#include <tpm.h>

Inheritance diagram for Botan::TPM_PrivateKey:

Public Member Functions
virtual Signature_Format	_default_x509_signature_format () const

virtual std::optional< size_t >	_signature_element_size_for_DER_encoding () const

std::string	algo_name () const override

AlgorithmIdentifier	algorithm_identifier () const override

bool	check_key (RandomNumberGenerator &rng, bool) 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

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

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

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

TPM_Context &	ctx () const

Signature_Format	default_x509_signature_format () const

size_t	estimated_strength () const override

std::vector< uint8_t >	export_blob () const

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

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

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

BigInt	get_e () const

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

BigInt	get_n () const

OID	get_oid () const

TSS_HKEY	handle () const

size_t	key_length () const override

size_t	message_part_size () const

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

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

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

virtual secure_vector< uint8_t >	raw_private_key_bits () const

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

std::string	register_key (TPM_Storage_Type storage_type)

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

bool	supports_operation (PublicKeyOperation op) const override

	TPM_PrivateKey (TPM_Context &ctx, const std::vector< uint8_t > &blob)

	TPM_PrivateKey (TPM_Context &ctx, size_t bits, const char *key_password)

	TPM_PrivateKey (TPM_Context &ctx, std::string_view uuid, TPM_Storage_Type storage_type)

Static Public Member Functions
static std::vector< std::string >	registered_keys (TPM_Context &ctx)

Detailed Description

Definition at line 108 of file tpm.h.

Constructor & Destructor Documentation

◆ TPM_PrivateKey() [1/3]

Botan::TPM_PrivateKey::TPM_PrivateKey	(	TPM_Context &	ctx,
		size_t	bits,
		const char *	key_password )

Definition at line 178 of file tpm.cpp.

                                                                                      : m_ctx(ctx) {
   // TODO: can also do OAEP decryption via binding keys
   // TODO: offer signing, binding (decrypt), or legacy (sign + decrypt) keys?
 
   TSS_FLAG key_flags = bit_flag(bits) | TSS_KEY_VOLATILE | TSS_KEY_TYPE_SIGNING;
 
   TSS_HKEY key;
   TSPI_CHECK_SUCCESS(::Tspi_Context_CreateObject(m_ctx.handle(), TSS_OBJECT_TYPE_RSAKEY, key_flags, &key));
 
   TSPI_CHECK_SUCCESS(
      ::Tspi_SetAttribUint32(key, TSS_TSPATTRIB_KEY_INFO, TSS_TSPATTRIB_KEYINFO_SIGSCHEME, TSS_SS_RSASSAPKCS1V15_DER));
 
   TSS_HPOLICY policy;
   TSPI_CHECK_SUCCESS(::Tspi_Context_CreateObject(m_ctx.handle(), TSS_OBJECT_TYPE_POLICY, TSS_POLICY_USAGE, &policy));
   set_policy_secret(policy, key_password);
   TSPI_CHECK_SUCCESS(::Tspi_Policy_AssignToObject(policy, key));
 
   TSPI_CHECK_SUCCESS(::Tspi_Key_CreateKey(key, ctx.srk(), 0));
   m_key = key;
}

References ctx(), and TSPI_CHECK_SUCCESS.

◆ TPM_PrivateKey() [2/3]

Botan::TPM_PrivateKey::TPM_PrivateKey	(	TPM_Context &	ctx,
		std::string_view	uuid,
		TPM_Storage_Type	storage_type )

Definition at line 200 of file tpm.cpp.

                                                                                                       :
      m_ctx(ctx), m_uuid(uuid_str), m_storage(storage_type) {
   const TSS_FLAG key_ps_type = (m_storage == TPM_Storage_Type::User) ? TSS_PS_TYPE_USER : TSS_PS_TYPE_SYSTEM;
 
   TSPI_CHECK_SUCCESS(::Tspi_Context_LoadKeyByUUID(m_ctx.handle(), key_ps_type, to_tss_uuid(m_uuid), &m_key));
}

References ctx(), TSPI_CHECK_SUCCESS, and Botan::User.

◆ TPM_PrivateKey() [3/3]

Botan::TPM_PrivateKey::TPM_PrivateKey	(	TPM_Context &	ctx,
		const std::vector< uint8_t > &	blob )

Definition at line 207 of file tpm.cpp.

                                                                               : m_ctx(ctx) {
   TSPI_CHECK_SUCCESS(::Tspi_Context_LoadKeyByBlob(
      m_ctx.handle(), m_ctx.srk(), to_uint32(blob.size()), const_cast<uint8_t*>(blob.data()), &m_key));
 
   //TSPI_CHECK_SUCCESS(::Tspi_Key_LoadKey(m_key, m_ctx.srk()));
}

References ctx(), and TSPI_CHECK_SUCCESS.

Member Function Documentation

◆ _default_x509_signature_format()

Signature_Format Botan::Asymmetric_Key::_default_x509_signature_format ( ) const

virtualinherited

Reimplemented in Botan::GOST_3410_PublicKey.

Definition at line 30 of file pk_keys.cpp.

                                                                      {
   if(_signature_element_size_for_DER_encoding()) {
      return Signature_Format::DerSequence;
   } else {
      return Signature_Format::Standard;
   }
}

References _signature_element_size_for_DER_encoding(), Botan::DerSequence, and Botan::Standard.

Referenced by Botan::X509_Object::choose_sig_format(), Botan::Public_Key::default_x509_signature_format(), and Botan::PK_Verifier::PK_Verifier().

◆ _signature_element_size_for_DER_encoding()

virtual std::optional< size_t > Botan::Asymmetric_Key::_signature_element_size_for_DER_encoding ( ) const

inlinevirtualinherited

Certain signatures schemes such as ECDSA have more than one element, and certain unfortunate protocols decided the thing to do was not concatenate them as normally done, but instead DER encode each of the elements as independent values.

If this returns a value x then the signature is checked to be exactly 2*x bytes and split in half for DER encoding.

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 137 of file pk_keys.h.

137{ return {}; }

Referenced by _default_x509_signature_format(), Botan::Public_Key::message_part_size(), Botan::Public_Key::message_parts(), Botan::PK_Verifier::PK_Verifier(), and Botan::PK_Verifier::PK_Verifier().

◆ algo_name()

std::string Botan::TPM_PrivateKey::algo_name ( ) const

inlineoverridevirtual

Get the name of the underlying public key scheme.

Returns: name of the public key scheme

Implements Botan::Asymmetric_Key.

Definition at line 167 of file tpm.h.

167{ return "RSA"; } // ???

◆ algorithm_identifier()

AlgorithmIdentifier Botan::TPM_PrivateKey::algorithm_identifier ( ) const

overridevirtual

Returns: X.509 AlgorithmIdentifier for this key

Implements Botan::Public_Key.

Definition at line 284 of file tpm.cpp.

                                                               {
   return AlgorithmIdentifier(object_identifier(), AlgorithmIdentifier::USE_NULL_PARAM);
}

References Botan::Asymmetric_Key::object_identifier(), and Botan::AlgorithmIdentifier::USE_NULL_PARAM.

◆ check_key()

bool Botan::TPM_PrivateKey::check_key	(	RandomNumberGenerator &	rng,
		bool	) const

overridevirtual

Implements Botan::Asymmetric_Key.

Definition at line 310 of file tpm.cpp.

                                                                 {
   return true;  // TODO do a kat or pairwise check
}

◆ 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 119 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 98 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::Classic_McEliece_PrivateKey, Botan::FrodoKEM_PrivateKey, Botan::KEX_to_KEM_Adapter_PrivateKey, Botan::Kyber_PrivateKey, Botan::McEliece_PrivateKey, Botan::RSA_PrivateKey, and Botan::TLS::Hybrid_KEM_PrivateKey.

Definition at line 125 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::Classic_McEliece_PublicKey, Botan::FrodoKEM_PublicKey, Botan::KEX_to_KEM_Adapter_PublicKey, Botan::Kyber_PublicKey, Botan::McEliece_PublicKey, Botan::RSA_PublicKey, and Botan::TLS::Hybrid_KEM_PublicKey.

Definition at line 104 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 137 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::TPM_PrivateKey::create_signature_op	(	RandomNumberGenerator &	rng,
		std::string_view	params,
		std::string_view	provider ) const

overridevirtual

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 from Botan::Private_Key.

Definition at line 375 of file tpm.cpp.

                                                                                               {
   return std::make_unique<TPM_Signing_Operation>(*this, params);
}

◆ 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 109 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 114 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().

◆ ctx()

TPM_Context & Botan::TPM_PrivateKey::ctx ( ) const

inline

Definition at line 140 of file tpm.h.

140{ return m_ctx; }

Referenced by register_key(), registered_keys(), TPM_PrivateKey(), TPM_PrivateKey(), and TPM_PrivateKey().

◆ default_x509_signature_format()

Signature_Format Botan::Public_Key::default_x509_signature_format ( ) const

inlineinherited

Definition at line 228 of file pk_keys.h.

                                                                                                           {
         return _default_x509_signature_format();
      }

References Botan::Asymmetric_Key::_default_x509_signature_format(), and default_x509_signature_format().

Referenced by default_x509_signature_format().

◆ estimated_strength()

size_t Botan::TPM_PrivateKey::estimated_strength ( ) const

overridevirtual

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 276 of file tpm.cpp.

                                                {
   return if_work_factor(key_length());
}

References Botan::if_work_factor(), and key_length().

◆ export_blob()

std::vector< uint8_t > Botan::TPM_PrivateKey::export_blob ( ) const

Definition at line 302 of file tpm.cpp.

                                                     {
   return get_obj_attr(m_ctx.handle(), m_key, TSS_TSPATTRIB_KEY_BLOB, TSS_TSPATTRIB_KEYBLOB_BLOB);
}

◆ 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 94 of file pk_keys.cpp.

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

References Botan::create_hex_fingerprint(), and 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 87 of file pk_keys.cpp.

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

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

Referenced by public_key_bits().

◆ generate_another()

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

inlineoverridevirtual

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 169 of file tpm.h.

                                                                                         {
         throw Not_Implemented("Cannot generate a new TPM-based keypair from this asymmetric key");
      }

◆ get_e()

BigInt Botan::TPM_PrivateKey::get_e ( ) const

Definition at line 267 of file tpm.cpp.

                                   {
   if(m_e == 0) {
      m_e = BigInt::from_bytes(
         get_obj_attr(m_ctx.handle(), m_key, TSS_TSPATTRIB_RSAKEY_INFO, TSS_TSPATTRIB_KEYINFO_RSA_EXPONENT));
   }
 
   return m_e;
}

References Botan::BigInt::from_bytes().

Referenced by public_key(), and public_key_bits().

◆ 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.

TODO(Botan4) Change this to return by value

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 algo_name().

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

◆ get_n()

BigInt Botan::TPM_PrivateKey::get_n ( ) const

Definition at line 258 of file tpm.cpp.

                                   {
   if(m_n == 0) {
      m_n = BigInt::from_bytes(
         get_obj_attr(m_ctx.handle(), m_key, TSS_TSPATTRIB_RSAKEY_INFO, TSS_TSPATTRIB_KEYINFO_RSA_MODULUS));
   }
 
   return m_n;
}

References Botan::BigInt::from_bytes().

Referenced by key_length(), public_key(), and public_key_bits().

◆ get_oid()

OID Botan::Public_Key::get_oid ( ) const

inlineinherited

Deprecated version of object_identifier

Definition at line 161 of file pk_keys.h.

161{ return this->object_identifier(); }

References get_oid(), and Botan::Asymmetric_Key::object_identifier().

Referenced by get_oid().

◆ handle()

TSS_HKEY Botan::TPM_PrivateKey::handle ( ) const

inline

Definition at line 142 of file tpm.h.

142{ return m_key; }

◆ key_length()

size_t Botan::TPM_PrivateKey::key_length ( ) const

overridevirtual

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 280 of file tpm.cpp.

                                        {
   return get_n().bits();
}

References Botan::BigInt::bits(), and get_n().

Referenced by estimated_strength().

◆ message_part_size()

size_t Botan::Public_Key::message_part_size ( ) const

inlineinherited

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

Definition at line 221 of file pk_keys.h.

                                                                                     {
         return _signature_element_size_for_DER_encoding().value_or(0);
      }

References Botan::Asymmetric_Key::_signature_element_size_for_DER_encoding(), and message_part_size().

Referenced by message_part_size().

◆ message_parts()

size_t Botan::Public_Key::message_parts ( ) const

inlineinherited

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

Definition at line 208 of file pk_keys.h.

                                                                                 {
         return _signature_element_size_for_DER_encoding() ? 2 : 1;
      }

References Botan::Asymmetric_Key::_signature_element_size_for_DER_encoding(), and message_parts().

Referenced by message_parts().

◆ 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::Classic_McEliece_PublicKey, 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 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 323 of file pk_keys.h.

323{ return algorithm_identifier(); }

Botan::Public_Key::algorithm_identifier

virtual AlgorithmIdentifier algorithm_identifier() const =0

References Botan::Public_Key::algorithm_identifier().

Referenced by private_key_info().

◆ private_key_bits()

secure_vector< uint8_t > Botan::TPM_PrivateKey::private_key_bits ( ) const

overridevirtual

Returns: BER encoded private key bits

Implements Botan::Private_Key.

Definition at line 298 of file tpm.cpp.

                                                              {
   throw TPM_Error("Private key export not supported for TPM keys");
}

◆ 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 68 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, pkcs8_algorithm_identifier(), 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(), Botan::PKCS8::PEM_encode(), and public_key().

◆ public_key()

std::unique_ptr< Public_Key > Botan::TPM_PrivateKey::public_key ( ) const

overridevirtual

Returns a copy of the public key

Implements Botan::Private_Key.

Definition at line 306 of file tpm.cpp.

                                                           {
   return std::make_unique<RSA_PublicKey>(get_n(), get_e());
}

References get_e(), and get_n().

◆ public_key_bits()

std::vector< uint8_t > Botan::TPM_PrivateKey::public_key_bits ( ) const

overridevirtual

Returns: BER encoded public key bits

Implements Botan::Public_Key.

Definition at line 288 of file tpm.cpp.

                                                         {
   std::vector<uint8_t> bits;
   DER_Encoder(bits).start_sequence().encode(get_n()).encode(get_e()).end_cons();
   return bits;
}

References Botan::DER_Encoder::encode(), Botan::DER_Encoder::end_cons(), get_e(), get_n(), and Botan::DER_Encoder::start_sequence().

◆ 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::Classic_McEliece_PrivateKey, Botan::DH_PrivateKey, Botan::Dilithium_PrivateKey, Botan::DSA_PrivateKey, Botan::EC_PrivateKey, Botan::Ed25519_PrivateKey, Botan::Ed448_PrivateKey, Botan::ElGamal_PrivateKey, Botan::FrodoKEM_PrivateKey, Botan::HSS_LMS_PrivateKey, Botan::KEX_to_KEM_Adapter_PrivateKey, Botan::Kyber_PrivateKey, Botan::SphincsPlus_PrivateKey, Botan::TPM2::PrivateKey, Botan::X25519_PrivateKey, and Botan::X448_PrivateKey.

Definition at line 80 of file pk_keys.cpp.

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

References Botan::Asymmetric_Key::algo_name().

Referenced by private_key_bits().

◆ raw_public_key_bits()

std::vector< uint8_t > Botan::TPM_PrivateKey::raw_public_key_bits ( ) const

overridevirtual

Returns: binary public key bits, with no additional encoding

For key agreements this is an alias for PK_Key_Agreement_Key::public_value.

Note: some algorithms (for example RSA) do not have an obvious encoding for this value due to having many different values, and thus throw Not_Implemented when invoking this method.

Implements Botan::Public_Key.

Definition at line 294 of file tpm.cpp.

                                                             {
   throw TPM_Error("Raw public key export not supported for RSA TPM keys");
}

◆ register_key()

std::string Botan::TPM_PrivateKey::register_key ( TPM_Storage_Type storage_type )

If the key is not currently registered under a known UUID, generates a new random UUID and registers the key. Returns the access URL.

Definition at line 214 of file tpm.cpp.

                                                                    {
   if(!m_uuid.is_valid()) {
      TPM_RNG rng(ctx());  // use system_rng or arg RNG& instead?
      m_uuid = UUID(rng);
      m_storage = storage_type;
 
      const TSS_UUID key_uuid = to_tss_uuid(m_uuid);
      const TSS_FLAG key_ps_type = (storage_type == TPM_Storage_Type::User) ? TSS_PS_TYPE_USER : TSS_PS_TYPE_SYSTEM;
 
      const TSS_UUID srk_uuid = TSS_UUID_SRK;
 
      TSPI_CHECK_SUCCESS(
         ::Tspi_Context_RegisterKey(m_ctx.handle(), m_key, key_ps_type, key_uuid, TSS_PS_TYPE_SYSTEM, srk_uuid));
   }
 
   // Presumably we could re-register in the other store and same UUID
   // Doesn't seem like what is desired most of the time here
   if(storage_type != m_storage) {
      throw TPM_Error("TPM key " + m_uuid.to_string() + " already registered with different storage type");
   }
 
   return format_url(m_uuid, m_storage);
}

References ctx(), TSPI_CHECK_SUCCESS, and Botan::User.

◆ registered_keys()

std::vector< std::string > Botan::TPM_PrivateKey::registered_keys ( TPM_Context & ctx )

static

Definition at line 238 of file tpm.cpp.

                                                                     {
   TSS_KM_KEYINFO2* key_info;
   UINT32 key_info_size;
 
   // TODO: does the PS type matter here at all?
   TSPI_CHECK_SUCCESS(
      ::Tspi_Context_GetRegisteredKeysByUUID2(ctx.handle(), TSS_PS_TYPE_SYSTEM, nullptr, &key_info_size, &key_info));
 
   std::vector<std::string> r(key_info_size);
 
   for(size_t i = 0; i != key_info_size; ++i) {
      r[i] = format_url(key_info[i].keyUUID, key_info[i].persistentStorageType);
   }
 
   // TODO: are we supposed to free this memory and if so how?
   //TSPI_CHECK_SUCCESS(::Tspi_Context_FreeMemory(ctx.handle(), key_info));
 
   return r;
}

References ctx(), and TSPI_CHECK_SUCCESS.

◆ 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 336 of file pk_keys.h.

336{ 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::HSS_LMS_PrivateKey, and Botan::XMSS_PrivateKey.

Definition at line 329 of file pk_keys.h.

329{ 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 56 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 algorithm_identifier(), Botan::BitString, Botan::DER_Encoder::encode(), Botan::DER_Encoder::end_cons(), public_key_bits(), and Botan::DER_Encoder::start_sequence().

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

◆ supports_operation()

bool Botan::TPM_PrivateKey::supports_operation ( PublicKeyOperation op ) const

inlineoverridevirtual

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

Implements Botan::Asymmetric_Key.

Definition at line 173 of file tpm.h.

173{ return (op == PublicKeyOperation::Signature); }

Botan::PublicKeyOperation::Signature

@ Signature

Definition pk_keys.h:48

References Botan::Signature.

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

src/lib/prov/tpm/tpm.h
src/lib/prov/tpm/tpm.cpp

Public Member Functions

Static Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ TPM_PrivateKey() [1/3]

◆ TPM_PrivateKey() [2/3]

◆ TPM_PrivateKey() [3/3]

Member Function Documentation

◆ _default_x509_signature_format()

◆ _signature_element_size_for_DER_encoding()

◆ algo_name()

◆ algorithm_identifier()

◆ check_key()

◆ create_decryption_op()

◆ create_encryption_op()

◆ create_kem_decryption_op()

◆ create_kem_encryption_op()

◆ create_key_agreement_op()

◆ create_signature_op()

◆ create_verification_op()

◆ create_x509_verification_op()

◆ ctx()

◆ default_x509_signature_format()

◆ estimated_strength()

◆ export_blob()

◆ fingerprint_private()

◆ fingerprint_public()

◆ generate_another()

◆ get_e()

◆ get_int_field()

◆ get_n()

◆ get_oid()

◆ handle()

◆ key_length()

◆ 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()

◆ register_key()

◆ registered_keys()

◆ remaining_operations()

◆ stateful_operation()

◆ subject_public_key()

◆ supports_operation()