4 * uAnytun is a tiny implementation of SATP. Unlike Anytun which is a full
5 * featured implementation uAnytun has no support for multiple connections
6 * or synchronisation. It is a small single threaded implementation intended
7 * to act as a client on small platforms.
8 * The secure anycast tunneling protocol (satp) defines a protocol used
9 * for communication between any combination of unicast and anycast
10 * tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
11 * mode and allows tunneling of every ETHER TYPE protocol (e.g.
12 * ethernet, ip, arp ...). satp directly includes cryptography and
13 * message authentication based on the methodes used by SRTP. It is
14 * intended to deliver a generic, scaleable and secure solution for
15 * tunneling and relaying of packets of any protocol.
18 * Copyright (C) 2007-2010 Christian Pointner <equinox@anytun.org>
20 * This file is part of uAnytun.
22 * uAnytun is free software: you can redistribute it and/or modify
23 * it under the terms of the GNU General Public License as published by
24 * the Free Software Foundation, either version 3 of the License, or
27 * uAnytun is distributed in the hope that it will be useful,
28 * but WITHOUT ANY WARRANTY; without even the implied warranty of
29 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30 * GNU General Public License for more details.
32 * You should have received a copy of the GNU General Public License
33 * along with uAnytun. If not, see <http://www.gnu.org/licenses/>.
36 #ifndef UANYTUN_auth_algo_h_INCLUDED
37 #define UANYTUN_auth_algo_h_INCLUDED
39 #ifndef USE_SSL_CRYPTO
42 #include <openssl/hmac.h>
44 #include "key_derivation.h"
45 #include "encrypted_packet.h"
47 enum auth_algo_type_enum { aa_unknown, aa_null, aa_sha1 };
48 typedef enum auth_algo_type_enum auth_algo_type_t;
50 struct auth_algo_struct {
51 auth_algo_type_t type_;
55 typedef struct auth_algo_struct auth_algo_t;
57 auth_algo_type_t auth_algo_get_type(const char* type);
58 u_int32_t auth_algo_get_max_length(const char* type);
59 int auth_algo_init(auth_algo_t* aa, const char* type);
60 void auth_algo_close(auth_algo_t* aa);
62 void auth_algo_generate(auth_algo_t* aa, key_derivation_t* kd, key_derivation_dir_t dir, encrypted_packet_t* packet);
63 int auth_algo_check_tag(auth_algo_t* aa, key_derivation_t* kd, key_derivation_dir_t dir, encrypted_packet_t* packet);
66 #define SHA1_LENGTH 20
68 struct auth_algo_sha1_param_struct {
69 #ifndef USE_SSL_CRYPTO
75 typedef struct auth_algo_sha1_param_struct auth_algo_sha1_param_t;
77 int auth_algo_sha1_init(auth_algo_t* aa);
78 void auth_algo_sha1_close(auth_algo_t* aa);
79 void auth_algo_sha1_generate(auth_algo_t* aa, key_derivation_t* kd, key_derivation_dir_t dir, encrypted_packet_t* packet);
80 int auth_algo_sha1_check_tag(auth_algo_t* aa, key_derivation_t* kd, key_derivation_dir_t dir, encrypted_packet_t* packet);