.Net下的加密解密大全（5）：玩转对称加密

    上篇博文介绍了怎么玩转Hash算法，不过那篇文章没有交代清楚。这篇博文我将力争将那些没交代清楚的东东都说明白了。当然本文的主题是玩转对称加密。

    .NET下的对称加密技术主要有这么几种：DES，AES，Rijndael，TripleDES（3DES）。现在就来玩转它们吧！与上篇博文一样，首先创建一个接口：“IEncryptAndDecrypt”，然后为DES,AES,Rijnael,TripleDES(3DES)建立对应的类并实现接口“IEncryptAndDecrypt”。它们的结果如下图：

    这样我们在后期的编程中只需要简单的调用接口IEncryptAndDecrypt中的方法“Encrypt”和“Decrypt”就可以对数据进行加密解密啦。当然要实现这样的愿望我们还得继续努力，当前我的目标就是为它们找一个合格的lead，这样我们如果要找DES干活就可以直接对lead说，而不用满世界的去找咱们的DES。来瞧瞧咱们的Lead吧：

咱们来瞧瞧这个Lead的能耐吧，看看它是否能胜任它的工作：

            EncryptAndDecryptInvoker leader;// = new EncryptAndDecryptInvoker(null, null);
            
            
            //执行环境
            CryptogramSetting setting = new CryptogramSetting() { };
            string data="快去干活";
            byte[] bData;//加密处理前
            byte[] aData;//机密处理后
            byte[] tmp;
            Encoding encoding=System.Text.Encoding.UTF8;



            //叫DES干活
            IEncrytAndDecrypt myDES = new DES();
            setting.IV = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
            setting.Key = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
            setting.CryptogramType = CryptogramType.SymmetryEncryptAndDecrypt;
            //给lead发送要求
            leader = new EncryptAndDecryptInvoker(myDES, setting);
           
            Console.WriteLine("DES:");
            tmp=leader.Encrypt(encoding.GetBytes(data));
            Console.WriteLine("加密："+Convert.ToBase64String(tmp));
            tmp = leader.Decrypt(tmp);
            Console.WriteLine("解密：" + encoding.GetString(tmp));






            //叫AES干活
            IEncrytAndDecrypt myAES = new AES();
            setting.IV = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8,9,10,11,12,13,14,15,16 };
            setting.Key = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 ,9,10,11,12,13,14,15,16};
            setting.CryptogramType = CryptogramType.SymmetryEncryptAndDecrypt;
            //给lead发送要求
            leader = new EncryptAndDecryptInvoker(myAES, setting);

            Console.WriteLine("AES:");
            tmp = leader.Encrypt(encoding.GetBytes(data));
            Console.WriteLine("加密：" + Convert.ToBase64String(tmp));
            tmp = leader.Decrypt(tmp);
            Console.WriteLine("解密：" + encoding.GetString(tmp));
            
            
            
            
            
            
            
            
            //叫Rijndael干活
            IEncrytAndDecrypt myRijndael = new Rijndael();
            setting.IV = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
            setting.Key = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
            setting.CryptogramType = CryptogramType.SymmetryEncryptAndDecrypt;
            //给lead发送要求
            leader = new EncryptAndDecryptInvoker(myRijndael, setting);

            Console.WriteLine("Rijndael:");
            tmp = leader.Encrypt(encoding.GetBytes(data));
            Console.WriteLine("加密：" + Convert.ToBase64String(tmp));
            tmp = leader.Decrypt(tmp);
            Console.WriteLine("解密：" + encoding.GetString(tmp));


            //叫3DES干活
            IEncrytAndDecrypt my3DES = new TripleDES();
            setting.IV = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
            setting.Key = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
            setting.CryptogramType = CryptogramType.SymmetryEncryptAndDecrypt;
            //给lead发送要求
            leader = new EncryptAndDecryptInvoker(my3DES, setting);

            Console.WriteLine("3DES:");
            tmp = leader.Encrypt(encoding.GetBytes(data));
            Console.WriteLine("加密：" + Convert.ToBase64String(tmp));
            tmp = leader.Decrypt(tmp);
            Console.WriteLine("解密：" + encoding.GetString(tmp));


            Console.ReadKey();

    看来我们的lead还是很给力的嘛，完全胜任了它的操作。