如何使用C＃实现AES算法 [英] How to implement AES algorithm using C#

问题描述

我必须将用户A的文件发送到服务器

我想要的是：

1.来自用户A文件将以加密方式共享给服务器表单

2.服务器将接收文件，解密并存储此文件。

3.此操作应使用非对称密钥加密概念执行。

4.为用户和服务器使用单独的GUI表格是有利的

任何人都可以帮我实现这个吗？



< b>我尝试过：

I have to send a file from User A to the server
What I want here is:
1. From user A file will be shared to server in encrypted form
2. server will receive the file, decrypt and store this file.
3. This action should perform using asymmetric key encryption concept.
4. It is advantageous to use separate GUI form for both user and server
Can anyone help me to implement this one?

What I have tried:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.OpenSsl;
using Org.BouncyCastle.Crypto.Generators;
using Org.BouncyCastle.Crypto.Encodings;
using Org.BouncyCastle.Crypto.Engines;


namespace Authentication_Check
{
    class Program
    {
        static void Main(string[] args)
        {
            // Declaring Variables //
            string SourceData;
            byte[] tmpSource;
            byte[] tmpHash;


            // Enter any Text //
            Console.WriteLine("Enter any Tetx");
            SourceData = Console.ReadLine();

            //Create a byte array from Source data
            tmpSource = ASCIIEncoding.ASCII.GetBytes(SourceData);
            Console.WriteLine();
            Console.WriteLine();
            Console.WriteLine(" Key pair is generating....Please wait for while");
            Console.WriteLine();


            //RSA key pair Generator generates the RSA kay pair based on the Random Number and the strength of key required 
            RsaKeyPairGenerator rsaKeyPairGenerator = new RsaKeyPairGenerator();
            rsaKeyPairGenerator.Init(new KeyGenerationParameters(new SecureRandom(), 2048));
            AsymmetricCipherKeyPair keyPair = rsaKeyPairGenerator.GenerateKeyPair();

            //Extracting the private key from the pair
            RsaKeyParameters privatekey = (RsaKeyParameters)keyPair.Private;
            RsaKeyParameters publickey = (RsaKeyParameters)keyPair.Public;

            //To print the public key in pem format
            TextWriter textWriter1 = new StringWriter();
            PemWriter pemWriter1 = new PemWriter(textWriter1);
            pemWriter1.WriteObject(publickey);
            pemWriter1.Writer.Flush();
            string print_publickey = textWriter1.ToString();
            Console.WriteLine("Public key is: {0}", print_publickey);
            Console.WriteLine();


            // Encryption Process
            IAsymmetricBlockCipher cipher = new OaepEncoding(new RsaEngine());
            cipher.Init(true, publickey);
            byte[] ciphertext = cipher.ProcessBlock(tmpSource, 0, tmpSource.Length);
            string result = Encoding.UTF8.GetString(ciphertext);
            Console.WriteLine("Encrypted text:");
            Console.WriteLine(result);
            Console.WriteLine();
            Console.WriteLine();

            Console.WriteLine("Do you want to decrypt the text? press 'Y' for yes and any other key key for no");
            char input = Console.ReadKey().KeyChar;

            if (input == 'Y' || input == 'y')
                Decryption(ciphertext, privatekey);
        }

        static void Decryption(byte[] ct, RsaKeyParameters pvtkey)
        {
            IAsymmetricBlockCipher Cipher1 = new OaepEncoding(new RsaEngine());
            Cipher1.Init(false, pvtkey);
            byte[] deciphered = Cipher1.ProcessBlock(ct, 0, ct.Length);
            string decipheredText = Encoding.UTF8.GetString(deciphered);
            Console.WriteLine();
            Console.WriteLine();

            Console.WriteLine("Decrypted Text:{0}", decipheredText);
            Console.WriteLine();
            Console.WriteLine();





        }





    }
}

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