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/*
* Nyberg-Rueppel
* (C) 1999-2010 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_NYBERG_RUEPPEL_H__
#define BOTAN_NYBERG_RUEPPEL_H__
#include <botan/dl_algo.h>
namespace Botan {
/**
* Nyberg-Rueppel Public Key
*/
class BOTAN_DLL NR_PublicKey : public virtual DL_Scheme_PublicKey
{
public:
std::string algo_name() const { return "NR"; }
DL_Group::Format group_format() const { return DL_Group::ANSI_X9_57; }
size_t message_parts() const { return 2; }
size_t message_part_size() const { return group_q().bytes(); }
size_t max_input_bits() const { return (group_q().bits() - 1); }
NR_PublicKey(const AlgorithmIdentifier& alg_id,
const secure_vector<byte>& key_bits);
NR_PublicKey(const DL_Group& group, const BigInt& pub_key);
protected:
NR_PublicKey() {}
};
/**
* Nyberg-Rueppel Private Key
*/
class BOTAN_DLL NR_PrivateKey : public NR_PublicKey,
public virtual DL_Scheme_PrivateKey
{
public:
bool check_key(RandomNumberGenerator& rng, bool strong) const;
NR_PrivateKey(const AlgorithmIdentifier& alg_id,
const secure_vector<byte>& key_bits,
RandomNumberGenerator& rng);
NR_PrivateKey(RandomNumberGenerator& rng,
const DL_Group& group,
const BigInt& x = 0);
};
}
#endif
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