C# 实现 AES 加密算法

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代码

命名空间 System.Security.Cryptography

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public enum enmKeyBit {     KeyBit128 = 128,     KeyBit192 = 192,     KeyBit256 = 256, }   public class EncryptNew {     /// <summary>     /// AES ECB模式 加密     /// </summary>     /// <param name="data">明文</param>     /// <param name="key">密钥</param>     /// <param name="keyBit">密钥位数</param>     /// <returns></returns>     public static string AESEncrypt(String data, String key, enmKeyBit keyBit = enmKeyBit.KeyBit256)     {         if (string.IsNullOrEmpty(data))         {             return string.Empty;         }           try         {             int intKeyBit = (int)keyBit;             RijndaelManaged aes = new RijndaelManaged();             byte[] bytsData = Encoding.UTF8.GetBytes(data);             byte[] bytsKey = new Byte[intKeyBit / 8];             Array.Copy(Encoding.UTF8.GetBytes(key.PadRight(bytsKey.Length)), bytsKey, bytsKey.Length);               aes.Mode = CipherMode.ECB;             aes.Padding = PaddingMode.PKCS7;             aes.KeySize = intKeyBit;             aes.Key = bytsKey;             //aes.IV = iv;             ICryptoTransform ctf = aes.CreateEncryptor();             byte[] bytsResult = ctf.TransformFinalBlock(bytsData, 0, bytsData.Length);               return Convert.ToBase64String(bytsResult);         }         catch         {             return string.Empty;         }     }       /// <summary>     /// AES ECB模式 解密     /// </summary>     /// <param name="data">密文</param>     /// <param name="key">密钥</param>     /// <param name="keyBit">密钥位数</param>     /// <returns></returns>     public static string AESDecrypt(String data, String key, enmKeyBit keyBit = enmKeyBit.KeyBit256)     {         if (string.IsNullOrEmpty(data))         {             return string.Empty;         }           try         {             int intKeyBit = (int)keyBit;             RijndaelManaged aes = new RijndaelManaged();             byte[] bytsData = Convert.FromBase64String(data);             byte[] bytsKey = new Byte[intKeyBit / 8];             Array.Copy(Encoding.UTF8.GetBytes(key.PadRight(bytsKey.Length)), bytsKey, bytsKey.Length);               aes.Mode = CipherMode.ECB;             aes.Padding = PaddingMode.PKCS7;             aes.KeySize = intKeyBit;             aes.Key = bytsKey;             //aes.IV = iv;               ICryptoTransform ctf = aes.CreateDecryptor();             byte[] bytsResult = ctf.TransformFinalBlock(bytsData, 0, bytsData.Length);               return UTF8Encoding.UTF8.GetString(bytsResult);         }         catch         {             return string.Empty;         }     } }