DL_EncryptorBase< T > Class Template Reference

#include <pubkey.h>

Inheritance diagram for DL_EncryptorBase< T >:

DL_CryptoSystemBase< PK_Encryptor, DL_PublicKey< T > > PK_Encryptor DL_Base< DL_PublicKey< T > > PK_CryptoSystem PublicKeyAlgorithm AsymmetricAlgorithm Algorithm Clonable List of all members.

Detailed Description

template<class T>
class DL_EncryptorBase< T >

_

Definition at line 1199 of file pubkey.h.

Public Types

typedef T Element

Public Member Functions

void Encrypt (RandomNumberGenerator &rng, const byte *plaintext, size_t plaintextLength, byte *ciphertext, const NameValuePairs &parameters=g_nullNameValuePairs) const
 encrypt a byte string
size_t MaxPlaintextLength (size_t ciphertextLength) const
 maximum length of plaintext for a given ciphertext length
size_t CiphertextLength (size_t 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 BufferedTransformationCreateEncryptionFilter (RandomNumberGenerator &rng, BufferedTransformation *attachment=NULL, const NameValuePairs &parameters=g_nullNameValuePairs) const
 create a new encryption filter
virtual size_t FixedCiphertextLength () const
 return fixed ciphertext length, if one exists, otherwise return 0
virtual size_t 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 PublicKeyAccessPublicKey ()=0
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 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_PublicKey< 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 KeyInterfaceAccessKeyInterface ()=0
virtual const KeyInterfaceGetKeyInterface () const=0


Member Function Documentation

template<class T>
void DL_EncryptorBase< T >::Encrypt ( RandomNumberGenerator rng,
const byte *  plaintext,
size_t  plaintextLength,
byte *  ciphertext,
const NameValuePairs parameters = g_nullNameValuePairs 
) const [inline, virtual]

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 1204 of file pubkey.h.

size_t DL_CryptoSystemBase< PK_Encryptor , DL_PublicKey< T > >::MaxPlaintextLength ( size_t  ciphertextLength  )  const [inline, virtual, inherited]

Implements PK_CryptoSystem.

Definition at line 1140 of file pubkey.h.

References DL_Base< KI >::GetAbstractGroupParameters().

size_t DL_CryptoSystemBase< PK_Encryptor , DL_PublicKey< T > >::CiphertextLength ( size_t  plaintextLength  )  const [inline, virtual, inherited]

Implements PK_CryptoSystem.

Definition at line 1146 of file pubkey.h.

References DL_Base< KI >::GetAbstractGroupParameters().

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

Implements PK_CryptoSystem.

Definition at line 1152 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 570 of file cryptlib.cpp.

virtual size_t 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 TF_CryptoSystemBase< PK_Decryptor, TF_Base< TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod > >, and TF_CryptoSystemBase< PK_Encryptor, TF_Base< RandomizedTrapdoorFunction, PK_EncryptionMessageEncodingMethod > >.

Definition at line 1147 of file cryptlib.h.

Referenced by PK_Decryptor::FixedLengthDecrypt().


The documentation for this class was generated from the following file:
Generated on Sat Dec 23 02:07:19 2006 for Crypto++ by  doxygen 1.5.1-p1