[164] | 1 | /* sniffer.c
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| 2 | *
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| 3 | * Copyright (C) 2006-2015 wolfSSL Inc.
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| 4 | *
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| 5 | * This file is part of wolfSSL. (formerly known as CyaSSL)
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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 02110-1301, USA
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| 20 | */
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| 21 |
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| 22 | #ifdef HAVE_CONFIG_H
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| 23 | #include <config.h>
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| 24 | #endif
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| 25 |
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| 26 | #include <wolfssl/wolfcrypt/settings.h>
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| 27 |
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| 28 | #ifndef WOLFCRYPT_ONLY
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| 29 | #ifdef WOLFSSL_SNIFFER
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| 30 |
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| 31 | #include <assert.h>
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| 32 | #include <time.h>
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| 33 |
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| 34 | #ifndef _WIN32
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| 35 | #include <arpa/inet.h>
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| 36 | #endif
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| 37 |
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| 38 | #ifdef _WIN32
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| 39 | #define SNPRINTF _snprintf
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| 40 | #else
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| 41 | #define SNPRINTF snprintf
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| 42 | #endif
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| 43 |
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| 44 | #include <wolfssl/openssl/ssl.h>
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| 45 | #include <wolfssl/internal.h>
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| 46 | #include <wolfssl/error-ssl.h>
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| 47 | #include <wolfssl/sniffer.h>
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| 48 | #include <wolfssl/sniffer_error.h>
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| 49 | #ifdef NO_INLINE
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| 50 | #include <wolfssl/wolfcrypt/misc.h>
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| 51 | #else
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| 52 | #include <wolfcrypt/src/misc.c>
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| 53 | #endif
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| 54 |
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| 55 |
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| 56 | #ifndef WOLFSSL_HAVE_MIN
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| 57 | #define WOLFSSL_HAVE_MIN
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| 58 |
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| 59 | static INLINE word32 min(word32 a, word32 b)
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| 60 | {
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| 61 | return a > b ? b : a;
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| 62 | }
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| 63 |
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| 64 | #endif /* WOLFSSL_HAVE_MIN */
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| 65 |
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| 66 | #ifndef WOLFSSL_SNIFFER_TIMEOUT
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| 67 | #define WOLFSSL_SNIFFER_TIMEOUT 900
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| 68 | /* Cache unclosed Sessions for 15 minutes since last used */
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| 69 | #endif
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| 70 |
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| 71 | /* Misc constants */
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| 72 | enum {
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| 73 | MAX_SERVER_ADDRESS = 128, /* maximum server address length */
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| 74 | MAX_SERVER_NAME = 128, /* maximum server name length */
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| 75 | MAX_ERROR_LEN = 80, /* maximum error length */
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| 76 | ETHER_IF_ADDR_LEN = 6, /* ethernet interface address length */
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| 77 | LOCAL_IF_ADDR_LEN = 4, /* localhost interface address length, !windows */
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| 78 | TCP_PROTO = 6, /* TCP_PROTOCOL */
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| 79 | IP_HDR_SZ = 20, /* IP header legnth, min */
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| 80 | TCP_HDR_SZ = 20, /* TCP header legnth, min */
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| 81 | IPV4 = 4, /* IP version 4 */
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| 82 | TCP_PROTOCOL = 6, /* TCP Protocol id */
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| 83 | TRACE_MSG_SZ = 80, /* Trace Message buffer size */
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| 84 | HASH_SIZE = 499, /* Session Hash Table Rows */
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| 85 | PSEUDO_HDR_SZ = 12, /* TCP Pseudo Header size in bytes */
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| 86 | FATAL_ERROR_STATE = 1, /* SnifferSession fatal error state */
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| 87 | TICKET_HINT_LEN = 4, /* Session Ticket Hint length */
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| 88 | EXT_TYPE_SZ = 2, /* Extension length */
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| 89 | MAX_INPUT_SZ = MAX_RECORD_SIZE + COMP_EXTRA + MAX_MSG_EXTRA +
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| 90 | MTU_EXTRA, /* Max input sz of reassembly */
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| 91 | TICKET_EXT_ID = 0x23 /* Session Ticket Extension ID */
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| 92 | };
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| 93 |
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| 94 |
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| 95 | #ifdef _WIN32
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| 96 |
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| 97 | static HMODULE dllModule; /* for error string resources */
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| 98 |
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| 99 | BOOL APIENTRY DllMain( HMODULE hModule,
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| 100 | DWORD ul_reason_for_call,
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| 101 | LPVOID lpReserved
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| 102 | )
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| 103 | {
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| 104 | static int didInit = 0;
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| 105 |
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| 106 | switch (ul_reason_for_call)
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| 107 | {
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| 108 | case DLL_PROCESS_ATTACH:
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| 109 | if (didInit == 0) {
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| 110 | dllModule = hModule;
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| 111 | ssl_InitSniffer();
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| 112 | didInit = 1;
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| 113 | }
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| 114 | break;
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| 115 | case DLL_THREAD_ATTACH:
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| 116 | break;
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| 117 | case DLL_THREAD_DETACH:
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| 118 | break;
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| 119 | case DLL_PROCESS_DETACH:
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| 120 | if (didInit) {
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| 121 | ssl_FreeSniffer();
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| 122 | didInit = 0;
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| 123 | }
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| 124 | break;
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| 125 | }
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| 126 | return TRUE;
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| 127 | }
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| 128 |
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| 129 | #endif /* _WIN32 */
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| 130 |
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| 131 |
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| 132 | static int TraceOn = 0; /* Trace is off by default */
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| 133 | static FILE* TraceFile = 0;
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| 134 |
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| 135 |
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| 136 | /* windows uses .rc table for this */
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| 137 | #ifndef _WIN32
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| 138 |
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| 139 | static const char* const msgTable[] =
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| 140 | {
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| 141 | /* 1 */
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| 142 | "Out of Memory",
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| 143 | "New SSL Sniffer Server Registered",
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| 144 | "Checking IP Header",
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| 145 | "SSL Sniffer Server Not Registered",
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| 146 | "Checking TCP Header",
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| 147 |
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| 148 | /* 6 */
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| 149 | "SSL Sniffer Server Port Not Registered",
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| 150 | "RSA Private Decrypt Error",
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| 151 | "RSA Private Decode Error",
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| 152 | "Set Cipher Spec Error",
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| 153 | "Server Hello Input Malformed",
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| 154 |
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| 155 | /* 11 */
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| 156 | "Couldn't Resume Session Error",
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| 157 | "Server Did Resumption",
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| 158 | "Client Hello Input Malformed",
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| 159 | "Client Trying to Resume",
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| 160 | "Handshake Input Malformed",
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| 161 |
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| 162 | /* 16 */
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| 163 | "Got Hello Verify msg",
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| 164 | "Got Server Hello msg",
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| 165 | "Got Cert Request msg",
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| 166 | "Got Server Key Exchange msg",
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| 167 | "Got Cert msg",
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| 168 |
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| 169 | /* 21 */
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| 170 | "Got Server Hello Done msg",
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| 171 | "Got Finished msg",
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| 172 | "Got Client Hello msg",
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| 173 | "Got Client Key Exchange msg",
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| 174 | "Got Cert Verify msg",
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| 175 |
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| 176 | /* 26 */
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| 177 | "Got Unknown Handshake msg",
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| 178 | "New SSL Sniffer Session created",
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| 179 | "Couldn't create new SSL",
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| 180 | "Got a Packet to decode",
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| 181 | "No data present",
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| 182 |
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| 183 | /* 31 */
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| 184 | "Session Not Found",
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| 185 | "Got an Old Client Hello msg",
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| 186 | "Old Client Hello Input Malformed",
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| 187 | "Old Client Hello OK",
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| 188 | "Bad Old Client Hello",
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| 189 |
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| 190 | /* 36 */
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| 191 | "Bad Record Header",
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| 192 | "Record Header Input Malformed",
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| 193 | "Got a HandShake msg",
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| 194 | "Bad HandShake msg",
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| 195 | "Got a Change Cipher Spec msg",
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| 196 |
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| 197 | /* 41 */
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| 198 | "Got Application Data msg",
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| 199 | "Bad Application Data",
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| 200 | "Got an Alert msg",
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| 201 | "Another msg to Process",
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| 202 | "Removing Session From Table",
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| 203 |
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| 204 | /* 46 */
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| 205 | "Bad Key File",
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| 206 | "Wrong IP Version",
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| 207 | "Wrong Protocol type",
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| 208 | "Packet Short for header processing",
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| 209 | "Got Unknown Record Type",
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| 210 |
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| 211 | /* 51 */
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| 212 | "Can't Open Trace File",
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| 213 | "Session in Fatal Error State",
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| 214 | "Partial SSL record received",
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| 215 | "Buffer Error, malformed input",
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| 216 | "Added to Partial Input",
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| 217 |
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| 218 | /* 56 */
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| 219 | "Received a Duplicate Packet",
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| 220 | "Received an Out of Order Packet",
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| 221 | "Received an Overlap Duplicate Packet",
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| 222 | "Received an Overlap Reassembly Begin Duplicate Packet",
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| 223 | "Received an Overlap Reassembly End Duplicate Packet",
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| 224 |
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| 225 | /* 61 */
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| 226 | "Missed the Client Hello Entirely",
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| 227 | "Got Hello Request msg",
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| 228 | "Got Session Ticket msg",
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| 229 | "Bad Input",
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| 230 | "Bad Decrypt Type",
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| 231 |
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| 232 | /* 66 */
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| 233 | "Bad Finished Message Processing",
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| 234 | "Bad Compression Type",
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| 235 | "Bad DeriveKeys Error",
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| 236 | "Saw ACK for Missing Packet Error",
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| 237 | "Bad Decrypt Operation",
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| 238 |
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| 239 | /* 71 */
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| 240 | "Decrypt Keys Not Set Up",
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| 241 | "Late Key Load Error",
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| 242 | "Got Certificate Status msg",
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| 243 | "RSA Key Missing Error",
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| 244 | "Secure Renegotiation Not Supported",
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| 245 |
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| 246 | /* 76 */
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| 247 | "Get Session Stats Failure",
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| 248 | "Reassembly Buffer Size Exceeded",
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| 249 | "Dropping Lost Fragment",
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| 250 | "Dropping Partial Record",
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| 251 | "Clear ACK Fault",
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| 252 |
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| 253 | /* 81 */
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| 254 | "Bad Decrypt Size"
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| 255 | };
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| 256 |
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| 257 |
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| 258 | /* *nix version uses table above */
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| 259 | static void GetError(int idx, char* str)
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| 260 | {
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| 261 | XSTRNCPY(str, msgTable[idx - 1], MAX_ERROR_LEN);
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| 262 | }
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| 263 |
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| 264 |
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| 265 | #else /* _WIN32 */
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| 266 |
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| 267 |
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| 268 | /* Windows version uses .rc table */
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| 269 | static void GetError(int idx, char* buffer)
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| 270 | {
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| 271 | if (!LoadStringA(dllModule, idx, buffer, MAX_ERROR_LEN))
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| 272 | buffer[0] = 0;
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| 273 | }
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| 274 |
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| 275 |
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| 276 | #endif /* _WIN32 */
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| 277 |
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| 278 |
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| 279 | /* Packet Buffer for reassembly list and ready list */
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| 280 | typedef struct PacketBuffer {
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| 281 | word32 begin; /* relative sequence begin */
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| 282 | word32 end; /* relative sequence end */
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| 283 | byte* data; /* actual data */
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| 284 | struct PacketBuffer* next; /* next on reassembly list or ready list */
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| 285 | } PacketBuffer;
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| 286 |
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| 287 |
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| 288 | #ifdef HAVE_SNI
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| 289 |
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| 290 | /* NamedKey maps a SNI name to a specific private key */
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| 291 | typedef struct NamedKey {
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| 292 | char name[MAX_SERVER_NAME]; /* server DNS name */
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| 293 | word32 nameSz; /* size of server DNS name */
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| 294 | byte* key; /* DER private key */
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| 295 | word32 keySz; /* size of DER private key */
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| 296 | struct NamedKey* next; /* for list */
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| 297 | } NamedKey;
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| 298 |
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| 299 | #endif
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| 300 |
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| 301 |
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| 302 | /* Sniffer Server holds info for each server/port monitored */
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| 303 | typedef struct SnifferServer {
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| 304 | SSL_CTX* ctx; /* SSL context */
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| 305 | char address[MAX_SERVER_ADDRESS]; /* passed in server address */
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| 306 | word32 server; /* netowrk order address */
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| 307 | int port; /* server port */
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| 308 | #ifdef HAVE_SNI
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| 309 | NamedKey* namedKeys; /* mapping of names and keys */
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| 310 | wolfSSL_Mutex namedKeysMutex; /* mutex for namedKey list */
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| 311 | #endif
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| 312 | struct SnifferServer* next; /* for list */
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| 313 | } SnifferServer;
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| 314 |
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| 315 |
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| 316 | /* Session Flags */
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| 317 | typedef struct Flags {
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| 318 | byte side; /* which end is current packet headed */
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| 319 | byte serverCipherOn; /* indicates whether cipher is active */
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| 320 | byte clientCipherOn; /* indicates whether cipher is active */
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| 321 | byte resuming; /* did this session come from resumption */
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| 322 | byte cached; /* have we cached this session yet */
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| 323 | byte clientHello; /* processed client hello yet, for SSLv2 */
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| 324 | byte finCount; /* get both FINs before removing */
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| 325 | byte fatalError; /* fatal error state */
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| 326 | byte cliAckFault; /* client acked unseen data from server */
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| 327 | byte srvAckFault; /* server acked unseen data from client */
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| 328 | byte cliSkipPartial; /* client skips partial data to catch up */
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| 329 | byte srvSkipPartial; /* server skips partial data to catch up */
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| 330 | } Flags;
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| 331 |
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| 332 |
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| 333 | /* Out of Order FIN caputre */
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| 334 | typedef struct FinCaputre {
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| 335 | word32 cliFinSeq; /* client relative sequence FIN 0 is no */
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| 336 | word32 srvFinSeq; /* server relative sequence FIN, 0 is no */
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| 337 | byte cliCounted; /* did we count yet, detects duplicates */
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| 338 | byte srvCounted; /* did we count yet, detects duplicates */
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| 339 | } FinCaputre;
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| 340 |
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| 341 |
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| 342 | /* Sniffer Session holds info for each client/server SSL/TLS session */
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| 343 | typedef struct SnifferSession {
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| 344 | SnifferServer* context; /* server context */
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| 345 | SSL* sslServer; /* SSL server side decode */
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| 346 | SSL* sslClient; /* SSL client side decode */
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| 347 | word32 server; /* server address in network byte order */
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| 348 | word32 client; /* client address in network byte order */
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| 349 | word16 srvPort; /* server port */
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| 350 | word16 cliPort; /* client port */
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| 351 | word32 cliSeqStart; /* client start sequence */
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| 352 | word32 srvSeqStart; /* server start sequence */
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| 353 | word32 cliExpected; /* client expected sequence (relative) */
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| 354 | word32 srvExpected; /* server expected sequence (relative) */
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| 355 | FinCaputre finCaputre; /* retain out of order FIN s */
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| 356 | Flags flags; /* session flags */
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| 357 | time_t lastUsed; /* last used ticks */
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| 358 | PacketBuffer* cliReassemblyList; /* client out of order packets */
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| 359 | PacketBuffer* srvReassemblyList; /* server out of order packets */
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| 360 | word32 cliReassemblyMemory; /* client packet memory used */
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| 361 | word32 srvReassemblyMemory; /* server packet memory used */
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| 362 | struct SnifferSession* next; /* for hash table list */
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| 363 | byte* ticketID; /* mac ID of session ticket */
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| 364 | } SnifferSession;
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| 365 |
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| 366 |
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| 367 | /* Sniffer Server List and mutex */
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| 368 | static SnifferServer* ServerList = 0;
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| 369 | static wolfSSL_Mutex ServerListMutex;
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| 370 |
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| 371 |
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| 372 | /* Session Hash Table, mutex, and count */
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| 373 | static SnifferSession* SessionTable[HASH_SIZE];
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| 374 | static wolfSSL_Mutex SessionMutex;
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| 375 | static int SessionCount = 0;
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| 376 |
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| 377 | /* Recovery of missed data switches and stats */
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| 378 | static wolfSSL_Mutex RecoveryMutex; /* for stats */
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| 379 | static int RecoveryEnabled = 0; /* global switch */
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| 380 | static int MaxRecoveryMemory = -1; /* per session max recovery memory */
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| 381 | static word32 MissedDataSessions = 0; /* # of sessions with missed data */
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| 382 |
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| 383 |
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| 384 | static void UpdateMissedDataSessions(void)
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| 385 | {
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| 386 | LockMutex(&RecoveryMutex);
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| 387 | MissedDataSessions += 1;
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| 388 | UnLockMutex(&RecoveryMutex);
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| 389 | }
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| 390 |
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| 391 |
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| 392 | /* Initialize overall Sniffer */
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| 393 | void ssl_InitSniffer(void)
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| 394 | {
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| 395 | wolfSSL_Init();
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| 396 | InitMutex(&ServerListMutex);
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| 397 | InitMutex(&SessionMutex);
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| 398 | InitMutex(&RecoveryMutex);
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| 399 | }
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| 400 |
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| 401 |
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| 402 | #ifdef HAVE_SNI
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| 403 |
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| 404 | /* Free Named Key and the zero out the private key it holds */
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| 405 | static void FreeNamedKey(NamedKey* in)
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| 406 | {
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| 407 | if (in) {
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| 408 | if (in->key) {
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| 409 | ForceZero(in->key, in->keySz);
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| 410 | free(in->key);
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| 411 | }
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| 412 | free(in);
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| 413 | }
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| 414 | }
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| 415 |
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| 416 |
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| 417 | static void FreeNamedKeyList(NamedKey* in)
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| 418 | {
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| 419 | NamedKey* next;
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| 420 |
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| 421 | while (in) {
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| 422 | next = in->next;
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| 423 | FreeNamedKey(in);
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| 424 | in = next;
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| 425 | }
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| 426 | }
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| 427 |
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| 428 | #endif
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| 429 |
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| 430 |
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| 431 | /* Free Sniffer Server's resources/self */
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| 432 | static void FreeSnifferServer(SnifferServer* srv)
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| 433 | {
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| 434 | if (srv) {
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| 435 | #ifdef HAVE_SNI
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| 436 | LockMutex(&srv->namedKeysMutex);
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| 437 | FreeNamedKeyList(srv->namedKeys);
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| 438 | UnLockMutex(&srv->namedKeysMutex);
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| 439 | FreeMutex(&srv->namedKeysMutex);
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| 440 | #endif
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| 441 | SSL_CTX_free(srv->ctx);
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| 442 | }
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| 443 | free(srv);
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| 444 | }
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| 445 |
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| 446 |
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| 447 | /* free PacketBuffer's resources/self */
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| 448 | static void FreePacketBuffer(PacketBuffer* del)
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| 449 | {
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| 450 | if (del) {
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| 451 | free(del->data);
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| 452 | free(del);
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| 453 | }
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| 454 | }
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| 455 |
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| 456 |
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| 457 | /* remove PacketBuffer List */
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| 458 | static void FreePacketList(PacketBuffer* in)
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| 459 | {
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| 460 | if (in) {
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| 461 | PacketBuffer* del;
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| 462 | PacketBuffer* packet = in;
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| 463 |
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| 464 | while (packet) {
|
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| 465 | del = packet;
|
---|
| 466 | packet = packet->next;
|
---|
| 467 | FreePacketBuffer(del);
|
---|
| 468 | }
|
---|
| 469 | }
|
---|
| 470 | }
|
---|
| 471 |
|
---|
| 472 |
|
---|
| 473 | /* Free Sniffer Session's resources/self */
|
---|
| 474 | static void FreeSnifferSession(SnifferSession* session)
|
---|
| 475 | {
|
---|
| 476 | if (session) {
|
---|
| 477 | SSL_free(session->sslClient);
|
---|
| 478 | SSL_free(session->sslServer);
|
---|
| 479 |
|
---|
| 480 | FreePacketList(session->cliReassemblyList);
|
---|
| 481 | FreePacketList(session->srvReassemblyList);
|
---|
| 482 |
|
---|
| 483 | free(session->ticketID);
|
---|
| 484 | }
|
---|
| 485 | free(session);
|
---|
| 486 | }
|
---|
| 487 |
|
---|
| 488 |
|
---|
| 489 | /* Free overall Sniffer */
|
---|
| 490 | void ssl_FreeSniffer(void)
|
---|
| 491 | {
|
---|
| 492 | SnifferServer* srv;
|
---|
| 493 | SnifferServer* removeServer;
|
---|
| 494 | SnifferSession* session;
|
---|
| 495 | SnifferSession* removeSession;
|
---|
| 496 | int i;
|
---|
| 497 |
|
---|
| 498 | LockMutex(&ServerListMutex);
|
---|
| 499 | LockMutex(&SessionMutex);
|
---|
| 500 |
|
---|
| 501 | srv = ServerList;
|
---|
| 502 | while (srv) {
|
---|
| 503 | removeServer = srv;
|
---|
| 504 | srv = srv->next;
|
---|
| 505 | FreeSnifferServer(removeServer);
|
---|
| 506 | }
|
---|
| 507 |
|
---|
| 508 | for (i = 0; i < HASH_SIZE; i++) {
|
---|
| 509 | session = SessionTable[i];
|
---|
| 510 | while (session) {
|
---|
| 511 | removeSession = session;
|
---|
| 512 | session = session->next;
|
---|
| 513 | FreeSnifferSession(removeSession);
|
---|
| 514 | }
|
---|
| 515 | }
|
---|
| 516 |
|
---|
| 517 | UnLockMutex(&SessionMutex);
|
---|
| 518 | UnLockMutex(&ServerListMutex);
|
---|
| 519 |
|
---|
| 520 | FreeMutex(&RecoveryMutex);
|
---|
| 521 | FreeMutex(&SessionMutex);
|
---|
| 522 | FreeMutex(&ServerListMutex);
|
---|
| 523 |
|
---|
| 524 | if (TraceFile) {
|
---|
| 525 | TraceOn = 0;
|
---|
| 526 | fclose(TraceFile);
|
---|
| 527 | TraceFile = NULL;
|
---|
| 528 | }
|
---|
| 529 |
|
---|
| 530 | wolfSSL_Cleanup();
|
---|
| 531 | }
|
---|
| 532 |
|
---|
| 533 |
|
---|
| 534 | /* Initialize a SnifferServer */
|
---|
| 535 | static void InitSnifferServer(SnifferServer* sniffer)
|
---|
| 536 | {
|
---|
| 537 | sniffer->ctx = 0;
|
---|
| 538 | XMEMSET(sniffer->address, 0, MAX_SERVER_ADDRESS);
|
---|
| 539 | sniffer->server = 0;
|
---|
| 540 | sniffer->port = 0;
|
---|
| 541 | #ifdef HAVE_SNI
|
---|
| 542 | sniffer->namedKeys = 0;
|
---|
| 543 | InitMutex(&sniffer->namedKeysMutex);
|
---|
| 544 | #endif
|
---|
| 545 | sniffer->next = 0;
|
---|
| 546 | }
|
---|
| 547 |
|
---|
| 548 |
|
---|
| 549 | /* Initialize session flags */
|
---|
| 550 | static void InitFlags(Flags* flags)
|
---|
| 551 | {
|
---|
| 552 | flags->side = 0;
|
---|
| 553 | flags->serverCipherOn = 0;
|
---|
| 554 | flags->clientCipherOn = 0;
|
---|
| 555 | flags->resuming = 0;
|
---|
| 556 | flags->cached = 0;
|
---|
| 557 | flags->clientHello = 0;
|
---|
| 558 | flags->finCount = 0;
|
---|
| 559 | flags->fatalError = 0;
|
---|
| 560 | flags->cliAckFault = 0;
|
---|
| 561 | flags->srvAckFault = 0;
|
---|
| 562 | flags->cliSkipPartial = 0;
|
---|
| 563 | flags->srvSkipPartial = 0;
|
---|
| 564 | }
|
---|
| 565 |
|
---|
| 566 |
|
---|
| 567 | /* Initialize FIN Capture */
|
---|
| 568 | static void InitFinCapture(FinCaputre* cap)
|
---|
| 569 | {
|
---|
| 570 | cap->cliFinSeq = 0;
|
---|
| 571 | cap->srvFinSeq = 0;
|
---|
| 572 | cap->cliCounted = 0;
|
---|
| 573 | cap->srvCounted = 0;
|
---|
| 574 | }
|
---|
| 575 |
|
---|
| 576 |
|
---|
| 577 | /* Initialize a Sniffer Session */
|
---|
| 578 | static void InitSession(SnifferSession* session)
|
---|
| 579 | {
|
---|
| 580 | session->context = 0;
|
---|
| 581 | session->sslServer = 0;
|
---|
| 582 | session->sslClient = 0;
|
---|
| 583 | session->server = 0;
|
---|
| 584 | session->client = 0;
|
---|
| 585 | session->srvPort = 0;
|
---|
| 586 | session->cliPort = 0;
|
---|
| 587 | session->cliSeqStart = 0;
|
---|
| 588 | session->srvSeqStart = 0;
|
---|
| 589 | session->cliExpected = 0;
|
---|
| 590 | session->srvExpected = 0;
|
---|
| 591 | session->lastUsed = 0;
|
---|
| 592 | session->cliReassemblyList = 0;
|
---|
| 593 | session->srvReassemblyList = 0;
|
---|
| 594 | session->cliReassemblyMemory = 0;
|
---|
| 595 | session->srvReassemblyMemory = 0;
|
---|
| 596 | session->next = 0;
|
---|
| 597 | session->ticketID = 0;
|
---|
| 598 |
|
---|
| 599 | InitFlags(&session->flags);
|
---|
| 600 | InitFinCapture(&session->finCaputre);
|
---|
| 601 | }
|
---|
| 602 |
|
---|
| 603 |
|
---|
| 604 | /* IP Info from IP Header */
|
---|
| 605 | typedef struct IpInfo {
|
---|
| 606 | int length; /* length of this header */
|
---|
| 607 | int total; /* total length of fragment */
|
---|
| 608 | word32 src; /* network order source address */
|
---|
| 609 | word32 dst; /* network order destination address */
|
---|
| 610 | } IpInfo;
|
---|
| 611 |
|
---|
| 612 |
|
---|
| 613 | /* TCP Info from TCP Header */
|
---|
| 614 | typedef struct TcpInfo {
|
---|
| 615 | int srcPort; /* source port */
|
---|
| 616 | int dstPort; /* source port */
|
---|
| 617 | int length; /* length of this header */
|
---|
| 618 | word32 sequence; /* sequence number */
|
---|
| 619 | word32 ackNumber; /* ack number */
|
---|
| 620 | byte fin; /* FIN set */
|
---|
| 621 | byte rst; /* RST set */
|
---|
| 622 | byte syn; /* SYN set */
|
---|
| 623 | byte ack; /* ACK set */
|
---|
| 624 | } TcpInfo;
|
---|
| 625 |
|
---|
| 626 |
|
---|
| 627 | /* Tcp Pseudo Header for Checksum calculation */
|
---|
| 628 | typedef struct TcpPseudoHdr {
|
---|
| 629 | word32 src; /* source address */
|
---|
| 630 | word32 dst; /* destination address */
|
---|
| 631 | byte rsv; /* reserved, always 0 */
|
---|
| 632 | byte protocol; /* IP protocol */
|
---|
| 633 | word16 legnth; /* tcp header length + data length (doesn't include */
|
---|
| 634 | /* pseudo header length) network order */
|
---|
| 635 | } TcpPseudoHdr;
|
---|
| 636 |
|
---|
| 637 |
|
---|
| 638 | /* Password Setting Callback */
|
---|
| 639 | static int SetPassword(char* passwd, int sz, int rw, void* userdata)
|
---|
| 640 | {
|
---|
| 641 | (void)rw;
|
---|
| 642 | XSTRNCPY(passwd, (const char*)userdata, sz);
|
---|
| 643 | return (int)XSTRLEN((const char*)userdata);
|
---|
| 644 | }
|
---|
| 645 |
|
---|
| 646 |
|
---|
| 647 | /* Ethernet Header */
|
---|
| 648 | typedef struct EthernetHdr {
|
---|
| 649 | byte dst[ETHER_IF_ADDR_LEN]; /* destination host address */
|
---|
| 650 | byte src[ETHER_IF_ADDR_LEN]; /* source host address */
|
---|
| 651 | word16 type; /* IP, ARP, etc */
|
---|
| 652 | } EthernetHdr;
|
---|
| 653 |
|
---|
| 654 |
|
---|
| 655 | /* IP Header */
|
---|
| 656 | typedef struct IpHdr {
|
---|
| 657 | byte ver_hl; /* version/header length */
|
---|
| 658 | byte tos; /* type of service */
|
---|
| 659 | word16 length; /* total length */
|
---|
| 660 | word16 id; /* identification */
|
---|
| 661 | word16 offset; /* fragment offset field */
|
---|
| 662 | byte ttl; /* time to live */
|
---|
| 663 | byte protocol; /* protocol */
|
---|
| 664 | word16 sum; /* checksum */
|
---|
| 665 | word32 src; /* source address */
|
---|
| 666 | word32 dst; /* destination address */
|
---|
| 667 | } IpHdr;
|
---|
| 668 |
|
---|
| 669 |
|
---|
| 670 | #define IP_HL(ip) ( (((ip)->ver_hl) & 0x0f) * 4)
|
---|
| 671 | #define IP_V(ip) ( ((ip)->ver_hl) >> 4)
|
---|
| 672 |
|
---|
| 673 | /* TCP Header */
|
---|
| 674 | typedef struct TcpHdr {
|
---|
| 675 | word16 srcPort; /* source port */
|
---|
| 676 | word16 dstPort; /* destination port */
|
---|
| 677 | word32 sequence; /* sequence number */
|
---|
| 678 | word32 ack; /* acknoledgment number */
|
---|
| 679 | byte offset; /* data offset, reserved */
|
---|
| 680 | byte flags; /* option flags */
|
---|
| 681 | word16 window; /* window */
|
---|
| 682 | word16 sum; /* checksum */
|
---|
| 683 | word16 urgent; /* urgent pointer */
|
---|
| 684 | } TcpHdr;
|
---|
| 685 |
|
---|
| 686 | #define TCP_LEN(tcp) ( (((tcp)->offset & 0xf0) >> 4) * 4)
|
---|
| 687 | #define TCP_FIN 0x01
|
---|
| 688 | #define TCP_SYN 0x02
|
---|
| 689 | #define TCP_RST 0x04
|
---|
| 690 | #define TCP_ACK 0x10
|
---|
| 691 |
|
---|
| 692 |
|
---|
| 693 |
|
---|
| 694 |
|
---|
| 695 |
|
---|
| 696 | /* Use platform specific GetError to write to tracfile if tracing */
|
---|
| 697 | static void Trace(int idx)
|
---|
| 698 | {
|
---|
| 699 | if (TraceOn) {
|
---|
| 700 | char myBuffer[MAX_ERROR_LEN];
|
---|
| 701 | GetError(idx, myBuffer);
|
---|
| 702 | fprintf(TraceFile, "\t%s\n", myBuffer);
|
---|
| 703 | #ifdef DEBUG_SNIFFER
|
---|
| 704 | fprintf(stderr, "\t%s\n", myBuffer);
|
---|
| 705 | #endif
|
---|
| 706 | }
|
---|
| 707 | }
|
---|
| 708 |
|
---|
| 709 |
|
---|
| 710 | /* Show TimeStamp for beginning of packet Trace */
|
---|
| 711 | static void TraceHeader(void)
|
---|
| 712 | {
|
---|
| 713 | if (TraceOn) {
|
---|
| 714 | time_t ticks = time(NULL);
|
---|
| 715 | fprintf(TraceFile, "\n%s", ctime(&ticks));
|
---|
| 716 | }
|
---|
| 717 | }
|
---|
| 718 |
|
---|
| 719 |
|
---|
| 720 | /* Show Set Server info for Trace */
|
---|
| 721 | static void TraceSetServer(const char* srv, int port, const char* keyFile)
|
---|
| 722 | {
|
---|
| 723 | if (TraceOn) {
|
---|
| 724 | fprintf(TraceFile, "\tTrying to install a new Sniffer Server with\n");
|
---|
| 725 | fprintf(TraceFile, "\tserver: %s, port: %d, keyFile: %s\n", srv, port,
|
---|
| 726 | keyFile);
|
---|
| 727 | }
|
---|
| 728 | }
|
---|
| 729 |
|
---|
| 730 |
|
---|
| 731 | #ifdef HAVE_SNI
|
---|
| 732 |
|
---|
| 733 | /* Show Set Named Server info for Trace */
|
---|
| 734 | static void TraceSetNamedServer(const char* name,
|
---|
| 735 | const char* srv, int port, const char* keyFile)
|
---|
| 736 | {
|
---|
| 737 | if (TraceOn) {
|
---|
| 738 | fprintf(TraceFile, "\tTrying to install a new Sniffer Server with\n");
|
---|
| 739 | fprintf(TraceFile, "\tname: %s, server: %s, port: %d, keyFile: %s\n",
|
---|
| 740 | name, srv, port, keyFile);
|
---|
| 741 | }
|
---|
| 742 | }
|
---|
| 743 |
|
---|
| 744 | #endif
|
---|
| 745 |
|
---|
| 746 |
|
---|
| 747 | /* Trace got packet number */
|
---|
| 748 | static void TracePacket(void)
|
---|
| 749 | {
|
---|
| 750 | if (TraceOn) {
|
---|
| 751 | static word32 packetNumber = 0;
|
---|
| 752 | fprintf(TraceFile, "\tGot a Packet to decode, packet %u\n",
|
---|
| 753 | ++packetNumber);
|
---|
| 754 | }
|
---|
| 755 | }
|
---|
| 756 |
|
---|
| 757 |
|
---|
| 758 | /* Convert network byte order address into human readable */
|
---|
| 759 | static char* IpToS(word32 addr, char* str)
|
---|
| 760 | {
|
---|
| 761 | byte* p = (byte*)&addr;
|
---|
| 762 |
|
---|
| 763 | SNPRINTF(str, TRACE_MSG_SZ, "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
|
---|
| 764 |
|
---|
| 765 | return str;
|
---|
| 766 | }
|
---|
| 767 |
|
---|
| 768 |
|
---|
| 769 | /* Show destination and source address from Ip Hdr for packet Trace */
|
---|
| 770 | static void TraceIP(IpHdr* iphdr)
|
---|
| 771 | {
|
---|
| 772 | if (TraceOn) {
|
---|
| 773 | char src[TRACE_MSG_SZ];
|
---|
| 774 | char dst[TRACE_MSG_SZ];
|
---|
| 775 | fprintf(TraceFile, "\tdst:%s src:%s\n", IpToS(iphdr->dst, dst),
|
---|
| 776 | IpToS(iphdr->src, src));
|
---|
| 777 | }
|
---|
| 778 | }
|
---|
| 779 |
|
---|
| 780 |
|
---|
| 781 | /* Show destination and source port from Tcp Hdr for packet Trace */
|
---|
| 782 | static void TraceTcp(TcpHdr* tcphdr)
|
---|
| 783 | {
|
---|
| 784 | if (TraceOn) {
|
---|
| 785 | fprintf(TraceFile, "\tdstPort:%u srcPort:%u\n", ntohs(tcphdr->dstPort),
|
---|
| 786 | ntohs(tcphdr->srcPort));
|
---|
| 787 | }
|
---|
| 788 | }
|
---|
| 789 |
|
---|
| 790 |
|
---|
| 791 | /* Show sequence and payload length for Trace */
|
---|
| 792 | static void TraceSequence(word32 seq, int len)
|
---|
| 793 | {
|
---|
| 794 | if (TraceOn) {
|
---|
| 795 | fprintf(TraceFile, "\tSequence:%u, payload length:%d\n", seq, len);
|
---|
| 796 | }
|
---|
| 797 | }
|
---|
| 798 |
|
---|
| 799 |
|
---|
| 800 | /* Show sequence and payload length for Trace */
|
---|
| 801 | static void TraceAck(word32 ack, word32 expected)
|
---|
| 802 | {
|
---|
| 803 | if (TraceOn) {
|
---|
| 804 | fprintf(TraceFile, "\tAck:%u Expected:%u\n", ack, expected);
|
---|
| 805 | }
|
---|
| 806 | }
|
---|
| 807 |
|
---|
| 808 |
|
---|
| 809 | /* Show relative expected and relative received sequences */
|
---|
| 810 | static void TraceRelativeSequence(word32 expected, word32 got)
|
---|
| 811 | {
|
---|
| 812 | if (TraceOn) {
|
---|
| 813 | fprintf(TraceFile, "\tExpected sequence:%u, received sequence:%u\n",
|
---|
| 814 | expected, got);
|
---|
| 815 | }
|
---|
| 816 | }
|
---|
| 817 |
|
---|
| 818 |
|
---|
| 819 | /* Show server sequence startup from SYN */
|
---|
| 820 | static void TraceServerSyn(word32 seq)
|
---|
| 821 | {
|
---|
| 822 | if (TraceOn) {
|
---|
| 823 | fprintf(TraceFile, "\tServer SYN, Sequence Start:%u\n", seq);
|
---|
| 824 | }
|
---|
| 825 | }
|
---|
| 826 |
|
---|
| 827 |
|
---|
| 828 | /* Show client sequence startup from SYN */
|
---|
| 829 | static void TraceClientSyn(word32 seq)
|
---|
| 830 | {
|
---|
| 831 | if (TraceOn) {
|
---|
| 832 | fprintf(TraceFile, "\tClient SYN, Sequence Start:%u\n", seq);
|
---|
| 833 | }
|
---|
| 834 | }
|
---|
| 835 |
|
---|
| 836 |
|
---|
| 837 | /* Show client FIN capture */
|
---|
| 838 | static void TraceClientFin(word32 finSeq, word32 relSeq)
|
---|
| 839 | {
|
---|
| 840 | if (TraceOn) {
|
---|
| 841 | fprintf(TraceFile, "\tClient FIN capture:%u, current SEQ:%u\n",
|
---|
| 842 | finSeq, relSeq);
|
---|
| 843 | }
|
---|
| 844 | }
|
---|
| 845 |
|
---|
| 846 |
|
---|
| 847 | /* Show server FIN capture */
|
---|
| 848 | static void TraceServerFin(word32 finSeq, word32 relSeq)
|
---|
| 849 | {
|
---|
| 850 | if (TraceOn) {
|
---|
| 851 | fprintf(TraceFile, "\tServer FIN capture:%u, current SEQ:%u\n",
|
---|
| 852 | finSeq, relSeq);
|
---|
| 853 | }
|
---|
| 854 | }
|
---|
| 855 |
|
---|
| 856 |
|
---|
| 857 | /* Show number of SSL data bytes decoded, could be 0 (ok) */
|
---|
| 858 | static void TraceGotData(int bytes)
|
---|
| 859 | {
|
---|
| 860 | if (TraceOn) {
|
---|
| 861 | fprintf(TraceFile, "\t%d bytes of SSL App data processed\n", bytes);
|
---|
| 862 | }
|
---|
| 863 | }
|
---|
| 864 |
|
---|
| 865 |
|
---|
| 866 | /* Show bytes added to old SSL App data */
|
---|
| 867 | static void TraceAddedData(int newBytes, int existingBytes)
|
---|
| 868 | {
|
---|
| 869 | if (TraceOn) {
|
---|
| 870 | fprintf(TraceFile,
|
---|
| 871 | "\t%d bytes added to %d exisiting bytes in User Buffer\n",
|
---|
| 872 | newBytes, existingBytes);
|
---|
| 873 | }
|
---|
| 874 | }
|
---|
| 875 |
|
---|
| 876 |
|
---|
| 877 | /* Show Stale Session */
|
---|
| 878 | static void TraceStaleSession(void)
|
---|
| 879 | {
|
---|
| 880 | if (TraceOn) {
|
---|
| 881 | fprintf(TraceFile, "\tFound a stale session\n");
|
---|
| 882 | }
|
---|
| 883 | }
|
---|
| 884 |
|
---|
| 885 |
|
---|
| 886 | /* Show Finding Stale Sessions */
|
---|
| 887 | static void TraceFindingStale(void)
|
---|
| 888 | {
|
---|
| 889 | if (TraceOn) {
|
---|
| 890 | fprintf(TraceFile, "\tTrying to find Stale Sessions\n");
|
---|
| 891 | }
|
---|
| 892 | }
|
---|
| 893 |
|
---|
| 894 |
|
---|
| 895 | /* Show Removed Session */
|
---|
| 896 | static void TraceRemovedSession(void)
|
---|
| 897 | {
|
---|
| 898 | if (TraceOn) {
|
---|
| 899 | fprintf(TraceFile, "\tRemoved it\n");
|
---|
| 900 | }
|
---|
| 901 | }
|
---|
| 902 |
|
---|
| 903 |
|
---|
| 904 | /* Set user error string */
|
---|
| 905 | static void SetError(int idx, char* error, SnifferSession* session, int fatal)
|
---|
| 906 | {
|
---|
| 907 | GetError(idx, error);
|
---|
| 908 | Trace(idx);
|
---|
| 909 | if (session && fatal == FATAL_ERROR_STATE)
|
---|
| 910 | session->flags.fatalError = 1;
|
---|
| 911 | }
|
---|
| 912 |
|
---|
| 913 |
|
---|
| 914 | /* See if this IPV4 network order address has been registered */
|
---|
| 915 | /* return 1 is true, 0 is false */
|
---|
| 916 | static int IsServerRegistered(word32 addr)
|
---|
| 917 | {
|
---|
| 918 | int ret = 0; /* false */
|
---|
| 919 | SnifferServer* sniffer;
|
---|
| 920 |
|
---|
| 921 | LockMutex(&ServerListMutex);
|
---|
| 922 |
|
---|
| 923 | sniffer = ServerList;
|
---|
| 924 | while (sniffer) {
|
---|
| 925 | if (sniffer->server == addr) {
|
---|
| 926 | ret = 1;
|
---|
| 927 | break;
|
---|
| 928 | }
|
---|
| 929 | sniffer = sniffer->next;
|
---|
| 930 | }
|
---|
| 931 |
|
---|
| 932 | UnLockMutex(&ServerListMutex);
|
---|
| 933 |
|
---|
| 934 | return ret;
|
---|
| 935 | }
|
---|
| 936 |
|
---|
| 937 |
|
---|
| 938 | /* See if this port has been registered to watch */
|
---|
| 939 | /* return 1 is true, 0 is false */
|
---|
| 940 | static int IsPortRegistered(word32 port)
|
---|
| 941 | {
|
---|
| 942 | int ret = 0; /* false */
|
---|
| 943 | SnifferServer* sniffer;
|
---|
| 944 |
|
---|
| 945 | LockMutex(&ServerListMutex);
|
---|
| 946 |
|
---|
| 947 | sniffer = ServerList;
|
---|
| 948 | while (sniffer) {
|
---|
| 949 | if (sniffer->port == (int)port) {
|
---|
| 950 | ret = 1;
|
---|
| 951 | break;
|
---|
| 952 | }
|
---|
| 953 | sniffer = sniffer->next;
|
---|
| 954 | }
|
---|
| 955 |
|
---|
| 956 | UnLockMutex(&ServerListMutex);
|
---|
| 957 |
|
---|
| 958 | return ret;
|
---|
| 959 | }
|
---|
| 960 |
|
---|
| 961 |
|
---|
| 962 | /* Get SnifferServer from IP and Port */
|
---|
| 963 | static SnifferServer* GetSnifferServer(IpInfo* ipInfo, TcpInfo* tcpInfo)
|
---|
| 964 | {
|
---|
| 965 | SnifferServer* sniffer;
|
---|
| 966 |
|
---|
| 967 | LockMutex(&ServerListMutex);
|
---|
| 968 |
|
---|
| 969 | sniffer = ServerList;
|
---|
| 970 | while (sniffer) {
|
---|
| 971 | if (sniffer->port == tcpInfo->srcPort && sniffer->server == ipInfo->src)
|
---|
| 972 | break;
|
---|
| 973 | if (sniffer->port == tcpInfo->dstPort && sniffer->server == ipInfo->dst)
|
---|
| 974 | break;
|
---|
| 975 | sniffer = sniffer->next;
|
---|
| 976 | }
|
---|
| 977 |
|
---|
| 978 | UnLockMutex(&ServerListMutex);
|
---|
| 979 |
|
---|
| 980 | return sniffer;
|
---|
| 981 | }
|
---|
| 982 |
|
---|
| 983 |
|
---|
| 984 | /* Hash the Session Info, return hash row */
|
---|
| 985 | static word32 SessionHash(IpInfo* ipInfo, TcpInfo* tcpInfo)
|
---|
| 986 | {
|
---|
| 987 | word32 hash = ipInfo->src * ipInfo->dst;
|
---|
| 988 | hash *= tcpInfo->srcPort * tcpInfo->dstPort;
|
---|
| 989 |
|
---|
| 990 | return hash % HASH_SIZE;
|
---|
| 991 | }
|
---|
| 992 |
|
---|
| 993 |
|
---|
| 994 | /* Get Exisiting SnifferSession from IP and Port */
|
---|
| 995 | static SnifferSession* GetSnifferSession(IpInfo* ipInfo, TcpInfo* tcpInfo)
|
---|
| 996 | {
|
---|
| 997 | SnifferSession* session;
|
---|
| 998 | time_t currTime = time(NULL);
|
---|
| 999 | word32 row = SessionHash(ipInfo, tcpInfo);
|
---|
| 1000 |
|
---|
| 1001 | assert(row <= HASH_SIZE);
|
---|
| 1002 |
|
---|
| 1003 | LockMutex(&SessionMutex);
|
---|
| 1004 |
|
---|
| 1005 | session = SessionTable[row];
|
---|
| 1006 | while (session) {
|
---|
| 1007 | if (session->server == ipInfo->src && session->client == ipInfo->dst &&
|
---|
| 1008 | session->srvPort == tcpInfo->srcPort &&
|
---|
| 1009 | session->cliPort == tcpInfo->dstPort)
|
---|
| 1010 | break;
|
---|
| 1011 | if (session->client == ipInfo->src && session->server == ipInfo->dst &&
|
---|
| 1012 | session->cliPort == tcpInfo->srcPort &&
|
---|
| 1013 | session->srvPort == tcpInfo->dstPort)
|
---|
| 1014 | break;
|
---|
| 1015 |
|
---|
| 1016 | session = session->next;
|
---|
| 1017 | }
|
---|
| 1018 |
|
---|
| 1019 | if (session)
|
---|
| 1020 | session->lastUsed= currTime; /* keep session alive, remove stale will */
|
---|
| 1021 | /* leave alone */
|
---|
| 1022 | UnLockMutex(&SessionMutex);
|
---|
| 1023 |
|
---|
| 1024 | /* determine side */
|
---|
| 1025 | if (session) {
|
---|
| 1026 | if (ipInfo->dst == session->context->server &&
|
---|
| 1027 | tcpInfo->dstPort == session->context->port)
|
---|
| 1028 | session->flags.side = WOLFSSL_SERVER_END;
|
---|
| 1029 | else
|
---|
| 1030 | session->flags.side = WOLFSSL_CLIENT_END;
|
---|
| 1031 | }
|
---|
| 1032 |
|
---|
| 1033 | return session;
|
---|
| 1034 | }
|
---|
| 1035 |
|
---|
| 1036 |
|
---|
| 1037 | #ifdef HAVE_SNI
|
---|
| 1038 |
|
---|
| 1039 | static int LoadKeyFile(byte** keyBuf, word32* keyBufSz,
|
---|
| 1040 | const char* keyFile, int typeKey,
|
---|
| 1041 | const char* password)
|
---|
| 1042 | {
|
---|
| 1043 | byte* loadBuf;
|
---|
| 1044 | byte* saveBuf;
|
---|
| 1045 | long fileSz = 0;
|
---|
| 1046 | int saveBufSz;
|
---|
| 1047 | XFILE file;
|
---|
| 1048 | int ret;
|
---|
| 1049 |
|
---|
| 1050 | if (keyBuf == NULL || keyBufSz == NULL || keyFile == NULL) {
|
---|
| 1051 | return -1;
|
---|
| 1052 | }
|
---|
| 1053 |
|
---|
| 1054 | file = XFOPEN(keyFile, "rb");
|
---|
| 1055 | if (file == XBADFILE) return -1;
|
---|
| 1056 | XFSEEK(file, 0, XSEEK_END);
|
---|
| 1057 | fileSz = XFTELL(file);
|
---|
| 1058 | XREWIND(file);
|
---|
| 1059 |
|
---|
| 1060 | loadBuf = (byte*)malloc(fileSz);
|
---|
| 1061 | if (loadBuf == NULL) {
|
---|
| 1062 | XFCLOSE(file);
|
---|
| 1063 | return -1;
|
---|
| 1064 | }
|
---|
| 1065 |
|
---|
| 1066 | ret = (int)XFREAD(loadBuf, fileSz, 1, file);
|
---|
| 1067 | XFCLOSE(file);
|
---|
| 1068 |
|
---|
| 1069 | if (typeKey == SSL_FILETYPE_PEM) {
|
---|
| 1070 | saveBuf = (byte*)malloc(fileSz);
|
---|
| 1071 |
|
---|
| 1072 | saveBufSz = wolfSSL_KeyPemToDer(loadBuf, (int)fileSz,
|
---|
| 1073 | saveBuf, (int)fileSz, password);
|
---|
| 1074 | free(loadBuf);
|
---|
| 1075 |
|
---|
| 1076 | *keyBuf = saveBuf;
|
---|
| 1077 | *keyBufSz = (word32)saveBufSz;
|
---|
| 1078 | }
|
---|
| 1079 | else {
|
---|
| 1080 | *keyBuf = loadBuf;
|
---|
| 1081 | *keyBufSz = (word32)fileSz;
|
---|
| 1082 | }
|
---|
| 1083 |
|
---|
| 1084 |
|
---|
| 1085 | if (ret < 0) {
|
---|
| 1086 | return -1;
|
---|
| 1087 | }
|
---|
| 1088 |
|
---|
| 1089 | return ret;
|
---|
| 1090 | }
|
---|
| 1091 |
|
---|
| 1092 | #endif
|
---|
| 1093 |
|
---|
| 1094 |
|
---|
| 1095 | static int SetNamedPrivateKey(const char* name, const char* address, int port,
|
---|
| 1096 | const char* keyFile, int typeKey, const char* password, char* error)
|
---|
| 1097 | {
|
---|
| 1098 | SnifferServer* sniffer;
|
---|
| 1099 | int ret;
|
---|
| 1100 | int type = (typeKey == FILETYPE_PEM) ? SSL_FILETYPE_PEM :
|
---|
| 1101 | SSL_FILETYPE_ASN1;
|
---|
| 1102 | int isNew = 0;
|
---|
| 1103 | word32 serverIp;
|
---|
| 1104 |
|
---|
| 1105 | #ifdef HAVE_SNI
|
---|
| 1106 | NamedKey* namedKey = NULL;
|
---|
| 1107 | #endif
|
---|
| 1108 |
|
---|
| 1109 | (void)name;
|
---|
| 1110 | #ifdef HAVE_SNI
|
---|
| 1111 | if (name != NULL) {
|
---|
| 1112 | namedKey = (NamedKey*)malloc(sizeof(NamedKey));
|
---|
| 1113 | if (namedKey == NULL) {
|
---|
| 1114 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
| 1115 | return -1;
|
---|
| 1116 | }
|
---|
| 1117 | XMEMSET(namedKey, 0, sizeof(NamedKey));
|
---|
| 1118 |
|
---|
| 1119 | namedKey->nameSz = (word32)XSTRLEN(name);
|
---|
| 1120 | XSTRNCPY(namedKey->name, name, sizeof(namedKey->name));
|
---|
| 1121 | if (namedKey->nameSz >= sizeof(namedKey->name)) {
|
---|
| 1122 | namedKey->nameSz = sizeof(namedKey->name) - 1;
|
---|
| 1123 | namedKey->name[namedKey->nameSz] = '\0';
|
---|
| 1124 | }
|
---|
| 1125 |
|
---|
| 1126 | ret = LoadKeyFile(&namedKey->key, &namedKey->keySz,
|
---|
| 1127 | keyFile, type, password);
|
---|
| 1128 | if (ret < 0) {
|
---|
| 1129 | SetError(KEY_FILE_STR, error, NULL, 0);
|
---|
| 1130 | FreeNamedKey(namedKey);
|
---|
| 1131 | return -1;
|
---|
| 1132 | }
|
---|
| 1133 | }
|
---|
| 1134 | #endif
|
---|
| 1135 |
|
---|
| 1136 | serverIp = inet_addr(address);
|
---|
| 1137 | sniffer = ServerList;
|
---|
| 1138 | while (sniffer != NULL &&
|
---|
| 1139 | (sniffer->server != serverIp || sniffer->port != port)) {
|
---|
| 1140 | sniffer = sniffer->next;
|
---|
| 1141 | }
|
---|
| 1142 |
|
---|
| 1143 | if (sniffer == NULL) {
|
---|
| 1144 | isNew = 1;
|
---|
| 1145 | sniffer = (SnifferServer*)malloc(sizeof(SnifferServer));
|
---|
| 1146 | if (sniffer == NULL) {
|
---|
| 1147 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
| 1148 | #ifdef HAVE_SNI
|
---|
| 1149 | FreeNamedKey(namedKey);
|
---|
| 1150 | #endif
|
---|
| 1151 | return -1;
|
---|
| 1152 | }
|
---|
| 1153 | InitSnifferServer(sniffer);
|
---|
| 1154 |
|
---|
| 1155 | XSTRNCPY(sniffer->address, address, MAX_SERVER_ADDRESS-1);
|
---|
| 1156 | sniffer->address[MAX_SERVER_ADDRESS-1] = '\0';
|
---|
| 1157 | sniffer->server = serverIp;
|
---|
| 1158 | sniffer->port = port;
|
---|
| 1159 |
|
---|
| 1160 | sniffer->ctx = SSL_CTX_new(TLSv1_client_method());
|
---|
| 1161 | if (!sniffer->ctx) {
|
---|
| 1162 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
| 1163 | #ifdef HAVE_SNI
|
---|
| 1164 | FreeNamedKey(namedKey);
|
---|
| 1165 | #endif
|
---|
| 1166 | FreeSnifferServer(sniffer);
|
---|
| 1167 | return -1;
|
---|
| 1168 | }
|
---|
| 1169 | }
|
---|
| 1170 |
|
---|
| 1171 | if (name == NULL) {
|
---|
| 1172 | if (password) {
|
---|
| 1173 | SSL_CTX_set_default_passwd_cb(sniffer->ctx, SetPassword);
|
---|
| 1174 | SSL_CTX_set_default_passwd_cb_userdata(
|
---|
| 1175 | sniffer->ctx, (void*)password);
|
---|
| 1176 | }
|
---|
| 1177 | ret = SSL_CTX_use_PrivateKey_file(sniffer->ctx, keyFile, type);
|
---|
| 1178 | if (ret != SSL_SUCCESS) {
|
---|
| 1179 | SetError(KEY_FILE_STR, error, NULL, 0);
|
---|
| 1180 | if (isNew)
|
---|
| 1181 | FreeSnifferServer(sniffer);
|
---|
| 1182 | return -1;
|
---|
| 1183 | }
|
---|
| 1184 | }
|
---|
| 1185 | #ifdef HAVE_SNI
|
---|
| 1186 | else {
|
---|
| 1187 | LockMutex(&sniffer->namedKeysMutex);
|
---|
| 1188 | namedKey->next = sniffer->namedKeys;
|
---|
| 1189 | sniffer->namedKeys = namedKey;
|
---|
| 1190 | UnLockMutex(&sniffer->namedKeysMutex);
|
---|
| 1191 | }
|
---|
| 1192 | #endif
|
---|
| 1193 |
|
---|
| 1194 | if (isNew) {
|
---|
| 1195 | sniffer->next = ServerList;
|
---|
| 1196 | ServerList = sniffer;
|
---|
| 1197 | }
|
---|
| 1198 |
|
---|
| 1199 | return 0;
|
---|
| 1200 | }
|
---|
| 1201 |
|
---|
| 1202 |
|
---|
| 1203 | #ifdef HAVE_SNI
|
---|
| 1204 |
|
---|
| 1205 | /* Sets the private key for a specific name, server and port */
|
---|
| 1206 | /* returns 0 on success, -1 on error */
|
---|
| 1207 | int ssl_SetNamedPrivateKey(const char* name,
|
---|
| 1208 | const char* address, int port,
|
---|
| 1209 | const char* keyFile, int typeKey,
|
---|
| 1210 | const char* password, char* error)
|
---|
| 1211 | {
|
---|
| 1212 | int ret;
|
---|
| 1213 |
|
---|
| 1214 | TraceHeader();
|
---|
| 1215 | TraceSetNamedServer(name, address, port, keyFile);
|
---|
| 1216 |
|
---|
| 1217 | LockMutex(&ServerListMutex);
|
---|
| 1218 | ret = SetNamedPrivateKey(name, address, port, keyFile,
|
---|
| 1219 | typeKey, password, error);
|
---|
| 1220 | UnLockMutex(&ServerListMutex);
|
---|
| 1221 |
|
---|
| 1222 | if (ret == 0)
|
---|
| 1223 | Trace(NEW_SERVER_STR);
|
---|
| 1224 |
|
---|
| 1225 | return ret;
|
---|
| 1226 | }
|
---|
| 1227 |
|
---|
| 1228 | #endif
|
---|
| 1229 |
|
---|
| 1230 |
|
---|
| 1231 | /* Sets the private key for a specific server and port */
|
---|
| 1232 | /* returns 0 on success, -1 on error */
|
---|
| 1233 | int ssl_SetPrivateKey(const char* address, int port, const char* keyFile,
|
---|
| 1234 | int typeKey, const char* password, char* error)
|
---|
| 1235 | {
|
---|
| 1236 | int ret;
|
---|
| 1237 |
|
---|
| 1238 | TraceHeader();
|
---|
| 1239 | TraceSetServer(address, port, keyFile);
|
---|
| 1240 |
|
---|
| 1241 | LockMutex(&ServerListMutex);
|
---|
| 1242 | ret = SetNamedPrivateKey(NULL, address, port, keyFile,
|
---|
| 1243 | typeKey, password, error);
|
---|
| 1244 | UnLockMutex(&ServerListMutex);
|
---|
| 1245 |
|
---|
| 1246 | if (ret == 0)
|
---|
| 1247 | Trace(NEW_SERVER_STR);
|
---|
| 1248 |
|
---|
| 1249 | return ret;
|
---|
| 1250 | }
|
---|
| 1251 |
|
---|
| 1252 |
|
---|
| 1253 | /* Check IP Header for IPV4, TCP, and a registered server address */
|
---|
| 1254 | /* returns 0 on success, -1 on error */
|
---|
| 1255 | static int CheckIpHdr(IpHdr* iphdr, IpInfo* info, int length, char* error)
|
---|
| 1256 | {
|
---|
| 1257 | int version = IP_V(iphdr);
|
---|
| 1258 |
|
---|
| 1259 | TraceIP(iphdr);
|
---|
| 1260 | Trace(IP_CHECK_STR);
|
---|
| 1261 |
|
---|
| 1262 | if (version != IPV4) {
|
---|
| 1263 | SetError(BAD_IPVER_STR, error, NULL, 0);
|
---|
| 1264 | return -1;
|
---|
| 1265 | }
|
---|
| 1266 |
|
---|
| 1267 | if (iphdr->protocol != TCP_PROTOCOL) {
|
---|
| 1268 | SetError(BAD_PROTO_STR, error, NULL, 0);
|
---|
| 1269 | return -1;
|
---|
| 1270 | }
|
---|
| 1271 |
|
---|
| 1272 | if (!IsServerRegistered(iphdr->src) && !IsServerRegistered(iphdr->dst)) {
|
---|
| 1273 | SetError(SERVER_NOT_REG_STR, error, NULL, 0);
|
---|
| 1274 | return -1;
|
---|
| 1275 | }
|
---|
| 1276 |
|
---|
| 1277 | info->length = IP_HL(iphdr);
|
---|
| 1278 | info->total = ntohs(iphdr->length);
|
---|
| 1279 | info->src = iphdr->src;
|
---|
| 1280 | info->dst = iphdr->dst;
|
---|
| 1281 |
|
---|
| 1282 | if (info->total == 0)
|
---|
| 1283 | info->total = length; /* reassembled may be off */
|
---|
| 1284 |
|
---|
| 1285 | return 0;
|
---|
| 1286 | }
|
---|
| 1287 |
|
---|
| 1288 |
|
---|
| 1289 | /* Check TCP Header for a registered port */
|
---|
| 1290 | /* returns 0 on success, -1 on error */
|
---|
| 1291 | static int CheckTcpHdr(TcpHdr* tcphdr, TcpInfo* info, char* error)
|
---|
| 1292 | {
|
---|
| 1293 | TraceTcp(tcphdr);
|
---|
| 1294 | Trace(TCP_CHECK_STR);
|
---|
| 1295 | info->srcPort = ntohs(tcphdr->srcPort);
|
---|
| 1296 | info->dstPort = ntohs(tcphdr->dstPort);
|
---|
| 1297 | info->length = TCP_LEN(tcphdr);
|
---|
| 1298 | info->sequence = ntohl(tcphdr->sequence);
|
---|
| 1299 | info->fin = tcphdr->flags & TCP_FIN;
|
---|
| 1300 | info->rst = tcphdr->flags & TCP_RST;
|
---|
| 1301 | info->syn = tcphdr->flags & TCP_SYN;
|
---|
| 1302 | info->ack = tcphdr->flags & TCP_ACK;
|
---|
| 1303 | if (info->ack)
|
---|
| 1304 | info->ackNumber = ntohl(tcphdr->ack);
|
---|
| 1305 |
|
---|
| 1306 | if (!IsPortRegistered(info->srcPort) && !IsPortRegistered(info->dstPort)) {
|
---|
| 1307 | SetError(SERVER_PORT_NOT_REG_STR, error, NULL, 0);
|
---|
| 1308 | return -1;
|
---|
| 1309 | }
|
---|
| 1310 |
|
---|
| 1311 | return 0;
|
---|
| 1312 | }
|
---|
| 1313 |
|
---|
| 1314 |
|
---|
| 1315 | /* Decode Record Layer Header */
|
---|
| 1316 | static int GetRecordHeader(const byte* input, RecordLayerHeader* rh, int* size)
|
---|
| 1317 | {
|
---|
| 1318 | XMEMCPY(rh, input, RECORD_HEADER_SZ);
|
---|
| 1319 | *size = (rh->length[0] << 8) | rh->length[1];
|
---|
| 1320 |
|
---|
| 1321 | if (*size > (MAX_RECORD_SIZE + COMP_EXTRA + MAX_MSG_EXTRA))
|
---|
| 1322 | return LENGTH_ERROR;
|
---|
| 1323 |
|
---|
| 1324 | return 0;
|
---|
| 1325 | }
|
---|
| 1326 |
|
---|
| 1327 |
|
---|
| 1328 | /* Process Client Key Exchange, RSA only */
|
---|
| 1329 | static int ProcessClientKeyExchange(const byte* input, int* sslBytes,
|
---|
| 1330 | SnifferSession* session, char* error)
|
---|
| 1331 | {
|
---|
| 1332 | word32 idx = 0;
|
---|
| 1333 | RsaKey key;
|
---|
| 1334 | int ret;
|
---|
| 1335 |
|
---|
| 1336 | if (session->sslServer->buffers.key.buffer == NULL ||
|
---|
| 1337 | session->sslServer->buffers.key.length == 0) {
|
---|
| 1338 |
|
---|
| 1339 | SetError(RSA_KEY_MISSING_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1340 | return -1;
|
---|
| 1341 | }
|
---|
| 1342 | ret = wc_InitRsaKey(&key, 0);
|
---|
| 1343 | if (ret == 0)
|
---|
| 1344 | ret = wc_RsaPrivateKeyDecode(session->sslServer->buffers.key.buffer,
|
---|
| 1345 | &idx, &key, session->sslServer->buffers.key.length);
|
---|
| 1346 | if (ret == 0) {
|
---|
| 1347 | int length = wc_RsaEncryptSize(&key);
|
---|
| 1348 |
|
---|
| 1349 | if (IsTLS(session->sslServer))
|
---|
| 1350 | input += 2; /* tls pre length */
|
---|
| 1351 |
|
---|
| 1352 | if (length > *sslBytes) {
|
---|
| 1353 | SetError(PARTIAL_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1354 | wc_FreeRsaKey(&key);
|
---|
| 1355 | return -1;
|
---|
| 1356 | }
|
---|
| 1357 | ret = wc_RsaPrivateDecrypt(input, length,
|
---|
| 1358 | session->sslServer->arrays->preMasterSecret,SECRET_LEN, &key);
|
---|
| 1359 |
|
---|
| 1360 | if (ret != SECRET_LEN) {
|
---|
| 1361 | SetError(RSA_DECRYPT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1362 | wc_FreeRsaKey(&key);
|
---|
| 1363 | return -1;
|
---|
| 1364 | }
|
---|
| 1365 | session->sslServer->arrays->preMasterSz = SECRET_LEN;
|
---|
| 1366 |
|
---|
| 1367 | /* store for client side as well */
|
---|
| 1368 | XMEMCPY(session->sslClient->arrays->preMasterSecret,
|
---|
| 1369 | session->sslServer->arrays->preMasterSecret, SECRET_LEN);
|
---|
| 1370 | session->sslClient->arrays->preMasterSz = SECRET_LEN;
|
---|
| 1371 |
|
---|
| 1372 | #ifdef SHOW_SECRETS
|
---|
| 1373 | {
|
---|
| 1374 | int i;
|
---|
| 1375 | printf("pre master secret: ");
|
---|
| 1376 | for (i = 0; i < SECRET_LEN; i++)
|
---|
| 1377 | printf("%02x", session->sslServer->arrays->preMasterSecret[i]);
|
---|
| 1378 | printf("\n");
|
---|
| 1379 | }
|
---|
| 1380 | #endif
|
---|
| 1381 | }
|
---|
| 1382 | else {
|
---|
| 1383 | SetError(RSA_DECODE_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1384 | wc_FreeRsaKey(&key);
|
---|
| 1385 | return -1;
|
---|
| 1386 | }
|
---|
| 1387 |
|
---|
| 1388 | if (SetCipherSpecs(session->sslServer) != 0) {
|
---|
| 1389 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1390 | wc_FreeRsaKey(&key);
|
---|
| 1391 | return -1;
|
---|
| 1392 | }
|
---|
| 1393 |
|
---|
| 1394 | if (SetCipherSpecs(session->sslClient) != 0) {
|
---|
| 1395 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1396 | wc_FreeRsaKey(&key);
|
---|
| 1397 | return -1;
|
---|
| 1398 | }
|
---|
| 1399 |
|
---|
| 1400 | ret = MakeMasterSecret(session->sslServer);
|
---|
| 1401 | ret += MakeMasterSecret(session->sslClient);
|
---|
| 1402 | ret += SetKeysSide(session->sslServer, ENCRYPT_AND_DECRYPT_SIDE);
|
---|
| 1403 | ret += SetKeysSide(session->sslClient, ENCRYPT_AND_DECRYPT_SIDE);
|
---|
| 1404 |
|
---|
| 1405 | if (ret != 0) {
|
---|
| 1406 | SetError(BAD_DERIVE_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1407 | return -1;
|
---|
| 1408 | }
|
---|
| 1409 |
|
---|
| 1410 | #ifdef SHOW_SECRETS
|
---|
| 1411 | {
|
---|
| 1412 | int i;
|
---|
| 1413 | printf("server master secret: ");
|
---|
| 1414 | for (i = 0; i < SECRET_LEN; i++)
|
---|
| 1415 | printf("%02x", session->sslServer->arrays->masterSecret[i]);
|
---|
| 1416 | printf("\n");
|
---|
| 1417 |
|
---|
| 1418 | printf("client master secret: ");
|
---|
| 1419 | for (i = 0; i < SECRET_LEN; i++)
|
---|
| 1420 | printf("%02x", session->sslClient->arrays->masterSecret[i]);
|
---|
| 1421 | printf("\n");
|
---|
| 1422 |
|
---|
| 1423 | printf("server suite = %d\n", session->sslServer->options.cipherSuite);
|
---|
| 1424 | printf("client suite = %d\n", session->sslClient->options.cipherSuite);
|
---|
| 1425 | }
|
---|
| 1426 | #endif
|
---|
| 1427 |
|
---|
| 1428 | wc_FreeRsaKey(&key);
|
---|
| 1429 | return ret;
|
---|
| 1430 | }
|
---|
| 1431 |
|
---|
| 1432 |
|
---|
| 1433 | /* Process Session Ticket */
|
---|
| 1434 | static int ProcessSessionTicket(const byte* input, int* sslBytes,
|
---|
| 1435 | SnifferSession* session, char* error)
|
---|
| 1436 | {
|
---|
| 1437 | word16 len;
|
---|
| 1438 |
|
---|
| 1439 | /* make sure can read through hint and len */
|
---|
| 1440 | if (TICKET_HINT_LEN + LENGTH_SZ > *sslBytes) {
|
---|
| 1441 | SetError(BAD_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1442 | return -1;
|
---|
| 1443 | }
|
---|
| 1444 |
|
---|
| 1445 | input += TICKET_HINT_LEN; /* skip over hint */
|
---|
| 1446 | *sslBytes -= TICKET_HINT_LEN;
|
---|
| 1447 |
|
---|
| 1448 | len = (word16)((input[0] << 8) | input[1]);
|
---|
| 1449 | input += LENGTH_SZ;
|
---|
| 1450 | *sslBytes -= LENGTH_SZ;
|
---|
| 1451 |
|
---|
| 1452 | /* make sure can read through ticket */
|
---|
| 1453 | if (len > *sslBytes || len < ID_LEN) {
|
---|
| 1454 | SetError(BAD_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1455 | return -1;
|
---|
| 1456 | }
|
---|
| 1457 |
|
---|
| 1458 | /* store session with macID as sessionID */
|
---|
| 1459 | session->sslServer->options.haveSessionId = 1;
|
---|
| 1460 | XMEMCPY(session->sslServer->arrays->sessionID, input + len - ID_LEN,ID_LEN);
|
---|
| 1461 |
|
---|
| 1462 | return 0;
|
---|
| 1463 | }
|
---|
| 1464 |
|
---|
| 1465 |
|
---|
| 1466 | /* Process Server Hello */
|
---|
| 1467 | static int ProcessServerHello(const byte* input, int* sslBytes,
|
---|
| 1468 | SnifferSession* session, char* error)
|
---|
| 1469 | {
|
---|
| 1470 | ProtocolVersion pv;
|
---|
| 1471 | byte b;
|
---|
| 1472 | int toRead = VERSION_SZ + RAN_LEN + ENUM_LEN;
|
---|
| 1473 | int doResume = 0;
|
---|
| 1474 |
|
---|
| 1475 | /* make sure we didn't miss ClientHello */
|
---|
| 1476 | if (session->flags.clientHello == 0) {
|
---|
| 1477 | SetError(MISSED_CLIENT_HELLO_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1478 | return -1;
|
---|
| 1479 | }
|
---|
| 1480 |
|
---|
| 1481 | /* make sure can read through session len */
|
---|
| 1482 | if (toRead > *sslBytes) {
|
---|
| 1483 | SetError(SERVER_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1484 | return -1;
|
---|
| 1485 | }
|
---|
| 1486 |
|
---|
| 1487 | XMEMCPY(&pv, input, VERSION_SZ);
|
---|
| 1488 | input += VERSION_SZ;
|
---|
| 1489 | *sslBytes -= VERSION_SZ;
|
---|
| 1490 |
|
---|
| 1491 | session->sslServer->version = pv;
|
---|
| 1492 | session->sslClient->version = pv;
|
---|
| 1493 |
|
---|
| 1494 | XMEMCPY(session->sslServer->arrays->serverRandom, input, RAN_LEN);
|
---|
| 1495 | XMEMCPY(session->sslClient->arrays->serverRandom, input, RAN_LEN);
|
---|
| 1496 | input += RAN_LEN;
|
---|
| 1497 | *sslBytes -= RAN_LEN;
|
---|
| 1498 |
|
---|
| 1499 | b = *input++;
|
---|
| 1500 | *sslBytes -= 1;
|
---|
| 1501 |
|
---|
| 1502 | /* make sure can read through compression */
|
---|
| 1503 | if ( (b + SUITE_LEN + ENUM_LEN) > *sslBytes) {
|
---|
| 1504 | SetError(SERVER_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1505 | return -1;
|
---|
| 1506 | }
|
---|
| 1507 | if (b) {
|
---|
| 1508 | XMEMCPY(session->sslServer->arrays->sessionID, input, ID_LEN);
|
---|
| 1509 | session->sslServer->options.haveSessionId = 1;
|
---|
| 1510 | }
|
---|
| 1511 | input += b;
|
---|
| 1512 | *sslBytes -= b;
|
---|
| 1513 |
|
---|
| 1514 | /* cipher suite */
|
---|
| 1515 | b = *input++; /* first byte, ECC or not */
|
---|
| 1516 | session->sslServer->options.cipherSuite0 = b;
|
---|
| 1517 | session->sslClient->options.cipherSuite0 = b;
|
---|
| 1518 | b = *input++;
|
---|
| 1519 | session->sslServer->options.cipherSuite = b;
|
---|
| 1520 | session->sslClient->options.cipherSuite = b;
|
---|
| 1521 | *sslBytes -= SUITE_LEN;
|
---|
| 1522 |
|
---|
| 1523 | /* compression */
|
---|
| 1524 | b = *input++;
|
---|
| 1525 | *sslBytes -= ENUM_LEN;
|
---|
| 1526 |
|
---|
| 1527 | if (b) {
|
---|
| 1528 | SetError(BAD_COMPRESSION_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1529 | return -1;
|
---|
| 1530 | }
|
---|
| 1531 |
|
---|
| 1532 | if (session->sslServer->options.haveSessionId &&
|
---|
| 1533 | XMEMCMP(session->sslServer->arrays->sessionID,
|
---|
| 1534 | session->sslClient->arrays->sessionID, ID_LEN) == 0)
|
---|
| 1535 | doResume = 1;
|
---|
| 1536 | else if (session->sslClient->options.haveSessionId == 0 &&
|
---|
| 1537 | session->sslServer->options.haveSessionId == 0 &&
|
---|
| 1538 | session->ticketID)
|
---|
| 1539 | doResume = 1;
|
---|
| 1540 |
|
---|
| 1541 | if (session->ticketID && doResume) {
|
---|
| 1542 | /* use ticketID to retrieve from session, prefer over sessionID */
|
---|
| 1543 | XMEMCPY(session->sslServer->arrays->sessionID,session->ticketID,ID_LEN);
|
---|
| 1544 | session->sslServer->options.haveSessionId = 1; /* may not have
|
---|
| 1545 | actual sessionID */
|
---|
| 1546 | }
|
---|
| 1547 |
|
---|
| 1548 | if (doResume ) {
|
---|
| 1549 | int ret = 0;
|
---|
| 1550 | SSL_SESSION* resume = GetSession(session->sslServer,
|
---|
| 1551 | session->sslServer->arrays->masterSecret);
|
---|
| 1552 | if (resume == NULL) {
|
---|
| 1553 | SetError(BAD_SESSION_RESUME_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1554 | return -1;
|
---|
| 1555 | }
|
---|
| 1556 | /* make sure client has master secret too */
|
---|
| 1557 | XMEMCPY(session->sslClient->arrays->masterSecret,
|
---|
| 1558 | session->sslServer->arrays->masterSecret, SECRET_LEN);
|
---|
| 1559 | session->flags.resuming = 1;
|
---|
| 1560 |
|
---|
| 1561 | Trace(SERVER_DID_RESUMPTION_STR);
|
---|
| 1562 | if (SetCipherSpecs(session->sslServer) != 0) {
|
---|
| 1563 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1564 | return -1;
|
---|
| 1565 | }
|
---|
| 1566 |
|
---|
| 1567 | if (SetCipherSpecs(session->sslClient) != 0) {
|
---|
| 1568 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1569 | return -1;
|
---|
| 1570 | }
|
---|
| 1571 |
|
---|
| 1572 | if (session->sslServer->options.tls) {
|
---|
| 1573 | ret = DeriveTlsKeys(session->sslServer);
|
---|
| 1574 | ret += DeriveTlsKeys(session->sslClient);
|
---|
| 1575 | }
|
---|
| 1576 | else {
|
---|
| 1577 | ret = DeriveKeys(session->sslServer);
|
---|
| 1578 | ret += DeriveKeys(session->sslClient);
|
---|
| 1579 | }
|
---|
| 1580 | ret += SetKeysSide(session->sslServer, ENCRYPT_AND_DECRYPT_SIDE);
|
---|
| 1581 | ret += SetKeysSide(session->sslClient, ENCRYPT_AND_DECRYPT_SIDE);
|
---|
| 1582 |
|
---|
| 1583 | if (ret != 0) {
|
---|
| 1584 | SetError(BAD_DERIVE_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1585 | return -1;
|
---|
| 1586 | }
|
---|
| 1587 | }
|
---|
| 1588 | #ifdef SHOW_SECRETS
|
---|
| 1589 | {
|
---|
| 1590 | int i;
|
---|
| 1591 | printf("cipher suite = 0x%02x\n",
|
---|
| 1592 | session->sslServer->options.cipherSuite);
|
---|
| 1593 | printf("server random: ");
|
---|
| 1594 | for (i = 0; i < RAN_LEN; i++)
|
---|
| 1595 | printf("%02x", session->sslServer->arrays->serverRandom[i]);
|
---|
| 1596 | printf("\n");
|
---|
| 1597 | }
|
---|
| 1598 | #endif
|
---|
| 1599 | return 0;
|
---|
| 1600 | }
|
---|
| 1601 |
|
---|
| 1602 |
|
---|
| 1603 | /* Process normal Client Hello */
|
---|
| 1604 | static int ProcessClientHello(const byte* input, int* sslBytes,
|
---|
| 1605 | SnifferSession* session, char* error)
|
---|
| 1606 | {
|
---|
| 1607 | byte bLen;
|
---|
| 1608 | word16 len;
|
---|
| 1609 | int toRead = VERSION_SZ + RAN_LEN + ENUM_LEN;
|
---|
| 1610 |
|
---|
| 1611 | #ifdef HAVE_SNI
|
---|
| 1612 | {
|
---|
| 1613 | byte name[MAX_SERVER_NAME];
|
---|
| 1614 | word32 nameSz = sizeof(name);
|
---|
| 1615 | int ret;
|
---|
| 1616 |
|
---|
| 1617 | ret = wolfSSL_SNI_GetFromBuffer(
|
---|
| 1618 | input - HANDSHAKE_HEADER_SZ - RECORD_HEADER_SZ,
|
---|
| 1619 | *sslBytes + HANDSHAKE_HEADER_SZ + RECORD_HEADER_SZ,
|
---|
| 1620 | WOLFSSL_SNI_HOST_NAME, name, &nameSz);
|
---|
| 1621 |
|
---|
| 1622 | if (ret == SSL_SUCCESS) {
|
---|
| 1623 | NamedKey* namedKey;
|
---|
| 1624 |
|
---|
| 1625 | if (nameSz >= sizeof(name))
|
---|
| 1626 | nameSz = sizeof(name) - 1;
|
---|
| 1627 | name[nameSz] = 0;
|
---|
| 1628 | LockMutex(&session->context->namedKeysMutex);
|
---|
| 1629 | namedKey = session->context->namedKeys;
|
---|
| 1630 | while (namedKey != NULL) {
|
---|
| 1631 | if (nameSz == namedKey->nameSz &&
|
---|
| 1632 | XSTRNCMP((char*)name, namedKey->name, nameSz) == 0) {
|
---|
| 1633 | if (wolfSSL_use_PrivateKey_buffer(session->sslServer,
|
---|
| 1634 | namedKey->key, namedKey->keySz,
|
---|
| 1635 | SSL_FILETYPE_ASN1) != SSL_SUCCESS) {
|
---|
| 1636 | UnLockMutex(&session->context->namedKeysMutex);
|
---|
| 1637 | SetError(CLIENT_HELLO_LATE_KEY_STR, error, session,
|
---|
| 1638 | FATAL_ERROR_STATE);
|
---|
| 1639 | return -1;
|
---|
| 1640 | }
|
---|
| 1641 | break;
|
---|
| 1642 | }
|
---|
| 1643 | else
|
---|
| 1644 | namedKey = namedKey->next;
|
---|
| 1645 | }
|
---|
| 1646 | UnLockMutex(&session->context->namedKeysMutex);
|
---|
| 1647 | }
|
---|
| 1648 | }
|
---|
| 1649 | #endif
|
---|
| 1650 |
|
---|
| 1651 | session->flags.clientHello = 1; /* don't process again */
|
---|
| 1652 |
|
---|
| 1653 | /* make sure can read up to session len */
|
---|
| 1654 | if (toRead > *sslBytes) {
|
---|
| 1655 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1656 | return -1;
|
---|
| 1657 | }
|
---|
| 1658 |
|
---|
| 1659 | /* skip, get negotiated one from server hello */
|
---|
| 1660 | input += VERSION_SZ;
|
---|
| 1661 | *sslBytes -= VERSION_SZ;
|
---|
| 1662 |
|
---|
| 1663 | XMEMCPY(session->sslServer->arrays->clientRandom, input, RAN_LEN);
|
---|
| 1664 | XMEMCPY(session->sslClient->arrays->clientRandom, input, RAN_LEN);
|
---|
| 1665 |
|
---|
| 1666 | input += RAN_LEN;
|
---|
| 1667 | *sslBytes -= RAN_LEN;
|
---|
| 1668 |
|
---|
| 1669 | /* store session in case trying to resume */
|
---|
| 1670 | bLen = *input++;
|
---|
| 1671 | *sslBytes -= ENUM_LEN;
|
---|
| 1672 | if (bLen) {
|
---|
| 1673 | if (ID_LEN > *sslBytes) {
|
---|
| 1674 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1675 | return -1;
|
---|
| 1676 | }
|
---|
| 1677 | Trace(CLIENT_RESUME_TRY_STR);
|
---|
| 1678 | XMEMCPY(session->sslClient->arrays->sessionID, input, ID_LEN);
|
---|
| 1679 | session->sslClient->options.haveSessionId = 1;
|
---|
| 1680 | }
|
---|
| 1681 | #ifdef SHOW_SECRETS
|
---|
| 1682 | {
|
---|
| 1683 | int i;
|
---|
| 1684 | printf("client random: ");
|
---|
| 1685 | for (i = 0; i < RAN_LEN; i++)
|
---|
| 1686 | printf("%02x", session->sslServer->arrays->clientRandom[i]);
|
---|
| 1687 | printf("\n");
|
---|
| 1688 | }
|
---|
| 1689 | #endif
|
---|
| 1690 |
|
---|
| 1691 | input += bLen;
|
---|
| 1692 | *sslBytes -= bLen;
|
---|
| 1693 |
|
---|
| 1694 | /* skip cipher suites */
|
---|
| 1695 | /* make sure can read len */
|
---|
| 1696 | if (SUITE_LEN > *sslBytes) {
|
---|
| 1697 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1698 | return -1;
|
---|
| 1699 | }
|
---|
| 1700 | len = (word16)((input[0] << 8) | input[1]);
|
---|
| 1701 | input += SUITE_LEN;
|
---|
| 1702 | *sslBytes -= SUITE_LEN;
|
---|
| 1703 | /* make sure can read suites + comp len */
|
---|
| 1704 | if (len + ENUM_LEN > *sslBytes) {
|
---|
| 1705 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1706 | return -1;
|
---|
| 1707 | }
|
---|
| 1708 | input += len;
|
---|
| 1709 | *sslBytes -= len;
|
---|
| 1710 |
|
---|
| 1711 | /* skip compression */
|
---|
| 1712 | bLen = *input++;
|
---|
| 1713 | *sslBytes -= ENUM_LEN;
|
---|
| 1714 | /* make sure can read len */
|
---|
| 1715 | if (bLen > *sslBytes) {
|
---|
| 1716 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1717 | return -1;
|
---|
| 1718 | }
|
---|
| 1719 | input += bLen;
|
---|
| 1720 | *sslBytes -= bLen;
|
---|
| 1721 |
|
---|
| 1722 | if (*sslBytes == 0) {
|
---|
| 1723 | /* no extensions */
|
---|
| 1724 | return 0;
|
---|
| 1725 | }
|
---|
| 1726 |
|
---|
| 1727 | /* skip extensions until session ticket */
|
---|
| 1728 | /* make sure can read len */
|
---|
| 1729 | if (SUITE_LEN > *sslBytes) {
|
---|
| 1730 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1731 | return -1;
|
---|
| 1732 | }
|
---|
| 1733 | len = (word16)((input[0] << 8) | input[1]);
|
---|
| 1734 | input += SUITE_LEN;
|
---|
| 1735 | *sslBytes -= SUITE_LEN;
|
---|
| 1736 | /* make sure can read through all extensions */
|
---|
| 1737 | if (len > *sslBytes) {
|
---|
| 1738 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1739 | return -1;
|
---|
| 1740 | }
|
---|
| 1741 |
|
---|
| 1742 | while (len > EXT_TYPE_SZ + LENGTH_SZ) {
|
---|
| 1743 | byte extType[EXT_TYPE_SZ];
|
---|
| 1744 | word16 extLen;
|
---|
| 1745 |
|
---|
| 1746 | extType[0] = input[0];
|
---|
| 1747 | extType[1] = input[1];
|
---|
| 1748 | input += EXT_TYPE_SZ;
|
---|
| 1749 | *sslBytes -= EXT_TYPE_SZ;
|
---|
| 1750 |
|
---|
| 1751 | extLen = (word16)((input[0] << 8) | input[1]);
|
---|
| 1752 | input += LENGTH_SZ;
|
---|
| 1753 | *sslBytes -= LENGTH_SZ;
|
---|
| 1754 |
|
---|
| 1755 | /* make sure can read through individual extension */
|
---|
| 1756 | if (extLen > *sslBytes) {
|
---|
| 1757 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1758 | return -1;
|
---|
| 1759 | }
|
---|
| 1760 |
|
---|
| 1761 | if (extType[0] == 0x00 && extType[1] == TICKET_EXT_ID) {
|
---|
| 1762 |
|
---|
| 1763 | /* make sure can read through ticket if there is a non blank one */
|
---|
| 1764 | if (extLen && extLen < ID_LEN) {
|
---|
| 1765 | SetError(CLIENT_HELLO_INPUT_STR, error, session,
|
---|
| 1766 | FATAL_ERROR_STATE);
|
---|
| 1767 | return -1;
|
---|
| 1768 | }
|
---|
| 1769 |
|
---|
| 1770 | if (extLen) {
|
---|
| 1771 | if (session->ticketID == 0) {
|
---|
| 1772 | session->ticketID = (byte*)malloc(ID_LEN);
|
---|
| 1773 | if (session->ticketID == 0) {
|
---|
| 1774 | SetError(MEMORY_STR, error, session,
|
---|
| 1775 | FATAL_ERROR_STATE);
|
---|
| 1776 | return -1;
|
---|
| 1777 | }
|
---|
| 1778 | }
|
---|
| 1779 | XMEMCPY(session->ticketID, input + extLen - ID_LEN, ID_LEN);
|
---|
| 1780 | }
|
---|
| 1781 | }
|
---|
| 1782 |
|
---|
| 1783 | input += extLen;
|
---|
| 1784 | *sslBytes -= extLen;
|
---|
| 1785 | len -= extLen + EXT_TYPE_SZ + LENGTH_SZ;
|
---|
| 1786 | }
|
---|
| 1787 |
|
---|
| 1788 | return 0;
|
---|
| 1789 | }
|
---|
| 1790 |
|
---|
| 1791 |
|
---|
| 1792 | /* Process Finished */
|
---|
| 1793 | static int ProcessFinished(const byte* input, int size, int* sslBytes,
|
---|
| 1794 | SnifferSession* session, char* error)
|
---|
| 1795 | {
|
---|
| 1796 | SSL* ssl;
|
---|
| 1797 | word32 inOutIdx = 0;
|
---|
| 1798 | int ret;
|
---|
| 1799 |
|
---|
| 1800 | if (session->flags.side == WOLFSSL_SERVER_END)
|
---|
| 1801 | ssl = session->sslServer;
|
---|
| 1802 | else
|
---|
| 1803 | ssl = session->sslClient;
|
---|
| 1804 |
|
---|
| 1805 | ret = DoFinished(ssl, input, &inOutIdx, (word32) size, (word32) *sslBytes,
|
---|
| 1806 | SNIFF);
|
---|
| 1807 | *sslBytes -= (int)inOutIdx;
|
---|
| 1808 |
|
---|
| 1809 | if (ret < 0) {
|
---|
| 1810 | SetError(BAD_FINISHED_MSG, error, session, FATAL_ERROR_STATE);
|
---|
| 1811 | return ret;
|
---|
| 1812 | }
|
---|
| 1813 |
|
---|
| 1814 | if (ret == 0 && session->flags.cached == 0) {
|
---|
| 1815 | if (session->sslServer->options.haveSessionId) {
|
---|
| 1816 | WOLFSSL_SESSION* sess = GetSession(session->sslServer, NULL);
|
---|
| 1817 | if (sess == NULL)
|
---|
| 1818 | AddSession(session->sslServer); /* don't re add */
|
---|
| 1819 | session->flags.cached = 1;
|
---|
| 1820 | }
|
---|
| 1821 | }
|
---|
| 1822 |
|
---|
| 1823 | /* If receiving a finished message from one side, free the resources
|
---|
| 1824 | * from the other side's tracker. */
|
---|
| 1825 | if (session->flags.side == WOLFSSL_SERVER_END)
|
---|
| 1826 | FreeHandshakeResources(session->sslClient);
|
---|
| 1827 | else
|
---|
| 1828 | FreeHandshakeResources(session->sslServer);
|
---|
| 1829 |
|
---|
| 1830 | return ret;
|
---|
| 1831 | }
|
---|
| 1832 |
|
---|
| 1833 |
|
---|
| 1834 | /* Process HandShake input */
|
---|
| 1835 | static int DoHandShake(const byte* input, int* sslBytes,
|
---|
| 1836 | SnifferSession* session, char* error)
|
---|
| 1837 | {
|
---|
| 1838 | byte type;
|
---|
| 1839 | int size;
|
---|
| 1840 | int ret = 0;
|
---|
| 1841 | int startBytes;
|
---|
| 1842 |
|
---|
| 1843 | if (*sslBytes < HANDSHAKE_HEADER_SZ) {
|
---|
| 1844 | SetError(HANDSHAKE_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1845 | return -1;
|
---|
| 1846 | }
|
---|
| 1847 | type = input[0];
|
---|
| 1848 | size = (input[1] << 16) | (input[2] << 8) | input[3];
|
---|
| 1849 |
|
---|
| 1850 | input += HANDSHAKE_HEADER_SZ;
|
---|
| 1851 | *sslBytes -= HANDSHAKE_HEADER_SZ;
|
---|
| 1852 | startBytes = *sslBytes;
|
---|
| 1853 |
|
---|
| 1854 | if (*sslBytes < size) {
|
---|
| 1855 | SetError(HANDSHAKE_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1856 | return -1;
|
---|
| 1857 | }
|
---|
| 1858 |
|
---|
| 1859 | /* A session's arrays are released when the handshake is completed. */
|
---|
| 1860 | if (session->sslServer->arrays == NULL &&
|
---|
| 1861 | session->sslClient->arrays == NULL) {
|
---|
| 1862 |
|
---|
| 1863 | SetError(NO_SECURE_RENEGOTIATION, error, session, FATAL_ERROR_STATE);
|
---|
| 1864 | return -1;
|
---|
| 1865 | }
|
---|
| 1866 |
|
---|
| 1867 | switch (type) {
|
---|
| 1868 | case hello_verify_request:
|
---|
| 1869 | Trace(GOT_HELLO_VERIFY_STR);
|
---|
| 1870 | break;
|
---|
| 1871 | case hello_request:
|
---|
| 1872 | Trace(GOT_HELLO_REQUEST_STR);
|
---|
| 1873 | break;
|
---|
| 1874 | case session_ticket:
|
---|
| 1875 | Trace(GOT_SESSION_TICKET_STR);
|
---|
| 1876 | ret = ProcessSessionTicket(input, sslBytes, session, error);
|
---|
| 1877 | break;
|
---|
| 1878 | case server_hello:
|
---|
| 1879 | Trace(GOT_SERVER_HELLO_STR);
|
---|
| 1880 | ret = ProcessServerHello(input, sslBytes, session, error);
|
---|
| 1881 | break;
|
---|
| 1882 | case certificate_request:
|
---|
| 1883 | Trace(GOT_CERT_REQ_STR);
|
---|
| 1884 | break;
|
---|
| 1885 | case server_key_exchange:
|
---|
| 1886 | Trace(GOT_SERVER_KEY_EX_STR);
|
---|
| 1887 | /* can't know temp key passively */
|
---|
| 1888 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 1889 | ret = -1;
|
---|
| 1890 | break;
|
---|
| 1891 | case certificate:
|
---|
| 1892 | Trace(GOT_CERT_STR);
|
---|
| 1893 | break;
|
---|
| 1894 | case server_hello_done:
|
---|
| 1895 | Trace(GOT_SERVER_HELLO_DONE_STR);
|
---|
| 1896 | break;
|
---|
| 1897 | case finished:
|
---|
| 1898 | Trace(GOT_FINISHED_STR);
|
---|
| 1899 | ret = ProcessFinished(input, size, sslBytes, session, error);
|
---|
| 1900 | break;
|
---|
| 1901 | case client_hello:
|
---|
| 1902 | Trace(GOT_CLIENT_HELLO_STR);
|
---|
| 1903 | ret = ProcessClientHello(input, sslBytes, session, error);
|
---|
| 1904 | break;
|
---|
| 1905 | case client_key_exchange:
|
---|
| 1906 | Trace(GOT_CLIENT_KEY_EX_STR);
|
---|
| 1907 | ret = ProcessClientKeyExchange(input, sslBytes, session, error);
|
---|
| 1908 | break;
|
---|
| 1909 | case certificate_verify:
|
---|
| 1910 | Trace(GOT_CERT_VER_STR);
|
---|
| 1911 | break;
|
---|
| 1912 | case certificate_status:
|
---|
| 1913 | Trace(GOT_CERT_STATUS_STR);
|
---|
| 1914 | break;
|
---|
| 1915 | default:
|
---|
| 1916 | SetError(GOT_UNKNOWN_HANDSHAKE_STR, error, session, 0);
|
---|
| 1917 | return -1;
|
---|
| 1918 | }
|
---|
| 1919 |
|
---|
| 1920 | *sslBytes = startBytes - size; /* actual bytes of full process */
|
---|
| 1921 |
|
---|
| 1922 | return ret;
|
---|
| 1923 | }
|
---|
| 1924 |
|
---|
| 1925 |
|
---|
| 1926 | /* Decrypt input into plain output, 0 on success */
|
---|
| 1927 | static int Decrypt(SSL* ssl, byte* output, const byte* input, word32 sz)
|
---|
| 1928 | {
|
---|
| 1929 | int ret = 0;
|
---|
| 1930 |
|
---|
| 1931 | switch (ssl->specs.bulk_cipher_algorithm) {
|
---|
| 1932 | #ifdef BUILD_ARC4
|
---|
| 1933 | case wolfssl_rc4:
|
---|
| 1934 | wc_Arc4Process(ssl->decrypt.arc4, output, input, sz);
|
---|
| 1935 | break;
|
---|
| 1936 | #endif
|
---|
| 1937 |
|
---|
| 1938 | #ifdef BUILD_DES3
|
---|
| 1939 | case wolfssl_triple_des:
|
---|
| 1940 | ret = wc_Des3_CbcDecrypt(ssl->decrypt.des3, output, input, sz);
|
---|
| 1941 | break;
|
---|
| 1942 | #endif
|
---|
| 1943 |
|
---|
| 1944 | #ifdef BUILD_AES
|
---|
| 1945 | case wolfssl_aes:
|
---|
| 1946 | ret = wc_AesCbcDecrypt(ssl->decrypt.aes, output, input, sz);
|
---|
| 1947 | break;
|
---|
| 1948 | #endif
|
---|
| 1949 |
|
---|
| 1950 | #ifdef HAVE_HC128
|
---|
| 1951 | case wolfssl_hc128:
|
---|
| 1952 | wc_Hc128_Process(ssl->decrypt.hc128, output, input, sz);
|
---|
| 1953 | break;
|
---|
| 1954 | #endif
|
---|
| 1955 |
|
---|
| 1956 | #ifdef BUILD_RABBIT
|
---|
| 1957 | case wolfssl_rabbit:
|
---|
| 1958 | wc_RabbitProcess(ssl->decrypt.rabbit, output, input, sz);
|
---|
| 1959 | break;
|
---|
| 1960 | #endif
|
---|
| 1961 |
|
---|
| 1962 | #ifdef HAVE_CAMELLIA
|
---|
| 1963 | case wolfssl_camellia:
|
---|
| 1964 | wc_CamelliaCbcDecrypt(ssl->decrypt.cam, output, input, sz);
|
---|
| 1965 | break;
|
---|
| 1966 | #endif
|
---|
| 1967 |
|
---|
| 1968 | #ifdef HAVE_IDEA
|
---|
| 1969 | case wolfssl_idea:
|
---|
| 1970 | wc_IdeaCbcDecrypt(ssl->decrypt.idea, output, input, sz);
|
---|
| 1971 | break;
|
---|
| 1972 | #endif
|
---|
| 1973 |
|
---|
| 1974 | #ifdef HAVE_AESGCM
|
---|
| 1975 | case wolfssl_aes_gcm:
|
---|
| 1976 | if (sz >= (word32)(AEAD_EXP_IV_SZ + ssl->specs.aead_mac_size))
|
---|
| 1977 | {
|
---|
| 1978 | byte nonce[AEAD_NONCE_SZ];
|
---|
| 1979 | XMEMCPY(nonce, ssl->keys.aead_dec_imp_IV, AEAD_IMP_IV_SZ);
|
---|
| 1980 | XMEMCPY(nonce + AEAD_IMP_IV_SZ, input, AEAD_EXP_IV_SZ);
|
---|
| 1981 |
|
---|
| 1982 | if (wc_AesGcmEncrypt(ssl->decrypt.aes,
|
---|
| 1983 | output,
|
---|
| 1984 | input + AEAD_EXP_IV_SZ,
|
---|
| 1985 | sz - AEAD_EXP_IV_SZ - ssl->specs.aead_mac_size,
|
---|
| 1986 | nonce, AEAD_NONCE_SZ,
|
---|
| 1987 | NULL, 0,
|
---|
| 1988 | NULL, 0) < 0) {
|
---|
| 1989 | Trace(BAD_DECRYPT);
|
---|
| 1990 | ret = -1;
|
---|
| 1991 | }
|
---|
| 1992 | ForceZero(nonce, AEAD_NONCE_SZ);
|
---|
| 1993 | }
|
---|
| 1994 | else {
|
---|
| 1995 | Trace(BAD_DECRYPT_SIZE);
|
---|
| 1996 | ret = -1;
|
---|
| 1997 | }
|
---|
| 1998 | break;
|
---|
| 1999 | #endif
|
---|
| 2000 |
|
---|
| 2001 | default:
|
---|
| 2002 | Trace(BAD_DECRYPT_TYPE);
|
---|
| 2003 | ret = -1;
|
---|
| 2004 | break;
|
---|
| 2005 | }
|
---|
| 2006 |
|
---|
| 2007 | return ret;
|
---|
| 2008 | }
|
---|
| 2009 |
|
---|
| 2010 |
|
---|
| 2011 | /* Decrypt input message into output, adjust output steam if needed */
|
---|
| 2012 | static const byte* DecryptMessage(SSL* ssl, const byte* input, word32 sz,
|
---|
| 2013 | byte* output, int* error, int* advance)
|
---|
| 2014 | {
|
---|
| 2015 | int ivExtra = 0;
|
---|
| 2016 |
|
---|
| 2017 | int ret = Decrypt(ssl, output, input, sz);
|
---|
| 2018 | if (ret != 0) {
|
---|
| 2019 | *error = ret;
|
---|
| 2020 | return NULL;
|
---|
| 2021 | }
|
---|
| 2022 | ssl->keys.encryptSz = sz;
|
---|
| 2023 | if (ssl->options.tls1_1 && ssl->specs.cipher_type == block) {
|
---|
| 2024 | output += ssl->specs.block_size; /* go past TLSv1.1 IV */
|
---|
| 2025 | ivExtra = ssl->specs.block_size;
|
---|
| 2026 | *advance = ssl->specs.block_size;
|
---|
| 2027 | }
|
---|
| 2028 |
|
---|
| 2029 | if (ssl->specs.cipher_type == aead) {
|
---|
| 2030 | *advance = ssl->specs.aead_mac_size;
|
---|
| 2031 | ssl->keys.padSz = ssl->specs.aead_mac_size;
|
---|
| 2032 | }
|
---|
| 2033 | else
|
---|
| 2034 | ssl->keys.padSz = ssl->specs.hash_size;
|
---|
| 2035 |
|
---|
| 2036 | if (ssl->specs.cipher_type == block)
|
---|
| 2037 | ssl->keys.padSz += *(output + sz - ivExtra - 1) + 1;
|
---|
| 2038 |
|
---|
| 2039 | return output;
|
---|
| 2040 | }
|
---|
| 2041 |
|
---|
| 2042 |
|
---|
| 2043 | /* remove session from table, use rowHint if no info (means we have a lock) */
|
---|
| 2044 | static void RemoveSession(SnifferSession* session, IpInfo* ipInfo,
|
---|
| 2045 | TcpInfo* tcpInfo, word32 rowHint)
|
---|
| 2046 | {
|
---|
| 2047 | SnifferSession* previous = 0;
|
---|
| 2048 | SnifferSession* current;
|
---|
| 2049 | word32 row = rowHint;
|
---|
| 2050 | int haveLock = 0;
|
---|
| 2051 |
|
---|
| 2052 | if (ipInfo && tcpInfo)
|
---|
| 2053 | row = SessionHash(ipInfo, tcpInfo);
|
---|
| 2054 | else
|
---|
| 2055 | haveLock = 1;
|
---|
| 2056 |
|
---|
| 2057 | assert(row <= HASH_SIZE);
|
---|
| 2058 | Trace(REMOVE_SESSION_STR);
|
---|
| 2059 |
|
---|
| 2060 | if (!haveLock)
|
---|
| 2061 | LockMutex(&SessionMutex);
|
---|
| 2062 |
|
---|
| 2063 | current = SessionTable[row];
|
---|
| 2064 |
|
---|
| 2065 | while (current) {
|
---|
| 2066 | if (current == session) {
|
---|
| 2067 | if (previous)
|
---|
| 2068 | previous->next = current->next;
|
---|
| 2069 | else
|
---|
| 2070 | SessionTable[row] = current->next;
|
---|
| 2071 | FreeSnifferSession(session);
|
---|
| 2072 | TraceRemovedSession();
|
---|
| 2073 | break;
|
---|
| 2074 | }
|
---|
| 2075 | previous = current;
|
---|
| 2076 | current = current->next;
|
---|
| 2077 | }
|
---|
| 2078 |
|
---|
| 2079 | if (!haveLock)
|
---|
| 2080 | UnLockMutex(&SessionMutex);
|
---|
| 2081 | }
|
---|
| 2082 |
|
---|
| 2083 |
|
---|
| 2084 | /* Remove stale sessions from the Session Table, have a lock */
|
---|
| 2085 | static void RemoveStaleSessions(void)
|
---|
| 2086 | {
|
---|
| 2087 | word32 i;
|
---|
| 2088 | SnifferSession* session;
|
---|
| 2089 |
|
---|
| 2090 | for (i = 0; i < HASH_SIZE; i++) {
|
---|
| 2091 | session = SessionTable[i];
|
---|
| 2092 | while (session) {
|
---|
| 2093 | SnifferSession* next = session->next;
|
---|
| 2094 | if (time(NULL) >= session->lastUsed + WOLFSSL_SNIFFER_TIMEOUT) {
|
---|
| 2095 | TraceStaleSession();
|
---|
| 2096 | RemoveSession(session, NULL, NULL, i);
|
---|
| 2097 | }
|
---|
| 2098 | session = next;
|
---|
| 2099 | }
|
---|
| 2100 | }
|
---|
| 2101 | }
|
---|
| 2102 |
|
---|
| 2103 |
|
---|
| 2104 | /* Create a new Sniffer Session */
|
---|
| 2105 | static SnifferSession* CreateSession(IpInfo* ipInfo, TcpInfo* tcpInfo,
|
---|
| 2106 | char* error)
|
---|
| 2107 | {
|
---|
| 2108 | SnifferSession* session = 0;
|
---|
| 2109 | int row;
|
---|
| 2110 |
|
---|
| 2111 | Trace(NEW_SESSION_STR);
|
---|
| 2112 | /* create a new one */
|
---|
| 2113 | session = (SnifferSession*)malloc(sizeof(SnifferSession));
|
---|
| 2114 | if (session == NULL) {
|
---|
| 2115 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
| 2116 | return 0;
|
---|
| 2117 | }
|
---|
| 2118 | InitSession(session);
|
---|
| 2119 | session->server = ipInfo->dst;
|
---|
| 2120 | session->client = ipInfo->src;
|
---|
| 2121 | session->srvPort = (word16)tcpInfo->dstPort;
|
---|
| 2122 | session->cliPort = (word16)tcpInfo->srcPort;
|
---|
| 2123 | session->cliSeqStart = tcpInfo->sequence;
|
---|
| 2124 | session->cliExpected = 1; /* relative */
|
---|
| 2125 | session->lastUsed= time(NULL);
|
---|
| 2126 |
|
---|
| 2127 | session->context = GetSnifferServer(ipInfo, tcpInfo);
|
---|
| 2128 | if (session->context == NULL) {
|
---|
| 2129 | SetError(SERVER_NOT_REG_STR, error, NULL, 0);
|
---|
| 2130 | free(session);
|
---|
| 2131 | return 0;
|
---|
| 2132 | }
|
---|
| 2133 |
|
---|
| 2134 | session->sslServer = SSL_new(session->context->ctx);
|
---|
| 2135 | if (session->sslServer == NULL) {
|
---|
| 2136 | SetError(BAD_NEW_SSL_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2137 | free(session);
|
---|
| 2138 | return 0;
|
---|
| 2139 | }
|
---|
| 2140 | session->sslClient = SSL_new(session->context->ctx);
|
---|
| 2141 | if (session->sslClient == NULL) {
|
---|
| 2142 | SSL_free(session->sslServer);
|
---|
| 2143 | session->sslServer = 0;
|
---|
| 2144 |
|
---|
| 2145 | SetError(BAD_NEW_SSL_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2146 | free(session);
|
---|
| 2147 | return 0;
|
---|
| 2148 | }
|
---|
| 2149 | /* put server back into server mode */
|
---|
| 2150 | session->sslServer->options.side = WOLFSSL_SERVER_END;
|
---|
| 2151 |
|
---|
| 2152 | row = SessionHash(ipInfo, tcpInfo);
|
---|
| 2153 |
|
---|
| 2154 | /* add it to the session table */
|
---|
| 2155 | LockMutex(&SessionMutex);
|
---|
| 2156 |
|
---|
| 2157 | session->next = SessionTable[row];
|
---|
| 2158 | SessionTable[row] = session;
|
---|
| 2159 |
|
---|
| 2160 | SessionCount++;
|
---|
| 2161 |
|
---|
| 2162 | if ( (SessionCount % HASH_SIZE) == 0) {
|
---|
| 2163 | TraceFindingStale();
|
---|
| 2164 | RemoveStaleSessions();
|
---|
| 2165 | }
|
---|
| 2166 |
|
---|
| 2167 | UnLockMutex(&SessionMutex);
|
---|
| 2168 |
|
---|
| 2169 | /* determine headed side */
|
---|
| 2170 | if (ipInfo->dst == session->context->server &&
|
---|
| 2171 | tcpInfo->dstPort == session->context->port)
|
---|
| 2172 | session->flags.side = WOLFSSL_SERVER_END;
|
---|
| 2173 | else
|
---|
| 2174 | session->flags.side = WOLFSSL_CLIENT_END;
|
---|
| 2175 |
|
---|
| 2176 | return session;
|
---|
| 2177 | }
|
---|
| 2178 |
|
---|
| 2179 |
|
---|
| 2180 | #ifdef OLD_HELLO_ALLOWED
|
---|
| 2181 |
|
---|
| 2182 | /* Process Old Client Hello Input */
|
---|
| 2183 | static int DoOldHello(SnifferSession* session, const byte* sslFrame,
|
---|
| 2184 | int* rhSize, int* sslBytes, char* error)
|
---|
| 2185 | {
|
---|
| 2186 | const byte* input = sslFrame;
|
---|
| 2187 | byte b0, b1;
|
---|
| 2188 | word32 idx = 0;
|
---|
| 2189 | int ret;
|
---|
| 2190 |
|
---|
| 2191 | Trace(GOT_OLD_CLIENT_HELLO_STR);
|
---|
| 2192 | session->flags.clientHello = 1; /* don't process again */
|
---|
| 2193 | b0 = *input++;
|
---|
| 2194 | b1 = *input++;
|
---|
| 2195 | *sslBytes -= 2;
|
---|
| 2196 | *rhSize = ((b0 & 0x7f) << 8) | b1;
|
---|
| 2197 |
|
---|
| 2198 | if (*rhSize > *sslBytes) {
|
---|
| 2199 | SetError(OLD_CLIENT_INPUT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2200 | return -1;
|
---|
| 2201 | }
|
---|
| 2202 |
|
---|
| 2203 | ret = ProcessOldClientHello(session->sslServer, input, &idx, *sslBytes,
|
---|
| 2204 | (word16)*rhSize);
|
---|
| 2205 | if (ret < 0 && ret != MATCH_SUITE_ERROR) {
|
---|
| 2206 | SetError(BAD_OLD_CLIENT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2207 | return -1;
|
---|
| 2208 | }
|
---|
| 2209 |
|
---|
| 2210 | Trace(OLD_CLIENT_OK_STR);
|
---|
| 2211 | XMEMCPY(session->sslClient->arrays->clientRandom,
|
---|
| 2212 | session->sslServer->arrays->clientRandom, RAN_LEN);
|
---|
| 2213 |
|
---|
| 2214 | *sslBytes -= *rhSize;
|
---|
| 2215 | return 0;
|
---|
| 2216 | }
|
---|
| 2217 |
|
---|
| 2218 | #endif /* OLD_HELLO_ALLOWED */
|
---|
| 2219 |
|
---|
| 2220 |
|
---|
| 2221 | #if 0
|
---|
| 2222 | /* Calculate the TCP checksum, see RFC 1071 */
|
---|
| 2223 | /* return 0 for success, -1 on error */
|
---|
| 2224 | /* can be called from decode() with
|
---|
| 2225 | TcpChecksum(&ipInfo, &tcpInfo, sslBytes, packet + ipInfo.length);
|
---|
| 2226 | could also add a 64bit version if type available and using this
|
---|
| 2227 | */
|
---|
| 2228 | int TcpChecksum(IpInfo* ipInfo, TcpInfo* tcpInfo, int dataLen,
|
---|
| 2229 | const byte* packet)
|
---|
| 2230 | {
|
---|
| 2231 | TcpPseudoHdr pseudo;
|
---|
| 2232 | int count = PSEUDO_HDR_SZ;
|
---|
| 2233 | const word16* data = (word16*)&pseudo;
|
---|
| 2234 | word32 sum = 0;
|
---|
| 2235 | word16 checksum;
|
---|
| 2236 |
|
---|
| 2237 | pseudo.src = ipInfo->src;
|
---|
| 2238 | pseudo.dst = ipInfo->dst;
|
---|
| 2239 | pseudo.rsv = 0;
|
---|
| 2240 | pseudo.protocol = TCP_PROTO;
|
---|
| 2241 | pseudo.legnth = htons(tcpInfo->length + dataLen);
|
---|
| 2242 |
|
---|
| 2243 | /* pseudo header sum */
|
---|
| 2244 | while (count >= 2) {
|
---|
| 2245 | sum += *data++;
|
---|
| 2246 | count -= 2;
|
---|
| 2247 | }
|
---|
| 2248 |
|
---|
| 2249 | count = tcpInfo->length + dataLen;
|
---|
| 2250 | data = (word16*)packet;
|
---|
| 2251 |
|
---|
| 2252 | /* main sum */
|
---|
| 2253 | while (count > 1) {
|
---|
| 2254 | sum += *data++;
|
---|
| 2255 | count -=2;
|
---|
| 2256 | }
|
---|
| 2257 |
|
---|
| 2258 | /* get left-over, if any */
|
---|
| 2259 | packet = (byte*)data;
|
---|
| 2260 | if (count > 0) {
|
---|
| 2261 | sum += *packet;
|
---|
| 2262 | }
|
---|
| 2263 |
|
---|
| 2264 | /* fold 32bit sum into 16 bits */
|
---|
| 2265 | while (sum >> 16)
|
---|
| 2266 | sum = (sum & 0xffff) + (sum >> 16);
|
---|
| 2267 |
|
---|
| 2268 | checksum = (word16)~sum;
|
---|
| 2269 | /* checksum should now equal 0, since included already calcd checksum */
|
---|
| 2270 | /* field, but tcp checksum offloading could negate calculation */
|
---|
| 2271 | if (checksum == 0)
|
---|
| 2272 | return 0;
|
---|
| 2273 | return -1;
|
---|
| 2274 | }
|
---|
| 2275 | #endif
|
---|
| 2276 |
|
---|
| 2277 |
|
---|
| 2278 | /* Check IP and TCP headers, set payload */
|
---|
| 2279 | /* returns 0 on success, -1 on error */
|
---|
| 2280 | static int CheckHeaders(IpInfo* ipInfo, TcpInfo* tcpInfo, const byte* packet,
|
---|
| 2281 | int length, const byte** sslFrame, int* sslBytes, char* error)
|
---|
| 2282 | {
|
---|
| 2283 | TraceHeader();
|
---|
| 2284 | TracePacket();
|
---|
| 2285 |
|
---|
| 2286 | /* ip header */
|
---|
| 2287 | if (length < IP_HDR_SZ) {
|
---|
| 2288 | SetError(PACKET_HDR_SHORT_STR, error, NULL, 0);
|
---|
| 2289 | return -1;
|
---|
| 2290 | }
|
---|
| 2291 | if (CheckIpHdr((IpHdr*)packet, ipInfo, length, error) != 0)
|
---|
| 2292 | return -1;
|
---|
| 2293 |
|
---|
| 2294 | /* tcp header */
|
---|
| 2295 | if (length < (ipInfo->length + TCP_HDR_SZ)) {
|
---|
| 2296 | SetError(PACKET_HDR_SHORT_STR, error, NULL, 0);
|
---|
| 2297 | return -1;
|
---|
| 2298 | }
|
---|
| 2299 | if (CheckTcpHdr((TcpHdr*)(packet + ipInfo->length), tcpInfo, error) != 0)
|
---|
| 2300 | return -1;
|
---|
| 2301 |
|
---|
| 2302 | /* setup */
|
---|
| 2303 | *sslFrame = packet + ipInfo->length + tcpInfo->length;
|
---|
| 2304 | if (*sslFrame > packet + length) {
|
---|
| 2305 | SetError(PACKET_HDR_SHORT_STR, error, NULL, 0);
|
---|
| 2306 | return -1;
|
---|
| 2307 | }
|
---|
| 2308 | *sslBytes = (int)(packet + length - *sslFrame);
|
---|
| 2309 |
|
---|
| 2310 | return 0;
|
---|
| 2311 | }
|
---|
| 2312 |
|
---|
| 2313 |
|
---|
| 2314 | /* Create or Find existing session */
|
---|
| 2315 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */
|
---|
| 2316 | static int CheckSession(IpInfo* ipInfo, TcpInfo* tcpInfo, int sslBytes,
|
---|
| 2317 | SnifferSession** session, char* error)
|
---|
| 2318 | {
|
---|
| 2319 | /* create a new SnifferSession on client SYN */
|
---|
| 2320 | if (tcpInfo->syn && !tcpInfo->ack) {
|
---|
| 2321 | TraceClientSyn(tcpInfo->sequence);
|
---|
| 2322 | *session = CreateSession(ipInfo, tcpInfo, error);
|
---|
| 2323 | if (*session == NULL) {
|
---|
| 2324 | *session = GetSnifferSession(ipInfo, tcpInfo);
|
---|
| 2325 | /* already had exisiting, so OK */
|
---|
| 2326 | if (*session)
|
---|
| 2327 | return 1;
|
---|
| 2328 |
|
---|
| 2329 | SetError(MEMORY_STR, error, NULL, 0);
|
---|
| 2330 | return -1;
|
---|
| 2331 | }
|
---|
| 2332 | return 1;
|
---|
| 2333 | }
|
---|
| 2334 | /* get existing sniffer session */
|
---|
| 2335 | else {
|
---|
| 2336 | *session = GetSnifferSession(ipInfo, tcpInfo);
|
---|
| 2337 | if (*session == NULL) {
|
---|
| 2338 | /* don't worry about extraneous RST or duplicate FINs */
|
---|
| 2339 | if (tcpInfo->fin || tcpInfo->rst)
|
---|
| 2340 | return 1;
|
---|
| 2341 | /* don't worry about duplicate ACKs either */
|
---|
| 2342 | if (sslBytes == 0 && tcpInfo->ack)
|
---|
| 2343 | return 1;
|
---|
| 2344 |
|
---|
| 2345 | SetError(BAD_SESSION_STR, error, NULL, 0);
|
---|
| 2346 | return -1;
|
---|
| 2347 | }
|
---|
| 2348 | }
|
---|
| 2349 | return 0;
|
---|
| 2350 | }
|
---|
| 2351 |
|
---|
| 2352 |
|
---|
| 2353 | /* Create a Packet Buffer from *begin - end, adjust new *begin and bytesLeft */
|
---|
| 2354 | static PacketBuffer* CreateBuffer(word32* begin, word32 end, const byte* data,
|
---|
| 2355 | int* bytesLeft)
|
---|
| 2356 | {
|
---|
| 2357 | PacketBuffer* pb;
|
---|
| 2358 |
|
---|
| 2359 | int added = end - *begin + 1;
|
---|
| 2360 | assert(*begin <= end);
|
---|
| 2361 |
|
---|
| 2362 | pb = (PacketBuffer*)malloc(sizeof(PacketBuffer));
|
---|
| 2363 | if (pb == NULL) return NULL;
|
---|
| 2364 |
|
---|
| 2365 | pb->next = 0;
|
---|
| 2366 | pb->begin = *begin;
|
---|
| 2367 | pb->end = end;
|
---|
| 2368 | pb->data = (byte*)malloc(added);
|
---|
| 2369 |
|
---|
| 2370 | if (pb->data == NULL) {
|
---|
| 2371 | free(pb);
|
---|
| 2372 | return NULL;
|
---|
| 2373 | }
|
---|
| 2374 | XMEMCPY(pb->data, data, added);
|
---|
| 2375 |
|
---|
| 2376 | *bytesLeft -= added;
|
---|
| 2377 | *begin = pb->end + 1;
|
---|
| 2378 |
|
---|
| 2379 | return pb;
|
---|
| 2380 | }
|
---|
| 2381 |
|
---|
| 2382 |
|
---|
| 2383 | /* Add sslFrame to Reassembly List */
|
---|
| 2384 | /* returns 1 (end) on success, -1, on error */
|
---|
| 2385 | static int AddToReassembly(byte from, word32 seq, const byte* sslFrame,
|
---|
| 2386 | int sslBytes, SnifferSession* session, char* error)
|
---|
| 2387 | {
|
---|
| 2388 | PacketBuffer* add;
|
---|
| 2389 | PacketBuffer** front = (from == WOLFSSL_SERVER_END) ?
|
---|
| 2390 | &session->cliReassemblyList: &session->srvReassemblyList;
|
---|
| 2391 | PacketBuffer* curr = *front;
|
---|
| 2392 | PacketBuffer* prev = curr;
|
---|
| 2393 |
|
---|
| 2394 | word32* reassemblyMemory = (from == WOLFSSL_SERVER_END) ?
|
---|
| 2395 | &session->cliReassemblyMemory : &session->srvReassemblyMemory;
|
---|
| 2396 | word32 startSeq = seq;
|
---|
| 2397 | word32 added;
|
---|
| 2398 | int bytesLeft = sslBytes; /* could be overlapping fragment */
|
---|
| 2399 |
|
---|
| 2400 | /* if list is empty add full frame to front */
|
---|
| 2401 | if (!curr) {
|
---|
| 2402 | if (MaxRecoveryMemory != -1 &&
|
---|
| 2403 | (int)(*reassemblyMemory + sslBytes) > MaxRecoveryMemory) {
|
---|
| 2404 | SetError(REASSEMBLY_MAX_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2405 | return -1;
|
---|
| 2406 | }
|
---|
| 2407 | add = CreateBuffer(&seq, seq + sslBytes - 1, sslFrame, &bytesLeft);
|
---|
| 2408 | if (add == NULL) {
|
---|
| 2409 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2410 | return -1;
|
---|
| 2411 | }
|
---|
| 2412 | *front = add;
|
---|
| 2413 | *reassemblyMemory += sslBytes;
|
---|
| 2414 | return 1;
|
---|
| 2415 | }
|
---|
| 2416 |
|
---|
| 2417 | /* add to front if before current front, up to next->begin */
|
---|
| 2418 | if (seq < curr->begin) {
|
---|
| 2419 | word32 end = seq + sslBytes - 1;
|
---|
| 2420 |
|
---|
| 2421 | if (end >= curr->begin)
|
---|
| 2422 | end = curr->begin - 1;
|
---|
| 2423 |
|
---|
| 2424 | if (MaxRecoveryMemory -1 &&
|
---|
| 2425 | (int)(*reassemblyMemory + sslBytes) > MaxRecoveryMemory) {
|
---|
| 2426 | SetError(REASSEMBLY_MAX_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2427 | return -1;
|
---|
| 2428 | }
|
---|
| 2429 | add = CreateBuffer(&seq, end, sslFrame, &bytesLeft);
|
---|
| 2430 | if (add == NULL) {
|
---|
| 2431 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2432 | return -1;
|
---|
| 2433 | }
|
---|
| 2434 | add->next = curr;
|
---|
| 2435 | *front = add;
|
---|
| 2436 | *reassemblyMemory += sslBytes;
|
---|
| 2437 | }
|
---|
| 2438 |
|
---|
| 2439 | /* while we have bytes left, try to find a gap to fill */
|
---|
| 2440 | while (bytesLeft > 0) {
|
---|
| 2441 | /* get previous packet in list */
|
---|
| 2442 | while (curr && (seq >= curr->begin)) {
|
---|
| 2443 | prev = curr;
|
---|
| 2444 | curr = curr->next;
|
---|
| 2445 | }
|
---|
| 2446 |
|
---|
| 2447 | /* don't add duplicate data */
|
---|
| 2448 | if (prev->end >= seq) {
|
---|
| 2449 | if ( (seq + bytesLeft - 1) <= prev->end)
|
---|
| 2450 | return 1;
|
---|
| 2451 | seq = prev->end + 1;
|
---|
| 2452 | bytesLeft = startSeq + sslBytes - seq;
|
---|
| 2453 | }
|
---|
| 2454 |
|
---|
| 2455 | if (!curr)
|
---|
| 2456 | /* we're at the end */
|
---|
| 2457 | added = bytesLeft;
|
---|
| 2458 | else
|
---|
| 2459 | /* we're in between two frames */
|
---|
| 2460 | added = min((word32)bytesLeft, curr->begin - seq);
|
---|
| 2461 |
|
---|
| 2462 | /* data already there */
|
---|
| 2463 | if (added == 0)
|
---|
| 2464 | continue;
|
---|
| 2465 |
|
---|
| 2466 | if (MaxRecoveryMemory != -1 &&
|
---|
| 2467 | (int)(*reassemblyMemory + added) > MaxRecoveryMemory) {
|
---|
| 2468 | SetError(REASSEMBLY_MAX_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2469 | return -1;
|
---|
| 2470 | }
|
---|
| 2471 | add = CreateBuffer(&seq, seq + added - 1, &sslFrame[seq - startSeq],
|
---|
| 2472 | &bytesLeft);
|
---|
| 2473 | if (add == NULL) {
|
---|
| 2474 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2475 | return -1;
|
---|
| 2476 | }
|
---|
| 2477 | add->next = prev->next;
|
---|
| 2478 | prev->next = add;
|
---|
| 2479 | *reassemblyMemory += added;
|
---|
| 2480 | }
|
---|
| 2481 | return 1;
|
---|
| 2482 | }
|
---|
| 2483 |
|
---|
| 2484 |
|
---|
| 2485 | /* Add out of order FIN capture */
|
---|
| 2486 | /* returns 1 for success (end) */
|
---|
| 2487 | static int AddFinCapture(SnifferSession* session, word32 sequence)
|
---|
| 2488 | {
|
---|
| 2489 | if (session->flags.side == WOLFSSL_SERVER_END) {
|
---|
| 2490 | if (session->finCaputre.cliCounted == 0)
|
---|
| 2491 | session->finCaputre.cliFinSeq = sequence;
|
---|
| 2492 | }
|
---|
| 2493 | else {
|
---|
| 2494 | if (session->finCaputre.srvCounted == 0)
|
---|
| 2495 | session->finCaputre.srvFinSeq = sequence;
|
---|
| 2496 | }
|
---|
| 2497 | return 1;
|
---|
| 2498 | }
|
---|
| 2499 |
|
---|
| 2500 |
|
---|
| 2501 | /* Adjust incoming sequence based on side */
|
---|
| 2502 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */
|
---|
| 2503 | static int AdjustSequence(TcpInfo* tcpInfo, SnifferSession* session,
|
---|
| 2504 | int* sslBytes, const byte** sslFrame, char* error)
|
---|
| 2505 | {
|
---|
| 2506 | word32 seqStart = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2507 | session->cliSeqStart :session->srvSeqStart;
|
---|
| 2508 | word32 real = tcpInfo->sequence - seqStart;
|
---|
| 2509 | word32* expected = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2510 | &session->cliExpected : &session->srvExpected;
|
---|
| 2511 | PacketBuffer* reassemblyList = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2512 | session->cliReassemblyList : session->srvReassemblyList;
|
---|
| 2513 | byte skipPartial = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2514 | session->flags.srvSkipPartial :
|
---|
| 2515 | session->flags.cliSkipPartial;
|
---|
| 2516 |
|
---|
| 2517 | /* handle rollover of sequence */
|
---|
| 2518 | if (tcpInfo->sequence < seqStart)
|
---|
| 2519 | real = 0xffffffffU - seqStart + tcpInfo->sequence;
|
---|
| 2520 |
|
---|
| 2521 | TraceRelativeSequence(*expected, real);
|
---|
| 2522 |
|
---|
| 2523 | if (real < *expected) {
|
---|
| 2524 | Trace(DUPLICATE_STR);
|
---|
| 2525 | if (real + *sslBytes > *expected) {
|
---|
| 2526 | int overlap = *expected - real;
|
---|
| 2527 | Trace(OVERLAP_DUPLICATE_STR);
|
---|
| 2528 |
|
---|
| 2529 | /* adjust to expected, remove duplicate */
|
---|
| 2530 | *sslFrame += overlap;
|
---|
| 2531 | *sslBytes -= overlap;
|
---|
| 2532 |
|
---|
| 2533 | /* The following conditional block is duplicated below. It is the
|
---|
| 2534 | * same action but for a different setup case. If changing this
|
---|
| 2535 | * block be sure to also update the block below. */
|
---|
| 2536 | if (reassemblyList) {
|
---|
| 2537 | word32 newEnd = *expected + *sslBytes;
|
---|
| 2538 |
|
---|
| 2539 | if (newEnd > reassemblyList->begin) {
|
---|
| 2540 | Trace(OVERLAP_REASSEMBLY_BEGIN_STR);
|
---|
| 2541 |
|
---|
| 2542 | /* remove bytes already on reassembly list */
|
---|
| 2543 | *sslBytes -= newEnd - reassemblyList->begin;
|
---|
| 2544 | }
|
---|
| 2545 | if (newEnd > reassemblyList->end) {
|
---|
| 2546 | Trace(OVERLAP_REASSEMBLY_END_STR);
|
---|
| 2547 |
|
---|
| 2548 | /* may be past reassembly list end (could have more on list)
|
---|
| 2549 | so try to add what's past the front->end */
|
---|
| 2550 | AddToReassembly(session->flags.side, reassemblyList->end +1,
|
---|
| 2551 | *sslFrame + reassemblyList->end - *expected + 1,
|
---|
| 2552 | newEnd - reassemblyList->end, session, error);
|
---|
| 2553 | }
|
---|
| 2554 | }
|
---|
| 2555 | }
|
---|
| 2556 | else
|
---|
| 2557 | return 1;
|
---|
| 2558 | }
|
---|
| 2559 | else if (real > *expected) {
|
---|
| 2560 | Trace(OUT_OF_ORDER_STR);
|
---|
| 2561 | if (*sslBytes > 0) {
|
---|
| 2562 | int addResult = AddToReassembly(session->flags.side, real,
|
---|
| 2563 | *sslFrame, *sslBytes, session, error);
|
---|
| 2564 | if (skipPartial) {
|
---|
| 2565 | *sslBytes = 0;
|
---|
| 2566 | return 0;
|
---|
| 2567 | }
|
---|
| 2568 | else
|
---|
| 2569 | return addResult;
|
---|
| 2570 | }
|
---|
| 2571 | else if (tcpInfo->fin)
|
---|
| 2572 | return AddFinCapture(session, real);
|
---|
| 2573 | }
|
---|
| 2574 | else if (*sslBytes > 0) {
|
---|
| 2575 | if (skipPartial) {
|
---|
| 2576 | AddToReassembly(session->flags.side, real,
|
---|
| 2577 | *sslFrame, *sslBytes, session, error);
|
---|
| 2578 | *expected += *sslBytes;
|
---|
| 2579 | *sslBytes = 0;
|
---|
| 2580 | if (tcpInfo->fin)
|
---|
| 2581 | *expected += 1;
|
---|
| 2582 | return 0;
|
---|
| 2583 | }
|
---|
| 2584 | /* The following conditional block is duplicated above. It is the
|
---|
| 2585 | * same action but for a different setup case. If changing this
|
---|
| 2586 | * block be sure to also update the block above. */
|
---|
| 2587 | else if (reassemblyList) {
|
---|
| 2588 | word32 newEnd = *expected + *sslBytes;
|
---|
| 2589 |
|
---|
| 2590 | if (newEnd > reassemblyList->begin) {
|
---|
| 2591 | Trace(OVERLAP_REASSEMBLY_BEGIN_STR);
|
---|
| 2592 |
|
---|
| 2593 | /* remove bytes already on reassembly list */
|
---|
| 2594 | *sslBytes -= newEnd - reassemblyList->begin;
|
---|
| 2595 | }
|
---|
| 2596 | if (newEnd > reassemblyList->end) {
|
---|
| 2597 | Trace(OVERLAP_REASSEMBLY_END_STR);
|
---|
| 2598 |
|
---|
| 2599 | /* may be past reassembly list end (could have more on list)
|
---|
| 2600 | so try to add what's past the front->end */
|
---|
| 2601 | AddToReassembly(session->flags.side, reassemblyList->end +1,
|
---|
| 2602 | *sslFrame + reassemblyList->end - *expected + 1,
|
---|
| 2603 | newEnd - reassemblyList->end, session, error);
|
---|
| 2604 | }
|
---|
| 2605 | }
|
---|
| 2606 | }
|
---|
| 2607 | /* got expected sequence */
|
---|
| 2608 | *expected += *sslBytes;
|
---|
| 2609 | if (tcpInfo->fin)
|
---|
| 2610 | *expected += 1;
|
---|
| 2611 |
|
---|
| 2612 | return 0;
|
---|
| 2613 | }
|
---|
| 2614 |
|
---|
| 2615 |
|
---|
| 2616 | static int FindNextRecordInAssembly(SnifferSession* session,
|
---|
| 2617 | const byte** sslFrame, int* sslBytes,
|
---|
| 2618 | const byte** end, char* error)
|
---|
| 2619 | {
|
---|
| 2620 | PacketBuffer** front = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2621 | &session->cliReassemblyList :
|
---|
| 2622 | &session->srvReassemblyList;
|
---|
| 2623 | PacketBuffer* curr = *front;
|
---|
| 2624 | PacketBuffer* prev = NULL;
|
---|
| 2625 | byte* skipPartial = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2626 | &session->flags.srvSkipPartial :
|
---|
| 2627 | &session->flags.cliSkipPartial;
|
---|
| 2628 | word32* reassemblyMemory = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2629 | &session->cliReassemblyMemory :
|
---|
| 2630 | &session->srvReassemblyMemory;
|
---|
| 2631 | SSL* ssl = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2632 | session->sslServer :
|
---|
| 2633 | session->sslClient;
|
---|
| 2634 | ProtocolVersion pv = ssl->version;
|
---|
| 2635 | word32* expected = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2636 | &session->cliExpected :
|
---|
| 2637 | &session->srvExpected;
|
---|
| 2638 |
|
---|
| 2639 | while (curr != NULL) {
|
---|
| 2640 | *expected = curr->end + 1;
|
---|
| 2641 |
|
---|
| 2642 | if (curr->data[0] == application_data &&
|
---|
| 2643 | curr->data[1] == pv.major &&
|
---|
| 2644 | curr->data[2] == pv.minor) {
|
---|
| 2645 |
|
---|
| 2646 | if (ssl->buffers.inputBuffer.length > 0)
|
---|
| 2647 | Trace(DROPPING_PARTIAL_RECORD);
|
---|
| 2648 |
|
---|
| 2649 | *sslBytes = curr->end - curr->begin + 1;
|
---|
| 2650 | if ( (word32)*sslBytes > ssl->buffers.inputBuffer.bufferSize) {
|
---|
| 2651 | if (GrowInputBuffer(ssl, *sslBytes, 0) < 0) {
|
---|
| 2652 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2653 | return -1;
|
---|
| 2654 | }
|
---|
| 2655 | }
|
---|
| 2656 |
|
---|
| 2657 | XMEMCPY(ssl->buffers.inputBuffer.buffer, curr->data, *sslBytes);
|
---|
| 2658 |
|
---|
| 2659 | *front = curr->next;
|
---|
| 2660 | *reassemblyMemory -= *sslBytes;
|
---|
| 2661 | FreePacketBuffer(curr);
|
---|
| 2662 |
|
---|
| 2663 | ssl->buffers.inputBuffer.length = *sslBytes;
|
---|
| 2664 | *sslFrame = ssl->buffers.inputBuffer.buffer;
|
---|
| 2665 | *end = *sslFrame + *sslBytes;
|
---|
| 2666 | *skipPartial = 0;
|
---|
| 2667 |
|
---|
| 2668 | return 0;
|
---|
| 2669 | }
|
---|
| 2670 | else if (ssl->specs.cipher_type == block) {
|
---|
| 2671 | if (ssl->specs.bulk_cipher_algorithm == wolfssl_aes)
|
---|
| 2672 | wc_AesSetIV(ssl->decrypt.aes,
|
---|
| 2673 | curr->data + curr->end - curr->begin
|
---|
| 2674 | - ssl->specs.block_size + 1);
|
---|
| 2675 | else if (ssl->specs.bulk_cipher_algorithm == wolfssl_triple_des)
|
---|
| 2676 | wc_Des3_SetIV(ssl->decrypt.des3,
|
---|
| 2677 | curr->data + curr->end - curr->begin
|
---|
| 2678 | - ssl->specs.block_size + 1);
|
---|
| 2679 | }
|
---|
| 2680 |
|
---|
| 2681 | Trace(DROPPING_LOST_FRAG_STR);
|
---|
| 2682 | prev = curr;
|
---|
| 2683 | curr = curr->next;
|
---|
| 2684 | *reassemblyMemory -= (prev->end - prev->begin + 1);
|
---|
| 2685 | FreePacketBuffer(prev);
|
---|
| 2686 | }
|
---|
| 2687 |
|
---|
| 2688 | *front = curr;
|
---|
| 2689 |
|
---|
| 2690 | return 0;
|
---|
| 2691 | }
|
---|
| 2692 |
|
---|
| 2693 |
|
---|
| 2694 | static int FixSequence(TcpInfo* tcpInfo, SnifferSession* session)
|
---|
| 2695 | {
|
---|
| 2696 | word32* expected = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2697 | &session->srvExpected : &session->cliExpected;
|
---|
| 2698 | PacketBuffer* list = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2699 | session->srvReassemblyList :
|
---|
| 2700 | session->cliReassemblyList;
|
---|
| 2701 | byte* skipPartial = (session->flags.side != WOLFSSL_SERVER_END) ?
|
---|
| 2702 | &session->flags.srvSkipPartial :
|
---|
| 2703 | &session->flags.cliSkipPartial;
|
---|
| 2704 |
|
---|
| 2705 | *skipPartial = 1;
|
---|
| 2706 | if (list != NULL)
|
---|
| 2707 | *expected = list->begin;
|
---|
| 2708 | else {
|
---|
| 2709 | word32 seqStart = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2710 | session->srvSeqStart : session->cliSeqStart;
|
---|
| 2711 | word32 real = tcpInfo->ackNumber - seqStart;
|
---|
| 2712 |
|
---|
| 2713 | *expected = real;
|
---|
| 2714 | }
|
---|
| 2715 |
|
---|
| 2716 | return 1;
|
---|
| 2717 | }
|
---|
| 2718 |
|
---|
| 2719 |
|
---|
| 2720 | /* Check latest ack number for missing packets
|
---|
| 2721 | return 0 ok, <0 on error */
|
---|
| 2722 | static int CheckAck(TcpInfo* tcpInfo, SnifferSession* session)
|
---|
| 2723 | {
|
---|
| 2724 | if (tcpInfo->ack) {
|
---|
| 2725 | word32 seqStart = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2726 | session->srvSeqStart :session->cliSeqStart;
|
---|
| 2727 | word32 real = tcpInfo->ackNumber - seqStart;
|
---|
| 2728 | word32 expected = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2729 | session->srvExpected : session->cliExpected;
|
---|
| 2730 |
|
---|
| 2731 | /* handle rollover of sequence */
|
---|
| 2732 | if (tcpInfo->ackNumber < seqStart)
|
---|
| 2733 | real = 0xffffffffU - seqStart + tcpInfo->ackNumber;
|
---|
| 2734 |
|
---|
| 2735 | TraceAck(real, expected);
|
---|
| 2736 |
|
---|
| 2737 | if (real > expected)
|
---|
| 2738 | return -1; /* we missed a packet, ACKing data we never saw */
|
---|
| 2739 | }
|
---|
| 2740 | return 0;
|
---|
| 2741 | }
|
---|
| 2742 |
|
---|
| 2743 |
|
---|
| 2744 | /* Check TCP Sequence status */
|
---|
| 2745 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */
|
---|
| 2746 | static int CheckSequence(IpInfo* ipInfo, TcpInfo* tcpInfo,
|
---|
| 2747 | SnifferSession* session, int* sslBytes,
|
---|
| 2748 | const byte** sslFrame, char* error)
|
---|
| 2749 | {
|
---|
| 2750 | int actualLen;
|
---|
| 2751 | byte* ackFault = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2752 | &session->flags.cliAckFault :
|
---|
| 2753 | &session->flags.srvAckFault;
|
---|
| 2754 |
|
---|
| 2755 | /* init SEQ from server to client */
|
---|
| 2756 | if (tcpInfo->syn && tcpInfo->ack) {
|
---|
| 2757 | session->srvSeqStart = tcpInfo->sequence;
|
---|
| 2758 | session->srvExpected = 1;
|
---|
| 2759 | TraceServerSyn(tcpInfo->sequence);
|
---|
| 2760 | return 1;
|
---|
| 2761 | }
|
---|
| 2762 |
|
---|
| 2763 | /* adjust potential ethernet trailer */
|
---|
| 2764 | actualLen = ipInfo->total - ipInfo->length - tcpInfo->length;
|
---|
| 2765 | if (*sslBytes > actualLen) {
|
---|
| 2766 | *sslBytes = actualLen;
|
---|
| 2767 | }
|
---|
| 2768 |
|
---|
| 2769 | TraceSequence(tcpInfo->sequence, *sslBytes);
|
---|
| 2770 | if (CheckAck(tcpInfo, session) < 0) {
|
---|
| 2771 | if (!RecoveryEnabled) {
|
---|
| 2772 | UpdateMissedDataSessions();
|
---|
| 2773 | SetError(ACK_MISSED_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2774 | return -1;
|
---|
| 2775 | }
|
---|
| 2776 | else {
|
---|
| 2777 | SetError(ACK_MISSED_STR, error, session, 0);
|
---|
| 2778 | if (*ackFault == 0) {
|
---|
| 2779 | *ackFault = 1;
|
---|
| 2780 | UpdateMissedDataSessions();
|
---|
| 2781 | }
|
---|
| 2782 | return FixSequence(tcpInfo, session);
|
---|
| 2783 | }
|
---|
| 2784 | }
|
---|
| 2785 |
|
---|
| 2786 | if (*ackFault) {
|
---|
| 2787 | Trace(CLEAR_ACK_FAULT);
|
---|
| 2788 | *ackFault = 0;
|
---|
| 2789 | }
|
---|
| 2790 |
|
---|
| 2791 | return AdjustSequence(tcpInfo, session, sslBytes, sslFrame, error);
|
---|
| 2792 | }
|
---|
| 2793 |
|
---|
| 2794 |
|
---|
| 2795 | /* Check Status before record processing */
|
---|
| 2796 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */
|
---|
| 2797 | static int CheckPreRecord(IpInfo* ipInfo, TcpInfo* tcpInfo,
|
---|
| 2798 | const byte** sslFrame, SnifferSession** session,
|
---|
| 2799 | int* sslBytes, const byte** end, char* error)
|
---|
| 2800 | {
|
---|
| 2801 | word32 length;
|
---|
| 2802 | SSL* ssl = ((*session)->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2803 | (*session)->sslServer : (*session)->sslClient;
|
---|
| 2804 | byte skipPartial = ((*session)->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2805 | (*session)->flags.srvSkipPartial :
|
---|
| 2806 | (*session)->flags.cliSkipPartial;
|
---|
| 2807 | /* remove SnifferSession on 2nd FIN or RST */
|
---|
| 2808 | if (tcpInfo->fin || tcpInfo->rst) {
|
---|
| 2809 | /* flag FIN and RST */
|
---|
| 2810 | if (tcpInfo->fin)
|
---|
| 2811 | (*session)->flags.finCount += 1;
|
---|
| 2812 | else if (tcpInfo->rst)
|
---|
| 2813 | (*session)->flags.finCount += 2;
|
---|
| 2814 |
|
---|
| 2815 | if ((*session)->flags.finCount >= 2) {
|
---|
| 2816 | RemoveSession(*session, ipInfo, tcpInfo, 0);
|
---|
| 2817 | *session = NULL;
|
---|
| 2818 | return 1;
|
---|
| 2819 | }
|
---|
| 2820 | }
|
---|
| 2821 |
|
---|
| 2822 | if ((*session)->flags.fatalError == FATAL_ERROR_STATE) {
|
---|
| 2823 | SetError(FATAL_ERROR_STR, error, NULL, 0);
|
---|
| 2824 | return -1;
|
---|
| 2825 | }
|
---|
| 2826 |
|
---|
| 2827 | if (skipPartial) {
|
---|
| 2828 | if (FindNextRecordInAssembly(*session,
|
---|
| 2829 | sslFrame, sslBytes, end, error) < 0) {
|
---|
| 2830 | return -1;
|
---|
| 2831 | }
|
---|
| 2832 | }
|
---|
| 2833 |
|
---|
| 2834 | if (*sslBytes == 0) {
|
---|
| 2835 | Trace(NO_DATA_STR);
|
---|
| 2836 | return 1;
|
---|
| 2837 | }
|
---|
| 2838 |
|
---|
| 2839 | /* if current partial data, add to end of partial */
|
---|
| 2840 | /* if skipping, the data is alread at the end of partial */
|
---|
| 2841 | if ( !skipPartial &&
|
---|
| 2842 | (length = ssl->buffers.inputBuffer.length) ) {
|
---|
| 2843 | Trace(PARTIAL_ADD_STR);
|
---|
| 2844 |
|
---|
| 2845 | if ( (*sslBytes + length) > ssl->buffers.inputBuffer.bufferSize) {
|
---|
| 2846 | if (GrowInputBuffer(ssl, *sslBytes, length) < 0) {
|
---|
| 2847 | SetError(MEMORY_STR, error, *session, FATAL_ERROR_STATE);
|
---|
| 2848 | return -1;
|
---|
| 2849 | }
|
---|
| 2850 | }
|
---|
| 2851 | XMEMCPY(&ssl->buffers.inputBuffer.buffer[length], *sslFrame, *sslBytes);
|
---|
| 2852 | *sslBytes += length;
|
---|
| 2853 | ssl->buffers.inputBuffer.length = *sslBytes;
|
---|
| 2854 | *sslFrame = ssl->buffers.inputBuffer.buffer;
|
---|
| 2855 | *end = *sslFrame + *sslBytes;
|
---|
| 2856 | }
|
---|
| 2857 |
|
---|
| 2858 | if ((*session)->flags.clientHello == 0 && **sslFrame != handshake) {
|
---|
| 2859 | /* Sanity check the packet for an old style client hello. */
|
---|
| 2860 | int rhSize = (((*sslFrame)[0] & 0x7f) << 8) | ((*sslFrame)[1]);
|
---|
| 2861 |
|
---|
| 2862 | if ((rhSize <= (*sslBytes - 2)) &&
|
---|
| 2863 | (*sslFrame)[2] == OLD_HELLO_ID && (*sslFrame)[3] == SSLv3_MAJOR) {
|
---|
| 2864 | #ifdef OLD_HELLO_ALLOWED
|
---|
| 2865 | int ret = DoOldHello(*session, *sslFrame, &rhSize, sslBytes, error);
|
---|
| 2866 | if (ret < 0)
|
---|
| 2867 | return -1; /* error already set */
|
---|
| 2868 | if (*sslBytes <= 0)
|
---|
| 2869 | return 1;
|
---|
| 2870 | #endif
|
---|
| 2871 | }
|
---|
| 2872 | else {
|
---|
| 2873 | #ifdef STARTTLS_ALLOWED
|
---|
| 2874 | return 1;
|
---|
| 2875 | #endif
|
---|
| 2876 | }
|
---|
| 2877 | }
|
---|
| 2878 |
|
---|
| 2879 | return 0;
|
---|
| 2880 | }
|
---|
| 2881 |
|
---|
| 2882 |
|
---|
| 2883 | /* See if input on the reassembly list is ready for consuming */
|
---|
| 2884 | /* returns 1 for TRUE, 0 for FALSE */
|
---|
| 2885 | static int HaveMoreInput(SnifferSession* session, const byte** sslFrame,
|
---|
| 2886 | int* sslBytes, const byte** end, char* error)
|
---|
| 2887 | {
|
---|
| 2888 | /* sequence and reassembly based on from, not to */
|
---|
| 2889 | int moreInput = 0;
|
---|
| 2890 | PacketBuffer** front = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2891 | &session->cliReassemblyList : &session->srvReassemblyList;
|
---|
| 2892 | word32* expected = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2893 | &session->cliExpected : &session->srvExpected;
|
---|
| 2894 | /* buffer is on receiving end */
|
---|
| 2895 | word32* length = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2896 | &session->sslServer->buffers.inputBuffer.length :
|
---|
| 2897 | &session->sslClient->buffers.inputBuffer.length;
|
---|
| 2898 | byte** myBuffer = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2899 | &session->sslServer->buffers.inputBuffer.buffer :
|
---|
| 2900 | &session->sslClient->buffers.inputBuffer.buffer;
|
---|
| 2901 | word32* bufferSize = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2902 | &session->sslServer->buffers.inputBuffer.bufferSize :
|
---|
| 2903 | &session->sslClient->buffers.inputBuffer.bufferSize;
|
---|
| 2904 | SSL* ssl = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2905 | session->sslServer : session->sslClient;
|
---|
| 2906 | word32* reassemblyMemory = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2907 | &session->cliReassemblyMemory : &session->srvReassemblyMemory;
|
---|
| 2908 |
|
---|
| 2909 | while (*front && ((*front)->begin == *expected) ) {
|
---|
| 2910 | word32 room = *bufferSize - *length;
|
---|
| 2911 | word32 packetLen = (*front)->end - (*front)->begin + 1;
|
---|
| 2912 |
|
---|
| 2913 | if (packetLen > room && *bufferSize < MAX_INPUT_SZ) {
|
---|
| 2914 | if (GrowInputBuffer(ssl, packetLen, *length) < 0) {
|
---|
| 2915 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2916 | return 0;
|
---|
| 2917 | }
|
---|
| 2918 | room = *bufferSize - *length; /* bufferSize is now bigger */
|
---|
| 2919 | }
|
---|
| 2920 |
|
---|
| 2921 | if (packetLen <= room) {
|
---|
| 2922 | PacketBuffer* del = *front;
|
---|
| 2923 | byte* buf = *myBuffer;
|
---|
| 2924 |
|
---|
| 2925 | XMEMCPY(&buf[*length], (*front)->data, packetLen);
|
---|
| 2926 | *length += packetLen;
|
---|
| 2927 | *expected += packetLen;
|
---|
| 2928 |
|
---|
| 2929 | /* remove used packet */
|
---|
| 2930 | *front = (*front)->next;
|
---|
| 2931 |
|
---|
| 2932 | *reassemblyMemory -= packetLen;
|
---|
| 2933 | FreePacketBuffer(del);
|
---|
| 2934 |
|
---|
| 2935 | moreInput = 1;
|
---|
| 2936 | }
|
---|
| 2937 | else
|
---|
| 2938 | break;
|
---|
| 2939 | }
|
---|
| 2940 | if (moreInput) {
|
---|
| 2941 | *sslFrame = *myBuffer;
|
---|
| 2942 | *sslBytes = *length;
|
---|
| 2943 | *end = *myBuffer + *length;
|
---|
| 2944 | }
|
---|
| 2945 | return moreInput;
|
---|
| 2946 | }
|
---|
| 2947 |
|
---|
| 2948 |
|
---|
| 2949 |
|
---|
| 2950 | /* Process Message(s) from sslFrame */
|
---|
| 2951 | /* return Number of bytes on success, 0 for no data yet, and -1 on error */
|
---|
| 2952 | static int ProcessMessage(const byte* sslFrame, SnifferSession* session,
|
---|
| 2953 | int sslBytes, byte** data, const byte* end,
|
---|
| 2954 | char* error)
|
---|
| 2955 | {
|
---|
| 2956 | const byte* sslBegin = sslFrame;
|
---|
| 2957 | const byte* recordEnd; /* end of record indicator */
|
---|
| 2958 | const byte* inRecordEnd; /* indictor from input stream not decrypt */
|
---|
| 2959 | RecordLayerHeader rh;
|
---|
| 2960 | int rhSize = 0;
|
---|
| 2961 | int ret;
|
---|
| 2962 | int errCode = 0;
|
---|
| 2963 | int decoded = 0; /* bytes stored for user in data */
|
---|
| 2964 | int notEnough; /* notEnough bytes yet flag */
|
---|
| 2965 | int decrypted = 0; /* was current msg decrypted */
|
---|
| 2966 | SSL* ssl = (session->flags.side == WOLFSSL_SERVER_END) ?
|
---|
| 2967 | session->sslServer : session->sslClient;
|
---|
| 2968 | doMessage:
|
---|
| 2969 | notEnough = 0;
|
---|
| 2970 | if (sslBytes < 0) {
|
---|
| 2971 | SetError(PACKET_HDR_SHORT_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2972 | return -1;
|
---|
| 2973 | }
|
---|
| 2974 | if (sslBytes >= RECORD_HEADER_SZ) {
|
---|
| 2975 | if (GetRecordHeader(sslFrame, &rh, &rhSize) != 0) {
|
---|
| 2976 | SetError(BAD_RECORD_HDR_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2977 | return -1;
|
---|
| 2978 | }
|
---|
| 2979 | }
|
---|
| 2980 | else
|
---|
| 2981 | notEnough = 1;
|
---|
| 2982 |
|
---|
| 2983 | if (notEnough || rhSize > (sslBytes - RECORD_HEADER_SZ)) {
|
---|
| 2984 | /* don't have enough input yet to process full SSL record */
|
---|
| 2985 | Trace(PARTIAL_INPUT_STR);
|
---|
| 2986 |
|
---|
| 2987 | /* store partial if not there already or we advanced */
|
---|
| 2988 | if (ssl->buffers.inputBuffer.length == 0 || sslBegin != sslFrame) {
|
---|
| 2989 | if (sslBytes > (int)ssl->buffers.inputBuffer.bufferSize) {
|
---|
| 2990 | if (GrowInputBuffer(ssl, sslBytes, 0) < 0) {
|
---|
| 2991 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 2992 | return -1;
|
---|
| 2993 | }
|
---|
| 2994 | }
|
---|
| 2995 | XMEMMOVE(ssl->buffers.inputBuffer.buffer, sslFrame, sslBytes);
|
---|
| 2996 | ssl->buffers.inputBuffer.length = sslBytes;
|
---|
| 2997 | }
|
---|
| 2998 | if (HaveMoreInput(session, &sslFrame, &sslBytes, &end, error))
|
---|
| 2999 | goto doMessage;
|
---|
| 3000 | return decoded;
|
---|
| 3001 | }
|
---|
| 3002 | sslFrame += RECORD_HEADER_SZ;
|
---|
| 3003 | sslBytes -= RECORD_HEADER_SZ;
|
---|
| 3004 | recordEnd = sslFrame + rhSize; /* may have more than one record */
|
---|
| 3005 | inRecordEnd = recordEnd;
|
---|
| 3006 |
|
---|
| 3007 | /* decrypt if needed */
|
---|
| 3008 | if ((session->flags.side == WOLFSSL_SERVER_END &&
|
---|
| 3009 | session->flags.serverCipherOn)
|
---|
| 3010 | || (session->flags.side == WOLFSSL_CLIENT_END &&
|
---|
| 3011 | session->flags.clientCipherOn)) {
|
---|
| 3012 | int ivAdvance = 0; /* TLSv1.1 advance amount */
|
---|
| 3013 | if (ssl->decrypt.setup != 1) {
|
---|
| 3014 | SetError(DECRYPT_KEYS_NOT_SETUP, error, session, FATAL_ERROR_STATE);
|
---|
| 3015 | return -1;
|
---|
| 3016 | }
|
---|
| 3017 | if (CheckAvailableSize(ssl, rhSize) < 0) {
|
---|
| 3018 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 3019 | return -1;
|
---|
| 3020 | }
|
---|
| 3021 | sslFrame = DecryptMessage(ssl, sslFrame, rhSize,
|
---|
| 3022 | ssl->buffers.outputBuffer.buffer, &errCode,
|
---|
| 3023 | &ivAdvance);
|
---|
| 3024 | recordEnd = sslFrame - ivAdvance + rhSize; /* sslFrame moved so
|
---|
| 3025 | should recordEnd */
|
---|
| 3026 | decrypted = 1;
|
---|
| 3027 | if (errCode != 0) {
|
---|
| 3028 | SetError(BAD_DECRYPT, error, session, FATAL_ERROR_STATE);
|
---|
| 3029 | return -1;
|
---|
| 3030 | }
|
---|
| 3031 | }
|
---|
| 3032 |
|
---|
| 3033 | doPart:
|
---|
| 3034 |
|
---|
| 3035 | switch ((enum ContentType)rh.type) {
|
---|
| 3036 | case handshake:
|
---|
| 3037 | {
|
---|
| 3038 | int startIdx = sslBytes;
|
---|
| 3039 | int used;
|
---|
| 3040 |
|
---|
| 3041 | Trace(GOT_HANDSHAKE_STR);
|
---|
| 3042 | ret = DoHandShake(sslFrame, &sslBytes, session, error);
|
---|
| 3043 | if (ret != 0) {
|
---|
| 3044 | if (session->flags.fatalError == 0)
|
---|
| 3045 | SetError(BAD_HANDSHAKE_STR, error, session,
|
---|
| 3046 | FATAL_ERROR_STATE);
|
---|
| 3047 | return -1;
|
---|
| 3048 | }
|
---|
| 3049 |
|
---|
| 3050 | /* DoHandShake now fully decrements sslBytes to remaining */
|
---|
| 3051 | used = startIdx - sslBytes;
|
---|
| 3052 | sslFrame += used;
|
---|
| 3053 | if (decrypted)
|
---|
| 3054 | sslFrame += ssl->keys.padSz;
|
---|
| 3055 | }
|
---|
| 3056 | break;
|
---|
| 3057 | case change_cipher_spec:
|
---|
| 3058 | if (session->flags.side == WOLFSSL_SERVER_END)
|
---|
| 3059 | session->flags.serverCipherOn = 1;
|
---|
| 3060 | else
|
---|
| 3061 | session->flags.clientCipherOn = 1;
|
---|
| 3062 | Trace(GOT_CHANGE_CIPHER_STR);
|
---|
| 3063 | ssl->options.handShakeState = HANDSHAKE_DONE;
|
---|
| 3064 | ssl->options.handShakeDone = 1;
|
---|
| 3065 |
|
---|
| 3066 | sslFrame += 1;
|
---|
| 3067 | sslBytes -= 1;
|
---|
| 3068 |
|
---|
| 3069 | break;
|
---|
| 3070 | case application_data:
|
---|
| 3071 | Trace(GOT_APP_DATA_STR);
|
---|
| 3072 | {
|
---|
| 3073 | word32 inOutIdx = 0;
|
---|
| 3074 |
|
---|
| 3075 | ret = DoApplicationData(ssl, (byte*)sslFrame, &inOutIdx);
|
---|
| 3076 | if (ret == 0) {
|
---|
| 3077 | ret = ssl->buffers.clearOutputBuffer.length;
|
---|
| 3078 | TraceGotData(ret);
|
---|
| 3079 | if (ret) { /* may be blank message */
|
---|
| 3080 | byte* tmpData; /* don't leak on realloc free */
|
---|
| 3081 | /* add an extra byte at end of allocation in case user
|
---|
| 3082 | * wants to null terminate plaintext */
|
---|
| 3083 | tmpData = (byte*)realloc(*data, decoded + ret + 1);
|
---|
| 3084 | if (tmpData == NULL) {
|
---|
| 3085 | free(*data);
|
---|
| 3086 | *data = NULL;
|
---|
| 3087 | SetError(MEMORY_STR, error, session,
|
---|
| 3088 | FATAL_ERROR_STATE);
|
---|
| 3089 | return -1;
|
---|
| 3090 | }
|
---|
| 3091 | *data = tmpData;
|
---|
| 3092 | XMEMCPY(*data + decoded,
|
---|
| 3093 | ssl->buffers.clearOutputBuffer.buffer, ret);
|
---|
| 3094 | TraceAddedData(ret, decoded);
|
---|
| 3095 | decoded += ret;
|
---|
| 3096 | ssl->buffers.clearOutputBuffer.length = 0;
|
---|
| 3097 | }
|
---|
| 3098 | }
|
---|
| 3099 | else {
|
---|
| 3100 | SetError(BAD_APP_DATA_STR, error,session,FATAL_ERROR_STATE);
|
---|
| 3101 | return -1;
|
---|
| 3102 | }
|
---|
| 3103 | if (ssl->buffers.outputBuffer.dynamicFlag)
|
---|
| 3104 | ShrinkOutputBuffer(ssl);
|
---|
| 3105 |
|
---|
| 3106 | sslFrame += inOutIdx;
|
---|
| 3107 | sslBytes -= inOutIdx;
|
---|
| 3108 | }
|
---|
| 3109 | break;
|
---|
| 3110 | case alert:
|
---|
| 3111 | Trace(GOT_ALERT_STR);
|
---|
| 3112 | sslFrame += rhSize;
|
---|
| 3113 | sslBytes -= rhSize;
|
---|
| 3114 | break;
|
---|
| 3115 | case no_type:
|
---|
| 3116 | default:
|
---|
| 3117 | SetError(GOT_UNKNOWN_RECORD_STR, error, session, FATAL_ERROR_STATE);
|
---|
| 3118 | return -1;
|
---|
| 3119 | }
|
---|
| 3120 |
|
---|
| 3121 | /* do we have another msg in record ? */
|
---|
| 3122 | if (sslFrame < recordEnd) {
|
---|
| 3123 | Trace(ANOTHER_MSG_STR);
|
---|
| 3124 | goto doPart;
|
---|
| 3125 | }
|
---|
| 3126 |
|
---|
| 3127 | /* back to input stream instead of potential decrypt buffer */
|
---|
| 3128 | recordEnd = inRecordEnd;
|
---|
| 3129 |
|
---|
| 3130 | /* do we have more records ? */
|
---|
| 3131 | if (recordEnd < end) {
|
---|
| 3132 | Trace(ANOTHER_MSG_STR);
|
---|
| 3133 | sslFrame = recordEnd;
|
---|
| 3134 | sslBytes = (int)(end - recordEnd);
|
---|
| 3135 | goto doMessage;
|
---|
| 3136 | }
|
---|
| 3137 |
|
---|
| 3138 | /* clear used input */
|
---|
| 3139 | ssl->buffers.inputBuffer.length = 0;
|
---|
| 3140 |
|
---|
| 3141 | /* could have more input ready now */
|
---|
| 3142 | if (HaveMoreInput(session, &sslFrame, &sslBytes, &end, error))
|
---|
| 3143 | goto doMessage;
|
---|
| 3144 |
|
---|
| 3145 | if (ssl->buffers.inputBuffer.dynamicFlag)
|
---|
| 3146 | ShrinkInputBuffer(ssl, NO_FORCED_FREE);
|
---|
| 3147 |
|
---|
| 3148 | return decoded;
|
---|
| 3149 | }
|
---|
| 3150 |
|
---|
| 3151 |
|
---|
| 3152 | /* See if we need to process any pending FIN captures */
|
---|
| 3153 | static void CheckFinCapture(IpInfo* ipInfo, TcpInfo* tcpInfo,
|
---|
| 3154 | SnifferSession* session)
|
---|
| 3155 | {
|
---|
| 3156 | if (session->finCaputre.cliFinSeq && session->finCaputre.cliFinSeq <=
|
---|
| 3157 | session->cliExpected) {
|
---|
| 3158 | if (session->finCaputre.cliCounted == 0) {
|
---|
| 3159 | session->flags.finCount += 1;
|
---|
| 3160 | session->finCaputre.cliCounted = 1;
|
---|
| 3161 | TraceClientFin(session->finCaputre.cliFinSeq, session->cliExpected);
|
---|
| 3162 | }
|
---|
| 3163 | }
|
---|
| 3164 |
|
---|
| 3165 | if (session->finCaputre.srvFinSeq && session->finCaputre.srvFinSeq <=
|
---|
| 3166 | session->srvExpected) {
|
---|
| 3167 | if (session->finCaputre.srvCounted == 0) {
|
---|
| 3168 | session->flags.finCount += 1;
|
---|
| 3169 | session->finCaputre.srvCounted = 1;
|
---|
| 3170 | TraceServerFin(session->finCaputre.srvFinSeq, session->srvExpected);
|
---|
| 3171 | }
|
---|
| 3172 | }
|
---|
| 3173 |
|
---|
| 3174 | if (session->flags.finCount >= 2)
|
---|
| 3175 | RemoveSession(session, ipInfo, tcpInfo, 0);
|
---|
| 3176 | }
|
---|
| 3177 |
|
---|
| 3178 |
|
---|
| 3179 | /* If session is in fatal error state free resources now
|
---|
| 3180 | return true if removed, 0 otherwise */
|
---|
| 3181 | static int RemoveFatalSession(IpInfo* ipInfo, TcpInfo* tcpInfo,
|
---|
| 3182 | SnifferSession* session, char* error)
|
---|
| 3183 | {
|
---|
| 3184 | if (session && session->flags.fatalError == FATAL_ERROR_STATE) {
|
---|
| 3185 | RemoveSession(session, ipInfo, tcpInfo, 0);
|
---|
| 3186 | SetError(FATAL_ERROR_STR, error, NULL, 0);
|
---|
| 3187 | return 1;
|
---|
| 3188 | }
|
---|
| 3189 | return 0;
|
---|
| 3190 | }
|
---|
| 3191 |
|
---|
| 3192 |
|
---|
| 3193 | /* Passes in an IP/TCP packet for decoding (ethernet/localhost frame) removed */
|
---|
| 3194 | /* returns Number of bytes on success, 0 for no data yet, and -1 on error */
|
---|
| 3195 | int ssl_DecodePacket(const byte* packet, int length, byte** data, char* error)
|
---|
| 3196 | {
|
---|
| 3197 | TcpInfo tcpInfo;
|
---|
| 3198 | IpInfo ipInfo;
|
---|
| 3199 | const byte* sslFrame;
|
---|
| 3200 | const byte* end = packet + length;
|
---|
| 3201 | int sslBytes; /* ssl bytes unconsumed */
|
---|
| 3202 | int ret;
|
---|
| 3203 | SnifferSession* session = 0;
|
---|
| 3204 |
|
---|
| 3205 | if (CheckHeaders(&ipInfo, &tcpInfo, packet, length, &sslFrame, &sslBytes,
|
---|
| 3206 | error) != 0)
|
---|
| 3207 | return -1;
|
---|
| 3208 |
|
---|
| 3209 | ret = CheckSession(&ipInfo, &tcpInfo, sslBytes, &session, error);
|
---|
| 3210 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1;
|
---|
| 3211 | else if (ret == -1) return -1;
|
---|
| 3212 | else if (ret == 1) return 0; /* done for now */
|
---|
| 3213 |
|
---|
| 3214 | ret = CheckSequence(&ipInfo, &tcpInfo, session, &sslBytes, &sslFrame,error);
|
---|
| 3215 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1;
|
---|
| 3216 | else if (ret == -1) return -1;
|
---|
| 3217 | else if (ret == 1) return 0; /* done for now */
|
---|
| 3218 |
|
---|
| 3219 | ret = CheckPreRecord(&ipInfo, &tcpInfo, &sslFrame, &session, &sslBytes,
|
---|
| 3220 | &end, error);
|
---|
| 3221 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1;
|
---|
| 3222 | else if (ret == -1) return -1;
|
---|
| 3223 | else if (ret == 1) return 0; /* done for now */
|
---|
| 3224 |
|
---|
| 3225 | ret = ProcessMessage(sslFrame, session, sslBytes, data, end, error);
|
---|
| 3226 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1;
|
---|
| 3227 | CheckFinCapture(&ipInfo, &tcpInfo, session);
|
---|
| 3228 | return ret;
|
---|
| 3229 | }
|
---|
| 3230 |
|
---|
| 3231 |
|
---|
| 3232 | /* Deallocator for the decoded data buffer. */
|
---|
| 3233 | /* returns 0 on success, -1 on error */
|
---|
| 3234 | int ssl_FreeDecodeBuffer(byte** data, char* error)
|
---|
| 3235 | {
|
---|
| 3236 | (void)error;
|
---|
| 3237 |
|
---|
| 3238 | if (data != NULL) {
|
---|
| 3239 | free(*data);
|
---|
| 3240 | *data = NULL;
|
---|
| 3241 | }
|
---|
| 3242 |
|
---|
| 3243 | return 0;
|
---|
| 3244 | }
|
---|
| 3245 |
|
---|
| 3246 |
|
---|
| 3247 | /* Enables (if traceFile)/ Disables debug tracing */
|
---|
| 3248 | /* returns 0 on success, -1 on error */
|
---|
| 3249 | int ssl_Trace(const char* traceFile, char* error)
|
---|
| 3250 | {
|
---|
| 3251 | if (traceFile) {
|
---|
| 3252 | TraceFile = fopen(traceFile, "a");
|
---|
| 3253 | if (!TraceFile) {
|
---|
| 3254 | SetError(BAD_TRACE_FILE_STR, error, NULL, 0);
|
---|
| 3255 | return -1;
|
---|
| 3256 | }
|
---|
| 3257 | TraceOn = 1;
|
---|
| 3258 | }
|
---|
| 3259 | else
|
---|
| 3260 | TraceOn = 0;
|
---|
| 3261 |
|
---|
| 3262 | return 0;
|
---|
| 3263 | }
|
---|
| 3264 |
|
---|
| 3265 |
|
---|
| 3266 | /* Enables/Disables Recovery of missed data if later packets allow
|
---|
| 3267 | * maxMemory is number of bytes to use for reassembly buffering per session,
|
---|
| 3268 | * -1 means unlimited
|
---|
| 3269 | * returns 0 on success, -1 on error */
|
---|
| 3270 | int ssl_EnableRecovery(int onOff, int maxMemory, char* error)
|
---|
| 3271 | {
|
---|
| 3272 | (void)error;
|
---|
| 3273 |
|
---|
| 3274 | RecoveryEnabled = onOff;
|
---|
| 3275 | if (onOff)
|
---|
| 3276 | MaxRecoveryMemory = maxMemory;
|
---|
| 3277 |
|
---|
| 3278 | return 0;
|
---|
| 3279 | }
|
---|
| 3280 |
|
---|
| 3281 |
|
---|
| 3282 |
|
---|
| 3283 | int ssl_GetSessionStats(unsigned int* active, unsigned int* total,
|
---|
| 3284 | unsigned int* peak, unsigned int* maxSessions,
|
---|
| 3285 | unsigned int* missedData, unsigned int* reassemblyMem,
|
---|
| 3286 | char* error)
|
---|
| 3287 | {
|
---|
| 3288 | int ret;
|
---|
| 3289 |
|
---|
| 3290 | if (missedData) {
|
---|
| 3291 | LockMutex(&RecoveryMutex);
|
---|
| 3292 | *missedData = MissedDataSessions;
|
---|
| 3293 | UnLockMutex(&RecoveryMutex);
|
---|
| 3294 | }
|
---|
| 3295 |
|
---|
| 3296 | if (reassemblyMem) {
|
---|
| 3297 | SnifferSession* session;
|
---|
| 3298 | int i;
|
---|
| 3299 |
|
---|
| 3300 | *reassemblyMem = 0;
|
---|
| 3301 | LockMutex(&SessionMutex);
|
---|
| 3302 | for (i = 0; i < HASH_SIZE; i++) {
|
---|
| 3303 | session = SessionTable[i];
|
---|
| 3304 | while (session) {
|
---|
| 3305 | *reassemblyMem += session->cliReassemblyMemory;
|
---|
| 3306 | *reassemblyMem += session->srvReassemblyMemory;
|
---|
| 3307 | session = session->next;
|
---|
| 3308 | }
|
---|
| 3309 | }
|
---|
| 3310 | UnLockMutex(&SessionMutex);
|
---|
| 3311 | }
|
---|
| 3312 |
|
---|
| 3313 | ret = wolfSSL_get_session_stats(active, total, peak, maxSessions);
|
---|
| 3314 |
|
---|
| 3315 | if (ret == SSL_SUCCESS)
|
---|
| 3316 | return 0;
|
---|
| 3317 | else {
|
---|
| 3318 | SetError(BAD_SESSION_STATS, error, NULL, 0);
|
---|
| 3319 | return -1;
|
---|
| 3320 | }
|
---|
| 3321 | }
|
---|
| 3322 |
|
---|
| 3323 |
|
---|
| 3324 |
|
---|
| 3325 | #endif /* WOLFSSL_SNIFFER */
|
---|
| 3326 | #endif /* WOLFCRYPT_ONLY */
|
---|