spiffe_rustls/
server.rs

1use crate::error::Result;
2use crate::resolve::MaterialWatcher;
3use crate::types::{AuthorizeSpiffeId, authorize_any};
4use crate::verifier::SpiffeClientCertVerifier;
5use rustls::ServerConfig;
6use rustls::server::ResolvesServerCert;
7use spiffe::{TrustDomain, X509Source};
8use std::sync::Arc;
9
10/// Options for building a SPIFFE-aware `rustls::ServerConfig`.
11#[derive(Clone)]
12pub struct ServerConfigOptions {
13    /// Trust domain whose bundle is used as the verification root set.
14    pub trust_domain: TrustDomain,
15
16    /// Authorization hook invoked with the client SPIFFE ID.
17    ///
18    /// Returning `false` rejects the peer even if the certificate chain is valid.
19    pub authorize_client: AuthorizeSpiffeId,
20}
21
22impl ServerConfigOptions {
23    /// Creates options that accept any client SPIFFE ID for the given trust domain.
24    ///
25    /// Authentication still happens via bundle verification; only authorization is permissive.
26    pub fn allow_any(trust_domain: TrustDomain) -> Self {
27        Self {
28            trust_domain,
29            authorize_client: authorize_any(),
30        }
31    }
32}
33
34/// Builds a `rustls::ServerConfig` backed by an [`spiffe::X509Source`].
35///
36/// The resulting config:
37/// - presents the current SVID as the server certificate
38/// - requires and verifies client certificates (mTLS) using the trust domain bundle
39/// - authorizes the client by SPIFFE ID (URI SAN)
40///
41/// New handshakes use the latest SVID/bundle material after rotations.
42pub struct ServerConfigBuilder {
43    source: Arc<X509Source>,
44    opts: ServerConfigOptions,
45}
46
47impl ServerConfigBuilder {
48    /// Creates a new builder from an `X509Source` and options.
49    pub fn new(source: Arc<X509Source>, opts: ServerConfigOptions) -> Self {
50        Self { source, opts }
51    }
52
53    /// Builds the `rustls::ServerConfig`.
54    pub async fn build(self) -> Result<ServerConfig> {
55        // crate::crypto::ensure_crypto_provider_installed();
56
57        let watcher = MaterialWatcher::new(self.source, self.opts.trust_domain).await?;
58        let mat = watcher.current();
59
60        let resolver: Arc<dyn ResolvesServerCert> =
61            Arc::new(resolve_server::SpiffeServerCertResolver { watcher });
62
63        let verifier = Arc::new(SpiffeClientCertVerifier::new(
64            mat.roots.clone(),
65            self.opts.authorize_client,
66        )?);
67
68        let cfg = ServerConfig::builder()
69            .with_client_cert_verifier(verifier)
70            .with_cert_resolver(resolver);
71
72        Ok(cfg)
73    }
74}
75
76mod resolve_server {
77    use crate::resolve::MaterialWatcher;
78    use rustls::server::ResolvesServerCert;
79    use rustls::sign::CertifiedKey;
80    use std::sync::Arc;
81
82    #[derive(Clone, Debug)]
83    pub(crate) struct SpiffeServerCertResolver {
84        pub watcher: MaterialWatcher,
85    }
86
87    impl ResolvesServerCert for SpiffeServerCertResolver {
88        fn resolve(
89            &self,
90            _client_hello: rustls::server::ClientHello<'_>,
91        ) -> Option<Arc<CertifiedKey>> {
92            Some(self.watcher.current().certified_key.clone())
93        }
94    }
95}
spiffe_rustls/server.rs

spiffe_rustls/
server.rs
