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 :
62 342 : static const char *_pam_error_code_str(int err)
63 : {
64 342 : switch (err) {
65 190 : case PAM_SUCCESS:
66 190 : 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);
165 266 : static inline void textdomain_init(void)
166 : {
167 266 : if (!initialized) {
168 250 : bindtextdomain(MODULE_NAME, LOCALEDIR);
169 250 : initialized = 1;
170 : }
171 266 : 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 4334 : static void _pam_log_int(const pam_handle_t *pamh,
184 : int err,
185 : const char *format,
186 : va_list args)
187 : {
188 4334 : pam_vsyslog(pamh, err, format, args);
189 4334 : }
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 4866 : static bool _pam_log_is_silent(int ctrl)
220 : {
221 4866 : 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);
225 622 : static void _pam_log(struct pwb_context *r, int err, const char *format, ...)
226 : {
227 : va_list args;
228 :
229 622 : if (_pam_log_is_silent(r->ctrl)) {
230 0 : return;
231 : }
232 :
233 622 : va_start(args, format);
234 622 : _pam_log_int(r->pamh, err, format, args);
235 622 : 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 4244 : static bool _pam_log_is_debug_enabled(int ctrl)
252 : {
253 4244 : if (ctrl == -1) {
254 0 : return false;
255 : }
256 :
257 4244 : if (_pam_log_is_silent(ctrl)) {
258 0 : return false;
259 : }
260 :
261 4244 : if (!(ctrl & WINBIND_DEBUG_ARG)) {
262 0 : return false;
263 : }
264 :
265 4244 : return true;
266 : }
267 :
268 734 : static bool _pam_log_is_debug_state_enabled(int ctrl)
269 : {
270 734 : if (!(ctrl & WINBIND_DEBUG_STATE)) {
271 202 : return false;
272 : }
273 :
274 532 : 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 3712 : static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...)
279 : {
280 : va_list args;
281 :
282 3712 : if (!r || !_pam_log_is_debug_enabled(r->ctrl)) {
283 0 : return;
284 : }
285 :
286 3712 : va_start(args, format);
287 3712 : _pam_log_int(r->pamh, err, format, args);
288 3712 : 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 9044 : static void _pam_log_state_datum(struct pwb_context *ctx,
305 : int item_type,
306 : const char *key,
307 : int is_string)
308 : {
309 9044 : const void *data = NULL;
310 9044 : if (item_type != 0) {
311 5320 : pam_get_item(ctx->pamh, item_type, &data);
312 : } else {
313 3724 : pam_get_data(ctx->pamh, key, &data);
314 : }
315 9044 : if (data != NULL) {
316 2164 : const char *type = (item_type != 0) ? "ITEM" : "DATA";
317 2164 : if (is_string != 0) {
318 1596 : _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 {
323 568 : _pam_log_debug(ctx, LOG_DEBUG,
324 : "[pamh: %p] STATE: %s(%s) = %p",
325 : ctx->pamh, type, key, data);
326 : }
327 : }
328 9044 : }
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 :
371 532 : static void _pam_log_state(struct pwb_context *ctx)
372 : {
373 532 : if (!ctx || !_pam_log_is_debug_state_enabled(ctx->ctrl)) {
374 0 : return;
375 : }
376 :
377 532 : _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_SERVICE);
378 532 : _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER);
379 532 : _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_TTY);
380 532 : _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RHOST);
381 532 : _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RUSER);
382 532 : _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_OLDAUTHTOK);
383 532 : _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_AUTHTOK);
384 532 : _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER_PROMPT);
385 532 : _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_CONV);
386 : #ifdef PAM_FAIL_DELAY
387 532 : _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 :
393 532 : _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_HOMEDIR);
394 532 : _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSCRIPT);
395 532 : _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSERVER);
396 532 : _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_PROFILEPATH);
397 532 : _PAM_LOG_STATE_DATA_STRING(ctx,
398 : PAM_WINBIND_NEW_AUTHTOK_REQD);
399 : /* Use atoi to get PAM result code */
400 532 : _PAM_LOG_STATE_DATA_STRING(ctx,
401 : PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
402 532 : _PAM_LOG_STATE_DATA_POINTER(ctx, PAM_WINBIND_PWD_LAST_SET);
403 : }
404 :
405 468 : 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 : {
412 468 : int ctrl = 0;
413 468 : const char *config_file = NULL;
414 : int i;
415 : const char **v;
416 468 : struct tiniparser_dictionary *d = NULL;
417 :
418 468 : if (flags & PAM_SILENT) {
419 0 : ctrl |= WINBIND_SILENT;
420 : }
421 :
422 1296 : for (i=argc,v=argv; i-- > 0; ++v) {
423 828 : if (!strncasecmp(*v, "config", strlen("config"))) {
424 0 : ctrl |= WINBIND_CONFIG_FILE;
425 0 : config_file = v[i];
426 0 : break;
427 : }
428 : }
429 :
430 468 : if (config_file == NULL) {
431 468 : config_file = PAM_WINBIND_CONFIG_FILE;
432 : }
433 :
434 468 : d = tiniparser_load(config_file);
435 468 : if (d == NULL) {
436 468 : 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 0 : if (tiniparser_getboolean(d, "global:pwd_change_prompt", false)) {
483 0 : ctrl |= WINBIND_PWD_CHANGE_PROMPT;
484 : }
485 :
486 0 : config_from_pam:
487 : /* step through arguments */
488 1296 : for (i=argc,v=argv; i-- > 0; ++v) {
489 :
490 : /* generic options */
491 828 : if (!strcmp(*v,"debug"))
492 266 : ctrl |= WINBIND_DEBUG_ARG;
493 562 : else if (!strcasecmp(*v, "debug_state"))
494 266 : ctrl |= WINBIND_DEBUG_STATE;
495 296 : else if (!strcasecmp(*v, "silent"))
496 0 : ctrl |= WINBIND_SILENT;
497 296 : else if (!strcasecmp(*v, "use_authtok"))
498 8 : ctrl |= WINBIND_USE_AUTHTOK_ARG;
499 288 : else if (!strcasecmp(*v, "try_authtok"))
500 8 : ctrl |= WINBIND_TRY_AUTHTOK_ARG;
501 280 : else if (!strcasecmp(*v, "use_first_pass"))
502 0 : ctrl |= WINBIND_USE_FIRST_PASS_ARG;
503 280 : else if (!strcasecmp(*v, "try_first_pass"))
504 0 : ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
505 280 : else if (!strcasecmp(*v, "unknown_ok"))
506 0 : ctrl |= WINBIND_UNKNOWN_OK_ARG;
507 280 : else if ((type == PAM_WINBIND_AUTHENTICATE
508 32 : || type == PAM_WINBIND_SETCRED)
509 256 : && !strncasecmp(*v, "require_membership_of",
510 : strlen("require_membership_of")))
511 0 : ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
512 280 : else if ((type == PAM_WINBIND_AUTHENTICATE
513 32 : || type == PAM_WINBIND_SETCRED)
514 256 : && !strncasecmp(*v, "require-membership-of",
515 : strlen("require-membership-of")))
516 0 : ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
517 280 : else if (!strcasecmp(*v, "krb5_auth"))
518 136 : ctrl |= WINBIND_KRB5_AUTH;
519 144 : else if (!strncasecmp(*v, "krb5_ccache_type",
520 : strlen("krb5_ccache_type")))
521 136 : ctrl |= WINBIND_KRB5_CCACHE_TYPE;
522 8 : else if (!strcasecmp(*v, "cached_login"))
523 0 : ctrl |= WINBIND_CACHED_LOGIN;
524 8 : else if (!strcasecmp(*v, "mkhomedir"))
525 0 : ctrl |= WINBIND_MKHOMEDIR;
526 8 : else if (!strncasecmp(*v, "warn_pwd_expire",
527 : strlen("warn_pwd_expire")))
528 8 : ctrl |= WINBIND_WARN_PWD_EXPIRE;
529 0 : else if (!strcasecmp(*v, "pwd_change_prompt"))
530 0 : ctrl |= WINBIND_PWD_CHANGE_PROMPT;
531 0 : else if (type != PAM_WINBIND_CLEANUP) {
532 0 : __pam_log(pamh, ctrl, LOG_ERR,
533 : "pam_parse: unknown option: %s", *v);
534 0 : return -1;
535 : }
536 :
537 : }
538 :
539 468 : if (result_d) {
540 266 : *result_d = d;
541 : } else {
542 202 : if (d) {
543 0 : tiniparser_freedict(d);
544 : }
545 : }
546 :
547 468 : return ctrl;
548 : };
549 :
550 266 : static int _pam_winbind_free_context(struct pwb_context *ctx)
551 : {
552 266 : if (!ctx) {
553 0 : return 0;
554 : }
555 :
556 266 : if (ctx->dict) {
557 0 : tiniparser_freedict(ctx->dict);
558 : }
559 :
560 266 : wbcCtxFree(ctx->wbc_ctx);
561 :
562 266 : return 0;
563 : }
564 :
565 266 : static int _pam_winbind_init_context(pam_handle_t *pamh,
566 : int flags,
567 : int argc,
568 : const char **argv,
569 : enum pam_winbind_request_type type,
570 : struct pwb_context **ctx_p)
571 : {
572 266 : struct pwb_context *r = NULL;
573 266 : const char *service = NULL;
574 266 : char service_name[32] = {0};
575 : int ctrl_code;
576 :
577 : #ifdef HAVE_GETTEXT
578 266 : textdomain_init();
579 : #endif
580 :
581 266 : r = talloc_zero(NULL, struct pwb_context);
582 266 : if (!r) {
583 0 : return PAM_BUF_ERR;
584 : }
585 :
586 266 : talloc_set_destructor(r, _pam_winbind_free_context);
587 :
588 266 : r->pamh = pamh;
589 266 : r->flags = flags;
590 266 : r->argc = argc;
591 266 : r->argv = argv;
592 266 : ctrl_code = _pam_parse(pamh, flags, argc, argv, type, &r->dict);
593 266 : if (ctrl_code == -1) {
594 0 : TALLOC_FREE(r);
595 0 : return PAM_SYSTEM_ERR;
596 : }
597 266 : r->ctrl = ctrl_code;
598 :
599 266 : r->wbc_ctx = wbcCtxCreate();
600 266 : if (r->wbc_ctx == NULL) {
601 0 : TALLOC_FREE(r);
602 0 : return PAM_SYSTEM_ERR;
603 : }
604 :
605 266 : pam_get_item(pamh, PAM_SERVICE, (const void **)&service);
606 :
607 266 : snprintf(service_name, sizeof(service_name), "PAM_WINBIND[%s]", service);
608 :
609 266 : wbcSetClientProcessName(service_name);
610 :
611 266 : *ctx_p = r;
612 :
613 266 : return PAM_SUCCESS;
614 : }
615 :
616 202 : static void _pam_winbind_cleanup_func(pam_handle_t *pamh,
617 : void *data,
618 : int error_status)
619 : {
620 202 : int ctrl = _pam_parse(pamh, 0, 0, NULL, PAM_WINBIND_CLEANUP, NULL);
621 202 : if (_pam_log_is_debug_state_enabled(ctrl)) {
622 0 : __pam_log_debug(pamh, ctrl, LOG_DEBUG,
623 : "[pamh: %p] CLEAN: cleaning up PAM data %p "
624 : "(error_status = %d)", pamh, data,
625 : error_status);
626 : }
627 202 : TALLOC_FREE(data);
628 202 : }
629 :
630 :
631 : static const struct ntstatus_errors {
632 : const char *ntstatus_string;
633 : const char *error_string;
634 : } ntstatus_errors[] = {
635 : {"NT_STATUS_OK",
636 : N_("Success")},
637 : {"NT_STATUS_BACKUP_CONTROLLER",
638 : N_("No primary Domain Controller available")},
639 : {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
640 : N_("No domain controllers found")},
641 : {"NT_STATUS_NO_LOGON_SERVERS",
642 : N_("No logon servers")},
643 : {"NT_STATUS_PWD_TOO_SHORT",
644 : N_("Password too short")},
645 : {"NT_STATUS_PWD_TOO_RECENT",
646 : N_("The password was recently changed and cannot be changed again before %s")},
647 : {"NT_STATUS_PWD_HISTORY_CONFLICT",
648 : N_("Password is already in password history")},
649 : {"NT_STATUS_PASSWORD_EXPIRED",
650 : N_("Your password has expired")},
651 : {"NT_STATUS_PASSWORD_MUST_CHANGE",
652 : N_("You need to change your password now")},
653 : {"NT_STATUS_INVALID_WORKSTATION",
654 : N_("You are not allowed to logon from this workstation")},
655 : {"NT_STATUS_INVALID_LOGON_HOURS",
656 : N_("You are not allowed to logon at this time")},
657 : {"NT_STATUS_ACCOUNT_EXPIRED",
658 : N_("Your account has expired. "
659 : "Please contact your System administrator")}, /* SCNR */
660 : {"NT_STATUS_ACCOUNT_DISABLED",
661 : N_("Your account is disabled. "
662 : "Please contact your System administrator")}, /* SCNR */
663 : {"NT_STATUS_ACCOUNT_LOCKED_OUT",
664 : N_("Your account has been locked. "
665 : "Please contact your System administrator")}, /* SCNR */
666 : {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
667 : N_("Invalid Trust Account")},
668 : {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
669 : N_("Invalid Trust Account")},
670 : {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
671 : N_("Invalid Trust Account")},
672 : {"NT_STATUS_ACCESS_DENIED",
673 : N_("Access is denied")},
674 : {NULL, NULL}
675 : };
676 :
677 52 : static const char *_get_ntstatus_error_string(const char *nt_status_string)
678 : {
679 : int i;
680 988 : for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
681 936 : if (!strcasecmp(ntstatus_errors[i].ntstatus_string,
682 : nt_status_string)) {
683 0 : return _(ntstatus_errors[i].error_string);
684 : }
685 : }
686 52 : return NULL;
687 : }
688 :
689 : /* --- authentication management functions --- */
690 :
691 : /* Attempt a conversation */
692 :
693 310 : static int converse(const pam_handle_t *pamh,
694 : int nargs,
695 : const struct pam_message **message,
696 : struct pam_response **response)
697 : {
698 : int retval;
699 : const struct pam_conv *conv;
700 :
701 310 : retval = pam_get_item(pamh, PAM_CONV, (const void **) &conv);
702 310 : if (retval == PAM_SUCCESS) {
703 310 : retval = conv->conv(nargs,
704 : discard_const_p(const struct pam_message *, message),
705 310 : response, conv->appdata_ptr);
706 : }
707 :
708 310 : return retval; /* propagate error status */
709 : }
710 :
711 :
712 56 : static int _make_remark(struct pwb_context *ctx,
713 : int type,
714 : const char *text)
715 : {
716 56 : int retval = PAM_SUCCESS;
717 :
718 : const struct pam_message *pmsg[1];
719 : struct pam_message msg[1];
720 : struct pam_response *resp;
721 :
722 56 : if (ctx->flags & WINBIND_SILENT) {
723 0 : return PAM_SUCCESS;
724 : }
725 :
726 56 : pmsg[0] = &msg[0];
727 56 : msg[0].msg = discard_const_p(char, text);
728 56 : msg[0].msg_style = type;
729 :
730 56 : resp = NULL;
731 56 : retval = converse(ctx->pamh, 1, pmsg, &resp);
732 :
733 56 : if (resp) {
734 6816 : _pam_drop_reply(resp, 1);
735 : }
736 56 : return retval;
737 : }
738 :
739 : static int _make_remark_v(struct pwb_context *ctx,
740 : int type,
741 : const char *format,
742 : va_list args) PRINTF_ATTRIBUTE(3, 0);
743 :
744 4 : static int _make_remark_v(struct pwb_context *ctx,
745 : int type,
746 : const char *format,
747 : va_list args)
748 : {
749 : char *var;
750 : int ret;
751 :
752 4 : ret = vasprintf(&var, format, args);
753 4 : if (ret < 0) {
754 0 : _pam_log(ctx, LOG_ERR, "memory allocation failure");
755 0 : return ret;
756 : }
757 :
758 4 : ret = _make_remark(ctx, type, var);
759 4 : SAFE_FREE(var);
760 4 : return ret;
761 : }
762 :
763 : static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
764 4 : static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...)
765 : {
766 : int ret;
767 : va_list args;
768 :
769 4 : va_start(args, format);
770 4 : ret = _make_remark_v(ctx, type, format, args);
771 4 : va_end(args);
772 4 : return ret;
773 : }
774 :
775 264 : static int pam_winbind_request_log(struct pwb_context *ctx,
776 : int retval,
777 : const char *user,
778 : const char *fn)
779 : {
780 264 : switch (retval) {
781 76 : case PAM_AUTH_ERR:
782 : /* incorrect password */
783 76 : _pam_log(ctx, LOG_WARNING, "user '%s' denied access "
784 : "(incorrect password or invalid membership)", user);
785 76 : return retval;
786 0 : case PAM_ACCT_EXPIRED:
787 : /* account expired */
788 0 : _pam_log(ctx, LOG_WARNING, "user '%s' account expired",
789 : user);
790 0 : return retval;
791 0 : case PAM_AUTHTOK_EXPIRED:
792 : /* password expired */
793 0 : _pam_log(ctx, LOG_WARNING, "user '%s' password expired",
794 : user);
795 0 : return retval;
796 0 : case PAM_NEW_AUTHTOK_REQD:
797 : /* new password required */
798 0 : _pam_log(ctx, LOG_WARNING, "user '%s' new password "
799 : "required", user);
800 0 : return retval;
801 0 : case PAM_USER_UNKNOWN:
802 : /* the user does not exist */
803 0 : _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
804 : user);
805 0 : if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
806 0 : return PAM_IGNORE;
807 : }
808 0 : return retval;
809 0 : case PAM_AUTHTOK_ERR:
810 : /* Authentication token manipulation error */
811 0 : _pam_log(ctx, LOG_WARNING, "user `%s' authentication token change failed "
812 : "(pwd complexity/history/min_age not met?)", user);
813 0 : return retval;
814 188 : case PAM_SUCCESS:
815 : /* Otherwise, the authentication looked good */
816 188 : if (strcmp(fn, "wbcLogonUser") == 0) {
817 174 : _pam_log(ctx, LOG_NOTICE,
818 : "user '%s' granted access", user);
819 : } else {
820 14 : _pam_log(ctx, LOG_NOTICE,
821 : "user '%s' OK", user);
822 : }
823 188 : return retval;
824 0 : default:
825 : /* we don't know anything about this return value */
826 0 : _pam_log(ctx, LOG_ERR,
827 : "internal module error (retval = %s(%d), user = '%s')",
828 : _pam_error_code_str(retval), retval, user);
829 0 : return retval;
830 : }
831 : }
832 :
833 264 : static int wbc_auth_error_to_pam_error(struct pwb_context *ctx,
834 : struct wbcAuthErrorInfo *e,
835 : wbcErr status,
836 : const char *username,
837 : const char *fn)
838 : {
839 264 : int ret = PAM_AUTH_ERR;
840 :
841 264 : if (WBC_ERROR_IS_OK(status)) {
842 188 : _pam_log_debug(ctx, LOG_DEBUG, "request %s succeeded",
843 : fn);
844 188 : ret = PAM_SUCCESS;
845 188 : return pam_winbind_request_log(ctx, ret, username, fn);
846 : }
847 :
848 76 : if (e) {
849 76 : if (e->pam_error != PAM_SUCCESS) {
850 76 : _pam_log(ctx, LOG_ERR,
851 : "request %s failed: %s, "
852 : "PAM error: %s (%d), NTSTATUS: %s, "
853 : "Error message was: %s",
854 : fn,
855 : wbcErrorString(status),
856 : _pam_error_code_str(e->pam_error),
857 : e->pam_error,
858 : e->nt_string,
859 : e->display_string);
860 76 : ret = e->pam_error;
861 76 : return pam_winbind_request_log(ctx, ret, username, fn);
862 : }
863 :
864 0 : _pam_log(ctx, LOG_ERR, "request %s failed, but PAM error 0!", fn);
865 :
866 0 : ret = PAM_SERVICE_ERR;
867 0 : return pam_winbind_request_log(ctx, ret, username, fn);
868 : }
869 :
870 0 : ret = wbc_error_to_pam_error(status);
871 0 : _pam_log(ctx, LOG_ERR,
872 : "request %s failed: %s, PAM error: %s (%d)!",
873 : fn, wbcErrorString(status),
874 : _pam_error_code_str(ret), ret);
875 0 : return pam_winbind_request_log(ctx, ret, username, fn);
876 : }
877 :
878 : #if defined(HAVE_PAM_RADIO_TYPE)
879 0 : static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
880 : {
881 : struct pam_message msg;
882 : const struct pam_message *pmsg;
883 0 : struct pam_response *resp = NULL;
884 : int ret;
885 0 : bool retval = false;
886 0 : pmsg = &msg;
887 0 : msg.msg_style = PAM_RADIO_TYPE;
888 0 : msg.msg = _("Do you want to change your password now?");
889 0 : ret = converse(ctx->pamh, 1, &pmsg, &resp);
890 0 : if (resp == NULL) {
891 0 : if (ret == PAM_SUCCESS) {
892 0 : _pam_log(ctx, LOG_CRIT, "pam_winbind: system error!\n");
893 0 : return false;
894 : }
895 : }
896 0 : if (ret != PAM_SUCCESS) {
897 0 : return false;
898 : }
899 0 : _pam_log(ctx, LOG_CRIT, "Received [%s] reply from application.\n", resp->resp);
900 :
901 0 : if ((resp->resp != NULL) && (strcasecmp(resp->resp, "yes") == 0)) {
902 0 : retval = true;
903 : }
904 :
905 0 : _pam_drop_reply(resp, 1);
906 0 : return retval;
907 : }
908 : #else
909 : static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
910 : {
911 : return false;
912 : }
913 : #endif
914 :
915 : /**
916 : * send a password expiry message if required
917 : *
918 : * @param ctx PAM winbind context.
919 : * @param next_change expected (calculated) next expiry date.
920 : * @param already_expired pointer to a boolean to indicate if the password is
921 : * already expired.
922 : *
923 : * @return boolean Returns true if message has been sent, false if not.
924 : */
925 :
926 174 : static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
927 : time_t next_change,
928 : time_t now,
929 : int warn_pwd_expire,
930 : bool *already_expired,
931 : bool *change_pwd)
932 : {
933 174 : int days = 0;
934 : struct tm tm_now, tm_next_change;
935 174 : bool retval = false;
936 : int ret;
937 :
938 174 : if (already_expired) {
939 174 : *already_expired = false;
940 : }
941 :
942 174 : if (change_pwd) {
943 174 : *change_pwd = false;
944 : }
945 :
946 174 : if (next_change <= now) {
947 0 : PAM_WB_REMARK_DIRECT(ctx, "NT_STATUS_PASSWORD_EXPIRED");
948 0 : if (already_expired) {
949 0 : *already_expired = true;
950 : }
951 0 : return true;
952 : }
953 :
954 174 : if ((next_change < 0) ||
955 174 : (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
956 170 : return false;
957 : }
958 :
959 8 : if ((localtime_r(&now, &tm_now) == NULL) ||
960 4 : (localtime_r(&next_change, &tm_next_change) == NULL)) {
961 0 : return false;
962 : }
963 :
964 4 : days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) -
965 4 : (tm_now.tm_yday+tm_now.tm_year*365);
966 :
967 4 : if (days == 0) {
968 0 : ret = _make_remark(ctx, PAM_TEXT_INFO,
969 0 : _("Your password expires today.\n"));
970 :
971 : /*
972 : * If change_pwd and already_expired is null.
973 : * We are just sending a notification message.
974 : * We don't expect any response in this case.
975 : */
976 :
977 0 : if (!change_pwd && !already_expired) {
978 0 : return true;
979 : }
980 :
981 : /*
982 : * successfully sent the warning message.
983 : * Give the user a chance to change pwd.
984 : */
985 0 : if (ret == PAM_SUCCESS &&
986 0 : (ctx->ctrl & WINBIND_PWD_CHANGE_PROMPT)) {
987 0 : if (change_pwd) {
988 0 : retval = _pam_winbind_change_pwd(ctx);
989 0 : if (retval) {
990 0 : *change_pwd = true;
991 : }
992 : }
993 : }
994 0 : return true;
995 : }
996 :
997 4 : if (days > 0 && days < warn_pwd_expire) {
998 :
999 4 : ret = _make_remark_format(ctx, PAM_TEXT_INFO,
1000 4 : _("Your password will expire in %d %s.\n"),
1001 4 : days, (days > 1) ? _("days"):_("day"));
1002 : /*
1003 : * If change_pwd and already_expired is null.
1004 : * We are just sending a notification message.
1005 : * We don't expect any response in this case.
1006 : */
1007 :
1008 4 : if (!change_pwd && !already_expired) {
1009 0 : return true;
1010 : }
1011 :
1012 : /*
1013 : * successfully sent the warning message.
1014 : * Give the user a chance to change pwd.
1015 : */
1016 4 : if (ret == PAM_SUCCESS &&
1017 4 : (ctx->ctrl & WINBIND_PWD_CHANGE_PROMPT)) {
1018 0 : if (change_pwd) {
1019 0 : retval = _pam_winbind_change_pwd(ctx);
1020 0 : if (retval) {
1021 0 : *change_pwd = true;
1022 : }
1023 : }
1024 : }
1025 4 : return true;
1026 : }
1027 :
1028 0 : return false;
1029 : }
1030 :
1031 : /**
1032 : * Send a warning if the password expires in the near future
1033 : *
1034 : * @param ctx PAM winbind context.
1035 : * @param response The full authentication response structure.
1036 : * @param already_expired boolean, is the pwd already expired?
1037 : *
1038 : * @return void.
1039 : */
1040 :
1041 174 : static void _pam_warn_password_expiry(struct pwb_context *ctx,
1042 : const struct wbcAuthUserInfo *info,
1043 : int warn_pwd_expire,
1044 : bool *already_expired,
1045 : bool *change_pwd)
1046 : {
1047 174 : time_t now = time(NULL);
1048 174 : time_t next_change = 0;
1049 :
1050 174 : if (info == NULL) {
1051 0 : return;
1052 : }
1053 :
1054 174 : if (already_expired) {
1055 174 : *already_expired = false;
1056 : }
1057 :
1058 174 : if (change_pwd) {
1059 174 : *change_pwd = false;
1060 : }
1061 :
1062 : /* accounts with WBC_ACB_PWNOEXP set never receive a warning */
1063 174 : if (info->acct_flags & WBC_ACB_PWNOEXP) {
1064 0 : return;
1065 : }
1066 :
1067 : /* no point in sending a warning if this is a grace logon */
1068 174 : if (PAM_WB_GRACE_LOGON(info->user_flags)) {
1069 0 : return;
1070 : }
1071 :
1072 : /* check if the info3 must change timestamp has been set */
1073 174 : next_change = info->pass_must_change_time;
1074 :
1075 174 : if (_pam_send_password_expiry_message(ctx, next_change, now,
1076 : warn_pwd_expire,
1077 : already_expired,
1078 : change_pwd)) {
1079 4 : return;
1080 : }
1081 :
1082 : /* no warning sent */
1083 : }
1084 :
1085 : #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
1086 :
1087 : /**
1088 : * Append a string, making sure not to overflow and to always return a
1089 : * NULL-terminated string.
1090 : *
1091 : * @param dest Destination string buffer (must already be NULL-terminated).
1092 : * @param src Source string buffer.
1093 : * @param dest_buffer_size Size of dest buffer in bytes.
1094 : *
1095 : * @return false if dest buffer is not big enough (no bytes copied), true on
1096 : * success.
1097 : */
1098 :
1099 0 : static bool safe_append_string(char *dest,
1100 : const char *src,
1101 : int dest_buffer_size)
1102 : {
1103 : size_t len;
1104 0 : len = strlcat(dest, src, dest_buffer_size);
1105 0 : return (len < dest_buffer_size);
1106 : }
1107 :
1108 : /**
1109 : * Convert a names into a SID string, appending it to a buffer.
1110 : *
1111 : * @param ctx PAM winbind context.
1112 : * @param user User in PAM request.
1113 : * @param name Name to convert.
1114 : * @param sid_list_buffer Where to append the string sid.
1115 : * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1116 : *
1117 : * @return false on failure, true on success.
1118 : */
1119 0 : static bool winbind_name_to_sid_string(struct pwb_context *ctx,
1120 : const char *user,
1121 : const char *name,
1122 : char *sid_list_buffer,
1123 : int sid_list_buffer_size)
1124 : {
1125 : char sid_string[WBC_SID_STRING_BUFLEN];
1126 :
1127 : /* lookup name? */
1128 0 : if (IS_SID_STRING(name)) {
1129 0 : strlcpy(sid_string, name, sizeof(sid_string));
1130 : } else {
1131 : wbcErr wbc_status;
1132 : struct wbcDomainSid sid;
1133 : enum wbcSidType type;
1134 :
1135 0 : _pam_log_debug(ctx, LOG_DEBUG,
1136 : "no sid given, looking up: %s\n", name);
1137 :
1138 0 : wbc_status = wbcCtxLookupName(ctx->wbc_ctx,
1139 : "",
1140 : name,
1141 : &sid,
1142 : &type);
1143 0 : if (!WBC_ERROR_IS_OK(wbc_status)) {
1144 0 : _pam_log(ctx, LOG_INFO,
1145 : "could not lookup name: %s\n", name);
1146 0 : return false;
1147 : }
1148 :
1149 0 : wbcSidToStringBuf(&sid, sid_string, sizeof(sid_string));
1150 : }
1151 :
1152 0 : if (!safe_append_string(sid_list_buffer, sid_string,
1153 : sid_list_buffer_size)) {
1154 0 : return false;
1155 : }
1156 0 : return true;
1157 : }
1158 :
1159 : /**
1160 : * Convert a list of names into a list of sids.
1161 : *
1162 : * @param ctx PAM winbind context.
1163 : * @param user User in PAM request.
1164 : * @param name_list List of names or string sids, separated by commas.
1165 : * @param sid_list_buffer Where to put the list of string sids.
1166 : * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1167 : *
1168 : * @return false on failure, true on success.
1169 : */
1170 0 : static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
1171 : const char *user,
1172 : const char *name_list,
1173 : char *sid_list_buffer,
1174 : int sid_list_buffer_size)
1175 : {
1176 0 : bool result = false;
1177 0 : char *current_name = NULL;
1178 : const char *search_location;
1179 : const char *comma;
1180 : int len;
1181 :
1182 0 : if (sid_list_buffer_size > 0) {
1183 0 : sid_list_buffer[0] = 0;
1184 : }
1185 :
1186 0 : search_location = name_list;
1187 0 : while ((comma = strchr(search_location, ',')) != NULL) {
1188 0 : current_name = strndup(search_location,
1189 0 : comma - search_location);
1190 0 : if (NULL == current_name) {
1191 0 : goto out;
1192 : }
1193 :
1194 0 : if (!winbind_name_to_sid_string(ctx, user,
1195 : current_name,
1196 : sid_list_buffer,
1197 : sid_list_buffer_size)) {
1198 : /*
1199 : * If one group name failed, we must not fail
1200 : * the authentication totally, continue with
1201 : * the following group names. If user belongs to
1202 : * one of the valid groups, we must allow it
1203 : * login. -- BoYang
1204 : */
1205 :
1206 0 : _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1207 : "check if group %s is valid group.", current_name,
1208 : current_name);
1209 0 : _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1210 : "to sid, please contact your administrator to see "
1211 : "if group %s is valid."), current_name, current_name);
1212 0 : SAFE_FREE(current_name);
1213 0 : search_location = comma + 1;
1214 0 : continue;
1215 : }
1216 :
1217 0 : SAFE_FREE(current_name);
1218 :
1219 0 : if (!safe_append_string(sid_list_buffer, ",",
1220 : sid_list_buffer_size)) {
1221 0 : goto out;
1222 : }
1223 :
1224 0 : search_location = comma + 1;
1225 : }
1226 :
1227 0 : if (!winbind_name_to_sid_string(ctx, user, search_location,
1228 : sid_list_buffer,
1229 : sid_list_buffer_size)) {
1230 0 : _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1231 : "check if group %s is valid group.", search_location,
1232 : search_location);
1233 0 : _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1234 : "to sid, please contact your administrator to see "
1235 : "if group %s is valid."), search_location, search_location);
1236 :
1237 : /* If no valid groups were converted we should fail outright */
1238 0 : if (name_list != NULL && strlen(sid_list_buffer) == 0) {
1239 0 : result = false;
1240 0 : goto out;
1241 : }
1242 : /*
1243 : * The lookup of the last name failed..
1244 : * It results in require_member_of_sid ends with ','
1245 : * It is malformatted parameter here, overwrite the last ','.
1246 : */
1247 0 : len = strlen(sid_list_buffer);
1248 0 : if ((len != 0) && (sid_list_buffer[len - 1] == ',')) {
1249 0 : sid_list_buffer[len - 1] = '\0';
1250 : }
1251 : }
1252 :
1253 0 : result = true;
1254 :
1255 0 : out:
1256 0 : SAFE_FREE(current_name);
1257 0 : return result;
1258 : }
1259 :
1260 : /**
1261 : * put krb5ccname variable into environment
1262 : *
1263 : * @param ctx PAM winbind context.
1264 : * @param krb5ccname env variable retrieved from winbindd.
1265 : *
1266 : * @return void.
1267 : */
1268 :
1269 174 : static void _pam_setup_krb5_env(struct pwb_context *ctx,
1270 : struct wbcLogonUserInfo *info)
1271 : {
1272 174 : char *var = NULL;
1273 : int ret;
1274 : uint32_t i;
1275 174 : const char *krb5ccname = NULL;
1276 :
1277 174 : if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
1278 146 : return;
1279 : }
1280 :
1281 88 : if (!info) {
1282 0 : return;
1283 : }
1284 :
1285 142 : for (i=0; i < info->num_blobs; i++) {
1286 82 : if (strcasecmp(info->blobs[i].name, "krb5ccname") == 0) {
1287 28 : krb5ccname = (const char *)info->blobs[i].blob.data;
1288 28 : break;
1289 : }
1290 : }
1291 :
1292 88 : if (!krb5ccname || (strlen(krb5ccname) == 0)) {
1293 60 : return;
1294 : }
1295 :
1296 28 : _pam_log_debug(ctx, LOG_DEBUG,
1297 : "request returned KRB5CCNAME: %s", krb5ccname);
1298 :
1299 28 : if (asprintf(&var, "KRB5CCNAME=%s", krb5ccname) == -1) {
1300 0 : return;
1301 : }
1302 :
1303 28 : ret = pam_putenv(ctx->pamh, var);
1304 28 : if (ret != PAM_SUCCESS) {
1305 0 : _pam_log(ctx, LOG_ERR,
1306 : "failed to set KRB5CCNAME to %s: %s",
1307 : var, pam_strerror(ctx->pamh, ret));
1308 : }
1309 28 : free(var);
1310 : }
1311 :
1312 : /**
1313 : * Copy unix username if available (further processed in PAM).
1314 : *
1315 : * @param ctx PAM winbind context
1316 : * @param user_ret A pointer that holds a pointer to a string
1317 : * @param unix_username A username
1318 : *
1319 : * @return void.
1320 : */
1321 :
1322 174 : static void _pam_setup_unix_username(struct pwb_context *ctx,
1323 : char **user_ret,
1324 : struct wbcLogonUserInfo *info)
1325 : {
1326 174 : const char *unix_username = NULL;
1327 : uint32_t i;
1328 :
1329 174 : if (!user_ret || !info) {
1330 12 : return;
1331 : }
1332 :
1333 190 : for (i=0; i < info->num_blobs; i++) {
1334 190 : if (strcasecmp(info->blobs[i].name, "unix_username") == 0) {
1335 162 : unix_username = (const char *)info->blobs[i].blob.data;
1336 162 : break;
1337 : }
1338 : }
1339 :
1340 162 : if (!unix_username || !unix_username[0]) {
1341 0 : return;
1342 : }
1343 :
1344 162 : *user_ret = strdup(unix_username);
1345 : }
1346 :
1347 : /**
1348 : * Set string into the PAM stack.
1349 : *
1350 : * @param ctx PAM winbind context.
1351 : * @param data_name Key name for pam_set_data.
1352 : * @param value String value.
1353 : *
1354 : * @return void.
1355 : */
1356 :
1357 696 : static void _pam_set_data_string(struct pwb_context *ctx,
1358 : const char *data_name,
1359 : const char *value)
1360 : {
1361 : int ret;
1362 :
1363 696 : if (!data_name || !value || (strlen(data_name) == 0) ||
1364 696 : (strlen(value) == 0)) {
1365 506 : return;
1366 : }
1367 :
1368 190 : ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
1369 : _pam_winbind_cleanup_func);
1370 190 : if (ret != PAM_SUCCESS) {
1371 0 : _pam_log_debug(ctx, LOG_DEBUG,
1372 : "Could not set data %s: %s\n",
1373 : data_name, pam_strerror(ctx->pamh, ret));
1374 : }
1375 : }
1376 :
1377 : /**
1378 : * Set info3 strings into the PAM stack.
1379 : *
1380 : * @param ctx PAM winbind context.
1381 : * @param data_name Key name for pam_set_data.
1382 : * @param value String value.
1383 : *
1384 : * @return void.
1385 : */
1386 :
1387 174 : static void _pam_set_data_info3(struct pwb_context *ctx,
1388 : const struct wbcAuthUserInfo *info)
1389 : {
1390 174 : if (info != NULL) {
1391 174 : _pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
1392 174 : info->home_directory);
1393 174 : _pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
1394 174 : info->logon_script);
1395 174 : _pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
1396 174 : info->logon_server);
1397 174 : _pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
1398 174 : info->profile_path);
1399 : }
1400 174 : }
1401 :
1402 : /**
1403 : * Free info3 strings in the PAM stack.
1404 : *
1405 : * @param pamh PAM handle
1406 : *
1407 : * @return void.
1408 : */
1409 :
1410 76 : static void _pam_free_data_info3(pam_handle_t *pamh)
1411 : {
1412 76 : pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1413 76 : pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1414 76 : pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1415 76 : pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1416 76 : }
1417 :
1418 : /**
1419 : * Send PAM_ERROR_MSG for cached or grace logons.
1420 : *
1421 : * @param ctx PAM winbind context.
1422 : * @param username User in PAM request.
1423 : * @param info3_user_flgs Info3 flags containing logon type bits.
1424 : *
1425 : * @return void.
1426 : */
1427 :
1428 174 : static void _pam_warn_logon_type(struct pwb_context *ctx,
1429 : const char *username,
1430 : uint32_t info3_user_flgs)
1431 : {
1432 : /* inform about logon type */
1433 174 : if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1434 :
1435 0 : _make_remark(ctx, PAM_ERROR_MSG,
1436 0 : _("Grace login. "
1437 : "Please change your password as soon you're "
1438 : "online again"));
1439 0 : _pam_log_debug(ctx, LOG_DEBUG,
1440 : "User %s logged on using grace logon\n",
1441 : username);
1442 :
1443 174 : } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1444 :
1445 0 : _make_remark(ctx, PAM_ERROR_MSG,
1446 0 : _("Domain Controller unreachable, "
1447 : "using cached credentials instead. "
1448 : "Network resources may be unavailable"));
1449 0 : _pam_log_debug(ctx, LOG_DEBUG,
1450 : "User %s logged on using cached credentials\n",
1451 : username);
1452 : }
1453 174 : }
1454 :
1455 : /**
1456 : * Send PAM_ERROR_MSG for krb5 errors.
1457 : *
1458 : * @param ctx PAM winbind context.
1459 : * @param username User in PAM request.
1460 : * @param info3_user_flgs Info3 flags containing logon type bits.
1461 : *
1462 : * @return void.
1463 : */
1464 :
1465 174 : static void _pam_warn_krb5_failure(struct pwb_context *ctx,
1466 : const char *username,
1467 : uint32_t info3_user_flgs)
1468 : {
1469 174 : if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1470 0 : _make_remark(ctx, PAM_ERROR_MSG,
1471 0 : _("Failed to establish your Kerberos Ticket cache "
1472 : "due time differences\n"
1473 : "with the domain controller. "
1474 : "Please verify the system time.\n"));
1475 0 : _pam_log_debug(ctx, LOG_DEBUG,
1476 : "User %s: Clock skew when getting Krb5 TGT\n",
1477 : username);
1478 : }
1479 174 : }
1480 :
1481 3520 : static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
1482 : const struct wbcAuthErrorInfo *e,
1483 : const char *nt_status_string,
1484 : int *pam_err)
1485 : {
1486 3520 : const char *ntstatus = NULL;
1487 3520 : const char *error_string = NULL;
1488 :
1489 3520 : if (!e || !pam_err) {
1490 2508 : return false;
1491 : }
1492 :
1493 1012 : ntstatus = e->nt_string;
1494 1012 : if (!ntstatus) {
1495 0 : return false;
1496 : }
1497 :
1498 1012 : if (strcasecmp(ntstatus, nt_status_string) == 0) {
1499 :
1500 52 : error_string = _get_ntstatus_error_string(nt_status_string);
1501 52 : if (error_string) {
1502 0 : _make_remark(ctx, PAM_ERROR_MSG, error_string);
1503 0 : *pam_err = e->pam_error;
1504 0 : return true;
1505 : }
1506 :
1507 52 : if (e->display_string) {
1508 52 : _make_remark(ctx, PAM_ERROR_MSG, _(e->display_string));
1509 52 : *pam_err = e->pam_error;
1510 52 : return true;
1511 : }
1512 :
1513 0 : _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
1514 0 : *pam_err = e->pam_error;
1515 :
1516 0 : return true;
1517 : }
1518 :
1519 960 : return false;
1520 : };
1521 :
1522 : /**
1523 : * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1524 : *
1525 : * @param i The wbcUserPasswordPolicyInfo struct.
1526 : *
1527 : * @return string (caller needs to talloc_free).
1528 : */
1529 :
1530 0 : static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
1531 : struct wbcUserPasswordPolicyInfo *i)
1532 : {
1533 0 : char *str = NULL;
1534 :
1535 0 : if (!i) {
1536 0 : goto failed;
1537 : }
1538 :
1539 0 : str = talloc_asprintf(ctx, _("Your password "));
1540 0 : if (!str) {
1541 0 : goto failed;
1542 : }
1543 :
1544 0 : if (i->min_length_password > 0) {
1545 0 : str = talloc_asprintf_append(str,
1546 0 : _("must be at least %d characters; "),
1547 : i->min_length_password);
1548 0 : if (!str) {
1549 0 : goto failed;
1550 : }
1551 : }
1552 :
1553 0 : if (i->password_history > 0) {
1554 0 : str = talloc_asprintf_append(str,
1555 0 : _("cannot repeat any of your previous %d "
1556 : "passwords; "),
1557 : i->password_history);
1558 0 : if (!str) {
1559 0 : goto failed;
1560 : }
1561 : }
1562 :
1563 0 : if (i->password_properties & WBC_DOMAIN_PASSWORD_COMPLEX) {
1564 0 : str = talloc_asprintf_append(str,
1565 0 : _("must contain capitals, numerals "
1566 : "or punctuation; "
1567 : "and cannot contain your account "
1568 : "or full name; "));
1569 0 : if (!str) {
1570 0 : goto failed;
1571 : }
1572 : }
1573 :
1574 0 : str = talloc_asprintf_append(str,
1575 0 : _("Please type a different password. "
1576 : "Type a password which meets these requirements in "
1577 : "both text boxes."));
1578 0 : if (!str) {
1579 0 : goto failed;
1580 : }
1581 :
1582 0 : return str;
1583 :
1584 0 : failed:
1585 0 : TALLOC_FREE(str);
1586 0 : return NULL;
1587 : }
1588 :
1589 0 : static int _pam_create_homedir(struct pwb_context *ctx,
1590 : const char *dirname,
1591 : mode_t mode)
1592 : {
1593 : int ret;
1594 :
1595 0 : ret = mkdir(dirname, mode);
1596 0 : if (ret != 0 && errno == EEXIST) {
1597 : struct stat sbuf;
1598 :
1599 0 : ret = stat(dirname, &sbuf);
1600 0 : if (ret != 0) {
1601 0 : return PAM_PERM_DENIED;
1602 : }
1603 :
1604 0 : if (!S_ISDIR(sbuf.st_mode)) {
1605 0 : return PAM_PERM_DENIED;
1606 : }
1607 : }
1608 :
1609 0 : if (ret != 0) {
1610 0 : _make_remark_format(ctx, PAM_TEXT_INFO,
1611 0 : _("Creating directory: %s failed: %s"),
1612 0 : dirname, strerror(errno));
1613 0 : _pam_log(ctx, LOG_ERR, "could not create dir: %s (%s)",
1614 0 : dirname, strerror(errno));
1615 0 : return PAM_PERM_DENIED;
1616 : }
1617 :
1618 0 : return PAM_SUCCESS;
1619 : }
1620 :
1621 0 : static int _pam_chown_homedir(struct pwb_context *ctx,
1622 : const char *dirname,
1623 : uid_t uid,
1624 : gid_t gid)
1625 : {
1626 0 : if (chown(dirname, uid, gid) != 0) {
1627 0 : _pam_log(ctx, LOG_ERR, "failed to chown user homedir: %s (%s)",
1628 0 : dirname, strerror(errno));
1629 0 : return PAM_PERM_DENIED;
1630 : }
1631 :
1632 0 : return PAM_SUCCESS;
1633 : }
1634 :
1635 0 : static int _pam_mkhomedir(struct pwb_context *ctx)
1636 : {
1637 0 : struct passwd *pwd = NULL;
1638 0 : char *token = NULL;
1639 0 : char *create_dir = NULL;
1640 0 : char *user_dir = NULL;
1641 : int ret;
1642 : const char *username;
1643 0 : mode_t mode = 0700;
1644 0 : char *safe_ptr = NULL;
1645 0 : char *p = NULL;
1646 :
1647 : /* Get the username */
1648 0 : ret = pam_get_user(ctx->pamh, &username, NULL);
1649 0 : if ((ret != PAM_SUCCESS) || (!username)) {
1650 0 : _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1651 0 : return PAM_SERVICE_ERR;
1652 : }
1653 :
1654 0 : pwd = getpwnam(username);
1655 0 : if (pwd == NULL) {
1656 0 : _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1657 0 : return PAM_USER_UNKNOWN;
1658 : }
1659 0 : _pam_log_debug(ctx, LOG_DEBUG, "homedir is: %s", pwd->pw_dir);
1660 :
1661 0 : ret = _pam_create_homedir(ctx, pwd->pw_dir, 0700);
1662 0 : if (ret == PAM_SUCCESS) {
1663 0 : ret = _pam_chown_homedir(ctx, pwd->pw_dir,
1664 : pwd->pw_uid,
1665 : pwd->pw_gid);
1666 : }
1667 :
1668 0 : if (ret == PAM_SUCCESS) {
1669 0 : return ret;
1670 : }
1671 :
1672 : /* maybe we need to create parent dirs */
1673 0 : create_dir = talloc_strdup(ctx, "/");
1674 0 : if (!create_dir) {
1675 0 : return PAM_BUF_ERR;
1676 : }
1677 :
1678 : /* find final directory */
1679 0 : user_dir = strrchr(pwd->pw_dir, '/');
1680 0 : if (!user_dir) {
1681 0 : return PAM_BUF_ERR;
1682 : }
1683 0 : user_dir++;
1684 :
1685 0 : _pam_log(ctx, LOG_DEBUG, "final directory: %s", user_dir);
1686 :
1687 0 : p = pwd->pw_dir;
1688 :
1689 0 : while ((token = strtok_r(p, "/", &safe_ptr)) != NULL) {
1690 :
1691 0 : mode = 0755;
1692 :
1693 0 : p = NULL;
1694 :
1695 0 : _pam_log_debug(ctx, LOG_DEBUG, "token is %s", token);
1696 :
1697 0 : create_dir = talloc_asprintf_append(create_dir, "%s/", token);
1698 0 : if (!create_dir) {
1699 0 : return PAM_BUF_ERR;
1700 : }
1701 0 : _pam_log_debug(ctx, LOG_DEBUG, "current_dir is %s", create_dir);
1702 :
1703 0 : if (strcmp(token, user_dir) == 0) {
1704 0 : _pam_log_debug(ctx, LOG_DEBUG, "assuming last directory: %s", token);
1705 0 : mode = 0700;
1706 : }
1707 :
1708 0 : ret = _pam_create_homedir(ctx, create_dir, mode);
1709 0 : if (ret != PAM_SUCCESS) {
1710 0 : return ret;
1711 : }
1712 : }
1713 :
1714 0 : return _pam_chown_homedir(ctx, create_dir,
1715 : pwd->pw_uid,
1716 : pwd->pw_gid);
1717 : }
1718 :
1719 : /* talk to winbindd */
1720 250 : static int winbind_auth_request(struct pwb_context *ctx,
1721 : const char *user,
1722 : const char *pass,
1723 : const char *member,
1724 : const char *cctype,
1725 : const int warn_pwd_expire,
1726 : struct wbcAuthErrorInfo **p_error,
1727 : struct wbcLogonUserInfo **p_info,
1728 : time_t *pwd_last_set,
1729 : char **user_ret)
1730 : {
1731 : wbcErr wbc_status;
1732 : struct wbcLogonUserParams logon;
1733 : char membership_of[1024];
1734 250 : uid_t user_uid = -1;
1735 250 : uint32_t flags = WBFLAG_PAM_INFO3_TEXT;
1736 250 : struct wbcLogonUserInfo *info = NULL;
1737 250 : struct wbcAuthUserInfo *user_info = NULL;
1738 250 : struct wbcAuthErrorInfo *error = NULL;
1739 250 : int ret = PAM_AUTH_ERR;
1740 : int i;
1741 250 : const char *codes[] = {
1742 : "NT_STATUS_PASSWORD_EXPIRED",
1743 : "NT_STATUS_PASSWORD_MUST_CHANGE",
1744 : "NT_STATUS_INVALID_WORKSTATION",
1745 : "NT_STATUS_INVALID_LOGON_HOURS",
1746 : "NT_STATUS_ACCOUNT_EXPIRED",
1747 : "NT_STATUS_ACCOUNT_DISABLED",
1748 : "NT_STATUS_ACCOUNT_LOCKED_OUT",
1749 : "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1750 : "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1751 : "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1752 : "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1753 : "NT_STATUS_NO_LOGON_SERVERS",
1754 : "NT_STATUS_WRONG_PASSWORD",
1755 : "NT_STATUS_ACCESS_DENIED"
1756 : };
1757 :
1758 250 : if (pwd_last_set) {
1759 12 : *pwd_last_set = 0;
1760 : }
1761 :
1762 : /* Krb5 auth always has to go against the KDC of the user's realm */
1763 :
1764 250 : if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1765 126 : flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
1766 : }
1767 :
1768 250 : if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1769 126 : struct passwd *pwd = NULL;
1770 :
1771 126 : pwd = getpwnam(user);
1772 126 : if (pwd == NULL) {
1773 0 : return PAM_USER_UNKNOWN;
1774 : }
1775 126 : user_uid = pwd->pw_uid;
1776 : }
1777 :
1778 250 : if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1779 :
1780 126 : _pam_log_debug(ctx, LOG_DEBUG,
1781 : "enabling krb5 login flag\n");
1782 :
1783 126 : flags |= WBFLAG_PAM_KRB5 |
1784 : WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1785 : }
1786 :
1787 250 : if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1788 0 : _pam_log_debug(ctx, LOG_DEBUG,
1789 : "enabling cached login flag\n");
1790 0 : flags |= WBFLAG_PAM_CACHED_LOGIN;
1791 : }
1792 :
1793 250 : if (user_ret) {
1794 238 : *user_ret = NULL;
1795 238 : flags |= WBFLAG_PAM_UNIX_NAME;
1796 : }
1797 :
1798 250 : if (cctype != NULL) {
1799 120 : _pam_log_debug(ctx, LOG_DEBUG,
1800 : "enabling request for a %s krb5 ccache\n",
1801 : cctype);
1802 : }
1803 :
1804 250 : if (member != NULL) {
1805 :
1806 0 : ZERO_STRUCT(membership_of);
1807 :
1808 0 : if (!winbind_name_list_to_sid_string_list(ctx, user, member,
1809 : membership_of,
1810 : sizeof(membership_of))) {
1811 0 : _pam_log_debug(ctx, LOG_ERR,
1812 : "failed to serialize membership of sid "
1813 : "\"%s\"\n", member);
1814 0 : return PAM_AUTH_ERR;
1815 : }
1816 : }
1817 :
1818 250 : ZERO_STRUCT(logon);
1819 :
1820 250 : logon.username = user;
1821 250 : logon.password = pass;
1822 :
1823 250 : if (cctype) {
1824 120 : wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1825 : &logon.blobs,
1826 : "krb5_cc_type",
1827 : 0,
1828 : discard_const_p(uint8_t, cctype),
1829 120 : strlen(cctype)+1);
1830 120 : if (!WBC_ERROR_IS_OK(wbc_status)) {
1831 0 : goto done;
1832 : }
1833 : }
1834 :
1835 250 : wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1836 : &logon.blobs,
1837 : "flags",
1838 : 0,
1839 : (uint8_t *)&flags,
1840 : sizeof(flags));
1841 250 : if (!WBC_ERROR_IS_OK(wbc_status)) {
1842 0 : goto done;
1843 : }
1844 :
1845 250 : wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1846 : &logon.blobs,
1847 : "user_uid",
1848 : 0,
1849 : (uint8_t *)&user_uid,
1850 : sizeof(user_uid));
1851 250 : if (!WBC_ERROR_IS_OK(wbc_status)) {
1852 0 : goto done;
1853 : }
1854 :
1855 250 : if (member) {
1856 0 : wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1857 : &logon.blobs,
1858 : "membership_of",
1859 : 0,
1860 : (uint8_t *)membership_of,
1861 : sizeof(membership_of));
1862 0 : if (!WBC_ERROR_IS_OK(wbc_status)) {
1863 0 : goto done;
1864 : }
1865 : }
1866 :
1867 250 : wbc_status = wbcCtxLogonUser(ctx->wbc_ctx,
1868 : &logon,
1869 : &info,
1870 : &error,
1871 : NULL);
1872 250 : ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1873 : user, "wbcLogonUser");
1874 250 : wbcFreeMemory(logon.blobs);
1875 250 : logon.blobs = NULL;
1876 :
1877 250 : if (info && info->info) {
1878 174 : user_info = info->info;
1879 : }
1880 :
1881 250 : if (pwd_last_set && user_info) {
1882 12 : *pwd_last_set = user_info->pass_last_set_time;
1883 : }
1884 :
1885 250 : if (p_info && info) {
1886 0 : *p_info = info;
1887 : }
1888 :
1889 250 : if (p_error && error) {
1890 : /* We want to process the error in the caller. */
1891 0 : *p_error = error;
1892 0 : return ret;
1893 : }
1894 :
1895 3646 : for (i=0; i<ARRAY_SIZE(codes); i++) {
1896 3448 : int _ret = ret;
1897 3448 : if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1898 52 : ret = _ret;
1899 52 : goto done;
1900 : }
1901 : }
1902 :
1903 198 : if ((ret == PAM_SUCCESS) && user_info && info) {
1904 :
1905 174 : bool already_expired = false;
1906 174 : bool change_pwd = false;
1907 :
1908 : /* warn a user if the password is about to expire soon */
1909 174 : _pam_warn_password_expiry(ctx, user_info,
1910 : warn_pwd_expire,
1911 : &already_expired,
1912 : &change_pwd);
1913 :
1914 174 : if (already_expired == true) {
1915 :
1916 0 : SMB_TIME_T last_set = user_info->pass_last_set_time;
1917 0 : SMB_TIME_T must_set = user_info->pass_must_change_time;
1918 :
1919 0 : _pam_log_debug(ctx, LOG_DEBUG,
1920 : "Password has expired "
1921 : "(Password was last set: %lld, "
1922 : "it must be changed here "
1923 : "%lld (now it's: %ld))\n",
1924 : (long long int)last_set,
1925 : (long long int)must_set,
1926 0 : (long)time(NULL));
1927 :
1928 0 : return PAM_AUTHTOK_EXPIRED;
1929 : }
1930 :
1931 174 : if (change_pwd) {
1932 0 : ret = PAM_NEW_AUTHTOK_REQD;
1933 0 : goto done;
1934 : }
1935 :
1936 : /* inform about logon type */
1937 174 : _pam_warn_logon_type(ctx, user, user_info->user_flags);
1938 :
1939 : /* inform about krb5 failures */
1940 174 : _pam_warn_krb5_failure(ctx, user, user_info->user_flags);
1941 :
1942 : /* set some info3 info for other modules in the stack */
1943 174 : _pam_set_data_info3(ctx, user_info);
1944 :
1945 : /* put krb5ccname into env */
1946 174 : _pam_setup_krb5_env(ctx, info);
1947 :
1948 : /* If winbindd returned a username, return the pointer to it
1949 : * here. */
1950 174 : _pam_setup_unix_username(ctx, user_ret, info);
1951 : }
1952 :
1953 24 : done:
1954 250 : wbcFreeMemory(logon.blobs);
1955 250 : if (info && info->blobs && !p_info) {
1956 162 : wbcFreeMemory(info->blobs);
1957 : /*
1958 : * We set blobs to NULL to prevent a use after free in the
1959 : * in the wbcLogonUserInfoDestructor
1960 : */
1961 162 : info->blobs = NULL;
1962 : }
1963 250 : if (error && !p_error) {
1964 76 : wbcFreeMemory(error);
1965 : }
1966 250 : if (info && !p_info) {
1967 174 : wbcFreeMemory(info);
1968 : }
1969 :
1970 250 : return ret;
1971 : }
1972 :
1973 : /* talk to winbindd */
1974 12 : static int winbind_chauthtok_request(struct pwb_context *ctx,
1975 : const char *user,
1976 : const char *oldpass,
1977 : const char *newpass,
1978 : time_t pwd_last_set)
1979 : {
1980 : wbcErr wbc_status;
1981 : struct wbcChangePasswordParams params;
1982 12 : struct wbcAuthErrorInfo *error = NULL;
1983 12 : struct wbcUserPasswordPolicyInfo *policy = NULL;
1984 12 : enum wbcPasswordChangeRejectReason reject_reason = -1;
1985 12 : uint32_t flags = 0;
1986 :
1987 : int i;
1988 12 : const char *codes[] = {
1989 : "NT_STATUS_BACKUP_CONTROLLER",
1990 : "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1991 : "NT_STATUS_NO_LOGON_SERVERS",
1992 : "NT_STATUS_ACCESS_DENIED",
1993 : "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1994 : "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1995 : "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1996 : };
1997 12 : int ret = PAM_AUTH_ERR;
1998 :
1999 12 : ZERO_STRUCT(params);
2000 :
2001 12 : if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2002 6 : flags |= WBFLAG_PAM_KRB5 |
2003 : WBFLAG_PAM_CONTACT_TRUSTDOM;
2004 : }
2005 :
2006 12 : if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
2007 0 : flags |= WBFLAG_PAM_CACHED_LOGIN;
2008 : }
2009 :
2010 12 : params.account_name = user;
2011 12 : params.level = WBC_CHANGE_PASSWORD_LEVEL_PLAIN;
2012 12 : params.old_password.plaintext = oldpass;
2013 12 : params.new_password.plaintext = newpass;
2014 12 : params.flags = flags;
2015 :
2016 12 : wbc_status = wbcCtxChangeUserPasswordEx(ctx->wbc_ctx,
2017 : ¶ms,
2018 : &error,
2019 : &reject_reason,
2020 : &policy);
2021 12 : ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2022 : user, "wbcChangeUserPasswordEx");
2023 :
2024 12 : if (WBC_ERROR_IS_OK(wbc_status)) {
2025 12 : _pam_log(ctx, LOG_NOTICE,
2026 : "user '%s' password changed", user);
2027 12 : return PAM_SUCCESS;
2028 : }
2029 :
2030 0 : if (!error) {
2031 0 : wbcFreeMemory(policy);
2032 0 : return ret;
2033 : }
2034 :
2035 0 : for (i=0; i<ARRAY_SIZE(codes); i++) {
2036 0 : int _ret = ret;
2037 0 : if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
2038 0 : ret = _ret;
2039 0 : goto done;
2040 : }
2041 : }
2042 :
2043 0 : if (!strcasecmp(error->nt_string,
2044 : "NT_STATUS_PASSWORD_RESTRICTION")) {
2045 :
2046 0 : char *pwd_restriction_string = NULL;
2047 0 : SMB_TIME_T min_pwd_age = 0;
2048 :
2049 0 : if (policy) {
2050 0 : min_pwd_age = policy->min_passwordage;
2051 : }
2052 :
2053 : /* FIXME: avoid to send multiple PAM messages after another */
2054 0 : switch ((int)reject_reason) {
2055 0 : case -1:
2056 0 : break;
2057 0 : case WBC_PWD_CHANGE_NO_ERROR:
2058 0 : if ((min_pwd_age > 0) &&
2059 0 : (pwd_last_set + min_pwd_age > time(NULL))) {
2060 0 : time_t next_change = pwd_last_set + min_pwd_age;
2061 : #if defined(__clang__)
2062 : #pragma clang diagnostic push
2063 : #pragma clang diagnostic ignored "-Wformat-nonliteral"
2064 : #endif
2065 0 : _make_remark_format(ctx, PAM_ERROR_MSG,
2066 : _get_ntstatus_error_string("NT_STATUS_PWD_TOO_RECENT"),
2067 : ctime(&next_change));
2068 : #if defined(__clang__)
2069 : #pragma clang diagnostic pop
2070 : #endif
2071 0 : goto done;
2072 : }
2073 0 : break;
2074 0 : case WBC_PWD_CHANGE_PASSWORD_TOO_SHORT:
2075 0 : PAM_WB_REMARK_DIRECT(ctx,
2076 : "NT_STATUS_PWD_TOO_SHORT");
2077 0 : break;
2078 0 : case WBC_PWD_CHANGE_PWD_IN_HISTORY:
2079 0 : PAM_WB_REMARK_DIRECT(ctx,
2080 : "NT_STATUS_PWD_HISTORY_CONFLICT");
2081 0 : break;
2082 0 : case WBC_PWD_CHANGE_NOT_COMPLEX:
2083 0 : _make_remark(ctx, PAM_ERROR_MSG,
2084 0 : _("Password does not meet "
2085 : "complexity requirements"));
2086 0 : break;
2087 0 : default:
2088 0 : _pam_log_debug(ctx, LOG_DEBUG,
2089 : "unknown password change "
2090 : "reject reason: %d",
2091 : reject_reason);
2092 0 : break;
2093 : }
2094 :
2095 : pwd_restriction_string =
2096 0 : _pam_compose_pwd_restriction_string(ctx, policy);
2097 0 : if (pwd_restriction_string) {
2098 0 : _make_remark(ctx, PAM_ERROR_MSG,
2099 : pwd_restriction_string);
2100 0 : TALLOC_FREE(pwd_restriction_string);
2101 : }
2102 : }
2103 0 : done:
2104 0 : wbcFreeMemory(error);
2105 0 : wbcFreeMemory(policy);
2106 :
2107 0 : return ret;
2108 : }
2109 :
2110 : /*
2111 : * Checks if a user has an account
2112 : *
2113 : * return values:
2114 : * 1 = User not found
2115 : * 0 = OK
2116 : * -1 = System error
2117 : */
2118 24 : static int valid_user(struct pwb_context *ctx,
2119 : const char *user)
2120 : {
2121 : /* check not only if the user is available over NSS calls, also make
2122 : * sure it's really a winbind user, this is important when stacking PAM
2123 : * modules in the 'account' or 'password' facility. */
2124 :
2125 : wbcErr wbc_status;
2126 24 : struct passwd *pwd = NULL;
2127 24 : struct passwd *wb_pwd = NULL;
2128 :
2129 24 : pwd = getpwnam(user);
2130 24 : if (pwd == NULL) {
2131 0 : return 1;
2132 : }
2133 :
2134 24 : wbc_status = wbcCtxGetpwnam(ctx->wbc_ctx, user, &wb_pwd);
2135 24 : wbcFreeMemory(wb_pwd);
2136 24 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2137 0 : _pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
2138 : wbcErrorString(wbc_status));
2139 : }
2140 :
2141 24 : switch (wbc_status) {
2142 0 : case WBC_ERR_UNKNOWN_USER:
2143 : /* match other insane libwbclient return codes */
2144 : case WBC_ERR_WINBIND_NOT_AVAILABLE:
2145 : case WBC_ERR_DOMAIN_NOT_FOUND:
2146 0 : return 1;
2147 24 : case WBC_ERR_SUCCESS:
2148 24 : return 0;
2149 0 : default:
2150 0 : break;
2151 : }
2152 0 : return -1;
2153 : }
2154 :
2155 254 : static char *_pam_delete(register char *xx)
2156 : {
2157 3086 : _pam_overwrite(xx);
2158 254 : _pam_drop(xx);
2159 254 : return NULL;
2160 : }
2161 :
2162 : /*
2163 : * obtain a password from the user
2164 : */
2165 :
2166 262 : static int _winbind_read_password(struct pwb_context *ctx,
2167 : unsigned int ctrl,
2168 : const char *comment,
2169 : const char *prompt1,
2170 : const char *prompt2,
2171 : const char **pass)
2172 : {
2173 : int authtok_flag;
2174 : int retval;
2175 : const char *item;
2176 : char *token;
2177 :
2178 262 : _pam_log(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
2179 :
2180 : /*
2181 : * make sure nothing inappropriate gets returned
2182 : */
2183 :
2184 262 : *pass = token = NULL;
2185 :
2186 : /*
2187 : * which authentication token are we getting?
2188 : */
2189 :
2190 262 : if (on(WINBIND__OLD_PASSWORD, ctrl)) {
2191 12 : authtok_flag = PAM_OLDAUTHTOK;
2192 : } else {
2193 250 : authtok_flag = PAM_AUTHTOK;
2194 : }
2195 :
2196 : /*
2197 : * should we obtain the password from a PAM item ?
2198 : */
2199 :
2200 262 : if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
2201 258 : on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2202 8 : retval = pam_get_item(ctx->pamh,
2203 : authtok_flag,
2204 : (const void **) &item);
2205 8 : if (retval != PAM_SUCCESS) {
2206 : /* very strange. */
2207 0 : _pam_log(ctx, LOG_ALERT,
2208 : "pam_get_item returned error "
2209 : "to unix-read-password");
2210 0 : return retval;
2211 8 : } else if (item != NULL) { /* we have a password! */
2212 8 : *pass = item;
2213 8 : item = NULL;
2214 8 : _pam_log(ctx, LOG_DEBUG,
2215 : "pam_get_item returned a password");
2216 8 : return PAM_SUCCESS;
2217 0 : } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2218 0 : return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
2219 0 : } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
2220 0 : && off(WINBIND__OLD_PASSWORD, ctrl)) {
2221 0 : return PAM_AUTHTOK_RECOVER_ERR;
2222 : }
2223 : }
2224 : /*
2225 : * getting here implies we will have to get the password from the
2226 : * user directly.
2227 : */
2228 :
2229 : {
2230 : struct pam_message msg[3];
2231 : const struct pam_message *pmsg[3];
2232 : struct pam_response *resp;
2233 : int i, replies;
2234 :
2235 : /* prepare to converse */
2236 :
2237 254 : if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
2238 12 : pmsg[0] = &msg[0];
2239 12 : msg[0].msg_style = PAM_TEXT_INFO;
2240 12 : msg[0].msg = discard_const_p(char, comment);
2241 12 : i = 1;
2242 : } else {
2243 242 : i = 0;
2244 : }
2245 :
2246 254 : pmsg[i] = &msg[i];
2247 254 : msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2248 254 : msg[i++].msg = discard_const_p(char, prompt1);
2249 254 : replies = 1;
2250 :
2251 254 : if (prompt2 != NULL) {
2252 4 : pmsg[i] = &msg[i];
2253 4 : msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2254 4 : msg[i++].msg = discard_const_p(char, prompt2);
2255 4 : ++replies;
2256 : }
2257 : /* so call the conversation expecting i responses */
2258 254 : resp = NULL;
2259 254 : retval = converse(ctx->pamh, i, pmsg, &resp);
2260 254 : if (resp == NULL) {
2261 0 : if (retval == PAM_SUCCESS) {
2262 0 : retval = PAM_AUTHTOK_RECOVER_ERR;
2263 : }
2264 0 : goto done;
2265 : }
2266 254 : if (retval != PAM_SUCCESS) {
2267 0 : _pam_drop_reply(resp, i);
2268 0 : goto done;
2269 : }
2270 :
2271 : /* interpret the response */
2272 :
2273 254 : token = x_strdup(resp[i - replies].resp);
2274 254 : if (!token) {
2275 0 : _pam_log(ctx, LOG_NOTICE,
2276 : "could not recover "
2277 : "authentication token");
2278 0 : retval = PAM_AUTHTOK_RECOVER_ERR;
2279 0 : goto done;
2280 : }
2281 :
2282 254 : if (replies == 2) {
2283 : /* verify that password entered correctly */
2284 4 : if (!resp[i - 1].resp ||
2285 4 : strcmp(token, resp[i - 1].resp)) {
2286 0 : _pam_delete(token); /* mistyped */
2287 0 : retval = PAM_AUTHTOK_RECOVER_ERR;
2288 0 : _make_remark(ctx, PAM_ERROR_MSG,
2289 0 : MISTYPED_PASS);
2290 : }
2291 : }
2292 :
2293 : /*
2294 : * tidy up the conversation (resp_retcode) is ignored
2295 : * -- what is it for anyway? AGM
2296 : */
2297 3992 : _pam_drop_reply(resp, i);
2298 : }
2299 :
2300 254 : done:
2301 254 : if (retval != PAM_SUCCESS) {
2302 0 : _pam_log_debug(ctx, LOG_DEBUG,
2303 : "unable to obtain a password");
2304 0 : return retval;
2305 : }
2306 : /* 'token' is the entered password */
2307 :
2308 : /* we store this password as an item */
2309 :
2310 254 : retval = pam_set_item(ctx->pamh, authtok_flag, token);
2311 254 : _pam_delete(token); /* clean it up */
2312 508 : if (retval != PAM_SUCCESS ||
2313 254 : (retval = pam_get_item(ctx->pamh, authtok_flag, (const void **) &item)) != PAM_SUCCESS) {
2314 :
2315 0 : _pam_log(ctx, LOG_CRIT, "error manipulating password");
2316 0 : return retval;
2317 :
2318 : }
2319 :
2320 254 : *pass = item;
2321 254 : item = NULL; /* break link to password */
2322 :
2323 254 : return PAM_SUCCESS;
2324 : }
2325 :
2326 714 : static const char *get_conf_item_string(struct pwb_context *ctx,
2327 : const char *item,
2328 : int config_flag)
2329 : {
2330 714 : int i = 0;
2331 714 : const char *parm_opt = NULL;
2332 :
2333 714 : if (!(ctx->ctrl & config_flag)) {
2334 594 : goto out;
2335 : }
2336 :
2337 : /* let the pam opt take precedence over the pam_winbind.conf option */
2338 484 : for (i=0; i<ctx->argc; i++) {
2339 :
2340 484 : if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2341 : char *p;
2342 :
2343 120 : if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2344 0 : _pam_log(ctx, LOG_INFO,
2345 : "no \"=\" delimiter for \"%s\" found\n",
2346 : item);
2347 0 : goto out;
2348 : }
2349 120 : _pam_log_debug(ctx, LOG_INFO,
2350 : "PAM config: %s '%s'\n", item, p+1);
2351 120 : return p + 1;
2352 : }
2353 : }
2354 :
2355 0 : if (ctx->dict) {
2356 0 : char *key = NULL;
2357 :
2358 0 : key = talloc_asprintf(ctx, "global:%s", item);
2359 0 : if (!key) {
2360 0 : goto out;
2361 : }
2362 :
2363 0 : parm_opt = tiniparser_getstring_nonempty(ctx->dict, key, NULL);
2364 0 : TALLOC_FREE(key);
2365 :
2366 0 : _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
2367 : item, parm_opt);
2368 : }
2369 0 : out:
2370 594 : return parm_opt;
2371 : }
2372 :
2373 238 : static int get_config_item_int(struct pwb_context *ctx,
2374 : const char *item,
2375 : int config_flag)
2376 : {
2377 238 : int i, parm_opt = -1;
2378 :
2379 238 : if (!(ctx->ctrl & config_flag)) {
2380 230 : goto out;
2381 : }
2382 :
2383 : /* let the pam opt take precedence over the pam_winbind.conf option */
2384 24 : for (i = 0; i < ctx->argc; i++) {
2385 :
2386 24 : if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2387 : char *p;
2388 :
2389 8 : if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2390 0 : _pam_log(ctx, LOG_INFO,
2391 : "no \"=\" delimiter for \"%s\" found\n",
2392 : item);
2393 0 : goto out;
2394 : }
2395 8 : parm_opt = atoi(p + 1);
2396 8 : _pam_log_debug(ctx, LOG_INFO,
2397 : "PAM config: %s '%d'\n",
2398 : item, parm_opt);
2399 8 : return parm_opt;
2400 : }
2401 : }
2402 :
2403 0 : if (ctx->dict) {
2404 0 : char *key = NULL;
2405 :
2406 0 : key = talloc_asprintf(ctx, "global:%s", item);
2407 0 : if (!key) {
2408 0 : goto out;
2409 : }
2410 :
2411 0 : parm_opt = tiniparser_getint(ctx->dict, key, -1);
2412 0 : TALLOC_FREE(key);
2413 :
2414 0 : _pam_log_debug(ctx, LOG_INFO,
2415 : "CONFIG file: %s '%d'\n",
2416 : item, parm_opt);
2417 : }
2418 0 : out:
2419 230 : return parm_opt;
2420 : }
2421 :
2422 238 : static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
2423 : {
2424 238 : return get_conf_item_string(ctx, "krb5_ccache_type",
2425 : WINBIND_KRB5_CCACHE_TYPE);
2426 : }
2427 :
2428 238 : static const char *get_member_from_config(struct pwb_context *ctx)
2429 : {
2430 238 : const char *ret = NULL;
2431 238 : ret = get_conf_item_string(ctx, "require_membership_of",
2432 : WINBIND_REQUIRED_MEMBERSHIP);
2433 238 : if (ret != NULL) {
2434 0 : return ret;
2435 : }
2436 238 : return get_conf_item_string(ctx, "require-membership-of",
2437 : WINBIND_REQUIRED_MEMBERSHIP);
2438 : }
2439 :
2440 238 : static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
2441 : {
2442 : int ret;
2443 238 : ret = get_config_item_int(ctx, "warn_pwd_expire",
2444 : WINBIND_WARN_PWD_EXPIRE);
2445 : /* no or broken setting */
2446 238 : if (ret < 0) {
2447 230 : return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
2448 : }
2449 8 : return ret;
2450 : }
2451 :
2452 : /**
2453 : * Retrieve the winbind separator.
2454 : *
2455 : * @param ctx PAM winbind context.
2456 : *
2457 : * @return string separator character. NULL on failure.
2458 : */
2459 :
2460 144 : static char winbind_get_separator(struct pwb_context *ctx)
2461 : {
2462 : wbcErr wbc_status;
2463 : static struct wbcInterfaceDetails *details = NULL;
2464 : char result;
2465 :
2466 144 : wbc_status = wbcCtxInterfaceDetails(ctx->wbc_ctx, &details);
2467 144 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2468 0 : _pam_log(ctx, LOG_ERR,
2469 : "Could not retrieve winbind interface details: %s",
2470 : wbcErrorString(wbc_status));
2471 0 : return '\0';
2472 : }
2473 :
2474 144 : if (!details) {
2475 0 : return '\0';
2476 : }
2477 :
2478 144 : result = details->winbind_separator;
2479 144 : wbcFreeMemory(details);
2480 144 : return result;
2481 : }
2482 :
2483 :
2484 : /**
2485 : * Convert a upn to a name.
2486 : *
2487 : * @param ctx PAM winbind context.
2488 : * @param upn User UPN to be translated.
2489 : *
2490 : * @return converted name. NULL pointer on failure. Caller needs to free.
2491 : */
2492 :
2493 144 : static char* winbind_upn_to_username(struct pwb_context *ctx,
2494 : const char *upn)
2495 : {
2496 : char sep;
2497 144 : wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
2498 : struct wbcDomainSid sid;
2499 : enum wbcSidType type;
2500 144 : char *domain = NULL;
2501 : char *name;
2502 : char *p;
2503 : char *result;
2504 :
2505 : /* This cannot work when the winbind separator = @ */
2506 :
2507 144 : sep = winbind_get_separator(ctx);
2508 144 : if (!sep || sep == '@') {
2509 0 : return NULL;
2510 : }
2511 :
2512 144 : name = talloc_strdup(ctx, upn);
2513 144 : if (!name) {
2514 0 : return NULL;
2515 : }
2516 :
2517 144 : p = strchr(name, '@');
2518 144 : if (p == NULL) {
2519 0 : TALLOC_FREE(name);
2520 0 : return NULL;
2521 : }
2522 144 : *p = '\0';
2523 144 : domain = p + 1;
2524 :
2525 : /* Convert the UPN to a SID */
2526 :
2527 144 : wbc_status = wbcCtxLookupName(ctx->wbc_ctx, domain, name, &sid, &type);
2528 144 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2529 72 : return NULL;
2530 : }
2531 :
2532 : /* Convert the the SID back to the sAMAccountName */
2533 :
2534 72 : wbc_status = wbcCtxLookupSid(ctx->wbc_ctx, &sid, &domain, &name, &type);
2535 72 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2536 0 : return NULL;
2537 : }
2538 :
2539 72 : result = talloc_asprintf(ctx, "%s%c%s", domain, sep, name);
2540 72 : wbcFreeMemory(domain);
2541 72 : wbcFreeMemory(name);
2542 72 : return result;
2543 : }
2544 :
2545 2 : static int _pam_delete_cred(pam_handle_t *pamh, int flags,
2546 : int argc, enum pam_winbind_request_type type,
2547 : const char **argv)
2548 : {
2549 2 : int retval = PAM_SUCCESS;
2550 2 : struct pwb_context *ctx = NULL;
2551 : struct wbcLogoffUserParams logoff;
2552 2 : struct wbcAuthErrorInfo *error = NULL;
2553 : const char *user;
2554 2 : wbcErr wbc_status = WBC_ERR_SUCCESS;
2555 :
2556 2 : ZERO_STRUCT(logoff);
2557 :
2558 2 : retval = _pam_winbind_init_context(pamh, flags, argc, argv, type, &ctx);
2559 2 : if (retval != PAM_SUCCESS) {
2560 0 : return retval;
2561 : }
2562 :
2563 2 : _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
2564 :
2565 2 : if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2566 :
2567 : /* destroy the ccache here */
2568 :
2569 2 : uint32_t wbc_flags = 0;
2570 2 : const char *ccname = NULL;
2571 2 : struct passwd *pwd = NULL;
2572 :
2573 2 : retval = pam_get_user(pamh, &user, _("Username: "));
2574 2 : if (retval != PAM_SUCCESS) {
2575 0 : _pam_log(ctx, LOG_ERR,
2576 : "could not identify user");
2577 0 : goto out;
2578 : }
2579 :
2580 2 : if (user == NULL) {
2581 0 : _pam_log(ctx, LOG_ERR,
2582 : "username was NULL!");
2583 0 : retval = PAM_USER_UNKNOWN;
2584 0 : goto out;
2585 : }
2586 :
2587 2 : _pam_log_debug(ctx, LOG_DEBUG,
2588 : "username [%s] obtained", user);
2589 :
2590 2 : ccname = pam_getenv(pamh, "KRB5CCNAME");
2591 2 : if (ccname == NULL) {
2592 0 : _pam_log_debug(ctx, LOG_DEBUG,
2593 : "user has no KRB5CCNAME environment");
2594 : }
2595 :
2596 2 : pwd = getpwnam(user);
2597 2 : if (pwd == NULL) {
2598 0 : retval = PAM_USER_UNKNOWN;
2599 0 : goto out;
2600 : }
2601 :
2602 2 : wbc_flags = WBFLAG_PAM_KRB5 |
2603 : WBFLAG_PAM_CONTACT_TRUSTDOM;
2604 :
2605 2 : logoff.username = user;
2606 :
2607 2 : if (ccname) {
2608 2 : wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2609 : &logoff.blobs,
2610 : "ccfilename",
2611 : 0,
2612 : discard_const_p(uint8_t, ccname),
2613 2 : strlen(ccname)+1);
2614 2 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2615 0 : goto out;
2616 : }
2617 : }
2618 :
2619 2 : wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2620 : &logoff.blobs,
2621 : "flags",
2622 : 0,
2623 : (uint8_t *)&wbc_flags,
2624 : sizeof(wbc_flags));
2625 2 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2626 0 : goto out;
2627 : }
2628 :
2629 2 : wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2630 : &logoff.blobs,
2631 : "user_uid",
2632 : 0,
2633 2 : (uint8_t *)&pwd->pw_uid,
2634 : sizeof(pwd->pw_uid));
2635 2 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2636 0 : goto out;
2637 : }
2638 :
2639 2 : wbc_status = wbcCtxLogoffUserEx(ctx->wbc_ctx, &logoff, &error);
2640 2 : retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2641 : user, "wbcLogoffUser");
2642 2 : wbcFreeMemory(logoff.blobs);
2643 2 : logoff.blobs = NULL;
2644 :
2645 2 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2646 0 : _pam_log(ctx, LOG_INFO,
2647 : "failed to logoff user %s: %s\n",
2648 : user, wbcErrorString(wbc_status));
2649 : }
2650 : }
2651 :
2652 0 : out:
2653 2 : if (logoff.blobs) {
2654 0 : wbcFreeMemory(logoff.blobs);
2655 : }
2656 :
2657 2 : if (!WBC_ERROR_IS_OK(wbc_status)) {
2658 0 : retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2659 : user, "wbcLogoffUser");
2660 : }
2661 2 : wbcFreeMemory(error);
2662 :
2663 : /*
2664 : * Delete the krb5 ccname variable from the PAM environment
2665 : * if it was set by winbind.
2666 : */
2667 2 : if ((ctx->ctrl & WINBIND_KRB5_AUTH) && pam_getenv(pamh, "KRB5CCNAME")) {
2668 2 : pam_putenv(pamh, "KRB5CCNAME");
2669 : }
2670 :
2671 2 : _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx, retval);
2672 :
2673 2 : TALLOC_FREE(ctx);
2674 :
2675 2 : return retval;
2676 : }
2677 :
2678 : #ifdef SECURITY_OPENPAM_H_INCLUDED
2679 : /*
2680 : * Logic below is copied from openpam_check_error_code() in
2681 : *./contrib/openpam/lib/libpam/openpam_dispatch.c on FreeBSD.
2682 : */
2683 : static int openpam_convert_error_code(struct pwb_context *ctx,
2684 : enum pam_winbind_request_type req,
2685 : int r)
2686 : {
2687 : if (r == PAM_SUCCESS ||
2688 : r == PAM_SYSTEM_ERR ||
2689 : r == PAM_SERVICE_ERR ||
2690 : r == PAM_BUF_ERR ||
2691 : r == PAM_CONV_ERR ||
2692 : r == PAM_PERM_DENIED ||
2693 : r == PAM_ABORT) {
2694 : return r;
2695 : }
2696 :
2697 : /* specific winbind request types */
2698 : switch (req) {
2699 : case PAM_WINBIND_AUTHENTICATE:
2700 : if (r == PAM_AUTH_ERR ||
2701 : r == PAM_CRED_INSUFFICIENT ||
2702 : r == PAM_AUTHINFO_UNAVAIL ||
2703 : r == PAM_USER_UNKNOWN ||
2704 : r == PAM_MAXTRIES) {
2705 : return r;
2706 : }
2707 : break;
2708 : case PAM_WINBIND_SETCRED:
2709 : if (r == PAM_CRED_UNAVAIL ||
2710 : r == PAM_CRED_EXPIRED ||
2711 : r == PAM_USER_UNKNOWN ||
2712 : r == PAM_CRED_ERR) {
2713 : return r;
2714 : }
2715 : break;
2716 : case PAM_WINBIND_ACCT_MGMT:
2717 : if (r == PAM_USER_UNKNOWN ||
2718 : r == PAM_AUTH_ERR ||
2719 : r == PAM_NEW_AUTHTOK_REQD ||
2720 : r == PAM_ACCT_EXPIRED) {
2721 : return r;
2722 : }
2723 : break;
2724 : case PAM_WINBIND_OPEN_SESSION:
2725 : case PAM_WINBIND_CLOSE_SESSION:
2726 : if (r == PAM_SESSION_ERR) {
2727 : return r;
2728 : }
2729 : break;
2730 : case PAM_WINBIND_CHAUTHTOK:
2731 : if (r == PAM_PERM_DENIED ||
2732 : r == PAM_AUTHTOK_ERR ||
2733 : r == PAM_AUTHTOK_RECOVERY_ERR ||
2734 : r == PAM_AUTHTOK_LOCK_BUSY ||
2735 : r == PAM_AUTHTOK_DISABLE_AGING ||
2736 : r == PAM_TRY_AGAIN) {
2737 : return r;
2738 : }
2739 : break;
2740 : default:
2741 : break;
2742 : }
2743 : _pam_log(ctx, LOG_INFO,
2744 : "Converting PAM error [%d] to PAM_SERVICE_ERR.\n", r);
2745 : return PAM_SERVICE_ERR;
2746 : };
2747 : #define pam_error_code(a, b, c) openpam_convert_error_code(a, b, c)
2748 : #else
2749 : #define pam_error_code(a, b, c) (c)
2750 : #endif
2751 :
2752 : _PUBLIC_ PAM_EXTERN
2753 : int pam_sm_authenticate(pam_handle_t *pamh, int flags,
2754 : int argc, const char **argv)
2755 : {
2756 : const char *username;
2757 : const char *password;
2758 238 : const char *member = NULL;
2759 238 : const char *cctype = NULL;
2760 : int warn_pwd_expire;
2761 238 : int retval = PAM_AUTH_ERR;
2762 238 : char *username_ret = NULL;
2763 238 : char *new_authtok_required = NULL;
2764 238 : char *real_username = NULL;
2765 238 : struct pwb_context *ctx = NULL;
2766 :
2767 238 : retval = _pam_winbind_init_context(pamh, flags, argc, argv,
2768 : PAM_WINBIND_AUTHENTICATE, &ctx);
2769 238 : if (retval != PAM_SUCCESS) {
2770 0 : return retval;
2771 : }
2772 :
2773 238 : _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
2774 :
2775 : /* Get the username */
2776 238 : retval = pam_get_user(pamh, &username, NULL);
2777 238 : if ((retval != PAM_SUCCESS) || (!username)) {
2778 0 : _pam_log_debug(ctx, LOG_DEBUG,
2779 : "can not get the username");
2780 0 : retval = PAM_SERVICE_ERR;
2781 0 : goto out;
2782 : }
2783 :
2784 :
2785 : #if defined(AIX)
2786 : /* Decode the user name since AIX does not support logn user
2787 : names by default. The name is encoded as _#uid. */
2788 :
2789 : if (username[0] == '_') {
2790 : uid_t id = atoi(&username[1]);
2791 : struct passwd *pw = NULL;
2792 :
2793 : if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
2794 : real_username = strdup(pw->pw_name);
2795 : }
2796 : }
2797 : #endif
2798 :
2799 238 : if (!real_username) {
2800 : /* Just making a copy of the username we got from PAM */
2801 238 : if ((real_username = strdup(username)) == NULL) {
2802 0 : _pam_log_debug(ctx, LOG_DEBUG,
2803 : "memory allocation failure when copying "
2804 : "username");
2805 0 : retval = PAM_SERVICE_ERR;
2806 0 : goto out;
2807 : }
2808 : }
2809 :
2810 : /* Maybe this was a UPN */
2811 :
2812 238 : if (strchr(real_username, '@') != NULL) {
2813 144 : char *samaccountname = NULL;
2814 :
2815 144 : samaccountname = winbind_upn_to_username(ctx,
2816 : real_username);
2817 144 : if (samaccountname) {
2818 72 : free(real_username);
2819 72 : real_username = strdup(samaccountname);
2820 : }
2821 : }
2822 :
2823 238 : retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
2824 238 : _("Password: "), NULL,
2825 : &password);
2826 :
2827 238 : if (retval != PAM_SUCCESS) {
2828 0 : _pam_log(ctx, LOG_ERR,
2829 : "Could not retrieve user's password");
2830 0 : retval = PAM_AUTHTOK_ERR;
2831 0 : goto out;
2832 : }
2833 :
2834 : /* Let's not give too much away in the log file */
2835 :
2836 : #ifdef DEBUG_PASSWORD
2837 238 : _pam_log_debug(ctx, LOG_INFO,
2838 : "Verify user '%s' with password '%s'",
2839 : real_username, password);
2840 : #else
2841 : _pam_log_debug(ctx, LOG_INFO,
2842 : "Verify user '%s'", real_username);
2843 : #endif
2844 :
2845 238 : member = get_member_from_config(ctx);
2846 238 : cctype = get_krb5_cc_type_from_config(ctx);
2847 238 : warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2848 :
2849 : /* Now use the username to look up password */
2850 238 : retval = winbind_auth_request(ctx, real_username, password,
2851 : member, cctype, warn_pwd_expire,
2852 : NULL, NULL, NULL, &username_ret);
2853 :
2854 238 : if (retval == PAM_NEW_AUTHTOK_REQD ||
2855 : retval == PAM_AUTHTOK_EXPIRED) {
2856 :
2857 0 : char *new_authtok_required_during_auth = NULL;
2858 :
2859 0 : new_authtok_required = talloc_asprintf(NULL, "%d", retval);
2860 0 : if (!new_authtok_required) {
2861 0 : retval = PAM_BUF_ERR;
2862 0 : goto out;
2863 : }
2864 :
2865 0 : pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2866 : new_authtok_required,
2867 : _pam_winbind_cleanup_func);
2868 :
2869 0 : retval = PAM_SUCCESS;
2870 :
2871 0 : new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
2872 0 : if (!new_authtok_required_during_auth) {
2873 0 : retval = PAM_BUF_ERR;
2874 0 : goto out;
2875 : }
2876 :
2877 0 : pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2878 : new_authtok_required_during_auth,
2879 : _pam_winbind_cleanup_func);
2880 :
2881 0 : goto out;
2882 : }
2883 :
2884 238 : out:
2885 238 : if (username_ret) {
2886 162 : pam_set_item (pamh, PAM_USER, username_ret);
2887 162 : _pam_log_debug(ctx, LOG_INFO,
2888 : "Returned user was '%s'", username_ret);
2889 162 : free(username_ret);
2890 : }
2891 :
2892 238 : if (real_username) {
2893 238 : free(real_username);
2894 : }
2895 :
2896 238 : if (!new_authtok_required) {
2897 238 : pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2898 : }
2899 :
2900 238 : if (retval != PAM_SUCCESS) {
2901 76 : _pam_free_data_info3(pamh);
2902 : }
2903 :
2904 238 : _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
2905 :
2906 238 : TALLOC_FREE(ctx);
2907 :
2908 238 : return retval;
2909 : }
2910 :
2911 : _PUBLIC_ PAM_EXTERN
2912 : int pam_sm_setcred(pam_handle_t *pamh, int flags,
2913 : int argc, const char **argv)
2914 : {
2915 2 : int ret = PAM_SYSTEM_ERR;
2916 2 : struct pwb_context *ctx = NULL;
2917 :
2918 2 : ret = _pam_winbind_init_context(pamh, flags, argc, argv,
2919 : PAM_WINBIND_SETCRED, &ctx);
2920 2 : if (ret != PAM_SUCCESS) {
2921 0 : return ret;
2922 : }
2923 :
2924 2 : _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
2925 :
2926 2 : switch (flags & ~PAM_SILENT) {
2927 :
2928 2 : case PAM_DELETE_CRED:
2929 2 : ret = _pam_delete_cred(pamh, flags, argc,
2930 : PAM_WINBIND_SETCRED, argv);
2931 2 : break;
2932 0 : case PAM_REFRESH_CRED:
2933 0 : _pam_log_debug(ctx, LOG_WARNING,
2934 : "PAM_REFRESH_CRED not implemented");
2935 0 : ret = PAM_SUCCESS;
2936 0 : break;
2937 0 : case PAM_REINITIALIZE_CRED:
2938 0 : _pam_log_debug(ctx, LOG_WARNING,
2939 : "PAM_REINITIALIZE_CRED not implemented");
2940 0 : ret = PAM_SUCCESS;
2941 0 : break;
2942 0 : case PAM_ESTABLISH_CRED:
2943 0 : _pam_log_debug(ctx, LOG_WARNING,
2944 : "PAM_ESTABLISH_CRED not implemented");
2945 0 : ret = PAM_SUCCESS;
2946 0 : break;
2947 0 : default:
2948 0 : ret = PAM_SYSTEM_ERR;
2949 0 : break;
2950 : }
2951 :
2952 2 : _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
2953 :
2954 2 : TALLOC_FREE(ctx);
2955 :
2956 2 : return pam_error_code(ctx, PAM_WINBIND_SETCRED, ret);
2957 : }
2958 :
2959 : /*
2960 : * Account management. We want to verify that the account exists
2961 : * before returning PAM_SUCCESS
2962 : */
2963 : _PUBLIC_ PAM_EXTERN
2964 : int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2965 : int argc, const char **argv)
2966 : {
2967 : const char *username;
2968 0 : int ret = PAM_USER_UNKNOWN;
2969 0 : const char *tmp = NULL;
2970 0 : struct pwb_context *ctx = NULL;
2971 :
2972 0 : ret = _pam_winbind_init_context(pamh, flags, argc, argv,
2973 : PAM_WINBIND_ACCT_MGMT, &ctx);
2974 0 : if (ret != PAM_SUCCESS) {
2975 0 : return ret;
2976 : }
2977 :
2978 0 : _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
2979 :
2980 :
2981 : /* Get the username */
2982 0 : ret = pam_get_user(pamh, &username, NULL);
2983 0 : if ((ret != PAM_SUCCESS) || (!username)) {
2984 0 : _pam_log_debug(ctx, LOG_DEBUG,
2985 : "can not get the username");
2986 0 : ret = PAM_SERVICE_ERR;
2987 0 : goto out;
2988 : }
2989 :
2990 : /* Verify the username */
2991 0 : ret = valid_user(ctx, username);
2992 0 : switch (ret) {
2993 0 : case -1:
2994 : /* some sort of system error. The log was already printed */
2995 0 : ret = PAM_SERVICE_ERR;
2996 0 : goto out;
2997 0 : case 1:
2998 : /* the user does not exist */
2999 0 : _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
3000 : username);
3001 0 : if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
3002 0 : ret = PAM_IGNORE;
3003 0 : goto out;
3004 : }
3005 0 : ret = PAM_USER_UNKNOWN;
3006 0 : goto out;
3007 0 : case 0:
3008 0 : pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
3009 : (const void **)&tmp);
3010 0 : if (tmp != NULL) {
3011 0 : ret = atoi(tmp);
3012 0 : switch (ret) {
3013 0 : case PAM_AUTHTOK_EXPIRED:
3014 : /* Since new token is required in this case */
3015 : FALL_THROUGH;
3016 : case PAM_NEW_AUTHTOK_REQD:
3017 0 : _pam_log(ctx, LOG_WARNING,
3018 : "pam_sm_acct_mgmt success but %s is set",
3019 : PAM_WINBIND_NEW_AUTHTOK_REQD);
3020 0 : _pam_log(ctx, LOG_NOTICE,
3021 : "user '%s' needs new password",
3022 : username);
3023 : /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
3024 0 : ret = PAM_NEW_AUTHTOK_REQD;
3025 0 : goto out;
3026 0 : default:
3027 0 : _pam_log(ctx, LOG_WARNING,
3028 : "pam_sm_acct_mgmt success");
3029 0 : _pam_log(ctx, LOG_NOTICE,
3030 : "user '%s' granted access", username);
3031 0 : ret = PAM_SUCCESS;
3032 0 : goto out;
3033 : }
3034 : }
3035 :
3036 : /* Otherwise, the authentication looked good */
3037 0 : _pam_log(ctx, LOG_NOTICE,
3038 : "user '%s' granted access", username);
3039 0 : ret = PAM_SUCCESS;
3040 0 : goto out;
3041 0 : default:
3042 : /* we don't know anything about this return value */
3043 0 : _pam_log(ctx, LOG_ERR,
3044 : "internal module error (ret = %d, user = '%s')",
3045 : ret, username);
3046 0 : ret = PAM_SERVICE_ERR;
3047 0 : goto out;
3048 : }
3049 :
3050 : /* should not be reached */
3051 : ret = PAM_IGNORE;
3052 :
3053 0 : out:
3054 :
3055 0 : _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
3056 :
3057 0 : TALLOC_FREE(ctx);
3058 :
3059 0 : return pam_error_code(ctx, PAM_WINBIND_ACCT_MGMT, ret);
3060 : }
3061 :
3062 : _PUBLIC_ PAM_EXTERN
3063 : int pam_sm_open_session(pam_handle_t *pamh, int flags,
3064 : int argc, const char **argv)
3065 : {
3066 0 : int ret = PAM_SUCCESS;
3067 0 : struct pwb_context *ctx = NULL;
3068 :
3069 0 : ret = _pam_winbind_init_context(pamh, flags, argc, argv,
3070 : PAM_WINBIND_OPEN_SESSION, &ctx);
3071 0 : if (ret != PAM_SUCCESS) {
3072 0 : return ret;
3073 : }
3074 :
3075 0 : _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
3076 :
3077 0 : if (ctx->ctrl & WINBIND_MKHOMEDIR) {
3078 : /* check and create homedir */
3079 0 : ret = _pam_mkhomedir(ctx);
3080 : }
3081 :
3082 0 : _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
3083 :
3084 0 : TALLOC_FREE(ctx);
3085 :
3086 0 : return pam_error_code(ctx, PAM_WINBIND_OPEN_SESSION, ret);
3087 : }
3088 :
3089 : _PUBLIC_ PAM_EXTERN
3090 : int pam_sm_close_session(pam_handle_t *pamh, int flags,
3091 : int argc, const char **argv)
3092 : {
3093 0 : int ret = PAM_SUCCESS;
3094 0 : struct pwb_context *ctx = NULL;
3095 :
3096 0 : ret = _pam_winbind_init_context(pamh, flags, argc, argv,
3097 : PAM_WINBIND_CLOSE_SESSION, &ctx);
3098 0 : if (ret != PAM_SUCCESS) {
3099 0 : return ret;
3100 : }
3101 :
3102 0 : _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
3103 :
3104 0 : _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
3105 :
3106 0 : TALLOC_FREE(ctx);
3107 :
3108 0 : return pam_error_code(ctx, PAM_WINBIND_CLOSE_SESSION, ret);
3109 : }
3110 :
3111 : /**
3112 : * evaluate whether we need to re-authenticate with kerberos after a
3113 : * password change
3114 : *
3115 : * @param ctx PAM winbind context.
3116 : * @param user The username
3117 : *
3118 : * @return boolean Returns true if required, false if not.
3119 : */
3120 :
3121 12 : static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
3122 : const char *user)
3123 : {
3124 :
3125 : /* Make sure that we only do this if a) the chauthtok got initiated
3126 : * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
3127 : * later password change via the "passwd" command if done by the user
3128 : * itself
3129 : * NB. If we login from gdm or xdm and the password expires,
3130 : * we change the password, but there is no memory cache.
3131 : * Thus, even for passthrough login, we should do the
3132 : * authentication again to update memory cache.
3133 : * --- BoYang
3134 : * */
3135 :
3136 12 : const char *new_authtok_reqd_during_auth = NULL;
3137 12 : struct passwd *pwd = NULL;
3138 :
3139 12 : pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
3140 : (const void **) &new_authtok_reqd_during_auth);
3141 12 : pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
3142 : NULL, NULL);
3143 :
3144 12 : if (new_authtok_reqd_during_auth) {
3145 0 : return true;
3146 : }
3147 :
3148 12 : pwd = getpwnam(user);
3149 12 : if (!pwd) {
3150 0 : return false;
3151 : }
3152 :
3153 12 : if (getuid() == pwd->pw_uid) {
3154 0 : return true;
3155 : }
3156 :
3157 12 : return false;
3158 : }
3159 :
3160 :
3161 : _PUBLIC_ PAM_EXTERN
3162 : int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
3163 : int argc, const char **argv)
3164 : {
3165 : unsigned int lctrl;
3166 : int ret;
3167 24 : bool cached_login = false;
3168 :
3169 : /* <DO NOT free() THESE> */
3170 : const char *user;
3171 : const char *pass_old;
3172 : const char *pass_new;
3173 : /* </DO NOT free() THESE> */
3174 :
3175 : char *Announce;
3176 :
3177 24 : int retry = 0;
3178 24 : char *username_ret = NULL;
3179 24 : struct wbcAuthErrorInfo *error = NULL;
3180 24 : struct pwb_context *ctx = NULL;
3181 :
3182 24 : ret = _pam_winbind_init_context(pamh, flags, argc, argv,
3183 : PAM_WINBIND_CHAUTHTOK, &ctx);
3184 24 : if (ret != PAM_SUCCESS) {
3185 0 : return ret;
3186 : }
3187 :
3188 24 : _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
3189 :
3190 24 : cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
3191 :
3192 : /* clearing offline bit for auth */
3193 24 : ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
3194 :
3195 : /*
3196 : * First get the name of a user
3197 : */
3198 24 : ret = pam_get_user(pamh, &user, _("Username: "));
3199 24 : if (ret != PAM_SUCCESS) {
3200 0 : _pam_log(ctx, LOG_ERR,
3201 : "password - could not identify user");
3202 0 : goto out;
3203 : }
3204 :
3205 24 : if (user == NULL) {
3206 0 : _pam_log(ctx, LOG_ERR, "username was NULL!");
3207 0 : ret = PAM_USER_UNKNOWN;
3208 0 : goto out;
3209 : }
3210 :
3211 24 : _pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
3212 :
3213 : /* check if this is really a user in winbindd, not only in NSS */
3214 24 : ret = valid_user(ctx, user);
3215 24 : switch (ret) {
3216 0 : case 1:
3217 0 : ret = PAM_USER_UNKNOWN;
3218 0 : goto out;
3219 0 : case -1:
3220 0 : ret = PAM_SYSTEM_ERR;
3221 0 : goto out;
3222 24 : default:
3223 24 : break;
3224 : }
3225 :
3226 : /*
3227 : * obtain and verify the current password (OLDAUTHTOK) for
3228 : * the user.
3229 : */
3230 :
3231 24 : if (flags & PAM_PRELIM_CHECK) {
3232 12 : time_t *pwdlastset_prelim = NULL;
3233 :
3234 12 : pwdlastset_prelim = talloc_zero(NULL, time_t);
3235 12 : if (pwdlastset_prelim == NULL) {
3236 0 : _pam_log(ctx, LOG_CRIT,
3237 : "password - out of memory");
3238 0 : ret = PAM_BUF_ERR;
3239 0 : goto out;
3240 : }
3241 :
3242 : /* instruct user what is happening */
3243 :
3244 : #define greeting _("Changing password for")
3245 12 : Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
3246 12 : if (!Announce) {
3247 0 : _pam_log(ctx, LOG_CRIT,
3248 : "password - out of memory");
3249 0 : ret = PAM_BUF_ERR;
3250 0 : goto out;
3251 : }
3252 : #undef greeting
3253 :
3254 12 : lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
3255 12 : ret = _winbind_read_password(ctx, lctrl,
3256 : Announce,
3257 12 : _("(current) NT password: "),
3258 : NULL,
3259 : (const char **) &pass_old);
3260 12 : TALLOC_FREE(Announce);
3261 12 : if (ret != PAM_SUCCESS) {
3262 0 : _pam_log(ctx, LOG_NOTICE,
3263 : "password - (old) token not obtained");
3264 0 : goto out;
3265 : }
3266 :
3267 : /* verify that this is the password for this user */
3268 :
3269 12 : ret = winbind_auth_request(ctx, user, pass_old,
3270 : NULL, NULL, 0,
3271 : &error, NULL,
3272 : pwdlastset_prelim, NULL);
3273 :
3274 12 : if (ret != PAM_ACCT_EXPIRED &&
3275 12 : ret != PAM_AUTHTOK_EXPIRED &&
3276 12 : ret != PAM_NEW_AUTHTOK_REQD &&
3277 : ret != PAM_SUCCESS) {
3278 0 : pass_old = NULL;
3279 0 : goto out;
3280 : }
3281 :
3282 12 : pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3283 : pwdlastset_prelim,
3284 : _pam_winbind_cleanup_func);
3285 :
3286 12 : ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
3287 : (const void *) pass_old);
3288 12 : pass_old = NULL;
3289 12 : if (ret != PAM_SUCCESS) {
3290 0 : _pam_log(ctx, LOG_CRIT,
3291 : "failed to set PAM_OLDAUTHTOK");
3292 : }
3293 12 : } else if (flags & PAM_UPDATE_AUTHTOK) {
3294 12 : const time_t *pwdlastset_update = NULL;
3295 :
3296 : /*
3297 : * obtain the proposed password
3298 : */
3299 :
3300 : /*
3301 : * get the old token back.
3302 : */
3303 :
3304 12 : ret = pam_get_item(pamh, PAM_OLDAUTHTOK, (const void **) &pass_old);
3305 :
3306 12 : if (ret != PAM_SUCCESS) {
3307 0 : _pam_log(ctx, LOG_NOTICE,
3308 : "user not authenticated");
3309 0 : goto out;
3310 : }
3311 :
3312 12 : lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
3313 :
3314 12 : if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
3315 4 : lctrl |= WINBIND_USE_FIRST_PASS_ARG;
3316 : }
3317 12 : if (on(WINBIND_TRY_AUTHTOK_ARG, lctrl)) {
3318 4 : lctrl |= WINBIND_TRY_FIRST_PASS_ARG;
3319 : }
3320 12 : retry = 0;
3321 12 : ret = PAM_AUTHTOK_ERR;
3322 24 : while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
3323 : /*
3324 : * use_authtok is to force the use of a previously entered
3325 : * password -- needed for pluggable password strength checking
3326 : */
3327 :
3328 12 : ret = _winbind_read_password(ctx, lctrl,
3329 : NULL,
3330 12 : _("Enter new NT password: "),
3331 12 : _("Retype new NT password: "),
3332 : (const char **)&pass_new);
3333 :
3334 12 : if (ret != PAM_SUCCESS) {
3335 0 : _pam_log_debug(ctx, LOG_ALERT,
3336 : "password - "
3337 : "new password not obtained");
3338 0 : pass_old = NULL;/* tidy up */
3339 0 : goto out;
3340 : }
3341 :
3342 : /*
3343 : * At this point we know who the user is and what they
3344 : * propose as their new password. Verify that the new
3345 : * password is acceptable.
3346 : */
3347 :
3348 12 : if (pass_new[0] == '\0') {/* "\0" password = NULL */
3349 0 : pass_new = NULL;
3350 : }
3351 : }
3352 :
3353 : /*
3354 : * By reaching here we have approved the passwords and must now
3355 : * rebuild the password database file.
3356 : */
3357 12 : pam_get_data(pamh,
3358 : PAM_WINBIND_PWD_LAST_SET,
3359 : (const void **)(&pwdlastset_update));
3360 :
3361 : /*
3362 : * if cached creds were enabled, make sure to set the
3363 : * WINBIND_CACHED_LOGIN bit here in order to have winbindd
3364 : * update the cached creds storage - gd
3365 : */
3366 12 : if (cached_login) {
3367 0 : ctx->ctrl |= WINBIND_CACHED_LOGIN;
3368 : }
3369 :
3370 12 : ret = winbind_chauthtok_request(ctx, user, pass_old,
3371 : pass_new, *pwdlastset_update);
3372 12 : if (ret != PAM_SUCCESS) {
3373 0 : pass_old = pass_new = NULL;
3374 0 : goto out;
3375 : }
3376 :
3377 12 : if (_pam_require_krb5_auth_after_chauthtok(ctx, user)) {
3378 :
3379 0 : const char *member = NULL;
3380 0 : const char *cctype = NULL;
3381 : int warn_pwd_expire;
3382 0 : struct wbcLogonUserInfo *info = NULL;
3383 :
3384 0 : member = get_member_from_config(ctx);
3385 0 : cctype = get_krb5_cc_type_from_config(ctx);
3386 0 : warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
3387 :
3388 : /* Keep WINBIND_CACHED_LOGIN bit for
3389 : * authentication after changing the password.
3390 : * This will update the cached credentials in case
3391 : * that winbindd_dual_pam_chauthtok() fails
3392 : * to update them.
3393 : * --- BoYang
3394 : * */
3395 :
3396 0 : ret = winbind_auth_request(ctx, user, pass_new,
3397 : member, cctype, 0,
3398 : &error, &info,
3399 : NULL, &username_ret);
3400 0 : pass_old = pass_new = NULL;
3401 :
3402 0 : if (ret == PAM_SUCCESS) {
3403 :
3404 0 : struct wbcAuthUserInfo *user_info = NULL;
3405 :
3406 0 : if (info && info->info) {
3407 0 : user_info = info->info;
3408 : }
3409 :
3410 : /* warn a user if the password is about to
3411 : * expire soon */
3412 0 : _pam_warn_password_expiry(ctx, user_info,
3413 : warn_pwd_expire,
3414 : NULL, NULL);
3415 :
3416 : /* set some info3 info for other modules in the
3417 : * stack */
3418 0 : _pam_set_data_info3(ctx, user_info);
3419 :
3420 : /* put krb5ccname into env */
3421 0 : _pam_setup_krb5_env(ctx, info);
3422 :
3423 0 : if (username_ret) {
3424 0 : pam_set_item(pamh, PAM_USER,
3425 : username_ret);
3426 0 : _pam_log_debug(ctx, LOG_INFO,
3427 : "Returned user was '%s'",
3428 : username_ret);
3429 0 : free(username_ret);
3430 : }
3431 :
3432 : }
3433 :
3434 0 : if (info && info->blobs) {
3435 0 : wbcFreeMemory(info->blobs);
3436 : }
3437 0 : wbcFreeMemory(info);
3438 :
3439 0 : goto out;
3440 : }
3441 : } else {
3442 0 : ret = PAM_SERVICE_ERR;
3443 : }
3444 :
3445 24 : out:
3446 : {
3447 : /* Deal with offline errors. */
3448 : int i;
3449 24 : const char *codes[] = {
3450 : "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3451 : "NT_STATUS_NO_LOGON_SERVERS",
3452 : "NT_STATUS_ACCESS_DENIED"
3453 : };
3454 :
3455 96 : for (i=0; i<ARRAY_SIZE(codes); i++) {
3456 : int _ret;
3457 72 : if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
3458 0 : break;
3459 : }
3460 : }
3461 : }
3462 :
3463 24 : wbcFreeMemory(error);
3464 :
3465 24 : _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
3466 :
3467 24 : TALLOC_FREE(ctx);
3468 :
3469 24 : return pam_error_code(ctx, PAM_WINBIND_CHAUTHTOK, ret);
3470 : }
3471 :
3472 : #ifdef PAM_STATIC
3473 :
3474 : /* static module data */
3475 :
3476 : struct pam_module _pam_winbind_modstruct = {
3477 : MODULE_NAME,
3478 : pam_sm_authenticate,
3479 : pam_sm_setcred,
3480 : pam_sm_acct_mgmt,
3481 : pam_sm_open_session,
3482 : pam_sm_close_session,
3483 : pam_sm_chauthtok
3484 : };
3485 :
3486 : #endif
3487 :
3488 : /*
3489 : * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3490 : * Copyright (c) Tim Potter <tpot@samba.org> 2000
3491 : * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3492 : * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3493 : * Copyright (c) Jan Rêkorajski 1999.
3494 : * Copyright (c) Andrew G. Morgan 1996-8.
3495 : * Copyright (c) Alex O. Yuriev, 1996.
3496 : * Copyright (c) Cristian Gafton 1996.
3497 : * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3498 : *
3499 : * Redistribution and use in source and binary forms, with or without
3500 : * modification, are permitted provided that the following conditions
3501 : * are met:
3502 : * 1. Redistributions of source code must retain the above copyright
3503 : * notice, and the entire permission notice in its entirety,
3504 : * including the disclaimer of warranties.
3505 : * 2. Redistributions in binary form must reproduce the above copyright
3506 : * notice, this list of conditions and the following disclaimer in the
3507 : * documentation and/or other materials provided with the distribution.
3508 : * 3. The name of the author may not be used to endorse or promote
3509 : * products derived from this software without specific prior
3510 : * written permission.
3511 : *
3512 : * ALTERNATIVELY, this product may be distributed under the terms of
3513 : * the GNU Public License, in which case the provisions of the GPL are
3514 : * required INSTEAD OF the above restrictions. (This clause is
3515 : * necessary due to a potential bad interaction between the GPL and
3516 : * the restrictions contained in a BSD-style copyright.)
3517 : *
3518 : * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3519 : * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3520 : * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3521 : * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3522 : * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3523 : * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3524 : * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3525 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3526 : * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3527 : * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3528 : * OF THE POSSIBILITY OF SUCH DAMAGE.
3529 : */
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