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TF_DecryptorBase Class Reference

#include <pubkey.h>

Inheritance diagram for TF_DecryptorBase:

TF_CryptoSystemBase< PK_Decryptor, TF_Base< TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod > > PK_FixedLengthCryptoSystemImpl< PK_Decryptor > TF_Base< TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod > PK_Decryptor PK_CryptoSystem PrivateKeyAlgorithm AsymmetricAlgorithm Algorithm Clonable List of all members.

Detailed Description

_

Definition at line 166 of file pubkey.h.

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
bool ParameterSupported (const char *name) const
 this object supports the use of the parameter with the given name
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
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
virtual BufferedTransformation * CreateDecryptionFilter (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
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 PrivateKey & AccessPrivateKey ()=0
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 std::string AlgorithmName () const
 returns name of this algorithm, not universally implemented yet
virtual Clonable * Clone () const
 this is not implemented by most classes yet

Protected Types

typedef TrapdoorFunctionInverse TrapdoorFunctionInterface
typedef PK_EncryptionMessageEncodingMethod MessageEncodingInterface

Protected Member Functions

unsigned int PaddedBlockByteLength () const
unsigned int PaddedBlockBitLength () const
virtual const TrapdoorFunctionBounds & GetTrapdoorFunctionBounds () const=0
virtual const TrapdoorFunctionInterface & GetTrapdoorFunctionInterface () const=0
virtual const MessageEncodingInterface & GetMessageEncodingInterface () const=0

Member Function Documentation

DecodingResult TF_DecryptorBase::Decrypt (  RandomNumberGenerator &  rng,
const byte *  ciphertext,
unsigned int  ciphertextLength,
byte *  plaintext,
const NameValuePairs &  parameters = g_nullNameValuePairs
)  const [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 106 of file pubkey.cpp.

References PK_CryptoSystem::FixedCiphertextLength(), SecBlock< T, A >::size(), and Integer::Zero().

bool TF_CryptoSystemBase< PK_Decryptor , TF_Base< TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod > >::ParameterSupported (  const char *  name  )  const [inline, virtual, inherited]
 

Implements PK_CryptoSystem.

Definition at line 156 of file pubkey.h.

unsigned int TF_CryptoSystemBase< PK_Decryptor , TF_Base< TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod > >::FixedCiphertextLength (   )  const [inline, virtual, inherited]
 

Implements PK_FixedLengthCryptoSystemImpl< PK_Decryptor >.

Definition at line 158 of file pubkey.h.

unsigned int PK_FixedLengthCryptoSystemImpl< PK_Decryptor >::MaxPlaintextLength (  unsigned int  ciphertextLength  )  const [inline, virtual, inherited]
 

Implements PK_CryptoSystem.

Definition at line 142 of file pubkey.h.

unsigned int PK_FixedLengthCryptoSystemImpl< PK_Decryptor >::CiphertextLength (  unsigned int  plaintextLength  )  const [inline, virtual, inherited]
 

Implements PK_CryptoSystem.

Definition at line 144 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 files:
Generated on Sat Aug 28 17:25:05 2004 for Crypto++ by doxygen 1.3.8