upload

SafeRNG.h

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+#pragma once
+#include <string>
+
+class RandomNumberGenerator
+{
+private:
+	//主方案：OpenSSL，安全随机数，有极小概率失败
+	static bool FillWithOpenSSLRandom(unsigned char* dst, size_t len) noexcept;
+	//备用方案：std::mt19937_64/时间戳伪随机数，不怎么安全但是一定有数
+	static bool FillWithSTDMT19937_64(unsigned char* dst, size_t len) noexcept;
+	static std::string Bytes2HexString(const unsigned char* data, size_t len) noexcept;
+
+public:
+	static std::string SecureRandomHex(size_t bytes);
+};