1 | #include <machine/rtems-bsd-user-space.h> |
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2 | #ifdef __rtems__ |
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3 | #include <machine/rtems-bsd-program.h> |
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4 | #include "rtems-bsd-racoon-namespace.h" |
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5 | #endif /* __rtems__ */ |
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6 | |
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7 | /* $NetBSD: isakmp_quick.c,v 1.29 2011/03/14 17:18:13 tteras Exp $ */ |
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8 | |
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9 | /* Id: isakmp_quick.c,v 1.29 2006/08/22 18:17:17 manubsd Exp */ |
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10 | |
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11 | /* |
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12 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
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13 | * All rights reserved. |
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14 | * |
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15 | * Redistribution and use in source and binary forms, with or without |
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16 | * modification, are permitted provided that the following conditions |
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17 | * are met: |
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18 | * 1. Redistributions of source code must retain the above copyright |
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19 | * notice, this list of conditions and the following disclaimer. |
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20 | * 2. Redistributions in binary form must reproduce the above copyright |
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21 | * notice, this list of conditions and the following disclaimer in the |
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22 | * documentation and/or other materials provided with the distribution. |
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23 | * 3. Neither the name of the project nor the names of its contributors |
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24 | * may be used to endorse or promote products derived from this software |
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25 | * without specific prior written permission. |
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26 | * |
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27 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
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28 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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29 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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30 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
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31 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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32 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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33 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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34 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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35 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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36 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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37 | * SUCH DAMAGE. |
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38 | */ |
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39 | |
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40 | #include "config.h" |
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41 | |
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42 | #include <sys/types.h> |
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43 | #include <sys/param.h> |
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44 | #include <sys/socket.h> |
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45 | |
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46 | #include <netinet/in.h> |
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47 | |
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48 | #include <stdlib.h> |
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49 | #include <stdio.h> |
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50 | #include <string.h> |
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51 | #include <errno.h> |
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52 | #if TIME_WITH_SYS_TIME |
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53 | # include <sys/time.h> |
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54 | # include <time.h> |
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55 | #else |
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56 | # if HAVE_SYS_TIME_H |
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57 | # include <sys/time.h> |
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58 | # else |
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59 | # include <time.h> |
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60 | # endif |
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61 | #endif |
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62 | |
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63 | #include PATH_IPSEC_H |
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64 | |
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65 | #include "var.h" |
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66 | #include "vmbuf.h" |
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67 | #include "schedule.h" |
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68 | #include "misc.h" |
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69 | #include "plog.h" |
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70 | #include "debug.h" |
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71 | |
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72 | #include "localconf.h" |
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73 | #include "remoteconf.h" |
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74 | #include "handler.h" |
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75 | #include "policy.h" |
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76 | #include "proposal.h" |
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77 | #include "isakmp_var.h" |
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78 | #include "isakmp.h" |
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79 | #include "isakmp_inf.h" |
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80 | #include "isakmp_quick.h" |
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81 | #include "oakley.h" |
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82 | #include "ipsec_doi.h" |
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83 | #include "crypto_openssl.h" |
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84 | #include "pfkey.h" |
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85 | #include "policy.h" |
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86 | #include "algorithm.h" |
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87 | #include "sockmisc.h" |
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88 | #include "proposal.h" |
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89 | #include "sainfo.h" |
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90 | #include "admin.h" |
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91 | #include "strnames.h" |
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92 | |
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93 | #ifdef ENABLE_HYBRID |
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94 | #include <resolv.h> |
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95 | #include "isakmp_xauth.h" |
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96 | #include "isakmp_cfg.h" |
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97 | #endif |
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98 | |
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99 | #ifdef ENABLE_NATT |
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100 | #include "nattraversal.h" |
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101 | #endif |
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102 | |
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103 | /* quick mode */ |
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104 | static vchar_t *quick_ir1mx __P((struct ph2handle *, vchar_t *, vchar_t *)); |
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105 | static int get_sainfo_r __P((struct ph2handle *)); |
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106 | static int get_proposal_r __P((struct ph2handle *)); |
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107 | static int ph2_recv_n __P((struct ph2handle *, struct isakmp_gen *)); |
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108 | static void quick_timeover_stub __P((struct sched *)); |
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109 | static void quick_timeover __P((struct ph2handle *)); |
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110 | |
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111 | /* called from scheduler */ |
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112 | static void |
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113 | quick_timeover_stub(p) |
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114 | struct sched *p; |
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115 | { |
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116 | quick_timeover(container_of(p, struct ph2handle, sce)); |
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117 | } |
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118 | |
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119 | static void |
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120 | quick_timeover(iph2) |
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121 | struct ph2handle *iph2; |
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122 | { |
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123 | plog(LLV_ERROR, LOCATION, NULL, |
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124 | "%s give up to get IPsec-SA due to time up to wait.\n", |
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125 | saddrwop2str(iph2->dst)); |
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126 | |
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127 | /* If initiator side, send error to kernel by SADB_ACQUIRE. */ |
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128 | if (iph2->side == INITIATOR) |
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129 | pk_sendeacquire(iph2); |
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130 | |
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131 | remph2(iph2); |
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132 | delph2(iph2); |
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133 | } |
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134 | |
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135 | /* %%% |
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136 | * Quick Mode |
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137 | */ |
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138 | /* |
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139 | * begin Quick Mode as initiator. send pfkey getspi message to kernel. |
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140 | */ |
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141 | int |
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142 | quick_i1prep(iph2, msg) |
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143 | struct ph2handle *iph2; |
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144 | vchar_t *msg; /* must be null pointer */ |
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145 | { |
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146 | int error = ISAKMP_INTERNAL_ERROR; |
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147 | |
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148 | /* validity check */ |
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149 | if (iph2->status != PHASE2ST_STATUS2) { |
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150 | plog(LLV_ERROR, LOCATION, NULL, |
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151 | "status mismatched %d.\n", iph2->status); |
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152 | goto end; |
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153 | } |
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154 | |
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155 | iph2->msgid = isakmp_newmsgid2(iph2->ph1); |
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156 | iph2->ivm = oakley_newiv2(iph2->ph1, iph2->msgid); |
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157 | if (iph2->ivm == NULL) |
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158 | return 0; |
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159 | |
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160 | iph2->status = PHASE2ST_GETSPISENT; |
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161 | |
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162 | /* don't anything if local test mode. */ |
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163 | if (f_local) { |
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164 | error = 0; |
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165 | goto end; |
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166 | } |
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167 | |
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168 | /* send getspi message */ |
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169 | if (pk_sendgetspi(iph2) < 0) |
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170 | goto end; |
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171 | |
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172 | plog(LLV_DEBUG, LOCATION, NULL, "pfkey getspi sent.\n"); |
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173 | |
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174 | sched_schedule(&iph2->sce, lcconf->wait_ph2complete, |
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175 | quick_timeover_stub); |
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176 | |
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177 | error = 0; |
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178 | |
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179 | end: |
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180 | return error; |
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181 | } |
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182 | |
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183 | /* |
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184 | * send to responder |
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185 | * HDR*, HASH(1), SA, Ni [, KE ] [, IDi2, IDr2 ] [, NAT-OAi, NAT-OAr ] |
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186 | */ |
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187 | int |
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188 | quick_i1send(iph2, msg) |
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189 | struct ph2handle *iph2; |
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190 | vchar_t *msg; /* must be null pointer */ |
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191 | { |
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192 | vchar_t *body = NULL; |
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193 | vchar_t *hash = NULL; |
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194 | struct isakmp_gen *gen; |
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195 | char *p; |
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196 | int tlen; |
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197 | int error = ISAKMP_INTERNAL_ERROR; |
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198 | int natoa = ISAKMP_NPTYPE_NONE; |
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199 | int pfsgroup, idci, idcr; |
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200 | int np; |
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201 | struct ipsecdoi_id_b *id, *id_p; |
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202 | #ifdef ENABLE_NATT |
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203 | vchar_t *nat_oai = NULL; |
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204 | vchar_t *nat_oar = NULL; |
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205 | #endif |
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206 | |
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207 | /* validity check */ |
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208 | if (msg != NULL) { |
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209 | plog(LLV_ERROR, LOCATION, NULL, |
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210 | "msg has to be NULL in this function.\n"); |
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211 | goto end; |
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212 | } |
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213 | if (iph2->status != PHASE2ST_GETSPIDONE) { |
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214 | plog(LLV_ERROR, LOCATION, NULL, |
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215 | "status mismatched %d.\n", iph2->status); |
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216 | goto end; |
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217 | } |
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218 | |
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219 | /* create SA payload for my proposal */ |
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220 | if (ipsecdoi_setph2proposal(iph2) < 0) |
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221 | goto end; |
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222 | |
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223 | /* generate NONCE value */ |
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224 | iph2->nonce = eay_set_random(iph2->ph1->rmconf->nonce_size); |
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225 | if (iph2->nonce == NULL) |
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226 | goto end; |
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227 | |
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228 | /* |
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229 | * DH value calculation is kicked out into cfparse.y. |
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230 | * because pfs group can not be negotiated, it's only to be checked |
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231 | * acceptable. |
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232 | */ |
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233 | /* generate KE value if need */ |
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234 | pfsgroup = iph2->proposal->pfs_group; |
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235 | if (pfsgroup) { |
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236 | /* DH group settting if PFS is required. */ |
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237 | if (oakley_setdhgroup(pfsgroup, &iph2->pfsgrp) < 0) { |
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238 | plog(LLV_ERROR, LOCATION, NULL, |
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239 | "failed to set DH value.\n"); |
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240 | goto end; |
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241 | } |
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242 | if (oakley_dh_generate(iph2->pfsgrp, |
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243 | &iph2->dhpub, &iph2->dhpriv) < 0) { |
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244 | goto end; |
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245 | } |
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246 | } |
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247 | |
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248 | /* generate ID value */ |
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249 | if (ipsecdoi_setid2(iph2) < 0) { |
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250 | plog(LLV_ERROR, LOCATION, NULL, |
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251 | "failed to get ID.\n"); |
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252 | goto end; |
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253 | } |
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254 | plog(LLV_DEBUG, LOCATION, NULL, "IDci:\n"); |
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255 | plogdump(LLV_DEBUG, iph2->id->v, iph2->id->l); |
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256 | plog(LLV_DEBUG, LOCATION, NULL, "IDcr:\n"); |
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257 | plogdump(LLV_DEBUG, iph2->id_p->v, iph2->id_p->l); |
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258 | |
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259 | /* |
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260 | * we do not attach IDci nor IDcr, under the following condition: |
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261 | * - all proposals are transport mode |
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262 | * - no MIP6 or proxy |
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263 | * - id payload suggests to encrypt all the traffic (no specific |
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264 | * protocol type) |
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265 | * - SA endpoints and IKE addresses for the nego are the same |
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266 | * (iph2->src/dst) |
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267 | */ |
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268 | id = (struct ipsecdoi_id_b *)iph2->id->v; |
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269 | id_p = (struct ipsecdoi_id_b *)iph2->id_p->v; |
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270 | if (id->proto_id == 0 && |
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271 | id_p->proto_id == 0 && |
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272 | iph2->ph1->rmconf->support_proxy == 0 && |
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273 | iph2->sa_src == NULL && iph2->sa_dst == NULL && |
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274 | ipsecdoi_transportmode(iph2->proposal)) { |
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275 | idci = idcr = 0; |
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276 | } else |
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277 | idci = idcr = 1; |
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278 | |
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279 | #ifdef ENABLE_NATT |
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280 | /* |
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281 | * RFC3947 5.2. if we propose UDP-Encapsulated-Transport |
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282 | * we should send NAT-OA |
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283 | */ |
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284 | if (ipsecdoi_transportmode(iph2->proposal) |
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285 | && (iph2->ph1->natt_flags & NAT_DETECTED)) { |
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286 | natoa = iph2->ph1->natt_options->payload_nat_oa; |
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287 | |
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288 | nat_oai = ipsecdoi_sockaddr2id(iph2->src, |
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289 | IPSECDOI_PREFIX_HOST, IPSEC_ULPROTO_ANY); |
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290 | nat_oar = ipsecdoi_sockaddr2id(iph2->dst, |
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291 | IPSECDOI_PREFIX_HOST, IPSEC_ULPROTO_ANY); |
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292 | |
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293 | if (nat_oai == NULL || nat_oar == NULL) { |
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294 | plog(LLV_ERROR, LOCATION, NULL, |
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295 | "failed to generate NAT-OA payload.\n"); |
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296 | goto end; |
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297 | } |
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298 | |
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299 | plog(LLV_DEBUG, LOCATION, NULL, "NAT-OAi:\n"); |
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300 | plogdump(LLV_DEBUG, nat_oai->v, nat_oai->l); |
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301 | plog(LLV_DEBUG, LOCATION, NULL, "NAT-OAr:\n"); |
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302 | plogdump(LLV_DEBUG, nat_oar->v, nat_oar->l); |
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303 | } else { |
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304 | natoa = ISAKMP_NPTYPE_NONE; |
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305 | } |
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306 | #endif |
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307 | |
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308 | /* create SA;NONCE payload, and KE if need, and IDii, IDir. */ |
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309 | tlen = + sizeof(*gen) + iph2->sa->l |
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310 | + sizeof(*gen) + iph2->nonce->l; |
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311 | if (pfsgroup) |
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312 | tlen += (sizeof(*gen) + iph2->dhpub->l); |
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313 | if (idci) |
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314 | tlen += sizeof(*gen) + iph2->id->l; |
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315 | if (idcr) |
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316 | tlen += sizeof(*gen) + iph2->id_p->l; |
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317 | #ifdef ENABLE_NATT |
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318 | if (natoa != ISAKMP_NPTYPE_NONE) |
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319 | tlen += 2 * sizeof(*gen) + nat_oai->l + nat_oar->l; |
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320 | #endif |
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321 | |
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322 | body = vmalloc(tlen); |
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323 | if (body == NULL) { |
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324 | plog(LLV_ERROR, LOCATION, NULL, |
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325 | "failed to get buffer to send.\n"); |
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326 | goto end; |
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327 | } |
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328 | |
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329 | p = body->v; |
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330 | |
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331 | /* add SA payload */ |
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332 | p = set_isakmp_payload(p, iph2->sa, ISAKMP_NPTYPE_NONCE); |
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333 | |
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334 | /* add NONCE payload */ |
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335 | if (pfsgroup) |
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336 | np = ISAKMP_NPTYPE_KE; |
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337 | else if (idci || idcr) |
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338 | np = ISAKMP_NPTYPE_ID; |
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339 | else |
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340 | np = natoa; |
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341 | p = set_isakmp_payload(p, iph2->nonce, np); |
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342 | |
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343 | /* add KE payload if need. */ |
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344 | np = (idci || idcr) ? ISAKMP_NPTYPE_ID : natoa; |
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345 | if (pfsgroup) |
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346 | p = set_isakmp_payload(p, iph2->dhpub, np); |
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347 | |
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348 | /* IDci */ |
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349 | np = (idcr) ? ISAKMP_NPTYPE_ID : natoa; |
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350 | if (idci) |
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351 | p = set_isakmp_payload(p, iph2->id, np); |
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352 | |
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353 | /* IDcr */ |
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354 | if (idcr) |
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355 | p = set_isakmp_payload(p, iph2->id_p, natoa); |
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356 | |
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357 | #ifdef ENABLE_NATT |
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358 | /* NAT-OA */ |
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359 | if (natoa != ISAKMP_NPTYPE_NONE) { |
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360 | p = set_isakmp_payload(p, nat_oai, natoa); |
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361 | p = set_isakmp_payload(p, nat_oar, ISAKMP_NPTYPE_NONE); |
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362 | } |
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363 | #endif |
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364 | |
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365 | /* generate HASH(1) */ |
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366 | hash = oakley_compute_hash1(iph2->ph1, iph2->msgid, body); |
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367 | if (hash == NULL) |
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368 | goto end; |
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369 | |
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370 | /* send isakmp payload */ |
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371 | iph2->sendbuf = quick_ir1mx(iph2, body, hash); |
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372 | if (iph2->sendbuf == NULL) |
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373 | goto end; |
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374 | |
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375 | /* send the packet, add to the schedule to resend */ |
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376 | if (isakmp_ph2send(iph2) == -1) |
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377 | goto end; |
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378 | |
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379 | /* change status of isakmp status entry */ |
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380 | iph2->status = PHASE2ST_MSG1SENT; |
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381 | |
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382 | error = 0; |
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383 | |
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384 | end: |
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385 | if (body != NULL) |
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386 | vfree(body); |
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387 | if (hash != NULL) |
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388 | vfree(hash); |
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389 | #ifdef ENABLE_NATT |
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390 | if (nat_oai != NULL) |
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391 | vfree(nat_oai); |
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392 | if (nat_oar != NULL) |
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393 | vfree(nat_oar); |
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394 | #endif |
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395 | |
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396 | return error; |
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397 | } |
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398 | |
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399 | /* |
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400 | * receive from responder |
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401 | * HDR*, HASH(2), SA, Nr [, KE ] [, IDi2, IDr2 ] [, NAT-OAi, NAT-OAr ] |
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402 | */ |
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403 | int |
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404 | quick_i2recv(iph2, msg0) |
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405 | struct ph2handle *iph2; |
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406 | vchar_t *msg0; |
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407 | { |
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408 | vchar_t *msg = NULL; |
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409 | vchar_t *hbuf = NULL; /* for hash computing. */ |
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410 | vchar_t *pbuf = NULL; /* for payload parsing */ |
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411 | vchar_t *idci = NULL; |
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412 | vchar_t *idcr = NULL; |
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413 | struct isakmp_parse_t *pa; |
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414 | struct isakmp *isakmp = (struct isakmp *)msg0->v; |
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415 | struct isakmp_pl_hash *hash = NULL; |
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416 | char *p; |
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417 | int tlen; |
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418 | int error = ISAKMP_INTERNAL_ERROR; |
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419 | |
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420 | /* validity check */ |
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421 | if (iph2->status != PHASE2ST_MSG1SENT) { |
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422 | plog(LLV_ERROR, LOCATION, NULL, |
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423 | "status mismatched %d.\n", iph2->status); |
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424 | goto end; |
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425 | } |
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426 | |
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427 | /* decrypt packet */ |
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428 | if (!ISSET(((struct isakmp *)msg0->v)->flags, ISAKMP_FLAG_E)) { |
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429 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
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430 | "Packet wasn't encrypted.\n"); |
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431 | goto end; |
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432 | } |
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433 | msg = oakley_do_decrypt(iph2->ph1, msg0, iph2->ivm->iv, iph2->ivm->ive); |
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434 | if (msg == NULL) |
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435 | goto end; |
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436 | |
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437 | /* create buffer for validating HASH(2) */ |
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438 | /* |
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439 | * ordering rule: |
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440 | * 1. the first one must be HASH |
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441 | * 2. the second one must be SA (added in isakmp-oakley-05!) |
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442 | * 3. two IDs must be considered as IDci, then IDcr |
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443 | */ |
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444 | pbuf = isakmp_parse(msg); |
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445 | if (pbuf == NULL) |
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446 | goto end; |
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447 | pa = (struct isakmp_parse_t *)pbuf->v; |
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448 | |
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449 | /* HASH payload is fixed postion */ |
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450 | if (pa->type != ISAKMP_NPTYPE_HASH) { |
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451 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
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452 | "received invalid next payload type %d, " |
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453 | "expecting %d.\n", |
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454 | pa->type, ISAKMP_NPTYPE_HASH); |
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455 | goto end; |
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456 | } |
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457 | hash = (struct isakmp_pl_hash *)pa->ptr; |
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458 | pa++; |
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459 | |
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460 | /* |
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461 | * this restriction was introduced in isakmp-oakley-05. |
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462 | * we do not check this for backward compatibility. |
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463 | * TODO: command line/config file option to enable/disable this code |
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464 | */ |
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465 | /* HASH payload is fixed postion */ |
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466 | if (pa->type != ISAKMP_NPTYPE_SA) { |
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467 | plog(LLV_WARNING, LOCATION, iph2->ph1->remote, |
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468 | "received invalid next payload type %d, " |
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469 | "expecting %d.\n", |
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470 | pa->type, ISAKMP_NPTYPE_HASH); |
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471 | } |
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472 | |
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473 | /* allocate buffer for computing HASH(2) */ |
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474 | tlen = iph2->nonce->l |
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475 | + ntohl(isakmp->len) - sizeof(*isakmp); |
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476 | hbuf = vmalloc(tlen); |
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477 | if (hbuf == NULL) { |
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478 | plog(LLV_ERROR, LOCATION, NULL, |
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479 | "failed to get hash buffer.\n"); |
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480 | goto end; |
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481 | } |
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482 | p = hbuf->v + iph2->nonce->l; /* retain the space for Ni_b */ |
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483 | |
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484 | /* |
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485 | * parse the payloads. |
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486 | * copy non-HASH payloads into hbuf, so that we can validate HASH. |
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487 | */ |
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488 | iph2->sa_ret = NULL; |
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489 | tlen = 0; /* count payload length except of HASH payload. */ |
---|
490 | for (; pa->type; pa++) { |
---|
491 | |
---|
492 | /* copy to buffer for HASH */ |
---|
493 | /* Don't modify the payload */ |
---|
494 | memcpy(p, pa->ptr, pa->len); |
---|
495 | |
---|
496 | switch (pa->type) { |
---|
497 | case ISAKMP_NPTYPE_SA: |
---|
498 | if (iph2->sa_ret != NULL) { |
---|
499 | plog(LLV_ERROR, LOCATION, NULL, |
---|
500 | "Ignored, multiple SA " |
---|
501 | "isn't supported.\n"); |
---|
502 | break; |
---|
503 | } |
---|
504 | if (isakmp_p2ph(&iph2->sa_ret, pa->ptr) < 0) { |
---|
505 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
506 | "duplicate ISAKMP_NPTYPE_SA.\n"); |
---|
507 | goto end; |
---|
508 | } |
---|
509 | break; |
---|
510 | |
---|
511 | case ISAKMP_NPTYPE_NONCE: |
---|
512 | if (isakmp_p2ph(&iph2->nonce_p, pa->ptr) < 0) { |
---|
513 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
514 | "duplicate ISAKMP_NPTYPE_NONCE.\n"); |
---|
515 | goto end; |
---|
516 | } |
---|
517 | break; |
---|
518 | |
---|
519 | case ISAKMP_NPTYPE_KE: |
---|
520 | if (isakmp_p2ph(&iph2->dhpub_p, pa->ptr) < 0) { |
---|
521 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
522 | "duplicate ISAKMP_NPTYPE_KE.\n"); |
---|
523 | goto end; |
---|
524 | } |
---|
525 | break; |
---|
526 | |
---|
527 | case ISAKMP_NPTYPE_ID: |
---|
528 | if (idci == NULL) { |
---|
529 | if (isakmp_p2ph(&idci, pa->ptr) < 0) |
---|
530 | goto end; |
---|
531 | } else if (idcr == NULL) { |
---|
532 | if (isakmp_p2ph(&idcr, pa->ptr) < 0) |
---|
533 | goto end; |
---|
534 | } else { |
---|
535 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
536 | "too many ISAKMP_NPTYPE_ID payloads.\n"); |
---|
537 | goto end; |
---|
538 | } |
---|
539 | break; |
---|
540 | |
---|
541 | case ISAKMP_NPTYPE_N: |
---|
542 | ph2_recv_n(iph2, pa->ptr); |
---|
543 | break; |
---|
544 | |
---|
545 | #ifdef ENABLE_NATT |
---|
546 | case ISAKMP_NPTYPE_NATOA_DRAFT: |
---|
547 | case ISAKMP_NPTYPE_NATOA_RFC: |
---|
548 | { |
---|
549 | struct sockaddr_storage addr; |
---|
550 | struct sockaddr *daddr; |
---|
551 | u_int8_t prefix; |
---|
552 | u_int16_t ul_proto; |
---|
553 | vchar_t *vp = NULL; |
---|
554 | |
---|
555 | if (isakmp_p2ph(&vp, pa->ptr) < 0) |
---|
556 | goto end; |
---|
557 | |
---|
558 | error = ipsecdoi_id2sockaddr(vp, |
---|
559 | (struct sockaddr *) &addr, |
---|
560 | &prefix, &ul_proto); |
---|
561 | |
---|
562 | vfree(vp); |
---|
563 | |
---|
564 | if (error) |
---|
565 | goto end; |
---|
566 | |
---|
567 | daddr = dupsaddr((struct sockaddr *) &addr); |
---|
568 | if (daddr == NULL) |
---|
569 | goto end; |
---|
570 | |
---|
571 | if (iph2->natoa_src == NULL) |
---|
572 | iph2->natoa_src = daddr; |
---|
573 | else if (iph2->natoa_dst == NULL) |
---|
574 | iph2->natoa_dst = daddr; |
---|
575 | else { |
---|
576 | racoon_free(daddr); |
---|
577 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
578 | "too many ISAKMP_NPTYPE_NATOA payloads.\n"); |
---|
579 | goto end; |
---|
580 | } |
---|
581 | } |
---|
582 | break; |
---|
583 | #endif |
---|
584 | |
---|
585 | default: |
---|
586 | /* don't send information, see ident_r1recv() */ |
---|
587 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
588 | "ignore the packet, " |
---|
589 | "received unexpecting payload type %d.\n", |
---|
590 | pa->type); |
---|
591 | goto end; |
---|
592 | } |
---|
593 | |
---|
594 | p += pa->len; |
---|
595 | |
---|
596 | /* compute true length of payload. */ |
---|
597 | tlen += pa->len; |
---|
598 | } |
---|
599 | |
---|
600 | /* payload existency check */ |
---|
601 | if (hash == NULL || iph2->sa_ret == NULL || iph2->nonce_p == NULL) { |
---|
602 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
603 | "few isakmp message received.\n"); |
---|
604 | goto end; |
---|
605 | } |
---|
606 | |
---|
607 | /* identity check */ |
---|
608 | if (idci != NULL) { |
---|
609 | struct sockaddr_storage proposed_addr, got_addr; |
---|
610 | u_int8_t proposed_prefix, got_prefix; |
---|
611 | u_int16_t proposed_ulproto, got_ulproto; |
---|
612 | |
---|
613 | error = ipsecdoi_id2sockaddr(iph2->id, |
---|
614 | (struct sockaddr *) &proposed_addr, |
---|
615 | &proposed_prefix, &proposed_ulproto); |
---|
616 | if (error) |
---|
617 | goto end; |
---|
618 | |
---|
619 | error = ipsecdoi_id2sockaddr(idci, |
---|
620 | (struct sockaddr *) &got_addr, |
---|
621 | &got_prefix, &got_ulproto); |
---|
622 | if (error) |
---|
623 | goto end; |
---|
624 | |
---|
625 | if (proposed_prefix != got_prefix |
---|
626 | || proposed_ulproto != got_ulproto) { |
---|
627 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
628 | "IDci prefix/ulproto does not match proposal.\n"); |
---|
629 | error = ISAKMP_NTYPE_ATTRIBUTES_NOT_SUPPORTED; |
---|
630 | goto end; |
---|
631 | } |
---|
632 | #ifdef ENABLE_NATT |
---|
633 | set_port(iph2->natoa_src, |
---|
634 | extract_port((struct sockaddr *) &proposed_addr)); |
---|
635 | #endif |
---|
636 | |
---|
637 | if (cmpsaddr((struct sockaddr *) &proposed_addr, |
---|
638 | (struct sockaddr *) &got_addr) == CMPSADDR_MATCH) { |
---|
639 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
640 | "IDci matches proposal.\n"); |
---|
641 | #ifdef ENABLE_NATT |
---|
642 | } else if (iph2->natoa_src != NULL |
---|
643 | && cmpsaddr(iph2->natoa_src, |
---|
644 | (struct sockaddr *) &got_addr) == 0) { |
---|
645 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
646 | "IDci matches NAT-OAi.\n"); |
---|
647 | #endif |
---|
648 | } else { |
---|
649 | plog(LLV_ERROR, LOCATION, NULL, |
---|
650 | "mismatched IDci was returned.\n"); |
---|
651 | error = ISAKMP_NTYPE_ATTRIBUTES_NOT_SUPPORTED; |
---|
652 | goto end; |
---|
653 | } |
---|
654 | } |
---|
655 | if (idcr != NULL) { |
---|
656 | struct sockaddr_storage proposed_addr, got_addr; |
---|
657 | u_int8_t proposed_prefix, got_prefix; |
---|
658 | u_int16_t proposed_ulproto, got_ulproto; |
---|
659 | |
---|
660 | error = ipsecdoi_id2sockaddr(iph2->id_p, |
---|
661 | (struct sockaddr *) &proposed_addr, |
---|
662 | &proposed_prefix, &proposed_ulproto); |
---|
663 | if (error) |
---|
664 | goto end; |
---|
665 | |
---|
666 | error = ipsecdoi_id2sockaddr(idcr, |
---|
667 | (struct sockaddr *) &got_addr, |
---|
668 | &got_prefix, &got_ulproto); |
---|
669 | if (error) |
---|
670 | goto end; |
---|
671 | |
---|
672 | if (proposed_prefix != got_prefix |
---|
673 | || proposed_ulproto != got_ulproto) { |
---|
674 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
675 | "IDcr prefix/ulproto does not match proposal.\n"); |
---|
676 | error = ISAKMP_NTYPE_ATTRIBUTES_NOT_SUPPORTED; |
---|
677 | goto end; |
---|
678 | } |
---|
679 | |
---|
680 | #ifdef ENABLE_NATT |
---|
681 | set_port(iph2->natoa_dst, |
---|
682 | extract_port((struct sockaddr *) &proposed_addr)); |
---|
683 | #endif |
---|
684 | |
---|
685 | if (cmpsaddr((struct sockaddr *) &proposed_addr, |
---|
686 | (struct sockaddr *) &got_addr) == CMPSADDR_MATCH) { |
---|
687 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
688 | "IDcr matches proposal.\n"); |
---|
689 | #ifdef ENABLE_NATT |
---|
690 | } else if (iph2->natoa_dst != NULL |
---|
691 | && cmpsaddr(iph2->natoa_dst, |
---|
692 | (struct sockaddr *) &got_addr) == CMPSADDR_MATCH) { |
---|
693 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
694 | "IDcr matches NAT-OAr.\n"); |
---|
695 | #endif |
---|
696 | } else { |
---|
697 | plog(LLV_ERROR, LOCATION, NULL, |
---|
698 | "mismatched IDcr was returned.\n"); |
---|
699 | error = ISAKMP_NTYPE_ATTRIBUTES_NOT_SUPPORTED; |
---|
700 | goto end; |
---|
701 | } |
---|
702 | } |
---|
703 | |
---|
704 | /* Fixed buffer for calculating HASH */ |
---|
705 | memcpy(hbuf->v, iph2->nonce->v, iph2->nonce->l); |
---|
706 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
707 | "HASH allocated:hbuf->l=%zu actual:tlen=%zu\n", |
---|
708 | hbuf->l, tlen + iph2->nonce->l); |
---|
709 | /* adjust buffer length for HASH */ |
---|
710 | hbuf->l = iph2->nonce->l + tlen; |
---|
711 | |
---|
712 | /* validate HASH(2) */ |
---|
713 | { |
---|
714 | char *r_hash; |
---|
715 | vchar_t *my_hash = NULL; |
---|
716 | int result; |
---|
717 | |
---|
718 | r_hash = (char *)hash + sizeof(*hash); |
---|
719 | |
---|
720 | plog(LLV_DEBUG, LOCATION, NULL, "HASH(2) received:"); |
---|
721 | plogdump(LLV_DEBUG, r_hash, ntohs(hash->h.len) - sizeof(*hash)); |
---|
722 | |
---|
723 | my_hash = oakley_compute_hash1(iph2->ph1, iph2->msgid, hbuf); |
---|
724 | if (my_hash == NULL) |
---|
725 | goto end; |
---|
726 | |
---|
727 | result = memcmp(my_hash->v, r_hash, my_hash->l); |
---|
728 | vfree(my_hash); |
---|
729 | |
---|
730 | if (result) { |
---|
731 | plog(LLV_DEBUG, LOCATION, iph2->ph1->remote, |
---|
732 | "HASH(2) mismatch.\n"); |
---|
733 | error = ISAKMP_NTYPE_INVALID_HASH_INFORMATION; |
---|
734 | goto end; |
---|
735 | } |
---|
736 | } |
---|
737 | |
---|
738 | /* validity check SA payload sent from responder */ |
---|
739 | if (ipsecdoi_checkph2proposal(iph2) < 0) { |
---|
740 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
741 | "proposal check failed.\n"); |
---|
742 | error = ISAKMP_NTYPE_NO_PROPOSAL_CHOSEN; |
---|
743 | goto end; |
---|
744 | } |
---|
745 | |
---|
746 | /* change status of isakmp status entry */ |
---|
747 | iph2->status = PHASE2ST_STATUS6; |
---|
748 | |
---|
749 | error = 0; |
---|
750 | |
---|
751 | end: |
---|
752 | if (hbuf) |
---|
753 | vfree(hbuf); |
---|
754 | if (pbuf) |
---|
755 | vfree(pbuf); |
---|
756 | if (msg) |
---|
757 | vfree(msg); |
---|
758 | if (idci) |
---|
759 | vfree(idci); |
---|
760 | if (idcr) |
---|
761 | vfree(idcr); |
---|
762 | |
---|
763 | if (error) { |
---|
764 | VPTRINIT(iph2->sa_ret); |
---|
765 | VPTRINIT(iph2->nonce_p); |
---|
766 | VPTRINIT(iph2->dhpub_p); |
---|
767 | VPTRINIT(iph2->id); |
---|
768 | VPTRINIT(iph2->id_p); |
---|
769 | #ifdef ENABLE_NATT |
---|
770 | if (iph2->natoa_src) { |
---|
771 | racoon_free(iph2->natoa_src); |
---|
772 | iph2->natoa_src = NULL; |
---|
773 | } |
---|
774 | if (iph2->natoa_dst) { |
---|
775 | racoon_free(iph2->natoa_dst); |
---|
776 | iph2->natoa_dst = NULL; |
---|
777 | } |
---|
778 | #endif |
---|
779 | } |
---|
780 | |
---|
781 | return error; |
---|
782 | } |
---|
783 | |
---|
784 | /* |
---|
785 | * send to responder |
---|
786 | * HDR*, HASH(3) |
---|
787 | */ |
---|
788 | int |
---|
789 | quick_i2send(iph2, msg0) |
---|
790 | struct ph2handle *iph2; |
---|
791 | vchar_t *msg0; |
---|
792 | { |
---|
793 | vchar_t *msg = NULL; |
---|
794 | vchar_t *buf = NULL; |
---|
795 | vchar_t *hash = NULL; |
---|
796 | char *p = NULL; |
---|
797 | int tlen; |
---|
798 | int error = ISAKMP_INTERNAL_ERROR; |
---|
799 | |
---|
800 | /* validity check */ |
---|
801 | if (iph2->status != PHASE2ST_STATUS6) { |
---|
802 | plog(LLV_ERROR, LOCATION, NULL, |
---|
803 | "status mismatched %d.\n", iph2->status); |
---|
804 | goto end; |
---|
805 | } |
---|
806 | |
---|
807 | /* generate HASH(3) */ |
---|
808 | { |
---|
809 | vchar_t *tmp = NULL; |
---|
810 | |
---|
811 | plog(LLV_DEBUG, LOCATION, NULL, "HASH(3) generate\n"); |
---|
812 | |
---|
813 | tmp = vmalloc(iph2->nonce->l + iph2->nonce_p->l); |
---|
814 | if (tmp == NULL) { |
---|
815 | plog(LLV_ERROR, LOCATION, NULL, |
---|
816 | "failed to get hash buffer.\n"); |
---|
817 | goto end; |
---|
818 | } |
---|
819 | memcpy(tmp->v, iph2->nonce->v, iph2->nonce->l); |
---|
820 | memcpy(tmp->v + iph2->nonce->l, iph2->nonce_p->v, iph2->nonce_p->l); |
---|
821 | |
---|
822 | hash = oakley_compute_hash3(iph2->ph1, iph2->msgid, tmp); |
---|
823 | vfree(tmp); |
---|
824 | |
---|
825 | if (hash == NULL) |
---|
826 | goto end; |
---|
827 | } |
---|
828 | |
---|
829 | /* create buffer for isakmp payload */ |
---|
830 | tlen = sizeof(struct isakmp) |
---|
831 | + sizeof(struct isakmp_gen) + hash->l; |
---|
832 | buf = vmalloc(tlen); |
---|
833 | if (buf == NULL) { |
---|
834 | plog(LLV_ERROR, LOCATION, NULL, |
---|
835 | "failed to get buffer to send.\n"); |
---|
836 | goto end; |
---|
837 | } |
---|
838 | |
---|
839 | /* create isakmp header */ |
---|
840 | p = set_isakmp_header2(buf, iph2, ISAKMP_NPTYPE_HASH); |
---|
841 | if (p == NULL) |
---|
842 | goto end; |
---|
843 | |
---|
844 | /* add HASH(3) payload */ |
---|
845 | p = set_isakmp_payload(p, hash, ISAKMP_NPTYPE_NONE); |
---|
846 | |
---|
847 | #ifdef HAVE_PRINT_ISAKMP_C |
---|
848 | isakmp_printpacket(buf, iph2->ph1->local, iph2->ph1->remote, 1); |
---|
849 | #endif |
---|
850 | |
---|
851 | /* encoding */ |
---|
852 | iph2->sendbuf = oakley_do_encrypt(iph2->ph1, buf, iph2->ivm->ive, iph2->ivm->iv); |
---|
853 | if (iph2->sendbuf == NULL) |
---|
854 | goto end; |
---|
855 | |
---|
856 | /* if there is commit bit, need resending */ |
---|
857 | if (ISSET(iph2->flags, ISAKMP_FLAG_C)) { |
---|
858 | /* send the packet, add to the schedule to resend */ |
---|
859 | if (isakmp_ph2send(iph2) == -1) |
---|
860 | goto end; |
---|
861 | } else { |
---|
862 | /* send the packet */ |
---|
863 | if (isakmp_send(iph2->ph1, iph2->sendbuf) < 0) |
---|
864 | goto end; |
---|
865 | } |
---|
866 | |
---|
867 | /* the sending message is added to the received-list. */ |
---|
868 | if (add_recvdpkt(iph2->ph1->remote, iph2->ph1->local, |
---|
869 | iph2->sendbuf, msg0) == -1) { |
---|
870 | plog(LLV_ERROR , LOCATION, NULL, |
---|
871 | "failed to add a response packet to the tree.\n"); |
---|
872 | goto end; |
---|
873 | } |
---|
874 | |
---|
875 | /* compute both of KEYMATs */ |
---|
876 | if (oakley_compute_keymat(iph2, INITIATOR) < 0) |
---|
877 | goto end; |
---|
878 | |
---|
879 | iph2->status = PHASE2ST_ADDSA; |
---|
880 | |
---|
881 | /* don't anything if local test mode. */ |
---|
882 | if (f_local) { |
---|
883 | error = 0; |
---|
884 | goto end; |
---|
885 | } |
---|
886 | |
---|
887 | /* if there is commit bit don't set up SA now. */ |
---|
888 | if (ISSET(iph2->flags, ISAKMP_FLAG_C)) { |
---|
889 | iph2->status = PHASE2ST_COMMIT; |
---|
890 | error = 0; |
---|
891 | goto end; |
---|
892 | } |
---|
893 | |
---|
894 | /* Do UPDATE for initiator */ |
---|
895 | plog(LLV_DEBUG, LOCATION, NULL, "call pk_sendupdate\n"); |
---|
896 | if (pk_sendupdate(iph2) < 0) { |
---|
897 | plog(LLV_ERROR, LOCATION, NULL, "pfkey update failed.\n"); |
---|
898 | goto end; |
---|
899 | } |
---|
900 | plog(LLV_DEBUG, LOCATION, NULL, "pfkey update sent.\n"); |
---|
901 | |
---|
902 | /* Do ADD for responder */ |
---|
903 | if (pk_sendadd(iph2) < 0) { |
---|
904 | plog(LLV_ERROR, LOCATION, NULL, "pfkey add failed.\n"); |
---|
905 | goto end; |
---|
906 | } |
---|
907 | plog(LLV_DEBUG, LOCATION, NULL, "pfkey add sent.\n"); |
---|
908 | |
---|
909 | error = 0; |
---|
910 | |
---|
911 | end: |
---|
912 | if (buf != NULL) |
---|
913 | vfree(buf); |
---|
914 | if (msg != NULL) |
---|
915 | vfree(msg); |
---|
916 | if (hash != NULL) |
---|
917 | vfree(hash); |
---|
918 | |
---|
919 | return error; |
---|
920 | } |
---|
921 | |
---|
922 | /* |
---|
923 | * receive from responder |
---|
924 | * HDR#*, HASH(4), notify |
---|
925 | */ |
---|
926 | int |
---|
927 | quick_i3recv(iph2, msg0) |
---|
928 | struct ph2handle *iph2; |
---|
929 | vchar_t *msg0; |
---|
930 | { |
---|
931 | vchar_t *msg = NULL; |
---|
932 | vchar_t *pbuf = NULL; /* for payload parsing */ |
---|
933 | struct isakmp_parse_t *pa; |
---|
934 | struct isakmp_pl_hash *hash = NULL; |
---|
935 | vchar_t *notify = NULL; |
---|
936 | int error = ISAKMP_INTERNAL_ERROR; |
---|
937 | |
---|
938 | /* validity check */ |
---|
939 | if (iph2->status != PHASE2ST_COMMIT) { |
---|
940 | plog(LLV_ERROR, LOCATION, NULL, |
---|
941 | "status mismatched %d.\n", iph2->status); |
---|
942 | goto end; |
---|
943 | } |
---|
944 | |
---|
945 | /* decrypt packet */ |
---|
946 | if (!ISSET(((struct isakmp *)msg0->v)->flags, ISAKMP_FLAG_E)) { |
---|
947 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
948 | "Packet wasn't encrypted.\n"); |
---|
949 | goto end; |
---|
950 | } |
---|
951 | msg = oakley_do_decrypt(iph2->ph1, msg0, iph2->ivm->iv, iph2->ivm->ive); |
---|
952 | if (msg == NULL) |
---|
953 | goto end; |
---|
954 | |
---|
955 | /* validate the type of next payload */ |
---|
956 | pbuf = isakmp_parse(msg); |
---|
957 | if (pbuf == NULL) |
---|
958 | goto end; |
---|
959 | |
---|
960 | for (pa = (struct isakmp_parse_t *)pbuf->v; |
---|
961 | pa->type != ISAKMP_NPTYPE_NONE; |
---|
962 | pa++) { |
---|
963 | |
---|
964 | switch (pa->type) { |
---|
965 | case ISAKMP_NPTYPE_HASH: |
---|
966 | hash = (struct isakmp_pl_hash *)pa->ptr; |
---|
967 | break; |
---|
968 | case ISAKMP_NPTYPE_N: |
---|
969 | if (notify != NULL) { |
---|
970 | plog(LLV_WARNING, LOCATION, NULL, |
---|
971 | "Ignoring multiples notifications\n"); |
---|
972 | break; |
---|
973 | } |
---|
974 | ph2_recv_n(iph2, pa->ptr); |
---|
975 | notify = vmalloc(pa->len); |
---|
976 | if (notify == NULL) { |
---|
977 | plog(LLV_ERROR, LOCATION, NULL, |
---|
978 | "failed to get notify buffer.\n"); |
---|
979 | goto end; |
---|
980 | } |
---|
981 | memcpy(notify->v, pa->ptr, notify->l); |
---|
982 | break; |
---|
983 | default: |
---|
984 | /* don't send information, see ident_r1recv() */ |
---|
985 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
986 | "ignore the packet, " |
---|
987 | "received unexpecting payload type %d.\n", |
---|
988 | pa->type); |
---|
989 | goto end; |
---|
990 | } |
---|
991 | } |
---|
992 | |
---|
993 | /* payload existency check */ |
---|
994 | if (hash == NULL) { |
---|
995 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
996 | "few isakmp message received.\n"); |
---|
997 | goto end; |
---|
998 | } |
---|
999 | |
---|
1000 | /* validate HASH(4) */ |
---|
1001 | { |
---|
1002 | char *r_hash; |
---|
1003 | vchar_t *my_hash = NULL; |
---|
1004 | vchar_t *tmp = NULL; |
---|
1005 | int result; |
---|
1006 | |
---|
1007 | r_hash = (char *)hash + sizeof(*hash); |
---|
1008 | |
---|
1009 | plog(LLV_DEBUG, LOCATION, NULL, "HASH(4) validate:"); |
---|
1010 | plogdump(LLV_DEBUG, r_hash, ntohs(hash->h.len) - sizeof(*hash)); |
---|
1011 | |
---|
1012 | my_hash = oakley_compute_hash1(iph2->ph1, iph2->msgid, notify); |
---|
1013 | vfree(tmp); |
---|
1014 | if (my_hash == NULL) |
---|
1015 | goto end; |
---|
1016 | |
---|
1017 | result = memcmp(my_hash->v, r_hash, my_hash->l); |
---|
1018 | vfree(my_hash); |
---|
1019 | |
---|
1020 | if (result) { |
---|
1021 | plog(LLV_DEBUG, LOCATION, iph2->ph1->remote, |
---|
1022 | "HASH(4) mismatch.\n"); |
---|
1023 | error = ISAKMP_NTYPE_INVALID_HASH_INFORMATION; |
---|
1024 | goto end; |
---|
1025 | } |
---|
1026 | } |
---|
1027 | |
---|
1028 | iph2->status = PHASE2ST_ADDSA; |
---|
1029 | iph2->flags ^= ISAKMP_FLAG_C; /* reset bit */ |
---|
1030 | |
---|
1031 | /* don't anything if local test mode. */ |
---|
1032 | if (f_local) { |
---|
1033 | error = 0; |
---|
1034 | goto end; |
---|
1035 | } |
---|
1036 | |
---|
1037 | /* Do UPDATE for initiator */ |
---|
1038 | plog(LLV_DEBUG, LOCATION, NULL, "call pk_sendupdate\n"); |
---|
1039 | if (pk_sendupdate(iph2) < 0) { |
---|
1040 | plog(LLV_ERROR, LOCATION, NULL, "pfkey update failed.\n"); |
---|
1041 | goto end; |
---|
1042 | } |
---|
1043 | plog(LLV_DEBUG, LOCATION, NULL, "pfkey update sent.\n"); |
---|
1044 | |
---|
1045 | /* Do ADD for responder */ |
---|
1046 | if (pk_sendadd(iph2) < 0) { |
---|
1047 | plog(LLV_ERROR, LOCATION, NULL, "pfkey add failed.\n"); |
---|
1048 | goto end; |
---|
1049 | } |
---|
1050 | plog(LLV_DEBUG, LOCATION, NULL, "pfkey add sent.\n"); |
---|
1051 | |
---|
1052 | error = 0; |
---|
1053 | |
---|
1054 | end: |
---|
1055 | if (msg != NULL) |
---|
1056 | vfree(msg); |
---|
1057 | if (pbuf != NULL) |
---|
1058 | vfree(pbuf); |
---|
1059 | if (notify != NULL) |
---|
1060 | vfree(notify); |
---|
1061 | |
---|
1062 | return error; |
---|
1063 | } |
---|
1064 | |
---|
1065 | /* |
---|
1066 | * receive from initiator |
---|
1067 | * HDR*, HASH(1), SA, Ni [, KE ] [, IDi2, IDr2 ] [, NAT-OAi, NAT-OAr ] |
---|
1068 | */ |
---|
1069 | int |
---|
1070 | quick_r1recv(iph2, msg0) |
---|
1071 | struct ph2handle *iph2; |
---|
1072 | vchar_t *msg0; |
---|
1073 | { |
---|
1074 | vchar_t *msg = NULL; |
---|
1075 | vchar_t *hbuf = NULL; /* for hash computing. */ |
---|
1076 | vchar_t *pbuf = NULL; /* for payload parsing */ |
---|
1077 | struct isakmp_parse_t *pa; |
---|
1078 | struct isakmp *isakmp = (struct isakmp *)msg0->v; |
---|
1079 | struct isakmp_pl_hash *hash = NULL; |
---|
1080 | char *p; |
---|
1081 | int tlen; |
---|
1082 | int f_id_order; /* for ID payload detection */ |
---|
1083 | int error = ISAKMP_INTERNAL_ERROR; |
---|
1084 | |
---|
1085 | /* validity check */ |
---|
1086 | if (iph2->status != PHASE2ST_START) { |
---|
1087 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1088 | "status mismatched %d.\n", iph2->status); |
---|
1089 | goto end; |
---|
1090 | } |
---|
1091 | |
---|
1092 | /* decrypting */ |
---|
1093 | if (!ISSET(((struct isakmp *)msg0->v)->flags, ISAKMP_FLAG_E)) { |
---|
1094 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
1095 | "Packet wasn't encrypted.\n"); |
---|
1096 | error = ISAKMP_NTYPE_PAYLOAD_MALFORMED; |
---|
1097 | goto end; |
---|
1098 | } |
---|
1099 | /* decrypt packet */ |
---|
1100 | msg = oakley_do_decrypt(iph2->ph1, msg0, iph2->ivm->iv, iph2->ivm->ive); |
---|
1101 | if (msg == NULL) { |
---|
1102 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
1103 | "Packet decryption failed.\n"); |
---|
1104 | goto end; |
---|
1105 | } |
---|
1106 | |
---|
1107 | /* create buffer for using to validate HASH(1) */ |
---|
1108 | /* |
---|
1109 | * ordering rule: |
---|
1110 | * 1. the first one must be HASH |
---|
1111 | * 2. the second one must be SA (added in isakmp-oakley-05!) |
---|
1112 | * 3. two IDs must be considered as IDci, then IDcr |
---|
1113 | */ |
---|
1114 | pbuf = isakmp_parse(msg); |
---|
1115 | if (pbuf == NULL) |
---|
1116 | goto end; |
---|
1117 | pa = (struct isakmp_parse_t *)pbuf->v; |
---|
1118 | |
---|
1119 | /* HASH payload is fixed postion */ |
---|
1120 | if (pa->type != ISAKMP_NPTYPE_HASH) { |
---|
1121 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
1122 | "received invalid next payload type %d, " |
---|
1123 | "expecting %d.\n", |
---|
1124 | pa->type, ISAKMP_NPTYPE_HASH); |
---|
1125 | error = ISAKMP_NTYPE_BAD_PROPOSAL_SYNTAX; |
---|
1126 | goto end; |
---|
1127 | } |
---|
1128 | hash = (struct isakmp_pl_hash *)pa->ptr; |
---|
1129 | pa++; |
---|
1130 | |
---|
1131 | /* |
---|
1132 | * this restriction was introduced in isakmp-oakley-05. |
---|
1133 | * we do not check this for backward compatibility. |
---|
1134 | * TODO: command line/config file option to enable/disable this code |
---|
1135 | */ |
---|
1136 | /* HASH payload is fixed postion */ |
---|
1137 | if (pa->type != ISAKMP_NPTYPE_SA) { |
---|
1138 | plog(LLV_WARNING, LOCATION, iph2->ph1->remote, |
---|
1139 | "received invalid next payload type %d, " |
---|
1140 | "expecting %d.\n", |
---|
1141 | pa->type, ISAKMP_NPTYPE_SA); |
---|
1142 | error = ISAKMP_NTYPE_BAD_PROPOSAL_SYNTAX; |
---|
1143 | } |
---|
1144 | |
---|
1145 | /* allocate buffer for computing HASH(1) */ |
---|
1146 | tlen = ntohl(isakmp->len) - sizeof(*isakmp); |
---|
1147 | hbuf = vmalloc(tlen); |
---|
1148 | if (hbuf == NULL) { |
---|
1149 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1150 | "failed to get hash buffer.\n"); |
---|
1151 | goto end; |
---|
1152 | } |
---|
1153 | p = hbuf->v; |
---|
1154 | |
---|
1155 | /* |
---|
1156 | * parse the payloads. |
---|
1157 | * copy non-HASH payloads into hbuf, so that we can validate HASH. |
---|
1158 | */ |
---|
1159 | iph2->sa = NULL; /* we don't support multi SAs. */ |
---|
1160 | iph2->nonce_p = NULL; |
---|
1161 | iph2->dhpub_p = NULL; |
---|
1162 | iph2->id_p = NULL; |
---|
1163 | iph2->id = NULL; |
---|
1164 | tlen = 0; /* count payload length except of HASH payload. */ |
---|
1165 | |
---|
1166 | /* |
---|
1167 | * IDi2 MUST be immediatelly followed by IDr2. We allowed the |
---|
1168 | * illegal case, but logged. First ID payload is to be IDi2. |
---|
1169 | * And next ID payload is to be IDr2. |
---|
1170 | */ |
---|
1171 | f_id_order = 0; |
---|
1172 | |
---|
1173 | for (; pa->type; pa++) { |
---|
1174 | |
---|
1175 | /* copy to buffer for HASH */ |
---|
1176 | /* Don't modify the payload */ |
---|
1177 | memcpy(p, pa->ptr, pa->len); |
---|
1178 | |
---|
1179 | if (pa->type != ISAKMP_NPTYPE_ID) |
---|
1180 | f_id_order = 0; |
---|
1181 | |
---|
1182 | switch (pa->type) { |
---|
1183 | case ISAKMP_NPTYPE_SA: |
---|
1184 | if (iph2->sa != NULL) { |
---|
1185 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1186 | "Multi SAs isn't supported.\n"); |
---|
1187 | goto end; |
---|
1188 | } |
---|
1189 | if (isakmp_p2ph(&iph2->sa, pa->ptr) < 0) { |
---|
1190 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
1191 | "duplicate ISAKMP_NPTYPE_SA.\n"); |
---|
1192 | goto end; |
---|
1193 | } |
---|
1194 | break; |
---|
1195 | |
---|
1196 | case ISAKMP_NPTYPE_NONCE: |
---|
1197 | if (isakmp_p2ph(&iph2->nonce_p, pa->ptr) < 0) { |
---|
1198 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
1199 | "duplicate ISAKMP_NPTYPE_NONCE.\n"); |
---|
1200 | goto end; |
---|
1201 | } |
---|
1202 | break; |
---|
1203 | |
---|
1204 | case ISAKMP_NPTYPE_KE: |
---|
1205 | if (isakmp_p2ph(&iph2->dhpub_p, pa->ptr) < 0) { |
---|
1206 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
1207 | "duplicate ISAKMP_NPTYPE_KE.\n"); |
---|
1208 | goto end; |
---|
1209 | } |
---|
1210 | break; |
---|
1211 | |
---|
1212 | case ISAKMP_NPTYPE_ID: |
---|
1213 | if (iph2->id_p == NULL) { |
---|
1214 | /* for IDci */ |
---|
1215 | f_id_order++; |
---|
1216 | |
---|
1217 | if (isakmp_p2ph(&iph2->id_p, pa->ptr) < 0) |
---|
1218 | goto end; |
---|
1219 | |
---|
1220 | } else if (iph2->id == NULL) { |
---|
1221 | /* for IDcr */ |
---|
1222 | if (f_id_order == 0) { |
---|
1223 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1224 | "IDr2 payload is not " |
---|
1225 | "immediatelly followed " |
---|
1226 | "by IDi2. We allowed.\n"); |
---|
1227 | /* XXX we allowed in this case. */ |
---|
1228 | } |
---|
1229 | |
---|
1230 | if (isakmp_p2ph(&iph2->id, pa->ptr) < 0) |
---|
1231 | goto end; |
---|
1232 | } else { |
---|
1233 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1234 | "received too many ID payloads.\n"); |
---|
1235 | plogdump(LLV_ERROR, iph2->id->v, iph2->id->l); |
---|
1236 | error = ISAKMP_NTYPE_INVALID_ID_INFORMATION; |
---|
1237 | goto end; |
---|
1238 | } |
---|
1239 | break; |
---|
1240 | |
---|
1241 | case ISAKMP_NPTYPE_N: |
---|
1242 | ph2_recv_n(iph2, pa->ptr); |
---|
1243 | break; |
---|
1244 | |
---|
1245 | #ifdef ENABLE_NATT |
---|
1246 | case ISAKMP_NPTYPE_NATOA_DRAFT: |
---|
1247 | case ISAKMP_NPTYPE_NATOA_RFC: |
---|
1248 | { |
---|
1249 | struct sockaddr_storage addr; |
---|
1250 | struct sockaddr *daddr; |
---|
1251 | u_int8_t prefix; |
---|
1252 | u_int16_t ul_proto; |
---|
1253 | vchar_t *vp = NULL; |
---|
1254 | |
---|
1255 | if (isakmp_p2ph(&vp, pa->ptr) < 0) |
---|
1256 | goto end; |
---|
1257 | |
---|
1258 | error = ipsecdoi_id2sockaddr(vp, |
---|
1259 | (struct sockaddr *) &addr, |
---|
1260 | &prefix, &ul_proto); |
---|
1261 | |
---|
1262 | vfree(vp); |
---|
1263 | |
---|
1264 | if (error) |
---|
1265 | goto end; |
---|
1266 | |
---|
1267 | daddr = dupsaddr((struct sockaddr *) &addr); |
---|
1268 | if (daddr == NULL) |
---|
1269 | goto end; |
---|
1270 | |
---|
1271 | if (iph2->natoa_dst == NULL) |
---|
1272 | iph2->natoa_dst = daddr; |
---|
1273 | else if (iph2->natoa_src == NULL) |
---|
1274 | iph2->natoa_src = daddr; |
---|
1275 | else { |
---|
1276 | racoon_free(daddr); |
---|
1277 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
1278 | "received too many NAT-OA payloads.\n"); |
---|
1279 | error = ISAKMP_NTYPE_PAYLOAD_MALFORMED; |
---|
1280 | goto end; |
---|
1281 | } |
---|
1282 | } |
---|
1283 | break; |
---|
1284 | #endif |
---|
1285 | |
---|
1286 | default: |
---|
1287 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
1288 | "ignore the packet, " |
---|
1289 | "received unexpecting payload type %d.\n", |
---|
1290 | pa->type); |
---|
1291 | error = ISAKMP_NTYPE_PAYLOAD_MALFORMED; |
---|
1292 | goto end; |
---|
1293 | } |
---|
1294 | |
---|
1295 | p += pa->len; |
---|
1296 | |
---|
1297 | /* compute true length of payload. */ |
---|
1298 | tlen += pa->len; |
---|
1299 | } |
---|
1300 | |
---|
1301 | /* payload existency check */ |
---|
1302 | if (hash == NULL || iph2->sa == NULL || iph2->nonce_p == NULL) { |
---|
1303 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
1304 | "few isakmp message received.\n"); |
---|
1305 | error = ISAKMP_NTYPE_PAYLOAD_MALFORMED; |
---|
1306 | goto end; |
---|
1307 | } |
---|
1308 | |
---|
1309 | if (iph2->id_p) { |
---|
1310 | plog(LLV_DEBUG, LOCATION, NULL, "received IDci2:"); |
---|
1311 | plogdump(LLV_DEBUG, iph2->id_p->v, iph2->id_p->l); |
---|
1312 | } |
---|
1313 | if (iph2->id) { |
---|
1314 | plog(LLV_DEBUG, LOCATION, NULL, "received IDcr2:"); |
---|
1315 | plogdump(LLV_DEBUG, iph2->id->v, iph2->id->l); |
---|
1316 | } |
---|
1317 | |
---|
1318 | /* adjust buffer length for HASH */ |
---|
1319 | hbuf->l = tlen; |
---|
1320 | |
---|
1321 | /* validate HASH(1) */ |
---|
1322 | { |
---|
1323 | char *r_hash; |
---|
1324 | vchar_t *my_hash = NULL; |
---|
1325 | int result; |
---|
1326 | |
---|
1327 | r_hash = (caddr_t)hash + sizeof(*hash); |
---|
1328 | |
---|
1329 | plog(LLV_DEBUG, LOCATION, NULL, "HASH(1) validate:"); |
---|
1330 | plogdump(LLV_DEBUG, r_hash, ntohs(hash->h.len) - sizeof(*hash)); |
---|
1331 | |
---|
1332 | my_hash = oakley_compute_hash1(iph2->ph1, iph2->msgid, hbuf); |
---|
1333 | if (my_hash == NULL) |
---|
1334 | goto end; |
---|
1335 | |
---|
1336 | result = memcmp(my_hash->v, r_hash, my_hash->l); |
---|
1337 | vfree(my_hash); |
---|
1338 | |
---|
1339 | if (result) { |
---|
1340 | plog(LLV_DEBUG, LOCATION, iph2->ph1->remote, |
---|
1341 | "HASH(1) mismatch.\n"); |
---|
1342 | error = ISAKMP_NTYPE_INVALID_HASH_INFORMATION; |
---|
1343 | goto end; |
---|
1344 | } |
---|
1345 | } |
---|
1346 | |
---|
1347 | /* get sainfo */ |
---|
1348 | error = get_sainfo_r(iph2); |
---|
1349 | if (error) { |
---|
1350 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1351 | "failed to get sainfo.\n"); |
---|
1352 | goto end; |
---|
1353 | } |
---|
1354 | |
---|
1355 | |
---|
1356 | /* check the existence of ID payload and create responder's proposal */ |
---|
1357 | error = get_proposal_r(iph2); |
---|
1358 | switch (error) { |
---|
1359 | case -2: |
---|
1360 | /* generate a policy template from peer's proposal */ |
---|
1361 | if (set_proposal_from_proposal(iph2)) { |
---|
1362 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1363 | "failed to generate a proposal template " |
---|
1364 | "from client's proposal.\n"); |
---|
1365 | error = ISAKMP_INTERNAL_ERROR; |
---|
1366 | goto end; |
---|
1367 | } |
---|
1368 | /*FALLTHROUGH*/ |
---|
1369 | case 0: |
---|
1370 | /* select single proposal or reject it. */ |
---|
1371 | if (ipsecdoi_selectph2proposal(iph2) < 0) { |
---|
1372 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
1373 | "no proposal chosen.\n"); |
---|
1374 | error = ISAKMP_NTYPE_NO_PROPOSAL_CHOSEN; |
---|
1375 | goto end; |
---|
1376 | } |
---|
1377 | break; |
---|
1378 | default: |
---|
1379 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1380 | "failed to get proposal for responder.\n"); |
---|
1381 | goto end; |
---|
1382 | } |
---|
1383 | |
---|
1384 | /* check KE and attribute of PFS */ |
---|
1385 | if (iph2->dhpub_p != NULL && iph2->approval->pfs_group == 0) { |
---|
1386 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1387 | "no PFS is specified, but peer sends KE.\n"); |
---|
1388 | error = ISAKMP_NTYPE_NO_PROPOSAL_CHOSEN; |
---|
1389 | goto end; |
---|
1390 | } |
---|
1391 | if (iph2->dhpub_p == NULL && iph2->approval->pfs_group != 0) { |
---|
1392 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1393 | "PFS is specified, but peer doesn't sends KE.\n"); |
---|
1394 | error = ISAKMP_NTYPE_NO_PROPOSAL_CHOSEN; |
---|
1395 | goto end; |
---|
1396 | } |
---|
1397 | |
---|
1398 | /* |
---|
1399 | * save the packet from the initiator in order to resend the |
---|
1400 | * responder's first packet against this packet. |
---|
1401 | */ |
---|
1402 | iph2->msg1 = vdup(msg0); |
---|
1403 | |
---|
1404 | /* change status of isakmp status entry */ |
---|
1405 | iph2->status = PHASE2ST_STATUS2; |
---|
1406 | |
---|
1407 | error = 0; |
---|
1408 | |
---|
1409 | end: |
---|
1410 | if (hbuf) |
---|
1411 | vfree(hbuf); |
---|
1412 | if (msg) |
---|
1413 | vfree(msg); |
---|
1414 | if (pbuf) |
---|
1415 | vfree(pbuf); |
---|
1416 | |
---|
1417 | if (error) { |
---|
1418 | VPTRINIT(iph2->sa); |
---|
1419 | VPTRINIT(iph2->nonce_p); |
---|
1420 | VPTRINIT(iph2->dhpub_p); |
---|
1421 | VPTRINIT(iph2->id); |
---|
1422 | VPTRINIT(iph2->id_p); |
---|
1423 | #ifdef ENABLE_NATT |
---|
1424 | if (iph2->natoa_src) { |
---|
1425 | racoon_free(iph2->natoa_src); |
---|
1426 | iph2->natoa_src = NULL; |
---|
1427 | } |
---|
1428 | if (iph2->natoa_dst) { |
---|
1429 | racoon_free(iph2->natoa_dst); |
---|
1430 | iph2->natoa_dst = NULL; |
---|
1431 | } |
---|
1432 | #endif |
---|
1433 | } |
---|
1434 | |
---|
1435 | return error; |
---|
1436 | } |
---|
1437 | |
---|
1438 | /* |
---|
1439 | * call pfkey_getspi. |
---|
1440 | */ |
---|
1441 | int |
---|
1442 | quick_r1prep(iph2, msg) |
---|
1443 | struct ph2handle *iph2; |
---|
1444 | vchar_t *msg; |
---|
1445 | { |
---|
1446 | int error = ISAKMP_INTERNAL_ERROR; |
---|
1447 | |
---|
1448 | /* validity check */ |
---|
1449 | if (iph2->status != PHASE2ST_STATUS2) { |
---|
1450 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1451 | "status mismatched %d.\n", iph2->status); |
---|
1452 | goto end; |
---|
1453 | } |
---|
1454 | |
---|
1455 | iph2->status = PHASE2ST_GETSPISENT; |
---|
1456 | |
---|
1457 | /* send getspi message */ |
---|
1458 | if (pk_sendgetspi(iph2) < 0) |
---|
1459 | goto end; |
---|
1460 | |
---|
1461 | plog(LLV_DEBUG, LOCATION, NULL, "pfkey getspi sent.\n"); |
---|
1462 | |
---|
1463 | sched_schedule(&iph2->sce, lcconf->wait_ph2complete, |
---|
1464 | quick_timeover_stub); |
---|
1465 | |
---|
1466 | error = 0; |
---|
1467 | |
---|
1468 | end: |
---|
1469 | return error; |
---|
1470 | } |
---|
1471 | |
---|
1472 | /* |
---|
1473 | * send to initiator |
---|
1474 | * HDR*, HASH(2), SA, Nr [, KE ] [, IDi2, IDr2 ] [, NAT-OAi, NAT-OAr ] |
---|
1475 | */ |
---|
1476 | int |
---|
1477 | quick_r2send(iph2, msg) |
---|
1478 | struct ph2handle *iph2; |
---|
1479 | vchar_t *msg; |
---|
1480 | { |
---|
1481 | vchar_t *body = NULL; |
---|
1482 | vchar_t *hash = NULL; |
---|
1483 | struct isakmp_gen *gen; |
---|
1484 | char *p; |
---|
1485 | int tlen; |
---|
1486 | int error = ISAKMP_INTERNAL_ERROR; |
---|
1487 | int natoa = ISAKMP_NPTYPE_NONE; |
---|
1488 | int pfsgroup; |
---|
1489 | u_int8_t *np_p = NULL; |
---|
1490 | #ifdef ENABLE_NATT |
---|
1491 | vchar_t *nat_oai = NULL; |
---|
1492 | vchar_t *nat_oar = NULL; |
---|
1493 | #endif |
---|
1494 | |
---|
1495 | /* validity check */ |
---|
1496 | if (msg != NULL) { |
---|
1497 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1498 | "msg has to be NULL in this function.\n"); |
---|
1499 | goto end; |
---|
1500 | } |
---|
1501 | if (iph2->status != PHASE2ST_GETSPIDONE) { |
---|
1502 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1503 | "status mismatched %d.\n", iph2->status); |
---|
1504 | goto end; |
---|
1505 | } |
---|
1506 | |
---|
1507 | /* update responders SPI */ |
---|
1508 | if (ipsecdoi_updatespi(iph2) < 0) { |
---|
1509 | plog(LLV_ERROR, LOCATION, NULL, "failed to update spi.\n"); |
---|
1510 | goto end; |
---|
1511 | } |
---|
1512 | |
---|
1513 | /* generate NONCE value */ |
---|
1514 | iph2->nonce = eay_set_random(iph2->ph1->rmconf->nonce_size); |
---|
1515 | if (iph2->nonce == NULL) |
---|
1516 | goto end; |
---|
1517 | |
---|
1518 | /* generate KE value if need */ |
---|
1519 | pfsgroup = iph2->approval->pfs_group; |
---|
1520 | if (iph2->dhpub_p != NULL && pfsgroup != 0) { |
---|
1521 | /* DH group settting if PFS is required. */ |
---|
1522 | if (oakley_setdhgroup(pfsgroup, &iph2->pfsgrp) < 0) { |
---|
1523 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1524 | "failed to set DH value.\n"); |
---|
1525 | goto end; |
---|
1526 | } |
---|
1527 | /* generate DH public value */ |
---|
1528 | if (oakley_dh_generate(iph2->pfsgrp, |
---|
1529 | &iph2->dhpub, &iph2->dhpriv) < 0) { |
---|
1530 | goto end; |
---|
1531 | } |
---|
1532 | } |
---|
1533 | |
---|
1534 | #ifdef ENABLE_NATT |
---|
1535 | /* |
---|
1536 | * RFC3947 5.2. if we chose UDP-Encapsulated-Transport |
---|
1537 | * we should send NAT-OA |
---|
1538 | */ |
---|
1539 | if (ipsecdoi_transportmode(iph2->proposal) |
---|
1540 | && (iph2->ph1->natt_flags & NAT_DETECTED)) { |
---|
1541 | natoa = iph2->ph1->natt_options->payload_nat_oa; |
---|
1542 | |
---|
1543 | nat_oai = ipsecdoi_sockaddr2id(iph2->dst, |
---|
1544 | IPSECDOI_PREFIX_HOST, IPSEC_ULPROTO_ANY); |
---|
1545 | nat_oar = ipsecdoi_sockaddr2id(iph2->src, |
---|
1546 | IPSECDOI_PREFIX_HOST, IPSEC_ULPROTO_ANY); |
---|
1547 | |
---|
1548 | if (nat_oai == NULL || nat_oar == NULL) { |
---|
1549 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1550 | "failed to generate NAT-OA payload.\n"); |
---|
1551 | goto end; |
---|
1552 | } |
---|
1553 | |
---|
1554 | plog(LLV_DEBUG, LOCATION, NULL, "NAT-OAi:\n"); |
---|
1555 | plogdump(LLV_DEBUG, nat_oai->v, nat_oai->l); |
---|
1556 | plog(LLV_DEBUG, LOCATION, NULL, "NAT-OAr:\n"); |
---|
1557 | plogdump(LLV_DEBUG, nat_oar->v, nat_oar->l); |
---|
1558 | } |
---|
1559 | #endif |
---|
1560 | |
---|
1561 | /* create SA;NONCE payload, and KE and ID if need */ |
---|
1562 | tlen = sizeof(*gen) + iph2->sa_ret->l |
---|
1563 | + sizeof(*gen) + iph2->nonce->l; |
---|
1564 | if (iph2->dhpub_p != NULL && pfsgroup != 0) |
---|
1565 | tlen += (sizeof(*gen) + iph2->dhpub->l); |
---|
1566 | if (iph2->id_p != NULL) |
---|
1567 | tlen += (sizeof(*gen) + iph2->id_p->l |
---|
1568 | + sizeof(*gen) + iph2->id->l); |
---|
1569 | #ifdef ENABLE_NATT |
---|
1570 | if (natoa != ISAKMP_NPTYPE_NONE) |
---|
1571 | tlen += 2 * sizeof(*gen) + nat_oai->l + nat_oar->l; |
---|
1572 | #endif |
---|
1573 | |
---|
1574 | body = vmalloc(tlen); |
---|
1575 | if (body == NULL) { |
---|
1576 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1577 | "failed to get buffer to send.\n"); |
---|
1578 | goto end; |
---|
1579 | } |
---|
1580 | p = body->v; |
---|
1581 | |
---|
1582 | /* make SA payload */ |
---|
1583 | p = set_isakmp_payload(body->v, iph2->sa_ret, ISAKMP_NPTYPE_NONCE); |
---|
1584 | |
---|
1585 | /* add NONCE payload */ |
---|
1586 | np_p = &((struct isakmp_gen *)p)->np; /* XXX */ |
---|
1587 | p = set_isakmp_payload(p, iph2->nonce, |
---|
1588 | (iph2->dhpub_p != NULL && pfsgroup != 0) |
---|
1589 | ? ISAKMP_NPTYPE_KE |
---|
1590 | : (iph2->id_p != NULL |
---|
1591 | ? ISAKMP_NPTYPE_ID |
---|
1592 | : natoa)); |
---|
1593 | |
---|
1594 | /* add KE payload if need. */ |
---|
1595 | if (iph2->dhpub_p != NULL && pfsgroup != 0) { |
---|
1596 | np_p = &((struct isakmp_gen *)p)->np; /* XXX */ |
---|
1597 | p = set_isakmp_payload(p, iph2->dhpub, |
---|
1598 | (iph2->id_p == NULL) |
---|
1599 | ? natoa |
---|
1600 | : ISAKMP_NPTYPE_ID); |
---|
1601 | } |
---|
1602 | |
---|
1603 | /* add ID payloads received. */ |
---|
1604 | if (iph2->id_p != NULL) { |
---|
1605 | /* IDci */ |
---|
1606 | p = set_isakmp_payload(p, iph2->id_p, ISAKMP_NPTYPE_ID); |
---|
1607 | /* IDcr */ |
---|
1608 | np_p = &((struct isakmp_gen *)p)->np; /* XXX */ |
---|
1609 | p = set_isakmp_payload(p, iph2->id, natoa); |
---|
1610 | } |
---|
1611 | |
---|
1612 | #ifdef ENABLE_NATT |
---|
1613 | /* NAT-OA */ |
---|
1614 | if (natoa != ISAKMP_NPTYPE_NONE) { |
---|
1615 | p = set_isakmp_payload(p, nat_oai, natoa); |
---|
1616 | p = set_isakmp_payload(p, nat_oar, ISAKMP_NPTYPE_NONE); |
---|
1617 | } |
---|
1618 | #endif |
---|
1619 | |
---|
1620 | /* add a RESPONDER-LIFETIME notify payload if needed */ |
---|
1621 | { |
---|
1622 | vchar_t *data = NULL; |
---|
1623 | struct saprop *pp = iph2->approval; |
---|
1624 | struct saproto *pr; |
---|
1625 | |
---|
1626 | if (pp->claim & IPSECDOI_ATTR_SA_LD_TYPE_SEC) { |
---|
1627 | u_int32_t v = htonl((u_int32_t)pp->lifetime); |
---|
1628 | data = isakmp_add_attr_l(data, IPSECDOI_ATTR_SA_LD_TYPE, |
---|
1629 | IPSECDOI_ATTR_SA_LD_TYPE_SEC); |
---|
1630 | if (!data) |
---|
1631 | goto end; |
---|
1632 | data = isakmp_add_attr_v(data, IPSECDOI_ATTR_SA_LD, |
---|
1633 | (caddr_t)&v, sizeof(v)); |
---|
1634 | if (!data) |
---|
1635 | goto end; |
---|
1636 | } |
---|
1637 | if (pp->claim & IPSECDOI_ATTR_SA_LD_TYPE_KB) { |
---|
1638 | u_int32_t v = htonl((u_int32_t)pp->lifebyte); |
---|
1639 | data = isakmp_add_attr_l(data, IPSECDOI_ATTR_SA_LD_TYPE, |
---|
1640 | IPSECDOI_ATTR_SA_LD_TYPE_KB); |
---|
1641 | if (!data) |
---|
1642 | goto end; |
---|
1643 | data = isakmp_add_attr_v(data, IPSECDOI_ATTR_SA_LD, |
---|
1644 | (caddr_t)&v, sizeof(v)); |
---|
1645 | if (!data) |
---|
1646 | goto end; |
---|
1647 | } |
---|
1648 | |
---|
1649 | /* |
---|
1650 | * XXX Is there only single RESPONDER-LIFETIME payload in a IKE message |
---|
1651 | * in the case of SA bundle ? |
---|
1652 | */ |
---|
1653 | if (data) { |
---|
1654 | for (pr = pp->head; pr; pr = pr->next) { |
---|
1655 | body = isakmp_add_pl_n(body, &np_p, |
---|
1656 | ISAKMP_NTYPE_RESPONDER_LIFETIME, pr, data); |
---|
1657 | if (!body) { |
---|
1658 | vfree(data); |
---|
1659 | return error; /* XXX */ |
---|
1660 | } |
---|
1661 | } |
---|
1662 | vfree(data); |
---|
1663 | } |
---|
1664 | } |
---|
1665 | |
---|
1666 | /* generate HASH(2) */ |
---|
1667 | { |
---|
1668 | vchar_t *tmp; |
---|
1669 | |
---|
1670 | tmp = vmalloc(iph2->nonce_p->l + body->l); |
---|
1671 | if (tmp == NULL) { |
---|
1672 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1673 | "failed to get hash buffer.\n"); |
---|
1674 | goto end; |
---|
1675 | } |
---|
1676 | memcpy(tmp->v, iph2->nonce_p->v, iph2->nonce_p->l); |
---|
1677 | memcpy(tmp->v + iph2->nonce_p->l, body->v, body->l); |
---|
1678 | |
---|
1679 | hash = oakley_compute_hash1(iph2->ph1, iph2->msgid, tmp); |
---|
1680 | vfree(tmp); |
---|
1681 | |
---|
1682 | if (hash == NULL) |
---|
1683 | goto end; |
---|
1684 | } |
---|
1685 | |
---|
1686 | /* send isakmp payload */ |
---|
1687 | iph2->sendbuf = quick_ir1mx(iph2, body, hash); |
---|
1688 | if (iph2->sendbuf == NULL) |
---|
1689 | goto end; |
---|
1690 | |
---|
1691 | /* send the packet, add to the schedule to resend */ |
---|
1692 | if (isakmp_ph2send(iph2) == -1) |
---|
1693 | goto end; |
---|
1694 | |
---|
1695 | /* the sending message is added to the received-list. */ |
---|
1696 | if (add_recvdpkt(iph2->ph1->remote, iph2->ph1->local, iph2->sendbuf, iph2->msg1) == -1) { |
---|
1697 | plog(LLV_ERROR , LOCATION, NULL, |
---|
1698 | "failed to add a response packet to the tree.\n"); |
---|
1699 | goto end; |
---|
1700 | } |
---|
1701 | |
---|
1702 | /* change status of isakmp status entry */ |
---|
1703 | iph2->status = PHASE2ST_MSG1SENT; |
---|
1704 | |
---|
1705 | error = 0; |
---|
1706 | |
---|
1707 | end: |
---|
1708 | if (body != NULL) |
---|
1709 | vfree(body); |
---|
1710 | if (hash != NULL) |
---|
1711 | vfree(hash); |
---|
1712 | #ifdef ENABLE_NATT |
---|
1713 | if (nat_oai != NULL) |
---|
1714 | vfree(nat_oai); |
---|
1715 | if (nat_oar != NULL) |
---|
1716 | vfree(nat_oar); |
---|
1717 | #endif |
---|
1718 | |
---|
1719 | return error; |
---|
1720 | } |
---|
1721 | |
---|
1722 | /* |
---|
1723 | * receive from initiator |
---|
1724 | * HDR*, HASH(3) |
---|
1725 | |
---|
1726 | */ |
---|
1727 | int |
---|
1728 | quick_r3recv(iph2, msg0) |
---|
1729 | struct ph2handle *iph2; |
---|
1730 | vchar_t *msg0; |
---|
1731 | { |
---|
1732 | vchar_t *msg = NULL; |
---|
1733 | vchar_t *pbuf = NULL; /* for payload parsing */ |
---|
1734 | struct isakmp_parse_t *pa; |
---|
1735 | struct isakmp_pl_hash *hash = NULL; |
---|
1736 | int error = ISAKMP_INTERNAL_ERROR; |
---|
1737 | |
---|
1738 | /* validity check */ |
---|
1739 | if (iph2->status != PHASE2ST_MSG1SENT) { |
---|
1740 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1741 | "status mismatched %d.\n", iph2->status); |
---|
1742 | goto end; |
---|
1743 | } |
---|
1744 | |
---|
1745 | /* decrypt packet */ |
---|
1746 | if (!ISSET(((struct isakmp *)msg0->v)->flags, ISAKMP_FLAG_E)) { |
---|
1747 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
1748 | "Packet wasn't encrypted.\n"); |
---|
1749 | goto end; |
---|
1750 | } |
---|
1751 | msg = oakley_do_decrypt(iph2->ph1, msg0, iph2->ivm->iv, iph2->ivm->ive); |
---|
1752 | if (msg == NULL) |
---|
1753 | goto end; |
---|
1754 | |
---|
1755 | /* validate the type of next payload */ |
---|
1756 | pbuf = isakmp_parse(msg); |
---|
1757 | if (pbuf == NULL) |
---|
1758 | goto end; |
---|
1759 | |
---|
1760 | for (pa = (struct isakmp_parse_t *)pbuf->v; |
---|
1761 | pa->type != ISAKMP_NPTYPE_NONE; |
---|
1762 | pa++) { |
---|
1763 | |
---|
1764 | switch (pa->type) { |
---|
1765 | case ISAKMP_NPTYPE_HASH: |
---|
1766 | hash = (struct isakmp_pl_hash *)pa->ptr; |
---|
1767 | break; |
---|
1768 | case ISAKMP_NPTYPE_N: |
---|
1769 | ph2_recv_n(iph2, pa->ptr); |
---|
1770 | break; |
---|
1771 | default: |
---|
1772 | /* don't send information, see ident_r1recv() */ |
---|
1773 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
1774 | "ignore the packet, " |
---|
1775 | "received unexpecting payload type %d.\n", |
---|
1776 | pa->type); |
---|
1777 | goto end; |
---|
1778 | } |
---|
1779 | } |
---|
1780 | |
---|
1781 | /* payload existency check */ |
---|
1782 | if (hash == NULL) { |
---|
1783 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
1784 | "few isakmp message received.\n"); |
---|
1785 | goto end; |
---|
1786 | } |
---|
1787 | |
---|
1788 | /* validate HASH(3) */ |
---|
1789 | /* HASH(3) = prf(SKEYID_a, 0 | M-ID | Ni_b | Nr_b) */ |
---|
1790 | { |
---|
1791 | char *r_hash; |
---|
1792 | vchar_t *my_hash = NULL; |
---|
1793 | vchar_t *tmp = NULL; |
---|
1794 | int result; |
---|
1795 | |
---|
1796 | r_hash = (char *)hash + sizeof(*hash); |
---|
1797 | |
---|
1798 | plog(LLV_DEBUG, LOCATION, NULL, "HASH(3) validate:"); |
---|
1799 | plogdump(LLV_DEBUG, r_hash, ntohs(hash->h.len) - sizeof(*hash)); |
---|
1800 | |
---|
1801 | tmp = vmalloc(iph2->nonce_p->l + iph2->nonce->l); |
---|
1802 | if (tmp == NULL) { |
---|
1803 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1804 | "failed to get hash buffer.\n"); |
---|
1805 | goto end; |
---|
1806 | } |
---|
1807 | memcpy(tmp->v, iph2->nonce_p->v, iph2->nonce_p->l); |
---|
1808 | memcpy(tmp->v + iph2->nonce_p->l, iph2->nonce->v, iph2->nonce->l); |
---|
1809 | |
---|
1810 | my_hash = oakley_compute_hash3(iph2->ph1, iph2->msgid, tmp); |
---|
1811 | vfree(tmp); |
---|
1812 | if (my_hash == NULL) |
---|
1813 | goto end; |
---|
1814 | |
---|
1815 | result = memcmp(my_hash->v, r_hash, my_hash->l); |
---|
1816 | vfree(my_hash); |
---|
1817 | |
---|
1818 | if (result) { |
---|
1819 | plog(LLV_ERROR, LOCATION, iph2->ph1->remote, |
---|
1820 | "HASH(3) mismatch.\n"); |
---|
1821 | error = ISAKMP_NTYPE_INVALID_HASH_INFORMATION; |
---|
1822 | goto end; |
---|
1823 | } |
---|
1824 | } |
---|
1825 | |
---|
1826 | /* if there is commit bit, don't set up SA now. */ |
---|
1827 | if (ISSET(iph2->flags, ISAKMP_FLAG_C)) { |
---|
1828 | iph2->status = PHASE2ST_COMMIT; |
---|
1829 | } else |
---|
1830 | iph2->status = PHASE2ST_STATUS6; |
---|
1831 | |
---|
1832 | error = 0; |
---|
1833 | |
---|
1834 | end: |
---|
1835 | if (pbuf != NULL) |
---|
1836 | vfree(pbuf); |
---|
1837 | if (msg != NULL) |
---|
1838 | vfree(msg); |
---|
1839 | |
---|
1840 | return error; |
---|
1841 | } |
---|
1842 | |
---|
1843 | /* |
---|
1844 | * send to initiator |
---|
1845 | * HDR#*, HASH(4), notify |
---|
1846 | */ |
---|
1847 | int |
---|
1848 | quick_r3send(iph2, msg0) |
---|
1849 | struct ph2handle *iph2; |
---|
1850 | vchar_t *msg0; |
---|
1851 | { |
---|
1852 | vchar_t *buf = NULL; |
---|
1853 | vchar_t *myhash = NULL; |
---|
1854 | struct isakmp_pl_n *n; |
---|
1855 | vchar_t *notify = NULL; |
---|
1856 | char *p; |
---|
1857 | int tlen; |
---|
1858 | int error = ISAKMP_INTERNAL_ERROR; |
---|
1859 | |
---|
1860 | /* validity check */ |
---|
1861 | if (iph2->status != PHASE2ST_COMMIT) { |
---|
1862 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1863 | "status mismatched %d.\n", iph2->status); |
---|
1864 | goto end; |
---|
1865 | } |
---|
1866 | |
---|
1867 | /* generate HASH(4) */ |
---|
1868 | /* XXX What can I do in the case of multiple different SA */ |
---|
1869 | plog(LLV_DEBUG, LOCATION, NULL, "HASH(4) generate\n"); |
---|
1870 | |
---|
1871 | /* XXX What should I do if there are multiple SAs ? */ |
---|
1872 | tlen = sizeof(struct isakmp_pl_n) + iph2->approval->head->spisize; |
---|
1873 | notify = vmalloc(tlen); |
---|
1874 | if (notify == NULL) { |
---|
1875 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1876 | "failed to get notify buffer.\n"); |
---|
1877 | goto end; |
---|
1878 | } |
---|
1879 | n = (struct isakmp_pl_n *)notify->v; |
---|
1880 | n->h.np = ISAKMP_NPTYPE_NONE; |
---|
1881 | n->h.len = htons(tlen); |
---|
1882 | n->doi = htonl(IPSEC_DOI); |
---|
1883 | n->proto_id = iph2->approval->head->proto_id; |
---|
1884 | n->spi_size = sizeof(iph2->approval->head->spisize); |
---|
1885 | n->type = htons(ISAKMP_NTYPE_CONNECTED); |
---|
1886 | memcpy(n + 1, &iph2->approval->head->spi, iph2->approval->head->spisize); |
---|
1887 | |
---|
1888 | myhash = oakley_compute_hash1(iph2->ph1, iph2->msgid, notify); |
---|
1889 | if (myhash == NULL) |
---|
1890 | goto end; |
---|
1891 | |
---|
1892 | /* create buffer for isakmp payload */ |
---|
1893 | tlen = sizeof(struct isakmp) |
---|
1894 | + sizeof(struct isakmp_gen) + myhash->l |
---|
1895 | + notify->l; |
---|
1896 | buf = vmalloc(tlen); |
---|
1897 | if (buf == NULL) { |
---|
1898 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1899 | "failed to get buffer to send.\n"); |
---|
1900 | goto end; |
---|
1901 | } |
---|
1902 | |
---|
1903 | /* create isakmp header */ |
---|
1904 | p = set_isakmp_header2(buf, iph2, ISAKMP_NPTYPE_HASH); |
---|
1905 | if (p == NULL) |
---|
1906 | goto end; |
---|
1907 | |
---|
1908 | /* add HASH(4) payload */ |
---|
1909 | p = set_isakmp_payload(p, myhash, ISAKMP_NPTYPE_N); |
---|
1910 | |
---|
1911 | /* add notify payload */ |
---|
1912 | memcpy(p, notify->v, notify->l); |
---|
1913 | |
---|
1914 | #ifdef HAVE_PRINT_ISAKMP_C |
---|
1915 | isakmp_printpacket(buf, iph2->ph1->local, iph2->ph1->remote, 1); |
---|
1916 | #endif |
---|
1917 | |
---|
1918 | /* encoding */ |
---|
1919 | iph2->sendbuf = oakley_do_encrypt(iph2->ph1, buf, iph2->ivm->ive, iph2->ivm->iv); |
---|
1920 | if (iph2->sendbuf == NULL) |
---|
1921 | goto end; |
---|
1922 | |
---|
1923 | /* send the packet */ |
---|
1924 | if (isakmp_send(iph2->ph1, iph2->sendbuf) < 0) |
---|
1925 | goto end; |
---|
1926 | |
---|
1927 | /* the sending message is added to the received-list. */ |
---|
1928 | if (add_recvdpkt(iph2->ph1->remote, iph2->ph1->local, iph2->sendbuf, msg0) == -1) { |
---|
1929 | plog(LLV_ERROR , LOCATION, NULL, |
---|
1930 | "failed to add a response packet to the tree.\n"); |
---|
1931 | goto end; |
---|
1932 | } |
---|
1933 | |
---|
1934 | iph2->status = PHASE2ST_COMMIT; |
---|
1935 | |
---|
1936 | error = 0; |
---|
1937 | |
---|
1938 | end: |
---|
1939 | if (buf != NULL) |
---|
1940 | vfree(buf); |
---|
1941 | if (myhash != NULL) |
---|
1942 | vfree(myhash); |
---|
1943 | if (notify != NULL) |
---|
1944 | vfree(notify); |
---|
1945 | |
---|
1946 | return error; |
---|
1947 | } |
---|
1948 | |
---|
1949 | int |
---|
1950 | tunnel_mode_prop(p) |
---|
1951 | struct saprop *p; |
---|
1952 | { |
---|
1953 | struct saproto *pr; |
---|
1954 | |
---|
1955 | for (pr = p->head; pr; pr = pr->next) |
---|
1956 | if (pr->encmode == IPSECDOI_ATTR_ENC_MODE_TUNNEL) |
---|
1957 | return 1; |
---|
1958 | return 0; |
---|
1959 | } |
---|
1960 | |
---|
1961 | /* |
---|
1962 | * set SA to kernel. |
---|
1963 | */ |
---|
1964 | int |
---|
1965 | quick_r3prep(iph2, msg0) |
---|
1966 | struct ph2handle *iph2; |
---|
1967 | vchar_t *msg0; |
---|
1968 | { |
---|
1969 | int error = ISAKMP_INTERNAL_ERROR; |
---|
1970 | |
---|
1971 | /* validity check */ |
---|
1972 | if (iph2->status != PHASE2ST_STATUS6) { |
---|
1973 | plog(LLV_ERROR, LOCATION, NULL, |
---|
1974 | "status mismatched %d.\n", iph2->status); |
---|
1975 | goto end; |
---|
1976 | } |
---|
1977 | |
---|
1978 | /* compute both of KEYMATs */ |
---|
1979 | if (oakley_compute_keymat(iph2, RESPONDER) < 0) |
---|
1980 | goto end; |
---|
1981 | |
---|
1982 | iph2->status = PHASE2ST_ADDSA; |
---|
1983 | iph2->flags ^= ISAKMP_FLAG_C; /* reset bit */ |
---|
1984 | |
---|
1985 | /* don't anything if local test mode. */ |
---|
1986 | if (f_local) { |
---|
1987 | error = 0; |
---|
1988 | goto end; |
---|
1989 | } |
---|
1990 | |
---|
1991 | /* Do UPDATE as responder */ |
---|
1992 | plog(LLV_DEBUG, LOCATION, NULL, "call pk_sendupdate\n"); |
---|
1993 | if (pk_sendupdate(iph2) < 0) { |
---|
1994 | plog(LLV_ERROR, LOCATION, NULL, "pfkey update failed.\n"); |
---|
1995 | goto end; |
---|
1996 | } |
---|
1997 | plog(LLV_DEBUG, LOCATION, NULL, "pfkey update sent.\n"); |
---|
1998 | |
---|
1999 | /* Do ADD for responder */ |
---|
2000 | if (pk_sendadd(iph2) < 0) { |
---|
2001 | plog(LLV_ERROR, LOCATION, NULL, "pfkey add failed.\n"); |
---|
2002 | goto end; |
---|
2003 | } |
---|
2004 | plog(LLV_DEBUG, LOCATION, NULL, "pfkey add sent.\n"); |
---|
2005 | |
---|
2006 | /* |
---|
2007 | * set policies into SPD if the policy is generated |
---|
2008 | * from peer's policy. |
---|
2009 | */ |
---|
2010 | if (iph2->spidx_gen) { |
---|
2011 | |
---|
2012 | struct policyindex *spidx; |
---|
2013 | struct sockaddr_storage addr; |
---|
2014 | u_int8_t pref; |
---|
2015 | struct sockaddr *src = iph2->src; |
---|
2016 | struct sockaddr *dst = iph2->dst; |
---|
2017 | |
---|
2018 | /* make inbound policy */ |
---|
2019 | iph2->src = dst; |
---|
2020 | iph2->dst = src; |
---|
2021 | if (pk_sendspdupdate2(iph2) < 0) { |
---|
2022 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2023 | "pfkey spdupdate2(inbound) failed.\n"); |
---|
2024 | goto end; |
---|
2025 | } |
---|
2026 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2027 | "pfkey spdupdate2(inbound) sent.\n"); |
---|
2028 | |
---|
2029 | spidx = (struct policyindex *)iph2->spidx_gen; |
---|
2030 | #ifdef HAVE_POLICY_FWD |
---|
2031 | /* make forward policy if required */ |
---|
2032 | if (tunnel_mode_prop(iph2->approval)) { |
---|
2033 | spidx->dir = IPSEC_DIR_FWD; |
---|
2034 | if (pk_sendspdupdate2(iph2) < 0) { |
---|
2035 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2036 | "pfkey spdupdate2(forward) failed.\n"); |
---|
2037 | goto end; |
---|
2038 | } |
---|
2039 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2040 | "pfkey spdupdate2(forward) sent.\n"); |
---|
2041 | } |
---|
2042 | #endif |
---|
2043 | |
---|
2044 | /* make outbound policy */ |
---|
2045 | iph2->src = src; |
---|
2046 | iph2->dst = dst; |
---|
2047 | spidx->dir = IPSEC_DIR_OUTBOUND; |
---|
2048 | addr = spidx->src; |
---|
2049 | spidx->src = spidx->dst; |
---|
2050 | spidx->dst = addr; |
---|
2051 | pref = spidx->prefs; |
---|
2052 | spidx->prefs = spidx->prefd; |
---|
2053 | spidx->prefd = pref; |
---|
2054 | |
---|
2055 | if (pk_sendspdupdate2(iph2) < 0) { |
---|
2056 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2057 | "pfkey spdupdate2(outbound) failed.\n"); |
---|
2058 | goto end; |
---|
2059 | } |
---|
2060 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2061 | "pfkey spdupdate2(outbound) sent.\n"); |
---|
2062 | |
---|
2063 | /* spidx_gen is unnecessary any more */ |
---|
2064 | delsp_bothdir((struct policyindex *)iph2->spidx_gen); |
---|
2065 | racoon_free(iph2->spidx_gen); |
---|
2066 | iph2->spidx_gen = NULL; |
---|
2067 | iph2->generated_spidx=1; |
---|
2068 | } |
---|
2069 | |
---|
2070 | error = 0; |
---|
2071 | |
---|
2072 | end: |
---|
2073 | return error; |
---|
2074 | } |
---|
2075 | |
---|
2076 | /* |
---|
2077 | * create HASH, body (SA, NONCE) payload with isakmp header. |
---|
2078 | */ |
---|
2079 | static vchar_t * |
---|
2080 | quick_ir1mx(iph2, body, hash) |
---|
2081 | struct ph2handle *iph2; |
---|
2082 | vchar_t *body, *hash; |
---|
2083 | { |
---|
2084 | struct isakmp *isakmp; |
---|
2085 | vchar_t *buf = NULL, *new = NULL; |
---|
2086 | char *p; |
---|
2087 | int tlen; |
---|
2088 | struct isakmp_gen *gen; |
---|
2089 | int error = ISAKMP_INTERNAL_ERROR; |
---|
2090 | |
---|
2091 | /* create buffer for isakmp payload */ |
---|
2092 | tlen = sizeof(*isakmp) |
---|
2093 | + sizeof(*gen) + hash->l |
---|
2094 | + body->l; |
---|
2095 | buf = vmalloc(tlen); |
---|
2096 | if (buf == NULL) { |
---|
2097 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2098 | "failed to get buffer to send.\n"); |
---|
2099 | goto end; |
---|
2100 | } |
---|
2101 | |
---|
2102 | /* re-set encryption flag, for serurity. */ |
---|
2103 | iph2->flags |= ISAKMP_FLAG_E; |
---|
2104 | |
---|
2105 | /* set isakmp header */ |
---|
2106 | p = set_isakmp_header2(buf, iph2, ISAKMP_NPTYPE_HASH); |
---|
2107 | if (p == NULL) |
---|
2108 | goto end; |
---|
2109 | |
---|
2110 | /* add HASH payload */ |
---|
2111 | /* XXX is next type always SA ? */ |
---|
2112 | p = set_isakmp_payload(p, hash, ISAKMP_NPTYPE_SA); |
---|
2113 | |
---|
2114 | /* add body payload */ |
---|
2115 | memcpy(p, body->v, body->l); |
---|
2116 | |
---|
2117 | #ifdef HAVE_PRINT_ISAKMP_C |
---|
2118 | isakmp_printpacket(buf, iph2->ph1->local, iph2->ph1->remote, 1); |
---|
2119 | #endif |
---|
2120 | |
---|
2121 | /* encoding */ |
---|
2122 | new = oakley_do_encrypt(iph2->ph1, buf, iph2->ivm->ive, iph2->ivm->iv); |
---|
2123 | |
---|
2124 | if (new == NULL) |
---|
2125 | goto end; |
---|
2126 | |
---|
2127 | vfree(buf); |
---|
2128 | |
---|
2129 | buf = new; |
---|
2130 | |
---|
2131 | error = 0; |
---|
2132 | |
---|
2133 | end: |
---|
2134 | if (error && buf != NULL) { |
---|
2135 | vfree(buf); |
---|
2136 | buf = NULL; |
---|
2137 | } |
---|
2138 | |
---|
2139 | return buf; |
---|
2140 | } |
---|
2141 | |
---|
2142 | /* |
---|
2143 | * get remote's sainfo. |
---|
2144 | * NOTE: this function is for responder. |
---|
2145 | */ |
---|
2146 | static int |
---|
2147 | get_sainfo_r(iph2) |
---|
2148 | struct ph2handle *iph2; |
---|
2149 | { |
---|
2150 | vchar_t *idsrc = NULL, *iddst = NULL, *client = NULL; |
---|
2151 | int error = ISAKMP_INTERNAL_ERROR; |
---|
2152 | |
---|
2153 | if (iph2->id == NULL) { |
---|
2154 | idsrc = ipsecdoi_sockaddr2id(iph2->src, IPSECDOI_PREFIX_HOST, |
---|
2155 | IPSEC_ULPROTO_ANY); |
---|
2156 | } else { |
---|
2157 | idsrc = vdup(iph2->id); |
---|
2158 | } |
---|
2159 | if (idsrc == NULL) { |
---|
2160 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2161 | "failed to set ID for source.\n"); |
---|
2162 | goto end; |
---|
2163 | } |
---|
2164 | |
---|
2165 | if (iph2->id_p == NULL) { |
---|
2166 | iddst = ipsecdoi_sockaddr2id(iph2->dst, IPSECDOI_PREFIX_HOST, |
---|
2167 | IPSEC_ULPROTO_ANY); |
---|
2168 | } else { |
---|
2169 | iddst = vdup(iph2->id_p); |
---|
2170 | } |
---|
2171 | if (iddst == NULL) { |
---|
2172 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2173 | "failed to set ID for destination.\n"); |
---|
2174 | goto end; |
---|
2175 | } |
---|
2176 | |
---|
2177 | #ifdef ENABLE_HYBRID |
---|
2178 | |
---|
2179 | /* clientaddr check : obtain modecfg address */ |
---|
2180 | if (iph2->ph1->mode_cfg != NULL) { |
---|
2181 | if ((iph2->ph1->mode_cfg->flags & ISAKMP_CFG_ADDR4_EXTERN) || |
---|
2182 | (iph2->ph1->mode_cfg->flags & ISAKMP_CFG_ADDR4_LOCAL)){ |
---|
2183 | struct sockaddr saddr; |
---|
2184 | saddr.sa_family = AF_INET; |
---|
2185 | #ifndef __linux__ |
---|
2186 | saddr.sa_len = sizeof(struct sockaddr_in); |
---|
2187 | #endif |
---|
2188 | ((struct sockaddr_in *)&saddr)->sin_port = IPSEC_PORT_ANY; |
---|
2189 | memcpy(&((struct sockaddr_in *)&saddr)->sin_addr, |
---|
2190 | &iph2->ph1->mode_cfg->addr4, sizeof(struct in_addr)); |
---|
2191 | client = ipsecdoi_sockaddr2id(&saddr, 32, IPSEC_ULPROTO_ANY); |
---|
2192 | } |
---|
2193 | } |
---|
2194 | |
---|
2195 | /* clientaddr check, fallback to peer address */ |
---|
2196 | if (client == NULL) |
---|
2197 | { |
---|
2198 | client = ipsecdoi_sockaddr2id(iph2->dst, IPSECDOI_PREFIX_HOST, |
---|
2199 | IPSEC_ULPROTO_ANY); |
---|
2200 | } |
---|
2201 | #endif |
---|
2202 | |
---|
2203 | /* obtain a matching sainfo section */ |
---|
2204 | iph2->sainfo = getsainfo(idsrc, iddst, iph2->ph1->id_p, client, iph2->ph1->rmconf->ph1id); |
---|
2205 | if (iph2->sainfo == NULL) { |
---|
2206 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2207 | "failed to get sainfo.\n"); |
---|
2208 | goto end; |
---|
2209 | } |
---|
2210 | |
---|
2211 | #ifdef ENABLE_HYBRID |
---|
2212 | /* xauth group inclusion check */ |
---|
2213 | if (iph2->sainfo->group != NULL) |
---|
2214 | if(group_check(iph2->ph1,&iph2->sainfo->group->v,1)) |
---|
2215 | goto end; |
---|
2216 | #endif |
---|
2217 | |
---|
2218 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2219 | "selected sainfo: %s\n", sainfo2str(iph2->sainfo)); |
---|
2220 | |
---|
2221 | error = 0; |
---|
2222 | end: |
---|
2223 | if (idsrc) |
---|
2224 | vfree(idsrc); |
---|
2225 | if (iddst) |
---|
2226 | vfree(iddst); |
---|
2227 | if (client) |
---|
2228 | vfree(client); |
---|
2229 | |
---|
2230 | return error; |
---|
2231 | } |
---|
2232 | |
---|
2233 | /* |
---|
2234 | * Copy both IP addresses in ID payloads into [src,dst]_id if both ID types |
---|
2235 | * are IP address and same address family. |
---|
2236 | * Then get remote's policy from SPD copied from kernel. |
---|
2237 | * If the type of ID payload is address or subnet type, then the index is |
---|
2238 | * made from the payload. If there is no ID payload, or the type of ID |
---|
2239 | * payload is NOT address type, then the index is made from the address |
---|
2240 | * pair of phase 1. |
---|
2241 | * NOTE: This function is only for responder. |
---|
2242 | */ |
---|
2243 | static int |
---|
2244 | get_proposal_r(iph2) |
---|
2245 | struct ph2handle *iph2; |
---|
2246 | { |
---|
2247 | struct policyindex spidx; |
---|
2248 | struct secpolicy *sp_in, *sp_out; |
---|
2249 | int idi2type = 0; /* switch whether copy IDs into id[src,dst]. */ |
---|
2250 | int error = ISAKMP_INTERNAL_ERROR; |
---|
2251 | |
---|
2252 | /* check the existence of ID payload */ |
---|
2253 | if ((iph2->id_p != NULL && iph2->id == NULL) |
---|
2254 | || (iph2->id_p == NULL && iph2->id != NULL)) { |
---|
2255 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2256 | "Both IDs wasn't found in payload.\n"); |
---|
2257 | return ISAKMP_NTYPE_INVALID_ID_INFORMATION; |
---|
2258 | } |
---|
2259 | |
---|
2260 | /* make sure if sa_[src, dst] are null. */ |
---|
2261 | if (iph2->sa_src || iph2->sa_dst) { |
---|
2262 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2263 | "Why do ID[src,dst] exist already.\n"); |
---|
2264 | return ISAKMP_INTERNAL_ERROR; |
---|
2265 | } |
---|
2266 | |
---|
2267 | memset(&spidx, 0, sizeof(spidx)); |
---|
2268 | |
---|
2269 | #define _XIDT(d) ((struct ipsecdoi_id_b *)(d)->v)->type |
---|
2270 | |
---|
2271 | /* make a spidx; a key to search SPD */ |
---|
2272 | spidx.dir = IPSEC_DIR_INBOUND; |
---|
2273 | spidx.ul_proto = 0; |
---|
2274 | |
---|
2275 | /* |
---|
2276 | * make destination address in spidx from either ID payload |
---|
2277 | * or phase 1 address into a address in spidx. |
---|
2278 | */ |
---|
2279 | if (iph2->id != NULL |
---|
2280 | && (_XIDT(iph2->id) == IPSECDOI_ID_IPV4_ADDR |
---|
2281 | || _XIDT(iph2->id) == IPSECDOI_ID_IPV6_ADDR |
---|
2282 | || _XIDT(iph2->id) == IPSECDOI_ID_IPV4_ADDR_SUBNET |
---|
2283 | || _XIDT(iph2->id) == IPSECDOI_ID_IPV6_ADDR_SUBNET)) { |
---|
2284 | /* get a destination address of a policy */ |
---|
2285 | error = ipsecdoi_id2sockaddr(iph2->id, |
---|
2286 | (struct sockaddr *)&spidx.dst, |
---|
2287 | &spidx.prefd, &spidx.ul_proto); |
---|
2288 | if (error) |
---|
2289 | return error; |
---|
2290 | |
---|
2291 | #ifdef INET6 |
---|
2292 | /* |
---|
2293 | * get scopeid from the SA address. |
---|
2294 | * note that the phase 1 source address is used as |
---|
2295 | * a destination address to search for a inbound policy entry |
---|
2296 | * because rcoon is responder. |
---|
2297 | */ |
---|
2298 | if (_XIDT(iph2->id) == IPSECDOI_ID_IPV6_ADDR) { |
---|
2299 | error = setscopeid((struct sockaddr *)&spidx.dst, |
---|
2300 | iph2->src); |
---|
2301 | if (error) |
---|
2302 | return error; |
---|
2303 | } |
---|
2304 | #endif |
---|
2305 | |
---|
2306 | if (_XIDT(iph2->id) == IPSECDOI_ID_IPV4_ADDR |
---|
2307 | || _XIDT(iph2->id) == IPSECDOI_ID_IPV6_ADDR) |
---|
2308 | idi2type = _XIDT(iph2->id); |
---|
2309 | |
---|
2310 | } else { |
---|
2311 | |
---|
2312 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2313 | "get a destination address of SP index " |
---|
2314 | "from phase1 address " |
---|
2315 | "due to no ID payloads found " |
---|
2316 | "OR because ID type is not address.\n"); |
---|
2317 | |
---|
2318 | /* |
---|
2319 | * copy the SOURCE address of IKE into the DESTINATION address |
---|
2320 | * of the key to search the SPD because the direction of policy |
---|
2321 | * is inbound. |
---|
2322 | */ |
---|
2323 | memcpy(&spidx.dst, iph2->src, sysdep_sa_len(iph2->src)); |
---|
2324 | switch (spidx.dst.ss_family) { |
---|
2325 | case AF_INET: |
---|
2326 | spidx.prefd = sizeof(struct in_addr) << 3; |
---|
2327 | break; |
---|
2328 | #ifdef INET6 |
---|
2329 | case AF_INET6: |
---|
2330 | spidx.prefd = sizeof(struct in6_addr) << 3; |
---|
2331 | break; |
---|
2332 | #endif |
---|
2333 | default: |
---|
2334 | spidx.prefd = 0; |
---|
2335 | break; |
---|
2336 | } |
---|
2337 | } |
---|
2338 | |
---|
2339 | /* make source address in spidx */ |
---|
2340 | if (iph2->id_p != NULL |
---|
2341 | && (_XIDT(iph2->id_p) == IPSECDOI_ID_IPV4_ADDR |
---|
2342 | || _XIDT(iph2->id_p) == IPSECDOI_ID_IPV6_ADDR |
---|
2343 | || _XIDT(iph2->id_p) == IPSECDOI_ID_IPV4_ADDR_SUBNET |
---|
2344 | || _XIDT(iph2->id_p) == IPSECDOI_ID_IPV6_ADDR_SUBNET)) { |
---|
2345 | /* get a source address of inbound SA */ |
---|
2346 | error = ipsecdoi_id2sockaddr(iph2->id_p, |
---|
2347 | (struct sockaddr *)&spidx.src, |
---|
2348 | &spidx.prefs, &spidx.ul_proto); |
---|
2349 | if (error) |
---|
2350 | return error; |
---|
2351 | |
---|
2352 | #ifdef INET6 |
---|
2353 | /* |
---|
2354 | * get scopeid from the SA address. |
---|
2355 | * for more detail, see above of this function. |
---|
2356 | */ |
---|
2357 | if (_XIDT(iph2->id_p) == IPSECDOI_ID_IPV6_ADDR) { |
---|
2358 | error = setscopeid((struct sockaddr *)&spidx.src, |
---|
2359 | iph2->dst); |
---|
2360 | if (error) |
---|
2361 | return error; |
---|
2362 | } |
---|
2363 | #endif |
---|
2364 | |
---|
2365 | /* Before setting iph2->[sa_src, sa_dst] with the addresses |
---|
2366 | * provided in ID payloads, we check: |
---|
2367 | * - they are both addresses of same family |
---|
2368 | * - sainfo has not been selected only based on ID payload |
---|
2369 | * information but also based on specific Phase 1 |
---|
2370 | * credentials (iph2->sainfo->id_i is defined), i.e. |
---|
2371 | * local configuration _explicitly_ expect that user |
---|
2372 | * (e.g. from asn1dn "C=FR, ...") with those IDs) */ |
---|
2373 | if (_XIDT(iph2->id_p) == idi2type && |
---|
2374 | spidx.dst.ss_family == spidx.src.ss_family && |
---|
2375 | iph2->sainfo && iph2->sainfo->id_i) { |
---|
2376 | |
---|
2377 | iph2->sa_src = dupsaddr((struct sockaddr *)&spidx.dst); |
---|
2378 | if (iph2->sa_src == NULL) { |
---|
2379 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2380 | "buffer allocation failed.\n"); |
---|
2381 | return ISAKMP_INTERNAL_ERROR; |
---|
2382 | } |
---|
2383 | |
---|
2384 | iph2->sa_dst = dupsaddr((struct sockaddr *)&spidx.src); |
---|
2385 | if (iph2->sa_dst == NULL) { |
---|
2386 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2387 | "buffer allocation failed.\n"); |
---|
2388 | return ISAKMP_INTERNAL_ERROR; |
---|
2389 | } |
---|
2390 | } else { |
---|
2391 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2392 | "Either family (%d - %d), types (%d - %d) of ID " |
---|
2393 | "from initiator differ or matching sainfo " |
---|
2394 | "has no id_i defined for the peer. Not filling " |
---|
2395 | "iph2->sa_src and iph2->sa_dst.\n", |
---|
2396 | spidx.src.ss_family, spidx.dst.ss_family, |
---|
2397 | _XIDT(iph2->id_p),idi2type); |
---|
2398 | } |
---|
2399 | #ifdef ENABLE_NATT |
---|
2400 | if (iph2->ph1->natt_flags & NAT_DETECTED_PEER) { |
---|
2401 | u_int16_t port; |
---|
2402 | |
---|
2403 | port = extract_port(&spidx.src); |
---|
2404 | memcpy(&spidx.src, iph2->ph1->remote, |
---|
2405 | sysdep_sa_len(iph2->ph1->remote)); |
---|
2406 | set_port(&spidx.src, port); |
---|
2407 | switch (spidx.src.ss_family) { |
---|
2408 | case AF_INET: |
---|
2409 | spidx.prefs = sizeof(struct in_addr) << 3; |
---|
2410 | break; |
---|
2411 | #ifdef INET6 |
---|
2412 | case AF_INET6: |
---|
2413 | spidx.prefs = sizeof(struct in6_addr) << 3; |
---|
2414 | break; |
---|
2415 | #endif |
---|
2416 | default: |
---|
2417 | spidx.prefs = 0; |
---|
2418 | break; |
---|
2419 | } |
---|
2420 | plog(LLV_DEBUG, LOCATION, |
---|
2421 | NULL, "use NAT address %s as src\n", |
---|
2422 | saddr2str((struct sockaddr *)&spidx.src)); |
---|
2423 | } |
---|
2424 | #endif |
---|
2425 | } else { |
---|
2426 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2427 | "get a source address of SP index from Phase 1" |
---|
2428 | "addresses due to no ID payloads found" |
---|
2429 | "OR because ID type is not address.\n"); |
---|
2430 | |
---|
2431 | /* see above comment. */ |
---|
2432 | memcpy(&spidx.src, iph2->dst, sysdep_sa_len(iph2->dst)); |
---|
2433 | switch (spidx.src.ss_family) { |
---|
2434 | case AF_INET: |
---|
2435 | spidx.prefs = sizeof(struct in_addr) << 3; |
---|
2436 | break; |
---|
2437 | #ifdef INET6 |
---|
2438 | case AF_INET6: |
---|
2439 | spidx.prefs = sizeof(struct in6_addr) << 3; |
---|
2440 | break; |
---|
2441 | #endif |
---|
2442 | default: |
---|
2443 | spidx.prefs = 0; |
---|
2444 | break; |
---|
2445 | } |
---|
2446 | } |
---|
2447 | |
---|
2448 | #undef _XIDT |
---|
2449 | |
---|
2450 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2451 | "get src address from ID payload " |
---|
2452 | "%s prefixlen=%u ul_proto=%u\n", |
---|
2453 | saddr2str((struct sockaddr *)&spidx.src), |
---|
2454 | spidx.prefs, spidx.ul_proto); |
---|
2455 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2456 | "get dst address from ID payload " |
---|
2457 | "%s prefixlen=%u ul_proto=%u\n", |
---|
2458 | saddr2str((struct sockaddr *)&spidx.dst), |
---|
2459 | spidx.prefd, spidx.ul_proto); |
---|
2460 | |
---|
2461 | /* |
---|
2462 | * convert the ul_proto if it is 0 |
---|
2463 | * because 0 in ID payload means a wild card. |
---|
2464 | */ |
---|
2465 | if (spidx.ul_proto == 0) |
---|
2466 | spidx.ul_proto = IPSEC_ULPROTO_ANY; |
---|
2467 | |
---|
2468 | #ifdef HAVE_SECCTX |
---|
2469 | /* |
---|
2470 | * Need to use security context in spidx to ensure the correct |
---|
2471 | * policy is selected. The only way to get the security context |
---|
2472 | * is to look into the proposal sent by peer ahead of time. |
---|
2473 | */ |
---|
2474 | if (get_security_context(iph2->sa, &spidx)) { |
---|
2475 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2476 | "error occurred trying to get security context.\n"); |
---|
2477 | return ISAKMP_INTERNAL_ERROR; |
---|
2478 | } |
---|
2479 | #endif /* HAVE_SECCTX */ |
---|
2480 | |
---|
2481 | /* get inbound policy */ |
---|
2482 | sp_in = getsp_r(&spidx); |
---|
2483 | if (sp_in == NULL) { |
---|
2484 | if (iph2->ph1->rmconf->gen_policy) { |
---|
2485 | plog(LLV_INFO, LOCATION, NULL, |
---|
2486 | "no policy found, " |
---|
2487 | "try to generate the policy : %s\n", |
---|
2488 | spidx2str(&spidx)); |
---|
2489 | iph2->spidx_gen = racoon_malloc(sizeof(spidx)); |
---|
2490 | if (!iph2->spidx_gen) { |
---|
2491 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2492 | "buffer allocation failed.\n"); |
---|
2493 | return ISAKMP_INTERNAL_ERROR; |
---|
2494 | } |
---|
2495 | memcpy(iph2->spidx_gen, &spidx, sizeof(spidx)); |
---|
2496 | return -2; /* special value */ |
---|
2497 | } |
---|
2498 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2499 | "no policy found: %s\n", spidx2str(&spidx)); |
---|
2500 | return ISAKMP_INTERNAL_ERROR; |
---|
2501 | } |
---|
2502 | /* Refresh existing generated policies |
---|
2503 | */ |
---|
2504 | if (iph2->ph1->rmconf->gen_policy) { |
---|
2505 | plog(LLV_INFO, LOCATION, NULL, |
---|
2506 | "Update the generated policy : %s\n", |
---|
2507 | spidx2str(&spidx)); |
---|
2508 | iph2->spidx_gen = racoon_malloc(sizeof(spidx)); |
---|
2509 | if (!iph2->spidx_gen) { |
---|
2510 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2511 | "buffer allocation failed.\n"); |
---|
2512 | return ISAKMP_INTERNAL_ERROR; |
---|
2513 | } |
---|
2514 | memcpy(iph2->spidx_gen, &spidx, sizeof(spidx)); |
---|
2515 | } |
---|
2516 | |
---|
2517 | /* get outbound policy */ |
---|
2518 | { |
---|
2519 | struct sockaddr_storage addr; |
---|
2520 | u_int8_t pref; |
---|
2521 | |
---|
2522 | spidx.dir = IPSEC_DIR_OUTBOUND; |
---|
2523 | addr = spidx.src; |
---|
2524 | spidx.src = spidx.dst; |
---|
2525 | spidx.dst = addr; |
---|
2526 | pref = spidx.prefs; |
---|
2527 | spidx.prefs = spidx.prefd; |
---|
2528 | spidx.prefd = pref; |
---|
2529 | |
---|
2530 | sp_out = getsp_r(&spidx); |
---|
2531 | if (!sp_out) { |
---|
2532 | plog(LLV_WARNING, LOCATION, NULL, |
---|
2533 | "no outbound policy found: %s\n", |
---|
2534 | spidx2str(&spidx)); |
---|
2535 | } |
---|
2536 | } |
---|
2537 | |
---|
2538 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2539 | "suitable SP found:%s\n", spidx2str(&spidx)); |
---|
2540 | |
---|
2541 | /* |
---|
2542 | * In the responder side, the inbound policy should be using IPsec. |
---|
2543 | * outbound policy is not checked currently. |
---|
2544 | */ |
---|
2545 | if (sp_in->policy != IPSEC_POLICY_IPSEC) { |
---|
2546 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2547 | "policy found, but no IPsec required: %s\n", |
---|
2548 | spidx2str(&spidx)); |
---|
2549 | return ISAKMP_INTERNAL_ERROR; |
---|
2550 | } |
---|
2551 | |
---|
2552 | /* set new proposal derived from a policy into the iph2->proposal. */ |
---|
2553 | if (set_proposal_from_policy(iph2, sp_in, sp_out) < 0) { |
---|
2554 | plog(LLV_ERROR, LOCATION, NULL, |
---|
2555 | "failed to create saprop.\n"); |
---|
2556 | return ISAKMP_INTERNAL_ERROR; |
---|
2557 | } |
---|
2558 | |
---|
2559 | #ifdef HAVE_SECCTX |
---|
2560 | if (spidx.sec_ctx.ctx_str) { |
---|
2561 | set_secctx_in_proposal(iph2, spidx); |
---|
2562 | } |
---|
2563 | #endif /* HAVE_SECCTX */ |
---|
2564 | |
---|
2565 | iph2->spid = sp_in->id; |
---|
2566 | |
---|
2567 | return 0; |
---|
2568 | } |
---|
2569 | |
---|
2570 | /* |
---|
2571 | * handle a notification payload inside phase2 exchange. |
---|
2572 | * phase2 is always encrypted, so it does not need to be checked |
---|
2573 | * for explicitely. |
---|
2574 | */ |
---|
2575 | static int |
---|
2576 | ph2_recv_n(iph2, gen) |
---|
2577 | struct ph2handle *iph2; |
---|
2578 | struct isakmp_gen *gen; |
---|
2579 | { |
---|
2580 | struct ph1handle *iph1 = iph2->ph1; |
---|
2581 | struct isakmp_pl_n *notify = (struct isakmp_pl_n *) gen; |
---|
2582 | u_int type; |
---|
2583 | int check_level; |
---|
2584 | |
---|
2585 | type = ntohs(notify->type); |
---|
2586 | switch (type) { |
---|
2587 | case ISAKMP_NTYPE_CONNECTED: |
---|
2588 | break; |
---|
2589 | case ISAKMP_NTYPE_INITIAL_CONTACT: |
---|
2590 | return isakmp_info_recv_initialcontact(iph1, iph2); |
---|
2591 | case ISAKMP_NTYPE_RESPONDER_LIFETIME: |
---|
2592 | ipsecdoi_parse_responder_lifetime(notify, |
---|
2593 | &iph2->lifetime_secs, &iph2->lifetime_kb); |
---|
2594 | |
---|
2595 | if (iph1 != NULL && iph1->rmconf != NULL) { |
---|
2596 | check_level = iph1->rmconf->pcheck_level; |
---|
2597 | } else { |
---|
2598 | if (iph1 != NULL) |
---|
2599 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2600 | "No phase1 rmconf found !\n"); |
---|
2601 | else |
---|
2602 | plog(LLV_DEBUG, LOCATION, NULL, |
---|
2603 | "No phase1 found !\n"); |
---|
2604 | check_level = PROP_CHECK_EXACT; |
---|
2605 | } |
---|
2606 | |
---|
2607 | switch (check_level) { |
---|
2608 | case PROP_CHECK_OBEY: |
---|
2609 | break; |
---|
2610 | case PROP_CHECK_STRICT: |
---|
2611 | case PROP_CHECK_CLAIM: |
---|
2612 | if (iph2->sainfo == NULL |
---|
2613 | || iph2->sainfo->lifetime <= iph2->lifetime_secs) { |
---|
2614 | plog(LLV_WARNING, LOCATION, NULL, |
---|
2615 | "RESPONDER-LIFETIME: lifetime mismatch\n"); |
---|
2616 | iph2->lifetime_secs = 0; |
---|
2617 | } |
---|
2618 | break; |
---|
2619 | case PROP_CHECK_EXACT: |
---|
2620 | if (iph2->sainfo == NULL |
---|
2621 | || iph2->sainfo->lifetime != iph2->lifetime_secs) { |
---|
2622 | plog(LLV_WARNING, LOCATION, NULL, |
---|
2623 | "RESPONDER-LIFETIME: lifetime mismatch\n"); |
---|
2624 | iph2->lifetime_secs = 0; |
---|
2625 | } |
---|
2626 | break; |
---|
2627 | } |
---|
2628 | break; |
---|
2629 | default: |
---|
2630 | isakmp_log_notify(iph2->ph1, notify, "phase2 exchange"); |
---|
2631 | isakmp_info_send_n2(iph2, ISAKMP_NTYPE_INVALID_PAYLOAD_TYPE, |
---|
2632 | NULL); |
---|
2633 | break; |
---|
2634 | } |
---|
2635 | return 0; |
---|
2636 | } |
---|
2637 | |
---|
2638 | #ifdef __rtems__ |
---|
2639 | #include "rtems-bsd-racoon-isakmp_quick-data.h" |
---|
2640 | #endif /* __rtems__ */ |
---|