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clikrb5: don't use krb5_keyblock_init() when no salt is specified
[Samba/bb.git] / source / libsmb / clikrb5.c
blobd5d7c1f3b9d908ba3d39cdd7e7411114c6a89508
1 /*
2 Unix SMB/CIFS implementation.
3 simple kerberos5 routines for active directory
4 Copyright (C) Andrew Tridgell 2001
5 Copyright (C) Luke Howard 2002-2003
6 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
7 Copyright (C) Guenther Deschner 2005-2007
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23 #define KRB5_PRIVATE 1 /* this file uses PRIVATE interfaces! */
24 #define KRB5_DEPRECATED 1 /* this file uses DEPRECATED interfaces! */
25
26 #include "includes.h"
27
28 #ifdef HAVE_KRB5
29
30 #ifdef HAVE_KRB5_KEYBLOCK_KEYVALUE /* Heimdal */
31 #define KRB5_KEY_TYPE(k) ((k)->keytype)
32 #define KRB5_KEY_LENGTH(k) ((k)->keyvalue.length)
33 #define KRB5_KEY_DATA(k) ((k)->keyvalue.data)
34 #define KRB5_KEY_DATA_CAST void
35 #else /* MIT */
36 #define KRB5_KEY_TYPE(k) ((k)->enctype)
37 #define KRB5_KEY_LENGTH(k) ((k)->length)
38 #define KRB5_KEY_DATA(k) ((k)->contents)
39 #define KRB5_KEY_DATA_CAST krb5_octet
40 #endif /* HAVE_KRB5_KEYBLOCK_KEYVALUE */
41
42 /**************************************************************
43 Wrappers around kerberos string functions that convert from
44 utf8 -> unix charset and vica versa.
45 **************************************************************/
46
47 /**************************************************************
48 krb5_parse_name that takes a UNIX charset.
49 **************************************************************/
50
51 krb5_error_code smb_krb5_parse_name(krb5_context context,
52 const char *name, /* in unix charset */
53 krb5_principal *principal)
54 {
55 krb5_error_code ret;
56 char *utf8_name;
57 size_t converted_size;
58
59 if (!push_utf8_allocate(&utf8_name, name, &converted_size)) {
60 return ENOMEM;
61 }
62
63 ret = krb5_parse_name(context, utf8_name, principal);
64 SAFE_FREE(utf8_name);
65 return ret;
66 }
67
68 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
69 /**************************************************************
70 krb5_parse_name_norealm that takes a UNIX charset.
71 **************************************************************/
72
73 static krb5_error_code smb_krb5_parse_name_norealm_conv(krb5_context context,
74 const char *name, /* in unix charset */
75 krb5_principal *principal)
76 {
77 krb5_error_code ret;
78 char *utf8_name;
79 size_t converted_size;
80
81 *principal = NULL;
82 if (!push_utf8_allocate(&utf8_name, name, &converted_size)) {
83 return ENOMEM;
84 }
85
86 ret = krb5_parse_name_norealm(context, utf8_name, principal);
87 SAFE_FREE(utf8_name);
88 return ret;
89 }
90 #endif
91
92 /**************************************************************
93 krb5_parse_name that returns a UNIX charset name. Must
94 be freed with normal free() call.
95 **************************************************************/
96
97 krb5_error_code smb_krb5_unparse_name(krb5_context context,
98 krb5_const_principal principal,
99 char **unix_name)
100 {
101 krb5_error_code ret;
102 char *utf8_name;
103 size_t converted_size;
104
105 *unix_name = NULL;
106 ret = krb5_unparse_name(context, principal, &utf8_name);
107 if (ret) {
108 return ret;
109 }
110
111 if (!pull_utf8_allocate(unix_name, utf8_name, &converted_size)) {
112 krb5_free_unparsed_name(context, utf8_name);
113 return ENOMEM;
114 }
115 krb5_free_unparsed_name(context, utf8_name);
116 return 0;
117 }
118
119 #ifndef HAVE_KRB5_SET_REAL_TIME
120 /*
121 * This function is not in the Heimdal mainline.
122 */
123 krb5_error_code krb5_set_real_time(krb5_context context, int32_t seconds, int32_t microseconds)
124 {
125 krb5_error_code ret;
126 int32_t sec, usec;
127
128 ret = krb5_us_timeofday(context, &sec, &usec);
129 if (ret)
130 return ret;
131
132 context->kdc_sec_offset = seconds - sec;
133 context->kdc_usec_offset = microseconds - usec;
134
135 return 0;
136 }
137 #endif
138
139 #if !defined(HAVE_KRB5_SET_DEFAULT_TGS_KTYPES)
140
141 #if defined(HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES)
142
143 /* With MIT kerberos, we should use krb5_set_default_tgs_enctypes in preference
144 * to krb5_set_default_tgs_ktypes. See
145 * http://lists.samba.org/archive/samba-technical/2006-July/048271.html
146 *
147 * If the MIT libraries are not exporting internal symbols, we will end up in
148 * this branch, which is correct. Otherwise we will continue to use the
149 * internal symbol
150 */
151 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
152 {
153 return krb5_set_default_tgs_enctypes(ctx, enc);
154 }
155
156 #elif defined(HAVE_KRB5_SET_DEFAULT_IN_TKT_ETYPES)
157
158 /* Heimdal */
159 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
160 {
161 return krb5_set_default_in_tkt_etypes(ctx, enc);
162 }
163
164 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES */
165
166 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_KTYPES */
167
168 #if defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS)
169 /* HEIMDAL */
170 bool setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr)
171 {
172 memset(pkaddr, '\0', sizeof(krb5_address));
173 #if defined(HAVE_IPV6) && defined(KRB5_ADDRESS_INET6)
174 if (paddr->ss_family == AF_INET6) {
175 pkaddr->addr_type = KRB5_ADDRESS_INET6;
176 pkaddr->address.length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
177 pkaddr->address.data = (char *)&(((struct sockaddr_in6 *)paddr)->sin6_addr);
178 return true;
179 }
180 #endif
181 if (paddr->ss_family == AF_INET) {
182 pkaddr->addr_type = KRB5_ADDRESS_INET;
183 pkaddr->address.length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
184 pkaddr->address.data = (char *)&(((struct sockaddr_in *)paddr)->sin_addr);
185 return true;
186 }
187 return false;
188 }
189 #elif defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS)
190 /* MIT */
191 bool setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr)
192 {
193 memset(pkaddr, '\0', sizeof(krb5_address));
194 #if defined(HAVE_IPV6) && defined(ADDRTYPE_INET6)
195 if (paddr->ss_family == AF_INET6) {
196 pkaddr->addrtype = ADDRTYPE_INET6;
197 pkaddr->length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
198 pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in6 *)paddr)->sin6_addr);
199 return true;
200 }
201 #endif
202 if (paddr->ss_family == AF_INET) {
203 pkaddr->addrtype = ADDRTYPE_INET;
204 pkaddr->length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
205 pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in *)paddr)->sin_addr);
206 return true;
207 }
208 return false;
209 }
210 #else
211 #error UNKNOWN_ADDRTYPE
212 #endif
213
214 #if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_USE_ENCTYPE) && defined(HAVE_KRB5_STRING_TO_KEY) && defined(HAVE_KRB5_ENCRYPT_BLOCK)
215 static int create_kerberos_key_from_string_direct(krb5_context context,
216 krb5_principal host_princ,
217 krb5_data *password,
218 krb5_keyblock *key,
219 krb5_enctype enctype)
220 {
221 int ret = 0;
222 krb5_data salt;
223 krb5_encrypt_block eblock;
224
225 ret = krb5_principal2salt(context, host_princ, &salt);
226 if (ret) {
227 DEBUG(1,("krb5_principal2salt failed (%s)\n", error_message(ret)));
228 return ret;
229 }
230 krb5_use_enctype(context, &eblock, enctype);
231 ret = krb5_string_to_key(context, &eblock, key, password, &salt);
232 SAFE_FREE(salt.data);
233
234 return ret;
235 }
236 #elif defined(HAVE_KRB5_GET_PW_SALT) && defined(HAVE_KRB5_STRING_TO_KEY_SALT)
237 static int create_kerberos_key_from_string_direct(krb5_context context,
238 krb5_principal host_princ,
239 krb5_data *password,
240 krb5_keyblock *key,
241 krb5_enctype enctype)
242 {
243 int ret;
244 krb5_salt salt;
245
246 ret = krb5_get_pw_salt(context, host_princ, &salt);
247 if (ret) {
248 DEBUG(1,("krb5_get_pw_salt failed (%s)\n", error_message(ret)));
249 return ret;
250 }
251
252 ret = krb5_string_to_key_salt(context, enctype, (const char *)password->data, salt, key);
253 krb5_free_salt(context, salt);
254
255 return ret;
256 }
257 #else
258 #error UNKNOWN_CREATE_KEY_FUNCTIONS
259 #endif
260
261 int create_kerberos_key_from_string(krb5_context context,
262 krb5_principal host_princ,
263 krb5_data *password,
264 krb5_keyblock *key,
265 krb5_enctype enctype,
266 bool no_salt)
267 {
268 krb5_principal salt_princ = NULL;
269 int ret;
270 /*
271 * Check if we've determined that the KDC is salting keys for this
272 * principal/enctype in a non-obvious way. If it is, try to match
273 * its behavior.
274 */
275 if (no_salt) {
276 KRB5_KEY_DATA(key) = (KRB5_KEY_DATA_CAST *)SMB_MALLOC(password->length);
277 if (!KRB5_KEY_DATA(key)) {
278 return ENOMEM;
279 }
280 memcpy(KRB5_KEY_DATA(key), password->data, password->length);
281 KRB5_KEY_LENGTH(key) = password->length;
282 KRB5_KEY_TYPE(key) = enctype;
283 return 0;
284 }
285 salt_princ = kerberos_fetch_salt_princ_for_host_princ(context, host_princ, enctype);
286 ret = create_kerberos_key_from_string_direct(context, salt_princ ? salt_princ : host_princ, password, key, enctype);
287 if (salt_princ) {
288 krb5_free_principal(context, salt_princ);
289 }
290 return ret;
291 }
292
293 #if defined(HAVE_KRB5_GET_PERMITTED_ENCTYPES)
294 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
295 krb5_enctype **enctypes)
296 {
297 return krb5_get_permitted_enctypes(context, enctypes);
298 }
299 #elif defined(HAVE_KRB5_GET_DEFAULT_IN_TKT_ETYPES)
300 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
301 krb5_enctype **enctypes)
302 {
303 return krb5_get_default_in_tkt_etypes(context, enctypes);
304 }
305 #else
306 #error UNKNOWN_GET_ENCTYPES_FUNCTIONS
307 #endif
308
309 #if defined(HAVE_KRB5_AUTH_CON_SETKEY) && !defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY)
310 krb5_error_code krb5_auth_con_setuseruserkey(krb5_context context,
311 krb5_auth_context auth_context,
312 krb5_keyblock *keyblock)
313 {
314 return krb5_auth_con_setkey(context, auth_context, keyblock);
315 }
316 #endif
317
318 bool unwrap_edata_ntstatus(TALLOC_CTX *mem_ctx,
319 DATA_BLOB *edata,
320 DATA_BLOB *edata_out)
321 {
322 DATA_BLOB edata_contents;
323 ASN1_DATA data;
324 int edata_type;
325
326 if (!edata->length) {
327 return False;
328 }
329
330 asn1_load(&data, *edata);
331 asn1_start_tag(&data, ASN1_SEQUENCE(0));
332 asn1_start_tag(&data, ASN1_CONTEXT(1));
333 asn1_read_Integer(&data, &edata_type);
334
335 if (edata_type != KRB5_PADATA_PW_SALT) {
336 DEBUG(0,("edata is not of required type %d but of type %d\n",
337 KRB5_PADATA_PW_SALT, edata_type));
338 asn1_free(&data);
339 return False;
340 }
341
342 asn1_start_tag(&data, ASN1_CONTEXT(2));
343 asn1_read_OctetString(&data, &edata_contents);
344 asn1_end_tag(&data);
345 asn1_end_tag(&data);
346 asn1_end_tag(&data);
347 asn1_free(&data);
348
349 *edata_out = data_blob_talloc(mem_ctx, edata_contents.data, edata_contents.length);
350
351 data_blob_free(&edata_contents);
352
353 return True;
354 }
355
356
357 bool unwrap_pac(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, DATA_BLOB *unwrapped_pac_data)
358 {
359 DATA_BLOB pac_contents;
360 ASN1_DATA data;
361 int data_type;
362
363 if (!auth_data->length) {
364 return False;
365 }
366
367 asn1_load(&data, *auth_data);
368 asn1_start_tag(&data, ASN1_SEQUENCE(0));
369 asn1_start_tag(&data, ASN1_SEQUENCE(0));
370 asn1_start_tag(&data, ASN1_CONTEXT(0));
371 asn1_read_Integer(&data, &data_type);
372
373 if (data_type != KRB5_AUTHDATA_WIN2K_PAC ) {
374 DEBUG(10,("authorization data is not a Windows PAC (type: %d)\n", data_type));
375 asn1_free(&data);
376 return False;
377 }
378
379 asn1_end_tag(&data);
380 asn1_start_tag(&data, ASN1_CONTEXT(1));
381 asn1_read_OctetString(&data, &pac_contents);
382 asn1_end_tag(&data);
383 asn1_end_tag(&data);
384 asn1_end_tag(&data);
385 asn1_free(&data);
386
387 *unwrapped_pac_data = data_blob_talloc(mem_ctx, pac_contents.data, pac_contents.length);
388
389 data_blob_free(&pac_contents);
390
391 return True;
392 }
393
394 bool get_auth_data_from_tkt(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, krb5_ticket *tkt)
395 {
396 DATA_BLOB auth_data_wrapped;
397 bool got_auth_data_pac = False;
398 int i;
399
400 #if defined(HAVE_KRB5_TKT_ENC_PART2)
401 if (tkt->enc_part2 && tkt->enc_part2->authorization_data &&
402 tkt->enc_part2->authorization_data[0] &&
403 tkt->enc_part2->authorization_data[0]->length)
404 {
405 for (i = 0; tkt->enc_part2->authorization_data[i] != NULL; i++) {
406
407 if (tkt->enc_part2->authorization_data[i]->ad_type !=
408 KRB5_AUTHDATA_IF_RELEVANT) {
409 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
410 tkt->enc_part2->authorization_data[i]->ad_type));
411 continue;
412 }
413
414 auth_data_wrapped = data_blob(tkt->enc_part2->authorization_data[i]->contents,
415 tkt->enc_part2->authorization_data[i]->length);
416
417 /* check if it is a PAC */
418 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
419 data_blob_free(&auth_data_wrapped);
420
421 if (got_auth_data_pac) {
422 return true;
423 }
424 }
425
426 return got_auth_data_pac;
427 }
428
429 #else
430 if (tkt->ticket.authorization_data &&
431 tkt->ticket.authorization_data->len)
432 {
433 for (i = 0; i < tkt->ticket.authorization_data->len; i++) {
434
435 if (tkt->ticket.authorization_data->val[i].ad_type !=
436 KRB5_AUTHDATA_IF_RELEVANT) {
437 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
438 tkt->ticket.authorization_data->val[i].ad_type));
439 continue;
440 }
441
442 auth_data_wrapped = data_blob(tkt->ticket.authorization_data->val[i].ad_data.data,
443 tkt->ticket.authorization_data->val[i].ad_data.length);
444
445 /* check if it is a PAC */
446 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
447 data_blob_free(&auth_data_wrapped);
448
449 if (got_auth_data_pac) {
450 return true;
451 }
452 }
453
454 return got_auth_data_pac;
455 }
456 #endif
457 return False;
458 }
459
460 krb5_const_principal get_principal_from_tkt(krb5_ticket *tkt)
461 {
462 #if defined(HAVE_KRB5_TKT_ENC_PART2)
463 return tkt->enc_part2->client;
464 #else
465 return tkt->client;
466 #endif
467 }
468
469 #if !defined(HAVE_KRB5_LOCATE_KDC)
470
471 /* krb5_locate_kdc is an internal MIT symbol. MIT are not yet willing to commit
472 * to a public interface for this functionality, so we have to be able to live
473 * without it if the MIT libraries are hiding their internal symbols.
474 */
475
476 #if defined(KRB5_KRBHST_INIT)
477 /* Heimdal */
478 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm, struct sockaddr **addr_pp, int *naddrs, int get_masters)
479 {
480 krb5_krbhst_handle hnd;
481 krb5_krbhst_info *hinfo;
482 krb5_error_code rc;
483 int num_kdcs, i;
484 struct sockaddr *sa;
485 struct addrinfo *ai;
486
487 *addr_pp = NULL;
488 *naddrs = 0;
489
490 rc = krb5_krbhst_init(ctx, realm->data, KRB5_KRBHST_KDC, &hnd);
491 if (rc) {
492 DEBUG(0, ("smb_krb5_locate_kdc: krb5_krbhst_init failed (%s)\n", error_message(rc)));
493 return rc;
494 }
495
496 for ( num_kdcs = 0; (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); num_kdcs++)
497 ;
498
499 krb5_krbhst_reset(ctx, hnd);
500
501 if (!num_kdcs) {
502 DEBUG(0, ("smb_krb5_locate_kdc: zero kdcs found !\n"));
503 krb5_krbhst_free(ctx, hnd);
504 return -1;
505 }
506
507 sa = SMB_MALLOC_ARRAY( struct sockaddr, num_kdcs );
508 if (!sa) {
509 DEBUG(0, ("smb_krb5_locate_kdc: malloc failed\n"));
510 krb5_krbhst_free(ctx, hnd);
511 naddrs = 0;
512 return -1;
513 }
514
515 memset(sa, '\0', sizeof(struct sockaddr) * num_kdcs );
516
517 for (i = 0; i < num_kdcs && (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); i++) {
518
519 #if defined(HAVE_KRB5_KRBHST_GET_ADDRINFO)
520 rc = krb5_krbhst_get_addrinfo(ctx, hinfo, &ai);
521 if (rc) {
522 DEBUG(0,("krb5_krbhst_get_addrinfo failed: %s\n", error_message(rc)));
523 continue;
524 }
525 #endif
526 if (hinfo->ai && hinfo->ai->ai_family == AF_INET)
527 memcpy(&sa[i], hinfo->ai->ai_addr, sizeof(struct sockaddr));
528 }
529
530 krb5_krbhst_free(ctx, hnd);
531
532 *naddrs = num_kdcs;
533 *addr_pp = sa;
534 return 0;
535 }
536
537 #else /* ! defined(KRB5_KRBHST_INIT) */
538
539 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
540 struct sockaddr **addr_pp, int *naddrs, int get_masters)
541 {
542 DEBUG(0, ("unable to explicitly locate the KDC on this platform\n"));
543 return KRB5_KDC_UNREACH;
544 }
545
546 #endif /* KRB5_KRBHST_INIT */
547
548 #else /* ! HAVE_KRB5_LOCATE_KDC */
549
550 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
551 struct sockaddr **addr_pp, int *naddrs, int get_masters)
552 {
553 return krb5_locate_kdc(ctx, realm, addr_pp, naddrs, get_masters);
554 }
555
556 #endif /* HAVE_KRB5_LOCATE_KDC */
557
558 #if !defined(HAVE_KRB5_FREE_UNPARSED_NAME)
559 void krb5_free_unparsed_name(krb5_context context, char *val)
560 {
561 SAFE_FREE(val);
562 }
563 #endif
564
565 void kerberos_free_data_contents(krb5_context context, krb5_data *pdata)
566 {
567 #if defined(HAVE_KRB5_FREE_DATA_CONTENTS)
568 if (pdata->data) {
569 krb5_free_data_contents(context, pdata);
570 }
571 #else
572 SAFE_FREE(pdata->data);
573 #endif
574 }
575
576 void kerberos_set_creds_enctype(krb5_creds *pcreds, int enctype)
577 {
578 #if defined(HAVE_KRB5_KEYBLOCK_IN_CREDS)
579 KRB5_KEY_TYPE((&pcreds->keyblock)) = enctype;
580 #elif defined(HAVE_KRB5_SESSION_IN_CREDS)
581 KRB5_KEY_TYPE((&pcreds->session)) = enctype;
582 #else
583 #error UNKNOWN_KEYBLOCK_MEMBER_IN_KRB5_CREDS_STRUCT
584 #endif
585 }
586
587 bool kerberos_compatible_enctypes(krb5_context context,
588 krb5_enctype enctype1,
589 krb5_enctype enctype2)
590 {
591 #if defined(HAVE_KRB5_C_ENCTYPE_COMPARE)
592 krb5_boolean similar = 0;
593
594 krb5_c_enctype_compare(context, enctype1, enctype2, &similar);
595 return similar ? True : False;
596 #elif defined(HAVE_KRB5_ENCTYPES_COMPATIBLE_KEYS)
597 return krb5_enctypes_compatible_keys(context, enctype1, enctype2) ? True : False;
598 #endif
599 }
600
601 static bool ads_cleanup_expired_creds(krb5_context context,
602 krb5_ccache ccache,
603 krb5_creds *credsp)
604 {
605 krb5_error_code retval;
606 const char *cc_type = krb5_cc_get_type(context, ccache);
607
608 DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
609 cc_type, krb5_cc_get_name(context, ccache),
610 http_timestring(credsp->times.endtime)));
611
612 /* we will probably need new tickets if the current ones
613 will expire within 10 seconds.
614 */
615 if (credsp->times.endtime >= (time(NULL) + 10))
616 return False;
617
618 /* heimdal won't remove creds from a file ccache, and
619 perhaps we shouldn't anyway, since internally we
620 use memory ccaches, and a FILE one probably means that
621 we're using creds obtained outside of our exectuable
622 */
623 if (strequal(cc_type, "FILE")) {
624 DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a %s ccache\n", cc_type));
625 return False;
626 }
627
628 retval = krb5_cc_remove_cred(context, ccache, 0, credsp);
629 if (retval) {
630 DEBUG(1, ("ads_cleanup_expired_creds: krb5_cc_remove_cred failed, err %s\n",
631 error_message(retval)));
632 /* If we have an error in this, we want to display it,
633 but continue as though we deleted it */
634 }
635 return True;
636 }
637
638 /*
639 we can't use krb5_mk_req because w2k wants the service to be in a particular format
640 */
641 static krb5_error_code ads_krb5_mk_req(krb5_context context,
642 krb5_auth_context *auth_context,
643 const krb5_flags ap_req_options,
644 const char *principal,
645 krb5_ccache ccache,
646 krb5_data *outbuf,
647 time_t *expire_time)
648 {
649 krb5_error_code retval;
650 krb5_principal server;
651 krb5_creds * credsp;
652 krb5_creds creds;
653 krb5_data in_data;
654 bool creds_ready = False;
655 int i = 0, maxtries = 3;
656
657 retval = smb_krb5_parse_name(context, principal, &server);
658 if (retval) {
659 DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
660 return retval;
661 }
662
663 /* obtain ticket & session key */
664 ZERO_STRUCT(creds);
665 if ((retval = krb5_copy_principal(context, server, &creds.server))) {
666 DEBUG(1,("ads_krb5_mk_req: krb5_copy_principal failed (%s)\n",
667 error_message(retval)));
668 goto cleanup_princ;
669 }
670
671 if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
672 /* This can commonly fail on smbd startup with no ticket in the cache.
673 * Report at higher level than 1. */
674 DEBUG(3,("ads_krb5_mk_req: krb5_cc_get_principal failed (%s)\n",
675 error_message(retval)));
676 goto cleanup_creds;
677 }
678
679 while (!creds_ready && (i < maxtries)) {
680
681 if ((retval = krb5_get_credentials(context, 0, ccache,
682 &creds, &credsp))) {
683 DEBUG(1,("ads_krb5_mk_req: krb5_get_credentials failed for %s (%s)\n",
684 principal, error_message(retval)));
685 goto cleanup_creds;
686 }
687
688 /* cope with ticket being in the future due to clock skew */
689 if ((unsigned)credsp->times.starttime > time(NULL)) {
690 time_t t = time(NULL);
691 int time_offset =(int)((unsigned)credsp->times.starttime-t);
692 DEBUG(4,("ads_krb5_mk_req: Advancing clock by %d seconds to cope with clock skew\n", time_offset));
693 krb5_set_real_time(context, t + time_offset + 1, 0);
694 }
695
696 if (!ads_cleanup_expired_creds(context, ccache, credsp)) {
697 creds_ready = True;
698 }
699
700 i++;
701 }
702
703 DEBUG(10,("ads_krb5_mk_req: Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
704 principal, krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache),
705 http_timestring((unsigned)credsp->times.endtime),
706 (unsigned)credsp->times.endtime));
707
708 if (expire_time) {
709 *expire_time = (time_t)credsp->times.endtime;
710 }
711
712 in_data.length = 0;
713 retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
714 &in_data, credsp, outbuf);
715 if (retval) {
716 DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
717 error_message(retval)));
718 }
719
720 krb5_free_creds(context, credsp);
721
722 cleanup_creds:
723 krb5_free_cred_contents(context, &creds);
724
725 cleanup_princ:
726 krb5_free_principal(context, server);
727
728 return retval;
729 }
730
731 /*
732 get a kerberos5 ticket for the given service
733 */
734 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
735 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5,
736 uint32 extra_ap_opts, const char *ccname,
737 time_t *tgs_expire)
738
739 {
740 krb5_error_code retval;
741 krb5_data packet;
742 krb5_context context = NULL;
743 krb5_ccache ccdef = NULL;
744 krb5_auth_context auth_context = NULL;
745 krb5_enctype enc_types[] = {
746 #ifdef ENCTYPE_ARCFOUR_HMAC
747 ENCTYPE_ARCFOUR_HMAC,
748 #endif
749 ENCTYPE_DES_CBC_MD5,
750 ENCTYPE_DES_CBC_CRC,
751 ENCTYPE_NULL};
752
753 initialize_krb5_error_table();
754 retval = krb5_init_context(&context);
755 if (retval) {
756 DEBUG(1,("cli_krb5_get_ticket: krb5_init_context failed (%s)\n",
757 error_message(retval)));
758 goto failed;
759 }
760
761 if (time_offset != 0) {
762 krb5_set_real_time(context, time(NULL) + time_offset, 0);
763 }
764
765 if ((retval = krb5_cc_resolve(context, ccname ?
766 ccname : krb5_cc_default_name(context), &ccdef))) {
767 DEBUG(1,("cli_krb5_get_ticket: krb5_cc_default failed (%s)\n",
768 error_message(retval)));
769 goto failed;
770 }
771
772 if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
773 DEBUG(1,("cli_krb5_get_ticket: krb5_set_default_tgs_ktypes failed (%s)\n",
774 error_message(retval)));
775 goto failed;
776 }
777
778 if ((retval = ads_krb5_mk_req(context,
779 &auth_context,
780 AP_OPTS_USE_SUBKEY | (krb5_flags)extra_ap_opts,
781 principal,
782 ccdef, &packet,
783 tgs_expire))) {
784 goto failed;
785 }
786
787 get_krb5_smb_session_key(context, auth_context, session_key_krb5, False);
788
789 *ticket = data_blob(packet.data, packet.length);
790
791 kerberos_free_data_contents(context, &packet);
792
793 failed:
794
795 if ( context ) {
796 if (ccdef)
797 krb5_cc_close(context, ccdef);
798 if (auth_context)
799 krb5_auth_con_free(context, auth_context);
800 krb5_free_context(context);
801 }
802
803 return retval;
804 }
805
806 bool get_krb5_smb_session_key(krb5_context context, krb5_auth_context auth_context, DATA_BLOB *session_key, bool remote)
807 {
808 krb5_keyblock *skey;
809 krb5_error_code err;
810 bool ret = False;
811
812 if (remote)
813 err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
814 else
815 err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
816 if (err == 0 && skey != NULL) {
817 DEBUG(10, ("Got KRB5 session key of length %d\n", (int)KRB5_KEY_LENGTH(skey)));
818 *session_key = data_blob(KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
819 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
820
821 ret = True;
822
823 krb5_free_keyblock(context, skey);
824 } else {
825 DEBUG(10, ("KRB5 error getting session key %d\n", err));
826 }
827
828 return ret;
829 }
830
831
832 #if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
833 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i );
834
835 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i )
836 {
837 static krb5_data kdata;
838
839 kdata.data = (char *)krb5_principal_get_comp_string(context, principal, i);
840 kdata.length = strlen((const char *)kdata.data);
841 return &kdata;
842 }
843 #endif
844
845 krb5_error_code smb_krb5_kt_free_entry(krb5_context context, krb5_keytab_entry *kt_entry)
846 {
847 #if defined(HAVE_KRB5_KT_FREE_ENTRY)
848 return krb5_kt_free_entry(context, kt_entry);
849 #elif defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
850 return krb5_free_keytab_entry_contents(context, kt_entry);
851 #else
852 #error UNKNOWN_KT_FREE_FUNCTION
853 #endif
854 }
855
856 void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum,
857 struct PAC_SIGNATURE_DATA *sig)
858 {
859 #ifdef HAVE_CHECKSUM_IN_KRB5_CHECKSUM
860 cksum->cksumtype = (krb5_cksumtype)sig->type;
861 cksum->checksum.length = sig->signature.length;
862 cksum->checksum.data = sig->signature.data;
863 #else
864 cksum->checksum_type = (krb5_cksumtype)sig->type;
865 cksum->length = sig->signature.length;
866 cksum->contents = sig->signature.data;
867 #endif
868 }
869
870 krb5_error_code smb_krb5_verify_checksum(krb5_context context,
871 const krb5_keyblock *keyblock,
872 krb5_keyusage usage,
873 krb5_checksum *cksum,
874 uint8 *data,
875 size_t length)
876 {
877 krb5_error_code ret;
878
879 /* verify the checksum */
880
881 /* welcome to the wonderful world of samba's kerberos abstraction layer:
882 *
883 * function heimdal 0.6.1rc3 heimdal 0.7 MIT krb 1.4.2
884 * -----------------------------------------------------------------------------
885 * krb5_c_verify_checksum - works works
886 * krb5_verify_checksum works (6 args) works (6 args) broken (7 args)
887 */
888
889 #if defined(HAVE_KRB5_C_VERIFY_CHECKSUM)
890 {
891 krb5_boolean checksum_valid = False;
892 krb5_data input;
893
894 input.data = (char *)data;
895 input.length = length;
896
897 ret = krb5_c_verify_checksum(context,
898 keyblock,
899 usage,
900 &input,
901 cksum,
902 &checksum_valid);
903 if (ret) {
904 DEBUG(3,("smb_krb5_verify_checksum: krb5_c_verify_checksum() failed: %s\n",
905 error_message(ret)));
906 return ret;
907 }
908
909 if (!checksum_valid)
910 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
911 }
912
913 #elif KRB5_VERIFY_CHECKSUM_ARGS == 6 && defined(HAVE_KRB5_CRYPTO_INIT) && defined(HAVE_KRB5_CRYPTO) && defined(HAVE_KRB5_CRYPTO_DESTROY)
914
915 /* Warning: MIT's krb5_verify_checksum cannot be used as it will use a key
916 * without enctype and it ignores any key_usage types - Guenther */
917
918 {
919
920 krb5_crypto crypto;
921 ret = krb5_crypto_init(context,
922 keyblock,
923 0,
924 &crypto);
925 if (ret) {
926 DEBUG(0,("smb_krb5_verify_checksum: krb5_crypto_init() failed: %s\n",
927 error_message(ret)));
928 return ret;
929 }
930
931 ret = krb5_verify_checksum(context,
932 crypto,
933 usage,
934 data,
935 length,
936 cksum);
937
938 krb5_crypto_destroy(context, crypto);
939 }
940
941 #else
942 #error UNKNOWN_KRB5_VERIFY_CHECKSUM_FUNCTION
943 #endif
944
945 return ret;
946 }
947
948 time_t get_authtime_from_tkt(krb5_ticket *tkt)
949 {
950 #if defined(HAVE_KRB5_TKT_ENC_PART2)
951 return tkt->enc_part2->times.authtime;
952 #else
953 return tkt->ticket.authtime;
954 #endif
955 }
956
957 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
958 static int get_kvno_from_ap_req(krb5_ap_req *ap_req)
959 {
960 #ifdef HAVE_TICKET_POINTER_IN_KRB5_AP_REQ /* MIT */
961 if (ap_req->ticket->enc_part.kvno)
962 return ap_req->ticket->enc_part.kvno;
963 #else /* Heimdal */
964 if (ap_req->ticket.enc_part.kvno)
965 return *ap_req->ticket.enc_part.kvno;
966 #endif
967 return 0;
968 }
969
970 static krb5_enctype get_enctype_from_ap_req(krb5_ap_req *ap_req)
971 {
972 #ifdef HAVE_ETYPE_IN_ENCRYPTEDDATA /* Heimdal */
973 return ap_req->ticket.enc_part.etype;
974 #else /* MIT */
975 return ap_req->ticket->enc_part.enctype;
976 #endif
977 }
978 #endif /* HAVE_KRB5_DECODE_AP_REQ */
979
980 static krb5_error_code
981 get_key_from_keytab(krb5_context context,
982 krb5_const_principal server,
983 krb5_enctype enctype,
984 krb5_kvno kvno,
985 krb5_keyblock **out_key)
986 {
987 krb5_keytab_entry entry;
988 krb5_error_code ret;
989 krb5_keytab keytab;
990 char *name = NULL;
991
992 /* We have to open a new keytab handle here, as MIT does
993 an implicit open/getnext/close on krb5_kt_get_entry. We
994 may be in the middle of a keytab enumeration when this is
995 called. JRA. */
996
997 ret = smb_krb5_open_keytab(context, NULL, False, &keytab);
998 if (ret) {
999 DEBUG(1,("get_key_from_keytab: smb_krb5_open_keytab failed (%s)\n", error_message(ret)));
1000 return ret;
1001 }
1002
1003 if ( DEBUGLEVEL >= 10 ) {
1004 if (smb_krb5_unparse_name(context, server, &name) == 0) {
1005 DEBUG(10,("get_key_from_keytab: will look for kvno %d, enctype %d and name: %s\n",
1006 kvno, enctype, name));
1007 SAFE_FREE(name);
1008 }
1009 }
1010
1011 ret = krb5_kt_get_entry(context,
1012 keytab,
1013 server,
1014 kvno,
1015 enctype,
1016 &entry);
1017
1018 if (ret) {
1019 DEBUG(0,("get_key_from_keytab: failed to retrieve key: %s\n", error_message(ret)));
1020 goto out;
1021 }
1022
1023 #ifdef HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK /* Heimdal */
1024 ret = krb5_copy_keyblock(context, &entry.keyblock, out_key);
1025 #elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEY) /* MIT */
1026 ret = krb5_copy_keyblock(context, &entry.key, out_key);
1027 #else
1028 #error UNKNOWN_KRB5_KEYTAB_ENTRY_FORMAT
1029 #endif
1030
1031 if (ret) {
1032 DEBUG(0,("get_key_from_keytab: failed to copy key: %s\n", error_message(ret)));
1033 goto out;
1034 }
1035
1036 smb_krb5_kt_free_entry(context, &entry);
1037
1038 out:
1039 krb5_kt_close(context, keytab);
1040 return ret;
1041 }
1042
1043 /* Prototypes */
1044
1045 krb5_error_code smb_krb5_get_keyinfo_from_ap_req(krb5_context context,
1046 const krb5_data *inbuf,
1047 krb5_kvno *kvno,
1048 krb5_enctype *enctype)
1049 {
1050 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
1051 {
1052 krb5_error_code ret;
1053 krb5_ap_req ap_req;
1054
1055 ret = krb5_decode_ap_req(context, inbuf, &ap_req);
1056 if (ret)
1057 return ret;
1058
1059 *kvno = get_kvno_from_ap_req(&ap_req);
1060 *enctype = get_enctype_from_ap_req(&ap_req);
1061
1062 free_AP_REQ(&ap_req);
1063 return 0;
1064 }
1065 #endif
1066
1067 /* Possibly not an appropriate error code. */
1068 return KRB5KDC_ERR_BADOPTION;
1069 }
1070
1071 krb5_error_code krb5_rd_req_return_keyblock_from_keytab(krb5_context context,
1072 krb5_auth_context *auth_context,
1073 const krb5_data *inbuf,
1074 krb5_const_principal server,
1075 krb5_keytab keytab,
1076 krb5_flags *ap_req_options,
1077 krb5_ticket **ticket,
1078 krb5_keyblock **keyblock)
1079 {
1080 krb5_error_code ret;
1081 krb5_kvno kvno;
1082 krb5_enctype enctype;
1083 krb5_keyblock *local_keyblock;
1084
1085 ret = krb5_rd_req(context,
1086 auth_context,
1087 inbuf,
1088 server,
1089 keytab,
1090 ap_req_options,
1091 ticket);
1092 if (ret) {
1093 return ret;
1094 }
1095
1096 #ifdef KRB5_TICKET_HAS_KEYINFO
1097 enctype = (*ticket)->enc_part.enctype;
1098 kvno = (*ticket)->enc_part.kvno;
1099 #else
1100 ret = smb_krb5_get_keyinfo_from_ap_req(context, inbuf, &kvno, &enctype);
1101 if (ret) {
1102 return ret;
1103 }
1104 #endif
1105
1106 ret = get_key_from_keytab(context,
1107 server,
1108 enctype,
1109 kvno,
1110 &local_keyblock);
1111 if (ret) {
1112 DEBUG(0,("krb5_rd_req_return_keyblock_from_keytab: failed to call get_key_from_keytab\n"));
1113 goto out;
1114 }
1115
1116 out:
1117 if (ret && local_keyblock != NULL) {
1118 krb5_free_keyblock(context, local_keyblock);
1119 } else {
1120 *keyblock = local_keyblock;
1121 }
1122
1123 return ret;
1124 }
1125
1126 krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
1127 const char *name,
1128 krb5_principal *principal)
1129 {
1130 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
1131 return smb_krb5_parse_name_norealm_conv(context, name, principal);
1132 #endif
1133
1134 /* we are cheating here because parse_name will in fact set the realm.
1135 * We don't care as the only caller of smb_krb5_parse_name_norealm
1136 * ignores the realm anyway when calling
1137 * smb_krb5_principal_compare_any_realm later - Guenther */
1138
1139 return smb_krb5_parse_name(context, name, principal);
1140 }
1141
1142 bool smb_krb5_principal_compare_any_realm(krb5_context context,
1143 krb5_const_principal princ1,
1144 krb5_const_principal princ2)
1145 {
1146 #ifdef HAVE_KRB5_PRINCIPAL_COMPARE_ANY_REALM
1147
1148 return krb5_principal_compare_any_realm(context, princ1, princ2);
1149
1150 /* krb5_princ_size is a macro in MIT */
1151 #elif defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
1152
1153 int i, len1, len2;
1154 const krb5_data *p1, *p2;
1155
1156 len1 = krb5_princ_size(context, princ1);
1157 len2 = krb5_princ_size(context, princ2);
1158
1159 if (len1 != len2)
1160 return False;
1161
1162 for (i = 0; i < len1; i++) {
1163
1164 p1 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ1), i);
1165 p2 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ2), i);
1166
1167 if (p1->length != p2->length || memcmp(p1->data, p2->data, p1->length))
1168 return False;
1169 }
1170
1171 return True;
1172 #else
1173 #error NO_SUITABLE_PRINCIPAL_COMPARE_FUNCTION
1174 #endif
1175 }
1176
1177 krb5_error_code smb_krb5_renew_ticket(const char *ccache_string, /* FILE:/tmp/krb5cc_0 */
1178 const char *client_string, /* gd@BER.SUSE.DE */
1179 const char *service_string, /* krbtgt/BER.SUSE.DE@BER.SUSE.DE */
1180 time_t *expire_time)
1181 {
1182 krb5_error_code ret;
1183 krb5_context context = NULL;
1184 krb5_ccache ccache = NULL;
1185 krb5_principal client = NULL;
1186 krb5_creds creds, creds_in, *creds_out = NULL;
1187
1188 ZERO_STRUCT(creds);
1189 ZERO_STRUCT(creds_in);
1190
1191 initialize_krb5_error_table();
1192 ret = krb5_init_context(&context);
1193 if (ret) {
1194 goto done;
1195 }
1196
1197 if (!ccache_string) {
1198 ccache_string = krb5_cc_default_name(context);
1199 }
1200
1201 if (!ccache_string) {
1202 ret = EINVAL;
1203 goto done;
1204 }
1205
1206 DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_string));
1207
1208 /* FIXME: we should not fall back to defaults */
1209 ret = krb5_cc_resolve(context, CONST_DISCARD(char *, ccache_string), &ccache);
1210 if (ret) {
1211 goto done;
1212 }
1213
1214 if (client_string) {
1215 ret = smb_krb5_parse_name(context, client_string, &client);
1216 if (ret) {
1217 goto done;
1218 }
1219 } else {
1220 ret = krb5_cc_get_principal(context, ccache, &client);
1221 if (ret) {
1222 goto done;
1223 }
1224 }
1225
1226 #ifdef HAVE_KRB5_GET_RENEWED_CREDS /* MIT */
1227 {
1228 ret = krb5_get_renewed_creds(context, &creds, client, ccache, CONST_DISCARD(char *, service_string));
1229 if (ret) {
1230 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1231 goto done;
1232 }
1233 }
1234 #elif defined(HAVE_KRB5_GET_KDC_CRED) /* Heimdal */
1235 {
1236 krb5_kdc_flags flags;
1237 krb5_realm *client_realm = NULL;
1238
1239 ret = krb5_copy_principal(context, client, &creds_in.client);
1240 if (ret) {
1241 goto done;
1242 }
1243
1244 if (service_string) {
1245 ret = smb_krb5_parse_name(context, service_string, &creds_in.server);
1246 if (ret) {
1247 goto done;
1248 }
1249 } else {
1250 /* build tgt service by default */
1251 client_realm = krb5_princ_realm(context, creds_in.client);
1252 if (!client_realm) {
1253 ret = ENOMEM;
1254 goto done;
1255 }
1256 ret = krb5_make_principal(context, &creds_in.server, *client_realm, KRB5_TGS_NAME, *client_realm, NULL);
1257 if (ret) {
1258 goto done;
1259 }
1260 }
1261
1262 flags.i = 0;
1263 flags.b.renewable = flags.b.renew = True;
1264
1265 ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &creds_in, &creds_out);
1266 if (ret) {
1267 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1268 goto done;
1269 }
1270
1271 creds = *creds_out;
1272 }
1273 #else
1274 #error NO_SUITABLE_KRB5_TICKET_RENEW_FUNCTION_AVAILABLE
1275 #endif
1276
1277 /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1278 ret = krb5_cc_initialize(context, ccache, client);
1279 if (ret) {
1280 goto done;
1281 }
1282
1283 ret = krb5_cc_store_cred(context, ccache, &creds);
1284
1285 if (expire_time) {
1286 *expire_time = (time_t) creds.times.endtime;
1287 }
1288
1289 done:
1290 krb5_free_cred_contents(context, &creds_in);
1291
1292 if (creds_out) {
1293 krb5_free_creds(context, creds_out);
1294 } else {
1295 krb5_free_cred_contents(context, &creds);
1296 }
1297
1298 if (client) {
1299 krb5_free_principal(context, client);
1300 }
1301 if (ccache) {
1302 krb5_cc_close(context, ccache);
1303 }
1304 if (context) {
1305 krb5_free_context(context);
1306 }
1307
1308 return ret;
1309 }
1310
1311 krb5_error_code smb_krb5_free_addresses(krb5_context context, smb_krb5_addresses *addr)
1312 {
1313 krb5_error_code ret = 0;
1314 if (addr == NULL) {
1315 return ret;
1316 }
1317 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1318 krb5_free_addresses(context, addr->addrs);
1319 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1320 ret = krb5_free_addresses(context, addr->addrs);
1321 SAFE_FREE(addr->addrs);
1322 #endif
1323 SAFE_FREE(addr);
1324 addr = NULL;
1325 return ret;
1326 }
1327
1328 krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr)
1329 {
1330 krb5_error_code ret = 0;
1331 nstring buf;
1332 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1333 krb5_address **addrs = NULL;
1334 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1335 krb5_addresses *addrs = NULL;
1336 #endif
1337
1338 *kerb_addr = (smb_krb5_addresses *)SMB_MALLOC(sizeof(smb_krb5_addresses));
1339 if (*kerb_addr == NULL) {
1340 return ENOMEM;
1341 }
1342
1343 put_name(buf, global_myname(), ' ', 0x20);
1344
1345 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1346 {
1347 int num_addr = 2;
1348
1349 addrs = (krb5_address **)SMB_MALLOC(sizeof(krb5_address *) * num_addr);
1350 if (addrs == NULL) {
1351 SAFE_FREE(kerb_addr);
1352 return ENOMEM;
1353 }
1354
1355 memset(addrs, 0, sizeof(krb5_address *) * num_addr);
1356
1357 addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1358 if (addrs[0] == NULL) {
1359 SAFE_FREE(addrs);
1360 SAFE_FREE(kerb_addr);
1361 return ENOMEM;
1362 }
1363
1364 addrs[0]->magic = KV5M_ADDRESS;
1365 addrs[0]->addrtype = KRB5_ADDR_NETBIOS;
1366 addrs[0]->length = MAX_NETBIOSNAME_LEN;
1367 addrs[0]->contents = (unsigned char *)SMB_MALLOC(addrs[0]->length);
1368 if (addrs[0]->contents == NULL) {
1369 SAFE_FREE(addrs[0]);
1370 SAFE_FREE(addrs);
1371 SAFE_FREE(kerb_addr);
1372 return ENOMEM;
1373 }
1374
1375 memcpy(addrs[0]->contents, buf, addrs[0]->length);
1376
1377 addrs[1] = NULL;
1378 }
1379 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1380 {
1381 addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
1382 if (addrs == NULL) {
1383 SAFE_FREE(kerb_addr);
1384 return ENOMEM;
1385 }
1386
1387 memset(addrs, 0, sizeof(krb5_addresses));
1388
1389 addrs->len = 1;
1390 addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1391 if (addrs->val == NULL) {
1392 SAFE_FREE(addrs);
1393 SAFE_FREE(kerb_addr);
1394 return ENOMEM;
1395 }
1396
1397 addrs->val[0].addr_type = KRB5_ADDR_NETBIOS;
1398 addrs->val[0].address.length = MAX_NETBIOSNAME_LEN;
1399 addrs->val[0].address.data = (unsigned char *)SMB_MALLOC(addrs->val[0].address.length);
1400 if (addrs->val[0].address.data == NULL) {
1401 SAFE_FREE(addrs->val);
1402 SAFE_FREE(addrs);
1403 SAFE_FREE(kerb_addr);
1404 return ENOMEM;
1405 }
1406
1407 memcpy(addrs->val[0].address.data, buf, addrs->val[0].address.length);
1408 }
1409 #else
1410 #error UNKNOWN_KRB5_ADDRESS_FORMAT
1411 #endif
1412 (*kerb_addr)->addrs = addrs;
1413
1414 return ret;
1415 }
1416
1417 void smb_krb5_free_error(krb5_context context, krb5_error *krberror)
1418 {
1419 #ifdef HAVE_KRB5_FREE_ERROR_CONTENTS /* Heimdal */
1420 krb5_free_error_contents(context, krberror);
1421 #else /* MIT */
1422 krb5_free_error(context, krberror);
1423 #endif
1424 }
1425
1426 krb5_error_code handle_krberror_packet(krb5_context context,
1427 krb5_data *packet)
1428 {
1429 krb5_error_code ret;
1430 bool got_error_code = False;
1431
1432 DEBUG(10,("handle_krberror_packet: got error packet\n"));
1433
1434 #ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
1435 {
1436 krb5_error krberror;
1437
1438 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1439 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1440 error_message(ret)));
1441 return ret;
1442 }
1443
1444 if (krberror.e_data == NULL || krberror.e_data->data == NULL) {
1445 ret = (krb5_error_code) krberror.error_code;
1446 got_error_code = True;
1447 }
1448
1449 smb_krb5_free_error(context, &krberror);
1450 }
1451 #else /* MIT */
1452 {
1453 krb5_error *krberror;
1454
1455 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1456 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1457 error_message(ret)));
1458 return ret;
1459 }
1460
1461 if (krberror->e_data.data == NULL) {
1462 ret = ERROR_TABLE_BASE_krb5 + (krb5_error_code) krberror->error;
1463 got_error_code = True;
1464 }
1465 smb_krb5_free_error(context, krberror);
1466 }
1467 #endif
1468 if (got_error_code) {
1469 DEBUG(5,("handle_krberror_packet: got KERBERR from kpasswd: %s (%d)\n",
1470 error_message(ret), ret));
1471 }
1472 return ret;
1473 }
1474
1475 krb5_error_code smb_krb5_get_init_creds_opt_alloc(krb5_context context,
1476 krb5_get_init_creds_opt **opt)
1477 {
1478 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
1479 /* Heimdal or modern MIT version */
1480 return krb5_get_init_creds_opt_alloc(context, opt);
1481 #else
1482 /* Historical MIT version */
1483 krb5_get_init_creds_opt *my_opt;
1484
1485 *opt = NULL;
1486
1487 if ((my_opt = SMB_MALLOC_P(krb5_get_init_creds_opt)) == NULL) {
1488 return ENOMEM;
1489 }
1490
1491 krb5_get_init_creds_opt_init(my_opt);
1492
1493 *opt = my_opt;
1494 return 0;
1495 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC */
1496 }
1497
1498 void smb_krb5_get_init_creds_opt_free(krb5_context context,
1499 krb5_get_init_creds_opt *opt)
1500 {
1501 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_FREE
1502
1503 #ifdef KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT
1504 /* Modern MIT or Heimdal version */
1505 krb5_get_init_creds_opt_free(context, opt);
1506 #else
1507 /* Heimdal version */
1508 krb5_get_init_creds_opt_free(opt);
1509 #endif /* KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT */
1510
1511 #else /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1512 /* Historical MIT version */
1513 SAFE_FREE(opt);
1514 opt = NULL;
1515 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1516 }
1517
1518 krb5_enctype smb_get_enctype_from_kt_entry(const krb5_keytab_entry *kt_entry)
1519 {
1520 #ifdef HAVE_KRB5_KEYTAB_ENTRY_KEY /* MIT */
1521 return kt_entry->key.enctype;
1522 #elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK) /* Heimdal */
1523 return kt_entry->keyblock.keytype;
1524 #else
1525 #error UNKNOWN_KRB5_KEYTAB_ENTRY_KEYBLOCK_FORMAT
1526 #endif
1527 }
1528
1529
1530 /* caller needs to free etype_s */
1531 krb5_error_code smb_krb5_enctype_to_string(krb5_context context,
1532 krb5_enctype enctype,
1533 char **etype_s)
1534 {
1535 #ifdef HAVE_KRB5_ENCTYPE_TO_STRING_WITH_KRB5_CONTEXT_ARG
1536 return krb5_enctype_to_string(context, enctype, etype_s); /* Heimdal */
1537 #elif defined(HAVE_KRB5_ENCTYPE_TO_STRING_WITH_SIZE_T_ARG)
1538 char buf[256];
1539 krb5_error_code ret = krb5_enctype_to_string(enctype, buf, 256); /* MIT */
1540 if (ret) {
1541 return ret;
1542 }
1543 *etype_s = SMB_STRDUP(buf);
1544 if (!*etype_s) {
1545 return ENOMEM;
1546 }
1547 return ret;
1548 #else
1549 #error UNKNOWN_KRB5_ENCTYPE_TO_STRING_FUNCTION
1550 #endif
1551 }
1552
1553 krb5_error_code smb_krb5_mk_error(krb5_context context,
1554 krb5_error_code error_code,
1555 const krb5_principal server,
1556 krb5_data *reply)
1557 {
1558 #ifdef HAVE_SHORT_KRB5_MK_ERROR_INTERFACE /* MIT */
1559 /*
1560 * The MIT interface is *terrible*.
1561 * We have to construct this ourselves...
1562 */
1563 krb5_error e;
1564
1565 memset(&e, 0, sizeof(e));
1566 krb5_us_timeofday(context, &e.stime, &e.susec);
1567 e.server = server;
1568 #if defined(krb5_err_base)
1569 e.error = error_code - krb5_err_base;
1570 #elif defined(ERROR_TABLE_BASE_krb5)
1571 e.error = error_code - ERROR_TABLE_BASE_krb5;
1572 #else
1573 e.error = error_code; /* Almost certainly wrong, but what can we do... ? */
1574 #endif
1575
1576 return krb5_mk_error(context, &e, reply);
1577 #else /* Heimdal. */
1578 return krb5_mk_error(context,
1579 error_code,
1580 NULL,
1581 NULL, /* e_data */
1582 NULL,
1583 server,
1584 NULL,
1585 NULL,
1586 reply);
1587 #endif
1588 }
1589
1590 /**********************************************************************
1591 * Open a krb5 keytab with flags, handles readonly or readwrite access and
1592 * allows to process non-default keytab names.
1593 * @param context krb5_context
1594 * @param keytab_name_req string
1595 * @param write_access bool if writable keytab is required
1596 * @param krb5_keytab pointer to krb5_keytab (close with krb5_kt_close())
1597 * @return krb5_error_code
1598 **********************************************************************/
1599
1600 /* This MAX_NAME_LEN is a constant defined in krb5.h */
1601 #ifndef MAX_KEYTAB_NAME_LEN
1602 #define MAX_KEYTAB_NAME_LEN 1100
1603 #endif
1604
1605 krb5_error_code smb_krb5_open_keytab(krb5_context context,
1606 const char *keytab_name_req,
1607 bool write_access,
1608 krb5_keytab *keytab)
1609 {
1610 krb5_error_code ret = 0;
1611 TALLOC_CTX *mem_ctx;
1612 char keytab_string[MAX_KEYTAB_NAME_LEN];
1613 char *kt_str = NULL;
1614 bool found_valid_name = False;
1615 const char *pragma = "FILE";
1616 const char *tmp = NULL;
1617
1618 if (!write_access && !keytab_name_req) {
1619 /* caller just wants to read the default keytab readonly, so be it */
1620 return krb5_kt_default(context, keytab);
1621 }
1622
1623 mem_ctx = talloc_init("smb_krb5_open_keytab");
1624 if (!mem_ctx) {
1625 return ENOMEM;
1626 }
1627
1628 #ifdef HAVE_WRFILE_KEYTAB
1629 if (write_access) {
1630 pragma = "WRFILE";
1631 }
1632 #endif
1633
1634 if (keytab_name_req) {
1635
1636 if (strlen(keytab_name_req) > MAX_KEYTAB_NAME_LEN) {
1637 ret = KRB5_CONFIG_NOTENUFSPACE;
1638 goto out;
1639 }
1640
1641 if ((strncmp(keytab_name_req, "WRFILE:/", 8) == 0) ||
1642 (strncmp(keytab_name_req, "FILE:/", 6) == 0)) {
1643 tmp = keytab_name_req;
1644 goto resolve;
1645 }
1646
1647 if (keytab_name_req[0] != '/') {
1648 ret = KRB5_KT_BADNAME;
1649 goto out;
1650 }
1651
1652 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, keytab_name_req);
1653 if (!tmp) {
1654 ret = ENOMEM;
1655 goto out;
1656 }
1657
1658 goto resolve;
1659 }
1660
1661 /* we need to handle more complex keytab_strings, like:
1662 * "ANY:FILE:/etc/krb5.keytab,krb4:/etc/srvtab" */
1663
1664 ret = krb5_kt_default_name(context, &keytab_string[0], MAX_KEYTAB_NAME_LEN - 2);
1665 if (ret) {
1666 goto out;
1667 }
1668
1669 DEBUG(10,("smb_krb5_open_keytab: krb5_kt_default_name returned %s\n", keytab_string));
1670
1671 tmp = talloc_strdup(mem_ctx, keytab_string);
1672 if (!tmp) {
1673 ret = ENOMEM;
1674 goto out;
1675 }
1676
1677 if (strncmp(tmp, "ANY:", 4) == 0) {
1678 tmp += 4;
1679 }
1680
1681 memset(&keytab_string, '\0', sizeof(keytab_string));
1682
1683 while (next_token_talloc(mem_ctx, &tmp, &kt_str, ",")) {
1684 if (strncmp(kt_str, "WRFILE:", 7) == 0) {
1685 found_valid_name = True;
1686 tmp = kt_str;
1687 tmp += 7;
1688 }
1689
1690 if (strncmp(kt_str, "FILE:", 5) == 0) {
1691 found_valid_name = True;
1692 tmp = kt_str;
1693 tmp += 5;
1694 }
1695
1696 if (found_valid_name) {
1697 if (tmp[0] != '/') {
1698 ret = KRB5_KT_BADNAME;
1699 goto out;
1700 }
1701
1702 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, tmp);
1703 if (!tmp) {
1704 ret = ENOMEM;
1705 goto out;
1706 }
1707 break;
1708 }
1709 }
1710
1711 if (!found_valid_name) {
1712 ret = KRB5_KT_UNKNOWN_TYPE;
1713 goto out;
1714 }
1715
1716 resolve:
1717 DEBUG(10,("smb_krb5_open_keytab: resolving: %s\n", tmp));
1718 ret = krb5_kt_resolve(context, tmp, keytab);
1719
1720 out:
1721 TALLOC_FREE(mem_ctx);
1722 return ret;
1723 }
1724
1725 krb5_error_code smb_krb5_keytab_name(TALLOC_CTX *mem_ctx,
1726 krb5_context context,
1727 krb5_keytab keytab,
1728 const char **keytab_name)
1729 {
1730 char keytab_string[MAX_KEYTAB_NAME_LEN];
1731 krb5_error_code ret = 0;
1732
1733 ret = krb5_kt_get_name(context, keytab,
1734 keytab_string, MAX_KEYTAB_NAME_LEN - 2);
1735 if (ret) {
1736 return ret;
1737 }
1738
1739 *keytab_name = talloc_strdup(mem_ctx, keytab_string);
1740 if (!*keytab_name) {
1741 return ENOMEM;
1742 }
1743
1744 return ret;
1745 }
1746
1747 #else /* HAVE_KRB5 */
1748 /* this saves a few linking headaches */
1749 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
1750 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5, uint32 extra_ap_opts,
1751 const char *ccname, time_t *tgs_expire)
1752 {
1753 DEBUG(0,("NO KERBEROS SUPPORT\n"));
1754 return 1;
1755 }
1756
1757 #endif