Ashin Walpola
0e9525162d
obu-firmware builds against vanetza-idf from microbu-esp32c5/external, but that tree was gitignored, so a clone of this repository could not build the firmware it ships. It is now committed here as ordinary files in its own folder, microbu-esp32c5/: the colleague's commit cf4b99f plus the V2X2MAP bridge's signature verification (--trust) used on the bench. Nothing is fetched from or pushed to the colleague's repository; this repository and its remotes carry everything. The folder's own .gitignore keeps build output, downloaded components and private key material out, as it did there; the committed file set is identical to that repository's tracked files. The ESP32-C5 is still flashed from obu-firmware/, which only takes vanetza-idf from microbu-esp32c5/, so the two stay separate folders. FLASHING.md says how to take a newer version of the colleague's tree (copy it over the folder, rebuild, test, commit).
51 lines
1.7 KiB
C++
51 lines
1.7 KiB
C++
#pragma once
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#include "security_module.hpp"
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#include <vanetza/asn1/asn1c_wrapper.hpp>
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#include <vanetza/asn1/security/EtsiTs103097Data-Encrypted.h>
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namespace vanetza
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{
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namespace pki
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{
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// forward declarations
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struct HashedId8;
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class SecurityModule;
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class EncryptedData : public asn1::asn1c_oer_wrapper<Vanetza_Security_EtsiTs103097Data_Encrypted_85P0_t>
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{
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public:
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using wrapper = asn1::asn1c_oer_wrapper<Vanetza_Security_EtsiTs103097Data_Encrypted_85P0_t>;
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EncryptedData(std::shared_ptr<SecurityModule::EciesContext> ecies);
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void generate_ciphertext(const ByteBuffer& payload);
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void add_recipient_info(const HashedId8&);
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const OCTET_STRING_t* get_nonce() const;
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const OCTET_STRING_t* get_ciphertext() const;
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/**
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* \brief Decrypt a PKI response that reuses the request's symmetric AES key.
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*
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* Call on the same EncryptedData instance that built the request, after
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* decode()-ing the response body into it. The AA/EA encrypts its response
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* with the request's AES key referenced via pskRecipInfo
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* (TS 102 941 §6.2.3.3.2 for AT, §6.2.3.2.2 for EC).
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* \throws DecodingFailure if the ciphertext or pskRecipInfo is missing
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*/
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ByteBuffer decrypt();
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// Lower-level builders that mutate an EtsiTs103097Data-Encrypted value in-place
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static void init(asn1c_type& dest);
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static void set_aes_ccm_ciphertext(asn1c_type& dest, SecurityModule::EciesContext& ecies,
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const ByteBuffer& plaintext);
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static void append_recipient_info(asn1c_type& dest, const SecurityModule::EciesContext& ecies,
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const HashedId8& recipient);
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private:
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bool has_psk_recipient() const;
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std::shared_ptr<SecurityModule::EciesContext> m_ecies;
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};
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} // namespace pki
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} // namespace vanetza
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