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TF_DecryptorImpl< SCHEME_OPTIONS > Class Template Reference

#include <pubkey.h>

Inheritance diagram for TF_DecryptorImpl< SCHEME_OPTIONS >:

TF_PrivateObjectImpl< TF_DecryptorBase, SCHEME_OPTIONS > TF_ObjectImpl< TF_DecryptorBase, SCHEME_OPTIONS, SCHEME_OPTIONS::PrivateKey > PrivateKeyCopier< SCHEME_OPTIONS > TF_ObjectImplBase< TF_DecryptorBase, SCHEME_OPTIONS, SCHEME_OPTIONS::PrivateKey > TF_DecryptorBase TF_CryptoSystemBase< PK_FixedLengthDecryptor, TF_Base< TrapdoorFunctionInverse > > PK_FixedLengthDecryptor TF_Base< TrapdoorFunctionInverse > PK_Decryptor PK_FixedLengthCryptoSystem PK_CryptoSystem PrivateKeyAlgorithm PK_CryptoSystem AsymmetricAlgorithm Algorithm Clonable List of all members.

Detailed Description

template<class SCHEME_OPTIONS>
class TF_DecryptorImpl< SCHEME_OPTIONS >

Definition at line 336 of file pubkey.h.

Public Types

typedef SCHEME_OPTIONS SchemeOptions
typedef SCHEME_OPTIONS::PrivateKey KeyClass

Public Member Functions

void CopyKeyInto (typename SCHEME_OPTIONS::PrivateKey &key) const
void CopyKeyInto (typename SCHEME_OPTIONS::PublicKey &key) const
const SCHEME_OPTIONS::PrivateKey & GetKey () const
SCHEME_OPTIONS::PrivateKey & AccessKey ()
PublicKeyAccessPublicKey ()
const PublicKeyGetPublicKey () const
PrivateKeyAccessPrivateKey ()
const PrivateKeyGetPrivateKey () const
const KeyClass & GetTrapdoorFunction () const
std::string AlgorithmName () const
DecodingResult FixedLengthDecrypt (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 (const byte *cipherText, unsigned int cipherTextLength, byte *plainText) const
 decrypt a byte string, and return the length of plaintext

virtual BufferedTransformationCreateDecryptionFilter (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

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

void BERDecode (BufferedTransformation &bt)
 for backwards compatibility, calls AccessMaterial().Load(bt)

void DEREncode (BufferedTransformation &bt) const
 for backwards compatibility, calls GetMaterial().Save(bt)

virtual ClonableClone () const
 this is not implemented by most classes yet


Protected Types

typedef TrapdoorFunctionInverse TrapdoorFunctionInterface

Protected Member Functions

const PK_PaddingAlgorithmGetPaddingAlgorithm () const
const TrapdoorFunctionBoundsGetTrapdoorFunctionBounds () const
const TF_DecryptorBase::TrapdoorFunctionInterface & GetTrapdoorFunctionInterface () const
unsigned int PaddedBlockBitLength () const
unsigned int PaddedBlockByteLength () const


Member Function Documentation

DecodingResult TF_DecryptorBase::FixedLengthDecrypt const byte *  cipherText,
byte *  plainText
const [virtual, inherited]
 

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 41 of file pubkey.cpp.

References SecBlock< byte >::size(), and Integer::Zero().

DecodingResult PK_FixedLengthDecryptor::Decrypt 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 611 of file cryptlib.cpp.

References PK_FixedLengthDecryptor::FixedLengthDecrypt().

BufferedTransformation * PK_Decryptor::CreateDecryptionFilter BufferedTransformation attachment = NULL  )  const [virtual, inherited]
 

create a new decryption filter

Note:
caller is responsible for deleting the returned pointer

Definition at line 551 of file cryptlib.cpp.

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 595 of file cryptlib.cpp.

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 603 of file cryptlib.cpp.


The documentation for this class was generated from the following file:
Generated on Tue Jul 8 23:35:41 2003 for Crypto++ by doxygen 1.3.2