From 36fabdadfd76c99b812ffcd38afb119e16a5162b Mon Sep 17 00:00:00 2001
From: quininer kel <quininer@live.com>
Date: Fri, 21 Jul 2017 17:57:57 +0800
Subject: [PATCH] [Added] danger feature

---
 Cargo.toml |  3 +++
 src/lib.rs | 29 +++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/Cargo.toml b/Cargo.toml
index 7e438ba..9c31b71 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,6 +10,9 @@ readme = "README.md"
 description = "Asynchronous TLS/SSL streams for Tokio using Rustls."
 categories = ["asynchronous", "cryptography", "network-programming"]
 
+[features]
+danger = [ "rustls/dangerous_configuration" ]
+
 [dependencies]
 futures = "0.1"
 tokio-io = "0.1"
diff --git a/src/lib.rs b/src/lib.rs
index d4d1aa5..1c1aa11 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -22,6 +22,11 @@ pub trait ClientConfigExt {
     fn connect_async<S>(&self, domain: &str, stream: S)
         -> ConnectAsync<S>
         where S: AsyncRead + AsyncWrite;
+
+    #[cfg(feature = "danger")]
+    fn danger_connect_async_without_providing_domain_for_certificate_verification_and_server_name_indication<S>(&self, stream: S)
+        -> ConnectAsync<S>
+        where S: AsyncRead + AsyncWrite;
 }
 
 /// Extension trait for the `Arc<ServerConfig>` type in the `rustls` crate.
@@ -48,6 +53,30 @@ impl ClientConfigExt for Arc<ClientConfig> {
     {
         connect_async_with_session(stream, ClientSession::new(self, domain))
     }
+
+    #[cfg(feature = "danger")]
+    fn danger_connect_async_without_providing_domain_for_certificate_verification_and_server_name_indication<S>(&self, stream: S)
+        -> ConnectAsync<S>
+        where S: AsyncRead + AsyncWrite
+    {
+        use rustls::{ ServerCertVerifier, RootCertStore, Certificate, TLSError };
+
+        struct NoCertVerifier;
+        impl ServerCertVerifier for NoCertVerifier {
+            fn verify_server_cert(&self, _: &RootCertStore, _: &[Certificate], _: &str)
+                -> Result<(), TLSError>
+            {
+                Ok(())
+            }
+        }
+
+        let mut client_config = ClientConfig::new();
+        client_config.clone_from(self);
+        client_config.dangerous()
+            .set_certificate_verifier(Box::new(NoCertVerifier));
+
+        Arc::new(client_config).connect_async("", stream)
+    }
 }
 
 #[inline]