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https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] +base64 = "0.21.4" +ircparser = "0.2.1" +openssl = "0.10" +pgp = "0.10.2" diff --git a/src/encryption.rs b/src/encryption.rs new file mode 100644 index 0000000..d7ffc7c --- /dev/null +++ b/src/encryption.rs @@ -0,0 +1,37 @@ +use ircparser; +use pgp::{composed::signed_key::*, Deserializable}; +use std::sync::mpsc; + +fn initialize_connection( + tx: mpsc::Sender, + rx: mpsc::Receiver, + person: &str, + key_string: &str, +) -> Result { + tx.send(format!("PRIVMSG {person} INITIALIZE")) + .expect("Closed"); + + for line in key_string.split('\n') { + tx.send(format!("PRIVMSG {person} {line}")).unwrap(); + } + + let mut key_lines: Vec = vec![]; + let mut line: String = String::new(); + + while line != "END" { + key_lines.push(line); + line = match ircparser::parse(&rx.recv().expect("Channel Closed")) { + Ok(parsed) => { + let line = &parsed[0]; + + line.params[1].clone() + } + Err(e) => { + println!("WARN: got invalid line {e}"); + String::new() + } + } + } + + Ok(SignedPublicKey::from_string(&key_lines.join("\n"))?.0) +} diff --git a/src/listener_server.rs b/src/listener_server.rs new file mode 100644 index 0000000..9e90869 --- /dev/null +++ b/src/listener_server.rs @@ -0,0 +1,43 @@ +use std::io::{self, Read, Write}; +use std::net::TcpListener; +use std::sync::mpsc; +use std::time::Duration; + +pub fn listen_to_client(tx: mpsc::Sender, rx: mpsc::Receiver) { + let listener = TcpListener::bind("127.0.0.1:6666").unwrap(); + let mut stream = listener.accept().unwrap().0; + + stream + .set_read_timeout(Some(Duration::from_millis(10))) + .expect("Couldn't set timeout!!"); + + loop { + let mut buffer: Vec = Vec::new(); + let mut buf: [u8; 1] = [0]; + let newline: u8 = b'\n'; + + while buf[0] != newline { + match stream.read(&mut buf) { + Ok(_length) => { + buffer.push(buf[0]); + } + Err(_error) => match _error.kind() { + io::ErrorKind::TimedOut => {} + _ => {} + }, + } + + match rx.try_recv() { + Ok(value) => { + match stream.write_all(value.as_bytes()) { + Ok(_) => {} + Err(_e) => println!("Couldn't send {value}"), + }; + } + Err(_e) => {} + } + } + + let _ = tx.send(String::from_utf8_lossy(&buffer).to_string()); + } +} diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..b3b389e --- /dev/null +++ b/src/main.rs @@ -0,0 +1,135 @@ +use base64::{engine::general_purpose, Engine as _}; +use ircparser; +use std::collections::HashMap; +use std::net::{Shutdown, TcpStream}; +use std::sync::mpsc; +use std::thread; +use std::{env, fs}; + +mod encryption; +mod listener_server; +mod message_stream; +mod writer_client; + +macro_rules! try_recv { + ($rx:ident) => { + match $rx.try_recv() { + Ok(recieved) => recieved, + Err(_e) => match _e { + mpsc::TryRecvError::Empty => String::new(), + mpsc::TryRecvError::Disconnected => { + panic!("Error!") + } + }, + } + }; +} + +fn main() -> Result<(), Box> { + let args = env::args(); + + let server = args.collect::>()[1].clone(); + + let stream = TcpStream::connect(format!("{server}:6697"))?; + + let public_key = general_purpose::STANDARD.encode(fs::read("public.asc")?); + let secret_key = general_purpose::STANDARD.encode(fs::read("secret.asc")?); + + let reader_stream = match stream.try_clone() { + Ok(stream) => stream, + Err(_error) => { + let _ = stream.shutdown(Shutdown::Both); + panic!("Failed to create the reader stream") + } + }; + + let writer_stream = match stream.try_clone() { + Ok(stream) => stream, + Err(_error) => { + let _ = stream.shutdown(Shutdown::Both); + let _ = reader_stream.shutdown(Shutdown::Both); + panic!("Failed to create the writer stream") + } + }; + + let (listener_channel_send_tx, listener_channel_rx) = mpsc::channel(); + let (listener_channel_tx, listener_channel_recv_rx) = mpsc::channel(); + + let (writer_channel_tx, writer_channel_send_rx) = mpsc::channel(); + let (writer_channel_recv_tx, writer_channel_rx) = mpsc::channel(); + + thread::spawn(|| { + listener_server::listen_to_client(listener_channel_send_tx, listener_channel_recv_rx) + }); + thread::spawn(|| { + writer_client::write_to_server( + writer_stream, + server, + writer_channel_send_rx, + writer_channel_recv_tx, + ) + }); + + let mut negotiated_users: HashMap = HashMap::new(); + + loop { + let recieved = try_recv!(listener_channel_rx); + + if recieved != "" { + let command = &ircparser::parse(&recieved).expect("Got an invalid IRC instruction")[0]; + + if command.command == "PRIVMSG" && !command.params[0].starts_with("#") { + if !negotiated_users.get(&command.params[0]).is_none() { + dbg!(recieved); + let reciever = &command.params[0]; + + writer_channel_tx.send(format!("PRIVMSG {reciever} START_KEY\n"))?; + for line in public_key + .chars() + .collect::>() + .chunks(50) + .map(|c| c.iter().collect::()) + .collect::>() + { + dbg!(&line); + writer_channel_tx + .send(format!("PRIVMSG {reciever} {}", line.clone() + "\n"))?; + } + writer_channel_tx.send(format!("PRIVMSG {reciever} END_KEY\n"))?; + + let mut foreign_key: Vec = Vec::new(); + while !foreign_key.contains(&"END_KEY".to_string()) { + dbg!("Trying to recv"); + let recieved_raw = writer_channel_rx.recv()?; + dbg!(&recieved_raw); + + let recieved = &ircparser::parse(&recieved_raw).unwrap()[0]; + let begin_source_reciever = format!(":{reciever}!"); + if recieved.command != "PRIVMSG" + || !recieved + .source + .clone() + .unwrap_or("".to_string()) + .starts_with(&begin_source_reciever) + { + writer_channel_tx.send(recieved_raw)?; + continue; + } + + foreign_key.push(recieved.params[1].clone()); + } + foreign_key.pop(); + } + } else { + dbg!(&recieved); + writer_channel_tx.send(recieved)?; + } + } + + let recieved = try_recv!(writer_channel_rx); + if recieved != "" { + dbg!(&recieved); + listener_channel_tx.send(recieved)?; + } + } +} diff --git a/src/message_stream.rs b/src/message_stream.rs new file mode 100644 index 0000000..f934cd4 --- /dev/null +++ b/src/message_stream.rs @@ -0,0 +1,46 @@ +use ircparser; +use std::io::{Read, Write}; + +struct MessageStream<'a, StreamType: Write + Read + ?Sized> { + stream: Box, + reciver: &'a str, + sender: &'a str, +} + +trait Stream: Write + Read {} + +impl Write for MessageStream<'_, dyn Stream> { + fn write(&mut self, buf: &[u8]) -> std::io::Result { + let to_send = "PRIVMSG".to_owned() + self.sender + &String::from_utf8_lossy(buf) + "\n"; + self.stream.write(to_send.as_bytes())?; + Ok(buf.len()) + } + + fn flush(&mut self) -> std::io::Result<()> { + self.stream.flush() + } +} + +impl Read for MessageStream<'_, dyn Stream> { + fn read(&mut self, buf: &mut [u8]) -> std::io::Result { + let mut readed = String::new(); + let _ = self.stream.read_to_string(&mut readed); + let commands = ircparser::parse(&readed).unwrap(); + + let mut messages: Vec = vec![]; + + for command in commands { + let command_string = &command.command; + let command_reciver = &command.params[0]; + let command_sender = command.source.unwrap_or("".to_string()); + if command_string == "PRIVMSG" + && command_reciver == self.sender + && command_sender.starts_with(&format!(":{}", self.reciver)) + { + messages.push(command.params[1].clone()); + } + } + + Ok(messages.join("\n").as_bytes().read(buf)?) + } +} diff --git a/src/writer_client.rs b/src/writer_client.rs new file mode 100644 index 0000000..26ecb6d --- /dev/null +++ b/src/writer_client.rs @@ -0,0 +1,60 @@ +use openssl::ssl::{SslConnector, SslMethod}; +use std::io::{ErrorKind, Write}; +use std::net::TcpStream; +use std::sync::mpsc; +use std::time::Duration; + +pub fn write_to_server( + tcp_stream: TcpStream, + server: String, + rx: mpsc::Receiver, + tx: mpsc::Sender, +) { + let connector = SslConnector::builder(SslMethod::tls()).unwrap().build(); + let mut stream = connector + .connect(&server, &tcp_stream) + .expect("Couldn't start TLS"); + + tcp_stream + .set_read_timeout(Some(Duration::from_millis(10))) + .expect("Couldn't set timeout!!"); + + loop { + let mut buffer: Vec = Vec::new(); + let mut buf: [u8; 1] = [0]; + let newline: u8 = b'\n'; + + while buf[0] != newline { + match stream.ssl_read(&mut buf) { + Ok(_length) => { + buffer.push(buf[0]); + } + Err(_error) => match _error.io_error() { + None => { + panic!("TLS Error") + } + Some(error) => match error.kind() { + ErrorKind::TimedOut => {} + ErrorKind::WouldBlock => {} + _ => { + dbg!(error.kind()); + println!("Couldn't read the stream"); + } + }, + }, + } + + match rx.try_recv() { + Ok(value) => { + match stream.write_all(value.as_bytes()) { + Ok(_) => {} + Err(_e) => println!("Couldn't send {value}"), + }; + } + Err(_e) => {} + } + } + + let _ = tx.send(String::from_utf8_lossy(&buffer).to_string()); + } +}