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DL_DecryptorBase< T > Class Template Reference

#include <pubkey.h>

Inheritance diagram for DL_DecryptorBase< T >:

DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< T > > PK_Decryptor DL_Base< DL_PrivateKey< T > > PK_CryptoSystem PrivateKeyAlgorithm AsymmetricAlgorithm Algorithm Clonable List of all members.

Detailed Description

template<class T>
class DL_DecryptorBase< T >

_

Definition at line 1183 of file pubkey.h.

Public Types

typedef T Element

Public Member Functions

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 PrivateKeyAccessPrivateKey ()=0
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 std::string AlgorithmName () const
 returns name of this algorithm, not universally implemented yet
virtual ClonableClone () const
 this is not implemented by most classes yet

Protected Types

typedef DL_PrivateKey< T > KeyInterface

Protected Member Functions

virtual const DL_KeyAgreementAlgorithm<
Element > & 
GetKeyAgreementAlgorithm () const=0
virtual const DL_KeyDerivationAlgorithm<
Element > & 
GetKeyDerivationAlgorithm () const=0
virtual const DL_SymmetricEncryptionAlgorithmGetSymmetricEncryptionAlgorithm () const=0
const DL_GroupParameters<
Element > & 
GetAbstractGroupParameters () const
DL_GroupParameters< Element > & AccessAbstractGroupParameters ()
virtual KeyInterface & AccessKeyInterface ()=0
virtual const KeyInterface & GetKeyInterface () const=0


Member Function Documentation

template<class T>
DecodingResult DL_DecryptorBase< T >::Decrypt RandomNumberGenerator rng,
const byte *  ciphertext,
unsigned int  ciphertextLength,
byte *  plaintext,
const NameValuePairs parameters = g_nullNameValuePairs
const [inline, virtual]
 

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_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< T > >::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< T > >::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< T > >::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.
Definition at line 1134 of file cryptlib.h.

Referenced by TF_DecryptorBase::Decrypt(), and TF_EncryptorBase::Encrypt().


The documentation for this class was generated from the following file:
Generated on Fri Aug 27 14:02:57 2004 for Crypto++ by doxygen 1.3.8