C#如何实现缓冲区的加密和解密

在C#中实现缓冲区的加密和解密可以使用.NET框架提供的加密算法。以下是一个示例代码，演示如何使用AES算法对缓冲区进行加密和解密：

using System; using System.Security.Cryptography; using System.Text;  public class EncryptionHelper {     private const string key = "1234567890123456";     private const string iv = "1234567890123456";      public static byte[] Encrypt(byte[] buffer)     {         using (Aes aes = Aes.Create())         {             aes.Key = Encoding.UTF8.GetBytes(key);             aes.IV = Encoding.UTF8.GetBytes(iv);              using (ICryptoTransform encryptor = aes.CreateEncryptor(aes.Key, aes.IV))             {                 return PerformCryptography(buffer, encryptor);             }         }     }      public static byte[] Decrypt(byte[] buffer)     {         using (Aes aes = Aes.Create())         {             aes.Key = Encoding.UTF8.GetBytes(key);             aes.IV = Encoding.UTF8.GetBytes(iv);              using (ICryptoTransform decryptor = aes.CreateDecryptor(aes.Key, aes.IV))             {                 return PerformCryptography(buffer, decryptor);             }         }     }      private static byte[] PerformCryptography(byte[] buffer, ICryptoTransform transform)     {         using (MemoryStream memoryStream = new MemoryStream())         {             using (CryptoStream cryptoStream = new CryptoStream(memoryStream, transform, CryptoStreamMode.Write))             {                 cryptoStream.Write(buffer, 0, buffer.Length);             }              return memoryStream.ToArray();         }     } } 

在上面的代码中，Encrypt方法接收一个要加密的字节数组，并使用AES算法加密它。Decrypt方法用于解密加密后的字节数组。PerformCryptography方法用于实际执行加密或解密操作。

请注意，为了简化示例，上述代码中使用了固定的密钥和初始化向量。在实际应用中，密钥和初始化向量应该更为安全，并根据需要进行动态生成和管理。