Crypto++  5.6.5
Free C++ class library of cryptographic schemes
Public Member Functions | List of all members
CFB_CipherAbstractPolicy Class Referenceabstract

Policy object for feeback based stream ciphers. More...

+ Inheritance diagram for CFB_CipherAbstractPolicy:

Public Member Functions

virtual unsigned int GetAlignment () const =0
 Provides data alignment requirements. More...
virtual unsigned int GetBytesPerIteration () const =0
 Provides number of bytes operated upon during an iteration. More...
virtual byte * GetRegisterBegin ()=0
 Access the feedback register. More...
virtual void TransformRegister ()=0
virtual bool CanIterate () const
 Flag indicating iteration support. More...
virtual void Iterate (byte *output, const byte *input, CipherDir dir, size_t iterationCount)
 Iterate the cipher. More...
virtual void CipherSetKey (const NameValuePairs &params, const byte *key, size_t length)=0
 Key the cipher. More...
virtual void CipherResynchronize (const byte *iv, size_t length)
 Resynchronize the cipher. More...

Detailed Description

Policy object for feeback based stream ciphers.

Definition at line 350 of file strciphr.h.

Member Function Documentation

virtual unsigned int CFB_CipherAbstractPolicy::GetAlignment ( ) const
pure virtual

Provides data alignment requirements.

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.

virtual unsigned int CFB_CipherAbstractPolicy::GetBytesPerIteration ( ) const
pure virtual

Provides number of bytes operated upon during an iteration.

bytes operated upon during an iteration, in bytes
See also
virtual byte* CFB_CipherAbstractPolicy::GetRegisterBegin ( )
pure virtual

Access the feedback register.

pointer to the first byte of the feedback register
virtual bool CFB_CipherAbstractPolicy::CanIterate ( ) const

Flag indicating iteration support.

true if the cipher supports iteration, false otherwise

Definition at line 375 of file strciphr.h.

virtual void CFB_CipherAbstractPolicy::Iterate ( byte *  output,
const byte *  input,
CipherDir  dir,
size_t  iterationCount 

Iterate the cipher.

outputthe output buffer
inputthe input buffer
dirthe direction of the cipher
iterationCountthe number of iterations to perform on the input
See also
IsSelfInverting() and IsForwardTransformation()

Definition at line 383 of file strciphr.h.

virtual void CFB_CipherAbstractPolicy::CipherSetKey ( const NameValuePairs params,
const byte *  key,
size_t  length 
pure virtual

Key the cipher.

paramsset of NameValuePairs use to initialize this object
keya byte array used to key the cipher
lengththe size of the key array
virtual void CFB_CipherAbstractPolicy::CipherResynchronize ( const byte *  iv,
size_t  length 

Resynchronize the cipher.

iva byte array used to resynchronize the cipher
lengththe size of the IV array

Definition at line 396 of file strciphr.h.

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