DL_DecryptorImpl< SCHEME_OPTIONS > Class Template Reference

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Inheritance diagram for DL_DecryptorImpl< SCHEME_OPTIONS >:

List of all members.

Public Types
typedef SCHEME_OPTIONS::PrivateKey::Element	Element
typedef SCHEME_OPTIONS	SchemeOptions
Public Member Functions
PrivateKey &	AccessPrivateKey ()
PublicKey &	AccessPublicKey ()
const SCHEME_OPTIONS::PrivateKey &	GetKey () const
SCHEME_OPTIONS::PrivateKey &	AccessKey ()
std::string	AlgorithmName () const
	Provides the name of this algorithm.
DecodingResult	Decrypt (RandomNumberGenerator &rng, const byte *ciphertext, size_t ciphertextLength, byte *plaintext, const NameValuePairs &parameters=g_nullNameValuePairs) const
	Decrypt a byte string.
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 BufferedTransformation *	CreateDecryptionFilter (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
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 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 Clonable *	Clone () const
	Copies this object.
Static Public Member Functions
static std::string	StaticAlgorithmName ()

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Detailed Description

template<class SCHEME_OPTIONS>
class DL_DecryptorImpl< SCHEME_OPTIONS >

_

Definition at line 1641 of file pubkey.h.

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Member Function Documentation

std::string AlgorithmImpl< DL_DecryptorBase< SCHEME_OPTIONS::Element > , SCHEME_OPTIONS::AlgorithmInfo >::AlgorithmName

(

)

const [inline, virtual, inherited]

Reimplemented from Algorithm.

Definition at line 42 of file simple.h.

DecodingResult DL_DecryptorBase< SCHEME_OPTIONS::Element >::Decrypt	(	RandomNumberGenerator &	rng,
		const byte *	ciphertext,
		size_t	ciphertextLength,
		byte *	plaintext,
		const NameValuePairs &	parameters = g_nullNameValuePairs
	)			const [inline, virtual, inherited]

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	additional configuration options

Returns:

the result of the decryption operation

Precondition:

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

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

See also:

PK_Encryptor

Implements PK_Decryptor.

Definition at line 1440 of file pubkey.h.

References SecBlock< T, A >::size().

size_t DL_CryptoSystemBase< PK_Decryptor , DL_PrivateKey< SCHEME_OPTIONS::Element > >::MaxPlaintextLength

(

size_t

ciphertextLength

)

const [inline, virtual, inherited]

Implements PK_CryptoSystem.

Definition at line 1408 of file pubkey.h.

size_t DL_CryptoSystemBase< PK_Decryptor , DL_PrivateKey< SCHEME_OPTIONS::Element > >::CiphertextLength

(

size_t

plaintextLength

)

const [inline, virtual, inherited]

Implements PK_CryptoSystem.

Definition at line 1414 of file pubkey.h.

bool DL_CryptoSystemBase< PK_Decryptor , DL_PrivateKey< SCHEME_OPTIONS::Element > >::ParameterSupported

(

const char *

name

)

const [inline, virtual, inherited]

Implements PK_CryptoSystem.

Definition at line 1420 of file pubkey.h.

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

create a new decryption filter

Note:

caller is responsible for deleting the returned pointer

Definition at line 864 of file cryptlib.cpp.

virtual size_t PK_CryptoSystem::FixedCiphertextLength

(

)

const [inline, virtual, inherited]

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 2151 of file cryptlib.h.

Referenced by PK_Decryptor::FixedLengthDecrypt().

virtual Clonable* Clonable::Clone

(

)

const [inline, virtual, inherited]

Copies this object.

Returns:

a copy of this object

Exceptions:

NotImplemented

Note:

this is not implemented by most classes

See also:

NotCopyable

Definition at line 464 of file cryptlib.h.

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

• pubkey.h