fix(replication): reject unsupported target options (#5622)

crates/ecstore/src/bucket/target/bucket_target.rs

@@ -530,6 +530,47 @@ mod tests {
         assert!(redacted_json.contains(r#""session_token":null"#));
     }
 
+    #[test]
+    fn historical_bucket_target_options_remain_readable() {
+        let target: BucketTarget = serde_json::from_value(serde_json::json!({
+            "endpoint": "legacy.example:9000",
+            "credentials": {
+                "accessKey": "legacy-access",
+                "secretKey": "legacy-secret",
+                "session_token": "legacy-session-token",
+                "expiration": "2024-12-31T23:59:59Z"
+            },
+            "targetbucket": "legacy-bucket",
+            "api": "s3v2",
+            "healthCheckDuration": 30,
+            "disableProxy": true,
+            "edge": true,
+            "edgeSyncBeforeExpiry": true,
+            "type": "replication"
+        }))
+        .expect("historical remote target should remain readable");
+
+        assert_eq!(target.api, "s3v2");
+        assert_eq!(target.health_check_duration, Duration::from_secs(30));
+        assert!(target.disable_proxy);
+        assert!(target.edge);
+        assert!(target.edge_sync_before_expiry);
+        assert_eq!(
+            target
+                .credentials
+                .as_ref()
+                .and_then(|credentials| credentials.session_token.as_deref()),
+            Some("legacy-session-token")
+        );
+        assert!(
+            target
+                .credentials
+                .as_ref()
+                .and_then(|credentials| credentials.expiration)
+                .is_some()
+        );
+    }
+
     #[test]
     fn test_bucket_target_type_json_deserialize() {
         // Test BucketTargetType JSON deserialization

rustfs/src/admin/handlers/replication.rs

@@ -50,6 +50,8 @@ use time::OffsetDateTime;
 use tracing::{debug, error, info, warn};
 use url::Host;
 
+const SUPPORTED_REMOTE_TARGET_API: &str = "s3v4";
+
 fn extract_query_params(uri: &Uri) -> HashMap<String, String> {
     let mut params = HashMap::new();
 
@@ -78,7 +80,7 @@ fn map_bucket_target_error(err: BucketTargetError) -> S3Error {
     }
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Deserialize)]
 #[serde(deny_unknown_fields)]
 struct RemoteTargetCredentialsRequest {
     #[serde(rename = "accessKey")]
@@ -100,7 +102,7 @@ impl From<RemoteTargetCredentialsRequest> for TargetCredentials {
     }
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Deserialize)]
 #[serde(deny_unknown_fields)]
 struct RemoteTargetRequest {
     #[serde(rename = "sourcebucket", default)]
@@ -179,6 +181,32 @@ impl RemoteTargetRequest {
             return Err(s3_error!(InvalidRequest, "credentials.secretKey is required"));
         }
 
+        if self
+            .credentials
+            .session_token
+            .as_deref()
+            .is_some_and(|token| !token.trim().is_empty())
+        {
+            return Err(s3_error!(
+                InvalidRequest,
+                "remote target field credentials.session_token is not supported by this RustFS version"
+            ));
+        }
+
+        if self.credentials.expiration.is_some() {
+            return Err(s3_error!(
+                InvalidRequest,
+                "remote target field credentials.expiration is not supported by this RustFS version"
+            ));
+        }
+
+        if !self.api.is_empty() && self.api != SUPPORTED_REMOTE_TARGET_API {
+            return Err(s3_error!(
+                InvalidRequest,
+                "remote target field api value is not supported by this RustFS version"
+            ));
+        }
+
         for (unsupported, configured) in [
             ("disableProxy", self.disable_proxy),
             ("healthCheckDuration", self.health_check_duration != 0),
@@ -1021,7 +1049,7 @@ impl Operation for ReplicationMrfHandler {
 #[cfg(test)]
 mod tests {
     use super::{
-        RemoteTargetRequest, build_mrf_response, extract_query_params, unique_replication_peers,
+        RemoteTargetRequest, SUPPORTED_REMOTE_TARGET_API, build_mrf_response, extract_query_params, unique_replication_peers,
         validate_remote_target_tls_settings,
     };
     use crate::admin::storage_api::bucket::target::BucketTarget;
@@ -1276,8 +1304,10 @@ mod tests {
         let mut request = valid_remote_target_request();
         request["unexpected"] = serde_json::json!(true);
 
-        let err = serde_json::from_value::<RemoteTargetRequest>(request)
-            .expect_err("remote target request should reject unknown fields");
+        let err = match serde_json::from_value::<RemoteTargetRequest>(request) {
+            Ok(_) => panic!("remote target request should reject unknown fields"),
+            Err(err) => err,
+        };
 
         assert!(err.to_string().contains("unknown field"));
     }
@@ -1290,8 +1320,10 @@ mod tests {
             .expect("request should be an object")
             .remove("credentials");
 
-        let err =
-            serde_json::from_value::<RemoteTargetRequest>(request).expect_err("remote target request should require credentials");
+        let err = match serde_json::from_value::<RemoteTargetRequest>(request) {
+            Ok(_) => panic!("remote target request should require credentials"),
+            Err(err) => err,
+        };
 
         assert!(err.to_string().contains("missing field"));
     }
@@ -1314,13 +1346,20 @@ mod tests {
     #[test]
     fn remote_target_request_rejects_unimplemented_fields() {
         for (field, value) in [
+            ("credentials.session_token", serde_json::json!("session-token")),
+            ("credentials.expiration", serde_json::json!("2026-01-01T00:00:00Z")),
+            ("api", serde_json::json!("s3v2")),
             ("disableProxy", serde_json::json!(true)),
             ("healthCheckDuration", serde_json::json!(5)),
             ("edge", serde_json::json!(true)),
             ("edgeSyncBeforeExpiry", serde_json::json!(true)),
         ] {
             let mut request = valid_remote_target_request();
-            request[field] = value;
+            if let Some((credential_field, credential_name)) = field.split_once('.') {
+                request[credential_field][credential_name] = value;
+            } else {
+                request[field] = value;
+            }
             let request: RemoteTargetRequest =
                 serde_json::from_value(request).expect("unsupported field should still deserialize");
             let err = request
@@ -1332,6 +1371,46 @@ mod tests {
         }
     }
 
+    #[test]
+    fn remote_target_request_accepts_static_credentials_and_supported_api() {
+        let mut request = valid_remote_target_request();
+        request["api"] = serde_json::json!("s3v4");
+        request["secure"] = serde_json::json!(true);
+        request["caCertPem"] = serde_json::json!("-----BEGIN CERTIFICATE-----\nMIIB\n-----END CERTIFICATE-----\n");
+        request["credentials"]["session_token"] = serde_json::json!("");
+
+        let target = serde_json::from_value::<RemoteTargetRequest>(request)
+            .expect("supported remote target request should deserialize")
+            .into_bucket_target()
+            .expect("static credentials, SigV4 and custom CA should remain supported");
+
+        assert_eq!(target.api, SUPPORTED_REMOTE_TARGET_API);
+        assert_eq!(
+            target
+                .credentials
+                .as_ref()
+                .and_then(|credentials| credentials.session_token.as_deref()),
+            Some("")
+        );
+        assert!(!target.ca_cert_pem.is_empty());
+    }
+
+    #[test]
+    fn remote_target_request_validation_does_not_echo_credential_values() {
+        let mut request = valid_remote_target_request();
+        request["credentials"]["session_token"] = serde_json::json!("session-token-must-not-leak");
+
+        let request: RemoteTargetRequest = serde_json::from_value(request).expect("request should deserialize");
+        let err = request
+            .into_bucket_target()
+            .expect_err("session tokens must be rejected before persistence");
+        let message = err.to_string();
+
+        assert!(message.contains("credentials.session_token"));
+        assert!(!message.contains("session-token-must-not-leak"));
+        assert!(!message.contains("secret"));
+    }
+
     #[test]
     fn remote_target_request_converts_to_bucket_target() {
         let target = serde_json::from_value::<RemoteTargetRequest>(valid_remote_target_request())