1 | /* |
1 | /* |
2 | global.h -- global variables and constants |
2 | global.h -- global variables and constants |
3 | Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de> |
3 | Copyright (C) 2003-2013 Marc Lehmann <gvpe@schmorp.de> |
4 | |
4 | |
5 | This file is part of GVPE. |
5 | This file is part of GVPE. |
6 | |
6 | |
7 | GVPE is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify it |
8 | 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 |
9 | the Free Software Foundation; either version 2 of the License, or |
9 | Free Software Foundation; either version 3 of the License, or (at your |
10 | (at your option) any later version. |
10 | option) any later version. |
11 | |
11 | |
12 | 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 |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
15 | GNU General Public License for more details. |
15 | Public License for more details. |
16 | |
16 | |
17 | 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 |
18 | along with gvpe; if not, write to the Free Software |
18 | with this program; if not, see <http://www.gnu.org/licenses/>. |
19 | Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
19 | |
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20 | Additional permission under GNU GPL version 3 section 7 |
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21 | |
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22 | If you modify this Program, or any covered work, by linking or |
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23 | combining it with the OpenSSL project's OpenSSL library (or a modified |
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24 | version of that library), containing parts covered by the terms of the |
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25 | OpenSSL or SSLeay licenses, the licensors of this Program grant you |
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26 | additional permission to convey the resulting work. Corresponding |
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27 | Source for a non-source form of such a combination shall include the |
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28 | source code for the parts of OpenSSL used as well as that of the |
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29 | covered work. |
20 | */ |
30 | */ |
21 | |
31 | |
22 | #ifndef GLOBAL_H__ |
32 | #ifndef GLOBAL_H__ |
23 | #define GLOBAL_H__ |
33 | #define GLOBAL_H__ |
24 | |
34 | |
25 | #include "config.h" |
35 | #include "config.h" |
26 | |
36 | |
27 | #include <time.h> |
37 | #include <time.h> |
28 | |
38 | |
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39 | #define HASH_BITS(hash) hashbits_ ## hash |
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40 | #define HASH_SIZE(hash) (HASH_BITS (hash) >> 3) |
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41 | #define hashbits_EVP_ripemd160 160 |
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42 | #define hashbits_EVP_sha1 160 |
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43 | #define hashbits_EVP_sha224 224 |
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44 | #define hashbits_EVP_sha256 256 |
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45 | #define hashbits_EVP_sha384 384 |
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46 | #define hashbits_EVP_sha512 512 |
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47 | #define hashbits_EVP_whirlpool 512 |
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48 | |
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49 | #define KEY_BITS(cipher) keybits_ ## cipher |
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50 | #define KEY_SIZE(cipher) (KEY_BITS (cipher) >> 3) |
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51 | #define keybits_EVP_bf_cbc 128 // actually 32-448 |
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52 | #define keybits_EVP_aes_128_cbc 128 |
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53 | #define keybits_EVP_aes_192_cbc 192 |
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54 | #define keybits_EVP_aes_256_cbc 256 |
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55 | |
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56 | #define BLOCK_BITS(cipher) blockbits_ ## cipher |
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57 | #define BLOCK_SIZE(cipher) (BLOCK_BITS (cipher) >> 3) |
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58 | #define blockbits_EVP_bf_cbc 64 |
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59 | #define blockbits_EVP_aes_128_cbc 128 |
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60 | #define blockbits_EVP_aes_192_cbc 128 |
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61 | #define blockbits_EVP_aes_256_cbc 128 |
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62 | |
29 | /* Protocol version. Different major versions are incompatible, |
63 | /* Protocol version. Different major versions are incompatible, |
30 | * different minor versions probably are compatible ;) |
64 | * different minor versions probably are compatible ;) |
31 | */ |
65 | */ |
32 | |
66 | |
33 | #define PROTOCOL_MAJOR 0 |
67 | #define PROTOCOL_MAJOR 1 |
34 | #define PROTOCOL_MINOR 1 |
68 | #define PROTOCOL_MINOR 0 |
35 | |
69 | |
36 | #define RSA_KEYBITS 1280 // must be >= 1280 and divisible by 8 |
70 | #define SEED_SIZE 64 // how many octets to seed rng with |
37 | #define RSA_KEYLEN ((RSA_KEYBITS) >> 3) |
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38 | #define RSA_OVERHEAD (41 + 1) // well, no define for OAEP in openssl |
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39 | |
71 | |
40 | #define RSA_HASH EVP_ripemd160 ()// speed don't matter, boy, safety does.. I need sha256 :( |
72 | #define HKDF_XTR_HASH EVP_sha512 |
41 | #define RSA_HASHLEN (160 >> 3) |
73 | #define HKDF_PRF_HASH EVP_sha256 |
42 | #define RSA_RESLEN RSA_HASHLEN |
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43 | |
74 | |
44 | #define RSA_IDLEN 16 // how many bytes are used to identify the challenge |
75 | #define HKDF_SALT 32 |
45 | #define RSA_TTL 120 // challenge bytes timeout after n seconds |
76 | #define IKM_SIZE 32 |
46 | |
77 | |
47 | #define CIPHER ENABLE_CIPHER () |
78 | #define RSA_KEYLEN (RSABITS >> 3) |
48 | #define CIPHER_KEYLEN (EVP_CIPHER_key_length (CIPHER)) |
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49 | #define DIGEST ENABLE_DIGEST () |
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50 | #define HMAC_KEYLEN (256 >> 3) // number of bits used for the HMAC key (also change CHG_HMAC_KEY) |
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51 | |
79 | |
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80 | #define AUTH_DIGEST ENABLE_AUTH |
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81 | #define AUTH_SIZE (HASH_SIZE (AUTH_DIGEST)) |
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82 | #define AUTH_TTL 12 // challenge bytes timeout after n seconds of non-use |
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83 | |
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84 | #define CIPHER ENABLE_CIPHER |
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85 | #define CIPHER_KEYSIZE (KEY_SIZE (CIPHER)) |
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86 | |
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87 | #define MAC_DIGEST ENABLE_DIGEST |
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88 | #define MAC_KEYSIZE HASH_SIZE (ENABLE_DIGEST) // number of bits used for the HMAC key |
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89 | |
52 | #define WINDOWSIZE 512 // sliding window size |
90 | #define WINDOWSIZE 512 // sliding window size |
53 | #define MAX_SEQNO (0xfffffff0U - WINDOWSIZE * 8) |
91 | #define MAX_SEQNO (0xfffffff0U - WINDOWSIZE * 8) |
54 | |
92 | |
55 | #define CHG_SEQNO 0 // where the seqno starts within the rsa challenge |
93 | // hdr seq len hmac MAC MAC |
56 | #define CHG_CIPHER_KEY 4 // where the key starts within the rsa challenge |
94 | #define VPE_OVERHEAD (4 + 4 + 4 + RAND_SIZE + HMACLENGTH - 6 - 6) |
57 | #define CHG_HMAC_KEY 86 // where the key starts within the rsa challenge (256 bits at the end!) |
95 | #define IP_OVERHEAD 20 // size of a (normal) ip header |
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96 | #define GRE_OVERHEAD (IP_OVERHEAD + 4) |
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97 | #define ICMP_OVERHEAD (IP_OVERHEAD + 4) |
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98 | #define UDP_OVERHEAD (IP_OVERHEAD + 20) // size of a (normal) ip + udp header (wrong, but don't care) |
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99 | #define TCP_OVERHEAD (IP_OVERHEAD + 22) // size of a (normal) ip + tcp header + packetlength |
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100 | #define MAX_OVERHEAD UDP_OVERHEAD // the max. overhead of any protocol (ok, tcp doesn't count) |
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101 | #define ETH_OVERHEAD 14 // the size of an ethernet header |
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102 | #define MAXSIZE (MAX_MTU + VPE_OVERHEAD) // slightly too large, but who cares |
58 | |
103 | |
59 | // hdr seq len hmac MAC MAC |
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60 | #define VPE_OVERHEAD (4 + 4 + 4 + RAND_SIZE + HMACLENGTH - 6 - 6) |
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61 | #define IP_OVERHEAD 20 // size of a (normal) ip header |
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62 | #define GRE_OVERHEAD (IP_OVERHEAD + 4) |
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63 | #define ICMP_OVERHEAD (IP_OVERHEAD + 4) |
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64 | #define UDP_OVERHEAD (IP_OVERHEAD + 20) // size of a (normal) ip + udp header (wrong, but don't care) |
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65 | #define TCP_OVERHEAD (IP_OVERHEAD + 22) // size of a (normal) ip + tcp header + packetlength |
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66 | #define MAX_OVERHEAD UDP_OVERHEAD // the max. overhead of any protocol (ok, tcp doesn't count) |
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67 | #define ETH_OVERHEAD 14 // the size of an ethernet header |
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68 | #define MAXSIZE (MAX_MTU + VPE_OVERHEAD)// slightly too large, but who cares |
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69 | |
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70 | #define PKTCACHESIZE 5 // the size of the memory pool for packets |
104 | #define PKTCACHESIZE 16 // the size of the memory pool for packets |
71 | |
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72 | #define QUEUEDEPTH 16 // the number of packets that will be queued (should be low) |
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73 | |
105 | |
74 | extern char *confbase; // directory in which all config files are |
106 | extern char *confbase; // directory in which all config files are |
75 | extern char *thisnode; // config for current node (TODO: remove) |
107 | extern char *thisnode; // config for current node (TODO: remove) |
76 | |
108 | |
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109 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
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110 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
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111 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
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112 | template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
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113 | |
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114 | 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; } |
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115 | |
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116 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
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117 | |
77 | #endif |
118 | #endif |
78 | |
119 | |