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/*
* ECDSA
* (C) 2007 Falko Strenzke, FlexSecure GmbH
* Manuel Hartl, FlexSecure GmbH
* (C) 2008-2010 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_ECC_PUBLIC_KEY_BASE_H__
#define BOTAN_ECC_PUBLIC_KEY_BASE_H__
#include <botan/ec_dompar.h>
#include <botan/pk_keys.h>
#include <botan/x509_key.h>
#include <botan/pkcs8.h>
#include <memory>
namespace Botan {
/**
* This class represents abstract EC Public Keys. When encoding a key
* via an encoder that can be accessed via the corresponding member
* functions, the key will decide upon its internally stored encoding
* information whether to encode itself with or without domain
* parameters, or using the domain parameter oid. Furthermore, a public
* key without domain parameters can be decoded. In that case, it
* cannot be used for verification until its domain parameters are set
* by calling the corresponding member function.
*/
class BOTAN_DLL EC_PublicKey : public virtual Public_Key
{
public:
EC_PublicKey() : domain_encoding(EC_DOMPAR_ENC_EXPLICIT) {}
EC_PublicKey(const EC_Domain_Params& dom_par,
const PointGFp& pub_point);
EC_PublicKey(const AlgorithmIdentifier& alg_id,
const MemoryRegion<byte>& key_bits);
virtual ~EC_PublicKey() {}
/**
* Get the public point of this key.
* @throw Invalid_State is thrown if the
* domain parameters of this point are not set
* @result the public point of this key
*/
const PointGFp& public_point() const { return public_key; }
AlgorithmIdentifier algorithm_identifier() const;
MemoryVector<byte> x509_subject_public_key() const;
/**
* Get the domain parameters of this key.
* @throw Invalid_State is thrown if the
* domain parameters of this point are not set
* @result the domain parameters of this key
*/
const EC_Domain_Params& domain() const { return domain_params; }
/**
* Set the domain parameter encoding to be used when encoding this key.
* @param enc the encoding to use
*/
void set_parameter_encoding(EC_Domain_Params_Encoding enc);
/**
* Return the DER encoding of this keys domain in whatever format
* is preset for this particular key
*/
MemoryVector<byte> DER_domain() const
{ return domain().DER_encode(domain_format()); }
/**
* Get the domain parameter encoding to be used when encoding this key.
* @result the encoding to use
*/
EC_Domain_Params_Encoding domain_format() const
{ return domain_encoding; }
protected:
virtual void X509_load_hook();
EC_Domain_Params domain_params;
PointGFp public_key;
EC_Domain_Params_Encoding domain_encoding;
};
/**
* This abstract class represents general EC Private Keys
*/
class BOTAN_DLL EC_PrivateKey : public virtual EC_PublicKey,
public virtual Private_Key
{
public:
EC_PrivateKey() {}
EC_PrivateKey(const EC_Domain_Params& domain,
const BigInt& private_key);
EC_PrivateKey(RandomNumberGenerator& rng,
const EC_Domain_Params& domain);
virtual ~EC_PrivateKey() {}
MemoryVector<byte> pkcs8_private_key() const;
/**
* Get an PKCS#8 decoder that can be used to decoded a stored key into
* this key.
* @result an PKCS#8 decoder for this key
*/
PKCS8_Decoder* pkcs8_decoder(RandomNumberGenerator&);
/**
* Get the private key value of this key object.
* @result the private key value of this key object
*/
const BigInt& private_value() const;
protected:
virtual void PKCS8_load_hook(bool = false);
BigInt private_key;
};
}
#endif
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