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.
79 lines
1.8 KiB
C++
79 lines
1.8 KiB
C++
#include <vanetza/common/byte_sequence.hpp>
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#include <vanetza/security/backend_null.hpp>
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#include <vanetza/security/public_key.hpp>
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#include <vanetza/security/signature.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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EcdsaSignature BackendNull::sign_data(const ecdsa256::PrivateKey&, const ByteBuffer&)
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{
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static const EcdsaSignature fake = fake_signature();
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return fake;
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}
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Signature BackendNull::sign_digest(const PrivateKey&, const ByteBuffer&)
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{
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static const Signature empty {};
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return empty;
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}
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bool BackendNull::verify_data(const ecdsa256::PublicKey&, const ByteBuffer&, const EcdsaSignature&)
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{
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// accept everything
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return true;
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}
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bool BackendNull::verify_digest(const PublicKey&, const ByteBuffer&, const Signature&)
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{
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// accept everything
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return true;
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}
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boost::optional<Uncompressed> BackendNull::decompress_point(const EccPoint&)
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{
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return boost::none;
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}
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EcdsaSignature BackendNull::fake_signature() const
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{
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constexpr std::size_t size = 32;
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EcdsaSignature signature;
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X_Coordinate_Only coordinate;
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coordinate.x = random_byte_sequence(size, 0xdead);
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signature.R = coordinate;
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signature.s = random_byte_sequence(size, 0xbeef);
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return signature;
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}
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ByteBuffer BackendNull::calculate_hash(HashAlgorithm algo, const ByteBuffer&)
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{
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ByteBuffer hash;
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switch (algo) {
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case HashAlgorithm::SHA256:
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hash.resize(32);
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break;
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case HashAlgorithm::SHA384:
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hash.resize(48);
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break;
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default:
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break;
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}
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return hash;
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}
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ecdsa256::KeyPair BackendNull::generate_key_pair()
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{
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ecdsa256::KeyPair key_pair;
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key_pair.private_key.key.fill(0);
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key_pair.public_key.x.fill(0);
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key_pair.public_key.y.fill(0);
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return key_pair;
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}
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} // namespace security
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} // namespace vanetza
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