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/*
* DSA Operations
* (C) 1999-2008 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_DSA_OPS_H__
#define BOTAN_DSA_OPS_H__
#include <botan/numthry.h>
#include <botan/pow_mod.h>
#include <botan/reducer.h>
#include <botan/dl_group.h>
namespace Botan {
/*
* DSA Operation
*/
class BOTAN_DLL DSA_Operation
{
public:
virtual bool verify(const byte[], u32bit,
const byte[], u32bit) const = 0;
virtual SecureVector<byte> sign(const byte[], u32bit,
const BigInt&) const = 0;
virtual DSA_Operation* clone() const = 0;
virtual ~DSA_Operation() {}
};
/*
* Botan's Default DSA Operation
*/
class BOTAN_DLL Default_DSA_Op : public DSA_Operation
{
public:
bool verify(const byte[], u32bit, const byte[], u32bit) const;
SecureVector<byte> sign(const byte[], u32bit, const BigInt&) const;
DSA_Operation* clone() const { return new Default_DSA_Op(*this); }
Default_DSA_Op(const DL_Group&, const BigInt&, const BigInt&);
private:
const BigInt x, y;
const DL_Group group;
Fixed_Base_Power_Mod powermod_g_p, powermod_y_p;
Modular_Reducer mod_p, mod_q;
};
}
#endif
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