/*************************************************************************/
/*  crypto_mbedtls.h                                                     */
/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
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#ifndef CRYPTO_MBEDTLS_H
#define CRYPTO_MBEDTLS_H

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

#include <mbedtls/ctr_drbg.h>
#include <mbedtls/entropy.h>
#include <mbedtls/ssl.h>

class CryptoMbedTLS;
class SSLContextMbedTLS;
class CryptoKeyMbedTLS : public CryptoKey {

private:
	mbedtls_pk_context pkey;
	int locks;

public:
	static CryptoKey *create();
	static void make_default() { CryptoKey::_create = create; }
	static void finalize() { CryptoKey::_create = nullptr; }

	virtual Error load(String p_path);
	virtual Error save(String p_path);

	CryptoKeyMbedTLS() {
		mbedtls_pk_init(&pkey);
		locks = 0;
	}
	~CryptoKeyMbedTLS() {
		mbedtls_pk_free(&pkey);
	}

	_FORCE_INLINE_ void lock() { locks++; }
	_FORCE_INLINE_ void unlock() { locks--; }

	friend class CryptoMbedTLS;
	friend class SSLContextMbedTLS;
};

class X509CertificateMbedTLS : public X509Certificate {

private:
	mbedtls_x509_crt cert;
	int locks;

public:
	static X509Certificate *create();
	static void make_default() { X509Certificate::_create = create; }
	static void finalize() { X509Certificate::_create = nullptr; }

	virtual Error load(String p_path);
	virtual Error load_from_memory(const uint8_t *p_buffer, int p_len);
	virtual Error save(String p_path);

	X509CertificateMbedTLS() {
		mbedtls_x509_crt_init(&cert);
		locks = 0;
	}
	~X509CertificateMbedTLS() {
		mbedtls_x509_crt_free(&cert);
	}

	_FORCE_INLINE_ void lock() { locks++; }
	_FORCE_INLINE_ void unlock() { locks--; }

	friend class CryptoMbedTLS;
	friend class SSLContextMbedTLS;
};

class CryptoMbedTLS : public Crypto {

private:
	mbedtls_entropy_context entropy;
	mbedtls_ctr_drbg_context ctr_drbg;
	static X509CertificateMbedTLS *default_certs;

public:
	static Crypto *create();
	static void initialize_crypto();
	static void finalize_crypto();
	static X509CertificateMbedTLS *get_default_certificates();
	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);

	CryptoMbedTLS();
	~CryptoMbedTLS();
};

#endif // CRYPTO_MBEDTLS_H