v0.2.0: switch to quic

This commit is contained in:
chayleaf 2024-02-01 06:48:22 +07:00
parent 0ce3bd5ded
commit a7e23e2f3f
Signed by: chayleaf
GPG key ID: 78171AD46227E68E
4 changed files with 673 additions and 461 deletions

1
.gitignore vendored
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@ -1,2 +1,3 @@
/target
*.conf
*.der

673
Cargo.lock generated
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source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6980e8d7511241f8acf4aebddbb1ff938df5eebe98691418c4468d0b72a96a67"
[[package]]
name = "syn"
@ -502,6 +569,59 @@ dependencies = [
"unicode-ident",
]
[[package]]
name = "thiserror"
version = "1.0.56"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d54378c645627613241d077a3a79db965db602882668f9136ac42af9ecb730ad"
dependencies = [
"thiserror-impl",
]
[[package]]
name = "thiserror-impl"
version = "1.0.56"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fa0faa943b50f3db30a20aa7e265dbc66076993efed8463e8de414e5d06d3471"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "time"
version = "0.3.31"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f657ba42c3f86e7680e53c8cd3af8abbe56b5491790b46e22e19c0d57463583e"
dependencies = [
"deranged",
"powerfmt",
"serde",
"time-core",
]
[[package]]
name = "time-core"
version = "0.1.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ef927ca75afb808a4d64dd374f00a2adf8d0fcff8e7b184af886c3c87ec4a3f3"
[[package]]
name = "tinyvec"
version = "1.6.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "87cc5ceb3875bb20c2890005a4e226a4651264a5c75edb2421b52861a0a0cb50"
dependencies = [
"tinyvec_macros",
]
[[package]]
name = "tinyvec_macros"
version = "0.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
[[package]]
name = "tokio"
version = "1.35.1"
@ -515,7 +635,7 @@ dependencies = [
"pin-project-lite",
"socket2",
"tokio-macros",
"windows-sys",
"windows-sys 0.48.0",
]
[[package]]
@ -530,10 +650,36 @@ dependencies = [
]
[[package]]
name = "typenum"
version = "1.17.0"
name = "tracing"
version = "0.1.40"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
checksum = "c3523ab5a71916ccf420eebdf5521fcef02141234bbc0b8a49f2fdc4544364ef"
dependencies = [
"log",
"pin-project-lite",
"tracing-attributes",
"tracing-core",
]
[[package]]
name = "tracing-attributes"
version = "0.1.27"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "34704c8d6ebcbc939824180af020566b01a7c01f80641264eba0999f6c2b6be7"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "tracing-core"
version = "0.1.32"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c06d3da6113f116aaee68e4d601191614c9053067f9ab7f6edbcb161237daa54"
dependencies = [
"once_cell",
]
[[package]]
name = "unicode-ident"
@ -542,20 +688,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
[[package]]
name = "universal-hash"
version = "0.5.1"
name = "untrusted"
version = "0.7.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fc1de2c688dc15305988b563c3854064043356019f97a4b46276fe734c4f07ea"
dependencies = [
"crypto-common",
"subtle",
]
checksum = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"
[[package]]
name = "version_check"
version = "0.9.4"
name = "untrusted"
version = "0.9.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1"
[[package]]
name = "wasi"
@ -618,14 +760,37 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4d91413b1c31d7539ba5ef2451af3f0b833a005eb27a631cec32bc0635a8602b"
[[package]]
name = "windows-core"
version = "0.52.0"
name = "web-sys"
version = "0.3.67"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "33ab640c8d7e35bf8ba19b884ba838ceb4fba93a4e8c65a9059d08afcfc683d9"
checksum = "58cd2333b6e0be7a39605f0e255892fd7418a682d8da8fe042fe25128794d2ed"
dependencies = [
"windows-targets 0.52.0",
"js-sys",
"wasm-bindgen",
]
[[package]]
name = "winapi"
version = "0.3.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
dependencies = [
"winapi-i686-pc-windows-gnu",
"winapi-x86_64-pc-windows-gnu",
]
[[package]]
name = "winapi-i686-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
[[package]]
name = "winapi-x86_64-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
[[package]]
name = "windows-sys"
version = "0.48.0"
@ -635,6 +800,15 @@ dependencies = [
"windows-targets 0.48.5",
]
[[package]]
name = "windows-sys"
version = "0.52.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
dependencies = [
"windows-targets 0.52.0",
]
[[package]]
name = "windows-targets"
version = "0.48.5"
@ -750,7 +924,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "dff9641d1cd4be8d1a070daf9e3773c5f67e78b4d9d42263020c057706765c04"
[[package]]
name = "zeroize"
version = "1.7.0"
name = "yasna"
version = "0.5.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "525b4ec142c6b68a2d10f01f7bbf6755599ca3f81ea53b8431b7dd348f5fdb2d"
checksum = "e17bb3549cc1321ae1296b9cdc2698e2b6cb1992adfa19a8c72e5b7a738f44cd"
dependencies = [
"time",
]

View file

@ -1,15 +1,15 @@
[package]
name = "fckrkn"
version = "0.1.0"
version = "0.2.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
async-shared-timeout = "0.2.0"
bytes = "1.5.0"
chacha20poly1305 = "0.10.1"
chrono = "0.4.33"
dashmap = "5.5.3"
quinn = "0.10.2"
rcgen = "0.12.1"
rustls = "0.21.0"
rustls-native-certs = "0.7.0"
rustls-pemfile = "2.0.0"
tokio = { version = "1.35.1", features = ["rt-multi-thread", "macros", "net", "sync", "time"] }
typenum = "1.17.0"

View file

@ -1,176 +1,19 @@
use std::{
collections::HashMap,
mem,
fs, io,
net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr},
sync::{
atomic::{AtomicU32, Ordering},
Arc,
},
path::PathBuf,
str,
sync::Arc,
time::Duration,
};
use async_shared_timeout::Timeout;
use bytes::BytesMut;
use chacha20poly1305::{aead::Buffer, AeadCore, AeadInPlace, ChaCha20Poly1305, KeyInit};
use dashmap::DashMap;
use tokio::{net::UdpSocket, sync::mpsc};
use typenum::Unsigned;
#[derive(Debug)]
enum BMut<'a> {
Bytes(BytesMut),
Vec(&'a mut Vec<u8>),
}
impl<'a> Buffer for BMut<'a> {
fn extend_from_slice(&mut self, other: &[u8]) -> chacha20poly1305::aead::Result<()> {
match self {
Self::Bytes(x) => x.extend_from_slice(other),
Self::Vec(x) => x.extend_from_slice(other),
}
Ok(())
}
fn truncate(&mut self, len: usize) {
match self {
Self::Bytes(x) => x.truncate(len),
Self::Vec(x) => x.truncate(len),
}
}
}
impl<'a> AsRef<[u8]> for BMut<'a> {
fn as_ref(&self) -> &[u8] {
match self {
Self::Bytes(x) => x.as_ref(),
Self::Vec(x) => x.as_ref(),
}
}
}
impl<'a> AsMut<[u8]> for BMut<'a> {
fn as_mut(&mut self) -> &mut [u8] {
match self {
Self::Bytes(x) => x.as_mut(),
Self::Vec(x) => x.as_mut(),
}
}
}
enum ChanOrSock {
Chan(mpsc::Receiver<BytesMut>),
Sock(Arc<UdpSocket>, Vec<u8>),
}
impl ChanOrSock {
async fn recv(&mut self) -> Option<BMut<'_>> {
match self {
Self::Chan(x) => x.recv().await.map(BMut::Bytes),
Self::Sock(sock, buf) => {
buf.resize(65536, 0);
let len = sock.recv(buf).await.ok()?;
buf.truncate(len);
Some(BMut::Vec(buf))
}
}
}
}
static SESSION_ID: AtomicU32 = AtomicU32::new(0);
static PROTOCOL_VERSION: u8 = 0;
async fn thread(
(mut rx_enc, sock_enc, enc_addr): (ChanOrSock, Arc<UdpSocket>, SocketAddr),
(mut rx_dec, sock_dec, dec_addr): (ChanOrSock, Arc<UdpSocket>, SocketAddr),
server: bool,
chans: Arc<DashMap<SocketAddr, mpsc::Sender<BytesMut>>>,
cipher_remote: ChaCha20Poly1305,
cipher_local: ChaCha20Poly1305,
) {
let timeout = Timeout::new(
async_shared_timeout::runtime::Tokio::new(),
Duration::from_secs(1),
);
let session_id = SESSION_ID.fetch_add(1, Ordering::SeqCst).to_be_bytes();
let remote_to_local = async {
let mut timeout_set = false;
while let Some(mut buf) = rx_enc.recv().await {
if buf.len() < 12 {
continue;
}
let nonce = <[u8; 12]>::try_from(&buf.as_ref()[buf.len() - 12..]).unwrap();
let time = chrono::Utc::now().timestamp_nanos_opt().unwrap();
let nonce1 = [
nonce[4], nonce[5], nonce[6], nonce[7], nonce[8], nonce[9], nonce[10], nonce[11],
];
if i64::from_be_bytes(nonce1).abs_diff(time) > 10_000_000_000 {
eprintln!("got invalid nonce");
continue;
}
buf.truncate(buf.len() - 12);
if let Err(err) = cipher_remote.decrypt_in_place((&nonce).into(), b"", &mut buf) {
eprintln!("decrypt error: {err}");
continue;
}
if server {
if !timeout_set {
timeout_set = true;
timeout.set_default_timeout(Duration::from_secs(90));
}
timeout.reset();
}
if let Err(err) = sock_dec.as_ref().send_to(buf.as_ref(), dec_addr).await {
eprintln!("decrypted send error: {err}");
}
}
};
let local_to_remote = async {
let mut timeout_set = false;
while let Some(mut buf) = rx_dec.recv().await {
let time = chrono::Utc::now()
.timestamp_nanos_opt()
.unwrap()
.to_be_bytes();
let nonce = [
PROTOCOL_VERSION,
session_id[0],
session_id[1],
session_id[2],
time[0],
time[1],
time[2],
time[3],
time[4],
time[5],
time[6],
time[7],
];
if let Err(err) = cipher_local.encrypt_in_place((&nonce).into(), b"", &mut buf) {
eprintln!("encrypt error: {err}");
continue;
}
buf.extend_from_slice(&nonce).unwrap();
if !server {
if !timeout_set {
timeout_set = true;
timeout.set_default_timeout(Duration::from_secs(90));
}
timeout.reset();
}
if let Err(err) = sock_enc.as_ref().send_to(buf.as_ref(), enc_addr).await {
eprintln!("encrypted send error: {err}");
}
}
};
tokio::select! {
_ = timeout.wait() => {}
_ = remote_to_local => {}
_ = local_to_remote => {}
}
chans.remove(&enc_addr);
}
use quinn::{IdleTimeout, TransportConfig, VarInt};
use tokio::{net::UdpSocket, time::Instant};
#[tokio::main]
async fn main() {
assert_eq!(<ChaCha20Poly1305 as AeadCore>::NonceSize::to_usize(), 12);
async fn main() -> Result<(), io::Error> {
let mut args = std::env::args().skip(1);
let data = std::fs::read_to_string(args.next().unwrap())
.unwrap()
@ -190,38 +33,107 @@ async fn main() {
})
.collect::<HashMap<_, _>>();
let ver: u8 = data.get("version").unwrap().parse().unwrap();
assert!(matches!(ver, 0));
assert!(matches!(ver, 1));
let server = data.contains_key("server");
let src: SocketAddr = data.get("bind").unwrap().parse().unwrap();
let dst: SocketAddr = data.get("connect").unwrap().parse().unwrap();
let h2b = |x: &str| {
x.as_bytes()
.chunks_exact(2)
.map(|x| u8::from_str_radix(std::str::from_utf8(x).unwrap(), 16).unwrap())
.collect::<Box<[u8]>>()
};
let key_local = h2b(data.get("key_local").unwrap());
let key_remote = h2b(data.get("key_remote").unwrap());
let server = data.contains_key("server");
let cipher_local = ChaCha20Poly1305::new_from_slice(&key_local).unwrap();
let cipher_remote = ChaCha20Poly1305::new_from_slice(&key_remote).unwrap();
let sock = Arc::new(UdpSocket::bind(src).await.unwrap());
let chans = Arc::new(DashMap::<SocketAddr, mpsc::Sender<_>>::new());
let mut buf = BytesMut::with_capacity(65536);
loop {
buf.resize(65536, 0);
let Ok((len, addr)) = sock.recv_from(&mut buf).await else {
continue;
let proxy_key = Box::leak(h2b(data.get("key").unwrap()));
if server {
let dst: SocketAddr = data.get("connect").unwrap().parse().unwrap();
let (certs, key) = if let (Some(key_path), Some(cert_path)) = (
data.get("ssl_key").map(PathBuf::from),
data.get("ssl_cert").map(PathBuf::from),
) {
let key = fs::read(&key_path).unwrap();
let key = if key_path.extension().map_or(false, |x| x == "der") {
rustls::PrivateKey(key)
} else {
rustls::PrivateKey(
match rustls_pemfile::read_one_from_slice(&key)
.unwrap()
.unwrap()
.0
{
rustls_pemfile::Item::Sec1Key(x) => x.secret_sec1_der().to_owned(),
rustls_pemfile::Item::Pkcs1Key(x) => x.secret_pkcs1_der().to_owned(),
rustls_pemfile::Item::Pkcs8Key(x) => x.secret_pkcs8_der().to_owned(),
rustls_pemfile::Item::X509Certificate(x) => x.as_ref().to_owned(),
_ => panic!(),
},
)
};
if let Some(ch) = chans.get(&addr) {
if ch.send(buf.split_to(len)).await.is_ok() {
continue;
let cert_chain = fs::read(&cert_path).unwrap();
let cert_chain = if cert_path.extension().map_or(false, |x| x == "der") {
vec![rustls::Certificate(cert_chain)]
} else {
rustls_pemfile::certs(&mut &*cert_chain)
.map(|x| rustls::Certificate(x.unwrap().to_vec()))
.collect()
};
(cert_chain, key)
} else {
let cert_path = "cert.der";
let key_path = "key.der";
let (cert, key) = match fs::read(cert_path).and_then(|x| Ok((x, fs::read(key_path)?))) {
Ok(x) => x,
Err(ref e) if e.kind() == io::ErrorKind::NotFound => {
let cert =
rcgen::generate_simple_self_signed(vec!["localhost".into()]).unwrap();
let key = cert.serialize_private_key_der();
let cert = cert.serialize_der().unwrap();
fs::write(cert_path, &cert).unwrap();
fs::write(key_path, &key).unwrap();
(cert, key)
}
Err(e) => {
panic!("failed to read certificate: {}", e);
}
let (tx, rx) = mpsc::channel(128);
tx.send(buf.split_to(len)).await.unwrap();
chans.insert(addr, tx);
let sock2 = Arc::new(
UdpSocket::bind((
};
let key = rustls::PrivateKey(key);
let cert = rustls::Certificate(cert);
(vec![cert], key)
};
let mut server_crypto = rustls::ServerConfig::builder()
.with_safe_defaults()
.with_no_client_auth()
.with_single_cert(certs, key)
.unwrap();
server_crypto.alpn_protocols = vec![b"hq-29".to_vec()];
let mut server_config = quinn::ServerConfig::with_crypto(Arc::new(server_crypto));
let transport_config = Arc::get_mut(&mut server_config.transport).unwrap();
transport_config.max_concurrent_uni_streams(0_u8.into());
transport_config.max_concurrent_bidi_streams(0_u8.into());
// milliseconds
transport_config.max_idle_timeout(Some(IdleTimeout::from(VarInt::from(90_000u32))));
let endpoint = quinn::Endpoint::server(server_config, src)?;
println!("listening on {:?}", endpoint.local_addr());
while let Some(conn) = endpoint.accept().await {
let proxy_key = &*proxy_key;
tokio::spawn(async move {
let Ok(connection) = conn.await else {
return;
};
let Ok(dgram) = connection.read_datagram().await else {
return;
};
if dgram != proxy_key {
eprintln!("invalid key");
return;
}
let Ok(sock) = UdpSocket::bind((
if dst.is_ipv6() {
IpAddr::V6(Ipv6Addr::UNSPECIFIED)
} else {
@ -230,23 +142,145 @@ async fn main() {
0,
))
.await
.unwrap(),
);
sock2.connect(dst).await.unwrap();
let (mut enc, mut dec) = (
(ChanOrSock::Sock(sock2.clone(), vec![]), sock2, dst),
(ChanOrSock::Chan(rx), sock.clone(), addr),
);
if server {
mem::swap(&mut enc, &mut dec);
else {
return;
};
sock.connect(dst).await.unwrap();
let remote_to_local = async {
while let Ok(dgram) = connection.read_datagram().await {
let _ = sock.send(&dgram).await;
}
tokio::spawn(thread(
enc,
dec,
server,
chans.clone(),
cipher_remote.clone(),
cipher_local.clone(),
));
};
let local_to_remote = async {
let mut buf = BytesMut::with_capacity(65536);
while let Ok(len) = {
buf.resize(65536, 0);
sock.recv(&mut buf).await
} {
let _ = connection.send_datagram(buf.split_to(len).into());
}
};
tokio::select! {
_ = local_to_remote => {}
_ = remote_to_local => {}
}
});
}
} else {
let dst = data.get("connect").unwrap();
let mut resolved = tokio::net::lookup_host(dst)
.await
.unwrap()
.collect::<Vec<_>>();
resolved.sort_by_key(|x| x.is_ipv6());
let resolved = resolved.into_iter().next().unwrap();
let hostname = dst
.chars()
.rev()
.collect::<String>()
.split_once(':')
.unwrap()
.1
.chars()
.rev()
.collect::<String>();
let mut client_crypto = rustls::ClientConfig::builder()
.with_safe_defaults()
.with_root_certificates({
let mut roots = rustls::RootCertStore::empty();
for cert in rustls_native_certs::load_native_certs().unwrap() {
roots
.add(&rustls::Certificate(cert.as_ref().to_vec()))
.unwrap();
}
roots
.add(&rustls::Certificate(fs::read("cert.der").unwrap()))
.unwrap();
Arc::new(roots)
})
.with_no_client_auth();
client_crypto.alpn_protocols = vec![b"hq-29".to_vec()];
let mut client_config = quinn::ClientConfig::new(Arc::new(client_crypto));
client_config.transport_config(Arc::new({
let mut cfg = TransportConfig::default();
cfg.keep_alive_interval(Some(Duration::from_secs(30)))
.max_concurrent_bidi_streams(0u8.into())
.max_concurrent_uni_streams(0u8.into())
.max_idle_timeout(Some(Duration::from_secs(90).try_into().unwrap()));
cfg
}));
let mut endpoint = quinn::Endpoint::client(
(
if resolved.is_ipv6() {
IpAddr::V6(Ipv6Addr::UNSPECIFIED)
} else {
IpAddr::V4(Ipv4Addr::UNSPECIFIED)
},
0,
)
.into(),
)?;
endpoint.set_default_client_config(client_config);
let endpoint = Arc::new(endpoint);
loop {
let proxy_key = &*proxy_key;
let endpoint = endpoint.clone();
let hostname = hostname.clone();
let _ = tokio::spawn(async move {
let conn = endpoint
.connect(resolved, &hostname)
.unwrap()
.await
.unwrap();
println!("connected");
let sock = Arc::new(UdpSocket::bind(src).await.unwrap());
conn.send_datagram(proxy_key.into()).unwrap();
let local_to_remote = async {
let mut buf = BytesMut::with_capacity(65536);
buf.resize(65536, 0);
let mut chosen_addr = None;
let mut chosen_time = Instant::now();
loop {
buf.resize(65536, 0);
let Ok((len, addr)) = sock.recv_from(&mut buf).await else {
continue;
};
if Some(addr) != chosen_addr {
if chosen_addr.is_none()
|| chosen_time + Duration::from_secs(10) > Instant::now()
{
chosen_addr = Some(addr);
let _ = sock.connect(addr).await;
} else {
continue;
}
}
chosen_time = Instant::now();
if let Err(err) = conn.send_datagram(buf.split_to(len).into()) {
eprintln!("send failed: {err}");
}
}
};
let remote_to_local = async {
loop {
let dgram = conn.read_datagram().await.unwrap();
let _ = sock.send(&dgram).await;
}
};
tokio::select! {
_ = local_to_remote => {}
_ = remote_to_local => {}
}
})
.await;
eprintln!("sleeping for 10 seconds...");
tokio::time::sleep(Duration::from_secs(10)).await;
}
}
Ok(())
}