是否有一个键控SHA256散列算法是FIPS兼容的。NET？

我创建使用HMACSHA256用下面的代码键控SHA256哈希值：

I am creating a keyed SHA256 hash using HMACSHA256 with the following code:

HMACSHA256 hmac = new HMACSHA256(Encoding.UTF8.GetBytes(secretKey);
byte[] hash = hmac.ComputeHash(Encoding.UTF8.GetBytes(data));

string hashResult = string.Empty;
for (int i = 0; i < hash.Length; i++)
{
    hashResult += hash[i].ToString("x2"); // hex format
}

这是工作得很好，但是，它在使环境中的FIPS失败，因为HMACSHA256采用了底层SHA256Managed实现，它是本身不符合FIPS。

This is working just fine, however, it fails in a FIPS enabled environment because HMACSHA256 uses an underlying SHA256Managed implementation which is itself not FIPS compliant.

通过MSDN文档搜索我发现KeyedHashAlgorithm的唯一SHA256实现HMACSHA256。

Searching through MSDN documentation I find that the only SHA256 implementation of KeyedHashAlgorithm is HMACSHA256.

我需要签署Web服务请求，键控SHA256哈希（所以我不能改变散列式），我必须能够在启用环境FIPS运行。

I am required to sign web service requests with a keyed SHA256 hash (so I can't change the hash type), and I must be able to run in a FIPS enabled environment.

谷歌搜索显示，SHA256CryptoServiceProvider和SHA256Cng都是符合FIPS的方法来创建SHA256哈希，但也似乎支持键控散列的创建。

Googling shows that both SHA256CryptoServiceProvider and SHA256Cng are FIPS compliant ways to create SHA256 hashes, but neither seem to support the creation of keyed hashes.