Ashin Walpola
d107534eb2
obu-firmware builds against the vanetza-idf C-ITS library, which until now came from the colleague's microbu-esp32c5 tree beside the repository and was not tracked here, so a clone of this repository could not build the firmware it ships. The library alone is now part of obu-firmware, as obu-firmware/external/vanetza-idf: their external/vanetza-idf at commit cf4b99f, unchanged (9775 files; see its PROVENANCE.md). CMake takes it from there by default; -DVANETZA_IDF_DIR still points the build elsewhere. The rest of the colleague's tree (their own VAM firmware, PKI tooling, station-link Python tools, the V2X2MAP bridge) stays out of this repository and gitignored; nothing is pushed to their repository. NOTES.md, docs/06, TODO.md and the pcap verifier's usage line point at the new location.
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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