[337] | 1 | /* sniffer.c
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| 2 | *
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| 3 | * Copyright (C) 2006-2017 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 | #endif
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| 38 |
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| 39 | #ifdef _WIN32
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| 40 | #define SNPRINTF _snprintf
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| 41 | #else
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| 42 | #define SNPRINTF snprintf
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| 43 | #endif
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| 44 |
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| 45 | #include <wolfssl/openssl/ssl.h>
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| 46 | #include <wolfssl/internal.h>
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| 47 | #include <wolfssl/error-ssl.h>
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| 48 | #include <wolfssl/sniffer.h>
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| 49 | #include <wolfssl/sniffer_error.h>
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| 50 | #ifdef NO_INLINE
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| 51 | #include <wolfssl/wolfcrypt/misc.h>
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| 52 | #else
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| 53 | #define WOLFSSL_MISC_INCLUDED
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| 54 | #include <wolfcrypt/src/misc.c>
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| 55 | #endif
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| 56 |
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| 57 |
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| 58 | #ifndef WOLFSSL_SNIFFER_TIMEOUT
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| 59 | #define WOLFSSL_SNIFFER_TIMEOUT 900
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| 60 | /* Cache unclosed Sessions for 15 minutes since last used */
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| 61 | #endif
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| 62 |
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| 63 | /* Misc constants */
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| 64 | enum {
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| 65 | MAX_SERVER_ADDRESS = 128, /* maximum server address length */
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| 66 | MAX_SERVER_NAME = 128, /* maximum server name length */
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| 67 | MAX_ERROR_LEN = 80, /* maximum error length */
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| 68 | ETHER_IF_ADDR_LEN = 6, /* ethernet interface address length */
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| 69 | LOCAL_IF_ADDR_LEN = 4, /* localhost interface address length, !windows */
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| 70 | TCP_PROTO = 6, /* TCP_PROTOCOL */
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| 71 | IP_HDR_SZ = 20, /* IP header length, min */
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| 72 | TCP_HDR_SZ = 20, /* TCP header length, min */
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| 73 | IPV4 = 4, /* IP version 4 */
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| 74 | TCP_PROTOCOL = 6, /* TCP Protocol id */
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| 75 | TRACE_MSG_SZ = 80, /* Trace Message buffer size */
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| 76 | HASH_SIZE = 499, /* Session Hash Table Rows */
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| 77 | PSEUDO_HDR_SZ = 12, /* TCP Pseudo Header size in bytes */
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| 78 | FATAL_ERROR_STATE = 1, /* SnifferSession fatal error state */
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| 79 | TICKET_HINT_LEN = 4, /* Session Ticket Hint length */
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| 80 | EXT_TYPE_SZ = 2, /* Extension length */
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| 81 | MAX_INPUT_SZ = MAX_RECORD_SIZE + COMP_EXTRA + MAX_MSG_EXTRA +
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| 82 | MTU_EXTRA, /* Max input sz of reassembly */
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| 83 | EXT_MASTER_SECRET = 0x17, /* Extended Master Secret Extension ID */
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| 84 | TICKET_EXT_ID = 0x23 /* Session Ticket Extension ID */
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| 85 | };
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| 86 |
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| 87 |
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| 88 | #ifdef _WIN32
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| 89 |
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| 90 | static HMODULE dllModule; /* for error string resources */
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| 91 |
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| 92 | BOOL APIENTRY DllMain( HMODULE hModule,
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| 93 | DWORD ul_reason_for_call,
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| 94 | LPVOID lpReserved
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| 95 | )
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| 96 | {
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| 97 | static int didInit = 0;
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| 98 |
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| 99 | switch (ul_reason_for_call)
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| 100 | {
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| 101 | case DLL_PROCESS_ATTACH:
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| 102 | if (didInit == 0) {
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| 103 | dllModule = hModule;
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| 104 | ssl_InitSniffer();
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| 105 | didInit = 1;
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| 106 | }
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| 107 | break;
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| 108 | case DLL_THREAD_ATTACH:
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| 109 | break;
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| 110 | case DLL_THREAD_DETACH:
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| 111 | break;
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| 112 | case DLL_PROCESS_DETACH:
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| 113 | if (didInit) {
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| 114 | ssl_FreeSniffer();
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| 115 | didInit = 0;
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| 116 | }
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| 117 | break;
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| 118 | }
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| 119 | return TRUE;
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| 120 | }
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| 121 |
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| 122 | #endif /* _WIN32 */
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| 123 |
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| 124 |
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| 125 | static int TraceOn = 0; /* Trace is off by default */
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| 126 | static FILE* TraceFile = 0;
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| 127 |
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| 128 |
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| 129 | /* windows uses .rc table for this */
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| 130 | #ifndef _WIN32
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| 131 |
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| 132 | static const char* const msgTable[] =
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| 133 | {
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| 134 | /* 1 */
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| 135 | "Out of Memory",
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| 136 | "New SSL Sniffer Server Registered",
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| 137 | "Checking IP Header",
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| 138 | "SSL Sniffer Server Not Registered",
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| 139 | "Checking TCP Header",
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| 140 |
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| 141 | /* 6 */
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| 142 | "SSL Sniffer Server Port Not Registered",
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| 143 | "RSA Private Decrypt Error",
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| 144 | "RSA Private Decode Error",
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| 145 | "Set Cipher Spec Error",
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| 146 | "Server Hello Input Malformed",
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| 147 |
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| 148 | /* 11 */
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| 149 | "Couldn't Resume Session Error",
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| 150 | "Server Did Resumption",
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| 151 | "Client Hello Input Malformed",
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| 152 | "Client Trying to Resume",
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| 153 | "Handshake Input Malformed",
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| 154 |
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| 155 | /* 16 */
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| 156 | "Got Hello Verify msg",
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| 157 | "Got Server Hello msg",
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| 158 | "Got Cert Request msg",
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| 159 | "Got Server Key Exchange msg",
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| 160 | "Got Cert msg",
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| 161 |
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| 162 | /* 21 */
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| 163 | "Got Server Hello Done msg",
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| 164 | "Got Finished msg",
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| 165 | "Got Client Hello msg",
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| 166 | "Got Client Key Exchange msg",
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| 167 | "Got Cert Verify msg",
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| 168 |
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| 169 | /* 26 */
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| 170 | "Got Unknown Handshake msg",
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| 171 | "New SSL Sniffer Session created",
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| 172 | "Couldn't create new SSL",
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| 173 | "Got a Packet to decode",
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| 174 | "No data present",
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| 175 |
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| 176 | /* 31 */
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| 177 | "Session Not Found",
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| 178 | "Got an Old Client Hello msg",
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| 179 | "Old Client Hello Input Malformed",
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| 180 | "Old Client Hello OK",
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| 181 | "Bad Old Client Hello",
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| 182 |
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| 183 | /* 36 */
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| 184 | "Bad Record Header",
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| 185 | "Record Header Input Malformed",
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| 186 | "Got a HandShake msg",
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| 187 | "Bad HandShake msg",
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| 188 | "Got a Change Cipher Spec msg",
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| 189 |
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| 190 | /* 41 */
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| 191 | "Got Application Data msg",
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| 192 | "Bad Application Data",
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| 193 | "Got an Alert msg",
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| 194 | "Another msg to Process",
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| 195 | "Removing Session From Table",
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| 196 |
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| 197 | /* 46 */
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| 198 | "Bad Key File",
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| 199 | "Wrong IP Version",
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| 200 | "Wrong Protocol type",
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| 201 | "Packet Short for header processing",
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| 202 | "Got Unknown Record Type",
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| 203 |
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| 204 | /* 51 */
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| 205 | "Can't Open Trace File",
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| 206 | "Session in Fatal Error State",
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| 207 | "Partial SSL record received",
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| 208 | "Buffer Error, malformed input",
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| 209 | "Added to Partial Input",
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| 210 |
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| 211 | /* 56 */
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| 212 | "Received a Duplicate Packet",
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| 213 | "Received an Out of Order Packet",
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| 214 | "Received an Overlap Duplicate Packet",
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| 215 | "Received an Overlap Reassembly Begin Duplicate Packet",
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| 216 | "Received an Overlap Reassembly End Duplicate Packet",
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| 217 |
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| 218 | /* 61 */
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| 219 | "Missed the Client Hello Entirely",
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| 220 | "Got Hello Request msg",
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| 221 | "Got Session Ticket msg",
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| 222 | "Bad Input",
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| 223 | "Bad Decrypt Type",
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| 224 |
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| 225 | /* 66 */
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| 226 | "Bad Finished Message Processing",
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| 227 | "Bad Compression Type",
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| 228 | "Bad DeriveKeys Error",
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| 229 | "Saw ACK for Missing Packet Error",
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| 230 | "Bad Decrypt Operation",
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| 231 |
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| 232 | /* 71 */
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| 233 | "Decrypt Keys Not Set Up",
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| 234 | "Late Key Load Error",
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| 235 | "Got Certificate Status msg",
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| 236 | "RSA Key Missing Error",
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| 237 | "Secure Renegotiation Not Supported",
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| 238 |
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| 239 | /* 76 */
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| 240 | "Get Session Stats Failure",
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| 241 | "Reassembly Buffer Size Exceeded",
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| 242 | "Dropping Lost Fragment",
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| 243 | "Dropping Partial Record",
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| 244 | "Clear ACK Fault",
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| 245 |
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| 246 | /* 81 */
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| 247 | "Bad Decrypt Size",
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| 248 | "Extended Master Secret Hash Error"
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| 249 | };
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| 250 |
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| 251 |
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| 252 | /* *nix version uses table above */
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| 253 | static void GetError(int idx, char* str)
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| 254 | {
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| 255 | XSTRNCPY(str, msgTable[idx - 1], MAX_ERROR_LEN);
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| 256 | }
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| 257 |
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| 258 |
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| 259 | #else /* _WIN32 */
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| 260 |
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| 261 |
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| 262 | /* Windows version uses .rc table */
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| 263 | static void GetError(int idx, char* buffer)
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| 264 | {
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| 265 | if (!LoadStringA(dllModule, idx, buffer, MAX_ERROR_LEN))
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| 266 | buffer[0] = 0;
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| 267 | }
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| 268 |
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| 269 |
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| 270 | #endif /* _WIN32 */
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| 271 |
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| 272 |
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| 273 | /* Packet Buffer for reassembly list and ready list */
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| 274 | typedef struct PacketBuffer {
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| 275 | word32 begin; /* relative sequence begin */
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| 276 | word32 end; /* relative sequence end */
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| 277 | byte* data; /* actual data */
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| 278 | struct PacketBuffer* next; /* next on reassembly list or ready list */
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| 279 | } PacketBuffer;
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| 280 |
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| 281 |
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| 282 | #ifdef HAVE_SNI
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| 283 |
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| 284 | /* NamedKey maps a SNI name to a specific private key */
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| 285 | typedef struct NamedKey {
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| 286 | char name[MAX_SERVER_NAME]; /* server DNS name */
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| 287 | word32 nameSz; /* size of server DNS name */
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| 288 | byte* key; /* DER private key */
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| 289 | word32 keySz; /* size of DER private key */
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| 290 | struct NamedKey* next; /* for list */
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| 291 | } NamedKey;
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| 292 |
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| 293 | #endif
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| 294 |
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| 295 |
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| 296 | /* Sniffer Server holds info for each server/port monitored */
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| 297 | typedef struct SnifferServer {
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| 298 | SSL_CTX* ctx; /* SSL context */
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| 299 | char address[MAX_SERVER_ADDRESS]; /* passed in server address */
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| 300 | word32 server; /* netowrk order address */
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| 301 | int port; /* server port */
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| 302 | #ifdef HAVE_SNI
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| 303 | NamedKey* namedKeys; /* mapping of names and keys */
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| 304 | wolfSSL_Mutex namedKeysMutex; /* mutex for namedKey list */
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| 305 | #endif
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| 306 | struct SnifferServer* next; /* for list */
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| 307 | } SnifferServer;
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| 308 |
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| 309 |
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| 310 | /* Session Flags */
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| 311 | typedef struct Flags {
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| 312 | byte side; /* which end is current packet headed */
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| 313 | byte serverCipherOn; /* indicates whether cipher is active */
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| 314 | byte clientCipherOn; /* indicates whether cipher is active */
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| 315 | byte resuming; /* did this session come from resumption */
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| 316 | byte cached; /* have we cached this session yet */
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| 317 | byte clientHello; /* processed client hello yet, for SSLv2 */
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| 318 | byte finCount; /* get both FINs before removing */
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| 319 | byte fatalError; /* fatal error state */
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| 320 | byte cliAckFault; /* client acked unseen data from server */
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| 321 | byte srvAckFault; /* server acked unseen data from client */
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| 322 | byte cliSkipPartial; /* client skips partial data to catch up */
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| 323 | byte srvSkipPartial; /* server skips partial data to catch up */
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| 324 | #ifdef HAVE_EXTENDED_MASTER
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| 325 | byte expectEms; /* expect extended master secret */
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| 326 | #endif
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| 327 | } Flags;
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| 328 |
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| 329 |
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| 330 | /* Out of Order FIN caputre */
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| 331 | typedef struct FinCaputre {
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| 332 | word32 cliFinSeq; /* client relative sequence FIN 0 is no */
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| 333 | word32 srvFinSeq; /* server relative sequence FIN, 0 is no */
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| 334 | byte cliCounted; /* did we count yet, detects duplicates */
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| 335 | byte srvCounted; /* did we count yet, detects duplicates */
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| 336 | } FinCaputre;
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| 337 |
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| 338 |
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| 339 | typedef struct HsHashes {
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| 340 | #ifndef NO_OLD_TLS
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| 341 | #ifndef NO_SHA
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| 342 | wc_Sha hashSha;
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| 343 | #endif
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| 344 | #ifndef NO_MD5
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| 345 | wc_Md5 hashMd5;
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| 346 | #endif
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| 347 | #endif
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| 348 | #ifndef NO_SHA256
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| 349 | wc_Sha256 hashSha256;
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| 350 | #endif
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| 351 | #ifdef WOLFSSL_SHA384
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| 352 | wc_Sha384 hashSha384;
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| 353 | #endif
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| 354 | } HsHashes;
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| 355 |
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| 356 |
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| 357 | /* Sniffer Session holds info for each client/server SSL/TLS session */
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| 358 | typedef struct SnifferSession {
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| 359 | SnifferServer* context; /* server context */
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| 360 | SSL* sslServer; /* SSL server side decode */
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| 361 | SSL* sslClient; /* SSL client side decode */
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| 362 | word32 server; /* server address in network byte order */
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| 363 | word32 client; /* client address in network byte order */
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| 364 | word16 srvPort; /* server port */
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| 365 | word16 cliPort; /* client port */
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| 366 | word32 cliSeqStart; /* client start sequence */
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| 367 | word32 srvSeqStart; /* server start sequence */
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| 368 | word32 cliExpected; /* client expected sequence (relative) */
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| 369 | word32 srvExpected; /* server expected sequence (relative) */
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| 370 | FinCaputre finCaputre; /* retain out of order FIN s */
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| 371 | Flags flags; /* session flags */
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| 372 | time_t lastUsed; /* last used ticks */
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| 373 | PacketBuffer* cliReassemblyList; /* client out of order packets */
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| 374 | PacketBuffer* srvReassemblyList; /* server out of order packets */
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| 375 | word32 cliReassemblyMemory; /* client packet memory used */
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| 376 | word32 srvReassemblyMemory; /* server packet memory used */
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| 377 | struct SnifferSession* next; /* for hash table list */
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| 378 | byte* ticketID; /* mac ID of session ticket */
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| 379 | #ifdef HAVE_EXTENDED_MASTER
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| 380 | HsHashes* hash;
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| 381 | #endif
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| 382 | } SnifferSession;
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| 383 |
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| 384 |
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| 385 | /* Sniffer Server List and mutex */
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| 386 | static SnifferServer* ServerList = 0;
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| 387 | static wolfSSL_Mutex ServerListMutex;
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| 388 |
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| 389 |
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| 390 | /* Session Hash Table, mutex, and count */
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| 391 | static SnifferSession* SessionTable[HASH_SIZE];
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| 392 | static wolfSSL_Mutex SessionMutex;
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| 393 | static int SessionCount = 0;
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| 394 |
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| 395 | /* Recovery of missed data switches and stats */
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| 396 | static wolfSSL_Mutex RecoveryMutex; /* for stats */
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| 397 | static int RecoveryEnabled = 0; /* global switch */
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| 398 | static int MaxRecoveryMemory = -1; /* per session max recovery memory */
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| 399 | static word32 MissedDataSessions = 0; /* # of sessions with missed data */
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| 400 |
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| 401 |
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| 402 | static void UpdateMissedDataSessions(void)
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| 403 | {
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| 404 | wc_LockMutex(&RecoveryMutex);
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| 405 | MissedDataSessions += 1;
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| 406 | wc_UnLockMutex(&RecoveryMutex);
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| 407 | }
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| 408 |
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| 409 |
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| 410 | /* Initialize overall Sniffer */
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| 411 | void ssl_InitSniffer(void)
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| 412 | {
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| 413 | wolfSSL_Init();
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| 414 | wc_InitMutex(&ServerListMutex);
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| 415 | wc_InitMutex(&SessionMutex);
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| 416 | wc_InitMutex(&RecoveryMutex);
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| 417 | }
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| 418 |
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| 419 |
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| 420 | #ifdef HAVE_SNI
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| 421 |
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| 422 | /* Free Named Key and the zero out the private key it holds */
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| 423 | static void FreeNamedKey(NamedKey* in)
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| 424 | {
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| 425 | if (in) {
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| 426 | if (in->key) {
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| 427 | ForceZero(in->key, in->keySz);
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| 428 | free(in->key);
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| 429 | }
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| 430 | free(in);
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| 431 | }
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| 432 | }
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| 433 |
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| 434 |
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| 435 | static void FreeNamedKeyList(NamedKey* in)
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| 436 | {
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| 437 | NamedKey* next;
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| 438 |
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| 439 | while (in) {
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| 440 | next = in->next;
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| 441 | FreeNamedKey(in);
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| 442 | in = next;
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| 443 | }
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| 444 | }
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| 445 |
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| 446 | #endif
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| 447 |
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| 448 |
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| 449 | /* Free Sniffer Server's resources/self */
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| 450 | static void FreeSnifferServer(SnifferServer* srv)
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| 451 | {
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| 452 | if (srv) {
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| 453 | #ifdef HAVE_SNI
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| 454 | wc_LockMutex(&srv->namedKeysMutex);
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| 455 | FreeNamedKeyList(srv->namedKeys);
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| 456 | wc_UnLockMutex(&srv->namedKeysMutex);
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| 457 | wc_FreeMutex(&srv->namedKeysMutex);
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| 458 | #endif
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| 459 | SSL_CTX_free(srv->ctx);
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| 460 | }
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| 461 | free(srv);
|
---|
| 462 | }
|
---|
| 463 |
|
---|
| 464 |
|
---|
| 465 | /* free PacketBuffer's resources/self */
|
---|
| 466 | static void FreePacketBuffer(PacketBuffer* del)
|
---|
| 467 | {
|
---|
| 468 | if (del) {
|
---|
| 469 | free(del->data);
|
---|
| 470 | free(del);
|
---|
| 471 | }
|
---|
| 472 | }
|
---|
| 473 |
|
---|
| 474 |
|
---|
| 475 | /* remove PacketBuffer List */
|
---|
| 476 | static void FreePacketList(PacketBuffer* in)
|
---|
| 477 | {
|
---|
| 478 | if (in) {
|
---|
| 479 | PacketBuffer* del;
|
---|
| 480 | PacketBuffer* packet = in;
|
---|
| 481 |
|
---|
| 482 | while (packet) {
|
---|
| 483 | del = packet;
|
---|
| 484 | packet = packet->next;
|
---|
| 485 | FreePacketBuffer(del);
|
---|
| 486 | }
|
---|
| 487 | }
|
---|
| 488 | }
|
---|
| 489 |
|
---|
| 490 |
|
---|
| 491 | /* Free Sniffer Session's resources/self */
|
---|
| 492 | static void FreeSnifferSession(SnifferSession* session)
|
---|
| 493 | {
|
---|
| 494 | if (session) {
|
---|
| 495 | SSL_free(session->sslClient);
|
---|
| 496 | SSL_free(session->sslServer);
|
---|
| 497 |
|
---|
| 498 | FreePacketList(session->cliReassemblyList);
|
---|
| 499 | FreePacketList(session->srvReassemblyList);
|
---|
| 500 |
|
---|
| 501 | free(session->ticketID);
|
---|
| 502 | #ifdef HAVE_EXTENDED_MASTER
|
---|
| 503 | free(session->hash);
|
---|
| 504 | #endif
|
---|
| 505 | }
|
---|
| 506 | free(session);
|
---|
| 507 | }
|
---|
| 508 |
|
---|
| 509 |
|
---|
| 510 | /* Free overall Sniffer */
|
---|
| 511 | void ssl_FreeSniffer(void)
|
---|
| 512 | {
|
---|
| 513 | SnifferServer* srv;
|
---|
| 514 | SnifferServer* removeServer;
|
---|
| 515 | SnifferSession* session;
|
---|
| 516 | SnifferSession* removeSession;
|
---|
| 517 | int i;
|
---|
| 518 |
|
---|
| 519 | wc_LockMutex(&ServerListMutex);
|
---|
| 520 | wc_LockMutex(&SessionMutex);
|
---|
| 521 |
|
---|
| 522 | srv = ServerList;
|
---|
| 523 | while (srv) {
|
---|
| 524 | removeServer = srv;
|
---|
| 525 | srv = srv->next;
|
---|
| 526 | FreeSnifferServer(removeServer);
|
---|
| 527 | }
|
---|
| 528 |
|
---|
| 529 | for (i = 0; i < HASH_SIZE; i++) {
|
---|
| 530 | session = SessionTable[i];
|
---|
| 531 | while (session) {
|
---|
| 532 | removeSession = session;
|
---|
| 533 | session = session->next;
|
---|
| 534 | FreeSnifferSession(removeSession);
|
---|
| 535 | }
|
---|
| 536 | }
|
---|
| 537 |
|
---|
| 538 | wc_UnLockMutex(&SessionMutex);
|
---|
| 539 | wc_UnLockMutex(&ServerListMutex);
|
---|
| 540 |
|
---|
| 541 | wc_FreeMutex(&RecoveryMutex);
|
---|
| 542 | wc_FreeMutex(&SessionMutex);
|
---|
| 543 | wc_FreeMutex(&ServerListMutex);
|
---|
| 544 |
|
---|
| 545 | if (TraceFile) {
|
---|
| 546 | TraceOn = 0;
|
---|
| 547 | fclose(TraceFile);
|
---|
| 548 | TraceFile = NULL;
|
---|
| 549 | }
|
---|
| 550 |
|
---|
| 551 | wolfSSL_Cleanup();
|
---|
| 552 | }
|
---|
| 553 |
|
---|
| 554 |
|
---|
| 555 | #ifdef HAVE_EXTENDED_MASTER
|
---|
| 556 |
|
---|
| 557 | static int HashInit(HsHashes* hash)
|
---|
| 558 | {
|
---|
| 559 | int ret = 0;
|
---|
| 560 |
|
---|
| 561 | XMEMSET(hash, 0, sizeof(HsHashes));
|
---|
| 562 |
|
---|
| 563 | #ifndef NO_OLD_TLS
|
---|
| 564 | #ifndef NO_SHA
|
---|
| 565 | if (ret == 0)
|
---|
| 566 | ret = wc_InitSha(&hash->hashSha);
|
---|
| 567 | #endif
|
---|
| 568 | #ifndef NO_MD5
|
---|
| 569 | if (ret == 0) {
|
---|
| 570 | ret = wc_InitMd5(&hash->hashMd5);
|
---|
| 571 | }
|
---|
| 572 | #endif
|
---|
| 573 | #endif
|
---|
| 574 | #ifndef NO_SHA256
|
---|
| 575 | if (ret == 0)
|
---|
| 576 | ret = wc_InitSha256(&hash->hashSha256);
|
---|
| 577 | #endif
|
---|
| 578 | #ifdef WOLFSSL_SHA384
|
---|
| 579 | if (ret == 0)
|
---|
| 580 | ret = wc_InitSha384(&hash->hashSha384);
|
---|
| 581 | #endif
|
---|
| 582 |
|
---|
| 583 | return ret;
|
---|
| 584 | }
|
---|
| 585 |
|
---|
| 586 |
|
---|
| 587 | static int HashUpdate(HsHashes* hash, const byte* input, int sz)
|
---|
| 588 | {
|
---|
| 589 | int ret = 0;
|
---|
| 590 |
|
---|
| 591 | input -= HANDSHAKE_HEADER_SZ;
|
---|
| 592 | sz += HANDSHAKE_HEADER_SZ;
|
---|
| 593 |
|
---|
| 594 | #ifndef NO_OLD_TLS
|
---|
| 595 | #ifndef NO_SHA
|
---|
| 596 | if (ret == 0)
|
---|
| 597 | ret = wc_ShaUpdate(&hash->hashSha, input, sz);
|
---|
| 598 | #endif
|
---|
| 599 | #ifndef NO_MD5
|
---|
| 600 | if (ret == 0) {
|
---|
| 601 | ret = wc_Md5Update(&hash->hashMd5, input, sz);
|
---|
| 602 | }
|
---|
| 603 | #endif
|
---|
| 604 | #endif
|
---|
| 605 | #ifndef NO_SHA256
|
---|
| 606 | if (ret == 0)
|
---|
| 607 | ret = wc_Sha256Update(&hash->hashSha256, input, sz);
|
---|
| 608 | #endif
|
---|
| 609 | #ifdef WOLFSSL_SHA384
|
---|
| 610 | if (ret == 0)
|
---|
| 611 | ret = wc_Sha384Update(&hash->hashSha384, input, sz);
|
---|
| 612 | #endif
|
---|
| 613 |
|
---|
| 614 | return ret;
|
---|
| 615 | }
|
---|
| 616 |
|
---|
| 617 |
|
---|
| 618 | static int HashCopy(HS_Hashes* d, HsHashes* s)
|
---|
| 619 | {
|
---|
| 620 | #ifndef NO_OLD_TLS
|
---|
| 621 | #ifndef NO_SHA
|
---|
| 622 | XMEMCPY(&d->hashSha, &s->hashSha, sizeof(wc_Sha));
|
---|
| 623 | #endif
|
---|
| 624 | #ifndef NO_MD5
|
---|
| 625 | XMEMCPY(&d->hashMd5, &s->hashMd5, sizeof(wc_Md5));
|
---|
| 626 | #endif
|
---|
| 627 | #endif
|
---|
| 628 |
|
---|
| 629 | #ifndef NO_SHA256
|
---|
| 630 | XMEMCPY(&d->hashSha256, &s->hashSha256, sizeof(wc_Sha256));
|
---|
| 631 | #endif
|
---|
| 632 | #ifdef WOLFSSL_SHA384
|
---|
| 633 | XMEMCPY(&d->hashSha384, &s->hashSha384, sizeof(wc_Sha384));
|
---|
| 634 | #endif
|
---|
| 635 |
|
---|
| 636 | return 0;
|
---|
| 637 | }
|
---|
| 638 |
|
---|
| 639 | #endif
|
---|
| 640 |
|
---|
| 641 |
|
---|
| 642 | /* Initialize a SnifferServer */
|
---|
| 643 | static void InitSnifferServer(SnifferServer* sniffer)
|
---|
| 644 | {
|
---|
| 645 | sniffer->ctx = 0;
|
---|
| 646 | XMEMSET(sniffer->address, 0, MAX_SERVER_ADDRESS);
|
---|
| 647 | sniffer->server = 0;
|
---|
| 648 | sniffer->port = 0;
|
---|
| 649 | #ifdef HAVE_SNI
|
---|
| 650 | sniffer->namedKeys = 0;
|
---|
| 651 | wc_InitMutex(&sniffer->namedKeysMutex);
|
---|
| 652 | #endif
|
---|
| 653 | sniffer->next = 0;
|
---|
| 654 | }
|
---|
| 655 |
|
---|
| 656 |
|
---|
| 657 | /* Initialize session flags */
|
---|
| 658 | static void InitFlags(Flags* flags)
|
---|
| 659 | {
|
---|
| 660 | flags->side = 0;
|
---|
| 661 | flags->serverCipherOn = 0;
|
---|
| 662 | flags->clientCipherOn = 0;
|
---|
| 663 | flags->resuming = 0;
|
---|
| 664 | flags->cached = 0;
|
---|
| 665 | flags->clientHello = 0;
|
---|
| 666 | flags->finCount = 0;
|
---|
| 667 | flags->fatalError = 0;
|
---|
| 668 | flags->cliAckFault = 0;
|
---|
| 669 | flags->srvAckFault = 0;
|
---|
| 670 | flags->cliSkipPartial = 0;
|
---|
| 671 | flags->srvSkipPartial = 0;
|
---|
| 672 | #ifdef HAVE_EXTENDED_MASTER
|
---|
| 673 | flags->expectEms = 0;
|
---|
| 674 | #endif
|
---|
| 675 | }
|
---|
| 676 |
|
---|
| 677 |
|
---|
| 678 | /* Initialize FIN Capture */
|
---|
| 679 | static void InitFinCapture(FinCaputre* cap)
|
---|
| 680 | {
|
---|
| 681 | cap->cliFinSeq = 0;
|
---|
| 682 | cap->srvFinSeq = 0;
|
---|
| 683 | cap->cliCounted = 0;
|
---|
| 684 | cap->srvCounted = 0;
|
---|
| 685 | }
|
---|
| 686 |
|
---|
| 687 |
|
---|
| 688 | /* Initialize a Sniffer Session */
|
---|
| 689 | static void InitSession(SnifferSession* session)
|
---|
| 690 | {
|
---|
| 691 | session->context = 0;
|
---|
| 692 | session->sslServer = 0;
|
---|
| 693 | session->sslClient = 0;
|
---|
| 694 | session->server = 0;
|
---|
| 695 | session->client = 0;
|
---|
| 696 | session->srvPort = 0;
|
---|
| 697 | session->cliPort = 0;
|
---|
| 698 | session->cliSeqStart = 0;
|
---|
| 699 | session->srvSeqStart = 0;
|
---|
| 700 | session->cliExpected = 0;
|
---|
| 701 | session->srvExpected = 0;
|
---|
| 702 | session->lastUsed = 0;
|
---|
| 703 | session->cliReassemblyList = 0;
|
---|
| 704 | session->srvReassemblyList = 0;
|
---|
| 705 | session->cliReassemblyMemory = 0;
|
---|
| 706 | session->srvReassemblyMemory = 0;
|
---|
| 707 | session->next = 0;
|
---|
| 708 | session->ticketID = 0;
|
---|
| 709 |
|
---|
| 710 | InitFlags(&session->flags);
|
---|
| 711 | InitFinCapture(&session->finCaputre);
|
---|
| 712 | #ifdef HAVE_EXTENDED_MASTER
|
---|
| 713 | session->hash = 0;
|
---|
| 714 | #endif
|
---|
| 715 | }
|
---|
| 716 |
|
---|
| 717 |
|
---|
| 718 | /* IP Info from IP Header */
|
---|
| 719 | typedef struct IpInfo {
|
---|
| 720 | int length; /* length of this header */
|
---|
| 721 | int total; /* total length of fragment */
|
---|
| 722 | word32 src; /* network order source address */
|
---|
| 723 | word32 dst; /* network order destination address */
|
---|
| 724 | } IpInfo;
|
---|
| 725 |
|
---|
| 726 |
|
---|
| 727 | /* TCP Info from TCP Header */
|
---|
| 728 | typedef struct TcpInfo {
|
---|
| 729 | int srcPort; /* source port */
|
---|
| 730 | int dstPort; /* source port */
|
---|
| 731 | int length; /* length of this header */
|
---|
| 732 | word32 sequence; /* sequence number */
|
---|
| 733 | word32 ackNumber; /* ack number */
|
---|
| 734 | byte fin; /* FIN set */
|
---|
| 735 | byte rst; /* RST set */
|
---|
| 736 | byte syn; /* SYN set */
|
---|
| 737 | byte ack; /* ACK set */
|
---|
| 738 | } TcpInfo;
|
---|
| 739 |
|
---|
| 740 |
|
---|
| 741 | /* Tcp Pseudo Header for Checksum calculation */
|
---|
| 742 | typedef struct TcpPseudoHdr {
|
---|
| 743 | word32 src; /* source address */
|
---|
| 744 | word32 dst; /* destination address */
|
---|
| 745 | byte rsv; /* reserved, always 0 */
|
---|
| 746 | byte protocol; /* IP protocol */
|
---|
| 747 | word16 length; /* tcp header length + data length (doesn't include */
|
---|
| 748 | /* pseudo header length) network order */
|
---|
| 749 | } TcpPseudoHdr;
|
---|
| 750 |
|
---|
| 751 |
|
---|
| 752 | /* Password Setting Callback */
|
---|
| 753 | static int SetPassword(char* passwd, int sz, int rw, void* userdata)
|
---|
| 754 | {
|
---|
| 755 | (void)rw;
|
---|
| 756 | XSTRNCPY(passwd, (const char*)userdata, sz);
|
---|
| 757 | return (int)XSTRLEN((const char*)userdata);
|
---|
| 758 | }
|
---|
| 759 |
|
---|
| 760 |
|
---|
| 761 | /* Ethernet Header */
|
---|
| 762 | typedef struct EthernetHdr {
|
---|
| 763 | byte dst[ETHER_IF_ADDR_LEN]; /* destination host address */
|
---|
| 764 | byte src[ETHER_IF_ADDR_LEN]; /* source host address */
|
---|
| 765 | word16 type; /* IP, ARP, etc */
|
---|
| 766 | } EthernetHdr;
|
---|
| 767 |
|
---|
| 768 |
|
---|
| 769 | /* IP Header */
|
---|
| 770 | typedef struct IpHdr {
|
---|
| 771 | byte ver_hl; /* version/header length */
|
---|
| 772 | byte tos; /* type of service */
|
---|
| 773 | word16 length; /* total length */
|
---|
| 774 | word16 id; /* identification */
|
---|
| 775 | word16 offset; /* fragment offset field */
|
---|
| 776 | byte ttl; /* time to live */
|
---|
| 777 | byte protocol; /* protocol */
|
---|
| 778 | word16 sum; /* checksum */
|
---|
| 779 | word32 src; /* source address */
|
---|
| 780 | word32 dst; /* destination address */
|
---|
| 781 | } IpHdr;
|
---|
| 782 |
|
---|
| 783 |
|
---|
| 784 | #define IP_HL(ip) ( (((ip)->ver_hl) & 0x0f) * 4)
|
---|
| 785 | #define IP_V(ip) ( ((ip)->ver_hl) >> 4)
|
---|
| 786 |
|
---|
| 787 | /* TCP Header */
|
---|
| 788 | typedef struct TcpHdr {
|
---|
| 789 | word16 srcPort; /* source port */
|
---|
| 790 | word16 dstPort; /* destination port */
|
---|
| 791 | word32 sequence; /* sequence number */
|
---|
| 792 | word32 ack; /* acknoledgment number */
|
---|
| 793 | byte offset; /* data offset, reserved */
|
---|
| 794 | byte flags; /* option flags */
|
---|
| 795 | word16 window; /* window */
|
---|
| 796 | word16 sum; /* checksum */
|
---|
| 797 | word16 urgent; /* urgent pointer */
|
---|
| 798 | } TcpHdr;
|
---|
| 799 |
|
---|
| 800 | #define TCP_LEN(tcp) ( (((tcp)->offset & 0xf0) >> 4) * 4)
|
---|
| 801 | #define TCP_FIN 0x01
|
---|
| 802 | #define TCP_SYN 0x02
|
---|
| 803 | #define TCP_RST 0x04
|
---|
| 804 | #define TCP_ACK 0x10
|
---|
| 805 |
|
---|
| 806 |
|
---|
| 807 |
|
---|
| 808 |
|
---|
| 809 |
|
---|
| 810 | /* Use platform specific GetError to write to tracfile if tracing */
|
---|
| 811 | static void Trace(int idx)
|
---|
| 812 | {
|
---|
| 813 | if (TraceOn) {
|
---|
| 814 | char myBuffer[MAX_ERROR_LEN];
|
---|
| 815 | GetError(idx, myBuffer);
|
---|
| 816 | fprintf(TraceFile, "\t%s\n", myBuffer);
|
---|
| 817 | #ifdef DEBUG_SNIFFER
|
---|
| 818 | fprintf(stderr, "\t%s\n", myBuffer);
|
---|
| 819 | #endif
|
---|
| 820 | }
|
---|
| 821 | }
|
---|
| 822 |
|
---|
| 823 |
|
---|
| 824 | /* Show TimeStamp for beginning of packet Trace */
|
---|
| 825 | static void TraceHeader(void)
|
---|
| 826 | {
|
---|
| 827 | if (TraceOn) {
|
---|
| 828 | time_t ticks = time(NULL);
|
---|
| 829 | fprintf(TraceFile, "\n%s", ctime(&ticks));
|
---|
| 830 | }
|
---|
| 831 | }
|
---|
| 832 |
|
---|
| 833 |
|
---|
| 834 | /* Show Set Server info for Trace */
|
---|
| 835 | static void TraceSetServer(const char* srv, int port, const char* keyFile)
|
---|
| 836 | {
|
---|
| 837 | if (TraceOn) {
|
---|
| 838 | fprintf(TraceFile, "\tTrying to install a new Sniffer Server with\n");
|
---|
| 839 | fprintf(TraceFile, "\tserver: %s, port: %d, keyFile: %s\n", srv, port,
|
---|
| 840 | keyFile);
|
---|
| 841 | }
|
---|
| 842 | }
|
---|
| 843 |
|
---|
| 844 |
|
---|
| 845 | #ifdef HAVE_SNI
|
---|
| 846 |
|
---|
| 847 | /* Show Set Named Server info for Trace */
|
---|
| 848 | static void TraceSetNamedServer(const char* name,
|
---|
| 849 | const char* srv, int port, const char* keyFile)
|
---|
| 850 | {
|
---|
| 851 | if (TraceOn) {
|
---|
| 852 | fprintf(TraceFile, "\tTrying to install a new Sniffer Server with\n");
|
---|
| 853 | fprintf(TraceFile, "\tname: %s, server: %s, port: %d, keyFile: %s\n",
|
---|
| 854 | name, srv, port, keyFile);
|
---|
| 855 | }
|
---|
| 856 | }
|
---|
| 857 |
|
---|
| 858 | #endif
|
---|
| 859 |
|
---|
| 860 |
|
---|
| 861 | /* Trace got packet number */
|
---|
| 862 | static void TracePacket(void)
|
---|
| 863 | {
|
---|
| 864 | if (TraceOn) {
|
---|
| 865 | static word32 packetNumber = 0;
|
---|
| 866 | fprintf(TraceFile, "\tGot a Packet to decode, packet %u\n",
|
---|
| 867 | ++packetNumber);
|
---|
| 868 | }
|
---|
| 869 | }
|
---|
| 870 |
|
---|
| 871 |
|
---|
| 872 | /* Convert network byte order address into human readable */
|
---|
| 873 | static char* IpToS(word32 addr, char* str)
|
---|
| 874 | {
|
---|
| 875 | byte* p = (byte*)&addr;
|
---|
| 876 |
|
---|
| 877 | SNPRINTF(str, TRACE_MSG_SZ, "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
|
---|
| 878 |
|
---|
| 879 | return str;
|
---|
| 880 | }
|
---|
| 881 |
|
---|
| 882 |
|
---|
| 883 | /* Show destination and source address from Ip Hdr for packet Trace */
|
---|
| 884 | static void TraceIP(IpHdr* iphdr)
|
---|
| 885 | {
|
---|
| 886 | if (TraceOn) {
|
---|
| 887 | char src[TRACE_MSG_SZ];
|
---|
| 888 | char dst[TRACE_MSG_SZ];
|
---|
| 889 | fprintf(TraceFile, "\tdst:%s src:%s\n", IpToS(iphdr->dst, dst),
|
---|
| 890 | IpToS(iphdr->src, src));
|
---|
| 891 | }
|
---|
| 892 | }
|
---|
| 893 |
|
---|
| 894 |
|
---|
| 895 | /* Show destination and source port from Tcp Hdr for packet Trace */
|
---|
| 896 | static void TraceTcp(TcpHdr* tcphdr)
|
---|
| 897 | {
|
---|
| 898 | if (TraceOn) {
|
---|
| 899 | fprintf(TraceFile, "\tdstPort:%u srcPort:%u\n", ntohs(tcphdr->dstPort),
|
---|
| 900 | ntohs(tcphdr->srcPort));
|
---|
| 901 | }
|
---|
| 902 | }
|
---|
| 903 |
|
---|
| 904 |
|
---|
| 905 | /* Show sequence and payload length for Trace */
|
---|
| 906 | static void TraceSequence(word32 seq, int len)
|
---|
| 907 | {
|
---|
| 908 | if (TraceOn) {
|
---|
| 909 | fprintf(TraceFile, "\tSequence:%u, payload length:%d\n", seq, len);
|
---|
| 910 | }
|
---|
| 911 | }
|
---|
| 912 |
|
---|
| 913 |
|
---|
| 914 | /* Show sequence and payload length for Trace */
|
---|
| 915 | static void TraceAck(word32 ack, word32 expected)
|
---|
| 916 | {
|
---|
| 917 | if (TraceOn) {
|
---|
| 918 | fprintf(TraceFile, "\tAck:%u Expected:%u\n", ack, expected);
|
---|
| 919 | }
|
---|
| 920 | }
|
---|
| 921 |
|
---|
| 922 |
|
---|
| 923 | /* Show relative expected and relative received sequences */
|
---|
| 924 | static void TraceRelativeSequence(word32 expected, word32 got)
|
---|
| 925 | {
|
---|
| 926 | if (TraceOn) {
|
---|
| 927 | fprintf(TraceFile, "\tExpected sequence:%u, received sequence:%u\n",
|
---|
| 928 | expected, got);
|
---|
| 929 | }
|
---|
| 930 | }
|
---|
| 931 |
|
---|
| 932 |
|
---|
| 933 | /* Show server sequence startup from SYN */
|
---|
| 934 | static void TraceServerSyn(word32 seq)
|
---|
| 935 | {
|
---|
| 936 | if (TraceOn) {
|
---|
| 937 | fprintf(TraceFile, "\tServer SYN, Sequence Start:%u\n", seq);
|
---|
| 938 | }
|
---|
| 939 | }
|
---|
| 940 |
|
---|
| 941 |
|
---|
| 942 | /* Show client sequence startup from SYN */
|
---|
| 943 | static void TraceClientSyn(word32 seq)
|
---|
| 944 | {
|
---|
| 945 | if (TraceOn) {
|
---|
| 946 | fprintf(TraceFile, "\tClient SYN, Sequence Start:%u\n", seq);
|
---|
| 947 | }
|
---|
| 948 | }
|
---|
| 949 |
|
---|
| 950 |
|
---|
| 951 | /* Show client FIN capture */
|
---|
| 952 | static void TraceClientFin(word32 finSeq, word32 relSeq)
|
---|
| 953 | {
|
---|
| 954 | if (TraceOn) {
|
---|
| 955 | fprintf(TraceFile, "\tClient FIN capture:%u, current SEQ:%u\n",
|
---|
| 956 | finSeq, relSeq);
|
---|
| 957 | }
|
---|
| 958 | }
|
---|
| 959 |
|
---|
| 960 |
|
---|
| 961 | /* Show server FIN capture */
|
---|
| 962 | static void TraceServerFin(word32 finSeq, word32 relSeq)
|
---|
| 963 | {
|
---|
| 964 | if (TraceOn) {
|
---|
| 965 | fprintf(TraceFile, "\tServer FIN capture:%u, current SEQ:%u\n",
|
---|
| 966 | finSeq, relSeq);
|
---|
| 967 | }
|
---|
| 968 | }
|
---|
| 969 |
|
---|
| 970 |
|
---|
| 971 | /* Show number of SSL data bytes decoded, could be 0 (ok) */
|
---|
| 972 | static void TraceGotData(int bytes)
|
---|
| 973 | {
|
---|
| 974 | if (TraceOn) {
|
---|
| 975 | fprintf(TraceFile, "\t%d bytes of SSL App data processed\n", bytes);
|
---|
| 976 | }
|
---|
| 977 | }
|
---|
| 978 |
|
---|
| 979 |
|
---|
| 980 | /* Show bytes added to old SSL App data */
|
---|
| 981 | static void TraceAddedData(int newBytes, int existingBytes)
|
---|
| 982 | {
|
---|
| 983 | if (TraceOn) {
|
---|
| 984 | fprintf(TraceFile,
|
---|
| 985 | "\t%d bytes added to %d existing bytes in User Buffer\n",
|
---|
| 986 | newBytes, existingBytes);
|
---|
| 987 | }
|
---|
| 988 | }
|
---|
| 989 |
|
---|
| 990 |
|
---|
| 991 | /* Show Stale Session */
|
---|
| 992 | static void TraceStaleSession(void)
|
---|
| 993 | {
|
---|
| 994 | if (TraceOn) {
|
---|
| 995 | fprintf(TraceFile, "\tFound a stale session\n");
|
---|
| 996 | }
|
---|
| 997 | }
|
---|
| 998 |
|
---|
| 999 |
|
---|
| 1000 | /* Show Finding Stale Sessions */
|
---|
| 1001 | static void TraceFindingStale(void)
|
---|
| 1002 | {
|
---|
| 1003 | if (TraceOn) {
|
---|
| 1004 | fprintf(TraceFile, "\tTrying to find Stale Sessions\n");
|
---|
| 1005 | }
|
---|
| 1006 | }
|
---|
| 1007 |
|
---|
| 1008 |
|
---|
| 1009 | /* Show Removed Session */
|
---|
| 1010 | static void TraceRemovedSession(void)
|
---|
| 1011 | {
|
---|
| 1012 | if (TraceOn) {
|
---|
| 1013 | fprintf(TraceFile, "\tRemoved it\n");
|
---|
| 1014 | }
|
---|
| 1015 | }
|
---|
| 1016 |
|
---|
| 1017 |
|
---|
| 1018 | /* Set user error string */
|
---|
| 1019 | static void SetError(int idx, char* error, SnifferSession* session, int fatal)
|
---|
| 1020 | {
|
---|
| 1021 | GetError(idx, error);
|
---|
| 1022 | Trace(idx);
|
---|
| 1023 | if (session && fatal == FATAL_ERROR_STATE)
|
---|
| 1024 | session->flags.fatalError = 1;
|
---|
| 1025 | }
|
---|
| 1026 |
|
---|
| 1027 |
|
---|
| 1028 | /* See if this IPV4 network order address has been registered */
|
---|
| 1029 | /* return 1 is true, 0 is false */
|
---|
| 1030 | static int IsServerRegistered(word32 addr)
|
---|
| 1031 | {
|
---|
| 1032 | int ret = 0; /* false */
|
---|
| 1033 | SnifferServer* sniffer;
|
---|
| 1034 |
|
---|
| 1035 | wc_LockMutex(&ServerListMutex);
|
---|
| 1036 |
|
---|
| 1037 | sniffer = ServerList;
|
---|
| 1038 | while (sniffer) {
|
---|
| 1039 | if (sniffer->server == addr) {
|
---|
| 1040 | ret = 1;
|
---|
| 1041 | break;
|
---|
| 1042 | }
|
---|
| 1043 | sniffer = sniffer->next;
|
---|
| 1044 | }
|
---|
| 1045 |
|
---|
| 1046 | wc_UnLockMutex(&ServerListMutex);
|
---|
| 1047 |
|
---|
| 1048 | return ret;
|
---|
| 1049 | }
|
---|
| 1050 |
|
---|
| 1051 |
|
---|
| 1052 | /* See if this port has been registered to watch */
|
---|
| 1053 | /* return 1 is true, 0 is false */
|
---|
| 1054 | static int IsPortRegistered(word32 port)
|
---|
| 1055 | {
|
---|
| 1056 | int ret = 0; /* false */
|
---|
| 1057 | SnifferServer* sniffer;
|
---|
| 1058 |
|
---|
| 1059 | wc_LockMutex(&ServerListMutex);
|
---|
| 1060 |
|
---|
| 1061 | sniffer = ServerList;
|
---|
| 1062 | while (sniffer) {
|
---|
| 1063 | if (sniffer->port == (int)port) {
|
---|
| 1064 | ret = 1;
|
---|
| 1065 | break;
|
---|
| 1066 | }
|
---|
| 1067 | sniffer = sniffer->next;
|
---|
| 1068 | }
|
---|
| 1069 |
|
---|
| 1070 | wc_UnLockMutex(&ServerListMutex);
|
---|
| 1071 |
|
---|
| 1072 | return ret;
|
---|
| 1073 | }
|
---|
| 1074 |
|
---|
| 1075 |
|
---|
| 1076 | /* Get SnifferServer from IP and Port */
|
---|
| 1077 | static SnifferServer* GetSnifferServer(IpInfo* ipInfo, TcpInfo* tcpInfo)
|
---|
| 1078 | {
|
---|
| 1079 | SnifferServer* sniffer;
|
---|
| 1080 |
|
---|
| 1081 | wc_LockMutex(&ServerListMutex);
|
---|
| 1082 |
|
---|
| 1083 | sniffer = ServerList;
|
---|
| 1084 | while (sniffer) {
|
---|
| 1085 | if (sniffer->port == tcpInfo->srcPort && sniffer->server == ipInfo->src)
|
---|
| 1086 | break;
|
---|
| 1087 | if (sniffer->port == tcpInfo->dstPort && sniffer->server == ipInfo->dst)
|
---|
| 1088 | break;
|
---|
| 1089 | sniffer = sniffer->next;
|
---|
| 1090 | }
|
---|
| 1091 |
|
---|
| 1092 | wc_UnLockMutex(&ServerListMutex);
|
---|
| 1093 |
|
---|
| 1094 | return sniffer;
|
---|
| 1095 | }
|
---|
| 1096 |
|
---|
| 1097 |
|
---|
| 1098 | /* Hash the Session Info, return hash row */
|
---|
| 1099 | static word32 SessionHash(IpInfo* ipInfo, TcpInfo* tcpInfo)
|
---|
| 1100 | {
|
---|
| 1101 | word32 hash = ipInfo->src * ipInfo->dst;
|
---|
| 1102 | hash *= tcpInfo->srcPort * tcpInfo->dstPort;
|
---|
| 1103 |
|
---|
| 1104 | return hash % HASH_SIZE;
|
---|
| 1105 | }
|
---|
| 1106 |
|
---|
| 1107 |
|
---|
| 1108 | /* Get Exisiting SnifferSession from IP and Port */
|
---|
| 1109 | static SnifferSession* GetSnifferSession(IpInfo* ipInfo, TcpInfo* tcpInfo)
|
---|
| 1110 | {
|
---|
| 1111 | SnifferSession* session;
|
---|
| 1112 | time_t currTime = time(NULL);
|
---|
| 1113 | word32 row = SessionHash(ipInfo, tcpInfo);
|
---|
| 1114 |
|
---|
| 1115 | assert(row <= HASH_SIZE);
|
---|
| 1116 |
|
---|
| 1117 | wc_LockMutex(&SessionMutex);
|
---|
| 1118 |
|
---|
| 1119 | session = SessionTable[row];
|
---|
| 1120 | while (session) {
|
---|
| 1121 | if (session->server == ipInfo->src && session->client == ipInfo->dst &&
|
---|
| 1122 | session->srvPort == tcpInfo->srcPort &&
|
---|
| 1123 | session->cliPort == tcpInfo->dstPort)
|
---|
| 1124 | break;
|
---|
| 1125 | if (session->client == ipInfo->src && session->server == ipInfo->dst &&
|
---|
| 1126 | session->cliPort == tcpInfo->srcPort &&
|
---|
| 1127 | session->srvPort == tcpInfo->dstPort)
|
---|
| 1128 | break;
|
---|
| 1129 |
|
---|
| 1130 | session = session->next;
|
---|
| 1131 | }
|
---|
| 1132 |
|
---|
| 1133 | if (session)
|
---|
| 1134 | session->lastUsed= currTime; /* keep session alive, remove stale will */
|
---|
| 1135 | /* leave alone */
|
---|
| 1136 | wc_UnLockMutex(&SessionMutex);
|
---|
| 1137 |
|
---|
| 1138 | /* determine side */
|
---|
| 1139 | if (session) {
|
---|
| 1140 | if (ipInfo->dst == session->context->server &&
|
---|
| 1141 | tcpInfo->dstPort == session->context->port)
|
---|
| 1142 | session->flags.side = WOLFSSL_SERVER_END;
|
---|
| 1143 | else
|
---|
| 1144 | session->flags.side = WOLFSSL_CLIENT_END;
|
---|
| 1145 | }
|
---|
| 1146 |
|
---|
| 1147 | return session;
|
---|
| 1148 | }
|
---|
| 1149 |
|
---|
| 1150 |
|
---|
| 1151 | #ifdef HAVE_SNI
|
---|
| 1152 |
|
---|
| 1153 | static int LoadKeyFile(byte** keyBuf, word32* keyBufSz,
|
---|
| 1154 | const char* keyFile, int typeKey,
|
---|
| 1155 | const char* password)
|
---|
| 1156 | {
|
---|
| 1157 | byte* loadBuf;
|
---|
| 1158 | long fileSz = 0;
|
---|
| 1159 | XFILE file;
|
---|
| 1160 | int ret;
|
---|
| 1161 |
|
---|
| 1162 | if (keyBuf == NULL || keyBufSz == NULL || keyFile == NULL) {
|
---|
| 1163 | return -1;
|
---|
| 1164 | }
|
---|
| 1165 |
|
---|
| 1166 | file = XFOPEN(keyFile, "rb");
|
---|
| 1167 | if (file == XBADFILE) return -1;
|
---|
| 1168 | XFSEEK(file, 0, XSEEK_END);
|
---|
| 1169 | fileSz = XFTELL(file);
|
---|
| 1170 | XREWIND(file);
|
---|
| 1171 |
|
---|
| 1172 | loadBuf = (byte*)malloc(fileSz);
|
---|
| 1173 | if (loadBuf == NULL) {
|
---|
| 1174 | XFCLOSE(file);
|
---|
| 1175 | return -1;
|
---|
| 1176 | }
|
---|
| 1177 |
|
---|
| 1178 | ret = (int)XFREAD(loadBuf, 1, fileSz, file);
|
---|
| 1179 | XFCLOSE(file);
|
---|
| 1180 |
|
---|
| 1181 | if (ret != fileSz) {
|
---|
| 1182 | free(loadBuf);
|
---|
| 1183 | return -1;
|
---|
| 1184 | }
|
---|
| 1185 |
|
---|
| 1186 | if (typeKey == WOLFSSL_FILETYPE_PEM) {
|
---|
| 1187 | byte* saveBuf = (byte*)malloc(fileSz);
|
---|
| 1188 | int saveBufSz = 0;
|
---|
| 1189 |
|
---|
| 1190 | ret = -1;
|
---|
| 1191 | if (saveBuf != NULL) {
|
---|
| 1192 | saveBufSz = wolfSSL_KeyPemToDer(loadBuf, (int)fileSz,
|
---|
| 1193 | saveBuf, (int)fileSz, password);
|
---|
| 1194 | if (saveBufSz < 0) {
|
---|
| 1195 | saveBufSz = 0;
|
---|
| 1196 | free(saveBuf);
|
---|
| 1197 | saveBuf = NULL;
|
---|
| 1198 | }
|
---|
| 1199 | else
|
---|
| 1200 | ret = 0;
|
---|
| 1201 | }
|
---|
| 1202 |
|
---|
| 1203 | ForceZero(loadBuf, (word32)fileSz);
|
---|
| 1204 | free(loadBuf);
|
---|
| 1205 |
|
---|
| 1206 | if (saveBuf) {
|
---|
| 1207 | *keyBuf = saveBuf;
|
---|
| 1208 | *keyBufSz = (word32)saveBufSz;
|
---|
| 1209 | }
|
---|
| 1210 | }
|
---|
| 1211 | else {
|
---|
| 1212 | *keyBuf = loadBuf;
|
---|
| 1213 | *keyBufSz = (word32)fileSz;
|
---|
| 1214 | }
|
---|
| 1215 |
|
---|
| 1216 | if (ret < 0) {
|
---|
| 1217 | return -1;
|
---|
| 1218 | }
|
---|
| 1219 |
|
---|
| 1220 | return ret;
|
---|
| 1221 | }
|
---|
| 1222 |
|
---|
| 1223 | #endif
|
---|
| 1224 |
|
---|
| 1225 |
|
---|
| 1226 | static int SetNamedPrivateKey(const char* name, const char* address, int port,
|
---|
| 1227 | const char* keyFile, int typeKey, const char* password, char* error)
|
---|
| 1228 | {
|
---|
| 1229 | SnifferServer* sniffer;
|
---|
| 1230 | int ret;
|
---|
| 1231 | int type = (typeKey == FILETYPE_PEM) ? WOLFSSL_FILETYPE_PEM :
|
---|
| 1232 | WOLFSSL_FILETYPE_ASN1;
|
---|
| 1233 | int isNew = 0;
|
---|
| 1234 | word32 serverIp;
|
---|
| 1235 |
|
---|
| 1236 | #ifdef HAVE_SNI
|
---|
| 1237 | NamedKey* namedKey = NULL;
|
---|
| 1238 | #endif
|
---|
| 1239 |
|
---|
| 1240 | (void)name;
|
---|
| 1241 | #ifdef HAVE_SNI
|
---|
| 1242 | if (name != NULL) {
|
---|
| 1243 | namedKey = (NamedKey*)malloc(sizeof(NamedKey));
|
---|
| 1244 | if (namedKey == NULL) {
|
---|
| 1245 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
| 1246 | return -1;
|
---|
| 1247 | }
|
---|
| 1248 | XMEMSET(namedKey, 0, sizeof(NamedKey));
|
---|
| 1249 |
|
---|
| 1250 | namedKey->nameSz = (word32)XSTRLEN(name);
|
---|
| 1251 | XSTRNCPY(namedKey->name, name, sizeof(namedKey->name));
|
---|
| 1252 | if (namedKey->nameSz >= sizeof(namedKey->name)) {
|
---|
| 1253 | namedKey->nameSz = sizeof(namedKey->name) - 1;
|
---|
| 1254 | namedKey->name[namedKey->nameSz] = '\0';
|
---|
| 1255 | }
|
---|
| 1256 |
|
---|
| 1257 | ret = LoadKeyFile(&namedKey->key, &namedKey->keySz,
|
---|
| 1258 | keyFile, type, password);
|
---|
| 1259 | if (ret < 0) {
|
---|
| 1260 | SetError(KEY_FILE_STR, error, NULL, 0);
|
---|
| 1261 | FreeNamedKey(namedKey);
|
---|
| 1262 | return -1;
|
---|
| 1263 | }
|
---|
| 1264 | }
|
---|
| 1265 | #endif
|
---|
| 1266 |
|
---|
| 1267 | serverIp = inet_addr(address);
|
---|
| 1268 | sniffer = ServerList;
|
---|
| 1269 | while (sniffer != NULL &&
|
---|
| 1270 | (sniffer->server != serverIp || sniffer->port != port)) {
|
---|
| 1271 | sniffer = sniffer->next;
|
---|
| 1272 | }
|
---|
| 1273 |
|
---|
| 1274 | if (sniffer == NULL) {
|
---|
| 1275 | isNew = 1;
|
---|
| 1276 | sniffer = (SnifferServer*)malloc(sizeof(SnifferServer));
|
---|
| 1277 | if (sniffer == NULL) {
|
---|
| 1278 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
| 1279 | #ifdef HAVE_SNI
|
---|
| 1280 | FreeNamedKey(namedKey);
|
---|
| 1281 | #endif
|
---|
| 1282 | return -1;
|
---|
| 1283 | }
|
---|
| 1284 | InitSnifferServer(sniffer);
|
---|
| 1285 |
|
---|
| 1286 | XSTRNCPY(sniffer->address, address, MAX_SERVER_ADDRESS-1);
|
---|
| 1287 | sniffer->address[MAX_SERVER_ADDRESS-1] = '\0';
|
---|
| 1288 | sniffer->server = serverIp;
|
---|
| 1289 | sniffer->port = port;
|
---|
| 1290 |
|
---|
| 1291 | sniffer->ctx = SSL_CTX_new(TLSv1_client_method());
|
---|
| 1292 | if (!sniffer->ctx) {
|
---|
| 1293 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
| 1294 | #ifdef HAVE_SNI
|
---|
| 1295 | FreeNamedKey(namedKey);
|
---|
| 1296 | #endif
|
---|
| 1297 | FreeSnifferServer(sniffer);
|
---|
| 1298 | return -1;
|
---|
| 1299 | }
|
---|
| 1300 | }
|
---|
| 1301 |
|
---|
| 1302 | if (name == NULL) {
|
---|
| 1303 | if (password) {
|
---|
| 1304 | SSL_CTX_set_default_passwd_cb(sniffer->ctx, SetPassword);
|
---|
| 1305 | SSL_CTX_set_default_passwd_cb_userdata(
|
---|
| 1306 | sniffer->ctx, (void*)password);
|
---|
| 1307 | }
|
---|
| 1308 | ret = SSL_CTX_use_PrivateKey_file(sniffer->ctx, keyFile, type);
|
---|
| 1309 | if (ret != WOLFSSL_SUCCESS) {
|
---|
| 1310 | SetError(KEY_FILE_STR, error, NULL, 0);
|
---|
| 1311 | if (isNew)
|
---|
| 1312 | FreeSnifferServer(sniffer);
|
---|
| 1313 | return -1;
|
---|
| 1314 | }
|
---|
| 1315 | }
|
---|
| 1316 | #ifdef HAVE_SNI
|
---|
| 1317 | else {
|
---|
| 1318 | wc_LockMutex(&sniffer->namedKeysMutex);
|
---|
| 1319 | namedKey->next = sniffer->namedKeys;
|
---|
| 1320 | sniffer->namedKeys = namedKey;
|
---|
| 1321 | wc_UnLockMutex(&sniffer->namedKeysMutex);
|
---|
| 1322 | }
|
---|
| 1323 | #endif
|
---|
| 1324 |
|
---|
| 1325 | if (isNew) {
|
---|
| 1326 | sniffer->next = ServerList;
|
---|
| 1327 | ServerList = sniffer;
|
---|
| 1328 | }
|
---|
| 1329 |
|
---|
| 1330 | return 0;
|
---|
| 1331 | }
|
---|
| 1332 |
|
---|
| 1333 |
|
---|
| 1334 | #ifdef HAVE_SNI
|
---|
| 1335 |
|
---|
| 1336 | /* Sets the private key for a specific name, server and port */
|
---|
| 1337 | /* returns 0 on success, -1 on error */
|
---|
| 1338 | int ssl_SetNamedPrivateKey(const char* name,
|
---|
| 1339 | const char* address, int port,
|
---|
| 1340 | const char* keyFile, int typeKey,
|
---|
| 1341 | const char* password, char* error)
|
---|
| 1342 | {
|
---|
| 1343 | int ret;
|
---|
| 1344 |
|
---|
| 1345 | TraceHeader();
|
---|
| 1346 | TraceSetNamedServer(name, address, port, keyFile);
|
---|
| 1347 |
|
---|
| 1348 | wc_LockMutex(&ServerListMutex);
|
---|
| 1349 | ret = SetNamedPrivateKey(name, address, port, keyFile,
|
---|
| 1350 | typeKey, password, error);
|
---|
| 1351 | wc_UnLockMutex(&ServerListMutex);
|
---|
| 1352 |
|
---|
| 1353 | if (ret == 0)
|
---|
| 1354 | Trace(NEW_SERVER_STR);
|
---|
| 1355 |
|
---|
| 1356 | return ret;
|
---|
| 1357 | }
|
---|
| 1358 |
|
---|
| 1359 | #endif
|
---|
| 1360 |
|
---|
| 1361 |
|
---|
| 1362 | /* Sets the private key for a specific server and port */
|
---|
| 1363 | /* returns 0 on success, -1 on error */
|
---|
| 1364 | int ssl_SetPrivateKey(const char* address, int port, const char* keyFile,
|
---|
| 1365 | int typeKey, const char* password, char* error)
|
---|
| 1366 | {
|
---|
| 1367 | int ret;
|
---|
| 1368 |
|
---|
| 1369 | TraceHeader();
|
---|
| 1370 | TraceSetServer(address, port, keyFile);
|
---|
| 1371 |
|
---|
| 1372 | wc_LockMutex(&ServerListMutex);
|
---|
| 1373 | ret = SetNamedPrivateKey(NULL, address, port, keyFile,
|
---|
| 1374 | typeKey, password, error);
|
---|
| 1375 | wc_UnLockMutex(&ServerListMutex);
|
---|
| 1376 |
|
---|
| 1377 | if (ret == 0)
|
---|
| 1378 | Trace(NEW_SERVER_STR);
|
---|
| 1379 |
|
---|
| 1380 | return ret;
|
---|
| 1381 | }
|
---|
| 1382 |
|
---|
| 1383 |
|
---|
| 1384 | /* Check IP Header for IPV4, TCP, and a registered server address */
|
---|
| 1385 | /* returns 0 on success, -1 on error */
|
---|
| 1386 | static int CheckIpHdr(IpHdr* iphdr, IpInfo* info, int length, char* error)
|
---|
| 1387 | {
|
---|
| 1388 | int version = IP_V(iphdr);
|
---|
| 1389 |
|
---|
| 1390 | TraceIP(iphdr);
|
---|
| 1391 | Trace(IP_CHECK_STR);
|
---|
| 1392 |
|
---|
| 1393 | if (version != IPV4) {
|
---|
| 1394 | SetError(BAD_IPVER_STR, error, NULL, 0);
|
---|
| 1395 | return -1;
|
---|
| 1396 | }
|
---|
| 1397 |
|
---|
| 1398 | if (iphdr->protocol != TCP_PROTOCOL) {
|
---|
| 1399 | SetError(BAD_PROTO_STR, error, NULL, 0);
|
---|
| 1400 | return -1;
|
---|
| 1401 | }
|
---|
| 1402 |
|
---|
| 1403 | if (!IsServerRegistered(iphdr->src) && !IsServerRegistered(iphdr->dst)) {
|
---|
| 1404 | SetError(SERVER_NOT_REG_STR, error, NULL, 0);
|
---|
| 1405 | return -1;
|
---|
| 1406 | }
|
---|
| 1407 |
|
---|
| 1408 | info->length = IP_HL(iphdr);
|
---|
| 1409 | info->total = ntohs(iphdr->length);
|
---|
| 1410 | info->src = iphdr->src;
|
---|
| 1411 | info->dst = iphdr->dst;
|
---|
| 1412 |
|
---|
| 1413 | if (info->total == 0)
|
---|
| 1414 | info->total = length; /* reassembled may be off */
|
---|
| 1415 |
|
---|
| 1416 | return 0;
|
---|
| 1417 | }
|
---|
| 1418 |
|
---|
| 1419 |
|
---|
| 1420 | /* Check TCP Header for a registered port */
|
---|
| 1421 | /* returns 0 on success, -1 on error */
|
---|
| 1422 | static int CheckTcpHdr(TcpHdr* tcphdr, TcpInfo* info, char* error)
|
---|
| 1423 | {
|
---|
| 1424 | TraceTcp(tcphdr);
|
---|
| 1425 | Trace(TCP_CHECK_STR);
|
---|
| 1426 | info->srcPort = ntohs(tcphdr->srcPort);
|
---|
| 1427 | info->dstPort = ntohs(tcphdr->dstPort);
|
---|
| 1428 | info->length = TCP_LEN(tcphdr);
|
---|
| 1429 | info->sequence = ntohl(tcphdr->sequence);
|
---|
| 1430 | info->fin = tcphdr->flags & TCP_FIN;
|
---|
| 1431 | info->rst = tcphdr->flags & TCP_RST;
|
---|
| 1432 | info->syn = tcphdr->flags & TCP_SYN;
|
---|
| 1433 | info->ack = tcphdr->flags & TCP_ACK;
|
---|
| 1434 | if (info->ack)
|
---|
| 1435 | info->ackNumber = ntohl(tcphdr->ack);
|
---|
| 1436 |
|
---|
| 1437 | if (!IsPortRegistered(info->srcPort) && !IsPortRegistered(info->dstPort)) {
|
---|
| 1438 | SetError(SERVER_PORT_NOT_REG_STR, error, NULL, 0);
|
---|
| 1439 | return -1;
|
---|
| 1440 | }
|
---|
| 1441 |
|
---|
| 1442 | return 0;
|
---|
| 1443 | }
|
---|
| 1444 |
|
---|
| 1445 |
|
---|
| 1446 | /* Decode Record Layer Header */
|
---|
| 1447 | static int GetRecordHeader(const byte* input, RecordLayerHeader* rh, int* size)
|
---|
| 1448 | {
|
---|
| 1449 | XMEMCPY(rh, input, RECORD_HEADER_SZ);
|
---|
| 1450 | *size = (rh->length[0] << 8) | rh->length[1];
|
---|
| 1451 |
|
---|
| 1452 | if (*size > (MAX_RECORD_SIZE + COMP_EXTRA + MAX_MSG_EXTRA))
|
---|
| 1453 | return LENGTH_ERROR;
|
---|
| 1454 |
|
---|
| 1455 | return 0;
|
---|
| 1456 | }
|
---|
| 1457 |
|
---|
| 1458 |
|
---|
| 1459 | /* Process Client Key Exchange, RSA only */
|
---|
| 1460 | static int ProcessClientKeyExchange(const byte* input, int* sslBytes,
|
---|
| 1461 | SnifferSession* session, char* error)
|
---|
| 1462 | {
|
---|
| 1463 | word32 idx = 0;
|
---|
| 1464 | RsaKey key;
|
---|
| 1465 | int ret;
|
---|
| 1466 |
|
---|
| 1467 | if (session->sslServer->buffers.key == NULL ||
|
---|
| 1468 | session->sslServer->buffers.key->buffer == NULL ||
|
---|
| 1469 | session->sslServer->buffers.key->length == 0) {
|
---|
| 1470 |
|
---|
| 1471 | SetError(RSA_KEY_MISSING_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1472 | return -1;
|
---|
| 1473 | }
|
---|
| 1474 | ret = wc_InitRsaKey(&key, 0);
|
---|
| 1475 | if (ret == 0)
|
---|
| 1476 | ret = wc_RsaPrivateKeyDecode(session->sslServer->buffers.key->buffer,
|
---|
| 1477 | &idx, &key, session->sslServer->buffers.key->length);
|
---|
| 1478 | if (ret == 0) {
|
---|
| 1479 | int length = wc_RsaEncryptSize(&key);
|
---|
| 1480 |
|
---|
| 1481 | if (IsTLS(session->sslServer))
|
---|
| 1482 | input += 2; /* tls pre length */
|
---|
| 1483 |
|
---|
| 1484 | if (length > *sslBytes) {
|
---|
| 1485 | SetError(PARTIAL_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1486 | wc_FreeRsaKey(&key);
|
---|
| 1487 | return -1;
|
---|
| 1488 | }
|
---|
| 1489 | #ifdef WC_RSA_BLINDING
|
---|
| 1490 | ret = wc_RsaSetRNG(&key, session->sslServer->rng);
|
---|
| 1491 | if (ret != 0) {
|
---|
| 1492 | SetError(RSA_DECRYPT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1493 | return -1;
|
---|
| 1494 | }
|
---|
| 1495 | #endif
|
---|
| 1496 | do {
|
---|
| 1497 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
| 1498 | ret = wc_AsyncWait(ret, &key.asyncDev, WC_ASYNC_FLAG_CALL_AGAIN);
|
---|
| 1499 | #endif
|
---|
| 1500 | if (ret >= 0) {
|
---|
| 1501 | ret = wc_RsaPrivateDecrypt(input, length,
|
---|
| 1502 | session->sslServer->arrays->preMasterSecret, SECRET_LEN,
|
---|
| 1503 | &key);
|
---|
| 1504 | }
|
---|
| 1505 | } while (ret == WC_PENDING_E);
|
---|
| 1506 | if (ret != SECRET_LEN) {
|
---|
| 1507 | SetError(RSA_DECRYPT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1508 | wc_FreeRsaKey(&key);
|
---|
| 1509 | return -1;
|
---|
| 1510 | }
|
---|
| 1511 | session->sslServer->arrays->preMasterSz = SECRET_LEN;
|
---|
| 1512 |
|
---|
| 1513 | /* store for client side as well */
|
---|
| 1514 | XMEMCPY(session->sslClient->arrays->preMasterSecret,
|
---|
| 1515 | session->sslServer->arrays->preMasterSecret, SECRET_LEN);
|
---|
| 1516 | session->sslClient->arrays->preMasterSz = SECRET_LEN;
|
---|
| 1517 |
|
---|
| 1518 | #ifdef SHOW_SECRETS
|
---|
| 1519 | {
|
---|
| 1520 | int i;
|
---|
| 1521 | printf("pre master secret: ");
|
---|
| 1522 | for (i = 0; i < SECRET_LEN; i++)
|
---|
| 1523 | printf("%02x", session->sslServer->arrays->preMasterSecret[i]);
|
---|
| 1524 | printf("\n");
|
---|
| 1525 | }
|
---|
| 1526 | #endif
|
---|
| 1527 | }
|
---|
| 1528 | else {
|
---|
| 1529 | SetError(RSA_DECODE_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1530 | wc_FreeRsaKey(&key);
|
---|
| 1531 | return -1;
|
---|
| 1532 | }
|
---|
| 1533 |
|
---|
| 1534 | if (SetCipherSpecs(session->sslServer) != 0) {
|
---|
| 1535 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1536 | wc_FreeRsaKey(&key);
|
---|
| 1537 | return -1;
|
---|
| 1538 | }
|
---|
| 1539 |
|
---|
| 1540 | if (SetCipherSpecs(session->sslClient) != 0) {
|
---|
| 1541 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1542 | wc_FreeRsaKey(&key);
|
---|
| 1543 | return -1;
|
---|
| 1544 | }
|
---|
| 1545 |
|
---|
| 1546 | ret = MakeMasterSecret(session->sslServer);
|
---|
| 1547 | ret += MakeMasterSecret(session->sslClient);
|
---|
| 1548 | ret += SetKeysSide(session->sslServer, ENCRYPT_AND_DECRYPT_SIDE);
|
---|
| 1549 | ret += SetKeysSide(session->sslClient, ENCRYPT_AND_DECRYPT_SIDE);
|
---|
| 1550 |
|
---|
| 1551 | if (ret != 0) {
|
---|
| 1552 | SetError(BAD_DERIVE_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1553 | return -1;
|
---|
| 1554 | }
|
---|
| 1555 |
|
---|
| 1556 | #ifdef SHOW_SECRETS
|
---|
| 1557 | {
|
---|
| 1558 | int i;
|
---|
| 1559 | printf("server master secret: ");
|
---|
| 1560 | for (i = 0; i < SECRET_LEN; i++)
|
---|
| 1561 | printf("%02x", session->sslServer->arrays->masterSecret[i]);
|
---|
| 1562 | printf("\n");
|
---|
| 1563 |
|
---|
| 1564 | printf("client master secret: ");
|
---|
| 1565 | for (i = 0; i < SECRET_LEN; i++)
|
---|
| 1566 | printf("%02x", session->sslClient->arrays->masterSecret[i]);
|
---|
| 1567 | printf("\n");
|
---|
| 1568 |
|
---|
| 1569 | printf("server suite = %d\n", session->sslServer->options.cipherSuite);
|
---|
| 1570 | printf("client suite = %d\n", session->sslClient->options.cipherSuite);
|
---|
| 1571 | }
|
---|
| 1572 | #endif
|
---|
| 1573 |
|
---|
| 1574 | wc_FreeRsaKey(&key);
|
---|
| 1575 | return ret;
|
---|
| 1576 | }
|
---|
| 1577 |
|
---|
| 1578 |
|
---|
| 1579 | /* Process Session Ticket */
|
---|
| 1580 | static int ProcessSessionTicket(const byte* input, int* sslBytes,
|
---|
| 1581 | SnifferSession* session, char* error)
|
---|
| 1582 | {
|
---|
| 1583 | word16 len;
|
---|
| 1584 |
|
---|
| 1585 | /* make sure can read through hint and len */
|
---|
| 1586 | if (TICKET_HINT_LEN + LENGTH_SZ > *sslBytes) {
|
---|
| 1587 | SetError(BAD_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1588 | return -1;
|
---|
| 1589 | }
|
---|
| 1590 |
|
---|
| 1591 | input += TICKET_HINT_LEN; /* skip over hint */
|
---|
| 1592 | *sslBytes -= TICKET_HINT_LEN;
|
---|
| 1593 |
|
---|
| 1594 | len = (word16)((input[0] << 8) | input[1]);
|
---|
| 1595 | input += LENGTH_SZ;
|
---|
| 1596 | *sslBytes -= LENGTH_SZ;
|
---|
| 1597 |
|
---|
| 1598 | /* make sure can read through ticket */
|
---|
| 1599 | if (len > *sslBytes || len < ID_LEN) {
|
---|
| 1600 | SetError(BAD_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1601 | return -1;
|
---|
| 1602 | }
|
---|
| 1603 |
|
---|
| 1604 | /* store session with macID as sessionID */
|
---|
| 1605 | session->sslServer->options.haveSessionId = 1;
|
---|
| 1606 | XMEMCPY(session->sslServer->arrays->sessionID, input + len - ID_LEN,ID_LEN);
|
---|
| 1607 |
|
---|
| 1608 | return 0;
|
---|
| 1609 | }
|
---|
| 1610 |
|
---|
| 1611 |
|
---|
| 1612 | /* Process Server Hello */
|
---|
| 1613 | static int ProcessServerHello(int msgSz, const byte* input, int* sslBytes,
|
---|
| 1614 | SnifferSession* session, char* error)
|
---|
| 1615 | {
|
---|
| 1616 | ProtocolVersion pv;
|
---|
| 1617 | byte b;
|
---|
| 1618 | int toRead = VERSION_SZ + RAN_LEN + ENUM_LEN;
|
---|
| 1619 | int doResume = 0;
|
---|
| 1620 | int initialBytes = *sslBytes;
|
---|
| 1621 |
|
---|
| 1622 | (void)msgSz;
|
---|
| 1623 | (void)initialBytes;
|
---|
| 1624 |
|
---|
| 1625 | /* make sure we didn't miss ClientHello */
|
---|
| 1626 | if (session->flags.clientHello == 0) {
|
---|
| 1627 | SetError(MISSED_CLIENT_HELLO_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1628 | return -1;
|
---|
| 1629 | }
|
---|
| 1630 |
|
---|
| 1631 | /* make sure can read through session len */
|
---|
| 1632 | if (toRead > *sslBytes) {
|
---|
| 1633 | SetError(SERVER_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1634 | return -1;
|
---|
| 1635 | }
|
---|
| 1636 |
|
---|
| 1637 | XMEMCPY(&pv, input, VERSION_SZ);
|
---|
| 1638 | input += VERSION_SZ;
|
---|
| 1639 | *sslBytes -= VERSION_SZ;
|
---|
| 1640 |
|
---|
| 1641 | session->sslServer->version = pv;
|
---|
| 1642 | session->sslClient->version = pv;
|
---|
| 1643 |
|
---|
| 1644 | XMEMCPY(session->sslServer->arrays->serverRandom, input, RAN_LEN);
|
---|
| 1645 | XMEMCPY(session->sslClient->arrays->serverRandom, input, RAN_LEN);
|
---|
| 1646 | input += RAN_LEN;
|
---|
| 1647 | *sslBytes -= RAN_LEN;
|
---|
| 1648 |
|
---|
| 1649 | b = *input++;
|
---|
| 1650 | *sslBytes -= 1;
|
---|
| 1651 |
|
---|
| 1652 | /* make sure can read through compression */
|
---|
| 1653 | if ( (b + SUITE_LEN + ENUM_LEN) > *sslBytes) {
|
---|
| 1654 | SetError(SERVER_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1655 | return -1;
|
---|
| 1656 | }
|
---|
| 1657 | if (b) {
|
---|
| 1658 | XMEMCPY(session->sslServer->arrays->sessionID, input, ID_LEN);
|
---|
| 1659 | session->sslServer->options.haveSessionId = 1;
|
---|
| 1660 | }
|
---|
| 1661 | input += b;
|
---|
| 1662 | *sslBytes -= b;
|
---|
| 1663 |
|
---|
| 1664 | /* cipher suite */
|
---|
| 1665 | b = *input++; /* first byte, ECC or not */
|
---|
| 1666 | session->sslServer->options.cipherSuite0 = b;
|
---|
| 1667 | session->sslClient->options.cipherSuite0 = b;
|
---|
| 1668 | b = *input++;
|
---|
| 1669 | session->sslServer->options.cipherSuite = b;
|
---|
| 1670 | session->sslClient->options.cipherSuite = b;
|
---|
| 1671 | *sslBytes -= SUITE_LEN;
|
---|
| 1672 |
|
---|
| 1673 | /* compression */
|
---|
| 1674 | b = *input++;
|
---|
| 1675 | *sslBytes -= ENUM_LEN;
|
---|
| 1676 |
|
---|
| 1677 | if (b) {
|
---|
| 1678 | SetError(BAD_COMPRESSION_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1679 | return -1;
|
---|
| 1680 | }
|
---|
| 1681 |
|
---|
| 1682 | #ifdef HAVE_EXTENDED_MASTER
|
---|
| 1683 | /* extensions */
|
---|
| 1684 | if ((initialBytes - *sslBytes) < msgSz) {
|
---|
| 1685 | word16 len;
|
---|
| 1686 |
|
---|
| 1687 | /* skip extensions until extended master secret */
|
---|
| 1688 | /* make sure can read len */
|
---|
| 1689 | if (SUITE_LEN > *sslBytes) {
|
---|
| 1690 | SetError(SERVER_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1691 | return -1;
|
---|
| 1692 | }
|
---|
| 1693 | len = (word16)((input[0] << 8) | input[1]);
|
---|
| 1694 | input += SUITE_LEN;
|
---|
| 1695 | *sslBytes -= SUITE_LEN;
|
---|
| 1696 | /* make sure can read through all extensions */
|
---|
| 1697 | if (len > *sslBytes) {
|
---|
| 1698 | SetError(SERVER_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1699 | return -1;
|
---|
| 1700 | }
|
---|
| 1701 |
|
---|
| 1702 | while (len >= EXT_TYPE_SZ + LENGTH_SZ) {
|
---|
| 1703 | byte extType[EXT_TYPE_SZ];
|
---|
| 1704 | word16 extLen;
|
---|
| 1705 |
|
---|
| 1706 | extType[0] = input[0];
|
---|
| 1707 | extType[1] = input[1];
|
---|
| 1708 | input += EXT_TYPE_SZ;
|
---|
| 1709 | *sslBytes -= EXT_TYPE_SZ;
|
---|
| 1710 |
|
---|
| 1711 | extLen = (word16)((input[0] << 8) | input[1]);
|
---|
| 1712 | input += LENGTH_SZ;
|
---|
| 1713 | *sslBytes -= LENGTH_SZ;
|
---|
| 1714 |
|
---|
| 1715 | /* make sure can read through individual extension */
|
---|
| 1716 | if (extLen > *sslBytes) {
|
---|
| 1717 | SetError(SERVER_HELLO_INPUT_STR, error, session,
|
---|
| 1718 | FATAL_ERROR_STATE);
|
---|
| 1719 | return -1;
|
---|
| 1720 | }
|
---|
| 1721 |
|
---|
| 1722 | if (extType[0] == 0x00 && extType[1] == EXT_MASTER_SECRET) {
|
---|
| 1723 | session->flags.expectEms = 1;
|
---|
| 1724 | }
|
---|
| 1725 |
|
---|
| 1726 | input += extLen;
|
---|
| 1727 | *sslBytes -= extLen;
|
---|
| 1728 | len -= extLen + EXT_TYPE_SZ + LENGTH_SZ;
|
---|
| 1729 | }
|
---|
| 1730 | }
|
---|
| 1731 |
|
---|
| 1732 | if (!session->flags.expectEms) {
|
---|
| 1733 | free(session->hash);
|
---|
| 1734 | session->hash = NULL;
|
---|
| 1735 | }
|
---|
| 1736 | #endif
|
---|
| 1737 |
|
---|
| 1738 | if (session->sslServer->options.haveSessionId &&
|
---|
| 1739 | XMEMCMP(session->sslServer->arrays->sessionID,
|
---|
| 1740 | session->sslClient->arrays->sessionID, ID_LEN) == 0)
|
---|
| 1741 | doResume = 1;
|
---|
| 1742 | else if (session->sslClient->options.haveSessionId == 0 &&
|
---|
| 1743 | session->sslServer->options.haveSessionId == 0 &&
|
---|
| 1744 | session->ticketID)
|
---|
| 1745 | doResume = 1;
|
---|
| 1746 |
|
---|
| 1747 | if (session->ticketID && doResume) {
|
---|
| 1748 | /* use ticketID to retrieve from session, prefer over sessionID */
|
---|
| 1749 | XMEMCPY(session->sslServer->arrays->sessionID,session->ticketID,ID_LEN);
|
---|
| 1750 | session->sslServer->options.haveSessionId = 1; /* may not have
|
---|
| 1751 | actual sessionID */
|
---|
| 1752 | }
|
---|
| 1753 |
|
---|
| 1754 | if (doResume ) {
|
---|
| 1755 | int ret = 0;
|
---|
| 1756 | SSL_SESSION* resume = GetSession(session->sslServer,
|
---|
| 1757 | session->sslServer->arrays->masterSecret, 0);
|
---|
| 1758 | if (resume == NULL) {
|
---|
| 1759 | SetError(BAD_SESSION_RESUME_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1760 | return -1;
|
---|
| 1761 | }
|
---|
| 1762 | /* make sure client has master secret too */
|
---|
| 1763 | XMEMCPY(session->sslClient->arrays->masterSecret,
|
---|
| 1764 | session->sslServer->arrays->masterSecret, SECRET_LEN);
|
---|
| 1765 | session->flags.resuming = 1;
|
---|
| 1766 |
|
---|
| 1767 | Trace(SERVER_DID_RESUMPTION_STR);
|
---|
| 1768 | if (SetCipherSpecs(session->sslServer) != 0) {
|
---|
| 1769 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1770 | return -1;
|
---|
| 1771 | }
|
---|
| 1772 |
|
---|
| 1773 | if (SetCipherSpecs(session->sslClient) != 0) {
|
---|
| 1774 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1775 | return -1;
|
---|
| 1776 | }
|
---|
| 1777 |
|
---|
| 1778 | if (session->sslServer->options.tls) {
|
---|
| 1779 | ret = DeriveTlsKeys(session->sslServer);
|
---|
| 1780 | ret += DeriveTlsKeys(session->sslClient);
|
---|
| 1781 | }
|
---|
| 1782 | else {
|
---|
| 1783 | ret = DeriveKeys(session->sslServer);
|
---|
| 1784 | ret += DeriveKeys(session->sslClient);
|
---|
| 1785 | }
|
---|
| 1786 | ret += SetKeysSide(session->sslServer, ENCRYPT_AND_DECRYPT_SIDE);
|
---|
| 1787 | ret += SetKeysSide(session->sslClient, ENCRYPT_AND_DECRYPT_SIDE);
|
---|
| 1788 |
|
---|
| 1789 | if (ret != 0) {
|
---|
| 1790 | SetError(BAD_DERIVE_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1791 | return -1;
|
---|
| 1792 | }
|
---|
| 1793 | }
|
---|
| 1794 | #ifdef SHOW_SECRETS
|
---|
| 1795 | {
|
---|
| 1796 | int i;
|
---|
| 1797 | printf("cipher suite = 0x%02x\n",
|
---|
| 1798 | session->sslServer->options.cipherSuite);
|
---|
| 1799 | printf("server random: ");
|
---|
| 1800 | for (i = 0; i < RAN_LEN; i++)
|
---|
| 1801 | printf("%02x", session->sslServer->arrays->serverRandom[i]);
|
---|
| 1802 | printf("\n");
|
---|
| 1803 | }
|
---|
| 1804 | #endif
|
---|
| 1805 | return 0;
|
---|
| 1806 | }
|
---|
| 1807 |
|
---|
| 1808 |
|
---|
| 1809 | /* Process normal Client Hello */
|
---|
| 1810 | static int ProcessClientHello(const byte* input, int* sslBytes,
|
---|
| 1811 | SnifferSession* session, char* error)
|
---|
| 1812 | {
|
---|
| 1813 | byte bLen;
|
---|
| 1814 | word16 len;
|
---|
| 1815 | int toRead = VERSION_SZ + RAN_LEN + ENUM_LEN;
|
---|
| 1816 |
|
---|
| 1817 | #ifdef HAVE_SNI
|
---|
| 1818 | {
|
---|
| 1819 | byte name[MAX_SERVER_NAME];
|
---|
| 1820 | word32 nameSz = sizeof(name);
|
---|
| 1821 | int ret;
|
---|
| 1822 |
|
---|
| 1823 | ret = wolfSSL_SNI_GetFromBuffer(
|
---|
| 1824 | input - HANDSHAKE_HEADER_SZ - RECORD_HEADER_SZ,
|
---|
| 1825 | *sslBytes + HANDSHAKE_HEADER_SZ + RECORD_HEADER_SZ,
|
---|
| 1826 | WOLFSSL_SNI_HOST_NAME, name, &nameSz);
|
---|
| 1827 |
|
---|
| 1828 | if (ret == WOLFSSL_SUCCESS) {
|
---|
| 1829 | NamedKey* namedKey;
|
---|
| 1830 |
|
---|
| 1831 | if (nameSz >= sizeof(name))
|
---|
| 1832 | nameSz = sizeof(name) - 1;
|
---|
| 1833 | name[nameSz] = 0;
|
---|
| 1834 | wc_LockMutex(&session->context->namedKeysMutex);
|
---|
| 1835 | namedKey = session->context->namedKeys;
|
---|
| 1836 | while (namedKey != NULL) {
|
---|
| 1837 | if (nameSz == namedKey->nameSz &&
|
---|
| 1838 | XSTRNCMP((char*)name, namedKey->name, nameSz) == 0) {
|
---|
| 1839 | if (wolfSSL_use_PrivateKey_buffer(session->sslServer,
|
---|
| 1840 | namedKey->key, namedKey->keySz,
|
---|
| 1841 | WOLFSSL_FILETYPE_ASN1) != WOLFSSL_SUCCESS) {
|
---|
| 1842 | wc_UnLockMutex(&session->context->namedKeysMutex);
|
---|
| 1843 | SetError(CLIENT_HELLO_LATE_KEY_STR, error, session,
|
---|
| 1844 | FATAL_ERROR_STATE);
|
---|
| 1845 | return -1;
|
---|
| 1846 | }
|
---|
| 1847 | break;
|
---|
| 1848 | }
|
---|
| 1849 | else
|
---|
| 1850 | namedKey = namedKey->next;
|
---|
| 1851 | }
|
---|
| 1852 | wc_UnLockMutex(&session->context->namedKeysMutex);
|
---|
| 1853 | }
|
---|
| 1854 | }
|
---|
| 1855 | #endif
|
---|
| 1856 |
|
---|
| 1857 | session->flags.clientHello = 1; /* don't process again */
|
---|
| 1858 |
|
---|
| 1859 | /* make sure can read up to session len */
|
---|
| 1860 | if (toRead > *sslBytes) {
|
---|
| 1861 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1862 | return -1;
|
---|
| 1863 | }
|
---|
| 1864 |
|
---|
| 1865 | /* skip, get negotiated one from server hello */
|
---|
| 1866 | input += VERSION_SZ;
|
---|
| 1867 | *sslBytes -= VERSION_SZ;
|
---|
| 1868 |
|
---|
| 1869 | XMEMCPY(session->sslServer->arrays->clientRandom, input, RAN_LEN);
|
---|
| 1870 | XMEMCPY(session->sslClient->arrays->clientRandom, input, RAN_LEN);
|
---|
| 1871 |
|
---|
| 1872 | input += RAN_LEN;
|
---|
| 1873 | *sslBytes -= RAN_LEN;
|
---|
| 1874 |
|
---|
| 1875 | /* store session in case trying to resume */
|
---|
| 1876 | bLen = *input++;
|
---|
| 1877 | *sslBytes -= ENUM_LEN;
|
---|
| 1878 | if (bLen) {
|
---|
| 1879 | if (ID_LEN > *sslBytes) {
|
---|
| 1880 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1881 | return -1;
|
---|
| 1882 | }
|
---|
| 1883 | Trace(CLIENT_RESUME_TRY_STR);
|
---|
| 1884 | XMEMCPY(session->sslClient->arrays->sessionID, input, ID_LEN);
|
---|
| 1885 | session->sslClient->options.haveSessionId = 1;
|
---|
| 1886 | }
|
---|
| 1887 | #ifdef SHOW_SECRETS
|
---|
| 1888 | {
|
---|
| 1889 | int i;
|
---|
| 1890 | printf("client random: ");
|
---|
| 1891 | for (i = 0; i < RAN_LEN; i++)
|
---|
| 1892 | printf("%02x", session->sslServer->arrays->clientRandom[i]);
|
---|
| 1893 | printf("\n");
|
---|
| 1894 | }
|
---|
| 1895 | #endif
|
---|
| 1896 |
|
---|
| 1897 | input += bLen;
|
---|
| 1898 | *sslBytes -= bLen;
|
---|
| 1899 |
|
---|
| 1900 | /* skip cipher suites */
|
---|
| 1901 | /* make sure can read len */
|
---|
| 1902 | if (SUITE_LEN > *sslBytes) {
|
---|
| 1903 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1904 | return -1;
|
---|
| 1905 | }
|
---|
| 1906 | len = (word16)((input[0] << 8) | input[1]);
|
---|
| 1907 | input += SUITE_LEN;
|
---|
| 1908 | *sslBytes -= SUITE_LEN;
|
---|
| 1909 | /* make sure can read suites + comp len */
|
---|
| 1910 | if (len + ENUM_LEN > *sslBytes) {
|
---|
| 1911 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1912 | return -1;
|
---|
| 1913 | }
|
---|
| 1914 | input += len;
|
---|
| 1915 | *sslBytes -= len;
|
---|
| 1916 |
|
---|
| 1917 | /* skip compression */
|
---|
| 1918 | bLen = *input++;
|
---|
| 1919 | *sslBytes -= ENUM_LEN;
|
---|
| 1920 | /* make sure can read len */
|
---|
| 1921 | if (bLen > *sslBytes) {
|
---|
| 1922 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1923 | return -1;
|
---|
| 1924 | }
|
---|
| 1925 | input += bLen;
|
---|
| 1926 | *sslBytes -= bLen;
|
---|
| 1927 |
|
---|
| 1928 | if (*sslBytes == 0) {
|
---|
| 1929 | /* no extensions */
|
---|
| 1930 | return 0;
|
---|
| 1931 | }
|
---|
| 1932 |
|
---|
| 1933 | /* skip extensions until session ticket */
|
---|
| 1934 | /* make sure can read len */
|
---|
| 1935 | if (SUITE_LEN > *sslBytes) {
|
---|
| 1936 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1937 | return -1;
|
---|
| 1938 | }
|
---|
| 1939 | len = (word16)((input[0] << 8) | input[1]);
|
---|
| 1940 | input += SUITE_LEN;
|
---|
| 1941 | *sslBytes -= SUITE_LEN;
|
---|
| 1942 | /* make sure can read through all extensions */
|
---|
| 1943 | if (len > *sslBytes) {
|
---|
| 1944 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1945 | return -1;
|
---|
| 1946 | }
|
---|
| 1947 |
|
---|
| 1948 | while (len >= EXT_TYPE_SZ + LENGTH_SZ) {
|
---|
| 1949 | byte extType[EXT_TYPE_SZ];
|
---|
| 1950 | word16 extLen;
|
---|
| 1951 |
|
---|
| 1952 | extType[0] = input[0];
|
---|
| 1953 | extType[1] = input[1];
|
---|
| 1954 | input += EXT_TYPE_SZ;
|
---|
| 1955 | *sslBytes -= EXT_TYPE_SZ;
|
---|
| 1956 |
|
---|
| 1957 | extLen = (word16)((input[0] << 8) | input[1]);
|
---|
| 1958 | input += LENGTH_SZ;
|
---|
| 1959 | *sslBytes -= LENGTH_SZ;
|
---|
| 1960 |
|
---|
| 1961 | /* make sure can read through individual extension */
|
---|
| 1962 | if (extLen > *sslBytes) {
|
---|
| 1963 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1964 | return -1;
|
---|
| 1965 | }
|
---|
| 1966 |
|
---|
| 1967 | if (extType[0] == 0x00 && extType[1] == TICKET_EXT_ID) {
|
---|
| 1968 |
|
---|
| 1969 | /* make sure can read through ticket if there is a non blank one */
|
---|
| 1970 | if (extLen && extLen < ID_LEN) {
|
---|
| 1971 | SetError(CLIENT_HELLO_INPUT_STR, error, session,
|
---|
| 1972 | FATAL_ERROR_STATE);
|
---|
| 1973 | return -1;
|
---|
| 1974 | }
|
---|
| 1975 |
|
---|
| 1976 | if (extLen) {
|
---|
| 1977 | if (session->ticketID == 0) {
|
---|
| 1978 | session->ticketID = (byte*)malloc(ID_LEN);
|
---|
| 1979 | if (session->ticketID == 0) {
|
---|
| 1980 | SetError(MEMORY_STR, error, session,
|
---|
| 1981 | FATAL_ERROR_STATE);
|
---|
| 1982 | return -1;
|
---|
| 1983 | }
|
---|
| 1984 | }
|
---|
| 1985 | XMEMCPY(session->ticketID, input + extLen - ID_LEN, ID_LEN);
|
---|
| 1986 | }
|
---|
| 1987 | }
|
---|
| 1988 |
|
---|
| 1989 | input += extLen;
|
---|
| 1990 | *sslBytes -= extLen;
|
---|
| 1991 | len -= extLen + EXT_TYPE_SZ + LENGTH_SZ;
|
---|
| 1992 | }
|
---|
| 1993 |
|
---|
| 1994 | return 0;
|
---|
| 1995 | }
|
---|
| 1996 |
|
---|
| 1997 |
|
---|
| 1998 | /* Process Finished */
|
---|
| 1999 | static int ProcessFinished(const byte* input, int size, int* sslBytes,
|
---|
| 2000 | SnifferSession* session, char* error)
|
---|
| 2001 | {
|
---|
| 2002 | SSL* ssl;
|
---|
| 2003 | word32 inOutIdx = 0;
|
---|
| 2004 | int ret;
|
---|
| 2005 |
|
---|
| 2006 | if (session->flags.side == WOLFSSL_SERVER_END)
|
---|
| 2007 | ssl = session->sslServer;
|
---|
| 2008 | else
|
---|
| 2009 | ssl = session->sslClient;
|
---|
| 2010 |
|
---|
| 2011 | ret = DoFinished(ssl, input, &inOutIdx, (word32) size, (word32) *sslBytes,
|
---|
| 2012 | SNIFF);
|
---|
| 2013 | *sslBytes -= (int)inOutIdx;
|
---|
| 2014 |
|
---|
| 2015 | if (ret < 0) {
|
---|
| 2016 | SetError(BAD_FINISHED_MSG, error, session, FATAL_ERROR_STATE);
|
---|
| 2017 | return ret;
|
---|
| 2018 | }
|
---|
| 2019 |
|
---|
| 2020 | if (ret == 0 && session->flags.cached == 0) {
|
---|
| 2021 | if (session->sslServer->options.haveSessionId) {
|
---|
| 2022 | WOLFSSL_SESSION* sess = GetSession(session->sslServer, NULL, 0);
|
---|
| 2023 | if (sess == NULL)
|
---|
| 2024 | AddSession(session->sslServer); /* don't re add */
|
---|
| 2025 | session->flags.cached = 1;
|
---|
| 2026 | }
|
---|
| 2027 | }
|
---|
| 2028 |
|
---|
| 2029 | /* If receiving a finished message from one side, free the resources
|
---|
| 2030 | * from the other side's tracker. */
|
---|
| 2031 | if (session->flags.side == WOLFSSL_SERVER_END)
|
---|
| 2032 | FreeHandshakeResources(session->sslClient);
|
---|
| 2033 | else
|
---|
| 2034 | FreeHandshakeResources(session->sslServer);
|
---|
| 2035 |
|
---|
| 2036 | return ret;
|
---|
| 2037 | }
|
---|
| 2038 |
|
---|
| 2039 |
|
---|
| 2040 | /* Process HandShake input */
|
---|
| 2041 | static int DoHandShake(const byte* input, int* sslBytes,
|
---|
| 2042 | SnifferSession* session, char* error)
|
---|
| 2043 | {
|
---|
| 2044 | byte type;
|
---|
| 2045 | int size;
|
---|
| 2046 | int ret = 0;
|
---|
| 2047 | int startBytes;
|
---|
| 2048 |
|
---|
| 2049 | if (*sslBytes < HANDSHAKE_HEADER_SZ) {
|
---|
| 2050 | SetError(HANDSHAKE_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2051 | return -1;
|
---|
| 2052 | }
|
---|
| 2053 | type = input[0];
|
---|
| 2054 | size = (input[1] << 16) | (input[2] << 8) | input[3];
|
---|
| 2055 |
|
---|
| 2056 | input += HANDSHAKE_HEADER_SZ;
|
---|
| 2057 | *sslBytes -= HANDSHAKE_HEADER_SZ;
|
---|
| 2058 | startBytes = *sslBytes;
|
---|
| 2059 |
|
---|
| 2060 | if (*sslBytes < size) {
|
---|
| 2061 | SetError(HANDSHAKE_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2062 | return -1;
|
---|
| 2063 | }
|
---|
| 2064 |
|
---|
| 2065 | /* A session's arrays are released when the handshake is completed. */
|
---|
| 2066 | if (session->sslServer->arrays == NULL &&
|
---|
| 2067 | session->sslClient->arrays == NULL) {
|
---|
| 2068 |
|
---|
| 2069 | SetError(NO_SECURE_RENEGOTIATION, error, session, FATAL_ERROR_STATE);
|
---|
| 2070 | return -1;
|
---|
| 2071 | }
|
---|
| 2072 |
|
---|
| 2073 | #ifdef HAVE_EXTENDED_MASTER
|
---|
| 2074 | if (session->hash) {
|
---|
| 2075 | if (HashUpdate(session->hash, input, size) != 0) {
|
---|
| 2076 | SetError(EXTENDED_MASTER_HASH_STR, error,
|
---|
| 2077 | session, FATAL_ERROR_STATE);
|
---|
| 2078 | return -1;
|
---|
| 2079 | }
|
---|
| 2080 | }
|
---|
| 2081 | #endif
|
---|
| 2082 |
|
---|
| 2083 | switch (type) {
|
---|
| 2084 | case hello_verify_request:
|
---|
| 2085 | Trace(GOT_HELLO_VERIFY_STR);
|
---|
| 2086 | break;
|
---|
| 2087 | case hello_request:
|
---|
| 2088 | Trace(GOT_HELLO_REQUEST_STR);
|
---|
| 2089 | break;
|
---|
| 2090 | case session_ticket:
|
---|
| 2091 | Trace(GOT_SESSION_TICKET_STR);
|
---|
| 2092 | ret = ProcessSessionTicket(input, sslBytes, session, error);
|
---|
| 2093 | break;
|
---|
| 2094 | case server_hello:
|
---|
| 2095 | Trace(GOT_SERVER_HELLO_STR);
|
---|
| 2096 | ret = ProcessServerHello(size, input, sslBytes, session, error);
|
---|
| 2097 | break;
|
---|
| 2098 | case certificate_request:
|
---|
| 2099 | Trace(GOT_CERT_REQ_STR);
|
---|
| 2100 | break;
|
---|
| 2101 | case server_key_exchange:
|
---|
| 2102 | Trace(GOT_SERVER_KEY_EX_STR);
|
---|
| 2103 | /* can't know temp key passively */
|
---|
| 2104 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2105 | ret = -1;
|
---|
| 2106 | break;
|
---|
| 2107 | case certificate:
|
---|
| 2108 | Trace(GOT_CERT_STR);
|
---|
| 2109 | break;
|
---|
| 2110 | case server_hello_done:
|
---|
| 2111 | Trace(GOT_SERVER_HELLO_DONE_STR);
|
---|
| 2112 | break;
|
---|
| 2113 | case finished:
|
---|
| 2114 | Trace(GOT_FINISHED_STR);
|
---|
| 2115 | ret = ProcessFinished(input, size, sslBytes, session, error);
|
---|
| 2116 | break;
|
---|
| 2117 | case client_hello:
|
---|
| 2118 | Trace(GOT_CLIENT_HELLO_STR);
|
---|
| 2119 | ret = ProcessClientHello(input, sslBytes, session, error);
|
---|
| 2120 | break;
|
---|
| 2121 | case client_key_exchange:
|
---|
| 2122 | Trace(GOT_CLIENT_KEY_EX_STR);
|
---|
| 2123 | #ifdef HAVE_EXTENDED_MASTER
|
---|
| 2124 | if (session->flags.expectEms && session->hash != NULL) {
|
---|
| 2125 | if (HashCopy(session->sslServer->hsHashes,
|
---|
| 2126 | session->hash) == 0 &&
|
---|
| 2127 | HashCopy(session->sslClient->hsHashes,
|
---|
| 2128 | session->hash) == 0) {
|
---|
| 2129 |
|
---|
| 2130 | session->sslServer->options.haveEMS = 1;
|
---|
| 2131 | session->sslClient->options.haveEMS = 1;
|
---|
| 2132 | }
|
---|
| 2133 | else {
|
---|
| 2134 | SetError(EXTENDED_MASTER_HASH_STR, error,
|
---|
| 2135 | session, FATAL_ERROR_STATE);
|
---|
| 2136 | ret = -1;
|
---|
| 2137 | }
|
---|
| 2138 | XMEMSET(session->hash, 0, sizeof(HsHashes));
|
---|
| 2139 | free(session->hash);
|
---|
| 2140 | session->hash = NULL;
|
---|
| 2141 | }
|
---|
| 2142 | else {
|
---|
| 2143 | session->sslServer->options.haveEMS = 0;
|
---|
| 2144 | session->sslClient->options.haveEMS = 0;
|
---|
| 2145 | }
|
---|
| 2146 | #endif
|
---|
| 2147 | if (ret == 0)
|
---|
| 2148 | ret = ProcessClientKeyExchange(input, sslBytes, session, error);
|
---|
| 2149 | break;
|
---|
| 2150 | case certificate_verify:
|
---|
| 2151 | Trace(GOT_CERT_VER_STR);
|
---|
| 2152 | break;
|
---|
| 2153 | case certificate_status:
|
---|
| 2154 | Trace(GOT_CERT_STATUS_STR);
|
---|
| 2155 | break;
|
---|
| 2156 | default:
|
---|
| 2157 | SetError(GOT_UNKNOWN_HANDSHAKE_STR, error, session, 0);
|
---|
| 2158 | return -1;
|
---|
| 2159 | }
|
---|
| 2160 |
|
---|
| 2161 | *sslBytes = startBytes - size; /* actual bytes of full process */
|
---|
| 2162 |
|
---|
| 2163 | return ret;
|
---|
| 2164 | }
|
---|
| 2165 |
|
---|
| 2166 |
|
---|
| 2167 | /* Decrypt input into plain output, 0 on success */
|
---|
| 2168 | static int Decrypt(SSL* ssl, byte* output, const byte* input, word32 sz)
|
---|
| 2169 | {
|
---|
| 2170 | int ret = 0;
|
---|
| 2171 |
|
---|
| 2172 | (void)output;
|
---|
| 2173 | (void)input;
|
---|
| 2174 | (void)sz;
|
---|
| 2175 |
|
---|
| 2176 | switch (ssl->specs.bulk_cipher_algorithm) {
|
---|
| 2177 | #ifdef BUILD_ARC4
|
---|
| 2178 | case wolfssl_rc4:
|
---|
| 2179 | wc_Arc4Process(ssl->decrypt.arc4, output, input, sz);
|
---|
| 2180 | break;
|
---|
| 2181 | #endif
|
---|
| 2182 |
|
---|
| 2183 | #ifdef BUILD_DES3
|
---|
| 2184 | case wolfssl_triple_des:
|
---|
| 2185 | ret = wc_Des3_CbcDecrypt(ssl->decrypt.des3, output, input, sz);
|
---|
| 2186 | break;
|
---|
| 2187 | #endif
|
---|
| 2188 |
|
---|
| 2189 | #ifdef BUILD_AES
|
---|
| 2190 | case wolfssl_aes:
|
---|
| 2191 | ret = wc_AesCbcDecrypt(ssl->decrypt.aes, output, input, sz);
|
---|
| 2192 | break;
|
---|
| 2193 | #endif
|
---|
| 2194 |
|
---|
| 2195 | #ifdef HAVE_HC128
|
---|
| 2196 | case wolfssl_hc128:
|
---|
| 2197 | wc_Hc128_Process(ssl->decrypt.hc128, output, input, sz);
|
---|
| 2198 | break;
|
---|
| 2199 | #endif
|
---|
| 2200 |
|
---|
| 2201 | #ifdef BUILD_RABBIT
|
---|
| 2202 | case wolfssl_rabbit:
|
---|
| 2203 | wc_RabbitProcess(ssl->decrypt.rabbit, output, input, sz);
|
---|
| 2204 | break;
|
---|
| 2205 | #endif
|
---|
| 2206 |
|
---|
| 2207 | #ifdef HAVE_CAMELLIA
|
---|
| 2208 | case wolfssl_camellia:
|
---|
| 2209 | wc_CamelliaCbcDecrypt(ssl->decrypt.cam, output, input, sz);
|
---|
| 2210 | break;
|
---|
| 2211 | #endif
|
---|
| 2212 |
|
---|
| 2213 | #ifdef HAVE_IDEA
|
---|
| 2214 | case wolfssl_idea:
|
---|
| 2215 | wc_IdeaCbcDecrypt(ssl->decrypt.idea, output, input, sz);
|
---|
| 2216 | break;
|
---|
| 2217 | #endif
|
---|
| 2218 |
|
---|
| 2219 | #ifdef HAVE_AESGCM
|
---|
| 2220 | case wolfssl_aes_gcm:
|
---|
| 2221 | if (sz >= (word32)(AESGCM_EXP_IV_SZ + ssl->specs.aead_mac_size))
|
---|
| 2222 | {
|
---|
| 2223 | /* scratch buffer, sniffer ignores auth tag*/
|
---|
| 2224 | byte authTag[WOLFSSL_MIN_AUTH_TAG_SZ];
|
---|
| 2225 |
|
---|
| 2226 | byte nonce[AESGCM_NONCE_SZ];
|
---|
| 2227 | XMEMCPY(nonce, ssl->keys.aead_dec_imp_IV, AESGCM_IMP_IV_SZ);
|
---|
| 2228 | XMEMCPY(nonce + AESGCM_IMP_IV_SZ, input, AESGCM_EXP_IV_SZ);
|
---|
| 2229 |
|
---|
| 2230 | if (wc_AesGcmEncrypt(ssl->decrypt.aes,
|
---|
| 2231 | output,
|
---|
| 2232 | input + AESGCM_EXP_IV_SZ,
|
---|
| 2233 | sz - AESGCM_EXP_IV_SZ - ssl->specs.aead_mac_size,
|
---|
| 2234 | nonce, AESGCM_NONCE_SZ,
|
---|
| 2235 | authTag, sizeof(authTag),
|
---|
| 2236 | NULL, 0) < 0) {
|
---|
| 2237 | Trace(BAD_DECRYPT);
|
---|
| 2238 | ret = -1;
|
---|
| 2239 | }
|
---|
| 2240 | ForceZero(nonce, AESGCM_NONCE_SZ);
|
---|
| 2241 | }
|
---|
| 2242 | else {
|
---|
| 2243 | Trace(BAD_DECRYPT_SIZE);
|
---|
| 2244 | ret = -1;
|
---|
| 2245 | }
|
---|
| 2246 | break;
|
---|
| 2247 | #endif
|
---|
| 2248 |
|
---|
| 2249 | default:
|
---|
| 2250 | Trace(BAD_DECRYPT_TYPE);
|
---|
| 2251 | ret = -1;
|
---|
| 2252 | break;
|
---|
| 2253 | }
|
---|
| 2254 |
|
---|
| 2255 | return ret;
|
---|
| 2256 | }
|
---|
| 2257 |
|
---|
| 2258 |
|
---|
| 2259 | /* Decrypt input message into output, adjust output steam if needed */
|
---|
| 2260 | static const byte* DecryptMessage(SSL* ssl, const byte* input, word32 sz,
|
---|
| 2261 | byte* output, int* error, int* advance)
|
---|
| 2262 | {
|
---|
| 2263 | int ivExtra = 0;
|
---|
| 2264 |
|
---|
| 2265 | int ret = Decrypt(ssl, output, input, sz);
|
---|
| 2266 | if (ret != 0) {
|
---|
| 2267 | *error = ret;
|
---|
| 2268 | return NULL;
|
---|
| 2269 | }
|
---|
| 2270 | ssl->keys.encryptSz = sz;
|
---|
| 2271 | if (ssl->options.tls1_1 && ssl->specs.cipher_type == block) {
|
---|
| 2272 | output += ssl->specs.block_size; /* go past TLSv1.1 IV */
|
---|
| 2273 | ivExtra = ssl->specs.block_size;
|
---|
| 2274 | *advance = ssl->specs.block_size;
|
---|
| 2275 | }
|
---|
| 2276 |
|
---|
| 2277 | if (ssl->specs.cipher_type == aead) {
|
---|
| 2278 | *advance = ssl->specs.aead_mac_size;
|
---|
| 2279 | ssl->keys.padSz = ssl->specs.aead_mac_size;
|
---|
| 2280 | }
|
---|
| 2281 | else
|
---|
| 2282 | ssl->keys.padSz = ssl->specs.hash_size;
|
---|
| 2283 |
|
---|
| 2284 | if (ssl->specs.cipher_type == block)
|
---|
| 2285 | ssl->keys.padSz += *(output + sz - ivExtra - 1) + 1;
|
---|
| 2286 |
|
---|
| 2287 | return output;
|
---|
| 2288 | }
|
---|
| 2289 |
|
---|
| 2290 |
|
---|
| 2291 | /* remove session from table, use rowHint if no info (means we have a lock) */
|
---|
| 2292 | static void RemoveSession(SnifferSession* session, IpInfo* ipInfo,
|
---|
| 2293 | TcpInfo* tcpInfo, word32 rowHint)
|
---|
| 2294 | {
|
---|
| 2295 | SnifferSession* previous = 0;
|
---|
| 2296 | SnifferSession* current;
|
---|
| 2297 | word32 row = rowHint;
|
---|
| 2298 | int haveLock = 0;
|
---|
| 2299 |
|
---|
| 2300 | if (ipInfo && tcpInfo)
|
---|
| 2301 | row = SessionHash(ipInfo, tcpInfo);
|
---|
| 2302 | else
|
---|
| 2303 | haveLock = 1;
|
---|
| 2304 |
|
---|
| 2305 | assert(row <= HASH_SIZE);
|
---|
| 2306 | Trace(REMOVE_SESSION_STR);
|
---|
| 2307 |
|
---|
| 2308 | if (!haveLock)
|
---|
| 2309 | wc_LockMutex(&SessionMutex);
|
---|
| 2310 |
|
---|
| 2311 | current = SessionTable[row];
|
---|
| 2312 |
|
---|
| 2313 | while (current) {
|
---|
| 2314 | if (current == session) {
|
---|
| 2315 | if (previous)
|
---|
| 2316 | previous->next = current->next;
|
---|
| 2317 | else
|
---|
| 2318 | SessionTable[row] = current->next;
|
---|
| 2319 | FreeSnifferSession(session);
|
---|
| 2320 | TraceRemovedSession();
|
---|
| 2321 | break;
|
---|
| 2322 | }
|
---|
| 2323 | previous = current;
|
---|
| 2324 | current = current->next;
|
---|
| 2325 | }
|
---|
| 2326 |
|
---|
| 2327 | if (!haveLock)
|
---|
| 2328 | wc_UnLockMutex(&SessionMutex);
|
---|
| 2329 | }
|
---|
| 2330 |
|
---|
| 2331 |
|
---|
| 2332 | /* Remove stale sessions from the Session Table, have a lock */
|
---|
| 2333 | static void RemoveStaleSessions(void)
|
---|
| 2334 | {
|
---|
| 2335 | word32 i;
|
---|
| 2336 | SnifferSession* session;
|
---|
| 2337 |
|
---|
| 2338 | for (i = 0; i < HASH_SIZE; i++) {
|
---|
| 2339 | session = SessionTable[i];
|
---|
| 2340 | while (session) {
|
---|
| 2341 | SnifferSession* next = session->next;
|
---|
| 2342 | if (time(NULL) >= session->lastUsed + WOLFSSL_SNIFFER_TIMEOUT) {
|
---|
| 2343 | TraceStaleSession();
|
---|
| 2344 | RemoveSession(session, NULL, NULL, i);
|
---|
| 2345 | }
|
---|
| 2346 | session = next;
|
---|
| 2347 | }
|
---|
| 2348 | }
|
---|
| 2349 | }
|
---|
| 2350 |
|
---|
| 2351 |
|
---|
| 2352 | /* Create a new Sniffer Session */
|
---|
| 2353 | static SnifferSession* CreateSession(IpInfo* ipInfo, TcpInfo* tcpInfo,
|
---|
| 2354 | char* error)
|
---|
| 2355 | {
|
---|
| 2356 | SnifferSession* session = 0;
|
---|
| 2357 | int row;
|
---|
| 2358 |
|
---|
| 2359 | Trace(NEW_SESSION_STR);
|
---|
| 2360 | /* create a new one */
|
---|
| 2361 | session = (SnifferSession*)malloc(sizeof(SnifferSession));
|
---|
| 2362 | if (session == NULL) {
|
---|
| 2363 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
| 2364 | return 0;
|
---|
| 2365 | }
|
---|
| 2366 | InitSession(session);
|
---|
| 2367 | #ifdef HAVE_EXTENDED_MASTER
|
---|
| 2368 | {
|
---|
| 2369 | HsHashes* newHash = (HsHashes*)malloc(sizeof(HsHashes));
|
---|
| 2370 | if (newHash == NULL) {
|
---|
| 2371 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
| 2372 | free(session);
|
---|
| 2373 | return 0;
|
---|
| 2374 | }
|
---|
| 2375 | if (HashInit(newHash) != 0) {
|
---|
| 2376 | SetError(EXTENDED_MASTER_HASH_STR, error, NULL, 0);
|
---|
| 2377 | free(session);
|
---|
| 2378 | return 0;
|
---|
| 2379 | }
|
---|
| 2380 | session->hash = newHash;
|
---|
| 2381 | }
|
---|
| 2382 | #endif
|
---|
| 2383 | session->server = ipInfo->dst;
|
---|
| 2384 | session->client = ipInfo->src;
|
---|
| 2385 | session->srvPort = (word16)tcpInfo->dstPort;
|
---|
| 2386 | session->cliPort = (word16)tcpInfo->srcPort;
|
---|
| 2387 | session->cliSeqStart = tcpInfo->sequence;
|
---|
| 2388 | session->cliExpected = 1; /* relative */
|
---|
| 2389 | session->lastUsed= time(NULL);
|
---|
| 2390 |
|
---|
| 2391 | session->context = GetSnifferServer(ipInfo, tcpInfo);
|
---|
| 2392 | if (session->context == NULL) {
|
---|
| 2393 | SetError(SERVER_NOT_REG_STR, error, NULL, 0);
|
---|
| 2394 | free(session);
|
---|
| 2395 | return 0;
|
---|
| 2396 | }
|
---|
| 2397 |
|
---|
| 2398 | session->sslServer = SSL_new(session->context->ctx);
|
---|
| 2399 | if (session->sslServer == NULL) {
|
---|
| 2400 | SetError(BAD_NEW_SSL_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2401 | free(session);
|
---|
| 2402 | return 0;
|
---|
| 2403 | }
|
---|
| 2404 | session->sslClient = SSL_new(session->context->ctx);
|
---|
| 2405 | if (session->sslClient == NULL) {
|
---|
| 2406 | SSL_free(session->sslServer);
|
---|
| 2407 | session->sslServer = 0;
|
---|
| 2408 |
|
---|
| 2409 | SetError(BAD_NEW_SSL_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2410 | free(session);
|
---|
| 2411 | return 0;
|
---|
| 2412 | }
|
---|
| 2413 | /* put server back into server mode */
|
---|
| 2414 | session->sslServer->options.side = WOLFSSL_SERVER_END;
|
---|
| 2415 |
|
---|
| 2416 | row = SessionHash(ipInfo, tcpInfo);
|
---|
| 2417 |
|
---|
| 2418 | /* add it to the session table */
|
---|
| 2419 | wc_LockMutex(&SessionMutex);
|
---|
| 2420 |
|
---|
| 2421 | session->next = SessionTable[row];
|
---|
| 2422 | SessionTable[row] = session;
|
---|
| 2423 |
|
---|
| 2424 | SessionCount++;
|
---|
| 2425 |
|
---|
| 2426 | if ( (SessionCount % HASH_SIZE) == 0) {
|
---|
| 2427 | TraceFindingStale();
|
---|
| 2428 | RemoveStaleSessions();
|
---|
| 2429 | }
|
---|
| 2430 |
|
---|
| 2431 | wc_UnLockMutex(&SessionMutex);
|
---|
| 2432 |
|
---|
| 2433 | /* determine headed side */
|
---|
| 2434 | if (ipInfo->dst == session->context->server &&
|
---|
| 2435 | tcpInfo->dstPort == session->context->port)
|
---|
| 2436 | session->flags.side = WOLFSSL_SERVER_END;
|
---|
| 2437 | else
|
---|
| 2438 | session->flags.side = WOLFSSL_CLIENT_END;
|
---|
| 2439 |
|
---|
| 2440 | return session;
|
---|
| 2441 | }
|
---|
| 2442 |
|
---|
| 2443 |
|
---|
| 2444 | #ifdef OLD_HELLO_ALLOWED
|
---|
| 2445 |
|
---|
| 2446 | /* Process Old Client Hello Input */
|
---|
| 2447 | static int DoOldHello(SnifferSession* session, const byte* sslFrame,
|
---|
| 2448 | int* rhSize, int* sslBytes, char* error)
|
---|
| 2449 | {
|
---|
| 2450 | const byte* input = sslFrame;
|
---|
| 2451 | byte b0, b1;
|
---|
| 2452 | word32 idx = 0;
|
---|
| 2453 | int ret;
|
---|
| 2454 |
|
---|
| 2455 | Trace(GOT_OLD_CLIENT_HELLO_STR);
|
---|
| 2456 | session->flags.clientHello = 1; /* don't process again */
|
---|
| 2457 | b0 = *input++;
|
---|
| 2458 | b1 = *input++;
|
---|
| 2459 | *sslBytes -= 2;
|
---|
| 2460 | *rhSize = ((b0 & 0x7f) << 8) | b1;
|
---|
| 2461 |
|
---|
| 2462 | if (*rhSize > *sslBytes) {
|
---|
| 2463 | SetError(OLD_CLIENT_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2464 | return -1;
|
---|
| 2465 | }
|
---|
| 2466 |
|
---|
| 2467 | ret = ProcessOldClientHello(session->sslServer, input, &idx, *sslBytes,
|
---|
| 2468 | (word16)*rhSize);
|
---|
| 2469 | if (ret < 0 && ret != MATCH_SUITE_ERROR) {
|
---|
| 2470 | SetError(BAD_OLD_CLIENT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2471 | return -1;
|
---|
| 2472 | }
|
---|
| 2473 |
|
---|
| 2474 | Trace(OLD_CLIENT_OK_STR);
|
---|
| 2475 | XMEMCPY(session->sslClient->arrays->clientRandom,
|
---|
| 2476 | session->sslServer->arrays->clientRandom, RAN_LEN);
|
---|
| 2477 |
|
---|
| 2478 | *sslBytes -= *rhSize;
|
---|
| 2479 | return 0;
|
---|
| 2480 | }
|
---|
| 2481 |
|
---|
| 2482 | #endif /* OLD_HELLO_ALLOWED */
|
---|
| 2483 |
|
---|
| 2484 |
|
---|
| 2485 | #if 0
|
---|
| 2486 | /* Calculate the TCP checksum, see RFC 1071 */
|
---|
| 2487 | /* return 0 for success, -1 on error */
|
---|
| 2488 | /* can be called from decode() with
|
---|
| 2489 | TcpChecksum(&ipInfo, &tcpInfo, sslBytes, packet + ipInfo.length);
|
---|
| 2490 | could also add a 64bit version if type available and using this
|
---|
| 2491 | */
|
---|
| 2492 | int TcpChecksum(IpInfo* ipInfo, TcpInfo* tcpInfo, int dataLen,
|
---|
| 2493 | const byte* packet)
|
---|
| 2494 | {
|
---|
| 2495 | TcpPseudoHdr pseudo;
|
---|
| 2496 | int count = PSEUDO_HDR_SZ;
|
---|
| 2497 | const word16* data = (word16*)&pseudo;
|
---|
| 2498 | word32 sum = 0;
|
---|
| 2499 | word16 checksum;
|
---|
| 2500 |
|
---|
| 2501 | pseudo.src = ipInfo->src;
|
---|
| 2502 | pseudo.dst = ipInfo->dst;
|
---|
| 2503 | pseudo.rsv = 0;
|
---|
| 2504 | pseudo.protocol = TCP_PROTO;
|
---|
| 2505 | pseudo.length = htons(tcpInfo->length + dataLen);
|
---|
| 2506 |
|
---|
| 2507 | /* pseudo header sum */
|
---|
| 2508 | while (count >= 2) {
|
---|
| 2509 | sum += *data++;
|
---|
| 2510 | count -= 2;
|
---|
| 2511 | }
|
---|
| 2512 |
|
---|
| 2513 | count = tcpInfo->length + dataLen;
|
---|
| 2514 | data = (word16*)packet;
|
---|
| 2515 |
|
---|
| 2516 | /* main sum */
|
---|
| 2517 | while (count > 1) {
|
---|
| 2518 | sum += *data++;
|
---|
| 2519 | count -=2;
|
---|
| 2520 | }
|
---|
| 2521 |
|
---|
| 2522 | /* get left-over, if any */
|
---|
| 2523 | packet = (byte*)data;
|
---|
| 2524 | if (count > 0) {
|
---|
| 2525 | sum += *packet;
|
---|
| 2526 | }
|
---|
| 2527 |
|
---|
| 2528 | /* fold 32bit sum into 16 bits */
|
---|
| 2529 | while (sum >> 16)
|
---|
| 2530 | sum = (sum & 0xffff) + (sum >> 16);
|
---|
| 2531 |
|
---|
| 2532 | checksum = (word16)~sum;
|
---|
| 2533 | /* checksum should now equal 0, since included already calcd checksum */
|
---|
| 2534 | /* field, but tcp checksum offloading could negate calculation */
|
---|
| 2535 | if (checksum == 0)
|
---|
| 2536 | return 0;
|
---|
| 2537 | return -1;
|
---|
| 2538 | }
|
---|
| 2539 | #endif
|
---|
| 2540 |
|
---|
| 2541 |
|
---|
| 2542 | /* Check IP and TCP headers, set payload */
|
---|
| 2543 | /* returns 0 on success, -1 on error */
|
---|
| 2544 | static int CheckHeaders(IpInfo* ipInfo, TcpInfo* tcpInfo, const byte* packet,
|
---|
| 2545 | int length, const byte** sslFrame, int* sslBytes, char* error)
|
---|
| 2546 | {
|
---|
| 2547 | TraceHeader();
|
---|
| 2548 | TracePacket();
|
---|
| 2549 |
|
---|
| 2550 | /* ip header */
|
---|
| 2551 | if (length < IP_HDR_SZ) {
|
---|
| 2552 | SetError(PACKET_HDR_SHORT_STR, error, NULL, 0);
|
---|
| 2553 | return -1;
|
---|
| 2554 | }
|
---|
| 2555 | if (CheckIpHdr((IpHdr*)packet, ipInfo, length, error) != 0)
|
---|
| 2556 | return -1;
|
---|
| 2557 |
|
---|
| 2558 | /* tcp header */
|
---|
| 2559 | if (length < (ipInfo->length + TCP_HDR_SZ)) {
|
---|
| 2560 | SetError(PACKET_HDR_SHORT_STR, error, NULL, 0);
|
---|
| 2561 | return -1;
|
---|
| 2562 | }
|
---|
| 2563 | if (CheckTcpHdr((TcpHdr*)(packet + ipInfo->length), tcpInfo, error) != 0)
|
---|
| 2564 | return -1;
|
---|
| 2565 |
|
---|
| 2566 | /* setup */
|
---|
| 2567 | *sslFrame = packet + ipInfo->length + tcpInfo->length;
|
---|
| 2568 | if (*sslFrame > packet + length) {
|
---|
| 2569 | SetError(PACKET_HDR_SHORT_STR, error, NULL, 0);
|
---|
| 2570 | return -1;
|
---|
| 2571 | }
|
---|
| 2572 | *sslBytes = (int)(packet + length - *sslFrame);
|
---|
| 2573 |
|
---|
| 2574 | return 0;
|
---|
| 2575 | }
|
---|
| 2576 |
|
---|
| 2577 |
|
---|
| 2578 | /* Create or Find existing session */
|
---|
| 2579 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */
|
---|
| 2580 | static int CheckSession(IpInfo* ipInfo, TcpInfo* tcpInfo, int sslBytes,
|
---|
| 2581 | SnifferSession** session, char* error)
|
---|
| 2582 | {
|
---|
| 2583 | /* create a new SnifferSession on client SYN */
|
---|
| 2584 | if (tcpInfo->syn && !tcpInfo->ack) {
|
---|
| 2585 | TraceClientSyn(tcpInfo->sequence);
|
---|
| 2586 | *session = CreateSession(ipInfo, tcpInfo, error);
|
---|
| 2587 | if (*session == NULL) {
|
---|
| 2588 | *session = GetSnifferSession(ipInfo, tcpInfo);
|
---|
| 2589 | /* already had existing, so OK */
|
---|
| 2590 | if (*session)
|
---|
| 2591 | return 1;
|
---|
| 2592 |
|
---|
| 2593 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
| 2594 | return -1;
|
---|
| 2595 | }
|
---|
| 2596 | return 1;
|
---|
| 2597 | }
|
---|
| 2598 | /* get existing sniffer session */
|
---|
| 2599 | else {
|
---|
| 2600 | *session = GetSnifferSession(ipInfo, tcpInfo);
|
---|
| 2601 | if (*session == NULL) {
|
---|
| 2602 | /* don't worry about extraneous RST or duplicate FINs */
|
---|
| 2603 | if (tcpInfo->fin || tcpInfo->rst)
|
---|
| 2604 | return 1;
|
---|
| 2605 | /* don't worry about duplicate ACKs either */
|
---|
| 2606 | if (sslBytes == 0 && tcpInfo->ack)
|
---|
| 2607 | return 1;
|
---|
| 2608 |
|
---|
| 2609 | SetError(BAD_SESSION_STR, error, NULL, 0);
|
---|
| 2610 | return -1;
|
---|
| 2611 | }
|
---|
| 2612 | }
|
---|
| 2613 | return 0;
|
---|
| 2614 | }
|
---|
| 2615 |
|
---|
| 2616 |
|
---|
| 2617 | /* Create a Packet Buffer from *begin - end, adjust new *begin and bytesLeft */
|
---|
| 2618 | static PacketBuffer* CreateBuffer(word32* begin, word32 end, const byte* data,
|
---|
| 2619 | int* bytesLeft)
|
---|
| 2620 | {
|
---|
| 2621 | PacketBuffer* pb;
|
---|
| 2622 |
|
---|
| 2623 | int added = end - *begin + 1;
|
---|
| 2624 | assert(*begin <= end);
|
---|
| 2625 |
|
---|
| 2626 | pb = (PacketBuffer*)malloc(sizeof(PacketBuffer));
|
---|
| 2627 | if (pb == NULL) return NULL;
|
---|
| 2628 |
|
---|
| 2629 | pb->next = 0;
|
---|
| 2630 | pb->begin = *begin;
|
---|
| 2631 | pb->end = end;
|
---|
| 2632 | pb->data = (byte*)malloc(added);
|
---|
| 2633 |
|
---|
| 2634 | if (pb->data == NULL) {
|
---|
| 2635 | free(pb);
|
---|
| 2636 | return NULL;
|
---|
| 2637 | }
|
---|
| 2638 | XMEMCPY(pb->data, data, added);
|
---|
| 2639 |
|
---|
| 2640 | *bytesLeft -= added;
|
---|
| 2641 | *begin = pb->end + 1;
|
---|
| 2642 |
|
---|
| 2643 | return pb;
|
---|
| 2644 | }
|
---|
| 2645 |
|
---|
| 2646 |
|
---|
| 2647 | /* Add sslFrame to Reassembly List */
|
---|
| 2648 | /* returns 1 (end) on success, -1, on error */
|
---|
| 2649 | static int AddToReassembly(byte from, word32 seq, const byte* sslFrame,
|
---|
| 2650 | int sslBytes, SnifferSession* session, char* error)
|
---|
| 2651 | {
|
---|
| 2652 | PacketBuffer* add;
|
---|
| 2653 | PacketBuffer** front = (from == WOLFSSL_SERVER_END) ?
|
---|
| 2654 | &session->cliReassemblyList: &session->srvReassemblyList;
|
---|
| 2655 | PacketBuffer* curr = *front;
|
---|
| 2656 | PacketBuffer* prev = curr;
|
---|
| 2657 |
|
---|
| 2658 | word32* reassemblyMemory = (from == WOLFSSL_SERVER_END) ?
|
---|
| 2659 | &session->cliReassemblyMemory : &session->srvReassemblyMemory;
|
---|
| 2660 | word32 startSeq = seq;
|
---|
| 2661 | word32 added;
|
---|
| 2662 | int bytesLeft = sslBytes; /* could be overlapping fragment */
|
---|
| 2663 |
|
---|
| 2664 | /* if list is empty add full frame to front */
|
---|
| 2665 | if (!curr) {
|
---|
| 2666 | if (MaxRecoveryMemory != -1 &&
|
---|
| 2667 | (int)(*reassemblyMemory + sslBytes) > MaxRecoveryMemory) {
|
---|
| 2668 | SetError(REASSEMBLY_MAX_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2669 | return -1;
|
---|
| 2670 | }
|
---|
| 2671 | add = CreateBuffer(&seq, seq + sslBytes - 1, sslFrame, &bytesLeft);
|
---|
| 2672 | if (add == NULL) {
|
---|
| 2673 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2674 | return -1;
|
---|
| 2675 | }
|
---|
| 2676 | *front = add;
|
---|
| 2677 | *reassemblyMemory += sslBytes;
|
---|
| 2678 | return 1;
|
---|
| 2679 | }
|
---|
| 2680 |
|
---|
| 2681 | /* add to front if before current front, up to next->begin */
|
---|
| 2682 | if (seq < curr->begin) {
|
---|
| 2683 | word32 end = seq + sslBytes - 1;
|
---|
| 2684 |
|
---|
| 2685 | if (end >= curr->begin)
|
---|
| 2686 | end = curr->begin - 1;
|
---|
| 2687 |
|
---|
| 2688 | if (MaxRecoveryMemory -1 &&
|
---|
| 2689 | (int)(*reassemblyMemory + sslBytes) > MaxRecoveryMemory) {
|
---|
| 2690 | SetError(REASSEMBLY_MAX_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2691 | return -1;
|
---|
| 2692 | }
|
---|
| 2693 | add = CreateBuffer(&seq, end, sslFrame, &bytesLeft);
|
---|
| 2694 | if (add == NULL) {
|
---|
| 2695 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2696 | return -1;
|
---|
| 2697 | }
|
---|
| 2698 | add->next = curr;
|
---|
| 2699 | *front = add;
|
---|
| 2700 | *reassemblyMemory += sslBytes;
|
---|
| 2701 | }
|
---|
| 2702 |
|
---|
| 2703 | /* while we have bytes left, try to find a gap to fill */
|
---|
| 2704 | while (bytesLeft > 0) {
|
---|
| 2705 | /* get previous packet in list */
|
---|
| 2706 | while (curr && (seq >= curr->begin)) {
|
---|
| 2707 | prev = curr;
|
---|
| 2708 | curr = curr->next;
|
---|
| 2709 | }
|
---|
| 2710 |
|
---|
| 2711 | /* don't add duplicate data */
|
---|
| 2712 | if (prev->end >= seq) {
|
---|
| 2713 | if ( (seq + bytesLeft - 1) <= prev->end)
|
---|
| 2714 | return 1;
|
---|
| 2715 | seq = prev->end + 1;
|
---|
| 2716 | bytesLeft = startSeq + sslBytes - seq;
|
---|
| 2717 | }
|
---|
| 2718 |
|
---|
| 2719 | if (!curr)
|
---|
| 2720 | /* we're at the end */
|
---|
| 2721 | added = bytesLeft;
|
---|
| 2722 | else
|
---|
| 2723 | /* we're in between two frames */
|
---|
| 2724 | added = min((word32)bytesLeft, curr->begin - seq);
|
---|
| 2725 |
|
---|
| 2726 | /* data already there */
|
---|
| 2727 | if (added == 0)
|
---|
| 2728 | continue;
|
---|
| 2729 |
|
---|
| 2730 | if (MaxRecoveryMemory != -1 &&
|
---|
| 2731 | (int)(*reassemblyMemory + added) > MaxRecoveryMemory) {
|
---|
| 2732 | SetError(REASSEMBLY_MAX_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2733 | return -1;
|
---|
| 2734 | }
|
---|
| 2735 | add = CreateBuffer(&seq, seq + added - 1, &sslFrame[seq - startSeq],
|
---|
| 2736 | &bytesLeft);
|
---|
| 2737 | if (add == NULL) {
|
---|
| 2738 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2739 | return -1;
|
---|
| 2740 | }
|
---|
| 2741 | add->next = prev->next;
|
---|
| 2742 | prev->next = add;
|
---|
| 2743 | *reassemblyMemory += added;
|
---|
| 2744 | }
|
---|
| 2745 | return 1;
|
---|
| 2746 | }
|
---|
| 2747 |
|
---|
| 2748 |
|
---|
| 2749 | /* Add out of order FIN capture */
|
---|
| 2750 | /* returns 1 for success (end) */
|
---|
| 2751 | static int AddFinCapture(SnifferSession* session, word32 sequence)
|
---|
| 2752 | {
|
---|
| 2753 | if (session->flags.side == WOLFSSL_SERVER_END) {
|
---|
| 2754 | if (session->finCaputre.cliCounted == 0)
|
---|
| 2755 | session->finCaputre.cliFinSeq = sequence;
|
---|
| 2756 | }
|
---|
| 2757 | else {
|
---|
| 2758 | if (session->finCaputre.srvCounted == 0)
|
---|
| 2759 | session->finCaputre.srvFinSeq = sequence;
|
---|
| 2760 | }
|
---|
| 2761 | return 1;
|
---|
| 2762 | }
|
---|
| 2763 |
|
---|
| 2764 |
|
---|
| 2765 | /* Adjust incoming sequence based on side */
|
---|
| 2766 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */
|
---|
| 2767 | static int AdjustSequence(TcpInfo* tcpInfo, SnifferSession* session,
|
---|
| 2768 | int* sslBytes, const byte** sslFrame, char* error)
|
---|
| 2769 | {
|
---|
| 2770 | word32 seqStart = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2771 | session->cliSeqStart :session->srvSeqStart;
|
---|
| 2772 | word32 real = tcpInfo->sequence - seqStart;
|
---|
| 2773 | word32* expected = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2774 | &session->cliExpected : &session->srvExpected;
|
---|
| 2775 | PacketBuffer* reassemblyList = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2776 | session->cliReassemblyList : session->srvReassemblyList;
|
---|
| 2777 | byte skipPartial = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2778 | session->flags.srvSkipPartial :
|
---|
| 2779 | session->flags.cliSkipPartial;
|
---|
| 2780 |
|
---|
| 2781 | /* handle rollover of sequence */
|
---|
| 2782 | if (tcpInfo->sequence < seqStart)
|
---|
| 2783 | real = 0xffffffffU - seqStart + tcpInfo->sequence;
|
---|
| 2784 |
|
---|
| 2785 | TraceRelativeSequence(*expected, real);
|
---|
| 2786 |
|
---|
| 2787 | if (real < *expected) {
|
---|
| 2788 | Trace(DUPLICATE_STR);
|
---|
| 2789 | if (real + *sslBytes > *expected) {
|
---|
| 2790 | int overlap = *expected - real;
|
---|
| 2791 | Trace(OVERLAP_DUPLICATE_STR);
|
---|
| 2792 |
|
---|
| 2793 | /* adjust to expected, remove duplicate */
|
---|
| 2794 | *sslFrame += overlap;
|
---|
| 2795 | *sslBytes -= overlap;
|
---|
| 2796 |
|
---|
| 2797 | /* The following conditional block is duplicated below. It is the
|
---|
| 2798 | * same action but for a different setup case. If changing this
|
---|
| 2799 | * block be sure to also update the block below. */
|
---|
| 2800 | if (reassemblyList) {
|
---|
| 2801 | word32 newEnd = *expected + *sslBytes;
|
---|
| 2802 |
|
---|
| 2803 | if (newEnd > reassemblyList->begin) {
|
---|
| 2804 | Trace(OVERLAP_REASSEMBLY_BEGIN_STR);
|
---|
| 2805 |
|
---|
| 2806 | /* remove bytes already on reassembly list */
|
---|
| 2807 | *sslBytes -= newEnd - reassemblyList->begin;
|
---|
| 2808 | }
|
---|
| 2809 | if (newEnd > reassemblyList->end) {
|
---|
| 2810 | Trace(OVERLAP_REASSEMBLY_END_STR);
|
---|
| 2811 |
|
---|
| 2812 | /* may be past reassembly list end (could have more on list)
|
---|
| 2813 | so try to add what's past the front->end */
|
---|
| 2814 | AddToReassembly(session->flags.side, reassemblyList->end +1,
|
---|
| 2815 | *sslFrame + reassemblyList->end - *expected + 1,
|
---|
| 2816 | newEnd - reassemblyList->end, session, error);
|
---|
| 2817 | }
|
---|
| 2818 | }
|
---|
| 2819 | }
|
---|
| 2820 | else
|
---|
| 2821 | return 1;
|
---|
| 2822 | }
|
---|
| 2823 | else if (real > *expected) {
|
---|
| 2824 | Trace(OUT_OF_ORDER_STR);
|
---|
| 2825 | if (*sslBytes > 0) {
|
---|
| 2826 | int addResult = AddToReassembly(session->flags.side, real,
|
---|
| 2827 | *sslFrame, *sslBytes, session, error);
|
---|
| 2828 | if (skipPartial) {
|
---|
| 2829 | *sslBytes = 0;
|
---|
| 2830 | return 0;
|
---|
| 2831 | }
|
---|
| 2832 | else
|
---|
| 2833 | return addResult;
|
---|
| 2834 | }
|
---|
| 2835 | else if (tcpInfo->fin)
|
---|
| 2836 | return AddFinCapture(session, real);
|
---|
| 2837 | }
|
---|
| 2838 | else if (*sslBytes > 0) {
|
---|
| 2839 | if (skipPartial) {
|
---|
| 2840 | AddToReassembly(session->flags.side, real,
|
---|
| 2841 | *sslFrame, *sslBytes, session, error);
|
---|
| 2842 | *expected += *sslBytes;
|
---|
| 2843 | *sslBytes = 0;
|
---|
| 2844 | if (tcpInfo->fin)
|
---|
| 2845 | *expected += 1;
|
---|
| 2846 | return 0;
|
---|
| 2847 | }
|
---|
| 2848 | /* The following conditional block is duplicated above. It is the
|
---|
| 2849 | * same action but for a different setup case. If changing this
|
---|
| 2850 | * block be sure to also update the block above. */
|
---|
| 2851 | else if (reassemblyList) {
|
---|
| 2852 | word32 newEnd = *expected + *sslBytes;
|
---|
| 2853 |
|
---|
| 2854 | if (newEnd > reassemblyList->begin) {
|
---|
| 2855 | Trace(OVERLAP_REASSEMBLY_BEGIN_STR);
|
---|
| 2856 |
|
---|
| 2857 | /* remove bytes already on reassembly list */
|
---|
| 2858 | *sslBytes -= newEnd - reassemblyList->begin;
|
---|
| 2859 | }
|
---|
| 2860 | if (newEnd > reassemblyList->end) {
|
---|
| 2861 | Trace(OVERLAP_REASSEMBLY_END_STR);
|
---|
| 2862 |
|
---|
| 2863 | /* may be past reassembly list end (could have more on list)
|
---|
| 2864 | so try to add what's past the front->end */
|
---|
| 2865 | AddToReassembly(session->flags.side, reassemblyList->end +1,
|
---|
| 2866 | *sslFrame + reassemblyList->end - *expected + 1,
|
---|
| 2867 | newEnd - reassemblyList->end, session, error);
|
---|
| 2868 | }
|
---|
| 2869 | }
|
---|
| 2870 | }
|
---|
| 2871 | /* got expected sequence */
|
---|
| 2872 | *expected += *sslBytes;
|
---|
| 2873 | if (tcpInfo->fin)
|
---|
| 2874 | *expected += 1;
|
---|
| 2875 |
|
---|
| 2876 | return 0;
|
---|
| 2877 | }
|
---|
| 2878 |
|
---|
| 2879 |
|
---|
| 2880 | static int FindNextRecordInAssembly(SnifferSession* session,
|
---|
| 2881 | const byte** sslFrame, int* sslBytes,
|
---|
| 2882 | const byte** end, char* error)
|
---|
| 2883 | {
|
---|
| 2884 | PacketBuffer** front = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2885 | &session->cliReassemblyList :
|
---|
| 2886 | &session->srvReassemblyList;
|
---|
| 2887 | PacketBuffer* curr = *front;
|
---|
| 2888 | PacketBuffer* prev = NULL;
|
---|
| 2889 | byte* skipPartial = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2890 | &session->flags.srvSkipPartial :
|
---|
| 2891 | &session->flags.cliSkipPartial;
|
---|
| 2892 | word32* reassemblyMemory = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2893 | &session->cliReassemblyMemory :
|
---|
| 2894 | &session->srvReassemblyMemory;
|
---|
| 2895 | SSL* ssl = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2896 | session->sslServer :
|
---|
| 2897 | session->sslClient;
|
---|
| 2898 | ProtocolVersion pv = ssl->version;
|
---|
| 2899 | word32* expected = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2900 | &session->cliExpected :
|
---|
| 2901 | &session->srvExpected;
|
---|
| 2902 |
|
---|
| 2903 | while (curr != NULL) {
|
---|
| 2904 | *expected = curr->end + 1;
|
---|
| 2905 |
|
---|
| 2906 | if (curr->data[0] == application_data &&
|
---|
| 2907 | curr->data[1] == pv.major &&
|
---|
| 2908 | curr->data[2] == pv.minor) {
|
---|
| 2909 |
|
---|
| 2910 | if (ssl->buffers.inputBuffer.length > 0)
|
---|
| 2911 | Trace(DROPPING_PARTIAL_RECORD);
|
---|
| 2912 |
|
---|
| 2913 | *sslBytes = curr->end - curr->begin + 1;
|
---|
| 2914 | if ( (word32)*sslBytes > ssl->buffers.inputBuffer.bufferSize) {
|
---|
| 2915 | if (GrowInputBuffer(ssl, *sslBytes, 0) < 0) {
|
---|
| 2916 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2917 | return -1;
|
---|
| 2918 | }
|
---|
| 2919 | }
|
---|
| 2920 |
|
---|
| 2921 | XMEMCPY(ssl->buffers.inputBuffer.buffer, curr->data, *sslBytes);
|
---|
| 2922 |
|
---|
| 2923 | *front = curr->next;
|
---|
| 2924 | *reassemblyMemory -= *sslBytes;
|
---|
| 2925 | FreePacketBuffer(curr);
|
---|
| 2926 |
|
---|
| 2927 | ssl->buffers.inputBuffer.length = *sslBytes;
|
---|
| 2928 | *sslFrame = ssl->buffers.inputBuffer.buffer;
|
---|
| 2929 | *end = *sslFrame + *sslBytes;
|
---|
| 2930 | *skipPartial = 0;
|
---|
| 2931 |
|
---|
| 2932 | return 0;
|
---|
| 2933 | }
|
---|
| 2934 | else if (ssl->specs.cipher_type == block) {
|
---|
| 2935 | if (ssl->specs.bulk_cipher_algorithm == wolfssl_aes) {
|
---|
| 2936 | #ifdef BUILD_AES
|
---|
| 2937 | wc_AesSetIV(ssl->decrypt.aes,
|
---|
| 2938 | curr->data + curr->end - curr->begin
|
---|
| 2939 | - ssl->specs.block_size + 1);
|
---|
| 2940 | #endif
|
---|
| 2941 | }
|
---|
| 2942 | else if (ssl->specs.bulk_cipher_algorithm == wolfssl_triple_des) {
|
---|
| 2943 | #ifdef BUILD_DES3
|
---|
| 2944 | wc_Des3_SetIV(ssl->decrypt.des3,
|
---|
| 2945 | curr->data + curr->end - curr->begin
|
---|
| 2946 | - ssl->specs.block_size + 1);
|
---|
| 2947 | #endif
|
---|
| 2948 | }
|
---|
| 2949 | }
|
---|
| 2950 |
|
---|
| 2951 | Trace(DROPPING_LOST_FRAG_STR);
|
---|
| 2952 | prev = curr;
|
---|
| 2953 | curr = curr->next;
|
---|
| 2954 | *reassemblyMemory -= (prev->end - prev->begin + 1);
|
---|
| 2955 | FreePacketBuffer(prev);
|
---|
| 2956 | }
|
---|
| 2957 |
|
---|
| 2958 | *front = curr;
|
---|
| 2959 |
|
---|
| 2960 | return 0;
|
---|
| 2961 | }
|
---|
| 2962 |
|
---|
| 2963 |
|
---|
| 2964 | static int FixSequence(TcpInfo* tcpInfo, SnifferSession* session)
|
---|
| 2965 | {
|
---|
| 2966 | word32* expected = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2967 | &session->srvExpected : &session->cliExpected;
|
---|
| 2968 | PacketBuffer* list = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2969 | session->srvReassemblyList :
|
---|
| 2970 | session->cliReassemblyList;
|
---|
| 2971 | byte* skipPartial = (session->flags.side != WOLFSSL_SERVER_END) ?
|
---|
| 2972 | &session->flags.srvSkipPartial :
|
---|
| 2973 | &session->flags.cliSkipPartial;
|
---|
| 2974 |
|
---|
| 2975 | *skipPartial = 1;
|
---|
| 2976 | if (list != NULL)
|
---|
| 2977 | *expected = list->begin;
|
---|
| 2978 | else {
|
---|
| 2979 | word32 seqStart = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2980 | session->srvSeqStart : session->cliSeqStart;
|
---|
| 2981 | word32 real = tcpInfo->ackNumber - seqStart;
|
---|
| 2982 |
|
---|
| 2983 | *expected = real;
|
---|
| 2984 | }
|
---|
| 2985 |
|
---|
| 2986 | return 1;
|
---|
| 2987 | }
|
---|
| 2988 |
|
---|
| 2989 |
|
---|
| 2990 | /* Check latest ack number for missing packets
|
---|
| 2991 | return 0 ok, <0 on error */
|
---|
| 2992 | static int CheckAck(TcpInfo* tcpInfo, SnifferSession* session)
|
---|
| 2993 | {
|
---|
| 2994 | if (tcpInfo->ack) {
|
---|
| 2995 | word32 seqStart = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2996 | session->srvSeqStart :session->cliSeqStart;
|
---|
| 2997 | word32 real = tcpInfo->ackNumber - seqStart;
|
---|
| 2998 | word32 expected = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2999 | session->srvExpected : session->cliExpected;
|
---|
| 3000 |
|
---|
| 3001 | /* handle rollover of sequence */
|
---|
| 3002 | if (tcpInfo->ackNumber < seqStart)
|
---|
| 3003 | real = 0xffffffffU - seqStart + tcpInfo->ackNumber;
|
---|
| 3004 |
|
---|
| 3005 | TraceAck(real, expected);
|
---|
| 3006 |
|
---|
| 3007 | if (real > expected)
|
---|
| 3008 | return -1; /* we missed a packet, ACKing data we never saw */
|
---|
| 3009 | }
|
---|
| 3010 | return 0;
|
---|
| 3011 | }
|
---|
| 3012 |
|
---|
| 3013 |
|
---|
| 3014 | /* Check TCP Sequence status */
|
---|
| 3015 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */
|
---|
| 3016 | static int CheckSequence(IpInfo* ipInfo, TcpInfo* tcpInfo,
|
---|
| 3017 | SnifferSession* session, int* sslBytes,
|
---|
| 3018 | const byte** sslFrame, char* error)
|
---|
| 3019 | {
|
---|
| 3020 | int actualLen;
|
---|
| 3021 | byte* ackFault = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 3022 | &session->flags.cliAckFault :
|
---|
| 3023 | &session->flags.srvAckFault;
|
---|
| 3024 |
|
---|
| 3025 | /* init SEQ from server to client */
|
---|
| 3026 | if (tcpInfo->syn && tcpInfo->ack) {
|
---|
| 3027 | session->srvSeqStart = tcpInfo->sequence;
|
---|
| 3028 | session->srvExpected = 1;
|
---|
| 3029 | TraceServerSyn(tcpInfo->sequence);
|
---|
| 3030 | return 1;
|
---|
| 3031 | }
|
---|
| 3032 |
|
---|
| 3033 | /* adjust potential ethernet trailer */
|
---|
| 3034 | actualLen = ipInfo->total - ipInfo->length - tcpInfo->length;
|
---|
| 3035 | if (*sslBytes > actualLen) {
|
---|
| 3036 | *sslBytes = actualLen;
|
---|
| 3037 | }
|
---|
| 3038 |
|
---|
| 3039 | TraceSequence(tcpInfo->sequence, *sslBytes);
|
---|
| 3040 | if (CheckAck(tcpInfo, session) < 0) {
|
---|
| 3041 | if (!RecoveryEnabled) {
|
---|
| 3042 | UpdateMissedDataSessions();
|
---|
| 3043 | SetError(ACK_MISSED_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 3044 | return -1;
|
---|
| 3045 | }
|
---|
| 3046 | else {
|
---|
| 3047 | SetError(ACK_MISSED_STR, error, session, 0);
|
---|
| 3048 | if (*ackFault == 0) {
|
---|
| 3049 | *ackFault = 1;
|
---|
| 3050 | UpdateMissedDataSessions();
|
---|
| 3051 | }
|
---|
| 3052 | return FixSequence(tcpInfo, session);
|
---|
| 3053 | }
|
---|
| 3054 | }
|
---|
| 3055 |
|
---|
| 3056 | if (*ackFault) {
|
---|
| 3057 | Trace(CLEAR_ACK_FAULT);
|
---|
| 3058 | *ackFault = 0;
|
---|
| 3059 | }
|
---|
| 3060 |
|
---|
| 3061 | return AdjustSequence(tcpInfo, session, sslBytes, sslFrame, error);
|
---|
| 3062 | }
|
---|
| 3063 |
|
---|
| 3064 |
|
---|
| 3065 | /* Check Status before record processing */
|
---|
| 3066 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */
|
---|
| 3067 | static int CheckPreRecord(IpInfo* ipInfo, TcpInfo* tcpInfo,
|
---|
| 3068 | const byte** sslFrame, SnifferSession** session,
|
---|
| 3069 | int* sslBytes, const byte** end, char* error)
|
---|
| 3070 | {
|
---|
| 3071 | word32 length;
|
---|
| 3072 | SSL* ssl = ((*session)->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 3073 | (*session)->sslServer : (*session)->sslClient;
|
---|
| 3074 | byte skipPartial = ((*session)->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 3075 | (*session)->flags.srvSkipPartial :
|
---|
| 3076 | (*session)->flags.cliSkipPartial;
|
---|
| 3077 | /* remove SnifferSession on 2nd FIN or RST */
|
---|
| 3078 | if (tcpInfo->fin || tcpInfo->rst) {
|
---|
| 3079 | /* flag FIN and RST */
|
---|
| 3080 | if (tcpInfo->fin)
|
---|
| 3081 | (*session)->flags.finCount += 1;
|
---|
| 3082 | else if (tcpInfo->rst)
|
---|
| 3083 | (*session)->flags.finCount += 2;
|
---|
| 3084 |
|
---|
| 3085 | if ((*session)->flags.finCount >= 2) {
|
---|
| 3086 | RemoveSession(*session, ipInfo, tcpInfo, 0);
|
---|
| 3087 | *session = NULL;
|
---|
| 3088 | return 1;
|
---|
| 3089 | }
|
---|
| 3090 | }
|
---|
| 3091 |
|
---|
| 3092 | if ((*session)->flags.fatalError == FATAL_ERROR_STATE) {
|
---|
| 3093 | SetError(FATAL_ERROR_STR, error, NULL, 0);
|
---|
| 3094 | return -1;
|
---|
| 3095 | }
|
---|
| 3096 |
|
---|
| 3097 | if (skipPartial) {
|
---|
| 3098 | if (FindNextRecordInAssembly(*session,
|
---|
| 3099 | sslFrame, sslBytes, end, error) < 0) {
|
---|
| 3100 | return -1;
|
---|
| 3101 | }
|
---|
| 3102 | }
|
---|
| 3103 |
|
---|
| 3104 | if (*sslBytes == 0) {
|
---|
| 3105 | Trace(NO_DATA_STR);
|
---|
| 3106 | return 1;
|
---|
| 3107 | }
|
---|
| 3108 |
|
---|
| 3109 | /* if current partial data, add to end of partial */
|
---|
| 3110 | /* if skipping, the data is already at the end of partial */
|
---|
| 3111 | if ( !skipPartial &&
|
---|
| 3112 | (length = ssl->buffers.inputBuffer.length) ) {
|
---|
| 3113 | Trace(PARTIAL_ADD_STR);
|
---|
| 3114 |
|
---|
| 3115 | if ( (*sslBytes + length) > ssl->buffers.inputBuffer.bufferSize) {
|
---|
| 3116 | if (GrowInputBuffer(ssl, *sslBytes, length) < 0) {
|
---|
| 3117 | SetError(MEMORY_STR, error, *session, FATAL_ERROR_STATE);
|
---|
| 3118 | return -1;
|
---|
| 3119 | }
|
---|
| 3120 | }
|
---|
| 3121 | XMEMCPY(&ssl->buffers.inputBuffer.buffer[length], *sslFrame, *sslBytes);
|
---|
| 3122 | *sslBytes += length;
|
---|
| 3123 | ssl->buffers.inputBuffer.length = *sslBytes;
|
---|
| 3124 | *sslFrame = ssl->buffers.inputBuffer.buffer;
|
---|
| 3125 | *end = *sslFrame + *sslBytes;
|
---|
| 3126 | }
|
---|
| 3127 |
|
---|
| 3128 | if ((*session)->flags.clientHello == 0 && **sslFrame != handshake) {
|
---|
| 3129 | /* Sanity check the packet for an old style client hello. */
|
---|
| 3130 | int rhSize = (((*sslFrame)[0] & 0x7f) << 8) | ((*sslFrame)[1]);
|
---|
| 3131 |
|
---|
| 3132 | if ((rhSize <= (*sslBytes - 2)) &&
|
---|
| 3133 | (*sslFrame)[2] == OLD_HELLO_ID && (*sslFrame)[3] == SSLv3_MAJOR) {
|
---|
| 3134 | #ifdef OLD_HELLO_ALLOWED
|
---|
| 3135 | int ret = DoOldHello(*session, *sslFrame, &rhSize, sslBytes, error);
|
---|
| 3136 | if (ret < 0)
|
---|
| 3137 | return -1; /* error already set */
|
---|
| 3138 | if (*sslBytes <= 0)
|
---|
| 3139 | return 1;
|
---|
| 3140 | #endif
|
---|
| 3141 | }
|
---|
| 3142 | else {
|
---|
| 3143 | #ifdef STARTTLS_ALLOWED
|
---|
| 3144 | return 1;
|
---|
| 3145 | #endif
|
---|
| 3146 | }
|
---|
| 3147 | }
|
---|
| 3148 |
|
---|
| 3149 | return 0;
|
---|
| 3150 | }
|
---|
| 3151 |
|
---|
| 3152 |
|
---|
| 3153 | /* See if input on the reassembly list is ready for consuming */
|
---|
| 3154 | /* returns 1 for TRUE, 0 for FALSE */
|
---|
| 3155 | static int HaveMoreInput(SnifferSession* session, const byte** sslFrame,
|
---|
| 3156 | int* sslBytes, const byte** end, char* error)
|
---|
| 3157 | {
|
---|
| 3158 | /* sequence and reassembly based on from, not to */
|
---|
| 3159 | int moreInput = 0;
|
---|
| 3160 | PacketBuffer** front = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 3161 | &session->cliReassemblyList : &session->srvReassemblyList;
|
---|
| 3162 | word32* expected = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 3163 | &session->cliExpected : &session->srvExpected;
|
---|
| 3164 | /* buffer is on receiving end */
|
---|
| 3165 | word32* length = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 3166 | &session->sslServer->buffers.inputBuffer.length :
|
---|
| 3167 | &session->sslClient->buffers.inputBuffer.length;
|
---|
| 3168 | byte** myBuffer = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 3169 | &session->sslServer->buffers.inputBuffer.buffer :
|
---|
| 3170 | &session->sslClient->buffers.inputBuffer.buffer;
|
---|
| 3171 | word32* bufferSize = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 3172 | &session->sslServer->buffers.inputBuffer.bufferSize :
|
---|
| 3173 | &session->sslClient->buffers.inputBuffer.bufferSize;
|
---|
| 3174 | SSL* ssl = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 3175 | session->sslServer : session->sslClient;
|
---|
| 3176 | word32* reassemblyMemory = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 3177 | &session->cliReassemblyMemory : &session->srvReassemblyMemory;
|
---|
| 3178 |
|
---|
| 3179 | while (*front && ((*front)->begin == *expected) ) {
|
---|
| 3180 | word32 room = *bufferSize - *length;
|
---|
| 3181 | word32 packetLen = (*front)->end - (*front)->begin + 1;
|
---|
| 3182 |
|
---|
| 3183 | if (packetLen > room && *bufferSize < MAX_INPUT_SZ) {
|
---|
| 3184 | if (GrowInputBuffer(ssl, packetLen, *length) < 0) {
|
---|
| 3185 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 3186 | return 0;
|
---|
| 3187 | }
|
---|
| 3188 | room = *bufferSize - *length; /* bufferSize is now bigger */
|
---|
| 3189 | }
|
---|
| 3190 |
|
---|
| 3191 | if (packetLen <= room) {
|
---|
| 3192 | PacketBuffer* del = *front;
|
---|
| 3193 | byte* buf = *myBuffer;
|
---|
| 3194 |
|
---|
| 3195 | XMEMCPY(&buf[*length], (*front)->data, packetLen);
|
---|
| 3196 | *length += packetLen;
|
---|
| 3197 | *expected += packetLen;
|
---|
| 3198 |
|
---|
| 3199 | /* remove used packet */
|
---|
| 3200 | *front = (*front)->next;
|
---|
| 3201 |
|
---|
| 3202 | *reassemblyMemory -= packetLen;
|
---|
| 3203 | FreePacketBuffer(del);
|
---|
| 3204 |
|
---|
| 3205 | moreInput = 1;
|
---|
| 3206 | }
|
---|
| 3207 | else
|
---|
| 3208 | break;
|
---|
| 3209 | }
|
---|
| 3210 | if (moreInput) {
|
---|
| 3211 | *sslFrame = *myBuffer;
|
---|
| 3212 | *sslBytes = *length;
|
---|
| 3213 | *end = *myBuffer + *length;
|
---|
| 3214 | }
|
---|
| 3215 | return moreInput;
|
---|
| 3216 | }
|
---|
| 3217 |
|
---|
| 3218 |
|
---|
| 3219 |
|
---|
| 3220 | /* Process Message(s) from sslFrame */
|
---|
| 3221 | /* return Number of bytes on success, 0 for no data yet, and -1 on error */
|
---|
| 3222 | static int ProcessMessage(const byte* sslFrame, SnifferSession* session,
|
---|
| 3223 | int sslBytes, byte** data, const byte* end,
|
---|
| 3224 | char* error)
|
---|
| 3225 | {
|
---|
| 3226 | const byte* sslBegin = sslFrame;
|
---|
| 3227 | const byte* recordEnd; /* end of record indicator */
|
---|
| 3228 | const byte* inRecordEnd; /* indicator from input stream not decrypt */
|
---|
| 3229 | RecordLayerHeader rh;
|
---|
| 3230 | int rhSize = 0;
|
---|
| 3231 | int ret;
|
---|
| 3232 | int errCode = 0;
|
---|
| 3233 | int decoded = 0; /* bytes stored for user in data */
|
---|
| 3234 | int notEnough; /* notEnough bytes yet flag */
|
---|
| 3235 | int decrypted = 0; /* was current msg decrypted */
|
---|
| 3236 | SSL* ssl = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 3237 | session->sslServer : session->sslClient;
|
---|
| 3238 | doMessage:
|
---|
| 3239 | notEnough = 0;
|
---|
| 3240 | if (sslBytes < 0) {
|
---|
| 3241 | SetError(PACKET_HDR_SHORT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 3242 | return -1;
|
---|
| 3243 | }
|
---|
| 3244 | if (sslBytes >= RECORD_HEADER_SZ) {
|
---|
| 3245 | if (GetRecordHeader(sslFrame, &rh, &rhSize) != 0) {
|
---|
| 3246 | SetError(BAD_RECORD_HDR_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 3247 | return -1;
|
---|
| 3248 | }
|
---|
| 3249 | }
|
---|
| 3250 | else
|
---|
| 3251 | notEnough = 1;
|
---|
| 3252 |
|
---|
| 3253 | if (notEnough || rhSize > (sslBytes - RECORD_HEADER_SZ)) {
|
---|
| 3254 | /* don't have enough input yet to process full SSL record */
|
---|
| 3255 | Trace(PARTIAL_INPUT_STR);
|
---|
| 3256 |
|
---|
| 3257 | /* store partial if not there already or we advanced */
|
---|
| 3258 | if (ssl->buffers.inputBuffer.length == 0 || sslBegin != sslFrame) {
|
---|
| 3259 | if (sslBytes > (int)ssl->buffers.inputBuffer.bufferSize) {
|
---|
| 3260 | if (GrowInputBuffer(ssl, sslBytes, 0) < 0) {
|
---|
| 3261 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 3262 | return -1;
|
---|
| 3263 | }
|
---|
| 3264 | }
|
---|
| 3265 | XMEMMOVE(ssl->buffers.inputBuffer.buffer, sslFrame, sslBytes);
|
---|
| 3266 | ssl->buffers.inputBuffer.length = sslBytes;
|
---|
| 3267 | }
|
---|
| 3268 | if (HaveMoreInput(session, &sslFrame, &sslBytes, &end, error))
|
---|
| 3269 | goto doMessage;
|
---|
| 3270 | return decoded;
|
---|
| 3271 | }
|
---|
| 3272 | sslFrame += RECORD_HEADER_SZ;
|
---|
| 3273 | sslBytes -= RECORD_HEADER_SZ;
|
---|
| 3274 | recordEnd = sslFrame + rhSize; /* may have more than one record */
|
---|
| 3275 | inRecordEnd = recordEnd;
|
---|
| 3276 |
|
---|
| 3277 | /* decrypt if needed */
|
---|
| 3278 | if ((session->flags.side == WOLFSSL_SERVER_END &&
|
---|
| 3279 | session->flags.serverCipherOn)
|
---|
| 3280 | || (session->flags.side == WOLFSSL_CLIENT_END &&
|
---|
| 3281 | session->flags.clientCipherOn)) {
|
---|
| 3282 | int ivAdvance = 0; /* TLSv1.1 advance amount */
|
---|
| 3283 | if (ssl->decrypt.setup != 1) {
|
---|
| 3284 | SetError(DECRYPT_KEYS_NOT_SETUP, error, session, FATAL_ERROR_STATE);
|
---|
| 3285 | return -1;
|
---|
| 3286 | }
|
---|
| 3287 | if (CheckAvailableSize(ssl, rhSize) < 0) {
|
---|
| 3288 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 3289 | return -1;
|
---|
| 3290 | }
|
---|
| 3291 | sslFrame = DecryptMessage(ssl, sslFrame, rhSize,
|
---|
| 3292 | ssl->buffers.outputBuffer.buffer, &errCode,
|
---|
| 3293 | &ivAdvance);
|
---|
| 3294 | recordEnd = sslFrame - ivAdvance + rhSize; /* sslFrame moved so
|
---|
| 3295 | should recordEnd */
|
---|
| 3296 | decrypted = 1;
|
---|
| 3297 | if (errCode != 0) {
|
---|
| 3298 | SetError(BAD_DECRYPT, error, session, FATAL_ERROR_STATE);
|
---|
| 3299 | return -1;
|
---|
| 3300 | }
|
---|
| 3301 | }
|
---|
| 3302 |
|
---|
| 3303 | doPart:
|
---|
| 3304 |
|
---|
| 3305 | switch ((enum ContentType)rh.type) {
|
---|
| 3306 | case handshake:
|
---|
| 3307 | {
|
---|
| 3308 | int startIdx = sslBytes;
|
---|
| 3309 | int used;
|
---|
| 3310 |
|
---|
| 3311 | Trace(GOT_HANDSHAKE_STR);
|
---|
| 3312 | ret = DoHandShake(sslFrame, &sslBytes, session, error);
|
---|
| 3313 | if (ret != 0) {
|
---|
| 3314 | if (session->flags.fatalError == 0)
|
---|
| 3315 | SetError(BAD_HANDSHAKE_STR, error, session,
|
---|
| 3316 | FATAL_ERROR_STATE);
|
---|
| 3317 | return -1;
|
---|
| 3318 | }
|
---|
| 3319 |
|
---|
| 3320 | /* DoHandShake now fully decrements sslBytes to remaining */
|
---|
| 3321 | used = startIdx - sslBytes;
|
---|
| 3322 | sslFrame += used;
|
---|
| 3323 | if (decrypted)
|
---|
| 3324 | sslFrame += ssl->keys.padSz;
|
---|
| 3325 | }
|
---|
| 3326 | break;
|
---|
| 3327 | case change_cipher_spec:
|
---|
| 3328 | if (session->flags.side == WOLFSSL_SERVER_END)
|
---|
| 3329 | session->flags.serverCipherOn = 1;
|
---|
| 3330 | else
|
---|
| 3331 | session->flags.clientCipherOn = 1;
|
---|
| 3332 | Trace(GOT_CHANGE_CIPHER_STR);
|
---|
| 3333 | ssl->options.handShakeState = HANDSHAKE_DONE;
|
---|
| 3334 | ssl->options.handShakeDone = 1;
|
---|
| 3335 |
|
---|
| 3336 | sslFrame += 1;
|
---|
| 3337 | sslBytes -= 1;
|
---|
| 3338 |
|
---|
| 3339 | break;
|
---|
| 3340 | case application_data:
|
---|
| 3341 | Trace(GOT_APP_DATA_STR);
|
---|
| 3342 | {
|
---|
| 3343 | word32 inOutIdx = 0;
|
---|
| 3344 |
|
---|
| 3345 | ret = DoApplicationData(ssl, (byte*)sslFrame, &inOutIdx);
|
---|
| 3346 | if (ret == 0) {
|
---|
| 3347 | ret = ssl->buffers.clearOutputBuffer.length;
|
---|
| 3348 | TraceGotData(ret);
|
---|
| 3349 | if (ret) { /* may be blank message */
|
---|
| 3350 | byte* tmpData; /* don't leak on realloc free */
|
---|
| 3351 | /* add an extra byte at end of allocation in case user
|
---|
| 3352 | * wants to null terminate plaintext */
|
---|
| 3353 | tmpData = (byte*)realloc(*data, decoded + ret + 1);
|
---|
| 3354 | if (tmpData == NULL) {
|
---|
| 3355 | ForceZero(*data, decoded);
|
---|
| 3356 | free(*data);
|
---|
| 3357 | *data = NULL;
|
---|
| 3358 | SetError(MEMORY_STR, error, session,
|
---|
| 3359 | FATAL_ERROR_STATE);
|
---|
| 3360 | return -1;
|
---|
| 3361 | }
|
---|
| 3362 | *data = tmpData;
|
---|
| 3363 | XMEMCPY(*data + decoded,
|
---|
| 3364 | ssl->buffers.clearOutputBuffer.buffer, ret);
|
---|
| 3365 | TraceAddedData(ret, decoded);
|
---|
| 3366 | decoded += ret;
|
---|
| 3367 | ssl->buffers.clearOutputBuffer.length = 0;
|
---|
| 3368 | }
|
---|
| 3369 | }
|
---|
| 3370 | else {
|
---|
| 3371 | SetError(BAD_APP_DATA_STR, error,session,FATAL_ERROR_STATE);
|
---|
| 3372 | return -1;
|
---|
| 3373 | }
|
---|
| 3374 | if (ssl->buffers.outputBuffer.dynamicFlag)
|
---|
| 3375 | ShrinkOutputBuffer(ssl);
|
---|
| 3376 |
|
---|
| 3377 | sslFrame += inOutIdx;
|
---|
| 3378 | sslBytes -= inOutIdx;
|
---|
| 3379 | }
|
---|
| 3380 | break;
|
---|
| 3381 | case alert:
|
---|
| 3382 | Trace(GOT_ALERT_STR);
|
---|
| 3383 | sslFrame += rhSize;
|
---|
| 3384 | sslBytes -= rhSize;
|
---|
| 3385 | break;
|
---|
| 3386 | case no_type:
|
---|
| 3387 | default:
|
---|
| 3388 | SetError(GOT_UNKNOWN_RECORD_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 3389 | return -1;
|
---|
| 3390 | }
|
---|
| 3391 |
|
---|
| 3392 | /* do we have another msg in record ? */
|
---|
| 3393 | if (sslFrame < recordEnd) {
|
---|
| 3394 | Trace(ANOTHER_MSG_STR);
|
---|
| 3395 | goto doPart;
|
---|
| 3396 | }
|
---|
| 3397 |
|
---|
| 3398 | /* back to input stream instead of potential decrypt buffer */
|
---|
| 3399 | recordEnd = inRecordEnd;
|
---|
| 3400 |
|
---|
| 3401 | /* do we have more records ? */
|
---|
| 3402 | if (recordEnd < end) {
|
---|
| 3403 | Trace(ANOTHER_MSG_STR);
|
---|
| 3404 | sslFrame = recordEnd;
|
---|
| 3405 | sslBytes = (int)(end - recordEnd);
|
---|
| 3406 | goto doMessage;
|
---|
| 3407 | }
|
---|
| 3408 |
|
---|
| 3409 | /* clear used input */
|
---|
| 3410 | ssl->buffers.inputBuffer.length = 0;
|
---|
| 3411 |
|
---|
| 3412 | /* could have more input ready now */
|
---|
| 3413 | if (HaveMoreInput(session, &sslFrame, &sslBytes, &end, error))
|
---|
| 3414 | goto doMessage;
|
---|
| 3415 |
|
---|
| 3416 | if (ssl->buffers.inputBuffer.dynamicFlag)
|
---|
| 3417 | ShrinkInputBuffer(ssl, NO_FORCED_FREE);
|
---|
| 3418 |
|
---|
| 3419 | return decoded;
|
---|
| 3420 | }
|
---|
| 3421 |
|
---|
| 3422 |
|
---|
| 3423 | /* See if we need to process any pending FIN captures */
|
---|
| 3424 | static void CheckFinCapture(IpInfo* ipInfo, TcpInfo* tcpInfo,
|
---|
| 3425 | SnifferSession* session)
|
---|
| 3426 | {
|
---|
| 3427 | if (session->finCaputre.cliFinSeq && session->finCaputre.cliFinSeq <=
|
---|
| 3428 | session->cliExpected) {
|
---|
| 3429 | if (session->finCaputre.cliCounted == 0) {
|
---|
| 3430 | session->flags.finCount += 1;
|
---|
| 3431 | session->finCaputre.cliCounted = 1;
|
---|
| 3432 | TraceClientFin(session->finCaputre.cliFinSeq, session->cliExpected);
|
---|
| 3433 | }
|
---|
| 3434 | }
|
---|
| 3435 |
|
---|
| 3436 | if (session->finCaputre.srvFinSeq && session->finCaputre.srvFinSeq <=
|
---|
| 3437 | session->srvExpected) {
|
---|
| 3438 | if (session->finCaputre.srvCounted == 0) {
|
---|
| 3439 | session->flags.finCount += 1;
|
---|
| 3440 | session->finCaputre.srvCounted = 1;
|
---|
| 3441 | TraceServerFin(session->finCaputre.srvFinSeq, session->srvExpected);
|
---|
| 3442 | }
|
---|
| 3443 | }
|
---|
| 3444 |
|
---|
| 3445 | if (session->flags.finCount >= 2)
|
---|
| 3446 | RemoveSession(session, ipInfo, tcpInfo, 0);
|
---|
| 3447 | }
|
---|
| 3448 |
|
---|
| 3449 |
|
---|
| 3450 | /* If session is in fatal error state free resources now
|
---|
| 3451 | return true if removed, 0 otherwise */
|
---|
| 3452 | static int RemoveFatalSession(IpInfo* ipInfo, TcpInfo* tcpInfo,
|
---|
| 3453 | SnifferSession* session, char* error)
|
---|
| 3454 | {
|
---|
| 3455 | if (session && session->flags.fatalError == FATAL_ERROR_STATE) {
|
---|
| 3456 | RemoveSession(session, ipInfo, tcpInfo, 0);
|
---|
| 3457 | SetError(FATAL_ERROR_STR, error, NULL, 0);
|
---|
| 3458 | return 1;
|
---|
| 3459 | }
|
---|
| 3460 | return 0;
|
---|
| 3461 | }
|
---|
| 3462 |
|
---|
| 3463 |
|
---|
| 3464 | /* Passes in an IP/TCP packet for decoding (ethernet/localhost frame) removed */
|
---|
| 3465 | /* returns Number of bytes on success, 0 for no data yet, and -1 on error */
|
---|
| 3466 | int ssl_DecodePacket(const byte* packet, int length, byte** data, char* error)
|
---|
| 3467 | {
|
---|
| 3468 | TcpInfo tcpInfo;
|
---|
| 3469 | IpInfo ipInfo;
|
---|
| 3470 | const byte* sslFrame;
|
---|
| 3471 | const byte* end = packet + length;
|
---|
| 3472 | int sslBytes; /* ssl bytes unconsumed */
|
---|
| 3473 | int ret;
|
---|
| 3474 | SnifferSession* session = 0;
|
---|
| 3475 |
|
---|
| 3476 | if (CheckHeaders(&ipInfo, &tcpInfo, packet, length, &sslFrame, &sslBytes,
|
---|
| 3477 | error) != 0)
|
---|
| 3478 | return -1;
|
---|
| 3479 |
|
---|
| 3480 | ret = CheckSession(&ipInfo, &tcpInfo, sslBytes, &session, error);
|
---|
| 3481 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1;
|
---|
| 3482 | else if (ret == -1) return -1;
|
---|
| 3483 | else if (ret == 1) return 0; /* done for now */
|
---|
| 3484 |
|
---|
| 3485 | ret = CheckSequence(&ipInfo, &tcpInfo, session, &sslBytes, &sslFrame,error);
|
---|
| 3486 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1;
|
---|
| 3487 | else if (ret == -1) return -1;
|
---|
| 3488 | else if (ret == 1) return 0; /* done for now */
|
---|
| 3489 |
|
---|
| 3490 | ret = CheckPreRecord(&ipInfo, &tcpInfo, &sslFrame, &session, &sslBytes,
|
---|
| 3491 | &end, error);
|
---|
| 3492 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1;
|
---|
| 3493 | else if (ret == -1) return -1;
|
---|
| 3494 | else if (ret == 1) return 0; /* done for now */
|
---|
| 3495 |
|
---|
| 3496 | ret = ProcessMessage(sslFrame, session, sslBytes, data, end, error);
|
---|
| 3497 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1;
|
---|
| 3498 | CheckFinCapture(&ipInfo, &tcpInfo, session);
|
---|
| 3499 | return ret;
|
---|
| 3500 | }
|
---|
| 3501 |
|
---|
| 3502 |
|
---|
| 3503 | /* Deallocator for the decoded data buffer. */
|
---|
| 3504 | /* returns 0 on success, -1 on error */
|
---|
| 3505 | int ssl_FreeDecodeBuffer(byte** data, char* error)
|
---|
| 3506 | {
|
---|
| 3507 | return ssl_FreeZeroDecodeBuffer(data, 0, error);
|
---|
| 3508 | }
|
---|
| 3509 |
|
---|
| 3510 |
|
---|
| 3511 | /* Deallocator for the decoded data buffer, zeros out buffer. */
|
---|
| 3512 | /* returns 0 on success, -1 on error */
|
---|
| 3513 | int ssl_FreeZeroDecodeBuffer(byte** data, int sz, char* error)
|
---|
| 3514 | {
|
---|
| 3515 | (void)error;
|
---|
| 3516 |
|
---|
| 3517 | if (sz < 0) {
|
---|
| 3518 | return -1;
|
---|
| 3519 | }
|
---|
| 3520 |
|
---|
| 3521 | if (data != NULL) {
|
---|
| 3522 | ForceZero(*data, (word32)sz);
|
---|
| 3523 | free(*data);
|
---|
| 3524 | *data = NULL;
|
---|
| 3525 | }
|
---|
| 3526 |
|
---|
| 3527 | return 0;
|
---|
| 3528 | }
|
---|
| 3529 |
|
---|
| 3530 |
|
---|
| 3531 | /* Enables (if traceFile)/ Disables debug tracing */
|
---|
| 3532 | /* returns 0 on success, -1 on error */
|
---|
| 3533 | int ssl_Trace(const char* traceFile, char* error)
|
---|
| 3534 | {
|
---|
| 3535 | if (traceFile) {
|
---|
| 3536 | TraceFile = fopen(traceFile, "a");
|
---|
| 3537 | if (!TraceFile) {
|
---|
| 3538 | SetError(BAD_TRACE_FILE_STR, error, NULL, 0);
|
---|
| 3539 | return -1;
|
---|
| 3540 | }
|
---|
| 3541 | TraceOn = 1;
|
---|
| 3542 | }
|
---|
| 3543 | else
|
---|
| 3544 | TraceOn = 0;
|
---|
| 3545 |
|
---|
| 3546 | return 0;
|
---|
| 3547 | }
|
---|
| 3548 |
|
---|
| 3549 |
|
---|
| 3550 | /* Enables/Disables Recovery of missed data if later packets allow
|
---|
| 3551 | * maxMemory is number of bytes to use for reassembly buffering per session,
|
---|
| 3552 | * -1 means unlimited
|
---|
| 3553 | * returns 0 on success, -1 on error */
|
---|
| 3554 | int ssl_EnableRecovery(int onOff, int maxMemory, char* error)
|
---|
| 3555 | {
|
---|
| 3556 | (void)error;
|
---|
| 3557 |
|
---|
| 3558 | RecoveryEnabled = onOff;
|
---|
| 3559 | if (onOff)
|
---|
| 3560 | MaxRecoveryMemory = maxMemory;
|
---|
| 3561 |
|
---|
| 3562 | return 0;
|
---|
| 3563 | }
|
---|
| 3564 |
|
---|
| 3565 |
|
---|
| 3566 |
|
---|
| 3567 | int ssl_GetSessionStats(unsigned int* active, unsigned int* total,
|
---|
| 3568 | unsigned int* peak, unsigned int* maxSessions,
|
---|
| 3569 | unsigned int* missedData, unsigned int* reassemblyMem,
|
---|
| 3570 | char* error)
|
---|
| 3571 | {
|
---|
| 3572 | int ret;
|
---|
| 3573 |
|
---|
| 3574 | if (missedData) {
|
---|
| 3575 | wc_LockMutex(&RecoveryMutex);
|
---|
| 3576 | *missedData = MissedDataSessions;
|
---|
| 3577 | wc_UnLockMutex(&RecoveryMutex);
|
---|
| 3578 | }
|
---|
| 3579 |
|
---|
| 3580 | if (reassemblyMem) {
|
---|
| 3581 | SnifferSession* session;
|
---|
| 3582 | int i;
|
---|
| 3583 |
|
---|
| 3584 | *reassemblyMem = 0;
|
---|
| 3585 | wc_LockMutex(&SessionMutex);
|
---|
| 3586 | for (i = 0; i < HASH_SIZE; i++) {
|
---|
| 3587 | session = SessionTable[i];
|
---|
| 3588 | while (session) {
|
---|
| 3589 | *reassemblyMem += session->cliReassemblyMemory;
|
---|
| 3590 | *reassemblyMem += session->srvReassemblyMemory;
|
---|
| 3591 | session = session->next;
|
---|
| 3592 | }
|
---|
| 3593 | }
|
---|
| 3594 | wc_UnLockMutex(&SessionMutex);
|
---|
| 3595 | }
|
---|
| 3596 |
|
---|
| 3597 | ret = wolfSSL_get_session_stats(active, total, peak, maxSessions);
|
---|
| 3598 |
|
---|
| 3599 | if (ret == WOLFSSL_SUCCESS)
|
---|
| 3600 | return 0;
|
---|
| 3601 | else {
|
---|
| 3602 | SetError(BAD_SESSION_STATS, error, NULL, 0);
|
---|
| 3603 | return -1;
|
---|
| 3604 | }
|
---|
| 3605 | }
|
---|
| 3606 |
|
---|
| 3607 |
|
---|
| 3608 |
|
---|
| 3609 | #endif /* WOLFSSL_SNIFFER */
|
---|
| 3610 | #endif /* WOLFCRYPT_ONLY */
|
---|