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Comparing gvpe/src/global.h (file contents):
Revision 1.5 by pcg, Sat Mar 22 02:35:57 2003 UTC vs.
Revision 1.32 by root, Fri Jul 19 18:21:03 2013 UTC

1/* 1/*
2 global.h -- global variables and constants 2 global.h -- global variables and constants
3 Copyright (C) 2003-2013 Marc Lehmann <gvpe@schmorp.de>
3 4
5 This file is part of GVPE.
6
4 This program is free software; you can redistribute it and/or modify 7 GVPE is free software; you can redistribute it and/or modify it
5 it under the terms of the GNU General Public License as published by 8 under the terms of the GNU General Public License as published by the
6 the Free Software Foundation; either version 2 of the License, or 9 Free Software Foundation; either version 3 of the License, or (at your
7 (at your option) any later version. 10 option) any later version.
8 11
9 This program is distributed in the hope that it will be useful, 12 This program is distributed in the hope that it will be useful, but
10 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
12 GNU General Public License for more details. 15 Public License for more details.
13 16
14 You should have received a copy of the GNU General Public License 17 You should have received a copy of the GNU General Public License along
15 along with this program; if not, write to the Free Software 18 with this program; if not, see <http://www.gnu.org/licenses/>.
16 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 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.
17*/ 30*/
18 31
19#ifndef GLOBAL_H__ 32#ifndef GLOBAL_H__
20#define GLOBAL_H__ 33#define GLOBAL_H__
21 34
22#include "config.h" 35#include "config.h"
23 36
24#include <time.h> 37#include <time.h>
25 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
26 48
27#define RSA_KEYBITS 1280 // must be >= 1280 and divisible by 8 49#define KEY_BITS(cipher) keybits_ ## cipher
28#define RSA_KEYLEN ((RSA_KEYBITS) >> 3) 50#define KEY_SIZE(cipher) (KEY_BITS (cipher) >> 3)
29#define RSA_OVERHEAD (41 + 1) // well, no define for OAEP 51#define keybits_EVP_bf_cbc 128 // actually 32-448
52#define keybits_EVP_aes_128_cbc 128
53#define keybits_EVP_aes_192_cbc 192
54#define keybits_EVP_aes_256_cbc 256
30 55
31#define CHALLENGE_TTL 30 // challenge bytes timeout after n seconds 56#define BLOCK_BITS(cipher) blockbits_ ## cipher
57#define BLOCK_SIZE(cipher) (BLOCK_BITS (cipher) >> 3)
58#define blockbits_EVP_bf_cbc 64
59#define blockbits_EVP_aes_128_cbc 128
60#define blockbits_EVP_aes_192_cbc 128
61#define blockbits_EVP_aes_256_cbc 128
32 62
33#define CIPHER ENABLE_CIPHER () 63/* Protocol version. Different major versions are incompatible,
34#define CIPHER_KEYLEN (EVP_CIPHER_key_length (CIPHER)) 64 * different minor versions probably are compatible ;)
35#define DIGEST ENABLE_DIGEST () 65 */
36#define HMAC_KEYLEN (256 >> 3) // number of bits used for the HMAC key (also change CHG_HMAC_KEY)
37 66
38#define MAX_SEQNO 0xfffff000U 67#define PROTOCOL_MAJOR 1
68#define PROTOCOL_MINOR 0
39 69
40#define CHG_SEQNO 0 // where the seqno starts within the rsa challenge 70#define SERIAL_SIZE 16
41#define CHG_CIPHER_KEY 4 // where the key starts within the rsa challenge
42#define CHG_HMAC_KEY 86 // where the key starts within the rsa challenge (256 bits at the end!)
43 71
44// hdr seq len hmac MAC MAC 72#define SEED_SIZE 64 // how many octets to seed rng with
45#define VPE_OVERHEAD (4 + 4 + 4 + RAND_SIZE + HMACLENGTH - 6 - 6)
46#define UDP_OVERHEAD 40 // size of a (normal) ip + udp header
47#define ETH_OVERHEAD 14 // the size of an ethernet header
48#define MAXSIZE (MAX_MTU + VPE_OVERHEAD)// slightly too large, but who cares
49 73
50#define PKTCACHESIZE 4 // the size of the memory pool for packets 74#define RSA_OAEP_SIZE 41
51 75
52#define QUEUEDEPTH 16 // the number of packets that will be queued (should be low) 76#define HKDF_XTR_HASH EVP_sha512
77#define HKDF_PRF_HASH EVP_sha256
53 78
79#define HKDF_SALT 24 // how many bytes for the hkdf salt
80
81#define RSA_KEYLEN (RSABITS >> 3)
82
83#define AUTH_DIGEST ENABLE_AUTH
84#define AUTH_SIZE (HASH_SIZE (AUTH_DIGEST))
85#define AUTH_TTL 12 // challenge bytes timeout after n seconds of non-use
86
87#define CIPHER ENABLE_CIPHER
88#define CIPHER_KEYSIZE (KEY_SIZE (CIPHER))
89#define CIPHER_IKMSIZE (CIPHER_KEYSIZE * 3 / 2) // randomness in rsa challenge
90
91#define MAC_DIGEST ENABLE_HMAC
92#define MAC_KEYSIZE HASH_SIZE (ENABLE_HMAC) // number of bits used for the HMAC key
93#define MAC_IKMSIZE (MAC_KEYSIZE * 3 / 2) // randomness in rsa challenge
94
54#define WINDOWSIZE 512 // sliding window size 95#define WINDOWSIZE 512 // sliding window size
96#define MAX_SEQNO (0xfffffff0U - WINDOWSIZE * 8)
97
98// hdr seq len hmac MAC MAC
99#define VPE_OVERHEAD (4 + 4 + 4 + RAND_SIZE + HMACLENGTH - 6 - 6)
100#define IP_OVERHEAD 20 // size of a (normal) ip header
101#define GRE_OVERHEAD (IP_OVERHEAD + 4)
102#define ICMP_OVERHEAD (IP_OVERHEAD + 4)
103#define UDP_OVERHEAD (IP_OVERHEAD + 20) // size of a (normal) ip + udp header (wrong, but don't care)
104#define TCP_OVERHEAD (IP_OVERHEAD + 22) // size of a (normal) ip + tcp header + packetlength
105#define MAX_OVERHEAD UDP_OVERHEAD // the max. overhead of any protocol (ok, tcp doesn't count)
106#define ETH_OVERHEAD 14 // the size of an ethernet header
107#define MAXSIZE (MAX_MTU + VPE_OVERHEAD) // slightly too large, but who cares
108
109#define PKTCACHESIZE 16 // the size of the memory pool for packets
55 110
56extern char *confbase; // directory in which all config files are 111extern char *confbase; // directory in which all config files are
57extern char *thisnode; // config for current node (TODO: remove) 112extern char *thisnode; // config for current node (TODO: remove)
58extern char *pidfilename; // pid file location 113
114template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
115template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
116template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
117template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
118
119template<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; }
120
121template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
59 122
60#endif 123#endif
61 124

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