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Comparing gvpe/src/global.h (file contents):
Revision 1.18 by pcg, Fri Apr 2 14:42:45 2004 UTC vs.
Revision 1.31 by root, Fri Jul 19 18:18:27 2013 UTC

1/* 1/*
2 global.h -- global variables and constants 2 global.h -- global variables and constants
3 Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com> 3 Copyright (C) 2003-2013 Marc Lehmann <gvpe@schmorp.de>
4 4
5 This file is part of GVPE.
6
5 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
6 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
7 the Free Software Foundation; either version 2 of the License, or 9 Free Software Foundation; either version 3 of the License, or (at your
8 (at your option) any later version. 10 option) any later version.
9 11
10 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
11 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
13 GNU General Public License for more details. 15 Public License for more details.
14 16
15 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
16 along with this program; if not, write to the Free Software 18 with this program; if not, see <http://www.gnu.org/licenses/>.
17 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.
18*/ 30*/
19 31
20#ifndef GLOBAL_H__ 32#ifndef GLOBAL_H__
21#define GLOBAL_H__ 33#define GLOBAL_H__
22 34
23#include "config.h" 35#include "config.h"
24 36
25#include <time.h> 37#include <time.h>
26 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_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
55
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
62
27/* Protocol version. Different major versions are incompatible, 63/* Protocol version. Different major versions are incompatible,
28 * different minor versions probably are compatible ;) 64 * different minor versions probably are compatible ;)
29 */ 65 */
30 66
31#define PROTOCOL_MAJOR 0 67#define PROTOCOL_MAJOR 1
32#define PROTOCOL_MINOR 1 68#define PROTOCOL_MINOR 0
33 69
34#define RSA_KEYBITS 1280 // must be >= 1280 and divisible by 8 70#define SERIAL_SIZE 16
35#define RSA_KEYLEN ((RSA_KEYBITS) >> 3)
36#define RSA_OVERHEAD (41 + 1) // well, no define for OAEP in openssl
37 71
38#define RSA_HASH EVP_ripemd160 ()// speed don't matter, boy, safety does.. I need sha256 :( 72#define SEED_SIZE 64 // how many octets to seed rng with
39#define RSA_HASHLEN (160 >> 3)
40#define RSA_RESLEN RSA_HASHLEN
41 73
42#define RSA_IDLEN 16 // how many bytes are used to identify the challenge 74#define RSA_OAEP_SIZE 41
43#define RSA_TTL 120 // challenge bytes timeout after n seconds
44 75
45#define CIPHER ENABLE_CIPHER () 76#define HKDF_XTR_HASH EVP_sha512
46#define CIPHER_KEYLEN (EVP_CIPHER_key_length (CIPHER)) 77#define HKDF_PRF_HASH EVP_sha256
47#define DIGEST ENABLE_DIGEST ()
48#define HMAC_KEYLEN (256 >> 3) // number of bits used for the HMAC key (also change CHG_HMAC_KEY)
49 78
50#define MAX_SEQNO 0xfffffff0U 79#define HKDF_SALT 32 // how many bytes for the hkdf salt
51 80
52#define CHG_SEQNO 0 // where the seqno starts within the rsa challenge 81#define RSA_KEYLEN (RSABITS >> 3)
53#define CHG_CIPHER_KEY 4 // where the key starts within the rsa challenge
54#define CHG_HMAC_KEY 86 // where the key starts within the rsa challenge (256 bits at the end!)
55 82
56// hdr seq len hmac MAC MAC 83#define AUTH_DIGEST ENABLE_AUTH
57#define VPE_OVERHEAD (4 + 4 + 4 + RAND_SIZE + HMACLENGTH - 6 - 6) 84#define AUTH_SIZE (HASH_SIZE (AUTH_DIGEST))
58#define IP_OVERHEAD 20 // size of a (normal) ip header 85#define AUTH_TTL 12 // challenge bytes timeout after n seconds of non-use
59#define GRE_OVERHEAD (IP_OVERHEAD + 4)
60#define ICMP_OVERHEAD (IP_OVERHEAD + 4)
61#define UDP_OVERHEAD (IP_OVERHEAD + 20) // size of a (normal) ip + udp header (wrong, but don't care)
62#define TCP_OVERHEAD (IP_OVERHEAD + 22) // size of a (normal) ip + tcp header + packetlength
63#define MAX_OVERHEAD UDP_OVERHEAD // the max. overhead of any protocol (ok, tcp doesn't count)
64#define ETH_OVERHEAD 14 // the size of an ethernet header
65#define MAXSIZE (MAX_MTU + VPE_OVERHEAD)// slightly too large, but who cares
66 86
67#define PKTCACHESIZE 5 // the size of the memory pool for packets 87#define CIPHER ENABLE_CIPHER
88#define CIPHER_KEYSIZE (KEY_SIZE (CIPHER))
89#define CIPHER_IKMSIZE CIPHER_KEYSIZE * 2 // randomness in rsa challenge
68 90
69#define QUEUEDEPTH 16 // the number of packets that will be queued (should be low) 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 * 2 // randomness in rsa challenge
70 94
71#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
72 110
73extern char *confbase; // directory in which all config files are 111extern char *confbase; // directory in which all config files are
74extern char *thisnode; // config for current node (TODO: remove) 112extern char *thisnode; // config for current node (TODO: remove)
75 113
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; }
122
76#endif 123#endif
77 124

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