Botan: Botan::ECDSA_PublicKey Class Reference

Botan::ECDSA_PublicKey::ECDSA_PublicKey	(	const AlgorithmIdentifier &	alg_id,
		const secure_vector< byte > &	key_bits
	)

inline

Definition at line 35 of file ecdsa.h.

37 :

EC_PublicKey(alg_id, key_bits) {}

Botan::ECDSA_PublicKey::ECDSA_PublicKey ( )

inlineprotected

Definition at line 58 of file ecdsa.h.

58 {}

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

inlinevirtual

Get this keys algorithm name.

Returns: this keys algorithm name ("ECDSA")

Implements Botan::Public_Key.

Definition at line 43 of file ecdsa.h.

Referenced by Botan::CVC_EAC::create_cvc_req(), and Botan::CVC_EAC::create_self_signed_cert().

43 { return "ECDSA"; }

AlgorithmIdentifier Botan::EC_PublicKey::algorithm_identifier ( ) const

virtualinherited

Returns: X.509 AlgorithmIdentifier for this key

Implements Botan::Public_Key.

Reimplemented in Botan::GOST_3410_PublicKey.

Definition at line 49 of file ecc_key.cpp.

References Botan::EC_PublicKey::DER_domain(), and Botan::Public_Key::get_oid().

Referenced by Botan::GOST_3410_PrivateKey::pkcs8_algorithm_identifier().

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

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

virtualinherited

Test the key values for consistency.

Parameters

rng	rng to use
strong	whether to perform strong and lengthy version of the test

Returns: true if the test is passed

Implements Botan::Public_Key.

Reimplemented in Botan::ECDSA_PrivateKey.

Definition at line 43 of file ecc_key.cpp.

References Botan::PointGFp::on_the_curve(), and Botan::EC_PublicKey::public_point().

    {
    return public_point().on_the_curve();
    }

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

inlineinherited

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

Definition at line 72 of file ecc_key.h.

Referenced by Botan::EC_PublicKey::algorithm_identifier().

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

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

inlineinherited

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 60 of file ecc_key.h.

Referenced by Botan::GOST_3410_PublicKey::algorithm_identifier(), Botan::EC_PrivateKey::EC_PrivateKey(), Botan::EC_PublicKey::EC_PublicKey(), Botan::ECDH_KA_Operation::ECDH_KA_Operation(), Botan::EC_PublicKey::estimated_strength(), and Botan::GOST_3410_PublicKey::GOST_3410_PublicKey().

60 { return domain_params; }

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 79 of file ecc_key.h.

80 { return domain_encoding; }

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::Public_Key.

Definition at line 20 of file ecc_key.cpp.

References Botan::BigInt::bits(), Botan::EC_PublicKey::domain(), Botan::EC_Group::get_curve(), and Botan::CurveGFp::get_p().

    {
    return domain().get_curve().get_p().bits() / 2;
    }

OID Botan::Public_Key::get_oid ( ) const

virtualinherited

Get the OID of the underlying public key scheme.

Returns: OID of the public key scheme

Definition at line 17 of file pk_keys.cpp.

References Botan::Public_Key::algo_name(), and Botan::OIDS::lookup().

Referenced by Botan::DL_Scheme_PublicKey::algorithm_identifier(), Botan::IF_Scheme_PublicKey::algorithm_identifier(), Botan::GOST_3410_PublicKey::algorithm_identifier(), and Botan::EC_PublicKey::algorithm_identifier().

    {
    try {
       return OIDS::lookup(algo_name());
       }
    catch(Lookup_Error)
       {
       throw Lookup_Error("PK algo " + algo_name() + " has no defined OIDs");
       }
    }

void Botan::Public_Key::load_check ( RandomNumberGenerator & rng ) const

protectedvirtualinherited

Self-test after loading a key

Parameters

rng	a random number generator

Reimplemented in Botan::Private_Key.

Definition at line 31 of file pk_keys.cpp.

References Botan::Public_Key::algo_name(), and Botan::Public_Key::check_key().

    {
    if(!check_key(rng, BOTAN_PUBLIC_KEY_STRONG_CHECKS_ON_LOAD))
       throw Invalid_Argument(algo_name() + ": Invalid public key");
    }

size_t Botan::ECDSA_PublicKey::max_input_bits ( ) const

inlinevirtual

Get the maximum number of bits allowed to be fed to this key. This is the bitlength of the order of the base point.

Returns: the maximum number of input bits

Implements Botan::Public_Key.

Definition at line 50 of file ecdsa.h.

50 { return domain().get_order().bits(); }

size_t Botan::ECDSA_PublicKey::message_part_size ( ) const

inlinevirtual

Find out the message part size supported by this scheme/key.

Returns: size of the message parts in bits

Reimplemented from Botan::Public_Key.

Definition at line 54 of file ecdsa.h.

55 { return domain().get_order().bytes(); }

size_t Botan::ECDSA_PublicKey::message_parts ( ) const

inlinevirtual

Find out the number of message parts supported by this scheme.

Returns: number of message parts

Reimplemented from Botan::Public_Key.

Definition at line 52 of file ecdsa.h.

52 { return 2; }

const PointGFp& Botan::EC_PublicKey::public_point ( ) const

inlineinherited

Get the public point of this key.

Exceptions

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

Returns: the public point of this key

Definition at line 45 of file ecc_key.h.

Referenced by Botan::EC_PublicKey::check_key(), Botan::ECDSA_PrivateKey::check_key(), Botan::EC_PublicKey::EC_PublicKey(), Botan::GOST_3410_PublicKey::x509_subject_public_key(), and Botan::EC_PublicKey::x509_subject_public_key().

45 { return public_key; }

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

Definition at line 59 of file ecc_key.cpp.

References Botan::EC_PublicKey::domain_encoding, Botan::EC_PublicKey::domain_params, Botan::EC_DOMPAR_ENC_EXPLICIT, Botan::EC_DOMPAR_ENC_IMPLICITCA, Botan::EC_DOMPAR_ENC_OID, and Botan::EC_Group::get_oid().

Referenced by Botan::DE_EAC::create_cvc_req(), Botan::DE_EAC::link_cvca(), and Botan::DE_EAC::sign_request().

    {
    if(form != EC_DOMPAR_ENC_EXPLICIT &&
       form != EC_DOMPAR_ENC_IMPLICITCA &&
       form != EC_DOMPAR_ENC_OID)
       throw Invalid_Argument("Invalid encoding form for EC-key object specified");
 
    if((form == EC_DOMPAR_ENC_OID) && (domain_params.get_oid() == ""))
       throw Invalid_Argument("Invalid encoding form OID specified for "
                              "EC-key object whose corresponding domain "
                              "parameters are without oid");
 
    domain_encoding = form;
    }

std::vector< byte > Botan::EC_PublicKey::x509_subject_public_key ( ) const

virtualinherited

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

Implements Botan::Public_Key.

Reimplemented in Botan::GOST_3410_PublicKey.

Definition at line 54 of file ecc_key.cpp.

References Botan::PointGFp::COMPRESSED, Botan::EC2OSP(), Botan::EC_PublicKey::public_point(), and Botan::unlock().

    {
    return unlock(EC2OSP(public_point(), PointGFp::COMPRESSED));
    }

EC_Group_Encoding Botan::EC_PublicKey::domain_encoding

protectedinherited

Definition at line 89 of file ecc_key.h.

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

EC_Group Botan::EC_PublicKey::domain_params

protectedinherited

Definition at line 87 of file ecc_key.h.

Referenced by Botan::EC_PrivateKey::EC_PrivateKey(), Botan::EC_PublicKey::EC_PublicKey(), Botan::GOST_3410_PublicKey::GOST_3410_PublicKey(), and Botan::EC_PublicKey::set_parameter_encoding().

PointGFp Botan::EC_PublicKey::public_key

protectedinherited

Definition at line 88 of file ecc_key.h.

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

Public Member Functions
std::string	algo_name () const

AlgorithmIdentifier	algorithm_identifier () const

bool	check_key (RandomNumberGenerator &rng, bool strong) const

std::vector< byte >	DER_domain () const

const EC_Group &	domain () const

EC_Group_Encoding	domain_format () const

	ECDSA_PublicKey (const EC_Group &dom_par, const PointGFp &public_point)

	ECDSA_PublicKey (const AlgorithmIdentifier &alg_id, const secure_vector< byte > &key_bits)

size_t	estimated_strength () const override

virtual OID	get_oid () const

size_t	max_input_bits () const

size_t	message_part_size () const

size_t	message_parts () const

const PointGFp &	public_point () const

void	set_parameter_encoding (EC_Group_Encoding enc)

std::vector< byte >	x509_subject_public_key () const

Protected Member Functions
	ECDSA_PublicKey ()

virtual void	load_check (RandomNumberGenerator &rng) const

dom_par	the domain parameters associated with this key
public_point	the public point defining this key

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation

Protected Attributes
EC_Group_Encoding	domain_encoding

EC_Group	domain_params

PointGFp	public_key