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/*
* PKCS#11 ECC
* (C) 2016 Daniel Neus, Sirrix AG
* (C) 2016 Philipp Weber, Sirrix AG
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_P11_ECC_H__
#define BOTAN_P11_ECC_H__
#include <botan/build.h>
#include <botan/p11_object.h>
#if defined(BOTAN_HAS_ECC_PUBLIC_KEY_CRYPTO)
#include <botan/pk_keys.h>
#include <botan/ecc_key.h>
#include <botan/ec_group.h>
#include <botan/rng.h>
#include <botan/alg_id.h>
#include <vector>
namespace Botan {
namespace PKCS11 {
class Session;
/// Properties for generating a PKCS#11 EC public key
class BOTAN_DLL EC_PublicKeyGenerationProperties final : public PublicKeyProperties
{
public:
/// @param ec_params DER-encoding of an ANSI X9.62 Parameters value
EC_PublicKeyGenerationProperties(const std::vector<uint8_t>& ec_params);
/// @return the DER-encoding of the ec parameters according to ANSI X9.62
inline const std::vector<uint8_t>& ec_params() const
{
return m_ec_params;
}
private:
const std::vector<uint8_t> m_ec_params;
};
/// Properties for importing a PKCS#11 EC public key
class BOTAN_DLL EC_PublicKeyImportProperties final : public PublicKeyProperties
{
public:
/**
* @param ec_params DER-encoding of an ANSI X9.62 Parameters value
* @param ec_point DER-encoding of ANSI X9.62 ECPoint value Q
*/
EC_PublicKeyImportProperties(const std::vector<uint8_t>& ec_params, const std::vector<uint8_t>& ec_point);
/// @return the DER-encoding of the ec parameters according to ANSI X9.62
inline const std::vector<uint8_t>& ec_params() const
{
return m_ec_params;
}
/// @return the DER-encoding of the ec public point according to ANSI X9.62
inline const std::vector<uint8_t>& ec_point() const
{
return m_ec_point;
}
private:
const std::vector<uint8_t> m_ec_params;
const std::vector<uint8_t> m_ec_point;
};
/// Represents a PKCS#11 EC public key
class BOTAN_DLL PKCS11_EC_PublicKey : public virtual EC_PublicKey,
public Object
{
public:
static const ObjectClass Class = ObjectClass::PublicKey;
/**
* Creates a PKCS11_EC_PublicKey object from an existing PKCS#11 EC public key
* @param session the session to use
* @param handle the handle of the ecc public key
*/
PKCS11_EC_PublicKey(Session& session, ObjectHandle handle);
/**
* Imports an EC public key
* @param session the session to use
* @param props the attributes of the public key
*/
PKCS11_EC_PublicKey(Session& session, const EC_PublicKeyImportProperties& props);
};
/// Properties for generating a PKCS#11 EC private key
class BOTAN_DLL EC_PrivateKeyGenerationProperties final : public PrivateKeyProperties
{
public:
EC_PrivateKeyGenerationProperties()
: PrivateKeyProperties(KeyType::Ec)
{}
};
/// Properties for importing a PKCS#11 EC private key
class BOTAN_DLL EC_PrivateKeyImportProperties final : public PrivateKeyProperties
{
public:
/**
* @param ec_params DER-encoding of an ANSI X9.62 Parameters value
* @param value ANSI X9.62 private value d
*/
EC_PrivateKeyImportProperties(const std::vector<uint8_t>& ec_params, const BigInt& value);
/// @return the DER-encoding of the ec parameters according to ANSI X9.62
inline const std::vector<uint8_t>& ec_params() const
{
return m_ec_params;
}
/// @return the value of the ec private key
inline const BigInt& value() const
{
return m_value;
}
private:
const std::vector<uint8_t> m_ec_params;
const BigInt m_value;
};
// note: don't inherit from PKCS11_EC_PublicKey: a private key object IS NOT A public key object on a smartcard (-> two different objects)
// note: don't inherit from EC_PublicKey: the public key can not be extracted from a PKCS11-EC-PrivateKey (its only attributes are CKA_EC_PARAMS and CKA_VALUE)
/// Represents a PKCS#11 EC private key
class BOTAN_DLL PKCS11_EC_PrivateKey : public virtual Private_Key,
public Object
{
public:
static const ObjectClass Class = ObjectClass::PrivateKey;
/**
* Creates a PKCS11_EC_PrivateKey object from an existing PKCS#11 EC private key
* @param session the session to use
* @param handle the handle of the EC private key
*/
PKCS11_EC_PrivateKey(Session& session, ObjectHandle handle);
/**
* Imports an EC private key
* @param session the session to use
* @param props the attributes of the private key
*/
PKCS11_EC_PrivateKey(Session& session, const EC_PrivateKeyImportProperties& props);
/**
* Generates a PKCS#11 EC private key
* @param session the session to use
* @param ec_params DER-encoding of an ANSI X9.62 Parameters value
* @param props the attributes of the private key
* @note no persistent public key object will be created
*/
PKCS11_EC_PrivateKey(Session& session, const std::vector<uint8_t>& ec_params,
const EC_PrivateKeyGenerationProperties& props);
/// @returns the domain of the EC private key
inline const EC_Group& domain() const
{
return m_domain_params;
}
/**
* Sets the associated public point of this private key
* @param point the public point
* @param point_encoding encoding of the point (default DER-encoded)
*/
void set_public_point(const PointGFp& point, PublicPointEncoding point_encoding = PublicPointEncoding::Der)
{
m_public_key = point;
m_point_encoding = point_encoding;
}
/**
* Gets the public_point
* @note the public key must be set using `set_public_point`
* because it is not possible to infer the public key from a PKCS#11 EC private key
* @return the public point of the private key
* @throws Exception if the public point was not set using set_public_point()
*/
const PointGFp& public_point() const
{
if(m_public_key.is_zero())
{
throw Exception("Public point not set. Inferring the public key from a PKCS#11 ec private key is not possible.");
}
return m_public_key;
}
/// @return the encoding format for the public point when it is passed to cryptoki functions as an argument
PublicPointEncoding point_encoding() const
{
return m_point_encoding;
}
// Private_Key methods
std::vector<uint8_t> public_key_bits() const override;
std::size_t key_length() const override;
std::size_t estimated_strength() const override;
bool check_key(RandomNumberGenerator&, bool) const override;
AlgorithmIdentifier algorithm_identifier() const override;
private:
EC_Group m_domain_params;
PointGFp m_public_key;
PublicPointEncoding m_point_encoding = PublicPointEncoding::Der;
};
}
}
#endif
#endif
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