SHA256CryptoServiceProvider不符合FIPS？ [英] SHA256CryptoServiceProvider not FIPS compliant?

问题描述

我要寻找一个在C＃中SHA256的实现，是符合FIPS。事实证明，SHA1CryptoServiceProvider工作。但是为什么SHA256CryptoServiceProvider跳闸

  {此实现不验证的Windows平台FIPS的一部分加密算法。} 
  

错误？ 。看起来它应该只是工作。

  VAR SHA = System.Security.Cryptography.SHA256CryptoServiceProvider.Create（）; //不是FIPS 
  

在这种情况下，我使用.NET 4.5，但同样的事情发生在3.5和4.0。我以为SHA256CryptoServiceProvider是符合FIPS标准的替代SHA256Managed。 SHA256Cng抛出了同样的错误。

更新。我想我需要做出一个新SHA256CryptoServiceProvider而不是使用的Create（）

解决方案

由于在更新建议楼主，解决的办法就是实际创建SHA256CryptoServiceProvider（或512）的新实例。创建调用将无法工作：

  VAR CSP =新SHA512CryptoServiceProvider（）; 
字节[] = hashedBytes csp.ComputeHash（......）; 
字符串hashedText = Convert.ToBase64String（hashedBytes）; 
  

I am looking for a SHA256 implementation in C# that is FIPS compliant. It turns out that SHA1CryptoServiceProvider works. But why does SHA256CryptoServiceProvider trip the

{"This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms."}

error? Seems like it should just work.

var sha = System.Security.Cryptography.SHA256CryptoServiceProvider.Create();   // not FIPS

In this case I am using .NET 4.5, but the same thing happens in 3.5 and 4.0. I thought SHA256CryptoServiceProvider was the FIPS-compliant alternative to SHA256Managed. SHA256Cng throws the same error.

Update. I think I needed to make a "new SHA256CryptoServiceProvider" instead of using Create()

解决方案

As the original poster suggested in the update, the solution is to actually create a new instance of the SHA256CryptoServiceProvider (or 512). Calling Create will not work:

var csp = new SHA512CryptoServiceProvider();
byte[] hashedBytes = csp.ComputeHash(......);
String hashedText = Convert.ToBase64String(hashedBytes); 

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