131 lines
4.0 KiB
C
131 lines
4.0 KiB
C
/*
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* Copyright (c) 1997 Kungliga Tekniska Högskolan
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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. 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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/* implementation of krb_mk_req that uses 524 protocol */
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#include "45_locl.h"
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RCSID("$Id: mk_req.c,v 1.2 1999/12/02 17:05:01 joda Exp $");
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static int lifetime = 255;
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static void
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build_request(KTEXT req, char *name, char *inst, char *realm,
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u_int32_t checksum)
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{
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struct timeval tv;
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krb5_storage *sp;
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krb5_data data;
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sp = krb5_storage_emem();
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krb5_store_stringz(sp, name);
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krb5_store_stringz(sp, inst);
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krb5_store_stringz(sp, realm);
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krb5_store_int32(sp, checksum);
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gettimeofday(&tv, NULL);
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krb5_store_int8(sp, tv.tv_usec / 5000);
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krb5_store_int32(sp, tv.tv_sec);
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krb5_storage_to_data(sp, &data);
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krb5_storage_free(sp);
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memcpy(req->dat, data.data, data.length);
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req->length = (data.length + 7) & ~7;
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krb5_data_free(&data);
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}
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int
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krb_mk_req(KTEXT authent, char *service, char *instance, char *realm,
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int32_t checksum)
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{
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CREDENTIALS cr;
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KTEXT_ST req;
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krb5_storage *sp;
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int code;
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char *myrealm;
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krb5_data a;
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code = krb_get_cred(service, instance, realm, &cr);
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if(code || time(NULL) > krb_life_to_time(cr.issue_date, cr.lifetime)){
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code = get_ad_tkt(service, instance, realm, lifetime);
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if(code == KSUCCESS)
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code = krb_get_cred(service, instance, realm, &cr);
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}
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if(code)
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return code;
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/* XXX get user realm */
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myrealm = realm;
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sp = krb5_storage_emem();
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krb5_store_int8(sp, KRB_PROT_VERSION);
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krb5_store_int8(sp, AUTH_MSG_APPL_REQUEST);
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krb5_store_int8(sp, cr.kvno);
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krb5_store_stringz(sp, realm);
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krb5_store_int8(sp, cr.ticket_st.length);
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build_request(&req, cr.pname, cr.pinst, myrealm, checksum);
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encrypt_ktext(&req, &cr.session, DES_ENCRYPT);
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krb5_store_int8(sp, req.length);
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sp->store(sp, cr.ticket_st.dat, cr.ticket_st.length);
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sp->store(sp, req.dat, req.length);
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krb5_storage_to_data(sp, &a);
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krb5_storage_free(sp);
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memcpy(authent->dat, a.data, a.length);
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authent->length = a.length;
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krb5_data_free(&a);
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memset(&cr, 0, sizeof(cr));
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memset(&req, 0, sizeof(req));
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return KSUCCESS;
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}
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/*
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* krb_set_lifetime sets the default lifetime for additional tickets
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* obtained via krb_mk_req().
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*
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* It returns the previous value of the default lifetime.
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*/
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int
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krb_set_lifetime(int newval)
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{
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int olife = lifetime;
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lifetime = newval;
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return(olife);
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}
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