fortuna: add incr_reseed_ctr

fortuna.cpp

@@ -23,6 +23,8 @@ namespace fortuna {
 	Fortuna::~Fortuna() = default;
 
 	auto Fortuna::random_data(unsigned int n_bytes) -> void {
+		incr_reseed_ctr();
+
 		std::string n{R.Gen.generate_random_data(n_bytes)};
 		fmt::print("got you {} proper bytes from generate_random_data -> {}\n",
 				n_bytes, n);

fortuna.h

@@ -23,6 +23,10 @@ public:
 		Fortuna::R.null_da_ctr();
 	}
 
+	auto incr_reseed_ctr() -> void {
+		++Fortuna::R.reseed_ctr;
+	}
+
 	auto initialize_prng() -> void {
 		// TODO(me): handle the reseeds here as per Cryptography Engineering,
 		// p. 153