docs(s2n-tls-hyper): Add hyper client/server example (#5069)

bindings/rust-examples/Cargo.toml

@@ -1,6 +1,8 @@
 [workspace]
 members = [
-    "client-hello-config-resolution", "tokio-server-client",
+    "client-hello-config-resolution",
+    "hyper-server-client",
+    "tokio-server-client",
 ]
 resolver = "2"
 

bindings/rust-examples/certs/ca-cert.pem

@@ -1,12 +1,12 @@
 -----BEGIN CERTIFICATE-----
-MIIB3DCCAWKgAwIBAgIUaAjZTaFhJNRyFtFQut1CdrY7RH0wCgYIKoZIzj0EAwMw
-HDELMAkGA1UEBhMCVVMxDTALBgNVBAMMBHJvb3QwIBcNMjQwMTI3MDAwODQ4WhgP
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+i5bAyEtIJW33HzZUuCpZpc6rhFLv97b4HIRdDd1kgSMYBwUfi371de/H24vuC/s=
 -----END CERTIFICATE-----

bindings/rust-examples/certs/generate.sh

@@ -36,6 +36,15 @@ openssl req  -new -noenc \
         -subj "/C=US/CN=kangaroo" \
         -addext "subjectAltName = DNS:www.kangaroo.com"
 
+echo "generating localhost private key and CSR"
+openssl req -new -noenc \
+        -newkey ec \
+        -pkeyopt ec_paramgen_curve:P-384 \
+        -keyout localhost-key.pem \
+        -out localhost.csr \
+        -subj "/C=US/CN=localhost" \
+        -addext "subjectAltName = DNS:localhost"
+
 echo "generating wombat server certificate and signing it"
 openssl x509 -days 65536 \
         -req -in wombat.csr \
@@ -56,6 +65,16 @@ openssl x509 -days 65536 \
         -out kangaroo-cert.pem \
         -copy_extensions=copyall
 
+echo "generating localhost certificate and signing it"
+openssl x509 -days 65536 \
+        -req -in localhost.csr \
+        -SHA384 \
+        -CA ca-cert.pem \
+        -CAkey ca-key.pem \
+        -CAcreateserial \
+        -out localhost-cert.pem \
+        -copy_extensions=copyall
+
 touch wombat-chain.pem
 cat wombat-cert.pem >> wombat-chain.pem
 cat ca-cert.pem >> wombat-chain.pem
@@ -64,17 +83,24 @@ touch kangaroo-chain.pem
 cat kangaroo-cert.pem >> kangaroo-chain.pem
 cat ca-cert.pem >> kangaroo-chain.pem
 
+touch localhost-chain.pem
+cat localhost-cert.pem >> localhost-chain.pem
+cat ca-cert.pem >> localhost-chain.pem
+
 echo "verifying server certificates"
 openssl verify -CAfile ca-cert.pem wombat-cert.pem
 openssl verify -CAfile ca-cert.pem kangaroo-cert.pem
+openssl verify -CAfile ca-cert.pem localhost-cert.pem
 
 # certificate signing requests are never used after the certs are generated
 rm wombat.csr
 rm kangaroo.csr
+rm localhost.csr
 rm ca-cert.srl
 
 # the private keys of the CA are never needed after signing
 rm ca-key.pem
 rm wombat-cert.pem
 rm kangaroo-cert.pem
+rm localhost-cert.pem
 

bindings/rust-examples/certs/kangaroo-chain.pem

@@ -1,25 +1,25 @@
 -----BEGIN CERTIFICATE-----
-MIIB3TCCAWKgAwIBAgIUJhUgxiGTEOtg0JBtu9SrS7PPvo0wCgYIKoZIzj0EAwMw
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+0w==
 -----END CERTIFICATE-----
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----

bindings/rust-examples/certs/kangaroo-key.pem

@@ -1,6 +1,6 @@
 -----BEGIN PRIVATE KEY-----
-MIG2AgEAMBAGByqGSM49AgEGBSuBBAAiBIGeMIGbAgEBBDB8OJA0z/nzPkogIasW
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 -----END PRIVATE KEY-----

bindings/rust-examples/certs/localhost-chain.pem

@@ -0,0 +1,24 @@
+-----BEGIN CERTIFICATE-----
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----

bindings/rust-examples/certs/localhost-key.pem

@@ -0,0 +1,6 @@
+-----BEGIN PRIVATE KEY-----
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+-----END PRIVATE KEY-----

bindings/rust-examples/certs/wombat-chain.pem

@@ -1,24 +1,24 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----

bindings/rust-examples/certs/wombat-key.pem

@@ -1,6 +1,6 @@
 -----BEGIN PRIVATE KEY-----
-MIG2AgEAMBAGByqGSM49AgEGBSuBBAAiBIGeMIGbAgEBBDDO2TkDRDnGfKAvjH9+
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 -----END PRIVATE KEY-----

bindings/rust-examples/hyper-server-client/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "hyper-server-client"
+version.workspace = true
+authors.workspace = true
+publish.workspace = true
+license.workspace = true
+edition.workspace = true
+
+[dependencies]
+s2n-tls = { path = "../../rust/extended/s2n-tls" }
+s2n-tls-tokio = { path = "../../rust/extended/s2n-tls-tokio" }
+s2n-tls-hyper = { path = "../../rust/standard/s2n-tls-hyper" }
+tokio = { version = "1", features = ["full"] }
+hyper = { version = "1" }
+hyper-util = { version = "0.1", features = ["client-legacy", "server", "tokio", "http1", "http2"]}
+http-body-util = { version = "0.1" }
+clap = { version = "4", features = ["derive"]}
+http = { version = "1" }
+bytes = { version = "1" }

bindings/rust-examples/hyper-server-client/README.md

@@ -0,0 +1,20 @@
+This example demonstrates how to use s2n-tls with the [hyper](https://hyper.rs/) HTTP library.
+
+The server example demonstrates how to use s2n-tls with the [hyper-util server](https://docs.rs/hyper-util/latest/hyper_util/server/conn/auto/struct.Builder.html). The client example demonstrates how to use s2n-tls with the [hyper-util client](https://docs.rs/hyper-util/latest/hyper_util/client/legacy/struct.Builder.html), via the [s2n-tls-hyper](../../rust/standard/s2n-tls-hyper) compatibility crate.
+
+Start the example server as follows:
+```
+cargo run --bin server
+```
+
+The server will listen for incoming TLS connections, and echo the contents of HTTP requests back to the client in an HTTP response.
+
+Connect to the server with the example client as follows:
+```
+cargo run --bin client -- --body "some text to send to the server"
+```
+
+The example client simply sends a GET request to the server, and can be configured to use a different server address:
+```
+cargo run --bin client -- --addr www.amazon.com
+```

bindings/rust-examples/hyper-server-client/src/bin/client.rs

@@ -0,0 +1,60 @@
+// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+use bytes::Bytes;
+use clap::Parser;
+use http_body_util::{BodyExt, Full};
+use hyper_util::{client::legacy::Client, rt::TokioExecutor};
+use std::error::Error;
+use std::str::FromStr;
+
+/// NOTE: this CA is to be used for demonstration purposes only!
+const CA: &[u8] = include_bytes!(concat!(env!("CARGO_MANIFEST_DIR"), "/../certs/ca-cert.pem"));
+
+#[derive(Parser)]
+struct Args {
+    #[clap(short, long, default_value = "localhost:8888")]
+    addr: String,
+    #[clap(short, long, default_value = "")]
+    body: String,
+}
+
+async fn run_client(addr: &str, request_body: Vec<u8>) -> Result<(), Box<dyn Error>> {
+    // Configure the s2n-tls client.
+    let config = {
+        let mut builder = s2n_tls::config::Builder::new();
+        builder.trust_pem(CA)?;
+        builder.build()?
+    };
+
+    // Create a hyper-util client with this configuration, using the s2n-tls-hyper HttpsConnector.
+    let connector = s2n_tls_hyper::connector::HttpsConnector::new(config);
+    let client: Client<_, Full<Bytes>> = Client::builder(TokioExecutor::new()).build(connector);
+
+    // Create an HTTP request to send to the server.
+    let uri = http::Uri::from_str(format!("https://{addr}/").as_str())?;
+    let request: http::Request<Full<Bytes>> = http::Request::builder()
+        .method(http::Method::GET)
+        .uri(uri)
+        .body(Full::from(request_body.clone()))?;
+
+    // Send the request to the server.
+    let response = client.request(request).await?;
+    assert_eq!(response.status(), http::StatusCode::OK);
+
+    // Get the response body.
+    let response_body = response.into_body().collect().await?.to_bytes();
+    println!(
+        "Response body: \n{}",
+        String::from_utf8_lossy(&response_body)
+    );
+
+    Ok(())
+}
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn Error>> {
+    let args = Args::parse();
+    run_client(&args.addr, args.body.into_bytes()).await?;
+    Ok(())
+}