Discrete Log (DL) decryptor base implementation. More...

#include <pubkey.h>

Inheritance diagram for DL_DecryptorBase< T >:

Public Types
typedef T	Element

Public Types inherited from DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< T > >
typedef DL_Base< DL_PrivateKey< T > >::Element	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. More...

Public Member Functions inherited from DL_CryptoSystemBase< PK_Decryptor, DL_PrivateKey< T > >
size_t	MaxPlaintextLength (size_t ciphertextLength) const

size_t	CiphertextLength (size_t plaintextLength) const

bool	ParameterSupported (const char *name) const

Public Member Functions inherited from PK_Decryptor
virtual DecodingResult	Decrypt (RandomNumberGenerator &rng, const byte ciphertext, size_t ciphertextLength, byte plaintext, const NameValuePairs &parameters=g_nullNameValuePairs) const =0
	Decrypt a byte string. More...

virtual BufferedTransformation *	CreateDecryptionFilter (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. More...

Public Member Functions inherited from PK_CryptoSystem
virtual size_t	MaxPlaintextLength (size_t ciphertextLength) const =0
	Provides the maximum length of plaintext for a given ciphertext length. More...

virtual size_t	CiphertextLength (size_t plaintextLength) const =0
	Calculate the length of ciphertext given length of plaintext. More...

virtual bool	ParameterSupported (const char *name) const =0
	Determines whether this object supports the use of a named parameter. More...

virtual size_t	FixedCiphertextLength () const
	Provides the fixed ciphertext length, if one exists. More...

virtual size_t	FixedMaxPlaintextLength () const
	Provides the maximum plaintext length given a fixed ciphertext length. More...

Public Member Functions inherited from PrivateKeyAlgorithm
CryptoMaterial &	AccessMaterial ()
	Retrieves a reference to a Private Key. More...

const CryptoMaterial &	GetMaterial () const
	Retrieves a reference to a Private Key. More...

virtual PrivateKey &	AccessPrivateKey ()=0
	Retrieves a reference to a Private Key. More...

virtual const PrivateKey &	GetPrivateKey () const
	Retrieves a reference to a Private Key. More...

virtual CryptoMaterial &	AccessMaterial ()=0
	Retrieves a reference to CryptoMaterial. More...

virtual const CryptoMaterial &	GetMaterial () const =0
	Retrieves a reference to CryptoMaterial. More...

Public Member Functions inherited from Algorithm
	Algorithm (bool checkSelfTestStatus=true)
	Interface for all crypto algorithms. More...

virtual std::string	AlgorithmName () const
	Provides the name of this algorithm. More...

virtual std::string	AlgorithmProvider () const
	Retrieve the provider of this algorithm. More...

Public Member Functions inherited from Clonable
virtual Clonable *	Clone () const
	Copies this object. More...

Detailed Description

template<class T>
class DL_DecryptorBase< T >

Discrete Log (DL) decryptor base implementation.

Template Parameters

T	Field element type or class

Field element T can be Integer, ECP or EC2N.

Definition at line 1830 of file pubkey.h.

Member Typedef Documentation

◆ Element

template<class T >

typedef T DL_DecryptorBase< T >::Element

Definition at line 1833 of file pubkey.h.

Constructor & Destructor Documentation

◆ ~DL_DecryptorBase()

template<class T >

virtual DL_DecryptorBase< T >::~DL_DecryptorBase ( )

inlinevirtual

Definition at line 1835 of file pubkey.h.

Member Function Documentation

◆ Decrypt()

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.

Parameters

rng	a RandomNumberGenerator derived class
ciphertext	the encrypted byte buffer
ciphertextLength	the size of the encrypted byte buffer
plaintext	a byte buffer to hold the decrypted string
parameters	a set of NameValuePairs to initialize this object

Returns: the result of the decryption operation

If DecodingResult::isValidCoding is true, then DecodingResult::messageLength is valid and holds the actual length of the plaintext recovered. The result is undefined if decryption failed. If DecodingResult::isValidCoding is false, then DecodingResult::messageLength is undefined.

Precondition: COUNTOF(plaintext) == MaxPlaintextLength(ciphertextLength) ensures the output byte buffer is large enough

See also: PK_Encryptor

Implements PK_Decryptor.

Definition at line 1837 of file pubkey.h.

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

pubkey.h

Public Types

Public Member Functions

Detailed Description

Member Typedef Documentation

◆ Element

Constructor & Destructor Documentation

◆ ~DL_DecryptorBase()

Member Function Documentation

◆ Decrypt()