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Diffstat (limited to 'src/key_derivation.h')
| -rw-r--r-- | src/key_derivation.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/src/key_derivation.h b/src/key_derivation.h new file mode 100644 index 0000000..6e1a1e3 --- /dev/null +++ b/src/key_derivation.h @@ -0,0 +1,70 @@ +/* + * 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 _KEY_DERIVATION_H_ +#define _KEY_DERIVATION_H_ + +#include <gcrypt.h> + +enum satp_prf_label_enum { + LABEL_SATP_ENCRYPTION = 0x00, + LABEL_SATP_MSG_AUTH = 0x01, + LABEL_SATP_SALT = 0x02, +}; +typedef enum satp_prf_label_enum satp_prf_label_t; + +enum key_derivation_type_enum { unknown, null, aes_ctr }; +typedef enum key_derivation_type_enum key_derivation_type_t; + +struct key_derivation_struct { + key_derivation_type_t type_; + int8_t ld_kdr_; + buffer_t master_key_; + buffer_t master_salt_; + gcry_cipher_hd_t handle_; +}; +typedef struct key_derivation_struct key_derivation_t; + +int key_derivation_init(key_derivation_t* kd, const char* type, u_int8_t* key, u_int32_t key_len, u_int8_t* salt, u_int32_t salt_len); +void key_derivation_close(key_derivation_t* kd); +void key_derivation_generate(key_derivation_t* kd, satp_prf_label_t label, seq_nr_t seq_nr, u_int8_t* key, u_int32_t len); + +void key_derivation_null_generate(u_int8_t* key, u_int32_t len); + +int key_derivation_aesctr_init(key_derivation_t* kd, u_int8_t* key, u_int32_t key_len, u_int8_t* salt, u_int32_t salt_len); +void key_derivation_aesctr_close(key_derivation_t* kd); +buffer_t key_derivation_aesctr_calc_ctr(key_derivation_t* kd, satp_prf_label_t label, seq_nr_t seq_nr); +void key_derivation_aesctr_generate(key_derivation_t* kd, satp_prf_label_t label, seq_nr_t seq_nr, u_int8_t* key, u_int32_t len); + +#endif |