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 FLASHING.md says how to take a newer version of the colleague's tree (copy it over the folder, rebuild, test, commit).
65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
#pragma once
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#include <vanetza/security/hashed_id.hpp>
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#include <vanetza/security/v3/certificate.hpp>
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#include <unordered_map>
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#include <unordered_set>
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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 v3
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{
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/**
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* CertificateCache stores validated v1.3.1 certificates for later lookup.
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* Required for checking messages' signatures containing only a certificate digest.
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*/
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class CertificateCache
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{
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public:
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/**
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* Lookup certificate based on given digest
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* \param digest certificate digest
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* \return certificate matching digest
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*/
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const Certificate* lookup(const HashedId8& digest) const;
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const Certificate* lookup(const HashedId3& digest) const;
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/**
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* Store a (pre-validated) certificate in cache
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* \param cert certificate
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*/
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void store(Certificate cert);
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size_t size() const { return m_storage.size(); }
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/**
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* Announce a station with a given certificate digest.
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* \param digest certificate digest
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* \return true if digest was not known before
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*/
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bool announce(const HashedId8& digest);
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/**
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* Test if a certificate digest is already known, i.e. either
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* its certificate is stored or at least the digest has been announced.
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* \param digest certificate digest
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* \return true if digest is known
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*/
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bool is_known(const HashedId8& digest) const;
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private:
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using CertificateMap = std::unordered_map<HashedId8, Certificate>;
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using ShortDigestMap = std::unordered_map<HashedId3, CertificateMap::iterator>;
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// TODO add bounded capacity and automatic removal of expired certificates
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CertificateMap m_storage;
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ShortDigestMap m_short_digests;
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std::unordered_set<HashedId8> m_digests;
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};
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} // namespace v3
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} // namespace security
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} // namespace vanetza
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