class JWT::JWA::Rsa

def sign(data:, signing_key:)
  raise_sign_error!("The given key is a #{signing_key.class}. It has to be an OpenSSL::PKey::RSA instance") unless signing_key.is_a?(OpenSSL::PKey::RSA)
  raise_sign_error!('The key length must be greater than or equal to 2048 bits') if signing_key.n.num_bits < 2048
  signing_key.sign(OpenSSL::Digest.new(digest), data)
end