feat: added project files

ncmcrypt.h

@@ -0,0 +1,69 @@
+#pragma once
+
+#include "aes.h"
+#include "cJSON.h"
+
+#include <iostream>
+#include <fstream>
+
+class NeteaseMusicMetadata {
+
+private:
+	std::string mAlbum;
+	std::string mArtist;
+	std::string mFormat;
+	std::string mName;
+	int mDuration;
+	int mBitrate;
+
+private:
+	cJSON* mRaw;
+
+public:
+	NeteaseMusicMetadata(cJSON*);
+	~NeteaseMusicMetadata();
+    const std::string& name() const { return mName; }
+    const std::string& album() const { return mAlbum; }
+    const std::string& artist() const { return mArtist; }
+    const std::string& format() const { return mFormat; }
+    const int duration() const { return mDuration; }
+    const int bitrate() const { return mBitrate; }
+
+};
+
+class NeteaseCrypt {
+
+private:
+	static const unsigned char sCoreKey[17];
+	static const unsigned char sModifyKey[17];
+	static const unsigned char mPng[8];
+	enum NcmFormat { MP3, FLAC };
+
+private:
+	std::string mFilepath;
+	std::string mDumpFilepath;
+	NcmFormat mFormat;
+	std::string mImageData;
+	std::ifstream mFile;
+	unsigned char mKeyBox[256];
+	NeteaseMusicMetadata* mMetaData;
+
+private:
+	bool isNcmFile();
+	bool openFile(std::string const&);
+	int read(char *s, std::streamsize n);
+	void buildKeyBox(unsigned char *key, int keyLen);
+	std::string mimeType(std::string& data);
+
+public:
+	const std::string& filepath() const { return mFilepath; }
+	const std::string& dumpFilepath() const { return mDumpFilepath; }
+
+public:
+	NeteaseCrypt(std::string const&);
+	~NeteaseCrypt();
+
+public:
+	void Dump();
+	void FixMetadata();
+};