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/*
* Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
* 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_cookie_response:
* create a COOKIE_RESPONSE packet; return -1 on failure, 0 on success
*
*/
#ifndef lint
static char rcsid[] = "$Id: photuris_cookie_response.c,v 1.1 1998/11/14 23:37:26 deraadt Exp $";
#endif
#include <stdio.h>
#include <string.h>
#include "config.h"
#include "photuris.h"
#include "packets.h"
#include "state.h"
#include "cookie.h"
#include "server.h"
/* XXX - on value_request receive we need to set the responder schemes */
int
photuris_cookie_response(struct stateob *st, u_char *buffer, int *size,
u_int8_t *icookie, u_int8_t counter,
u_int8_t *address, u_int16_t port,
u_int8_t *schemes, u_int16_t ssize)
{
struct cookie_response *header;
struct stateob tempst;
if (*size < COOKIE_RESPONSE_MIN + ssize)
return -1; /* buffer not large enough */
header = (struct cookie_response *) buffer;
/* Copy list of schemes */
bcopy(schemes, COOKIE_RESPONSE_SCHEMES(header), ssize);
/* XXX - There are no state information at this phase */
bzero((char *)&tempst, sizeof(tempst)); /* Set up temp. state */
tempst.initiator = 0; /* We are the Responder */
bcopy(icookie, tempst.icookie, COOKIE_SIZE);
strncpy(tempst.address, address, 15);
tempst.port = global_port;
bcopy(tempst.icookie, header->icookie, COOKIE_SIZE);
if (st == NULL)
tempst.counter = counter + 1;
else
tempst.counter = st->counter + 1;
if (tempst.counter == 0)
tempst.counter = 1;
cookie_generate(&tempst, header->rcookie, COOKIE_SIZE, schemes, ssize);
header->counter = tempst.counter;
header->type = COOKIE_RESPONSE;
*size = COOKIE_RESPONSE_MIN + ssize;
return 0;
}
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