consolidate all repos to one for archive

semester_3/racunalniska_omrezja/naloga_4/Client/Client.cs

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+using System.Net;
+using System.Net.Sockets;
+using System.Text;
+using System.Security.Cryptography;
+using System.Reflection.Metadata;
+using System;
+
+namespace Naloga {
+    class Client
+    {
+        const int STD_PORT = 1234;
+        const string STD_IP = "127.0.0.1";
+        const int STD_BUFF = 256;
+        static void Main()
+        {
+          
+            TcpClient client = new TcpClient();
+            client.Connect(IPAddress.Parse(STD_IP), STD_PORT);
+            NetworkStream tcpStream = client.GetStream();
+
+            byte[] bytes = new byte[STD_BUFF];
+            int lenght = tcpStream.Read(bytes, 0, bytes.Length);
+            int bufferCount = BitConverter.ToInt32(bytes,0);
+
+            using (ECDiffieHellmanCng eCDiffieHellmanCng = new ECDiffieHellmanCng())
+            {
+
+                eCDiffieHellmanCng.KeyDerivationFunction = ECDiffieHellmanKeyDerivationFunction.Hash;
+                eCDiffieHellmanCng.HashAlgorithm = CngAlgorithm.Sha256;
+
+                byte[] myPublicKey = eCDiffieHellmanCng.PublicKey.ToByteArray();
+                tcpStream.Write(myPublicKey, 0, myPublicKey.Length);
+
+                byte[] therePublicKey = new byte[STD_BUFF];
+                int retLenght = tcpStream.Read(therePublicKey, 0, therePublicKey.Length);
+                CngKey thereKey = CngKey.Import(therePublicKey, CngKeyBlobFormat.EccPublicBlob);
+                byte[] myKey = eCDiffieHellmanCng.DeriveKeyMaterial(thereKey);
+
+                using (Aes aes = Aes.Create())
+                {
+                    aes.Key = myKey;
+                    aes.IV = Encoding.UTF8.GetBytes("sestnajst1616161");
+                    //Console.WriteLine(Encoding.UTF8.GetString(aes.IV));
+                    aes.Mode = CipherMode.CBC;
+                    aes.Padding = PaddingMode.PKCS7;
+                    // Encrypt the message
+
+                    using(FileStream fileStream = new FileStream("video.mp4", FileMode.OpenOrCreate))
+                    using (CryptoStream cs = new CryptoStream(tcpStream, aes.CreateDecryptor(), CryptoStreamMode.Read))
+                    {
+                        
+                        for (int i = 0; i < bufferCount+1; i++)
+                        {
+                            byte[] bytes2 = new byte[STD_BUFF];
+                            int len = cs.Read(bytes2, 0, bytes2.Length);
+
+                            //Console.WriteLine(Encoding.UTF8.GetString(bytes2));
+                            fileStream.Write(bytes2, 0, len);
+                        }
+
+                        cs.Close();
+                        fileStream.Close();
+                    }
+                    aes.Dispose();
+                }
+            }
+
+            
+
+
+            
+            tcpStream.Close();
+            client.Close();
+
+
+            Console.WriteLine("Finished");
+            Console.ReadKey();
+        }
+    }
+}

semester_3/racunalniska_omrezja/naloga_4/Client/Client.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>