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ElGamal::EncryptorImpl Class Reference

Inheritance diagram for ElGamal::EncryptorImpl:

ElGamalObjectImpl< DL_EncryptorBase< Integer >, SchemeOptions, SchemeOptions::PublicKey > PublicKeyCopier< SchemeOptions > DL_ObjectImplBase< DL_EncryptorBase< Integer >, SchemeOptions, SchemeOptions::PublicKey > ElGamalBase AlgorithmImpl< DL_EncryptorBase< Integer >, SchemeOptions::AlgorithmInfo > DL_KeyAgreementAlgorithm_DH< Integer, NoCofactorMultiplication > DL_KeyDerivationAlgorithm< Integer > DL_SymmetricEncryptionAlgorithm DL_EncryptorBase< Integer > DL_KeyAgreementAlgorithm< Integer > DL_CryptoSystemBase< PK_Encryptor, DL_PublicKey< Integer > > PK_Encryptor DL_Base< DL_PublicKey< Integer > > PK_CryptoSystem PublicKeyAlgorithm AsymmetricAlgorithm Algorithm Clonable List of all members.

Detailed Description

Definition at line 109 of file elgamal.h.

Public Types

typedef SchemeOptions SchemeOptions
typedef SchemeOptions::PublicKey::Element Element
typedef Integer Element
typedef SchemeOptions::PublicKey KeyClass

Public Member Functions

void CopyKeyInto (SchemeOptions::PublicKey &key) const
unsigned int FixedMaxPlaintextLength () const
 return maximum plaintext length given the fixed ciphertext length, if one exists, otherwise return 0
unsigned int FixedCiphertextLength () const
 return fixed ciphertext length, if one exists, otherwise return 0
const DL_GroupParameters_GFPGetGroupParameters () const
DecodingResult FixedLengthDecrypt (RandomNumberGenerator &rng, const byte *cipherText, byte *plainText) const
PrivateKeyAccessPrivateKey ()
PublicKeyAccessPublicKey ()
const SchemeOptions::PublicKeyGetKey () const
SchemeOptions::PublicKeyAccessKey ()
std::string AlgorithmName () const
 returns name of this algorithm, not universally implemented yet
void Encrypt (RandomNumberGenerator &rng, const byte *plaintext, unsigned int plaintextLength, byte *ciphertext, const NameValuePairs &parameters=g_nullNameValuePairs) const
 encrypt a byte string
unsigned int MaxPlaintextLength (unsigned int ciphertextLength) const
 maximum length of plaintext for a given ciphertext length
unsigned int CiphertextLength (unsigned int plaintextLength) const
 calculate length of ciphertext given length of plaintext
bool ParameterSupported (const char *name) const
 this object supports the use of the parameter with the given name
virtual bool ParameterSupported (const char *name) const
virtual bool ParameterSupported (const char *name) const
virtual BufferedTransformationCreateEncryptionFilter (RandomNumberGenerator &rng, BufferedTransformation *attachment=NULL, const NameValuePairs &parameters=g_nullNameValuePairs) const
 create a new encryption filter
CryptoMaterialAccessMaterial ()
 returns a reference to the crypto material used by this object
const CryptoMaterialGetMaterial () const
 returns a const reference to the crypto material used by this object
virtual const PublicKeyGetPublicKey () const
void BERDecode (BufferedTransformation &bt)
 for backwards compatibility, calls AccessMaterial().Load(bt)
void DEREncode (BufferedTransformation &bt) const
 for backwards compatibility, calls GetMaterial().Save(bt)
virtual ClonableClone () const
 this is not implemented by most classes yet
void Derive (const DL_GroupParameters< Integer > &groupParams, byte *derivedKey, unsigned int derivedLength, const Integer &agreedElement, const Integer &ephemeralPublicKey, const NameValuePairs &derivationParams) const
unsigned int GetSymmetricKeyLength (unsigned int plainTextLength) const
unsigned int GetSymmetricCiphertextLength (unsigned int plainTextLength) const
unsigned int GetMaxSymmetricPlaintextLength (unsigned int cipherTextLength) const
void SymmetricEncrypt (RandomNumberGenerator &rng, const byte *key, const byte *plainText, unsigned int plainTextLength, byte *cipherText, const NameValuePairs &parameters) const
DecodingResult SymmetricDecrypt (const byte *key, const byte *cipherText, unsigned int cipherTextLength, byte *plainText, const NameValuePairs &parameters) const
Element AgreeWithEphemeralPrivateKey (const DL_GroupParameters< Element > &params, const DL_FixedBasePrecomputation< Element > &publicPrecomputation, const Integer &privateExponent) const
Element AgreeWithStaticPrivateKey (const DL_GroupParameters< Element > &params, const Element &publicElement, bool validateOtherPublicKey, const Integer &privateExponent) const

Static Public Member Functions

static std::string StaticAlgorithmName ()
static const char * StaticAlgorithmName ()

Protected Types

typedef DL_PublicKey< IntegerKeyInterface

Protected Member Functions

const DL_KeyAgreementAlgorithm<
Integer > & 
GetKeyAgreementAlgorithm () const
const DL_KeyDerivationAlgorithm<
Integer > & 
GetKeyDerivationAlgorithm () const
const DL_SymmetricEncryptionAlgorithmGetSymmetricEncryptionAlgorithm () const
DL_EncryptorBase< Integer
>::KeyInterface
AccessKeyInterface ()
const DL_EncryptorBase< Integer
>::KeyInterface
GetKeyInterface () const
HashIdentifier GetHashIdentifier () const
unsigned int GetDigestSize () const
const DL_GroupParameters<
Element > & 
GetAbstractGroupParameters () const
DL_GroupParameters< Element > & AccessAbstractGroupParameters ()


Member Function Documentation

unsigned int ElGamalObjectImpl< DL_EncryptorBase< Integer > , SchemeOptions , SchemeOptions::PublicKey >::FixedCiphertextLength  )  const [inline, virtual, inherited]
 

Reimplemented from PK_CryptoSystem.

Definition at line 82 of file elgamal.h.

void DL_EncryptorBase< Integer >::Encrypt RandomNumberGenerator rng,
const byte *  plaintext,
unsigned int  plaintextLength,
byte *  ciphertext,
const NameValuePairs parameters = g_nullNameValuePairs
const [inline, virtual, inherited]
 

encrypt a byte string

Precondition:
CiphertextLength(plaintextLength) != 0 (i.e., plaintext isn't too long)

size of ciphertext == CiphertextLength(plaintextLength)

Implements PK_Encryptor.

Definition at line 1224 of file pubkey.h.

References DL_KeyAgreementAlgorithm< T >::AgreeWithEphemeralPrivateKey(), DL_KeyDerivationAlgorithm< T >::Derive(), DL_GroupParameters< T >::EncodeElement(), DL_GroupParameters< T >::ExponentiateBase(), DL_Base< KI >::GetAbstractGroupParameters(), DL_GroupParameters< T >::GetEncodedElementSize(), DL_GroupParameters< T >::GetMaxExponent(), DL_PublicKey< T >::GetPublicPrecomputation(), DL_SymmetricEncryptionAlgorithm::GetSymmetricKeyLength(), Integer::One(), SecBlock< T, A >::size(), and DL_SymmetricEncryptionAlgorithm::SymmetricEncrypt().

unsigned int DL_CryptoSystemBase< PK_Encryptor , DL_PublicKey< Integer > >::MaxPlaintextLength unsigned int  ciphertextLength  )  const [inline, virtual, inherited]
 

Implements PK_CryptoSystem.

Definition at line 1160 of file pubkey.h.

unsigned int DL_CryptoSystemBase< PK_Encryptor , DL_PublicKey< Integer > >::CiphertextLength unsigned int  plaintextLength  )  const [inline, virtual, inherited]
 

Implements PK_CryptoSystem.

Definition at line 1166 of file pubkey.h.

bool DL_CryptoSystemBase< PK_Encryptor , DL_PublicKey< Integer > >::ParameterSupported const char *  name  )  const [inline, virtual, inherited]
 

Implements PK_CryptoSystem.

Definition at line 1172 of file pubkey.h.

BufferedTransformation * PK_Encryptor::CreateEncryptionFilter RandomNumberGenerator rng,
BufferedTransformation attachment = NULL,
const NameValuePairs parameters = g_nullNameValuePairs
const [virtual, inherited]
 

create a new encryption filter

Note:
The caller is responsible for deleting the returned pointer.

Encoding parameters should be passed in the "EP" channel.

Definition at line 564 of file cryptlib.cpp.


The documentation for this class was generated from the following file:
Generated on Sun Jul 3 00:20:44 2005 for Crypto++ by  doxygen 1.4.3-20050530