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/*************************************************
* DH Operations Source File *
* (C) 1999-2007 Jack Lloyd *
*************************************************/
#include <botan/eng_def.h>
#include <botan/pow_mod.h>
#include <botan/numthry.h>
#include <botan/reducer.h>
namespace Botan {
namespace {
/*************************************************
* Default DH Operation *
*************************************************/
class Default_DH_Op : public DH_Operation
{
public:
BigInt agree(const BigInt& i) const { return powermod_x_p(i); }
DH_Operation* clone() const { return new Default_DH_Op(*this); }
Default_DH_Op(const DL_Group& group, const BigInt& x) :
powermod_x_p(x, group.get_p()) {}
private:
const Fixed_Exponent_Power_Mod powermod_x_p;
};
}
/*************************************************
* Acquire a DH op *
*************************************************/
DH_Operation* Default_Engine::dh_op(const DL_Group& group,
const BigInt& x) const
{
return new Default_DH_Op(group, x);
}
}
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