使用C#对数据库链接进行加密和解密的核心代码

问：如何使用C#编写对数据库链接进行加密和解密的核心代码？

南京北大青鸟柴老师：这位同学的问题问的很好，因为如果直接把数据库连接字符串写在程序里远程数据库，那么将会非常的不安全，常常导致网站或软件被黑等情况
下面展示一下使用C#对数据库链接进行加密和解密的操作

首先我们需要一个工具类，示例代码如下

using System;

using System.IO;

using System.Security.Cryptography;

namespace CryptInfoNameSpace

{

class CryptInfo

{

//加密

public static string Encrypt(string text)

{

Rijndael crypt=Rijndael.Create();

byte[] key=new byte[32]{0XA6,0X7D,0XE1,0X3F,0X35,0X0E,0XE1,0XA9,0X83,0XA5,0X62,0XAA,0X7A,0XAE,0X79,0X98,

0XA7,0X33,0X49,0XFF,0XE6,0XAE,0XBF,0X8D,0X8D,0X20,0X8A,0X49,0X31,0X3A,0X12,0X40};

byte[] iv=new byte[16]{0XF8,0X8B,0X01,0XFB,0X08,0X85,0X9A,0XA4,0XBE,0X45,0X28,0X56,0X03,0X42,0XF6,0X19};

crypt.Key=key;

crypt.IV=iv;

MemoryStream ms=new MemoryStream();

ICryptoTransform transformEncode=new ToBase64Transform();

//Base64编码

CryptoStream csEncode=new CryptoStream(ms,transformEncode,CryptoStreamMode.Write);

CryptoStream csEncrypt=new CryptoStream(csEncode,crypt.CreateEncryptor(),CryptoStreamMode.Write);

System.Text.UTF8Encoding enc=new System.Text.UTF8Encoding();

byte[] rawData=enc.GetBytes(text);

csEncrypt.Write(rawData,0,rawData.Length);

csEncrypt.FlushFinalBlock();

byte[] encryptedData=new byte[ms.Length];

ms.Position=0;

ms.Read(encryptedData,0,(int)ms.Length);

return enc.GetString(encryptedData);

}

//解密，加密解密中的 byte[] key，byte[] iv可以自行修改，加密解密的数组值一定一致，否则无法对应加密解密。

public static string Decrypt(string text)

{

Rijndael crypt=Rijndael.Create();

byte[] key=new byte[32]{0XA6,0X7D,0XE1,0X3F,0X35,0X0E,0XE1,0XA9,0X83,0XA5,0X62,0XAA,0X7A,0XAE,0X79,0X98,

0XA7,0X33,0X49,0XFF,0XE6,0XAE,0XBF,0X8D,0X8D,0X20,0X8A,0X49,0X31,0X3A,0X12,0X40};

byte[] iv=new byte[16]{0XF8,0X8B,0X01,0XFB,0X08,0X85,0X9A,0XA4,0XBE,0X45,0X28,0X56,0X03,0X42,0XF6,0X19};

crypt.Key=key;