godot/core/io/file_access_encrypted.h
2023-02-16 15:34:20 +02:00

98 lines
4.5 KiB
C++

/**************************************************************************/
/* file_access_encrypted.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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;
Ref<FileAccess> file;
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 _close();
public:
Error open_and_parse(Ref<FileAccess> p_base, const Vector<uint8_t> &p_key, Mode p_mode, bool p_with_magic = true);
Error open_and_parse_password(Ref<FileAccess> p_base, const String &p_key, Mode p_mode);
virtual Error open_internal(const String &p_path, int p_mode_flags) override; ///< open a file
virtual bool is_open() const override; ///< true when file is open
virtual String get_path() const override; /// returns the path for the current open file
virtual String get_path_absolute() const override; /// returns the absolute path for the current open file
virtual void seek(uint64_t p_position) override; ///< seek to a given position
virtual void seek_end(int64_t p_position = 0) override; ///< seek from the end of file
virtual uint64_t get_position() const override; ///< get position in the file
virtual uint64_t get_length() const override; ///< get size of the file
virtual bool eof_reached() const override; ///< reading passed EOF
virtual uint8_t get_8() const override; ///< get a byte
virtual uint64_t get_buffer(uint8_t *p_dst, uint64_t p_length) const override;
virtual Error get_error() const override; ///< get last error
virtual void flush() override;
virtual void store_8(uint8_t p_dest) override; ///< store a byte
virtual void store_buffer(const uint8_t *p_src, uint64_t p_length) override; ///< store an array of bytes
virtual bool file_exists(const String &p_name) override; ///< return true if a file exists
virtual uint64_t _get_modified_time(const String &p_file) override;
virtual uint32_t _get_unix_permissions(const String &p_file) override;
virtual Error _set_unix_permissions(const String &p_file, uint32_t p_permissions) override;
virtual void close() override;
FileAccessEncrypted() {}
~FileAccessEncrypted();
};
#endif // FILE_ACCESS_ENCRYPTED_H