#include <tpm2_key.h>

Inheritance diagram for Botan::TPM2::PrivateKey:

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

virtual AlgorithmIdentifier	algorithm_identifier () const =0

virtual bool	check_key (RandomNumberGenerator &rng, bool strong) const =0

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

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

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

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

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

OID	get_oid () const

Object &	handles ()

const Object &	handles () const

bool	is_parent () const

virtual size_t	key_length () const =0

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

virtual std::unique_ptr< Public_Key >	public_key () const =0

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

secure_vector< uint8_t >	raw_private_key_bits () const override

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

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

const SessionBundle &	sessions () const

virtual bool	stateful_operation () const

std::vector< uint8_t >	subject_public_key () const

virtual bool	supports_operation (PublicKeyOperation op) const =0

Static Public Member Functions
static std::unique_ptr< PrivateKey >	create_transient_from_template (const std::shared_ptr< Context > &ctx, const SessionBundle &sessions, ESYS_TR parent, const TPMT_PUBLIC &key_template, const TPM2B_SENSITIVE_CREATE &sensitive_data)

static std::unique_ptr< PrivateKey >	load_persistent (const std::shared_ptr< Context > &ctx, TPM2_HANDLE persistent_object_handle, std::span< const uint8_t > auth_value, const SessionBundle &sessions)

static std::unique_ptr< PrivateKey >	load_transient (const std::shared_ptr< Context > &ctx, std::span< const uint8_t > auth_value, const TPM2::PrivateKey &parent, std::span< const uint8_t > public_blob, std::span< const uint8_t > private_blob, const SessionBundle &sessions)

Protected Member Functions
	PrivateKey (Object handle, SessionBundle sessions, std::span< const uint8_t > private_blob={})

Static Protected Member Functions
static std::unique_ptr< PrivateKey >	create (Object handles, const SessionBundle &sessions, const TPM2B_PUBLIC *public_info, std::span< const uint8_t > private_blob)

Detailed Description

This wraps a private key that is hosted in a TPM 2.0 device. This class allows performing private-key operations on the TPM. Namely signing and decrypting data.

Note that there are two types of keys: persistent and transient. Persistent keys are stored in the TPM's NVRAM and can be loaded at any time. Transient keys are loaded by the application from an encrypted private blob that is only readable by the TPM that created it. Once the key is loaded, the application can use it as if it were a persistent key. Once the key is destructed, the transient memory on the TPM is cleared.

Applications may persist transient keys in the TPM's NVRAM by using the TPM2_Context::persist() method. This allows the key to be loaded at a later time without the need to provide the encrypted private blob. Similarly, persistent keys may be permanently destroyed using TPM2_Context::evict().

To obtain the public and private blobs of a transient key, use the raw_public_key_bits() and raw_private_key_bits() methods, respectively.

The class does not provide public constructors, but instead provides static methods to obtain a private key handle from a TPM.

Definition at line 139 of file tpm2_key.h.

Constructor & Destructor Documentation

◆ PrivateKey()

Botan::TPM2::PrivateKey::PrivateKey	(	Object	handle,
		SessionBundle	sessions,
		std::span< const uint8_t >	private_blob = {} )

inlineprotected

Definition at line 229 of file tpm2_key.h.

                                                                                              {}) :
            m_handle(std::move(handle)),
            m_sessions(std::move(sessions)),
            m_private_blob(private_blob.begin(), private_blob.end()) {}

Member Function Documentation

◆ algo_name()

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::DH_PublicKey, Botan::Dilithium_PublicKey, Botan::DSA_PublicKey, Botan::ECDH_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, Botan::Ed25519_PublicKey, Botan::Ed448_PublicKey, Botan::ElGamal_PublicKey, Botan::FrodoKEM_PublicKey, Botan::GOST_3410_PublicKey, Botan::HSS_LMS_PublicKey, Botan::Kyber_PublicKey, Botan::McEliece_PublicKey, Botan::RSA_PublicKey, Botan::SM2_PublicKey, Botan::SphincsPlus_PublicKey, Botan::TLS::Hybrid_KEM_PublicKey, Botan::TLS::KEX_to_KEM_Adapter_PublicKey, Botan::TPM2::EC_PrivateKey, Botan::TPM2::EC_PublicKey, Botan::TPM_PrivateKey, Botan::X25519_PublicKey, Botan::X448_PublicKey, and Botan::XMSS_PublicKey.

Referenced by Botan::PKCS8::BER_encode(), botan_pubkey_sm2_compute_za(), Botan::TLS::Policy::check_peer_key_acceptable(), Botan::TLS::Handshake_State::choose_sig_format(), Botan::X509_Object::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().

◆ algorithm_identifier()

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

pure virtualinherited

◆ check_key()

virtual bool Botan::Public_Key::check_key	(	RandomNumberGenerator &	rng,
		bool	strong ) const

pure virtualinherited

◆ create()

std::unique_ptr< PrivateKey > Botan::TPM2::PrivateKey::create	(	Object	handles,
		const SessionBundle &	sessions,
		const TPM2B_PUBLIC *	public_info,
		std::span< const uint8_t >	private_blob )

staticprotected

Definition at line 291 of file tpm2_key.cpp.

                                                                                                     {
   if(!public_info) {
      public_info = handles._public_info(sessions).pub.get();
   }
 
#if defined(BOTAN_HAS_TPM2_RSA_ADAPTER)
   if(public_info->publicArea.type == TPM2_ALG_RSA) {
      return std::unique_ptr<RSA_PrivateKey>(
         new RSA_PrivateKey(std::move(handles), sessions, public_info, private_blob));
   }
#endif
 
#if defined(BOTAN_HAS_TPM2_ECC_ADAPTER)
   if(public_info->publicArea.type == TPM2_ALG_ECC) {
      return std::unique_ptr<EC_PrivateKey>(new EC_PrivateKey(std::move(handles), sessions, public_info, private_blob));
   }
#endif
 
   throw Not_Implemented(Botan::fmt("Loaded a {} private key of an unsupported type",
                                    handles.has_persistent_handle() ? "persistent" : "transient"));
}

References Botan::TPM2::Object::_public_info(), Botan::fmt(), handles(), Botan::TPM2::Object::has_persistent_handle(), Botan::TPM2::PublicInfo::pub, and sessions().

Referenced by create_transient_from_template(), load_persistent(), and load_transient().

◆ 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, Botan::SM2_PrivateKey, and Botan::TPM2::RSA_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, Botan::SM2_PublicKey, and Botan::TPM2::RSA_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< PK_Ops::KEM_Decryption > Botan::Private_Key::create_kem_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 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 in Botan::FrodoKEM_PrivateKey, Botan::Kyber_PrivateKey, Botan::McEliece_PrivateKey, Botan::RSA_PrivateKey, Botan::TLS::Hybrid_KEM_PrivateKey, and Botan::TLS::KEX_to_KEM_Adapter_PrivateKey.

Definition at line 117 of file pk_keys.cpp.

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

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

Referenced by Botan::PK_KEM_Decryptor::PK_KEM_Decryptor().

◆ create_kem_encryption_op()

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::FrodoKEM_PublicKey, Botan::Kyber_PublicKey, Botan::McEliece_PublicKey, Botan::RSA_PublicKey, Botan::TLS::Hybrid_KEM_PublicKey, and Botan::TLS::KEX_to_KEM_Adapter_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::DH_PrivateKey, Botan::ECDH_PrivateKey, Botan::X25519_PrivateKey, and Botan::X448_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::DSA_PrivateKey, Botan::ECDSA_PrivateKey, Botan::ECGDSA_PrivateKey, Botan::ECKCDSA_PrivateKey, Botan::Ed25519_PrivateKey, Botan::Ed448_PrivateKey, Botan::GOST_3410_PrivateKey, Botan::HSS_LMS_PrivateKey, Botan::RSA_PrivateKey, Botan::SM2_PrivateKey, Botan::SphincsPlus_PrivateKey, Botan::TPM2::EC_PrivateKey, Botan::TPM2::RSA_PrivateKey, Botan::TPM_PrivateKey, and Botan::XMSS_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_transient_from_template()

std::unique_ptr< PrivateKey > Botan::TPM2::PrivateKey::create_transient_from_template	(	const std::shared_ptr< Context > &	ctx,
		const SessionBundle &	sessions,
		ESYS_TR	parent,
		const TPMT_PUBLIC &	key_template,
		const TPM2B_SENSITIVE_CREATE &	sensitive_data )

static

This is a wrapper around Esys_CreateLoaded creating a transient key from a given key_template with sensitive_data. It gives maximal flexibility to the caller to create a key with their own TSS2 template configuration.

Please use this if you know what you are doing, only! Most users should use the more convenient create_transient() methods of the derived classes.

Parameters

ctx	The TPM context to use
sessions	The session bundle to use in Esys_CreateLoaded().
parent	The handle of the parent object to create the new key under (this may reference a "Primary Seed" to create a "Primary Key", a "Storage Parent" to create an "Ordinary Key", or a "Derivation Parent" to create a "Derived Key").
key_template	The template data to use for the key creation. It will be passed to Tss2_MU_TPMT_PUBLIC_Marshal() and Esys_CreateLoaded().
sensitive_data	The sensitive data (e.g. with the desired auth value) to use for the key creation.

Definition at line 220 of file tpm2_key.cpp.

                                                                                                                     {
   BOTAN_ASSERT_NONNULL(ctx);
 
   switch(key_template.type) {
      case TPM2_ALG_RSA:
#if not defined(BOTAN_HAS_TPM2_RSA_ADAPTER)
         throw Not_Implemented("TPM2-based RSA keys are not supported in this build");
#endif
         break;
      case TPM2_ALG_ECC:
#if not defined(BOTAN_HAS_TPM2_ECC_ADAPTER)
         throw Not_Implemented("TPM2-based ECC keys are not supported in this build");
#endif
         break;
      default:
         throw Invalid_Argument("Unsupported key type");
   }
 
   const auto marshalled_template = marshal_template(key_template);
 
   Object handle(ctx);
   unique_esys_ptr<TPM2B_PRIVATE> private_bytes;
   unique_esys_ptr<TPM2B_PUBLIC> public_info;
 
   // Esys_CreateLoaded can create different object types depending on the type
   // of the parent passed in. Namely, this will create a Primary object if the
   // parent is referencing a Primary Seed; an Ordinary Object if the parent is
   // referencing a Storage Parent; and a Derived Object if the parent is
   // referencing a Derivation Parent.
   //
   // See the Architecture Document, Section 27.1.
   check_rc("Esys_CreateLoaded",
            Esys_CreateLoaded(*ctx,
                              parent,
                              sessions[0],
                              sessions[1],
                              sessions[2],
                              &sensitive_data,
                              &marshalled_template,
                              out_transient_handle(handle),
                              out_ptr(private_bytes),
                              out_ptr(public_info)));
   BOTAN_ASSERT_NONNULL(private_bytes);
   BOTAN_ASSERT_NOMSG(public_info->publicArea.type == key_template.type);
   BOTAN_ASSERT_NOMSG(handle.has_transient_handle());
 
   return create(std::move(handle), sessions, public_info.get(), as_span(*private_bytes));
}

References Botan::TPM2::as_span(), BOTAN_ASSERT_NOMSG, BOTAN_ASSERT_NONNULL, Botan::TPM2::check_rc(), create(), Botan::TPM2::Object::has_transient_handle(), Botan::out_ptr(), Botan::TPM2::out_transient_handle(), and sessions().

Referenced by Botan::TPM2::EC_PrivateKey::create_unrestricted_transient(), and Botan::TPM2::RSA_PrivateKey::create_unrestricted_transient().

◆ 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::Dilithium_PublicKey, Botan::DSA_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, Botan::Ed25519_PublicKey, Botan::Ed448_PublicKey, Botan::GOST_3410_PublicKey, Botan::HSS_LMS_PublicKey, Botan::RSA_PublicKey, Botan::SM2_PublicKey, Botan::SphincsPlus_PublicKey, Botan::TPM2::EC_PublicKey, Botan::TPM2::RSA_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::Dilithium_PublicKey, Botan::DSA_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, Botan::Ed25519_PublicKey, Botan::Ed448_PublicKey, Botan::GOST_3410_PublicKey, Botan::HSS_LMS_PublicKey, Botan::RSA_PublicKey, Botan::SphincsPlus_PublicKey, and Botan::XMSS_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 201 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()

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::DH_PublicKey, Botan::Dilithium_PublicKey, Botan::DSA_PublicKey, Botan::EC_PublicKey, Botan::Ed25519_PublicKey, Botan::Ed448_PublicKey, Botan::ElGamal_PublicKey, Botan::FrodoKEM_PublicKey, Botan::HSS_LMS_PublicKey, Botan::Kyber_PublicKey, Botan::McEliece_PublicKey, Botan::RSA_PublicKey, Botan::SphincsPlus_PublicKey, Botan::TLS::Hybrid_KEM_PublicKey, Botan::TLS::KEX_to_KEM_Adapter_PublicKey, Botan::TPM_PrivateKey, Botan::X25519_PublicKey, Botan::X448_PublicKey, and Botan::XMSS_PublicKey.

◆ 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()

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::DH_PublicKey, Botan::Dilithium_PublicKey, Botan::DSA_PublicKey, Botan::ECDH_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, Botan::Ed25519_PublicKey, Botan::Ed448_PublicKey, Botan::ElGamal_PublicKey, Botan::FrodoKEM_PublicKey, Botan::GOST_3410_PublicKey, Botan::HSS_LMS_PrivateKey, Botan::HSS_LMS_PublicKey, Botan::Kyber_PublicKey, Botan::McEliece_PublicKey, Botan::RSA_PublicKey, Botan::SM2_PublicKey, Botan::SphincsPlus_PublicKey, Botan::TLS::Hybrid_KEM_PublicKey, Botan::TLS::KEX_to_KEM_Adapter_PublicKey, Botan::TPM2::EC_PrivateKey, Botan::TPM2::PublicKey, Botan::TPM2::RSA_PublicKey, Botan::TPM_PrivateKey, Botan::X25519_PublicKey, Botan::X448_PublicKey, and Botan::XMSS_PublicKey.

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

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

◆ handles() [1/2]

Object & Botan::TPM2::PrivateKey::handles ( )

inline

Definition at line 220 of file tpm2_key.h.

220{ return m_handle; }

Referenced by Botan::TPM2::Session::authenticated_session(), create(), Botan::TPM2::RSA_PrivateKey::create_decryption_op(), Botan::TPM2::EC_PrivateKey::create_signature_op(), Botan::TPM2::RSA_PrivateKey::create_signature_op(), Botan::TPM2::EC_PrivateKey::create_unrestricted_transient(), Botan::TPM2::RSA_PrivateKey::create_unrestricted_transient(), load_transient(), and Botan::TPM2::Context::persist().

◆ handles() [2/2]

const Object & Botan::TPM2::PrivateKey::handles ( ) const

inline

Definition at line 222 of file tpm2_key.h.

222{ return m_handle; }

◆ is_parent()

bool Botan::TPM2::PrivateKey::is_parent ( ) const

Definition at line 283 of file tpm2_key.cpp.

                                 {
   // Architectural Document, Section 4.54
   //   any object with the decrypt and restricted attributes SET and the sign
   //   attribute CLEAR
   const auto attrs = m_handle.attributes(m_sessions);
   return attrs.decrypt && attrs.restricted && !attrs.sign_encrypt;
}

References Botan::TPM2::Object::attributes(), and Botan::TPM2::ObjectAttributes::decrypt.

Referenced by Botan::TPM2::EC_PrivateKey::create_unrestricted_transient(), and Botan::TPM2::RSA_PrivateKey::create_unrestricted_transient().

◆ key_length()

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::DH_PublicKey, Botan::Dilithium_PublicKey, Botan::DSA_PublicKey, Botan::EC_PublicKey, Botan::Ed25519_PublicKey, Botan::Ed448_PublicKey, Botan::ElGamal_PublicKey, Botan::FrodoKEM_PublicKey, Botan::HSS_LMS_PublicKey, Botan::Kyber_PublicKey, Botan::McEliece_PublicKey, Botan::RSA_PublicKey, Botan::SphincsPlus_PublicKey, Botan::TLS::Hybrid_KEM_PublicKey, Botan::TLS::KEX_to_KEM_Adapter_PublicKey, Botan::TPM_PrivateKey, Botan::X25519_PublicKey, Botan::X448_PublicKey, and Botan::XMSS_PublicKey.

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

◆ load_persistent()

std::unique_ptr< PrivateKey > Botan::TPM2::PrivateKey::load_persistent	(	const std::shared_ptr< Context > &	ctx,
		TPM2_HANDLE	persistent_object_handle,
		std::span< const uint8_t >	auth_value,
		const SessionBundle &	sessions )

static

Load a private key that resides in the TPM's persistent storage.

Parameters

ctx	The TPM context to use
persistent_object_handle	The handle of the persistent object to load
auth_value	The auth value required to use the key
sessions	The session bundle to use for the key's operations

Definition at line 180 of file tpm2_key.cpp.

                                                                                       {
   return create(load_persistent_object(ctx, persistent_object_handle, auth_value, sessions),
                 sessions,
                 nullptr /* pull public info from handle */,
                 {} /* persistent keys don't have an encrypted private blob */);
}

References create(), and sessions().

Referenced by Botan::TPM2::Context::storage_root_key().

◆ load_transient()

std::unique_ptr< PrivateKey > Botan::TPM2::PrivateKey::load_transient	(	const std::shared_ptr< Context > &	ctx,
		std::span< const uint8_t >	auth_value,
		const TPM2::PrivateKey &	parent,
		std::span< const uint8_t >	public_blob,
		std::span< const uint8_t >	private_blob,
		const SessionBundle &	sessions )

static

Load a private key from the public and private blobs obtained by a TPM key creation.

Transient keys don't reside inside the TPM but must be loaded by the application as required. Once this object is destructed, the transient memory on the TPM is cleared.

Parameters

ctx	The TPM context to use
auth_value	The auth value required to use the key
parent	The parent key the key was originally created under
public_blob	The public blob of the key to load
private_blob	The private blob of the key to load
sessions	The session bundle to use for loading

Definition at line 190 of file tpm2_key.cpp.

                                                                                      {
   BOTAN_ASSERT_NONNULL(ctx);
   Object handle(ctx);
 
   const auto public_data = unmarshal_public_blob(public_blob);
   const auto private_data = copy_into<TPM2B_PRIVATE>(private_blob);
 
   check_rc("Esys_Load",
            Esys_Load(*ctx,
                      parent.handles().transient_handle(),
                      sessions[0],
                      sessions[1],
                      sessions[2],
                      &private_data,
                      &public_data,
                      out_transient_handle(handle)));
 
   if(!auth_value.empty()) {
      const auto user_auth = copy_into<TPM2B_AUTH>(auth_value);
      check_rc("Esys_TR_SetAuth", Esys_TR_SetAuth(*ctx, handle.transient_handle(), &user_auth));
   }
 
   return create(std::move(handle), sessions, nullptr /* pull public info from handle */, private_blob);
}

References BOTAN_ASSERT_NONNULL, Botan::TPM2::check_rc(), Botan::TPM2::copy_into(), create(), handles(), Botan::TPM2::out_transient_handle(), sessions(), and Botan::TPM2::Object::transient_handle().

◆ 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 199 of file pk_keys.h.

199{ 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 188 of file pk_keys.h.

188{ 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::HSS_LMS_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, and Botan::HSS_LMS_PrivateKey.

Definition at line 296 of file pk_keys.h.

296{ 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::TPM2::PrivateKey::private_key_bits ( ) const

inlineoverridevirtual

Exceptions

Not_Implemented keys hosted in a TPM2 cannot be exported

Implements Botan::Private_Key.

Definition at line 205 of file tpm2_key.h.

                                                               {
         throw Not_Implemented("cannot export private key bits from a TPM2 key, maybe use raw_private_key_bits()?");
      }

◆ 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().

◆ public_key()

virtual std::unique_ptr< Public_Key > Botan::Private_Key::public_key ( ) const

pure virtualinherited

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

Returns: public key

◆ public_key_bits()

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

pure virtualinherited

◆ raw_private_key_bits()

secure_vector< uint8_t > Botan::TPM2::PrivateKey::raw_private_key_bits ( ) const

overridevirtual

Returns: the encrypted private key blob, if the key is transient

Exceptions

Invalid_State if the key is persistent

Reimplemented from Botan::Private_Key.

Definition at line 273 of file tpm2_key.cpp.

                                                              {
   BOTAN_STATE_CHECK(!m_handle.has_persistent_handle());
   BOTAN_ASSERT_NOMSG(!m_private_blob.empty());
   return Botan::lock(m_private_blob);
}

References BOTAN_ASSERT_NOMSG, BOTAN_STATE_CHECK, Botan::TPM2::Object::has_persistent_handle(), and Botan::lock().

◆ raw_public_key_bits()

std::vector< uint8_t > Botan::TPM2::PrivateKey::raw_public_key_bits ( ) const

overridevirtual

Returns: a TPM2-specific marshalled representation of the public key

Implements Botan::Public_Key.

Reimplemented in Botan::TPM2::RSA_PrivateKey.

Definition at line 279 of file tpm2_key.cpp.

                                                         {
   return marshal_public_blob(m_handle._public_info(m_sessions).pub.get());
}

References Botan::TPM2::Object::_public_info(), and Botan::TPM2::PublicInfo::pub.

Referenced by Botan::TPM2::EC_PrivateKey::raw_public_key_bits().

◆ 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::HSS_LMS_PrivateKey, and Botan::XMSS_PrivateKey.

Definition at line 309 of file pk_keys.h.

309{ return std::nullopt; }

◆ sessions()

const SessionBundle & Botan::TPM2::PrivateKey::sessions ( ) const

inline

Definition at line 224 of file tpm2_key.h.

224{ return m_sessions; }

Referenced by create(), Botan::TPM2::RSA_PrivateKey::create_decryption_op(), Botan::TPM2::EC_PrivateKey::create_signature_op(), Botan::TPM2::RSA_PrivateKey::create_signature_op(), create_transient_from_template(), Botan::TPM2::EC_PrivateKey::create_unrestricted_transient(), Botan::TPM2::RSA_PrivateKey::create_unrestricted_transient(), load_persistent(), and load_transient().

◆ 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::HSS_LMS_PrivateKey, and Botan::XMSS_PrivateKey.

Definition at line 302 of file pk_keys.h.

302{ 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()

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::DH_PublicKey, Botan::Dilithium_PublicKey, Botan::DSA_PublicKey, Botan::ECDH_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, Botan::Ed25519_PublicKey, Botan::Ed448_PublicKey, Botan::ElGamal_PublicKey, Botan::FrodoKEM_PublicKey, Botan::GOST_3410_PublicKey, Botan::HSS_LMS_PublicKey, Botan::Kyber_PublicKey, Botan::McEliece_PublicKey, Botan::RSA_PublicKey, Botan::SM2_PublicKey, Botan::SphincsPlus_PublicKey, Botan::TLS::Hybrid_KEM_PublicKey, Botan::TLS::KEX_to_KEM_Adapter_PublicKey, Botan::TPM2::EC_PrivateKey, Botan::TPM2::EC_PublicKey, Botan::TPM2::RSA_PrivateKey, Botan::TPM2::RSA_PublicKey, Botan::TPM_PrivateKey, Botan::X25519_PublicKey, Botan::X448_PublicKey, and Botan::XMSS_PublicKey.

Referenced by Botan::Key_Constraints::compatible_with().

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

src/lib/prov/tpm2/tpm2_key.h
src/lib/prov/tpm2/tpm2_key.cpp

Public Member Functions

Static Public Member Functions

Protected Member Functions

Static Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ PrivateKey()

Member Function Documentation

◆ algo_name()

◆ algorithm_identifier()

◆ check_key()

◆ create()

◆ create_decryption_op()

◆ create_encryption_op()

◆ create_kem_decryption_op()

◆ create_kem_encryption_op()

◆ create_key_agreement_op()

◆ create_signature_op()

◆ create_transient_from_template()

◆ create_verification_op()

◆ create_x509_verification_op()

◆ default_x509_signature_format()

◆ estimated_strength()

◆ fingerprint_private()

◆ fingerprint_public()

◆ generate_another()

◆ get_int_field()

◆ get_oid()

◆ handles() [1/2]

◆ handles() [2/2]

◆ is_parent()

◆ key_length()

◆ load_persistent()

◆ load_transient()

◆ message_part_size()

◆ message_parts()

◆ object_identifier()

◆ pkcs8_algorithm_identifier()

◆ private_key_bits()

◆ private_key_info()

◆ public_key()

◆ public_key_bits()

◆ raw_private_key_bits()

◆ raw_public_key_bits()

◆ remaining_operations()

◆ sessions()

◆ stateful_operation()

◆ subject_public_key()

◆ supports_operation()