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75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
3 years ago
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/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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*
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*/
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#ifndef SRSRAN_RRC_NR_SECURITY_CONTEXT_H
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#define SRSRAN_RRC_NR_SECURITY_CONTEXT_H
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#include "srsgnb/hdr/stack/rrc/rrc_nr_config.h"
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#include "srsran/asn1/ngap.h"
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#include "srsran/interfaces/gnb_interfaces.h"
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#include "srsran/srslog/srslog.h"
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namespace srsgnb {
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class nr_security_context
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{
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public:
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explicit nr_security_context(const srsenb::rrc_nr_cfg_t& cfg_) :
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cfg(&cfg_), logger(srslog::fetch_basic_logger("RRC_NR"))
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{}
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explicit nr_security_context(const nr_security_context& other) : logger(srslog::fetch_basic_logger("RRC_NR"))
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{
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cfg = other.cfg;
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k_gnb_present = other.k_gnb_present;
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security_capabilities = other.security_capabilities;
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std::copy(other.k_gnb, other.k_gnb + 32, k_gnb);
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sec_cfg = other.sec_cfg;
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ncc = other.ncc;
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}
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nr_security_context& operator=(const nr_security_context& other)
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{
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cfg = other.cfg;
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k_gnb_present = other.k_gnb_present;
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security_capabilities = other.security_capabilities;
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std::copy(other.k_gnb, other.k_gnb + 32, k_gnb);
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sec_cfg = other.sec_cfg;
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ncc = other.ncc;
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return *this;
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}
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bool set_security_capabilities(const asn1::ngap_nr::ue_security_cap_s& caps);
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void set_security_key(const asn1::fixed_bitstring<256, false, true>& key);
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void set_ncc(uint8_t ncc_) { ncc = ncc_; }
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asn1::rrc_nr::security_algorithm_cfg_s get_security_algorithm_cfg() const;
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const srsran::as_security_config_t& get_as_sec_cfg() const { return sec_cfg; }
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uint8_t get_ncc() const { return ncc; }
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bool is_as_sec_cfg_valid() const { return k_gnb_present; }
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void regenerate_keys_handover(uint32_t new_pci, uint32_t new_dl_earfcn);
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private:
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void generate_as_keys();
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srslog::basic_logger& logger;
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const srsenb::rrc_nr_cfg_t* cfg = nullptr;
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bool k_gnb_present = false;
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asn1::ngap_nr::ue_security_cap_s security_capabilities = {};
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uint8_t k_gnb[32] = {}; // Provided by MME
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srsran::as_security_config_t sec_cfg = {};
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uint8_t ncc = 0;
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};
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} // namespace srsgnb
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#endif
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