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s3: Lift the server_messaging_context from notify_job_status
[Samba/gbeck.git] / source3 / libsmb / clikrb5.c
blob4eb43cfff1d1f005241ef4a5f6999d82e0a2c633
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 2005-2009
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 #include "includes.h"
24 #include "smb_krb5.h"
25 #include "../librpc/gen_ndr/krb5pac.h"
26
27 #ifndef KRB5_AUTHDATA_WIN2K_PAC
28 #define KRB5_AUTHDATA_WIN2K_PAC 128
29 #endif
30
31 #ifndef KRB5_AUTHDATA_IF_RELEVANT
32 #define KRB5_AUTHDATA_IF_RELEVANT 1
33 #endif
34
35 #ifdef HAVE_KRB5
36
37 #define GSSAPI_CHECKSUM 0x8003 /* Checksum type value for Kerberos */
38 #define GSSAPI_BNDLENGTH 16 /* Bind Length (rfc-1964 pg.3) */
39 #define GSSAPI_CHECKSUM_SIZE (4+GSSAPI_BNDLENGTH+4) /* Length of bind length,
40 bind field, flags field. */
41
42 /* MIT krb5 1.7beta3 (in Ubuntu Karmic) is missing the prototype,
43 but still has the symbol */
44 #if !HAVE_DECL_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE
45 krb5_error_code krb5_auth_con_set_req_cksumtype(
46 krb5_context context,
47 krb5_auth_context auth_context,
48 krb5_cksumtype cksumtype);
49 #endif
50
51 /**************************************************************
52 Wrappers around kerberos string functions that convert from
53 utf8 -> unix charset and vica versa.
54 **************************************************************/
55
56 /**************************************************************
57 krb5_parse_name that takes a UNIX charset.
58 **************************************************************/
59
60 krb5_error_code smb_krb5_parse_name(krb5_context context,
61 const char *name, /* in unix charset */
62 krb5_principal *principal)
63 {
64 krb5_error_code ret;
65 char *utf8_name;
66 size_t converted_size;
67
68 if (!push_utf8_talloc(talloc_tos(), &utf8_name, name, &converted_size)) {
69 return ENOMEM;
70 }
71
72 ret = krb5_parse_name(context, utf8_name, principal);
73 TALLOC_FREE(utf8_name);
74 return ret;
75 }
76
77 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
78 /**************************************************************
79 krb5_parse_name_norealm that takes a UNIX charset.
80 **************************************************************/
81
82 static krb5_error_code smb_krb5_parse_name_norealm_conv(krb5_context context,
83 const char *name, /* in unix charset */
84 krb5_principal *principal)
85 {
86 krb5_error_code ret;
87 char *utf8_name;
88 size_t converted_size;
89
90 *principal = NULL;
91 if (!push_utf8_talloc(talloc_tos(), &utf8_name, name, &converted_size)) {
92 return ENOMEM;
93 }
94
95 ret = krb5_parse_name_norealm(context, utf8_name, principal);
96 TALLOC_FREE(utf8_name);
97 return ret;
98 }
99 #endif
100
101 /**************************************************************
102 krb5_parse_name that returns a UNIX charset name. Must
103 be freed with talloc_free() call.
104 **************************************************************/
105
106 krb5_error_code smb_krb5_unparse_name(TALLOC_CTX *mem_ctx,
107 krb5_context context,
108 krb5_const_principal principal,
109 char **unix_name)
110 {
111 krb5_error_code ret;
112 char *utf8_name;
113 size_t converted_size;
114
115 *unix_name = NULL;
116 ret = krb5_unparse_name(context, principal, &utf8_name);
117 if (ret) {
118 return ret;
119 }
120
121 if (!pull_utf8_talloc(mem_ctx, unix_name, utf8_name, &converted_size)) {
122 krb5_free_unparsed_name(context, utf8_name);
123 return ENOMEM;
124 }
125 krb5_free_unparsed_name(context, utf8_name);
126 return 0;
127 }
128
129 #ifndef HAVE_KRB5_SET_REAL_TIME
130 /*
131 * This function is not in the Heimdal mainline.
132 */
133 krb5_error_code krb5_set_real_time(krb5_context context, int32_t seconds, int32_t microseconds)
134 {
135 krb5_error_code ret;
136 int32_t sec, usec;
137
138 ret = krb5_us_timeofday(context, &sec, &usec);
139 if (ret)
140 return ret;
141
142 context->kdc_sec_offset = seconds - sec;
143 context->kdc_usec_offset = microseconds - usec;
144
145 return 0;
146 }
147 #endif
148
149 #if !defined(HAVE_KRB5_SET_DEFAULT_TGS_KTYPES)
150
151 #if defined(HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES)
152
153 /* With MIT kerberos, we should use krb5_set_default_tgs_enctypes in preference
154 * to krb5_set_default_tgs_ktypes. See
155 * http://lists.samba.org/archive/samba-technical/2006-July/048271.html
156 *
157 * If the MIT libraries are not exporting internal symbols, we will end up in
158 * this branch, which is correct. Otherwise we will continue to use the
159 * internal symbol
160 */
161 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
162 {
163 return krb5_set_default_tgs_enctypes(ctx, enc);
164 }
165
166 #elif defined(HAVE_KRB5_SET_DEFAULT_IN_TKT_ETYPES)
167
168 /* Heimdal */
169 krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
170 {
171 return krb5_set_default_in_tkt_etypes(ctx, enc);
172 }
173
174 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES */
175
176 #endif /* HAVE_KRB5_SET_DEFAULT_TGS_KTYPES */
177
178 #if defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS)
179 /* HEIMDAL */
180 bool setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr)
181 {
182 memset(pkaddr, '\0', sizeof(krb5_address));
183 #if defined(HAVE_IPV6) && defined(KRB5_ADDRESS_INET6)
184 if (paddr->ss_family == AF_INET6) {
185 pkaddr->addr_type = KRB5_ADDRESS_INET6;
186 pkaddr->address.length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
187 pkaddr->address.data = (char *)&(((struct sockaddr_in6 *)paddr)->sin6_addr);
188 return true;
189 }
190 #endif
191 if (paddr->ss_family == AF_INET) {
192 pkaddr->addr_type = KRB5_ADDRESS_INET;
193 pkaddr->address.length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
194 pkaddr->address.data = (char *)&(((struct sockaddr_in *)paddr)->sin_addr);
195 return true;
196 }
197 return false;
198 }
199 #elif defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS)
200 /* MIT */
201 bool setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr)
202 {
203 memset(pkaddr, '\0', sizeof(krb5_address));
204 #if defined(HAVE_IPV6) && defined(ADDRTYPE_INET6)
205 if (paddr->ss_family == AF_INET6) {
206 pkaddr->addrtype = ADDRTYPE_INET6;
207 pkaddr->length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
208 pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in6 *)paddr)->sin6_addr);
209 return true;
210 }
211 #endif
212 if (paddr->ss_family == AF_INET) {
213 pkaddr->addrtype = ADDRTYPE_INET;
214 pkaddr->length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
215 pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in *)paddr)->sin_addr);
216 return true;
217 }
218 return false;
219 }
220 #else
221 #error UNKNOWN_ADDRTYPE
222 #endif
223
224 #if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_USE_ENCTYPE) && defined(HAVE_KRB5_STRING_TO_KEY) && defined(HAVE_KRB5_ENCRYPT_BLOCK)
225 static int create_kerberos_key_from_string_direct(krb5_context context,
226 krb5_principal host_princ,
227 krb5_data *password,
228 krb5_keyblock *key,
229 krb5_enctype enctype)
230 {
231 int ret = 0;
232 krb5_data salt;
233 krb5_encrypt_block eblock;
234
235 ret = krb5_principal2salt(context, host_princ, &salt);
236 if (ret) {
237 DEBUG(1,("krb5_principal2salt failed (%s)\n", error_message(ret)));
238 return ret;
239 }
240 krb5_use_enctype(context, &eblock, enctype);
241 ret = krb5_string_to_key(context, &eblock, key, password, &salt);
242 SAFE_FREE(salt.data);
243
244 return ret;
245 }
246 #elif defined(HAVE_KRB5_GET_PW_SALT) && defined(HAVE_KRB5_STRING_TO_KEY_SALT)
247 static int create_kerberos_key_from_string_direct(krb5_context context,
248 krb5_principal host_princ,
249 krb5_data *password,
250 krb5_keyblock *key,
251 krb5_enctype enctype)
252 {
253 int ret;
254 krb5_salt salt;
255
256 ret = krb5_get_pw_salt(context, host_princ, &salt);
257 if (ret) {
258 DEBUG(1,("krb5_get_pw_salt failed (%s)\n", error_message(ret)));
259 return ret;
260 }
261
262 ret = krb5_string_to_key_salt(context, enctype, (const char *)password->data, salt, key);
263 krb5_free_salt(context, salt);
264
265 return ret;
266 }
267 #else
268 #error UNKNOWN_CREATE_KEY_FUNCTIONS
269 #endif
270
271 int create_kerberos_key_from_string(krb5_context context,
272 krb5_principal host_princ,
273 krb5_data *password,
274 krb5_keyblock *key,
275 krb5_enctype enctype,
276 bool no_salt)
277 {
278 krb5_principal salt_princ = NULL;
279 int ret;
280 /*
281 * Check if we've determined that the KDC is salting keys for this
282 * principal/enctype in a non-obvious way. If it is, try to match
283 * its behavior.
284 */
285 if (no_salt) {
286 KRB5_KEY_DATA(key) = (KRB5_KEY_DATA_CAST *)SMB_MALLOC(password->length);
287 if (!KRB5_KEY_DATA(key)) {
288 return ENOMEM;
289 }
290 memcpy(KRB5_KEY_DATA(key), password->data, password->length);
291 KRB5_KEY_LENGTH(key) = password->length;
292 KRB5_KEY_TYPE(key) = enctype;
293 return 0;
294 }
295 salt_princ = kerberos_fetch_salt_princ_for_host_princ(context, host_princ, enctype);
296 ret = create_kerberos_key_from_string_direct(context, salt_princ ? salt_princ : host_princ, password, key, enctype);
297 if (salt_princ) {
298 krb5_free_principal(context, salt_princ);
299 }
300 return ret;
301 }
302
303 #if defined(HAVE_KRB5_GET_PERMITTED_ENCTYPES)
304 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
305 krb5_enctype **enctypes)
306 {
307 return krb5_get_permitted_enctypes(context, enctypes);
308 }
309 #elif defined(HAVE_KRB5_GET_DEFAULT_IN_TKT_ETYPES)
310 krb5_error_code get_kerberos_allowed_etypes(krb5_context context,
311 krb5_enctype **enctypes)
312 {
313 return krb5_get_default_in_tkt_etypes(context, enctypes);
314 }
315 #else
316 #error UNKNOWN_GET_ENCTYPES_FUNCTIONS
317 #endif
318
319 #if defined(HAVE_KRB5_AUTH_CON_SETKEY) && !defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY)
320 krb5_error_code krb5_auth_con_setuseruserkey(krb5_context context,
321 krb5_auth_context auth_context,
322 krb5_keyblock *keyblock)
323 {
324 return krb5_auth_con_setkey(context, auth_context, keyblock);
325 }
326 #endif
327
328 bool unwrap_edata_ntstatus(TALLOC_CTX *mem_ctx,
329 DATA_BLOB *edata,
330 DATA_BLOB *edata_out)
331 {
332 DATA_BLOB edata_contents;
333 ASN1_DATA *data;
334 int edata_type;
335
336 if (!edata->length) {
337 return False;
338 }
339
340 data = asn1_init(mem_ctx);
341 if (data == NULL) {
342 return false;
343 }
344
345 asn1_load(data, *edata);
346 asn1_start_tag(data, ASN1_SEQUENCE(0));
347 asn1_start_tag(data, ASN1_CONTEXT(1));
348 asn1_read_Integer(data, &edata_type);
349
350 if (edata_type != KRB5_PADATA_PW_SALT) {
351 DEBUG(0,("edata is not of required type %d but of type %d\n",
352 KRB5_PADATA_PW_SALT, edata_type));
353 asn1_free(data);
354 return False;
355 }
356
357 asn1_start_tag(data, ASN1_CONTEXT(2));
358 asn1_read_OctetString(data, talloc_autofree_context(), &edata_contents);
359 asn1_end_tag(data);
360 asn1_end_tag(data);
361 asn1_end_tag(data);
362 asn1_free(data);
363
364 *edata_out = data_blob_talloc(mem_ctx, edata_contents.data, edata_contents.length);
365
366 data_blob_free(&edata_contents);
367
368 return True;
369 }
370
371
372 bool unwrap_pac(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, DATA_BLOB *unwrapped_pac_data)
373 {
374 DATA_BLOB pac_contents;
375 ASN1_DATA *data;
376 int data_type;
377
378 if (!auth_data->length) {
379 return False;
380 }
381
382 data = asn1_init(mem_ctx);
383 if (data == NULL) {
384 return false;
385 }
386
387 asn1_load(data, *auth_data);
388 asn1_start_tag(data, ASN1_SEQUENCE(0));
389 asn1_start_tag(data, ASN1_SEQUENCE(0));
390 asn1_start_tag(data, ASN1_CONTEXT(0));
391 asn1_read_Integer(data, &data_type);
392
393 if (data_type != KRB5_AUTHDATA_WIN2K_PAC ) {
394 DEBUG(10,("authorization data is not a Windows PAC (type: %d)\n", data_type));
395 asn1_free(data);
396 return False;
397 }
398
399 asn1_end_tag(data);
400 asn1_start_tag(data, ASN1_CONTEXT(1));
401 asn1_read_OctetString(data, talloc_autofree_context(), &pac_contents);
402 asn1_end_tag(data);
403 asn1_end_tag(data);
404 asn1_end_tag(data);
405 asn1_free(data);
406
407 *unwrapped_pac_data = data_blob_talloc(mem_ctx, pac_contents.data, pac_contents.length);
408
409 data_blob_free(&pac_contents);
410
411 return True;
412 }
413
414 bool get_auth_data_from_tkt(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, krb5_ticket *tkt)
415 {
416 DATA_BLOB auth_data_wrapped;
417 bool got_auth_data_pac = False;
418 int i;
419
420 #if defined(HAVE_KRB5_TKT_ENC_PART2)
421 if (tkt->enc_part2 && tkt->enc_part2->authorization_data &&
422 tkt->enc_part2->authorization_data[0] &&
423 tkt->enc_part2->authorization_data[0]->length)
424 {
425 for (i = 0; tkt->enc_part2->authorization_data[i] != NULL; i++) {
426
427 if (tkt->enc_part2->authorization_data[i]->ad_type !=
428 KRB5_AUTHDATA_IF_RELEVANT) {
429 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
430 tkt->enc_part2->authorization_data[i]->ad_type));
431 continue;
432 }
433
434 auth_data_wrapped = data_blob(tkt->enc_part2->authorization_data[i]->contents,
435 tkt->enc_part2->authorization_data[i]->length);
436
437 /* check if it is a PAC */
438 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
439 data_blob_free(&auth_data_wrapped);
440
441 if (got_auth_data_pac) {
442 return true;
443 }
444 }
445
446 return got_auth_data_pac;
447 }
448
449 #else
450 if (tkt->ticket.authorization_data &&
451 tkt->ticket.authorization_data->len)
452 {
453 for (i = 0; i < tkt->ticket.authorization_data->len; i++) {
454
455 if (tkt->ticket.authorization_data->val[i].ad_type !=
456 KRB5_AUTHDATA_IF_RELEVANT) {
457 DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
458 tkt->ticket.authorization_data->val[i].ad_type));
459 continue;
460 }
461
462 auth_data_wrapped = data_blob(tkt->ticket.authorization_data->val[i].ad_data.data,
463 tkt->ticket.authorization_data->val[i].ad_data.length);
464
465 /* check if it is a PAC */
466 got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
467 data_blob_free(&auth_data_wrapped);
468
469 if (got_auth_data_pac) {
470 return true;
471 }
472 }
473
474 return got_auth_data_pac;
475 }
476 #endif
477 return False;
478 }
479
480 krb5_const_principal get_principal_from_tkt(krb5_ticket *tkt)
481 {
482 #if defined(HAVE_KRB5_TKT_ENC_PART2)
483 return tkt->enc_part2->client;
484 #else
485 return tkt->client;
486 #endif
487 }
488
489 #if !defined(HAVE_KRB5_LOCATE_KDC)
490
491 /* krb5_locate_kdc is an internal MIT symbol. MIT are not yet willing to commit
492 * to a public interface for this functionality, so we have to be able to live
493 * without it if the MIT libraries are hiding their internal symbols.
494 */
495
496 #if defined(KRB5_KRBHST_INIT)
497 /* Heimdal */
498 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm, struct sockaddr **addr_pp, int *naddrs, int get_masters)
499 {
500 krb5_krbhst_handle hnd;
501 krb5_krbhst_info *hinfo;
502 krb5_error_code rc;
503 int num_kdcs, i;
504 struct sockaddr *sa;
505 struct addrinfo *ai;
506
507 *addr_pp = NULL;
508 *naddrs = 0;
509
510 rc = krb5_krbhst_init(ctx, realm->data, KRB5_KRBHST_KDC, &hnd);
511 if (rc) {
512 DEBUG(0, ("smb_krb5_locate_kdc: krb5_krbhst_init failed (%s)\n", error_message(rc)));
513 return rc;
514 }
515
516 for ( num_kdcs = 0; (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); num_kdcs++)
517 ;
518
519 krb5_krbhst_reset(ctx, hnd);
520
521 if (!num_kdcs) {
522 DEBUG(0, ("smb_krb5_locate_kdc: zero kdcs found !\n"));
523 krb5_krbhst_free(ctx, hnd);
524 return -1;
525 }
526
527 sa = SMB_MALLOC_ARRAY( struct sockaddr, num_kdcs );
528 if (!sa) {
529 DEBUG(0, ("smb_krb5_locate_kdc: malloc failed\n"));
530 krb5_krbhst_free(ctx, hnd);
531 naddrs = 0;
532 return -1;
533 }
534
535 memset(sa, '\0', sizeof(struct sockaddr) * num_kdcs );
536
537 for (i = 0; i < num_kdcs && (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); i++) {
538
539 #if defined(HAVE_KRB5_KRBHST_GET_ADDRINFO)
540 rc = krb5_krbhst_get_addrinfo(ctx, hinfo, &ai);
541 if (rc) {
542 DEBUG(0,("krb5_krbhst_get_addrinfo failed: %s\n", error_message(rc)));
543 continue;
544 }
545 #endif
546 if (hinfo->ai && hinfo->ai->ai_family == AF_INET)
547 memcpy(&sa[i], hinfo->ai->ai_addr, sizeof(struct sockaddr));
548 }
549
550 krb5_krbhst_free(ctx, hnd);
551
552 *naddrs = num_kdcs;
553 *addr_pp = sa;
554 return 0;
555 }
556
557 #else /* ! defined(KRB5_KRBHST_INIT) */
558
559 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
560 struct sockaddr **addr_pp, int *naddrs, int get_masters)
561 {
562 DEBUG(0, ("unable to explicitly locate the KDC on this platform\n"));
563 return KRB5_KDC_UNREACH;
564 }
565
566 #endif /* KRB5_KRBHST_INIT */
567
568 #else /* ! HAVE_KRB5_LOCATE_KDC */
569
570 krb5_error_code smb_krb5_locate_kdc(krb5_context ctx, const krb5_data *realm,
571 struct sockaddr **addr_pp, int *naddrs, int get_masters)
572 {
573 return krb5_locate_kdc(ctx, realm, addr_pp, naddrs, get_masters);
574 }
575
576 #endif /* HAVE_KRB5_LOCATE_KDC */
577
578 #if !defined(HAVE_KRB5_FREE_UNPARSED_NAME)
579 void krb5_free_unparsed_name(krb5_context context, char *val)
580 {
581 SAFE_FREE(val);
582 }
583 #endif
584
585 void kerberos_free_data_contents(krb5_context context, krb5_data *pdata)
586 {
587 #if defined(HAVE_KRB5_FREE_DATA_CONTENTS)
588 if (pdata->data) {
589 krb5_free_data_contents(context, pdata);
590 }
591 #else
592 SAFE_FREE(pdata->data);
593 #endif
594 }
595
596 void kerberos_set_creds_enctype(krb5_creds *pcreds, int enctype)
597 {
598 #if defined(HAVE_KRB5_KEYBLOCK_IN_CREDS)
599 KRB5_KEY_TYPE((&pcreds->keyblock)) = enctype;
600 #elif defined(HAVE_KRB5_SESSION_IN_CREDS)
601 KRB5_KEY_TYPE((&pcreds->session)) = enctype;
602 #else
603 #error UNKNOWN_KEYBLOCK_MEMBER_IN_KRB5_CREDS_STRUCT
604 #endif
605 }
606
607 bool kerberos_compatible_enctypes(krb5_context context,
608 krb5_enctype enctype1,
609 krb5_enctype enctype2)
610 {
611 #if defined(HAVE_KRB5_C_ENCTYPE_COMPARE)
612 krb5_boolean similar = 0;
613
614 krb5_c_enctype_compare(context, enctype1, enctype2, &similar);
615 return similar ? True : False;
616 #elif defined(HAVE_KRB5_ENCTYPES_COMPATIBLE_KEYS)
617 return krb5_enctypes_compatible_keys(context, enctype1, enctype2) ? True : False;
618 #endif
619 }
620
621 static bool ads_cleanup_expired_creds(krb5_context context,
622 krb5_ccache ccache,
623 krb5_creds *credsp)
624 {
625 krb5_error_code retval;
626 const char *cc_type = krb5_cc_get_type(context, ccache);
627
628 DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
629 cc_type, krb5_cc_get_name(context, ccache),
630 http_timestring(talloc_tos(), credsp->times.endtime)));
631
632 /* we will probably need new tickets if the current ones
633 will expire within 10 seconds.
634 */
635 if (credsp->times.endtime >= (time(NULL) + 10))
636 return False;
637
638 /* heimdal won't remove creds from a file ccache, and
639 perhaps we shouldn't anyway, since internally we
640 use memory ccaches, and a FILE one probably means that
641 we're using creds obtained outside of our exectuable
642 */
643 if (strequal(cc_type, "FILE")) {
644 DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a %s ccache\n", cc_type));
645 return False;
646 }
647
648 retval = krb5_cc_remove_cred(context, ccache, 0, credsp);
649 if (retval) {
650 DEBUG(1, ("ads_cleanup_expired_creds: krb5_cc_remove_cred failed, err %s\n",
651 error_message(retval)));
652 /* If we have an error in this, we want to display it,
653 but continue as though we deleted it */
654 }
655 return True;
656 }
657
658 /* Allocate and setup the auth context into the state we need. */
659
660 static krb5_error_code setup_auth_context(krb5_context context,
661 krb5_auth_context *auth_context)
662 {
663 krb5_error_code retval;
664
665 retval = krb5_auth_con_init(context, auth_context );
666 if (retval) {
667 DEBUG(1,("krb5_auth_con_init failed (%s)\n",
668 error_message(retval)));
669 return retval;
670 }
671
672 /* Ensure this is an addressless ticket. */
673 retval = krb5_auth_con_setaddrs(context, *auth_context, NULL, NULL);
674 if (retval) {
675 DEBUG(1,("krb5_auth_con_setaddrs failed (%s)\n",
676 error_message(retval)));
677 }
678
679 return retval;
680 }
681
682 static krb5_error_code create_gss_checksum(krb5_data *in_data, /* [inout] */
683 uint32_t gss_flags)
684 {
685 unsigned int orig_length = in_data->length;
686 unsigned int base_cksum_size = GSSAPI_CHECKSUM_SIZE;
687 char *gss_cksum = NULL;
688
689 if (orig_length) {
690 /* Extra length field for delgated ticket. */
691 base_cksum_size += 4;
692 }
693
694 if ((unsigned int)base_cksum_size + orig_length <
695 (unsigned int)base_cksum_size) {
696 return EINVAL;
697 }
698
699 gss_cksum = (char *)SMB_MALLOC(base_cksum_size + orig_length);
700 if (gss_cksum == NULL) {
701 return ENOMEM;
702 }
703
704 memset(gss_cksum, '\0', base_cksum_size + orig_length);
705 SIVAL(gss_cksum, 0, GSSAPI_BNDLENGTH);
706
707 /* Precalculated MD5sum of NULL channel bindings (20 bytes) */
708 /* Channel bindings are: (all ints encoded as little endian)
709
710 [4 bytes] initiator_addrtype (255 for null bindings)
711 [4 bytes] initiator_address length
712 [n bytes] .. initiator_address data - not present
713 in null bindings.
714 [4 bytes] acceptor_addrtype (255 for null bindings)
715 [4 bytes] acceptor_address length
716 [n bytes] .. acceptor_address data - not present
717 in null bindings.
718 [4 bytes] application_data length
719 [n bytes] .. application_ data - not present
720 in null bindings.
721 MD5 of this is ""\x14\x8f\x0c\xf7\xb1u\xdey*J\x9a%\xdfV\xc5\x18"
722 */
723
724 memcpy(&gss_cksum[4],
725 "\x14\x8f\x0c\xf7\xb1u\xdey*J\x9a%\xdfV\xc5\x18",
726 GSSAPI_BNDLENGTH);
727
728 SIVAL(gss_cksum, 20, gss_flags);
729
730 if (orig_length) {
731 SSVAL(gss_cksum, 24, 1); /* The Delegation Option identifier */
732 SSVAL(gss_cksum, 26, orig_length);
733 /* Copy the kerberos KRB_CRED data */
734 memcpy(gss_cksum + 28, in_data->data, orig_length);
735 free(in_data->data);
736 in_data->data = NULL;
737 in_data->length = 0;
738 }
739 in_data->data = gss_cksum;
740 in_data->length = base_cksum_size + orig_length;
741 return 0;
742 }
743
744 /*
745 we can't use krb5_mk_req because w2k wants the service to be in a particular format
746 */
747 static krb5_error_code ads_krb5_mk_req(krb5_context context,
748 krb5_auth_context *auth_context,
749 const krb5_flags ap_req_options,
750 const char *principal,
751 krb5_ccache ccache,
752 krb5_data *outbuf,
753 time_t *expire_time,
754 const char *impersonate_princ_s)
755 {
756 krb5_error_code retval;
757 krb5_principal server;
758 krb5_principal impersonate_princ = NULL;
759 krb5_creds * credsp;
760 krb5_creds creds;
761 krb5_data in_data;
762 bool creds_ready = False;
763 int i = 0, maxtries = 3;
764 uint32_t gss_flags = 0;
765
766 ZERO_STRUCT(in_data);
767
768 retval = smb_krb5_parse_name(context, principal, &server);
769 if (retval) {
770 DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
771 return retval;
772 }
773
774 if (impersonate_princ_s) {
775 retval = smb_krb5_parse_name(context, impersonate_princ_s,
776 &impersonate_princ);
777 if (retval) {
778 DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", impersonate_princ_s));
779 goto cleanup_princ;
780 }
781 }
782
783 /* obtain ticket & session key */
784 ZERO_STRUCT(creds);
785 if ((retval = krb5_copy_principal(context, server, &creds.server))) {
786 DEBUG(1,("ads_krb5_mk_req: krb5_copy_principal failed (%s)\n",
787 error_message(retval)));
788 goto cleanup_princ;
789 }
790
791 if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
792 /* This can commonly fail on smbd startup with no ticket in the cache.
793 * Report at higher level than 1. */
794 DEBUG(3,("ads_krb5_mk_req: krb5_cc_get_principal failed (%s)\n",
795 error_message(retval)));
796 goto cleanup_creds;
797 }
798
799 while (!creds_ready && (i < maxtries)) {
800
801 if ((retval = smb_krb5_get_credentials(context, ccache,
802 creds.client,
803 creds.server,
804 impersonate_princ,
805 &credsp))) {
806 DEBUG(1,("ads_krb5_mk_req: smb_krb5_get_credentials failed for %s (%s)\n",
807 principal, error_message(retval)));
808 goto cleanup_creds;
809 }
810
811 /* cope with ticket being in the future due to clock skew */
812 if ((unsigned)credsp->times.starttime > time(NULL)) {
813 time_t t = time(NULL);
814 int time_offset =(int)((unsigned)credsp->times.starttime-t);
815 DEBUG(4,("ads_krb5_mk_req: Advancing clock by %d seconds to cope with clock skew\n", time_offset));
816 krb5_set_real_time(context, t + time_offset + 1, 0);
817 }
818
819 if (!ads_cleanup_expired_creds(context, ccache, credsp)) {
820 creds_ready = True;
821 }
822
823 i++;
824 }
825
826 DEBUG(10,("ads_krb5_mk_req: Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
827 principal, krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache),
828 http_timestring(talloc_tos(), (unsigned)credsp->times.endtime),
829 (unsigned)credsp->times.endtime));
830
831 if (expire_time) {
832 *expire_time = (time_t)credsp->times.endtime;
833 }
834
835 /* Allocate the auth_context. */
836 retval = setup_auth_context(context, auth_context);
837 if (retval) {
838 DEBUG(1,("setup_auth_context failed (%s)\n",
839 error_message(retval)));
840 goto cleanup_creds;
841 }
842
843 #if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_FWD_TGT_CREDS) && defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY)
844 if( credsp->ticket_flags & TKT_FLG_OK_AS_DELEGATE ) {
845 /* Fetch a forwarded TGT from the KDC so that we can hand off a 2nd ticket
846 as part of the kerberos exchange. */
847
848 DEBUG( 3, ("ads_krb5_mk_req: server marked as OK to delegate to, building forwardable TGT\n") );
849
850 retval = krb5_auth_con_setuseruserkey(context,
851 *auth_context,
852 &credsp->keyblock );
853 if (retval) {
854 DEBUG(1,("krb5_auth_con_setuseruserkey failed (%s)\n",
855 error_message(retval)));
856 goto cleanup_creds;
857 }
858
859 /* Must use a subkey for forwarded tickets. */
860 retval = krb5_auth_con_setflags(context,
861 *auth_context,
862 KRB5_AUTH_CONTEXT_USE_SUBKEY);
863 if (retval) {
864 DEBUG(1,("krb5_auth_con_setflags failed (%s)\n",
865 error_message(retval)));
866 goto cleanup_creds;
867 }
868
869 retval = krb5_fwd_tgt_creds(context,/* Krb5 context [in] */
870 *auth_context, /* Authentication context [in] */
871 CONST_DISCARD(char *, KRB5_TGS_NAME), /* Ticket service name ("krbtgt") [in] */
872 credsp->client, /* Client principal for the tgt [in] */
873 credsp->server, /* Server principal for the tgt [in] */
874 ccache, /* Credential cache to use for storage [in] */
875 1, /* Turn on for "Forwardable ticket" [in] */
876 &in_data ); /* Resulting response [out] */
877
878 if (retval) {
879 DEBUG( 3, ("krb5_fwd_tgt_creds failed (%s)\n",
880 error_message( retval ) ) );
881
882 /*
883 * This is not fatal. Delete the *auth_context and continue
884 * with krb5_mk_req_extended to get a non-forwardable ticket.
885 */
886
887 if (in_data.data) {
888 free( in_data.data );
889 in_data.data = NULL;
890 in_data.length = 0;
891 }
892 krb5_auth_con_free(context, *auth_context);
893 *auth_context = NULL;
894 retval = setup_auth_context(context, auth_context);
895 if (retval) {
896 DEBUG(1,("setup_auth_context failed (%s)\n",
897 error_message(retval)));
898 goto cleanup_creds;
899 }
900 } else {
901 /* We got a delegated ticket. */
902 gss_flags |= GSS_C_DELEG_FLAG;
903 }
904 }
905 #endif
906
907 /* Frees and reallocates in_data into a GSS checksum blob. */
908 retval = create_gss_checksum(&in_data, gss_flags);
909 if (retval) {
910 goto cleanup_data;
911 }
912
913 #if defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE)
914 /* We always want GSS-checksum types. */
915 retval = krb5_auth_con_set_req_cksumtype(context, *auth_context, GSSAPI_CHECKSUM );
916 if (retval) {
917 DEBUG(1,("krb5_auth_con_set_req_cksumtype failed (%s)\n",
918 error_message(retval)));
919 goto cleanup_data;
920 }
921 #endif
922
923 retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
924 &in_data, credsp, outbuf);
925 if (retval) {
926 DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
927 error_message(retval)));
928 }
929
930 cleanup_data:
931 if (in_data.data) {
932 free( in_data.data );
933 in_data.length = 0;
934 }
935
936 krb5_free_creds(context, credsp);
937
938 cleanup_creds:
939 krb5_free_cred_contents(context, &creds);
940
941 cleanup_princ:
942 krb5_free_principal(context, server);
943 if (impersonate_princ) {
944 krb5_free_principal(context, impersonate_princ);
945 }
946
947 return retval;
948 }
949
950 /*
951 get a kerberos5 ticket for the given service
952 */
953 int cli_krb5_get_ticket(TALLOC_CTX *mem_ctx,
954 const char *principal, time_t time_offset,
955 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5,
956 uint32_t extra_ap_opts, const char *ccname,
957 time_t *tgs_expire,
958 const char *impersonate_princ_s)
959
960 {
961 krb5_error_code retval;
962 krb5_data packet;
963 krb5_context context = NULL;
964 krb5_ccache ccdef = NULL;
965 krb5_auth_context auth_context = NULL;
966 krb5_enctype enc_types[] = {
967 #ifdef ENCTYPE_ARCFOUR_HMAC
968 ENCTYPE_ARCFOUR_HMAC,
969 #endif
970 ENCTYPE_DES_CBC_MD5,
971 ENCTYPE_DES_CBC_CRC,
972 ENCTYPE_NULL};
973
974 initialize_krb5_error_table();
975 retval = krb5_init_context(&context);
976 if (retval) {
977 DEBUG(1, ("krb5_init_context failed (%s)\n",
978 error_message(retval)));
979 goto failed;
980 }
981
982 if (time_offset != 0) {
983 krb5_set_real_time(context, time(NULL) + time_offset, 0);
984 }
985
986 if ((retval = krb5_cc_resolve(context, ccname ?
987 ccname : krb5_cc_default_name(context), &ccdef))) {
988 DEBUG(1, ("krb5_cc_default failed (%s)\n",
989 error_message(retval)));
990 goto failed;
991 }
992
993 if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
994 DEBUG(1, ("krb5_set_default_tgs_ktypes failed (%s)\n",
995 error_message(retval)));
996 goto failed;
997 }
998
999 retval = ads_krb5_mk_req(context, &auth_context,
1000 AP_OPTS_USE_SUBKEY | (krb5_flags)extra_ap_opts,
1001 principal, ccdef, &packet,
1002 tgs_expire, impersonate_princ_s);
1003 if (retval) {
1004 goto failed;
1005 }
1006
1007 get_krb5_smb_session_key(mem_ctx, context, auth_context,
1008 session_key_krb5, false);
1009
1010 *ticket = data_blob_talloc(mem_ctx, packet.data, packet.length);
1011
1012 kerberos_free_data_contents(context, &packet);
1013
1014 failed:
1015
1016 if (context) {
1017 if (ccdef)
1018 krb5_cc_close(context, ccdef);
1019 if (auth_context)
1020 krb5_auth_con_free(context, auth_context);
1021 krb5_free_context(context);
1022 }
1023
1024 return retval;
1025 }
1026
1027 bool get_krb5_smb_session_key(TALLOC_CTX *mem_ctx,
1028 krb5_context context,
1029 krb5_auth_context auth_context,
1030 DATA_BLOB *session_key, bool remote)
1031 {
1032 krb5_keyblock *skey = NULL;
1033 krb5_error_code err = 0;
1034 bool ret = false;
1035
1036 if (remote) {
1037 err = krb5_auth_con_getremotesubkey(context,
1038 auth_context, &skey);
1039 } else {
1040 err = krb5_auth_con_getlocalsubkey(context,
1041 auth_context, &skey);
1042 }
1043
1044 if (err || skey == NULL) {
1045 DEBUG(10, ("KRB5 error getting session key %d\n", err));
1046 goto done;
1047 }
1048
1049 DEBUG(10, ("Got KRB5 session key of length %d\n",
1050 (int)KRB5_KEY_LENGTH(skey)));
1051
1052 *session_key = data_blob_talloc(mem_ctx,
1053 KRB5_KEY_DATA(skey),
1054 KRB5_KEY_LENGTH(skey));
1055 dump_data_pw("KRB5 Session Key:\n",
1056 session_key->data,
1057 session_key->length);
1058
1059 ret = true;
1060
1061 done:
1062 if (skey) {
1063 krb5_free_keyblock(context, skey);
1064 }
1065
1066 return ret;
1067 }
1068
1069
1070 #if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
1071 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i );
1072
1073 const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i )
1074 {
1075 static krb5_data kdata;
1076
1077 kdata.data = (char *)krb5_principal_get_comp_string(context, principal, i);
1078 kdata.length = strlen((const char *)kdata.data);
1079 return &kdata;
1080 }
1081 #endif
1082
1083 krb5_error_code smb_krb5_kt_free_entry(krb5_context context, krb5_keytab_entry *kt_entry)
1084 {
1085 /* Try krb5_free_keytab_entry_contents first, since
1086 * MIT Kerberos >= 1.7 has both krb5_free_keytab_entry_contents and
1087 * krb5_kt_free_entry but only has a prototype for the first, while the
1088 * second is considered private.
1089 */
1090 #if defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
1091 return krb5_free_keytab_entry_contents(context, kt_entry);
1092 #elif defined(HAVE_KRB5_KT_FREE_ENTRY)
1093 return krb5_kt_free_entry(context, kt_entry);
1094 #else
1095 #error UNKNOWN_KT_FREE_FUNCTION
1096 #endif
1097 }
1098
1099 void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum,
1100 struct PAC_SIGNATURE_DATA *sig)
1101 {
1102 #ifdef HAVE_CHECKSUM_IN_KRB5_CHECKSUM
1103 cksum->cksumtype = (krb5_cksumtype)sig->type;
1104 cksum->checksum.length = sig->signature.length;
1105 cksum->checksum.data = sig->signature.data;
1106 #else
1107 cksum->checksum_type = (krb5_cksumtype)sig->type;
1108 cksum->length = sig->signature.length;
1109 cksum->contents = sig->signature.data;
1110 #endif
1111 }
1112
1113 krb5_error_code smb_krb5_verify_checksum(krb5_context context,
1114 const krb5_keyblock *keyblock,
1115 krb5_keyusage usage,
1116 krb5_checksum *cksum,
1117 uint8 *data,
1118 size_t length)
1119 {
1120 krb5_error_code ret;
1121
1122 /* verify the checksum */
1123
1124 /* welcome to the wonderful world of samba's kerberos abstraction layer:
1125 *
1126 * function heimdal 0.6.1rc3 heimdal 0.7 MIT krb 1.4.2
1127 * -----------------------------------------------------------------------------
1128 * krb5_c_verify_checksum - works works
1129 * krb5_verify_checksum works (6 args) works (6 args) broken (7 args)
1130 */
1131
1132 #if defined(HAVE_KRB5_C_VERIFY_CHECKSUM)
1133 {
1134 krb5_boolean checksum_valid = False;
1135 krb5_data input;
1136
1137 input.data = (char *)data;
1138 input.length = length;
1139
1140 ret = krb5_c_verify_checksum(context,
1141 keyblock,
1142 usage,
1143 &input,
1144 cksum,
1145 &checksum_valid);
1146 if (ret) {
1147 DEBUG(3,("smb_krb5_verify_checksum: krb5_c_verify_checksum() failed: %s\n",
1148 error_message(ret)));
1149 return ret;
1150 }
1151
1152 if (!checksum_valid)
1153 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1154 }
1155
1156 #elif KRB5_VERIFY_CHECKSUM_ARGS == 6 && defined(HAVE_KRB5_CRYPTO_INIT) && defined(HAVE_KRB5_CRYPTO) && defined(HAVE_KRB5_CRYPTO_DESTROY)
1157
1158 /* Warning: MIT's krb5_verify_checksum cannot be used as it will use a key
1159 * without enctype and it ignores any key_usage types - Guenther */
1160
1161 {
1162
1163 krb5_crypto crypto;
1164 ret = krb5_crypto_init(context,
1165 keyblock,
1166 0,
1167 &crypto);
1168 if (ret) {
1169 DEBUG(0,("smb_krb5_verify_checksum: krb5_crypto_init() failed: %s\n",
1170 error_message(ret)));
1171 return ret;
1172 }
1173
1174 ret = krb5_verify_checksum(context,
1175 crypto,
1176 usage,
1177 data,
1178 length,
1179 cksum);
1180
1181 krb5_crypto_destroy(context, crypto);
1182 }
1183
1184 #else
1185 #error UNKNOWN_KRB5_VERIFY_CHECKSUM_FUNCTION
1186 #endif
1187
1188 return ret;
1189 }
1190
1191 time_t get_authtime_from_tkt(krb5_ticket *tkt)
1192 {
1193 #if defined(HAVE_KRB5_TKT_ENC_PART2)
1194 return tkt->enc_part2->times.authtime;
1195 #else
1196 return tkt->ticket.authtime;
1197 #endif
1198 }
1199
1200 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
1201 static int get_kvno_from_ap_req(krb5_ap_req *ap_req)
1202 {
1203 #ifdef HAVE_TICKET_POINTER_IN_KRB5_AP_REQ /* MIT */
1204 if (ap_req->ticket->enc_part.kvno)
1205 return ap_req->ticket->enc_part.kvno;
1206 #else /* Heimdal */
1207 if (ap_req->ticket.enc_part.kvno)
1208 return *ap_req->ticket.enc_part.kvno;
1209 #endif
1210 return 0;
1211 }
1212
1213 static krb5_enctype get_enctype_from_ap_req(krb5_ap_req *ap_req)
1214 {
1215 #ifdef HAVE_ETYPE_IN_ENCRYPTEDDATA /* Heimdal */
1216 return ap_req->ticket.enc_part.etype;
1217 #else /* MIT */
1218 return ap_req->ticket->enc_part.enctype;
1219 #endif
1220 }
1221 #endif /* HAVE_KRB5_DECODE_AP_REQ */
1222
1223 static krb5_error_code
1224 get_key_from_keytab(krb5_context context,
1225 krb5_const_principal server,
1226 krb5_enctype enctype,
1227 krb5_kvno kvno,
1228 krb5_keyblock **out_key)
1229 {
1230 krb5_keytab_entry entry;
1231 krb5_error_code ret;
1232 krb5_keytab keytab;
1233 char *name = NULL;
1234 krb5_keyblock *keyp;
1235
1236 /* We have to open a new keytab handle here, as MIT does
1237 an implicit open/getnext/close on krb5_kt_get_entry. We
1238 may be in the middle of a keytab enumeration when this is
1239 called. JRA. */
1240
1241 ret = smb_krb5_open_keytab(context, NULL, False, &keytab);
1242 if (ret) {
1243 DEBUG(1,("get_key_from_keytab: smb_krb5_open_keytab failed (%s)\n", error_message(ret)));
1244 return ret;
1245 }
1246
1247 if ( DEBUGLEVEL >= 10 ) {
1248 if (smb_krb5_unparse_name(talloc_tos(), context, server, &name) == 0) {
1249 DEBUG(10,("get_key_from_keytab: will look for kvno %d, enctype %d and name: %s\n",
1250 kvno, enctype, name));
1251 TALLOC_FREE(name);
1252 }
1253 }
1254
1255 ret = krb5_kt_get_entry(context,
1256 keytab,
1257 server,
1258 kvno,
1259 enctype,
1260 &entry);
1261
1262 if (ret) {
1263 DEBUG(0,("get_key_from_keytab: failed to retrieve key: %s\n", error_message(ret)));
1264 goto out;
1265 }
1266
1267 keyp = KRB5_KT_KEY(&entry);
1268
1269 ret = krb5_copy_keyblock(context, keyp, out_key);
1270 if (ret) {
1271 DEBUG(0,("get_key_from_keytab: failed to copy key: %s\n", error_message(ret)));
1272 goto out;
1273 }
1274
1275 smb_krb5_kt_free_entry(context, &entry);
1276
1277 out:
1278 krb5_kt_close(context, keytab);
1279 return ret;
1280 }
1281
1282 /* Prototypes */
1283
1284 krb5_error_code smb_krb5_get_keyinfo_from_ap_req(krb5_context context,
1285 const krb5_data *inbuf,
1286 krb5_kvno *kvno,
1287 krb5_enctype *enctype)
1288 {
1289 #ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
1290 {
1291 krb5_error_code ret;
1292 krb5_ap_req ap_req;
1293
1294 ret = krb5_decode_ap_req(context, inbuf, &ap_req);
1295 if (ret)
1296 return ret;
1297
1298 *kvno = get_kvno_from_ap_req(&ap_req);
1299 *enctype = get_enctype_from_ap_req(&ap_req);
1300
1301 free_AP_REQ(&ap_req);
1302 return 0;
1303 }
1304 #endif
1305
1306 /* Possibly not an appropriate error code. */
1307 return KRB5KDC_ERR_BADOPTION;
1308 }
1309
1310 krb5_error_code krb5_rd_req_return_keyblock_from_keytab(krb5_context context,
1311 krb5_auth_context *auth_context,
1312 const krb5_data *inbuf,
1313 krb5_const_principal server,
1314 krb5_keytab keytab,
1315 krb5_flags *ap_req_options,
1316 krb5_ticket **ticket,
1317 krb5_keyblock **keyblock)
1318 {
1319 krb5_error_code ret;
1320 krb5_kvno kvno;
1321 krb5_enctype enctype;
1322 krb5_keyblock *local_keyblock;
1323
1324 ret = krb5_rd_req(context,
1325 auth_context,
1326 inbuf,
1327 server,
1328 keytab,
1329 ap_req_options,
1330 ticket);
1331 if (ret) {
1332 return ret;
1333 }
1334
1335 #ifdef KRB5_TICKET_HAS_KEYINFO
1336 enctype = (*ticket)->enc_part.enctype;
1337 kvno = (*ticket)->enc_part.kvno;
1338 #else
1339 ret = smb_krb5_get_keyinfo_from_ap_req(context, inbuf, &kvno, &enctype);
1340 if (ret) {
1341 return ret;
1342 }
1343 #endif
1344
1345 ret = get_key_from_keytab(context,
1346 server,
1347 enctype,
1348 kvno,
1349 &local_keyblock);
1350 if (ret) {
1351 DEBUG(0,("krb5_rd_req_return_keyblock_from_keytab: failed to call get_key_from_keytab\n"));
1352 goto out;
1353 }
1354
1355 out:
1356 if (ret && local_keyblock != NULL) {
1357 krb5_free_keyblock(context, local_keyblock);
1358 } else {
1359 *keyblock = local_keyblock;
1360 }
1361
1362 return ret;
1363 }
1364
1365 krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
1366 const char *name,
1367 krb5_principal *principal)
1368 {
1369 #ifdef HAVE_KRB5_PARSE_NAME_NOREALM
1370 return smb_krb5_parse_name_norealm_conv(context, name, principal);
1371 #endif
1372
1373 /* we are cheating here because parse_name will in fact set the realm.
1374 * We don't care as the only caller of smb_krb5_parse_name_norealm
1375 * ignores the realm anyway when calling
1376 * smb_krb5_principal_compare_any_realm later - Guenther */
1377
1378 return smb_krb5_parse_name(context, name, principal);
1379 }
1380
1381 bool smb_krb5_principal_compare_any_realm(krb5_context context,
1382 krb5_const_principal princ1,
1383 krb5_const_principal princ2)
1384 {
1385 #ifdef HAVE_KRB5_PRINCIPAL_COMPARE_ANY_REALM
1386
1387 return krb5_principal_compare_any_realm(context, princ1, princ2);
1388
1389 /* krb5_princ_size is a macro in MIT */
1390 #elif defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
1391
1392 int i, len1, len2;
1393 const krb5_data *p1, *p2;
1394
1395 len1 = krb5_princ_size(context, princ1);
1396 len2 = krb5_princ_size(context, princ2);
1397
1398 if (len1 != len2)
1399 return False;
1400
1401 for (i = 0; i < len1; i++) {
1402
1403 p1 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ1), i);
1404 p2 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ2), i);
1405
1406 if (p1->length != p2->length || memcmp(p1->data, p2->data, p1->length))
1407 return False;
1408 }
1409
1410 return True;
1411 #else
1412 #error NO_SUITABLE_PRINCIPAL_COMPARE_FUNCTION
1413 #endif
1414 }
1415
1416 krb5_error_code smb_krb5_renew_ticket(const char *ccache_string, /* FILE:/tmp/krb5cc_0 */
1417 const char *client_string, /* gd@BER.SUSE.DE */
1418 const char *service_string, /* krbtgt/BER.SUSE.DE@BER.SUSE.DE */
1419 time_t *expire_time)
1420 {
1421 krb5_error_code ret;
1422 krb5_context context = NULL;
1423 krb5_ccache ccache = NULL;
1424 krb5_principal client = NULL;
1425 krb5_creds creds, creds_in, *creds_out = NULL;
1426
1427 ZERO_STRUCT(creds);
1428 ZERO_STRUCT(creds_in);
1429
1430 initialize_krb5_error_table();
1431 ret = krb5_init_context(&context);
1432 if (ret) {
1433 goto done;
1434 }
1435
1436 if (!ccache_string) {
1437 ccache_string = krb5_cc_default_name(context);
1438 }
1439
1440 if (!ccache_string) {
1441 ret = EINVAL;
1442 goto done;
1443 }
1444
1445 DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_string));
1446
1447 /* FIXME: we should not fall back to defaults */
1448 ret = krb5_cc_resolve(context, CONST_DISCARD(char *, ccache_string), &ccache);
1449 if (ret) {
1450 goto done;
1451 }
1452
1453 if (client_string) {
1454 ret = smb_krb5_parse_name(context, client_string, &client);
1455 if (ret) {
1456 goto done;
1457 }
1458 } else {
1459 ret = krb5_cc_get_principal(context, ccache, &client);
1460 if (ret) {
1461 goto done;
1462 }
1463 }
1464
1465 #ifdef HAVE_KRB5_GET_RENEWED_CREDS /* MIT */
1466 {
1467 ret = krb5_get_renewed_creds(context, &creds, client, ccache, CONST_DISCARD(char *, service_string));
1468 if (ret) {
1469 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1470 goto done;
1471 }
1472 }
1473 #elif defined(HAVE_KRB5_GET_KDC_CRED) /* Heimdal */
1474 {
1475 krb5_kdc_flags flags;
1476 krb5_realm *client_realm = NULL;
1477
1478 ret = krb5_copy_principal(context, client, &creds_in.client);
1479 if (ret) {
1480 goto done;
1481 }
1482
1483 if (service_string) {
1484 ret = smb_krb5_parse_name(context, service_string, &creds_in.server);
1485 if (ret) {
1486 goto done;
1487 }
1488 } else {
1489 /* build tgt service by default */
1490 client_realm = krb5_princ_realm(context, creds_in.client);
1491 if (!client_realm) {
1492 ret = ENOMEM;
1493 goto done;
1494 }
1495 ret = krb5_make_principal(context, &creds_in.server, *client_realm, KRB5_TGS_NAME, *client_realm, NULL);
1496 if (ret) {
1497 goto done;
1498 }
1499 }
1500
1501 flags.i = 0;
1502 flags.b.renewable = flags.b.renew = True;
1503
1504 ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &creds_in, &creds_out);
1505 if (ret) {
1506 DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
1507 goto done;
1508 }
1509
1510 creds = *creds_out;
1511 }
1512 #else
1513 #error NO_SUITABLE_KRB5_TICKET_RENEW_FUNCTION_AVAILABLE
1514 #endif
1515
1516 /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
1517 ret = krb5_cc_initialize(context, ccache, client);
1518 if (ret) {
1519 goto done;
1520 }
1521
1522 ret = krb5_cc_store_cred(context, ccache, &creds);
1523
1524 if (expire_time) {
1525 *expire_time = (time_t) creds.times.endtime;
1526 }
1527
1528 done:
1529 krb5_free_cred_contents(context, &creds_in);
1530
1531 if (creds_out) {
1532 krb5_free_creds(context, creds_out);
1533 } else {
1534 krb5_free_cred_contents(context, &creds);
1535 }
1536
1537 if (client) {
1538 krb5_free_principal(context, client);
1539 }
1540 if (ccache) {
1541 krb5_cc_close(context, ccache);
1542 }
1543 if (context) {
1544 krb5_free_context(context);
1545 }
1546
1547 return ret;
1548 }
1549
1550 krb5_error_code smb_krb5_free_addresses(krb5_context context, smb_krb5_addresses *addr)
1551 {
1552 krb5_error_code ret = 0;
1553 if (addr == NULL) {
1554 return ret;
1555 }
1556 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1557 krb5_free_addresses(context, addr->addrs);
1558 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1559 ret = krb5_free_addresses(context, addr->addrs);
1560 SAFE_FREE(addr->addrs);
1561 #endif
1562 SAFE_FREE(addr);
1563 addr = NULL;
1564 return ret;
1565 }
1566
1567 krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr)
1568 {
1569 krb5_error_code ret = 0;
1570 nstring buf;
1571 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1572 krb5_address **addrs = NULL;
1573 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1574 krb5_addresses *addrs = NULL;
1575 #endif
1576
1577 *kerb_addr = (smb_krb5_addresses *)SMB_MALLOC(sizeof(smb_krb5_addresses));
1578 if (*kerb_addr == NULL) {
1579 return ENOMEM;
1580 }
1581
1582 put_name(buf, global_myname(), ' ', 0x20);
1583
1584 #if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
1585 {
1586 int num_addr = 2;
1587
1588 addrs = (krb5_address **)SMB_MALLOC(sizeof(krb5_address *) * num_addr);
1589 if (addrs == NULL) {
1590 SAFE_FREE(*kerb_addr);
1591 return ENOMEM;
1592 }
1593
1594 memset(addrs, 0, sizeof(krb5_address *) * num_addr);
1595
1596 addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1597 if (addrs[0] == NULL) {
1598 SAFE_FREE(addrs);
1599 SAFE_FREE(*kerb_addr);
1600 return ENOMEM;
1601 }
1602
1603 addrs[0]->magic = KV5M_ADDRESS;
1604 addrs[0]->addrtype = KRB5_ADDR_NETBIOS;
1605 addrs[0]->length = MAX_NETBIOSNAME_LEN;
1606 addrs[0]->contents = (unsigned char *)SMB_MALLOC(addrs[0]->length);
1607 if (addrs[0]->contents == NULL) {
1608 SAFE_FREE(addrs[0]);
1609 SAFE_FREE(addrs);
1610 SAFE_FREE(*kerb_addr);
1611 return ENOMEM;
1612 }
1613
1614 memcpy(addrs[0]->contents, buf, addrs[0]->length);
1615
1616 addrs[1] = NULL;
1617 }
1618 #elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
1619 {
1620 addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
1621 if (addrs == NULL) {
1622 SAFE_FREE(*kerb_addr);
1623 return ENOMEM;
1624 }
1625
1626 memset(addrs, 0, sizeof(krb5_addresses));
1627
1628 addrs->len = 1;
1629 addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
1630 if (addrs->val == NULL) {
1631 SAFE_FREE(addrs);
1632 SAFE_FREE(kerb_addr);
1633 return ENOMEM;
1634 }
1635
1636 addrs->val[0].addr_type = KRB5_ADDR_NETBIOS;
1637 addrs->val[0].address.length = MAX_NETBIOSNAME_LEN;
1638 addrs->val[0].address.data = (unsigned char *)SMB_MALLOC(addrs->val[0].address.length);
1639 if (addrs->val[0].address.data == NULL) {
1640 SAFE_FREE(addrs->val);
1641 SAFE_FREE(addrs);
1642 SAFE_FREE(*kerb_addr);
1643 return ENOMEM;
1644 }
1645
1646 memcpy(addrs->val[0].address.data, buf, addrs->val[0].address.length);
1647 }
1648 #else
1649 #error UNKNOWN_KRB5_ADDRESS_FORMAT
1650 #endif
1651 (*kerb_addr)->addrs = addrs;
1652
1653 return ret;
1654 }
1655
1656 void smb_krb5_free_error(krb5_context context, krb5_error *krberror)
1657 {
1658 #ifdef HAVE_KRB5_FREE_ERROR_CONTENTS /* Heimdal */
1659 krb5_free_error_contents(context, krberror);
1660 #else /* MIT */
1661 krb5_free_error(context, krberror);
1662 #endif
1663 }
1664
1665 krb5_error_code handle_krberror_packet(krb5_context context,
1666 krb5_data *packet)
1667 {
1668 krb5_error_code ret;
1669 bool got_error_code = False;
1670
1671 DEBUG(10,("handle_krberror_packet: got error packet\n"));
1672
1673 #ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
1674 {
1675 krb5_error krberror;
1676
1677 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1678 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1679 error_message(ret)));
1680 return ret;
1681 }
1682
1683 if (krberror.e_data == NULL || krberror.e_data->data == NULL) {
1684 ret = (krb5_error_code) krberror.error_code;
1685 got_error_code = True;
1686 }
1687
1688 smb_krb5_free_error(context, &krberror);
1689 }
1690 #else /* MIT */
1691 {
1692 krb5_error *krberror;
1693
1694 if ((ret = krb5_rd_error(context, packet, &krberror))) {
1695 DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
1696 error_message(ret)));
1697 return ret;
1698 }
1699
1700 if (krberror->e_data.data == NULL) {
1701 #if defined(ERROR_TABLE_BASE_krb5)
1702 ret = ERROR_TABLE_BASE_krb5 + (krb5_error_code) krberror->error;
1703 #else
1704 ret = (krb5_error_code)krberror->error;
1705 #endif
1706 got_error_code = True;
1707 }
1708 smb_krb5_free_error(context, krberror);
1709 }
1710 #endif
1711 if (got_error_code) {
1712 DEBUG(5,("handle_krberror_packet: got KERBERR from kpasswd: %s (%d)\n",
1713 error_message(ret), ret));
1714 }
1715 return ret;
1716 }
1717
1718 krb5_error_code smb_krb5_get_init_creds_opt_alloc(krb5_context context,
1719 krb5_get_init_creds_opt **opt)
1720 {
1721 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC
1722 /* Heimdal or modern MIT version */
1723 return krb5_get_init_creds_opt_alloc(context, opt);
1724 #else
1725 /* Historical MIT version */
1726 krb5_get_init_creds_opt *my_opt;
1727
1728 *opt = NULL;
1729
1730 if ((my_opt = SMB_MALLOC_P(krb5_get_init_creds_opt)) == NULL) {
1731 return ENOMEM;
1732 }
1733
1734 krb5_get_init_creds_opt_init(my_opt);
1735
1736 *opt = my_opt;
1737 return 0;
1738 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC */
1739 }
1740
1741 void smb_krb5_get_init_creds_opt_free(krb5_context context,
1742 krb5_get_init_creds_opt *opt)
1743 {
1744 #ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_FREE
1745
1746 #ifdef KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT
1747 /* Modern MIT or Heimdal version */
1748 krb5_get_init_creds_opt_free(context, opt);
1749 #else
1750 /* Heimdal version */
1751 krb5_get_init_creds_opt_free(opt);
1752 #endif /* KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT */
1753
1754 #else /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1755 /* Historical MIT version */
1756 SAFE_FREE(opt);
1757 opt = NULL;
1758 #endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */
1759 }
1760
1761 krb5_enctype smb_get_enctype_from_kt_entry(krb5_keytab_entry *kt_entry)
1762 {
1763 return KRB5_KEY_TYPE(KRB5_KT_KEY(kt_entry));
1764 }
1765
1766
1767 /* caller needs to free etype_s */
1768 krb5_error_code smb_krb5_enctype_to_string(krb5_context context,
1769 krb5_enctype enctype,
1770 char **etype_s)
1771 {
1772 #ifdef HAVE_KRB5_ENCTYPE_TO_STRING_WITH_KRB5_CONTEXT_ARG
1773 return krb5_enctype_to_string(context, enctype, etype_s); /* Heimdal */
1774 #elif defined(HAVE_KRB5_ENCTYPE_TO_STRING_WITH_SIZE_T_ARG)
1775 char buf[256];
1776 krb5_error_code ret = krb5_enctype_to_string(enctype, buf, 256); /* MIT */
1777 if (ret) {
1778 return ret;
1779 }
1780 *etype_s = SMB_STRDUP(buf);
1781 if (!*etype_s) {
1782 return ENOMEM;
1783 }
1784 return ret;
1785 #else
1786 #error UNKNOWN_KRB5_ENCTYPE_TO_STRING_FUNCTION
1787 #endif
1788 }
1789
1790 krb5_error_code smb_krb5_mk_error(krb5_context context,
1791 krb5_error_code error_code,
1792 const krb5_principal server,
1793 krb5_data *reply)
1794 {
1795 #ifdef HAVE_SHORT_KRB5_MK_ERROR_INTERFACE /* MIT */
1796 /*
1797 * The MIT interface is *terrible*.
1798 * We have to construct this ourselves...
1799 */
1800 krb5_error e;
1801
1802 memset(&e, 0, sizeof(e));
1803 krb5_us_timeofday(context, &e.stime, &e.susec);
1804 e.server = server;
1805 #if defined(krb5_err_base)
1806 e.error = error_code - krb5_err_base;
1807 #elif defined(ERROR_TABLE_BASE_krb5)
1808 e.error = error_code - ERROR_TABLE_BASE_krb5;
1809 #else
1810 e.error = error_code; /* Almost certainly wrong, but what can we do... ? */
1811 #endif
1812
1813 return krb5_mk_error(context, &e, reply);
1814 #else /* Heimdal. */
1815 return krb5_mk_error(context,
1816 error_code,
1817 NULL,
1818 NULL, /* e_data */
1819 NULL,
1820 server,
1821 NULL,
1822 NULL,
1823 reply);
1824 #endif
1825 }
1826
1827 /**********************************************************************
1828 * Open a krb5 keytab with flags, handles readonly or readwrite access and
1829 * allows to process non-default keytab names.
1830 * @param context krb5_context
1831 * @param keytab_name_req string
1832 * @param write_access bool if writable keytab is required
1833 * @param krb5_keytab pointer to krb5_keytab (close with krb5_kt_close())
1834 * @return krb5_error_code
1835 **********************************************************************/
1836
1837 /* This MAX_NAME_LEN is a constant defined in krb5.h */
1838 #ifndef MAX_KEYTAB_NAME_LEN
1839 #define MAX_KEYTAB_NAME_LEN 1100
1840 #endif
1841
1842 krb5_error_code smb_krb5_open_keytab(krb5_context context,
1843 const char *keytab_name_req,
1844 bool write_access,
1845 krb5_keytab *keytab)
1846 {
1847 krb5_error_code ret = 0;
1848 TALLOC_CTX *mem_ctx;
1849 char keytab_string[MAX_KEYTAB_NAME_LEN];
1850 char *kt_str = NULL;
1851 bool found_valid_name = False;
1852 const char *pragma = "FILE";
1853 const char *tmp = NULL;
1854
1855 if (!write_access && !keytab_name_req) {
1856 /* caller just wants to read the default keytab readonly, so be it */
1857 return krb5_kt_default(context, keytab);
1858 }
1859
1860 mem_ctx = talloc_init("smb_krb5_open_keytab");
1861 if (!mem_ctx) {
1862 return ENOMEM;
1863 }
1864
1865 #ifdef HAVE_WRFILE_KEYTAB
1866 if (write_access) {
1867 pragma = "WRFILE";
1868 }
1869 #endif
1870
1871 if (keytab_name_req) {
1872
1873 if (strlen(keytab_name_req) > MAX_KEYTAB_NAME_LEN) {
1874 ret = KRB5_CONFIG_NOTENUFSPACE;
1875 goto out;
1876 }
1877
1878 if ((strncmp(keytab_name_req, "WRFILE:/", 8) == 0) ||
1879 (strncmp(keytab_name_req, "FILE:/", 6) == 0)) {
1880 tmp = keytab_name_req;
1881 goto resolve;
1882 }
1883
1884 if (keytab_name_req[0] != '/') {
1885 ret = KRB5_KT_BADNAME;
1886 goto out;
1887 }
1888
1889 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, keytab_name_req);
1890 if (!tmp) {
1891 ret = ENOMEM;
1892 goto out;
1893 }
1894
1895 goto resolve;
1896 }
1897
1898 /* we need to handle more complex keytab_strings, like:
1899 * "ANY:FILE:/etc/krb5.keytab,krb4:/etc/srvtab" */
1900
1901 ret = krb5_kt_default_name(context, &keytab_string[0], MAX_KEYTAB_NAME_LEN - 2);
1902 if (ret) {
1903 goto out;
1904 }
1905
1906 DEBUG(10,("smb_krb5_open_keytab: krb5_kt_default_name returned %s\n", keytab_string));
1907
1908 tmp = talloc_strdup(mem_ctx, keytab_string);
1909 if (!tmp) {
1910 ret = ENOMEM;
1911 goto out;
1912 }
1913
1914 if (strncmp(tmp, "ANY:", 4) == 0) {
1915 tmp += 4;
1916 }
1917
1918 memset(&keytab_string, '\0', sizeof(keytab_string));
1919
1920 while (next_token_talloc(mem_ctx, &tmp, &kt_str, ",")) {
1921 if (strncmp(kt_str, "WRFILE:", 7) == 0) {
1922 found_valid_name = True;
1923 tmp = kt_str;
1924 tmp += 7;
1925 }
1926
1927 if (strncmp(kt_str, "FILE:", 5) == 0) {
1928 found_valid_name = True;
1929 tmp = kt_str;
1930 tmp += 5;
1931 }
1932
1933 if (tmp[0] == '/') {
1934 /* Treat as a FILE: keytab definition. */
1935 found_valid_name = true;
1936 }
1937
1938 if (found_valid_name) {
1939 if (tmp[0] != '/') {
1940 ret = KRB5_KT_BADNAME;
1941 goto out;
1942 }
1943
1944 tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, tmp);
1945 if (!tmp) {
1946 ret = ENOMEM;
1947 goto out;
1948 }
1949 break;
1950 }
1951 }
1952
1953 if (!found_valid_name) {
1954 ret = KRB5_KT_UNKNOWN_TYPE;
1955 goto out;
1956 }
1957
1958 resolve:
1959 DEBUG(10,("smb_krb5_open_keytab: resolving: %s\n", tmp));
1960 ret = krb5_kt_resolve(context, tmp, keytab);
1961
1962 out:
1963 TALLOC_FREE(mem_ctx);
1964 return ret;
1965 }
1966
1967 krb5_error_code smb_krb5_keytab_name(TALLOC_CTX *mem_ctx,
1968 krb5_context context,
1969 krb5_keytab keytab,
1970 const char **keytab_name)
1971 {
1972 char keytab_string[MAX_KEYTAB_NAME_LEN];
1973 krb5_error_code ret = 0;
1974
1975 ret = krb5_kt_get_name(context, keytab,
1976 keytab_string, MAX_KEYTAB_NAME_LEN - 2);
1977 if (ret) {
1978 return ret;
1979 }
1980
1981 *keytab_name = talloc_strdup(mem_ctx, keytab_string);
1982 if (!*keytab_name) {
1983 return ENOMEM;
1984 }
1985
1986 return ret;
1987 }
1988
1989 #if defined(HAVE_KRB5_GET_CREDS_OPT_SET_IMPERSONATE) && \
1990 defined(HAVE_KRB5_GET_CREDS_OPT_ALLOC) && \
1991 defined(HAVE_KRB5_GET_CREDS)
1992 static krb5_error_code smb_krb5_get_credentials_for_user_opt(krb5_context context,
1993 krb5_ccache ccache,
1994 krb5_principal me,
1995 krb5_principal server,
1996 krb5_principal impersonate_princ,
1997 krb5_creds **out_creds)
1998 {
1999 krb5_error_code ret;
2000 krb5_get_creds_opt opt;
2001
2002 ret = krb5_get_creds_opt_alloc(context, &opt);
2003 if (ret) {
2004 goto done;
2005 }
2006 krb5_get_creds_opt_add_options(context, opt, KRB5_GC_FORWARDABLE);
2007
2008 if (impersonate_princ) {
2009 ret = krb5_get_creds_opt_set_impersonate(context, opt,
2010 impersonate_princ);
2011 if (ret) {
2012 goto done;
2013 }
2014 }
2015
2016 ret = krb5_get_creds(context, opt, ccache, server, out_creds);
2017 if (ret) {
2018 goto done;
2019 }
2020
2021 done:
2022 if (opt) {
2023 krb5_get_creds_opt_free(context, opt);
2024 }
2025 return ret;
2026 }
2027 #endif /* HAVE_KRB5_GET_CREDS_OPT_SET_IMPERSONATE */
2028
2029 #ifdef HAVE_KRB5_GET_CREDENTIALS_FOR_USER
2030 static krb5_error_code smb_krb5_get_credentials_for_user(krb5_context context,
2031 krb5_ccache ccache,
2032 krb5_principal me,
2033 krb5_principal server,
2034 krb5_principal impersonate_princ,
2035 krb5_creds **out_creds)
2036 {
2037 krb5_error_code ret;
2038 krb5_creds in_creds;
2039
2040 #if !HAVE_DECL_KRB5_GET_CREDENTIALS_FOR_USER
2041 krb5_error_code KRB5_CALLCONV
2042 krb5_get_credentials_for_user(krb5_context context, krb5_flags options,
2043 krb5_ccache ccache, krb5_creds *in_creds,
2044 krb5_data *subject_cert,
2045 krb5_creds **out_creds);
2046 #endif /* !HAVE_DECL_KRB5_GET_CREDENTIALS_FOR_USER */
2047
2048 ZERO_STRUCT(in_creds);
2049
2050 if (impersonate_princ) {
2051
2052 in_creds.server = me;
2053 in_creds.client = impersonate_princ;
2054
2055 ret = krb5_get_credentials_for_user(context,
2056 0, /* krb5_flags options */
2057 ccache,
2058 &in_creds,
2059 NULL, /* krb5_data *subject_cert */
2060 out_creds);
2061 } else {
2062 in_creds.client = me;
2063 in_creds.server = server;
2064
2065 ret = krb5_get_credentials(context, 0, ccache,
2066 &in_creds, out_creds);
2067 }
2068
2069 return ret;
2070 }
2071 #endif /* HAVE_KRB5_GET_CREDENTIALS_FOR_USER */
2072
2073 /*
2074 * smb_krb5_get_credentials
2075 *
2076 * @brief Get krb5 credentials for a server
2077 *
2078 * @param[in] context An initialized krb5_context
2079 * @param[in] ccache An initialized krb5_ccache
2080 * @param[in] me The krb5_principal of the caller
2081 * @param[in] server The krb5_principal of the requested service
2082 * @param[in] impersonate_princ The krb5_principal of a user to impersonate as (optional)
2083 * @param[out] out_creds The returned krb5_creds structure
2084 * @return krb5_error_code
2085 *
2086 */
2087 krb5_error_code smb_krb5_get_credentials(krb5_context context,
2088 krb5_ccache ccache,
2089 krb5_principal me,
2090 krb5_principal server,
2091 krb5_principal impersonate_princ,
2092 krb5_creds **out_creds)
2093 {
2094 krb5_error_code ret;
2095 krb5_creds *creds = NULL;
2096
2097 *out_creds = NULL;
2098
2099 if (impersonate_princ) {
2100 #ifdef HAVE_KRB5_GET_CREDS_OPT_SET_IMPERSONATE /* Heimdal */
2101 ret = smb_krb5_get_credentials_for_user_opt(context, ccache, me, server, impersonate_princ, &creds);
2102 #elif defined(HAVE_KRB5_GET_CREDENTIALS_FOR_USER) /* MIT */
2103 ret = smb_krb5_get_credentials_for_user(context, ccache, me, server, impersonate_princ, &creds);
2104 #else
2105 ret = ENOTSUP;
2106 #endif
2107 } else {
2108 krb5_creds in_creds;
2109
2110 ZERO_STRUCT(in_creds);
2111
2112 in_creds.client = me;
2113 in_creds.server = server;
2114
2115 ret = krb5_get_credentials(context, 0, ccache,
2116 &in_creds, &creds);
2117 }
2118 if (ret) {
2119 goto done;
2120 }
2121
2122 ret = krb5_cc_store_cred(context, ccache, creds);
2123 if (ret) {
2124 goto done;
2125 }
2126
2127 if (out_creds) {
2128 *out_creds = creds;
2129 }
2130
2131 done:
2132 if (creds && ret) {
2133 krb5_free_creds(context, creds);
2134 }
2135
2136 return ret;
2137 }
2138
2139 /*
2140 * smb_krb5_get_creds
2141 *
2142 * @brief Get krb5 credentials for a server
2143 *
2144 * @param[in] server_s The string name of the service
2145 * @param[in] time_offset The offset to the KDCs time in seconds (optional)
2146 * @param[in] cc The krb5 credential cache string name (optional)
2147 * @param[in] impersonate_princ_s The string principal name to impersonate (optional)
2148 * @param[out] creds_p The returned krb5_creds structure
2149 * @return krb5_error_code
2150 *
2151 */
2152 krb5_error_code smb_krb5_get_creds(const char *server_s,
2153 time_t time_offset,
2154 const char *cc,
2155 const char *impersonate_princ_s,
2156 krb5_creds **creds_p)
2157 {
2158 krb5_error_code ret;
2159 krb5_context context = NULL;
2160 krb5_principal me = NULL;
2161 krb5_principal server = NULL;
2162 krb5_principal impersonate_princ = NULL;
2163 krb5_creds *creds = NULL;
2164 krb5_ccache ccache = NULL;
2165
2166 *creds_p = NULL;
2167
2168 initialize_krb5_error_table();
2169 ret = krb5_init_context(&context);
2170 if (ret) {
2171 goto done;
2172 }
2173
2174 if (time_offset != 0) {
2175 krb5_set_real_time(context, time(NULL) + time_offset, 0);
2176 }
2177
2178 ret = krb5_cc_resolve(context, cc ? cc :
2179 krb5_cc_default_name(context), &ccache);
2180 if (ret) {
2181 goto done;
2182 }
2183
2184 ret = krb5_cc_get_principal(context, ccache, &me);
2185 if (ret) {
2186 goto done;
2187 }
2188
2189 ret = smb_krb5_parse_name(context, server_s, &server);
2190 if (ret) {
2191 goto done;
2192 }
2193
2194 if (impersonate_princ_s) {
2195 ret = smb_krb5_parse_name(context, impersonate_princ_s,
2196 &impersonate_princ);
2197 if (ret) {
2198 goto done;
2199 }
2200 }
2201
2202 ret = smb_krb5_get_credentials(context, ccache,
2203 me, server, impersonate_princ,
2204 &creds);
2205 if (ret) {
2206 goto done;
2207 }
2208
2209 ret = krb5_cc_store_cred(context, ccache, creds);
2210 if (ret) {
2211 goto done;
2212 }
2213
2214 if (creds_p) {
2215 *creds_p = creds;
2216 }
2217
2218 DEBUG(1,("smb_krb5_get_creds: got ticket for %s\n",
2219 server_s));
2220
2221 if (impersonate_princ_s) {
2222 char *client = NULL;
2223
2224 ret = smb_krb5_unparse_name(talloc_tos(), context, creds->client, &client);
2225 if (ret) {
2226 goto done;
2227 }
2228 DEBUGADD(1,("smb_krb5_get_creds: using S4U2SELF impersonation as %s\n",
2229 client));
2230 TALLOC_FREE(client);
2231 }
2232
2233 done:
2234 if (!context) {
2235 return ret;
2236 }
2237
2238 if (creds && ret) {
2239 krb5_free_creds(context, creds);
2240 }
2241 if (server) {
2242 krb5_free_principal(context, server);
2243 }
2244 if (me) {
2245 krb5_free_principal(context, me);
2246 }
2247 if (impersonate_princ) {
2248 krb5_free_principal(context, impersonate_princ);
2249 }
2250 if (ccache) {
2251 krb5_cc_close(context, ccache);
2252 }
2253 krb5_free_context(context);
2254
2255 return ret;
2256 }
2257
2258 /*
2259 * smb_krb5_principal_get_realm
2260 *
2261 * @brief Get realm of a principal
2262 *
2263 * @param[in] context The krb5_context
2264 * @param[in] principal The principal
2265 * @return pointer to the realm
2266 *
2267 */
2268
2269 char *smb_krb5_principal_get_realm(krb5_context context,
2270 krb5_principal principal)
2271 {
2272 #ifdef HAVE_KRB5_PRINCIPAL_GET_REALM /* Heimdal */
2273 return krb5_principal_get_realm(context, principal);
2274 #elif defined(krb5_princ_realm) /* MIT */
2275 krb5_data *realm;
2276 realm = krb5_princ_realm(context, principal);
2277 return (char *)realm->data;
2278 #else
2279 return NULL;
2280 #endif
2281 }
2282
2283 #else /* HAVE_KRB5 */
2284 /* this saves a few linking headaches */
2285 int cli_krb5_get_ticket(TALLOC_CTX *mem_ctx,
2286 const char *principal, time_t time_offset,
2287 DATA_BLOB *ticket, DATA_BLOB *session_key_krb5,
2288 uint32_t extra_ap_opts,
2289 const char *ccname, time_t *tgs_expire,
2290 const char *impersonate_princ_s)
2291 {
2292 DEBUG(0,("NO KERBEROS SUPPORT\n"));
2293 return 1;
2294 }
2295
2296 #endif
WIP