Botan
1.11.15
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#include <ecc_key.h>
Public Member Functions | |
virtual std::string | algo_name () const =0 |
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 |
EC_PublicKey (const EC_Group &dom_par, const PointGFp &pub_point) | |
EC_PublicKey (const AlgorithmIdentifier &alg_id, const secure_vector< byte > &key_bits) | |
size_t | estimated_strength () const override |
virtual OID | get_oid () const |
virtual size_t | max_input_bits () const =0 |
virtual size_t | message_part_size () const |
virtual 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 | |
EC_PublicKey () | |
virtual void | load_check (RandomNumberGenerator &rng) const |
Protected Attributes | |
EC_Group_Encoding | domain_encoding |
EC_Group | domain_params |
PointGFp | public_key |
This class represents abstract ECC public keys. When encoding a key via an encoder that can be accessed via the corresponding member functions, the key will decide upon its internally stored encoding information whether to encode itself with or without domain parameters, or using the domain parameter oid. Furthermore, a public key without domain parameters can be decoded. In that case, it cannot be used for verification until its domain parameters are set by calling the corresponding member function.
Botan::EC_PublicKey::EC_PublicKey | ( | const EC_Group & | dom_par, |
const PointGFp & | pub_point | ||
) |
Definition at line 26 of file ecc_key.cpp.
References domain(), and public_point().
: domain_params(dom_par), public_key(pub_point), domain_encoding(EC_DOMPAR_ENC_EXPLICIT) { if(domain().get_curve() != public_point().get_curve()) throw Invalid_Argument("EC_PublicKey: curve mismatch in constructor"); }
Botan::EC_PublicKey::EC_PublicKey | ( | const AlgorithmIdentifier & | alg_id, |
const secure_vector< byte > & | key_bits | ||
) |
Definition at line 35 of file ecc_key.cpp.
References domain(), domain_encoding, domain_params, Botan::EC_DOMPAR_ENC_EXPLICIT, Botan::OS2ECP(), Botan::AlgorithmIdentifier::parameters, and public_key.
{ domain_params = EC_Group(alg_id.parameters); domain_encoding = EC_DOMPAR_ENC_EXPLICIT; public_key = OS2ECP(key_bits, domain().get_curve()); }
Botan::EC_PublicKey::EC_PublicKey | ( | ) | [inline, protected] |
virtual std::string Botan::Public_Key::algo_name | ( | ) | const [pure virtual, inherited] |
Get the name of the underlying public key scheme.
Implemented in Botan::GOST_3410_PublicKey, Botan::ECDH_PublicKey, Botan::ECDSA_PublicKey, Botan::McEliece_PublicKey, Botan::RSA_PublicKey, Botan::DH_PublicKey, Botan::DSA_PublicKey, Botan::ElGamal_PublicKey, Botan::NR_PublicKey, Botan::RW_PublicKey, and Botan::Curve25519_PublicKey.
Referenced by Botan::PKCS8::BER_encode(), Botan::EAC_Signed_Object::check_signature(), Botan::X509_Object::check_signature(), Botan::TLS::Handshake_State::choose_sig_format(), Botan::choose_sig_format(), Botan::TLS::Client_Key_Exchange::Client_Key_Exchange(), Botan::find_constraints(), Botan::Private_Key::gen_check(), Botan::Public_Key::get_oid(), Botan::Public_Key::load_check(), Botan::Private_Key::load_check(), Botan::PK_Encryptor_EME::PK_Encryptor_EME(), Botan::PK_Key_Agreement::PK_Key_Agreement(), Botan::PK_Signer::PK_Signer(), Botan::PK_Verifier::PK_Verifier(), and Botan::TLS::Handshake_State::understand_sig_format().
AlgorithmIdentifier Botan::EC_PublicKey::algorithm_identifier | ( | ) | const [virtual] |
Implements Botan::Public_Key.
Reimplemented in Botan::GOST_3410_PublicKey.
Definition at line 50 of file ecc_key.cpp.
References 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 [virtual] |
Test the key values for consistency.
rng | rng to use |
strong | whether to perform strong and lengthy version of the test |
Implements Botan::Public_Key.
Reimplemented in Botan::ECDSA_PrivateKey.
Definition at line 44 of file ecc_key.cpp.
References Botan::PointGFp::on_the_curve(), and public_point().
{ return public_point().on_the_curve(); }
std::vector<byte> Botan::EC_PublicKey::DER_domain | ( | ) | const [inline] |
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 algorithm_identifier().
{ return domain().DER_encode(domain_format()); }
const EC_Group& Botan::EC_PublicKey::domain | ( | ) | const [inline] |
Get the domain parameters of this key.
Invalid_State | is thrown if the domain parameters of this point are not set |
Definition at line 60 of file ecc_key.h.
Referenced by Botan::GOST_3410_PublicKey::algorithm_identifier(), Botan::EC_PrivateKey::EC_PrivateKey(), EC_PublicKey(), estimated_strength(), and Botan::GOST_3410_PublicKey::GOST_3410_PublicKey().
{ return domain_params; }
EC_Group_Encoding Botan::EC_PublicKey::domain_format | ( | ) | const [inline] |
Get the domain parameter encoding to be used when encoding this key.
Definition at line 79 of file ecc_key.h.
{ return domain_encoding; }
size_t Botan::EC_PublicKey::estimated_strength | ( | ) | const [override, virtual] |
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.
Implements Botan::Public_Key.
Definition at line 21 of file ecc_key.cpp.
References domain(), and Botan::ecp_work_factor().
{ return ecp_work_factor(domain().get_curve().get_p().bits()); }
OID Botan::Public_Key::get_oid | ( | ) | const [virtual, inherited] |
Get the OID of the underlying 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::Curve25519_PublicKey::algorithm_identifier(), Botan::IF_Scheme_PublicKey::algorithm_identifier(), Botan::GOST_3410_PublicKey::algorithm_identifier(), algorithm_identifier(), and Botan::McEliece_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 [protected, virtual, inherited] |
Self-test after loading a key
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"); }
virtual size_t Botan::Public_Key::max_input_bits | ( | ) | const [pure virtual, inherited] |
Get the maximum message size in bits supported by this public key.
Implemented in Botan::McEliece_PrivateKey, Botan::GOST_3410_PublicKey, Botan::ECDH_PublicKey, Botan::ECDSA_PublicKey, Botan::IF_Scheme_PublicKey, Botan::McEliece_PublicKey, Botan::NR_PublicKey, Botan::DSA_PublicKey, Botan::DH_PublicKey, Botan::ElGamal_PublicKey, and Botan::Curve25519_PublicKey.
Referenced by Botan::choose_sig_format().
virtual size_t Botan::Public_Key::message_part_size | ( | ) | const [inline, virtual, inherited] |
Find out the message part size supported by this scheme/key.
Reimplemented in Botan::GOST_3410_PublicKey, Botan::ECDSA_PublicKey, Botan::NR_PublicKey, and Botan::DSA_PublicKey.
Definition at line 67 of file pk_keys.h.
{ return 0; }
virtual size_t Botan::Public_Key::message_parts | ( | ) | const [inline, virtual, inherited] |
Find out the number of message parts supported by this scheme.
Reimplemented in Botan::GOST_3410_PublicKey, Botan::ECDSA_PublicKey, Botan::NR_PublicKey, and Botan::DSA_PublicKey.
Definition at line 61 of file pk_keys.h.
Referenced by Botan::EAC_Signed_Object::check_signature(), Botan::X509_Object::check_signature(), and Botan::choose_sig_format().
{ return 1; }
const PointGFp& Botan::EC_PublicKey::public_point | ( | ) | const [inline] |
Get the public point of this key.
Invalid_State | is thrown if the domain parameters of this point are not set |
Definition at line 45 of file ecc_key.h.
Referenced by check_key(), Botan::ECDSA_PrivateKey::check_key(), EC_PublicKey(), Botan::GOST_3410_PublicKey::x509_subject_public_key(), and x509_subject_public_key().
{ return public_key; }
Set the domain parameter encoding to be used when encoding this key.
enc | the encoding to use |
Definition at line 60 of file ecc_key.cpp.
References domain_encoding, 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 [virtual] |
Implements Botan::Public_Key.
Reimplemented in Botan::GOST_3410_PublicKey.
Definition at line 55 of file ecc_key.cpp.
References Botan::PointGFp::COMPRESSED, Botan::EC2OSP(), public_point(), and Botan::unlock().
{ return unlock(EC2OSP(public_point(), PointGFp::COMPRESSED)); }
Definition at line 89 of file ecc_key.h.
Referenced by Botan::EC_PrivateKey::EC_PrivateKey(), EC_PublicKey(), and set_parameter_encoding().
EC_Group Botan::EC_PublicKey::domain_params [protected] |
Definition at line 87 of file ecc_key.h.
Referenced by Botan::EC_PrivateKey::EC_PrivateKey(), EC_PublicKey(), Botan::GOST_3410_PublicKey::GOST_3410_PublicKey(), and set_parameter_encoding().
PointGFp Botan::EC_PublicKey::public_key [protected] |
Definition at line 88 of file ecc_key.h.
Referenced by Botan::EC_PrivateKey::EC_PrivateKey(), EC_PublicKey(), and Botan::GOST_3410_PublicKey::GOST_3410_PublicKey().