAM_LOG_STATE_DATA_POINTER(ctx, module_data_name) \
331 : _pam_log_state_datum(ctx, 0, module_data_name, 0)
332 :
333 : #define _PAM_LOG_STATE_DATA_STRING(ctx, module_data_name) \
334 : _pam_log_state_datum(ctx, 0, module_data_name, 1)
335 :
336 : #define _PAM_LOG_STATE_ITEM_POINTER(ctx, item_type) \
337 : _pam_log_state_datum(ctx, item_type, #item_type, 0)
338 :
339 : #define _PAM_LOG_STATE_ITEM_STRING(ctx, item_type) \
340 : _pam_log_state_datum(ctx, item_type, #item_type, 1)
341 :
342 : #ifdef DEBUG_PASSWORD
343 : #define _LOG_PASSWORD_AS_STRING 1
344 : #else
345 : #define _LOG_PASSWORD_AS_STRING 0
346 : #endif
347 :
348 : #define _PAM_LOG_STATE_ITEM_PASSWORD(ctx, item_type) \
349 : _pam_log_state_datum(ctx, item_type, #item_type, \
350 : _LOG_PASSWORD_AS_STRING)
351 : /*
352 : * wrapper to preserve old behaviour of iniparser which ignored
353 : * key values that had no value assigned like
354 : * key =
355 : * for a key like above newer iniparser will return a zero-length
356 : * string, previously iniparser would return NULL
357 : *
358 : * JRA: For compatibility, tiniparser behaves like iniparser.
359 : */
360 0 : static const char *tiniparser_getstring_nonempty(struct tiniparser_dictionary *d,
361 : const char *key,
362 : const char *def)
363 : {
364 0 : const char *ret = tiniparser_getstring(d, key, def);
365 0 : if (ret && strlen(ret) == 0) {
366 0 : ret = NULL;
367 : }
368 0 : return ret;
369 : }
370 :
371 520 : static void _pam_log_state(struct pwb_context *ctx)
372 : {
373 520 : if (!ctx || !_pam_log_is_debug_state_enabled(ctx->ctrl)) {
374 0 : return;
375 : }
376 :
377 520 : _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_SERVICE);
378 520 : _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER);
379 520 : _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_TTY);
380 520 : _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RHOST);
381 520 : _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RUSER);
382 520 : _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_OLDAUTHTOK);
383 520 : _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_AUTHTOK);
384 520 : _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER_PROMPT);
385 520 : _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_CONV);
386 : #ifdef PAM_FAIL_DELAY
387 520 : _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_FAIL_DELAY);
388 : #endif
389 : #ifdef PAM_REPOSITORY
390 : _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_REPOSITORY);
391 : #endif
392 :
393 520 : _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_HOMEDIR);
394 520 : _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSCRIPT);
395 520 : _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSERVER);
396 520 : _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_PROFILEPATH);
397 520 : _PAM_LOG_STATE_DATA_STRING(ctx,
398 : PAM_WINBIND_NEW_AUTHTOK_REQD);
399 : /* Use atoi to get PAM result code */
400 520 : _PAM_LOG_STATE_DATA_STRING(ctx,
401 : PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
402 520 : _PAM_LOG_STATE_DATA_POINTER(ctx, PAM_WINBIND_PWD_LAST_SET);
403 : }
404 :
405 448 : static int _pam_parse(const pam_handle_t *pamh,
406 : int flags,
407 : int argc,
408 : const char **argv,
409 : enum pam_winbind_request_type type,
410 : struct tiniparser_dictionary **result_d)
411 : {
412 448 : int ctrl = 0;
413 448 : const char *config_file = NULL;
414 : int i;
415 : const char **v;
416 448 : struct tiniparser_dictionary *d = NULL;
417 :
418 448 : if (flags & PAM_SILENT) {
419 0 : ctrl |= WINBIND_SILENT;
420 : }
421 :
422 1252 : for (i=argc,v=argv; i-- > 0; ++v) {
423 804 : if (!strncasecmp(*v, "config", strlen("config"))) {
424 0 : ctrl |= WINBIND_CONFIG_FILE;
425 0 : config_file = v[i];
426 0 : break;
427 : }
428 : }
429 :
430 448 : if (config_file == NULL) {
431 448 : config_file = PAM_WINBIND_CONFIG_FILE;
432 : }
433 :
434 448 : d = tiniparser_load(config_file);
435 448 : if (d == NULL) {
436 448 : goto config_from_pam;
437 : }
438 :
439 0 : if (tiniparser_getboolean(d, "global:debug", false)) {
440 0 : ctrl |= WINBIND_DEBUG_ARG;
441 : }
442 :
443 0 : if (tiniparser_getboolean(d, "global:debug_state", false)) {
444 0 : ctrl |= WINBIND_DEBUG_STATE;
445 : }
446 :
447 0 : if (tiniparser_getboolean(d, "global:cached_login", false)) {
448 0 : ctrl |= WINBIND_CACHED_LOGIN;
449 : }
450 :
451 0 : if (tiniparser_getboolean(d, "global:krb5_auth", false)) {
452 0 : ctrl |= WINBIND_KRB5_AUTH;
453 : }
454 :
455 0 : if (tiniparser_getboolean(d, "global:silent", false)) {
456 0 : ctrl |= WINBIND_SILENT;
457 : }
458 :
459 0 : if (tiniparser_getstring_nonempty(d, "global:krb5_ccache_type", NULL) != NULL) {
460 0 : ctrl |= WINBIND_KRB5_CCACHE_TYPE;
461 : }
462 :
463 0 : if ((tiniparser_getstring_nonempty(d, "global:require-membership-of", NULL)
464 0 : != NULL) ||
465 0 : (tiniparser_getstring_nonempty(d, "global:require_membership_of", NULL)
466 : != NULL)) {
467 0 : ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
468 : }
469 :
470 0 : if (tiniparser_getboolean(d, "global:try_first_pass", false)) {
471 0 : ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
472 : }
473 :
474 0 : if (tiniparser_getint(d, "global:warn_pwd_expire", 0)) {
475 0 : ctrl |= WINBIND_WARN_PWD_EXPIRE;
476 : }
477 :
478 0 : if (tiniparser_getboolean(d, "global:mkhomedir", false)) {
479 0 : ctrl |= WINBIND_MKHOMEDIR;
480 : }
481 :
482 224 : config_from_pam:
483 : /* step through arguments */
484 1252 : for (i=argc,v=argv; i-- > 0; ++v) {
485 :
486 : /* generic options */
487 804 : if (!strcmp(*v,"debug"))
488 260 : ctrl |= WINBIND_DEBUG_ARG;
489 544 : else if (!strcasecmp(*v, "debug_state"))
490 260 : ctrl |= WINBIND_DEBUG_STATE;
491 284 : else if (!strcasecmp(*v, "silent"))
492 0 : ctrl |= WINBIND_SILENT;
493 284 : else if (!strcasecmp(*v, "use_authtok"))
494 8 : ctrl |= WINBIND_USE_AUTHTOK_ARG;
495 276 : else if (!strcasecmp(*v, "try_authtok"))
496 8 : ctrl |= WINBIND_TRY_AUTHTOK_ARG;
497 268 : else if (!strcasecmp(*v, "use_first_pass"))
498 0 : ctrl |= WINBIND_USE_FIRST_PASS_ARG;
499 268 : else if (!strcasecmp(*v, "try_first_pass"))
500 0 : ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
501 268 : else if (!strcasecmp(*v, "unknown_ok"))
502 0 : ctrl |= WINBIND_UNKNOWN_OK_ARG;
503 268 : else if ((type == PAM_WINBIND_AUTHENTICATE
504 24 : || type == PAM_WINBIND_SETCRED)
505 244 : && !strncasecmp(*v, "require_membership_of",
506 : strlen("require_membership_of")))
507 0 : ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
508 268 : else if ((type == PAM_WINBIND_AUTHENTICATE
509 24 : || type == PAM_WINBIND_SETCRED)
510 244 : && !strncasecmp(*v, "require-membership-of",
511 : strlen("require-membership-of")))
512 0 : ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
513 268 : else if (!strcasecmp(*v, "krb5_auth"))
514 130 : ctrl |= WINBIND_KRB5_AUTH;
515 138 : else if (!strncasecmp(*v, "krb5_ccache_type",
516 : strlen("krb5_ccache_type")))
517 130 : ctrl |= WINBIND_KRB5_CCACHE_TYPE;
518 8 : else if (!strcasecmp(*v, "cached_login"))
519 0 : ctrl |= WINBIND_CACHED_LOGIN;
520 8 : else if (!strcasecmp(*v, "mkhomedir"))
521 0 : ctrl |= WINBIND_MKHOMEDIR;
522 8 : else if (!strncasecmp(*v, "warn_pwd_expire",
523 : strlen("warn_pwd_expire")))
524 8 : ctrl |= WINBIND_WARN_PWD_EXPIRE;
525 0 : else if (type != PAM_WINBIND_CLEANUP) {
526 0 : __pam_log(pamh, ctrl, LOG_ERR,
527 : "pam_parse: unknown option: %s", *v);
528 0 : return -1;
529 : }
530 :
531 : }
532 :
533 448 : if (result_d) {
534 260 : *result_d = d;
535 : } else {
536 188 : if (d) {
537 0 : tiniparser_freedict(d);
538 : }
539 : }
540 :
541 448 : return ctrl;
542 : };
543 :
544 260 : static int _pam_winbind_free_context(struct pwb_context *ctx)
545 : {
546 260 : if (!ctx) {
547 0 : return 0;
548 : }
549 :
550 260 : if (ctx->dict) {
551 0 : tiniparser_freedict(ctx->dict);
552 : }
553 :
554 260 : wbcCtxFree(ctx->wbc_ctx);
555 :
556 260 : return 0;
557 : }
558 :
559 260 : static int _pam_winbind_init_context(pam_handle_t *pamh,
560 : int flags,
561 : int argc,
562 : const char **argv,
563 : enum pam_winbind_request_type type,
564 : struct pwb_context **ctx_p)
565 : {
566 260 : struct pwb_context *r = NULL;
567 260 : const char *service = NULL;
568 260 : char service_name[32] = {0};
569 : int ctrl_code;
570 :
571 : #ifdef HAVE_GETTEXT
572 260 : textdomain_init();
573 : #endif
574 :
575 260 : r = talloc_zero(NULL, struct pwb_context);
576 260 : if (!r) {
577 0 : return PAM_BUF_ERR;
578 : }
579 :
580 260 : talloc_set_destructor(r, _pam_winbind_free_context);
581 :
582 260 : r->pamh = pamh;
583 260 : r->flags = flags;
584 260 : r->argc = argc;
585 260 : r->argv = argv;
586 260 : ctrl_code = _pam_parse(pamh, flags, argc, argv, type, &r->dict);
587 260 : if (ctrl_code == -1) {
588 0 : TALLOC_FREE(r);
589 0 : return PAM_SYSTEM_ERR;
590 : }
591 260 : r->ctrl = ctrl_code;
592 :
593 260 : r->wbc_ctx = wbcCtxCreate();
594 260 : if (r->wbc_ctx == NULL) {
595 0 : TALLOC_FREE(r);
596 0 : return PAM_SYSTEM_ERR;
597 : }
598 :
599 260 : pam_get_item(pamh, PAM_SERVICE, (const void **)&service);
600 :
601 260 : snprintf(service_name, sizeof(service_name), "PAM_WINBIND[%s]", service);
602 :
603 260 : wbcSetClientProcessName(service_name);
604 :
605 260 : *ctx_p = r;
606 :
607 260 : return PAM_SUCCESS;
608 : }
609 :
610 188 : static void _pam_winbind_cleanup_func(pam_handle_t *pamh,
611 : void *data,
612 : int error_status)
613 : {
614 188 : int ctrl = _pam_parse(pamh, 0, 0, NULL, PAM_WINBIND_CLEANUP, NULL);
615 188 : if (_pam_log_is_debug_state_enabled(ctrl)) {
616 0 : __pam_log_debug(pamh, ctrl, LOG_DEBUG,
617 : "[pamh: %p] CLEAN: cleaning up PAM data %p "
618 : "(error_status = %d)", pamh, data,
619 : error_status);
620 : }
621 188 : TALLOC_FREE(data);
622 188 : }
623 :
624 :
625 : static const struct ntstatus_errors {
626 : const char *ntstatus_string;
627 : const char *error_string;
628 : } ntstatus_errors[] = {
629 : {"NT_STATUS_OK",
630 : N_("Success")},
631 : {"NT_STATUS_BACKUP_CONTROLLER",
632 : N_("No primary Domain Controller available")},
633 : {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
634 : N_("No domain controllers found")},
635 : {"NT_STATUS_NO_LOGON_SERVERS",
636 : N_("No logon servers")},
637 : {"NT_STATUS_PWD_TOO_SHORT",
638 : N_("Password too short")},
639 : {"NT_STATUS_PWD_TOO_RECENT",
640 : N_("The password was recently changed and cannot be changed again before %s")},
641 : {"NT_STATUS_PWD_HISTORY_CONFLICT",
642 : N_("Password is already in password history")},
643 : {"NT_STATUS_PASSWORD_EXPIRED",
644 : N_("Your password has expired")},
645 : {"NT_STATUS_PASSWORD_MUST_CHANGE",
646 : N_("You need to change your password now")},
647 : {"NT_STATUS_INVALID_WORKSTATION",
648 : N_("You are not allowed to logon from this workstation")},
649 : {"NT_STATUS_INVALID_LOGON_HOURS",
650 : N_("You are not allowed to logon at this time")},
651 : {"NT_STATUS_ACCOUNT_EXPIRED",
652 : N_("Your account has expired. "
653 : "Please contact your System administrator")}, /* SCNR */
654 : {"NT_STATUS_ACCOUNT_DISABLED",
655 : N_("Your account is disabled. "
656 : "Please contact your System administrator")}, /* SCNR */
657 : {"NT_STATUS_ACCOUNT_LOCKED_OUT",
658 : N_("Your account has been locked. "
659 : "Please contact your System administrator")}, /* SCNR */
660 : {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
661 : N_("Invalid Trust Account")},
662 : {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
663 : N_("Invalid Trust Account")},
664 : {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
665 : N_("Invalid Trust Account")},
666 : {"NT_STATUS_ACCESS_DENIED",
667 : N_("Access is denied")},
668 : {NULL, NULL}
669 : };
670 :
671 52 : static const char *_get_ntstatus_error_string(const char *nt_status_string)
672 : {
673 : int i;
674 988 : for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
675 936 : if (!strcasecmp(ntstatus_errors[i].ntstatus_string,
676 : nt_status_string)) {
677 0 : return _(ntstatus_errors[i].error_string);
678 : }
679 : }
680 52 : return NULL;
681 : }
682 :
683 : /* --- authentication management functions --- */
684 :
685 : /* Attempt a conversation */
686 :
687 312 : static int converse(const pam_handle_t *pamh,
688 : int nargs,
689 : const struct pam_message **message,
690 : struct pam_response **response)
691 : {
692 : int retval;
693 : const struct pam_conv *conv;
694 :
695 312 : retval = pam_get_item(pamh, PAM_CONV, (const void **) &conv);
696 312 : if (retval == PAM_SUCCESS) {
697 468 : retval = conv->conv(nargs,
698 : discard_const_p(const struct pam_message *, message),
699 312 : response, conv->appdata_ptr);
700 : }
701 :
702 312 : return retval; /* propagate error status */
703 : }
704 :
705 :
706 56 : static int _make_remark(struct pwb_context *ctx,
707 : int type,
708 : const char *text)
709 : {
710 56 : int retval = PAM_SUCCESS;
711 :
712 : const struct pam_message *pmsg[1];
713 : struct pam_message msg[1];
714 : struct pam_response *resp;
715 :
716 56 : if (ctx->flags & WINBIND_SILENT) {
717 0 : return PAM_SUCCESS;
718 : }
719 :
720 56 : pmsg[0] = &msg[0];
721 56 : msg[0].msg = discard_const_p(char, text);
722 56 : msg[0].msg_style = type;
723 :
724 56 : resp = NULL;
725 56 : retval = converse(ctx->pamh, 1, pmsg, &resp);
726 :
727 56 : if (resp) {
728 3436 : _pam_drop_reply(resp, 1);
729 : }
730 56 : return retval;
731 : }
732 :
733 : static int _make_remark_v(struct pwb_context *ctx,
734 : int type,
735 : const char *format,
736 : va_list args) PRINTF_ATTRIBUTE(3, 0);
737 :
738 4 : static int _make_remark_v(struct pwb_context *ctx,
739 : int type,
740 : const char *format,
741 : va_list args)
742 : {
743 : char *var;
744 : int ret;
745 :
746 4 : ret = vasprintf(&var, format, args);
747 4 : if (ret < 0) {
748 0 : _pam_log(ctx, LOG_ERR, "memory allocation failure");
749 0 : return ret;
750 : }
751 :
752 4 : ret = _make_remark(ctx, type, var);
753 4 : SAFE_FREE(var);
754 4 : return ret;
755 : }
756 :
757 : static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
758 4 : static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...)
759 : {
760 : int ret;
761 : va_list args;
762 :
763 4 : va_start(args, format);
764 4 : ret = _make_remark_v(ctx, type, format, args);
765 4 : va_end(args);
766 4 : return ret;
767 : }
768 :
769 260 : static int pam_winbind_request_log(struct pwb_context *ctx,
770 : int retval,
771 : const char *user,
772 : const char *fn)
773 : {
774 260 : switch (retval) {
775 76 : case PAM_AUTH_ERR:
776 : /* incorrect password */
777 76 : _pam_log(ctx, LOG_WARNING, "user '%s' denied access "
778 : "(incorrect password or invalid membership)", user);
779 76 : return retval;
780 0 : case PAM_ACCT_EXPIRED:
781 : /* account expired */
782 0 : _pam_log(ctx, LOG_WARNING, "user '%s' account expired",
783 : user);
784 0 : return retval;
785 0 : case PAM_AUTHTOK_EXPIRED:
786 : /* password expired */
787 0 : _pam_log(ctx, LOG_WARNING, "user '%s' password expired",
788 : user);
789 0 : return retval;
790 0 : case PAM_NEW_AUTHTOK_REQD:
791 : /* new password required */
792 0 : _pam_log(ctx, LOG_WARNING, "user '%s' new password "
793 : "required", user);
794 0 : return retval;
795 0 : case PAM_USER_UNKNOWN:
796 : /* the user does not exist */
797 0 : _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
798 : user);
799 0 : if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
800 0 : return PAM_IGNORE;
801 : }
802 0 : return retval;
803 0 : case PAM_AUTHTOK_ERR:
804 : /* Authentication token manipulation error */
805 0 : _pam_log(ctx, LOG_WARNING, "user `%s' authentication token change failed "
806 : "(pwd complexity/history/min_age not met?)", user);
807 0 : return retval;
808 184 : case PAM_SUCCESS:
809 : /* Otherwise, the authentication looked good */
810 184 : if (strcmp(fn, "wbcLogonUser") == 0) {
811 172 : _pam_log(ctx, LOG_NOTICE,
812 : "user '%s' granted access", user);
813 : } else {
814 12 : _pam_log(ctx, LOG_NOTICE,
815 : "user '%s' OK", user);
816 : }
817 184 : return retval;
818 0 : default:
819 : /* we don't know anything about this return value */
820 0 : _pam_log(ctx, LOG_ERR,
821 : "internal module error (retval = %s(%d), user = '%s')",
822 : _pam_error_code_str(retval), retval, user);
823 0 : return retval;
824 : }
825 : }
826 :
827 260 : static int wbc_auth_error_to_pam_error(struct pwb_context *ctx,
828 : struct wbcAuthErrorInfo *e,
829 : wbcErr status,
830 : const char *username,
831 : const char *fn)
832 : {
833 260 : int ret = PAM_AUTH_ERR;
834 :
835 260 : if (WBC_ERROR_IS_OK(status)) {
836 184 : _pam_log_debug(ctx, LOG_DEBUG, "request %s succeeded",
837 : fn);
838 184 : ret = PAM_SUCCESS;
839 184 : return pam_winbind_request_log(ctx, ret, username, fn);
840 : }
841 :
842 76 : if (e) {
843 76 : if (e->pam_error != PAM_SUCCESS) {
844 76 : _pam_log(ctx, LOG_ERR,
845 : "request %s failed: %s, "
846 : "PAM error: %s (%d), NTSTATUS: %s, "
847 : "Error message was: %s",
848 : fn,
849 : wbcErrorString(status),
850 : _pam_error_code_str(e->pam_error),
851 : e->pam_error,
852 : e->nt_string,
853 : e->display_string);
854 76 : ret = e->pam_error;
855 76 : return pam_winbind_request_log(ctx, ret, username, fn);
856 : }
857 :
858 0 : _pam_log(ctx, LOG_ERR, "request %s failed, but PAM error 0!", fn);
859 :
860 0 : ret = PAM_SERVICE_ERR;
861 0 : return pam_winbind_request_log(ctx, ret, username, fn);
862 : }
863 :
864 0 : ret = wbc_error_to_pam_error(status);
865 0 : _pam_log(ctx, LOG_ERR,
866 : "request %s failed: %s, PAM error: %s (%d)!",
867 : fn, wbcErrorString(status),
868 : _pam_error_code_str(ret), ret);
869 0 : return pam_winbind_request_log(ctx, ret, username, fn);
870 : }
871 :
872 : #if defined(HAVE_PAM_RADIO_TYPE)
873 4 : static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
874 : {
875 : struct pam_message msg;
876 : const struct pam_message *pmsg;
877 4 : struct pam_response *resp = NULL;
878 : int ret;
879 4 : bool retval = false;
880 4 : pmsg = &msg;
881 4 : msg.msg_style = PAM_RADIO_TYPE;
882 4 : msg.msg = _("Do you want to change your password now?");
883 4 : ret = converse(ctx->pamh, 1, &pmsg, &resp);
884 4 : if (resp == NULL) {
885 0 : if (ret == PAM_SUCCESS) {
886 0 : _pam_log(ctx, LOG_CRIT, "pam_winbind: system error!\n");
887 0 : return false;
888 : }
889 : }
890 4 : if (ret != PAM_SUCCESS) {
891 0 : return false;
892 : }
893 4 : _pam_log(ctx, LOG_CRIT, "Received [%s] reply from application.\n", resp->resp);
894 :
895 4 : if ((resp->resp != NULL) && (strcasecmp(resp->resp, "yes") == 0)) {
896 0 : retval = true;
897 : }
898 :
899 6 : _pam_drop_reply(resp, 1);
900 4 : return retval;
901 : }
902 : #else
903 : static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
904 : {
905 : return false;
906 : }
907 : #endif
908 :
909 : /**
910 : * send a password expiry message if required
911 : *
912 : * @param ctx PAM winbind context.
913 : * @param next_change expected (calculated) next expiry date.
914 : * @param already_expired pointer to a boolean to indicate if the password is
915 : * already expired.
916 : *
917 : * @return boolean Returns true if message has been sent, false if not.
918 : */
919 :
920 172 : static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
921 : time_t next_change,
922 : time_t now,
923 : int warn_pwd_expire,
924 : bool *already_expired,
925 : bool *change_pwd)
926 : {
927 172 : int days = 0;
928 : struct tm tm_now, tm_next_change;
929 172 : bool retval = false;
930 : int ret;
931 :
932 172 : if (already_expired) {
933 172 : *already_expired = false;
934 : }
935 :
936 172 : if (change_pwd) {
937 172 : *change_pwd = false;
938 : }
939 :
940 172 : if (next_change <= now) {
941 0 : PAM_WB_REMARK_DIRECT(ctx, "NT_STATUS_PASSWORD_EXPIRED");
942 0 : if (already_expired) {
943 0 : *already_expired = true;
944 : }
945 0 : return true;
946 : }
947 :
948 258 : if ((next_change < 0) ||
949 172 : (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
950 168 : return false;
951 : }
952 :
953 8 : if ((localtime_r(&now, &tm_now) == NULL) ||
954 4 : (localtime_r(&next_change, &tm_next_change) == NULL)) {
955 0 : return false;
956 : }
957 :
958 6 : days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) -
959 4 : (tm_now.tm_yday+tm_now.tm_year*365);
960 :
961 4 : if (days == 0) {
962 0 : ret = _make_remark(ctx, PAM_TEXT_INFO,
963 0 : _("Your password expires today.\n"));
964 :
965 : /*
966 : * If change_pwd and already_expired is null.
967 : * We are just sending a notification message.
968 : * We don't expect any response in this case.
969 : */
970 :
971 0 : if (!change_pwd && !already_expired) {
972 0 : return true;
973 : }
974 :
975 : /*
976 : * successfully sent the warning message.
977 : * Give the user a chance to change pwd.
978 : */
979 0 : if (ret == PAM_SUCCESS) {
980 0 : if (change_pwd) {
981 0 : retval = _pam_winbind_change_pwd(ctx);
982 0 : if (retval) {
983 0 : *change_pwd = true;
984 : }
985 : }
986 : }
987 0 : return true;
988 : }
989 :
990 4 : if (days > 0 && days < warn_pwd_expire) {
991 :
992 6 : ret = _make_remark_format(ctx, PAM_TEXT_INFO,
993 4 : _("Your password will expire in %d %s.\n"),
994 2 : days, (days > 1) ? _("days"):_("day"));
995 : /*
996 : * If change_pwd and already_expired is null.
997 : * We are just sending a notification message.
998 : * We don't expect any response in this case.
999 : */
1000 :
1001 4 : if (!change_pwd && !already_expired) {
1002 0 : return true;
1003 : }
1004 :
1005 : /*
1006 : * successfully sent the warning message.
1007 : * Give the user a chance to change pwd.
1008 : */
1009 4 : if (ret == PAM_SUCCESS) {
1010 4 : if (change_pwd) {
1011 4 : retval = _pam_winbind_change_pwd(ctx);
1012 4 : if (retval) {
1013 0 : *change_pwd = true;
1014 : }
1015 : }
1016 : }
1017 4 : return true;
1018 : }
1019 :
1020 0 : return false;
1021 : }
1022 :
1023 : /**
1024 : * Send a warning if the password expires in the near future
1025 : *
1026 : * @param ctx PAM winbind context.
1027 : * @param response The full authentication response structure.
1028 : * @param already_expired boolean, is the pwd already expired?
1029 : *
1030 : * @return void.
1031 : */
1032 :
1033 172 : static void _pam_warn_password_expiry(struct pwb_context *ctx,
1034 : const struct wbcAuthUserInfo *info,
1035 : int warn_pwd_expire,
1036 : bool *already_expired,
1037 : bool *change_pwd)
1038 : {
1039 172 : time_t now = time(NULL);
1040 172 : time_t next_change = 0;
1041 :
1042 172 : if (info == NULL) {
1043 0 : return;
1044 : }
1045 :
1046 172 : if (already_expired) {
1047 172 : *already_expired = false;
1048 : }
1049 :
1050 172 : if (change_pwd) {
1051 172 : *change_pwd = false;
1052 : }
1053 :
1054 : /* accounts with WBC_ACB_PWNOEXP set never receive a warning */
1055 172 : if (info->acct_flags & WBC_ACB_PWNOEXP) {
1056 0 : return;
1057 : }
1058 :
1059 : /* no point in sending a warning if this is a grace logon */
1060 172 : if (PAM_WB_GRACE_LOGON(info->user_flags)) {
1061 0 : return;
1062 : }
1063 :
1064 : /* check if the info3 must change timestamp has been set */
1065 172 : next_change = info->pass_must_change_time;
1066 :
1067 172 : if (_pam_send_password_expiry_message(ctx, next_change, now,
1068 : warn_pwd_expire,
1069 : already_expired,
1070 : change_pwd)) {
1071 4 : return;
1072 : }
1073 :
1074 : /* no warning sent */
1075 : }
1076 :
1077 : #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
1078 :
1079 : /**
1080 : * Append a string, making sure not to overflow and to always return a
1081 : * NULL-terminated string.
1082 : *
1083 : * @param dest Destination string buffer (must already be NULL-terminated).
1084 : * @param src Source string buffer.
1085 : * @param dest_buffer_size Size of dest buffer in bytes.
1086 : *
1087 : * @return false if dest buffer is not big enough (no bytes copied), true on
1088 : * success.
1089 : */
1090 :
1091 0 : static bool safe_append_string(char *dest,
1092 : const char *src,
1093 : int dest_buffer_size)
1094 : {
1095 : size_t len;
1096 0 : len = strlcat(dest, src, dest_buffer_size);
1097 0 : return (len < dest_buffer_size);
1098 : }
1099 :
1100 : /**
1101 : * Convert a names into a SID string, appending it to a buffer.
1102 : *
1103 : * @param ctx PAM winbind context.
1104 : * @param user User in PAM request.
1105 : * @param name Name to convert.
1106 : * @param sid_list_buffer Where to append the string sid.
1107 : * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1108 : *
1109 : * @return false on failure, true on success.
1110 : */
1111 0 : static bool winbind_name_to_sid_string(struct pwb_context *ctx,
1112 : const char *user,
1113 : const char *name,
1114 : char *sid_list_buffer,
1115 : int sid_list_buffer_size)
1116 : {
1117 : char sid_string[WBC_SID_STRING_BUFLEN];
1118 :
1119 : /* lookup name? */
1120 0 : if (IS_SID_STRING(name)) {
1121 0 : strlcpy(sid_string, name, sizeof(sid_string));
1122 : } else {
1123 : wbcErr wbc_status;
1124 : struct wbcDomainSid sid;
1125 : enum wbcSidType type;
1126 :
1127 0 : _pam_log_debug(ctx, LOG_DEBUG,
1128 : "no sid given, looking up: %s\n", name);
1129 :
1130 0 : wbc_status = wbcCtxLookupName(ctx->wbc_ctx,
1131 : "",
1132 : name,
1133 : &sid,
1134 : &type);
1135 0 : if (!WBC_ERROR_IS_OK(wbc_status)) {
1136 0 : _pam_log(ctx, LOG_INFO,
1137 : "could not lookup name: %s\n", name);
1138 0 : return false;
1139 : }
1140 :
1141 0 : wbcSidToStringBuf(&sid, sid_string, sizeof(sid_string));
1142 : }
1143 :
1144 0 : if (!safe_append_string(sid_list_buffer, sid_string,
1145 : sid_list_buffer_size)) {
1146 0 : return false;
1147 : }
1148 0 : return true;
1149 : }
1150 :
1151 : /**
1152 : * Convert a list of names into a list of sids.
1153 : *
1154 : * @param ctx PAM winbind context.
1155 : * @param user User in PAM request.
1156 : * @param name_list List of names or string sids, separated by commas.
1157 : * @param sid_list_buffer Where to put the list of string sids.
1158 : * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1159 : *
1160 : * @return false on failure, true on success.
1161 : */
1162 0 : static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
1163 : const char *user,
1164 : const char *name_list,
1165 : char *sid_list_buffer,
1166 : int sid_list_buffer_size)
1167 : {
1168 0 : bool result = false;
1169 0 : char *current_name = NULL;
1170 : const char *search_location;
1171 : const char *comma;
1172 : int len;
1173 :
1174 0 : if (sid_list_buffer_size > 0) {
1175 0 : sid_list_buffer[0] = 0;
1176 : }
1177 :
1178 0 : search_location = name_list;
1179 0 : while ((comma = strchr(search_location, ',')) != NULL) {
1180 0 : current_name = strndup(search_location,
1181 0 : comma - search_location);
1182 0 : if (NULL == current_name) {
1183 0 : goto out;
1184 : }
1185 :
1186 0 : if (!winbind_name_to_sid_string(ctx, user,
1187 : current_name,
1188 : sid_list_buffer,
1189 : sid_list_buffer_size)) {
1190 : /*
1191 : * If one group name failed, we must not fail
1192 : * the authentication totally, continue with
1193 : * the following group names. If user belongs to
1194 : * one of the valid groups, we must allow it
1195 : * login. -- BoYang
1196 : */
1197 :
1198 0 : _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1199 : "check if group %s is valid group.", current_name,
1200 : current_name);
1201 0 : _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1202 : "to sid, please contact your administrator to see "
1203 : "if group %s is valid."), current_name, current_name);
1204 0 : SAFE_FREE(current_name);
1205 0 : search_location = comma + 1;
1206 0 : continue;
1207 : }
1208 :
1209 0 : SAFE_FREE(current_name);
1210 :
1211 0 : if (!safe_append_string(sid_list_buffer, ",",
1212 : sid_list_buffer_size)) {
1213 0 : goto out;
1214 : }
1215 :
1216 0 : search_location = comma + 1;
1217 : }
1218 :
1219 0 : if (!winbind_name_to_sid_string(ctx, user, search_location,
1220 : sid_list_buffer,
1221 : sid_list_buffer_size)) {
1222 0 : _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1223 : "check if group %s is valid group.", search_location,
1224 : search_location);
1225 0 : _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1226 : "to sid, please contact your administrator to see "
1227 : "if group %s is valid."), search_location, search_location);
1228 :
1229 : /* If no valid groups were converted we should fail outright */
1230 0 : if (name_list != NULL && strlen(sid_list_buffer) == 0) {
1231 0 : result = false;
1232 0 : goto out;
1233 : }
1234 : /*
1235 : * The lookup of the last name failed..
1236 : * It results in require_member_of_sid ends with ','
1237 : * It is malformatted parameter here, overwrite the last ','.
1238 : */
1239 0 : len = strlen(sid_list_buffer);
1240 0 : if ((len != 0) && (sid_list_buffer[len - 1] == ',')) {
1241 0 : sid_list_buffer[len - 1] = '\0';
1242 : }
1243 : }
1244 :
1245 0 : result = true;
1246 :
1247 0 : out:
1248 0 : SAFE_FREE(current_name);
1249 0 : return result;
1250 : }
1251 :
1252 : /**
1253 : * put krb5ccname variable into environment
1254 : *
1255 : * @param ctx PAM winbind context.
1256 : * @param krb5ccname env variable retrieved from winbindd.
1257 : *
1258 : * @return void.
1259 : */
1260 :
1261 172 : static void _pam_setup_krb5_env(struct pwb_context *ctx,
1262 : struct wbcLogonUserInfo *info)
1263 : {
1264 172 : char *var = NULL;
1265 : int ret;
1266 : uint32_t i;
1267 172 : const char *krb5ccname = NULL;
1268 :
1269 172 : if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
1270 163 : return;
1271 : }
1272 :
1273 86 : if (!info) {
1274 0 : return;
1275 : }
1276 :
1277 114 : for (i=0; i < info->num_blobs; i++) {
1278 80 : if (strcasecmp(info->blobs[i].name, "krb5ccname") == 0) {
1279 52 : krb5ccname = (const char *)info->blobs[i].blob.data;
1280 52 : break;
1281 : }
1282 : }
1283 :
1284 86 : if (!krb5ccname || (strlen(krb5ccname) == 0)) {
1285 34 : return;
1286 : }
1287 :
1288 52 : _pam_log_debug(ctx, LOG_DEBUG,
1289 : "request returned KRB5CCNAME: %s", krb5ccname);
1290 :
1291 52 : if (asprintf(&var, "KRB5CCNAME=%s", krb5ccname) == -1) {
1292 0 : return;
1293 : }
1294 :
1295 52 : ret = pam_putenv(ctx->pamh, var);
1296 52 : if (ret != PAM_SUCCESS) {
1297 0 : _pam_log(ctx, LOG_ERR,
1298 : "failed to set KRB5CCNAME to %s: %s",
1299 : var, pam_strerror(ctx->pamh, ret));
1300 : }
1301 52 : free(var);
1302 : }
1303 :
1304 : /**
1305 : * Copy unix username if available (further processed in PAM).
1306 : *
1307 : * @param ctx PAM winbind context
1308 : * @param user_ret A pointer that holds a pointer to a string
1309 : * @param unix_username A username
1310 : *
1311 : * @return void.
1312 : */
1313 :
1314 172 : static void _pam_setup_unix_username(struct pwb_context *ctx,
1315 : char **user_ret,
1316 : struct wbcLogonUserInfo *info)
1317 : {
1318 172 : const char *unix_username = NULL;
1319 : uint32_t i;
1320 :
1321 172 : if (!user_ret || !info) {
1322 12 : return;
1323 : }
1324 :
1325 212 : for (i=0; i < info->num_blobs; i++) {
1326 212 : if (strcasecmp(info->blobs[i].name, "unix_username") == 0) {
1327 160 : unix_username = (const char *)info->blobs[i].blob.data;
1328 160 : break;
1329 : }
1330 : }
1331 :
1332 160 : if (!unix_username || !unix_username[0]) {
1333 0 : return;
1334 : }
1335 :
1336 160 : *user_ret = strdup(unix_username);
1337 : }
1338 :
1339 : /**
1340 : * Set string into the PAM stack.
1341 : *
1342 : * @param ctx PAM winbind context.
1343 : * @param data_name Key name for pam_set_data.
1344 : * @param value String value.
1345 : *
1346 : * @return void.
1347 : */
1348 :
1349 688 : static void _pam_set_data_string(struct pwb_context *ctx,
1350 : const char *data_name,
1351 : const char *value)
1352 : {
1353 : int ret;
1354 :
1355 1032 : if (!data_name || !value || (strlen(data_name) == 0) ||
1356 688 : (strlen(value) == 0)) {
1357 500 : return;
1358 : }
1359 :
1360 188 : ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
1361 : _pam_winbind_cleanup_func);
1362 188 : if (ret != PAM_SUCCESS) {
1363 0 : _pam_log_debug(ctx, LOG_DEBUG,
1364 : "Could not set data %s: %s\n",
1365 : data_name, pam_strerror(ctx->pamh, ret));
1366 : }
1367 : }
1368 :
1369 : /**
1370 : * Set info3 strings into the PAM stack.
1371 : *
1372 : * @param ctx PAM winbind context.
1373 : * @param data_name Key name for pam_set_data.
1374 : * @param value String value.
1375 : *
1376 : * @return void.
1377 : */
1378 :
1379 172 : static void _pam_set_data_info3(struct pwb_context *ctx,
1380 : const struct wbcAuthUserInfo *info)
1381 : {
1382 172 : if (info != NULL) {
1383 172 : _pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
1384 172 : info->home_directory);
1385 172 : _pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
1386 172 : info->logon_script);
1387 172 : _pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
1388 172 : info->logon_server);
1389 172 : _pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
1390 172 : info->profile_path);
1391 : }
1392 172 : }
1393 :
1394 : /**
1395 : * Free info3 strings in the PAM stack.
1396 : *
1397 : * @param pamh PAM handle
1398 : *
1399 : * @return void.
1400 : */
1401 :
1402 76 : static void _pam_free_data_info3(pam_handle_t *pamh)
1403 : {
1404 76 : pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1405 76 : pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1406 76 : pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1407 76 : pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1408 76 : }
1409 :
1410 : /**
1411 : * Send PAM_ERROR_MSG for cached or grace logons.
1412 : *
1413 : * @param ctx PAM winbind context.
1414 : * @param username User in PAM request.
1415 : * @param info3_user_flgs Info3 flags containing logon type bits.
1416 : *
1417 : * @return void.
1418 : */
1419 :
1420 172 : static void _pam_warn_logon_type(struct pwb_context *ctx,
1421 : const char *username,
1422 : uint32_t info3_user_flgs)
1423 : {
1424 : /* inform about logon type */
1425 172 : if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1426 :
1427 0 : _make_remark(ctx, PAM_ERROR_MSG,
1428 0 : _("Grace login. "
1429 : "Please change your password as soon you're "
1430 : "online again"));
1431 0 : _pam_log_debug(ctx, LOG_DEBUG,
1432 : "User %s logged on using grace logon\n",
1433 : username);
1434 :
1435 172 : } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1436 :
1437 0 : _make_remark(ctx, PAM_ERROR_MSG,
1438 0 : _("Domain Controller unreachable, "
1439 : "using cached credentials instead. "
1440 : "Network resources may be unavailable"));
1441 0 : _pam_log_debug(ctx, LOG_DEBUG,
1442 : "User %s logged on using cached credentials\n",
1443 : username);
1444 : }
1445 172 : }
1446 :
1447 : /**
1448 : * Send PAM_ERROR_MSG for krb5 errors.
1449 : *
1450 : * @param ctx PAM winbind context.
1451 : * @param username User in PAM request.
1452 : * @param info3_user_flgs Info3 flags containing logon type bits.
1453 : *
1454 : * @return void.
1455 : */
1456 :
1457 172 : static void _pam_warn_krb5_failure(struct pwb_context *ctx,
1458 : const char *username,
1459 : uint32_t info3_user_flgs)
1460 : {
1461 172 : if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1462 0 : _make_remark(ctx, PAM_ERROR_MSG,
1463 0 : _("Failed to establish your Kerberos Ticket cache "
1464 : "due time differences\n"
1465 : "with the domain controller. "
1466 : "Please verify the system time.\n"));
1467 0 : _pam_log_debug(ctx, LOG_DEBUG,
1468 : "User %s: Clock skew when getting Krb5 TGT\n",
1469 : username);
1470 : }
1471 172 : }
1472 :
1473 3492 : static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
1474 : const struct wbcAuthErrorInfo *e,
1475 : const char *nt_status_string,
1476 : int *pam_err)
1477 : {
1478 3492 : const char *ntstatus = NULL;
1479 3492 : const char *error_string = NULL;
1480 :
1481 3492 : if (!e || !pam_err) {
1482 2480 : return false;
1483 : }
1484 :
1485 1012 : ntstatus = e->nt_string;
1486 1012 : if (!ntstatus) {
1487 0 : return false;
1488 : }
1489 :
1490 1012 : if (strcasecmp(ntstatus, nt_status_string) == 0) {
1491 :
1492 52 : error_string = _get_ntstatus_error_string(nt_status_string);
1493 52 : if (error_string) {
1494 0 : _make_remark(ctx, PAM_ERROR_MSG, error_string);
1495 0 : *pam_err = e->pam_error;
1496 0 : return true;
1497 : }
1498 :
1499 52 : if (e->display_string) {
1500 52 : _make_remark(ctx, PAM_ERROR_MSG, _(e->display_string));
1501 52 : *pam_err = e->pam_error;
1502 52 : return true;
1503 : }
1504 :
1505 0 : _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
1506 0 : *pam_err = e->pam_error;
1507 :
1508 0 : return true;
1509 : }
1510 :
1511 960 : return false;
1512 : };
1513 :
1514 : /**
1515 : * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1516 : *
1517 : * @param i The wbcUserPasswordPolicyInfo struct.
1518 : *
1519 : * @return string (caller needs to talloc_free).
1520 : */
1521 :
1522 0 : static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
1523 : struct wbcUserPasswordPolicyInfo *i)
1524 : {
1525 0 : char *str = NULL;
1526 :
1527 0 : if (!i) {
1528 0 : goto failed;
1529 : }
1530 :
1531 0 : str = talloc_asprintf(ctx, _("Your password "));
1532 0 : if (!str) {
1533 0 : goto failed;
1534 : }
1535 :
1536 0 : if (i->min_length_password > 0) {
1537 0 : str = talloc_asprintf_append(str,
1538 0 : _("must be at least %d characters; "),
1539 : i->min_length_password);
1540 0 : if (!str) {
1541 0 : goto failed;
1542 : }
1543 : }
1544 :
1545 0 : if (i->password_history > 0) {
1546 0 : str = talloc_asprintf_append(str,
1547 0 : _("cannot repeat any of your previous %d "
1548 : "passwords; "),
1549 : i->password_history);
1550 0 : if (!str) {
1551 0 : goto failed;
1552 : }
1553 : }
1554 :
1555 0 : if (i->password_properties & WBC_DOMAIN_PASSWORD_COMPLEX) {
1556 0 : str = talloc_asprintf_append(str,
1557 0 : _("must contain capitals, numerals "
1558 : "or punctuation; "
1559 : "and cannot contain your account "
1560 : "or full name; "));
1561 0 : if (!str) {
1562 0 : goto failed;
1563 : }
1564 : }
1565 :
1566 0 : str = talloc_asprintf_append(str,
1567 0 : _("Please type a different password. "
1568 : "Type a password which meets these requirements in "
1569 : "both text boxes."));
1570 0 : if (!str) {
1571 0 : goto failed;
1572 : }
1573 :
1574 0 : return str;
1575 :
1576 0 : failed:
1577 0 : TALLOC_FREE(str);
1578 0 : return NULL;
1579 : }
1580 :
1581 0 : static int _pam_create_homedir(struct pwb_context *ctx,
1582 : const char *dirname,
1583 : mode_t mode)
1584 : {
1585 : int ret;
1586 :
1587 0 : ret = mkdir(dirname, mode);
1588 0 : if (ret != 0 && errno == EEXIST) {
1589 : struct stat sbuf;
1590 :
1591 0 : ret = stat(dirname, &sbuf);
1592 0 : if (ret != 0) {
1593 0 : return PAM_PERM_DENIED;
1594 : }
1595 :
1596 0 : if (!S_ISDIR(sbuf.st_mode)) {
1597 0 : return PAM_PERM_DENIED;
1598 : }
1599 : }
1600 :
1601 0 : if (ret != 0) {
1602 0 : _make_remark_format(ctx, PAM_TEXT_INFO,
1603 0 : _("Creating directory: %s failed: %s"),
1604 0 : dirname, strerror(errno));
1605 0 : _pam_log(ctx, LOG_ERR, "could not create dir: %s (%s)",
1606 0 : dirname, strerror(errno));
1607 0 : return PAM_PERM_DENIED;
1608 : }
1609 :
1610 0 : return PAM_SUCCESS;
1611 : }
1612 :
1613 0 : static int _pam_chown_homedir(struct pwb_context *ctx,
1614 : const char *dirname,
1615 : uid_t uid,
1616 : gid_t gid)
1617 : {
1618 0 : if (chown(dirname, uid, gid) != 0) {
1619 0 : _pam_log(ctx, LOG_ERR, "failed to chown user homedir: %s (%s)",
1620 0 : dirname, strerror(errno));
1621 0 : return PAM_PERM_DENIED;
1622 : }
1623 :
1624 0 : return PAM_SUCCESS;
1625 : }
1626 :
1627 0 : static int _pam_mkhomedir(struct pwb_context *ctx)
1628 : {
1629 0 : struct passwd *pwd = NULL;
1630 0 : char *token = NULL;
1631 0 : char *create_dir = NULL;
1632 0 : char *user_dir = NULL;
1633 : int ret;
1634 : const char *username;
1635 0 : mode_t mode = 0700;
1636 0 : char *safe_ptr = NULL;
1637 0 : char *p = NULL;
1638 :
1639 : /* Get the username */
1640 0 : ret = pam_get_user(ctx->pamh, &username, NULL);
1641 0 : if ((ret != PAM_SUCCESS) || (!username)) {
1642 0 : _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1643 0 : return PAM_SERVICE_ERR;
1644 : }
1645 :
1646 0 : pwd = getpwnam(username);
1647 0 : if (pwd == NULL) {
1648 0 : _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1649 0 : return PAM_USER_UNKNOWN;
1650 : }
1651 0 : _pam_log_debug(ctx, LOG_DEBUG, "homedir is: %s", pwd->pw_dir);
1652 :
1653 0 : ret = _pam_create_homedir(ctx, pwd->pw_dir, 0700);
1654 0 : if (ret == PAM_SUCCESS) {
1655 0 : ret = _pam_chown_homedir(ctx, pwd->pw_dir,
1656 : pwd->pw_uid,
1657 : pwd->pw_gid);
1658 : }
1659 :
1660 0 : if (ret == PAM_SUCCESS) {
1661 0 : return ret;
1662 : }
1663 :
1664 : /* maybe we need to create parent dirs */
1665 0 : create_dir = talloc_strdup(ctx, "/");
1666 0 : if (!create_dir) {
1667 0 : return PAM_BUF_ERR;
1668 : }
1669 :
1670 : /* find final directory */
1671 0 : user_dir = strrchr(pwd->pw_dir, '/');
1672 0 : if (!user_dir) {
1673 0 : return PAM_BUF_ERR;
1674 : }
1675 0 : user_dir++;
1676 :
1677 0 : _pam_log(ctx, LOG_DEBUG, "final directory: %s", user_dir);
1678 :
1679 0 : p = pwd->pw_dir;
1680 :
1681 0 : while ((token = strtok_r(p, "/", &safe_ptr)) != NULL) {
1682 :
1683 0 : mode = 0755;
1684 :
1685 0 : p = NULL;
1686 :
1687 0 : _pam_log_debug(ctx, LOG_DEBUG, "token is %s", token);
1688 :
1689 0 : create_dir = talloc_asprintf_append(create_dir, "%s/", token);
1690 0 : if (!create_dir) {
1691 0 : return PAM_BUF_ERR;
1692 : }
1693 0 : _pam_log_debug(ctx, LOG_DEBUG, "current_dir is %s", create_dir);
1694 :
1695 0 : if (strcmp(token, user_dir) == 0) {
1696 0 : _pam_log_debug(ctx, LOG_DEBUG, "assuming last directory: %s", token);
1697 0 : mode = 0700;
1698 : }
1699 :
1700 0 : ret = _pam_create_homedir(ctx, create_dir, mode);
1701 0 : if (ret != PAM_SUCCESS) {
1702 0 : return ret;
1703 : }
1704 : }
1705 :
1706 0 : return _pam_chown_homedir(ctx, create_dir,
1707 : pwd->pw_uid,
1708 : pwd->pw_gid);
1709 : }
1710 :
1711 : /* talk to winbindd */
1712 248 : static int winbind_auth_request(struct pwb_context *ctx,
1713 : const char *user,
1714 : const char *pass,
1715 : const char *member,
1716 : const char *cctype,
1717 : const int warn_pwd_expire,
1718 : struct wbcAuthErrorInfo **p_error,
1719 : struct wbcLogonUserInfo **p_info,
1720 : time_t *pwd_last_set,
1721 : char **user_ret)
1722 : {
1723 : wbcErr wbc_status;
1724 : struct wbcLogonUserParams logon;
1725 : char membership_of[1024];
1726 248 : uid_t user_uid = -1;
1727 248 : uint32_t flags = WBFLAG_PAM_INFO3_TEXT;
1728 248 : struct wbcLogonUserInfo *info = NULL;
1729 248 : struct wbcAuthUserInfo *user_info = NULL;
1730 248 : struct wbcAuthErrorInfo *error = NULL;
1731 248 : int ret = PAM_AUTH_ERR;
1732 : int i;
1733 248 : const char *codes[] = {
1734 : "NT_STATUS_PASSWORD_EXPIRED",
1735 : "NT_STATUS_PASSWORD_MUST_CHANGE",
1736 : "NT_STATUS_INVALID_WORKSTATION",
1737 : "NT_STATUS_INVALID_LOGON_HOURS",
1738 : "NT_STATUS_ACCOUNT_EXPIRED",
1739 : "NT_STATUS_ACCOUNT_DISABLED",
1740 : "NT_STATUS_ACCOUNT_LOCKED_OUT",
1741 : "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1742 : "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1743 : "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1744 : "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1745 : "NT_STATUS_NO_LOGON_SERVERS",
1746 : "NT_STATUS_WRONG_PASSWORD",
1747 : "NT_STATUS_ACCESS_DENIED"
1748 : };
1749 :
1750 248 : if (pwd_last_set) {
1751 12 : *pwd_last_set = 0;
1752 : }
1753 :
1754 : /* Krb5 auth always has to go against the KDC of the user's realm */
1755 :
1756 248 : if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1757 124 : flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
1758 : }
1759 :
1760 248 : if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1761 124 : struct passwd *pwd = NULL;
1762 :
1763 124 : pwd = getpwnam(user);
1764 124 : if (pwd == NULL) {
1765 0 : return PAM_USER_UNKNOWN;
1766 : }
1767 124 : user_uid = pwd->pw_uid;
1768 : }
1769 :
1770 248 : if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1771 :
1772 124 : _pam_log_debug(ctx, LOG_DEBUG,
1773 : "enabling krb5 login flag\n");
1774 :
1775 124 : flags |= WBFLAG_PAM_KRB5 |
1776 : WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1777 : }
1778 :
1779 248 : if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1780 0 : _pam_log_debug(ctx, LOG_DEBUG,
1781 : "enabling cached login flag\n");
1782 0 : flags |= WBFLAG_PAM_CACHED_LOGIN;
1783 : }
1784 :
1785 248 : if (user_ret) {
1786 236 : *user_ret = NULL;
1787 236 : flags |= WBFLAG_PAM_UNIX_NAME;
1788 : }
1789 :
1790 248 : if (cctype != NULL) {
1791 118 : _pam_log_debug(ctx, LOG_DEBUG,
1792 : "enabling request for a %s krb5 ccache\n",
1793 : cctype);
1794 : }
1795 :
1796 248 : if (member != NULL) {
1797 :
1798 0 : ZERO_STRUCT(membership_of);
1799 :
1800 0 : if (!winbind_name_list_to_sid_string_list(ctx, user, member,
1801 : membership_of,
1802 : sizeof(membership_of))) {
1803 0 : _pam_log_debug(ctx, LOG_ERR,
1804 : "failed to serialize membership of sid "
1805 : "\"%s\"\n", member);
1806 0 : return PAM_AUTH_ERR;
1807 : }
1808 : }
1809 :
1810 248 : ZERO_STRUCT(logon);
1811 :
1812 248 : logon.username = user;
1813 248 : logon.password = pass;
1814 :
1815 248 : if (cctype) {
1816 118 : wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1817 : &logon.blobs,
1818 : "krb5_cc_type",
1819 : 0,
1820 : discard_const_p(uint8_t, cctype),
1821 118 : strlen(cctype)+1);
1822 118 : if (!WBC_ERROR_IS_OK(wbc_status)) {
1823 0 : goto done;
1824 : }
1825 : }
1826 :
1827 248 : wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1828 : &logon.blobs,
1829 : "flags",
1830 : 0,
1831 : (uint8_t *)&flags,
1832 : sizeof(flags));
1833 248 : if (!WBC_ERROR_IS_OK(wbc_status)) {
1834 0 : goto done;
1835 : }
1836 :
1837 248 : wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1838 : &logon.blobs,
1839 : "user_uid",
1840 : 0,
1841 : (uint8_t *)&user_uid,
1842 : sizeof(user_uid));
1843 248 : if (!WBC_ERROR_IS_OK(wbc_status)) {
1844 0 : goto done;
1845 : }
1846 :
1847 248 : if (member) {
1848 0 : wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1849 : &logon.blobs,
1850 : "membership_of",
1851 : 0,
1852 : (uint8_t *)membership_of,
1853 : sizeof(membership_of));
1854 0 : if (!WBC_ERROR_IS_OK(wbc_status)) {
1855 0 : goto done;
1856 : }
1857 : }
1858 :
1859 248 : wbc_status = wbcCtxLogonUser(ctx->wbc_ctx,
1860 : &logon,
1861 : &info,
1862 : &error,
1863 : NULL);
1864 248 : ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1865 : user, "wbcLogonUser");
1866 248 : wbcFreeMemory(logon.blobs);
1867 248 : logon.blobs = NULL;
1868 :
1869 248 : if (info && info->info) {
1870 172 : user_info = info->info;
1871 : }
1872 :
1873 248 : if (pwd_last_set && user_info) {
1874 12 : *pwd_last_set = user_info->pass_last_set_time;
1875 : }
1876 :
1877 248 : if (p_info && info) {
1878 0 : *p_info = info;
1879 : }
1880 :
1881 248 : if (p_error && error) {
1882 : /* We want to process the error in the caller. */
1883 0 : *p_error = error;
1884 0 : return ret;
1885 : }
1886 :
1887 3616 : for (i=0; i<ARRAY_SIZE(codes); i++) {
1888 3420 : int _ret = ret;
1889 3420 : if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1890 52 : ret = _ret;
1891 52 : goto done;
1892 : }
1893 : }
1894 :
1895 368 : if ((ret == PAM_SUCCESS) && user_info && info) {
1896 :
1897 172 : bool already_expired = false;
1898 172 : bool change_pwd = false;
1899 :
1900 : /* warn a user if the password is about to expire soon */
1901 172 : _pam_warn_password_expiry(ctx, user_info,
1902 : warn_pwd_expire,
1903 : &already_expired,
1904 : &change_pwd);
1905 :
1906 172 : if (already_expired == true) {
1907 :
1908 0 : SMB_TIME_T last_set = user_info->pass_last_set_time;
1909 0 : SMB_TIME_T must_set = user_info->pass_must_change_time;
1910 :
1911 0 : _pam_log_debug(ctx, LOG_DEBUG,
1912 : "Password has expired "
1913 : "(Password was last set: %lld, "
1914 : "it must be changed here "
1915 : "%lld (now it's: %ld))\n",
1916 : (long long int)last_set,
1917 : (long long int)must_set,
1918 0 : (long)time(NULL));
1919 :
1920 0 : return PAM_AUTHTOK_EXPIRED;
1921 : }
1922 :
1923 172 : if (change_pwd) {
1924 0 : ret = PAM_NEW_AUTHTOK_REQD;
1925 0 : goto done;
1926 : }
1927 :
1928 : /* inform about logon type */
1929 172 : _pam_warn_logon_type(ctx, user, user_info->user_flags);
1930 :
1931 : /* inform about krb5 failures */
1932 172 : _pam_warn_krb5_failure(ctx, user, user_info->user_flags);
1933 :
1934 : /* set some info3 info for other modules in the stack */
1935 172 : _pam_set_data_info3(ctx, user_info);
1936 :
1937 : /* put krb5ccname into env */
1938 172 : _pam_setup_krb5_env(ctx, info);
1939 :
1940 : /* If winbindd returned a username, return the pointer to it
1941 : * here. */
1942 172 : _pam_setup_unix_username(ctx, user_ret, info);
1943 : }
1944 :
1945 148 : done:
1946 248 : wbcFreeMemory(logon.blobs);
1947 248 : if (info && info->blobs && !p_info) {
1948 160 : wbcFreeMemory(info->blobs);
1949 : /*
1950 : * We set blobs to NULL to prevent a use after free in the
1951 : * in the wbcLogonUserInfoDestructor
1952 : */
1953 160 : info->blobs = NULL;
1954 : }
1955 248 : if (error && !p_error) {
1956 76 : wbcFreeMemory(error);
1957 : }
1958 248 : if (info && !p_info) {
1959 172 : wbcFreeMemory(info);
1960 : }
1961 :
1962 248 : return ret;
1963 : }
1964 :
1965 : /* talk to winbindd */
1966 12 : static int winbind_chauthtok_request(struct pwb_context *ctx,
1967 : const char *user,
1968 : const char *oldpass,
1969 : const char *newpass,
1970 : time_t pwd_last_set)
1971 : {
1972 : wbcErr wbc_status;
1973 : struct wbcChangePasswordParams params;
1974 12 : struct wbcAuthErrorInfo *error = NULL;
1975 12 : struct wbcUserPasswordPolicyInfo *policy = NULL;
1976 12 : enum wbcPasswordChangeRejectReason reject_reason = -1;
1977 12 : uint32_t flags = 0;
1978 :
1979 : int i;
1980 12 : const char *codes[] = {
1981 : "NT_STATUS_BACKUP_CONTROLLER",
1982 : "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1983 : "NT_STATUS_NO_LOGON_SERVERS",
1984 : "NT_STATUS_ACCESS_DENIED",
1985 : "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1986 : "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1987 : "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1988 : };
1989 12 : int ret = PAM_AUTH_ERR;
1990 :
1991 12 : ZERO_STRUCT(params);
1992 :
1993 12 : if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1994 6 : flags |= WBFLAG_PAM_KRB5 |
1995 : WBFLAG_PAM_CONTACT_TRUSTDOM;
1996 : }
1997 :
1998 12 : if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1999 0 : flags |= WBFLAG_PAM_CACHED_LOGIN;
2000 : }
2001 :
2002 12 : params.account_name = user;
2003 12 : params.level = WBC_CHANGE_PASSWORD_LEVEL_PLAIN;
2004 12 : params.old_password.plaintext = oldpass;
2005 12 : params.new_password.plaintext = newpass;
2006 12 : params.flags = flags;
2007 :
2008 12 : wbc_status = wbcCtxChangeUserPasswordEx(ctx->wbc_ctx,
2009 : ¶ms,
2010 : &error,
2011 : &reject_reason,
2012 : &policy);
2013 12 : ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2014 : user, "wbcChangeUserPasswordEx");
2015 :
2016 12 : if (WBC_ERROR_IS_OK(wbc_status)) {
2017 12 : _pam_log(ctx, LOG_NOTICE,
2018 : "user '%s' password changed", user);
2019 12 : return PAM_SUCCESS;
2020 : }
2021 :
2022 0 : if (!error) {
2023 0 : wbcFreeMemory(policy);
2024 0 : return ret;
2025 : }
2026 :
2027 0 : for (i=0; i<ARRAY_SIZE(codes); i++) {
2028 0 : int _ret = ret;
2029 0 : if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
2030 0 : ret = _ret;
2031 0 : goto done;
2032 : }
2033 : }
2034 :
2035 0 : if (!strcasecmp(error->nt_string,
2036 : "NT_STATUS_PASSWORD_RESTRICTION")) {
2037 :
2038 0 : char *pwd_restriction_string = NULL;
2039 0 : SMB_TIME_T min_pwd_age = 0;
2040 :
2041 0 : if (policy) {
2042 0 : min_pwd_age = policy->min_passwordage;
2043 : }
2044 :
2045 : /* FIXME: avoid to send multiple PAM messages after another */
2046 0 : switch ((int)reject_reason) {
2047 0 : case -1:
2048 0 : break;
2049 0 : case WBC_PWD_CHANGE_NO_ERROR:
2050 0 : if ((min_pwd_age > 0) &&
2051 0 : (pwd_last_set + min_pwd_age > time(NULL))) {
2052 0 : time_t next_change = pwd_last_set + min_pwd_age;
2053 : #if defined(__clang__)
2054 : #pragma clang diagnostic push
2055 : #pragma clang diagnostic ignored "-Wformat-nonliteral"
2056 : #endif
2057 0 : _make_remark_format(ctx, PAM_ERROR_MSG,
2058 : _get_ntstatus_error_string("NT_STATUS_PWD_TOO_RECENT"),
2059 : ctime(&next_change));
2060 : #if defined(__clang__)
2061 : #pragma clang diagnostic pop
2062 : #endif
2063 0 : goto done;
2064 : }
2065 0 : break;
2066 0 : case WBC_PWD_CHANGE_PASSWORD_TOO_SHORT:
2067 0 : PAM_WB_REMARK_DIRECT(ctx,
2068 : "NT_STATUS_PWD_TOO_SHORT");
2069 0 : break;
2070 0 : case WBC_PWD_CHANGE_PWD_IN_HISTORY:
2071 0 : PAM_WB_REMARK_DIRECT(ctx,
2072 : "NT_STATUS_PWD_HISTORY_CONFLICT");
2073 0 : break;
2074 0 : case WBC_PWD_CHANGE_NOT_COMPLEX:
2075 0 : _make_remark(ctx, PAM_ERROR_MSG,
2076 0 : _("Password does not meet "
2077 : "complexity requirements"));
2078 0 : break;
2079 0 : default:
2080 0 : _pam_log_debug(ctx, LOG_DEBUG,
2081 : "unknown password change "
2082 : "reject reason: %d",
2083 : reject_reason);
2084 0 : break;
2085 : }
2086 :
2087 0 : pwd_restriction_string =
2088 0 : _pam_compose_pwd_restriction_string(ctx, policy);
2089 0 : if (pwd_restriction_string) {
2090 0 : _make_remark(ctx, PAM_ERROR_MSG,
2091 : pwd_restriction_string);
2092 0 : TALLOC_FREE(pwd_restriction_string);
2093 : }
2094 : }
2095 0 : done:
2096 0 : wbcFreeMemory(error);
2097 0 : wbcFreeMemory(policy);
2098 :
2099 0 : return ret;
2100 : }
2101 :
2102 : /*
2103 : * Checks if a user has an account
2104 : *
2105 : * return values:
2106 : * 1 = User not found
2107 : * 0 = OK
2108 : * -1 = System error
2109 : */
2110 24 : static int valid_user(struct pwb_context *ctx,
2111 : const char *user)
2112 : {
2113 : /* check not only if the user is available over NSS calls, also make
2114 : * sure it's really a winbind user, this is important when stacking PAM
2115 : * modules in the 'account' or 'password' facility. */
2116 :
2117 : wbcErr wbc_status;
2118 24 : struct passwd *pwd = NULL;
2119 24 : struct passwd *wb_pwd = NULL;
2120 :
2121 24 : pwd = getpwnam(user);
2122 24 : if (pwd == NULL) {
2123 0 : return 1;
2124 : }
2125 :
2126 24 : wbc_status = wbcCtxGetpwnam(ctx->wbc_ctx, user, &wb_pwd);
2127 24 : wbcFreeMemory(wb_pwd);
2128 24 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2129 0 : _pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
2130 : wbcErrorString(wbc_status));
2131 : }
2132 :
2133 24 : switch (wbc_status) {
2134 0 : case WBC_ERR_UNKNOWN_USER:
2135 : /* match other insane libwbclient return codes */
2136 : case WBC_ERR_WINBIND_NOT_AVAILABLE:
2137 : case WBC_ERR_DOMAIN_NOT_FOUND:
2138 0 : return 1;
2139 24 : case WBC_ERR_SUCCESS:
2140 24 : return 0;
2141 0 : default:
2142 0 : break;
2143 : }
2144 0 : return -1;
2145 : }
2146 :
2147 252 : static char *_pam_delete(register char *xx)
2148 : {
2149 1658 : _pam_overwrite(xx);
2150 252 : _pam_drop(xx);
2151 252 : return NULL;
2152 : }
2153 :
2154 : /*
2155 : * obtain a password from the user
2156 : */
2157 :
2158 260 : static int _winbind_read_password(struct pwb_context *ctx,
2159 : unsigned int ctrl,
2160 : const char *comment,
2161 : const char *prompt1,
2162 : const char *prompt2,
2163 : const char **pass)
2164 : {
2165 : int authtok_flag;
2166 : int retval;
2167 : const char *item;
2168 : char *token;
2169 :
2170 260 : _pam_log(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
2171 :
2172 : /*
2173 : * make sure nothing inappropriate gets returned
2174 : */
2175 :
2176 260 : *pass = token = NULL;
2177 :
2178 : /*
2179 : * which authentication token are we getting?
2180 : */
2181 :
2182 260 : if (on(WINBIND__OLD_PASSWORD, ctrl)) {
2183 12 : authtok_flag = PAM_OLDAUTHTOK;
2184 : } else {
2185 248 : authtok_flag = PAM_AUTHTOK;
2186 : }
2187 :
2188 : /*
2189 : * should we obtain the password from a PAM item ?
2190 : */
2191 :
2192 388 : if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
2193 256 : on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2194 8 : retval = pam_get_item(ctx->pamh,
2195 : authtok_flag,
2196 : (const void **) &item);
2197 8 : if (retval != PAM_SUCCESS) {
2198 : /* very strange. */
2199 0 : _pam_log(ctx, LOG_ALERT,
2200 : "pam_get_item returned error "
2201 : "to unix-read-password");
2202 0 : return retval;
2203 8 : } else if (item != NULL) { /* we have a password! */
2204 8 : *pass = item;
2205 8 : item = NULL;
2206 8 : _pam_log(ctx, LOG_DEBUG,
2207 : "pam_get_item returned a password");
2208 8 : return PAM_SUCCESS;
2209 0 : } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2210 0 : return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
2211 0 : } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
2212 0 : && off(WINBIND__OLD_PASSWORD, ctrl)) {
2213 0 : return PAM_AUTHTOK_RECOVER_ERR;
2214 : }
2215 : }
2216 : /*
2217 : * getting here implies we will have to get the password from the
2218 : * user directly.
2219 : */
2220 :
2221 : {
2222 : struct pam_message msg[3];
2223 : const struct pam_message *pmsg[3];
2224 : struct pam_response *resp;
2225 : int i, replies;
2226 :
2227 : /* prepare to converse */
2228 :
2229 252 : if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
2230 12 : pmsg[0] = &msg[0];
2231 12 : msg[0].msg_style = PAM_TEXT_INFO;
2232 12 : msg[0].msg = discard_const_p(char, comment);
2233 12 : i = 1;
2234 : } else {
2235 240 : i = 0;
2236 : }
2237 :
2238 252 : pmsg[i] = &msg[i];
2239 252 : msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2240 252 : msg[i++].msg = discard_const_p(char, prompt1);
2241 252 : replies = 1;
2242 :
2243 252 : if (prompt2 != NULL) {
2244 4 : pmsg[i] = &msg[i];
2245 4 : msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2246 4 : msg[i++].msg = discard_const_p(char, prompt2);
2247 4 : ++replies;
2248 : }
2249 : /* so call the conversation expecting i responses */
2250 252 : resp = NULL;
2251 252 : retval = converse(ctx->pamh, i, pmsg, &resp);
2252 252 : if (resp == NULL) {
2253 0 : if (retval == PAM_SUCCESS) {
2254 0 : retval = PAM_AUTHTOK_RECOVER_ERR;
2255 : }
2256 0 : goto done;
2257 : }
2258 252 : if (retval != PAM_SUCCESS) {
2259 0 : _pam_drop_reply(resp, i);
2260 0 : goto done;
2261 : }
2262 :
2263 : /* interpret the response */
2264 :
2265 252 : token = x_strdup(resp[i - replies].resp);
2266 252 : if (!token) {
2267 0 : _pam_log(ctx, LOG_NOTICE,
2268 : "could not recover "
2269 : "authentication token");
2270 0 : retval = PAM_AUTHTOK_RECOVER_ERR;
2271 0 : goto done;
2272 : }
2273 :
2274 252 : if (replies == 2) {
2275 : /* verify that password entered correctly */
2276 6 : if (!resp[i - 1].resp ||
2277 4 : strcmp(token, resp[i - 1].resp)) {
2278 0 : _pam_delete(token); /* mistyped */
2279 0 : retval = PAM_AUTHTOK_RECOVER_ERR;
2280 0 : _make_remark(ctx, PAM_ERROR_MSG,
2281 0 : MISTYPED_PASS);
2282 : }
2283 : }
2284 :
2285 : /*
2286 : * tidy up the conversation (resp_retcode) is ignored
2287 : * -- what is it for anyway? AGM
2288 : */
2289 2110 : _pam_drop_reply(resp, i);
2290 : }
2291 :
2292 252 : done:
2293 252 : if (retval != PAM_SUCCESS) {
2294 0 : _pam_log_debug(ctx, LOG_DEBUG,
2295 : "unable to obtain a password");
2296 0 : return retval;
2297 : }
2298 : /* 'token' is the entered password */
2299 :
2300 : /* we store this password as an item */
2301 :
2302 252 : retval = pam_set_item(ctx->pamh, authtok_flag, token);
2303 252 : _pam_delete(token); /* clean it up */
2304 504 : if (retval != PAM_SUCCESS ||
2305 252 : (retval = pam_get_item(ctx->pamh, authtok_flag, (const void **) &item)) != PAM_SUCCESS) {
2306 :
2307 0 : _pam_log(ctx, LOG_CRIT, "error manipulating password");
2308 0 : return retval;
2309 :
2310 : }
2311 :
2312 252 : *pass = item;
2313 252 : item = NULL; /* break link to password */
2314 :
2315 252 : return PAM_SUCCESS;
2316 : }
2317 :
2318 708 : static const char *get_conf_item_string(struct pwb_context *ctx,
2319 : const char *item,
2320 : int config_flag)
2321 : {
2322 708 : int i = 0;
2323 708 : const char *parm_opt = NULL;
2324 :
2325 708 : if (!(ctx->ctrl & config_flag)) {
2326 590 : goto out;
2327 : }
2328 :
2329 : /* let the pam opt take precedence over the pam_winbind.conf option */
2330 476 : for (i=0; i<ctx->argc; i++) {
2331 :
2332 476 : if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2333 : char *p;
2334 :
2335 118 : if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2336 0 : _pam_log(ctx, LOG_INFO,
2337 : "no \"=\" delimiter for \"%s\" found\n",
2338 : item);
2339 0 : goto out;
2340 : }
2341 118 : _pam_log_debug(ctx, LOG_INFO,
2342 : "PAM config: %s '%s'\n", item, p+1);
2343 118 : return p + 1;
2344 : }
2345 : }
2346 :
2347 0 : if (ctx->dict) {
2348 0 : char *key = NULL;
2349 :
2350 0 : key = talloc_asprintf(ctx, "global:%s", item);
2351 0 : if (!key) {
2352 0 : goto out;
2353 : }
2354 :
2355 0 : parm_opt = tiniparser_getstring_nonempty(ctx->dict, key, NULL);
2356 0 : TALLOC_FREE(key);
2357 :
2358 0 : _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
2359 : item, parm_opt);
2360 : }
2361 295 : out:
2362 590 : return parm_opt;
2363 : }
2364 :
2365 236 : static int get_config_item_int(struct pwb_context *ctx,
2366 : const char *item,
2367 : int config_flag)
2368 : {
2369 236 : int i, parm_opt = -1;
2370 :
2371 236 : if (!(ctx->ctrl & config_flag)) {
2372 228 : goto out;
2373 : }
2374 :
2375 : /* let the pam opt take precedence over the pam_winbind.conf option */
2376 24 : for (i = 0; i < ctx->argc; i++) {
2377 :
2378 24 : if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2379 : char *p;
2380 :
2381 8 : if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2382 0 : _pam_log(ctx, LOG_INFO,
2383 : "no \"=\" delimiter for \"%s\" found\n",
2384 : item);
2385 0 : goto out;
2386 : }
2387 8 : parm_opt = atoi(p + 1);
2388 8 : _pam_log_debug(ctx, LOG_INFO,
2389 : "PAM config: %s '%d'\n",
2390 : item, parm_opt);
2391 8 : return parm_opt;
2392 : }
2393 : }
2394 :
2395 0 : if (ctx->dict) {
2396 0 : char *key = NULL;
2397 :
2398 0 : key = talloc_asprintf(ctx, "global:%s", item);
2399 0 : if (!key) {
2400 0 : goto out;
2401 : }
2402 :
2403 0 : parm_opt = tiniparser_getint(ctx->dict, key, -1);
2404 0 : TALLOC_FREE(key);
2405 :
2406 0 : _pam_log_debug(ctx, LOG_INFO,
2407 : "CONFIG file: %s '%d'\n",
2408 : item, parm_opt);
2409 : }
2410 114 : out:
2411 228 : return parm_opt;
2412 : }
2413 :
2414 236 : static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
2415 : {
2416 236 : return get_conf_item_string(ctx, "krb5_ccache_type",
2417 : WINBIND_KRB5_CCACHE_TYPE);
2418 : }
2419 :
2420 236 : static const char *get_member_from_config(struct pwb_context *ctx)
2421 : {
2422 236 : const char *ret = NULL;
2423 236 : ret = get_conf_item_string(ctx, "require_membership_of",
2424 : WINBIND_REQUIRED_MEMBERSHIP);
2425 236 : if (ret != NULL) {
2426 0 : return ret;
2427 : }
2428 236 : return get_conf_item_string(ctx, "require-membership-of",
2429 : WINBIND_REQUIRED_MEMBERSHIP);
2430 : }
2431 :
2432 236 : static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
2433 : {
2434 : int ret;
2435 236 : ret = get_config_item_int(ctx, "warn_pwd_expire",
2436 : WINBIND_WARN_PWD_EXPIRE);
2437 : /* no or broken setting */
2438 236 : if (ret < 0) {
2439 228 : return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
2440 : }
2441 8 : return ret;
2442 : }
2443 :
2444 : /**
2445 : * Retrieve the winbind separator.
2446 : *
2447 : * @param ctx PAM winbind context.
2448 : *
2449 : * @return string separator character. NULL on failure.
2450 : */
2451 :
2452 144 : static char winbind_get_separator(struct pwb_context *ctx)
2453 : {
2454 : wbcErr wbc_status;
2455 : static struct wbcInterfaceDetails *details = NULL;
2456 :
2457 144 : wbc_status = wbcCtxInterfaceDetails(ctx->wbc_ctx, &details);
2458 144 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2459 0 : _pam_log(ctx, LOG_ERR,
2460 : "Could not retrieve winbind interface details: %s",
2461 : wbcErrorString(wbc_status));
2462 0 : return '\0';
2463 : }
2464 :
2465 144 : if (!details) {
2466 0 : return '\0';
2467 : }
2468 :
2469 144 : return details->winbind_separator;
2470 : }
2471 :
2472 :
2473 : /**
2474 : * Convert a upn to a name.
2475 : *
2476 : * @param ctx PAM winbind context.
2477 : * @param upn User UPN to be translated.
2478 : *
2479 : * @return converted name. NULL pointer on failure. Caller needs to free.
2480 : */
2481 :
2482 144 : static char* winbind_upn_to_username(struct pwb_context *ctx,
2483 : const char *upn)
2484 : {
2485 : char sep;
2486 144 : wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
2487 : struct wbcDomainSid sid;
2488 : enum wbcSidType type;
2489 144 : char *domain = NULL;
2490 : char *name;
2491 : char *p;
2492 : char *result;
2493 :
2494 : /* This cannot work when the winbind separator = @ */
2495 :
2496 144 : sep = winbind_get_separator(ctx);
2497 144 : if (!sep || sep == '@') {
2498 0 : return NULL;
2499 : }
2500 :
2501 144 : name = talloc_strdup(ctx, upn);
2502 144 : if (!name) {
2503 0 : return NULL;
2504 : }
2505 :
2506 144 : p = strchr(name, '@');
2507 144 : if (p == NULL) {
2508 0 : TALLOC_FREE(name);
2509 0 : return NULL;
2510 : }
2511 144 : *p = '\0';
2512 144 : domain = p + 1;
2513 :
2514 : /* Convert the UPN to a SID */
2515 :
2516 144 : wbc_status = wbcCtxLookupName(ctx->wbc_ctx, domain, name, &sid, &type);
2517 144 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2518 72 : return NULL;
2519 : }
2520 :
2521 : /* Convert the the SID back to the sAMAccountName */
2522 :
2523 72 : wbc_status = wbcCtxLookupSid(ctx->wbc_ctx, &sid, &domain, &name, &type);
2524 72 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2525 0 : return NULL;
2526 : }
2527 :
2528 72 : result = talloc_asprintf(ctx, "%s%c%s", domain, sep, name);
2529 72 : wbcFreeMemory(domain);
2530 72 : wbcFreeMemory(name);
2531 72 : return result;
2532 : }
2533 :
2534 0 : static int _pam_delete_cred(pam_handle_t *pamh, int flags,
2535 : int argc, enum pam_winbind_request_type type,
2536 : const char **argv)
2537 : {
2538 0 : int retval = PAM_SUCCESS;
2539 0 : struct pwb_context *ctx = NULL;
2540 : struct wbcLogoffUserParams logoff;
2541 0 : struct wbcAuthErrorInfo *error = NULL;
2542 : const char *user;
2543 0 : wbcErr wbc_status = WBC_ERR_SUCCESS;
2544 :
2545 0 : ZERO_STRUCT(logoff);
2546 :
2547 0 : retval = _pam_winbind_init_context(pamh, flags, argc, argv, type, &ctx);
2548 0 : if (retval != PAM_SUCCESS) {
2549 0 : return retval;
2550 : }
2551 :
2552 0 : _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
2553 :
2554 0 : if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2555 :
2556 : /* destroy the ccache here */
2557 :
2558 0 : uint32_t wbc_flags = 0;
2559 0 : const char *ccname = NULL;
2560 0 : struct passwd *pwd = NULL;
2561 :
2562 0 : retval = pam_get_user(pamh, &user, _("Username: "));
2563 0 : if (retval != PAM_SUCCESS) {
2564 0 : _pam_log(ctx, LOG_ERR,
2565 : "could not identify user");
2566 0 : goto out;
2567 : }
2568 :
2569 0 : if (user == NULL) {
2570 0 : _pam_log(ctx, LOG_ERR,
2571 : "username was NULL!");
2572 0 : retval = PAM_USER_UNKNOWN;
2573 0 : goto out;
2574 : }
2575 :
2576 0 : _pam_log_debug(ctx, LOG_DEBUG,
2577 : "username [%s] obtained", user);
2578 :
2579 0 : ccname = pam_getenv(pamh, "KRB5CCNAME");
2580 0 : if (ccname == NULL) {
2581 0 : _pam_log_debug(ctx, LOG_DEBUG,
2582 : "user has no KRB5CCNAME environment");
2583 : }
2584 :
2585 0 : pwd = getpwnam(user);
2586 0 : if (pwd == NULL) {
2587 0 : retval = PAM_USER_UNKNOWN;
2588 0 : goto out;
2589 : }
2590 :
2591 0 : wbc_flags = WBFLAG_PAM_KRB5 |
2592 : WBFLAG_PAM_CONTACT_TRUSTDOM;
2593 :
2594 0 : logoff.username = user;
2595 :
2596 0 : if (ccname) {
2597 0 : wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2598 : &logoff.blobs,
2599 : "ccfilename",
2600 : 0,
2601 : discard_const_p(uint8_t, ccname),
2602 0 : strlen(ccname)+1);
2603 0 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2604 0 : goto out;
2605 : }
2606 : }
2607 :
2608 0 : wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2609 : &logoff.blobs,
2610 : "flags",
2611 : 0,
2612 : (uint8_t *)&wbc_flags,
2613 : sizeof(wbc_flags));
2614 0 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2615 0 : goto out;
2616 : }
2617 :
2618 0 : wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2619 : &logoff.blobs,
2620 : "user_uid",
2621 : 0,
2622 0 : (uint8_t *)&pwd->pw_uid,
2623 : sizeof(pwd->pw_uid));
2624 0 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2625 0 : goto out;
2626 : }
2627 :
2628 0 : wbc_status = wbcCtxLogoffUserEx(ctx->wbc_ctx, &logoff, &error);
2629 0 : retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2630 : user, "wbcLogoffUser");
2631 0 : wbcFreeMemory(logoff.blobs);
2632 0 : logoff.blobs = NULL;
2633 :
2634 0 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2635 0 : _pam_log(ctx, LOG_INFO,
2636 : "failed to logoff user %s: %s\n",
2637 : user, wbcErrorString(wbc_status));
2638 : }
2639 : }
2640 :
2641 0 : out:
2642 0 : if (logoff.blobs) {
2643 0 : wbcFreeMemory(logoff.blobs);
2644 : }
2645 :
2646 0 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2647 0 : retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2648 : user, "wbcLogoffUser");
2649 : }
2650 0 : wbcFreeMemory(error);
2651 :
2652 : /*
2653 : * Delete the krb5 ccname variable from the PAM environment
2654 : * if it was set by winbind.
2655 : */
2656 0 : if ((ctx->ctrl & WINBIND_KRB5_AUTH) && pam_getenv(pamh, "KRB5CCNAME")) {
2657 0 : pam_putenv(pamh, "KRB5CCNAME");
2658 : }
2659 :
2660 0 : _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx, retval);
2661 :
2662 0 : TALLOC_FREE(ctx);
2663 :
2664 0 : return retval;
2665 : }
2666 :
2667 : #ifdef SECURITY_OPENPAM_H_INCLUDED
2668 : /*
2669 : * Logic below is copied from openpam_check_error_code() in
2670 : *./contrib/openpam/lib/libpam/openpam_dispatch.c on FreeBSD.
2671 : */
2672 : static int openpam_convert_error_code(struct pwb_context *ctx,
2673 : enum pam_winbind_request_type req,
2674 : int r)
2675 : {
2676 : if (r == PAM_SUCCESS ||
2677 : r == PAM_SYSTEM_ERR ||
2678 : r == PAM_SERVICE_ERR ||
2679 : r == PAM_BUF_ERR ||
2680 : r == PAM_CONV_ERR ||
2681 : r == PAM_PERM_DENIED ||
2682 : r == PAM_ABORT) {
2683 : return r;
2684 : }
2685 :
2686 : /* specific winbind request types */
2687 : switch (req) {
2688 : case PAM_WINBIND_AUTHENTICATE:
2689 : if (r == PAM_AUTH_ERR ||
2690 : r == PAM_CRED_INSUFFICIENT ||
2691 : r == PAM_AUTHINFO_UNAVAIL ||
2692 : r == PAM_USER_UNKNOWN ||
2693 : r == PAM_MAXTRIES) {
2694 : return r;
2695 : }
2696 : break;
2697 : case PAM_WINBIND_SETCRED:
2698 : if (r == PAM_CRED_UNAVAIL ||
2699 : r == PAM_CRED_EXPIRED ||
2700 : r == PAM_USER_UNKNOWN ||
2701 : r == PAM_CRED_ERR) {
2702 : return r;
2703 : }
2704 : break;
2705 : case PAM_WINBIND_ACCT_MGMT:
2706 : if (r == PAM_USER_UNKNOWN ||
2707 : r == PAM_AUTH_ERR ||
2708 : r == PAM_NEW_AUTHTOK_REQD ||
2709 : r == PAM_ACCT_EXPIRED) {
2710 : return r;
2711 : }
2712 : break;
2713 : case PAM_WINBIND_OPEN_SESSION:
2714 : case PAM_WINBIND_CLOSE_SESSION:
2715 : if (r == PAM_SESSION_ERR) {
2716 : return r;
2717 : }
2718 : break;
2719 : case PAM_WINBIND_CHAUTHTOK:
2720 : if (r == PAM_PERM_DENIED ||
2721 : r == PAM_AUTHTOK_ERR ||
2722 : r == PAM_AUTHTOK_RECOVERY_ERR ||
2723 : r == PAM_AUTHTOK_LOCK_BUSY ||
2724 : r == PAM_AUTHTOK_DISABLE_AGING ||
2725 : r == PAM_TRY_AGAIN) {
2726 : return r;
2727 : }
2728 : break;
2729 : default:
2730 : break;
2731 : }
2732 : _pam_log(ctx, LOG_INFO,
2733 : "Converting PAM error [%d] to PAM_SERVICE_ERR.\n", r);
2734 : return PAM_SERVICE_ERR;
2735 : };
2736 : #define pam_error_code(a, b, c) openpam_convert_error_code(a, b, c)
2737 : #else
2738 : #define pam_error_code(a, b, c) (c)
2739 : #endif
2740 :
2741 : PAM_EXTERN
2742 : int pam_sm_authenticate(pam_handle_t *pamh, int flags,
2743 : int argc, const char **argv)
2744 : {
2745 : const char *username;
2746 : const char *password;
2747 236 : const char *member = NULL;
2748 236 : const char *cctype = NULL;
2749 : int warn_pwd_expire;
2750 236 : int retval = PAM_AUTH_ERR;
2751 236 : char *username_ret = NULL;
2752 236 : char *new_authtok_required = NULL;
2753 236 : char *real_username = NULL;
2754 236 : struct pwb_context *ctx = NULL;
2755 :
2756 236 : retval = _pam_winbind_init_context(pamh, flags, argc, argv,
2757 : PAM_WINBIND_AUTHENTICATE, &ctx);
2758 236 : if (retval != PAM_SUCCESS) {
2759 0 : return retval;
2760 : }
2761 :
2762 236 : _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
2763 :
2764 : /* Get the username */
2765 236 : retval = pam_get_user(pamh, &username, NULL);
2766 236 : if ((retval != PAM_SUCCESS) || (!username)) {
2767 0 : _pam_log_debug(ctx, LOG_DEBUG,
2768 : "can not get the username");
2769 0 : retval = PAM_SERVICE_ERR;
2770 0 : goto out;
2771 : }
2772 :
2773 :
2774 : #if defined(AIX)
2775 : /* Decode the user name since AIX does not support logn user
2776 : names by default. The name is encoded as _#uid. */
2777 :
2778 : if (username[0] == '_') {
2779 : uid_t id = atoi(&username[1]);
2780 : struct passwd *pw = NULL;
2781 :
2782 : if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
2783 : real_username = strdup(pw->pw_name);
2784 : }
2785 : }
2786 : #endif
2787 :
2788 236 : if (!real_username) {
2789 : /* Just making a copy of the username we got from PAM */
2790 236 : if ((real_username = strdup(username)) == NULL) {
2791 0 : _pam_log_debug(ctx, LOG_DEBUG,
2792 : "memory allocation failure when copying "
2793 : "username");
2794 0 : retval = PAM_SERVICE_ERR;
2795 0 : goto out;
2796 : }
2797 : }
2798 :
2799 : /* Maybe this was a UPN */
2800 :
2801 236 : if (strchr(real_username, '@') != NULL) {
2802 144 : char *samaccountname = NULL;
2803 :
2804 144 : samaccountname = winbind_upn_to_username(ctx,
2805 : real_username);
2806 144 : if (samaccountname) {
2807 72 : free(real_username);
2808 72 : real_username = strdup(samaccountname);
2809 : }
2810 : }
2811 :
2812 236 : retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
2813 236 : _("Password: "), NULL,
2814 : &password);
2815 :
2816 236 : if (retval != PAM_SUCCESS) {
2817 0 : _pam_log(ctx, LOG_ERR,
2818 : "Could not retrieve user's password");
2819 0 : retval = PAM_AUTHTOK_ERR;
2820 0 : goto out;
2821 : }
2822 :
2823 : /* Let's not give too much away in the log file */
2824 :
2825 : #ifdef DEBUG_PASSWORD
2826 236 : _pam_log_debug(ctx, LOG_INFO,
2827 : "Verify user '%s' with password '%s'",
2828 : real_username, password);
2829 : #else
2830 : _pam_log_debug(ctx, LOG_INFO,
2831 : "Verify user '%s'", real_username);
2832 : #endif
2833 :
2834 236 : member = get_member_from_config(ctx);
2835 236 : cctype = get_krb5_cc_type_from_config(ctx);
2836 236 : warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2837 :
2838 : /* Now use the username to look up password */
2839 236 : retval = winbind_auth_request(ctx, real_username, password,
2840 : member, cctype, warn_pwd_expire,
2841 : NULL, NULL, NULL, &username_ret);
2842 :
2843 236 : if (retval == PAM_NEW_AUTHTOK_REQD ||
2844 : retval == PAM_AUTHTOK_EXPIRED) {
2845 :
2846 0 : char *new_authtok_required_during_auth = NULL;
2847 :
2848 0 : new_authtok_required = talloc_asprintf(NULL, "%d", retval);
2849 0 : if (!new_authtok_required) {
2850 0 : retval = PAM_BUF_ERR;
2851 0 : goto out;
2852 : }
2853 :
2854 0 : pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2855 : new_authtok_required,
2856 : _pam_winbind_cleanup_func);
2857 :
2858 0 : retval = PAM_SUCCESS;
2859 :
2860 0 : new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
2861 0 : if (!new_authtok_required_during_auth) {
2862 0 : retval = PAM_BUF_ERR;
2863 0 : goto out;
2864 : }
2865 :
2866 0 : pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2867 : new_authtok_required_during_auth,
2868 : _pam_winbind_cleanup_func);
2869 :
2870 0 : goto out;
2871 : }
2872 :
2873 354 : out:
2874 236 : if (username_ret) {
2875 160 : pam_set_item (pamh, PAM_USER, username_ret);
2876 160 : _pam_log_debug(ctx, LOG_INFO,
2877 : "Returned user was '%s'", username_ret);
2878 160 : free(username_ret);
2879 : }
2880 :
2881 236 : if (real_username) {
2882 236 : free(real_username);
2883 : }
2884 :
2885 236 : if (!new_authtok_required) {
2886 236 : pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2887 : }
2888 :
2889 236 : if (retval != PAM_SUCCESS) {
2890 76 : _pam_free_data_info3(pamh);
2891 : }
2892 :
2893 236 : _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
2894 :
2895 236 : TALLOC_FREE(ctx);
2896 :
2897 236 : return retval;
2898 : }
2899 :
2900 : PAM_EXTERN
2901 : int pam_sm_setcred(pam_handle_t *pamh, int flags,
2902 : int argc, const char **argv)
2903 : {
2904 0 : int ret = PAM_SYSTEM_ERR;
2905 0 : struct pwb_context *ctx = NULL;
2906 :
2907 0 : ret = _pam_winbind_init_context(pamh, flags, argc, argv,
2908 : PAM_WINBIND_SETCRED, &ctx);
2909 0 : if (ret != PAM_SUCCESS) {
2910 0 : return ret;
2911 : }
2912 :
2913 0 : _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
2914 :
2915 0 : switch (flags & ~PAM_SILENT) {
2916 :
2917 0 : case PAM_DELETE_CRED:
2918 0 : ret = _pam_delete_cred(pamh, flags, argc,
2919 : PAM_WINBIND_SETCRED, argv);
2920 0 : break;
2921 0 : case PAM_REFRESH_CRED:
2922 0 : _pam_log_debug(ctx, LOG_WARNING,
2923 : "PAM_REFRESH_CRED not implemented");
2924 0 : ret = PAM_SUCCESS;
2925 0 : break;
2926 0 : case PAM_REINITIALIZE_CRED:
2927 0 : _pam_log_debug(ctx, LOG_WARNING,
2928 : "PAM_REINITIALIZE_CRED not implemented");
2929 0 : ret = PAM_SUCCESS;
2930 0 : break;
2931 0 : case PAM_ESTABLISH_CRED:
2932 0 : _pam_log_debug(ctx, LOG_WARNING,
2933 : "PAM_ESTABLISH_CRED not implemented");
2934 0 : ret = PAM_SUCCESS;
2935 0 : break;
2936 0 : default:
2937 0 : ret = PAM_SYSTEM_ERR;
2938 0 : break;
2939 : }
2940 :
2941 0 : _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
2942 :
2943 0 : TALLOC_FREE(ctx);
2944 :
2945 0 : return pam_error_code(ctx, PAM_WINBIND_SETCRED, ret);
2946 : }
2947 :
2948 : /*
2949 : * Account management. We want to verify that the account exists
2950 : * before returning PAM_SUCCESS
2951 : */
2952 : PAM_EXTERN
2953 : int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2954 : int argc, const char **argv)
2955 : {
2956 : const char *username;
2957 0 : int ret = PAM_USER_UNKNOWN;
2958 0 : const char *tmp = NULL;
2959 0 : struct pwb_context *ctx = NULL;
2960 :
2961 0 : ret = _pam_winbind_init_context(pamh, flags, argc, argv,
2962 : PAM_WINBIND_ACCT_MGMT, &ctx);
2963 0 : if (ret != PAM_SUCCESS) {
2964 0 : return ret;
2965 : }
2966 :
2967 0 : _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
2968 :
2969 :
2970 : /* Get the username */
2971 0 : ret = pam_get_user(pamh, &username, NULL);
2972 0 : if ((ret != PAM_SUCCESS) || (!username)) {
2973 0 : _pam_log_debug(ctx, LOG_DEBUG,
2974 : "can not get the username");
2975 0 : ret = PAM_SERVICE_ERR;
2976 0 : goto out;
2977 : }
2978 :
2979 : /* Verify the username */
2980 0 : ret = valid_user(ctx, username);
2981 0 : switch (ret) {
2982 0 : case -1:
2983 : /* some sort of system error. The log was already printed */
2984 0 : ret = PAM_SERVICE_ERR;
2985 0 : goto out;
2986 0 : case 1:
2987 : /* the user does not exist */
2988 0 : _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
2989 : username);
2990 0 : if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
2991 0 : ret = PAM_IGNORE;
2992 0 : goto out;
2993 : }
2994 0 : ret = PAM_USER_UNKNOWN;
2995 0 : goto out;
2996 0 : case 0:
2997 0 : pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2998 : (const void **)&tmp);
2999 0 : if (tmp != NULL) {
3000 0 : ret = atoi(tmp);
3001 0 : switch (ret) {
3002 0 : case PAM_AUTHTOK_EXPIRED:
3003 : /* Since new token is required in this case */
3004 : FALL_THROUGH;
3005 : case PAM_NEW_AUTHTOK_REQD:
3006 0 : _pam_log(ctx, LOG_WARNING,
3007 : "pam_sm_acct_mgmt success but %s is set",
3008 : PAM_WINBIND_NEW_AUTHTOK_REQD);
3009 0 : _pam_log(ctx, LOG_NOTICE,
3010 : "user '%s' needs new password",
3011 : username);
3012 : /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
3013 0 : ret = PAM_NEW_AUTHTOK_REQD;
3014 0 : goto out;
3015 0 : default:
3016 0 : _pam_log(ctx, LOG_WARNING,
3017 : "pam_sm_acct_mgmt success");
3018 0 : _pam_log(ctx, LOG_NOTICE,
3019 : "user '%s' granted access", username);
3020 0 : ret = PAM_SUCCESS;
3021 0 : goto out;
3022 : }
3023 : }
3024 :
3025 : /* Otherwise, the authentication looked good */
3026 0 : _pam_log(ctx, LOG_NOTICE,
3027 : "user '%s' granted access", username);
3028 0 : ret = PAM_SUCCESS;
3029 0 : goto out;
3030 0 : default:
3031 : /* we don't know anything about this return value */
3032 0 : _pam_log(ctx, LOG_ERR,
3033 : "internal module error (ret = %d, user = '%s')",
3034 : ret, username);
3035 0 : ret = PAM_SERVICE_ERR;
3036 0 : goto out;
3037 : }
3038 :
3039 : /* should not be reached */
3040 : ret = PAM_IGNORE;
3041 :
3042 0 : out:
3043 :
3044 0 : _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
3045 :
3046 0 : TALLOC_FREE(ctx);
3047 :
3048 0 : return pam_error_code(ctx, PAM_WINBIND_ACCT_MGMT, ret);
3049 : }
3050 :
3051 : PAM_EXTERN
3052 : int pam_sm_open_session(pam_handle_t *pamh, int flags,
3053 : int argc, const char **argv)
3054 : {
3055 0 : int ret = PAM_SUCCESS;
3056 0 : struct pwb_context *ctx = NULL;
3057 :
3058 0 : ret = _pam_winbind_init_context(pamh, flags, argc, argv,
3059 : PAM_WINBIND_OPEN_SESSION, &ctx);
3060 0 : if (ret != PAM_SUCCESS) {
3061 0 : return ret;
3062 : }
3063 :
3064 0 : _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
3065 :
3066 0 : if (ctx->ctrl & WINBIND_MKHOMEDIR) {
3067 : /* check and create homedir */
3068 0 : ret = _pam_mkhomedir(ctx);
3069 : }
3070 :
3071 0 : _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
3072 :
3073 0 : TALLOC_FREE(ctx);
3074 :
3075 0 : return pam_error_code(ctx, PAM_WINBIND_OPEN_SESSION, ret);
3076 : }
3077 :
3078 : PAM_EXTERN
3079 : int pam_sm_close_session(pam_handle_t *pamh, int flags,
3080 : int argc, const char **argv)
3081 : {
3082 0 : int ret = PAM_SUCCESS;
3083 0 : struct pwb_context *ctx = NULL;
3084 :
3085 0 : ret = _pam_winbind_init_context(pamh, flags, argc, argv,
3086 : PAM_WINBIND_CLOSE_SESSION, &ctx);
3087 0 : if (ret != PAM_SUCCESS) {
3088 0 : return ret;
3089 : }
3090 :
3091 0 : _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
3092 :
3093 0 : _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
3094 :
3095 0 : TALLOC_FREE(ctx);
3096 :
3097 0 : return pam_error_code(ctx, PAM_WINBIND_CLOSE_SESSION, ret);
3098 : }
3099 :
3100 : /**
3101 : * evaluate whether we need to re-authenticate with kerberos after a
3102 : * password change
3103 : *
3104 : * @param ctx PAM winbind context.
3105 : * @param user The username
3106 : *
3107 : * @return boolean Returns true if required, false if not.
3108 : */
3109 :
3110 12 : static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
3111 : const char *user)
3112 : {
3113 :
3114 : /* Make sure that we only do this if a) the chauthtok got initiated
3115 : * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
3116 : * later password change via the "passwd" command if done by the user
3117 : * itself
3118 : * NB. If we login from gdm or xdm and the password expires,
3119 : * we change the password, but there is no memory cache.
3120 : * Thus, even for passthrough login, we should do the
3121 : * authentication again to update memory cache.
3122 : * --- BoYang
3123 : * */
3124 :
3125 12 : const char *new_authtok_reqd_during_auth = NULL;
3126 12 : struct passwd *pwd = NULL;
3127 :
3128 12 : pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
3129 : (const void **) &new_authtok_reqd_during_auth);
3130 12 : pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
3131 : NULL, NULL);
3132 :
3133 12 : if (new_authtok_reqd_during_auth) {
3134 0 : return true;
3135 : }
3136 :
3137 12 : pwd = getpwnam(user);
3138 12 : if (!pwd) {
3139 0 : return false;
3140 : }
3141 :
3142 12 : if (getuid() == pwd->pw_uid) {
3143 0 : return true;
3144 : }
3145 :
3146 12 : return false;
3147 : }
3148 :
3149 :
3150 : PAM_EXTERN
3151 : int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
3152 : int argc, const char **argv)
3153 : {
3154 : unsigned int lctrl;
3155 : int ret;
3156 24 : bool cached_login = false;
3157 :
3158 : /* <DO NOT free() THESE> */
3159 : const char *user;
3160 : const char *pass_old;
3161 : const char *pass_new;
3162 : /* </DO NOT free() THESE> */
3163 :
3164 : char *Announce;
3165 :
3166 24 : int retry = 0;
3167 24 : char *username_ret = NULL;
3168 24 : struct wbcAuthErrorInfo *error = NULL;
3169 24 : struct pwb_context *ctx = NULL;
3170 :
3171 24 : ret = _pam_winbind_init_context(pamh, flags, argc, argv,
3172 : PAM_WINBIND_CHAUTHTOK, &ctx);
3173 24 : if (ret != PAM_SUCCESS) {
3174 0 : return ret;
3175 : }
3176 :
3177 24 : _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
3178 :
3179 24 : cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
3180 :
3181 : /* clearing offline bit for auth */
3182 24 : ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
3183 :
3184 : /*
3185 : * First get the name of a user
3186 : */
3187 24 : ret = pam_get_user(pamh, &user, _("Username: "));
3188 24 : if (ret != PAM_SUCCESS) {
3189 0 : _pam_log(ctx, LOG_ERR,
3190 : "password - could not identify user");
3191 0 : goto out;
3192 : }
3193 :
3194 24 : if (user == NULL) {
3195 0 : _pam_log(ctx, LOG_ERR, "username was NULL!");
3196 0 : ret = PAM_USER_UNKNOWN;
3197 0 : goto out;
3198 : }
3199 :
3200 24 : _pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
3201 :
3202 : /* check if this is really a user in winbindd, not only in NSS */
3203 24 : ret = valid_user(ctx, user);
3204 24 : switch (ret) {
3205 0 : case 1:
3206 0 : ret = PAM_USER_UNKNOWN;
3207 0 : goto out;
3208 0 : case -1:
3209 0 : ret = PAM_SYSTEM_ERR;
3210 0 : goto out;
3211 24 : default:
3212 24 : break;
3213 : }
3214 :
3215 : /*
3216 : * obtain and verify the current password (OLDAUTHTOK) for
3217 : * the user.
3218 : */
3219 :
3220 24 : if (flags & PAM_PRELIM_CHECK) {
3221 12 : time_t pwdlastset_prelim = 0;
3222 :
3223 : /* instruct user what is happening */
3224 :
3225 : #define greeting _("Changing password for")
3226 12 : Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
3227 12 : if (!Announce) {
3228 0 : _pam_log(ctx, LOG_CRIT,
3229 : "password - out of memory");
3230 0 : ret = PAM_BUF_ERR;
3231 0 : goto out;
3232 : }
3233 : #undef greeting
3234 :
3235 12 : lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
3236 12 : ret = _winbind_read_password(ctx, lctrl,
3237 : Announce,
3238 12 : _("(current) NT password: "),
3239 : NULL,
3240 : (const char **) &pass_old);
3241 12 : TALLOC_FREE(Announce);
3242 12 : if (ret != PAM_SUCCESS) {
3243 0 : _pam_log(ctx, LOG_NOTICE,
3244 : "password - (old) token not obtained");
3245 0 : goto out;
3246 : }
3247 :
3248 : /* verify that this is the password for this user */
3249 :
3250 12 : ret = winbind_auth_request(ctx, user, pass_old,
3251 : NULL, NULL, 0,
3252 : &error, NULL,
3253 : &pwdlastset_prelim, NULL);
3254 :
3255 12 : if (ret != PAM_ACCT_EXPIRED &&
3256 12 : ret != PAM_AUTHTOK_EXPIRED &&
3257 12 : ret != PAM_NEW_AUTHTOK_REQD &&
3258 : ret != PAM_SUCCESS) {
3259 0 : pass_old = NULL;
3260 0 : goto out;
3261 : }
3262 :
3263 12 : pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3264 : (void *)pwdlastset_prelim, NULL);
3265 :
3266 12 : ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
3267 : (const void *) pass_old);
3268 12 : pass_old = NULL;
3269 12 : if (ret != PAM_SUCCESS) {
3270 0 : _pam_log(ctx, LOG_CRIT,
3271 : "failed to set PAM_OLDAUTHTOK");
3272 : }
3273 12 : } else if (flags & PAM_UPDATE_AUTHTOK) {
3274 :
3275 12 : time_t pwdlastset_update = 0;
3276 :
3277 : /*
3278 : * obtain the proposed password
3279 : */
3280 :
3281 : /*
3282 : * get the old token back.
3283 : */
3284 :
3285 12 : ret = pam_get_item(pamh, PAM_OLDAUTHTOK, (const void **) &pass_old);
3286 :
3287 12 : if (ret != PAM_SUCCESS) {
3288 0 : _pam_log(ctx, LOG_NOTICE,
3289 : "user not authenticated");
3290 0 : goto out;
3291 : }
3292 :
3293 12 : lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
3294 :
3295 12 : if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
3296 4 : lctrl |= WINBIND_USE_FIRST_PASS_ARG;
3297 : }
3298 12 : if (on(WINBIND_TRY_AUTHTOK_ARG, lctrl)) {
3299 4 : lctrl |= WINBIND_TRY_FIRST_PASS_ARG;
3300 : }
3301 12 : retry = 0;
3302 12 : ret = PAM_AUTHTOK_ERR;
3303 30 : while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
3304 : /*
3305 : * use_authtok is to force the use of a previously entered
3306 : * password -- needed for pluggable password strength checking
3307 : */
3308 :
3309 12 : ret = _winbind_read_password(ctx, lctrl,
3310 : NULL,
3311 12 : _("Enter new NT password: "),
3312 12 : _("Retype new NT password: "),
3313 : (const char **)&pass_new);
3314 :
3315 12 : if (ret != PAM_SUCCESS) {
3316 0 : _pam_log_debug(ctx, LOG_ALERT,
3317 : "password - "
3318 : "new password not obtained");
3319 0 : pass_old = NULL;/* tidy up */
3320 0 : goto out;
3321 : }
3322 :
3323 : /*
3324 : * At this point we know who the user is and what they
3325 : * propose as their new password. Verify that the new
3326 : * password is acceptable.
3327 : */
3328 :
3329 12 : if (pass_new[0] == '\0') {/* "\0" password = NULL */
3330 0 : pass_new = NULL;
3331 : }
3332 : }
3333 :
3334 : /*
3335 : * By reaching here we have approved the passwords and must now
3336 : * rebuild the password database file.
3337 : */
3338 12 : pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3339 : (const void **) &pwdlastset_update);
3340 :
3341 : /*
3342 : * if cached creds were enabled, make sure to set the
3343 : * WINBIND_CACHED_LOGIN bit here in order to have winbindd
3344 : * update the cached creds storage - gd
3345 : */
3346 12 : if (cached_login) {
3347 0 : ctx->ctrl |= WINBIND_CACHED_LOGIN;
3348 : }
3349 :
3350 12 : ret = winbind_chauthtok_request(ctx, user, pass_old,
3351 : pass_new, pwdlastset_update);
3352 12 : if (ret != PAM_SUCCESS) {
3353 0 : pass_old = pass_new = NULL;
3354 0 : goto out;
3355 : }
3356 :
3357 12 : if (_pam_require_krb5_auth_after_chauthtok(ctx, user)) {
3358 :
3359 0 : const char *member = NULL;
3360 0 : const char *cctype = NULL;
3361 : int warn_pwd_expire;
3362 0 : struct wbcLogonUserInfo *info = NULL;
3363 :
3364 0 : member = get_member_from_config(ctx);
3365 0 : cctype = get_krb5_cc_type_from_config(ctx);
3366 0 : warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
3367 :
3368 : /* Keep WINBIND_CACHED_LOGIN bit for
3369 : * authentication after changing the password.
3370 : * This will update the cached credentials in case
3371 : * that winbindd_dual_pam_chauthtok() fails
3372 : * to update them.
3373 : * --- BoYang
3374 : * */
3375 :
3376 0 : ret = winbind_auth_request(ctx, user, pass_new,
3377 : member, cctype, 0,
3378 : &error, &info,
3379 : NULL, &username_ret);
3380 0 : pass_old = pass_new = NULL;
3381 :
3382 0 : if (ret == PAM_SUCCESS) {
3383 :
3384 0 : struct wbcAuthUserInfo *user_info = NULL;
3385 :
3386 0 : if (info && info->info) {
3387 0 : user_info = info->info;
3388 : }
3389 :
3390 : /* warn a user if the password is about to
3391 : * expire soon */
3392 0 : _pam_warn_password_expiry(ctx, user_info,
3393 : warn_pwd_expire,
3394 : NULL, NULL);
3395 :
3396 : /* set some info3 info for other modules in the
3397 : * stack */
3398 0 : _pam_set_data_info3(ctx, user_info);
3399 :
3400 : /* put krb5ccname into env */
3401 0 : _pam_setup_krb5_env(ctx, info);
3402 :
3403 0 : if (username_ret) {
3404 0 : pam_set_item(pamh, PAM_USER,
3405 : username_ret);
3406 0 : _pam_log_debug(ctx, LOG_INFO,
3407 : "Returned user was '%s'",
3408 : username_ret);
3409 0 : free(username_ret);
3410 : }
3411 :
3412 : }
3413 :
3414 0 : if (info && info->blobs) {
3415 0 : wbcFreeMemory(info->blobs);
3416 : }
3417 0 : wbcFreeMemory(info);
3418 :
3419 0 : goto out;
3420 : }
3421 : } else {
3422 0 : ret = PAM_SERVICE_ERR;
3423 : }
3424 :
3425 24 : out:
3426 : {
3427 : /* Deal with offline errors. */
3428 : int i;
3429 24 : const char *codes[] = {
3430 : "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3431 : "NT_STATUS_NO_LOGON_SERVERS",
3432 : "NT_STATUS_ACCESS_DENIED"
3433 : };
3434 :
3435 96 : for (i=0; i<ARRAY_SIZE(codes); i++) {
3436 : int _ret;
3437 72 : if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
3438 0 : break;
3439 : }
3440 : }
3441 : }
3442 :
3443 24 : wbcFreeMemory(error);
3444 :
3445 24 : _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
3446 :
3447 24 : TALLOC_FREE(ctx);
3448 :
3449 24 : return pam_error_code(ctx, PAM_WINBIND_CHAUTHTOK, ret);
3450 : }
3451 :
3452 : #ifdef PAM_STATIC
3453 :
3454 : /* static module data */
3455 :
3456 : struct pam_module _pam_winbind_modstruct = {
3457 : MODULE_NAME,
3458 : pam_sm_authenticate,
3459 : pam_sm_setcred,
3460 : pam_sm_acct_mgmt,
3461 : pam_sm_open_session,
3462 : pam_sm_close_session,
3463 : pam_sm_chauthtok
3464 : };
3465 :
3466 : #endif
3467 :
3468 : /*
3469 : * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3470 : * Copyright (c) Tim Potter <tpot@samba.org> 2000
3471 : * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3472 : * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3473 : * Copyright (c) Jan Rêkorajski 1999.
3474 : * Copyright (c) Andrew G. Morgan 1996-8.
3475 : * Copyright (c) Alex O. Yuriev, 1996.
3476 : * Copyright (c) Cristian Gafton 1996.
3477 : * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3478 : *
3479 : * Redistribution and use in source and binary forms, with or without
3480 : * modification, are permitted provided that the following conditions
3481 : * are met:
3482 : * 1. Redistributions of source code must retain the above copyright
3483 : * notice, and the entire permission notice in its entirety,
3484 : * including the disclaimer of warranties.
3485 : * 2. Redistributions in binary form must reproduce the above copyright
3486 : * notice, this list of conditions and the following disclaimer in the
3487 : * documentation and/or other materials provided with the distribution.
3488 : * 3. The name of the author may not be used to endorse or promote
3489 : * products derived from this software without specific prior
3490 : * written permission.
3491 : *
3492 : * ALTERNATIVELY, this product may be distributed under the terms of
3493 : * the GNU Public License, in which case the provisions of the GPL are
3494 : * required INSTEAD OF the above restrictions. (This clause is
3495 : * necessary due to a potential bad interaction between the GPL and
3496 : * the restrictions contained in a BSD-style copyright.)
3497 : *
3498 : * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3499 : * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3500 : * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3501 : * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3502 : * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3503 : * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3504 : * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3505 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3506 : * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3507 : * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3508 : * OF THE POSSIBILITY OF SUCH DAMAGE.
3509 : */
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