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# CBC_Decryption Class Reference

Inheritance diagram for CBC_Decryption:

List of all members.

## Detailed Description

Definition at line 237 of file modes.h.

## Public Member Functions
void | ProcessBlocks (byte *outString, const byte *inString, size_t numberOfBlocks)
IV_Requirement | IVRequirement () const
| returns the minimal requirement for secure IVs
bool | RequireAlignedInput () const
unsigned int | MinLastBlockSize () const
| returns the minimum size of the last block, 0 indicating the last block is not special
void | UncheckedSetKey (const NameValuePairs &params, const byte *key, unsigned int length, const byte *iv)
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
void | SetKey (const byte *key, size_t length, const NameValuePairs &params=g_nullNameValuePairs)
| set or reset the key of this object
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
## Static Public Member Functions
static const char *__cdecl | StaticAlgorithmName ()
## Protected Member Functions
void | ResizeBuffers ()
unsigned int | BlockSize () const
virtual void | SetFeedbackSize (unsigned int feedbackSize)
## Protected Attributes
SecByteBlock | m_temp
SecByteBlock | m_buffer
BlockCipher * | m_cipher
SecByteBlock | m_register

## Member Function Documentation

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

encrypt or decrypt an array of bytes of specified length

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

Implements StreamTransformation.

Definition at line 113 of file modes.cpp.

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

void CipherModeBase::SetKey | ( | const byte * | key,
|  | size_t | length,
|  | const NameValuePairs & | params = `g_nullNameValuePairs` |
| ) |  |  | `[virtual, inherited]`

set or reset the key of this object

Parameters:

  | params | is used to specify Rounds, BlockSize, etc

Implements SimpleKeyingInterface.

Definition at line 27 of file modes.cpp.

References SimpleKeyingInterface::GetIVAndThrowIfInvalid().

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.

Reimplemented in CTR_ModePolicy.

Definition at line 32 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:

- modes.h
- modes.cpp