test: Add 4 and update 6 files

src/server.cpp

@@ -18,6 +18,7 @@
 #include "utils.hpp"
 #include "welcome_page.hpp"
 #include "rate_limiter.hpp"
+#include "validation.hpp"
 #include "HttpController.hpp"
 #include "bcrypt.hpp" // For secure token hashing
 
@@ -415,6 +416,18 @@ void Server::handle_delete_object(const drogon::HttpRequestPtr& req, std::functi
             return;
         }
 
+        // Validate hash format
+        auto hashValidation = InputValidator::validateHash(params["hash"]);
+        if (!hashValidation.valid) {
+            resp->setStatusCode(drogon::k400BadRequest);
+            nlohmann::json response = {{"result", "error"}, {"error", "Invalid hash: " + hashValidation.error}};
+            resp->setBody(response.dump());
+            resp->setContentTypeCode(drogon::CT_APPLICATION_JSON);
+            add_security_headers(resp);
+            callback(resp);
+            return;
+        }
+
         if (!db_->get(params["hash"], entry)) {
             resp->setStatusCode(drogon::k404NotFound);
             nlohmann::json response = {{"result", "error"}, {"error", "Object not found for: " + params["hash"]}};