From 253fdd2a4094f67f762b2aced2356c1c51727e3a Mon Sep 17 00:00:00 2001
From: Rusty Striker <avivr903@tutanota.com>
Date: Sat, 14 Dec 2024 19:10:09 +0200
Subject: [PATCH] I DID PROGRESS!

---
 README.md            | 13 +++++++++++++
 client/Program.cs    | 17 ++++++++++++++++-
 client/client.csproj | 10 +++++-----
 lib/Crypto.cs        | 11 +++++++++++
 lib/lib.csproj       |  3 +++
 protocol.md          |  4 +++-
 6 files changed, 51 insertions(+), 7 deletions(-)
 create mode 100644 lib/Crypto.cs

diff --git a/README.md b/README.md
index 689eedf..d5f545e 100644
--- a/README.md
+++ b/README.md
@@ -9,3 +9,16 @@
 [ ] Refine protocol using the implementation (and update stuff that got changed in impl)
 [ ] Finish implementing the protocol
 [ ] Update the protocol file with the latest structs and stuff
+
+## Protocol todo:
+
+[ ] Figure out how a message and message ack payload will look
+[ ] Figure out server responses (hopefully manages to be stuck in a 512 bit block as well)
+
+
+## client todo:
+
+[ ] Check for key when turned on
+	[ ] generate key and register if no key is preset, and save it after registration is done
+	[ ] if key is present, start by getting messages (which makes sure we are signed in)
+
diff --git a/client/Program.cs b/client/Program.cs
index 8381c75..a198e26 100644
--- a/client/Program.cs
+++ b/client/Program.cs
@@ -2,6 +2,8 @@
 using System.Net.Sockets;
 using System.Text;
 using System.Threading.Tasks;
+using System.Security.Cryptography;
+using System.Linq;
 
 namespace Client;
 
@@ -9,6 +11,10 @@ public class Program
 {
     static void Main(string[] args)
     {
+        
+        RSA key = RSA.Create(512);
+        Console.WriteLine($"key: {key.ExportRSAPrivateKey().Length}");
+        Console.WriteLine(key.ExportRSAPublicKeyPem());
         using TcpClient client = new("127.0.0.1", 12345);
 
         byte[] toSend = Encoding.ASCII.GetBytes("hello server");
@@ -29,6 +35,15 @@ public class Program
                 await Task.Delay(100);
                 continue;
             }
+            else if(input.StartsWith('/')) {
+                // Commands :D, i like commands
+                switch(input.ToLower()) {
+                    case "/quit":
+                    case "/exit":
+                    case "/q!":
+                        return;
+                }
+            }
             else {
                 stream.Write(Encoding.ASCII.GetBytes(input));
                 Console.WriteLine($"[{DateTime.Now}]Sent to server: {input}");
@@ -42,7 +57,7 @@ public class Program
             int readLen = await stream.ReadAsync(buffer);
             if(readLen != 0) {
                 string fromServer = Encoding.ASCII.GetString(buffer[..readLen]);
-                Console.WriteLine($"[{DateTime.Now}]\t\tFrom server: {fromServer}");
+                Console.WriteLine($"[{DateTime.Now}]  From server: {fromServer}");
 
             }
         }
diff --git a/client/client.csproj b/client/client.csproj
index 84912b2..36cc8b1 100644
--- a/client/client.csproj
+++ b/client/client.csproj
@@ -1,14 +1,14 @@
 <Project Sdk="Microsoft.NET.Sdk">
-
   <ItemGroup>
-    <ProjectReference Include="..\lib\lib.csproj" />
+    <ProjectReference Include="..\lib\lib.csproj"/>
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Cryptography" Version="1.0.0"/>
   </ItemGroup>
-
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>disable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
-
-</Project>
+</Project>
\ No newline at end of file
diff --git a/lib/Crypto.cs b/lib/Crypto.cs
new file mode 100644
index 0000000..30d4c2b
--- /dev/null
+++ b/lib/Crypto.cs
@@ -0,0 +1,11 @@
+using System.Security.Cryptography;
+
+namespace lib;
+
+public static class Crypto {
+    public static RSA GenerateKey() {
+        return RSA.Create(512);
+    }
+
+
+}
\ No newline at end of file
diff --git a/lib/lib.csproj b/lib/lib.csproj
index fa71b7a..73ce23e 100644
--- a/lib/lib.csproj
+++ b/lib/lib.csproj
@@ -1,5 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
+  <ItemGroup>
+    <PackageReference Include="Cryptography" Version="1.0.0"/>
+  </ItemGroup>
   <PropertyGroup>
     <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
diff --git a/protocol.md b/protocol.md
index 26b32d8..a691e53 100644
--- a/protocol.md
+++ b/protocol.md
@@ -76,7 +76,9 @@ I think it all can go into a:
 ```
 and we can just append encrypted payloads to it (in SendMessage and SendAck)
 
-To each message we also append a sha3-256 signed hash
+To each message we also append a sha3-256 signed hash, this shit really feels like overkill and im not sure about it, 
+on the other i do want to have a bigger key size and 512 seems like an okay-ish thing to have, as 256 is short and 1024 is
+amusingly long for the amount of data the server needs to encrypt
 
 enc_server( request - 256 bits, signed sha3-256 )