Add TLS1.3 support

src/imp/openssl.rs

@@ -32,6 +32,7 @@ fn supported_protocols(
             Protocol::Tlsv10 => SslVersion::TLS1,
             Protocol::Tlsv11 => SslVersion::TLS1_1,
             Protocol::Tlsv12 => SslVersion::TLS1_2,
+            Protocol::Tlsv13 => SslVersion::TLS1_3,
         }
     }
 

src/imp/schannel.rs

@@ -19,6 +19,7 @@ static PROTOCOLS: &'static [Protocol] = &[
     Protocol::Tls10,
     Protocol::Tls11,
     Protocol::Tls12,
+    Protocol::Tls13,
 ];
 
 fn convert_protocols(min: Option<::Protocol>, max: Option<::Protocol>) -> &'static [Protocol] {

src/imp/security_framework.rs

@@ -49,6 +49,7 @@ fn convert_protocol(protocol: Protocol) -> SslProtocol {
         Protocol::Tlsv10 => SslProtocol::TLS1,
         Protocol::Tlsv11 => SslProtocol::TLS11,
         Protocol::Tlsv12 => SslProtocol::TLS12,
+        Protocol::Tlsv13 => SslProtocol::TLS13,
     }
 }
 

src/lib.rs

@@ -322,6 +322,8 @@ pub enum Protocol {
     Tlsv11,
     /// The TLS 1.2 protocol.
     Tlsv12,
+    /// The TLS 1.3 protocol.
+    Tlsv13,
 }
 
 /// A builder for `TlsConnector`s.

src/test.rs

@@ -16,6 +16,25 @@ macro_rules! p {
     };
 }
 
+#[test]
+fn connect_google_tls13() {
+    let builder = p!(
+            TlsConnector::builder()
+            .min_protocol_version(Some(Protocol::Tlsv13))
+            .max_protocol_version(Some(Protocol::Tlsv13))
+            .build());
+    let s = p!(TcpStream::connect("google.com:443"));
+    let mut socket = p!(builder.connect("google.com", s));
+
+    p!(socket.write_all(b"GET / HTTP/1.0\r\n\r\n"));
+    let mut result = vec![];
+    p!(socket.read_to_end(&mut result));
+
+    println!("{}", String::from_utf8_lossy(&result));
+    assert!(result.starts_with(b"HTTP/1.0"));
+    assert!(result.ends_with(b"</HTML>\r\n") || result.ends_with(b"</html>"));
+}
+
 #[test]
 fn connect_google() {
     let builder = p!(TlsConnector::new());