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 FLASHING.md says how to take a newer version of the colleague's tree (copy it over the folder, rebuild, test, commit).
193 lines
4.5 KiB
C++
193 lines
4.5 KiB
C++
#ifndef SUBJECT_ATTRIBUTE_HPP_IRZLEB7C
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#define SUBJECT_ATTRIBUTE_HPP_IRZLEB7C
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#include <vanetza/security/v2/int_x.hpp>
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#include <vanetza/security/v2/public_key.hpp>
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#include <vanetza/security/v2/serialization.hpp>
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#include <boost/variant/variant.hpp>
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#include <cstdint>
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#include <list>
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namespace vanetza
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{
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namespace security
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{
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namespace v2
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{
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/// SubjectAssurance specified in TS 103 097 v1.2.1 in section 6.6 and 7.4.1
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struct SubjectAssurance
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{
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SubjectAssurance(uint8_t _raw = 0) : raw(_raw) {}
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static constexpr uint8_t assurance_mask = 0xE0;
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static constexpr uint8_t confidence_mask = 0x03;
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uint8_t raw;
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uint8_t assurance() const
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{
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return (raw & assurance_mask) >> 5;
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}
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uint8_t confidence() const
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{
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return raw & confidence_mask;
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}
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};
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/// ItsAidSsp specified in TS 103 097 v1.2.1, section 6.9
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struct ItsAidSsp
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{
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IntX its_aid;
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ByteBuffer service_specific_permissions;
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};
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/// SubjectAttributeType specified in TS 103 097 v1.2.1, section 6.5
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enum class SubjectAttributeType : uint8_t {
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Verification_Key = 0, //VerificationKey
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Encryption_Key = 1, //EncryptionKey
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Assurance_Level = 2, //SubjectAssurance
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Reconstruction_Value = 3, //EccPoint
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ITS_AID_List = 32, //std::list<IntX>
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ITS_AID_SSP_List = 33, //std::list<ItsAidSsp>
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};
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/// VerificationKey specified in TS 103 097 v1.2.1, section 6.4
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struct VerificationKey
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{
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PublicKey key;
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};
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/// EncryptionKey specified in TS 103 097 v1.2.1, section 6.4
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struct EncryptionKey
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{
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PublicKey key;
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};
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/// SubjectAttribute specified in TS 103 097 v1.2.1, section 6.4
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using SubjectAttribute = boost::variant<
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VerificationKey,
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EncryptionKey,
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SubjectAssurance,
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EccPoint,
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std::list<IntX>,
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std::list<ItsAidSsp>
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>;
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/**
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* \brief Determines SubjectAttributeType to a given SubjectAttribute
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* \param attribute
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* \return type
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*/
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SubjectAttributeType get_type(const SubjectAttribute&);
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/**
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* \brief Calculates size of a SubjectAttribute
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* \param sub
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* \return number of octets needed to serialize the SubjectAttribute
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*/
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size_t get_size(const SubjectAttribute&);
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/**
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* \brief Calculates size of a SubjectAssurance
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* \param sub
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* \return number of octets needed to serialize the SubjectAssurance
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*/
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size_t get_size(const SubjectAssurance&);
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/**
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* \brief Calculates size of an ItsAidSsp
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* \param its_aid_ssp
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* \return number of octets needed to serialize the ItsAidSsp
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*/
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size_t get_size(const ItsAidSsp&);
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/**
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* \brief Deserializes a SubjectAttribute from a binary archive
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* \param ar with a serialized SubjectAttribute at the beginning
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* \param sub to deserialize
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* \return size of the deserialized SubjectAttribute
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*/
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size_t deserialize(InputArchive&, SubjectAttribute&);
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/**
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* \brief Deserializes an ItsAidSsp from a binary archive
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* \param ar with a serialized ItsAidSsp at the beginning
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* \param its_aid_ssp to deserialize
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* \return size of the deserialized ItsAidSsp
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*/
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size_t deserialize(InputArchive&, ItsAidSsp&);
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/**
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* \brief Serializes a SubjectAttribute into a binary archive
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* \param ar to serialize in
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* \param sub to serialize
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*/
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void serialize(OutputArchive&, const SubjectAttribute&);
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/**
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* \brief Serializes an ItsAidSsp into a binary archive
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* \param ar to serialize in
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* \param its_aid_ssp to serialize
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*/
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void serialize(OutputArchive&, const ItsAidSsp&);
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namespace detail
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{
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template<SubjectAttributeType>
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struct subject_attribute_type;
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template<>
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struct subject_attribute_type<SubjectAttributeType::Verification_Key>
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{
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using type = VerificationKey;
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};
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template<>
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struct subject_attribute_type<SubjectAttributeType::Encryption_Key>
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{
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using type = EncryptionKey;
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};
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template<>
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struct subject_attribute_type<SubjectAttributeType::Assurance_Level>
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{
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using type = SubjectAssurance;
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};
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template<>
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struct subject_attribute_type<SubjectAttributeType::Reconstruction_Value>
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{
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using type = EccPoint;
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};
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template<>
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struct subject_attribute_type<SubjectAttributeType::ITS_AID_List>
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{
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using type = std::list<IntX>;
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};
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template<>
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struct subject_attribute_type<SubjectAttributeType::ITS_AID_SSP_List>
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{
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using type = std::list<ItsAidSsp>;
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};
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} // namespace detail
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/**
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* \brief resolve type for matching SubjectAttributeType
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*
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* This is kind of the reverse function of get_type(const SubjectAttribute&)
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*/
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template<SubjectAttributeType T>
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using subject_attribute_type = typename detail::subject_attribute_type<T>::type;
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} // namespace v2
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} // namespace security
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} // namespace vanetza
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#endif /* SUBJECT_ATTRIBUTE_HPP_IRZLEB7C */
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