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/*
* SM2
* (C) 2017 Ribose Inc
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_SM2_KEY_H_
#define BOTAN_SM2_KEY_H_
#include <botan/ecc_key.h>
namespace Botan {
/**
* This class represents SM2 Signature public keys
*/
class BOTAN_PUBLIC_API(2,2) SM2_Signature_PublicKey : public virtual EC_PublicKey
{
public:
/**
* Create 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
*/
SM2_Signature_PublicKey(const EC_Group& dom_par,
const PointGFp& public_point) :
EC_PublicKey(dom_par, public_point) {}
/**
* Load a public key.
* @param alg_id the X.509 algorithm identifier
* @param key_bits DER encoded public key bits
*/
SM2_Signature_PublicKey(const AlgorithmIdentifier& alg_id,
const std::vector<uint8_t>& key_bits) :
EC_PublicKey(alg_id, key_bits) {}
/**
* Get this keys algorithm name.
* @result this keys algorithm name
*/
std::string algo_name() const override { return "SM2_Sig"; }
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(const std::string& params,
const std::string& provider) const override;
protected:
SM2_Signature_PublicKey() = default;
};
/**
* This class represents SM2 Signature private keys
*/
class BOTAN_PUBLIC_API(2,2) SM2_Signature_PrivateKey final : public SM2_Signature_PublicKey,
public EC_PrivateKey
{
public:
/**
* Load a private key
* @param alg_id the X.509 algorithm identifier
* @param key_bits ECPrivateKey bits
*/
SM2_Signature_PrivateKey(const AlgorithmIdentifier& alg_id,
const secure_vector<uint8_t>& key_bits);
/**
* Create a 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)
*/
SM2_Signature_PrivateKey(RandomNumberGenerator& rng,
const EC_Group& domain,
const BigInt& x = 0);
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 override;
const BigInt& get_da_inv() const { return m_da_inv; }
private:
BigInt m_da_inv;
};
class HashFunction;
std::vector<uint8_t> sm2_compute_za(HashFunction& hash,
const std::string& user_id,
const EC_Group& domain,
const PointGFp& pubkey);
}
#endif
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