Crypto++
Public Types | Public Member Functions | Static Public Member Functions | Protected Types | Protected Member Functions | List of all members
DL_DecryptorImpl< SCHEME_OPTIONS > Class Template Reference

_ More...

#include <pubkey.h>

Inheritance diagram for DL_DecryptorImpl< SCHEME_OPTIONS >:
DL_ObjectImpl< DL_DecryptorBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS, SCHEME_OPTIONS::PrivateKey > DL_ObjectImplBase< DL_DecryptorBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS, SCHEME_OPTIONS::PrivateKey > AlgorithmImpl< DL_DecryptorBase< SCHEME_OPTIONS::Element >, SCHEME_OPTIONS::AlgorithmInfo > DL_DecryptorBase< SCHEME_OPTIONS::Element > DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< SCHEME_OPTIONS::Element > > PK_Decryptor DL_Base< DL_PrivateKey< SCHEME_OPTIONS::Element > > PK_CryptoSystem PrivateKeyAlgorithm AsymmetricAlgorithm Algorithm Clonable

Public Types

typedef
SCHEME_OPTIONS::PrivateKey::Element 
Element
typedef SCHEME_OPTIONS SchemeOptions

Public Member Functions

PrivateKeyAccessPrivateKey ()
PublicKeyAccessPublicKey ()
const SCHEME_OPTIONS::PrivateKey & GetKey () const
SCHEME_OPTIONS::PrivateKey & AccessKey ()
std::string AlgorithmName () const
 returns name of this algorithm, not universally implemented yet
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
size_t MaxPlaintextLength (size_t ciphertextLength) const
 maximum length of plaintext for a given ciphertext length
size_t CiphertextLength (size_t plaintextLength) const
 calculate length of ciphertext given length of plaintext
bool ParameterSupported (const char *name) const
 this object supports the use of the parameter with the given name
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
virtual size_t FixedCiphertextLength () const
 return fixed ciphertext length, if one exists, otherwise return 0
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 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 ClonableClone () const
 this is not implemented by most classes yet

Static Public Member Functions

static std::string StaticAlgorithmName ()

Protected Types

typedef DL_PrivateKey
< SCHEME_OPTIONS::Element > 
KeyInterface

Protected Member Functions

const
DL_ElgamalLikeSignatureAlgorithm
< Element > & 
GetSignatureAlgorithm () const
const DL_KeyAgreementAlgorithm
< Element > & 
GetKeyAgreementAlgorithm () const
const
DL_KeyDerivationAlgorithm
< Element > & 
GetKeyDerivationAlgorithm () const
const
DL_SymmetricEncryptionAlgorithm
GetSymmetricEncryptionAlgorithm () const
HashIdentifier GetHashIdentifier () const
const
PK_SignatureMessageEncodingMethod
GetMessageEncodingInterface () const
DL_DecryptorBase
< SCHEME_OPTIONS::Element >
::KeyInterface
AccessKeyInterface ()
const DL_DecryptorBase
< SCHEME_OPTIONS::Element >
::KeyInterface
GetKeyInterface () const
size_t GetDigestSize () const
const DL_GroupParameters
< Element > & 
GetAbstractGroupParameters () const
DL_GroupParameters< Element > & AccessAbstractGroupParameters ()

Detailed Description

template<class SCHEME_OPTIONS>
class DL_DecryptorImpl< SCHEME_OPTIONS >

_

Definition at line 1368 of file pubkey.h.

Member Function Documentation

DecodingResult DL_DecryptorBase< SCHEME_OPTIONS::Element >::Decrypt ( RandomNumberGenerator rng,
const byte *  ciphertext,
size_t  ciphertextLength,
byte *  plaintext,
const NameValuePairs parameters = g_nullNameValuePairs 
) const
inlinevirtualinherited

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.

size_t DL_CryptoSystemBase< PK_Decryptor , DL_PrivateKey< SCHEME_OPTIONS::Element > >::MaxPlaintextLength ( size_t  ciphertextLength) const
inlinevirtualinherited

Implements PK_CryptoSystem.

Definition at line 1156 of file pubkey.h.

size_t DL_CryptoSystemBase< PK_Decryptor , DL_PrivateKey< SCHEME_OPTIONS::Element > >::CiphertextLength ( size_t  plaintextLength) const
inlinevirtualinherited

Implements PK_CryptoSystem.

Definition at line 1162 of file pubkey.h.

bool DL_CryptoSystemBase< PK_Decryptor , DL_PrivateKey< SCHEME_OPTIONS::Element > >::ParameterSupported ( const char *  name) const
inlinevirtualinherited

Implements PK_CryptoSystem.

Definition at line 1168 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: