/*************************************************************************/
/*  crypto.h                                                             */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
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/*************************************************************************/

#ifndef CRYPTO_H
#define CRYPTO_H

#include "core/reference.h"
#include "core/resource.h"

#include "core/io/resource_loader.h"
#include "core/io/resource_saver.h"

class CryptoKey : public Resource {
	GDCLASS(CryptoKey, Resource);

protected:
	static void _bind_methods();
	static CryptoKey *(*_create)();

public:
	static CryptoKey *create();
	virtual Error load(String p_path) = 0;
	virtual Error save(String p_path) = 0;
};

class X509Certificate : public Resource {
	GDCLASS(X509Certificate, Resource);

protected:
	static void _bind_methods();
	static X509Certificate *(*_create)();

public:
	static X509Certificate *create();
	virtual Error load(String p_path) = 0;
	virtual Error load_from_memory(const uint8_t *p_buffer, int p_len) = 0;
	virtual Error save(String p_path) = 0;
};

class Crypto : public Reference {
	GDCLASS(Crypto, Reference);

protected:
	static void _bind_methods();
	static Crypto *(*_create)();
	static void (*_load_default_certificates)(String p_path);

public:
	static Crypto *create();
	static void load_default_certificates(String p_path);

	virtual PackedByteArray generate_random_bytes(int p_bytes);
	virtual Ref<CryptoKey> generate_rsa(int p_bytes);
	virtual Ref<X509Certificate> generate_self_signed_certificate(Ref<CryptoKey> p_key, String p_issuer_name, String p_not_before, String p_not_after);

	Crypto();
};

class ResourceFormatLoaderCrypto : public ResourceFormatLoader {
	GDCLASS(ResourceFormatLoaderCrypto, ResourceFormatLoader);

public:
	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = nullptr, bool p_use_sub_threads = false, float *r_progress = nullptr);
	virtual void get_recognized_extensions(List<String> *p_extensions) const;
	virtual bool handles_type(const String &p_type) const;
	virtual String get_resource_type(const String &p_path) const;
};

class ResourceFormatSaverCrypto : public ResourceFormatSaver {
	GDCLASS(ResourceFormatSaverCrypto, ResourceFormatSaver);

public:
	virtual Error save(const String &p_path, const RES &p_resource, uint32_t p_flags = 0);
	virtual void get_recognized_extensions(const RES &p_resource, List<String> *p_extensions) const;
	virtual bool recognize(const RES &p_resource) const;
};

#endif // CRYPTO_H