gvpe/src/global.h

/*
    global.h -- global variables and constants
    Copyright (C) 2003-2013 Marc Lehmann <gvpe@schmorp.de>
 
    This file is part of GVPE.

    GVPE is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the
    Free Software Foundation; either version 3 of the License, or (at your
    option) any later version.
   
    This program is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
    Public License for more details.
   
    You should have received a copy of the GNU General Public License along
    with this program; if not, see <http://www.gnu.org/licenses/>.
   
    Additional permission under GNU GPL version 3 section 7
   
    If you modify this Program, or any covered work, by linking or
    combining it with the OpenSSL project's OpenSSL library (or a modified
    version of that library), containing parts covered by the terms of the
    OpenSSL or SSLeay licenses, the licensors of this Program grant you
    additional permission to convey the resulting work.  Corresponding
    Source for a non-source form of such a combination shall include the
    source code for the parts of OpenSSL used as well as that of the
    covered work.
*/

#ifndef GLOBAL_H__
#define GLOBAL_H__

#include "config.h"

#include <time.h>

#define HASH_BITS(hash) hashbits_ ## hash
#define HASH_SIZE(hash) (HASH_BITS (hash) >> 3)
#define hashbits_EVP_ripemd160    160
#define hashbits_EVP_sha1         160
#define hashbits_EVP_sha224       224
#define hashbits_EVP_sha256       256
#define hashbits_EVP_sha384       384
#define hashbits_EVP_sha512       512
#define hashbits_EVP_whirlpool    512

#define KEY_BITS(cipher) keybits_ ## cipher
#define KEY_SIZE(cipher) (KEY_BITS (cipher) >> 3)
#define keybits_EVP_bf_cbc        128 // actually 32-448
#define keybits_EVP_aes_128_cbc   128
#define keybits_EVP_aes_192_cbc   192
#define keybits_EVP_aes_256_cbc   256

#define BLOCK_BITS(cipher) blockbits_ ## cipher
#define BLOCK_SIZE(cipher) (BLOCK_BITS (cipher) >> 3)
#define blockbits_EVP_bf_cbc       64
#define blockbits_EVP_aes_128_cbc 128
#define blockbits_EVP_aes_192_cbc 128
#define blockbits_EVP_aes_256_cbc 128

/* Protocol version. Different major versions are incompatible,
 * different minor versions probably are compatible ;)
 */

#define PROTOCOL_MAJOR 1
#define PROTOCOL_MINOR 0

#define SERIAL_SIZE     16

#define SEED_SIZE       64 // how many octets to seed rng with

#define RSA_OAEP_SIZE   41

#define HKDF_XTR_HASH   EVP_sha512
#define HKDF_PRF_HASH   EVP_sha256

#define HKDF_SALT       24 // how many bytes for the hkdf salt

#define RSA_KEYLEN      (RSABITS >> 3)

#define AUTH_DIGEST     ENABLE_AUTH
#define AUTH_SIZE       (HASH_SIZE (AUTH_DIGEST))
#define AUTH_TTL        12              // challenge bytes timeout after n seconds of non-use

#define CIPHER          ENABLE_CIPHER
#define CIPHER_KEYSIZE  (KEY_SIZE (CIPHER))
#define CIPHER_IKMSIZE  (CIPHER_KEYSIZE * 3 / 2) // randomness in rsa challenge

#define MAC_DIGEST      ENABLE_HMAC
#define MAC_KEYSIZE     HASH_SIZE (ENABLE_HMAC) // number of bits used for the HMAC key
#define MAC_IKMSIZE     (MAC_KEYSIZE    * 3 / 2) // randomness in rsa challenge

#define WINDOWSIZE      512             // sliding window size
#define MAX_SEQNO       (0xfffffff0U - WINDOWSIZE * 8)

//                    hdr seq len              hmac        MAC MAC
#define VPE_OVERHEAD  (4 + 4 + 4 + RAND_SIZE + HMACLENGTH - 6 - 6)
#define IP_OVERHEAD   20                        // size of a (normal) ip header
#define GRE_OVERHEAD  (IP_OVERHEAD +  4)
#define ICMP_OVERHEAD (IP_OVERHEAD +  4)
#define UDP_OVERHEAD  (IP_OVERHEAD + 20)        // size of a (normal) ip + udp header (wrong, but don't care)
#define TCP_OVERHEAD  (IP_OVERHEAD + 22)        // size of a (normal) ip + tcp header + packetlength
#define MAX_OVERHEAD  UDP_OVERHEAD              // the max. overhead of any protocol (ok, tcp doesn't count)
#define ETH_OVERHEAD  14                        // the size of an ethernet header
#define MAXSIZE       (MAX_MTU + VPE_OVERHEAD)  // slightly too large, but who cares

#define PKTCACHESIZE    16      // the size of the memory pool for packets

extern char *confbase;          // directory in which all config files are
extern char *thisnode;          // config for current node (TODO: remove)

template<typename T, typename U> static inline T    min    (T  a, U b) { return a < (T)b ? a : (T)b; }
template<typename T, typename U> static inline void min_it (T &a, U b) {    a = a < (T)b ? a : (T)b; }
template<typename T, typename U> static inline T    max    (T  a, U b) { return a > (T)b ? a : (T)b; }
template<typename T, typename U> static inline void max_it (T &a, U b) {    a = a > (T)b ? a : (T)b; }

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; }

template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }

#endif

Revision:	1.32
Committed:	Fri Jul 19 18:21:03 2013 UTC (10 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.31:	+3 -3 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.1	/*
2			global.h -- global variables and constants
3	root	1.26	Copyright (C) 2003-2013 Marc Lehmann <gvpe@schmorp.de>
4	pcg	1.1
5	pcg	1.19	This file is part of GVPE.
6
7	pcg	1.24	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	pcg	1.1	*/
31
32			#ifndef GLOBAL_H__
33			#define GLOBAL_H__
34
35			#include "config.h"
36
37			#include <time.h>
38
39	root	1.27	#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
63	pcg	1.8	/* Protocol version. Different major versions are incompatible,
64			* different minor versions probably are compatible ;)
65			*/
66
67	root	1.27	#define PROTOCOL_MAJOR 1
68			#define PROTOCOL_MINOR 0
69	pcg	1.1
70	root	1.30	#define SERIAL_SIZE 16
71
72	root	1.26	#define SEED_SIZE 64 // how many octets to seed rng with
73
74	root	1.31	#define RSA_OAEP_SIZE 41
75
76	root	1.28	#define HKDF_XTR_HASH EVP_sha512
77			#define HKDF_PRF_HASH EVP_sha256
78
79	root	1.32	#define HKDF_SALT 24 // how many bytes for the hkdf salt
80	root	1.27
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	root	1.32	#define CIPHER_IKMSIZE (CIPHER_KEYSIZE * 3 / 2) // randomness in rsa challenge
90	root	1.27
91	root	1.29	#define MAC_DIGEST ENABLE_HMAC
92			#define MAC_KEYSIZE HASH_SIZE (ENABLE_HMAC) // number of bits used for the HMAC key
93	root	1.32	#define MAC_IKMSIZE (MAC_KEYSIZE * 3 / 2) // randomness in rsa challenge
94	pcg	1.1
95	pcg	1.22	#define WINDOWSIZE 512 // sliding window size
96	pcg	1.21	#define MAX_SEQNO (0xfffffff0U - WINDOWSIZE * 8)
97	pcg	1.1
98	pcg	1.22	// 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	pcg	1.1
109	pcg	1.23	#define PKTCACHESIZE 16 // the size of the memory pool for packets
110	pcg	1.2
111	pcg	1.1	extern char *confbase; // directory in which all config files are
112			extern char *thisnode; // config for current node (TODO: remove)
113
114	root	1.25	template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
115			template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
116			template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
117			template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
118
119			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; }
120
121			template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
122
123	pcg	1.1	#endif
124