source: heimdal/trunk/lib/krb5/get_cred.c

Last change on this file was 1, checked in by Paul Smedley, 10 years ago

Initial commit of Heimdal 1.5.3
File size: 39.1 KB
Line 
1/*
2 * Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include "krb5_locl.h"
37#include <assert.h>
38
39static krb5_error_code
40get_cred_kdc_capath(krb5_context, krb5_kdc_flags,
41 krb5_ccache, krb5_creds *, krb5_principal,
42 Ticket *, krb5_creds **, krb5_creds ***);
43
44/*
45 * Take the `body' and encode it into `padata' using the credentials
46 * in `creds'.
47 */
48
49static krb5_error_code
50make_pa_tgs_req(krb5_context context,
51 krb5_auth_context ac,
52 KDC_REQ_BODY *body,
53 PA_DATA *padata,
54 krb5_creds *creds)
55{
56 u_char *buf;
57 size_t buf_size;
58 size_t len = 0;
59 krb5_data in_data;
60 krb5_error_code ret;
61
62 ASN1_MALLOC_ENCODE(KDC_REQ_BODY, buf, buf_size, body, &len, ret);
63 if (ret)
64 goto out;
65 if(buf_size != len)
66 krb5_abortx(context, "internal error in ASN.1 encoder");
67
68 in_data.length = len;
69 in_data.data = buf;
70 ret = _krb5_mk_req_internal(context, &ac, 0, &in_data, creds,
71 &padata->padata_value,
72 KRB5_KU_TGS_REQ_AUTH_CKSUM,
73 KRB5_KU_TGS_REQ_AUTH);
74 out:
75 free (buf);
76 if(ret)
77 return ret;
78 padata->padata_type = KRB5_PADATA_TGS_REQ;
79 return 0;
80}
81
82/*
83 * Set the `enc-authorization-data' in `req_body' based on `authdata'
84 */
85
86static krb5_error_code
87set_auth_data (krb5_context context,
88 KDC_REQ_BODY *req_body,
89 krb5_authdata *authdata,
90 krb5_keyblock *subkey)
91{
92 if(authdata->len) {
93 size_t len = 0, buf_size;
94 unsigned char *buf;
95 krb5_crypto crypto;
96 krb5_error_code ret;
97
98 ASN1_MALLOC_ENCODE(AuthorizationData, buf, buf_size, authdata,
99 &len, ret);
100 if (ret)
101 return ret;
102 if (buf_size != len)
103 krb5_abortx(context, "internal error in ASN.1 encoder");
104
105 ALLOC(req_body->enc_authorization_data, 1);
106 if (req_body->enc_authorization_data == NULL) {
107 free (buf);
108 krb5_set_error_message(context, ENOMEM,
109 N_("malloc: out of memory", ""));
110 return ENOMEM;
111 }
112 ret = krb5_crypto_init(context, subkey, 0, &crypto);
113 if (ret) {
114 free (buf);
115 free (req_body->enc_authorization_data);
116 req_body->enc_authorization_data = NULL;
117 return ret;
118 }
119 krb5_encrypt_EncryptedData(context,
120 crypto,
121 KRB5_KU_TGS_REQ_AUTH_DAT_SUBKEY,
122 buf,
123 len,
124 0,
125 req_body->enc_authorization_data);
126 free (buf);
127 krb5_crypto_destroy(context, crypto);
128 } else {
129 req_body->enc_authorization_data = NULL;
130 }
131 return 0;
132}
133
134/*
135 * Create a tgs-req in `t' with `addresses', `flags', `second_ticket'
136 * (if not-NULL), `in_creds', `krbtgt', and returning the generated
137 * subkey in `subkey'.
138 */
139
140static krb5_error_code
141init_tgs_req (krb5_context context,
142 krb5_ccache ccache,
143 krb5_addresses *addresses,
144 krb5_kdc_flags flags,
145 Ticket *second_ticket,
146 krb5_creds *in_creds,
147 krb5_creds *krbtgt,
148 unsigned nonce,
149 const METHOD_DATA *padata,
150 krb5_keyblock **subkey,
151 TGS_REQ *t)
152{
153 krb5_auth_context ac = NULL;
154 krb5_error_code ret = 0;
155
156 memset(t, 0, sizeof(*t));
157 t->pvno = 5;
158 t->msg_type = krb_tgs_req;
159 if (in_creds->session.keytype) {
160 ALLOC_SEQ(&t->req_body.etype, 1);
161 if(t->req_body.etype.val == NULL) {
162 ret = ENOMEM;
163 krb5_set_error_message(context, ret,
164 N_("malloc: out of memory", ""));
165 goto fail;
166 }
167 t->req_body.etype.val[0] = in_creds->session.keytype;
168 } else {
169 ret = _krb5_init_etype(context,
170 KRB5_PDU_TGS_REQUEST,
171 &t->req_body.etype.len,
172 &t->req_body.etype.val,
173 NULL);
174 }
175 if (ret)
176 goto fail;
177 t->req_body.addresses = addresses;
178 t->req_body.kdc_options = flags.b;
179 t->req_body.kdc_options.forwardable = krbtgt->flags.b.forwardable;
180 t->req_body.kdc_options.renewable = krbtgt->flags.b.renewable;
181 t->req_body.kdc_options.proxiable = krbtgt->flags.b.proxiable;
182 ret = copy_Realm(&in_creds->server->realm, &t->req_body.realm);
183 if (ret)
184 goto fail;
185 ALLOC(t->req_body.sname, 1);
186 if (t->req_body.sname == NULL) {
187 ret = ENOMEM;
188 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
189 goto fail;
190 }
191
192 /* some versions of some code might require that the client be
193 present in TGS-REQs, but this is clearly against the spec */
194
195 ret = copy_PrincipalName(&in_creds->server->name, t->req_body.sname);
196 if (ret)
197 goto fail;
198
199 if (krbtgt->times.starttime) {
200 ALLOC(t->req_body.from, 1);
201 if(t->req_body.from == NULL){
202 ret = krb5_enomem(context);
203 goto fail;
204 }
205 *t->req_body.from = in_creds->times.starttime;
206 }
207
208 /* req_body.till should be NULL if there is no endtime specified,
209 but old MIT code (like DCE secd) doesn't like that */
210 ALLOC(t->req_body.till, 1);
211 if(t->req_body.till == NULL){
212 ret = ENOMEM;
213 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
214 goto fail;
215 }
216 *t->req_body.till = in_creds->times.endtime;
217
218 if (t->req_body.kdc_options.renewable && krbtgt->times.renew_till) {
219 ALLOC(t->req_body.rtime, 1);
220 if(t->req_body.rtime == NULL){
221 ret = krb5_enomem(context);
222 goto fail;
223 }
224 *t->req_body.rtime = in_creds->times.renew_till;
225 }
226
227 t->req_body.nonce = nonce;
228 if(second_ticket){
229 ALLOC(t->req_body.additional_tickets, 1);
230 if (t->req_body.additional_tickets == NULL) {
231 ret = ENOMEM;
232 krb5_set_error_message(context, ret,
233 N_("malloc: out of memory", ""));
234 goto fail;
235 }
236 ALLOC_SEQ(t->req_body.additional_tickets, 1);
237 if (t->req_body.additional_tickets->val == NULL) {
238 ret = ENOMEM;
239 krb5_set_error_message(context, ret,
240 N_("malloc: out of memory", ""));
241 goto fail;
242 }
243 ret = copy_Ticket(second_ticket, t->req_body.additional_tickets->val);
244 if (ret)
245 goto fail;
246 }
247 ALLOC(t->padata, 1);
248 if (t->padata == NULL) {
249 ret = ENOMEM;
250 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
251 goto fail;
252 }
253 ALLOC_SEQ(t->padata, 1 + padata->len);
254 if (t->padata->val == NULL) {
255 ret = ENOMEM;
256 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
257 goto fail;
258 }
259 {
260 size_t i;
261 for (i = 0; i < padata->len; i++) {
262 ret = copy_PA_DATA(&padata->val[i], &t->padata->val[i + 1]);
263 if (ret) {
264 krb5_set_error_message(context, ret,
265 N_("malloc: out of memory", ""));
266 goto fail;
267 }
268 }
269 }
270
271 ret = krb5_auth_con_init(context, &ac);
272 if(ret)
273 goto fail;
274
275 ret = krb5_auth_con_generatelocalsubkey(context, ac, &krbtgt->session);
276 if (ret)
277 goto fail;
278
279 ret = set_auth_data (context, &t->req_body, &in_creds->authdata,
280 ac->local_subkey);
281 if (ret)
282 goto fail;
283
284 ret = make_pa_tgs_req(context,
285 ac,
286 &t->req_body,
287 &t->padata->val[0],
288 krbtgt);
289 if(ret)
290 goto fail;
291
292 ret = krb5_auth_con_getlocalsubkey(context, ac, subkey);
293 if (ret)
294 goto fail;
295
296fail:
297 if (ac)
298 krb5_auth_con_free(context, ac);
299 if (ret) {
300 t->req_body.addresses = NULL;
301 free_TGS_REQ (t);
302 }
303 return ret;
304}
305
306krb5_error_code
307_krb5_get_krbtgt(krb5_context context,
308 krb5_ccache id,
309 krb5_realm realm,
310 krb5_creds **cred)
311{
312 krb5_error_code ret;
313 krb5_creds tmp_cred;
314
315 memset(&tmp_cred, 0, sizeof(tmp_cred));
316
317 ret = krb5_cc_get_principal(context, id, &tmp_cred.client);
318 if (ret)
319 return ret;
320
321 ret = krb5_make_principal(context,
322 &tmp_cred.server,
323 realm,
324 KRB5_TGS_NAME,
325 realm,
326 NULL);
327 if(ret) {
328 krb5_free_principal(context, tmp_cred.client);
329 return ret;
330 }
331 ret = krb5_get_credentials(context,
332 KRB5_GC_CACHED,
333 id,
334 &tmp_cred,
335 cred);
336 krb5_free_principal(context, tmp_cred.client);
337 krb5_free_principal(context, tmp_cred.server);
338 if(ret)
339 return ret;
340 return 0;
341}
342
343/* DCE compatible decrypt proc */
344static krb5_error_code KRB5_CALLCONV
345decrypt_tkt_with_subkey (krb5_context context,
346 krb5_keyblock *key,
347 krb5_key_usage usage,
348 krb5_const_pointer skey,
349 krb5_kdc_rep *dec_rep)
350{
351 const krb5_keyblock *subkey = skey;
352 krb5_error_code ret = 0;
353 krb5_data data;
354 size_t size;
355 krb5_crypto crypto;
356
357 assert(usage == 0);
358
359 krb5_data_zero(&data);
360
361 /*
362 * start out with trying with subkey if we have one
363 */
364 if (subkey) {
365 ret = krb5_crypto_init(context, subkey, 0, &crypto);
366 if (ret)
367 return ret;
368 ret = krb5_decrypt_EncryptedData (context,
369 crypto,
370 KRB5_KU_TGS_REP_ENC_PART_SUB_KEY,
371 &dec_rep->kdc_rep.enc_part,
372 &data);
373 /*
374 * If the is Windows 2000 DC, we need to retry with key usage
375 * 8 when doing ARCFOUR.
376 */
377 if (ret && subkey->keytype == ETYPE_ARCFOUR_HMAC_MD5) {
378 ret = krb5_decrypt_EncryptedData(context,
379 crypto,
380 8,
381 &dec_rep->kdc_rep.enc_part,
382 &data);
383 }
384 krb5_crypto_destroy(context, crypto);
385 }
386 if (subkey == NULL || ret) {
387 ret = krb5_crypto_init(context, key, 0, &crypto);
388 if (ret)
389 return ret;
390 ret = krb5_decrypt_EncryptedData (context,
391 crypto,
392 KRB5_KU_TGS_REP_ENC_PART_SESSION,
393 &dec_rep->kdc_rep.enc_part,
394 &data);
395 krb5_crypto_destroy(context, crypto);
396 }
397 if (ret)
398 return ret;
399
400 ret = decode_EncASRepPart(data.data,
401 data.length,
402 &dec_rep->enc_part,
403 &size);
404 if (ret)
405 ret = decode_EncTGSRepPart(data.data,
406 data.length,
407 &dec_rep->enc_part,
408 &size);
409 if (ret)
410 krb5_set_error_message(context, ret,
411 N_("Failed to decode encpart in ticket", ""));
412 krb5_data_free (&data);
413 return ret;
414}
415
416static krb5_error_code
417get_cred_kdc(krb5_context context,
418 krb5_ccache id,
419 krb5_kdc_flags flags,
420 krb5_addresses *addresses,
421 krb5_creds *in_creds,
422 krb5_creds *krbtgt,
423 krb5_principal impersonate_principal,
424 Ticket *second_ticket,
425 krb5_creds *out_creds)
426{
427 TGS_REQ req;
428 krb5_data enc;
429 krb5_data resp;
430 krb5_kdc_rep rep;
431 KRB_ERROR error;
432 krb5_error_code ret;
433 unsigned nonce;
434 krb5_keyblock *subkey = NULL;
435 size_t len = 0;
436 Ticket second_ticket_data;
437 METHOD_DATA padata;
438
439 krb5_data_zero(&resp);
440 krb5_data_zero(&enc);
441 padata.val = NULL;
442 padata.len = 0;
443
444 krb5_generate_random_block(&nonce, sizeof(nonce));
445 nonce &= 0xffffffff;
446
447 if(flags.b.enc_tkt_in_skey && second_ticket == NULL){
448 ret = decode_Ticket(in_creds->second_ticket.data,
449 in_creds->second_ticket.length,
450 &second_ticket_data, &len);
451 if(ret)
452 return ret;
453 second_ticket = &second_ticket_data;
454 }
455
456
457 if (impersonate_principal) {
458 krb5_crypto crypto;
459 PA_S4U2Self self;
460 krb5_data data;
461 void *buf;
462 size_t size = 0;
463
464 self.name = impersonate_principal->name;
465 self.realm = impersonate_principal->realm;
466 self.auth = estrdup("Kerberos");
467
468 ret = _krb5_s4u2self_to_checksumdata(context, &self, &data);
469 if (ret) {
470 free(self.auth);
471 goto out;
472 }
473
474 ret = krb5_crypto_init(context, &krbtgt->session, 0, &crypto);
475 if (ret) {
476 free(self.auth);
477 krb5_data_free(&data);
478 goto out;
479 }
480
481 ret = krb5_create_checksum(context,
482 crypto,
483 KRB5_KU_OTHER_CKSUM,
484 0,
485 data.data,
486 data.length,
487 &self.cksum);
488 krb5_crypto_destroy(context, crypto);
489 krb5_data_free(&data);
490 if (ret) {
491 free(self.auth);
492 goto out;
493 }
494
495 ASN1_MALLOC_ENCODE(PA_S4U2Self, buf, len, &self, &size, ret);
496 free(self.auth);
497 free_Checksum(&self.cksum);
498 if (ret)
499 goto out;
500 if (len != size)
501 krb5_abortx(context, "internal asn1 error");
502
503 ret = krb5_padata_add(context, &padata, KRB5_PADATA_FOR_USER, buf, len);
504 if (ret)
505 goto out;
506 }
507
508 ret = init_tgs_req (context,
509 id,
510 addresses,
511 flags,
512 second_ticket,
513 in_creds,
514 krbtgt,
515 nonce,
516 &padata,
517 &subkey,
518 &req);
519 if (ret)
520 goto out;
521
522 ASN1_MALLOC_ENCODE(TGS_REQ, enc.data, enc.length, &req, &len, ret);
523 if (ret)
524 goto out;
525 if(enc.length != len)
526 krb5_abortx(context, "internal error in ASN.1 encoder");
527
528 /* don't free addresses */
529 req.req_body.addresses = NULL;
530 free_TGS_REQ(&req);
531
532 /*
533 * Send and receive
534 */
535 {
536 krb5_sendto_ctx stctx;
537 ret = krb5_sendto_ctx_alloc(context, &stctx);
538 if (ret)
539 return ret;
540 krb5_sendto_ctx_set_func(stctx, _krb5_kdc_retry, NULL);
541
542 ret = krb5_sendto_context (context, stctx, &enc,
543 krbtgt->server->name.name_string.val[1],
544 &resp);
545 krb5_sendto_ctx_free(context, stctx);
546 }
547 if(ret)
548 goto out;
549
550 memset(&rep, 0, sizeof(rep));
551 if(decode_TGS_REP(resp.data, resp.length, &rep.kdc_rep, &len) == 0) {
552 unsigned eflags = 0;
553
554 ret = krb5_copy_principal(context,
555 in_creds->client,
556 &out_creds->client);
557 if(ret)
558 goto out2;
559 ret = krb5_copy_principal(context,
560 in_creds->server,
561 &out_creds->server);
562 if(ret)
563 goto out2;
564 /* this should go someplace else */
565 out_creds->times.endtime = in_creds->times.endtime;
566
567 /* XXX should do better testing */
568 if (flags.b.constrained_delegation || impersonate_principal)
569 eflags |= EXTRACT_TICKET_ALLOW_CNAME_MISMATCH;
570
571 ret = _krb5_extract_ticket(context,
572 &rep,
573 out_creds,
574 &krbtgt->session,
575 NULL,
576 0,
577 &krbtgt->addresses,
578 nonce,
579 eflags,
580 decrypt_tkt_with_subkey,
581 subkey);
582 out2:
583 krb5_free_kdc_rep(context, &rep);
584 } else if(krb5_rd_error(context, &resp, &error) == 0) {
585 ret = krb5_error_from_rd_error(context, &error, in_creds);
586 krb5_free_error_contents(context, &error);
587 } else if(resp.length > 0 && ((char*)resp.data)[0] == 4) {
588 ret = KRB5KRB_AP_ERR_V4_REPLY;
589 krb5_clear_error_message(context);
590 } else {
591 ret = KRB5KRB_AP_ERR_MSG_TYPE;
592 krb5_clear_error_message(context);
593 }
594
595out:
596 if (second_ticket == &second_ticket_data)
597 free_Ticket(&second_ticket_data);
598 free_METHOD_DATA(&padata);
599 krb5_data_free(&resp);
600 krb5_data_free(&enc);
601 if(subkey)
602 krb5_free_keyblock(context, subkey);
603 return ret;
604
605}
606
607/*
608 * same as above, just get local addresses first if the krbtgt have
609 * them and the realm is not addressless
610 */
611
612static krb5_error_code
613get_cred_kdc_address(krb5_context context,
614 krb5_ccache id,
615 krb5_kdc_flags flags,
616 krb5_addresses *addrs,
617 krb5_creds *in_creds,
618 krb5_creds *krbtgt,
619 krb5_principal impersonate_principal,
620 Ticket *second_ticket,
621 krb5_creds *out_creds)
622{
623 krb5_error_code ret;
624 krb5_addresses addresses = { 0, NULL };
625
626 /*
627 * Inherit the address-ness of the krbtgt if the address is not
628 * specified.
629 */
630
631 if (addrs == NULL && krbtgt->addresses.len != 0) {
632 krb5_boolean noaddr;
633
634 krb5_appdefault_boolean(context, NULL, krbtgt->server->realm,
635 "no-addresses", FALSE, &noaddr);
636
637 if (!noaddr) {
638 krb5_get_all_client_addrs(context, &addresses);
639 /* XXX this sucks. */
640 addrs = &addresses;
641 if(addresses.len == 0)
642 addrs = NULL;
643 }
644 }
645 ret = get_cred_kdc(context, id, flags, addrs, in_creds,
646 krbtgt, impersonate_principal,
647 second_ticket, out_creds);
648 krb5_free_addresses(context, &addresses);
649 return ret;
650}
651
652KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
653krb5_get_kdc_cred(krb5_context context,
654 krb5_ccache id,
655 krb5_kdc_flags flags,
656 krb5_addresses *addresses,
657 Ticket *second_ticket,
658 krb5_creds *in_creds,
659 krb5_creds **out_creds
660 )
661{
662 krb5_error_code ret;
663 krb5_creds *krbtgt;
664
665 *out_creds = calloc(1, sizeof(**out_creds));
666 if(*out_creds == NULL) {
667 krb5_set_error_message(context, ENOMEM,
668 N_("malloc: out of memory", ""));
669 return ENOMEM;
670 }
671 ret = _krb5_get_krbtgt (context,
672 id,
673 in_creds->server->realm,
674 &krbtgt);
675 if(ret) {
676 free(*out_creds);
677 *out_creds = NULL;
678 return ret;
679 }
680 ret = get_cred_kdc(context, id, flags, addresses,
681 in_creds, krbtgt, NULL, NULL, *out_creds);
682 krb5_free_creds (context, krbtgt);
683 if(ret) {
684 free(*out_creds);
685 *out_creds = NULL;
686 }
687 return ret;
688}
689
690static int
691not_found(krb5_context context, krb5_const_principal p, krb5_error_code code)
692{
693 krb5_error_code ret;
694 char *str;
695
696 ret = krb5_unparse_name(context, p, &str);
697 if(ret) {
698 krb5_clear_error_message(context);
699 return code;
700 }
701 krb5_set_error_message(context, code,
702 N_("Matching credential (%s) not found", ""), str);
703 free(str);
704 return code;
705}
706
707static krb5_error_code
708find_cred(krb5_context context,
709 krb5_ccache id,
710 krb5_principal server,
711 krb5_creds **tgts,
712 krb5_creds *out_creds)
713{
714 krb5_error_code ret;
715 krb5_creds mcreds;
716
717 krb5_cc_clear_mcred(&mcreds);
718 mcreds.server = server;
719 ret = krb5_cc_retrieve_cred(context, id, KRB5_TC_DONT_MATCH_REALM,
720 &mcreds, out_creds);
721 if(ret == 0)
722 return 0;
723 while(tgts && *tgts){
724 if(krb5_compare_creds(context, KRB5_TC_DONT_MATCH_REALM,
725 &mcreds, *tgts)){
726 ret = krb5_copy_creds_contents(context, *tgts, out_creds);
727 return ret;
728 }
729 tgts++;
730 }
731 return not_found(context, server, KRB5_CC_NOTFOUND);
732}
733
734static krb5_error_code
735add_cred(krb5_context context, krb5_creds const *tkt, krb5_creds ***tgts)
736{
737 int i;
738 krb5_error_code ret;
739 krb5_creds **tmp = *tgts;
740
741 for(i = 0; tmp && tmp[i]; i++); /* XXX */
742 tmp = realloc(tmp, (i+2)*sizeof(*tmp));
743 if(tmp == NULL) {
744 krb5_set_error_message(context, ENOMEM,
745 N_("malloc: out of memory", ""));
746 return ENOMEM;
747 }
748 *tgts = tmp;
749 ret = krb5_copy_creds(context, tkt, &tmp[i]);
750 tmp[i+1] = NULL;
751 return ret;
752}
753
754static krb5_error_code
755get_cred_kdc_capath_worker(krb5_context context,
756 krb5_kdc_flags flags,
757 krb5_ccache ccache,
758 krb5_creds *in_creds,
759 krb5_const_realm try_realm,
760 krb5_principal impersonate_principal,
761 Ticket *second_ticket,
762 krb5_creds **out_creds,
763 krb5_creds ***ret_tgts)
764{
765 krb5_error_code ret;
766 krb5_creds *tgt, tmp_creds;
767 krb5_const_realm client_realm, server_realm;
768 int ok_as_delegate = 1;
769
770 *out_creds = NULL;
771
772 client_realm = krb5_principal_get_realm(context, in_creds->client);
773 server_realm = krb5_principal_get_realm(context, in_creds->server);
774 memset(&tmp_creds, 0, sizeof(tmp_creds));
775 ret = krb5_copy_principal(context, in_creds->client, &tmp_creds.client);
776 if(ret)
777 return ret;
778
779 ret = krb5_make_principal(context,
780 &tmp_creds.server,
781 try_realm,
782 KRB5_TGS_NAME,
783 server_realm,
784 NULL);
785 if(ret){
786 krb5_free_principal(context, tmp_creds.client);
787 return ret;
788 }
789 {
790 krb5_creds tgts;
791
792 ret = find_cred(context, ccache, tmp_creds.server,
793 *ret_tgts, &tgts);
794 if(ret == 0){
795 /* only allow implicit ok_as_delegate if the realm is the clients realm */
796 if (strcmp(try_realm, client_realm) != 0 || strcmp(try_realm, server_realm) != 0)
797 ok_as_delegate = tgts.flags.b.ok_as_delegate;
798
799 *out_creds = calloc(1, sizeof(**out_creds));
800 if(*out_creds == NULL) {
801 ret = ENOMEM;
802 krb5_set_error_message(context, ret,
803 N_("malloc: out of memory", ""));
804 } else {
805 ret = get_cred_kdc_address(context, ccache, flags, NULL,
806 in_creds, &tgts,
807 impersonate_principal,
808 second_ticket,
809 *out_creds);
810 if (ret) {
811 free (*out_creds);
812 *out_creds = NULL;
813 } else if (ok_as_delegate == 0)
814 (*out_creds)->flags.b.ok_as_delegate = 0;
815 }
816 krb5_free_cred_contents(context, &tgts);
817 krb5_free_principal(context, tmp_creds.server);
818 krb5_free_principal(context, tmp_creds.client);
819 return ret;
820 }
821 }
822 if(krb5_realm_compare(context, in_creds->client, in_creds->server))
823 return not_found(context, in_creds->server, KRB5_CC_NOTFOUND);
824
825 /* XXX this can loop forever */
826 while(1){
827 heim_general_string tgt_inst;
828
829 ret = get_cred_kdc_capath(context, flags, ccache, &tmp_creds,
830 NULL, NULL, &tgt, ret_tgts);
831 if(ret) {
832 krb5_free_principal(context, tmp_creds.server);
833 krb5_free_principal(context, tmp_creds.client);
834 return ret;
835 }
836 /*
837 * if either of the chain or the ok_as_delegate was stripped
838 * by the kdc, make sure we strip it too.
839 */
840 if (ok_as_delegate == 0 || tgt->flags.b.ok_as_delegate == 0) {
841 ok_as_delegate = 0;
842 tgt->flags.b.ok_as_delegate = 0;
843 }
844
845 ret = add_cred(context, tgt, ret_tgts);
846 if(ret) {
847 krb5_free_principal(context, tmp_creds.server);
848 krb5_free_principal(context, tmp_creds.client);
849 return ret;
850 }
851 tgt_inst = tgt->server->name.name_string.val[1];
852 if(strcmp(tgt_inst, server_realm) == 0)
853 break;
854 krb5_free_principal(context, tmp_creds.server);
855 ret = krb5_make_principal(context, &tmp_creds.server,
856 tgt_inst, KRB5_TGS_NAME, server_realm, NULL);
857 if(ret) {
858 krb5_free_principal(context, tmp_creds.server);
859 krb5_free_principal(context, tmp_creds.client);
860 return ret;
861 }
862 ret = krb5_free_creds(context, tgt);
863 if(ret) {
864 krb5_free_principal(context, tmp_creds.server);
865 krb5_free_principal(context, tmp_creds.client);
866 return ret;
867 }
868 }
869
870 krb5_free_principal(context, tmp_creds.server);
871 krb5_free_principal(context, tmp_creds.client);
872 *out_creds = calloc(1, sizeof(**out_creds));
873 if(*out_creds == NULL) {
874 ret = ENOMEM;
875 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
876 } else {
877 ret = get_cred_kdc_address (context, ccache, flags, NULL,
878 in_creds, tgt, impersonate_principal,
879 second_ticket, *out_creds);
880 if (ret) {
881 free (*out_creds);
882 *out_creds = NULL;
883 }
884 }
885 krb5_free_creds(context, tgt);
886 return ret;
887}
888
889/*
890get_cred(server)
891 creds = cc_get_cred(server)
892 if(creds) return creds
893 tgt = cc_get_cred(krbtgt/server_realm@any_realm)
894 if(tgt)
895 return get_cred_tgt(server, tgt)
896 if(client_realm == server_realm)
897 return NULL
898 tgt = get_cred(krbtgt/server_realm@client_realm)
899 while(tgt_inst != server_realm)
900 tgt = get_cred(krbtgt/server_realm@tgt_inst)
901 return get_cred_tgt(server, tgt)
902 */
903
904static krb5_error_code
905get_cred_kdc_capath(krb5_context context,
906 krb5_kdc_flags flags,
907 krb5_ccache ccache,
908 krb5_creds *in_creds,
909 krb5_principal impersonate_principal,
910 Ticket *second_ticket,
911 krb5_creds **out_creds,
912 krb5_creds ***ret_tgts)
913{
914 krb5_error_code ret;
915 krb5_const_realm client_realm, server_realm, try_realm;
916
917 client_realm = krb5_principal_get_realm(context, in_creds->client);
918 server_realm = krb5_principal_get_realm(context, in_creds->server);
919
920 try_realm = client_realm;
921 ret = get_cred_kdc_capath_worker(context, flags, ccache, in_creds, try_realm,
922 impersonate_principal, second_ticket, out_creds,
923 ret_tgts);
924
925 if (ret == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN) {
926 try_realm = krb5_config_get_string(context, NULL, "capaths",
927 client_realm, server_realm, NULL);
928
929 if (try_realm != NULL && strcmp(try_realm, client_realm)) {
930 ret = get_cred_kdc_capath_worker(context, flags, ccache, in_creds,
931 try_realm, impersonate_principal,
932 second_ticket, out_creds, ret_tgts);
933 }
934 }
935
936 return ret;
937}
938
939static krb5_error_code
940get_cred_kdc_referral(krb5_context context,
941 krb5_kdc_flags flags,
942 krb5_ccache ccache,
943 krb5_creds *in_creds,
944 krb5_principal impersonate_principal,
945 Ticket *second_ticket,
946 krb5_creds **out_creds,
947 krb5_creds ***ret_tgts)
948{
949 krb5_const_realm client_realm;
950 krb5_error_code ret;
951 krb5_creds tgt, referral, ticket;
952 int loop = 0;
953 int ok_as_delegate = 1;
954
955 if (in_creds->server->name.name_string.len < 2 && !flags.b.canonicalize) {
956 krb5_set_error_message(context, KRB5KDC_ERR_PATH_NOT_ACCEPTED,
957 N_("Name too short to do referals, skipping", ""));
958 return KRB5KDC_ERR_PATH_NOT_ACCEPTED;
959 }
960
961 memset(&tgt, 0, sizeof(tgt));
962 memset(&ticket, 0, sizeof(ticket));
963
964 flags.b.canonicalize = 1;
965
966 *out_creds = NULL;
967
968 client_realm = krb5_principal_get_realm(context, in_creds->client);
969
970 /* find tgt for the clients base realm */
971 {
972 krb5_principal tgtname;
973
974 ret = krb5_make_principal(context, &tgtname,
975 client_realm,
976 KRB5_TGS_NAME,
977 client_realm,
978 NULL);
979 if(ret)
980 return ret;
981
982 ret = find_cred(context, ccache, tgtname, *ret_tgts, &tgt);
983 krb5_free_principal(context, tgtname);
984 if (ret)
985 return ret;
986 }
987
988 referral = *in_creds;
989 ret = krb5_copy_principal(context, in_creds->server, &referral.server);
990 if (ret) {
991 krb5_free_cred_contents(context, &tgt);
992 return ret;
993 }
994 ret = krb5_principal_set_realm(context, referral.server, client_realm);
995 if (ret) {
996 krb5_free_cred_contents(context, &tgt);
997 krb5_free_principal(context, referral.server);
998 return ret;
999 }
1000
1001 while (loop++ < 17) {
1002 krb5_creds **tickets;
1003 krb5_creds mcreds;
1004 char *referral_realm;
1005
1006 /* Use cache if we are not doing impersonation or contrainte deleg */
1007 if (impersonate_principal == NULL || flags.b.constrained_delegation) {
1008 krb5_cc_clear_mcred(&mcreds);
1009 mcreds.server = referral.server;
1010 ret = krb5_cc_retrieve_cred(context, ccache, 0, &mcreds, &ticket);
1011 } else
1012 ret = EINVAL;
1013
1014 if (ret) {
1015 ret = get_cred_kdc_address(context, ccache, flags, NULL,
1016 &referral, &tgt, impersonate_principal,
1017 second_ticket, &ticket);
1018 if (ret)
1019 goto out;
1020 }
1021
1022 /* Did we get the right ticket ? */
1023 if (krb5_principal_compare_any_realm(context,
1024 referral.server,
1025 ticket.server))
1026 break;
1027
1028 if (!krb5_principal_is_krbtgt(context, ticket.server)) {
1029 krb5_set_error_message(context, KRB5KRB_AP_ERR_NOT_US,
1030 N_("Got back an non krbtgt "
1031 "ticket referrals", ""));
1032 ret = KRB5KRB_AP_ERR_NOT_US;
1033 goto out;
1034 }
1035
1036 referral_realm = ticket.server->name.name_string.val[1];
1037
1038 /* check that there are no referrals loops */
1039 tickets = *ret_tgts;
1040
1041 krb5_cc_clear_mcred(&mcreds);
1042 mcreds.server = ticket.server;
1043
1044 while(tickets && *tickets){
1045 if(krb5_compare_creds(context,
1046 KRB5_TC_DONT_MATCH_REALM,
1047 &mcreds,
1048 *tickets))
1049 {
1050 krb5_set_error_message(context, KRB5_GET_IN_TKT_LOOP,
1051 N_("Referral from %s "
1052 "loops back to realm %s", ""),
1053 tgt.server->realm,
1054 referral_realm);
1055 ret = KRB5_GET_IN_TKT_LOOP;
1056 goto out;
1057 }
1058 tickets++;
1059 }
1060
1061 /*
1062 * if either of the chain or the ok_as_delegate was stripped
1063 * by the kdc, make sure we strip it too.
1064 */
1065
1066 if (ok_as_delegate == 0 || ticket.flags.b.ok_as_delegate == 0) {
1067 ok_as_delegate = 0;
1068 ticket.flags.b.ok_as_delegate = 0;
1069 }
1070
1071 ret = add_cred(context, &ticket, ret_tgts);
1072 if (ret)
1073 goto out;
1074
1075 /* try realm in the referral */
1076 ret = krb5_principal_set_realm(context,
1077 referral.server,
1078 referral_realm);
1079 krb5_free_cred_contents(context, &tgt);
1080 tgt = ticket;
1081 memset(&ticket, 0, sizeof(ticket));
1082 if (ret)
1083 goto out;
1084 }
1085
1086 ret = krb5_copy_creds(context, &ticket, out_creds);
1087
1088out:
1089 krb5_free_principal(context, referral.server);
1090 krb5_free_cred_contents(context, &tgt);
1091 krb5_free_cred_contents(context, &ticket);
1092 return ret;
1093}
1094
1095
1096/*
1097 * Glue function between referrals version and old client chasing
1098 * codebase.
1099 */
1100
1101krb5_error_code
1102_krb5_get_cred_kdc_any(krb5_context context,
1103 krb5_kdc_flags flags,
1104 krb5_ccache ccache,
1105 krb5_creds *in_creds,
1106 krb5_principal impersonate_principal,
1107 Ticket *second_ticket,
1108 krb5_creds **out_creds,
1109 krb5_creds ***ret_tgts)
1110{
1111 krb5_error_code ret;
1112 krb5_deltat offset;
1113
1114 ret = krb5_cc_get_kdc_offset(context, ccache, &offset);
1115 if (ret) {
1116 context->kdc_sec_offset = offset;
1117 context->kdc_usec_offset = 0;
1118 }
1119
1120 ret = get_cred_kdc_referral(context,
1121 flags,
1122 ccache,
1123 in_creds,
1124 impersonate_principal,
1125 second_ticket,
1126 out_creds,
1127 ret_tgts);
1128 if (ret == 0 || flags.b.canonicalize)
1129 return ret;
1130 return get_cred_kdc_capath(context,
1131 flags,
1132 ccache,
1133 in_creds,
1134 impersonate_principal,
1135 second_ticket,
1136 out_creds,
1137 ret_tgts);
1138}
1139
1140
1141KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1142krb5_get_credentials_with_flags(krb5_context context,
1143 krb5_flags options,
1144 krb5_kdc_flags flags,
1145 krb5_ccache ccache,
1146 krb5_creds *in_creds,
1147 krb5_creds **out_creds)
1148{
1149 krb5_error_code ret;
1150 krb5_creds **tgts;
1151 krb5_creds *res_creds;
1152 int i;
1153
1154 if (in_creds->session.keytype) {
1155 ret = krb5_enctype_valid(context, in_creds->session.keytype);
1156 if (ret)
1157 return ret;
1158 }
1159
1160 *out_creds = NULL;
1161 res_creds = calloc(1, sizeof(*res_creds));
1162 if (res_creds == NULL) {
1163 krb5_set_error_message(context, ENOMEM,
1164 N_("malloc: out of memory", ""));
1165 return ENOMEM;
1166 }
1167
1168 if (in_creds->session.keytype)
1169 options |= KRB5_TC_MATCH_KEYTYPE;
1170
1171 /*
1172 * If we got a credential, check if credential is expired before
1173 * returning it.
1174 */
1175 ret = krb5_cc_retrieve_cred(context,
1176 ccache,
1177 in_creds->session.keytype ?
1178 KRB5_TC_MATCH_KEYTYPE : 0,
1179 in_creds, res_creds);
1180 /*
1181 * If we got a credential, check if credential is expired before
1182 * returning it, but only if KRB5_GC_EXPIRED_OK is not set.
1183 */
1184 if (ret == 0) {
1185 krb5_timestamp timeret;
1186
1187 /* If expired ok, don't bother checking */
1188 if(options & KRB5_GC_EXPIRED_OK) {
1189 *out_creds = res_creds;
1190 return 0;
1191 }
1192
1193 krb5_timeofday(context, &timeret);
1194 if(res_creds->times.endtime > timeret) {
1195 *out_creds = res_creds;
1196 return 0;
1197 }
1198 if(options & KRB5_GC_CACHED)
1199 krb5_cc_remove_cred(context, ccache, 0, res_creds);
1200
1201 } else if(ret != KRB5_CC_END) {
1202 free(res_creds);
1203 return ret;
1204 }
1205 free(res_creds);
1206 if(options & KRB5_GC_CACHED)
1207 return not_found(context, in_creds->server, KRB5_CC_NOTFOUND);
1208
1209 if(options & KRB5_GC_USER_USER)
1210 flags.b.enc_tkt_in_skey = 1;
1211 if (flags.b.enc_tkt_in_skey)
1212 options |= KRB5_GC_NO_STORE;
1213
1214 tgts = NULL;
1215 ret = _krb5_get_cred_kdc_any(context, flags, ccache,
1216 in_creds, NULL, NULL, out_creds, &tgts);
1217 for(i = 0; tgts && tgts[i]; i++) {
1218 krb5_cc_store_cred(context, ccache, tgts[i]);
1219 krb5_free_creds(context, tgts[i]);
1220 }
1221 free(tgts);
1222 if(ret == 0 && (options & KRB5_GC_NO_STORE) == 0)
1223 krb5_cc_store_cred(context, ccache, *out_creds);
1224 return ret;
1225}
1226
1227KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1228krb5_get_credentials(krb5_context context,
1229 krb5_flags options,
1230 krb5_ccache ccache,
1231 krb5_creds *in_creds,
1232 krb5_creds **out_creds)
1233{
1234 krb5_kdc_flags flags;
1235 flags.i = 0;
1236 return krb5_get_credentials_with_flags(context, options, flags,
1237 ccache, in_creds, out_creds);
1238}
1239
1240struct krb5_get_creds_opt_data {
1241 krb5_principal self;
1242 krb5_flags options;
1243 krb5_enctype enctype;
1244 Ticket *ticket;
1245};
1246
1247
1248KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1249krb5_get_creds_opt_alloc(krb5_context context, krb5_get_creds_opt *opt)
1250{
1251 *opt = calloc(1, sizeof(**opt));
1252 if (*opt == NULL) {
1253 krb5_set_error_message(context, ENOMEM,
1254 N_("malloc: out of memory", ""));
1255 return ENOMEM;
1256 }
1257 return 0;
1258}
1259
1260KRB5_LIB_FUNCTION void KRB5_LIB_CALL
1261krb5_get_creds_opt_free(krb5_context context, krb5_get_creds_opt opt)
1262{
1263 if (opt->self)
1264 krb5_free_principal(context, opt->self);
1265 if (opt->ticket) {
1266 free_Ticket(opt->ticket);
1267 free(opt->ticket);
1268 }
1269 memset(opt, 0, sizeof(*opt));
1270 free(opt);
1271}
1272
1273KRB5_LIB_FUNCTION void KRB5_LIB_CALL
1274krb5_get_creds_opt_set_options(krb5_context context,
1275 krb5_get_creds_opt opt,
1276 krb5_flags options)
1277{
1278 opt->options = options;
1279}
1280
1281KRB5_LIB_FUNCTION void KRB5_LIB_CALL
1282krb5_get_creds_opt_add_options(krb5_context context,
1283 krb5_get_creds_opt opt,
1284 krb5_flags options)
1285{
1286 opt->options |= options;
1287}
1288
1289KRB5_LIB_FUNCTION void KRB5_LIB_CALL
1290krb5_get_creds_opt_set_enctype(krb5_context context,
1291 krb5_get_creds_opt opt,
1292 krb5_enctype enctype)
1293{
1294 opt->enctype = enctype;
1295}
1296
1297KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1298krb5_get_creds_opt_set_impersonate(krb5_context context,
1299 krb5_get_creds_opt opt,
1300 krb5_const_principal self)
1301{
1302 if (opt->self)
1303 krb5_free_principal(context, opt->self);
1304 return krb5_copy_principal(context, self, &opt->self);
1305}
1306
1307KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1308krb5_get_creds_opt_set_ticket(krb5_context context,
1309 krb5_get_creds_opt opt,
1310 const Ticket *ticket)
1311{
1312 if (opt->ticket) {
1313 free_Ticket(opt->ticket);
1314 free(opt->ticket);
1315 opt->ticket = NULL;
1316 }
1317 if (ticket) {
1318 krb5_error_code ret;
1319
1320 opt->ticket = malloc(sizeof(*ticket));
1321 if (opt->ticket == NULL) {
1322 krb5_set_error_message(context, ENOMEM,
1323 N_("malloc: out of memory", ""));
1324 return ENOMEM;
1325 }
1326 ret = copy_Ticket(ticket, opt->ticket);
1327 if (ret) {
1328 free(opt->ticket);
1329 opt->ticket = NULL;
1330 krb5_set_error_message(context, ret,
1331 N_("malloc: out of memory", ""));
1332 return ret;
1333 }
1334 }
1335 return 0;
1336}
1337
1338
1339
1340KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1341krb5_get_creds(krb5_context context,
1342 krb5_get_creds_opt opt,
1343 krb5_ccache ccache,
1344 krb5_const_principal inprinc,
1345 krb5_creds **out_creds)
1346{
1347 krb5_kdc_flags flags;
1348 krb5_flags options;
1349 krb5_creds in_creds;
1350 krb5_error_code ret;
1351 krb5_creds **tgts;
1352 krb5_creds *res_creds;
1353 int i;
1354
1355 if (opt && opt->enctype) {
1356 ret = krb5_enctype_valid(context, opt->enctype);
1357 if (ret)
1358 return ret;
1359 }
1360
1361 memset(&in_creds, 0, sizeof(in_creds));
1362 in_creds.server = rk_UNCONST(inprinc);
1363
1364 ret = krb5_cc_get_principal(context, ccache, &in_creds.client);
1365 if (ret)
1366 return ret;
1367
1368 if (opt)
1369 options = opt->options;
1370 else
1371 options = 0;
1372 flags.i = 0;
1373
1374 *out_creds = NULL;
1375 res_creds = calloc(1, sizeof(*res_creds));
1376 if (res_creds == NULL) {
1377 krb5_free_principal(context, in_creds.client);
1378 krb5_set_error_message(context, ENOMEM,
1379 N_("malloc: out of memory", ""));
1380 return ENOMEM;
1381 }
1382
1383 if (opt && opt->enctype) {
1384 in_creds.session.keytype = opt->enctype;
1385 options |= KRB5_TC_MATCH_KEYTYPE;
1386 }
1387
1388 /*
1389 * If we got a credential, check if credential is expired before
1390 * returning it.
1391 */
1392 ret = krb5_cc_retrieve_cred(context,
1393 ccache,
1394 options & KRB5_TC_MATCH_KEYTYPE,
1395 &in_creds, res_creds);
1396 /*
1397 * If we got a credential, check if credential is expired before
1398 * returning it, but only if KRB5_GC_EXPIRED_OK is not set.
1399 */
1400 if (ret == 0) {
1401 krb5_timestamp timeret;
1402
1403 /* If expired ok, don't bother checking */
1404 if(options & KRB5_GC_EXPIRED_OK) {
1405 *out_creds = res_creds;
1406 krb5_free_principal(context, in_creds.client);
1407 goto out;
1408 }
1409
1410 krb5_timeofday(context, &timeret);
1411 if(res_creds->times.endtime > timeret) {
1412 *out_creds = res_creds;
1413 krb5_free_principal(context, in_creds.client);
1414 goto out;
1415 }
1416 if(options & KRB5_GC_CACHED)
1417 krb5_cc_remove_cred(context, ccache, 0, res_creds);
1418
1419 } else if(ret != KRB5_CC_END) {
1420 free(res_creds);
1421 krb5_free_principal(context, in_creds.client);
1422 goto out;
1423 }
1424 free(res_creds);
1425 if(options & KRB5_GC_CACHED) {
1426 krb5_free_principal(context, in_creds.client);
1427 ret = not_found(context, in_creds.server, KRB5_CC_NOTFOUND);
1428 goto out;
1429 }
1430 if(options & KRB5_GC_USER_USER) {
1431 flags.b.enc_tkt_in_skey = 1;
1432 options |= KRB5_GC_NO_STORE;
1433 }
1434 if (options & KRB5_GC_FORWARDABLE)
1435 flags.b.forwardable = 1;
1436 if (options & KRB5_GC_NO_TRANSIT_CHECK)
1437 flags.b.disable_transited_check = 1;
1438 if (options & KRB5_GC_CONSTRAINED_DELEGATION) {
1439 flags.b.request_anonymous = 1; /* XXX ARGH confusion */
1440 flags.b.constrained_delegation = 1;
1441 }
1442 if (options & KRB5_GC_CANONICALIZE)
1443 flags.b.canonicalize = 1;
1444
1445 tgts = NULL;
1446 ret = _krb5_get_cred_kdc_any(context, flags, ccache,
1447 &in_creds, opt->self, opt->ticket,
1448 out_creds, &tgts);
1449 krb5_free_principal(context, in_creds.client);
1450 for(i = 0; tgts && tgts[i]; i++) {
1451 krb5_cc_store_cred(context, ccache, tgts[i]);
1452 krb5_free_creds(context, tgts[i]);
1453 }
1454 free(tgts);
1455 if(ret == 0 && (options & KRB5_GC_NO_STORE) == 0)
1456 krb5_cc_store_cred(context, ccache, *out_creds);
1457
1458 out:
1459 _krb5_debug(context, 5, "krb5_get_creds: ret = %d", ret);
1460
1461 return ret;
1462}
1463
1464/*
1465 *
1466 */
1467
1468KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1469krb5_get_renewed_creds(krb5_context context,
1470 krb5_creds *creds,
1471 krb5_const_principal client,
1472 krb5_ccache ccache,
1473 const char *in_tkt_service)
1474{
1475 krb5_error_code ret;
1476 krb5_kdc_flags flags;
1477 krb5_creds in, *template, *out = NULL;
1478
1479 memset(&in, 0, sizeof(in));
1480 memset(creds, 0, sizeof(*creds));
1481
1482 ret = krb5_copy_principal(context, client, &in.client);
1483 if (ret)
1484 return ret;
1485
1486 if (in_tkt_service) {
1487 ret = krb5_parse_name(context, in_tkt_service, &in.server);
1488 if (ret) {
1489 krb5_free_principal(context, in.client);
1490 return ret;
1491 }
1492 } else {
1493 const char *realm = krb5_principal_get_realm(context, client);
1494
1495 ret = krb5_make_principal(context, &in.server, realm, KRB5_TGS_NAME,
1496 realm, NULL);
1497 if (ret) {
1498 krb5_free_principal(context, in.client);
1499 return ret;
1500 }
1501 }
1502
1503 flags.i = 0;
1504 flags.b.renewable = flags.b.renew = 1;
1505
1506 /*
1507 * Get template from old credential cache for the same entry, if
1508 * this failes, no worries.
1509 */
1510 ret = krb5_get_credentials(context, KRB5_GC_CACHED, ccache, &in, &template);
1511 if (ret == 0) {
1512 flags.b.forwardable = template->flags.b.forwardable;
1513 flags.b.proxiable = template->flags.b.proxiable;
1514 krb5_free_creds (context, template);
1515 }
1516
1517 ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &in, &out);
1518 krb5_free_principal(context, in.client);
1519 krb5_free_principal(context, in.server);
1520 if (ret)
1521 return ret;
1522
1523 ret = krb5_copy_creds_contents(context, out, creds);
1524 krb5_free_creds(context, out);
1525
1526 return ret;
1527}
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