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 FLASHING.md says how to take a newer version of the colleague's tree (copy it over the folder, rebuild, test, commit).
138 lines
3.5 KiB
C++
138 lines
3.5 KiB
C++
#include <vanetza/security/exception.hpp>
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#include <vanetza/security/v2/public_key.hpp>
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#include <boost/variant/apply_visitor.hpp>
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#include <boost/variant/static_visitor.hpp>
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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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PublicKeyAlgorithm get_type(const PublicKey& key)
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{
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struct public_key_visitor : public boost::static_visitor<PublicKeyAlgorithm>
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{
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PublicKeyAlgorithm operator()(const ecdsa_nistp256_with_sha256&)
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{
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return PublicKeyAlgorithm::ECDSA_NISTP256_With_SHA256;
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}
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PublicKeyAlgorithm operator()(const ecies_nistp256&)
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{
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return PublicKeyAlgorithm::ECIES_NISTP256;
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}
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};
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public_key_visitor visit;
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return boost::apply_visitor(visit, key);
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}
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void serialize(OutputArchive& ar, const PublicKey& key)
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{
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struct public_key_visitor : public boost::static_visitor<>
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{
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public_key_visitor(OutputArchive& ar, PublicKeyAlgorithm algo) :
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m_archive(ar), m_algo(algo)
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{
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}
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void operator()(const ecdsa_nistp256_with_sha256& ecdsa)
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{
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serialize(m_archive, ecdsa.public_key, m_algo);
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}
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void operator()(const ecies_nistp256& ecies)
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{
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serialize(m_archive, ecies.supported_symm_alg);
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serialize(m_archive, ecies.public_key, m_algo);
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}
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OutputArchive& m_archive;
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PublicKeyAlgorithm m_algo;
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};
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PublicKeyAlgorithm type = get_type(key);
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serialize(ar, type);
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public_key_visitor visit(ar, type);
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boost::apply_visitor(visit, key);
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}
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std::size_t field_size(PublicKeyAlgorithm algo)
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{
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size_t size = 0;
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switch (algo) {
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case PublicKeyAlgorithm::ECDSA_NISTP256_With_SHA256:
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size = 32;
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break;
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case PublicKeyAlgorithm::ECIES_NISTP256:
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size = 32;
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break;
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}
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return size;
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}
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std::size_t field_size(SymmetricAlgorithm algo)
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{
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size_t size = 0;
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switch (algo) {
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case SymmetricAlgorithm::AES128_CCM:
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size = 16;
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break;
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default:
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throw deserialization_error("Unknown SymmetricAlgorithm");
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break;
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}
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return size;
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}
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size_t deserialize(InputArchive& ar, PublicKey& key)
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{
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PublicKeyAlgorithm type;
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deserialize(ar, type);
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switch (type) {
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case PublicKeyAlgorithm::ECDSA_NISTP256_With_SHA256: {
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ecdsa_nistp256_with_sha256 ecdsa;
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deserialize(ar, ecdsa.public_key, PublicKeyAlgorithm::ECDSA_NISTP256_With_SHA256);
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key = ecdsa;
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break;
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}
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case PublicKeyAlgorithm::ECIES_NISTP256: {
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ecies_nistp256 ecies;
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deserialize(ar, ecies.supported_symm_alg);
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deserialize(ar, ecies.public_key, PublicKeyAlgorithm::ECIES_NISTP256);
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key = ecies;
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break;
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}
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default:
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throw deserialization_error("Unknown PublicKeyAlgorithm");
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break;
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}
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return get_size(key);
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}
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size_t get_size(const PublicKey& key)
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{
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size_t size = sizeof(PublicKeyAlgorithm);
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struct publicKey_visitor : public boost::static_visitor<size_t>
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{
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size_t operator()(ecdsa_nistp256_with_sha256 key)
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{
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return get_size(key.public_key);
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}
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size_t operator()(ecies_nistp256 key)
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{
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return get_size(key.public_key) + sizeof(key.supported_symm_alg);
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}
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};
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publicKey_visitor visit;
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size += boost::apply_visitor(visit, key);
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return size;
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}
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} // namespace v2
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} // namespace security
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} // namespace vanetza
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