TF_DecryptorBase Class Reference

#include <pubkey.h>

Inheritance diagram for TF_DecryptorBase:

List of all members.

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Detailed Description

Definition at line 154 of file pubkey.h.

Public Member Functions
DecodingResult	FixedLengthDecrypt (RandomNumberGenerator &rng, const byte *cipherText, byte *plainText) const
	decrypt a byte string, and return the length of plaintext
unsigned int	FixedMaxPlaintextLength () const
unsigned int	FixedCiphertextLength () const
DecodingResult	Decrypt (RandomNumberGenerator &rng, const byte *cipherText, unsigned int cipherTextLength, byte *plainText) const
	decrypt a byte string, and return the length of plaintext
virtual BufferedTransformation *	CreateDecryptionFilter (RandomNumberGenerator &rng, BufferedTransformation *attachment=NULL) const
	create a new decryption filter
virtual unsigned int	MaxPlaintextLength (unsigned int cipherTextLength) const =0
	maximum length of plaintext for a given ciphertext length
unsigned int	MaxPlaintextLength (unsigned int cipherTextLength) const
	maximum length of plaintext for a given ciphertext length
virtual unsigned int	CiphertextLength (unsigned int plainTextLength) const =0
	calculate length of ciphertext given length of plaintext
unsigned int	CiphertextLength (unsigned int plainTextLength) const
	calculate length of ciphertext given length of plaintext
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

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Member Function Documentation

DecodingResult TF_DecryptorBase::FixedLengthDecrypt (  RandomNumberGenerator &  rng, const byte *  cipherText, byte *  plainText )  const [virtual]

decrypt a byte string, and return the length of plaintext Precondition: length of cipherText == CipherTextLength() size of plainText == MaxPlainTextLength() Returns: the actual length of the plaintext, or 0 if decryption fails. Implements PK_FixedLengthDecryptor. Definition at line 102 of file pubkey.cpp. References FixedLengthDecrypt(), SecBlock< T, A >::size(), and Integer::Zero(). Referenced by FixedLengthDecrypt().

DecodingResult PK_FixedLengthDecryptor::Decrypt (  RandomNumberGenerator &  rng, const byte *  cipherText, unsigned int  cipherTextLength, byte *  plainText )  const [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, or 0 if decryption fails. Implements PK_Decryptor. Definition at line 609 of file cryptlib.cpp. References PK_FixedLengthDecryptor::Decrypt(), and PK_FixedLengthDecryptor::FixedLengthDecrypt(). Referenced by PK_FixedLengthDecryptor::Decrypt().

BufferedTransformation * PK_Decryptor::CreateDecryptionFilter (  RandomNumberGenerator &  rng, BufferedTransformation *  attachment = NULL )  const [virtual, inherited]

create a new decryption filter Note: caller is responsible for deleting the returned pointer Definition at line 548 of file cryptlib.cpp. References PK_Decryptor::CreateDecryptionFilter(). Referenced by PK_Decryptor::CreateDecryptionFilter().

virtual unsigned int PK_CryptoSystem::MaxPlaintextLength (  unsigned int  cipherTextLength  )  const [pure virtual, inherited]

maximum length of plaintext for a given ciphertext length Note: This function returns 0 if cipherTextLength is not valid (too long or too short). Implemented in PK_FixedLengthCryptoSystem.

unsigned int PK_FixedLengthCryptoSystem::MaxPlaintextLength (  unsigned int  cipherTextLength  )  const [virtual, inherited]

maximum length of plaintext for a given ciphertext length Note: This function returns 0 if cipherTextLength is not valid (too long or too short). Implements PK_CryptoSystem. Definition at line 593 of file cryptlib.cpp. References PK_FixedLengthCryptoSystem::MaxPlaintextLength(). Referenced by PK_FixedLengthCryptoSystem::MaxPlaintextLength().

virtual unsigned int PK_CryptoSystem::CiphertextLength (  unsigned int  plainTextLength  )  const [pure virtual, inherited]

calculate length of ciphertext given length of plaintext Note: This function returns 0 if plainTextLength is not valid (too long). Implemented in PK_FixedLengthCryptoSystem.

unsigned int PK_FixedLengthCryptoSystem::CiphertextLength (  unsigned int  plainTextLength  )  const [virtual, inherited]

calculate length of ciphertext given length of plaintext Note: This function returns 0 if plainTextLength is not valid (too long). Implements PK_CryptoSystem. Definition at line 601 of file cryptlib.cpp. References PK_FixedLengthCryptoSystem::CiphertextLength(). Referenced by PK_FixedLengthCryptoSystem::CiphertextLength().

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The documentation for this class was generated from the following files:

• pubkey.h
• pubkey.cpp

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