/* $NetBSD: vendorid.c,v 1.8 2009/09/01 12:22:09 tteras Exp $ */
/* Id: vendorid.c,v 1.10 2006/02/22 16:10:21 vanhu Exp */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* 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 project 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 PROJECT 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 PROJECT 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 "config.h"
#include <sys/types.h>
#include <sys/param.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include "var.h"
#include "misc.h"
#include "vmbuf.h"
#include "plog.h"
#include "debug.h"
#include "localconf.h"
#include "isakmp_var.h"
#include "isakmp.h"
#include "vendorid.h"
#include "crypto_openssl.h"
#include "handler.h"
#include "remoteconf.h"
#ifdef ENABLE_NATT
#include "nattraversal.h"
#endif
#ifdef ENABLE_HYBRID
#include <resolv.h>
#include "isakmp_xauth.h"
#include "isakmp_cfg.h"
#endif
static struct vendor_id all_vendor_ids[] = {
{ VENDORID_IPSEC_TOOLS, "IPSec-Tools" },
{ VENDORID_GSSAPI_LONG, "A GSS-API Authentication Method for IKE" },
{ VENDORID_GSSAPI , "GSSAPI" },
{ VENDORID_MS_NT5 , "MS NT5 ISAKMPOAKLEY" },
{ VENDORID_NATT_00 , "draft-ietf-ipsec-nat-t-ike-00" },
{ VENDORID_NATT_01 , "draft-ietf-ipsec-nat-t-ike-01" },
{ VENDORID_NATT_02 , "draft-ietf-ipsec-nat-t-ike-02" },
{ VENDORID_NATT_02_N , "draft-ietf-ipsec-nat-t-ike-02\n" },
{ VENDORID_NATT_03 , "draft-ietf-ipsec-nat-t-ike-03" },
{ VENDORID_NATT_04 , "draft-ietf-ipsec-nat-t-ike-04" },
{ VENDORID_NATT_05 , "draft-ietf-ipsec-nat-t-ike-05" },
{ VENDORID_NATT_06 , "draft-ietf-ipsec-nat-t-ike-06" },
{ VENDORID_NATT_07 , "draft-ietf-ipsec-nat-t-ike-07" },
{ VENDORID_NATT_08 , "draft-ietf-ipsec-nat-t-ike-08" },
{ VENDORID_NATT_RFC , "RFC 3947" },
{ VENDORID_XAUTH , "draft-ietf-ipsra-isakmp-xauth-06.txt" },
{ VENDORID_UNITY , "CISCO-UNITY" },
{ VENDORID_FRAG , "FRAGMENTATION" },
/* Just a readable string for DPD ... */
{ VENDORID_DPD , "DPD" },
/* Other known Vendor IDs */
{ VENDORID_KAME , "KAME/racoon" },
};
#define NUMVENDORIDS (sizeof(all_vendor_ids)/sizeof(all_vendor_ids[0]))
#define DPD_MAJOR_VERSION 0x01
#define DPD_MINOR_VERSION 0x00
const char vendorid_dpd_hash[] = {
0xAF, 0xCA, 0xD7, 0x13,
0x68, 0xA1, 0xF1, 0xC9,
0x6B, 0x86, 0x96, 0xFC,
0x77, 0x57, DPD_MAJOR_VERSION, DPD_MINOR_VERSION
};
static vchar_t *vendorid_fixup(int, vchar_t *t);
static struct vendor_id *
lookup_vendor_id_by_id (int id)
{
int i;
for (i = 0; i < NUMVENDORIDS; i++)
if (all_vendor_ids[i].id == id)
return &all_vendor_ids[i];
return NULL;
}
const char *
vid_string_by_id (int id)
{
struct vendor_id *current;
if (id == VENDORID_DPD)
return vendorid_dpd_hash;
current = lookup_vendor_id_by_id(id);
return current ? current->string : NULL;
}
static struct vendor_id *
lookup_vendor_id_by_hash (const char *hash)
{
int i;
unsigned char *h = (unsigned char *)hash;
for (i = 0; i < NUMVENDORIDS; i++)
if (strncmp(all_vendor_ids[i].hash->v, hash,
all_vendor_ids[i].hash->l) == 0)
return &all_vendor_ids[i];
return NULL;
}
void
compute_vendorids (void)
{
int i;
vchar_t vid;
for (i = 0; i < NUMVENDORIDS; i++) {
/* VENDORID_DPD is not a MD5 sum... */
if(all_vendor_ids[i].id == VENDORID_DPD){
all_vendor_ids[i].hash = vmalloc(sizeof(vendorid_dpd_hash));
if (all_vendor_ids[i].hash == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"unable to get memory for VID hash\n");
exit(1); /* this really shouldn't happen */
}
memcpy(all_vendor_ids[i].hash->v, vendorid_dpd_hash,
sizeof(vendorid_dpd_hash));
continue;
}
vid.v = (char *) all_vendor_ids[i].string;
vid.l = strlen(vid.v);
all_vendor_ids[i].hash = eay_md5_one(&vid);
if (all_vendor_ids[i].hash == NULL)
plog(LLV_ERROR, LOCATION, NULL,
"unable to hash vendor ID string\n");
/* Special cases */
all_vendor_ids[i].hash =
vendorid_fixup(all_vendor_ids[i].id,
all_vendor_ids[i].hash);
}
}
/*
* set hashed vendor id.
* hash function is always MD5.
*/
vchar_t *
set_vendorid(int vendorid)
{
struct vendor_id *current;
vchar_t vid, *new;
if (vendorid == VENDORID_UNKNOWN) {
/*
* The default unknown ID gets translated to
* KAME/racoon.
*/
vendorid = VENDORID_DEFAULT;
}
current = lookup_vendor_id_by_id(vendorid);
if (current == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"invalid vendor ID index: %d\n", vendorid);
return (NULL);
}
/* The rest of racoon expects a private copy
* of the VID that could be free'd after use.
* That's why we don't return the original pointer. */
return vdup(current->hash);
}
/*
* Check the vendor ID payload -- return the vendor ID index
* if we find a recognized one, or UNKNOWN if we don't.
*
* gen ... points to Vendor ID payload.
*/
static int
check_vendorid(struct isakmp_gen *gen)
{
vchar_t vid, *vidhash;
int i, vidlen;
struct vendor_id *current;
if (gen == NULL)
return (VENDORID_UNKNOWN);
vidlen = ntohs(gen->len) - sizeof(*gen);
current = lookup_vendor_id_by_hash((char *)(gen + 1));
if (!current)
goto unknown;
if (current->hash->l < vidlen)
plog(LLV_INFO, LOCATION, NULL,
"received broken Microsoft ID: %s\n",
current->string);
else
plog(LLV_INFO, LOCATION, NULL,
"received Vendor ID: %s\n",
current->string);
return current->id;
unknown:
plog(LLV_DEBUG, LOCATION, NULL, "received unknown Vendor ID\n");
plogdump(LLV_DEBUG, (char *)(gen + 1), vidlen);
return (VENDORID_UNKNOWN);
}
int
handle_vendorid(struct ph1handle *iph1, struct isakmp_gen *gen)
{
int vid_numeric;
vid_numeric = check_vendorid(gen);
if (vid_numeric == VENDORID_UNKNOWN)
return vid_numeric;
iph1->vendorid_mask |= BIT(vid_numeric);
#ifdef ENABLE_NATT
if (natt_vendorid(vid_numeric))
natt_handle_vendorid(iph1, vid_numeric);
#endif
#ifdef ENABLE_HYBRID
switch (vid_numeric) {
case VENDORID_XAUTH:
iph1->mode_cfg->flags |= ISAKMP_CFG_VENDORID_XAUTH;
break;
case VENDORID_UNITY:
iph1->mode_cfg->flags |= ISAKMP_CFG_VENDORID_UNITY;
break;
default:
break;
}
#endif
#ifdef ENABLE_DPD
if (vid_numeric == VENDORID_DPD &&
(iph1->rmconf == NULL || iph1->rmconf->dpd)) {
iph1->dpd_support = 1;
plog(LLV_DEBUG, LOCATION, NULL, "remote supports DPD\n");
}
#endif
return vid_numeric;
}
static vchar_t *
vendorid_fixup(vendorid, vidhash)
int vendorid;
vchar_t *vidhash;
{
switch(vendorid) {
case VENDORID_XAUTH: { /* The vendor Id is truncated */
vchar_t *tmp;
if ((tmp = vmalloc(8)) == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"unable to hash vendor ID string\n");
return NULL;
}
memcpy(tmp->v, vidhash->v, 8);
vfree(vidhash);
vidhash = tmp;
break;
}
case VENDORID_UNITY: /* Two bytes tweak */
vidhash->v[14] = 0x01;
vidhash->v[15] = 0x00;
break;
default:
break;
}
return vidhash;
}
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