A library for setting up Secure Socket Layer (SSL) connections and verifying remote hosts using certificates. Contains only the source files for mbed platform implementation of the library.
Dependents: HTTPClient-SSL HTTPClient-SSL HTTPClient-SSL HTTPClient-SSL
src/sniffer.c@6:cf58d49e1a86, 2015-03-23 (annotated)
- Committer:
- Mike Fiore
- Date:
- Mon Mar 23 16:51:07 2015 -0500
- Revision:
- 6:cf58d49e1a86
- Parent:
- 0:b86d15c6ba29
fix whitespace in sha512.c
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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Vanger | 0:b86d15c6ba29 | 1 | /* sniffer.c |
Vanger | 0:b86d15c6ba29 | 2 | * |
Vanger | 0:b86d15c6ba29 | 3 | * Copyright (C) 2006-2014 wolfSSL Inc. |
Vanger | 0:b86d15c6ba29 | 4 | * |
Vanger | 0:b86d15c6ba29 | 5 | * This file is part of CyaSSL. |
Vanger | 0:b86d15c6ba29 | 6 | * |
Vanger | 0:b86d15c6ba29 | 7 | * CyaSSL is free software; you can redistribute it and/or modify |
Vanger | 0:b86d15c6ba29 | 8 | * it under the terms of the GNU General Public License as published by |
Vanger | 0:b86d15c6ba29 | 9 | * the Free Software Foundation; either version 2 of the License, or |
Vanger | 0:b86d15c6ba29 | 10 | * (at your option) any later version. |
Vanger | 0:b86d15c6ba29 | 11 | * |
Vanger | 0:b86d15c6ba29 | 12 | * CyaSSL is distributed in the hope that it will be useful, |
Vanger | 0:b86d15c6ba29 | 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
Vanger | 0:b86d15c6ba29 | 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Vanger | 0:b86d15c6ba29 | 15 | * GNU General Public License for more details. |
Vanger | 0:b86d15c6ba29 | 16 | * |
Vanger | 0:b86d15c6ba29 | 17 | * You should have received a copy of the GNU General Public License |
Vanger | 0:b86d15c6ba29 | 18 | * along with this program; if not, write to the Free Software |
Vanger | 0:b86d15c6ba29 | 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA |
Vanger | 0:b86d15c6ba29 | 20 | */ |
Vanger | 0:b86d15c6ba29 | 21 | |
Vanger | 0:b86d15c6ba29 | 22 | |
Vanger | 0:b86d15c6ba29 | 23 | |
Vanger | 0:b86d15c6ba29 | 24 | #ifdef HAVE_CONFIG_H |
Vanger | 0:b86d15c6ba29 | 25 | #include <config.h> |
Vanger | 0:b86d15c6ba29 | 26 | #endif |
Vanger | 0:b86d15c6ba29 | 27 | |
Vanger | 0:b86d15c6ba29 | 28 | #include <cyassl/ctaocrypt/settings.h> |
Vanger | 0:b86d15c6ba29 | 29 | |
Vanger | 0:b86d15c6ba29 | 30 | #ifdef CYASSL_SNIFFER |
Vanger | 0:b86d15c6ba29 | 31 | |
Vanger | 0:b86d15c6ba29 | 32 | #include <assert.h> |
Vanger | 0:b86d15c6ba29 | 33 | #include <time.h> |
Vanger | 0:b86d15c6ba29 | 34 | |
Vanger | 0:b86d15c6ba29 | 35 | #ifndef _WIN32 |
Vanger | 0:b86d15c6ba29 | 36 | #include <arpa/inet.h> |
Vanger | 0:b86d15c6ba29 | 37 | #endif |
Vanger | 0:b86d15c6ba29 | 38 | |
Vanger | 0:b86d15c6ba29 | 39 | #ifdef _WIN32 |
Vanger | 0:b86d15c6ba29 | 40 | #define SNPRINTF _snprintf |
Vanger | 0:b86d15c6ba29 | 41 | #else |
Vanger | 0:b86d15c6ba29 | 42 | #define SNPRINTF snprintf |
Vanger | 0:b86d15c6ba29 | 43 | #endif |
Vanger | 0:b86d15c6ba29 | 44 | |
Vanger | 0:b86d15c6ba29 | 45 | #include <cyassl/openssl/ssl.h> |
Vanger | 0:b86d15c6ba29 | 46 | #include <cyassl/internal.h> |
Vanger | 0:b86d15c6ba29 | 47 | #include <cyassl/error-ssl.h> |
Vanger | 0:b86d15c6ba29 | 48 | #include <cyassl/sniffer.h> |
Vanger | 0:b86d15c6ba29 | 49 | #include <cyassl/sniffer_error.h> |
Vanger | 0:b86d15c6ba29 | 50 | |
Vanger | 0:b86d15c6ba29 | 51 | |
Vanger | 0:b86d15c6ba29 | 52 | #ifndef min |
Vanger | 0:b86d15c6ba29 | 53 | |
Vanger | 0:b86d15c6ba29 | 54 | static INLINE word32 min(word32 a, word32 b) |
Vanger | 0:b86d15c6ba29 | 55 | { |
Vanger | 0:b86d15c6ba29 | 56 | return a > b ? b : a; |
Vanger | 0:b86d15c6ba29 | 57 | } |
Vanger | 0:b86d15c6ba29 | 58 | |
Vanger | 0:b86d15c6ba29 | 59 | #endif |
Vanger | 0:b86d15c6ba29 | 60 | |
Vanger | 0:b86d15c6ba29 | 61 | #ifndef CYASSL_SNIFFER_TIMEOUT |
Vanger | 0:b86d15c6ba29 | 62 | #define CYASSL_SNIFFER_TIMEOUT 900 |
Vanger | 0:b86d15c6ba29 | 63 | /* Cache unclosed Sessions for 15 minutes since last used */ |
Vanger | 0:b86d15c6ba29 | 64 | #endif |
Vanger | 0:b86d15c6ba29 | 65 | |
Vanger | 0:b86d15c6ba29 | 66 | /* Misc constants */ |
Vanger | 0:b86d15c6ba29 | 67 | enum { |
Vanger | 0:b86d15c6ba29 | 68 | MAX_SERVER_ADDRESS = 128, /* maximum server address length */ |
Vanger | 0:b86d15c6ba29 | 69 | MAX_SERVER_NAME = 128, /* maximum server name length */ |
Vanger | 0:b86d15c6ba29 | 70 | MAX_ERROR_LEN = 80, /* maximum error length */ |
Vanger | 0:b86d15c6ba29 | 71 | ETHER_IF_ADDR_LEN = 6, /* ethernet interface address length */ |
Vanger | 0:b86d15c6ba29 | 72 | LOCAL_IF_ADDR_LEN = 4, /* localhost interface address length, !windows */ |
Vanger | 0:b86d15c6ba29 | 73 | TCP_PROTO = 6, /* TCP_PROTOCOL */ |
Vanger | 0:b86d15c6ba29 | 74 | IP_HDR_SZ = 20, /* IP header legnth, min */ |
Vanger | 0:b86d15c6ba29 | 75 | TCP_HDR_SZ = 20, /* TCP header legnth, min */ |
Vanger | 0:b86d15c6ba29 | 76 | IPV4 = 4, /* IP version 4 */ |
Vanger | 0:b86d15c6ba29 | 77 | TCP_PROTOCOL = 6, /* TCP Protocol id */ |
Vanger | 0:b86d15c6ba29 | 78 | TRACE_MSG_SZ = 80, /* Trace Message buffer size */ |
Vanger | 0:b86d15c6ba29 | 79 | HASH_SIZE = 499, /* Session Hash Table Rows */ |
Vanger | 0:b86d15c6ba29 | 80 | PSEUDO_HDR_SZ = 12, /* TCP Pseudo Header size in bytes */ |
Vanger | 0:b86d15c6ba29 | 81 | FATAL_ERROR_STATE = 1, /* SnifferSession fatal error state */ |
Vanger | 0:b86d15c6ba29 | 82 | TICKET_HINT_LEN = 4, /* Session Ticket Hint length */ |
Vanger | 0:b86d15c6ba29 | 83 | EXT_TYPE_SZ = 2, /* Extension length */ |
Vanger | 0:b86d15c6ba29 | 84 | MAX_INPUT_SZ = MAX_RECORD_SIZE + COMP_EXTRA + MAX_MSG_EXTRA + |
Vanger | 0:b86d15c6ba29 | 85 | MTU_EXTRA, /* Max input sz of reassembly */ |
Vanger | 0:b86d15c6ba29 | 86 | TICKET_EXT_ID = 0x23 /* Session Ticket Extension ID */ |
Vanger | 0:b86d15c6ba29 | 87 | }; |
Vanger | 0:b86d15c6ba29 | 88 | |
Vanger | 0:b86d15c6ba29 | 89 | |
Vanger | 0:b86d15c6ba29 | 90 | #ifdef _WIN32 |
Vanger | 0:b86d15c6ba29 | 91 | |
Vanger | 0:b86d15c6ba29 | 92 | static HMODULE dllModule; /* for error string resources */ |
Vanger | 0:b86d15c6ba29 | 93 | |
Vanger | 0:b86d15c6ba29 | 94 | BOOL APIENTRY DllMain( HMODULE hModule, |
Vanger | 0:b86d15c6ba29 | 95 | DWORD ul_reason_for_call, |
Vanger | 0:b86d15c6ba29 | 96 | LPVOID lpReserved |
Vanger | 0:b86d15c6ba29 | 97 | ) |
Vanger | 0:b86d15c6ba29 | 98 | { |
Vanger | 0:b86d15c6ba29 | 99 | static int didInit = 0; |
Vanger | 0:b86d15c6ba29 | 100 | |
Vanger | 0:b86d15c6ba29 | 101 | switch (ul_reason_for_call) |
Vanger | 0:b86d15c6ba29 | 102 | { |
Vanger | 0:b86d15c6ba29 | 103 | case DLL_PROCESS_ATTACH: |
Vanger | 0:b86d15c6ba29 | 104 | if (didInit == 0) { |
Vanger | 0:b86d15c6ba29 | 105 | dllModule = hModule; |
Vanger | 0:b86d15c6ba29 | 106 | ssl_InitSniffer(); |
Vanger | 0:b86d15c6ba29 | 107 | didInit = 1; |
Vanger | 0:b86d15c6ba29 | 108 | } |
Vanger | 0:b86d15c6ba29 | 109 | break; |
Vanger | 0:b86d15c6ba29 | 110 | case DLL_THREAD_ATTACH: |
Vanger | 0:b86d15c6ba29 | 111 | break; |
Vanger | 0:b86d15c6ba29 | 112 | case DLL_THREAD_DETACH: |
Vanger | 0:b86d15c6ba29 | 113 | break; |
Vanger | 0:b86d15c6ba29 | 114 | case DLL_PROCESS_DETACH: |
Vanger | 0:b86d15c6ba29 | 115 | if (didInit) { |
Vanger | 0:b86d15c6ba29 | 116 | ssl_FreeSniffer(); |
Vanger | 0:b86d15c6ba29 | 117 | didInit = 0; |
Vanger | 0:b86d15c6ba29 | 118 | } |
Vanger | 0:b86d15c6ba29 | 119 | break; |
Vanger | 0:b86d15c6ba29 | 120 | } |
Vanger | 0:b86d15c6ba29 | 121 | return TRUE; |
Vanger | 0:b86d15c6ba29 | 122 | } |
Vanger | 0:b86d15c6ba29 | 123 | |
Vanger | 0:b86d15c6ba29 | 124 | #endif /* _WIN32 */ |
Vanger | 0:b86d15c6ba29 | 125 | |
Vanger | 0:b86d15c6ba29 | 126 | |
Vanger | 0:b86d15c6ba29 | 127 | static int TraceOn = 0; /* Trace is off by default */ |
Vanger | 0:b86d15c6ba29 | 128 | static FILE* TraceFile = 0; |
Vanger | 0:b86d15c6ba29 | 129 | |
Vanger | 0:b86d15c6ba29 | 130 | |
Vanger | 0:b86d15c6ba29 | 131 | /* windows uses .rc table for this */ |
Vanger | 0:b86d15c6ba29 | 132 | #ifndef _WIN32 |
Vanger | 0:b86d15c6ba29 | 133 | |
Vanger | 0:b86d15c6ba29 | 134 | static const char* const msgTable[] = |
Vanger | 0:b86d15c6ba29 | 135 | { |
Vanger | 0:b86d15c6ba29 | 136 | /* 1 */ |
Vanger | 0:b86d15c6ba29 | 137 | "Out of Memory", |
Vanger | 0:b86d15c6ba29 | 138 | "New SSL Sniffer Server Registered", |
Vanger | 0:b86d15c6ba29 | 139 | "Checking IP Header", |
Vanger | 0:b86d15c6ba29 | 140 | "SSL Sniffer Server Not Registered", |
Vanger | 0:b86d15c6ba29 | 141 | "Checking TCP Header", |
Vanger | 0:b86d15c6ba29 | 142 | |
Vanger | 0:b86d15c6ba29 | 143 | /* 6 */ |
Vanger | 0:b86d15c6ba29 | 144 | "SSL Sniffer Server Port Not Registered", |
Vanger | 0:b86d15c6ba29 | 145 | "RSA Private Decrypt Error", |
Vanger | 0:b86d15c6ba29 | 146 | "RSA Private Decode Error", |
Vanger | 0:b86d15c6ba29 | 147 | "Set Cipher Spec Error", |
Vanger | 0:b86d15c6ba29 | 148 | "Server Hello Input Malformed", |
Vanger | 0:b86d15c6ba29 | 149 | |
Vanger | 0:b86d15c6ba29 | 150 | /* 11 */ |
Vanger | 0:b86d15c6ba29 | 151 | "Couldn't Resume Session Error", |
Vanger | 0:b86d15c6ba29 | 152 | "Server Did Resumption", |
Vanger | 0:b86d15c6ba29 | 153 | "Client Hello Input Malformed", |
Vanger | 0:b86d15c6ba29 | 154 | "Client Trying to Resume", |
Vanger | 0:b86d15c6ba29 | 155 | "Handshake Input Malformed", |
Vanger | 0:b86d15c6ba29 | 156 | |
Vanger | 0:b86d15c6ba29 | 157 | /* 16 */ |
Vanger | 0:b86d15c6ba29 | 158 | "Got Hello Verify msg", |
Vanger | 0:b86d15c6ba29 | 159 | "Got Server Hello msg", |
Vanger | 0:b86d15c6ba29 | 160 | "Got Cert Request msg", |
Vanger | 0:b86d15c6ba29 | 161 | "Got Server Key Exchange msg", |
Vanger | 0:b86d15c6ba29 | 162 | "Got Cert msg", |
Vanger | 0:b86d15c6ba29 | 163 | |
Vanger | 0:b86d15c6ba29 | 164 | /* 21 */ |
Vanger | 0:b86d15c6ba29 | 165 | "Got Server Hello Done msg", |
Vanger | 0:b86d15c6ba29 | 166 | "Got Finished msg", |
Vanger | 0:b86d15c6ba29 | 167 | "Got Client Hello msg", |
Vanger | 0:b86d15c6ba29 | 168 | "Got Client Key Exchange msg", |
Vanger | 0:b86d15c6ba29 | 169 | "Got Cert Verify msg", |
Vanger | 0:b86d15c6ba29 | 170 | |
Vanger | 0:b86d15c6ba29 | 171 | /* 26 */ |
Vanger | 0:b86d15c6ba29 | 172 | "Got Unknown Handshake msg", |
Vanger | 0:b86d15c6ba29 | 173 | "New SSL Sniffer Session created", |
Vanger | 0:b86d15c6ba29 | 174 | "Couldn't create new SSL", |
Vanger | 0:b86d15c6ba29 | 175 | "Got a Packet to decode", |
Vanger | 0:b86d15c6ba29 | 176 | "No data present", |
Vanger | 0:b86d15c6ba29 | 177 | |
Vanger | 0:b86d15c6ba29 | 178 | /* 31 */ |
Vanger | 0:b86d15c6ba29 | 179 | "Session Not Found", |
Vanger | 0:b86d15c6ba29 | 180 | "Got an Old Client Hello msg", |
Vanger | 0:b86d15c6ba29 | 181 | "Old Client Hello Input Malformed", |
Vanger | 0:b86d15c6ba29 | 182 | "Old Client Hello OK", |
Vanger | 0:b86d15c6ba29 | 183 | "Bad Old Client Hello", |
Vanger | 0:b86d15c6ba29 | 184 | |
Vanger | 0:b86d15c6ba29 | 185 | /* 36 */ |
Vanger | 0:b86d15c6ba29 | 186 | "Bad Record Header", |
Vanger | 0:b86d15c6ba29 | 187 | "Record Header Input Malformed", |
Vanger | 0:b86d15c6ba29 | 188 | "Got a HandShake msg", |
Vanger | 0:b86d15c6ba29 | 189 | "Bad HandShake msg", |
Vanger | 0:b86d15c6ba29 | 190 | "Got a Change Cipher Spec msg", |
Vanger | 0:b86d15c6ba29 | 191 | |
Vanger | 0:b86d15c6ba29 | 192 | /* 41 */ |
Vanger | 0:b86d15c6ba29 | 193 | "Got Application Data msg", |
Vanger | 0:b86d15c6ba29 | 194 | "Bad Application Data", |
Vanger | 0:b86d15c6ba29 | 195 | "Got an Alert msg", |
Vanger | 0:b86d15c6ba29 | 196 | "Another msg to Process", |
Vanger | 0:b86d15c6ba29 | 197 | "Removing Session From Table", |
Vanger | 0:b86d15c6ba29 | 198 | |
Vanger | 0:b86d15c6ba29 | 199 | /* 46 */ |
Vanger | 0:b86d15c6ba29 | 200 | "Bad Key File", |
Vanger | 0:b86d15c6ba29 | 201 | "Wrong IP Version", |
Vanger | 0:b86d15c6ba29 | 202 | "Wrong Protocol type", |
Vanger | 0:b86d15c6ba29 | 203 | "Packet Short for header processing", |
Vanger | 0:b86d15c6ba29 | 204 | "Got Unknown Record Type", |
Vanger | 0:b86d15c6ba29 | 205 | |
Vanger | 0:b86d15c6ba29 | 206 | /* 51 */ |
Vanger | 0:b86d15c6ba29 | 207 | "Can't Open Trace File", |
Vanger | 0:b86d15c6ba29 | 208 | "Session in Fatal Error State", |
Vanger | 0:b86d15c6ba29 | 209 | "Partial SSL record received", |
Vanger | 0:b86d15c6ba29 | 210 | "Buffer Error, malformed input", |
Vanger | 0:b86d15c6ba29 | 211 | "Added to Partial Input", |
Vanger | 0:b86d15c6ba29 | 212 | |
Vanger | 0:b86d15c6ba29 | 213 | /* 56 */ |
Vanger | 0:b86d15c6ba29 | 214 | "Received a Duplicate Packet", |
Vanger | 0:b86d15c6ba29 | 215 | "Received an Out of Order Packet", |
Vanger | 0:b86d15c6ba29 | 216 | "Received an Overlap Duplicate Packet", |
Vanger | 0:b86d15c6ba29 | 217 | "Received an Overlap Reassembly Begin Duplicate Packet", |
Vanger | 0:b86d15c6ba29 | 218 | "Received an Overlap Reassembly End Duplicate Packet", |
Vanger | 0:b86d15c6ba29 | 219 | |
Vanger | 0:b86d15c6ba29 | 220 | /* 61 */ |
Vanger | 0:b86d15c6ba29 | 221 | "Missed the Client Hello Entirely", |
Vanger | 0:b86d15c6ba29 | 222 | "Got Hello Request msg", |
Vanger | 0:b86d15c6ba29 | 223 | "Got Session Ticket msg", |
Vanger | 0:b86d15c6ba29 | 224 | "Bad Input", |
Vanger | 0:b86d15c6ba29 | 225 | "Bad Decrypt Type", |
Vanger | 0:b86d15c6ba29 | 226 | |
Vanger | 0:b86d15c6ba29 | 227 | /* 66 */ |
Vanger | 0:b86d15c6ba29 | 228 | "Bad Finished Message Processing", |
Vanger | 0:b86d15c6ba29 | 229 | "Bad Compression Type", |
Vanger | 0:b86d15c6ba29 | 230 | "Bad DeriveKeys Error", |
Vanger | 0:b86d15c6ba29 | 231 | "Saw ACK for Missing Packet Error", |
Vanger | 0:b86d15c6ba29 | 232 | "Bad Decrypt Operation", |
Vanger | 0:b86d15c6ba29 | 233 | |
Vanger | 0:b86d15c6ba29 | 234 | /* 71 */ |
Vanger | 0:b86d15c6ba29 | 235 | "Decrypt Keys Not Set Up", |
Vanger | 0:b86d15c6ba29 | 236 | "Late Key Load Error" |
Vanger | 0:b86d15c6ba29 | 237 | }; |
Vanger | 0:b86d15c6ba29 | 238 | |
Vanger | 0:b86d15c6ba29 | 239 | |
Vanger | 0:b86d15c6ba29 | 240 | /* *nix version uses table above */ |
Vanger | 0:b86d15c6ba29 | 241 | static void GetError(int idx, char* str) |
Vanger | 0:b86d15c6ba29 | 242 | { |
Vanger | 0:b86d15c6ba29 | 243 | XSTRNCPY(str, msgTable[idx - 1], MAX_ERROR_LEN); |
Vanger | 0:b86d15c6ba29 | 244 | } |
Vanger | 0:b86d15c6ba29 | 245 | |
Vanger | 0:b86d15c6ba29 | 246 | |
Vanger | 0:b86d15c6ba29 | 247 | #else /* _WIN32 */ |
Vanger | 0:b86d15c6ba29 | 248 | |
Vanger | 0:b86d15c6ba29 | 249 | |
Vanger | 0:b86d15c6ba29 | 250 | /* Windows version uses .rc table */ |
Vanger | 0:b86d15c6ba29 | 251 | static void GetError(int idx, char* buffer) |
Vanger | 0:b86d15c6ba29 | 252 | { |
Vanger | 0:b86d15c6ba29 | 253 | if (!LoadStringA(dllModule, idx, buffer, MAX_ERROR_LEN)) |
Vanger | 0:b86d15c6ba29 | 254 | buffer[0] = 0; |
Vanger | 0:b86d15c6ba29 | 255 | } |
Vanger | 0:b86d15c6ba29 | 256 | |
Vanger | 0:b86d15c6ba29 | 257 | |
Vanger | 0:b86d15c6ba29 | 258 | #endif /* _WIN32 */ |
Vanger | 0:b86d15c6ba29 | 259 | |
Vanger | 0:b86d15c6ba29 | 260 | |
Vanger | 0:b86d15c6ba29 | 261 | /* Packet Buffer for reassembly list and ready list */ |
Vanger | 0:b86d15c6ba29 | 262 | typedef struct PacketBuffer { |
Vanger | 0:b86d15c6ba29 | 263 | word32 begin; /* relative sequence begin */ |
Vanger | 0:b86d15c6ba29 | 264 | word32 end; /* relative sequence end */ |
Vanger | 0:b86d15c6ba29 | 265 | byte* data; /* actual data */ |
Vanger | 0:b86d15c6ba29 | 266 | struct PacketBuffer* next; /* next on reassembly list or ready list */ |
Vanger | 0:b86d15c6ba29 | 267 | } PacketBuffer; |
Vanger | 0:b86d15c6ba29 | 268 | |
Vanger | 0:b86d15c6ba29 | 269 | |
Vanger | 0:b86d15c6ba29 | 270 | #ifdef HAVE_SNI |
Vanger | 0:b86d15c6ba29 | 271 | |
Vanger | 0:b86d15c6ba29 | 272 | /* NamedKey maps a SNI name to a specific private key */ |
Vanger | 0:b86d15c6ba29 | 273 | typedef struct NamedKey { |
Vanger | 0:b86d15c6ba29 | 274 | char name[MAX_SERVER_NAME]; /* server DNS name */ |
Vanger | 0:b86d15c6ba29 | 275 | word32 nameSz; /* size of server DNS name */ |
Vanger | 0:b86d15c6ba29 | 276 | byte* key; /* DER private key */ |
Vanger | 0:b86d15c6ba29 | 277 | word32 keySz; /* size of DER private key */ |
Vanger | 0:b86d15c6ba29 | 278 | struct NamedKey* next; /* for list */ |
Vanger | 0:b86d15c6ba29 | 279 | } NamedKey; |
Vanger | 0:b86d15c6ba29 | 280 | |
Vanger | 0:b86d15c6ba29 | 281 | #endif |
Vanger | 0:b86d15c6ba29 | 282 | |
Vanger | 0:b86d15c6ba29 | 283 | |
Vanger | 0:b86d15c6ba29 | 284 | /* Sniffer Server holds info for each server/port monitored */ |
Vanger | 0:b86d15c6ba29 | 285 | typedef struct SnifferServer { |
Vanger | 0:b86d15c6ba29 | 286 | SSL_CTX* ctx; /* SSL context */ |
Vanger | 0:b86d15c6ba29 | 287 | char address[MAX_SERVER_ADDRESS]; /* passed in server address */ |
Vanger | 0:b86d15c6ba29 | 288 | word32 server; /* netowrk order address */ |
Vanger | 0:b86d15c6ba29 | 289 | int port; /* server port */ |
Vanger | 0:b86d15c6ba29 | 290 | #ifdef HAVE_SNI |
Vanger | 0:b86d15c6ba29 | 291 | NamedKey* namedKeys; /* mapping of names and keys */ |
Vanger | 0:b86d15c6ba29 | 292 | CyaSSL_Mutex namedKeysMutex; /* mutex for namedKey list */ |
Vanger | 0:b86d15c6ba29 | 293 | #endif |
Vanger | 0:b86d15c6ba29 | 294 | struct SnifferServer* next; /* for list */ |
Vanger | 0:b86d15c6ba29 | 295 | } SnifferServer; |
Vanger | 0:b86d15c6ba29 | 296 | |
Vanger | 0:b86d15c6ba29 | 297 | |
Vanger | 0:b86d15c6ba29 | 298 | /* Session Flags */ |
Vanger | 0:b86d15c6ba29 | 299 | typedef struct Flags { |
Vanger | 0:b86d15c6ba29 | 300 | byte side; /* which end is current packet headed */ |
Vanger | 0:b86d15c6ba29 | 301 | byte serverCipherOn; /* indicates whether cipher is active */ |
Vanger | 0:b86d15c6ba29 | 302 | byte clientCipherOn; /* indicates whether cipher is active */ |
Vanger | 0:b86d15c6ba29 | 303 | byte resuming; /* did this session come from resumption */ |
Vanger | 0:b86d15c6ba29 | 304 | byte cached; /* have we cached this session yet */ |
Vanger | 0:b86d15c6ba29 | 305 | byte clientHello; /* processed client hello yet, for SSLv2 */ |
Vanger | 0:b86d15c6ba29 | 306 | byte finCount; /* get both FINs before removing */ |
Vanger | 0:b86d15c6ba29 | 307 | byte fatalError; /* fatal error state */ |
Vanger | 0:b86d15c6ba29 | 308 | } Flags; |
Vanger | 0:b86d15c6ba29 | 309 | |
Vanger | 0:b86d15c6ba29 | 310 | |
Vanger | 0:b86d15c6ba29 | 311 | /* Out of Order FIN caputre */ |
Vanger | 0:b86d15c6ba29 | 312 | typedef struct FinCaputre { |
Vanger | 0:b86d15c6ba29 | 313 | word32 cliFinSeq; /* client relative sequence FIN 0 is no */ |
Vanger | 0:b86d15c6ba29 | 314 | word32 srvFinSeq; /* server relative sequence FIN, 0 is no */ |
Vanger | 0:b86d15c6ba29 | 315 | byte cliCounted; /* did we count yet, detects duplicates */ |
Vanger | 0:b86d15c6ba29 | 316 | byte srvCounted; /* did we count yet, detects duplicates */ |
Vanger | 0:b86d15c6ba29 | 317 | } FinCaputre; |
Vanger | 0:b86d15c6ba29 | 318 | |
Vanger | 0:b86d15c6ba29 | 319 | |
Vanger | 0:b86d15c6ba29 | 320 | /* Sniffer Session holds info for each client/server SSL/TLS session */ |
Vanger | 0:b86d15c6ba29 | 321 | typedef struct SnifferSession { |
Vanger | 0:b86d15c6ba29 | 322 | SnifferServer* context; /* server context */ |
Vanger | 0:b86d15c6ba29 | 323 | SSL* sslServer; /* SSL server side decode */ |
Vanger | 0:b86d15c6ba29 | 324 | SSL* sslClient; /* SSL client side decode */ |
Vanger | 0:b86d15c6ba29 | 325 | word32 server; /* server address in network byte order */ |
Vanger | 0:b86d15c6ba29 | 326 | word32 client; /* client address in network byte order */ |
Vanger | 0:b86d15c6ba29 | 327 | word16 srvPort; /* server port */ |
Vanger | 0:b86d15c6ba29 | 328 | word16 cliPort; /* client port */ |
Vanger | 0:b86d15c6ba29 | 329 | word32 cliSeqStart; /* client start sequence */ |
Vanger | 0:b86d15c6ba29 | 330 | word32 srvSeqStart; /* server start sequence */ |
Vanger | 0:b86d15c6ba29 | 331 | word32 cliExpected; /* client expected sequence (relative) */ |
Vanger | 0:b86d15c6ba29 | 332 | word32 srvExpected; /* server expected sequence (relative) */ |
Vanger | 0:b86d15c6ba29 | 333 | FinCaputre finCaputre; /* retain out of order FIN s */ |
Vanger | 0:b86d15c6ba29 | 334 | Flags flags; /* session flags */ |
Vanger | 0:b86d15c6ba29 | 335 | time_t lastUsed; /* last used ticks */ |
Vanger | 0:b86d15c6ba29 | 336 | PacketBuffer* cliReassemblyList; /* client out of order packets */ |
Vanger | 0:b86d15c6ba29 | 337 | PacketBuffer* srvReassemblyList; /* server out of order packets */ |
Vanger | 0:b86d15c6ba29 | 338 | struct SnifferSession* next; /* for hash table list */ |
Vanger | 0:b86d15c6ba29 | 339 | byte* ticketID; /* mac ID of session ticket */ |
Vanger | 0:b86d15c6ba29 | 340 | } SnifferSession; |
Vanger | 0:b86d15c6ba29 | 341 | |
Vanger | 0:b86d15c6ba29 | 342 | |
Vanger | 0:b86d15c6ba29 | 343 | /* Sniffer Server List and mutex */ |
Vanger | 0:b86d15c6ba29 | 344 | static SnifferServer* ServerList = 0; |
Vanger | 0:b86d15c6ba29 | 345 | static CyaSSL_Mutex ServerListMutex; |
Vanger | 0:b86d15c6ba29 | 346 | |
Vanger | 0:b86d15c6ba29 | 347 | |
Vanger | 0:b86d15c6ba29 | 348 | /* Session Hash Table, mutex, and count */ |
Vanger | 0:b86d15c6ba29 | 349 | static SnifferSession* SessionTable[HASH_SIZE]; |
Vanger | 0:b86d15c6ba29 | 350 | static CyaSSL_Mutex SessionMutex; |
Vanger | 0:b86d15c6ba29 | 351 | static int SessionCount = 0; |
Vanger | 0:b86d15c6ba29 | 352 | |
Vanger | 0:b86d15c6ba29 | 353 | |
Vanger | 0:b86d15c6ba29 | 354 | /* Initialize overall Sniffer */ |
Vanger | 0:b86d15c6ba29 | 355 | void ssl_InitSniffer(void) |
Vanger | 0:b86d15c6ba29 | 356 | { |
Vanger | 0:b86d15c6ba29 | 357 | CyaSSL_Init(); |
Vanger | 0:b86d15c6ba29 | 358 | InitMutex(&ServerListMutex); |
Vanger | 0:b86d15c6ba29 | 359 | InitMutex(&SessionMutex); |
Vanger | 0:b86d15c6ba29 | 360 | } |
Vanger | 0:b86d15c6ba29 | 361 | |
Vanger | 0:b86d15c6ba29 | 362 | |
Vanger | 0:b86d15c6ba29 | 363 | #ifdef HAVE_SNI |
Vanger | 0:b86d15c6ba29 | 364 | |
Vanger | 0:b86d15c6ba29 | 365 | /* Free Named Key and the zero out the private key it holds */ |
Vanger | 0:b86d15c6ba29 | 366 | static void FreeNamedKey(NamedKey* in) |
Vanger | 0:b86d15c6ba29 | 367 | { |
Vanger | 0:b86d15c6ba29 | 368 | if (in) { |
Vanger | 0:b86d15c6ba29 | 369 | if (in->key) { |
Vanger | 0:b86d15c6ba29 | 370 | XMEMSET(in->key, 0, in->keySz); |
Vanger | 0:b86d15c6ba29 | 371 | free(in->key); |
Vanger | 0:b86d15c6ba29 | 372 | } |
Vanger | 0:b86d15c6ba29 | 373 | free(in); |
Vanger | 0:b86d15c6ba29 | 374 | } |
Vanger | 0:b86d15c6ba29 | 375 | } |
Vanger | 0:b86d15c6ba29 | 376 | |
Vanger | 0:b86d15c6ba29 | 377 | |
Vanger | 0:b86d15c6ba29 | 378 | static void FreeNamedKeyList(NamedKey* in) |
Vanger | 0:b86d15c6ba29 | 379 | { |
Vanger | 0:b86d15c6ba29 | 380 | NamedKey* next; |
Vanger | 0:b86d15c6ba29 | 381 | |
Vanger | 0:b86d15c6ba29 | 382 | while (in) { |
Vanger | 0:b86d15c6ba29 | 383 | next = in->next; |
Vanger | 0:b86d15c6ba29 | 384 | FreeNamedKey(in); |
Vanger | 0:b86d15c6ba29 | 385 | in = next; |
Vanger | 0:b86d15c6ba29 | 386 | } |
Vanger | 0:b86d15c6ba29 | 387 | } |
Vanger | 0:b86d15c6ba29 | 388 | |
Vanger | 0:b86d15c6ba29 | 389 | #endif |
Vanger | 0:b86d15c6ba29 | 390 | |
Vanger | 0:b86d15c6ba29 | 391 | |
Vanger | 0:b86d15c6ba29 | 392 | /* Free Sniffer Server's resources/self */ |
Vanger | 0:b86d15c6ba29 | 393 | static void FreeSnifferServer(SnifferServer* srv) |
Vanger | 0:b86d15c6ba29 | 394 | { |
Vanger | 0:b86d15c6ba29 | 395 | if (srv) { |
Vanger | 0:b86d15c6ba29 | 396 | #ifdef HAVE_SNI |
Vanger | 0:b86d15c6ba29 | 397 | LockMutex(&srv->namedKeysMutex); |
Vanger | 0:b86d15c6ba29 | 398 | FreeNamedKeyList(srv->namedKeys); |
Vanger | 0:b86d15c6ba29 | 399 | UnLockMutex(&srv->namedKeysMutex); |
Vanger | 0:b86d15c6ba29 | 400 | FreeMutex(&srv->namedKeysMutex); |
Vanger | 0:b86d15c6ba29 | 401 | #endif |
Vanger | 0:b86d15c6ba29 | 402 | SSL_CTX_free(srv->ctx); |
Vanger | 0:b86d15c6ba29 | 403 | } |
Vanger | 0:b86d15c6ba29 | 404 | free(srv); |
Vanger | 0:b86d15c6ba29 | 405 | } |
Vanger | 0:b86d15c6ba29 | 406 | |
Vanger | 0:b86d15c6ba29 | 407 | |
Vanger | 0:b86d15c6ba29 | 408 | /* free PacketBuffer's resources/self */ |
Vanger | 0:b86d15c6ba29 | 409 | static void FreePacketBuffer(PacketBuffer* del) |
Vanger | 0:b86d15c6ba29 | 410 | { |
Vanger | 0:b86d15c6ba29 | 411 | if (del) { |
Vanger | 0:b86d15c6ba29 | 412 | free(del->data); |
Vanger | 0:b86d15c6ba29 | 413 | free(del); |
Vanger | 0:b86d15c6ba29 | 414 | } |
Vanger | 0:b86d15c6ba29 | 415 | } |
Vanger | 0:b86d15c6ba29 | 416 | |
Vanger | 0:b86d15c6ba29 | 417 | |
Vanger | 0:b86d15c6ba29 | 418 | /* remove PacketBuffer List */ |
Vanger | 0:b86d15c6ba29 | 419 | static void FreePacketList(PacketBuffer* in) |
Vanger | 0:b86d15c6ba29 | 420 | { |
Vanger | 0:b86d15c6ba29 | 421 | if (in) { |
Vanger | 0:b86d15c6ba29 | 422 | PacketBuffer* del; |
Vanger | 0:b86d15c6ba29 | 423 | PacketBuffer* packet = in; |
Vanger | 0:b86d15c6ba29 | 424 | |
Vanger | 0:b86d15c6ba29 | 425 | while (packet) { |
Vanger | 0:b86d15c6ba29 | 426 | del = packet; |
Vanger | 0:b86d15c6ba29 | 427 | packet = packet->next; |
Vanger | 0:b86d15c6ba29 | 428 | FreePacketBuffer(del); |
Vanger | 0:b86d15c6ba29 | 429 | } |
Vanger | 0:b86d15c6ba29 | 430 | } |
Vanger | 0:b86d15c6ba29 | 431 | } |
Vanger | 0:b86d15c6ba29 | 432 | |
Vanger | 0:b86d15c6ba29 | 433 | |
Vanger | 0:b86d15c6ba29 | 434 | /* Free Sniffer Session's resources/self */ |
Vanger | 0:b86d15c6ba29 | 435 | static void FreeSnifferSession(SnifferSession* session) |
Vanger | 0:b86d15c6ba29 | 436 | { |
Vanger | 0:b86d15c6ba29 | 437 | if (session) { |
Vanger | 0:b86d15c6ba29 | 438 | SSL_free(session->sslClient); |
Vanger | 0:b86d15c6ba29 | 439 | SSL_free(session->sslServer); |
Vanger | 0:b86d15c6ba29 | 440 | |
Vanger | 0:b86d15c6ba29 | 441 | FreePacketList(session->cliReassemblyList); |
Vanger | 0:b86d15c6ba29 | 442 | FreePacketList(session->srvReassemblyList); |
Vanger | 0:b86d15c6ba29 | 443 | |
Vanger | 0:b86d15c6ba29 | 444 | free(session->ticketID); |
Vanger | 0:b86d15c6ba29 | 445 | } |
Vanger | 0:b86d15c6ba29 | 446 | free(session); |
Vanger | 0:b86d15c6ba29 | 447 | } |
Vanger | 0:b86d15c6ba29 | 448 | |
Vanger | 0:b86d15c6ba29 | 449 | |
Vanger | 0:b86d15c6ba29 | 450 | /* Free overall Sniffer */ |
Vanger | 0:b86d15c6ba29 | 451 | void ssl_FreeSniffer(void) |
Vanger | 0:b86d15c6ba29 | 452 | { |
Vanger | 0:b86d15c6ba29 | 453 | SnifferServer* srv; |
Vanger | 0:b86d15c6ba29 | 454 | SnifferServer* removeServer; |
Vanger | 0:b86d15c6ba29 | 455 | SnifferSession* session; |
Vanger | 0:b86d15c6ba29 | 456 | SnifferSession* removeSession; |
Vanger | 0:b86d15c6ba29 | 457 | int i; |
Vanger | 0:b86d15c6ba29 | 458 | |
Vanger | 0:b86d15c6ba29 | 459 | LockMutex(&ServerListMutex); |
Vanger | 0:b86d15c6ba29 | 460 | LockMutex(&SessionMutex); |
Vanger | 0:b86d15c6ba29 | 461 | |
Vanger | 0:b86d15c6ba29 | 462 | srv = ServerList; |
Vanger | 0:b86d15c6ba29 | 463 | while (srv) { |
Vanger | 0:b86d15c6ba29 | 464 | removeServer = srv; |
Vanger | 0:b86d15c6ba29 | 465 | srv = srv->next; |
Vanger | 0:b86d15c6ba29 | 466 | FreeSnifferServer(removeServer); |
Vanger | 0:b86d15c6ba29 | 467 | } |
Vanger | 0:b86d15c6ba29 | 468 | |
Vanger | 0:b86d15c6ba29 | 469 | for (i = 0; i < HASH_SIZE; i++) { |
Vanger | 0:b86d15c6ba29 | 470 | session = SessionTable[i]; |
Vanger | 0:b86d15c6ba29 | 471 | while (session) { |
Vanger | 0:b86d15c6ba29 | 472 | removeSession = session; |
Vanger | 0:b86d15c6ba29 | 473 | session = session->next; |
Vanger | 0:b86d15c6ba29 | 474 | FreeSnifferSession(removeSession); |
Vanger | 0:b86d15c6ba29 | 475 | } |
Vanger | 0:b86d15c6ba29 | 476 | } |
Vanger | 0:b86d15c6ba29 | 477 | |
Vanger | 0:b86d15c6ba29 | 478 | UnLockMutex(&SessionMutex); |
Vanger | 0:b86d15c6ba29 | 479 | UnLockMutex(&ServerListMutex); |
Vanger | 0:b86d15c6ba29 | 480 | |
Vanger | 0:b86d15c6ba29 | 481 | FreeMutex(&SessionMutex); |
Vanger | 0:b86d15c6ba29 | 482 | FreeMutex(&ServerListMutex); |
Vanger | 0:b86d15c6ba29 | 483 | |
Vanger | 0:b86d15c6ba29 | 484 | if (TraceFile) { |
Vanger | 0:b86d15c6ba29 | 485 | TraceOn = 0; |
Vanger | 0:b86d15c6ba29 | 486 | fclose(TraceFile); |
Vanger | 0:b86d15c6ba29 | 487 | TraceFile = NULL; |
Vanger | 0:b86d15c6ba29 | 488 | } |
Vanger | 0:b86d15c6ba29 | 489 | |
Vanger | 0:b86d15c6ba29 | 490 | CyaSSL_Cleanup(); |
Vanger | 0:b86d15c6ba29 | 491 | } |
Vanger | 0:b86d15c6ba29 | 492 | |
Vanger | 0:b86d15c6ba29 | 493 | |
Vanger | 0:b86d15c6ba29 | 494 | /* Initialize a SnifferServer */ |
Vanger | 0:b86d15c6ba29 | 495 | static void InitSnifferServer(SnifferServer* sniffer) |
Vanger | 0:b86d15c6ba29 | 496 | { |
Vanger | 0:b86d15c6ba29 | 497 | sniffer->ctx = 0; |
Vanger | 0:b86d15c6ba29 | 498 | XMEMSET(sniffer->address, 0, MAX_SERVER_ADDRESS); |
Vanger | 0:b86d15c6ba29 | 499 | sniffer->server = 0; |
Vanger | 0:b86d15c6ba29 | 500 | sniffer->port = 0; |
Vanger | 0:b86d15c6ba29 | 501 | #ifdef HAVE_SNI |
Vanger | 0:b86d15c6ba29 | 502 | sniffer->namedKeys = 0; |
Vanger | 0:b86d15c6ba29 | 503 | InitMutex(&sniffer->namedKeysMutex); |
Vanger | 0:b86d15c6ba29 | 504 | #endif |
Vanger | 0:b86d15c6ba29 | 505 | sniffer->next = 0; |
Vanger | 0:b86d15c6ba29 | 506 | } |
Vanger | 0:b86d15c6ba29 | 507 | |
Vanger | 0:b86d15c6ba29 | 508 | |
Vanger | 0:b86d15c6ba29 | 509 | /* Initialize session flags */ |
Vanger | 0:b86d15c6ba29 | 510 | static void InitFlags(Flags* flags) |
Vanger | 0:b86d15c6ba29 | 511 | { |
Vanger | 0:b86d15c6ba29 | 512 | flags->side = 0; |
Vanger | 0:b86d15c6ba29 | 513 | flags->serverCipherOn = 0; |
Vanger | 0:b86d15c6ba29 | 514 | flags->clientCipherOn = 0; |
Vanger | 0:b86d15c6ba29 | 515 | flags->resuming = 0; |
Vanger | 0:b86d15c6ba29 | 516 | flags->cached = 0; |
Vanger | 0:b86d15c6ba29 | 517 | flags->clientHello = 0; |
Vanger | 0:b86d15c6ba29 | 518 | flags->finCount = 0; |
Vanger | 0:b86d15c6ba29 | 519 | flags->fatalError = 0; |
Vanger | 0:b86d15c6ba29 | 520 | } |
Vanger | 0:b86d15c6ba29 | 521 | |
Vanger | 0:b86d15c6ba29 | 522 | |
Vanger | 0:b86d15c6ba29 | 523 | /* Initialize FIN Capture */ |
Vanger | 0:b86d15c6ba29 | 524 | static void InitFinCapture(FinCaputre* cap) |
Vanger | 0:b86d15c6ba29 | 525 | { |
Vanger | 0:b86d15c6ba29 | 526 | cap->cliFinSeq = 0; |
Vanger | 0:b86d15c6ba29 | 527 | cap->srvFinSeq = 0; |
Vanger | 0:b86d15c6ba29 | 528 | cap->cliCounted = 0; |
Vanger | 0:b86d15c6ba29 | 529 | cap->srvCounted = 0; |
Vanger | 0:b86d15c6ba29 | 530 | } |
Vanger | 0:b86d15c6ba29 | 531 | |
Vanger | 0:b86d15c6ba29 | 532 | |
Vanger | 0:b86d15c6ba29 | 533 | /* Initialize a Sniffer Session */ |
Vanger | 0:b86d15c6ba29 | 534 | static void InitSession(SnifferSession* session) |
Vanger | 0:b86d15c6ba29 | 535 | { |
Vanger | 0:b86d15c6ba29 | 536 | session->context = 0; |
Vanger | 0:b86d15c6ba29 | 537 | session->sslServer = 0; |
Vanger | 0:b86d15c6ba29 | 538 | session->sslClient = 0; |
Vanger | 0:b86d15c6ba29 | 539 | session->server = 0; |
Vanger | 0:b86d15c6ba29 | 540 | session->client = 0; |
Vanger | 0:b86d15c6ba29 | 541 | session->srvPort = 0; |
Vanger | 0:b86d15c6ba29 | 542 | session->cliPort = 0; |
Vanger | 0:b86d15c6ba29 | 543 | session->cliSeqStart = 0; |
Vanger | 0:b86d15c6ba29 | 544 | session->srvSeqStart = 0; |
Vanger | 0:b86d15c6ba29 | 545 | session->cliExpected = 0; |
Vanger | 0:b86d15c6ba29 | 546 | session->srvExpected = 0; |
Vanger | 0:b86d15c6ba29 | 547 | session->lastUsed = 0; |
Vanger | 0:b86d15c6ba29 | 548 | session->cliReassemblyList = 0; |
Vanger | 0:b86d15c6ba29 | 549 | session->srvReassemblyList = 0; |
Vanger | 0:b86d15c6ba29 | 550 | session->next = 0; |
Vanger | 0:b86d15c6ba29 | 551 | session->ticketID = 0; |
Vanger | 0:b86d15c6ba29 | 552 | |
Vanger | 0:b86d15c6ba29 | 553 | InitFlags(&session->flags); |
Vanger | 0:b86d15c6ba29 | 554 | InitFinCapture(&session->finCaputre); |
Vanger | 0:b86d15c6ba29 | 555 | } |
Vanger | 0:b86d15c6ba29 | 556 | |
Vanger | 0:b86d15c6ba29 | 557 | |
Vanger | 0:b86d15c6ba29 | 558 | /* IP Info from IP Header */ |
Vanger | 0:b86d15c6ba29 | 559 | typedef struct IpInfo { |
Vanger | 0:b86d15c6ba29 | 560 | int length; /* length of this header */ |
Vanger | 0:b86d15c6ba29 | 561 | int total; /* total length of fragment */ |
Vanger | 0:b86d15c6ba29 | 562 | word32 src; /* network order source address */ |
Vanger | 0:b86d15c6ba29 | 563 | word32 dst; /* network order destination address */ |
Vanger | 0:b86d15c6ba29 | 564 | } IpInfo; |
Vanger | 0:b86d15c6ba29 | 565 | |
Vanger | 0:b86d15c6ba29 | 566 | |
Vanger | 0:b86d15c6ba29 | 567 | /* TCP Info from TCP Header */ |
Vanger | 0:b86d15c6ba29 | 568 | typedef struct TcpInfo { |
Vanger | 0:b86d15c6ba29 | 569 | int srcPort; /* source port */ |
Vanger | 0:b86d15c6ba29 | 570 | int dstPort; /* source port */ |
Vanger | 0:b86d15c6ba29 | 571 | int length; /* length of this header */ |
Vanger | 0:b86d15c6ba29 | 572 | word32 sequence; /* sequence number */ |
Vanger | 0:b86d15c6ba29 | 573 | word32 ackNumber; /* ack number */ |
Vanger | 0:b86d15c6ba29 | 574 | byte fin; /* FIN set */ |
Vanger | 0:b86d15c6ba29 | 575 | byte rst; /* RST set */ |
Vanger | 0:b86d15c6ba29 | 576 | byte syn; /* SYN set */ |
Vanger | 0:b86d15c6ba29 | 577 | byte ack; /* ACK set */ |
Vanger | 0:b86d15c6ba29 | 578 | } TcpInfo; |
Vanger | 0:b86d15c6ba29 | 579 | |
Vanger | 0:b86d15c6ba29 | 580 | |
Vanger | 0:b86d15c6ba29 | 581 | /* Tcp Pseudo Header for Checksum calculation */ |
Vanger | 0:b86d15c6ba29 | 582 | typedef struct TcpPseudoHdr { |
Vanger | 0:b86d15c6ba29 | 583 | word32 src; /* source address */ |
Vanger | 0:b86d15c6ba29 | 584 | word32 dst; /* destination address */ |
Vanger | 0:b86d15c6ba29 | 585 | byte rsv; /* reserved, always 0 */ |
Vanger | 0:b86d15c6ba29 | 586 | byte protocol; /* IP protocol */ |
Vanger | 0:b86d15c6ba29 | 587 | word16 legnth; /* tcp header length + data length (doesn't include */ |
Vanger | 0:b86d15c6ba29 | 588 | /* pseudo header length) network order */ |
Vanger | 0:b86d15c6ba29 | 589 | } TcpPseudoHdr; |
Vanger | 0:b86d15c6ba29 | 590 | |
Vanger | 0:b86d15c6ba29 | 591 | |
Vanger | 0:b86d15c6ba29 | 592 | /* Password Setting Callback */ |
Vanger | 0:b86d15c6ba29 | 593 | static int SetPassword(char* passwd, int sz, int rw, void* userdata) |
Vanger | 0:b86d15c6ba29 | 594 | { |
Vanger | 0:b86d15c6ba29 | 595 | (void)rw; |
Vanger | 0:b86d15c6ba29 | 596 | XSTRNCPY(passwd, (const char*)userdata, sz); |
Vanger | 0:b86d15c6ba29 | 597 | return (int)XSTRLEN((const char*)userdata); |
Vanger | 0:b86d15c6ba29 | 598 | } |
Vanger | 0:b86d15c6ba29 | 599 | |
Vanger | 0:b86d15c6ba29 | 600 | |
Vanger | 0:b86d15c6ba29 | 601 | /* Ethernet Header */ |
Vanger | 0:b86d15c6ba29 | 602 | typedef struct EthernetHdr { |
Vanger | 0:b86d15c6ba29 | 603 | byte dst[ETHER_IF_ADDR_LEN]; /* destination host address */ |
Vanger | 0:b86d15c6ba29 | 604 | byte src[ETHER_IF_ADDR_LEN]; /* source host address */ |
Vanger | 0:b86d15c6ba29 | 605 | word16 type; /* IP, ARP, etc */ |
Vanger | 0:b86d15c6ba29 | 606 | } EthernetHdr; |
Vanger | 0:b86d15c6ba29 | 607 | |
Vanger | 0:b86d15c6ba29 | 608 | |
Vanger | 0:b86d15c6ba29 | 609 | /* IP Header */ |
Vanger | 0:b86d15c6ba29 | 610 | typedef struct IpHdr { |
Vanger | 0:b86d15c6ba29 | 611 | byte ver_hl; /* version/header length */ |
Vanger | 0:b86d15c6ba29 | 612 | byte tos; /* type of service */ |
Vanger | 0:b86d15c6ba29 | 613 | word16 length; /* total length */ |
Vanger | 0:b86d15c6ba29 | 614 | word16 id; /* identification */ |
Vanger | 0:b86d15c6ba29 | 615 | word16 offset; /* fragment offset field */ |
Vanger | 0:b86d15c6ba29 | 616 | byte ttl; /* time to live */ |
Vanger | 0:b86d15c6ba29 | 617 | byte protocol; /* protocol */ |
Vanger | 0:b86d15c6ba29 | 618 | word16 sum; /* checksum */ |
Vanger | 0:b86d15c6ba29 | 619 | word32 src; /* source address */ |
Vanger | 0:b86d15c6ba29 | 620 | word32 dst; /* destination address */ |
Vanger | 0:b86d15c6ba29 | 621 | } IpHdr; |
Vanger | 0:b86d15c6ba29 | 622 | |
Vanger | 0:b86d15c6ba29 | 623 | |
Vanger | 0:b86d15c6ba29 | 624 | #define IP_HL(ip) ( (((ip)->ver_hl) & 0x0f) * 4) |
Vanger | 0:b86d15c6ba29 | 625 | #define IP_V(ip) ( ((ip)->ver_hl) >> 4) |
Vanger | 0:b86d15c6ba29 | 626 | |
Vanger | 0:b86d15c6ba29 | 627 | /* TCP Header */ |
Vanger | 0:b86d15c6ba29 | 628 | typedef struct TcpHdr { |
Vanger | 0:b86d15c6ba29 | 629 | word16 srcPort; /* source port */ |
Vanger | 0:b86d15c6ba29 | 630 | word16 dstPort; /* destination port */ |
Vanger | 0:b86d15c6ba29 | 631 | word32 sequence; /* sequence number */ |
Vanger | 0:b86d15c6ba29 | 632 | word32 ack; /* acknoledgment number */ |
Vanger | 0:b86d15c6ba29 | 633 | byte offset; /* data offset, reserved */ |
Vanger | 0:b86d15c6ba29 | 634 | byte flags; /* option flags */ |
Vanger | 0:b86d15c6ba29 | 635 | word16 window; /* window */ |
Vanger | 0:b86d15c6ba29 | 636 | word16 sum; /* checksum */ |
Vanger | 0:b86d15c6ba29 | 637 | word16 urgent; /* urgent pointer */ |
Vanger | 0:b86d15c6ba29 | 638 | } TcpHdr; |
Vanger | 0:b86d15c6ba29 | 639 | |
Vanger | 0:b86d15c6ba29 | 640 | #define TCP_LEN(tcp) ( (((tcp)->offset & 0xf0) >> 4) * 4) |
Vanger | 0:b86d15c6ba29 | 641 | #define TCP_FIN 0x01 |
Vanger | 0:b86d15c6ba29 | 642 | #define TCP_SYN 0x02 |
Vanger | 0:b86d15c6ba29 | 643 | #define TCP_RST 0x04 |
Vanger | 0:b86d15c6ba29 | 644 | #define TCP_ACK 0x10 |
Vanger | 0:b86d15c6ba29 | 645 | |
Vanger | 0:b86d15c6ba29 | 646 | |
Vanger | 0:b86d15c6ba29 | 647 | |
Vanger | 0:b86d15c6ba29 | 648 | |
Vanger | 0:b86d15c6ba29 | 649 | |
Vanger | 0:b86d15c6ba29 | 650 | /* Use platform specific GetError to write to tracfile if tracing */ |
Vanger | 0:b86d15c6ba29 | 651 | static void Trace(int idx) |
Vanger | 0:b86d15c6ba29 | 652 | { |
Vanger | 0:b86d15c6ba29 | 653 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 654 | char myBuffer[MAX_ERROR_LEN]; |
Vanger | 0:b86d15c6ba29 | 655 | GetError(idx, myBuffer); |
Vanger | 0:b86d15c6ba29 | 656 | fprintf(TraceFile, "\t%s\n", myBuffer); |
Vanger | 0:b86d15c6ba29 | 657 | #ifdef DEBUG_SNIFFER |
Vanger | 0:b86d15c6ba29 | 658 | fprintf(stderr, "\t%s\n", myBuffer); |
Vanger | 0:b86d15c6ba29 | 659 | #endif |
Vanger | 0:b86d15c6ba29 | 660 | } |
Vanger | 0:b86d15c6ba29 | 661 | } |
Vanger | 0:b86d15c6ba29 | 662 | |
Vanger | 0:b86d15c6ba29 | 663 | |
Vanger | 0:b86d15c6ba29 | 664 | /* Show TimeStamp for beginning of packet Trace */ |
Vanger | 0:b86d15c6ba29 | 665 | static void TraceHeader(void) |
Vanger | 0:b86d15c6ba29 | 666 | { |
Vanger | 0:b86d15c6ba29 | 667 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 668 | time_t ticks = time(NULL); |
Vanger | 0:b86d15c6ba29 | 669 | fprintf(TraceFile, "\n%s", ctime(&ticks)); |
Vanger | 0:b86d15c6ba29 | 670 | } |
Vanger | 0:b86d15c6ba29 | 671 | } |
Vanger | 0:b86d15c6ba29 | 672 | |
Vanger | 0:b86d15c6ba29 | 673 | |
Vanger | 0:b86d15c6ba29 | 674 | /* Show Set Server info for Trace */ |
Vanger | 0:b86d15c6ba29 | 675 | static void TraceSetServer(const char* srv, int port, const char* keyFile) |
Vanger | 0:b86d15c6ba29 | 676 | { |
Vanger | 0:b86d15c6ba29 | 677 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 678 | fprintf(TraceFile, "\tTrying to install a new Sniffer Server with\n"); |
Vanger | 0:b86d15c6ba29 | 679 | fprintf(TraceFile, "\tserver: %s, port: %d, keyFile: %s\n", srv, port, |
Vanger | 0:b86d15c6ba29 | 680 | keyFile); |
Vanger | 0:b86d15c6ba29 | 681 | } |
Vanger | 0:b86d15c6ba29 | 682 | } |
Vanger | 0:b86d15c6ba29 | 683 | |
Vanger | 0:b86d15c6ba29 | 684 | |
Vanger | 0:b86d15c6ba29 | 685 | #ifdef HAVE_SNI |
Vanger | 0:b86d15c6ba29 | 686 | |
Vanger | 0:b86d15c6ba29 | 687 | /* Show Set Named Server info for Trace */ |
Vanger | 0:b86d15c6ba29 | 688 | static void TraceSetNamedServer(const char* name, |
Vanger | 0:b86d15c6ba29 | 689 | const char* srv, int port, const char* keyFile) |
Vanger | 0:b86d15c6ba29 | 690 | { |
Vanger | 0:b86d15c6ba29 | 691 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 692 | fprintf(TraceFile, "\tTrying to install a new Sniffer Server with\n"); |
Vanger | 0:b86d15c6ba29 | 693 | fprintf(TraceFile, "\tname: %s, server: %s, port: %d, keyFile: %s\n", |
Vanger | 0:b86d15c6ba29 | 694 | name, srv, port, keyFile); |
Vanger | 0:b86d15c6ba29 | 695 | } |
Vanger | 0:b86d15c6ba29 | 696 | } |
Vanger | 0:b86d15c6ba29 | 697 | |
Vanger | 0:b86d15c6ba29 | 698 | #endif |
Vanger | 0:b86d15c6ba29 | 699 | |
Vanger | 0:b86d15c6ba29 | 700 | |
Vanger | 0:b86d15c6ba29 | 701 | /* Trace got packet number */ |
Vanger | 0:b86d15c6ba29 | 702 | static void TracePacket(void) |
Vanger | 0:b86d15c6ba29 | 703 | { |
Vanger | 0:b86d15c6ba29 | 704 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 705 | static word32 packetNumber = 0; |
Vanger | 0:b86d15c6ba29 | 706 | fprintf(TraceFile, "\tGot a Packet to decode, packet %u\n", |
Vanger | 0:b86d15c6ba29 | 707 | ++packetNumber); |
Vanger | 0:b86d15c6ba29 | 708 | } |
Vanger | 0:b86d15c6ba29 | 709 | } |
Vanger | 0:b86d15c6ba29 | 710 | |
Vanger | 0:b86d15c6ba29 | 711 | |
Vanger | 0:b86d15c6ba29 | 712 | /* Convert network byte order address into human readable */ |
Vanger | 0:b86d15c6ba29 | 713 | static char* IpToS(word32 addr, char* str) |
Vanger | 0:b86d15c6ba29 | 714 | { |
Vanger | 0:b86d15c6ba29 | 715 | byte* p = (byte*)&addr; |
Vanger | 0:b86d15c6ba29 | 716 | |
Vanger | 0:b86d15c6ba29 | 717 | SNPRINTF(str, TRACE_MSG_SZ, "%d.%d.%d.%d", p[0], p[1], p[2], p[3]); |
Vanger | 0:b86d15c6ba29 | 718 | |
Vanger | 0:b86d15c6ba29 | 719 | return str; |
Vanger | 0:b86d15c6ba29 | 720 | } |
Vanger | 0:b86d15c6ba29 | 721 | |
Vanger | 0:b86d15c6ba29 | 722 | |
Vanger | 0:b86d15c6ba29 | 723 | /* Show destination and source address from Ip Hdr for packet Trace */ |
Vanger | 0:b86d15c6ba29 | 724 | static void TraceIP(IpHdr* iphdr) |
Vanger | 0:b86d15c6ba29 | 725 | { |
Vanger | 0:b86d15c6ba29 | 726 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 727 | char src[TRACE_MSG_SZ]; |
Vanger | 0:b86d15c6ba29 | 728 | char dst[TRACE_MSG_SZ]; |
Vanger | 0:b86d15c6ba29 | 729 | fprintf(TraceFile, "\tdst:%s src:%s\n", IpToS(iphdr->dst, dst), |
Vanger | 0:b86d15c6ba29 | 730 | IpToS(iphdr->src, src)); |
Vanger | 0:b86d15c6ba29 | 731 | } |
Vanger | 0:b86d15c6ba29 | 732 | } |
Vanger | 0:b86d15c6ba29 | 733 | |
Vanger | 0:b86d15c6ba29 | 734 | |
Vanger | 0:b86d15c6ba29 | 735 | /* Show destination and source port from Tcp Hdr for packet Trace */ |
Vanger | 0:b86d15c6ba29 | 736 | static void TraceTcp(TcpHdr* tcphdr) |
Vanger | 0:b86d15c6ba29 | 737 | { |
Vanger | 0:b86d15c6ba29 | 738 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 739 | fprintf(TraceFile, "\tdstPort:%u srcPort:%u\n", ntohs(tcphdr->dstPort), |
Vanger | 0:b86d15c6ba29 | 740 | ntohs(tcphdr->srcPort)); |
Vanger | 0:b86d15c6ba29 | 741 | } |
Vanger | 0:b86d15c6ba29 | 742 | } |
Vanger | 0:b86d15c6ba29 | 743 | |
Vanger | 0:b86d15c6ba29 | 744 | |
Vanger | 0:b86d15c6ba29 | 745 | /* Show sequence and payload length for Trace */ |
Vanger | 0:b86d15c6ba29 | 746 | static void TraceSequence(word32 seq, int len) |
Vanger | 0:b86d15c6ba29 | 747 | { |
Vanger | 0:b86d15c6ba29 | 748 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 749 | fprintf(TraceFile, "\tSequence:%u, payload length:%d\n", seq, len); |
Vanger | 0:b86d15c6ba29 | 750 | } |
Vanger | 0:b86d15c6ba29 | 751 | } |
Vanger | 0:b86d15c6ba29 | 752 | |
Vanger | 0:b86d15c6ba29 | 753 | |
Vanger | 0:b86d15c6ba29 | 754 | /* Show sequence and payload length for Trace */ |
Vanger | 0:b86d15c6ba29 | 755 | static void TraceAck(word32 ack, word32 expected) |
Vanger | 0:b86d15c6ba29 | 756 | { |
Vanger | 0:b86d15c6ba29 | 757 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 758 | fprintf(TraceFile, "\tAck:%u Expected:%u\n", ack, expected); |
Vanger | 0:b86d15c6ba29 | 759 | } |
Vanger | 0:b86d15c6ba29 | 760 | } |
Vanger | 0:b86d15c6ba29 | 761 | |
Vanger | 0:b86d15c6ba29 | 762 | |
Vanger | 0:b86d15c6ba29 | 763 | /* Show relative expected and relative received sequences */ |
Vanger | 0:b86d15c6ba29 | 764 | static void TraceRelativeSequence(word32 expected, word32 got) |
Vanger | 0:b86d15c6ba29 | 765 | { |
Vanger | 0:b86d15c6ba29 | 766 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 767 | fprintf(TraceFile, "\tExpected sequence:%u, received sequence:%u\n", |
Vanger | 0:b86d15c6ba29 | 768 | expected, got); |
Vanger | 0:b86d15c6ba29 | 769 | } |
Vanger | 0:b86d15c6ba29 | 770 | } |
Vanger | 0:b86d15c6ba29 | 771 | |
Vanger | 0:b86d15c6ba29 | 772 | |
Vanger | 0:b86d15c6ba29 | 773 | /* Show server sequence startup from SYN */ |
Vanger | 0:b86d15c6ba29 | 774 | static void TraceServerSyn(word32 seq) |
Vanger | 0:b86d15c6ba29 | 775 | { |
Vanger | 0:b86d15c6ba29 | 776 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 777 | fprintf(TraceFile, "\tServer SYN, Sequence Start:%u\n", seq); |
Vanger | 0:b86d15c6ba29 | 778 | } |
Vanger | 0:b86d15c6ba29 | 779 | } |
Vanger | 0:b86d15c6ba29 | 780 | |
Vanger | 0:b86d15c6ba29 | 781 | |
Vanger | 0:b86d15c6ba29 | 782 | /* Show client sequence startup from SYN */ |
Vanger | 0:b86d15c6ba29 | 783 | static void TraceClientSyn(word32 seq) |
Vanger | 0:b86d15c6ba29 | 784 | { |
Vanger | 0:b86d15c6ba29 | 785 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 786 | fprintf(TraceFile, "\tClient SYN, Sequence Start:%u\n", seq); |
Vanger | 0:b86d15c6ba29 | 787 | } |
Vanger | 0:b86d15c6ba29 | 788 | } |
Vanger | 0:b86d15c6ba29 | 789 | |
Vanger | 0:b86d15c6ba29 | 790 | |
Vanger | 0:b86d15c6ba29 | 791 | /* Show client FIN capture */ |
Vanger | 0:b86d15c6ba29 | 792 | static void TraceClientFin(word32 finSeq, word32 relSeq) |
Vanger | 0:b86d15c6ba29 | 793 | { |
Vanger | 0:b86d15c6ba29 | 794 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 795 | fprintf(TraceFile, "\tClient FIN capture:%u, current SEQ:%u\n", |
Vanger | 0:b86d15c6ba29 | 796 | finSeq, relSeq); |
Vanger | 0:b86d15c6ba29 | 797 | } |
Vanger | 0:b86d15c6ba29 | 798 | } |
Vanger | 0:b86d15c6ba29 | 799 | |
Vanger | 0:b86d15c6ba29 | 800 | |
Vanger | 0:b86d15c6ba29 | 801 | /* Show server FIN capture */ |
Vanger | 0:b86d15c6ba29 | 802 | static void TraceServerFin(word32 finSeq, word32 relSeq) |
Vanger | 0:b86d15c6ba29 | 803 | { |
Vanger | 0:b86d15c6ba29 | 804 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 805 | fprintf(TraceFile, "\tServer FIN capture:%u, current SEQ:%u\n", |
Vanger | 0:b86d15c6ba29 | 806 | finSeq, relSeq); |
Vanger | 0:b86d15c6ba29 | 807 | } |
Vanger | 0:b86d15c6ba29 | 808 | } |
Vanger | 0:b86d15c6ba29 | 809 | |
Vanger | 0:b86d15c6ba29 | 810 | |
Vanger | 0:b86d15c6ba29 | 811 | /* Show number of SSL data bytes decoded, could be 0 (ok) */ |
Vanger | 0:b86d15c6ba29 | 812 | static void TraceGotData(int bytes) |
Vanger | 0:b86d15c6ba29 | 813 | { |
Vanger | 0:b86d15c6ba29 | 814 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 815 | fprintf(TraceFile, "\t%d bytes of SSL App data processed\n", bytes); |
Vanger | 0:b86d15c6ba29 | 816 | } |
Vanger | 0:b86d15c6ba29 | 817 | } |
Vanger | 0:b86d15c6ba29 | 818 | |
Vanger | 0:b86d15c6ba29 | 819 | |
Vanger | 0:b86d15c6ba29 | 820 | /* Show bytes added to old SSL App data */ |
Vanger | 0:b86d15c6ba29 | 821 | static void TraceAddedData(int newBytes, int existingBytes) |
Vanger | 0:b86d15c6ba29 | 822 | { |
Vanger | 0:b86d15c6ba29 | 823 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 824 | fprintf(TraceFile, |
Vanger | 0:b86d15c6ba29 | 825 | "\t%d bytes added to %d exisiting bytes in User Buffer\n", |
Vanger | 0:b86d15c6ba29 | 826 | newBytes, existingBytes); |
Vanger | 0:b86d15c6ba29 | 827 | } |
Vanger | 0:b86d15c6ba29 | 828 | } |
Vanger | 0:b86d15c6ba29 | 829 | |
Vanger | 0:b86d15c6ba29 | 830 | |
Vanger | 0:b86d15c6ba29 | 831 | /* Show Stale Session */ |
Vanger | 0:b86d15c6ba29 | 832 | static void TraceStaleSession(void) |
Vanger | 0:b86d15c6ba29 | 833 | { |
Vanger | 0:b86d15c6ba29 | 834 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 835 | fprintf(TraceFile, "\tFound a stale session\n"); |
Vanger | 0:b86d15c6ba29 | 836 | } |
Vanger | 0:b86d15c6ba29 | 837 | } |
Vanger | 0:b86d15c6ba29 | 838 | |
Vanger | 0:b86d15c6ba29 | 839 | |
Vanger | 0:b86d15c6ba29 | 840 | /* Show Finding Stale Sessions */ |
Vanger | 0:b86d15c6ba29 | 841 | static void TraceFindingStale(void) |
Vanger | 0:b86d15c6ba29 | 842 | { |
Vanger | 0:b86d15c6ba29 | 843 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 844 | fprintf(TraceFile, "\tTrying to find Stale Sessions\n"); |
Vanger | 0:b86d15c6ba29 | 845 | } |
Vanger | 0:b86d15c6ba29 | 846 | } |
Vanger | 0:b86d15c6ba29 | 847 | |
Vanger | 0:b86d15c6ba29 | 848 | |
Vanger | 0:b86d15c6ba29 | 849 | /* Show Removed Session */ |
Vanger | 0:b86d15c6ba29 | 850 | static void TraceRemovedSession(void) |
Vanger | 0:b86d15c6ba29 | 851 | { |
Vanger | 0:b86d15c6ba29 | 852 | if (TraceOn) { |
Vanger | 0:b86d15c6ba29 | 853 | fprintf(TraceFile, "\tRemoved it\n"); |
Vanger | 0:b86d15c6ba29 | 854 | } |
Vanger | 0:b86d15c6ba29 | 855 | } |
Vanger | 0:b86d15c6ba29 | 856 | |
Vanger | 0:b86d15c6ba29 | 857 | |
Vanger | 0:b86d15c6ba29 | 858 | /* Set user error string */ |
Vanger | 0:b86d15c6ba29 | 859 | static void SetError(int idx, char* error, SnifferSession* session, int fatal) |
Vanger | 0:b86d15c6ba29 | 860 | { |
Vanger | 0:b86d15c6ba29 | 861 | GetError(idx, error); |
Vanger | 0:b86d15c6ba29 | 862 | Trace(idx); |
Vanger | 0:b86d15c6ba29 | 863 | if (session && fatal == FATAL_ERROR_STATE) |
Vanger | 0:b86d15c6ba29 | 864 | session->flags.fatalError = 1; |
Vanger | 0:b86d15c6ba29 | 865 | } |
Vanger | 0:b86d15c6ba29 | 866 | |
Vanger | 0:b86d15c6ba29 | 867 | |
Vanger | 0:b86d15c6ba29 | 868 | /* See if this IPV4 network order address has been registered */ |
Vanger | 0:b86d15c6ba29 | 869 | /* return 1 is true, 0 is false */ |
Vanger | 0:b86d15c6ba29 | 870 | static int IsServerRegistered(word32 addr) |
Vanger | 0:b86d15c6ba29 | 871 | { |
Vanger | 0:b86d15c6ba29 | 872 | int ret = 0; /* false */ |
Vanger | 0:b86d15c6ba29 | 873 | SnifferServer* sniffer; |
Vanger | 0:b86d15c6ba29 | 874 | |
Vanger | 0:b86d15c6ba29 | 875 | LockMutex(&ServerListMutex); |
Vanger | 0:b86d15c6ba29 | 876 | |
Vanger | 0:b86d15c6ba29 | 877 | sniffer = ServerList; |
Vanger | 0:b86d15c6ba29 | 878 | while (sniffer) { |
Vanger | 0:b86d15c6ba29 | 879 | if (sniffer->server == addr) { |
Vanger | 0:b86d15c6ba29 | 880 | ret = 1; |
Vanger | 0:b86d15c6ba29 | 881 | break; |
Vanger | 0:b86d15c6ba29 | 882 | } |
Vanger | 0:b86d15c6ba29 | 883 | sniffer = sniffer->next; |
Vanger | 0:b86d15c6ba29 | 884 | } |
Vanger | 0:b86d15c6ba29 | 885 | |
Vanger | 0:b86d15c6ba29 | 886 | UnLockMutex(&ServerListMutex); |
Vanger | 0:b86d15c6ba29 | 887 | |
Vanger | 0:b86d15c6ba29 | 888 | return ret; |
Vanger | 0:b86d15c6ba29 | 889 | } |
Vanger | 0:b86d15c6ba29 | 890 | |
Vanger | 0:b86d15c6ba29 | 891 | |
Vanger | 0:b86d15c6ba29 | 892 | /* See if this port has been registered to watch */ |
Vanger | 0:b86d15c6ba29 | 893 | /* return 1 is true, 0 is false */ |
Vanger | 0:b86d15c6ba29 | 894 | static int IsPortRegistered(word32 port) |
Vanger | 0:b86d15c6ba29 | 895 | { |
Vanger | 0:b86d15c6ba29 | 896 | int ret = 0; /* false */ |
Vanger | 0:b86d15c6ba29 | 897 | SnifferServer* sniffer; |
Vanger | 0:b86d15c6ba29 | 898 | |
Vanger | 0:b86d15c6ba29 | 899 | LockMutex(&ServerListMutex); |
Vanger | 0:b86d15c6ba29 | 900 | |
Vanger | 0:b86d15c6ba29 | 901 | sniffer = ServerList; |
Vanger | 0:b86d15c6ba29 | 902 | while (sniffer) { |
Vanger | 0:b86d15c6ba29 | 903 | if (sniffer->port == (int)port) { |
Vanger | 0:b86d15c6ba29 | 904 | ret = 1; |
Vanger | 0:b86d15c6ba29 | 905 | break; |
Vanger | 0:b86d15c6ba29 | 906 | } |
Vanger | 0:b86d15c6ba29 | 907 | sniffer = sniffer->next; |
Vanger | 0:b86d15c6ba29 | 908 | } |
Vanger | 0:b86d15c6ba29 | 909 | |
Vanger | 0:b86d15c6ba29 | 910 | UnLockMutex(&ServerListMutex); |
Vanger | 0:b86d15c6ba29 | 911 | |
Vanger | 0:b86d15c6ba29 | 912 | return ret; |
Vanger | 0:b86d15c6ba29 | 913 | } |
Vanger | 0:b86d15c6ba29 | 914 | |
Vanger | 0:b86d15c6ba29 | 915 | |
Vanger | 0:b86d15c6ba29 | 916 | /* Get SnifferServer from IP and Port */ |
Vanger | 0:b86d15c6ba29 | 917 | static SnifferServer* GetSnifferServer(IpInfo* ipInfo, TcpInfo* tcpInfo) |
Vanger | 0:b86d15c6ba29 | 918 | { |
Vanger | 0:b86d15c6ba29 | 919 | SnifferServer* sniffer; |
Vanger | 0:b86d15c6ba29 | 920 | |
Vanger | 0:b86d15c6ba29 | 921 | LockMutex(&ServerListMutex); |
Vanger | 0:b86d15c6ba29 | 922 | |
Vanger | 0:b86d15c6ba29 | 923 | sniffer = ServerList; |
Vanger | 0:b86d15c6ba29 | 924 | while (sniffer) { |
Vanger | 0:b86d15c6ba29 | 925 | if (sniffer->port == tcpInfo->srcPort && sniffer->server == ipInfo->src) |
Vanger | 0:b86d15c6ba29 | 926 | break; |
Vanger | 0:b86d15c6ba29 | 927 | if (sniffer->port == tcpInfo->dstPort && sniffer->server == ipInfo->dst) |
Vanger | 0:b86d15c6ba29 | 928 | break; |
Vanger | 0:b86d15c6ba29 | 929 | sniffer = sniffer->next; |
Vanger | 0:b86d15c6ba29 | 930 | } |
Vanger | 0:b86d15c6ba29 | 931 | |
Vanger | 0:b86d15c6ba29 | 932 | UnLockMutex(&ServerListMutex); |
Vanger | 0:b86d15c6ba29 | 933 | |
Vanger | 0:b86d15c6ba29 | 934 | return sniffer; |
Vanger | 0:b86d15c6ba29 | 935 | } |
Vanger | 0:b86d15c6ba29 | 936 | |
Vanger | 0:b86d15c6ba29 | 937 | |
Vanger | 0:b86d15c6ba29 | 938 | /* Hash the Session Info, return hash row */ |
Vanger | 0:b86d15c6ba29 | 939 | static word32 SessionHash(IpInfo* ipInfo, TcpInfo* tcpInfo) |
Vanger | 0:b86d15c6ba29 | 940 | { |
Vanger | 0:b86d15c6ba29 | 941 | word32 hash = ipInfo->src * ipInfo->dst; |
Vanger | 0:b86d15c6ba29 | 942 | hash *= tcpInfo->srcPort * tcpInfo->dstPort; |
Vanger | 0:b86d15c6ba29 | 943 | |
Vanger | 0:b86d15c6ba29 | 944 | return hash % HASH_SIZE; |
Vanger | 0:b86d15c6ba29 | 945 | } |
Vanger | 0:b86d15c6ba29 | 946 | |
Vanger | 0:b86d15c6ba29 | 947 | |
Vanger | 0:b86d15c6ba29 | 948 | /* Get Exisiting SnifferSession from IP and Port */ |
Vanger | 0:b86d15c6ba29 | 949 | static SnifferSession* GetSnifferSession(IpInfo* ipInfo, TcpInfo* tcpInfo) |
Vanger | 0:b86d15c6ba29 | 950 | { |
Vanger | 0:b86d15c6ba29 | 951 | SnifferSession* session; |
Vanger | 0:b86d15c6ba29 | 952 | time_t currTime = time(NULL); |
Vanger | 0:b86d15c6ba29 | 953 | word32 row = SessionHash(ipInfo, tcpInfo); |
Vanger | 0:b86d15c6ba29 | 954 | |
Vanger | 0:b86d15c6ba29 | 955 | assert(row <= HASH_SIZE); |
Vanger | 0:b86d15c6ba29 | 956 | |
Vanger | 0:b86d15c6ba29 | 957 | LockMutex(&SessionMutex); |
Vanger | 0:b86d15c6ba29 | 958 | |
Vanger | 0:b86d15c6ba29 | 959 | session = SessionTable[row]; |
Vanger | 0:b86d15c6ba29 | 960 | while (session) { |
Vanger | 0:b86d15c6ba29 | 961 | if (session->server == ipInfo->src && session->client == ipInfo->dst && |
Vanger | 0:b86d15c6ba29 | 962 | session->srvPort == tcpInfo->srcPort && |
Vanger | 0:b86d15c6ba29 | 963 | session->cliPort == tcpInfo->dstPort) |
Vanger | 0:b86d15c6ba29 | 964 | break; |
Vanger | 0:b86d15c6ba29 | 965 | if (session->client == ipInfo->src && session->server == ipInfo->dst && |
Vanger | 0:b86d15c6ba29 | 966 | session->cliPort == tcpInfo->srcPort && |
Vanger | 0:b86d15c6ba29 | 967 | session->srvPort == tcpInfo->dstPort) |
Vanger | 0:b86d15c6ba29 | 968 | break; |
Vanger | 0:b86d15c6ba29 | 969 | |
Vanger | 0:b86d15c6ba29 | 970 | session = session->next; |
Vanger | 0:b86d15c6ba29 | 971 | } |
Vanger | 0:b86d15c6ba29 | 972 | |
Vanger | 0:b86d15c6ba29 | 973 | if (session) |
Vanger | 0:b86d15c6ba29 | 974 | session->lastUsed= currTime; /* keep session alive, remove stale will */ |
Vanger | 0:b86d15c6ba29 | 975 | /* leave alone */ |
Vanger | 0:b86d15c6ba29 | 976 | UnLockMutex(&SessionMutex); |
Vanger | 0:b86d15c6ba29 | 977 | |
Vanger | 0:b86d15c6ba29 | 978 | /* determine side */ |
Vanger | 0:b86d15c6ba29 | 979 | if (session) { |
Vanger | 0:b86d15c6ba29 | 980 | if (ipInfo->dst == session->context->server && |
Vanger | 0:b86d15c6ba29 | 981 | tcpInfo->dstPort == session->context->port) |
Vanger | 0:b86d15c6ba29 | 982 | session->flags.side = CYASSL_SERVER_END; |
Vanger | 0:b86d15c6ba29 | 983 | else |
Vanger | 0:b86d15c6ba29 | 984 | session->flags.side = CYASSL_CLIENT_END; |
Vanger | 0:b86d15c6ba29 | 985 | } |
Vanger | 0:b86d15c6ba29 | 986 | |
Vanger | 0:b86d15c6ba29 | 987 | return session; |
Vanger | 0:b86d15c6ba29 | 988 | } |
Vanger | 0:b86d15c6ba29 | 989 | |
Vanger | 0:b86d15c6ba29 | 990 | |
Vanger | 0:b86d15c6ba29 | 991 | #ifdef HAVE_SNI |
Vanger | 0:b86d15c6ba29 | 992 | |
Vanger | 0:b86d15c6ba29 | 993 | static int LoadKeyFile(byte** keyBuf, word32* keyBufSz, |
Vanger | 0:b86d15c6ba29 | 994 | const char* keyFile, int typeKey, |
Vanger | 0:b86d15c6ba29 | 995 | const char* password) |
Vanger | 0:b86d15c6ba29 | 996 | { |
Vanger | 0:b86d15c6ba29 | 997 | byte* loadBuf; |
Vanger | 0:b86d15c6ba29 | 998 | byte* saveBuf; |
Vanger | 0:b86d15c6ba29 | 999 | long fileSz = 0; |
Vanger | 0:b86d15c6ba29 | 1000 | int saveBufSz; |
Vanger | 0:b86d15c6ba29 | 1001 | XFILE file; |
Vanger | 0:b86d15c6ba29 | 1002 | int ret; |
Vanger | 0:b86d15c6ba29 | 1003 | |
Vanger | 0:b86d15c6ba29 | 1004 | if (keyBuf == NULL || keyBufSz == NULL || keyFile == NULL) { |
Vanger | 0:b86d15c6ba29 | 1005 | return -1; |
Vanger | 0:b86d15c6ba29 | 1006 | } |
Vanger | 0:b86d15c6ba29 | 1007 | |
Vanger | 0:b86d15c6ba29 | 1008 | file = XFOPEN(keyFile, "rb"); |
Vanger | 0:b86d15c6ba29 | 1009 | if (file == XBADFILE) return -1; |
Vanger | 0:b86d15c6ba29 | 1010 | XFSEEK(file, 0, XSEEK_END); |
Vanger | 0:b86d15c6ba29 | 1011 | fileSz = XFTELL(file); |
Vanger | 0:b86d15c6ba29 | 1012 | XREWIND(file); |
Vanger | 0:b86d15c6ba29 | 1013 | |
Vanger | 0:b86d15c6ba29 | 1014 | loadBuf = (byte*)malloc(fileSz); |
Vanger | 0:b86d15c6ba29 | 1015 | if (loadBuf == NULL) { |
Vanger | 0:b86d15c6ba29 | 1016 | XFCLOSE(file); |
Vanger | 0:b86d15c6ba29 | 1017 | return -1; |
Vanger | 0:b86d15c6ba29 | 1018 | } |
Vanger | 0:b86d15c6ba29 | 1019 | |
Vanger | 0:b86d15c6ba29 | 1020 | ret = (int)XFREAD(loadBuf, fileSz, 1, file); |
Vanger | 0:b86d15c6ba29 | 1021 | XFCLOSE(file); |
Vanger | 0:b86d15c6ba29 | 1022 | |
Vanger | 0:b86d15c6ba29 | 1023 | if (typeKey == SSL_FILETYPE_PEM) { |
Vanger | 0:b86d15c6ba29 | 1024 | saveBuf = (byte*)malloc(fileSz); |
Vanger | 0:b86d15c6ba29 | 1025 | |
Vanger | 0:b86d15c6ba29 | 1026 | saveBufSz = CyaSSL_KeyPemToDer(loadBuf, (int)fileSz, |
Vanger | 0:b86d15c6ba29 | 1027 | saveBuf, (int)fileSz, password); |
Vanger | 0:b86d15c6ba29 | 1028 | free(loadBuf); |
Vanger | 0:b86d15c6ba29 | 1029 | |
Vanger | 0:b86d15c6ba29 | 1030 | *keyBuf = saveBuf; |
Vanger | 0:b86d15c6ba29 | 1031 | *keyBufSz = (word32)saveBufSz; |
Vanger | 0:b86d15c6ba29 | 1032 | } |
Vanger | 0:b86d15c6ba29 | 1033 | else { |
Vanger | 0:b86d15c6ba29 | 1034 | *keyBuf = loadBuf; |
Vanger | 0:b86d15c6ba29 | 1035 | *keyBufSz = (word32)fileSz; |
Vanger | 0:b86d15c6ba29 | 1036 | } |
Vanger | 0:b86d15c6ba29 | 1037 | |
Vanger | 0:b86d15c6ba29 | 1038 | |
Vanger | 0:b86d15c6ba29 | 1039 | if (ret < 0) { |
Vanger | 0:b86d15c6ba29 | 1040 | return -1; |
Vanger | 0:b86d15c6ba29 | 1041 | } |
Vanger | 0:b86d15c6ba29 | 1042 | |
Vanger | 0:b86d15c6ba29 | 1043 | return ret; |
Vanger | 0:b86d15c6ba29 | 1044 | } |
Vanger | 0:b86d15c6ba29 | 1045 | |
Vanger | 0:b86d15c6ba29 | 1046 | #endif |
Vanger | 0:b86d15c6ba29 | 1047 | |
Vanger | 0:b86d15c6ba29 | 1048 | |
Vanger | 0:b86d15c6ba29 | 1049 | static int SetNamedPrivateKey(const char* name, const char* address, int port, |
Vanger | 0:b86d15c6ba29 | 1050 | const char* keyFile, int typeKey, const char* password, char* error) |
Vanger | 0:b86d15c6ba29 | 1051 | { |
Vanger | 0:b86d15c6ba29 | 1052 | SnifferServer* sniffer; |
Vanger | 0:b86d15c6ba29 | 1053 | int ret; |
Vanger | 0:b86d15c6ba29 | 1054 | int type = (typeKey == FILETYPE_PEM) ? SSL_FILETYPE_PEM : |
Vanger | 0:b86d15c6ba29 | 1055 | SSL_FILETYPE_ASN1; |
Vanger | 0:b86d15c6ba29 | 1056 | int isNew = 0; |
Vanger | 0:b86d15c6ba29 | 1057 | word32 serverIp; |
Vanger | 0:b86d15c6ba29 | 1058 | |
Vanger | 0:b86d15c6ba29 | 1059 | #ifdef HAVE_SNI |
Vanger | 0:b86d15c6ba29 | 1060 | NamedKey* namedKey = NULL; |
Vanger | 0:b86d15c6ba29 | 1061 | #endif |
Vanger | 0:b86d15c6ba29 | 1062 | |
Vanger | 0:b86d15c6ba29 | 1063 | (void)name; |
Vanger | 0:b86d15c6ba29 | 1064 | #ifdef HAVE_SNI |
Vanger | 0:b86d15c6ba29 | 1065 | if (name != NULL) { |
Vanger | 0:b86d15c6ba29 | 1066 | namedKey = (NamedKey*)malloc(sizeof(NamedKey)); |
Vanger | 0:b86d15c6ba29 | 1067 | if (namedKey == NULL) { |
Vanger | 0:b86d15c6ba29 | 1068 | SetError(MEMORY_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 1069 | return -1; |
Vanger | 0:b86d15c6ba29 | 1070 | } |
Vanger | 0:b86d15c6ba29 | 1071 | XMEMSET(namedKey, 0, sizeof(NamedKey)); |
Vanger | 0:b86d15c6ba29 | 1072 | |
Vanger | 0:b86d15c6ba29 | 1073 | namedKey->nameSz = (word32)strnlen(name, sizeof(namedKey->name)); |
Vanger | 0:b86d15c6ba29 | 1074 | strncpy(namedKey->name, name, sizeof(namedKey->name)); |
Vanger | 0:b86d15c6ba29 | 1075 | |
Vanger | 0:b86d15c6ba29 | 1076 | ret = LoadKeyFile(&namedKey->key, &namedKey->keySz, |
Vanger | 0:b86d15c6ba29 | 1077 | keyFile, type, password); |
Vanger | 0:b86d15c6ba29 | 1078 | if (ret < 0) { |
Vanger | 0:b86d15c6ba29 | 1079 | SetError(KEY_FILE_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 1080 | FreeNamedKey(namedKey); |
Vanger | 0:b86d15c6ba29 | 1081 | return -1; |
Vanger | 0:b86d15c6ba29 | 1082 | } |
Vanger | 0:b86d15c6ba29 | 1083 | } |
Vanger | 0:b86d15c6ba29 | 1084 | #endif |
Vanger | 0:b86d15c6ba29 | 1085 | |
Vanger | 0:b86d15c6ba29 | 1086 | serverIp = inet_addr(address); |
Vanger | 0:b86d15c6ba29 | 1087 | sniffer = ServerList; |
Vanger | 0:b86d15c6ba29 | 1088 | while (sniffer != NULL && |
Vanger | 0:b86d15c6ba29 | 1089 | (sniffer->server != serverIp || sniffer->port != port)) { |
Vanger | 0:b86d15c6ba29 | 1090 | sniffer = sniffer->next; |
Vanger | 0:b86d15c6ba29 | 1091 | } |
Vanger | 0:b86d15c6ba29 | 1092 | |
Vanger | 0:b86d15c6ba29 | 1093 | if (sniffer == NULL) { |
Vanger | 0:b86d15c6ba29 | 1094 | isNew = 1; |
Vanger | 0:b86d15c6ba29 | 1095 | sniffer = (SnifferServer*)malloc(sizeof(SnifferServer)); |
Vanger | 0:b86d15c6ba29 | 1096 | if (sniffer == NULL) { |
Vanger | 0:b86d15c6ba29 | 1097 | SetError(MEMORY_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 1098 | #ifdef HAVE_SNI |
Vanger | 0:b86d15c6ba29 | 1099 | FreeNamedKey(namedKey); |
Vanger | 0:b86d15c6ba29 | 1100 | #endif |
Vanger | 0:b86d15c6ba29 | 1101 | return -1; |
Vanger | 0:b86d15c6ba29 | 1102 | } |
Vanger | 0:b86d15c6ba29 | 1103 | InitSnifferServer(sniffer); |
Vanger | 0:b86d15c6ba29 | 1104 | |
Vanger | 0:b86d15c6ba29 | 1105 | XSTRNCPY(sniffer->address, address, MAX_SERVER_ADDRESS-1); |
Vanger | 0:b86d15c6ba29 | 1106 | sniffer->address[MAX_SERVER_ADDRESS-1] = '\0'; |
Vanger | 0:b86d15c6ba29 | 1107 | sniffer->server = serverIp; |
Vanger | 0:b86d15c6ba29 | 1108 | sniffer->port = port; |
Vanger | 0:b86d15c6ba29 | 1109 | |
Vanger | 0:b86d15c6ba29 | 1110 | sniffer->ctx = SSL_CTX_new(SSLv3_client_method()); |
Vanger | 0:b86d15c6ba29 | 1111 | if (!sniffer->ctx) { |
Vanger | 0:b86d15c6ba29 | 1112 | SetError(MEMORY_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 1113 | #ifdef HAVE_SNI |
Vanger | 0:b86d15c6ba29 | 1114 | FreeNamedKey(namedKey); |
Vanger | 0:b86d15c6ba29 | 1115 | #endif |
Vanger | 0:b86d15c6ba29 | 1116 | FreeSnifferServer(sniffer); |
Vanger | 0:b86d15c6ba29 | 1117 | return -1; |
Vanger | 0:b86d15c6ba29 | 1118 | } |
Vanger | 0:b86d15c6ba29 | 1119 | } |
Vanger | 0:b86d15c6ba29 | 1120 | |
Vanger | 0:b86d15c6ba29 | 1121 | if (name == NULL) { |
Vanger | 0:b86d15c6ba29 | 1122 | if (password) { |
Vanger | 0:b86d15c6ba29 | 1123 | SSL_CTX_set_default_passwd_cb(sniffer->ctx, SetPassword); |
Vanger | 0:b86d15c6ba29 | 1124 | SSL_CTX_set_default_passwd_cb_userdata( |
Vanger | 0:b86d15c6ba29 | 1125 | sniffer->ctx, (void*)password); |
Vanger | 0:b86d15c6ba29 | 1126 | } |
Vanger | 0:b86d15c6ba29 | 1127 | ret = SSL_CTX_use_PrivateKey_file(sniffer->ctx, keyFile, type); |
Vanger | 0:b86d15c6ba29 | 1128 | if (ret != SSL_SUCCESS) { |
Vanger | 0:b86d15c6ba29 | 1129 | SetError(KEY_FILE_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 1130 | if (isNew) |
Vanger | 0:b86d15c6ba29 | 1131 | FreeSnifferServer(sniffer); |
Vanger | 0:b86d15c6ba29 | 1132 | return -1; |
Vanger | 0:b86d15c6ba29 | 1133 | } |
Vanger | 0:b86d15c6ba29 | 1134 | } |
Vanger | 0:b86d15c6ba29 | 1135 | #ifdef HAVE_SNI |
Vanger | 0:b86d15c6ba29 | 1136 | else { |
Vanger | 0:b86d15c6ba29 | 1137 | LockMutex(&sniffer->namedKeysMutex); |
Vanger | 0:b86d15c6ba29 | 1138 | namedKey->next = sniffer->namedKeys; |
Vanger | 0:b86d15c6ba29 | 1139 | sniffer->namedKeys = namedKey; |
Vanger | 0:b86d15c6ba29 | 1140 | UnLockMutex(&sniffer->namedKeysMutex); |
Vanger | 0:b86d15c6ba29 | 1141 | } |
Vanger | 0:b86d15c6ba29 | 1142 | #endif |
Vanger | 0:b86d15c6ba29 | 1143 | |
Vanger | 0:b86d15c6ba29 | 1144 | if (isNew) { |
Vanger | 0:b86d15c6ba29 | 1145 | sniffer->next = ServerList; |
Vanger | 0:b86d15c6ba29 | 1146 | ServerList = sniffer; |
Vanger | 0:b86d15c6ba29 | 1147 | } |
Vanger | 0:b86d15c6ba29 | 1148 | |
Vanger | 0:b86d15c6ba29 | 1149 | return 0; |
Vanger | 0:b86d15c6ba29 | 1150 | } |
Vanger | 0:b86d15c6ba29 | 1151 | |
Vanger | 0:b86d15c6ba29 | 1152 | |
Vanger | 0:b86d15c6ba29 | 1153 | #ifdef HAVE_SNI |
Vanger | 0:b86d15c6ba29 | 1154 | |
Vanger | 0:b86d15c6ba29 | 1155 | /* Sets the private key for a specific name, server and port */ |
Vanger | 0:b86d15c6ba29 | 1156 | /* returns 0 on success, -1 on error */ |
Vanger | 0:b86d15c6ba29 | 1157 | int ssl_SetNamedPrivateKey(const char* name, |
Vanger | 0:b86d15c6ba29 | 1158 | const char* address, int port, |
Vanger | 0:b86d15c6ba29 | 1159 | const char* keyFile, int typeKey, |
Vanger | 0:b86d15c6ba29 | 1160 | const char* password, char* error) |
Vanger | 0:b86d15c6ba29 | 1161 | { |
Vanger | 0:b86d15c6ba29 | 1162 | int ret; |
Vanger | 0:b86d15c6ba29 | 1163 | |
Vanger | 0:b86d15c6ba29 | 1164 | TraceHeader(); |
Vanger | 0:b86d15c6ba29 | 1165 | TraceSetNamedServer(name, address, port, keyFile); |
Vanger | 0:b86d15c6ba29 | 1166 | |
Vanger | 0:b86d15c6ba29 | 1167 | LockMutex(&ServerListMutex); |
Vanger | 0:b86d15c6ba29 | 1168 | ret = SetNamedPrivateKey(name, address, port, keyFile, |
Vanger | 0:b86d15c6ba29 | 1169 | typeKey, password, error); |
Vanger | 0:b86d15c6ba29 | 1170 | UnLockMutex(&ServerListMutex); |
Vanger | 0:b86d15c6ba29 | 1171 | |
Vanger | 0:b86d15c6ba29 | 1172 | if (ret == 0) |
Vanger | 0:b86d15c6ba29 | 1173 | Trace(NEW_SERVER_STR); |
Vanger | 0:b86d15c6ba29 | 1174 | |
Vanger | 0:b86d15c6ba29 | 1175 | return ret; |
Vanger | 0:b86d15c6ba29 | 1176 | } |
Vanger | 0:b86d15c6ba29 | 1177 | |
Vanger | 0:b86d15c6ba29 | 1178 | #endif |
Vanger | 0:b86d15c6ba29 | 1179 | |
Vanger | 0:b86d15c6ba29 | 1180 | |
Vanger | 0:b86d15c6ba29 | 1181 | /* Sets the private key for a specific server and port */ |
Vanger | 0:b86d15c6ba29 | 1182 | /* returns 0 on success, -1 on error */ |
Vanger | 0:b86d15c6ba29 | 1183 | int ssl_SetPrivateKey(const char* address, int port, const char* keyFile, |
Vanger | 0:b86d15c6ba29 | 1184 | int typeKey, const char* password, char* error) |
Vanger | 0:b86d15c6ba29 | 1185 | { |
Vanger | 0:b86d15c6ba29 | 1186 | int ret; |
Vanger | 0:b86d15c6ba29 | 1187 | |
Vanger | 0:b86d15c6ba29 | 1188 | TraceHeader(); |
Vanger | 0:b86d15c6ba29 | 1189 | TraceSetServer(address, port, keyFile); |
Vanger | 0:b86d15c6ba29 | 1190 | |
Vanger | 0:b86d15c6ba29 | 1191 | LockMutex(&ServerListMutex); |
Vanger | 0:b86d15c6ba29 | 1192 | ret = SetNamedPrivateKey(NULL, address, port, keyFile, |
Vanger | 0:b86d15c6ba29 | 1193 | typeKey, password, error); |
Vanger | 0:b86d15c6ba29 | 1194 | UnLockMutex(&ServerListMutex); |
Vanger | 0:b86d15c6ba29 | 1195 | |
Vanger | 0:b86d15c6ba29 | 1196 | if (ret == 0) |
Vanger | 0:b86d15c6ba29 | 1197 | Trace(NEW_SERVER_STR); |
Vanger | 0:b86d15c6ba29 | 1198 | |
Vanger | 0:b86d15c6ba29 | 1199 | return ret; |
Vanger | 0:b86d15c6ba29 | 1200 | } |
Vanger | 0:b86d15c6ba29 | 1201 | |
Vanger | 0:b86d15c6ba29 | 1202 | |
Vanger | 0:b86d15c6ba29 | 1203 | /* Check IP Header for IPV4, TCP, and a registered server address */ |
Vanger | 0:b86d15c6ba29 | 1204 | /* returns 0 on success, -1 on error */ |
Vanger | 0:b86d15c6ba29 | 1205 | static int CheckIpHdr(IpHdr* iphdr, IpInfo* info, int length, char* error) |
Vanger | 0:b86d15c6ba29 | 1206 | { |
Vanger | 0:b86d15c6ba29 | 1207 | int version = IP_V(iphdr); |
Vanger | 0:b86d15c6ba29 | 1208 | |
Vanger | 0:b86d15c6ba29 | 1209 | TraceIP(iphdr); |
Vanger | 0:b86d15c6ba29 | 1210 | Trace(IP_CHECK_STR); |
Vanger | 0:b86d15c6ba29 | 1211 | |
Vanger | 0:b86d15c6ba29 | 1212 | if (version != IPV4) { |
Vanger | 0:b86d15c6ba29 | 1213 | SetError(BAD_IPVER_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 1214 | return -1; |
Vanger | 0:b86d15c6ba29 | 1215 | } |
Vanger | 0:b86d15c6ba29 | 1216 | |
Vanger | 0:b86d15c6ba29 | 1217 | if (iphdr->protocol != TCP_PROTOCOL) { |
Vanger | 0:b86d15c6ba29 | 1218 | SetError(BAD_PROTO_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 1219 | return -1; |
Vanger | 0:b86d15c6ba29 | 1220 | } |
Vanger | 0:b86d15c6ba29 | 1221 | |
Vanger | 0:b86d15c6ba29 | 1222 | if (!IsServerRegistered(iphdr->src) && !IsServerRegistered(iphdr->dst)) { |
Vanger | 0:b86d15c6ba29 | 1223 | SetError(SERVER_NOT_REG_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 1224 | return -1; |
Vanger | 0:b86d15c6ba29 | 1225 | } |
Vanger | 0:b86d15c6ba29 | 1226 | |
Vanger | 0:b86d15c6ba29 | 1227 | info->length = IP_HL(iphdr); |
Vanger | 0:b86d15c6ba29 | 1228 | info->total = ntohs(iphdr->length); |
Vanger | 0:b86d15c6ba29 | 1229 | info->src = iphdr->src; |
Vanger | 0:b86d15c6ba29 | 1230 | info->dst = iphdr->dst; |
Vanger | 0:b86d15c6ba29 | 1231 | |
Vanger | 0:b86d15c6ba29 | 1232 | if (info->total == 0) |
Vanger | 0:b86d15c6ba29 | 1233 | info->total = length; /* reassembled may be off */ |
Vanger | 0:b86d15c6ba29 | 1234 | |
Vanger | 0:b86d15c6ba29 | 1235 | return 0; |
Vanger | 0:b86d15c6ba29 | 1236 | } |
Vanger | 0:b86d15c6ba29 | 1237 | |
Vanger | 0:b86d15c6ba29 | 1238 | |
Vanger | 0:b86d15c6ba29 | 1239 | /* Check TCP Header for a registered port */ |
Vanger | 0:b86d15c6ba29 | 1240 | /* returns 0 on success, -1 on error */ |
Vanger | 0:b86d15c6ba29 | 1241 | static int CheckTcpHdr(TcpHdr* tcphdr, TcpInfo* info, char* error) |
Vanger | 0:b86d15c6ba29 | 1242 | { |
Vanger | 0:b86d15c6ba29 | 1243 | TraceTcp(tcphdr); |
Vanger | 0:b86d15c6ba29 | 1244 | Trace(TCP_CHECK_STR); |
Vanger | 0:b86d15c6ba29 | 1245 | info->srcPort = ntohs(tcphdr->srcPort); |
Vanger | 0:b86d15c6ba29 | 1246 | info->dstPort = ntohs(tcphdr->dstPort); |
Vanger | 0:b86d15c6ba29 | 1247 | info->length = TCP_LEN(tcphdr); |
Vanger | 0:b86d15c6ba29 | 1248 | info->sequence = ntohl(tcphdr->sequence); |
Vanger | 0:b86d15c6ba29 | 1249 | info->fin = tcphdr->flags & TCP_FIN; |
Vanger | 0:b86d15c6ba29 | 1250 | info->rst = tcphdr->flags & TCP_RST; |
Vanger | 0:b86d15c6ba29 | 1251 | info->syn = tcphdr->flags & TCP_SYN; |
Vanger | 0:b86d15c6ba29 | 1252 | info->ack = tcphdr->flags & TCP_ACK; |
Vanger | 0:b86d15c6ba29 | 1253 | if (info->ack) |
Vanger | 0:b86d15c6ba29 | 1254 | info->ackNumber = ntohl(tcphdr->ack); |
Vanger | 0:b86d15c6ba29 | 1255 | |
Vanger | 0:b86d15c6ba29 | 1256 | if (!IsPortRegistered(info->srcPort) && !IsPortRegistered(info->dstPort)) { |
Vanger | 0:b86d15c6ba29 | 1257 | SetError(SERVER_PORT_NOT_REG_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 1258 | return -1; |
Vanger | 0:b86d15c6ba29 | 1259 | } |
Vanger | 0:b86d15c6ba29 | 1260 | |
Vanger | 0:b86d15c6ba29 | 1261 | return 0; |
Vanger | 0:b86d15c6ba29 | 1262 | } |
Vanger | 0:b86d15c6ba29 | 1263 | |
Vanger | 0:b86d15c6ba29 | 1264 | |
Vanger | 0:b86d15c6ba29 | 1265 | /* Decode Record Layer Header */ |
Vanger | 0:b86d15c6ba29 | 1266 | static int GetRecordHeader(const byte* input, RecordLayerHeader* rh, int* size) |
Vanger | 0:b86d15c6ba29 | 1267 | { |
Vanger | 0:b86d15c6ba29 | 1268 | XMEMCPY(rh, input, RECORD_HEADER_SZ); |
Vanger | 0:b86d15c6ba29 | 1269 | *size = (rh->length[0] << 8) | rh->length[1]; |
Vanger | 0:b86d15c6ba29 | 1270 | |
Vanger | 0:b86d15c6ba29 | 1271 | if (*size > (MAX_RECORD_SIZE + COMP_EXTRA + MAX_MSG_EXTRA)) |
Vanger | 0:b86d15c6ba29 | 1272 | return LENGTH_ERROR; |
Vanger | 0:b86d15c6ba29 | 1273 | |
Vanger | 0:b86d15c6ba29 | 1274 | return 0; |
Vanger | 0:b86d15c6ba29 | 1275 | } |
Vanger | 0:b86d15c6ba29 | 1276 | |
Vanger | 0:b86d15c6ba29 | 1277 | |
Vanger | 0:b86d15c6ba29 | 1278 | /* Process Client Key Exchange, RSA only */ |
Vanger | 0:b86d15c6ba29 | 1279 | static int ProcessClientKeyExchange(const byte* input, int* sslBytes, |
Vanger | 0:b86d15c6ba29 | 1280 | SnifferSession* session, char* error) |
Vanger | 0:b86d15c6ba29 | 1281 | { |
Vanger | 0:b86d15c6ba29 | 1282 | word32 idx = 0; |
Vanger | 0:b86d15c6ba29 | 1283 | RsaKey key; |
Vanger | 0:b86d15c6ba29 | 1284 | int ret; |
Vanger | 0:b86d15c6ba29 | 1285 | |
Vanger | 0:b86d15c6ba29 | 1286 | ret = InitRsaKey(&key, 0); |
Vanger | 0:b86d15c6ba29 | 1287 | if (ret == 0) |
Vanger | 0:b86d15c6ba29 | 1288 | ret = RsaPrivateKeyDecode(session->sslServer->buffers.key.buffer, |
Vanger | 0:b86d15c6ba29 | 1289 | &idx, &key, session->sslServer->buffers.key.length); |
Vanger | 0:b86d15c6ba29 | 1290 | if (ret == 0) { |
Vanger | 0:b86d15c6ba29 | 1291 | int length = RsaEncryptSize(&key); |
Vanger | 0:b86d15c6ba29 | 1292 | |
Vanger | 0:b86d15c6ba29 | 1293 | if (IsTLS(session->sslServer)) |
Vanger | 0:b86d15c6ba29 | 1294 | input += 2; /* tls pre length */ |
Vanger | 0:b86d15c6ba29 | 1295 | |
Vanger | 0:b86d15c6ba29 | 1296 | if (length > *sslBytes) { |
Vanger | 0:b86d15c6ba29 | 1297 | SetError(PARTIAL_INPUT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1298 | FreeRsaKey(&key); |
Vanger | 0:b86d15c6ba29 | 1299 | return -1; |
Vanger | 0:b86d15c6ba29 | 1300 | } |
Vanger | 0:b86d15c6ba29 | 1301 | ret = RsaPrivateDecrypt(input, length, |
Vanger | 0:b86d15c6ba29 | 1302 | session->sslServer->arrays->preMasterSecret,SECRET_LEN, &key); |
Vanger | 0:b86d15c6ba29 | 1303 | |
Vanger | 0:b86d15c6ba29 | 1304 | if (ret != SECRET_LEN) { |
Vanger | 0:b86d15c6ba29 | 1305 | SetError(RSA_DECRYPT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1306 | FreeRsaKey(&key); |
Vanger | 0:b86d15c6ba29 | 1307 | return -1; |
Vanger | 0:b86d15c6ba29 | 1308 | } |
Vanger | 0:b86d15c6ba29 | 1309 | ret = 0; /* not in error state */ |
Vanger | 0:b86d15c6ba29 | 1310 | session->sslServer->arrays->preMasterSz = SECRET_LEN; |
Vanger | 0:b86d15c6ba29 | 1311 | |
Vanger | 0:b86d15c6ba29 | 1312 | /* store for client side as well */ |
Vanger | 0:b86d15c6ba29 | 1313 | XMEMCPY(session->sslClient->arrays->preMasterSecret, |
Vanger | 0:b86d15c6ba29 | 1314 | session->sslServer->arrays->preMasterSecret, SECRET_LEN); |
Vanger | 0:b86d15c6ba29 | 1315 | session->sslClient->arrays->preMasterSz = SECRET_LEN; |
Vanger | 0:b86d15c6ba29 | 1316 | |
Vanger | 0:b86d15c6ba29 | 1317 | #ifdef SHOW_SECRETS |
Vanger | 0:b86d15c6ba29 | 1318 | { |
Vanger | 0:b86d15c6ba29 | 1319 | int i; |
Vanger | 0:b86d15c6ba29 | 1320 | printf("pre master secret: "); |
Vanger | 0:b86d15c6ba29 | 1321 | for (i = 0; i < SECRET_LEN; i++) |
Vanger | 0:b86d15c6ba29 | 1322 | printf("%02x", session->sslServer->arrays->preMasterSecret[i]); |
Vanger | 0:b86d15c6ba29 | 1323 | printf("\n"); |
Vanger | 0:b86d15c6ba29 | 1324 | } |
Vanger | 0:b86d15c6ba29 | 1325 | #endif |
Vanger | 0:b86d15c6ba29 | 1326 | } |
Vanger | 0:b86d15c6ba29 | 1327 | else { |
Vanger | 0:b86d15c6ba29 | 1328 | SetError(RSA_DECODE_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1329 | FreeRsaKey(&key); |
Vanger | 0:b86d15c6ba29 | 1330 | return -1; |
Vanger | 0:b86d15c6ba29 | 1331 | } |
Vanger | 0:b86d15c6ba29 | 1332 | |
Vanger | 0:b86d15c6ba29 | 1333 | if (SetCipherSpecs(session->sslServer) != 0) { |
Vanger | 0:b86d15c6ba29 | 1334 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1335 | FreeRsaKey(&key); |
Vanger | 0:b86d15c6ba29 | 1336 | return -1; |
Vanger | 0:b86d15c6ba29 | 1337 | } |
Vanger | 0:b86d15c6ba29 | 1338 | |
Vanger | 0:b86d15c6ba29 | 1339 | if (SetCipherSpecs(session->sslClient) != 0) { |
Vanger | 0:b86d15c6ba29 | 1340 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1341 | FreeRsaKey(&key); |
Vanger | 0:b86d15c6ba29 | 1342 | return -1; |
Vanger | 0:b86d15c6ba29 | 1343 | } |
Vanger | 0:b86d15c6ba29 | 1344 | |
Vanger | 0:b86d15c6ba29 | 1345 | ret = MakeMasterSecret(session->sslServer); |
Vanger | 0:b86d15c6ba29 | 1346 | ret += MakeMasterSecret(session->sslClient); |
Vanger | 0:b86d15c6ba29 | 1347 | ret += SetKeysSide(session->sslServer, ENCRYPT_AND_DECRYPT_SIDE); |
Vanger | 0:b86d15c6ba29 | 1348 | ret += SetKeysSide(session->sslClient, ENCRYPT_AND_DECRYPT_SIDE); |
Vanger | 0:b86d15c6ba29 | 1349 | |
Vanger | 0:b86d15c6ba29 | 1350 | if (ret != 0) { |
Vanger | 0:b86d15c6ba29 | 1351 | SetError(BAD_DERIVE_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1352 | return -1; |
Vanger | 0:b86d15c6ba29 | 1353 | } |
Vanger | 0:b86d15c6ba29 | 1354 | |
Vanger | 0:b86d15c6ba29 | 1355 | #ifdef SHOW_SECRETS |
Vanger | 0:b86d15c6ba29 | 1356 | { |
Vanger | 0:b86d15c6ba29 | 1357 | int i; |
Vanger | 0:b86d15c6ba29 | 1358 | printf("server master secret: "); |
Vanger | 0:b86d15c6ba29 | 1359 | for (i = 0; i < SECRET_LEN; i++) |
Vanger | 0:b86d15c6ba29 | 1360 | printf("%02x", session->sslServer->arrays->masterSecret[i]); |
Vanger | 0:b86d15c6ba29 | 1361 | printf("\n"); |
Vanger | 0:b86d15c6ba29 | 1362 | |
Vanger | 0:b86d15c6ba29 | 1363 | printf("client master secret: "); |
Vanger | 0:b86d15c6ba29 | 1364 | for (i = 0; i < SECRET_LEN; i++) |
Vanger | 0:b86d15c6ba29 | 1365 | printf("%02x", session->sslClient->arrays->masterSecret[i]); |
Vanger | 0:b86d15c6ba29 | 1366 | printf("\n"); |
Vanger | 0:b86d15c6ba29 | 1367 | |
Vanger | 0:b86d15c6ba29 | 1368 | printf("server suite = %d\n", session->sslServer->options.cipherSuite); |
Vanger | 0:b86d15c6ba29 | 1369 | printf("client suite = %d\n", session->sslClient->options.cipherSuite); |
Vanger | 0:b86d15c6ba29 | 1370 | } |
Vanger | 0:b86d15c6ba29 | 1371 | #endif |
Vanger | 0:b86d15c6ba29 | 1372 | |
Vanger | 0:b86d15c6ba29 | 1373 | FreeRsaKey(&key); |
Vanger | 0:b86d15c6ba29 | 1374 | return ret; |
Vanger | 0:b86d15c6ba29 | 1375 | } |
Vanger | 0:b86d15c6ba29 | 1376 | |
Vanger | 0:b86d15c6ba29 | 1377 | |
Vanger | 0:b86d15c6ba29 | 1378 | /* Process Session Ticket */ |
Vanger | 0:b86d15c6ba29 | 1379 | static int ProcessSessionTicket(const byte* input, int* sslBytes, |
Vanger | 0:b86d15c6ba29 | 1380 | SnifferSession* session, char* error) |
Vanger | 0:b86d15c6ba29 | 1381 | { |
Vanger | 0:b86d15c6ba29 | 1382 | word16 len; |
Vanger | 0:b86d15c6ba29 | 1383 | |
Vanger | 0:b86d15c6ba29 | 1384 | /* make sure can read through hint and len */ |
Vanger | 0:b86d15c6ba29 | 1385 | if (TICKET_HINT_LEN + LENGTH_SZ > *sslBytes) { |
Vanger | 0:b86d15c6ba29 | 1386 | SetError(BAD_INPUT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1387 | return -1; |
Vanger | 0:b86d15c6ba29 | 1388 | } |
Vanger | 0:b86d15c6ba29 | 1389 | |
Vanger | 0:b86d15c6ba29 | 1390 | input += TICKET_HINT_LEN; /* skip over hint */ |
Vanger | 0:b86d15c6ba29 | 1391 | *sslBytes -= TICKET_HINT_LEN; |
Vanger | 0:b86d15c6ba29 | 1392 | |
Vanger | 0:b86d15c6ba29 | 1393 | len = (word16)((input[0] << 8) | input[1]); |
Vanger | 0:b86d15c6ba29 | 1394 | input += LENGTH_SZ; |
Vanger | 0:b86d15c6ba29 | 1395 | *sslBytes -= LENGTH_SZ; |
Vanger | 0:b86d15c6ba29 | 1396 | |
Vanger | 0:b86d15c6ba29 | 1397 | /* make sure can read through ticket */ |
Vanger | 0:b86d15c6ba29 | 1398 | if (len > *sslBytes || len < ID_LEN) { |
Vanger | 0:b86d15c6ba29 | 1399 | SetError(BAD_INPUT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1400 | return -1; |
Vanger | 0:b86d15c6ba29 | 1401 | } |
Vanger | 0:b86d15c6ba29 | 1402 | |
Vanger | 0:b86d15c6ba29 | 1403 | /* store session with macID as sessionID */ |
Vanger | 0:b86d15c6ba29 | 1404 | session->sslServer->options.haveSessionId = 1; |
Vanger | 0:b86d15c6ba29 | 1405 | XMEMCPY(session->sslServer->arrays->sessionID, input + len - ID_LEN,ID_LEN); |
Vanger | 0:b86d15c6ba29 | 1406 | |
Vanger | 0:b86d15c6ba29 | 1407 | return 0; |
Vanger | 0:b86d15c6ba29 | 1408 | } |
Vanger | 0:b86d15c6ba29 | 1409 | |
Vanger | 0:b86d15c6ba29 | 1410 | |
Vanger | 0:b86d15c6ba29 | 1411 | /* Process Server Hello */ |
Vanger | 0:b86d15c6ba29 | 1412 | static int ProcessServerHello(const byte* input, int* sslBytes, |
Vanger | 0:b86d15c6ba29 | 1413 | SnifferSession* session, char* error) |
Vanger | 0:b86d15c6ba29 | 1414 | { |
Vanger | 0:b86d15c6ba29 | 1415 | ProtocolVersion pv; |
Vanger | 0:b86d15c6ba29 | 1416 | byte b; |
Vanger | 0:b86d15c6ba29 | 1417 | int toRead = VERSION_SZ + RAN_LEN + ENUM_LEN; |
Vanger | 0:b86d15c6ba29 | 1418 | int doResume = 0; |
Vanger | 0:b86d15c6ba29 | 1419 | |
Vanger | 0:b86d15c6ba29 | 1420 | /* make sure we didn't miss ClientHello */ |
Vanger | 0:b86d15c6ba29 | 1421 | if (session->flags.clientHello == 0) { |
Vanger | 0:b86d15c6ba29 | 1422 | SetError(MISSED_CLIENT_HELLO_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1423 | return -1; |
Vanger | 0:b86d15c6ba29 | 1424 | } |
Vanger | 0:b86d15c6ba29 | 1425 | |
Vanger | 0:b86d15c6ba29 | 1426 | /* make sure can read through session len */ |
Vanger | 0:b86d15c6ba29 | 1427 | if (toRead > *sslBytes) { |
Vanger | 0:b86d15c6ba29 | 1428 | SetError(SERVER_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1429 | return -1; |
Vanger | 0:b86d15c6ba29 | 1430 | } |
Vanger | 0:b86d15c6ba29 | 1431 | |
Vanger | 0:b86d15c6ba29 | 1432 | XMEMCPY(&pv, input, VERSION_SZ); |
Vanger | 0:b86d15c6ba29 | 1433 | input += VERSION_SZ; |
Vanger | 0:b86d15c6ba29 | 1434 | *sslBytes -= VERSION_SZ; |
Vanger | 0:b86d15c6ba29 | 1435 | |
Vanger | 0:b86d15c6ba29 | 1436 | session->sslServer->version = pv; |
Vanger | 0:b86d15c6ba29 | 1437 | session->sslClient->version = pv; |
Vanger | 0:b86d15c6ba29 | 1438 | |
Vanger | 0:b86d15c6ba29 | 1439 | XMEMCPY(session->sslServer->arrays->serverRandom, input, RAN_LEN); |
Vanger | 0:b86d15c6ba29 | 1440 | XMEMCPY(session->sslClient->arrays->serverRandom, input, RAN_LEN); |
Vanger | 0:b86d15c6ba29 | 1441 | input += RAN_LEN; |
Vanger | 0:b86d15c6ba29 | 1442 | *sslBytes -= RAN_LEN; |
Vanger | 0:b86d15c6ba29 | 1443 | |
Vanger | 0:b86d15c6ba29 | 1444 | b = *input++; |
Vanger | 0:b86d15c6ba29 | 1445 | *sslBytes -= 1; |
Vanger | 0:b86d15c6ba29 | 1446 | |
Vanger | 0:b86d15c6ba29 | 1447 | /* make sure can read through compression */ |
Vanger | 0:b86d15c6ba29 | 1448 | if ( (b + SUITE_LEN + ENUM_LEN) > *sslBytes) { |
Vanger | 0:b86d15c6ba29 | 1449 | SetError(SERVER_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1450 | return -1; |
Vanger | 0:b86d15c6ba29 | 1451 | } |
Vanger | 0:b86d15c6ba29 | 1452 | if (b) { |
Vanger | 0:b86d15c6ba29 | 1453 | XMEMCPY(session->sslServer->arrays->sessionID, input, ID_LEN); |
Vanger | 0:b86d15c6ba29 | 1454 | session->sslServer->options.haveSessionId = 1; |
Vanger | 0:b86d15c6ba29 | 1455 | } |
Vanger | 0:b86d15c6ba29 | 1456 | input += b; |
Vanger | 0:b86d15c6ba29 | 1457 | *sslBytes -= b; |
Vanger | 0:b86d15c6ba29 | 1458 | |
Vanger | 0:b86d15c6ba29 | 1459 | /* cipher suite */ |
Vanger | 0:b86d15c6ba29 | 1460 | b = *input++; /* first byte, ECC or not */ |
Vanger | 0:b86d15c6ba29 | 1461 | session->sslServer->options.cipherSuite0 = b; |
Vanger | 0:b86d15c6ba29 | 1462 | session->sslClient->options.cipherSuite0 = b; |
Vanger | 0:b86d15c6ba29 | 1463 | b = *input++; |
Vanger | 0:b86d15c6ba29 | 1464 | session->sslServer->options.cipherSuite = b; |
Vanger | 0:b86d15c6ba29 | 1465 | session->sslClient->options.cipherSuite = b; |
Vanger | 0:b86d15c6ba29 | 1466 | *sslBytes -= SUITE_LEN; |
Vanger | 0:b86d15c6ba29 | 1467 | |
Vanger | 0:b86d15c6ba29 | 1468 | /* compression */ |
Vanger | 0:b86d15c6ba29 | 1469 | b = *input++; |
Vanger | 0:b86d15c6ba29 | 1470 | *sslBytes -= ENUM_LEN; |
Vanger | 0:b86d15c6ba29 | 1471 | |
Vanger | 0:b86d15c6ba29 | 1472 | if (b) { |
Vanger | 0:b86d15c6ba29 | 1473 | SetError(BAD_COMPRESSION_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1474 | return -1; |
Vanger | 0:b86d15c6ba29 | 1475 | } |
Vanger | 0:b86d15c6ba29 | 1476 | |
Vanger | 0:b86d15c6ba29 | 1477 | if (session->sslServer->options.haveSessionId && |
Vanger | 0:b86d15c6ba29 | 1478 | XMEMCMP(session->sslServer->arrays->sessionID, |
Vanger | 0:b86d15c6ba29 | 1479 | session->sslClient->arrays->sessionID, ID_LEN) == 0) |
Vanger | 0:b86d15c6ba29 | 1480 | doResume = 1; |
Vanger | 0:b86d15c6ba29 | 1481 | else if (session->sslClient->options.haveSessionId == 0 && |
Vanger | 0:b86d15c6ba29 | 1482 | session->sslServer->options.haveSessionId == 0 && |
Vanger | 0:b86d15c6ba29 | 1483 | session->ticketID) |
Vanger | 0:b86d15c6ba29 | 1484 | doResume = 1; |
Vanger | 0:b86d15c6ba29 | 1485 | |
Vanger | 0:b86d15c6ba29 | 1486 | if (session->ticketID && doResume) { |
Vanger | 0:b86d15c6ba29 | 1487 | /* use ticketID to retrieve from session, prefer over sessionID */ |
Vanger | 0:b86d15c6ba29 | 1488 | XMEMCPY(session->sslServer->arrays->sessionID,session->ticketID,ID_LEN); |
Vanger | 0:b86d15c6ba29 | 1489 | session->sslServer->options.haveSessionId = 1; /* may not have |
Vanger | 0:b86d15c6ba29 | 1490 | actual sessionID */ |
Vanger | 0:b86d15c6ba29 | 1491 | } |
Vanger | 0:b86d15c6ba29 | 1492 | |
Vanger | 0:b86d15c6ba29 | 1493 | if (doResume ) { |
Vanger | 0:b86d15c6ba29 | 1494 | int ret = 0; |
Vanger | 0:b86d15c6ba29 | 1495 | SSL_SESSION* resume = GetSession(session->sslServer, |
Vanger | 0:b86d15c6ba29 | 1496 | session->sslServer->arrays->masterSecret); |
Vanger | 0:b86d15c6ba29 | 1497 | if (resume == NULL) { |
Vanger | 0:b86d15c6ba29 | 1498 | SetError(BAD_SESSION_RESUME_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1499 | return -1; |
Vanger | 0:b86d15c6ba29 | 1500 | } |
Vanger | 0:b86d15c6ba29 | 1501 | /* make sure client has master secret too */ |
Vanger | 0:b86d15c6ba29 | 1502 | XMEMCPY(session->sslClient->arrays->masterSecret, |
Vanger | 0:b86d15c6ba29 | 1503 | session->sslServer->arrays->masterSecret, SECRET_LEN); |
Vanger | 0:b86d15c6ba29 | 1504 | session->flags.resuming = 1; |
Vanger | 0:b86d15c6ba29 | 1505 | |
Vanger | 0:b86d15c6ba29 | 1506 | Trace(SERVER_DID_RESUMPTION_STR); |
Vanger | 0:b86d15c6ba29 | 1507 | if (SetCipherSpecs(session->sslServer) != 0) { |
Vanger | 0:b86d15c6ba29 | 1508 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1509 | return -1; |
Vanger | 0:b86d15c6ba29 | 1510 | } |
Vanger | 0:b86d15c6ba29 | 1511 | |
Vanger | 0:b86d15c6ba29 | 1512 | if (SetCipherSpecs(session->sslClient) != 0) { |
Vanger | 0:b86d15c6ba29 | 1513 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1514 | return -1; |
Vanger | 0:b86d15c6ba29 | 1515 | } |
Vanger | 0:b86d15c6ba29 | 1516 | |
Vanger | 0:b86d15c6ba29 | 1517 | if (session->sslServer->options.tls) { |
Vanger | 0:b86d15c6ba29 | 1518 | ret = DeriveTlsKeys(session->sslServer); |
Vanger | 0:b86d15c6ba29 | 1519 | ret += DeriveTlsKeys(session->sslClient); |
Vanger | 0:b86d15c6ba29 | 1520 | } |
Vanger | 0:b86d15c6ba29 | 1521 | else { |
Vanger | 0:b86d15c6ba29 | 1522 | ret = DeriveKeys(session->sslServer); |
Vanger | 0:b86d15c6ba29 | 1523 | ret += DeriveKeys(session->sslClient); |
Vanger | 0:b86d15c6ba29 | 1524 | } |
Vanger | 0:b86d15c6ba29 | 1525 | ret += SetKeysSide(session->sslServer, ENCRYPT_AND_DECRYPT_SIDE); |
Vanger | 0:b86d15c6ba29 | 1526 | ret += SetKeysSide(session->sslClient, ENCRYPT_AND_DECRYPT_SIDE); |
Vanger | 0:b86d15c6ba29 | 1527 | |
Vanger | 0:b86d15c6ba29 | 1528 | if (ret != 0) { |
Vanger | 0:b86d15c6ba29 | 1529 | SetError(BAD_DERIVE_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1530 | return -1; |
Vanger | 0:b86d15c6ba29 | 1531 | } |
Vanger | 0:b86d15c6ba29 | 1532 | } |
Vanger | 0:b86d15c6ba29 | 1533 | #ifdef SHOW_SECRETS |
Vanger | 0:b86d15c6ba29 | 1534 | { |
Vanger | 0:b86d15c6ba29 | 1535 | int i; |
Vanger | 0:b86d15c6ba29 | 1536 | printf("cipher suite = 0x%02x\n", |
Vanger | 0:b86d15c6ba29 | 1537 | session->sslServer->options.cipherSuite); |
Vanger | 0:b86d15c6ba29 | 1538 | printf("server random: "); |
Vanger | 0:b86d15c6ba29 | 1539 | for (i = 0; i < RAN_LEN; i++) |
Vanger | 0:b86d15c6ba29 | 1540 | printf("%02x", session->sslServer->arrays->serverRandom[i]); |
Vanger | 0:b86d15c6ba29 | 1541 | printf("\n"); |
Vanger | 0:b86d15c6ba29 | 1542 | } |
Vanger | 0:b86d15c6ba29 | 1543 | #endif |
Vanger | 0:b86d15c6ba29 | 1544 | return 0; |
Vanger | 0:b86d15c6ba29 | 1545 | } |
Vanger | 0:b86d15c6ba29 | 1546 | |
Vanger | 0:b86d15c6ba29 | 1547 | |
Vanger | 0:b86d15c6ba29 | 1548 | /* Process normal Client Hello */ |
Vanger | 0:b86d15c6ba29 | 1549 | static int ProcessClientHello(const byte* input, int* sslBytes, |
Vanger | 0:b86d15c6ba29 | 1550 | SnifferSession* session, char* error) |
Vanger | 0:b86d15c6ba29 | 1551 | { |
Vanger | 0:b86d15c6ba29 | 1552 | byte bLen; |
Vanger | 0:b86d15c6ba29 | 1553 | word16 len; |
Vanger | 0:b86d15c6ba29 | 1554 | int toRead = VERSION_SZ + RAN_LEN + ENUM_LEN; |
Vanger | 0:b86d15c6ba29 | 1555 | |
Vanger | 0:b86d15c6ba29 | 1556 | #ifdef HAVE_SNI |
Vanger | 0:b86d15c6ba29 | 1557 | { |
Vanger | 0:b86d15c6ba29 | 1558 | byte name[MAX_SERVER_NAME]; |
Vanger | 0:b86d15c6ba29 | 1559 | word32 nameSz = sizeof(name); |
Vanger | 0:b86d15c6ba29 | 1560 | int ret; |
Vanger | 0:b86d15c6ba29 | 1561 | |
Vanger | 0:b86d15c6ba29 | 1562 | ret = CyaSSL_SNI_GetFromBuffer( |
Vanger | 0:b86d15c6ba29 | 1563 | input - HANDSHAKE_HEADER_SZ - RECORD_HEADER_SZ, |
Vanger | 0:b86d15c6ba29 | 1564 | *sslBytes + HANDSHAKE_HEADER_SZ + RECORD_HEADER_SZ, |
Vanger | 0:b86d15c6ba29 | 1565 | CYASSL_SNI_HOST_NAME, name, &nameSz); |
Vanger | 0:b86d15c6ba29 | 1566 | |
Vanger | 0:b86d15c6ba29 | 1567 | if (ret == SSL_SUCCESS) { |
Vanger | 0:b86d15c6ba29 | 1568 | NamedKey* namedKey; |
Vanger | 0:b86d15c6ba29 | 1569 | |
Vanger | 0:b86d15c6ba29 | 1570 | name[nameSz] = 0; |
Vanger | 0:b86d15c6ba29 | 1571 | LockMutex(&session->context->namedKeysMutex); |
Vanger | 0:b86d15c6ba29 | 1572 | namedKey = session->context->namedKeys; |
Vanger | 0:b86d15c6ba29 | 1573 | while (namedKey != NULL) { |
Vanger | 0:b86d15c6ba29 | 1574 | if (nameSz == namedKey->nameSz && |
Vanger | 0:b86d15c6ba29 | 1575 | XSTRNCMP((char*)name, namedKey->name, nameSz) == 0) { |
Vanger | 0:b86d15c6ba29 | 1576 | if (CyaSSL_use_PrivateKey_buffer(session->sslServer, |
Vanger | 0:b86d15c6ba29 | 1577 | namedKey->key, namedKey->keySz, |
Vanger | 0:b86d15c6ba29 | 1578 | SSL_FILETYPE_ASN1) != SSL_SUCCESS) { |
Vanger | 0:b86d15c6ba29 | 1579 | UnLockMutex(&session->context->namedKeysMutex); |
Vanger | 0:b86d15c6ba29 | 1580 | SetError(CLIENT_HELLO_LATE_KEY_STR, error, session, |
Vanger | 0:b86d15c6ba29 | 1581 | FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1582 | return -1; |
Vanger | 0:b86d15c6ba29 | 1583 | } |
Vanger | 0:b86d15c6ba29 | 1584 | break; |
Vanger | 0:b86d15c6ba29 | 1585 | } |
Vanger | 0:b86d15c6ba29 | 1586 | else |
Vanger | 0:b86d15c6ba29 | 1587 | namedKey = namedKey->next; |
Vanger | 0:b86d15c6ba29 | 1588 | } |
Vanger | 0:b86d15c6ba29 | 1589 | UnLockMutex(&session->context->namedKeysMutex); |
Vanger | 0:b86d15c6ba29 | 1590 | } |
Vanger | 0:b86d15c6ba29 | 1591 | } |
Vanger | 0:b86d15c6ba29 | 1592 | #endif |
Vanger | 0:b86d15c6ba29 | 1593 | |
Vanger | 0:b86d15c6ba29 | 1594 | session->flags.clientHello = 1; /* don't process again */ |
Vanger | 0:b86d15c6ba29 | 1595 | |
Vanger | 0:b86d15c6ba29 | 1596 | /* make sure can read up to session len */ |
Vanger | 0:b86d15c6ba29 | 1597 | if (toRead > *sslBytes) { |
Vanger | 0:b86d15c6ba29 | 1598 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1599 | return -1; |
Vanger | 0:b86d15c6ba29 | 1600 | } |
Vanger | 0:b86d15c6ba29 | 1601 | |
Vanger | 0:b86d15c6ba29 | 1602 | /* skip, get negotiated one from server hello */ |
Vanger | 0:b86d15c6ba29 | 1603 | input += VERSION_SZ; |
Vanger | 0:b86d15c6ba29 | 1604 | *sslBytes -= VERSION_SZ; |
Vanger | 0:b86d15c6ba29 | 1605 | |
Vanger | 0:b86d15c6ba29 | 1606 | XMEMCPY(session->sslServer->arrays->clientRandom, input, RAN_LEN); |
Vanger | 0:b86d15c6ba29 | 1607 | XMEMCPY(session->sslClient->arrays->clientRandom, input, RAN_LEN); |
Vanger | 0:b86d15c6ba29 | 1608 | |
Vanger | 0:b86d15c6ba29 | 1609 | input += RAN_LEN; |
Vanger | 0:b86d15c6ba29 | 1610 | *sslBytes -= RAN_LEN; |
Vanger | 0:b86d15c6ba29 | 1611 | |
Vanger | 0:b86d15c6ba29 | 1612 | /* store session in case trying to resume */ |
Vanger | 0:b86d15c6ba29 | 1613 | bLen = *input++; |
Vanger | 0:b86d15c6ba29 | 1614 | *sslBytes -= ENUM_LEN; |
Vanger | 0:b86d15c6ba29 | 1615 | if (bLen) { |
Vanger | 0:b86d15c6ba29 | 1616 | if (ID_LEN > *sslBytes) { |
Vanger | 0:b86d15c6ba29 | 1617 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1618 | return -1; |
Vanger | 0:b86d15c6ba29 | 1619 | } |
Vanger | 0:b86d15c6ba29 | 1620 | Trace(CLIENT_RESUME_TRY_STR); |
Vanger | 0:b86d15c6ba29 | 1621 | XMEMCPY(session->sslClient->arrays->sessionID, input, ID_LEN); |
Vanger | 0:b86d15c6ba29 | 1622 | session->sslClient->options.haveSessionId = 1; |
Vanger | 0:b86d15c6ba29 | 1623 | } |
Vanger | 0:b86d15c6ba29 | 1624 | #ifdef SHOW_SECRETS |
Vanger | 0:b86d15c6ba29 | 1625 | { |
Vanger | 0:b86d15c6ba29 | 1626 | int i; |
Vanger | 0:b86d15c6ba29 | 1627 | printf("client random: "); |
Vanger | 0:b86d15c6ba29 | 1628 | for (i = 0; i < RAN_LEN; i++) |
Vanger | 0:b86d15c6ba29 | 1629 | printf("%02x", session->sslServer->arrays->clientRandom[i]); |
Vanger | 0:b86d15c6ba29 | 1630 | printf("\n"); |
Vanger | 0:b86d15c6ba29 | 1631 | } |
Vanger | 0:b86d15c6ba29 | 1632 | #endif |
Vanger | 0:b86d15c6ba29 | 1633 | |
Vanger | 0:b86d15c6ba29 | 1634 | input += bLen; |
Vanger | 0:b86d15c6ba29 | 1635 | *sslBytes -= bLen; |
Vanger | 0:b86d15c6ba29 | 1636 | |
Vanger | 0:b86d15c6ba29 | 1637 | /* skip cipher suites */ |
Vanger | 0:b86d15c6ba29 | 1638 | /* make sure can read len */ |
Vanger | 0:b86d15c6ba29 | 1639 | if (SUITE_LEN > *sslBytes) { |
Vanger | 0:b86d15c6ba29 | 1640 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1641 | return -1; |
Vanger | 0:b86d15c6ba29 | 1642 | } |
Vanger | 0:b86d15c6ba29 | 1643 | len = (word16)((input[0] << 8) | input[1]); |
Vanger | 0:b86d15c6ba29 | 1644 | input += SUITE_LEN; |
Vanger | 0:b86d15c6ba29 | 1645 | *sslBytes -= SUITE_LEN; |
Vanger | 0:b86d15c6ba29 | 1646 | /* make sure can read suites + comp len */ |
Vanger | 0:b86d15c6ba29 | 1647 | if (len + ENUM_LEN > *sslBytes) { |
Vanger | 0:b86d15c6ba29 | 1648 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1649 | return -1; |
Vanger | 0:b86d15c6ba29 | 1650 | } |
Vanger | 0:b86d15c6ba29 | 1651 | input += len; |
Vanger | 0:b86d15c6ba29 | 1652 | *sslBytes -= len; |
Vanger | 0:b86d15c6ba29 | 1653 | |
Vanger | 0:b86d15c6ba29 | 1654 | /* skip compression */ |
Vanger | 0:b86d15c6ba29 | 1655 | bLen = *input++; |
Vanger | 0:b86d15c6ba29 | 1656 | *sslBytes -= ENUM_LEN; |
Vanger | 0:b86d15c6ba29 | 1657 | /* make sure can read len */ |
Vanger | 0:b86d15c6ba29 | 1658 | if (bLen > *sslBytes) { |
Vanger | 0:b86d15c6ba29 | 1659 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1660 | return -1; |
Vanger | 0:b86d15c6ba29 | 1661 | } |
Vanger | 0:b86d15c6ba29 | 1662 | input += bLen; |
Vanger | 0:b86d15c6ba29 | 1663 | *sslBytes -= bLen; |
Vanger | 0:b86d15c6ba29 | 1664 | |
Vanger | 0:b86d15c6ba29 | 1665 | if (*sslBytes == 0) { |
Vanger | 0:b86d15c6ba29 | 1666 | /* no extensions */ |
Vanger | 0:b86d15c6ba29 | 1667 | return 0; |
Vanger | 0:b86d15c6ba29 | 1668 | } |
Vanger | 0:b86d15c6ba29 | 1669 | |
Vanger | 0:b86d15c6ba29 | 1670 | /* skip extensions until session ticket */ |
Vanger | 0:b86d15c6ba29 | 1671 | /* make sure can read len */ |
Vanger | 0:b86d15c6ba29 | 1672 | if (SUITE_LEN > *sslBytes) { |
Vanger | 0:b86d15c6ba29 | 1673 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1674 | return -1; |
Vanger | 0:b86d15c6ba29 | 1675 | } |
Vanger | 0:b86d15c6ba29 | 1676 | len = (word16)((input[0] << 8) | input[1]); |
Vanger | 0:b86d15c6ba29 | 1677 | input += SUITE_LEN; |
Vanger | 0:b86d15c6ba29 | 1678 | *sslBytes -= SUITE_LEN; |
Vanger | 0:b86d15c6ba29 | 1679 | /* make sure can read through all extensions */ |
Vanger | 0:b86d15c6ba29 | 1680 | if (len > *sslBytes) { |
Vanger | 0:b86d15c6ba29 | 1681 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1682 | return -1; |
Vanger | 0:b86d15c6ba29 | 1683 | } |
Vanger | 0:b86d15c6ba29 | 1684 | |
Vanger | 0:b86d15c6ba29 | 1685 | while (len > EXT_TYPE_SZ + LENGTH_SZ) { |
Vanger | 0:b86d15c6ba29 | 1686 | byte extType[EXT_TYPE_SZ]; |
Vanger | 0:b86d15c6ba29 | 1687 | word16 extLen; |
Vanger | 0:b86d15c6ba29 | 1688 | |
Vanger | 0:b86d15c6ba29 | 1689 | extType[0] = input[0]; |
Vanger | 0:b86d15c6ba29 | 1690 | extType[1] = input[1]; |
Vanger | 0:b86d15c6ba29 | 1691 | input += EXT_TYPE_SZ; |
Vanger | 0:b86d15c6ba29 | 1692 | *sslBytes -= EXT_TYPE_SZ; |
Vanger | 0:b86d15c6ba29 | 1693 | |
Vanger | 0:b86d15c6ba29 | 1694 | extLen = (word16)((input[0] << 8) | input[1]); |
Vanger | 0:b86d15c6ba29 | 1695 | input += LENGTH_SZ; |
Vanger | 0:b86d15c6ba29 | 1696 | *sslBytes -= LENGTH_SZ; |
Vanger | 0:b86d15c6ba29 | 1697 | |
Vanger | 0:b86d15c6ba29 | 1698 | /* make sure can read through individual extension */ |
Vanger | 0:b86d15c6ba29 | 1699 | if (extLen > *sslBytes) { |
Vanger | 0:b86d15c6ba29 | 1700 | SetError(CLIENT_HELLO_INPUT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1701 | return -1; |
Vanger | 0:b86d15c6ba29 | 1702 | } |
Vanger | 0:b86d15c6ba29 | 1703 | |
Vanger | 0:b86d15c6ba29 | 1704 | if (extType[0] == 0x00 && extType[1] == TICKET_EXT_ID) { |
Vanger | 0:b86d15c6ba29 | 1705 | |
Vanger | 0:b86d15c6ba29 | 1706 | /* make sure can read through ticket if there is a non blank one */ |
Vanger | 0:b86d15c6ba29 | 1707 | if (extLen && extLen < ID_LEN) { |
Vanger | 0:b86d15c6ba29 | 1708 | SetError(CLIENT_HELLO_INPUT_STR, error, session, |
Vanger | 0:b86d15c6ba29 | 1709 | FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1710 | return -1; |
Vanger | 0:b86d15c6ba29 | 1711 | } |
Vanger | 0:b86d15c6ba29 | 1712 | |
Vanger | 0:b86d15c6ba29 | 1713 | if (extLen) { |
Vanger | 0:b86d15c6ba29 | 1714 | if (session->ticketID == 0) { |
Vanger | 0:b86d15c6ba29 | 1715 | session->ticketID = (byte*)malloc(ID_LEN); |
Vanger | 0:b86d15c6ba29 | 1716 | if (session->ticketID == 0) { |
Vanger | 0:b86d15c6ba29 | 1717 | SetError(MEMORY_STR, error, session, |
Vanger | 0:b86d15c6ba29 | 1718 | FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1719 | return -1; |
Vanger | 0:b86d15c6ba29 | 1720 | } |
Vanger | 0:b86d15c6ba29 | 1721 | } |
Vanger | 0:b86d15c6ba29 | 1722 | XMEMCPY(session->ticketID, input + extLen - ID_LEN, ID_LEN); |
Vanger | 0:b86d15c6ba29 | 1723 | } |
Vanger | 0:b86d15c6ba29 | 1724 | } |
Vanger | 0:b86d15c6ba29 | 1725 | |
Vanger | 0:b86d15c6ba29 | 1726 | input += extLen; |
Vanger | 0:b86d15c6ba29 | 1727 | *sslBytes -= extLen; |
Vanger | 0:b86d15c6ba29 | 1728 | len -= extLen + EXT_TYPE_SZ + LENGTH_SZ; |
Vanger | 0:b86d15c6ba29 | 1729 | } |
Vanger | 0:b86d15c6ba29 | 1730 | |
Vanger | 0:b86d15c6ba29 | 1731 | return 0; |
Vanger | 0:b86d15c6ba29 | 1732 | } |
Vanger | 0:b86d15c6ba29 | 1733 | |
Vanger | 0:b86d15c6ba29 | 1734 | |
Vanger | 0:b86d15c6ba29 | 1735 | /* Process Finished */ |
Vanger | 0:b86d15c6ba29 | 1736 | static int ProcessFinished(const byte* input, int size, int* sslBytes, |
Vanger | 0:b86d15c6ba29 | 1737 | SnifferSession* session, char* error) |
Vanger | 0:b86d15c6ba29 | 1738 | { |
Vanger | 0:b86d15c6ba29 | 1739 | SSL* ssl; |
Vanger | 0:b86d15c6ba29 | 1740 | word32 inOutIdx = 0; |
Vanger | 0:b86d15c6ba29 | 1741 | int ret; |
Vanger | 0:b86d15c6ba29 | 1742 | |
Vanger | 0:b86d15c6ba29 | 1743 | if (session->flags.side == CYASSL_SERVER_END) |
Vanger | 0:b86d15c6ba29 | 1744 | ssl = session->sslServer; |
Vanger | 0:b86d15c6ba29 | 1745 | else |
Vanger | 0:b86d15c6ba29 | 1746 | ssl = session->sslClient; |
Vanger | 0:b86d15c6ba29 | 1747 | |
Vanger | 0:b86d15c6ba29 | 1748 | ret = DoFinished(ssl, input, &inOutIdx, (word32) size, (word32) *sslBytes, |
Vanger | 0:b86d15c6ba29 | 1749 | SNIFF); |
Vanger | 0:b86d15c6ba29 | 1750 | *sslBytes -= (int)inOutIdx; |
Vanger | 0:b86d15c6ba29 | 1751 | |
Vanger | 0:b86d15c6ba29 | 1752 | if (ret < 0) { |
Vanger | 0:b86d15c6ba29 | 1753 | SetError(BAD_FINISHED_MSG, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1754 | return ret; |
Vanger | 0:b86d15c6ba29 | 1755 | } |
Vanger | 0:b86d15c6ba29 | 1756 | |
Vanger | 0:b86d15c6ba29 | 1757 | if (ret == 0 && session->flags.cached == 0) { |
Vanger | 0:b86d15c6ba29 | 1758 | if (session->sslServer->options.haveSessionId) { |
Vanger | 0:b86d15c6ba29 | 1759 | CYASSL_SESSION* sess = GetSession(session->sslServer, NULL); |
Vanger | 0:b86d15c6ba29 | 1760 | if (sess == NULL) |
Vanger | 0:b86d15c6ba29 | 1761 | AddSession(session->sslServer); /* don't re add */ |
Vanger | 0:b86d15c6ba29 | 1762 | session->flags.cached = 1; |
Vanger | 0:b86d15c6ba29 | 1763 | } |
Vanger | 0:b86d15c6ba29 | 1764 | } |
Vanger | 0:b86d15c6ba29 | 1765 | |
Vanger | 0:b86d15c6ba29 | 1766 | FreeHandshakeResources(ssl); |
Vanger | 0:b86d15c6ba29 | 1767 | |
Vanger | 0:b86d15c6ba29 | 1768 | return ret; |
Vanger | 0:b86d15c6ba29 | 1769 | } |
Vanger | 0:b86d15c6ba29 | 1770 | |
Vanger | 0:b86d15c6ba29 | 1771 | |
Vanger | 0:b86d15c6ba29 | 1772 | /* Process HandShake input */ |
Vanger | 0:b86d15c6ba29 | 1773 | static int DoHandShake(const byte* input, int* sslBytes, |
Vanger | 0:b86d15c6ba29 | 1774 | SnifferSession* session, char* error) |
Vanger | 0:b86d15c6ba29 | 1775 | { |
Vanger | 0:b86d15c6ba29 | 1776 | byte type; |
Vanger | 0:b86d15c6ba29 | 1777 | int size; |
Vanger | 0:b86d15c6ba29 | 1778 | int ret = 0; |
Vanger | 0:b86d15c6ba29 | 1779 | int startBytes; |
Vanger | 0:b86d15c6ba29 | 1780 | |
Vanger | 0:b86d15c6ba29 | 1781 | if (*sslBytes < HANDSHAKE_HEADER_SZ) { |
Vanger | 0:b86d15c6ba29 | 1782 | SetError(HANDSHAKE_INPUT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1783 | return -1; |
Vanger | 0:b86d15c6ba29 | 1784 | } |
Vanger | 0:b86d15c6ba29 | 1785 | type = input[0]; |
Vanger | 0:b86d15c6ba29 | 1786 | size = (input[1] << 16) | (input[2] << 8) | input[3]; |
Vanger | 0:b86d15c6ba29 | 1787 | |
Vanger | 0:b86d15c6ba29 | 1788 | input += HANDSHAKE_HEADER_SZ; |
Vanger | 0:b86d15c6ba29 | 1789 | *sslBytes -= HANDSHAKE_HEADER_SZ; |
Vanger | 0:b86d15c6ba29 | 1790 | startBytes = *sslBytes; |
Vanger | 0:b86d15c6ba29 | 1791 | |
Vanger | 0:b86d15c6ba29 | 1792 | if (*sslBytes < size) { |
Vanger | 0:b86d15c6ba29 | 1793 | SetError(HANDSHAKE_INPUT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1794 | return -1; |
Vanger | 0:b86d15c6ba29 | 1795 | } |
Vanger | 0:b86d15c6ba29 | 1796 | |
Vanger | 0:b86d15c6ba29 | 1797 | switch (type) { |
Vanger | 0:b86d15c6ba29 | 1798 | case hello_verify_request: |
Vanger | 0:b86d15c6ba29 | 1799 | Trace(GOT_HELLO_VERIFY_STR); |
Vanger | 0:b86d15c6ba29 | 1800 | break; |
Vanger | 0:b86d15c6ba29 | 1801 | case hello_request: |
Vanger | 0:b86d15c6ba29 | 1802 | Trace(GOT_HELLO_REQUEST_STR); |
Vanger | 0:b86d15c6ba29 | 1803 | break; |
Vanger | 0:b86d15c6ba29 | 1804 | case session_ticket: |
Vanger | 0:b86d15c6ba29 | 1805 | Trace(GOT_SESSION_TICKET_STR); |
Vanger | 0:b86d15c6ba29 | 1806 | ret = ProcessSessionTicket(input, sslBytes, session, error); |
Vanger | 0:b86d15c6ba29 | 1807 | break; |
Vanger | 0:b86d15c6ba29 | 1808 | case server_hello: |
Vanger | 0:b86d15c6ba29 | 1809 | Trace(GOT_SERVER_HELLO_STR); |
Vanger | 0:b86d15c6ba29 | 1810 | ret = ProcessServerHello(input, sslBytes, session, error); |
Vanger | 0:b86d15c6ba29 | 1811 | break; |
Vanger | 0:b86d15c6ba29 | 1812 | case certificate_request: |
Vanger | 0:b86d15c6ba29 | 1813 | Trace(GOT_CERT_REQ_STR); |
Vanger | 0:b86d15c6ba29 | 1814 | break; |
Vanger | 0:b86d15c6ba29 | 1815 | case server_key_exchange: |
Vanger | 0:b86d15c6ba29 | 1816 | Trace(GOT_SERVER_KEY_EX_STR); |
Vanger | 0:b86d15c6ba29 | 1817 | /* can't know temp key passively */ |
Vanger | 0:b86d15c6ba29 | 1818 | SetError(BAD_CIPHER_SPEC_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 1819 | ret = -1; |
Vanger | 0:b86d15c6ba29 | 1820 | break; |
Vanger | 0:b86d15c6ba29 | 1821 | case certificate: |
Vanger | 0:b86d15c6ba29 | 1822 | Trace(GOT_CERT_STR); |
Vanger | 0:b86d15c6ba29 | 1823 | break; |
Vanger | 0:b86d15c6ba29 | 1824 | case server_hello_done: |
Vanger | 0:b86d15c6ba29 | 1825 | Trace(GOT_SERVER_HELLO_DONE_STR); |
Vanger | 0:b86d15c6ba29 | 1826 | break; |
Vanger | 0:b86d15c6ba29 | 1827 | case finished: |
Vanger | 0:b86d15c6ba29 | 1828 | Trace(GOT_FINISHED_STR); |
Vanger | 0:b86d15c6ba29 | 1829 | ret = ProcessFinished(input, size, sslBytes, session, error); |
Vanger | 0:b86d15c6ba29 | 1830 | break; |
Vanger | 0:b86d15c6ba29 | 1831 | case client_hello: |
Vanger | 0:b86d15c6ba29 | 1832 | Trace(GOT_CLIENT_HELLO_STR); |
Vanger | 0:b86d15c6ba29 | 1833 | ret = ProcessClientHello(input, sslBytes, session, error); |
Vanger | 0:b86d15c6ba29 | 1834 | break; |
Vanger | 0:b86d15c6ba29 | 1835 | case client_key_exchange: |
Vanger | 0:b86d15c6ba29 | 1836 | Trace(GOT_CLIENT_KEY_EX_STR); |
Vanger | 0:b86d15c6ba29 | 1837 | ret = ProcessClientKeyExchange(input, sslBytes, session, error); |
Vanger | 0:b86d15c6ba29 | 1838 | break; |
Vanger | 0:b86d15c6ba29 | 1839 | case certificate_verify: |
Vanger | 0:b86d15c6ba29 | 1840 | Trace(GOT_CERT_VER_STR); |
Vanger | 0:b86d15c6ba29 | 1841 | break; |
Vanger | 0:b86d15c6ba29 | 1842 | default: |
Vanger | 0:b86d15c6ba29 | 1843 | SetError(GOT_UNKNOWN_HANDSHAKE_STR, error, session, 0); |
Vanger | 0:b86d15c6ba29 | 1844 | return -1; |
Vanger | 0:b86d15c6ba29 | 1845 | } |
Vanger | 0:b86d15c6ba29 | 1846 | |
Vanger | 0:b86d15c6ba29 | 1847 | *sslBytes = startBytes - size; /* actual bytes of full process */ |
Vanger | 0:b86d15c6ba29 | 1848 | |
Vanger | 0:b86d15c6ba29 | 1849 | return ret; |
Vanger | 0:b86d15c6ba29 | 1850 | } |
Vanger | 0:b86d15c6ba29 | 1851 | |
Vanger | 0:b86d15c6ba29 | 1852 | |
Vanger | 0:b86d15c6ba29 | 1853 | /* Decrypt input into plain output, 0 on success */ |
Vanger | 0:b86d15c6ba29 | 1854 | static int Decrypt(SSL* ssl, byte* output, const byte* input, word32 sz) |
Vanger | 0:b86d15c6ba29 | 1855 | { |
Vanger | 0:b86d15c6ba29 | 1856 | int ret = 0; |
Vanger | 0:b86d15c6ba29 | 1857 | |
Vanger | 0:b86d15c6ba29 | 1858 | switch (ssl->specs.bulk_cipher_algorithm) { |
Vanger | 0:b86d15c6ba29 | 1859 | #ifdef BUILD_ARC4 |
Vanger | 0:b86d15c6ba29 | 1860 | case cyassl_rc4: |
Vanger | 0:b86d15c6ba29 | 1861 | Arc4Process(ssl->decrypt.arc4, output, input, sz); |
Vanger | 0:b86d15c6ba29 | 1862 | break; |
Vanger | 0:b86d15c6ba29 | 1863 | #endif |
Vanger | 0:b86d15c6ba29 | 1864 | |
Vanger | 0:b86d15c6ba29 | 1865 | #ifdef BUILD_DES3 |
Vanger | 0:b86d15c6ba29 | 1866 | case cyassl_triple_des: |
Vanger | 0:b86d15c6ba29 | 1867 | ret = Des3_CbcDecrypt(ssl->decrypt.des3, output, input, sz); |
Vanger | 0:b86d15c6ba29 | 1868 | break; |
Vanger | 0:b86d15c6ba29 | 1869 | #endif |
Vanger | 0:b86d15c6ba29 | 1870 | |
Vanger | 0:b86d15c6ba29 | 1871 | #ifdef BUILD_AES |
Vanger | 0:b86d15c6ba29 | 1872 | case cyassl_aes: |
Vanger | 0:b86d15c6ba29 | 1873 | ret = AesCbcDecrypt(ssl->decrypt.aes, output, input, sz); |
Vanger | 0:b86d15c6ba29 | 1874 | break; |
Vanger | 0:b86d15c6ba29 | 1875 | #endif |
Vanger | 0:b86d15c6ba29 | 1876 | |
Vanger | 0:b86d15c6ba29 | 1877 | #ifdef HAVE_HC128 |
Vanger | 0:b86d15c6ba29 | 1878 | case cyassl_hc128: |
Vanger | 0:b86d15c6ba29 | 1879 | Hc128_Process(ssl->decrypt.hc128, output, input, sz); |
Vanger | 0:b86d15c6ba29 | 1880 | break; |
Vanger | 0:b86d15c6ba29 | 1881 | #endif |
Vanger | 0:b86d15c6ba29 | 1882 | |
Vanger | 0:b86d15c6ba29 | 1883 | #ifdef BUILD_RABBIT |
Vanger | 0:b86d15c6ba29 | 1884 | case cyassl_rabbit: |
Vanger | 0:b86d15c6ba29 | 1885 | RabbitProcess(ssl->decrypt.rabbit, output, input, sz); |
Vanger | 0:b86d15c6ba29 | 1886 | break; |
Vanger | 0:b86d15c6ba29 | 1887 | #endif |
Vanger | 0:b86d15c6ba29 | 1888 | |
Vanger | 0:b86d15c6ba29 | 1889 | #ifdef HAVE_CAMELLIA |
Vanger | 0:b86d15c6ba29 | 1890 | case cyassl_camellia: |
Vanger | 0:b86d15c6ba29 | 1891 | CamelliaCbcDecrypt(ssl->decrypt.cam, output, input, sz); |
Vanger | 0:b86d15c6ba29 | 1892 | break; |
Vanger | 0:b86d15c6ba29 | 1893 | #endif |
Vanger | 0:b86d15c6ba29 | 1894 | |
Vanger | 0:b86d15c6ba29 | 1895 | default: |
Vanger | 0:b86d15c6ba29 | 1896 | Trace(BAD_DECRYPT_TYPE); |
Vanger | 0:b86d15c6ba29 | 1897 | ret = -1; |
Vanger | 0:b86d15c6ba29 | 1898 | break; |
Vanger | 0:b86d15c6ba29 | 1899 | } |
Vanger | 0:b86d15c6ba29 | 1900 | |
Vanger | 0:b86d15c6ba29 | 1901 | return ret; |
Vanger | 0:b86d15c6ba29 | 1902 | } |
Vanger | 0:b86d15c6ba29 | 1903 | |
Vanger | 0:b86d15c6ba29 | 1904 | |
Vanger | 0:b86d15c6ba29 | 1905 | /* Decrypt input message into output, adjust output steam if needed */ |
Vanger | 0:b86d15c6ba29 | 1906 | static const byte* DecryptMessage(SSL* ssl, const byte* input, word32 sz, |
Vanger | 0:b86d15c6ba29 | 1907 | byte* output, int* error, int* advance) |
Vanger | 0:b86d15c6ba29 | 1908 | { |
Vanger | 0:b86d15c6ba29 | 1909 | int ivExtra = 0; |
Vanger | 0:b86d15c6ba29 | 1910 | |
Vanger | 0:b86d15c6ba29 | 1911 | int ret = Decrypt(ssl, output, input, sz); |
Vanger | 0:b86d15c6ba29 | 1912 | if (ret != 0) { |
Vanger | 0:b86d15c6ba29 | 1913 | *error = ret; |
Vanger | 0:b86d15c6ba29 | 1914 | return NULL; |
Vanger | 0:b86d15c6ba29 | 1915 | } |
Vanger | 0:b86d15c6ba29 | 1916 | ssl->keys.encryptSz = sz; |
Vanger | 0:b86d15c6ba29 | 1917 | if (ssl->options.tls1_1 && ssl->specs.cipher_type == block) { |
Vanger | 0:b86d15c6ba29 | 1918 | output += ssl->specs.block_size; /* go past TLSv1.1 IV */ |
Vanger | 0:b86d15c6ba29 | 1919 | ivExtra = ssl->specs.block_size; |
Vanger | 0:b86d15c6ba29 | 1920 | *advance = ssl->specs.block_size; |
Vanger | 0:b86d15c6ba29 | 1921 | } |
Vanger | 0:b86d15c6ba29 | 1922 | |
Vanger | 0:b86d15c6ba29 | 1923 | ssl->keys.padSz = ssl->specs.hash_size; |
Vanger | 0:b86d15c6ba29 | 1924 | |
Vanger | 0:b86d15c6ba29 | 1925 | if (ssl->specs.cipher_type == block) |
Vanger | 0:b86d15c6ba29 | 1926 | ssl->keys.padSz += *(output + sz - ivExtra - 1) + 1; |
Vanger | 0:b86d15c6ba29 | 1927 | |
Vanger | 0:b86d15c6ba29 | 1928 | return output; |
Vanger | 0:b86d15c6ba29 | 1929 | } |
Vanger | 0:b86d15c6ba29 | 1930 | |
Vanger | 0:b86d15c6ba29 | 1931 | |
Vanger | 0:b86d15c6ba29 | 1932 | /* remove session from table, use rowHint if no info (means we have a lock) */ |
Vanger | 0:b86d15c6ba29 | 1933 | static void RemoveSession(SnifferSession* session, IpInfo* ipInfo, |
Vanger | 0:b86d15c6ba29 | 1934 | TcpInfo* tcpInfo, word32 rowHint) |
Vanger | 0:b86d15c6ba29 | 1935 | { |
Vanger | 0:b86d15c6ba29 | 1936 | SnifferSession* previous = 0; |
Vanger | 0:b86d15c6ba29 | 1937 | SnifferSession* current; |
Vanger | 0:b86d15c6ba29 | 1938 | word32 row = rowHint; |
Vanger | 0:b86d15c6ba29 | 1939 | int haveLock = 0; |
Vanger | 0:b86d15c6ba29 | 1940 | |
Vanger | 0:b86d15c6ba29 | 1941 | if (ipInfo && tcpInfo) |
Vanger | 0:b86d15c6ba29 | 1942 | row = SessionHash(ipInfo, tcpInfo); |
Vanger | 0:b86d15c6ba29 | 1943 | else |
Vanger | 0:b86d15c6ba29 | 1944 | haveLock = 1; |
Vanger | 0:b86d15c6ba29 | 1945 | |
Vanger | 0:b86d15c6ba29 | 1946 | assert(row <= HASH_SIZE); |
Vanger | 0:b86d15c6ba29 | 1947 | Trace(REMOVE_SESSION_STR); |
Vanger | 0:b86d15c6ba29 | 1948 | |
Vanger | 0:b86d15c6ba29 | 1949 | if (!haveLock) |
Vanger | 0:b86d15c6ba29 | 1950 | LockMutex(&SessionMutex); |
Vanger | 0:b86d15c6ba29 | 1951 | |
Vanger | 0:b86d15c6ba29 | 1952 | current = SessionTable[row]; |
Vanger | 0:b86d15c6ba29 | 1953 | |
Vanger | 0:b86d15c6ba29 | 1954 | while (current) { |
Vanger | 0:b86d15c6ba29 | 1955 | if (current == session) { |
Vanger | 0:b86d15c6ba29 | 1956 | if (previous) |
Vanger | 0:b86d15c6ba29 | 1957 | previous->next = current->next; |
Vanger | 0:b86d15c6ba29 | 1958 | else |
Vanger | 0:b86d15c6ba29 | 1959 | SessionTable[row] = current->next; |
Vanger | 0:b86d15c6ba29 | 1960 | FreeSnifferSession(session); |
Vanger | 0:b86d15c6ba29 | 1961 | TraceRemovedSession(); |
Vanger | 0:b86d15c6ba29 | 1962 | break; |
Vanger | 0:b86d15c6ba29 | 1963 | } |
Vanger | 0:b86d15c6ba29 | 1964 | previous = current; |
Vanger | 0:b86d15c6ba29 | 1965 | current = current->next; |
Vanger | 0:b86d15c6ba29 | 1966 | } |
Vanger | 0:b86d15c6ba29 | 1967 | |
Vanger | 0:b86d15c6ba29 | 1968 | if (!haveLock) |
Vanger | 0:b86d15c6ba29 | 1969 | UnLockMutex(&SessionMutex); |
Vanger | 0:b86d15c6ba29 | 1970 | } |
Vanger | 0:b86d15c6ba29 | 1971 | |
Vanger | 0:b86d15c6ba29 | 1972 | |
Vanger | 0:b86d15c6ba29 | 1973 | /* Remove stale sessions from the Session Table, have a lock */ |
Vanger | 0:b86d15c6ba29 | 1974 | static void RemoveStaleSessions(void) |
Vanger | 0:b86d15c6ba29 | 1975 | { |
Vanger | 0:b86d15c6ba29 | 1976 | word32 i; |
Vanger | 0:b86d15c6ba29 | 1977 | SnifferSession* session; |
Vanger | 0:b86d15c6ba29 | 1978 | |
Vanger | 0:b86d15c6ba29 | 1979 | for (i = 0; i < HASH_SIZE; i++) { |
Vanger | 0:b86d15c6ba29 | 1980 | session = SessionTable[i]; |
Vanger | 0:b86d15c6ba29 | 1981 | while (session) { |
Vanger | 0:b86d15c6ba29 | 1982 | SnifferSession* next = session->next; |
Vanger | 0:b86d15c6ba29 | 1983 | if (time(NULL) >= session->lastUsed + CYASSL_SNIFFER_TIMEOUT) { |
Vanger | 0:b86d15c6ba29 | 1984 | TraceStaleSession(); |
Vanger | 0:b86d15c6ba29 | 1985 | RemoveSession(session, NULL, NULL, i); |
Vanger | 0:b86d15c6ba29 | 1986 | } |
Vanger | 0:b86d15c6ba29 | 1987 | session = next; |
Vanger | 0:b86d15c6ba29 | 1988 | } |
Vanger | 0:b86d15c6ba29 | 1989 | } |
Vanger | 0:b86d15c6ba29 | 1990 | } |
Vanger | 0:b86d15c6ba29 | 1991 | |
Vanger | 0:b86d15c6ba29 | 1992 | |
Vanger | 0:b86d15c6ba29 | 1993 | /* Create a new Sniffer Session */ |
Vanger | 0:b86d15c6ba29 | 1994 | static SnifferSession* CreateSession(IpInfo* ipInfo, TcpInfo* tcpInfo, |
Vanger | 0:b86d15c6ba29 | 1995 | char* error) |
Vanger | 0:b86d15c6ba29 | 1996 | { |
Vanger | 0:b86d15c6ba29 | 1997 | SnifferSession* session = 0; |
Vanger | 0:b86d15c6ba29 | 1998 | int row; |
Vanger | 0:b86d15c6ba29 | 1999 | |
Vanger | 0:b86d15c6ba29 | 2000 | Trace(NEW_SESSION_STR); |
Vanger | 0:b86d15c6ba29 | 2001 | /* create a new one */ |
Vanger | 0:b86d15c6ba29 | 2002 | session = (SnifferSession*)malloc(sizeof(SnifferSession)); |
Vanger | 0:b86d15c6ba29 | 2003 | if (session == NULL) { |
Vanger | 0:b86d15c6ba29 | 2004 | SetError(MEMORY_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 2005 | return 0; |
Vanger | 0:b86d15c6ba29 | 2006 | } |
Vanger | 0:b86d15c6ba29 | 2007 | InitSession(session); |
Vanger | 0:b86d15c6ba29 | 2008 | session->server = ipInfo->dst; |
Vanger | 0:b86d15c6ba29 | 2009 | session->client = ipInfo->src; |
Vanger | 0:b86d15c6ba29 | 2010 | session->srvPort = (word16)tcpInfo->dstPort; |
Vanger | 0:b86d15c6ba29 | 2011 | session->cliPort = (word16)tcpInfo->srcPort; |
Vanger | 0:b86d15c6ba29 | 2012 | session->cliSeqStart = tcpInfo->sequence; |
Vanger | 0:b86d15c6ba29 | 2013 | session->cliExpected = 1; /* relative */ |
Vanger | 0:b86d15c6ba29 | 2014 | session->lastUsed= time(NULL); |
Vanger | 0:b86d15c6ba29 | 2015 | |
Vanger | 0:b86d15c6ba29 | 2016 | session->context = GetSnifferServer(ipInfo, tcpInfo); |
Vanger | 0:b86d15c6ba29 | 2017 | if (session->context == NULL) { |
Vanger | 0:b86d15c6ba29 | 2018 | SetError(SERVER_NOT_REG_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 2019 | free(session); |
Vanger | 0:b86d15c6ba29 | 2020 | return 0; |
Vanger | 0:b86d15c6ba29 | 2021 | } |
Vanger | 0:b86d15c6ba29 | 2022 | |
Vanger | 0:b86d15c6ba29 | 2023 | session->sslServer = SSL_new(session->context->ctx); |
Vanger | 0:b86d15c6ba29 | 2024 | if (session->sslServer == NULL) { |
Vanger | 0:b86d15c6ba29 | 2025 | SetError(BAD_NEW_SSL_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2026 | free(session); |
Vanger | 0:b86d15c6ba29 | 2027 | return 0; |
Vanger | 0:b86d15c6ba29 | 2028 | } |
Vanger | 0:b86d15c6ba29 | 2029 | session->sslClient = SSL_new(session->context->ctx); |
Vanger | 0:b86d15c6ba29 | 2030 | if (session->sslClient == NULL) { |
Vanger | 0:b86d15c6ba29 | 2031 | SSL_free(session->sslServer); |
Vanger | 0:b86d15c6ba29 | 2032 | session->sslServer = 0; |
Vanger | 0:b86d15c6ba29 | 2033 | |
Vanger | 0:b86d15c6ba29 | 2034 | SetError(BAD_NEW_SSL_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2035 | free(session); |
Vanger | 0:b86d15c6ba29 | 2036 | return 0; |
Vanger | 0:b86d15c6ba29 | 2037 | } |
Vanger | 0:b86d15c6ba29 | 2038 | /* put server back into server mode */ |
Vanger | 0:b86d15c6ba29 | 2039 | session->sslServer->options.side = CYASSL_SERVER_END; |
Vanger | 0:b86d15c6ba29 | 2040 | |
Vanger | 0:b86d15c6ba29 | 2041 | row = SessionHash(ipInfo, tcpInfo); |
Vanger | 0:b86d15c6ba29 | 2042 | |
Vanger | 0:b86d15c6ba29 | 2043 | /* add it to the session table */ |
Vanger | 0:b86d15c6ba29 | 2044 | LockMutex(&SessionMutex); |
Vanger | 0:b86d15c6ba29 | 2045 | |
Vanger | 0:b86d15c6ba29 | 2046 | session->next = SessionTable[row]; |
Vanger | 0:b86d15c6ba29 | 2047 | SessionTable[row] = session; |
Vanger | 0:b86d15c6ba29 | 2048 | |
Vanger | 0:b86d15c6ba29 | 2049 | SessionCount++; |
Vanger | 0:b86d15c6ba29 | 2050 | |
Vanger | 0:b86d15c6ba29 | 2051 | if ( (SessionCount % HASH_SIZE) == 0) { |
Vanger | 0:b86d15c6ba29 | 2052 | TraceFindingStale(); |
Vanger | 0:b86d15c6ba29 | 2053 | RemoveStaleSessions(); |
Vanger | 0:b86d15c6ba29 | 2054 | } |
Vanger | 0:b86d15c6ba29 | 2055 | |
Vanger | 0:b86d15c6ba29 | 2056 | UnLockMutex(&SessionMutex); |
Vanger | 0:b86d15c6ba29 | 2057 | |
Vanger | 0:b86d15c6ba29 | 2058 | /* determine headed side */ |
Vanger | 0:b86d15c6ba29 | 2059 | if (ipInfo->dst == session->context->server && |
Vanger | 0:b86d15c6ba29 | 2060 | tcpInfo->dstPort == session->context->port) |
Vanger | 0:b86d15c6ba29 | 2061 | session->flags.side = CYASSL_SERVER_END; |
Vanger | 0:b86d15c6ba29 | 2062 | else |
Vanger | 0:b86d15c6ba29 | 2063 | session->flags.side = CYASSL_CLIENT_END; |
Vanger | 0:b86d15c6ba29 | 2064 | |
Vanger | 0:b86d15c6ba29 | 2065 | return session; |
Vanger | 0:b86d15c6ba29 | 2066 | } |
Vanger | 0:b86d15c6ba29 | 2067 | |
Vanger | 0:b86d15c6ba29 | 2068 | |
Vanger | 0:b86d15c6ba29 | 2069 | #ifdef OLD_HELLO_ALLOWED |
Vanger | 0:b86d15c6ba29 | 2070 | |
Vanger | 0:b86d15c6ba29 | 2071 | /* Process Old Client Hello Input */ |
Vanger | 0:b86d15c6ba29 | 2072 | static int DoOldHello(SnifferSession* session, const byte* sslFrame, |
Vanger | 0:b86d15c6ba29 | 2073 | int* rhSize, int* sslBytes, char* error) |
Vanger | 0:b86d15c6ba29 | 2074 | { |
Vanger | 0:b86d15c6ba29 | 2075 | const byte* input = sslFrame; |
Vanger | 0:b86d15c6ba29 | 2076 | byte b0, b1; |
Vanger | 0:b86d15c6ba29 | 2077 | word32 idx = 0; |
Vanger | 0:b86d15c6ba29 | 2078 | int ret; |
Vanger | 0:b86d15c6ba29 | 2079 | |
Vanger | 0:b86d15c6ba29 | 2080 | Trace(GOT_OLD_CLIENT_HELLO_STR); |
Vanger | 0:b86d15c6ba29 | 2081 | session->flags.clientHello = 1; /* don't process again */ |
Vanger | 0:b86d15c6ba29 | 2082 | b0 = *input++; |
Vanger | 0:b86d15c6ba29 | 2083 | b1 = *input++; |
Vanger | 0:b86d15c6ba29 | 2084 | *sslBytes -= 2; |
Vanger | 0:b86d15c6ba29 | 2085 | *rhSize = ((b0 & 0x7f) << 8) | b1; |
Vanger | 0:b86d15c6ba29 | 2086 | |
Vanger | 0:b86d15c6ba29 | 2087 | if (*rhSize > *sslBytes) { |
Vanger | 0:b86d15c6ba29 | 2088 | SetError(OLD_CLIENT_INPUT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2089 | return -1; |
Vanger | 0:b86d15c6ba29 | 2090 | } |
Vanger | 0:b86d15c6ba29 | 2091 | |
Vanger | 0:b86d15c6ba29 | 2092 | ret = ProcessOldClientHello(session->sslServer, input, &idx, *sslBytes, |
Vanger | 0:b86d15c6ba29 | 2093 | (word16)*rhSize); |
Vanger | 0:b86d15c6ba29 | 2094 | if (ret < 0 && ret != MATCH_SUITE_ERROR) { |
Vanger | 0:b86d15c6ba29 | 2095 | SetError(BAD_OLD_CLIENT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2096 | return -1; |
Vanger | 0:b86d15c6ba29 | 2097 | } |
Vanger | 0:b86d15c6ba29 | 2098 | |
Vanger | 0:b86d15c6ba29 | 2099 | Trace(OLD_CLIENT_OK_STR); |
Vanger | 0:b86d15c6ba29 | 2100 | XMEMCPY(session->sslClient->arrays->clientRandom, |
Vanger | 0:b86d15c6ba29 | 2101 | session->sslServer->arrays->clientRandom, RAN_LEN); |
Vanger | 0:b86d15c6ba29 | 2102 | |
Vanger | 0:b86d15c6ba29 | 2103 | *sslBytes -= *rhSize; |
Vanger | 0:b86d15c6ba29 | 2104 | return 0; |
Vanger | 0:b86d15c6ba29 | 2105 | } |
Vanger | 0:b86d15c6ba29 | 2106 | |
Vanger | 0:b86d15c6ba29 | 2107 | #endif /* OLD_HELLO_ALLOWED */ |
Vanger | 0:b86d15c6ba29 | 2108 | |
Vanger | 0:b86d15c6ba29 | 2109 | |
Vanger | 0:b86d15c6ba29 | 2110 | #if 0 |
Vanger | 0:b86d15c6ba29 | 2111 | /* Calculate the TCP checksum, see RFC 1071 */ |
Vanger | 0:b86d15c6ba29 | 2112 | /* return 0 for success, -1 on error */ |
Vanger | 0:b86d15c6ba29 | 2113 | /* can be called from decode() with |
Vanger | 0:b86d15c6ba29 | 2114 | TcpChecksum(&ipInfo, &tcpInfo, sslBytes, packet + ipInfo.length); |
Vanger | 0:b86d15c6ba29 | 2115 | could also add a 64bit version if type available and using this |
Vanger | 0:b86d15c6ba29 | 2116 | */ |
Vanger | 0:b86d15c6ba29 | 2117 | int TcpChecksum(IpInfo* ipInfo, TcpInfo* tcpInfo, int dataLen, |
Vanger | 0:b86d15c6ba29 | 2118 | const byte* packet) |
Vanger | 0:b86d15c6ba29 | 2119 | { |
Vanger | 0:b86d15c6ba29 | 2120 | TcpPseudoHdr pseudo; |
Vanger | 0:b86d15c6ba29 | 2121 | int count = PSEUDO_HDR_SZ; |
Vanger | 0:b86d15c6ba29 | 2122 | const word16* data = (word16*)&pseudo; |
Vanger | 0:b86d15c6ba29 | 2123 | word32 sum = 0; |
Vanger | 0:b86d15c6ba29 | 2124 | word16 checksum; |
Vanger | 0:b86d15c6ba29 | 2125 | |
Vanger | 0:b86d15c6ba29 | 2126 | pseudo.src = ipInfo->src; |
Vanger | 0:b86d15c6ba29 | 2127 | pseudo.dst = ipInfo->dst; |
Vanger | 0:b86d15c6ba29 | 2128 | pseudo.rsv = 0; |
Vanger | 0:b86d15c6ba29 | 2129 | pseudo.protocol = TCP_PROTO; |
Vanger | 0:b86d15c6ba29 | 2130 | pseudo.legnth = htons(tcpInfo->length + dataLen); |
Vanger | 0:b86d15c6ba29 | 2131 | |
Vanger | 0:b86d15c6ba29 | 2132 | /* pseudo header sum */ |
Vanger | 0:b86d15c6ba29 | 2133 | while (count >= 2) { |
Vanger | 0:b86d15c6ba29 | 2134 | sum += *data++; |
Vanger | 0:b86d15c6ba29 | 2135 | count -= 2; |
Vanger | 0:b86d15c6ba29 | 2136 | } |
Vanger | 0:b86d15c6ba29 | 2137 | |
Vanger | 0:b86d15c6ba29 | 2138 | count = tcpInfo->length + dataLen; |
Vanger | 0:b86d15c6ba29 | 2139 | data = (word16*)packet; |
Vanger | 0:b86d15c6ba29 | 2140 | |
Vanger | 0:b86d15c6ba29 | 2141 | /* main sum */ |
Vanger | 0:b86d15c6ba29 | 2142 | while (count > 1) { |
Vanger | 0:b86d15c6ba29 | 2143 | sum += *data++; |
Vanger | 0:b86d15c6ba29 | 2144 | count -=2; |
Vanger | 0:b86d15c6ba29 | 2145 | } |
Vanger | 0:b86d15c6ba29 | 2146 | |
Vanger | 0:b86d15c6ba29 | 2147 | /* get left-over, if any */ |
Vanger | 0:b86d15c6ba29 | 2148 | packet = (byte*)data; |
Vanger | 0:b86d15c6ba29 | 2149 | if (count > 0) { |
Vanger | 0:b86d15c6ba29 | 2150 | sum += *packet; |
Vanger | 0:b86d15c6ba29 | 2151 | } |
Vanger | 0:b86d15c6ba29 | 2152 | |
Vanger | 0:b86d15c6ba29 | 2153 | /* fold 32bit sum into 16 bits */ |
Vanger | 0:b86d15c6ba29 | 2154 | while (sum >> 16) |
Vanger | 0:b86d15c6ba29 | 2155 | sum = (sum & 0xffff) + (sum >> 16); |
Vanger | 0:b86d15c6ba29 | 2156 | |
Vanger | 0:b86d15c6ba29 | 2157 | checksum = (word16)~sum; |
Vanger | 0:b86d15c6ba29 | 2158 | /* checksum should now equal 0, since included already calcd checksum */ |
Vanger | 0:b86d15c6ba29 | 2159 | /* field, but tcp checksum offloading could negate calculation */ |
Vanger | 0:b86d15c6ba29 | 2160 | if (checksum == 0) |
Vanger | 0:b86d15c6ba29 | 2161 | return 0; |
Vanger | 0:b86d15c6ba29 | 2162 | return -1; |
Vanger | 0:b86d15c6ba29 | 2163 | } |
Vanger | 0:b86d15c6ba29 | 2164 | #endif |
Vanger | 0:b86d15c6ba29 | 2165 | |
Vanger | 0:b86d15c6ba29 | 2166 | |
Vanger | 0:b86d15c6ba29 | 2167 | /* Check IP and TCP headers, set payload */ |
Vanger | 0:b86d15c6ba29 | 2168 | /* returns 0 on success, -1 on error */ |
Vanger | 0:b86d15c6ba29 | 2169 | static int CheckHeaders(IpInfo* ipInfo, TcpInfo* tcpInfo, const byte* packet, |
Vanger | 0:b86d15c6ba29 | 2170 | int length, const byte** sslFrame, int* sslBytes, char* error) |
Vanger | 0:b86d15c6ba29 | 2171 | { |
Vanger | 0:b86d15c6ba29 | 2172 | TraceHeader(); |
Vanger | 0:b86d15c6ba29 | 2173 | TracePacket(); |
Vanger | 0:b86d15c6ba29 | 2174 | |
Vanger | 0:b86d15c6ba29 | 2175 | /* ip header */ |
Vanger | 0:b86d15c6ba29 | 2176 | if (length < IP_HDR_SZ) { |
Vanger | 0:b86d15c6ba29 | 2177 | SetError(PACKET_HDR_SHORT_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 2178 | return -1; |
Vanger | 0:b86d15c6ba29 | 2179 | } |
Vanger | 0:b86d15c6ba29 | 2180 | if (CheckIpHdr((IpHdr*)packet, ipInfo, length, error) != 0) |
Vanger | 0:b86d15c6ba29 | 2181 | return -1; |
Vanger | 0:b86d15c6ba29 | 2182 | |
Vanger | 0:b86d15c6ba29 | 2183 | /* tcp header */ |
Vanger | 0:b86d15c6ba29 | 2184 | if (length < (ipInfo->length + TCP_HDR_SZ)) { |
Vanger | 0:b86d15c6ba29 | 2185 | SetError(PACKET_HDR_SHORT_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 2186 | return -1; |
Vanger | 0:b86d15c6ba29 | 2187 | } |
Vanger | 0:b86d15c6ba29 | 2188 | if (CheckTcpHdr((TcpHdr*)(packet + ipInfo->length), tcpInfo, error) != 0) |
Vanger | 0:b86d15c6ba29 | 2189 | return -1; |
Vanger | 0:b86d15c6ba29 | 2190 | |
Vanger | 0:b86d15c6ba29 | 2191 | /* setup */ |
Vanger | 0:b86d15c6ba29 | 2192 | *sslFrame = packet + ipInfo->length + tcpInfo->length; |
Vanger | 0:b86d15c6ba29 | 2193 | if (*sslFrame > packet + length) { |
Vanger | 0:b86d15c6ba29 | 2194 | SetError(PACKET_HDR_SHORT_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 2195 | return -1; |
Vanger | 0:b86d15c6ba29 | 2196 | } |
Vanger | 0:b86d15c6ba29 | 2197 | *sslBytes = (int)(packet + length - *sslFrame); |
Vanger | 0:b86d15c6ba29 | 2198 | |
Vanger | 0:b86d15c6ba29 | 2199 | return 0; |
Vanger | 0:b86d15c6ba29 | 2200 | } |
Vanger | 0:b86d15c6ba29 | 2201 | |
Vanger | 0:b86d15c6ba29 | 2202 | |
Vanger | 0:b86d15c6ba29 | 2203 | /* Create or Find existing session */ |
Vanger | 0:b86d15c6ba29 | 2204 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */ |
Vanger | 0:b86d15c6ba29 | 2205 | static int CheckSession(IpInfo* ipInfo, TcpInfo* tcpInfo, int sslBytes, |
Vanger | 0:b86d15c6ba29 | 2206 | SnifferSession** session, char* error) |
Vanger | 0:b86d15c6ba29 | 2207 | { |
Vanger | 0:b86d15c6ba29 | 2208 | /* create a new SnifferSession on client SYN */ |
Vanger | 0:b86d15c6ba29 | 2209 | if (tcpInfo->syn && !tcpInfo->ack) { |
Vanger | 0:b86d15c6ba29 | 2210 | TraceClientSyn(tcpInfo->sequence); |
Vanger | 0:b86d15c6ba29 | 2211 | *session = CreateSession(ipInfo, tcpInfo, error); |
Vanger | 0:b86d15c6ba29 | 2212 | if (*session == NULL) { |
Vanger | 0:b86d15c6ba29 | 2213 | *session = GetSnifferSession(ipInfo, tcpInfo); |
Vanger | 0:b86d15c6ba29 | 2214 | /* already had exisiting, so OK */ |
Vanger | 0:b86d15c6ba29 | 2215 | if (*session) |
Vanger | 0:b86d15c6ba29 | 2216 | return 1; |
Vanger | 0:b86d15c6ba29 | 2217 | |
Vanger | 0:b86d15c6ba29 | 2218 | SetError(MEMORY_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 2219 | return -1; |
Vanger | 0:b86d15c6ba29 | 2220 | } |
Vanger | 0:b86d15c6ba29 | 2221 | return 1; |
Vanger | 0:b86d15c6ba29 | 2222 | } |
Vanger | 0:b86d15c6ba29 | 2223 | /* get existing sniffer session */ |
Vanger | 0:b86d15c6ba29 | 2224 | else { |
Vanger | 0:b86d15c6ba29 | 2225 | *session = GetSnifferSession(ipInfo, tcpInfo); |
Vanger | 0:b86d15c6ba29 | 2226 | if (*session == NULL) { |
Vanger | 0:b86d15c6ba29 | 2227 | /* don't worry about extraneous RST or duplicate FINs */ |
Vanger | 0:b86d15c6ba29 | 2228 | if (tcpInfo->fin || tcpInfo->rst) |
Vanger | 0:b86d15c6ba29 | 2229 | return 1; |
Vanger | 0:b86d15c6ba29 | 2230 | /* don't worry about duplicate ACKs either */ |
Vanger | 0:b86d15c6ba29 | 2231 | if (sslBytes == 0 && tcpInfo->ack) |
Vanger | 0:b86d15c6ba29 | 2232 | return 1; |
Vanger | 0:b86d15c6ba29 | 2233 | |
Vanger | 0:b86d15c6ba29 | 2234 | SetError(BAD_SESSION_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 2235 | return -1; |
Vanger | 0:b86d15c6ba29 | 2236 | } |
Vanger | 0:b86d15c6ba29 | 2237 | } |
Vanger | 0:b86d15c6ba29 | 2238 | return 0; |
Vanger | 0:b86d15c6ba29 | 2239 | } |
Vanger | 0:b86d15c6ba29 | 2240 | |
Vanger | 0:b86d15c6ba29 | 2241 | |
Vanger | 0:b86d15c6ba29 | 2242 | /* Create a Packet Buffer from *begin - end, adjust new *begin and bytesLeft */ |
Vanger | 0:b86d15c6ba29 | 2243 | static PacketBuffer* CreateBuffer(word32* begin, word32 end, const byte* data, |
Vanger | 0:b86d15c6ba29 | 2244 | int* bytesLeft) |
Vanger | 0:b86d15c6ba29 | 2245 | { |
Vanger | 0:b86d15c6ba29 | 2246 | PacketBuffer* pb; |
Vanger | 0:b86d15c6ba29 | 2247 | |
Vanger | 0:b86d15c6ba29 | 2248 | int added = end - *begin + 1; |
Vanger | 0:b86d15c6ba29 | 2249 | assert(*begin <= end); |
Vanger | 0:b86d15c6ba29 | 2250 | |
Vanger | 0:b86d15c6ba29 | 2251 | pb = (PacketBuffer*)malloc(sizeof(PacketBuffer)); |
Vanger | 0:b86d15c6ba29 | 2252 | if (pb == NULL) return NULL; |
Vanger | 0:b86d15c6ba29 | 2253 | |
Vanger | 0:b86d15c6ba29 | 2254 | pb->next = 0; |
Vanger | 0:b86d15c6ba29 | 2255 | pb->begin = *begin; |
Vanger | 0:b86d15c6ba29 | 2256 | pb->end = end; |
Vanger | 0:b86d15c6ba29 | 2257 | pb->data = (byte*)malloc(added); |
Vanger | 0:b86d15c6ba29 | 2258 | |
Vanger | 0:b86d15c6ba29 | 2259 | if (pb->data == NULL) { |
Vanger | 0:b86d15c6ba29 | 2260 | free(pb); |
Vanger | 0:b86d15c6ba29 | 2261 | return NULL; |
Vanger | 0:b86d15c6ba29 | 2262 | } |
Vanger | 0:b86d15c6ba29 | 2263 | XMEMCPY(pb->data, data, added); |
Vanger | 0:b86d15c6ba29 | 2264 | |
Vanger | 0:b86d15c6ba29 | 2265 | *bytesLeft -= added; |
Vanger | 0:b86d15c6ba29 | 2266 | *begin = pb->end + 1; |
Vanger | 0:b86d15c6ba29 | 2267 | |
Vanger | 0:b86d15c6ba29 | 2268 | return pb; |
Vanger | 0:b86d15c6ba29 | 2269 | } |
Vanger | 0:b86d15c6ba29 | 2270 | |
Vanger | 0:b86d15c6ba29 | 2271 | |
Vanger | 0:b86d15c6ba29 | 2272 | /* Add sslFrame to Reassembly List */ |
Vanger | 0:b86d15c6ba29 | 2273 | /* returns 1 (end) on success, -1, on error */ |
Vanger | 0:b86d15c6ba29 | 2274 | static int AddToReassembly(byte from, word32 seq, const byte* sslFrame, |
Vanger | 0:b86d15c6ba29 | 2275 | int sslBytes, SnifferSession* session, char* error) |
Vanger | 0:b86d15c6ba29 | 2276 | { |
Vanger | 0:b86d15c6ba29 | 2277 | PacketBuffer* add; |
Vanger | 0:b86d15c6ba29 | 2278 | PacketBuffer** front = (from == CYASSL_SERVER_END) ? |
Vanger | 0:b86d15c6ba29 | 2279 | &session->cliReassemblyList: &session->srvReassemblyList; |
Vanger | 0:b86d15c6ba29 | 2280 | PacketBuffer* curr = *front; |
Vanger | 0:b86d15c6ba29 | 2281 | PacketBuffer* prev = curr; |
Vanger | 0:b86d15c6ba29 | 2282 | |
Vanger | 0:b86d15c6ba29 | 2283 | word32 startSeq = seq; |
Vanger | 0:b86d15c6ba29 | 2284 | word32 added; |
Vanger | 0:b86d15c6ba29 | 2285 | int bytesLeft = sslBytes; /* could be overlapping fragment */ |
Vanger | 0:b86d15c6ba29 | 2286 | |
Vanger | 0:b86d15c6ba29 | 2287 | /* if list is empty add full frame to front */ |
Vanger | 0:b86d15c6ba29 | 2288 | if (!curr) { |
Vanger | 0:b86d15c6ba29 | 2289 | add = CreateBuffer(&seq, seq + sslBytes - 1, sslFrame, &bytesLeft); |
Vanger | 0:b86d15c6ba29 | 2290 | if (add == NULL) { |
Vanger | 0:b86d15c6ba29 | 2291 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2292 | return -1; |
Vanger | 0:b86d15c6ba29 | 2293 | } |
Vanger | 0:b86d15c6ba29 | 2294 | *front = add; |
Vanger | 0:b86d15c6ba29 | 2295 | return 1; |
Vanger | 0:b86d15c6ba29 | 2296 | } |
Vanger | 0:b86d15c6ba29 | 2297 | |
Vanger | 0:b86d15c6ba29 | 2298 | /* add to front if before current front, up to next->begin */ |
Vanger | 0:b86d15c6ba29 | 2299 | if (seq < curr->begin) { |
Vanger | 0:b86d15c6ba29 | 2300 | word32 end = seq + sslBytes - 1; |
Vanger | 0:b86d15c6ba29 | 2301 | |
Vanger | 0:b86d15c6ba29 | 2302 | if (end >= curr->begin) |
Vanger | 0:b86d15c6ba29 | 2303 | end = curr->begin - 1; |
Vanger | 0:b86d15c6ba29 | 2304 | |
Vanger | 0:b86d15c6ba29 | 2305 | add = CreateBuffer(&seq, end, sslFrame, &bytesLeft); |
Vanger | 0:b86d15c6ba29 | 2306 | if (add == NULL) { |
Vanger | 0:b86d15c6ba29 | 2307 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2308 | return -1; |
Vanger | 0:b86d15c6ba29 | 2309 | } |
Vanger | 0:b86d15c6ba29 | 2310 | add->next = curr; |
Vanger | 0:b86d15c6ba29 | 2311 | *front = add; |
Vanger | 0:b86d15c6ba29 | 2312 | } |
Vanger | 0:b86d15c6ba29 | 2313 | |
Vanger | 0:b86d15c6ba29 | 2314 | /* while we have bytes left, try to find a gap to fill */ |
Vanger | 0:b86d15c6ba29 | 2315 | while (bytesLeft > 0) { |
Vanger | 0:b86d15c6ba29 | 2316 | /* get previous packet in list */ |
Vanger | 0:b86d15c6ba29 | 2317 | while (curr && (seq >= curr->begin)) { |
Vanger | 0:b86d15c6ba29 | 2318 | prev = curr; |
Vanger | 0:b86d15c6ba29 | 2319 | curr = curr->next; |
Vanger | 0:b86d15c6ba29 | 2320 | } |
Vanger | 0:b86d15c6ba29 | 2321 | |
Vanger | 0:b86d15c6ba29 | 2322 | /* don't add duplicate data */ |
Vanger | 0:b86d15c6ba29 | 2323 | if (prev->end >= seq) { |
Vanger | 0:b86d15c6ba29 | 2324 | if ( (seq + bytesLeft - 1) <= prev->end) |
Vanger | 0:b86d15c6ba29 | 2325 | return 1; |
Vanger | 0:b86d15c6ba29 | 2326 | seq = prev->end + 1; |
Vanger | 0:b86d15c6ba29 | 2327 | bytesLeft = startSeq + sslBytes - seq; |
Vanger | 0:b86d15c6ba29 | 2328 | } |
Vanger | 0:b86d15c6ba29 | 2329 | |
Vanger | 0:b86d15c6ba29 | 2330 | if (!curr) |
Vanger | 0:b86d15c6ba29 | 2331 | /* we're at the end */ |
Vanger | 0:b86d15c6ba29 | 2332 | added = bytesLeft; |
Vanger | 0:b86d15c6ba29 | 2333 | else |
Vanger | 0:b86d15c6ba29 | 2334 | /* we're in between two frames */ |
Vanger | 0:b86d15c6ba29 | 2335 | added = min((word32)bytesLeft, curr->begin - seq); |
Vanger | 0:b86d15c6ba29 | 2336 | |
Vanger | 0:b86d15c6ba29 | 2337 | /* data already there */ |
Vanger | 0:b86d15c6ba29 | 2338 | if (added == 0) |
Vanger | 0:b86d15c6ba29 | 2339 | continue; |
Vanger | 0:b86d15c6ba29 | 2340 | |
Vanger | 0:b86d15c6ba29 | 2341 | add = CreateBuffer(&seq, seq + added - 1, &sslFrame[seq - startSeq], |
Vanger | 0:b86d15c6ba29 | 2342 | &bytesLeft); |
Vanger | 0:b86d15c6ba29 | 2343 | if (add == NULL) { |
Vanger | 0:b86d15c6ba29 | 2344 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2345 | return -1; |
Vanger | 0:b86d15c6ba29 | 2346 | } |
Vanger | 0:b86d15c6ba29 | 2347 | add->next = prev->next; |
Vanger | 0:b86d15c6ba29 | 2348 | prev->next = add; |
Vanger | 0:b86d15c6ba29 | 2349 | } |
Vanger | 0:b86d15c6ba29 | 2350 | return 1; |
Vanger | 0:b86d15c6ba29 | 2351 | } |
Vanger | 0:b86d15c6ba29 | 2352 | |
Vanger | 0:b86d15c6ba29 | 2353 | |
Vanger | 0:b86d15c6ba29 | 2354 | /* Add out of order FIN capture */ |
Vanger | 0:b86d15c6ba29 | 2355 | /* returns 1 for success (end) */ |
Vanger | 0:b86d15c6ba29 | 2356 | static int AddFinCapture(SnifferSession* session, word32 sequence) |
Vanger | 0:b86d15c6ba29 | 2357 | { |
Vanger | 0:b86d15c6ba29 | 2358 | if (session->flags.side == CYASSL_SERVER_END) { |
Vanger | 0:b86d15c6ba29 | 2359 | if (session->finCaputre.cliCounted == 0) |
Vanger | 0:b86d15c6ba29 | 2360 | session->finCaputre.cliFinSeq = sequence; |
Vanger | 0:b86d15c6ba29 | 2361 | } |
Vanger | 0:b86d15c6ba29 | 2362 | else { |
Vanger | 0:b86d15c6ba29 | 2363 | if (session->finCaputre.srvCounted == 0) |
Vanger | 0:b86d15c6ba29 | 2364 | session->finCaputre.srvFinSeq = sequence; |
Vanger | 0:b86d15c6ba29 | 2365 | } |
Vanger | 0:b86d15c6ba29 | 2366 | return 1; |
Vanger | 0:b86d15c6ba29 | 2367 | } |
Vanger | 0:b86d15c6ba29 | 2368 | |
Vanger | 0:b86d15c6ba29 | 2369 | |
Vanger | 0:b86d15c6ba29 | 2370 | /* Adjust incoming sequence based on side */ |
Vanger | 0:b86d15c6ba29 | 2371 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */ |
Vanger | 0:b86d15c6ba29 | 2372 | static int AdjustSequence(TcpInfo* tcpInfo, SnifferSession* session, |
Vanger | 0:b86d15c6ba29 | 2373 | int* sslBytes, const byte** sslFrame, char* error) |
Vanger | 0:b86d15c6ba29 | 2374 | { |
Vanger | 0:b86d15c6ba29 | 2375 | word32 seqStart = (session->flags.side == CYASSL_SERVER_END) ? |
Vanger | 0:b86d15c6ba29 | 2376 | session->cliSeqStart :session->srvSeqStart; |
Vanger | 0:b86d15c6ba29 | 2377 | word32 real = tcpInfo->sequence - seqStart; |
Vanger | 0:b86d15c6ba29 | 2378 | word32* expected = (session->flags.side == CYASSL_SERVER_END) ? |
Vanger | 0:b86d15c6ba29 | 2379 | &session->cliExpected : &session->srvExpected; |
Vanger | 0:b86d15c6ba29 | 2380 | PacketBuffer* reassemblyList = (session->flags.side == CYASSL_SERVER_END) ? |
Vanger | 0:b86d15c6ba29 | 2381 | session->cliReassemblyList : session->srvReassemblyList; |
Vanger | 0:b86d15c6ba29 | 2382 | |
Vanger | 0:b86d15c6ba29 | 2383 | /* handle rollover of sequence */ |
Vanger | 0:b86d15c6ba29 | 2384 | if (tcpInfo->sequence < seqStart) |
Vanger | 0:b86d15c6ba29 | 2385 | real = 0xffffffffU - seqStart + tcpInfo->sequence; |
Vanger | 0:b86d15c6ba29 | 2386 | |
Vanger | 0:b86d15c6ba29 | 2387 | TraceRelativeSequence(*expected, real); |
Vanger | 0:b86d15c6ba29 | 2388 | |
Vanger | 0:b86d15c6ba29 | 2389 | if (real < *expected) { |
Vanger | 0:b86d15c6ba29 | 2390 | Trace(DUPLICATE_STR); |
Vanger | 0:b86d15c6ba29 | 2391 | if (real + *sslBytes > *expected) { |
Vanger | 0:b86d15c6ba29 | 2392 | int overlap = *expected - real; |
Vanger | 0:b86d15c6ba29 | 2393 | Trace(OVERLAP_DUPLICATE_STR); |
Vanger | 0:b86d15c6ba29 | 2394 | |
Vanger | 0:b86d15c6ba29 | 2395 | /* adjust to expected, remove duplicate */ |
Vanger | 0:b86d15c6ba29 | 2396 | *sslFrame += overlap; |
Vanger | 0:b86d15c6ba29 | 2397 | *sslBytes -= overlap; |
Vanger | 0:b86d15c6ba29 | 2398 | |
Vanger | 0:b86d15c6ba29 | 2399 | if (reassemblyList) { |
Vanger | 0:b86d15c6ba29 | 2400 | word32 newEnd = *expected + *sslBytes; |
Vanger | 0:b86d15c6ba29 | 2401 | |
Vanger | 0:b86d15c6ba29 | 2402 | if (newEnd > reassemblyList->begin) { |
Vanger | 0:b86d15c6ba29 | 2403 | Trace(OVERLAP_REASSEMBLY_BEGIN_STR); |
Vanger | 0:b86d15c6ba29 | 2404 | |
Vanger | 0:b86d15c6ba29 | 2405 | /* remove bytes already on reassembly list */ |
Vanger | 0:b86d15c6ba29 | 2406 | *sslBytes -= newEnd - reassemblyList->begin; |
Vanger | 0:b86d15c6ba29 | 2407 | } |
Vanger | 0:b86d15c6ba29 | 2408 | if (newEnd > reassemblyList->end) { |
Vanger | 0:b86d15c6ba29 | 2409 | Trace(OVERLAP_REASSEMBLY_END_STR); |
Vanger | 0:b86d15c6ba29 | 2410 | |
Vanger | 0:b86d15c6ba29 | 2411 | /* may be past reassembly list end (could have more on list) |
Vanger | 0:b86d15c6ba29 | 2412 | so try to add what's past the front->end */ |
Vanger | 0:b86d15c6ba29 | 2413 | AddToReassembly(session->flags.side, reassemblyList->end +1, |
Vanger | 0:b86d15c6ba29 | 2414 | *sslFrame + reassemblyList->end - *expected + 1, |
Vanger | 0:b86d15c6ba29 | 2415 | newEnd - reassemblyList->end, session, error); |
Vanger | 0:b86d15c6ba29 | 2416 | } |
Vanger | 0:b86d15c6ba29 | 2417 | } |
Vanger | 0:b86d15c6ba29 | 2418 | } |
Vanger | 0:b86d15c6ba29 | 2419 | else |
Vanger | 0:b86d15c6ba29 | 2420 | return 1; |
Vanger | 0:b86d15c6ba29 | 2421 | } |
Vanger | 0:b86d15c6ba29 | 2422 | else if (real > *expected) { |
Vanger | 0:b86d15c6ba29 | 2423 | Trace(OUT_OF_ORDER_STR); |
Vanger | 0:b86d15c6ba29 | 2424 | if (*sslBytes > 0) |
Vanger | 0:b86d15c6ba29 | 2425 | return AddToReassembly(session->flags.side, real, *sslFrame, |
Vanger | 0:b86d15c6ba29 | 2426 | *sslBytes, session, error); |
Vanger | 0:b86d15c6ba29 | 2427 | else if (tcpInfo->fin) |
Vanger | 0:b86d15c6ba29 | 2428 | return AddFinCapture(session, real); |
Vanger | 0:b86d15c6ba29 | 2429 | } |
Vanger | 0:b86d15c6ba29 | 2430 | /* got expected sequence */ |
Vanger | 0:b86d15c6ba29 | 2431 | *expected += *sslBytes; |
Vanger | 0:b86d15c6ba29 | 2432 | if (tcpInfo->fin) |
Vanger | 0:b86d15c6ba29 | 2433 | *expected += 1; |
Vanger | 0:b86d15c6ba29 | 2434 | |
Vanger | 0:b86d15c6ba29 | 2435 | return 0; |
Vanger | 0:b86d15c6ba29 | 2436 | } |
Vanger | 0:b86d15c6ba29 | 2437 | |
Vanger | 0:b86d15c6ba29 | 2438 | |
Vanger | 0:b86d15c6ba29 | 2439 | /* Check latest ack number for missing packets |
Vanger | 0:b86d15c6ba29 | 2440 | return 0 ok, <0 on error */ |
Vanger | 0:b86d15c6ba29 | 2441 | static int CheckAck(TcpInfo* tcpInfo, SnifferSession* session) |
Vanger | 0:b86d15c6ba29 | 2442 | { |
Vanger | 0:b86d15c6ba29 | 2443 | if (tcpInfo->ack) { |
Vanger | 0:b86d15c6ba29 | 2444 | word32 seqStart = (session->flags.side == CYASSL_SERVER_END) ? |
Vanger | 0:b86d15c6ba29 | 2445 | session->srvSeqStart :session->cliSeqStart; |
Vanger | 0:b86d15c6ba29 | 2446 | word32 real = tcpInfo->ackNumber - seqStart; |
Vanger | 0:b86d15c6ba29 | 2447 | word32 expected = (session->flags.side == CYASSL_SERVER_END) ? |
Vanger | 0:b86d15c6ba29 | 2448 | session->srvExpected : session->cliExpected; |
Vanger | 0:b86d15c6ba29 | 2449 | |
Vanger | 0:b86d15c6ba29 | 2450 | /* handle rollover of sequence */ |
Vanger | 0:b86d15c6ba29 | 2451 | if (tcpInfo->ackNumber < seqStart) |
Vanger | 0:b86d15c6ba29 | 2452 | real = 0xffffffffU - seqStart + tcpInfo->ackNumber; |
Vanger | 0:b86d15c6ba29 | 2453 | |
Vanger | 0:b86d15c6ba29 | 2454 | TraceAck(real, expected); |
Vanger | 0:b86d15c6ba29 | 2455 | |
Vanger | 0:b86d15c6ba29 | 2456 | if (real > expected) |
Vanger | 0:b86d15c6ba29 | 2457 | return -1; /* we missed a packet, ACKing data we never saw */ |
Vanger | 0:b86d15c6ba29 | 2458 | } |
Vanger | 0:b86d15c6ba29 | 2459 | return 0; |
Vanger | 0:b86d15c6ba29 | 2460 | } |
Vanger | 0:b86d15c6ba29 | 2461 | |
Vanger | 0:b86d15c6ba29 | 2462 | |
Vanger | 0:b86d15c6ba29 | 2463 | /* Check TCP Sequence status */ |
Vanger | 0:b86d15c6ba29 | 2464 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */ |
Vanger | 0:b86d15c6ba29 | 2465 | static int CheckSequence(IpInfo* ipInfo, TcpInfo* tcpInfo, |
Vanger | 0:b86d15c6ba29 | 2466 | SnifferSession* session, int* sslBytes, |
Vanger | 0:b86d15c6ba29 | 2467 | const byte** sslFrame, char* error) |
Vanger | 0:b86d15c6ba29 | 2468 | { |
Vanger | 0:b86d15c6ba29 | 2469 | int actualLen; |
Vanger | 0:b86d15c6ba29 | 2470 | |
Vanger | 0:b86d15c6ba29 | 2471 | /* init SEQ from server to client */ |
Vanger | 0:b86d15c6ba29 | 2472 | if (tcpInfo->syn && tcpInfo->ack) { |
Vanger | 0:b86d15c6ba29 | 2473 | session->srvSeqStart = tcpInfo->sequence; |
Vanger | 0:b86d15c6ba29 | 2474 | session->srvExpected = 1; |
Vanger | 0:b86d15c6ba29 | 2475 | TraceServerSyn(tcpInfo->sequence); |
Vanger | 0:b86d15c6ba29 | 2476 | return 1; |
Vanger | 0:b86d15c6ba29 | 2477 | } |
Vanger | 0:b86d15c6ba29 | 2478 | |
Vanger | 0:b86d15c6ba29 | 2479 | /* adjust potential ethernet trailer */ |
Vanger | 0:b86d15c6ba29 | 2480 | actualLen = ipInfo->total - ipInfo->length - tcpInfo->length; |
Vanger | 0:b86d15c6ba29 | 2481 | if (*sslBytes > actualLen) { |
Vanger | 0:b86d15c6ba29 | 2482 | *sslBytes = actualLen; |
Vanger | 0:b86d15c6ba29 | 2483 | } |
Vanger | 0:b86d15c6ba29 | 2484 | |
Vanger | 0:b86d15c6ba29 | 2485 | TraceSequence(tcpInfo->sequence, *sslBytes); |
Vanger | 0:b86d15c6ba29 | 2486 | if (CheckAck(tcpInfo, session) < 0) { |
Vanger | 0:b86d15c6ba29 | 2487 | SetError(ACK_MISSED_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2488 | return -1; |
Vanger | 0:b86d15c6ba29 | 2489 | } |
Vanger | 0:b86d15c6ba29 | 2490 | |
Vanger | 0:b86d15c6ba29 | 2491 | return AdjustSequence(tcpInfo, session, sslBytes, sslFrame, error); |
Vanger | 0:b86d15c6ba29 | 2492 | } |
Vanger | 0:b86d15c6ba29 | 2493 | |
Vanger | 0:b86d15c6ba29 | 2494 | |
Vanger | 0:b86d15c6ba29 | 2495 | /* Check Status before record processing */ |
Vanger | 0:b86d15c6ba29 | 2496 | /* returns 0 on success (continue), -1 on error, 1 on success (end) */ |
Vanger | 0:b86d15c6ba29 | 2497 | static int CheckPreRecord(IpInfo* ipInfo, TcpInfo* tcpInfo, |
Vanger | 0:b86d15c6ba29 | 2498 | const byte** sslFrame, SnifferSession** session, |
Vanger | 0:b86d15c6ba29 | 2499 | int* sslBytes, const byte** end, char* error) |
Vanger | 0:b86d15c6ba29 | 2500 | { |
Vanger | 0:b86d15c6ba29 | 2501 | word32 length; |
Vanger | 0:b86d15c6ba29 | 2502 | SSL* ssl = ((*session)->flags.side == CYASSL_SERVER_END) ? |
Vanger | 0:b86d15c6ba29 | 2503 | (*session)->sslServer : (*session)->sslClient; |
Vanger | 0:b86d15c6ba29 | 2504 | /* remove SnifferSession on 2nd FIN or RST */ |
Vanger | 0:b86d15c6ba29 | 2505 | if (tcpInfo->fin || tcpInfo->rst) { |
Vanger | 0:b86d15c6ba29 | 2506 | /* flag FIN and RST */ |
Vanger | 0:b86d15c6ba29 | 2507 | if (tcpInfo->fin) |
Vanger | 0:b86d15c6ba29 | 2508 | (*session)->flags.finCount += 1; |
Vanger | 0:b86d15c6ba29 | 2509 | else if (tcpInfo->rst) |
Vanger | 0:b86d15c6ba29 | 2510 | (*session)->flags.finCount += 2; |
Vanger | 0:b86d15c6ba29 | 2511 | |
Vanger | 0:b86d15c6ba29 | 2512 | if ((*session)->flags.finCount >= 2) { |
Vanger | 0:b86d15c6ba29 | 2513 | RemoveSession(*session, ipInfo, tcpInfo, 0); |
Vanger | 0:b86d15c6ba29 | 2514 | *session = NULL; |
Vanger | 0:b86d15c6ba29 | 2515 | return 1; |
Vanger | 0:b86d15c6ba29 | 2516 | } |
Vanger | 0:b86d15c6ba29 | 2517 | } |
Vanger | 0:b86d15c6ba29 | 2518 | |
Vanger | 0:b86d15c6ba29 | 2519 | if ((*session)->flags.fatalError == FATAL_ERROR_STATE) { |
Vanger | 0:b86d15c6ba29 | 2520 | SetError(FATAL_ERROR_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 2521 | return -1; |
Vanger | 0:b86d15c6ba29 | 2522 | } |
Vanger | 0:b86d15c6ba29 | 2523 | |
Vanger | 0:b86d15c6ba29 | 2524 | if (*sslBytes == 0) { |
Vanger | 0:b86d15c6ba29 | 2525 | Trace(NO_DATA_STR); |
Vanger | 0:b86d15c6ba29 | 2526 | return 1; |
Vanger | 0:b86d15c6ba29 | 2527 | } |
Vanger | 0:b86d15c6ba29 | 2528 | |
Vanger | 0:b86d15c6ba29 | 2529 | /* if current partial data, add to end of partial */ |
Vanger | 0:b86d15c6ba29 | 2530 | if ( (length = ssl->buffers.inputBuffer.length) ) { |
Vanger | 0:b86d15c6ba29 | 2531 | Trace(PARTIAL_ADD_STR); |
Vanger | 0:b86d15c6ba29 | 2532 | |
Vanger | 0:b86d15c6ba29 | 2533 | if ( (*sslBytes + length) > ssl->buffers.inputBuffer.bufferSize) { |
Vanger | 0:b86d15c6ba29 | 2534 | if (GrowInputBuffer(ssl, *sslBytes, length) < 0) { |
Vanger | 0:b86d15c6ba29 | 2535 | SetError(MEMORY_STR, error, *session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2536 | return -1; |
Vanger | 0:b86d15c6ba29 | 2537 | } |
Vanger | 0:b86d15c6ba29 | 2538 | } |
Vanger | 0:b86d15c6ba29 | 2539 | XMEMCPY(&ssl->buffers.inputBuffer.buffer[length], *sslFrame, *sslBytes); |
Vanger | 0:b86d15c6ba29 | 2540 | *sslBytes += length; |
Vanger | 0:b86d15c6ba29 | 2541 | ssl->buffers.inputBuffer.length = *sslBytes; |
Vanger | 0:b86d15c6ba29 | 2542 | *sslFrame = ssl->buffers.inputBuffer.buffer; |
Vanger | 0:b86d15c6ba29 | 2543 | *end = *sslFrame + *sslBytes; |
Vanger | 0:b86d15c6ba29 | 2544 | } |
Vanger | 0:b86d15c6ba29 | 2545 | |
Vanger | 0:b86d15c6ba29 | 2546 | if ((*session)->flags.clientHello == 0 && **sslFrame != handshake) { |
Vanger | 0:b86d15c6ba29 | 2547 | /* Sanity check the packet for an old style client hello. */ |
Vanger | 0:b86d15c6ba29 | 2548 | int rhSize = (((*sslFrame)[0] & 0x7f) << 8) | ((*sslFrame)[1]); |
Vanger | 0:b86d15c6ba29 | 2549 | |
Vanger | 0:b86d15c6ba29 | 2550 | if ((rhSize <= (*sslBytes - 2)) && |
Vanger | 0:b86d15c6ba29 | 2551 | (*sslFrame)[2] == OLD_HELLO_ID && (*sslFrame)[3] == SSLv3_MAJOR) { |
Vanger | 0:b86d15c6ba29 | 2552 | #ifdef OLD_HELLO_ALLOWED |
Vanger | 0:b86d15c6ba29 | 2553 | int ret = DoOldHello(*session, *sslFrame, &rhSize, sslBytes, error); |
Vanger | 0:b86d15c6ba29 | 2554 | if (ret < 0) |
Vanger | 0:b86d15c6ba29 | 2555 | return -1; /* error already set */ |
Vanger | 0:b86d15c6ba29 | 2556 | if (*sslBytes <= 0) |
Vanger | 0:b86d15c6ba29 | 2557 | return 1; |
Vanger | 0:b86d15c6ba29 | 2558 | #endif |
Vanger | 0:b86d15c6ba29 | 2559 | } |
Vanger | 0:b86d15c6ba29 | 2560 | else { |
Vanger | 0:b86d15c6ba29 | 2561 | #ifdef STARTTLS_ALLOWED |
Vanger | 0:b86d15c6ba29 | 2562 | return 1; |
Vanger | 0:b86d15c6ba29 | 2563 | #endif |
Vanger | 0:b86d15c6ba29 | 2564 | } |
Vanger | 0:b86d15c6ba29 | 2565 | } |
Vanger | 0:b86d15c6ba29 | 2566 | |
Vanger | 0:b86d15c6ba29 | 2567 | return 0; |
Vanger | 0:b86d15c6ba29 | 2568 | } |
Vanger | 0:b86d15c6ba29 | 2569 | |
Vanger | 0:b86d15c6ba29 | 2570 | |
Vanger | 0:b86d15c6ba29 | 2571 | /* See if input on the reassembly list is ready for consuming */ |
Vanger | 0:b86d15c6ba29 | 2572 | /* returns 1 for TRUE, 0 for FALSE */ |
Vanger | 0:b86d15c6ba29 | 2573 | static int HaveMoreInput(SnifferSession* session, const byte** sslFrame, |
Vanger | 0:b86d15c6ba29 | 2574 | int* sslBytes, const byte** end, char* error) |
Vanger | 0:b86d15c6ba29 | 2575 | { |
Vanger | 0:b86d15c6ba29 | 2576 | /* sequence and reassembly based on from, not to */ |
Vanger | 0:b86d15c6ba29 | 2577 | int moreInput = 0; |
Vanger | 0:b86d15c6ba29 | 2578 | PacketBuffer** front = (session->flags.side == CYASSL_SERVER_END) ? |
Vanger | 0:b86d15c6ba29 | 2579 | &session->cliReassemblyList : &session->srvReassemblyList; |
Vanger | 0:b86d15c6ba29 | 2580 | word32* expected = (session->flags.side == CYASSL_SERVER_END) ? |
Vanger | 0:b86d15c6ba29 | 2581 | &session->cliExpected : &session->srvExpected; |
Vanger | 0:b86d15c6ba29 | 2582 | /* buffer is on receiving end */ |
Vanger | 0:b86d15c6ba29 | 2583 | word32* length = (session->flags.side == CYASSL_SERVER_END) ? |
Vanger | 0:b86d15c6ba29 | 2584 | &session->sslServer->buffers.inputBuffer.length : |
Vanger | 0:b86d15c6ba29 | 2585 | &session->sslClient->buffers.inputBuffer.length; |
Vanger | 0:b86d15c6ba29 | 2586 | byte* myBuffer = (session->flags.side == CYASSL_SERVER_END) ? |
Vanger | 0:b86d15c6ba29 | 2587 | session->sslServer->buffers.inputBuffer.buffer : |
Vanger | 0:b86d15c6ba29 | 2588 | session->sslClient->buffers.inputBuffer.buffer; |
Vanger | 0:b86d15c6ba29 | 2589 | word32 bufferSize = (session->flags.side == CYASSL_SERVER_END) ? |
Vanger | 0:b86d15c6ba29 | 2590 | session->sslServer->buffers.inputBuffer.bufferSize : |
Vanger | 0:b86d15c6ba29 | 2591 | session->sslClient->buffers.inputBuffer.bufferSize; |
Vanger | 0:b86d15c6ba29 | 2592 | SSL* ssl = (session->flags.side == CYASSL_SERVER_END) ? |
Vanger | 0:b86d15c6ba29 | 2593 | session->sslServer : session->sslClient; |
Vanger | 0:b86d15c6ba29 | 2594 | |
Vanger | 0:b86d15c6ba29 | 2595 | while (*front && ((*front)->begin == *expected) ) { |
Vanger | 0:b86d15c6ba29 | 2596 | word32 room = bufferSize - *length; |
Vanger | 0:b86d15c6ba29 | 2597 | word32 packetLen = (*front)->end - (*front)->begin + 1; |
Vanger | 0:b86d15c6ba29 | 2598 | |
Vanger | 0:b86d15c6ba29 | 2599 | if (packetLen > room && bufferSize < MAX_INPUT_SZ) { |
Vanger | 0:b86d15c6ba29 | 2600 | if (GrowInputBuffer(ssl, packetLen, *length) < 0) { |
Vanger | 0:b86d15c6ba29 | 2601 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2602 | return 0; |
Vanger | 0:b86d15c6ba29 | 2603 | } |
Vanger | 0:b86d15c6ba29 | 2604 | } |
Vanger | 0:b86d15c6ba29 | 2605 | |
Vanger | 0:b86d15c6ba29 | 2606 | if (packetLen <= room) { |
Vanger | 0:b86d15c6ba29 | 2607 | PacketBuffer* del = *front; |
Vanger | 0:b86d15c6ba29 | 2608 | |
Vanger | 0:b86d15c6ba29 | 2609 | XMEMCPY(&myBuffer[*length], (*front)->data, packetLen); |
Vanger | 0:b86d15c6ba29 | 2610 | *length += packetLen; |
Vanger | 0:b86d15c6ba29 | 2611 | *expected += packetLen; |
Vanger | 0:b86d15c6ba29 | 2612 | |
Vanger | 0:b86d15c6ba29 | 2613 | /* remove used packet */ |
Vanger | 0:b86d15c6ba29 | 2614 | *front = (*front)->next; |
Vanger | 0:b86d15c6ba29 | 2615 | FreePacketBuffer(del); |
Vanger | 0:b86d15c6ba29 | 2616 | |
Vanger | 0:b86d15c6ba29 | 2617 | moreInput = 1; |
Vanger | 0:b86d15c6ba29 | 2618 | } |
Vanger | 0:b86d15c6ba29 | 2619 | else |
Vanger | 0:b86d15c6ba29 | 2620 | break; |
Vanger | 0:b86d15c6ba29 | 2621 | } |
Vanger | 0:b86d15c6ba29 | 2622 | if (moreInput) { |
Vanger | 0:b86d15c6ba29 | 2623 | *sslFrame = myBuffer; |
Vanger | 0:b86d15c6ba29 | 2624 | *sslBytes = *length; |
Vanger | 0:b86d15c6ba29 | 2625 | *end = myBuffer + *length; |
Vanger | 0:b86d15c6ba29 | 2626 | } |
Vanger | 0:b86d15c6ba29 | 2627 | return moreInput; |
Vanger | 0:b86d15c6ba29 | 2628 | } |
Vanger | 0:b86d15c6ba29 | 2629 | |
Vanger | 0:b86d15c6ba29 | 2630 | |
Vanger | 0:b86d15c6ba29 | 2631 | |
Vanger | 0:b86d15c6ba29 | 2632 | /* Process Message(s) from sslFrame */ |
Vanger | 0:b86d15c6ba29 | 2633 | /* return Number of bytes on success, 0 for no data yet, and -1 on error */ |
Vanger | 0:b86d15c6ba29 | 2634 | static int ProcessMessage(const byte* sslFrame, SnifferSession* session, |
Vanger | 0:b86d15c6ba29 | 2635 | int sslBytes, byte* data, const byte* end,char* error) |
Vanger | 0:b86d15c6ba29 | 2636 | { |
Vanger | 0:b86d15c6ba29 | 2637 | const byte* sslBegin = sslFrame; |
Vanger | 0:b86d15c6ba29 | 2638 | const byte* recordEnd; /* end of record indicator */ |
Vanger | 0:b86d15c6ba29 | 2639 | const byte* inRecordEnd; /* indictor from input stream not decrypt */ |
Vanger | 0:b86d15c6ba29 | 2640 | RecordLayerHeader rh; |
Vanger | 0:b86d15c6ba29 | 2641 | int rhSize = 0; |
Vanger | 0:b86d15c6ba29 | 2642 | int ret; |
Vanger | 0:b86d15c6ba29 | 2643 | int errCode = 0; |
Vanger | 0:b86d15c6ba29 | 2644 | int decoded = 0; /* bytes stored for user in data */ |
Vanger | 0:b86d15c6ba29 | 2645 | int notEnough; /* notEnough bytes yet flag */ |
Vanger | 0:b86d15c6ba29 | 2646 | int decrypted = 0; /* was current msg decrypted */ |
Vanger | 0:b86d15c6ba29 | 2647 | SSL* ssl = (session->flags.side == CYASSL_SERVER_END) ? |
Vanger | 0:b86d15c6ba29 | 2648 | session->sslServer : session->sslClient; |
Vanger | 0:b86d15c6ba29 | 2649 | doMessage: |
Vanger | 0:b86d15c6ba29 | 2650 | notEnough = 0; |
Vanger | 0:b86d15c6ba29 | 2651 | if (sslBytes < 0) { |
Vanger | 0:b86d15c6ba29 | 2652 | SetError(PACKET_HDR_SHORT_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2653 | return -1; |
Vanger | 0:b86d15c6ba29 | 2654 | } |
Vanger | 0:b86d15c6ba29 | 2655 | if (sslBytes >= RECORD_HEADER_SZ) { |
Vanger | 0:b86d15c6ba29 | 2656 | if (GetRecordHeader(sslFrame, &rh, &rhSize) != 0) { |
Vanger | 0:b86d15c6ba29 | 2657 | SetError(BAD_RECORD_HDR_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2658 | return -1; |
Vanger | 0:b86d15c6ba29 | 2659 | } |
Vanger | 0:b86d15c6ba29 | 2660 | } |
Vanger | 0:b86d15c6ba29 | 2661 | else |
Vanger | 0:b86d15c6ba29 | 2662 | notEnough = 1; |
Vanger | 0:b86d15c6ba29 | 2663 | |
Vanger | 0:b86d15c6ba29 | 2664 | if (notEnough || rhSize > (sslBytes - RECORD_HEADER_SZ)) { |
Vanger | 0:b86d15c6ba29 | 2665 | /* don't have enough input yet to process full SSL record */ |
Vanger | 0:b86d15c6ba29 | 2666 | Trace(PARTIAL_INPUT_STR); |
Vanger | 0:b86d15c6ba29 | 2667 | |
Vanger | 0:b86d15c6ba29 | 2668 | /* store partial if not there already or we advanced */ |
Vanger | 0:b86d15c6ba29 | 2669 | if (ssl->buffers.inputBuffer.length == 0 || sslBegin != sslFrame) { |
Vanger | 0:b86d15c6ba29 | 2670 | if (sslBytes > (int)ssl->buffers.inputBuffer.bufferSize) { |
Vanger | 0:b86d15c6ba29 | 2671 | if (GrowInputBuffer(ssl, sslBytes, 0) < 0) { |
Vanger | 0:b86d15c6ba29 | 2672 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2673 | return -1; |
Vanger | 0:b86d15c6ba29 | 2674 | } |
Vanger | 0:b86d15c6ba29 | 2675 | } |
Vanger | 0:b86d15c6ba29 | 2676 | XMEMCPY(ssl->buffers.inputBuffer.buffer, sslFrame, sslBytes); |
Vanger | 0:b86d15c6ba29 | 2677 | ssl->buffers.inputBuffer.length = sslBytes; |
Vanger | 0:b86d15c6ba29 | 2678 | } |
Vanger | 0:b86d15c6ba29 | 2679 | if (HaveMoreInput(session, &sslFrame, &sslBytes, &end, error)) |
Vanger | 0:b86d15c6ba29 | 2680 | goto doMessage; |
Vanger | 0:b86d15c6ba29 | 2681 | return decoded; |
Vanger | 0:b86d15c6ba29 | 2682 | } |
Vanger | 0:b86d15c6ba29 | 2683 | sslFrame += RECORD_HEADER_SZ; |
Vanger | 0:b86d15c6ba29 | 2684 | sslBytes -= RECORD_HEADER_SZ; |
Vanger | 0:b86d15c6ba29 | 2685 | recordEnd = sslFrame + rhSize; /* may have more than one record */ |
Vanger | 0:b86d15c6ba29 | 2686 | inRecordEnd = recordEnd; |
Vanger | 0:b86d15c6ba29 | 2687 | |
Vanger | 0:b86d15c6ba29 | 2688 | /* decrypt if needed */ |
Vanger | 0:b86d15c6ba29 | 2689 | if ((session->flags.side == CYASSL_SERVER_END && |
Vanger | 0:b86d15c6ba29 | 2690 | session->flags.serverCipherOn) |
Vanger | 0:b86d15c6ba29 | 2691 | || (session->flags.side == CYASSL_CLIENT_END && |
Vanger | 0:b86d15c6ba29 | 2692 | session->flags.clientCipherOn)) { |
Vanger | 0:b86d15c6ba29 | 2693 | int ivAdvance = 0; /* TLSv1.1 advance amount */ |
Vanger | 0:b86d15c6ba29 | 2694 | if (ssl->decrypt.setup != 1) { |
Vanger | 0:b86d15c6ba29 | 2695 | SetError(DECRYPT_KEYS_NOT_SETUP, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2696 | return -1; |
Vanger | 0:b86d15c6ba29 | 2697 | } |
Vanger | 0:b86d15c6ba29 | 2698 | if (CheckAvailableSize(ssl, rhSize) < 0) { |
Vanger | 0:b86d15c6ba29 | 2699 | SetError(MEMORY_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2700 | return -1; |
Vanger | 0:b86d15c6ba29 | 2701 | } |
Vanger | 0:b86d15c6ba29 | 2702 | sslFrame = DecryptMessage(ssl, sslFrame, rhSize, |
Vanger | 0:b86d15c6ba29 | 2703 | ssl->buffers.outputBuffer.buffer, &errCode, |
Vanger | 0:b86d15c6ba29 | 2704 | &ivAdvance); |
Vanger | 0:b86d15c6ba29 | 2705 | recordEnd = sslFrame - ivAdvance + rhSize; /* sslFrame moved so |
Vanger | 0:b86d15c6ba29 | 2706 | should recordEnd */ |
Vanger | 0:b86d15c6ba29 | 2707 | decrypted = 1; |
Vanger | 0:b86d15c6ba29 | 2708 | if (errCode != 0) { |
Vanger | 0:b86d15c6ba29 | 2709 | SetError(BAD_DECRYPT, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2710 | return -1; |
Vanger | 0:b86d15c6ba29 | 2711 | } |
Vanger | 0:b86d15c6ba29 | 2712 | } |
Vanger | 0:b86d15c6ba29 | 2713 | |
Vanger | 0:b86d15c6ba29 | 2714 | doPart: |
Vanger | 0:b86d15c6ba29 | 2715 | |
Vanger | 0:b86d15c6ba29 | 2716 | switch ((enum ContentType)rh.type) { |
Vanger | 0:b86d15c6ba29 | 2717 | case handshake: |
Vanger | 0:b86d15c6ba29 | 2718 | { |
Vanger | 0:b86d15c6ba29 | 2719 | int startIdx = sslBytes; |
Vanger | 0:b86d15c6ba29 | 2720 | int used; |
Vanger | 0:b86d15c6ba29 | 2721 | |
Vanger | 0:b86d15c6ba29 | 2722 | Trace(GOT_HANDSHAKE_STR); |
Vanger | 0:b86d15c6ba29 | 2723 | ret = DoHandShake(sslFrame, &sslBytes, session, error); |
Vanger | 0:b86d15c6ba29 | 2724 | if (ret != 0) { |
Vanger | 0:b86d15c6ba29 | 2725 | if (session->flags.fatalError == 0) |
Vanger | 0:b86d15c6ba29 | 2726 | SetError(BAD_HANDSHAKE_STR, error, session, |
Vanger | 0:b86d15c6ba29 | 2727 | FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2728 | return -1; |
Vanger | 0:b86d15c6ba29 | 2729 | } |
Vanger | 0:b86d15c6ba29 | 2730 | |
Vanger | 0:b86d15c6ba29 | 2731 | /* DoHandShake now fully decrements sslBytes to remaining */ |
Vanger | 0:b86d15c6ba29 | 2732 | used = startIdx - sslBytes; |
Vanger | 0:b86d15c6ba29 | 2733 | sslFrame += used; |
Vanger | 0:b86d15c6ba29 | 2734 | if (decrypted) |
Vanger | 0:b86d15c6ba29 | 2735 | sslFrame += ssl->keys.padSz; |
Vanger | 0:b86d15c6ba29 | 2736 | } |
Vanger | 0:b86d15c6ba29 | 2737 | break; |
Vanger | 0:b86d15c6ba29 | 2738 | case change_cipher_spec: |
Vanger | 0:b86d15c6ba29 | 2739 | if (session->flags.side == CYASSL_SERVER_END) |
Vanger | 0:b86d15c6ba29 | 2740 | session->flags.serverCipherOn = 1; |
Vanger | 0:b86d15c6ba29 | 2741 | else |
Vanger | 0:b86d15c6ba29 | 2742 | session->flags.clientCipherOn = 1; |
Vanger | 0:b86d15c6ba29 | 2743 | Trace(GOT_CHANGE_CIPHER_STR); |
Vanger | 0:b86d15c6ba29 | 2744 | ssl->options.handShakeState = HANDSHAKE_DONE; |
Vanger | 0:b86d15c6ba29 | 2745 | ssl->options.handShakeDone = 1; |
Vanger | 0:b86d15c6ba29 | 2746 | |
Vanger | 0:b86d15c6ba29 | 2747 | sslFrame += 1; |
Vanger | 0:b86d15c6ba29 | 2748 | sslBytes -= 1; |
Vanger | 0:b86d15c6ba29 | 2749 | |
Vanger | 0:b86d15c6ba29 | 2750 | break; |
Vanger | 0:b86d15c6ba29 | 2751 | case application_data: |
Vanger | 0:b86d15c6ba29 | 2752 | Trace(GOT_APP_DATA_STR); |
Vanger | 0:b86d15c6ba29 | 2753 | { |
Vanger | 0:b86d15c6ba29 | 2754 | word32 inOutIdx = 0; |
Vanger | 0:b86d15c6ba29 | 2755 | |
Vanger | 0:b86d15c6ba29 | 2756 | ret = DoApplicationData(ssl, (byte*)sslFrame, &inOutIdx); |
Vanger | 0:b86d15c6ba29 | 2757 | if (ret == 0) { |
Vanger | 0:b86d15c6ba29 | 2758 | ret = ssl->buffers.clearOutputBuffer.length; |
Vanger | 0:b86d15c6ba29 | 2759 | TraceGotData(ret); |
Vanger | 0:b86d15c6ba29 | 2760 | if (ret) { /* may be blank message */ |
Vanger | 0:b86d15c6ba29 | 2761 | XMEMCPY(&data[decoded], |
Vanger | 0:b86d15c6ba29 | 2762 | ssl->buffers.clearOutputBuffer.buffer, ret); |
Vanger | 0:b86d15c6ba29 | 2763 | TraceAddedData(ret, decoded); |
Vanger | 0:b86d15c6ba29 | 2764 | decoded += ret; |
Vanger | 0:b86d15c6ba29 | 2765 | ssl->buffers.clearOutputBuffer.length = 0; |
Vanger | 0:b86d15c6ba29 | 2766 | } |
Vanger | 0:b86d15c6ba29 | 2767 | } |
Vanger | 0:b86d15c6ba29 | 2768 | else { |
Vanger | 0:b86d15c6ba29 | 2769 | SetError(BAD_APP_DATA_STR, error,session,FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2770 | return -1; |
Vanger | 0:b86d15c6ba29 | 2771 | } |
Vanger | 0:b86d15c6ba29 | 2772 | if (ssl->buffers.outputBuffer.dynamicFlag) |
Vanger | 0:b86d15c6ba29 | 2773 | ShrinkOutputBuffer(ssl); |
Vanger | 0:b86d15c6ba29 | 2774 | |
Vanger | 0:b86d15c6ba29 | 2775 | sslFrame += inOutIdx; |
Vanger | 0:b86d15c6ba29 | 2776 | sslBytes -= inOutIdx; |
Vanger | 0:b86d15c6ba29 | 2777 | } |
Vanger | 0:b86d15c6ba29 | 2778 | break; |
Vanger | 0:b86d15c6ba29 | 2779 | case alert: |
Vanger | 0:b86d15c6ba29 | 2780 | Trace(GOT_ALERT_STR); |
Vanger | 0:b86d15c6ba29 | 2781 | sslFrame += rhSize; |
Vanger | 0:b86d15c6ba29 | 2782 | sslBytes -= rhSize; |
Vanger | 0:b86d15c6ba29 | 2783 | break; |
Vanger | 0:b86d15c6ba29 | 2784 | case no_type: |
Vanger | 0:b86d15c6ba29 | 2785 | default: |
Vanger | 0:b86d15c6ba29 | 2786 | SetError(GOT_UNKNOWN_RECORD_STR, error, session, FATAL_ERROR_STATE); |
Vanger | 0:b86d15c6ba29 | 2787 | return -1; |
Vanger | 0:b86d15c6ba29 | 2788 | } |
Vanger | 0:b86d15c6ba29 | 2789 | |
Vanger | 0:b86d15c6ba29 | 2790 | /* do we have another msg in record ? */ |
Vanger | 0:b86d15c6ba29 | 2791 | if (sslFrame < recordEnd) { |
Vanger | 0:b86d15c6ba29 | 2792 | Trace(ANOTHER_MSG_STR); |
Vanger | 0:b86d15c6ba29 | 2793 | goto doPart; |
Vanger | 0:b86d15c6ba29 | 2794 | } |
Vanger | 0:b86d15c6ba29 | 2795 | |
Vanger | 0:b86d15c6ba29 | 2796 | /* back to input stream instead of potential decrypt buffer */ |
Vanger | 0:b86d15c6ba29 | 2797 | recordEnd = inRecordEnd; |
Vanger | 0:b86d15c6ba29 | 2798 | |
Vanger | 0:b86d15c6ba29 | 2799 | /* do we have more records ? */ |
Vanger | 0:b86d15c6ba29 | 2800 | if (recordEnd < end) { |
Vanger | 0:b86d15c6ba29 | 2801 | Trace(ANOTHER_MSG_STR); |
Vanger | 0:b86d15c6ba29 | 2802 | sslFrame = recordEnd; |
Vanger | 0:b86d15c6ba29 | 2803 | sslBytes = (int)(end - recordEnd); |
Vanger | 0:b86d15c6ba29 | 2804 | goto doMessage; |
Vanger | 0:b86d15c6ba29 | 2805 | } |
Vanger | 0:b86d15c6ba29 | 2806 | |
Vanger | 0:b86d15c6ba29 | 2807 | /* clear used input */ |
Vanger | 0:b86d15c6ba29 | 2808 | ssl->buffers.inputBuffer.length = 0; |
Vanger | 0:b86d15c6ba29 | 2809 | |
Vanger | 0:b86d15c6ba29 | 2810 | /* could have more input ready now */ |
Vanger | 0:b86d15c6ba29 | 2811 | if (HaveMoreInput(session, &sslFrame, &sslBytes, &end, error)) |
Vanger | 0:b86d15c6ba29 | 2812 | goto doMessage; |
Vanger | 0:b86d15c6ba29 | 2813 | |
Vanger | 0:b86d15c6ba29 | 2814 | if (ssl->buffers.inputBuffer.dynamicFlag) |
Vanger | 0:b86d15c6ba29 | 2815 | ShrinkInputBuffer(ssl, NO_FORCED_FREE); |
Vanger | 0:b86d15c6ba29 | 2816 | |
Vanger | 0:b86d15c6ba29 | 2817 | return decoded; |
Vanger | 0:b86d15c6ba29 | 2818 | } |
Vanger | 0:b86d15c6ba29 | 2819 | |
Vanger | 0:b86d15c6ba29 | 2820 | |
Vanger | 0:b86d15c6ba29 | 2821 | /* See if we need to process any pending FIN captures */ |
Vanger | 0:b86d15c6ba29 | 2822 | static void CheckFinCapture(IpInfo* ipInfo, TcpInfo* tcpInfo, |
Vanger | 0:b86d15c6ba29 | 2823 | SnifferSession* session) |
Vanger | 0:b86d15c6ba29 | 2824 | { |
Vanger | 0:b86d15c6ba29 | 2825 | if (session->finCaputre.cliFinSeq && session->finCaputre.cliFinSeq <= |
Vanger | 0:b86d15c6ba29 | 2826 | session->cliExpected) { |
Vanger | 0:b86d15c6ba29 | 2827 | if (session->finCaputre.cliCounted == 0) { |
Vanger | 0:b86d15c6ba29 | 2828 | session->flags.finCount += 1; |
Vanger | 0:b86d15c6ba29 | 2829 | session->finCaputre.cliCounted = 1; |
Vanger | 0:b86d15c6ba29 | 2830 | TraceClientFin(session->finCaputre.cliFinSeq, session->cliExpected); |
Vanger | 0:b86d15c6ba29 | 2831 | } |
Vanger | 0:b86d15c6ba29 | 2832 | } |
Vanger | 0:b86d15c6ba29 | 2833 | |
Vanger | 0:b86d15c6ba29 | 2834 | if (session->finCaputre.srvFinSeq && session->finCaputre.srvFinSeq <= |
Vanger | 0:b86d15c6ba29 | 2835 | session->srvExpected) { |
Vanger | 0:b86d15c6ba29 | 2836 | if (session->finCaputre.srvCounted == 0) { |
Vanger | 0:b86d15c6ba29 | 2837 | session->flags.finCount += 1; |
Vanger | 0:b86d15c6ba29 | 2838 | session->finCaputre.srvCounted = 1; |
Vanger | 0:b86d15c6ba29 | 2839 | TraceServerFin(session->finCaputre.srvFinSeq, session->srvExpected); |
Vanger | 0:b86d15c6ba29 | 2840 | } |
Vanger | 0:b86d15c6ba29 | 2841 | } |
Vanger | 0:b86d15c6ba29 | 2842 | |
Vanger | 0:b86d15c6ba29 | 2843 | if (session->flags.finCount >= 2) |
Vanger | 0:b86d15c6ba29 | 2844 | RemoveSession(session, ipInfo, tcpInfo, 0); |
Vanger | 0:b86d15c6ba29 | 2845 | } |
Vanger | 0:b86d15c6ba29 | 2846 | |
Vanger | 0:b86d15c6ba29 | 2847 | |
Vanger | 0:b86d15c6ba29 | 2848 | /* If session is in fatal error state free resources now |
Vanger | 0:b86d15c6ba29 | 2849 | return true if removed, 0 otherwise */ |
Vanger | 0:b86d15c6ba29 | 2850 | static int RemoveFatalSession(IpInfo* ipInfo, TcpInfo* tcpInfo, |
Vanger | 0:b86d15c6ba29 | 2851 | SnifferSession* session, char* error) |
Vanger | 0:b86d15c6ba29 | 2852 | { |
Vanger | 0:b86d15c6ba29 | 2853 | if (session && session->flags.fatalError == FATAL_ERROR_STATE) { |
Vanger | 0:b86d15c6ba29 | 2854 | RemoveSession(session, ipInfo, tcpInfo, 0); |
Vanger | 0:b86d15c6ba29 | 2855 | SetError(FATAL_ERROR_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 2856 | return 1; |
Vanger | 0:b86d15c6ba29 | 2857 | } |
Vanger | 0:b86d15c6ba29 | 2858 | return 0; |
Vanger | 0:b86d15c6ba29 | 2859 | } |
Vanger | 0:b86d15c6ba29 | 2860 | |
Vanger | 0:b86d15c6ba29 | 2861 | |
Vanger | 0:b86d15c6ba29 | 2862 | /* Passes in an IP/TCP packet for decoding (ethernet/localhost frame) removed */ |
Vanger | 0:b86d15c6ba29 | 2863 | /* returns Number of bytes on success, 0 for no data yet, and -1 on error */ |
Vanger | 0:b86d15c6ba29 | 2864 | int ssl_DecodePacket(const byte* packet, int length, byte* data, char* error) |
Vanger | 0:b86d15c6ba29 | 2865 | { |
Vanger | 0:b86d15c6ba29 | 2866 | TcpInfo tcpInfo; |
Vanger | 0:b86d15c6ba29 | 2867 | IpInfo ipInfo; |
Vanger | 0:b86d15c6ba29 | 2868 | const byte* sslFrame; |
Vanger | 0:b86d15c6ba29 | 2869 | const byte* end = packet + length; |
Vanger | 0:b86d15c6ba29 | 2870 | int sslBytes; /* ssl bytes unconsumed */ |
Vanger | 0:b86d15c6ba29 | 2871 | int ret; |
Vanger | 0:b86d15c6ba29 | 2872 | SnifferSession* session = 0; |
Vanger | 0:b86d15c6ba29 | 2873 | |
Vanger | 0:b86d15c6ba29 | 2874 | if (CheckHeaders(&ipInfo, &tcpInfo, packet, length, &sslFrame, &sslBytes, |
Vanger | 0:b86d15c6ba29 | 2875 | error) != 0) |
Vanger | 0:b86d15c6ba29 | 2876 | return -1; |
Vanger | 0:b86d15c6ba29 | 2877 | |
Vanger | 0:b86d15c6ba29 | 2878 | ret = CheckSession(&ipInfo, &tcpInfo, sslBytes, &session, error); |
Vanger | 0:b86d15c6ba29 | 2879 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1; |
Vanger | 0:b86d15c6ba29 | 2880 | else if (ret == -1) return -1; |
Vanger | 0:b86d15c6ba29 | 2881 | else if (ret == 1) return 0; /* done for now */ |
Vanger | 0:b86d15c6ba29 | 2882 | |
Vanger | 0:b86d15c6ba29 | 2883 | ret = CheckSequence(&ipInfo, &tcpInfo, session, &sslBytes, &sslFrame,error); |
Vanger | 0:b86d15c6ba29 | 2884 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1; |
Vanger | 0:b86d15c6ba29 | 2885 | else if (ret == -1) return -1; |
Vanger | 0:b86d15c6ba29 | 2886 | else if (ret == 1) return 0; /* done for now */ |
Vanger | 0:b86d15c6ba29 | 2887 | |
Vanger | 0:b86d15c6ba29 | 2888 | ret = CheckPreRecord(&ipInfo, &tcpInfo, &sslFrame, &session, &sslBytes, |
Vanger | 0:b86d15c6ba29 | 2889 | &end, error); |
Vanger | 0:b86d15c6ba29 | 2890 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1; |
Vanger | 0:b86d15c6ba29 | 2891 | else if (ret == -1) return -1; |
Vanger | 0:b86d15c6ba29 | 2892 | else if (ret == 1) return 0; /* done for now */ |
Vanger | 0:b86d15c6ba29 | 2893 | |
Vanger | 0:b86d15c6ba29 | 2894 | ret = ProcessMessage(sslFrame, session, sslBytes, data, end, error); |
Vanger | 0:b86d15c6ba29 | 2895 | if (RemoveFatalSession(&ipInfo, &tcpInfo, session, error)) return -1; |
Vanger | 0:b86d15c6ba29 | 2896 | CheckFinCapture(&ipInfo, &tcpInfo, session); |
Vanger | 0:b86d15c6ba29 | 2897 | return ret; |
Vanger | 0:b86d15c6ba29 | 2898 | } |
Vanger | 0:b86d15c6ba29 | 2899 | |
Vanger | 0:b86d15c6ba29 | 2900 | |
Vanger | 0:b86d15c6ba29 | 2901 | /* Enables (if traceFile)/ Disables debug tracing */ |
Vanger | 0:b86d15c6ba29 | 2902 | /* returns 0 on success, -1 on error */ |
Vanger | 0:b86d15c6ba29 | 2903 | int ssl_Trace(const char* traceFile, char* error) |
Vanger | 0:b86d15c6ba29 | 2904 | { |
Vanger | 0:b86d15c6ba29 | 2905 | if (traceFile) { |
Vanger | 0:b86d15c6ba29 | 2906 | TraceFile = fopen(traceFile, "a"); |
Vanger | 0:b86d15c6ba29 | 2907 | if (!TraceFile) { |
Vanger | 0:b86d15c6ba29 | 2908 | SetError(BAD_TRACE_FILE_STR, error, NULL, 0); |
Vanger | 0:b86d15c6ba29 | 2909 | return -1; |
Vanger | 0:b86d15c6ba29 | 2910 | } |
Vanger | 0:b86d15c6ba29 | 2911 | TraceOn = 1; |
Vanger | 0:b86d15c6ba29 | 2912 | } |
Vanger | 0:b86d15c6ba29 | 2913 | else |
Vanger | 0:b86d15c6ba29 | 2914 | TraceOn = 0; |
Vanger | 0:b86d15c6ba29 | 2915 | |
Vanger | 0:b86d15c6ba29 | 2916 | return 0; |
Vanger | 0:b86d15c6ba29 | 2917 | } |
Vanger | 0:b86d15c6ba29 | 2918 | |
Vanger | 0:b86d15c6ba29 | 2919 | |
Vanger | 0:b86d15c6ba29 | 2920 | |
Vanger | 0:b86d15c6ba29 | 2921 | |
Vanger | 0:b86d15c6ba29 | 2922 | #endif /* CYASSL_SNIFFER */ |