use super::io::BoxedIo;
use crate::transport::{
server::{Connected, TlsStream},
Certificate, Identity,
};
#[cfg(feature = "tls-roots")]
use rustls_native_certs;
use std::{fmt, sync::Arc};
use tokio::io::{AsyncRead, AsyncWrite};
use tokio_rustls::{
rustls::{ClientConfig, RootCertStore, ServerConfig, ServerName},
TlsAcceptor as RustlsAcceptor, TlsConnector as RustlsConnector,
};
const ALPN_H2: &str = "h2";
#[derive(Debug)]
enum TlsError {
H2NotNegotiated,
CertificateParseError,
PrivateKeyParseError,
}
#[derive(Clone)]
pub(crate) struct TlsConnector {
config: Arc<ClientConfig>,
domain: Arc<ServerName>,
}
impl TlsConnector {
pub(crate) fn new(
ca_cert: Option<Certificate>,
identity: Option<Identity>,
domain: String,
) -> Result<Self, crate::Error> {
let builder = ClientConfig::builder().with_safe_defaults();
let mut roots = RootCertStore::empty();
#[cfg(feature = "tls-roots")]
{
match rustls_native_certs::load_native_certs() {
Ok(certs) => roots.add_parsable_certificates(
&certs.into_iter().map(|cert| cert.0).collect::<Vec<_>>(),
),
Err(error) => return Err(error.into()),
};
}
#[cfg(feature = "tls-webpki-roots")]
{
use tokio_rustls::rustls::OwnedTrustAnchor;
roots.add_server_trust_anchors(webpki_roots::TLS_SERVER_ROOTS.0.iter().map(|ta| {
OwnedTrustAnchor::from_subject_spki_name_constraints(
ta.subject,
ta.spki,
ta.name_constraints,
)
}));
}
if let Some(cert) = ca_cert {
rustls_keys::add_certs_from_pem(std::io::Cursor::new(&cert.pem[..]), &mut roots)?;
}
let builder = builder.with_root_certificates(roots);
let mut config = match identity {
Some(identity) => {
let (client_cert, client_key) = rustls_keys::load_identity(identity)?;
builder.with_single_cert(client_cert, client_key)?
}
None => builder.with_no_client_auth(),
};
config.alpn_protocols.push(ALPN_H2.as_bytes().to_vec());
Ok(Self {
config: Arc::new(config),
domain: Arc::new(domain.as_str().try_into()?),
})
}
pub(crate) async fn connect<I>(&self, io: I) -> Result<BoxedIo, crate::Error>
where
I: AsyncRead + AsyncWrite + Send + Unpin + 'static,
{
let tls_io = {
let io = RustlsConnector::from(self.config.clone())
.connect(self.domain.as_ref().to_owned(), io)
.await?;
let (_, session) = io.get_ref();
match session.alpn_protocol() {
Some(b) if b == b"h2" => (),
_ => return Err(TlsError::H2NotNegotiated.into()),
};
BoxedIo::new(io)
};
Ok(tls_io)
}
}
impl fmt::Debug for TlsConnector {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("TlsConnector").finish()
}
}
#[derive(Clone)]
pub(crate) struct TlsAcceptor {
inner: Arc<ServerConfig>,
}
impl TlsAcceptor {
pub(crate) fn new(
identity: Identity,
client_ca_root: Option<Certificate>,
client_auth_optional: bool,
) -> Result<Self, crate::Error> {
let builder = ServerConfig::builder().with_safe_defaults();
let builder = match (client_ca_root, client_auth_optional) {
(None, _) => builder.with_no_client_auth(),
(Some(cert), true) => {
use tokio_rustls::rustls::server::AllowAnyAnonymousOrAuthenticatedClient;
let mut roots = RootCertStore::empty();
rustls_keys::add_certs_from_pem(std::io::Cursor::new(&cert.pem[..]), &mut roots)?;
builder.with_client_cert_verifier(
AllowAnyAnonymousOrAuthenticatedClient::new(roots).boxed(),
)
}
(Some(cert), false) => {
use tokio_rustls::rustls::server::AllowAnyAuthenticatedClient;
let mut roots = RootCertStore::empty();
rustls_keys::add_certs_from_pem(std::io::Cursor::new(&cert.pem[..]), &mut roots)?;
builder.with_client_cert_verifier(AllowAnyAuthenticatedClient::new(roots).boxed())
}
};
let (cert, key) = rustls_keys::load_identity(identity)?;
let mut config = builder.with_single_cert(cert, key)?;
config.alpn_protocols.push(ALPN_H2.as_bytes().to_vec());
Ok(Self {
inner: Arc::new(config),
})
}
pub(crate) async fn accept<IO>(&self, io: IO) -> Result<TlsStream<IO>, crate::Error>
where
IO: AsyncRead + AsyncWrite + Connected + Unpin + Send + 'static,
{
let acceptor = RustlsAcceptor::from(self.inner.clone());
acceptor.accept(io).await.map_err(Into::into)
}
}
impl fmt::Debug for TlsAcceptor {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("TlsAcceptor").finish()
}
}
impl fmt::Display for TlsError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
TlsError::H2NotNegotiated => write!(f, "HTTP/2 was not negotiated."),
TlsError::CertificateParseError => write!(f, "Error parsing TLS certificate."),
TlsError::PrivateKeyParseError => write!(
f,
"Error parsing TLS private key - no RSA or PKCS8-encoded keys found."
),
}
}
}
impl std::error::Error for TlsError {}
mod rustls_keys {
use std::io::Cursor;
use tokio_rustls::rustls::{Certificate, PrivateKey, RootCertStore};
use crate::transport::service::tls::TlsError;
use crate::transport::Identity;
pub(super) fn load_rustls_private_key(
mut cursor: std::io::Cursor<&[u8]>,
) -> Result<PrivateKey, crate::Error> {
while let Ok(Some(item)) = rustls_pemfile::read_one(&mut cursor) {
match item {
rustls_pemfile::Item::RSAKey(key)
| rustls_pemfile::Item::PKCS8Key(key)
| rustls_pemfile::Item::ECKey(key) => return Ok(PrivateKey(key)),
_ => continue,
}
}
Err(Box::new(TlsError::PrivateKeyParseError))
}
pub(crate) fn load_identity(
identity: Identity,
) -> Result<(Vec<Certificate>, PrivateKey), crate::Error> {
let cert = {
let mut cert = std::io::Cursor::new(&identity.cert.pem[..]);
match rustls_pemfile::certs(&mut cert) {
Ok(certs) => certs.into_iter().map(Certificate).collect(),
Err(_) => return Err(Box::new(TlsError::CertificateParseError)),
}
};
let key = {
let key = std::io::Cursor::new(&identity.key[..]);
match load_rustls_private_key(key) {
Ok(key) => key,
Err(e) => {
return Err(e);
}
}
};
Ok((cert, key))
}
pub(crate) fn add_certs_from_pem(
mut certs: Cursor<&[u8]>,
roots: &mut RootCertStore,
) -> Result<(), crate::Error> {
let (_, ignored) = roots.add_parsable_certificates(&rustls_pemfile::certs(&mut certs)?);
match ignored == 0 {
true => Ok(()),
false => Err(Box::new(TlsError::CertificateParseError)),
}
}
}
#[cfg(test)]
mod tests {
use std::io::Cursor;
const SIMPLE_EC_KEY: &str = r#"-----BEGIN EC PARAMETERS-----
BggqhkjOPQMBBw==
-----END EC PARAMETERS-----
-----BEGIN EC PRIVATE KEY-----
MHcCAQEEICIDyh40kMVWGDAYr1gXnMfeMeO3zXYigOaWrg5SNB+zoAoGCCqGSM49
AwEHoUQDQgAEacJyVg299dkPTzUaMbOmACUfF67yp+ZrDhXVjn/5WxBAgjcmFBHg
Tw8dfwpMzaJPXX5lWYzP276fcmbRO25CXw==
-----END EC PRIVATE KEY-----"#;
const SIMPLE_PKCS8_KEY: &str = r#"-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----"#;
const SIMPLE_RSA_KEY: &str = r#"-----BEGIN RSA PRIVATE KEY-----
MIIEogIBAAKCAQEAoEILGds1/RGBHT7jM4R+EL24sQ6Bsn14GgTHc7WoZ7lainEH
H/n+DtHCYUXYyJnN5AMIi3pkigCP1hdXXBQga3zs3lXoi/mAMkT6vjuqQ7Xg5/95
ABx5Ztyy25mZNaXm77glyAzSscKHxWYooXVJYG4C3SGuBJJ1zVjxen6Rkzse5Lpr
yZOUUeqeV3M6KbJ/dkR37HFQVwmlctQukFnb4kozFBQDDnkXi9jT/PH00g6JpW3z
YMzdMq2RMadJ0dzYv62OtdtqmQpVz0dRu/yODV4DkhrWwgPRj2uY4DnYthzILESB
x41gxHj+jqo6NW+C+0fr6uh2CXtD0p+ZVANtBQIDAQABAoIBAE7IaOCrLV1dr5WL
BvKancbpHdSdBxGSMOrJkqvFkCZ9ro8EhbYolcb/Q4nCZpInWlpPS3IWFzroj811
6BJyKoXtAh1DKnE1lNohowrGFiv3S7uBkiCF3wC8Wokud20yQ9dxNdGkzCdrNIfM
cwj8ubfYHTxMhFnnDlaG9R98/V/dFy0FLxL37eMP/heMbcwKKm9P/G2FqvuCn8a4
FoPbAfvaR64IGCybjoiTjUD7xMHIV4Gr5K07br2TzG2zVlFTacoqXyGBbVVy+ibt
QMh0sn+rMkAy+cFse+yCYZeAFa4FzwGz43sdFviU7uvLG7yXpvZ+uDACFzxlxUVg
v57r1cECgYEA1MMJEe6IunDUyuzRaFNTfQX16QcAv/xLN/1TtVB3HUX5p2bIZKDr
XEl0NCVOrCoz5RsYqbtGmp8B4Yxl3DeX+WeWeD9/f2ZTVGWyBx1N6dZ5hRsyfzG/
xVBUqYxkChjXQ20cNtf8u7JKdnVjOJen9M92nXhFRTwgH83Id4gPp70CgYEAwNN8
lvVJnd05ekyf1qIKOSyKiSGnGa5288PpqsjYMZisXy12y4n8cK2pX5Z5PICHeJVu
K99WdTtO7Q4ghCXRB1jR5pTd4/3/3089SQyDnWz9jlA3pGWcSLDTB1dBJXpMQ6yG
cR2dX5hPDNIdKsc+9Bl/OF5PScvGVUYv4SLF6ukCgYAVhh2WyNDgO6XrWYXdzgA2
N7Im/uReh8F8So57W0aRmZCmFMnVFEp7LZsp41RQKnzRgqo+EYoU/l0MWk27t4wS
WR5pz9KwKsPnV9poydgl/eKRSq0THQ9PgM7v0BoWw2iTk6g1DCivPFw4G6wL/5uo
MozHZXFsjaaaUREktokO6QKBgC3Dg7RILtqaoIOYH+9OseJz4cU+CWyc7XpZKuHv
nO/YbkCAh8syyojrjmEzUz66umwx+t3KubhFBSxZx/nVB9EYkWiKOEdeBxY2tjLa
F3qLXXojK7GGtBrEbLE3UizU47jD/3xlLO59NXWzgFygwR4p1vnH2EWJaV7fs4lZ
OWPRAoGAL0nX0vZ0N9qPETiQan1uHjKYuuFiSP+cwRXVSUYIQM9qDRlKG9zjugwO
az+B6uiR4TrgbwG+faCQwcGk9B8QbcoIb8IigwrWe3XpVaEtcsqFORX0r+tJNDoY
I0O2DOQVPKSK2N5AZzXY4IkybWTV4Yxc7rdXEO3dOOpHGKbpwFQ=
-----END RSA PRIVATE KEY-----"#;
#[test]
fn test_parse_ec_key() {
for (n, key) in [SIMPLE_EC_KEY, SIMPLE_PKCS8_KEY, SIMPLE_RSA_KEY]
.iter()
.enumerate()
{
let c = Cursor::new(key.as_bytes());
let key = super::rustls_keys::load_rustls_private_key(c);
assert!(key.is_ok(), "at the {}-th case", n);
}
}
}