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r23650: Fix remaining callers of krb5_kt_default().
[Samba/bb.git] / source / libsmb / clikrb5.c
blob82796d39ccd329eba3fca7a38c30cfb69e81525e
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 2 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, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24 #define KRB5_PRIVATE 1 /* this file uses PRIVATE interfaces! */
25 #define KRB5_DEPRECATED 1 /* this file uses DEPRECATED interfaces! */
26
27 #include "includes.h"
28
29 #ifdef HAVE_KRB5
30
31 #ifdef HAVE_KRB5_KEYBLOCK_KEYVALUE /* Heimdal */
32 #define KRB5_KEY_TYPE(k) ((k)->keytype)
33 #define KRB5_KEY_LENGTH(k) ((k)->keyvalue.length)
34 #define KRB5_KEY_DATA(k) ((k)->keyvalue.data)
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 #endif /* HAVE_KRB5_KEYBLOCK_KEYVALUE */
40
41 /**************************************************************
42 Wrappers around kerberos string functions that convert from
43 utf8 -> unix charset and vica versa.
44 **************************************************************/
45
46 /**************************************************************
47 krb5_parse_name that takes a UNIX charset.
48 **************************************************************/
49
50 krb5_error_code smb_krb5_parse_name(krb5_context context,
51 const char *name, /* in unix charset */
52 krb5_principal *principal)
53 {
54 krb5_error_code ret;
55 char *utf8_name;
56
57 if (push_utf8_allocate(&utf8_name, name) == (size_t)-1) {
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
78 *principal = NULL;
79 if (push_utf8_allocate(&utf8_name, name) == (size_t)-1) {
80 return ENOMEM;
81 }
82
83 ret = krb5_parse_name_norealm(context, utf8_name, principal);
84 SAFE_FREE(utf8_name);
85 return ret;
86 }
87 #endif
88
89 /**************************************************************
90 krb5_parse_name that returns a UNIX charset name. Must
91 be freed with normal free() call.
92 **************************************************************/
93
94 krb5_error_code smb_krb5_unparse_name(krb5_context context,
95 krb5_const_principal principal,
96 char **unix_name)
97 {
98 krb5_error_code ret;
99 char *utf8_name;
100
101 *unix_name = NULL;
102 ret = krb5_unparse_name(context, principal, &utf8_name);
103 if (ret) {
104 return ret;
105 }
106
107 if (pull_utf8_allocate(unix_name, utf8_name)==-1) {
108 krb5_free_unparsed_name(context, utf8_name);
109 return ENOMEM;
110 }
111 krb5_free_unparsed_name(context, utf8_name);
112 return 0;
113 }
114
115 #ifndef HAVE_KRB5_SET_REAL_TIME
116 /*
117 * This function is not in the Heimdal mainline.
118 */
119 krb5_error_code krb5_set_real_time(krb5_context context, int32_t seconds, int32_t microseconds)
120 {
121 krb5_error_code ret;
122 int32_t sec, usec;
123
124 ret = krb5_us_timeofday(context, &sec, &usec);
125 if (ret)
126 return ret;
127
128 context->kdc_sec_offset = seconds - sec;
129 context->kdc_usec_offset = microseconds - usec;
130
131 return 0;
132 }
133 #endif
134
135 #if !defined(HAVE_KRB5_SET_DEFAULT_TGS_KTYPES)
136
137 #if defined(HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES)
138
139 /* With MIT kerberos, we should use krb5_set_default_tgs_enctypes in preference
140 * to krb5_set_default_tgs_ktypes. See
141 * http://lists.samba.org/archive/samba-technical/2006-July/048271.html
142 *
143 * If the MIT libraries are not exporting internal symbols, we will end up in
144 * this branch, which is correct. Otherwise we will continue to use the
145 * internal symbol
146 */
147 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
148 {
149 return krb5_set_default_tgs_enctypes(ctx, enc);
150 }
151
152 #elif defined(HAVE_KRB5_SET_DEFAULT_IN_TKT_ETYPES)
153
154 /* Heimdal */
155 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
156 {
157 return krb5_set_default_in_tkt_etypes(ctx, enc);
158 }
159
160 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES */
161
162 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_KTYPES */
163
164 #if defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS)
165 /* HEIMDAL */
166 void setup_kaddr( krb5_address *pkaddr, struct sockaddr *paddr)
167 {
168 pkaddr->addr_type = KRB5_ADDRESS_INET;
169 pkaddr->address.length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
170 pkaddr->address.data = (char *)&(((struct sockaddr_in *)paddr)->sin_addr);
171 }
172 #elif defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS)
173 /* MIT */
174 void setup_kaddr( krb5_address *pkaddr, struct sockaddr *paddr)
175 {
176 pkaddr->addrtype = ADDRTYPE_INET;
177 pkaddr->length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
178 pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in *)paddr)->sin_addr);
179 }
180 #else
181 #error UNKNOWN_ADDRTYPE
182 #endif
183
184 #if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_USE_ENCTYPE) && defined(HAVE_KRB5_STRING_TO_KEY) && defined(HAVE_KRB5_ENCRYPT_BLOCK)
185 int create_kerberos_key_from_string_direct(krb5_context context,
186 krb5_principal host_princ,
187 krb5_data *password,
188 krb5_keyblock *key,
189 krb5_enctype enctype)
190 {
191 int ret;
192 krb5_data salt;
193 krb5_encrypt_block eblock;
194
195 ret = krb5_principal2salt(context, host_princ, &salt);
196 if (ret) {
197 DEBUG(1,("krb5_principal2salt failed (%s)\n", error_message(ret)));
198 return ret;
199 }
200 krb5_use_enctype(context, &eblock, enctype);
201 ret = krb5_string_to_key(context, &eblock, key, password, &salt);
202 SAFE_FREE(salt.data);
203 return ret;
204 }
205 #elif defined(HAVE_KRB5_GET_PW_SALT) && defined(HAVE_KRB5_STRING_TO_KEY_SALT)
206 int create_kerberos_key_from_string_direct(krb5_context context,
207 krb5_principal host_princ,
208 krb5_data *password,
209 krb5_keyblock *key,
210 krb5_enctype enctype)
211 {
212 int ret;
213 krb5_salt salt;
214
215 ret = krb5_get_pw_salt(context, host_princ, &salt);
216 if (ret) {
217 DEBUG(1,("krb5_get_pw_salt failed (%s)\n", error_message(ret)));
218 return ret;
219 }
220
221 ret = krb5_string_to_key_salt(context, enctype, (const char *)password->data, salt, key);
222 krb5_free_salt(context, salt);
223 return ret;
224 }
225 #else
226 #error UNKNOWN_CREATE_KEY_FUNCTIONS
227 #endif
228
229 int create_kerberos_key_from_string(krb5_context context,
230 krb5_principal host_princ,
231 krb5_data *password,
232 krb5_keyblock *key,
233 krb5_enctype enctype)
234 {
235 krb5_principal salt_princ = NULL;
236 int ret;
237 /*
238 * Check if we've determined that the KDC is salting keys for this
239 * principal/enctype in a non-obvious way. If it is, try to match
240 * its behavior.
241 */
242 salt_princ = kerberos_fetch_salt_princ_for_host_princ(context, host_princ, enctype);
243 ret = create_kerberos_key_from_string_direct(context, salt_princ ? salt_princ : host_princ, password, key, enctype);
244 if (salt_princ) {
245 krb5_free_principal(context, salt_princ);
246 }
247 return ret;
248 }
249
250 #if defined(HAVE_KRB5_GET_PERMITTED_ENCTYPES)
251 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
252 krb5_enctype **enctypes)
253 {
254 return krb5_get_permitted_enctypes(context, enctypes);
255 }
256 #elif defined(HAVE_KRB5_GET_DEFAULT_IN_TKT_ETYPES)
257 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
258 krb5_enctype **enctypes)
259 {
260 return krb5_get_default_in_tkt_etypes(context, enctypes);
261 }
262 #else
263 #error UNKNOWN_GET_ENCTYPES_FUNCTIONS
264 #endif
265
266 #if defined(HAVE_KRB5_AUTH_CON_SETKEY) && !defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY)
267 krb5_error_code krb5_auth_con_setuseruserkey(krb5_context context,
268 krb5_auth_context auth_context,
269 krb5_keyblock *keyblock)
270 {
271 return krb5_auth_con_setkey(context, auth_context, keyblock);
272 }
273 #endif
274
275 BOOL unwrap_edata_ntstatus(TALLOC_CTX *mem_ctx,
276 DATA_BLOB *edata,
277 DATA_BLOB *edata_out)
278 {
279 DATA_BLOB edata_contents;
280 ASN1_DATA data;
281 int edata_type;
282
283 if (!edata->length) {
284 return False;
285 }
286
287 asn1_load(&data, *edata);
288 asn1_start_tag(&data, ASN1_SEQUENCE(0));
289 asn1_start_tag(&data, ASN1_CONTEXT(1));
290 asn1_read_Integer(&data, &edata_type);
291
292 if (edata_type != KRB5_PADATA_PW_SALT) {
293 DEBUG(0,("edata is not of required type %d but of type %d\n",
294 KRB5_PADATA_PW_SALT, edata_type));
295 asn1_free(&data);
296 return False;
297 }
298
299 asn1_start_tag(&data, ASN1_CONTEXT(2));
300 asn1_read_OctetString(&data, &edata_contents);
301 asn1_end_tag(&data);
302 asn1_end_tag(&data);
303 asn1_end_tag(&data);
304 asn1_free(&data);
305
306 *edata_out = data_blob_talloc(mem_ctx, edata_contents.data, edata_contents.length);
307
308 data_blob_free(&edata_contents);
309
310 return True;
311 }
312
313
314 BOOL unwrap_pac(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, DATA_BLOB *unwrapped_pac_data)
315 {
316 DATA_BLOB pac_contents;
317 ASN1_DATA data;
318 int data_type;
319
320 if (!auth_data->length) {
321 return False;
322 }
323
324 asn1_load(&data, *auth_data);
325 asn1_start_tag(&data, ASN1_SEQUENCE(0));
326 asn1_start_tag(&data, ASN1_SEQUENCE(0));
327 asn1_start_tag(&data, ASN1_CONTEXT(0));
328 asn1_read_Integer(&data, &data_type);
329
330 if (data_type != KRB5_AUTHDATA_WIN2K_PAC ) {
331 DEBUG(10,("authorization data is not a Windows PAC (type: %d)\n", data_type));
332 asn1_free(&data);
333 return False;
334 }
335
336 asn1_end_tag(&data);
337 asn1_start_tag(&data, ASN1_CONTEXT(1));
338 asn1_read_OctetString(&data, &pac_contents);
339 asn1_end_tag(&data);
340 asn1_end_tag(&data);
341 asn1_end_tag(&data);
342 asn1_free(&data);
343
344 *unwrapped_pac_data = data_blob_talloc(mem_ctx, pac_contents.data, pac_contents.length);
345
346 data_blob_free(&pac_contents);
347
348 return True;
349 }
350
351 BOOL get_auth_data_from_tkt(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, krb5_ticket *tkt)
352 {
353 DATA_BLOB auth_data_wrapped;
354 BOOL got_auth_data_pac = False;
355 int i;
356
357 #if defined(HAVE_KRB5_TKT_ENC_PART2)
358 if (tkt->enc_part2 && tkt->enc_part2->authorization_data &&
359 tkt->enc_part2->authorization_data[0] &&
360 tkt->enc_part2->authorization_data[0]->length)
361 {
362 for (i = 0; tkt->enc_part2->authorization_data[i] != NULL; i++) {
363
364 if (tkt->enc_part2->authorization_data[i]->ad_type !=
365 KRB5_AUTHDATA_IF_RELEVANT) {
366 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
367 tkt->enc_part2->authorization_data[i]->ad_type));
368 continue;
369 }
370
371 auth_data_wrapped = data_blob(tkt->enc_part2->authorization_data[i]->contents,
372 tkt->enc_part2->authorization_data[i]->length);
373
374 /* check if it is a PAC */
375 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
376 data_blob_free(&auth_data_wrapped);
377
378 if (!got_auth_data_pac) {
379 continue;
380 }
381 }
382
383 return got_auth_data_pac;
384 }
385
386 #else
387 if (tkt->ticket.authorization_data &&
388 tkt->ticket.authorization_data->len)
389 {
390 for (i = 0; i < tkt->ticket.authorization_data->len; i++) {
391
392 if (tkt->ticket.authorization_data->val[i].ad_type !=
393 KRB5_AUTHDATA_IF_RELEVANT) {
394 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
395 tkt->ticket.authorization_data->val[i].ad_type));
396 continue;
397 }
398
399 auth_data_wrapped = data_blob(tkt->ticket.authorization_data->val[i].ad_data.data,
400 tkt->ticket.authorization_data->val[i].ad_data.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 continue;
408 }
409 }
410
411 return got_auth_data_pac;
412 }
413 #endif
414 return False;
415 }
416
417 krb5_const_principal get_principal_from_tkt(krb5_ticket *tkt)
418 {
419 #if defined(HAVE_KRB5_TKT_ENC_PART2)
420 return tkt->enc_part2->client;
421 #else
422 return tkt->client;
423 #endif
424 }
425
426 #if !defined(HAVE_KRB5_LOCATE_KDC)
427
428 /* krb5_locate_kdc is an internal MIT symbol. MIT are not yet willing to commit
429 * to a public interface for this functionality, so we have to be able to live
430 * without it if the MIT libraries are hiding their internal symbols.
431 */
432
433 #if defined(KRB5_KRBHST_INIT)
434 /* Heimdal */
435 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm, struct sockaddr **addr_pp, int *naddrs, int get_masters)
436 {
437 krb5_krbhst_handle hnd;
438 krb5_krbhst_info *hinfo;
439 krb5_error_code rc;
440 int num_kdcs, i;
441 struct sockaddr *sa;
442 struct addrinfo *ai;
443
444 *addr_pp = NULL;
445 *naddrs = 0;
446
447 rc = krb5_krbhst_init(ctx, realm->data, KRB5_KRBHST_KDC, &hnd);
448 if (rc) {
449 DEBUG(0, ("smb_krb5_locate_kdc: krb5_krbhst_init failed (%s)\n", error_message(rc)));
450 return rc;
451 }
452
453 for ( num_kdcs = 0; (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); num_kdcs++)
454 ;
455
456 krb5_krbhst_reset(ctx, hnd);
457
458 if (!num_kdcs) {
459 DEBUG(0, ("smb_krb5_locate_kdc: zero kdcs found !\n"));
460 krb5_krbhst_free(ctx, hnd);
461 return -1;
462 }
463
464 sa = SMB_MALLOC_ARRAY( struct sockaddr, num_kdcs );
465 if (!sa) {
466 DEBUG(0, ("smb_krb5_locate_kdc: malloc failed\n"));
467 krb5_krbhst_free(ctx, hnd);
468 naddrs = 0;
469 return -1;
470 }
471
472 memset(sa, '\0', sizeof(struct sockaddr) * num_kdcs );
473
474 for (i = 0; i < num_kdcs && (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); i++) {
475
476 #if defined(HAVE_KRB5_KRBHST_GET_ADDRINFO)
477 rc = krb5_krbhst_get_addrinfo(ctx, hinfo, &ai);
478 if (rc) {
479 DEBUG(0,("krb5_krbhst_get_addrinfo failed: %s\n", error_message(rc)));
480 continue;
481 }
482 #endif
483 if (hinfo->ai && hinfo->ai->ai_family == AF_INET)
484 memcpy(&sa[i], hinfo->ai->ai_addr, sizeof(struct sockaddr));
485 }
486
487 krb5_krbhst_free(ctx, hnd);
488
489 *naddrs = num_kdcs;
490 *addr_pp = sa;
491 return 0;
492 }
493
494 #else /* ! defined(KRB5_KRBHST_INIT) */
495
496 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
497 struct sockaddr **addr_pp, int *naddrs, int get_masters)
498 {
499 DEBUG(0, ("unable to explicitly locate the KDC on this platform\n"));
500 return KRB5_KDC_UNREACH;
501 }
502
503 #endif /* KRB5_KRBHST_INIT */
504
505 #else /* ! HAVE_KRB5_LOCATE_KDC */
506
507 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
508 struct sockaddr **addr_pp, int *naddrs, int get_masters)
509 {
510 return krb5_locate_kdc(ctx, realm, addr_pp, naddrs, get_masters);
511 }
512
513 #endif /* HAVE_KRB5_LOCATE_KDC */
514
515 #if !defined(HAVE_KRB5_FREE_UNPARSED_NAME)
516 void krb5_free_unparsed_name(krb5_context context, char *val)
517 {
518 SAFE_FREE(val);
519 }
520 #endif
521
522 void kerberos_free_data_contents(krb5_context context, krb5_data *pdata)
523 {
524 #if defined(HAVE_KRB5_FREE_DATA_CONTENTS)
525 if (pdata->data) {
526 krb5_free_data_contents(context, pdata);
527 }
528 #else
529 SAFE_FREE(pdata->data);
530 #endif
531 }
532
533 void kerberos_set_creds_enctype(krb5_creds *pcreds, int enctype)
534 {
535 #if defined(HAVE_KRB5_KEYBLOCK_IN_CREDS)
536 KRB5_KEY_TYPE((&pcreds->keyblock)) = enctype;
537 #elif defined(HAVE_KRB5_SESSION_IN_CREDS)
538 KRB5_KEY_TYPE((&pcreds->session)) = enctype;
539 #else
540 #error UNKNOWN_KEYBLOCK_MEMBER_IN_KRB5_CREDS_STRUCT
541 #endif
542 }
543
544 BOOL kerberos_compatible_enctypes(krb5_context context,
545 krb5_enctype enctype1,
546 krb5_enctype enctype2)
547 {
548 #if defined(HAVE_KRB5_C_ENCTYPE_COMPARE)
549 krb5_boolean similar = 0;
550
551 krb5_c_enctype_compare(context, enctype1, enctype2, &similar);
552 return similar ? True : False;
553 #elif defined(HAVE_KRB5_ENCTYPES_COMPATIBLE_KEYS)
554 return krb5_enctypes_compatible_keys(context, enctype1, enctype2) ? True : False;
555 #endif
556 }
557
558 static BOOL ads_cleanup_expired_creds(krb5_context context,
559 krb5_ccache ccache,
560 krb5_creds *credsp)
561 {
562 krb5_error_code retval;
563 const char *cc_type = krb5_cc_get_type(context, ccache);
564
565 DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
566 cc_type, krb5_cc_get_name(context, ccache),
567 http_timestring(credsp->times.endtime)));
568
569 /* we will probably need new tickets if the current ones
570 will expire within 10 seconds.
571 */
572 if (credsp->times.endtime >= (time(NULL) + 10))
573 return False;
574
575 /* heimdal won't remove creds from a file ccache, and
576 perhaps we shouldn't anyway, since internally we
577 use memory ccaches, and a FILE one probably means that
578 we're using creds obtained outside of our exectuable
579 */
580 if (strequal(cc_type, "FILE")) {
581 DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a %s ccache\n", cc_type));
582 return False;
583 }
584
585 retval = krb5_cc_remove_cred(context, ccache, 0, credsp);
586 if (retval) {
587 DEBUG(1, ("ads_cleanup_expired_creds: krb5_cc_remove_cred failed, err %s\n",
588 error_message(retval)));
589 /* If we have an error in this, we want to display it,
590 but continue as though we deleted it */
591 }
592 return True;
593 }
594
595 /*
596 we can't use krb5_mk_req because w2k wants the service to be in a particular format
597 */
598 static krb5_error_code ads_krb5_mk_req(krb5_context context,
599 krb5_auth_context *auth_context,
600 const krb5_flags ap_req_options,
601 const char *principal,
602 krb5_ccache ccache,
603 krb5_data *outbuf,
604 time_t *expire_time)
605 {
606 krb5_error_code retval;
607 krb5_principal server;
608 krb5_creds * credsp;
609 krb5_creds creds;
610 krb5_data in_data;
611 BOOL creds_ready = False;
612 int i = 0, maxtries = 3;
613
614 retval = smb_krb5_parse_name(context, principal, &server);
615 if (retval) {
616 DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
617 return retval;
618 }
619
620 /* obtain ticket & session key */
621 ZERO_STRUCT(creds);
622 if ((retval = krb5_copy_principal(context, server, &creds.server))) {
623 DEBUG(1,("ads_krb5_mk_req: krb5_copy_principal failed (%s)\n",
624 error_message(retval)));
625 goto cleanup_princ;
626 }
627
628 if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
629 /* This can commonly fail on smbd startup with no ticket in the cache.
630 * Report at higher level than 1. */
631 DEBUG(3,("ads_krb5_mk_req: krb5_cc_get_principal failed (%s)\n",
632 error_message(retval)));
633 goto cleanup_creds;
634 }
635
636 while (!creds_ready && (i < maxtries)) {
637
638 if ((retval = krb5_get_credentials(context, 0, ccache,
639 &creds, &credsp))) {
640 DEBUG(1,("ads_krb5_mk_req: krb5_get_credentials failed for %s (%s)\n",
641 principal, error_message(retval)));
642 goto cleanup_creds;
643 }
644
645 /* cope with ticket being in the future due to clock skew */
646 if ((unsigned)credsp->times.starttime > time(NULL)) {
647 time_t t = time(NULL);
648 int time_offset =(int)((unsigned)credsp->times.starttime-t);
649 DEBUG(4,("ads_krb5_mk_req: Advancing clock by %d seconds to cope with clock skew\n", time_offset));
650 krb5_set_real_time(context, t + time_offset + 1, 0);
651 }
652
653 if (!ads_cleanup_expired_creds(context, ccache, credsp)) {
654 creds_ready = True;
655 }
656
657 i++;
658 }
659
660 DEBUG(10,("ads_krb5_mk_req: Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
661 principal, krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache),
662 http_timestring((unsigned)credsp->times.endtime),
663 (unsigned)credsp->times.endtime));
664
665 if (expire_time) {
666 *expire_time = (time_t)credsp->times.endtime;
667 }
668
669 in_data.length = 0;
670 retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
671 &in_data, credsp, outbuf);
672 if (retval) {
673 DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
674 error_message(retval)));
675 }
676
677 krb5_free_creds(context, credsp);
678
679 cleanup_creds:
680 krb5_free_cred_contents(context, &creds);
681
682 cleanup_princ:
683 krb5_free_principal(context, server);
684
685 return retval;
686 }
687
688 /*
689 get a kerberos5 ticket for the given service
690 */
691 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
692 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5,
693 uint32 extra_ap_opts, const char *ccname,
694 time_t *tgs_expire)
695
696 {
697 krb5_error_code retval;
698 krb5_data packet;
699 krb5_context context = NULL;
700 krb5_ccache ccdef = NULL;
701 krb5_auth_context auth_context = NULL;
702 krb5_enctype enc_types[] = {
703 #ifdef ENCTYPE_ARCFOUR_HMAC
704 ENCTYPE_ARCFOUR_HMAC,
705 #endif
706 ENCTYPE_DES_CBC_MD5,
707 ENCTYPE_DES_CBC_CRC,
708 ENCTYPE_NULL};
709
710 initialize_krb5_error_table();
711 retval = krb5_init_context(&context);
712 if (retval) {
713 DEBUG(1,("cli_krb5_get_ticket: krb5_init_context failed (%s)\n",
714 error_message(retval)));
715 goto failed;
716 }
717
718 if (time_offset != 0) {
719 krb5_set_real_time(context, time(NULL) + time_offset, 0);
720 }
721
722 if ((retval = krb5_cc_resolve(context, ccname ?
723 ccname : krb5_cc_default_name(context), &ccdef))) {
724 DEBUG(1,("cli_krb5_get_ticket: krb5_cc_default failed (%s)\n",
725 error_message(retval)));
726 goto failed;
727 }
728
729 if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
730 DEBUG(1,("cli_krb5_get_ticket: krb5_set_default_tgs_ktypes failed (%s)\n",
731 error_message(retval)));
732 goto failed;
733 }
734
735 if ((retval = ads_krb5_mk_req(context,
736 &auth_context,
737 AP_OPTS_USE_SUBKEY | (krb5_flags)extra_ap_opts,
738 principal,
739 ccdef, &packet,
740 tgs_expire))) {
741 goto failed;
742 }
743
744 get_krb5_smb_session_key(context, auth_context, session_key_krb5, False);
745
746 *ticket = data_blob(packet.data, packet.length);
747
748 kerberos_free_data_contents(context, &packet);
749
750 failed:
751
752 if ( context ) {
753 if (ccdef)
754 krb5_cc_close(context, ccdef);
755 if (auth_context)
756 krb5_auth_con_free(context, auth_context);
757 krb5_free_context(context);
758 }
759
760 return retval;
761 }
762
763 BOOL get_krb5_smb_session_key(krb5_context context, krb5_auth_context auth_context, DATA_BLOB *session_key, BOOL remote)
764 {
765 krb5_keyblock *skey;
766 krb5_error_code err;
767 BOOL ret = False;
768
769 if (remote)
770 err = krb5_auth_con_getremotesubkey(context, auth_context, &skey);
771 else
772 err = krb5_auth_con_getlocalsubkey(context, auth_context, &skey);
773 if (err == 0 && skey != NULL) {
774 DEBUG(10, ("Got KRB5 session key of length %d\n", (int)KRB5_KEY_LENGTH(skey)));
775 *session_key = data_blob(KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
776 dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
777
778 ret = True;
779
780 krb5_free_keyblock(context, skey);
781 } else {
782 DEBUG(10, ("KRB5 error getting session key %d\n", err));
783 }
784
785 return ret;
786 }
787
788
789 #if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
790 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i );
791
792 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i )
793 {
794 static krb5_data kdata;
795
796 kdata.data = (char *)krb5_principal_get_comp_string(context, principal, i);
797 kdata.length = strlen((const char *)kdata.data);
798 return &kdata;
799 }
800 #endif
801
802 krb5_error_code smb_krb5_kt_free_entry(krb5_context context, krb5_keytab_entry *kt_entry)
803 {
804 #if defined(HAVE_KRB5_KT_FREE_ENTRY)
805 return krb5_kt_free_entry(context, kt_entry);
806 #elif defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
807 return krb5_free_keytab_entry_contents(context, kt_entry);
808 #else
809 #error UNKNOWN_KT_FREE_FUNCTION
810 #endif
811 }
812
813 void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum,
814 PAC_SIGNATURE_DATA *sig)
815 {
816 #ifdef HAVE_CHECKSUM_IN_KRB5_CHECKSUM
817 cksum->cksumtype = (krb5_cksumtype)sig->type;
818 cksum->checksum.length = sig->signature.buf_len;
819 cksum->checksum.data = sig->signature.buffer;
820 #else
821 cksum->checksum_type = (krb5_cksumtype)sig->type;
822 cksum->length = sig->signature.buf_len;
823 cksum->contents = sig->signature.buffer;
824 #endif
825 }
826
827 krb5_error_code smb_krb5_verify_checksum(krb5_context context,
828 krb5_keyblock *keyblock,
829 krb5_keyusage usage,
830 krb5_checksum *cksum,
831 uint8 *data,
832 size_t length)
833 {
834 krb5_error_code ret;
835
836 /* verify the checksum */
837
838 /* welcome to the wonderful world of samba's kerberos abstraction layer:
839 *
840 * function heimdal 0.6.1rc3 heimdal 0.7 MIT krb 1.4.2
841 * -----------------------------------------------------------------------------
842 * krb5_c_verify_checksum - works works
843 * krb5_verify_checksum works (6 args) works (6 args) broken (7 args)
844 */
845
846 #if defined(HAVE_KRB5_C_VERIFY_CHECKSUM)
847 {
848 krb5_boolean checksum_valid = False;
849 krb5_data input;
850
851 input.data = (char *)data;
852 input.length = length;
853
854 ret = krb5_c_verify_checksum(context,
855 keyblock,
856 usage,
857 &input,
858 cksum,
859 &checksum_valid);
860 if (ret) {
861 DEBUG(3,("smb_krb5_verify_checksum: krb5_c_verify_checksum() failed: %s\n",
862 error_message(ret)));
863 return ret;
864 }
865
866 if (!checksum_valid)
867 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
868 }
869
870 #elif KRB5_VERIFY_CHECKSUM_ARGS == 6 && defined(HAVE_KRB5_CRYPTO_INIT) && defined(HAVE_KRB5_CRYPTO) && defined(HAVE_KRB5_CRYPTO_DESTROY)
871
872 /* Warning: MIT's krb5_verify_checksum cannot be used as it will use a key
873 * without enctype and it ignores any key_usage types - Guenther */
874
875 {
876
877 krb5_crypto crypto;
878 ret = krb5_crypto_init(context,
879 keyblock,
880 0,
881 &crypto);
882 if (ret) {
883 DEBUG(0,("smb_krb5_verify_checksum: krb5_crypto_init() failed: %s\n",
884 error_message(ret)));
885 return ret;
886 }
887
888 ret = krb5_verify_checksum(context,
889 crypto,
890 usage,
891 data,
892 length,
893 cksum);
894
895 krb5_crypto_destroy(context, crypto);
896 }
897
898 #else
899 #error UNKNOWN_KRB5_VERIFY_CHECKSUM_FUNCTION
900 #endif
901
902 return ret;
903 }
904
905 time_t get_authtime_from_tkt(krb5_ticket *tkt)
906 {
907 #if defined(HAVE_KRB5_TKT_ENC_PART2)
908 return tkt->enc_part2->times.authtime;
909 #else
910 return tkt->ticket.authtime;
911 #endif
912 }
913
914 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
915 static int get_kvno_from_ap_req(krb5_ap_req *ap_req)
916 {
917 #ifdef HAVE_TICKET_POINTER_IN_KRB5_AP_REQ /* MIT */
918 if (ap_req->ticket->enc_part.kvno)
919 return ap_req->ticket->enc_part.kvno;
920 #else /* Heimdal */
921 if (ap_req->ticket.enc_part.kvno)
922 return *ap_req->ticket.enc_part.kvno;
923 #endif
924 return 0;
925 }
926
927 static krb5_enctype get_enctype_from_ap_req(krb5_ap_req *ap_req)
928 {
929 #ifdef HAVE_ETYPE_IN_ENCRYPTEDDATA /* Heimdal */
930 return ap_req->ticket.enc_part.etype;
931 #else /* MIT */
932 return ap_req->ticket->enc_part.enctype;
933 #endif
934 }
935 #endif /* HAVE_KRB5_DECODE_AP_REQ */
936
937 static krb5_error_code
938 get_key_from_keytab(krb5_context context,
939 krb5_const_principal server,
940 krb5_enctype enctype,
941 krb5_kvno kvno,
942 krb5_keyblock **out_key)
943 {
944 krb5_keytab_entry entry;
945 krb5_error_code ret;
946 krb5_keytab keytab;
947 char *name = NULL;
948
949 /* We have to open a new keytab handle here, as MIT does
950 an implicit open/getnext/close on krb5_kt_get_entry. We
951 may be in the middle of a keytab enumeration when this is
952 called. JRA. */
953
954 ret = smb_krb5_open_keytab(context, NULL, False, &keytab);
955 if (ret) {
956 DEBUG(1,("get_key_from_keytab: smb_krb5_open_keytab failed (%s)\n", error_message(ret)));
957 goto out;
958 }
959
960 if ( DEBUGLEVEL >= 10 ) {
961 if (smb_krb5_unparse_name(context, server, &name) == 0) {
962 DEBUG(10,("get_key_from_keytab: will look for kvno %d, enctype %d and name: %s\n",
963 kvno, enctype, name));
964 SAFE_FREE(name);
965 }
966 }
967
968 ret = krb5_kt_get_entry(context,
969 keytab,
970 server,
971 kvno,
972 enctype,
973 &entry);
974
975 if (ret) {
976 DEBUG(0,("get_key_from_keytab: failed to retrieve key: %s\n", error_message(ret)));
977 goto out;
978 }
979
980 #ifdef HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK /* Heimdal */
981 ret = krb5_copy_keyblock(context, &entry.keyblock, out_key);
982 #elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEY) /* MIT */
983 ret = krb5_copy_keyblock(context, &entry.key, out_key);
984 #else
985 #error UNKNOWN_KRB5_KEYTAB_ENTRY_FORMAT
986 #endif
987
988 if (ret) {
989 DEBUG(0,("get_key_from_keytab: failed to copy key: %s\n", error_message(ret)));
990 goto out;
991 }
992
993 smb_krb5_kt_free_entry(context, &entry);
994
995 out:
996 krb5_kt_close(context, keytab);
997 return ret;
998 }
999
1000 /* Prototypes */
1001
1002 krb5_error_code smb_krb5_get_keyinfo_from_ap_req(krb5_context context,
1003 const krb5_data *inbuf,
1004 krb5_kvno *kvno,
1005 krb5_enctype *enctype)
1006 {
1007 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
1008 {
1009 krb5_error_code ret;
1010 krb5_ap_req ap_req;
1011
1012 ret = krb5_decode_ap_req(context, inbuf, &ap_req);
1013 if (ret)
1014 return ret;
1015
1016 *kvno = get_kvno_from_ap_req(&ap_req);
1017 *enctype = get_enctype_from_ap_req(&ap_req);
1018
1019 free_AP_REQ(&ap_req);
1020 return 0;
1021 }
1022 #endif
1023
1024 /* Possibly not an appropriate error code. */
1025 return KRB5KDC_ERR_BADOPTION;
1026 }
1027
1028 krb5_error_code krb5_rd_req_return_keyblock_from_keytab(krb5_context context,
1029 krb5_auth_context *auth_context,
1030 const krb5_data *inbuf,
1031 krb5_const_principal server,
1032 krb5_keytab keytab,
1033 krb5_flags *ap_req_options,
1034 krb5_ticket **ticket,
1035 krb5_keyblock **keyblock)
1036 {
1037 krb5_error_code ret;
1038 krb5_kvno kvno;
1039 krb5_enctype enctype;
1040 krb5_keyblock *local_keyblock;
1041
1042 ret = krb5_rd_req(context,
1043 auth_context,
1044 inbuf,
1045 server,
1046 keytab,
1047 ap_req_options,
1048 ticket);
1049 if (ret) {
1050 return ret;
1051 }
1052
1053 #ifdef KRB5_TICKET_HAS_KEYINFO
1054 enctype = (*ticket)->enc_part.enctype;
1055 kvno = (*ticket)->enc_part.kvno;
1056 #else
1057 ret = smb_krb5_get_keyinfo_from_ap_req(context, inbuf, &kvno, &enctype);
1058 if (ret) {
1059 return ret;
1060 }
1061 #endif
1062
1063 ret = get_key_from_keytab(context,
1064 server,
1065 enctype,
1066 kvno,
1067 &local_keyblock);
1068 if (ret) {
1069 DEBUG(0,("krb5_rd_req_return_keyblock_from_keytab: failed to call get_key_from_keytab\n"));
1070 goto out;
1071 }
1072
1073 out:
1074 if (ret && local_keyblock != NULL) {
1075 krb5_free_keyblock(context, local_keyblock);
1076 } else {
1077 *keyblock = local_keyblock;
1078 }
1079
1080 return ret;
1081 }
1082
1083 krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
1084 const char *name,
1085 krb5_principal *principal)
1086 {
1087 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
1088 return smb_krb5_parse_name_norealm_conv(context, name, principal);
1089 #endif
1090
1091 /* we are cheating here because parse_name will in fact set the realm.
1092 * We don't care as the only caller of smb_krb5_parse_name_norealm
1093 * ignores the realm anyway when calling
1094 * smb_krb5_principal_compare_any_realm later - Guenther */
1095
1096 return smb_krb5_parse_name(context, name, principal);
1097 }
1098
1099 BOOL smb_krb5_principal_compare_any_realm(krb5_context context,
1100 krb5_const_principal princ1,
1101 krb5_const_principal princ2)
1102 {
1103 #ifdef HAVE_KRB5_PRINCIPAL_COMPARE_ANY_REALM
1104
1105 return krb5_principal_compare_any_realm(context, princ1, princ2);
1106
1107 /* krb5_princ_size is a macro in MIT */
1108 #elif defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
1109
1110 int i, len1, len2;
1111 const krb5_data *p1, *p2;
1112
1113 len1 = krb5_princ_size(context, princ1);
1114 len2 = krb5_princ_size(context, princ2);
1115
1116 if (len1 != len2)
1117 return False;
1118
1119 for (i = 0; i < len1; i++) {
1120
1121 p1 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ1), i);
1122 p2 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ2), i);
1123
1124 if (p1->length != p2->length || memcmp(p1->data, p2->data, p1->length))
1125 return False;
1126 }
1127
1128 return True;
1129 #else
1130 #error NO_SUITABLE_PRINCIPAL_COMPARE_FUNCTION
1131 #endif
1132 }
1133
1134 krb5_error_code smb_krb5_renew_ticket(const char *ccache_string, /* FILE:/tmp/krb5cc_0 */
1135 const char *client_string, /* gd@BER.SUSE.DE */
1136 const char *service_string, /* krbtgt/BER.SUSE.DE@BER.SUSE.DE */
1137 time_t *expire_time)
1138 {
1139 krb5_error_code ret;
1140 krb5_context context = NULL;
1141 krb5_ccache ccache = NULL;
1142 krb5_principal client = NULL;
1143 krb5_creds creds, creds_in, *creds_out = NULL;
1144
1145 ZERO_STRUCT(creds);
1146 ZERO_STRUCT(creds_in);
1147
1148 initialize_krb5_error_table();
1149 ret = krb5_init_context(&context);
1150 if (ret) {
1151 goto done;
1152 }
1153
1154 if (!ccache_string) {
1155 ccache_string = krb5_cc_default_name(context);
1156 }
1157
1158 if (!ccache_string) {
1159 ret = EINVAL;
1160 goto done;
1161 }
1162
1163 DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_string));
1164
1165 /* FIXME: we should not fall back to defaults */
1166 ret = krb5_cc_resolve(context, CONST_DISCARD(char *, ccache_string), &ccache);
1167 if (ret) {
1168 goto done;
1169 }
1170
1171 if (client_string) {
1172 ret = smb_krb5_parse_name(context, client_string, &client);
1173 if (ret) {
1174 goto done;
1175 }
1176 } else {
1177 ret = krb5_cc_get_principal(context, ccache, &client);
1178 if (ret) {
1179 goto done;
1180 }
1181 }
1182
1183 #ifdef HAVE_KRB5_GET_RENEWED_CREDS /* MIT */
1184 {
1185 ret = krb5_get_renewed_creds(context, &creds, client, ccache, CONST_DISCARD(char *, service_string));
1186 if (ret) {
1187 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1188 goto done;
1189 }
1190 }
1191 #elif defined(HAVE_KRB5_GET_KDC_CRED) /* Heimdal */
1192 {
1193 krb5_kdc_flags flags;
1194 krb5_realm *client_realm = NULL;
1195
1196 ret = krb5_copy_principal(context, client, &creds_in.client);
1197 if (ret) {
1198 goto done;
1199 }
1200
1201 if (service_string) {
1202 ret = smb_krb5_parse_name(context, service_string, &creds_in.server);
1203 if (ret) {
1204 goto done;
1205 }
1206 } else {
1207 /* build tgt service by default */
1208 client_realm = krb5_princ_realm(context, creds_in.client);
1209 if (!client_realm) {
1210 ret = ENOMEM;
1211 goto done;
1212 }
1213 ret = krb5_make_principal(context, &creds_in.server, *client_realm, KRB5_TGS_NAME, *client_realm, NULL);
1214 if (ret) {
1215 goto done;
1216 }
1217 }
1218
1219 flags.i = 0;
1220 flags.b.renewable = flags.b.renew = True;
1221
1222 ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &creds_in, &creds_out);
1223 if (ret) {
1224 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1225 goto done;
1226 }
1227
1228 creds = *creds_out;
1229 }
1230 #else
1231 #error NO_SUITABLE_KRB5_TICKET_RENEW_FUNCTION_AVAILABLE
1232 #endif
1233
1234 /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1235 ret = krb5_cc_initialize(context, ccache, client);
1236 if (ret) {
1237 goto done;
1238 }
1239
1240 ret = krb5_cc_store_cred(context, ccache, &creds);
1241
1242 if (expire_time) {
1243 *expire_time = (time_t) creds.times.endtime;
1244 }
1245
1246 done:
1247 krb5_free_cred_contents(context, &creds_in);
1248
1249 if (creds_out) {
1250 krb5_free_creds(context, creds_out);
1251 } else {
1252 krb5_free_cred_contents(context, &creds);
1253 }
1254
1255 if (client) {
1256 krb5_free_principal(context, client);
1257 }
1258 if (ccache) {
1259 krb5_cc_close(context, ccache);
1260 }
1261 if (context) {
1262 krb5_free_context(context);
1263 }
1264
1265 return ret;
1266 }
1267
1268 krb5_error_code smb_krb5_free_addresses(krb5_context context, smb_krb5_addresses *addr)
1269 {
1270 krb5_error_code ret = 0;
1271 if (addr == NULL) {
1272 return ret;
1273 }
1274 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1275 krb5_free_addresses(context, addr->addrs);
1276 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1277 ret = krb5_free_addresses(context, addr->addrs);
1278 SAFE_FREE(addr->addrs);
1279 #endif
1280 SAFE_FREE(addr);
1281 addr = NULL;
1282 return ret;
1283 }
1284
1285 krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr)
1286 {
1287 krb5_error_code ret = 0;
1288 nstring buf;
1289 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1290 krb5_address **addrs = NULL;
1291 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1292 krb5_addresses *addrs = NULL;
1293 #endif
1294
1295 *kerb_addr = (smb_krb5_addresses *)SMB_MALLOC(sizeof(smb_krb5_addresses));
1296 if (*kerb_addr == NULL) {
1297 return ENOMEM;
1298 }
1299
1300 put_name(buf, global_myname(), ' ', 0x20);
1301
1302 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1303 {
1304 int num_addr = 2;
1305
1306 addrs = (krb5_address **)SMB_MALLOC(sizeof(krb5_address *) * num_addr);
1307 if (addrs == NULL) {
1308 SAFE_FREE(kerb_addr);
1309 return ENOMEM;
1310 }
1311
1312 memset(addrs, 0, sizeof(krb5_address *) * num_addr);
1313
1314 addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1315 if (addrs[0] == NULL) {
1316 SAFE_FREE(addrs);
1317 SAFE_FREE(kerb_addr);
1318 return ENOMEM;
1319 }
1320
1321 addrs[0]->magic = KV5M_ADDRESS;
1322 addrs[0]->addrtype = KRB5_ADDR_NETBIOS;
1323 addrs[0]->length = MAX_NETBIOSNAME_LEN;
1324 addrs[0]->contents = (unsigned char *)SMB_MALLOC(addrs[0]->length);
1325 if (addrs[0]->contents == NULL) {
1326 SAFE_FREE(addrs[0]);
1327 SAFE_FREE(addrs);
1328 SAFE_FREE(kerb_addr);
1329 return ENOMEM;
1330 }
1331
1332 memcpy(addrs[0]->contents, buf, addrs[0]->length);
1333
1334 addrs[1] = NULL;
1335 }
1336 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1337 {
1338 addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
1339 if (addrs == NULL) {
1340 SAFE_FREE(kerb_addr);
1341 return ENOMEM;
1342 }
1343
1344 memset(addrs, 0, sizeof(krb5_addresses));
1345
1346 addrs->len = 1;
1347 addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1348 if (addrs->val == NULL) {
1349 SAFE_FREE(addrs);
1350 SAFE_FREE(kerb_addr);
1351 return ENOMEM;
1352 }
1353
1354 addrs->val[0].addr_type = KRB5_ADDR_NETBIOS;
1355 addrs->val[0].address.length = MAX_NETBIOSNAME_LEN;
1356 addrs->val[0].address.data = (unsigned char *)SMB_MALLOC(addrs->val[0].address.length);
1357 if (addrs->val[0].address.data == NULL) {
1358 SAFE_FREE(addrs->val);
1359 SAFE_FREE(addrs);
1360 SAFE_FREE(kerb_addr);
1361 return ENOMEM;
1362 }
1363
1364 memcpy(addrs->val[0].address.data, buf, addrs->val[0].address.length);
1365 }
1366 #else
1367 #error UNKNOWN_KRB5_ADDRESS_FORMAT
1368 #endif
1369 (*kerb_addr)->addrs = addrs;
1370
1371 return ret;
1372 }
1373
1374 void smb_krb5_free_error(krb5_context context, krb5_error *krberror)
1375 {
1376 #ifdef HAVE_KRB5_FREE_ERROR_CONTENTS /* Heimdal */
1377 krb5_free_error_contents(context, krberror);
1378 #else /* MIT */
1379 krb5_free_error(context, krberror);
1380 #endif
1381 }
1382
1383 krb5_error_code handle_krberror_packet(krb5_context context,
1384 krb5_data *packet)
1385 {
1386 krb5_error_code ret;
1387 BOOL got_error_code = False;
1388
1389 DEBUG(10,("handle_krberror_packet: got error packet\n"));
1390
1391 #ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
1392 {
1393 krb5_error krberror;
1394
1395 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1396 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1397 error_message(ret)));
1398 return ret;
1399 }
1400
1401 if (krberror.e_data == NULL || krberror.e_data->data == NULL) {
1402 ret = (krb5_error_code) krberror.error_code;
1403 got_error_code = True;
1404 }
1405
1406 smb_krb5_free_error(context, &krberror);
1407 }
1408 #else /* MIT */
1409 {
1410 krb5_error *krberror;
1411
1412 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1413 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1414 error_message(ret)));
1415 return ret;
1416 }
1417
1418 if (krberror->e_data.data == NULL) {
1419 ret = ERROR_TABLE_BASE_krb5 + (krb5_error_code) krberror->error;
1420 got_error_code = True;
1421 }
1422 smb_krb5_free_error(context, krberror);
1423 }
1424 #endif
1425 if (got_error_code) {
1426 DEBUG(5,("handle_krberror_packet: got KERBERR from kpasswd: %s (%d)\n",
1427 error_message(ret), ret));
1428 }
1429 return ret;
1430 }
1431
1432 krb5_error_code smb_krb5_get_init_creds_opt_alloc(krb5_context context,
1433 krb5_get_init_creds_opt **opt)
1434 {
1435 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
1436 /* Heimdal or modern MIT version */
1437 return krb5_get_init_creds_opt_alloc(context, opt);
1438 #else
1439 /* Historical MIT version */
1440 krb5_get_init_creds_opt *my_opt;
1441
1442 *opt = NULL;
1443
1444 if ((my_opt = SMB_MALLOC_P(krb5_get_init_creds_opt)) == NULL) {
1445 return ENOMEM;
1446 }
1447
1448 krb5_get_init_creds_opt_init(my_opt);
1449
1450 *opt = my_opt;
1451 return 0;
1452 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC */
1453 }
1454
1455 void smb_krb5_get_init_creds_opt_free(krb5_context context,
1456 krb5_get_init_creds_opt *opt)
1457 {
1458 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_FREE
1459
1460 #ifdef KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT
1461 /* Modern MIT or Heimdal version */
1462 krb5_get_init_creds_opt_free(context, opt);
1463 #else
1464 /* Heimdal version */
1465 krb5_get_init_creds_opt_free(opt);
1466 #endif /* KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT */
1467
1468 #else /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1469 /* Historical MIT version */
1470 SAFE_FREE(opt);
1471 opt = NULL;
1472 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1473 }
1474
1475 krb5_enctype smb_get_enctype_from_kt_entry(const krb5_keytab_entry *kt_entry)
1476 {
1477 #ifdef HAVE_KRB5_KEYTAB_ENTRY_KEY /* MIT */
1478 return kt_entry->key.enctype;
1479 #elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK) /* Heimdal */
1480 return kt_entry->keyblock.keytype;
1481 #else
1482 #error UNKNOWN_KRB5_KEYTAB_ENTRY_KEYBLOCK_FORMAT
1483 #endif
1484 }
1485
1486
1487 /* caller needs to free etype_s */
1488 krb5_error_code smb_krb5_enctype_to_string(krb5_context context,
1489 krb5_enctype enctype,
1490 char **etype_s)
1491 {
1492 #ifdef HAVE_KRB5_ENCTYPE_TO_STRING_WITH_KRB5_CONTEXT_ARG
1493 return krb5_enctype_to_string(context, enctype, etype_s); /* Heimdal */
1494 #elif defined(HAVE_KRB5_ENCTYPE_TO_STRING_WITH_SIZE_T_ARG)
1495 char buf[256];
1496 krb5_error_code ret = krb5_enctype_to_string(enctype, buf, 256); /* MIT */
1497 if (ret) {
1498 return ret;
1499 }
1500 *etype_s = SMB_STRDUP(buf);
1501 if (!*etype_s) {
1502 return ENOMEM;
1503 }
1504 return ret;
1505 #else
1506 #error UNKNOWN_KRB5_ENCTYPE_TO_STRING_FUNCTION
1507 #endif
1508 }
1509
1510 krb5_error_code smb_krb5_mk_error(krb5_context context,
1511 krb5_error_code error_code,
1512 const krb5_principal server,
1513 krb5_data *reply)
1514 {
1515 #ifdef HAVE_SHORT_KRB5_MK_ERROR_INTERFACE /* MIT */
1516 /*
1517 * The MIT interface is *terrible*.
1518 * We have to construct this ourselves...
1519 */
1520 krb5_error e;
1521
1522 memset(&e, 0, sizeof(e));
1523 krb5_us_timeofday(context, &e.stime, &e.susec);
1524 e.server = server;
1525 #if defined(krb5_err_base)
1526 e.error = error_code - krb5_err_base;
1527 #elif defined(ERROR_TABLE_BASE_krb5)
1528 e.error = error_code - ERROR_TABLE_BASE_krb5;
1529 #else
1530 e.error = error_code; /* Almost certainly wrong, but what can we do... ? */
1531 #endif
1532
1533 return krb5_mk_error(context, &e, reply);
1534 #else /* Heimdal. */
1535 return krb5_mk_error(context,
1536 error_code,
1537 NULL,
1538 NULL, /* e_data */
1539 NULL,
1540 server,
1541 NULL,
1542 NULL,
1543 reply);
1544 #endif
1545 }
1546
1547 /**********************************************************************
1548 * Open a krb5 keytab with flags, handles readonly or readwrite access and
1549 * allows to process non-default keytab names.
1550 * @param context krb5_context
1551 * @param keytab_name_req string
1552 * @param write_access BOOL if writable keytab is required
1553 * @param krb5_keytab pointer to krb5_keytab (close with krb5_kt_close())
1554 * @return krb5_error_code
1555 **********************************************************************/
1556
1557 /* This MAX_NAME_LEN is a constant defined in krb5.h */
1558 #ifndef MAX_KEYTAB_NAME_LEN
1559 #define MAX_KEYTAB_NAME_LEN 1100
1560 #endif
1561
1562 krb5_error_code smb_krb5_open_keytab(krb5_context context,
1563 const char *keytab_name_req,
1564 BOOL write_access,
1565 krb5_keytab *keytab)
1566 {
1567 krb5_error_code ret = 0;
1568 TALLOC_CTX *mem_ctx;
1569 char keytab_string[MAX_KEYTAB_NAME_LEN];
1570 BOOL found_valid_name = False;
1571 const char *pragma = "FILE";
1572 const char *tmp = NULL;
1573
1574 if (!write_access && !keytab_name_req) {
1575 /* caller just wants to read the default keytab readonly, so be it */
1576 return krb5_kt_default(context, keytab);
1577 }
1578
1579 mem_ctx = talloc_init("smb_krb5_open_keytab");
1580 if (!mem_ctx) {
1581 return ENOMEM;
1582 }
1583
1584 #ifdef HAVE_WRFILE_KEYTAB
1585 if (write_access) {
1586 pragma = "WRFILE";
1587 }
1588 #endif
1589
1590 if (keytab_name_req) {
1591
1592 if (strlen(keytab_name_req) > MAX_KEYTAB_NAME_LEN) {
1593 ret = KRB5_CONFIG_NOTENUFSPACE;
1594 goto out;
1595 }
1596
1597 if ((strncmp(keytab_name_req, "WRFILE:/", 8) == 0) ||
1598 (strncmp(keytab_name_req, "FILE:/", 6) == 0)) {
1599 tmp = keytab_name_req;
1600 goto resolve;
1601 }
1602
1603 if (keytab_name_req[0] != '/') {
1604 ret = KRB5_KT_BADNAME;
1605 goto out;
1606 }
1607
1608 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, keytab_name_req);
1609 if (!tmp) {
1610 ret = ENOMEM;
1611 goto out;
1612 }
1613
1614 goto resolve;
1615 }
1616
1617 /* we need to handle more complex keytab_strings, like:
1618 * "ANY:FILE:/etc/krb5.keytab,krb4:/etc/srvtab" */
1619
1620 ret = krb5_kt_default_name(context, &keytab_string[0], MAX_KEYTAB_NAME_LEN - 2);
1621 if (ret) {
1622 goto out;
1623 }
1624
1625 DEBUG(10,("smb_krb5_open_keytab: krb5_kt_default_name returned %s\n", keytab_string));
1626
1627 tmp = talloc_strdup(mem_ctx, keytab_string);
1628 if (!tmp) {
1629 ret = ENOMEM;
1630 goto out;
1631 }
1632
1633 if (strncmp(tmp, "ANY:", 4) == 0) {
1634 tmp += 4;
1635 }
1636
1637 memset(&keytab_string, '\0', sizeof(keytab_string));
1638
1639 while (next_token(&tmp, keytab_string, ",", sizeof(keytab_string))) {
1640
1641 if (strncmp(keytab_string, "WRFILE:", 7) == 0) {
1642 found_valid_name = True;
1643 tmp = keytab_string;
1644 tmp += 7;
1645 }
1646
1647 if (strncmp(keytab_string, "FILE:", 5) == 0) {
1648 found_valid_name = True;
1649 tmp = keytab_string;
1650 tmp += 5;
1651 }
1652
1653 if (found_valid_name) {
1654
1655 if (tmp[0] != '/') {
1656 ret = KRB5_KT_BADNAME;
1657 goto out;
1658 }
1659
1660 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, tmp);
1661 if (!tmp) {
1662 ret = ENOMEM;
1663 goto out;
1664 }
1665 break;
1666 }
1667 }
1668
1669 if (!found_valid_name) {
1670 ret = KRB5_KT_UNKNOWN_TYPE;
1671 goto out;
1672 }
1673
1674 resolve:
1675 DEBUG(10,("smb_krb5_open_keytab: resolving: %s\n", tmp));
1676 ret = krb5_kt_resolve(context, tmp, keytab);
1677
1678 out:
1679 TALLOC_FREE(mem_ctx);
1680 return ret;
1681 }
1682
1683 #else /* HAVE_KRB5 */
1684 /* this saves a few linking headaches */
1685 int cli_krb5_get_ticket(const char *principal, time_t time_offset,
1686 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5, uint32 extra_ap_opts,
1687 const char *ccname, time_t *tgs_expire)
1688 {
1689 DEBUG(0,("NO KERBEROS SUPPORT\n"));
1690 return 1;
1691 }
1692
1693 #endif