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compare the value of the client realm now that it might not be the same pointer
[heimdal.git] / lib / krb5 / get_cred.c
blobf2985aa2a7877194ebfebc236c84064eddaf0981
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
39 static krb5_error_code
40 get_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
49 static krb5_error_code
50 make_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;
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
86 static krb5_error_code
87 set_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, 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
140 static krb5_error_code
141 init_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 &t->req_body.etype.len,
171 &t->req_body.etype.val,
172 NULL);
173 }
174 if (ret)
175 goto fail;
176 t->req_body.addresses = addresses;
177 t->req_body.kdc_options = flags.b;
178 ret = copy_Realm(&in_creds->server->realm, &t->req_body.realm);
179 if (ret)
180 goto fail;
181 ALLOC(t->req_body.sname, 1);
182 if (t->req_body.sname == NULL) {
183 ret = ENOMEM;
184 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
185 goto fail;
186 }
187
188 /* some versions of some code might require that the client be
189 present in TGS-REQs, but this is clearly against the spec */
190
191 ret = copy_PrincipalName(&in_creds->server->name, t->req_body.sname);
192 if (ret)
193 goto fail;
194
195 /* req_body.till should be NULL if there is no endtime specified,
196 but old MIT code (like DCE secd) doesn't like that */
197 ALLOC(t->req_body.till, 1);
198 if(t->req_body.till == NULL){
199 ret = ENOMEM;
200 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
201 goto fail;
202 }
203 *t->req_body.till = in_creds->times.endtime;
204
205 t->req_body.nonce = nonce;
206 if(second_ticket){
207 ALLOC(t->req_body.additional_tickets, 1);
208 if (t->req_body.additional_tickets == NULL) {
209 ret = ENOMEM;
210 krb5_set_error_message(context, ret,
211 N_("malloc: out of memory", ""));
212 goto fail;
213 }
214 ALLOC_SEQ(t->req_body.additional_tickets, 1);
215 if (t->req_body.additional_tickets->val == NULL) {
216 ret = ENOMEM;
217 krb5_set_error_message(context, ret,
218 N_("malloc: out of memory", ""));
219 goto fail;
220 }
221 ret = copy_Ticket(second_ticket, t->req_body.additional_tickets->val);
222 if (ret)
223 goto fail;
224 }
225 ALLOC(t->padata, 1);
226 if (t->padata == NULL) {
227 ret = ENOMEM;
228 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
229 goto fail;
230 }
231 ALLOC_SEQ(t->padata, 1 + padata->len);
232 if (t->padata->val == NULL) {
233 ret = ENOMEM;
234 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
235 goto fail;
236 }
237 {
238 int i;
239 for (i = 0; i < padata->len; i++) {
240 ret = copy_PA_DATA(&padata->val[i], &t->padata->val[i + 1]);
241 if (ret) {
242 krb5_set_error_message(context, ret,
243 N_("malloc: out of memory", ""));
244 goto fail;
245 }
246 }
247 }
248
249 ret = krb5_auth_con_init(context, &ac);
250 if(ret)
251 goto fail;
252
253 ret = krb5_auth_con_generatelocalsubkey(context, ac, &krbtgt->session);
254 if (ret)
255 goto fail;
256
257 ret = set_auth_data (context, &t->req_body, &in_creds->authdata,
258 ac->local_subkey);
259 if (ret)
260 goto fail;
261
262 ret = make_pa_tgs_req(context,
263 ac,
264 &t->req_body,
265 &t->padata->val[0],
266 krbtgt);
267 if(ret)
268 goto fail;
269
270 ret = krb5_auth_con_getlocalsubkey(context, ac, subkey);
271 if (ret)
272 goto fail;
273
274 fail:
275 if (ac)
276 krb5_auth_con_free(context, ac);
277 if (ret) {
278 t->req_body.addresses = NULL;
279 free_TGS_REQ (t);
280 }
281 return ret;
282 }
283
284 krb5_error_code
285 _krb5_get_krbtgt(krb5_context context,
286 krb5_ccache id,
287 krb5_realm realm,
288 krb5_creds **cred)
289 {
290 krb5_error_code ret;
291 krb5_creds tmp_cred;
292
293 memset(&tmp_cred, 0, sizeof(tmp_cred));
294
295 ret = krb5_cc_get_principal(context, id, &tmp_cred.client);
296 if (ret)
297 return ret;
298
299 ret = krb5_make_principal(context,
300 &tmp_cred.server,
301 realm,
302 KRB5_TGS_NAME,
303 realm,
304 NULL);
305 if(ret) {
306 krb5_free_principal(context, tmp_cred.client);
307 return ret;
308 }
309 ret = krb5_get_credentials(context,
310 KRB5_GC_CACHED,
311 id,
312 &tmp_cred,
313 cred);
314 krb5_free_principal(context, tmp_cred.client);
315 krb5_free_principal(context, tmp_cred.server);
316 if(ret)
317 return ret;
318 return 0;
319 }
320
321 /* DCE compatible decrypt proc */
322 static krb5_error_code KRB5_CALLCONV
323 decrypt_tkt_with_subkey (krb5_context context,
324 krb5_keyblock *key,
325 krb5_key_usage usage,
326 krb5_const_pointer subkey,
327 krb5_kdc_rep *dec_rep)
328 {
329 krb5_error_code ret;
330 krb5_data data;
331 size_t size;
332 krb5_crypto crypto;
333
334 assert(usage == 0);
335
336 /*
337 * start out with trying with subkey if we have one
338 */
339 if (subkey) {
340 ret = krb5_crypto_init(context, subkey, 0, &crypto);
341 if (ret)
342 return ret;
343 ret = krb5_decrypt_EncryptedData (context,
344 crypto,
345 KRB5_KU_TGS_REP_ENC_PART_SUB_KEY,
346 &dec_rep->kdc_rep.enc_part,
347 &data);
348 krb5_crypto_destroy(context, crypto);
349 }
350 if (subkey == NULL || ret) {
351 ret = krb5_crypto_init(context, key, 0, &crypto);
352 if (ret)
353 return ret;
354 ret = krb5_decrypt_EncryptedData (context,
355 crypto,
356 KRB5_KU_TGS_REP_ENC_PART_SESSION,
357 &dec_rep->kdc_rep.enc_part,
358 &data);
359 krb5_crypto_destroy(context, crypto);
360 }
361 if (ret)
362 return ret;
363
364 ret = decode_EncASRepPart(data.data,
365 data.length,
366 &dec_rep->enc_part,
367 &size);
368 if (ret)
369 ret = decode_EncTGSRepPart(data.data,
370 data.length,
371 &dec_rep->enc_part,
372 &size);
373 if (ret)
374 krb5_set_error_message(context, ret,
375 N_("Failed to decode encpart in ticket", ""));
376 krb5_data_free (&data);
377 return ret;
378 }
379
380 static krb5_error_code
381 get_cred_kdc(krb5_context context,
382 krb5_ccache id,
383 krb5_kdc_flags flags,
384 krb5_addresses *addresses,
385 krb5_creds *in_creds,
386 krb5_creds *krbtgt,
387 krb5_principal impersonate_principal,
388 Ticket *second_ticket,
389 krb5_creds *out_creds)
390 {
391 TGS_REQ req;
392 krb5_data enc;
393 krb5_data resp;
394 krb5_kdc_rep rep;
395 KRB_ERROR error;
396 krb5_error_code ret;
397 unsigned nonce;
398 krb5_keyblock *subkey = NULL;
399 size_t len;
400 Ticket second_ticket_data;
401 METHOD_DATA padata;
402
403 krb5_data_zero(&resp);
404 krb5_data_zero(&enc);
405 padata.val = NULL;
406 padata.len = 0;
407
408 krb5_generate_random_block(&nonce, sizeof(nonce));
409 nonce &= 0xffffffff;
410
411 if(flags.b.enc_tkt_in_skey && second_ticket == NULL){
412 ret = decode_Ticket(in_creds->second_ticket.data,
413 in_creds->second_ticket.length,
414 &second_ticket_data, &len);
415 if(ret)
416 return ret;
417 second_ticket = &second_ticket_data;
418 }
419
420
421 if (impersonate_principal) {
422 krb5_crypto crypto;
423 PA_S4U2Self self;
424 krb5_data data;
425 void *buf;
426 size_t size;
427
428 self.name = impersonate_principal->name;
429 self.realm = impersonate_principal->realm;
430 self.auth = estrdup("Kerberos");
431
432 ret = _krb5_s4u2self_to_checksumdata(context, &self, &data);
433 if (ret) {
434 free(self.auth);
435 goto out;
436 }
437
438 ret = krb5_crypto_init(context, &krbtgt->session, 0, &crypto);
439 if (ret) {
440 free(self.auth);
441 krb5_data_free(&data);
442 goto out;
443 }
444
445 ret = krb5_create_checksum(context,
446 crypto,
447 KRB5_KU_OTHER_CKSUM,
448 0,
449 data.data,
450 data.length,
451 &self.cksum);
452 krb5_crypto_destroy(context, crypto);
453 krb5_data_free(&data);
454 if (ret) {
455 free(self.auth);
456 goto out;
457 }
458
459 ASN1_MALLOC_ENCODE(PA_S4U2Self, buf, len, &self, &size, ret);
460 free(self.auth);
461 free_Checksum(&self.cksum);
462 if (ret)
463 goto out;
464 if (len != size)
465 krb5_abortx(context, "internal asn1 error");
466
467 ret = krb5_padata_add(context, &padata, KRB5_PADATA_FOR_USER, buf, len);
468 if (ret)
469 goto out;
470 }
471
472 ret = init_tgs_req (context,
473 id,
474 addresses,
475 flags,
476 second_ticket,
477 in_creds,
478 krbtgt,
479 nonce,
480 &padata,
481 &subkey,
482 &req);
483 if (ret)
484 goto out;
485
486 ASN1_MALLOC_ENCODE(TGS_REQ, enc.data, enc.length, &req, &len, ret);
487 if (ret)
488 goto out;
489 if(enc.length != len)
490 krb5_abortx(context, "internal error in ASN.1 encoder");
491
492 /* don't free addresses */
493 req.req_body.addresses = NULL;
494 free_TGS_REQ(&req);
495
496 /*
497 * Send and receive
498 */
499 {
500 krb5_sendto_ctx stctx;
501 ret = krb5_sendto_ctx_alloc(context, &stctx);
502 if (ret)
503 return ret;
504 krb5_sendto_ctx_set_func(stctx, _krb5_kdc_retry, NULL);
505
506 ret = krb5_sendto_context (context, stctx, &enc,
507 krbtgt->server->name.name_string.val[1],
508 &resp);
509 krb5_sendto_ctx_free(context, stctx);
510 }
511 if(ret)
512 goto out;
513
514 memset(&rep, 0, sizeof(rep));
515 if(decode_TGS_REP(resp.data, resp.length, &rep.kdc_rep, &len) == 0) {
516 unsigned eflags = 0;
517
518 ret = krb5_copy_principal(context,
519 in_creds->client,
520 &out_creds->client);
521 if(ret)
522 goto out2;
523 ret = krb5_copy_principal(context,
524 in_creds->server,
525 &out_creds->server);
526 if(ret)
527 goto out2;
528 /* this should go someplace else */
529 out_creds->times.endtime = in_creds->times.endtime;
530
531 /* XXX should do better testing */
532 if (flags.b.constrained_delegation || impersonate_principal)
533 eflags |= EXTRACT_TICKET_ALLOW_CNAME_MISMATCH;
534
535 ret = _krb5_extract_ticket(context,
536 &rep,
537 out_creds,
538 &krbtgt->session,
539 NULL,
540 0,
541 &krbtgt->addresses,
542 nonce,
543 eflags,
544 decrypt_tkt_with_subkey,
545 subkey);
546 out2:
547 krb5_free_kdc_rep(context, &rep);
548 } else if(krb5_rd_error(context, &resp, &error) == 0) {
549 ret = krb5_error_from_rd_error(context, &error, in_creds);
550 krb5_free_error_contents(context, &error);
551 } else if(resp.length > 0 && ((char*)resp.data)[0] == 4) {
552 ret = KRB5KRB_AP_ERR_V4_REPLY;
553 krb5_clear_error_message(context);
554 } else {
555 ret = KRB5KRB_AP_ERR_MSG_TYPE;
556 krb5_clear_error_message(context);
557 }
558
559 out:
560 if (second_ticket == &second_ticket_data)
561 free_Ticket(&second_ticket_data);
562 free_METHOD_DATA(&padata);
563 krb5_data_free(&resp);
564 krb5_data_free(&enc);
565 if(subkey)
566 krb5_free_keyblock(context, subkey);
567 return ret;
568
569 }
570
571 /*
572 * same as above, just get local addresses first if the krbtgt have
573 * them and the realm is not addressless
574 */
575
576 static krb5_error_code
577 get_cred_kdc_address(krb5_context context,
578 krb5_ccache id,
579 krb5_kdc_flags flags,
580 krb5_addresses *addrs,
581 krb5_creds *in_creds,
582 krb5_creds *krbtgt,
583 krb5_principal impersonate_principal,
584 Ticket *second_ticket,
585 krb5_creds *out_creds)
586 {
587 krb5_error_code ret;
588 krb5_addresses addresses = { 0, NULL };
589
590 /*
591 * Inherit the address-ness of the krbtgt if the address is not
592 * specified.
593 */
594
595 if (addrs == NULL && krbtgt->addresses.len != 0) {
596 krb5_boolean noaddr;
597
598 krb5_appdefault_boolean(context, NULL, krbtgt->server->realm,
599 "no-addresses", FALSE, &noaddr);
600
601 if (!noaddr) {
602 krb5_get_all_client_addrs(context, &addresses);
603 /* XXX this sucks. */
604 addrs = &addresses;
605 if(addresses.len == 0)
606 addrs = NULL;
607 }
608 }
609 ret = get_cred_kdc(context, id, flags, addrs, in_creds,
610 krbtgt, impersonate_principal,
611 second_ticket, out_creds);
612 krb5_free_addresses(context, &addresses);
613 return ret;
614 }
615
616 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
617 krb5_get_kdc_cred(krb5_context context,
618 krb5_ccache id,
619 krb5_kdc_flags flags,
620 krb5_addresses *addresses,
621 Ticket *second_ticket,
622 krb5_creds *in_creds,
623 krb5_creds **out_creds
624 )
625 {
626 krb5_error_code ret;
627 krb5_creds *krbtgt;
628
629 *out_creds = calloc(1, sizeof(**out_creds));
630 if(*out_creds == NULL) {
631 krb5_set_error_message(context, ENOMEM,
632 N_("malloc: out of memory", ""));
633 return ENOMEM;
634 }
635 ret = _krb5_get_krbtgt (context,
636 id,
637 in_creds->server->realm,
638 &krbtgt);
639 if(ret) {
640 free(*out_creds);
641 *out_creds = NULL;
642 return ret;
643 }
644 ret = get_cred_kdc(context, id, flags, addresses,
645 in_creds, krbtgt, NULL, NULL, *out_creds);
646 krb5_free_creds (context, krbtgt);
647 if(ret) {
648 free(*out_creds);
649 *out_creds = NULL;
650 }
651 return ret;
652 }
653
654 static int
655 not_found(krb5_context context, krb5_const_principal p, krb5_error_code code)
656 {
657 krb5_error_code ret;
658 char *str;
659
660 ret = krb5_unparse_name(context, p, &str);
661 if(ret) {
662 krb5_clear_error_message(context);
663 return code;
664 }
665 krb5_set_error_message(context, code,
666 N_("Matching credential (%s) not found", ""), str);
667 free(str);
668 return code;
669 }
670
671 static krb5_error_code
672 find_cred(krb5_context context,
673 krb5_ccache id,
674 krb5_principal server,
675 krb5_creds **tgts,
676 krb5_creds *out_creds)
677 {
678 krb5_error_code ret;
679 krb5_creds mcreds;
680
681 krb5_cc_clear_mcred(&mcreds);
682 mcreds.server = server;
683 ret = krb5_cc_retrieve_cred(context, id, KRB5_TC_DONT_MATCH_REALM,
684 &mcreds, out_creds);
685 if(ret == 0)
686 return 0;
687 while(tgts && *tgts){
688 if(krb5_compare_creds(context, KRB5_TC_DONT_MATCH_REALM,
689 &mcreds, *tgts)){
690 ret = krb5_copy_creds_contents(context, *tgts, out_creds);
691 return ret;
692 }
693 tgts++;
694 }
695 return not_found(context, server, KRB5_CC_NOTFOUND);
696 }
697
698 static krb5_error_code
699 add_cred(krb5_context context, krb5_creds const *tkt, krb5_creds ***tgts)
700 {
701 int i;
702 krb5_error_code ret;
703 krb5_creds **tmp = *tgts;
704
705 for(i = 0; tmp && tmp[i]; i++); /* XXX */
706 tmp = realloc(tmp, (i+2)*sizeof(*tmp));
707 if(tmp == NULL) {
708 krb5_set_error_message(context, ENOMEM,
709 N_("malloc: out of memory", ""));
710 return ENOMEM;
711 }
712 *tgts = tmp;
713 ret = krb5_copy_creds(context, tkt, &tmp[i]);
714 tmp[i+1] = NULL;
715 return ret;
716 }
717
718 static krb5_error_code
719 get_cred_kdc_capath_worker(krb5_context context,
720 krb5_kdc_flags flags,
721 krb5_ccache ccache,
722 krb5_creds *in_creds,
723 krb5_const_realm try_realm,
724 krb5_principal impersonate_principal,
725 Ticket *second_ticket,
726 krb5_creds **out_creds,
727 krb5_creds ***ret_tgts)
728 {
729 krb5_error_code ret;
730 krb5_creds *tgt, tmp_creds;
731 krb5_const_realm client_realm, server_realm;
732 int ok_as_delegate = 1;
733
734 *out_creds = NULL;
735
736 client_realm = krb5_principal_get_realm(context, in_creds->client);
737 server_realm = krb5_principal_get_realm(context, in_creds->server);
738 memset(&tmp_creds, 0, sizeof(tmp_creds));
739 ret = krb5_copy_principal(context, in_creds->client, &tmp_creds.client);
740 if(ret)
741 return ret;
742
743 ret = krb5_make_principal(context,
744 &tmp_creds.server,
745 try_realm,
746 KRB5_TGS_NAME,
747 server_realm,
748 NULL);
749 if(ret){
750 krb5_free_principal(context, tmp_creds.client);
751 return ret;
752 }
753 {
754 krb5_creds tgts;
755
756 ret = find_cred(context, ccache, tmp_creds.server,
757 *ret_tgts, &tgts);
758 if(ret == 0){
759 if (strcmp(try_realm, client_realm) != 0)
760 ok_as_delegate = tgts.flags.b.ok_as_delegate;
761
762 *out_creds = calloc(1, sizeof(**out_creds));
763 if(*out_creds == NULL) {
764 ret = ENOMEM;
765 krb5_set_error_message(context, ret,
766 N_("malloc: out of memory", ""));
767 } else {
768 ret = get_cred_kdc_address(context, ccache, flags, NULL,
769 in_creds, &tgts,
770 impersonate_principal,
771 second_ticket,
772 *out_creds);
773 if (ret) {
774 free (*out_creds);
775 *out_creds = NULL;
776 } else if (ok_as_delegate == 0)
777 (*out_creds)->flags.b.ok_as_delegate = 0;
778 }
779 krb5_free_cred_contents(context, &tgts);
780 krb5_free_principal(context, tmp_creds.server);
781 krb5_free_principal(context, tmp_creds.client);
782 return ret;
783 }
784 }
785 if(krb5_realm_compare(context, in_creds->client, in_creds->server))
786 return not_found(context, in_creds->server, KRB5_CC_NOTFOUND);
787
788 /* XXX this can loop forever */
789 while(1){
790 heim_general_string tgt_inst;
791
792 ret = get_cred_kdc_capath(context, flags, ccache, &tmp_creds,
793 NULL, NULL, &tgt, ret_tgts);
794 if(ret) {
795 krb5_free_principal(context, tmp_creds.server);
796 krb5_free_principal(context, tmp_creds.client);
797 return ret;
798 }
799 /*
800 * if either of the chain or the ok_as_delegate was stripped
801 * by the kdc, make sure we strip it too.
802 */
803 if (ok_as_delegate == 0 || tgt->flags.b.ok_as_delegate == 0) {
804 ok_as_delegate = 0;
805 tgt->flags.b.ok_as_delegate = 0;
806 }
807
808 ret = add_cred(context, tgt, ret_tgts);
809 if(ret) {
810 krb5_free_principal(context, tmp_creds.server);
811 krb5_free_principal(context, tmp_creds.client);
812 return ret;
813 }
814 tgt_inst = tgt->server->name.name_string.val[1];
815 if(strcmp(tgt_inst, server_realm) == 0)
816 break;
817 krb5_free_principal(context, tmp_creds.server);
818 ret = krb5_make_principal(context, &tmp_creds.server,
819 tgt_inst, KRB5_TGS_NAME, server_realm, NULL);
820 if(ret) {
821 krb5_free_principal(context, tmp_creds.server);
822 krb5_free_principal(context, tmp_creds.client);
823 return ret;
824 }
825 ret = krb5_free_creds(context, tgt);
826 if(ret) {
827 krb5_free_principal(context, tmp_creds.server);
828 krb5_free_principal(context, tmp_creds.client);
829 return ret;
830 }
831 }
832
833 krb5_free_principal(context, tmp_creds.server);
834 krb5_free_principal(context, tmp_creds.client);
835 *out_creds = calloc(1, sizeof(**out_creds));
836 if(*out_creds == NULL) {
837 ret = ENOMEM;
838 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
839 } else {
840 ret = get_cred_kdc_address (context, ccache, flags, NULL,
841 in_creds, tgt, impersonate_principal,
842 second_ticket, *out_creds);
843 if (ret) {
844 free (*out_creds);
845 *out_creds = NULL;
846 }
847 }
848 krb5_free_creds(context, tgt);
849 return ret;
850 }
851
852 /*
853 get_cred(server)
854 creds = cc_get_cred(server)
855 if(creds) return creds
856 tgt = cc_get_cred(krbtgt/server_realm@any_realm)
857 if(tgt)
858 return get_cred_tgt(server, tgt)
859 if(client_realm == server_realm)
860 return NULL
861 tgt = get_cred(krbtgt/server_realm@client_realm)
862 while(tgt_inst != server_realm)
863 tgt = get_cred(krbtgt/server_realm@tgt_inst)
864 return get_cred_tgt(server, tgt)
865 */
866
867 static krb5_error_code
868 get_cred_kdc_capath(krb5_context context,
869 krb5_kdc_flags flags,
870 krb5_ccache ccache,
871 krb5_creds *in_creds,
872 krb5_principal impersonate_principal,
873 Ticket *second_ticket,
874 krb5_creds **out_creds,
875 krb5_creds ***ret_tgts)
876 {
877 krb5_error_code ret;
878 krb5_const_realm client_realm, server_realm, try_realm;
879
880 client_realm = krb5_principal_get_realm(context, in_creds->client);
881 server_realm = krb5_principal_get_realm(context, in_creds->server);
882
883 try_realm = client_realm;
884 ret = get_cred_kdc_capath_worker(context, flags, ccache, in_creds, try_realm,
885 impersonate_principal, second_ticket, out_creds,
886 ret_tgts);
887
888 if (ret == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN) {
889 try_realm = krb5_config_get_string(context, NULL, "capaths",
890 client_realm, server_realm, NULL);
891
892 if (try_realm != NULL && strcmp(try_realm, client_realm)) {
893 ret = get_cred_kdc_capath_worker(context, flags, ccache, in_creds,
894 try_realm, impersonate_principal,
895 second_ticket, out_creds, ret_tgts);
896 }
897 }
898
899 return ret;
900 }
901
902 static krb5_error_code
903 get_cred_kdc_referral(krb5_context context,
904 krb5_kdc_flags flags,
905 krb5_ccache ccache,
906 krb5_creds *in_creds,
907 krb5_principal impersonate_principal,
908 Ticket *second_ticket,
909 krb5_creds **out_creds,
910 krb5_creds ***ret_tgts)
911 {
912 krb5_const_realm client_realm;
913 krb5_error_code ret;
914 krb5_creds tgt, referral, ticket;
915 int loop = 0;
916 int ok_as_delegate = 1;
917
918 if (in_creds->server->name.name_string.len < 2 && !flags.b.canonicalize) {
919 krb5_set_error_message(context, KRB5KDC_ERR_PATH_NOT_ACCEPTED,
920 N_("Name too short to do referals, skipping", ""));
921 return KRB5KDC_ERR_PATH_NOT_ACCEPTED;
922 }
923
924 memset(&tgt, 0, sizeof(tgt));
925 memset(&ticket, 0, sizeof(ticket));
926
927 flags.b.canonicalize = 1;
928
929 *out_creds = NULL;
930
931 client_realm = krb5_principal_get_realm(context, in_creds->client);
932
933 /* find tgt for the clients base realm */
934 {
935 krb5_principal tgtname;
936
937 ret = krb5_make_principal(context, &tgtname,
938 client_realm,
939 KRB5_TGS_NAME,
940 client_realm,
941 NULL);
942 if(ret)
943 return ret;
944
945 ret = find_cred(context, ccache, tgtname, *ret_tgts, &tgt);
946 krb5_free_principal(context, tgtname);
947 if (ret)
948 return ret;
949 }
950
951 referral = *in_creds;
952 ret = krb5_copy_principal(context, in_creds->server, &referral.server);
953 if (ret) {
954 krb5_free_cred_contents(context, &tgt);
955 return ret;
956 }
957 ret = krb5_principal_set_realm(context, referral.server, client_realm);
958 if (ret) {
959 krb5_free_cred_contents(context, &tgt);
960 krb5_free_principal(context, referral.server);
961 return ret;
962 }
963
964 while (loop++ < 17) {
965 krb5_creds **tickets;
966 krb5_creds mcreds;
967 char *referral_realm;
968
969 /* Use cache if we are not doing impersonation or contrainte deleg */
970 if (impersonate_principal == NULL || flags.b.constrained_delegation) {
971 krb5_cc_clear_mcred(&mcreds);
972 mcreds.server = referral.server;
973 ret = krb5_cc_retrieve_cred(context, ccache, 0, &mcreds, &ticket);
974 } else
975 ret = EINVAL;
976
977 if (ret) {
978 ret = get_cred_kdc_address(context, ccache, flags, NULL,
979 &referral, &tgt, impersonate_principal,
980 second_ticket, &ticket);
981 if (ret)
982 goto out;
983 }
984
985 /* Did we get the right ticket ? */
986 if (krb5_principal_compare_any_realm(context,
987 referral.server,
988 ticket.server))
989 break;
990
991 if (!krb5_principal_is_krbtgt(context, ticket.server)) {
992 krb5_set_error_message(context, KRB5KRB_AP_ERR_NOT_US,
993 N_("Got back an non krbtgt "
994 "ticket referrals", ""));
995 ret = KRB5KRB_AP_ERR_NOT_US;
996 goto out;
997 }
998
999 referral_realm = ticket.server->name.name_string.val[1];
1000
1001 /* check that there are no referrals loops */
1002 tickets = *ret_tgts;
1003
1004 krb5_cc_clear_mcred(&mcreds);
1005 mcreds.server = ticket.server;
1006
1007 while(tickets && *tickets){
1008 if(krb5_compare_creds(context,
1009 KRB5_TC_DONT_MATCH_REALM,
1010 &mcreds,
1011 *tickets))
1012 {
1013 krb5_set_error_message(context, KRB5_GET_IN_TKT_LOOP,
1014 N_("Referral from %s "
1015 "loops back to realm %s", ""),
1016 tgt.server->realm,
1017 referral_realm);
1018 ret = KRB5_GET_IN_TKT_LOOP;
1019 goto out;
1020 }
1021 tickets++;
1022 }
1023
1024 /*
1025 * if either of the chain or the ok_as_delegate was stripped
1026 * by the kdc, make sure we strip it too.
1027 */
1028
1029 if (ok_as_delegate == 0 || ticket.flags.b.ok_as_delegate == 0) {
1030 ok_as_delegate = 0;
1031 ticket.flags.b.ok_as_delegate = 0;
1032 }
1033
1034 ret = add_cred(context, &ticket, ret_tgts);
1035 if (ret)
1036 goto out;
1037
1038 /* try realm in the referral */
1039 ret = krb5_principal_set_realm(context,
1040 referral.server,
1041 referral_realm);
1042 krb5_free_cred_contents(context, &tgt);
1043 tgt = ticket;
1044 memset(&ticket, 0, sizeof(ticket));
1045 if (ret)
1046 goto out;
1047 }
1048
1049 ret = krb5_copy_creds(context, &ticket, out_creds);
1050
1051 out:
1052 krb5_free_principal(context, referral.server);
1053 krb5_free_cred_contents(context, &tgt);
1054 krb5_free_cred_contents(context, &ticket);
1055 return ret;
1056 }
1057
1058
1059 /*
1060 * Glue function between referrals version and old client chasing
1061 * codebase.
1062 */
1063
1064 krb5_error_code
1065 _krb5_get_cred_kdc_any(krb5_context context,
1066 krb5_kdc_flags flags,
1067 krb5_ccache ccache,
1068 krb5_creds *in_creds,
1069 krb5_principal impersonate_principal,
1070 Ticket *second_ticket,
1071 krb5_creds **out_creds,
1072 krb5_creds ***ret_tgts)
1073 {
1074 krb5_error_code ret;
1075 krb5_deltat offset;
1076
1077 ret = krb5_cc_get_kdc_offset(context, ccache, &offset);
1078 if (ret) {
1079 context->kdc_sec_offset = offset;
1080 context->kdc_usec_offset = 0;
1081 }
1082
1083 ret = get_cred_kdc_referral(context,
1084 flags,
1085 ccache,
1086 in_creds,
1087 impersonate_principal,
1088 second_ticket,
1089 out_creds,
1090 ret_tgts);
1091 if (ret == 0 || flags.b.canonicalize)
1092 return ret;
1093 return get_cred_kdc_capath(context,
1094 flags,
1095 ccache,
1096 in_creds,
1097 impersonate_principal,
1098 second_ticket,
1099 out_creds,
1100 ret_tgts);
1101 }
1102
1103
1104 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1105 krb5_get_credentials_with_flags(krb5_context context,
1106 krb5_flags options,
1107 krb5_kdc_flags flags,
1108 krb5_ccache ccache,
1109 krb5_creds *in_creds,
1110 krb5_creds **out_creds)
1111 {
1112 krb5_error_code ret;
1113 krb5_creds **tgts;
1114 krb5_creds *res_creds;
1115 int i;
1116
1117 if (in_creds->session.keytype) {
1118 ret = krb5_enctype_valid(context, in_creds->session.keytype);
1119 if (ret)
1120 return ret;
1121 }
1122
1123 *out_creds = NULL;
1124 res_creds = calloc(1, sizeof(*res_creds));
1125 if (res_creds == NULL) {
1126 krb5_set_error_message(context, ENOMEM,
1127 N_("malloc: out of memory", ""));
1128 return ENOMEM;
1129 }
1130
1131 if (in_creds->session.keytype)
1132 options |= KRB5_TC_MATCH_KEYTYPE;
1133
1134 /*
1135 * If we got a credential, check if credential is expired before
1136 * returning it.
1137 */
1138 ret = krb5_cc_retrieve_cred(context,
1139 ccache,
1140 in_creds->session.keytype ?
1141 KRB5_TC_MATCH_KEYTYPE : 0,
1142 in_creds, res_creds);
1143 /*
1144 * If we got a credential, check if credential is expired before
1145 * returning it, but only if KRB5_GC_EXPIRED_OK is not set.
1146 */
1147 if (ret == 0) {
1148 krb5_timestamp timeret;
1149
1150 /* If expired ok, don't bother checking */
1151 if(options & KRB5_GC_EXPIRED_OK) {
1152 *out_creds = res_creds;
1153 return 0;
1154 }
1155
1156 krb5_timeofday(context, &timeret);
1157 if(res_creds->times.endtime > timeret) {
1158 *out_creds = res_creds;
1159 return 0;
1160 }
1161 if(options & KRB5_GC_CACHED)
1162 krb5_cc_remove_cred(context, ccache, 0, res_creds);
1163
1164 } else if(ret != KRB5_CC_END) {
1165 free(res_creds);
1166 return ret;
1167 }
1168 free(res_creds);
1169 if(options & KRB5_GC_CACHED)
1170 return not_found(context, in_creds->server, KRB5_CC_NOTFOUND);
1171
1172 if(options & KRB5_GC_USER_USER)
1173 flags.b.enc_tkt_in_skey = 1;
1174 if (flags.b.enc_tkt_in_skey)
1175 options |= KRB5_GC_NO_STORE;
1176
1177 tgts = NULL;
1178 ret = _krb5_get_cred_kdc_any(context, flags, ccache,
1179 in_creds, NULL, NULL, out_creds, &tgts);
1180 for(i = 0; tgts && tgts[i]; i++) {
1181 krb5_cc_store_cred(context, ccache, tgts[i]);
1182 krb5_free_creds(context, tgts[i]);
1183 }
1184 free(tgts);
1185 if(ret == 0 && (options & KRB5_GC_NO_STORE) == 0)
1186 krb5_cc_store_cred(context, ccache, *out_creds);
1187 return ret;
1188 }
1189
1190 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1191 krb5_get_credentials(krb5_context context,
1192 krb5_flags options,
1193 krb5_ccache ccache,
1194 krb5_creds *in_creds,
1195 krb5_creds **out_creds)
1196 {
1197 krb5_kdc_flags flags;
1198 flags.i = 0;
1199 return krb5_get_credentials_with_flags(context, options, flags,
1200 ccache, in_creds, out_creds);
1201 }
1202
1203 struct krb5_get_creds_opt_data {
1204 krb5_principal self;
1205 krb5_flags options;
1206 krb5_enctype enctype;
1207 Ticket *ticket;
1208 };
1209
1210
1211 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1212 krb5_get_creds_opt_alloc(krb5_context context, krb5_get_creds_opt *opt)
1213 {
1214 *opt = calloc(1, sizeof(**opt));
1215 if (*opt == NULL) {
1216 krb5_set_error_message(context, ENOMEM,
1217 N_("malloc: out of memory", ""));
1218 return ENOMEM;
1219 }
1220 return 0;
1221 }
1222
1223 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
1224 krb5_get_creds_opt_free(krb5_context context, krb5_get_creds_opt opt)
1225 {
1226 if (opt->self)
1227 krb5_free_principal(context, opt->self);
1228 if (opt->ticket) {
1229 free_Ticket(opt->ticket);
1230 free(opt->ticket);
1231 }
1232 memset(opt, 0, sizeof(*opt));
1233 free(opt);
1234 }
1235
1236 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
1237 krb5_get_creds_opt_set_options(krb5_context context,
1238 krb5_get_creds_opt opt,
1239 krb5_flags options)
1240 {
1241 opt->options = options;
1242 }
1243
1244 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
1245 krb5_get_creds_opt_add_options(krb5_context context,
1246 krb5_get_creds_opt opt,
1247 krb5_flags options)
1248 {
1249 opt->options |= options;
1250 }
1251
1252 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
1253 krb5_get_creds_opt_set_enctype(krb5_context context,
1254 krb5_get_creds_opt opt,
1255 krb5_enctype enctype)
1256 {
1257 opt->enctype = enctype;
1258 }
1259
1260 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1261 krb5_get_creds_opt_set_impersonate(krb5_context context,
1262 krb5_get_creds_opt opt,
1263 krb5_const_principal self)
1264 {
1265 if (opt->self)
1266 krb5_free_principal(context, opt->self);
1267 return krb5_copy_principal(context, self, &opt->self);
1268 }
1269
1270 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1271 krb5_get_creds_opt_set_ticket(krb5_context context,
1272 krb5_get_creds_opt opt,
1273 const Ticket *ticket)
1274 {
1275 if (opt->ticket) {
1276 free_Ticket(opt->ticket);
1277 free(opt->ticket);
1278 opt->ticket = NULL;
1279 }
1280 if (ticket) {
1281 krb5_error_code ret;
1282
1283 opt->ticket = malloc(sizeof(*ticket));
1284 if (opt->ticket == NULL) {
1285 krb5_set_error_message(context, ENOMEM,
1286 N_("malloc: out of memory", ""));
1287 return ENOMEM;
1288 }
1289 ret = copy_Ticket(ticket, opt->ticket);
1290 if (ret) {
1291 free(opt->ticket);
1292 opt->ticket = NULL;
1293 krb5_set_error_message(context, ret,
1294 N_("malloc: out of memory", ""));
1295 return ret;
1296 }
1297 }
1298 return 0;
1299 }
1300
1301
1302
1303 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1304 krb5_get_creds(krb5_context context,
1305 krb5_get_creds_opt opt,
1306 krb5_ccache ccache,
1307 krb5_const_principal inprinc,
1308 krb5_creds **out_creds)
1309 {
1310 krb5_kdc_flags flags;
1311 krb5_flags options;
1312 krb5_creds in_creds;
1313 krb5_error_code ret;
1314 krb5_creds **tgts;
1315 krb5_creds *res_creds;
1316 int i;
1317
1318 if (opt && opt->enctype) {
1319 ret = krb5_enctype_valid(context, opt->enctype);
1320 if (ret)
1321 return ret;
1322 }
1323
1324 memset(&in_creds, 0, sizeof(in_creds));
1325 in_creds.server = rk_UNCONST(inprinc);
1326
1327 ret = krb5_cc_get_principal(context, ccache, &in_creds.client);
1328 if (ret)
1329 return ret;
1330
1331 if (opt)
1332 options = opt->options;
1333 else
1334 options = 0;
1335 flags.i = 0;
1336
1337 *out_creds = NULL;
1338 res_creds = calloc(1, sizeof(*res_creds));
1339 if (res_creds == NULL) {
1340 krb5_free_principal(context, in_creds.client);
1341 krb5_set_error_message(context, ENOMEM,
1342 N_("malloc: out of memory", ""));
1343 return ENOMEM;
1344 }
1345
1346 if (opt && opt->enctype) {
1347 in_creds.session.keytype = opt->enctype;
1348 options |= KRB5_TC_MATCH_KEYTYPE;
1349 }
1350
1351 /*
1352 * If we got a credential, check if credential is expired before
1353 * returning it.
1354 */
1355 ret = krb5_cc_retrieve_cred(context,
1356 ccache,
1357 options & KRB5_TC_MATCH_KEYTYPE,
1358 &in_creds, res_creds);
1359 /*
1360 * If we got a credential, check if credential is expired before
1361 * returning it, but only if KRB5_GC_EXPIRED_OK is not set.
1362 */
1363 if (ret == 0) {
1364 krb5_timestamp timeret;
1365
1366 /* If expired ok, don't bother checking */
1367 if(options & KRB5_GC_EXPIRED_OK) {
1368 *out_creds = res_creds;
1369 krb5_free_principal(context, in_creds.client);
1370 goto out;
1371 }
1372
1373 krb5_timeofday(context, &timeret);
1374 if(res_creds->times.endtime > timeret) {
1375 *out_creds = res_creds;
1376 krb5_free_principal(context, in_creds.client);
1377 goto out;
1378 }
1379 if(options & KRB5_GC_CACHED)
1380 krb5_cc_remove_cred(context, ccache, 0, res_creds);
1381
1382 } else if(ret != KRB5_CC_END) {
1383 free(res_creds);
1384 krb5_free_principal(context, in_creds.client);
1385 goto out;
1386 }
1387 free(res_creds);
1388 if(options & KRB5_GC_CACHED) {
1389 krb5_free_principal(context, in_creds.client);
1390 ret = not_found(context, in_creds.server, KRB5_CC_NOTFOUND);
1391 goto out;
1392 }
1393 if(options & KRB5_GC_USER_USER) {
1394 flags.b.enc_tkt_in_skey = 1;
1395 options |= KRB5_GC_NO_STORE;
1396 }
1397 if (options & KRB5_GC_FORWARDABLE)
1398 flags.b.forwardable = 1;
1399 if (options & KRB5_GC_NO_TRANSIT_CHECK)
1400 flags.b.disable_transited_check = 1;
1401 if (options & KRB5_GC_CONSTRAINED_DELEGATION) {
1402 flags.b.request_anonymous = 1; /* XXX ARGH confusion */
1403 flags.b.constrained_delegation = 1;
1404 }
1405 if (options & KRB5_GC_CANONICALIZE)
1406 flags.b.canonicalize = 1;
1407
1408 tgts = NULL;
1409 ret = _krb5_get_cred_kdc_any(context, flags, ccache,
1410 &in_creds, opt->self, opt->ticket,
1411 out_creds, &tgts);
1412 krb5_free_principal(context, in_creds.client);
1413 for(i = 0; tgts && tgts[i]; i++) {
1414 krb5_cc_store_cred(context, ccache, tgts[i]);
1415 krb5_free_creds(context, tgts[i]);
1416 }
1417 free(tgts);
1418 if(ret == 0 && (options & KRB5_GC_NO_STORE) == 0)
1419 krb5_cc_store_cred(context, ccache, *out_creds);
1420
1421 out:
1422 _krb5_debug(context, 5, "krb5_get_creds: ret = %d", ret);
1423
1424 return ret;
1425 }
1426
1427 /*
1428 *
1429 */
1430
1431 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1432 krb5_get_renewed_creds(krb5_context context,
1433 krb5_creds *creds,
1434 krb5_const_principal client,
1435 krb5_ccache ccache,
1436 const char *in_tkt_service)
1437 {
1438 krb5_error_code ret;
1439 krb5_kdc_flags flags;
1440 krb5_creds in, *template, *out = NULL;
1441
1442 memset(&in, 0, sizeof(in));
1443 memset(creds, 0, sizeof(*creds));
1444
1445 ret = krb5_copy_principal(context, client, &in.client);
1446 if (ret)
1447 return ret;
1448
1449 if (in_tkt_service) {
1450 ret = krb5_parse_name(context, in_tkt_service, &in.server);
1451 if (ret) {
1452 krb5_free_principal(context, in.client);
1453 return ret;
1454 }
1455 } else {
1456 const char *realm = krb5_principal_get_realm(context, client);
1457
1458 ret = krb5_make_principal(context, &in.server, realm, KRB5_TGS_NAME,
1459 realm, NULL);
1460 if (ret) {
1461 krb5_free_principal(context, in.client);
1462 return ret;
1463 }
1464 }
1465
1466 flags.i = 0;
1467 flags.b.renewable = flags.b.renew = 1;
1468
1469 /*
1470 * Get template from old credential cache for the same entry, if
1471 * this failes, no worries.
1472 */
1473 ret = krb5_get_credentials(context, KRB5_GC_CACHED, ccache, &in, &template);
1474 if (ret == 0) {
1475 flags.b.forwardable = template->flags.b.forwardable;
1476 flags.b.proxiable = template->flags.b.proxiable;
1477 krb5_free_creds (context, template);
1478 }
1479
1480 ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &in, &out);
1481 krb5_free_principal(context, in.client);
1482 krb5_free_principal(context, in.server);
1483 if (ret)
1484 return ret;
1485
1486 ret = krb5_copy_creds_contents(context, out, creds);
1487 krb5_free_creds(context, out);
1488
1489 return ret;
1490 }
Heimdal