/*************************************************************************/
/*  stream_peer_openssl.h                                                */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
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/*************************************************************************/

#ifndef STREAM_PEER_OPEN_SSL_H
#define STREAM_PEER_OPEN_SSL_H

#include "core/io/stream_peer_ssl.h"

#include "mbedtls/config.h"
#include "mbedtls/ctr_drbg.h"
#include "mbedtls/debug.h"
#include "mbedtls/entropy.h"
#include "mbedtls/net.h"
#include "mbedtls/ssl.h"

#include <stdio.h>
#include <stdlib.h>

class StreamPeerMbedTLS : public StreamPeerSSL {
private:
	Status status;
	String hostname;

	Ref<StreamPeer> base;

	static StreamPeerSSL *_create_func();
	static void _load_certs(const PoolByteArray &p_array);

	static int bio_recv(void *ctx, unsigned char *buf, size_t len);
	static int bio_send(void *ctx, const unsigned char *buf, size_t len);
	void _cleanup();

protected:
	static mbedtls_x509_crt cacert;

	mbedtls_entropy_context entropy;
	mbedtls_ctr_drbg_context ctr_drbg;
	mbedtls_ssl_context ssl;
	mbedtls_ssl_config conf;

	static void _bind_methods();

	Error _do_handshake();

public:
	virtual void poll();
	virtual Error accept_stream(Ref<StreamPeer> p_base);
	virtual Error connect_to_stream(Ref<StreamPeer> p_base, bool p_validate_certs = false, const String &p_for_hostname = String());
	virtual Status get_status() const;

	virtual void disconnect_from_stream();

	virtual Error put_data(const uint8_t *p_data, int p_bytes);
	virtual Error put_partial_data(const uint8_t *p_data, int p_bytes, int &r_sent);

	virtual Error get_data(uint8_t *p_buffer, int p_bytes);
	virtual Error get_partial_data(uint8_t *p_buffer, int p_bytes, int &r_received);

	virtual int get_available_bytes() const;

	static void initialize_ssl();
	static void finalize_ssl();

	StreamPeerMbedTLS();
	~StreamPeerMbedTLS();
};

#endif // STREAM_PEER_SSL_H