简介.Net框架下的各种加密解密算法

该文章将会不断的收入.net下的加密算法，这些算法将会采用策略模式来统一管理。

using System;
using System.Collections.Generic;
using System.Text;  

namespace EncryptAndDecrypt
{
   public class EncryptAndDecrytHandler
    {
        IEncrytAndDecrypt _EncryptAndDecrypt;
        public EncryptAndDecrytHandler(IEncrytAndDecrypt iencrytanddecrypt)
        {
            _EncryptAndDecrypt = iencrytanddecrypt;
        }
        public string Encrypt(string data)
        {
            return _EncryptAndDecrypt.Encrypt(data);
        }
        public string Decrypt(string data)
        {
            return _EncryptAndDecrypt.Decrypt(data);
        }
    }
}

加密解密的调用者

using System;
using System.Collections.Generic;
using System.Text;  

namespace EncryptAndDecrypt
{
    public interface IEncrytAndDecrypt
    {
       string Encrypt(string data);
       string Decrypt(string data);
    }
}

策略接口

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

namespace EncryptAndDecrypt
{
    public class DESCrypt:IEncrytAndDecrypt
    {
        private byte[] rgbKey = new byte[] { 1, 9, 8, 7, 0, 1, 0, 3 };
        private byte[] rgbIv = new byte[] { 1, 9, 8, 7, 0, 1, 0, 3 };
        #region IEncrytAndDecrypt 成员  

        public string Encrypt(string data)
        {
            MemoryStream mstream = new MemoryStream();
            DESCryptoServiceProvider deskey = new DESCryptoServiceProvider();
            CryptoStream cstream = new CryptoStream(mstream, deskey.CreateEncryptor(rgbKey,rgbIv), CryptoStreamMode.Write);
            StreamWriter sw = new StreamWriter(cstream);
            sw.WriteLine(data);
            sw.Close();
            cstream.Close();
            byte[] bytes = mstream.ToArray();
            mstream.Close();
            return Convert.ToBase64String(bytes);
        }  

        public string Decrypt(string data)
        {
            string tmp;
            MemoryStream mstream = new MemoryStream(Convert.FromBase64String(data));
            DESCryptoServiceProvider deskey = new DESCryptoServiceProvider();
            CryptoStream cstream = new CryptoStream(mstream, deskey.CreateDecryptor(rgbKey, rgbIv), CryptoStreamMode.Read);
            StreamReader sr = new StreamReader(cstream);
            tmp = sr.ReadLine();
            sr.Close();
            cstream.Close();
            mstream.Close();
            return tmp;
        }  

        #endregion
    }
}

DES加密算法

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

namespace EncryptAndDecrypt
{
   public class TripleDesCrypt:IEncrytAndDecrypt
    {
       private byte[] rgbKey;
       private byte[] rgbIv;
       public TripleDesCrypt()
       {
        rgbKey = new byte[130];
         rgbIv = new byte[130];
         for (int i = 0; i < 130; i++)
         {
             rgbKey[i] = rgbIv[i] = (byte)(new Random().Next(1, 255));
         }  

       }  

       #region IEncrytAndDecrypt 成员  

       public string Encrypt(string data)
        {
            TripleDESCryptoServiceProvider tripleDes=new TripleDESCryptoServiceProvider();  

            MemoryStream mstream = new MemoryStream();
            CryptoStream cstream = new CryptoStream(mstream, tripleDes.CreateEncryptor(rgbKey, rgbIv), CryptoStreamMode.Write);
            StreamWriter sw = new StreamWriter(cstream);
            sw.WriteLine(data);
            cstream.Close();
            byte[] result = mstream.ToArray();
            mstream.Close();
            return Convert.ToBase64String(result);  

        }  

        public string Decrypt(string data)
        {
            TripleDESCryptoServiceProvider tripleDes = new TripleDESCryptoServiceProvider();
            MemoryStream mstream = new MemoryStream(Convert.FromBase64String(data));
            CryptoStream cstream = new CryptoStream(mstream, tripleDes.CreateDecryptor(rgbKey, rgbIv), CryptoStreamMode.Read);
            StreamReader sr = new StreamReader(cstream);
            string result = sr.ReadLine();
            sr.Close();
            cstream.Close();
            mstream.Close();
            return result;
        }  

        #endregion
    }
}

TripleDES加密算法

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