adding self-healing function for User::sign, working only while passphrase is saved not encrypted

src/cpp/model/User.cpp

@@ -1111,9 +1111,22 @@ MemoryBin* User::sign(const unsigned char* message, size_t messageSize)
 			}
 		}
 		if (correctPassphraseFound) {
+			
+			// save corrected key into db
+			auto encyrptedPrivKey = encrypt(privKey);
+			auto newUser = controller::User::create();
+			if (1 == newUser->load(mDBId)) {
+				auto userModel = newUser->getModel();
+				userModel->setPrivateKey(encyrptedPrivKey);
+				userModel->updatePrivkey();
+				
+				mm->releaseMemory(encyrptedPrivKey);
+				
+			}
+			
+			// sign with received key
 			auto const_privKey = keys.getPrivateKey();
 			auto signBinBuffer = mm->getFreeMemory(crypto_sign_BYTES);
-
 			unsigned long long actualSignLength = 0;
 
 			if (crypto_sign_detached(*signBinBuffer, &actualSignLength, message, messageSize, *const_privKey)) {

src/cpp/model/table/User.cpp

@@ -140,6 +140,7 @@ namespace model {
 			return select;
 		}
 
+
 		/*
 		std::string mEmail;
 		std::string mFirstName;

src/cpp/model/table/User.h

@@ -41,6 +41,9 @@ namespace model {
 			const char* getTableName() const { return "users"; }
 			std::string toString();
 			std::string toHTMLString();
+
+			// specific db operation
+			inline size_t updatePrivkey() { lock(); auto result = updateIntoDB("privkey", mPrivateKey); unlock(); return result; }
 			
 
 			// default getter unlocked