ElGamal::DecryptorImpl Class Reference

Inheritance diagram for ElGamal::DecryptorImpl:

List of all members.

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Detailed Description

Definition at line 116 of file elgamal.h.

Public Types
typedef SchemeOptions	SchemeOptions
typedef SchemeOptions::PrivateKey::Element	Element
typedef Integer	Element
typedef SchemeOptions::PrivateKey	KeyClass
Public Member Functions
void	CopyKeyInto (SchemeOptions::PublicKey &key) const
void	CopyKeyInto (SchemeOptions::PrivateKey &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_GFP &	GetGroupParameters () const
DecodingResult	FixedLengthDecrypt (RandomNumberGenerator &rng, const byte *cipherText, byte *plainText) const
DecodingResult	FixedLengthDecrypt (RandomNumberGenerator &rng, const byte *ciphertext, byte *plaintext, const NameValuePairs &parameters=g_nullNameValuePairs) const
	decrypt a fixed size ciphertext
PrivateKey &	AccessPrivateKey ()
PublicKey &	AccessPublicKey ()
const SchemeOptions::PrivateKey &	GetKey () const
SchemeOptions::PrivateKey &	AccessKey ()
std::string	AlgorithmName () const
	returns name of this algorithm, not universally implemented yet
DecodingResult	Decrypt (RandomNumberGenerator &rng, const byte *ciphertext, unsigned int ciphertextLength, byte *plaintext, const NameValuePairs &parameters=g_nullNameValuePairs) const
	decrypt a byte string, and return the length of plaintext
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 BufferedTransformation *	CreateDecryptionFilter (RandomNumberGenerator &rng, BufferedTransformation *attachment=NULL, const NameValuePairs &parameters=g_nullNameValuePairs) const
	create a new decryption filter
CryptoMaterial &	AccessMaterial ()
	returns a reference to the crypto material used by this object
const CryptoMaterial &	GetMaterial () const
	returns a const reference to the crypto material used by this object
virtual const PrivateKey &	GetPrivateKey () 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 Clonable *	Clone () 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_PrivateKey< Integer >	KeyInterface
Protected Member Functions
const DL_KeyAgreementAlgorithm< Integer > &	GetKeyAgreementAlgorithm () const
const DL_KeyDerivationAlgorithm< Integer > &	GetKeyDerivationAlgorithm () const
const DL_SymmetricEncryptionAlgorithm &	GetSymmetricEncryptionAlgorithm () const
DL_DecryptorBase< Integer >::KeyInterface &	AccessKeyInterface ()
const DL_DecryptorBase< Integer >::KeyInterface &	GetKeyInterface () const
HashIdentifier	GetHashIdentifier () const
unsigned int	GetDigestSize () const
const DL_GroupParameters< Element > &	GetAbstractGroupParameters () const
DL_GroupParameters< Element > &	AccessAbstractGroupParameters ()

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Member Function Documentation

unsigned int ElGamalObjectImpl< DL_DecryptorBase< Integer > , SchemeOptions , SchemeOptions::PrivateKey >::FixedCiphertextLength (   )  const [inline, virtual, inherited]

Reimplemented from PK_CryptoSystem. Definition at line 82 of file elgamal.h.

DecodingResult DL_DecryptorBase< Integer >::Decrypt (  RandomNumberGenerator &  rng, const byte *  ciphertext, unsigned int  ciphertextLength, byte *  plaintext, const NameValuePairs &  parameters = g_nullNameValuePairs )  const [inline, virtual, inherited]

decrypt a byte string, and return the length of plaintext Precondition: size of plaintext == MaxPlaintextLength(ciphertextLength) bytes. Returns: the actual length of the plaintext, indication that decryption failed. Implements PK_Decryptor. Definition at line 1188 of file pubkey.h. References DL_KeyAgreementAlgorithm< T >::AgreeWithStaticPrivateKey(), DL_GroupParameters< T >::DecodeElement(), DL_KeyDerivationAlgorithm< T >::Derive(), DL_Base< KI >::GetAbstractGroupParameters(), DL_GroupParameters< T >::GetEncodedElementSize(), DL_SymmetricEncryptionAlgorithm::GetMaxSymmetricPlaintextLength(), DL_PrivateKey< T >::GetPrivateExponent(), DL_SymmetricEncryptionAlgorithm::GetSymmetricKeyLength(), and DL_SymmetricEncryptionAlgorithm::SymmetricDecrypt().

unsigned int DL_CryptoSystemBase< PK_Decryptor , DL_PrivateKey< 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_Decryptor , DL_PrivateKey< Integer > >::CiphertextLength (  unsigned int  plaintextLength  )  const [inline, virtual, inherited]

Implements PK_CryptoSystem. Definition at line 1166 of file pubkey.h.

bool DL_CryptoSystemBase< PK_Decryptor , DL_PrivateKey< Integer > >::ParameterSupported (  const char *  name  )  const [inline, virtual, inherited]

Implements PK_CryptoSystem. Definition at line 1172 of file pubkey.h.

BufferedTransformation * PK_Decryptor::CreateDecryptionFilter (  RandomNumberGenerator &  rng, BufferedTransformation *  attachment = NULL, const NameValuePairs &  parameters = g_nullNameValuePairs )  const [virtual, inherited]

create a new decryption filter Note: caller is responsible for deleting the returned pointer Definition at line 610 of file cryptlib.cpp.

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The documentation for this class was generated from the following file:

• elgamal.h

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