BlockOrientedCipherModeBase Class Reference

Inheritance diagram for BlockOrientedCipherModeBase:

CipherModeBase SymmetricCipher StreamTransformation SimpleKeyingInterface Algorithm Clonable CBC_ModeBase ECB_OneWay CBC_Decryption CBC_Encryption CBC_CTS_Decryption CBC_CTS_Encryption List of all members.

Detailed Description

Definition at line 169 of file modes.h.

Public Member Functions

void UncheckedSetKey (const byte *key, unsigned int length, const NameValuePairs &params)
unsigned int MandatoryBlockSize () const
 returns block size, if input must be processed in blocks, otherwise 1
bool IsRandomAccess () const
 returns whether this cipher supports random access
bool IsSelfInverting () const
 returns whether this transformation is self-inverting (e.g. xor with a keystream)
bool IsForwardTransformation () const
 returns whether this is an encryption object
void Resynchronize (const byte *iv)
 resynchronize with an IV
void ProcessData (byte *outString, const byte *inString, size_t length)
 encrypt or decrypt an array of bytes of specified length
size_t MinKeyLength () const
 returns smallest valid key length in bytes */
size_t MaxKeyLength () const
 returns largest valid key length in bytes */
size_t DefaultKeyLength () const
 returns default (recommended) key length in bytes */
size_t GetValidKeyLength (size_t n) const
 returns the smallest valid key length in bytes that is >= min(n, GetMaxKeyLength())
bool IsValidKeyLength (size_t n) const
 returns whether n is a valid key length
unsigned int OptimalDataAlignment () const
 returns how input should be aligned for optimal performance
unsigned int IVSize () const
 returns size of IVs used by this object
void GetNextIV (byte *IV)
 get a secure IV for the next message
virtual IV_Requirement IVRequirement () const=0
 returns the minimal requirement for secure IVs

Protected Member Functions

bool RequireAlignedInput () const
virtual void ProcessBlocks (byte *outString, const byte *inString, size_t numberOfBlocks)=0
void ResizeBuffers ()
unsigned int BlockSize () const
virtual void SetFeedbackSize (unsigned int feedbackSize)

Protected Attributes

SecByteBlock m_buffer
BlockCipherm_cipher
SecByteBlock m_register


Member Function Documentation

void BlockOrientedCipherModeBase::ProcessData ( byte *  outString,
const byte *  inString,
size_t  length 
) [virtual]

encrypt or decrypt an array of bytes of specified length

Note:
either inString == outString, or they don't overlap

Implements StreamTransformation.

Definition at line 108 of file modes.cpp.

References CipherModeBase::BlockSize(), m_buffer, CipherModeBase::m_cipher, and RequireAlignedInput().

void CipherModeBase::GetNextIV ( byte *  IV  )  [virtual, inherited]

get a secure IV for the next message

This method should be called after you finish encrypting one message and are ready to start the next one. After calling it, you must call SetKey() or Resynchronize() before using this object again. This method is not implemented on decryption objects.

Reimplemented from SimpleKeyingInterface.

Definition at line 27 of file modes.cpp.

References CipherModeBase::BlockSize(), StreamTransformation::IsForwardTransformation(), CipherModeBase::m_cipher, and CipherModeBase::m_register.


The documentation for this class was generated from the following files:
Generated on Sat Dec 23 02:07:15 2006 for Crypto++ by  doxygen 1.5.1-p1