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/*
* Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "krb_locl.h"
RCSID("$Id: create_ticket.c,v 1.14 1999/12/02 16:58:41 joda Exp $");
/*
* Create ticket takes as arguments information that should be in a
* ticket, and the KTEXT object in which the ticket should be
* constructed. It then constructs a ticket and returns, leaving the
* newly created ticket in tkt.
* The length of the ticket is a multiple of
* eight bytes and is in tkt->length.
*
* If the ticket is too long, the ticket will contain nulls.
*
* The corresponding routine to extract information from a ticket it
* decomp_ticket. When changes are made to this routine, the
* corresponding changes should also be made to that file.
*
* The packet is built in the following format:
*
* variable
* type or constant data
* ---- ----------- ----
*
* tkt->length length of ticket (multiple of 8 bytes)
*
* tkt->dat:
*
* unsigned char flags namely, HOST_BYTE_ORDER
*
* string pname client's name
*
* string pinstance client's instance
*
* string prealm client's realm
*
* 4 bytes paddress client's address
*
* 8 bytes session session key
*
* 1 byte life ticket lifetime
*
* 4 bytes time_sec KDC timestamp
*
* string sname service's name
*
* string sinstance service's instance
*
* <=7 bytes null null pad to 8 byte multiple
*
*/
int
krb_create_ticket(KTEXT tkt, /* Gets filled in by the ticket */
unsigned char flags, /* Various Kerberos flags */
char *pname, /* Principal's name */
char *pinstance, /* Principal's instance */
char *prealm, /* Principal's authentication domain */
int32_t paddress, /* Net address of requesting entity */
void *session, /* Session key inserted in ticket */
int16_t life, /* Lifetime of the ticket */
int32_t time_sec, /* Issue time and date */
char *sname, /* Service Name */
char *sinstance, /* Instance Name */
des_cblock *key) /* Service's secret key */
{
unsigned char *p = tkt->dat;
int tmp;
size_t rem = sizeof(tkt->dat);
memset(tkt, 0, sizeof(KTEXT_ST));
tmp = krb_put_int(flags, p, rem, 1);
if (tmp < 0)
return KFAILURE;
p += tmp;
rem -= tmp;
tmp = krb_put_nir(pname, pinstance, prealm, p, rem);
if (tmp < 0)
return KFAILURE;
p += tmp;
rem -= tmp;
tmp = krb_put_address(paddress, p, rem);
if (tmp < 0)
return KFAILURE;
p += tmp;
rem -= tmp;
if (rem < 8)
return KFAILURE;
memcpy(p, session, 8);
p += 8;
rem -= 8;
tmp = krb_put_int(life, p, rem, 1);
if (tmp < 0)
return KFAILURE;
p += tmp;
rem -= tmp;
tmp = krb_put_int(time_sec, p, rem, 4);
if (tmp < 0)
return KFAILURE;
p += tmp;
rem -= tmp;
tmp = krb_put_nir(sname, sinstance, NULL, p, rem);
if (tmp < 0)
return KFAILURE;
p += tmp;
rem -= tmp;
/* multiple of eight bytes */
tkt->length = (p - tkt->dat + 7) & ~7;
/* Check length of ticket */
if (tkt->length > (sizeof(KTEXT_ST) - 7)) {
memset(tkt->dat, 0, tkt->length);
tkt->length = 0;
return KFAILURE /* XXX */;
}
encrypt_ktext(tkt, key, DES_ENCRYPT);
return KSUCCESS;
}
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