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/*************************************************
* IF Operations Header File *
* (C) 1999-2008 Jack Lloyd *
*************************************************/
#ifndef BOTAN_IF_OP_H__
#define BOTAN_IF_OP_H__
#include <botan/bigint.h>
#include <botan/pow_mod.h>
#include <botan/reducer.h>
namespace Botan {
/*************************************************
* IF Operation *
*************************************************/
class BOTAN_DLL IF_Operation
{
public:
virtual BigInt public_op(const BigInt&) const = 0;
virtual BigInt private_op(const BigInt&) const = 0;
virtual IF_Operation* clone() const = 0;
virtual ~IF_Operation() {}
};
/*************************************************
* Default IF Operation *
*************************************************/
class BOTAN_DLL Default_IF_Op : public IF_Operation
{
public:
BigInt public_op(const BigInt& i) const
{ return powermod_e_n(i); }
BigInt private_op(const BigInt&) const;
IF_Operation* clone() const { return new Default_IF_Op(*this); }
Default_IF_Op(const BigInt&, const BigInt&, const BigInt&,
const BigInt&, const BigInt&, const BigInt&,
const BigInt&, const BigInt&);
private:
Fixed_Exponent_Power_Mod powermod_e_n, powermod_d1_p, powermod_d2_q;
Modular_Reducer reducer;
BigInt c, q;
};
}
#endif
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