#include <pk_keys.h>

Inheritance diagram for Botan::Asymmetric_Key:

Public Member Functions
virtual std::string	algo_name () const =0

virtual size_t	estimated_strength () const =0

virtual std::unique_ptr< Private_Key >	generate_another (RandomNumberGenerator &rng) const =0

virtual const BigInt &	get_int_field (std::string_view field) const

virtual OID	object_identifier () const

virtual bool	supports_operation (PublicKeyOperation op) const =0

virtual	~Asymmetric_Key ()=default

Detailed Description

An interface for objects that are keys in public key algorithms

This is derived for both public and private keys

Definition at line 59 of file pk_keys.h.

Constructor & Destructor Documentation

◆ ~Asymmetric_Key()

virtual Botan::Asymmetric_Key::~Asymmetric_Key ( )

virtualdefault

Member Function Documentation

◆ algo_name()

virtual std::string Botan::Asymmetric_Key::algo_name ( ) const

pure virtual

Get the name of the underlying public key scheme.

Returns: name of the public key scheme

Implemented in Botan::TPM_PrivateKey, Botan::Curve25519_PublicKey, Botan::Ed448_PublicKey, Botan::X448_PublicKey, Botan::DH_PublicKey, Botan::Dilithium_PublicKey, Botan::DSA_PublicKey, Botan::ECDH_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, Botan::Ed25519_PublicKey, Botan::ElGamal_PublicKey, Botan::FrodoKEM_PublicKey, Botan::GOST_3410_PublicKey, Botan::Kyber_PublicKey, Botan::McEliece_PublicKey, Botan::RSA_PublicKey, Botan::SM2_PublicKey, Botan::SphincsPlus_PublicKey, Botan::XMSS_PublicKey, Botan::TLS::Hybrid_KEM_PublicKey, and Botan::TLS::KEX_to_KEM_Adapter_PublicKey.

Referenced by Botan::PKCS8::BER_encode(), botan_pubkey_sm2_compute_za(), Botan::TLS::Policy::check_peer_key_acceptable(), Botan::X509_Object::choose_sig_format(), Botan::TLS::Handshake_State::choose_sig_format(), Botan::TLS::Client_Key_Exchange::Client_Key_Exchange(), Botan::TLS::Client_Key_Exchange::Client_Key_Exchange(), Botan::Private_Key::create_decryption_op(), Botan::Public_Key::create_encryption_op(), Botan::Private_Key::create_kem_decryption_op(), Botan::Public_Key::create_kem_encryption_op(), Botan::Private_Key::create_key_agreement_op(), Botan::Private_Key::create_signature_op(), Botan::Public_Key::create_verification_op(), Botan::Public_Key::create_x509_verification_op(), get_int_field(), object_identifier(), Botan::TLS::Handshake_State::parse_sig_format(), Botan::PK_Decryptor_EME::PK_Decryptor_EME(), Botan::PK_Encryptor_EME::PK_Encryptor_EME(), Botan::PK_KEM_Decryptor::PK_KEM_Decryptor(), Botan::PK_KEM_Encryptor::PK_KEM_Encryptor(), Botan::PK_Key_Agreement::PK_Key_Agreement(), Botan::PK_Signer::PK_Signer(), Botan::PK_Verifier::PK_Verifier(), Botan::PK_Verifier::PK_Verifier(), and Botan::Private_Key::raw_private_key_bits().

◆ estimated_strength()

virtual size_t Botan::Asymmetric_Key::estimated_strength ( ) const

pure virtual

Return the estimated strength of the underlying key against the best currently known attack. Note that this ignores anything but pure attacks against the key itself and do not take into account padding schemes, usage mistakes, etc which might reduce the strength. However it does suffice to provide an upper bound.

Returns: estimated strength in bits

Implemented in Botan::TPM_PrivateKey, Botan::Curve25519_PublicKey, Botan::Ed448_PublicKey, Botan::X448_PublicKey, Botan::DH_PublicKey, Botan::Dilithium_PublicKey, Botan::DSA_PublicKey, Botan::EC_PublicKey, Botan::Ed25519_PublicKey, Botan::ElGamal_PublicKey, Botan::FrodoKEM_PublicKey, Botan::Kyber_PublicKey, Botan::McEliece_PublicKey, Botan::RSA_PublicKey, Botan::SphincsPlus_PublicKey, Botan::XMSS_PublicKey, Botan::TLS::Hybrid_KEM_PublicKey, and Botan::TLS::KEX_to_KEM_Adapter_PublicKey.

◆ generate_another()

virtual std::unique_ptr< Private_Key > Botan::Asymmetric_Key::generate_another ( RandomNumberGenerator & rng ) const

pure virtual

Generate another (cryptographically independent) key pair using the same algorithm parameters as this key. This is most useful for algorithms that support PublicKeyOperation::KeyAgreement to generate a fitting ephemeral key pair. For other key types it might throw Not_Implemented.

Implemented in Botan::TPM_PrivateKey, Botan::Curve25519_PublicKey, Botan::Ed448_PublicKey, Botan::X448_PublicKey, Botan::DH_PublicKey, Botan::Dilithium_PublicKey, Botan::DSA_PublicKey, Botan::ECDH_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, Botan::Ed25519_PublicKey, Botan::ElGamal_PublicKey, Botan::FrodoKEM_PublicKey, Botan::GOST_3410_PublicKey, Botan::Kyber_PublicKey, Botan::McEliece_PublicKey, Botan::SM2_PublicKey, Botan::SphincsPlus_PublicKey, Botan::XMSS_PublicKey, Botan::TLS::Hybrid_KEM_PublicKey, Botan::TLS::KEX_to_KEM_Adapter_PublicKey, Botan::ECDSA_PublicKey, and Botan::RSA_PublicKey.

◆ get_int_field()

const BigInt & Botan::Asymmetric_Key::get_int_field ( std::string_view field ) const

virtual

Access an algorithm specific field

If the field is not known for this algorithm, an Invalid_Argument is thrown. The interpretation of the result requires knowledge of which algorithm is involved. For instance for RSA "p" represents one of the secret primes, while for DSA "p" is the public prime.

Some algorithms may not implement this method at all.

This is primarily used to implement the FFI botan_pubkey_get_field and botan_privkey_get_field functions.

Reimplemented in Botan::EC_PrivateKey, Botan::DH_PublicKey, Botan::DH_PrivateKey, Botan::DSA_PublicKey, Botan::DSA_PrivateKey, Botan::EC_PublicKey, Botan::ElGamal_PublicKey, Botan::ElGamal_PrivateKey, Botan::RSA_PublicKey, and Botan::RSA_PrivateKey.

Definition at line 18 of file pk_keys.cpp.

                                                                      {
   throw Unknown_PK_Field_Name(algo_name(), field);
}

References algo_name().

Referenced by Botan::EC_PublicKey::get_int_field(), and Botan::RSA_PublicKey::get_int_field().

◆ object_identifier()

OID Botan::Asymmetric_Key::object_identifier ( ) const

virtual

Get the OID of the underlying public key scheme.

Returns: OID of the public key scheme

Reimplemented in Botan::Dilithium_PublicKey, Botan::FrodoKEM_PublicKey, Botan::Kyber_PublicKey, and Botan::SphincsPlus_PublicKey.

Definition at line 22 of file pk_keys.cpp.

                                            {
   try {
      return OID::from_string(algo_name());
   } catch(Lookup_Error&) {
      throw Lookup_Error(fmt("Public key algorithm {} has no defined OIDs", algo_name()));
   }
}