Detailed. NET encryption and decryption algorithm (6) play the Asymmetric encryption

Ben Bovinlai chat How to play asymmetric encryption bar, here is mainly introduced. NET algorithm, 3 kinds of asymmetric encryption algorithms: DSA,RSA,ECDSA. The two blog posts have found the lead for the hash family and the asymmetric encryption family, so let's find the right lead for asymmetric cryptography.

First create an interface: "Iencryptanddecrypt", and then create 3 implementation classes for the above 3 algorithm and let these classes implement the interface "Iencryptanddecrypt". They are in the following picture:

Now that we've got these guys together, we're going to find them a lead: "Encryptanddecryptinvoker." We'll be able to contact the lead directly when we're looking for these asymmetric encryption family buddies. Let's see the team now:

It looks pretty good, let's see if our lead is up to its work:

Encryptanddecryptinvoker lead;  

            String data = "We are asymmetric encryption family!";  
            Execution Environment cryptogramsetting setting = new cryptogramsetting ();  
            Byte[] bdata;//after the encryption processing byte[] adata;//confidential processing 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 ("Signature:" +convert.tobase64string (TMP)); Lead. Setvertifydata (encoding. GetBytes (data))//verify signature bool isoriginal = lead. Decrypt (TMP) [0] = = 1?  
      
            True:false;  

            Console.WriteLine ("Signature Result:" + 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 ("Encryption:" + convert.tobase64string (TMP)); TMP = lead.  
            Decrypt (TMP); Console.WriteLine ("Decrypt:" + encoding.)  
      
      
            GetString (TMP));  
            ECDsa problem: ECDsa can not be everywhere public key and private key 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 ("Encryption:" + convert.tobase64string (TMP)); TMP = lead.  
            Decrypt (TMP); Console.WriteLine ("Decrypt:" + encoding.)  

            GetString (TMP)); Console.readkey ();