Panama stream cipher operation. More...

#include <panama.h>

Inheritance diagram for PanamaCipherPolicy:

Collaboration diagram for PanamaCipherPolicy:

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

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

bool	CipherIsRandomAccess () const
	Flag indicating random access. More...

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

unsigned int	GetAlignment () const
	Provides data alignment requirements. More...

Protected Member Functions inherited from Panama< B >
void	Reset ()

void	Iterate (size_t count, const word32 p=NULL, byte output=NULL, const byte *input=NULL, KeystreamOperation operation=WRITE_KEYSTREAM)

Protected Attributes
FixedSizeSecBlock< word32, 8 >	m_key

Protected Attributes inherited from Panama< B >
FixedSizeAlignedSecBlock< word32, 20+8 *32 >	m_state

Additional Inherited Members
Public Types inherited from AdditiveCipherConcretePolicy< word32, 8 >
typedef word32	WordType

Public Member Functions inherited from AdditiveCipherConcretePolicy< word32, 8 >
unsigned int	GetAlignment () const
	Provides data alignment requirements. More...

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

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

bool	CanOperateKeystream () const
	Flag indicating. More...

Public Member Functions inherited from AdditiveCipherAbstractPolicy
virtual	~AdditiveCipherAbstractPolicy ()

virtual unsigned int	GetOptimalBlockSize () const
	Provides number of ideal bytes to process. More...

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

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

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

Public Member Functions inherited from FixedKeyLength< 32, SimpleKeyingInterface::UNIQUE_IV, 32 >
CRYPTOPP_STATIC_CONSTEXPR size_t CRYPTOPP_API	StaticGetValidKeyLength (size_t keylength)
	The default key length used by the algorithm provided as a constant. More...

Protected Types inherited from Panama< B >
typedef word32	Stage[8]

Detailed Description

template<class B>
class PanamaCipherPolicy

Panama stream cipher operation.

Definition at line 137 of file panama.h.

Member Function Documentation

template<class B >

bool PanamaCipherPolicy::CipherIsRandomAccess ( ) const

inlineprotectedvirtual

Flag indicating random access.

Returns: true if the cipher is seekable, false otherwise

See also: SeekToIteration()

Implements AdditiveCipherAbstractPolicy.

Definition at line 144 of file panama.h.

template<class B >

void PanamaCipherPolicy< 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 460 of file panama.cpp.

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template<class B >

void PanamaCipherPolicy< 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 452 of file panama.cpp.

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template<class B >

unsigned int PanamaCipherPolicy::GetAlignment ( ) const

protectedvirtual

Provides data alignment requirements.

Returns: data alignment requirements, in bytes

Internally, the default implementation returns 1. If the stream cipher is implemented using an SSE2 ASM or intrinsics, then the value returned is usually 16.

Reimplemented from AdditiveCipherAbstractPolicy.

Definition at line 489 of file panama.cpp.

template<class B >

void PanamaCipherPolicy< 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().