1 | #include <machine/rtems-bsd-user-space.h> |
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2 | #ifdef __rtems__ |
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3 | #include <machine/rtems-bsd-program.h> |
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4 | #include "rtems-bsd-racoon-namespace.h" |
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5 | #endif /* __rtems__ */ |
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6 | |
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7 | /* $NetBSD: vendorid.c,v 1.8 2009/09/01 12:22:09 tteras Exp $ */ |
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8 | |
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9 | /* Id: vendorid.c,v 1.10 2006/02/22 16:10:21 vanhu Exp */ |
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10 | |
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11 | /* |
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12 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
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13 | * All rights reserved. |
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14 | * |
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15 | * Redistribution and use in source and binary forms, with or without |
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16 | * modification, are permitted provided that the following conditions |
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17 | * are met: |
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18 | * 1. Redistributions of source code must retain the above copyright |
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19 | * notice, this list of conditions and the following disclaimer. |
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20 | * 2. Redistributions in binary form must reproduce the above copyright |
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21 | * notice, this list of conditions and the following disclaimer in the |
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22 | * documentation and/or other materials provided with the distribution. |
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23 | * 3. Neither the name of the project nor the names of its contributors |
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24 | * may be used to endorse or promote products derived from this software |
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25 | * without specific prior written permission. |
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26 | * |
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27 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
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28 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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29 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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30 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
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31 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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32 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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33 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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34 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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35 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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36 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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37 | * SUCH DAMAGE. |
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38 | */ |
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39 | |
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40 | #include "config.h" |
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41 | |
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42 | #include <sys/types.h> |
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43 | #include <sys/param.h> |
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44 | |
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45 | #include <stdlib.h> |
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46 | #include <stdio.h> |
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47 | #include <string.h> |
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48 | #include <errno.h> |
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49 | #include <ctype.h> |
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50 | |
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51 | #include "var.h" |
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52 | #include "misc.h" |
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53 | #include "vmbuf.h" |
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54 | #include "plog.h" |
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55 | #include "debug.h" |
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56 | |
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57 | #include "localconf.h" |
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58 | #include "isakmp_var.h" |
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59 | #include "isakmp.h" |
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60 | #include "vendorid.h" |
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61 | #include "crypto_openssl.h" |
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62 | #include "handler.h" |
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63 | #include "remoteconf.h" |
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64 | #ifdef ENABLE_NATT |
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65 | #include "nattraversal.h" |
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66 | #endif |
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67 | #ifdef ENABLE_HYBRID |
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68 | #include <resolv.h> |
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69 | #include "isakmp_xauth.h" |
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70 | #include "isakmp_cfg.h" |
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71 | #endif |
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72 | |
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73 | static struct vendor_id all_vendor_ids[] = { |
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74 | { VENDORID_IPSEC_TOOLS, "IPSec-Tools" }, |
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75 | { VENDORID_GSSAPI_LONG, "A GSS-API Authentication Method for IKE" }, |
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76 | { VENDORID_GSSAPI , "GSSAPI" }, |
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77 | { VENDORID_MS_NT5 , "MS NT5 ISAKMPOAKLEY" }, |
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78 | { VENDORID_NATT_00 , "draft-ietf-ipsec-nat-t-ike-00" }, |
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79 | { VENDORID_NATT_01 , "draft-ietf-ipsec-nat-t-ike-01" }, |
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80 | { VENDORID_NATT_02 , "draft-ietf-ipsec-nat-t-ike-02" }, |
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81 | { VENDORID_NATT_02_N , "draft-ietf-ipsec-nat-t-ike-02\n" }, |
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82 | { VENDORID_NATT_03 , "draft-ietf-ipsec-nat-t-ike-03" }, |
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83 | { VENDORID_NATT_04 , "draft-ietf-ipsec-nat-t-ike-04" }, |
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84 | { VENDORID_NATT_05 , "draft-ietf-ipsec-nat-t-ike-05" }, |
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85 | { VENDORID_NATT_06 , "draft-ietf-ipsec-nat-t-ike-06" }, |
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86 | { VENDORID_NATT_07 , "draft-ietf-ipsec-nat-t-ike-07" }, |
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87 | { VENDORID_NATT_08 , "draft-ietf-ipsec-nat-t-ike-08" }, |
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88 | { VENDORID_NATT_RFC , "RFC 3947" }, |
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89 | { VENDORID_XAUTH , "draft-ietf-ipsra-isakmp-xauth-06.txt" }, |
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90 | { VENDORID_UNITY , "CISCO-UNITY" }, |
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91 | { VENDORID_FRAG , "FRAGMENTATION" }, |
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92 | /* Just a readable string for DPD ... */ |
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93 | { VENDORID_DPD , "DPD" }, |
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94 | /* Other known Vendor IDs */ |
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95 | { VENDORID_KAME , "KAME/racoon" }, |
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96 | }; |
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97 | |
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98 | #define NUMVENDORIDS (sizeof(all_vendor_ids)/sizeof(all_vendor_ids[0])) |
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99 | |
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100 | #define DPD_MAJOR_VERSION 0x01 |
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101 | #define DPD_MINOR_VERSION 0x00 |
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102 | |
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103 | const char vendorid_dpd_hash[] = { |
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104 | 0xAF, 0xCA, 0xD7, 0x13, |
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105 | 0x68, 0xA1, 0xF1, 0xC9, |
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106 | 0x6B, 0x86, 0x96, 0xFC, |
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107 | 0x77, 0x57, DPD_MAJOR_VERSION, DPD_MINOR_VERSION |
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108 | }; |
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109 | |
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110 | |
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111 | static vchar_t *vendorid_fixup(int, vchar_t *t); |
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112 | |
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113 | static struct vendor_id * |
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114 | lookup_vendor_id_by_id (int id) |
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115 | { |
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116 | int i; |
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117 | |
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118 | for (i = 0; i < NUMVENDORIDS; i++) |
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119 | if (all_vendor_ids[i].id == id) |
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120 | return &all_vendor_ids[i]; |
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121 | |
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122 | return NULL; |
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123 | } |
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124 | |
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125 | const char * |
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126 | vid_string_by_id (int id) |
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127 | { |
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128 | struct vendor_id *current; |
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129 | |
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130 | if (id == VENDORID_DPD) |
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131 | return vendorid_dpd_hash; |
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132 | |
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133 | current = lookup_vendor_id_by_id(id); |
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134 | |
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135 | return current ? current->string : NULL; |
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136 | } |
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137 | |
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138 | static struct vendor_id * |
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139 | lookup_vendor_id_by_hash (const char *hash) |
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140 | { |
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141 | int i; |
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142 | unsigned char *h = (unsigned char *)hash; |
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143 | |
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144 | for (i = 0; i < NUMVENDORIDS; i++) |
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145 | if (strncmp(all_vendor_ids[i].hash->v, hash, |
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146 | all_vendor_ids[i].hash->l) == 0) |
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147 | return &all_vendor_ids[i]; |
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148 | |
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149 | return NULL; |
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150 | } |
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151 | |
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152 | void |
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153 | compute_vendorids (void) |
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154 | { |
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155 | int i; |
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156 | vchar_t vid; |
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157 | |
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158 | for (i = 0; i < NUMVENDORIDS; i++) { |
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159 | /* VENDORID_DPD is not a MD5 sum... */ |
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160 | if(all_vendor_ids[i].id == VENDORID_DPD){ |
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161 | all_vendor_ids[i].hash = vmalloc(sizeof(vendorid_dpd_hash)); |
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162 | if (all_vendor_ids[i].hash == NULL) { |
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163 | plog(LLV_ERROR, LOCATION, NULL, |
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164 | "unable to get memory for VID hash\n"); |
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165 | exit(1); /* this really shouldn't happen */ |
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166 | } |
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167 | memcpy(all_vendor_ids[i].hash->v, vendorid_dpd_hash, |
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168 | sizeof(vendorid_dpd_hash)); |
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169 | continue; |
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170 | } |
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171 | |
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172 | vid.v = (char *) all_vendor_ids[i].string; |
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173 | vid.l = strlen(vid.v); |
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174 | |
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175 | all_vendor_ids[i].hash = eay_md5_one(&vid); |
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176 | if (all_vendor_ids[i].hash == NULL) |
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177 | plog(LLV_ERROR, LOCATION, NULL, |
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178 | "unable to hash vendor ID string\n"); |
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179 | |
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180 | /* Special cases */ |
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181 | all_vendor_ids[i].hash = |
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182 | vendorid_fixup(all_vendor_ids[i].id, |
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183 | all_vendor_ids[i].hash); |
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184 | } |
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185 | } |
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186 | |
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187 | /* |
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188 | * set hashed vendor id. |
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189 | * hash function is always MD5. |
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190 | */ |
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191 | vchar_t * |
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192 | set_vendorid(int vendorid) |
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193 | { |
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194 | struct vendor_id *current; |
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195 | vchar_t vid, *new; |
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196 | |
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197 | if (vendorid == VENDORID_UNKNOWN) { |
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198 | /* |
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199 | * The default unknown ID gets translated to |
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200 | * KAME/racoon. |
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201 | */ |
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202 | vendorid = VENDORID_DEFAULT; |
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203 | } |
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204 | |
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205 | current = lookup_vendor_id_by_id(vendorid); |
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206 | if (current == NULL) { |
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207 | plog(LLV_ERROR, LOCATION, NULL, |
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208 | "invalid vendor ID index: %d\n", vendorid); |
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209 | return (NULL); |
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210 | } |
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211 | |
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212 | /* The rest of racoon expects a private copy |
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213 | * of the VID that could be free'd after use. |
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214 | * That's why we don't return the original pointer. */ |
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215 | return vdup(current->hash); |
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216 | } |
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217 | |
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218 | /* |
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219 | * Check the vendor ID payload -- return the vendor ID index |
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220 | * if we find a recognized one, or UNKNOWN if we don't. |
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221 | * |
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222 | * gen ... points to Vendor ID payload. |
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223 | */ |
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224 | static int |
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225 | check_vendorid(struct isakmp_gen *gen) |
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226 | { |
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227 | vchar_t vid, *vidhash; |
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228 | int i, vidlen; |
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229 | struct vendor_id *current; |
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230 | |
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231 | if (gen == NULL) |
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232 | return (VENDORID_UNKNOWN); |
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233 | |
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234 | vidlen = ntohs(gen->len) - sizeof(*gen); |
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235 | |
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236 | current = lookup_vendor_id_by_hash((char *)(gen + 1)); |
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237 | if (!current) |
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238 | goto unknown; |
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239 | |
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240 | if (current->hash->l < vidlen) |
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241 | plog(LLV_INFO, LOCATION, NULL, |
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242 | "received broken Microsoft ID: %s\n", |
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243 | current->string); |
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244 | else |
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245 | plog(LLV_INFO, LOCATION, NULL, |
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246 | "received Vendor ID: %s\n", |
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247 | current->string); |
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248 | |
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249 | return current->id; |
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250 | |
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251 | unknown: |
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252 | plog(LLV_DEBUG, LOCATION, NULL, "received unknown Vendor ID\n"); |
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253 | plogdump(LLV_DEBUG, (char *)(gen + 1), vidlen); |
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254 | return (VENDORID_UNKNOWN); |
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255 | } |
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256 | |
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257 | int |
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258 | handle_vendorid(struct ph1handle *iph1, struct isakmp_gen *gen) |
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259 | { |
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260 | int vid_numeric; |
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261 | |
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262 | vid_numeric = check_vendorid(gen); |
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263 | if (vid_numeric == VENDORID_UNKNOWN) |
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264 | return vid_numeric; |
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265 | |
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266 | iph1->vendorid_mask |= BIT(vid_numeric); |
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267 | |
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268 | #ifdef ENABLE_NATT |
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269 | if (natt_vendorid(vid_numeric)) |
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270 | natt_handle_vendorid(iph1, vid_numeric); |
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271 | #endif |
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272 | #ifdef ENABLE_HYBRID |
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273 | switch (vid_numeric) { |
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274 | case VENDORID_XAUTH: |
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275 | iph1->mode_cfg->flags |= ISAKMP_CFG_VENDORID_XAUTH; |
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276 | break; |
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277 | case VENDORID_UNITY: |
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278 | iph1->mode_cfg->flags |= ISAKMP_CFG_VENDORID_UNITY; |
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279 | break; |
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280 | default: |
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281 | break; |
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282 | } |
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283 | #endif |
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284 | #ifdef ENABLE_DPD |
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285 | if (vid_numeric == VENDORID_DPD && |
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286 | (iph1->rmconf == NULL || iph1->rmconf->dpd)) { |
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287 | iph1->dpd_support = 1; |
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288 | plog(LLV_DEBUG, LOCATION, NULL, "remote supports DPD\n"); |
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289 | } |
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290 | #endif |
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291 | |
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292 | return vid_numeric; |
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293 | } |
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294 | |
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295 | static vchar_t * |
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296 | vendorid_fixup(vendorid, vidhash) |
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297 | int vendorid; |
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298 | vchar_t *vidhash; |
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299 | { |
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300 | switch(vendorid) { |
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301 | case VENDORID_XAUTH: { /* The vendor Id is truncated */ |
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302 | vchar_t *tmp; |
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303 | |
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304 | if ((tmp = vmalloc(8)) == NULL) { |
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305 | plog(LLV_ERROR, LOCATION, NULL, |
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306 | "unable to hash vendor ID string\n"); |
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307 | return NULL; |
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308 | } |
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309 | |
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310 | memcpy(tmp->v, vidhash->v, 8); |
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311 | vfree(vidhash); |
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312 | vidhash = tmp; |
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313 | |
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314 | break; |
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315 | } |
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316 | case VENDORID_UNITY: /* Two bytes tweak */ |
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317 | vidhash->v[14] = 0x01; |
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318 | vidhash->v[15] = 0x00; |
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319 | break; |
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320 | |
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321 | default: |
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322 | break; |
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323 | } |
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324 | |
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325 | return vidhash; |
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326 | } |
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327 | #ifdef __rtems__ |
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328 | #include "rtems-bsd-racoon-vendorid-data.h" |
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329 | #endif /* __rtems__ */ |
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