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97 lines
2.9 KiB
C++
97 lines
2.9 KiB
C++
/**
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* Copyright 2013-2022 Software Radio Systems Limited
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*
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* This file is part of srsRAN.
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*
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* srsRAN 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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* srsRAN 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 SRSUE_NAS_BASE_H
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#define SRSUE_NAS_BASE_H
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#include "srsran/asn1/liblte_mme.h"
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#include "srsran/common/buffer_pool.h"
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#include "srsran/common/common.h"
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#include "srsran/common/nas_pcap.h"
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#include "srsran/common/security.h"
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#include "srsran/common/string_helpers.h"
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#include "srsran/config.h"
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using srsran::byte_buffer_t;
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namespace srsue {
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class nas_base
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{
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public:
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nas_base(srslog::basic_logger& logger_, uint32_t mac_offset, uint32_t seq_offset_, uint32_t bearer_id_);
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// PCAP
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void start_pcap(srsran::nas_pcap* pcap_) { pcap = pcap_; }
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protected:
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srslog::basic_logger& logger;
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// PCAP
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srsran::nas_pcap* pcap = nullptr;
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// Security context
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// Base context applies for LTE and 5G
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struct nas_sec_base_ctxt {
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uint8_t k_nas_enc[32] = {};
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uint8_t k_nas_int[32] = {};
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srsran::CIPHERING_ALGORITHM_ID_ENUM cipher_algo;
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srsran::INTEGRITY_ALGORITHM_ID_ENUM integ_algo;
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uint32_t tx_count;
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uint32_t rx_count;
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};
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// Only applies for LTE
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struct nas_sec_ctxt {
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uint8_t ksi;
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uint8_t k_asme[32];
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uint32_t k_enb_count;
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LIBLTE_MME_EPS_MOBILE_ID_GUTI_STRUCT guti;
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};
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// Only applies for 5G
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struct nas_5g_sec_ctxt {
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uint8_t ksi;
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uint8_t k_amf[32];
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uint32_t k_gnb_count;
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};
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nas_sec_base_ctxt ctxt_base = {};
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nas_sec_ctxt ctxt = {};
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nas_5g_sec_ctxt ctxt_5g = {};
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int parse_security_algorithm_list(std::string algorithm_string, bool* algorithm_caps);
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// Security
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void
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integrity_generate(uint8_t* key_128, uint32_t count, uint8_t direction, uint8_t* msg, uint32_t msg_len, uint8_t* mac);
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bool integrity_check(srsran::byte_buffer_t* pdu);
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void cipher_encrypt(srsran::byte_buffer_t* pdu);
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void cipher_decrypt(srsran::byte_buffer_t* pdu);
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uint32_t mac_offset = 0;
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uint32_t seq_offset = 0;
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uint32_t bearer_id = 0;
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const std::string gw_setup_failure_str = "Failed to setup/configure GW interface";
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};
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} // namespace srsue
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#endif
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