BouncyCastle的SecureRandom在C＃中是线程安全的吗？ [英] Is BouncyCastle's SecureRandom in C# threadsafe?

问题描述

对于Java中的实现，答案显然是是，但是 Org.BouncyCastle如何？ .Security.SecureRandom 在C＃中？

The answer is apparently yes for the implementation in Java, but how about Org.BouncyCastle.Security.SecureRandom in C#?

推荐答案

据我所知，目前还没有C＃Bouncy Castle端口的官方（甚至任何）文档-我们所能做的就是查看源代码并尝试得出一些结论。这是 SecureRandom 的源代码。 。我们可以看到主要方法有 NextCounterValue （用于生成种子）和 NextBytes 用于生成实际随机数据。 NextCounterValue 是线程安全的（使用 Interlocked.Increment ）。 NextBytes 将实现转发到 IRandomGenerator 的实例。由于您可以将 IRandomGenerator 的任何实例传递给 SecureRandom 的构造函数-我们可以得出结论，其线程安全性取决于 IRandomGenerator 已使用。

Since, as far as I know, there is no official (or even any) documentation of C# Bouncy Castle port - all we can do is look at source code and try to draw some conclusions. Here is source code of SecureRandom. We can see that the main methods there are NextCounterValue (used to generate seeds) and NextBytes used to generate actual random data. NextCounterValue is thread-safe (uses Interlocked.Increment). NextBytes forwards implementation to instance of IRandomGenerator. Since you can pass any instance of IRandomGenerator to constructor of SecureRandom - we can conclude that its thread safety depends on that of IRandomGenerator used.

在完整的.NET Framework上， SecureRandom 使用 CryptoApiRandomGenerator 作为主生成器（用于生成种子），并且它只是.NET RNGCryptoServiceProvider 的包装，我们知道这是线程安全的。

Also when on full .NET Framework, SecureRandom uses CryptoApiRandomGenerator as master generator (to generate seeds) and that one is just wrapper around .NET RNGCryptoServiceProvider which as we know is thread safe.

如果仅创建 SecureRandom 而没有传递任何 IRandomGenerator 怎么办？然后它将创建 DigestRandomGenerator 的实例（代码）似乎是线程安全的（在中使用简单的 lock

What if you just create SecureRandom without passing any IRandomGenerator? Then it will create instance of DigestRandomGenerator (code) which seems to be thread-safe (uses simple lock in NextBytes).

总而言之，我们可以说 SecureRandom 是线程安全的，如果您没有传递不是线程安全的 IRandomGenerator 实例。

All in all we can say that SecureRandom is thread safe if you are not passing an instance of IRandomGenerator which is not thread-safe to it.

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