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181 lines
7.6 KiB
C++
181 lines
7.6 KiB
C++
/*
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* Copyright 2013-2020 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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*
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* srsLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsLTE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#ifndef SRSLTE_SECURITY_H
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#define SRSLTE_SECURITY_H
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/******************************************************************************
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* Common security header - wraps ciphering/integrity check algorithms.
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*****************************************************************************/
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#include "srslte/common/common.h"
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namespace srslte {
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typedef enum {
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CIPHERING_ALGORITHM_ID_EEA0 = 0,
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CIPHERING_ALGORITHM_ID_128_EEA1,
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CIPHERING_ALGORITHM_ID_128_EEA2,
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CIPHERING_ALGORITHM_ID_128_EEA3,
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CIPHERING_ALGORITHM_ID_N_ITEMS,
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} CIPHERING_ALGORITHM_ID_ENUM;
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static const char ciphering_algorithm_id_text[CIPHERING_ALGORITHM_ID_N_ITEMS][20] = {"EEA0",
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"128-EEA1",
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"128-EEA2",
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"128-EEA3"};
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typedef enum {
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INTEGRITY_ALGORITHM_ID_EIA0 = 0,
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INTEGRITY_ALGORITHM_ID_128_EIA1,
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INTEGRITY_ALGORITHM_ID_128_EIA2,
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INTEGRITY_ALGORITHM_ID_128_EIA3,
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INTEGRITY_ALGORITHM_ID_N_ITEMS,
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} INTEGRITY_ALGORITHM_ID_ENUM;
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static const char integrity_algorithm_id_text[INTEGRITY_ALGORITHM_ID_N_ITEMS][20] = {"EIA0",
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"128-EIA1",
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"128-EIA2",
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"128-EIA3"};
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typedef enum {
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SECURITY_DIRECTION_UPLINK = 0,
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SECURITY_DIRECTION_DOWNLINK = 1,
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SECURITY_DIRECTION_N_ITEMS,
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} security_direction_t;
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static const char security_direction_text[INTEGRITY_ALGORITHM_ID_N_ITEMS][20] = {"Uplink", "Downlink"};
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using as_key_t = std::array<uint8_t, 32>;
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struct as_security_config_t {
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as_key_t k_rrc_int;
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as_key_t k_rrc_enc;
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as_key_t k_up_int;
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as_key_t k_up_enc;
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INTEGRITY_ALGORITHM_ID_ENUM integ_algo;
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CIPHERING_ALGORITHM_ID_ENUM cipher_algo;
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};
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/******************************************************************************
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* Key Generation
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*****************************************************************************/
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uint8_t security_generate_k_asme(uint8_t* ck,
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uint8_t* ik,
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uint8_t* ak,
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uint8_t* sqn,
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uint16_t mcc,
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uint16_t mnc,
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uint8_t* k_asme);
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uint8_t security_generate_k_enb(uint8_t* k_asme, uint32_t nas_count, uint8_t* k_enb);
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uint8_t security_generate_k_enb_star(uint8_t* k_enb, uint32_t pci, uint32_t earfcn, uint8_t* k_enb_star);
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uint8_t security_generate_nh(uint8_t* k_asme, uint8_t* sync, uint8_t* nh);
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uint8_t security_generate_k_nas(uint8_t* k_asme,
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CIPHERING_ALGORITHM_ID_ENUM enc_alg_id,
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INTEGRITY_ALGORITHM_ID_ENUM int_alg_id,
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uint8_t* k_nas_enc,
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uint8_t* k_nas_int);
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uint8_t security_generate_k_rrc(uint8_t* k_enb,
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CIPHERING_ALGORITHM_ID_ENUM enc_alg_id,
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INTEGRITY_ALGORITHM_ID_ENUM int_alg_id,
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uint8_t* k_rrc_enc,
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uint8_t* k_rrc_int);
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uint8_t security_generate_k_up(uint8_t* k_enb,
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CIPHERING_ALGORITHM_ID_ENUM enc_alg_id,
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INTEGRITY_ALGORITHM_ID_ENUM int_alg_id,
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uint8_t* k_up_enc,
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uint8_t* k_up_int);
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/******************************************************************************
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* Integrity Protection
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*****************************************************************************/
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uint8_t security_128_eia1(const uint8_t* key,
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uint32_t count,
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uint32_t bearer,
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uint8_t direction,
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uint8_t* msg,
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uint32_t msg_len,
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uint8_t* mac);
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uint8_t security_128_eia2(const uint8_t* key,
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uint32_t count,
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uint32_t bearer,
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uint8_t direction,
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uint8_t* msg,
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uint32_t msg_len,
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uint8_t* mac);
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uint8_t security_128_eia3(uint8_t* key,
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uint32_t count,
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uint32_t bearer,
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uint8_t direction,
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uint8_t* msg,
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uint32_t msg_len,
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uint8_t* mac);
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uint8_t security_md5(const uint8_t* input, size_t len, uint8_t* output);
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/******************************************************************************
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* Encryption / Decryption
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*****************************************************************************/
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uint8_t security_128_eea1(uint8_t* key,
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uint32_t count,
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uint8_t bearer,
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uint8_t direction,
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uint8_t* msg,
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uint32_t msg_len,
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uint8_t* msg_out);
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uint8_t security_128_eea2(uint8_t* key,
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uint32_t count,
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uint8_t bearer,
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uint8_t direction,
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uint8_t* msg,
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uint32_t msg_len,
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uint8_t* msg_out);
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uint8_t security_128_eea3(uint8_t* key,
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uint32_t count,
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uint8_t bearer,
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uint8_t direction,
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uint8_t* msg,
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uint32_t msg_len,
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uint8_t* msg_out);
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/******************************************************************************
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* Authentication
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*****************************************************************************/
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uint8_t compute_opc(uint8_t* k, uint8_t* op, uint8_t* opc);
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uint8_t security_milenage_f1(uint8_t* k, uint8_t* op, uint8_t* rand, uint8_t* sqn, uint8_t* amf, uint8_t* mac_a);
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uint8_t security_milenage_f1_star(uint8_t* k, uint8_t* op, uint8_t* rand, uint8_t* sqn, uint8_t* amf, uint8_t* mac_s);
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uint8_t
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security_milenage_f2345(uint8_t* k, uint8_t* op, uint8_t* rand, uint8_t* res, uint8_t* ck, uint8_t* ik, uint8_t* ak);
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uint8_t security_milenage_f5_star(uint8_t* k, uint8_t* op, uint8_t* rand, uint8_t* ak);
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} // namespace srslte
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#endif // SRSLTE_SECURITY_H
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