1 | /* sniffer.c
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2 | *
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3 | * Copyright (C) 2006-2020 wolfSSL Inc.
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4 | *
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5 | * This file is part of wolfSSL.
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6 | *
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7 | * wolfSSL is free software; you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation; either version 2 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * wolfSSL is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with this program; if not, write to the Free Software
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19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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20 | */
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21 |
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22 |
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23 | #ifdef HAVE_CONFIG_H
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24 | #include <config.h>
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25 | #endif
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26 |
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27 | #include <wolfssl/wolfcrypt/settings.h>
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28 |
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29 | #ifndef WOLFCRYPT_ONLY
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30 | #ifdef WOLFSSL_SNIFFER
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31 |
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32 | #include <assert.h>
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33 | #include <time.h>
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34 |
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35 | #ifndef _WIN32
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36 | #include <arpa/inet.h>
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37 | #else
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38 | #include <WS2tcpip.h>
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39 | #endif
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40 |
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41 | #ifdef _WIN32
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42 | #define SNPRINTF _snprintf
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43 | #else
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44 | #define SNPRINTF snprintf
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45 | #endif
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46 |
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47 | #include <wolfssl/openssl/ssl.h>
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48 | #include <wolfssl/internal.h>
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49 | #include <wolfssl/error-ssl.h>
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50 | #include <wolfssl/sniffer.h>
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51 | #include <wolfssl/sniffer_error.h>
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52 | #ifdef NO_INLINE
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53 | #include <wolfssl/wolfcrypt/misc.h>
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54 | #else
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55 | #define WOLFSSL_MISC_INCLUDED
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56 | #include <wolfcrypt/src/misc.c>
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57 | #endif
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58 |
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59 | #ifdef WOLF_CRYPTO_CB
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60 | #include <wolfssl/wolfcrypt/cryptocb.h>
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61 | #ifdef HAVE_INTEL_QA_SYNC
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62 | #include <wolfssl/wolfcrypt/port/intel/quickassist_sync.h>
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63 | #endif
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64 | #ifdef HAVE_CAVIUM_OCTEON_SYNC
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65 | #include <wolfssl/wolfcrypt/port/cavium/cavium_octeon_sync.h>
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66 | #endif
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67 | #endif
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68 |
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69 |
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70 | #ifndef WOLFSSL_SNIFFER_TIMEOUT
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71 | #define WOLFSSL_SNIFFER_TIMEOUT 900
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72 | /* Cache unclosed Sessions for 15 minutes since last used */
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73 | #endif
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74 |
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75 | /* Misc constants */
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76 | enum {
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77 | MAX_SERVER_ADDRESS = 128, /* maximum server address length */
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78 | MAX_SERVER_NAME = 128, /* maximum server name length */
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79 | MAX_ERROR_LEN = 80, /* maximum error length */
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80 | ETHER_IF_ADDR_LEN = 6, /* ethernet interface address length */
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81 | LOCAL_IF_ADDR_LEN = 4, /* localhost interface address length, !windows */
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82 | TCP_PROTO = 6, /* TCP_PROTOCOL */
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83 | IP_HDR_SZ = 20, /* IPv4 header length, min */
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84 | IP6_HDR_SZ = 40, /* IPv6 header length, min */
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85 | TCP_HDR_SZ = 20, /* TCP header length, min */
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86 | IPV4 = 4, /* IP version 4 */
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87 | IPV6 = 6, /* IP version 6 */
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88 | TCP_PROTOCOL = 6, /* TCP Protocol id */
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89 | NO_NEXT_HEADER = 59, /* IPv6 no headers follow */
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90 | TRACE_MSG_SZ = 80, /* Trace Message buffer size */
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91 | HASH_SIZE = 499, /* Session Hash Table Rows */
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92 | PSEUDO_HDR_SZ = 12, /* TCP Pseudo Header size in bytes */
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93 | FATAL_ERROR_STATE = 1, /* SnifferSession fatal error state */
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94 | TICKET_HINT_LEN = 4, /* Session Ticket Hint length */
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95 | EXT_TYPE_SZ = 2, /* Extension length */
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96 | MAX_INPUT_SZ = MAX_RECORD_SIZE + COMP_EXTRA + MAX_MSG_EXTRA +
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97 | MTU_EXTRA, /* Max input sz of reassembly */
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98 | EXT_MASTER_SECRET = 0x17, /* Extended Master Secret Extension ID */
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99 | TICKET_EXT_ID = 0x23 /* Session Ticket Extension ID */
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100 | };
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101 |
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102 |
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103 | #ifdef _WIN32
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104 |
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105 | static HMODULE dllModule; /* for error string resources */
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106 |
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107 | BOOL APIENTRY DllMain( HMODULE hModule,
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108 | DWORD ul_reason_for_call,
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109 | LPVOID lpReserved
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110 | )
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111 | {
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112 | static int didInit = 0;
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113 |
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114 | switch (ul_reason_for_call)
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115 | {
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116 | case DLL_PROCESS_ATTACH:
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117 | if (didInit == 0) {
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118 | dllModule = hModule;
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119 | ssl_InitSniffer();
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120 | didInit = 1;
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121 | }
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122 | break;
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123 | case DLL_THREAD_ATTACH:
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124 | break;
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125 | case DLL_THREAD_DETACH:
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126 | break;
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127 | case DLL_PROCESS_DETACH:
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128 | if (didInit) {
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129 | ssl_FreeSniffer();
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130 | didInit = 0;
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131 | }
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132 | break;
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133 | }
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134 | return TRUE;
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135 | }
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136 |
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137 | #endif /* _WIN32 */
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138 |
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139 |
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140 | static WOLFSSL_GLOBAL int TraceOn = 0; /* Trace is off by default */
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141 | static WOLFSSL_GLOBAL FILE* TraceFile = 0;
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142 |
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143 |
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144 | /* windows uses .rc table for this */
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145 | #ifndef _WIN32
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146 |
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147 | static const char* const msgTable[] =
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148 | {
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149 | /* 1 */
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150 | "Out of Memory",
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151 | "New SSL Sniffer Server Registered",
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152 | "Checking IP Header",
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153 | "SSL Sniffer Server Not Registered",
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154 | "Checking TCP Header",
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155 |
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156 | /* 6 */
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157 | "SSL Sniffer Server Port Not Registered",
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158 | "RSA Private Decrypt Error",
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159 | "RSA Private Decode Error",
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160 | "Set Cipher Spec Error",
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161 | "Server Hello Input Malformed",
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162 |
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163 | /* 11 */
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164 | "Couldn't Resume Session Error",
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165 | "Server Did Resumption",
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166 | "Client Hello Input Malformed",
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167 | "Client Trying to Resume",
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168 | "Handshake Input Malformed",
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169 |
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170 | /* 16 */
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171 | "Got Hello Verify msg",
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172 | "Got Server Hello msg",
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173 | "Got Cert Request msg",
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174 | "Got Server Key Exchange msg",
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175 | "Got Cert msg",
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176 |
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177 | /* 21 */
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178 | "Got Server Hello Done msg",
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179 | "Got Finished msg",
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180 | "Got Client Hello msg",
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181 | "Got Client Key Exchange msg",
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182 | "Got Cert Verify msg",
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183 |
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184 | /* 26 */
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185 | "Got Unknown Handshake msg",
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186 | "New SSL Sniffer Session created",
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187 | "Couldn't create new SSL",
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188 | "Got a Packet to decode",
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189 | "No data present",
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190 |
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191 | /* 31 */
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192 | "Session Not Found",
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193 | "Got an Old Client Hello msg",
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194 | "Old Client Hello Input Malformed",
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195 | "Old Client Hello OK",
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196 | "Bad Old Client Hello",
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197 |
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198 | /* 36 */
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199 | "Bad Record Header",
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200 | "Record Header Input Malformed",
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201 | "Got a HandShake msg",
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202 | "Bad HandShake msg",
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203 | "Got a Change Cipher Spec msg",
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204 |
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205 | /* 41 */
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206 | "Got Application Data msg",
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207 | "Bad Application Data",
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208 | "Got an Alert msg",
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209 | "Another msg to Process",
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210 | "Removing Session From Table",
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211 |
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212 | /* 46 */
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213 | "Bad Key File",
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214 | "Wrong IP Version",
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215 | "Wrong Protocol type",
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216 | "Packet Short for header processing",
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217 | "Got Unknown Record Type",
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218 |
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219 | /* 51 */
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220 | "Can't Open Trace File",
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221 | "Session in Fatal Error State",
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222 | "Partial SSL record received",
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223 | "Buffer Error, malformed input",
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224 | "Added to Partial Input",
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225 |
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226 | /* 56 */
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227 | "Received a Duplicate Packet",
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228 | "Received an Out of Order Packet",
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229 | "Received an Overlap Duplicate Packet",
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230 | "Received an Overlap Reassembly Begin Duplicate Packet",
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231 | "Received an Overlap Reassembly End Duplicate Packet",
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232 |
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233 | /* 61 */
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234 | "Missed the Client Hello Entirely",
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235 | "Got Hello Request msg",
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236 | "Got Session Ticket msg",
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237 | "Bad Input",
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238 | "Bad Decrypt Type",
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239 |
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240 | /* 66 */
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241 | "Bad Finished Message Processing",
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242 | "Bad Compression Type",
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243 | "Bad DeriveKeys Error",
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244 | "Saw ACK for Missing Packet Error",
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245 | "Bad Decrypt Operation",
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246 |
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247 | /* 71 */
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248 | "Decrypt Keys Not Set Up",
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249 | "Late Key Load Error",
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250 | "Got Certificate Status msg",
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251 | "RSA Key Missing Error",
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252 | "Secure Renegotiation Not Supported",
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253 |
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254 | /* 76 */
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255 | "Get Session Stats Failure",
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256 | "Reassembly Buffer Size Exceeded",
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257 | "Dropping Lost Fragment",
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258 | "Dropping Partial Record",
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259 | "Clear ACK Fault",
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260 |
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261 | /* 81 */
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262 | "Bad Decrypt Size",
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263 | "Extended Master Secret Hash Error",
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264 | "Handshake Message Split Across TLS Records",
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265 | "ECC Private Decode Error",
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266 | "ECC Public Decode Error",
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267 |
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268 | /* 86 */
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269 | "Watch callback not set",
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270 | "Watch hash failed",
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271 | "Watch callback failed",
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272 | "Bad Certificate Message",
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273 | "Store data callback not set",
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274 |
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275 | /* 91 */
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276 | "No data destination Error",
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277 | "Store data callback failed",
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278 | "Loading chain input"
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279 | };
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280 |
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281 |
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282 | /* *nix version uses table above */
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283 | static void GetError(int idx, char* str)
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284 | {
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285 | XSTRNCPY(str, msgTable[idx - 1], MAX_ERROR_LEN-1);
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286 | str[MAX_ERROR_LEN-1] = '\0';
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287 | }
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288 |
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289 |
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290 | #else /* _WIN32 */
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291 |
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292 |
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293 | /* Windows version uses .rc table */
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294 | static void GetError(int idx, char* buffer)
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295 | {
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296 | if (!LoadStringA(dllModule, idx, buffer, MAX_ERROR_LEN))
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297 | buffer[0] = 0;
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298 | }
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299 |
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300 |
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301 | #endif /* _WIN32 */
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302 |
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303 |
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304 | /* Packet Buffer for reassembly list and ready list */
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305 | typedef struct PacketBuffer {
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306 | word32 begin; /* relative sequence begin */
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307 | word32 end; /* relative sequence end */
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308 | byte* data; /* actual data */
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309 | struct PacketBuffer* next; /* next on reassembly list or ready list */
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310 | } PacketBuffer;
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311 |
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312 |
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313 | #ifdef HAVE_SNI
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314 |
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315 | /* NamedKey maps a SNI name to a specific private key */
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316 | typedef struct NamedKey {
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317 | char name[MAX_SERVER_NAME]; /* server DNS name */
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318 | word32 nameSz; /* size of server DNS name */
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319 | byte* key; /* DER private key */
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320 | word32 keySz; /* size of DER private key */
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321 | struct NamedKey* next; /* for list */
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322 | } NamedKey;
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323 |
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324 | #endif
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325 |
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326 |
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327 | typedef struct IpAddrInfo {
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328 | int version;
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329 | union {
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330 | word32 ip4;
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331 | byte ip6[16];
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332 | };
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333 | } IpAddrInfo;
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334 |
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335 |
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336 | /* Sniffer Server holds info for each server/port monitored */
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337 | typedef struct SnifferServer {
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338 | SSL_CTX* ctx; /* SSL context */
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339 | char address[MAX_SERVER_ADDRESS]; /* passed in server address */
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340 | IpAddrInfo server; /* network order address */
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341 | int port; /* server port */
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342 | #ifdef HAVE_SNI
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343 | NamedKey* namedKeys; /* mapping of names and keys */
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344 | wolfSSL_Mutex namedKeysMutex; /* mutex for namedKey list */
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345 | #endif
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346 | struct SnifferServer* next; /* for list */
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347 | } SnifferServer;
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348 |
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349 |
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350 | /* Session Flags */
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351 | typedef struct Flags {
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352 | byte side; /* which end is current packet headed */
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353 | byte serverCipherOn; /* indicates whether cipher is active */
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354 | byte clientCipherOn; /* indicates whether cipher is active */
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355 | byte resuming; /* did this session come from resumption */
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356 | byte cached; /* have we cached this session yet */
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357 | byte clientHello; /* processed client hello yet, for SSLv2 */
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358 | byte finCount; /* get both FINs before removing */
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359 | byte fatalError; /* fatal error state */
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360 | byte cliAckFault; /* client acked unseen data from server */
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361 | byte srvAckFault; /* server acked unseen data from client */
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362 | byte cliSkipPartial; /* client skips partial data to catch up */
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363 | byte srvSkipPartial; /* server skips partial data to catch up */
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364 | #ifdef HAVE_EXTENDED_MASTER
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365 | byte expectEms; /* expect extended master secret */
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366 | #endif
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367 | } Flags;
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368 |
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369 |
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370 | /* Out of Order FIN capture */
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371 | typedef struct FinCaputre {
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372 | word32 cliFinSeq; /* client relative sequence FIN 0 is no */
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373 | word32 srvFinSeq; /* server relative sequence FIN, 0 is no */
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374 | byte cliCounted; /* did we count yet, detects duplicates */
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375 | byte srvCounted; /* did we count yet, detects duplicates */
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376 | } FinCaputre;
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377 |
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378 |
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379 | typedef struct HsHashes {
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380 | #ifndef NO_OLD_TLS
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381 | #ifndef NO_SHA
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382 | wc_Sha hashSha;
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383 | #endif
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384 | #ifndef NO_MD5
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385 | wc_Md5 hashMd5;
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386 | #endif
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387 | #endif
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388 | #ifndef NO_SHA256
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389 | wc_Sha256 hashSha256;
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390 | #endif
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391 | #ifdef WOLFSSL_SHA384
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392 | wc_Sha384 hashSha384;
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393 | #endif
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394 | } HsHashes;
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395 |
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396 |
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397 | /* Sniffer Session holds info for each client/server SSL/TLS session */
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398 | typedef struct SnifferSession {
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399 | SnifferServer* context; /* server context */
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400 | SSL* sslServer; /* SSL server side decode */
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401 | SSL* sslClient; /* SSL client side decode */
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402 | IpAddrInfo server; /* server address in network byte order */
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403 | IpAddrInfo client; /* client address in network byte order */
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404 | word16 srvPort; /* server port */
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405 | word16 cliPort; /* client port */
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406 | word32 cliSeqStart; /* client start sequence */
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407 | word32 srvSeqStart; /* server start sequence */
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408 | word32 cliExpected; /* client expected sequence (relative) */
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409 | word32 srvExpected; /* server expected sequence (relative) */
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410 | FinCaputre finCaputre; /* retain out of order FIN s */
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411 | Flags flags; /* session flags */
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412 | time_t lastUsed; /* last used ticks */
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413 | word32 keySz; /* size of the private key */
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414 | PacketBuffer* cliReassemblyList; /* client out of order packets */
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415 | PacketBuffer* srvReassemblyList; /* server out of order packets */
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416 | word32 cliReassemblyMemory; /* client packet memory used */
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417 | word32 srvReassemblyMemory; /* server packet memory used */
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418 | struct SnifferSession* next; /* for hash table list */
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419 | byte* ticketID; /* mac ID of session ticket */
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420 | #ifdef HAVE_SNI
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421 | const char* sni; /* server name indication */
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422 | #endif
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423 | #ifdef HAVE_EXTENDED_MASTER
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424 | HsHashes* hash;
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425 | #endif
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426 | } SnifferSession;
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427 |
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428 |
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429 | /* Sniffer Server List and mutex */
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430 | static WOLFSSL_GLOBAL SnifferServer* ServerList = 0;
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431 | static WOLFSSL_GLOBAL wolfSSL_Mutex ServerListMutex;
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432 |
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433 |
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434 | /* Session Hash Table, mutex, and count */
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435 | static WOLFSSL_GLOBAL SnifferSession* SessionTable[HASH_SIZE];
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436 | static WOLFSSL_GLOBAL wolfSSL_Mutex SessionMutex;
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437 | static WOLFSSL_GLOBAL int SessionCount = 0;
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438 |
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439 | /* Recovery of missed data switches and stats */
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440 | static WOLFSSL_GLOBAL wolfSSL_Mutex RecoveryMutex; /* for stats */
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441 | static WOLFSSL_GLOBAL int RecoveryEnabled = 0; /* global switch */
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442 | static WOLFSSL_GLOBAL int MaxRecoveryMemory = -1;
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443 | /* per session max recovery memory */
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444 | static WOLFSSL_GLOBAL word32 MissedDataSessions = 0;
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445 | /* # of sessions with missed data */
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446 |
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447 | /* Connection Info Callback */
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448 | static WOLFSSL_GLOBAL SSLConnCb ConnectionCb;
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449 | static WOLFSSL_GLOBAL void* ConnectionCbCtx = NULL;
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450 |
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451 | #ifdef WOLFSSL_SNIFFER_STATS
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452 | /* Sessions Statistics */
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453 | static WOLFSSL_GLOBAL SSLStats SnifferStats;
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454 | static WOLFSSL_GLOBAL wolfSSL_Mutex StatsMutex;
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455 | #endif
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456 |
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457 | #ifdef WOLFSSL_SNIFFER_WATCH
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458 | /* Watch Key Callback */
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459 | static WOLFSSL_GLOBAL SSLWatchCb WatchCb;
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460 | static WOLFSSL_GLOBAL void* WatchCbCtx = NULL;
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461 | #endif
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462 |
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463 | #ifdef WOLFSSL_SNIFFER_STORE_DATA_CB
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464 | /* Store Data Callback */
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465 | static WOLFSSL_GLOBAL SSLStoreDataCb StoreDataCb;
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466 | #endif
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467 |
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468 |
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469 | static void UpdateMissedDataSessions(void)
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470 | {
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471 | wc_LockMutex(&RecoveryMutex);
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472 | MissedDataSessions += 1;
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473 | wc_UnLockMutex(&RecoveryMutex);
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474 | }
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475 |
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476 |
|
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477 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
478 | #define LOCK_STAT() do { wc_LockMutex(&StatsMutex); } while (0)
|
---|
479 | #define UNLOCK_STAT() do { wc_UnLockMutex(&StatsMutex); } while (0)
|
---|
480 | #define NOLOCK_ADD_TO_STAT(x,y) do { TraceStat(#x, y); x += y; } while (0)
|
---|
481 | #define NOLOCK_INC_STAT(x) NOLOCK_ADD_TO_STAT(x,1)
|
---|
482 | #define ADD_TO_STAT(x,y) do { LOCK_STAT(); \
|
---|
483 | NOLOCK_ADD_TO_STAT(x,y); UNLOCK_STAT(); } while (0)
|
---|
484 | #define INC_STAT(x) do { LOCK_STAT(); \
|
---|
485 | NOLOCK_INC_STAT(x); UNLOCK_STAT(); } while (0)
|
---|
486 | #endif
|
---|
487 |
|
---|
488 |
|
---|
489 | #ifdef WOLF_CRYPTO_CB
|
---|
490 | static WOLFSSL_GLOBAL int CryptoDeviceId = INVALID_DEVID;
|
---|
491 | #endif
|
---|
492 |
|
---|
493 |
|
---|
494 | /* Initialize overall Sniffer */
|
---|
495 | void ssl_InitSniffer(void)
|
---|
496 | {
|
---|
497 | wolfSSL_Init();
|
---|
498 | wc_InitMutex(&ServerListMutex);
|
---|
499 | wc_InitMutex(&SessionMutex);
|
---|
500 | wc_InitMutex(&RecoveryMutex);
|
---|
501 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
502 | XMEMSET(&SnifferStats, 0, sizeof(SSLStats));
|
---|
503 | wc_InitMutex(&StatsMutex);
|
---|
504 | #endif
|
---|
505 | #ifdef WOLF_CRYPTO_CB
|
---|
506 | #ifdef HAVE_INTEL_QA_SYNC
|
---|
507 | CryptoDeviceId = wc_CryptoCb_InitIntelQa();
|
---|
508 | if (INVALID_DEVID == CryptoDeviceId) {
|
---|
509 | printf("Couldn't init the Intel QA\n");
|
---|
510 | }
|
---|
511 | #endif
|
---|
512 | #ifdef HAVE_CAVIUM_OCTEON_SYNC
|
---|
513 | CryptoDeviceId = wc_CryptoCb_InitOcteon();
|
---|
514 | if (INVALID_DEVID == CryptoDeviceId) {
|
---|
515 | printf("Couldn't init the Intel QA\n");
|
---|
516 | }
|
---|
517 | #endif
|
---|
518 | #endif
|
---|
519 | }
|
---|
520 |
|
---|
521 |
|
---|
522 | #ifdef HAVE_SNI
|
---|
523 |
|
---|
524 | /* Free Named Key and the zero out the private key it holds */
|
---|
525 | static void FreeNamedKey(NamedKey* in)
|
---|
526 | {
|
---|
527 | if (in) {
|
---|
528 | if (in->key) {
|
---|
529 | ForceZero(in->key, in->keySz);
|
---|
530 | XFREE(in->key, NULL, DYNAMIC_TYPE_X509);
|
---|
531 | }
|
---|
532 | XFREE(in, NULL, DYNAMIC_TYPE_SNIFFER_NAMED_KEY);
|
---|
533 | }
|
---|
534 | }
|
---|
535 |
|
---|
536 |
|
---|
537 | static void FreeNamedKeyList(NamedKey* in)
|
---|
538 | {
|
---|
539 | NamedKey* next;
|
---|
540 |
|
---|
541 | while (in) {
|
---|
542 | next = in->next;
|
---|
543 | FreeNamedKey(in);
|
---|
544 | in = next;
|
---|
545 | }
|
---|
546 | }
|
---|
547 |
|
---|
548 | #endif
|
---|
549 |
|
---|
550 |
|
---|
551 | /* Free Sniffer Server's resources/self */
|
---|
552 | static void FreeSnifferServer(SnifferServer* srv)
|
---|
553 | {
|
---|
554 | if (srv) {
|
---|
555 | #ifdef HAVE_SNI
|
---|
556 | wc_LockMutex(&srv->namedKeysMutex);
|
---|
557 | FreeNamedKeyList(srv->namedKeys);
|
---|
558 | wc_UnLockMutex(&srv->namedKeysMutex);
|
---|
559 | wc_FreeMutex(&srv->namedKeysMutex);
|
---|
560 | #endif
|
---|
561 | SSL_CTX_free(srv->ctx);
|
---|
562 | }
|
---|
563 | XFREE(srv, NULL, DYNAMIC_TYPE_SNIFFER_SERVER);
|
---|
564 | }
|
---|
565 |
|
---|
566 |
|
---|
567 | /* free PacketBuffer's resources/self */
|
---|
568 | static void FreePacketBuffer(PacketBuffer* del)
|
---|
569 | {
|
---|
570 | if (del) {
|
---|
571 | XFREE(del->data, NULL, DYNAMIC_TYPE_SNIFFER_PB_BUFFER);
|
---|
572 | XFREE(del, NULL, DYNAMIC_TYPE_SNIFFER_PB);
|
---|
573 | }
|
---|
574 | }
|
---|
575 |
|
---|
576 |
|
---|
577 | /* remove PacketBuffer List */
|
---|
578 | static void FreePacketList(PacketBuffer* in)
|
---|
579 | {
|
---|
580 | if (in) {
|
---|
581 | PacketBuffer* del;
|
---|
582 | PacketBuffer* packet = in;
|
---|
583 |
|
---|
584 | while (packet) {
|
---|
585 | del = packet;
|
---|
586 | packet = packet->next;
|
---|
587 | FreePacketBuffer(del);
|
---|
588 | }
|
---|
589 | }
|
---|
590 | }
|
---|
591 |
|
---|
592 |
|
---|
593 | /* Free Sniffer Session's resources/self */
|
---|
594 | static void FreeSnifferSession(SnifferSession* session)
|
---|
595 | {
|
---|
596 | if (session) {
|
---|
597 | SSL_free(session->sslClient);
|
---|
598 | SSL_free(session->sslServer);
|
---|
599 |
|
---|
600 | FreePacketList(session->cliReassemblyList);
|
---|
601 | FreePacketList(session->srvReassemblyList);
|
---|
602 |
|
---|
603 | XFREE(session->ticketID, NULL, DYNAMIC_TYPE_SNIFFER_TICKET_ID);
|
---|
604 | #ifdef HAVE_EXTENDED_MASTER
|
---|
605 | XFREE(session->hash, NULL, DYNAMIC_TYPE_HASHES);
|
---|
606 | #endif
|
---|
607 | }
|
---|
608 | XFREE(session, NULL, DYNAMIC_TYPE_SNIFFER_SESSION);
|
---|
609 | }
|
---|
610 |
|
---|
611 |
|
---|
612 | /* Free overall Sniffer */
|
---|
613 | void ssl_FreeSniffer(void)
|
---|
614 | {
|
---|
615 | SnifferServer* srv;
|
---|
616 | SnifferServer* removeServer;
|
---|
617 | SnifferSession* session;
|
---|
618 | SnifferSession* removeSession;
|
---|
619 | int i;
|
---|
620 |
|
---|
621 | wc_LockMutex(&ServerListMutex);
|
---|
622 | wc_LockMutex(&SessionMutex);
|
---|
623 |
|
---|
624 | srv = ServerList;
|
---|
625 | while (srv) {
|
---|
626 | removeServer = srv;
|
---|
627 | srv = srv->next;
|
---|
628 | FreeSnifferServer(removeServer);
|
---|
629 | }
|
---|
630 |
|
---|
631 | for (i = 0; i < HASH_SIZE; i++) {
|
---|
632 | session = SessionTable[i];
|
---|
633 | while (session) {
|
---|
634 | removeSession = session;
|
---|
635 | session = session->next;
|
---|
636 | FreeSnifferSession(removeSession);
|
---|
637 | }
|
---|
638 | }
|
---|
639 |
|
---|
640 | wc_UnLockMutex(&SessionMutex);
|
---|
641 | wc_UnLockMutex(&ServerListMutex);
|
---|
642 |
|
---|
643 | wc_FreeMutex(&RecoveryMutex);
|
---|
644 | wc_FreeMutex(&SessionMutex);
|
---|
645 | wc_FreeMutex(&ServerListMutex);
|
---|
646 |
|
---|
647 | #ifdef WOLF_CRYPTO_CB
|
---|
648 | #ifdef HAVE_INTEL_QA_SYNC
|
---|
649 | wc_CryptoCb_CleanupIntelQa(&CryptoDeviceId);
|
---|
650 | #endif
|
---|
651 | #ifdef HAVE_CAVIUM_OCTEON_SYNC
|
---|
652 | wc_CryptoCb_CleanupOcteon(&CryptoDeviceId);
|
---|
653 | #endif
|
---|
654 | #endif
|
---|
655 |
|
---|
656 | if (TraceFile) {
|
---|
657 | TraceOn = 0;
|
---|
658 | fclose(TraceFile);
|
---|
659 | TraceFile = NULL;
|
---|
660 | }
|
---|
661 |
|
---|
662 | wolfSSL_Cleanup();
|
---|
663 | }
|
---|
664 |
|
---|
665 |
|
---|
666 | #ifdef HAVE_EXTENDED_MASTER
|
---|
667 |
|
---|
668 | static int HashInit(HsHashes* hash)
|
---|
669 | {
|
---|
670 | int ret = 0;
|
---|
671 |
|
---|
672 | XMEMSET(hash, 0, sizeof(HsHashes));
|
---|
673 |
|
---|
674 | #ifndef NO_OLD_TLS
|
---|
675 | #ifndef NO_SHA
|
---|
676 | if (ret == 0)
|
---|
677 | ret = wc_InitSha(&hash->hashSha);
|
---|
678 | #endif
|
---|
679 | #ifndef NO_MD5
|
---|
680 | if (ret == 0) {
|
---|
681 | ret = wc_InitMd5(&hash->hashMd5);
|
---|
682 | }
|
---|
683 | #endif
|
---|
684 | #endif
|
---|
685 | #ifndef NO_SHA256
|
---|
686 | if (ret == 0)
|
---|
687 | ret = wc_InitSha256(&hash->hashSha256);
|
---|
688 | #endif
|
---|
689 | #ifdef WOLFSSL_SHA384
|
---|
690 | if (ret == 0)
|
---|
691 | ret = wc_InitSha384(&hash->hashSha384);
|
---|
692 | #endif
|
---|
693 |
|
---|
694 | return ret;
|
---|
695 | }
|
---|
696 |
|
---|
697 |
|
---|
698 | static int HashUpdate(HsHashes* hash, const byte* input, int sz)
|
---|
699 | {
|
---|
700 | int ret = 0;
|
---|
701 |
|
---|
702 | input -= HANDSHAKE_HEADER_SZ;
|
---|
703 | sz += HANDSHAKE_HEADER_SZ;
|
---|
704 |
|
---|
705 | #ifndef NO_OLD_TLS
|
---|
706 | #ifndef NO_SHA
|
---|
707 | if (ret == 0)
|
---|
708 | ret = wc_ShaUpdate(&hash->hashSha, input, sz);
|
---|
709 | #endif
|
---|
710 | #ifndef NO_MD5
|
---|
711 | if (ret == 0) {
|
---|
712 | ret = wc_Md5Update(&hash->hashMd5, input, sz);
|
---|
713 | }
|
---|
714 | #endif
|
---|
715 | #endif
|
---|
716 | #ifndef NO_SHA256
|
---|
717 | if (ret == 0)
|
---|
718 | ret = wc_Sha256Update(&hash->hashSha256, input, sz);
|
---|
719 | #endif
|
---|
720 | #ifdef WOLFSSL_SHA384
|
---|
721 | if (ret == 0)
|
---|
722 | ret = wc_Sha384Update(&hash->hashSha384, input, sz);
|
---|
723 | #endif
|
---|
724 |
|
---|
725 | return ret;
|
---|
726 | }
|
---|
727 |
|
---|
728 |
|
---|
729 | static int HashCopy(HS_Hashes* d, HsHashes* s)
|
---|
730 | {
|
---|
731 | #ifndef NO_OLD_TLS
|
---|
732 | #ifndef NO_SHA
|
---|
733 | XMEMCPY(&d->hashSha, &s->hashSha, sizeof(wc_Sha));
|
---|
734 | #endif
|
---|
735 | #ifndef NO_MD5
|
---|
736 | XMEMCPY(&d->hashMd5, &s->hashMd5, sizeof(wc_Md5));
|
---|
737 | #endif
|
---|
738 | #endif
|
---|
739 |
|
---|
740 | #ifndef NO_SHA256
|
---|
741 | XMEMCPY(&d->hashSha256, &s->hashSha256, sizeof(wc_Sha256));
|
---|
742 | #endif
|
---|
743 | #ifdef WOLFSSL_SHA384
|
---|
744 | XMEMCPY(&d->hashSha384, &s->hashSha384, sizeof(wc_Sha384));
|
---|
745 | #endif
|
---|
746 |
|
---|
747 | return 0;
|
---|
748 | }
|
---|
749 |
|
---|
750 | #endif
|
---|
751 |
|
---|
752 |
|
---|
753 | /* Initialize a SnifferServer */
|
---|
754 | static void InitSnifferServer(SnifferServer* sniffer)
|
---|
755 | {
|
---|
756 | XMEMSET(sniffer, 0, sizeof(SnifferServer));
|
---|
757 | }
|
---|
758 |
|
---|
759 |
|
---|
760 | /* Initialize session flags */
|
---|
761 | static void InitFlags(Flags* flags)
|
---|
762 | {
|
---|
763 | XMEMSET(flags, 0, sizeof(Flags));
|
---|
764 | }
|
---|
765 |
|
---|
766 |
|
---|
767 | /* Initialize FIN Capture */
|
---|
768 | static void InitFinCapture(FinCaputre* cap)
|
---|
769 | {
|
---|
770 | XMEMSET(cap, 0, sizeof(FinCaputre));
|
---|
771 | }
|
---|
772 |
|
---|
773 |
|
---|
774 | /* Initialize a Sniffer Session */
|
---|
775 | static void InitSession(SnifferSession* session)
|
---|
776 | {
|
---|
777 | XMEMSET(session, 0, sizeof(SnifferSession));
|
---|
778 | InitFlags(&session->flags);
|
---|
779 | InitFinCapture(&session->finCaputre);
|
---|
780 | }
|
---|
781 |
|
---|
782 |
|
---|
783 | /* IP Info from IP Header */
|
---|
784 | typedef struct IpInfo {
|
---|
785 | int length; /* length of this header */
|
---|
786 | int total; /* total length of fragment */
|
---|
787 | IpAddrInfo src; /* network order source address */
|
---|
788 | IpAddrInfo dst; /* network order destination address */
|
---|
789 | } IpInfo;
|
---|
790 |
|
---|
791 |
|
---|
792 | /* TCP Info from TCP Header */
|
---|
793 | typedef struct TcpInfo {
|
---|
794 | int srcPort; /* source port */
|
---|
795 | int dstPort; /* source port */
|
---|
796 | int length; /* length of this header */
|
---|
797 | word32 sequence; /* sequence number */
|
---|
798 | word32 ackNumber; /* ack number */
|
---|
799 | byte fin; /* FIN set */
|
---|
800 | byte rst; /* RST set */
|
---|
801 | byte syn; /* SYN set */
|
---|
802 | byte ack; /* ACK set */
|
---|
803 | } TcpInfo;
|
---|
804 |
|
---|
805 |
|
---|
806 | /* Tcp Pseudo Header for Checksum calculation */
|
---|
807 | typedef struct TcpPseudoHdr {
|
---|
808 | word32 src; /* source address */
|
---|
809 | word32 dst; /* destination address */
|
---|
810 | byte rsv; /* reserved, always 0 */
|
---|
811 | byte protocol; /* IP protocol */
|
---|
812 | word16 length; /* tcp header length + data length (doesn't include */
|
---|
813 | /* pseudo header length) network order */
|
---|
814 | } TcpPseudoHdr;
|
---|
815 |
|
---|
816 |
|
---|
817 | /* Password Setting Callback */
|
---|
818 | static int SetPassword(char* passwd, int sz, int rw, void* userdata)
|
---|
819 | {
|
---|
820 | (void)rw;
|
---|
821 | XSTRNCPY(passwd, (const char*)userdata, sz);
|
---|
822 | return (int)XSTRLEN((const char*)userdata);
|
---|
823 | }
|
---|
824 |
|
---|
825 |
|
---|
826 | /* Ethernet Header */
|
---|
827 | typedef struct EthernetHdr {
|
---|
828 | byte dst[ETHER_IF_ADDR_LEN]; /* destination host address */
|
---|
829 | byte src[ETHER_IF_ADDR_LEN]; /* source host address */
|
---|
830 | word16 type; /* IP, ARP, etc */
|
---|
831 | } EthernetHdr;
|
---|
832 |
|
---|
833 |
|
---|
834 | /* IPv4 Header */
|
---|
835 | typedef struct IpHdr {
|
---|
836 | byte ver_hl; /* version/header length */
|
---|
837 | byte tos; /* type of service */
|
---|
838 | word16 length; /* total length */
|
---|
839 | word16 id; /* identification */
|
---|
840 | word16 offset; /* fragment offset field */
|
---|
841 | byte ttl; /* time to live */
|
---|
842 | byte protocol; /* protocol */
|
---|
843 | word16 sum; /* checksum */
|
---|
844 | word32 src; /* source address */
|
---|
845 | word32 dst; /* destination address */
|
---|
846 | } IpHdr;
|
---|
847 |
|
---|
848 |
|
---|
849 | /* IPv6 Header */
|
---|
850 | typedef struct Ip6Hdr {
|
---|
851 | byte ver_hl; /* version/traffic class high */
|
---|
852 | byte tc_fl; /* traffic class low/flow label high */
|
---|
853 | word16 fl; /* flow label low */
|
---|
854 | word16 length; /* payload length */
|
---|
855 | byte next_header; /* next header (6 for TCP, any other skip) */
|
---|
856 | byte hl; /* hop limit */
|
---|
857 | byte src[16]; /* source address */
|
---|
858 | byte dst[16]; /* destination address */
|
---|
859 | } Ip6Hdr;
|
---|
860 |
|
---|
861 |
|
---|
862 | /* IPv6 extension header */
|
---|
863 | typedef struct Ip6ExtHdr {
|
---|
864 | byte next_header; /* next header (6 for TCP, any other skip) */
|
---|
865 | byte length; /* length in 8-octet units - 1 */
|
---|
866 | byte reserved[6];
|
---|
867 | } Ip6ExtHdr;
|
---|
868 |
|
---|
869 |
|
---|
870 | #define IP_HL(ip) ( (((ip)->ver_hl) & 0x0f) * 4)
|
---|
871 | #define IP_V(ip) ( ((ip)->ver_hl) >> 4)
|
---|
872 |
|
---|
873 | /* TCP Header */
|
---|
874 | typedef struct TcpHdr {
|
---|
875 | word16 srcPort; /* source port */
|
---|
876 | word16 dstPort; /* destination port */
|
---|
877 | word32 sequence; /* sequence number */
|
---|
878 | word32 ack; /* acknowledgment number */
|
---|
879 | byte offset; /* data offset, reserved */
|
---|
880 | byte flags; /* option flags */
|
---|
881 | word16 window; /* window */
|
---|
882 | word16 sum; /* checksum */
|
---|
883 | word16 urgent; /* urgent pointer */
|
---|
884 | } TcpHdr;
|
---|
885 |
|
---|
886 | #define TCP_LEN(tcp) ( (((tcp)->offset & 0xf0) >> 4) * 4)
|
---|
887 | #define TCP_FIN 0x01
|
---|
888 | #define TCP_SYN 0x02
|
---|
889 | #define TCP_RST 0x04
|
---|
890 | #define TCP_ACK 0x10
|
---|
891 |
|
---|
892 |
|
---|
893 |
|
---|
894 |
|
---|
895 |
|
---|
896 | /* Use platform specific GetError to write to trace file if tracing */
|
---|
897 | static void Trace(int idx)
|
---|
898 | {
|
---|
899 | if (TraceOn) {
|
---|
900 | char myBuffer[MAX_ERROR_LEN];
|
---|
901 | GetError(idx, myBuffer);
|
---|
902 | fprintf(TraceFile, "\t%s\n", myBuffer);
|
---|
903 | #ifdef DEBUG_SNIFFER
|
---|
904 | fprintf(stderr, "\t%s\n", myBuffer);
|
---|
905 | #endif
|
---|
906 | }
|
---|
907 | }
|
---|
908 |
|
---|
909 |
|
---|
910 | /* Show TimeStamp for beginning of packet Trace */
|
---|
911 | static void TraceHeader(void)
|
---|
912 | {
|
---|
913 | if (TraceOn) {
|
---|
914 | time_t ticks = time(NULL);
|
---|
915 | fprintf(TraceFile, "\n%s", ctime(&ticks));
|
---|
916 | }
|
---|
917 | }
|
---|
918 |
|
---|
919 |
|
---|
920 | /* Show Set Server info for Trace */
|
---|
921 | static void TraceSetServer(const char* srv, int port, const char* keyFile)
|
---|
922 | {
|
---|
923 | if (TraceOn) {
|
---|
924 | fprintf(TraceFile, "\tTrying to install a new Sniffer Server with\n");
|
---|
925 | fprintf(TraceFile, "\tserver: %s, port: %d, keyFile: %s\n", srv, port,
|
---|
926 | keyFile);
|
---|
927 | }
|
---|
928 | }
|
---|
929 |
|
---|
930 |
|
---|
931 | #ifdef HAVE_SNI
|
---|
932 |
|
---|
933 | /* Show Set Named Server info for Trace */
|
---|
934 | static void TraceSetNamedServer(const char* name,
|
---|
935 | const char* srv, int port, const char* keyFile)
|
---|
936 | {
|
---|
937 | if (TraceOn) {
|
---|
938 | fprintf(TraceFile, "\tTrying to install a new Sniffer Server with\n");
|
---|
939 | fprintf(TraceFile, "\tname: %s, server: %s, port: %d, keyFile: %s\n",
|
---|
940 | name, srv, port, keyFile);
|
---|
941 | }
|
---|
942 | }
|
---|
943 |
|
---|
944 | #endif
|
---|
945 |
|
---|
946 |
|
---|
947 | /* Trace got packet number */
|
---|
948 | static void TracePacket(void)
|
---|
949 | {
|
---|
950 | if (TraceOn) {
|
---|
951 | static word32 packetNumber = 0;
|
---|
952 | fprintf(TraceFile, "\tGot a Packet to decode, packet %u\n",
|
---|
953 | ++packetNumber);
|
---|
954 | }
|
---|
955 | }
|
---|
956 |
|
---|
957 |
|
---|
958 | /* Convert network byte order address into human readable */
|
---|
959 | static const char* IpToS(int version, void* src, char* dst)
|
---|
960 | {
|
---|
961 | return inet_ntop(version, src, dst, TRACE_MSG_SZ);
|
---|
962 | }
|
---|
963 |
|
---|
964 |
|
---|
965 | /* Show destination and source address from Ip Hdr for packet Trace */
|
---|
966 | static void TraceIP(IpHdr* iphdr)
|
---|
967 | {
|
---|
968 | if (TraceOn) {
|
---|
969 | char src[TRACE_MSG_SZ];
|
---|
970 | char dst[TRACE_MSG_SZ];
|
---|
971 | fprintf(TraceFile, "\tdst:%s src:%s\n",
|
---|
972 | IpToS(AF_INET, &iphdr->dst, dst),
|
---|
973 | IpToS(AF_INET, &iphdr->src, src));
|
---|
974 | }
|
---|
975 | }
|
---|
976 |
|
---|
977 |
|
---|
978 | /* Show destination and source address from Ip6Hdr for packet Trace */
|
---|
979 | static void TraceIP6(Ip6Hdr* iphdr)
|
---|
980 | {
|
---|
981 | if (TraceOn) {
|
---|
982 | char src[TRACE_MSG_SZ];
|
---|
983 | char dst[TRACE_MSG_SZ];
|
---|
984 | fprintf(TraceFile, "\tdst: %s src: %s\n",
|
---|
985 | IpToS(AF_INET6, iphdr->dst, dst),
|
---|
986 | IpToS(AF_INET6, iphdr->src, src));
|
---|
987 | }
|
---|
988 | }
|
---|
989 |
|
---|
990 |
|
---|
991 | /* Show destination and source port from Tcp Hdr for packet Trace */
|
---|
992 | static void TraceTcp(TcpHdr* tcphdr)
|
---|
993 | {
|
---|
994 | if (TraceOn) {
|
---|
995 | fprintf(TraceFile, "\tdstPort:%u srcPort:%u\n", ntohs(tcphdr->dstPort),
|
---|
996 | ntohs(tcphdr->srcPort));
|
---|
997 | }
|
---|
998 | }
|
---|
999 |
|
---|
1000 |
|
---|
1001 | /* Show sequence and payload length for Trace */
|
---|
1002 | static void TraceSequence(word32 seq, int len)
|
---|
1003 | {
|
---|
1004 | if (TraceOn) {
|
---|
1005 | fprintf(TraceFile, "\tSequence:%u, payload length:%d\n", seq, len);
|
---|
1006 | }
|
---|
1007 | }
|
---|
1008 |
|
---|
1009 |
|
---|
1010 | /* Show sequence and payload length for Trace */
|
---|
1011 | static void TraceAck(word32 ack, word32 expected)
|
---|
1012 | {
|
---|
1013 | if (TraceOn) {
|
---|
1014 | fprintf(TraceFile, "\tAck:%u Expected:%u\n", ack, expected);
|
---|
1015 | }
|
---|
1016 | }
|
---|
1017 |
|
---|
1018 |
|
---|
1019 | /* Show relative expected and relative received sequences */
|
---|
1020 | static void TraceRelativeSequence(word32 expected, word32 got)
|
---|
1021 | {
|
---|
1022 | if (TraceOn) {
|
---|
1023 | fprintf(TraceFile, "\tExpected sequence:%u, received sequence:%u\n",
|
---|
1024 | expected, got);
|
---|
1025 | }
|
---|
1026 | }
|
---|
1027 |
|
---|
1028 |
|
---|
1029 | /* Show server sequence startup from SYN */
|
---|
1030 | static void TraceServerSyn(word32 seq)
|
---|
1031 | {
|
---|
1032 | if (TraceOn) {
|
---|
1033 | fprintf(TraceFile, "\tServer SYN, Sequence Start:%u\n", seq);
|
---|
1034 | }
|
---|
1035 | }
|
---|
1036 |
|
---|
1037 |
|
---|
1038 | /* Show client sequence startup from SYN */
|
---|
1039 | static void TraceClientSyn(word32 seq)
|
---|
1040 | {
|
---|
1041 | if (TraceOn) {
|
---|
1042 | fprintf(TraceFile, "\tClient SYN, Sequence Start:%u\n", seq);
|
---|
1043 | }
|
---|
1044 | }
|
---|
1045 |
|
---|
1046 |
|
---|
1047 | /* Show client FIN capture */
|
---|
1048 | static void TraceClientFin(word32 finSeq, word32 relSeq)
|
---|
1049 | {
|
---|
1050 | if (TraceOn) {
|
---|
1051 | fprintf(TraceFile, "\tClient FIN capture:%u, current SEQ:%u\n",
|
---|
1052 | finSeq, relSeq);
|
---|
1053 | }
|
---|
1054 | }
|
---|
1055 |
|
---|
1056 |
|
---|
1057 | /* Show server FIN capture */
|
---|
1058 | static void TraceServerFin(word32 finSeq, word32 relSeq)
|
---|
1059 | {
|
---|
1060 | if (TraceOn) {
|
---|
1061 | fprintf(TraceFile, "\tServer FIN capture:%u, current SEQ:%u\n",
|
---|
1062 | finSeq, relSeq);
|
---|
1063 | }
|
---|
1064 | }
|
---|
1065 |
|
---|
1066 |
|
---|
1067 | /* Show number of SSL data bytes decoded, could be 0 (ok) */
|
---|
1068 | static void TraceGotData(int bytes)
|
---|
1069 | {
|
---|
1070 | if (TraceOn) {
|
---|
1071 | fprintf(TraceFile, "\t%d bytes of SSL App data processed\n", bytes);
|
---|
1072 | }
|
---|
1073 | }
|
---|
1074 |
|
---|
1075 |
|
---|
1076 | /* Show bytes added to old SSL App data */
|
---|
1077 | static void TraceAddedData(int newBytes, int existingBytes)
|
---|
1078 | {
|
---|
1079 | if (TraceOn) {
|
---|
1080 | fprintf(TraceFile,
|
---|
1081 | "\t%d bytes added to %d existing bytes in User Buffer\n",
|
---|
1082 | newBytes, existingBytes);
|
---|
1083 | }
|
---|
1084 | }
|
---|
1085 |
|
---|
1086 |
|
---|
1087 | /* Show Stale Session */
|
---|
1088 | static void TraceStaleSession(void)
|
---|
1089 | {
|
---|
1090 | if (TraceOn) {
|
---|
1091 | fprintf(TraceFile, "\tFound a stale session\n");
|
---|
1092 | }
|
---|
1093 | }
|
---|
1094 |
|
---|
1095 |
|
---|
1096 | /* Show Finding Stale Sessions */
|
---|
1097 | static void TraceFindingStale(void)
|
---|
1098 | {
|
---|
1099 | if (TraceOn) {
|
---|
1100 | fprintf(TraceFile, "\tTrying to find Stale Sessions\n");
|
---|
1101 | }
|
---|
1102 | }
|
---|
1103 |
|
---|
1104 |
|
---|
1105 | /* Show Removed Session */
|
---|
1106 | static void TraceRemovedSession(void)
|
---|
1107 | {
|
---|
1108 | if (TraceOn) {
|
---|
1109 | fprintf(TraceFile, "\tRemoved it\n");
|
---|
1110 | }
|
---|
1111 | }
|
---|
1112 |
|
---|
1113 |
|
---|
1114 | /* Show SSLInfo if provided and is valid. */
|
---|
1115 | static void TraceSessionInfo(SSLInfo* sslInfo)
|
---|
1116 | {
|
---|
1117 | if (TraceOn) {
|
---|
1118 | if (sslInfo != NULL && sslInfo->isValid) {
|
---|
1119 | fprintf(TraceFile,
|
---|
1120 | "\tver:(%u %u) suiteId:(%02x %02x) suiteName:(%s) "
|
---|
1121 | #ifdef HAVE_SNI
|
---|
1122 | "sni:(%s) "
|
---|
1123 | #endif
|
---|
1124 | "keySize:(%u)\n",
|
---|
1125 | sslInfo->protocolVersionMajor,
|
---|
1126 | sslInfo->protocolVersionMinor,
|
---|
1127 | sslInfo->serverCipherSuite0,
|
---|
1128 | sslInfo->serverCipherSuite,
|
---|
1129 | sslInfo->serverCipherSuiteName,
|
---|
1130 | #ifdef HAVE_SNI
|
---|
1131 | sslInfo->serverNameIndication,
|
---|
1132 | #endif
|
---|
1133 | sslInfo->keySize);
|
---|
1134 | }
|
---|
1135 | }
|
---|
1136 | }
|
---|
1137 |
|
---|
1138 |
|
---|
1139 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
1140 |
|
---|
1141 | /* Show value added to a named statistic. */
|
---|
1142 | static void TraceStat(const char* name, int add)
|
---|
1143 | {
|
---|
1144 | if (TraceOn) {
|
---|
1145 | fprintf(TraceFile, "\tAdding %d to %s\n", add, name);
|
---|
1146 | }
|
---|
1147 | }
|
---|
1148 |
|
---|
1149 | #endif
|
---|
1150 |
|
---|
1151 |
|
---|
1152 | /* Set user error string */
|
---|
1153 | static void SetError(int idx, char* error, SnifferSession* session, int fatal)
|
---|
1154 | {
|
---|
1155 | GetError(idx, error);
|
---|
1156 | Trace(idx);
|
---|
1157 | if (session && fatal == FATAL_ERROR_STATE)
|
---|
1158 | session->flags.fatalError = 1;
|
---|
1159 | }
|
---|
1160 |
|
---|
1161 |
|
---|
1162 | /* Compare IpAddrInfo structs */
|
---|
1163 | static WC_INLINE int MatchAddr(IpAddrInfo l, IpAddrInfo r)
|
---|
1164 | {
|
---|
1165 | if (l.version == r.version) {
|
---|
1166 | if (l.version == IPV4)
|
---|
1167 | return (l.ip4 == r.ip4);
|
---|
1168 | else if (l.version == IPV6)
|
---|
1169 | return (0 == XMEMCMP(l.ip6, r.ip6, sizeof(l.ip6)));
|
---|
1170 | }
|
---|
1171 | return 0;
|
---|
1172 | }
|
---|
1173 |
|
---|
1174 |
|
---|
1175 | #ifndef WOLFSSL_SNIFFER_WATCH
|
---|
1176 |
|
---|
1177 | /* See if this IPV4 network order address has been registered */
|
---|
1178 | /* return 1 is true, 0 is false */
|
---|
1179 | static int IsServerRegistered(word32 addr)
|
---|
1180 | {
|
---|
1181 | int ret = 0; /* false */
|
---|
1182 | SnifferServer* sniffer;
|
---|
1183 |
|
---|
1184 | wc_LockMutex(&ServerListMutex);
|
---|
1185 |
|
---|
1186 | sniffer = ServerList;
|
---|
1187 | while (sniffer) {
|
---|
1188 | if (sniffer->server.ip4 == addr) {
|
---|
1189 | ret = 1;
|
---|
1190 | break;
|
---|
1191 | }
|
---|
1192 | sniffer = sniffer->next;
|
---|
1193 | }
|
---|
1194 |
|
---|
1195 | wc_UnLockMutex(&ServerListMutex);
|
---|
1196 |
|
---|
1197 | return ret;
|
---|
1198 | }
|
---|
1199 |
|
---|
1200 |
|
---|
1201 | /* See if this port has been registered to watch */
|
---|
1202 | /* See if this IPV4 network order address has been registered */
|
---|
1203 | /* return 1 is true, 0 is false */
|
---|
1204 | static int IsServerRegistered6(byte* addr)
|
---|
1205 | {
|
---|
1206 | int ret = 0; /* false */
|
---|
1207 | SnifferServer* sniffer;
|
---|
1208 |
|
---|
1209 | wc_LockMutex(&ServerListMutex);
|
---|
1210 |
|
---|
1211 | sniffer = ServerList;
|
---|
1212 | while (sniffer) {
|
---|
1213 | if (sniffer->server.version == IPV6 &&
|
---|
1214 | 0 == XMEMCMP(sniffer->server.ip6, addr, sizeof(sniffer->server.ip6))) {
|
---|
1215 | ret = 1;
|
---|
1216 | break;
|
---|
1217 | }
|
---|
1218 | sniffer = sniffer->next;
|
---|
1219 | }
|
---|
1220 |
|
---|
1221 | wc_UnLockMutex(&ServerListMutex);
|
---|
1222 |
|
---|
1223 | return ret;
|
---|
1224 | }
|
---|
1225 |
|
---|
1226 |
|
---|
1227 | /* See if this port has been registered to watch */
|
---|
1228 | /* return 1 is true, 0 is false */
|
---|
1229 | static int IsPortRegistered(word32 port)
|
---|
1230 | {
|
---|
1231 | int ret = 0; /* false */
|
---|
1232 | SnifferServer* sniffer;
|
---|
1233 |
|
---|
1234 | wc_LockMutex(&ServerListMutex);
|
---|
1235 |
|
---|
1236 | sniffer = ServerList;
|
---|
1237 | while (sniffer) {
|
---|
1238 | if (sniffer->port == (int)port) {
|
---|
1239 | ret = 1;
|
---|
1240 | break;
|
---|
1241 | }
|
---|
1242 | sniffer = sniffer->next;
|
---|
1243 | }
|
---|
1244 |
|
---|
1245 | wc_UnLockMutex(&ServerListMutex);
|
---|
1246 |
|
---|
1247 | return ret;
|
---|
1248 | }
|
---|
1249 |
|
---|
1250 | #endif
|
---|
1251 |
|
---|
1252 |
|
---|
1253 | /* Get SnifferServer from IP and Port */
|
---|
1254 | static SnifferServer* GetSnifferServer(IpInfo* ipInfo, TcpInfo* tcpInfo)
|
---|
1255 | {
|
---|
1256 | SnifferServer* sniffer;
|
---|
1257 |
|
---|
1258 | wc_LockMutex(&ServerListMutex);
|
---|
1259 |
|
---|
1260 | sniffer = ServerList;
|
---|
1261 |
|
---|
1262 | #ifndef WOLFSSL_SNIFFER_WATCH
|
---|
1263 | while (sniffer) {
|
---|
1264 | if (sniffer->port == tcpInfo->srcPort &&
|
---|
1265 | MatchAddr(sniffer->server, ipInfo->src))
|
---|
1266 | break;
|
---|
1267 | if (sniffer->port == tcpInfo->dstPort &&
|
---|
1268 | MatchAddr(sniffer->server, ipInfo->dst))
|
---|
1269 | break;
|
---|
1270 |
|
---|
1271 | sniffer = sniffer->next;
|
---|
1272 | }
|
---|
1273 | #else
|
---|
1274 | (void)ipInfo;
|
---|
1275 | (void)tcpInfo;
|
---|
1276 | #endif
|
---|
1277 |
|
---|
1278 | wc_UnLockMutex(&ServerListMutex);
|
---|
1279 |
|
---|
1280 | return sniffer;
|
---|
1281 | }
|
---|
1282 |
|
---|
1283 |
|
---|
1284 | /* Hash the Session Info, return hash row */
|
---|
1285 | static word32 SessionHash(IpInfo* ipInfo, TcpInfo* tcpInfo)
|
---|
1286 | {
|
---|
1287 | word32 hash = 1;
|
---|
1288 |
|
---|
1289 | if (ipInfo->src.version == IPV4) {
|
---|
1290 | hash *= ipInfo->src.ip4 * ipInfo->dst.ip4;
|
---|
1291 | }
|
---|
1292 | else if (ipInfo->src.version == IPV6) {
|
---|
1293 | word32* x;
|
---|
1294 | word32 y;
|
---|
1295 | x = (word32*)ipInfo->src.ip6;
|
---|
1296 | y = x[0] ^ x[1] ^ x[2] ^ x[3];
|
---|
1297 | hash *= y;
|
---|
1298 | x = (word32*)ipInfo->dst.ip6;
|
---|
1299 | y = x[0] ^ x[1] ^ x[2] ^ x[3];
|
---|
1300 | hash *= y;
|
---|
1301 | }
|
---|
1302 | hash *= tcpInfo->srcPort * tcpInfo->dstPort;
|
---|
1303 |
|
---|
1304 | return hash % HASH_SIZE;
|
---|
1305 | }
|
---|
1306 |
|
---|
1307 |
|
---|
1308 | /* Get Existing SnifferSession from IP and Port */
|
---|
1309 | static SnifferSession* GetSnifferSession(IpInfo* ipInfo, TcpInfo* tcpInfo)
|
---|
1310 | {
|
---|
1311 | SnifferSession* session;
|
---|
1312 | time_t currTime = time(NULL);
|
---|
1313 | word32 row = SessionHash(ipInfo, tcpInfo);
|
---|
1314 |
|
---|
1315 | assert(row <= HASH_SIZE);
|
---|
1316 |
|
---|
1317 | wc_LockMutex(&SessionMutex);
|
---|
1318 |
|
---|
1319 | session = SessionTable[row];
|
---|
1320 | while (session) {
|
---|
1321 | if (MatchAddr(session->server, ipInfo->src) &&
|
---|
1322 | MatchAddr(session->client, ipInfo->dst) &&
|
---|
1323 | session->srvPort == tcpInfo->srcPort &&
|
---|
1324 | session->cliPort == tcpInfo->dstPort)
|
---|
1325 | break;
|
---|
1326 |
|
---|
1327 | if (MatchAddr(session->client, ipInfo->src) &&
|
---|
1328 | MatchAddr(session->server, ipInfo->dst) &&
|
---|
1329 | session->cliPort == tcpInfo->srcPort &&
|
---|
1330 | session->srvPort == tcpInfo->dstPort)
|
---|
1331 | break;
|
---|
1332 |
|
---|
1333 | session = session->next;
|
---|
1334 | }
|
---|
1335 |
|
---|
1336 | if (session)
|
---|
1337 | session->lastUsed= currTime; /* keep session alive, remove stale will */
|
---|
1338 | /* leave alone */
|
---|
1339 | wc_UnLockMutex(&SessionMutex);
|
---|
1340 |
|
---|
1341 | /* determine side */
|
---|
1342 | if (session) {
|
---|
1343 | if (MatchAddr(ipInfo->dst, session->server) &&
|
---|
1344 | tcpInfo->dstPort == session->srvPort) {
|
---|
1345 |
|
---|
1346 | session->flags.side = WOLFSSL_SERVER_END;
|
---|
1347 | }
|
---|
1348 | else {
|
---|
1349 | session->flags.side = WOLFSSL_CLIENT_END;
|
---|
1350 | }
|
---|
1351 | }
|
---|
1352 |
|
---|
1353 | return session;
|
---|
1354 | }
|
---|
1355 |
|
---|
1356 |
|
---|
1357 | #if defined(HAVE_SNI) || defined(WOLFSSL_SNIFFER_WATCH)
|
---|
1358 |
|
---|
1359 | static int LoadKeyFile(byte** keyBuf, word32* keyBufSz,
|
---|
1360 | const char* keyFile, int typeKey,
|
---|
1361 | const char* password)
|
---|
1362 | {
|
---|
1363 | byte* loadBuf;
|
---|
1364 | long fileSz = 0;
|
---|
1365 | XFILE file;
|
---|
1366 | int ret;
|
---|
1367 |
|
---|
1368 | if (keyBuf == NULL || keyBufSz == NULL || keyFile == NULL) {
|
---|
1369 | return -1;
|
---|
1370 | }
|
---|
1371 |
|
---|
1372 | file = XFOPEN(keyFile, "rb");
|
---|
1373 | if (file == XBADFILE) return -1;
|
---|
1374 | if(XFSEEK(file, 0, XSEEK_END) != 0) {
|
---|
1375 | XFCLOSE(file);
|
---|
1376 | return -1;
|
---|
1377 | }
|
---|
1378 | fileSz = XFTELL(file);
|
---|
1379 | if (fileSz > MAX_WOLFSSL_FILE_SIZE || fileSz < 0) {
|
---|
1380 | XFCLOSE(file);
|
---|
1381 | return -1;
|
---|
1382 | }
|
---|
1383 | XREWIND(file);
|
---|
1384 |
|
---|
1385 | loadBuf = (byte*)XMALLOC(fileSz, NULL, DYNAMIC_TYPE_FILE);
|
---|
1386 | if (loadBuf == NULL) {
|
---|
1387 | XFCLOSE(file);
|
---|
1388 | return -1;
|
---|
1389 | }
|
---|
1390 |
|
---|
1391 | ret = (int)XFREAD(loadBuf, 1, fileSz, file);
|
---|
1392 | XFCLOSE(file);
|
---|
1393 |
|
---|
1394 | if (ret != fileSz) {
|
---|
1395 | XFREE(loadBuf, NULL, DYNAMIC_TYPE_FILE);
|
---|
1396 | return -1;
|
---|
1397 | }
|
---|
1398 |
|
---|
1399 | if (typeKey == WOLFSSL_FILETYPE_PEM) {
|
---|
1400 | byte* saveBuf = (byte*)XMALLOC(fileSz, NULL, DYNAMIC_TYPE_X509);
|
---|
1401 | int saveBufSz = 0;
|
---|
1402 |
|
---|
1403 | ret = -1;
|
---|
1404 | if (saveBuf != NULL) {
|
---|
1405 | saveBufSz = wc_KeyPemToDer(loadBuf, (int)fileSz,
|
---|
1406 | saveBuf, (int)fileSz, password);
|
---|
1407 | if (saveBufSz < 0) {
|
---|
1408 | saveBufSz = 0;
|
---|
1409 | XFREE(saveBuf, NULL, DYNAMIC_TYPE_X509);
|
---|
1410 | saveBuf = NULL;
|
---|
1411 | }
|
---|
1412 | else
|
---|
1413 | ret = 0;
|
---|
1414 | }
|
---|
1415 |
|
---|
1416 | ForceZero(loadBuf, (word32)fileSz);
|
---|
1417 | XFREE(loadBuf, NULL, DYNAMIC_TYPE_FILE);
|
---|
1418 |
|
---|
1419 | if (saveBuf) {
|
---|
1420 | *keyBuf = saveBuf;
|
---|
1421 | *keyBufSz = (word32)saveBufSz;
|
---|
1422 | }
|
---|
1423 | }
|
---|
1424 | else {
|
---|
1425 | *keyBuf = loadBuf;
|
---|
1426 | *keyBufSz = (word32)fileSz;
|
---|
1427 | }
|
---|
1428 |
|
---|
1429 | if (ret < 0) {
|
---|
1430 | return -1;
|
---|
1431 | }
|
---|
1432 |
|
---|
1433 | return ret;
|
---|
1434 | }
|
---|
1435 |
|
---|
1436 | #endif
|
---|
1437 |
|
---|
1438 |
|
---|
1439 | #ifdef WOLFSSL_SNIFFER_WATCH
|
---|
1440 |
|
---|
1441 | static int CreateWatchSnifferServer(char* error)
|
---|
1442 | {
|
---|
1443 | SnifferServer* sniffer;
|
---|
1444 |
|
---|
1445 | sniffer = (SnifferServer*)XMALLOC(sizeof(SnifferServer), NULL,
|
---|
1446 | DYNAMIC_TYPE_SNIFFER_SERVER);
|
---|
1447 | if (sniffer == NULL) {
|
---|
1448 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
1449 | return -1;
|
---|
1450 | }
|
---|
1451 | InitSnifferServer(sniffer);
|
---|
1452 | sniffer->ctx = SSL_CTX_new(TLSv1_2_client_method());
|
---|
1453 | if (!sniffer->ctx) {
|
---|
1454 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
1455 | FreeSnifferServer(sniffer);
|
---|
1456 | return -1;
|
---|
1457 | }
|
---|
1458 | #ifdef WOLF_CRYPTO_CB
|
---|
1459 | if (CryptoDeviceId != INVALID_DEVID)
|
---|
1460 | wolfSSL_CTX_SetDevId(sniffer->ctx, CryptoDeviceId);
|
---|
1461 | #endif
|
---|
1462 | ServerList = sniffer;
|
---|
1463 |
|
---|
1464 | return 0;
|
---|
1465 | }
|
---|
1466 |
|
---|
1467 | #endif
|
---|
1468 |
|
---|
1469 |
|
---|
1470 | static int SetNamedPrivateKey(const char* name, const char* address, int port,
|
---|
1471 | const char* keyFile, int typeKey, const char* password, char* error)
|
---|
1472 | {
|
---|
1473 | SnifferServer* sniffer;
|
---|
1474 | int ret;
|
---|
1475 | int type = (typeKey == FILETYPE_PEM) ? WOLFSSL_FILETYPE_PEM :
|
---|
1476 | WOLFSSL_FILETYPE_ASN1;
|
---|
1477 | int isNew = 0;
|
---|
1478 | IpAddrInfo serverIp;
|
---|
1479 |
|
---|
1480 | #ifdef HAVE_SNI
|
---|
1481 | NamedKey* namedKey = NULL;
|
---|
1482 | #endif
|
---|
1483 |
|
---|
1484 | (void)name;
|
---|
1485 | #ifdef HAVE_SNI
|
---|
1486 | if (name != NULL) {
|
---|
1487 | namedKey = (NamedKey*)XMALLOC(sizeof(NamedKey),
|
---|
1488 | NULL, DYNAMIC_TYPE_SNIFFER_NAMED_KEY);
|
---|
1489 | if (namedKey == NULL) {
|
---|
1490 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
1491 | return -1;
|
---|
1492 | }
|
---|
1493 | XMEMSET(namedKey, 0, sizeof(NamedKey));
|
---|
1494 |
|
---|
1495 | namedKey->nameSz = (word32)XSTRLEN(name);
|
---|
1496 | if (namedKey->nameSz > sizeof(namedKey->name)-1)
|
---|
1497 | namedKey->nameSz = sizeof(namedKey->name)-1;
|
---|
1498 | XSTRNCPY(namedKey->name, name, namedKey->nameSz);
|
---|
1499 | namedKey->name[MAX_SERVER_NAME-1] = '\0';
|
---|
1500 |
|
---|
1501 | ret = LoadKeyFile(&namedKey->key, &namedKey->keySz,
|
---|
1502 | keyFile, type, password);
|
---|
1503 | if (ret < 0) {
|
---|
1504 | SetError(KEY_FILE_STR, error, NULL, 0);
|
---|
1505 | FreeNamedKey(namedKey);
|
---|
1506 | return -1;
|
---|
1507 | }
|
---|
1508 | }
|
---|
1509 | #endif
|
---|
1510 |
|
---|
1511 | serverIp.version = IPV4;
|
---|
1512 | serverIp.ip4 = inet_addr(address);
|
---|
1513 | if (serverIp.ip4 == INADDR_NONE) {
|
---|
1514 | if (inet_pton(AF_INET6, address, serverIp.ip6) == 1) {
|
---|
1515 | serverIp.version = IPV6;
|
---|
1516 | }
|
---|
1517 | }
|
---|
1518 | sniffer = ServerList;
|
---|
1519 | while (sniffer != NULL &&
|
---|
1520 | (!MatchAddr(sniffer->server, serverIp) || sniffer->port != port)) {
|
---|
1521 | sniffer = sniffer->next;
|
---|
1522 | }
|
---|
1523 |
|
---|
1524 | if (sniffer == NULL) {
|
---|
1525 | isNew = 1;
|
---|
1526 | sniffer = (SnifferServer*)XMALLOC(sizeof(SnifferServer),
|
---|
1527 | NULL, DYNAMIC_TYPE_SNIFFER_SERVER);
|
---|
1528 | if (sniffer == NULL) {
|
---|
1529 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
1530 | #ifdef HAVE_SNI
|
---|
1531 | FreeNamedKey(namedKey);
|
---|
1532 | #endif
|
---|
1533 | return -1;
|
---|
1534 | }
|
---|
1535 | InitSnifferServer(sniffer);
|
---|
1536 |
|
---|
1537 | XSTRNCPY(sniffer->address, address, MAX_SERVER_ADDRESS-1);
|
---|
1538 | sniffer->address[MAX_SERVER_ADDRESS-1] = '\0';
|
---|
1539 | sniffer->server = serverIp;
|
---|
1540 | sniffer->port = port;
|
---|
1541 |
|
---|
1542 | sniffer->ctx = SSL_CTX_new(TLSv1_2_client_method());
|
---|
1543 | if (!sniffer->ctx) {
|
---|
1544 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
1545 | #ifdef HAVE_SNI
|
---|
1546 | FreeNamedKey(namedKey);
|
---|
1547 | #endif
|
---|
1548 | FreeSnifferServer(sniffer);
|
---|
1549 | return -1;
|
---|
1550 | }
|
---|
1551 | }
|
---|
1552 |
|
---|
1553 | if (name == NULL) {
|
---|
1554 | if (password) {
|
---|
1555 | #ifdef WOLFSSL_ENCRYPTED_KEYS
|
---|
1556 | SSL_CTX_set_default_passwd_cb(sniffer->ctx, SetPassword);
|
---|
1557 | SSL_CTX_set_default_passwd_cb_userdata(
|
---|
1558 | sniffer->ctx, (void*)password);
|
---|
1559 | #endif
|
---|
1560 | }
|
---|
1561 | ret = SSL_CTX_use_PrivateKey_file(sniffer->ctx, keyFile, type);
|
---|
1562 | if (ret != WOLFSSL_SUCCESS) {
|
---|
1563 | SetError(KEY_FILE_STR, error, NULL, 0);
|
---|
1564 | if (isNew)
|
---|
1565 | FreeSnifferServer(sniffer);
|
---|
1566 | return -1;
|
---|
1567 | }
|
---|
1568 | #ifdef WOLF_CRYPTO_CB
|
---|
1569 | wolfSSL_CTX_SetDevId(sniffer->ctx, CryptoDeviceId);
|
---|
1570 | #endif
|
---|
1571 | }
|
---|
1572 | #ifdef HAVE_SNI
|
---|
1573 | else {
|
---|
1574 | wc_LockMutex(&sniffer->namedKeysMutex);
|
---|
1575 | namedKey->next = sniffer->namedKeys;
|
---|
1576 | sniffer->namedKeys = namedKey;
|
---|
1577 | wc_UnLockMutex(&sniffer->namedKeysMutex);
|
---|
1578 | }
|
---|
1579 | #endif
|
---|
1580 |
|
---|
1581 | if (isNew) {
|
---|
1582 | sniffer->next = ServerList;
|
---|
1583 | ServerList = sniffer;
|
---|
1584 | }
|
---|
1585 |
|
---|
1586 | return 0;
|
---|
1587 | }
|
---|
1588 |
|
---|
1589 |
|
---|
1590 | #ifdef HAVE_SNI
|
---|
1591 |
|
---|
1592 | /* Sets the private key for a specific name, server and port */
|
---|
1593 | /* returns 0 on success, -1 on error */
|
---|
1594 | int ssl_SetNamedPrivateKey(const char* name,
|
---|
1595 | const char* address, int port,
|
---|
1596 | const char* keyFile, int typeKey,
|
---|
1597 | const char* password, char* error)
|
---|
1598 | {
|
---|
1599 | int ret;
|
---|
1600 |
|
---|
1601 | TraceHeader();
|
---|
1602 | TraceSetNamedServer(name, address, port, keyFile);
|
---|
1603 |
|
---|
1604 | wc_LockMutex(&ServerListMutex);
|
---|
1605 | ret = SetNamedPrivateKey(name, address, port, keyFile,
|
---|
1606 | typeKey, password, error);
|
---|
1607 | wc_UnLockMutex(&ServerListMutex);
|
---|
1608 |
|
---|
1609 | if (ret == 0)
|
---|
1610 | Trace(NEW_SERVER_STR);
|
---|
1611 |
|
---|
1612 | return ret;
|
---|
1613 | }
|
---|
1614 |
|
---|
1615 | #endif
|
---|
1616 |
|
---|
1617 |
|
---|
1618 | /* Sets the private key for a specific server and port */
|
---|
1619 | /* returns 0 on success, -1 on error */
|
---|
1620 | int ssl_SetPrivateKey(const char* address, int port, const char* keyFile,
|
---|
1621 | int typeKey, const char* password, char* error)
|
---|
1622 | {
|
---|
1623 | int ret;
|
---|
1624 |
|
---|
1625 | TraceHeader();
|
---|
1626 | TraceSetServer(address, port, keyFile);
|
---|
1627 |
|
---|
1628 | wc_LockMutex(&ServerListMutex);
|
---|
1629 | ret = SetNamedPrivateKey(NULL, address, port, keyFile,
|
---|
1630 | typeKey, password, error);
|
---|
1631 | wc_UnLockMutex(&ServerListMutex);
|
---|
1632 |
|
---|
1633 | if (ret == 0)
|
---|
1634 | Trace(NEW_SERVER_STR);
|
---|
1635 |
|
---|
1636 | return ret;
|
---|
1637 | }
|
---|
1638 |
|
---|
1639 |
|
---|
1640 | /* Check IP Header for IPV6, TCP, and a registered server address */
|
---|
1641 | /* returns 0 on success, -1 on error */
|
---|
1642 | static int CheckIp6Hdr(Ip6Hdr* iphdr, IpInfo* info, int length, char* error)
|
---|
1643 | {
|
---|
1644 | int version = IP_V(iphdr);
|
---|
1645 | int exthdrsz = IP6_HDR_SZ;
|
---|
1646 |
|
---|
1647 | TraceIP6(iphdr);
|
---|
1648 | Trace(IP_CHECK_STR);
|
---|
1649 |
|
---|
1650 | if (version != IPV6) {
|
---|
1651 | SetError(BAD_IPVER_STR, error, NULL, 0);
|
---|
1652 | return -1;
|
---|
1653 | }
|
---|
1654 |
|
---|
1655 | /* Here, we need to move onto next header if not TCP. */
|
---|
1656 | if (iphdr->next_header != TCP_PROTOCOL) {
|
---|
1657 | Ip6ExtHdr* exthdr = (Ip6ExtHdr*)((byte*)iphdr + IP6_HDR_SZ);
|
---|
1658 | do {
|
---|
1659 | int hdrsz = (exthdr->length + 1) * 8;
|
---|
1660 | if (hdrsz > length - exthdrsz) {
|
---|
1661 | SetError(PACKET_HDR_SHORT_STR, error, NULL, 0);
|
---|
1662 | return -1;
|
---|
1663 | }
|
---|
1664 | exthdrsz += hdrsz;
|
---|
1665 | exthdr = (Ip6ExtHdr*)((byte*)exthdr + hdrsz);
|
---|
1666 | }
|
---|
1667 | while (exthdr->next_header != TCP_PROTOCOL &&
|
---|
1668 | exthdr->next_header != NO_NEXT_HEADER);
|
---|
1669 | }
|
---|
1670 |
|
---|
1671 | #ifndef WOLFSSL_SNIFFER_WATCH
|
---|
1672 | if (!IsServerRegistered6(iphdr->src) && !IsServerRegistered6(iphdr->dst)) {
|
---|
1673 | SetError(SERVER_NOT_REG_STR, error, NULL, 0);
|
---|
1674 | return -1;
|
---|
1675 | }
|
---|
1676 | #endif
|
---|
1677 |
|
---|
1678 | info->length = exthdrsz;
|
---|
1679 | info->total = ntohs(iphdr->length) + info->length;
|
---|
1680 | /* IPv6 doesn't include its own header size in the length like v4. */
|
---|
1681 | info->src.version = IPV6;
|
---|
1682 | XMEMCPY(info->src.ip6, iphdr->src, sizeof(info->src.ip6));
|
---|
1683 | info->dst.version = IPV6;
|
---|
1684 | XMEMCPY(info->dst.ip6, iphdr->dst, sizeof(info->dst.ip6));
|
---|
1685 |
|
---|
1686 | return 0;
|
---|
1687 | }
|
---|
1688 |
|
---|
1689 |
|
---|
1690 | /* Check IP Header for IPV4, TCP, and a registered server address */
|
---|
1691 | /* If header IPv6, pass to CheckIp6Hdr(). */
|
---|
1692 | /* returns 0 on success, -1 on error */
|
---|
1693 | static int CheckIpHdr(IpHdr* iphdr, IpInfo* info, int length, char* error)
|
---|
1694 | {
|
---|
1695 | int version = IP_V(iphdr);
|
---|
1696 |
|
---|
1697 | if (version == IPV6)
|
---|
1698 | return CheckIp6Hdr((Ip6Hdr*)iphdr, info, length, error);
|
---|
1699 |
|
---|
1700 | TraceIP(iphdr);
|
---|
1701 | Trace(IP_CHECK_STR);
|
---|
1702 |
|
---|
1703 | if (version != IPV4) {
|
---|
1704 | SetError(BAD_IPVER_STR, error, NULL, 0);
|
---|
1705 | return -1;
|
---|
1706 | }
|
---|
1707 |
|
---|
1708 | if (iphdr->protocol != TCP_PROTOCOL) {
|
---|
1709 | SetError(BAD_PROTO_STR, error, NULL, 0);
|
---|
1710 | return -1;
|
---|
1711 | }
|
---|
1712 |
|
---|
1713 | #ifndef WOLFSSL_SNIFFER_WATCH
|
---|
1714 | if (!IsServerRegistered(iphdr->src) && !IsServerRegistered(iphdr->dst)) {
|
---|
1715 | SetError(SERVER_NOT_REG_STR, error, NULL, 0);
|
---|
1716 | return -1;
|
---|
1717 | }
|
---|
1718 | #endif
|
---|
1719 |
|
---|
1720 | info->length = IP_HL(iphdr);
|
---|
1721 | info->total = ntohs(iphdr->length);
|
---|
1722 | info->src.version = IPV4;
|
---|
1723 | info->src.ip4 = iphdr->src;
|
---|
1724 | info->dst.version = IPV4;
|
---|
1725 | info->dst.ip4 = iphdr->dst;
|
---|
1726 |
|
---|
1727 | if (info->total == 0)
|
---|
1728 | info->total = length; /* reassembled may be off */
|
---|
1729 |
|
---|
1730 | return 0;
|
---|
1731 | }
|
---|
1732 |
|
---|
1733 |
|
---|
1734 | /* Check TCP Header for a registered port */
|
---|
1735 | /* returns 0 on success, -1 on error */
|
---|
1736 | static int CheckTcpHdr(TcpHdr* tcphdr, TcpInfo* info, char* error)
|
---|
1737 | {
|
---|
1738 | TraceTcp(tcphdr);
|
---|
1739 | Trace(TCP_CHECK_STR);
|
---|
1740 | info->srcPort = ntohs(tcphdr->srcPort);
|
---|
1741 | info->dstPort = ntohs(tcphdr->dstPort);
|
---|
1742 | info->length = TCP_LEN(tcphdr);
|
---|
1743 | info->sequence = ntohl(tcphdr->sequence);
|
---|
1744 | info->fin = tcphdr->flags & TCP_FIN;
|
---|
1745 | info->rst = tcphdr->flags & TCP_RST;
|
---|
1746 | info->syn = tcphdr->flags & TCP_SYN;
|
---|
1747 | info->ack = tcphdr->flags & TCP_ACK;
|
---|
1748 | if (info->ack)
|
---|
1749 | info->ackNumber = ntohl(tcphdr->ack);
|
---|
1750 |
|
---|
1751 | #ifndef WOLFSSL_SNIFFER_WATCH
|
---|
1752 | if (!IsPortRegistered(info->srcPort) && !IsPortRegistered(info->dstPort)) {
|
---|
1753 | SetError(SERVER_PORT_NOT_REG_STR, error, NULL, 0);
|
---|
1754 | return -1;
|
---|
1755 | }
|
---|
1756 | #else
|
---|
1757 | (void)error;
|
---|
1758 | #endif
|
---|
1759 |
|
---|
1760 | return 0;
|
---|
1761 | }
|
---|
1762 |
|
---|
1763 |
|
---|
1764 | /* Decode Record Layer Header */
|
---|
1765 | static int GetRecordHeader(const byte* input, RecordLayerHeader* rh, int* size)
|
---|
1766 | {
|
---|
1767 | XMEMCPY(rh, input, RECORD_HEADER_SZ);
|
---|
1768 | *size = (rh->length[0] << 8) | rh->length[1];
|
---|
1769 |
|
---|
1770 | if (*size > (MAX_RECORD_SIZE + COMP_EXTRA + MAX_MSG_EXTRA))
|
---|
1771 | return LENGTH_ERROR;
|
---|
1772 |
|
---|
1773 | return 0;
|
---|
1774 | }
|
---|
1775 |
|
---|
1776 |
|
---|
1777 | /* Copies the session's information to the provided sslInfo. Skip copy if
|
---|
1778 | * SSLInfo is not provided. */
|
---|
1779 | static void CopySessionInfo(SnifferSession* session, SSLInfo* sslInfo)
|
---|
1780 | {
|
---|
1781 | if (NULL != sslInfo) {
|
---|
1782 | XMEMSET(sslInfo, 0, sizeof(SSLInfo));
|
---|
1783 |
|
---|
1784 | /* Pass back Session Info after we have processed the Server Hello. */
|
---|
1785 | if (0 != session->sslServer->options.cipherSuite) {
|
---|
1786 | const char* pCipher;
|
---|
1787 |
|
---|
1788 | sslInfo->isValid = 1;
|
---|
1789 | sslInfo->protocolVersionMajor = session->sslServer->version.major;
|
---|
1790 | sslInfo->protocolVersionMinor = session->sslServer->version.minor;
|
---|
1791 | sslInfo->serverCipherSuite0 =
|
---|
1792 | session->sslServer->options.cipherSuite0;
|
---|
1793 | sslInfo->serverCipherSuite =
|
---|
1794 | session->sslServer->options.cipherSuite;
|
---|
1795 |
|
---|
1796 | pCipher = wolfSSL_get_cipher(session->sslServer);
|
---|
1797 | if (NULL != pCipher) {
|
---|
1798 | XSTRNCPY((char*)sslInfo->serverCipherSuiteName, pCipher,
|
---|
1799 | sizeof(sslInfo->serverCipherSuiteName));
|
---|
1800 | sslInfo->serverCipherSuiteName
|
---|
1801 | [sizeof(sslInfo->serverCipherSuiteName) - 1] = '\0';
|
---|
1802 | }
|
---|
1803 | sslInfo->keySize = session->keySz;
|
---|
1804 | #ifdef HAVE_SNI
|
---|
1805 | if (NULL != session->sni) {
|
---|
1806 | XSTRNCPY((char*)sslInfo->serverNameIndication,
|
---|
1807 | session->sni, sizeof(sslInfo->serverNameIndication));
|
---|
1808 | sslInfo->serverNameIndication
|
---|
1809 | [sizeof(sslInfo->serverNameIndication) - 1] = '\0';
|
---|
1810 | }
|
---|
1811 | #endif
|
---|
1812 | TraceSessionInfo(sslInfo);
|
---|
1813 | }
|
---|
1814 | }
|
---|
1815 | }
|
---|
1816 |
|
---|
1817 |
|
---|
1818 | /* Call the session connection start callback. */
|
---|
1819 | static void CallConnectionCb(SnifferSession* session)
|
---|
1820 | {
|
---|
1821 | if (ConnectionCb != NULL) {
|
---|
1822 | SSLInfo info;
|
---|
1823 | CopySessionInfo(session, &info);
|
---|
1824 | ConnectionCb((const void*)session, &info, ConnectionCbCtx);
|
---|
1825 | }
|
---|
1826 | }
|
---|
1827 |
|
---|
1828 |
|
---|
1829 | /* Process Client Key Exchange, RSA or static ECDH */
|
---|
1830 | static int ProcessClientKeyExchange(const byte* input, int* sslBytes,
|
---|
1831 | SnifferSession* session, char* error)
|
---|
1832 | {
|
---|
1833 | word32 idx = 0;
|
---|
1834 | int tryEcc = 0;
|
---|
1835 | int ret;
|
---|
1836 |
|
---|
1837 | if (session->sslServer->buffers.key == NULL ||
|
---|
1838 | session->sslServer->buffers.key->buffer == NULL ||
|
---|
1839 | session->sslServer->buffers.key->length == 0) {
|
---|
1840 |
|
---|
1841 | SetError(RSA_KEY_MISSING_STR, error, session, FATAL_ERROR_STATE);
|
---|
1842 | return -1;
|
---|
1843 | }
|
---|
1844 |
|
---|
1845 | {
|
---|
1846 | RsaKey key;
|
---|
1847 | int length;
|
---|
1848 |
|
---|
1849 | ret = wc_InitRsaKey(&key, 0);
|
---|
1850 | if (ret == 0) {
|
---|
1851 | ret = wc_RsaPrivateKeyDecode(
|
---|
1852 | session->sslServer->buffers.key->buffer,
|
---|
1853 | &idx, &key, session->sslServer->buffers.key->length);
|
---|
1854 | if (ret != 0) {
|
---|
1855 | tryEcc = 1;
|
---|
1856 | #ifndef HAVE_ECC
|
---|
1857 | SetError(RSA_DECODE_STR, error, session, FATAL_ERROR_STATE);
|
---|
1858 | #else
|
---|
1859 | /* If we can do ECC, this isn't fatal. Not loading an ECC
|
---|
1860 | * key will be fatal, though. */
|
---|
1861 | SetError(RSA_DECODE_STR, error, session, 0);
|
---|
1862 | #endif
|
---|
1863 | }
|
---|
1864 | }
|
---|
1865 |
|
---|
1866 | if (ret == 0) {
|
---|
1867 | length = wc_RsaEncryptSize(&key);
|
---|
1868 | if (IsTLS(session->sslServer)) {
|
---|
1869 | input += 2; /* tls pre length */
|
---|
1870 | }
|
---|
1871 |
|
---|
1872 | if (length > *sslBytes) {
|
---|
1873 | SetError(PARTIAL_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
1874 | ret = -1;
|
---|
1875 | }
|
---|
1876 | }
|
---|
1877 |
|
---|
1878 | #ifdef WC_RSA_BLINDING
|
---|
1879 | if (ret == 0) {
|
---|
1880 | ret = wc_RsaSetRNG(&key, session->sslServer->rng);
|
---|
1881 | if (ret != 0) {
|
---|
1882 | SetError(RSA_DECRYPT_STR, error, session, FATAL_ERROR_STATE);
|
---|
1883 | }
|
---|
1884 | }
|
---|
1885 | #endif
|
---|
1886 |
|
---|
1887 | if (ret == 0) {
|
---|
1888 | session->keySz = length * WOLFSSL_BIT_SIZE;
|
---|
1889 | /* length is the key size in bytes */
|
---|
1890 | session->sslServer->arrays->preMasterSz = SECRET_LEN;
|
---|
1891 |
|
---|
1892 | do {
|
---|
1893 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
1894 | ret = wc_AsyncWait(ret, &key.asyncDev,
|
---|
1895 | WC_ASYNC_FLAG_CALL_AGAIN);
|
---|
1896 | #endif
|
---|
1897 | if (ret >= 0) {
|
---|
1898 | ret = wc_RsaPrivateDecrypt(input, length,
|
---|
1899 | session->sslServer->arrays->preMasterSecret,
|
---|
1900 | session->sslServer->arrays->preMasterSz, &key);
|
---|
1901 | }
|
---|
1902 | } while (ret == WC_PENDING_E);
|
---|
1903 |
|
---|
1904 | if (ret != SECRET_LEN) {
|
---|
1905 | SetError(RSA_DECRYPT_STR, error, session, FATAL_ERROR_STATE);
|
---|
1906 | }
|
---|
1907 | }
|
---|
1908 |
|
---|
1909 | wc_FreeRsaKey(&key);
|
---|
1910 | }
|
---|
1911 |
|
---|
1912 | if (tryEcc) {
|
---|
1913 | #ifdef HAVE_ECC
|
---|
1914 | ecc_key key;
|
---|
1915 | ecc_key pubKey;
|
---|
1916 | int length, keyInit = 0, pubKeyInit = 0;
|
---|
1917 |
|
---|
1918 | idx = 0;
|
---|
1919 | ret = wc_ecc_init(&key);
|
---|
1920 | if (ret == 0) {
|
---|
1921 | keyInit = 1;
|
---|
1922 | ret = wc_ecc_init(&pubKey);
|
---|
1923 | }
|
---|
1924 | if (ret == 0) {
|
---|
1925 | pubKeyInit = 1;
|
---|
1926 | ret = wc_EccPrivateKeyDecode(
|
---|
1927 | session->sslServer->buffers.key->buffer,
|
---|
1928 | &idx, &key, session->sslServer->buffers.key->length);
|
---|
1929 | if (ret != 0) {
|
---|
1930 | SetError(ECC_DECODE_STR, error, session, FATAL_ERROR_STATE);
|
---|
1931 | }
|
---|
1932 | }
|
---|
1933 |
|
---|
1934 | if (ret == 0) {
|
---|
1935 | length = wc_ecc_size(&key) * 2 + 1;
|
---|
1936 | /* The length should be 2 times the key size (x and y), plus 1
|
---|
1937 | * for the type byte. */
|
---|
1938 | if (IsTLS(session->sslServer)) {
|
---|
1939 | input += 1; /* Don't include the TLS length for the key. */
|
---|
1940 | }
|
---|
1941 |
|
---|
1942 | if (length + 1 > *sslBytes) {
|
---|
1943 | SetError(PARTIAL_INPUT_STR,
|
---|
1944 | error, session, FATAL_ERROR_STATE);
|
---|
1945 | ret = -1;
|
---|
1946 | }
|
---|
1947 | }
|
---|
1948 |
|
---|
1949 | if (ret == 0) {
|
---|
1950 | ret = wc_ecc_import_x963_ex(input, length, &pubKey, ECC_CURVE_DEF);
|
---|
1951 | if (ret != 0) {
|
---|
1952 | SetError(ECC_PUB_DECODE_STR, error, session, FATAL_ERROR_STATE);
|
---|
1953 | }
|
---|
1954 | }
|
---|
1955 |
|
---|
1956 | if (ret == 0) {
|
---|
1957 | session->keySz = ((length - 1) / 2) * WOLFSSL_BIT_SIZE;
|
---|
1958 | /* Length is in bytes. Subtract 1 for the ECC key type. Divide
|
---|
1959 | * by two as the key is in (x,y) coordinates, where x and y are
|
---|
1960 | * the same size, the key size. Convert from bytes to bits. */
|
---|
1961 | session->sslServer->arrays->preMasterSz = ENCRYPT_LEN;
|
---|
1962 |
|
---|
1963 | do {
|
---|
1964 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
1965 | ret = wc_AsyncWait(ret, &key.asyncDev,
|
---|
1966 | WC_ASYNC_FLAG_CALL_AGAIN);
|
---|
1967 | #endif
|
---|
1968 | if (ret >= 0) {
|
---|
1969 | ret = wc_ecc_shared_secret(&key, &pubKey,
|
---|
1970 | session->sslServer->arrays->preMasterSecret,
|
---|
1971 | &session->sslServer->arrays->preMasterSz);
|
---|
1972 | }
|
---|
1973 | } while (ret == WC_PENDING_E);
|
---|
1974 | }
|
---|
1975 |
|
---|
1976 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
1977 | if (ret != 0)
|
---|
1978 | INC_STAT(SnifferStats.sslKeyFails);
|
---|
1979 | #endif
|
---|
1980 |
|
---|
1981 | if (keyInit)
|
---|
1982 | wc_ecc_free(&key);
|
---|
1983 | if (pubKeyInit)
|
---|
1984 | wc_ecc_free(&pubKey);
|
---|
1985 | #endif
|
---|
1986 | }
|
---|
1987 |
|
---|
1988 | /* store for client side as well */
|
---|
1989 | XMEMCPY(session->sslClient->arrays->preMasterSecret,
|
---|
1990 | session->sslServer->arrays->preMasterSecret,
|
---|
1991 | session->sslServer->arrays->preMasterSz);
|
---|
1992 | session->sslClient->arrays->preMasterSz =
|
---|
1993 | session->sslServer->arrays->preMasterSz;
|
---|
1994 |
|
---|
1995 | #ifdef SHOW_SECRETS
|
---|
1996 | {
|
---|
1997 | word32 i;
|
---|
1998 | printf("pre master secret: ");
|
---|
1999 | for (i = 0; i < session->sslServer->arrays->preMasterSz; i++)
|
---|
2000 | printf("%02x", session->sslServer->arrays->preMasterSecret[i]);
|
---|
2001 | printf("\n");
|
---|
2002 | }
|
---|
2003 | #endif
|
---|
2004 |
|
---|
2005 | if (SetCipherSpecs(session->sslServer) != 0) {
|
---|
2006 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE);
|
---|
2007 | return -1;
|
---|
2008 | }
|
---|
2009 |
|
---|
2010 | if (SetCipherSpecs(session->sslClient) != 0) {
|
---|
2011 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE);
|
---|
2012 | return -1;
|
---|
2013 | }
|
---|
2014 |
|
---|
2015 | ret = MakeMasterSecret(session->sslServer);
|
---|
2016 | ret += MakeMasterSecret(session->sslClient);
|
---|
2017 | ret += SetKeysSide(session->sslServer, ENCRYPT_AND_DECRYPT_SIDE);
|
---|
2018 | ret += SetKeysSide(session->sslClient, ENCRYPT_AND_DECRYPT_SIDE);
|
---|
2019 |
|
---|
2020 | if (ret != 0) {
|
---|
2021 | SetError(BAD_DERIVE_STR, error, session, FATAL_ERROR_STATE);
|
---|
2022 | return -1;
|
---|
2023 | }
|
---|
2024 |
|
---|
2025 | #ifdef SHOW_SECRETS
|
---|
2026 | {
|
---|
2027 | int i;
|
---|
2028 | printf("server master secret: ");
|
---|
2029 | for (i = 0; i < SECRET_LEN; i++)
|
---|
2030 | printf("%02x", session->sslServer->arrays->masterSecret[i]);
|
---|
2031 | printf("\n");
|
---|
2032 |
|
---|
2033 | printf("client master secret: ");
|
---|
2034 | for (i = 0; i < SECRET_LEN; i++)
|
---|
2035 | printf("%02x", session->sslClient->arrays->masterSecret[i]);
|
---|
2036 | printf("\n");
|
---|
2037 |
|
---|
2038 | printf("server suite = %d\n", session->sslServer->options.cipherSuite);
|
---|
2039 | printf("client suite = %d\n", session->sslClient->options.cipherSuite);
|
---|
2040 | }
|
---|
2041 | #endif
|
---|
2042 |
|
---|
2043 | CallConnectionCb(session);
|
---|
2044 |
|
---|
2045 | return ret;
|
---|
2046 | }
|
---|
2047 |
|
---|
2048 |
|
---|
2049 | /* Process Session Ticket */
|
---|
2050 | static int ProcessSessionTicket(const byte* input, int* sslBytes,
|
---|
2051 | SnifferSession* session, char* error)
|
---|
2052 | {
|
---|
2053 | word16 len;
|
---|
2054 |
|
---|
2055 | /* make sure can read through hint and len */
|
---|
2056 | if (TICKET_HINT_LEN + LENGTH_SZ > *sslBytes) {
|
---|
2057 | SetError(BAD_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
2058 | return -1;
|
---|
2059 | }
|
---|
2060 |
|
---|
2061 | input += TICKET_HINT_LEN; /* skip over hint */
|
---|
2062 | *sslBytes -= TICKET_HINT_LEN;
|
---|
2063 |
|
---|
2064 | len = (word16)((input[0] << 8) | input[1]);
|
---|
2065 | input += LENGTH_SZ;
|
---|
2066 | *sslBytes -= LENGTH_SZ;
|
---|
2067 |
|
---|
2068 | /* make sure can read through ticket */
|
---|
2069 | if (len > *sslBytes || len < ID_LEN) {
|
---|
2070 | SetError(BAD_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
2071 | return -1;
|
---|
2072 | }
|
---|
2073 |
|
---|
2074 | /* store session with macID as sessionID */
|
---|
2075 | session->sslServer->options.haveSessionId = 1;
|
---|
2076 | XMEMCPY(session->sslServer->arrays->sessionID, input + len - ID_LEN,ID_LEN);
|
---|
2077 |
|
---|
2078 | return 0;
|
---|
2079 | }
|
---|
2080 |
|
---|
2081 |
|
---|
2082 | /* Process Server Hello */
|
---|
2083 | static int ProcessServerHello(int msgSz, const byte* input, int* sslBytes,
|
---|
2084 | SnifferSession* session, char* error)
|
---|
2085 | {
|
---|
2086 | ProtocolVersion pv;
|
---|
2087 | byte b, b0;
|
---|
2088 | int toRead = VERSION_SZ + RAN_LEN + ENUM_LEN;
|
---|
2089 | int doResume = 0;
|
---|
2090 | int initialBytes = *sslBytes;
|
---|
2091 |
|
---|
2092 | (void)msgSz;
|
---|
2093 | (void)initialBytes;
|
---|
2094 |
|
---|
2095 | /* make sure we didn't miss ClientHello */
|
---|
2096 | if (session->flags.clientHello == 0) {
|
---|
2097 | SetError(MISSED_CLIENT_HELLO_STR, error, session, FATAL_ERROR_STATE);
|
---|
2098 | return -1;
|
---|
2099 | }
|
---|
2100 |
|
---|
2101 | /* make sure can read through session len */
|
---|
2102 | if (toRead > *sslBytes) {
|
---|
2103 | SetError(SERVER_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
2104 | return -1;
|
---|
2105 | }
|
---|
2106 |
|
---|
2107 | XMEMCPY(&pv, input, VERSION_SZ);
|
---|
2108 | input += VERSION_SZ;
|
---|
2109 | *sslBytes -= VERSION_SZ;
|
---|
2110 |
|
---|
2111 | session->sslServer->version = pv;
|
---|
2112 | session->sslClient->version = pv;
|
---|
2113 |
|
---|
2114 | XMEMCPY(session->sslServer->arrays->serverRandom, input, RAN_LEN);
|
---|
2115 | XMEMCPY(session->sslClient->arrays->serverRandom, input, RAN_LEN);
|
---|
2116 | input += RAN_LEN;
|
---|
2117 | *sslBytes -= RAN_LEN;
|
---|
2118 |
|
---|
2119 | b = *input++;
|
---|
2120 | *sslBytes -= 1;
|
---|
2121 |
|
---|
2122 | /* make sure can read through compression */
|
---|
2123 | if ( (b + SUITE_LEN + ENUM_LEN) > *sslBytes) {
|
---|
2124 | SetError(SERVER_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
2125 | return -1;
|
---|
2126 | }
|
---|
2127 | if (b) {
|
---|
2128 | XMEMCPY(session->sslServer->arrays->sessionID, input, ID_LEN);
|
---|
2129 | session->sslServer->options.haveSessionId = 1;
|
---|
2130 | }
|
---|
2131 | input += b;
|
---|
2132 | *sslBytes -= b;
|
---|
2133 |
|
---|
2134 | /* cipher suite */
|
---|
2135 | b0 = *input++; /* first byte, ECC or not */
|
---|
2136 | session->sslServer->options.cipherSuite0 = b0;
|
---|
2137 | session->sslClient->options.cipherSuite0 = b0;
|
---|
2138 | b = *input++;
|
---|
2139 | session->sslServer->options.cipherSuite = b;
|
---|
2140 | session->sslClient->options.cipherSuite = b;
|
---|
2141 | *sslBytes -= SUITE_LEN;
|
---|
2142 |
|
---|
2143 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
2144 | {
|
---|
2145 | const CipherSuiteInfo* suites = GetCipherNames();
|
---|
2146 | int suitesSz = GetCipherNamesSize();
|
---|
2147 | int match = 0;
|
---|
2148 |
|
---|
2149 | while (suitesSz) {
|
---|
2150 | if (b0 == suites->cipherSuite0 && b == suites->cipherSuite) {
|
---|
2151 | match = 1;
|
---|
2152 | break;
|
---|
2153 | }
|
---|
2154 | suites++;
|
---|
2155 | suitesSz--;
|
---|
2156 | }
|
---|
2157 | if (!match)
|
---|
2158 | INC_STAT(SnifferStats.sslCiphersUnsupported);
|
---|
2159 | }
|
---|
2160 | #endif /* WOLFSSL_SNIFFER_STATS */
|
---|
2161 |
|
---|
2162 | /* compression */
|
---|
2163 | b = *input++;
|
---|
2164 | *sslBytes -= ENUM_LEN;
|
---|
2165 |
|
---|
2166 | if (b) {
|
---|
2167 | SetError(BAD_COMPRESSION_STR, error, session, FATAL_ERROR_STATE);
|
---|
2168 | return -1;
|
---|
2169 | }
|
---|
2170 |
|
---|
2171 | #ifdef HAVE_EXTENDED_MASTER
|
---|
2172 | /* extensions */
|
---|
2173 | if ((initialBytes - *sslBytes) < msgSz) {
|
---|
2174 | word16 len;
|
---|
2175 |
|
---|
2176 | /* skip extensions until extended master secret */
|
---|
2177 | /* make sure can read len */
|
---|
2178 | if (SUITE_LEN > *sslBytes) {
|
---|
2179 | SetError(SERVER_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
2180 | return -1;
|
---|
2181 | }
|
---|
2182 | len = (word16)((input[0] << 8) | input[1]);
|
---|
2183 | input += SUITE_LEN;
|
---|
2184 | *sslBytes -= SUITE_LEN;
|
---|
2185 | /* make sure can read through all extensions */
|
---|
2186 | if (len > *sslBytes) {
|
---|
2187 | SetError(SERVER_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
2188 | return -1;
|
---|
2189 | }
|
---|
2190 |
|
---|
2191 | while (len >= EXT_TYPE_SZ + LENGTH_SZ) {
|
---|
2192 | byte extType[EXT_TYPE_SZ];
|
---|
2193 | word16 extLen;
|
---|
2194 |
|
---|
2195 | extType[0] = input[0];
|
---|
2196 | extType[1] = input[1];
|
---|
2197 | input += EXT_TYPE_SZ;
|
---|
2198 | *sslBytes -= EXT_TYPE_SZ;
|
---|
2199 |
|
---|
2200 | extLen = (word16)((input[0] << 8) | input[1]);
|
---|
2201 | input += LENGTH_SZ;
|
---|
2202 | *sslBytes -= LENGTH_SZ;
|
---|
2203 |
|
---|
2204 | /* make sure can read through individual extension */
|
---|
2205 | if (extLen > *sslBytes) {
|
---|
2206 | SetError(SERVER_HELLO_INPUT_STR, error, session,
|
---|
2207 | FATAL_ERROR_STATE);
|
---|
2208 | return -1;
|
---|
2209 | }
|
---|
2210 |
|
---|
2211 | if (extType[0] == 0x00 && extType[1] == EXT_MASTER_SECRET) {
|
---|
2212 | session->flags.expectEms = 1;
|
---|
2213 | }
|
---|
2214 |
|
---|
2215 | input += extLen;
|
---|
2216 | *sslBytes -= extLen;
|
---|
2217 | len -= extLen + EXT_TYPE_SZ + LENGTH_SZ;
|
---|
2218 | }
|
---|
2219 | }
|
---|
2220 |
|
---|
2221 | if (!session->flags.expectEms) {
|
---|
2222 | XFREE(session->hash, NULL, DYNAMIC_TYPE_HASHES);
|
---|
2223 | session->hash = NULL;
|
---|
2224 | }
|
---|
2225 | #endif
|
---|
2226 |
|
---|
2227 | if (session->sslServer->options.haveSessionId) {
|
---|
2228 | if (XMEMCMP(session->sslServer->arrays->sessionID,
|
---|
2229 | session->sslClient->arrays->sessionID, ID_LEN) == 0)
|
---|
2230 | doResume = 1;
|
---|
2231 | }
|
---|
2232 | else if (session->sslClient->options.haveSessionId == 0 &&
|
---|
2233 | session->sslServer->options.haveSessionId == 0 &&
|
---|
2234 | session->ticketID)
|
---|
2235 | doResume = 1;
|
---|
2236 |
|
---|
2237 | if (session->ticketID && doResume) {
|
---|
2238 | /* use ticketID to retrieve from session, prefer over sessionID */
|
---|
2239 | XMEMCPY(session->sslServer->arrays->sessionID,session->ticketID,ID_LEN);
|
---|
2240 | session->sslServer->options.haveSessionId = 1; /* may not have
|
---|
2241 | actual sessionID */
|
---|
2242 | }
|
---|
2243 |
|
---|
2244 | if (doResume ) {
|
---|
2245 | int ret = 0;
|
---|
2246 | SSL_SESSION* resume = GetSession(session->sslServer,
|
---|
2247 | session->sslServer->arrays->masterSecret, 0);
|
---|
2248 | if (resume == NULL) {
|
---|
2249 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
2250 | INC_STAT(SnifferStats.sslResumeMisses);
|
---|
2251 | #endif
|
---|
2252 | SetError(BAD_SESSION_RESUME_STR, error, session, FATAL_ERROR_STATE);
|
---|
2253 | return -1;
|
---|
2254 | }
|
---|
2255 | /* make sure client has master secret too */
|
---|
2256 | XMEMCPY(session->sslClient->arrays->masterSecret,
|
---|
2257 | session->sslServer->arrays->masterSecret, SECRET_LEN);
|
---|
2258 | session->flags.resuming = 1;
|
---|
2259 |
|
---|
2260 | Trace(SERVER_DID_RESUMPTION_STR);
|
---|
2261 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
2262 | INC_STAT(SnifferStats.sslResumedConns);
|
---|
2263 | INC_STAT(SnifferStats.sslResumptionValid);
|
---|
2264 | #endif
|
---|
2265 | if (SetCipherSpecs(session->sslServer) != 0) {
|
---|
2266 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE);
|
---|
2267 | return -1;
|
---|
2268 | }
|
---|
2269 |
|
---|
2270 | if (SetCipherSpecs(session->sslClient) != 0) {
|
---|
2271 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE);
|
---|
2272 | return -1;
|
---|
2273 | }
|
---|
2274 |
|
---|
2275 | if (session->sslServer->options.tls) {
|
---|
2276 | ret = DeriveTlsKeys(session->sslServer);
|
---|
2277 | ret += DeriveTlsKeys(session->sslClient);
|
---|
2278 | }
|
---|
2279 | else {
|
---|
2280 | ret = DeriveKeys(session->sslServer);
|
---|
2281 | ret += DeriveKeys(session->sslClient);
|
---|
2282 | }
|
---|
2283 | ret += SetKeysSide(session->sslServer, ENCRYPT_AND_DECRYPT_SIDE);
|
---|
2284 | ret += SetKeysSide(session->sslClient, ENCRYPT_AND_DECRYPT_SIDE);
|
---|
2285 |
|
---|
2286 | if (ret != 0) {
|
---|
2287 | SetError(BAD_DERIVE_STR, error, session, FATAL_ERROR_STATE);
|
---|
2288 | return -1;
|
---|
2289 | }
|
---|
2290 | }
|
---|
2291 | else {
|
---|
2292 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
2293 | INC_STAT(SnifferStats.sslStandardConns);
|
---|
2294 | #endif
|
---|
2295 | }
|
---|
2296 | #ifdef SHOW_SECRETS
|
---|
2297 | {
|
---|
2298 | int i;
|
---|
2299 | printf("cipher suite = 0x%02x\n",
|
---|
2300 | session->sslServer->options.cipherSuite);
|
---|
2301 | printf("server random: ");
|
---|
2302 | for (i = 0; i < RAN_LEN; i++)
|
---|
2303 | printf("%02x", session->sslServer->arrays->serverRandom[i]);
|
---|
2304 | printf("\n");
|
---|
2305 | }
|
---|
2306 | #endif
|
---|
2307 | return 0;
|
---|
2308 | }
|
---|
2309 |
|
---|
2310 |
|
---|
2311 | /* Process normal Client Hello */
|
---|
2312 | static int ProcessClientHello(const byte* input, int* sslBytes,
|
---|
2313 | SnifferSession* session, char* error)
|
---|
2314 | {
|
---|
2315 | byte bLen;
|
---|
2316 | word16 len;
|
---|
2317 | int toRead = VERSION_SZ + RAN_LEN + ENUM_LEN;
|
---|
2318 |
|
---|
2319 | #ifdef HAVE_SNI
|
---|
2320 | {
|
---|
2321 | byte name[MAX_SERVER_NAME];
|
---|
2322 | word32 nameSz = sizeof(name);
|
---|
2323 | int ret;
|
---|
2324 |
|
---|
2325 | ret = wolfSSL_SNI_GetFromBuffer(
|
---|
2326 | input - HANDSHAKE_HEADER_SZ - RECORD_HEADER_SZ,
|
---|
2327 | *sslBytes + HANDSHAKE_HEADER_SZ + RECORD_HEADER_SZ,
|
---|
2328 | WOLFSSL_SNI_HOST_NAME, name, &nameSz);
|
---|
2329 |
|
---|
2330 | if (ret == WOLFSSL_SUCCESS) {
|
---|
2331 | NamedKey* namedKey;
|
---|
2332 |
|
---|
2333 | if (nameSz > sizeof(name) - 1)
|
---|
2334 | nameSz = sizeof(name) - 1;
|
---|
2335 | name[nameSz] = 0;
|
---|
2336 | wc_LockMutex(&session->context->namedKeysMutex);
|
---|
2337 | namedKey = session->context->namedKeys;
|
---|
2338 | while (namedKey != NULL) {
|
---|
2339 | if (nameSz == namedKey->nameSz &&
|
---|
2340 | XSTRNCMP((char*)name, namedKey->name, nameSz) == 0) {
|
---|
2341 | if (wolfSSL_use_PrivateKey_buffer(session->sslServer,
|
---|
2342 | namedKey->key, namedKey->keySz,
|
---|
2343 | WOLFSSL_FILETYPE_ASN1) != WOLFSSL_SUCCESS) {
|
---|
2344 | wc_UnLockMutex(&session->context->namedKeysMutex);
|
---|
2345 | SetError(CLIENT_HELLO_LATE_KEY_STR, error, session,
|
---|
2346 | FATAL_ERROR_STATE);
|
---|
2347 | return -1;
|
---|
2348 | }
|
---|
2349 | session->sni = namedKey->name;
|
---|
2350 | break;
|
---|
2351 | }
|
---|
2352 | else
|
---|
2353 | namedKey = namedKey->next;
|
---|
2354 | }
|
---|
2355 | wc_UnLockMutex(&session->context->namedKeysMutex);
|
---|
2356 | }
|
---|
2357 | }
|
---|
2358 | #endif
|
---|
2359 |
|
---|
2360 | session->flags.clientHello = 1; /* don't process again */
|
---|
2361 |
|
---|
2362 | /* make sure can read up to session len */
|
---|
2363 | if (toRead > *sslBytes) {
|
---|
2364 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
2365 | return -1;
|
---|
2366 | }
|
---|
2367 |
|
---|
2368 | /* skip, get negotiated one from server hello */
|
---|
2369 | input += VERSION_SZ;
|
---|
2370 | *sslBytes -= VERSION_SZ;
|
---|
2371 |
|
---|
2372 | XMEMCPY(session->sslServer->arrays->clientRandom, input, RAN_LEN);
|
---|
2373 | XMEMCPY(session->sslClient->arrays->clientRandom, input, RAN_LEN);
|
---|
2374 |
|
---|
2375 | input += RAN_LEN;
|
---|
2376 | *sslBytes -= RAN_LEN;
|
---|
2377 |
|
---|
2378 | /* store session in case trying to resume */
|
---|
2379 | bLen = *input++;
|
---|
2380 | *sslBytes -= ENUM_LEN;
|
---|
2381 | if (bLen) {
|
---|
2382 | if (ID_LEN > *sslBytes) {
|
---|
2383 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
2384 | return -1;
|
---|
2385 | }
|
---|
2386 | Trace(CLIENT_RESUME_TRY_STR);
|
---|
2387 | XMEMCPY(session->sslClient->arrays->sessionID, input, ID_LEN);
|
---|
2388 | session->sslClient->options.haveSessionId = 1;
|
---|
2389 | }
|
---|
2390 | #ifdef SHOW_SECRETS
|
---|
2391 | {
|
---|
2392 | int i;
|
---|
2393 | printf("client random: ");
|
---|
2394 | for (i = 0; i < RAN_LEN; i++)
|
---|
2395 | printf("%02x", session->sslServer->arrays->clientRandom[i]);
|
---|
2396 | printf("\n");
|
---|
2397 | }
|
---|
2398 | #endif
|
---|
2399 |
|
---|
2400 | input += bLen;
|
---|
2401 | *sslBytes -= bLen;
|
---|
2402 |
|
---|
2403 | /* skip cipher suites */
|
---|
2404 | /* make sure can read len */
|
---|
2405 | if (SUITE_LEN > *sslBytes) {
|
---|
2406 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
2407 | return -1;
|
---|
2408 | }
|
---|
2409 | len = (word16)((input[0] << 8) | input[1]);
|
---|
2410 | input += SUITE_LEN;
|
---|
2411 | *sslBytes -= SUITE_LEN;
|
---|
2412 | /* make sure can read suites + comp len */
|
---|
2413 | if (len + ENUM_LEN > *sslBytes) {
|
---|
2414 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
2415 | return -1;
|
---|
2416 | }
|
---|
2417 | input += len;
|
---|
2418 | *sslBytes -= len;
|
---|
2419 |
|
---|
2420 | /* skip compression */
|
---|
2421 | bLen = *input++;
|
---|
2422 | *sslBytes -= ENUM_LEN;
|
---|
2423 | /* make sure can read len */
|
---|
2424 | if (bLen > *sslBytes) {
|
---|
2425 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
2426 | return -1;
|
---|
2427 | }
|
---|
2428 | input += bLen;
|
---|
2429 | *sslBytes -= bLen;
|
---|
2430 |
|
---|
2431 | if (*sslBytes == 0) {
|
---|
2432 | /* no extensions */
|
---|
2433 | return 0;
|
---|
2434 | }
|
---|
2435 |
|
---|
2436 | /* skip extensions until session ticket */
|
---|
2437 | /* make sure can read len */
|
---|
2438 | if (SUITE_LEN > *sslBytes) {
|
---|
2439 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
2440 | return -1;
|
---|
2441 | }
|
---|
2442 | len = (word16)((input[0] << 8) | input[1]);
|
---|
2443 | input += SUITE_LEN;
|
---|
2444 | *sslBytes -= SUITE_LEN;
|
---|
2445 | /* make sure can read through all extensions */
|
---|
2446 | if (len > *sslBytes) {
|
---|
2447 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
2448 | return -1;
|
---|
2449 | }
|
---|
2450 |
|
---|
2451 | while (len >= EXT_TYPE_SZ + LENGTH_SZ) {
|
---|
2452 | byte extType[EXT_TYPE_SZ];
|
---|
2453 | word16 extLen;
|
---|
2454 |
|
---|
2455 | extType[0] = input[0];
|
---|
2456 | extType[1] = input[1];
|
---|
2457 | input += EXT_TYPE_SZ;
|
---|
2458 | *sslBytes -= EXT_TYPE_SZ;
|
---|
2459 |
|
---|
2460 | extLen = (word16)((input[0] << 8) | input[1]);
|
---|
2461 | input += LENGTH_SZ;
|
---|
2462 | *sslBytes -= LENGTH_SZ;
|
---|
2463 |
|
---|
2464 | /* make sure can read through individual extension */
|
---|
2465 | if (extLen > *sslBytes) {
|
---|
2466 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
2467 | return -1;
|
---|
2468 | }
|
---|
2469 |
|
---|
2470 | if (extType[0] == 0x00 && extType[1] == TICKET_EXT_ID) {
|
---|
2471 |
|
---|
2472 | /* make sure can read through ticket if there is a non blank one */
|
---|
2473 | if (extLen && extLen < ID_LEN) {
|
---|
2474 | SetError(CLIENT_HELLO_INPUT_STR, error, session,
|
---|
2475 | FATAL_ERROR_STATE);
|
---|
2476 | return -1;
|
---|
2477 | }
|
---|
2478 |
|
---|
2479 | if (extLen) {
|
---|
2480 | if (session->ticketID == 0) {
|
---|
2481 | session->ticketID = (byte*)XMALLOC(ID_LEN,
|
---|
2482 | NULL, DYNAMIC_TYPE_SNIFFER_TICKET_ID);
|
---|
2483 | if (session->ticketID == 0) {
|
---|
2484 | SetError(MEMORY_STR, error, session,
|
---|
2485 | FATAL_ERROR_STATE);
|
---|
2486 | return -1;
|
---|
2487 | }
|
---|
2488 | }
|
---|
2489 | XMEMCPY(session->ticketID, input + extLen - ID_LEN, ID_LEN);
|
---|
2490 | }
|
---|
2491 | }
|
---|
2492 |
|
---|
2493 | input += extLen;
|
---|
2494 | *sslBytes -= extLen;
|
---|
2495 | len -= extLen + EXT_TYPE_SZ + LENGTH_SZ;
|
---|
2496 | }
|
---|
2497 |
|
---|
2498 | return 0;
|
---|
2499 | }
|
---|
2500 |
|
---|
2501 |
|
---|
2502 | #ifdef WOLFSSL_SNIFFER_WATCH
|
---|
2503 |
|
---|
2504 | /* Process Certificate */
|
---|
2505 | static int ProcessCertificate(const byte* input, int* sslBytes,
|
---|
2506 | SnifferSession* session, char* error)
|
---|
2507 | {
|
---|
2508 | Sha256 sha;
|
---|
2509 | const byte* certChain;
|
---|
2510 | word32 certChainSz;
|
---|
2511 | word32 certSz;
|
---|
2512 | int ret;
|
---|
2513 | byte digest[SHA256_DIGEST_SIZE];
|
---|
2514 |
|
---|
2515 | /* If the receiver is the server, this is the client certificate message,
|
---|
2516 | * and it should be ignored at this point. */
|
---|
2517 | if (session->flags.side == WOLFSSL_SERVER_END)
|
---|
2518 | return 0;
|
---|
2519 |
|
---|
2520 | if (WatchCb == NULL) {
|
---|
2521 | SetError(WATCH_CB_MISSING_STR, error, session, FATAL_ERROR_STATE);
|
---|
2522 | return -1;
|
---|
2523 | }
|
---|
2524 |
|
---|
2525 | if (*sslBytes < CERT_HEADER_SZ) {
|
---|
2526 | SetError(BAD_CERT_MSG_STR, error, session, FATAL_ERROR_STATE);
|
---|
2527 | return -1;
|
---|
2528 | }
|
---|
2529 | ato24(input, &certChainSz);
|
---|
2530 | *sslBytes -= CERT_HEADER_SZ;
|
---|
2531 | input += CERT_HEADER_SZ;
|
---|
2532 |
|
---|
2533 | if (*sslBytes < (int)certChainSz) {
|
---|
2534 | SetError(BAD_CERT_MSG_STR, error, session, FATAL_ERROR_STATE);
|
---|
2535 | return -1;
|
---|
2536 | }
|
---|
2537 | certChain = input;
|
---|
2538 |
|
---|
2539 | ato24(input, &certSz);
|
---|
2540 | input += OPAQUE24_LEN;
|
---|
2541 | if (*sslBytes < (int)certSz) {
|
---|
2542 | SetError(BAD_CERT_MSG_STR, error, session, FATAL_ERROR_STATE);
|
---|
2543 | return -1;
|
---|
2544 | }
|
---|
2545 |
|
---|
2546 | *sslBytes -= certChainSz;
|
---|
2547 |
|
---|
2548 | ret = wc_InitSha256(&sha);
|
---|
2549 | if (ret == 0)
|
---|
2550 | ret = wc_Sha256Update(&sha, input, certSz);
|
---|
2551 | if (ret == 0)
|
---|
2552 | ret = wc_Sha256Final(&sha, digest);
|
---|
2553 | if (ret != 0) {
|
---|
2554 | SetError(WATCH_HASH_STR, error, session, FATAL_ERROR_STATE);
|
---|
2555 | return -1;
|
---|
2556 | }
|
---|
2557 |
|
---|
2558 | ret = WatchCb((void*)session, digest, sizeof(digest),
|
---|
2559 | certChain, certChainSz, WatchCbCtx, error);
|
---|
2560 | if (ret != 0) {
|
---|
2561 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
2562 | INC_STAT(SnifferStats.sslKeysUnmatched);
|
---|
2563 | #endif
|
---|
2564 | SetError(WATCH_FAIL_STR, error, session, FATAL_ERROR_STATE);
|
---|
2565 | return -1;
|
---|
2566 | }
|
---|
2567 | else {
|
---|
2568 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
2569 | INC_STAT(SnifferStats.sslKeyMatches);
|
---|
2570 | #endif
|
---|
2571 | }
|
---|
2572 |
|
---|
2573 | return 0;
|
---|
2574 | }
|
---|
2575 |
|
---|
2576 | #endif
|
---|
2577 |
|
---|
2578 |
|
---|
2579 | /* Process Finished */
|
---|
2580 | static int ProcessFinished(const byte* input, int size, int* sslBytes,
|
---|
2581 | SnifferSession* session, char* error)
|
---|
2582 | {
|
---|
2583 | SSL* ssl;
|
---|
2584 | word32 inOutIdx = 0;
|
---|
2585 | int ret;
|
---|
2586 |
|
---|
2587 | if (session->flags.side == WOLFSSL_SERVER_END)
|
---|
2588 | ssl = session->sslServer;
|
---|
2589 | else
|
---|
2590 | ssl = session->sslClient;
|
---|
2591 |
|
---|
2592 | ret = DoFinished(ssl, input, &inOutIdx, (word32) size, (word32) *sslBytes,
|
---|
2593 | SNIFF);
|
---|
2594 | *sslBytes -= (int)inOutIdx;
|
---|
2595 |
|
---|
2596 | if (ret < 0) {
|
---|
2597 | SetError(BAD_FINISHED_MSG, error, session, FATAL_ERROR_STATE);
|
---|
2598 | return ret;
|
---|
2599 | }
|
---|
2600 |
|
---|
2601 | if (ret == 0 && session->flags.cached == 0) {
|
---|
2602 | if (session->sslServer->options.haveSessionId) {
|
---|
2603 | WOLFSSL_SESSION* sess = GetSession(session->sslServer, NULL, 0);
|
---|
2604 | if (sess == NULL) {
|
---|
2605 | AddSession(session->sslServer); /* don't re add */
|
---|
2606 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
2607 | INC_STAT(SnifferStats.sslResumptionInserts);
|
---|
2608 | #endif
|
---|
2609 | }
|
---|
2610 | session->flags.cached = 1;
|
---|
2611 | }
|
---|
2612 | }
|
---|
2613 |
|
---|
2614 | /* If receiving a finished message from one side, free the resources
|
---|
2615 | * from the other side's tracker. */
|
---|
2616 | if (session->flags.side == WOLFSSL_SERVER_END)
|
---|
2617 | FreeHandshakeResources(session->sslClient);
|
---|
2618 | else
|
---|
2619 | FreeHandshakeResources(session->sslServer);
|
---|
2620 |
|
---|
2621 | return ret;
|
---|
2622 | }
|
---|
2623 |
|
---|
2624 |
|
---|
2625 | /* Process HandShake input */
|
---|
2626 | static int DoHandShake(const byte* input, int* sslBytes,
|
---|
2627 | SnifferSession* session, char* error)
|
---|
2628 | {
|
---|
2629 | byte type;
|
---|
2630 | int size;
|
---|
2631 | int ret = 0;
|
---|
2632 | int startBytes;
|
---|
2633 |
|
---|
2634 | if (*sslBytes < HANDSHAKE_HEADER_SZ) {
|
---|
2635 | SetError(HANDSHAKE_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
2636 | return -1;
|
---|
2637 | }
|
---|
2638 | type = input[0];
|
---|
2639 | size = (input[1] << 16) | (input[2] << 8) | input[3];
|
---|
2640 |
|
---|
2641 | input += HANDSHAKE_HEADER_SZ;
|
---|
2642 | *sslBytes -= HANDSHAKE_HEADER_SZ;
|
---|
2643 | startBytes = *sslBytes;
|
---|
2644 |
|
---|
2645 | if (*sslBytes < size) {
|
---|
2646 | Trace(SPLIT_HANDSHAKE_MSG_STR);
|
---|
2647 | *sslBytes = 0;
|
---|
2648 | return ret;
|
---|
2649 | }
|
---|
2650 |
|
---|
2651 | /* A session's arrays are released when the handshake is completed. */
|
---|
2652 | if (session->sslServer->arrays == NULL &&
|
---|
2653 | session->sslClient->arrays == NULL) {
|
---|
2654 |
|
---|
2655 | SetError(NO_SECURE_RENEGOTIATION, error, session, FATAL_ERROR_STATE);
|
---|
2656 | return -1;
|
---|
2657 | }
|
---|
2658 |
|
---|
2659 | #ifdef HAVE_EXTENDED_MASTER
|
---|
2660 | if (session->hash) {
|
---|
2661 | if (HashUpdate(session->hash, input, size) != 0) {
|
---|
2662 | SetError(EXTENDED_MASTER_HASH_STR, error,
|
---|
2663 | session, FATAL_ERROR_STATE);
|
---|
2664 | return -1;
|
---|
2665 | }
|
---|
2666 | }
|
---|
2667 | #endif
|
---|
2668 |
|
---|
2669 | switch (type) {
|
---|
2670 | case hello_verify_request:
|
---|
2671 | Trace(GOT_HELLO_VERIFY_STR);
|
---|
2672 | break;
|
---|
2673 | case hello_request:
|
---|
2674 | Trace(GOT_HELLO_REQUEST_STR);
|
---|
2675 | break;
|
---|
2676 | case session_ticket:
|
---|
2677 | Trace(GOT_SESSION_TICKET_STR);
|
---|
2678 | ret = ProcessSessionTicket(input, sslBytes, session, error);
|
---|
2679 | break;
|
---|
2680 | case server_hello:
|
---|
2681 | Trace(GOT_SERVER_HELLO_STR);
|
---|
2682 | ret = ProcessServerHello(size, input, sslBytes, session, error);
|
---|
2683 | break;
|
---|
2684 | case certificate_request:
|
---|
2685 | Trace(GOT_CERT_REQ_STR);
|
---|
2686 | break;
|
---|
2687 | case server_key_exchange:
|
---|
2688 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
2689 | INC_STAT(SnifferStats.sslEphemeralMisses);
|
---|
2690 | #endif
|
---|
2691 | Trace(GOT_SERVER_KEY_EX_STR);
|
---|
2692 | /* can't know temp key passively */
|
---|
2693 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE);
|
---|
2694 | ret = -1;
|
---|
2695 | break;
|
---|
2696 | case certificate:
|
---|
2697 | Trace(GOT_CERT_STR);
|
---|
2698 | if (session->flags.side == WOLFSSL_SERVER_END) {
|
---|
2699 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
2700 | INC_STAT(SnifferStats.sslClientAuthConns);
|
---|
2701 | #endif
|
---|
2702 | }
|
---|
2703 | #ifdef WOLFSSL_SNIFFER_WATCH
|
---|
2704 | ret = ProcessCertificate(input, sslBytes, session, error);
|
---|
2705 | #endif
|
---|
2706 | break;
|
---|
2707 | case server_hello_done:
|
---|
2708 | Trace(GOT_SERVER_HELLO_DONE_STR);
|
---|
2709 | break;
|
---|
2710 | case finished:
|
---|
2711 | Trace(GOT_FINISHED_STR);
|
---|
2712 | ret = ProcessFinished(input, size, sslBytes, session, error);
|
---|
2713 | break;
|
---|
2714 | case client_hello:
|
---|
2715 | Trace(GOT_CLIENT_HELLO_STR);
|
---|
2716 | ret = ProcessClientHello(input, sslBytes, session, error);
|
---|
2717 | break;
|
---|
2718 | case client_key_exchange:
|
---|
2719 | Trace(GOT_CLIENT_KEY_EX_STR);
|
---|
2720 | #ifdef HAVE_EXTENDED_MASTER
|
---|
2721 | if (session->flags.expectEms && session->hash != NULL) {
|
---|
2722 | if (HashCopy(session->sslServer->hsHashes,
|
---|
2723 | session->hash) == 0 &&
|
---|
2724 | HashCopy(session->sslClient->hsHashes,
|
---|
2725 | session->hash) == 0) {
|
---|
2726 |
|
---|
2727 | session->sslServer->options.haveEMS = 1;
|
---|
2728 | session->sslClient->options.haveEMS = 1;
|
---|
2729 | }
|
---|
2730 | else {
|
---|
2731 | SetError(EXTENDED_MASTER_HASH_STR, error,
|
---|
2732 | session, FATAL_ERROR_STATE);
|
---|
2733 | ret = -1;
|
---|
2734 | }
|
---|
2735 | XMEMSET(session->hash, 0, sizeof(HsHashes));
|
---|
2736 | XFREE(session->hash, NULL, DYNAMIC_TYPE_HASHES);
|
---|
2737 | session->hash = NULL;
|
---|
2738 | }
|
---|
2739 | else {
|
---|
2740 | session->sslServer->options.haveEMS = 0;
|
---|
2741 | session->sslClient->options.haveEMS = 0;
|
---|
2742 | }
|
---|
2743 | #endif
|
---|
2744 | if (ret == 0)
|
---|
2745 | ret = ProcessClientKeyExchange(input, sslBytes, session, error);
|
---|
2746 | break;
|
---|
2747 | case certificate_verify:
|
---|
2748 | Trace(GOT_CERT_VER_STR);
|
---|
2749 | break;
|
---|
2750 | case certificate_status:
|
---|
2751 | Trace(GOT_CERT_STATUS_STR);
|
---|
2752 | break;
|
---|
2753 | default:
|
---|
2754 | SetError(GOT_UNKNOWN_HANDSHAKE_STR, error, session, 0);
|
---|
2755 | return -1;
|
---|
2756 | }
|
---|
2757 |
|
---|
2758 | *sslBytes = startBytes - size; /* actual bytes of full process */
|
---|
2759 |
|
---|
2760 | return ret;
|
---|
2761 | }
|
---|
2762 |
|
---|
2763 |
|
---|
2764 | /* Decrypt input into plain output, 0 on success */
|
---|
2765 | static int Decrypt(SSL* ssl, byte* output, const byte* input, word32 sz)
|
---|
2766 | {
|
---|
2767 | int ret = 0;
|
---|
2768 |
|
---|
2769 | (void)output;
|
---|
2770 | (void)input;
|
---|
2771 | (void)sz;
|
---|
2772 |
|
---|
2773 | switch (ssl->specs.bulk_cipher_algorithm) {
|
---|
2774 | #ifdef BUILD_ARC4
|
---|
2775 | case wolfssl_rc4:
|
---|
2776 | wc_Arc4Process(ssl->decrypt.arc4, output, input, sz);
|
---|
2777 | break;
|
---|
2778 | #endif
|
---|
2779 |
|
---|
2780 | #ifdef BUILD_DES3
|
---|
2781 | case wolfssl_triple_des:
|
---|
2782 | ret = wc_Des3_CbcDecrypt(ssl->decrypt.des3, output, input, sz);
|
---|
2783 | break;
|
---|
2784 | #endif
|
---|
2785 |
|
---|
2786 | #ifdef BUILD_AES
|
---|
2787 | case wolfssl_aes:
|
---|
2788 | ret = wc_AesCbcDecrypt(ssl->decrypt.aes, output, input, sz);
|
---|
2789 | break;
|
---|
2790 | #endif
|
---|
2791 |
|
---|
2792 | #ifdef HAVE_HC128
|
---|
2793 | case wolfssl_hc128:
|
---|
2794 | wc_Hc128_Process(ssl->decrypt.hc128, output, input, sz);
|
---|
2795 | break;
|
---|
2796 | #endif
|
---|
2797 |
|
---|
2798 | #ifdef BUILD_RABBIT
|
---|
2799 | case wolfssl_rabbit:
|
---|
2800 | wc_RabbitProcess(ssl->decrypt.rabbit, output, input, sz);
|
---|
2801 | break;
|
---|
2802 | #endif
|
---|
2803 |
|
---|
2804 | #ifdef HAVE_CAMELLIA
|
---|
2805 | case wolfssl_camellia:
|
---|
2806 | wc_CamelliaCbcDecrypt(ssl->decrypt.cam, output, input, sz);
|
---|
2807 | break;
|
---|
2808 | #endif
|
---|
2809 |
|
---|
2810 | #ifdef HAVE_IDEA
|
---|
2811 | case wolfssl_idea:
|
---|
2812 | wc_IdeaCbcDecrypt(ssl->decrypt.idea, output, input, sz);
|
---|
2813 | break;
|
---|
2814 | #endif
|
---|
2815 |
|
---|
2816 | #ifdef HAVE_AESGCM
|
---|
2817 | case wolfssl_aes_gcm:
|
---|
2818 | if (sz >= (word32)(AESGCM_EXP_IV_SZ + ssl->specs.aead_mac_size))
|
---|
2819 | {
|
---|
2820 | /* scratch buffer, sniffer ignores auth tag*/
|
---|
2821 | byte authTag[WOLFSSL_MIN_AUTH_TAG_SZ];
|
---|
2822 |
|
---|
2823 | byte nonce[AESGCM_NONCE_SZ];
|
---|
2824 | XMEMCPY(nonce, ssl->keys.aead_dec_imp_IV, AESGCM_IMP_IV_SZ);
|
---|
2825 | XMEMCPY(nonce + AESGCM_IMP_IV_SZ, input, AESGCM_EXP_IV_SZ);
|
---|
2826 |
|
---|
2827 | if (wc_AesGcmEncrypt(ssl->decrypt.aes,
|
---|
2828 | output,
|
---|
2829 | input + AESGCM_EXP_IV_SZ,
|
---|
2830 | sz - AESGCM_EXP_IV_SZ - ssl->specs.aead_mac_size,
|
---|
2831 | nonce, AESGCM_NONCE_SZ,
|
---|
2832 | authTag, sizeof(authTag),
|
---|
2833 | NULL, 0) < 0) {
|
---|
2834 | Trace(BAD_DECRYPT);
|
---|
2835 | ret = -1;
|
---|
2836 | }
|
---|
2837 | ForceZero(nonce, AESGCM_NONCE_SZ);
|
---|
2838 | }
|
---|
2839 | else {
|
---|
2840 | Trace(BAD_DECRYPT_SIZE);
|
---|
2841 | ret = -1;
|
---|
2842 | }
|
---|
2843 | break;
|
---|
2844 | #endif
|
---|
2845 |
|
---|
2846 | #ifdef HAVE_NULL_CIPHER
|
---|
2847 | case wolfssl_cipher_null:
|
---|
2848 | XMEMCPY(output, input, sz);
|
---|
2849 | break;
|
---|
2850 | #endif
|
---|
2851 |
|
---|
2852 | default:
|
---|
2853 | Trace(BAD_DECRYPT_TYPE);
|
---|
2854 | ret = -1;
|
---|
2855 | break;
|
---|
2856 | }
|
---|
2857 |
|
---|
2858 | return ret;
|
---|
2859 | }
|
---|
2860 |
|
---|
2861 |
|
---|
2862 | /* Decrypt input message into output, adjust output steam if needed */
|
---|
2863 | static const byte* DecryptMessage(SSL* ssl, const byte* input, word32 sz,
|
---|
2864 | byte* output, int* error, int* advance)
|
---|
2865 | {
|
---|
2866 | int ivExtra = 0;
|
---|
2867 |
|
---|
2868 | int ret = Decrypt(ssl, output, input, sz);
|
---|
2869 | if (ret != 0) {
|
---|
2870 | *error = ret;
|
---|
2871 | return NULL;
|
---|
2872 | }
|
---|
2873 | ssl->keys.encryptSz = sz;
|
---|
2874 | if (ssl->options.tls1_1 && ssl->specs.cipher_type == block) {
|
---|
2875 | output += ssl->specs.block_size; /* go past TLSv1.1 IV */
|
---|
2876 | ivExtra = ssl->specs.block_size;
|
---|
2877 | *advance = ssl->specs.block_size;
|
---|
2878 | }
|
---|
2879 |
|
---|
2880 | if (ssl->specs.cipher_type == aead) {
|
---|
2881 | *advance = ssl->specs.aead_mac_size;
|
---|
2882 | ssl->keys.padSz = ssl->specs.aead_mac_size;
|
---|
2883 | }
|
---|
2884 | else
|
---|
2885 | ssl->keys.padSz = ssl->specs.hash_size;
|
---|
2886 |
|
---|
2887 | if (ssl->specs.cipher_type == block)
|
---|
2888 | ssl->keys.padSz += *(output + sz - ivExtra - 1) + 1;
|
---|
2889 |
|
---|
2890 | return output;
|
---|
2891 | }
|
---|
2892 |
|
---|
2893 |
|
---|
2894 | /* remove session from table, use rowHint if no info (means we have a lock) */
|
---|
2895 | static void RemoveSession(SnifferSession* session, IpInfo* ipInfo,
|
---|
2896 | TcpInfo* tcpInfo, word32 rowHint)
|
---|
2897 | {
|
---|
2898 | SnifferSession* previous = 0;
|
---|
2899 | SnifferSession* current;
|
---|
2900 | word32 row = rowHint;
|
---|
2901 | int haveLock = 0;
|
---|
2902 |
|
---|
2903 | if (ipInfo && tcpInfo)
|
---|
2904 | row = SessionHash(ipInfo, tcpInfo);
|
---|
2905 | else
|
---|
2906 | haveLock = 1;
|
---|
2907 |
|
---|
2908 | assert(row <= HASH_SIZE);
|
---|
2909 | Trace(REMOVE_SESSION_STR);
|
---|
2910 |
|
---|
2911 | if (!haveLock)
|
---|
2912 | wc_LockMutex(&SessionMutex);
|
---|
2913 |
|
---|
2914 | current = SessionTable[row];
|
---|
2915 |
|
---|
2916 | while (current) {
|
---|
2917 | if (current == session) {
|
---|
2918 | if (previous)
|
---|
2919 | previous->next = current->next;
|
---|
2920 | else
|
---|
2921 | SessionTable[row] = current->next;
|
---|
2922 | FreeSnifferSession(session);
|
---|
2923 | TraceRemovedSession();
|
---|
2924 | break;
|
---|
2925 | }
|
---|
2926 | previous = current;
|
---|
2927 | current = current->next;
|
---|
2928 | }
|
---|
2929 |
|
---|
2930 | if (!haveLock)
|
---|
2931 | wc_UnLockMutex(&SessionMutex);
|
---|
2932 | }
|
---|
2933 |
|
---|
2934 |
|
---|
2935 | /* Remove stale sessions from the Session Table, have a lock */
|
---|
2936 | static void RemoveStaleSessions(void)
|
---|
2937 | {
|
---|
2938 | word32 i;
|
---|
2939 | SnifferSession* session;
|
---|
2940 |
|
---|
2941 | for (i = 0; i < HASH_SIZE; i++) {
|
---|
2942 | session = SessionTable[i];
|
---|
2943 | while (session) {
|
---|
2944 | SnifferSession* next = session->next;
|
---|
2945 | if (time(NULL) >= session->lastUsed + WOLFSSL_SNIFFER_TIMEOUT) {
|
---|
2946 | TraceStaleSession();
|
---|
2947 | RemoveSession(session, NULL, NULL, i);
|
---|
2948 | }
|
---|
2949 | session = next;
|
---|
2950 | }
|
---|
2951 | }
|
---|
2952 | }
|
---|
2953 |
|
---|
2954 |
|
---|
2955 | /* Create a new Sniffer Session */
|
---|
2956 | static SnifferSession* CreateSession(IpInfo* ipInfo, TcpInfo* tcpInfo,
|
---|
2957 | char* error)
|
---|
2958 | {
|
---|
2959 | SnifferSession* session = 0;
|
---|
2960 | int row;
|
---|
2961 |
|
---|
2962 | Trace(NEW_SESSION_STR);
|
---|
2963 | /* create a new one */
|
---|
2964 | session = (SnifferSession*)XMALLOC(sizeof(SnifferSession),
|
---|
2965 | NULL, DYNAMIC_TYPE_SNIFFER_SESSION);
|
---|
2966 | if (session == NULL) {
|
---|
2967 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
2968 | return 0;
|
---|
2969 | }
|
---|
2970 | InitSession(session);
|
---|
2971 | #ifdef HAVE_EXTENDED_MASTER
|
---|
2972 | {
|
---|
2973 | HsHashes* newHash = (HsHashes*)XMALLOC(sizeof(HsHashes),
|
---|
2974 | NULL, DYNAMIC_TYPE_HASHES);
|
---|
2975 | if (newHash == NULL) {
|
---|
2976 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
2977 | XFREE(session, NULL, DYNAMIC_TYPE_SNIFFER_SESSION);
|
---|
2978 | return 0;
|
---|
2979 | }
|
---|
2980 | if (HashInit(newHash) != 0) {
|
---|
2981 | SetError(EXTENDED_MASTER_HASH_STR, error, NULL, 0);
|
---|
2982 | XFREE(session, NULL, DYNAMIC_TYPE_SNIFFER_SESSION);
|
---|
2983 | return 0;
|
---|
2984 | }
|
---|
2985 | session->hash = newHash;
|
---|
2986 | }
|
---|
2987 | #endif
|
---|
2988 | session->server = ipInfo->dst;
|
---|
2989 | session->client = ipInfo->src;
|
---|
2990 | session->srvPort = (word16)tcpInfo->dstPort;
|
---|
2991 | session->cliPort = (word16)tcpInfo->srcPort;
|
---|
2992 | session->cliSeqStart = tcpInfo->sequence;
|
---|
2993 | session->cliExpected = 1; /* relative */
|
---|
2994 | session->lastUsed= time(NULL);
|
---|
2995 | session->keySz = 0;
|
---|
2996 | #ifdef HAVE_SNI
|
---|
2997 | session->sni = NULL;
|
---|
2998 | #endif
|
---|
2999 |
|
---|
3000 | session->context = GetSnifferServer(ipInfo, tcpInfo);
|
---|
3001 | if (session->context == NULL) {
|
---|
3002 | SetError(SERVER_NOT_REG_STR, error, NULL, 0);
|
---|
3003 | XFREE(session, NULL, DYNAMIC_TYPE_SNIFFER_SESSION);
|
---|
3004 | return 0;
|
---|
3005 | }
|
---|
3006 |
|
---|
3007 | session->sslServer = SSL_new(session->context->ctx);
|
---|
3008 | if (session->sslServer == NULL) {
|
---|
3009 | SetError(BAD_NEW_SSL_STR, error, session, FATAL_ERROR_STATE);
|
---|
3010 | XFREE(session, NULL, DYNAMIC_TYPE_SNIFFER_SESSION);
|
---|
3011 | return 0;
|
---|
3012 | }
|
---|
3013 | session->sslClient = SSL_new(session->context->ctx);
|
---|
3014 | if (session->sslClient == NULL) {
|
---|
3015 | SSL_free(session->sslServer);
|
---|
3016 | session->sslServer = 0;
|
---|
3017 |
|
---|
3018 | SetError(BAD_NEW_SSL_STR, error, session, FATAL_ERROR_STATE);
|
---|
3019 | XFREE(session, NULL, DYNAMIC_TYPE_SNIFFER_SESSION);
|
---|
3020 | return 0;
|
---|
3021 | }
|
---|
3022 | /* put server back into server mode */
|
---|
3023 | session->sslServer->options.side = WOLFSSL_SERVER_END;
|
---|
3024 |
|
---|
3025 | row = SessionHash(ipInfo, tcpInfo);
|
---|
3026 |
|
---|
3027 | /* add it to the session table */
|
---|
3028 | wc_LockMutex(&SessionMutex);
|
---|
3029 |
|
---|
3030 | session->next = SessionTable[row];
|
---|
3031 | SessionTable[row] = session;
|
---|
3032 |
|
---|
3033 | SessionCount++;
|
---|
3034 |
|
---|
3035 | if ( (SessionCount % HASH_SIZE) == 0) {
|
---|
3036 | TraceFindingStale();
|
---|
3037 | RemoveStaleSessions();
|
---|
3038 | }
|
---|
3039 |
|
---|
3040 | wc_UnLockMutex(&SessionMutex);
|
---|
3041 |
|
---|
3042 | /* CreateSession is called in response to a SYN packet, we know this
|
---|
3043 | * is headed to the server. Also we know the server is one we care
|
---|
3044 | * about as we've passed the GetSnifferServer() successfully. */
|
---|
3045 | session->flags.side = WOLFSSL_SERVER_END;
|
---|
3046 |
|
---|
3047 | return session;
|
---|
3048 | }
|
---|
3049 |
|
---|
3050 |
|
---|
3051 | #ifdef OLD_HELLO_ALLOWED
|
---|
3052 |
|
---|
3053 | /* Process Old Client Hello Input */
|
---|
3054 | static int DoOldHello(SnifferSession* session, const byte* sslFrame,
|
---|
3055 | int* rhSize, int* sslBytes, char* error)
|
---|
3056 | {
|
---|
3057 | const byte* input = sslFrame;
|
---|
3058 | byte b0, b1;
|
---|
3059 | word32 idx = 0;
|
---|
3060 | int ret;
|
---|
3061 |
|
---|
3062 | Trace(GOT_OLD_CLIENT_HELLO_STR);
|
---|
3063 | session->flags.clientHello = 1; /* don't process again */
|
---|
3064 | b0 = *input++;
|
---|
3065 | b1 = *input++;
|
---|
3066 | *sslBytes -= 2;
|
---|
3067 | *rhSize = ((b0 & 0x7f) << 8) | b1;
|
---|
3068 |
|
---|
3069 | if (*rhSize > *sslBytes) {
|
---|
3070 | SetError(OLD_CLIENT_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
3071 | return -1;
|
---|
3072 | }
|
---|
3073 |
|
---|
3074 | ret = ProcessOldClientHello(session->sslServer, input, &idx, *sslBytes,
|
---|
3075 | (word16)*rhSize);
|
---|
3076 | if (ret < 0 && ret != MATCH_SUITE_ERROR) {
|
---|
3077 | SetError(BAD_OLD_CLIENT_STR, error, session, FATAL_ERROR_STATE);
|
---|
3078 | return -1;
|
---|
3079 | }
|
---|
3080 |
|
---|
3081 | Trace(OLD_CLIENT_OK_STR);
|
---|
3082 | XMEMCPY(session->sslClient->arrays->clientRandom,
|
---|
3083 | session->sslServer->arrays->clientRandom, RAN_LEN);
|
---|
3084 |
|
---|
3085 | *sslBytes -= *rhSize;
|
---|
3086 | return 0;
|
---|
3087 | }
|
---|
3088 |
|
---|
3089 | #endif /* OLD_HELLO_ALLOWED */
|
---|
3090 |
|
---|
3091 |
|
---|
3092 | #if 0
|
---|
3093 | /* Calculate the TCP checksum, see RFC 1071 */
|
---|
3094 | /* return 0 for success, -1 on error */
|
---|
3095 | /* can be called from decode() with
|
---|
3096 | TcpChecksum(&ipInfo, &tcpInfo, sslBytes, packet + ipInfo.length);
|
---|
3097 | could also add a 64bit version if type available and using this
|
---|
3098 | */
|
---|
3099 | int TcpChecksum(IpInfo* ipInfo, TcpInfo* tcpInfo, int dataLen,
|
---|
3100 | const byte* packet)
|
---|
3101 | {
|
---|
3102 | TcpPseudoHdr pseudo;
|
---|
3103 | int count = PSEUDO_HDR_SZ;
|
---|
3104 | const word16* data = (word16*)&pseudo;
|
---|
3105 | word32 sum = 0;
|
---|
3106 | word16 checksum;
|
---|
3107 |
|
---|
3108 | pseudo.src = ipInfo->src;
|
---|
3109 | pseudo.dst = ipInfo->dst;
|
---|
3110 | pseudo.rsv = 0;
|
---|
3111 | pseudo.protocol = TCP_PROTO;
|
---|
3112 | pseudo.length = htons(tcpInfo->length + dataLen);
|
---|
3113 |
|
---|
3114 | /* pseudo header sum */
|
---|
3115 | while (count >= 2) {
|
---|
3116 | sum += *data++;
|
---|
3117 | count -= 2;
|
---|
3118 | }
|
---|
3119 |
|
---|
3120 | count = tcpInfo->length + dataLen;
|
---|
3121 | data = (word16*)packet;
|
---|
3122 |
|
---|
3123 | /* main sum */
|
---|
3124 | while (count > 1) {
|
---|
3125 | sum += *data++;
|
---|
3126 | count -=2;
|
---|
3127 | }
|
---|
3128 |
|
---|
3129 | /* get left-over, if any */
|
---|
3130 | packet = (byte*)data;
|
---|
3131 | if (count > 0) {
|
---|
3132 | sum += *packet;
|
---|
3133 | }
|
---|
3134 |
|
---|
3135 | /* fold 32bit sum into 16 bits */
|
---|
3136 | while (sum >> 16)
|
---|
3137 | sum = (sum & 0xffff) + (sum >> 16);
|
---|
3138 |
|
---|
3139 | checksum = (word16)~sum;
|
---|
3140 | /* checksum should now equal 0, since included already calcd checksum */
|
---|
3141 | /* field, but tcp checksum offloading could negate calculation */
|
---|
3142 | if (checksum == 0)
|
---|
3143 | return 0;
|
---|
3144 | return -1;
|
---|
3145 | }
|
---|
3146 | #endif
|
---|
3147 |
|
---|
3148 |
|
---|
3149 | /* Check IP and TCP headers, set payload */
|
---|
3150 | /* returns 0 on success, -1 on error */
|
---|
3151 | static int CheckHeaders(IpInfo* ipInfo, TcpInfo* tcpInfo, const byte* packet,
|
---|
3152 | int length, const byte** sslFrame, int* sslBytes, char* error)
|
---|
3153 | {
|
---|
3154 | TraceHeader();
|
---|
3155 | TracePacket();
|
---|
3156 |
|
---|
3157 | /* ip header */
|
---|
3158 | if (length < IP_HDR_SZ) {
|
---|
3159 | SetError(PACKET_HDR_SHORT_STR, error, NULL, 0);
|
---|
3160 | return -1;
|
---|
3161 | }
|
---|
3162 | if (CheckIpHdr((IpHdr*)packet, ipInfo, length, error) != 0)
|
---|
3163 | return -1;
|
---|
3164 |
|
---|
3165 | /* tcp header */
|
---|
3166 | if (length < (ipInfo->length + TCP_HDR_SZ)) {
|
---|
3167 | SetError(PACKET_HDR_SHORT_STR, error, NULL, 0);
|
---|
3168 | return -1;
|
---|
3169 | }
|
---|
3170 | if (CheckTcpHdr((TcpHdr*)(packet + ipInfo->length), tcpInfo, error) != 0)
|
---|
3171 | return -1;
|
---|
3172 |
|
---|
3173 | /* setup */
|
---|
3174 | *sslFrame = packet + ipInfo->length + tcpInfo->length;
|
---|
3175 | if (*sslFrame > packet + length) {
|
---|
3176 | SetError(PACKET_HDR_SHORT_STR, error, NULL, 0);
|
---|
3177 | return -1;
|
---|
3178 | }
|
---|
3179 | /* We only care about the data in the TCP/IP record. There may be extra
|
---|
3180 | * data after the IP record for the FCS for Ethernet. */
|
---|
3181 | *sslBytes = (int)(packet + ipInfo->total - *sslFrame);
|
---|
3182 |
|
---|
3183 | return 0;
|
---|
3184 | }
|
---|
3185 |
|
---|
3186 |
|
---|
3187 | /* Create or Find existing session */
|
---|
3188 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */
|
---|
3189 | static int CheckSession(IpInfo* ipInfo, TcpInfo* tcpInfo, int sslBytes,
|
---|
3190 | SnifferSession** session, char* error)
|
---|
3191 | {
|
---|
3192 | /* create a new SnifferSession on client SYN */
|
---|
3193 | if (tcpInfo->syn && !tcpInfo->ack) {
|
---|
3194 | TraceClientSyn(tcpInfo->sequence);
|
---|
3195 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
3196 | INC_STAT(SnifferStats.sslEncryptedConns);
|
---|
3197 | #endif
|
---|
3198 | *session = CreateSession(ipInfo, tcpInfo, error);
|
---|
3199 | if (*session == NULL) {
|
---|
3200 | *session = GetSnifferSession(ipInfo, tcpInfo);
|
---|
3201 | /* already had existing, so OK */
|
---|
3202 | if (*session)
|
---|
3203 | return 1;
|
---|
3204 |
|
---|
3205 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
3206 | return -1;
|
---|
3207 | }
|
---|
3208 | return 1;
|
---|
3209 | }
|
---|
3210 | /* get existing sniffer session */
|
---|
3211 | else {
|
---|
3212 | *session = GetSnifferSession(ipInfo, tcpInfo);
|
---|
3213 | if (*session == NULL) {
|
---|
3214 | /* don't worry about extraneous RST or duplicate FINs */
|
---|
3215 | if (tcpInfo->fin || tcpInfo->rst)
|
---|
3216 | return 1;
|
---|
3217 | /* don't worry about duplicate ACKs either */
|
---|
3218 | if (sslBytes == 0 && tcpInfo->ack)
|
---|
3219 | return 1;
|
---|
3220 |
|
---|
3221 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
3222 | LOCK_STAT();
|
---|
3223 | NOLOCK_INC_STAT(SnifferStats.sslDecryptedPackets);
|
---|
3224 | NOLOCK_ADD_TO_STAT(SnifferStats.sslDecryptedBytes, sslBytes);
|
---|
3225 | UNLOCK_STAT();
|
---|
3226 | #endif
|
---|
3227 |
|
---|
3228 | SetError(BAD_SESSION_STR, error, NULL, 0);
|
---|
3229 | return -1;
|
---|
3230 | }
|
---|
3231 | }
|
---|
3232 | return 0;
|
---|
3233 | }
|
---|
3234 |
|
---|
3235 |
|
---|
3236 | /* Create a Packet Buffer from *begin - end, adjust new *begin and bytesLeft */
|
---|
3237 | static PacketBuffer* CreateBuffer(word32* begin, word32 end, const byte* data,
|
---|
3238 | int* bytesLeft)
|
---|
3239 | {
|
---|
3240 | PacketBuffer* pb;
|
---|
3241 |
|
---|
3242 | int added = end - *begin + 1;
|
---|
3243 | assert(*begin <= end);
|
---|
3244 |
|
---|
3245 | pb = (PacketBuffer*)XMALLOC(sizeof(PacketBuffer),
|
---|
3246 | NULL, DYNAMIC_TYPE_SNIFFER_PB);
|
---|
3247 | if (pb == NULL) return NULL;
|
---|
3248 |
|
---|
3249 | pb->next = 0;
|
---|
3250 | pb->begin = *begin;
|
---|
3251 | pb->end = end;
|
---|
3252 | pb->data = (byte*)XMALLOC(added, NULL, DYNAMIC_TYPE_SNIFFER_PB_BUFFER);
|
---|
3253 |
|
---|
3254 | if (pb->data == NULL) {
|
---|
3255 | XFREE(pb, NULL, DYNAMIC_TYPE_SNIFFER_PB);
|
---|
3256 | return NULL;
|
---|
3257 | }
|
---|
3258 | XMEMCPY(pb->data, data, added);
|
---|
3259 |
|
---|
3260 | *bytesLeft -= added;
|
---|
3261 | *begin = pb->end + 1;
|
---|
3262 |
|
---|
3263 | return pb;
|
---|
3264 | }
|
---|
3265 |
|
---|
3266 |
|
---|
3267 | /* Add sslFrame to Reassembly List */
|
---|
3268 | /* returns 1 (end) on success, -1, on error */
|
---|
3269 | static int AddToReassembly(byte from, word32 seq, const byte* sslFrame,
|
---|
3270 | int sslBytes, SnifferSession* session, char* error)
|
---|
3271 | {
|
---|
3272 | PacketBuffer* add;
|
---|
3273 | PacketBuffer** front = (from == WOLFSSL_SERVER_END) ?
|
---|
3274 | &session->cliReassemblyList: &session->srvReassemblyList;
|
---|
3275 | PacketBuffer* curr = *front;
|
---|
3276 | PacketBuffer* prev = curr;
|
---|
3277 |
|
---|
3278 | word32* reassemblyMemory = (from == WOLFSSL_SERVER_END) ?
|
---|
3279 | &session->cliReassemblyMemory : &session->srvReassemblyMemory;
|
---|
3280 | word32 startSeq = seq;
|
---|
3281 | word32 added;
|
---|
3282 | int bytesLeft = sslBytes; /* could be overlapping fragment */
|
---|
3283 |
|
---|
3284 | /* if list is empty add full frame to front */
|
---|
3285 | if (!curr) {
|
---|
3286 | if (MaxRecoveryMemory != -1 &&
|
---|
3287 | (int)(*reassemblyMemory + sslBytes) > MaxRecoveryMemory) {
|
---|
3288 | SetError(REASSEMBLY_MAX_STR, error, session, FATAL_ERROR_STATE);
|
---|
3289 | return -1;
|
---|
3290 | }
|
---|
3291 | add = CreateBuffer(&seq, seq + sslBytes - 1, sslFrame, &bytesLeft);
|
---|
3292 | if (add == NULL) {
|
---|
3293 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
3294 | return -1;
|
---|
3295 | }
|
---|
3296 | *front = add;
|
---|
3297 | *reassemblyMemory += sslBytes;
|
---|
3298 | return 1;
|
---|
3299 | }
|
---|
3300 |
|
---|
3301 | /* add to front if before current front, up to next->begin */
|
---|
3302 | if (seq < curr->begin) {
|
---|
3303 | word32 end = seq + sslBytes - 1;
|
---|
3304 |
|
---|
3305 | if (end >= curr->begin)
|
---|
3306 | end = curr->begin - 1;
|
---|
3307 |
|
---|
3308 | if (MaxRecoveryMemory -1 &&
|
---|
3309 | (int)(*reassemblyMemory + sslBytes) > MaxRecoveryMemory) {
|
---|
3310 | SetError(REASSEMBLY_MAX_STR, error, session, FATAL_ERROR_STATE);
|
---|
3311 | return -1;
|
---|
3312 | }
|
---|
3313 | add = CreateBuffer(&seq, end, sslFrame, &bytesLeft);
|
---|
3314 | if (add == NULL) {
|
---|
3315 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
3316 | return -1;
|
---|
3317 | }
|
---|
3318 | add->next = curr;
|
---|
3319 | *front = add;
|
---|
3320 | *reassemblyMemory += sslBytes;
|
---|
3321 | }
|
---|
3322 |
|
---|
3323 | /* while we have bytes left, try to find a gap to fill */
|
---|
3324 | while (bytesLeft > 0) {
|
---|
3325 | /* get previous packet in list */
|
---|
3326 | while (curr && (seq >= curr->begin)) {
|
---|
3327 | prev = curr;
|
---|
3328 | curr = curr->next;
|
---|
3329 | }
|
---|
3330 |
|
---|
3331 | /* don't add duplicate data */
|
---|
3332 | if (prev->end >= seq) {
|
---|
3333 | if ( (seq + bytesLeft - 1) <= prev->end)
|
---|
3334 | return 1;
|
---|
3335 | seq = prev->end + 1;
|
---|
3336 | bytesLeft = startSeq + sslBytes - seq;
|
---|
3337 | }
|
---|
3338 |
|
---|
3339 | if (!curr)
|
---|
3340 | /* we're at the end */
|
---|
3341 | added = bytesLeft;
|
---|
3342 | else
|
---|
3343 | /* we're in between two frames */
|
---|
3344 | added = min((word32)bytesLeft, curr->begin - seq);
|
---|
3345 |
|
---|
3346 | /* data already there */
|
---|
3347 | if (added == 0)
|
---|
3348 | continue;
|
---|
3349 |
|
---|
3350 | if (MaxRecoveryMemory != -1 &&
|
---|
3351 | (int)(*reassemblyMemory + added) > MaxRecoveryMemory) {
|
---|
3352 | SetError(REASSEMBLY_MAX_STR, error, session, FATAL_ERROR_STATE);
|
---|
3353 | return -1;
|
---|
3354 | }
|
---|
3355 | add = CreateBuffer(&seq, seq + added - 1, &sslFrame[seq - startSeq],
|
---|
3356 | &bytesLeft);
|
---|
3357 | if (add == NULL) {
|
---|
3358 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
3359 | return -1;
|
---|
3360 | }
|
---|
3361 | add->next = prev->next;
|
---|
3362 | prev->next = add;
|
---|
3363 | *reassemblyMemory += added;
|
---|
3364 | }
|
---|
3365 | return 1;
|
---|
3366 | }
|
---|
3367 |
|
---|
3368 |
|
---|
3369 | /* Add out of order FIN capture */
|
---|
3370 | /* returns 1 for success (end) */
|
---|
3371 | static int AddFinCapture(SnifferSession* session, word32 sequence)
|
---|
3372 | {
|
---|
3373 | if (session->flags.side == WOLFSSL_SERVER_END) {
|
---|
3374 | if (session->finCaputre.cliCounted == 0)
|
---|
3375 | session->finCaputre.cliFinSeq = sequence;
|
---|
3376 | }
|
---|
3377 | else {
|
---|
3378 | if (session->finCaputre.srvCounted == 0)
|
---|
3379 | session->finCaputre.srvFinSeq = sequence;
|
---|
3380 | }
|
---|
3381 | return 1;
|
---|
3382 | }
|
---|
3383 |
|
---|
3384 |
|
---|
3385 | /* Adjust incoming sequence based on side */
|
---|
3386 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */
|
---|
3387 | static int AdjustSequence(TcpInfo* tcpInfo, SnifferSession* session,
|
---|
3388 | int* sslBytes, const byte** sslFrame, char* error)
|
---|
3389 | {
|
---|
3390 | word32 seqStart = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3391 | session->cliSeqStart :session->srvSeqStart;
|
---|
3392 | word32 real = tcpInfo->sequence - seqStart;
|
---|
3393 | word32* expected = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3394 | &session->cliExpected : &session->srvExpected;
|
---|
3395 | PacketBuffer* reassemblyList = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3396 | session->cliReassemblyList : session->srvReassemblyList;
|
---|
3397 | byte skipPartial = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3398 | session->flags.srvSkipPartial :
|
---|
3399 | session->flags.cliSkipPartial;
|
---|
3400 |
|
---|
3401 | /* handle rollover of sequence */
|
---|
3402 | if (tcpInfo->sequence < seqStart)
|
---|
3403 | real = 0xffffffffU - seqStart + tcpInfo->sequence;
|
---|
3404 |
|
---|
3405 | TraceRelativeSequence(*expected, real);
|
---|
3406 |
|
---|
3407 | if (real < *expected) {
|
---|
3408 | Trace(DUPLICATE_STR);
|
---|
3409 | if (real + *sslBytes > *expected) {
|
---|
3410 | int overlap = *expected - real;
|
---|
3411 | Trace(OVERLAP_DUPLICATE_STR);
|
---|
3412 |
|
---|
3413 | /* adjust to expected, remove duplicate */
|
---|
3414 | *sslFrame += overlap;
|
---|
3415 | *sslBytes -= overlap;
|
---|
3416 |
|
---|
3417 | /* The following conditional block is duplicated below. It is the
|
---|
3418 | * same action but for a different setup case. If changing this
|
---|
3419 | * block be sure to also update the block below. */
|
---|
3420 | if (reassemblyList) {
|
---|
3421 | word32 newEnd = *expected + *sslBytes;
|
---|
3422 |
|
---|
3423 | if (newEnd > reassemblyList->begin) {
|
---|
3424 | Trace(OVERLAP_REASSEMBLY_BEGIN_STR);
|
---|
3425 |
|
---|
3426 | /* remove bytes already on reassembly list */
|
---|
3427 | *sslBytes -= newEnd - reassemblyList->begin;
|
---|
3428 | }
|
---|
3429 | if (newEnd > reassemblyList->end) {
|
---|
3430 | Trace(OVERLAP_REASSEMBLY_END_STR);
|
---|
3431 |
|
---|
3432 | /* may be past reassembly list end (could have more on list)
|
---|
3433 | so try to add what's past the front->end */
|
---|
3434 | AddToReassembly(session->flags.side, reassemblyList->end +1,
|
---|
3435 | *sslFrame + reassemblyList->end - *expected + 1,
|
---|
3436 | newEnd - reassemblyList->end, session, error);
|
---|
3437 | }
|
---|
3438 | }
|
---|
3439 | }
|
---|
3440 | else
|
---|
3441 | return 1;
|
---|
3442 | }
|
---|
3443 | else if (real > *expected) {
|
---|
3444 | Trace(OUT_OF_ORDER_STR);
|
---|
3445 | if (*sslBytes > 0) {
|
---|
3446 | int addResult = AddToReassembly(session->flags.side, real,
|
---|
3447 | *sslFrame, *sslBytes, session, error);
|
---|
3448 | if (skipPartial) {
|
---|
3449 | *sslBytes = 0;
|
---|
3450 | return 0;
|
---|
3451 | }
|
---|
3452 | else
|
---|
3453 | return addResult;
|
---|
3454 | }
|
---|
3455 | else if (tcpInfo->fin)
|
---|
3456 | return AddFinCapture(session, real);
|
---|
3457 | }
|
---|
3458 | else if (*sslBytes > 0) {
|
---|
3459 | if (skipPartial) {
|
---|
3460 | AddToReassembly(session->flags.side, real,
|
---|
3461 | *sslFrame, *sslBytes, session, error);
|
---|
3462 | *expected += *sslBytes;
|
---|
3463 | *sslBytes = 0;
|
---|
3464 | if (tcpInfo->fin)
|
---|
3465 | *expected += 1;
|
---|
3466 | return 0;
|
---|
3467 | }
|
---|
3468 | /* The following conditional block is duplicated above. It is the
|
---|
3469 | * same action but for a different setup case. If changing this
|
---|
3470 | * block be sure to also update the block above. */
|
---|
3471 | else if (reassemblyList) {
|
---|
3472 | word32 newEnd = *expected + *sslBytes;
|
---|
3473 |
|
---|
3474 | if (newEnd > reassemblyList->begin) {
|
---|
3475 | Trace(OVERLAP_REASSEMBLY_BEGIN_STR);
|
---|
3476 |
|
---|
3477 | /* remove bytes already on reassembly list */
|
---|
3478 | *sslBytes -= newEnd - reassemblyList->begin;
|
---|
3479 | }
|
---|
3480 | if (newEnd > reassemblyList->end) {
|
---|
3481 | Trace(OVERLAP_REASSEMBLY_END_STR);
|
---|
3482 |
|
---|
3483 | /* may be past reassembly list end (could have more on list)
|
---|
3484 | so try to add what's past the front->end */
|
---|
3485 | AddToReassembly(session->flags.side, reassemblyList->end +1,
|
---|
3486 | *sslFrame + reassemblyList->end - *expected + 1,
|
---|
3487 | newEnd - reassemblyList->end, session, error);
|
---|
3488 | }
|
---|
3489 | }
|
---|
3490 | }
|
---|
3491 | /* got expected sequence */
|
---|
3492 | *expected += *sslBytes;
|
---|
3493 | if (tcpInfo->fin)
|
---|
3494 | *expected += 1;
|
---|
3495 |
|
---|
3496 | return 0;
|
---|
3497 | }
|
---|
3498 |
|
---|
3499 |
|
---|
3500 | static int FindNextRecordInAssembly(SnifferSession* session,
|
---|
3501 | const byte** sslFrame, int* sslBytes,
|
---|
3502 | const byte** end, char* error)
|
---|
3503 | {
|
---|
3504 | PacketBuffer** front = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3505 | &session->cliReassemblyList :
|
---|
3506 | &session->srvReassemblyList;
|
---|
3507 | PacketBuffer* curr = *front;
|
---|
3508 | PacketBuffer* prev = NULL;
|
---|
3509 | byte* skipPartial = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3510 | &session->flags.srvSkipPartial :
|
---|
3511 | &session->flags.cliSkipPartial;
|
---|
3512 | word32* reassemblyMemory = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3513 | &session->cliReassemblyMemory :
|
---|
3514 | &session->srvReassemblyMemory;
|
---|
3515 | SSL* ssl = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3516 | session->sslServer :
|
---|
3517 | session->sslClient;
|
---|
3518 | ProtocolVersion pv = ssl->version;
|
---|
3519 | word32* expected = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3520 | &session->cliExpected :
|
---|
3521 | &session->srvExpected;
|
---|
3522 |
|
---|
3523 | while (curr != NULL) {
|
---|
3524 | *expected = curr->end + 1;
|
---|
3525 |
|
---|
3526 | if (curr->data[0] == application_data &&
|
---|
3527 | curr->data[1] == pv.major &&
|
---|
3528 | curr->data[2] == pv.minor) {
|
---|
3529 |
|
---|
3530 | if (ssl->buffers.inputBuffer.length > 0)
|
---|
3531 | Trace(DROPPING_PARTIAL_RECORD);
|
---|
3532 |
|
---|
3533 | *sslBytes = curr->end - curr->begin + 1;
|
---|
3534 | if ( (word32)*sslBytes > ssl->buffers.inputBuffer.bufferSize) {
|
---|
3535 | if (GrowInputBuffer(ssl, *sslBytes, 0) < 0) {
|
---|
3536 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
3537 | return -1;
|
---|
3538 | }
|
---|
3539 | }
|
---|
3540 |
|
---|
3541 | XMEMCPY(ssl->buffers.inputBuffer.buffer, curr->data, *sslBytes);
|
---|
3542 |
|
---|
3543 | *front = curr->next;
|
---|
3544 | *reassemblyMemory -= *sslBytes;
|
---|
3545 | FreePacketBuffer(curr);
|
---|
3546 |
|
---|
3547 | ssl->buffers.inputBuffer.length = *sslBytes;
|
---|
3548 | *sslFrame = ssl->buffers.inputBuffer.buffer;
|
---|
3549 | *end = *sslFrame + *sslBytes;
|
---|
3550 | *skipPartial = 0;
|
---|
3551 |
|
---|
3552 | return 0;
|
---|
3553 | }
|
---|
3554 | else if (ssl->specs.cipher_type == block) {
|
---|
3555 | if (ssl->specs.bulk_cipher_algorithm == wolfssl_aes) {
|
---|
3556 | #ifdef BUILD_AES
|
---|
3557 | wc_AesSetIV(ssl->decrypt.aes,
|
---|
3558 | curr->data + curr->end - curr->begin
|
---|
3559 | - ssl->specs.block_size + 1);
|
---|
3560 | #endif
|
---|
3561 | }
|
---|
3562 | else if (ssl->specs.bulk_cipher_algorithm == wolfssl_triple_des) {
|
---|
3563 | #ifdef BUILD_DES3
|
---|
3564 | wc_Des3_SetIV(ssl->decrypt.des3,
|
---|
3565 | curr->data + curr->end - curr->begin
|
---|
3566 | - ssl->specs.block_size + 1);
|
---|
3567 | #endif
|
---|
3568 | }
|
---|
3569 | }
|
---|
3570 |
|
---|
3571 | Trace(DROPPING_LOST_FRAG_STR);
|
---|
3572 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
3573 | INC_STAT(SnifferStats.sslDecodeFails);
|
---|
3574 | #endif
|
---|
3575 | prev = curr;
|
---|
3576 | curr = curr->next;
|
---|
3577 | *reassemblyMemory -= (prev->end - prev->begin + 1);
|
---|
3578 | FreePacketBuffer(prev);
|
---|
3579 | }
|
---|
3580 |
|
---|
3581 | *front = curr;
|
---|
3582 |
|
---|
3583 | return 0;
|
---|
3584 | }
|
---|
3585 |
|
---|
3586 |
|
---|
3587 | static int FixSequence(TcpInfo* tcpInfo, SnifferSession* session)
|
---|
3588 | {
|
---|
3589 | word32* expected = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3590 | &session->srvExpected : &session->cliExpected;
|
---|
3591 | PacketBuffer* list = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3592 | session->srvReassemblyList :
|
---|
3593 | session->cliReassemblyList;
|
---|
3594 | byte* skipPartial = (session->flags.side != WOLFSSL_SERVER_END) ?
|
---|
3595 | &session->flags.srvSkipPartial :
|
---|
3596 | &session->flags.cliSkipPartial;
|
---|
3597 |
|
---|
3598 | *skipPartial = 1;
|
---|
3599 | if (list != NULL)
|
---|
3600 | *expected = list->begin;
|
---|
3601 | else {
|
---|
3602 | word32 seqStart = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3603 | session->srvSeqStart : session->cliSeqStart;
|
---|
3604 | word32 real = tcpInfo->ackNumber - seqStart;
|
---|
3605 |
|
---|
3606 | *expected = real;
|
---|
3607 | }
|
---|
3608 |
|
---|
3609 | return 1;
|
---|
3610 | }
|
---|
3611 |
|
---|
3612 |
|
---|
3613 | /* Check latest ack number for missing packets
|
---|
3614 | return 0 ok, <0 on error */
|
---|
3615 | static int CheckAck(TcpInfo* tcpInfo, SnifferSession* session)
|
---|
3616 | {
|
---|
3617 | if (tcpInfo->ack) {
|
---|
3618 | word32 seqStart = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3619 | session->srvSeqStart :session->cliSeqStart;
|
---|
3620 | word32 real = tcpInfo->ackNumber - seqStart;
|
---|
3621 | word32 expected = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3622 | session->srvExpected : session->cliExpected;
|
---|
3623 |
|
---|
3624 | /* handle rollover of sequence */
|
---|
3625 | if (tcpInfo->ackNumber < seqStart)
|
---|
3626 | real = 0xffffffffU - seqStart + tcpInfo->ackNumber;
|
---|
3627 |
|
---|
3628 | TraceAck(real, expected);
|
---|
3629 |
|
---|
3630 | if (real > expected)
|
---|
3631 | return -1; /* we missed a packet, ACKing data we never saw */
|
---|
3632 | }
|
---|
3633 | return 0;
|
---|
3634 | }
|
---|
3635 |
|
---|
3636 |
|
---|
3637 | /* Check TCP Sequence status */
|
---|
3638 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */
|
---|
3639 | static int CheckSequence(IpInfo* ipInfo, TcpInfo* tcpInfo,
|
---|
3640 | SnifferSession* session, int* sslBytes,
|
---|
3641 | const byte** sslFrame, char* error)
|
---|
3642 | {
|
---|
3643 | int actualLen;
|
---|
3644 | byte* ackFault = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3645 | &session->flags.cliAckFault :
|
---|
3646 | &session->flags.srvAckFault;
|
---|
3647 |
|
---|
3648 | /* init SEQ from server to client */
|
---|
3649 | if (tcpInfo->syn && tcpInfo->ack) {
|
---|
3650 | session->srvSeqStart = tcpInfo->sequence;
|
---|
3651 | session->srvExpected = 1;
|
---|
3652 | TraceServerSyn(tcpInfo->sequence);
|
---|
3653 | return 1;
|
---|
3654 | }
|
---|
3655 |
|
---|
3656 | /* adjust potential ethernet trailer */
|
---|
3657 | actualLen = ipInfo->total - ipInfo->length - tcpInfo->length;
|
---|
3658 | if (*sslBytes > actualLen) {
|
---|
3659 | *sslBytes = actualLen;
|
---|
3660 | }
|
---|
3661 |
|
---|
3662 | TraceSequence(tcpInfo->sequence, *sslBytes);
|
---|
3663 | if (CheckAck(tcpInfo, session) < 0) {
|
---|
3664 | if (!RecoveryEnabled) {
|
---|
3665 | UpdateMissedDataSessions();
|
---|
3666 | SetError(ACK_MISSED_STR, error, session, FATAL_ERROR_STATE);
|
---|
3667 | return -1;
|
---|
3668 | }
|
---|
3669 | else {
|
---|
3670 | SetError(ACK_MISSED_STR, error, session, 0);
|
---|
3671 | if (*ackFault == 0) {
|
---|
3672 | *ackFault = 1;
|
---|
3673 | UpdateMissedDataSessions();
|
---|
3674 | }
|
---|
3675 | return FixSequence(tcpInfo, session);
|
---|
3676 | }
|
---|
3677 | }
|
---|
3678 |
|
---|
3679 | if (*ackFault) {
|
---|
3680 | Trace(CLEAR_ACK_FAULT);
|
---|
3681 | *ackFault = 0;
|
---|
3682 | }
|
---|
3683 |
|
---|
3684 | return AdjustSequence(tcpInfo, session, sslBytes, sslFrame, error);
|
---|
3685 | }
|
---|
3686 |
|
---|
3687 |
|
---|
3688 | /* Check Status before record processing */
|
---|
3689 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */
|
---|
3690 | static int CheckPreRecord(IpInfo* ipInfo, TcpInfo* tcpInfo,
|
---|
3691 | const byte** sslFrame, SnifferSession** session,
|
---|
3692 | int* sslBytes, const byte** end,
|
---|
3693 | void* vChain, word32 chainSz, char* error)
|
---|
3694 | {
|
---|
3695 | word32 length;
|
---|
3696 | SSL* ssl = ((*session)->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3697 | (*session)->sslServer : (*session)->sslClient;
|
---|
3698 | byte skipPartial = ((*session)->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3699 | (*session)->flags.srvSkipPartial :
|
---|
3700 | (*session)->flags.cliSkipPartial;
|
---|
3701 | /* remove SnifferSession on 2nd FIN or RST */
|
---|
3702 | if (tcpInfo->fin || tcpInfo->rst) {
|
---|
3703 | /* flag FIN and RST */
|
---|
3704 | if (tcpInfo->fin)
|
---|
3705 | (*session)->flags.finCount += 1;
|
---|
3706 | else if (tcpInfo->rst)
|
---|
3707 | (*session)->flags.finCount += 2;
|
---|
3708 |
|
---|
3709 | if ((*session)->flags.finCount >= 2) {
|
---|
3710 | RemoveSession(*session, ipInfo, tcpInfo, 0);
|
---|
3711 | *session = NULL;
|
---|
3712 | return 1;
|
---|
3713 | }
|
---|
3714 | }
|
---|
3715 |
|
---|
3716 | if ((*session)->flags.fatalError == FATAL_ERROR_STATE) {
|
---|
3717 | SetError(FATAL_ERROR_STR, error, NULL, 0);
|
---|
3718 | return -1;
|
---|
3719 | }
|
---|
3720 |
|
---|
3721 | if (skipPartial) {
|
---|
3722 | if (FindNextRecordInAssembly(*session,
|
---|
3723 | sslFrame, sslBytes, end, error) < 0) {
|
---|
3724 | return -1;
|
---|
3725 | }
|
---|
3726 | }
|
---|
3727 |
|
---|
3728 | if (*sslBytes == 0) {
|
---|
3729 | Trace(NO_DATA_STR);
|
---|
3730 | return 1;
|
---|
3731 | }
|
---|
3732 |
|
---|
3733 | /* if current partial data, add to end of partial */
|
---|
3734 | /* if skipping, the data is already at the end of partial */
|
---|
3735 | if ( !skipPartial && (length = ssl->buffers.inputBuffer.length) ) {
|
---|
3736 | Trace(PARTIAL_ADD_STR);
|
---|
3737 |
|
---|
3738 | if ( (*sslBytes + length) > ssl->buffers.inputBuffer.bufferSize) {
|
---|
3739 | if (GrowInputBuffer(ssl, *sslBytes, length) < 0) {
|
---|
3740 | SetError(MEMORY_STR, error, *session, FATAL_ERROR_STATE);
|
---|
3741 | return -1;
|
---|
3742 | }
|
---|
3743 | }
|
---|
3744 | if (vChain == NULL) {
|
---|
3745 | XMEMCPY(&ssl->buffers.inputBuffer.buffer[length],
|
---|
3746 | *sslFrame, *sslBytes);
|
---|
3747 | *sslBytes += length;
|
---|
3748 | ssl->buffers.inputBuffer.length = *sslBytes;
|
---|
3749 | *sslFrame = ssl->buffers.inputBuffer.buffer;
|
---|
3750 | *end = *sslFrame + *sslBytes;
|
---|
3751 | }
|
---|
3752 | }
|
---|
3753 |
|
---|
3754 | if (vChain != NULL) {
|
---|
3755 | #ifdef WOLFSSL_SNIFFER_CHAIN_INPUT
|
---|
3756 | struct iovec* chain = (struct iovec*)vChain;
|
---|
3757 | word32 i, offset, headerSz, qty, remainder;
|
---|
3758 |
|
---|
3759 | Trace(CHAIN_INPUT_STR);
|
---|
3760 | headerSz = (word32)*sslFrame - (word32)chain[0].iov_base;
|
---|
3761 | remainder = *sslBytes;
|
---|
3762 |
|
---|
3763 | if ( (*sslBytes + length) > ssl->buffers.inputBuffer.bufferSize) {
|
---|
3764 | if (GrowInputBuffer(ssl, *sslBytes, length) < 0) {
|
---|
3765 | SetError(MEMORY_STR, error, *session, FATAL_ERROR_STATE);
|
---|
3766 | return -1;
|
---|
3767 | }
|
---|
3768 | }
|
---|
3769 |
|
---|
3770 | qty = min(*sslBytes, (word32)chain[0].iov_len - headerSz);
|
---|
3771 | XMEMCPY(&ssl->buffers.inputBuffer.buffer[length],
|
---|
3772 | (byte*)chain[0].iov_base + headerSz, qty);
|
---|
3773 | offset = length;
|
---|
3774 | for (i = 1; i < chainSz; i++) {
|
---|
3775 | offset += qty;
|
---|
3776 | remainder -= qty;
|
---|
3777 |
|
---|
3778 | if (chain[i].iov_len > remainder)
|
---|
3779 | qty = remainder;
|
---|
3780 | else
|
---|
3781 | qty = (word32)chain[i].iov_len;
|
---|
3782 | XMEMCPY(ssl->buffers.inputBuffer.buffer + offset,
|
---|
3783 | chain[i].iov_base, qty);
|
---|
3784 | }
|
---|
3785 |
|
---|
3786 | *sslBytes += length;
|
---|
3787 | ssl->buffers.inputBuffer.length = *sslBytes;
|
---|
3788 | *sslFrame = ssl->buffers.inputBuffer.buffer;
|
---|
3789 | *end = *sslFrame + *sslBytes;
|
---|
3790 | #endif
|
---|
3791 | (void)chainSz;
|
---|
3792 | }
|
---|
3793 |
|
---|
3794 | if ((*session)->flags.clientHello == 0 && **sslFrame != handshake) {
|
---|
3795 | /* Sanity check the packet for an old style client hello. */
|
---|
3796 | int rhSize = (((*sslFrame)[0] & 0x7f) << 8) | ((*sslFrame)[1]);
|
---|
3797 |
|
---|
3798 | if ((rhSize <= (*sslBytes - 2)) &&
|
---|
3799 | (*sslFrame)[2] == OLD_HELLO_ID && (*sslFrame)[3] == SSLv3_MAJOR) {
|
---|
3800 | #ifdef OLD_HELLO_ALLOWED
|
---|
3801 | int ret = DoOldHello(*session, *sslFrame, &rhSize, sslBytes, error);
|
---|
3802 | if (ret < 0)
|
---|
3803 | return -1; /* error already set */
|
---|
3804 | if (*sslBytes <= 0)
|
---|
3805 | return 1;
|
---|
3806 | #endif
|
---|
3807 | }
|
---|
3808 | else {
|
---|
3809 | #ifdef STARTTLS_ALLOWED
|
---|
3810 | if (ssl->buffers.inputBuffer.dynamicFlag) {
|
---|
3811 | ssl->buffers.inputBuffer.length = 0;
|
---|
3812 | ShrinkInputBuffer(ssl, NO_FORCED_FREE);
|
---|
3813 | }
|
---|
3814 | return 1;
|
---|
3815 | #endif
|
---|
3816 | }
|
---|
3817 | }
|
---|
3818 |
|
---|
3819 | return 0;
|
---|
3820 | }
|
---|
3821 |
|
---|
3822 |
|
---|
3823 | /* See if input on the reassembly list is ready for consuming */
|
---|
3824 | /* returns 1 for TRUE, 0 for FALSE */
|
---|
3825 | static int HaveMoreInput(SnifferSession* session, const byte** sslFrame,
|
---|
3826 | int* sslBytes, const byte** end, char* error)
|
---|
3827 | {
|
---|
3828 | /* sequence and reassembly based on from, not to */
|
---|
3829 | int moreInput = 0;
|
---|
3830 | PacketBuffer** front = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3831 | &session->cliReassemblyList : &session->srvReassemblyList;
|
---|
3832 | word32* expected = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3833 | &session->cliExpected : &session->srvExpected;
|
---|
3834 | /* buffer is on receiving end */
|
---|
3835 | word32* length = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3836 | &session->sslServer->buffers.inputBuffer.length :
|
---|
3837 | &session->sslClient->buffers.inputBuffer.length;
|
---|
3838 | byte** myBuffer = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3839 | &session->sslServer->buffers.inputBuffer.buffer :
|
---|
3840 | &session->sslClient->buffers.inputBuffer.buffer;
|
---|
3841 | word32* bufferSize = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3842 | &session->sslServer->buffers.inputBuffer.bufferSize :
|
---|
3843 | &session->sslClient->buffers.inputBuffer.bufferSize;
|
---|
3844 | SSL* ssl = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3845 | session->sslServer : session->sslClient;
|
---|
3846 | word32* reassemblyMemory = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3847 | &session->cliReassemblyMemory : &session->srvReassemblyMemory;
|
---|
3848 |
|
---|
3849 | while (*front && ((*front)->begin == *expected) ) {
|
---|
3850 | word32 room = *bufferSize - *length;
|
---|
3851 | word32 packetLen = (*front)->end - (*front)->begin + 1;
|
---|
3852 |
|
---|
3853 | if (packetLen > room && *bufferSize < MAX_INPUT_SZ) {
|
---|
3854 | if (GrowInputBuffer(ssl, packetLen, *length) < 0) {
|
---|
3855 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
3856 | return 0;
|
---|
3857 | }
|
---|
3858 | room = *bufferSize - *length; /* bufferSize is now bigger */
|
---|
3859 | }
|
---|
3860 |
|
---|
3861 | if (packetLen <= room) {
|
---|
3862 | PacketBuffer* del = *front;
|
---|
3863 | byte* buf = *myBuffer;
|
---|
3864 |
|
---|
3865 | XMEMCPY(&buf[*length], (*front)->data, packetLen);
|
---|
3866 | *length += packetLen;
|
---|
3867 | *expected += packetLen;
|
---|
3868 |
|
---|
3869 | /* remove used packet */
|
---|
3870 | *front = (*front)->next;
|
---|
3871 |
|
---|
3872 | *reassemblyMemory -= packetLen;
|
---|
3873 | FreePacketBuffer(del);
|
---|
3874 |
|
---|
3875 | moreInput = 1;
|
---|
3876 | }
|
---|
3877 | else
|
---|
3878 | break;
|
---|
3879 | }
|
---|
3880 | if (moreInput) {
|
---|
3881 | *sslFrame = *myBuffer;
|
---|
3882 | *sslBytes = *length;
|
---|
3883 | *end = *myBuffer + *length;
|
---|
3884 | }
|
---|
3885 | return moreInput;
|
---|
3886 | }
|
---|
3887 |
|
---|
3888 |
|
---|
3889 |
|
---|
3890 | /* Process Message(s) from sslFrame */
|
---|
3891 | /* return Number of bytes on success, 0 for no data yet, and -1 on error */
|
---|
3892 | static int ProcessMessage(const byte* sslFrame, SnifferSession* session,
|
---|
3893 | int sslBytes, byte** data, const byte* end,
|
---|
3894 | void* ctx, char* error)
|
---|
3895 | {
|
---|
3896 | const byte* sslBegin = sslFrame;
|
---|
3897 | const byte* recordEnd; /* end of record indicator */
|
---|
3898 | const byte* inRecordEnd; /* indicator from input stream not decrypt */
|
---|
3899 | RecordLayerHeader rh;
|
---|
3900 | int rhSize = 0;
|
---|
3901 | int ret;
|
---|
3902 | int errCode = 0;
|
---|
3903 | int decoded = 0; /* bytes stored for user in data */
|
---|
3904 | int notEnough; /* notEnough bytes yet flag */
|
---|
3905 | int decrypted = 0; /* was current msg decrypted */
|
---|
3906 | SSL* ssl = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
3907 | session->sslServer : session->sslClient;
|
---|
3908 | doMessage:
|
---|
3909 | notEnough = 0;
|
---|
3910 | if (sslBytes < 0) {
|
---|
3911 | SetError(PACKET_HDR_SHORT_STR, error, session, FATAL_ERROR_STATE);
|
---|
3912 | return -1;
|
---|
3913 | }
|
---|
3914 | if (sslBytes >= RECORD_HEADER_SZ) {
|
---|
3915 | if (GetRecordHeader(sslFrame, &rh, &rhSize) != 0) {
|
---|
3916 | SetError(BAD_RECORD_HDR_STR, error, session, FATAL_ERROR_STATE);
|
---|
3917 | return -1;
|
---|
3918 | }
|
---|
3919 | }
|
---|
3920 | else
|
---|
3921 | notEnough = 1;
|
---|
3922 |
|
---|
3923 | if (notEnough || rhSize > (sslBytes - RECORD_HEADER_SZ)) {
|
---|
3924 | /* don't have enough input yet to process full SSL record */
|
---|
3925 | Trace(PARTIAL_INPUT_STR);
|
---|
3926 |
|
---|
3927 | /* store partial if not there already or we advanced */
|
---|
3928 | if (ssl->buffers.inputBuffer.length == 0 || sslBegin != sslFrame) {
|
---|
3929 | if (sslBytes > (int)ssl->buffers.inputBuffer.bufferSize) {
|
---|
3930 | if (GrowInputBuffer(ssl, sslBytes, 0) < 0) {
|
---|
3931 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
3932 | return -1;
|
---|
3933 | }
|
---|
3934 | }
|
---|
3935 | XMEMMOVE(ssl->buffers.inputBuffer.buffer, sslFrame, sslBytes);
|
---|
3936 | ssl->buffers.inputBuffer.length = sslBytes;
|
---|
3937 | }
|
---|
3938 | if (HaveMoreInput(session, &sslFrame, &sslBytes, &end, error))
|
---|
3939 | goto doMessage;
|
---|
3940 | return decoded;
|
---|
3941 | }
|
---|
3942 | sslFrame += RECORD_HEADER_SZ;
|
---|
3943 | sslBytes -= RECORD_HEADER_SZ;
|
---|
3944 | recordEnd = sslFrame + rhSize; /* may have more than one record */
|
---|
3945 | inRecordEnd = recordEnd;
|
---|
3946 |
|
---|
3947 | /* decrypt if needed */
|
---|
3948 | if ((session->flags.side == WOLFSSL_SERVER_END &&
|
---|
3949 | session->flags.serverCipherOn)
|
---|
3950 | || (session->flags.side == WOLFSSL_CLIENT_END &&
|
---|
3951 | session->flags.clientCipherOn)) {
|
---|
3952 | int ivAdvance = 0; /* TLSv1.1 advance amount */
|
---|
3953 | if (ssl->decrypt.setup != 1) {
|
---|
3954 | SetError(DECRYPT_KEYS_NOT_SETUP, error, session, FATAL_ERROR_STATE);
|
---|
3955 | return -1;
|
---|
3956 | }
|
---|
3957 | if (CheckAvailableSize(ssl, rhSize) < 0) {
|
---|
3958 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
3959 | return -1;
|
---|
3960 | }
|
---|
3961 | sslFrame = DecryptMessage(ssl, sslFrame, rhSize,
|
---|
3962 | ssl->buffers.outputBuffer.buffer, &errCode,
|
---|
3963 | &ivAdvance);
|
---|
3964 | recordEnd = sslFrame - ivAdvance + rhSize; /* sslFrame moved so
|
---|
3965 | should recordEnd */
|
---|
3966 | decrypted = 1;
|
---|
3967 |
|
---|
3968 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
3969 | if (errCode != 0) {
|
---|
3970 | INC_STAT(SnifferStats.sslKeyFails);
|
---|
3971 | }
|
---|
3972 | else {
|
---|
3973 | LOCK_STAT();
|
---|
3974 | NOLOCK_INC_STAT(SnifferStats.sslDecryptedPackets);
|
---|
3975 | NOLOCK_ADD_TO_STAT(SnifferStats.sslDecryptedBytes, sslBytes);
|
---|
3976 | UNLOCK_STAT();
|
---|
3977 | }
|
---|
3978 | #endif
|
---|
3979 | if (errCode != 0) {
|
---|
3980 | SetError(BAD_DECRYPT, error, session, FATAL_ERROR_STATE);
|
---|
3981 | return -1;
|
---|
3982 | }
|
---|
3983 | }
|
---|
3984 |
|
---|
3985 | doPart:
|
---|
3986 |
|
---|
3987 | switch ((enum ContentType)rh.type) {
|
---|
3988 | case handshake:
|
---|
3989 | {
|
---|
3990 | int startIdx = sslBytes;
|
---|
3991 | int used;
|
---|
3992 |
|
---|
3993 | Trace(GOT_HANDSHAKE_STR);
|
---|
3994 | ret = DoHandShake(sslFrame, &sslBytes, session, error);
|
---|
3995 | if (ret != 0) {
|
---|
3996 | if (session->flags.fatalError == 0)
|
---|
3997 | SetError(BAD_HANDSHAKE_STR, error, session,
|
---|
3998 | FATAL_ERROR_STATE);
|
---|
3999 | return -1;
|
---|
4000 | }
|
---|
4001 |
|
---|
4002 | /* DoHandShake now fully decrements sslBytes to remaining */
|
---|
4003 | used = startIdx - sslBytes;
|
---|
4004 | sslFrame += used;
|
---|
4005 | if (decrypted)
|
---|
4006 | sslFrame += ssl->keys.padSz;
|
---|
4007 | }
|
---|
4008 | break;
|
---|
4009 | case change_cipher_spec:
|
---|
4010 | if (session->flags.side == WOLFSSL_SERVER_END)
|
---|
4011 | session->flags.serverCipherOn = 1;
|
---|
4012 | else
|
---|
4013 | session->flags.clientCipherOn = 1;
|
---|
4014 | Trace(GOT_CHANGE_CIPHER_STR);
|
---|
4015 | ssl->options.handShakeState = HANDSHAKE_DONE;
|
---|
4016 | ssl->options.handShakeDone = 1;
|
---|
4017 |
|
---|
4018 | sslFrame += 1;
|
---|
4019 | sslBytes -= 1;
|
---|
4020 |
|
---|
4021 | break;
|
---|
4022 | case application_data:
|
---|
4023 | Trace(GOT_APP_DATA_STR);
|
---|
4024 | {
|
---|
4025 | word32 inOutIdx = 0;
|
---|
4026 |
|
---|
4027 | ret = DoApplicationData(ssl, (byte*)sslFrame, &inOutIdx);
|
---|
4028 | if (ret == 0) {
|
---|
4029 | ret = ssl->buffers.clearOutputBuffer.length;
|
---|
4030 | TraceGotData(ret);
|
---|
4031 | if (ret) { /* may be blank message */
|
---|
4032 | if (data != NULL) {
|
---|
4033 | byte* tmpData; /* don't leak on realloc free */
|
---|
4034 | /* add an extra byte at end of allocation in case
|
---|
4035 | * user wants to null terminate plaintext */
|
---|
4036 | tmpData = (byte*)XREALLOC(*data, decoded + ret + 1,
|
---|
4037 | NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
4038 | if (tmpData == NULL) {
|
---|
4039 | ForceZero(*data, decoded);
|
---|
4040 | XFREE(*data, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
4041 | *data = NULL;
|
---|
4042 | SetError(MEMORY_STR, error, session,
|
---|
4043 | FATAL_ERROR_STATE);
|
---|
4044 | return -1;
|
---|
4045 | }
|
---|
4046 | *data = tmpData;
|
---|
4047 | XMEMCPY(*data + decoded,
|
---|
4048 | ssl->buffers.clearOutputBuffer.buffer, ret);
|
---|
4049 | }
|
---|
4050 | else {
|
---|
4051 | #ifdef WOLFSSL_SNIFFER_STORE_DATA_CB
|
---|
4052 | if (StoreDataCb) {
|
---|
4053 | const byte* buf;
|
---|
4054 | word32 offset = 0;
|
---|
4055 | word32 bufSz;
|
---|
4056 | int stored;
|
---|
4057 |
|
---|
4058 | buf = ssl->buffers.clearOutputBuffer.buffer;
|
---|
4059 | bufSz = ssl->buffers.clearOutputBuffer.length;
|
---|
4060 | do {
|
---|
4061 | stored = StoreDataCb(buf, bufSz, offset,
|
---|
4062 | ctx);
|
---|
4063 | if (stored <= 0) {
|
---|
4064 | return -1;
|
---|
4065 | }
|
---|
4066 | offset += stored;
|
---|
4067 | } while (offset < bufSz);
|
---|
4068 | }
|
---|
4069 | else {
|
---|
4070 | SetError(STORE_DATA_CB_MISSING_STR, error,
|
---|
4071 | session, FATAL_ERROR_STATE);
|
---|
4072 | return -1;
|
---|
4073 | }
|
---|
4074 | #else
|
---|
4075 | (void)ctx;
|
---|
4076 | SetError(NO_DATA_DEST_STR, error, session,
|
---|
4077 | FATAL_ERROR_STATE);
|
---|
4078 | return -1;
|
---|
4079 | #endif
|
---|
4080 | }
|
---|
4081 | TraceAddedData(ret, decoded);
|
---|
4082 | decoded += ret;
|
---|
4083 | ssl->buffers.clearOutputBuffer.length = 0;
|
---|
4084 | }
|
---|
4085 | }
|
---|
4086 | else {
|
---|
4087 | SetError(BAD_APP_DATA_STR, error,session,FATAL_ERROR_STATE);
|
---|
4088 | return -1;
|
---|
4089 | }
|
---|
4090 | if (ssl->buffers.outputBuffer.dynamicFlag)
|
---|
4091 | ShrinkOutputBuffer(ssl);
|
---|
4092 |
|
---|
4093 | sslFrame += inOutIdx;
|
---|
4094 | sslBytes -= inOutIdx;
|
---|
4095 | }
|
---|
4096 | break;
|
---|
4097 | case alert:
|
---|
4098 | Trace(GOT_ALERT_STR);
|
---|
4099 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
4100 | INC_STAT(SnifferStats.sslAlerts);
|
---|
4101 | #endif
|
---|
4102 | sslFrame += rhSize;
|
---|
4103 | sslBytes -= rhSize;
|
---|
4104 | break;
|
---|
4105 | case no_type:
|
---|
4106 | default:
|
---|
4107 | SetError(GOT_UNKNOWN_RECORD_STR, error, session, FATAL_ERROR_STATE);
|
---|
4108 | return -1;
|
---|
4109 | }
|
---|
4110 |
|
---|
4111 | /* do we have another msg in record ? */
|
---|
4112 | if (sslFrame < recordEnd) {
|
---|
4113 | Trace(ANOTHER_MSG_STR);
|
---|
4114 | goto doPart;
|
---|
4115 | }
|
---|
4116 |
|
---|
4117 | /* back to input stream instead of potential decrypt buffer */
|
---|
4118 | recordEnd = inRecordEnd;
|
---|
4119 |
|
---|
4120 | /* do we have more records ? */
|
---|
4121 | if (recordEnd < end) {
|
---|
4122 | Trace(ANOTHER_MSG_STR);
|
---|
4123 | sslFrame = recordEnd;
|
---|
4124 | sslBytes = (int)(end - recordEnd);
|
---|
4125 | goto doMessage;
|
---|
4126 | }
|
---|
4127 |
|
---|
4128 | /* clear used input */
|
---|
4129 | ssl->buffers.inputBuffer.length = 0;
|
---|
4130 |
|
---|
4131 | /* could have more input ready now */
|
---|
4132 | if (HaveMoreInput(session, &sslFrame, &sslBytes, &end, error))
|
---|
4133 | goto doMessage;
|
---|
4134 |
|
---|
4135 | if (ssl->buffers.inputBuffer.dynamicFlag)
|
---|
4136 | ShrinkInputBuffer(ssl, NO_FORCED_FREE);
|
---|
4137 |
|
---|
4138 | return decoded;
|
---|
4139 | }
|
---|
4140 |
|
---|
4141 |
|
---|
4142 | /* See if we need to process any pending FIN captures */
|
---|
4143 | /* Return 0=normal, else = session removed */
|
---|
4144 | static int CheckFinCapture(IpInfo* ipInfo, TcpInfo* tcpInfo,
|
---|
4145 | SnifferSession* session)
|
---|
4146 | {
|
---|
4147 | int ret = 0;
|
---|
4148 | if (session->finCaputre.cliFinSeq && session->finCaputre.cliFinSeq <=
|
---|
4149 | session->cliExpected) {
|
---|
4150 | if (session->finCaputre.cliCounted == 0) {
|
---|
4151 | session->flags.finCount += 1;
|
---|
4152 | session->finCaputre.cliCounted = 1;
|
---|
4153 | TraceClientFin(session->finCaputre.cliFinSeq, session->cliExpected);
|
---|
4154 | }
|
---|
4155 | }
|
---|
4156 |
|
---|
4157 | if (session->finCaputre.srvFinSeq && session->finCaputre.srvFinSeq <=
|
---|
4158 | session->srvExpected) {
|
---|
4159 | if (session->finCaputre.srvCounted == 0) {
|
---|
4160 | session->flags.finCount += 1;
|
---|
4161 | session->finCaputre.srvCounted = 1;
|
---|
4162 | TraceServerFin(session->finCaputre.srvFinSeq, session->srvExpected);
|
---|
4163 | }
|
---|
4164 | }
|
---|
4165 |
|
---|
4166 | if (session->flags.finCount >= 2) {
|
---|
4167 | RemoveSession(session, ipInfo, tcpInfo, 0);
|
---|
4168 | ret = 1;
|
---|
4169 | }
|
---|
4170 | return ret;
|
---|
4171 | }
|
---|
4172 |
|
---|
4173 |
|
---|
4174 | /* If session is in fatal error state free resources now
|
---|
4175 | return true if removed, 0 otherwise */
|
---|
4176 | static int RemoveFatalSession(IpInfo* ipInfo, TcpInfo* tcpInfo,
|
---|
4177 | SnifferSession* session, char* error)
|
---|
4178 | {
|
---|
4179 | if (session && session->flags.fatalError == FATAL_ERROR_STATE) {
|
---|
4180 | RemoveSession(session, ipInfo, tcpInfo, 0);
|
---|
4181 | SetError(FATAL_ERROR_STR, error, NULL, 0);
|
---|
4182 | return 1;
|
---|
4183 | }
|
---|
4184 | return 0;
|
---|
4185 | }
|
---|
4186 |
|
---|
4187 |
|
---|
4188 | /* Passes in an IP/TCP packet for decoding (ethernet/localhost frame) removed */
|
---|
4189 | /* returns Number of bytes on success, 0 for no data yet, and -1 on error */
|
---|
4190 | static int ssl_DecodePacketInternal(const byte* packet, int length,
|
---|
4191 | void* vChain, word32 chainSz,
|
---|
4192 | byte** data, SSLInfo* sslInfo,
|
---|
4193 | void* ctx, char* error)
|
---|
4194 | {
|
---|
4195 | TcpInfo tcpInfo;
|
---|
4196 | IpInfo ipInfo;
|
---|
4197 | const byte* sslFrame;
|
---|
4198 | const byte* end;
|
---|
4199 | int sslBytes; /* ssl bytes unconsumed */
|
---|
4200 | int ret;
|
---|
4201 | SnifferSession* session = 0;
|
---|
4202 |
|
---|
4203 | #ifdef WOLFSSL_SNIFFER_CHAIN_INPUT
|
---|
4204 | if (packet == NULL && vChain != NULL) {
|
---|
4205 | struct iovec* chain = (struct iovec*)vChain;
|
---|
4206 | word32 i;
|
---|
4207 |
|
---|
4208 | length = 0;
|
---|
4209 | for (i = 0; i < chainSz; i++)
|
---|
4210 | length += chain[i].iov_len;
|
---|
4211 | packet = (const byte*)chain[0].iov_base;
|
---|
4212 | }
|
---|
4213 | #endif
|
---|
4214 |
|
---|
4215 | if (CheckHeaders(&ipInfo, &tcpInfo, packet, length, &sslFrame, &sslBytes,
|
---|
4216 | error) != 0)
|
---|
4217 | return -1;
|
---|
4218 |
|
---|
4219 | end = sslFrame + sslBytes;
|
---|
4220 |
|
---|
4221 | ret = CheckSession(&ipInfo, &tcpInfo, sslBytes, &session, error);
|
---|
4222 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1;
|
---|
4223 | else if (ret == -1) return -1;
|
---|
4224 | else if (ret == 1) {
|
---|
4225 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
4226 | if (sslBytes > 0) {
|
---|
4227 | LOCK_STAT();
|
---|
4228 | NOLOCK_INC_STAT(SnifferStats.sslEncryptedPackets);
|
---|
4229 | NOLOCK_ADD_TO_STAT(SnifferStats.sslEncryptedBytes, sslBytes);
|
---|
4230 | UNLOCK_STAT();
|
---|
4231 | }
|
---|
4232 | else
|
---|
4233 | INC_STAT(SnifferStats.sslDecryptedPackets);
|
---|
4234 | #endif
|
---|
4235 | return 0; /* done for now */
|
---|
4236 | }
|
---|
4237 |
|
---|
4238 | ret = CheckSequence(&ipInfo, &tcpInfo, session, &sslBytes, &sslFrame,error);
|
---|
4239 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1;
|
---|
4240 | else if (ret == -1) return -1;
|
---|
4241 | else if (ret == 1) {
|
---|
4242 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
4243 | INC_STAT(SnifferStats.sslDecryptedPackets);
|
---|
4244 | #endif
|
---|
4245 | return 0; /* done for now */
|
---|
4246 | }
|
---|
4247 |
|
---|
4248 | ret = CheckPreRecord(&ipInfo, &tcpInfo, &sslFrame, &session, &sslBytes,
|
---|
4249 | &end, vChain, chainSz, error);
|
---|
4250 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1;
|
---|
4251 | else if (ret == -1) return -1;
|
---|
4252 | else if (ret == 1) {
|
---|
4253 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
4254 | INC_STAT(SnifferStats.sslDecryptedPackets);
|
---|
4255 | #endif
|
---|
4256 | return 0; /* done for now */
|
---|
4257 | }
|
---|
4258 |
|
---|
4259 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
4260 | if (sslBytes > 0) {
|
---|
4261 | LOCK_STAT();
|
---|
4262 | NOLOCK_INC_STAT(SnifferStats.sslEncryptedPackets);
|
---|
4263 | NOLOCK_ADD_TO_STAT(SnifferStats.sslEncryptedBytes, sslBytes);
|
---|
4264 | UNLOCK_STAT();
|
---|
4265 | }
|
---|
4266 | else
|
---|
4267 | INC_STAT(SnifferStats.sslDecryptedPackets);
|
---|
4268 | #endif
|
---|
4269 |
|
---|
4270 | ret = ProcessMessage(sslFrame, session, sslBytes, data, end, ctx, error);
|
---|
4271 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1;
|
---|
4272 | if (CheckFinCapture(&ipInfo, &tcpInfo, session) == 0) {
|
---|
4273 | CopySessionInfo(session, sslInfo);
|
---|
4274 | }
|
---|
4275 |
|
---|
4276 | return ret;
|
---|
4277 | }
|
---|
4278 |
|
---|
4279 |
|
---|
4280 | /* Passes in an IP/TCP packet for decoding (ethernet/localhost frame) removed */
|
---|
4281 | /* returns Number of bytes on success, 0 for no data yet, and -1 on error */
|
---|
4282 | /* Also returns Session Info if available */
|
---|
4283 | int ssl_DecodePacketWithSessionInfo(const unsigned char* packet, int length,
|
---|
4284 | unsigned char** data, SSLInfo* sslInfo, char* error)
|
---|
4285 | {
|
---|
4286 | return ssl_DecodePacketInternal(packet, length, NULL, 0, data, sslInfo,
|
---|
4287 | NULL, error);
|
---|
4288 | }
|
---|
4289 |
|
---|
4290 |
|
---|
4291 | /* Passes in an IP/TCP packet for decoding (ethernet/localhost frame) removed */
|
---|
4292 | /* returns Number of bytes on success, 0 for no data yet, and -1 on error */
|
---|
4293 | int ssl_DecodePacket(const byte* packet, int length, byte** data, char* error)
|
---|
4294 | {
|
---|
4295 | return ssl_DecodePacketInternal(packet, length, NULL, 0, data, NULL, NULL,
|
---|
4296 | error);
|
---|
4297 | }
|
---|
4298 |
|
---|
4299 |
|
---|
4300 | #ifdef WOLFSSL_SNIFFER_STORE_DATA_CB
|
---|
4301 |
|
---|
4302 | int ssl_DecodePacketWithSessionInfoStoreData(const unsigned char* packet,
|
---|
4303 | int length, void* ctx, SSLInfo* sslInfo, char* error)
|
---|
4304 | {
|
---|
4305 | return ssl_DecodePacketInternal(packet, length, NULL, 0, NULL, sslInfo,
|
---|
4306 | ctx, error);
|
---|
4307 | }
|
---|
4308 |
|
---|
4309 | #endif
|
---|
4310 |
|
---|
4311 |
|
---|
4312 | #ifdef WOLFSSL_SNIFFER_CHAIN_INPUT
|
---|
4313 |
|
---|
4314 | int ssl_DecodePacketWithChain(void* vChain, word32 chainSz, byte** data,
|
---|
4315 | char* error)
|
---|
4316 | {
|
---|
4317 | return ssl_DecodePacketInternal(NULL, 0, vChain, chainSz, data, NULL, NULL,
|
---|
4318 | error);
|
---|
4319 | }
|
---|
4320 |
|
---|
4321 | #endif
|
---|
4322 |
|
---|
4323 |
|
---|
4324 | #if defined(WOLFSSL_SNIFFER_CHAIN_INPUT) && \
|
---|
4325 | defined(WOLFSSL_SNIFFER_STORE_DATA_CB)
|
---|
4326 |
|
---|
4327 | int ssl_DecodePacketWithChainSessionInfoStoreData(void* vChain, word32 chainSz,
|
---|
4328 | void* ctx, SSLInfo* sslInfo, char* error)
|
---|
4329 | {
|
---|
4330 | return ssl_DecodePacketInternal(NULL, 0, vChain, chainSz, NULL, sslInfo,
|
---|
4331 | ctx, error);
|
---|
4332 | }
|
---|
4333 |
|
---|
4334 | #endif
|
---|
4335 |
|
---|
4336 |
|
---|
4337 | /* Deallocator for the decoded data buffer. */
|
---|
4338 | /* returns 0 on success, -1 on error */
|
---|
4339 | int ssl_FreeDecodeBuffer(byte** data, char* error)
|
---|
4340 | {
|
---|
4341 | return ssl_FreeZeroDecodeBuffer(data, 0, error);
|
---|
4342 | }
|
---|
4343 |
|
---|
4344 |
|
---|
4345 | /* Deallocator for the decoded data buffer, zeros out buffer. */
|
---|
4346 | /* returns 0 on success, -1 on error */
|
---|
4347 | int ssl_FreeZeroDecodeBuffer(byte** data, int sz, char* error)
|
---|
4348 | {
|
---|
4349 | (void)error;
|
---|
4350 |
|
---|
4351 | if (sz < 0) {
|
---|
4352 | return -1;
|
---|
4353 | }
|
---|
4354 |
|
---|
4355 | if (data != NULL) {
|
---|
4356 | ForceZero(*data, (word32)sz);
|
---|
4357 | XFREE(*data, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
4358 | *data = NULL;
|
---|
4359 | }
|
---|
4360 |
|
---|
4361 | return 0;
|
---|
4362 | }
|
---|
4363 |
|
---|
4364 |
|
---|
4365 | /* Enables (if traceFile)/ Disables debug tracing */
|
---|
4366 | /* returns 0 on success, -1 on error */
|
---|
4367 | int ssl_Trace(const char* traceFile, char* error)
|
---|
4368 | {
|
---|
4369 | if (traceFile) {
|
---|
4370 | /* Don't try to reopen the file */
|
---|
4371 | if (TraceFile == NULL) {
|
---|
4372 | TraceFile = fopen(traceFile, "a");
|
---|
4373 | if (!TraceFile) {
|
---|
4374 | SetError(BAD_TRACE_FILE_STR, error, NULL, 0);
|
---|
4375 | return -1;
|
---|
4376 | }
|
---|
4377 | TraceOn = 1;
|
---|
4378 | }
|
---|
4379 | }
|
---|
4380 | else
|
---|
4381 | TraceOn = 0;
|
---|
4382 |
|
---|
4383 | return 0;
|
---|
4384 | }
|
---|
4385 |
|
---|
4386 |
|
---|
4387 | /* Enables/Disables Recovery of missed data if later packets allow
|
---|
4388 | * maxMemory is number of bytes to use for reassembly buffering per session,
|
---|
4389 | * -1 means unlimited
|
---|
4390 | * returns 0 on success, -1 on error */
|
---|
4391 | int ssl_EnableRecovery(int onOff, int maxMemory, char* error)
|
---|
4392 | {
|
---|
4393 | (void)error;
|
---|
4394 |
|
---|
4395 | RecoveryEnabled = onOff;
|
---|
4396 | if (onOff)
|
---|
4397 | MaxRecoveryMemory = maxMemory;
|
---|
4398 |
|
---|
4399 | return 0;
|
---|
4400 | }
|
---|
4401 |
|
---|
4402 |
|
---|
4403 |
|
---|
4404 | #ifdef WOLFSSL_SESSION_STATS
|
---|
4405 |
|
---|
4406 | int ssl_GetSessionStats(unsigned int* active, unsigned int* total,
|
---|
4407 | unsigned int* peak, unsigned int* maxSessions,
|
---|
4408 | unsigned int* missedData, unsigned int* reassemblyMem,
|
---|
4409 | char* error)
|
---|
4410 | {
|
---|
4411 | int ret;
|
---|
4412 |
|
---|
4413 | if (missedData) {
|
---|
4414 | wc_LockMutex(&RecoveryMutex);
|
---|
4415 | *missedData = MissedDataSessions;
|
---|
4416 | wc_UnLockMutex(&RecoveryMutex);
|
---|
4417 | }
|
---|
4418 |
|
---|
4419 | if (reassemblyMem) {
|
---|
4420 | SnifferSession* session;
|
---|
4421 | int i;
|
---|
4422 |
|
---|
4423 | *reassemblyMem = 0;
|
---|
4424 | wc_LockMutex(&SessionMutex);
|
---|
4425 | for (i = 0; i < HASH_SIZE; i++) {
|
---|
4426 | session = SessionTable[i];
|
---|
4427 | while (session) {
|
---|
4428 | *reassemblyMem += session->cliReassemblyMemory;
|
---|
4429 | *reassemblyMem += session->srvReassemblyMemory;
|
---|
4430 | session = session->next;
|
---|
4431 | }
|
---|
4432 | }
|
---|
4433 | wc_UnLockMutex(&SessionMutex);
|
---|
4434 | }
|
---|
4435 |
|
---|
4436 | ret = wolfSSL_get_session_stats(active, total, peak, maxSessions);
|
---|
4437 |
|
---|
4438 | if (ret == WOLFSSL_SUCCESS)
|
---|
4439 | return 0;
|
---|
4440 | else {
|
---|
4441 | SetError(BAD_SESSION_STATS, error, NULL, 0);
|
---|
4442 | return -1;
|
---|
4443 | }
|
---|
4444 | }
|
---|
4445 |
|
---|
4446 | #endif
|
---|
4447 |
|
---|
4448 |
|
---|
4449 |
|
---|
4450 | int ssl_SetConnectionCb(SSLConnCb cb)
|
---|
4451 | {
|
---|
4452 | ConnectionCb = cb;
|
---|
4453 | return 0;
|
---|
4454 | }
|
---|
4455 |
|
---|
4456 |
|
---|
4457 |
|
---|
4458 | int ssl_SetConnectionCtx(void* ctx)
|
---|
4459 | {
|
---|
4460 | ConnectionCbCtx = ctx;
|
---|
4461 | return 0;
|
---|
4462 | }
|
---|
4463 |
|
---|
4464 |
|
---|
4465 | #ifdef WOLFSSL_SNIFFER_STATS
|
---|
4466 |
|
---|
4467 | /* Resets the statistics tracking global structure.
|
---|
4468 | * returns 0 on success, -1 on error */
|
---|
4469 | int ssl_ResetStatistics(void)
|
---|
4470 | {
|
---|
4471 | wc_LockMutex(&StatsMutex);
|
---|
4472 | XMEMSET(&SnifferStats, 0, sizeof(SSLStats));
|
---|
4473 | wc_UnLockMutex(&StatsMutex);
|
---|
4474 | return 0;
|
---|
4475 | }
|
---|
4476 |
|
---|
4477 |
|
---|
4478 | /* Copies the SSL statistics into the provided stats record.
|
---|
4479 | * returns 0 on success, -1 on error */
|
---|
4480 | int ssl_ReadStatistics(SSLStats* stats)
|
---|
4481 | {
|
---|
4482 | if (stats == NULL)
|
---|
4483 | return -1;
|
---|
4484 |
|
---|
4485 | LOCK_STAT();
|
---|
4486 | XMEMCPY(stats, &SnifferStats, sizeof(SSLStats));
|
---|
4487 | UNLOCK_STAT();
|
---|
4488 | return 0;
|
---|
4489 | }
|
---|
4490 |
|
---|
4491 | /* Copies the SSL statistics into the provided stats record then
|
---|
4492 | * resets the statistics tracking global structure.
|
---|
4493 | * returns 0 on success, -1 on error */
|
---|
4494 | int ssl_ReadResetStatistics(SSLStats* stats)
|
---|
4495 | {
|
---|
4496 | if (stats == NULL)
|
---|
4497 | return -1;
|
---|
4498 |
|
---|
4499 | LOCK_STAT();
|
---|
4500 | XMEMCPY(stats, &SnifferStats, sizeof(SSLStats));
|
---|
4501 | XMEMSET(&SnifferStats, 0, sizeof(SSLStats));
|
---|
4502 | UNLOCK_STAT();
|
---|
4503 | return 0;
|
---|
4504 | }
|
---|
4505 |
|
---|
4506 | #endif /* WOLFSSL_SNIFFER_STATS */
|
---|
4507 |
|
---|
4508 |
|
---|
4509 | #ifdef WOLFSSL_SNIFFER_WATCH
|
---|
4510 |
|
---|
4511 | int ssl_SetWatchKeyCallback_ex(SSLWatchCb cb, int devId, char* error)
|
---|
4512 | {
|
---|
4513 | (void)devId;
|
---|
4514 | WatchCb = cb;
|
---|
4515 | return CreateWatchSnifferServer(error);
|
---|
4516 | }
|
---|
4517 |
|
---|
4518 |
|
---|
4519 | int ssl_SetWatchKeyCallback(SSLWatchCb cb, char* error)
|
---|
4520 | {
|
---|
4521 | WatchCb = cb;
|
---|
4522 | return CreateWatchSnifferServer(error);
|
---|
4523 | }
|
---|
4524 |
|
---|
4525 |
|
---|
4526 | int ssl_SetWatchKeyCtx(void* ctx, char* error)
|
---|
4527 | {
|
---|
4528 | (void)error;
|
---|
4529 | WatchCbCtx = ctx;
|
---|
4530 | return 0;
|
---|
4531 | }
|
---|
4532 |
|
---|
4533 |
|
---|
4534 | int ssl_SetWatchKey_buffer(void* vSniffer, const byte* key, word32 keySz,
|
---|
4535 | int keyType, char* error)
|
---|
4536 | {
|
---|
4537 | SnifferSession* sniffer;
|
---|
4538 | int ret;
|
---|
4539 |
|
---|
4540 | if (vSniffer == NULL) {
|
---|
4541 | return -1;
|
---|
4542 | }
|
---|
4543 | if (key == NULL || keySz == 0) {
|
---|
4544 | return -1;
|
---|
4545 | }
|
---|
4546 |
|
---|
4547 | sniffer = (SnifferSession*)vSniffer;
|
---|
4548 | /* Remap the keyType from what the user can use to
|
---|
4549 | * what wolfSSL_use_PrivateKey_buffer expects. */
|
---|
4550 | keyType = (keyType == FILETYPE_PEM) ? WOLFSSL_FILETYPE_PEM :
|
---|
4551 | WOLFSSL_FILETYPE_ASN1;
|
---|
4552 |
|
---|
4553 | ret = wolfSSL_use_PrivateKey_buffer(sniffer->sslServer,
|
---|
4554 | key, keySz, keyType);
|
---|
4555 | if (ret != WOLFSSL_SUCCESS) {
|
---|
4556 | SetError(KEY_FILE_STR, error, sniffer, FATAL_ERROR_STATE);
|
---|
4557 | return -1;
|
---|
4558 | }
|
---|
4559 |
|
---|
4560 | return 0;
|
---|
4561 | }
|
---|
4562 |
|
---|
4563 |
|
---|
4564 | int ssl_SetWatchKey_file(void* vSniffer, const char* keyFile, int keyType,
|
---|
4565 | const char* password, char* error)
|
---|
4566 | {
|
---|
4567 | byte* keyBuf = NULL;
|
---|
4568 | word32 keyBufSz = 0;
|
---|
4569 | int ret;
|
---|
4570 |
|
---|
4571 | if (vSniffer == NULL) {
|
---|
4572 | return -1;
|
---|
4573 | }
|
---|
4574 | if (keyFile == NULL) {
|
---|
4575 | return -1;
|
---|
4576 | }
|
---|
4577 |
|
---|
4578 | /* Remap the keyType from what the user can use to
|
---|
4579 | * what LoadKeyFile expects. */
|
---|
4580 | keyType = (keyType == FILETYPE_PEM) ? WOLFSSL_FILETYPE_PEM :
|
---|
4581 | WOLFSSL_FILETYPE_ASN1;
|
---|
4582 |
|
---|
4583 | ret = LoadKeyFile(&keyBuf, &keyBufSz, keyFile, keyType, password);
|
---|
4584 | if (ret < 0) {
|
---|
4585 | SetError(KEY_FILE_STR, error, NULL, 0);
|
---|
4586 | XFREE(keyBuf, NULL, DYNAMIC_TYPE_X509);
|
---|
4587 | return -1;
|
---|
4588 | }
|
---|
4589 |
|
---|
4590 | ret = ssl_SetWatchKey_buffer(vSniffer, keyBuf, keyBufSz, FILETYPE_DER,
|
---|
4591 | error);
|
---|
4592 | XFREE(keyBuf, NULL, DYNAMIC_TYPE_X509);
|
---|
4593 |
|
---|
4594 | return ret;
|
---|
4595 | }
|
---|
4596 |
|
---|
4597 | #endif /* WOLFSSL_SNIFFER_WATCH */
|
---|
4598 |
|
---|
4599 |
|
---|
4600 | #ifdef WOLFSSL_SNIFFER_STORE_DATA_CB
|
---|
4601 |
|
---|
4602 | int ssl_SetStoreDataCallback(SSLStoreDataCb cb)
|
---|
4603 | {
|
---|
4604 | StoreDataCb = cb;
|
---|
4605 | return 0;
|
---|
4606 | }
|
---|
4607 |
|
---|
4608 | #endif /* WOLFSSL_SNIFFER_STORE_DATA_CB */
|
---|
4609 |
|
---|
4610 | #endif /* WOLFSSL_SNIFFER */
|
---|
4611 | #endif /* WOLFCRYPT_ONLY */
|
---|