Add federation.onion_proxy_url configuration parameter

CHANGELOG.md

@@ -15,6 +15,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Support audio attachments.
 - Added CLI command for viewing unreachable actors.
 - Implemented NodeInfo 2.1.
+- Added `federation.onion_proxy_url` configuration parameter (enables proxy for requests to `.onion` domains).
 
 ### Changed
 

contrib/mitra_config.yaml

@@ -47,6 +47,8 @@ retention:
 #federation:
 #  # Proxy for outgoing requests
 #  #proxy_url: 'socks5h://127.0.0.1:9050'
+#  # Proxy for outgoing requests to .onion targets
+#  #onion_proxy_url: 'socks5h://127.0.0.1:9050'
 
 # List of blocked domains
 #blocked_instances: []

mitra-config/src/config.rs

@@ -99,6 +99,7 @@ impl Config {
             _url: self.try_instance_url().unwrap(),
             actor_key: self.instance_rsa_key.clone().unwrap(),
             proxy_url: self.federation.proxy_url.clone(),
+            onion_proxy_url: self.federation.onion_proxy_url.clone(),
             is_private: matches!(self.environment, Environment::Development),
         }
     }
@@ -131,6 +132,7 @@ pub struct Instance {
     pub actor_key: RsaPrivateKey,
     // Proxy for outgoing requests
     pub proxy_url: Option<String>,
+    pub onion_proxy_url: Option<String>,
     // Private instance won't send signed HTTP requests
     pub is_private: bool,
 }
@@ -161,6 +163,7 @@ impl Instance {
             _url: Url::parse(url).unwrap(),
             actor_key: generate_weak_rsa_key().unwrap(),
             proxy_url: None,
+            onion_proxy_url: None,
             is_private: true,
         }
     }
@@ -179,6 +182,7 @@ mod tests {
             _url: instance_url,
             actor_key: instance_rsa_key,
             proxy_url: None,
+            onion_proxy_url: None,
             is_private: true,
         };
 
@@ -198,6 +202,7 @@ mod tests {
             _url: instance_url,
             actor_key: instance_rsa_key,
             proxy_url: None,
+            onion_proxy_url: None,
             is_private: true,
         };
 

mitra-config/src/federation.rs

@@ -3,4 +3,5 @@ use serde::Deserialize;
 #[derive(Clone, Default, Deserialize)]
 pub struct FederationConfig {
     pub proxy_url: Option<String>,
+    pub onion_proxy_url: Option<String>,
 }

src/activitypub/deliverer.rs

@@ -7,7 +7,10 @@ use serde::{Deserialize, Serialize};
 use serde_json::Value;
 
 use mitra_config::Instance;
-use mitra_utils::crypto_rsa::deserialize_private_key;
+use mitra_utils::{
+    crypto_rsa::deserialize_private_key,
+    urls::get_hostname,
+};
 
 use crate::database::{
     DatabaseClient,
@@ -47,18 +50,28 @@ pub enum DelivererError {
     #[error("activity serialization error")]
     SerializationError(#[from] serde_json::Error),
 
+    #[error("inavlid URL")]
+    UrlError(#[from] url::ParseError),
+
     #[error(transparent)]
     RequestError(#[from] reqwest::Error),
 
     #[error("http error {0:?}")]
     HttpError(reqwest::StatusCode),
-
-    #[error(transparent)]
-    DatabaseError(#[from] DatabaseError),
 }
 
-fn build_client(instance: &Instance) -> reqwest::Result<Client> {
-    build_federation_client(instance, DELIVERER_TIMEOUT)
+fn build_client(
+    instance: &Instance,
+    request_uri: &str,
+) -> Result<Client, DelivererError> {
+    let hostname = get_hostname(request_uri)?;
+    let is_onion = hostname.ends_with(".onion");
+    let client = build_federation_client(
+        instance,
+        is_onion,
+        DELIVERER_TIMEOUT,
+    )?;
+    Ok(client)
 }
 
 async fn send_activity(
@@ -76,7 +89,7 @@ async fn send_activity(
         actor_key_id,
     )?;
 
-    let client = build_client(instance)?;
+    let client = build_client(instance, inbox_url)?;
     let request = client.post(inbox_url)
         .header("Host", headers.host)
         .header("Date", headers.date)

src/activitypub/fetcher/fetchers.rs

@@ -6,7 +6,7 @@ use serde_json::Value;
 use mitra_config::Instance;
 use mitra_utils::{
     files::sniff_media_type,
-    urls::guess_protocol,
+    urls::{get_hostname, guess_protocol},
 };
 
 use crate::activitypub::{
@@ -31,6 +31,9 @@ pub enum FetchError {
     #[error(transparent)]
     SignatureError(#[from] HttpSignatureError),
 
+    #[error("inavlid URL")]
+    UrlError(#[from] url::ParseError),
+
     #[error(transparent)]
     RequestError(#[from] reqwest::Error),
 
@@ -50,8 +53,18 @@ pub enum FetchError {
     OtherError(&'static str),
 }
 
-fn build_client(instance: &Instance) -> reqwest::Result<Client> {
-    build_federation_client(instance, FETCHER_TIMEOUT)
+fn build_client(
+    instance: &Instance,
+    request_uri: &str,
+) -> Result<Client, FetchError> {
+    let hostname = get_hostname(request_uri)?;
+    let is_onion = hostname.ends_with(".onion");
+    let client = build_federation_client(
+        instance,
+        is_onion,
+        FETCHER_TIMEOUT,
+    )?;
+    Ok(client)
 }
 
 fn build_request(
@@ -75,7 +88,7 @@ async fn send_request(
     url: &str,
     query_params: &[(&str, &str)],
 ) -> Result<String, FetchError> {
-    let client = build_client(instance)?;
+    let client = build_client(instance, url)?;
     let mut request_builder = build_request(instance, client, Method::GET, url)
         .header(reqwest::header::ACCEPT, AP_MEDIA_TYPE);
 
@@ -113,7 +126,7 @@ pub async fn fetch_file(
     file_max_size: usize,
     output_dir: &Path,
 ) -> Result<(String, usize, Option<String>), FetchError> {
-    let client = build_client(instance)?;
+    let client = build_client(instance, url)?;
     let request_builder =
         build_request(instance, client, Method::GET, url);
     let response = request_builder.send().await?.error_for_status()?;
@@ -164,7 +177,7 @@ pub async fn perform_webfinger_query(
         guess_protocol(&actor_address.hostname),
         actor_address.hostname,
     );
-    let client = build_client(instance)?;
+    let client = build_client(instance, &webfinger_url)?;
     let request_builder =
         build_request(instance, client, Method::GET, &webfinger_url);
     let webfinger_data = request_builder

src/activitypub/http_client.rs

@@ -9,10 +9,16 @@ const CONNECTION_TIMEOUT: u64 = 30;
 
 pub fn build_federation_client(
     instance: &Instance,
+    is_onion: bool,
     timeout: u64,
 ) -> reqwest::Result<Client> {
     let mut client_builder = Client::builder();
-    if let Some(ref proxy_url) = instance.proxy_url {
+    let mut maybe_proxy_url = instance.proxy_url.as_ref();
+    if is_onion {
+        maybe_proxy_url = maybe_proxy_url
+            .or(instance.onion_proxy_url.as_ref());
+    };
+    if let Some(proxy_url) = maybe_proxy_url {
         let proxy = Proxy::all(proxy_url)?;
         client_builder = client_builder.proxy(proxy);
     };