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13 changed files with 1057 additions and 1125 deletions
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3
.vscode/settings.json vendored
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@ -1,3 +0,0 @@
{
"rust-analyzer.showUnlinkedFileNotification": false
}

9
Cargo.toml
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@ -1,13 +1,16 @@
[package]
name = "sslrelay"
version = "0.6.2"
version = "0.4.4"
authors = ["PinkP4nther <pinkp4nther@protonmail.com> @Pink_P4nther"]
edition = "2018"
description = "A TCP relay library for relaying/modifying/spoofing TCP traffic by implementing callback code."
repository = "https://github.com/PinkP4nther/SSLRelay-lib"
keywords = ["tcp", "networking", "relay", "tls", "ssl"]
categories = ["network-programming"]
categories = ["reverse-engineering", "network-relay", "tcp"]
license = "Apache-2.0"
[dependencies.openssl]
version = "0.10.36"
version = "0.10.36"
[dependencies.toml]
version = "0.5.8"

8
README.md
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@ -28,10 +28,4 @@ A TCP relay library that can handle raw TCP and SSL/TLS connections. You can rea
> 10/06/2021 | **v0.4.2** | Added documentation.
>
> 10/07/2021 | **v0.4.3** | Blocking callbacks now pass self as a mutable reference. This can allow the developer to create structures that can be accessed every stream write. (ONLY in the BLOCKING callback). The self object is refreshed per TCP connection. Separate TCP connections can not touch eachothers data.
>
> 10/08/2021 | **v0.4.4** | Added ability to set TLS certificate and certificate private key to nothing. When passing RelayConfig to the relay object use the 'None' variant of Option<T> enum. In a config file put the cert path and key path as an empty 'String' to specify 'None'.
>
> 10/09/2021 | **v0.6.0** | Gone away with 'ConfigType<T>'! No more specifying config files unless the developer implements it themself. A new config enum 'TLSConfig' has been introduced. This has 3 variants FILE(Specify the cert and pk file paths), DATA(Pass the cert(PEM) data and the pk(PEM) data as bytes), NONE(This is when you are not using TLS on the listening/downstream side of the relay).
>
> 10/10/2021 | **v0.6.2** | StreamWrite's to master thread are no longer verbose when the opposite stream disconnects randomly.
>
> 10/08/2021 | **v0.4.4** | Added ability to set TLS certificate and certificate private key to nothing. When passing RelayConfig to the relay object use the 'None' variant of Option<T> enum. In a config file put the cert path and key path as an empty 'String' to specify 'None'.

66
examples/basic.rs
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@ -1,66 +0,0 @@
use sslrelay::{self, CallbackRet, HandlerCallbacks, RelayConfig, TCPDataType, TLSConfig};
// Handler object
#[derive(Clone)] // Must have Clone trait implemented.
struct Handler;
/*
Callback traits that can be used to read or inject data
into data upstream or downstream.
*/
impl HandlerCallbacks for Handler {
// DownStream non blocking callback
fn ds_nb_callback(&self, in_data: Vec<u8>, _conn_id: u64) {
if let Ok(in_data) = str::from_utf8(&in_data) {
println!("[downstream] {in_data}");
} else {
//println!("[downstream] {in_data:?}");
}
}
// DownStream blocking callback
fn ds_b_callback(&mut self, _in_data: Vec<u8>, _conn_id: u64) -> CallbackRet {
//println!("[CALLBACK] Down Stream Blocking CallBack!");
CallbackRet::Relay(_in_data)
}
// UpStream non blocking callback
fn us_nb_callback(&self, in_data: Vec<u8>, _conn_id: u64) {
if let Ok(in_data) = str::from_utf8(&in_data) {
println!("[upstream] {in_data}");
} else {
//println!("[upstream] {in_data:?}");
}
}
// UpStream blocking callback
fn us_b_callback(&mut self, _in_data: Vec<u8>, _conn_id: u64) -> CallbackRet {
//println!("[CALLBACK] Up Stream Blocking CallBack!");
CallbackRet::Relay(_in_data)
}
}
fn main() {
// Create new SSLRelay object
let mut relay = sslrelay::SSLRelay::new(
Handler,
RelayConfig {
downstream_data_type: TCPDataType::TLS,
upstream_data_type: TCPDataType::TLS,
bind_host: "127.0.0.1".to_string(),
bind_port: "443".to_string(),
remote_host: |server_name| {
server_name.map_or_else(|| panic!("NO HOST"), str::to_string)
},
remote_port: "443".to_string(),
tls_config:
TLSConfig::FILE {
certificate_path: "/dev/shm/exp/certs/prime256v1/apple.com.crt".to_string(),
private_key_path: "/dev/shm/exp/certs/prime256v1/apple.com.key".to_string(),
},
},
);
// Start listening
relay.start();
}

54
examples/basic/src/main.rs Normal file
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@ -0,0 +1,54 @@
use sslrelay::{self, ConfigType, RelayConfig, HandlerCallbacks, CallbackRet, TCPDataType};
// Handler object
#[derive(Clone)] // Must have Clone trait implemented.
struct Handler;
/*
Callback traits that can be used to read or inject data
into data upstream or downstream.
*/
impl HandlerCallbacks for Handler {
// DownStream non blocking callback
fn ds_nb_callback(&self, _in_data: Vec<u8>) {
println!("[CALLBACK] Down Stream Non Blocking CallBack!");
}
// DownStream blocking callback
fn ds_b_callback(&mut self, _in_data: Vec<u8>) -> CallbackRet {
println!("[CALLBACK] Down Stream Blocking CallBack!");
CallbackRet::Relay(_in_data)
}
// UpStream non blocking callback
fn us_nb_callback(&self, _in_data: Vec<u8>) {
println!("[CALLBACK] Up Stream Non Blocking CallBack!");
}
// UpStream blocking callback
fn us_b_callback(&mut self, _in_data: Vec<u8>) -> CallbackRet {
println!("[CALLBACK] Up Stream Blocking CallBack!");
CallbackRet::Relay(_in_data)
}
}
fn main() {
// Create new SSLRelay object
let mut relay = sslrelay::SSLRelay::new(
Handler,
ConfigType::Conf(RelayConfig {
downstream_data_type: TCPDataType::TLS,
upstream_data_type: TCPDataType::TLS,
bind_host: "0.0.0.0".to_string(),
bind_port: "443".to_string(),
remote_host: "remote.com".to_string(),
remote_port: "443".to_string(),
ssl_private_key_path: Some("./remote.com.key".to_string()),
ssl_cert_path: Some("./remote.com.crt".to_string()),
})
);
// Start listening
relay.start();
}

8
examples/modifydata/relay_config.toml Normal file
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@ -0,0 +1,8 @@
bind_host = "0.0.0.0"
bind_port = "443"
ssl_private_key_path = "./remote.com.key"
ssl_cert_path = "./remote.com.crt"
remote_host = "remote.com"
remote_port = "443"
downstream_data_type = "tls"
upstream_data_type = "tls"

18
examples/modifydata/src/main.rs
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@ -1,4 +1,4 @@
use sslrelay::{self, TLSConfig, TCPDataType, RelayConfig, HandlerCallbacks, CallbackRet};
use sslrelay::{self, ConfigType, HandlerCallbacks, CallbackRet};
// Handler object
#[derive(Clone)] // Must have Clone trait implemented.
@ -38,21 +38,7 @@ impl HandlerCallbacks for Handler {
fn main() {
// Create new SSLRelay object
let mut relay = sslrelay::SSLRelay::new(
Handler,
RelayConfig {
downstream_data_type: TCPDataType::TLS,
upstream_data_type: TCPDataType::TLS,
bind_host: "0.0.0.0".to_string(),
bind_port: "443".to_string(),
remote_host: "remote.com".to_string(),
remote_port: "443".to_string(),
tls_config: TLSConfig::FILE{
certificate_path: "./tls.crt".to_string(),
private_key_path: "./tls.key".to_string(),
},
}
);
let mut relay = sslrelay::SSLRelay::new(Handler, ConfigType::Default);
// Start listening
relay.start();

8
relay_config.example.toml Normal file
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@ -0,0 +1,8 @@
bind_host = "0.0.0.0"
bind_port = "443"
ssl_private_key_path = "./ssl.key"
ssl_cert_path = "./ssl.crt"
remote_host = "remote.com"
remote_port = "443"
downstream_data_type = "tls"
upstream_data_type = "tls"

8
rustfmt.toml
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@ -1,8 +0,0 @@
hard_tabs = true
newline_style = "unix"
unstable_features = true
format_code_in_doc_comments = true
format_macro_bodies = true
format_macro_matchers = true
format_strings = true

734
src/data.rs
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@ -1,370 +1,434 @@
use crate::{
io, mpsc, DataPipe, DataStreamType, DownStreamInner, Duration, FullDuplexTcpState, Read,
Receiver, Sender, Shutdown, UpStreamInner, Write,
DownStreamInner,
UpStreamInner,
FullDuplexTcpState,
DataPipe,
DataStreamType,
Sender,
Receiver,
Shutdown,
mpsc,
Duration,
Read,
Write,
io,
};
impl DownStreamInner {
fn handle_error(error_description: &str) {
println!("[SSLRelay DownStream Thread Error]: {}", error_description);
}
pub fn ds_handler(self, data_out: Sender<FullDuplexTcpState>, data_in: Receiver<DataPipe>) {
match &self.ds_stream {
DataStreamType::RAW(_) => self.handle_raw(data_out, data_in),
DataStreamType::TLS(_) => self.handle_tls(data_out, data_in),
}
}
fn handle_error(error_description: &str) {
println!("[SSLRelay DownStream Thread Error]: {}", error_description);
}
fn handle_raw(mut self, data_out: Sender<FullDuplexTcpState>, data_in: Receiver<DataPipe>) {
let mut raw_stream = match &self.ds_stream {
DataStreamType::RAW(ref s) => s,
_ => return,
};
pub fn ds_handler(self, data_out: Sender<FullDuplexTcpState>, data_in: Receiver<DataPipe>) {
loop {
match data_in.recv_timeout(Duration::from_millis(50)) {
// DataPipe Received
Ok(data_received) => match data_received {
DataPipe::DataWrite(data) => {
match raw_stream.write_all(&data) {
Ok(()) => {}
Err(_e) => {
Self::handle_error(
"Failed to write data to DownStream tcp stream!",
);
let _ = data_out.send(FullDuplexTcpState::DownStreamShutDown);
let _ = raw_stream.shutdown(Shutdown::Both);
return;
}
}
let _ = raw_stream.flush();
}
DataPipe::Shutdown => {
let _ = raw_stream.shutdown(Shutdown::Both);
return;
}
},
Err(_e) => match _e {
mpsc::RecvTimeoutError::Timeout => {}
mpsc::RecvTimeoutError::Disconnected => {
Self::handle_error("DownStream data_in channel is disconnected!");
return;
}
},
} // End of data_in receive
match &self.ds_stream {
DataStreamType::RAW(_) => self.handle_raw(data_out, data_in),
DataStreamType::TLS(_) => self.handle_tls(data_out, data_in),
}
}
// If received data
if let Some(byte_count) =
Self::get_data_stream(&mut raw_stream, &mut self.internal_data_buffer)
{
if byte_count > 0 {
if let Err(_e) = data_out.send(FullDuplexTcpState::UpStreamWrite(
self.internal_data_buffer.clone(),
)) {
//Self::handle_error(format!("Failed to send UpStreamWrite to main thread: {}", e).as_str());
let _ = raw_stream.shutdown(Shutdown::Both);
return;
}
fn handle_raw(mut self, data_out: Sender<FullDuplexTcpState>, data_in: Receiver<DataPipe>) {
self.internal_data_buffer.clear();
} else if byte_count == 0 || byte_count == -2 {
let _ = data_out.send(FullDuplexTcpState::DownStreamShutDown);
let _ = raw_stream.shutdown(Shutdown::Both);
return;
} else if byte_count == -1 {
continue;
}
} else {
}
}
}
let mut raw_stream = match &self.ds_stream {
DataStreamType::RAW(ref s) => s,
_ => return,
};
fn handle_tls(mut self, data_out: Sender<FullDuplexTcpState>, data_in: Receiver<DataPipe>) {
let mut tls_stream = match self.ds_stream {
DataStreamType::TLS(ref mut s) => s,
_ => return,
};
loop {
loop {
match data_in.recv_timeout(Duration::from_millis(50)) {
// DataPipe Received
Ok(data_received) => match data_received {
DataPipe::DataWrite(data) => {
match tls_stream.write_all(&data) {
Ok(()) => {}
Err(_e) => {
Self::handle_error(
"Failed to write data to DownStream tcp stream!",
);
let _ = data_out.send(FullDuplexTcpState::DownStreamShutDown);
let _ = tls_stream.shutdown();
return;
}
}
let _ = tls_stream.flush();
}
DataPipe::Shutdown => {
let _ = tls_stream.shutdown();
return;
}
},
Err(_e) => match _e {
mpsc::RecvTimeoutError::Timeout => {}
mpsc::RecvTimeoutError::Disconnected => {
Self::handle_error("DownStream data_in channel is disconnected!");
return;
}
},
} // End of data_in receive
match data_in.recv_timeout(Duration::from_millis(50)) {
// If received data
if let Some(byte_count) =
Self::get_data_stream(&mut tls_stream, &mut self.internal_data_buffer)
{
if byte_count > 0 {
if let Err(_e) = data_out.send(FullDuplexTcpState::UpStreamWrite(
self.internal_data_buffer.clone(),
)) {
//Self::handle_error(format!("Failed to send UpStreamWrite to main thread: {}", e).as_str());
let _ = tls_stream.shutdown();
return;
}
// DataPipe Received
Ok(data_received) => {
self.internal_data_buffer.clear();
} else if byte_count == 0 || byte_count == -2 {
let _ = data_out.send(FullDuplexTcpState::DownStreamShutDown);
let _ = tls_stream.shutdown();
return;
} else if byte_count == -1 {
continue;
}
} else {
}
}
}
match data_received {
DataPipe::DataWrite(data) => {
fn get_data_stream<S: Read>(stream: &mut S, internal_data_buffer: &mut Vec<u8>) -> Option<i64> {
let mut data_length: i64 = 0;
match raw_stream.write_all(&data) {
Ok(()) => {},
Err(_e) => {
Self::handle_error("Failed to write data to DownStream tcp stream!");
let _ = data_out.send(FullDuplexTcpState::DownStreamShutDown);
let _ = raw_stream.shutdown(Shutdown::Both);
return;
}
}
let _ = raw_stream.flush();
loop {
let mut r_buf = [0; 1024];
},
DataPipe::Shutdown => {
let _ = raw_stream.shutdown(Shutdown::Both);
return;
},
}
},
Err(_e) => {
match _e {
mpsc::RecvTimeoutError::Timeout => {},
mpsc::RecvTimeoutError::Disconnected => {
Self::handle_error("DownStream data_in channel is disconnected!");
return;
}
}
}
}// End of data_in receive
match stream.read(&mut r_buf) {
Ok(bytes_read) => {
if bytes_read == 0 {
break;
} else if bytes_read != 0 && bytes_read <= 1024 {
/*
let mut tmp_buf = r_buf.to_vec();
tmp_buf.truncate(bytes_read);
*/
// If received data
if let Some(byte_count) = Self::get_data_stream(&mut raw_stream, &mut self.internal_data_buffer) {
if byte_count > 0 {
//let _bw = self.internal_data_buffer.write(&tmp_buf).unwrap();
if let Err(e) = data_out.send(FullDuplexTcpState::UpStreamWrite(self.internal_data_buffer.clone())) {
Self::handle_error(format!("Failed to send UpStreamWrite to main thread: {}", e).as_str());
return;
}
let _bw = internal_data_buffer
.write(r_buf.split_at(bytes_read).0)
.unwrap();
data_length += bytes_read as i64;
} else {
println!("[+] Else hit!!!!!!!!!!!!!!!!!!!!!!");
}
}
Err(e) => match e.kind() {
io::ErrorKind::WouldBlock => {
if data_length == 0 {
data_length = -1;
}
break;
}
io::ErrorKind::ConnectionReset => {
data_length = -2;
break;
}
_ => {
println!("[!!!downstream] Got error: {}", e);
}
},
}
}
return Some(data_length);
}
self.internal_data_buffer.clear();
} else if byte_count == 0 || byte_count == -2 {
let _ = data_out.send(FullDuplexTcpState::DownStreamShutDown);
let _ = raw_stream.shutdown(Shutdown::Both);
return;
} else if byte_count == -1 {
continue;
}
} else {
}
}
}
fn handle_tls(mut self, data_out: Sender<FullDuplexTcpState>, data_in: Receiver<DataPipe>) {
let mut tls_stream = match self.ds_stream {
DataStreamType::TLS(ref mut s) => s,
_ => return,
};
loop {
match data_in.recv_timeout(Duration::from_millis(50)) {
// DataPipe Received
Ok(data_received) => {
match data_received {
DataPipe::DataWrite(data) => {
match tls_stream.write_all(&data) {
Ok(()) => {},
Err(_e) => {
Self::handle_error("Failed to write data to DownStream tcp stream!");
let _ = data_out.send(FullDuplexTcpState::DownStreamShutDown);
let _ = tls_stream.shutdown();
return;
}
}
let _ = tls_stream.flush();
},
DataPipe::Shutdown => {
let _ = tls_stream.shutdown();
return;
},
}
},
Err(_e) => {
match _e {
mpsc::RecvTimeoutError::Timeout => {},
mpsc::RecvTimeoutError::Disconnected => {
Self::handle_error("DownStream data_in channel is disconnected!");
return;
}
}
}
}// End of data_in receive
// If received data
if let Some(byte_count) = Self::get_data_stream(&mut tls_stream, &mut self.internal_data_buffer) {
if byte_count > 0 {
if let Err(e) = data_out.send(FullDuplexTcpState::UpStreamWrite(self.internal_data_buffer.clone())) {
Self::handle_error(format!("Failed to send UpStreamWrite to main thread: {}", e).as_str());
let _ = tls_stream.shutdown();
return;
}
self.internal_data_buffer.clear();
} else if byte_count == 0 || byte_count == -2 {
let _ = data_out.send(FullDuplexTcpState::DownStreamShutDown);
let _ = tls_stream.shutdown();
return;
} else if byte_count == -1 {
continue;
}
} else {
}
}
}
fn get_data_stream<S: Read>(stream: &mut S, internal_data_buffer: &mut Vec<u8>) -> Option<i64> {
let mut data_length: i64 = 0;
loop {
let mut r_buf = [0; 1024];
match stream.read(&mut r_buf) {
Ok(bytes_read) => {
if bytes_read == 0 {
break;
} else if bytes_read != 0 && bytes_read <= 1024 {
/*
let mut tmp_buf = r_buf.to_vec();
tmp_buf.truncate(bytes_read);
*/
//let _bw = self.internal_data_buffer.write(&tmp_buf).unwrap();
let _bw = internal_data_buffer.write(r_buf.split_at(bytes_read).0).unwrap();
data_length += bytes_read as i64;
} else {
println!("[+] Else hit!!!!!!!!!!!!!!!!!!!!!!");
}
},
Err(e) => {
match e.kind() {
io::ErrorKind::WouldBlock => {
if data_length == 0 {
data_length = -1;
}
break;
},
io::ErrorKind::ConnectionReset => {
data_length = -2;
break;
},
_ => {println!("[!!!] Got error: {}",e);}
}
},
}
}
return Some(data_length);
}
}
impl UpStreamInner {
fn handle_error(error_description: &str) {
println!("[SSLRelay UpStream Thread Error]: {}", error_description);
}
pub fn us_handler(self, data_out: Sender<FullDuplexTcpState>, data_in: Receiver<DataPipe>) {
match &self.us_stream {
DataStreamType::RAW(_) => self.handle_raw(data_out, data_in),
DataStreamType::TLS(_) => self.handle_tls(data_out, data_in),
}
}
fn handle_error(error_description: &str) {
println!("[SSLRelay UpStream Thread Error]: {}", error_description);
}
fn handle_raw(mut self, data_out: Sender<FullDuplexTcpState>, data_in: Receiver<DataPipe>) {
let mut raw_stream = match self.us_stream {
DataStreamType::RAW(ref s) => s,
_ => return,
};
pub fn us_handler(self, data_out: Sender<FullDuplexTcpState>, data_in: Receiver<DataPipe>) {
loop {
match data_in.recv_timeout(Duration::from_millis(50)) {
Ok(data_received) => match data_received {
DataPipe::DataWrite(data) => {
match raw_stream.write_all(&data) {
Ok(()) => {}
Err(_e) => {
Self::handle_error("Failed to write data to UpStream tcp stream!");
let _ = data_out.send(FullDuplexTcpState::UpStreamShutDown);
let _ = raw_stream.shutdown(Shutdown::Both);
return;
}
}
let _ = raw_stream.flush();
}
DataPipe::Shutdown => {
let _ = raw_stream.shutdown(Shutdown::Both);
return;
}
},
Err(e) => match e {
mpsc::RecvTimeoutError::Timeout => {}
mpsc::RecvTimeoutError::Disconnected => {
Self::handle_error("UpStream data_in channel is disconnected!");
return;
}
},
} // End of data_in receive
match &self.us_stream {
DataStreamType::RAW(_) => self.handle_raw(data_out, data_in),
DataStreamType::TLS(_) => self.handle_tls(data_out, data_in),
}
if let Some(byte_count) =
Self::get_data_stream(&mut raw_stream, &mut self.internal_data_buffer)
{
if byte_count > 0 {
if let Err(_e) = data_out.send(FullDuplexTcpState::DownStreamWrite(
self.internal_data_buffer.clone(),
)) {
//Self::handle_error(format!("Failed to send DownStreamWrite to main thread: {}", e).as_str());
let _ = raw_stream.shutdown(Shutdown::Both);
return;
}
}
self.internal_data_buffer.clear();
} else if byte_count == 0 || byte_count == -2 {
let _ = data_out.send(FullDuplexTcpState::UpStreamShutDown);
let _ = raw_stream.shutdown(Shutdown::Both);
return;
} else if byte_count == -1 {
continue;
}
} else {
}
}
}
fn handle_raw(mut self, data_out: Sender<FullDuplexTcpState>, data_in: Receiver<DataPipe>) {
fn handle_tls(mut self, data_out: Sender<FullDuplexTcpState>, data_in: Receiver<DataPipe>) {
let mut tls_stream = match self.us_stream {
DataStreamType::TLS(ref mut s) => s,
_ => return,
};
let mut raw_stream = match self.us_stream {
DataStreamType::RAW(ref s) => s,
_ => return,
};
loop {
match data_in.recv_timeout(Duration::from_millis(50)) {
Ok(data_received) => match data_received {
DataPipe::DataWrite(data) => {
match tls_stream.write_all(&data) {
Ok(()) => {}
Err(_e) => {
Self::handle_error("Failed to write data to UpStream tcp stream!");
let _ = data_out.send(FullDuplexTcpState::UpStreamShutDown);
let _ = tls_stream.shutdown();
return;
}
}
let _ = tls_stream.flush();
}
DataPipe::Shutdown => {
let _ = tls_stream.shutdown();
return;
}
},
Err(e) => match e {
mpsc::RecvTimeoutError::Timeout => {}
mpsc::RecvTimeoutError::Disconnected => {
Self::handle_error("UpStream data_in channel is disconnected!");
return;
}
},
} // End of data_in receive
loop {
if let Some(byte_count) =
Self::get_data_stream(&mut tls_stream, &mut self.internal_data_buffer)
{
if byte_count > 0 {
if let Err(_e) = data_out.send(FullDuplexTcpState::DownStreamWrite(
self.internal_data_buffer.clone(),
)) {
//Self::handle_error(format!("Failed to send DownStreamWrite to main thread: {}", e).as_str());
let _ = tls_stream.shutdown();
return;
}
match data_in.recv_timeout(Duration::from_millis(50)) {
self.internal_data_buffer.clear();
} else if byte_count == 0 || byte_count == -2 {
let _ = data_out.send(FullDuplexTcpState::UpStreamShutDown);
let _ = tls_stream.shutdown();
return;
} else if byte_count == -1 {
continue;
}
} else {
}
}
}
Ok(data_received) => {
fn get_data_stream<S: Read>(stream: &mut S, internal_data_buffer: &mut Vec<u8>) -> Option<i64> {
let mut data_length: i64 = 0;
match data_received {
DataPipe::DataWrite(data) => {
loop {
let mut r_buf = [0; 1024];
match raw_stream.write_all(&data) {
Ok(()) => {},
Err(_e) => {
Self::handle_error("Failed to write data to UpStream tcp stream!");
let _ = data_out.send(FullDuplexTcpState::UpStreamShutDown);
let _ = raw_stream.shutdown(Shutdown::Both);
return;
}
}
let _ = raw_stream.flush();
},
DataPipe::Shutdown => {
let _ = raw_stream.shutdown(Shutdown::Both);
return;
}
}
},
Err(e) => {
match e {
mpsc::RecvTimeoutError::Timeout => {},
mpsc::RecvTimeoutError::Disconnected => {
Self::handle_error("UpStream data_in channel is disconnected!");
return;
}
}
}
}// End of data_in receive
match stream.read(&mut r_buf) {
Ok(bytes_read) => {
if bytes_read == 0 {
break;
} else if bytes_read != 0 && bytes_read <= 1024 {
/*
let mut tmp_buf = r_buf.to_vec();
tmp_buf.truncate(bytes_read);
*/
if let Some(byte_count) = Self::get_data_stream(&mut raw_stream, &mut self.internal_data_buffer) {
if byte_count > 0 {
//let _bw = self.internal_data_buffer.write(&tmp_buf).unwrap();
if let Err(e) = data_out.send(FullDuplexTcpState::DownStreamWrite(self.internal_data_buffer.clone())) {
Self::handle_error(format!("Failed to send DownStreamWrite to main thread: {}", e).as_str());
return;
}
let _bw = internal_data_buffer
.write(r_buf.split_at(bytes_read).0)
.unwrap();
data_length += bytes_read as i64;
} else {
println!("[+] Else hit!!!!!!!!!!!!!!!!!!!!!!");
}
}
Err(e) => match e.kind() {
io::ErrorKind::WouldBlock => {
if data_length == 0 {
data_length = -1;
}
break;
}
io::ErrorKind::ConnectionReset => {
data_length = -2;
break;
}
_ => {
println!("[!!!upstream] Got error: {}", e);
}
},
}
}
return Some(data_length);
}
}
self.internal_data_buffer.clear();
} else if byte_count == 0 || byte_count == -2 {
let _ = data_out.send(FullDuplexTcpState::UpStreamShutDown);
let _ = raw_stream.shutdown(Shutdown::Both);
return;
} else if byte_count == -1 {
continue;
}
} else {
}
}
}
fn handle_tls(mut self, data_out: Sender<FullDuplexTcpState>, data_in: Receiver<DataPipe>) {
let mut tls_stream = match self.us_stream {
DataStreamType::TLS(ref mut s) => s,
_ => return,
};
loop {
match data_in.recv_timeout(Duration::from_millis(50)) {
Ok(data_received) => {
match data_received {
DataPipe::DataWrite(data) => {
match tls_stream.write_all(&data) {
Ok(()) => {},
Err(_e) => {
Self::handle_error("Failed to write data to UpStream tcp stream!");
let _ = data_out.send(FullDuplexTcpState::UpStreamShutDown);
let _ = tls_stream.shutdown();
return;
}
}
let _ = tls_stream.flush();
},
DataPipe::Shutdown => {
let _ = tls_stream.shutdown();
return;
}
}
},
Err(e) => {
match e {
mpsc::RecvTimeoutError::Timeout => {},
mpsc::RecvTimeoutError::Disconnected => {
Self::handle_error("UpStream data_in channel is disconnected!");
return;
}
}
}
}// End of data_in receive
if let Some(byte_count) = Self::get_data_stream(&mut tls_stream, &mut self.internal_data_buffer) {
if byte_count > 0 {
if let Err(e) = data_out.send(FullDuplexTcpState::DownStreamWrite(self.internal_data_buffer.clone())) {
Self::handle_error(format!("Failed to send DownStreamWrite to main thread: {}", e).as_str());
return;
}
self.internal_data_buffer.clear();
} else if byte_count == 0 || byte_count == -2 {
let _ = data_out.send(FullDuplexTcpState::UpStreamShutDown);
let _ = tls_stream.shutdown();
return;
} else if byte_count == -1 {
continue;
}
} else {
}
}
}
fn get_data_stream<S: Read>(stream: &mut S, internal_data_buffer: &mut Vec<u8>) -> Option<i64> {
let mut data_length: i64 = 0;
loop {
let mut r_buf = [0; 1024];
match stream.read(&mut r_buf) {
Ok(bytes_read) => {
if bytes_read == 0 {
break;
} else if bytes_read != 0 && bytes_read <= 1024 {
/*
let mut tmp_buf = r_buf.to_vec();
tmp_buf.truncate(bytes_read);
*/
//let _bw = self.internal_data_buffer.write(&tmp_buf).unwrap();
let _bw = internal_data_buffer.write(r_buf.split_at(bytes_read).0).unwrap();
data_length += bytes_read as i64;
} else {
println!("[+] Else hit!!!!!!!!!!!!!!!!!!!!!!");
}
},
Err(e) => {
match e.kind() {
io::ErrorKind::WouldBlock => {
if data_length == 0 {
data_length = -1;
}
break;
},
io::ErrorKind::ConnectionReset => {
data_length = -2;
break;
},
_ => {println!("[!!!] Got error: {}",e);}
}
},
}
}
return Some(data_length);
}
}

290
src/lib.rs
View file

@ -1,226 +1,240 @@
//! ## SSLRelay
//! Library for relaying TCP traffic as well as TLS encrypted TCP traffic.
//! This library allows you to implement callback functions for upstream and downstream traffic.
//! This Library allows you to implement callback functions for upstream and downstream traffic.
//! These callbacks can R/W the data from a stream(Blocking) or only R the data(Non-Blocking).
//!```
//! pub trait HandlerCallbacks {
//! fn ds_b_callback(&mut self, _in_data: Vec<u8>) -> CallbackRet {
//! CallbackRet::Relay(_in_data)
//! }
//! fn ds_nb_callback(&self, _in_data: Vec<u8>) {}
//! fn us_b_callback(&mut self, _in_data: Vec<u8>) -> CallbackRet {
//! CallbackRet::Relay(_in_data)
//! }
//! fn us_nb_callback(&self, _in_data: Vec<u8>) {}
//! }
//! ```
//!pub trait HandlerCallbacks {
//! fn ds_b_callback(&mut self, _in_data: Vec<u8>) -> CallbackRet {CallbackRet::Relay(_in_data)}
//! fn ds_nb_callback(&self, _in_data: Vec<u8>){}
//! fn us_b_callback(&mut self, _in_data: Vec<u8>) -> CallbackRet {CallbackRet::Relay(_in_data)}
//! fn us_nb_callback(&self, _in_data: Vec<u8>){}
//!}
//!```
//! The blocking callbacks return an enum called CallbackRet with four different variants.
//! The variants control the flow of the tcp stream.
//!```
//! pub enum CallbackRet {
//! Relay(Vec<u8>), // Relay data
//! Spoof(Vec<u8>), // Skip relaying and send data back
//! Shutdown, // Shutdown TCP connection
//! Freeze, // Dont send data (pretend as if stream never was recieved)
//! Relay(Vec<u8>),// Relay data
//! Spoof(Vec<u8>),// Skip relaying and send data back
//! Shutdown,// Shutdown TCP connection
//! Freeze,// Dont send data (pretend as if stream never was recieved)
//! }
//! ```
//! ## Example (basic.rs)
//! ```
//! use sslrelay::{self, CallbackRet, HandlerCallbacks, RelayConfig, TCPDataType, TLSConfig};
//!
//! use sslrelay::{self, ConfigType, RelayConfig, HandlerCallbacks, CallbackRet, TCPDataType};
//!
//! // Handler object
//! #[derive(Clone)] // Must have Clone trait implemented.
//! struct Handler;
//!
//!
//! /*
//! Callback traits that can be used to read or inject data
//! into data upstream or downstream.
//! Callback traits that can be used to read or inject data
//! into data upstream or downstream.
//! */
//! impl HandlerCallbacks for Handler {
//! // DownStream non blocking callback (Read Only)
//! fn ds_nb_callback(&self, _in_data: Vec<u8>) {
//! println!("[CALLBACK] Down Stream Non Blocking CallBack!");
//! }
//!
//! // DownStream blocking callback (Read & Write)
//! fn ds_b_callback(&mut self, _in_data: Vec<u8>) -> CallbackRet {
//! println!("[CALLBACK] Down Stream Blocking CallBack!");
//! CallbackRet::Relay(_in_data)
//! }
//!
//! // UpStream non blocking callback (Read Only)
//! fn us_nb_callback(&self, _in_data: Vec<u8>) {
//! println!("[CALLBACK] Up Stream Non Blocking CallBack!");
//! }
//!
//! // UpStream blocking callback (Read & Write)
//! fn us_b_callback(&mut self, _in_data: Vec<u8>) -> CallbackRet {
//! println!("[CALLBACK] Up Stream Blocking CallBack!");
//! CallbackRet::Relay(_in_data)
//! }
//!
//! // DownStream non blocking callback (Read Only)
//! fn ds_nb_callback(&self, _in_data: Vec<u8>) {
//! println!("[CALLBACK] Down Stream Non Blocking CallBack!");
//! }
//!
//! // DownStream blocking callback (Read & Write)
//! fn ds_b_callback(&mut self, _in_data: Vec<u8>) -> CallbackRet {
//! println!("[CALLBACK] Down Stream Blocking CallBack!");
//! CallbackRet::Relay(_in_data)
//! }
//!
//! // UpStream non blocking callback (Read Only)
//! fn us_nb_callback(&self, _in_data: Vec<u8>) {
//! println!("[CALLBACK] Up Stream Non Blocking CallBack!");
//! }
//!
//! // UpStream blocking callback (Read & Write)
//! fn us_b_callback(&mut self, _in_data: Vec<u8>) -> CallbackRet {
//! println!("[CALLBACK] Up Stream Blocking CallBack!");
//! CallbackRet::Relay(_in_data)
//! }
//! }
//!
//!
//! fn main() {
//! // Create new SSLRelay object
//! let mut relay = sslrelay::SSLRelay::new(
//! Handler,
//! RelayConfig {
//! downstream_data_type: TCPDataType::TLS,
//! upstream_data_type: TCPDataType::TLS,
//! bind_host: "0.0.0.0".to_string(),
//! bind_port: "443".to_string(),
//! remote_host: |_| "remote.com",
//! remote_port: "443".to_string(),
//! tls_config: TLSConfig::FILE {
//! certificate_path: "./tls.crt".to_string(),
//! private_key_path: "./tls.key".to_string(),
//! },
//! },
//! );
//!
//! // Start listening
//! relay.start();
//!
//! // Create new SSLRelay object
//! let mut relay = sslrelay::SSLRelay::new(
//! Handler,
//! ConfigType::Conf(RelayConfig {
//! downstream_data_type: TCPDataType::TLS,
//! upstream_data_type: TCPDataType::TLS,
//! bind_host: "0.0.0.0".to_string(),
//! bind_port: "443".to_string(),
//! remote_host: "remote.com".to_string(),
//! remote_port: "443".to_string(),
//! ssl_private_key_path: Some("./remote.com.key".to_string()),
//! ssl_cert_path: Some("./remote.com.crt".to_string()),
//! })
//! );
//! // Start listening
//! relay.start();
//! }
//! ```
use openssl::{
pkey::PKey,
ssl::{SslAcceptor, SslConnector, SslFiletype, SslMethod, SslStream, SslVerifyMode},
x509::X509,
use openssl::ssl::{
SslVerifyMode,
SslConnector,
SslAcceptor,
SslStream,
SslFiletype,
SslMethod
};
use std::net::{Shutdown, TcpListener, TcpStream};
use std::net::{
TcpListener,
TcpStream,
Shutdown
};
use std::sync::{Arc, Mutex};
use std::sync::{
Arc,
Mutex
};
use std::thread;
use std::{
process,
thread
};
use std::{path::Path, time::Duration};
use std::{
env,
fs,
path::Path,
time::Duration,
};
use std::io::{self, Read, Write};
use std::io::{
self,
Read,
Write
};
use std::sync::mpsc::{self, Receiver, Sender};
use std::sync::mpsc::{
self,
Receiver,
Sender
};
use toml::Value as TValue;
mod data;
mod relay;
mod tcp;
mod relay;
#[derive(Debug)]
enum FullDuplexTcpState {
DownStreamWrite(Vec<u8>),
UpStreamWrite(Vec<u8>),
DownStreamShutDown,
UpStreamShutDown,
DownStreamWrite(Vec<u8>),
UpStreamWrite(Vec<u8>),
DownStreamShutDown,
UpStreamShutDown,
}
#[derive(Debug)]
enum DataPipe {
DataWrite(Vec<u8>),
Shutdown,
DataWrite(Vec<u8>),
Shutdown,
}
enum DataStreamType {
RAW(TcpStream),
TLS(SslStream<TcpStream>),
RAW(TcpStream),
TLS(SslStream<TcpStream>),
}
/// Specifies the upstream or downstream data type (TLS or RAW).
#[derive(Copy, Clone)]
pub enum TCPDataType {
TLS,
RAW,
TLS,
RAW,
}
/// TLSConfig is used to specify TLS options.
/// FILE is for specifying a path to a certificate and private key.
/// DATA is for passing the certificate and private key bytes directly.
/// NONE is for when you are not using TLS on the listening/downstream side of the relay.
#[derive(Clone)]
pub enum TLSConfig {
FILE {
certificate_path: String,
private_key_path: String,
},
DATA {
certificate: Vec<u8>,
private_key: Vec<u8>,
},
NONE,
/// The relay configuration type.
/// Env: Uses the SSLRELAY_CONFIG environmental variable for the path to the config file.
/// Path: Specifies the path to the config file.
/// Conf: For passing an instance of the object instead of using a config file.
/// Default: Uses ./relay_config.toml config file.
pub enum ConfigType<T> {
Env,
Path(T),
Conf(RelayConfig),
Default,
}
/// Relay Config structure for passing into the SSLRelay::new() config parameter.
#[derive(Clone)]
pub struct RelayConfig {
pub downstream_data_type: TCPDataType,
pub upstream_data_type: TCPDataType,
pub bind_host: String,
pub bind_port: String,
pub remote_host: fn(Option<&str>) -> String,
//pub remote_host: String,
pub remote_port: String,
pub tls_config: TLSConfig,
pub downstream_data_type: TCPDataType,
pub upstream_data_type: TCPDataType,
pub bind_host: String,
pub bind_port: String,
pub remote_host: String,
pub remote_port: String,
pub ssl_private_key_path: Option<String>,
pub ssl_cert_path: Option<String>,
}
/// CallbackRet for blocking callback functions
#[derive(Debug)]
pub enum CallbackRet {
Relay(Vec<u8>), // Relay data
Spoof(Vec<u8>), // Skip relaying and send data back
Shutdown, // Shutdown TCP connection
Freeze, // Dont send data (pretend as if stream never was recieved)
Relay(Vec<u8>),// Relay data
Spoof(Vec<u8>),// Skip relaying and send data back
Shutdown,// Shutdown TCP connection
Freeze,// Dont send data (pretend as if stream never was recieved)
}
/// Callback functions a user may or may not implement.
pub trait HandlerCallbacks {
fn ds_b_callback(&mut self, _in_data: Vec<u8>, _conn_id: u64) -> CallbackRet {
CallbackRet::Relay(_in_data)
}
fn ds_nb_callback(&self, _in_data: Vec<u8>, _conn_id: u64) {}
fn us_b_callback(&mut self, _in_data: Vec<u8>, _conn_id: u64) -> CallbackRet {
CallbackRet::Relay(_in_data)
}
fn us_nb_callback(&self, _in_data: Vec<u8>, _conn_id: u64) {}
fn set_server_name(&mut self, _server_name: Option<&str>) {}
fn ds_b_callback(&mut self, _in_data: Vec<u8>) -> CallbackRet {CallbackRet::Relay(_in_data)}
fn ds_nb_callback(&self, _in_data: Vec<u8>){}
fn us_b_callback(&mut self, _in_data: Vec<u8>) -> CallbackRet {CallbackRet::Relay(_in_data)}
fn us_nb_callback(&self, _in_data: Vec<u8>){}
}
/// The main SSLRelay object.
#[derive(Clone)]
pub struct SSLRelay<H>
where
H: HandlerCallbacks + std::marker::Sync + std::marker::Send + Clone + 'static,
H: HandlerCallbacks + std::marker::Sync + std::marker::Send + Clone + 'static,
{
config: RelayConfig,
handlers: Option<InnerHandlers<H>>,
config: RelayConfig,
handlers: Option<InnerHandlers<H>>,
}
#[allow(dead_code)]
struct FullDuplexTcp<H>
where
H: HandlerCallbacks + std::marker::Sync + std::marker::Send + Clone + 'static,
H: HandlerCallbacks + std::marker::Sync + std::marker::Send + Clone + 'static,
{
remote_host: String,
remote_port: String,
ds_inner_m: Arc<Mutex<Option<DownStreamInner>>>,
us_inner_m: Arc<Mutex<Option<UpStreamInner>>>,
inner_handlers: InnerHandlers<H>,
conn_id: u64,
remote_host: String,
remote_port: String,
ds_inner_m: Arc<Mutex<Option<DownStreamInner>>>,
us_inner_m: Arc<Mutex<Option<UpStreamInner>>>,
inner_handlers: InnerHandlers<H>,
}
#[derive(Clone)]
struct InnerHandlers<H>
where
H: HandlerCallbacks + std::marker::Sync + std::marker::Send + Clone + 'static,
H: HandlerCallbacks + std::marker::Sync + std::marker::Send + Clone + 'static,
{
cb: H,
cb: H
}
struct DownStreamInner {
ds_stream: DataStreamType,
internal_data_buffer: Vec<u8>,
struct DownStreamInner
{
ds_stream: DataStreamType,
internal_data_buffer: Vec<u8>,
}
struct UpStreamInner {
us_stream: DataStreamType,
internal_data_buffer: Vec<u8>,
}
struct UpStreamInner
{
us_stream: DataStreamType,
internal_data_buffer: Vec<u8>
}

395
src/relay.rs
View file

@ -1,221 +1,208 @@
//! SSLRelay
use crate::{
thread, Arc, DataStreamType, FullDuplexTcp, HandlerCallbacks, InnerHandlers, PKey, Path,
RelayConfig, SSLRelay, SslAcceptor, SslFiletype, SslMethod, TCPDataType, TLSConfig,
TcpListener, X509,
SSLRelay,
HandlerCallbacks,
InnerHandlers,
TCPDataType,
ConfigType,
TcpListener,
thread,
FullDuplexTcp,
DataStreamType,
RelayConfig,
env,
TValue,
fs,
process,
Arc,
SslAcceptor,
Path,
SslMethod,
SslFiletype,
};
impl<H: HandlerCallbacks + std::marker::Sync + std::marker::Send + Clone + 'static> SSLRelay<H> {
/// Creates new SSLRelay instance.
pub fn new(handlers: H, config: RelayConfig) -> Self {
SSLRelay {
config,
handlers: Some(InnerHandlers { cb: handlers }),
}
}
/// Starts the SSLRelay connection handling.
pub fn start(&mut self) {
let rhost = self.config.remote_host.clone();
let rport = self.config.remote_port.clone();
let upstream_data_stream_type = self.config.upstream_data_type;
/// Creates new SSLRelay instance.
pub fn new(handlers: H, config: ConfigType<String>) -> Self {
let listener = TcpListener::bind(format!(
"{}:{}",
self.config.bind_host.clone(),
self.config.bind_port.clone()
))
.unwrap();
SSLRelay {
config: Self::load_relay_config(config),
handlers: Some(InnerHandlers{cb: handlers}),
}
}
/// Starts the SSLRelay connection handling.
pub fn start(&mut self) {
let mut conn_id = 0;
match self.config.downstream_data_type {
TCPDataType::TLS => {
let acceptor = self.setup_ssl_config(&self.config.tls_config);
let rhost = self.config.remote_host.clone();
let rport = self.config.remote_port.clone();
let listener = TcpListener::bind(format!("{}:{}", self.config.bind_host.clone(), self.config.bind_port.clone())).unwrap();
let upstream_data_stream_type = self.config.upstream_data_type;
for stream in listener.incoming() {
match stream {
Ok(stream) => {
let acceptor = acceptor.clone();
let mut handler_clone = self.handlers.as_ref().unwrap().clone();
match self.config.downstream_data_type {
let r_host = rhost.clone();
let r_port = rport.clone();
TCPDataType::TLS => {
let acceptor = self.setup_ssl_config(self.config.ssl_private_key_path.clone(), self.config.ssl_cert_path.clone());
let this_conn_id = conn_id;
thread::spawn(move || {
match acceptor.accept(stream) {
Ok(stream) => {
let server_name = stream
.ssl()
.servername(openssl::ssl::NameType::HOST_NAME);
handler_clone.cb.set_server_name(server_name);
let remote_host = (r_host)(server_name);
// FULL DUPLEX OBJECT CREATION HERE
match FullDuplexTcp::new(
DataStreamType::TLS(stream),
upstream_data_stream_type,
remote_host,
r_port,
handler_clone,
this_conn_id,
) {
Ok(mut fdtcp) => fdtcp.handle(),
Err(_ec) => {
println!(
"[SSLRelay Error] Failed to handle TCP(TLS) \
connection: {}",
_ec
)
}
}
}
Err(e) => {
println!("[Error] {}", e);
}
}
});
conn_id += 1;
}
Err(e) => {
println!("[Error] Tcp Connection Failed: {}", e)
}
}
}
}
for stream in listener.incoming() {
match stream {
Ok(stream) => {
let acceptor = acceptor.clone();
let handler_clone = self.handlers.as_ref().unwrap().clone();
let r_host = rhost.clone();
let r_port = rport.clone();
thread::spawn(move || {
match acceptor.accept(stream) {
Ok(stream) => {
// FULL DUPLEX OBJECT CREATION HERE
match FullDuplexTcp::new(DataStreamType::TLS(stream), upstream_data_stream_type, r_host, r_port, handler_clone) {
Ok(mut fdtcp) => fdtcp.handle(),
Err(_ec) => {}
}
},
Err(e) => {
println!("[Error] {}", e);
}
}
});
},
Err(e) => {println!("[Error] Tcp Connection Failed: {}", e)}
}
}
},
TCPDataType::RAW => {
for stream in listener.incoming() {
match stream {
Ok(stream) => {
let handler_clone = self.handlers.as_ref().unwrap().clone();
TCPDataType::RAW => {
let r_host = rhost.clone();
let r_port = rport.clone();
for stream in listener.incoming() {
match stream {
Ok(stream) => {
let handler_clone = self.handlers.as_ref().unwrap().clone();
let r_host = rhost.clone();
let r_port = rport.clone();
thread::spawn(move || {
// FULL DUPLEX OBJECT CREATION HERE
match FullDuplexTcp::new(DataStreamType::RAW(stream), upstream_data_stream_type, r_host, r_port, handler_clone) {
Ok(mut fdtcp) => fdtcp.handle(),
Err(_ec) => {},
}
let this_conn_id = conn_id;
thread::spawn(move || {
// FULL DUPLEX OBJECT CREATION HERE
match FullDuplexTcp::new(
DataStreamType::RAW(stream),
upstream_data_stream_type,
(r_host)(None),
r_port,
handler_clone,
this_conn_id,
) {
Ok(mut fdtcp) => fdtcp.handle(),
Err(_ec) => println!(
"[SSLRelay Error] Failed to handle TCP connection: {}",
_ec
),
}
});
conn_id += 1;
}
Err(e) => {
println!("[Error] Tcp Connection Failed: {}", e)
}
}
}
}
}
}
});
},
Err(e) => {println!("[Error] Tcp Connection Failed: {}", e)}
}
}
}
}
}
fn setup_ssl_config(&self, tls_config: &TLSConfig) -> Arc<SslAcceptor> {
let mut acceptor = SslAcceptor::mozilla_intermediate(SslMethod::tls()).unwrap();
match tls_config {
TLSConfig::FILE {
certificate_path,
private_key_path,
} => {
if !Path::new(&private_key_path).exists() {
panic!("[-] [{}] does not exist!", private_key_path);
}
if !Path::new(&certificate_path).exists() {
panic!("[-] [{}] does not exist!", certificate_path);
}
acceptor
.set_private_key_file(private_key_path, SslFiletype::PEM)
.unwrap();
acceptor
.set_certificate_chain_file(certificate_path)
.unwrap();
acceptor.check_private_key().unwrap();
}
TLSConfig::DATA {
certificate,
private_key,
} => {
let x_509_certificate = X509::from_pem(certificate.as_slice()).unwrap();
let private_key = PKey::private_key_from_pem(private_key.as_slice()).unwrap();
acceptor
.set_certificate(x_509_certificate.as_ref())
.unwrap();
acceptor.set_private_key(private_key.as_ref()).unwrap();
}
TLSConfig::NONE => {
panic!(
"[SSLRelay Error] Specified NONE for TLSConfig and downstream_data_type as \
TLS."
);
}
}
Arc::new(acceptor.build())
}
fn load_relay_config(config: ConfigType<String>) -> RelayConfig {
// fn setup_ssl_config(&self, tls_configs: &[(&[&str], TLSConfig)]) -> AcceptorDb {
// let mut acceptor_db = AcceptorDb {
// acceptors: HashMap::new(),
// };
// for (names, tls_config) in tls_configs {
// let mut acceptor = SslAcceptor::mozilla_intermediate(SslMethod::tls()).unwrap();
// match tls_config {
// TLSConfig::FILE {
// certificate_path,
// private_key_path,
// } => {
// if !Path::new(&private_key_path).exists() {
// panic!("[-] [{}] does not exist!", private_key_path);
// }
// if !Path::new(&certificate_path).exists() {
// panic!("[-] [{}] does not exist!", certificate_path);
// }
// acceptor
// .set_private_key_file(private_key_path, SslFiletype::PEM)
// .unwrap();
// acceptor
// .set_certificate_chain_file(certificate_path)
// .unwrap();
// acceptor.check_private_key().unwrap();
// }
// TLSConfig::DATA {
// certificate,
// private_key,
// } => {
// let x_509_certificate = X509::from_pem(certificate.as_slice()).unwrap();
// let private_key = PKey::private_key_from_pem(private_key.as_slice()).unwrap();
// acceptor
// .set_certificate(x_509_certificate.as_ref())
// .unwrap();
// acceptor.set_private_key(private_key.as_ref()).unwrap();
// }
// TLSConfig::NONE => {
// panic!(
// "[SSLRelay Error] Specified NONE for TLSConfig and downstream_data_type as \
// TLS."
// );
// }
// }
// let acceptor = Arc::new(acceptor.build());
// for name in *names {
// acceptor_db.acceptors.insert(name.to_string(), acceptor.clone());
// }
// }
// acceptor_db
// }
} // SSLRelay
let mut resolved_path = String::from("./relay_config.toml");
match config {
ConfigType::Path(path) => {
resolved_path = path.clone();
},
ConfigType::Env => {
resolved_path = match env::var("SSLRELAY_CONFIG") {
Ok(p) => p.clone(),
Err(_e) => {
println!("[-] Environmental variable SSLRELAY_CONFIG does not exist.");
std::process::exit(-1);
}
};
},
ConfigType::Conf(conf) => {
return conf;
}
ConfigType::Default => {}
}
// struct AcceptorDb {
// acceptors: HashMap<String, Arc<SslAcceptor>>,
// }
let bytes = fs::read(resolved_path).unwrap();
let config_file = String::from_utf8_lossy(&bytes);
let config_parsed = config_file.parse::<TValue>().unwrap();
let bind_host = config_parsed["bind_host"].to_string().replace("\"", "");
let bind_port = config_parsed["bind_port"].to_string().replace("\"", "");
let ssl_private_key_path = config_parsed["ssl_private_key_path"].to_string().replace("\"", "");
let ssl_cert_path = config_parsed["ssl_cert_path"].to_string().replace("\"", "");
let remote_host = config_parsed["remote_host"].to_string().replace("\"", "");
let remote_port = config_parsed["remote_port"].to_string().replace("\"", "");
let upstream_tls_conf = config_parsed["upstream_data_type"].to_string().replace("\"", "").to_lowercase();
let downstream_tls_conf = config_parsed["downstream_data_type"].to_string().replace("\"", "").to_lowercase();
let upstream_data_type: TCPDataType;
let downstream_data_type: TCPDataType;
if upstream_tls_conf == "tls" {
upstream_data_type = TCPDataType::TLS;
} else if upstream_tls_conf == "raw" {
upstream_data_type = TCPDataType::RAW;
} else {
panic!("[SSLRelay Error] Unrecognized TCPDataType for upstream_data_type. Data type received was not 'tcp' or 'tls'!");
// Create error handling for load_relay_config()
}
if downstream_tls_conf == "tls" {
downstream_data_type = TCPDataType::TLS;
} else if downstream_tls_conf == "raw" {
downstream_data_type = TCPDataType::RAW;
} else {
panic!("[SSLRelay Error] Unrecognized TCPDataType for downstream_data_type. Data type received was not 'tcp' or 'tls'!");
// Create error handling for load_relay_config()
}
let mut ssl_pk_path = None;
let mut ssl_c_path = None;
if !ssl_private_key_path.is_empty() {
ssl_pk_path = Some(ssl_private_key_path.clone());
}
if !ssl_cert_path.is_empty() {
ssl_c_path = Some(ssl_cert_path.clone());
}
RelayConfig {
upstream_data_type,
downstream_data_type,
bind_host: bind_host.clone(),
bind_port: bind_port.clone(),
ssl_private_key_path: ssl_pk_path,
ssl_cert_path: ssl_c_path,
remote_host: remote_host.clone(),
remote_port: remote_port.clone(),
}
}
fn setup_ssl_config(&self, priv_key: Option<String>, cert: Option<String>) -> Arc<SslAcceptor> {
let mut acceptor = SslAcceptor::mozilla_intermediate(SslMethod::tls()).unwrap();
let private_key = priv_key.expect("[SSLRelay Error] No private key file specified!");
let certificate = cert.expect("[SSLRelay Error] No certificate file specified!");
if !Path::new(&private_key).exists() {
panic!("[-] [{}] does not exist!", private_key);
}
acceptor.set_private_key_file(private_key, SslFiletype::PEM).unwrap();
if !Path::new(&certificate).exists() {
panic!("[-] [{}] does not exist!", certificate);
}
acceptor.set_certificate_chain_file(certificate).unwrap();
acceptor.check_private_key().unwrap();
Arc::new(acceptor.build())
}
}// SSLRelay

581
src/tcp.rs
View file

@ -1,368 +1,259 @@
use crate::{
mpsc, thread, Arc, CallbackRet, DataPipe, DataStreamType, DownStreamInner, Duration,
FullDuplexTcp, FullDuplexTcpState, HandlerCallbacks, InnerHandlers, Mutex, Receiver, Sender,
Shutdown, SslConnector, SslMethod, SslVerifyMode, TCPDataType, TcpStream, UpStreamInner,
FullDuplexTcp,
HandlerCallbacks,
DataStreamType,
TCPDataType,
Duration,
Arc,
Mutex,
DownStreamInner,
UpStreamInner,
InnerHandlers,
Shutdown,
Sender,
Receiver,
FullDuplexTcpState,
DataPipe,
mpsc,
thread,
CallbackRet,
TcpStream,
SslVerifyMode,
SslConnector,
SslMethod,
};
impl<H: HandlerCallbacks + std::marker::Sync + std::marker::Send + Clone + 'static>
FullDuplexTcp<H>
{
pub fn new(
ds_tcp_stream: DataStreamType,
us_tcp_stream_type: TCPDataType,
remote_host: String,
remote_port: String,
handlers: InnerHandlers<H>,
conn_id: u64,
) -> Result<Self, i8> {
match ds_tcp_stream {
DataStreamType::RAW(ref s) => {
let _ = s.set_read_timeout(Some(Duration::from_millis(50)));
}
DataStreamType::TLS(ref s) => {
let _ = s
.get_ref()
.set_read_timeout(Some(Duration::from_millis(50)));
}
}
impl<H: HandlerCallbacks + std::marker::Sync + std::marker::Send + Clone + 'static> FullDuplexTcp<H> {
let us_tcp_stream = match Self::connect_endpoint(
us_tcp_stream_type,
remote_host.clone(),
remote_port.clone(),
) {
Ok(s) => s,
Err(ec) => {
match ds_tcp_stream {
DataStreamType::RAW(s) => {
let _ = s.shutdown(Shutdown::Both);
}
DataStreamType::TLS(mut s) => {
let _ = s.shutdown();
}
}
return Err(ec);
}
};
pub fn new(ds_tcp_stream: DataStreamType, us_tcp_stream_type: TCPDataType, remote_host: String, remote_port: String, handlers: InnerHandlers<H>) -> Result<Self, i8> {
Ok(FullDuplexTcp {
remote_host,
remote_port,
ds_inner_m: Arc::new(Mutex::new(Some(DownStreamInner {
ds_stream: ds_tcp_stream,
internal_data_buffer: Vec::<u8>::new(),
}))),
us_inner_m: Arc::new(Mutex::new(Some(UpStreamInner {
us_stream: us_tcp_stream,
internal_data_buffer: Vec::<u8>::new(),
}))),
inner_handlers: handlers,
conn_id,
})
}
match ds_tcp_stream {
DataStreamType::RAW(ref s) => { let _ = s.set_read_timeout(Some(Duration::from_millis(50))); },
DataStreamType::TLS(ref s) => { let _ = s.get_ref().set_read_timeout(Some(Duration::from_millis(50))); },
}
pub fn handle(&mut self) {
let conn_id = self.conn_id;
let (state_sender, state_receiver): (
Sender<FullDuplexTcpState>,
Receiver<FullDuplexTcpState>,
) = mpsc::channel();
let (ds_data_pipe_sender, ds_data_pipe_receiver): (Sender<DataPipe>, Receiver<DataPipe>) =
mpsc::channel();
let (us_data_pipe_sender, us_data_pipe_receiver): (Sender<DataPipe>, Receiver<DataPipe>) =
mpsc::channel();
let us_tcp_stream = match Self::connect_endpoint(us_tcp_stream_type, remote_host.clone(), remote_port.clone()) {
Ok(s) => s,
Err(ec) => {
match ds_tcp_stream {
DataStreamType::RAW(s) => { let _ = s.shutdown(Shutdown::Both); },
DataStreamType::TLS(mut s) => { let _ = s.shutdown(); },
}
return Err(ec);
}
};
let ds_method_pointer = self.ds_inner_m.clone();
let ds_state_bc = state_sender.clone();
Ok(
FullDuplexTcp {
remote_host,
remote_port,
ds_inner_m: Arc::new(Mutex::new(Some(DownStreamInner{ds_stream: ds_tcp_stream, internal_data_buffer: Vec::<u8>::new()}))),
us_inner_m: Arc::new(Mutex::new(Some(UpStreamInner{us_stream: us_tcp_stream, internal_data_buffer: Vec::<u8>::new()}))),
inner_handlers: handlers,
})
}
let us_method_pointer = self.us_inner_m.clone();
let us_state_bc = state_sender.clone();
pub fn handle(&mut self) {
thread::spawn(move || {
ds_method_pointer
.lock()
.unwrap()
.take()
.unwrap()
.ds_handler(ds_state_bc, ds_data_pipe_receiver);
});
let (state_sender, state_receiver): (Sender<FullDuplexTcpState>, Receiver<FullDuplexTcpState>) = mpsc::channel();
let (ds_data_pipe_sender, ds_data_pipe_receiver): (Sender<DataPipe>, Receiver<DataPipe>) = mpsc::channel();
let (us_data_pipe_sender, us_data_pipe_receiver): (Sender<DataPipe>, Receiver<DataPipe>) = mpsc::channel();
thread::spawn(move || {
us_method_pointer
.lock()
.unwrap()
.take()
.unwrap()
.us_handler(us_state_bc, us_data_pipe_receiver);
});
let ds_method_pointer = self.ds_inner_m.clone();
let ds_state_bc = state_sender.clone();
loop {
match state_receiver.recv() {
Ok(state_request) => {
match state_request {
// DownStream Write Request
FullDuplexTcpState::DownStreamWrite(data) => {
/*
Callbacks that work with data from UpStream go here
Add callback return types for blocking callback subroutines
Shutdown - Shutdown TCP connection
Relay - Relay TCP stream
Spoof - Spoof back to received stream direction
Freeze - Freeze data (dont relay and destroy data)
*/
let us_method_pointer = self.us_inner_m.clone();
let us_state_bc = state_sender.clone();
let inner_handlers_clone = self.inner_handlers.clone();
let in_data = data.clone();
thread::spawn(move || {
ds_method_pointer.lock().unwrap().take().unwrap().ds_handler(ds_state_bc, ds_data_pipe_receiver);
});
thread::spawn(move || {
inner_handlers_clone.cb.us_nb_callback(in_data, conn_id);
});
thread::spawn(move || {
us_method_pointer.lock().unwrap().take().unwrap().us_handler(us_state_bc, us_data_pipe_receiver);
});
match self.inner_handlers.cb.us_b_callback(data, conn_id) {
CallbackRet::Relay(retdata) => {
match ds_data_pipe_sender.send(DataPipe::DataWrite(retdata)) {
Ok(()) => {}
Err(e) => {
Self::handle_error(
format!(
"Failed to send data write to DownStream \
thread: {}",
e
)
.as_str(),
);
return;
}
}
}
CallbackRet::Spoof(retdata) => {
match us_data_pipe_sender.send(DataPipe::DataWrite(retdata)) {
Ok(()) => {}
Err(e) => {
Self::handle_error(
format!(
"Failed to send data write to DownStream \
thread: {}",
e
)
.as_str(),
);
return;
}
}
}
CallbackRet::Freeze => {}
CallbackRet::Shutdown => {
if let Err(e) = us_data_pipe_sender.send(DataPipe::Shutdown) {
Self::handle_error(
format!(
"Failed to send Shutdown signal to UpStream \
thread: {}",
e
)
.as_str(),
);
}
if let Err(e) = ds_data_pipe_sender.send(DataPipe::Shutdown) {
Self::handle_error(
format!(
"Failed to send Shutdown signal to DownStream \
thread: {}",
e
)
.as_str(),
);
}
return;
}
}
}
// UpStream Write Request
FullDuplexTcpState::UpStreamWrite(data) => {
/*
Callbacks that work with data from DownStream go here
*/
loop {
let inner_handlers_clone = self.inner_handlers.clone();
let in_data = data.clone();
match state_receiver.recv() {
Ok(state_request) => {
match state_request {
thread::spawn(move || {
inner_handlers_clone.cb.ds_nb_callback(in_data, conn_id);
});
// DownStream Write Request
FullDuplexTcpState::DownStreamWrite(data) => {
match self.inner_handlers.cb.ds_b_callback(data, conn_id) {
CallbackRet::Relay(retdata) => {
match us_data_pipe_sender.send(DataPipe::DataWrite(retdata)) {
Ok(()) => {}
Err(e) => {
Self::handle_error(
format!(
"Failed to send data write to UpStream \
thread: {}",
e
)
.as_str(),
);
return;
}
}
}
CallbackRet::Spoof(retdata) => {
match ds_data_pipe_sender.send(DataPipe::DataWrite(retdata)) {
Ok(()) => {}
Err(e) => {
Self::handle_error(
format!(
"Failed to send data write to DownStream \
thread: {}",
e
)
.as_str(),
);
return;
}
}
}
CallbackRet::Freeze => {}
CallbackRet::Shutdown => {
if let Err(e) = ds_data_pipe_sender.send(DataPipe::Shutdown) {
Self::handle_error(
format!(
"Failed to send Shutdown signal to DownStream \
thread: {}",
e
)
.as_str(),
);
}
if let Err(e) = us_data_pipe_sender.send(DataPipe::Shutdown) {
Self::handle_error(
format!(
"Failed to send Shutdown signal to UpStream \
thread: {}",
e
)
.as_str(),
);
}
return;
}
}
}
// DownStreamShutDown Request
FullDuplexTcpState::DownStreamShutDown => {
if let Err(e) = us_data_pipe_sender.send(DataPipe::Shutdown) {
Self::handle_error(
format!(
"Failed to send Shutdown signal to UpStream thread: {}",
e
)
.as_str(),
);
return;
}
return;
}
// UpStreamShutDown Request
FullDuplexTcpState::UpStreamShutDown => {
if let Err(e) = ds_data_pipe_sender.send(DataPipe::Shutdown) {
Self::handle_error(
format!(
"Failed to send Shutdown signal to DownStream thread: {}",
e
)
.as_str(),
);
return;
}
return;
}
}
}
Err(_e) => {
Self::handle_error("State receiver communication channel has closed!");
if let Err(e) = ds_data_pipe_sender.send(DataPipe::Shutdown) {
Self::handle_error(
format!("Failed to send Shutdown signal to DownStream thread: {}", e)
.as_str(),
);
}
if let Err(e) = us_data_pipe_sender.send(DataPipe::Shutdown) {
Self::handle_error(
format!("Failed to send Shutdown signal to UpStream thread: {}", e)
.as_str(),
);
}
return;
}
} // State Receiver
}
}
/*
Callbacks that work with data from UpStream go here
Add callback return types for blocking callback subroutines
Shutdown - Shutdown TCP connection
Relay - Relay TCP stream
Spoof - Spoof back to received stream direction
Freeze - Freeze data (dont relay and destroy data)
*/
fn connect_endpoint(
stream_data_type: TCPDataType,
remote_host: String,
remote_port: String,
) -> Result<DataStreamType, i8> {
match stream_data_type {
TCPDataType::RAW => {
let s = match TcpStream::connect(format!("{}:{}", remote_host, remote_port)) {
Ok(s) => s,
Err(e) => {
Self::handle_error(
format!(
"Can't connect to remote host: {}\nErr: {}",
format!("{}:{}", remote_host, remote_port),
e
)
.as_str(),
);
return Result::Err(-1);
}
};
let _ = s.set_read_timeout(Some(Duration::from_millis(50)));
return Ok(DataStreamType::RAW(s));
}
TCPDataType::TLS => {
let mut sslbuilder = SslConnector::builder(SslMethod::tls()).unwrap();
sslbuilder.set_verify(SslVerifyMode::NONE);
let inner_handlers_clone = self.inner_handlers.clone();
let in_data = data.clone();
let connector = sslbuilder.build();
thread::spawn(move || {
inner_handlers_clone.cb.us_nb_callback(in_data);
});
let s = match TcpStream::connect(format!("{}:{}", remote_host, remote_port)) {
Ok(s) => s,
Err(e) => {
Self::handle_error(
format!(
"Can't connect to remote host: {}\nErr: {}",
format!("{}:{}", remote_host, remote_port),
e
)
.as_str(),
);
return Result::Err(-1);
}
};
match self.inner_handlers.cb.us_b_callback(data) {
CallbackRet::Relay(retdata) => {
match ds_data_pipe_sender.send(DataPipe::DataWrite(retdata)) {
Ok(()) => {},
Err(e) => {
Self::handle_error(format!("Failed to send data write to DownStream thread: {}", e).as_str());
return;
}
}
},
CallbackRet::Spoof(retdata) => {
match us_data_pipe_sender.send(DataPipe::DataWrite(retdata)) {
Ok(()) => {},
Err(e) => {
Self::handle_error(format!("Failed to send data write to DownStream thread: {}", e).as_str());
return;
}
}
},
CallbackRet::Freeze => {},
CallbackRet::Shutdown => {
if let Err(e) = us_data_pipe_sender.send(DataPipe::Shutdown) {
Self::handle_error(format!("Failed to send Shutdown signal to UpStream thread: {}", e).as_str());
}
if let Err(e) = ds_data_pipe_sender.send(DataPipe::Shutdown) {
Self::handle_error(format!("Failed to send Shutdown signal to DownStream thread: {}", e).as_str());
}
return;
}
}
},
// UpStream Write Request
FullDuplexTcpState::UpStreamWrite(data) => {
let s = match connector.connect(remote_host.as_str(), s) {
Ok(s) => s,
Err(e) => {
Self::handle_error(
format!("Failed to accept TLS/SSL handshake: {}", e).as_str(),
);
return Result::Err(-2);
}
};
/*
Callbacks that work with data from DownStream go here
*/
let _ = s
.get_ref()
.set_read_timeout(Some(Duration::from_millis(50)));
return Ok(DataStreamType::TLS(s));
}
}
}
let inner_handlers_clone = self.inner_handlers.clone();
let in_data = data.clone();
fn handle_error(error_description: &str) {
println!("[SSLRelay Master Thread Error]: {}", error_description);
}
}
thread::spawn(move || {
inner_handlers_clone.cb.ds_nb_callback(in_data);
});
match self.inner_handlers.cb.ds_b_callback(data) {
CallbackRet::Relay(retdata) => {
match us_data_pipe_sender.send(DataPipe::DataWrite(retdata)) {
Ok(()) => {},
Err(e) => {
Self::handle_error(format!("Failed to send data write to UpStream thread: {}", e).as_str());
return;
}
}
},
CallbackRet::Spoof(retdata) => {
match ds_data_pipe_sender.send(DataPipe::DataWrite(retdata)) {
Ok(()) => {},
Err(e) => {
Self::handle_error(format!("Failed to send data write to DownStream thread: {}", e).as_str());
return;
}
}
},
CallbackRet::Freeze => {},
CallbackRet::Shutdown => {
if let Err(e) = ds_data_pipe_sender.send(DataPipe::Shutdown) {
Self::handle_error(format!("Failed to send Shutdown signal to DownStream thread: {}", e).as_str());
}
if let Err(e) = us_data_pipe_sender.send(DataPipe::Shutdown) {
Self::handle_error(format!("Failed to send Shutdown signal to UpStream thread: {}", e).as_str());
}
return;
}
}
},
// DownStreamShutDown Request
FullDuplexTcpState::DownStreamShutDown => {
if let Err(e) = us_data_pipe_sender.send(DataPipe::Shutdown) {
Self::handle_error(format!("Failed to send Shutdown signal to UpStream thread: {}", e).as_str());
return;
}
return;
},
// UpStreamShutDown Request
FullDuplexTcpState::UpStreamShutDown => {
if let Err(e) = ds_data_pipe_sender.send(DataPipe::Shutdown) {
Self::handle_error(format!("Failed to send Shutdown signal to DownStream thread: {}", e).as_str());
return;
}
return;
},
}
},
Err(_e) => {
Self::handle_error("State receiver communication channel has closed!");
if let Err(e) = ds_data_pipe_sender.send(DataPipe::Shutdown) {
Self::handle_error(format!("Failed to send Shutdown signal to DownStream thread: {}", e).as_str());
}
if let Err(e) = us_data_pipe_sender.send(DataPipe::Shutdown) {
Self::handle_error(format!("Failed to send Shutdown signal to UpStream thread: {}", e).as_str());
}
return;
}
}// State Receiver
}
}
fn connect_endpoint(stream_data_type: TCPDataType, remote_host: String, remote_port: String) -> Result<DataStreamType, i8> {
match stream_data_type {
TCPDataType::RAW => {
let s = match TcpStream::connect(format!("{}:{}", remote_host, remote_port)) {
Ok(s) => s,
Err(e) => {
Self::handle_error(format!("Can't connect to remote host: {}\nErr: {}", format!("{}:{}", remote_host, remote_port), e).as_str());
return Result::Err(-1);
}
};
let _ = s.set_read_timeout(Some(Duration::from_millis(50)));
return Ok(DataStreamType::RAW(s));
},
TCPDataType::TLS => {
let mut sslbuilder = SslConnector::builder(SslMethod::tls()).unwrap();
sslbuilder.set_verify(SslVerifyMode::NONE);
let connector = sslbuilder.build();
let s = match TcpStream::connect(format!("{}:{}", remote_host, remote_port)) {
Ok(s) => s,
Err(e) => {
Self::handle_error(format!("Can't connect to remote host: {}\nErr: {}", format!("{}:{}", remote_host, remote_port), e).as_str());
return Result::Err(-1);
}
};
let s = match connector.connect(remote_host.as_str(), s) {
Ok(s) => s,
Err(e) => {
Self::handle_error(format!("Failed to accept TLS/SSL handshake: {}", e).as_str());
return Result::Err(-2);
}
};
let _ = s.get_ref().set_read_timeout(Some(Duration::from_millis(50)));
return Ok(DataStreamType::TLS(s));
}
}
}
fn handle_error(error_description: &str) {
println!("[SSLRelay Master Thread Error]: {}", error_description);
}
}