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/* $OpenBSD: photuris_value_request.c,v 1.4 2002/06/09 08:13:08 todd Exp $ */
/*
* Copyright 1997-2000 Niels Provos <provos@citi.umich.edu>
* 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 Niels Provos.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* photuris_value_request:
* create a VALUE_REQUEST packet; return -1 on failure, 0 on success
*
*/
#ifndef lint
static char rcsid[] = "$OpenBSD: photuris_value_request.c,v 1.4 2002/06/09 08:13:08 todd Exp $";
#endif
#include <stdio.h>
#include <string.h>
#include "config.h"
#include "photuris.h"
#include "packets.h"
#include "state.h"
#include "exchange.h"
int
photuris_value_request(struct stateob *st, u_char *buffer, int *size)
{
struct value_request *header;
u_int16_t rsize, asize, tmp;
rsize = *size;
if (rsize < VALUE_REQUEST_MIN + st->oSPIoattribsize)
return -1; /* buffer not large enough */
header = (struct value_request *)buffer;
asize = VALUE_REQUEST_MIN + st->oSPIoattribsize;
rsize -= asize;
/* Generate an exchangevalue if not done already */
tmp = rsize;
if(exchange_value_generate(st, VALUE_REQUEST_VALUE(header), &tmp) == -1)
return -1;
asize += tmp;
bcopy(st->oSPIoattrib, VALUE_REQUEST_VALUE(header)+tmp,
st->oSPIoattribsize);
header = (struct value_request *) buffer;
header->type = VALUE_REQUEST;
bcopy(st->icookie, header->icookie, COOKIE_SIZE);
bcopy(st->rcookie, header->rcookie, COOKIE_SIZE);
header->counter = st->counter;
bcopy(st->scheme, header->scheme, 2 ); /* Only scheme */
bcopy(&header->counter, st->oSPITBV, 3);
*size = asize;
return 0;
}
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