Method getSessionInfo

src/SFML/Network/Sftp.cpp:697–770

///////////////////////////////////////////////////////

////////////////////////////////////////////////////////////
std::optional<Sftp::SessionInfo> Sftp::getSessionInfo() const
{
    if (!m_impl->ssh2Session)
        return std::nullopt;

    SessionInfo sessionInfo;

    {
        std::size_t       length{};
        auto              type = 0;
        const auto* const ptr  = libssh2_session_hostkey(m_impl->ssh2Session.get(), &length, &type);

        if (length == 0)
            return std::nullopt;

        SessionInfo::HostKey hostKey;
        hostKey.data.resize(length);
        std::memcpy(hostKey.data.data(), ptr, length);

        switch (type)
        {
            case LIBSSH2_HOSTKEY_TYPE_RSA:
                hostKey.type = SessionInfo::HostKey::Type::Rsa;
                break;
            case LIBSSH2_HOSTKEY_TYPE_DSS:
                hostKey.type = SessionInfo::HostKey::Type::Dsa;
                break;
            case LIBSSH2_HOSTKEY_TYPE_ECDSA_256:
                hostKey.type = SessionInfo::HostKey::Type::Ecdsa256;
                break;
            case LIBSSH2_HOSTKEY_TYPE_ECDSA_384:
                hostKey.type = SessionInfo::HostKey::Type::Ecdsa384;
                break;
            case LIBSSH2_HOSTKEY_TYPE_ECDSA_521:
                hostKey.type = SessionInfo::HostKey::Type::Ecdsa521;
                break;
            case LIBSSH2_HOSTKEY_TYPE_ED25519:
                hostKey.type = SessionInfo::HostKey::Type::Ed25519;
                break;
            default:
                hostKey.type = SessionInfo::HostKey::Type::Unknown;
                break;
        }

        if (const auto* const hash = libssh2_hostkey_hash(m_impl->ssh2Session.get(), LIBSSH2_HOSTKEY_HASH_SHA1); hash)
            std::memcpy(hostKey.sha1.data(), hash, hostKey.sha1.size());

        if (const auto* const hash = libssh2_hostkey_hash(m_impl->ssh2Session.get(), LIBSSH2_HOSTKEY_HASH_SHA256); hash)
            std::memcpy(hostKey.sha256.data(), hash, hostKey.sha256.size());

        sessionInfo.hostKey = std::move(hostKey);
    }

    const auto getSessionMethod = [session = m_impl->ssh2Session.get()](int method) -> std::string
    {
        if (!session)
            return "";
        if (const auto* const result = libssh2_session_methods(session, method); result)