Botan 3.0.0-alpha0
Crypto and TLS for C&
|
#include <elgamal.h>
Public Member Functions | |
std::string | algo_name () const override |
AlgorithmIdentifier | algorithm_identifier () const override |
bool | check_key (RandomNumberGenerator &rng, bool) const override |
std::unique_ptr< PK_Ops::Encryption > | create_encryption_op (RandomNumberGenerator &rng, const std::string ¶ms, const std::string &provider) const override |
virtual std::unique_ptr< PK_Ops::KEM_Encryption > | create_kem_encryption_op (RandomNumberGenerator &rng, const std::string ¶ms, const std::string &provider) const |
virtual std::unique_ptr< PK_Ops::Verification > | create_verification_op (const std::string ¶ms, const std::string &provider) const |
virtual Signature_Format | default_x509_signature_format () const |
ElGamal_PublicKey (const AlgorithmIdentifier &alg_id, const std::vector< uint8_t > &key_bits) | |
ElGamal_PublicKey (const DL_Group &group, const BigInt &y) | |
size_t | estimated_strength () const override |
std::string | fingerprint_public (const std::string &alg="SHA-256") const |
const DL_Group & | get_domain () const |
const DL_Group & | get_group () const |
virtual OID | get_oid () const |
const BigInt & | get_y () const |
DL_Group_Format | group_format () const override |
const BigInt & | group_g () const |
const BigInt & | group_p () const |
const BigInt & | group_q () const |
size_t | key_length () const override |
virtual size_t | message_part_size () const |
virtual size_t | message_parts () const |
std::vector< uint8_t > | public_key_bits () const override |
std::vector< uint8_t > | subject_public_key () const |
Protected Member Functions | |
ElGamal_PublicKey ()=default | |
Protected Attributes | |
DL_Group | m_group |
BigInt | m_y |
|
inline |
Load a public key.
alg_id | the X.509 algorithm identifier |
key_bits | DER encoded public key bits |
Definition at line 29 of file elgamal.h.
References Botan::ANSI_X9_42.
Create a public key.
group | the underlying DL group |
y | the public value y = g^x mod p |
Definition at line 19 of file elgamal.cpp.
|
protecteddefault |
|
inlineoverridevirtual |
Get the name of the underlying public key scheme.
Implements Botan::Public_Key.
Definition at line 21 of file elgamal.h.
Referenced by Botan::ElGamal_PrivateKey::create_decryption_op(), and create_encryption_op().
|
overridevirtualinherited |
Implements Botan::Public_Key.
Definition at line 25 of file dl_algo.cpp.
References Botan::DL_Group::DER_encode(), Botan::Public_Key::get_oid(), Botan::DL_Scheme_PublicKey::group_format(), and Botan::DL_Scheme_PublicKey::m_group.
|
overridevirtualinherited |
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::DSA_PrivateKey, Botan::DL_Scheme_PrivateKey, and Botan::ElGamal_PrivateKey.
Definition at line 69 of file dl_algo.cpp.
References Botan::DL_Scheme_PublicKey::m_group, Botan::DL_Scheme_PublicKey::m_y, Botan::DL_Group::verify_group(), and Botan::DL_Group::verify_public_element().
|
overridevirtual |
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
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::Public_Key.
Definition at line 201 of file elgamal.cpp.
References algo_name().
|
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
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::Kyber_PublicKey, Botan::McEliece_PublicKey, and Botan::RSA_PublicKey.
Definition at line 99 of file pk_keys.cpp.
References Botan::Public_Key::algo_name().
Referenced by Botan::PK_KEM_Encryptor::PK_KEM_Encryptor().
|
virtualinherited |
This is an internal library function exposed on key types. In almost all cases applications should use wrappers in pubkey.h
Return a verification operation for this key/params or throw
params | additional parameters |
provider | the provider to use |
Reimplemented in Botan::XMSS_PublicKey, Botan::DSA_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, Botan::Ed25519_PublicKey, Botan::GOST_3410_PublicKey, Botan::RSA_PublicKey, Botan::SM2_PublicKey, and Botan::XMSS_WOTS_Addressed_PublicKey.
Definition at line 107 of file pk_keys.cpp.
References Botan::Public_Key::algo_name().
Referenced by Botan::XMSS_WOTS_Addressed_PublicKey::create_verification_op(), and Botan::PK_Verifier::PK_Verifier().
|
inlinevirtualinherited |
Reimplemented in Botan::GOST_3410_PublicKey.
Definition at line 125 of file pk_keys.h.
References Botan::DER_SEQUENCE, and Botan::IEEE_1363.
Referenced by Botan::X509_Object::choose_sig_format(), and Botan::X509_Object::verify_signature().
|
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.
Implements Botan::Public_Key.
Definition at line 20 of file dl_algo.cpp.
References Botan::DL_Group::estimated_strength(), and Botan::DL_Scheme_PublicKey::m_group.
|
inherited |
Definition at line 77 of file pk_keys.cpp.
References Botan::create_hex_fingerprint(), hash_algo, and Botan::Public_Key::subject_public_key().
|
inlineinherited |
|
inlineinherited |
Get the DL domain parameters of this key.
Definition at line 38 of file dl_algo.h.
Referenced by Botan::DH_PrivateKey::public_key(), Botan::DSA_PrivateKey::public_key(), and Botan::ElGamal_PrivateKey::public_key().
|
virtualinherited |
Get the OID of the underlying public key scheme.
Reimplemented in Botan::XMSS_WOTS_Addressed_PublicKey.
Definition at line 53 of file pk_keys.cpp.
References Botan::Public_Key::algo_name(), Botan::OID::empty(), and Botan::OIDS::str2oid_or_empty().
Referenced by Botan::TPM_PrivateKey::algorithm_identifier(), Botan::Curve25519_PublicKey::algorithm_identifier(), Botan::DL_Scheme_PublicKey::algorithm_identifier(), Botan::EC_PublicKey::algorithm_identifier(), Botan::Ed25519_PublicKey::algorithm_identifier(), Botan::GOST_3410_PublicKey::algorithm_identifier(), Botan::Kyber_PublicKey::algorithm_identifier(), Botan::McEliece_PublicKey::algorithm_identifier(), Botan::RSA_PublicKey::algorithm_identifier(), and Botan::XMSS_WOTS_Addressed_PublicKey::get_oid().
|
inlineinherited |
Get the public value y with y = g^x mod p where x is the secret key.
Definition at line 43 of file dl_algo.h.
Referenced by Botan::DH_PrivateKey::public_key(), Botan::DSA_PrivateKey::public_key(), and Botan::ElGamal_PrivateKey::public_key().
|
inlineoverridevirtual |
Get the underlying groups encoding format.
Implements Botan::DL_Scheme_PublicKey.
Definition at line 22 of file elgamal.h.
References Botan::ANSI_X9_42.
|
inlineinherited |
|
inlineinherited |
Get the prime p of the underlying DL group.
Definition at line 49 of file dl_algo.h.
Referenced by Botan::DH_PublicKey::public_value().
|
inlineinherited |
Get the prime q of the underlying DL group.
Definition at line 55 of file dl_algo.h.
Referenced by Botan::DSA_PrivateKey::check_key(), Botan::DSA_PrivateKey::DSA_PrivateKey(), and Botan::DSA_PublicKey::DSA_PublicKey().
|
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 15 of file dl_algo.cpp.
References Botan::DL_Scheme_PublicKey::m_group, and Botan::DL_Group::p_bits().
|
inlinevirtualinherited |
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.
Reimplemented in Botan::DSA_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, Botan::GOST_3410_PublicKey, and Botan::SM2_PublicKey.
Definition at line 123 of file pk_keys.h.
Referenced by Botan::PK_Signer::PK_Signer(), and Botan::PK_Verifier::PK_Verifier().
|
inlinevirtualinherited |
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.
Reimplemented in Botan::DSA_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, Botan::GOST_3410_PublicKey, and Botan::SM2_PublicKey.
Definition at line 112 of file pk_keys.h.
Referenced by Botan::PK_Signer::PK_Signer(), and Botan::PK_Verifier::PK_Verifier().
|
overridevirtualinherited |
Implements Botan::Public_Key.
Definition at line 31 of file dl_algo.cpp.
References Botan::DER_Encoder::encode(), and Botan::DL_Scheme_PublicKey::m_y.
|
inherited |
Definition at line 38 of file pk_keys.cpp.
References Botan::Public_Key::algorithm_identifier(), Botan::BitString, Botan::DER_Encoder::encode(), Botan::DER_Encoder::end_cons(), Botan::Public_Key::public_key_bits(), and Botan::DER_Encoder::start_sequence().
Referenced by Botan::X509::BER_encode(), Botan::PKCS10_Request::create(), Botan::Public_Key::fingerprint_public(), and Botan::X509::PEM_encode().
|
protectedinherited |
The DL group
Definition at line 97 of file dl_algo.h.
Referenced by Botan::DL_Scheme_PublicKey::algorithm_identifier(), Botan::DL_Scheme_PublicKey::check_key(), Botan::DL_Scheme_PrivateKey::check_key(), Botan::DH_PrivateKey::DH_PrivateKey(), Botan::DH_PublicKey::DH_PublicKey(), Botan::DL_Scheme_PrivateKey::DL_Scheme_PrivateKey(), Botan::DSA_PrivateKey::DSA_PrivateKey(), Botan::DSA_PublicKey::DSA_PublicKey(), Botan::ElGamal_PrivateKey::ElGamal_PrivateKey(), Botan::DL_Scheme_PublicKey::estimated_strength(), and Botan::DL_Scheme_PublicKey::key_length().
|
protectedinherited |
The DL public key
Definition at line 92 of file dl_algo.h.
Referenced by Botan::DL_Scheme_PublicKey::check_key(), Botan::DL_Scheme_PrivateKey::check_key(), Botan::DH_PrivateKey::DH_PrivateKey(), Botan::DH_PublicKey::DH_PublicKey(), Botan::DSA_PrivateKey::DSA_PrivateKey(), Botan::DSA_PublicKey::DSA_PublicKey(), Botan::ElGamal_PrivateKey::ElGamal_PrivateKey(), Botan::DL_Scheme_PublicKey::public_key_bits(), and Botan::DH_PublicKey::public_value().