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| 1 | +// SPDX-FileCopyrightText: © 2026 Phala Network <dstack@phala.network> |
| 2 | +// |
| 3 | +// SPDX-License-Identifier: Apache-2.0 |
| 4 | + |
| 5 | +#![cfg(feature = "client")] |
| 6 | + |
| 7 | +use std::sync::Arc; |
| 8 | + |
| 9 | +use prpc::client::RequestClient; |
| 10 | +use ra_rpc::client::RaClientConfig; |
| 11 | +use ra_tls::test_pki::{TestCa, TestCert}; |
| 12 | +use rustls::{ |
| 13 | + pki_types::PrivatePkcs8KeyDer, |
| 14 | + server::{ClientHello, ResolvesServerCert}, |
| 15 | + sign::CertifiedKey, |
| 16 | +}; |
| 17 | +use tokio::io::{AsyncReadExt, AsyncWriteExt}; |
| 18 | + |
| 19 | +#[derive(Debug)] |
| 20 | +struct FixedCertificate(Arc<CertifiedKey>); |
| 21 | + |
| 22 | +impl ResolvesServerCert for FixedCertificate { |
| 23 | + fn resolve(&self, _: ClientHello<'_>) -> Option<Arc<CertifiedKey>> { |
| 24 | + Some(self.0.clone()) |
| 25 | + } |
| 26 | +} |
| 27 | + |
| 28 | +#[tokio::test] |
| 29 | +async fn tls12_requires_the_server_certificate_key_even_without_ca_validation() { |
| 30 | + check_key_possession(&rustls::version::TLS12).await; |
| 31 | +} |
| 32 | + |
| 33 | +#[tokio::test] |
| 34 | +async fn tls13_requires_the_server_certificate_key_even_without_ca_validation() { |
| 35 | + check_key_possession(&rustls::version::TLS13).await; |
| 36 | +} |
| 37 | + |
| 38 | +async fn check_key_possession(version: &'static rustls::SupportedProtocolVersion) { |
| 39 | + for correct_key in [true, false] { |
| 40 | + let server_cert = TestCert::localhost().self_signed().unwrap(); |
| 41 | + let signing_key = if correct_key { |
| 42 | + server_cert.key_der() |
| 43 | + } else { |
| 44 | + TestCert::localhost().self_signed().unwrap().key_der() |
| 45 | + }; |
| 46 | + let ca = TestCa::new().unwrap(); |
| 47 | + let client_cert = TestCert::localhost().signed_by(&ca).unwrap(); |
| 48 | + let mut roots = rustls::RootCertStore::empty(); |
| 49 | + roots.add(ca.cert_key().cert.der().clone()).unwrap(); |
| 50 | + let provider = Arc::new(rustls::crypto::aws_lc_rs::default_provider()); |
| 51 | + let client_verifier = rustls::server::WebPkiClientVerifier::builder_with_provider( |
| 52 | + Arc::new(roots), |
| 53 | + provider.clone(), |
| 54 | + ) |
| 55 | + .build() |
| 56 | + .unwrap(); |
| 57 | + let signing_key = provider |
| 58 | + .key_provider |
| 59 | + .load_private_key(PrivatePkcs8KeyDer::from(signing_key).into()) |
| 60 | + .unwrap(); |
| 61 | + // A resolver permits deliberately pairing a stolen certificate with |
| 62 | + // another key, unlike with_single_cert which rejects it up front. |
| 63 | + let pinned_cert = server_cert.cert_der(); |
| 64 | + let certified = CertifiedKey::new(vec![server_cert.cert.der().clone()], signing_key); |
| 65 | + let config = rustls::ServerConfig::builder_with_provider(provider) |
| 66 | + .with_protocol_versions(&[version]) |
| 67 | + .unwrap() |
| 68 | + .with_client_cert_verifier(client_verifier) |
| 69 | + .with_cert_resolver(Arc::new(FixedCertificate(Arc::new(certified)))); |
| 70 | + let listener = tokio::net::TcpListener::bind("127.0.0.1:0").await.unwrap(); |
| 71 | + let address = listener.local_addr().unwrap(); |
| 72 | + let server = tokio::spawn(async move { |
| 73 | + let (stream, _) = listener.accept().await.unwrap(); |
| 74 | + let Ok(mut stream) = tokio_rustls::TlsAcceptor::from(Arc::new(config)) |
| 75 | + .accept(stream) |
| 76 | + .await |
| 77 | + else { |
| 78 | + return false; |
| 79 | + }; |
| 80 | + let mut request = [0; 4096]; |
| 81 | + if !matches!(stream.read(&mut request).await, Ok(n) if n > 0) { |
| 82 | + return false; |
| 83 | + } |
| 84 | + stream |
| 85 | + .write_all(b"HTTP/1.1 200 OK\r\nContent-Length: 4\r\nConnection: close\r\n\r\nnull") |
| 86 | + .await |
| 87 | + .unwrap(); |
| 88 | + true |
| 89 | + }); |
| 90 | + let client = RaClientConfig::builder() |
| 91 | + .remote_uri(format!("https://{address}")) |
| 92 | + .tls_skip_ca_verification(true) |
| 93 | + .tls_client_cert(client_cert.cert_pem()) |
| 94 | + .tls_client_key(client_cert.key_pem()) |
| 95 | + .verify_server_attestation(false) |
| 96 | + .cert_validator(Box::new(move |info| { |
| 97 | + let info = info.ok_or_else(|| anyhow::anyhow!("missing server certificate"))?; |
| 98 | + anyhow::ensure!(info.cert_der == pinned_cert, "server certificate changed"); |
| 99 | + Ok(()) |
| 100 | + })) |
| 101 | + .build() |
| 102 | + .into_client() |
| 103 | + .unwrap(); |
| 104 | + let result = client.request::<(), ()>("Probe", ()).await; |
| 105 | + assert_eq!(result.is_ok(), correct_key, "{version:?}: {result:?}"); |
| 106 | + assert_eq!(server.await.unwrap(), correct_key); |
| 107 | + } |
| 108 | +} |
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