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/*
* ECGDSA (BSI-TR-03111, version 2.0)
* (C) 2016 René Korthaus
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_ECGDSA_KEY_H__
#define BOTAN_ECGDSA_KEY_H__
#include <botan/ecc_key.h>
namespace Botan {
/**
* This class represents ECGDSA public keys.
*/
class BOTAN_DLL ECGDSA_PublicKey : public virtual EC_PublicKey
{
public:
/**
* Construct a public key from a given public point.
* @param dom_par the domain parameters associated with this key
* @param public_point the public point defining this key
*/
ECGDSA_PublicKey(const EC_Group& dom_par,
const PointGFp& public_point) :
EC_PublicKey(dom_par, public_point) {}
ECGDSA_PublicKey(const AlgorithmIdentifier& alg_id,
const secure_vector<byte>& key_bits) :
EC_PublicKey(alg_id, key_bits) {}
/**
* Get this keys algorithm name.
* @result this keys algorithm name ("ECGDSA")
*/
std::string algo_name() const override { return "ECGDSA"; }
/**
* Get the maximum number of bits allowed to be fed to this key.
* This is the bitlength of the order of the base point.
* @result the maximum number of input bits
*/
size_t max_input_bits() const override
{ return domain().get_order().bits(); }
size_t message_parts() const override { return 2; }
size_t message_part_size() const override
{ return domain().get_order().bytes(); }
std::unique_ptr<PK_Ops::Verification>
create_verification_op(RandomNumberGenerator& rng,
const std::string& params,
const std::string& provider) const override;
protected:
ECGDSA_PublicKey() {}
};
/**
* This class represents ECGDSA private keys.
*/
class BOTAN_DLL ECGDSA_PrivateKey : public ECGDSA_PublicKey,
public EC_PrivateKey
{
public:
/**
* Load a private key
* @param alg_id the X.509 algorithm identifier
* @param key_bits PKCS #8 structure
*/
ECGDSA_PrivateKey(const AlgorithmIdentifier& alg_id,
const secure_vector<byte>& key_bits) :
EC_PrivateKey(alg_id, key_bits, true) {}
/**
* Generate a new private key
* @param rng a random number generator
* @param domain parameters to used for this key
* @param x the private key (if zero, generate a new random key)
*/
ECGDSA_PrivateKey(RandomNumberGenerator& rng,
const EC_Group& domain,
const BigInt& x = 0) :
EC_PrivateKey(rng, domain, x, true) {}
bool check_key(RandomNumberGenerator& rng, bool) const override;
std::unique_ptr<PK_Ops::Signature>
create_signature_op(RandomNumberGenerator& rng,
const std::string& params,
const std::string& provider) const;
};
}
#endif
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