misc improvements

bin/cluelessh-faked/src/readline.rs

@@ -43,7 +43,7 @@ impl InteractiveShell {
                 127 => {
                     // Backspace, space, backspace.
                     // We literally erase it.
-                    if self.line_buf.len() > 0 {
+                    if !self.line_buf.is_empty() {
                         self.write(&[8, 32, 8]);
                         self.line_buf.truncate(self.line_buf.len() - 1);
                     }

bin/cluelesshd/src/auth.rs

@@ -39,11 +39,11 @@ impl UserPublicKey {
 
         let file = tokio::fs::read_to_string(sshd_dir)
             .await
-            .map_err(|err| AuthError::NoAuthorizedKeys(err))?;
+            .map_err(AuthError::NoAuthorizedKeys)?;
 
         let authorized_keys = AuthorizedKeys::parse(&file)?;
 
-        if let Some(key) = authorized_keys.contains(&provided_key) {
+        if let Some(key) = authorized_keys.contains(provided_key) {
             Ok(Self(key.clone()))
         } else {
             Err(AuthError::UnauthorizedPublicKey)

bin/cluelesshd/src/main.rs

@@ -192,7 +192,7 @@ async fn handle_connection(
                     }
                 },
             },
-            result = futures::future::try_join_all(&mut channel_tasks), if channel_tasks.len() > 0 => {
+            result = futures::future::try_join_all(&mut channel_tasks), if !channel_tasks.is_empty() => {
                 match result {
                     Ok(_) => channel_tasks.clear(),
                     Err(err) => return Err((err as eyre::Report).wrap_err("channel task failed")),
@@ -259,20 +259,17 @@ async fn handle_session_channel(user: String, channel: Channel) -> Result<()> {
                 }
             }
             exit = state.process_exit_recv.recv() => {
-                match exit {
-                    Some(exit) => {
-                        let exit = exit?;
-                        state.channel.send(ChannelOperationKind::Eof).await?;
-                        // TODO: also handle exit-signal
-                        state.channel
-                            .send(ChannelOperationKind::Request(ChannelRequest::ExitStatus {
-                                status: exit.code().unwrap_or(0) as u32,
-                            }))
-                        .await?;
-                        state.channel.send(ChannelOperationKind::Close).await?;
-                        return Ok(());
-                    }
-                    None => {}
+                if let Some(exit) = exit {
+                    let exit = exit?;
+                    state.channel.send(ChannelOperationKind::Eof).await?;
+                    // TODO: also handle exit-signal
+                    state.channel
+                        .send(ChannelOperationKind::Request(ChannelRequest::ExitStatus {
+                            status: exit.code().unwrap_or(0) as u32,
+                        }))
+                    .await?;
+                    state.channel.send(ChannelOperationKind::Close).await?;
+                    return Ok(());
                 }
             }
             read = read => {
@@ -346,12 +343,11 @@ impl SessionState {
                 };
             }
             ChannelUpdateKind::OpenFailed { .. } => todo!(),
-            ChannelUpdateKind::Data { data } => match &mut self.writer {
-                Some(pty) => {
-                    pty.write_all(&data).await?;
+            ChannelUpdateKind::Data { data } => {
+                if let Some(writer) = &mut self.writer {
+                    writer.write_all(&data).await?;
                 }
-                None => {}
-            },
+            }
             ChannelUpdateKind::Open(_)
             | ChannelUpdateKind::Closed
             | ChannelUpdateKind::ExtendedData { .. }

lib/cluelessh-keys/src/private.rs

@@ -33,6 +33,7 @@ impl Debug for PlaintextPrivateKey {
 }
 
 #[derive(Clone)]
+#[allow(clippy::large_enum_variant)]
 pub enum PrivateKey {
     Ed25519 {
         public_key: ed25519_dalek::VerifyingKey,

lib/cluelessh-tokio/src/server.rs

@@ -24,8 +24,7 @@ use crate::{Channel, ChannelState, PendingChannel};
 pub struct ServerListener {
     listener: TcpListener,
     auth_verify: ServerAuthVerify,
-    transport_config: cluelessh_transport::server::ServerConfig
-    // TODO ratelimits etc
+    transport_config: cluelessh_transport::server::ServerConfig, // TODO ratelimits etc
 }
 
 pub struct ServerConnection<S> {
@@ -80,7 +79,11 @@ impl From<eyre::Report> for Error {
 }
 
 impl ServerListener {
-    pub fn new(listener: TcpListener, auth_verify: ServerAuthVerify,  transport_config: cluelessh_transport::server::ServerConfig) -> Self {
+    pub fn new(
+        listener: TcpListener,
+        auth_verify: ServerAuthVerify,
+        transport_config: cluelessh_transport::server::ServerConfig,
+    ) -> Self {
         Self {
             listener,
             auth_verify,
@@ -101,7 +104,12 @@ impl ServerListener {
 }
 
 impl<S: AsyncRead + AsyncWrite> ServerConnection<S> {
-    pub fn new(stream: S, peer_addr: SocketAddr, auth_verify: ServerAuthVerify, transport_config: cluelessh_transport::server::ServerConfig) -> Self {
+    pub fn new(
+        stream: S,
+        peer_addr: SocketAddr,
+        auth_verify: ServerAuthVerify,
+        transport_config: cluelessh_transport::server::ServerConfig,
+    ) -> Self {
         let (operations_send, operations_recv) = tokio::sync::mpsc::channel(15);
         let (channel_ops_send, channel_ops_recv) = tokio::sync::mpsc::channel(15);
 

lib/cluelessh-transport/src/crypto.rs

@@ -110,7 +110,7 @@ impl AlgorithmName for EncryptionAlgorithm {
 pub struct EncodedSshSignature(pub Vec<u8>);
 
 pub struct HostKeySigningAlgorithm {
-    private_key: PrivateKey,
+    private_key: Box<PrivateKey>,
 }
 
 impl AlgorithmName for HostKeySigningAlgorithm {
@@ -121,7 +121,9 @@ impl AlgorithmName for HostKeySigningAlgorithm {
 
 impl HostKeySigningAlgorithm {
     pub fn new(private_key: PrivateKey) -> Self {
-        Self { private_key }
+        Self {
+            private_key: Box::new(private_key),
+        }
     }
     pub fn sign(&self, data: &[u8]) -> Signature {
         self.private_key.sign(data)

lib/cluelessh-transport/src/server.rs

@@ -145,8 +145,9 @@ impl ServerConnection {
                     let kex_algorithm = sup_algs.key_exchange.find(kex.kex_algorithms.0)?;
                     debug!(name = %kex_algorithm.name(), "Using KEX algorithm");
 
-                    let server_host_key_algorithm =
-                        sup_algs.hostkey_sign.find(kex.server_host_key_algorithms.0)?;
+                    let server_host_key_algorithm = sup_algs
+                        .hostkey_sign
+                        .find(kex.server_host_key_algorithms.0)?;
                     debug!(name = %server_host_key_algorithm.name(), "Using host key algorithm");
 
                     // TODO: Implement aes128-ctr