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/*
* ECKAEG
* (C) 2007 Falko Strenzke, FlexSecure GmbH
* Manuel Hartl, FlexSecure GmbH
* (C) 2008 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_ECKAEG_KEY_H__
#define BOTAN_ECKAEG_KEY_H__
#include <botan/ecc_key.h>
#include <botan/eckaeg_core.h>
namespace Botan {
/**
* This class represents ECKAEG Public Keys.
*/
class BOTAN_DLL ECKAEG_PublicKey : public virtual EC_PublicKey
{
public:
/**
* Default constructor. Use this one if you want to later fill
* this object with data from an encoded key.
*/
ECKAEG_PublicKey() {}
/**
* 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
*/
ECKAEG_PublicKey(const EC_Domain_Params& dom_par,
const PointGFp& public_point);
/**
* Get this keys algorithm name.
* @result this keys algorithm name
*/
std::string algo_name() const { return "ECKAEG"; }
/**
* 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
*/
u32bit max_input_bits() const
{
if(!mp_dom_pars.get())
throw Invalid_State("ECKAEG_PublicKey::max_input_bits(): domain parameters not set");
return mp_dom_pars->get_order().bits();
}
ECKAEG_PublicKey(ECKAEG_PublicKey const& other);
ECKAEG_PublicKey const& operator= (ECKAEG_PublicKey const& rhs);
/**
* Make sure that the public point and domain parameters of this
* key are set.
* @throw Invalid_State if either of the two data members is not set
*/
virtual void affirm_init() const;
protected:
void X509_load_hook();
ECKAEG_Core m_eckaeg_core;
private:
void set_all_values(const ECKAEG_PublicKey& other);
};
/**
* This class represents ECKAEG Private Keys.
*/
class BOTAN_DLL ECKAEG_PrivateKey : public ECKAEG_PublicKey,
public EC_PrivateKey,
public PK_Key_Agreement_Key
{
public:
/**
* Generate a new private key
* @param the domain parameters to used for this key
*/
ECKAEG_PrivateKey(RandomNumberGenerator& rng,
const EC_Domain_Params& dom_pars)
{
mp_dom_pars = std::unique_ptr<EC_Domain_Params>(new EC_Domain_Params(dom_pars));
generate_private_key(rng);
mp_public_point->check_invariants();
m_eckaeg_core = ECKAEG_Core(*mp_dom_pars, m_private_value, *mp_public_point);
}
/**
* Default constructor. Use this one if you want to later fill this object with data
* from an encoded key.
*/
ECKAEG_PrivateKey() {}
ECKAEG_PrivateKey(ECKAEG_PrivateKey const& other);
ECKAEG_PrivateKey const& operator=(ECKAEG_PrivateKey const& rhs);
MemoryVector<byte> public_value() const;
void PKCS8_load_hook(bool = false);
/**
* Derive a shared key with the other partys public key.
* @param key the other partys public key
* @param key_len the other partys public key
*/
SecureVector<byte> derive_key(const byte key[], u32bit key_len) const;
/**
* Derive a shared key with the other partys public key.
* @param other the other partys public key
*/
SecureVector<byte> derive_key(const ECKAEG_PublicKey& other) const;
/**
* Make sure that the public key parts of this object are set
* (calls EC_PublicKey::affirm_init()) as well as the private key
* value.
* @throw Invalid_State if the above conditions are not satisfied
*/
virtual void affirm_init() const;
private:
void set_all_values(const ECKAEG_PrivateKey& other);
};
}
#endif
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