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/*
* Copyright (c) 1995, 1996, 1997, 1998 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: cr_err_reply.c,v 1.11 1999/12/02 16:58:41 joda Exp $");
/*
* This routine is used by the Kerberos authentication server to
* create an error reply packet to send back to its client.
*
* It takes a pointer to the packet to be built, the name, instance,
* and realm of the principal, the client's timestamp, an error code
* and an error string as arguments. Its return value is undefined.
*
* The packet is built in the following format:
*
* type variable data
* or constant
* ---- ----------- ----
*
* unsigned char req_ack_vno protocol version number
*
* unsigned char AUTH_MSG_ERR_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 long e error code
*
* string e_string error text
*/
int
cr_err_reply(KTEXT pkt, char *pname, char *pinst, char *prealm,
u_int32_t time_ws, u_int32_t e, char *e_string)
{
unsigned char *p = pkt->dat;
int tmp;
size_t rem = sizeof(pkt->dat);
tmp = krb_put_int(KRB_PROT_VERSION, p, rem, 1);
if (tmp < 0)
return -1;
p += tmp;
rem -= tmp;
tmp = krb_put_int(AUTH_MSG_ERR_REPLY, p, rem, 1);
if (tmp < 0)
return -1;
p += tmp;
rem -= tmp;
if (pname == NULL) pname = "";
if (pinst == NULL) pinst = "";
if (prealm == NULL) prealm = "";
tmp = krb_put_nir(pname, pinst, prealm, p, rem);
if (tmp < 0)
return -1;
p += tmp;
rem -= tmp;
tmp = krb_put_int(time_ws, p, rem, 4);
if (tmp < 0)
return -1;
p += tmp;
rem -= tmp;
tmp = krb_put_int(e, p, rem, 4);
if (tmp < 0)
return -1;
p += tmp;
rem -= tmp;
tmp = krb_put_string(e_string, p, rem);
if (tmp < 0)
return -1;
p += tmp;
rem -= tmp;
pkt->length = p - pkt->dat;
return 0;
}
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