mirror of https://github.com/ctz/rustls
100 lines
2.8 KiB
Rust
100 lines
2.8 KiB
Rust
/*
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* A Rustls stub for TryTLS
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*
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* Author: Joachim Viide
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* See: https://github.com/HowNetWorks/trytls-rustls-stub
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*/
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extern crate rustls;
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extern crate webpki_roots;
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use std::io::{Read, Write, BufReader};
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use std::net::TcpStream;
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use std::sync::Arc;
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use std::fs::File;
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use std::error::Error;
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use std::process;
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use std::env;
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use rustls::{ClientConfig, ClientSession, Session, TLSError};
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enum Verdict {
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Accept,
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Reject(TLSError),
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}
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fn parse_args(args: &Vec<String>) -> Result<(String, u16, ClientConfig), Box<Error>> {
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let mut config = ClientConfig::new();
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match args.len() {
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3 => {
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config.root_store.add_trust_anchors(&webpki_roots::ROOTS);
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}
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4 => {
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let f = try!(File::open(&args[3]));
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let mut f = BufReader::new(f);
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if let Err(_) = config.root_store.add_pem_file(&mut f) {
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return Err(From::from("Could not load PEM data"));
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}
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}
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_ => {
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return Err(From::from("Incorrect number of arguments"));
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}
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};
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let port = try!(args[2].parse());
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Ok((args[1].clone(), port, config))
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}
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fn communicate(host: String, port: u16, config: ClientConfig) -> Result<Verdict, Box<Error>> {
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let rc_config = Arc::new(config);
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let mut client = ClientSession::new(&rc_config, &host);
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let mut stream = try!(TcpStream::connect((&*host, port)));
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try!(client.write(b"GET / HTTP/1.0\r\nConnection: close\r\nContent-Length: 0\r\n\r\n"));
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loop {
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while client.wants_write() {
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try!(client.write_tls(&mut stream));
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}
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if client.wants_read() {
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if try!(client.read_tls(&mut stream)) == 0 {
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return Err(From::from("Connection closed"));
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}
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if let Err(err) = client.process_new_packets() {
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return match err {
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TLSError::WebPKIError(_) |
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TLSError::AlertReceived(_) => Ok(Verdict::Reject(err)),
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_ => Err(From::from(format!("{:?}", err))),
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};
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}
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if try!(client.read(&mut [0])) > 0 {
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return Ok(Verdict::Accept);
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}
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}
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}
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}
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fn main() {
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let args: Vec<String> = env::args().collect();
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let (host, port, config) = parse_args(&args).unwrap_or_else(|err| {
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println!("Argument error: {}", err);
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process::exit(2);
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});
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match communicate(host, port, config) {
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Ok(Verdict::Accept) => {
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println!("ACCEPT");
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process::exit(0);
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}
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Ok(Verdict::Reject(reason)) => {
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println!("{:?}", reason);
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println!("REJECT");
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process::exit(0);
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}
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Err(err) => {
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println!("{}", err);
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process::exit(1);
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}
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}
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}
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