TripleDES加密、解密算法

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Security.Cryptography;

using System.IO;

namespace WindowsFormsApplication1

{

    #region TripleDES算法



    public class ClassTripleDES

    {

        public ClassTripleDES()

        {

        }



        //加密，使用密碼產生加密算法的公鑰，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，使用密碼產生加密算法的公鑰，並使用TripleDES對加密數據進行解密。

        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，使用密碼產生加密算法的公鑰，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，使用密碼產生加密算法的公鑰，並使用TripleDES對加密數據進行解密。

        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

}