Add xorstring for compile-time string obfuscation

src/xorstring.h

@@ -0,0 +1,87 @@
+#pragma once
+// https://stackoverflow.com/questions/7270473/compile-time-string-encryption
+//-------------------------------------------------------------//
+// "Malware related compile-time hacks with C++11" by LeFF   //
+// You can use this code however you like, I just don't really //
+// give a shit, but if you feel some respect for me, please //
+// don't cut off this comment when copy-pasting... ;-)       //
+//-------------------------------------------------------------//
+
+////////////////////////////////////////////////////////////////////
+template <int X> struct EnsureCompileTime {
+    enum : int {
+        Value = X
+    };
+};
+////////////////////////////////////////////////////////////////////
+
+
+////////////////////////////////////////////////////////////////////
+//Use Compile-Time as seed
+#define Seed ((__TIME__[7] - '0') * 1  + (__TIME__[6] - '0') * 10  + \
+              (__TIME__[4] - '0') * 60   + (__TIME__[3] - '0') * 600 + \
+              (__TIME__[1] - '0') * 3600 + (__TIME__[0] - '0') * 36000)
+////////////////////////////////////////////////////////////////////
+
+
+////////////////////////////////////////////////////////////////////
+constexpr int LinearCongruentGenerator(int Rounds) {
+    return 1013904223 + 1664525 * ((Rounds> 0) ? LinearCongruentGenerator(Rounds - 1) : Seed & 0xFFFFFFFF);
+}
+#define Random() EnsureCompileTime<LinearCongruentGenerator(10)>::Value //10 Rounds
+#define RandomNumber(Min, Max) (Min + (Random() % (Max - Min + 1)))
+////////////////////////////////////////////////////////////////////
+
+
+////////////////////////////////////////////////////////////////////
+template <int... Pack> struct IndexList {};
+////////////////////////////////////////////////////////////////////
+
+
+////////////////////////////////////////////////////////////////////
+template <typename IndexList, int Right> struct Append;
+template <int... Left, int Right> struct Append<IndexList<Left...>, Right> {
+    typedef IndexList<Left..., Right> Result;
+};
+////////////////////////////////////////////////////////////////////
+
+
+////////////////////////////////////////////////////////////////////
+template <int N> struct ConstructIndexList {
+    typedef typename Append<typename ConstructIndexList<N - 1>::Result, N - 1>::Result Result;
+};
+template <> struct ConstructIndexList<0> {
+    typedef IndexList<> Result;
+};
+////////////////////////////////////////////////////////////////////
+
+
+////////////////////////////////////////////////////////////////////
+const char XORKEY = static_cast<char>(RandomNumber(0, 0xFF));
+constexpr char EncryptCharacter(const char Character, int Index) {
+    return Character ^ (XORKEY + Index);
+}
+
+template <typename IndexList> class CXorString;
+template <int... Index> class CXorString<IndexList<Index...> > {
+private:
+    char Value[sizeof...(Index) + 1];
+public:
+    constexpr CXorString(const char* const String)
+    : Value{ EncryptCharacter(String[Index], Index)... } {}
+
+    char* decrypt() {
+        for(unsigned t = 0; t < sizeof...(Index); t++) {
+            Value[t] = Value[t] ^ (XORKEY + t);
+        }
+        Value[sizeof...(Index)] = '\0';
+        return Value;
+    }
+
+    char* get() {
+        return Value;
+    }
+};
+#define XorS(X, String) CXorString<ConstructIndexList<sizeof(String)-1>::Result> X(String)
+#define XorString( String ) ( CXorString<ConstructIndexList<sizeof( String ) - 1>::Result>( String ).decrypt() )
+////////////////////////////////////////////////////////////////////