//+------------------------------------------------------------------+
//|                                                            H.mqh |
//|                                   Copyright 2026, Niquel Mendoza |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2026, Niquel Mendoza"
#property link      "https://www.mql5.com"
#property strict

#ifndef CRYPTOBYLEO_SRC_RSA_KEYS_H_MQH
#define CRYPTOBYLEO_SRC_RSA_KEYS_H_MQH

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
#include "..\\Def.mqh"


//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
namespace TSN
{
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
//-- tipos de padders para firmar
enum ENUM_RSA_SING_PADDER
 {
  RSA_SING_PADDER_PSS,
  RSA_SING_PADDER_PKCS1V15
 };

//---
const uchar g_rsa_oid[9] =
 {
  0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01
 };

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
class PssParams
 {
public:
                     PssParams(uchar& _salt[], const int _salt_len)
    :                salt_len(_salt_len) { ArraySwap(salt, _salt);}
                     PssParams()
    :                salt_len(0) {}
                    ~PssParams(void) {}

  //---
  int                salt_len;
  uchar              salt[];
 };



//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
class CRsaKey
 {
protected:
  //--- Parametros
  //- Desencryptado
  TSN::CCryptoHashMeta::ENUM_TSN_CRYPTO_HASH m_cip_fhash; // tipo de funcoin para el oaep fncion HASH

  //- Firmado
  ENUM_RSA_SING_PADDER m_sing_padder; // padder del firmado
  TSN::CCryptoHashMeta::ENUM_TSN_CRYPTO_HASH m_sing_fhash; // tipo de hasher para el mensaje
  PssParams*         m_sing_data; // parametros para el firmado

public:
                     CRsaKey(void);
                    ~CRsaKey(void) {}

  //--- Getter \ Setter
  //-- Sing (Firmado\Verficacion)
  // padder
  void               SingPadder(ENUM_RSA_SING_PADDER p) { m_sing_padder = p;    }
  __forceinline ENUM_RSA_SING_PADDER SingPadder() const { return m_sing_padder; }
  // fhash
  void               SingFHash(TSN::CCryptoHashMeta::ENUM_TSN_CRYPTO_HASH fhash) { m_sing_fhash = fhash; }
  __forceinline TSN::CCryptoHashMeta::ENUM_TSN_CRYPTO_HASH SingFHash() const     { return m_sing_fhash;  }
  // parametros especifioos del firmado
  void                 SingParams(void* params) { m_sing_data = params; }

  //-- Cifrado\Descifrado
  void               CipFHash(TSN::CCryptoHashMeta::ENUM_TSN_CRYPTO_HASH fhash) { m_cip_fhash = fhash; }
  __forceinline TSN::CCryptoHashMeta::ENUM_TSN_CRYPTO_HASH CipFHash() const     { return m_cip_fhash;  }
 };

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
CRsaKey::CRsaKey()
  : m_cip_fhash(CCryptoHashMeta::TSN_CRYPTO_HASH_TYPE_SHA256), m_sing_fhash(CCryptoHashMeta::TSN_CRYPTO_HASH_TYPE_SHA256),
    m_sing_padder(RSA_SING_PADDER_PSS), m_sing_data(NULL)
 {
 }


//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
class CRsaPrivateKey : public CRsaKey
 {
private:
  // general
  BigUInteger        m_n;         // producto de p y q
  ulong              m_e;         // exponente
  int                m_key_sbits; // tamaño de la clave en bits

  // privado
  BigUInteger        m_d;         // exponent privado

  // CRT
  BigUInteger        m_p;         // p primo
  BigUInteger        m_q;         // q primo
  BigUInteger        m_dp;
  BigUInteger        m_dq;
  BigUInteger        m_qinv;



public:
                     CRsaPrivateKey(void) {}
                    ~CRsaPrivateKey(void) {}

  //--- Desencvryptar
  bool               Decrypt(const uchar& chiper_text[], uchar& out[]);

  //--- Firmar
  bool               Firmar(const uchar& raw[], uchar& out[]);


  //--- foramtos de serilizacion


 };


//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
class CRsaPublicKey : public CRsaKey
 {
private:
  // general
  BigUInteger        m_n;         // producto de p y q
  ulong              m_e;         // exponente
  int                m_key_sbits; // tamaño de la clave en bits


public:
                     CRsaPublicKey(BigUInteger& n, ulong e, const int ksb);
                    ~CRsaPublicKey(void) {}

  //--- cifra un mensaje con la clave publica
  // raw = texto tal cual
  // out = salida
  bool               Cifrar(const uchar& raw[], uchar& out[]);

  //---
  // verifica una firma procedente de un mensaje cifrado
  bool               Verify(const uchar& firma[],  const uchar& data[]);

  //--- Serilizacion
  // serilizacion
  int                ToSubjectPublicKeyInfo(uchar& out[], int o_s);
  // formateo (Final PEM \ DER)
 };

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
CRsaPublicKey::CRsaPublicKey(BigUInteger &n, ulong e, const int ksb)
// nota aqui le "robamos" a n sus daots (nada de copies)
  :  m_n(n.m_v, n.m_v_s), m_e(e), m_key_sbits(ksb)
 {
 }

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
int CRsaPublicKey::ToSubjectPublicKeyInfo(uchar &out[], int o_s)
 {

  m_n.ToBytesBE()
 }
}


#endif // CRYPTOBYLEO_SRC_RSA_KEYS_H_MQH
//+------------------------------------------------------------------+