c#加密解密

using System;

using System.Diagnostics;

using System.Security.Cryptography;

using System.Text;

using System.IO;

namespace CryptoUtil

{

/// <summary>

/// CryptoUtil 的摘要说明。

/// </summary>

public class CryptoUtil

{

//随机选8个字节既为密钥也为初始向量

Byte[] byKey64={42, 16, 93, 156, 78, 4, 218, 32};

Byte[] Iv64={55, 103, 246, 79, 36, 99, 167, 3};

Byte[] byKey192={42, 16, 93, 156, 78, 4, 218, 32,15, 167, 44, 80, 26, 250, 155, 112,2, 94, 11, 204, 119, 35, 184, 197};

Byte[] Iv192={55, 103, 246, 79, 36, 99, 167, 3,42, 5, 62, 83, 184, 7, 209, 13, 145, 23, 200, 58, 173, 10, 121, 222};

public CryptoUtil()

{

//

// TODO: 在此处添加构造函数逻辑

//

}

/// <summary>

/// 标准的DES加密

/// </summary>

/// <param name="str_Sql">标准的DES加密</param>

private String Encrypt(String strText)

{

//Byte[] byKey = {};

//Byte[] IV = {0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF};

try

{

//byKey = System.Text.Encoding.UTF8.GetBytes(strEncrKey.Substring(0, 8));

DESCryptoServiceProvider des = new DESCryptoServiceProvider();

Byte[] inputByteArray = Encoding.UTF8.GetBytes(strText);

MemoryStream ms = new MemoryStream();

CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey64, Iv64), CryptoStreamMode.Write);

cs.Write(inputByteArray, 0, inputByteArray.Length);

cs.FlushFinalBlock();

return Convert.ToBase64String(ms.ToArray());

}

catch(Exception ex)

{

return ex.Message;

}

}

/// <summary>

/// 标准的DES解密

/// </summary>

/// <param name="str_Sql">标准的DES解密</param>

private String Decrypt(String strText)

{

//Byte[] byKey = {};

//Byte[] IV = {0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF};

Byte[] inputByteArray = new byte[strText.Length];

try

{

//byKey = System.Text.Encoding.UTF8.GetBytes(sDecrKey.Substring(0, 8));

DESCryptoServiceProvider des = new DESCryptoServiceProvider();

inputByteArray = Convert.FromBase64String(strText);

MemoryStream ms = new MemoryStream();

CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey64, Iv64), CryptoStreamMode.Write);

cs.Write(inputByteArray, 0, inputByteArray.Length);

cs.FlushFinalBlock();

System.Text.Encoding encoding = System.Text.Encoding.UTF8;

return encoding.GetString(ms.ToArray());

}

catch(Exception ex)

{

return ex.Message;

}

}

}

}