This is a port of cyaSSL 2.7.0.
Dependents: CyaSSL_DTLS_Cellular CyaSSL_DTLS_Ethernet
sniffer.c@0:714293de3836, 2013-09-05 (annotated)
- Committer:
- ashleymills
- Date:
- Thu Sep 05 10:33:04 2013 +0000
- Revision:
- 0:714293de3836
Initial commit
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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ashleymills | 0:714293de3836 | 1 | /* sniffer.c |
ashleymills | 0:714293de3836 | 2 | * |
ashleymills | 0:714293de3836 | 3 | * Copyright (C) 2006-2013 wolfSSL Inc. |
ashleymills | 0:714293de3836 | 4 | * |
ashleymills | 0:714293de3836 | 5 | * This file is part of CyaSSL. |
ashleymills | 0:714293de3836 | 6 | * |
ashleymills | 0:714293de3836 | 7 | * CyaSSL is free software; you can redistribute it and/or modify |
ashleymills | 0:714293de3836 | 8 | * it under the terms of the GNU General Public License as published by |
ashleymills | 0:714293de3836 | 9 | * the Free Software Foundation; either version 2 of the License, or |
ashleymills | 0:714293de3836 | 10 | * (at your option) any later version. |
ashleymills | 0:714293de3836 | 11 | * |
ashleymills | 0:714293de3836 | 12 | * CyaSSL is distributed in the hope that it will be useful, |
ashleymills | 0:714293de3836 | 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
ashleymills | 0:714293de3836 | 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
ashleymills | 0:714293de3836 | 15 | * GNU General Public License for more details. |
ashleymills | 0:714293de3836 | 16 | * |
ashleymills | 0:714293de3836 | 17 | * You should have received a copy of the GNU General Public License |
ashleymills | 0:714293de3836 | 18 | * along with this program; if not, write to the Free Software |
ashleymills | 0:714293de3836 | 19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
ashleymills | 0:714293de3836 | 20 | */ |
ashleymills | 0:714293de3836 | 21 | |
ashleymills | 0:714293de3836 | 22 | |
ashleymills | 0:714293de3836 | 23 | |
ashleymills | 0:714293de3836 | 24 | #ifdef HAVE_CONFIG_H |
ashleymills | 0:714293de3836 | 25 | #include <config.h> |
ashleymills | 0:714293de3836 | 26 | #endif |
ashleymills | 0:714293de3836 | 27 | |
ashleymills | 0:714293de3836 | 28 | #include <cyassl/ctaocrypt/settings.h> |
ashleymills | 0:714293de3836 | 29 | |
ashleymills | 0:714293de3836 | 30 | #ifdef CYASSL_SNIFFER |
ashleymills | 0:714293de3836 | 31 | |
ashleymills | 0:714293de3836 | 32 | #include <assert.h> |
ashleymills | 0:714293de3836 | 33 | #include <time.h> |
ashleymills | 0:714293de3836 | 34 | |
ashleymills | 0:714293de3836 | 35 | #ifndef _WIN32 |
ashleymills | 0:714293de3836 | 36 | #include <arpa/inet.h> |
ashleymills | 0:714293de3836 | 37 | #endif |
ashleymills | 0:714293de3836 | 38 | |
ashleymills | 0:714293de3836 | 39 | #ifdef _WIN32 |
ashleymills | 0:714293de3836 | 40 | #define SNPRINTF _snprintf |
ashleymills | 0:714293de3836 | 41 | #else |
ashleymills | 0:714293de3836 | 42 | #define SNPRINTF snprintf |
ashleymills | 0:714293de3836 | 43 | #endif |
ashleymills | 0:714293de3836 | 44 | |
ashleymills | 0:714293de3836 | 45 | #include <cyassl/openssl/ssl.h> |
ashleymills | 0:714293de3836 | 46 | #include <cyassl/internal.h> |
ashleymills | 0:714293de3836 | 47 | #include <cyassl/ctaoerror.h> |
ashleymills | 0:714293de3836 | 48 | #include <cyassl/sniffer.h> |
ashleymills | 0:714293de3836 | 49 | #include <cyassl/sniffer_error.h> |
ashleymills | 0:714293de3836 | 50 | |
ashleymills | 0:714293de3836 | 51 | |
ashleymills | 0:714293de3836 | 52 | #ifndef min |
ashleymills | 0:714293de3836 | 53 | |
ashleymills | 0:714293de3836 | 54 | static INLINE word32 min(word32 a, word32 b) |
ashleymills | 0:714293de3836 | 55 | { |
ashleymills | 0:714293de3836 | 56 | return a > b ? b : a; |
ashleymills | 0:714293de3836 | 57 | } |
ashleymills | 0:714293de3836 | 58 | |
ashleymills | 0:714293de3836 | 59 | #endif |
ashleymills | 0:714293de3836 | 60 | |
ashleymills | 0:714293de3836 | 61 | |
ashleymills | 0:714293de3836 | 62 | /* Misc constants */ |
ashleymills | 0:714293de3836 | 63 | enum { |
ashleymills | 0:714293de3836 | 64 | MAX_SERVER_ADDRESS = 128, /* maximum server address length */ |
ashleymills | 0:714293de3836 | 65 | MAX_ERROR_LEN = 80, /* maximum error length */ |
ashleymills | 0:714293de3836 | 66 | ETHER_IF_ADDR_LEN = 6, /* ethernet interface address length */ |
ashleymills | 0:714293de3836 | 67 | LOCAL_IF_ADDR_LEN = 4, /* localhost interface address length, !windows */ |
ashleymills | 0:714293de3836 | 68 | TCP_PROTO = 6, /* TCP_PROTOCOL */ |
ashleymills | 0:714293de3836 | 69 | IP_HDR_SZ = 20, /* IP header legnth, min */ |
ashleymills | 0:714293de3836 | 70 | TCP_HDR_SZ = 20, /* TCP header legnth, min */ |
ashleymills | 0:714293de3836 | 71 | IPV4 = 4, /* IP version 4 */ |
ashleymills | 0:714293de3836 | 72 | TCP_PROTOCOL = 6, /* TCP Protocol id */ |
ashleymills | 0:714293de3836 | 73 | TRACE_MSG_SZ = 80, /* Trace Message buffer size */ |
ashleymills | 0:714293de3836 | 74 | HASH_SIZE = 499, /* Session Hash Table Rows */ |
ashleymills | 0:714293de3836 | 75 | PSEUDO_HDR_SZ = 12, /* TCP Pseudo Header size in bytes */ |
ashleymills | 0:714293de3836 | 76 | FATAL_ERROR_STATE = 1, /* SnifferSession fatal error state */ |
ashleymills | 0:714293de3836 | 77 | SNIFFER_TIMEOUT = 900, /* Cache unclosed Sessions for 15 minutes */ |
ashleymills | 0:714293de3836 | 78 | TICKET_HINT_LEN = 4, /* Session Ticket Hint length */ |
ashleymills | 0:714293de3836 | 79 | EXT_TYPE_SZ = 2, /* Extension length */ |
ashleymills | 0:714293de3836 | 80 | MAX_INPUT_SZ = MAX_RECORD_SIZE + COMP_EXTRA + MAX_MSG_EXTRA + |
ashleymills | 0:714293de3836 | 81 | MTU_EXTRA, /* Max input sz of reassembly */ |
ashleymills | 0:714293de3836 | 82 | TICKET_EXT_ID = 0x23 /* Session Ticket Extension ID */ |
ashleymills | 0:714293de3836 | 83 | }; |
ashleymills | 0:714293de3836 | 84 | |
ashleymills | 0:714293de3836 | 85 | |
ashleymills | 0:714293de3836 | 86 | #ifdef _WIN32 |
ashleymills | 0:714293de3836 | 87 | |
ashleymills | 0:714293de3836 | 88 | static HMODULE dllModule; /* for error string resources */ |
ashleymills | 0:714293de3836 | 89 | |
ashleymills | 0:714293de3836 | 90 | BOOL APIENTRY DllMain( HMODULE hModule, |
ashleymills | 0:714293de3836 | 91 | DWORD ul_reason_for_call, |
ashleymills | 0:714293de3836 | 92 | LPVOID lpReserved |
ashleymills | 0:714293de3836 | 93 | ) |
ashleymills | 0:714293de3836 | 94 | { |
ashleymills | 0:714293de3836 | 95 | static int didInit = 0; |
ashleymills | 0:714293de3836 | 96 | |
ashleymills | 0:714293de3836 | 97 | switch (ul_reason_for_call) |
ashleymills | 0:714293de3836 | 98 | { |
ashleymills | 0:714293de3836 | 99 | case DLL_PROCESS_ATTACH: |
ashleymills | 0:714293de3836 | 100 | if (didInit == 0) { |
ashleymills | 0:714293de3836 | 101 | dllModule = hModule; |
ashleymills | 0:714293de3836 | 102 | ssl_InitSniffer(); |
ashleymills | 0:714293de3836 | 103 | didInit = 1; |
ashleymills | 0:714293de3836 | 104 | } |
ashleymills | 0:714293de3836 | 105 | break; |
ashleymills | 0:714293de3836 | 106 | case DLL_THREAD_ATTACH: |
ashleymills | 0:714293de3836 | 107 | break; |
ashleymills | 0:714293de3836 | 108 | case DLL_THREAD_DETACH: |
ashleymills | 0:714293de3836 | 109 | break; |
ashleymills | 0:714293de3836 | 110 | case DLL_PROCESS_DETACH: |
ashleymills | 0:714293de3836 | 111 | if (didInit) { |
ashleymills | 0:714293de3836 | 112 | ssl_FreeSniffer(); |
ashleymills | 0:714293de3836 | 113 | didInit = 0; |
ashleymills | 0:714293de3836 | 114 | } |
ashleymills | 0:714293de3836 | 115 | break; |
ashleymills | 0:714293de3836 | 116 | } |
ashleymills | 0:714293de3836 | 117 | return TRUE; |
ashleymills | 0:714293de3836 | 118 | } |
ashleymills | 0:714293de3836 | 119 | |
ashleymills | 0:714293de3836 | 120 | #endif /* _WIN32 */ |
ashleymills | 0:714293de3836 | 121 | |
ashleymills | 0:714293de3836 | 122 | |
ashleymills | 0:714293de3836 | 123 | static int TraceOn = 0; /* Trace is off by default */ |
ashleymills | 0:714293de3836 | 124 | static FILE* TraceFile = 0; |
ashleymills | 0:714293de3836 | 125 | |
ashleymills | 0:714293de3836 | 126 | |
ashleymills | 0:714293de3836 | 127 | /* windows uses .rc table for this */ |
ashleymills | 0:714293de3836 | 128 | #ifndef _WIN32 |
ashleymills | 0:714293de3836 | 129 | |
ashleymills | 0:714293de3836 | 130 | static const char* const msgTable[] = |
ashleymills | 0:714293de3836 | 131 | { |
ashleymills | 0:714293de3836 | 132 | /* 1 */ |
ashleymills | 0:714293de3836 | 133 | "Out of Memory", |
ashleymills | 0:714293de3836 | 134 | "New SSL Sniffer Server Registered", |
ashleymills | 0:714293de3836 | 135 | "Checking IP Header", |
ashleymills | 0:714293de3836 | 136 | "SSL Sniffer Server Not Registered", |
ashleymills | 0:714293de3836 | 137 | "Checking TCP Header", |
ashleymills | 0:714293de3836 | 138 | |
ashleymills | 0:714293de3836 | 139 | /* 6 */ |
ashleymills | 0:714293de3836 | 140 | "SSL Sniffer Server Port Not Registered", |
ashleymills | 0:714293de3836 | 141 | "RSA Private Decrypt Error", |
ashleymills | 0:714293de3836 | 142 | "RSA Private Decode Error", |
ashleymills | 0:714293de3836 | 143 | "Set Cipher Spec Error", |
ashleymills | 0:714293de3836 | 144 | "Server Hello Input Malformed", |
ashleymills | 0:714293de3836 | 145 | |
ashleymills | 0:714293de3836 | 146 | /* 11 */ |
ashleymills | 0:714293de3836 | 147 | "Couldn't Resume Session Error", |
ashleymills | 0:714293de3836 | 148 | "Server Did Resumption", |
ashleymills | 0:714293de3836 | 149 | "Client Hello Input Malformed", |
ashleymills | 0:714293de3836 | 150 | "Client Trying to Resume", |
ashleymills | 0:714293de3836 | 151 | "Handshake Input Malformed", |
ashleymills | 0:714293de3836 | 152 | |
ashleymills | 0:714293de3836 | 153 | /* 16 */ |
ashleymills | 0:714293de3836 | 154 | "Got Hello Verify msg", |
ashleymills | 0:714293de3836 | 155 | "Got Server Hello msg", |
ashleymills | 0:714293de3836 | 156 | "Got Cert Request msg", |
ashleymills | 0:714293de3836 | 157 | "Got Server Key Exchange msg", |
ashleymills | 0:714293de3836 | 158 | "Got Cert msg", |
ashleymills | 0:714293de3836 | 159 | |
ashleymills | 0:714293de3836 | 160 | /* 21 */ |
ashleymills | 0:714293de3836 | 161 | "Got Server Hello Done msg", |
ashleymills | 0:714293de3836 | 162 | "Got Finished msg", |
ashleymills | 0:714293de3836 | 163 | "Got Client Hello msg", |
ashleymills | 0:714293de3836 | 164 | "Got Client Key Exchange msg", |
ashleymills | 0:714293de3836 | 165 | "Got Cert Verify msg", |
ashleymills | 0:714293de3836 | 166 | |
ashleymills | 0:714293de3836 | 167 | /* 26 */ |
ashleymills | 0:714293de3836 | 168 | "Got Unknown Handshake msg", |
ashleymills | 0:714293de3836 | 169 | "New SSL Sniffer Session created", |
ashleymills | 0:714293de3836 | 170 | "Couldn't create new SSL", |
ashleymills | 0:714293de3836 | 171 | "Got a Packet to decode", |
ashleymills | 0:714293de3836 | 172 | "No data present", |
ashleymills | 0:714293de3836 | 173 | |
ashleymills | 0:714293de3836 | 174 | /* 31 */ |
ashleymills | 0:714293de3836 | 175 | "Session Not Found", |
ashleymills | 0:714293de3836 | 176 | "Got an Old Client Hello msg", |
ashleymills | 0:714293de3836 | 177 | "Old Client Hello Input Malformed", |
ashleymills | 0:714293de3836 | 178 | "Old Client Hello OK", |
ashleymills | 0:714293de3836 | 179 | "Bad Old Client Hello", |
ashleymills | 0:714293de3836 | 180 | |
ashleymills | 0:714293de3836 | 181 | /* 36 */ |
ashleymills | 0:714293de3836 | 182 | "Bad Record Header", |
ashleymills | 0:714293de3836 | 183 | "Record Header Input Malformed", |
ashleymills | 0:714293de3836 | 184 | "Got a HandShake msg", |
ashleymills | 0:714293de3836 | 185 | "Bad HandShake msg", |
ashleymills | 0:714293de3836 | 186 | "Got a Change Cipher Spec msg", |
ashleymills | 0:714293de3836 | 187 | |
ashleymills | 0:714293de3836 | 188 | /* 41 */ |
ashleymills | 0:714293de3836 | 189 | "Got Application Data msg", |
ashleymills | 0:714293de3836 | 190 | "Bad Application Data", |
ashleymills | 0:714293de3836 | 191 | "Got an Alert msg", |
ashleymills | 0:714293de3836 | 192 | "Another msg to Process", |
ashleymills | 0:714293de3836 | 193 | "Removing Session From Table", |
ashleymills | 0:714293de3836 | 194 | |
ashleymills | 0:714293de3836 | 195 | /* 46 */ |
ashleymills | 0:714293de3836 | 196 | "Bad Key File", |
ashleymills | 0:714293de3836 | 197 | "Wrong IP Version", |
ashleymills | 0:714293de3836 | 198 | "Wrong Protocol type", |
ashleymills | 0:714293de3836 | 199 | "Packet Short for header processing", |
ashleymills | 0:714293de3836 | 200 | "Got Unknown Record Type", |
ashleymills | 0:714293de3836 | 201 | |
ashleymills | 0:714293de3836 | 202 | /* 51 */ |
ashleymills | 0:714293de3836 | 203 | "Can't Open Trace File", |
ashleymills | 0:714293de3836 | 204 | "Session in Fatal Error State", |
ashleymills | 0:714293de3836 | 205 | "Partial SSL record received", |
ashleymills | 0:714293de3836 | 206 | "Buffer Error, malformed input", |
ashleymills | 0:714293de3836 | 207 | "Added to Partial Input", |
ashleymills | 0:714293de3836 | 208 | |
ashleymills | 0:714293de3836 | 209 | /* 56 */ |
ashleymills | 0:714293de3836 | 210 | "Received a Duplicate Packet", |
ashleymills | 0:714293de3836 | 211 | "Received an Out of Order Packet", |
ashleymills | 0:714293de3836 | 212 | "Received an Overlap Duplicate Packet", |
ashleymills | 0:714293de3836 | 213 | "Received an Overlap Reassembly Begin Duplicate Packet", |
ashleymills | 0:714293de3836 | 214 | "Received an Overlap Reassembly End Duplicate Packet", |
ashleymills | 0:714293de3836 | 215 | |
ashleymills | 0:714293de3836 | 216 | /* 61 */ |
ashleymills | 0:714293de3836 | 217 | "Missed the Client Hello Entirely", |
ashleymills | 0:714293de3836 | 218 | "Got Hello Request msg", |
ashleymills | 0:714293de3836 | 219 | "Got Session Ticket msg", |
ashleymills | 0:714293de3836 | 220 | "Bad Input", |
ashleymills | 0:714293de3836 | 221 | "Bad Decrypt Type", |
ashleymills | 0:714293de3836 | 222 | |
ashleymills | 0:714293de3836 | 223 | /* 66 */ |
ashleymills | 0:714293de3836 | 224 | "Bad Finished Message Processing", |
ashleymills | 0:714293de3836 | 225 | "Bad Compression Type", |
ashleymills | 0:714293de3836 | 226 | "Bad DeriveKeys Error", |
ashleymills | 0:714293de3836 | 227 | "Saw ACK for Missing Packet Error" |
ashleymills | 0:714293de3836 | 228 | }; |
ashleymills | 0:714293de3836 | 229 | |
ashleymills | 0:714293de3836 | 230 | |
ashleymills | 0:714293de3836 | 231 | /* *nix version uses table above */ |
ashleymills | 0:714293de3836 | 232 | static void GetError(int idx, char* str) |
ashleymills | 0:714293de3836 | 233 | { |
ashleymills | 0:714293de3836 | 234 | XSTRNCPY(str, msgTable[idx - 1], MAX_ERROR_LEN); |
ashleymills | 0:714293de3836 | 235 | } |
ashleymills | 0:714293de3836 | 236 | |
ashleymills | 0:714293de3836 | 237 | |
ashleymills | 0:714293de3836 | 238 | #else /* _WIN32 */ |
ashleymills | 0:714293de3836 | 239 | |
ashleymills | 0:714293de3836 | 240 | |
ashleymills | 0:714293de3836 | 241 | /* Windows version uses .rc table */ |
ashleymills | 0:714293de3836 | 242 | static void GetError(int idx, char* buffer) |
ashleymills | 0:714293de3836 | 243 | { |
ashleymills | 0:714293de3836 | 244 | if (!LoadStringA(dllModule, idx, buffer, MAX_ERROR_LEN)) |
ashleymills | 0:714293de3836 | 245 | buffer[0] = 0; |
ashleymills | 0:714293de3836 | 246 | } |
ashleymills | 0:714293de3836 | 247 | |
ashleymills | 0:714293de3836 | 248 | |
ashleymills | 0:714293de3836 | 249 | #endif /* _WIN32 */ |
ashleymills | 0:714293de3836 | 250 | |
ashleymills | 0:714293de3836 | 251 | |
ashleymills | 0:714293de3836 | 252 | /* Packet Buffer for reassembly list and ready list */ |
ashleymills | 0:714293de3836 | 253 | typedef struct PacketBuffer { |
ashleymills | 0:714293de3836 | 254 | word32 begin; /* relative sequence begin */ |
ashleymills | 0:714293de3836 | 255 | word32 end; /* relative sequence end */ |
ashleymills | 0:714293de3836 | 256 | byte* data; /* actual data */ |
ashleymills | 0:714293de3836 | 257 | struct PacketBuffer* next; /* next on reassembly list or ready list */ |
ashleymills | 0:714293de3836 | 258 | } PacketBuffer; |
ashleymills | 0:714293de3836 | 259 | |
ashleymills | 0:714293de3836 | 260 | |
ashleymills | 0:714293de3836 | 261 | /* Sniffer Server holds info for each server/port monitored */ |
ashleymills | 0:714293de3836 | 262 | typedef struct SnifferServer { |
ashleymills | 0:714293de3836 | 263 | SSL_CTX* ctx; /* SSL context */ |
ashleymills | 0:714293de3836 | 264 | char address[MAX_SERVER_ADDRESS]; /* passed in server address */ |
ashleymills | 0:714293de3836 | 265 | word32 server; /* netowrk order address */ |
ashleymills | 0:714293de3836 | 266 | int port; /* server port */ |
ashleymills | 0:714293de3836 | 267 | struct SnifferServer* next; /* for list */ |
ashleymills | 0:714293de3836 | 268 | } SnifferServer; |
ashleymills | 0:714293de3836 | 269 | |
ashleymills | 0:714293de3836 | 270 | |
ashleymills | 0:714293de3836 | 271 | /* Session Flags */ |
ashleymills | 0:714293de3836 | 272 | typedef struct Flags { |
ashleymills | 0:714293de3836 | 273 | byte side; /* which end is current packet headed */ |
ashleymills | 0:714293de3836 | 274 | byte serverCipherOn; /* indicates whether cipher is active */ |
ashleymills | 0:714293de3836 | 275 | byte clientCipherOn; /* indicates whether cipher is active */ |
ashleymills | 0:714293de3836 | 276 | byte resuming; /* did this session come from resumption */ |
ashleymills | 0:714293de3836 | 277 | byte cached; /* have we cached this session yet */ |
ashleymills | 0:714293de3836 | 278 | byte clientHello; /* processed client hello yet, for SSLv2 */ |
ashleymills | 0:714293de3836 | 279 | byte finCount; /* get both FINs before removing */ |
ashleymills | 0:714293de3836 | 280 | byte fatalError; /* fatal error state */ |
ashleymills | 0:714293de3836 | 281 | } Flags; |
ashleymills | 0:714293de3836 | 282 | |
ashleymills | 0:714293de3836 | 283 | |
ashleymills | 0:714293de3836 | 284 | /* Out of Order FIN caputre */ |
ashleymills | 0:714293de3836 | 285 | typedef struct FinCaputre { |
ashleymills | 0:714293de3836 | 286 | word32 cliFinSeq; /* client relative sequence FIN 0 is no */ |
ashleymills | 0:714293de3836 | 287 | word32 srvFinSeq; /* server relative sequence FIN, 0 is no */ |
ashleymills | 0:714293de3836 | 288 | byte cliCounted; /* did we count yet, detects duplicates */ |
ashleymills | 0:714293de3836 | 289 | byte srvCounted; /* did we count yet, detects duplicates */ |
ashleymills | 0:714293de3836 | 290 | } FinCaputre; |
ashleymills | 0:714293de3836 | 291 | |
ashleymills | 0:714293de3836 | 292 | |
ashleymills | 0:714293de3836 | 293 | /* Sniffer Session holds info for each client/server SSL/TLS session */ |
ashleymills | 0:714293de3836 | 294 | typedef struct SnifferSession { |
ashleymills | 0:714293de3836 | 295 | SnifferServer* context; /* server context */ |
ashleymills | 0:714293de3836 | 296 | SSL* sslServer; /* SSL server side decode */ |
ashleymills | 0:714293de3836 | 297 | SSL* sslClient; /* SSL client side decode */ |
ashleymills | 0:714293de3836 | 298 | word32 server; /* server address in network byte order */ |
ashleymills | 0:714293de3836 | 299 | word32 client; /* client address in network byte order */ |
ashleymills | 0:714293de3836 | 300 | word16 srvPort; /* server port */ |
ashleymills | 0:714293de3836 | 301 | word16 cliPort; /* client port */ |
ashleymills | 0:714293de3836 | 302 | word32 cliSeqStart; /* client start sequence */ |
ashleymills | 0:714293de3836 | 303 | word32 srvSeqStart; /* server start sequence */ |
ashleymills | 0:714293de3836 | 304 | word32 cliExpected; /* client expected sequence (relative) */ |
ashleymills | 0:714293de3836 | 305 | word32 srvExpected; /* server expected sequence (relative) */ |
ashleymills | 0:714293de3836 | 306 | FinCaputre finCaputre; /* retain out of order FIN s */ |
ashleymills | 0:714293de3836 | 307 | Flags flags; /* session flags */ |
ashleymills | 0:714293de3836 | 308 | time_t lastUsed; /* last used ticks */ |
ashleymills | 0:714293de3836 | 309 | PacketBuffer* cliReassemblyList; /* client out of order packets */ |
ashleymills | 0:714293de3836 | 310 | PacketBuffer* srvReassemblyList; /* server out of order packets */ |
ashleymills | 0:714293de3836 | 311 | struct SnifferSession* next; /* for hash table list */ |
ashleymills | 0:714293de3836 | 312 | byte* ticketID; /* mac ID of session ticket */ |
ashleymills | 0:714293de3836 | 313 | } SnifferSession; |
ashleymills | 0:714293de3836 | 314 | |
ashleymills | 0:714293de3836 | 315 | |
ashleymills | 0:714293de3836 | 316 | /* Sniffer Server List and mutex */ |
ashleymills | 0:714293de3836 | 317 | static SnifferServer* ServerList = 0; |
ashleymills | 0:714293de3836 | 318 | static CyaSSL_Mutex ServerListMutex; |
ashleymills | 0:714293de3836 | 319 | |
ashleymills | 0:714293de3836 | 320 | |
ashleymills | 0:714293de3836 | 321 | /* Session Hash Table, mutex, and count */ |
ashleymills | 0:714293de3836 | 322 | static SnifferSession* SessionTable[HASH_SIZE]; |
ashleymills | 0:714293de3836 | 323 | static CyaSSL_Mutex SessionMutex; |
ashleymills | 0:714293de3836 | 324 | static int SessionCount = 0; |
ashleymills | 0:714293de3836 | 325 | |
ashleymills | 0:714293de3836 | 326 | |
ashleymills | 0:714293de3836 | 327 | /* Initialize overall Sniffer */ |
ashleymills | 0:714293de3836 | 328 | void ssl_InitSniffer(void) |
ashleymills | 0:714293de3836 | 329 | { |
ashleymills | 0:714293de3836 | 330 | CyaSSL_Init(); |
ashleymills | 0:714293de3836 | 331 | InitMutex(&ServerListMutex); |
ashleymills | 0:714293de3836 | 332 | InitMutex(&SessionMutex); |
ashleymills | 0:714293de3836 | 333 | } |
ashleymills | 0:714293de3836 | 334 | |
ashleymills | 0:714293de3836 | 335 | |
ashleymills | 0:714293de3836 | 336 | /* Free Sniffer Server's resources/self */ |
ashleymills | 0:714293de3836 | 337 | static void FreeSnifferServer(SnifferServer* srv) |
ashleymills | 0:714293de3836 | 338 | { |
ashleymills | 0:714293de3836 | 339 | if (srv) |
ashleymills | 0:714293de3836 | 340 | SSL_CTX_free(srv->ctx); |
ashleymills | 0:714293de3836 | 341 | free(srv); |
ashleymills | 0:714293de3836 | 342 | } |
ashleymills | 0:714293de3836 | 343 | |
ashleymills | 0:714293de3836 | 344 | |
ashleymills | 0:714293de3836 | 345 | /* free PacketBuffer's resources/self */ |
ashleymills | 0:714293de3836 | 346 | static void FreePacketBuffer(PacketBuffer* del) |
ashleymills | 0:714293de3836 | 347 | { |
ashleymills | 0:714293de3836 | 348 | if (del) { |
ashleymills | 0:714293de3836 | 349 | free(del->data); |
ashleymills | 0:714293de3836 | 350 | free(del); |
ashleymills | 0:714293de3836 | 351 | } |
ashleymills | 0:714293de3836 | 352 | } |
ashleymills | 0:714293de3836 | 353 | |
ashleymills | 0:714293de3836 | 354 | |
ashleymills | 0:714293de3836 | 355 | /* remove PacketBuffer List */ |
ashleymills | 0:714293de3836 | 356 | static void FreePacketList(PacketBuffer* in) |
ashleymills | 0:714293de3836 | 357 | { |
ashleymills | 0:714293de3836 | 358 | if (in) { |
ashleymills | 0:714293de3836 | 359 | PacketBuffer* del; |
ashleymills | 0:714293de3836 | 360 | PacketBuffer* packet = in; |
ashleymills | 0:714293de3836 | 361 | |
ashleymills | 0:714293de3836 | 362 | while (packet) { |
ashleymills | 0:714293de3836 | 363 | del = packet; |
ashleymills | 0:714293de3836 | 364 | packet = packet->next; |
ashleymills | 0:714293de3836 | 365 | FreePacketBuffer(del); |
ashleymills | 0:714293de3836 | 366 | } |
ashleymills | 0:714293de3836 | 367 | } |
ashleymills | 0:714293de3836 | 368 | } |
ashleymills | 0:714293de3836 | 369 | |
ashleymills | 0:714293de3836 | 370 | |
ashleymills | 0:714293de3836 | 371 | /* Free Sniffer Session's resources/self */ |
ashleymills | 0:714293de3836 | 372 | static void FreeSnifferSession(SnifferSession* session) |
ashleymills | 0:714293de3836 | 373 | { |
ashleymills | 0:714293de3836 | 374 | if (session) { |
ashleymills | 0:714293de3836 | 375 | SSL_free(session->sslClient); |
ashleymills | 0:714293de3836 | 376 | SSL_free(session->sslServer); |
ashleymills | 0:714293de3836 | 377 | |
ashleymills | 0:714293de3836 | 378 | FreePacketList(session->cliReassemblyList); |
ashleymills | 0:714293de3836 | 379 | FreePacketList(session->srvReassemblyList); |
ashleymills | 0:714293de3836 | 380 | |
ashleymills | 0:714293de3836 | 381 | free(session->ticketID); |
ashleymills | 0:714293de3836 | 382 | } |
ashleymills | 0:714293de3836 | 383 | free(session); |
ashleymills | 0:714293de3836 | 384 | } |
ashleymills | 0:714293de3836 | 385 | |
ashleymills | 0:714293de3836 | 386 | |
ashleymills | 0:714293de3836 | 387 | /* Free overall Sniffer */ |
ashleymills | 0:714293de3836 | 388 | void ssl_FreeSniffer(void) |
ashleymills | 0:714293de3836 | 389 | { |
ashleymills | 0:714293de3836 | 390 | SnifferServer* srv; |
ashleymills | 0:714293de3836 | 391 | SnifferServer* removeServer; |
ashleymills | 0:714293de3836 | 392 | SnifferSession* session; |
ashleymills | 0:714293de3836 | 393 | SnifferSession* removeSession; |
ashleymills | 0:714293de3836 | 394 | int i; |
ashleymills | 0:714293de3836 | 395 | |
ashleymills | 0:714293de3836 | 396 | LockMutex(&ServerListMutex); |
ashleymills | 0:714293de3836 | 397 | LockMutex(&SessionMutex); |
ashleymills | 0:714293de3836 | 398 | |
ashleymills | 0:714293de3836 | 399 | srv = ServerList; |
ashleymills | 0:714293de3836 | 400 | while (srv) { |
ashleymills | 0:714293de3836 | 401 | removeServer = srv; |
ashleymills | 0:714293de3836 | 402 | srv = srv->next; |
ashleymills | 0:714293de3836 | 403 | FreeSnifferServer(removeServer); |
ashleymills | 0:714293de3836 | 404 | } |
ashleymills | 0:714293de3836 | 405 | |
ashleymills | 0:714293de3836 | 406 | for (i = 0; i < HASH_SIZE; i++) { |
ashleymills | 0:714293de3836 | 407 | session = SessionTable[i]; |
ashleymills | 0:714293de3836 | 408 | while (session) { |
ashleymills | 0:714293de3836 | 409 | removeSession = session; |
ashleymills | 0:714293de3836 | 410 | session = session->next; |
ashleymills | 0:714293de3836 | 411 | FreeSnifferSession(removeSession); |
ashleymills | 0:714293de3836 | 412 | } |
ashleymills | 0:714293de3836 | 413 | } |
ashleymills | 0:714293de3836 | 414 | |
ashleymills | 0:714293de3836 | 415 | UnLockMutex(&SessionMutex); |
ashleymills | 0:714293de3836 | 416 | UnLockMutex(&ServerListMutex); |
ashleymills | 0:714293de3836 | 417 | |
ashleymills | 0:714293de3836 | 418 | FreeMutex(&SessionMutex); |
ashleymills | 0:714293de3836 | 419 | FreeMutex(&ServerListMutex); |
ashleymills | 0:714293de3836 | 420 | CyaSSL_Cleanup(); |
ashleymills | 0:714293de3836 | 421 | } |
ashleymills | 0:714293de3836 | 422 | |
ashleymills | 0:714293de3836 | 423 | |
ashleymills | 0:714293de3836 | 424 | /* Initialize a SnifferServer */ |
ashleymills | 0:714293de3836 | 425 | static void InitSnifferServer(SnifferServer* sniffer) |
ashleymills | 0:714293de3836 | 426 | { |
ashleymills | 0:714293de3836 | 427 | sniffer->ctx = 0; |
ashleymills | 0:714293de3836 | 428 | XMEMSET(sniffer->address, 0, MAX_SERVER_ADDRESS); |
ashleymills | 0:714293de3836 | 429 | sniffer->server = 0; |
ashleymills | 0:714293de3836 | 430 | sniffer->port = 0; |
ashleymills | 0:714293de3836 | 431 | sniffer->next = 0; |
ashleymills | 0:714293de3836 | 432 | } |
ashleymills | 0:714293de3836 | 433 | |
ashleymills | 0:714293de3836 | 434 | |
ashleymills | 0:714293de3836 | 435 | /* Initialize session flags */ |
ashleymills | 0:714293de3836 | 436 | static void InitFlags(Flags* flags) |
ashleymills | 0:714293de3836 | 437 | { |
ashleymills | 0:714293de3836 | 438 | flags->side = 0; |
ashleymills | 0:714293de3836 | 439 | flags->serverCipherOn = 0; |
ashleymills | 0:714293de3836 | 440 | flags->clientCipherOn = 0; |
ashleymills | 0:714293de3836 | 441 | flags->resuming = 0; |
ashleymills | 0:714293de3836 | 442 | flags->cached = 0; |
ashleymills | 0:714293de3836 | 443 | flags->clientHello = 0; |
ashleymills | 0:714293de3836 | 444 | flags->finCount = 0; |
ashleymills | 0:714293de3836 | 445 | flags->fatalError = 0; |
ashleymills | 0:714293de3836 | 446 | } |
ashleymills | 0:714293de3836 | 447 | |
ashleymills | 0:714293de3836 | 448 | |
ashleymills | 0:714293de3836 | 449 | /* Initialize FIN Capture */ |
ashleymills | 0:714293de3836 | 450 | static void InitFinCapture(FinCaputre* cap) |
ashleymills | 0:714293de3836 | 451 | { |
ashleymills | 0:714293de3836 | 452 | cap->cliFinSeq = 0; |
ashleymills | 0:714293de3836 | 453 | cap->srvFinSeq = 0; |
ashleymills | 0:714293de3836 | 454 | cap->cliCounted = 0; |
ashleymills | 0:714293de3836 | 455 | cap->srvCounted = 0; |
ashleymills | 0:714293de3836 | 456 | } |
ashleymills | 0:714293de3836 | 457 | |
ashleymills | 0:714293de3836 | 458 | |
ashleymills | 0:714293de3836 | 459 | /* Initialize a Sniffer Session */ |
ashleymills | 0:714293de3836 | 460 | static void InitSession(SnifferSession* session) |
ashleymills | 0:714293de3836 | 461 | { |
ashleymills | 0:714293de3836 | 462 | session->context = 0; |
ashleymills | 0:714293de3836 | 463 | session->sslServer = 0; |
ashleymills | 0:714293de3836 | 464 | session->sslClient = 0; |
ashleymills | 0:714293de3836 | 465 | session->server = 0; |
ashleymills | 0:714293de3836 | 466 | session->client = 0; |
ashleymills | 0:714293de3836 | 467 | session->srvPort = 0; |
ashleymills | 0:714293de3836 | 468 | session->cliPort = 0; |
ashleymills | 0:714293de3836 | 469 | session->cliSeqStart = 0; |
ashleymills | 0:714293de3836 | 470 | session->srvSeqStart = 0; |
ashleymills | 0:714293de3836 | 471 | session->cliExpected = 0; |
ashleymills | 0:714293de3836 | 472 | session->srvExpected = 0; |
ashleymills | 0:714293de3836 | 473 | session->lastUsed = 0; |
ashleymills | 0:714293de3836 | 474 | session->cliReassemblyList = 0; |
ashleymills | 0:714293de3836 | 475 | session->srvReassemblyList = 0; |
ashleymills | 0:714293de3836 | 476 | session->next = 0; |
ashleymills | 0:714293de3836 | 477 | session->ticketID = 0; |
ashleymills | 0:714293de3836 | 478 | |
ashleymills | 0:714293de3836 | 479 | InitFlags(&session->flags); |
ashleymills | 0:714293de3836 | 480 | InitFinCapture(&session->finCaputre); |
ashleymills | 0:714293de3836 | 481 | } |
ashleymills | 0:714293de3836 | 482 | |
ashleymills | 0:714293de3836 | 483 | |
ashleymills | 0:714293de3836 | 484 | /* IP Info from IP Header */ |
ashleymills | 0:714293de3836 | 485 | typedef struct IpInfo { |
ashleymills | 0:714293de3836 | 486 | int length; /* length of this header */ |
ashleymills | 0:714293de3836 | 487 | int total; /* total length of fragment */ |
ashleymills | 0:714293de3836 | 488 | word32 src; /* network order source address */ |
ashleymills | 0:714293de3836 | 489 | word32 dst; /* network order destination address */ |
ashleymills | 0:714293de3836 | 490 | } IpInfo; |
ashleymills | 0:714293de3836 | 491 | |
ashleymills | 0:714293de3836 | 492 | |
ashleymills | 0:714293de3836 | 493 | /* TCP Info from TCP Header */ |
ashleymills | 0:714293de3836 | 494 | typedef struct TcpInfo { |
ashleymills | 0:714293de3836 | 495 | int srcPort; /* source port */ |
ashleymills | 0:714293de3836 | 496 | int dstPort; /* source port */ |
ashleymills | 0:714293de3836 | 497 | int length; /* length of this header */ |
ashleymills | 0:714293de3836 | 498 | word32 sequence; /* sequence number */ |
ashleymills | 0:714293de3836 | 499 | word32 ackNumber; /* ack number */ |
ashleymills | 0:714293de3836 | 500 | byte fin; /* FIN set */ |
ashleymills | 0:714293de3836 | 501 | byte rst; /* RST set */ |
ashleymills | 0:714293de3836 | 502 | byte syn; /* SYN set */ |
ashleymills | 0:714293de3836 | 503 | byte ack; /* ACK set */ |
ashleymills | 0:714293de3836 | 504 | } TcpInfo; |
ashleymills | 0:714293de3836 | 505 | |
ashleymills | 0:714293de3836 | 506 | |
ashleymills | 0:714293de3836 | 507 | /* Tcp Pseudo Header for Checksum calculation */ |
ashleymills | 0:714293de3836 | 508 | typedef struct TcpPseudoHdr { |
ashleymills | 0:714293de3836 | 509 | word32 src; /* source address */ |
ashleymills | 0:714293de3836 | 510 | word32 dst; /* destination address */ |
ashleymills | 0:714293de3836 | 511 | byte rsv; /* reserved, always 0 */ |
ashleymills | 0:714293de3836 | 512 | byte protocol; /* IP protocol */ |
ashleymills | 0:714293de3836 | 513 | word16 legnth; /* tcp header length + data length (doesn't include */ |
ashleymills | 0:714293de3836 | 514 | /* pseudo header length) network order */ |
ashleymills | 0:714293de3836 | 515 | } TcpPseudoHdr; |
ashleymills | 0:714293de3836 | 516 | |
ashleymills | 0:714293de3836 | 517 | |
ashleymills | 0:714293de3836 | 518 | /* Password Setting Callback */ |
ashleymills | 0:714293de3836 | 519 | static int SetPassword(char* passwd, int sz, int rw, void* userdata) |
ashleymills | 0:714293de3836 | 520 | { |
ashleymills | 0:714293de3836 | 521 | (void)rw; |
ashleymills | 0:714293de3836 | 522 | XSTRNCPY(passwd, userdata, sz); |
ashleymills | 0:714293de3836 | 523 | return (int)XSTRLEN(userdata); |
ashleymills | 0:714293de3836 | 524 | } |
ashleymills | 0:714293de3836 | 525 | |
ashleymills | 0:714293de3836 | 526 | |
ashleymills | 0:714293de3836 | 527 | /* Ethernet Header */ |
ashleymills | 0:714293de3836 | 528 | typedef struct EthernetHdr { |
ashleymills | 0:714293de3836 | 529 | byte dst[ETHER_IF_ADDR_LEN]; /* destination host address */ |
ashleymills | 0:714293de3836 | 530 | byte src[ETHER_IF_ADDR_LEN]; /* source host address */ |
ashleymills | 0:714293de3836 | 531 | word16 type; /* IP, ARP, etc */ |
ashleymills | 0:714293de3836 | 532 | } EthernetHdr; |
ashleymills | 0:714293de3836 | 533 | |
ashleymills | 0:714293de3836 | 534 | |
ashleymills | 0:714293de3836 | 535 | /* IP Header */ |
ashleymills | 0:714293de3836 | 536 | typedef struct IpHdr { |
ashleymills | 0:714293de3836 | 537 | byte ver_hl; /* version/header length */ |
ashleymills | 0:714293de3836 | 538 | byte tos; /* type of service */ |
ashleymills | 0:714293de3836 | 539 | word16 length; /* total length */ |
ashleymills | 0:714293de3836 | 540 | word16 id; /* identification */ |
ashleymills | 0:714293de3836 | 541 | word16 offset; /* fragment offset field */ |
ashleymills | 0:714293de3836 | 542 | byte ttl; /* time to live */ |
ashleymills | 0:714293de3836 | 543 | byte protocol; /* protocol */ |
ashleymills | 0:714293de3836 | 544 | word16 sum; /* checksum */ |
ashleymills | 0:714293de3836 | 545 | word32 src; /* source address */ |
ashleymills | 0:714293de3836 | 546 | word32 dst; /* destination address */ |
ashleymills | 0:714293de3836 | 547 | } IpHdr; |
ashleymills | 0:714293de3836 | 548 | |
ashleymills | 0:714293de3836 | 549 | |
ashleymills | 0:714293de3836 | 550 | #define IP_HL(ip) ( (((ip)->ver_hl) & 0x0f) * 4) |
ashleymills | 0:714293de3836 | 551 | #define IP_V(ip) ( ((ip)->ver_hl) >> 4) |
ashleymills | 0:714293de3836 | 552 | |
ashleymills | 0:714293de3836 | 553 | /* TCP Header */ |
ashleymills | 0:714293de3836 | 554 | typedef struct TcpHdr { |
ashleymills | 0:714293de3836 | 555 | word16 srcPort; /* source port */ |
ashleymills | 0:714293de3836 | 556 | word16 dstPort; /* destination port */ |
ashleymills | 0:714293de3836 | 557 | word32 sequence; /* sequence number */ |
ashleymills | 0:714293de3836 | 558 | word32 ack; /* acknoledgment number */ |
ashleymills | 0:714293de3836 | 559 | byte offset; /* data offset, reserved */ |
ashleymills | 0:714293de3836 | 560 | byte flags; /* option flags */ |
ashleymills | 0:714293de3836 | 561 | word16 window; /* window */ |
ashleymills | 0:714293de3836 | 562 | word16 sum; /* checksum */ |
ashleymills | 0:714293de3836 | 563 | word16 urgent; /* urgent pointer */ |
ashleymills | 0:714293de3836 | 564 | } TcpHdr; |
ashleymills | 0:714293de3836 | 565 | |
ashleymills | 0:714293de3836 | 566 | #define TCP_LEN(tcp) ( (((tcp)->offset & 0xf0) >> 4) * 4) |
ashleymills | 0:714293de3836 | 567 | #define TCP_FIN 0x01 |
ashleymills | 0:714293de3836 | 568 | #define TCP_SYN 0x02 |
ashleymills | 0:714293de3836 | 569 | #define TCP_RST 0x04 |
ashleymills | 0:714293de3836 | 570 | #define TCP_ACK 0x10 |
ashleymills | 0:714293de3836 | 571 | |
ashleymills | 0:714293de3836 | 572 | |
ashleymills | 0:714293de3836 | 573 | |
ashleymills | 0:714293de3836 | 574 | |
ashleymills | 0:714293de3836 | 575 | |
ashleymills | 0:714293de3836 | 576 | /* Use platform specific GetError to write to tracfile if tracing */ |
ashleymills | 0:714293de3836 | 577 | static void Trace(int idx) |
ashleymills | 0:714293de3836 | 578 | { |
ashleymills | 0:714293de3836 | 579 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 580 | char myBuffer[MAX_ERROR_LEN]; |
ashleymills | 0:714293de3836 | 581 | GetError(idx, myBuffer); |
ashleymills | 0:714293de3836 | 582 | fprintf(TraceFile, "\t%s\n", myBuffer); |
ashleymills | 0:714293de3836 | 583 | #ifdef DEBUG_SNIFFER |
ashleymills | 0:714293de3836 | 584 | fprintf(stderr, "\t%s\n", myBuffer); |
ashleymills | 0:714293de3836 | 585 | #endif |
ashleymills | 0:714293de3836 | 586 | } |
ashleymills | 0:714293de3836 | 587 | } |
ashleymills | 0:714293de3836 | 588 | |
ashleymills | 0:714293de3836 | 589 | |
ashleymills | 0:714293de3836 | 590 | /* Show TimeStamp for beginning of packet Trace */ |
ashleymills | 0:714293de3836 | 591 | static void TraceHeader(void) |
ashleymills | 0:714293de3836 | 592 | { |
ashleymills | 0:714293de3836 | 593 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 594 | time_t ticks = time(NULL); |
ashleymills | 0:714293de3836 | 595 | fprintf(TraceFile, "\n%s", ctime(&ticks)); |
ashleymills | 0:714293de3836 | 596 | } |
ashleymills | 0:714293de3836 | 597 | } |
ashleymills | 0:714293de3836 | 598 | |
ashleymills | 0:714293de3836 | 599 | |
ashleymills | 0:714293de3836 | 600 | /* Show Set Server info for Trace */ |
ashleymills | 0:714293de3836 | 601 | static void TraceSetServer(const char* srv, int port, const char* keyFile) |
ashleymills | 0:714293de3836 | 602 | { |
ashleymills | 0:714293de3836 | 603 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 604 | fprintf(TraceFile, "\tTrying to install a new Sniffer Server with\n"); |
ashleymills | 0:714293de3836 | 605 | fprintf(TraceFile, "\tserver: %s, port: %d, keyFile: %s\n", srv, port, |
ashleymills | 0:714293de3836 | 606 | keyFile); |
ashleymills | 0:714293de3836 | 607 | } |
ashleymills | 0:714293de3836 | 608 | } |
ashleymills | 0:714293de3836 | 609 | |
ashleymills | 0:714293de3836 | 610 | |
ashleymills | 0:714293de3836 | 611 | /* Trace got packet number */ |
ashleymills | 0:714293de3836 | 612 | static void TracePacket(void) |
ashleymills | 0:714293de3836 | 613 | { |
ashleymills | 0:714293de3836 | 614 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 615 | static word32 packetNumber = 0; |
ashleymills | 0:714293de3836 | 616 | fprintf(TraceFile, "\tGot a Packet to decode, packet %u\n", |
ashleymills | 0:714293de3836 | 617 | ++packetNumber); |
ashleymills | 0:714293de3836 | 618 | } |
ashleymills | 0:714293de3836 | 619 | } |
ashleymills | 0:714293de3836 | 620 | |
ashleymills | 0:714293de3836 | 621 | |
ashleymills | 0:714293de3836 | 622 | /* Convert network byte order address into human readable */ |
ashleymills | 0:714293de3836 | 623 | static char* IpToS(word32 addr, char* str) |
ashleymills | 0:714293de3836 | 624 | { |
ashleymills | 0:714293de3836 | 625 | byte* p = (byte*)&addr; |
ashleymills | 0:714293de3836 | 626 | |
ashleymills | 0:714293de3836 | 627 | SNPRINTF(str, TRACE_MSG_SZ, "%d.%d.%d.%d", p[0], p[1], p[2], p[3]); |
ashleymills | 0:714293de3836 | 628 | |
ashleymills | 0:714293de3836 | 629 | return str; |
ashleymills | 0:714293de3836 | 630 | } |
ashleymills | 0:714293de3836 | 631 | |
ashleymills | 0:714293de3836 | 632 | |
ashleymills | 0:714293de3836 | 633 | /* Show destination and source address from Ip Hdr for packet Trace */ |
ashleymills | 0:714293de3836 | 634 | static void TraceIP(IpHdr* iphdr) |
ashleymills | 0:714293de3836 | 635 | { |
ashleymills | 0:714293de3836 | 636 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 637 | char src[TRACE_MSG_SZ]; |
ashleymills | 0:714293de3836 | 638 | char dst[TRACE_MSG_SZ]; |
ashleymills | 0:714293de3836 | 639 | fprintf(TraceFile, "\tdst:%s src:%s\n", IpToS(iphdr->dst, dst), |
ashleymills | 0:714293de3836 | 640 | IpToS(iphdr->src, src)); |
ashleymills | 0:714293de3836 | 641 | } |
ashleymills | 0:714293de3836 | 642 | } |
ashleymills | 0:714293de3836 | 643 | |
ashleymills | 0:714293de3836 | 644 | |
ashleymills | 0:714293de3836 | 645 | /* Show destination and source port from Tcp Hdr for packet Trace */ |
ashleymills | 0:714293de3836 | 646 | static void TraceTcp(TcpHdr* tcphdr) |
ashleymills | 0:714293de3836 | 647 | { |
ashleymills | 0:714293de3836 | 648 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 649 | fprintf(TraceFile, "\tdstPort:%u srcPort:%u\n", ntohs(tcphdr->dstPort), |
ashleymills | 0:714293de3836 | 650 | ntohs(tcphdr->srcPort)); |
ashleymills | 0:714293de3836 | 651 | } |
ashleymills | 0:714293de3836 | 652 | } |
ashleymills | 0:714293de3836 | 653 | |
ashleymills | 0:714293de3836 | 654 | |
ashleymills | 0:714293de3836 | 655 | /* Show sequence and payload length for Trace */ |
ashleymills | 0:714293de3836 | 656 | static void TraceSequence(word32 seq, int len) |
ashleymills | 0:714293de3836 | 657 | { |
ashleymills | 0:714293de3836 | 658 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 659 | fprintf(TraceFile, "\tSequence:%u, payload length:%d\n", seq, len); |
ashleymills | 0:714293de3836 | 660 | } |
ashleymills | 0:714293de3836 | 661 | } |
ashleymills | 0:714293de3836 | 662 | |
ashleymills | 0:714293de3836 | 663 | |
ashleymills | 0:714293de3836 | 664 | /* Show sequence and payload length for Trace */ |
ashleymills | 0:714293de3836 | 665 | static void TraceAck(word32 ack, word32 expected) |
ashleymills | 0:714293de3836 | 666 | { |
ashleymills | 0:714293de3836 | 667 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 668 | fprintf(TraceFile, "\tAck:%u Expected:%u\n", ack, expected); |
ashleymills | 0:714293de3836 | 669 | } |
ashleymills | 0:714293de3836 | 670 | } |
ashleymills | 0:714293de3836 | 671 | |
ashleymills | 0:714293de3836 | 672 | |
ashleymills | 0:714293de3836 | 673 | /* Show relative expected and relative received sequences */ |
ashleymills | 0:714293de3836 | 674 | static void TraceRelativeSequence(word32 expected, word32 got) |
ashleymills | 0:714293de3836 | 675 | { |
ashleymills | 0:714293de3836 | 676 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 677 | fprintf(TraceFile, "\tExpected sequence:%u, received sequence:%u\n", |
ashleymills | 0:714293de3836 | 678 | expected, got); |
ashleymills | 0:714293de3836 | 679 | } |
ashleymills | 0:714293de3836 | 680 | } |
ashleymills | 0:714293de3836 | 681 | |
ashleymills | 0:714293de3836 | 682 | |
ashleymills | 0:714293de3836 | 683 | /* Show server sequence startup from SYN */ |
ashleymills | 0:714293de3836 | 684 | static void TraceServerSyn(word32 seq) |
ashleymills | 0:714293de3836 | 685 | { |
ashleymills | 0:714293de3836 | 686 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 687 | fprintf(TraceFile, "\tServer SYN, Sequence Start:%u\n", seq); |
ashleymills | 0:714293de3836 | 688 | } |
ashleymills | 0:714293de3836 | 689 | } |
ashleymills | 0:714293de3836 | 690 | |
ashleymills | 0:714293de3836 | 691 | |
ashleymills | 0:714293de3836 | 692 | /* Show client sequence startup from SYN */ |
ashleymills | 0:714293de3836 | 693 | static void TraceClientSyn(word32 seq) |
ashleymills | 0:714293de3836 | 694 | { |
ashleymills | 0:714293de3836 | 695 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 696 | fprintf(TraceFile, "\tClient SYN, Sequence Start:%u\n", seq); |
ashleymills | 0:714293de3836 | 697 | } |
ashleymills | 0:714293de3836 | 698 | } |
ashleymills | 0:714293de3836 | 699 | |
ashleymills | 0:714293de3836 | 700 | |
ashleymills | 0:714293de3836 | 701 | /* Show client FIN capture */ |
ashleymills | 0:714293de3836 | 702 | static void TraceClientFin(word32 finSeq, word32 relSeq) |
ashleymills | 0:714293de3836 | 703 | { |
ashleymills | 0:714293de3836 | 704 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 705 | fprintf(TraceFile, "\tClient FIN capture:%u, current SEQ:%u\n", |
ashleymills | 0:714293de3836 | 706 | finSeq, relSeq); |
ashleymills | 0:714293de3836 | 707 | } |
ashleymills | 0:714293de3836 | 708 | } |
ashleymills | 0:714293de3836 | 709 | |
ashleymills | 0:714293de3836 | 710 | |
ashleymills | 0:714293de3836 | 711 | /* Show server FIN capture */ |
ashleymills | 0:714293de3836 | 712 | static void TraceServerFin(word32 finSeq, word32 relSeq) |
ashleymills | 0:714293de3836 | 713 | { |
ashleymills | 0:714293de3836 | 714 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 715 | fprintf(TraceFile, "\tServer FIN capture:%u, current SEQ:%u\n", |
ashleymills | 0:714293de3836 | 716 | finSeq, relSeq); |
ashleymills | 0:714293de3836 | 717 | } |
ashleymills | 0:714293de3836 | 718 | } |
ashleymills | 0:714293de3836 | 719 | |
ashleymills | 0:714293de3836 | 720 | |
ashleymills | 0:714293de3836 | 721 | /* Show number of SSL data bytes decoded, could be 0 (ok) */ |
ashleymills | 0:714293de3836 | 722 | static void TraceGotData(int bytes) |
ashleymills | 0:714293de3836 | 723 | { |
ashleymills | 0:714293de3836 | 724 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 725 | fprintf(TraceFile, "\t%d bytes of SSL App data processed\n", bytes); |
ashleymills | 0:714293de3836 | 726 | } |
ashleymills | 0:714293de3836 | 727 | } |
ashleymills | 0:714293de3836 | 728 | |
ashleymills | 0:714293de3836 | 729 | |
ashleymills | 0:714293de3836 | 730 | /* Show bytes added to old SSL App data */ |
ashleymills | 0:714293de3836 | 731 | static void TraceAddedData(int newBytes, int existingBytes) |
ashleymills | 0:714293de3836 | 732 | { |
ashleymills | 0:714293de3836 | 733 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 734 | fprintf(TraceFile, |
ashleymills | 0:714293de3836 | 735 | "\t%d bytes added to %d exisiting bytes in User Buffer\n", |
ashleymills | 0:714293de3836 | 736 | newBytes, existingBytes); |
ashleymills | 0:714293de3836 | 737 | } |
ashleymills | 0:714293de3836 | 738 | } |
ashleymills | 0:714293de3836 | 739 | |
ashleymills | 0:714293de3836 | 740 | |
ashleymills | 0:714293de3836 | 741 | /* Show Stale Session */ |
ashleymills | 0:714293de3836 | 742 | static void TraceStaleSession(void) |
ashleymills | 0:714293de3836 | 743 | { |
ashleymills | 0:714293de3836 | 744 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 745 | fprintf(TraceFile, "\tFound a stale session\n"); |
ashleymills | 0:714293de3836 | 746 | } |
ashleymills | 0:714293de3836 | 747 | } |
ashleymills | 0:714293de3836 | 748 | |
ashleymills | 0:714293de3836 | 749 | |
ashleymills | 0:714293de3836 | 750 | /* Show Finding Stale Sessions */ |
ashleymills | 0:714293de3836 | 751 | static void TraceFindingStale(void) |
ashleymills | 0:714293de3836 | 752 | { |
ashleymills | 0:714293de3836 | 753 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 754 | fprintf(TraceFile, "\tTrying to find Stale Sessions\n"); |
ashleymills | 0:714293de3836 | 755 | } |
ashleymills | 0:714293de3836 | 756 | } |
ashleymills | 0:714293de3836 | 757 | |
ashleymills | 0:714293de3836 | 758 | |
ashleymills | 0:714293de3836 | 759 | /* Show Removed Session */ |
ashleymills | 0:714293de3836 | 760 | static void TraceRemovedSession(void) |
ashleymills | 0:714293de3836 | 761 | { |
ashleymills | 0:714293de3836 | 762 | if (TraceOn) { |
ashleymills | 0:714293de3836 | 763 | fprintf(TraceFile, "\tRemoved it\n"); |
ashleymills | 0:714293de3836 | 764 | } |
ashleymills | 0:714293de3836 | 765 | } |
ashleymills | 0:714293de3836 | 766 | |
ashleymills | 0:714293de3836 | 767 | |
ashleymills | 0:714293de3836 | 768 | /* Set user error string */ |
ashleymills | 0:714293de3836 | 769 | static void SetError(int idx, char* error, SnifferSession* session, int fatal) |
ashleymills | 0:714293de3836 | 770 | { |
ashleymills | 0:714293de3836 | 771 | GetError(idx, error); |
ashleymills | 0:714293de3836 | 772 | Trace(idx); |
ashleymills | 0:714293de3836 | 773 | if (session && fatal == FATAL_ERROR_STATE) |
ashleymills | 0:714293de3836 | 774 | session->flags.fatalError = 1; |
ashleymills | 0:714293de3836 | 775 | } |
ashleymills | 0:714293de3836 | 776 | |
ashleymills | 0:714293de3836 | 777 | |
ashleymills | 0:714293de3836 | 778 | /* See if this IPV4 network order address has been registered */ |
ashleymills | 0:714293de3836 | 779 | /* return 1 is true, 0 is false */ |
ashleymills | 0:714293de3836 | 780 | static int IsServerRegistered(word32 addr) |
ashleymills | 0:714293de3836 | 781 | { |
ashleymills | 0:714293de3836 | 782 | int ret = 0; /* false */ |
ashleymills | 0:714293de3836 | 783 | SnifferServer* sniffer; |
ashleymills | 0:714293de3836 | 784 | |
ashleymills | 0:714293de3836 | 785 | LockMutex(&ServerListMutex); |
ashleymills | 0:714293de3836 | 786 | |
ashleymills | 0:714293de3836 | 787 | sniffer = ServerList; |
ashleymills | 0:714293de3836 | 788 | while (sniffer) { |
ashleymills | 0:714293de3836 | 789 | if (sniffer->server == addr) { |
ashleymills | 0:714293de3836 | 790 | ret = 1; |
ashleymills | 0:714293de3836 | 791 | break; |
ashleymills | 0:714293de3836 | 792 | } |
ashleymills | 0:714293de3836 | 793 | sniffer = sniffer->next; |
ashleymills | 0:714293de3836 | 794 | } |
ashleymills | 0:714293de3836 | 795 | |
ashleymills | 0:714293de3836 | 796 | UnLockMutex(&ServerListMutex); |
ashleymills | 0:714293de3836 | 797 | |
ashleymills | 0:714293de3836 | 798 | return ret; |
ashleymills | 0:714293de3836 | 799 | } |
ashleymills | 0:714293de3836 | 800 | |
ashleymills | 0:714293de3836 | 801 | |
ashleymills | 0:714293de3836 | 802 | /* See if this port has been registered to watch */ |
ashleymills | 0:714293de3836 | 803 | /* return 1 is true, 0 is false */ |
ashleymills | 0:714293de3836 | 804 | static int IsPortRegistered(word32 port) |
ashleymills | 0:714293de3836 | 805 | { |
ashleymills | 0:714293de3836 | 806 | int ret = 0; /* false */ |
ashleymills | 0:714293de3836 | 807 | SnifferServer* sniffer; |
ashleymills | 0:714293de3836 | 808 | |
ashleymills | 0:714293de3836 | 809 | LockMutex(&ServerListMutex); |
ashleymills | 0:714293de3836 | 810 | |
ashleymills | 0:714293de3836 | 811 | sniffer = ServerList; |
ashleymills | 0:714293de3836 | 812 | while (sniffer) { |
ashleymills | 0:714293de3836 | 813 | if (sniffer->port == (int)port) { |
ashleymills | 0:714293de3836 | 814 | ret = 1; |
ashleymills | 0:714293de3836 | 815 | break; |
ashleymills | 0:714293de3836 | 816 | } |
ashleymills | 0:714293de3836 | 817 | sniffer = sniffer->next; |
ashleymills | 0:714293de3836 | 818 | } |
ashleymills | 0:714293de3836 | 819 | |
ashleymills | 0:714293de3836 | 820 | UnLockMutex(&ServerListMutex); |
ashleymills | 0:714293de3836 | 821 | |
ashleymills | 0:714293de3836 | 822 | return ret; |
ashleymills | 0:714293de3836 | 823 | } |
ashleymills | 0:714293de3836 | 824 | |
ashleymills | 0:714293de3836 | 825 | |
ashleymills | 0:714293de3836 | 826 | /* Get SnifferServer from IP and Port */ |
ashleymills | 0:714293de3836 | 827 | static SnifferServer* GetSnifferServer(IpInfo* ipInfo, TcpInfo* tcpInfo) |
ashleymills | 0:714293de3836 | 828 | { |
ashleymills | 0:714293de3836 | 829 | SnifferServer* sniffer; |
ashleymills | 0:714293de3836 | 830 | |
ashleymills | 0:714293de3836 | 831 | LockMutex(&ServerListMutex); |
ashleymills | 0:714293de3836 | 832 | |
ashleymills | 0:714293de3836 | 833 | sniffer = ServerList; |
ashleymills | 0:714293de3836 | 834 | while (sniffer) { |
ashleymills | 0:714293de3836 | 835 | if (sniffer->port == tcpInfo->srcPort && sniffer->server == ipInfo->src) |
ashleymills | 0:714293de3836 | 836 | break; |
ashleymills | 0:714293de3836 | 837 | if (sniffer->port == tcpInfo->dstPort && sniffer->server == ipInfo->dst) |
ashleymills | 0:714293de3836 | 838 | break; |
ashleymills | 0:714293de3836 | 839 | sniffer = sniffer->next; |
ashleymills | 0:714293de3836 | 840 | } |
ashleymills | 0:714293de3836 | 841 | |
ashleymills | 0:714293de3836 | 842 | UnLockMutex(&ServerListMutex); |
ashleymills | 0:714293de3836 | 843 | |
ashleymills | 0:714293de3836 | 844 | return sniffer; |
ashleymills | 0:714293de3836 | 845 | } |
ashleymills | 0:714293de3836 | 846 | |
ashleymills | 0:714293de3836 | 847 | |
ashleymills | 0:714293de3836 | 848 | /* Hash the Session Info, return hash row */ |
ashleymills | 0:714293de3836 | 849 | static word32 SessionHash(IpInfo* ipInfo, TcpInfo* tcpInfo) |
ashleymills | 0:714293de3836 | 850 | { |
ashleymills | 0:714293de3836 | 851 | word32 hash = ipInfo->src * ipInfo->dst; |
ashleymills | 0:714293de3836 | 852 | hash *= tcpInfo->srcPort * tcpInfo->dstPort; |
ashleymills | 0:714293de3836 | 853 | |
ashleymills | 0:714293de3836 | 854 | return hash % HASH_SIZE; |
ashleymills | 0:714293de3836 | 855 | } |
ashleymills | 0:714293de3836 | 856 | |
ashleymills | 0:714293de3836 | 857 | |
ashleymills | 0:714293de3836 | 858 | /* Get Exisiting SnifferSession from IP and Port */ |
ashleymills | 0:714293de3836 | 859 | static SnifferSession* GetSnifferSession(IpInfo* ipInfo, TcpInfo* tcpInfo) |
ashleymills | 0:714293de3836 | 860 | { |
ashleymills | 0:714293de3836 | 861 | SnifferSession* session; |
ashleymills | 0:714293de3836 | 862 | time_t currTime = time(NULL); |
ashleymills | 0:714293de3836 | 863 | word32 row = SessionHash(ipInfo, tcpInfo); |
ashleymills | 0:714293de3836 | 864 | |
ashleymills | 0:714293de3836 | 865 | assert(row <= HASH_SIZE); |
ashleymills | 0:714293de3836 | 866 | |
ashleymills | 0:714293de3836 | 867 | LockMutex(&SessionMutex); |
ashleymills | 0:714293de3836 | 868 | |
ashleymills | 0:714293de3836 | 869 | session = SessionTable[row]; |
ashleymills | 0:714293de3836 | 870 | while (session) { |
ashleymills | 0:714293de3836 | 871 | if (session->server == ipInfo->src && session->client == ipInfo->dst && |
ashleymills | 0:714293de3836 | 872 | session->srvPort == tcpInfo->srcPort && |
ashleymills | 0:714293de3836 | 873 | session->cliPort == tcpInfo->dstPort) |
ashleymills | 0:714293de3836 | 874 | break; |
ashleymills | 0:714293de3836 | 875 | if (session->client == ipInfo->src && session->server == ipInfo->dst && |
ashleymills | 0:714293de3836 | 876 | session->cliPort == tcpInfo->srcPort && |
ashleymills | 0:714293de3836 | 877 | session->srvPort == tcpInfo->dstPort) |
ashleymills | 0:714293de3836 | 878 | break; |
ashleymills | 0:714293de3836 | 879 | |
ashleymills | 0:714293de3836 | 880 | session = session->next; |
ashleymills | 0:714293de3836 | 881 | } |
ashleymills | 0:714293de3836 | 882 | |
ashleymills | 0:714293de3836 | 883 | if (session) |
ashleymills | 0:714293de3836 | 884 | session->lastUsed= currTime; /* keep session alive, remove stale will */ |
ashleymills | 0:714293de3836 | 885 | /* leave alone */ |
ashleymills | 0:714293de3836 | 886 | UnLockMutex(&SessionMutex); |
ashleymills | 0:714293de3836 | 887 | |
ashleymills | 0:714293de3836 | 888 | /* determine side */ |
ashleymills | 0:714293de3836 | 889 | if (session) { |
ashleymills | 0:714293de3836 | 890 | if (ipInfo->dst == session->context->server && |
ashleymills | 0:714293de3836 | 891 | tcpInfo->dstPort == session->context->port) |
ashleymills | 0:714293de3836 | 892 | session->flags.side = SERVER_END; |
ashleymills | 0:714293de3836 | 893 | else |
ashleymills | 0:714293de3836 | 894 | session->flags.side = CLIENT_END; |
ashleymills | 0:714293de3836 | 895 | } |
ashleymills | 0:714293de3836 | 896 | |
ashleymills | 0:714293de3836 | 897 | return session; |
ashleymills | 0:714293de3836 | 898 | } |
ashleymills | 0:714293de3836 | 899 | |
ashleymills | 0:714293de3836 | 900 | |
ashleymills | 0:714293de3836 | 901 | /* Sets the private key for a specific server and port */ |
ashleymills | 0:714293de3836 | 902 | /* returns 0 on success, -1 on error */ |
ashleymills | 0:714293de3836 | 903 | int ssl_SetPrivateKey(const char* serverAddress, int port, const char* keyFile, |
ashleymills | 0:714293de3836 | 904 | int typeKey, const char* password, char* error) |
ashleymills | 0:714293de3836 | 905 | { |
ashleymills | 0:714293de3836 | 906 | int ret; |
ashleymills | 0:714293de3836 | 907 | int type = (typeKey == FILETYPE_PEM) ? SSL_FILETYPE_PEM : |
ashleymills | 0:714293de3836 | 908 | SSL_FILETYPE_ASN1; |
ashleymills | 0:714293de3836 | 909 | SnifferServer* sniffer; |
ashleymills | 0:714293de3836 | 910 | |
ashleymills | 0:714293de3836 | 911 | TraceHeader(); |
ashleymills | 0:714293de3836 | 912 | TraceSetServer(serverAddress, port, keyFile); |
ashleymills | 0:714293de3836 | 913 | |
ashleymills | 0:714293de3836 | 914 | sniffer = (SnifferServer*)malloc(sizeof(SnifferServer)); |
ashleymills | 0:714293de3836 | 915 | if (sniffer == NULL) { |
ashleymills | 0:714293de3836 | 916 | SetError(MEMORY_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 917 | return -1; |
ashleymills | 0:714293de3836 | 918 | } |
ashleymills | 0:714293de3836 | 919 | InitSnifferServer(sniffer); |
ashleymills | 0:714293de3836 | 920 | |
ashleymills | 0:714293de3836 | 921 | XSTRNCPY(sniffer->address, serverAddress, MAX_SERVER_ADDRESS); |
ashleymills | 0:714293de3836 | 922 | sniffer->server = inet_addr(sniffer->address); |
ashleymills | 0:714293de3836 | 923 | sniffer->port = port; |
ashleymills | 0:714293de3836 | 924 | |
ashleymills | 0:714293de3836 | 925 | /* start in client mode since SSL_new needs a cert for server */ |
ashleymills | 0:714293de3836 | 926 | sniffer->ctx = SSL_CTX_new(SSLv3_client_method()); |
ashleymills | 0:714293de3836 | 927 | if (!sniffer->ctx) { |
ashleymills | 0:714293de3836 | 928 | SetError(MEMORY_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 929 | FreeSnifferServer(sniffer); |
ashleymills | 0:714293de3836 | 930 | return -1; |
ashleymills | 0:714293de3836 | 931 | } |
ashleymills | 0:714293de3836 | 932 | |
ashleymills | 0:714293de3836 | 933 | if (password){ |
ashleymills | 0:714293de3836 | 934 | SSL_CTX_set_default_passwd_cb(sniffer->ctx, SetPassword); |
ashleymills | 0:714293de3836 | 935 | SSL_CTX_set_default_passwd_cb_userdata(sniffer->ctx, (void*)password); |
ashleymills | 0:714293de3836 | 936 | } |
ashleymills | 0:714293de3836 | 937 | ret = SSL_CTX_use_PrivateKey_file(sniffer->ctx, keyFile, type); |
ashleymills | 0:714293de3836 | 938 | if (ret != SSL_SUCCESS) { |
ashleymills | 0:714293de3836 | 939 | SetError(KEY_FILE_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 940 | FreeSnifferServer(sniffer); |
ashleymills | 0:714293de3836 | 941 | return -1; |
ashleymills | 0:714293de3836 | 942 | } |
ashleymills | 0:714293de3836 | 943 | Trace(NEW_SERVER_STR); |
ashleymills | 0:714293de3836 | 944 | |
ashleymills | 0:714293de3836 | 945 | LockMutex(&ServerListMutex); |
ashleymills | 0:714293de3836 | 946 | |
ashleymills | 0:714293de3836 | 947 | sniffer->next = ServerList; |
ashleymills | 0:714293de3836 | 948 | ServerList = sniffer; |
ashleymills | 0:714293de3836 | 949 | |
ashleymills | 0:714293de3836 | 950 | UnLockMutex(&ServerListMutex); |
ashleymills | 0:714293de3836 | 951 | |
ashleymills | 0:714293de3836 | 952 | return 0; |
ashleymills | 0:714293de3836 | 953 | } |
ashleymills | 0:714293de3836 | 954 | |
ashleymills | 0:714293de3836 | 955 | |
ashleymills | 0:714293de3836 | 956 | /* Check IP Header for IPV4, TCP, and a registered server address */ |
ashleymills | 0:714293de3836 | 957 | /* returns 0 on success, -1 on error */ |
ashleymills | 0:714293de3836 | 958 | static int CheckIpHdr(IpHdr* iphdr, IpInfo* info, char* error) |
ashleymills | 0:714293de3836 | 959 | { |
ashleymills | 0:714293de3836 | 960 | int version = IP_V(iphdr); |
ashleymills | 0:714293de3836 | 961 | |
ashleymills | 0:714293de3836 | 962 | TraceIP(iphdr); |
ashleymills | 0:714293de3836 | 963 | Trace(IP_CHECK_STR); |
ashleymills | 0:714293de3836 | 964 | if (version != IPV4) { |
ashleymills | 0:714293de3836 | 965 | SetError(BAD_IPVER_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 966 | return -1; |
ashleymills | 0:714293de3836 | 967 | } |
ashleymills | 0:714293de3836 | 968 | |
ashleymills | 0:714293de3836 | 969 | if (iphdr->protocol != TCP_PROTOCOL) { |
ashleymills | 0:714293de3836 | 970 | SetError(BAD_PROTO_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 971 | return -1; |
ashleymills | 0:714293de3836 | 972 | } |
ashleymills | 0:714293de3836 | 973 | |
ashleymills | 0:714293de3836 | 974 | if (!IsServerRegistered(iphdr->src) && !IsServerRegistered(iphdr->dst)) { |
ashleymills | 0:714293de3836 | 975 | SetError(SERVER_NOT_REG_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 976 | return -1; |
ashleymills | 0:714293de3836 | 977 | } |
ashleymills | 0:714293de3836 | 978 | |
ashleymills | 0:714293de3836 | 979 | info->length = IP_HL(iphdr); |
ashleymills | 0:714293de3836 | 980 | info->total = ntohs(iphdr->length); |
ashleymills | 0:714293de3836 | 981 | info->src = iphdr->src; |
ashleymills | 0:714293de3836 | 982 | info->dst = iphdr->dst; |
ashleymills | 0:714293de3836 | 983 | |
ashleymills | 0:714293de3836 | 984 | return 0; |
ashleymills | 0:714293de3836 | 985 | } |
ashleymills | 0:714293de3836 | 986 | |
ashleymills | 0:714293de3836 | 987 | |
ashleymills | 0:714293de3836 | 988 | /* Check TCP Header for a registered port */ |
ashleymills | 0:714293de3836 | 989 | /* returns 0 on success, -1 on error */ |
ashleymills | 0:714293de3836 | 990 | static int CheckTcpHdr(TcpHdr* tcphdr, TcpInfo* info, char* error) |
ashleymills | 0:714293de3836 | 991 | { |
ashleymills | 0:714293de3836 | 992 | TraceTcp(tcphdr); |
ashleymills | 0:714293de3836 | 993 | Trace(TCP_CHECK_STR); |
ashleymills | 0:714293de3836 | 994 | info->srcPort = ntohs(tcphdr->srcPort); |
ashleymills | 0:714293de3836 | 995 | info->dstPort = ntohs(tcphdr->dstPort); |
ashleymills | 0:714293de3836 | 996 | info->length = TCP_LEN(tcphdr); |
ashleymills | 0:714293de3836 | 997 | info->sequence = ntohl(tcphdr->sequence); |
ashleymills | 0:714293de3836 | 998 | info->fin = tcphdr->flags & TCP_FIN; |
ashleymills | 0:714293de3836 | 999 | info->rst = tcphdr->flags & TCP_RST; |
ashleymills | 0:714293de3836 | 1000 | info->syn = tcphdr->flags & TCP_SYN; |
ashleymills | 0:714293de3836 | 1001 | info->ack = tcphdr->flags & TCP_ACK; |
ashleymills | 0:714293de3836 | 1002 | if (info->ack) |
ashleymills | 0:714293de3836 | 1003 | info->ackNumber = ntohl(tcphdr->ack); |
ashleymills | 0:714293de3836 | 1004 | |
ashleymills | 0:714293de3836 | 1005 | if (!IsPortRegistered(info->srcPort) && !IsPortRegistered(info->dstPort)) { |
ashleymills | 0:714293de3836 | 1006 | SetError(SERVER_PORT_NOT_REG_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 1007 | return -1; |
ashleymills | 0:714293de3836 | 1008 | } |
ashleymills | 0:714293de3836 | 1009 | |
ashleymills | 0:714293de3836 | 1010 | return 0; |
ashleymills | 0:714293de3836 | 1011 | } |
ashleymills | 0:714293de3836 | 1012 | |
ashleymills | 0:714293de3836 | 1013 | |
ashleymills | 0:714293de3836 | 1014 | /* Decode Record Layer Header */ |
ashleymills | 0:714293de3836 | 1015 | static int GetRecordHeader(const byte* input, RecordLayerHeader* rh, int* size) |
ashleymills | 0:714293de3836 | 1016 | { |
ashleymills | 0:714293de3836 | 1017 | XMEMCPY(rh, input, RECORD_HEADER_SZ); |
ashleymills | 0:714293de3836 | 1018 | *size = (rh->length[0] << 8) | rh->length[1]; |
ashleymills | 0:714293de3836 | 1019 | |
ashleymills | 0:714293de3836 | 1020 | if (*size > (MAX_RECORD_SIZE + COMP_EXTRA + MAX_MSG_EXTRA)) |
ashleymills | 0:714293de3836 | 1021 | return LENGTH_ERROR; |
ashleymills | 0:714293de3836 | 1022 | |
ashleymills | 0:714293de3836 | 1023 | return 0; |
ashleymills | 0:714293de3836 | 1024 | } |
ashleymills | 0:714293de3836 | 1025 | |
ashleymills | 0:714293de3836 | 1026 | |
ashleymills | 0:714293de3836 | 1027 | /* Process Client Key Exchange, RSA only */ |
ashleymills | 0:714293de3836 | 1028 | static int ProcessClientKeyExchange(const byte* input, int* sslBytes, |
ashleymills | 0:714293de3836 | 1029 | SnifferSession* session, char* error) |
ashleymills | 0:714293de3836 | 1030 | { |
ashleymills | 0:714293de3836 | 1031 | word32 idx = 0; |
ashleymills | 0:714293de3836 | 1032 | RsaKey key; |
ashleymills | 0:714293de3836 | 1033 | int ret; |
ashleymills | 0:714293de3836 | 1034 | |
ashleymills | 0:714293de3836 | 1035 | InitRsaKey(&key, 0); |
ashleymills | 0:714293de3836 | 1036 | |
ashleymills | 0:714293de3836 | 1037 | ret = RsaPrivateKeyDecode(session->context->ctx->privateKey.buffer, |
ashleymills | 0:714293de3836 | 1038 | &idx, &key, session->context->ctx->privateKey.length); |
ashleymills | 0:714293de3836 | 1039 | if (ret == 0) { |
ashleymills | 0:714293de3836 | 1040 | int length = RsaEncryptSize(&key); |
ashleymills | 0:714293de3836 | 1041 | |
ashleymills | 0:714293de3836 | 1042 | if (IsTLS(session->sslServer)) |
ashleymills | 0:714293de3836 | 1043 | input += 2; /* tls pre length */ |
ashleymills | 0:714293de3836 | 1044 | |
ashleymills | 0:714293de3836 | 1045 | if (length > *sslBytes) { |
ashleymills | 0:714293de3836 | 1046 | SetError(PARTIAL_INPUT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1047 | FreeRsaKey(&key); |
ashleymills | 0:714293de3836 | 1048 | return -1; |
ashleymills | 0:714293de3836 | 1049 | } |
ashleymills | 0:714293de3836 | 1050 | ret = RsaPrivateDecrypt(input, length, |
ashleymills | 0:714293de3836 | 1051 | session->sslServer->arrays->preMasterSecret,SECRET_LEN, &key); |
ashleymills | 0:714293de3836 | 1052 | |
ashleymills | 0:714293de3836 | 1053 | if (ret != SECRET_LEN) { |
ashleymills | 0:714293de3836 | 1054 | SetError(RSA_DECRYPT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1055 | FreeRsaKey(&key); |
ashleymills | 0:714293de3836 | 1056 | return -1; |
ashleymills | 0:714293de3836 | 1057 | } |
ashleymills | 0:714293de3836 | 1058 | ret = 0; /* not in error state */ |
ashleymills | 0:714293de3836 | 1059 | session->sslServer->arrays->preMasterSz = SECRET_LEN; |
ashleymills | 0:714293de3836 | 1060 | |
ashleymills | 0:714293de3836 | 1061 | /* store for client side as well */ |
ashleymills | 0:714293de3836 | 1062 | XMEMCPY(session->sslClient->arrays->preMasterSecret, |
ashleymills | 0:714293de3836 | 1063 | session->sslServer->arrays->preMasterSecret, SECRET_LEN); |
ashleymills | 0:714293de3836 | 1064 | session->sslClient->arrays->preMasterSz = SECRET_LEN; |
ashleymills | 0:714293de3836 | 1065 | |
ashleymills | 0:714293de3836 | 1066 | #ifdef SHOW_SECRETS |
ashleymills | 0:714293de3836 | 1067 | { |
ashleymills | 0:714293de3836 | 1068 | int i; |
ashleymills | 0:714293de3836 | 1069 | printf("pre master secret: "); |
ashleymills | 0:714293de3836 | 1070 | for (i = 0; i < SECRET_LEN; i++) |
ashleymills | 0:714293de3836 | 1071 | printf("%02x", session->sslServer->arrays->preMasterSecret[i]); |
ashleymills | 0:714293de3836 | 1072 | printf("\n"); |
ashleymills | 0:714293de3836 | 1073 | } |
ashleymills | 0:714293de3836 | 1074 | #endif |
ashleymills | 0:714293de3836 | 1075 | } |
ashleymills | 0:714293de3836 | 1076 | else { |
ashleymills | 0:714293de3836 | 1077 | SetError(RSA_DECODE_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1078 | FreeRsaKey(&key); |
ashleymills | 0:714293de3836 | 1079 | return -1; |
ashleymills | 0:714293de3836 | 1080 | } |
ashleymills | 0:714293de3836 | 1081 | |
ashleymills | 0:714293de3836 | 1082 | if (SetCipherSpecs(session->sslServer) != 0) { |
ashleymills | 0:714293de3836 | 1083 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1084 | FreeRsaKey(&key); |
ashleymills | 0:714293de3836 | 1085 | return -1; |
ashleymills | 0:714293de3836 | 1086 | } |
ashleymills | 0:714293de3836 | 1087 | |
ashleymills | 0:714293de3836 | 1088 | if (SetCipherSpecs(session->sslClient) != 0) { |
ashleymills | 0:714293de3836 | 1089 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1090 | FreeRsaKey(&key); |
ashleymills | 0:714293de3836 | 1091 | return -1; |
ashleymills | 0:714293de3836 | 1092 | } |
ashleymills | 0:714293de3836 | 1093 | |
ashleymills | 0:714293de3836 | 1094 | MakeMasterSecret(session->sslServer); |
ashleymills | 0:714293de3836 | 1095 | MakeMasterSecret(session->sslClient); |
ashleymills | 0:714293de3836 | 1096 | #ifdef SHOW_SECRETS |
ashleymills | 0:714293de3836 | 1097 | { |
ashleymills | 0:714293de3836 | 1098 | int i; |
ashleymills | 0:714293de3836 | 1099 | printf("server master secret: "); |
ashleymills | 0:714293de3836 | 1100 | for (i = 0; i < SECRET_LEN; i++) |
ashleymills | 0:714293de3836 | 1101 | printf("%02x", session->sslServer->arrays->masterSecret[i]); |
ashleymills | 0:714293de3836 | 1102 | printf("\n"); |
ashleymills | 0:714293de3836 | 1103 | |
ashleymills | 0:714293de3836 | 1104 | printf("client master secret: "); |
ashleymills | 0:714293de3836 | 1105 | for (i = 0; i < SECRET_LEN; i++) |
ashleymills | 0:714293de3836 | 1106 | printf("%02x", session->sslClient->arrays->masterSecret[i]); |
ashleymills | 0:714293de3836 | 1107 | printf("\n"); |
ashleymills | 0:714293de3836 | 1108 | |
ashleymills | 0:714293de3836 | 1109 | printf("server suite = %d\n", session->sslServer->options.cipherSuite); |
ashleymills | 0:714293de3836 | 1110 | printf("client suite = %d\n", session->sslClient->options.cipherSuite); |
ashleymills | 0:714293de3836 | 1111 | } |
ashleymills | 0:714293de3836 | 1112 | #endif |
ashleymills | 0:714293de3836 | 1113 | |
ashleymills | 0:714293de3836 | 1114 | FreeRsaKey(&key); |
ashleymills | 0:714293de3836 | 1115 | return ret; |
ashleymills | 0:714293de3836 | 1116 | } |
ashleymills | 0:714293de3836 | 1117 | |
ashleymills | 0:714293de3836 | 1118 | |
ashleymills | 0:714293de3836 | 1119 | /* Process Session Ticket */ |
ashleymills | 0:714293de3836 | 1120 | static int ProcessSessionTicket(const byte* input, int* sslBytes, |
ashleymills | 0:714293de3836 | 1121 | SnifferSession* session, char* error) |
ashleymills | 0:714293de3836 | 1122 | { |
ashleymills | 0:714293de3836 | 1123 | word16 len; |
ashleymills | 0:714293de3836 | 1124 | |
ashleymills | 0:714293de3836 | 1125 | /* make sure can read through hint and len */ |
ashleymills | 0:714293de3836 | 1126 | if (TICKET_HINT_LEN + LENGTH_SZ > *sslBytes) { |
ashleymills | 0:714293de3836 | 1127 | SetError(BAD_INPUT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1128 | return -1; |
ashleymills | 0:714293de3836 | 1129 | } |
ashleymills | 0:714293de3836 | 1130 | |
ashleymills | 0:714293de3836 | 1131 | input += TICKET_HINT_LEN; /* skip over hint */ |
ashleymills | 0:714293de3836 | 1132 | *sslBytes -= TICKET_HINT_LEN; |
ashleymills | 0:714293de3836 | 1133 | |
ashleymills | 0:714293de3836 | 1134 | len = (input[0] << 8) | input[1]; |
ashleymills | 0:714293de3836 | 1135 | input += LENGTH_SZ; |
ashleymills | 0:714293de3836 | 1136 | *sslBytes -= LENGTH_SZ; |
ashleymills | 0:714293de3836 | 1137 | |
ashleymills | 0:714293de3836 | 1138 | /* make sure can read through ticket */ |
ashleymills | 0:714293de3836 | 1139 | if (len > *sslBytes || len < ID_LEN) { |
ashleymills | 0:714293de3836 | 1140 | SetError(BAD_INPUT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1141 | return -1; |
ashleymills | 0:714293de3836 | 1142 | } |
ashleymills | 0:714293de3836 | 1143 | |
ashleymills | 0:714293de3836 | 1144 | /* store session with macID as sessionID */ |
ashleymills | 0:714293de3836 | 1145 | session->sslServer->options.haveSessionId = 1; |
ashleymills | 0:714293de3836 | 1146 | XMEMCPY(session->sslServer->arrays->sessionID, input + len - ID_LEN,ID_LEN); |
ashleymills | 0:714293de3836 | 1147 | |
ashleymills | 0:714293de3836 | 1148 | return 0; |
ashleymills | 0:714293de3836 | 1149 | } |
ashleymills | 0:714293de3836 | 1150 | |
ashleymills | 0:714293de3836 | 1151 | |
ashleymills | 0:714293de3836 | 1152 | /* Process Server Hello */ |
ashleymills | 0:714293de3836 | 1153 | static int ProcessServerHello(const byte* input, int* sslBytes, |
ashleymills | 0:714293de3836 | 1154 | SnifferSession* session, char* error) |
ashleymills | 0:714293de3836 | 1155 | { |
ashleymills | 0:714293de3836 | 1156 | ProtocolVersion pv; |
ashleymills | 0:714293de3836 | 1157 | byte b; |
ashleymills | 0:714293de3836 | 1158 | int toRead = VERSION_SZ + RAN_LEN + ENUM_LEN; |
ashleymills | 0:714293de3836 | 1159 | int doResume = 0; |
ashleymills | 0:714293de3836 | 1160 | |
ashleymills | 0:714293de3836 | 1161 | /* make sure we didn't miss ClientHello */ |
ashleymills | 0:714293de3836 | 1162 | if (session->flags.clientHello == 0) { |
ashleymills | 0:714293de3836 | 1163 | SetError(MISSED_CLIENT_HELLO_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1164 | return -1; |
ashleymills | 0:714293de3836 | 1165 | } |
ashleymills | 0:714293de3836 | 1166 | |
ashleymills | 0:714293de3836 | 1167 | /* make sure can read through session len */ |
ashleymills | 0:714293de3836 | 1168 | if (toRead > *sslBytes) { |
ashleymills | 0:714293de3836 | 1169 | SetError(SERVER_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1170 | return -1; |
ashleymills | 0:714293de3836 | 1171 | } |
ashleymills | 0:714293de3836 | 1172 | |
ashleymills | 0:714293de3836 | 1173 | XMEMCPY(&pv, input, VERSION_SZ); |
ashleymills | 0:714293de3836 | 1174 | input += VERSION_SZ; |
ashleymills | 0:714293de3836 | 1175 | *sslBytes -= VERSION_SZ; |
ashleymills | 0:714293de3836 | 1176 | |
ashleymills | 0:714293de3836 | 1177 | session->sslServer->version = pv; |
ashleymills | 0:714293de3836 | 1178 | session->sslClient->version = pv; |
ashleymills | 0:714293de3836 | 1179 | |
ashleymills | 0:714293de3836 | 1180 | XMEMCPY(session->sslServer->arrays->serverRandom, input, RAN_LEN); |
ashleymills | 0:714293de3836 | 1181 | XMEMCPY(session->sslClient->arrays->serverRandom, input, RAN_LEN); |
ashleymills | 0:714293de3836 | 1182 | input += RAN_LEN; |
ashleymills | 0:714293de3836 | 1183 | *sslBytes -= RAN_LEN; |
ashleymills | 0:714293de3836 | 1184 | |
ashleymills | 0:714293de3836 | 1185 | b = *input++; |
ashleymills | 0:714293de3836 | 1186 | *sslBytes -= 1; |
ashleymills | 0:714293de3836 | 1187 | |
ashleymills | 0:714293de3836 | 1188 | /* make sure can read through compression */ |
ashleymills | 0:714293de3836 | 1189 | if ( (b + SUITE_LEN + ENUM_LEN) > *sslBytes) { |
ashleymills | 0:714293de3836 | 1190 | SetError(SERVER_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1191 | return -1; |
ashleymills | 0:714293de3836 | 1192 | } |
ashleymills | 0:714293de3836 | 1193 | if (b) { |
ashleymills | 0:714293de3836 | 1194 | XMEMCPY(session->sslServer->arrays->sessionID, input, ID_LEN); |
ashleymills | 0:714293de3836 | 1195 | session->sslServer->options.haveSessionId = 1; |
ashleymills | 0:714293de3836 | 1196 | } |
ashleymills | 0:714293de3836 | 1197 | input += b; |
ashleymills | 0:714293de3836 | 1198 | *sslBytes -= b; |
ashleymills | 0:714293de3836 | 1199 | |
ashleymills | 0:714293de3836 | 1200 | /* cipher suite */ |
ashleymills | 0:714293de3836 | 1201 | b = *input++; /* first byte, ECC or not */ |
ashleymills | 0:714293de3836 | 1202 | session->sslServer->options.cipherSuite0 = b; |
ashleymills | 0:714293de3836 | 1203 | session->sslClient->options.cipherSuite0 = b; |
ashleymills | 0:714293de3836 | 1204 | b = *input++; |
ashleymills | 0:714293de3836 | 1205 | session->sslServer->options.cipherSuite = b; |
ashleymills | 0:714293de3836 | 1206 | session->sslClient->options.cipherSuite = b; |
ashleymills | 0:714293de3836 | 1207 | *sslBytes -= SUITE_LEN; |
ashleymills | 0:714293de3836 | 1208 | |
ashleymills | 0:714293de3836 | 1209 | /* compression */ |
ashleymills | 0:714293de3836 | 1210 | b = *input++; |
ashleymills | 0:714293de3836 | 1211 | *sslBytes -= ENUM_LEN; |
ashleymills | 0:714293de3836 | 1212 | |
ashleymills | 0:714293de3836 | 1213 | if (b) { |
ashleymills | 0:714293de3836 | 1214 | SetError(BAD_COMPRESSION_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1215 | return -1; |
ashleymills | 0:714293de3836 | 1216 | } |
ashleymills | 0:714293de3836 | 1217 | |
ashleymills | 0:714293de3836 | 1218 | if (session->sslServer->options.haveSessionId && |
ashleymills | 0:714293de3836 | 1219 | XMEMCMP(session->sslServer->arrays->sessionID, |
ashleymills | 0:714293de3836 | 1220 | session->sslClient->arrays->sessionID, ID_LEN) == 0) |
ashleymills | 0:714293de3836 | 1221 | doResume = 1; |
ashleymills | 0:714293de3836 | 1222 | else if (session->sslClient->options.haveSessionId == 0 && |
ashleymills | 0:714293de3836 | 1223 | session->sslServer->options.haveSessionId == 0 && |
ashleymills | 0:714293de3836 | 1224 | session->ticketID) |
ashleymills | 0:714293de3836 | 1225 | doResume = 1; |
ashleymills | 0:714293de3836 | 1226 | |
ashleymills | 0:714293de3836 | 1227 | if (session->ticketID && doResume) { |
ashleymills | 0:714293de3836 | 1228 | /* use ticketID to retrieve from session */ |
ashleymills | 0:714293de3836 | 1229 | XMEMCPY(session->sslServer->arrays->sessionID,session->ticketID,ID_LEN); |
ashleymills | 0:714293de3836 | 1230 | } |
ashleymills | 0:714293de3836 | 1231 | |
ashleymills | 0:714293de3836 | 1232 | if (doResume ) { |
ashleymills | 0:714293de3836 | 1233 | int ret = 0; |
ashleymills | 0:714293de3836 | 1234 | SSL_SESSION* resume = GetSession(session->sslServer, |
ashleymills | 0:714293de3836 | 1235 | session->sslServer->arrays->masterSecret); |
ashleymills | 0:714293de3836 | 1236 | if (resume == NULL) { |
ashleymills | 0:714293de3836 | 1237 | SetError(BAD_SESSION_RESUME_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1238 | return -1; |
ashleymills | 0:714293de3836 | 1239 | } |
ashleymills | 0:714293de3836 | 1240 | /* make sure client has master secret too */ |
ashleymills | 0:714293de3836 | 1241 | XMEMCPY(session->sslClient->arrays->masterSecret, |
ashleymills | 0:714293de3836 | 1242 | session->sslServer->arrays->masterSecret, SECRET_LEN); |
ashleymills | 0:714293de3836 | 1243 | session->flags.resuming = 1; |
ashleymills | 0:714293de3836 | 1244 | |
ashleymills | 0:714293de3836 | 1245 | Trace(SERVER_DID_RESUMPTION_STR); |
ashleymills | 0:714293de3836 | 1246 | if (SetCipherSpecs(session->sslServer) != 0) { |
ashleymills | 0:714293de3836 | 1247 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1248 | return -1; |
ashleymills | 0:714293de3836 | 1249 | } |
ashleymills | 0:714293de3836 | 1250 | |
ashleymills | 0:714293de3836 | 1251 | if (SetCipherSpecs(session->sslClient) != 0) { |
ashleymills | 0:714293de3836 | 1252 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1253 | return -1; |
ashleymills | 0:714293de3836 | 1254 | } |
ashleymills | 0:714293de3836 | 1255 | |
ashleymills | 0:714293de3836 | 1256 | if (session->sslServer->options.tls) { |
ashleymills | 0:714293de3836 | 1257 | ret = DeriveTlsKeys(session->sslServer); |
ashleymills | 0:714293de3836 | 1258 | ret += DeriveTlsKeys(session->sslClient); |
ashleymills | 0:714293de3836 | 1259 | } |
ashleymills | 0:714293de3836 | 1260 | else { |
ashleymills | 0:714293de3836 | 1261 | ret = DeriveKeys(session->sslServer); |
ashleymills | 0:714293de3836 | 1262 | ret += DeriveKeys(session->sslClient); |
ashleymills | 0:714293de3836 | 1263 | } |
ashleymills | 0:714293de3836 | 1264 | if (ret != 0) { |
ashleymills | 0:714293de3836 | 1265 | SetError(BAD_DERIVE_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1266 | return -1; |
ashleymills | 0:714293de3836 | 1267 | } |
ashleymills | 0:714293de3836 | 1268 | } |
ashleymills | 0:714293de3836 | 1269 | #ifdef SHOW_SECRETS |
ashleymills | 0:714293de3836 | 1270 | { |
ashleymills | 0:714293de3836 | 1271 | int i; |
ashleymills | 0:714293de3836 | 1272 | printf("cipher suite = 0x%02x\n", |
ashleymills | 0:714293de3836 | 1273 | session->sslServer->options.cipherSuite); |
ashleymills | 0:714293de3836 | 1274 | printf("server random: "); |
ashleymills | 0:714293de3836 | 1275 | for (i = 0; i < RAN_LEN; i++) |
ashleymills | 0:714293de3836 | 1276 | printf("%02x", session->sslServer->arrays->serverRandom[i]); |
ashleymills | 0:714293de3836 | 1277 | printf("\n"); |
ashleymills | 0:714293de3836 | 1278 | } |
ashleymills | 0:714293de3836 | 1279 | #endif |
ashleymills | 0:714293de3836 | 1280 | return 0; |
ashleymills | 0:714293de3836 | 1281 | } |
ashleymills | 0:714293de3836 | 1282 | |
ashleymills | 0:714293de3836 | 1283 | |
ashleymills | 0:714293de3836 | 1284 | /* Process normal Client Hello */ |
ashleymills | 0:714293de3836 | 1285 | static int ProcessClientHello(const byte* input, int* sslBytes, |
ashleymills | 0:714293de3836 | 1286 | SnifferSession* session, char* error) |
ashleymills | 0:714293de3836 | 1287 | { |
ashleymills | 0:714293de3836 | 1288 | byte bLen; |
ashleymills | 0:714293de3836 | 1289 | word16 len; |
ashleymills | 0:714293de3836 | 1290 | int toRead = VERSION_SZ + RAN_LEN + ENUM_LEN; |
ashleymills | 0:714293de3836 | 1291 | |
ashleymills | 0:714293de3836 | 1292 | session->flags.clientHello = 1; /* don't process again */ |
ashleymills | 0:714293de3836 | 1293 | |
ashleymills | 0:714293de3836 | 1294 | /* make sure can read up to session len */ |
ashleymills | 0:714293de3836 | 1295 | if (toRead > *sslBytes) { |
ashleymills | 0:714293de3836 | 1296 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1297 | return -1; |
ashleymills | 0:714293de3836 | 1298 | } |
ashleymills | 0:714293de3836 | 1299 | |
ashleymills | 0:714293de3836 | 1300 | /* skip, get negotiated one from server hello */ |
ashleymills | 0:714293de3836 | 1301 | input += VERSION_SZ; |
ashleymills | 0:714293de3836 | 1302 | *sslBytes -= VERSION_SZ; |
ashleymills | 0:714293de3836 | 1303 | |
ashleymills | 0:714293de3836 | 1304 | XMEMCPY(session->sslServer->arrays->clientRandom, input, RAN_LEN); |
ashleymills | 0:714293de3836 | 1305 | XMEMCPY(session->sslClient->arrays->clientRandom, input, RAN_LEN); |
ashleymills | 0:714293de3836 | 1306 | |
ashleymills | 0:714293de3836 | 1307 | input += RAN_LEN; |
ashleymills | 0:714293de3836 | 1308 | *sslBytes -= RAN_LEN; |
ashleymills | 0:714293de3836 | 1309 | |
ashleymills | 0:714293de3836 | 1310 | /* store session in case trying to resume */ |
ashleymills | 0:714293de3836 | 1311 | bLen = *input++; |
ashleymills | 0:714293de3836 | 1312 | *sslBytes -= ENUM_LEN; |
ashleymills | 0:714293de3836 | 1313 | if (bLen) { |
ashleymills | 0:714293de3836 | 1314 | if (ID_LEN > *sslBytes) { |
ashleymills | 0:714293de3836 | 1315 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1316 | return -1; |
ashleymills | 0:714293de3836 | 1317 | } |
ashleymills | 0:714293de3836 | 1318 | Trace(CLIENT_RESUME_TRY_STR); |
ashleymills | 0:714293de3836 | 1319 | XMEMCPY(session->sslClient->arrays->sessionID, input, ID_LEN); |
ashleymills | 0:714293de3836 | 1320 | session->sslClient->options.haveSessionId = 1; |
ashleymills | 0:714293de3836 | 1321 | } |
ashleymills | 0:714293de3836 | 1322 | #ifdef SHOW_SECRETS |
ashleymills | 0:714293de3836 | 1323 | { |
ashleymills | 0:714293de3836 | 1324 | int i; |
ashleymills | 0:714293de3836 | 1325 | printf("client random: "); |
ashleymills | 0:714293de3836 | 1326 | for (i = 0; i < RAN_LEN; i++) |
ashleymills | 0:714293de3836 | 1327 | printf("%02x", session->sslServer->arrays->clientRandom[i]); |
ashleymills | 0:714293de3836 | 1328 | printf("\n"); |
ashleymills | 0:714293de3836 | 1329 | } |
ashleymills | 0:714293de3836 | 1330 | #endif |
ashleymills | 0:714293de3836 | 1331 | |
ashleymills | 0:714293de3836 | 1332 | input += bLen; |
ashleymills | 0:714293de3836 | 1333 | *sslBytes -= bLen; |
ashleymills | 0:714293de3836 | 1334 | |
ashleymills | 0:714293de3836 | 1335 | /* skip cipher suites */ |
ashleymills | 0:714293de3836 | 1336 | /* make sure can read len */ |
ashleymills | 0:714293de3836 | 1337 | if (SUITE_LEN > *sslBytes) { |
ashleymills | 0:714293de3836 | 1338 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1339 | return -1; |
ashleymills | 0:714293de3836 | 1340 | } |
ashleymills | 0:714293de3836 | 1341 | len = (input[0] << 8) | input[1]; |
ashleymills | 0:714293de3836 | 1342 | input += SUITE_LEN; |
ashleymills | 0:714293de3836 | 1343 | *sslBytes -= SUITE_LEN; |
ashleymills | 0:714293de3836 | 1344 | /* make sure can read suites + comp len */ |
ashleymills | 0:714293de3836 | 1345 | if (len + ENUM_LEN > *sslBytes) { |
ashleymills | 0:714293de3836 | 1346 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1347 | return -1; |
ashleymills | 0:714293de3836 | 1348 | } |
ashleymills | 0:714293de3836 | 1349 | input += len; |
ashleymills | 0:714293de3836 | 1350 | *sslBytes -= len; |
ashleymills | 0:714293de3836 | 1351 | |
ashleymills | 0:714293de3836 | 1352 | /* skip compression */ |
ashleymills | 0:714293de3836 | 1353 | bLen = *input++; |
ashleymills | 0:714293de3836 | 1354 | *sslBytes -= ENUM_LEN; |
ashleymills | 0:714293de3836 | 1355 | /* make sure can read len */ |
ashleymills | 0:714293de3836 | 1356 | if (bLen > *sslBytes) { |
ashleymills | 0:714293de3836 | 1357 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1358 | return -1; |
ashleymills | 0:714293de3836 | 1359 | } |
ashleymills | 0:714293de3836 | 1360 | input += bLen; |
ashleymills | 0:714293de3836 | 1361 | *sslBytes -= bLen; |
ashleymills | 0:714293de3836 | 1362 | |
ashleymills | 0:714293de3836 | 1363 | if (*sslBytes == 0) { |
ashleymills | 0:714293de3836 | 1364 | /* no extensions */ |
ashleymills | 0:714293de3836 | 1365 | return 0; |
ashleymills | 0:714293de3836 | 1366 | } |
ashleymills | 0:714293de3836 | 1367 | |
ashleymills | 0:714293de3836 | 1368 | /* skip extensions until session ticket */ |
ashleymills | 0:714293de3836 | 1369 | /* make sure can read len */ |
ashleymills | 0:714293de3836 | 1370 | if (SUITE_LEN > *sslBytes) { |
ashleymills | 0:714293de3836 | 1371 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1372 | return -1; |
ashleymills | 0:714293de3836 | 1373 | } |
ashleymills | 0:714293de3836 | 1374 | len = (input[0] << 8) | input[1]; |
ashleymills | 0:714293de3836 | 1375 | input += SUITE_LEN; |
ashleymills | 0:714293de3836 | 1376 | *sslBytes -= SUITE_LEN; |
ashleymills | 0:714293de3836 | 1377 | /* make sure can read through all extensions */ |
ashleymills | 0:714293de3836 | 1378 | if (len > *sslBytes) { |
ashleymills | 0:714293de3836 | 1379 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1380 | return -1; |
ashleymills | 0:714293de3836 | 1381 | } |
ashleymills | 0:714293de3836 | 1382 | |
ashleymills | 0:714293de3836 | 1383 | while (len > EXT_TYPE_SZ + LENGTH_SZ) { |
ashleymills | 0:714293de3836 | 1384 | byte extType[EXT_TYPE_SZ]; |
ashleymills | 0:714293de3836 | 1385 | word16 extLen; |
ashleymills | 0:714293de3836 | 1386 | |
ashleymills | 0:714293de3836 | 1387 | extType[0] = input[0]; |
ashleymills | 0:714293de3836 | 1388 | extType[1] = input[1]; |
ashleymills | 0:714293de3836 | 1389 | input += EXT_TYPE_SZ; |
ashleymills | 0:714293de3836 | 1390 | *sslBytes -= EXT_TYPE_SZ; |
ashleymills | 0:714293de3836 | 1391 | |
ashleymills | 0:714293de3836 | 1392 | extLen = (input[0] << 8) | input[1]; |
ashleymills | 0:714293de3836 | 1393 | input += LENGTH_SZ; |
ashleymills | 0:714293de3836 | 1394 | *sslBytes -= LENGTH_SZ; |
ashleymills | 0:714293de3836 | 1395 | |
ashleymills | 0:714293de3836 | 1396 | /* make sure can read through individual extension */ |
ashleymills | 0:714293de3836 | 1397 | if (extLen > *sslBytes) { |
ashleymills | 0:714293de3836 | 1398 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1399 | return -1; |
ashleymills | 0:714293de3836 | 1400 | } |
ashleymills | 0:714293de3836 | 1401 | |
ashleymills | 0:714293de3836 | 1402 | if (extType[0] == 0x00 && extType[1] == TICKET_EXT_ID) { |
ashleymills | 0:714293de3836 | 1403 | |
ashleymills | 0:714293de3836 | 1404 | /* make sure can read through ticket if there is a non blank one */ |
ashleymills | 0:714293de3836 | 1405 | if (extLen && extLen < ID_LEN) { |
ashleymills | 0:714293de3836 | 1406 | SetError(CLIENT_HELLO_INPUT_STR, error, session, |
ashleymills | 0:714293de3836 | 1407 | FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1408 | return -1; |
ashleymills | 0:714293de3836 | 1409 | } |
ashleymills | 0:714293de3836 | 1410 | |
ashleymills | 0:714293de3836 | 1411 | if (extLen) { |
ashleymills | 0:714293de3836 | 1412 | if (session->ticketID == 0) { |
ashleymills | 0:714293de3836 | 1413 | session->ticketID = (byte*)malloc(ID_LEN); |
ashleymills | 0:714293de3836 | 1414 | if (session->ticketID == 0) { |
ashleymills | 0:714293de3836 | 1415 | SetError(MEMORY_STR, error, session, |
ashleymills | 0:714293de3836 | 1416 | FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1417 | return -1; |
ashleymills | 0:714293de3836 | 1418 | } |
ashleymills | 0:714293de3836 | 1419 | } |
ashleymills | 0:714293de3836 | 1420 | XMEMCPY(session->ticketID, input + extLen - ID_LEN, ID_LEN); |
ashleymills | 0:714293de3836 | 1421 | } |
ashleymills | 0:714293de3836 | 1422 | } |
ashleymills | 0:714293de3836 | 1423 | |
ashleymills | 0:714293de3836 | 1424 | input += extLen; |
ashleymills | 0:714293de3836 | 1425 | *sslBytes -= extLen; |
ashleymills | 0:714293de3836 | 1426 | len -= extLen + EXT_TYPE_SZ + LENGTH_SZ; |
ashleymills | 0:714293de3836 | 1427 | } |
ashleymills | 0:714293de3836 | 1428 | |
ashleymills | 0:714293de3836 | 1429 | return 0; |
ashleymills | 0:714293de3836 | 1430 | } |
ashleymills | 0:714293de3836 | 1431 | |
ashleymills | 0:714293de3836 | 1432 | |
ashleymills | 0:714293de3836 | 1433 | /* Process Finished */ |
ashleymills | 0:714293de3836 | 1434 | static int ProcessFinished(const byte* input, int* sslBytes, |
ashleymills | 0:714293de3836 | 1435 | SnifferSession* session, char* error) |
ashleymills | 0:714293de3836 | 1436 | { |
ashleymills | 0:714293de3836 | 1437 | SSL* ssl; |
ashleymills | 0:714293de3836 | 1438 | word32 inOutIdx = 0; |
ashleymills | 0:714293de3836 | 1439 | int ret; |
ashleymills | 0:714293de3836 | 1440 | |
ashleymills | 0:714293de3836 | 1441 | if (session->flags.side == SERVER_END) |
ashleymills | 0:714293de3836 | 1442 | ssl = session->sslServer; |
ashleymills | 0:714293de3836 | 1443 | else |
ashleymills | 0:714293de3836 | 1444 | ssl = session->sslClient; |
ashleymills | 0:714293de3836 | 1445 | ret = DoFinished(ssl, input, &inOutIdx, SNIFF); |
ashleymills | 0:714293de3836 | 1446 | *sslBytes -= (int)inOutIdx; |
ashleymills | 0:714293de3836 | 1447 | |
ashleymills | 0:714293de3836 | 1448 | if (ret < 0) { |
ashleymills | 0:714293de3836 | 1449 | SetError(BAD_FINISHED_MSG, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1450 | return ret; |
ashleymills | 0:714293de3836 | 1451 | } |
ashleymills | 0:714293de3836 | 1452 | |
ashleymills | 0:714293de3836 | 1453 | if (ret == 0 && session->flags.cached == 0) { |
ashleymills | 0:714293de3836 | 1454 | if (session->sslServer->options.haveSessionId) { |
ashleymills | 0:714293de3836 | 1455 | CYASSL_SESSION* sess = GetSession(session->sslServer, NULL); |
ashleymills | 0:714293de3836 | 1456 | if (sess == NULL) |
ashleymills | 0:714293de3836 | 1457 | AddSession(session->sslServer); /* don't re add */ |
ashleymills | 0:714293de3836 | 1458 | session->flags.cached = 1; |
ashleymills | 0:714293de3836 | 1459 | } |
ashleymills | 0:714293de3836 | 1460 | } |
ashleymills | 0:714293de3836 | 1461 | |
ashleymills | 0:714293de3836 | 1462 | FreeHandshakeResources(ssl); |
ashleymills | 0:714293de3836 | 1463 | |
ashleymills | 0:714293de3836 | 1464 | return ret; |
ashleymills | 0:714293de3836 | 1465 | } |
ashleymills | 0:714293de3836 | 1466 | |
ashleymills | 0:714293de3836 | 1467 | |
ashleymills | 0:714293de3836 | 1468 | /* Process HandShake input */ |
ashleymills | 0:714293de3836 | 1469 | static int DoHandShake(const byte* input, int* sslBytes, |
ashleymills | 0:714293de3836 | 1470 | SnifferSession* session, char* error) |
ashleymills | 0:714293de3836 | 1471 | { |
ashleymills | 0:714293de3836 | 1472 | byte type; |
ashleymills | 0:714293de3836 | 1473 | int size; |
ashleymills | 0:714293de3836 | 1474 | int ret = 0; |
ashleymills | 0:714293de3836 | 1475 | |
ashleymills | 0:714293de3836 | 1476 | if (*sslBytes < HANDSHAKE_HEADER_SZ) { |
ashleymills | 0:714293de3836 | 1477 | SetError(HANDSHAKE_INPUT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1478 | return -1; |
ashleymills | 0:714293de3836 | 1479 | } |
ashleymills | 0:714293de3836 | 1480 | type = input[0]; |
ashleymills | 0:714293de3836 | 1481 | size = (input[1] << 16) | (input[2] << 8) | input[3]; |
ashleymills | 0:714293de3836 | 1482 | |
ashleymills | 0:714293de3836 | 1483 | input += HANDSHAKE_HEADER_SZ; |
ashleymills | 0:714293de3836 | 1484 | *sslBytes -= HANDSHAKE_HEADER_SZ; |
ashleymills | 0:714293de3836 | 1485 | |
ashleymills | 0:714293de3836 | 1486 | if (*sslBytes < size) { |
ashleymills | 0:714293de3836 | 1487 | SetError(HANDSHAKE_INPUT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1488 | return -1; |
ashleymills | 0:714293de3836 | 1489 | } |
ashleymills | 0:714293de3836 | 1490 | |
ashleymills | 0:714293de3836 | 1491 | switch (type) { |
ashleymills | 0:714293de3836 | 1492 | case hello_verify_request: |
ashleymills | 0:714293de3836 | 1493 | Trace(GOT_HELLO_VERIFY_STR); |
ashleymills | 0:714293de3836 | 1494 | break; |
ashleymills | 0:714293de3836 | 1495 | case hello_request: |
ashleymills | 0:714293de3836 | 1496 | Trace(GOT_HELLO_REQUEST_STR); |
ashleymills | 0:714293de3836 | 1497 | break; |
ashleymills | 0:714293de3836 | 1498 | case session_ticket: |
ashleymills | 0:714293de3836 | 1499 | Trace(GOT_SESSION_TICKET_STR); |
ashleymills | 0:714293de3836 | 1500 | ret = ProcessSessionTicket(input, sslBytes, session, error); |
ashleymills | 0:714293de3836 | 1501 | break; |
ashleymills | 0:714293de3836 | 1502 | case server_hello: |
ashleymills | 0:714293de3836 | 1503 | Trace(GOT_SERVER_HELLO_STR); |
ashleymills | 0:714293de3836 | 1504 | ret = ProcessServerHello(input, sslBytes, session, error); |
ashleymills | 0:714293de3836 | 1505 | break; |
ashleymills | 0:714293de3836 | 1506 | case certificate_request: |
ashleymills | 0:714293de3836 | 1507 | Trace(GOT_CERT_REQ_STR); |
ashleymills | 0:714293de3836 | 1508 | break; |
ashleymills | 0:714293de3836 | 1509 | case server_key_exchange: |
ashleymills | 0:714293de3836 | 1510 | Trace(GOT_SERVER_KEY_EX_STR); |
ashleymills | 0:714293de3836 | 1511 | /* can't know temp key passively */ |
ashleymills | 0:714293de3836 | 1512 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1513 | ret = -1; |
ashleymills | 0:714293de3836 | 1514 | break; |
ashleymills | 0:714293de3836 | 1515 | case certificate: |
ashleymills | 0:714293de3836 | 1516 | Trace(GOT_CERT_STR); |
ashleymills | 0:714293de3836 | 1517 | break; |
ashleymills | 0:714293de3836 | 1518 | case server_hello_done: |
ashleymills | 0:714293de3836 | 1519 | Trace(GOT_SERVER_HELLO_DONE_STR); |
ashleymills | 0:714293de3836 | 1520 | break; |
ashleymills | 0:714293de3836 | 1521 | case finished: |
ashleymills | 0:714293de3836 | 1522 | Trace(GOT_FINISHED_STR); |
ashleymills | 0:714293de3836 | 1523 | ret = ProcessFinished(input, sslBytes, session, error); |
ashleymills | 0:714293de3836 | 1524 | break; |
ashleymills | 0:714293de3836 | 1525 | case client_hello: |
ashleymills | 0:714293de3836 | 1526 | Trace(GOT_CLIENT_HELLO_STR); |
ashleymills | 0:714293de3836 | 1527 | ret = ProcessClientHello(input, sslBytes, session, error); |
ashleymills | 0:714293de3836 | 1528 | break; |
ashleymills | 0:714293de3836 | 1529 | case client_key_exchange: |
ashleymills | 0:714293de3836 | 1530 | Trace(GOT_CLIENT_KEY_EX_STR); |
ashleymills | 0:714293de3836 | 1531 | ret = ProcessClientKeyExchange(input, sslBytes, session, error); |
ashleymills | 0:714293de3836 | 1532 | break; |
ashleymills | 0:714293de3836 | 1533 | case certificate_verify: |
ashleymills | 0:714293de3836 | 1534 | Trace(GOT_CERT_VER_STR); |
ashleymills | 0:714293de3836 | 1535 | break; |
ashleymills | 0:714293de3836 | 1536 | default: |
ashleymills | 0:714293de3836 | 1537 | SetError(GOT_UNKNOWN_HANDSHAKE_STR, error, session, 0); |
ashleymills | 0:714293de3836 | 1538 | return -1; |
ashleymills | 0:714293de3836 | 1539 | } |
ashleymills | 0:714293de3836 | 1540 | |
ashleymills | 0:714293de3836 | 1541 | return ret; |
ashleymills | 0:714293de3836 | 1542 | } |
ashleymills | 0:714293de3836 | 1543 | |
ashleymills | 0:714293de3836 | 1544 | |
ashleymills | 0:714293de3836 | 1545 | /* Decrypt input into plain output */ |
ashleymills | 0:714293de3836 | 1546 | static void Decrypt(SSL* ssl, byte* output, const byte* input, word32 sz) |
ashleymills | 0:714293de3836 | 1547 | { |
ashleymills | 0:714293de3836 | 1548 | switch (ssl->specs.bulk_cipher_algorithm) { |
ashleymills | 0:714293de3836 | 1549 | #ifdef BUILD_ARC4 |
ashleymills | 0:714293de3836 | 1550 | case rc4: |
ashleymills | 0:714293de3836 | 1551 | Arc4Process(ssl->decrypt.arc4, output, input, sz); |
ashleymills | 0:714293de3836 | 1552 | break; |
ashleymills | 0:714293de3836 | 1553 | #endif |
ashleymills | 0:714293de3836 | 1554 | |
ashleymills | 0:714293de3836 | 1555 | #ifdef BUILD_DES3 |
ashleymills | 0:714293de3836 | 1556 | case triple_des: |
ashleymills | 0:714293de3836 | 1557 | Des3_CbcDecrypt(ssl->decrypt.des3, output, input, sz); |
ashleymills | 0:714293de3836 | 1558 | break; |
ashleymills | 0:714293de3836 | 1559 | #endif |
ashleymills | 0:714293de3836 | 1560 | |
ashleymills | 0:714293de3836 | 1561 | #ifdef BUILD_AES |
ashleymills | 0:714293de3836 | 1562 | case aes: |
ashleymills | 0:714293de3836 | 1563 | AesCbcDecrypt(ssl->decrypt.aes, output, input, sz); |
ashleymills | 0:714293de3836 | 1564 | break; |
ashleymills | 0:714293de3836 | 1565 | #endif |
ashleymills | 0:714293de3836 | 1566 | |
ashleymills | 0:714293de3836 | 1567 | #ifdef HAVE_HC128 |
ashleymills | 0:714293de3836 | 1568 | case hc128: |
ashleymills | 0:714293de3836 | 1569 | Hc128_Process(ssl->decrypt.hc128, output, input, sz); |
ashleymills | 0:714293de3836 | 1570 | break; |
ashleymills | 0:714293de3836 | 1571 | #endif |
ashleymills | 0:714293de3836 | 1572 | |
ashleymills | 0:714293de3836 | 1573 | #ifdef BUILD_RABBIT |
ashleymills | 0:714293de3836 | 1574 | case rabbit: |
ashleymills | 0:714293de3836 | 1575 | RabbitProcess(ssl->decrypt.rabbit, output, input, sz); |
ashleymills | 0:714293de3836 | 1576 | break; |
ashleymills | 0:714293de3836 | 1577 | #endif |
ashleymills | 0:714293de3836 | 1578 | |
ashleymills | 0:714293de3836 | 1579 | #ifdef HAVE_CAMELLIA |
ashleymills | 0:714293de3836 | 1580 | case camellia: |
ashleymills | 0:714293de3836 | 1581 | CamelliaCbcDecrypt(ssl->decrypt.cam, output, input, sz); |
ashleymills | 0:714293de3836 | 1582 | break; |
ashleymills | 0:714293de3836 | 1583 | #endif |
ashleymills | 0:714293de3836 | 1584 | |
ashleymills | 0:714293de3836 | 1585 | default: |
ashleymills | 0:714293de3836 | 1586 | Trace(BAD_DECRYPT_TYPE); |
ashleymills | 0:714293de3836 | 1587 | break; |
ashleymills | 0:714293de3836 | 1588 | } |
ashleymills | 0:714293de3836 | 1589 | } |
ashleymills | 0:714293de3836 | 1590 | |
ashleymills | 0:714293de3836 | 1591 | |
ashleymills | 0:714293de3836 | 1592 | /* Decrypt input message into output, adjust output steam if needed */ |
ashleymills | 0:714293de3836 | 1593 | static const byte* DecryptMessage(SSL* ssl, const byte* input, word32 sz, |
ashleymills | 0:714293de3836 | 1594 | byte* output) |
ashleymills | 0:714293de3836 | 1595 | { |
ashleymills | 0:714293de3836 | 1596 | Decrypt(ssl, output, input, sz); |
ashleymills | 0:714293de3836 | 1597 | ssl->keys.encryptSz = sz; |
ashleymills | 0:714293de3836 | 1598 | if (ssl->options.tls1_1 && ssl->specs.cipher_type == block) |
ashleymills | 0:714293de3836 | 1599 | return output + ssl->specs.block_size; /* go past TLSv1.1 IV */ |
ashleymills | 0:714293de3836 | 1600 | |
ashleymills | 0:714293de3836 | 1601 | return output; |
ashleymills | 0:714293de3836 | 1602 | } |
ashleymills | 0:714293de3836 | 1603 | |
ashleymills | 0:714293de3836 | 1604 | |
ashleymills | 0:714293de3836 | 1605 | /* remove session from table, use rowHint if no info (means we have a lock) */ |
ashleymills | 0:714293de3836 | 1606 | static void RemoveSession(SnifferSession* session, IpInfo* ipInfo, |
ashleymills | 0:714293de3836 | 1607 | TcpInfo* tcpInfo, word32 rowHint) |
ashleymills | 0:714293de3836 | 1608 | { |
ashleymills | 0:714293de3836 | 1609 | SnifferSession* previous = 0; |
ashleymills | 0:714293de3836 | 1610 | SnifferSession* current; |
ashleymills | 0:714293de3836 | 1611 | word32 row = rowHint; |
ashleymills | 0:714293de3836 | 1612 | int haveLock = 0; |
ashleymills | 0:714293de3836 | 1613 | |
ashleymills | 0:714293de3836 | 1614 | if (ipInfo && tcpInfo) |
ashleymills | 0:714293de3836 | 1615 | row = SessionHash(ipInfo, tcpInfo); |
ashleymills | 0:714293de3836 | 1616 | else |
ashleymills | 0:714293de3836 | 1617 | haveLock = 1; |
ashleymills | 0:714293de3836 | 1618 | |
ashleymills | 0:714293de3836 | 1619 | assert(row <= HASH_SIZE); |
ashleymills | 0:714293de3836 | 1620 | Trace(REMOVE_SESSION_STR); |
ashleymills | 0:714293de3836 | 1621 | |
ashleymills | 0:714293de3836 | 1622 | if (!haveLock) |
ashleymills | 0:714293de3836 | 1623 | LockMutex(&SessionMutex); |
ashleymills | 0:714293de3836 | 1624 | |
ashleymills | 0:714293de3836 | 1625 | current = SessionTable[row]; |
ashleymills | 0:714293de3836 | 1626 | |
ashleymills | 0:714293de3836 | 1627 | while (current) { |
ashleymills | 0:714293de3836 | 1628 | if (current == session) { |
ashleymills | 0:714293de3836 | 1629 | if (previous) |
ashleymills | 0:714293de3836 | 1630 | previous->next = current->next; |
ashleymills | 0:714293de3836 | 1631 | else |
ashleymills | 0:714293de3836 | 1632 | SessionTable[row] = current->next; |
ashleymills | 0:714293de3836 | 1633 | FreeSnifferSession(session); |
ashleymills | 0:714293de3836 | 1634 | TraceRemovedSession(); |
ashleymills | 0:714293de3836 | 1635 | break; |
ashleymills | 0:714293de3836 | 1636 | } |
ashleymills | 0:714293de3836 | 1637 | previous = current; |
ashleymills | 0:714293de3836 | 1638 | current = current->next; |
ashleymills | 0:714293de3836 | 1639 | } |
ashleymills | 0:714293de3836 | 1640 | |
ashleymills | 0:714293de3836 | 1641 | if (!haveLock) |
ashleymills | 0:714293de3836 | 1642 | UnLockMutex(&SessionMutex); |
ashleymills | 0:714293de3836 | 1643 | } |
ashleymills | 0:714293de3836 | 1644 | |
ashleymills | 0:714293de3836 | 1645 | |
ashleymills | 0:714293de3836 | 1646 | /* Remove stale sessions from the Session Table, have a lock */ |
ashleymills | 0:714293de3836 | 1647 | static void RemoveStaleSessions(void) |
ashleymills | 0:714293de3836 | 1648 | { |
ashleymills | 0:714293de3836 | 1649 | word32 i; |
ashleymills | 0:714293de3836 | 1650 | SnifferSession* session; |
ashleymills | 0:714293de3836 | 1651 | |
ashleymills | 0:714293de3836 | 1652 | for (i = 0; i < HASH_SIZE; i++) { |
ashleymills | 0:714293de3836 | 1653 | session = SessionTable[i]; |
ashleymills | 0:714293de3836 | 1654 | while (session) { |
ashleymills | 0:714293de3836 | 1655 | SnifferSession* next = session->next; |
ashleymills | 0:714293de3836 | 1656 | if (time(NULL) >= session->lastUsed + SNIFFER_TIMEOUT) { |
ashleymills | 0:714293de3836 | 1657 | TraceStaleSession(); |
ashleymills | 0:714293de3836 | 1658 | RemoveSession(session, NULL, NULL, i); |
ashleymills | 0:714293de3836 | 1659 | } |
ashleymills | 0:714293de3836 | 1660 | session = next; |
ashleymills | 0:714293de3836 | 1661 | } |
ashleymills | 0:714293de3836 | 1662 | } |
ashleymills | 0:714293de3836 | 1663 | } |
ashleymills | 0:714293de3836 | 1664 | |
ashleymills | 0:714293de3836 | 1665 | |
ashleymills | 0:714293de3836 | 1666 | /* Create a new Sniffer Session */ |
ashleymills | 0:714293de3836 | 1667 | static SnifferSession* CreateSession(IpInfo* ipInfo, TcpInfo* tcpInfo, |
ashleymills | 0:714293de3836 | 1668 | char* error) |
ashleymills | 0:714293de3836 | 1669 | { |
ashleymills | 0:714293de3836 | 1670 | SnifferSession* session = 0; |
ashleymills | 0:714293de3836 | 1671 | int row; |
ashleymills | 0:714293de3836 | 1672 | |
ashleymills | 0:714293de3836 | 1673 | Trace(NEW_SESSION_STR); |
ashleymills | 0:714293de3836 | 1674 | /* create a new one */ |
ashleymills | 0:714293de3836 | 1675 | session = (SnifferSession*)malloc(sizeof(SnifferSession)); |
ashleymills | 0:714293de3836 | 1676 | if (session == NULL) { |
ashleymills | 0:714293de3836 | 1677 | SetError(MEMORY_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 1678 | return 0; |
ashleymills | 0:714293de3836 | 1679 | } |
ashleymills | 0:714293de3836 | 1680 | InitSession(session); |
ashleymills | 0:714293de3836 | 1681 | session->server = ipInfo->dst; |
ashleymills | 0:714293de3836 | 1682 | session->client = ipInfo->src; |
ashleymills | 0:714293de3836 | 1683 | session->srvPort = tcpInfo->dstPort; |
ashleymills | 0:714293de3836 | 1684 | session->cliPort = tcpInfo->srcPort; |
ashleymills | 0:714293de3836 | 1685 | session->cliSeqStart = tcpInfo->sequence; |
ashleymills | 0:714293de3836 | 1686 | session->cliExpected = 1; /* relative */ |
ashleymills | 0:714293de3836 | 1687 | session->lastUsed= time(NULL); |
ashleymills | 0:714293de3836 | 1688 | |
ashleymills | 0:714293de3836 | 1689 | session->context = GetSnifferServer(ipInfo, tcpInfo); |
ashleymills | 0:714293de3836 | 1690 | if (session->context == NULL) { |
ashleymills | 0:714293de3836 | 1691 | SetError(SERVER_NOT_REG_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 1692 | free(session); |
ashleymills | 0:714293de3836 | 1693 | return 0; |
ashleymills | 0:714293de3836 | 1694 | } |
ashleymills | 0:714293de3836 | 1695 | |
ashleymills | 0:714293de3836 | 1696 | session->sslServer = SSL_new(session->context->ctx); |
ashleymills | 0:714293de3836 | 1697 | if (session->sslServer == NULL) { |
ashleymills | 0:714293de3836 | 1698 | SetError(BAD_NEW_SSL_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1699 | free(session); |
ashleymills | 0:714293de3836 | 1700 | return 0; |
ashleymills | 0:714293de3836 | 1701 | } |
ashleymills | 0:714293de3836 | 1702 | session->sslClient = SSL_new(session->context->ctx); |
ashleymills | 0:714293de3836 | 1703 | if (session->sslClient == NULL) { |
ashleymills | 0:714293de3836 | 1704 | SSL_free(session->sslServer); |
ashleymills | 0:714293de3836 | 1705 | session->sslServer = 0; |
ashleymills | 0:714293de3836 | 1706 | |
ashleymills | 0:714293de3836 | 1707 | SetError(BAD_NEW_SSL_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1708 | free(session); |
ashleymills | 0:714293de3836 | 1709 | return 0; |
ashleymills | 0:714293de3836 | 1710 | } |
ashleymills | 0:714293de3836 | 1711 | /* put server back into server mode */ |
ashleymills | 0:714293de3836 | 1712 | session->sslServer->options.side = SERVER_END; |
ashleymills | 0:714293de3836 | 1713 | |
ashleymills | 0:714293de3836 | 1714 | row = SessionHash(ipInfo, tcpInfo); |
ashleymills | 0:714293de3836 | 1715 | |
ashleymills | 0:714293de3836 | 1716 | /* add it to the session table */ |
ashleymills | 0:714293de3836 | 1717 | LockMutex(&SessionMutex); |
ashleymills | 0:714293de3836 | 1718 | |
ashleymills | 0:714293de3836 | 1719 | session->next = SessionTable[row]; |
ashleymills | 0:714293de3836 | 1720 | SessionTable[row] = session; |
ashleymills | 0:714293de3836 | 1721 | |
ashleymills | 0:714293de3836 | 1722 | SessionCount++; |
ashleymills | 0:714293de3836 | 1723 | |
ashleymills | 0:714293de3836 | 1724 | if ( (SessionCount % HASH_SIZE) == 0) { |
ashleymills | 0:714293de3836 | 1725 | TraceFindingStale(); |
ashleymills | 0:714293de3836 | 1726 | RemoveStaleSessions(); |
ashleymills | 0:714293de3836 | 1727 | } |
ashleymills | 0:714293de3836 | 1728 | |
ashleymills | 0:714293de3836 | 1729 | UnLockMutex(&SessionMutex); |
ashleymills | 0:714293de3836 | 1730 | |
ashleymills | 0:714293de3836 | 1731 | /* determine headed side */ |
ashleymills | 0:714293de3836 | 1732 | if (ipInfo->dst == session->context->server && |
ashleymills | 0:714293de3836 | 1733 | tcpInfo->dstPort == session->context->port) |
ashleymills | 0:714293de3836 | 1734 | session->flags.side = SERVER_END; |
ashleymills | 0:714293de3836 | 1735 | else |
ashleymills | 0:714293de3836 | 1736 | session->flags.side = CLIENT_END; |
ashleymills | 0:714293de3836 | 1737 | |
ashleymills | 0:714293de3836 | 1738 | return session; |
ashleymills | 0:714293de3836 | 1739 | } |
ashleymills | 0:714293de3836 | 1740 | |
ashleymills | 0:714293de3836 | 1741 | |
ashleymills | 0:714293de3836 | 1742 | /* Process Old Client Hello Input */ |
ashleymills | 0:714293de3836 | 1743 | static int DoOldHello(SnifferSession* session, const byte* sslFrame, |
ashleymills | 0:714293de3836 | 1744 | int* rhSize, int* sslBytes, char* error) |
ashleymills | 0:714293de3836 | 1745 | { |
ashleymills | 0:714293de3836 | 1746 | const byte* input = sslFrame; |
ashleymills | 0:714293de3836 | 1747 | byte b0, b1; |
ashleymills | 0:714293de3836 | 1748 | word32 idx = 0; |
ashleymills | 0:714293de3836 | 1749 | int ret; |
ashleymills | 0:714293de3836 | 1750 | |
ashleymills | 0:714293de3836 | 1751 | Trace(GOT_OLD_CLIENT_HELLO_STR); |
ashleymills | 0:714293de3836 | 1752 | session->flags.clientHello = 1; /* don't process again */ |
ashleymills | 0:714293de3836 | 1753 | b0 = *input++; |
ashleymills | 0:714293de3836 | 1754 | b1 = *input++; |
ashleymills | 0:714293de3836 | 1755 | *sslBytes -= 2; |
ashleymills | 0:714293de3836 | 1756 | *rhSize = ((b0 & 0x7f) << 8) | b1; |
ashleymills | 0:714293de3836 | 1757 | |
ashleymills | 0:714293de3836 | 1758 | if (*rhSize > *sslBytes) { |
ashleymills | 0:714293de3836 | 1759 | SetError(OLD_CLIENT_INPUT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1760 | return -1; |
ashleymills | 0:714293de3836 | 1761 | } |
ashleymills | 0:714293de3836 | 1762 | |
ashleymills | 0:714293de3836 | 1763 | ret = ProcessOldClientHello(session->sslServer, input, &idx, *sslBytes, |
ashleymills | 0:714293de3836 | 1764 | *rhSize); |
ashleymills | 0:714293de3836 | 1765 | if (ret < 0) { |
ashleymills | 0:714293de3836 | 1766 | SetError(BAD_OLD_CLIENT_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1767 | return -1; |
ashleymills | 0:714293de3836 | 1768 | } |
ashleymills | 0:714293de3836 | 1769 | |
ashleymills | 0:714293de3836 | 1770 | Trace(OLD_CLIENT_OK_STR); |
ashleymills | 0:714293de3836 | 1771 | XMEMCPY(session->sslClient->arrays->clientRandom, |
ashleymills | 0:714293de3836 | 1772 | session->sslServer->arrays->clientRandom, RAN_LEN); |
ashleymills | 0:714293de3836 | 1773 | |
ashleymills | 0:714293de3836 | 1774 | *sslBytes -= *rhSize; |
ashleymills | 0:714293de3836 | 1775 | return 0; |
ashleymills | 0:714293de3836 | 1776 | } |
ashleymills | 0:714293de3836 | 1777 | |
ashleymills | 0:714293de3836 | 1778 | |
ashleymills | 0:714293de3836 | 1779 | #if 0 |
ashleymills | 0:714293de3836 | 1780 | /* Calculate the TCP checksum, see RFC 1071 */ |
ashleymills | 0:714293de3836 | 1781 | /* return 0 for success, -1 on error */ |
ashleymills | 0:714293de3836 | 1782 | /* can be called from decode() with |
ashleymills | 0:714293de3836 | 1783 | TcpChecksum(&ipInfo, &tcpInfo, sslBytes, packet + ipInfo.length); |
ashleymills | 0:714293de3836 | 1784 | could also add a 64bit version if type available and using this |
ashleymills | 0:714293de3836 | 1785 | */ |
ashleymills | 0:714293de3836 | 1786 | int TcpChecksum(IpInfo* ipInfo, TcpInfo* tcpInfo, int dataLen, |
ashleymills | 0:714293de3836 | 1787 | const byte* packet) |
ashleymills | 0:714293de3836 | 1788 | { |
ashleymills | 0:714293de3836 | 1789 | TcpPseudoHdr pseudo; |
ashleymills | 0:714293de3836 | 1790 | int count = PSEUDO_HDR_SZ; |
ashleymills | 0:714293de3836 | 1791 | const word16* data = (word16*)&pseudo; |
ashleymills | 0:714293de3836 | 1792 | word32 sum = 0; |
ashleymills | 0:714293de3836 | 1793 | word16 checksum; |
ashleymills | 0:714293de3836 | 1794 | |
ashleymills | 0:714293de3836 | 1795 | pseudo.src = ipInfo->src; |
ashleymills | 0:714293de3836 | 1796 | pseudo.dst = ipInfo->dst; |
ashleymills | 0:714293de3836 | 1797 | pseudo.rsv = 0; |
ashleymills | 0:714293de3836 | 1798 | pseudo.protocol = TCP_PROTO; |
ashleymills | 0:714293de3836 | 1799 | pseudo.legnth = htons(tcpInfo->length + dataLen); |
ashleymills | 0:714293de3836 | 1800 | |
ashleymills | 0:714293de3836 | 1801 | /* pseudo header sum */ |
ashleymills | 0:714293de3836 | 1802 | while (count >= 2) { |
ashleymills | 0:714293de3836 | 1803 | sum += *data++; |
ashleymills | 0:714293de3836 | 1804 | count -= 2; |
ashleymills | 0:714293de3836 | 1805 | } |
ashleymills | 0:714293de3836 | 1806 | |
ashleymills | 0:714293de3836 | 1807 | count = tcpInfo->length + dataLen; |
ashleymills | 0:714293de3836 | 1808 | data = (word16*)packet; |
ashleymills | 0:714293de3836 | 1809 | |
ashleymills | 0:714293de3836 | 1810 | /* main sum */ |
ashleymills | 0:714293de3836 | 1811 | while (count > 1) { |
ashleymills | 0:714293de3836 | 1812 | sum += *data++; |
ashleymills | 0:714293de3836 | 1813 | count -=2; |
ashleymills | 0:714293de3836 | 1814 | } |
ashleymills | 0:714293de3836 | 1815 | |
ashleymills | 0:714293de3836 | 1816 | /* get left-over, if any */ |
ashleymills | 0:714293de3836 | 1817 | packet = (byte*)data; |
ashleymills | 0:714293de3836 | 1818 | if (count > 0) { |
ashleymills | 0:714293de3836 | 1819 | sum += *packet; |
ashleymills | 0:714293de3836 | 1820 | } |
ashleymills | 0:714293de3836 | 1821 | |
ashleymills | 0:714293de3836 | 1822 | /* fold 32bit sum into 16 bits */ |
ashleymills | 0:714293de3836 | 1823 | while (sum >> 16) |
ashleymills | 0:714293de3836 | 1824 | sum = (sum & 0xffff) + (sum >> 16); |
ashleymills | 0:714293de3836 | 1825 | |
ashleymills | 0:714293de3836 | 1826 | checksum = (word16)~sum; |
ashleymills | 0:714293de3836 | 1827 | /* checksum should now equal 0, since included already calcd checksum */ |
ashleymills | 0:714293de3836 | 1828 | /* field, but tcp checksum offloading could negate calculation */ |
ashleymills | 0:714293de3836 | 1829 | if (checksum == 0) |
ashleymills | 0:714293de3836 | 1830 | return 0; |
ashleymills | 0:714293de3836 | 1831 | return -1; |
ashleymills | 0:714293de3836 | 1832 | } |
ashleymills | 0:714293de3836 | 1833 | #endif |
ashleymills | 0:714293de3836 | 1834 | |
ashleymills | 0:714293de3836 | 1835 | |
ashleymills | 0:714293de3836 | 1836 | /* Check IP and TCP headers, set payload */ |
ashleymills | 0:714293de3836 | 1837 | /* returns 0 on success, -1 on error */ |
ashleymills | 0:714293de3836 | 1838 | static int CheckHeaders(IpInfo* ipInfo, TcpInfo* tcpInfo, const byte* packet, |
ashleymills | 0:714293de3836 | 1839 | int length, const byte** sslFrame, int* sslBytes, char* error) |
ashleymills | 0:714293de3836 | 1840 | { |
ashleymills | 0:714293de3836 | 1841 | TraceHeader(); |
ashleymills | 0:714293de3836 | 1842 | TracePacket(); |
ashleymills | 0:714293de3836 | 1843 | if (length < IP_HDR_SZ) { |
ashleymills | 0:714293de3836 | 1844 | SetError(PACKET_HDR_SHORT_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 1845 | return -1; |
ashleymills | 0:714293de3836 | 1846 | } |
ashleymills | 0:714293de3836 | 1847 | if (CheckIpHdr((IpHdr*)packet, ipInfo, error) != 0) |
ashleymills | 0:714293de3836 | 1848 | return -1; |
ashleymills | 0:714293de3836 | 1849 | |
ashleymills | 0:714293de3836 | 1850 | if (length < (ipInfo->length + TCP_HDR_SZ)) { |
ashleymills | 0:714293de3836 | 1851 | SetError(PACKET_HDR_SHORT_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 1852 | return -1; |
ashleymills | 0:714293de3836 | 1853 | } |
ashleymills | 0:714293de3836 | 1854 | if (CheckTcpHdr((TcpHdr*)(packet + ipInfo->length), tcpInfo, error) != 0) |
ashleymills | 0:714293de3836 | 1855 | return -1; |
ashleymills | 0:714293de3836 | 1856 | |
ashleymills | 0:714293de3836 | 1857 | *sslFrame = packet + ipInfo->length + tcpInfo->length; |
ashleymills | 0:714293de3836 | 1858 | if (*sslFrame > packet + length) { |
ashleymills | 0:714293de3836 | 1859 | SetError(PACKET_HDR_SHORT_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 1860 | return -1; |
ashleymills | 0:714293de3836 | 1861 | } |
ashleymills | 0:714293de3836 | 1862 | *sslBytes = (int)(packet + length - *sslFrame); |
ashleymills | 0:714293de3836 | 1863 | |
ashleymills | 0:714293de3836 | 1864 | return 0; |
ashleymills | 0:714293de3836 | 1865 | } |
ashleymills | 0:714293de3836 | 1866 | |
ashleymills | 0:714293de3836 | 1867 | |
ashleymills | 0:714293de3836 | 1868 | /* Create or Find existing session */ |
ashleymills | 0:714293de3836 | 1869 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */ |
ashleymills | 0:714293de3836 | 1870 | static int CheckSession(IpInfo* ipInfo, TcpInfo* tcpInfo, int sslBytes, |
ashleymills | 0:714293de3836 | 1871 | SnifferSession** session, char* error) |
ashleymills | 0:714293de3836 | 1872 | { |
ashleymills | 0:714293de3836 | 1873 | /* create a new SnifferSession on client SYN */ |
ashleymills | 0:714293de3836 | 1874 | if (tcpInfo->syn && !tcpInfo->ack) { |
ashleymills | 0:714293de3836 | 1875 | TraceClientSyn(tcpInfo->sequence); |
ashleymills | 0:714293de3836 | 1876 | *session = CreateSession(ipInfo, tcpInfo, error); |
ashleymills | 0:714293de3836 | 1877 | if (*session == NULL) { |
ashleymills | 0:714293de3836 | 1878 | *session = GetSnifferSession(ipInfo, tcpInfo); |
ashleymills | 0:714293de3836 | 1879 | /* already had exisiting, so OK */ |
ashleymills | 0:714293de3836 | 1880 | if (*session) |
ashleymills | 0:714293de3836 | 1881 | return 1; |
ashleymills | 0:714293de3836 | 1882 | |
ashleymills | 0:714293de3836 | 1883 | SetError(MEMORY_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 1884 | return -1; |
ashleymills | 0:714293de3836 | 1885 | } |
ashleymills | 0:714293de3836 | 1886 | return 1; |
ashleymills | 0:714293de3836 | 1887 | } |
ashleymills | 0:714293de3836 | 1888 | /* get existing sniffer session */ |
ashleymills | 0:714293de3836 | 1889 | else { |
ashleymills | 0:714293de3836 | 1890 | *session = GetSnifferSession(ipInfo, tcpInfo); |
ashleymills | 0:714293de3836 | 1891 | if (*session == NULL) { |
ashleymills | 0:714293de3836 | 1892 | /* don't worry about extraneous RST or duplicate FINs */ |
ashleymills | 0:714293de3836 | 1893 | if (tcpInfo->fin || tcpInfo->rst) |
ashleymills | 0:714293de3836 | 1894 | return 1; |
ashleymills | 0:714293de3836 | 1895 | /* don't worry about duplicate ACKs either */ |
ashleymills | 0:714293de3836 | 1896 | if (sslBytes == 0 && tcpInfo->ack) |
ashleymills | 0:714293de3836 | 1897 | return 1; |
ashleymills | 0:714293de3836 | 1898 | |
ashleymills | 0:714293de3836 | 1899 | SetError(BAD_SESSION_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 1900 | return -1; |
ashleymills | 0:714293de3836 | 1901 | } |
ashleymills | 0:714293de3836 | 1902 | } |
ashleymills | 0:714293de3836 | 1903 | return 0; |
ashleymills | 0:714293de3836 | 1904 | } |
ashleymills | 0:714293de3836 | 1905 | |
ashleymills | 0:714293de3836 | 1906 | |
ashleymills | 0:714293de3836 | 1907 | /* Create a Packet Buffer from *begin - end, adjust new *begin and bytesLeft */ |
ashleymills | 0:714293de3836 | 1908 | static PacketBuffer* CreateBuffer(word32* begin, word32 end, const byte* data, |
ashleymills | 0:714293de3836 | 1909 | int* bytesLeft) |
ashleymills | 0:714293de3836 | 1910 | { |
ashleymills | 0:714293de3836 | 1911 | PacketBuffer* pb; |
ashleymills | 0:714293de3836 | 1912 | |
ashleymills | 0:714293de3836 | 1913 | int added = end - *begin + 1; |
ashleymills | 0:714293de3836 | 1914 | assert(*begin <= end); |
ashleymills | 0:714293de3836 | 1915 | |
ashleymills | 0:714293de3836 | 1916 | pb = (PacketBuffer*)malloc(sizeof(PacketBuffer)); |
ashleymills | 0:714293de3836 | 1917 | if (pb == NULL) return NULL; |
ashleymills | 0:714293de3836 | 1918 | |
ashleymills | 0:714293de3836 | 1919 | pb->next = 0; |
ashleymills | 0:714293de3836 | 1920 | pb->begin = *begin; |
ashleymills | 0:714293de3836 | 1921 | pb->end = end; |
ashleymills | 0:714293de3836 | 1922 | pb->data = (byte*)malloc(added); |
ashleymills | 0:714293de3836 | 1923 | |
ashleymills | 0:714293de3836 | 1924 | if (pb->data == NULL) { |
ashleymills | 0:714293de3836 | 1925 | free(pb); |
ashleymills | 0:714293de3836 | 1926 | return NULL; |
ashleymills | 0:714293de3836 | 1927 | } |
ashleymills | 0:714293de3836 | 1928 | XMEMCPY(pb->data, data, added); |
ashleymills | 0:714293de3836 | 1929 | |
ashleymills | 0:714293de3836 | 1930 | *bytesLeft -= added; |
ashleymills | 0:714293de3836 | 1931 | *begin = pb->end + 1; |
ashleymills | 0:714293de3836 | 1932 | |
ashleymills | 0:714293de3836 | 1933 | return pb; |
ashleymills | 0:714293de3836 | 1934 | } |
ashleymills | 0:714293de3836 | 1935 | |
ashleymills | 0:714293de3836 | 1936 | |
ashleymills | 0:714293de3836 | 1937 | /* Add sslFrame to Reassembly List */ |
ashleymills | 0:714293de3836 | 1938 | /* returns 1 (end) on success, -1, on error */ |
ashleymills | 0:714293de3836 | 1939 | static int AddToReassembly(byte from, word32 seq, const byte* sslFrame, |
ashleymills | 0:714293de3836 | 1940 | int sslBytes, SnifferSession* session, char* error) |
ashleymills | 0:714293de3836 | 1941 | { |
ashleymills | 0:714293de3836 | 1942 | PacketBuffer* add; |
ashleymills | 0:714293de3836 | 1943 | PacketBuffer** front = (from == SERVER_END) ? &session->cliReassemblyList: |
ashleymills | 0:714293de3836 | 1944 | &session->srvReassemblyList; |
ashleymills | 0:714293de3836 | 1945 | PacketBuffer* curr = *front; |
ashleymills | 0:714293de3836 | 1946 | PacketBuffer* prev = curr; |
ashleymills | 0:714293de3836 | 1947 | |
ashleymills | 0:714293de3836 | 1948 | word32 startSeq = seq; |
ashleymills | 0:714293de3836 | 1949 | word32 added; |
ashleymills | 0:714293de3836 | 1950 | int bytesLeft = sslBytes; /* could be overlapping fragment */ |
ashleymills | 0:714293de3836 | 1951 | |
ashleymills | 0:714293de3836 | 1952 | /* if list is empty add full frame to front */ |
ashleymills | 0:714293de3836 | 1953 | if (!curr) { |
ashleymills | 0:714293de3836 | 1954 | add = CreateBuffer(&seq, seq + sslBytes - 1, sslFrame, &bytesLeft); |
ashleymills | 0:714293de3836 | 1955 | if (add == NULL) { |
ashleymills | 0:714293de3836 | 1956 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1957 | return -1; |
ashleymills | 0:714293de3836 | 1958 | } |
ashleymills | 0:714293de3836 | 1959 | *front = add; |
ashleymills | 0:714293de3836 | 1960 | return 1; |
ashleymills | 0:714293de3836 | 1961 | } |
ashleymills | 0:714293de3836 | 1962 | |
ashleymills | 0:714293de3836 | 1963 | /* add to front if before current front, up to next->begin */ |
ashleymills | 0:714293de3836 | 1964 | if (seq < curr->begin) { |
ashleymills | 0:714293de3836 | 1965 | word32 end = seq + sslBytes - 1; |
ashleymills | 0:714293de3836 | 1966 | |
ashleymills | 0:714293de3836 | 1967 | if (end >= curr->begin) |
ashleymills | 0:714293de3836 | 1968 | end = curr->begin - 1; |
ashleymills | 0:714293de3836 | 1969 | |
ashleymills | 0:714293de3836 | 1970 | add = CreateBuffer(&seq, end, sslFrame, &bytesLeft); |
ashleymills | 0:714293de3836 | 1971 | if (add == NULL) { |
ashleymills | 0:714293de3836 | 1972 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 1973 | return -1; |
ashleymills | 0:714293de3836 | 1974 | } |
ashleymills | 0:714293de3836 | 1975 | add->next = curr; |
ashleymills | 0:714293de3836 | 1976 | *front = add; |
ashleymills | 0:714293de3836 | 1977 | } |
ashleymills | 0:714293de3836 | 1978 | |
ashleymills | 0:714293de3836 | 1979 | /* while we have bytes left, try to find a gap to fill */ |
ashleymills | 0:714293de3836 | 1980 | while (bytesLeft > 0) { |
ashleymills | 0:714293de3836 | 1981 | /* get previous packet in list */ |
ashleymills | 0:714293de3836 | 1982 | while (curr && (seq >= curr->begin)) { |
ashleymills | 0:714293de3836 | 1983 | prev = curr; |
ashleymills | 0:714293de3836 | 1984 | curr = curr->next; |
ashleymills | 0:714293de3836 | 1985 | } |
ashleymills | 0:714293de3836 | 1986 | |
ashleymills | 0:714293de3836 | 1987 | /* don't add duplicate data */ |
ashleymills | 0:714293de3836 | 1988 | if (prev->end >= seq) { |
ashleymills | 0:714293de3836 | 1989 | if ( (seq + bytesLeft - 1) <= prev->end) |
ashleymills | 0:714293de3836 | 1990 | return 1; |
ashleymills | 0:714293de3836 | 1991 | seq = prev->end + 1; |
ashleymills | 0:714293de3836 | 1992 | bytesLeft = startSeq + sslBytes - seq; |
ashleymills | 0:714293de3836 | 1993 | } |
ashleymills | 0:714293de3836 | 1994 | |
ashleymills | 0:714293de3836 | 1995 | if (!curr) |
ashleymills | 0:714293de3836 | 1996 | /* we're at the end */ |
ashleymills | 0:714293de3836 | 1997 | added = bytesLeft; |
ashleymills | 0:714293de3836 | 1998 | else |
ashleymills | 0:714293de3836 | 1999 | /* we're in between two frames */ |
ashleymills | 0:714293de3836 | 2000 | added = min((word32)bytesLeft, curr->begin - seq); |
ashleymills | 0:714293de3836 | 2001 | |
ashleymills | 0:714293de3836 | 2002 | /* data already there */ |
ashleymills | 0:714293de3836 | 2003 | if (added == 0) |
ashleymills | 0:714293de3836 | 2004 | continue; |
ashleymills | 0:714293de3836 | 2005 | |
ashleymills | 0:714293de3836 | 2006 | add = CreateBuffer(&seq, seq + added - 1, &sslFrame[seq - startSeq], |
ashleymills | 0:714293de3836 | 2007 | &bytesLeft); |
ashleymills | 0:714293de3836 | 2008 | if (add == NULL) { |
ashleymills | 0:714293de3836 | 2009 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 2010 | return -1; |
ashleymills | 0:714293de3836 | 2011 | } |
ashleymills | 0:714293de3836 | 2012 | add->next = prev->next; |
ashleymills | 0:714293de3836 | 2013 | prev->next = add; |
ashleymills | 0:714293de3836 | 2014 | } |
ashleymills | 0:714293de3836 | 2015 | return 1; |
ashleymills | 0:714293de3836 | 2016 | } |
ashleymills | 0:714293de3836 | 2017 | |
ashleymills | 0:714293de3836 | 2018 | |
ashleymills | 0:714293de3836 | 2019 | /* Add out of order FIN capture */ |
ashleymills | 0:714293de3836 | 2020 | /* returns 1 for success (end) */ |
ashleymills | 0:714293de3836 | 2021 | static int AddFinCapture(SnifferSession* session, word32 sequence) |
ashleymills | 0:714293de3836 | 2022 | { |
ashleymills | 0:714293de3836 | 2023 | if (session->flags.side == SERVER_END) { |
ashleymills | 0:714293de3836 | 2024 | if (session->finCaputre.cliCounted == 0) |
ashleymills | 0:714293de3836 | 2025 | session->finCaputre.cliFinSeq = sequence; |
ashleymills | 0:714293de3836 | 2026 | } |
ashleymills | 0:714293de3836 | 2027 | else { |
ashleymills | 0:714293de3836 | 2028 | if (session->finCaputre.srvCounted == 0) |
ashleymills | 0:714293de3836 | 2029 | session->finCaputre.srvFinSeq = sequence; |
ashleymills | 0:714293de3836 | 2030 | } |
ashleymills | 0:714293de3836 | 2031 | return 1; |
ashleymills | 0:714293de3836 | 2032 | } |
ashleymills | 0:714293de3836 | 2033 | |
ashleymills | 0:714293de3836 | 2034 | |
ashleymills | 0:714293de3836 | 2035 | /* Adjust incoming sequence based on side */ |
ashleymills | 0:714293de3836 | 2036 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */ |
ashleymills | 0:714293de3836 | 2037 | static int AdjustSequence(TcpInfo* tcpInfo, SnifferSession* session, |
ashleymills | 0:714293de3836 | 2038 | int* sslBytes, const byte** sslFrame, char* error) |
ashleymills | 0:714293de3836 | 2039 | { |
ashleymills | 0:714293de3836 | 2040 | word32 seqStart = (session->flags.side == SERVER_END) ? |
ashleymills | 0:714293de3836 | 2041 | session->cliSeqStart :session->srvSeqStart; |
ashleymills | 0:714293de3836 | 2042 | word32 real = tcpInfo->sequence - seqStart; |
ashleymills | 0:714293de3836 | 2043 | word32* expected = (session->flags.side == SERVER_END) ? |
ashleymills | 0:714293de3836 | 2044 | &session->cliExpected : &session->srvExpected; |
ashleymills | 0:714293de3836 | 2045 | PacketBuffer* reassemblyList = (session->flags.side == SERVER_END) ? |
ashleymills | 0:714293de3836 | 2046 | session->cliReassemblyList : session->srvReassemblyList; |
ashleymills | 0:714293de3836 | 2047 | |
ashleymills | 0:714293de3836 | 2048 | /* handle rollover of sequence */ |
ashleymills | 0:714293de3836 | 2049 | if (tcpInfo->sequence < seqStart) |
ashleymills | 0:714293de3836 | 2050 | real = 0xffffffffU - seqStart + tcpInfo->sequence; |
ashleymills | 0:714293de3836 | 2051 | |
ashleymills | 0:714293de3836 | 2052 | TraceRelativeSequence(*expected, real); |
ashleymills | 0:714293de3836 | 2053 | |
ashleymills | 0:714293de3836 | 2054 | if (real < *expected) { |
ashleymills | 0:714293de3836 | 2055 | Trace(DUPLICATE_STR); |
ashleymills | 0:714293de3836 | 2056 | if (real + *sslBytes > *expected) { |
ashleymills | 0:714293de3836 | 2057 | int overlap = *expected - real; |
ashleymills | 0:714293de3836 | 2058 | Trace(OVERLAP_DUPLICATE_STR); |
ashleymills | 0:714293de3836 | 2059 | |
ashleymills | 0:714293de3836 | 2060 | /* adjust to expected, remove duplicate */ |
ashleymills | 0:714293de3836 | 2061 | *sslFrame += overlap; |
ashleymills | 0:714293de3836 | 2062 | *sslBytes -= overlap; |
ashleymills | 0:714293de3836 | 2063 | |
ashleymills | 0:714293de3836 | 2064 | if (reassemblyList) { |
ashleymills | 0:714293de3836 | 2065 | word32 newEnd = *expected + *sslBytes; |
ashleymills | 0:714293de3836 | 2066 | |
ashleymills | 0:714293de3836 | 2067 | if (newEnd > reassemblyList->begin) { |
ashleymills | 0:714293de3836 | 2068 | Trace(OVERLAP_REASSEMBLY_BEGIN_STR); |
ashleymills | 0:714293de3836 | 2069 | |
ashleymills | 0:714293de3836 | 2070 | /* remove bytes already on reassembly list */ |
ashleymills | 0:714293de3836 | 2071 | *sslBytes -= newEnd - reassemblyList->begin; |
ashleymills | 0:714293de3836 | 2072 | } |
ashleymills | 0:714293de3836 | 2073 | if (newEnd > reassemblyList->end) { |
ashleymills | 0:714293de3836 | 2074 | Trace(OVERLAP_REASSEMBLY_END_STR); |
ashleymills | 0:714293de3836 | 2075 | |
ashleymills | 0:714293de3836 | 2076 | /* may be past reassembly list end (could have more on list) |
ashleymills | 0:714293de3836 | 2077 | so try to add what's past the front->end */ |
ashleymills | 0:714293de3836 | 2078 | AddToReassembly(session->flags.side, reassemblyList->end +1, |
ashleymills | 0:714293de3836 | 2079 | *sslFrame + reassemblyList->end - *expected + 1, |
ashleymills | 0:714293de3836 | 2080 | newEnd - reassemblyList->end, session, error); |
ashleymills | 0:714293de3836 | 2081 | } |
ashleymills | 0:714293de3836 | 2082 | } |
ashleymills | 0:714293de3836 | 2083 | } |
ashleymills | 0:714293de3836 | 2084 | else |
ashleymills | 0:714293de3836 | 2085 | return 1; |
ashleymills | 0:714293de3836 | 2086 | } |
ashleymills | 0:714293de3836 | 2087 | else if (real > *expected) { |
ashleymills | 0:714293de3836 | 2088 | Trace(OUT_OF_ORDER_STR); |
ashleymills | 0:714293de3836 | 2089 | if (*sslBytes > 0) |
ashleymills | 0:714293de3836 | 2090 | return AddToReassembly(session->flags.side, real, *sslFrame, |
ashleymills | 0:714293de3836 | 2091 | *sslBytes, session, error); |
ashleymills | 0:714293de3836 | 2092 | else if (tcpInfo->fin) |
ashleymills | 0:714293de3836 | 2093 | return AddFinCapture(session, real); |
ashleymills | 0:714293de3836 | 2094 | } |
ashleymills | 0:714293de3836 | 2095 | /* got expected sequence */ |
ashleymills | 0:714293de3836 | 2096 | *expected += *sslBytes; |
ashleymills | 0:714293de3836 | 2097 | if (tcpInfo->fin) |
ashleymills | 0:714293de3836 | 2098 | *expected += 1; |
ashleymills | 0:714293de3836 | 2099 | |
ashleymills | 0:714293de3836 | 2100 | return 0; |
ashleymills | 0:714293de3836 | 2101 | } |
ashleymills | 0:714293de3836 | 2102 | |
ashleymills | 0:714293de3836 | 2103 | |
ashleymills | 0:714293de3836 | 2104 | /* Check latest ack number for missing packets |
ashleymills | 0:714293de3836 | 2105 | return 0 ok, <0 on error */ |
ashleymills | 0:714293de3836 | 2106 | static int CheckAck(TcpInfo* tcpInfo, SnifferSession* session) |
ashleymills | 0:714293de3836 | 2107 | { |
ashleymills | 0:714293de3836 | 2108 | if (tcpInfo->ack) { |
ashleymills | 0:714293de3836 | 2109 | word32 seqStart = (session->flags.side == SERVER_END) ? |
ashleymills | 0:714293de3836 | 2110 | session->srvSeqStart :session->cliSeqStart; |
ashleymills | 0:714293de3836 | 2111 | word32 real = tcpInfo->ackNumber - seqStart; |
ashleymills | 0:714293de3836 | 2112 | word32 expected = (session->flags.side == SERVER_END) ? |
ashleymills | 0:714293de3836 | 2113 | session->srvExpected : session->cliExpected; |
ashleymills | 0:714293de3836 | 2114 | |
ashleymills | 0:714293de3836 | 2115 | /* handle rollover of sequence */ |
ashleymills | 0:714293de3836 | 2116 | if (tcpInfo->ackNumber < seqStart) |
ashleymills | 0:714293de3836 | 2117 | real = 0xffffffffU - seqStart + tcpInfo->ackNumber; |
ashleymills | 0:714293de3836 | 2118 | |
ashleymills | 0:714293de3836 | 2119 | TraceAck(real, expected); |
ashleymills | 0:714293de3836 | 2120 | |
ashleymills | 0:714293de3836 | 2121 | if (real > expected) |
ashleymills | 0:714293de3836 | 2122 | return -1; /* we missed a packet, ACKing data we never saw */ |
ashleymills | 0:714293de3836 | 2123 | } |
ashleymills | 0:714293de3836 | 2124 | return 0; |
ashleymills | 0:714293de3836 | 2125 | } |
ashleymills | 0:714293de3836 | 2126 | |
ashleymills | 0:714293de3836 | 2127 | |
ashleymills | 0:714293de3836 | 2128 | /* Check TCP Sequence status */ |
ashleymills | 0:714293de3836 | 2129 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */ |
ashleymills | 0:714293de3836 | 2130 | static int CheckSequence(IpInfo* ipInfo, TcpInfo* tcpInfo, |
ashleymills | 0:714293de3836 | 2131 | SnifferSession* session, int* sslBytes, |
ashleymills | 0:714293de3836 | 2132 | const byte** sslFrame, char* error) |
ashleymills | 0:714293de3836 | 2133 | { |
ashleymills | 0:714293de3836 | 2134 | int actualLen; |
ashleymills | 0:714293de3836 | 2135 | |
ashleymills | 0:714293de3836 | 2136 | /* init SEQ from server to client */ |
ashleymills | 0:714293de3836 | 2137 | if (tcpInfo->syn && tcpInfo->ack) { |
ashleymills | 0:714293de3836 | 2138 | session->srvSeqStart = tcpInfo->sequence; |
ashleymills | 0:714293de3836 | 2139 | session->srvExpected = 1; |
ashleymills | 0:714293de3836 | 2140 | TraceServerSyn(tcpInfo->sequence); |
ashleymills | 0:714293de3836 | 2141 | return 1; |
ashleymills | 0:714293de3836 | 2142 | } |
ashleymills | 0:714293de3836 | 2143 | |
ashleymills | 0:714293de3836 | 2144 | /* adjust potential ethernet trailer */ |
ashleymills | 0:714293de3836 | 2145 | actualLen = ipInfo->total - ipInfo->length - tcpInfo->length; |
ashleymills | 0:714293de3836 | 2146 | if (*sslBytes > actualLen) { |
ashleymills | 0:714293de3836 | 2147 | *sslBytes = actualLen; |
ashleymills | 0:714293de3836 | 2148 | } |
ashleymills | 0:714293de3836 | 2149 | |
ashleymills | 0:714293de3836 | 2150 | TraceSequence(tcpInfo->sequence, *sslBytes); |
ashleymills | 0:714293de3836 | 2151 | if (CheckAck(tcpInfo, session) < 0) { |
ashleymills | 0:714293de3836 | 2152 | SetError(ACK_MISSED_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 2153 | return -1; |
ashleymills | 0:714293de3836 | 2154 | } |
ashleymills | 0:714293de3836 | 2155 | |
ashleymills | 0:714293de3836 | 2156 | return AdjustSequence(tcpInfo, session, sslBytes, sslFrame, error); |
ashleymills | 0:714293de3836 | 2157 | } |
ashleymills | 0:714293de3836 | 2158 | |
ashleymills | 0:714293de3836 | 2159 | |
ashleymills | 0:714293de3836 | 2160 | /* Check Status before record processing */ |
ashleymills | 0:714293de3836 | 2161 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */ |
ashleymills | 0:714293de3836 | 2162 | static int CheckPreRecord(IpInfo* ipInfo, TcpInfo* tcpInfo, |
ashleymills | 0:714293de3836 | 2163 | const byte** sslFrame, SnifferSession** session, |
ashleymills | 0:714293de3836 | 2164 | int* sslBytes, const byte** end, char* error) |
ashleymills | 0:714293de3836 | 2165 | { |
ashleymills | 0:714293de3836 | 2166 | word32 length; |
ashleymills | 0:714293de3836 | 2167 | SSL* ssl = ((*session)->flags.side == SERVER_END) ? (*session)->sslServer : |
ashleymills | 0:714293de3836 | 2168 | (*session)->sslClient; |
ashleymills | 0:714293de3836 | 2169 | /* remove SnifferSession on 2nd FIN or RST */ |
ashleymills | 0:714293de3836 | 2170 | if (tcpInfo->fin || tcpInfo->rst) { |
ashleymills | 0:714293de3836 | 2171 | /* flag FIN and RST */ |
ashleymills | 0:714293de3836 | 2172 | if (tcpInfo->fin) |
ashleymills | 0:714293de3836 | 2173 | (*session)->flags.finCount += 1; |
ashleymills | 0:714293de3836 | 2174 | else if (tcpInfo->rst) |
ashleymills | 0:714293de3836 | 2175 | (*session)->flags.finCount += 2; |
ashleymills | 0:714293de3836 | 2176 | |
ashleymills | 0:714293de3836 | 2177 | if ((*session)->flags.finCount >= 2) { |
ashleymills | 0:714293de3836 | 2178 | RemoveSession(*session, ipInfo, tcpInfo, 0); |
ashleymills | 0:714293de3836 | 2179 | *session = NULL; |
ashleymills | 0:714293de3836 | 2180 | return 1; |
ashleymills | 0:714293de3836 | 2181 | } |
ashleymills | 0:714293de3836 | 2182 | } |
ashleymills | 0:714293de3836 | 2183 | |
ashleymills | 0:714293de3836 | 2184 | if ((*session)->flags.fatalError == FATAL_ERROR_STATE) { |
ashleymills | 0:714293de3836 | 2185 | SetError(FATAL_ERROR_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 2186 | return -1; |
ashleymills | 0:714293de3836 | 2187 | } |
ashleymills | 0:714293de3836 | 2188 | |
ashleymills | 0:714293de3836 | 2189 | if (*sslBytes == 0) { |
ashleymills | 0:714293de3836 | 2190 | Trace(NO_DATA_STR); |
ashleymills | 0:714293de3836 | 2191 | return 1; |
ashleymills | 0:714293de3836 | 2192 | } |
ashleymills | 0:714293de3836 | 2193 | |
ashleymills | 0:714293de3836 | 2194 | /* if current partial data, add to end of partial */ |
ashleymills | 0:714293de3836 | 2195 | if ( (length = ssl->buffers.inputBuffer.length) ) { |
ashleymills | 0:714293de3836 | 2196 | Trace(PARTIAL_ADD_STR); |
ashleymills | 0:714293de3836 | 2197 | |
ashleymills | 0:714293de3836 | 2198 | if ( (*sslBytes + length) > ssl->buffers.inputBuffer.bufferSize) { |
ashleymills | 0:714293de3836 | 2199 | if (GrowInputBuffer(ssl, *sslBytes, length) < 0) { |
ashleymills | 0:714293de3836 | 2200 | SetError(MEMORY_STR, error, *session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 2201 | return -1; |
ashleymills | 0:714293de3836 | 2202 | } |
ashleymills | 0:714293de3836 | 2203 | } |
ashleymills | 0:714293de3836 | 2204 | XMEMCPY(&ssl->buffers.inputBuffer.buffer[length], *sslFrame, *sslBytes); |
ashleymills | 0:714293de3836 | 2205 | *sslBytes += length; |
ashleymills | 0:714293de3836 | 2206 | ssl->buffers.inputBuffer.length = *sslBytes; |
ashleymills | 0:714293de3836 | 2207 | *sslFrame = ssl->buffers.inputBuffer.buffer; |
ashleymills | 0:714293de3836 | 2208 | *end = *sslFrame + *sslBytes; |
ashleymills | 0:714293de3836 | 2209 | } |
ashleymills | 0:714293de3836 | 2210 | |
ashleymills | 0:714293de3836 | 2211 | if ((*session)->flags.clientHello == 0 && **sslFrame != handshake) { |
ashleymills | 0:714293de3836 | 2212 | int rhSize; |
ashleymills | 0:714293de3836 | 2213 | int ret = DoOldHello(*session, *sslFrame, &rhSize, sslBytes, error); |
ashleymills | 0:714293de3836 | 2214 | if (ret < 0) |
ashleymills | 0:714293de3836 | 2215 | return -1; /* error already set */ |
ashleymills | 0:714293de3836 | 2216 | if (*sslBytes <= 0) |
ashleymills | 0:714293de3836 | 2217 | return 1; |
ashleymills | 0:714293de3836 | 2218 | } |
ashleymills | 0:714293de3836 | 2219 | |
ashleymills | 0:714293de3836 | 2220 | return 0; |
ashleymills | 0:714293de3836 | 2221 | } |
ashleymills | 0:714293de3836 | 2222 | |
ashleymills | 0:714293de3836 | 2223 | |
ashleymills | 0:714293de3836 | 2224 | /* See if input on the reassembly list is ready for consuming */ |
ashleymills | 0:714293de3836 | 2225 | /* returns 1 for TRUE, 0 for FALSE */ |
ashleymills | 0:714293de3836 | 2226 | static int HaveMoreInput(SnifferSession* session, const byte** sslFrame, |
ashleymills | 0:714293de3836 | 2227 | int* sslBytes, const byte** end, char* error) |
ashleymills | 0:714293de3836 | 2228 | { |
ashleymills | 0:714293de3836 | 2229 | /* sequence and reassembly based on from, not to */ |
ashleymills | 0:714293de3836 | 2230 | int moreInput = 0; |
ashleymills | 0:714293de3836 | 2231 | PacketBuffer** front = (session->flags.side == SERVER_END) ? |
ashleymills | 0:714293de3836 | 2232 | &session->cliReassemblyList : &session->srvReassemblyList; |
ashleymills | 0:714293de3836 | 2233 | word32* expected = (session->flags.side == SERVER_END) ? |
ashleymills | 0:714293de3836 | 2234 | &session->cliExpected : &session->srvExpected; |
ashleymills | 0:714293de3836 | 2235 | /* buffer is on receiving end */ |
ashleymills | 0:714293de3836 | 2236 | word32* length = (session->flags.side == SERVER_END) ? |
ashleymills | 0:714293de3836 | 2237 | &session->sslServer->buffers.inputBuffer.length : |
ashleymills | 0:714293de3836 | 2238 | &session->sslClient->buffers.inputBuffer.length; |
ashleymills | 0:714293de3836 | 2239 | byte* myBuffer = (session->flags.side == SERVER_END) ? |
ashleymills | 0:714293de3836 | 2240 | session->sslServer->buffers.inputBuffer.buffer : |
ashleymills | 0:714293de3836 | 2241 | session->sslClient->buffers.inputBuffer.buffer; |
ashleymills | 0:714293de3836 | 2242 | word32 bufferSize = (session->flags.side == SERVER_END) ? |
ashleymills | 0:714293de3836 | 2243 | session->sslServer->buffers.inputBuffer.bufferSize : |
ashleymills | 0:714293de3836 | 2244 | session->sslClient->buffers.inputBuffer.bufferSize; |
ashleymills | 0:714293de3836 | 2245 | SSL* ssl = (session->flags.side == SERVER_END) ? |
ashleymills | 0:714293de3836 | 2246 | session->sslServer : session->sslClient; |
ashleymills | 0:714293de3836 | 2247 | |
ashleymills | 0:714293de3836 | 2248 | while (*front && ((*front)->begin == *expected) ) { |
ashleymills | 0:714293de3836 | 2249 | word32 room = bufferSize - *length; |
ashleymills | 0:714293de3836 | 2250 | word32 packetLen = (*front)->end - (*front)->begin + 1; |
ashleymills | 0:714293de3836 | 2251 | |
ashleymills | 0:714293de3836 | 2252 | if (packetLen > room && bufferSize < MAX_INPUT_SZ) { |
ashleymills | 0:714293de3836 | 2253 | if (GrowInputBuffer(ssl, packetLen, *length) < 0) { |
ashleymills | 0:714293de3836 | 2254 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 2255 | return 0; |
ashleymills | 0:714293de3836 | 2256 | } |
ashleymills | 0:714293de3836 | 2257 | } |
ashleymills | 0:714293de3836 | 2258 | |
ashleymills | 0:714293de3836 | 2259 | if (packetLen <= room) { |
ashleymills | 0:714293de3836 | 2260 | PacketBuffer* del = *front; |
ashleymills | 0:714293de3836 | 2261 | |
ashleymills | 0:714293de3836 | 2262 | XMEMCPY(&myBuffer[*length], (*front)->data, packetLen); |
ashleymills | 0:714293de3836 | 2263 | *length += packetLen; |
ashleymills | 0:714293de3836 | 2264 | *expected += packetLen; |
ashleymills | 0:714293de3836 | 2265 | |
ashleymills | 0:714293de3836 | 2266 | /* remove used packet */ |
ashleymills | 0:714293de3836 | 2267 | *front = (*front)->next; |
ashleymills | 0:714293de3836 | 2268 | FreePacketBuffer(del); |
ashleymills | 0:714293de3836 | 2269 | |
ashleymills | 0:714293de3836 | 2270 | moreInput = 1; |
ashleymills | 0:714293de3836 | 2271 | } |
ashleymills | 0:714293de3836 | 2272 | else |
ashleymills | 0:714293de3836 | 2273 | break; |
ashleymills | 0:714293de3836 | 2274 | } |
ashleymills | 0:714293de3836 | 2275 | if (moreInput) { |
ashleymills | 0:714293de3836 | 2276 | *sslFrame = myBuffer; |
ashleymills | 0:714293de3836 | 2277 | *sslBytes = *length; |
ashleymills | 0:714293de3836 | 2278 | *end = myBuffer + *length; |
ashleymills | 0:714293de3836 | 2279 | } |
ashleymills | 0:714293de3836 | 2280 | return moreInput; |
ashleymills | 0:714293de3836 | 2281 | } |
ashleymills | 0:714293de3836 | 2282 | |
ashleymills | 0:714293de3836 | 2283 | |
ashleymills | 0:714293de3836 | 2284 | |
ashleymills | 0:714293de3836 | 2285 | /* Process Message(s) from sslFrame */ |
ashleymills | 0:714293de3836 | 2286 | /* return Number of bytes on success, 0 for no data yet, and -1 on error */ |
ashleymills | 0:714293de3836 | 2287 | static int ProcessMessage(const byte* sslFrame, SnifferSession* session, |
ashleymills | 0:714293de3836 | 2288 | int sslBytes, byte* data, const byte* end,char* error) |
ashleymills | 0:714293de3836 | 2289 | { |
ashleymills | 0:714293de3836 | 2290 | const byte* sslBegin = sslFrame; |
ashleymills | 0:714293de3836 | 2291 | const byte* tmp; |
ashleymills | 0:714293de3836 | 2292 | RecordLayerHeader rh; |
ashleymills | 0:714293de3836 | 2293 | int rhSize = 0; |
ashleymills | 0:714293de3836 | 2294 | int ret; |
ashleymills | 0:714293de3836 | 2295 | int decoded = 0; /* bytes stored for user in data */ |
ashleymills | 0:714293de3836 | 2296 | int notEnough; /* notEnough bytes yet flag */ |
ashleymills | 0:714293de3836 | 2297 | SSL* ssl = (session->flags.side == SERVER_END) ? |
ashleymills | 0:714293de3836 | 2298 | session->sslServer : session->sslClient; |
ashleymills | 0:714293de3836 | 2299 | doMessage: |
ashleymills | 0:714293de3836 | 2300 | notEnough = 0; |
ashleymills | 0:714293de3836 | 2301 | if (sslBytes >= RECORD_HEADER_SZ) { |
ashleymills | 0:714293de3836 | 2302 | if (GetRecordHeader(sslFrame, &rh, &rhSize) != 0) { |
ashleymills | 0:714293de3836 | 2303 | SetError(BAD_RECORD_HDR_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 2304 | return -1; |
ashleymills | 0:714293de3836 | 2305 | } |
ashleymills | 0:714293de3836 | 2306 | } |
ashleymills | 0:714293de3836 | 2307 | else |
ashleymills | 0:714293de3836 | 2308 | notEnough = 1; |
ashleymills | 0:714293de3836 | 2309 | |
ashleymills | 0:714293de3836 | 2310 | if (notEnough || rhSize > (sslBytes - RECORD_HEADER_SZ)) { |
ashleymills | 0:714293de3836 | 2311 | /* don't have enough input yet to process full SSL record */ |
ashleymills | 0:714293de3836 | 2312 | Trace(PARTIAL_INPUT_STR); |
ashleymills | 0:714293de3836 | 2313 | |
ashleymills | 0:714293de3836 | 2314 | /* store partial if not there already or we advanced */ |
ashleymills | 0:714293de3836 | 2315 | if (ssl->buffers.inputBuffer.length == 0 || sslBegin != sslFrame) { |
ashleymills | 0:714293de3836 | 2316 | if (sslBytes > (int)ssl->buffers.inputBuffer.bufferSize) { |
ashleymills | 0:714293de3836 | 2317 | if (GrowInputBuffer(ssl, sslBytes, 0) < 0) { |
ashleymills | 0:714293de3836 | 2318 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 2319 | return -1; |
ashleymills | 0:714293de3836 | 2320 | } |
ashleymills | 0:714293de3836 | 2321 | } |
ashleymills | 0:714293de3836 | 2322 | XMEMCPY(ssl->buffers.inputBuffer.buffer, sslFrame, sslBytes); |
ashleymills | 0:714293de3836 | 2323 | ssl->buffers.inputBuffer.length = sslBytes; |
ashleymills | 0:714293de3836 | 2324 | } |
ashleymills | 0:714293de3836 | 2325 | if (HaveMoreInput(session, &sslFrame, &sslBytes, &end, error)) |
ashleymills | 0:714293de3836 | 2326 | goto doMessage; |
ashleymills | 0:714293de3836 | 2327 | return decoded; |
ashleymills | 0:714293de3836 | 2328 | } |
ashleymills | 0:714293de3836 | 2329 | sslFrame += RECORD_HEADER_SZ; |
ashleymills | 0:714293de3836 | 2330 | sslBytes -= RECORD_HEADER_SZ; |
ashleymills | 0:714293de3836 | 2331 | tmp = sslFrame + rhSize; /* may have more than one record to process */ |
ashleymills | 0:714293de3836 | 2332 | |
ashleymills | 0:714293de3836 | 2333 | /* decrypt if needed */ |
ashleymills | 0:714293de3836 | 2334 | if ((session->flags.side == SERVER_END && session->flags.serverCipherOn) |
ashleymills | 0:714293de3836 | 2335 | || (session->flags.side == CLIENT_END && session->flags.clientCipherOn)) { |
ashleymills | 0:714293de3836 | 2336 | if (CheckAvailableSize(ssl, rhSize) < 0) { |
ashleymills | 0:714293de3836 | 2337 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 2338 | return -1; |
ashleymills | 0:714293de3836 | 2339 | } |
ashleymills | 0:714293de3836 | 2340 | sslFrame = DecryptMessage(ssl, sslFrame, rhSize, |
ashleymills | 0:714293de3836 | 2341 | ssl->buffers.outputBuffer.buffer); |
ashleymills | 0:714293de3836 | 2342 | } |
ashleymills | 0:714293de3836 | 2343 | |
ashleymills | 0:714293de3836 | 2344 | switch ((enum ContentType)rh.type) { |
ashleymills | 0:714293de3836 | 2345 | case handshake: |
ashleymills | 0:714293de3836 | 2346 | Trace(GOT_HANDSHAKE_STR); |
ashleymills | 0:714293de3836 | 2347 | ret = DoHandShake(sslFrame, &sslBytes, session, error); |
ashleymills | 0:714293de3836 | 2348 | if (ret != 0) { |
ashleymills | 0:714293de3836 | 2349 | if (session->flags.fatalError == 0) |
ashleymills | 0:714293de3836 | 2350 | SetError(BAD_HANDSHAKE_STR,error,session,FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 2351 | return -1; |
ashleymills | 0:714293de3836 | 2352 | } |
ashleymills | 0:714293de3836 | 2353 | break; |
ashleymills | 0:714293de3836 | 2354 | case change_cipher_spec: |
ashleymills | 0:714293de3836 | 2355 | if (session->flags.side == SERVER_END) |
ashleymills | 0:714293de3836 | 2356 | session->flags.serverCipherOn = 1; |
ashleymills | 0:714293de3836 | 2357 | else |
ashleymills | 0:714293de3836 | 2358 | session->flags.clientCipherOn = 1; |
ashleymills | 0:714293de3836 | 2359 | Trace(GOT_CHANGE_CIPHER_STR); |
ashleymills | 0:714293de3836 | 2360 | ssl->options.handShakeState = HANDSHAKE_DONE; |
ashleymills | 0:714293de3836 | 2361 | break; |
ashleymills | 0:714293de3836 | 2362 | case application_data: |
ashleymills | 0:714293de3836 | 2363 | Trace(GOT_APP_DATA_STR); |
ashleymills | 0:714293de3836 | 2364 | { |
ashleymills | 0:714293de3836 | 2365 | word32 inOutIdx = 0; |
ashleymills | 0:714293de3836 | 2366 | |
ashleymills | 0:714293de3836 | 2367 | ret = DoApplicationData(ssl, (byte*)sslFrame, &inOutIdx); |
ashleymills | 0:714293de3836 | 2368 | if (ret == 0) { |
ashleymills | 0:714293de3836 | 2369 | ret = ssl->buffers.clearOutputBuffer.length; |
ashleymills | 0:714293de3836 | 2370 | TraceGotData(ret); |
ashleymills | 0:714293de3836 | 2371 | if (ret) { /* may be blank message */ |
ashleymills | 0:714293de3836 | 2372 | XMEMCPY(&data[decoded], |
ashleymills | 0:714293de3836 | 2373 | ssl->buffers.clearOutputBuffer.buffer, ret); |
ashleymills | 0:714293de3836 | 2374 | TraceAddedData(ret, decoded); |
ashleymills | 0:714293de3836 | 2375 | decoded += ret; |
ashleymills | 0:714293de3836 | 2376 | ssl->buffers.clearOutputBuffer.length = 0; |
ashleymills | 0:714293de3836 | 2377 | } |
ashleymills | 0:714293de3836 | 2378 | } |
ashleymills | 0:714293de3836 | 2379 | else { |
ashleymills | 0:714293de3836 | 2380 | SetError(BAD_APP_DATA_STR, error,session,FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 2381 | return -1; |
ashleymills | 0:714293de3836 | 2382 | } |
ashleymills | 0:714293de3836 | 2383 | if (ssl->buffers.outputBuffer.dynamicFlag) |
ashleymills | 0:714293de3836 | 2384 | ShrinkOutputBuffer(ssl); |
ashleymills | 0:714293de3836 | 2385 | } |
ashleymills | 0:714293de3836 | 2386 | break; |
ashleymills | 0:714293de3836 | 2387 | case alert: |
ashleymills | 0:714293de3836 | 2388 | Trace(GOT_ALERT_STR); |
ashleymills | 0:714293de3836 | 2389 | break; |
ashleymills | 0:714293de3836 | 2390 | case no_type: |
ashleymills | 0:714293de3836 | 2391 | default: |
ashleymills | 0:714293de3836 | 2392 | SetError(GOT_UNKNOWN_RECORD_STR, error, session, FATAL_ERROR_STATE); |
ashleymills | 0:714293de3836 | 2393 | return -1; |
ashleymills | 0:714293de3836 | 2394 | } |
ashleymills | 0:714293de3836 | 2395 | |
ashleymills | 0:714293de3836 | 2396 | if (tmp < end) { |
ashleymills | 0:714293de3836 | 2397 | Trace(ANOTHER_MSG_STR); |
ashleymills | 0:714293de3836 | 2398 | sslFrame = tmp; |
ashleymills | 0:714293de3836 | 2399 | sslBytes = (int)(end - tmp); |
ashleymills | 0:714293de3836 | 2400 | goto doMessage; |
ashleymills | 0:714293de3836 | 2401 | } |
ashleymills | 0:714293de3836 | 2402 | |
ashleymills | 0:714293de3836 | 2403 | /* clear used input */ |
ashleymills | 0:714293de3836 | 2404 | ssl->buffers.inputBuffer.length = 0; |
ashleymills | 0:714293de3836 | 2405 | |
ashleymills | 0:714293de3836 | 2406 | /* could have more input ready now */ |
ashleymills | 0:714293de3836 | 2407 | if (HaveMoreInput(session, &sslFrame, &sslBytes, &end, error)) |
ashleymills | 0:714293de3836 | 2408 | goto doMessage; |
ashleymills | 0:714293de3836 | 2409 | |
ashleymills | 0:714293de3836 | 2410 | if (ssl->buffers.inputBuffer.dynamicFlag) |
ashleymills | 0:714293de3836 | 2411 | ShrinkInputBuffer(ssl, NO_FORCED_FREE); |
ashleymills | 0:714293de3836 | 2412 | |
ashleymills | 0:714293de3836 | 2413 | return decoded; |
ashleymills | 0:714293de3836 | 2414 | } |
ashleymills | 0:714293de3836 | 2415 | |
ashleymills | 0:714293de3836 | 2416 | |
ashleymills | 0:714293de3836 | 2417 | /* See if we need to process any pending FIN captures */ |
ashleymills | 0:714293de3836 | 2418 | static void CheckFinCapture(IpInfo* ipInfo, TcpInfo* tcpInfo, |
ashleymills | 0:714293de3836 | 2419 | SnifferSession* session) |
ashleymills | 0:714293de3836 | 2420 | { |
ashleymills | 0:714293de3836 | 2421 | if (session->finCaputre.cliFinSeq && session->finCaputre.cliFinSeq <= |
ashleymills | 0:714293de3836 | 2422 | session->cliExpected) { |
ashleymills | 0:714293de3836 | 2423 | if (session->finCaputre.cliCounted == 0) { |
ashleymills | 0:714293de3836 | 2424 | session->flags.finCount += 1; |
ashleymills | 0:714293de3836 | 2425 | session->finCaputre.cliCounted = 1; |
ashleymills | 0:714293de3836 | 2426 | TraceClientFin(session->finCaputre.cliFinSeq, session->cliExpected); |
ashleymills | 0:714293de3836 | 2427 | } |
ashleymills | 0:714293de3836 | 2428 | } |
ashleymills | 0:714293de3836 | 2429 | |
ashleymills | 0:714293de3836 | 2430 | if (session->finCaputre.srvFinSeq && session->finCaputre.srvFinSeq <= |
ashleymills | 0:714293de3836 | 2431 | session->srvExpected) { |
ashleymills | 0:714293de3836 | 2432 | if (session->finCaputre.srvCounted == 0) { |
ashleymills | 0:714293de3836 | 2433 | session->flags.finCount += 1; |
ashleymills | 0:714293de3836 | 2434 | session->finCaputre.srvCounted = 1; |
ashleymills | 0:714293de3836 | 2435 | TraceServerFin(session->finCaputre.srvFinSeq, session->srvExpected); |
ashleymills | 0:714293de3836 | 2436 | } |
ashleymills | 0:714293de3836 | 2437 | } |
ashleymills | 0:714293de3836 | 2438 | |
ashleymills | 0:714293de3836 | 2439 | if (session->flags.finCount >= 2) |
ashleymills | 0:714293de3836 | 2440 | RemoveSession(session, ipInfo, tcpInfo, 0); |
ashleymills | 0:714293de3836 | 2441 | } |
ashleymills | 0:714293de3836 | 2442 | |
ashleymills | 0:714293de3836 | 2443 | |
ashleymills | 0:714293de3836 | 2444 | /* If session is in fatal error state free resources now |
ashleymills | 0:714293de3836 | 2445 | return true if removed, 0 otherwise */ |
ashleymills | 0:714293de3836 | 2446 | static int RemoveFatalSession(IpInfo* ipInfo, TcpInfo* tcpInfo, |
ashleymills | 0:714293de3836 | 2447 | SnifferSession* session, char* error) |
ashleymills | 0:714293de3836 | 2448 | { |
ashleymills | 0:714293de3836 | 2449 | if (session && session->flags.fatalError == FATAL_ERROR_STATE) { |
ashleymills | 0:714293de3836 | 2450 | RemoveSession(session, ipInfo, tcpInfo, 0); |
ashleymills | 0:714293de3836 | 2451 | SetError(FATAL_ERROR_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 2452 | return 1; |
ashleymills | 0:714293de3836 | 2453 | } |
ashleymills | 0:714293de3836 | 2454 | return 0; |
ashleymills | 0:714293de3836 | 2455 | } |
ashleymills | 0:714293de3836 | 2456 | |
ashleymills | 0:714293de3836 | 2457 | |
ashleymills | 0:714293de3836 | 2458 | /* Passes in an IP/TCP packet for decoding (ethernet/localhost frame) removed */ |
ashleymills | 0:714293de3836 | 2459 | /* returns Number of bytes on success, 0 for no data yet, and -1 on error */ |
ashleymills | 0:714293de3836 | 2460 | int ssl_DecodePacket(const byte* packet, int length, byte* data, char* error) |
ashleymills | 0:714293de3836 | 2461 | { |
ashleymills | 0:714293de3836 | 2462 | TcpInfo tcpInfo; |
ashleymills | 0:714293de3836 | 2463 | IpInfo ipInfo; |
ashleymills | 0:714293de3836 | 2464 | const byte* sslFrame; |
ashleymills | 0:714293de3836 | 2465 | const byte* end = packet + length; |
ashleymills | 0:714293de3836 | 2466 | int sslBytes; /* ssl bytes unconsumed */ |
ashleymills | 0:714293de3836 | 2467 | int ret; |
ashleymills | 0:714293de3836 | 2468 | SnifferSession* session = 0; |
ashleymills | 0:714293de3836 | 2469 | |
ashleymills | 0:714293de3836 | 2470 | if (CheckHeaders(&ipInfo, &tcpInfo, packet, length, &sslFrame, &sslBytes, |
ashleymills | 0:714293de3836 | 2471 | error) != 0) |
ashleymills | 0:714293de3836 | 2472 | return -1; |
ashleymills | 0:714293de3836 | 2473 | |
ashleymills | 0:714293de3836 | 2474 | ret = CheckSession(&ipInfo, &tcpInfo, sslBytes, &session, error); |
ashleymills | 0:714293de3836 | 2475 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1; |
ashleymills | 0:714293de3836 | 2476 | else if (ret == -1) return -1; |
ashleymills | 0:714293de3836 | 2477 | else if (ret == 1) return 0; /* done for now */ |
ashleymills | 0:714293de3836 | 2478 | |
ashleymills | 0:714293de3836 | 2479 | ret = CheckSequence(&ipInfo, &tcpInfo, session, &sslBytes, &sslFrame,error); |
ashleymills | 0:714293de3836 | 2480 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1; |
ashleymills | 0:714293de3836 | 2481 | else if (ret == -1) return -1; |
ashleymills | 0:714293de3836 | 2482 | else if (ret == 1) return 0; /* done for now */ |
ashleymills | 0:714293de3836 | 2483 | |
ashleymills | 0:714293de3836 | 2484 | ret = CheckPreRecord(&ipInfo, &tcpInfo, &sslFrame, &session, &sslBytes, |
ashleymills | 0:714293de3836 | 2485 | &end, error); |
ashleymills | 0:714293de3836 | 2486 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1; |
ashleymills | 0:714293de3836 | 2487 | else if (ret == -1) return -1; |
ashleymills | 0:714293de3836 | 2488 | else if (ret == 1) return 0; /* done for now */ |
ashleymills | 0:714293de3836 | 2489 | |
ashleymills | 0:714293de3836 | 2490 | ret = ProcessMessage(sslFrame, session, sslBytes, data, end, error); |
ashleymills | 0:714293de3836 | 2491 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1; |
ashleymills | 0:714293de3836 | 2492 | CheckFinCapture(&ipInfo, &tcpInfo, session); |
ashleymills | 0:714293de3836 | 2493 | return ret; |
ashleymills | 0:714293de3836 | 2494 | } |
ashleymills | 0:714293de3836 | 2495 | |
ashleymills | 0:714293de3836 | 2496 | |
ashleymills | 0:714293de3836 | 2497 | /* Enables (if traceFile)/ Disables debug tracing */ |
ashleymills | 0:714293de3836 | 2498 | /* returns 0 on success, -1 on error */ |
ashleymills | 0:714293de3836 | 2499 | int ssl_Trace(const char* traceFile, char* error) |
ashleymills | 0:714293de3836 | 2500 | { |
ashleymills | 0:714293de3836 | 2501 | if (traceFile) { |
ashleymills | 0:714293de3836 | 2502 | TraceFile = fopen(traceFile, "a"); |
ashleymills | 0:714293de3836 | 2503 | if (!TraceFile) { |
ashleymills | 0:714293de3836 | 2504 | SetError(BAD_TRACE_FILE_STR, error, NULL, 0); |
ashleymills | 0:714293de3836 | 2505 | return -1; |
ashleymills | 0:714293de3836 | 2506 | } |
ashleymills | 0:714293de3836 | 2507 | TraceOn = 1; |
ashleymills | 0:714293de3836 | 2508 | } |
ashleymills | 0:714293de3836 | 2509 | else |
ashleymills | 0:714293de3836 | 2510 | TraceOn = 0; |
ashleymills | 0:714293de3836 | 2511 | |
ashleymills | 0:714293de3836 | 2512 | return 0; |
ashleymills | 0:714293de3836 | 2513 | } |
ashleymills | 0:714293de3836 | 2514 | |
ashleymills | 0:714293de3836 | 2515 | |
ashleymills | 0:714293de3836 | 2516 | |
ashleymills | 0:714293de3836 | 2517 | |
ashleymills | 0:714293de3836 | 2518 | #endif /* CYASSL_SNIFFER */ |