Botan
1.11.15
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#include <ecc_key.h>
Botan::EC_PrivateKey::EC_PrivateKey | ( | RandomNumberGenerator & | rng, |
const EC_Group & | ec_group, | ||
const BigInt & | x | ||
) |
EC_PrivateKey constructor
Definition at line 86 of file ecc_key.cpp.
References BOTAN_ASSERT, Botan::EC_PublicKey::domain(), Botan::EC_PublicKey::domain_encoding, Botan::EC_PublicKey::domain_params, Botan::EC_DOMPAR_ENC_EXPLICIT, Botan::EC_Group::get_base_point(), Botan::PointGFp::on_the_curve(), private_key, Botan::EC_PublicKey::public_key, Botan::BigInt::random_integer(), and x.
{ domain_params = ec_group; domain_encoding = EC_DOMPAR_ENC_EXPLICIT; if(x == 0) private_key = BigInt::random_integer(rng, 1, domain().get_order()); else private_key = x; public_key = domain().get_base_point() * private_key; BOTAN_ASSERT(public_key.on_the_curve(), "Generated public key point was on the curve"); }
Botan::EC_PrivateKey::EC_PrivateKey | ( | const AlgorithmIdentifier & | alg_id, |
const secure_vector< byte > & | key_bits | ||
) |
Definition at line 115 of file ecc_key.cpp.
References Botan::BIT_STRING, BOTAN_ASSERT, Botan::BER_Decoder::decode_and_check(), Botan::BER_Decoder::decode_optional(), Botan::BER_Decoder::decode_optional_string(), Botan::EC_PublicKey::domain(), Botan::EC_PublicKey::domain_encoding, Botan::EC_PublicKey::domain_params, Botan::EC_DOMPAR_ENC_EXPLICIT, Botan::OID::empty(), Botan::BER_Decoder::end_cons(), Botan::EC_Group::get_base_point(), Botan::AlgorithmIdentifier::oid, Botan::PointGFp::on_the_curve(), Botan::OS2ECP(), Botan::AlgorithmIdentifier::parameters, Botan::PRIVATE, private_key, Botan::EC_PublicKey::public_key, Botan::SEQUENCE, and Botan::BER_Decoder::start_cons().
{ domain_params = EC_Group(alg_id.parameters); domain_encoding = EC_DOMPAR_ENC_EXPLICIT; OID key_parameters; secure_vector<byte> public_key_bits; BER_Decoder(key_bits) .start_cons(SEQUENCE) .decode_and_check<size_t>(1, "Unknown version code for ECC key") .decode_octet_string_bigint(private_key) .decode_optional(key_parameters, ASN1_Tag(0), PRIVATE) .decode_optional_string(public_key_bits, BIT_STRING, 1, PRIVATE) .end_cons(); if(!key_parameters.empty() && key_parameters != alg_id.oid) throw Decoding_Error("EC_PrivateKey - inner and outer OIDs did not match"); if(public_key_bits.empty()) { public_key = domain().get_base_point() * private_key; BOTAN_ASSERT(public_key.on_the_curve(), "Public point derived from loaded key was on the curve"); } else { public_key = OS2ECP(public_key_bits, domain().get_curve()); // OS2ECP verifies that the point is on the curve } }
Botan::EC_PrivateKey::EC_PrivateKey | ( | ) | [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, inherited] |
Implements Botan::Public_Key.
Reimplemented in Botan::GOST_3410_PublicKey.
Definition at line 50 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 [virtual, inherited] |
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 Botan::EC_PublicKey::public_point().
{ return public_point().on_the_curve(); }
std::vector<byte> Botan::EC_PublicKey::DER_domain | ( | ) | const [inline, inherited] |
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().
{ return domain().DER_encode(domain_format()); }
const EC_Group& Botan::EC_PublicKey::domain | ( | ) | const [inline, inherited] |
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(), EC_PrivateKey(), Botan::EC_PublicKey::EC_PublicKey(), Botan::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, inherited] |
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, inherited] |
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 Botan::EC_PublicKey::domain(), and Botan::ecp_work_factor().
{ return ecp_work_factor(domain().get_curve().get_p().bits()); }
void Botan::Private_Key::gen_check | ( | RandomNumberGenerator & | rng | ) | const [protected, inherited] |
Self-test after generating a key
rng | a random number generator |
Definition at line 49 of file pk_keys.cpp.
References Botan::Public_Key::algo_name(), and Botan::Public_Key::check_key().
Referenced by Botan::DH_PrivateKey::DH_PrivateKey(), Botan::DSA_PrivateKey::DSA_PrivateKey(), Botan::ElGamal_PrivateKey::ElGamal_PrivateKey(), Botan::NR_PrivateKey::NR_PrivateKey(), Botan::RSA_PrivateKey::RSA_PrivateKey(), and Botan::RW_PrivateKey::RW_PrivateKey().
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(), Botan::EC_PublicKey::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"); }
void Botan::Private_Key::load_check | ( | RandomNumberGenerator & | rng | ) | const [protected, virtual, inherited] |
Self-test after loading a key
rng | a random number generator |
Reimplemented from Botan::Public_Key.
Definition at line 40 of file pk_keys.cpp.
References Botan::Public_Key::algo_name(), and Botan::Public_Key::check_key().
Referenced by Botan::Curve25519_PrivateKey::Curve25519_PrivateKey(), Botan::DH_PrivateKey::DH_PrivateKey(), Botan::DSA_PrivateKey::DSA_PrivateKey(), Botan::ElGamal_PrivateKey::ElGamal_PrivateKey(), Botan::IF_Scheme_PrivateKey::IF_Scheme_PrivateKey(), and Botan::NR_PrivateKey::NR_PrivateKey().
{ if(!check_key(rng, BOTAN_PRIVATE_KEY_STRONG_CHECKS_ON_LOAD)) throw Invalid_Argument(algo_name() + ": Invalid private 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; }
virtual AlgorithmIdentifier Botan::Private_Key::pkcs8_algorithm_identifier | ( | ) | const [inline, virtual, inherited] |
Reimplemented in Botan::GOST_3410_PrivateKey.
Definition at line 109 of file pk_keys.h.
Referenced by Botan::PKCS8::BER_encode().
{ return algorithm_identifier(); }
secure_vector< byte > Botan::EC_PrivateKey::pkcs8_private_key | ( | ) | const [virtual] |
Implements Botan::Private_Key.
Definition at line 104 of file ecc_key.cpp.
References Botan::BigInt::bytes(), Botan::DER_Encoder::encode(), Botan::BigInt::encode_1363(), Botan::DER_Encoder::end_cons(), Botan::DER_Encoder::get_contents(), Botan::OCTET_STRING, private_key, Botan::SEQUENCE, and Botan::DER_Encoder::start_cons().
{ return DER_Encoder() .start_cons(SEQUENCE) .encode(static_cast<size_t>(1)) .encode(BigInt::encode_1363(private_key, private_key.bytes()), OCTET_STRING) .end_cons() .get_contents(); }
const BigInt & Botan::EC_PrivateKey::private_value | ( | ) | const |
Get the private key value of this key object.
Definition at line 75 of file ecc_key.cpp.
References private_key.
{ if(private_key == 0) throw Invalid_State("EC_PrivateKey::private_value - uninitialized"); return private_key; }
const PointGFp& Botan::EC_PublicKey::public_point | ( | ) | const [inline, inherited] |
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 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().
{ 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.
enc | the encoding to use |
Definition at line 60 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 [virtual, inherited] |
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(), Botan::EC_PublicKey::public_point(), and Botan::unlock().
{ return unlock(EC2OSP(public_point(), PointGFp::COMPRESSED)); }
EC_Group_Encoding Botan::EC_PublicKey::domain_encoding [protected, inherited] |
Definition at line 89 of file ecc_key.h.
Referenced by EC_PrivateKey(), Botan::EC_PublicKey::EC_PublicKey(), and Botan::EC_PublicKey::set_parameter_encoding().
EC_Group Botan::EC_PublicKey::domain_params [protected, inherited] |
Definition at line 87 of file ecc_key.h.
Referenced by EC_PrivateKey(), Botan::EC_PublicKey::EC_PublicKey(), Botan::GOST_3410_PublicKey::GOST_3410_PublicKey(), and Botan::EC_PublicKey::set_parameter_encoding().
BigInt Botan::EC_PrivateKey::private_key [protected] |
Definition at line 116 of file ecc_key.h.
Referenced by EC_PrivateKey(), pkcs8_private_key(), and private_value().
PointGFp Botan::EC_PublicKey::public_key [protected, inherited] |
Definition at line 88 of file ecc_key.h.
Referenced by EC_PrivateKey(), Botan::EC_PublicKey::EC_PublicKey(), and Botan::GOST_3410_PublicKey::GOST_3410_PublicKey().