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 FLASHING.md says how to take a newer version of the colleague's tree (copy it over the folder, rebuild, test, commit).
77 lines
2.0 KiB
C++
77 lines
2.0 KiB
C++
#include "crl_store.hpp"
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#include "certificate_revocation_list.hpp"
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#include "filesystem.hpp"
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#include "hexstring.hpp"
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#include "security_module.hpp"
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namespace vanetza
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{
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namespace pki
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{
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CrlFilesystemStore::CrlFilesystemStore(std::shared_ptr<SecurityModule> security, const std::filesystem::path& root) :
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m_security(security), m_root(root)
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{
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std::filesystem::create_directories(m_root);
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for (const auto& entry : std::filesystem::directory_iterator(m_root)) {
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if (!entry.is_regular_file() || entry.path().extension() != ".crl") {
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continue;
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}
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ByteBuffer buf = read(entry.path());
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CertificateRevocationList crl;
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if (crl.decode(buf)) {
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index(crl);
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}
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}
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}
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bool CrlFilesystemStore::store(const CertificateRevocationList& crl)
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{
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auto issuer = index(crl);
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if (!issuer) {
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return false;
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}
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write(filename(*issuer), crl.encode());
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return true;
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}
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bool CrlFilesystemStore::is_revoked(const security::HashedId8& issuer, const security::HashedId8& cert) const
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{
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auto it = m_revoked.find(issuer);
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if (it == m_revoked.end()) {
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return false;
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}
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return it->second.count(cert) != 0;
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}
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std::filesystem::path CrlFilesystemStore::filename(const HashedId8& id) const
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{
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return m_root / (hexstring(id.octets) + ".crl");
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}
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boost::optional<HashedId8> CrlFilesystemStore::index(const CertificateRevocationList& crl)
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{
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auto issuer = crl.get_hashed_id8(*m_security);
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if (!issuer) {
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return boost::none;
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}
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auto entries = crl.revoked_entries();
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if (!entries) {
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return boost::none;
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}
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// Empty CRL is valid: it withdraws any prior revocations from this issuer.
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// Erase the existing bucket and only create a new one if there's content.
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m_revoked.erase(issuer->octets);
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if (!entries->empty()) {
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auto& bucket = m_revoked[issuer->octets];
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for (const auto& cert : *entries) {
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bucket.insert(cert.octets);
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}
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}
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return issuer;
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}
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} // namespace pki
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} // namespace vanetza
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