您的位置：首页 > 其它

TripleDES加密、解密算法

2008-11-28 09:31 357 查看

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;
using System.IO;

namespace WindowsFormsApplication1
{
#region TripleDES算法

public class ClassTripleDES
{
public ClassTripleDES()
{
}

//加密，使用密码产生加密算法的公钥，并使用TripleDES对密码进行加密。
public static string Encrypt(string pass)
{
try
{
byte[] bt = (new System.Text.UnicodeEncoding()).GetBytes(pass);
PasswordDeriveBytes pdb = new PasswordDeriveBytes(pass, null);
byte[] key = pdb.GetBytes(24);
byte[] iv = pdb.GetBytes(8);
MemoryStream ms = new MemoryStream();
TripleDESCryptoServiceProvider tdesc = new TripleDESCryptoServiceProvider();
CryptoStream cs = new CryptoStream(ms, tdesc.CreateEncryptor(key, iv),
CryptoStreamMode.Write);
cs.Write(bt, 0, bt.Length);
cs.FlushFinalBlock();
return Convert.ToBase64String(ms.ToArray());
}
catch (Exception ex)
{
throw ex;
}
}

//解密，使用密码产生加密算法的公钥，并使用TripleDES对加密数据进行解密。

public static string Decrypt(string str, string pass)
{
try
{
byte[] bt = Convert.FromBase64String(str);
PasswordDeriveBytes pdb = new PasswordDeriveBytes(pass, null);
byte[] key = pdb.GetBytes(24);
byte[] iv = pdb.GetBytes(8);
MemoryStream ms = new MemoryStream();
TripleDESCryptoServiceProvider tdesc = new TripleDESCryptoServiceProvider();
CryptoStream cs = new CryptoStream(ms, tdesc.CreateDecryptor(key, iv),
CryptoStreamMode.Write);
cs.Write(bt, 0, bt.Length);
cs.FlushFinalBlock();
return (new System.Text.UnicodeEncoding()).GetString(ms.ToArray());
}
catch (Exception ex)
{
throw ex;
}
}

//使用：
//string str = Encrypt("bbb");
//Console.WriteLine(Decrypt(str, "bbb"));

//加密，使用密码产生加密算法的公钥，并使用TripleDES对密码进行加密。

public static string EncryptWithKey(string pass, string p_key)
{
try
{
byte[] bt = (new System.Text.UnicodeEncoding()).GetBytes(pass);
PasswordDeriveBytes pdb = new PasswordDeriveBytes(p_key, null);
byte[] key = pdb.GetBytes(24);
byte[] iv = pdb.GetBytes(8);
MemoryStream ms = new MemoryStream();
TripleDESCryptoServiceProvider tdesc = new TripleDESCryptoServiceProvider();
CryptoStream cs = new CryptoStream(ms, tdesc.CreateEncryptor(key, iv),
CryptoStreamMode.Write);
cs.Write(bt, 0, bt.Length);
cs.FlushFinalBlock();
return Convert.ToBase64String(ms.ToArray());
}
catch (Exception ex)
{
throw ex;
}
}

//解密，使用密码产生加密算法的公钥，并使用TripleDES对加密数据进行解密。

public static string DecryptWithKey(string str, string p_key)
{
try
{
byte[] bt = Convert.FromBase64String(str);
PasswordDeriveBytes pdb = new PasswordDeriveBytes(p_key, null);
byte[] key = pdb.GetBytes(24);
byte[] iv = pdb.GetBytes(8);
MemoryStream ms = new MemoryStream();
TripleDESCryptoServiceProvider tdesc = new TripleDESCryptoServiceProvider();
CryptoStream cs = new CryptoStream(ms, tdesc.CreateDecryptor(key, iv),
CryptoStreamMode.Write);
cs.Write(bt, 0, bt.Length);
cs.FlushFinalBlock();
return (new System.Text.UnicodeEncoding()).GetString(ms.ToArray());
}
catch (Exception ex)
{
throw ex;
}
}
}
#endregion

内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理

标签：

相关文章推荐

新的分享

章节导航