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 TwoBases< TF_DecryptorBase, PrivateKeyCopier< SCHEME_OPTIONS::Keys > > AlgorithmImpl< TwoBases< TF_DecryptorBase, PrivateKeyCopier< SCHEME_OPTIONS::Keys > >, SCHEME_OPTIONS::AlgorithmInfo > TF_ObjectImplBase< TwoBases< TF_DecryptorBase, PrivateKeyCopier< SCHEME_OPTIONS::Keys > >, SCHEME_OPTIONS, PrivateKeyCopier< SCHEME_OPTIONS::Keys >::KeyClass > TF_ObjectImpl< TF_DecryptorBase, SCHEME_OPTIONS, PrivateKeyCopier< SCHEME_OPTIONS::Keys > > TF_DecryptorImpl< SCHEME_OPTIONS > 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 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
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 TrapdoorFunctionInverse TrapdoorFunctionInterface
typedef PK_EncryptionMessageEncodingMethod MessageEncodingInterface

Protected Member Functions

unsigned int PaddedBlockByteLength () const
unsigned int PaddedBlockBitLength () const
virtual const TrapdoorFunctionBoundsGetTrapdoorFunctionBounds () const =0
virtual const TrapdoorFunctionInterfaceGetTrapdoorFunctionInterface () const =0
virtual const MessageEncodingInterfaceGetMessageEncodingInterface () 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 Integer::ByteCount(), Integer::Encode(), TF_CryptoSystemBase< PK_Decryptor, TF_Base< TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod > >::FixedCiphertextLength(), TF_CryptoSystemBase< PK_Decryptor, TF_Base< TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod > >::PaddedBlockBitLength(), TF_CryptoSystemBase< PK_Decryptor, TF_Base< TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod > >::PaddedBlockByteLength(), 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.

Referenced by Decrypt().

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 Fri Dec 16 03:04:34 2005 for Crypto++ by  doxygen 1.4.5