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/*************************************************
* ECKAEG implemenation *
* (C) 2007 Manuel Hartl, FlexSecure GmbH *
* 2007 Falko Strenzke, FlexSecure GmbH *
* 2008 Jack Lloyd *
*************************************************/
#include <botan/eckaeg.h>
#include <botan/numthry.h>
#include <botan/util.h>
#include <botan/der_enc.h>
#include <botan/ber_dec.h>
#include <botan/secmem.h>
#include <botan/point_gfp.h>
namespace Botan {
/*********************************
* ECKAEG_PublicKey *
*********************************/
void ECKAEG_PublicKey::affirm_init() const // virtual
{
EC_PublicKey::affirm_init();
}
void ECKAEG_PublicKey::set_all_values ( ECKAEG_PublicKey const& other )
{
m_param_enc = other.m_param_enc;
m_eckaeg_core = other.m_eckaeg_core;
m_enc_public_point = other.m_enc_public_point;
if ( other.mp_dom_pars.get() )
{
mp_dom_pars.reset ( new EC_Domain_Params ( * ( other.mp_dom_pars ) ) );
}
if ( other.mp_public_point.get() )
{
mp_public_point.reset ( new PointGFp ( * ( other.mp_public_point ) ) );
}
}
ECKAEG_PublicKey::ECKAEG_PublicKey ( ECKAEG_PublicKey const& other )
: Public_Key(),
EC_PublicKey()
{
set_all_values ( other );
}
ECKAEG_PublicKey const& ECKAEG_PublicKey::operator= ( ECKAEG_PublicKey const& rhs )
{
set_all_values ( rhs );
return *this;
}
void ECKAEG_PublicKey::X509_load_hook()
{
EC_PublicKey::X509_load_hook();
EC_PublicKey::affirm_init();
m_eckaeg_core = ECKAEG_Core ( *mp_dom_pars, BigInt ( 0 ), *mp_public_point );
}
ECKAEG_PublicKey::ECKAEG_PublicKey ( EC_Domain_Params const& dom_par, PointGFp const& public_point )
{
mp_dom_pars = std::auto_ptr<EC_Domain_Params> ( new EC_Domain_Params ( dom_par ) );
mp_public_point = std::auto_ptr<PointGFp> ( new PointGFp ( public_point ) );
if(mp_public_point->get_curve() != mp_dom_pars->get_curve())
{
throw Invalid_Argument("ECKAEG_PublicKey(): curve of arg. point and curve of arg. domain parameters are different");
}
EC_PublicKey::affirm_init();
m_eckaeg_core = ECKAEG_Core ( *mp_dom_pars, BigInt ( 0 ), *mp_public_point );
}
/*********************************
* ECKAEG_PrivateKey *
*********************************/
void ECKAEG_PrivateKey::affirm_init() const // virtual
{
EC_PrivateKey::affirm_init();
}
void ECKAEG_PrivateKey::PKCS8_load_hook ( bool generated )
{
EC_PrivateKey::PKCS8_load_hook ( generated );
EC_PrivateKey::affirm_init();
m_eckaeg_core = ECKAEG_Core ( *mp_dom_pars, m_private_value, *mp_public_point );
}
void ECKAEG_PrivateKey::set_all_values ( ECKAEG_PrivateKey const& other )
{
m_private_value = other.m_private_value;
m_param_enc = other.m_param_enc;
m_eckaeg_core = other.m_eckaeg_core;
m_enc_public_point = other.m_enc_public_point;
if ( other.mp_dom_pars.get() )
{
mp_dom_pars.reset ( new EC_Domain_Params ( * ( other.mp_dom_pars ) ) );
}
if ( other.mp_public_point.get() )
{
mp_public_point.reset ( new PointGFp ( * ( other.mp_public_point ) ) );
}
}
ECKAEG_PrivateKey::ECKAEG_PrivateKey(ECKAEG_PrivateKey const& other)
: Public_Key(),
EC_PublicKey(),
Private_Key(),
ECKAEG_PublicKey(),
EC_PrivateKey(),
PK_Key_Agreement_Key()
{
set_all_values(other);
}
ECKAEG_PrivateKey const& ECKAEG_PrivateKey::operator= (ECKAEG_PrivateKey const& rhs)
{
set_all_values(rhs);
return *this;
}
/**
* Derive a key
*/
SecureVector<byte> ECKAEG_PrivateKey::derive_key(const Public_Key& key) const
{
affirm_init();
const EC_PublicKey * p_ec_pk = dynamic_cast<const EC_PublicKey*>(&key);
if(!p_ec_pk)
{
throw Invalid_Argument("ECKAEG_PrivateKey::derive_key(): argument must be an EC_PublicKey");
}
p_ec_pk->affirm_init();
return m_eckaeg_core.agree ( p_ec_pk->get_public_point() );
}
}
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