#include <ecdsa.h>

Inheritance diagram for Botan::ECDSA_PrivateKey:

Public Member Functions
virtual Signature_Format	_default_x509_signature_format () const

const EC_Scalar &	_private_key () const

const EC_AffinePoint &	_public_ec_point () const

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

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

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

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

Signature_Format	default_x509_signature_format () const

std::vector< uint8_t >	DER_domain () const

const EC_Group &	domain () const

EC_Group_Encoding	domain_format () const

	ECDSA_PrivateKey (const AlgorithmIdentifier &alg_id, std::span< const uint8_t > key_bits)

	ECDSA_PrivateKey (EC_Group group, EC_Scalar x)

	ECDSA_PrivateKey (RandomNumberGenerator &rng, const EC_Group &group, const BigInt &x)

	ECDSA_PrivateKey (RandomNumberGenerator &rng, EC_Group group)

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

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

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

OID	get_oid () 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

EC_Point_Format	point_encoding () const

secure_vector< uint8_t >	private_key_bits () const final

secure_vector< uint8_t >	private_key_info () const

const BigInt &	private_value () const

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

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

secure_vector< uint8_t >	raw_private_key_bits () const final

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

uint8_t	recovery_param (const std::vector< uint8_t > &msg, const BigInt &r, const BigInt &s) const

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

void	set_parameter_encoding (EC_Group_Encoding enc)

void	set_point_encoding (EC_Point_Format enc)

virtual bool	stateful_operation () const

std::vector< uint8_t >	subject_public_key () const

bool	supports_operation (PublicKeyOperation op) const override

Protected Attributes
EC_Group_Encoding	m_domain_encoding = EC_Group_Encoding::NamedCurve

EC_Point_Format	m_point_encoding = EC_Point_Format::Uncompressed

std::shared_ptr< const EC_PrivateKey_Data >	m_private_key

std::shared_ptr< const EC_PublicKey_Data >	m_public_key

Detailed Description

This class represents ECDSA Private Keys

Definition at line 91 of file ecdsa.h.

Constructor & Destructor Documentation

◆ ECDSA_PrivateKey() [1/4]

Botan::ECDSA_PrivateKey::ECDSA_PrivateKey	(	const AlgorithmIdentifier &	alg_id,
		std::span< const uint8_t >	key_bits )

inline

Load a private key

Parameters

alg_id	the X.509 algorithm identifier
key_bits	ECPrivateKey bits

Definition at line 99 of file ecdsa.h.

99 :

100 EC_PrivateKey(alg_id, key_bits) {}

Botan::EC_PrivateKey::EC_PrivateKey

EC_PrivateKey()=default

References Botan::EC_PrivateKey::EC_PrivateKey().

Referenced by ECDSA_PrivateKey().

◆ ECDSA_PrivateKey() [2/4]

Botan::ECDSA_PrivateKey::ECDSA_PrivateKey	(	EC_Group	group,
		EC_Scalar	x )

inline

Create a private key from a given secret x

Parameters

group	curve parameters to bu used for this key
x	the private key

Definition at line 107 of file ecdsa.h.

107: EC_PrivateKey(std::move(group), std::move(x)) {}

References Botan::EC_PrivateKey::EC_PrivateKey().

◆ ECDSA_PrivateKey() [3/4]

Botan::ECDSA_PrivateKey::ECDSA_PrivateKey	(	RandomNumberGenerator &	rng,
		EC_Group	group )

inline

Create a new private key

Parameters

rng	a random number generator
group	parameters to used for this key

Definition at line 114 of file ecdsa.h.

114: EC_PrivateKey(rng, std::move(group)) {}

References Botan::EC_PrivateKey::EC_PrivateKey().

◆ ECDSA_PrivateKey() [4/4]

Botan::ECDSA_PrivateKey::ECDSA_PrivateKey	(	RandomNumberGenerator &	rng,
		const EC_Group &	group,
		const BigInt &	x )

inline

Create a private key.

Parameters

rng	a random number generator
group	parameters to used for this key
x	the private key (if zero, generate a new random key)

Definition at line 123 of file ecdsa.h.

123 :

124 EC_PrivateKey(rng, group, x) {}

References Botan::EC_PrivateKey::EC_PrivateKey(), and ECDSA_PrivateKey().

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().

◆ _private_key()

const EC_Scalar & Botan::EC_PrivateKey::_private_key ( ) const

inherited

Definition at line 123 of file ecc_key.cpp.

                                                   {
   BOTAN_STATE_CHECK(m_private_key != nullptr);
   return m_private_key->private_key();
}

References BOTAN_STATE_CHECK, and m_private_key.

Referenced by Botan::SM2_PrivateKey::SM2_PrivateKey(), Botan::SM2_PrivateKey::SM2_PrivateKey(), Botan::SM2_PrivateKey::SM2_PrivateKey(), Botan::SM2_PrivateKey::SM2_PrivateKey(), and ~EC_PrivateKey().

◆ _public_ec_point()

const EC_AffinePoint & Botan::EC_PublicKey::_public_ec_point ( ) const

inherited

Definition at line 76 of file ecc_key.cpp.

                                                           {
   BOTAN_STATE_CHECK(m_public_key != nullptr);
   return m_public_key->public_key();
}

References BOTAN_STATE_CHECK, and m_public_key.

Referenced by botan_pubkey_sm2_compute_za(), check_key(), Botan::ECDH_PrivateKey::public_key(), Botan::ECDSA_PrivateKey::public_key(), Botan::ECGDSA_PrivateKey::public_key(), Botan::ECKCDSA_PrivateKey::public_key(), Botan::GOST_3410_PrivateKey::public_key(), Botan::SM2_PrivateKey::public_key(), Botan::TPM2::EC_PrivateKey::public_key(), Botan::GOST_3410_PublicKey::public_key_bits(), Botan::ECDH_PublicKey::public_value(), raw_public_key_bits(), and Botan::ECDSA_PublicKey::recovery_param().

◆ _signature_element_size_for_DER_encoding()

std::optional< size_t > Botan::ECDSA_PublicKey::_signature_element_size_for_DER_encoding ( ) const

inlineoverridevirtualinherited

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 from Botan::Asymmetric_Key.

Definition at line 64 of file ecdsa.h.

                                                                                    {
         return domain().get_order_bytes();
      }

References Botan::EC_PublicKey::domain().

◆ algo_name()

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

inlineoverridevirtualinherited

Get this keys algorithm name.

Returns: this keys algorithm name ("ECDSA")

Implements Botan::Asymmetric_Key.

Definition at line 62 of file ecdsa.h.

62{ return "ECDSA"; }

Referenced by Botan::ECDSA_PrivateKey::create_signature_op(), create_verification_op(), and create_x509_verification_op().

◆ algorithm_identifier()

AlgorithmIdentifier Botan::EC_PublicKey::algorithm_identifier ( ) const

overridevirtualinherited

Returns: X.509 AlgorithmIdentifier for this key

Implements Botan::Public_Key.

Reimplemented in Botan::GOST_3410_PublicKey.

Definition at line 86 of file ecc_key.cpp.

                                                             {
   return AlgorithmIdentifier(object_identifier(), DER_domain());
}

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

Referenced by Botan::GOST_3410_PrivateKey::pkcs8_algorithm_identifier(), and ~EC_PublicKey().

◆ check_key()

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

overridevirtual

Reimplemented from Botan::EC_PublicKey.

Definition at line 105 of file ecdsa.cpp.

                                                                              {
   if(!EC_PrivateKey::check_key(rng, strong)) {
      return false;
   }
 
   if(!strong) {
      return true;
   }
 
   return KeyPair::signature_consistency_check(rng, *this, "SHA-256");
}

References Botan::EC_PrivateKey::check_key(), and Botan::KeyPair::signature_consistency_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::ECDSA_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 249 of file ecdsa.cpp.

                                                                                                        {
   if(provider == "base" || provider.empty()) {
      return std::make_unique<ECDSA_Signature_Operation>(*this, params, rng);
   }
 
   throw Provider_Not_Found(algo_name(), provider);
}

References Botan::ECDSA_PublicKey::algo_name().

◆ create_verification_op()

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

overridevirtualinherited

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 from Botan::Public_Key.

Definition at line 231 of file ecdsa.cpp.

                                                                                                             {
   if(provider == "base" || provider.empty()) {
      return std::make_unique<ECDSA_Verification_Operation>(*this, params);
   }
 
   throw Provider_Not_Found(algo_name(), provider);
}

References algo_name().

◆ create_x509_verification_op()

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

overridevirtualinherited

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 from Botan::Public_Key.

Definition at line 240 of file ecdsa.cpp.

                                                                                  {
   if(provider == "base" || provider.empty()) {
      return std::make_unique<ECDSA_Verification_Operation>(*this, signature_algorithm);
   }
 
   throw Provider_Not_Found(algo_name(), provider);
}

References algo_name().

◆ 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().

◆ DER_domain()

std::vector< uint8_t > Botan::EC_PublicKey::DER_domain ( ) const

inherited

Return the DER encoding of this keys domain in whatever format is preset for this particular key

Definition at line 98 of file ecc_key.cpp.

                                                  {
   return domain().DER_encode(domain_format());
}

References Botan::EC_Group::DER_encode(), domain(), and domain_format().

Referenced by algorithm_identifier(), and ~EC_PublicKey().

◆ domain()

const EC_Group & Botan::EC_PublicKey::domain ( ) const

inherited

Get the domain parameters of this key.

Exceptions

Invalid_State is thrown if the domain parameters of this point are not set

Returns: the domain parameters of this key

Definition at line 64 of file ecc_key.cpp.

                                           {
   BOTAN_STATE_CHECK(m_public_key != nullptr);
   return m_public_key->group();
}

References BOTAN_STATE_CHECK, and m_public_key.

◆ domain_format()

EC_Group_Encoding Botan::EC_PublicKey::domain_format ( ) const

inlineinherited

Get the domain parameter encoding to be used when encoding this key.

Returns: the encoding to use

Definition at line 92 of file ecc_key.h.

92{ return m_domain_encoding; }

Botan::EC_PublicKey::m_domain_encoding

EC_Group_Encoding m_domain_encoding

Definition ecc_key.h:136

References domain_format(), and m_domain_encoding.

Referenced by DER_domain(), and domain_format().

◆ estimated_strength()

size_t Botan::EC_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 30 of file ecc_key.cpp.

                                              {
   return ecp_work_factor(key_length());
}

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

◆ 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::ECDSA_PublicKey::generate_another ( RandomNumberGenerator & rng ) const

overridevirtualinherited

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 79 of file ecdsa.cpp.

                                                                                             {
   return std::make_unique<ECDSA_PrivateKey>(rng, domain());
}

References Botan::EC_PublicKey::domain().

◆ get_int_field()

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

finalvirtualinherited

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 from Botan::Asymmetric_Key.

Definition at line 231 of file ecc_key.cpp.

                                                                     {
   if(field == "x") {
      return this->private_value();
   } else {
      return EC_PublicKey::get_int_field(field);
   }
}

References Botan::EC_PublicKey::get_int_field(), and private_value().

Referenced by ~EC_PrivateKey().

◆ 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().

◆ key_length()

size_t Botan::EC_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 26 of file ecc_key.cpp.

                                      {
   return domain().get_p_bits();
}

References domain(), and Botan::EC_Group::get_p_bits().

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().

◆ point_encoding()

EC_Point_Format Botan::EC_PublicKey::point_encoding ( ) const

inlineinherited

Get the point encoding method to be used when encoding this key.

Returns: the encoding to use

Definition at line 98 of file ecc_key.h.

98{ return m_point_encoding; }

Botan::EC_PublicKey::m_point_encoding

EC_Point_Format m_point_encoding

Definition ecc_key.h:137

References m_point_encoding.

Referenced by raw_public_key_bits().

◆ private_key_bits()

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

finalvirtualinherited

Returns: BER encoded private key bits

Implements Botan::Private_Key.

Definition at line 159 of file ecc_key.cpp.

                                                             {
   BOTAN_STATE_CHECK(m_private_key != nullptr && m_public_key != nullptr);
 
   return DER_Encoder()
      .start_sequence()
      .encode(static_cast<size_t>(1))
      .encode(raw_private_key_bits(), ASN1_Type::OctetString)
      .start_explicit_context_specific(1)
      .encode(m_public_key->public_key().serialize_uncompressed(), ASN1_Type::BitString)
      .end_cons()
      .end_cons()
      .get_contents();
}

References Botan::BitString, BOTAN_STATE_CHECK, Botan::DER_Encoder::encode(), Botan::DER_Encoder::end_cons(), Botan::DER_Encoder::get_contents(), m_private_key, Botan::EC_PublicKey::m_public_key, Botan::OctetString, raw_private_key_bits(), Botan::DER_Encoder::start_explicit_context_specific(), and Botan::DER_Encoder::start_sequence().

Referenced by EC_PrivateKey().

◆ 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().

◆ private_value()

const BigInt & Botan::EC_PrivateKey::private_value ( ) const

inherited

Get the private key value of this key object.

Returns: the private key value of this key object

Definition at line 118 of file ecc_key.cpp.

                                                 {
   BOTAN_STATE_CHECK(m_private_key != nullptr);
   return m_private_key->legacy_bigint();
}

References BOTAN_STATE_CHECK, and m_private_key.

Referenced by Botan::SM2_PrivateKey::check_key(), and get_int_field().

◆ public_key()

std::unique_ptr< Public_Key > Botan::ECDSA_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 101 of file ecdsa.cpp.

                                                             {
   return std::make_unique<ECDSA_PublicKey>(domain(), _public_ec_point());
}

References Botan::EC_PublicKey::_public_ec_point(), and Botan::EC_PublicKey::domain().

◆ public_key_bits()

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

overridevirtualinherited

Returns: BER encoded public key bits

Implements Botan::Public_Key.

Reimplemented in Botan::GOST_3410_PublicKey, and Botan::TPM2::EC_PublicKey.

Definition at line 94 of file ecc_key.cpp.

                                                       {
   return raw_public_key_bits();
}

References raw_public_key_bits().

Referenced by Botan::EC_PrivateKey::EC_PrivateKey(), and ~EC_PublicKey().

◆ raw_private_key_bits()

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

finalvirtualinherited

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 from Botan::Private_Key.

Definition at line 154 of file ecc_key.cpp.

                                                                 {
   BOTAN_STATE_CHECK(m_private_key != nullptr);
   return m_private_key->serialize<secure_vector<uint8_t>>();
}

References BOTAN_STATE_CHECK, and m_private_key.

Referenced by private_key_bits().

◆ raw_public_key_bits()

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

overridevirtualinherited

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.

Reimplemented in Botan::TPM2::EC_PublicKey.

Definition at line 90 of file ecc_key.cpp.

                                                           {
   return _public_ec_point().serialize(point_encoding());
}

References _public_ec_point(), point_encoding(), and Botan::EC_AffinePoint::serialize().

Referenced by public_key_bits(), Botan::TPM2::EC_PrivateKey::public_key_bits(), Botan::TPM2::EC_PublicKey::public_key_bits(), and ~EC_PublicKey().

◆ recovery_param()

uint8_t Botan::ECDSA_PublicKey::recovery_param	(	const std::vector< uint8_t > &	msg,
		const BigInt &	r,
		const BigInt &	s ) const

inherited

Definition at line 83 of file ecdsa.cpp.

                                                                                                             {
   const auto this_key = this->_public_ec_point().serialize_compressed();
 
   for(uint8_t v = 0; v != 4; ++v) {
      try {
         const auto R = recover_ecdsa_public_key(this->domain(), msg, r, s, v);
 
         if(R.serialize_compressed() == this_key) {
            return v;
         }
      } catch(Decoding_Error&) {
         // try the next v
      }
   }
 
   throw Internal_Error("Could not determine ECDSA recovery parameter");
}

References Botan::EC_PublicKey::_public_ec_point(), Botan::EC_PublicKey::domain(), and Botan::EC_AffinePoint::serialize_compressed().

◆ 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; }

◆ set_parameter_encoding()

void Botan::EC_PublicKey::set_parameter_encoding ( EC_Group_Encoding enc )

inherited

Set the domain parameter encoding to be used when encoding this key.

Parameters

enc	the encoding to use

This function is deprecated; in a future major release only namedCurve encoding of domain parameters will be allowed.

Definition at line 110 of file ecc_key.cpp.

                                                                {
   if(form == EC_Group_Encoding::NamedCurve && domain().get_curve_oid().empty()) {
      throw Invalid_Argument("Cannot used NamedCurve encoding for a curve without an OID");
   }
 
   m_domain_encoding = form;
}

References domain(), m_domain_encoding, and Botan::NamedCurve.

Referenced by ~EC_PublicKey().

◆ set_point_encoding()

void Botan::EC_PublicKey::set_point_encoding ( EC_Point_Format enc )

inherited

Set the point encoding method to be used when encoding this key.

Parameters

enc	the encoding to use

Definition at line 102 of file ecc_key.cpp.

                                                         {
   if(enc != EC_Point_Format::Compressed && enc != EC_Point_Format::Uncompressed && enc != EC_Point_Format::Hybrid) {
      throw Invalid_Argument("Invalid point encoding for EC_PublicKey");
   }
 
   m_point_encoding = enc;
}

References Botan::Compressed, Botan::Hybrid, m_point_encoding, and Botan::Uncompressed.

Referenced by ~EC_PublicKey().

◆ 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::ECDSA_PublicKey::supports_operation ( PublicKeyOperation op ) const

inlineoverridevirtualinherited

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

Implements Botan::Asymmetric_Key.

Definition at line 68 of file ecdsa.h.

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

Botan::PublicKeyOperation::Signature

@ Signature

Definition pk_keys.h:48

References Botan::Signature.

Member Data Documentation

◆ m_domain_encoding

EC_Group_Encoding Botan::EC_PublicKey::m_domain_encoding = EC_Group_Encoding::NamedCurve

protectedinherited

Definition at line 136 of file ecc_key.h.

Referenced by domain_format(), Botan::EC_PrivateKey::EC_PrivateKey(), Botan::EC_PrivateKey::EC_PrivateKey(), Botan::EC_PrivateKey::EC_PrivateKey(), Botan::EC_PrivateKey::EC_PrivateKey(), EC_PublicKey(), EC_PublicKey(), and set_parameter_encoding().

◆ m_point_encoding

EC_Point_Format Botan::EC_PublicKey::m_point_encoding = EC_Point_Format::Uncompressed

protectedinherited

Definition at line 137 of file ecc_key.h.

Referenced by point_encoding(), and set_point_encoding().

◆ m_private_key

std::shared_ptr<const EC_PrivateKey_Data> Botan::EC_PrivateKey::m_private_key

protectedinherited

Definition at line 219 of file ecc_key.h.

Referenced by _private_key(), check_key(), EC_PrivateKey(), EC_PrivateKey(), EC_PrivateKey(), EC_PrivateKey(), private_key_bits(), private_value(), and raw_private_key_bits().

◆ m_public_key

std::shared_ptr<const EC_PublicKey_Data> Botan::EC_PublicKey::m_public_key

protectedinherited

Definition at line 135 of file ecc_key.h.

Referenced by _public_ec_point(), domain(), Botan::EC_PrivateKey::EC_PrivateKey(), Botan::EC_PrivateKey::EC_PrivateKey(), Botan::EC_PrivateKey::EC_PrivateKey(), Botan::EC_PrivateKey::EC_PrivateKey(), EC_PublicKey(), EC_PublicKey(), Botan::GOST_3410_PublicKey::GOST_3410_PublicKey(), and Botan::EC_PrivateKey::private_key_bits().

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

src/lib/pubkey/ecdsa/ecdsa.h
src/lib/pubkey/ecdsa/ecdsa.cpp

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ ECDSA_PrivateKey() [1/4]

◆ ECDSA_PrivateKey() [2/4]

◆ ECDSA_PrivateKey() [3/4]

◆ ECDSA_PrivateKey() [4/4]

Member Function Documentation

◆ _default_x509_signature_format()

◆ _private_key()

◆ _public_ec_point()

◆ _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()

◆ default_x509_signature_format()

◆ DER_domain()

◆ domain()

◆ domain_format()

◆ estimated_strength()

◆ fingerprint_private()

◆ fingerprint_public()

◆ generate_another()

◆ get_int_field()

◆ get_oid()

◆ key_length()

◆ message_part_size()

◆ message_parts()

◆ object_identifier()

◆ pkcs8_algorithm_identifier()

◆ point_encoding()

◆ private_key_bits()

◆ private_key_info()

◆ private_value()

◆ public_key()

◆ public_key_bits()

◆ raw_private_key_bits()

◆ raw_public_key_bits()

◆ recovery_param()

◆ remaining_operations()

◆ set_parameter_encoding()

◆ set_point_encoding()

◆ stateful_operation()

◆ subject_public_key()

◆ supports_operation()

Member Data Documentation

◆ m_domain_encoding

◆ m_point_encoding

◆ m_private_key

◆ m_public_key