Botan
1.11.15
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#include <gost_3410.h>
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 |
size_t | estimated_strength () const override |
virtual OID | get_oid () const |
GOST_3410_PublicKey (const EC_Group &dom_par, const PointGFp &public_point) | |
GOST_3410_PublicKey (const AlgorithmIdentifier &alg_id, const secure_vector< byte > &key_bits) | |
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 | |
GOST_3410_PublicKey () | |
virtual void | load_check (RandomNumberGenerator &rng) const |
Protected Attributes | |
EC_Group_Encoding | domain_encoding |
EC_Group | domain_params |
PointGFp | public_key |
GOST-34.10 Public Key
Definition at line 20 of file gost_3410.h.
Botan::GOST_3410_PublicKey::GOST_3410_PublicKey | ( | const EC_Group & | dom_par, |
const PointGFp & | public_point | ||
) | [inline] |
Construct a public key from a given public point.
dom_par | the domain parameters associated with this key |
public_point | the public point defining this key |
Definition at line 29 of file gost_3410.h.
: EC_PublicKey(dom_par, public_point) {}
Botan::GOST_3410_PublicKey::GOST_3410_PublicKey | ( | const AlgorithmIdentifier & | alg_id, |
const secure_vector< byte > & | key_bits | ||
) |
Construct from X.509 algorithm id and subject public key bits
Definition at line 51 of file gost_3410.cpp.
References BOTAN_ASSERT, Botan::BER_Decoder::decode(), Botan::EC_PublicKey::domain(), Botan::EC_PublicKey::domain_params, Botan::OCTET_STRING, Botan::PointGFp::on_the_curve(), Botan::AlgorithmIdentifier::parameters, Botan::EC_PublicKey::public_key, Botan::SEQUENCE, Botan::BER_Decoder::start_cons(), x, and y.
{ OID ecc_param_id; // Also includes hash and cipher OIDs... brilliant design guys BER_Decoder(alg_id.parameters).start_cons(SEQUENCE).decode(ecc_param_id); domain_params = EC_Group(ecc_param_id); secure_vector<byte> bits; BER_Decoder(key_bits).decode(bits, OCTET_STRING); const size_t part_size = bits.size() / 2; // Keys are stored in little endian format (WTF) for(size_t i = 0; i != part_size / 2; ++i) { std::swap(bits[i], bits[part_size-1-i]); std::swap(bits[part_size+i], bits[2*part_size-1-i]); } BigInt x(&bits[0], part_size); BigInt y(&bits[part_size], part_size); public_key = PointGFp(domain().get_curve(), x, y); BOTAN_ASSERT(public_key.on_the_curve(), "Loaded GOST 34.10 public key is on the curve"); }
Botan::GOST_3410_PublicKey::GOST_3410_PublicKey | ( | ) | [inline, protected] |
Definition at line 63 of file gost_3410.h.
{}
std::string Botan::GOST_3410_PublicKey::algo_name | ( | ) | const [inline, virtual] |
Get this keys algorithm name.
Implements Botan::Public_Key.
Definition at line 43 of file gost_3410.h.
{ return "GOST-34.10"; }
AlgorithmIdentifier Botan::GOST_3410_PublicKey::algorithm_identifier | ( | ) | const [virtual] |
Reimplemented from Botan::EC_PublicKey.
Definition at line 40 of file gost_3410.cpp.
References Botan::EC_PublicKey::domain(), Botan::DER_Encoder::encode(), Botan::DER_Encoder::end_cons(), Botan::DER_Encoder::get_contents_unlocked(), Botan::Public_Key::get_oid(), Botan::SEQUENCE, and Botan::DER_Encoder::start_cons().
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 algorithm_identifier(), Botan::EC_PrivateKey::EC_PrivateKey(), Botan::EC_PublicKey::EC_PublicKey(), Botan::EC_PublicKey::estimated_strength(), and 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()); }
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(), 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"); }
size_t Botan::GOST_3410_PublicKey::max_input_bits | ( | ) | const [inline, virtual] |
Get the maximum number of bits allowed to be fed to this key. This is the bitlength of the order of the base point.
Implements Botan::Public_Key.
Definition at line 55 of file gost_3410.h.
size_t Botan::GOST_3410_PublicKey::message_part_size | ( | ) | const [inline, virtual] |
Find out the message part size supported by this scheme/key.
Reimplemented from Botan::Public_Key.
Definition at line 59 of file gost_3410.h.
size_t Botan::GOST_3410_PublicKey::message_parts | ( | ) | const [inline, virtual] |
Find out the number of message parts supported by this scheme.
Reimplemented from Botan::Public_Key.
Definition at line 57 of file gost_3410.h.
{ return 2; }
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(), 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::GOST_3410_PublicKey::x509_subject_public_key | ( | ) | const [virtual] |
Reimplemented from Botan::EC_PublicKey.
Definition at line 17 of file gost_3410.cpp.
References Botan::BigInt::binary_encode(), Botan::BigInt::bytes(), Botan::DER_Encoder::encode(), Botan::PointGFp::get_affine_x(), Botan::PointGFp::get_affine_y(), Botan::DER_Encoder::get_contents_unlocked(), Botan::OCTET_STRING, Botan::EC_PublicKey::public_point(), x, and y.
{ // Trust CryptoPro to come up with something obnoxious const BigInt x = public_point().get_affine_x(); const BigInt y = public_point().get_affine_y(); size_t part_size = std::max(x.bytes(), y.bytes()); std::vector<byte> bits(2*part_size); x.binary_encode(&bits[part_size - x.bytes()]); y.binary_encode(&bits[2*part_size - y.bytes()]); // Keys are stored in little endian format (WTF) for(size_t i = 0; i != part_size / 2; ++i) { std::swap(bits[i], bits[part_size-1-i]); std::swap(bits[part_size+i], bits[2*part_size-1-i]); } return DER_Encoder().encode(bits, OCTET_STRING).get_contents_unlocked(); }
EC_Group_Encoding Botan::EC_PublicKey::domain_encoding [protected, inherited] |
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 [protected, inherited] |
Definition at line 87 of file ecc_key.h.
Referenced by Botan::EC_PrivateKey::EC_PrivateKey(), Botan::EC_PublicKey::EC_PublicKey(), GOST_3410_PublicKey(), and Botan::EC_PublicKey::set_parameter_encoding().
PointGFp Botan::EC_PublicKey::public_key [protected, inherited] |
Definition at line 88 of file ecc_key.h.
Referenced by Botan::EC_PrivateKey::EC_PrivateKey(), Botan::EC_PublicKey::EC_PublicKey(), and GOST_3410_PublicKey().