从SHA256解密 [英] Decrypt from SHA256

问题描述

  public static string Sha256encrypt（string phrase）
 {
 UTF8Encoding encoder = new UTF8Encoding（）; 
 SHA256Managed sha256hasher = new SHA256Managed（）; 
 byte [] hashedDataBytes = sha256hasher.ComputeHash（encoder.GetBytes（phrase））; 
 return Convert.ToBase64String（hashedDataBytes）; 
} 
  

如何解密我的密码在另一边？

解决方案

您无法解密单向哈希。您应该做的是将输入的密码的哈希与数据库中存储的哈希进行比较。

示例：

  var password =1234; 
 var hashedPassword = Sha256encrypt（password）; 
 
 var allowLogin = hashedPassword == storedPassword; // dataPassword from数据库等
  

这只是非常基础的，当使用散列算法时应考虑使用 Salt 。

I have that code to encrypt string to sha256 and next to base64:

 public static string Sha256encrypt(string phrase)
    {
        UTF8Encoding encoder = new UTF8Encoding();
        SHA256Managed sha256hasher = new SHA256Managed();
        byte[] hashedDataBytes = sha256hasher.ComputeHash(encoder.GetBytes(phrase));
        return Convert.ToBase64String(hashedDataBytes);
    }

How can I decrypt my password in other side?

解决方案

You cannot decrypt the result of a One Way Hash. What you should do instead is compare a hash of the entered password versus the stored hash in the database.

Example:

var password = "1234";
var hashedPassword = Sha256encrypt(password);

var allowLogin = hashedPassword == storedPassword; //storedPassword from Database, etc.

This is only the very basics though, when using hashing algorithms you should consider using a Salt too.

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