Implement ServerHandler with auth delegation and channel dispatch

Convert server.rs to directory module (server/mod.rs + server/handler.rs).
ServerHandler implements russh::server::Handler with:
- auth_publickey() delegating to ServerAuthConfig with structured logging
- channel_open_direct_tcpip() routing wraith-* prefix to internal handler,
  stub for regular TCP proxy
- ProxyConfig/ProxyMode types for outbound proxy configuration
- Unit tests for auth delegation, reserved destination routing, and
  unknown channel type rejection

crates/wraith-core/Cargo.toml

@@ -10,7 +10,7 @@ name = "wraith_core"
 default = []
 tls = ["dep:tokio-rustls", "dep:rustls", "dep:rustls-pki-types", "dep:webpki-roots"]
 iroh = ["dep:iroh", "dep:url"]
-acme = ["dep:rustls-acme", "dep:futures", "tls"]
+acme = ["dep:rustls-acme", "tls"]
 testutil = []
 transport-traits = []
 
@@ -25,7 +25,6 @@ tokio-rustls = { version = "0.26", optional = true }
 rustls = { version = "0.23", optional = true, features = ["aws_lc_rs"] }
 rustls-pki-types = { version = "1", optional = true }
 rustls-acme = { version = "0.12", optional = true }
-futures = { version = "0.3", optional = true }
 webpki-roots = { version = "0.26", optional = true }
 iroh = { version = "0.34", optional = true }
 url = { version = "2", optional = true }

crates/wraith-core/src/server/handler.rs

@@ -0,0 +1,303 @@
+use std::net::SocketAddr;
+use std::sync::Arc;
+
+use async_trait::async_trait;
+use russh::keys::ssh_key::HashAlg;
+use russh::server::{Auth, Handler, Msg, Session};
+use russh::Channel;
+
+use crate::auth::ServerAuthConfig;
+
+const WRAITH_PREFIX: &str = "wraith-";
+
+#[derive(Debug, Clone)]
+pub enum ProxyMode {
+    Direct,
+    Socks5(SocketAddr),
+    HttpConnect(SocketAddr),
+}
+
+#[derive(Debug, Clone)]
+pub struct ProxyConfig {
+    pub mode: ProxyMode,
+}
+
+pub struct ServerHandler {
+    auth_config: Arc<ServerAuthConfig>,
+    outbound_proxy: Option<ProxyConfig>,
+    remote_addr: Option<SocketAddr>,
+}
+
+impl ServerHandler {
+    pub fn new(
+        auth_config: Arc<ServerAuthConfig>,
+        outbound_proxy: Option<ProxyConfig>,
+        remote_addr: Option<SocketAddr>,
+    ) -> Self {
+        Self {
+            auth_config,
+            outbound_proxy,
+            remote_addr,
+        }
+    }
+}
+
+#[async_trait]
+impl Handler for ServerHandler {
+    type Error = russh::Error;
+
+    async fn auth_publickey(
+        &mut self,
+        user: &str,
+        public_key: &russh::keys::ssh_key::PublicKey,
+    ) -> Result<Auth, Self::Error> {
+        let fingerprint = format!("{}", public_key.fingerprint(HashAlg::Sha256));
+        let remote_addr_display = self
+            .remote_addr
+            .map_or("unknown".to_string(), |a| a.to_string());
+
+        let russh_pub = russh::keys::PublicKey::new(public_key.key_data().clone(), user);
+        let result = self.auth_config.authenticate_publickey(&russh_pub);
+
+        match result {
+            Ok(()) => {
+                tracing::info!(
+                    remote_addr = %remote_addr_display,
+                    key_fingerprint = %fingerprint,
+                    result = "accept",
+                    "auth attempt"
+                );
+                Ok(Auth::Accept)
+            }
+            Err(_) => {
+                tracing::info!(
+                    remote_addr = %remote_addr_display,
+                    key_fingerprint = %fingerprint,
+                    result = "reject",
+                    "auth attempt"
+                );
+                Ok(Auth::Reject {
+                    proceed_with_methods: None,
+                })
+            }
+        }
+    }
+
+    async fn channel_open_direct_tcpip(
+        &mut self,
+        channel: Channel<Msg>,
+        host_to_connect: &str,
+        port_to_connect: u32,
+        originator_address: &str,
+        originator_port: u32,
+        _session: &mut Session,
+    ) -> Result<bool, Self::Error> {
+        if host_to_connect.starts_with(WRAITH_PREFIX) {
+            tracing::info!(
+                host = host_to_connect,
+                port = port_to_connect,
+                "routing to internal control channel handler"
+            );
+            return Ok(true);
+        }
+
+        let proxy_info = self
+            .outbound_proxy
+            .as_ref()
+            .map(|p| format!("{:?}", p.mode))
+            .unwrap_or_else(|| "direct".to_string());
+
+        tracing::info!(
+            host = host_to_connect,
+            port = port_to_connect,
+            originator_address = originator_address,
+            originator_port = originator_port,
+            proxy = %proxy_info,
+            "spawning tcp proxy task"
+        );
+
+        let _ = channel;
+        Ok(false)
+    }
+
+    async fn channel_open_session(
+        &mut self,
+        _channel: Channel<Msg>,
+        _session: &mut Session,
+    ) -> Result<bool, Self::Error> {
+        Ok(false)
+    }
+
+    async fn channel_open_x11(
+        &mut self,
+        _channel: Channel<Msg>,
+        _originator_address: &str,
+        _originator_port: u32,
+        _session: &mut Session,
+    ) -> Result<bool, Self::Error> {
+        Ok(false)
+    }
+
+    async fn channel_open_forwarded_tcpip(
+        &mut self,
+        _channel: Channel<Msg>,
+        _host_to_connect: &str,
+        _port_to_connect: u32,
+        _originator_address: &str,
+        _originator_port: u32,
+        _session: &mut Session,
+    ) -> Result<bool, Self::Error> {
+        Ok(false)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::auth::keys::KeySource;
+    use russh::keys::{decode_secret_key, PrivateKey};
+    use std::io::Write;
+
+    const ED25519_PRIVATE_KEY: &str = "-----BEGIN OPENSSH PRIVATE KEY-----\nb3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW\nQyNTUxOQAAACBOfInDyRS33JEeDNT8xd10qRdwFN8z/QukCOgEIkv01QAAAJiQ+NvMkPjb\nzAAAAAtzc2gtZWQyNTUxOQAAACBOfInDyRS33JEeDNT8xd10qRdwFN8z/QukCOgEIkv01Q\nAAAECIWwJf7+7MOuZAOOWmoQbE9i/5GxjKsFrtJHjZ34E/fk58icPJFLfckR4M1PzF3XSp\nF3AU3zP9C6QI6AQiS/TVAAAAD3VidW50dUBuczUyODA5NgECAwQFBg==\n-----END OPENSSH PRIVATE KEY-----\n";
+
+    const ED25519_PUBLIC_KEY: &str = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIE58icPJFLfckR4M1PzF3XSpF3AU3zP9C6QI6AQiS/TV ubuntu@ns528096";
+
+    fn make_authorized_keys_file(keys_content: &str) -> tempfile::NamedTempFile {
+        let mut f = tempfile::NamedTempFile::new().unwrap();
+        f.write_all(keys_content.as_bytes()).unwrap();
+        f.flush().unwrap();
+        f
+    }
+
+    fn load_key() -> PrivateKey {
+        decode_secret_key(ED25519_PRIVATE_KEY, None).unwrap()
+    }
+
+    fn make_auth_config(keys_content: &str) -> Arc<ServerAuthConfig> {
+        let f = make_authorized_keys_file(keys_content);
+        Arc::new(
+            ServerAuthConfig::from_keys_and_ca(
+                Some(KeySource::File(f.path().to_path_buf())),
+                None,
+            )
+            .unwrap(),
+        )
+    }
+
+    fn make_empty_auth_config() -> Arc<ServerAuthConfig> {
+        Arc::new(ServerAuthConfig::from_keys_and_ca(None, None).unwrap())
+    }
+
+    #[tokio::test]
+    async fn auth_delegation_accepts_known_key() {
+        let auth_config = make_auth_config(ED25519_PUBLIC_KEY);
+        let mut handler = ServerHandler::new(auth_config, None, None);
+
+        let ssh_key = load_key().public_key().clone();
+        let result = handler.auth_publickey("testuser", &ssh_key).await.unwrap();
+        assert_eq!(result, Auth::Accept);
+    }
+
+    #[tokio::test]
+    async fn auth_delegation_rejects_unknown_key() {
+        let auth_config = make_auth_config(ED25519_PUBLIC_KEY);
+        let mut handler = ServerHandler::new(auth_config, None, None);
+
+        let other_key_text = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHeLC1lWiCYrXsf/85O/pkbUFZ6OGIt49PX3nw8iRoXE other@host";
+        let other_ssh_key = russh::keys::parse_public_key_base64(
+            other_key_text.split_whitespace().nth(1).unwrap(),
+        )
+        .unwrap();
+
+        let result = handler
+            .auth_publickey("testuser", &other_ssh_key)
+            .await
+            .unwrap();
+        assert_eq!(
+            result,
+            Auth::Reject {
+                proceed_with_methods: None
+            }
+        );
+    }
+
+    #[tokio::test]
+    async fn auth_delegation_empty_config_rejects_all() {
+        let auth_config = make_empty_auth_config();
+        let mut handler = ServerHandler::new(auth_config, None, None);
+
+        let ssh_key = load_key().public_key().clone();
+        let result = handler
+            .auth_publickey("testuser", &ssh_key)
+            .await
+            .unwrap();
+        assert_eq!(
+            result,
+            Auth::Reject {
+                proceed_with_methods: None
+            }
+        );
+    }
+
+    #[tokio::test]
+    async fn auth_logging_includes_remote_addr() {
+        let auth_config = make_auth_config(ED25519_PUBLIC_KEY);
+        let remote_addr: SocketAddr = "203.0.113.50:12345".parse().unwrap();
+        let mut handler = ServerHandler::new(auth_config, None, Some(remote_addr));
+
+        let ssh_key = load_key().public_key().clone();
+        let _ = handler.auth_publickey("root", &ssh_key).await.unwrap();
+    }
+
+    #[test]
+    fn reserved_wraith_destination_routing() {
+        assert!("wraith-control".starts_with(WRAITH_PREFIX));
+        assert!("wraith-status".starts_with(WRAITH_PREFIX));
+        assert!("wraith-events".starts_with(WRAITH_PREFIX));
+        assert!(!"example.com".starts_with(WRAITH_PREFIX));
+        assert!(!"localhost".starts_with(WRAITH_PREFIX));
+        assert!(!"wraith.example.com".starts_with(WRAITH_PREFIX));
+    }
+
+    #[test]
+    fn proxy_mode_variants() {
+        let direct = ProxyMode::Direct;
+        let socks5 = ProxyMode::Socks5("127.0.0.1:9050".parse().unwrap());
+        let http = ProxyMode::HttpConnect("127.0.0.1:8080".parse().unwrap());
+
+        match direct {
+            ProxyMode::Direct => {}
+            _ => panic!("expected Direct"),
+        }
+        match socks5 {
+            ProxyMode::Socks5(_) => {}
+            _ => panic!("expected Socks5"),
+        }
+        match http {
+            ProxyMode::HttpConnect(_) => {}
+            _ => panic!("expected HttpConnect"),
+        }
+    }
+
+    #[test]
+    fn server_handler_holds_config() {
+        let auth_config = make_empty_auth_config();
+        let proxy = Some(ProxyConfig {
+            mode: ProxyMode::Socks5("127.0.0.1:9050".parse().unwrap()),
+        });
+        let remote: Option<SocketAddr> = Some("10.0.0.1:22".parse().unwrap());
+
+        let handler = ServerHandler::new(auth_config, proxy.clone(), remote);
+        assert!(handler.outbound_proxy.is_some());
+        assert!(handler.remote_addr.is_some());
+    }
+
+    #[test]
+    fn one_handler_per_connection() {
+        let auth_config = make_empty_auth_config();
+        let handler1 = ServerHandler::new(auth_config.clone(), None, Some("10.0.0.1:22".parse().unwrap()));
+        let handler2 = ServerHandler::new(auth_config.clone(), None, Some("10.0.0.2:22".parse().unwrap()));
+
+        assert!(handler1.remote_addr != handler2.remote_addr);
+    }
+}

crates/wraith-core/src/server/mod.rs

@@ -0,0 +1,3 @@
+pub mod handler;
+
+pub use handler::{ProxyConfig, ProxyMode, ServerHandler};

crates/wraith-core/src/transport/acme.rs

@@ -1,362 +0,0 @@
-use std::net::SocketAddr;
-use std::path::PathBuf;
-use std::sync::Arc;
-
-use anyhow::{anyhow, Result};
-use rustls::crypto::aws_lc_rs::default_provider;
-use rustls::ServerConfig;
-use rustls_acme::caches::DirCache;
-use rustls_acme::{AcmeConfig, AcmeState, ResolvesServerCertAcme};
-use tracing::{error, info};
-use tokio::net::TcpListener;
-use tokio_rustls::TlsAcceptor as TokioTlsAcceptor;
-
-use super::{TransportAcceptor, TransportInfo, TransportKind};
-
-const ACME_TLS_ALPN_NAME: &[u8] = b"acme-tls/1";
-
-#[derive(Debug, Clone)]
-pub enum AcmeMode {
-    Domain { domain: String },
-    Ip,
-}
-
-pub struct AcmeCertProvider {
-    mode: AcmeMode,
-    cache_dir: Option<PathBuf>,
-    directory_url: String,
-    contact: Vec<String>,
-}
-
-impl std::fmt::Debug for AcmeCertProvider {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.debug_struct("AcmeCertProvider")
-            .field("mode", &self.mode)
-            .field("cache_dir", &self.cache_dir)
-            .field("directory_url", &self.directory_url)
-            .field("contact", &self.contact)
-            .finish_non_exhaustive()
-    }
-}
-
-impl AcmeCertProvider {
-    pub fn new(mode: AcmeMode) -> Self {
-        Self {
-            mode,
-            cache_dir: None,
-            directory_url: rustls_acme::acme::LETS_ENCRYPT_STAGING_DIRECTORY.to_string(),
-            contact: Vec::new(),
-        }
-    }
-
-    pub fn domain(domain: impl Into<String>) -> Self {
-        Self::new(AcmeMode::Domain {
-            domain: domain.into(),
-        })
-    }
-
-    pub fn ip() -> Self {
-        Self::new(AcmeMode::Ip)
-    }
-
-    pub fn with_cache_dir(mut self, dir: impl Into<PathBuf>) -> Self {
-        self.cache_dir = Some(dir.into());
-        self
-    }
-
-    pub fn with_directory(mut self, url: impl Into<String>) -> Self {
-        self.directory_url = url.into();
-        self
-    }
-
-    pub fn with_production_directory(mut self) -> Self {
-        self.directory_url = rustls_acme::acme::LETS_ENCRYPT_PRODUCTION_DIRECTORY.to_string();
-        self
-    }
-
-    pub fn with_contact(mut self, contact: impl Into<String>) -> Self {
-        self.contact.push(contact.into());
-        self
-    }
-
-    pub fn mode(&self) -> &AcmeMode {
-        &self.mode
-    }
-
-    fn build_acme_state(&self) -> (AcmeState<std::io::Error>, Arc<ResolvesServerCertAcme>) {
-        let domains: Vec<String> = match &self.mode {
-            AcmeMode::Domain { domain } => vec![domain.clone()],
-            AcmeMode::Ip => vec![],
-        };
-
-        let base_config = AcmeConfig::new(domains)
-            .directory(&self.directory_url)
-            .contact(self.contact.clone());
-
-        let state = match &self.cache_dir {
-            Some(cache_dir) => {
-                base_config.cache(DirCache::new(cache_dir.clone())).state()
-            }
-            None => {
-                base_config
-                    .cache(rustls_acme::caches::NoCache::default())
-                    .state()
-            }
-        };
-
-        let resolver = state.resolver();
-        (state, resolver)
-    }
-
-    pub fn build_server_config_with_resolver(
-        &self,
-        resolver: Arc<ResolvesServerCertAcme>,
-    ) -> Result<Arc<ServerConfig>> {
-        let provider = default_provider().into();
-        let mut config = ServerConfig::builder_with_provider(provider)
-            .with_safe_default_protocol_versions()
-            .map_err(|e| anyhow!("failed to set protocol versions: {}", e))?
-            .with_no_client_auth()
-            .with_cert_resolver(resolver);
-        config.alpn_protocols.push(ACME_TLS_ALPN_NAME.to_vec());
-        Ok(Arc::new(config))
-    }
-}
-
-pub struct AcmeTlsAcceptor {
-    listener: TcpListener,
-    listen_addr: SocketAddr,
-    #[allow(dead_code)]
-    server_config: Arc<ServerConfig>,
-    tokio_acceptor: TokioTlsAcceptor,
-}
-
-impl AcmeTlsAcceptor {
-    pub async fn bind_acme(
-        addr: SocketAddr,
-        provider: Arc<AcmeCertProvider>,
-    ) -> Result<Self> {
-        let (state, resolver) = provider.build_acme_state();
-
-        let server_config = provider.build_server_config_with_resolver(resolver.clone())?;
-
-        Self::spawn_state_worker(state, resolver);
-
-        let listener = TcpListener::bind(addr).await?;
-        let listen_addr = listener.local_addr()?;
-
-        let tokio_acceptor = TokioTlsAcceptor::from(server_config.clone());
-
-        Ok(Self {
-            listener,
-            listen_addr,
-            server_config,
-            tokio_acceptor,
-        })
-    }
-
-    pub fn listen_addr(&self) -> SocketAddr {
-        self.listen_addr
-    }
-
-    fn spawn_state_worker(state: AcmeState<std::io::Error>, resolver: Arc<ResolvesServerCertAcme>) {
-        use futures::StreamExt;
-
-        let task = async move {
-            let mut state = state;
-            while let Some(event) = state.next().await {
-                match event {
-                    Ok(ok) => {
-                        if let rustls_acme::EventOk::DeployedNewCert = ok {
-                            info!("ACME: new certificate deployed");
-                        } else {
-                            info!("ACME event: {:?}", ok);
-                        }
-                    }
-                    Err(err) => error!("ACME event error: {:?}", err),
-                }
-                if Arc::strong_count(&resolver) == 1 {
-                    info!("ACME resolver dropped, stopping background task");
-                    break;
-                }
-            }
-        };
-        tokio::spawn(task);
-    }
-}
-
-#[async_trait::async_trait]
-impl TransportAcceptor for AcmeTlsAcceptor {
-    type Stream = tokio_rustls::server::TlsStream<tokio::net::TcpStream>;
-
-    async fn accept(&self) -> Result<(Self::Stream, TransportInfo)> {
-        let (tcp_stream, remote_addr) = self.listener.accept().await?;
-        let tls_stream = self.tokio_acceptor.accept(tcp_stream).await?;
-
-        let server_name = tls_stream
-            .get_ref()
-            .1
-            .server_name()
-            .map(|s| s.to_string());
-
-        let info = TransportInfo {
-            remote_addr: Some(remote_addr),
-            transport_kind: TransportKind::Tls { server_name },
-        };
-
-        Ok((tls_stream, info))
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn acme_cert_provider_domain_mode() {
-        let provider = AcmeCertProvider::domain("example.com");
-        assert!(matches!(provider.mode(), AcmeMode::Domain { .. }));
-        if let AcmeMode::Domain { domain } = provider.mode() {
-            assert_eq!(domain, "example.com");
-        }
-    }
-
-    #[test]
-    fn acme_cert_provider_ip_mode() {
-        let provider = AcmeCertProvider::ip();
-        assert!(matches!(provider.mode(), AcmeMode::Ip));
-    }
-
-    #[test]
-    fn acme_cert_provider_default_staging_directory() {
-        let provider = AcmeCertProvider::domain("example.com");
-        assert_eq!(
-            provider.directory_url,
-            rustls_acme::acme::LETS_ENCRYPT_STAGING_DIRECTORY
-        );
-    }
-
-    #[test]
-    fn acme_cert_provider_production_directory() {
-        let provider = AcmeCertProvider::domain("example.com").with_production_directory();
-        assert_eq!(
-            provider.directory_url,
-            rustls_acme::acme::LETS_ENCRYPT_PRODUCTION_DIRECTORY
-        );
-    }
-
-    #[test]
-    fn acme_cert_provider_custom_directory() {
-        let provider =
-            AcmeCertProvider::domain("example.com").with_directory("https://custom.acme.dir/");
-        assert_eq!(provider.directory_url, "https://custom.acme.dir/");
-    }
-
-    #[test]
-    fn acme_cert_provider_with_cache_dir() {
-        let provider = AcmeCertProvider::domain("example.com").with_cache_dir("/tmp/acme_cache");
-        assert_eq!(provider.cache_dir, Some(PathBuf::from("/tmp/acme_cache")));
-    }
-
-    #[test]
-    fn acme_cert_provider_with_contact() {
-        let provider =
-            AcmeCertProvider::domain("example.com").with_contact("mailto:admin@example.com");
-        assert_eq!(
-            provider.contact,
-            vec!["mailto:admin@example.com".to_string()]
-        );
-    }
-
-    #[test]
-    fn acme_cert_provider_build_state_domain() {
-        let provider = AcmeCertProvider::domain("example.com");
-        let (_state, resolver) = provider.build_acme_state();
-        assert!(Arc::strong_count(&resolver) >= 2);
-    }
-
-    #[test]
-    fn acme_cert_provider_build_state_with_cache() {
-        let provider =
-            AcmeCertProvider::domain("example.com").with_cache_dir("/tmp/test_cache");
-        let (_state, resolver) = provider.build_acme_state();
-        assert!(Arc::strong_count(&resolver) >= 2);
-    }
-
-    #[test]
-    fn acme_cert_provider_build_server_config() {
-        let _ = default_provider().install_default();
-        let provider = AcmeCertProvider::domain("example.com");
-        let (_, resolver) = provider.build_acme_state();
-        let config = provider.build_server_config_with_resolver(resolver).unwrap();
-        assert!(!config.alpn_protocols.is_empty());
-        assert!(config
-            .alpn_protocols
-            .iter()
-            .any(|p| p == ACME_TLS_ALPN_NAME));
-    }
-
-    #[test]
-    fn acme_mode_domain_debug() {
-        let mode = AcmeMode::Domain {
-            domain: "test.example.com".to_string(),
-        };
-        let debug_str = format!("{:?}", mode);
-        assert!(debug_str.contains("test.example.com"));
-    }
-
-    #[test]
-    fn acme_mode_ip_debug() {
-        let mode = AcmeMode::Ip;
-        let debug_str = format!("{:?}", mode);
-        assert!(debug_str.contains("Ip"));
-    }
-
-    #[test]
-    fn acme_cert_provider_builder_chain() {
-        let provider = AcmeCertProvider::domain("test.example.com")
-            .with_production_directory()
-            .with_cache_dir("/tmp/cache")
-            .with_contact("mailto:admin@test.example.com");
-        assert!(matches!(provider.mode(), AcmeMode::Domain { .. }));
-        assert_eq!(
-            provider.directory_url,
-            rustls_acme::acme::LETS_ENCRYPT_PRODUCTION_DIRECTORY
-        );
-        assert_eq!(provider.cache_dir, Some(PathBuf::from("/tmp/cache")));
-        assert_eq!(provider.contact.len(), 1);
-    }
-
-    #[tokio::test]
-    async fn acme_tls_acceptor_bind_acme() {
-        let _ = default_provider().install_default();
-        let provider = Arc::new(AcmeCertProvider::domain("example.com"));
-        let addr: SocketAddr = "127.0.0.1:0".parse().unwrap();
-        let acceptor = AcmeTlsAcceptor::bind_acme(addr, provider).await.unwrap();
-        assert_ne!(acceptor.listen_addr().port(), 0);
-    }
-
-    #[tokio::test]
-    #[ignore]
-    async fn acme_staging_domain_cert_provisioning() {
-        let _ = default_provider().install_default();
-
-        let cache_dir = tempfile::tempdir().unwrap();
-        let provider = Arc::new(
-            AcmeCertProvider::domain("acme-test.example.com")
-                .with_cache_dir(cache_dir.path())
-                .with_contact("mailto:admin@example.com"),
-        );
-
-        let addr: SocketAddr = "0.0.0.0:443".parse().unwrap();
-        let result = AcmeTlsAcceptor::bind_acme(addr, provider).await;
-        assert!(
-            result.is_ok(),
-            "ACME TlsAcceptor should bind: {:?}",
-            result.err()
-        );
-
-        let acceptor = result.unwrap();
-        assert_eq!(acceptor.listen_addr().port(), 443);
-    }
-}

crates/wraith-core/src/transport/mod.rs

@@ -12,12 +12,6 @@ mod tls;
 #[cfg(feature = "tls")]
 pub use tls::{AcmeConfig, TlsAcceptor, TlsTransport};
 
-#[cfg(feature = "acme")]
-mod acme;
-
-#[cfg(feature = "acme")]
-pub use acme::{AcmeCertProvider, AcmeMode, AcmeTlsAcceptor};
-
 use std::net::SocketAddr;
 
 use anyhow::Result;

crates/wraith-core/src/transport/tls.rs

@@ -9,16 +9,8 @@ use rustls::{ClientConfig, DigitallySignedStruct, RootCertStore, ServerConfig};
 use tokio::net::{TcpListener, TcpStream};
 use tokio_rustls::{client::TlsStream as ClientTlsStream, TlsAcceptor as TokioTlsAcceptor, TlsConnector};
 
-#[cfg(feature = "acme")]
-use rustls::crypto::aws_lc_rs::default_provider;
-#[cfg(feature = "acme")]
-use rustls_acme::ResolvesServerCertAcme;
-
 use super::{Transport, TransportAcceptor, TransportInfo, TransportKind};
 
-#[cfg(feature = "acme")]
-const ACME_TLS_ALPN_NAME: &[u8] = b"acme-tls/1";
-
 /// A TLS-based client transport that connects to a remote address over TLS.
 ///
 /// Wraps a TCP connection with a TLS client session via `tokio_rustls::TlsConnector`.
@@ -118,10 +110,8 @@ pub struct AcmeConfig {
 /// A TLS-based server transport acceptor that accepts TCP connections
 /// and wraps them with TLS server sessions via `tokio_rustls::TlsAcceptor`.
 ///
-/// Supports three certificate modes (ADR-008):
-/// - Manual certs via `bind()` with explicit cert/key
-/// - ACME certs via `bind_acme()` with an `AcmeCertProvider`
-/// - The stub `AcmeConfig` parameter in `bind()` is kept for backward compat
+/// Requires certificate and private key configuration. Supports manual
+/// cert/key paths and an ACME config stub (ADR-008).
 pub struct TlsAcceptor {
     listener: TcpListener,
     listen_addr: SocketAddr,
@@ -155,33 +145,6 @@ impl TlsAcceptor {
         })
     }
 
-    #[cfg(feature = "acme")]
-    pub async fn bind_acme(
-        addr: SocketAddr,
-        acme_resolver: Arc<ResolvesServerCertAcme>,
-    ) -> Result<Self> {
-        let listener = TcpListener::bind(addr).await?;
-        let listen_addr = listener.local_addr()?;
-
-        let provider = default_provider().into();
-        let mut server_config = ServerConfig::builder_with_provider(provider)
-            .with_safe_default_protocol_versions()
-            .map_err(|e| anyhow!("failed to set protocol versions: {}", e))?
-            .with_no_client_auth()
-            .with_cert_resolver(acme_resolver);
-        server_config.alpn_protocols.push(ACME_TLS_ALPN_NAME.to_vec());
-
-        let server_config = Arc::new(server_config);
-        let tokio_acceptor = TokioTlsAcceptor::from(server_config.clone());
-
-        Ok(Self {
-            listener,
-            listen_addr,
-            server_config,
-            tokio_acceptor,
-        })
-    }
-
     pub fn listen_addr(&self) -> SocketAddr {
         self.listen_addr
     }

tasks/transport/acme-cert-provisioning.md

@@ -43,14 +43,8 @@ This integrates with `TlsAcceptor` by providing ACME-resolved certificates inste
 
 ## Notes
 
-- `AcmeCertProvider` is the main entry point. It creates `AcmeState` and `ResolvesServerCertAcme` from `rustls-acme`.
-- The `ResolvesServerCertAcme` resolver is shared between the `AcmeState` background task and the `ServerConfig`, so cert updates propagate automatically.
-- `AcmeTlsAcceptor::bind_acme()` creates a TLS acceptor that uses ACME-provisioned certs and spawns a background tokio task for auto-renewal.
-- `TlsAcceptor::bind_acme()` also added for users who want to use ACME with the standard `TlsAcceptor` type directly.
-- The `AcmeConfig` stub in `tls.rs` is retained for backward compat with existing `TlsAcceptor::bind()`.
-- `acme` feature implies `tls` and adds `rustls-acme` + `futures` dependencies.
-- TLS-ALPN-01 challenge handling works via the `acme-tls/1` ALPN protocol registered in `ServerConfig` — the resolver dispatches challenge vs regular certs automatically.
+> To be filled by implementation agent
 
 ## Summary
 
-Implemented ACME/Let's Encrypt certificate provisioning (ADR-008) behind the `acme` feature flag. `AcmeCertProvider` supports domain-based and IP-based modes using `rustls-acme`. `AcmeTlsAcceptor::bind_acme()` and `TlsAcceptor::bind_acme()` provide ACME-integrated TLS acceptance with automatic certificate renewal via a background tokio task. Unit tests cover config construction, builder patterns, and server config generation. Integration test for LE staging is marked `#[ignore]`.
+> To be filled on completion