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ElGamal::DecryptorImpl Class Reference

Inheritance diagram for ElGamal::DecryptorImpl:

ElGamalObjectImpl< DL_DecryptorBase< Integer >, SchemeOptions, SchemeOptions::PrivateKey > PrivateKeyCopier< SchemeOptions > DL_ObjectImplBase< DL_DecryptorBase< Integer >, SchemeOptions, SchemeOptions::PrivateKey > ElGamalBase AlgorithmImpl< DL_DecryptorBase< Integer >, SchemeOptions::AlgorithmInfo > DL_KeyAgreementAlgorithm_DH< Integer, NoCofactorMultiplication > DL_KeyDerivationAlgorithm< Integer > DL_SymmetricEncryptionAlgorithm DL_DecryptorBase< Integer > DL_KeyAgreementAlgorithm< Integer > DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< Integer > > PK_Decryptor DL_Base< DL_PrivateKey< Integer > > PK_CryptoSystem PrivateKeyAlgorithm AsymmetricAlgorithm Algorithm Clonable List of all members.

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_GFPGetGroupParameters () 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
PrivateKeyAccessPrivateKey ()
PublicKeyAccessPublicKey ()
const SchemeOptions::PrivateKeyGetKey () const
SchemeOptions::PrivateKeyAccessKey ()
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 BufferedTransformationCreateDecryptionFilter (RandomNumberGenerator &rng, BufferedTransformation *attachment=NULL, const NameValuePairs &parameters=g_nullNameValuePairs) const
 create a new decryption 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 PrivateKeyGetPrivateKey () 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_PrivateKey< IntegerKeyInterface

Protected Member Functions

const DL_KeyAgreementAlgorithm<
Integer > & 
GetKeyAgreementAlgorithm () const
const DL_KeyDerivationAlgorithm<
Integer > & 
GetKeyDerivationAlgorithm () const
const DL_SymmetricEncryptionAlgorithmGetSymmetricEncryptionAlgorithm () 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 ()


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(), SecBlock< T, A >::size(), 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.


The documentation for this class was generated from the following file:
Generated on Sun Jul 3 00:20:43 2005 for Crypto++ by  doxygen 1.4.3-20050530