Rustls v0.21 support (#480)

.cargo/config.toml

@@ -15,9 +15,11 @@ ci-check-linux = "hack --workspace --feature-powerset check --tests --examples"
 
 # tests avoiding io-uring feature
 ci-test = "hack --feature-powerset --exclude-features=io-uring test --lib --tests --no-fail-fast -- --nocapture"
+ci-test-rustls-020 = "hack --feature-powerset --exclude-features=io-uring,rustls-0_21 test --lib --tests --no-fail-fast -- --nocapture"
+ci-test-rustls-021 = "hack --feature-powerset --exclude-features=io-uring,rustls-0_20 test --lib --tests --no-fail-fast -- --nocapture"
 
 # tests avoiding io-uring feature on Windows
-ci-test-win = "hack --feature-powerset --depth 2 --exclude-features=io-uring test --lib --tests --no-fail-fast -- --nocapture"
+ci-test-win = "hack --feature-powerset --depth=2 --exclude-features=io-uring test --lib --tests --no-fail-fast -- --nocapture"
 
 # test with io-uring feature
-ci-test-linux = "hack --feature-powerset test --lib --tests --no-fail-fast -- --nocapture"
+ci-test-linux = "hack --feature-powerset --exclude-features=rustls-0_20 test --lib --tests --no-fail-fast -- --nocapture"

.github/workflows/ci-post-merge.yml

@@ -16,6 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
+        # prettier-ignore
         target:
           - { name: Linux, os: ubuntu-latest, triple: x86_64-unknown-linux-gnu }
           - { name: macOS, os: macos-latest, triple: x86_64-apple-darwin }
@@ -37,6 +38,10 @@ jobs:
 
       - uses: actions/checkout@v3
 
+      - name: Free Disk Space
+        if: matrix.target.os == 'ubuntu-latest'
+        run: ./scripts/free-disk-space.sh
+
       - name: Install OpenSSL
         if: matrix.target.os == 'windows-latest'
         run: choco install openssl -y --forcex64 --no-progress
@@ -83,8 +88,15 @@ jobs:
         run: cargo ci-test
       - name: tests
         if: matrix.target.os == 'ubuntu-latest'
-        run: |
+        run: >-
-          sudo bash -c "ulimit -Sl 512 && ulimit -Hl 512 && PATH=$PATH:/usr/share/rust/.cargo/bin && RUSTUP_TOOLCHAIN=${{ matrix.version }} cargo ci-test && RUSTUP_TOOLCHAIN=${{ matrix.version }} cargo ci-test-linux"
+          sudo bash -c "
+          ulimit -Sl 512
+          && ulimit -Hl 512
+          && PATH=$PATH:/usr/share/rust/.cargo/bin
+          && RUSTUP_TOOLCHAIN=${{ matrix.version }} cargo ci-test-rustls-020
+          && RUSTUP_TOOLCHAIN=${{ matrix.version }} cargo ci-test-rustls-021
+          && RUSTUP_TOOLCHAIN=${{ matrix.version }} cargo ci-test-linux
+          "
 
       - name: Clear the cargo caches
         run: |

.github/workflows/ci.yml

@@ -1,6 +1,6 @@
 name: CI
 
-on: 
+on:
   pull_request: {}
   push: { branches: [master] }
 
@@ -16,6 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
+        # prettier-ignore
         target:
           - { name: Linux, os: ubuntu-latest, triple: x86_64-unknown-linux-gnu }
           - { name: macOS, os: macos-latest, triple: x86_64-apple-darwin }
@@ -37,7 +38,7 @@ jobs:
         run: sudo ifconfig lo0 alias 127.0.0.3
 
       - uses: actions/checkout@v3
-      
+
       - name: Free Disk Space
         if: matrix.target.os == 'ubuntu-latest'
         run: ./scripts/free-disk-space.sh
@@ -99,8 +100,15 @@ jobs:
         run: cargo ci-test-win
       - name: tests
         if: matrix.target.os == 'ubuntu-latest'
-        run: |
+        run: >-
-          sudo bash -c "ulimit -Sl 512 && ulimit -Hl 512 && PATH=$PATH:/usr/share/rust/.cargo/bin && RUSTUP_TOOLCHAIN=${{ matrix.version }} cargo ci-test && RUSTUP_TOOLCHAIN=${{ matrix.version }} cargo ci-test-linux"
+          sudo bash -c "
+          ulimit -Sl 512
+          && ulimit -Hl 512
+          && PATH=$PATH:/usr/share/rust/.cargo/bin
+          && RUSTUP_TOOLCHAIN=${{ matrix.version }} cargo ci-test-rustls-020
+          && RUSTUP_TOOLCHAIN=${{ matrix.version }} cargo ci-test-rustls-021
+          && RUSTUP_TOOLCHAIN=${{ matrix.version }} cargo ci-test-linux
+          "
 
       - name: Clear the cargo caches
         run: |

Cargo.toml

@@ -15,6 +15,7 @@ members = [
 resolver = "2"
 
 [workspace.package]
+license = "MIT OR Apache-2.0"
 edition = "2021"
 rust-version = "1.65"
 

actix-server/src/worker.rs

@@ -625,6 +625,7 @@ impl Future for ServerWorker {
                     self.poll(cx)
                 }
             },
+
             WorkerState::Restarting(ref mut restart) => {
                 let factory_id = restart.factory_id;
                 let token = restart.token;
@@ -649,6 +650,7 @@ impl Future for ServerWorker {
 
                 self.poll(cx)
             }
+
             WorkerState::Shutdown(ref mut shutdown) => {
                 // drop all pending connections in rx channel.
                 while let Poll::Ready(Some(conn)) = this.conn_rx.poll_recv(cx) {
@@ -682,6 +684,7 @@ impl Future for ServerWorker {
                     shutdown.timer.as_mut().poll(cx)
                 }
             }
+
             // actively poll stream and handle worker command
             WorkerState::Available => loop {
                 match this.check_readiness(cx) {

actix-tls/CHANGES.md

@@ -1,40 +1,43 @@
 # Changes
 
-## Unreleased - 2023-xx-xx
+## Unreleased
 
+- Support Rustls v0.21.
+- Added `{accept, connect}::rustls_0_21` modules.
+- Added `{accept, connect}::rustls_0_20` alias for `{accept, connect}::rustls` modules.
 - Minimum supported Rust version (MSRV) is now 1.65.
 
-## 3.0.4 - 2022-03-15
+## 3.0.4
 
 - Logs emitted now use the `tracing` crate with `log` compatibility. [#451]
 
 [#451]: https://github.com/actix/actix-net/pull/451
 
-## 3.0.3 - 2022-02-15
+## 3.0.3
 
 - No significant changes since `3.0.2`.
 
-## 3.0.2 - 2022-01-28
+## 3.0.2
 
 - Expose `connect::Connection::new`. [#439]
 
 [#439]: https://github.com/actix/actix-net/pull/439
 
-## 3.0.1 - 2022-01-11
+## 3.0.1
 
 - No significant changes since `3.0.0`.
 
-## 3.0.0 - 2021-12-26
+## 3.0.0
 
 - No significant changes since `3.0.0-rc.2`.
 
-## 3.0.0-rc.2 - 2021-12-10
+## 3.0.0-rc.2
 
 - Re-export `openssl::SslConnectorBuilder` in `connect::openssl::reexports`. [#429]
 
 [#429]: https://github.com/actix/actix-net/pull/429
 
-## 3.0.0-rc.1 - 2021-11-29
+## 3.0.0-rc.1
 
 ### Added
 
@@ -72,7 +75,7 @@
 [#422]: https://github.com/actix/actix-net/pull/422
 [#423]: https://github.com/actix/actix-net/pull/423
 
-## 3.0.0-beta.9 - 2021-11-22
+## 3.0.0-beta.9
 
 - Add configurable timeout for accepting TLS connection. [#393]
 - Added `TlsError::Timeout` variant. [#393]
@@ -82,20 +85,20 @@
 [#393]: https://github.com/actix/actix-net/pull/393
 [#420]: https://github.com/actix/actix-net/pull/420
 
-## 3.0.0-beta.8 - 2021-11-15
+## 3.0.0-beta.8
 
 - Add `Connect::request` for getting a reference to the connection request. [#415]
 
 [#415]: https://github.com/actix/actix-net/pull/415
 
-## 3.0.0-beta.7 - 2021-10-20
+## 3.0.0-beta.7
 
 - Add `webpki_roots_cert_store()` to get rustls compatible webpki roots cert store. [#401]
 - Alias `connect::ssl` to `connect::tls`. [#401]
 
 [#401]: https://github.com/actix/actix-net/pull/401
 
-## 3.0.0-beta.6 - 2021-10-19
+## 3.0.0-beta.6
 
 - Update `tokio-rustls` to `0.23` which uses `rustls` `0.20`. [#396]
 - Removed a re-export of `Session` from `rustls` as it no longer exist. [#396]
@@ -103,7 +106,7 @@
 
 [#396]: https://github.com/actix/actix-net/pull/396
 
-## 3.0.0-beta.5 - 2021-03-29
+## 3.0.0-beta.5
 
 - Changed `connect::ssl::rustls::RustlsConnectorService` to return error when `DNSNameRef` generation failed instead of panic. [#296]
 - Remove `connect::ssl::openssl::OpensslConnectServiceFactory`. [#297]
@@ -117,7 +120,7 @@
 [#297]: https://github.com/actix/actix-net/pull/297
 [#299]: https://github.com/actix/actix-net/pull/299
 
-## 3.0.0-beta.4 - 2021-02-24
+## 3.0.0-beta.4
 
 - Rename `accept::openssl::{SslStream => TlsStream}`.
 - Add `connect::Connect::set_local_addr` to attach local `IpAddr`. [#282]
@@ -125,7 +128,7 @@
 
 [#282]: https://github.com/actix/actix-net/pull/282
 
-## 3.0.0-beta.3 - 2021-02-06
+## 3.0.0-beta.3
 
 - Remove `trust-dns-proto` and `trust-dns-resolver`. [#248]
 - Use `std::net::ToSocketAddrs` as simple and basic default resolver. [#248]
@@ -139,13 +142,13 @@
 [#248]: https://github.com/actix/actix-net/pull/248
 [#273]: https://github.com/actix/actix-net/pull/273
 
-## 3.0.0-beta.2 - 2022-xx-xx
+## 3.0.0-beta.2
 
 - Depend on stable trust-dns packages. [#204]
 
 [#204]: https://github.com/actix/actix-net/pull/204
 
-## 3.0.0-beta.1 - 2020-12-29
+## 3.0.0-beta.1
 
 - Move acceptors under `accept` module. [#238]
 - Merge `actix-connect` crate under `connect` module. [#238]
@@ -153,7 +156,7 @@
 
 [#238]: https://github.com/actix/actix-net/pull/238
 
-## 2.0.0 - 2020-09-03
+## 2.0.0
 
 - `nativetls::NativeTlsAcceptor` is renamed to `nativetls::Acceptor`.
 - Where possible, "SSL" terminology is replaced with "TLS".
@@ -161,28 +164,28 @@
   - `TlsError::Ssl` enum variant is renamed to `TlsError::Tls`.
   - `max_concurrent_ssl_connect` is renamed to `max_concurrent_tls_connect`.
 
-## 2.0.0-alpha.2 - 2020-08-17
+## 2.0.0-alpha.2
 
 - Update `rustls` dependency to 0.18
 - Update `tokio-rustls` dependency to 0.14
 - Update `webpki-roots` dependency to 0.20
 
-## [2.0.0-alpha.1] - 2020-03-03
+## [2.0.0-alpha.1]
 
 - Update `rustls` dependency to 0.17
 - Update `tokio-rustls` dependency to 0.13
 - Update `webpki-roots` dependency to 0.19
 
-## [1.0.0] - 2019-12-11
+## [1.0.0]
 
 - 1.0.0 release
 
-## [1.0.0-alpha.3] - 2019-12-07
+## [1.0.0-alpha.3]
 
 - Migrate to tokio 0.2
 - Enable rustls acceptor service
 - Enable native-tls acceptor service
 
-## [1.0.0-alpha.1] - 2019-12-02
+## [1.0.0-alpha.1]
 
 - Split openssl acceptor from actix-server package

actix-tls/Cargo.toml

@@ -9,7 +9,7 @@ description = "TLS acceptor and connector services for Actix ecosystem"
 keywords = ["network", "tls", "ssl", "async", "transport"]
 repository = "https://github.com/actix/actix-net.git"
 categories = ["network-programming", "asynchronous", "cryptography"]
-license = "MIT OR Apache-2.0"
+license.workspace = true
 edition.workspace = true
 rust-version.workspace = true
 
@@ -29,8 +29,14 @@ connect = []
 # use openssl impls
 openssl = ["tls-openssl", "tokio-openssl"]
 
-# use rustls impls
+# alias for backwards compat
-rustls = ["tokio-rustls", "webpki-roots"]
+rustls = ["rustls-0_20"]
+
+# use rustls v0.20 impls
+rustls-0_20 = ["tokio-rustls-023", "webpki-roots-022"]
+
+# use rustls v0.21 impls
+rustls-0_21 = ["tokio-rustls-024", "webpki-roots-025"]
 
 # use native-tls impls
 native-tls = ["tokio-native-tls"]
@@ -57,9 +63,13 @@ http = { version = "0.2.3", optional = true }
 tls-openssl = { package = "openssl", version = "0.10.48", optional = true }
 tokio-openssl = { version = "0.6", optional = true }
 
-# rustls
+# rustls v0.20
-tokio-rustls = { version = "0.23", optional = true }
+tokio-rustls-023 = { package = "tokio-rustls", version = "0.23", optional = true }
-webpki-roots = { version = "0.22", optional = true }
+webpki-roots-022 = { package = "webpki-roots", version = "0.22", optional = true }
+
+# rustls v0.21
+tokio-rustls-024 = { package = "tokio-rustls", version = "0.24", optional = true }
+webpki-roots-025 = { package = "webpki-roots", version = "0.25", optional = true }
 
 # native-tls
 tokio-native-tls = { version = "0.3", optional = true }
@@ -72,11 +82,11 @@ bytes = "1"
 env_logger = "0.10"
 futures-util = { version = "0.3.17", default-features = false, features = ["sink"] }
 log = "0.4"
-rcgen = "0.10"
+rcgen = "0.11"
 rustls-pemfile = "1"
-tokio-rustls = { version = "0.23", features = ["dangerous_configuration"] }
+tokio-rustls-024 = { package = "tokio-rustls", version = "0.24", features = ["dangerous_configuration"] }
-trust-dns-resolver = "0.22"
+trust-dns-resolver = "0.23"
 
 [[example]]
 name = "accept-rustls"
-required-features = ["accept", "rustls"]
+required-features = ["accept", "rustls-0_21"]

actix-tls/examples/accept-rustls.rs

@@ -17,12 +17,13 @@
 
 #[rustfmt::skip]
 // this `use` is only exists because of how we have organised the crate
-// it is not necessary for your actual code; you should import from `rustls` directly
+// it is not necessary for your actual code; you should import from `rustls` normally
-use tokio_rustls::rustls;
+use tokio_rustls_024::rustls;
 
 use std::{
     fs::File,
     io::{self, BufReader},
+    path::PathBuf,
     sync::{
         atomic::{AtomicUsize, Ordering},
         Arc,
@@ -32,7 +33,7 @@ use std::{
 use actix_rt::net::TcpStream;
 use actix_server::Server;
 use actix_service::ServiceFactoryExt as _;
-use actix_tls::accept::rustls::{Acceptor as RustlsAcceptor, TlsStream};
+use actix_tls::accept::rustls_0_21::{Acceptor as RustlsAcceptor, TlsStream};
 use futures_util::future::ok;
 use rustls::{server::ServerConfig, Certificate, PrivateKey};
 use rustls_pemfile::{certs, rsa_private_keys};
@@ -42,9 +43,16 @@ use tracing::info;
 async fn main() -> io::Result<()> {
     env_logger::init_from_env(env_logger::Env::default().default_filter_or("info"));
 
+    let root_path = env!("CARGO_MANIFEST_DIR")
+        .parse::<PathBuf>()
+        .unwrap()
+        .join("examples");
+    let cert_path = root_path.clone().join("cert.pem");
+    let key_path = root_path.clone().join("key.pem");
+
     // Load TLS key and cert files
-    let cert_file = &mut BufReader::new(File::open("./examples/cert.pem").unwrap());
+    let cert_file = &mut BufReader::new(File::open(cert_path).unwrap());
-    let key_file = &mut BufReader::new(File::open("./examples/key.pem").unwrap());
+    let key_file = &mut BufReader::new(File::open(key_path).unwrap());
 
     let cert_chain = certs(cert_file)
         .unwrap()
@@ -64,7 +72,7 @@ async fn main() -> io::Result<()> {
     let count = Arc::new(AtomicUsize::new(0));
 
     let addr = ("127.0.0.1", 8443);
-    info!("starting server on port: {}", &addr.0);
+    info!("starting server at: {addr:?}");
 
     Server::build()
         .bind("tls-example", addr, move || {

actix-tls/src/accept/mod.rs

@@ -12,15 +12,27 @@ use actix_utils::counter::Counter;
 #[cfg(feature = "openssl")]
 pub mod openssl;
 
-#[cfg(feature = "rustls")]
+#[cfg(feature = "rustls-0_20")]
-pub mod rustls;
+pub mod rustls_0_20;
+
+#[doc(hidden)]
+#[cfg(feature = "rustls-0_20")]
+pub use rustls_0_20 as rustls;
+
+#[cfg(feature = "rustls-0_21")]
+pub mod rustls_0_21;
 
 #[cfg(feature = "native-tls")]
 pub mod native_tls;
 
 pub(crate) static MAX_CONN: AtomicUsize = AtomicUsize::new(256);
 
-#[cfg(any(feature = "openssl", feature = "rustls", feature = "native-tls"))]
+#[cfg(any(
+    feature = "openssl",
+    feature = "rustls-0_20",
+    feature = "rustls-0_21",
+    feature = "native-tls",
+))]
 pub(crate) const DEFAULT_TLS_HANDSHAKE_TIMEOUT: std::time::Duration =
     std::time::Duration::from_secs(3);
 

actix-tls/src/accept/rustls_0_20.rs

@@ -1,4 +1,4 @@
-//! `rustls` based TLS connection acceptor service.
+//! `rustls` v0.20 based TLS connection acceptor service.
 //!
 //! See [`Acceptor`] for main service factory docs.
 
@@ -24,13 +24,14 @@ use actix_utils::{
 use pin_project_lite::pin_project;
 use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};
 use tokio_rustls::{rustls::ServerConfig, Accept, TlsAcceptor};
+use tokio_rustls_023 as tokio_rustls;
 
 use super::{TlsError, DEFAULT_TLS_HANDSHAKE_TIMEOUT, MAX_CONN_COUNTER};
 
 pub mod reexports {
     //! Re-exports from `rustls` that are useful for acceptors.
 
-    pub use tokio_rustls::rustls::ServerConfig;
+    pub use tokio_rustls_023::rustls::ServerConfig;
 }
 
 /// Wraps a `rustls` based async TLS stream in order to implement [`ActixStream`].

actix-tls/src/accept/rustls_0_21.rs

@@ -0,0 +1,198 @@
+//! `rustls` v0.21 based TLS connection acceptor service.
+//!
+//! See [`Acceptor`] for main service factory docs.
+
+use std::{
+    convert::Infallible,
+    future::Future,
+    io::{self, IoSlice},
+    pin::Pin,
+    sync::Arc,
+    task::{Context, Poll},
+    time::Duration,
+};
+
+use actix_rt::{
+    net::{ActixStream, Ready},
+    time::{sleep, Sleep},
+};
+use actix_service::{Service, ServiceFactory};
+use actix_utils::{
+    counter::{Counter, CounterGuard},
+    future::{ready, Ready as FutReady},
+};
+use pin_project_lite::pin_project;
+use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};
+use tokio_rustls::{rustls::ServerConfig, Accept, TlsAcceptor};
+use tokio_rustls_024 as tokio_rustls;
+
+use super::{TlsError, DEFAULT_TLS_HANDSHAKE_TIMEOUT, MAX_CONN_COUNTER};
+
+pub mod reexports {
+    //! Re-exports from `rustls` that are useful for acceptors.
+
+    pub use tokio_rustls_024::rustls::ServerConfig;
+}
+
+/// Wraps a `rustls` based async TLS stream in order to implement [`ActixStream`].
+pub struct TlsStream<IO>(tokio_rustls::server::TlsStream<IO>);
+
+impl_more::impl_from!(<IO> in tokio_rustls::server::TlsStream<IO> => TlsStream<IO>);
+impl_more::impl_deref_and_mut!(<IO> in TlsStream<IO> => tokio_rustls::server::TlsStream<IO>);
+
+impl<IO: ActixStream> AsyncRead for TlsStream<IO> {
+    fn poll_read(
+        self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+        buf: &mut ReadBuf<'_>,
+    ) -> Poll<io::Result<()>> {
+        Pin::new(&mut **self.get_mut()).poll_read(cx, buf)
+    }
+}
+
+impl<IO: ActixStream> AsyncWrite for TlsStream<IO> {
+    fn poll_write(
+        self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+        buf: &[u8],
+    ) -> Poll<io::Result<usize>> {
+        Pin::new(&mut **self.get_mut()).poll_write(cx, buf)
+    }
+
+    fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
+        Pin::new(&mut **self.get_mut()).poll_flush(cx)
+    }
+
+    fn poll_shutdown(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
+        Pin::new(&mut **self.get_mut()).poll_shutdown(cx)
+    }
+
+    fn poll_write_vectored(
+        self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+        bufs: &[IoSlice<'_>],
+    ) -> Poll<io::Result<usize>> {
+        Pin::new(&mut **self.get_mut()).poll_write_vectored(cx, bufs)
+    }
+
+    fn is_write_vectored(&self) -> bool {
+        (**self).is_write_vectored()
+    }
+}
+
+impl<IO: ActixStream> ActixStream for TlsStream<IO> {
+    fn poll_read_ready(&self, cx: &mut Context<'_>) -> Poll<io::Result<Ready>> {
+        IO::poll_read_ready((**self).get_ref().0, cx)
+    }
+
+    fn poll_write_ready(&self, cx: &mut Context<'_>) -> Poll<io::Result<Ready>> {
+        IO::poll_write_ready((**self).get_ref().0, cx)
+    }
+}
+
+/// Accept TLS connections via the `rustls` crate.
+pub struct Acceptor {
+    config: Arc<ServerConfig>,
+    handshake_timeout: Duration,
+}
+
+impl Acceptor {
+    /// Constructs `rustls` based acceptor service factory.
+    pub fn new(config: ServerConfig) -> Self {
+        Acceptor {
+            config: Arc::new(config),
+            handshake_timeout: DEFAULT_TLS_HANDSHAKE_TIMEOUT,
+        }
+    }
+
+    /// Limit the amount of time that the acceptor will wait for a TLS handshake to complete.
+    ///
+    /// Default timeout is 3 seconds.
+    pub fn set_handshake_timeout(&mut self, handshake_timeout: Duration) -> &mut Self {
+        self.handshake_timeout = handshake_timeout;
+        self
+    }
+}
+
+impl Clone for Acceptor {
+    fn clone(&self) -> Self {
+        Self {
+            config: self.config.clone(),
+            handshake_timeout: self.handshake_timeout,
+        }
+    }
+}
+
+impl<IO: ActixStream> ServiceFactory<IO> for Acceptor {
+    type Response = TlsStream<IO>;
+    type Error = TlsError<io::Error, Infallible>;
+    type Config = ();
+    type Service = AcceptorService;
+    type InitError = ();
+    type Future = FutReady<Result<Self::Service, Self::InitError>>;
+
+    fn new_service(&self, _: ()) -> Self::Future {
+        let res = MAX_CONN_COUNTER.with(|conns| {
+            Ok(AcceptorService {
+                acceptor: self.config.clone().into(),
+                conns: conns.clone(),
+                handshake_timeout: self.handshake_timeout,
+            })
+        });
+
+        ready(res)
+    }
+}
+
+/// Rustls based acceptor service.
+pub struct AcceptorService {
+    acceptor: TlsAcceptor,
+    conns: Counter,
+    handshake_timeout: Duration,
+}
+
+impl<IO: ActixStream> Service<IO> for AcceptorService {
+    type Response = TlsStream<IO>;
+    type Error = TlsError<io::Error, Infallible>;
+    type Future = AcceptFut<IO>;
+
+    fn poll_ready(&self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
+        if self.conns.available(cx) {
+            Poll::Ready(Ok(()))
+        } else {
+            Poll::Pending
+        }
+    }
+
+    fn call(&self, req: IO) -> Self::Future {
+        AcceptFut {
+            fut: self.acceptor.accept(req),
+            timeout: sleep(self.handshake_timeout),
+            _guard: self.conns.get(),
+        }
+    }
+}
+
+pin_project! {
+    /// Accept future for Rustls service.
+    #[doc(hidden)]
+    pub struct AcceptFut<IO: ActixStream> {
+        fut: Accept<IO>,
+        #[pin]
+        timeout: Sleep,
+        _guard: CounterGuard,
+    }
+}
+
+impl<IO: ActixStream> Future for AcceptFut<IO> {
+    type Output = Result<TlsStream<IO>, TlsError<io::Error, Infallible>>;
+
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        let mut this = self.project();
+        match Pin::new(&mut this.fut).poll(cx) {
+            Poll::Ready(Ok(stream)) => Poll::Ready(Ok(TlsStream(stream))),
+            Poll::Ready(Err(err)) => Poll::Ready(Err(TlsError::Tls(err))),
+            Poll::Pending => this.timeout.poll(cx).map(|_| Err(TlsError::Timeout)),
+        }
+    }
+}

actix-tls/src/connect/mod.rs

@@ -27,8 +27,15 @@ mod uri;
 #[cfg(feature = "openssl")]
 pub mod openssl;
 
-#[cfg(feature = "rustls")]
+#[cfg(feature = "rustls-0_20")]
-pub mod rustls;
+pub mod rustls_0_20;
+
+#[doc(hidden)]
+#[cfg(feature = "rustls-0_20")]
+pub use rustls_0_20 as rustls;
+
+#[cfg(feature = "rustls-0_21")]
+pub mod rustls_0_21;
 
 #[cfg(feature = "native-tls")]
 pub mod native_tls;

actix-tls/src/connect/rustls_0_20.rs

@@ -20,22 +20,21 @@ use tokio_rustls::{
     rustls::{client::ServerName, ClientConfig, OwnedTrustAnchor, RootCertStore},
     Connect as RustlsConnect, TlsConnector as RustlsTlsConnector,
 };
-use tracing::trace;
+use tokio_rustls_023 as tokio_rustls;
-use webpki_roots::TLS_SERVER_ROOTS;
 
 use crate::connect::{Connection, Host};
 
 pub mod reexports {
     //! Re-exports from `rustls` and `webpki_roots` that are useful for connectors.
 
-    pub use tokio_rustls::{client::TlsStream as AsyncTlsStream, rustls::ClientConfig};
+    pub use tokio_rustls_023::{client::TlsStream as AsyncTlsStream, rustls::ClientConfig};
-    pub use webpki_roots::TLS_SERVER_ROOTS;
+    pub use webpki_roots_022::TLS_SERVER_ROOTS;
 }
 
 /// Returns standard root certificates from `webpki-roots` crate as a rustls certificate store.
 pub fn webpki_roots_cert_store() -> RootCertStore {
     let mut root_certs = RootCertStore::empty();
-    for cert in TLS_SERVER_ROOTS.0 {
+    for cert in webpki_roots_022::TLS_SERVER_ROOTS.0 {
         let cert = OwnedTrustAnchor::from_subject_spki_name_constraints(
             cert.subject,
             cert.spki,
@@ -102,12 +101,13 @@ where
     actix_service::always_ready!();
 
     fn call(&self, connection: Connection<R, IO>) -> Self::Future {
-        trace!("TLS handshake start for: {:?}", connection.hostname());
+        tracing::trace!("TLS handshake start for: {:?}", connection.hostname());
         let (stream, connection) = connection.replace_io(());
 
         match ServerName::try_from(connection.hostname()) {
             Ok(host) => ConnectFut::Future {
-                connect: RustlsTlsConnector::from(self.connector.clone()).connect(host, stream),
+                connect: RustlsTlsConnector::from(Arc::clone(&self.connector))
+                    .connect(host, stream),
                 connection: Some(connection),
             },
             Err(_) => ConnectFut::InvalidDns,
@@ -117,6 +117,7 @@ where
 
 /// Connect future for Rustls service.
 #[doc(hidden)]
+#[allow(clippy::large_enum_variant)]
 pub enum ConnectFut<R, IO> {
     /// See issue <https://github.com/briansmith/webpki/issues/54>
     InvalidDns,
@@ -131,17 +132,23 @@ where
     R: Host,
     IO: ActixStream,
 {
-    type Output = Result<Connection<R, AsyncTlsStream<IO>>, io::Error>;
+    type Output = io::Result<Connection<R, AsyncTlsStream<IO>>>;
 
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         match self.get_mut() {
-            Self::InvalidDns => Poll::Ready(Err(
+            Self::InvalidDns => Poll::Ready(Err(io::Error::new(
-                io::Error::new(io::ErrorKind::Other, "rustls currently only handles hostname-based connections. See https://github.com/briansmith/webpki/issues/54")
+                io::ErrorKind::Other,
-            )),
+                "Rustls v0.20 can only handle hostname-based connections. Enable the `rustls-0_21` \
-            Self::Future { connect, connection } => {
+                feature and use the Rustls v0.21 utilities to gain this feature.",
+            ))),
+
+            Self::Future {
+                connect,
+                connection,
+            } => {
                 let stream = ready!(Pin::new(connect).poll(cx))?;
                 let connection = connection.take().unwrap();
-                trace!("TLS handshake success: {:?}", connection.hostname());
+                tracing::trace!("TLS handshake success: {:?}", connection.hostname());
                 Poll::Ready(Ok(connection.replace_io(stream).1))
             }
         }

actix-tls/src/connect/rustls_0_21.rs

@@ -0,0 +1,154 @@
+//! Rustls based connector service.
+//!
+//! See [`TlsConnector`] for main connector service factory docs.
+
+use std::{
+    convert::TryFrom,
+    future::Future,
+    io,
+    pin::Pin,
+    sync::Arc,
+    task::{Context, Poll},
+};
+
+use actix_rt::net::ActixStream;
+use actix_service::{Service, ServiceFactory};
+use actix_utils::future::{ok, Ready};
+use futures_core::ready;
+use tokio_rustls::{
+    client::TlsStream as AsyncTlsStream,
+    rustls::{client::ServerName, ClientConfig, OwnedTrustAnchor, RootCertStore},
+    Connect as RustlsConnect, TlsConnector as RustlsTlsConnector,
+};
+use tokio_rustls_024 as tokio_rustls;
+
+use crate::connect::{Connection, Host};
+
+pub mod reexports {
+    //! Re-exports from `rustls` and `webpki_roots` that are useful for connectors.
+
+    pub use tokio_rustls_024::{client::TlsStream as AsyncTlsStream, rustls::ClientConfig};
+    pub use webpki_roots_025::TLS_SERVER_ROOTS;
+}
+
+/// Returns standard root certificates from `webpki-roots` crate as a rustls certificate store.
+pub fn webpki_roots_cert_store() -> RootCertStore {
+    let mut root_certs = RootCertStore::empty();
+    for cert in webpki_roots_025::TLS_SERVER_ROOTS {
+        let cert = OwnedTrustAnchor::from_subject_spki_name_constraints(
+            cert.subject,
+            cert.spki,
+            cert.name_constraints,
+        );
+        let certs = vec![cert].into_iter();
+        root_certs.add_trust_anchors(certs);
+    }
+    root_certs
+}
+
+/// Connector service factory using `rustls`.
+#[derive(Clone)]
+pub struct TlsConnector {
+    connector: Arc<ClientConfig>,
+}
+
+impl TlsConnector {
+    /// Constructs new connector service factory from a `rustls` client configuration.
+    pub fn new(connector: Arc<ClientConfig>) -> Self {
+        TlsConnector { connector }
+    }
+
+    /// Constructs new connector service from a `rustls` client configuration.
+    pub fn service(connector: Arc<ClientConfig>) -> TlsConnectorService {
+        TlsConnectorService { connector }
+    }
+}
+
+impl<R, IO> ServiceFactory<Connection<R, IO>> for TlsConnector
+where
+    R: Host,
+    IO: ActixStream + 'static,
+{
+    type Response = Connection<R, AsyncTlsStream<IO>>;
+    type Error = io::Error;
+    type Config = ();
+    type Service = TlsConnectorService;
+    type InitError = ();
+    type Future = Ready<Result<Self::Service, Self::InitError>>;
+
+    fn new_service(&self, _: ()) -> Self::Future {
+        ok(TlsConnectorService {
+            connector: self.connector.clone(),
+        })
+    }
+}
+
+/// Connector service using `rustls`.
+#[derive(Clone)]
+pub struct TlsConnectorService {
+    connector: Arc<ClientConfig>,
+}
+
+impl<R, IO> Service<Connection<R, IO>> for TlsConnectorService
+where
+    R: Host,
+    IO: ActixStream,
+{
+    type Response = Connection<R, AsyncTlsStream<IO>>;
+    type Error = io::Error;
+    type Future = ConnectFut<R, IO>;
+
+    actix_service::always_ready!();
+
+    fn call(&self, connection: Connection<R, IO>) -> Self::Future {
+        tracing::trace!("TLS handshake start for: {:?}", connection.hostname());
+        let (stream, connection) = connection.replace_io(());
+
+        match ServerName::try_from(connection.hostname()) {
+            Ok(host) => ConnectFut::Future {
+                connect: RustlsTlsConnector::from(Arc::clone(&self.connector))
+                    .connect(host, stream),
+                connection: Some(connection),
+            },
+            Err(_) => ConnectFut::InvalidServerName,
+        }
+    }
+}
+
+/// Connect future for Rustls service.
+#[doc(hidden)]
+#[allow(clippy::large_enum_variant)]
+pub enum ConnectFut<R, IO> {
+    InvalidServerName,
+    Future {
+        connect: RustlsConnect<IO>,
+        connection: Option<Connection<R, ()>>,
+    },
+}
+
+impl<R, IO> Future for ConnectFut<R, IO>
+where
+    R: Host,
+    IO: ActixStream,
+{
+    type Output = io::Result<Connection<R, AsyncTlsStream<IO>>>;
+
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        match self.get_mut() {
+            Self::InvalidServerName => Poll::Ready(Err(io::Error::new(
+                io::ErrorKind::InvalidInput,
+                "connection parameters specified invalid server name",
+            ))),
+
+            Self::Future {
+                connect,
+                connection,
+            } => {
+                let stream = ready!(Pin::new(connect).poll(cx))?;
+                let connection = connection.take().unwrap();
+                tracing::trace!("TLS handshake success: {:?}", connection.hostname());
+                Poll::Ready(Ok(connection.replace_io(stream).1))
+            }
+        }
+    }
+}

actix-tls/tests/accept-openssl.rs

@@ -3,7 +3,7 @@
 #![cfg(all(
     feature = "accept",
     feature = "connect",
-    feature = "rustls",
+    feature = "rustls-0_21",
     feature = "openssl"
 ))]
 
@@ -15,6 +15,7 @@ use actix_service::ServiceFactoryExt as _;
 use actix_tls::accept::openssl::{Acceptor, TlsStream};
 use actix_utils::future::ok;
 use tokio_rustls::rustls::{Certificate, ClientConfig, RootCertStore, ServerName};
+use tokio_rustls_024 as tokio_rustls;
 
 fn new_cert_and_key() -> (String, String) {
     let cert =
@@ -49,7 +50,7 @@ fn openssl_acceptor(cert: String, key: String) -> tls_openssl::ssl::SslAcceptor
 mod danger {
     use std::time::SystemTime;
 
-    use tokio_rustls::rustls::{
+    use tokio_rustls_024::rustls::{
         self,
         client::{ServerCertVerified, ServerCertVerifier},
     };

actix-tls/tests/accept-rustls.rs

@@ -3,7 +3,7 @@
 #![cfg(all(
     feature = "accept",
     feature = "connect",
-    feature = "rustls",
+    feature = "rustls-0_21",
     feature = "openssl"
 ))]
 
@@ -15,13 +15,14 @@ use actix_rt::net::TcpStream;
 use actix_server::TestServer;
 use actix_service::ServiceFactoryExt as _;
 use actix_tls::{
-    accept::rustls::{Acceptor, TlsStream},
+    accept::rustls_0_21::{Acceptor, TlsStream},
     connect::openssl::reexports::SslConnector,
 };
 use actix_utils::future::ok;
 use rustls_pemfile::{certs, pkcs8_private_keys};
 use tls_openssl::ssl::SslVerifyMode;
 use tokio_rustls::rustls::{self, Certificate, PrivateKey, ServerConfig};
+use tokio_rustls_024 as tokio_rustls;
 
 fn new_cert_and_key() -> (String, String) {
     let cert =

actix-tls/tests/test_connect.rs

@@ -30,7 +30,7 @@ async fn test_string() {
     assert_eq!(con.peer_addr().unwrap(), srv.addr());
 }
 
-#[cfg(feature = "rustls")]
+#[cfg(feature = "rustls-0_21")]
 #[actix_rt::test]
 async fn test_rustls_string() {
     let srv = TestServer::start(|| {
@@ -114,7 +114,7 @@ async fn test_openssl_uri() {
     assert_eq!(con.peer_addr().unwrap(), srv.addr());
 }
 
-#[cfg(all(feature = "rustls", feature = "uri"))]
+#[cfg(all(feature = "rustls-0_21", feature = "uri"))]
 #[actix_rt::test]
 async fn test_rustls_uri() {
     use std::convert::TryFrom;

actix-utils/src/counter.rs

@@ -29,7 +29,7 @@ impl Counter {
 
     /// Returns true if counter is below capacity. Otherwise, register to wake task when it is.
     #[inline]
-    pub fn available(&self, cx: &mut task::Context<'_>) -> bool {
+    pub fn available(&self, cx: &task::Context<'_>) -> bool {
         self.0.available(cx)
     }
 
@@ -59,7 +59,7 @@ impl CounterInner {
         }
     }
 
-    fn available(&self, cx: &mut task::Context<'_>) -> bool {
+    fn available(&self, cx: &task::Context<'_>) -> bool {
         if self.count.get() < self.capacity {
             true
         } else {

actix-utils/src/future/poll_fn.rs

@@ -62,6 +62,7 @@ where
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         // SAFETY: we are not moving out of the pinned field
         // see https://github.com/rust-lang/rust/pull/102737
+        #[allow(clippy::needless_borrow)]
         (unsafe { &mut self.get_unchecked_mut().f })(cx)
     }
 }