Merge pull request #247 from skalenetwork/enhancement/SKALE-3636-SGX-Server-anti-DOS-protections

Enhancement/skale 3636 sgx server anti dos protections

Log.h

@@ -74,6 +74,16 @@ public:
     static void handleSGXException(Json::Value &_result, SGXException &_e);
 };
 
+
+#define COUNT_STATISTICS \
+static uint64_t __COUNT__ = 0; \
+__COUNT__++; \
+if (__COUNT__ % 1000 == 0) { \
+spdlog::info(string(__FUNCTION__) +  " processed " + to_string(__COUNT__) + " requests"); \
+}
+
+
+
 #define INIT_RESULT(__RESULT__)     Json::Value __RESULT__; \
               int errStatus = UNKNOWN_ERROR; boost::ignore_unused(errStatus); string errMsg(BUF_LEN, '\0');__RESULT__["status"] = UNKNOWN_ERROR; __RESULT__["errorMessage"] = \
 "Server error. Please see server log.";

SGXWalletServer.hpp

@@ -38,6 +38,17 @@ using namespace std;
 class SGXWalletServer : public AbstractStubServer {
     static shared_ptr<SGXWalletServer> server;
     static shared_ptr<HttpServer> httpServer;
+
+    static map<string,string> blsRequests;
+    static recursive_mutex blsRequestsLock;
+    static map<string,string> ecdsaRequests;
+    static recursive_mutex ecdsaRequestsLock;
+
+
+
+    static void checkForDuplicate(map <string, string> &_map, recursive_mutex &_m, const string &_key,
+    const string &_value);
+
 public:
     static const char* getVersion() {
         return TOSTRING(SGXWALLET_VERSION);

common.h

@@ -107,6 +107,7 @@ extern uint64_t initTime;
 #define ENCLAVE_RESTART_PERIOD_S 60 * 10
 #endif
 
+#define LOCK(__X__) std::lock_guard<std::recursive_mutex> __LOCK__(__X__);
 #define READ_LOCK(__X__) std::shared_lock<std::shared_timed_mutex> __LOCK__(__X__);
 #define WRITE_LOCK(__X__) std::unique_lock<std::shared_timed_mutex> __LOCK__(__X__);