#include <hybrid_public_key.h>

Inheritance diagram for Botan::TLS::Hybrid_KEM_PrivateKey:

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

std::string	algo_name () const override

virtual AlgorithmIdentifier	algorithm_identifier () const =0

AlgorithmIdentifier	algorithm_identifier () const override

bool	check_key (RandomNumberGenerator &rng, bool strong) const override

virtual std::unique_ptr< PK_Ops::Decryption >	create_decryption_op (RandomNumberGenerator &rng, std::string_view params, std::string_view provider) const

virtual std::unique_ptr< PK_Ops::Encryption >	create_encryption_op (RandomNumberGenerator &rng, std::string_view params, std::string_view provider) const

std::unique_ptr< PK_Ops::KEM_Decryption >	create_kem_decryption_op (RandomNumberGenerator &rng, std::string_view kdf, std::string_view provider="base") const override

std::unique_ptr< PK_Ops::KEM_Encryption >	create_kem_encryption_op (std::string_view kdf, std::string_view provider="base") const override

virtual std::unique_ptr< PK_Ops::KEM_Encryption >	create_kem_encryption_op (std::string_view params, std::string_view provider) const

virtual std::unique_ptr< PK_Ops::Key_Agreement >	create_key_agreement_op (RandomNumberGenerator &rng, std::string_view params, std::string_view provider) const

virtual std::unique_ptr< PK_Ops::Signature >	create_signature_op (RandomNumberGenerator &rng, std::string_view params, std::string_view provider) const

virtual std::unique_ptr< PK_Ops::Verification >	create_verification_op (std::string_view params, std::string_view provider) const

virtual std::unique_ptr< PK_Ops::Verification >	create_x509_verification_op (const AlgorithmIdentifier &signature_algorithm, std::string_view provider) const

virtual Signature_Format	default_x509_signature_format () const

virtual size_t	estimated_strength () const =0

size_t	estimated_strength () const override

std::string	fingerprint_private (std::string_view alg) const

std::string	fingerprint_public (std::string_view alg="SHA-256") const

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

std::unique_ptr< Private_Key >	generate_another (RandomNumberGenerator &rng) const final

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

OID	get_oid () const

	Hybrid_KEM_PrivateKey (std::vector< std::unique_ptr< Private_Key > > private_keys)

virtual size_t	key_length () const =0

size_t	key_length () const override

virtual size_t	message_part_size () const

virtual size_t	message_parts () const

virtual OID	object_identifier () const

virtual AlgorithmIdentifier	pkcs8_algorithm_identifier () const

secure_vector< uint8_t >	private_key_bits () const override

secure_vector< uint8_t >	private_key_info () const

const auto &	private_keys () const

std::unique_ptr< Public_Key >	public_key () const override

virtual std::vector< uint8_t >	public_key_bits () const =0

std::vector< uint8_t >	public_key_bits () const override

const auto &	public_keys () const

std::vector< uint8_t >	public_value () const

virtual secure_vector< uint8_t >	raw_private_key_bits () const

virtual std::optional< uint64_t >	remaining_operations () const
	Retrieves the number of remaining operations if this is a stateful private key.

virtual bool	stateful_operation () const

std::vector< uint8_t >	subject_public_key () const

virtual bool	supports_operation (PublicKeyOperation op) const =0

bool	supports_operation (PublicKeyOperation op) const override

Static Public Member Functions
static std::unique_ptr< Hybrid_KEM_PrivateKey >	generate_from_group (Group_Params group, RandomNumberGenerator &rng)

static std::unique_ptr< Hybrid_KEM_PublicKey >	load_for_group (Group_Params group, std::span< const uint8_t > concatenated_public_values)

Protected Attributes
std::vector< std::unique_ptr< Public_Key > >	m_public_keys

Detailed Description

Composes a number of private keys for hybrid key agreement as defined in this IETF draft: https://datatracker.ietf.org/doc/html/draft-ietf-tls-hybrid-design-04

Definition at line 85 of file hybrid_public_key.h.

Constructor & Destructor Documentation

◆ Hybrid_KEM_PrivateKey()

Botan::TLS::Hybrid_KEM_PrivateKey::Hybrid_KEM_PrivateKey ( std::vector< std::unique_ptr< Private_Key > > private_keys )

Definition at line 340 of file hybrid_public_key.cpp.

                                                                                      :
      Hybrid_KEM_PublicKey(extract_public_keys(sks)) {
   BOTAN_ARG_CHECK(sks.size() >= 2, "List of private keys must include at least two keys");
   BOTAN_ARG_CHECK(std::all_of(sks.begin(),
                               sks.end(),
                               [](const auto& sk) {
                                  return sk->supports_operation(PublicKeyOperation::KeyEncapsulation) ||
                                         sk->supports_operation(PublicKeyOperation::KeyAgreement);
                               }),
                   "Some provided private key is not compatible with this hybrid wrapper");
 
   std::transform(
      sks.begin(), sks.end(), std::back_inserter(m_private_keys), [](auto& key) -> std::unique_ptr<Private_Key> {
         if(key->supports_operation(PublicKeyOperation::KeyAgreement) &&
            !key->supports_operation(PublicKeyOperation::KeyEncapsulation)) {
            auto ka_key = dynamic_cast<PK_Key_Agreement_Key*>(key.get());
            BOTAN_ASSERT_NONNULL(ka_key);
            (void)key.release();
            return std::make_unique<KEX_to_KEM_Adapter_PrivateKey>(std::unique_ptr<PK_Key_Agreement_Key>(ka_key));
         } else {
            return std::move(key);
         }
      });
}

References BOTAN_ARG_CHECK.

Member Function Documentation

◆ algo_name() [1/2]

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

pure virtualinherited

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(), Botan::Asymmetric_Key::get_int_field(), Botan::Asymmetric_Key::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().

◆ algo_name() [2/2]

std::string Botan::TLS::Hybrid_KEM_PublicKey::algo_name ( ) const

overridevirtualinherited

Get the name of the underlying public key scheme.

Returns: name of the public key scheme

Implements Botan::Asymmetric_Key.

Definition at line 195 of file hybrid_public_key.cpp.

                                                {
   std::ostringstream algo_name("Hybrid(");
   for(size_t i = 0; i < m_public_keys.size(); ++i) {
      if(i > 0) {
         algo_name << ",";
      }
      algo_name << m_public_keys[i]->algo_name();
   }
   algo_name << ")";
   return algo_name.str();
}

◆ algorithm_identifier() [1/2]

virtual AlgorithmIdentifier Botan::Public_Key::algorithm_identifier ( ) const

pure virtualinherited

◆ algorithm_identifier() [2/2]

AlgorithmIdentifier Botan::TLS::Hybrid_KEM_PublicKey::algorithm_identifier ( ) const

overridevirtualinherited

Returns: X.509 AlgorithmIdentifier for this key

Implements Botan::Public_Key.

Definition at line 219 of file hybrid_public_key.cpp.

                                                                     {
   throw Botan::Not_Implemented("Hybrid keys don't have an algorithm identifier");
}

◆ check_key()

bool Botan::TLS::Hybrid_KEM_PrivateKey::check_key	(	RandomNumberGenerator &	rng,
		bool	strong ) const

overridevirtual

Implements Botan::Public_Key.

Definition at line 373 of file hybrid_public_key.cpp.

                                                                                   {
   return reduce(m_public_keys, true, [&](bool ckr, const auto& key) { return ckr && key->check_key(rng, strong); });
}

References Botan::TLS::Hybrid_KEM_PublicKey::check_key(), Botan::TLS::Hybrid_KEM_PublicKey::m_public_keys, and Botan::reduce().

◆ create_decryption_op()

std::unique_ptr< PK_Ops::Decryption > Botan::Private_Key::create_decryption_op	(	RandomNumberGenerator &	rng,
		std::string_view	params,
		std::string_view	provider ) const

virtualinherited

This is an internal library function exposed on key types. In all cases applications should use wrappers in pubkey.h

Return an decryption operation for this key/params or throw

Parameters

rng	a random number generator. The PK_Op may maintain a reference to the RNG and use it many times. The rng must outlive any operations which reference it.
params	additional parameters
provider	the provider to use

Reimplemented in Botan::ElGamal_PrivateKey, Botan::RSA_PrivateKey, and Botan::SM2_PrivateKey.

Definition at line 111 of file pk_keys.cpp.

                                                                                              {
   throw Lookup_Error(fmt("{} does not support decryption", algo_name()));
}

References Botan::Asymmetric_Key::algo_name(), and Botan::fmt().

Referenced by Botan::PK_Decryptor_EME::PK_Decryptor_EME().

◆ create_encryption_op()

std::unique_ptr< PK_Ops::Encryption > Botan::Public_Key::create_encryption_op	(	RandomNumberGenerator &	rng,
		std::string_view	params,
		std::string_view	provider ) const

virtualinherited

This is an internal library function exposed on key types. In almost all cases applications should use wrappers in pubkey.h

Return an encryption operation for this key/params or throw

Parameters

rng	a random number generator. The PK_Op may maintain a reference to the RNG and use it many times. The rng must outlive any operations which reference it.
params	additional parameters
provider	the provider to use

Reimplemented in Botan::ElGamal_PublicKey, Botan::RSA_PublicKey, and Botan::SM2_PublicKey.

Definition at line 90 of file pk_keys.cpp.

                                                                                             {
   throw Lookup_Error(fmt("{} does not support encryption", algo_name()));
}

References Botan::Asymmetric_Key::algo_name(), and Botan::fmt().

Referenced by Botan::PK_Encryptor_EME::PK_Encryptor_EME().

◆ create_kem_decryption_op()

std::unique_ptr< Botan::PK_Ops::KEM_Decryption > Botan::TLS::Hybrid_KEM_PrivateKey::create_kem_decryption_op	(	RandomNumberGenerator &	rng,
		std::string_view	params,
		std::string_view	provider = "base" ) const

overridevirtual

This is an internal library function exposed on key types. In all cases applications should use wrappers in pubkey.h

Return a KEM decryption operation for this key/params or throw

Parameters

rng	a random number generator. The PK_Op may maintain a reference to the RNG and use it many times. The rng must outlive any operations which reference it.
params	additional parameters
provider	the provider to use

Reimplemented from Botan::Private_Key.

Definition at line 419 of file hybrid_public_key.cpp.

                                                                                  {
   return std::make_unique<Hybrid_KEM_Decryption>(*this, rng, kdf, provider);
}

◆ create_kem_encryption_op() [1/2]

std::unique_ptr< Botan::PK_Ops::KEM_Encryption > Botan::TLS::Hybrid_KEM_PublicKey::create_kem_encryption_op	(	std::string_view	params,
		std::string_view	provider = "base" ) const

overridevirtualinherited

This is an internal library function exposed on key types. In almost all cases applications should use wrappers in pubkey.h

Return a KEM encryption operation for this key/params or throw

Parameters

params	additional parameters
provider	the provider to use

Reimplemented from Botan::Public_Key.

Definition at line 310 of file hybrid_public_key.cpp.

                                                      {
   return std::make_unique<Hybrid_KEM_Encryption_Operation>(*this, kdf, provider);
}

◆ create_kem_encryption_op() [2/2]

std::unique_ptr< PK_Ops::KEM_Encryption > Botan::Public_Key::create_kem_encryption_op	(	std::string_view	params,
		std::string_view	provider ) const

virtualinherited

This is an internal library function exposed on key types. In almost all cases applications should use wrappers in pubkey.h

Return a KEM encryption operation for this key/params or throw

Parameters

params	additional parameters
provider	the provider to use

Reimplemented in Botan::TLS::Hybrid_KEM_PublicKey, Botan::TLS::KEX_to_KEM_Adapter_PublicKey, Botan::FrodoKEM_PublicKey, Botan::Kyber_PublicKey, Botan::McEliece_PublicKey, and Botan::RSA_PublicKey.

Definition at line 96 of file pk_keys.cpp.

                                                                                                     {
   throw Lookup_Error(fmt("{} does not support KEM encryption", algo_name()));
}

References Botan::Asymmetric_Key::algo_name(), and Botan::fmt().

Referenced by Botan::PK_KEM_Encryptor::PK_KEM_Encryptor().

◆ create_key_agreement_op()

std::unique_ptr< PK_Ops::Key_Agreement > Botan::Private_Key::create_key_agreement_op	(	RandomNumberGenerator &	rng,
		std::string_view	params,
		std::string_view	provider ) const

virtualinherited

This is an internal library function exposed on key types. In all cases applications should use wrappers in pubkey.h

Return a key agreement operation for this key/params or throw

Parameters

rng	a random number generator. The PK_Op may maintain a reference to the RNG and use it many times. The rng must outlive any operations which reference it.
params	additional parameters
provider	the provider to use

Reimplemented in Botan::Curve25519_PrivateKey, Botan::X448_PrivateKey, Botan::DH_PrivateKey, and Botan::ECDH_PrivateKey.

Definition at line 129 of file pk_keys.cpp.

                                                                                                    {
   throw Lookup_Error(fmt("{} does not support key agreement", algo_name()));
}

References Botan::Asymmetric_Key::algo_name(), and Botan::fmt().

Referenced by Botan::PK_Key_Agreement::PK_Key_Agreement().

◆ create_signature_op()

std::unique_ptr< PK_Ops::Signature > Botan::Private_Key::create_signature_op	(	RandomNumberGenerator &	rng,
		std::string_view	params,
		std::string_view	provider ) const

virtualinherited

This is an internal library function exposed on key types. In all cases applications should use wrappers in pubkey.h

Return a signature operation for this key/params or throw

Parameters

rng	a random number generator. The PK_Op may maintain a reference to the RNG and use it many times. The rng must outlive any operations which reference it.
params	additional parameters
provider	the provider to use

Reimplemented in Botan::Dilithium_PrivateKey, Botan::XMSS_PrivateKey, Botan::TPM_PrivateKey, Botan::Ed448_PrivateKey, Botan::DSA_PrivateKey, Botan::ECDSA_PrivateKey, Botan::ECGDSA_PrivateKey, Botan::ECKCDSA_PrivateKey, Botan::Ed25519_PrivateKey, Botan::GOST_3410_PrivateKey, Botan::RSA_PrivateKey, Botan::SM2_PrivateKey, and Botan::SphincsPlus_PrivateKey.

Definition at line 123 of file pk_keys.cpp.

                                                                                            {
   throw Lookup_Error(fmt("{} does not support signatures", algo_name()));
}

References Botan::Asymmetric_Key::algo_name(), and Botan::fmt().

Referenced by Botan::PK_Signer::PK_Signer().

◆ create_verification_op()

std::unique_ptr< PK_Ops::Verification > Botan::Public_Key::create_verification_op	(	std::string_view	params,
		std::string_view	provider ) const

virtualinherited

This is an internal library function exposed on key types. In all cases applications should use wrappers in pubkey.h

Return a verification operation for this key/params or throw

Parameters

params	additional parameters
provider	the provider to use

Reimplemented in Botan::Ed448_PublicKey, Botan::Dilithium_PublicKey, Botan::DSA_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, Botan::Ed25519_PublicKey, Botan::GOST_3410_PublicKey, Botan::RSA_PublicKey, Botan::SM2_PublicKey, Botan::SphincsPlus_PublicKey, and Botan::XMSS_PublicKey.

Definition at line 101 of file pk_keys.cpp.

                                                                                                 {
   throw Lookup_Error(fmt("{} does not support verification", algo_name()));
}

References Botan::Asymmetric_Key::algo_name(), and Botan::fmt().

Referenced by Botan::PK_Verifier::PK_Verifier().

◆ create_x509_verification_op()

std::unique_ptr< PK_Ops::Verification > Botan::Public_Key::create_x509_verification_op	(	const AlgorithmIdentifier &	signature_algorithm,
		std::string_view	provider ) const

virtualinherited

This is an internal library function exposed on key types. In all cases applications should use wrappers in pubkey.h

Return a verification operation for this combination of key and signature algorithm or throw.

Parameters

signature_algorithm	is the X.509 algorithm identifier encoding the padding scheme and hash hash function used in the signature if applicable.
provider	the provider to use

Reimplemented in Botan::RSA_PublicKey, Botan::XMSS_PublicKey, Botan::Ed448_PublicKey, Botan::Dilithium_PublicKey, Botan::DSA_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, Botan::Ed25519_PublicKey, Botan::GOST_3410_PublicKey, and Botan::SphincsPlus_PublicKey.

Definition at line 106 of file pk_keys.cpp.

                                                                                                      {
   throw Lookup_Error(fmt("{} does not support X.509 verification", algo_name()));
}

References Botan::Asymmetric_Key::algo_name(), and Botan::fmt().

Referenced by Botan::PK_Verifier::PK_Verifier().

◆ default_x509_signature_format()

virtual Signature_Format Botan::Public_Key::default_x509_signature_format ( ) const

inlinevirtualinherited

Reimplemented in Botan::GOST_3410_PublicKey.

Definition at line 190 of file pk_keys.h.

                                                                     {
         return (this->message_parts() >= 2) ? Signature_Format::DerSequence : Signature_Format::Standard;
      }

Referenced by Botan::X509_Object::choose_sig_format(), and Botan::PK_Verifier::PK_Verifier().

◆ estimated_strength() [1/2]

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

pure virtualinherited

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.

◆ estimated_strength() [2/2]

size_t Botan::TLS::Hybrid_KEM_PublicKey::estimated_strength ( ) const

overridevirtualinherited

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

Implements Botan::Asymmetric_Key.

Definition at line 207 of file hybrid_public_key.cpp.

                                                      {
   return m_estimated_strength;
}

◆ fingerprint_private()

std::string Botan::Private_Key::fingerprint_private ( std::string_view alg ) const

inherited

Returns: Hash of the PKCS #8 encoding for this key object

Definition at line 86 of file pk_keys.cpp.

                                                                         {
   return create_hex_fingerprint(private_key_bits(), hash_algo);
}

References Botan::create_hex_fingerprint(), and Botan::Private_Key::private_key_bits().

Referenced by Botan::Certificate_Store_In_SQL::find_certs_for_key(), Botan::Certificate_Store_In_SQL::insert_key(), and Botan::Certificate_Store_In_SQL::remove_key().

◆ fingerprint_public()

std::string Botan::Public_Key::fingerprint_public ( std::string_view alg = "SHA-256" ) const

inherited

Returns: Hash of the subject public key

Definition at line 79 of file pk_keys.cpp.

                                                                       {
   return create_hex_fingerprint(subject_public_key(), hash_algo);
}

References Botan::create_hex_fingerprint(), and Botan::Public_Key::subject_public_key().

◆ generate_another() [1/2]

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

pure virtualinherited

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.

◆ generate_another() [2/2]

std::unique_ptr< Private_Key > Botan::TLS::Hybrid_KEM_PublicKey::generate_another ( RandomNumberGenerator & rng ) const

finalvirtualinherited

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.

Implements Botan::Asymmetric_Key.

Definition at line 253 of file hybrid_public_key.cpp.

                                                                                                  {
   std::vector<std::unique_ptr<Private_Key>> new_private_keys;
   std::transform(
      m_public_keys.begin(), m_public_keys.end(), std::back_inserter(new_private_keys), [&](const auto& public_key) {
         return public_key->generate_another(rng);
      });
   return std::make_unique<Hybrid_KEM_PrivateKey>(std::move(new_private_keys));
}

◆ generate_from_group()

std::unique_ptr< Hybrid_KEM_PrivateKey > Botan::TLS::Hybrid_KEM_PrivateKey::generate_from_group	(	Group_Params	group,
		RandomNumberGenerator &	rng )

static

Generate a hybrid private key for the given TLS code point.

Definition at line 329 of file hybrid_public_key.cpp.

                                                                                                              {
   const auto algo_spec = algorithm_specs_for_group(group);
   std::vector<std::unique_ptr<Private_Key>> private_keys;
   private_keys.reserve(algo_spec.size());
   for(const auto& spec : algo_spec) {
      private_keys.push_back(create_private_key(spec.first, rng, spec.second));
   }
   return std::make_unique<Hybrid_KEM_PrivateKey>(std::move(private_keys));
}

References Botan::create_private_key().

Referenced by Botan::TLS::Callbacks::tls_kem_generate_key().

◆ get_int_field()

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

virtualinherited

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 Botan::Asymmetric_Key::algo_name().

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

◆ get_oid()

OID Botan::Public_Key::get_oid ( ) const

inlineinherited

Deprecated version of object_identifier

Definition at line 132 of file pk_keys.h.

132{ return this->object_identifier(); }

Botan::Asymmetric_Key::object_identifier

virtual OID object_identifier() const

Definition pk_keys.cpp:22

◆ key_length() [1/2]

virtual size_t Botan::Public_Key::key_length ( ) const

pure virtualinherited

Return an integer value best approximating the length of the primary security parameter. For example for RSA this will be the size of the modulus, for ECDSA the size of the ECC group, and for McEliece the size of the code will be returned.

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.

Referenced by Botan::TLS::Policy::check_peer_key_acceptable().

◆ key_length() [2/2]

size_t Botan::TLS::Hybrid_KEM_PublicKey::key_length ( ) const

overridevirtualinherited

Return an integer value best approximating the length of the primary security parameter. For example for RSA this will be the size of the modulus, for ECDSA the size of the ECC group, and for McEliece the size of the code will be returned.

Implements Botan::Public_Key.

Definition at line 211 of file hybrid_public_key.cpp.

                                              {
   return m_key_length;
}

◆ load_for_group()

std::unique_ptr< Hybrid_KEM_PublicKey > Botan::TLS::Hybrid_KEM_PublicKey::load_for_group	(	Group_Params	group,
		std::span< const uint8_t >	concatenated_public_values )

staticinherited

Definition at line 147 of file hybrid_public_key.cpp.

                                                                          {
   const auto public_value_lengths = public_value_lengths_for_group(group);
   auto alg_ids = algorithm_identifiers_for_group(group);
   BOTAN_ASSERT_NOMSG(public_value_lengths.size() == alg_ids.size());
 
   const auto expected_public_values_length =
      reduce(public_value_lengths, size_t(0), [](size_t acc, size_t len) { return acc + len; });
   BOTAN_ARG_CHECK(expected_public_values_length == concatenated_public_values.size(),
                   "Concatenated public values have an unexpected length");
 
   BufferSlicer public_value_slicer(concatenated_public_values);
   std::vector<std::unique_ptr<Public_Key>> pks;
   for(size_t idx = 0; idx < alg_ids.size(); ++idx) {
      pks.emplace_back(load_public_key(alg_ids[idx], public_value_slicer.take(public_value_lengths[idx])));
   }
   BOTAN_ASSERT_NOMSG(public_value_slicer.empty());
   return std::make_unique<Hybrid_KEM_PublicKey>(std::move(pks));
}

References BOTAN_ARG_CHECK, BOTAN_ASSERT_NOMSG, Botan::BufferSlicer::empty(), Botan::load_public_key(), Botan::reduce(), and Botan::BufferSlicer::take().

Referenced by Botan::TLS::Callbacks::tls_kem_encapsulate().

◆ message_part_size()

virtual size_t Botan::Public_Key::message_part_size ( ) const

inlinevirtualinherited

Returns how large each of the message parts refered to by message_parts() is

This function is public but applications should have few reasons to ever call this.

Returns: size of the message parts in bits

Reimplemented in Botan::DSA_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, Botan::GOST_3410_PublicKey, and Botan::SM2_PublicKey.

Definition at line 188 of file pk_keys.h.

188{ return 0; }

Referenced by Botan::PK_Signer::PK_Signer(), Botan::PK_Verifier::PK_Verifier(), and Botan::PK_Verifier::PK_Verifier().

◆ message_parts()

virtual size_t Botan::Public_Key::message_parts ( ) const

inlinevirtualinherited

Returns more than 1 if the output of this algorithm (ciphertext, signature) should be treated as more than one value. This is used for algorithms like DSA and ECDSA, where the (r,s) output pair can be encoded as either a plain binary list or a TLV tagged DER encoding depending on the protocol.

This function is public but applications should have few reasons to ever call this.

Returns: number of message parts

Reimplemented in Botan::DSA_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, Botan::GOST_3410_PublicKey, and Botan::SM2_PublicKey.

Definition at line 177 of file pk_keys.h.

177{ return 1; }

Referenced by Botan::PK_Signer::PK_Signer(), Botan::PK_Verifier::PK_Verifier(), and Botan::PK_Verifier::PK_Verifier().

◆ object_identifier()

OID Botan::Asymmetric_Key::object_identifier ( ) const

virtualinherited

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()));
   }
}

References Botan::Asymmetric_Key::algo_name(), Botan::fmt(), and Botan::OID::from_string().

◆ pkcs8_algorithm_identifier()

virtual AlgorithmIdentifier Botan::Private_Key::pkcs8_algorithm_identifier ( ) const

inlinevirtualinherited

Returns: PKCS #8 AlgorithmIdentifier for this key Might be different from the X.509 identifier, but normally is not

Reimplemented in Botan::GOST_3410_PrivateKey.

Definition at line 285 of file pk_keys.h.

285{ return algorithm_identifier(); }

Botan::Public_Key::algorithm_identifier

virtual AlgorithmIdentifier algorithm_identifier() const =0

Referenced by Botan::Private_Key::private_key_info().

◆ private_key_bits()

secure_vector< uint8_t > Botan::TLS::Hybrid_KEM_PrivateKey::private_key_bits ( ) const

overridevirtual

Returns: BER encoded private key bits

Implements Botan::Private_Key.

Definition at line 365 of file hybrid_public_key.cpp.

                                                                     {
   throw Not_Implemented("Hybrid private keys cannot be serialized");
}

◆ private_key_info()

secure_vector< uint8_t > Botan::Private_Key::private_key_info ( ) const

inherited

Returns: PKCS #8 private key encoding for this key object

Definition at line 60 of file pk_keys.cpp.

                                                           {
   const size_t PKCS8_VERSION = 0;
 
   return DER_Encoder()
      .start_sequence()
      .encode(PKCS8_VERSION)
      .encode(pkcs8_algorithm_identifier())
      .encode(private_key_bits(), ASN1_Type::OctetString)
      .end_cons()
      .get_contents();
}

References Botan::DER_Encoder::encode(), Botan::DER_Encoder::end_cons(), Botan::DER_Encoder::get_contents(), Botan::OctetString, Botan::Private_Key::pkcs8_algorithm_identifier(), Botan::Private_Key::private_key_bits(), and Botan::DER_Encoder::start_sequence().

Referenced by Botan::PKCS8::BER_encode(), Botan::PKCS8::BER_encode_encrypted_pbkdf_iter(), Botan::PKCS8::BER_encode_encrypted_pbkdf_msec(), and Botan::PKCS8::PEM_encode().

◆ private_keys()

const auto & Botan::TLS::Hybrid_KEM_PrivateKey::private_keys ( ) const

inline

Definition at line 105 of file hybrid_public_key.h.

105{ return m_private_keys; }

◆ public_key()

std::unique_ptr< Public_Key > Botan::TLS::Hybrid_KEM_PrivateKey::public_key ( ) const

overridevirtual

Allocate a new object for the public key associated with this private key.

Returns: public key

Implements Botan::Private_Key.

Definition at line 369 of file hybrid_public_key.cpp.

                                                                  {
   return std::make_unique<Hybrid_KEM_PublicKey>(extract_public_keys(m_private_keys));
}

◆ public_key_bits() [1/2]

virtual std::vector< uint8_t > Botan::Public_Key::public_key_bits ( ) const

pure virtualinherited

◆ public_key_bits() [2/2]

std::vector< uint8_t > Botan::TLS::Hybrid_KEM_PublicKey::public_key_bits ( ) const

overridevirtualinherited

Returns: BER encoded public key bits

Implements Botan::Public_Key.

Definition at line 223 of file hybrid_public_key.cpp.

                                                               {
   // Technically, that's not really correct. The docstring for public_key_bits()
   // states that it should return a BER-encoding of the public key.
   //
   // TODO: Perhaps add something like Public_Key::raw_public_key_bits() to
   //       better reflect what we need here.
   return public_value();
}

◆ public_keys()

const auto & Botan::TLS::Hybrid_KEM_PublicKey::public_keys ( ) const

inlineinherited

Definition at line 68 of file hybrid_public_key.h.

68{ return m_public_keys; }

◆ public_value()

std::vector< uint8_t > Botan::TLS::Hybrid_KEM_PublicKey::public_value ( ) const

inherited

Definition at line 232 of file hybrid_public_key.cpp.

                                                            {
   // draft-ietf-tls-hybrid-design-06 3.2
   //   The values are directly concatenated, without any additional encoding
   //   or length fields; this assumes that the representation and length of
   //   elements is fixed once the algorithm is fixed.  If concatenation were
   //   to be used with values that are not fixed-length, a length prefix or
   //   other unambiguous encoding must be used to ensure that the composition
   //   of the two values is injective.
   return reduce(m_public_keys, std::vector<uint8_t>(), [](auto pkb, const auto& key) {
      // Technically, this is not correct! `public_key_bits()` is meant to
      // return a BER-encoded public key. For (e.g.) Kyber, that contract is
      // broken: It returns the raw encoding as used in the reference
      // implementation.
      //
      // TODO: Provide something like Public_Key::raw_public_key_bits() to
      //       reflect that difference. Also: Key agreement keys could return
      //       their raw public value there.
      return concat(pkb, key->public_key_bits());
   });
}

References Botan::concat(), and Botan::reduce().

◆ raw_private_key_bits()

secure_vector< uint8_t > Botan::Private_Key::raw_private_key_bits ( ) const

virtualinherited

Returns: binary private key bits, with no additional encoding

Note: some algorithms (for example RSA) do not have an obvious encoding for this value due to having many different values, and thus not implement this function. The default implementation throws Not_Implemented

Reimplemented in Botan::EC_PrivateKey, Botan::Curve25519_PrivateKey, Botan::Ed448_PrivateKey, Botan::X448_PrivateKey, Botan::DH_PrivateKey, Botan::Dilithium_PrivateKey, Botan::DSA_PrivateKey, Botan::Ed25519_PrivateKey, Botan::ElGamal_PrivateKey, Botan::FrodoKEM_PrivateKey, Botan::Kyber_PrivateKey, and Botan::SphincsPlus_PrivateKey.

Definition at line 72 of file pk_keys.cpp.

                                                               {
   throw Not_Implemented(algo_name() + " does not implement raw_private_key_bits");
}

References Botan::Asymmetric_Key::algo_name().

◆ remaining_operations()

virtual std::optional< uint64_t > Botan::Private_Key::remaining_operations ( ) const

inlinevirtualinherited

Retrieves the number of remaining operations if this is a stateful private key.

Returns: the number of remaining operations or std::nullopt if not applicable.

Reimplemented in Botan::XMSS_PrivateKey.

Definition at line 298 of file pk_keys.h.

298{ return std::nullopt; }

◆ stateful_operation()

virtual bool Botan::Private_Key::stateful_operation ( ) const

inlinevirtualinherited

Indicates if this key is stateful, ie that performing a private key operation requires updating the key storage.

Reimplemented in Botan::XMSS_PrivateKey.

Definition at line 291 of file pk_keys.h.

291{ return false; }

◆ subject_public_key()

std::vector< uint8_t > Botan::Public_Key::subject_public_key ( ) const

inherited

Returns: X.509 subject key encoding for this key object

Definition at line 48 of file pk_keys.cpp.

                                                        {
   std::vector<uint8_t> output;
 
   DER_Encoder(output)
      .start_sequence()
      .encode(algorithm_identifier())
      .encode(public_key_bits(), ASN1_Type::BitString)
      .end_cons();
 
   return output;
}

References Botan::Public_Key::algorithm_identifier(), Botan::BitString, Botan::DER_Encoder::encode(), Botan::DER_Encoder::end_cons(), Botan::Public_Key::public_key_bits(), and Botan::DER_Encoder::start_sequence().

Referenced by Botan::X509::BER_encode(), Botan::PKCS10_Request::create(), Botan::Public_Key::fingerprint_public(), and Botan::X509::PEM_encode().

◆ supports_operation() [1/2]

virtual bool Botan::Asymmetric_Key::supports_operation ( PublicKeyOperation op ) const

pure virtualinherited

Return true if this key could be used for the specified type of operation.

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::Key_Constraints::compatible_with().

◆ supports_operation() [2/2]

bool Botan::TLS::Hybrid_KEM_PublicKey::supports_operation ( PublicKeyOperation op ) const

overridevirtualinherited

Return true if this key could be used for the specified type of operation.

Implements Botan::Asymmetric_Key.

Definition at line 262 of file hybrid_public_key.cpp.

                                                                         {
   return PublicKeyOperation::KeyEncapsulation == op;
}

References Botan::KeyEncapsulation.

Member Data Documentation

◆ m_public_keys

std::vector<std::unique_ptr<Public_Key> > Botan::TLS::Hybrid_KEM_PublicKey::m_public_keys

protectedinherited

Definition at line 71 of file hybrid_public_key.h.

Referenced by check_key(), and Botan::TLS::Hybrid_KEM_PublicKey::Hybrid_KEM_PublicKey().

The documentation for this class was generated from the following files:

src/lib/tls/tls13_pqc/hybrid_public_key.h
src/lib/tls/tls13_pqc/hybrid_public_key.cpp

Public Member Functions

Static Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ Hybrid_KEM_PrivateKey()

Member Function Documentation

◆ algo_name() [1/2]

◆ algo_name() [2/2]

◆ algorithm_identifier() [1/2]

◆ algorithm_identifier() [2/2]

◆ check_key()

◆ create_decryption_op()

◆ create_encryption_op()

◆ create_kem_decryption_op()

◆ create_kem_encryption_op() [1/2]

◆ create_kem_encryption_op() [2/2]

◆ create_key_agreement_op()

◆ create_signature_op()

◆ create_verification_op()

◆ create_x509_verification_op()

◆ default_x509_signature_format()

◆ estimated_strength() [1/2]

◆ estimated_strength() [2/2]

◆ fingerprint_private()

◆ fingerprint_public()

◆ generate_another() [1/2]

◆ generate_another() [2/2]

◆ generate_from_group()

◆ get_int_field()

◆ get_oid()

◆ key_length() [1/2]

◆ key_length() [2/2]

◆ load_for_group()

◆ message_part_size()

◆ message_parts()

◆ object_identifier()

◆ pkcs8_algorithm_identifier()

◆ private_key_bits()

◆ private_key_info()

◆ private_keys()

◆ public_key()

◆ public_key_bits() [1/2]

◆ public_key_bits() [2/2]

◆ public_keys()

◆ public_value()

◆ raw_private_key_bits()

◆ remaining_operations()

◆ stateful_operation()

◆ subject_public_key()

◆ supports_operation() [1/2]

◆ supports_operation() [2/2]

Member Data Documentation

◆ m_public_keys