Line data Source code
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 - 2010 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, struct krb5_fast_state *,
42 : krb5_creds *, krb5_principal,
43 : Ticket *, const char *, const char *,
44 : krb5_creds **, krb5_creds ***);
45 :
46 : /*
47 : * Take the `body' and encode it into `padata' using the credentials
48 : * in `creds'.
49 : */
50 :
51 : static krb5_error_code
52 35909 : make_pa_tgs_req(krb5_context context,
53 : krb5_auth_context *ac,
54 : KDC_REQ_BODY *body,
55 : krb5_ccache ccache,
56 : krb5_creds *creds,
57 : krb5_data *tgs_req)
58 : {
59 : krb5_error_code ret;
60 : krb5_data in_data;
61 : size_t buf_size;
62 35909 : size_t len = 0;
63 : uint8_t *buf;
64 :
65 35909 : ASN1_MALLOC_ENCODE(KDC_REQ_BODY, buf, buf_size, body, &len, ret);
66 35909 : if (ret)
67 0 : return ret;
68 :
69 35909 : if(buf_size != len)
70 0 : krb5_abortx(context, "internal error in ASN.1 encoder");
71 :
72 35909 : in_data.length = len;
73 35909 : in_data.data = buf;
74 35909 : ret = _krb5_mk_req_internal(context, ac, 0, &in_data,
75 : creds, tgs_req,
76 : KRB5_KU_TGS_REQ_AUTH_CKSUM,
77 : KRB5_KU_TGS_REQ_AUTH);
78 35909 : free (buf);
79 35909 : return ret;
80 : }
81 :
82 : /*
83 : * Set the `enc-authorization-data' in `req_body' based on `authdata'
84 : */
85 :
86 : static krb5_error_code
87 35909 : set_auth_data (krb5_context context,
88 : KDC_REQ_BODY *req_body,
89 : krb5_authdata *authdata,
90 : krb5_keyblock *subkey)
91 : {
92 35909 : if(authdata->len) {
93 0 : size_t len = 0, buf_size;
94 : unsigned char *buf;
95 : krb5_crypto crypto;
96 : krb5_error_code ret;
97 :
98 0 : ASN1_MALLOC_ENCODE(AuthorizationData, buf, buf_size, authdata,
99 : &len, ret);
100 0 : if (ret)
101 0 : return ret;
102 0 : if (buf_size != len)
103 0 : krb5_abortx(context, "internal error in ASN.1 encoder");
104 :
105 0 : ALLOC(req_body->enc_authorization_data, 1);
106 0 : if (req_body->enc_authorization_data == NULL) {
107 0 : free (buf);
108 0 : return krb5_enomem(context);
109 : }
110 0 : ret = krb5_crypto_init(context, subkey, 0, &crypto);
111 0 : if (ret) {
112 0 : free (buf);
113 0 : free (req_body->enc_authorization_data);
114 0 : req_body->enc_authorization_data = NULL;
115 0 : return ret;
116 : }
117 0 : ret = krb5_encrypt_EncryptedData(context,
118 : crypto,
119 : KRB5_KU_TGS_REQ_AUTH_DAT_SUBKEY,
120 : buf,
121 : len,
122 : 0,
123 : req_body->enc_authorization_data);
124 0 : free (buf);
125 0 : krb5_crypto_destroy(context, crypto);
126 0 : return ret;
127 : } else {
128 35909 : req_body->enc_authorization_data = NULL;
129 35909 : return 0;
130 : }
131 : }
132 :
133 : /*
134 : * Create a tgs-req in `t' with `addresses', `flags', `second_ticket'
135 : * (if not-NULL), `in_creds', `krbtgt', and returning the generated
136 : * subkey in `subkey'.
137 : */
138 :
139 : static krb5_error_code
140 35909 : init_tgs_req (krb5_context context,
141 : krb5_ccache ccache,
142 : struct krb5_fast_state *state,
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 35909 : krb5_auth_context ac = NULL;
154 35909 : krb5_error_code ret = 0;
155 : krb5_data tgs_req;
156 :
157 35909 : krb5_data_zero(&tgs_req);
158 35909 : memset(t, 0, sizeof(*t));
159 :
160 35909 : t->pvno = 5;
161 35909 : t->msg_type = krb_tgs_req;
162 35909 : if (in_creds->session.keytype) {
163 0 : ALLOC_SEQ(&t->req_body.etype, 1);
164 0 : if(t->req_body.etype.val == NULL) {
165 0 : ret = krb5_enomem(context);
166 0 : goto fail;
167 : }
168 0 : t->req_body.etype.val[0] = in_creds->session.keytype;
169 : } else {
170 35909 : ret = _krb5_init_etype(context,
171 : KRB5_PDU_TGS_REQUEST,
172 : &t->req_body.etype.len,
173 35909 : &t->req_body.etype.val,
174 : NULL);
175 : }
176 35909 : if (ret)
177 0 : goto fail;
178 35909 : t->req_body.addresses = addresses;
179 35909 : t->req_body.kdc_options = flags.b;
180 35909 : t->req_body.kdc_options.forwardable = krbtgt->flags.b.forwardable;
181 35909 : t->req_body.kdc_options.renewable = krbtgt->flags.b.renewable;
182 35909 : t->req_body.kdc_options.proxiable = krbtgt->flags.b.proxiable;
183 35909 : ret = copy_Realm(&in_creds->server->realm, &t->req_body.realm);
184 35909 : if (ret)
185 0 : goto fail;
186 35909 : ALLOC(t->req_body.sname, 1);
187 35909 : if (t->req_body.sname == NULL) {
188 0 : ret = krb5_enomem(context);
189 0 : 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 35909 : ret = copy_PrincipalName(&in_creds->server->name, t->req_body.sname);
196 35909 : if (ret)
197 0 : goto fail;
198 :
199 35909 : if (krbtgt->times.starttime) {
200 35909 : ALLOC(t->req_body.from, 1);
201 35909 : if(t->req_body.from == NULL){
202 0 : ret = krb5_enomem(context);
203 0 : goto fail;
204 : }
205 35909 : *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 35909 : ALLOC(t->req_body.till, 1);
211 35909 : if(t->req_body.till == NULL){
212 0 : ret = krb5_enomem(context);
213 0 : goto fail;
214 : }
215 35909 : *t->req_body.till = in_creds->times.endtime;
216 :
217 35909 : if (t->req_body.kdc_options.renewable && krbtgt->times.renew_till) {
218 1828 : ALLOC(t->req_body.rtime, 1);
219 1828 : if(t->req_body.rtime == NULL){
220 0 : ret = krb5_enomem(context);
221 0 : goto fail;
222 : }
223 1828 : *t->req_body.rtime = in_creds->times.renew_till;
224 : }
225 :
226 35909 : t->req_body.nonce = nonce;
227 35909 : if(second_ticket){
228 18 : ALLOC(t->req_body.additional_tickets, 1);
229 18 : if (t->req_body.additional_tickets == NULL) {
230 0 : ret = krb5_enomem(context);
231 0 : goto fail;
232 : }
233 18 : ALLOC_SEQ(t->req_body.additional_tickets, 1);
234 18 : if (t->req_body.additional_tickets->val == NULL) {
235 0 : ret = krb5_enomem(context);
236 0 : goto fail;
237 : }
238 18 : ret = copy_Ticket(second_ticket, t->req_body.additional_tickets->val);
239 18 : if (ret)
240 0 : goto fail;
241 : }
242 :
243 35909 : ret = krb5_auth_con_init(context, &ac);
244 35909 : if(ret)
245 0 : goto fail;
246 :
247 35909 : ret = krb5_auth_con_generatelocalsubkey(context, ac, &krbtgt->session);
248 35909 : if (ret)
249 0 : goto fail;
250 :
251 35909 : if (state) {
252 : krb5_data empty;
253 :
254 35909 : krb5_data_zero(&empty);
255 35909 : ret = krb5_auth_con_add_AuthorizationData(context, ac,
256 : KRB5_AUTHDATA_FX_FAST_USED,
257 : &empty);
258 35909 : if (ret)
259 0 : goto fail;
260 : }
261 :
262 35909 : ret = set_auth_data(context, &t->req_body,
263 35909 : &in_creds->authdata, ac->local_subkey);
264 35909 : if (ret)
265 0 : goto fail;
266 :
267 35909 : ret = make_pa_tgs_req(context,
268 : &ac,
269 : &t->req_body,
270 : ccache,
271 : krbtgt,
272 : &tgs_req);
273 35909 : if(ret)
274 0 : goto fail;
275 :
276 : /*
277 : * Add KRB5_PADATA_TGS_REQ first
278 : * followed by all others.
279 : */
280 :
281 35909 : if (t->padata == NULL) {
282 35909 : ALLOC(t->padata, 1);
283 35909 : if (t->padata == NULL) {
284 0 : ret = krb5_enomem(context);
285 0 : goto fail;
286 : }
287 : }
288 :
289 35909 : ret = krb5_padata_add(context, t->padata, KRB5_PADATA_TGS_REQ,
290 : tgs_req.data, tgs_req.length);
291 35909 : if (ret)
292 0 : goto fail;
293 :
294 35909 : krb5_data_zero(&tgs_req);
295 :
296 : {
297 : size_t i;
298 73610 : for (i = 0; i < padata->len; i++) {
299 896 : const PA_DATA *val1 = &padata->val[i];
300 : PA_DATA val2;
301 :
302 896 : ret = copy_PA_DATA(val1, &val2);
303 896 : if (ret) {
304 0 : krb5_set_error_message(context, ret,
305 0 : N_("malloc: out of memory", ""));
306 0 : goto fail;
307 : }
308 :
309 1792 : ret = krb5_padata_add(context, t->padata,
310 896 : val2.padata_type,
311 : val2.padata_value.data,
312 : val2.padata_value.length);
313 896 : if (ret) {
314 0 : free_PA_DATA(&val2);
315 :
316 0 : krb5_set_error_message(context, ret,
317 0 : N_("malloc: out of memory", ""));
318 0 : goto fail;
319 : }
320 : }
321 : }
322 :
323 35909 : if (state) {
324 35909 : state->armor_ac = ac;
325 35909 : ret = _krb5_fast_create_armor(context, state, NULL);
326 35909 : state->armor_ac = NULL;
327 35909 : if (ret)
328 0 : goto fail;
329 :
330 35909 : ret = _krb5_fast_wrap_req(context, state, t);
331 35909 : if (ret)
332 0 : goto fail;
333 :
334 : /* Its ok if there is no fast in the TGS-REP, older heimdal only support it in the AS code path */
335 35909 : state->flags &= ~KRB5_FAST_EXPECTED;
336 : }
337 :
338 35909 : ret = krb5_auth_con_getlocalsubkey(context, ac, subkey);
339 35909 : if (ret)
340 0 : goto fail;
341 :
342 71818 : fail:
343 35909 : if (ac)
344 35909 : krb5_auth_con_free(context, ac);
345 35909 : if (ret) {
346 0 : t->req_body.addresses = NULL;
347 0 : free_TGS_REQ (t);
348 : }
349 35909 : krb5_data_free(&tgs_req);
350 :
351 35909 : return ret;
352 : }
353 :
354 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
355 18105 : _krb5_get_krbtgt(krb5_context context,
356 : krb5_ccache id,
357 : krb5_realm realm,
358 : krb5_creds **cred)
359 : {
360 : krb5_error_code ret;
361 : krb5_creds tmp_cred;
362 :
363 18105 : memset(&tmp_cred, 0, sizeof(tmp_cred));
364 :
365 18105 : ret = krb5_cc_get_principal(context, id, &tmp_cred.client);
366 18105 : if (ret)
367 0 : return ret;
368 :
369 18105 : if (realm == NULL)
370 0 : realm = tmp_cred.client->realm;
371 :
372 18105 : ret = krb5_make_principal(context,
373 : &tmp_cred.server,
374 : realm,
375 : KRB5_TGS_NAME,
376 : realm,
377 : NULL);
378 18105 : if(ret) {
379 0 : krb5_free_principal(context, tmp_cred.client);
380 0 : return ret;
381 : }
382 : /*
383 : * The forwardable TGT might not be the start TGT, in which case, it is
384 : * generally, but not always already cached. Just in case, get it again if
385 : * lost.
386 : */
387 18105 : ret = krb5_get_credentials(context,
388 : 0,
389 : id,
390 : &tmp_cred,
391 : cred);
392 18105 : krb5_free_principal(context, tmp_cred.client);
393 18105 : krb5_free_principal(context, tmp_cred.server);
394 18105 : if(ret)
395 6 : return ret;
396 18099 : return 0;
397 : }
398 :
399 : static krb5_error_code
400 34374 : fast_tgs_strengthen_key(krb5_context context,
401 : struct krb5_fast_state *state,
402 : krb5_keyblock *reply_key,
403 : krb5_keyblock *extract_key)
404 : {
405 : krb5_error_code ret;
406 :
407 34374 : if (state && state->strengthen_key) {
408 30827 : _krb5_debug(context, 5, "_krb5_fast_tgs_strengthen_key");
409 :
410 30827 : if (state->strengthen_key->keytype != reply_key->keytype) {
411 0 : krb5_set_error_message(context, KRB5KRB_AP_ERR_MODIFIED,
412 0 : N_("strengthen_key %d not same enctype as reply key %d", ""),
413 0 : state->strengthen_key->keytype, reply_key->keytype);
414 0 : return KRB5KRB_AP_ERR_MODIFIED;
415 : }
416 :
417 30827 : ret = _krb5_fast_cf2(context,
418 : state->strengthen_key,
419 : "strengthenkey",
420 : reply_key,
421 : "replykey",
422 : extract_key,
423 : NULL);
424 61654 : if (ret)
425 0 : return ret;
426 : } else {
427 3547 : ret = krb5_copy_keyblock_contents(context, reply_key, extract_key);
428 3547 : if (ret)
429 0 : return ret;
430 : }
431 :
432 34374 : return 0;
433 : }
434 :
435 : /* DCE compatible decrypt proc */
436 : static krb5_error_code KRB5_CALLCONV
437 34374 : decrypt_tkt_with_subkey (krb5_context context,
438 : krb5_keyblock *key,
439 : krb5_key_usage usage,
440 : krb5_const_pointer skey,
441 : krb5_kdc_rep *dec_rep)
442 : {
443 : struct krb5_decrypt_tkt_with_subkey_state *state;
444 34374 : krb5_error_code ret = 0;
445 : krb5_data data;
446 : size_t size;
447 : krb5_crypto crypto;
448 : krb5_keyblock extract_key;
449 :
450 34374 : state = (struct krb5_decrypt_tkt_with_subkey_state *)skey;
451 :
452 34374 : assert(usage == 0);
453 :
454 34374 : krb5_data_zero(&data);
455 :
456 : /*
457 : * start out with trying with subkey if we have one
458 : */
459 34374 : if (state->subkey) {
460 34374 : ret = fast_tgs_strengthen_key(context, state->fast_state,
461 : state->subkey, &extract_key);
462 34374 : if (ret)
463 0 : return ret;
464 :
465 34374 : ret = krb5_crypto_init(context, &extract_key, 0, &crypto);
466 34374 : krb5_free_keyblock_contents(context, &extract_key);
467 34374 : if (ret)
468 0 : return ret;
469 34374 : ret = krb5_decrypt_EncryptedData (context,
470 : crypto,
471 : KRB5_KU_TGS_REP_ENC_PART_SUB_KEY,
472 34374 : &dec_rep->kdc_rep.enc_part,
473 : &data);
474 : /*
475 : * If the is Windows 2000 DC, we need to retry with key usage
476 : * 8 when doing ARCFOUR.
477 : */
478 34374 : if (ret && state->subkey->keytype == ETYPE_ARCFOUR_HMAC_MD5) {
479 0 : ret = krb5_decrypt_EncryptedData(context,
480 : crypto,
481 : 8,
482 0 : &dec_rep->kdc_rep.enc_part,
483 : &data);
484 : }
485 34374 : krb5_crypto_destroy(context, crypto);
486 : }
487 34374 : if (state->subkey == NULL || ret) {
488 0 : ret = fast_tgs_strengthen_key(context, state->fast_state, key, &extract_key);
489 0 : if (ret)
490 0 : return ret;
491 :
492 0 : ret = krb5_crypto_init(context, key, 0, &crypto);
493 0 : if (ret)
494 0 : return ret;
495 0 : ret = krb5_decrypt_EncryptedData (context,
496 : crypto,
497 : KRB5_KU_TGS_REP_ENC_PART_SESSION,
498 0 : &dec_rep->kdc_rep.enc_part,
499 : &data);
500 0 : krb5_crypto_destroy(context, crypto);
501 : }
502 34374 : if (ret)
503 0 : return ret;
504 :
505 34374 : ret = decode_EncASRepPart(data.data,
506 : data.length,
507 34374 : &dec_rep->enc_part,
508 : &size);
509 34374 : if (ret)
510 34374 : ret = decode_EncTGSRepPart(data.data,
511 : data.length,
512 34374 : &dec_rep->enc_part,
513 : &size);
514 34374 : if (ret)
515 0 : krb5_set_error_message(context, ret,
516 0 : N_("Failed to decode encpart in ticket", ""));
517 34374 : krb5_data_free (&data);
518 34374 : return ret;
519 : }
520 :
521 : static krb5_error_code
522 35909 : get_cred_kdc(krb5_context context,
523 : krb5_ccache id,
524 : struct krb5_fast_state *fast_state,
525 : krb5_kdc_flags flags,
526 : krb5_addresses *addresses,
527 : krb5_creds *in_creds,
528 : krb5_creds *krbtgt,
529 : krb5_principal impersonate_principal,
530 : Ticket *second_ticket,
531 : const char *kdc_hostname,
532 : const char *sitename,
533 : krb5_creds *out_creds)
534 : {
535 : TGS_REQ req;
536 : krb5_data enc;
537 : krb5_data resp;
538 : krb5_kdc_rep rep;
539 : krb5_error_code ret;
540 : unsigned nonce;
541 35909 : krb5_keyblock *subkey = NULL;
542 35909 : size_t len = 0;
543 : Ticket second_ticket_data;
544 : METHOD_DATA padata;
545 :
546 35909 : memset(&rep, 0, sizeof(rep));
547 35909 : krb5_data_zero(&resp);
548 35909 : krb5_data_zero(&enc);
549 35909 : padata.val = NULL;
550 35909 : padata.len = 0;
551 :
552 35909 : krb5_generate_random_block(&nonce, sizeof(nonce));
553 35909 : nonce &= 0xffffffff;
554 :
555 35909 : if(flags.b.enc_tkt_in_skey && second_ticket == NULL){
556 0 : ret = decode_Ticket(in_creds->second_ticket.data,
557 : in_creds->second_ticket.length,
558 : &second_ticket_data, &len);
559 0 : if(ret)
560 0 : return ret;
561 0 : second_ticket = &second_ticket_data;
562 : }
563 :
564 :
565 35909 : if (impersonate_principal) {
566 : krb5_crypto crypto;
567 : PA_S4U2Self self;
568 : krb5_data data;
569 : void *buf;
570 896 : size_t size = 0;
571 :
572 896 : self.name = impersonate_principal->name;
573 896 : self.realm = impersonate_principal->realm;
574 896 : self.auth = estrdup("Kerberos");
575 :
576 896 : ret = _krb5_s4u2self_to_checksumdata(context, &self, &data);
577 896 : if (ret) {
578 0 : free(self.auth);
579 0 : goto out;
580 : }
581 :
582 896 : ret = krb5_crypto_init(context, &krbtgt->session, 0, &crypto);
583 896 : if (ret) {
584 0 : free(self.auth);
585 0 : krb5_data_free(&data);
586 0 : goto out;
587 : }
588 :
589 896 : ret = krb5_create_checksum(context,
590 : crypto,
591 : KRB5_KU_OTHER_CKSUM,
592 : 0,
593 : data.data,
594 : data.length,
595 : &self.cksum);
596 896 : krb5_crypto_destroy(context, crypto);
597 896 : krb5_data_free(&data);
598 896 : if (ret) {
599 0 : free(self.auth);
600 0 : goto out;
601 : }
602 :
603 896 : ASN1_MALLOC_ENCODE(PA_S4U2Self, buf, len, &self, &size, ret);
604 896 : free(self.auth);
605 896 : free_Checksum(&self.cksum);
606 896 : if (ret)
607 0 : goto out;
608 896 : if (len != size)
609 0 : krb5_abortx(context, "internal asn1 error");
610 :
611 896 : ret = krb5_padata_add(context, &padata, KRB5_PADATA_FOR_USER, buf, len);
612 896 : if (ret)
613 0 : goto out;
614 : }
615 :
616 35909 : ret = init_tgs_req (context,
617 : id,
618 : fast_state,
619 : addresses,
620 : flags,
621 : second_ticket,
622 : in_creds,
623 : krbtgt,
624 : nonce,
625 : &padata,
626 : &subkey,
627 : &req);
628 35909 : if (ret)
629 0 : goto out;
630 :
631 35909 : ASN1_MALLOC_ENCODE(TGS_REQ, enc.data, enc.length, &req, &len, ret);
632 35909 : if (ret)
633 0 : goto out;
634 35909 : if(enc.length != len)
635 0 : krb5_abortx(context, "internal error in ASN.1 encoder");
636 :
637 : /* don't free addresses */
638 35909 : req.req_body.addresses = NULL;
639 35909 : free_TGS_REQ(&req);
640 :
641 : /*
642 : * Send and receive
643 : */
644 : {
645 : krb5_sendto_ctx stctx;
646 35909 : ret = krb5_sendto_ctx_alloc(context, &stctx);
647 35909 : if (ret)
648 0 : return ret;
649 35909 : krb5_sendto_ctx_set_func(stctx, _krb5_kdc_retry, NULL);
650 :
651 35909 : if (kdc_hostname)
652 0 : krb5_sendto_set_hostname(context, stctx, kdc_hostname);
653 35909 : if (sitename)
654 0 : krb5_sendto_set_sitename(context, stctx, sitename);
655 :
656 35909 : ret = krb5_sendto_context (context, stctx, &enc,
657 35909 : krbtgt->server->name.name_string.val[1],
658 : &resp);
659 35909 : krb5_sendto_ctx_free(context, stctx);
660 : }
661 35909 : if(ret)
662 288 : goto out;
663 :
664 35621 : if(decode_TGS_REP(resp.data, resp.length, &rep.kdc_rep, &len) == 0) {
665 : struct krb5_decrypt_tkt_with_subkey_state state;
666 34374 : unsigned eflags = 0;
667 : krb5_data data;
668 : size_t size;
669 :
670 34374 : ASN1_MALLOC_ENCODE(Ticket, data.data, data.length,
671 : &rep.kdc_rep.ticket, &size, ret);
672 34374 : if (ret)
673 0 : goto out;
674 34374 : heim_assert(data.length == size, "ASN.1 internal error");
675 :
676 34374 : ret = _krb5_fast_unwrap_kdc_rep(context, nonce, &data,
677 : fast_state, &rep.kdc_rep);
678 34374 : krb5_data_free(&data);
679 34374 : if (ret)
680 0 : goto out;
681 :
682 68748 : ret = krb5_copy_principal(context,
683 34374 : in_creds->client,
684 : &out_creds->client);
685 34374 : if(ret)
686 0 : goto out;
687 68748 : ret = krb5_copy_principal(context,
688 34374 : in_creds->server,
689 : &out_creds->server);
690 34374 : if(ret)
691 0 : goto out;
692 : /* this should go someplace else */
693 34374 : out_creds->times.endtime = in_creds->times.endtime;
694 :
695 : /* XXX should do better testing */
696 34374 : if (flags.b.cname_in_addl_tkt || impersonate_principal)
697 622 : eflags |= EXTRACT_TICKET_ALLOW_CNAME_MISMATCH;
698 34374 : if (flags.b.request_anonymous)
699 0 : eflags |= EXTRACT_TICKET_MATCH_ANON;
700 :
701 34374 : state.subkey = subkey;
702 34374 : state.fast_state = fast_state;
703 :
704 34374 : ret = _krb5_extract_ticket(context,
705 : &rep,
706 : out_creds,
707 : &krbtgt->session,
708 : NULL,
709 : 0,
710 : &krbtgt->addresses,
711 : nonce,
712 : eflags,
713 : NULL,
714 : decrypt_tkt_with_subkey,
715 : &state);
716 1247 : } else if(krb5_rd_error(context, &resp, &rep.error) == 0) {
717 : METHOD_DATA md;
718 :
719 1247 : memset(&md, 0, sizeof(md));
720 :
721 1247 : if (rep.error.e_data) {
722 1173 : ret = decode_METHOD_DATA(rep.error.e_data->data,
723 1173 : rep.error.e_data->length,
724 : &md, NULL);
725 1173 : if (ret) {
726 0 : krb5_set_error_message(context, ret,
727 0 : N_("Failed to decode METHOD-DATA", ""));
728 0 : goto out;
729 : }
730 : }
731 :
732 1247 : ret = _krb5_fast_unwrap_error(context, nonce, fast_state, &md, &rep.error);
733 1247 : free_METHOD_DATA(&md);
734 1247 : if (ret)
735 74 : goto out;
736 :
737 1173 : ret = krb5_error_from_rd_error(context, &rep.error, in_creds);
738 :
739 : /* log the failure */
740 1173 : if (_krb5_have_debug(context, 5)) {
741 0 : const char *str = krb5_get_error_message(context, ret);
742 0 : _krb5_debug(context, 5, "parse_tgs_rep: KRB-ERROR %d/%s", ret, str);
743 0 : krb5_free_error_message(context, str);
744 : }
745 0 : } else if(resp.length > 0 && ((char*)resp.data)[0] == 4) {
746 0 : ret = KRB5KRB_AP_ERR_V4_REPLY;
747 0 : krb5_clear_error_message(context);
748 : } else {
749 0 : ret = KRB5KRB_AP_ERR_MSG_TYPE;
750 0 : krb5_clear_error_message(context);
751 : }
752 :
753 35909 : out:
754 35909 : krb5_free_kdc_rep(context, &rep);
755 35909 : if (second_ticket == &second_ticket_data)
756 0 : free_Ticket(&second_ticket_data);
757 35909 : free_METHOD_DATA(&padata);
758 35909 : krb5_data_free(&resp);
759 35909 : krb5_data_free(&enc);
760 35909 : if(subkey)
761 35909 : krb5_free_keyblock(context, subkey);
762 35909 : return ret;
763 :
764 : }
765 :
766 : /*
767 : * same as above, just get local addresses first if the krbtgt have
768 : * them and the realm is not addressless
769 : */
770 :
771 : static krb5_error_code
772 18661 : get_cred_kdc_address(krb5_context context,
773 : krb5_ccache id,
774 : struct krb5_fast_state *fast_state,
775 : krb5_kdc_flags flags,
776 : krb5_addresses *addrs,
777 : krb5_creds *in_creds,
778 : krb5_creds *krbtgt,
779 : krb5_principal impersonate_principal,
780 : Ticket *second_ticket,
781 : const char *kdc_hostname,
782 : const char *sitename,
783 : krb5_creds *out_creds)
784 : {
785 : krb5_error_code ret;
786 18661 : krb5_addresses addresses = { 0, NULL };
787 :
788 : /*
789 : * Inherit the address-ness of the krbtgt if the address is not
790 : * specified.
791 : */
792 :
793 18661 : if (addrs == NULL && krbtgt->addresses.len != 0) {
794 : krb5_boolean noaddr;
795 :
796 0 : krb5_appdefault_boolean(context, NULL, krbtgt->server->realm,
797 : "no-addresses", FALSE, &noaddr);
798 :
799 0 : if (!noaddr) {
800 0 : ret = krb5_get_all_client_addrs(context, &addresses);
801 0 : if (ret)
802 0 : return ret;
803 : /* XXX this sucks. */
804 0 : addrs = &addresses;
805 0 : if(addresses.len == 0)
806 0 : addrs = NULL;
807 : }
808 : }
809 18661 : ret = get_cred_kdc(context, id, fast_state, flags, addrs,
810 : in_creds, krbtgt, impersonate_principal,
811 : second_ticket, kdc_hostname, sitename, out_creds);
812 18661 : krb5_free_addresses(context, &addresses);
813 18661 : return ret;
814 : }
815 :
816 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
817 17254 : krb5_get_kdc_cred(krb5_context context,
818 : krb5_ccache id,
819 : krb5_kdc_flags flags,
820 : krb5_addresses *addresses,
821 : Ticket *second_ticket,
822 : krb5_creds *in_creds,
823 : krb5_creds **out_creds
824 : )
825 : {
826 : krb5_error_code ret;
827 : krb5_creds *krbtgt;
828 : struct krb5_fast_state fast_state;
829 :
830 17254 : memset(&fast_state, 0, sizeof(fast_state));
831 :
832 17254 : *out_creds = calloc(1, sizeof(**out_creds));
833 17254 : if(*out_creds == NULL)
834 0 : return krb5_enomem(context);
835 17254 : ret = _krb5_get_krbtgt (context,
836 : id,
837 17254 : in_creds->server->realm,
838 : &krbtgt);
839 17254 : if(ret) {
840 6 : free(*out_creds);
841 6 : *out_creds = NULL;
842 6 : return ret;
843 : }
844 17248 : ret = get_cred_kdc(context, id, &fast_state, flags,
845 : addresses, in_creds, krbtgt,
846 : NULL, NULL, NULL, NULL, *out_creds);
847 17248 : krb5_free_creds (context, krbtgt);
848 17248 : _krb5_fast_free(context, &fast_state);
849 17248 : if(ret) {
850 153 : free(*out_creds);
851 153 : *out_creds = NULL;
852 : }
853 17248 : return ret;
854 : }
855 :
856 : static int
857 2563 : not_found(krb5_context context, krb5_const_principal p, krb5_error_code code)
858 : {
859 : krb5_error_code ret;
860 : char *str;
861 : const char *err;
862 :
863 2563 : ret = krb5_unparse_name(context, p, &str);
864 2563 : if(ret) {
865 0 : krb5_clear_error_message(context);
866 0 : return code;
867 : }
868 2563 : err = krb5_get_error_message(context, code);
869 2563 : krb5_set_error_message(context, code, N_("%s (%s)", ""), err, str);
870 2563 : krb5_free_error_message(context, err);
871 2563 : free(str);
872 2563 : return code;
873 : }
874 :
875 : static krb5_error_code
876 18421 : find_cred(krb5_context context,
877 : krb5_ccache id,
878 : krb5_principal server,
879 : krb5_creds **tgts,
880 : krb5_creds *out_creds)
881 : {
882 : krb5_error_code ret;
883 : krb5_creds mcreds;
884 :
885 18421 : krb5_cc_clear_mcred(&mcreds);
886 18421 : mcreds.server = server;
887 18421 : krb5_timeofday(context, &mcreds.times.endtime);
888 18421 : ret = krb5_cc_retrieve_cred(context, id,
889 : KRB5_TC_DONT_MATCH_REALM |
890 : KRB5_TC_MATCH_TIMES,
891 : &mcreds, out_creds);
892 18421 : if(ret == 0)
893 18291 : return 0;
894 260 : while(tgts && *tgts){
895 0 : if(krb5_compare_creds(context, KRB5_TC_DONT_MATCH_REALM,
896 : &mcreds, *tgts)){
897 0 : ret = krb5_copy_creds_contents(context, *tgts, out_creds);
898 0 : return ret;
899 : }
900 0 : tgts++;
901 : }
902 130 : return not_found(context, server, KRB5_CC_NOTFOUND);
903 : }
904 :
905 : static krb5_error_code
906 1810 : add_cred(krb5_context context, krb5_creds const *tkt, krb5_creds ***tgts)
907 : {
908 : int i;
909 : krb5_error_code ret;
910 1810 : krb5_creds **tmp = *tgts;
911 :
912 1810 : for(i = 0; tmp && tmp[i]; i++); /* XXX */
913 1810 : tmp = realloc(tmp, (i+2)*sizeof(*tmp));
914 1810 : if(tmp == NULL)
915 0 : return krb5_enomem(context);
916 1810 : *tgts = tmp;
917 1810 : ret = krb5_copy_creds(context, tkt, &tmp[i]);
918 1810 : tmp[i+1] = NULL;
919 1810 : return ret;
920 : }
921 :
922 : static krb5_error_code
923 16238 : get_cred_kdc_capath_worker(krb5_context context,
924 : krb5_kdc_flags flags,
925 : krb5_ccache ccache,
926 : struct krb5_fast_state *fast_state,
927 : krb5_creds *in_creds,
928 : krb5_const_realm try_realm,
929 : krb5_principal impersonate_principal,
930 : Ticket *second_ticket,
931 : const char *kdc_hostname,
932 : const char *sitename,
933 : krb5_creds **out_creds,
934 : krb5_creds ***ret_tgts)
935 : {
936 : krb5_error_code ret;
937 16238 : krb5_creds *tgt = NULL;
938 : krb5_creds tmp_creds;
939 : krb5_const_realm client_realm, server_realm;
940 16238 : int ok_as_delegate = 1;
941 :
942 16238 : *out_creds = calloc(1, sizeof(**out_creds));
943 16238 : if (*out_creds == NULL)
944 0 : return krb5_enomem(context);
945 :
946 16238 : memset(&tmp_creds, 0, sizeof(tmp_creds));
947 :
948 16238 : client_realm = krb5_principal_get_realm(context, in_creds->client);
949 16238 : server_realm = krb5_principal_get_realm(context, in_creds->server);
950 16238 : ret = krb5_copy_principal(context, in_creds->client, &tmp_creds.client);
951 16238 : if (ret)
952 0 : goto out;
953 :
954 16238 : ret = krb5_make_principal(context,
955 : &tmp_creds.server,
956 : try_realm,
957 : KRB5_TGS_NAME,
958 : server_realm,
959 : NULL);
960 16238 : if (ret)
961 0 : goto out;
962 :
963 : {
964 : krb5_creds tgts;
965 :
966 : /*
967 : * If we have krbtgt/server_realm@try_realm cached, use it and we're
968 : * done.
969 : */
970 16238 : ret = find_cred(context, ccache, tmp_creds.server,
971 : *ret_tgts, &tgts);
972 16238 : if (ret == 0) {
973 : /* only allow implicit ok_as_delegate if the realm is the clients realm */
974 16128 : if (strcmp(try_realm, client_realm) != 0
975 16128 : || strcmp(try_realm, server_realm) != 0) {
976 15 : ok_as_delegate = tgts.flags.b.ok_as_delegate;
977 : }
978 :
979 16128 : ret = get_cred_kdc_address(context, ccache, fast_state,
980 : flags, NULL,
981 : in_creds, &tgts,
982 : impersonate_principal,
983 : second_ticket,
984 : kdc_hostname,
985 : sitename,
986 : *out_creds);
987 16128 : krb5_free_cred_contents(context, &tgts);
988 31581 : if (ret == 0 &&
989 15453 : !krb5_principal_compare(context, in_creds->server,
990 15453 : (*out_creds)->server)) {
991 1728 : ret = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
992 : }
993 16128 : if (ret == 0 && ok_as_delegate == 0)
994 3 : (*out_creds)->flags.b.ok_as_delegate = 0;
995 :
996 16128 : goto out;
997 : }
998 : }
999 :
1000 110 : if (krb5_realm_compare(context, in_creds->client, in_creds->server)) {
1001 20 : ret = not_found(context, in_creds->server, KRB5_CC_NOTFOUND);
1002 20 : goto out;
1003 : }
1004 :
1005 : /*
1006 : * XXX This can loop forever, plus we recurse, so we can't just keep a
1007 : * count here. The count would have to get passed around by reference.
1008 : *
1009 : * The KDCs check for transit loops for us, and capath data is finite, so
1010 : * in fact we'll fall out of this loop at some point. We should do our own
1011 : * transit loop checking (like get_cred_kdc_referral()), and we should
1012 : * impose a max number of iterations altogether. But barring malicious or
1013 : * broken KDCs, this is good enough.
1014 : */
1015 0 : while (1) {
1016 : heim_general_string tgt_inst;
1017 :
1018 90 : ret = get_cred_kdc_capath(context, flags, ccache, fast_state,
1019 : &tmp_creds, NULL, NULL,
1020 : kdc_hostname, sitename,
1021 : &tgt, ret_tgts);
1022 90 : if (ret)
1023 8 : goto out;
1024 :
1025 : /*
1026 : * if either of the chain or the ok_as_delegate was stripped
1027 : * by the kdc, make sure we strip it too.
1028 : */
1029 82 : if (ok_as_delegate == 0 || tgt->flags.b.ok_as_delegate == 0) {
1030 82 : ok_as_delegate = 0;
1031 82 : tgt->flags.b.ok_as_delegate = 0;
1032 : }
1033 :
1034 82 : ret = add_cred(context, tgt, ret_tgts);
1035 82 : if (ret)
1036 0 : goto out;
1037 82 : tgt_inst = tgt->server->name.name_string.val[1];
1038 82 : if (strcmp(tgt_inst, server_realm) == 0)
1039 82 : break;
1040 0 : krb5_free_principal(context, tmp_creds.server);
1041 0 : tmp_creds.server = NULL;
1042 0 : ret = krb5_make_principal(context, &tmp_creds.server,
1043 : tgt_inst, KRB5_TGS_NAME, server_realm, NULL);
1044 0 : if (ret)
1045 0 : goto out;
1046 0 : ret = krb5_free_creds(context, tgt);
1047 0 : tgt = NULL;
1048 0 : if (ret)
1049 0 : goto out;
1050 : }
1051 :
1052 82 : ret = get_cred_kdc_address(context, ccache, fast_state, flags, NULL,
1053 : in_creds, tgt, impersonate_principal,
1054 : second_ticket, kdc_hostname, sitename, *out_creds);
1055 116 : if (ret == 0 &&
1056 34 : !krb5_principal_compare(context, in_creds->server,
1057 34 : (*out_creds)->server)) {
1058 0 : krb5_free_cred_contents(context, *out_creds);
1059 0 : ret = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
1060 : }
1061 116 : if (ret == 0 && ok_as_delegate == 0)
1062 34 : (*out_creds)->flags.b.ok_as_delegate = 0;
1063 :
1064 16286 : out:
1065 16238 : if (ret) {
1066 2479 : krb5_free_creds(context, *out_creds);
1067 2479 : *out_creds = NULL;
1068 : }
1069 16238 : if (tmp_creds.server)
1070 16238 : krb5_free_principal(context, tmp_creds.server);
1071 16238 : if (tmp_creds.client)
1072 16238 : krb5_free_principal(context, tmp_creds.client);
1073 16238 : if (tgt)
1074 82 : krb5_free_creds(context, tgt);
1075 16238 : return ret;
1076 : }
1077 :
1078 : /*
1079 : get_cred(server)
1080 : creds = cc_get_cred(server)
1081 : if(creds) return creds
1082 : tgt = cc_get_cred(krbtgt/server_realm@any_realm)
1083 : if(tgt)
1084 : return get_cred_tgt(server, tgt)
1085 : if(client_realm == server_realm)
1086 : return NULL
1087 : tgt = get_cred(krbtgt/server_realm@client_realm)
1088 : while(tgt_inst != server_realm)
1089 : tgt = get_cred(krbtgt/server_realm@tgt_inst)
1090 : return get_cred_tgt(server, tgt)
1091 : */
1092 :
1093 : static krb5_error_code
1094 16238 : get_cred_kdc_capath(krb5_context context,
1095 : krb5_kdc_flags flags,
1096 : krb5_ccache ccache,
1097 : struct krb5_fast_state *fast_state,
1098 : krb5_creds *in_creds,
1099 : krb5_principal impersonate_principal,
1100 : Ticket *second_ticket,
1101 : const char *kdc_hostname,
1102 : const char *sitename,
1103 : krb5_creds **out_creds,
1104 : krb5_creds ***ret_tgts)
1105 : {
1106 : krb5_error_code ret;
1107 : krb5_const_realm client_realm, server_realm, try_realm;
1108 :
1109 16238 : client_realm = krb5_principal_get_realm(context, in_creds->client);
1110 16238 : server_realm = krb5_principal_get_realm(context, in_creds->server);
1111 :
1112 16238 : try_realm = client_realm;
1113 16238 : ret = get_cred_kdc_capath_worker(context, flags, ccache, fast_state,
1114 : in_creds, try_realm, impersonate_principal,
1115 : second_ticket, kdc_hostname, sitename,
1116 : out_creds, ret_tgts);
1117 :
1118 16238 : if (ret == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN) {
1119 2432 : try_realm = krb5_config_get_string(context, NULL, "capaths",
1120 : client_realm, server_realm, NULL);
1121 :
1122 2432 : if (try_realm != NULL && strcmp(try_realm, client_realm) != 0) {
1123 0 : ret = get_cred_kdc_capath_worker(context, flags, ccache, fast_state,
1124 : in_creds, try_realm, impersonate_principal,
1125 : second_ticket, kdc_hostname, sitename,
1126 : out_creds, ret_tgts);
1127 : }
1128 : }
1129 :
1130 16238 : return ret;
1131 : }
1132 :
1133 4654 : static krb5_boolean skip_referrals(krb5_principal server,
1134 : krb5_kdc_flags *flags)
1135 : {
1136 4654 : return server->name.name_string.len < 2 && !flags->b.canonicalize;
1137 : }
1138 :
1139 : /*
1140 : * Get a service ticket from a KDC by chasing referrals from a start realm.
1141 : *
1142 : * All referral TGTs produced in the process are thrown away when we're done.
1143 : * We don't store them, and we don't allow other search mechanisms (capaths) to
1144 : * use referral TGTs produced here.
1145 : */
1146 : static krb5_error_code
1147 2183 : get_cred_kdc_referral(krb5_context context,
1148 : krb5_kdc_flags flags,
1149 : krb5_ccache ccache,
1150 : struct krb5_fast_state *fast_state,
1151 : krb5_creds *in_creds,
1152 : krb5_principal impersonate_principal,
1153 : Ticket *second_ticket,
1154 : const char *kdc_hostname,
1155 : const char *sitename,
1156 : krb5_creds **out_creds)
1157 : {
1158 2183 : krb5_realm start_realm = NULL;
1159 : krb5_data config_start_realm;
1160 : krb5_error_code ret;
1161 : krb5_creds tgt, referral, ticket;
1162 2183 : krb5_creds **referral_tgts = NULL; /* used for loop detection */
1163 2183 : int loop = 0;
1164 2183 : int ok_as_delegate = 1;
1165 : int want_tgt;
1166 : size_t i;
1167 :
1168 2183 : if (skip_referrals(in_creds->server, &flags)) {
1169 0 : krb5_set_error_message(context, KRB5KDC_ERR_PATH_NOT_ACCEPTED,
1170 0 : N_("Name too short to do referals, skipping", ""));
1171 0 : return KRB5KDC_ERR_PATH_NOT_ACCEPTED;
1172 : }
1173 :
1174 2183 : memset(&tgt, 0, sizeof(tgt));
1175 2183 : memset(&ticket, 0, sizeof(ticket));
1176 :
1177 2183 : flags.b.canonicalize = 1;
1178 :
1179 2183 : *out_creds = NULL;
1180 :
1181 :
1182 2183 : ret = krb5_cc_get_config(context, ccache, NULL, "start_realm", &config_start_realm);
1183 2183 : if (ret == 0) {
1184 2163 : start_realm = strndup(config_start_realm.data, config_start_realm.length);
1185 2163 : krb5_data_free(&config_start_realm);
1186 : } else {
1187 20 : start_realm = strdup(krb5_principal_get_realm(context, in_creds->client));
1188 : }
1189 2183 : if (start_realm == NULL)
1190 0 : return krb5_enomem(context);
1191 :
1192 : /* find tgt for the clients base realm */
1193 : {
1194 : krb5_principal tgtname;
1195 :
1196 2183 : ret = krb5_make_principal(context, &tgtname,
1197 : start_realm,
1198 : KRB5_TGS_NAME,
1199 : start_realm,
1200 : NULL);
1201 2183 : if (ret) {
1202 0 : free(start_realm);
1203 20 : return ret;
1204 : }
1205 :
1206 2183 : ret = find_cred(context, ccache, tgtname, NULL, &tgt);
1207 2183 : krb5_free_principal(context, tgtname);
1208 2183 : if (ret) {
1209 20 : free(start_realm);
1210 20 : return ret;
1211 : }
1212 : }
1213 :
1214 : /*
1215 : * If the desired service principal service/host@REALM is not a TGT, start
1216 : * by asking for a ticket for service/host@START_REALM and process referrals
1217 : * from there.
1218 : *
1219 : * However, when we ask for a TGT, krbtgt/A@B, we're actually looking for a
1220 : * path to realm B, so that we can explicitly obtain a ticket for krbtgt/A
1221 : * from B, and not some other realm. Therefore, in this case our starting
1222 : * point will be krbtgt/B@START_REALM. Only once we obtain a ticket for
1223 : * krbtgt/B@some-transit, do we switch to requesting krbtgt/A@B on our
1224 : * final request.
1225 : */
1226 2163 : referral = *in_creds;
1227 4326 : want_tgt = in_creds->server->realm[0] != '\0' &&
1228 2163 : krb5_principal_is_krbtgt(context, in_creds->server);
1229 2163 : if (!want_tgt)
1230 723 : ret = krb5_copy_principal(context, in_creds->server, &referral.server);
1231 : else
1232 1440 : ret = krb5_make_principal(context, &referral.server, start_realm,
1233 1440 : KRB5_TGS_NAME, in_creds->server->realm, NULL);
1234 :
1235 2163 : if (ret) {
1236 0 : krb5_free_cred_contents(context, &tgt);
1237 0 : free(start_realm);
1238 0 : return ret;
1239 : }
1240 2163 : if (!want_tgt)
1241 723 : ret = krb5_principal_set_realm(context, referral.server, start_realm);
1242 2163 : free(start_realm);
1243 2163 : start_realm = NULL;
1244 2163 : if (ret) {
1245 0 : krb5_free_cred_contents(context, &tgt);
1246 0 : krb5_free_principal(context, referral.server);
1247 0 : return ret;
1248 : }
1249 :
1250 6054 : while (loop++ < 17) {
1251 : krb5_creds **tickets;
1252 : krb5_creds mcreds;
1253 : char *referral_realm;
1254 :
1255 : /* Use cache if we are not doing impersonation or contrained deleg */
1256 3891 : if (impersonate_principal == NULL && !flags.b.cname_in_addl_tkt) {
1257 3745 : krb5_cc_clear_mcred(&mcreds);
1258 3745 : mcreds.server = referral.server;
1259 3745 : krb5_timeofday(context, &mcreds.times.endtime);
1260 3745 : ret = krb5_cc_retrieve_cred(context, ccache, KRB5_TC_MATCH_TIMES,
1261 : &mcreds, &ticket);
1262 : } else
1263 146 : ret = EINVAL;
1264 :
1265 3891 : if (ret) {
1266 2451 : ret = get_cred_kdc_address(context, ccache, fast_state, flags, NULL,
1267 : &referral, &tgt, impersonate_principal,
1268 : second_ticket, kdc_hostname, sitename, &ticket);
1269 2451 : if (ret)
1270 2758 : goto out;
1271 : }
1272 :
1273 : /*
1274 : * Did we get the right ticket?
1275 : *
1276 : * If we weren't asking for a TGT, then we don't mind if we took a realm
1277 : * change (referral.server has a referral realm, not necessarily the
1278 : * original).
1279 : *
1280 : * However, if we were looking for a TGT (which wouldn't be the start
1281 : * TGT, since that one must be in the ccache) then we actually want the
1282 : * one from the realm we wanted, since otherwise a _referral_ will
1283 : * confuse us and we will store that referral. In Heimdal we mostly
1284 : * never ask krb5_get_cred*() for TGTs, but some sites have code to ask
1285 : * for a ktbgt/REMOTE.REALM@REMOTE.REALM, and one could always use
1286 : * kgetcred(1) to get here asking for a krbtgt/C@D and we need to handle
1287 : * the case where last hop we get is krbtgt/C@B (in which case we must
1288 : * stop so we don't beat up on B for the remaining tries).
1289 : */
1290 5024 : if (!want_tgt &&
1291 1792 : krb5_principal_compare(context, referral.server, ticket.server))
1292 64 : break;
1293 :
1294 3168 : if (!krb5_principal_is_krbtgt(context, ticket.server)) {
1295 0 : krb5_set_error_message(context, KRB5KRB_AP_ERR_NOT_US,
1296 0 : N_("Got back an non krbtgt "
1297 : "ticket referrals", ""));
1298 0 : ret = KRB5KRB_AP_ERR_NOT_US;
1299 0 : goto out;
1300 : }
1301 :
1302 3168 : referral_realm = ticket.server->name.name_string.val[1];
1303 :
1304 : /* check that there are no referrals loops */
1305 3168 : tickets = referral_tgts;
1306 :
1307 3168 : krb5_cc_clear_mcred(&mcreds);
1308 3168 : mcreds.server = ticket.server;
1309 :
1310 6336 : while (tickets && *tickets){
1311 1440 : if (krb5_compare_creds(context,
1312 : KRB5_TC_DONT_MATCH_REALM,
1313 : &mcreds,
1314 : *tickets)) {
1315 2880 : krb5_set_error_message(context, KRB5_GET_IN_TKT_LOOP,
1316 1440 : N_("Referral from %s "
1317 : "loops back to realm %s", ""),
1318 1440 : tgt.server->realm,
1319 : referral_realm);
1320 1440 : ret = KRB5_GET_IN_TKT_LOOP;
1321 1440 : goto out;
1322 : }
1323 0 : tickets++;
1324 : }
1325 :
1326 : /*
1327 : * if either of the chain or the ok_as_delegate was stripped
1328 : * by the kdc, make sure we strip it too.
1329 : */
1330 :
1331 1728 : if (ok_as_delegate == 0 || ticket.flags.b.ok_as_delegate == 0) {
1332 1728 : ok_as_delegate = 0;
1333 1728 : ticket.flags.b.ok_as_delegate = 0;
1334 : }
1335 :
1336 1728 : _krb5_debug(context, 6, "get_cred_kdc_referral: got referral "
1337 1728 : "to %s from %s", referral_realm, referral.server->realm);
1338 1728 : ret = add_cred(context, &ticket, &referral_tgts);
1339 1728 : if (ret)
1340 0 : goto out;
1341 :
1342 : /* try realm in the referral */
1343 1728 : if (!want_tgt || strcmp(referral_realm, in_creds->server->realm) != 0)
1344 288 : ret = krb5_principal_set_realm(context,
1345 : referral.server,
1346 : referral_realm);
1347 : else {
1348 : /*
1349 : * Now that we have a ticket for the desired realm, we reset
1350 : * want_tgt and reinstate the desired principal so that the we can
1351 : * match it and break out of the loop.
1352 : */
1353 1440 : want_tgt = 0;
1354 1440 : krb5_free_principal(context, referral.server);
1355 1440 : referral.server = NULL;
1356 1440 : ret = krb5_copy_principal(context, in_creds->server, &referral.server);
1357 : }
1358 1728 : krb5_free_cred_contents(context, &tgt);
1359 1728 : tgt = ticket;
1360 1728 : memset(&ticket, 0, sizeof(ticket));
1361 1728 : if (ret)
1362 0 : goto out;
1363 : }
1364 :
1365 64 : ret = krb5_copy_creds(context, &ticket, out_creds);
1366 :
1367 2163 : out:
1368 3891 : for (i = 0; referral_tgts && referral_tgts[i]; i++)
1369 1728 : krb5_free_creds(context, referral_tgts[i]);
1370 2163 : free(referral_tgts);
1371 2163 : krb5_free_principal(context, referral.server);
1372 2163 : krb5_free_cred_contents(context, &tgt);
1373 2163 : krb5_free_cred_contents(context, &ticket);
1374 2163 : return ret;
1375 : }
1376 :
1377 :
1378 : /*
1379 : * Glue function between referrals version and old client chasing
1380 : * codebase.
1381 : */
1382 :
1383 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1384 16148 : _krb5_get_cred_kdc_any(krb5_context context,
1385 : krb5_kdc_flags flags,
1386 : krb5_ccache ccache,
1387 : struct krb5_fast_state *fast_state,
1388 : krb5_creds *in_creds,
1389 : krb5_principal impersonate_principal,
1390 : Ticket *second_ticket,
1391 : krb5_creds **out_creds,
1392 : krb5_creds ***ret_tgts)
1393 : {
1394 16148 : char *kdc_hostname = NULL;
1395 16148 : char *sitename = NULL;
1396 : krb5_error_code ret;
1397 : krb5_deltat offset;
1398 : krb5_data data;
1399 :
1400 16148 : krb5_data_zero(&data);
1401 :
1402 : /*
1403 : * If we are using LKDC, lets pull out the addreses from the
1404 : * ticket and use that.
1405 : */
1406 :
1407 16148 : ret = krb5_cc_get_config(context, ccache, NULL, "lkdc-hostname", &data);
1408 16148 : if (ret == 0) {
1409 0 : if ((kdc_hostname = strndup(data.data, data.length)) == NULL) {
1410 0 : ret = krb5_enomem(context);
1411 0 : goto out;
1412 : }
1413 0 : krb5_data_free(&data);
1414 : }
1415 :
1416 16148 : ret = krb5_cc_get_config(context, ccache, NULL, "sitename", &data);
1417 16148 : if (ret == 0) {
1418 0 : if ((sitename = strndup(data.data, data.length)) == NULL) {
1419 0 : ret = krb5_enomem(context);
1420 0 : goto out;
1421 : }
1422 0 : krb5_data_free(&data);
1423 : }
1424 :
1425 16148 : ret = krb5_cc_get_kdc_offset(context, ccache, &offset);
1426 16148 : if (ret == 0) {
1427 16148 : context->kdc_sec_offset = offset;
1428 16148 : context->kdc_usec_offset = 0;
1429 : }
1430 :
1431 16148 : if (strcmp(in_creds->server->realm, "") != 0) {
1432 : /*
1433 : * Non-empty realm? Try capaths first. We might have local
1434 : * policy (capaths) to honor.
1435 : */
1436 16148 : ret = get_cred_kdc_capath(context,
1437 : flags,
1438 : ccache,
1439 : fast_state,
1440 : in_creds,
1441 : impersonate_principal,
1442 : second_ticket,
1443 : kdc_hostname,
1444 : sitename,
1445 : out_creds,
1446 : ret_tgts);
1447 18619 : if (ret == 0 || skip_referrals(in_creds->server, &flags))
1448 : goto out;
1449 : }
1450 :
1451 : /* Otherwise try referrals */
1452 2183 : ret = get_cred_kdc_referral(context,
1453 : flags,
1454 : ccache,
1455 : fast_state,
1456 : in_creds,
1457 : impersonate_principal,
1458 : second_ticket,
1459 : kdc_hostname,
1460 : sitename,
1461 : out_creds);
1462 :
1463 30113 : out:
1464 16148 : krb5_data_free(&data);
1465 16148 : free(kdc_hostname);
1466 16148 : free(sitename);
1467 16148 : return ret;
1468 : }
1469 :
1470 : static krb5_error_code
1471 81195 : check_cc(krb5_context context, krb5_flags options, krb5_ccache ccache,
1472 : krb5_creds *in_creds, krb5_creds *out_creds)
1473 : {
1474 : krb5_error_code ret;
1475 : krb5_timestamp now;
1476 81195 : krb5_creds mcreds = *in_creds;
1477 :
1478 81195 : krb5_timeofday(context, &now);
1479 :
1480 162384 : if (!(options & KRB5_GC_EXPIRED_OK) &&
1481 81189 : mcreds.times.endtime < now) {
1482 81166 : mcreds.times.renew_till = 0;
1483 81166 : krb5_timeofday(context, &mcreds.times.endtime);
1484 81166 : options |= KRB5_TC_MATCH_TIMES;
1485 : }
1486 :
1487 81195 : if (mcreds.server->name.name_type == KRB5_NT_SRV_HST_NEEDS_CANON) {
1488 : /* Avoid name canonicalization in krb5_cc_retrieve_cred() */
1489 0 : krb5_principal_set_type(context, mcreds.server, KRB5_NT_SRV_HST);
1490 : }
1491 :
1492 81195 : if (options & KRB5_GC_ANONYMOUS) {
1493 0 : ret = krb5_make_principal(context,
1494 : &mcreds.client,
1495 0 : krb5_principal_get_realm(context, mcreds.client),
1496 : KRB5_WELLKNOWN_NAME,
1497 : KRB5_ANON_NAME,
1498 : NULL);
1499 0 : if (ret)
1500 0 : return ret;
1501 : }
1502 :
1503 81195 : ret = krb5_cc_retrieve_cred(context, ccache,
1504 : (options &
1505 : (KRB5_TC_DONT_MATCH_REALM |
1506 : KRB5_TC_MATCH_KEYTYPE |
1507 : KRB5_TC_MATCH_TIMES)),
1508 : &mcreds, out_creds);
1509 :
1510 81195 : if (options & KRB5_GC_ANONYMOUS)
1511 0 : krb5_free_principal(context, mcreds.client);
1512 :
1513 146252 : if (ret == 0 && out_creds->server->realm &&
1514 65057 : out_creds->server->realm[0] == '\0') {
1515 : Ticket ticket;
1516 :
1517 : /*
1518 : * We only write tickets to the ccache that have been validated, as in,
1519 : * the sname/srealm from the KDC-REP enc-part have been checked to
1520 : * match the sname/realm from the Ticket from the KDC-REP.
1521 : *
1522 : * Our caller needs the canonical realm of the service in order to be
1523 : * able to get forwarded credentials for it when destination-TGT
1524 : * forwarding is enabled.
1525 : *
1526 : * As well, gss_init_sec_context() ought to arrange for
1527 : * gss_inquire_context() to output the canonical acceptor name on the
1528 : * initiator side.
1529 : */
1530 0 : ret = decode_Ticket(out_creds->ticket.data, out_creds->ticket.length,
1531 : &ticket, NULL);
1532 0 : if (ret == 0) {
1533 0 : ret = krb5_principal_set_realm(context, out_creds->server,
1534 0 : ticket.realm);
1535 0 : free_Ticket(&ticket);
1536 : } else {
1537 0 : krb5_free_cred_contents(context, out_creds);
1538 : }
1539 : }
1540 81195 : return ret;
1541 : }
1542 :
1543 : static void
1544 12222 : store_cred(krb5_context context, krb5_ccache ccache,
1545 : krb5_const_principal server_princ, krb5_creds *creds)
1546 : {
1547 12222 : if (context->no_ticket_store)
1548 0 : return;
1549 12286 : if (!krb5_principal_compare(context, creds->server, server_princ) &&
1550 64 : !krb5_principal_is_krbtgt(context, server_princ)) {
1551 64 : krb5_principal tmp_princ = creds->server;
1552 : /*
1553 : * Store the cred with the pre-canon server princ first so it
1554 : * can be found quickly in the future.
1555 : */
1556 64 : creds->server = (krb5_principal)server_princ;
1557 64 : krb5_cc_store_cred(context, ccache, creds);
1558 64 : creds->server = tmp_princ;
1559 : /* Then store again with the canonicalized server princ */
1560 : }
1561 12222 : krb5_cc_store_cred(context, ccache, creds);
1562 : }
1563 :
1564 :
1565 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1566 77560 : krb5_get_credentials_with_flags(krb5_context context,
1567 : krb5_flags options,
1568 : krb5_kdc_flags flags,
1569 : krb5_ccache ccache,
1570 : krb5_creds *in_creds,
1571 : krb5_creds **out_creds)
1572 : {
1573 : struct krb5_fast_state fast_state;
1574 : krb5_error_code ret;
1575 77560 : krb5_name_canon_iterator name_canon_iter = NULL;
1576 : krb5_name_canon_rule_options rule_opts;
1577 77560 : krb5_const_principal try_princ = NULL;
1578 77560 : krb5_principal save_princ = in_creds->server;
1579 : krb5_creds **tgts;
1580 : krb5_creds *res_creds;
1581 : int i;
1582 :
1583 77560 : memset(&fast_state, 0, sizeof(fast_state));
1584 :
1585 77560 : if (_krb5_have_debug(context, 5)) {
1586 : char *unparsed;
1587 :
1588 0 : ret = krb5_unparse_name(context, in_creds->server, &unparsed);
1589 0 : if (ret) {
1590 0 : _krb5_debug(context, 5, "krb5_get_creds: unable to display "
1591 : "requested service principal");
1592 : } else {
1593 0 : _krb5_debug(context, 5, "krb5_get_creds: requesting a ticket "
1594 : "for %s", unparsed);
1595 0 : free(unparsed);
1596 : }
1597 : }
1598 :
1599 77560 : if (in_creds->session.keytype) {
1600 0 : ret = krb5_enctype_valid(context, in_creds->session.keytype);
1601 0 : if (ret)
1602 0 : return ret;
1603 0 : options |= KRB5_TC_MATCH_KEYTYPE;
1604 : }
1605 :
1606 77560 : *out_creds = NULL;
1607 77560 : res_creds = calloc(1, sizeof(*res_creds));
1608 77560 : if (res_creds == NULL)
1609 0 : return krb5_enomem(context);
1610 :
1611 77560 : ret = krb5_name_canon_iterator_start(context, in_creds->server,
1612 : &name_canon_iter);
1613 77560 : if (ret)
1614 0 : goto out;
1615 :
1616 77560 : next_rule:
1617 77860 : krb5_free_cred_contents(context, res_creds);
1618 77860 : memset(res_creds, 0, sizeof (*res_creds));
1619 77860 : ret = krb5_name_canon_iterate(context, &name_canon_iter, &try_princ,
1620 : &rule_opts);
1621 77860 : in_creds->server = rk_UNCONST(try_princ);
1622 77860 : if (ret)
1623 0 : goto out;
1624 :
1625 77860 : if (name_canon_iter == NULL) {
1626 300 : if (options & KRB5_GC_CACHED)
1627 6 : ret = KRB5_CC_NOTFOUND;
1628 : else
1629 294 : ret = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
1630 300 : goto out;
1631 : }
1632 :
1633 77560 : ret = check_cc(context, options, ccache, in_creds, res_creds);
1634 77560 : if (ret == 0) {
1635 65057 : *out_creds = res_creds;
1636 65057 : res_creds = NULL;
1637 65057 : goto out;
1638 12503 : } else if(ret != KRB5_CC_END) {
1639 0 : goto out;
1640 : }
1641 12503 : if (options & KRB5_GC_CACHED)
1642 6 : goto next_rule;
1643 :
1644 12497 : if(options & KRB5_GC_USER_USER)
1645 0 : flags.b.enc_tkt_in_skey = 1;
1646 12497 : if (flags.b.enc_tkt_in_skey)
1647 0 : options |= KRB5_GC_NO_STORE;
1648 :
1649 12497 : tgts = NULL;
1650 12497 : ret = _krb5_get_cred_kdc_any(context, flags, ccache, &fast_state,
1651 : in_creds, NULL, NULL, out_creds, &tgts);
1652 12578 : for (i = 0; tgts && tgts[i]; i++) {
1653 81 : if ((options & KRB5_GC_NO_STORE) == 0)
1654 81 : krb5_cc_store_cred(context, ccache, tgts[i]);
1655 81 : krb5_free_creds(context, tgts[i]);
1656 : }
1657 12497 : free(tgts);
1658 :
1659 : /* We don't yet have TGS w/ FAST, so we can't protect KBR-ERRORs */
1660 12791 : if (ret == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN &&
1661 294 : !(rule_opts & KRB5_NCRO_USE_FAST))
1662 294 : goto next_rule;
1663 :
1664 12203 : if(ret == 0 && (options & KRB5_GC_NO_STORE) == 0)
1665 12180 : store_cred(context, ccache, in_creds->server, *out_creds);
1666 :
1667 24383 : if (ret == 0 && _krb5_have_debug(context, 5)) {
1668 : char *unparsed;
1669 :
1670 0 : ret = krb5_unparse_name(context, (*out_creds)->server, &unparsed);
1671 0 : if (ret) {
1672 0 : _krb5_debug(context, 5, "krb5_get_creds: unable to display "
1673 : "service principal");
1674 : } else {
1675 0 : _krb5_debug(context, 5, "krb5_get_creds: got a ticket for %s",
1676 : unparsed);
1677 0 : free(unparsed);
1678 : }
1679 : }
1680 :
1681 89763 : out:
1682 77560 : in_creds->server = save_princ;
1683 77560 : krb5_free_creds(context, res_creds);
1684 77560 : krb5_free_name_canon_iterator(context, name_canon_iter);
1685 77560 : _krb5_fast_free(context, &fast_state);
1686 77560 : if (ret)
1687 323 : return not_found(context, in_creds->server, ret);
1688 77237 : return 0;
1689 : }
1690 :
1691 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1692 77560 : krb5_get_credentials(krb5_context context,
1693 : krb5_flags options,
1694 : krb5_ccache ccache,
1695 : krb5_creds *in_creds,
1696 : krb5_creds **out_creds)
1697 : {
1698 : krb5_kdc_flags flags;
1699 77560 : flags.i = 0;
1700 77560 : return krb5_get_credentials_with_flags(context, options, flags,
1701 : ccache, in_creds, out_creds);
1702 : }
1703 :
1704 : struct krb5_get_creds_opt_data {
1705 : krb5_principal self;
1706 : krb5_flags options;
1707 : krb5_enctype enctype;
1708 : Ticket *ticket;
1709 : };
1710 :
1711 :
1712 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1713 3075 : krb5_get_creds_opt_alloc(krb5_context context, krb5_get_creds_opt *opt)
1714 : {
1715 3075 : *opt = calloc(1, sizeof(**opt));
1716 3075 : if (*opt == NULL)
1717 0 : return krb5_enomem(context);
1718 3075 : return 0;
1719 : }
1720 :
1721 : KRB5_LIB_FUNCTION void KRB5_LIB_CALL
1722 193 : krb5_get_creds_opt_free(krb5_context context, krb5_get_creds_opt opt)
1723 : {
1724 193 : if (opt->self)
1725 32 : krb5_free_principal(context, opt->self);
1726 193 : if (opt->ticket) {
1727 14 : free_Ticket(opt->ticket);
1728 14 : free(opt->ticket);
1729 : }
1730 193 : memset(opt, 0, sizeof(*opt));
1731 193 : free(opt);
1732 193 : }
1733 :
1734 : KRB5_LIB_FUNCTION void KRB5_LIB_CALL
1735 30 : krb5_get_creds_opt_set_options(krb5_context context,
1736 : krb5_get_creds_opt opt,
1737 : krb5_flags options)
1738 : {
1739 30 : opt->options = options;
1740 30 : }
1741 :
1742 : KRB5_LIB_FUNCTION void KRB5_LIB_CALL
1743 6000 : krb5_get_creds_opt_add_options(krb5_context context,
1744 : krb5_get_creds_opt opt,
1745 : krb5_flags options)
1746 : {
1747 6000 : opt->options |= options;
1748 6000 : }
1749 :
1750 : KRB5_LIB_FUNCTION void KRB5_LIB_CALL
1751 0 : krb5_get_creds_opt_set_enctype(krb5_context context,
1752 : krb5_get_creds_opt opt,
1753 : krb5_enctype enctype)
1754 : {
1755 0 : opt->enctype = enctype;
1756 0 : }
1757 :
1758 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1759 752 : krb5_get_creds_opt_set_impersonate(krb5_context context,
1760 : krb5_get_creds_opt opt,
1761 : krb5_const_principal self)
1762 : {
1763 752 : if (opt->self)
1764 0 : krb5_free_principal(context, opt->self);
1765 752 : return krb5_copy_principal(context, self, &opt->self);
1766 : }
1767 :
1768 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1769 16 : krb5_get_creds_opt_set_ticket(krb5_context context,
1770 : krb5_get_creds_opt opt,
1771 : const Ticket *ticket)
1772 : {
1773 16 : if (opt->ticket) {
1774 0 : free_Ticket(opt->ticket);
1775 0 : free(opt->ticket);
1776 0 : opt->ticket = NULL;
1777 : }
1778 16 : if (ticket) {
1779 : krb5_error_code ret;
1780 :
1781 16 : opt->ticket = malloc(sizeof(*ticket));
1782 16 : if (opt->ticket == NULL)
1783 0 : return krb5_enomem(context);
1784 16 : ret = copy_Ticket(ticket, opt->ticket);
1785 16 : if (ret) {
1786 0 : free(opt->ticket);
1787 0 : opt->ticket = NULL;
1788 0 : krb5_set_error_message(context, ret,
1789 0 : N_("malloc: out of memory", ""));
1790 0 : return ret;
1791 : }
1792 : }
1793 16 : return 0;
1794 : }
1795 :
1796 :
1797 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1798 3651 : krb5_get_creds(krb5_context context,
1799 : krb5_get_creds_opt opt,
1800 : krb5_ccache ccache,
1801 : krb5_const_principal inprinc,
1802 : krb5_creds **out_creds)
1803 : {
1804 : struct krb5_fast_state fast_state;
1805 : krb5_kdc_flags flags;
1806 : krb5_flags options;
1807 : krb5_creds in_creds;
1808 : krb5_error_code ret;
1809 : krb5_creds **tgts;
1810 : krb5_creds *res_creds;
1811 3651 : krb5_const_principal try_princ = NULL;
1812 3651 : krb5_name_canon_iterator name_canon_iter = NULL;
1813 : krb5_name_canon_rule_options rule_opts;
1814 : int i;
1815 : int type;
1816 : const char *comp;
1817 :
1818 3651 : memset(&fast_state, 0, sizeof(fast_state));
1819 3651 : memset(&in_creds, 0, sizeof(in_creds));
1820 3651 : in_creds.server = rk_UNCONST(inprinc);
1821 :
1822 3651 : if (_krb5_have_debug(context, 5)) {
1823 : char *unparsed;
1824 :
1825 0 : ret = krb5_unparse_name(context, in_creds.server, &unparsed);
1826 0 : if (ret) {
1827 0 : _krb5_debug(context, 5, "krb5_get_creds: unable to display "
1828 : "requested service principal");
1829 : } else {
1830 0 : _krb5_debug(context, 5, "krb5_get_creds: requesting a ticket "
1831 : "for %s", unparsed);
1832 0 : free(unparsed);
1833 : }
1834 : }
1835 :
1836 3651 : if (opt && opt->enctype) {
1837 0 : ret = krb5_enctype_valid(context, opt->enctype);
1838 0 : if (ret)
1839 0 : return ret;
1840 : }
1841 :
1842 3651 : ret = krb5_cc_get_principal(context, ccache, &in_creds.client);
1843 3651 : if (ret)
1844 0 : return ret;
1845 :
1846 3651 : if (opt)
1847 3651 : options = opt->options;
1848 : else
1849 0 : options = 0;
1850 3651 : flags.i = 0;
1851 :
1852 3651 : *out_creds = NULL;
1853 3651 : res_creds = calloc(1, sizeof(*res_creds));
1854 3651 : if (res_creds == NULL) {
1855 0 : krb5_free_principal(context, in_creds.client);
1856 0 : return krb5_enomem(context);
1857 : }
1858 :
1859 3651 : if (opt && opt->enctype) {
1860 0 : in_creds.session.keytype = opt->enctype;
1861 0 : options |= KRB5_TC_MATCH_KEYTYPE;
1862 : }
1863 :
1864 3651 : ret = krb5_name_canon_iterator_start(context, in_creds.server,
1865 : &name_canon_iter);
1866 3651 : if (ret)
1867 0 : goto out;
1868 :
1869 3651 : next_rule:
1870 4011 : ret = krb5_name_canon_iterate(context, &name_canon_iter, &try_princ,
1871 : &rule_opts);
1872 4011 : in_creds.server = rk_UNCONST(try_princ);
1873 4011 : if (ret)
1874 0 : goto out;
1875 :
1876 4011 : if (name_canon_iter == NULL) {
1877 360 : if (options & KRB5_GC_CACHED)
1878 0 : ret = KRB5_CC_NOTFOUND;
1879 : else
1880 360 : ret = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
1881 360 : goto out;
1882 : }
1883 :
1884 3651 : if ((options & KRB5_GC_CONSTRAINED_DELEGATION) == 0) {
1885 3635 : ret = check_cc(context, options, ccache, &in_creds, res_creds);
1886 3635 : if (ret == 0) {
1887 0 : *out_creds = res_creds;
1888 0 : res_creds = NULL;
1889 0 : goto out;
1890 3635 : } else if (ret != KRB5_CC_END) {
1891 0 : goto out;
1892 : }
1893 : }
1894 3651 : if (options & KRB5_GC_CACHED)
1895 0 : goto next_rule;
1896 :
1897 3651 : type = krb5_principal_get_type(context, try_princ);
1898 3651 : comp = krb5_principal_get_comp_string(context, try_princ, 0);
1899 3651 : if ((type == KRB5_NT_SRV_HST || type == KRB5_NT_UNKNOWN) &&
1900 88 : comp != NULL && strcmp(comp, "host") == 0)
1901 24 : flags.b.canonicalize = 1;
1902 3651 : if (rule_opts & KRB5_NCRO_NO_REFERRALS)
1903 0 : flags.b.canonicalize = 0;
1904 : else
1905 3651 : flags.b.canonicalize = (options & KRB5_GC_CANONICALIZE) ? 1 : 0;
1906 3651 : if (options & KRB5_GC_USER_USER) {
1907 0 : flags.b.enc_tkt_in_skey = 1;
1908 0 : options |= KRB5_GC_NO_STORE;
1909 : }
1910 3651 : if (options & KRB5_GC_FORWARDABLE)
1911 16 : flags.b.forwardable = 1;
1912 3651 : if (options & KRB5_GC_NO_TRANSIT_CHECK)
1913 0 : flags.b.disable_transited_check = 1;
1914 3651 : if (options & KRB5_GC_CONSTRAINED_DELEGATION)
1915 16 : flags.b.cname_in_addl_tkt = 1;
1916 3651 : if (options & KRB5_GC_ANONYMOUS)
1917 0 : flags.b.request_anonymous = 1;
1918 :
1919 3651 : tgts = NULL;
1920 3651 : ret = _krb5_get_cred_kdc_any(context, flags, ccache, &fast_state,
1921 : &in_creds, opt ? opt->self : 0,
1922 : opt ? opt->ticket : 0, out_creds,
1923 : &tgts);
1924 3652 : for (i = 0; tgts && tgts[i]; i++) {
1925 1 : if ((options & KRB5_GC_NO_STORE) == 0)
1926 1 : krb5_cc_store_cred(context, ccache, tgts[i]);
1927 1 : krb5_free_creds(context, tgts[i]);
1928 : }
1929 3651 : free(tgts);
1930 :
1931 : /* We don't yet have TGS w/ FAST, so we can't protect KBR-ERRORs */
1932 4011 : if (ret == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN &&
1933 360 : !(rule_opts & KRB5_NCRO_USE_FAST))
1934 360 : goto next_rule;
1935 :
1936 3291 : if (ret == 0 && (options & KRB5_GC_NO_STORE) == 0)
1937 42 : store_cred(context, ccache, inprinc, *out_creds);
1938 :
1939 4852 : if (ret == 0 && _krb5_have_debug(context, 5)) {
1940 : char *unparsed;
1941 :
1942 0 : ret = krb5_unparse_name(context, (*out_creds)->server, &unparsed);
1943 0 : if (ret) {
1944 0 : _krb5_debug(context, 5, "krb5_get_creds: unable to display "
1945 : "service principal");
1946 : } else {
1947 0 : _krb5_debug(context, 5, "krb5_get_creds: got a ticket for %s",
1948 : unparsed);
1949 0 : free(unparsed);
1950 : }
1951 : }
1952 :
1953 6942 : out:
1954 3651 : _krb5_fast_free(context, &fast_state);
1955 3651 : krb5_free_creds(context, res_creds);
1956 3651 : krb5_free_principal(context, in_creds.client);
1957 3651 : krb5_free_name_canon_iterator(context, name_canon_iter);
1958 3651 : if (ret)
1959 2090 : return not_found(context, inprinc, ret);
1960 1561 : return ret;
1961 : }
1962 :
1963 : /*
1964 : *
1965 : */
1966 :
1967 : KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1968 0 : krb5_get_renewed_creds(krb5_context context,
1969 : krb5_creds *creds,
1970 : krb5_const_principal client,
1971 : krb5_ccache ccache,
1972 : const char *in_tkt_service)
1973 : {
1974 : krb5_error_code ret;
1975 : krb5_kdc_flags flags;
1976 0 : krb5_creds in, *template, *out = NULL;
1977 :
1978 0 : memset(&in, 0, sizeof(in));
1979 0 : memset(creds, 0, sizeof(*creds));
1980 :
1981 0 : ret = krb5_copy_principal(context, client, &in.client);
1982 0 : if (ret)
1983 0 : return ret;
1984 :
1985 0 : if (in_tkt_service) {
1986 0 : ret = krb5_parse_name(context, in_tkt_service, &in.server);
1987 0 : if (ret) {
1988 0 : krb5_free_principal(context, in.client);
1989 0 : return ret;
1990 : }
1991 : } else {
1992 0 : const char *realm = krb5_principal_get_realm(context, client);
1993 :
1994 0 : ret = krb5_make_principal(context, &in.server, realm, KRB5_TGS_NAME,
1995 : realm, NULL);
1996 0 : if (ret) {
1997 0 : krb5_free_principal(context, in.client);
1998 0 : return ret;
1999 : }
2000 : }
2001 :
2002 0 : flags.i = 0;
2003 0 : flags.b.renewable = flags.b.renew = 1;
2004 :
2005 : /*
2006 : * Get template from old credential cache for the same entry, if
2007 : * this failes, no worries.
2008 : */
2009 0 : ret = krb5_get_credentials(context, KRB5_GC_CACHED, ccache, &in, &template);
2010 0 : if (ret == 0) {
2011 0 : flags.b.forwardable = template->flags.b.forwardable;
2012 0 : flags.b.proxiable = template->flags.b.proxiable;
2013 0 : krb5_free_creds (context, template);
2014 : }
2015 :
2016 0 : ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &in, &out);
2017 0 : krb5_free_principal(context, in.client);
2018 0 : krb5_free_principal(context, in.server);
2019 0 : if (ret)
2020 0 : return ret;
2021 :
2022 0 : ret = krb5_copy_creds_contents(context, out, creds);
2023 0 : krb5_free_creds(context, out);
2024 :
2025 0 : return ret;
2026 : }
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