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GOST::Base Class Reference

GOST block cipher default operation. More...

Inheritance diagram for GOST::Base:
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Public Member Functions

void UncheckedSetKey (const byte *userKey, unsigned int length, const NameValuePairs &params)
 Sets the key for this object without performing parameter validation. More...
 
- Public Member Functions inherited from BlockCipherImpl< GOST_Info >
unsigned int BlockSize () const
 Provides the block size of the algorithm. More...
 
- Public Member Functions inherited from AlgorithmImpl< SimpleKeyingInterfaceImpl< TwoBases< BlockCipher, GOST_Info > > >
std::string AlgorithmName () const
 
- Public Member Functions inherited from SimpleKeyingInterfaceImpl< TwoBases< BlockCipher, GOST_Info > >
size_t MinKeyLength () const
 The minimum key length used by the algorithm. More...
 
size_t MaxKeyLength () const
 The maximum key length used by the algorithm. More...
 
size_t DefaultKeyLength () const
 The default key length used by the algorithm. More...
 
size_t GetValidKeyLength (size_t keylength) const
 Provides a valid key length for the algorithm. More...
 
SimpleKeyingInterface::IV_Requirement IVRequirement () const
 The default IV requirements for the algorithm. More...
 
unsigned int IVSize () const
 The default initialization vector length for the algorithm. More...
 
- Public Member Functions inherited from SimpleKeyingInterface
virtual ~SimpleKeyingInterface ()
 
virtual bool IsValidKeyLength (size_t keylength) const
 Returns whether keylength is a valid key length. More...
 
virtual void SetKey (const byte *key, size_t length, const NameValuePairs &params=g_nullNameValuePairs)
 Sets or reset the key of this object. More...
 
void SetKeyWithRounds (const byte *key, size_t length, int rounds)
 Sets or reset the key of this object. More...
 
void SetKeyWithIV (const byte *key, size_t length, const byte *iv, size_t ivLength)
 Sets or reset the key of this object. More...
 
void SetKeyWithIV (const byte *key, size_t length, const byte *iv)
 Sets or reset the key of this object. More...
 
bool IsResynchronizable () const
 Determines if the object can be resynchronized. More...
 
bool CanUseRandomIVs () const
 Determines if the object can use random IVs. More...
 
bool CanUsePredictableIVs () const
 Determines if the object can use random but possibly predictable IVs. More...
 
bool CanUseStructuredIVs () const
 Determines if the object can use structured IVs. More...
 
unsigned int DefaultIVLength () const
 Provides the default size of an IV. More...
 
virtual unsigned int MinIVLength () const
 Provides the minimum size of an IV. More...
 
virtual unsigned int MaxIVLength () const
 Provides the maximum size of an IV. More...
 
virtual void Resynchronize (const byte *iv, int ivLength=-1)
 Resynchronize with an IV. More...
 
virtual void GetNextIV (RandomNumberGenerator &rng, byte *iv)
 Retrieves a secure IV for the next message. More...
 
- Public Member Functions inherited from BlockTransformation
virtual ~BlockTransformation ()
 
virtual void ProcessAndXorBlock (const byte *inBlock, const byte *xorBlock, byte *outBlock) const =0
 Encrypt or decrypt a block. More...
 
void ProcessBlock (const byte *inBlock, byte *outBlock) const
 Encrypt or decrypt a block. More...
 
void ProcessBlock (byte *inoutBlock) const
 Encrypt or decrypt a block in place. More...
 
virtual unsigned int OptimalDataAlignment () const
 Provides input and output data alignment for optimal performance. More...
 
virtual bool IsPermutation () const
 returns true if this is a permutation (i.e. there is an inverse transformation) More...
 
virtual bool IsForwardTransformation () const =0
 Determines if the cipher is being operated in its forward direction. More...
 
virtual unsigned int OptimalNumberOfParallelBlocks () const
 Determines the number of blocks that can be processed in parallel. More...
 
virtual size_t AdvancedProcessBlocks (const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const
 Encrypt and xor multiple blocks using additional flags. More...
 
CipherDir GetCipherDirection () const
 Provides the direction of the cipher. More...
 
- Public Member Functions inherited from Algorithm
virtual ~Algorithm ()
 
 Algorithm (bool checkSelfTestStatus=true)
 Interface for all crypto algorithms. More...
 
- Public Member Functions inherited from Clonable
virtual ~Clonable ()
 
virtual ClonableClone () const
 Copies this object. More...
 
- Public Member Functions inherited from GOST_Info
CRYPTOPP_STATIC_CONSTEXPR const char * StaticAlgorithmName ()
 
- Public Member Functions inherited from FixedKeyLength< 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...
 

Static Protected Member Functions

static void PrecalculateSTable ()
 

Protected Attributes

FixedSizeSecBlock< word32, 8 > m_key
 

Static Protected Attributes

static const byte sBox [8][16]
 
static volatile bool sTableCalculated = false
 
static word32 sTable [4][256]
 

Additional Inherited Members

- Public Types inherited from SimpleKeyingInterface
enum  IV_Requirement {
  UNIQUE_IV = 0, RANDOM_IV, UNPREDICTABLE_RANDOM_IV, INTERNALLY_GENERATED_IV,
  NOT_RESYNCHRONIZABLE
}
 Secure IVs requirements as enumerated values. More...
 
- Public Types inherited from BlockTransformation
enum  FlagsForAdvancedProcessBlocks {
  BT_InBlockIsCounter =1, BT_DontIncrementInOutPointers =2, BT_XorInput =4, BT_ReverseDirection =8,
  BT_AllowParallel =16
}
 Bit flags that control AdvancedProcessBlocks() behavior. More...
 
- Static Public Member Functions inherited from AlgorithmImpl< SimpleKeyingInterfaceImpl< TwoBases< BlockCipher, GOST_Info > > >
static std::string CRYPTOPP_API StaticAlgorithmName ()
 
- Protected Member Functions inherited from BlockCipher
const AlgorithmGetAlgorithm () const
 Returns the base class Algorithm. More...
 
- Protected Member Functions inherited from SimpleKeyingInterface
void ThrowIfInvalidKeyLength (size_t length)
 Validates the key length. More...
 
void ThrowIfResynchronizable ()
 Validates the object. More...
 
void ThrowIfInvalidIV (const byte *iv)
 Validates the IV. More...
 
size_t ThrowIfInvalidIVLength (int length)
 Validates the IV length. More...
 
const byteGetIVAndThrowIfInvalid (const NameValuePairs &params, size_t &size)
 Retrieves and validates the IV. More...
 
void AssertValidKeyLength (size_t length) const
 Validates the key length. More...
 

Detailed Description

GOST block cipher default operation.

Definition at line 28 of file gost.h.

Member Function Documentation

void GOST::Base::PrecalculateSTable ( )
staticprotected

Definition at line 42 of file gost.cpp.

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void GOST::Base::UncheckedSetKey ( const byte key,
unsigned int  length,
const NameValuePairs params 
)
virtual

Sets the key for this object without performing parameter validation.

Parameters
keya byte buffer used to key the cipher
lengththe length of the byte buffer
paramsadditional parameters passed as NameValuePairs

key must be at least DEFAULT_KEYLENGTH in length.

Implements SimpleKeyingInterface.

Definition at line 33 of file gost.cpp.

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Member Data Documentation

FixedSizeSecBlock<word32, 8> GOST::Base::m_key
protected

Definition at line 40 of file gost.h.

const byte GOST::Base::sBox
staticprotected
Initial value:
={
{4, 10, 9, 2, 13, 8, 0, 14, 6, 11, 1, 12, 7, 15, 5, 3},
{14, 11, 4, 12, 6, 13, 15, 10, 2, 3, 8, 1, 0, 7, 5, 9},
{5, 8, 1, 13, 10, 3, 4, 2, 14, 15, 12, 7, 6, 0, 9, 11},
{7, 13, 10, 1, 0, 8, 9, 15, 14, 4, 6, 12, 11, 2, 5, 3},
{6, 12, 7, 1, 5, 15, 13, 8, 4, 10, 9, 14, 0, 3, 11, 2},
{4, 11, 10, 0, 7, 2, 1, 13, 3, 6, 8, 5, 9, 12, 15, 14},
{13, 11, 4, 1, 3, 15, 5, 9, 0, 10, 14, 7, 6, 8, 2, 12},
{1, 15, 13, 0, 5, 7, 10, 4, 9, 2, 3, 14, 6, 11, 8, 12}}

Definition at line 36 of file gost.h.

word32 GOST::Base::sTable
staticprotected

Definition at line 38 of file gost.h.

volatile bool GOST::Base::sTableCalculated = false
staticprotected

Definition at line 37 of file gost.h.


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