83 lines
2.1 KiB
C++
83 lines
2.1 KiB
C++
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#include "station_config_filesystem.hpp"
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#include <fstream>
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#include <stdexcept>
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#include <system_error>
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namespace vanetza
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{
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namespace pki
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{
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namespace
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{
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// Write text to a config file; on a write error remove the half-written file so a later
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// read sees a clean "unset" state rather than a corrupt one.
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void write_config(const std::filesystem::path& path, const std::string& content)
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{
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std::ofstream ofs(path);
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ofs << content;
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ofs.flush();
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if (!ofs) {
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std::error_code ec;
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std::filesystem::remove(path, ec);
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throw std::runtime_error("could not write station config file " + path.string());
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}
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}
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} // namespace
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StationConfigurationFilesystem::StationConfigurationFilesystem(const std::filesystem::path& root) : m_root(root)
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{
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std::filesystem::create_directories(m_root);
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}
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std::string StationConfigurationFilesystem::get_canonical_identifier() const
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{
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std::ifstream ifs(m_root / "identifier");
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std::string identifier;
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std::getline(ifs, identifier);
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return identifier;
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}
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void StationConfigurationFilesystem::set_canonical_identifier(const std::string& identifier)
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{
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write_config(m_root / "identifier", identifier);
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}
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boost::optional<HashedId8> StationConfigurationFilesystem::get_ec_identifier() const
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{
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return get_hid8(m_root / "ec.hid8");
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}
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void StationConfigurationFilesystem::set_ec_identifier(const HashedId8& id)
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{
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set_hid8(m_root / "ec.hid8", id);
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}
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boost::optional<HashedId8> StationConfigurationFilesystem::get_root_ca() const
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{
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return get_hid8(m_root / "rootca.hid8");
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}
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void StationConfigurationFilesystem::set_root_ca(const HashedId8& id)
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{
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set_hid8(m_root / "rootca.hid8", id);
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}
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boost::optional<HashedId8> StationConfigurationFilesystem::get_hid8(const std::filesystem::path& path) const
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{
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std::ifstream ifs(path);
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std::string hex;
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std::getline(ifs, hex);
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return HashedId8::from_hexstring(hex);
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}
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void StationConfigurationFilesystem::set_hid8(const std::filesystem::path& path, const HashedId8& id)
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{
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write_config(path, hexstring(id));
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}
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} // namespace pki
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} // namespace vanetza
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