feat: wip - configuration design

Cargo.toml

@@ -9,7 +9,7 @@ edition = "2021"
 publish = false
 
 [workspace]
-members = ["rpxy-bin", "rpxy-lib", "rpxy-certs"]
+members = ["rpxy-bin", "rpxy-lib", "rpxy-certs", "rpxy-acme"]
 exclude = ["submodules"]
 resolver = "2"
 

rpxy-acme/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "rpxy-acme"
+description = "ACME manager library for `rpxy`"
+version.workspace = true
+authors.workspace = true
+homepage.workspace = true
+repository.workspace = true
+license.workspace = true
+readme.workspace = true
+edition.workspace = true
+publish.workspace = true
+
+[dependencies]
+url = { version = "2.5.2" }
+rustc-hash = "2.0.0"
+thiserror = "1.0.62"
+tracing = "0.1.40"

rpxy-acme/src/constants.rs

@@ -0,0 +1,14 @@
+/// ACME directory url
+pub const ACME_DIR_URL: &str = "https://acme-v02.api.letsencrypt.org/directory";
+
+/// ACME registry path that stores account key and certificate
+pub const ACME_REGISTRY_PATH: &str = "./acme_registry";
+
+/// ACME accounts directory, subdirectory of ACME_REGISTRY_PATH
+pub(crate) const ACME_ACCOUNT_SUBDIR: &str = "account";
+
+/// ACME private key file name
+pub const ACME_PRIVATE_KEY_FILE_NAME: &str = "private_key.pem";
+
+/// ACME certificate file name
+pub const ACME_CERTIFICATE_FILE_NAME: &str = "certificate.pem";

rpxy-acme/src/error.rs

@@ -0,0 +1,15 @@
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+/// Error type for rpxy-acme
+pub enum RpxyAcmeError {
+  /// Invalid acme registry path
+  #[error("Invalid acme registry path")]
+  InvalidAcmeRegistryPath,
+  /// Invalid url
+  #[error("Invalid url: {0}")]
+  InvalidUrl(#[from] url::ParseError),
+  /// IO error
+  #[error("IO error: {0}")]
+  Io(#[from] std::io::Error),
+}

rpxy-acme/src/lib.rs

@@ -0,0 +1,12 @@
+mod constants;
+mod error;
+mod targets;
+
+#[allow(unused_imports)]
+mod log {
+  pub(super) use tracing::{debug, error, info, warn};
+}
+
+pub use constants::{ACME_CERTIFICATE_FILE_NAME, ACME_DIR_URL, ACME_PRIVATE_KEY_FILE_NAME, ACME_REGISTRY_PATH};
+pub use error::RpxyAcmeError;
+pub use targets::AcmeTargets;

rpxy-bin/Cargo.toml

@@ -13,14 +13,15 @@ publish.workspace = true
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [features]
-default = ["http3-quinn", "cache", "rustls-backend"]
-# default = ["http3-s2n", "cache", "rustls-backend"]
+default = ["http3-quinn", "cache", "rustls-backend", "acme"]
+# default = ["http3-s2n", "cache", "rustls-backend", "acme"]
 http3-quinn = ["rpxy-lib/http3-quinn"]
 http3-s2n = ["rpxy-lib/http3-s2n"]
 native-tls-backend = ["rpxy-lib/native-tls-backend"]
 rustls-backend = ["rpxy-lib/rustls-backend"]
 webpki-roots = ["rpxy-lib/webpki-roots"]
 cache = ["rpxy-lib/cache"]
+acme = ["rpxy-lib/acme", "rpxy-acme"]
 
 [dependencies]
 rpxy-lib = { path = "../rpxy-lib/", default-features = false, features = [
@@ -56,4 +57,6 @@ rpxy-certs = { path = "../rpxy-certs/", default-features = false, features = [
   "http3",
 ] }
 
+rpxy-acme = { path = "../rpxy-acme/", default-features = false, optional = true }
+
 [dev-dependencies]

rpxy-bin/src/config/mod.rs

@@ -3,7 +3,10 @@ mod service;
 mod toml;
 
 pub use {
-  self::toml::ConfigToml,
   parse::{build_cert_manager, build_settings, parse_opts},
   service::ConfigTomlReloader,
+  toml::ConfigToml,
 };
+
+#[cfg(feature = "acme")]
+pub use parse::build_acme_manager;

rpxy-bin/src/config/parse.rs

@@ -6,6 +6,9 @@ use rpxy_certs::{build_cert_reloader, CryptoFileSourceBuilder, CryptoReloader, S
 use rpxy_lib::{AppConfig, AppConfigList, ProxyConfig};
 use rustc_hash::FxHashMap as HashMap;
 
+#[cfg(feature = "acme")]
+use rpxy_acme::{AcmeTargets, ACME_CERTIFICATE_FILE_NAME, ACME_PRIVATE_KEY_FILE_NAME, ACME_REGISTRY_PATH};
+
 /// Parsed options
 pub struct Opts {
   pub config_file_path: String,
@@ -103,11 +106,34 @@ pub async fn build_cert_manager(
   if config.listen_port_tls.is_none() {
     return Ok(None);
   }
+
+  #[cfg(feature = "acme")]
+  let acme_option = config.experimental.as_ref().and_then(|v| v.acme.clone());
+  #[cfg(feature = "acme")]
+  let registry_path = acme_option
+    .as_ref()
+    .and_then(|v| v.registry_path.as_deref())
+    .unwrap_or(ACME_REGISTRY_PATH);
+
   let mut crypto_source_map = HashMap::default();
   for app in apps.0.values() {
     if let Some(tls) = app.tls.as_ref() {
-      ensure!(tls.tls_cert_key_path.is_some() && tls.tls_cert_path.is_some());
       let server_name = app.server_name.as_ref().ok_or(anyhow!("No server name"))?;
+
+      #[cfg(not(feature = "acme"))]
+      ensure!(tls.tls_cert_key_path.is_some() && tls.tls_cert_path.is_some());
+
+      #[cfg(feature = "acme")]
+      let tls = {
+        let mut tls = tls.clone();
+        if let Some(true) = tls.acme {
+          ensure!(acme_option.is_some() && tls.tls_cert_key_path.is_none() && tls.tls_cert_path.is_none());
+          tls.tls_cert_key_path = Some(format!("{registry_path}/{server_name}/{ACME_CERTIFICATE_FILE_NAME}"));
+          tls.tls_cert_path = Some(format!("{registry_path}/{server_name}/{ACME_PRIVATE_KEY_FILE_NAME}"));
+        }
+        tls
+      };
+
       let crypto_file_source = CryptoFileSourceBuilder::default()
         .tls_cert_path(tls.tls_cert_path.as_ref().unwrap())
         .tls_cert_key_path(tls.tls_cert_key_path.as_ref().unwrap())
@@ -119,3 +145,33 @@ pub async fn build_cert_manager(
   let res = build_cert_reloader(&crypto_source_map, None).await?;
   Ok(Some(res))
 }
+
+/* ----------------------- */
+#[cfg(feature = "acme")]
+/// Build acme manager and dummy cert and key as initial states if not exists
+/// TODO: CURRENTLY NOT IMPLEMENTED, UNDER DESIGNING
+pub async fn build_acme_manager(config: &ConfigToml) -> Result<(), anyhow::Error> {
+  let acme_option = config.experimental.as_ref().and_then(|v| v.acme.clone());
+  if acme_option.is_none() {
+    return Ok(());
+  }
+  let acme_option = acme_option.unwrap();
+  let mut acme_targets = AcmeTargets::try_new(
+    acme_option.email.as_ref(),
+    acme_option.dir_url.as_deref(),
+    acme_option.registry_path.as_deref(),
+  )
+  .map_err(|e| anyhow!("Invalid acme configuration: {e}"))?;
+
+  let apps = config.apps.as_ref().unwrap();
+  for app in apps.0.values() {
+    if let Some(tls) = app.tls.as_ref() {
+      if tls.acme.unwrap_or(false) {
+        acme_targets.add_target(app.server_name.as_ref().unwrap())?;
+      }
+    }
+  }
+  // TODO: remove later
+  println!("ACME targets: {:#?}", acme_targets);
+  Ok(())
+}

rpxy-bin/src/config/toml.rs

@@ -41,12 +41,25 @@ pub struct CacheOption {
   pub max_cache_each_size_on_memory: Option<usize>,
 }
 
+#[cfg(feature = "acme")]
+#[derive(Deserialize, Debug, Default, PartialEq, Eq, Clone)]
+pub struct AcmeOption {
+  pub dir_url: Option<String>,
+  pub email: String,
+  pub registry_path: Option<String>,
+}
+
 #[derive(Deserialize, Debug, Default, PartialEq, Eq, Clone)]
 pub struct Experimental {
   #[cfg(any(feature = "http3-quinn", feature = "http3-s2n"))]
   pub h3: Option<Http3Option>,
+
   #[cfg(feature = "cache")]
   pub cache: Option<CacheOption>,
+
+  #[cfg(feature = "acme")]
+  pub acme: Option<AcmeOption>,
+
   pub ignore_sni_consistency: Option<bool>,
   pub connection_handling_timeout: Option<u64>,
 }
@@ -67,6 +80,8 @@ pub struct TlsOption {
   pub tls_cert_key_path: Option<String>,
   pub https_redirection: Option<bool>,
   pub client_ca_cert_path: Option<String>,
+  #[cfg(feature = "acme")]
+  pub acme: Option<bool>,
 }
 
 #[derive(Deserialize, Debug, Default, PartialEq, Eq, Clone)]
@@ -222,8 +237,19 @@ impl Application {
     // tls settings
     let tls_config = if self.tls.is_some() {
       let tls = self.tls.as_ref().unwrap();
+
+      #[cfg(not(feature = "acme"))]
       ensure!(tls.tls_cert_key_path.is_some() && tls.tls_cert_path.is_some());
 
+      #[cfg(feature = "acme")]
+      {
+        if tls.acme.unwrap_or(false) {
+          ensure!(tls.tls_cert_key_path.is_none() && tls.tls_cert_path.is_none());
+        } else {
+          ensure!(tls.tls_cert_key_path.is_some() && tls.tls_cert_path.is_some());
+        }
+      }
+
       let https_redirection = if tls.https_redirection.is_none() {
         true // Default true
       } else {
@@ -233,6 +259,8 @@ impl Application {
       Some(TlsConfig {
         mutual_tls: tls.client_ca_cert_path.is_some(),
         https_redirection,
+        #[cfg(feature = "acme")]
+        acme: tls.acme.unwrap_or(false),
       })
     } else {
       None

rpxy-bin/src/main.rs

@@ -6,6 +6,8 @@ mod constants;
 mod error;
 mod log;
 
+#[cfg(feature = "acme")]
+use crate::config::build_acme_manager;
 use crate::{
   config::{build_cert_manager, build_settings, parse_opts, ConfigToml, ConfigTomlReloader},
   constants::CONFIG_WATCH_DELAY_SECS,
@@ -66,6 +68,9 @@ async fn rpxy_service_without_watcher(
   let config_toml = ConfigToml::new(config_file_path).map_err(|e| anyhow!("Invalid toml file: {e}"))?;
   let (proxy_conf, app_conf) = build_settings(&config_toml).map_err(|e| anyhow!("Invalid configuration: {e}"))?;
 
+  #[cfg(feature = "acme")] // TODO: CURRENTLY NOT IMPLEMENTED, UNDER DESIGNING
+  let acme_manager = build_acme_manager(&config_toml).await;
+
   let cert_service_and_rx = build_cert_manager(&config_toml)
     .await
     .map_err(|e| anyhow!("Invalid cert configuration: {e}"))?;
@@ -88,6 +93,9 @@ async fn rpxy_service_with_watcher(
     .ok_or(anyhow!("Something wrong in config reloader receiver"))?;
   let (mut proxy_conf, mut app_conf) = build_settings(&config_toml).map_err(|e| anyhow!("Invalid configuration: {e}"))?;
 
+  #[cfg(feature = "acme")] // TODO: CURRENTLY NOT IMPLEMENTED, UNDER DESIGNING
+  let acme_manager = build_acme_manager(&config_toml).await;
+
   let mut cert_service_and_rx = build_cert_manager(&config_toml)
     .await
     .map_err(|e| anyhow!("Invalid cert configuration: {e}"))?;

rpxy-certs/src/reloader_service.rs

@@ -46,10 +46,13 @@ impl Reload<ServerCryptoBase> for CryptoReloader {
     let mut server_crypto_base = ServerCryptoBase::default();
 
     for (server_name_bytes, crypto_source) in self.inner.iter() {
-      let certs_keys = crypto_source.read().await.map_err(|e| {
-        error!("Failed to reload cert, key or ca cert: {e}");
-        ReloaderError::<ServerCryptoBase>::Reload("Failed to reload cert, key or ca cert")
-      })?;
+      let certs_keys = match crypto_source.read().await {
+        Ok(certs_keys) => certs_keys,
+        Err(e) => {
+          error!("Failed to read certs and keys, skip at this time: {}", e);
+          continue;
+        }
+      };
       server_crypto_base.inner.insert(server_name_bytes.clone(), certs_keys);
     }
 

rpxy-lib/Cargo.toml

@@ -13,8 +13,8 @@ publish.workspace = true
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [features]
-# default = ["http3-s2n", "sticky-cookie", "cache", "rustls-backend"]
-default = ["http3-quinn", "sticky-cookie", "cache", "rustls-backend"]
+# default = ["http3-s2n", "sticky-cookie", "cache", "rustls-backend", "acme"]
+# default = ["http3-quinn", "sticky-cookie", "cache", "rustls-backend", "acme"]
 http3-quinn = ["socket2", "quinn", "h3", "h3-quinn", "rpxy-certs/http3"]
 http3-s2n = [
   "s2n-quic",
@@ -29,6 +29,7 @@ sticky-cookie = ["base64", "sha2", "chrono"]
 native-tls-backend = ["hyper-tls"]
 rustls-backend = ["hyper-rustls"]
 webpki-roots = ["rustls-backend", "hyper-rustls/webpki-tokio"]
+acme = []
 
 [dependencies]
 rand = "0.8.5"

rpxy-lib/src/globals.rs

@@ -159,4 +159,6 @@ pub struct UpstreamUri {
 pub struct TlsConfig {
   pub mutual_tls: bool,
   pub https_redirection: bool,
+  #[cfg(feature = "acme")]
+  pub acme: bool,
 }