1 | /* $NetBSD: oakley.c,v 1.22.2.2 2012/08/29 11:35:09 tteras Exp $ */ |
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2 | |
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3 | /* Id: oakley.c,v 1.32 2006/05/26 12:19:46 manubsd Exp */ |
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4 | |
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5 | /* |
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6 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
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7 | * All rights reserved. |
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8 | * |
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9 | * Redistribution and use in source and binary forms, with or without |
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10 | * modification, are permitted provided that the following conditions |
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11 | * are met: |
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12 | * 1. Redistributions of source code must retain the above copyright |
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13 | * notice, this list of conditions and the following disclaimer. |
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14 | * 2. Redistributions in binary form must reproduce the above copyright |
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15 | * notice, this list of conditions and the following disclaimer in the |
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16 | * documentation and/or other materials provided with the distribution. |
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17 | * 3. Neither the name of the project nor the names of its contributors |
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18 | * may be used to endorse or promote products derived from this software |
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19 | * without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
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22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
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25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 | * SUCH DAMAGE. |
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32 | */ |
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33 | |
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34 | #include "config.h" |
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35 | |
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36 | #include <sys/types.h> |
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37 | #include <sys/param.h> |
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38 | #include <sys/socket.h> /* XXX for subjectaltname */ |
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39 | #include <netinet/in.h> /* XXX for subjectaltname */ |
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40 | |
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41 | #include <openssl/pkcs7.h> |
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42 | #include <openssl/x509.h> |
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43 | |
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44 | #include <stdlib.h> |
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45 | #include <stdio.h> |
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46 | #include <string.h> |
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47 | #include <errno.h> |
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48 | |
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49 | #if TIME_WITH_SYS_TIME |
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50 | # include <sys/time.h> |
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51 | # include <time.h> |
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52 | #else |
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53 | # if HAVE_SYS_TIME_H |
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54 | # include <sys/time.h> |
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55 | # else |
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56 | # include <time.h> |
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57 | # endif |
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58 | #endif |
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59 | #ifdef ENABLE_HYBRID |
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60 | #include <resolv.h> |
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61 | #endif |
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62 | |
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63 | #include "var.h" |
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64 | #include "misc.h" |
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65 | #include "vmbuf.h" |
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66 | #include "str2val.h" |
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67 | #include "plog.h" |
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68 | #include "debug.h" |
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69 | |
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70 | #include "isakmp_var.h" |
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71 | #include "isakmp.h" |
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72 | #ifdef ENABLE_HYBRID |
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73 | #include "isakmp_xauth.h" |
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74 | #include "isakmp_cfg.h" |
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75 | #endif |
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76 | #include "oakley.h" |
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77 | #include "admin.h" |
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78 | #include "privsep.h" |
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79 | #include "localconf.h" |
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80 | #include "remoteconf.h" |
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81 | #include "policy.h" |
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82 | #include "handler.h" |
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83 | #include "ipsec_doi.h" |
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84 | #include "algorithm.h" |
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85 | #include "dhgroup.h" |
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86 | #include "sainfo.h" |
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87 | #include "proposal.h" |
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88 | #include "crypto_openssl.h" |
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89 | #include "dnssec.h" |
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90 | #include "sockmisc.h" |
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91 | #include "strnames.h" |
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92 | #include "gcmalloc.h" |
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93 | #include "rsalist.h" |
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94 | |
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95 | #ifdef HAVE_GSSAPI |
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96 | #include "gssapi.h" |
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97 | #endif |
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98 | |
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99 | #define OUTBOUND_SA 0 |
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100 | #define INBOUND_SA 1 |
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101 | |
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102 | #define INITDHVAL(a, s, d, t) \ |
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103 | do { \ |
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104 | vchar_t buf; \ |
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105 | buf.v = str2val((s), 16, &buf.l); \ |
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106 | memset(&a, 0, sizeof(struct dhgroup)); \ |
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107 | a.type = (t); \ |
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108 | a.prime = vdup(&buf); \ |
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109 | a.gen1 = 2; \ |
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110 | a.gen2 = 0; \ |
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111 | racoon_free(buf.v); \ |
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112 | } while(0); |
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113 | |
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114 | struct dhgroup dh_modp768; |
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115 | struct dhgroup dh_modp1024; |
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116 | struct dhgroup dh_modp1536; |
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117 | struct dhgroup dh_modp2048; |
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118 | struct dhgroup dh_modp3072; |
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119 | struct dhgroup dh_modp4096; |
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120 | struct dhgroup dh_modp6144; |
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121 | struct dhgroup dh_modp8192; |
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122 | |
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123 | |
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124 | static int oakley_check_dh_pub __P((vchar_t *, vchar_t **)); |
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125 | static int oakley_compute_keymat_x __P((struct ph2handle *, int, int)); |
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126 | static int oakley_check_certid __P((struct ph1handle *iph1)); |
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127 | static int check_typeofcertname __P((int, int)); |
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128 | static int oakley_padlen __P((int, int)); |
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129 | static int get_plainrsa_fromlocal __P((struct ph1handle *, int)); |
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130 | |
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131 | int oakley_get_certtype(cert) |
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132 | vchar_t *cert; |
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133 | { |
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134 | if (cert == NULL) |
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135 | return ISAKMP_CERT_NONE; |
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136 | |
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137 | return cert->v[0]; |
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138 | } |
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139 | |
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140 | static vchar_t * |
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141 | dump_isakmp_payload(gen) |
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142 | struct isakmp_gen *gen; |
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143 | { |
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144 | vchar_t p; |
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145 | |
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146 | if (ntohs(gen->len) <= sizeof(*gen)) { |
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147 | plog(LLV_ERROR, LOCATION, NULL, |
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148 | "Len is too small !!.\n"); |
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149 | return NULL; |
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150 | } |
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151 | |
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152 | p.v = (caddr_t) (gen + 1); |
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153 | p.l = ntohs(gen->len) - sizeof(*gen); |
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154 | |
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155 | return vdup(&p); |
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156 | } |
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157 | |
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158 | static vchar_t * |
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159 | dump_x509(cert) |
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160 | X509 *cert; |
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161 | { |
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162 | vchar_t *pl; |
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163 | u_char *bp; |
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164 | int len; |
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165 | |
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166 | len = i2d_X509(cert, NULL); |
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167 | |
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168 | pl = vmalloc(len + 1); |
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169 | if (pl == NULL) { |
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170 | plog(LLV_ERROR, LOCATION, NULL, |
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171 | "Failed to copy CERT from packet.\n"); |
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172 | return NULL; |
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173 | } |
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174 | |
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175 | pl->v[0] = ISAKMP_CERT_X509SIGN; |
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176 | bp = (u_char *) &pl->v[1]; |
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177 | i2d_X509(cert, &bp); |
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178 | |
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179 | return pl; |
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180 | } |
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181 | |
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182 | |
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183 | |
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184 | int |
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185 | oakley_get_defaultlifetime() |
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186 | { |
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187 | return OAKLEY_ATTR_SA_LD_SEC_DEFAULT; |
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188 | } |
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189 | |
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190 | int |
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191 | oakley_dhinit() |
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192 | { |
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193 | /* set DH MODP */ |
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194 | INITDHVAL(dh_modp768, OAKLEY_PRIME_MODP768, |
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195 | OAKLEY_ATTR_GRP_DESC_MODP768, OAKLEY_ATTR_GRP_TYPE_MODP); |
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196 | INITDHVAL(dh_modp1024, OAKLEY_PRIME_MODP1024, |
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197 | OAKLEY_ATTR_GRP_DESC_MODP1024, OAKLEY_ATTR_GRP_TYPE_MODP); |
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198 | INITDHVAL(dh_modp1536, OAKLEY_PRIME_MODP1536, |
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199 | OAKLEY_ATTR_GRP_DESC_MODP1536, OAKLEY_ATTR_GRP_TYPE_MODP); |
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200 | INITDHVAL(dh_modp2048, OAKLEY_PRIME_MODP2048, |
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201 | OAKLEY_ATTR_GRP_DESC_MODP2048, OAKLEY_ATTR_GRP_TYPE_MODP); |
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202 | INITDHVAL(dh_modp3072, OAKLEY_PRIME_MODP3072, |
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203 | OAKLEY_ATTR_GRP_DESC_MODP3072, OAKLEY_ATTR_GRP_TYPE_MODP); |
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204 | INITDHVAL(dh_modp4096, OAKLEY_PRIME_MODP4096, |
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205 | OAKLEY_ATTR_GRP_DESC_MODP4096, OAKLEY_ATTR_GRP_TYPE_MODP); |
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206 | INITDHVAL(dh_modp6144, OAKLEY_PRIME_MODP6144, |
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207 | OAKLEY_ATTR_GRP_DESC_MODP6144, OAKLEY_ATTR_GRP_TYPE_MODP); |
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208 | INITDHVAL(dh_modp8192, OAKLEY_PRIME_MODP8192, |
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209 | OAKLEY_ATTR_GRP_DESC_MODP8192, OAKLEY_ATTR_GRP_TYPE_MODP); |
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210 | |
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211 | return 0; |
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212 | } |
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213 | |
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214 | void |
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215 | oakley_dhgrp_free(dhgrp) |
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216 | struct dhgroup *dhgrp; |
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217 | { |
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218 | if (dhgrp->prime) |
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219 | vfree(dhgrp->prime); |
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220 | if (dhgrp->curve_a) |
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221 | vfree(dhgrp->curve_a); |
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222 | if (dhgrp->curve_b) |
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223 | vfree(dhgrp->curve_b); |
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224 | if (dhgrp->order) |
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225 | vfree(dhgrp->order); |
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226 | racoon_free(dhgrp); |
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227 | } |
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228 | |
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229 | /* |
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230 | * RFC2409 5 |
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231 | * The length of the Diffie-Hellman public value MUST be equal to the |
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232 | * length of the prime modulus over which the exponentiation was |
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233 | * performed, prepending zero bits to the value if necessary. |
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234 | */ |
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235 | static int |
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236 | oakley_check_dh_pub(prime, pub0) |
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237 | vchar_t *prime, **pub0; |
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238 | { |
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239 | vchar_t *tmp; |
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240 | vchar_t *pub = *pub0; |
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241 | |
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242 | if (prime->l == pub->l) |
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243 | return 0; |
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244 | |
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245 | if (prime->l < pub->l) { |
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246 | /* what should i do ? */ |
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247 | plog(LLV_ERROR, LOCATION, NULL, |
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248 | "invalid public information was generated.\n"); |
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249 | return -1; |
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250 | } |
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251 | |
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252 | /* prime->l > pub->l */ |
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253 | tmp = vmalloc(prime->l); |
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254 | if (tmp == NULL) { |
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255 | plog(LLV_ERROR, LOCATION, NULL, |
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256 | "failed to get DH buffer.\n"); |
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257 | return -1; |
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258 | } |
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259 | memcpy(tmp->v + prime->l - pub->l, pub->v, pub->l); |
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260 | |
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261 | vfree(*pub0); |
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262 | *pub0 = tmp; |
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263 | |
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264 | return 0; |
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265 | } |
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266 | |
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267 | /* |
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268 | * compute sharing secret of DH |
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269 | * IN: *dh, *pub, *priv, *pub_p |
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270 | * OUT: **gxy |
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271 | */ |
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272 | int |
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273 | oakley_dh_compute(dh, pub, priv, pub_p, gxy) |
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274 | const struct dhgroup *dh; |
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275 | vchar_t *pub, *priv, *pub_p, **gxy; |
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276 | { |
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277 | #ifdef ENABLE_STATS |
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278 | struct timeval start, end; |
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279 | #endif |
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280 | if ((*gxy = vmalloc(dh->prime->l)) == NULL) { |
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281 | plog(LLV_ERROR, LOCATION, NULL, |
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282 | "failed to get DH buffer.\n"); |
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283 | return -1; |
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284 | } |
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285 | |
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286 | #ifdef ENABLE_STATS |
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287 | gettimeofday(&start, NULL); |
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288 | #endif |
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289 | switch (dh->type) { |
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290 | case OAKLEY_ATTR_GRP_TYPE_MODP: |
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291 | if (eay_dh_compute(dh->prime, dh->gen1, pub, priv, pub_p, gxy) < 0) { |
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292 | plog(LLV_ERROR, LOCATION, NULL, |
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293 | "failed to compute dh value.\n"); |
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294 | return -1; |
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295 | } |
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296 | break; |
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297 | case OAKLEY_ATTR_GRP_TYPE_ECP: |
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298 | case OAKLEY_ATTR_GRP_TYPE_EC2N: |
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299 | plog(LLV_ERROR, LOCATION, NULL, |
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300 | "dh type %d isn't supported.\n", dh->type); |
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301 | return -1; |
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302 | default: |
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303 | plog(LLV_ERROR, LOCATION, NULL, |
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304 | "invalid dh type %d.\n", dh->type); |
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305 | return -1; |
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306 | } |
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307 | |
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308 | #ifdef ENABLE_STATS |
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309 | gettimeofday(&end, NULL); |
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310 | syslog(LOG_NOTICE, "%s(%s%zu): %8.6f", __func__, |
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311 | s_attr_isakmp_group(dh->type), dh->prime->l << 3, |
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312 | timedelta(&start, &end)); |
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313 | #endif |
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314 | |
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315 | plog(LLV_DEBUG, LOCATION, NULL, "compute DH's shared.\n"); |
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316 | plogdump(LLV_DEBUG, (*gxy)->v, (*gxy)->l); |
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317 | |
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318 | return 0; |
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319 | } |
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320 | |
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321 | /* |
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322 | * generate values of DH |
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323 | * IN: *dh |
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324 | * OUT: **pub, **priv |
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325 | */ |
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326 | int |
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327 | oakley_dh_generate(dh, pub, priv) |
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328 | const struct dhgroup *dh; |
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329 | vchar_t **pub, **priv; |
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330 | { |
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331 | #ifdef ENABLE_STATS |
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332 | struct timeval start, end; |
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333 | gettimeofday(&start, NULL); |
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334 | #endif |
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335 | switch (dh->type) { |
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336 | case OAKLEY_ATTR_GRP_TYPE_MODP: |
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337 | if (eay_dh_generate(dh->prime, dh->gen1, dh->gen2, pub, priv) < 0) { |
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338 | plog(LLV_ERROR, LOCATION, NULL, |
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339 | "failed to compute dh value.\n"); |
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340 | return -1; |
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341 | } |
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342 | break; |
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343 | |
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344 | case OAKLEY_ATTR_GRP_TYPE_ECP: |
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345 | case OAKLEY_ATTR_GRP_TYPE_EC2N: |
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346 | plog(LLV_ERROR, LOCATION, NULL, |
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347 | "dh type %d isn't supported.\n", dh->type); |
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348 | return -1; |
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349 | default: |
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350 | plog(LLV_ERROR, LOCATION, NULL, |
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351 | "invalid dh type %d.\n", dh->type); |
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352 | return -1; |
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353 | } |
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354 | |
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355 | #ifdef ENABLE_STATS |
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356 | gettimeofday(&end, NULL); |
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357 | syslog(LOG_NOTICE, "%s(%s%zu): %8.6f", __func__, |
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358 | s_attr_isakmp_group(dh->type), dh->prime->l << 3, |
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359 | timedelta(&start, &end)); |
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360 | #endif |
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361 | |
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362 | if (oakley_check_dh_pub(dh->prime, pub) != 0) |
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363 | return -1; |
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364 | |
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365 | plog(LLV_DEBUG, LOCATION, NULL, "compute DH's private.\n"); |
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366 | plogdump(LLV_DEBUG, (*priv)->v, (*priv)->l); |
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367 | plog(LLV_DEBUG, LOCATION, NULL, "compute DH's public.\n"); |
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368 | plogdump(LLV_DEBUG, (*pub)->v, (*pub)->l); |
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369 | |
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370 | return 0; |
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371 | } |
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372 | |
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373 | /* |
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374 | * copy pre-defined dhgroup values. |
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375 | */ |
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376 | int |
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377 | oakley_setdhgroup(group, dhgrp) |
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378 | int group; |
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379 | struct dhgroup **dhgrp; |
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380 | { |
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381 | struct dhgroup *g; |
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382 | |
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383 | *dhgrp = NULL; /* just make sure, initialize */ |
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384 | |
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385 | g = alg_oakley_dhdef_group(group); |
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386 | if (g == NULL) { |
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387 | plog(LLV_ERROR, LOCATION, NULL, |
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388 | "invalid DH parameter grp=%d.\n", group); |
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389 | return -1; |
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390 | } |
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391 | |
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392 | if (!g->type || !g->prime || !g->gen1) { |
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393 | /* unsuported */ |
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394 | plog(LLV_ERROR, LOCATION, NULL, |
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395 | "unsupported DH parameters grp=%d.\n", group); |
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396 | return -1; |
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397 | } |
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398 | |
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399 | *dhgrp = racoon_calloc(1, sizeof(struct dhgroup)); |
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400 | if (*dhgrp == NULL) { |
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401 | plog(LLV_ERROR, LOCATION, NULL, |
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402 | "failed to get DH buffer.\n"); |
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403 | return 0; |
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404 | } |
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405 | |
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406 | /* set defined dh vlaues */ |
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407 | memcpy(*dhgrp, g, sizeof(*g)); |
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408 | (*dhgrp)->prime = vdup(g->prime); |
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409 | |
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410 | return 0; |
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411 | } |
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412 | |
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413 | /* |
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414 | * PRF |
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415 | * |
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416 | * NOTE: we do not support prf with different input/output bitwidth, |
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417 | * so we do not implement RFC2409 Appendix B (DOORAK-MAC example) in |
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418 | * oakley_compute_keymat(). If you add support for such prf function, |
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419 | * modify oakley_compute_keymat() accordingly. |
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420 | */ |
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421 | vchar_t * |
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422 | oakley_prf(key, buf, iph1) |
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423 | vchar_t *key, *buf; |
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424 | struct ph1handle *iph1; |
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425 | { |
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426 | vchar_t *res = NULL; |
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427 | int type; |
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428 | |
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429 | if (iph1->approval == NULL) { |
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430 | /* |
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431 | * it's before negotiating hash algorithm. |
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432 | * We use md5 as default. |
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433 | */ |
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434 | type = OAKLEY_ATTR_HASH_ALG_MD5; |
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435 | } else |
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436 | type = iph1->approval->hashtype; |
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437 | |
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438 | res = alg_oakley_hmacdef_one(type, key, buf); |
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439 | if (res == NULL) { |
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440 | plog(LLV_ERROR, LOCATION, NULL, |
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441 | "invalid hmac algorithm %d.\n", type); |
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442 | return NULL; |
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443 | } |
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444 | |
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445 | return res; |
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446 | } |
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447 | |
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448 | /* |
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449 | * hash |
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450 | */ |
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451 | vchar_t * |
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452 | oakley_hash(buf, iph1) |
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453 | vchar_t *buf; |
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454 | struct ph1handle *iph1; |
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455 | { |
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456 | vchar_t *res = NULL; |
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457 | int type; |
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458 | |
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459 | if (iph1->approval == NULL) { |
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460 | /* |
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461 | * it's before negotiating hash algorithm. |
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462 | * We use md5 as default. |
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463 | */ |
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464 | type = OAKLEY_ATTR_HASH_ALG_MD5; |
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465 | } else |
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466 | type = iph1->approval->hashtype; |
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467 | |
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468 | res = alg_oakley_hashdef_one(type, buf); |
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469 | if (res == NULL) { |
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470 | plog(LLV_ERROR, LOCATION, NULL, |
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471 | "invalid hash algorithm %d.\n", type); |
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472 | return NULL; |
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473 | } |
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474 | |
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475 | return res; |
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476 | } |
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477 | |
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478 | /* |
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479 | * compute KEYMAT |
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480 | * see seciton 5.5 Phase 2 - Quick Mode in isakmp-oakley-05. |
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481 | */ |
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482 | int |
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483 | oakley_compute_keymat(iph2, side) |
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484 | struct ph2handle *iph2; |
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485 | int side; |
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486 | { |
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487 | int error = -1; |
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488 | |
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489 | /* compute sharing secret of DH when PFS */ |
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490 | if (iph2->approval->pfs_group && iph2->dhpub_p) { |
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491 | if (oakley_dh_compute(iph2->pfsgrp, iph2->dhpub, |
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492 | iph2->dhpriv, iph2->dhpub_p, &iph2->dhgxy) < 0) |
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493 | goto end; |
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494 | } |
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495 | |
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496 | /* compute keymat */ |
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497 | if (oakley_compute_keymat_x(iph2, side, INBOUND_SA) < 0 |
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498 | || oakley_compute_keymat_x(iph2, side, OUTBOUND_SA) < 0) |
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499 | goto end; |
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500 | |
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501 | plog(LLV_DEBUG, LOCATION, NULL, "KEYMAT computed.\n"); |
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502 | |
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503 | error = 0; |
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504 | |
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505 | end: |
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506 | return error; |
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507 | } |
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508 | |
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509 | /* |
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510 | * compute KEYMAT. |
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511 | * KEYMAT = prf(SKEYID_d, protocol | SPI | Ni_b | Nr_b). |
---|
512 | * If PFS is desired and KE payloads were exchanged, |
---|
513 | * KEYMAT = prf(SKEYID_d, g(qm)^xy | protocol | SPI | Ni_b | Nr_b) |
---|
514 | * |
---|
515 | * NOTE: we do not support prf with different input/output bitwidth, |
---|
516 | * so we do not implement RFC2409 Appendix B (DOORAK-MAC example). |
---|
517 | */ |
---|
518 | static int |
---|
519 | oakley_compute_keymat_x(iph2, side, sa_dir) |
---|
520 | struct ph2handle *iph2; |
---|
521 | int side; |
---|
522 | int sa_dir; |
---|
523 | { |
---|
524 | vchar_t *buf = NULL, *res = NULL, *bp; |
---|
525 | char *p; |
---|
526 | int len; |
---|
527 | int error = -1; |
---|
528 | int pfs = 0; |
---|
529 | int dupkeymat; /* generate K[1-dupkeymat] */ |
---|
530 | struct saproto *pr; |
---|
531 | struct satrns *tr; |
---|
532 | int encklen, authklen, l; |
---|
533 | |
---|
534 | pfs = ((iph2->approval->pfs_group && iph2->dhgxy) ? 1 : 0); |
---|
535 | |
---|
536 | len = pfs ? iph2->dhgxy->l : 0; |
---|
537 | len += (1 |
---|
538 | + sizeof(u_int32_t) /* XXX SPI size */ |
---|
539 | + iph2->nonce->l |
---|
540 | + iph2->nonce_p->l); |
---|
541 | buf = vmalloc(len); |
---|
542 | if (buf == NULL) { |
---|
543 | plog(LLV_ERROR, LOCATION, NULL, |
---|
544 | "failed to get keymat buffer.\n"); |
---|
545 | goto end; |
---|
546 | } |
---|
547 | |
---|
548 | for (pr = iph2->approval->head; pr != NULL; pr = pr->next) { |
---|
549 | p = buf->v; |
---|
550 | |
---|
551 | /* if PFS */ |
---|
552 | if (pfs) { |
---|
553 | memcpy(p, iph2->dhgxy->v, iph2->dhgxy->l); |
---|
554 | p += iph2->dhgxy->l; |
---|
555 | } |
---|
556 | |
---|
557 | p[0] = pr->proto_id; |
---|
558 | p += 1; |
---|
559 | |
---|
560 | memcpy(p, (sa_dir == INBOUND_SA ? &pr->spi : &pr->spi_p), |
---|
561 | sizeof(pr->spi)); |
---|
562 | p += sizeof(pr->spi); |
---|
563 | |
---|
564 | bp = (side == INITIATOR ? iph2->nonce : iph2->nonce_p); |
---|
565 | memcpy(p, bp->v, bp->l); |
---|
566 | p += bp->l; |
---|
567 | |
---|
568 | bp = (side == INITIATOR ? iph2->nonce_p : iph2->nonce); |
---|
569 | memcpy(p, bp->v, bp->l); |
---|
570 | p += bp->l; |
---|
571 | |
---|
572 | /* compute IV */ |
---|
573 | plog(LLV_DEBUG, LOCATION, NULL, "KEYMAT compute with\n"); |
---|
574 | plogdump(LLV_DEBUG, buf->v, buf->l); |
---|
575 | |
---|
576 | /* res = K1 */ |
---|
577 | res = oakley_prf(iph2->ph1->skeyid_d, buf, iph2->ph1); |
---|
578 | if (res == NULL) |
---|
579 | goto end; |
---|
580 | |
---|
581 | /* compute key length needed */ |
---|
582 | encklen = authklen = 0; |
---|
583 | switch (pr->proto_id) { |
---|
584 | case IPSECDOI_PROTO_IPSEC_ESP: |
---|
585 | for (tr = pr->head; tr; tr = tr->next) { |
---|
586 | l = alg_ipsec_encdef_keylen(tr->trns_id, |
---|
587 | tr->encklen); |
---|
588 | if (l > encklen) |
---|
589 | encklen = l; |
---|
590 | |
---|
591 | l = alg_ipsec_hmacdef_hashlen(tr->authtype); |
---|
592 | if (l > authklen) |
---|
593 | authklen = l; |
---|
594 | } |
---|
595 | break; |
---|
596 | case IPSECDOI_PROTO_IPSEC_AH: |
---|
597 | for (tr = pr->head; tr; tr = tr->next) { |
---|
598 | l = alg_ipsec_hmacdef_hashlen(tr->trns_id); |
---|
599 | if (l > authklen) |
---|
600 | authklen = l; |
---|
601 | } |
---|
602 | break; |
---|
603 | default: |
---|
604 | break; |
---|
605 | } |
---|
606 | plog(LLV_DEBUG, LOCATION, NULL, "encklen=%d authklen=%d\n", |
---|
607 | encklen, authklen); |
---|
608 | |
---|
609 | dupkeymat = (encklen + authklen) / 8 / res->l; |
---|
610 | dupkeymat += 2; /* safety mergin */ |
---|
611 | if (dupkeymat < 3) |
---|
612 | dupkeymat = 3; |
---|
613 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
614 | "generating %zu bits of key (dupkeymat=%d)\n", |
---|
615 | dupkeymat * 8 * res->l, dupkeymat); |
---|
616 | if (0 < --dupkeymat) { |
---|
617 | vchar_t *prev = res; /* K(n-1) */ |
---|
618 | vchar_t *seed = NULL; /* seed for Kn */ |
---|
619 | size_t l; |
---|
620 | |
---|
621 | /* |
---|
622 | * generating long key (isakmp-oakley-08 5.5) |
---|
623 | * KEYMAT = K1 | K2 | K3 | ... |
---|
624 | * where |
---|
625 | * src = [ g(qm)^xy | ] protocol | SPI | Ni_b | Nr_b |
---|
626 | * K1 = prf(SKEYID_d, src) |
---|
627 | * K2 = prf(SKEYID_d, K1 | src) |
---|
628 | * K3 = prf(SKEYID_d, K2 | src) |
---|
629 | * Kn = prf(SKEYID_d, K(n-1) | src) |
---|
630 | */ |
---|
631 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
632 | "generating K1...K%d for KEYMAT.\n", |
---|
633 | dupkeymat + 1); |
---|
634 | |
---|
635 | seed = vmalloc(prev->l + buf->l); |
---|
636 | if (seed == NULL) { |
---|
637 | plog(LLV_ERROR, LOCATION, NULL, |
---|
638 | "failed to get keymat buffer.\n"); |
---|
639 | if (prev && prev != res) |
---|
640 | vfree(prev); |
---|
641 | goto end; |
---|
642 | } |
---|
643 | |
---|
644 | while (dupkeymat--) { |
---|
645 | vchar_t *this = NULL; /* Kn */ |
---|
646 | int update_prev; |
---|
647 | |
---|
648 | memcpy(seed->v, prev->v, prev->l); |
---|
649 | memcpy(seed->v + prev->l, buf->v, buf->l); |
---|
650 | this = oakley_prf(iph2->ph1->skeyid_d, seed, |
---|
651 | iph2->ph1); |
---|
652 | if (!this) { |
---|
653 | plog(LLV_ERROR, LOCATION, NULL, |
---|
654 | "oakley_prf memory overflow\n"); |
---|
655 | if (prev && prev != res) |
---|
656 | vfree(prev); |
---|
657 | vfree(this); |
---|
658 | vfree(seed); |
---|
659 | goto end; |
---|
660 | } |
---|
661 | |
---|
662 | update_prev = (prev && prev == res) ? 1 : 0; |
---|
663 | |
---|
664 | l = res->l; |
---|
665 | res = vrealloc(res, l + this->l); |
---|
666 | |
---|
667 | if (update_prev) |
---|
668 | prev = res; |
---|
669 | |
---|
670 | if (res == NULL) { |
---|
671 | plog(LLV_ERROR, LOCATION, NULL, |
---|
672 | "failed to get keymat buffer.\n"); |
---|
673 | if (prev && prev != res) |
---|
674 | vfree(prev); |
---|
675 | vfree(this); |
---|
676 | vfree(seed); |
---|
677 | goto end; |
---|
678 | } |
---|
679 | memcpy(res->v + l, this->v, this->l); |
---|
680 | |
---|
681 | if (prev && prev != res) |
---|
682 | vfree(prev); |
---|
683 | prev = this; |
---|
684 | this = NULL; |
---|
685 | } |
---|
686 | |
---|
687 | if (prev && prev != res) |
---|
688 | vfree(prev); |
---|
689 | vfree(seed); |
---|
690 | } |
---|
691 | |
---|
692 | plogdump(LLV_DEBUG, res->v, res->l); |
---|
693 | |
---|
694 | if (sa_dir == INBOUND_SA) |
---|
695 | pr->keymat = res; |
---|
696 | else |
---|
697 | pr->keymat_p = res; |
---|
698 | res = NULL; |
---|
699 | } |
---|
700 | |
---|
701 | error = 0; |
---|
702 | |
---|
703 | end: |
---|
704 | if (error) { |
---|
705 | for (pr = iph2->approval->head; pr != NULL; pr = pr->next) { |
---|
706 | if (pr->keymat) { |
---|
707 | vfree(pr->keymat); |
---|
708 | pr->keymat = NULL; |
---|
709 | } |
---|
710 | if (pr->keymat_p) { |
---|
711 | vfree(pr->keymat_p); |
---|
712 | pr->keymat_p = NULL; |
---|
713 | } |
---|
714 | } |
---|
715 | } |
---|
716 | |
---|
717 | if (buf != NULL) |
---|
718 | vfree(buf); |
---|
719 | if (res) |
---|
720 | vfree(res); |
---|
721 | |
---|
722 | return error; |
---|
723 | } |
---|
724 | |
---|
725 | #if notyet |
---|
726 | /* |
---|
727 | * NOTE: Must terminate by NULL. |
---|
728 | */ |
---|
729 | vchar_t * |
---|
730 | oakley_compute_hashx(struct ph1handle *iph1, ...) |
---|
731 | { |
---|
732 | vchar_t *buf, *res; |
---|
733 | vchar_t *s; |
---|
734 | caddr_t p; |
---|
735 | int len; |
---|
736 | |
---|
737 | va_list ap; |
---|
738 | |
---|
739 | /* get buffer length */ |
---|
740 | va_start(ap, iph1); |
---|
741 | len = 0; |
---|
742 | while ((s = va_arg(ap, vchar_t *)) != NULL) { |
---|
743 | len += s->l |
---|
744 | } |
---|
745 | va_end(ap); |
---|
746 | |
---|
747 | buf = vmalloc(len); |
---|
748 | if (buf == NULL) { |
---|
749 | plog(LLV_ERROR, LOCATION, NULL, |
---|
750 | "failed to get hash buffer\n"); |
---|
751 | return NULL; |
---|
752 | } |
---|
753 | |
---|
754 | /* set buffer */ |
---|
755 | va_start(ap, iph1); |
---|
756 | p = buf->v; |
---|
757 | while ((s = va_arg(ap, char *)) != NULL) { |
---|
758 | memcpy(p, s->v, s->l); |
---|
759 | p += s->l; |
---|
760 | } |
---|
761 | va_end(ap); |
---|
762 | |
---|
763 | plog(LLV_DEBUG, LOCATION, NULL, "HASH with: \n"); |
---|
764 | plogdump(LLV_DEBUG, buf->v, buf->l); |
---|
765 | |
---|
766 | /* compute HASH */ |
---|
767 | res = oakley_prf(iph1->skeyid_a, buf, iph1); |
---|
768 | vfree(buf); |
---|
769 | if (res == NULL) |
---|
770 | return NULL; |
---|
771 | |
---|
772 | plog(LLV_DEBUG, LOCATION, NULL, "HASH computed:\n"); |
---|
773 | plogdump(LLV_DEBUG, res->v, res->l); |
---|
774 | |
---|
775 | return res; |
---|
776 | } |
---|
777 | #endif |
---|
778 | |
---|
779 | /* |
---|
780 | * compute HASH(3) prf(SKEYID_a, 0 | M-ID | Ni_b | Nr_b) |
---|
781 | * see seciton 5.5 Phase 2 - Quick Mode in isakmp-oakley-05. |
---|
782 | */ |
---|
783 | vchar_t * |
---|
784 | oakley_compute_hash3(iph1, msgid, body) |
---|
785 | struct ph1handle *iph1; |
---|
786 | u_int32_t msgid; |
---|
787 | vchar_t *body; |
---|
788 | { |
---|
789 | vchar_t *buf = 0, *res = 0; |
---|
790 | int len; |
---|
791 | int error = -1; |
---|
792 | |
---|
793 | /* create buffer */ |
---|
794 | len = 1 + sizeof(u_int32_t) + body->l; |
---|
795 | buf = vmalloc(len); |
---|
796 | if (buf == NULL) { |
---|
797 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
798 | "failed to get hash buffer\n"); |
---|
799 | goto end; |
---|
800 | } |
---|
801 | |
---|
802 | buf->v[0] = 0; |
---|
803 | |
---|
804 | memcpy(buf->v + 1, (char *)&msgid, sizeof(msgid)); |
---|
805 | |
---|
806 | memcpy(buf->v + 1 + sizeof(u_int32_t), body->v, body->l); |
---|
807 | |
---|
808 | plog(LLV_DEBUG, LOCATION, NULL, "HASH with: \n"); |
---|
809 | plogdump(LLV_DEBUG, buf->v, buf->l); |
---|
810 | |
---|
811 | /* compute HASH */ |
---|
812 | res = oakley_prf(iph1->skeyid_a, buf, iph1); |
---|
813 | if (res == NULL) |
---|
814 | goto end; |
---|
815 | |
---|
816 | error = 0; |
---|
817 | |
---|
818 | plog(LLV_DEBUG, LOCATION, NULL, "HASH computed:\n"); |
---|
819 | plogdump(LLV_DEBUG, res->v, res->l); |
---|
820 | |
---|
821 | end: |
---|
822 | if (buf != NULL) |
---|
823 | vfree(buf); |
---|
824 | return res; |
---|
825 | } |
---|
826 | |
---|
827 | /* |
---|
828 | * compute HASH type of prf(SKEYID_a, M-ID | buffer) |
---|
829 | * e.g. |
---|
830 | * for quick mode HASH(1): |
---|
831 | * prf(SKEYID_a, M-ID | SA | Ni [ | KE ] [ | IDci | IDcr ]) |
---|
832 | * for quick mode HASH(2): |
---|
833 | * prf(SKEYID_a, M-ID | Ni_b | SA | Nr [ | KE ] [ | IDci | IDcr ]) |
---|
834 | * for Informational exchange: |
---|
835 | * prf(SKEYID_a, M-ID | N/D) |
---|
836 | */ |
---|
837 | vchar_t * |
---|
838 | oakley_compute_hash1(iph1, msgid, body) |
---|
839 | struct ph1handle *iph1; |
---|
840 | u_int32_t msgid; |
---|
841 | vchar_t *body; |
---|
842 | { |
---|
843 | vchar_t *buf = NULL, *res = NULL; |
---|
844 | char *p; |
---|
845 | int len; |
---|
846 | int error = -1; |
---|
847 | |
---|
848 | /* create buffer */ |
---|
849 | len = sizeof(u_int32_t) + body->l; |
---|
850 | buf = vmalloc(len); |
---|
851 | if (buf == NULL) { |
---|
852 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
853 | "failed to get hash buffer\n"); |
---|
854 | goto end; |
---|
855 | } |
---|
856 | |
---|
857 | p = buf->v; |
---|
858 | |
---|
859 | memcpy(buf->v, (char *)&msgid, sizeof(msgid)); |
---|
860 | p += sizeof(u_int32_t); |
---|
861 | |
---|
862 | memcpy(p, body->v, body->l); |
---|
863 | |
---|
864 | plog(LLV_DEBUG, LOCATION, NULL, "HASH with:\n"); |
---|
865 | plogdump(LLV_DEBUG, buf->v, buf->l); |
---|
866 | |
---|
867 | /* compute HASH */ |
---|
868 | res = oakley_prf(iph1->skeyid_a, buf, iph1); |
---|
869 | if (res == NULL) |
---|
870 | goto end; |
---|
871 | |
---|
872 | error = 0; |
---|
873 | |
---|
874 | plog(LLV_DEBUG, LOCATION, NULL, "HASH computed:\n"); |
---|
875 | plogdump(LLV_DEBUG, res->v, res->l); |
---|
876 | |
---|
877 | end: |
---|
878 | if (buf != NULL) |
---|
879 | vfree(buf); |
---|
880 | return res; |
---|
881 | } |
---|
882 | |
---|
883 | /* |
---|
884 | * compute phase1 HASH |
---|
885 | * main/aggressive |
---|
886 | * I-digest = prf(SKEYID, g^i | g^r | CKY-I | CKY-R | SAi_b | ID_i1_b) |
---|
887 | * R-digest = prf(SKEYID, g^r | g^i | CKY-R | CKY-I | SAi_b | ID_r1_b) |
---|
888 | * for gssapi, also include all GSS tokens, and call gss_wrap on the result |
---|
889 | */ |
---|
890 | vchar_t * |
---|
891 | oakley_ph1hash_common(iph1, sw) |
---|
892 | struct ph1handle *iph1; |
---|
893 | int sw; |
---|
894 | { |
---|
895 | vchar_t *buf = NULL, *res = NULL, *bp; |
---|
896 | char *p, *bp2; |
---|
897 | int len, bl; |
---|
898 | int error = -1; |
---|
899 | #ifdef HAVE_GSSAPI |
---|
900 | vchar_t *gsstokens = NULL; |
---|
901 | #endif |
---|
902 | |
---|
903 | /* create buffer */ |
---|
904 | len = iph1->dhpub->l |
---|
905 | + iph1->dhpub_p->l |
---|
906 | + sizeof(cookie_t) * 2 |
---|
907 | + iph1->sa->l |
---|
908 | + (sw == GENERATE ? iph1->id->l : iph1->id_p->l); |
---|
909 | |
---|
910 | #ifdef HAVE_GSSAPI |
---|
911 | if (iph1->approval->authmethod == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB) { |
---|
912 | if (iph1->gi_i != NULL && iph1->gi_r != NULL) { |
---|
913 | bp = (sw == GENERATE ? iph1->gi_i : iph1->gi_r); |
---|
914 | len += bp->l; |
---|
915 | } |
---|
916 | if (sw == GENERATE) |
---|
917 | gssapi_get_itokens(iph1, &gsstokens); |
---|
918 | else |
---|
919 | gssapi_get_rtokens(iph1, &gsstokens); |
---|
920 | if (gsstokens == NULL) |
---|
921 | return NULL; |
---|
922 | len += gsstokens->l; |
---|
923 | } |
---|
924 | #endif |
---|
925 | |
---|
926 | buf = vmalloc(len); |
---|
927 | if (buf == NULL) { |
---|
928 | plog(LLV_ERROR, LOCATION, NULL, |
---|
929 | "failed to get hash buffer\n"); |
---|
930 | goto end; |
---|
931 | } |
---|
932 | |
---|
933 | p = buf->v; |
---|
934 | |
---|
935 | bp = (sw == GENERATE ? iph1->dhpub : iph1->dhpub_p); |
---|
936 | memcpy(p, bp->v, bp->l); |
---|
937 | p += bp->l; |
---|
938 | |
---|
939 | bp = (sw == GENERATE ? iph1->dhpub_p : iph1->dhpub); |
---|
940 | memcpy(p, bp->v, bp->l); |
---|
941 | p += bp->l; |
---|
942 | |
---|
943 | if (iph1->side == INITIATOR) |
---|
944 | bp2 = (sw == GENERATE ? |
---|
945 | (char *)&iph1->index.i_ck : (char *)&iph1->index.r_ck); |
---|
946 | else |
---|
947 | bp2 = (sw == GENERATE ? |
---|
948 | (char *)&iph1->index.r_ck : (char *)&iph1->index.i_ck); |
---|
949 | bl = sizeof(cookie_t); |
---|
950 | memcpy(p, bp2, bl); |
---|
951 | p += bl; |
---|
952 | |
---|
953 | if (iph1->side == INITIATOR) |
---|
954 | bp2 = (sw == GENERATE ? |
---|
955 | (char *)&iph1->index.r_ck : (char *)&iph1->index.i_ck); |
---|
956 | else |
---|
957 | bp2 = (sw == GENERATE ? |
---|
958 | (char *)&iph1->index.i_ck : (char *)&iph1->index.r_ck); |
---|
959 | bl = sizeof(cookie_t); |
---|
960 | memcpy(p, bp2, bl); |
---|
961 | p += bl; |
---|
962 | |
---|
963 | bp = iph1->sa; |
---|
964 | memcpy(p, bp->v, bp->l); |
---|
965 | p += bp->l; |
---|
966 | |
---|
967 | bp = (sw == GENERATE ? iph1->id : iph1->id_p); |
---|
968 | memcpy(p, bp->v, bp->l); |
---|
969 | p += bp->l; |
---|
970 | |
---|
971 | #ifdef HAVE_GSSAPI |
---|
972 | if (iph1->approval->authmethod == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB) { |
---|
973 | if (iph1->gi_i != NULL && iph1->gi_r != NULL) { |
---|
974 | bp = (sw == GENERATE ? iph1->gi_i : iph1->gi_r); |
---|
975 | memcpy(p, bp->v, bp->l); |
---|
976 | p += bp->l; |
---|
977 | } |
---|
978 | memcpy(p, gsstokens->v, gsstokens->l); |
---|
979 | p += gsstokens->l; |
---|
980 | } |
---|
981 | #endif |
---|
982 | |
---|
983 | plog(LLV_DEBUG, LOCATION, NULL, "HASH with:\n"); |
---|
984 | plogdump(LLV_DEBUG, buf->v, buf->l); |
---|
985 | |
---|
986 | /* compute HASH */ |
---|
987 | res = oakley_prf(iph1->skeyid, buf, iph1); |
---|
988 | if (res == NULL) |
---|
989 | goto end; |
---|
990 | |
---|
991 | error = 0; |
---|
992 | |
---|
993 | plog(LLV_DEBUG, LOCATION, NULL, "HASH (%s) computed:\n", |
---|
994 | iph1->side == INITIATOR ? "init" : "resp"); |
---|
995 | plogdump(LLV_DEBUG, res->v, res->l); |
---|
996 | |
---|
997 | end: |
---|
998 | if (buf != NULL) |
---|
999 | vfree(buf); |
---|
1000 | #ifdef HAVE_GSSAPI |
---|
1001 | if (gsstokens != NULL) |
---|
1002 | vfree(gsstokens); |
---|
1003 | #endif |
---|
1004 | return res; |
---|
1005 | } |
---|
1006 | |
---|
1007 | /* |
---|
1008 | * compute HASH_I on base mode. |
---|
1009 | * base:psk,rsa |
---|
1010 | * HASH_I = prf(SKEYID, g^xi | CKY-I | CKY-R | SAi_b | IDii_b) |
---|
1011 | * base:sig |
---|
1012 | * HASH_I = prf(hash(Ni_b | Nr_b), g^xi | CKY-I | CKY-R | SAi_b | IDii_b) |
---|
1013 | */ |
---|
1014 | vchar_t * |
---|
1015 | oakley_ph1hash_base_i(iph1, sw) |
---|
1016 | struct ph1handle *iph1; |
---|
1017 | int sw; |
---|
1018 | { |
---|
1019 | vchar_t *buf = NULL, *res = NULL, *bp; |
---|
1020 | vchar_t *hashkey = NULL; |
---|
1021 | vchar_t *hash = NULL; /* for signature mode */ |
---|
1022 | char *p; |
---|
1023 | int len; |
---|
1024 | int error = -1; |
---|
1025 | |
---|
1026 | /* sanity check */ |
---|
1027 | if (iph1->etype != ISAKMP_ETYPE_BASE) { |
---|
1028 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1029 | "invalid etype for this hash function\n"); |
---|
1030 | return NULL; |
---|
1031 | } |
---|
1032 | |
---|
1033 | switch (iph1->approval->authmethod) { |
---|
1034 | case OAKLEY_ATTR_AUTH_METHOD_PSKEY: |
---|
1035 | case OAKLEY_ATTR_AUTH_METHOD_RSAENC: |
---|
1036 | case OAKLEY_ATTR_AUTH_METHOD_RSAREV: |
---|
1037 | #ifdef ENABLE_HYBRID |
---|
1038 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I: |
---|
1039 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_R: |
---|
1040 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I: |
---|
1041 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_R: |
---|
1042 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_I: |
---|
1043 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_R: |
---|
1044 | #endif |
---|
1045 | if (iph1->skeyid == NULL) { |
---|
1046 | plog(LLV_ERROR, LOCATION, NULL, "no SKEYID found.\n"); |
---|
1047 | return NULL; |
---|
1048 | } |
---|
1049 | hashkey = iph1->skeyid; |
---|
1050 | break; |
---|
1051 | |
---|
1052 | case OAKLEY_ATTR_AUTH_METHOD_DSSSIG: |
---|
1053 | case OAKLEY_ATTR_AUTH_METHOD_RSASIG: |
---|
1054 | #ifdef HAVE_GSSAPI |
---|
1055 | case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB: |
---|
1056 | #endif |
---|
1057 | #ifdef ENABLE_HYBRID |
---|
1058 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I: |
---|
1059 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R: |
---|
1060 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I: |
---|
1061 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R: |
---|
1062 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I: |
---|
1063 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R: |
---|
1064 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I: |
---|
1065 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R: |
---|
1066 | #endif |
---|
1067 | /* make hash for seed */ |
---|
1068 | len = iph1->nonce->l + iph1->nonce_p->l; |
---|
1069 | buf = vmalloc(len); |
---|
1070 | if (buf == NULL) { |
---|
1071 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1072 | "failed to get hash buffer\n"); |
---|
1073 | goto end; |
---|
1074 | } |
---|
1075 | p = buf->v; |
---|
1076 | |
---|
1077 | bp = (sw == GENERATE ? iph1->nonce_p : iph1->nonce); |
---|
1078 | memcpy(p, bp->v, bp->l); |
---|
1079 | p += bp->l; |
---|
1080 | |
---|
1081 | bp = (sw == GENERATE ? iph1->nonce : iph1->nonce_p); |
---|
1082 | memcpy(p, bp->v, bp->l); |
---|
1083 | p += bp->l; |
---|
1084 | |
---|
1085 | hash = oakley_hash(buf, iph1); |
---|
1086 | if (hash == NULL) |
---|
1087 | goto end; |
---|
1088 | vfree(buf); |
---|
1089 | buf = NULL; |
---|
1090 | |
---|
1091 | hashkey = hash; |
---|
1092 | break; |
---|
1093 | |
---|
1094 | default: |
---|
1095 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1096 | "not supported authentication method %d\n", |
---|
1097 | iph1->approval->authmethod); |
---|
1098 | return NULL; |
---|
1099 | |
---|
1100 | } |
---|
1101 | |
---|
1102 | len = (sw == GENERATE ? iph1->dhpub->l : iph1->dhpub_p->l) |
---|
1103 | + sizeof(cookie_t) * 2 |
---|
1104 | + iph1->sa->l |
---|
1105 | + (sw == GENERATE ? iph1->id->l : iph1->id_p->l); |
---|
1106 | buf = vmalloc(len); |
---|
1107 | if (buf == NULL) { |
---|
1108 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1109 | "failed to get hash buffer\n"); |
---|
1110 | goto end; |
---|
1111 | } |
---|
1112 | p = buf->v; |
---|
1113 | |
---|
1114 | bp = (sw == GENERATE ? iph1->dhpub : iph1->dhpub_p); |
---|
1115 | memcpy(p, bp->v, bp->l); |
---|
1116 | p += bp->l; |
---|
1117 | |
---|
1118 | memcpy(p, &iph1->index.i_ck, sizeof(cookie_t)); |
---|
1119 | p += sizeof(cookie_t); |
---|
1120 | memcpy(p, &iph1->index.r_ck, sizeof(cookie_t)); |
---|
1121 | p += sizeof(cookie_t); |
---|
1122 | |
---|
1123 | memcpy(p, iph1->sa->v, iph1->sa->l); |
---|
1124 | p += iph1->sa->l; |
---|
1125 | |
---|
1126 | bp = (sw == GENERATE ? iph1->id : iph1->id_p); |
---|
1127 | memcpy(p, bp->v, bp->l); |
---|
1128 | p += bp->l; |
---|
1129 | |
---|
1130 | plog(LLV_DEBUG, LOCATION, NULL, "HASH_I with:\n"); |
---|
1131 | plogdump(LLV_DEBUG, buf->v, buf->l); |
---|
1132 | |
---|
1133 | /* compute HASH */ |
---|
1134 | res = oakley_prf(hashkey, buf, iph1); |
---|
1135 | if (res == NULL) |
---|
1136 | goto end; |
---|
1137 | |
---|
1138 | error = 0; |
---|
1139 | |
---|
1140 | plog(LLV_DEBUG, LOCATION, NULL, "HASH_I computed:\n"); |
---|
1141 | plogdump(LLV_DEBUG, res->v, res->l); |
---|
1142 | |
---|
1143 | end: |
---|
1144 | if (hash != NULL) |
---|
1145 | vfree(hash); |
---|
1146 | if (buf != NULL) |
---|
1147 | vfree(buf); |
---|
1148 | return res; |
---|
1149 | } |
---|
1150 | |
---|
1151 | /* |
---|
1152 | * compute HASH_R on base mode for signature method. |
---|
1153 | * base: |
---|
1154 | * HASH_R = prf(hash(Ni_b | Nr_b), g^xi | g^xr | CKY-I | CKY-R | SAi_b | IDii_b) |
---|
1155 | */ |
---|
1156 | vchar_t * |
---|
1157 | oakley_ph1hash_base_r(iph1, sw) |
---|
1158 | struct ph1handle *iph1; |
---|
1159 | int sw; |
---|
1160 | { |
---|
1161 | vchar_t *buf = NULL, *res = NULL, *bp; |
---|
1162 | vchar_t *hash = NULL; |
---|
1163 | char *p; |
---|
1164 | int len; |
---|
1165 | int error = -1; |
---|
1166 | |
---|
1167 | /* sanity check */ |
---|
1168 | if (iph1->etype != ISAKMP_ETYPE_BASE) { |
---|
1169 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1170 | "invalid etype for this hash function\n"); |
---|
1171 | return NULL; |
---|
1172 | } |
---|
1173 | |
---|
1174 | switch (iph1->approval->authmethod) { |
---|
1175 | case OAKLEY_ATTR_AUTH_METHOD_DSSSIG: |
---|
1176 | case OAKLEY_ATTR_AUTH_METHOD_RSASIG: |
---|
1177 | #ifdef ENABLE_HYBRID |
---|
1178 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I: |
---|
1179 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R: |
---|
1180 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I: |
---|
1181 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R: |
---|
1182 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I: |
---|
1183 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R: |
---|
1184 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I: |
---|
1185 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R: |
---|
1186 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_I: |
---|
1187 | #endif |
---|
1188 | break; |
---|
1189 | default: |
---|
1190 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1191 | "not supported authentication method %d\n", |
---|
1192 | iph1->approval->authmethod); |
---|
1193 | return NULL; |
---|
1194 | break; |
---|
1195 | } |
---|
1196 | |
---|
1197 | /* make hash for seed */ |
---|
1198 | len = iph1->nonce->l + iph1->nonce_p->l; |
---|
1199 | buf = vmalloc(len); |
---|
1200 | if (buf == NULL) { |
---|
1201 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1202 | "failed to get hash buffer\n"); |
---|
1203 | goto end; |
---|
1204 | } |
---|
1205 | p = buf->v; |
---|
1206 | |
---|
1207 | bp = (sw == GENERATE ? iph1->nonce_p : iph1->nonce); |
---|
1208 | memcpy(p, bp->v, bp->l); |
---|
1209 | p += bp->l; |
---|
1210 | |
---|
1211 | bp = (sw == GENERATE ? iph1->nonce : iph1->nonce_p); |
---|
1212 | memcpy(p, bp->v, bp->l); |
---|
1213 | p += bp->l; |
---|
1214 | |
---|
1215 | hash = oakley_hash(buf, iph1); |
---|
1216 | if (hash == NULL) |
---|
1217 | goto end; |
---|
1218 | vfree(buf); |
---|
1219 | buf = NULL; |
---|
1220 | |
---|
1221 | /* make really hash */ |
---|
1222 | len = (sw == GENERATE ? iph1->dhpub_p->l : iph1->dhpub->l) |
---|
1223 | + (sw == GENERATE ? iph1->dhpub->l : iph1->dhpub_p->l) |
---|
1224 | + sizeof(cookie_t) * 2 |
---|
1225 | + iph1->sa->l |
---|
1226 | + (sw == GENERATE ? iph1->id_p->l : iph1->id->l); |
---|
1227 | buf = vmalloc(len); |
---|
1228 | if (buf == NULL) { |
---|
1229 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1230 | "failed to get hash buffer\n"); |
---|
1231 | goto end; |
---|
1232 | } |
---|
1233 | p = buf->v; |
---|
1234 | |
---|
1235 | |
---|
1236 | bp = (sw == GENERATE ? iph1->dhpub_p : iph1->dhpub); |
---|
1237 | memcpy(p, bp->v, bp->l); |
---|
1238 | p += bp->l; |
---|
1239 | |
---|
1240 | bp = (sw == GENERATE ? iph1->dhpub : iph1->dhpub_p); |
---|
1241 | memcpy(p, bp->v, bp->l); |
---|
1242 | p += bp->l; |
---|
1243 | |
---|
1244 | memcpy(p, &iph1->index.i_ck, sizeof(cookie_t)); |
---|
1245 | p += sizeof(cookie_t); |
---|
1246 | memcpy(p, &iph1->index.r_ck, sizeof(cookie_t)); |
---|
1247 | p += sizeof(cookie_t); |
---|
1248 | |
---|
1249 | memcpy(p, iph1->sa->v, iph1->sa->l); |
---|
1250 | p += iph1->sa->l; |
---|
1251 | |
---|
1252 | bp = (sw == GENERATE ? iph1->id_p : iph1->id); |
---|
1253 | memcpy(p, bp->v, bp->l); |
---|
1254 | p += bp->l; |
---|
1255 | |
---|
1256 | plog(LLV_DEBUG, LOCATION, NULL, "HASH_R with:\n"); |
---|
1257 | plogdump(LLV_DEBUG, buf->v, buf->l); |
---|
1258 | |
---|
1259 | /* compute HASH */ |
---|
1260 | res = oakley_prf(hash, buf, iph1); |
---|
1261 | if (res == NULL) |
---|
1262 | goto end; |
---|
1263 | |
---|
1264 | error = 0; |
---|
1265 | |
---|
1266 | plog(LLV_DEBUG, LOCATION, NULL, "HASH_R computed:\n"); |
---|
1267 | plogdump(LLV_DEBUG, res->v, res->l); |
---|
1268 | |
---|
1269 | end: |
---|
1270 | if (buf != NULL) |
---|
1271 | vfree(buf); |
---|
1272 | if (hash) |
---|
1273 | vfree(hash); |
---|
1274 | return res; |
---|
1275 | } |
---|
1276 | |
---|
1277 | /* |
---|
1278 | * compute each authentication method in phase 1. |
---|
1279 | * OUT: |
---|
1280 | * 0: OK |
---|
1281 | * -1: error |
---|
1282 | * other: error to be reply with notification. |
---|
1283 | * the value is notification type. |
---|
1284 | */ |
---|
1285 | int |
---|
1286 | oakley_validate_auth(iph1) |
---|
1287 | struct ph1handle *iph1; |
---|
1288 | { |
---|
1289 | vchar_t *my_hash = NULL; |
---|
1290 | int result; |
---|
1291 | int no_verify_needed = -1; |
---|
1292 | #ifdef HAVE_GSSAPI |
---|
1293 | vchar_t *gsshash = NULL; |
---|
1294 | #endif |
---|
1295 | #ifdef ENABLE_STATS |
---|
1296 | struct timeval start, end; |
---|
1297 | #endif |
---|
1298 | |
---|
1299 | #ifdef ENABLE_STATS |
---|
1300 | gettimeofday(&start, NULL); |
---|
1301 | #endif |
---|
1302 | |
---|
1303 | switch (iph1->approval->authmethod) { |
---|
1304 | case OAKLEY_ATTR_AUTH_METHOD_PSKEY: |
---|
1305 | #ifdef ENABLE_HYBRID |
---|
1306 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_I: |
---|
1307 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_R: |
---|
1308 | #endif |
---|
1309 | /* validate HASH */ |
---|
1310 | { |
---|
1311 | char *r_hash; |
---|
1312 | |
---|
1313 | if (iph1->id_p == NULL || iph1->pl_hash == NULL) { |
---|
1314 | plog(LLV_ERROR, LOCATION, iph1->remote, |
---|
1315 | "few isakmp message received.\n"); |
---|
1316 | return ISAKMP_NTYPE_PAYLOAD_MALFORMED; |
---|
1317 | } |
---|
1318 | #ifdef ENABLE_HYBRID |
---|
1319 | if (iph1->approval->authmethod == OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_I && |
---|
1320 | ((iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_XAUTH) == 0)) |
---|
1321 | { |
---|
1322 | plog(LLV_ERROR, LOCATION, NULL, "No SIG was passed, " |
---|
1323 | "hybrid auth is enabled, " |
---|
1324 | "but peer is no Xauth compliant\n"); |
---|
1325 | return ISAKMP_NTYPE_SITUATION_NOT_SUPPORTED; |
---|
1326 | break; |
---|
1327 | } |
---|
1328 | #endif |
---|
1329 | r_hash = (caddr_t)(iph1->pl_hash + 1); |
---|
1330 | |
---|
1331 | plog(LLV_DEBUG, LOCATION, NULL, "HASH received:\n"); |
---|
1332 | plogdump(LLV_DEBUG, r_hash, |
---|
1333 | ntohs(iph1->pl_hash->h.len) - sizeof(*iph1->pl_hash)); |
---|
1334 | |
---|
1335 | switch (iph1->etype) { |
---|
1336 | case ISAKMP_ETYPE_IDENT: |
---|
1337 | case ISAKMP_ETYPE_AGG: |
---|
1338 | my_hash = oakley_ph1hash_common(iph1, VALIDATE); |
---|
1339 | break; |
---|
1340 | case ISAKMP_ETYPE_BASE: |
---|
1341 | if (iph1->side == INITIATOR) |
---|
1342 | my_hash = oakley_ph1hash_common(iph1, VALIDATE); |
---|
1343 | else |
---|
1344 | my_hash = oakley_ph1hash_base_i(iph1, VALIDATE); |
---|
1345 | break; |
---|
1346 | default: |
---|
1347 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1348 | "invalid etype %d\n", iph1->etype); |
---|
1349 | return ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE; |
---|
1350 | } |
---|
1351 | if (my_hash == NULL) |
---|
1352 | return ISAKMP_INTERNAL_ERROR; |
---|
1353 | |
---|
1354 | result = memcmp(my_hash->v, r_hash, my_hash->l); |
---|
1355 | vfree(my_hash); |
---|
1356 | |
---|
1357 | if (result) { |
---|
1358 | plog(LLV_ERROR, LOCATION, NULL, "HASH mismatched\n"); |
---|
1359 | return ISAKMP_NTYPE_INVALID_HASH_INFORMATION; |
---|
1360 | } |
---|
1361 | |
---|
1362 | plog(LLV_DEBUG, LOCATION, NULL, "HASH for PSK validated.\n"); |
---|
1363 | } |
---|
1364 | break; |
---|
1365 | #ifdef ENABLE_HYBRID |
---|
1366 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I: |
---|
1367 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I: |
---|
1368 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I: |
---|
1369 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R: |
---|
1370 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I: |
---|
1371 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R: |
---|
1372 | no_verify_needed = 0; |
---|
1373 | #endif |
---|
1374 | case OAKLEY_ATTR_AUTH_METHOD_DSSSIG: |
---|
1375 | case OAKLEY_ATTR_AUTH_METHOD_RSASIG: |
---|
1376 | { |
---|
1377 | int error = 0; |
---|
1378 | int certtype; |
---|
1379 | |
---|
1380 | /* validation */ |
---|
1381 | if (iph1->id_p == NULL) { |
---|
1382 | plog(LLV_ERROR, LOCATION, iph1->remote, |
---|
1383 | "no ID payload was passed.\n"); |
---|
1384 | return ISAKMP_NTYPE_PAYLOAD_MALFORMED; |
---|
1385 | } |
---|
1386 | if (iph1->sig_p == NULL) { |
---|
1387 | plog(LLV_ERROR, LOCATION, iph1->remote, |
---|
1388 | "no SIG payload was passed.\n"); |
---|
1389 | return ISAKMP_NTYPE_PAYLOAD_MALFORMED; |
---|
1390 | } |
---|
1391 | |
---|
1392 | plog(LLV_DEBUG, LOCATION, NULL, "SIGN passed:\n"); |
---|
1393 | plogdump(LLV_DEBUG, iph1->sig_p->v, iph1->sig_p->l); |
---|
1394 | |
---|
1395 | /* get peer's cert */ |
---|
1396 | certtype = oakley_get_certtype(iph1->rmconf->peerscert); |
---|
1397 | switch (certtype) { |
---|
1398 | case ISAKMP_CERT_NONE: |
---|
1399 | /* expect to receive one from peer */ |
---|
1400 | if (iph1->cert_p == NULL) { |
---|
1401 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1402 | "no peer's CERT payload found.\n"); |
---|
1403 | return ISAKMP_INTERNAL_ERROR; |
---|
1404 | } |
---|
1405 | /* verify the cert if needed */ |
---|
1406 | if (!iph1->rmconf->verify_cert) |
---|
1407 | break; |
---|
1408 | |
---|
1409 | switch (oakley_get_certtype(iph1->cert_p)) { |
---|
1410 | case ISAKMP_CERT_X509SIGN: { |
---|
1411 | char path[MAXPATHLEN]; |
---|
1412 | char *ca; |
---|
1413 | |
---|
1414 | if (iph1->rmconf->cacertfile != NULL) { |
---|
1415 | getpathname(path, sizeof(path), |
---|
1416 | LC_PATHTYPE_CERT, |
---|
1417 | iph1->rmconf->cacertfile); |
---|
1418 | ca = path; |
---|
1419 | } else { |
---|
1420 | ca = NULL; |
---|
1421 | } |
---|
1422 | |
---|
1423 | error = eay_check_x509cert( |
---|
1424 | iph1->cert_p, |
---|
1425 | lcconf->pathinfo[LC_PATHTYPE_CERT], |
---|
1426 | ca, 0); |
---|
1427 | break; |
---|
1428 | } |
---|
1429 | default: |
---|
1430 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1431 | "peers_cert certtype %d was not expected\n", |
---|
1432 | certtype); |
---|
1433 | return ISAKMP_INTERNAL_ERROR; |
---|
1434 | } |
---|
1435 | |
---|
1436 | if (error != 0) { |
---|
1437 | plog(LLV_ERROR, LOCATION, iph1->remote, |
---|
1438 | "the peer's certificate is not verified.\n"); |
---|
1439 | return ISAKMP_NTYPE_INVALID_CERT_AUTHORITY; |
---|
1440 | } |
---|
1441 | break; |
---|
1442 | case ISAKMP_CERT_X509SIGN: |
---|
1443 | if (iph1->rmconf->peerscert == NULL) { |
---|
1444 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1445 | "no peer's CERT file found.\n"); |
---|
1446 | return ISAKMP_INTERNAL_ERROR; |
---|
1447 | } |
---|
1448 | /* don't use received cert */ |
---|
1449 | if (iph1->cert_p != NULL) { |
---|
1450 | vfree(iph1->cert_p); |
---|
1451 | iph1->cert_p = NULL; |
---|
1452 | } |
---|
1453 | /* copy from remoteconf instead */ |
---|
1454 | iph1->cert_p = vdup(iph1->rmconf->peerscert); |
---|
1455 | break; |
---|
1456 | case ISAKMP_CERT_PLAINRSA: |
---|
1457 | if (get_plainrsa_fromlocal(iph1, 0)) |
---|
1458 | return ISAKMP_INTERNAL_ERROR; |
---|
1459 | /* suppress CERT validation warning, unless hybrid mode in use */ |
---|
1460 | if (no_verify_needed == -1) |
---|
1461 | no_verify_needed = 1; |
---|
1462 | break; |
---|
1463 | case ISAKMP_CERT_DNS: |
---|
1464 | /* don't use received cert */ |
---|
1465 | if (iph1->cert_p != NULL) { |
---|
1466 | vfree(iph1->cert_p); |
---|
1467 | iph1->cert_p = NULL; |
---|
1468 | } |
---|
1469 | |
---|
1470 | iph1->cert_p = dnssec_getcert(iph1->id_p); |
---|
1471 | if (iph1->cert_p == NULL) { |
---|
1472 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1473 | "no CERT RR found.\n"); |
---|
1474 | return ISAKMP_INTERNAL_ERROR; |
---|
1475 | } |
---|
1476 | break; |
---|
1477 | default: |
---|
1478 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1479 | "invalid certificate type: %d\n", |
---|
1480 | oakley_get_certtype(iph1->rmconf->peerscert)); |
---|
1481 | return ISAKMP_INTERNAL_ERROR; |
---|
1482 | } |
---|
1483 | |
---|
1484 | /* compare ID payload and certificate name */ |
---|
1485 | if ((error = oakley_check_certid(iph1)) != 0) |
---|
1486 | return error; |
---|
1487 | |
---|
1488 | /* Generate a warning unless verify_cert */ |
---|
1489 | if (iph1->rmconf->verify_cert) { |
---|
1490 | plog(LLV_DEBUG, LOCATION, iph1->remote, |
---|
1491 | "CERT validated\n"); |
---|
1492 | } else if (no_verify_needed != 1) { |
---|
1493 | plog(LLV_WARNING, LOCATION, iph1->remote, |
---|
1494 | "CERT validation disabled by configuration\n"); |
---|
1495 | } |
---|
1496 | |
---|
1497 | /* compute hash */ |
---|
1498 | switch (iph1->etype) { |
---|
1499 | case ISAKMP_ETYPE_IDENT: |
---|
1500 | case ISAKMP_ETYPE_AGG: |
---|
1501 | my_hash = oakley_ph1hash_common(iph1, VALIDATE); |
---|
1502 | break; |
---|
1503 | case ISAKMP_ETYPE_BASE: |
---|
1504 | if (iph1->side == INITIATOR) |
---|
1505 | my_hash = oakley_ph1hash_base_r(iph1, VALIDATE); |
---|
1506 | else |
---|
1507 | my_hash = oakley_ph1hash_base_i(iph1, VALIDATE); |
---|
1508 | break; |
---|
1509 | default: |
---|
1510 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1511 | "invalid etype %d\n", iph1->etype); |
---|
1512 | return ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE; |
---|
1513 | } |
---|
1514 | if (my_hash == NULL) |
---|
1515 | return ISAKMP_INTERNAL_ERROR; |
---|
1516 | |
---|
1517 | /* check signature */ |
---|
1518 | certtype = oakley_get_certtype(iph1->cert_p); |
---|
1519 | if (certtype == ISAKMP_CERT_NONE) |
---|
1520 | certtype = oakley_get_certtype(iph1->rmconf->peerscert); |
---|
1521 | switch (certtype) { |
---|
1522 | case ISAKMP_CERT_X509SIGN: |
---|
1523 | case ISAKMP_CERT_DNS: |
---|
1524 | error = eay_check_x509sign(my_hash, |
---|
1525 | iph1->sig_p, |
---|
1526 | iph1->cert_p); |
---|
1527 | break; |
---|
1528 | case ISAKMP_CERT_PLAINRSA: |
---|
1529 | iph1->rsa_p = rsa_try_check_rsasign(my_hash, |
---|
1530 | iph1->sig_p, iph1->rsa_candidates); |
---|
1531 | error = iph1->rsa_p ? 0 : -1; |
---|
1532 | genlist_free(iph1->rsa_candidates, NULL); |
---|
1533 | iph1->rsa_candidates = NULL; |
---|
1534 | break; |
---|
1535 | default: |
---|
1536 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1537 | "cannot check signature for certtype %d\n", |
---|
1538 | certtype); |
---|
1539 | vfree(my_hash); |
---|
1540 | return ISAKMP_INTERNAL_ERROR; |
---|
1541 | } |
---|
1542 | |
---|
1543 | vfree(my_hash); |
---|
1544 | if (error != 0) { |
---|
1545 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1546 | "Invalid SIG.\n"); |
---|
1547 | return ISAKMP_NTYPE_INVALID_SIGNATURE; |
---|
1548 | } |
---|
1549 | plog(LLV_DEBUG, LOCATION, NULL, "SIG authenticated\n"); |
---|
1550 | } |
---|
1551 | break; |
---|
1552 | #ifdef ENABLE_HYBRID |
---|
1553 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R: |
---|
1554 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R: |
---|
1555 | { |
---|
1556 | if ((iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_XAUTH) == 0) { |
---|
1557 | plog(LLV_ERROR, LOCATION, NULL, "No SIG was passed, " |
---|
1558 | "hybrid auth is enabled, " |
---|
1559 | "but peer is no Xauth compliant\n"); |
---|
1560 | return ISAKMP_NTYPE_SITUATION_NOT_SUPPORTED; |
---|
1561 | break; |
---|
1562 | } |
---|
1563 | plog(LLV_INFO, LOCATION, NULL, "No SIG was passed, " |
---|
1564 | "but hybrid auth is enabled\n"); |
---|
1565 | |
---|
1566 | return 0; |
---|
1567 | break; |
---|
1568 | } |
---|
1569 | #endif |
---|
1570 | #ifdef HAVE_GSSAPI |
---|
1571 | case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB: |
---|
1572 | /* check if we're not into XAUTH_PSKEY_I instead */ |
---|
1573 | #ifdef ENABLE_HYBRID |
---|
1574 | if (iph1->rmconf->xauth) |
---|
1575 | break; |
---|
1576 | #endif |
---|
1577 | switch (iph1->etype) { |
---|
1578 | case ISAKMP_ETYPE_IDENT: |
---|
1579 | case ISAKMP_ETYPE_AGG: |
---|
1580 | my_hash = oakley_ph1hash_common(iph1, VALIDATE); |
---|
1581 | break; |
---|
1582 | default: |
---|
1583 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1584 | "invalid etype %d\n", iph1->etype); |
---|
1585 | return ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE; |
---|
1586 | } |
---|
1587 | |
---|
1588 | if (my_hash == NULL) { |
---|
1589 | if (gssapi_more_tokens(iph1)) |
---|
1590 | return ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE; |
---|
1591 | else |
---|
1592 | return ISAKMP_NTYPE_INVALID_HASH_INFORMATION; |
---|
1593 | } |
---|
1594 | |
---|
1595 | gsshash = gssapi_unwraphash(iph1); |
---|
1596 | if (gsshash == NULL) { |
---|
1597 | vfree(my_hash); |
---|
1598 | return ISAKMP_NTYPE_INVALID_HASH_INFORMATION; |
---|
1599 | } |
---|
1600 | |
---|
1601 | result = memcmp(my_hash->v, gsshash->v, my_hash->l); |
---|
1602 | vfree(my_hash); |
---|
1603 | vfree(gsshash); |
---|
1604 | |
---|
1605 | if (result) { |
---|
1606 | plog(LLV_ERROR, LOCATION, NULL, "HASH mismatched\n"); |
---|
1607 | return ISAKMP_NTYPE_INVALID_HASH_INFORMATION; |
---|
1608 | } |
---|
1609 | plog(LLV_DEBUG, LOCATION, NULL, "hash compared OK\n"); |
---|
1610 | break; |
---|
1611 | #endif |
---|
1612 | case OAKLEY_ATTR_AUTH_METHOD_RSAENC: |
---|
1613 | case OAKLEY_ATTR_AUTH_METHOD_RSAREV: |
---|
1614 | #ifdef ENABLE_HYBRID |
---|
1615 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I: |
---|
1616 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_R: |
---|
1617 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I: |
---|
1618 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_R: |
---|
1619 | #endif |
---|
1620 | if (iph1->id_p == NULL || iph1->pl_hash == NULL) { |
---|
1621 | plog(LLV_ERROR, LOCATION, iph1->remote, |
---|
1622 | "few isakmp message received.\n"); |
---|
1623 | return ISAKMP_NTYPE_PAYLOAD_MALFORMED; |
---|
1624 | } |
---|
1625 | plog(LLV_ERROR, LOCATION, iph1->remote, |
---|
1626 | "not supported authmethod type %s\n", |
---|
1627 | s_oakley_attr_method(iph1->approval->authmethod)); |
---|
1628 | return ISAKMP_INTERNAL_ERROR; |
---|
1629 | default: |
---|
1630 | plog(LLV_ERROR, LOCATION, iph1->remote, |
---|
1631 | "invalid authmethod %d why ?\n", |
---|
1632 | iph1->approval->authmethod); |
---|
1633 | return ISAKMP_INTERNAL_ERROR; |
---|
1634 | } |
---|
1635 | #ifdef ENABLE_STATS |
---|
1636 | gettimeofday(&end, NULL); |
---|
1637 | syslog(LOG_NOTICE, "%s(%s): %8.6f", __func__, |
---|
1638 | s_oakley_attr_method(iph1->approval->authmethod), |
---|
1639 | timedelta(&start, &end)); |
---|
1640 | #endif |
---|
1641 | |
---|
1642 | return 0; |
---|
1643 | } |
---|
1644 | |
---|
1645 | /* get my certificate |
---|
1646 | * NOTE: include certificate type. |
---|
1647 | */ |
---|
1648 | int |
---|
1649 | oakley_getmycert(iph1) |
---|
1650 | struct ph1handle *iph1; |
---|
1651 | { |
---|
1652 | switch (oakley_get_certtype(iph1->rmconf->mycert)) { |
---|
1653 | case ISAKMP_CERT_X509SIGN: |
---|
1654 | if (iph1->cert) |
---|
1655 | return 0; |
---|
1656 | iph1->cert = vdup(iph1->rmconf->mycert); |
---|
1657 | break; |
---|
1658 | case ISAKMP_CERT_PLAINRSA: |
---|
1659 | if (iph1->rsa) |
---|
1660 | return 0; |
---|
1661 | return get_plainrsa_fromlocal(iph1, 1); |
---|
1662 | default: |
---|
1663 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1664 | "Unknown certtype #%d\n", |
---|
1665 | oakley_get_certtype(iph1->rmconf->mycert)); |
---|
1666 | return -1; |
---|
1667 | } |
---|
1668 | |
---|
1669 | return 0; |
---|
1670 | } |
---|
1671 | |
---|
1672 | static int |
---|
1673 | get_plainrsa_fromlocal(iph1, my) |
---|
1674 | struct ph1handle *iph1; |
---|
1675 | int my; |
---|
1676 | { |
---|
1677 | char path[MAXPATHLEN]; |
---|
1678 | vchar_t *cert = NULL; |
---|
1679 | char *certfile; |
---|
1680 | int error = -1; |
---|
1681 | |
---|
1682 | iph1->rsa_candidates = rsa_lookup_keys(iph1, my); |
---|
1683 | if (!iph1->rsa_candidates || |
---|
1684 | rsa_list_count(iph1->rsa_candidates) == 0) { |
---|
1685 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1686 | "%s RSA key not found for %s\n", |
---|
1687 | my ? "Private" : "Public", |
---|
1688 | saddr2str_fromto("%s <-> %s", |
---|
1689 | iph1->local, iph1->remote)); |
---|
1690 | goto end; |
---|
1691 | } |
---|
1692 | |
---|
1693 | if (my && rsa_list_count(iph1->rsa_candidates) > 1) { |
---|
1694 | plog(LLV_WARNING, LOCATION, NULL, |
---|
1695 | "More than one (=%lu) private " |
---|
1696 | "PlainRSA key found for %s\n", |
---|
1697 | rsa_list_count(iph1->rsa_candidates), |
---|
1698 | saddr2str_fromto("%s <-> %s", |
---|
1699 | iph1->local, iph1->remote)); |
---|
1700 | plog(LLV_WARNING, LOCATION, NULL, |
---|
1701 | "This may have unpredictable results, " |
---|
1702 | "i.e. wrong key could be used!\n"); |
---|
1703 | plog(LLV_WARNING, LOCATION, NULL, |
---|
1704 | "Consider using only one single private " |
---|
1705 | "key for all peers...\n"); |
---|
1706 | } |
---|
1707 | if (my) { |
---|
1708 | iph1->rsa = ((struct rsa_key *) |
---|
1709 | genlist_next(iph1->rsa_candidates, NULL))->rsa; |
---|
1710 | |
---|
1711 | genlist_free(iph1->rsa_candidates, NULL); |
---|
1712 | iph1->rsa_candidates = NULL; |
---|
1713 | |
---|
1714 | if (iph1->rsa == NULL) |
---|
1715 | goto end; |
---|
1716 | } |
---|
1717 | |
---|
1718 | error = 0; |
---|
1719 | |
---|
1720 | end: |
---|
1721 | return error; |
---|
1722 | } |
---|
1723 | |
---|
1724 | /* get signature */ |
---|
1725 | int |
---|
1726 | oakley_getsign(iph1) |
---|
1727 | struct ph1handle *iph1; |
---|
1728 | { |
---|
1729 | char path[MAXPATHLEN]; |
---|
1730 | vchar_t *privkey = NULL; |
---|
1731 | int error = -1; |
---|
1732 | |
---|
1733 | switch (oakley_get_certtype(iph1->rmconf->mycert)) { |
---|
1734 | case ISAKMP_CERT_X509SIGN: |
---|
1735 | case ISAKMP_CERT_DNS: |
---|
1736 | if (iph1->rmconf->myprivfile == NULL) { |
---|
1737 | plog(LLV_ERROR, LOCATION, NULL, "no cert defined.\n"); |
---|
1738 | goto end; |
---|
1739 | } |
---|
1740 | |
---|
1741 | /* make private file name */ |
---|
1742 | getpathname(path, sizeof(path), |
---|
1743 | LC_PATHTYPE_CERT, |
---|
1744 | iph1->rmconf->myprivfile); |
---|
1745 | privkey = privsep_eay_get_pkcs1privkey(path); |
---|
1746 | if (privkey == NULL) { |
---|
1747 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1748 | "failed to get private key.\n"); |
---|
1749 | goto end; |
---|
1750 | } |
---|
1751 | plog(LLV_DEBUG2, LOCATION, NULL, "private key:\n"); |
---|
1752 | plogdump(LLV_DEBUG2, privkey->v, privkey->l); |
---|
1753 | iph1->sig = eay_get_x509sign(iph1->hash, privkey); |
---|
1754 | break; |
---|
1755 | case ISAKMP_CERT_PLAINRSA: |
---|
1756 | iph1->sig = eay_get_rsasign(iph1->hash, iph1->rsa); |
---|
1757 | break; |
---|
1758 | default: |
---|
1759 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1760 | "Unknown certtype #%d\n", |
---|
1761 | oakley_get_certtype(iph1->rmconf->mycert)); |
---|
1762 | goto end; |
---|
1763 | } |
---|
1764 | |
---|
1765 | if (iph1->sig == NULL) { |
---|
1766 | plog(LLV_ERROR, LOCATION, NULL, "failed to sign.\n"); |
---|
1767 | goto end; |
---|
1768 | } |
---|
1769 | |
---|
1770 | plog(LLV_DEBUG, LOCATION, NULL, "SIGN computed:\n"); |
---|
1771 | plogdump(LLV_DEBUG, iph1->sig->v, iph1->sig->l); |
---|
1772 | |
---|
1773 | error = 0; |
---|
1774 | |
---|
1775 | end: |
---|
1776 | if (privkey != NULL) |
---|
1777 | vfree(privkey); |
---|
1778 | |
---|
1779 | return error; |
---|
1780 | } |
---|
1781 | |
---|
1782 | /* |
---|
1783 | * compare certificate name and ID value. |
---|
1784 | */ |
---|
1785 | static int |
---|
1786 | oakley_check_certid(iph1) |
---|
1787 | struct ph1handle *iph1; |
---|
1788 | { |
---|
1789 | struct ipsecdoi_id_b *id_b; |
---|
1790 | vchar_t *name = NULL; |
---|
1791 | char *altname = NULL; |
---|
1792 | int idlen, type; |
---|
1793 | int error; |
---|
1794 | |
---|
1795 | if (iph1->rmconf == NULL || iph1->rmconf->verify_cert == FALSE) |
---|
1796 | return 0; |
---|
1797 | |
---|
1798 | if (iph1->id_p == NULL || iph1->cert_p == NULL) { |
---|
1799 | plog(LLV_ERROR, LOCATION, iph1->remote, "no ID nor CERT found.\n"); |
---|
1800 | return ISAKMP_NTYPE_INVALID_ID_INFORMATION; |
---|
1801 | } |
---|
1802 | |
---|
1803 | id_b = (struct ipsecdoi_id_b *)iph1->id_p->v; |
---|
1804 | idlen = iph1->id_p->l - sizeof(*id_b); |
---|
1805 | |
---|
1806 | switch (id_b->type) { |
---|
1807 | case IPSECDOI_ID_DER_ASN1_DN: |
---|
1808 | name = eay_get_x509asn1subjectname(iph1->cert_p); |
---|
1809 | if (!name) { |
---|
1810 | plog(LLV_ERROR, LOCATION, iph1->remote, |
---|
1811 | "failed to get subjectName\n"); |
---|
1812 | return ISAKMP_NTYPE_INVALID_CERTIFICATE; |
---|
1813 | } |
---|
1814 | if (idlen != name->l) { |
---|
1815 | plog(LLV_ERROR, LOCATION, iph1->remote, |
---|
1816 | "Invalid ID length in phase 1.\n"); |
---|
1817 | vfree(name); |
---|
1818 | return ISAKMP_NTYPE_INVALID_ID_INFORMATION; |
---|
1819 | } |
---|
1820 | error = memcmp(id_b + 1, name->v, idlen); |
---|
1821 | if (error != 0) { |
---|
1822 | plog(LLV_ERROR, LOCATION, iph1->remote, |
---|
1823 | "ID mismatched with ASN1 SubjectName.\n"); |
---|
1824 | plogdump(LLV_DEBUG, id_b + 1, idlen); |
---|
1825 | plogdump(LLV_DEBUG, name->v, idlen); |
---|
1826 | if (iph1->rmconf->verify_identifier) { |
---|
1827 | vfree(name); |
---|
1828 | return ISAKMP_NTYPE_INVALID_ID_INFORMATION; |
---|
1829 | } |
---|
1830 | } |
---|
1831 | vfree(name); |
---|
1832 | return 0; |
---|
1833 | case IPSECDOI_ID_IPV4_ADDR: |
---|
1834 | case IPSECDOI_ID_IPV6_ADDR: |
---|
1835 | { |
---|
1836 | /* |
---|
1837 | * converting to binary from string because openssl return |
---|
1838 | * a string even if object is a binary. |
---|
1839 | * XXX fix it ! access by ASN.1 directly without. |
---|
1840 | */ |
---|
1841 | struct addrinfo hints, *res; |
---|
1842 | caddr_t a = NULL; |
---|
1843 | int pos; |
---|
1844 | |
---|
1845 | for (pos = 1; ; pos++) { |
---|
1846 | if (eay_get_x509subjectaltname(iph1->cert_p, |
---|
1847 | &altname, &type, pos) !=0) { |
---|
1848 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1849 | "failed to get subjectAltName\n"); |
---|
1850 | return ISAKMP_NTYPE_INVALID_CERTIFICATE; |
---|
1851 | } |
---|
1852 | |
---|
1853 | /* it's the end condition of the loop. */ |
---|
1854 | if (!altname) { |
---|
1855 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1856 | "no proper subjectAltName.\n"); |
---|
1857 | return ISAKMP_NTYPE_INVALID_CERTIFICATE; |
---|
1858 | } |
---|
1859 | |
---|
1860 | if (check_typeofcertname(id_b->type, type) == 0) |
---|
1861 | break; |
---|
1862 | |
---|
1863 | /* next name */ |
---|
1864 | racoon_free(altname); |
---|
1865 | altname = NULL; |
---|
1866 | } |
---|
1867 | memset(&hints, 0, sizeof(hints)); |
---|
1868 | hints.ai_family = PF_UNSPEC; |
---|
1869 | hints.ai_socktype = SOCK_RAW; |
---|
1870 | hints.ai_flags = AI_NUMERICHOST; |
---|
1871 | error = getaddrinfo(altname, NULL, &hints, &res); |
---|
1872 | racoon_free(altname); |
---|
1873 | altname = NULL; |
---|
1874 | if (error != 0) { |
---|
1875 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1876 | "no proper subjectAltName.\n"); |
---|
1877 | return ISAKMP_NTYPE_INVALID_CERTIFICATE; |
---|
1878 | } |
---|
1879 | switch (res->ai_family) { |
---|
1880 | case AF_INET: |
---|
1881 | a = (caddr_t)&((struct sockaddr_in *)res->ai_addr)->sin_addr.s_addr; |
---|
1882 | break; |
---|
1883 | #ifdef INET6 |
---|
1884 | case AF_INET6: |
---|
1885 | a = (caddr_t)&((struct sockaddr_in6 *)res->ai_addr)->sin6_addr.s6_addr; |
---|
1886 | break; |
---|
1887 | #endif |
---|
1888 | default: |
---|
1889 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1890 | "family not supported: %d.\n", res->ai_family); |
---|
1891 | freeaddrinfo(res); |
---|
1892 | return ISAKMP_NTYPE_INVALID_CERTIFICATE; |
---|
1893 | } |
---|
1894 | error = memcmp(id_b + 1, a, idlen); |
---|
1895 | freeaddrinfo(res); |
---|
1896 | vfree(name); |
---|
1897 | if (error != 0) { |
---|
1898 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1899 | "ID mismatched with subjectAltName.\n"); |
---|
1900 | plogdump(LLV_DEBUG, id_b + 1, idlen); |
---|
1901 | plogdump(LLV_DEBUG, a, idlen); |
---|
1902 | if (iph1->rmconf->verify_identifier) |
---|
1903 | return ISAKMP_NTYPE_INVALID_ID_INFORMATION; |
---|
1904 | } |
---|
1905 | return 0; |
---|
1906 | } |
---|
1907 | case IPSECDOI_ID_FQDN: |
---|
1908 | case IPSECDOI_ID_USER_FQDN: |
---|
1909 | { |
---|
1910 | int pos; |
---|
1911 | |
---|
1912 | for (pos = 1; ; pos++) { |
---|
1913 | if (eay_get_x509subjectaltname(iph1->cert_p, |
---|
1914 | &altname, &type, pos) != 0){ |
---|
1915 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1916 | "failed to get subjectAltName\n"); |
---|
1917 | return ISAKMP_NTYPE_INVALID_CERTIFICATE; |
---|
1918 | } |
---|
1919 | |
---|
1920 | /* it's the end condition of the loop. */ |
---|
1921 | if (!altname) { |
---|
1922 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1923 | "no proper subjectAltName.\n"); |
---|
1924 | return ISAKMP_NTYPE_INVALID_CERTIFICATE; |
---|
1925 | } |
---|
1926 | |
---|
1927 | if (check_typeofcertname(id_b->type, type) == 0) |
---|
1928 | break; |
---|
1929 | |
---|
1930 | /* next name */ |
---|
1931 | racoon_free(altname); |
---|
1932 | altname = NULL; |
---|
1933 | } |
---|
1934 | if (idlen != strlen(altname)) { |
---|
1935 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1936 | "Invalid ID length in phase 1.\n"); |
---|
1937 | racoon_free(altname); |
---|
1938 | return ISAKMP_NTYPE_INVALID_ID_INFORMATION; |
---|
1939 | } |
---|
1940 | if (check_typeofcertname(id_b->type, type) != 0) { |
---|
1941 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1942 | "ID type mismatched. ID: %s CERT: %s.\n", |
---|
1943 | s_ipsecdoi_ident(id_b->type), |
---|
1944 | s_ipsecdoi_ident(type)); |
---|
1945 | racoon_free(altname); |
---|
1946 | return ISAKMP_NTYPE_INVALID_ID_INFORMATION; |
---|
1947 | } |
---|
1948 | error = memcmp(id_b + 1, altname, idlen); |
---|
1949 | if (error) { |
---|
1950 | plog(LLV_ERROR, LOCATION, NULL, "ID mismatched.\n"); |
---|
1951 | plogdump(LLV_DEBUG, id_b + 1, idlen); |
---|
1952 | plogdump(LLV_DEBUG, altname, idlen); |
---|
1953 | racoon_free(altname); |
---|
1954 | return ISAKMP_NTYPE_INVALID_ID_INFORMATION; |
---|
1955 | } |
---|
1956 | racoon_free(altname); |
---|
1957 | return 0; |
---|
1958 | } |
---|
1959 | default: |
---|
1960 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1961 | "Inpropper ID type passed: %s.\n", |
---|
1962 | s_ipsecdoi_ident(id_b->type)); |
---|
1963 | return ISAKMP_NTYPE_INVALID_ID_INFORMATION; |
---|
1964 | } |
---|
1965 | /*NOTREACHED*/ |
---|
1966 | } |
---|
1967 | |
---|
1968 | static int |
---|
1969 | check_typeofcertname(doi, genid) |
---|
1970 | int doi, genid; |
---|
1971 | { |
---|
1972 | switch (doi) { |
---|
1973 | case IPSECDOI_ID_IPV4_ADDR: |
---|
1974 | case IPSECDOI_ID_IPV4_ADDR_SUBNET: |
---|
1975 | case IPSECDOI_ID_IPV6_ADDR: |
---|
1976 | case IPSECDOI_ID_IPV6_ADDR_SUBNET: |
---|
1977 | case IPSECDOI_ID_IPV4_ADDR_RANGE: |
---|
1978 | case IPSECDOI_ID_IPV6_ADDR_RANGE: |
---|
1979 | if (genid != GENT_IPADD) |
---|
1980 | return -1; |
---|
1981 | return 0; |
---|
1982 | case IPSECDOI_ID_FQDN: |
---|
1983 | if (genid != GENT_DNS) |
---|
1984 | return -1; |
---|
1985 | return 0; |
---|
1986 | case IPSECDOI_ID_USER_FQDN: |
---|
1987 | if (genid != GENT_EMAIL) |
---|
1988 | return -1; |
---|
1989 | return 0; |
---|
1990 | case IPSECDOI_ID_DER_ASN1_DN: /* should not be passed to this function*/ |
---|
1991 | case IPSECDOI_ID_DER_ASN1_GN: |
---|
1992 | case IPSECDOI_ID_KEY_ID: |
---|
1993 | default: |
---|
1994 | return -1; |
---|
1995 | } |
---|
1996 | /*NOTREACHED*/ |
---|
1997 | } |
---|
1998 | |
---|
1999 | /* |
---|
2000 | * save certificate including certificate type. |
---|
2001 | */ |
---|
2002 | int |
---|
2003 | oakley_savecert(iph1, gen) |
---|
2004 | struct ph1handle *iph1; |
---|
2005 | struct isakmp_gen *gen; |
---|
2006 | { |
---|
2007 | vchar_t **c; |
---|
2008 | u_int8_t type; |
---|
2009 | STACK_OF(X509) *certs=NULL; |
---|
2010 | PKCS7 *p7; |
---|
2011 | |
---|
2012 | type = *(u_int8_t *)(gen + 1) & 0xff; |
---|
2013 | |
---|
2014 | switch (type) { |
---|
2015 | case ISAKMP_CERT_DNS: |
---|
2016 | plog(LLV_WARNING, LOCATION, NULL, |
---|
2017 | "CERT payload is unnecessary in DNSSEC. " |
---|
2018 | "ignore this CERT payload.\n"); |
---|
2019 | return 0; |
---|
2020 | case ISAKMP_CERT_PKCS7: |
---|
2021 | case ISAKMP_CERT_PGP: |
---|
2022 | case ISAKMP_CERT_X509SIGN: |
---|
2023 | case ISAKMP_CERT_KERBEROS: |
---|
2024 | case ISAKMP_CERT_SPKI: |
---|
2025 | c = &iph1->cert_p; |
---|
2026 | break; |
---|
2027 | case ISAKMP_CERT_CRL: |
---|
2028 | c = &iph1->crl_p; |
---|
2029 | break; |
---|
2030 | case ISAKMP_CERT_X509KE: |
---|
2031 | case ISAKMP_CERT_X509ATTR: |
---|
2032 | case ISAKMP_CERT_ARL: |
---|
2033 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2034 | "No supported such CERT type %d\n", type); |
---|
2035 | return -1; |
---|
2036 | default: |
---|
2037 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2038 | "Invalid CERT type %d\n", type); |
---|
2039 | return -1; |
---|
2040 | } |
---|
2041 | |
---|
2042 | /* XXX choice the 1th cert, ignore after the cert. */ |
---|
2043 | /* XXX should be processed. */ |
---|
2044 | if (*c) { |
---|
2045 | plog(LLV_WARNING, LOCATION, NULL, |
---|
2046 | "ignore 2nd CERT payload.\n"); |
---|
2047 | return 0; |
---|
2048 | } |
---|
2049 | |
---|
2050 | if (type == ISAKMP_CERT_PKCS7) { |
---|
2051 | u_char *bp; |
---|
2052 | int i; |
---|
2053 | |
---|
2054 | /* Skip the header */ |
---|
2055 | bp = (u_char *)(gen + 1); |
---|
2056 | /* And the first byte is the certificate type, |
---|
2057 | * we know that already |
---|
2058 | */ |
---|
2059 | bp++; |
---|
2060 | p7 = d2i_PKCS7(NULL, (void *)&bp, |
---|
2061 | ntohs(gen->len) - sizeof(*gen) - 1); |
---|
2062 | |
---|
2063 | if (!p7) { |
---|
2064 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2065 | "Failed to parse PKCS#7 CERT.\n"); |
---|
2066 | return -1; |
---|
2067 | } |
---|
2068 | |
---|
2069 | /* Copied this from the openssl pkcs7 application; |
---|
2070 | * there"s little by way of documentation for any of |
---|
2071 | * it. I can only presume it"s correct. |
---|
2072 | */ |
---|
2073 | |
---|
2074 | i = OBJ_obj2nid(p7->type); |
---|
2075 | switch (i) { |
---|
2076 | case NID_pkcs7_signed: |
---|
2077 | certs=p7->d.sign->cert; |
---|
2078 | break; |
---|
2079 | case NID_pkcs7_signedAndEnveloped: |
---|
2080 | certs=p7->d.signed_and_enveloped->cert; |
---|
2081 | break; |
---|
2082 | default: |
---|
2083 | break; |
---|
2084 | } |
---|
2085 | |
---|
2086 | if (!certs) { |
---|
2087 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2088 | "CERT PKCS#7 bundle contains no certs.\n"); |
---|
2089 | PKCS7_free(p7); |
---|
2090 | return -1; |
---|
2091 | } |
---|
2092 | |
---|
2093 | for (i = 0; i < sk_X509_num(certs); i++) { |
---|
2094 | int len; |
---|
2095 | u_char *bp; |
---|
2096 | X509 *cert = sk_X509_value(certs,i); |
---|
2097 | |
---|
2098 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2099 | "Trying PKCS#7 cert %d.\n", i); |
---|
2100 | |
---|
2101 | /* We'll just try each cert in turn */ |
---|
2102 | *c = dump_x509(cert); |
---|
2103 | |
---|
2104 | if (!*c) { |
---|
2105 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2106 | "Failed to get CERT buffer.\n"); |
---|
2107 | continue; |
---|
2108 | } |
---|
2109 | |
---|
2110 | /* Ignore cert if it doesn't match identity |
---|
2111 | * XXX If verify cert is disabled, we still just take |
---|
2112 | * the first certificate.... |
---|
2113 | */ |
---|
2114 | if (oakley_check_certid(iph1)) { |
---|
2115 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2116 | "Discarding CERT: does not match ID.\n"); |
---|
2117 | vfree((*c)); |
---|
2118 | *c = NULL; |
---|
2119 | continue; |
---|
2120 | } |
---|
2121 | |
---|
2122 | { |
---|
2123 | char *p = eay_get_x509text(*c); |
---|
2124 | plog(LLV_DEBUG, LOCATION, NULL, "CERT saved:\n"); |
---|
2125 | plogdump(LLV_DEBUG, (*c)->v, (*c)->l); |
---|
2126 | plog(LLV_DEBUG, LOCATION, NULL, "%s", |
---|
2127 | p ? p : "\n"); |
---|
2128 | racoon_free(p); |
---|
2129 | } |
---|
2130 | break; |
---|
2131 | } |
---|
2132 | PKCS7_free(p7); |
---|
2133 | } else { |
---|
2134 | *c = dump_isakmp_payload(gen); |
---|
2135 | if (!*c) { |
---|
2136 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2137 | "Failed to get CERT buffer.\n"); |
---|
2138 | return -1; |
---|
2139 | } |
---|
2140 | |
---|
2141 | switch (type) { |
---|
2142 | case ISAKMP_CERT_PGP: |
---|
2143 | case ISAKMP_CERT_X509SIGN: |
---|
2144 | case ISAKMP_CERT_KERBEROS: |
---|
2145 | case ISAKMP_CERT_SPKI: |
---|
2146 | /* Ignore cert if it doesn't match identity |
---|
2147 | * XXX If verify cert is disabled, we still just take |
---|
2148 | * the first certificate.... |
---|
2149 | */ |
---|
2150 | if (oakley_check_certid(iph1)){ |
---|
2151 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2152 | "Discarding CERT: does not match ID.\n"); |
---|
2153 | vfree((*c)); |
---|
2154 | *c = NULL; |
---|
2155 | return 0; |
---|
2156 | } |
---|
2157 | |
---|
2158 | { |
---|
2159 | char *p = eay_get_x509text(*c); |
---|
2160 | plog(LLV_DEBUG, LOCATION, NULL, "CERT saved:\n"); |
---|
2161 | plogdump(LLV_DEBUG, (*c)->v, (*c)->l); |
---|
2162 | plog(LLV_DEBUG, LOCATION, NULL, "%s", p ? p : "\n"); |
---|
2163 | racoon_free(p); |
---|
2164 | } |
---|
2165 | break; |
---|
2166 | case ISAKMP_CERT_CRL: |
---|
2167 | plog(LLV_DEBUG, LOCATION, NULL, "CRL saved:\n"); |
---|
2168 | plogdump(LLV_DEBUG, (*c)->v, (*c)->l); |
---|
2169 | break; |
---|
2170 | case ISAKMP_CERT_X509KE: |
---|
2171 | case ISAKMP_CERT_X509ATTR: |
---|
2172 | case ISAKMP_CERT_ARL: |
---|
2173 | default: |
---|
2174 | /* XXX */ |
---|
2175 | vfree(*c); |
---|
2176 | *c = NULL; |
---|
2177 | return 0; |
---|
2178 | } |
---|
2179 | } |
---|
2180 | |
---|
2181 | return 0; |
---|
2182 | } |
---|
2183 | |
---|
2184 | /* |
---|
2185 | * save certificate including certificate type. |
---|
2186 | */ |
---|
2187 | int |
---|
2188 | oakley_savecr(iph1, gen) |
---|
2189 | struct ph1handle *iph1; |
---|
2190 | struct isakmp_gen *gen; |
---|
2191 | { |
---|
2192 | vchar_t *cert; |
---|
2193 | vchar_t **c; |
---|
2194 | u_int8_t type; |
---|
2195 | |
---|
2196 | type = *(u_int8_t *)(gen + 1) & 0xff; |
---|
2197 | switch (type) { |
---|
2198 | case ISAKMP_CERT_DNS: |
---|
2199 | plog(LLV_WARNING, LOCATION, NULL, |
---|
2200 | "CERT payload is unnecessary in DNSSEC\n"); |
---|
2201 | /*FALLTHRU*/ |
---|
2202 | case ISAKMP_CERT_PKCS7: |
---|
2203 | case ISAKMP_CERT_PGP: |
---|
2204 | case ISAKMP_CERT_X509SIGN: |
---|
2205 | case ISAKMP_CERT_KERBEROS: |
---|
2206 | case ISAKMP_CERT_SPKI: |
---|
2207 | c = &iph1->cr_p; |
---|
2208 | break; |
---|
2209 | case ISAKMP_CERT_X509KE: |
---|
2210 | case ISAKMP_CERT_X509ATTR: |
---|
2211 | case ISAKMP_CERT_ARL: |
---|
2212 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2213 | "No supported such CR type %d\n", type); |
---|
2214 | return -1; |
---|
2215 | case ISAKMP_CERT_CRL: |
---|
2216 | default: |
---|
2217 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2218 | "Invalid CR type %d\n", type); |
---|
2219 | return -1; |
---|
2220 | } |
---|
2221 | |
---|
2222 | /* Already found an acceptable CR? */ |
---|
2223 | if (*c != NULL) |
---|
2224 | return 0; |
---|
2225 | |
---|
2226 | cert = dump_isakmp_payload(gen); |
---|
2227 | if (cert == NULL) { |
---|
2228 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2229 | "Failed to get CR buffer.\n"); |
---|
2230 | return -1; |
---|
2231 | } |
---|
2232 | |
---|
2233 | plog(LLV_DEBUG, LOCATION, NULL, "CR received:\n"); |
---|
2234 | plogdump(LLV_DEBUG, cert->v, cert->l); |
---|
2235 | |
---|
2236 | *c = cert; |
---|
2237 | if (resolveph1rmconf(iph1) == 0) { |
---|
2238 | /* Found unique match */ |
---|
2239 | plog(LLV_DEBUG, LOCATION, NULL, "CR saved.\n"); |
---|
2240 | } else { |
---|
2241 | /* Still ambiguous or matches nothing, ignore this CR */ |
---|
2242 | *c = NULL; |
---|
2243 | vfree(cert); |
---|
2244 | } |
---|
2245 | return 0; |
---|
2246 | } |
---|
2247 | |
---|
2248 | /* |
---|
2249 | * Add a single CR. |
---|
2250 | */ |
---|
2251 | struct append_cr_ctx { |
---|
2252 | struct ph1handle *iph1; |
---|
2253 | struct payload_list *plist; |
---|
2254 | }; |
---|
2255 | |
---|
2256 | static int |
---|
2257 | oakley_append_rmconf_cr(rmconf, ctx) |
---|
2258 | struct remoteconf *rmconf; |
---|
2259 | void *ctx; |
---|
2260 | { |
---|
2261 | struct append_cr_ctx *actx = (struct append_cr_ctx *) ctx; |
---|
2262 | vchar_t *buf, *asn1dn = NULL; |
---|
2263 | int type; |
---|
2264 | |
---|
2265 | /* Do we want to send CR about this? */ |
---|
2266 | if (rmconf->send_cr == FALSE) |
---|
2267 | return 0; |
---|
2268 | |
---|
2269 | if (rmconf->peerscert != NULL) { |
---|
2270 | type = oakley_get_certtype(rmconf->peerscert); |
---|
2271 | asn1dn = eay_get_x509asn1issuername(rmconf->peerscert); |
---|
2272 | } else if (rmconf->cacert != NULL) { |
---|
2273 | type = oakley_get_certtype(rmconf->cacert); |
---|
2274 | asn1dn = eay_get_x509asn1subjectname(rmconf->cacert); |
---|
2275 | } else |
---|
2276 | return 0; |
---|
2277 | |
---|
2278 | if (asn1dn == NULL) { |
---|
2279 | plog(LLV_ERROR, LOCATION, actx->iph1->remote, |
---|
2280 | "Failed to get CR ASN1 DN from certificate\n"); |
---|
2281 | return 0; |
---|
2282 | } |
---|
2283 | |
---|
2284 | buf = vmalloc(1 + asn1dn->l); |
---|
2285 | if (buf == NULL) |
---|
2286 | goto err; |
---|
2287 | |
---|
2288 | buf->v[0] = type; |
---|
2289 | memcpy(&buf->v[1], asn1dn->v, asn1dn->l); |
---|
2290 | |
---|
2291 | plog(LLV_DEBUG, LOCATION, actx->iph1->remote, |
---|
2292 | "appending CR: %s\n", |
---|
2293 | s_isakmp_certtype(buf->v[0])); |
---|
2294 | plogdump(LLV_DEBUG, buf->v, buf->l); |
---|
2295 | |
---|
2296 | actx->plist = isakmp_plist_append_full(actx->plist, buf, ISAKMP_NPTYPE_CR, 1); |
---|
2297 | |
---|
2298 | err: |
---|
2299 | vfree(asn1dn); |
---|
2300 | return 0; |
---|
2301 | } |
---|
2302 | |
---|
2303 | /* |
---|
2304 | * Append list of acceptable CRs. |
---|
2305 | * RFC2048 3.10 |
---|
2306 | */ |
---|
2307 | struct payload_list * |
---|
2308 | oakley_append_cr(plist, iph1) |
---|
2309 | struct payload_list *plist; |
---|
2310 | struct ph1handle *iph1; |
---|
2311 | { |
---|
2312 | struct append_cr_ctx ctx; |
---|
2313 | struct rmconfselector sel; |
---|
2314 | |
---|
2315 | ctx.iph1 = iph1; |
---|
2316 | ctx.plist = plist; |
---|
2317 | if (iph1->rmconf == NULL) { |
---|
2318 | rmconf_selector_from_ph1(&sel, iph1); |
---|
2319 | enumrmconf(&sel, oakley_append_rmconf_cr, &ctx); |
---|
2320 | } else { |
---|
2321 | oakley_append_rmconf_cr(iph1->rmconf, &ctx); |
---|
2322 | } |
---|
2323 | |
---|
2324 | return ctx.plist; |
---|
2325 | } |
---|
2326 | |
---|
2327 | /* |
---|
2328 | * check peer's CR. |
---|
2329 | */ |
---|
2330 | int |
---|
2331 | oakley_checkcr(iph1) |
---|
2332 | struct ph1handle *iph1; |
---|
2333 | { |
---|
2334 | int type; |
---|
2335 | |
---|
2336 | if (iph1->cr_p == NULL) |
---|
2337 | return 0; |
---|
2338 | |
---|
2339 | plog(LLV_DEBUG, LOCATION, iph1->remote, |
---|
2340 | "peer transmitted CR: %s\n", |
---|
2341 | s_isakmp_certtype(oakley_get_certtype(iph1->cr_p))); |
---|
2342 | |
---|
2343 | type = oakley_get_certtype(iph1->cr_p); |
---|
2344 | if (type != oakley_get_certtype(iph1->rmconf->mycert)) { |
---|
2345 | plog(LLV_ERROR, LOCATION, iph1->remote, |
---|
2346 | "such a cert type isn't supported: %d\n", |
---|
2347 | type); |
---|
2348 | return -1; |
---|
2349 | } |
---|
2350 | |
---|
2351 | return 0; |
---|
2352 | } |
---|
2353 | |
---|
2354 | /* |
---|
2355 | * check to need CR payload. |
---|
2356 | */ |
---|
2357 | int |
---|
2358 | oakley_needcr(type) |
---|
2359 | int type; |
---|
2360 | { |
---|
2361 | switch (type) { |
---|
2362 | case OAKLEY_ATTR_AUTH_METHOD_DSSSIG: |
---|
2363 | case OAKLEY_ATTR_AUTH_METHOD_RSASIG: |
---|
2364 | #ifdef ENABLE_HYBRID |
---|
2365 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I: |
---|
2366 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I: |
---|
2367 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I: |
---|
2368 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R: |
---|
2369 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I: |
---|
2370 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R: |
---|
2371 | #endif |
---|
2372 | return 1; |
---|
2373 | default: |
---|
2374 | return 0; |
---|
2375 | } |
---|
2376 | /*NOTREACHED*/ |
---|
2377 | } |
---|
2378 | |
---|
2379 | /* |
---|
2380 | * compute SKEYID |
---|
2381 | * see seciton 5. Exchanges in RFC 2409 |
---|
2382 | * psk: SKEYID = prf(pre-shared-key, Ni_b | Nr_b) |
---|
2383 | * sig: SKEYID = prf(Ni_b | Nr_b, g^ir) |
---|
2384 | * enc: SKEYID = prf(H(Ni_b | Nr_b), CKY-I | CKY-R) |
---|
2385 | */ |
---|
2386 | int |
---|
2387 | oakley_skeyid(iph1) |
---|
2388 | struct ph1handle *iph1; |
---|
2389 | { |
---|
2390 | vchar_t *buf = NULL, *bp; |
---|
2391 | char *p; |
---|
2392 | int len; |
---|
2393 | int error = -1; |
---|
2394 | |
---|
2395 | /* SKEYID */ |
---|
2396 | switch (iph1->approval->authmethod) { |
---|
2397 | case OAKLEY_ATTR_AUTH_METHOD_PSKEY: |
---|
2398 | #ifdef ENABLE_HYBRID |
---|
2399 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_I: |
---|
2400 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_R: |
---|
2401 | #endif |
---|
2402 | if (iph1->etype != ISAKMP_ETYPE_IDENT) { |
---|
2403 | iph1->authstr = getpskbyname(iph1->id_p); |
---|
2404 | if (iph1->authstr == NULL) { |
---|
2405 | if (iph1->rmconf->verify_identifier) { |
---|
2406 | plog(LLV_ERROR, LOCATION, iph1->remote, |
---|
2407 | "couldn't find the pskey.\n"); |
---|
2408 | goto end; |
---|
2409 | } |
---|
2410 | plog(LLV_NOTIFY, LOCATION, iph1->remote, |
---|
2411 | "couldn't find the proper pskey, " |
---|
2412 | "try to get one by the peer's address.\n"); |
---|
2413 | } |
---|
2414 | } |
---|
2415 | if (iph1->authstr == NULL) { |
---|
2416 | /* |
---|
2417 | * If the exchange type is the main mode or if it's |
---|
2418 | * failed to get the psk by ID, racoon try to get |
---|
2419 | * the psk by remote IP address. |
---|
2420 | * It may be nonsense. |
---|
2421 | */ |
---|
2422 | iph1->authstr = getpskbyaddr(iph1->remote); |
---|
2423 | if (iph1->authstr == NULL) { |
---|
2424 | plog(LLV_ERROR, LOCATION, iph1->remote, |
---|
2425 | "couldn't find the pskey for %s.\n", |
---|
2426 | saddrwop2str(iph1->remote)); |
---|
2427 | goto end; |
---|
2428 | } |
---|
2429 | } |
---|
2430 | plog(LLV_DEBUG, LOCATION, NULL, "the psk found.\n"); |
---|
2431 | /* should be secret PSK */ |
---|
2432 | plog(LLV_DEBUG2, LOCATION, NULL, "psk: "); |
---|
2433 | plogdump(LLV_DEBUG2, iph1->authstr->v, iph1->authstr->l); |
---|
2434 | |
---|
2435 | len = iph1->nonce->l + iph1->nonce_p->l; |
---|
2436 | buf = vmalloc(len); |
---|
2437 | if (buf == NULL) { |
---|
2438 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2439 | "failed to get skeyid buffer\n"); |
---|
2440 | goto end; |
---|
2441 | } |
---|
2442 | p = buf->v; |
---|
2443 | |
---|
2444 | bp = (iph1->side == INITIATOR ? iph1->nonce : iph1->nonce_p); |
---|
2445 | plog(LLV_DEBUG, LOCATION, NULL, "nonce 1: "); |
---|
2446 | plogdump(LLV_DEBUG, bp->v, bp->l); |
---|
2447 | memcpy(p, bp->v, bp->l); |
---|
2448 | p += bp->l; |
---|
2449 | |
---|
2450 | bp = (iph1->side == INITIATOR ? iph1->nonce_p : iph1->nonce); |
---|
2451 | plog(LLV_DEBUG, LOCATION, NULL, "nonce 2: "); |
---|
2452 | plogdump(LLV_DEBUG, bp->v, bp->l); |
---|
2453 | memcpy(p, bp->v, bp->l); |
---|
2454 | p += bp->l; |
---|
2455 | |
---|
2456 | iph1->skeyid = oakley_prf(iph1->authstr, buf, iph1); |
---|
2457 | if (iph1->skeyid == NULL) |
---|
2458 | goto end; |
---|
2459 | break; |
---|
2460 | |
---|
2461 | case OAKLEY_ATTR_AUTH_METHOD_DSSSIG: |
---|
2462 | case OAKLEY_ATTR_AUTH_METHOD_RSASIG: |
---|
2463 | #ifdef ENABLE_HYBRID |
---|
2464 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I: |
---|
2465 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I: |
---|
2466 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R: |
---|
2467 | case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R: |
---|
2468 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I: |
---|
2469 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R: |
---|
2470 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I: |
---|
2471 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R: |
---|
2472 | #endif |
---|
2473 | #ifdef HAVE_GSSAPI |
---|
2474 | case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB: |
---|
2475 | #endif |
---|
2476 | len = iph1->nonce->l + iph1->nonce_p->l; |
---|
2477 | buf = vmalloc(len); |
---|
2478 | if (buf == NULL) { |
---|
2479 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2480 | "failed to get nonce buffer\n"); |
---|
2481 | goto end; |
---|
2482 | } |
---|
2483 | p = buf->v; |
---|
2484 | |
---|
2485 | bp = (iph1->side == INITIATOR ? iph1->nonce : iph1->nonce_p); |
---|
2486 | plog(LLV_DEBUG, LOCATION, NULL, "nonce1: "); |
---|
2487 | plogdump(LLV_DEBUG, bp->v, bp->l); |
---|
2488 | memcpy(p, bp->v, bp->l); |
---|
2489 | p += bp->l; |
---|
2490 | |
---|
2491 | bp = (iph1->side == INITIATOR ? iph1->nonce_p : iph1->nonce); |
---|
2492 | plog(LLV_DEBUG, LOCATION, NULL, "nonce2: "); |
---|
2493 | plogdump(LLV_DEBUG, bp->v, bp->l); |
---|
2494 | memcpy(p, bp->v, bp->l); |
---|
2495 | p += bp->l; |
---|
2496 | |
---|
2497 | iph1->skeyid = oakley_prf(buf, iph1->dhgxy, iph1); |
---|
2498 | if (iph1->skeyid == NULL) |
---|
2499 | goto end; |
---|
2500 | break; |
---|
2501 | case OAKLEY_ATTR_AUTH_METHOD_RSAENC: |
---|
2502 | case OAKLEY_ATTR_AUTH_METHOD_RSAREV: |
---|
2503 | #ifdef ENABLE_HYBRID |
---|
2504 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I: |
---|
2505 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_R: |
---|
2506 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I: |
---|
2507 | case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_R: |
---|
2508 | #endif |
---|
2509 | plog(LLV_WARNING, LOCATION, NULL, |
---|
2510 | "not supported authentication method %s\n", |
---|
2511 | s_oakley_attr_method(iph1->approval->authmethod)); |
---|
2512 | goto end; |
---|
2513 | default: |
---|
2514 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2515 | "invalid authentication method %d\n", |
---|
2516 | iph1->approval->authmethod); |
---|
2517 | goto end; |
---|
2518 | } |
---|
2519 | |
---|
2520 | plog(LLV_DEBUG, LOCATION, NULL, "SKEYID computed:\n"); |
---|
2521 | plogdump(LLV_DEBUG, iph1->skeyid->v, iph1->skeyid->l); |
---|
2522 | |
---|
2523 | error = 0; |
---|
2524 | |
---|
2525 | end: |
---|
2526 | if (buf != NULL) |
---|
2527 | vfree(buf); |
---|
2528 | return error; |
---|
2529 | } |
---|
2530 | |
---|
2531 | /* |
---|
2532 | * compute SKEYID_[dae] |
---|
2533 | * see seciton 5. Exchanges in RFC 2409 |
---|
2534 | * SKEYID_d = prf(SKEYID, g^ir | CKY-I | CKY-R | 0) |
---|
2535 | * SKEYID_a = prf(SKEYID, SKEYID_d | g^ir | CKY-I | CKY-R | 1) |
---|
2536 | * SKEYID_e = prf(SKEYID, SKEYID_a | g^ir | CKY-I | CKY-R | 2) |
---|
2537 | */ |
---|
2538 | int |
---|
2539 | oakley_skeyid_dae(iph1) |
---|
2540 | struct ph1handle *iph1; |
---|
2541 | { |
---|
2542 | vchar_t *buf = NULL; |
---|
2543 | char *p; |
---|
2544 | int len; |
---|
2545 | int error = -1; |
---|
2546 | |
---|
2547 | if (iph1->skeyid == NULL) { |
---|
2548 | plog(LLV_ERROR, LOCATION, NULL, "no SKEYID found.\n"); |
---|
2549 | goto end; |
---|
2550 | } |
---|
2551 | |
---|
2552 | /* SKEYID D */ |
---|
2553 | /* SKEYID_d = prf(SKEYID, g^xy | CKY-I | CKY-R | 0) */ |
---|
2554 | len = iph1->dhgxy->l + sizeof(cookie_t) * 2 + 1; |
---|
2555 | buf = vmalloc(len); |
---|
2556 | if (buf == NULL) { |
---|
2557 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2558 | "failed to get skeyid buffer\n"); |
---|
2559 | goto end; |
---|
2560 | } |
---|
2561 | p = buf->v; |
---|
2562 | |
---|
2563 | memcpy(p, iph1->dhgxy->v, iph1->dhgxy->l); |
---|
2564 | p += iph1->dhgxy->l; |
---|
2565 | memcpy(p, (caddr_t)&iph1->index.i_ck, sizeof(cookie_t)); |
---|
2566 | p += sizeof(cookie_t); |
---|
2567 | memcpy(p, (caddr_t)&iph1->index.r_ck, sizeof(cookie_t)); |
---|
2568 | p += sizeof(cookie_t); |
---|
2569 | *p = 0; |
---|
2570 | iph1->skeyid_d = oakley_prf(iph1->skeyid, buf, iph1); |
---|
2571 | if (iph1->skeyid_d == NULL) |
---|
2572 | goto end; |
---|
2573 | |
---|
2574 | vfree(buf); |
---|
2575 | buf = NULL; |
---|
2576 | |
---|
2577 | plog(LLV_DEBUG, LOCATION, NULL, "SKEYID_d computed:\n"); |
---|
2578 | plogdump(LLV_DEBUG, iph1->skeyid_d->v, iph1->skeyid_d->l); |
---|
2579 | |
---|
2580 | /* SKEYID A */ |
---|
2581 | /* SKEYID_a = prf(SKEYID, SKEYID_d | g^xy | CKY-I | CKY-R | 1) */ |
---|
2582 | len = iph1->skeyid_d->l + iph1->dhgxy->l + sizeof(cookie_t) * 2 + 1; |
---|
2583 | buf = vmalloc(len); |
---|
2584 | if (buf == NULL) { |
---|
2585 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2586 | "failed to get skeyid buffer\n"); |
---|
2587 | goto end; |
---|
2588 | } |
---|
2589 | p = buf->v; |
---|
2590 | memcpy(p, iph1->skeyid_d->v, iph1->skeyid_d->l); |
---|
2591 | p += iph1->skeyid_d->l; |
---|
2592 | memcpy(p, iph1->dhgxy->v, iph1->dhgxy->l); |
---|
2593 | p += iph1->dhgxy->l; |
---|
2594 | memcpy(p, (caddr_t)&iph1->index.i_ck, sizeof(cookie_t)); |
---|
2595 | p += sizeof(cookie_t); |
---|
2596 | memcpy(p, (caddr_t)&iph1->index.r_ck, sizeof(cookie_t)); |
---|
2597 | p += sizeof(cookie_t); |
---|
2598 | *p = 1; |
---|
2599 | iph1->skeyid_a = oakley_prf(iph1->skeyid, buf, iph1); |
---|
2600 | if (iph1->skeyid_a == NULL) |
---|
2601 | goto end; |
---|
2602 | |
---|
2603 | vfree(buf); |
---|
2604 | buf = NULL; |
---|
2605 | |
---|
2606 | plog(LLV_DEBUG, LOCATION, NULL, "SKEYID_a computed:\n"); |
---|
2607 | plogdump(LLV_DEBUG, iph1->skeyid_a->v, iph1->skeyid_a->l); |
---|
2608 | |
---|
2609 | /* SKEYID E */ |
---|
2610 | /* SKEYID_e = prf(SKEYID, SKEYID_a | g^xy | CKY-I | CKY-R | 2) */ |
---|
2611 | len = iph1->skeyid_a->l + iph1->dhgxy->l + sizeof(cookie_t) * 2 + 1; |
---|
2612 | buf = vmalloc(len); |
---|
2613 | if (buf == NULL) { |
---|
2614 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2615 | "failed to get skeyid buffer\n"); |
---|
2616 | goto end; |
---|
2617 | } |
---|
2618 | p = buf->v; |
---|
2619 | memcpy(p, iph1->skeyid_a->v, iph1->skeyid_a->l); |
---|
2620 | p += iph1->skeyid_a->l; |
---|
2621 | memcpy(p, iph1->dhgxy->v, iph1->dhgxy->l); |
---|
2622 | p += iph1->dhgxy->l; |
---|
2623 | memcpy(p, (caddr_t)&iph1->index.i_ck, sizeof(cookie_t)); |
---|
2624 | p += sizeof(cookie_t); |
---|
2625 | memcpy(p, (caddr_t)&iph1->index.r_ck, sizeof(cookie_t)); |
---|
2626 | p += sizeof(cookie_t); |
---|
2627 | *p = 2; |
---|
2628 | iph1->skeyid_e = oakley_prf(iph1->skeyid, buf, iph1); |
---|
2629 | if (iph1->skeyid_e == NULL) |
---|
2630 | goto end; |
---|
2631 | |
---|
2632 | vfree(buf); |
---|
2633 | buf = NULL; |
---|
2634 | |
---|
2635 | plog(LLV_DEBUG, LOCATION, NULL, "SKEYID_e computed:\n"); |
---|
2636 | plogdump(LLV_DEBUG, iph1->skeyid_e->v, iph1->skeyid_e->l); |
---|
2637 | |
---|
2638 | error = 0; |
---|
2639 | |
---|
2640 | end: |
---|
2641 | if (buf != NULL) |
---|
2642 | vfree(buf); |
---|
2643 | return error; |
---|
2644 | } |
---|
2645 | |
---|
2646 | /* |
---|
2647 | * compute final encryption key. |
---|
2648 | * see Appendix B. |
---|
2649 | */ |
---|
2650 | int |
---|
2651 | oakley_compute_enckey(iph1) |
---|
2652 | struct ph1handle *iph1; |
---|
2653 | { |
---|
2654 | u_int keylen, prflen; |
---|
2655 | int error = -1; |
---|
2656 | |
---|
2657 | /* RFC2409 p39 */ |
---|
2658 | keylen = alg_oakley_encdef_keylen(iph1->approval->enctype, |
---|
2659 | iph1->approval->encklen); |
---|
2660 | if (keylen == -1) { |
---|
2661 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2662 | "invalid encryption algorithm %d, " |
---|
2663 | "or invalid key length %d.\n", |
---|
2664 | iph1->approval->enctype, |
---|
2665 | iph1->approval->encklen); |
---|
2666 | goto end; |
---|
2667 | } |
---|
2668 | iph1->key = vmalloc(keylen >> 3); |
---|
2669 | if (iph1->key == NULL) { |
---|
2670 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2671 | "failed to get key buffer\n"); |
---|
2672 | goto end; |
---|
2673 | } |
---|
2674 | |
---|
2675 | /* set prf length */ |
---|
2676 | prflen = alg_oakley_hashdef_hashlen(iph1->approval->hashtype); |
---|
2677 | if (prflen == -1) { |
---|
2678 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2679 | "invalid hash type %d.\n", iph1->approval->hashtype); |
---|
2680 | goto end; |
---|
2681 | } |
---|
2682 | |
---|
2683 | /* see isakmp-oakley-08 5.3. */ |
---|
2684 | if (iph1->key->l <= iph1->skeyid_e->l) { |
---|
2685 | /* |
---|
2686 | * if length(Ka) <= length(SKEYID_e) |
---|
2687 | * Ka = first length(K) bit of SKEYID_e |
---|
2688 | */ |
---|
2689 | memcpy(iph1->key->v, iph1->skeyid_e->v, iph1->key->l); |
---|
2690 | } else { |
---|
2691 | vchar_t *buf = NULL, *res = NULL; |
---|
2692 | u_char *p, *ep; |
---|
2693 | int cplen; |
---|
2694 | int subkey; |
---|
2695 | |
---|
2696 | /* |
---|
2697 | * otherwise, |
---|
2698 | * Ka = K1 | K2 | K3 |
---|
2699 | * where |
---|
2700 | * K1 = prf(SKEYID_e, 0) |
---|
2701 | * K2 = prf(SKEYID_e, K1) |
---|
2702 | * K3 = prf(SKEYID_e, K2) |
---|
2703 | */ |
---|
2704 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2705 | "len(SKEYID_e) < len(Ka) (%zu < %zu), " |
---|
2706 | "generating long key (Ka = K1 | K2 | ...)\n", |
---|
2707 | iph1->skeyid_e->l, iph1->key->l); |
---|
2708 | |
---|
2709 | if ((buf = vmalloc(prflen >> 3)) == 0) { |
---|
2710 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2711 | "failed to get key buffer\n"); |
---|
2712 | goto end; |
---|
2713 | } |
---|
2714 | p = (u_char *)iph1->key->v; |
---|
2715 | ep = p + iph1->key->l; |
---|
2716 | |
---|
2717 | subkey = 1; |
---|
2718 | while (p < ep) { |
---|
2719 | if (p == (u_char *)iph1->key->v) { |
---|
2720 | /* just for computing K1 */ |
---|
2721 | buf->v[0] = 0; |
---|
2722 | buf->l = 1; |
---|
2723 | } |
---|
2724 | res = oakley_prf(iph1->skeyid_e, buf, iph1); |
---|
2725 | if (res == NULL) { |
---|
2726 | vfree(buf); |
---|
2727 | goto end; |
---|
2728 | } |
---|
2729 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2730 | "compute intermediate encryption key K%d\n", |
---|
2731 | subkey); |
---|
2732 | plogdump(LLV_DEBUG, buf->v, buf->l); |
---|
2733 | plogdump(LLV_DEBUG, res->v, res->l); |
---|
2734 | |
---|
2735 | cplen = (res->l < ep - p) ? res->l : ep - p; |
---|
2736 | memcpy(p, res->v, cplen); |
---|
2737 | p += cplen; |
---|
2738 | |
---|
2739 | buf->l = prflen >> 3; /* to cancel K1 speciality */ |
---|
2740 | if (res->l != buf->l) { |
---|
2741 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2742 | "internal error: res->l=%zu buf->l=%zu\n", |
---|
2743 | res->l, buf->l); |
---|
2744 | vfree(res); |
---|
2745 | vfree(buf); |
---|
2746 | goto end; |
---|
2747 | } |
---|
2748 | memcpy(buf->v, res->v, res->l); |
---|
2749 | vfree(res); |
---|
2750 | subkey++; |
---|
2751 | } |
---|
2752 | |
---|
2753 | vfree(buf); |
---|
2754 | } |
---|
2755 | |
---|
2756 | /* |
---|
2757 | * don't check any weak key or not. |
---|
2758 | * draft-ietf-ipsec-ike-01.txt Appendix B. |
---|
2759 | * draft-ietf-ipsec-ciph-aes-cbc-00.txt Section 2.3. |
---|
2760 | */ |
---|
2761 | #if 0 |
---|
2762 | /* weakkey check */ |
---|
2763 | if (iph1->approval->enctype > ARRAYLEN(oakley_encdef) |
---|
2764 | || oakley_encdef[iph1->approval->enctype].weakkey == NULL) { |
---|
2765 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2766 | "encryption algorithm %d isn't supported.\n", |
---|
2767 | iph1->approval->enctype); |
---|
2768 | goto end; |
---|
2769 | } |
---|
2770 | if ((oakley_encdef[iph1->approval->enctype].weakkey)(iph1->key)) { |
---|
2771 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2772 | "weakkey was generated.\n"); |
---|
2773 | goto end; |
---|
2774 | } |
---|
2775 | #endif |
---|
2776 | |
---|
2777 | plog(LLV_DEBUG, LOCATION, NULL, "final encryption key computed:\n"); |
---|
2778 | plogdump(LLV_DEBUG, iph1->key->v, iph1->key->l); |
---|
2779 | |
---|
2780 | error = 0; |
---|
2781 | |
---|
2782 | end: |
---|
2783 | return error; |
---|
2784 | } |
---|
2785 | |
---|
2786 | /* |
---|
2787 | * compute IV and set to ph1handle |
---|
2788 | * IV = hash(g^xi | g^xr) |
---|
2789 | * see 4.1 Phase 1 state in draft-ietf-ipsec-ike. |
---|
2790 | */ |
---|
2791 | int |
---|
2792 | oakley_newiv(iph1) |
---|
2793 | struct ph1handle *iph1; |
---|
2794 | { |
---|
2795 | struct isakmp_ivm *newivm = NULL; |
---|
2796 | vchar_t *buf = NULL, *bp; |
---|
2797 | char *p; |
---|
2798 | int len; |
---|
2799 | |
---|
2800 | /* create buffer */ |
---|
2801 | len = iph1->dhpub->l + iph1->dhpub_p->l; |
---|
2802 | buf = vmalloc(len); |
---|
2803 | if (buf == NULL) { |
---|
2804 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2805 | "failed to get iv buffer\n"); |
---|
2806 | return -1; |
---|
2807 | } |
---|
2808 | |
---|
2809 | p = buf->v; |
---|
2810 | |
---|
2811 | bp = (iph1->side == INITIATOR ? iph1->dhpub : iph1->dhpub_p); |
---|
2812 | memcpy(p, bp->v, bp->l); |
---|
2813 | p += bp->l; |
---|
2814 | |
---|
2815 | bp = (iph1->side == INITIATOR ? iph1->dhpub_p : iph1->dhpub); |
---|
2816 | memcpy(p, bp->v, bp->l); |
---|
2817 | p += bp->l; |
---|
2818 | |
---|
2819 | /* allocate IVm */ |
---|
2820 | newivm = racoon_calloc(1, sizeof(struct isakmp_ivm)); |
---|
2821 | if (newivm == NULL) { |
---|
2822 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2823 | "failed to get iv buffer\n"); |
---|
2824 | vfree(buf); |
---|
2825 | return -1; |
---|
2826 | } |
---|
2827 | |
---|
2828 | /* compute IV */ |
---|
2829 | newivm->iv = oakley_hash(buf, iph1); |
---|
2830 | if (newivm->iv == NULL) { |
---|
2831 | vfree(buf); |
---|
2832 | oakley_delivm(newivm); |
---|
2833 | return -1; |
---|
2834 | } |
---|
2835 | |
---|
2836 | /* adjust length of iv */ |
---|
2837 | newivm->iv->l = alg_oakley_encdef_blocklen(iph1->approval->enctype); |
---|
2838 | if (newivm->iv->l == -1) { |
---|
2839 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2840 | "invalid encryption algorithm %d.\n", |
---|
2841 | iph1->approval->enctype); |
---|
2842 | vfree(buf); |
---|
2843 | oakley_delivm(newivm); |
---|
2844 | return -1; |
---|
2845 | } |
---|
2846 | |
---|
2847 | /* create buffer to save iv */ |
---|
2848 | if ((newivm->ive = vdup(newivm->iv)) == NULL) { |
---|
2849 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2850 | "vdup (%s)\n", strerror(errno)); |
---|
2851 | vfree(buf); |
---|
2852 | oakley_delivm(newivm); |
---|
2853 | return -1; |
---|
2854 | } |
---|
2855 | |
---|
2856 | vfree(buf); |
---|
2857 | |
---|
2858 | plog(LLV_DEBUG, LOCATION, NULL, "IV computed:\n"); |
---|
2859 | plogdump(LLV_DEBUG, newivm->iv->v, newivm->iv->l); |
---|
2860 | |
---|
2861 | iph1->ivm = newivm; |
---|
2862 | |
---|
2863 | return 0; |
---|
2864 | } |
---|
2865 | |
---|
2866 | /* |
---|
2867 | * compute IV for the payload after phase 1. |
---|
2868 | * It's not limited for phase 2. |
---|
2869 | * if pahse 1 was encrypted. |
---|
2870 | * IV = hash(last CBC block of Phase 1 | M-ID) |
---|
2871 | * if phase 1 was not encrypted. |
---|
2872 | * IV = hash(phase 1 IV | M-ID) |
---|
2873 | * see 4.2 Phase 2 state in draft-ietf-ipsec-ike. |
---|
2874 | */ |
---|
2875 | struct isakmp_ivm * |
---|
2876 | oakley_newiv2(iph1, msgid) |
---|
2877 | struct ph1handle *iph1; |
---|
2878 | u_int32_t msgid; |
---|
2879 | { |
---|
2880 | struct isakmp_ivm *newivm = NULL; |
---|
2881 | vchar_t *buf = NULL; |
---|
2882 | char *p; |
---|
2883 | int len; |
---|
2884 | int error = -1; |
---|
2885 | |
---|
2886 | /* create buffer */ |
---|
2887 | len = iph1->ivm->iv->l + sizeof(msgid_t); |
---|
2888 | buf = vmalloc(len); |
---|
2889 | if (buf == NULL) { |
---|
2890 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2891 | "failed to get iv buffer\n"); |
---|
2892 | goto end; |
---|
2893 | } |
---|
2894 | |
---|
2895 | p = buf->v; |
---|
2896 | |
---|
2897 | memcpy(p, iph1->ivm->iv->v, iph1->ivm->iv->l); |
---|
2898 | p += iph1->ivm->iv->l; |
---|
2899 | |
---|
2900 | memcpy(p, &msgid, sizeof(msgid)); |
---|
2901 | |
---|
2902 | plog(LLV_DEBUG, LOCATION, NULL, "compute IV for phase2\n"); |
---|
2903 | plog(LLV_DEBUG, LOCATION, NULL, "phase1 last IV:\n"); |
---|
2904 | plogdump(LLV_DEBUG, buf->v, buf->l); |
---|
2905 | |
---|
2906 | /* allocate IVm */ |
---|
2907 | newivm = racoon_calloc(1, sizeof(struct isakmp_ivm)); |
---|
2908 | if (newivm == NULL) { |
---|
2909 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2910 | "failed to get iv buffer\n"); |
---|
2911 | goto end; |
---|
2912 | } |
---|
2913 | |
---|
2914 | /* compute IV */ |
---|
2915 | if ((newivm->iv = oakley_hash(buf, iph1)) == NULL) |
---|
2916 | goto end; |
---|
2917 | |
---|
2918 | /* adjust length of iv */ |
---|
2919 | newivm->iv->l = alg_oakley_encdef_blocklen(iph1->approval->enctype); |
---|
2920 | if (newivm->iv->l == -1) { |
---|
2921 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2922 | "invalid encryption algorithm %d.\n", |
---|
2923 | iph1->approval->enctype); |
---|
2924 | goto end; |
---|
2925 | } |
---|
2926 | |
---|
2927 | /* create buffer to save new iv */ |
---|
2928 | if ((newivm->ive = vdup(newivm->iv)) == NULL) { |
---|
2929 | plog(LLV_ERROR, LOCATION, NULL, "vdup (%s)\n", strerror(errno)); |
---|
2930 | goto end; |
---|
2931 | } |
---|
2932 | |
---|
2933 | error = 0; |
---|
2934 | |
---|
2935 | plog(LLV_DEBUG, LOCATION, NULL, "phase2 IV computed:\n"); |
---|
2936 | plogdump(LLV_DEBUG, newivm->iv->v, newivm->iv->l); |
---|
2937 | |
---|
2938 | end: |
---|
2939 | if (error && newivm != NULL){ |
---|
2940 | oakley_delivm(newivm); |
---|
2941 | newivm=NULL; |
---|
2942 | } |
---|
2943 | if (buf != NULL) |
---|
2944 | vfree(buf); |
---|
2945 | return newivm; |
---|
2946 | } |
---|
2947 | |
---|
2948 | void |
---|
2949 | oakley_delivm(ivm) |
---|
2950 | struct isakmp_ivm *ivm; |
---|
2951 | { |
---|
2952 | if (ivm == NULL) |
---|
2953 | return; |
---|
2954 | |
---|
2955 | if (ivm->iv != NULL) |
---|
2956 | vfree(ivm->iv); |
---|
2957 | if (ivm->ive != NULL) |
---|
2958 | vfree(ivm->ive); |
---|
2959 | racoon_free(ivm); |
---|
2960 | plog(LLV_DEBUG, LOCATION, NULL, "IV freed\n"); |
---|
2961 | |
---|
2962 | return; |
---|
2963 | } |
---|
2964 | |
---|
2965 | /* |
---|
2966 | * decrypt packet. |
---|
2967 | * save new iv and old iv. |
---|
2968 | */ |
---|
2969 | vchar_t * |
---|
2970 | oakley_do_decrypt(iph1, msg, ivdp, ivep) |
---|
2971 | struct ph1handle *iph1; |
---|
2972 | vchar_t *msg, *ivdp, *ivep; |
---|
2973 | { |
---|
2974 | vchar_t *buf = NULL, *new = NULL; |
---|
2975 | char *pl; |
---|
2976 | int len; |
---|
2977 | u_int8_t padlen; |
---|
2978 | int blen; |
---|
2979 | int error = -1; |
---|
2980 | |
---|
2981 | plog(LLV_DEBUG, LOCATION, NULL, "begin decryption.\n"); |
---|
2982 | |
---|
2983 | blen = alg_oakley_encdef_blocklen(iph1->approval->enctype); |
---|
2984 | if (blen == -1) { |
---|
2985 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2986 | "invalid encryption algorithm %d.\n", |
---|
2987 | iph1->approval->enctype); |
---|
2988 | goto end; |
---|
2989 | } |
---|
2990 | |
---|
2991 | /* save IV for next, but not sync. */ |
---|
2992 | memset(ivep->v, 0, ivep->l); |
---|
2993 | memcpy(ivep->v, (caddr_t)&msg->v[msg->l - blen], blen); |
---|
2994 | |
---|
2995 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2996 | "IV was saved for next processing:\n"); |
---|
2997 | plogdump(LLV_DEBUG, ivep->v, ivep->l); |
---|
2998 | |
---|
2999 | pl = msg->v + sizeof(struct isakmp); |
---|
3000 | |
---|
3001 | len = msg->l - sizeof(struct isakmp); |
---|
3002 | |
---|
3003 | /* create buffer */ |
---|
3004 | buf = vmalloc(len); |
---|
3005 | if (buf == NULL) { |
---|
3006 | plog(LLV_ERROR, LOCATION, NULL, |
---|
3007 | "failed to get buffer to decrypt.\n"); |
---|
3008 | goto end; |
---|
3009 | } |
---|
3010 | memcpy(buf->v, pl, len); |
---|
3011 | |
---|
3012 | /* do decrypt */ |
---|
3013 | new = alg_oakley_encdef_decrypt(iph1->approval->enctype, |
---|
3014 | buf, iph1->key, ivdp); |
---|
3015 | if (new == NULL || new->v == NULL || new->l == 0) { |
---|
3016 | plog(LLV_ERROR, LOCATION, NULL, |
---|
3017 | "decryption %d failed.\n", iph1->approval->enctype); |
---|
3018 | goto end; |
---|
3019 | } |
---|
3020 | plog(LLV_DEBUG, LOCATION, NULL, "with key:\n"); |
---|
3021 | plogdump(LLV_DEBUG, iph1->key->v, iph1->key->l); |
---|
3022 | |
---|
3023 | vfree(buf); |
---|
3024 | buf = NULL; |
---|
3025 | |
---|
3026 | plog(LLV_DEBUG, LOCATION, NULL, "decrypted payload by IV:\n"); |
---|
3027 | plogdump(LLV_DEBUG, ivdp->v, ivdp->l); |
---|
3028 | |
---|
3029 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
3030 | "decrypted payload, but not trimed.\n"); |
---|
3031 | plogdump(LLV_DEBUG, new->v, new->l); |
---|
3032 | |
---|
3033 | /* get padding length */ |
---|
3034 | if (lcconf->pad_excltail) |
---|
3035 | padlen = new->v[new->l - 1] + 1; |
---|
3036 | else |
---|
3037 | padlen = new->v[new->l - 1]; |
---|
3038 | plog(LLV_DEBUG, LOCATION, NULL, "padding len=%u\n", padlen); |
---|
3039 | |
---|
3040 | /* trim padding */ |
---|
3041 | if (lcconf->pad_strict) { |
---|
3042 | if (padlen > new->l) { |
---|
3043 | plog(LLV_ERROR, LOCATION, NULL, |
---|
3044 | "invalied padding len=%u, buflen=%zu.\n", |
---|
3045 | padlen, new->l); |
---|
3046 | plogdump(LLV_ERROR, new->v, new->l); |
---|
3047 | goto end; |
---|
3048 | } |
---|
3049 | new->l -= padlen; |
---|
3050 | plog(LLV_DEBUG, LOCATION, NULL, "trimmed padding\n"); |
---|
3051 | } else { |
---|
3052 | plog(LLV_DEBUG, LOCATION, NULL, "skip to trim padding.\n"); |
---|
3053 | } |
---|
3054 | |
---|
3055 | /* create new buffer */ |
---|
3056 | len = sizeof(struct isakmp) + new->l; |
---|
3057 | buf = vmalloc(len); |
---|
3058 | if (buf == NULL) { |
---|
3059 | plog(LLV_ERROR, LOCATION, NULL, |
---|
3060 | "failed to get buffer to decrypt.\n"); |
---|
3061 | goto end; |
---|
3062 | } |
---|
3063 | memcpy(buf->v, msg->v, sizeof(struct isakmp)); |
---|
3064 | memcpy(buf->v + sizeof(struct isakmp), new->v, new->l); |
---|
3065 | ((struct isakmp *)buf->v)->len = htonl(buf->l); |
---|
3066 | |
---|
3067 | plog(LLV_DEBUG, LOCATION, NULL, "decrypted.\n"); |
---|
3068 | plogdump(LLV_DEBUG, buf->v, buf->l); |
---|
3069 | |
---|
3070 | #ifdef HAVE_PRINT_ISAKMP_C |
---|
3071 | isakmp_printpacket(buf, iph1->remote, iph1->local, 1); |
---|
3072 | #endif |
---|
3073 | |
---|
3074 | error = 0; |
---|
3075 | |
---|
3076 | end: |
---|
3077 | if (error && buf != NULL) { |
---|
3078 | vfree(buf); |
---|
3079 | buf = NULL; |
---|
3080 | } |
---|
3081 | if (new != NULL) |
---|
3082 | vfree(new); |
---|
3083 | |
---|
3084 | return buf; |
---|
3085 | } |
---|
3086 | |
---|
3087 | /* |
---|
3088 | * encrypt packet. |
---|
3089 | */ |
---|
3090 | vchar_t * |
---|
3091 | oakley_do_encrypt(iph1, msg, ivep, ivp) |
---|
3092 | struct ph1handle *iph1; |
---|
3093 | vchar_t *msg, *ivep, *ivp; |
---|
3094 | { |
---|
3095 | vchar_t *buf = 0, *new = 0; |
---|
3096 | char *pl; |
---|
3097 | int len; |
---|
3098 | u_int padlen; |
---|
3099 | int blen; |
---|
3100 | int error = -1; |
---|
3101 | |
---|
3102 | plog(LLV_DEBUG, LOCATION, NULL, "begin encryption.\n"); |
---|
3103 | |
---|
3104 | /* set cbc block length */ |
---|
3105 | blen = alg_oakley_encdef_blocklen(iph1->approval->enctype); |
---|
3106 | if (blen == -1) { |
---|
3107 | plog(LLV_ERROR, LOCATION, NULL, |
---|
3108 | "invalid encryption algorithm %d.\n", |
---|
3109 | iph1->approval->enctype); |
---|
3110 | goto end; |
---|
3111 | } |
---|
3112 | |
---|
3113 | pl = msg->v + sizeof(struct isakmp); |
---|
3114 | len = msg->l - sizeof(struct isakmp); |
---|
3115 | |
---|
3116 | /* add padding */ |
---|
3117 | padlen = oakley_padlen(len, blen); |
---|
3118 | plog(LLV_DEBUG, LOCATION, NULL, "pad length = %u\n", padlen); |
---|
3119 | |
---|
3120 | /* create buffer */ |
---|
3121 | buf = vmalloc(len + padlen); |
---|
3122 | if (buf == NULL) { |
---|
3123 | plog(LLV_ERROR, LOCATION, NULL, |
---|
3124 | "failed to get buffer to encrypt.\n"); |
---|
3125 | goto end; |
---|
3126 | } |
---|
3127 | if (padlen) { |
---|
3128 | int i; |
---|
3129 | char *p = &buf->v[len]; |
---|
3130 | if (lcconf->pad_random) { |
---|
3131 | for (i = 0; i < padlen; i++) |
---|
3132 | *p++ = eay_random() & 0xff; |
---|
3133 | } |
---|
3134 | } |
---|
3135 | memcpy(buf->v, pl, len); |
---|
3136 | |
---|
3137 | /* make pad into tail */ |
---|
3138 | if (lcconf->pad_excltail) |
---|
3139 | buf->v[len + padlen - 1] = padlen - 1; |
---|
3140 | else |
---|
3141 | buf->v[len + padlen - 1] = padlen; |
---|
3142 | |
---|
3143 | plogdump(LLV_DEBUG, buf->v, buf->l); |
---|
3144 | |
---|
3145 | /* do encrypt */ |
---|
3146 | new = alg_oakley_encdef_encrypt(iph1->approval->enctype, |
---|
3147 | buf, iph1->key, ivep); |
---|
3148 | if (new == NULL) { |
---|
3149 | plog(LLV_ERROR, LOCATION, NULL, |
---|
3150 | "encryption %d failed.\n", iph1->approval->enctype); |
---|
3151 | goto end; |
---|
3152 | } |
---|
3153 | plog(LLV_DEBUG, LOCATION, NULL, "with key:\n"); |
---|
3154 | plogdump(LLV_DEBUG, iph1->key->v, iph1->key->l); |
---|
3155 | |
---|
3156 | vfree(buf); |
---|
3157 | buf = NULL; |
---|
3158 | |
---|
3159 | plog(LLV_DEBUG, LOCATION, NULL, "encrypted payload by IV:\n"); |
---|
3160 | plogdump(LLV_DEBUG, ivep->v, ivep->l); |
---|
3161 | |
---|
3162 | /* save IV for next */ |
---|
3163 | memset(ivp->v, 0, ivp->l); |
---|
3164 | memcpy(ivp->v, (caddr_t)&new->v[new->l - blen], blen); |
---|
3165 | |
---|
3166 | plog(LLV_DEBUG, LOCATION, NULL, "save IV for next:\n"); |
---|
3167 | plogdump(LLV_DEBUG, ivp->v, ivp->l); |
---|
3168 | |
---|
3169 | /* create new buffer */ |
---|
3170 | len = sizeof(struct isakmp) + new->l; |
---|
3171 | buf = vmalloc(len); |
---|
3172 | if (buf == NULL) { |
---|
3173 | plog(LLV_ERROR, LOCATION, NULL, |
---|
3174 | "failed to get buffer to encrypt.\n"); |
---|
3175 | goto end; |
---|
3176 | } |
---|
3177 | memcpy(buf->v, msg->v, sizeof(struct isakmp)); |
---|
3178 | memcpy(buf->v + sizeof(struct isakmp), new->v, new->l); |
---|
3179 | ((struct isakmp *)buf->v)->len = htonl(buf->l); |
---|
3180 | |
---|
3181 | error = 0; |
---|
3182 | |
---|
3183 | plog(LLV_DEBUG, LOCATION, NULL, "encrypted.\n"); |
---|
3184 | |
---|
3185 | end: |
---|
3186 | if (error && buf != NULL) { |
---|
3187 | vfree(buf); |
---|
3188 | buf = NULL; |
---|
3189 | } |
---|
3190 | if (new != NULL) |
---|
3191 | vfree(new); |
---|
3192 | |
---|
3193 | return buf; |
---|
3194 | } |
---|
3195 | |
---|
3196 | /* culculate padding length */ |
---|
3197 | static int |
---|
3198 | oakley_padlen(len, base) |
---|
3199 | int len, base; |
---|
3200 | { |
---|
3201 | int padlen; |
---|
3202 | |
---|
3203 | padlen = base - len % base; |
---|
3204 | |
---|
3205 | if (lcconf->pad_randomlen) |
---|
3206 | padlen += ((eay_random() % (lcconf->pad_maxsize + 1) + 1) * |
---|
3207 | base); |
---|
3208 | |
---|
3209 | return padlen; |
---|
3210 | } |
---|
3211 | |
---|