Crypto++
Public Types | Public Member Functions | Protected Types | Protected Member Functions | List of all members
DL_DecryptorBase< T > Class Template Referenceabstract

_ More...

#include <pubkey.h>

Inheritance diagram for DL_DecryptorBase< T >:
DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< T > > PK_Decryptor DL_Base< DL_PrivateKey< T > > PK_CryptoSystem PrivateKeyAlgorithm AsymmetricAlgorithm Algorithm Clonable

Public Types

typedef T Element
 

Public Member Functions

DecodingResult Decrypt (RandomNumberGenerator &rng, const byte *ciphertext, size_t ciphertextLength, byte *plaintext, const NameValuePairs &parameters=g_nullNameValuePairs) const
 decrypt a byte string, and return the length of plaintext More...
 
size_t MaxPlaintextLength (size_t ciphertextLength) const
 
size_t CiphertextLength (size_t plaintextLength) const
 
bool ParameterSupported (const char *name) const
 
virtual BufferedTransformationCreateDecryptionFilter (RandomNumberGenerator &rng, BufferedTransformation *attachment=NULL, const NameValuePairs &parameters=g_nullNameValuePairs) const
 create a new decryption filter More...
 
DecodingResult FixedLengthDecrypt (RandomNumberGenerator &rng, const byte *ciphertext, byte *plaintext, const NameValuePairs &parameters=g_nullNameValuePairs) const
 decrypt a fixed size ciphertext
 
virtual size_t FixedCiphertextLength () const
 return fixed ciphertext length, if one exists, otherwise return 0 More...
 
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 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 DL_PrivateKey< T > KeyInterface
 

Protected Member Functions

virtual const
DL_KeyAgreementAlgorithm
< Element > & 
GetKeyAgreementAlgorithm () const =0
 
virtual const
DL_KeyDerivationAlgorithm
< Element > & 
GetKeyDerivationAlgorithm () const =0
 
virtual const
DL_SymmetricEncryptionAlgorithm
GetSymmetricEncryptionAlgorithm () const =0
 
const DL_GroupParameters
< Element > & 
GetAbstractGroupParameters () const
 
DL_GroupParameters< Element > & AccessAbstractGroupParameters ()
 
virtual KeyInterfaceAccessKeyInterface ()=0
 
virtual const KeyInterfaceGetKeyInterface () const =0
 

Detailed Description

template<class T>
class DL_DecryptorBase< T >

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Definition at line 1179 of file pubkey.h.

Member Function Documentation

template<class T>
DecodingResult DL_DecryptorBase< T >::Decrypt ( RandomNumberGenerator rng,
const byte *  ciphertext,
size_t  ciphertextLength,
byte *  plaintext,
const NameValuePairs parameters = g_nullNameValuePairs 
) const
inlinevirtual

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 1184 of file pubkey.h.

virtual BufferedTransformation* PK_Decryptor::CreateDecryptionFilter ( RandomNumberGenerator rng,
BufferedTransformation attachment = NULL,
const NameValuePairs parameters = g_nullNameValuePairs 
) const
virtualinherited

create a new decryption filter

Note
caller is responsible for deleting the returned pointer
virtual size_t PK_CryptoSystem::FixedCiphertextLength ( ) const
inlinevirtualinherited

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.

Definition at line 1211 of file cryptlib.h.

Referenced by PK_Decryptor::FixedLengthDecrypt().


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