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AES加密解密(根据指定秘钥)

最近在做调用第三方接口,要求入参AES加密,并且秘钥为16位的长度,在此记录一下。

首先引用命名空间:

using System.IO;

using System.Text;

using System.Security.Cryptography;

 1  /// <summary>  2         /// AES加密(无向量)  3         /// </summary>  4         /// <param name="plainBytes">被加密的明文</param>  5         /// <param name="key">密钥</param>  6         /// <returns>密文</returns>  7         public  string AESEncrypt(string Data, string Key)  8         {  9             MemoryStream mStream = new MemoryStream(); 10             RijndaelManaged aes = new RijndaelManaged(); 11  12             byte[] plainBytes = Encoding.UTF8.GetBytes(Data); 13             Byte[] bKey = new Byte[16]; 14             Array.Copy(Encoding.UTF8.GetBytes(Key.PadRight(bKey.Length)), bKey, bKey.Length); 15  16             aes.Mode = CipherMode.ECB; 17             aes.Padding = PaddingMode.PKCS7; 18             aes.KeySize = 128; 19             //aes.Key = _key; 20             aes.Key = bKey; 21             //aes.IV = _iV; 22             CryptoStream cryptoStream = new CryptoStream(mStream, aes.CreateEncryptor(), CryptoStreamMode.Write); 23             try 24             { 25                 cryptoStream.Write(plainBytes, 0, plainBytes.Length); 26                 cryptoStream.FlushFinalBlock(); 27                 return Convert.ToBase64String(mStream.ToArray()); 28             } 29             finally 30             { 31                 cryptoStream.Close(); 32                 mStream.Close(); 33                 aes.Clear(); 34             } 35         }

 1  #region 解密  2         /// <summary>  3         /// AES解密(无向量)  4         /// </summary>  5         /// <param name="encryptedBytes">被加密的明文</param>  6         /// <param name="key">密钥</param>  7         /// <returns>明文</returns>  8         public  string AESDecrypt(String Data, String Key)  9         { 10             Byte[] encryptedBytes = Convert.FromBase64String(Data); 11             Byte[] bKey = new Byte[16]; 12             Array.Copy(Encoding.UTF8.GetBytes(Key.PadRight(bKey.Length)), bKey, bKey.Length); 13  14             MemoryStream mStream = new MemoryStream(encryptedBytes); 15             //mStream.Write( encryptedBytes, 0, encryptedBytes.Length ); 16             //mStream.Seek( 0, SeekOrigin.Begin ); 17             RijndaelManaged aes = new RijndaelManaged(); 18             aes.Mode = CipherMode.ECB; 19             aes.Padding = PaddingMode.PKCS7; 20             aes.KeySize = 128; 21             aes.Key = bKey; 22             //aes.IV = _iV; 23             CryptoStream cryptoStream = new CryptoStream(mStream, aes.CreateDecryptor(), CryptoStreamMode.Read); 24             try 25             { 26                 byte[] tmp = new byte[encryptedBytes.Length + 32]; 27                 int len = cryptoStream.Read(tmp, 0, encryptedBytes.Length + 32); 28                 byte[] ret = new byte[len]; 29                 Array.Copy(tmp, 0, ret, 0, len); 30                 return Encoding.UTF8.GetString(ret); 31             } 32             finally 33             { 34                 cryptoStream.Close(); 35                 mStream.Close(); 36                 aes.Clear(); 37             } 38         } 39         #endregion

调用时:string sendData = publicSH.AESDecrypt(sendData, "HYYSIENDEUFHVKDA");//返回信息解密 sendData 为要加密或者解密的信息 ,第二个参数是16位的秘钥



 

 

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