feat(security): harden gateway boundaries and usage policies

Consolidate subscription usage policy enforcement, privacy-safe persistence, and gateway security hardening into one reviewable change. Includes bounded HTTP and execution envelopes, header and protocol guards, DNS and relay validation, authentication and secret projection hardening, secure backup/install paths, and regression coverage.
2026-10-09 10:57:03 +08:00 · 2026-09-04 03:45:52 +08:00
parent ddcbeb3ae9
commit 579f2c7cc1
1019 changed files with 190437 additions and 26080 deletions
@@ -8,7 +8,10 @@ use crate::ai_serving::transport::{
    GeminiFilesRequestBodyError,
 };
 use crate::ai_serving::GEMINI_FILES_UPLOAD_PLAN_KIND;
-use crate::ai_serving::{CandidateFailureDiagnostic, GatewayProviderTransportSnapshot};
+use crate::ai_serving::{
+    CandidateFailureDiagnostic, GatewayProviderTransportSnapshot, GEMINI_FILES_DELETE_PLAN_KIND,
+    GEMINI_FILES_DOWNLOAD_PLAN_KIND, GEMINI_FILES_GET_PLAN_KIND,
+};
 use crate::AppState;

 use super::support::{
@@ -47,6 +50,26 @@ pub(super) async fn resolve_local_gemini_files_candidate_payload_parts(
    let transport = &attempt.eligible.transport;
    let effective_headers = input.effective_headers(&parts.headers);

+    if matches!(
+        spec_metadata.decision_kind,
+        GEMINI_FILES_GET_PLAN_KIND
+            | GEMINI_FILES_DELETE_PLAN_KIND
+            | GEMINI_FILES_DOWNLOAD_PLAN_KIND
+    ) && !candidate_matches_owned_gemini_file_mapping(state, parts, input, attempt).await
+    {
+        mark_skipped_local_gemini_files_candidate(
+            state,
+            input,
+            trace_id,
+            candidate,
+            attempt.candidate_index,
+            &attempt.candidate_id,
+            "gemini_file_mapping_mismatch",
+        )
+        .await;
+        return None;
+    }
+
    if let Some(skip_reason) =
        gemini_files_transport_unsupported_reason(transport, GEMINI_FILES_CANDIDATE_API_FORMAT)
    {
@@ -191,3 +214,64 @@ pub(super) async fn resolve_local_gemini_files_candidate_payload_parts(
        file_name,
    })
 }
+
+async fn candidate_matches_owned_gemini_file_mapping(
+    state: &AppState,
+    parts: &http::request::Parts,
+    input: &LocalGeminiFilesDecisionInput,
+    attempt: &LocalGeminiFilesCandidateAttempt,
+) -> bool {
+    let Some(file_name) = normalize_gemini_file_name_from_path(parts.uri.path()) else {
+        return false;
+    };
+    let user_id = input.auth_context.user_id.trim();
+    if user_id.is_empty() || !state.has_gemini_file_mapping_data_reader() {
+        return false;
+    }
+    let Ok(Some(mapping)) = state
+        .find_active_gemini_file_mapping_for_owner(
+            file_name.as_str(),
+            &attempt.eligible.transport.key.id,
+            user_id,
+            crate::clock::current_unix_secs(),
+        )
+        .await
+    else {
+        return false;
+    };
+
+    mapping.user_id.as_deref().map(str::trim) == Some(user_id)
+        && mapping.key_id == attempt.eligible.transport.key.id
+}
+
+pub(crate) fn normalize_gemini_file_name_from_path(path: &str) -> Option<String> {
+    let suffix = path.strip_prefix("/v1beta/files/")?.trim_matches('/');
+    let suffix = suffix.strip_suffix(":download").unwrap_or(suffix).trim();
+    let suffix = suffix.strip_prefix("files/").unwrap_or(suffix).trim();
+    if suffix.is_empty() || suffix.contains('/') {
+        return None;
+    }
+    Some(format!("files/{suffix}"))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::normalize_gemini_file_name_from_path;
+
+    #[test]
+    fn normalizes_supported_gemini_file_object_paths() {
+        assert_eq!(
+            normalize_gemini_file_name_from_path("/v1beta/files/file-123"),
+            Some("files/file-123".to_string())
+        );
+        assert_eq!(
+            normalize_gemini_file_name_from_path("/v1beta/files/file-123:download"),
+            Some("files/file-123".to_string())
+        );
+        assert_eq!(
+            normalize_gemini_file_name_from_path("/v1beta/files/files/abc-123"),
+            Some("files/abc-123".to_string())
+        );
+        assert_eq!(normalize_gemini_file_name_from_path("/v1beta/files"), None);
+    }
+}