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r19681: Update to current lorikeet-heimdal. I'm looking at using the realm
[Samba.git] / source / heimdal / kdc / kerberos5.c
blobdd88e2ea503e858d784e934160c24ee1f998d76a
1 /*
2 * Copyright (c) 1997-2006 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #include "kdc_locl.h"
35
36 RCSID("$Id: kerberos5.c,v 1.225 2006/11/10 03:36:32 lha Exp $");
37
38 #define MAX_TIME ((time_t)((1U << 31) - 1))
39
40 void
41 _kdc_fix_time(time_t **t)
42 {
43 if(*t == NULL){
44 ALLOC(*t);
45 **t = MAX_TIME;
46 }
47 if(**t == 0) **t = MAX_TIME; /* fix for old clients */
48 }
49
50 static int
51 realloc_method_data(METHOD_DATA *md)
52 {
53 PA_DATA *pa;
54 pa = realloc(md->val, (md->len + 1) * sizeof(*md->val));
55 if(pa == NULL)
56 return ENOMEM;
57 md->val = pa;
58 md->len++;
59 return 0;
60 }
61
62 static void
63 set_salt_padata (METHOD_DATA *md, Salt *salt)
64 {
65 if (salt) {
66 realloc_method_data(md);
67 md->val[md->len - 1].padata_type = salt->type;
68 der_copy_octet_string(&salt->salt,
69 &md->val[md->len - 1].padata_value);
70 }
71 }
72
73 PA_DATA*
74 _kdc_find_padata(KDC_REQ *req, int *start, int type)
75 {
76 while(*start < req->padata->len){
77 (*start)++;
78 if(req->padata->val[*start - 1].padata_type == type)
79 return &req->padata->val[*start - 1];
80 }
81 return NULL;
82 }
83
84 /*
85 * return the first appropriate key of `princ' in `ret_key'. Look for
86 * all the etypes in (`etypes', `len'), stopping as soon as we find
87 * one, but preferring one that has default salt
88 */
89
90 krb5_error_code
91 _kdc_find_etype(krb5_context context, const hdb_entry_ex *princ,
92 krb5_enctype *etypes, unsigned len,
93 Key **ret_key, krb5_enctype *ret_etype)
94 {
95 int i;
96 krb5_error_code ret = KRB5KDC_ERR_ETYPE_NOSUPP;
97
98 for(i = 0; ret != 0 && i < len ; i++) {
99 Key *key = NULL;
100
101 if (krb5_enctype_valid(context, etypes[i]) != 0)
102 continue;
103
104 while (hdb_next_enctype2key(context, &princ->entry, etypes[i], &key) == 0) {
105 if (key->key.keyvalue.length == 0) {
106 ret = KRB5KDC_ERR_NULL_KEY;
107 continue;
108 }
109 *ret_key = key;
110 *ret_etype = etypes[i];
111 ret = 0;
112 if (key->salt == NULL)
113 return ret;
114 }
115 }
116 return ret;
117 }
118
119 krb5_error_code
120 _kdc_make_anonymous_principalname (PrincipalName *pn)
121 {
122 pn->name_type = KRB5_NT_PRINCIPAL;
123 pn->name_string.len = 1;
124 pn->name_string.val = malloc(sizeof(*pn->name_string.val));
125 if (pn->name_string.val == NULL)
126 return ENOMEM;
127 pn->name_string.val[0] = strdup("anonymous");
128 if (pn->name_string.val[0] == NULL) {
129 free(pn->name_string.val);
130 pn->name_string.val = NULL;
131 return ENOMEM;
132 }
133 return 0;
134 }
135
136 void
137 _kdc_log_timestamp(krb5_context context,
138 krb5_kdc_configuration *config,
139 const char *type,
140 KerberosTime authtime, KerberosTime *starttime,
141 KerberosTime endtime, KerberosTime *renew_till)
142 {
143 char authtime_str[100], starttime_str[100],
144 endtime_str[100], renewtime_str[100];
145
146 krb5_format_time(context, authtime,
147 authtime_str, sizeof(authtime_str), TRUE);
148 if (starttime)
149 krb5_format_time(context, *starttime,
150 starttime_str, sizeof(starttime_str), TRUE);
151 else
152 strlcpy(starttime_str, "unset", sizeof(starttime_str));
153 krb5_format_time(context, endtime,
154 endtime_str, sizeof(endtime_str), TRUE);
155 if (renew_till)
156 krb5_format_time(context, *renew_till,
157 renewtime_str, sizeof(renewtime_str), TRUE);
158 else
159 strlcpy(renewtime_str, "unset", sizeof(renewtime_str));
160
161 kdc_log(context, config, 5,
162 "%s authtime: %s starttime: %s endtime: %s renew till: %s",
163 type, authtime_str, starttime_str, endtime_str, renewtime_str);
164 }
165
166 static void
167 log_patypes(krb5_context context,
168 krb5_kdc_configuration *config,
169 METHOD_DATA *padata)
170 {
171 struct rk_strpool *p = NULL;
172 char *str;
173 int i;
174
175 for (i = 0; i < padata->len; i++) {
176 switch(padata->val[i].padata_type) {
177 case KRB5_PADATA_PK_AS_REQ:
178 p = rk_strpoolprintf(p, "PK-INIT(ietf)");
179 break;
180 case KRB5_PADATA_PK_AS_REQ_WIN:
181 p = rk_strpoolprintf(p, "PK-INIT(win2k)");
182 break;
183 case KRB5_PADATA_PA_PK_OCSP_RESPONSE:
184 p = rk_strpoolprintf(p, "OCSP");
185 break;
186 case KRB5_PADATA_ENC_TIMESTAMP:
187 p = rk_strpoolprintf(p, "encrypted-timestamp");
188 break;
189 default:
190 p = rk_strpoolprintf(p, "%d", padata->val[i].padata_type);
191 break;
192 }
193 if (p && i + 1 < padata->len)
194 p = rk_strpoolprintf(p, ", ");
195 if (p == NULL) {
196 kdc_log(context, config, 0, "out of memory");
197 return;
198 }
199 }
200 if (p == NULL)
201 p = rk_strpoolprintf(p, "none");
202
203 str = rk_strpoolcollect(p);
204 kdc_log(context, config, 0, "Client sent patypes: %s", str);
205 free(str);
206 }
207
208 /*
209 *
210 */
211
212
213 krb5_error_code
214 _kdc_encode_reply(krb5_context context,
215 krb5_kdc_configuration *config,
216 KDC_REP *rep, const EncTicketPart *et, EncKDCRepPart *ek,
217 krb5_enctype etype,
218 int skvno, const EncryptionKey *skey,
219 int ckvno, const EncryptionKey *ckey,
220 const char **e_text,
221 krb5_data *reply)
222 {
223 unsigned char *buf;
224 size_t buf_size;
225 size_t len;
226 krb5_error_code ret;
227 krb5_crypto crypto;
228
229 ASN1_MALLOC_ENCODE(EncTicketPart, buf, buf_size, et, &len, ret);
230 if(ret) {
231 kdc_log(context, config, 0, "Failed to encode ticket: %s",
232 krb5_get_err_text(context, ret));
233 return ret;
234 }
235 if(buf_size != len) {
236 free(buf);
237 kdc_log(context, config, 0, "Internal error in ASN.1 encoder");
238 *e_text = "KDC internal error";
239 return KRB5KRB_ERR_GENERIC;
240 }
241
242 ret = krb5_crypto_init(context, skey, etype, &crypto);
243 if (ret) {
244 free(buf);
245 kdc_log(context, config, 0, "krb5_crypto_init failed: %s",
246 krb5_get_err_text(context, ret));
247 return ret;
248 }
249
250 ret = krb5_encrypt_EncryptedData(context,
251 crypto,
252 KRB5_KU_TICKET,
253 buf,
254 len,
255 skvno,
256 &rep->ticket.enc_part);
257 free(buf);
258 krb5_crypto_destroy(context, crypto);
259 if(ret) {
260 kdc_log(context, config, 0, "Failed to encrypt data: %s",
261 krb5_get_err_text(context, ret));
262 return ret;
263 }
264
265 if(rep->msg_type == krb_as_rep && !config->encode_as_rep_as_tgs_rep)
266 ASN1_MALLOC_ENCODE(EncASRepPart, buf, buf_size, ek, &len, ret);
267 else
268 ASN1_MALLOC_ENCODE(EncTGSRepPart, buf, buf_size, ek, &len, ret);
269 if(ret) {
270 kdc_log(context, config, 0, "Failed to encode KDC-REP: %s",
271 krb5_get_err_text(context, ret));
272 return ret;
273 }
274 if(buf_size != len) {
275 free(buf);
276 kdc_log(context, config, 0, "Internal error in ASN.1 encoder");
277 *e_text = "KDC internal error";
278 return KRB5KRB_ERR_GENERIC;
279 }
280 ret = krb5_crypto_init(context, ckey, 0, &crypto);
281 if (ret) {
282 free(buf);
283 kdc_log(context, config, 0, "krb5_crypto_init failed: %s",
284 krb5_get_err_text(context, ret));
285 return ret;
286 }
287 if(rep->msg_type == krb_as_rep) {
288 krb5_encrypt_EncryptedData(context,
289 crypto,
290 KRB5_KU_AS_REP_ENC_PART,
291 buf,
292 len,
293 ckvno,
294 &rep->enc_part);
295 free(buf);
296 ASN1_MALLOC_ENCODE(AS_REP, buf, buf_size, rep, &len, ret);
297 } else {
298 krb5_encrypt_EncryptedData(context,
299 crypto,
300 KRB5_KU_TGS_REP_ENC_PART_SESSION,
301 buf,
302 len,
303 ckvno,
304 &rep->enc_part);
305 free(buf);
306 ASN1_MALLOC_ENCODE(TGS_REP, buf, buf_size, rep, &len, ret);
307 }
308 krb5_crypto_destroy(context, crypto);
309 if(ret) {
310 kdc_log(context, config, 0, "Failed to encode KDC-REP: %s",
311 krb5_get_err_text(context, ret));
312 return ret;
313 }
314 if(buf_size != len) {
315 free(buf);
316 kdc_log(context, config, 0, "Internal error in ASN.1 encoder");
317 *e_text = "KDC internal error";
318 return KRB5KRB_ERR_GENERIC;
319 }
320 reply->data = buf;
321 reply->length = buf_size;
322 return 0;
323 }
324
325 static krb5_error_code
326 make_etype_info_entry(krb5_context context, ETYPE_INFO_ENTRY *ent, Key *key)
327 {
328 ent->etype = key->key.keytype;
329 if(key->salt){
330 #if 0
331 ALLOC(ent->salttype);
332
333 if(key->salt->type == hdb_pw_salt)
334 *ent->salttype = 0; /* or 1? or NULL? */
335 else if(key->salt->type == hdb_afs3_salt)
336 *ent->salttype = 2;
337 else {
338 kdc_log(context, config, 0, "unknown salt-type: %d",
339 key->salt->type);
340 return KRB5KRB_ERR_GENERIC;
341 }
342 /* according to `the specs', we can't send a salt if
343 we have AFS3 salted key, but that requires that you
344 *know* what cell you are using (e.g by assuming
345 that the cell is the same as the realm in lower
346 case) */
347 #elif 0
348 ALLOC(ent->salttype);
349 *ent->salttype = key->salt->type;
350 #else
351 /*
352 * We shouldn't sent salttype since its incompatible with the
353 * specification and its break windows clients. The afs
354 * salting problem is solved by using KRB5-PADATA-AFS3-SALT
355 * implemented in Heimdal 0.7 and later.
356 */
357 ent->salttype = NULL;
358 #endif
359 krb5_copy_data(context, &key->salt->salt,
360 &ent->salt);
361 } else {
362 /* we return no salt type at all, as that should indicate
363 * the default salt type and make everybody happy. some
364 * systems (like w2k) dislike being told the salt type
365 * here. */
366
367 ent->salttype = NULL;
368 ent->salt = NULL;
369 }
370 return 0;
371 }
372
373 static krb5_error_code
374 get_pa_etype_info(krb5_context context,
375 krb5_kdc_configuration *config,
376 METHOD_DATA *md, hdb_entry *client,
377 ENCTYPE *etypes, unsigned int etypes_len)
378 {
379 krb5_error_code ret = 0;
380 int i, j;
381 unsigned int n = 0;
382 ETYPE_INFO pa;
383 unsigned char *buf;
384 size_t len;
385
386
387 pa.len = client->keys.len;
388 if(pa.len > UINT_MAX/sizeof(*pa.val))
389 return ERANGE;
390 pa.val = malloc(pa.len * sizeof(*pa.val));
391 if(pa.val == NULL)
392 return ENOMEM;
393 memset(pa.val, 0, pa.len * sizeof(*pa.val));
394
395 for(j = 0; j < etypes_len; j++) {
396 for (i = 0; i < n; i++)
397 if (pa.val[i].etype == etypes[j])
398 goto skip1;
399 for(i = 0; i < client->keys.len; i++) {
400 if(client->keys.val[i].key.keytype == etypes[j]) {
401 if (krb5_enctype_valid(context, etypes[j]) != 0)
402 continue;
403 if((ret = make_etype_info_entry(context,
404 &pa.val[n++],
405 &client->keys.val[i])) != 0) {
406 free_ETYPE_INFO(&pa);
407 return ret;
408 }
409 }
410 }
411 skip1:;
412 }
413 for(i = 0; i < client->keys.len; i++) {
414 for(j = 0; j < etypes_len; j++) {
415 if(client->keys.val[i].key.keytype == etypes[j])
416 goto skip2;
417 }
418 if (krb5_enctype_valid(context, client->keys.val[i].key.keytype) != 0)
419 continue;
420 if((ret = make_etype_info_entry(context,
421 &pa.val[n++],
422 &client->keys.val[i])) != 0) {
423 free_ETYPE_INFO(&pa);
424 return ret;
425 }
426 skip2:;
427 }
428
429 if(n != pa.len) {
430 char *name;
431 ret = krb5_unparse_name(context, client->principal, &name);
432 if (ret)
433 name = "<unparse_name failed>";
434 kdc_log(context, config, 0, "internal error in get_pa_etype_info(%s): %d != %d",
435 name, n, pa.len);
436 if (ret == 0)
437 free(name);
438 pa.len = n;
439 }
440
441 ASN1_MALLOC_ENCODE(ETYPE_INFO, buf, len, &pa, &len, ret);
442 free_ETYPE_INFO(&pa);
443 if(ret)
444 return ret;
445 ret = realloc_method_data(md);
446 if(ret) {
447 free(buf);
448 return ret;
449 }
450 md->val[md->len - 1].padata_type = KRB5_PADATA_ETYPE_INFO;
451 md->val[md->len - 1].padata_value.length = len;
452 md->val[md->len - 1].padata_value.data = buf;
453 return 0;
454 }
455
456 /*
457 *
458 */
459
460 extern int _krb5_AES_string_to_default_iterator;
461
462 static krb5_error_code
463 make_etype_info2_entry(ETYPE_INFO2_ENTRY *ent, Key *key)
464 {
465 ent->etype = key->key.keytype;
466 if(key->salt) {
467 ALLOC(ent->salt);
468 if (ent->salt == NULL)
469 return ENOMEM;
470 *ent->salt = malloc(key->salt->salt.length + 1);
471 if (*ent->salt == NULL) {
472 free(ent->salt);
473 ent->salt = NULL;
474 return ENOMEM;
475 }
476 memcpy(*ent->salt, key->salt->salt.data, key->salt->salt.length);
477 (*ent->salt)[key->salt->salt.length] = '\0';
478 } else
479 ent->salt = NULL;
480
481 ent->s2kparams = NULL;
482
483 switch (key->key.keytype) {
484 case ETYPE_AES128_CTS_HMAC_SHA1_96:
485 case ETYPE_AES256_CTS_HMAC_SHA1_96:
486 ALLOC(ent->s2kparams);
487 if (ent->s2kparams == NULL)
488 return ENOMEM;
489 ent->s2kparams->length = 4;
490 ent->s2kparams->data = malloc(ent->s2kparams->length);
491 if (ent->s2kparams->data == NULL) {
492 free(ent->s2kparams);
493 ent->s2kparams = NULL;
494 return ENOMEM;
495 }
496 _krb5_put_int(ent->s2kparams->data,
497 _krb5_AES_string_to_default_iterator,
498 ent->s2kparams->length);
499 break;
500 case ETYPE_DES_CBC_CRC:
501 case ETYPE_DES_CBC_MD4:
502 case ETYPE_DES_CBC_MD5:
503 /* Check if this was a AFS3 salted key */
504 if(key->salt && key->salt->type == hdb_afs3_salt){
505 ALLOC(ent->s2kparams);
506 if (ent->s2kparams == NULL)
507 return ENOMEM;
508 ent->s2kparams->length = 1;
509 ent->s2kparams->data = malloc(ent->s2kparams->length);
510 if (ent->s2kparams->data == NULL) {
511 free(ent->s2kparams);
512 ent->s2kparams = NULL;
513 return ENOMEM;
514 }
515 _krb5_put_int(ent->s2kparams->data,
516 1,
517 ent->s2kparams->length);
518 }
519 break;
520 default:
521 break;
522 }
523 return 0;
524 }
525
526 /*
527 * Return 1 if the client have only older enctypes, this is for
528 * determining if the server should send ETYPE_INFO2 or not.
529 */
530
531 static int
532 only_older_enctype_p(const KDC_REQ *req)
533 {
534 int i;
535
536 for(i = 0; i < req->req_body.etype.len; i++) {
537 switch (req->req_body.etype.val[i]) {
538 case ETYPE_DES_CBC_CRC:
539 case ETYPE_DES_CBC_MD4:
540 case ETYPE_DES_CBC_MD5:
541 case ETYPE_DES3_CBC_SHA1:
542 case ETYPE_ARCFOUR_HMAC_MD5:
543 case ETYPE_ARCFOUR_HMAC_MD5_56:
544 break;
545 default:
546 return 0;
547 }
548 }
549 return 1;
550 }
551
552 /*
553 *
554 */
555
556 static krb5_error_code
557 get_pa_etype_info2(krb5_context context,
558 krb5_kdc_configuration *config,
559 METHOD_DATA *md, hdb_entry *client,
560 ENCTYPE *etypes, unsigned int etypes_len)
561 {
562 krb5_error_code ret = 0;
563 int i, j;
564 unsigned int n = 0;
565 ETYPE_INFO2 pa;
566 unsigned char *buf;
567 size_t len;
568
569 pa.len = client->keys.len;
570 if(pa.len > UINT_MAX/sizeof(*pa.val))
571 return ERANGE;
572 pa.val = malloc(pa.len * sizeof(*pa.val));
573 if(pa.val == NULL)
574 return ENOMEM;
575 memset(pa.val, 0, pa.len * sizeof(*pa.val));
576
577 for(j = 0; j < etypes_len; j++) {
578 for (i = 0; i < n; i++)
579 if (pa.val[i].etype == etypes[j])
580 goto skip1;
581 for(i = 0; i < client->keys.len; i++) {
582 if(client->keys.val[i].key.keytype == etypes[j]) {
583 if (krb5_enctype_valid(context, etypes[j]) != 0)
584 continue;
585 if((ret = make_etype_info2_entry(&pa.val[n++],
586 &client->keys.val[i])) != 0) {
587 free_ETYPE_INFO2(&pa);
588 return ret;
589 }
590 }
591 }
592 skip1:;
593 }
594 for(i = 0; i < client->keys.len; i++) {
595 for(j = 0; j < etypes_len; j++) {
596 if(client->keys.val[i].key.keytype == etypes[j])
597 goto skip2;
598 }
599 if (krb5_enctype_valid(context, client->keys.val[i].key.keytype) != 0)
600 continue;
601 if((ret = make_etype_info2_entry(&pa.val[n++],
602 &client->keys.val[i])) != 0) {
603 free_ETYPE_INFO2(&pa);
604 return ret;
605 }
606 skip2:;
607 }
608
609 if(n != pa.len) {
610 char *name;
611 ret = krb5_unparse_name(context, client->principal, &name);
612 if (ret)
613 name = "<unparse_name failed>";
614 kdc_log(context, config, 0,
615 "internal error in get_pa_etype_info2(%s): %d != %d",
616 name, n, pa.len);
617 if (ret == 0)
618 free(name);
619 pa.len = n;
620 }
621
622 ASN1_MALLOC_ENCODE(ETYPE_INFO2, buf, len, &pa, &len, ret);
623 free_ETYPE_INFO2(&pa);
624 if(ret)
625 return ret;
626 ret = realloc_method_data(md);
627 if(ret) {
628 free(buf);
629 return ret;
630 }
631 md->val[md->len - 1].padata_type = KRB5_PADATA_ETYPE_INFO2;
632 md->val[md->len - 1].padata_value.length = len;
633 md->val[md->len - 1].padata_value.data = buf;
634 return 0;
635 }
636
637 /*
638 * verify the flags on `client' and `server', returning 0
639 * if they are OK and generating an error messages and returning
640 * and error code otherwise.
641 */
642
643 krb5_error_code
644 _kdc_check_flags(krb5_context context,
645 krb5_kdc_configuration *config,
646 hdb_entry_ex *client_ex, const char *client_name,
647 hdb_entry_ex *server_ex, const char *server_name,
648 krb5_boolean is_as_req)
649 {
650 if(client_ex != NULL) {
651 hdb_entry *client = &client_ex->entry;
652
653 /* check client */
654 if (client->flags.invalid) {
655 kdc_log(context, config, 0,
656 "Client (%s) has invalid bit set", client_name);
657 return KRB5KDC_ERR_POLICY;
658 }
659
660 if(!client->flags.client){
661 kdc_log(context, config, 0,
662 "Principal may not act as client -- %s", client_name);
663 return KRB5KDC_ERR_POLICY;
664 }
665
666 if (client->valid_start && *client->valid_start > kdc_time) {
667 char starttime_str[100];
668 krb5_format_time(context, *client->valid_start,
669 starttime_str, sizeof(starttime_str), TRUE);
670 kdc_log(context, config, 0,
671 "Client not yet valid until %s -- %s",
672 starttime_str, client_name);
673 return KRB5KDC_ERR_CLIENT_NOTYET;
674 }
675
676 if (client->valid_end && *client->valid_end < kdc_time) {
677 char endtime_str[100];
678 krb5_format_time(context, *client->valid_end,
679 endtime_str, sizeof(endtime_str), TRUE);
680 kdc_log(context, config, 0,
681 "Client expired at %s -- %s",
682 endtime_str, client_name);
683 return KRB5KDC_ERR_NAME_EXP;
684 }
685
686 if (client->pw_end && *client->pw_end < kdc_time
687 && (server_ex == NULL || !server_ex->entry.flags.change_pw)) {
688 char pwend_str[100];
689 krb5_format_time(context, *client->pw_end,
690 pwend_str, sizeof(pwend_str), TRUE);
691 kdc_log(context, config, 0,
692 "Client's key has expired at %s -- %s",
693 pwend_str, client_name);
694 return KRB5KDC_ERR_KEY_EXPIRED;
695 }
696 }
697
698 /* check server */
699
700 if (server_ex != NULL) {
701 hdb_entry *server = &server_ex->entry;
702
703 if (server->flags.invalid) {
704 kdc_log(context, config, 0,
705 "Server has invalid flag set -- %s", server_name);
706 return KRB5KDC_ERR_POLICY;
707 }
708
709 if(!server->flags.server){
710 kdc_log(context, config, 0,
711 "Principal may not act as server -- %s", server_name);
712 return KRB5KDC_ERR_POLICY;
713 }
714
715 if(!is_as_req && server->flags.initial) {
716 kdc_log(context, config, 0,
717 "AS-REQ is required for server -- %s", server_name);
718 return KRB5KDC_ERR_POLICY;
719 }
720
721 if (server->valid_start && *server->valid_start > kdc_time) {
722 char starttime_str[100];
723 krb5_format_time(context, *server->valid_start,
724 starttime_str, sizeof(starttime_str), TRUE);
725 kdc_log(context, config, 0,
726 "Server not yet valid until %s -- %s",
727 starttime_str, server_name);
728 return KRB5KDC_ERR_SERVICE_NOTYET;
729 }
730
731 if (server->valid_end && *server->valid_end < kdc_time) {
732 char endtime_str[100];
733 krb5_format_time(context, *server->valid_end,
734 endtime_str, sizeof(endtime_str), TRUE);
735 kdc_log(context, config, 0,
736 "Server expired at %s -- %s",
737 endtime_str, server_name);
738 return KRB5KDC_ERR_SERVICE_EXP;
739 }
740
741 if (server->pw_end && *server->pw_end < kdc_time) {
742 char pwend_str[100];
743 krb5_format_time(context, *server->pw_end,
744 pwend_str, sizeof(pwend_str), TRUE);
745 kdc_log(context, config, 0,
746 "Server's key has expired at -- %s",
747 pwend_str, server_name);
748 return KRB5KDC_ERR_KEY_EXPIRED;
749 }
750 }
751 return 0;
752 }
753
754 /*
755 * Return TRUE if `from' is part of `addresses' taking into consideration
756 * the configuration variables that tells us how strict we should be about
757 * these checks
758 */
759
760 krb5_boolean
761 _kdc_check_addresses(krb5_context context,
762 krb5_kdc_configuration *config,
763 HostAddresses *addresses, const struct sockaddr *from)
764 {
765 krb5_error_code ret;
766 krb5_address addr;
767 krb5_boolean result;
768 krb5_boolean only_netbios = TRUE;
769 int i;
770
771 if(config->check_ticket_addresses == 0)
772 return TRUE;
773
774 if(addresses == NULL)
775 return config->allow_null_ticket_addresses;
776
777 for (i = 0; i < addresses->len; ++i) {
778 if (addresses->val[i].addr_type != KRB5_ADDRESS_NETBIOS) {
779 only_netbios = FALSE;
780 }
781 }
782
783 /* Windows sends it's netbios name, which I can only assume is
784 * used for the 'allowed workstations' check. This is painful,
785 * but we still want to check IP addresses if they happen to be
786 * present.
787 */
788
789 if(only_netbios)
790 return config->allow_null_ticket_addresses;
791
792 ret = krb5_sockaddr2address (context, from, &addr);
793 if(ret)
794 return FALSE;
795
796 result = krb5_address_search(context, &addr, addresses);
797 krb5_free_address (context, &addr);
798 return result;
799 }
800
801 krb5_error_code
802 _kdc_as_rep(krb5_context context,
803 krb5_kdc_configuration *config,
804 KDC_REQ *req,
805 const krb5_data *req_buffer,
806 krb5_data *reply,
807 const char *from,
808 struct sockaddr *from_addr,
809 int datagram_reply)
810 {
811 KDC_REQ_BODY *b = &req->req_body;
812 AS_REP rep;
813 KDCOptions f = b->kdc_options;
814 hdb_entry_ex *client = NULL, *server = NULL;
815 krb5_enctype cetype, setype, sessionetype;
816 EncTicketPart et;
817 EncKDCRepPart ek;
818 krb5_principal client_princ = NULL, server_princ = NULL;
819 char *client_name = NULL, *server_name = NULL;
820 krb5_error_code ret = 0;
821 const char *e_text = NULL;
822 krb5_crypto crypto;
823 Key *ckey, *skey;
824 EncryptionKey *reply_key;
825 #ifdef PKINIT
826 pk_client_params *pkp = NULL;
827 #endif
828
829 memset(&rep, 0, sizeof(rep));
830
831 if(b->sname == NULL){
832 ret = KRB5KRB_ERR_GENERIC;
833 e_text = "No server in request";
834 } else{
835 _krb5_principalname2krb5_principal (context,
836 &server_princ,
837 *(b->sname),
838 b->realm);
839 ret = krb5_unparse_name(context, server_princ, &server_name);
840 }
841 if (ret) {
842 kdc_log(context, config, 0,
843 "AS-REQ malformed server name from %s", from);
844 goto out;
845 }
846
847 if(b->cname == NULL){
848 ret = KRB5KRB_ERR_GENERIC;
849 e_text = "No client in request";
850 } else {
851 _krb5_principalname2krb5_principal (context,
852 &client_princ,
853 *(b->cname),
854 b->realm);
855 ret = krb5_unparse_name(context, client_princ, &client_name);
856 }
857 if (ret) {
858 kdc_log(context, config, 0,
859 "AS-REQ malformed client name from %s", from);
860 goto out;
861 }
862
863 kdc_log(context, config, 0, "AS-REQ %s from %s for %s",
864 client_name, from, server_name);
865
866 ret = _kdc_db_fetch(context, config, client_princ,
867 HDB_F_GET_CLIENT, NULL, &client);
868 if(ret){
869 kdc_log(context, config, 0, "UNKNOWN -- %s: %s", client_name,
870 krb5_get_err_text(context, ret));
871 ret = KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN;
872 goto out;
873 }
874
875 ret = _kdc_db_fetch(context, config, server_princ,
876 HDB_F_GET_SERVER|HDB_F_GET_KRBTGT,
877 NULL, &server);
878 if(ret){
879 kdc_log(context, config, 0, "UNKNOWN -- %s: %s", server_name,
880 krb5_get_err_text(context, ret));
881 ret = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
882 goto out;
883 }
884
885 ret = _kdc_check_flags(context, config,
886 client, client_name,
887 server, server_name,
888 TRUE);
889 if(ret)
890 goto out;
891
892 if (client->check_client_access) {
893 ret = client->check_client_access(context, client,
894 b->addresses);
895 if(ret)
896 goto out;
897 }
898
899 memset(&et, 0, sizeof(et));
900 memset(&ek, 0, sizeof(ek));
901
902 if(req->padata){
903 int i;
904 PA_DATA *pa;
905 int found_pa = 0;
906
907 log_patypes(context, config, req->padata);
908
909 #ifdef PKINIT
910 kdc_log(context, config, 5,
911 "Looking for PKINIT pa-data -- %s", client_name);
912
913 e_text = "No PKINIT PA found";
914
915 i = 0;
916 if ((pa = _kdc_find_padata(req, &i, KRB5_PADATA_PK_AS_REQ)))
917 ;
918 if (pa == NULL) {
919 i = 0;
920 if((pa = _kdc_find_padata(req, &i, KRB5_PADATA_PK_AS_REQ_WIN)))
921 ;
922 }
923 if (pa) {
924 char *client_cert = NULL;
925
926 ret = _kdc_pk_rd_padata(context, config, req, pa, &pkp);
927 if (ret) {
928 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
929 kdc_log(context, config, 5,
930 "Failed to decode PKINIT PA-DATA -- %s",
931 client_name);
932 goto ts_enc;
933 }
934 if (ret == 0 && pkp == NULL)
935 goto ts_enc;
936
937 ret = _kdc_pk_check_client(context,
938 config,
939 client,
940 pkp,
941 &client_cert);
942 if (ret) {
943 e_text = "PKINIT certificate not allowed to "
944 "impersonate principal";
945 _kdc_pk_free_client_param(context, pkp);
946
947 kdc_log(context, config, 0, "%s", e_text);
948 pkp = NULL;
949 goto ts_enc;
950 }
951 found_pa = 1;
952 et.flags.pre_authent = 1;
953 kdc_log(context, config, 0,
954 "PKINIT pre-authentication succeeded -- %s using %s",
955 client_name, client_cert);
956 free(client_cert);
957 if (pkp)
958 goto preauth_done;
959 }
960 ts_enc:
961 #endif
962 kdc_log(context, config, 5, "Looking for ENC-TS pa-data -- %s",
963 client_name);
964
965 i = 0;
966 e_text = "No ENC-TS found";
967 while((pa = _kdc_find_padata(req, &i, KRB5_PADATA_ENC_TIMESTAMP))){
968 krb5_data ts_data;
969 PA_ENC_TS_ENC p;
970 size_t len;
971 EncryptedData enc_data;
972 Key *pa_key;
973 char *str;
974
975 found_pa = 1;
976
977 ret = decode_EncryptedData(pa->padata_value.data,
978 pa->padata_value.length,
979 &enc_data,
980 &len);
981 if (ret) {
982 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
983 kdc_log(context, config, 5, "Failed to decode PA-DATA -- %s",
984 client_name);
985 goto out;
986 }
987
988 ret = hdb_enctype2key(context, &client->entry,
989 enc_data.etype, &pa_key);
990 if(ret){
991 char *estr;
992 e_text = "No key matches pa-data";
993 ret = KRB5KDC_ERR_PREAUTH_FAILED;
994 if(krb5_enctype_to_string(context, enc_data.etype, &estr))
995 estr = NULL;
996 if(estr == NULL)
997 kdc_log(context, config, 5,
998 "No client key matching pa-data (%d) -- %s",
999 enc_data.etype, client_name);
1000 else
1001 kdc_log(context, config, 5,
1002 "No client key matching pa-data (%s) -- %s",
1003 estr, client_name);
1004 free(estr);
1005
1006 free_EncryptedData(&enc_data);
1007 continue;
1008 }
1009
1010 try_next_key:
1011 ret = krb5_crypto_init(context, &pa_key->key, 0, &crypto);
1012 if (ret) {
1013 kdc_log(context, config, 0, "krb5_crypto_init failed: %s",
1014 krb5_get_err_text(context, ret));
1015 free_EncryptedData(&enc_data);
1016 continue;
1017 }
1018
1019 ret = krb5_decrypt_EncryptedData (context,
1020 crypto,
1021 KRB5_KU_PA_ENC_TIMESTAMP,
1022 &enc_data,
1023 &ts_data);
1024 krb5_crypto_destroy(context, crypto);
1025 if(ret){
1026 krb5_error_code ret2;
1027 ret2 = krb5_enctype_to_string(context,
1028 pa_key->key.keytype, &str);
1029 if (ret2)
1030 str = NULL;
1031 kdc_log(context, config, 5,
1032 "Failed to decrypt PA-DATA -- %s "
1033 "(enctype %s) error %s",
1034 client_name,
1035 str ? str : "unknown enctype",
1036 krb5_get_err_text(context, ret));
1037 free(str);
1038
1039 if(hdb_next_enctype2key(context, &client->entry,
1040 enc_data.etype, &pa_key) == 0)
1041 goto try_next_key;
1042 e_text = "Failed to decrypt PA-DATA";
1043
1044 free_EncryptedData(&enc_data);
1045 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1046 continue;
1047 }
1048 free_EncryptedData(&enc_data);
1049 ret = decode_PA_ENC_TS_ENC(ts_data.data,
1050 ts_data.length,
1051 &p,
1052 &len);
1053 krb5_data_free(&ts_data);
1054 if(ret){
1055 e_text = "Failed to decode PA-ENC-TS-ENC";
1056 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1057 kdc_log(context, config,
1058 5, "Failed to decode PA-ENC-TS_ENC -- %s",
1059 client_name);
1060 continue;
1061 }
1062 free_PA_ENC_TS_ENC(&p);
1063 if (abs(kdc_time - p.patimestamp) > context->max_skew) {
1064 char client_time[100];
1065
1066 krb5_format_time(context, p.patimestamp,
1067 client_time, sizeof(client_time), TRUE);
1068
1069 ret = KRB5KRB_AP_ERR_SKEW;
1070 kdc_log(context, config, 0,
1071 "Too large time skew, "
1072 "client time %s is out by %u > %u seconds -- %s",
1073 client_time,
1074 (unsigned)abs(kdc_time - p.patimestamp),
1075 context->max_skew,
1076 client_name);
1077 /*
1078 * the following is needed to make windows clients
1079 * to retry using the timestamp in the error message
1080 *
1081 * this is maybe a bug in windows to not trying when e_text
1082 * is present...
1083 */
1084 e_text = NULL;
1085 goto out;
1086 }
1087 et.flags.pre_authent = 1;
1088
1089 ret = krb5_enctype_to_string(context,pa_key->key.keytype, &str);
1090 if (ret)
1091 str = NULL;
1092
1093 kdc_log(context, config, 2,
1094 "ENC-TS Pre-authentication succeeded -- %s using %s",
1095 client_name, str ? str : "unknown enctype");
1096 free(str);
1097 break;
1098 }
1099 #ifdef PKINIT
1100 preauth_done:
1101 #endif
1102 if(found_pa == 0 && config->require_preauth)
1103 goto use_pa;
1104 /* We come here if we found a pa-enc-timestamp, but if there
1105 was some problem with it, other than too large skew */
1106 if(found_pa && et.flags.pre_authent == 0){
1107 kdc_log(context, config, 0, "%s -- %s", e_text, client_name);
1108 e_text = NULL;
1109 goto out;
1110 }
1111 }else if (config->require_preauth
1112 || client->entry.flags.require_preauth
1113 || server->entry.flags.require_preauth) {
1114 METHOD_DATA method_data;
1115 PA_DATA *pa;
1116 unsigned char *buf;
1117 size_t len;
1118 krb5_data foo_data;
1119
1120 use_pa:
1121 method_data.len = 0;
1122 method_data.val = NULL;
1123
1124 ret = realloc_method_data(&method_data);
1125 pa = &method_data.val[method_data.len-1];
1126 pa->padata_type = KRB5_PADATA_ENC_TIMESTAMP;
1127 pa->padata_value.length = 0;
1128 pa->padata_value.data = NULL;
1129
1130 #ifdef PKINIT
1131 ret = realloc_method_data(&method_data);
1132 pa = &method_data.val[method_data.len-1];
1133 pa->padata_type = KRB5_PADATA_PK_AS_REQ;
1134 pa->padata_value.length = 0;
1135 pa->padata_value.data = NULL;
1136 #endif
1137
1138 /*
1139 * RFC4120 requires:
1140 * - If the client only knows about old enctypes, then send
1141 * both info replies (we send 'info' first in the list).
1142 * - If the client is 'modern', because it knows about 'new'
1143 * enctype types, then only send the 'info2' reply.
1144 */
1145
1146 /* XXX check ret */
1147 if (only_older_enctype_p(req))
1148 ret = get_pa_etype_info(context, config,
1149 &method_data, &client->entry,
1150 b->etype.val, b->etype.len);
1151 /* XXX check ret */
1152 ret = get_pa_etype_info2(context, config, &method_data,
1153 &client->entry, b->etype.val, b->etype.len);
1154
1155
1156 ASN1_MALLOC_ENCODE(METHOD_DATA, buf, len, &method_data, &len, ret);
1157 free_METHOD_DATA(&method_data);
1158 foo_data.data = buf;
1159 foo_data.length = len;
1160
1161 ret = KRB5KDC_ERR_PREAUTH_REQUIRED;
1162 krb5_mk_error(context,
1163 ret,
1164 "Need to use PA-ENC-TIMESTAMP/PA-PK-AS-REQ",
1165 &foo_data,
1166 client_princ,
1167 server_princ,
1168 NULL,
1169 NULL,
1170 reply);
1171 free(buf);
1172 kdc_log(context, config, 0,
1173 "No preauth found, returning PREAUTH-REQUIRED -- %s",
1174 client_name);
1175 ret = 0;
1176 goto out2;
1177 }
1178
1179 /*
1180 * Find the client key (for preauth ENC-TS verification and reply
1181 * encryption). Then the best encryption type for the KDC and
1182 * last the best session key that shared between the client and
1183 * KDC runtime enctypes.
1184 */
1185
1186 ret = _kdc_find_etype(context, client, b->etype.val, b->etype.len,
1187 &ckey, &cetype);
1188 if (ret) {
1189 kdc_log(context, config, 0,
1190 "Client (%s) has no support for etypes", client_name);
1191 goto out;
1192 }
1193
1194 ret = _kdc_get_preferred_key(context, config,
1195 server, server_name,
1196 &setype, &skey);
1197 if(ret)
1198 goto out;
1199
1200 {
1201 const krb5_enctype *p;
1202 int i, j;
1203
1204 p = krb5_kerberos_enctypes(context);
1205
1206 sessionetype = ETYPE_NULL;
1207
1208 for (i = 0; p[i] != ETYPE_NULL && sessionetype == ETYPE_NULL; i++) {
1209 if (krb5_enctype_valid(context, p[i]) != 0)
1210 continue;
1211 for (j = 0; j < b->etype.len; j++) {
1212 if (p[i] == b->etype.val[j]) {
1213 sessionetype = p[i];
1214 break;
1215 }
1216 }
1217 }
1218 if (sessionetype == ETYPE_NULL) {
1219 kdc_log(context, config, 0,
1220 "Client (%s) from %s has no common enctypes with KDC"
1221 "to use for the session key",
1222 client_name, from);
1223 goto out;
1224 }
1225 }
1226
1227 {
1228 struct rk_strpool *p = NULL;
1229 char *str;
1230 int i;
1231
1232 for (i = 0; i < b->etype.len; i++) {
1233 ret = krb5_enctype_to_string(context, b->etype.val[i], &str);
1234 if (ret == 0) {
1235 p = rk_strpoolprintf(p, "%s", str);
1236 free(str);
1237 } else
1238 p = rk_strpoolprintf(p, "%d", b->etype.val[i]);
1239 if (p && i + 1 < b->etype.len)
1240 p = rk_strpoolprintf(p, ", ");
1241 if (p == NULL) {
1242 kdc_log(context, config, 0, "out of memory");
1243 goto out;
1244 }
1245 }
1246 if (p == NULL)
1247 p = rk_strpoolprintf(p, "no encryption types");
1248
1249 str = rk_strpoolcollect(p);
1250 kdc_log(context, config, 0, "Client supported enctypes: %s", str);
1251 free(str);
1252 }
1253 {
1254 char *cet;
1255 char *set;
1256
1257 ret = krb5_enctype_to_string(context, cetype, &cet);
1258 if(ret == 0) {
1259 ret = krb5_enctype_to_string(context, setype, &set);
1260 if (ret == 0) {
1261 kdc_log(context, config, 5, "Using %s/%s", cet, set);
1262 free(set);
1263 }
1264 free(cet);
1265 }
1266 if (ret != 0)
1267 kdc_log(context, config, 5, "Using e-types %d/%d", cetype, setype);
1268 }
1269
1270 {
1271 char str[128];
1272 unparse_flags(KDCOptions2int(f), asn1_KDCOptions_units(),
1273 str, sizeof(str));
1274 if(*str)
1275 kdc_log(context, config, 2, "Requested flags: %s", str);
1276 }
1277
1278
1279 if(f.renew || f.validate || f.proxy || f.forwarded || f.enc_tkt_in_skey
1280 || (f.request_anonymous && !config->allow_anonymous)) {
1281 ret = KRB5KDC_ERR_BADOPTION;
1282 kdc_log(context, config, 0, "Bad KDC options -- %s", client_name);
1283 goto out;
1284 }
1285
1286 rep.pvno = 5;
1287 rep.msg_type = krb_as_rep;
1288 copy_Realm(&client->entry.principal->realm, &rep.crealm);
1289 if (f.request_anonymous)
1290 _kdc_make_anonymous_principalname (&rep.cname);
1291 else
1292 _krb5_principal2principalname(&rep.cname,
1293 client->entry.principal);
1294 rep.ticket.tkt_vno = 5;
1295 copy_Realm(&server->entry.principal->realm, &rep.ticket.realm);
1296 _krb5_principal2principalname(&rep.ticket.sname,
1297 server->entry.principal);
1298
1299 et.flags.initial = 1;
1300 if(client->entry.flags.forwardable && server->entry.flags.forwardable)
1301 et.flags.forwardable = f.forwardable;
1302 else if (f.forwardable) {
1303 ret = KRB5KDC_ERR_POLICY;
1304 kdc_log(context, config, 0,
1305 "Ticket may not be forwardable -- %s", client_name);
1306 goto out;
1307 }
1308 if(client->entry.flags.proxiable && server->entry.flags.proxiable)
1309 et.flags.proxiable = f.proxiable;
1310 else if (f.proxiable) {
1311 ret = KRB5KDC_ERR_POLICY;
1312 kdc_log(context, config, 0,
1313 "Ticket may not be proxiable -- %s", client_name);
1314 goto out;
1315 }
1316 if(client->entry.flags.postdate && server->entry.flags.postdate)
1317 et.flags.may_postdate = f.allow_postdate;
1318 else if (f.allow_postdate){
1319 ret = KRB5KDC_ERR_POLICY;
1320 kdc_log(context, config, 0,
1321 "Ticket may not be postdatable -- %s", client_name);
1322 goto out;
1323 }
1324
1325 /* check for valid set of addresses */
1326 if(!_kdc_check_addresses(context, config, b->addresses, from_addr)) {
1327 ret = KRB5KRB_AP_ERR_BADADDR;
1328 kdc_log(context, config, 0,
1329 "Bad address list requested -- %s", client_name);
1330 goto out;
1331 }
1332
1333 krb5_generate_random_keyblock(context, sessionetype, &et.key);
1334 copy_PrincipalName(&rep.cname, &et.cname);
1335 copy_Realm(&rep.crealm, &et.crealm);
1336
1337 {
1338 time_t start;
1339 time_t t;
1340
1341 start = et.authtime = kdc_time;
1342
1343 if(f.postdated && req->req_body.from){
1344 ALLOC(et.starttime);
1345 start = *et.starttime = *req->req_body.from;
1346 et.flags.invalid = 1;
1347 et.flags.postdated = 1; /* XXX ??? */
1348 }
1349 _kdc_fix_time(&b->till);
1350 t = *b->till;
1351
1352 /* be careful not overflowing */
1353
1354 if(client->entry.max_life)
1355 t = start + min(t - start, *client->entry.max_life);
1356 if(server->entry.max_life)
1357 t = start + min(t - start, *server->entry.max_life);
1358 #if 0
1359 t = min(t, start + realm->max_life);
1360 #endif
1361 et.endtime = t;
1362 if(f.renewable_ok && et.endtime < *b->till){
1363 f.renewable = 1;
1364 if(b->rtime == NULL){
1365 ALLOC(b->rtime);
1366 *b->rtime = 0;
1367 }
1368 if(*b->rtime < *b->till)
1369 *b->rtime = *b->till;
1370 }
1371 if(f.renewable && b->rtime){
1372 t = *b->rtime;
1373 if(t == 0)
1374 t = MAX_TIME;
1375 if(client->entry.max_renew)
1376 t = start + min(t - start, *client->entry.max_renew);
1377 if(server->entry.max_renew)
1378 t = start + min(t - start, *server->entry.max_renew);
1379 #if 0
1380 t = min(t, start + realm->max_renew);
1381 #endif
1382 ALLOC(et.renew_till);
1383 *et.renew_till = t;
1384 et.flags.renewable = 1;
1385 }
1386 }
1387
1388 if (f.request_anonymous)
1389 et.flags.anonymous = 1;
1390
1391 if(b->addresses){
1392 ALLOC(et.caddr);
1393 copy_HostAddresses(b->addresses, et.caddr);
1394 }
1395
1396 et.transited.tr_type = DOMAIN_X500_COMPRESS;
1397 krb5_data_zero(&et.transited.contents);
1398
1399 copy_EncryptionKey(&et.key, &ek.key);
1400
1401 /* The MIT ASN.1 library (obviously) doesn't tell lengths encoded
1402 * as 0 and as 0x80 (meaning indefinite length) apart, and is thus
1403 * incapable of correctly decoding SEQUENCE OF's of zero length.
1404 *
1405 * To fix this, always send at least one no-op last_req
1406 *
1407 * If there's a pw_end or valid_end we will use that,
1408 * otherwise just a dummy lr.
1409 */
1410 ek.last_req.val = malloc(2 * sizeof(*ek.last_req.val));
1411 ek.last_req.len = 0;
1412 if (client->entry.pw_end
1413 && (config->kdc_warn_pwexpire == 0
1414 || kdc_time + config->kdc_warn_pwexpire >= *client->entry.pw_end)) {
1415 ek.last_req.val[ek.last_req.len].lr_type = LR_PW_EXPTIME;
1416 ek.last_req.val[ek.last_req.len].lr_value = *client->entry.pw_end;
1417 ++ek.last_req.len;
1418 }
1419 if (client->entry.valid_end) {
1420 ek.last_req.val[ek.last_req.len].lr_type = LR_ACCT_EXPTIME;
1421 ek.last_req.val[ek.last_req.len].lr_value = *client->entry.valid_end;
1422 ++ek.last_req.len;
1423 }
1424 if (ek.last_req.len == 0) {
1425 ek.last_req.val[ek.last_req.len].lr_type = LR_NONE;
1426 ek.last_req.val[ek.last_req.len].lr_value = 0;
1427 ++ek.last_req.len;
1428 }
1429 ek.nonce = b->nonce;
1430 if (client->entry.valid_end || client->entry.pw_end) {
1431 ALLOC(ek.key_expiration);
1432 if (client->entry.valid_end) {
1433 if (client->entry.pw_end)
1434 *ek.key_expiration = min(*client->entry.valid_end,
1435 *client->entry.pw_end);
1436 else
1437 *ek.key_expiration = *client->entry.valid_end;
1438 } else
1439 *ek.key_expiration = *client->entry.pw_end;
1440 } else
1441 ek.key_expiration = NULL;
1442 ek.flags = et.flags;
1443 ek.authtime = et.authtime;
1444 if (et.starttime) {
1445 ALLOC(ek.starttime);
1446 *ek.starttime = *et.starttime;
1447 }
1448 ek.endtime = et.endtime;
1449 if (et.renew_till) {
1450 ALLOC(ek.renew_till);
1451 *ek.renew_till = *et.renew_till;
1452 }
1453 copy_Realm(&rep.ticket.realm, &ek.srealm);
1454 copy_PrincipalName(&rep.ticket.sname, &ek.sname);
1455 if(et.caddr){
1456 ALLOC(ek.caddr);
1457 copy_HostAddresses(et.caddr, ek.caddr);
1458 }
1459
1460 ALLOC(rep.padata);
1461 rep.padata->len = 0;
1462 rep.padata->val = NULL;
1463
1464 reply_key = &ckey->key;
1465 #if PKINIT
1466 if (pkp) {
1467 ret = _kdc_pk_mk_pa_reply(context, config, pkp, client,
1468 req, req_buffer,
1469 &reply_key, rep.padata);
1470 if (ret)
1471 goto out;
1472 }
1473 #endif
1474
1475 set_salt_padata (rep.padata, ckey->salt);
1476
1477 if (rep.padata->len == 0) {
1478 free(rep.padata);
1479 rep.padata = NULL;
1480 }
1481
1482 /* Add the PAC, via a HDB abstraction */
1483 if (client->authz_data_as_req) {
1484 ret = client->authz_data_as_req(context, client,
1485 req->padata,
1486 et.authtime,
1487 &skey->key,
1488 &et.key,
1489 &et.authorization_data);
1490 if (ret)
1491 goto out;
1492 }
1493
1494 _kdc_log_timestamp(context, config, "AS-REQ", et.authtime, et.starttime,
1495 et.endtime, et.renew_till);
1496
1497 /* do this as the last thing since this signs the EncTicketPart */
1498 ret = _kdc_add_KRB5SignedPath(context,
1499 config,
1500 server,
1501 setype,
1502 NULL,
1503 NULL,
1504 &et);
1505 if (ret)
1506 goto out;
1507
1508 ret = _kdc_encode_reply(context, config,
1509 &rep, &et, &ek, setype, server->entry.kvno,
1510 &skey->key, client->entry.kvno,
1511 reply_key, &e_text, reply);
1512 free_EncTicketPart(&et);
1513 free_EncKDCRepPart(&ek);
1514 if (ret)
1515 goto out;
1516
1517 /* */
1518 if (datagram_reply && reply->length > config->max_datagram_reply_length) {
1519 krb5_data_free(reply);
1520 ret = KRB5KRB_ERR_RESPONSE_TOO_BIG;
1521 e_text = "Reply packet too large";
1522 }
1523
1524 out:
1525 free_AS_REP(&rep);
1526 if(ret){
1527 krb5_mk_error(context,
1528 ret,
1529 e_text,
1530 NULL,
1531 client_princ,
1532 server_princ,
1533 NULL,
1534 NULL,
1535 reply);
1536 ret = 0;
1537 }
1538 out2:
1539 #ifdef PKINIT
1540 if (pkp)
1541 _kdc_pk_free_client_param(context, pkp);
1542 #endif
1543 if (client_princ)
1544 krb5_free_principal(context, client_princ);
1545 free(client_name);
1546 if (server_princ)
1547 krb5_free_principal(context, server_princ);
1548 free(server_name);
1549 if(client)
1550 _kdc_free_ent(context, client);
1551 if(server)
1552 _kdc_free_ent(context, server);
1553 return ret;
1554 }
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