140 lines
3.9 KiB
C
140 lines
3.9 KiB
C
/* $KAME: vendorid.c,v 1.8 2001/03/27 02:39:57 thorpej Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <ctype.h>
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#include "var.h"
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#include "misc.h"
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#include "vmbuf.h"
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#include "plog.h"
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#include "debug.h"
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#include "localconf.h"
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#include "isakmp_var.h"
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#include "isakmp.h"
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#include "vendorid.h"
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#include "crypto_openssl.h"
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const char *vendorid_strings[] = VENDORID_STRINGS;
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/*
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* set hashed vendor id.
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* hash function is always MD5.
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*/
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vchar_t *
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set_vendorid(int vendorid)
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{
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vchar_t vid, *vidhash;
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if (vendorid == VENDORID_UNKNOWN) {
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/*
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* The default unknown ID gets translated to
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* KAME/racoon.
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*/
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vendorid = VENDORID_KAME;
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}
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if (vendorid < 0 || vendorid >= NUMVENDORIDS) {
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plog(LLV_ERROR, LOCATION, NULL,
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"invalid vendor ID index: %d\n", vendorid);
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return (NULL);
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}
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/* XXX Cast away const. */
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vid.v = (char *) vendorid_strings[vendorid];
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vid.l = strlen(vendorid_strings[vendorid]);
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vidhash = eay_md5_one(&vid);
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if (vidhash == NULL)
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plog(LLV_ERROR, LOCATION, NULL,
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"unable to hash vendor ID string\n");
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return vidhash;
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}
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/*
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* Check the vendor ID payload -- return the vendor ID index
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* if we find a recognized one, or UNKNOWN if we don't.
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*/
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int
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check_vendorid(gen)
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struct isakmp_gen *gen; /* points to Vendor ID payload */
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{
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vchar_t vid, *vidhash;
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int i, vidlen;
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if (gen == NULL)
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return (VENDORID_UNKNOWN);
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vidlen = ntohs(gen->len) - sizeof(*gen);
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for (i = 0; i < NUMVENDORIDS; i++) {
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/* XXX Cast away const. */
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vid.v = (char *) vendorid_strings[i];
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vid.l = strlen(vendorid_strings[i]);
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vidhash = eay_md5_one(&vid);
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if (vidhash == NULL) {
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plog(LLV_ERROR, LOCATION, NULL,
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"unable to hash vendor ID string\n");
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return (VENDORID_UNKNOWN);
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}
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/*
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* XXX THIS IS NOT QUITE RIGHT!
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*
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* But we need to be able to recognize
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* Windows 2000's ID, which is the MD5
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* has of a known string + 4 bytes of
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* what appears to be version info.
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*/
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if (vidhash->l <= vidlen &&
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memcmp(vidhash->v, gen + 1, vidhash->l) == 0) {
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plog(LLV_INFO, LOCATION, NULL,
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"received Vendor ID: %s\n",
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vendorid_strings[i]);
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vfree(vidhash);
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return (i);
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}
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vfree(vidhash);
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}
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plog(LLV_DEBUG, LOCATION, NULL, "received unknown Vendor ID\n");
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return (VENDORID_UNKNOWN);
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}
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