.Net下的加密解密大全（6）：玩转非对称加密

    本博文来聊聊怎么玩转非对称加密吧，这里主要介绍.NET算法下的3种非对称加密算法：DSA,RSA,ECDsa。上两篇博文分别为Hash家族和非对称加密家族找到了lead，现在我们就为非对称加密技术找个合适的lead吧。

   首先创建一个接口：“IEncryptAndDecrypt”，然后为上面的3中算法分别创建3个实现类并让这些类实现接口“IEncryptAndDecrypt”。它们的情况如下图：

   这下我们把这些哥们都召集起来了，现在我们就给他们找一个lead：“EncryptAndDecryptInvoker”。以后我们要找这些非对称加密家族的哥们的时候就可以直接联系lead啦！来瞧瞧现在的队伍吧：

 看上去挺不错的，我们来看看咱们的lead是否能胜任它的工作吧：

EncryptAndDecryptInvoker lead;
            string data = "我们是非对称加密家族!";


            //执行环境
            CryptogramSetting setting = new CryptogramSetting();
            byte[] bData;//加密处理前
            byte[] aData;//机密处理后
            byte[] tmp;
            Encoding encoding = System.Text.Encoding.UTF8;
            sys_cryptography.DSA tmp_dsa = sys_cryptography.DSA.Create();
            string DSA_PublicKey = tmp_dsa.ToXmlString(false);
            string DSA_PrivateKey = tmp_dsa.ToXmlString(true);
            sys_cryptography.RSA tmp_rsa = sys_cryptography.RSA.Create();
            string RSA_PublicKey = tmp_rsa.ToXmlString(false);
            string RSA_PrivateKey = tmp_rsa.ToXmlString(true);
            sys_cryptography.ECDsa tmp_ecdsa = sys_cryptography.ECDsa.Create();
            string ECDsa_PublicKey = tmp_ecdsa.ToXmlString(false);
            string ECDsa_PrivateKey = tmp_ecdsa.ToXmlString(true);




            //DSA
            
            Hashtable dsaKey = new Hashtable();
            dsaKey["publickey"] = DSA_PublicKey;
            dsaKey["privatekey"] = DSA_PrivateKey;
            setting.CryptogramType = CryptogramType.UnsymmetryEncryptAndDecrypt;
            setting.PublicKeyAndPrivateKey = dsaKey;


            lead = new EncryptAndDecryptInvoker(new DSA(), setting);
            
            Console.WriteLine("DSA:");
            tmp = lead.Encrypt(encoding.GetBytes(data));
            Console.WriteLine("签名:"+Convert.ToBase64String(tmp));

            lead.SetVertifyData(encoding.GetBytes(data));//验证签名

            bool isOriginal = lead.Decrypt(tmp)[0] == 1 ? true : false ;

            Console.WriteLine("签名结果：" + isOriginal);



            //RSA
            Hashtable rsaKey = new Hashtable();
            rsaKey["publickey"] = RSA_PublicKey;
            rsaKey["privatekey"] = RSA_PrivateKey;
            setting.CryptogramType = CryptogramType.UnsymmetryEncryptAndDecrypt;
            setting.PublicKeyAndPrivateKey = rsaKey;

            lead = new EncryptAndDecryptInvoker(new RSA(), setting);
            Console.WriteLine("RSA:");
            tmp = lead.Encrypt(encoding.GetBytes(data));
            Console.WriteLine("加密：" + Convert.ToBase64String(tmp));
            tmp = lead.Decrypt(tmp);
            Console.WriteLine("解密：" + encoding.GetString(tmp));


            //ECDsa  问题：ECDsa不能到处公匙和私匙
            

            Hashtable ecdsaKey = new Hashtable();
            ecdsaKey["publickey"] = ECDsa_PublicKey;
            ecdsaKey["privatekey"] = ECDsa_PrivateKey;
            setting.CryptogramType = CryptogramType.UnsymmetryEncryptAndDecrypt;
            setting.PublicKeyAndPrivateKey = ecdsaKey;

            lead = new EncryptAndDecryptInvoker(new ECDsa(), setting);
            Console.WriteLine("ECDsa:");
            tmp = lead.Encrypt(encoding.GetBytes(data));
            Console.WriteLine("加密：" + Convert.ToBase64String(tmp));
            tmp = lead.Decrypt(tmp);
            Console.WriteLine("解密：" + encoding.GetString(tmp));



            Console.ReadKey();