libs: add ongoing work to facilitate hactool rewrite

libraries/libstratosphere/source/crypto/crypto_csrng.os.windows.cpp

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stratosphere.hpp>
+#include <ntstatus.h>
+#include <bcrypt.h>
+
+namespace ams::crypto {
+
+    void GenerateCryptographicallyRandomBytes(void *dst, size_t dst_size) {
+        const auto status = ::BCryptGenRandom(nullptr, static_cast<PUCHAR>(dst), dst_size, BCRYPT_USE_SYSTEM_PREFERRED_RNG);
+        AMS_ABORT_UNLESS(status == STATUS_SUCCESS);
+    }
+
+}