asp.net TripleDES加密、解密演算法

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Security.Cryptography;

using System.IO;

namespace WindowsFormsApplication1

{

#region TripleDES演算法

public class ClassTripleDES

{

public ClassTripleDES()

{

}

//加密，使用密碼產生密碼編譯演算法的公開金鑰，並使用TripleDES對密碼進行加密。

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，使用密碼產生密碼編譯演算法的公開金鑰，並使用TripleDES對加密資料進行解密。

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，使用密碼產生密碼編譯演算法的公開金鑰，並使用TripleDES對密碼進行加密。

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，使用密碼產生密碼編譯演算法的公開金鑰，並使用TripleDES對加密資料進行解密。

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

}