c# AES加解密并转ASCII码

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
 
namespace AESDecryptDemo
{
   public class AES
    {
       public static string AESEncryptASCII(string plainStr)
       {
           StringBuilder sb = new StringBuilder();
           byte[] bKey = Encoding.UTF8.GetBytes(GetKey());
           byte[] bIV = Encoding.UTF8.GetBytes(GetIV());
           byte[] byteArray = Encoding.UTF8.GetBytes(plainStr);
 
           string encrypt = null;
           Rijndael aes = Rijndael.Create();
           using (MemoryStream mStream = new MemoryStream())
           {
               using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateEncryptor(bKey, bIV), CryptoStreamMode.Write))
               {
                   cStream.Write(byteArray, 0, byteArray.Length);
                   cStream.FlushFinalBlock();
                   encrypt = Encode(Convert.ToBase64String(mStream.ToArray()));
               }
           }
           aes.Clear();
           return encrypt;
       }
       public static string AESEncrypt(string plainStr)
       {
           StringBuilder sb = new StringBuilder();
           byte[] bKey = Encoding.UTF8.GetBytes(GetKey());
           byte[] bIV = Encoding.UTF8.GetBytes(GetIV());
           byte[] byteArray = Encoding.UTF8.GetBytes(plainStr);
 
           string encrypt = null;
           Rijndael aes = Rijndael.Create();
           using (MemoryStream mStream = new MemoryStream())
           {
               using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateEncryptor(bKey, bIV), CryptoStreamMode.Write))
               {
                   cStream.Write(byteArray, 0, byteArray.Length);
                   cStream.FlushFinalBlock();
                   encrypt = Convert.ToBase64String(mStream.ToArray());
               }
           }
           aes.Clear();
           return encrypt;
       }
       public static string AESDecryptASCII(string encryptStr)
       {
           encryptStr = Decode(encryptStr);
           byte[] bKey = Encoding.UTF8.GetBytes(GetKey());
           byte[] bIV = Encoding.UTF8.GetBytes(GetIV());
           byte[] byteArray = Convert.FromBase64String(encryptStr);
 
           string decrypt = null;
           Rijndael aes = Rijndael.Create();
           using (MemoryStream mStream = new MemoryStream())
           {
               using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateDecryptor(bKey, bIV), CryptoStreamMode.Write))
               {
                   cStream.Write(byteArray, 0, byteArray.Length);
                   cStream.FlushFinalBlock();
                   decrypt = Encoding.UTF8.GetString(mStream.ToArray());
               }
           }
           aes.Clear();
           return decrypt;
       }
       public static string AESDecrypt(string encryptStr)
       {
           byte[] bKey = Encoding.UTF8.GetBytes(GetKey());
           byte[] bIV = Encoding.UTF8.GetBytes(GetIV());
           byte[] byteArray = Convert.FromBase64String(encryptStr);
 
           string decrypt = null;
           Rijndael aes = Rijndael.Create();
           using (MemoryStream mStream = new MemoryStream())
           {
               using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateDecryptor(bKey, bIV), CryptoStreamMode.Write))
               {
                   cStream.Write(byteArray, 0, byteArray.Length);
                   cStream.FlushFinalBlock();
                   decrypt = Encoding.UTF8.GetString(mStream.ToArray());
               }
           }
           aes.Clear();
           return decrypt;
       }
       public static string Encode(string strEncode)
       {
           string strReturn = "";//  存储转换后的编码
           foreach (short shortx in strEncode.ToCharArray())
           {
               strReturn += shortx.ToString("X");
           }
           return strReturn;
       }
 
       public static string Decode(string strDecode)
       {
           string sResult = "";
           for (int i = 0; i < strDecode.Length / 2; i++)
           {
               sResult += (char)short.Parse(strDecode.Substring(i * 2, 2), global::System.Globalization.NumberStyles.HexNumber);
           }
           return sResult;
       }
       private static string GetKey()
       {
           return @")O[NB]6,YF}+efcaj{+oESb9d8>Z'e9M";
       }
 
       /// <summary>
       /// 获取向量
       /// </summary>
       private static string GetIV()
       {
           return @"L+\~f4,Ir)b$=pkf";
       }
    }
}