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/* $OpenBSD: auth.c,v 1.2 2005/01/28 17:53:33 norby Exp $ */
/*
* Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include "ospfd.h"
#include "ospf.h"
#include "log.h"
#include "ospfe.h"
int
auth_validate(struct ospf_hdr *pkt, const struct iface *iface)
{
if (ntohs(pkt->auth_type) != (u_int16_t)iface->auth_type) {
log_debug("auth_validate: wrong auth type, interface %s",
iface->name);
return (-1);
}
switch (iface->auth_type) {
case AUTH_NONE:
break;
case AUTH_SIMPLE:
if (bcmp(pkt->auth_key.simple, iface->auth_key,
sizeof(pkt->auth_key.simple))) {
log_debug("auth_validate: wrong password, interface %s",
iface->name);
return (-1);
}
/* clear the key before chksum */
bzero(pkt->auth_key.simple,
sizeof(pkt->auth_key.simple));
break;
case AUTH_CRYPT:
log_debug("auth_validate: not supported, interface %s",
iface->name);
return (-1);
default:
log_debug("auth_validate: unknown auth type, interface %s",
iface->name);
return (-1);
}
if (in_cksum(pkt, ntohs(pkt->len))) {
log_debug("recv_packet: invalid checksum, interface %s",
iface->name);
return (-1);
}
return (0);
}
int
auth_gen(void *buf, u_int16_t len, const struct iface *iface)
{
struct ospf_hdr *ospf_hdr = buf;
/* update length, and checksum */
ospf_hdr->len = htons(len);
ospf_hdr->chksum = in_cksum(buf, len);
switch (iface->auth_type) {
case AUTH_NONE:
break;
case AUTH_SIMPLE:
strncpy(ospf_hdr->auth_key.simple, iface->auth_key,
sizeof(ospf_hdr->auth_key.simple));
break;
case AUTH_CRYPT:
log_debug("auth_gen: not supported, interface %s",
iface->name);
return (-1);
default:
log_debug("auth_gen: unknown auth type, interface %s",
iface->name);
return (-1);
}
return (0);
}
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