1/* $KAME: vendorid.c,v 1.8 2001/03/27 02:39:57 thorpej Exp $ */ 2 3/* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#include <sys/types.h> 33#include <sys/param.h> 34 35#include <stdlib.h> 36#include <stdio.h> 37#include <string.h> 38#include <errno.h> 39#include <ctype.h> 40 41#include "var.h" 42#include "misc.h" 43#include "vmbuf.h" 44#include "plog.h" 45#include "debug.h" 46 47#include "localconf.h" 48#include "isakmp_var.h" 49#include "isakmp.h" 50#include "vendorid.h" 51#include "crypto_openssl.h" 52 53const char *vendorid_strings[] = VENDORID_STRINGS; 54 55/* 56 * set hashed vendor id. 57 * hash function is always MD5. 58 */ 59vchar_t * 60set_vendorid(int vendorid) 61{ 62 vchar_t vid, *vidhash; 63 64 if (vendorid == VENDORID_UNKNOWN) { 65 /* 66 * The default unknown ID gets translated to 67 * KAME/racoon. 68 */ 69 vendorid = VENDORID_KAME; 70 } 71 72 if (vendorid < 0 || vendorid >= NUMVENDORIDS) { 73 plog(LLV_ERROR, LOCATION, NULL, 74 "invalid vendor ID index: %d\n", vendorid); 75 return (NULL); 76 } 77 78 vid.v = (char *) vendorid_strings[vendorid]; 79 vid.l = strlen(vendorid_strings[vendorid]); 80 81 vidhash = eay_md5_one(&vid); 82 if (vidhash == NULL) 83 plog(LLV_ERROR, LOCATION, NULL, 84 "unable to hash vendor ID string\n"); 85 86 return vidhash; 87} 88 89/* 90 * Check the vendor ID payload -- return the vendor ID index 91 * if we find a recognized one, or UNKNOWN if we don't. 92 */ 93int 94check_vendorid(gen) 95 struct isakmp_gen *gen; /* points to Vendor ID payload */ 96{ 97 vchar_t vid, *vidhash; 98 int i, vidlen; 99 100 if (gen == NULL) 101 return (VENDORID_UNKNOWN); 102 103 vidlen = ntohs(gen->len) - sizeof(*gen); 104 105 for (i = 0; i < NUMVENDORIDS; i++) { 106 vid.v = (char *) vendorid_strings[i]; 107 vid.l = strlen(vendorid_strings[i]); 108 109 vidhash = eay_md5_one(&vid); 110 if (vidhash == NULL) { 111 plog(LLV_ERROR, LOCATION, NULL, 112 "unable to hash vendor ID string\n"); 113 return (VENDORID_UNKNOWN); 114 } 115 116 if (vidhash->l <= vidlen && 117 memcmp(vidhash->v, gen + 1, vidhash->l) == 0) { 118 plog(LLV_INFO, LOCATION, NULL, 119 "received Vendor ID: %s\n", 120 vendorid_strings[i]); 121 vfree(vidhash); 122 return (i); 123 } 124 vfree(vidhash); 125 } 126 127 plog(LLV_DEBUG, LOCATION, NULL, "received unknown Vendor ID\n"); 128 return (VENDORID_UNKNOWN); 129} 130