A somewhat working 524-protocol module.
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@2985 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Johan Danielsson
158
kdc/524.c
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158
kdc/524.c
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/*
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* Copyright (c) 1997 Kungliga Tekniska H<>gskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Kungliga Tekniska
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* H<>gskolan and its contributors.
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*
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* 4. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "kdc_locl.h"
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RCSID("$Id$");
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#ifdef KRB4
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do_524(Ticket *t, krb5_data *reply, const char *from)
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{
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krb5_error_code ret;
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krb5_principal sprinc = NULL;
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hdb_entry *server;
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Key *skey, *ekey = NULL;
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krb5_data et_data;
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EncTicketPart et;
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EncryptedData ticket;
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krb5_storage *sp;
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char *spn = NULL;
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unsigned char buf[MAX_KTXT_LEN + 4 * 4];
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size_t len;
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principalname2krb5_principal(&sprinc, t->sname, t->realm);
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krb5_unparse_name(context, sprinc, &spn);
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server = db_fetch(sprinc);
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if(server == NULL){
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kdc_log(0, "Request to convert ticket from %s for unknown principal %s",
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from, spn);
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goto out;
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}
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ret = hdb_etype2key(context, server, t->enc_part.etype, &skey);
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if(ret){
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kdc_log(0, "No suitable key found for server (%s) "
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"when converting ticket from ", spn, from);
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goto out;
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}
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ekey = unseal_key(skey);
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ret = krb5_decrypt (context,
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t->enc_part.cipher.data,
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t->enc_part.cipher.length,
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t->enc_part.etype,
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&ekey->key,
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&et_data);
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hdb_free_key(ekey);
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if(ret){
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kdc_log(0, "Failed to decrypt ticket from %s for %s", from, spn);
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goto out;
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}
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ret = decode_EncTicketPart(et_data.data, et_data.length, &et, &len);
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krb5_data_free(&et_data);
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if(ret){
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kdc_log(0, "Failed to decode ticket from %s for %s", from, spn);
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goto out;
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}
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{
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krb5_principal client;
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char *cpn;
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principalname2krb5_principal(&client, et.cname, et.crealm);
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krb5_unparse_name(context, client, &cpn);
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kdc_log(1, "524-REQ %s from %s for %s", cpn, from, spn);
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free(cpn);
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krb5_free_principal(context, client);
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}
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if(et.endtime < kdc_time){
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kdc_log(0, "Ticket expired (%s)", spn);
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free_EncTicketPart(&et);
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ret = KRB5KRB_AP_ERR_TKT_EXPIRED;
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goto out;
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}
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if(et.flags.invalid){
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kdc_log(0, "Ticket not valid (%s)", spn);
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free_EncTicketPart(&et);
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ret = KRB5KRB_AP_ERR_TKT_NYV;
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goto out;
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}
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ret = encode_v4_ticket(buf + sizeof(buf) - 1, sizeof(buf),
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&et, &t->sname, &len);
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free_EncTicketPart(&et);
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if(ret){
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kdc_log(0, "Failed to encode v4 ticket (%s)", spn);
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goto out;
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}
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ret = hdb_etype2key(context, server, KEYTYPE_DES, &skey);
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if(ret){
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kdc_log(0, "No DES key for server (%s)", spn);
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goto out;
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}
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ekey = unseal_key(skey);
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ret = encrypt_v4_ticket(buf + sizeof(buf) - len, len,
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ekey->key.keyvalue.data, &ticket);
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hdb_free_key(ekey);
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if(ret){
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kdc_log(0, "Failed to encrypt v4 ticket (%s)", spn);
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goto out;
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}
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out:
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/* make reply */
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memset(buf, 0, sizeof(buf));
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sp = krb5_storage_from_mem(buf, sizeof(buf));
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krb5_store_int32(sp, ret);
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if(ret == 0){
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krb5_store_int32(sp, server->kvno); /* is this right? */
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krb5_store_data(sp, ticket.cipher);
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/* Aargh! This is coded as a KTEXT_ST. */
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sp->seek(sp, MAX_KTXT_LEN - ticket.cipher.length, SEEK_CUR);
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krb5_store_int32(sp, 0); /* mbz */
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free_EncryptedData(&ticket);
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}
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ret = krb5_storage_to_data(sp, reply);
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krb5_storage_free(sp);
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if(spn)
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free(spn);
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if(sprinc)
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krb5_free_principal(context, sprinc);
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hdb_free_entry(context, server);
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free(server);
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}
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#endif
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