1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
4 * Portions Copyright (C) 2007 Apple Inc.
5 * Copyright 1990, 1991, 2007, 2008, 2009, 2013, 2014 by the
6 * Massachusetts Institute of Technology. All Rights Reserved.
8 * Export of this software from the United States of America may
9 * require a specific license from the United States Government.
10 * It is the responsibility of any person or organization contemplating
11 * export to obtain such a license before exporting.
13 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
14 * distribute this software and its documentation for any purpose and
15 * without fee is hereby granted, provided that the above copyright
16 * notice appear in all copies and that both that copyright notice and
17 * this permission notice appear in supporting documentation, and that
18 * the name of M.I.T. not be used in advertising or publicity pertaining
19 * to distribution of the software without specific, written prior
20 * permission. Furthermore if you modify this software you must label
21 * your software as modified software and not distribute it in such a
22 * fashion that it might be confused with the original M.I.T. software.
23 * M.I.T. makes no representations about the suitability of
24 * this software for any purpose. It is provided "as is" without express
25 * or implied warranty.
28 * KDC Routines to deal with AS_REQ's
31 * Copyright (c) 2006-2008, Novell, Inc.
32 * All rights reserved.
34 * Redistribution and use in source and binary forms, with or without
35 * modification, are permitted provided that the following conditions are met:
37 * * Redistributions of source code must retain the above copyright notice,
38 * this list of conditions and the following disclaimer.
39 * * Redistributions in binary form must reproduce the above copyright
40 * notice, this list of conditions and the following disclaimer in the
41 * documentation and/or other materials provided with the distribution.
42 * * The copyright holder's name is not used to endorse or promote products
43 * derived from this software without specific prior written permission.
45 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
46 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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50 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
51 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
52 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
53 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
54 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
55 * POSSIBILITY OF SUCH DAMAGE.
62 #ifdef HAVE_NETINET_IN_H
63 #include <sys/types.h>
64 #include <netinet/in.h>
66 #include <arpa/inet.h>
68 #endif /* HAVE_NETINET_IN_H */
71 #include "kdc_audit.h"
73 #include <kadm5/admin.h>
74 #include "adm_proto.h"
77 static krb5_error_code
78 prepare_error_as(struct kdc_request_state *, krb5_kdc_req *, krb5_db_entry *,
79 int, krb5_pa_data **, krb5_boolean, krb5_principal,
80 krb5_data **, const char *);
82 /* Determine the key-expiration value according to RFC 4120 section 5.4.2. */
84 get_key_exp(krb5_db_entry *entry)
86 if (entry->expiration == 0)
87 return entry->pw_expiration;
88 if (entry->pw_expiration == 0)
89 return entry->expiration;
90 return ts_min(entry->expiration, entry->pw_expiration);
94 * Find the key in client for the most preferred enctype in req_enctypes. Fill
95 * in *kb_out with the decrypted keyblock (which the caller must free) and set
96 * *kd_out to an alias to that key data entry. Set *kd_out to NULL and leave
97 * *kb_out zeroed if no key is found for any of the requested enctypes.
98 * kb_out->enctype may differ from the enctype of *kd_out for DES enctypes; in
99 * this case, kb_out->enctype is the requested enctype used to match the key
102 static krb5_error_code
103 select_client_key(krb5_context context, krb5_db_entry *client,
104 krb5_enctype *req_enctypes, int n_req_enctypes,
105 krb5_keyblock *kb_out, krb5_key_data **kd_out)
112 memset(kb_out, 0, sizeof(*kb_out));
115 for (i = 0; i < n_req_enctypes; i++) {
116 etype = req_enctypes[i];
117 if (!krb5_c_valid_enctype(etype))
119 if (krb5_dbe_find_enctype(context, client, etype, -1, 0, &kd) == 0) {
120 /* Decrypt the client key data and set its enctype to the request
121 * enctype (which may differ from the key data enctype for DES). */
122 ret = krb5_dbe_decrypt_key_data(context, NULL, kd, kb_out, NULL);
125 kb_out->enctype = etype;
133 struct as_req_state {
134 loop_respond_fn respond;
137 krb5_principal_data client_princ;
138 krb5_enc_tkt_part enc_tkt_reply;
139 krb5_enc_kdc_rep_part reply_encpart;
140 krb5_ticket ticket_reply;
141 krb5_keyblock server_keyblock;
142 krb5_keyblock client_keyblock;
143 krb5_db_entry *client;
144 krb5_db_entry *server;
145 krb5_db_entry *local_tgt;
146 krb5_db_entry *local_tgt_storage;
147 krb5_key_data *client_key;
148 krb5_kdc_req *request;
149 struct krb5_kdcpreauth_rock_st rock;
151 krb5_pa_data **e_data;
152 krb5_boolean typed_e_data;
154 krb5_timestamp kdc_time;
155 krb5_timestamp authtime;
156 krb5_keyblock session_key;
157 unsigned int c_flags;
159 krb5_data *inner_body;
160 struct kdc_request_state *rstate;
163 const krb5_fulladdr *local_addr;
164 const krb5_fulladdr *remote_addr;
165 krb5_data **auth_indicators;
167 krb5_error_code preauth_err;
169 kdc_realm_t *active_realm;
170 krb5_audit_state *au_state;
174 finish_process_as_req(struct as_req_state *state, krb5_error_code errcode)
176 krb5_key_data *server_key;
177 krb5_keyblock *as_encrypting_key = NULL;
178 krb5_data *response = NULL;
179 const char *emsg = 0;
181 loop_respond_fn oldrespond;
183 kdc_realm_t *kdc_active_realm = state->active_realm;
184 krb5_audit_state *au_state = state->au_state;
187 oldrespond = state->respond;
193 au_state->stage = ENCR_REP;
195 if ((errcode = validate_forwardable(state->request, *state->client,
196 *state->server, state->kdc_time,
198 errcode += ERROR_TABLE_BASE_krb5;
202 errcode = check_indicators(kdc_context, state->server,
203 state->auth_indicators);
205 state->status = "HIGHER_AUTHENTICATION_REQUIRED";
209 state->ticket_reply.enc_part2 = &state->enc_tkt_reply;
211 errcode = check_kdcpolicy_as(kdc_context, state->request, state->client,
212 state->server, state->auth_indicators,
213 state->kdc_time, &state->enc_tkt_reply.times,
219 * Find the server key
221 if ((errcode = krb5_dbe_find_enctype(kdc_context, state->server,
222 -1, /* ignore keytype */
223 -1, /* Ignore salttype */
224 0, /* Get highest kvno */
226 state->status = "FINDING_SERVER_KEY";
231 * Convert server->key into a real key
232 * (it may be encrypted in the database)
234 * server_keyblock is later used to generate auth data signatures
236 if ((errcode = krb5_dbe_decrypt_key_data(kdc_context, NULL,
238 &state->server_keyblock,
240 state->status = "DECRYPT_SERVER_KEY";
244 /* Start assembling the response */
245 state->reply.msg_type = KRB5_AS_REP;
246 state->reply.client = state->enc_tkt_reply.client; /* post canonization */
247 state->reply.ticket = &state->ticket_reply;
248 state->reply_encpart.session = &state->session_key;
249 if ((errcode = fetch_last_req_info(state->client,
250 &state->reply_encpart.last_req)))
252 state->reply_encpart.nonce = state->request->nonce;
253 state->reply_encpart.key_exp = get_key_exp(state->client);
254 state->reply_encpart.flags = state->enc_tkt_reply.flags;
255 state->reply_encpart.server = state->ticket_reply.server;
257 /* copy the time fields EXCEPT for authtime; it's location
260 state->reply_encpart.times = state->enc_tkt_reply.times;
261 state->reply_encpart.times.authtime = state->authtime = state->kdc_time;
263 state->reply_encpart.caddrs = state->enc_tkt_reply.caddrs;
264 state->reply_encpart.enc_padata = NULL;
266 /* Fetch the padata info to be returned (do this before
267 * authdata to handle possible replacement of reply key
269 errcode = return_padata(kdc_context, &state->rock, state->req_pkt,
270 state->request, &state->reply,
271 &state->client_keyblock, &state->pa_context);
273 state->status = "KDC_RETURN_PADATA";
277 /* If we didn't find a client long-term key and no preauth mechanism
278 * replaced the reply key, error out now. */
279 if (state->client_keyblock.enctype == ENCTYPE_NULL) {
280 state->status = "CANT_FIND_CLIENT_KEY";
281 errcode = KRB5KDC_ERR_ETYPE_NOSUPP;
285 errcode = handle_authdata(kdc_context,
291 &state->client_keyblock,
292 &state->server_keyblock,
296 NULL, /* for_user_princ */
297 NULL, /* enc_tkt_request */
298 state->auth_indicators,
299 &state->enc_tkt_reply);
301 krb5_klog_syslog(LOG_INFO, _("AS_REQ : handle_authdata (%d)"),
303 state->status = "HANDLE_AUTHDATA";
307 errcode = krb5_encrypt_tkt_part(kdc_context, &state->server_keyblock,
308 &state->ticket_reply);
312 errcode = kau_make_tkt_id(kdc_context, &state->ticket_reply,
313 &au_state->tkt_out_id);
317 state->ticket_reply.enc_part.kvno = server_key->key_data_kvno;
318 errcode = kdc_fast_response_handle_padata(state->rstate,
321 state->client_keyblock.enctype);
325 /* now encode/encrypt the response */
327 state->reply.enc_part.enctype = state->client_keyblock.enctype;
329 errcode = kdc_fast_handle_reply_key(state->rstate, &state->client_keyblock,
333 errcode = return_enc_padata(kdc_context, state->req_pkt, state->request,
334 as_encrypting_key, state->server,
335 &state->reply_encpart, FALSE);
337 state->status = "KDC_RETURN_ENC_PADATA";
341 if (kdc_fast_hide_client(state->rstate))
342 state->reply.client = (krb5_principal)krb5_anonymous_principal();
343 errcode = krb5_encode_kdc_rep(kdc_context, KRB5_AS_REP,
344 &state->reply_encpart, 0,
346 &state->reply, &response);
347 if (state->client_key != NULL)
348 state->reply.enc_part.kvno = state->client_key->key_data_kvno;
352 /* these parts are left on as a courtesy from krb5_encode_kdc_rep so we
353 can use them in raw form if needed. But, we don't... */
354 memset(state->reply.enc_part.ciphertext.data, 0,
355 state->reply.enc_part.ciphertext.length);
356 free(state->reply.enc_part.ciphertext.data);
358 log_as_req(kdc_context, state->local_addr, state->remote_addr,
359 state->request, &state->reply, state->client, state->cname,
360 state->server, state->sname, state->authtime, 0, 0, 0);
364 if (errcode != 0 && state->status == NULL)
365 state->status = "UNKNOWN_REASON";
367 au_state->status = state->status;
368 au_state->reply = &state->reply;
369 kau_as_req(kdc_context,
370 (errcode || state->preauth_err) ? FALSE : TRUE, au_state);
371 kau_free_kdc_req(au_state);
373 free_padata_context(kdc_context, state->pa_context);
374 if (as_encrypting_key)
375 krb5_free_keyblock(kdc_context, as_encrypting_key);
377 emsg = krb5_get_error_message(kdc_context, errcode);
380 log_as_req(kdc_context, state->local_addr, state->remote_addr,
381 state->request, &state->reply, state->client,
382 state->cname, state->server, state->sname, state->authtime,
383 state->status, errcode, emsg);
387 if (state->status == 0) {
388 state->status = emsg;
390 if (errcode != KRB5KDC_ERR_DISCARD) {
391 errcode -= ERROR_TABLE_BASE_krb5;
392 if (errcode < 0 || errcode > KRB_ERR_MAX)
393 errcode = KRB_ERR_GENERIC;
395 errcode = prepare_error_as(state->rstate, state->request,
396 state->local_tgt, errcode,
397 state->e_data, state->typed_e_data,
398 ((state->client != NULL) ?
399 state->client->princ : NULL),
400 &response, state->status);
406 krb5_free_error_message(kdc_context, emsg);
407 if (state->enc_tkt_reply.authorization_data != NULL)
408 krb5_free_authdata(kdc_context,
409 state->enc_tkt_reply.authorization_data);
410 if (state->server_keyblock.contents != NULL)
411 krb5_free_keyblock_contents(kdc_context, &state->server_keyblock);
412 if (state->client_keyblock.contents != NULL)
413 krb5_free_keyblock_contents(kdc_context, &state->client_keyblock);
414 if (state->reply.padata != NULL)
415 krb5_free_pa_data(kdc_context, state->reply.padata);
416 if (state->reply_encpart.enc_padata)
417 krb5_free_pa_data(kdc_context, state->reply_encpart.enc_padata);
419 if (state->cname != NULL)
421 if (state->sname != NULL)
423 krb5_db_free_principal(kdc_context, state->client);
424 krb5_db_free_principal(kdc_context, state->server);
425 krb5_db_free_principal(kdc_context, state->local_tgt_storage);
426 if (state->session_key.contents != NULL)
427 krb5_free_keyblock_contents(kdc_context, &state->session_key);
428 if (state->ticket_reply.enc_part.ciphertext.data != NULL) {
429 memset(state->ticket_reply.enc_part.ciphertext.data , 0,
430 state->ticket_reply.enc_part.ciphertext.length);
431 free(state->ticket_reply.enc_part.ciphertext.data);
434 krb5_free_pa_data(kdc_context, state->e_data);
435 krb5_free_data(kdc_context, state->inner_body);
436 kdc_free_rstate(state->rstate);
437 krb5_free_kdc_req(kdc_context, state->request);
438 k5_free_data_ptr_list(state->auth_indicators);
439 assert(did_log != 0);
442 (*oldrespond)(oldarg, errcode, response);
446 finish_missing_required_preauth(void *arg)
448 struct as_req_state *state = (struct as_req_state *)arg;
450 finish_process_as_req(state, state->preauth_err);
454 finish_preauth(void *arg, krb5_error_code code)
456 struct as_req_state *state = arg;
457 krb5_error_code real_code = code;
461 code = KRB5KRB_ERR_GENERIC;
462 state->status = "PREAUTH_FAILED";
463 if (real_code == KRB5KDC_ERR_PREAUTH_FAILED) {
464 state->preauth_err = code;
465 get_preauth_hint_list(state->request, &state->rock, &state->e_data,
466 finish_missing_required_preauth, state);
471 * Final check before handing out ticket: If the client requires
472 * preauthentication, verify that the proper kind of
473 * preauthentication was carried out.
475 state->status = missing_required_preauth(state->client, state->server,
476 &state->enc_tkt_reply);
478 state->preauth_err = KRB5KDC_ERR_PREAUTH_REQUIRED;
479 get_preauth_hint_list(state->request, &state->rock, &state->e_data,
480 finish_missing_required_preauth, state);
485 finish_process_as_req(state, code);
490 process_as_req(krb5_kdc_req *request, krb5_data *req_pkt,
491 const krb5_fulladdr *local_addr,
492 const krb5_fulladdr *remote_addr, kdc_realm_t *kdc_active_realm,
493 verto_ctx *vctx, loop_respond_fn respond, void *arg)
495 krb5_error_code errcode;
496 unsigned int s_flags = 0;
497 krb5_data encoded_req_body;
498 krb5_enctype useenctype;
499 struct as_req_state *state;
500 krb5_audit_state *au_state = NULL;
502 state = k5alloc(sizeof(*state), &errcode);
504 (*respond)(arg, errcode, NULL);
507 state->respond = respond;
509 state->request = request;
510 state->req_pkt = req_pkt;
511 state->local_addr = local_addr;
512 state->remote_addr = remote_addr;
513 state->active_realm = kdc_active_realm;
515 errcode = kdc_make_rstate(kdc_active_realm, &state->rstate);
517 (*respond)(arg, errcode, NULL);
522 /* Initialize audit state. */
523 errcode = kau_init_kdc_req(kdc_context, state->request, remote_addr,
526 (*respond)(arg, errcode, NULL);
527 kdc_free_rstate(state->rstate);
531 state->au_state = au_state;
533 if (state->request->msg_type != KRB5_AS_REQ) {
534 state->status = "VALIDATE_MESSAGE_TYPE";
535 errcode = KRB5_BADMSGTYPE;
539 /* Seed the audit trail with the request ID and basic information. */
540 kau_as_req(kdc_context, TRUE, au_state);
542 if (fetch_asn1_field((unsigned char *) req_pkt->data,
543 1, 4, &encoded_req_body) != 0) {
544 errcode = ASN1_BAD_ID;
547 errcode = kdc_find_fast(&state->request, &encoded_req_body, NULL, NULL,
548 state->rstate, &state->inner_body);
550 state->status = "FIND_FAST";
553 if (state->inner_body == NULL) {
554 /* Not a FAST request; copy the encoded request body. */
555 errcode = krb5_copy_data(kdc_context, &encoded_req_body,
560 au_state->request = state->request;
561 state->rock.request = state->request;
562 state->rock.inner_body = state->inner_body;
563 state->rock.rstate = state->rstate;
564 state->rock.vctx = vctx;
565 state->rock.auth_indicators = &state->auth_indicators;
566 state->rock.send_freshness_token = FALSE;
567 if (!state->request->client) {
568 state->status = "NULL_CLIENT";
569 errcode = KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN;
572 if ((errcode = krb5_unparse_name(kdc_context,
573 state->request->client,
576 limit_string(state->cname);
578 if (!state->request->server) {
579 state->status = "NULL_SERVER";
580 errcode = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
583 if ((errcode = krb5_unparse_name(kdc_context,
584 state->request->server,
587 limit_string(state->sname);
590 * We set KRB5_KDB_FLAG_CLIENT_REFERRALS_ONLY as a hint
591 * to the backend to return naming information in lieu
592 * of cross realm TGS entries.
594 setflag(state->c_flags, KRB5_KDB_FLAG_CLIENT_REFERRALS_ONLY);
596 * Note that according to the referrals draft we should
597 * always canonicalize enterprise principal names.
599 if (isflagset(state->request->kdc_options, KDC_OPT_CANONICALIZE) ||
600 state->request->client->type == KRB5_NT_ENTERPRISE_PRINCIPAL) {
601 setflag(state->c_flags, KRB5_KDB_FLAG_CANONICALIZE);
602 setflag(state->c_flags, KRB5_KDB_FLAG_ALIAS_OK);
604 if (include_pac_p(kdc_context, state->request)) {
605 setflag(state->c_flags, KRB5_KDB_FLAG_INCLUDE_PAC);
607 errcode = krb5_db_get_principal(kdc_context, state->request->client,
608 state->c_flags, &state->client);
609 if (errcode == KRB5_KDB_CANTLOCK_DB)
610 errcode = KRB5KDC_ERR_SVC_UNAVAILABLE;
611 if (errcode == KRB5_KDB_NOENTRY) {
612 state->status = "CLIENT_NOT_FOUND";
614 errcode = KRB5KRB_ERR_GENERIC;
616 errcode = KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN;
618 } else if (errcode) {
619 state->status = "LOOKING_UP_CLIENT";
622 state->rock.client = state->client;
625 * If the backend returned a principal that is not in the local
626 * realm, then we need to refer the client to that realm.
628 if (!is_local_principal(kdc_active_realm, state->client->princ)) {
629 /* Entry is a referral to another realm */
630 state->status = "REFERRAL";
631 au_state->cl_realm = &state->client->princ->realm;
632 errcode = KRB5KDC_ERR_WRONG_REALM;
636 au_state->stage = SRVC_PRINC;
639 setflag(s_flags, KRB5_KDB_FLAG_ALIAS_OK);
640 if (isflagset(state->request->kdc_options, KDC_OPT_CANONICALIZE)) {
641 setflag(s_flags, KRB5_KDB_FLAG_CANONICALIZE);
643 errcode = krb5_db_get_principal(kdc_context, state->request->server,
644 s_flags, &state->server);
645 if (errcode == KRB5_KDB_CANTLOCK_DB)
646 errcode = KRB5KDC_ERR_SVC_UNAVAILABLE;
647 if (errcode == KRB5_KDB_NOENTRY) {
648 state->status = "SERVER_NOT_FOUND";
649 errcode = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
651 } else if (errcode) {
652 state->status = "LOOKING_UP_SERVER";
656 errcode = get_local_tgt(kdc_context, &state->request->server->realm,
657 state->server, &state->local_tgt,
658 &state->local_tgt_storage);
660 state->status = "GET_LOCAL_TGT";
663 state->rock.local_tgt = state->local_tgt;
665 au_state->stage = VALIDATE_POL;
667 if ((errcode = krb5_timeofday(kdc_context, &state->kdc_time)))
669 state->authtime = state->kdc_time; /* for audit_as_request() */
671 if ((errcode = validate_as_request(kdc_active_realm,
672 state->request, *state->client,
673 *state->server, state->kdc_time,
674 &state->status, &state->e_data))) {
675 errcode += ERROR_TABLE_BASE_krb5;
679 au_state->stage = ISSUE_TKT;
682 * Select the keytype for the ticket session key.
684 if ((useenctype = select_session_keytype(kdc_active_realm, state->server,
685 state->request->nktypes,
686 state->request->ktype)) == 0) {
687 /* unsupported ktype */
688 state->status = "BAD_ENCRYPTION_TYPE";
689 errcode = KRB5KDC_ERR_ETYPE_NOSUPP;
693 if ((errcode = krb5_c_make_random_key(kdc_context, useenctype,
694 &state->session_key)))
698 * Canonicalization is only effective if we are issuing a TGT
699 * (the intention is to allow support for Windows "short" realm
700 * aliases, nothing more).
702 if (isflagset(s_flags, KRB5_KDB_FLAG_CANONICALIZE) &&
703 krb5_is_tgs_principal(state->request->server) &&
704 krb5_is_tgs_principal(state->server->princ)) {
705 state->ticket_reply.server = state->server->princ;
707 state->ticket_reply.server = state->request->server;
710 /* Copy options that request the corresponding ticket flags. */
711 state->enc_tkt_reply.flags = OPTS2FLAGS(state->request->kdc_options);
712 state->enc_tkt_reply.times.authtime = state->authtime;
714 setflag(state->enc_tkt_reply.flags, TKT_FLG_INITIAL);
715 setflag(state->enc_tkt_reply.flags, TKT_FLG_ENC_PA_REP);
718 * It should be noted that local policy may affect the
719 * processing of any of these flags. For example, some
720 * realms may refuse to issue renewable tickets
723 state->enc_tkt_reply.session = &state->session_key;
724 if (isflagset(state->c_flags, KRB5_KDB_FLAG_CANONICALIZE)) {
725 state->client_princ = *(state->client->princ);
727 state->client_princ = *(state->request->client);
728 /* The realm is always canonicalized */
729 state->client_princ.realm = state->client->princ->realm;
731 state->enc_tkt_reply.client = &state->client_princ;
732 state->enc_tkt_reply.transited.tr_type = KRB5_DOMAIN_X500_COMPRESS;
733 state->enc_tkt_reply.transited.tr_contents = empty_string;
735 if (isflagset(state->request->kdc_options, KDC_OPT_POSTDATED)) {
736 setflag(state->enc_tkt_reply.flags, TKT_FLG_INVALID);
737 state->enc_tkt_reply.times.starttime = state->request->from;
739 state->enc_tkt_reply.times.starttime = state->kdc_time;
741 kdc_get_ticket_endtime(kdc_active_realm,
742 state->enc_tkt_reply.times.starttime,
743 kdc_infinity, state->request->till, state->client,
744 state->server, &state->enc_tkt_reply.times.endtime);
746 kdc_get_ticket_renewtime(kdc_active_realm, state->request, NULL,
747 state->client, state->server,
748 &state->enc_tkt_reply);
751 * starttime is optional, and treated as authtime if not present.
752 * so we can nuke it if it matches
754 if (state->enc_tkt_reply.times.starttime ==
755 state->enc_tkt_reply.times.authtime)
756 state->enc_tkt_reply.times.starttime = 0;
758 state->enc_tkt_reply.caddrs = state->request->addresses;
759 state->enc_tkt_reply.authorization_data = 0;
761 /* If anonymous requests are being used, adjust the realm of the client
763 if (isflagset(state->request->kdc_options, KDC_OPT_REQUEST_ANONYMOUS)) {
764 if (!krb5_principal_compare_any_realm(kdc_context,
765 state->request->client,
766 krb5_anonymous_principal())) {
767 errcode = KRB5KDC_ERR_BADOPTION;
768 /* Anonymous requested but anonymous principal not used.*/
769 state->status = "VALIDATE_ANONYMOUS_PRINCIPAL";
772 krb5_free_principal(kdc_context, state->request->client);
773 state->request->client = NULL;
774 errcode = krb5_copy_principal(kdc_context, krb5_anonymous_principal(),
775 &state->request->client);
778 state->enc_tkt_reply.client = state->request->client;
779 setflag(state->client->attributes, KRB5_KDB_REQUIRES_PRE_AUTH);
782 errcode = select_client_key(kdc_context, state->client,
783 state->request->ktype, state->request->nktypes,
784 &state->client_keyblock, &state->client_key);
786 state->status = "DECRYPT_CLIENT_KEY";
789 if (state->client_key != NULL) {
790 state->rock.client_key = state->client_key;
791 state->rock.client_keyblock = &state->client_keyblock;
794 errcode = kdc_fast_read_cookie(kdc_context, state->rstate, state->request,
797 state->status = "READ_COOKIE";
802 * Check the preauthentication if it is there.
804 if (state->request->padata) {
805 check_padata(kdc_context, &state->rock, state->req_pkt,
806 state->request, &state->enc_tkt_reply, &state->pa_context,
807 &state->e_data, &state->typed_e_data, finish_preauth,
810 finish_preauth(state, 0);
814 finish_process_as_req(state, errcode);
817 static krb5_error_code
818 prepare_error_as(struct kdc_request_state *rstate, krb5_kdc_req *request,
819 krb5_db_entry *local_tgt, int error, krb5_pa_data **e_data_in,
820 krb5_boolean typed_e_data, krb5_principal canon_client,
821 krb5_data **response, const char *status)
824 krb5_error_code retval;
825 krb5_data *scratch = NULL, *e_data_asn1 = NULL, *fast_edata = NULL;
826 krb5_pa_data **e_data = NULL, *cookie = NULL;
827 kdc_realm_t *kdc_active_realm = rstate->realm_data;
830 errpkt.magic = KV5M_ERROR;
832 if (e_data_in != NULL) {
833 /* Add a PA-FX-COOKIE to e_data_in. e_data is a shallow copy
834 * containing aliases. */
835 for (count = 0; e_data_in[count] != NULL; count++);
836 e_data = calloc(count + 2, sizeof(*e_data));
839 memcpy(e_data, e_data_in, count * sizeof(*e_data));
840 retval = kdc_fast_make_cookie(kdc_context, rstate, local_tgt,
841 request->client, &cookie);
842 e_data[count] = cookie;
848 retval = krb5_us_timeofday(kdc_context, &errpkt.stime, &errpkt.susec);
851 errpkt.error = error;
852 errpkt.server = request->server;
853 errpkt.client = (error == KDC_ERR_WRONG_REALM) ? canon_client :
855 errpkt.text = string2data((char *)status);
857 if (e_data != NULL) {
859 retval = encode_krb5_typed_data(e_data, &e_data_asn1);
861 retval = encode_krb5_padata_sequence(e_data, &e_data_asn1);
864 errpkt.e_data = *e_data_asn1;
866 errpkt.e_data = empty_data();
868 retval = kdc_fast_handle_error(kdc_context, rstate, request, e_data,
869 &errpkt, &fast_edata);
872 if (fast_edata != NULL)
873 errpkt.e_data = *fast_edata;
875 scratch = k5alloc(sizeof(*scratch), &retval);
878 if (kdc_fast_hide_client(rstate) && errpkt.client != NULL)
879 errpkt.client = (krb5_principal)krb5_anonymous_principal();
880 retval = krb5_mk_error(kdc_context, &errpkt, scratch);
888 krb5_free_data(kdc_context, fast_edata);
889 krb5_free_data(kdc_context, e_data_asn1);
893 free(cookie->contents);