/*************************************************
* PK Algorithm Core Header File                  *
* (C) 1999-2004 The Botan Project                *
*************************************************/

#ifndef BOTAN_PK_CORE__
#define BOTAN_PK_CORE__

#include <botan/bigint.h>
#include <botan/dl_param.h>
#include <botan/blinding.h>
#include <botan/pk_ops.h>

namespace Botan {

/*************************************************
* IF Core                                        *
*************************************************/
class IF_Core
   {
   public:
      BigInt public_op(const BigInt&) const;
      BigInt private_op(const BigInt&) const;

      IF_Core& operator=(const IF_Core&);

      IF_Core() { op = 0; }
      IF_Core(const IF_Core&);
      IF_Core(const BigInt&, const BigInt&,
              const BigInt& = 0, const BigInt& = 0, const BigInt& = 0,
              const BigInt& = 0, const BigInt& = 0, const BigInt& = 0);
      ~IF_Core() { delete op; }
   private:
      IF_Operation* op;
      Blinder blinder;
   };

/*************************************************
* DSA Core                                       *
*************************************************/
class DSA_Core
   {
   public:
      SecureVector<byte> sign(const byte[], u32bit, const BigInt&) const;
      bool verify(const byte[], u32bit, const byte[], u32bit) const;

      DSA_Core& operator=(const DSA_Core&);

      DSA_Core() { op = 0; }
      DSA_Core(const DSA_Core&);
      DSA_Core(const DL_Group&, const BigInt&, const BigInt& = 0);
      ~DSA_Core() { delete op; }
   private:
      DSA_Operation* op;
   };

/*************************************************
* NR Core                                        *
*************************************************/
class NR_Core
   {
   public:
      SecureVector<byte> sign(const byte[], u32bit, const BigInt&) const;
      SecureVector<byte> verify(const byte[], u32bit) const;

      NR_Core& operator=(const NR_Core&);

      NR_Core() { op = 0; }
      NR_Core(const NR_Core&);
      NR_Core(const DL_Group&, const BigInt&, const BigInt& = 0);
      ~NR_Core() { delete op; }
   private:
      NR_Operation* op;
   };

/*************************************************
* ElGamal Core                                   *
*************************************************/
class ELG_Core
   {
   public:
      SecureVector<byte> encrypt(const byte[], u32bit, const BigInt&) const;
      SecureVector<byte> decrypt(const byte[], u32bit) const;

      ELG_Core& operator=(const ELG_Core&);

      ELG_Core() { op = 0; }
      ELG_Core(const ELG_Core&);
      ELG_Core(const DL_Group&, const BigInt&, const BigInt& = 0);
      ~ELG_Core() { delete op; }
   private:
      ELG_Operation* op;
      Blinder blinder;
      u32bit p_bytes;
   };

/*************************************************
* DH Core                                        *
*************************************************/
class DH_Core
   {
   public:
      BigInt agree(const BigInt&) const;

      DH_Core& operator=(const DH_Core&);

      DH_Core() { op = 0; }
      DH_Core(const DH_Core&);
      DH_Core(const DL_Group&, const BigInt&);
      ~DH_Core() { delete op; }
   private:
      DH_Operation* op;
      Blinder blinder;
   };

}

#endif
