Issue 5146 - Implement DownloadableSubscription parsing in C++

compiled/Md5.h

+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-present eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+class String;
+
+class MD5
+{
+  uint32_t lo, hi;
+  uint32_t a, b, c, d;
+  unsigned char buffer[64];
+  uint32_t block[16];
+
+  void InitState();
+  const void* Body(const void* data, unsigned long size);
+public:
+  constexpr static size_t CHECKSUM_LENGTH = 16;
+
+  MD5();
+  void Update(const void*, size_t);
+  void Update(const String& input);
+  void Final(uint8_t* result);
+};
+