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