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Diffstat (limited to 'src/auth_algo.h')
| -rw-r--r-- | src/auth_algo.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/auth_algo.h b/src/auth_algo.h new file mode 100644 index 0000000..b22ea46 --- /dev/null +++ b/src/auth_algo.h @@ -0,0 +1,63 @@ +/* + * ľAnytun + * + * ľAnytun is a tiny implementation of SATP. Unlike Anytun which is a full + * featured implementation ľAnytun has no support for multiple connections + * or synchronisation. It is a small single threaded implementation intended + * to act as a client on small platforms. + * The secure anycast tunneling protocol (satp) defines a protocol used + * for communication between any combination of unicast and anycast + * tunnel endpoints. It has less protocol overhead than IPSec in Tunnel + * mode and allows tunneling of every ETHER TYPE protocol (e.g. + * ethernet, ip, arp ...). satp directly includes cryptography and + * message authentication based on the methodes used by SRTP. It is + * intended to deliver a generic, scaleable and secure solution for + * tunneling and relaying of packets of any protocol. + * + * + * Copyright (C) 2007-2008 Christian Pointner <equinox@anytun.org> + * + * This file is part of ľAnytun. + * + * ľAnytun is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 3 as + * published by the Free Software Foundation. + * + * ľAnytun 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 ľAnytun. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef _AUTH_ALGO_H_ +#define _AUTH_ALGO_H_ + +#include <gcrypt.h> +#include "key_derivation.h" + +enum auth_algo_type_enum { aa_unknown, aa_null, aa_sha1 }; +typedef enum auth_algo_type_enum auth_algo_type_t; + +struct auth_algo_struct { + auth_algo_type_t type_; + buffer_t key_; + gcry_md_hd_t handle_; +}; +typedef struct auth_algo_struct auth_algo_t; + +int auth_algo_init(auth_algo_t* aa, const char* type); +void auth_algo_close(auth_algo_t* aa); + +void auth_algo_generate(auth_algo_t* aa, key_derivation_t* kd, encrypted_packet_t* packet); +int auth_algo_check_tag(auth_algo_t* aa, key_derivation_t* kd, encrypted_packet_t* packet); + +#define SHA1_LENGTH 20 +int auth_algo_sha1_init(auth_algo_t* aa); +void auth_algo_sha1_close(auth_algo_t* aa); +void auth_algo_sha1_generate(auth_algo_t* aa, key_derivation_t* kd, encrypted_packet_t* packet); +int auth_algo_sha1_check_tag(auth_algo_t* aa, key_derivation_t* kd, encrypted_packet_t* packet); + +#endif |