Implement external domain cert syncing

README.md

@@ -118,6 +118,16 @@ domain:
       # http_url is set.
       #https_disabled: false
 
+  # External domains will have a TLS key/cert generated and signed for them, but
+  # which will not be served by domani itself. The key/cert files will be placed
+  # in the configured paths.
+  #
+  # HTTPS must be enabled for external_domains to be used.
+  #external_domains:
+    #example.com
+    #  tls_key_path: /dir/path/key.pem
+    #  tls_cert_path: /dir/path/cert.pem
+
 service:
 
   # Passphrase which must be given by users who are configuring new domains via

src/domain/acme.rs

@@ -1,2 +1,3 @@
+pub mod account_key_store;
 pub mod manager;
 pub mod store;

src/domain/acme/account_key_store.rs

@@ -0,0 +1,86 @@
+use std::io::{Read, Write};
+use std::{fs, path};
+
+use crate::domain::tls::PrivateKey;
+use crate::error::unexpected::{self, Mappable};
+use crate::util;
+
+#[mockall::automock]
+pub trait Store {
+    fn set(&self, k: &PrivateKey) -> Result<(), unexpected::Error>;
+    fn get(&self) -> unexpected::Result<Option<PrivateKey>>;
+}
+
+pub struct FSStore {
+    dir_path: path::PathBuf,
+}
+
+impl FSStore {
+    pub fn new(dir_path: &path::Path) -> Result<Self, unexpected::Error> {
+        fs::create_dir_all(dir_path).or_unexpected()?;
+        Ok(Self {
+            dir_path: dir_path.into(),
+        })
+    }
+
+    fn account_key_path(&self) -> path::PathBuf {
+        self.dir_path.join("account.key")
+    }
+}
+
+impl Store for FSStore {
+    fn set(&self, k: &PrivateKey) -> Result<(), unexpected::Error> {
+        let path = self.account_key_path();
+        {
+            let mut file = fs::File::create(&path).or_unexpected_while("creating file")?;
+            file.write_all(k.to_string().as_bytes())
+                .or_unexpected_while("writing file")
+        }
+        .map_unexpected_while(|| format!("path is {}", path.display()))?;
+        Ok(())
+    }
+
+    fn get(&self) -> unexpected::Result<Option<PrivateKey>> {
+        let path = self.account_key_path();
+        {
+            let mut file =
+                match util::open_file(path.as_path()).or_unexpected_while("opening_file")? {
+                    Some(file) => file,
+                    None => return Ok(None),
+                };
+
+            let mut key = String::new();
+            file.read_to_string(&mut key)
+                .or_unexpected_while("reading file")?;
+
+            let key: PrivateKey = key.parse().or_unexpected_while("parsing private key")?;
+
+            unexpected::Result::<Option<PrivateKey>>::Ok(Some(key))
+        }
+        .map_unexpected_while(|| format!("path is {}", path.display()))
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::domain::tls;
+    use tempdir::TempDir;
+
+    #[test]
+    fn account_key() {
+        let tmp_dir = TempDir::new("domain_acme_account_key_store").unwrap();
+        let store = FSStore::new(tmp_dir.path()).expect("store created");
+
+        assert!(matches!(
+            store.get(),
+            unexpected::Result::<Option<PrivateKey>>::Ok(None)
+        ));
+
+        let k = tls::PrivateKey::new();
+
+        store.set(&k).expect("account private key set");
+
+        assert_eq!(Some(k), store.get().expect("account private key retrieved"));
+    }
+}

src/domain/acme/manager.rs

@@ -1,8 +1,8 @@
 use std::{sync, time};
 
 use crate::domain::acme;
-use crate::domain::tls::{Certificate, PrivateKey};
+use crate::domain::tls::{Certificate, CertificateChain, PrivateKey};
-use crate::error::unexpected::{self, Intoable, Mappable};
+use crate::error::unexpected::{self, Mappable};
 use crate::{domain, token, util};
 
 const LETS_ENCRYPT_URL: &str = "https://acme-v02.api.letsencrypt.org/directory";
@@ -16,39 +16,53 @@ pub enum GetHttp01ChallengeKeyError {
     Unexpected(#[from] unexpected::Error),
 }
 
-pub type GetCertificateError = acme::store::GetCertificateError;
-
 #[mockall::automock]
 pub trait Manager {
     fn sync_domain<'mgr>(
         &'mgr self,
         domain: domain::Name,
-    ) -> util::BoxFuture<'mgr, Result<(), unexpected::Error>>;
+        external_config: Option<domain::ConfigExternalDomain>,
+    ) -> util::BoxFuture<'mgr, unexpected::Result<()>>;
 
     fn get_http01_challenge_key(&self, token: &str) -> Result<String, GetHttp01ChallengeKeyError>;
 
-    /// Returned vec is guaranteed to have len > 0
     fn get_certificate(
         &self,
         domain: &str,
-    ) -> Result<(PrivateKey, Vec<Certificate>), GetCertificateError>;
+    ) -> unexpected::Result<Option<(PrivateKey, CertificateChain)>>;
 }
 
 pub struct ManagerImpl {
     store: Box<dyn acme::store::Store + Send + Sync>,
     token_store: Box<dyn token::Store + Send + Sync>,
     account: sync::Arc<acme2::Account>,
+    external_store_fn: Box<
+        dyn Fn(
+                &domain::ConfigExternalDomain,
+            ) -> unexpected::Result<Box<dyn acme::store::Store + Send + Sync>>
+            + Send
+            + Sync,
+    >,
 }
 
 impl ManagerImpl {
-    pub async fn new<AcmeStore, TokenStore>(
+    pub async fn new<ExternalAcmeStoreFn, AcmeStore, TokenStore, AccountKeyStore>(
         store: AcmeStore,
         token_store: TokenStore,
+        account_key_store: AccountKeyStore,
+        external_store_fn: ExternalAcmeStoreFn,
         config: &domain::ConfigACME,
-    ) -> Result<Self, unexpected::Error>
+    ) -> unexpected::Result<Self>
     where
+        ExternalAcmeStoreFn: Fn(
+                &domain::ConfigExternalDomain,
+            ) -> unexpected::Result<Box<dyn acme::store::Store + Send + Sync>>
+            + Send
+            + Sync
+            + 'static,
         AcmeStore: acme::store::Store + Send + Sync + 'static,
         TokenStore: token::Store + Send + Sync + 'static,
+        AccountKeyStore: acme::account_key_store::Store + Send + Sync + 'static,
     {
         let dir = acme2::DirectoryBuilder::new(LETS_ENCRYPT_URL.to_string())
             .build()
@@ -62,19 +76,16 @@ impl ManagerImpl {
         builder.contact(vec![contact]);
         builder.terms_of_service_agreed(true);
 
-        match store.get_account_key() {
+        if let Some(account_key) = account_key_store
-            Ok(account_key) => {
+            .get()
+            .or_unexpected_while("fetching account key")?
+        {
             builder.private_key(
                 (&account_key)
                     .try_into()
                     .or_unexpected_while("parsing private key")?,
             );
         }
-            Err(acme::store::GetAccountKeyError::NotFound) => (),
-            Err(acme::store::GetAccountKeyError::Unexpected(err)) => {
-                return Err(err.into_unexpected())
-            }
-        }
 
         let account = builder
             .build()
@@ -87,14 +98,15 @@ impl ManagerImpl {
             .try_into()
             .or_unexpected_while("parsing private key back out")?;
 
-        store
+        account_key_store
-            .set_account_key(&account_key)
+            .set(&account_key)
             .or_unexpected_while("storing account key")?;
 
         Ok(Self {
             store: Box::from(store),
             token_store: Box::from(token_store),
             account,
+            external_store_fn: Box::from(external_store_fn),
         })
     }
 }
@@ -103,16 +115,26 @@ impl Manager for ManagerImpl {
     fn sync_domain<'mgr>(
         &'mgr self,
         domain: domain::Name,
+        external_config: Option<domain::ConfigExternalDomain>,
     ) -> util::BoxFuture<'mgr, Result<(), unexpected::Error>> {
         Box::pin(async move {
+            let external_store;
+            let store = match external_config {
+                None => &self.store,
+                Some(config) => {
+                    external_store = (self.external_store_fn)(&config).or_unexpected()?;
+                    &external_store
+                }
+            };
+
             // if there's an existing cert, and its expiry (determined by the soonest value of
             // not_after amongst its parts) is later than 30 days from now, then we consider it to
             // be synced.
-            if let Ok((_, cert)) = self.store.get_certificate(domain.as_str()) {
+            if let Ok(Some((_, certs))) = store.get_certificate(domain.as_str()) {
                 let thirty_days = openssl::asn1::Asn1Time::days_from_now(30)
                     .expect("parsed thirty days from now as Asn1Time");
 
-                let cert_with_soonest_not_after = cert
+                let cert_with_soonest_not_after = certs
                     .into_iter()
                     .map(|cert| openssl::x509::X509::try_from(&cert))
                     .try_collect::<Vec<openssl::x509::X509>>()
@@ -280,7 +302,7 @@ impl Manager for ManagerImpl {
 
             // Download the certificate, and panic if it doesn't exist.
             log::info!("Fetching certificate for domain {}", domain.as_str());
-            let cert = order
+            let certs = order
                 .certificate()
                 .await
                 .or_unexpected_while("fetching certificate")?
@@ -292,19 +314,19 @@ impl Manager for ManagerImpl {
                 .try_collect::<Vec<Certificate>>()
                 .or_unexpected_while("parsing certificate")?;
 
-            if cert.len() <= 1 {
+            if certs.len() <= 1 {
                 return Err(unexpected::Error::from(
                     format!(
                         "expected more than one certificate to be returned, instead got {}",
-                        cert.len(),
+                        certs.len(),
                     )
                     .as_str(),
                 ));
             }
 
             log::info!("Certificate for {} successfully retrieved", domain.as_str());
-            self.store
+            store
-                .set_certificate(domain.as_str(), pkey, cert)
+                .set_certificate(domain.as_str(), pkey, certs.into())
                 .or_unexpected_while("storing new cert")?;
 
             Ok(())
@@ -323,7 +345,7 @@ impl Manager for ManagerImpl {
     fn get_certificate(
         &self,
         domain: &str,
-    ) -> Result<(PrivateKey, Vec<Certificate>), GetCertificateError> {
+    ) -> unexpected::Result<Option<(PrivateKey, CertificateChain)>> {
         self.store.get_certificate(domain)
     }
 }

src/domain/acme/store.rs

@@ -1,193 +1,24 @@
-use std::io::{Read, Write};
+mod json_fs_store;
-use std::str::FromStr;
+pub use json_fs_store::*;
-use std::{fs, path};
 
-use crate::domain::tls::{Certificate, PrivateKey};
+mod direct_fs_store;
-use crate::error::unexpected::{self, Mappable};
+pub use direct_fs_store::*;
-use crate::util;
 
-use serde::{Deserialize, Serialize};
+use crate::domain::tls::{CertificateChain, PrivateKey};
-
+use crate::error::unexpected;
-#[derive(thiserror::Error, Debug)]
-pub enum GetAccountKeyError {
-    #[error("not found")]
-    NotFound,
-
-    #[error(transparent)]
-    Unexpected(#[from] unexpected::Error),
-}
-
-#[derive(thiserror::Error, Debug)]
-pub enum GetCertificateError {
-    #[error("not found")]
-    NotFound,
-
-    #[error(transparent)]
-    Unexpected(#[from] unexpected::Error),
-}
 
 #[mockall::automock]
 pub trait Store {
-    fn set_account_key(&self, k: &PrivateKey) -> Result<(), unexpected::Error>;
-    fn get_account_key(&self) -> Result<PrivateKey, GetAccountKeyError>;
-
     fn set_certificate(
         &self,
         domain: &str,
         key: PrivateKey,
-        cert: Vec<Certificate>,
+        cert: CertificateChain,
     ) -> Result<(), unexpected::Error>;
 
-    /// Returned vec is guaranteed to have len > 0
+    /// Returned chain is guaranteed to have len > 0
     fn get_certificate(
         &self,
         domain: &str,
-    ) -> Result<(PrivateKey, Vec<Certificate>), GetCertificateError>;
+    ) -> unexpected::Result<Option<(PrivateKey, CertificateChain)>>;
-}
-
-#[derive(Debug, Serialize, Deserialize)]
-struct StoredPKeyCert {
-    private_key: PrivateKey,
-    cert: Vec<Certificate>,
-}
-
-pub struct FSStore {
-    dir_path: path::PathBuf,
-}
-
-impl FSStore {
-    pub fn new(dir_path: &path::Path) -> Result<Self, unexpected::Error> {
-        vec![
-            dir_path,
-            dir_path.join("http01_challenge_keys").as_ref(),
-            dir_path.join("certificates").as_ref(),
-        ]
-        .iter()
-        .map(|dir| {
-            fs::create_dir_all(dir)
-                .map_unexpected_while(|| format!("creating dir {}", dir.display()))
-        })
-        .try_collect()?;
-
-        Ok(Self {
-            dir_path: dir_path.into(),
-        })
-    }
-
-    fn account_key_path(&self) -> path::PathBuf {
-        self.dir_path.join("account.key")
-    }
-
-    fn certificate_path(&self, domain: &str) -> path::PathBuf {
-        let mut domain = domain.to_string();
-        domain.push_str(".json");
-
-        self.dir_path.join("certificates").join(domain)
-    }
-}
-
-impl Store for FSStore {
-    fn set_account_key(&self, k: &PrivateKey) -> Result<(), unexpected::Error> {
-        let path = self.account_key_path();
-        {
-            let mut file = fs::File::create(&path).or_unexpected_while("creating file")?;
-            file.write_all(k.to_string().as_bytes())
-                .or_unexpected_while("writing file")
-        }
-        .map_unexpected_while(|| format!("path is {}", path.display()))?;
-        Ok(())
-    }
-
-    fn get_account_key(&self) -> Result<PrivateKey, GetAccountKeyError> {
-        let path = self.account_key_path();
-        {
-            let mut file =
-                match util::open_file(path.as_path()).or_unexpected_while("opening_file")? {
-                    Some(file) => file,
-                    None => return Err(GetAccountKeyError::NotFound),
-                };
-
-            let mut key = String::new();
-            file.read_to_string(&mut key)
-                .or_unexpected_while("reading file")?;
-
-            let key = PrivateKey::from_str(&key).or_unexpected_while("parsing private key")?;
-
-            Ok::<PrivateKey, unexpected::Error>(key)
-        }
-        .map_unexpected_while(|| format!("path is {}", path.display()))
-        .map_err(|err| err.into())
-    }
-
-    fn set_certificate(
-        &self,
-        domain: &str,
-        key: PrivateKey,
-        cert: Vec<Certificate>,
-    ) -> Result<(), unexpected::Error> {
-        let to_store = StoredPKeyCert {
-            private_key: key,
-            cert,
-        };
-
-        let path = self.certificate_path(domain);
-        {
-            let cert_file =
-                fs::File::create(path.as_path()).or_unexpected_while("creating file")?;
-            serde_json::to_writer(cert_file, &to_store).or_unexpected_while("writing cert to file")
-        }
-        .map_unexpected_while(|| format!("path is {}", path.display()))
-    }
-
-    fn get_certificate(
-        &self,
-        domain: &str,
-    ) -> Result<(PrivateKey, Vec<Certificate>), GetCertificateError> {
-        let path = self.certificate_path(domain);
-        {
-            let file = match util::open_file(path.as_path()).or_unexpected_while("opening_file")? {
-                Some(file) => file,
-                None => return Err(GetCertificateError::NotFound),
-            };
-
-            let stored: StoredPKeyCert =
-                serde_json::from_reader(file).or_unexpected_while("parsing json")?;
-
-            Ok::<(PrivateKey, Vec<Certificate>), unexpected::Error>((
-                stored.private_key,
-                stored.cert,
-            ))
-        }
-        .map_unexpected_while(|| format!("path is {}", path.display()))
-        .map_err(|err| err.into())
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::domain::tls;
-    use tempdir::TempDir;
-
-    #[test]
-    fn account_key() {
-        let tmp_dir = TempDir::new("domain_acme_store_account_key").unwrap();
-        let store = FSStore::new(tmp_dir.path()).expect("store created");
-
-        assert!(matches!(
-            store.get_account_key(),
-            Err::<PrivateKey, GetAccountKeyError>(GetAccountKeyError::NotFound)
-        ));
-
-        let k = tls::PrivateKey::new();
-
-        store.set_account_key(&k).expect("account private key set");
-
-        assert_eq!(
-            k,
-            store
-                .get_account_key()
-                .expect("account private key retrieved")
-        );
-    }
 }

src/domain/acme/store/direct_fs_store.rs

@@ -0,0 +1,70 @@
+use std::{fs, path};
+
+use crate::domain::tls::{CertificateChain, PrivateKey};
+use crate::error::unexpected::{self, Mappable};
+use crate::util;
+
+pub struct DirectFSStore {
+    key_file_path: path::PathBuf,
+    cert_file_path: path::PathBuf,
+}
+
+impl DirectFSStore {
+    pub fn new( key_file_path: &path::Path, cert_file_path: &path::Path,) -> Self {
+        Self {
+            key_file_path: key_file_path.into(),
+            cert_file_path: cert_file_path.into(),
+        }
+    }
+}
+
+impl super::Store for DirectFSStore {
+    fn set_certificate(
+        &self,
+        _domain: &str,
+        key: PrivateKey,
+        cert: CertificateChain,
+    ) -> unexpected::Result<()> {
+        fs::write(&self.key_file_path, key.to_string()).map_unexpected_while(|| {
+            format!("writing private key to {}", &self.key_file_path.display())
+        })?;
+
+        fs::write(&self.cert_file_path, cert.to_string()).map_unexpected_while(|| {
+            format!("writing certificate to {}", &self.cert_file_path.display())
+        })?;
+
+        Ok(())
+    }
+
+    fn get_certificate(
+        &self,
+        _domain: &str,
+    ) -> unexpected::Result<Option<(PrivateKey, CertificateChain)>> {
+        let key: Option<PrivateKey> =
+            util::parse_file(&self.key_file_path).map_unexpected_while(|| {
+                format!("reading private key from {}", &self.key_file_path.display())
+            })?;
+
+        let certs: Option<CertificateChain> = util::parse_file(&self.cert_file_path)
+            .map_unexpected_while(|| {
+                format!(
+                    "reading certificate from {}",
+                    &self.cert_file_path.display()
+                )
+            })?;
+
+        if key.is_none() != certs.is_none() {
+        }
+
+        match (key, certs) {
+        (None, None) => Ok(None),
+        (Some(key), Some(certs)) => Ok(Some((key, certs))),
+        _ => 
+            Err(unexpected::Error::from(format!(
+                    "private key file {} and cert file {} are in inconsistent state, one exists but the other doesn't",
+                    &self.key_file_path.display(),
+                    &self.cert_file_path.display(),
+            ).as_str()))
+        }
+    }
+}

src/domain/acme/store/json_fs_store.rs

@@ -0,0 +1,78 @@
+use std::{fs, path};
+
+use crate::domain::tls::{Certificate, CertificateChain, PrivateKey};
+use crate::error::unexpected::{self, Mappable};
+use crate::util;
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Serialize, Deserialize)]
+struct StoredPKeyCert {
+    private_key: PrivateKey,
+    cert: Vec<Certificate>,
+}
+
+pub struct JSONFSStore {
+    dir_path: path::PathBuf,
+}
+
+impl JSONFSStore {
+    pub fn new(dir_path: &path::Path) -> unexpected::Result<Self> {
+        fs::create_dir_all(dir_path).or_unexpected()?;
+        Ok(Self {
+            dir_path: dir_path.into(),
+        })
+    }
+
+    fn certificate_path(&self, domain: &str) -> path::PathBuf {
+        let mut domain = domain.to_string();
+        domain.push_str(".json");
+
+        self.dir_path.join(domain)
+    }
+}
+
+impl super::Store for JSONFSStore {
+    fn set_certificate(
+        &self,
+        domain: &str,
+        key: PrivateKey,
+        certs: CertificateChain,
+    ) -> Result<(), unexpected::Error> {
+        let to_store = StoredPKeyCert {
+            private_key: key,
+            cert: certs.into(),
+        };
+
+        let path = self.certificate_path(domain);
+        {
+            let cert_file =
+                fs::File::create(path.as_path()).or_unexpected_while("creating file")?;
+            serde_json::to_writer(cert_file, &to_store).or_unexpected_while("writing cert to file")
+        }
+        .map_unexpected_while(|| format!("path is {}", path.display()))
+    }
+
+    fn get_certificate(
+        &self,
+        domain: &str,
+    ) -> unexpected::Result<Option<(PrivateKey, CertificateChain)>> {
+        let path = self.certificate_path(domain);
+        {
+            let file = match util::open_file(path.as_path()).or_unexpected_while("opening_file")? {
+                Some(file) => file,
+                None => return Ok(None),
+            };
+
+            let stored: StoredPKeyCert =
+                serde_json::from_reader(file).or_unexpected_while("parsing json")?;
+
+            unexpected::Result::<Option<(PrivateKey, CertificateChain)>>::Ok(Some((
+                stored.private_key,
+                stored.cert.into(),
+            )))
+        }
+        .map_unexpected_while(|| format!("path is {}", path.display()))
+        .map_err(|err| err.into())
+    }
+}

src/domain/config.rs

@@ -58,6 +58,13 @@ pub struct ConfigProxiedDomain {
     pub https_disabled: bool,
 }
 
+#[serde_as]
+#[derive(Clone, Deserialize, Serialize)]
+pub struct ConfigExternalDomain {
+    pub tls_key_path: path::PathBuf,
+    pub tls_cert_path: path::PathBuf,
+}
+
 #[derive(Clone, Deserialize, Serialize)]
 pub struct Config {
     pub store_dir_path: path::PathBuf,
@@ -73,4 +80,7 @@ pub struct Config {
 
     #[serde(default = "default_interface_domain")]
     pub interface_domain: Option<domain::Name>,
+
+    #[serde(default)]
+    pub external_domains: collections::HashMap<domain::Name, ConfigExternalDomain>,
 }

src/domain/manager.rs

@@ -10,6 +10,7 @@ pub enum GetSettingsResult {
     Builtin(domain::config::ConfigBuiltinDomain),
     Proxied(domain::config::ConfigProxiedDomain),
     Interface,
+    External(domain::config::ConfigExternalDomain),
 }
 
 #[derive(thiserror::Error, Debug)]
@@ -222,7 +223,22 @@ impl ManagerImpl {
     async fn sync_domain_https_cert(&self, domain: &domain::Name) -> unexpected::Result<()> {
         if let Some(ref acme_manager) = self.acme_manager {
             log::info!("Syncing HTTPS certificate for domain {domain}");
-            acme_manager.sync_domain(domain.clone()).await?;
+            acme_manager.sync_domain(domain.clone(), None).await?;
+        }
+
+        Ok(())
+    }
+
+    async fn sync_external_domain(
+        &self,
+        domain: &domain::Name,
+        config: &domain::ConfigExternalDomain,
+    ) -> unexpected::Result<()> {
+        if let Some(ref acme_manager) = self.acme_manager {
+            log::info!("Syncing HTTPS certificate for external domain {domain}");
+            acme_manager
+                .sync_domain(domain.clone(), Some(config.clone()))
+                .await?;
         }
 
         Ok(())
@@ -247,6 +263,14 @@ impl ManagerImpl {
                 GetSettingsResult::Proxied(config) => (None, !config.https_disabled, false),
 
                 GetSettingsResult::Interface => (None, true, false),
+
+                // External domains do their own thing, separate from the rest of this flow.
+                GetSettingsResult::External(config) => {
+                    self.sync_external_domain(&domain, &config)
+                        .await
+                        .map_unexpected_while(|| format!("syncing external domain {domain}"))?;
+                    continue;
+                }
             };
 
             if let Some(settings) = settings {
@@ -301,6 +325,10 @@ impl Manager for ManagerImpl {
             return Ok(GetSettingsResult::Proxied(config.clone()));
         }
 
+        if let Some(config) = self.config.external_domains.get(domain) {
+            return Ok(GetSettingsResult::External(config.clone()));
+        }
+
         Ok(GetSettingsResult::Stored(self.domain_store.get(domain)?))
     }
 
@@ -322,6 +350,9 @@ impl Manager for ManagerImpl {
                     unexpected::Error::from("can't call get_file on interface domain").into(),
                 );
             }
+            GetSettingsResult::External(_) => {
+                return Err(GetFileError::DomainNotFound);
+            }
         };
 
         let path = settings.process_path(path);
@@ -342,8 +373,9 @@ impl Manager for ManagerImpl {
             let is_interface = Some(&domain) == self.config.interface_domain.as_ref();
             let is_builtin = self.config.builtin_domains.contains_key(&domain);
             let is_proxied = self.config.proxied_domains.contains_key(&domain);
+            let is_external = self.config.external_domains.contains_key(&domain);
 
-            if is_interface || is_builtin || is_proxied {
+            if is_interface || is_builtin || is_proxied || is_external {
                 return Err(SyncWithSettingsError::NotModifiable);
             }
 
@@ -422,6 +454,15 @@ impl Manager for ManagerImpl {
             })
         }
 
+        self.config
+            .external_domains
+            .iter()
+            .map(|(domain, _)| ManagedDomain {
+                domain: domain.clone(),
+                public: false,
+            })
+            .collect_into(&mut res);
+
         Ok(res)
     }
 }
@@ -442,12 +483,12 @@ impl rustls::server::ResolvesServerCert for HttpsCertResolver {
         let domain = client_hello.server_name()?;
 
         match (self.0).acme_manager.as_ref()?.get_certificate(domain) {
-            Err(acme::manager::GetCertificateError::NotFound) => {
+            Err(err) => Err(err),
+            Ok(None) => {
                 log::warn!("No cert found for domain {domain}");
                 Ok(None)
             }
-            Err(acme::manager::GetCertificateError::Unexpected(err)) => Err(err),
+            Ok(Some((key, cert))) => {
-            Ok((key, cert)) => {
                 match rustls::sign::any_supported_type(&key.into()).or_unexpected() {
                     Err(err) => Err(err),
                     Ok(key) => Ok(Some(sync::Arc::new(rustls::sign::CertifiedKey {

src/domain/tls.rs

@@ -2,4 +2,4 @@ mod private_key;
 pub use self::private_key::PrivateKey;
 
 mod certificate;
-pub use self::certificate::Certificate;
+pub use self::certificate::{Certificate, CertificateChain};

src/domain/tls/certificate.rs

@@ -113,3 +113,47 @@ impl From<Certificate> for rustls::Certificate {
         rustls::Certificate(c.0)
     }
 }
+
+pub struct CertificateChain(Vec<Certificate>);
+
+impl FromStr for CertificateChain {
+    type Err = pem::PemError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(CertificateChain(
+            pem::parse_many(s)?
+                .into_iter()
+                .map(|s| Certificate(s.into_contents()))
+                .collect(),
+        ))
+    }
+}
+
+impl fmt::Display for CertificateChain {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        for cert in &self.0 {
+            pem::Pem::new("CERTIFICATE", cert.0.clone()).fmt(f)?;
+        }
+        Ok(())
+    }
+}
+
+impl From<CertificateChain> for Vec<Certificate> {
+    fn from(c: CertificateChain) -> Self {
+        c.0
+    }
+}
+
+impl From<Vec<Certificate>> for CertificateChain {
+    fn from(v: Vec<Certificate>) -> Self {
+        Self(v)
+    }
+}
+
+impl std::iter::IntoIterator for CertificateChain {
+    type Item = Certificate;
+    type IntoIter = std::vec::IntoIter<Self::Item>;
+    fn into_iter(self) -> Self::IntoIter {
+        self.0.into_iter()
+    }
+}

src/main.rs

@@ -77,6 +77,10 @@ async fn main() {
             }
         }
 
+        if config.domain.external_domains.len() > 0 && config.service.http.https_addr.is_none() {
+            panic!("https must be enabled to use external_domains")
+        }
+
         config
     };
 
@@ -109,14 +113,39 @@ async fn main() {
             .clone()
             .expect("acme configuration must be set if https is enabled");
 
-        let domain_acme_store =
+        let acme_dir_path = config.domain.store_dir_path.join("acme");
-            domani::domain::acme::store::FSStore::new(&config.domain.store_dir_path.join("acme"))
+
-                .expect("domain acme store initialization failed");
+        let domain_acme_store = {
+            let dir_path = acme_dir_path.join("certificates");
+            domani::domain::acme::store::JSONFSStore::new(&dir_path).unwrap_or_else(|e| {
+                panic!(
+                    "failed to initialize acme cert store at {}: {e}",
+                    dir_path.display()
+                )
+            })
+        };
+
+        let domain_acme_account_key_store = domani::domain::acme::account_key_store::FSStore::new(
+            &acme_dir_path,
+        )
+        .unwrap_or_else(|e| {
+            panic!(
+                "failed to initialize account key store at {}: {e}",
+                acme_dir_path.display()
+            )
+        });
 
         Some(
             domani::domain::acme::manager::ManagerImpl::new(
                 domain_acme_store,
                 domani::token::MemStore::new(),
+                domain_acme_account_key_store,
+                |config| {
+                    Ok(Box::from(domani::domain::acme::store::DirectFSStore::new(
+                        &config.tls_key_path,
+                        &config.tls_cert_path,
+                    )))
+                },
                 &acme_config,
             )
             .await

src/service/http.rs

@@ -238,6 +238,7 @@ impl Service {
             }
             Ok(domain::manager::GetSettingsResult::Proxied(_)) => None,
             Ok(domain::manager::GetSettingsResult::Interface) => None,
+            Ok(domain::manager::GetSettingsResult::External(_)) => None,
             Err(domain::manager::GetSettingsError::NotFound) => None,
             Err(domain::manager::GetSettingsError::Unexpected(e)) => {
                 return self.internal_error(

src/util.rs

@@ -10,6 +10,27 @@ pub fn open_file(path: &path::Path) -> io::Result<Option<fs::File>> {
     }
 }
 
+#[derive(thiserror::Error, Debug)]
+pub enum ParseFileError<ParseError> {
+    #[error("io error: {0}")]
+    IO(io::Error),
+
+    #[error("parse error")]
+    FromStr(ParseError),
+}
+
+pub fn parse_file<T: std::str::FromStr>(
+    path: &path::Path,
+) -> Result<Option<T>, ParseFileError<T::Err>> {
+    match fs::read_to_string(path) {
+        Ok(s) => Ok(Some(s.parse().map_err(|e| ParseFileError::FromStr(e))?)),
+        Err(err) => match err.kind() {
+            io::ErrorKind::NotFound => Ok(None),
+            _ => Err(ParseFileError::IO(err)),
+        },
+    }
+}
+
 pub type BoxByteStream = futures::stream::BoxStream<'static, io::Result<bytes::Bytes>>;
 
 pub type BoxFuture<'a, O> = pin::Pin<Box<dyn futures::Future<Output = O> + Send + 'a>>;