Botan 3.5.0
Crypto and TLS for C&
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#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::Decryption > | create_decryption_op (RandomNumberGenerator &rng, std::string_view params, std::string_view provider) const override |
std::unique_ptr< PK_Ops::Encryption > | create_encryption_op (RandomNumberGenerator &rng, std::string_view params, std::string_view provider) const override |
virtual std::unique_ptr< PK_Ops::KEM_Decryption > | create_kem_decryption_op (RandomNumberGenerator &rng, std::string_view params, std::string_view provider) const |
virtual std::unique_ptr< PK_Ops::KEM_Encryption > | create_kem_encryption_op (std::string_view params, std::string_view provider) const |
virtual std::unique_ptr< PK_Ops::Key_Agreement > | create_key_agreement_op (RandomNumberGenerator &rng, std::string_view params, std::string_view provider) const |
virtual std::unique_ptr< PK_Ops::Signature > | create_signature_op (RandomNumberGenerator &rng, std::string_view params, std::string_view provider) const |
virtual std::unique_ptr< PK_Ops::Verification > | create_verification_op (std::string_view params, std::string_view provider) const |
virtual std::unique_ptr< PK_Ops::Verification > | create_x509_verification_op (const AlgorithmIdentifier &signature_algorithm, std::string_view provider) const |
virtual Signature_Format | default_x509_signature_format () const |
ElGamal_PrivateKey (const AlgorithmIdentifier &alg_id, std::span< const uint8_t > key_bits) | |
ElGamal_PrivateKey (const DL_Group &group, const BigInt &private_key) | |
ElGamal_PrivateKey (RandomNumberGenerator &rng, const DL_Group &group) | |
size_t | estimated_strength () const override |
std::string | fingerprint_private (std::string_view alg) const |
std::string | fingerprint_public (std::string_view alg="SHA-256") const |
std::unique_ptr< Private_Key > | generate_another (RandomNumberGenerator &rng) const final |
const BigInt & | get_int_field (std::string_view field) const override |
OID | get_oid () const |
size_t | key_length () const override |
virtual size_t | message_part_size () const |
virtual size_t | message_parts () const |
virtual OID | object_identifier () const |
virtual AlgorithmIdentifier | pkcs8_algorithm_identifier () const |
secure_vector< uint8_t > | private_key_bits () const override |
secure_vector< uint8_t > | private_key_info () const |
std::unique_ptr< Public_Key > | public_key () const override |
std::vector< uint8_t > | public_key_bits () const override |
secure_vector< uint8_t > | raw_private_key_bits () const override |
std::vector< uint8_t > | raw_public_key_bits () const override |
virtual std::optional< uint64_t > | remaining_operations () const |
Retrieves the number of remaining operations if this is a stateful private key. | |
virtual bool | stateful_operation () const |
std::vector< uint8_t > | subject_public_key () const |
bool | supports_operation (PublicKeyOperation op) const override |
Botan::ElGamal_PrivateKey::ElGamal_PrivateKey | ( | const AlgorithmIdentifier & | alg_id, |
std::span< const uint8_t > | key_bits ) |
Load a private key from the ASN.1 encoding
alg_id | the X.509 algorithm identifier |
key_bits | DER encoded key bits in ANSI X9.42 format |
Definition at line 68 of file elgamal.cpp.
References Botan::ANSI_X9_42.
Botan::ElGamal_PrivateKey::ElGamal_PrivateKey | ( | RandomNumberGenerator & | rng, |
const DL_Group & | group ) |
Create a new random private key.
rng | random number generator to use |
group | the group to be used in the key |
Definition at line 58 of file elgamal.cpp.
Botan::ElGamal_PrivateKey::ElGamal_PrivateKey | ( | const DL_Group & | group, |
const BigInt & | private_key ) |
Load a private key from the integer encoding
group | the group to be used in the key |
private_key | the key's secret value |
Definition at line 63 of file elgamal.cpp.
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inlineoverridevirtualinherited |
Get the name of the underlying public key scheme.
Implements Botan::Asymmetric_Key.
Definition at line 51 of file elgamal.h.
Referenced by get_int_field(), and Botan::ElGamal_PublicKey::get_int_field().
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overridevirtualinherited |
Implements Botan::Public_Key.
Definition at line 34 of file elgamal.cpp.
References Botan::ANSI_X9_42, and Botan::Asymmetric_Key::object_identifier().
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overridevirtual |
Implements Botan::Public_Key.
Definition at line 89 of file elgamal.cpp.
References Botan::KeyPair::encryption_consistency_check().
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overridevirtual |
This is an internal library function exposed on key types. In all cases applications should use wrappers in pubkey.h
Return an decryption 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::Private_Key.
Definition at line 210 of file elgamal.cpp.
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overridevirtualinherited |
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.
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virtualinherited |
This is an internal library function exposed on key types. In all cases applications should use wrappers in pubkey.h
Return a KEM decryption 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::FrodoKEM_PrivateKey, Botan::Kyber_PrivateKey, Botan::McEliece_PrivateKey, Botan::RSA_PrivateKey, Botan::TLS::Hybrid_KEM_PrivateKey, and Botan::TLS::KEX_to_KEM_Adapter_PrivateKey.
Definition at line 117 of file pk_keys.cpp.
References Botan::Asymmetric_Key::algo_name(), and Botan::fmt().
Referenced by Botan::PK_KEM_Decryptor::PK_KEM_Decryptor().
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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
params | additional parameters |
provider | the provider to use |
Reimplemented in Botan::FrodoKEM_PublicKey, Botan::Kyber_PublicKey, Botan::McEliece_PublicKey, Botan::RSA_PublicKey, Botan::TLS::Hybrid_KEM_PublicKey, and Botan::TLS::KEX_to_KEM_Adapter_PublicKey.
Definition at line 96 of file pk_keys.cpp.
References Botan::Asymmetric_Key::algo_name(), and Botan::fmt().
Referenced by Botan::PK_KEM_Encryptor::PK_KEM_Encryptor().
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virtualinherited |
This is an internal library function exposed on key types. In all cases applications should use wrappers in pubkey.h
Return a key agreement 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::DH_PrivateKey, Botan::ECDH_PrivateKey, Botan::X25519_PrivateKey, and Botan::X448_PrivateKey.
Definition at line 129 of file pk_keys.cpp.
References Botan::Asymmetric_Key::algo_name(), and Botan::fmt().
Referenced by Botan::PK_Key_Agreement::PK_Key_Agreement().
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virtualinherited |
This is an internal library function exposed on key types. In all cases applications should use wrappers in pubkey.h
Return a signature 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::Dilithium_PrivateKey, Botan::DSA_PrivateKey, Botan::ECDSA_PrivateKey, Botan::ECGDSA_PrivateKey, Botan::ECKCDSA_PrivateKey, Botan::Ed25519_PrivateKey, Botan::Ed448_PrivateKey, Botan::GOST_3410_PrivateKey, Botan::HSS_LMS_PrivateKey, Botan::RSA_PrivateKey, Botan::SM2_PrivateKey, Botan::SphincsPlus_PrivateKey, Botan::TPM_PrivateKey, and Botan::XMSS_PrivateKey.
Definition at line 123 of file pk_keys.cpp.
References Botan::Asymmetric_Key::algo_name(), and Botan::fmt().
Referenced by Botan::PK_Signer::PK_Signer().
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virtualinherited |
This is an internal library function exposed on key types. In 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::Dilithium_PublicKey, Botan::DSA_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, Botan::Ed25519_PublicKey, Botan::Ed448_PublicKey, Botan::GOST_3410_PublicKey, Botan::HSS_LMS_PublicKey, Botan::RSA_PublicKey, Botan::SM2_PublicKey, Botan::SphincsPlus_PublicKey, and Botan::XMSS_PublicKey.
Definition at line 101 of file pk_keys.cpp.
References Botan::Asymmetric_Key::algo_name(), and Botan::fmt().
Referenced by Botan::PK_Verifier::PK_Verifier().
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virtualinherited |
This is an internal library function exposed on key types. In all cases applications should use wrappers in pubkey.h
Return a verification operation for this combination of key and signature algorithm or throw.
signature_algorithm | is the X.509 algorithm identifier encoding the padding scheme and hash hash function used in the signature if applicable. |
provider | the provider to use |
Reimplemented in Botan::Dilithium_PublicKey, Botan::DSA_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, Botan::Ed25519_PublicKey, Botan::Ed448_PublicKey, Botan::GOST_3410_PublicKey, Botan::HSS_LMS_PublicKey, Botan::RSA_PublicKey, Botan::SphincsPlus_PublicKey, and Botan::XMSS_PublicKey.
Definition at line 106 of file pk_keys.cpp.
References Botan::Asymmetric_Key::algo_name(), and Botan::fmt().
Referenced by Botan::PK_Verifier::PK_Verifier().
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inlinevirtualinherited |
Reimplemented in Botan::GOST_3410_PublicKey.
Definition at line 201 of file pk_keys.h.
Referenced by Botan::X509_Object::choose_sig_format(), and Botan::PK_Verifier::PK_Verifier().
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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::Asymmetric_Key.
Definition at line 26 of file elgamal.cpp.
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inherited |
Definition at line 86 of file pk_keys.cpp.
References Botan::create_hex_fingerprint(), and Botan::Private_Key::private_key_bits().
Referenced by Botan::Certificate_Store_In_SQL::find_certs_for_key(), Botan::Certificate_Store_In_SQL::insert_key(), and Botan::Certificate_Store_In_SQL::remove_key().
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inherited |
Definition at line 79 of file pk_keys.cpp.
References Botan::create_hex_fingerprint(), and Botan::Public_Key::subject_public_key().
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finalvirtualinherited |
Generate another (cryptographically independent) key pair using the same algorithm parameters as this key. This is most useful for algorithms that support PublicKeyOperation::KeyAgreement to generate a fitting ephemeral key pair. For other key types it might throw Not_Implemented.
Implements Botan::Asymmetric_Key.
Definition at line 50 of file elgamal.cpp.
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overridevirtual |
Access an algorithm specific field
If the field is not known for this algorithm, an Invalid_Argument is thrown. The interpretation of the result requires knowledge of which algorithm is involved. For instance for RSA "p" represents one of the secret primes, while for DSA "p" is the public prime.
Some algorithms may not implement this method at all.
This is primarily used to implement the FFI botan_pubkey_get_field and botan_privkey_get_field functions.
Reimplemented from Botan::Asymmetric_Key.
Definition at line 77 of file elgamal.cpp.
References Botan::ElGamal_PublicKey::algo_name().
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inlineinherited |
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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 30 of file elgamal.cpp.
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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 199 of file pk_keys.h.
Referenced by Botan::PK_Signer::PK_Signer(), Botan::PK_Verifier::PK_Verifier(), and Botan::PK_Verifier::PK_Verifier().
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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 188 of file pk_keys.h.
Referenced by Botan::PK_Signer::PK_Signer(), Botan::PK_Verifier::PK_Verifier(), and Botan::PK_Verifier::PK_Verifier().
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virtualinherited |
Get the OID of the underlying public key scheme.
Reimplemented in Botan::Dilithium_PublicKey, Botan::FrodoKEM_PublicKey, Botan::HSS_LMS_PublicKey, Botan::Kyber_PublicKey, and Botan::SphincsPlus_PublicKey.
Definition at line 22 of file pk_keys.cpp.
References Botan::Asymmetric_Key::algo_name(), Botan::fmt(), and Botan::OID::from_string().
Referenced by Botan::DH_PublicKey::algorithm_identifier(), Botan::DSA_PublicKey::algorithm_identifier(), Botan::EC_PublicKey::algorithm_identifier(), Botan::Ed25519_PublicKey::algorithm_identifier(), Botan::Ed448_PublicKey::algorithm_identifier(), Botan::ElGamal_PublicKey::algorithm_identifier(), Botan::GOST_3410_PublicKey::algorithm_identifier(), Botan::McEliece_PublicKey::algorithm_identifier(), Botan::RSA_PublicKey::algorithm_identifier(), Botan::TPM_PrivateKey::algorithm_identifier(), Botan::X25519_PublicKey::algorithm_identifier(), and Botan::X448_PublicKey::algorithm_identifier().
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inlinevirtualinherited |
Reimplemented in Botan::GOST_3410_PrivateKey, and Botan::HSS_LMS_PrivateKey.
Definition at line 296 of file pk_keys.h.
Referenced by Botan::Private_Key::private_key_info().
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overridevirtual |
Implements Botan::Private_Key.
Definition at line 81 of file elgamal.cpp.
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inherited |
Definition at line 60 of file pk_keys.cpp.
References Botan::DER_Encoder::encode(), Botan::DER_Encoder::end_cons(), Botan::DER_Encoder::get_contents(), Botan::OctetString, Botan::Private_Key::pkcs8_algorithm_identifier(), Botan::Private_Key::private_key_bits(), and Botan::DER_Encoder::start_sequence().
Referenced by Botan::PKCS8::BER_encode(), Botan::PKCS8::BER_encode_encrypted_pbkdf_iter(), Botan::PKCS8::BER_encode_encrypted_pbkdf_msec(), and Botan::PKCS8::PEM_encode().
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overridevirtual |
Allocate a new object for the public key associated with this private key.
Implements Botan::Private_Key.
Definition at line 73 of file elgamal.cpp.
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overridevirtualinherited |
Implements Botan::Public_Key.
Definition at line 42 of file elgamal.cpp.
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overridevirtual |
Note: some algorithms (for example RSA) do not have an obvious encoding for this value due to having many different values, and thus not implement this function. The default implementation throws Not_Implemented
Reimplemented from Botan::Private_Key.
Definition at line 85 of file elgamal.cpp.
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overridevirtualinherited |
For key agreements this is an alias for PK_Key_Agreement_Key::public_value.
Note: some algorithms (for example RSA) do not have an obvious encoding for this value due to having many different values, and thus throw Not_Implemented when invoking this method.
Implements Botan::Public_Key.
Definition at line 38 of file elgamal.cpp.
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inlinevirtualinherited |
Retrieves the number of remaining operations if this is a stateful private key.
Reimplemented in Botan::HSS_LMS_PrivateKey, and Botan::XMSS_PrivateKey.
Definition at line 309 of file pk_keys.h.
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inlinevirtualinherited |
Indicates if this key is stateful, ie that performing a private key operation requires updating the key storage.
Reimplemented in Botan::HSS_LMS_PrivateKey, and Botan::XMSS_PrivateKey.
Definition at line 302 of file pk_keys.h.
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inherited |
Definition at line 48 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().
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inlineoverridevirtualinherited |
Return true if this key could be used for the specified type of operation.
Implements Botan::Asymmetric_Key.
Definition at line 26 of file elgamal.h.