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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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the Kungliga Tekniska
* Högskolan and its contributors.
*
* 4. 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_auth_reply.c,v 1.14 1998/06/13 00:06:59 assar Exp $");
/*
* This routine is called by the Kerberos authentication server
* to create a reply to an authentication request. The routine
* takes the user's name, instance, and realm, the client's
* timestamp, the number of tickets, the user's key version
* number and the ciphertext containing the tickets themselves.
* It constructs a packet and returns a pointer to it.
*
* Notes: The packet returned by this routine is static. Thus, if you
* intend to keep the result beyond the next call to this routine, you
* must copy it elsewhere.
*
* The packet is built in the following format:
*
* variable
* type or constant data
* ---- ----------- ----
*
* unsigned char KRB_PROT_VERSION protocol version number
*
* unsigned char AUTH_MSG_KDC_REPLY protocol message type
*
* [least significant HOST_BYTE_ORDER sender's (server's) byte
* bit of above field] order
*
* string pname principal's name
*
* string pinst principal's instance
*
* string prealm principal's realm
*
* unsigned long time_ws client's timestamp
*
* unsigned char n number of tickets
*
* unsigned long x_date expiration date
*
* unsigned char kvno master key version
*
* short w_1 cipher length
*
* --- cipher->dat cipher data
*/
KTEXT
create_auth_reply(char *pname, /* Principal's name */
char *pinst, /* Principal's instance */
char *prealm, /* Principal's authentication domain */
int32_t time_ws, /* Workstation time */
int n, /* Number of tickets */
u_int32_t x_date, /* Principal's expiration date */
int kvno, /* Principal's key version number */
KTEXT cipher) /* Cipher text with tickets and session keys */
{
static KTEXT_ST pkt_st;
KTEXT pkt = &pkt_st;
unsigned char *p = pkt->dat;
int tmp;
size_t rem = sizeof(pkt->dat);
if(n != 0)
return NULL;
tmp = krb_put_int(KRB_PROT_VERSION, p, rem, 1);
if (tmp < 0)
return NULL;
p += tmp;
rem -= tmp;
tmp = krb_put_int(AUTH_MSG_KDC_REPLY, p, rem, 1);
if (tmp < 0)
return NULL;
p += tmp;
rem -= tmp;
tmp = krb_put_nir(pname, pinst, prealm, p, rem);
if (tmp < 0)
return NULL;
p += tmp;
rem -= tmp;
tmp = krb_put_int(time_ws, p, rem, 4);
if (tmp < 0)
return NULL;
p += tmp;
rem -= tmp;
tmp = krb_put_int(n, p, rem, 1);
if (tmp < 0)
return NULL;
p += tmp;
rem -= tmp;
tmp = krb_put_int(x_date, p, rem, 4);
if (tmp < 0)
return NULL;
p += tmp;
rem -= tmp;
tmp = krb_put_int(kvno, p, rem, 1);
if (tmp < 0)
return NULL;
p += tmp;
rem -= tmp;
tmp = krb_put_int(cipher->length, p, rem, 2);
if (tmp < 0)
return NULL;
p += tmp;
rem -= tmp;
if (rem < cipher->length)
return NULL;
memcpy(p, cipher->dat, cipher->length);
p += cipher->length;
rem -= cipher->length;
pkt->length = p - pkt->dat;
return pkt;
}
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