获取字符串的SHA-256串 [英] Obtain SHA-256 string of a string

问题描述

我有一些字符串，我想用C＃的SHA-256散列函数散列它。我想是这样的：

I have some string and I want to hash it with the SHA-256 hash function using C#. I want something like this:

 string hashString = sha256_hash("samplestring");

是不是有什么内置的框架来做到这一点？

Is there something built into the framework to do this?

推荐答案

的实施可能会像

public static String sha256_hash(String value) {
  StringBuilder Sb = new StringBuilder();

  using (SHA256 hash = SHA256Managed.Create()) {
    Encoding enc = Encoding.UTF8;
    Byte[] result = hash.ComputeHash(enc.GetBytes(value));

    foreach (Byte b in result)
      Sb.Append(b.ToString("x2"));
  }

  return Sb.ToString();
}

编辑：LINQ实现，它是比较的简洁的，但是，很可能的的可读性的：

LINQ implementation which is more concise, but, probably, less readable:

public static String sha256_hash(String value) {
  using (SHA256 hash = SHA256Managed.Create()) {
    return String.Join("", hash
      .ComputeHash(Encoding.UTF8.GetBytes(value))
      .Select(item => item.ToString("x2")));
  }
} 

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