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DL_DecryptorImpl< SCHEME_OPTIONS > Class Template Reference

#include <pubkey.h>

Inheritance diagram for DL_DecryptorImpl< SCHEME_OPTIONS >:

DL_PrivateObjectImpl< DL_DecryptorBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS > DL_ObjectImpl< DL_DecryptorBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS, SCHEME_OPTIONS::PrivateKey > PrivateKeyCopier< SCHEME_OPTIONS > DL_ObjectImplBase< DL_DecryptorBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS, SCHEME_OPTIONS::PrivateKey > AlgorithmImpl< DL_DecryptorBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS::AlgorithmInfo > DL_DecryptorBase< SCHEME_OPTIONS::Element > DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< SCHEME_OPTIONS::Element > > PK_Decryptor DL_Base< DL_PrivateKey< SCHEME_OPTIONS::Element > > PK_CryptoSystem PrivateKeyAlgorithm AsymmetricAlgorithm Algorithm Clonable List of all members.

Detailed Description

template<class SCHEME_OPTIONS>
class DL_DecryptorImpl< SCHEME_OPTIONS >

_

Definition at line 1392 of file pubkey.h.

Public Types

typedef SCHEME_OPTIONS::PrivateKey::Element Element
typedef SCHEME_OPTIONS SchemeOptions
typedef SCHEME_OPTIONS::PrivateKey KeyClass

Public Member Functions

void CopyKeyInto (typename SCHEME_OPTIONS::PublicKey &key) const
void CopyKeyInto (typename SCHEME_OPTIONS::PrivateKey &key) const
PrivateKeyAccessPrivateKey ()
PublicKeyAccessPublicKey ()
const SCHEME_OPTIONS::PrivateKey & GetKey () const
SCHEME_OPTIONS::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 BufferedTransformationCreateDecryptionFilter (RandomNumberGenerator &rng, BufferedTransformation *attachment=NULL, const NameValuePairs &parameters=g_nullNameValuePairs) const
 create a new decryption filter
DecodingResult FixedLengthDecrypt (RandomNumberGenerator &rng, const byte *ciphertext, byte *plaintext, const NameValuePairs &parameters=g_nullNameValuePairs) const
 decrypt a fixed size ciphertext
virtual unsigned int FixedCiphertextLength () const
 return fixed ciphertext length, if one exists, otherwise return 0
virtual unsigned int FixedMaxPlaintextLength () const
 return maximum plaintext length given the fixed ciphertext length, if one exists, otherwise return 0
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

Static Public Member Functions

static std::string StaticAlgorithmName ()

Protected Types

typedef DL_PrivateKey< SCHEME_OPTIONS::Element > KeyInterface

Protected Member Functions

const DL_ElgamalLikeSignatureAlgorithm<
Element > & 
GetSignatureAlgorithm () const
const DL_KeyAgreementAlgorithm<
Element > & 
GetKeyAgreementAlgorithm () const
const DL_KeyDerivationAlgorithm<
Element > & 
GetKeyDerivationAlgorithm () const
const DL_SymmetricEncryptionAlgorithmGetSymmetricEncryptionAlgorithm () const
HashIdentifier GetHashIdentifier () const
const PK_SignatureMessageEncodingMethodGetMessageEncodingInterface () const
DL_DecryptorBase< SCHEME_OPTIONS::Element
>::KeyInterface
AccessKeyInterface ()
const DL_DecryptorBase< SCHEME_OPTIONS::Element
>::KeyInterface
GetKeyInterface () const
unsigned int GetDigestSize () const
const DL_GroupParameters<
Element > & 
GetAbstractGroupParameters () const
DL_GroupParameters< Element > & AccessAbstractGroupParameters ()


Member Function Documentation

DecodingResult DL_DecryptorBase< SCHEME_OPTIONS::Element >::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.

unsigned int DL_CryptoSystemBase< PK_Decryptor , DL_PrivateKey< SCHEME_OPTIONS::Element > >::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< SCHEME_OPTIONS::Element > >::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< SCHEME_OPTIONS::Element > >::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.

virtual unsigned int PK_CryptoSystem::FixedCiphertextLength  )  const [inline, virtual, inherited]
 

return fixed ciphertext length, if one exists, otherwise return 0

Note:
"Fixed" here means length of ciphertext does not depend on length of plaintext. It usually does depend on the key length.

Reimplemented in ElGamalObjectImpl< DL_DecryptorBase< Integer >, SchemeOptions, SchemeOptions::PrivateKey >, ElGamalObjectImpl< DL_EncryptorBase< Integer >, SchemeOptions, SchemeOptions::PublicKey >, TF_CryptoSystemBase< PK_Decryptor, TF_Base< TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod > >, and TF_CryptoSystemBase< PK_Encryptor, TF_Base< RandomizedTrapdoorFunction, PK_EncryptionMessageEncodingMethod > >.

Definition at line 1134 of file cryptlib.h.

Referenced by PK_Decryptor::FixedLengthDecrypt().


The documentation for this class was generated from the following file:
Generated on Sun Jul 3 00:20:38 2005 for Crypto++ by  doxygen 1.4.3-20050530