SEAL stream cipher operation. More...

#include <seal.h>

Inheritance diagram for SEAL_Policy< B >:

Protected Member Functions
void	CipherSetKey (const NameValuePairs &params, const byte *key, size_t length)
	Key the cipher.

void	OperateKeystream (KeystreamOperation operation, byte output, const byte input, size_t iterationCount)
	Operates the keystream.

void	CipherResynchronize (byte keystreamBuffer, const byte IV, size_t length)
	Resynchronize the cipher.

bool	CipherIsRandomAccess () const
	Flag indicating random access.

void	SeekToIteration (lword iterationCount)
	Seeks to a random position in the stream.

Additional Inherited Members
Public Types inherited from AdditiveCipherConcretePolicy< word32, 256 >
typedef word32	WordType
	Word type for the cipher.

Public Member Functions inherited from AdditiveCipherConcretePolicy< word32, 256 >
	CRYPTOPP_CONSTANT (BYTES_PER_ITERATION=sizeof(WordType) *W)
	Number of bytes for an iteration.

unsigned int	GetAlignment () const
	Provides data alignment requirements.

unsigned int	GetBytesPerIteration () const
	Provides number of bytes operated upon during an iteration.

unsigned int	GetIterationsToBuffer () const
	Provides buffer size based on iterations.

bool	CanOperateKeystream () const
	Flag indicating.

Public Member Functions inherited from AdditiveCipherAbstractPolicy
virtual unsigned int	GetOptimalBlockSize () const
	Provides number of ideal bytes to process.

virtual void	WriteKeystream (byte *keystream, size_t iterationCount)
	Generate the keystream.

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

Public Member Functions inherited from SEAL_Info< B >
CRYPTOPP_STATIC_CONSTEXPR const char *	StaticAlgorithmName ()

Public Member Functions inherited from FixedKeyLength< 20, SimpleKeyingInterface::INTERNALLY_GENERATED_IV, 4 >
	CRYPTOPP_CONSTANT (KEYLENGTH=N)
	The default key length used by the algorithm provided as a constant.

	CRYPTOPP_CONSTANT (MIN_KEYLENGTH=N)
	The minimum key length used by the algorithm provided as a constant.

	CRYPTOPP_CONSTANT (MAX_KEYLENGTH=N)
	The maximum key length used by the algorithm provided as a constant.

	CRYPTOPP_CONSTANT (DEFAULT_KEYLENGTH=N)
	The default key length used by the algorithm provided as a constant.

	CRYPTOPP_CONSTANT (IV_REQUIREMENT=IV_REQ)
	The default IV requirements for the algorithm provided as a constant.

	CRYPTOPP_CONSTANT (IV_LENGTH=IV_L)
	The default IV length used by the algorithm provided as a constant.

CRYPTOPP_STATIC_CONSTEXPR size_t CRYPTOPP_API	StaticGetValidKeyLength (size_t keylength)
	The default key length for the algorithm provided by a static function.

Detailed Description

template<class B = BigEndian>
class SEAL_Policy< B >

SEAL stream cipher operation.

Template Parameters

B	Endianness of the stream cipher

Since: Crypto++ 2.2

Definition at line 28 of file seal.h.

Member Function Documentation

◆ CipherIsRandomAccess()

template<class B = BigEndian>

bool SEAL_Policy< B >::CipherIsRandomAccess ( ) const

inlineprotectedvirtual

Flag indicating random access.

Returns: true if the cipher is seekable, false otherwise

See also: SeekToIteration()

Implements AdditiveCipherAbstractPolicy.

Definition at line 34 of file seal.h.

◆ CipherResynchronize()

template<class B >

void SEAL_Policy< B >::CipherResynchronize	(	byte *	keystreamBuffer,
		const byte *	iv,
		size_t	length
	)

protectedvirtual

Resynchronize the cipher.

Parameters

keystreamBuffer	the keystream buffer
iv	a byte array used to resynchronize the cipher
length	the size of the IV array

Reimplemented from AdditiveCipherAbstractPolicy.

Definition at line 75 of file seal.cpp.

◆ CipherSetKey()

template<class B >

void SEAL_Policy< B >::CipherSetKey	(	const NameValuePairs &	params,
		const byte *	key,
		size_t	length
	)

protectedvirtual

Key the cipher.

Parameters

params	set of NameValuePairs use to initialize this object
key	a byte array used to key the cipher
length	the size of the key array

Implements AdditiveCipherAbstractPolicy.

Definition at line 51 of file seal.cpp.

◆ OperateKeystream()

template<class B >

void SEAL_Policy< B >::OperateKeystream	(	KeystreamOperation	operation,
		byte *	output,
		const byte *	input,
		size_t	iterationCount
	)

protectedvirtual

Operates the keystream.

Parameters

operation	the operation with additional flags
output	the output buffer
input	the input buffer
iterationCount	the number of iterations to perform on the input

OperateKeystream() will attempt to operate upon GetOptimalBlockSize() buffer, which will be derived from GetBytesPerIteration().

See also: CanOperateKeystream(), OperateKeystream(), WriteKeystream(), KeystreamOperation()

Implements AdditiveCipherConcretePolicy< word32, 256 >.

Definition at line 93 of file seal.cpp.

◆ SeekToIteration()

template<class B >

void SEAL_Policy< B >::SeekToIteration ( lword iterationCount )

protectedvirtual

Seeks to a random position in the stream.

See also: CipherIsRandomAccess()

Reimplemented from AdditiveCipherAbstractPolicy.

Definition at line 86 of file seal.cpp.

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

G:/work/subversion/scol-technologies/trunk/scol/plugins/security/cryptopp/seal.h
G:/work/subversion/scol-technologies/trunk/scol/plugins/security/cryptopp/seal.cpp

Protected Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ CipherIsRandomAccess()

◆ CipherResynchronize()

◆ CipherSetKey()

◆ OperateKeystream()

◆ SeekToIteration()