Introduce a base class for hashes

Chaos/Hashing/Hash.hpp

@@ -0,0 +1,21 @@
+#ifndef CHAOS_HASHING_HASH_HPP
+#define CHAOS_HASHING_HASH_HPP
+
+#include <string>
+
+namespace Chaos::Hashing
+{
+
+template<typename T>
+class Hash
+{
+public:
+    std::string ToHexString() const
+    {
+        return static_cast<const T &>(*this).ToHexString();
+    }
+};
+
+} // namespace Chaos::Hashing
+
+#endif

Chaos/Hashing/Md4.hpp

@@ -1,11 +1,13 @@
-#ifndef CHAOS_MD4HASHER_HPP
-#define CHAOS_MD4HASHER_HPP
+#ifndef CHAOS_HASHING_MD4HASHER_HPP
+#define CHAOS_HASHING_MD4HASHER_HPP
 
 #include <cstdint>
 #include <array>
 #include <string>
 
-namespace Chaos::Md4
+#include "Hash.hpp"
+
+namespace Chaos::Hashing::Md4
 {
 
 struct Buffer
@@ -126,7 +128,7 @@ private:
     }
 };
 
-struct Md4Hash
+struct Md4Hash : public Hash<Md4Hash>
 {
     std::string ToHexString() const
     {

Chaos/Hashing/Md5.hpp

@@ -1,11 +1,13 @@
-#ifndef CHAOS_MD5HASHER_HPP
-#define CHAOS_MD5HASHER_HPP
+#ifndef CHAOS_HASHING_MD5HASHER_HPP
+#define CHAOS_HASHING_MD5HASHER_HPP
 
 #include <cstdint>
 #include <array>
 #include <string>
 
-namespace Chaos::Md5
+#include "Hash.hpp"
+
+namespace Chaos::Hashing::Md5
 {
 
 struct Buffer
@@ -150,7 +152,7 @@ private:
     }
 };
 
-struct Md5Hash
+struct Md5Hash : public Hash<Md5Hash>
 {
     std::string ToHexString() const
     {