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/*
* X448
* (C) 2024 Jack Lloyd
* 2024 Fabian Albert - Rohde & Schwarz Cybersecurity
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_X448_H_
#define BOTAN_X448_H_
#include <botan/pk_keys.h>
#include <array>
namespace Botan {
/**
* @brief A public key for the X448 key agreement scheme according to RFC 7748.
*/
class BOTAN_PUBLIC_API(3, 4) X448_PublicKey : public virtual Public_Key {
public:
/**
* Create a X448 Public Key.
* @param alg_id the X.509 algorithm identifier
* @param key_bits DER encoded public key bits
*/
X448_PublicKey(const AlgorithmIdentifier& alg_id, std::span<const uint8_t> key_bits);
/**
* Create a X448 Public Key.
* @param pub 56-byte raw public key
*/
explicit X448_PublicKey(std::span<const uint8_t> pub);
std::string algo_name() const override { return "X448"; }
size_t estimated_strength() const override { return 224; }
size_t key_length() const override { return 448; }
bool check_key(RandomNumberGenerator& rng, bool strong) const override;
AlgorithmIdentifier algorithm_identifier() const override;
BOTAN_DEPRECATED("Use raw_public_key_bits") std::vector<uint8_t> public_value() const {
return raw_public_key_bits();
}
std::vector<uint8_t> raw_public_key_bits() const override;
std::vector<uint8_t> public_key_bits() const override;
bool supports_operation(PublicKeyOperation op) const override { return (op == PublicKeyOperation::KeyAgreement); }
std::unique_ptr<Private_Key> generate_another(RandomNumberGenerator& rng) const final;
protected:
X448_PublicKey() = default;
std::array<uint8_t, 56> m_public;
};
BOTAN_DIAGNOSTIC_PUSH
BOTAN_DIAGNOSTIC_IGNORE_INHERITED_VIA_DOMINANCE
/**
* @brief A private key for the X448 key agreement scheme according to RFC 7748.
*/
class BOTAN_PUBLIC_API(3, 4) X448_PrivateKey final : public X448_PublicKey,
public virtual Private_Key,
public virtual PK_Key_Agreement_Key {
public:
/**
* Construct a private key from the specified parameters.
* @param alg_id the X.509 algorithm identifier
* @param key_bits PKCS #8 structure
*/
X448_PrivateKey(const AlgorithmIdentifier& alg_id, std::span<const uint8_t> key_bits);
/**
* Generate a private key.
* @param rng the RNG to use
*/
explicit X448_PrivateKey(RandomNumberGenerator& rng);
/**
* Construct a private key from the specified parameters.
* @param secret_key the private key
*/
explicit X448_PrivateKey(std::span<const uint8_t> secret_key);
std::vector<uint8_t> public_value() const override { return raw_public_key_bits(); }
secure_vector<uint8_t> raw_private_key_bits() const override { return {m_private.begin(), m_private.end()}; }
secure_vector<uint8_t> private_key_bits() const override;
std::unique_ptr<Public_Key> public_key() const override;
bool check_key(RandomNumberGenerator& rng, bool strong) const override;
std::unique_ptr<PK_Ops::Key_Agreement> create_key_agreement_op(RandomNumberGenerator& rng,
std::string_view params,
std::string_view provider) const override;
private:
secure_vector<uint8_t> m_private;
};
BOTAN_DIAGNOSTIC_POP
} // namespace Botan
#endif