1 files changed, 51 insertions, 0 deletions
diff --git a/src/cryptography/nostr_secure_rng.hpp b/src/cryptography/nostr_secure_rng.hpp
new file mode 100644
index 0000000..7fa340e
--- /dev/null
+++ b/src/cryptography/nostr_secure_rng.hpp
@@ -0,0 +1,51 @@
+#pragma once
+
+#include <memory>
+
+namespace nostr
+{
+namespace cryptography
+{
+
+class NostrSecureRng
+{
+private:
+
+public:
+
+    /**
+	* @brief Fills the given buffer with secure random bytes.
+	* @param buffer The buffer to fill with random bytes.
+	* @param length The number of bytes to fill.
+    */
+    static void fill(void* buffer, size_t length);
+
+    /*
+	* @brief Fills the given vector with secure random bytes.
+	* @param buffer The vector to fill with random bytes.
+    */
+    static inline void fill(std::vector<uint8_t>& buffer);
+
+    /*
+     * @brief Reseeds the RNG with random bytes from /dev/random.
+     * @param bufferSize The number of bytes to read from /dev/random.
+     * @remark Falls back to /dev/urandom if /dev/random is not available.
+     */
+    static void reseed(uint32_t bufferSize = 32);
+
+    /*
+     * @brief Securley zeroes out the given buffer.
+     * @param buffer A pointer to the buffer to zero out.
+     * @param length The number of bytes to zero out.
+     */
+    static void zero(void* buffer, size_t length);
+
+    /*
+     * @brief Securley zeroes out the given vector.
+     * @param buffer The vector to zero out.
+     */
+    static inline void zero(std::vector<uint8_t>& buffer);
+};
+
+} // namespace cryptography
+} // namespace nostr