2 * Copyright (c) 1997-2007 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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.
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.
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
36 RCSID("$Id: kerberos5.c 21040 2007-06-10 06:20:59Z lha $");
38 #define MAX_TIME ((time_t)((1U << 31) - 1))
41 _kdc_fix_time(time_t **t)
47 if(**t == 0) **t = MAX_TIME; /* fix for old clients */
51 realloc_method_data(METHOD_DATA *md)
54 pa = realloc(md->val, (md->len + 1) * sizeof(*md->val));
63 set_salt_padata (METHOD_DATA *md, Salt *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);
74 _kdc_find_padata(const KDC_REQ *req, int *start, int type)
76 if (req->padata == NULL)
79 while(*start < req->padata->len){
81 if(req->padata->val[*start - 1].padata_type == type)
82 return &req->padata->val[*start - 1];
88 * return the first appropriate key of `princ' in `ret_key'. Look for
89 * all the etypes in (`etypes', `len'), stopping as soon as we find
90 * one, but preferring one that has default salt
94 _kdc_find_etype(krb5_context context, const hdb_entry_ex *princ,
95 krb5_enctype *etypes, unsigned len,
96 Key **ret_key, krb5_enctype *ret_etype)
99 krb5_error_code ret = KRB5KDC_ERR_ETYPE_NOSUPP;
101 for(i = 0; ret != 0 && i < len ; i++) {
104 if (krb5_enctype_valid(context, etypes[i]) != 0)
107 while (hdb_next_enctype2key(context, &princ->entry, etypes[i], &key) == 0) {
108 if (key->key.keyvalue.length == 0) {
109 ret = KRB5KDC_ERR_NULL_KEY;
113 *ret_etype = etypes[i];
115 if (key->salt == NULL)
123 _kdc_make_anonymous_principalname (PrincipalName *pn)
125 pn->name_type = KRB5_NT_PRINCIPAL;
126 pn->name_string.len = 1;
127 pn->name_string.val = malloc(sizeof(*pn->name_string.val));
128 if (pn->name_string.val == NULL)
130 pn->name_string.val[0] = strdup("anonymous");
131 if (pn->name_string.val[0] == NULL) {
132 free(pn->name_string.val);
133 pn->name_string.val = NULL;
140 _kdc_log_timestamp(krb5_context context,
141 krb5_kdc_configuration *config,
143 KerberosTime authtime, KerberosTime *starttime,
144 KerberosTime endtime, KerberosTime *renew_till)
146 char authtime_str[100], starttime_str[100],
147 endtime_str[100], renewtime_str[100];
149 krb5_format_time(context, authtime,
150 authtime_str, sizeof(authtime_str), TRUE);
152 krb5_format_time(context, *starttime,
153 starttime_str, sizeof(starttime_str), TRUE);
155 strlcpy(starttime_str, "unset", sizeof(starttime_str));
156 krb5_format_time(context, endtime,
157 endtime_str, sizeof(endtime_str), TRUE);
159 krb5_format_time(context, *renew_till,
160 renewtime_str, sizeof(renewtime_str), TRUE);
162 strlcpy(renewtime_str, "unset", sizeof(renewtime_str));
164 kdc_log(context, config, 5,
165 "%s authtime: %s starttime: %s endtime: %s renew till: %s",
166 type, authtime_str, starttime_str, endtime_str, renewtime_str);
170 log_patypes(krb5_context context,
171 krb5_kdc_configuration *config,
174 struct rk_strpool *p = NULL;
178 for (i = 0; i < padata->len; i++) {
179 switch(padata->val[i].padata_type) {
180 case KRB5_PADATA_PK_AS_REQ:
181 p = rk_strpoolprintf(p, "PK-INIT(ietf)");
183 case KRB5_PADATA_PK_AS_REQ_WIN:
184 p = rk_strpoolprintf(p, "PK-INIT(win2k)");
186 case KRB5_PADATA_PA_PK_OCSP_RESPONSE:
187 p = rk_strpoolprintf(p, "OCSP");
189 case KRB5_PADATA_ENC_TIMESTAMP:
190 p = rk_strpoolprintf(p, "encrypted-timestamp");
193 p = rk_strpoolprintf(p, "%d", padata->val[i].padata_type);
196 if (p && i + 1 < padata->len)
197 p = rk_strpoolprintf(p, ", ");
199 kdc_log(context, config, 0, "out of memory");
204 p = rk_strpoolprintf(p, "none");
206 str = rk_strpoolcollect(p);
207 kdc_log(context, config, 0, "Client sent patypes: %s", str);
217 _kdc_encode_reply(krb5_context context,
218 krb5_kdc_configuration *config,
219 KDC_REP *rep, const EncTicketPart *et, EncKDCRepPart *ek,
221 int skvno, const EncryptionKey *skey,
222 int ckvno, const EncryptionKey *ckey,
232 ASN1_MALLOC_ENCODE(EncTicketPart, buf, buf_size, et, &len, ret);
234 kdc_log(context, config, 0, "Failed to encode ticket: %s",
235 krb5_get_err_text(context, ret));
238 if(buf_size != len) {
240 kdc_log(context, config, 0, "Internal error in ASN.1 encoder");
241 *e_text = "KDC internal error";
242 return KRB5KRB_ERR_GENERIC;
245 ret = krb5_crypto_init(context, skey, etype, &crypto);
248 kdc_log(context, config, 0, "krb5_crypto_init failed: %s",
249 krb5_get_err_text(context, ret));
253 ret = krb5_encrypt_EncryptedData(context,
259 &rep->ticket.enc_part);
261 krb5_crypto_destroy(context, crypto);
263 kdc_log(context, config, 0, "Failed to encrypt data: %s",
264 krb5_get_err_text(context, ret));
268 if(rep->msg_type == krb_as_rep && !config->encode_as_rep_as_tgs_rep)
269 ASN1_MALLOC_ENCODE(EncASRepPart, buf, buf_size, ek, &len, ret);
271 ASN1_MALLOC_ENCODE(EncTGSRepPart, buf, buf_size, ek, &len, ret);
273 kdc_log(context, config, 0, "Failed to encode KDC-REP: %s",
274 krb5_get_err_text(context, ret));
277 if(buf_size != len) {
279 kdc_log(context, config, 0, "Internal error in ASN.1 encoder");
280 *e_text = "KDC internal error";
281 return KRB5KRB_ERR_GENERIC;
283 ret = krb5_crypto_init(context, ckey, 0, &crypto);
286 kdc_log(context, config, 0, "krb5_crypto_init failed: %s",
287 krb5_get_err_text(context, ret));
290 if(rep->msg_type == krb_as_rep) {
291 krb5_encrypt_EncryptedData(context,
293 KRB5_KU_AS_REP_ENC_PART,
299 ASN1_MALLOC_ENCODE(AS_REP, buf, buf_size, rep, &len, ret);
301 krb5_encrypt_EncryptedData(context,
303 KRB5_KU_TGS_REP_ENC_PART_SESSION,
309 ASN1_MALLOC_ENCODE(TGS_REP, buf, buf_size, rep, &len, ret);
311 krb5_crypto_destroy(context, crypto);
313 kdc_log(context, config, 0, "Failed to encode KDC-REP: %s",
314 krb5_get_err_text(context, ret));
317 if(buf_size != len) {
319 kdc_log(context, config, 0, "Internal error in ASN.1 encoder");
320 *e_text = "KDC internal error";
321 return KRB5KRB_ERR_GENERIC;
324 reply->length = buf_size;
328 static krb5_error_code
329 make_etype_info_entry(krb5_context context, ETYPE_INFO_ENTRY *ent, Key *key)
331 ent->etype = key->key.keytype;
334 ALLOC(ent->salttype);
336 if(key->salt->type == hdb_pw_salt)
337 *ent->salttype = 0; /* or 1? or NULL? */
338 else if(key->salt->type == hdb_afs3_salt)
341 kdc_log(context, config, 0, "unknown salt-type: %d",
343 return KRB5KRB_ERR_GENERIC;
345 /* according to `the specs', we can't send a salt if
346 we have AFS3 salted key, but that requires that you
347 *know* what cell you are using (e.g by assuming
348 that the cell is the same as the realm in lower
351 ALLOC(ent->salttype);
352 *ent->salttype = key->salt->type;
355 * We shouldn't sent salttype since its incompatible with the
356 * specification and its break windows clients. The afs
357 * salting problem is solved by using KRB5-PADATA-AFS3-SALT
358 * implemented in Heimdal 0.7 and later.
360 ent->salttype = NULL;
362 krb5_copy_data(context, &key->salt->salt,
365 /* we return no salt type at all, as that should indicate
366 * the default salt type and make everybody happy. some
367 * systems (like w2k) dislike being told the salt type
370 ent->salttype = NULL;
376 static krb5_error_code
377 get_pa_etype_info(krb5_context context,
378 krb5_kdc_configuration *config,
379 METHOD_DATA *md, hdb_entry *client,
380 ENCTYPE *etypes, unsigned int etypes_len)
382 krb5_error_code ret = 0;
390 pa.len = client->keys.len;
391 if(pa.len > UINT_MAX/sizeof(*pa.val))
393 pa.val = malloc(pa.len * sizeof(*pa.val));
396 memset(pa.val, 0, pa.len * sizeof(*pa.val));
398 for(j = 0; j < etypes_len; j++) {
399 for (i = 0; i < n; i++)
400 if (pa.val[i].etype == etypes[j])
402 for(i = 0; i < client->keys.len; i++) {
403 if(client->keys.val[i].key.keytype == etypes[j]) {
404 if (krb5_enctype_valid(context, etypes[j]) != 0)
406 if((ret = make_etype_info_entry(context,
408 &client->keys.val[i])) != 0) {
409 free_ETYPE_INFO(&pa);
416 for(i = 0; i < client->keys.len; i++) {
417 for(j = 0; j < etypes_len; j++) {
418 if(client->keys.val[i].key.keytype == etypes[j])
421 if (krb5_enctype_valid(context, client->keys.val[i].key.keytype) != 0)
423 if((ret = make_etype_info_entry(context,
425 &client->keys.val[i])) != 0) {
426 free_ETYPE_INFO(&pa);
434 ret = krb5_unparse_name(context, client->principal, &name);
436 name = rk_UNCONST("<unparse_name failed>");
437 kdc_log(context, config, 0,
438 "internal error in get_pa_etype_info(%s): %d != %d",
445 ASN1_MALLOC_ENCODE(ETYPE_INFO, buf, len, &pa, &len, ret);
446 free_ETYPE_INFO(&pa);
449 ret = realloc_method_data(md);
454 md->val[md->len - 1].padata_type = KRB5_PADATA_ETYPE_INFO;
455 md->val[md->len - 1].padata_value.length = len;
456 md->val[md->len - 1].padata_value.data = buf;
464 extern int _krb5_AES_string_to_default_iterator;
466 static krb5_error_code
467 make_etype_info2_entry(ETYPE_INFO2_ENTRY *ent, Key *key)
469 ent->etype = key->key.keytype;
472 if (ent->salt == NULL)
474 *ent->salt = malloc(key->salt->salt.length + 1);
475 if (*ent->salt == NULL) {
480 memcpy(*ent->salt, key->salt->salt.data, key->salt->salt.length);
481 (*ent->salt)[key->salt->salt.length] = '\0';
485 ent->s2kparams = NULL;
487 switch (key->key.keytype) {
488 case ETYPE_AES128_CTS_HMAC_SHA1_96:
489 case ETYPE_AES256_CTS_HMAC_SHA1_96:
490 ALLOC(ent->s2kparams);
491 if (ent->s2kparams == NULL)
493 ent->s2kparams->length = 4;
494 ent->s2kparams->data = malloc(ent->s2kparams->length);
495 if (ent->s2kparams->data == NULL) {
496 free(ent->s2kparams);
497 ent->s2kparams = NULL;
500 _krb5_put_int(ent->s2kparams->data,
501 _krb5_AES_string_to_default_iterator,
502 ent->s2kparams->length);
504 case ETYPE_DES_CBC_CRC:
505 case ETYPE_DES_CBC_MD4:
506 case ETYPE_DES_CBC_MD5:
507 /* Check if this was a AFS3 salted key */
508 if(key->salt && key->salt->type == hdb_afs3_salt){
509 ALLOC(ent->s2kparams);
510 if (ent->s2kparams == NULL)
512 ent->s2kparams->length = 1;
513 ent->s2kparams->data = malloc(ent->s2kparams->length);
514 if (ent->s2kparams->data == NULL) {
515 free(ent->s2kparams);
516 ent->s2kparams = NULL;
519 _krb5_put_int(ent->s2kparams->data,
521 ent->s2kparams->length);
531 * Return 1 if the client have only older enctypes, this is for
532 * determining if the server should send ETYPE_INFO2 or not.
536 only_older_enctype_p(const KDC_REQ *req)
540 for(i = 0; i < req->req_body.etype.len; i++) {
541 switch (req->req_body.etype.val[i]) {
542 case ETYPE_DES_CBC_CRC:
543 case ETYPE_DES_CBC_MD4:
544 case ETYPE_DES_CBC_MD5:
545 case ETYPE_DES3_CBC_SHA1:
546 case ETYPE_ARCFOUR_HMAC_MD5:
547 case ETYPE_ARCFOUR_HMAC_MD5_56:
560 static krb5_error_code
561 get_pa_etype_info2(krb5_context context,
562 krb5_kdc_configuration *config,
563 METHOD_DATA *md, hdb_entry *client,
564 ENCTYPE *etypes, unsigned int etypes_len)
566 krb5_error_code ret = 0;
573 pa.len = client->keys.len;
574 if(pa.len > UINT_MAX/sizeof(*pa.val))
576 pa.val = malloc(pa.len * sizeof(*pa.val));
579 memset(pa.val, 0, pa.len * sizeof(*pa.val));
581 for(j = 0; j < etypes_len; j++) {
582 for (i = 0; i < n; i++)
583 if (pa.val[i].etype == etypes[j])
585 for(i = 0; i < client->keys.len; i++) {
586 if(client->keys.val[i].key.keytype == etypes[j]) {
587 if (krb5_enctype_valid(context, etypes[j]) != 0)
589 if((ret = make_etype_info2_entry(&pa.val[n++],
590 &client->keys.val[i])) != 0) {
591 free_ETYPE_INFO2(&pa);
598 for(i = 0; i < client->keys.len; i++) {
599 for(j = 0; j < etypes_len; j++) {
600 if(client->keys.val[i].key.keytype == etypes[j])
603 if (krb5_enctype_valid(context, client->keys.val[i].key.keytype) != 0)
605 if((ret = make_etype_info2_entry(&pa.val[n++],
606 &client->keys.val[i])) != 0) {
607 free_ETYPE_INFO2(&pa);
615 ret = krb5_unparse_name(context, client->principal, &name);
617 name = rk_UNCONST("<unparse_name failed>");
618 kdc_log(context, config, 0,
619 "internal error in get_pa_etype_info2(%s): %d != %d",
626 ASN1_MALLOC_ENCODE(ETYPE_INFO2, buf, len, &pa, &len, ret);
627 free_ETYPE_INFO2(&pa);
630 ret = realloc_method_data(md);
635 md->val[md->len - 1].padata_type = KRB5_PADATA_ETYPE_INFO2;
636 md->val[md->len - 1].padata_value.length = len;
637 md->val[md->len - 1].padata_value.data = buf;
646 log_as_req(krb5_context context,
647 krb5_kdc_configuration *config,
650 const KDC_REQ_BODY *b)
653 struct rk_strpool *p = NULL;
657 for (i = 0; i < b->etype.len; i++) {
658 ret = krb5_enctype_to_string(context, b->etype.val[i], &str);
660 p = rk_strpoolprintf(p, "%s", str);
663 p = rk_strpoolprintf(p, "%d", b->etype.val[i]);
664 if (p && i + 1 < b->etype.len)
665 p = rk_strpoolprintf(p, ", ");
667 kdc_log(context, config, 0, "out of memory");
672 p = rk_strpoolprintf(p, "no encryption types");
674 str = rk_strpoolcollect(p);
675 kdc_log(context, config, 0, "Client supported enctypes: %s", str);
682 ret = krb5_enctype_to_string(context, cetype, &cet);
684 ret = krb5_enctype_to_string(context, setype, &set);
686 kdc_log(context, config, 5, "Using %s/%s", cet, set);
692 kdc_log(context, config, 5, "Using e-types %d/%d", cetype, setype);
697 unparse_flags(KDCOptions2int(b->kdc_options), asn1_KDCOptions_units(),
698 fixedstr, sizeof(fixedstr));
700 kdc_log(context, config, 2, "Requested flags: %s", fixedstr);
705 * verify the flags on `client' and `server', returning 0
706 * if they are OK and generating an error messages and returning
707 * and error code otherwise.
711 _kdc_check_flags(krb5_context context,
712 krb5_kdc_configuration *config,
713 hdb_entry_ex *client_ex, const char *client_name,
714 hdb_entry_ex *server_ex, const char *server_name,
715 krb5_boolean is_as_req)
717 if(client_ex != NULL) {
718 hdb_entry *client = &client_ex->entry;
721 if (client->flags.invalid) {
722 kdc_log(context, config, 0,
723 "Client (%s) has invalid bit set", client_name);
724 return KRB5KDC_ERR_POLICY;
727 if(!client->flags.client){
728 kdc_log(context, config, 0,
729 "Principal may not act as client -- %s", client_name);
730 return KRB5KDC_ERR_POLICY;
733 if (client->valid_start && *client->valid_start > kdc_time) {
734 char starttime_str[100];
735 krb5_format_time(context, *client->valid_start,
736 starttime_str, sizeof(starttime_str), TRUE);
737 kdc_log(context, config, 0,
738 "Client not yet valid until %s -- %s",
739 starttime_str, client_name);
740 return KRB5KDC_ERR_CLIENT_NOTYET;
743 if (client->valid_end && *client->valid_end < kdc_time) {
744 char endtime_str[100];
745 krb5_format_time(context, *client->valid_end,
746 endtime_str, sizeof(endtime_str), TRUE);
747 kdc_log(context, config, 0,
748 "Client expired at %s -- %s",
749 endtime_str, client_name);
750 return KRB5KDC_ERR_NAME_EXP;
753 if (client->pw_end && *client->pw_end < kdc_time
754 && (server_ex == NULL || !server_ex->entry.flags.change_pw)) {
756 krb5_format_time(context, *client->pw_end,
757 pwend_str, sizeof(pwend_str), TRUE);
758 kdc_log(context, config, 0,
759 "Client's key has expired at %s -- %s",
760 pwend_str, client_name);
761 return KRB5KDC_ERR_KEY_EXPIRED;
767 if (server_ex != NULL) {
768 hdb_entry *server = &server_ex->entry;
770 if (server->flags.invalid) {
771 kdc_log(context, config, 0,
772 "Server has invalid flag set -- %s", server_name);
773 return KRB5KDC_ERR_POLICY;
776 if(!server->flags.server){
777 kdc_log(context, config, 0,
778 "Principal may not act as server -- %s", server_name);
779 return KRB5KDC_ERR_POLICY;
782 if(!is_as_req && server->flags.initial) {
783 kdc_log(context, config, 0,
784 "AS-REQ is required for server -- %s", server_name);
785 return KRB5KDC_ERR_POLICY;
788 if (server->valid_start && *server->valid_start > kdc_time) {
789 char starttime_str[100];
790 krb5_format_time(context, *server->valid_start,
791 starttime_str, sizeof(starttime_str), TRUE);
792 kdc_log(context, config, 0,
793 "Server not yet valid until %s -- %s",
794 starttime_str, server_name);
795 return KRB5KDC_ERR_SERVICE_NOTYET;
798 if (server->valid_end && *server->valid_end < kdc_time) {
799 char endtime_str[100];
800 krb5_format_time(context, *server->valid_end,
801 endtime_str, sizeof(endtime_str), TRUE);
802 kdc_log(context, config, 0,
803 "Server expired at %s -- %s",
804 endtime_str, server_name);
805 return KRB5KDC_ERR_SERVICE_EXP;
808 if (server->pw_end && *server->pw_end < kdc_time) {
810 krb5_format_time(context, *server->pw_end,
811 pwend_str, sizeof(pwend_str), TRUE);
812 kdc_log(context, config, 0,
813 "Server's key has expired at -- %s",
814 pwend_str, server_name);
815 return KRB5KDC_ERR_KEY_EXPIRED;
822 * Return TRUE if `from' is part of `addresses' taking into consideration
823 * the configuration variables that tells us how strict we should be about
828 _kdc_check_addresses(krb5_context context,
829 krb5_kdc_configuration *config,
830 HostAddresses *addresses, const struct sockaddr *from)
835 krb5_boolean only_netbios = TRUE;
838 if(config->check_ticket_addresses == 0)
841 if(addresses == NULL)
842 return config->allow_null_ticket_addresses;
844 for (i = 0; i < addresses->len; ++i) {
845 if (addresses->val[i].addr_type != KRB5_ADDRESS_NETBIOS) {
846 only_netbios = FALSE;
850 /* Windows sends it's netbios name, which I can only assume is
851 * used for the 'allowed workstations' check. This is painful,
852 * but we still want to check IP addresses if they happen to be
857 return config->allow_null_ticket_addresses;
859 ret = krb5_sockaddr2address (context, from, &addr);
863 result = krb5_address_search(context, &addr, addresses);
864 krb5_free_address (context, &addr);
873 send_pac_p(krb5_context context, KDC_REQ *req)
876 PA_PAC_REQUEST pacreq;
880 pa = _kdc_find_padata(req, &i, KRB5_PADATA_PA_PAC_REQUEST);
884 ret = decode_PA_PAC_REQUEST(pa->padata_value.data,
885 pa->padata_value.length,
890 i = pacreq.include_pac;
891 free_PA_PAC_REQUEST(&pacreq);
902 _kdc_as_rep(krb5_context context,
903 krb5_kdc_configuration *config,
905 const krb5_data *req_buffer,
908 struct sockaddr *from_addr,
911 KDC_REQ_BODY *b = &req->req_body;
913 KDCOptions f = b->kdc_options;
914 hdb_entry_ex *client = NULL, *server = NULL;
915 krb5_enctype cetype, setype, sessionetype;
919 krb5_principal client_princ = NULL, server_princ = NULL;
920 char *client_name = NULL, *server_name = NULL;
921 krb5_error_code ret = 0;
922 const char *e_text = NULL;
925 EncryptionKey *reply_key;
928 pk_client_params *pkp = NULL;
931 memset(&rep, 0, sizeof(rep));
932 krb5_data_zero(&e_data);
935 flags |= HDB_F_CANON;
937 if(b->sname == NULL){
938 ret = KRB5KRB_ERR_GENERIC;
939 e_text = "No server in request";
941 ret = _krb5_principalname2krb5_principal (context,
946 ret = krb5_unparse_name(context, server_princ, &server_name);
949 kdc_log(context, config, 0,
950 "AS-REQ malformed server name from %s", from);
954 if(b->cname == NULL){
955 ret = KRB5KRB_ERR_GENERIC;
956 e_text = "No client in request";
959 if (b->cname->name_type == KRB5_NT_ENTERPRISE_PRINCIPAL) {
960 if (b->cname->name_string.len != 1) {
961 kdc_log(context, config, 0,
962 "AS-REQ malformed canon request from %s", from);
963 ret = KRB5_PARSE_MALFORMED;
966 ret = krb5_parse_name(context, b->cname->name_string.val[0],
971 ret = _krb5_principalname2krb5_principal (context,
978 ret = krb5_unparse_name(context, client_princ, &client_name);
981 kdc_log(context, config, 0,
982 "AS-REQ malformed client name from %s", from);
986 kdc_log(context, config, 0, "AS-REQ %s from %s for %s",
987 client_name, from, server_name);
989 ret = _kdc_db_fetch(context, config, client_princ,
990 HDB_F_GET_CLIENT | flags, NULL, &client);
992 kdc_log(context, config, 0, "UNKNOWN -- %s: %s", client_name,
993 krb5_get_err_text(context, ret));
994 ret = KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN;
998 ret = _kdc_db_fetch(context, config, server_princ,
999 HDB_F_GET_SERVER|HDB_F_GET_KRBTGT,
1002 kdc_log(context, config, 0, "UNKNOWN -- %s: %s", server_name,
1003 krb5_get_err_text(context, ret));
1004 ret = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
1008 ret = _kdc_windc_client_access(context, client, req);
1012 ret = _kdc_check_flags(context, config,
1013 client, client_name,
1014 server, server_name,
1019 memset(&et, 0, sizeof(et));
1020 memset(&ek, 0, sizeof(ek));
1027 log_patypes(context, config, req->padata);
1030 kdc_log(context, config, 5,
1031 "Looking for PKINIT pa-data -- %s", client_name);
1033 e_text = "No PKINIT PA found";
1036 if ((pa = _kdc_find_padata(req, &i, KRB5_PADATA_PK_AS_REQ)))
1040 if((pa = _kdc_find_padata(req, &i, KRB5_PADATA_PK_AS_REQ_WIN)))
1044 char *client_cert = NULL;
1046 ret = _kdc_pk_rd_padata(context, config, req, pa, &pkp);
1048 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1049 kdc_log(context, config, 5,
1050 "Failed to decode PKINIT PA-DATA -- %s",
1054 if (ret == 0 && pkp == NULL)
1057 ret = _kdc_pk_check_client(context,
1063 e_text = "PKINIT certificate not allowed to "
1064 "impersonate principal";
1065 _kdc_pk_free_client_param(context, pkp);
1067 kdc_log(context, config, 0, "%s", e_text);
1072 et.flags.pre_authent = 1;
1073 kdc_log(context, config, 0,
1074 "PKINIT pre-authentication succeeded -- %s using %s",
1075 client_name, client_cert);
1082 kdc_log(context, config, 5, "Looking for ENC-TS pa-data -- %s",
1086 e_text = "No ENC-TS found";
1087 while((pa = _kdc_find_padata(req, &i, KRB5_PADATA_ENC_TIMESTAMP))){
1091 EncryptedData enc_data;
1097 ret = decode_EncryptedData(pa->padata_value.data,
1098 pa->padata_value.length,
1102 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1103 kdc_log(context, config, 5, "Failed to decode PA-DATA -- %s",
1108 ret = hdb_enctype2key(context, &client->entry,
1109 enc_data.etype, &pa_key);
1112 e_text = "No key matches pa-data";
1113 ret = KRB5KDC_ERR_ETYPE_NOSUPP;
1114 if(krb5_enctype_to_string(context, enc_data.etype, &estr))
1117 kdc_log(context, config, 5,
1118 "No client key matching pa-data (%d) -- %s",
1119 enc_data.etype, client_name);
1121 kdc_log(context, config, 5,
1122 "No client key matching pa-data (%s) -- %s",
1126 free_EncryptedData(&enc_data);
1131 ret = krb5_crypto_init(context, &pa_key->key, 0, &crypto);
1133 kdc_log(context, config, 0, "krb5_crypto_init failed: %s",
1134 krb5_get_err_text(context, ret));
1135 free_EncryptedData(&enc_data);
1139 ret = krb5_decrypt_EncryptedData (context,
1141 KRB5_KU_PA_ENC_TIMESTAMP,
1144 krb5_crypto_destroy(context, crypto);
1146 krb5_error_code ret2;
1147 ret2 = krb5_enctype_to_string(context,
1148 pa_key->key.keytype, &str);
1151 kdc_log(context, config, 5,
1152 "Failed to decrypt PA-DATA -- %s "
1153 "(enctype %s) error %s",
1155 str ? str : "unknown enctype",
1156 krb5_get_err_text(context, ret));
1159 if(hdb_next_enctype2key(context, &client->entry,
1160 enc_data.etype, &pa_key) == 0)
1162 e_text = "Failed to decrypt PA-DATA";
1164 free_EncryptedData(&enc_data);
1165 ret = KRB5KDC_ERR_PREAUTH_FAILED;
1168 free_EncryptedData(&enc_data);
1169 ret = decode_PA_ENC_TS_ENC(ts_data.data,
1173 krb5_data_free(&ts_data);
1175 e_text = "Failed to decode PA-ENC-TS-ENC";
1176 ret = KRB5KDC_ERR_PREAUTH_FAILED;
1177 kdc_log(context, config,
1178 5, "Failed to decode PA-ENC-TS_ENC -- %s",
1182 free_PA_ENC_TS_ENC(&p);
1183 if (abs(kdc_time - p.patimestamp) > context->max_skew) {
1184 char client_time[100];
1186 krb5_format_time(context, p.patimestamp,
1187 client_time, sizeof(client_time), TRUE);
1189 ret = KRB5KRB_AP_ERR_SKEW;
1190 kdc_log(context, config, 0,
1191 "Too large time skew, "
1192 "client time %s is out by %u > %u seconds -- %s",
1194 (unsigned)abs(kdc_time - p.patimestamp),
1198 /* This code is from samba, needs testing */
1200 * the following is needed to make windows clients
1201 * to retry using the timestamp in the error message
1203 * this is maybe a bug in windows to not trying when e_text
1208 e_text = "Too large time skew";
1212 et.flags.pre_authent = 1;
1214 ret = krb5_enctype_to_string(context,pa_key->key.keytype, &str);
1218 kdc_log(context, config, 2,
1219 "ENC-TS Pre-authentication succeeded -- %s using %s",
1220 client_name, str ? str : "unknown enctype");
1227 if(found_pa == 0 && config->require_preauth)
1229 /* We come here if we found a pa-enc-timestamp, but if there
1230 was some problem with it, other than too large skew */
1231 if(found_pa && et.flags.pre_authent == 0){
1232 kdc_log(context, config, 0, "%s -- %s", e_text, client_name);
1236 }else if (config->require_preauth
1237 || client->entry.flags.require_preauth
1238 || server->entry.flags.require_preauth) {
1239 METHOD_DATA method_data;
1245 method_data.len = 0;
1246 method_data.val = NULL;
1248 ret = realloc_method_data(&method_data);
1249 pa = &method_data.val[method_data.len-1];
1250 pa->padata_type = KRB5_PADATA_ENC_TIMESTAMP;
1251 pa->padata_value.length = 0;
1252 pa->padata_value.data = NULL;
1255 ret = realloc_method_data(&method_data);
1256 pa = &method_data.val[method_data.len-1];
1257 pa->padata_type = KRB5_PADATA_PK_AS_REQ;
1258 pa->padata_value.length = 0;
1259 pa->padata_value.data = NULL;
1261 ret = realloc_method_data(&method_data);
1262 pa = &method_data.val[method_data.len-1];
1263 pa->padata_type = KRB5_PADATA_PK_AS_REQ_WIN;
1264 pa->padata_value.length = 0;
1265 pa->padata_value.data = NULL;
1270 * - If the client only knows about old enctypes, then send
1271 * both info replies (we send 'info' first in the list).
1272 * - If the client is 'modern', because it knows about 'new'
1273 * enctype types, then only send the 'info2' reply.
1277 if (only_older_enctype_p(req))
1278 ret = get_pa_etype_info(context, config,
1279 &method_data, &client->entry,
1280 b->etype.val, b->etype.len);
1282 ret = get_pa_etype_info2(context, config, &method_data,
1283 &client->entry, b->etype.val, b->etype.len);
1286 ASN1_MALLOC_ENCODE(METHOD_DATA, buf, len, &method_data, &len, ret);
1287 free_METHOD_DATA(&method_data);
1290 e_data.length = len;
1291 e_text ="Need to use PA-ENC-TIMESTAMP/PA-PK-AS-REQ",
1293 ret = KRB5KDC_ERR_PREAUTH_REQUIRED;
1295 kdc_log(context, config, 0,
1296 "No preauth found, returning PREAUTH-REQUIRED -- %s",
1302 * Find the client key (for preauth ENC-TS verification and reply
1303 * encryption). Then the best encryption type for the KDC and
1304 * last the best session key that shared between the client and
1305 * KDC runtime enctypes.
1308 ret = _kdc_find_etype(context, client, b->etype.val, b->etype.len,
1311 kdc_log(context, config, 0,
1312 "Client (%s) has no support for etypes", client_name);
1316 ret = _kdc_get_preferred_key(context, config,
1317 server, server_name,
1323 * Select a session enctype from the list of the crypto systems
1324 * supported enctype, is supported by the client and is one of the
1325 * enctype of the enctype of the krbtgt.
1327 * The later is used as a hint what enctype all KDC are supporting
1328 * to make sure a newer version of KDC wont generate a session
1329 * enctype that and older version of a KDC in the same realm can't
1332 * But if the KDC admin is paranoid and doesn't want to have "no
1333 * the best" enctypes on the krbtgt, lets save the best pick from
1334 * the client list and hope that that will work for any other
1338 const krb5_enctype *p;
1339 krb5_enctype clientbest = ETYPE_NULL;
1342 p = krb5_kerberos_enctypes(context);
1344 sessionetype = ETYPE_NULL;
1346 for (i = 0; p[i] != ETYPE_NULL && sessionetype == ETYPE_NULL; i++) {
1347 if (krb5_enctype_valid(context, p[i]) != 0)
1350 for (j = 0; j < b->etype.len && sessionetype == ETYPE_NULL; j++) {
1352 /* check with client */
1353 if (p[i] != b->etype.val[j])
1355 /* save best of union of { client, crypto system } */
1356 if (clientbest == ETYPE_NULL)
1358 /* check with krbtgt */
1359 ret = hdb_enctype2key(context, &server->entry, p[i], &dummy);
1362 sessionetype = p[i];
1365 /* if krbtgt had no shared keys with client, pick clients best */
1366 if (clientbest != ETYPE_NULL && sessionetype == ETYPE_NULL) {
1367 sessionetype = clientbest;
1368 } else if (sessionetype == ETYPE_NULL) {
1369 kdc_log(context, config, 0,
1370 "Client (%s) from %s has no common enctypes with KDC"
1371 "to use for the session key",
1377 log_as_req(context, config, cetype, setype, b);
1379 if(f.renew || f.validate || f.proxy || f.forwarded || f.enc_tkt_in_skey
1380 || (f.request_anonymous && !config->allow_anonymous)) {
1381 ret = KRB5KDC_ERR_BADOPTION;
1382 kdc_log(context, config, 0, "Bad KDC options -- %s", client_name);
1387 rep.msg_type = krb_as_rep;
1388 copy_Realm(&client->entry.principal->realm, &rep.crealm);
1389 if (f.request_anonymous)
1390 _kdc_make_anonymous_principalname (&rep.cname);
1392 _krb5_principal2principalname(&rep.cname,
1393 client->entry.principal);
1394 rep.ticket.tkt_vno = 5;
1395 copy_Realm(&server->entry.principal->realm, &rep.ticket.realm);
1396 _krb5_principal2principalname(&rep.ticket.sname,
1397 server->entry.principal);
1399 et.flags.initial = 1;
1400 if(client->entry.flags.forwardable && server->entry.flags.forwardable)
1401 et.flags.forwardable = f.forwardable;
1402 else if (f.forwardable) {
1403 ret = KRB5KDC_ERR_POLICY;
1404 kdc_log(context, config, 0,
1405 "Ticket may not be forwardable -- %s", client_name);
1408 if(client->entry.flags.proxiable && server->entry.flags.proxiable)
1409 et.flags.proxiable = f.proxiable;
1410 else if (f.proxiable) {
1411 ret = KRB5KDC_ERR_POLICY;
1412 kdc_log(context, config, 0,
1413 "Ticket may not be proxiable -- %s", client_name);
1416 if(client->entry.flags.postdate && server->entry.flags.postdate)
1417 et.flags.may_postdate = f.allow_postdate;
1418 else if (f.allow_postdate){
1419 ret = KRB5KDC_ERR_POLICY;
1420 kdc_log(context, config, 0,
1421 "Ticket may not be postdatable -- %s", client_name);
1425 /* check for valid set of addresses */
1426 if(!_kdc_check_addresses(context, config, b->addresses, from_addr)) {
1427 ret = KRB5KRB_AP_ERR_BADADDR;
1428 kdc_log(context, config, 0,
1429 "Bad address list requested -- %s", client_name);
1433 ret = krb5_generate_random_keyblock(context, sessionetype, &et.key);
1436 copy_PrincipalName(&rep.cname, &et.cname);
1437 copy_Realm(&rep.crealm, &et.crealm);
1443 start = et.authtime = kdc_time;
1445 if(f.postdated && req->req_body.from){
1446 ALLOC(et.starttime);
1447 start = *et.starttime = *req->req_body.from;
1448 et.flags.invalid = 1;
1449 et.flags.postdated = 1; /* XXX ??? */
1451 _kdc_fix_time(&b->till);
1454 /* be careful not overflowing */
1456 if(client->entry.max_life)
1457 t = start + min(t - start, *client->entry.max_life);
1458 if(server->entry.max_life)
1459 t = start + min(t - start, *server->entry.max_life);
1461 t = min(t, start + realm->max_life);
1464 if(f.renewable_ok && et.endtime < *b->till){
1466 if(b->rtime == NULL){
1470 if(*b->rtime < *b->till)
1471 *b->rtime = *b->till;
1473 if(f.renewable && b->rtime){
1477 if(client->entry.max_renew)
1478 t = start + min(t - start, *client->entry.max_renew);
1479 if(server->entry.max_renew)
1480 t = start + min(t - start, *server->entry.max_renew);
1482 t = min(t, start + realm->max_renew);
1484 ALLOC(et.renew_till);
1486 et.flags.renewable = 1;
1490 if (f.request_anonymous)
1491 et.flags.anonymous = 1;
1495 copy_HostAddresses(b->addresses, et.caddr);
1498 et.transited.tr_type = DOMAIN_X500_COMPRESS;
1499 krb5_data_zero(&et.transited.contents);
1501 copy_EncryptionKey(&et.key, &ek.key);
1503 /* The MIT ASN.1 library (obviously) doesn't tell lengths encoded
1504 * as 0 and as 0x80 (meaning indefinite length) apart, and is thus
1505 * incapable of correctly decoding SEQUENCE OF's of zero length.
1507 * To fix this, always send at least one no-op last_req
1509 * If there's a pw_end or valid_end we will use that,
1510 * otherwise just a dummy lr.
1512 ek.last_req.val = malloc(2 * sizeof(*ek.last_req.val));
1513 ek.last_req.len = 0;
1514 if (client->entry.pw_end
1515 && (config->kdc_warn_pwexpire == 0
1516 || kdc_time + config->kdc_warn_pwexpire >= *client->entry.pw_end)) {
1517 ek.last_req.val[ek.last_req.len].lr_type = LR_PW_EXPTIME;
1518 ek.last_req.val[ek.last_req.len].lr_value = *client->entry.pw_end;
1521 if (client->entry.valid_end) {
1522 ek.last_req.val[ek.last_req.len].lr_type = LR_ACCT_EXPTIME;
1523 ek.last_req.val[ek.last_req.len].lr_value = *client->entry.valid_end;
1526 if (ek.last_req.len == 0) {
1527 ek.last_req.val[ek.last_req.len].lr_type = LR_NONE;
1528 ek.last_req.val[ek.last_req.len].lr_value = 0;
1531 ek.nonce = b->nonce;
1532 if (client->entry.valid_end || client->entry.pw_end) {
1533 ALLOC(ek.key_expiration);
1534 if (client->entry.valid_end) {
1535 if (client->entry.pw_end)
1536 *ek.key_expiration = min(*client->entry.valid_end,
1537 *client->entry.pw_end);
1539 *ek.key_expiration = *client->entry.valid_end;
1541 *ek.key_expiration = *client->entry.pw_end;
1543 ek.key_expiration = NULL;
1544 ek.flags = et.flags;
1545 ek.authtime = et.authtime;
1547 ALLOC(ek.starttime);
1548 *ek.starttime = *et.starttime;
1550 ek.endtime = et.endtime;
1551 if (et.renew_till) {
1552 ALLOC(ek.renew_till);
1553 *ek.renew_till = *et.renew_till;
1555 copy_Realm(&rep.ticket.realm, &ek.srealm);
1556 copy_PrincipalName(&rep.ticket.sname, &ek.sname);
1559 copy_HostAddresses(et.caddr, ek.caddr);
1563 rep.padata->len = 0;
1564 rep.padata->val = NULL;
1566 reply_key = &ckey->key;
1569 ret = _kdc_pk_mk_pa_reply(context, config, pkp, client,
1571 &reply_key, rep.padata);
1574 ret = _kdc_add_inital_verified_cas(context,
1583 set_salt_padata (rep.padata, ckey->salt);
1585 /* Add signing of alias referral */
1586 if (f.canonicalize) {
1587 PA_ClientCanonicalized canon;
1593 memset(&canon, 0, sizeof(canon));
1595 canon.names.requested_name = *b->cname;
1596 canon.names.real_name = client->entry.principal->name;
1598 ASN1_MALLOC_ENCODE(PA_ClientCanonicalizedNames, data.data, data.length,
1599 &canon.names, &len, ret);
1602 if (data.length != len)
1603 krb5_abortx(context, "internal asn.1 error");
1605 /* sign using "returned session key" */
1606 ret = krb5_crypto_init(context, &et.key, 0, &crypto);
1612 ret = krb5_create_checksum(context, crypto,
1613 KRB5_KU_CANONICALIZED_NAMES, 0,
1614 data.data, data.length,
1615 &canon.canon_checksum);
1617 krb5_crypto_destroy(context, crypto);
1621 ASN1_MALLOC_ENCODE(PA_ClientCanonicalized, data.data, data.length,
1623 free_Checksum(&canon.canon_checksum);
1626 if (data.length != len)
1627 krb5_abortx(context, "internal asn.1 error");
1629 pa.padata_type = KRB5_PADATA_CLIENT_CANONICALIZED;
1630 pa.padata_value = data;
1631 ret = add_METHOD_DATA(rep.padata, &pa);
1637 if (rep.padata->len == 0) {
1643 if (send_pac_p(context, req)) {
1647 ret = _kdc_pac_generate(context, client, &p);
1649 kdc_log(context, config, 0, "PAC generation failed for -- %s",
1654 ret = _krb5_pac_sign(context, p, et.authtime,
1655 client->entry.principal,
1656 &skey->key, /* Server key */
1657 &skey->key, /* FIXME: should be krbtgt key */
1659 krb5_pac_free(context, p);
1661 kdc_log(context, config, 0, "PAC signing failed for -- %s",
1666 ret = _kdc_tkt_add_if_relevant_ad(context, &et,
1667 KRB5_AUTHDATA_WIN2K_PAC,
1669 krb5_data_free(&data);
1675 _kdc_log_timestamp(context, config, "AS-REQ", et.authtime, et.starttime,
1676 et.endtime, et.renew_till);
1678 /* do this as the last thing since this signs the EncTicketPart */
1679 ret = _kdc_add_KRB5SignedPath(context,
1689 ret = _kdc_encode_reply(context, config,
1690 &rep, &et, &ek, setype, server->entry.kvno,
1691 &skey->key, client->entry.kvno,
1692 reply_key, &e_text, reply);
1693 free_EncTicketPart(&et);
1694 free_EncKDCRepPart(&ek);
1699 if (datagram_reply && reply->length > config->max_datagram_reply_length) {
1700 krb5_data_free(reply);
1701 ret = KRB5KRB_ERR_RESPONSE_TOO_BIG;
1702 e_text = "Reply packet too large";
1708 krb5_mk_error(context,
1711 (e_data.data ? &e_data : NULL),
1721 _kdc_pk_free_client_param(context, pkp);
1726 krb5_free_principal(context, client_princ);
1729 krb5_free_principal(context, server_princ);
1732 _kdc_free_ent(context, client);
1734 _kdc_free_ent(context, server);
1739 * Add the AuthorizationData `data´ of `type´ to the last element in
1740 * the sequence of authorization_data in `tkt´ wrapped in an IF_RELEVANT
1744 _kdc_tkt_add_if_relevant_ad(krb5_context context,
1747 const krb5_data *data)
1749 krb5_error_code ret;
1752 if (tkt->authorization_data == NULL) {
1753 tkt->authorization_data = calloc(1, sizeof(*tkt->authorization_data));
1754 if (tkt->authorization_data == NULL) {
1755 krb5_set_error_string(context, "out of memory");
1760 /* add the entry to the last element */
1762 AuthorizationData ad = { 0, NULL };
1763 AuthorizationDataElement ade;
1766 ade.ad_data = *data;
1768 ret = add_AuthorizationData(&ad, &ade);
1770 krb5_set_error_string(context, "add AuthorizationData failed");
1774 ade.ad_type = KRB5_AUTHDATA_IF_RELEVANT;
1776 ASN1_MALLOC_ENCODE(AuthorizationData,
1777 ade.ad_data.data, ade.ad_data.length,
1779 free_AuthorizationData(&ad);
1781 krb5_set_error_string(context, "ASN.1 encode of "
1782 "AuthorizationData failed");
1785 if (ade.ad_data.length != size)
1786 krb5_abortx(context, "internal asn.1 encoder error");
1788 ret = add_AuthorizationData(tkt->authorization_data, &ade);
1789 der_free_octet_string(&ade.ad_data);
1791 krb5_set_error_string(context, "add AuthorizationData failed");