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net: Fix several typos in comments.
[Samba.git] / source / libsmb / clikrb5.c
blob7688b0bd1216964a9eacbf81810765b96c6dcb2d
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 #else /* MIT */
35 #define KRB5_KEY_TYPE(k) ((k)->enctype)
36 #define KRB5_KEY_LENGTH(k) ((k)->length)
37 #define KRB5_KEY_DATA(k) ((k)->contents)
38 #endif /* HAVE_KRB5_KEYBLOCK_KEYVALUE */
39
40 /**************************************************************
41 Wrappers around kerberos string functions that convert from
42 utf8 -> unix charset and vica versa.
43 **************************************************************/
44
45 /**************************************************************
46 krb5_parse_name that takes a UNIX charset.
47 **************************************************************/
48
49 krb5_error_code smb_krb5_parse_name(krb5_context context,
50 const char *name, /* in unix charset */
51 krb5_principal *principal)
52 {
53 krb5_error_code ret;
54 char *utf8_name;
55 size_t converted_size;
56
57 if (!push_utf8_allocate(&utf8_name, name, &converted_size)) {
58 return ENOMEM;
59 }
60
61 ret = krb5_parse_name(context, utf8_name, principal);
62 SAFE_FREE(utf8_name);
63 return ret;
64 }
65
66 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
67 /**************************************************************
68 krb5_parse_name_norealm that takes a UNIX charset.
69 **************************************************************/
70
71 static krb5_error_code smb_krb5_parse_name_norealm_conv(krb5_context context,
72 const char *name, /* in unix charset */
73 krb5_principal *principal)
74 {
75 krb5_error_code ret;
76 char *utf8_name;
77 size_t converted_size;
78
79 *principal = NULL;
80 if (!push_utf8_allocate(&utf8_name, name, &converted_size)) {
81 return ENOMEM;
82 }
83
84 ret = krb5_parse_name_norealm(context, utf8_name, principal);
85 SAFE_FREE(utf8_name);
86 return ret;
87 }
88 #endif
89
90 /**************************************************************
91 krb5_parse_name that returns a UNIX charset name. Must
92 be freed with normal free() call.
93 **************************************************************/
94
95 krb5_error_code smb_krb5_unparse_name(krb5_context context,
96 krb5_const_principal principal,
97 char **unix_name)
98 {
99 krb5_error_code ret;
100 char *utf8_name;
101 size_t converted_size;
102
103 *unix_name = NULL;
104 ret = krb5_unparse_name(context, principal, &utf8_name);
105 if (ret) {
106 return ret;
107 }
108
109 if (!pull_utf8_allocate(unix_name, utf8_name, &converted_size)) {
110 krb5_free_unparsed_name(context, utf8_name);
111 return ENOMEM;
112 }
113 krb5_free_unparsed_name(context, utf8_name);
114 return 0;
115 }
116
117 #ifndef HAVE_KRB5_SET_REAL_TIME
118 /*
119 * This function is not in the Heimdal mainline.
120 */
121 krb5_error_code krb5_set_real_time(krb5_context context, int32_t seconds, int32_t microseconds)
122 {
123 krb5_error_code ret;
124 int32_t sec, usec;
125
126 ret = krb5_us_timeofday(context, &sec, &usec);
127 if (ret)
128 return ret;
129
130 context->kdc_sec_offset = seconds - sec;
131 context->kdc_usec_offset = microseconds - usec;
132
133 return 0;
134 }
135 #endif
136
137 #if !defined(HAVE_KRB5_SET_DEFAULT_TGS_KTYPES)
138
139 #if defined(HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES)
140
141 /* With MIT kerberos, we should use krb5_set_default_tgs_enctypes in preference
142 * to krb5_set_default_tgs_ktypes. See
143 * http://lists.samba.org/archive/samba-technical/2006-July/048271.html
144 *
145 * If the MIT libraries are not exporting internal symbols, we will end up in
146 * this branch, which is correct. Otherwise we will continue to use the
147 * internal symbol
148 */
149 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
150 {
151 return krb5_set_default_tgs_enctypes(ctx, enc);
152 }
153
154 #elif defined(HAVE_KRB5_SET_DEFAULT_IN_TKT_ETYPES)
155
156 /* Heimdal */
157 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
158 {
159 return krb5_set_default_in_tkt_etypes(ctx, enc);
160 }
161
162 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES */
163
164 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_KTYPES */
165
166 #if defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS)
167 /* HEIMDAL */
168 bool setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr)
169 {
170 memset(pkaddr, '\0', sizeof(krb5_address));
171 #if defined(HAVE_IPV6) && defined(KRB5_ADDRESS_INET6)
172 if (paddr->ss_family == AF_INET6) {
173 pkaddr->addr_type = KRB5_ADDRESS_INET6;
174 pkaddr->address.length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
175 pkaddr->address.data = (char *)&(((struct sockaddr_in6 *)paddr)->sin6_addr);
176 return true;
177 }
178 #endif
179 if (paddr->ss_family == AF_INET) {
180 pkaddr->addr_type = KRB5_ADDRESS_INET;
181 pkaddr->address.length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
182 pkaddr->address.data = (char *)&(((struct sockaddr_in *)paddr)->sin_addr);
183 return true;
184 }
185 return false;
186 }
187 #elif defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS)
188 /* MIT */
189 bool setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr)
190 {
191 memset(pkaddr, '\0', sizeof(krb5_address));
192 #if defined(HAVE_IPV6) && defined(ADDRTYPE_INET6)
193 if (paddr->ss_family == AF_INET6) {
194 pkaddr->addrtype = ADDRTYPE_INET6;
195 pkaddr->length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
196 pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in6 *)paddr)->sin6_addr);
197 return true;
198 }
199 #endif
200 if (paddr->ss_family == AF_INET) {
201 pkaddr->addrtype = ADDRTYPE_INET;
202 pkaddr->length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
203 pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in *)paddr)->sin_addr);
204 return true;
205 }
206 return false;
207 }
208 #else
209 #error UNKNOWN_ADDRTYPE
210 #endif
211
212 #if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_USE_ENCTYPE) && defined(HAVE_KRB5_STRING_TO_KEY) && defined(HAVE_KRB5_ENCRYPT_BLOCK)
213 int create_kerberos_key_from_string_direct(krb5_context context,
214 krb5_principal host_princ,
215 krb5_data *password,
216 krb5_keyblock *key,
217 krb5_enctype enctype)
218 {
219 int ret;
220 krb5_data salt;
221 krb5_encrypt_block eblock;
222
223 ret = krb5_principal2salt(context, host_princ, &salt);
224 if (ret) {
225 DEBUG(1,("krb5_principal2salt failed (%s)\n", error_message(ret)));
226 return ret;
227 }
228 krb5_use_enctype(context, &eblock, enctype);
229 ret = krb5_string_to_key(context, &eblock, key, password, &salt);
230 SAFE_FREE(salt.data);
231 return ret;
232 }
233 #elif defined(HAVE_KRB5_GET_PW_SALT) && defined(HAVE_KRB5_STRING_TO_KEY_SALT)
234 int create_kerberos_key_from_string_direct(krb5_context context,
235 krb5_principal host_princ,
236 krb5_data *password,
237 krb5_keyblock *key,
238 krb5_enctype enctype)
239 {
240 int ret;
241 krb5_salt salt;
242
243 ret = krb5_get_pw_salt(context, host_princ, &salt);
244 if (ret) {
245 DEBUG(1,("krb5_get_pw_salt failed (%s)\n", error_message(ret)));
246 return ret;
247 }
248
249 ret = krb5_string_to_key_salt(context, enctype, (const char *)password->data, salt, key);
250 krb5_free_salt(context, salt);
251 return ret;
252 }
253 #else
254 #error UNKNOWN_CREATE_KEY_FUNCTIONS
255 #endif
256
257 int create_kerberos_key_from_string(krb5_context context,
258 krb5_principal host_princ,
259 krb5_data *password,
260 krb5_keyblock *key,
261 krb5_enctype enctype)
262 {
263 krb5_principal salt_princ = NULL;
264 int ret;
265 /*
266 * Check if we've determined that the KDC is salting keys for this
267 * principal/enctype in a non-obvious way. If it is, try to match
268 * its behavior.
269 */
270 salt_princ = kerberos_fetch_salt_princ_for_host_princ(context, host_princ, enctype);
271 ret = create_kerberos_key_from_string_direct(context, salt_princ ? salt_princ : host_princ, password, key, enctype);
272 if (salt_princ) {
273 krb5_free_principal(context, salt_princ);
274 }
275 return ret;
276 }
277
278 #if defined(HAVE_KRB5_GET_PERMITTED_ENCTYPES)
279 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
280 krb5_enctype **enctypes)
281 {
282 return krb5_get_permitted_enctypes(context, enctypes);
283 }
284 #elif defined(HAVE_KRB5_GET_DEFAULT_IN_TKT_ETYPES)
285 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
286 krb5_enctype **enctypes)
287 {
288 return krb5_get_default_in_tkt_etypes(context, enctypes);
289 }
290 #else
291 #error UNKNOWN_GET_ENCTYPES_FUNCTIONS
292 #endif
293
294 #if defined(HAVE_KRB5_AUTH_CON_SETKEY) && !defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY)
295 krb5_error_code krb5_auth_con_setuseruserkey(krb5_context context,
296 krb5_auth_context auth_context,
297 krb5_keyblock *keyblock)
298 {
299 return krb5_auth_con_setkey(context, auth_context, keyblock);
300 }
301 #endif
302
303 bool unwrap_edata_ntstatus(TALLOC_CTX *mem_ctx,
304 DATA_BLOB *edata,
305 DATA_BLOB *edata_out)
306 {
307 DATA_BLOB edata_contents;
308 ASN1_DATA data;
309 int edata_type;
310
311 if (!edata->length) {
312 return False;
313 }
314
315 asn1_load(&data, *edata);
316 asn1_start_tag(&data, ASN1_SEQUENCE(0));
317 asn1_start_tag(&data, ASN1_CONTEXT(1));
318 asn1_read_Integer(&data, &edata_type);
319
320 if (edata_type != KRB5_PADATA_PW_SALT) {
321 DEBUG(0,("edata is not of required type %d but of type %d\n",
322 KRB5_PADATA_PW_SALT, edata_type));
323 asn1_free(&data);
324 return False;
325 }
326
327 asn1_start_tag(&data, ASN1_CONTEXT(2));
328 asn1_read_OctetString(&data, &edata_contents);
329 asn1_end_tag(&data);
330 asn1_end_tag(&data);
331 asn1_end_tag(&data);
332 asn1_free(&data);
333
334 *edata_out = data_blob_talloc(mem_ctx, edata_contents.data, edata_contents.length);
335
336 data_blob_free(&edata_contents);
337
338 return True;
339 }
340
341
342 bool unwrap_pac(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, DATA_BLOB *unwrapped_pac_data)
343 {
344 DATA_BLOB pac_contents;
345 ASN1_DATA data;
346 int data_type;
347
348 if (!auth_data->length) {
349 return False;
350 }
351
352 asn1_load(&data, *auth_data);
353 asn1_start_tag(&data, ASN1_SEQUENCE(0));
354 asn1_start_tag(&data, ASN1_SEQUENCE(0));
355 asn1_start_tag(&data, ASN1_CONTEXT(0));
356 asn1_read_Integer(&data, &data_type);
357
358 if (data_type != KRB5_AUTHDATA_WIN2K_PAC ) {
359 DEBUG(10,("authorization data is not a Windows PAC (type: %d)\n", data_type));
360 asn1_free(&data);
361 return False;
362 }
363
364 asn1_end_tag(&data);
365 asn1_start_tag(&data, ASN1_CONTEXT(1));
366 asn1_read_OctetString(&data, &pac_contents);
367 asn1_end_tag(&data);
368 asn1_end_tag(&data);
369 asn1_end_tag(&data);
370 asn1_free(&data);
371
372 *unwrapped_pac_data = data_blob_talloc(mem_ctx, pac_contents.data, pac_contents.length);
373
374 data_blob_free(&pac_contents);
375
376 return True;
377 }
378
379 bool get_auth_data_from_tkt(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, krb5_ticket *tkt)
380 {
381 DATA_BLOB auth_data_wrapped;
382 bool got_auth_data_pac = False;
383 int i;
384
385 #if defined(HAVE_KRB5_TKT_ENC_PART2)
386 if (tkt->enc_part2 && tkt->enc_part2->authorization_data &&
387 tkt->enc_part2->authorization_data[0] &&
388 tkt->enc_part2->authorization_data[0]->length)
389 {
390 for (i = 0; tkt->enc_part2->authorization_data[i] != NULL; i++) {
391
392 if (tkt->enc_part2->authorization_data[i]->ad_type !=
393 KRB5_AUTHDATA_IF_RELEVANT) {
394 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
395 tkt->enc_part2->authorization_data[i]->ad_type));
396 continue;
397 }
398
399 auth_data_wrapped = data_blob(tkt->enc_part2->authorization_data[i]->contents,
400 tkt->enc_part2->authorization_data[i]->length);
401
402 /* check if it is a PAC */
403 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
404 data_blob_free(&auth_data_wrapped);
405
406 if (got_auth_data_pac) {
407 return true;
408 }
409 }
410
411 return got_auth_data_pac;
412 }
413
414 #else
415 if (tkt->ticket.authorization_data &&
416 tkt->ticket.authorization_data->len)
417 {
418 for (i = 0; i < tkt->ticket.authorization_data->len; i++) {
419
420 if (tkt->ticket.authorization_data->val[i].ad_type !=
421 KRB5_AUTHDATA_IF_RELEVANT) {
422 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
423 tkt->ticket.authorization_data->val[i].ad_type));
424 continue;
425 }
426
427 auth_data_wrapped = data_blob(tkt->ticket.authorization_data->val[i].ad_data.data,
428 tkt->ticket.authorization_data->val[i].ad_data.length);
429
430 /* check if it is a PAC */
431 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
432 data_blob_free(&auth_data_wrapped);
433
434 if (got_auth_data_pac) {
435 return true;
436 }
437 }
438
439 return got_auth_data_pac;
440 }
441 #endif
442 return False;
443 }
444
445 krb5_const_principal get_principal_from_tkt(krb5_ticket *tkt)
446 {
447 #if defined(HAVE_KRB5_TKT_ENC_PART2)
448 return tkt->enc_part2->client;
449 #else
450 return tkt->client;
451 #endif
452 }
453
454 #if !defined(HAVE_KRB5_LOCATE_KDC)
455
456 /* krb5_locate_kdc is an internal MIT symbol. MIT are not yet willing to commit
457 * to a public interface for this functionality, so we have to be able to live
458 * without it if the MIT libraries are hiding their internal symbols.
459 */
460
461 #if defined(KRB5_KRBHST_INIT)
462 /* Heimdal */
463 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm, struct sockaddr **addr_pp, int *naddrs, int get_masters)
464 {
465 krb5_krbhst_handle hnd;
466 krb5_krbhst_info *hinfo;
467 krb5_error_code rc;
468 int num_kdcs, i;
469 struct sockaddr *sa;
470 struct addrinfo *ai;
471
472 *addr_pp = NULL;
473 *naddrs = 0;
474
475 rc = krb5_krbhst_init(ctx, realm->data, KRB5_KRBHST_KDC, &hnd);
476 if (rc) {
477 DEBUG(0, ("smb_krb5_locate_kdc: krb5_krbhst_init failed (%s)\n", error_message(rc)));
478 return rc;
479 }
480
481 for ( num_kdcs = 0; (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); num_kdcs++)
482 ;
483
484 krb5_krbhst_reset(ctx, hnd);
485
486 if (!num_kdcs) {
487 DEBUG(0, ("smb_krb5_locate_kdc: zero kdcs found !\n"));
488 krb5_krbhst_free(ctx, hnd);
489 return -1;
490 }
491
492 sa = SMB_MALLOC_ARRAY( struct sockaddr, num_kdcs );
493 if (!sa) {
494 DEBUG(0, ("smb_krb5_locate_kdc: malloc failed\n"));
495 krb5_krbhst_free(ctx, hnd);
496 naddrs = 0;
497 return -1;
498 }
499
500 memset(sa, '\0', sizeof(struct sockaddr) * num_kdcs );
501
502 for (i = 0; i < num_kdcs && (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); i++) {
503
504 #if defined(HAVE_KRB5_KRBHST_GET_ADDRINFO)
505 rc = krb5_krbhst_get_addrinfo(ctx, hinfo, &ai);
506 if (rc) {
507 DEBUG(0,("krb5_krbhst_get_addrinfo failed: %s\n", error_message(rc)));
508 continue;
509 }
510 #endif
511 if (hinfo->ai && hinfo->ai->ai_family == AF_INET)
512 memcpy(&sa[i], hinfo->ai->ai_addr, sizeof(struct sockaddr));
513 }
514
515 krb5_krbhst_free(ctx, hnd);
516
517 *naddrs = num_kdcs;
518 *addr_pp = sa;
519 return 0;
520 }
521
522 #else /* ! defined(KRB5_KRBHST_INIT) */
523
524 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
525 struct sockaddr **addr_pp, int *naddrs, int get_masters)
526 {
527 DEBUG(0, ("unable to explicitly locate the KDC on this platform\n"));
528 return KRB5_KDC_UNREACH;
529 }
530
531 #endif /* KRB5_KRBHST_INIT */
532
533 #else /* ! HAVE_KRB5_LOCATE_KDC */
534
535 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
536 struct sockaddr **addr_pp, int *naddrs, int get_masters)
537 {
538 return krb5_locate_kdc(ctx, realm, addr_pp, naddrs, get_masters);
539 }
540
541 #endif /* HAVE_KRB5_LOCATE_KDC */
542
543 #if !defined(HAVE_KRB5_FREE_UNPARSED_NAME)
544 void krb5_free_unparsed_name(krb5_context context, char *val)
545 {
546 SAFE_FREE(val);
547 }
548 #endif
549
550 void kerberos_free_data_contents(krb5_context context, krb5_data *pdata)
551 {
552 #if defined(HAVE_KRB5_FREE_DATA_CONTENTS)
553 if (pdata->data) {
554 krb5_free_data_contents(context, pdata);
555 }
556 #else
557 SAFE_FREE(pdata->data);
558 #endif
559 }
560
561 void kerberos_set_creds_enctype(krb5_creds *pcreds, int enctype)
562 {
563 #if defined(HAVE_KRB5_KEYBLOCK_IN_CREDS)
564 KRB5_KEY_TYPE((&pcreds->keyblock)) = enctype;
565 #elif defined(HAVE_KRB5_SESSION_IN_CREDS)
566 KRB5_KEY_TYPE((&pcreds->session)) = enctype;
567 #else
568 #error UNKNOWN_KEYBLOCK_MEMBER_IN_KRB5_CREDS_STRUCT
569 #endif
570 }
571
572 bool kerberos_compatible_enctypes(krb5_context context,
573 krb5_enctype enctype1,
574 krb5_enctype enctype2)
575 {
576 #if defined(HAVE_KRB5_C_ENCTYPE_COMPARE)
577 krb5_boolean similar = 0;
578
579 krb5_c_enctype_compare(context, enctype1, enctype2, &similar);
580 return similar ? True : False;
581 #elif defined(HAVE_KRB5_ENCTYPES_COMPATIBLE_KEYS)
582 return krb5_enctypes_compatible_keys(context, enctype1, enctype2) ? True : False;
583 #endif
584 }
585
586 static bool ads_cleanup_expired_creds(krb5_context context,
587 krb5_ccache ccache,
588 krb5_creds *credsp)
589 {
590 krb5_error_code retval;
591 const char *cc_type = krb5_cc_get_type(context, ccache);
592
593 DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
594 cc_type, krb5_cc_get_name(context, ccache),
595 http_timestring(credsp->times.endtime)));
596
597 /* we will probably need new tickets if the current ones
598 will expire within 10 seconds.
599 */
600 if (credsp->times.endtime >= (time(NULL) + 10))
601 return False;
602
603 /* heimdal won't remove creds from a file ccache, and
604 perhaps we shouldn't anyway, since internally we
605 use memory ccaches, and a FILE one probably means that
606 we're using creds obtained outside of our exectuable
607 */
608 if (strequal(cc_type, "FILE")) {
609 DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a %s ccache\n", cc_type));
610 return False;
611 }
612
613 retval = krb5_cc_remove_cred(context, ccache, 0, credsp);
614 if (retval) {
615 DEBUG(1, ("ads_cleanup_expired_creds: krb5_cc_remove_cred failed, err %s\n",
616 error_message(retval)));
617 /* If we have an error in this, we want to display it,
618 but continue as though we deleted it */
619 }
620 return True;
621 }
622
623 /*
624 we can't use krb5_mk_req because w2k wants the service to be in a particular format
625 */
626 static krb5_error_code ads_krb5_mk_req(krb5_context context,
627 krb5_auth_context *auth_context,
628 const krb5_flags ap_req_options,
629 const char *principal,
630 krb5_ccache ccache,
631 krb5_data *outbuf,
632 time_t *expire_time)
633 {
634 krb5_error_code retval;
635 krb5_principal server;
636 krb5_creds * credsp;
637 krb5_creds creds;
638 krb5_data in_data;
639 bool creds_ready = False;
640 int i = 0, maxtries = 3;
641
642 retval = smb_krb5_parse_name(context, principal, &server);
643 if (retval) {
644 DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
645 return retval;
646 }
647
648 /* obtain ticket & session key */
649 ZERO_STRUCT(creds);
650 if ((retval = krb5_copy_principal(context, server, &creds.server))) {
651 DEBUG(1,("ads_krb5_mk_req: krb5_copy_principal failed (%s)\n",
652 error_message(retval)));
653 goto cleanup_princ;
654 }
655
656 if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
657 /* This can commonly fail on smbd startup with no ticket in the cache.
658 * Report at higher level than 1. */
659 DEBUG(3,("ads_krb5_mk_req: krb5_cc_get_principal failed (%s)\n",
660 error_message(retval)));
661 goto cleanup_creds;
662 }
663
664 while (!creds_ready && (i < maxtries)) {
665
666 if ((retval = krb5_get_credentials(context, 0, ccache,
667 &creds, &credsp))) {
668 DEBUG(1,("ads_krb5_mk_req: krb5_get_credentials failed for %s (%s)\n",
669 principal, error_message(retval)));
670 goto cleanup_creds;
671 }
672
673 /* cope with ticket being in the future due to clock skew */
674 if ((unsigned)credsp->times.starttime > time(NULL)) {
675 time_t t = time(NULL);
676 int time_offset =(int)((unsigned)credsp->times.starttime-t);
677 DEBUG(4,("ads_krb5_mk_req: Advancing clock by %d seconds to cope with clock skew\n", time_offset));
678 krb5_set_real_time(context, t + time_offset + 1, 0);
679 }
680
681 if (!ads_cleanup_expired_creds(context, ccache, credsp)) {
682 creds_ready = True;
683 }
684
685 i++;
686 }
687
688 DEBUG(10,("ads_krb5_mk_req: Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
689 principal, krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache),
690 http_timestring((unsigned)credsp->times.endtime),
691 (unsigned)credsp->times.endtime));
692
693 if (expire_time) {
694 *expire_time = (time_t)credsp->times.endtime;
695 }
696
697 in_data.length = 0;
698 retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
699 &in_data, credsp, outbuf);
700 if (retval) {
701 DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
702 error_message(retval)));
703 }
704
705 krb5_free_creds(context, credsp);
706
707 cleanup_creds:
708 krb5_free_cred_contents(context, &creds);
709
710 cleanup_princ:
711 krb5_free_principal(context, server);
712
713 return retval;
714 }
715
716 /*
717 get a kerberos5 ticket for the given service
718 */
719 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
720 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5,
721 uint32 extra_ap_opts, const char *ccname,
722 time_t *tgs_expire)
723
724 {
725 krb5_error_code retval;
726 krb5_data packet;
727 krb5_context context = NULL;
728 krb5_ccache ccdef = NULL;
729 krb5_auth_context auth_context = NULL;
730 krb5_enctype enc_types[] = {
731 #ifdef ENCTYPE_ARCFOUR_HMAC
732 ENCTYPE_ARCFOUR_HMAC,
733 #endif
734 ENCTYPE_DES_CBC_MD5,
735 ENCTYPE_DES_CBC_CRC,
736 ENCTYPE_NULL};
737
738 initialize_krb5_error_table();
739 retval = krb5_init_context(&context);
740 if (retval) {
741 DEBUG(1,("cli_krb5_get_ticket: krb5_init_context failed (%s)\n",
742 error_message(retval)));
743 goto failed;
744 }
745
746 if (time_offset != 0) {
747 krb5_set_real_time(context, time(NULL) + time_offset, 0);
748 }
749
750 if ((retval = krb5_cc_resolve(context, ccname ?
751 ccname : krb5_cc_default_name(context), &ccdef))) {
752 DEBUG(1,("cli_krb5_get_ticket: krb5_cc_default failed (%s)\n",
753 error_message(retval)));
754 goto failed;
755 }
756
757 if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
758 DEBUG(1,("cli_krb5_get_ticket: krb5_set_default_tgs_ktypes failed (%s)\n",
759 error_message(retval)));
760 goto failed;
761 }
762
763 if ((retval = ads_krb5_mk_req(context,
764 &auth_context,
765 AP_OPTS_USE_SUBKEY | (krb5_flags)extra_ap_opts,
766 principal,
767 ccdef, &packet,
768 tgs_expire))) {
769 goto failed;
770 }
771
772 get_krb5_smb_session_key(context, auth_context, session_key_krb5, False);
773
774 *ticket = data_blob(packet.data, packet.length);
775
776 kerberos_free_data_contents(context, &packet);
777
778 failed:
779
780 if ( context ) {
781 if (ccdef)
782 krb5_cc_close(context, ccdef);
783 if (auth_context)
784 krb5_auth_con_free(context, auth_context);
785 krb5_free_context(context);
786 }
787
788 return retval;
789 }
790
791 bool get_krb5_smb_session_key(krb5_context context, krb5_auth_context auth_context, DATA_BLOB *session_key, bool remote)
792 {
793 krb5_keyblock *skey;
794 krb5_error_code err;
795 bool ret = False;
796
797 if (remote)
798 err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
799 else
800 err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
801 if (err == 0 && skey != NULL) {
802 DEBUG(10, ("Got KRB5 session key of length %d\n", (int)KRB5_KEY_LENGTH(skey)));
803 *session_key = data_blob(KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
804 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
805
806 ret = True;
807
808 krb5_free_keyblock(context, skey);
809 } else {
810 DEBUG(10, ("KRB5 error getting session key %d\n", err));
811 }
812
813 return ret;
814 }
815
816
817 #if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
818 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i );
819
820 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i )
821 {
822 static krb5_data kdata;
823
824 kdata.data = (char *)krb5_principal_get_comp_string(context, principal, i);
825 kdata.length = strlen((const char *)kdata.data);
826 return &kdata;
827 }
828 #endif
829
830 krb5_error_code smb_krb5_kt_free_entry(krb5_context context, krb5_keytab_entry *kt_entry)
831 {
832 #if defined(HAVE_KRB5_KT_FREE_ENTRY)
833 return krb5_kt_free_entry(context, kt_entry);
834 #elif defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
835 return krb5_free_keytab_entry_contents(context, kt_entry);
836 #else
837 #error UNKNOWN_KT_FREE_FUNCTION
838 #endif
839 }
840
841 void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum,
842 struct PAC_SIGNATURE_DATA *sig)
843 {
844 #ifdef HAVE_CHECKSUM_IN_KRB5_CHECKSUM
845 cksum->cksumtype = (krb5_cksumtype)sig->type;
846 cksum->checksum.length = sig->signature.length;
847 cksum->checksum.data = sig->signature.data;
848 #else
849 cksum->checksum_type = (krb5_cksumtype)sig->type;
850 cksum->length = sig->signature.length;
851 cksum->contents = sig->signature.data;
852 #endif
853 }
854
855 krb5_error_code smb_krb5_verify_checksum(krb5_context context,
856 const krb5_keyblock *keyblock,
857 krb5_keyusage usage,
858 krb5_checksum *cksum,
859 uint8 *data,
860 size_t length)
861 {
862 krb5_error_code ret;
863
864 /* verify the checksum */
865
866 /* welcome to the wonderful world of samba's kerberos abstraction layer:
867 *
868 * function heimdal 0.6.1rc3 heimdal 0.7 MIT krb 1.4.2
869 * -----------------------------------------------------------------------------
870 * krb5_c_verify_checksum - works works
871 * krb5_verify_checksum works (6 args) works (6 args) broken (7 args)
872 */
873
874 #if defined(HAVE_KRB5_C_VERIFY_CHECKSUM)
875 {
876 krb5_boolean checksum_valid = False;
877 krb5_data input;
878
879 input.data = (char *)data;
880 input.length = length;
881
882 ret = krb5_c_verify_checksum(context,
883 keyblock,
884 usage,
885 &input,
886 cksum,
887 &checksum_valid);
888 if (ret) {
889 DEBUG(3,("smb_krb5_verify_checksum: krb5_c_verify_checksum() failed: %s\n",
890 error_message(ret)));
891 return ret;
892 }
893
894 if (!checksum_valid)
895 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
896 }
897
898 #elif KRB5_VERIFY_CHECKSUM_ARGS == 6 && defined(HAVE_KRB5_CRYPTO_INIT) && defined(HAVE_KRB5_CRYPTO) && defined(HAVE_KRB5_CRYPTO_DESTROY)
899
900 /* Warning: MIT's krb5_verify_checksum cannot be used as it will use a key
901 * without enctype and it ignores any key_usage types - Guenther */
902
903 {
904
905 krb5_crypto crypto;
906 ret = krb5_crypto_init(context,
907 keyblock,
908 0,
909 &crypto);
910 if (ret) {
911 DEBUG(0,("smb_krb5_verify_checksum: krb5_crypto_init() failed: %s\n",
912 error_message(ret)));
913 return ret;
914 }
915
916 ret = krb5_verify_checksum(context,
917 crypto,
918 usage,
919 data,
920 length,
921 cksum);
922
923 krb5_crypto_destroy(context, crypto);
924 }
925
926 #else
927 #error UNKNOWN_KRB5_VERIFY_CHECKSUM_FUNCTION
928 #endif
929
930 return ret;
931 }
932
933 time_t get_authtime_from_tkt(krb5_ticket *tkt)
934 {
935 #if defined(HAVE_KRB5_TKT_ENC_PART2)
936 return tkt->enc_part2->times.authtime;
937 #else
938 return tkt->ticket.authtime;
939 #endif
940 }
941
942 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
943 static int get_kvno_from_ap_req(krb5_ap_req *ap_req)
944 {
945 #ifdef HAVE_TICKET_POINTER_IN_KRB5_AP_REQ /* MIT */
946 if (ap_req->ticket->enc_part.kvno)
947 return ap_req->ticket->enc_part.kvno;
948 #else /* Heimdal */
949 if (ap_req->ticket.enc_part.kvno)
950 return *ap_req->ticket.enc_part.kvno;
951 #endif
952 return 0;
953 }
954
955 static krb5_enctype get_enctype_from_ap_req(krb5_ap_req *ap_req)
956 {
957 #ifdef HAVE_ETYPE_IN_ENCRYPTEDDATA /* Heimdal */
958 return ap_req->ticket.enc_part.etype;
959 #else /* MIT */
960 return ap_req->ticket->enc_part.enctype;
961 #endif
962 }
963 #endif /* HAVE_KRB5_DECODE_AP_REQ */
964
965 static krb5_error_code
966 get_key_from_keytab(krb5_context context,
967 krb5_const_principal server,
968 krb5_enctype enctype,
969 krb5_kvno kvno,
970 krb5_keyblock **out_key)
971 {
972 krb5_keytab_entry entry;
973 krb5_error_code ret;
974 krb5_keytab keytab;
975 char *name = NULL;
976
977 /* We have to open a new keytab handle here, as MIT does
978 an implicit open/getnext/close on krb5_kt_get_entry. We
979 may be in the middle of a keytab enumeration when this is
980 called. JRA. */
981
982 ret = smb_krb5_open_keytab(context, NULL, False, &keytab);
983 if (ret) {
984 DEBUG(1,("get_key_from_keytab: smb_krb5_open_keytab failed (%s)\n", error_message(ret)));
985 return ret;
986 }
987
988 if ( DEBUGLEVEL >= 10 ) {
989 if (smb_krb5_unparse_name(context, server, &name) == 0) {
990 DEBUG(10,("get_key_from_keytab: will look for kvno %d, enctype %d and name: %s\n",
991 kvno, enctype, name));
992 SAFE_FREE(name);
993 }
994 }
995
996 ret = krb5_kt_get_entry(context,
997 keytab,
998 server,
999 kvno,
1000 enctype,
1001 &entry);
1002
1003 if (ret) {
1004 DEBUG(0,("get_key_from_keytab: failed to retrieve key: %s\n", error_message(ret)));
1005 goto out;
1006 }
1007
1008 #ifdef HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK /* Heimdal */
1009 ret = krb5_copy_keyblock(context, &entry.keyblock, out_key);
1010 #elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEY) /* MIT */
1011 ret = krb5_copy_keyblock(context, &entry.key, out_key);
1012 #else
1013 #error UNKNOWN_KRB5_KEYTAB_ENTRY_FORMAT
1014 #endif
1015
1016 if (ret) {
1017 DEBUG(0,("get_key_from_keytab: failed to copy key: %s\n", error_message(ret)));
1018 goto out;
1019 }
1020
1021 smb_krb5_kt_free_entry(context, &entry);
1022
1023 out:
1024 krb5_kt_close(context, keytab);
1025 return ret;
1026 }
1027
1028 /* Prototypes */
1029
1030 krb5_error_code smb_krb5_get_keyinfo_from_ap_req(krb5_context context,
1031 const krb5_data *inbuf,
1032 krb5_kvno *kvno,
1033 krb5_enctype *enctype)
1034 {
1035 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
1036 {
1037 krb5_error_code ret;
1038 krb5_ap_req ap_req;
1039
1040 ret = krb5_decode_ap_req(context, inbuf, &ap_req);
1041 if (ret)
1042 return ret;
1043
1044 *kvno = get_kvno_from_ap_req(&ap_req);
1045 *enctype = get_enctype_from_ap_req(&ap_req);
1046
1047 free_AP_REQ(&ap_req);
1048 return 0;
1049 }
1050 #endif
1051
1052 /* Possibly not an appropriate error code. */
1053 return KRB5KDC_ERR_BADOPTION;
1054 }
1055
1056 krb5_error_code krb5_rd_req_return_keyblock_from_keytab(krb5_context context,
1057 krb5_auth_context *auth_context,
1058 const krb5_data *inbuf,
1059 krb5_const_principal server,
1060 krb5_keytab keytab,
1061 krb5_flags *ap_req_options,
1062 krb5_ticket **ticket,
1063 krb5_keyblock **keyblock)
1064 {
1065 krb5_error_code ret;
1066 krb5_kvno kvno;
1067 krb5_enctype enctype;
1068 krb5_keyblock *local_keyblock;
1069
1070 ret = krb5_rd_req(context,
1071 auth_context,
1072 inbuf,
1073 server,
1074 keytab,
1075 ap_req_options,
1076 ticket);
1077 if (ret) {
1078 return ret;
1079 }
1080
1081 #ifdef KRB5_TICKET_HAS_KEYINFO
1082 enctype = (*ticket)->enc_part.enctype;
1083 kvno = (*ticket)->enc_part.kvno;
1084 #else
1085 ret = smb_krb5_get_keyinfo_from_ap_req(context, inbuf, &kvno, &enctype);
1086 if (ret) {
1087 return ret;
1088 }
1089 #endif
1090
1091 ret = get_key_from_keytab(context,
1092 server,
1093 enctype,
1094 kvno,
1095 &local_keyblock);
1096 if (ret) {
1097 DEBUG(0,("krb5_rd_req_return_keyblock_from_keytab: failed to call get_key_from_keytab\n"));
1098 goto out;
1099 }
1100
1101 out:
1102 if (ret && local_keyblock != NULL) {
1103 krb5_free_keyblock(context, local_keyblock);
1104 } else {
1105 *keyblock = local_keyblock;
1106 }
1107
1108 return ret;
1109 }
1110
1111 krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
1112 const char *name,
1113 krb5_principal *principal)
1114 {
1115 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
1116 return smb_krb5_parse_name_norealm_conv(context, name, principal);
1117 #endif
1118
1119 /* we are cheating here because parse_name will in fact set the realm.
1120 * We don't care as the only caller of smb_krb5_parse_name_norealm
1121 * ignores the realm anyway when calling
1122 * smb_krb5_principal_compare_any_realm later - Guenther */
1123
1124 return smb_krb5_parse_name(context, name, principal);
1125 }
1126
1127 bool smb_krb5_principal_compare_any_realm(krb5_context context,
1128 krb5_const_principal princ1,
1129 krb5_const_principal princ2)
1130 {
1131 #ifdef HAVE_KRB5_PRINCIPAL_COMPARE_ANY_REALM
1132
1133 return krb5_principal_compare_any_realm(context, princ1, princ2);
1134
1135 /* krb5_princ_size is a macro in MIT */
1136 #elif defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
1137
1138 int i, len1, len2;
1139 const krb5_data *p1, *p2;
1140
1141 len1 = krb5_princ_size(context, princ1);
1142 len2 = krb5_princ_size(context, princ2);
1143
1144 if (len1 != len2)
1145 return False;
1146
1147 for (i = 0; i < len1; i++) {
1148
1149 p1 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ1), i);
1150 p2 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ2), i);
1151
1152 if (p1->length != p2->length || memcmp(p1->data, p2->data, p1->length))
1153 return False;
1154 }
1155
1156 return True;
1157 #else
1158 #error NO_SUITABLE_PRINCIPAL_COMPARE_FUNCTION
1159 #endif
1160 }
1161
1162 krb5_error_code smb_krb5_renew_ticket(const char *ccache_string, /* FILE:/tmp/krb5cc_0 */
1163 const char *client_string, /* gd@BER.SUSE.DE */
1164 const char *service_string, /* krbtgt/BER.SUSE.DE@BER.SUSE.DE */
1165 time_t *expire_time)
1166 {
1167 krb5_error_code ret;
1168 krb5_context context = NULL;
1169 krb5_ccache ccache = NULL;
1170 krb5_principal client = NULL;
1171 krb5_creds creds, creds_in, *creds_out = NULL;
1172
1173 ZERO_STRUCT(creds);
1174 ZERO_STRUCT(creds_in);
1175
1176 initialize_krb5_error_table();
1177 ret = krb5_init_context(&context);
1178 if (ret) {
1179 goto done;
1180 }
1181
1182 if (!ccache_string) {
1183 ccache_string = krb5_cc_default_name(context);
1184 }
1185
1186 if (!ccache_string) {
1187 ret = EINVAL;
1188 goto done;
1189 }
1190
1191 DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_string));
1192
1193 /* FIXME: we should not fall back to defaults */
1194 ret = krb5_cc_resolve(context, CONST_DISCARD(char *, ccache_string), &ccache);
1195 if (ret) {
1196 goto done;
1197 }
1198
1199 if (client_string) {
1200 ret = smb_krb5_parse_name(context, client_string, &client);
1201 if (ret) {
1202 goto done;
1203 }
1204 } else {
1205 ret = krb5_cc_get_principal(context, ccache, &client);
1206 if (ret) {
1207 goto done;
1208 }
1209 }
1210
1211 #ifdef HAVE_KRB5_GET_RENEWED_CREDS /* MIT */
1212 {
1213 ret = krb5_get_renewed_creds(context, &creds, client, ccache, CONST_DISCARD(char *, service_string));
1214 if (ret) {
1215 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1216 goto done;
1217 }
1218 }
1219 #elif defined(HAVE_KRB5_GET_KDC_CRED) /* Heimdal */
1220 {
1221 krb5_kdc_flags flags;
1222 krb5_realm *client_realm = NULL;
1223
1224 ret = krb5_copy_principal(context, client, &creds_in.client);
1225 if (ret) {
1226 goto done;
1227 }
1228
1229 if (service_string) {
1230 ret = smb_krb5_parse_name(context, service_string, &creds_in.server);
1231 if (ret) {
1232 goto done;
1233 }
1234 } else {
1235 /* build tgt service by default */
1236 client_realm = krb5_princ_realm(context, creds_in.client);
1237 if (!client_realm) {
1238 ret = ENOMEM;
1239 goto done;
1240 }
1241 ret = krb5_make_principal(context, &creds_in.server, *client_realm, KRB5_TGS_NAME, *client_realm, NULL);
1242 if (ret) {
1243 goto done;
1244 }
1245 }
1246
1247 flags.i = 0;
1248 flags.b.renewable = flags.b.renew = True;
1249
1250 ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &creds_in, &creds_out);
1251 if (ret) {
1252 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1253 goto done;
1254 }
1255
1256 creds = *creds_out;
1257 }
1258 #else
1259 #error NO_SUITABLE_KRB5_TICKET_RENEW_FUNCTION_AVAILABLE
1260 #endif
1261
1262 /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1263 ret = krb5_cc_initialize(context, ccache, client);
1264 if (ret) {
1265 goto done;
1266 }
1267
1268 ret = krb5_cc_store_cred(context, ccache, &creds);
1269
1270 if (expire_time) {
1271 *expire_time = (time_t) creds.times.endtime;
1272 }
1273
1274 done:
1275 krb5_free_cred_contents(context, &creds_in);
1276
1277 if (creds_out) {
1278 krb5_free_creds(context, creds_out);
1279 } else {
1280 krb5_free_cred_contents(context, &creds);
1281 }
1282
1283 if (client) {
1284 krb5_free_principal(context, client);
1285 }
1286 if (ccache) {
1287 krb5_cc_close(context, ccache);
1288 }
1289 if (context) {
1290 krb5_free_context(context);
1291 }
1292
1293 return ret;
1294 }
1295
1296 krb5_error_code smb_krb5_free_addresses(krb5_context context, smb_krb5_addresses *addr)
1297 {
1298 krb5_error_code ret = 0;
1299 if (addr == NULL) {
1300 return ret;
1301 }
1302 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1303 krb5_free_addresses(context, addr->addrs);
1304 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1305 ret = krb5_free_addresses(context, addr->addrs);
1306 SAFE_FREE(addr->addrs);
1307 #endif
1308 SAFE_FREE(addr);
1309 addr = NULL;
1310 return ret;
1311 }
1312
1313 krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr)
1314 {
1315 krb5_error_code ret = 0;
1316 nstring buf;
1317 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1318 krb5_address **addrs = NULL;
1319 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1320 krb5_addresses *addrs = NULL;
1321 #endif
1322
1323 *kerb_addr = (smb_krb5_addresses *)SMB_MALLOC(sizeof(smb_krb5_addresses));
1324 if (*kerb_addr == NULL) {
1325 return ENOMEM;
1326 }
1327
1328 put_name(buf, global_myname(), ' ', 0x20);
1329
1330 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1331 {
1332 int num_addr = 2;
1333
1334 addrs = (krb5_address **)SMB_MALLOC(sizeof(krb5_address *) * num_addr);
1335 if (addrs == NULL) {
1336 SAFE_FREE(kerb_addr);
1337 return ENOMEM;
1338 }
1339
1340 memset(addrs, 0, sizeof(krb5_address *) * num_addr);
1341
1342 addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1343 if (addrs[0] == NULL) {
1344 SAFE_FREE(addrs);
1345 SAFE_FREE(kerb_addr);
1346 return ENOMEM;
1347 }
1348
1349 addrs[0]->magic = KV5M_ADDRESS;
1350 addrs[0]->addrtype = KRB5_ADDR_NETBIOS;
1351 addrs[0]->length = MAX_NETBIOSNAME_LEN;
1352 addrs[0]->contents = (unsigned char *)SMB_MALLOC(addrs[0]->length);
1353 if (addrs[0]->contents == NULL) {
1354 SAFE_FREE(addrs[0]);
1355 SAFE_FREE(addrs);
1356 SAFE_FREE(kerb_addr);
1357 return ENOMEM;
1358 }
1359
1360 memcpy(addrs[0]->contents, buf, addrs[0]->length);
1361
1362 addrs[1] = NULL;
1363 }
1364 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1365 {
1366 addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
1367 if (addrs == NULL) {
1368 SAFE_FREE(kerb_addr);
1369 return ENOMEM;
1370 }
1371
1372 memset(addrs, 0, sizeof(krb5_addresses));
1373
1374 addrs->len = 1;
1375 addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1376 if (addrs->val == NULL) {
1377 SAFE_FREE(addrs);
1378 SAFE_FREE(kerb_addr);
1379 return ENOMEM;
1380 }
1381
1382 addrs->val[0].addr_type = KRB5_ADDR_NETBIOS;
1383 addrs->val[0].address.length = MAX_NETBIOSNAME_LEN;
1384 addrs->val[0].address.data = (unsigned char *)SMB_MALLOC(addrs->val[0].address.length);
1385 if (addrs->val[0].address.data == NULL) {
1386 SAFE_FREE(addrs->val);
1387 SAFE_FREE(addrs);
1388 SAFE_FREE(kerb_addr);
1389 return ENOMEM;
1390 }
1391
1392 memcpy(addrs->val[0].address.data, buf, addrs->val[0].address.length);
1393 }
1394 #else
1395 #error UNKNOWN_KRB5_ADDRESS_FORMAT
1396 #endif
1397 (*kerb_addr)->addrs = addrs;
1398
1399 return ret;
1400 }
1401
1402 void smb_krb5_free_error(krb5_context context, krb5_error *krberror)
1403 {
1404 #ifdef HAVE_KRB5_FREE_ERROR_CONTENTS /* Heimdal */
1405 krb5_free_error_contents(context, krberror);
1406 #else /* MIT */
1407 krb5_free_error(context, krberror);
1408 #endif
1409 }
1410
1411 krb5_error_code handle_krberror_packet(krb5_context context,
1412 krb5_data *packet)
1413 {
1414 krb5_error_code ret;
1415 bool got_error_code = False;
1416
1417 DEBUG(10,("handle_krberror_packet: got error packet\n"));
1418
1419 #ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
1420 {
1421 krb5_error krberror;
1422
1423 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1424 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1425 error_message(ret)));
1426 return ret;
1427 }
1428
1429 if (krberror.e_data == NULL || krberror.e_data->data == NULL) {
1430 ret = (krb5_error_code) krberror.error_code;
1431 got_error_code = True;
1432 }
1433
1434 smb_krb5_free_error(context, &krberror);
1435 }
1436 #else /* MIT */
1437 {
1438 krb5_error *krberror;
1439
1440 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1441 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1442 error_message(ret)));
1443 return ret;
1444 }
1445
1446 if (krberror->e_data.data == NULL) {
1447 ret = ERROR_TABLE_BASE_krb5 + (krb5_error_code) krberror->error;
1448 got_error_code = True;
1449 }
1450 smb_krb5_free_error(context, krberror);
1451 }
1452 #endif
1453 if (got_error_code) {
1454 DEBUG(5,("handle_krberror_packet: got KERBERR from kpasswd: %s (%d)\n",
1455 error_message(ret), ret));
1456 }
1457 return ret;
1458 }
1459
1460 krb5_error_code smb_krb5_get_init_creds_opt_alloc(krb5_context context,
1461 krb5_get_init_creds_opt **opt)
1462 {
1463 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
1464 /* Heimdal or modern MIT version */
1465 return krb5_get_init_creds_opt_alloc(context, opt);
1466 #else
1467 /* Historical MIT version */
1468 krb5_get_init_creds_opt *my_opt;
1469
1470 *opt = NULL;
1471
1472 if ((my_opt = SMB_MALLOC_P(krb5_get_init_creds_opt)) == NULL) {
1473 return ENOMEM;
1474 }
1475
1476 krb5_get_init_creds_opt_init(my_opt);
1477
1478 *opt = my_opt;
1479 return 0;
1480 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC */
1481 }
1482
1483 void smb_krb5_get_init_creds_opt_free(krb5_context context,
1484 krb5_get_init_creds_opt *opt)
1485 {
1486 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_FREE
1487
1488 #ifdef KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT
1489 /* Modern MIT or Heimdal version */
1490 krb5_get_init_creds_opt_free(context, opt);
1491 #else
1492 /* Heimdal version */
1493 krb5_get_init_creds_opt_free(opt);
1494 #endif /* KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT */
1495
1496 #else /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1497 /* Historical MIT version */
1498 SAFE_FREE(opt);
1499 opt = NULL;
1500 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1501 }
1502
1503 krb5_enctype smb_get_enctype_from_kt_entry(const krb5_keytab_entry *kt_entry)
1504 {
1505 #ifdef HAVE_KRB5_KEYTAB_ENTRY_KEY /* MIT */
1506 return kt_entry->key.enctype;
1507 #elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK) /* Heimdal */
1508 return kt_entry->keyblock.keytype;
1509 #else
1510 #error UNKNOWN_KRB5_KEYTAB_ENTRY_KEYBLOCK_FORMAT
1511 #endif
1512 }
1513
1514
1515 /* caller needs to free etype_s */
1516 krb5_error_code smb_krb5_enctype_to_string(krb5_context context,
1517 krb5_enctype enctype,
1518 char **etype_s)
1519 {
1520 #ifdef HAVE_KRB5_ENCTYPE_TO_STRING_WITH_KRB5_CONTEXT_ARG
1521 return krb5_enctype_to_string(context, enctype, etype_s); /* Heimdal */
1522 #elif defined(HAVE_KRB5_ENCTYPE_TO_STRING_WITH_SIZE_T_ARG)
1523 char buf[256];
1524 krb5_error_code ret = krb5_enctype_to_string(enctype, buf, 256); /* MIT */
1525 if (ret) {
1526 return ret;
1527 }
1528 *etype_s = SMB_STRDUP(buf);
1529 if (!*etype_s) {
1530 return ENOMEM;
1531 }
1532 return ret;
1533 #else
1534 #error UNKNOWN_KRB5_ENCTYPE_TO_STRING_FUNCTION
1535 #endif
1536 }
1537
1538 krb5_error_code smb_krb5_mk_error(krb5_context context,
1539 krb5_error_code error_code,
1540 const krb5_principal server,
1541 krb5_data *reply)
1542 {
1543 #ifdef HAVE_SHORT_KRB5_MK_ERROR_INTERFACE /* MIT */
1544 /*
1545 * The MIT interface is *terrible*.
1546 * We have to construct this ourselves...
1547 */
1548 krb5_error e;
1549
1550 memset(&e, 0, sizeof(e));
1551 krb5_us_timeofday(context, &e.stime, &e.susec);
1552 e.server = server;
1553 #if defined(krb5_err_base)
1554 e.error = error_code - krb5_err_base;
1555 #elif defined(ERROR_TABLE_BASE_krb5)
1556 e.error = error_code - ERROR_TABLE_BASE_krb5;
1557 #else
1558 e.error = error_code; /* Almost certainly wrong, but what can we do... ? */
1559 #endif
1560
1561 return krb5_mk_error(context, &e, reply);
1562 #else /* Heimdal. */
1563 return krb5_mk_error(context,
1564 error_code,
1565 NULL,
1566 NULL, /* e_data */
1567 NULL,
1568 server,
1569 NULL,
1570 NULL,
1571 reply);
1572 #endif
1573 }
1574
1575 /**********************************************************************
1576 * Open a krb5 keytab with flags, handles readonly or readwrite access and
1577 * allows to process non-default keytab names.
1578 * @param context krb5_context
1579 * @param keytab_name_req string
1580 * @param write_access bool if writable keytab is required
1581 * @param krb5_keytab pointer to krb5_keytab (close with krb5_kt_close())
1582 * @return krb5_error_code
1583 **********************************************************************/
1584
1585 /* This MAX_NAME_LEN is a constant defined in krb5.h */
1586 #ifndef MAX_KEYTAB_NAME_LEN
1587 #define MAX_KEYTAB_NAME_LEN 1100
1588 #endif
1589
1590 krb5_error_code smb_krb5_open_keytab(krb5_context context,
1591 const char *keytab_name_req,
1592 bool write_access,
1593 krb5_keytab *keytab)
1594 {
1595 krb5_error_code ret = 0;
1596 TALLOC_CTX *mem_ctx;
1597 char keytab_string[MAX_KEYTAB_NAME_LEN];
1598 char *kt_str = NULL;
1599 bool found_valid_name = False;
1600 const char *pragma = "FILE";
1601 const char *tmp = NULL;
1602
1603 if (!write_access && !keytab_name_req) {
1604 /* caller just wants to read the default keytab readonly, so be it */
1605 return krb5_kt_default(context, keytab);
1606 }
1607
1608 mem_ctx = talloc_init("smb_krb5_open_keytab");
1609 if (!mem_ctx) {
1610 return ENOMEM;
1611 }
1612
1613 #ifdef HAVE_WRFILE_KEYTAB
1614 if (write_access) {
1615 pragma = "WRFILE";
1616 }
1617 #endif
1618
1619 if (keytab_name_req) {
1620
1621 if (strlen(keytab_name_req) > MAX_KEYTAB_NAME_LEN) {
1622 ret = KRB5_CONFIG_NOTENUFSPACE;
1623 goto out;
1624 }
1625
1626 if ((strncmp(keytab_name_req, "WRFILE:/", 8) == 0) ||
1627 (strncmp(keytab_name_req, "FILE:/", 6) == 0)) {
1628 tmp = keytab_name_req;
1629 goto resolve;
1630 }
1631
1632 if (keytab_name_req[0] != '/') {
1633 ret = KRB5_KT_BADNAME;
1634 goto out;
1635 }
1636
1637 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, keytab_name_req);
1638 if (!tmp) {
1639 ret = ENOMEM;
1640 goto out;
1641 }
1642
1643 goto resolve;
1644 }
1645
1646 /* we need to handle more complex keytab_strings, like:
1647 * "ANY:FILE:/etc/krb5.keytab,krb4:/etc/srvtab" */
1648
1649 ret = krb5_kt_default_name(context, &keytab_string[0], MAX_KEYTAB_NAME_LEN - 2);
1650 if (ret) {
1651 goto out;
1652 }
1653
1654 DEBUG(10,("smb_krb5_open_keytab: krb5_kt_default_name returned %s\n", keytab_string));
1655
1656 tmp = talloc_strdup(mem_ctx, keytab_string);
1657 if (!tmp) {
1658 ret = ENOMEM;
1659 goto out;
1660 }
1661
1662 if (strncmp(tmp, "ANY:", 4) == 0) {
1663 tmp += 4;
1664 }
1665
1666 memset(&keytab_string, '\0', sizeof(keytab_string));
1667
1668 while (next_token_talloc(mem_ctx, &tmp, &kt_str, ",")) {
1669 if (strncmp(kt_str, "WRFILE:", 7) == 0) {
1670 found_valid_name = True;
1671 tmp = kt_str;
1672 tmp += 7;
1673 }
1674
1675 if (strncmp(kt_str, "FILE:", 5) == 0) {
1676 found_valid_name = True;
1677 tmp = kt_str;
1678 tmp += 5;
1679 }
1680
1681 if (found_valid_name) {
1682 if (tmp[0] != '/') {
1683 ret = KRB5_KT_BADNAME;
1684 goto out;
1685 }
1686
1687 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, tmp);
1688 if (!tmp) {
1689 ret = ENOMEM;
1690 goto out;
1691 }
1692 break;
1693 }
1694 }
1695
1696 if (!found_valid_name) {
1697 ret = KRB5_KT_UNKNOWN_TYPE;
1698 goto out;
1699 }
1700
1701 resolve:
1702 DEBUG(10,("smb_krb5_open_keytab: resolving: %s\n", tmp));
1703 ret = krb5_kt_resolve(context, tmp, keytab);
1704
1705 out:
1706 TALLOC_FREE(mem_ctx);
1707 return ret;
1708 }
1709
1710 #else /* HAVE_KRB5 */
1711 /* this saves a few linking headaches */
1712 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
1713 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5, uint32 extra_ap_opts,
1714 const char *ccname, time_t *tgs_expire)
1715 {
1716 DEBUG(0,("NO KERBEROS SUPPORT\n"));
1717 return 1;
1718 }
1719
1720 #endif
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