2 * Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the Institute nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #include "krb5_locl.h"
39 static krb5_error_code
40 get_cred_kdc_capath(krb5_context, krb5_kdc_flags,
41 krb5_ccache, krb5_creds *, krb5_principal,
42 Ticket *, krb5_creds **, krb5_creds ***);
45 * Take the `body' and encode it into `padata' using the credentials
49 static krb5_error_code
50 make_pa_tgs_req(krb5_context context,
62 ASN1_MALLOC_ENCODE(KDC_REQ_BODY, buf, buf_size, body, &len, ret);
66 krb5_abortx(context, "internal error in ASN.1 encoder");
70 ret = _krb5_mk_req_internal(context, &ac, 0, &in_data, creds,
71 &padata->padata_value,
72 KRB5_KU_TGS_REQ_AUTH_CKSUM,
73 KRB5_KU_TGS_REQ_AUTH);
78 padata->padata_type = KRB5_PADATA_TGS_REQ;
83 * Set the `enc-authorization-data' in `req_body' based on `authdata'
86 static krb5_error_code
87 set_auth_data (krb5_context context,
88 KDC_REQ_BODY *req_body,
89 krb5_authdata *authdata,
90 krb5_keyblock *subkey)
93 size_t len = 0, buf_size;
98 ASN1_MALLOC_ENCODE(AuthorizationData, buf, buf_size, authdata,
103 krb5_abortx(context, "internal error in ASN.1 encoder");
105 ALLOC(req_body->enc_authorization_data, 1);
106 if (req_body->enc_authorization_data == NULL) {
108 krb5_set_error_message(context, ENOMEM,
109 N_("malloc: out of memory", ""));
112 ret = krb5_crypto_init(context, subkey, 0, &crypto);
115 free (req_body->enc_authorization_data);
116 req_body->enc_authorization_data = NULL;
119 krb5_encrypt_EncryptedData(context,
121 KRB5_KU_TGS_REQ_AUTH_DAT_SUBKEY,
125 req_body->enc_authorization_data);
127 krb5_crypto_destroy(context, crypto);
129 req_body->enc_authorization_data = NULL;
135 * Create a tgs-req in `t' with `addresses', `flags', `second_ticket'
136 * (if not-NULL), `in_creds', `krbtgt', and returning the generated
137 * subkey in `subkey'.
140 static krb5_error_code
141 init_tgs_req (krb5_context context,
143 krb5_addresses *addresses,
144 krb5_kdc_flags flags,
145 Ticket *second_ticket,
146 krb5_creds *in_creds,
149 const METHOD_DATA *padata,
150 krb5_keyblock **subkey,
153 krb5_auth_context ac = NULL;
154 krb5_error_code ret = 0;
156 memset(t, 0, sizeof(*t));
158 t->msg_type = krb_tgs_req;
159 if (in_creds->session.keytype) {
160 ALLOC_SEQ(&t->req_body.etype, 1);
161 if(t->req_body.etype.val == NULL) {
163 krb5_set_error_message(context, ret,
164 N_("malloc: out of memory", ""));
167 t->req_body.etype.val[0] = in_creds->session.keytype;
169 ret = _krb5_init_etype(context,
170 KRB5_PDU_TGS_REQUEST,
171 &t->req_body.etype.len,
172 &t->req_body.etype.val,
177 t->req_body.addresses = addresses;
178 t->req_body.kdc_options = flags.b;
179 ret = copy_Realm(&in_creds->server->realm, &t->req_body.realm);
182 ALLOC(t->req_body.sname, 1);
183 if (t->req_body.sname == NULL) {
185 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
189 /* some versions of some code might require that the client be
190 present in TGS-REQs, but this is clearly against the spec */
192 ret = copy_PrincipalName(&in_creds->server->name, t->req_body.sname);
196 /* req_body.till should be NULL if there is no endtime specified,
197 but old MIT code (like DCE secd) doesn't like that */
198 ALLOC(t->req_body.till, 1);
199 if(t->req_body.till == NULL){
201 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
204 *t->req_body.till = in_creds->times.endtime;
206 t->req_body.nonce = nonce;
208 ALLOC(t->req_body.additional_tickets, 1);
209 if (t->req_body.additional_tickets == NULL) {
211 krb5_set_error_message(context, ret,
212 N_("malloc: out of memory", ""));
215 ALLOC_SEQ(t->req_body.additional_tickets, 1);
216 if (t->req_body.additional_tickets->val == NULL) {
218 krb5_set_error_message(context, ret,
219 N_("malloc: out of memory", ""));
222 ret = copy_Ticket(second_ticket, t->req_body.additional_tickets->val);
227 if (t->padata == NULL) {
229 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
232 ALLOC_SEQ(t->padata, 1 + padata->len);
233 if (t->padata->val == NULL) {
235 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
240 for (i = 0; i < padata->len; i++) {
241 ret = copy_PA_DATA(&padata->val[i], &t->padata->val[i + 1]);
243 krb5_set_error_message(context, ret,
244 N_("malloc: out of memory", ""));
250 ret = krb5_auth_con_init(context, &ac);
254 ret = krb5_auth_con_generatelocalsubkey(context, ac, &krbtgt->session);
258 ret = set_auth_data (context, &t->req_body, &in_creds->authdata,
263 ret = make_pa_tgs_req(context,
271 ret = krb5_auth_con_getlocalsubkey(context, ac, subkey);
277 krb5_auth_con_free(context, ac);
279 t->req_body.addresses = NULL;
286 _krb5_get_krbtgt(krb5_context context,
294 memset(&tmp_cred, 0, sizeof(tmp_cred));
296 ret = krb5_cc_get_principal(context, id, &tmp_cred.client);
300 ret = krb5_make_principal(context,
307 krb5_free_principal(context, tmp_cred.client);
310 ret = krb5_get_credentials(context,
315 krb5_free_principal(context, tmp_cred.client);
316 krb5_free_principal(context, tmp_cred.server);
322 /* DCE compatible decrypt proc */
323 static krb5_error_code KRB5_CALLCONV
324 decrypt_tkt_with_subkey (krb5_context context,
326 krb5_key_usage usage,
327 krb5_const_pointer skey,
328 krb5_kdc_rep *dec_rep)
330 const krb5_keyblock *subkey = skey;
331 krb5_error_code ret = 0;
338 krb5_data_zero(&data);
341 * start out with trying with subkey if we have one
344 ret = krb5_crypto_init(context, subkey, 0, &crypto);
347 ret = krb5_decrypt_EncryptedData (context,
349 KRB5_KU_TGS_REP_ENC_PART_SUB_KEY,
350 &dec_rep->kdc_rep.enc_part,
353 * If the is Windows 2000 DC, we need to retry with key usage
354 * 8 when doing ARCFOUR.
356 if (ret && subkey->keytype == ETYPE_ARCFOUR_HMAC_MD5) {
357 ret = krb5_decrypt_EncryptedData(context,
360 &dec_rep->kdc_rep.enc_part,
363 krb5_crypto_destroy(context, crypto);
365 if (subkey == NULL || ret) {
366 ret = krb5_crypto_init(context, key, 0, &crypto);
369 ret = krb5_decrypt_EncryptedData (context,
371 KRB5_KU_TGS_REP_ENC_PART_SESSION,
372 &dec_rep->kdc_rep.enc_part,
374 krb5_crypto_destroy(context, crypto);
379 ret = decode_EncASRepPart(data.data,
384 ret = decode_EncTGSRepPart(data.data,
389 krb5_set_error_message(context, ret,
390 N_("Failed to decode encpart in ticket", ""));
391 krb5_data_free (&data);
395 static krb5_error_code
396 get_cred_kdc(krb5_context context,
398 krb5_kdc_flags flags,
399 krb5_addresses *addresses,
400 krb5_creds *in_creds,
402 krb5_principal impersonate_principal,
403 Ticket *second_ticket,
404 krb5_creds *out_creds)
413 krb5_keyblock *subkey = NULL;
415 Ticket second_ticket_data;
418 krb5_data_zero(&resp);
419 krb5_data_zero(&enc);
423 krb5_generate_random_block(&nonce, sizeof(nonce));
426 if(flags.b.enc_tkt_in_skey && second_ticket == NULL){
427 ret = decode_Ticket(in_creds->second_ticket.data,
428 in_creds->second_ticket.length,
429 &second_ticket_data, &len);
432 second_ticket = &second_ticket_data;
436 if (impersonate_principal) {
443 self.name = impersonate_principal->name;
444 self.realm = impersonate_principal->realm;
445 self.auth = estrdup("Kerberos");
447 ret = _krb5_s4u2self_to_checksumdata(context, &self, &data);
453 ret = krb5_crypto_init(context, &krbtgt->session, 0, &crypto);
456 krb5_data_free(&data);
460 ret = krb5_create_checksum(context,
467 krb5_crypto_destroy(context, crypto);
468 krb5_data_free(&data);
474 ASN1_MALLOC_ENCODE(PA_S4U2Self, buf, len, &self, &size, ret);
476 free_Checksum(&self.cksum);
480 krb5_abortx(context, "internal asn1 error");
482 ret = krb5_padata_add(context, &padata, KRB5_PADATA_FOR_USER, buf, len);
487 ret = init_tgs_req (context,
501 ASN1_MALLOC_ENCODE(TGS_REQ, enc.data, enc.length, &req, &len, ret);
504 if(enc.length != len)
505 krb5_abortx(context, "internal error in ASN.1 encoder");
507 /* don't free addresses */
508 req.req_body.addresses = NULL;
515 krb5_sendto_ctx stctx;
516 ret = krb5_sendto_ctx_alloc(context, &stctx);
519 krb5_sendto_ctx_set_func(stctx, _krb5_kdc_retry, NULL);
521 ret = krb5_sendto_context (context, stctx, &enc,
522 krbtgt->server->name.name_string.val[1],
524 krb5_sendto_ctx_free(context, stctx);
529 memset(&rep, 0, sizeof(rep));
530 if(decode_TGS_REP(resp.data, resp.length, &rep.kdc_rep, &len) == 0) {
533 ret = krb5_copy_principal(context,
538 ret = krb5_copy_principal(context,
543 /* this should go someplace else */
544 out_creds->times.endtime = in_creds->times.endtime;
546 /* XXX should do better testing */
547 if (flags.b.constrained_delegation || impersonate_principal)
548 eflags |= EXTRACT_TICKET_ALLOW_CNAME_MISMATCH;
550 ret = _krb5_extract_ticket(context,
559 decrypt_tkt_with_subkey,
562 krb5_free_kdc_rep(context, &rep);
563 } else if(krb5_rd_error(context, &resp, &error) == 0) {
564 ret = krb5_error_from_rd_error(context, &error, in_creds);
565 krb5_free_error_contents(context, &error);
566 } else if(resp.length > 0 && ((char*)resp.data)[0] == 4) {
567 ret = KRB5KRB_AP_ERR_V4_REPLY;
568 krb5_clear_error_message(context);
570 ret = KRB5KRB_AP_ERR_MSG_TYPE;
571 krb5_clear_error_message(context);
575 if (second_ticket == &second_ticket_data)
576 free_Ticket(&second_ticket_data);
577 free_METHOD_DATA(&padata);
578 krb5_data_free(&resp);
579 krb5_data_free(&enc);
581 krb5_free_keyblock(context, subkey);
587 * same as above, just get local addresses first if the krbtgt have
588 * them and the realm is not addressless
591 static krb5_error_code
592 get_cred_kdc_address(krb5_context context,
594 krb5_kdc_flags flags,
595 krb5_addresses *addrs,
596 krb5_creds *in_creds,
598 krb5_principal impersonate_principal,
599 Ticket *second_ticket,
600 krb5_creds *out_creds)
603 krb5_addresses addresses = { 0, NULL };
606 * Inherit the address-ness of the krbtgt if the address is not
610 if (addrs == NULL && krbtgt->addresses.len != 0) {
613 krb5_appdefault_boolean(context, NULL, krbtgt->server->realm,
614 "no-addresses", FALSE, &noaddr);
617 krb5_get_all_client_addrs(context, &addresses);
618 /* XXX this sucks. */
620 if(addresses.len == 0)
624 ret = get_cred_kdc(context, id, flags, addrs, in_creds,
625 krbtgt, impersonate_principal,
626 second_ticket, out_creds);
627 krb5_free_addresses(context, &addresses);
631 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
632 krb5_get_kdc_cred(krb5_context context,
634 krb5_kdc_flags flags,
635 krb5_addresses *addresses,
636 Ticket *second_ticket,
637 krb5_creds *in_creds,
638 krb5_creds **out_creds
644 *out_creds = calloc(1, sizeof(**out_creds));
645 if(*out_creds == NULL) {
646 krb5_set_error_message(context, ENOMEM,
647 N_("malloc: out of memory", ""));
650 ret = _krb5_get_krbtgt (context,
652 in_creds->server->realm,
659 ret = get_cred_kdc(context, id, flags, addresses,
660 in_creds, krbtgt, NULL, NULL, *out_creds);
661 krb5_free_creds (context, krbtgt);
670 not_found(krb5_context context, krb5_const_principal p, krb5_error_code code)
675 ret = krb5_unparse_name(context, p, &str);
677 krb5_clear_error_message(context);
680 krb5_set_error_message(context, code,
681 N_("Matching credential (%s) not found", ""), str);
686 static krb5_error_code
687 find_cred(krb5_context context,
689 krb5_principal server,
691 krb5_creds *out_creds)
696 krb5_cc_clear_mcred(&mcreds);
697 mcreds.server = server;
698 ret = krb5_cc_retrieve_cred(context, id, KRB5_TC_DONT_MATCH_REALM,
702 while(tgts && *tgts){
703 if(krb5_compare_creds(context, KRB5_TC_DONT_MATCH_REALM,
705 ret = krb5_copy_creds_contents(context, *tgts, out_creds);
710 return not_found(context, server, KRB5_CC_NOTFOUND);
713 static krb5_error_code
714 add_cred(krb5_context context, krb5_creds const *tkt, krb5_creds ***tgts)
718 krb5_creds **tmp = *tgts;
720 for(i = 0; tmp && tmp[i]; i++); /* XXX */
721 tmp = realloc(tmp, (i+2)*sizeof(*tmp));
723 krb5_set_error_message(context, ENOMEM,
724 N_("malloc: out of memory", ""));
728 ret = krb5_copy_creds(context, tkt, &tmp[i]);
733 static krb5_error_code
734 get_cred_kdc_capath_worker(krb5_context context,
735 krb5_kdc_flags flags,
737 krb5_creds *in_creds,
738 krb5_const_realm try_realm,
739 krb5_principal impersonate_principal,
740 Ticket *second_ticket,
741 krb5_creds **out_creds,
742 krb5_creds ***ret_tgts)
745 krb5_creds *tgt, tmp_creds;
746 krb5_const_realm client_realm, server_realm;
747 int ok_as_delegate = 1;
751 client_realm = krb5_principal_get_realm(context, in_creds->client);
752 server_realm = krb5_principal_get_realm(context, in_creds->server);
753 memset(&tmp_creds, 0, sizeof(tmp_creds));
754 ret = krb5_copy_principal(context, in_creds->client, &tmp_creds.client);
758 ret = krb5_make_principal(context,
765 krb5_free_principal(context, tmp_creds.client);
771 ret = find_cred(context, ccache, tmp_creds.server,
774 /* only allow implicit ok_as_delegate if the realm is the clients realm */
775 if (strcmp(try_realm, client_realm) != 0 || strcmp(try_realm, server_realm) != 0)
776 ok_as_delegate = tgts.flags.b.ok_as_delegate;
778 *out_creds = calloc(1, sizeof(**out_creds));
779 if(*out_creds == NULL) {
781 krb5_set_error_message(context, ret,
782 N_("malloc: out of memory", ""));
784 ret = get_cred_kdc_address(context, ccache, flags, NULL,
786 impersonate_principal,
792 } else if (ok_as_delegate == 0)
793 (*out_creds)->flags.b.ok_as_delegate = 0;
795 krb5_free_cred_contents(context, &tgts);
796 krb5_free_principal(context, tmp_creds.server);
797 krb5_free_principal(context, tmp_creds.client);
801 if(krb5_realm_compare(context, in_creds->client, in_creds->server))
802 return not_found(context, in_creds->server, KRB5_CC_NOTFOUND);
804 /* XXX this can loop forever */
806 heim_general_string tgt_inst;
808 ret = get_cred_kdc_capath(context, flags, ccache, &tmp_creds,
809 NULL, NULL, &tgt, ret_tgts);
811 krb5_free_principal(context, tmp_creds.server);
812 krb5_free_principal(context, tmp_creds.client);
816 * if either of the chain or the ok_as_delegate was stripped
817 * by the kdc, make sure we strip it too.
819 if (ok_as_delegate == 0 || tgt->flags.b.ok_as_delegate == 0) {
821 tgt->flags.b.ok_as_delegate = 0;
824 ret = add_cred(context, tgt, ret_tgts);
826 krb5_free_principal(context, tmp_creds.server);
827 krb5_free_principal(context, tmp_creds.client);
830 tgt_inst = tgt->server->name.name_string.val[1];
831 if(strcmp(tgt_inst, server_realm) == 0)
833 krb5_free_principal(context, tmp_creds.server);
834 tmp_creds.server = NULL;
835 ret = krb5_make_principal(context, &tmp_creds.server,
836 tgt_inst, KRB5_TGS_NAME, server_realm, NULL);
838 krb5_free_principal(context, tmp_creds.server);
839 krb5_free_principal(context, tmp_creds.client);
842 ret = krb5_free_creds(context, tgt);
844 krb5_free_principal(context, tmp_creds.server);
845 krb5_free_principal(context, tmp_creds.client);
850 krb5_free_principal(context, tmp_creds.server);
851 krb5_free_principal(context, tmp_creds.client);
852 *out_creds = calloc(1, sizeof(**out_creds));
853 if(*out_creds == NULL) {
855 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
857 ret = get_cred_kdc_address (context, ccache, flags, NULL,
858 in_creds, tgt, impersonate_principal,
859 second_ticket, *out_creds);
865 krb5_free_creds(context, tgt);
871 creds = cc_get_cred(server)
872 if(creds) return creds
873 tgt = cc_get_cred(krbtgt/server_realm@any_realm)
875 return get_cred_tgt(server, tgt)
876 if(client_realm == server_realm)
878 tgt = get_cred(krbtgt/server_realm@client_realm)
879 while(tgt_inst != server_realm)
880 tgt = get_cred(krbtgt/server_realm@tgt_inst)
881 return get_cred_tgt(server, tgt)
884 static krb5_error_code
885 get_cred_kdc_capath(krb5_context context,
886 krb5_kdc_flags flags,
888 krb5_creds *in_creds,
889 krb5_principal impersonate_principal,
890 Ticket *second_ticket,
891 krb5_creds **out_creds,
892 krb5_creds ***ret_tgts)
895 krb5_const_realm client_realm, server_realm, try_realm;
897 client_realm = krb5_principal_get_realm(context, in_creds->client);
898 server_realm = krb5_principal_get_realm(context, in_creds->server);
900 try_realm = client_realm;
901 ret = get_cred_kdc_capath_worker(context, flags, ccache, in_creds, try_realm,
902 impersonate_principal, second_ticket, out_creds,
905 if (ret == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN) {
906 try_realm = krb5_config_get_string(context, NULL, "capaths",
907 client_realm, server_realm, NULL);
909 if (try_realm != NULL && strcmp(try_realm, client_realm)) {
910 ret = get_cred_kdc_capath_worker(context, flags, ccache, in_creds,
911 try_realm, impersonate_principal,
912 second_ticket, out_creds, ret_tgts);
919 static krb5_error_code
920 get_cred_kdc_referral(krb5_context context,
921 krb5_kdc_flags flags,
923 krb5_creds *in_creds,
924 krb5_principal impersonate_principal,
925 Ticket *second_ticket,
926 krb5_creds **out_creds,
927 krb5_creds ***ret_tgts)
929 krb5_const_realm client_realm;
931 krb5_creds tgt, referral, ticket;
933 int ok_as_delegate = 1;
935 if (in_creds->server->name.name_string.len < 2 && !flags.b.canonicalize) {
936 krb5_set_error_message(context, KRB5KDC_ERR_PATH_NOT_ACCEPTED,
937 N_("Name too short to do referals, skipping", ""));
938 return KRB5KDC_ERR_PATH_NOT_ACCEPTED;
941 memset(&tgt, 0, sizeof(tgt));
942 memset(&ticket, 0, sizeof(ticket));
944 flags.b.canonicalize = 1;
948 client_realm = krb5_principal_get_realm(context, in_creds->client);
950 /* find tgt for the clients base realm */
952 krb5_principal tgtname;
954 ret = krb5_make_principal(context, &tgtname,
962 ret = find_cred(context, ccache, tgtname, *ret_tgts, &tgt);
963 krb5_free_principal(context, tgtname);
968 referral = *in_creds;
969 ret = krb5_copy_principal(context, in_creds->server, &referral.server);
971 krb5_free_cred_contents(context, &tgt);
974 ret = krb5_principal_set_realm(context, referral.server, client_realm);
976 krb5_free_cred_contents(context, &tgt);
977 krb5_free_principal(context, referral.server);
981 while (loop++ < 17) {
982 krb5_creds **tickets;
984 char *referral_realm;
986 /* Use cache if we are not doing impersonation or contrainte deleg */
987 if (impersonate_principal == NULL || flags.b.constrained_delegation) {
988 krb5_cc_clear_mcred(&mcreds);
989 mcreds.server = referral.server;
990 ret = krb5_cc_retrieve_cred(context, ccache, 0, &mcreds, &ticket);
995 ret = get_cred_kdc_address(context, ccache, flags, NULL,
996 &referral, &tgt, impersonate_principal,
997 second_ticket, &ticket);
1002 /* Did we get the right ticket ? */
1003 if (krb5_principal_compare_any_realm(context,
1008 if (!krb5_principal_is_krbtgt(context, ticket.server)) {
1009 krb5_set_error_message(context, KRB5KRB_AP_ERR_NOT_US,
1010 N_("Got back an non krbtgt "
1011 "ticket referrals", ""));
1012 ret = KRB5KRB_AP_ERR_NOT_US;
1016 referral_realm = ticket.server->name.name_string.val[1];
1018 /* check that there are no referrals loops */
1019 tickets = *ret_tgts;
1021 krb5_cc_clear_mcred(&mcreds);
1022 mcreds.server = ticket.server;
1024 while(tickets && *tickets){
1025 if(krb5_compare_creds(context,
1026 KRB5_TC_DONT_MATCH_REALM,
1030 krb5_set_error_message(context, KRB5_GET_IN_TKT_LOOP,
1031 N_("Referral from %s "
1032 "loops back to realm %s", ""),
1035 ret = KRB5_GET_IN_TKT_LOOP;
1042 * if either of the chain or the ok_as_delegate was stripped
1043 * by the kdc, make sure we strip it too.
1046 if (ok_as_delegate == 0 || ticket.flags.b.ok_as_delegate == 0) {
1048 ticket.flags.b.ok_as_delegate = 0;
1051 ret = add_cred(context, &ticket, ret_tgts);
1055 /* try realm in the referral */
1056 ret = krb5_principal_set_realm(context,
1059 krb5_free_cred_contents(context, &tgt);
1061 memset(&ticket, 0, sizeof(ticket));
1066 ret = krb5_copy_creds(context, &ticket, out_creds);
1069 krb5_free_principal(context, referral.server);
1070 krb5_free_cred_contents(context, &tgt);
1071 krb5_free_cred_contents(context, &ticket);
1077 * Glue function between referrals version and old client chasing
1082 _krb5_get_cred_kdc_any(krb5_context context,
1083 krb5_kdc_flags flags,
1085 krb5_creds *in_creds,
1086 krb5_principal impersonate_principal,
1087 Ticket *second_ticket,
1088 krb5_creds **out_creds,
1089 krb5_creds ***ret_tgts)
1091 krb5_error_code ret;
1094 ret = krb5_cc_get_kdc_offset(context, ccache, &offset);
1096 context->kdc_sec_offset = offset;
1097 context->kdc_usec_offset = 0;
1100 ret = get_cred_kdc_referral(context,
1104 impersonate_principal,
1108 if (ret == 0 || flags.b.canonicalize)
1110 return get_cred_kdc_capath(context,
1114 impersonate_principal,
1121 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1122 krb5_get_credentials_with_flags(krb5_context context,
1124 krb5_kdc_flags flags,
1126 krb5_creds *in_creds,
1127 krb5_creds **out_creds)
1129 krb5_error_code ret;
1131 krb5_creds *res_creds;
1134 if (in_creds->session.keytype) {
1135 ret = krb5_enctype_valid(context, in_creds->session.keytype);
1141 res_creds = calloc(1, sizeof(*res_creds));
1142 if (res_creds == NULL) {
1143 krb5_set_error_message(context, ENOMEM,
1144 N_("malloc: out of memory", ""));
1148 if (in_creds->session.keytype)
1149 options |= KRB5_TC_MATCH_KEYTYPE;
1152 * If we got a credential, check if credential is expired before
1155 ret = krb5_cc_retrieve_cred(context,
1157 in_creds->session.keytype ?
1158 KRB5_TC_MATCH_KEYTYPE : 0,
1159 in_creds, res_creds);
1161 * If we got a credential, check if credential is expired before
1162 * returning it, but only if KRB5_GC_EXPIRED_OK is not set.
1165 krb5_timestamp timeret;
1167 /* If expired ok, don't bother checking */
1168 if(options & KRB5_GC_EXPIRED_OK) {
1169 *out_creds = res_creds;
1173 krb5_timeofday(context, &timeret);
1174 if(res_creds->times.endtime > timeret) {
1175 *out_creds = res_creds;
1178 if(options & KRB5_GC_CACHED)
1179 krb5_cc_remove_cred(context, ccache, 0, res_creds);
1181 } else if(ret != KRB5_CC_END) {
1186 if(options & KRB5_GC_CACHED)
1187 return not_found(context, in_creds->server, KRB5_CC_NOTFOUND);
1189 if(options & KRB5_GC_USER_USER)
1190 flags.b.enc_tkt_in_skey = 1;
1191 if (flags.b.enc_tkt_in_skey)
1192 options |= KRB5_GC_NO_STORE;
1195 ret = _krb5_get_cred_kdc_any(context, flags, ccache,
1196 in_creds, NULL, NULL, out_creds, &tgts);
1197 for(i = 0; tgts && tgts[i]; i++) {
1198 krb5_cc_store_cred(context, ccache, tgts[i]);
1199 krb5_free_creds(context, tgts[i]);
1202 if(ret == 0 && (options & KRB5_GC_NO_STORE) == 0)
1203 krb5_cc_store_cred(context, ccache, *out_creds);
1207 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1208 krb5_get_credentials(krb5_context context,
1211 krb5_creds *in_creds,
1212 krb5_creds **out_creds)
1214 krb5_kdc_flags flags;
1216 return krb5_get_credentials_with_flags(context, options, flags,
1217 ccache, in_creds, out_creds);
1220 struct krb5_get_creds_opt_data {
1221 krb5_principal self;
1223 krb5_enctype enctype;
1228 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1229 krb5_get_creds_opt_alloc(krb5_context context, krb5_get_creds_opt *opt)
1231 *opt = calloc(1, sizeof(**opt));
1233 krb5_set_error_message(context, ENOMEM,
1234 N_("malloc: out of memory", ""));
1240 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
1241 krb5_get_creds_opt_free(krb5_context context, krb5_get_creds_opt opt)
1244 krb5_free_principal(context, opt->self);
1246 free_Ticket(opt->ticket);
1249 memset(opt, 0, sizeof(*opt));
1253 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
1254 krb5_get_creds_opt_set_options(krb5_context context,
1255 krb5_get_creds_opt opt,
1258 opt->options = options;
1261 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
1262 krb5_get_creds_opt_add_options(krb5_context context,
1263 krb5_get_creds_opt opt,
1266 opt->options |= options;
1269 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
1270 krb5_get_creds_opt_set_enctype(krb5_context context,
1271 krb5_get_creds_opt opt,
1272 krb5_enctype enctype)
1274 opt->enctype = enctype;
1277 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1278 krb5_get_creds_opt_set_impersonate(krb5_context context,
1279 krb5_get_creds_opt opt,
1280 krb5_const_principal self)
1283 krb5_free_principal(context, opt->self);
1284 return krb5_copy_principal(context, self, &opt->self);
1287 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1288 krb5_get_creds_opt_set_ticket(krb5_context context,
1289 krb5_get_creds_opt opt,
1290 const Ticket *ticket)
1293 free_Ticket(opt->ticket);
1298 krb5_error_code ret;
1300 opt->ticket = malloc(sizeof(*ticket));
1301 if (opt->ticket == NULL) {
1302 krb5_set_error_message(context, ENOMEM,
1303 N_("malloc: out of memory", ""));
1306 ret = copy_Ticket(ticket, opt->ticket);
1310 krb5_set_error_message(context, ret,
1311 N_("malloc: out of memory", ""));
1320 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1321 krb5_get_creds(krb5_context context,
1322 krb5_get_creds_opt opt,
1324 krb5_const_principal inprinc,
1325 krb5_creds **out_creds)
1327 krb5_kdc_flags flags;
1329 krb5_creds in_creds;
1330 krb5_error_code ret;
1332 krb5_creds *res_creds;
1335 if (opt && opt->enctype) {
1336 ret = krb5_enctype_valid(context, opt->enctype);
1341 memset(&in_creds, 0, sizeof(in_creds));
1342 in_creds.server = rk_UNCONST(inprinc);
1344 ret = krb5_cc_get_principal(context, ccache, &in_creds.client);
1349 options = opt->options;
1355 res_creds = calloc(1, sizeof(*res_creds));
1356 if (res_creds == NULL) {
1357 krb5_free_principal(context, in_creds.client);
1358 krb5_set_error_message(context, ENOMEM,
1359 N_("malloc: out of memory", ""));
1363 if (opt && opt->enctype) {
1364 in_creds.session.keytype = opt->enctype;
1365 options |= KRB5_TC_MATCH_KEYTYPE;
1369 * If we got a credential, check if credential is expired before
1372 ret = krb5_cc_retrieve_cred(context,
1374 options & KRB5_TC_MATCH_KEYTYPE,
1375 &in_creds, res_creds);
1377 * If we got a credential, check if credential is expired before
1378 * returning it, but only if KRB5_GC_EXPIRED_OK is not set.
1381 krb5_timestamp timeret;
1383 /* If expired ok, don't bother checking */
1384 if(options & KRB5_GC_EXPIRED_OK) {
1385 *out_creds = res_creds;
1386 krb5_free_principal(context, in_creds.client);
1390 krb5_timeofday(context, &timeret);
1391 if(res_creds->times.endtime > timeret) {
1392 *out_creds = res_creds;
1393 krb5_free_principal(context, in_creds.client);
1396 if(options & KRB5_GC_CACHED)
1397 krb5_cc_remove_cred(context, ccache, 0, res_creds);
1399 } else if(ret != KRB5_CC_END) {
1401 krb5_free_principal(context, in_creds.client);
1405 if(options & KRB5_GC_CACHED) {
1406 krb5_free_principal(context, in_creds.client);
1407 ret = not_found(context, in_creds.server, KRB5_CC_NOTFOUND);
1410 if(options & KRB5_GC_USER_USER) {
1411 flags.b.enc_tkt_in_skey = 1;
1412 options |= KRB5_GC_NO_STORE;
1414 if (options & KRB5_GC_FORWARDABLE)
1415 flags.b.forwardable = 1;
1416 if (options & KRB5_GC_NO_TRANSIT_CHECK)
1417 flags.b.disable_transited_check = 1;
1418 if (options & KRB5_GC_CONSTRAINED_DELEGATION) {
1419 flags.b.request_anonymous = 1; /* XXX ARGH confusion */
1420 flags.b.constrained_delegation = 1;
1422 if (options & KRB5_GC_CANONICALIZE)
1423 flags.b.canonicalize = 1;
1426 ret = _krb5_get_cred_kdc_any(context, flags, ccache,
1427 &in_creds, opt->self, opt->ticket,
1429 krb5_free_principal(context, in_creds.client);
1430 for(i = 0; tgts && tgts[i]; i++) {
1431 krb5_cc_store_cred(context, ccache, tgts[i]);
1432 krb5_free_creds(context, tgts[i]);
1435 if(ret == 0 && (options & KRB5_GC_NO_STORE) == 0)
1436 krb5_cc_store_cred(context, ccache, *out_creds);
1439 _krb5_debug(context, 5, "krb5_get_creds: ret = %d", ret);
1448 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
1449 krb5_get_renewed_creds(krb5_context context,
1451 krb5_const_principal client,
1453 const char *in_tkt_service)
1455 krb5_error_code ret;
1456 krb5_kdc_flags flags;
1457 krb5_creds in, *template, *out = NULL;
1459 memset(&in, 0, sizeof(in));
1460 memset(creds, 0, sizeof(*creds));
1462 ret = krb5_copy_principal(context, client, &in.client);
1466 if (in_tkt_service) {
1467 ret = krb5_parse_name(context, in_tkt_service, &in.server);
1469 krb5_free_principal(context, in.client);
1473 const char *realm = krb5_principal_get_realm(context, client);
1475 ret = krb5_make_principal(context, &in.server, realm, KRB5_TGS_NAME,
1478 krb5_free_principal(context, in.client);
1484 flags.b.renewable = flags.b.renew = 1;
1487 * Get template from old credential cache for the same entry, if
1488 * this failes, no worries.
1490 ret = krb5_get_credentials(context, KRB5_GC_CACHED, ccache, &in, &template);
1492 flags.b.forwardable = template->flags.b.forwardable;
1493 flags.b.proxiable = template->flags.b.proxiable;
1494 krb5_free_creds (context, template);
1497 ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &in, &out);
1498 krb5_free_principal(context, in.client);
1499 krb5_free_principal(context, in.server);
1503 ret = krb5_copy_creds_contents(context, out, creds);
1504 krb5_free_creds(context, out);