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      1. 如何在 .NET 中加密字符串?

        How to encrypt a string in .NET?(如何在 .NET 中加密字符串?)

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                  本文介紹了如何在 .NET 中加密字符串?的處理方法,對大家解決問題具有一定的參考價值,需要的朋友們下面隨著小編來一起學習吧!

                  問題描述

                  限時送ChatGPT賬號..

                  我必須加密/解密 Xml 文件中的一些敏感信息?是的,我可以通過編寫自己的自定義算法來做到這一點.我想知道 .NET 中是否已經有內置方法可以做到這一點,以及我總是需要注意哪些方面..

                  I have to encrypt/decrypt some sensitive information in a Xml file? Yes I can do that by writing my own custom algorithms. I am wondering if there is already a built in way in .NET to do that and also what points I always need to take care..

                  推薦答案

                  下面是幾個使用 .NET 框架加密和解密字符串的函數:

                  Here's a couple of functions that use the .NET framework to encrypt and decrypt a string:

                  public string EncryptString(string plainText)
                  {
                      // Instantiate a new RijndaelManaged object to perform string symmetric encryption
                      RijndaelManaged rijndaelCipher = new RijndaelManaged();
                  
                      // Set key and IV
                      rijndaelCipher.Key = Convert.FromBase64String("ABC");
                      rijndaelCipher.IV = Convert.FromBase64String("123");
                  
                      // Instantiate a new MemoryStream object to contain the encrypted bytes
                      MemoryStream memoryStream = new MemoryStream();
                  
                      // Instantiate a new encryptor from our RijndaelManaged object
                      ICryptoTransform rijndaelEncryptor = rijndaelCipher.CreateEncryptor();
                  
                      // Instantiate a new CryptoStream object to process the data and write it to the 
                      // memory stream
                      CryptoStream cryptoStream = new CryptoStream(memoryStream, rijndaelEncryptor, CryptoStreamMode.Write);
                  
                      // Convert the plainText string into a byte array
                      byte[] plainBytes = Encoding.ASCII.GetBytes(plainText);
                  
                      // Encrypt the input plaintext string
                      cryptoStream.Write(plainBytes, 0, plainBytes.Length);
                  
                      // Complete the encryption process
                      cryptoStream.FlushFinalBlock();
                  
                      // Convert the encrypted data from a MemoryStream to a byte array
                      byte[] cipherBytes = memoryStream.ToArray();
                  
                      // Close both the MemoryStream and the CryptoStream
                      memoryStream.Close();
                      cryptoStream.Close();
                  
                      // Convert the encrypted byte array to a base64 encoded string
                      string cipherText = Convert.ToBase64String(cipherBytes, 0, cipherBytes.Length);
                  
                      // Return the encrypted data as a string
                      return cipherText;
                  }
                  
                  
                  public string DecryptString(string cipherText)
                  {
                      // Instantiate a new RijndaelManaged object to perform string symmetric encryption
                      RijndaelManaged rijndaelCipher = new RijndaelManaged();
                  
                      // Set key and IV
                      rijndaelCipher.Key = Convert.FromBase64String("ABC");
                      rijndaelCipher.IV = Convert.FromBase64String("123");
                  
                      // Instantiate a new MemoryStream object to contain the encrypted bytes
                      MemoryStream memoryStream = new MemoryStream();
                  
                      // Instantiate a new encryptor from our RijndaelManaged object
                      ICryptoTransform rijndaelDecryptor = rijndaelCipher.CreateDecryptor();
                  
                      // Instantiate a new CryptoStream object to process the data and write it to the 
                      // memory stream
                      CryptoStream cryptoStream = new CryptoStream(memoryStream, rijndaelDecryptor, CryptoStreamMode.Write);
                  
                      // Will contain decrypted plaintext
                      string plainText = String.Empty;
                  
                      try
                      {
                          // Convert the ciphertext string into a byte array
                          byte[] cipherBytes = Convert.FromBase64String(cipherText);
                  
                          // Decrypt the input ciphertext string
                          cryptoStream.Write(cipherBytes, 0, cipherBytes.Length);
                  
                          // Complete the decryption process
                          cryptoStream.FlushFinalBlock();
                  
                          // Convert the decrypted data from a MemoryStream to a byte array
                          byte[] plainBytes = memoryStream.ToArray();
                  
                          // Convert the encrypted byte array to a base64 encoded string
                          plainText = Encoding.ASCII.GetString(plainBytes, 0, plainBytes.Length);
                      }
                      finally
                      {
                          // Close both the MemoryStream and the CryptoStream
                          memoryStream.Close();
                          cryptoStream.Close();
                      }
                  
                      // Return the encrypted data as a string
                      return plainText;
                  }
                  

                  當然,我不建議像這樣對密鑰和初始化向量進行硬編碼 :)

                  Of course I don't advise hardcoding the key and initialisation vector like this :)

                  這篇關于如何在 .NET 中加密字符串?的文章就介紹到這了,希望我們推薦的答案對大家有所幫助,也希望大家多多支持html5模板網!

                  【網站聲明】本站部分內容來源于互聯網,旨在幫助大家更快的解決問題,如果有圖片或者內容侵犯了您的權益,請聯系我們刪除處理,感謝您的支持!

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