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.
109 lines
3.8 KiB
C++
109 lines
3.8 KiB
C++
#include <vanetza/common/its_aid.hpp>
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#include <vanetza/common/runtime.hpp>
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#include <vanetza/security/backend.hpp>
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#include <vanetza/security/v2/certificate_provider.hpp>
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#include <vanetza/security/v2/sign_header_policy.hpp>
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#include <vanetza/security/v2/sign_service.hpp>
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#include <vanetza/security/v2/signature.hpp>
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#include <future>
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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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namespace
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{
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/**
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* \brief signature used as placeholder until final signature is calculated
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* \return placeholder containing dummy data
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*/
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EcdsaSignature signature_placeholder()
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{
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const auto size = field_size(PublicKeyAlgorithm::ECDSA_NISTP256_With_SHA256);
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EcdsaSignature ecdsa;
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ecdsa.s.resize(size, 0x00);
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X_Coordinate_Only coordinate;
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coordinate.x.resize(size, 0x00);
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ecdsa.R = std::move(coordinate);
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return ecdsa;
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}
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} // namespace
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StraightSignService::StraightSignService(CertificateProvider& provider, Backend& backend, SignHeaderPolicy& policy) :
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m_certificates(provider), m_backend(backend), m_policy(policy)
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{
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}
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SignConfirm StraightSignService::sign(SignRequest&& request)
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{
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SecuredMessage secured_message;
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secured_message.payload.type = PayloadType::Signed;
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secured_message.payload.data = std::move(request.plain_message);
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secured_message.header_fields = m_policy.prepare_header(request, m_certificates);
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const auto& private_key = m_certificates.own_private_key();
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static const Signature placeholder = signature_placeholder();
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static const std::list<TrailerField> trailer_fields = { placeholder };
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ByteBuffer data_buffer = convert_for_signing(secured_message, trailer_fields);
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TrailerField trailer_field = m_backend.sign_data(private_key, data_buffer);
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secured_message.trailer_fields.push_back(trailer_field);
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return SignConfirm::success(std::move(secured_message));
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}
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DeferredSignService::DeferredSignService(CertificateProvider& provider, Backend& backend, SignHeaderPolicy& policy) :
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m_certificates(provider), m_backend(backend), m_policy(policy)
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{
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}
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SignConfirm DeferredSignService::sign(SignRequest&& request)
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{
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SecuredMessage secured_message;
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secured_message.payload.type = PayloadType::Signed;
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secured_message.payload.data = std::move(request.plain_message);
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secured_message.header_fields = m_policy.prepare_header(request, m_certificates);
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const auto& private_key = m_certificates.own_private_key();
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static const EcdsaSignature placeholder = signature_placeholder();
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static const std::list<TrailerField> trailer_fields = { Signature { placeholder } };
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auto future = std::async(std::launch::deferred, [this, secured_message, private_key]() {
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ByteBuffer data = convert_for_signing(secured_message, trailer_fields);
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return m_backend.sign_data(private_key, data);
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});
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EcdsaSignatureFuture signature(future.share(), placeholder);
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secured_message.trailer_fields.push_back(Signature { std::move(signature) });
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return SignConfirm::success(std::move(secured_message));
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}
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DummySignService::DummySignService(const Runtime& runtime, const SignerInfo& signer) :
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m_runtime(runtime), m_signer_info(signer)
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{
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}
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SignConfirm DummySignService::sign(SignRequest&& request)
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{
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static const Signature null_signature { signature_placeholder() };
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SecuredMessage secured_message;
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secured_message.payload.type = PayloadType::Signed;
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secured_message.payload.data = std::move(request.plain_message);
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secured_message.header_fields.push_back(convert_time64(m_runtime.now()));
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secured_message.header_fields.push_back(request.its_aid);
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secured_message.header_fields.push_back(m_signer_info);
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secured_message.trailer_fields.push_back(null_signature);
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return SignConfirm::success(std::move(secured_message));
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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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