| 1 |
/* |
| 2 |
global.h -- global variables and constants |
| 3 |
Copyright (C) 2003-2013 Marc Lehmann <gvpe@schmorp.de> |
| 4 |
|
| 5 |
This file is part of GVPE. |
| 6 |
|
| 7 |
GVPE is free software; you can redistribute it and/or modify it |
| 8 |
under the terms of the GNU General Public License as published by the |
| 9 |
Free Software Foundation; either version 3 of the License, or (at your |
| 10 |
option) any later version. |
| 11 |
|
| 12 |
This program is distributed in the hope that it will be useful, but |
| 13 |
WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
| 15 |
Public License for more details. |
| 16 |
|
| 17 |
You should have received a copy of the GNU General Public License along |
| 18 |
with this program; if not, see <http://www.gnu.org/licenses/>. |
| 19 |
|
| 20 |
Additional permission under GNU GPL version 3 section 7 |
| 21 |
|
| 22 |
If you modify this Program, or any covered work, by linking or |
| 23 |
combining it with the OpenSSL project's OpenSSL library (or a modified |
| 24 |
version of that library), containing parts covered by the terms of the |
| 25 |
OpenSSL or SSLeay licenses, the licensors of this Program grant you |
| 26 |
additional permission to convey the resulting work. Corresponding |
| 27 |
Source for a non-source form of such a combination shall include the |
| 28 |
source code for the parts of OpenSSL used as well as that of the |
| 29 |
covered work. |
| 30 |
*/ |
| 31 |
|
| 32 |
#ifndef GLOBAL_H__ |
| 33 |
#define GLOBAL_H__ |
| 34 |
|
| 35 |
#include "config.h" |
| 36 |
|
| 37 |
#include <time.h> |
| 38 |
|
| 39 |
#define HASH_BITS(hash) hashbits_ ## hash |
| 40 |
#define HASH_SIZE(hash) (HASH_BITS (hash) >> 3) |
| 41 |
#define hashbits_EVP_ripemd160 160 |
| 42 |
#define hashbits_EVP_sha1 160 |
| 43 |
#define hashbits_EVP_sha224 224 |
| 44 |
#define hashbits_EVP_sha256 256 |
| 45 |
#define hashbits_EVP_sha384 384 |
| 46 |
#define hashbits_EVP_sha512 512 |
| 47 |
#define hashbits_EVP_whirlpool 512 |
| 48 |
|
| 49 |
#define KEY_BITS(cipher) keybits_ ## cipher |
| 50 |
#define KEY_SIZE(cipher) (KEY_BITS (cipher) >> 3) |
| 51 |
//#define keybits_EVP_bf_ctr 128 // actually 32-448 |
| 52 |
#define keybits_EVP_aes_128_ctr 128 |
| 53 |
#define keybits_EVP_aes_192_ctr 192 |
| 54 |
#define keybits_EVP_aes_256_ctr 256 |
| 55 |
|
| 56 |
#define BLOCK_BITS(cipher) blockbits_ ## cipher |
| 57 |
#define BLOCK_SIZE(cipher) (BLOCK_BITS (cipher) >> 3) |
| 58 |
//#define blockbits_EVP_bf_ctr 64 |
| 59 |
#define blockbits_EVP_aes_128_ctr 8 |
| 60 |
#define blockbits_EVP_aes_192_ctr 8 |
| 61 |
#define blockbits_EVP_aes_256_ctr 8 |
| 62 |
|
| 63 |
#define IV_BITS(cipher) ivbits_ ## cipher |
| 64 |
#define IV_SIZE(cipher) (IV_BITS (cipher) >> 3) |
| 65 |
//#define ivbits_EVP_bf_ctr 64 |
| 66 |
#define ivbits_EVP_aes_128_ctr 128 |
| 67 |
#define ivbits_EVP_aes_192_ctr 128 |
| 68 |
#define ivbits_EVP_aes_256_ctr 128 |
| 69 |
|
| 70 |
/* Protocol version. Different major versions are incompatible, |
| 71 |
* different minor versions probably are compatible ;) |
| 72 |
*/ |
| 73 |
|
| 74 |
#define PROTOCOL_MAJOR 1 |
| 75 |
#define PROTOCOL_MINOR 0 |
| 76 |
|
| 77 |
#define SERIAL_SIZE 16 |
| 78 |
|
| 79 |
#define SEED_SIZE 64 // how many octets to seed rng with |
| 80 |
|
| 81 |
#define RSA_OAEP_SIZE 41 |
| 82 |
|
| 83 |
#define HKDF_XTR_HASH EVP_sha512 |
| 84 |
#define HKDF_PRF_HASH EVP_sha256 |
| 85 |
|
| 86 |
#define HKDF_SALT 24 // how many bytes for the hkdf salt |
| 87 |
|
| 88 |
#define RSA_KEYLEN (RSABITS >> 3) |
| 89 |
|
| 90 |
#define AUTH_DIGEST ENABLE_AUTH |
| 91 |
#define AUTH_SIZE (HASH_SIZE (AUTH_DIGEST)) |
| 92 |
#define AUTH_TTL 12 // challenge bytes timeout after n seconds of non-use |
| 93 |
|
| 94 |
#define CIPHER ENABLE_CIPHER |
| 95 |
#define CIPHER_KEYSIZE (KEY_SIZE (CIPHER)) |
| 96 |
#define CIPHER_IKMSIZE (CIPHER_KEYSIZE * 3 / 2) // randomness in rsa challenge |
| 97 |
|
| 98 |
#define MAC_DIGEST ENABLE_HMAC |
| 99 |
#define MAC_KEYSIZE HASH_SIZE (ENABLE_HMAC) // number of bits used for the HMAC key |
| 100 |
#define MAC_IKMSIZE (MAC_KEYSIZE * 3 / 2) // randomness in rsa challenge |
| 101 |
|
| 102 |
#define WINDOWSIZE 65536 // sliding window size |
| 103 |
#define MAX_SEQNO (0xfffffff0U - WINDOWSIZE * 8) |
| 104 |
|
| 105 |
// hdr seq len hmac MAC MAC |
| 106 |
#define VPE_OVERHEAD (4 + 4 + 4 + HMACLENGTH - 6 - 6) |
| 107 |
#define IP_OVERHEAD 20 // size of a (normal) ip header |
| 108 |
#define GRE_OVERHEAD (IP_OVERHEAD + 4) |
| 109 |
#define ICMP_OVERHEAD (IP_OVERHEAD + 4) |
| 110 |
#define UDP_OVERHEAD (IP_OVERHEAD + 20) // size of a (normal) ip + udp header (wrong, but don't care) |
| 111 |
#define TCP_OVERHEAD (IP_OVERHEAD + 22) // size of a (normal) ip + tcp header + packetlength |
| 112 |
#define MAX_OVERHEAD UDP_OVERHEAD // the max. overhead of any protocol (ok, tcp doesn't count) |
| 113 |
#define ETH_OVERHEAD 14 // the size of an ethernet header |
| 114 |
#define MAXSIZE (MAX_MTU + IP_OVERHEAD) // slightly too large, but who cares |
| 115 |
|
| 116 |
#define PKTCACHESIZE 128 // the size of the memory pool for packets |
| 117 |
|
| 118 |
extern char *confbase; // directory in which all config files are |
| 119 |
extern char *thisnode; // config for current node (TODO: remove) |
| 120 |
|
| 121 |
template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
| 122 |
template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
| 123 |
template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
| 124 |
template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
| 125 |
|
| 126 |
template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; } |
| 127 |
|
| 128 |
template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
| 129 |
|
| 130 |
#endif |
| 131 |
|
