2 * Copyright (c) 1997-2006 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,v 1.231 2007/01/04 13:27:27 lha Exp $");
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(KDC_REQ *req, int *start, int type)
76 while(*start < req->padata->len){
78 if(req->padata->val[*start - 1].padata_type == type)
79 return &req->padata->val[*start - 1];
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
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)
96 krb5_error_code ret = KRB5KDC_ERR_ETYPE_NOSUPP;
98 for(i = 0; ret != 0 && i < len ; i++) {
101 if (krb5_enctype_valid(context, etypes[i]) != 0)
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;
110 *ret_etype = etypes[i];
112 if (key->salt == NULL)
120 _kdc_make_anonymous_principalname (PrincipalName *pn)
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)
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;
137 _kdc_log_timestamp(krb5_context context,
138 krb5_kdc_configuration *config,
140 KerberosTime authtime, KerberosTime *starttime,
141 KerberosTime endtime, KerberosTime *renew_till)
143 char authtime_str[100], starttime_str[100],
144 endtime_str[100], renewtime_str[100];
146 krb5_format_time(context, authtime,
147 authtime_str, sizeof(authtime_str), TRUE);
149 krb5_format_time(context, *starttime,
150 starttime_str, sizeof(starttime_str), TRUE);
152 strlcpy(starttime_str, "unset", sizeof(starttime_str));
153 krb5_format_time(context, endtime,
154 endtime_str, sizeof(endtime_str), TRUE);
156 krb5_format_time(context, *renew_till,
157 renewtime_str, sizeof(renewtime_str), TRUE);
159 strlcpy(renewtime_str, "unset", sizeof(renewtime_str));
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);
167 log_patypes(krb5_context context,
168 krb5_kdc_configuration *config,
171 struct rk_strpool *p = NULL;
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)");
180 case KRB5_PADATA_PK_AS_REQ_WIN:
181 p = rk_strpoolprintf(p, "PK-INIT(win2k)");
183 case KRB5_PADATA_PA_PK_OCSP_RESPONSE:
184 p = rk_strpoolprintf(p, "OCSP");
186 case KRB5_PADATA_ENC_TIMESTAMP:
187 p = rk_strpoolprintf(p, "encrypted-timestamp");
190 p = rk_strpoolprintf(p, "%d", padata->val[i].padata_type);
193 if (p && i + 1 < padata->len)
194 p = rk_strpoolprintf(p, ", ");
196 kdc_log(context, config, 0, "out of memory");
201 p = rk_strpoolprintf(p, "none");
203 str = rk_strpoolcollect(p);
204 kdc_log(context, config, 0, "Client sent patypes: %s", str);
214 _kdc_encode_reply(krb5_context context,
215 krb5_kdc_configuration *config,
216 KDC_REP *rep, const EncTicketPart *et, EncKDCRepPart *ek,
218 int skvno, const EncryptionKey *skey,
219 int ckvno, const EncryptionKey *ckey,
229 ASN1_MALLOC_ENCODE(EncTicketPart, buf, buf_size, et, &len, ret);
231 kdc_log(context, config, 0, "Failed to encode ticket: %s",
232 krb5_get_err_text(context, ret));
235 if(buf_size != len) {
237 kdc_log(context, config, 0, "Internal error in ASN.1 encoder");
238 *e_text = "KDC internal error";
239 return KRB5KRB_ERR_GENERIC;
242 ret = krb5_crypto_init(context, skey, etype, &crypto);
245 kdc_log(context, config, 0, "krb5_crypto_init failed: %s",
246 krb5_get_err_text(context, ret));
250 ret = krb5_encrypt_EncryptedData(context,
256 &rep->ticket.enc_part);
258 krb5_crypto_destroy(context, crypto);
260 kdc_log(context, config, 0, "Failed to encrypt data: %s",
261 krb5_get_err_text(context, ret));
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);
268 ASN1_MALLOC_ENCODE(EncTGSRepPart, buf, buf_size, ek, &len, ret);
270 kdc_log(context, config, 0, "Failed to encode KDC-REP: %s",
271 krb5_get_err_text(context, ret));
274 if(buf_size != len) {
276 kdc_log(context, config, 0, "Internal error in ASN.1 encoder");
277 *e_text = "KDC internal error";
278 return KRB5KRB_ERR_GENERIC;
280 ret = krb5_crypto_init(context, ckey, 0, &crypto);
283 kdc_log(context, config, 0, "krb5_crypto_init failed: %s",
284 krb5_get_err_text(context, ret));
287 if(rep->msg_type == krb_as_rep) {
288 krb5_encrypt_EncryptedData(context,
290 KRB5_KU_AS_REP_ENC_PART,
296 ASN1_MALLOC_ENCODE(AS_REP, buf, buf_size, rep, &len, ret);
298 krb5_encrypt_EncryptedData(context,
300 KRB5_KU_TGS_REP_ENC_PART_SESSION,
306 ASN1_MALLOC_ENCODE(TGS_REP, buf, buf_size, rep, &len, ret);
308 krb5_crypto_destroy(context, crypto);
310 kdc_log(context, config, 0, "Failed to encode KDC-REP: %s",
311 krb5_get_err_text(context, ret));
314 if(buf_size != len) {
316 kdc_log(context, config, 0, "Internal error in ASN.1 encoder");
317 *e_text = "KDC internal error";
318 return KRB5KRB_ERR_GENERIC;
321 reply->length = buf_size;
325 static krb5_error_code
326 make_etype_info_entry(krb5_context context, ETYPE_INFO_ENTRY *ent, Key *key)
328 ent->etype = key->key.keytype;
331 ALLOC(ent->salttype);
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)
338 kdc_log(context, config, 0, "unknown salt-type: %d",
340 return KRB5KRB_ERR_GENERIC;
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
348 ALLOC(ent->salttype);
349 *ent->salttype = key->salt->type;
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.
357 ent->salttype = NULL;
359 krb5_copy_data(context, &key->salt->salt,
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
367 ent->salttype = NULL;
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)
379 krb5_error_code ret = 0;
387 pa.len = client->keys.len;
388 if(pa.len > UINT_MAX/sizeof(*pa.val))
390 pa.val = malloc(pa.len * sizeof(*pa.val));
393 memset(pa.val, 0, pa.len * sizeof(*pa.val));
395 for(j = 0; j < etypes_len; j++) {
396 for (i = 0; i < n; i++)
397 if (pa.val[i].etype == etypes[j])
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)
403 if((ret = make_etype_info_entry(context,
405 &client->keys.val[i])) != 0) {
406 free_ETYPE_INFO(&pa);
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])
418 if (krb5_enctype_valid(context, client->keys.val[i].key.keytype) != 0)
420 if((ret = make_etype_info_entry(context,
422 &client->keys.val[i])) != 0) {
423 free_ETYPE_INFO(&pa);
431 ret = krb5_unparse_name(context, client->principal, &name);
433 name = rk_UNCONST("<unparse_name failed>");
434 kdc_log(context, config, 0, "internal error in get_pa_etype_info(%s): %d != %d",
441 ASN1_MALLOC_ENCODE(ETYPE_INFO, buf, len, &pa, &len, ret);
442 free_ETYPE_INFO(&pa);
445 ret = realloc_method_data(md);
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;
460 extern int _krb5_AES_string_to_default_iterator;
462 static krb5_error_code
463 make_etype_info2_entry(ETYPE_INFO2_ENTRY *ent, Key *key)
465 ent->etype = key->key.keytype;
468 if (ent->salt == NULL)
470 *ent->salt = malloc(key->salt->salt.length + 1);
471 if (*ent->salt == NULL) {
476 memcpy(*ent->salt, key->salt->salt.data, key->salt->salt.length);
477 (*ent->salt)[key->salt->salt.length] = '\0';
481 ent->s2kparams = NULL;
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)
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;
496 _krb5_put_int(ent->s2kparams->data,
497 _krb5_AES_string_to_default_iterator,
498 ent->s2kparams->length);
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)
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;
515 _krb5_put_int(ent->s2kparams->data,
517 ent->s2kparams->length);
527 * Return 1 if the client have only older enctypes, this is for
528 * determining if the server should send ETYPE_INFO2 or not.
532 only_older_enctype_p(const KDC_REQ *req)
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:
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)
562 krb5_error_code ret = 0;
569 pa.len = client->keys.len;
570 if(pa.len > UINT_MAX/sizeof(*pa.val))
572 pa.val = malloc(pa.len * sizeof(*pa.val));
575 memset(pa.val, 0, pa.len * sizeof(*pa.val));
577 for(j = 0; j < etypes_len; j++) {
578 for (i = 0; i < n; i++)
579 if (pa.val[i].etype == etypes[j])
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)
585 if((ret = make_etype_info2_entry(&pa.val[n++],
586 &client->keys.val[i])) != 0) {
587 free_ETYPE_INFO2(&pa);
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])
599 if (krb5_enctype_valid(context, client->keys.val[i].key.keytype) != 0)
601 if((ret = make_etype_info2_entry(&pa.val[n++],
602 &client->keys.val[i])) != 0) {
603 free_ETYPE_INFO2(&pa);
611 ret = krb5_unparse_name(context, client->principal, &name);
613 name = rk_UNCONST("<unparse_name failed>");
614 kdc_log(context, config, 0,
615 "internal error in get_pa_etype_info2(%s): %d != %d",
622 ASN1_MALLOC_ENCODE(ETYPE_INFO2, buf, len, &pa, &len, ret);
623 free_ETYPE_INFO2(&pa);
626 ret = realloc_method_data(md);
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;
642 log_as_req(krb5_context context,
643 krb5_kdc_configuration *config,
646 const KDC_REQ_BODY *b)
649 struct rk_strpool *p = NULL;
653 for (i = 0; i < b->etype.len; i++) {
654 ret = krb5_enctype_to_string(context, b->etype.val[i], &str);
656 p = rk_strpoolprintf(p, "%s", str);
659 p = rk_strpoolprintf(p, "%d", b->etype.val[i]);
660 if (p && i + 1 < b->etype.len)
661 p = rk_strpoolprintf(p, ", ");
663 kdc_log(context, config, 0, "out of memory");
668 p = rk_strpoolprintf(p, "no encryption types");
670 str = rk_strpoolcollect(p);
671 kdc_log(context, config, 0, "Client supported enctypes: %s", str);
678 ret = krb5_enctype_to_string(context, cetype, &cet);
680 ret = krb5_enctype_to_string(context, setype, &set);
682 kdc_log(context, config, 5, "Using %s/%s", cet, set);
688 kdc_log(context, config, 5, "Using e-types %d/%d", cetype, setype);
693 unparse_flags(KDCOptions2int(b->kdc_options), asn1_KDCOptions_units(),
696 kdc_log(context, config, 2, "Requested flags: %s", _str);
701 * verify the flags on `client' and `server', returning 0
702 * if they are OK and generating an error messages and returning
703 * and error code otherwise.
707 _kdc_check_flags(krb5_context context,
708 krb5_kdc_configuration *config,
709 hdb_entry_ex *client_ex, const char *client_name,
710 hdb_entry_ex *server_ex, const char *server_name,
711 krb5_boolean is_as_req)
713 if(client_ex != NULL) {
714 hdb_entry *client = &client_ex->entry;
717 if (client->flags.invalid) {
718 kdc_log(context, config, 0,
719 "Client (%s) has invalid bit set", client_name);
720 return KRB5KDC_ERR_POLICY;
723 if(!client->flags.client){
724 kdc_log(context, config, 0,
725 "Principal may not act as client -- %s", client_name);
726 return KRB5KDC_ERR_POLICY;
729 if (client->valid_start && *client->valid_start > kdc_time) {
730 char starttime_str[100];
731 krb5_format_time(context, *client->valid_start,
732 starttime_str, sizeof(starttime_str), TRUE);
733 kdc_log(context, config, 0,
734 "Client not yet valid until %s -- %s",
735 starttime_str, client_name);
736 return KRB5KDC_ERR_CLIENT_NOTYET;
739 if (client->valid_end && *client->valid_end < kdc_time) {
740 char endtime_str[100];
741 krb5_format_time(context, *client->valid_end,
742 endtime_str, sizeof(endtime_str), TRUE);
743 kdc_log(context, config, 0,
744 "Client expired at %s -- %s",
745 endtime_str, client_name);
746 return KRB5KDC_ERR_NAME_EXP;
749 if (client->pw_end && *client->pw_end < kdc_time
750 && (server_ex == NULL || !server_ex->entry.flags.change_pw)) {
752 krb5_format_time(context, *client->pw_end,
753 pwend_str, sizeof(pwend_str), TRUE);
754 kdc_log(context, config, 0,
755 "Client's key has expired at %s -- %s",
756 pwend_str, client_name);
757 return KRB5KDC_ERR_KEY_EXPIRED;
763 if (server_ex != NULL) {
764 hdb_entry *server = &server_ex->entry;
766 if (server->flags.invalid) {
767 kdc_log(context, config, 0,
768 "Server has invalid flag set -- %s", server_name);
769 return KRB5KDC_ERR_POLICY;
772 if(!server->flags.server){
773 kdc_log(context, config, 0,
774 "Principal may not act as server -- %s", server_name);
775 return KRB5KDC_ERR_POLICY;
778 if(!is_as_req && server->flags.initial) {
779 kdc_log(context, config, 0,
780 "AS-REQ is required for server -- %s", server_name);
781 return KRB5KDC_ERR_POLICY;
784 if (server->valid_start && *server->valid_start > kdc_time) {
785 char starttime_str[100];
786 krb5_format_time(context, *server->valid_start,
787 starttime_str, sizeof(starttime_str), TRUE);
788 kdc_log(context, config, 0,
789 "Server not yet valid until %s -- %s",
790 starttime_str, server_name);
791 return KRB5KDC_ERR_SERVICE_NOTYET;
794 if (server->valid_end && *server->valid_end < kdc_time) {
795 char endtime_str[100];
796 krb5_format_time(context, *server->valid_end,
797 endtime_str, sizeof(endtime_str), TRUE);
798 kdc_log(context, config, 0,
799 "Server expired at %s -- %s",
800 endtime_str, server_name);
801 return KRB5KDC_ERR_SERVICE_EXP;
804 if (server->pw_end && *server->pw_end < kdc_time) {
806 krb5_format_time(context, *server->pw_end,
807 pwend_str, sizeof(pwend_str), TRUE);
808 kdc_log(context, config, 0,
809 "Server's key has expired at -- %s",
810 pwend_str, server_name);
811 return KRB5KDC_ERR_KEY_EXPIRED;
818 * Return TRUE if `from' is part of `addresses' taking into consideration
819 * the configuration variables that tells us how strict we should be about
824 _kdc_check_addresses(krb5_context context,
825 krb5_kdc_configuration *config,
826 HostAddresses *addresses, const struct sockaddr *from)
831 krb5_boolean only_netbios = TRUE;
834 if(config->check_ticket_addresses == 0)
837 if(addresses == NULL)
838 return config->allow_null_ticket_addresses;
840 for (i = 0; i < addresses->len; ++i) {
841 if (addresses->val[i].addr_type != KRB5_ADDRESS_NETBIOS) {
842 only_netbios = FALSE;
846 /* Windows sends it's netbios name, which I can only assume is
847 * used for the 'allowed workstations' check. This is painful,
848 * but we still want to check IP addresses if they happen to be
853 return config->allow_null_ticket_addresses;
855 ret = krb5_sockaddr2address (context, from, &addr);
859 result = krb5_address_search(context, &addr, addresses);
860 krb5_free_address (context, &addr);
869 send_pac_p(krb5_context context, KDC_REQ *req)
872 PA_PAC_REQUEST pacreq;
876 pa = _kdc_find_padata(req, &i, KRB5_PADATA_PA_PAC_REQUEST);
880 ret = decode_PA_PAC_REQUEST(pa->padata_value.data,
881 pa->padata_value.length,
886 i = pacreq.include_pac;
887 free_PA_PAC_REQUEST(&pacreq);
898 _kdc_as_rep(krb5_context context,
899 krb5_kdc_configuration *config,
901 const krb5_data *req_buffer,
904 struct sockaddr *from_addr,
907 KDC_REQ_BODY *b = &req->req_body;
909 KDCOptions f = b->kdc_options;
910 hdb_entry_ex *client = NULL, *server = NULL;
911 krb5_enctype cetype, setype, sessionetype;
914 krb5_principal client_princ = NULL, server_princ = NULL;
915 char *client_name = NULL, *server_name = NULL;
916 krb5_error_code ret = 0;
917 const char *e_text = NULL;
920 EncryptionKey *reply_key;
922 pk_client_params *pkp = NULL;
925 memset(&rep, 0, sizeof(rep));
927 if(b->sname == NULL){
928 ret = KRB5KRB_ERR_GENERIC;
929 e_text = "No server in request";
931 _krb5_principalname2krb5_principal (context,
935 ret = krb5_unparse_name(context, server_princ, &server_name);
938 kdc_log(context, config, 0,
939 "AS-REQ malformed server name from %s", from);
943 if(b->cname == NULL){
944 ret = KRB5KRB_ERR_GENERIC;
945 e_text = "No client in request";
947 _krb5_principalname2krb5_principal (context,
951 ret = krb5_unparse_name(context, client_princ, &client_name);
954 kdc_log(context, config, 0,
955 "AS-REQ malformed client name from %s", from);
959 kdc_log(context, config, 0, "AS-REQ %s from %s for %s",
960 client_name, from, server_name);
962 ret = _kdc_db_fetch(context, config, client_princ,
963 HDB_F_GET_CLIENT, NULL, &client);
965 kdc_log(context, config, 0, "UNKNOWN -- %s: %s", client_name,
966 krb5_get_err_text(context, ret));
967 ret = KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN;
971 ret = _kdc_db_fetch(context, config, server_princ,
972 HDB_F_GET_SERVER|HDB_F_GET_KRBTGT,
975 kdc_log(context, config, 0, "UNKNOWN -- %s: %s", server_name,
976 krb5_get_err_text(context, ret));
977 ret = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
981 ret = _kdc_windc_client_access(context, client, req);
985 ret = _kdc_check_flags(context, config,
992 memset(&et, 0, sizeof(et));
993 memset(&ek, 0, sizeof(ek));
1000 log_patypes(context, config, req->padata);
1003 kdc_log(context, config, 5,
1004 "Looking for PKINIT pa-data -- %s", client_name);
1006 e_text = "No PKINIT PA found";
1009 if ((pa = _kdc_find_padata(req, &i, KRB5_PADATA_PK_AS_REQ)))
1013 if((pa = _kdc_find_padata(req, &i, KRB5_PADATA_PK_AS_REQ_WIN)))
1017 char *client_cert = NULL;
1019 ret = _kdc_pk_rd_padata(context, config, req, pa, &pkp);
1021 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1022 kdc_log(context, config, 5,
1023 "Failed to decode PKINIT PA-DATA -- %s",
1027 if (ret == 0 && pkp == NULL)
1030 ret = _kdc_pk_check_client(context,
1036 e_text = "PKINIT certificate not allowed to "
1037 "impersonate principal";
1038 _kdc_pk_free_client_param(context, pkp);
1040 kdc_log(context, config, 0, "%s", e_text);
1045 et.flags.pre_authent = 1;
1046 kdc_log(context, config, 0,
1047 "PKINIT pre-authentication succeeded -- %s using %s",
1048 client_name, client_cert);
1055 kdc_log(context, config, 5, "Looking for ENC-TS pa-data -- %s",
1059 e_text = "No ENC-TS found";
1060 while((pa = _kdc_find_padata(req, &i, KRB5_PADATA_ENC_TIMESTAMP))){
1064 EncryptedData enc_data;
1070 ret = decode_EncryptedData(pa->padata_value.data,
1071 pa->padata_value.length,
1075 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1076 kdc_log(context, config, 5, "Failed to decode PA-DATA -- %s",
1081 ret = hdb_enctype2key(context, &client->entry,
1082 enc_data.etype, &pa_key);
1085 e_text = "No key matches pa-data";
1086 ret = KRB5KDC_ERR_PREAUTH_FAILED;
1087 if(krb5_enctype_to_string(context, enc_data.etype, &estr))
1090 kdc_log(context, config, 5,
1091 "No client key matching pa-data (%d) -- %s",
1092 enc_data.etype, client_name);
1094 kdc_log(context, config, 5,
1095 "No client key matching pa-data (%s) -- %s",
1099 free_EncryptedData(&enc_data);
1104 ret = krb5_crypto_init(context, &pa_key->key, 0, &crypto);
1106 kdc_log(context, config, 0, "krb5_crypto_init failed: %s",
1107 krb5_get_err_text(context, ret));
1108 free_EncryptedData(&enc_data);
1112 ret = krb5_decrypt_EncryptedData (context,
1114 KRB5_KU_PA_ENC_TIMESTAMP,
1117 krb5_crypto_destroy(context, crypto);
1119 krb5_error_code ret2;
1120 ret2 = krb5_enctype_to_string(context,
1121 pa_key->key.keytype, &str);
1124 kdc_log(context, config, 5,
1125 "Failed to decrypt PA-DATA -- %s "
1126 "(enctype %s) error %s",
1128 str ? str : "unknown enctype",
1129 krb5_get_err_text(context, ret));
1132 if(hdb_next_enctype2key(context, &client->entry,
1133 enc_data.etype, &pa_key) == 0)
1135 e_text = "Failed to decrypt PA-DATA";
1137 free_EncryptedData(&enc_data);
1138 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1141 free_EncryptedData(&enc_data);
1142 ret = decode_PA_ENC_TS_ENC(ts_data.data,
1146 krb5_data_free(&ts_data);
1148 e_text = "Failed to decode PA-ENC-TS-ENC";
1149 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1150 kdc_log(context, config,
1151 5, "Failed to decode PA-ENC-TS_ENC -- %s",
1155 free_PA_ENC_TS_ENC(&p);
1156 if (abs(kdc_time - p.patimestamp) > context->max_skew) {
1157 char client_time[100];
1159 krb5_format_time(context, p.patimestamp,
1160 client_time, sizeof(client_time), TRUE);
1162 ret = KRB5KRB_AP_ERR_SKEW;
1163 kdc_log(context, config, 0,
1164 "Too large time skew, "
1165 "client time %s is out by %u > %u seconds -- %s",
1167 (unsigned)abs(kdc_time - p.patimestamp),
1171 * the following is needed to make windows clients
1172 * to retry using the timestamp in the error message
1174 * this is maybe a bug in windows to not trying when e_text
1180 et.flags.pre_authent = 1;
1182 ret = krb5_enctype_to_string(context,pa_key->key.keytype, &str);
1186 kdc_log(context, config, 2,
1187 "ENC-TS Pre-authentication succeeded -- %s using %s",
1188 client_name, str ? str : "unknown enctype");
1195 if(found_pa == 0 && config->require_preauth)
1197 /* We come here if we found a pa-enc-timestamp, but if there
1198 was some problem with it, other than too large skew */
1199 if(found_pa && et.flags.pre_authent == 0){
1200 kdc_log(context, config, 0, "%s -- %s", e_text, client_name);
1204 }else if (config->require_preauth
1205 || client->entry.flags.require_preauth
1206 || server->entry.flags.require_preauth) {
1207 METHOD_DATA method_data;
1214 method_data.len = 0;
1215 method_data.val = NULL;
1217 ret = realloc_method_data(&method_data);
1218 pa = &method_data.val[method_data.len-1];
1219 pa->padata_type = KRB5_PADATA_ENC_TIMESTAMP;
1220 pa->padata_value.length = 0;
1221 pa->padata_value.data = NULL;
1224 ret = realloc_method_data(&method_data);
1225 pa = &method_data.val[method_data.len-1];
1226 pa->padata_type = KRB5_PADATA_PK_AS_REQ;
1227 pa->padata_value.length = 0;
1228 pa->padata_value.data = NULL;
1233 * - If the client only knows about old enctypes, then send
1234 * both info replies (we send 'info' first in the list).
1235 * - If the client is 'modern', because it knows about 'new'
1236 * enctype types, then only send the 'info2' reply.
1240 if (only_older_enctype_p(req))
1241 ret = get_pa_etype_info(context, config,
1242 &method_data, &client->entry,
1243 b->etype.val, b->etype.len);
1245 ret = get_pa_etype_info2(context, config, &method_data,
1246 &client->entry, b->etype.val, b->etype.len);
1249 ASN1_MALLOC_ENCODE(METHOD_DATA, buf, len, &method_data, &len, ret);
1250 free_METHOD_DATA(&method_data);
1251 foo_data.data = buf;
1252 foo_data.length = len;
1254 ret = KRB5KDC_ERR_PREAUTH_REQUIRED;
1255 krb5_mk_error(context,
1257 "Need to use PA-ENC-TIMESTAMP/PA-PK-AS-REQ",
1265 kdc_log(context, config, 0,
1266 "No preauth found, returning PREAUTH-REQUIRED -- %s",
1273 * Find the client key (for preauth ENC-TS verification and reply
1274 * encryption). Then the best encryption type for the KDC and
1275 * last the best session key that shared between the client and
1276 * KDC runtime enctypes.
1279 ret = _kdc_find_etype(context, client, b->etype.val, b->etype.len,
1282 kdc_log(context, config, 0,
1283 "Client (%s) has no support for etypes", client_name);
1287 ret = _kdc_get_preferred_key(context, config,
1288 server, server_name,
1294 const krb5_enctype *p;
1297 p = krb5_kerberos_enctypes(context);
1299 sessionetype = ETYPE_NULL;
1301 for (i = 0; p[i] != ETYPE_NULL && sessionetype == ETYPE_NULL; i++) {
1302 /* check it's valid */
1303 if (krb5_enctype_valid(context, p[i]) != 0)
1306 /* check if the client supports it */
1307 for (j = 0; j < b->etype.len && sessionetype == ETYPE_NULL; j++) {
1308 if (p[i] == b->etype.val[j]) {
1310 * if the server (krbtgt) has explicit etypes,
1311 * check if it also supports it
1313 if (server->entry.etypes) {
1314 for (y = 0; y < server->entry.etypes->len; y++) {
1315 if (p[i] == server->entry.etypes->val[y]) {
1316 sessionetype = p[i];
1321 sessionetype = p[i];
1327 if (sessionetype == ETYPE_NULL) {
1328 kdc_log(context, config, 0,
1329 "Client (%s) from %s has no common enctypes with KDC"
1330 "to use for the session key",
1336 log_as_req(context, config, cetype, setype, b);
1338 if(f.renew || f.validate || f.proxy || f.forwarded || f.enc_tkt_in_skey
1339 || (f.request_anonymous && !config->allow_anonymous)) {
1340 ret = KRB5KDC_ERR_BADOPTION;
1341 kdc_log(context, config, 0, "Bad KDC options -- %s", client_name);
1346 rep.msg_type = krb_as_rep;
1347 copy_Realm(&client->entry.principal->realm, &rep.crealm);
1348 if (f.request_anonymous)
1349 _kdc_make_anonymous_principalname (&rep.cname);
1351 _krb5_principal2principalname(&rep.cname,
1352 client->entry.principal);
1353 rep.ticket.tkt_vno = 5;
1354 copy_Realm(&server->entry.principal->realm, &rep.ticket.realm);
1355 _krb5_principal2principalname(&rep.ticket.sname,
1356 server->entry.principal);
1358 et.flags.initial = 1;
1359 if(client->entry.flags.forwardable && server->entry.flags.forwardable)
1360 et.flags.forwardable = f.forwardable;
1361 else if (f.forwardable) {
1362 ret = KRB5KDC_ERR_POLICY;
1363 kdc_log(context, config, 0,
1364 "Ticket may not be forwardable -- %s", client_name);
1367 if(client->entry.flags.proxiable && server->entry.flags.proxiable)
1368 et.flags.proxiable = f.proxiable;
1369 else if (f.proxiable) {
1370 ret = KRB5KDC_ERR_POLICY;
1371 kdc_log(context, config, 0,
1372 "Ticket may not be proxiable -- %s", client_name);
1375 if(client->entry.flags.postdate && server->entry.flags.postdate)
1376 et.flags.may_postdate = f.allow_postdate;
1377 else if (f.allow_postdate){
1378 ret = KRB5KDC_ERR_POLICY;
1379 kdc_log(context, config, 0,
1380 "Ticket may not be postdatable -- %s", client_name);
1384 /* check for valid set of addresses */
1385 if(!_kdc_check_addresses(context, config, b->addresses, from_addr)) {
1386 ret = KRB5KRB_AP_ERR_BADADDR;
1387 kdc_log(context, config, 0,
1388 "Bad address list requested -- %s", client_name);
1392 ret = krb5_generate_random_keyblock(context, sessionetype, &et.key);
1395 copy_PrincipalName(&rep.cname, &et.cname);
1396 copy_Realm(&rep.crealm, &et.crealm);
1402 start = et.authtime = kdc_time;
1404 if(f.postdated && req->req_body.from){
1405 ALLOC(et.starttime);
1406 start = *et.starttime = *req->req_body.from;
1407 et.flags.invalid = 1;
1408 et.flags.postdated = 1; /* XXX ??? */
1410 _kdc_fix_time(&b->till);
1413 /* be careful not overflowing */
1415 if(client->entry.max_life)
1416 t = start + min(t - start, *client->entry.max_life);
1417 if(server->entry.max_life)
1418 t = start + min(t - start, *server->entry.max_life);
1420 t = min(t, start + realm->max_life);
1423 if(f.renewable_ok && et.endtime < *b->till){
1425 if(b->rtime == NULL){
1429 if(*b->rtime < *b->till)
1430 *b->rtime = *b->till;
1432 if(f.renewable && b->rtime){
1436 if(client->entry.max_renew)
1437 t = start + min(t - start, *client->entry.max_renew);
1438 if(server->entry.max_renew)
1439 t = start + min(t - start, *server->entry.max_renew);
1441 t = min(t, start + realm->max_renew);
1443 ALLOC(et.renew_till);
1445 et.flags.renewable = 1;
1449 if (f.request_anonymous)
1450 et.flags.anonymous = 1;
1454 copy_HostAddresses(b->addresses, et.caddr);
1457 et.transited.tr_type = DOMAIN_X500_COMPRESS;
1458 krb5_data_zero(&et.transited.contents);
1460 copy_EncryptionKey(&et.key, &ek.key);
1462 /* The MIT ASN.1 library (obviously) doesn't tell lengths encoded
1463 * as 0 and as 0x80 (meaning indefinite length) apart, and is thus
1464 * incapable of correctly decoding SEQUENCE OF's of zero length.
1466 * To fix this, always send at least one no-op last_req
1468 * If there's a pw_end or valid_end we will use that,
1469 * otherwise just a dummy lr.
1471 ek.last_req.val = malloc(2 * sizeof(*ek.last_req.val));
1472 ek.last_req.len = 0;
1473 if (client->entry.pw_end
1474 && (config->kdc_warn_pwexpire == 0
1475 || kdc_time + config->kdc_warn_pwexpire >= *client->entry.pw_end)) {
1476 ek.last_req.val[ek.last_req.len].lr_type = LR_PW_EXPTIME;
1477 ek.last_req.val[ek.last_req.len].lr_value = *client->entry.pw_end;
1480 if (client->entry.valid_end) {
1481 ek.last_req.val[ek.last_req.len].lr_type = LR_ACCT_EXPTIME;
1482 ek.last_req.val[ek.last_req.len].lr_value = *client->entry.valid_end;
1485 if (ek.last_req.len == 0) {
1486 ek.last_req.val[ek.last_req.len].lr_type = LR_NONE;
1487 ek.last_req.val[ek.last_req.len].lr_value = 0;
1490 ek.nonce = b->nonce;
1491 if (client->entry.valid_end || client->entry.pw_end) {
1492 ALLOC(ek.key_expiration);
1493 if (client->entry.valid_end) {
1494 if (client->entry.pw_end)
1495 *ek.key_expiration = min(*client->entry.valid_end,
1496 *client->entry.pw_end);
1498 *ek.key_expiration = *client->entry.valid_end;
1500 *ek.key_expiration = *client->entry.pw_end;
1502 ek.key_expiration = NULL;
1503 ek.flags = et.flags;
1504 ek.authtime = et.authtime;
1506 ALLOC(ek.starttime);
1507 *ek.starttime = *et.starttime;
1509 ek.endtime = et.endtime;
1510 if (et.renew_till) {
1511 ALLOC(ek.renew_till);
1512 *ek.renew_till = *et.renew_till;
1514 copy_Realm(&rep.ticket.realm, &ek.srealm);
1515 copy_PrincipalName(&rep.ticket.sname, &ek.sname);
1518 copy_HostAddresses(et.caddr, ek.caddr);
1522 rep.padata->len = 0;
1523 rep.padata->val = NULL;
1525 reply_key = &ckey->key;
1528 ret = _kdc_pk_mk_pa_reply(context, config, pkp, client,
1530 &reply_key, rep.padata);
1533 ret = _kdc_add_inital_verified_cas(context,
1542 set_salt_padata (rep.padata, ckey->salt);
1544 if (rep.padata->len == 0) {
1550 if (send_pac_p(context, req)) {
1554 ret = _kdc_pac_generate(context, client, &p);
1556 kdc_log(context, config, 0, "PAC generation failed for -- %s",
1561 ret = _krb5_pac_sign(context, p, et.authtime,
1562 client->entry.principal,
1563 &skey->key, /* Server key */
1564 &skey->key, /* FIXME: should be krbtgt key */
1566 krb5_pac_free(context, p);
1568 kdc_log(context, config, 0, "PAC signing failed for -- %s",
1573 ret = _kdc_tkt_add_if_relevant_ad(context, &et,
1574 KRB5_AUTHDATA_WIN2K_PAC,
1576 krb5_data_free(&data);
1582 _kdc_log_timestamp(context, config, "AS-REQ", et.authtime, et.starttime,
1583 et.endtime, et.renew_till);
1585 /* do this as the last thing since this signs the EncTicketPart */
1586 ret = _kdc_add_KRB5SignedPath(context,
1596 ret = _kdc_encode_reply(context, config,
1597 &rep, &et, &ek, setype, server->entry.kvno,
1598 &skey->key, client->entry.kvno,
1599 reply_key, &e_text, reply);
1600 free_EncTicketPart(&et);
1601 free_EncKDCRepPart(&ek);
1606 if (datagram_reply && reply->length > config->max_datagram_reply_length) {
1607 krb5_data_free(reply);
1608 ret = KRB5KRB_ERR_RESPONSE_TOO_BIG;
1609 e_text = "Reply packet too large";
1615 krb5_mk_error(context,
1629 _kdc_pk_free_client_param(context, pkp);
1632 krb5_free_principal(context, client_princ);
1635 krb5_free_principal(context, server_princ);
1638 _kdc_free_ent(context, client);
1640 _kdc_free_ent(context, server);
1645 * Add the AuthorizationData `data´ of `type´ to the last element in
1646 * the sequence of authorization_data in `tkt´ wrapped in an IF_RELEVANT
1650 _kdc_tkt_add_if_relevant_ad(krb5_context context,
1653 const krb5_data *data)
1655 krb5_error_code ret;
1658 if (tkt->authorization_data == NULL) {
1659 tkt->authorization_data = calloc(1, sizeof(*tkt->authorization_data));
1660 if (tkt->authorization_data == NULL) {
1661 krb5_set_error_string(context, "out of memory");
1666 /* add the entry to the last element */
1668 AuthorizationData ad = { 0, NULL };
1669 AuthorizationDataElement ade;
1672 ade.ad_data = *data;
1674 ret = add_AuthorizationData(&ad, &ade);
1676 krb5_set_error_string(context, "add AuthorizationData failed");
1680 ade.ad_type = KRB5_AUTHDATA_IF_RELEVANT;
1682 ASN1_MALLOC_ENCODE(AuthorizationData,
1683 ade.ad_data.data, ade.ad_data.length,
1685 free_AuthorizationData(&ad);
1687 krb5_set_error_string(context, "ASN.1 encode of "
1688 "AuthorizationData failed");
1691 if (ade.ad_data.length != size)
1692 krb5_abortx(context, "internal asn.1 encoder error");
1694 ret = add_AuthorizationData(tkt->authorization_data, &ade);
1695 der_free_octet_string(&ade.ad_data);
1697 krb5_set_error_string(context, "add AuthorizationData failed");