/*************************************************************************/ /* file_access_encrypted.h */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ #ifndef FILE_ACCESS_ENCRYPTED_H #define FILE_ACCESS_ENCRYPTED_H #include "core/io/file_access.h" #define ENCRYPTED_HEADER_MAGIC 0x43454447 class FileAccessEncrypted : public FileAccess { public: enum Mode { MODE_READ, MODE_WRITE_AES256, MODE_MAX }; private: Vector<uint8_t> key; bool writing = false; FileAccess *file = nullptr; uint64_t base = 0; uint64_t length = 0; Vector<uint8_t> data; mutable uint64_t pos = 0; mutable bool eofed = false; bool use_magic = true; void _release(); public: Error open_and_parse(FileAccess *p_base, const Vector<uint8_t> &p_key, Mode p_mode, bool p_with_magic = true); Error open_and_parse_password(FileAccess *p_base, const String &p_key, Mode p_mode); virtual Error _open(const String &p_path, int p_mode_flags); ///< open a file virtual void close(); ///< close a file virtual void release(); ///< finish and keep base file open virtual bool is_open() const; ///< true when file is open virtual String get_path() const; /// returns the path for the current open file virtual String get_path_absolute() const; /// returns the absolute path for the current open file virtual void seek(uint64_t p_position); ///< seek to a given position virtual void seek_end(int64_t p_position = 0); ///< seek from the end of file virtual uint64_t get_position() const; ///< get position in the file virtual uint64_t get_length() const; ///< get size of the file virtual bool eof_reached() const; ///< reading passed EOF virtual uint8_t get_8() const; ///< get a byte virtual uint64_t get_buffer(uint8_t *p_dst, uint64_t p_length) const; virtual Error get_error() const; ///< get last error virtual void flush(); virtual void store_8(uint8_t p_dest); ///< store a byte virtual void store_buffer(const uint8_t *p_src, uint64_t p_length); ///< store an array of bytes virtual bool file_exists(const String &p_name); ///< return true if a file exists virtual uint64_t _get_modified_time(const String &p_file); virtual uint32_t _get_unix_permissions(const String &p_file); virtual Error _set_unix_permissions(const String &p_file, uint32_t p_permissions); FileAccessEncrypted() {} ~FileAccessEncrypted(); }; #endif // FILE_ACCESS_ENCRYPTED_H