fc-common: allow configuring url schemes to allow for testing

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I99912d7c45f1a4664d4823ddd793b5af6a6a6964

crates/common/src/config.rs

@@ -47,6 +47,9 @@ pub struct ServerConfig {
   pub cors_permissive:     bool,
   pub rate_limit_rps:      Option<u64>,
   pub rate_limit_burst:    Option<u32>,
+  /// Allowed URL schemes for repository URLs. Insecure schemes emit a warning
+  /// on startup
+  pub allowed_url_schemes: Vec<String>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -481,6 +484,12 @@ impl Default for ServerConfig {
       cors_permissive:     false,
       rate_limit_rps:      None,
       rate_limit_burst:    None,
+      allowed_url_schemes: vec![
+        "https".into(),
+        "http".into(),
+        "git".into(),
+        "ssh".into(),
+      ],
     }
   }
 }

crates/common/src/validate.rs

@@ -30,8 +30,9 @@ static COMMIT_HASH_RE: LazyLock<Regex> =
 static SYSTEM_RE: LazyLock<Regex> =
   LazyLock::new(|| Regex::new(r"^\w+-\w+$").unwrap());
 
-const VALID_REPO_PREFIXES: &[&str] =
-  &["https://", "http://", "git://", "ssh://", "file://"];
+/// Schemes considered insecure for repository URLs.
+const INSECURE_SCHEMES: &[&str] = &["file", "http"];
+
 const VALID_FORGE_TYPES: &[&str] = &["github", "gitea", "forgejo", "gitlab"];
 
 /// Known internal/metadata IP ranges and hostnames to block for SSRF
@@ -61,7 +62,7 @@ fn extract_host_from_url(url: &str) -> Option<String> {
 
 /// Check if a hostname is internal/metadata (SSRF targets).
 fn is_internal_host(host: &str) -> bool {
-  if INTERNAL_HOSTS.iter().any(|&h| host == h) {
+  if INTERNAL_HOSTS.contains(&host) {
     return true;
   }
   // Block localhost variants
@@ -121,17 +122,9 @@ fn validate_repository_url(url: &str) -> Result<(), String> {
   if url.len() > 2048 {
     return Err("repository_url must be at most 2048 characters".to_string());
   }
-  if !VALID_REPO_PREFIXES.iter().any(|p| url.starts_with(p)) {
+  if !url.contains("://") {
     return Err(
-      "repository_url must start with https://, http://, git://, ssh://, or \
-       file://"
-        .to_string(),
-    );
-  }
-  // Reject file:// URLs for SSRF protection (local filesystem access)
-  if url.starts_with("file://") {
-    return Err(
-      "repository_url must not use file:// scheme for security reasons"
+      "repository_url must contain a valid URL scheme (e.g. https://)"
         .to_string(),
     );
   }
@@ -147,6 +140,46 @@ fn validate_repository_url(url: &str) -> Result<(), String> {
   Ok(())
 }
 
+/// Validate that a URL uses one of the allowed schemes.
+/// Logs a warning when insecure schemes (`file`, `http`) are used.
+pub fn validate_url_scheme(
+  url: &str,
+  allowed_schemes: &[String],
+) -> Result<(), String> {
+  let scheme = url.split("://").next().unwrap_or("");
+  if !allowed_schemes.iter().any(|s| s == scheme) {
+    return Err(format!(
+      "repository_url scheme '{scheme}://' is not allowed. Allowed schemes: {}",
+      allowed_schemes
+        .iter()
+        .map(|s| format!("{s}://"))
+        .collect::<Vec<_>>()
+        .join(", ")
+    ));
+  }
+  if INSECURE_SCHEMES.contains(&scheme) {
+    tracing::warn!(
+      url = url,
+      scheme = scheme,
+      "Repository URL uses insecure scheme"
+    );
+  }
+  Ok(())
+}
+
+/// Log warnings at startup for any insecure schemes in the allowed list.
+pub fn warn_insecure_schemes(allowed_schemes: &[String]) {
+  for scheme in allowed_schemes {
+    if INSECURE_SCHEMES.contains(&scheme.as_str()) {
+      tracing::warn!(
+        scheme = scheme.as_str(),
+        "Insecure URL scheme '{scheme}://' is enabled in \
+         server.allowed_url_schemes"
+      );
+    }
+  }
+}
+
 fn validate_description(desc: &str) -> Result<(), String> {
   if desc.len() > 4096 {
     return Err("description must be at most 4096 characters".to_string());
@@ -544,10 +577,11 @@ mod tests {
 
   #[test]
   fn test_create_project_invalid_url() {
+    // URL without scheme separator is rejected structurally
     let p = CreateProject {
       name:           "valid-name".to_string(),
       description:    None,
-      repository_url: "ftp://example.com".to_string(),
+      repository_url: "not-a-url".to_string(),
     };
     assert!(p.validate().is_err());
   }
@@ -741,8 +775,39 @@ mod tests {
   }
 
   #[test]
-  fn test_repository_url_rejects_file_scheme() {
-    assert!(validate_repository_url("file:///etc/passwd").is_err());
+  fn test_validate_url_scheme_rejects_file_by_default() {
+    let default_schemes: Vec<String> = vec!["https", "http", "git", "ssh"]
+      .into_iter()
+      .map(Into::into)
+      .collect();
+    assert!(
+      validate_url_scheme("file:///etc/passwd", &default_schemes).is_err()
+    );
+  }
+
+  #[test]
+  fn test_validate_url_scheme_allows_file_when_configured() {
+    let schemes: Vec<String> = vec!["https", "http", "git", "ssh", "file"]
+      .into_iter()
+      .map(Into::into)
+      .collect();
+    assert!(validate_url_scheme("file:///var/lib/repo.git", &schemes).is_ok());
+  }
+
+  #[test]
+  fn test_validate_url_scheme_rejects_unknown() {
+    let schemes: Vec<String> =
+      vec!["https", "ssh"].into_iter().map(Into::into).collect();
+    assert!(
+      validate_url_scheme("ftp://example.com/repo.git", &schemes).is_err()
+    );
+  }
+
+  #[test]
+  fn test_repository_url_accepts_file_structurally() {
+    // validate_repository_url no longer checks schemes (that's
+    // validate_url_scheme's job)
+    assert!(validate_repository_url("file:///etc/passwd").is_ok());
   }
 
   #[test]

crates/server/src/main.rs

@@ -51,6 +51,10 @@ async fn main() -> anyhow::Result<()> {
   let host = cli.host.unwrap_or(config.server.host.clone());
   let port = cli.port.unwrap_or(config.server.port);
 
+  fc_common::validate::warn_insecure_schemes(
+    &config.server.allowed_url_schemes,
+  );
+
   let db = Database::new(config.database.clone()).await?;
 
   // Bootstrap declarative projects, jobsets, and API keys from config

crates/server/src/routes/projects.rs

@@ -62,6 +62,11 @@ async fn create_project(
   input
     .validate()
     .map_err(|msg| ApiError(fc_common::CiError::Validation(msg)))?;
+  fc_common::validate::validate_url_scheme(
+    &input.repository_url,
+    &state.config.server.allowed_url_schemes,
+  )
+  .map_err(|msg| ApiError(fc_common::CiError::Validation(msg)))?;
   let project = fc_common::repo::projects::create(&state.pool, input)
     .await
     .map_err(ApiError)?;
@@ -87,6 +92,13 @@ async fn update_project(
   input
     .validate()
     .map_err(|msg| ApiError(fc_common::CiError::Validation(msg)))?;
+  if let Some(ref url) = input.repository_url {
+    fc_common::validate::validate_url_scheme(
+      url,
+      &state.config.server.allowed_url_schemes,
+    )
+    .map_err(|msg| ApiError(fc_common::CiError::Validation(msg)))?;
+  }
   let project = fc_common::repo::projects::update(&state.pool, id, input)
     .await
     .map_err(ApiError)?;
@@ -231,6 +243,11 @@ async fn setup_project(
   create_project
     .validate()
     .map_err(|msg| ApiError(fc_common::CiError::Validation(msg)))?;
+  fc_common::validate::validate_url_scheme(
+    &create_project.repository_url,
+    &state.config.server.allowed_url_schemes,
+  )
+  .map_err(|msg| ApiError(fc_common::CiError::Validation(msg)))?;
 
   let project = fc_common::repo::projects::create(&state.pool, create_project)
     .await