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GCM_Final< T_BlockCipher, T_TablesOption, T_IsEncryption > Class Template Reference

GCM block cipher final implementation. More...

#include <gcm.h>

Inheritance diagram for GCM_Final< T_BlockCipher, T_TablesOption, T_IsEncryption >:
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Collaboration diagram for GCM_Final< T_BlockCipher, T_TablesOption, T_IsEncryption >:
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Public Member Functions

bool IsForwardTransformation () const
 Determines if the cipher is being operated in its forward direction. More...
 
- Public Member Functions inherited from GCM_Base
std::string AlgorithmName () const
 Provides the name of this algorithm. More...
 
size_t MinKeyLength () const
 Returns smallest valid key length. More...
 
size_t MaxKeyLength () const
 Returns largest valid key length. More...
 
size_t DefaultKeyLength () const
 Returns default key length. More...
 
size_t GetValidKeyLength (size_t n) const
 Returns a valid key length for the algorithm. More...
 
bool IsValidKeyLength (size_t n) const
 Returns whether keylength is a valid key length. More...
 
unsigned int OptimalDataAlignment () const
 Provides input and output data alignment for optimal performance. More...
 
IV_Requirement IVRequirement () const
 Minimal requirement for secure IVs. More...
 
unsigned int IVSize () const
 Returns length of the IV accepted by this object. More...
 
unsigned int MinIVLength () const
 Provides the minimum size of an IV. More...
 
unsigned int MaxIVLength () const
 Provides the maximum size of an IV. More...
 
unsigned int DigestSize () const
 Provides the digest size of the hash. More...
 
lword MaxHeaderLength () const
 Provides the maximum length of AAD that can be input. More...
 
lword MaxMessageLength () const
 Provides the maximum length of encrypted data. More...
 
- Public Member Functions inherited from AuthenticatedSymmetricCipherBase
 AuthenticatedSymmetricCipherBase ()
 
bool IsRandomAccess () const
 Determines whether the cipher supports random access. More...
 
bool IsSelfInverting () const
 Determines whether the cipher is self-inverting. More...
 
void UncheckedSetKey (const byte *key, unsigned int length, const CryptoPP::NameValuePairs &params)
 Sets the key for this object without performing parameter validation. More...
 
void SetKey (const byte *userKey, size_t keylength, const NameValuePairs &params)
 Sets or reset the key of this object. More...
 
void Restart ()
 Restart the hash. More...
 
void Resynchronize (const byte *iv, int length=-1)
 Resynchronize with an IV. More...
 
void Update (const byte *input, size_t length)
 Updates a hash with additional input. More...
 
void ProcessData (byte *outString, const byte *inString, size_t length)
 Encrypt or decrypt an array of bytes. More...
 
void TruncatedFinal (byte *mac, size_t macSize)
 Computes the hash of the current message. More...
 
- Public Member Functions inherited from AuthenticatedSymmetricCipher
virtual ~AuthenticatedSymmetricCipher ()
 
virtual lword MaxFooterLength () const
 Provides the the maximum length of AAD. More...
 
virtual bool NeedsPrespecifiedDataLengths () const
 Determines if data lengths must be specified prior to inputting data. More...
 
void SpecifyDataLengths (lword headerLength, lword messageLength, lword footerLength=0)
 Prespecifies the data lengths. More...
 
virtual void EncryptAndAuthenticate (byte *ciphertext, byte *mac, size_t macSize, const byte *iv, int ivLength, const byte *header, size_t headerLength, const byte *message, size_t messageLength)
 Encrypts and calculates a MAC in one call. More...
 
virtual bool DecryptAndVerify (byte *message, const byte *mac, size_t macLength, const byte *iv, int ivLength, const byte *header, size_t headerLength, const byte *ciphertext, size_t ciphertextLength)
 Decrypts and verifies a MAC in one call. More...
 
- Public Member Functions inherited from SimpleKeyingInterface
virtual ~SimpleKeyingInterface ()
 
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 void GetNextIV (RandomNumberGenerator &rng, byte *iv)
 Retrieves a secure IV for the next message. More...
 
- Public Member Functions inherited from HashTransformation
virtual ~HashTransformation ()
 
HashTransformationRef ()
 Provides a reference to this object. More...
 
virtual byteCreateUpdateSpace (size_t &size)
 Request space which can be written into by the caller. More...
 
virtual void Final (byte *digest)
 Computes the hash of the current message. More...
 
unsigned int TagSize () const
 Provides the tag size of the hash. More...
 
virtual unsigned int BlockSize () const
 Provides the block size of the compression function. More...
 
virtual unsigned int OptimalBlockSize () const
 Provides the input block size most efficient for this hash. More...
 
virtual void CalculateDigest (byte *digest, const byte *input, size_t length)
 Updates the hash with additional input and computes the hash of the current message. More...
 
virtual bool Verify (const byte *digest)
 Verifies the hash of the current message. More...
 
virtual bool VerifyDigest (const byte *digest, const byte *input, size_t length)
 Updates the hash with additional input and verifies the hash of the current message. More...
 
virtual void CalculateTruncatedDigest (byte *digest, size_t digestSize, const byte *input, size_t length)
 Updates the hash with additional input and computes the hash of the current message. More...
 
virtual bool TruncatedVerify (const byte *digest, size_t digestLength)
 Verifies the hash of the current message. More...
 
virtual bool VerifyTruncatedDigest (const byte *digest, size_t digestLength, const byte *input, size_t length)
 Updates the hash with additional input and verifies the hash of the current message. 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 StreamTransformation
virtual ~StreamTransformation ()
 
StreamTransformationRef ()
 Provides a reference to this object. More...
 
virtual unsigned int MandatoryBlockSize () const
 Provides the mandatory block size of the cipher. More...
 
virtual unsigned int OptimalBlockSize () const
 Provides the input block size most efficient for this cipher. More...
 
virtual unsigned int GetOptimalBlockSizeUsed () const
 Provides the number of bytes used in the current block when processing at optimal block size. More...
 
virtual void ProcessLastBlock (byte *outString, const byte *inString, size_t length)
 Encrypt or decrypt the last block of data. More...
 
virtual unsigned int MinLastBlockSize () const
 Provides the size of the last block. More...
 
void ProcessString (byte *inoutString, size_t length)
 Encrypt or decrypt a string of bytes. More...
 
void ProcessString (byte *outString, const byte *inString, size_t length)
 Encrypt or decrypt a string of bytes. More...
 
byte ProcessByte (byte input)
 Encrypt or decrypt a byte. More...
 
virtual void Seek (lword pos)
 Seek to an absolute position. More...
 

Static Public Member Functions

static std::string StaticAlgorithmName ()
 

Private Member Functions

GCM_TablesOption GetTablesOption () const
 
BlockCipherAccessBlockCipher ()
 

Private Attributes

T_BlockCipher::Encryption m_cipher
 

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...
 
- Protected Types inherited from GCM_Base
enum  { REQUIRED_BLOCKSIZE = 16, HASH_BLOCKSIZE = 16 }
 
- Protected Types inherited from AuthenticatedSymmetricCipherBase
enum  State {
  State_Start, State_KeySet, State_IVSet, State_AuthUntransformed,
  State_AuthTransformed, State_AuthFooter
}
 
- Protected Member Functions inherited from GCM_Base
bool AuthenticationIsOnPlaintext () const
 
unsigned int AuthenticationBlockSize () const
 
void SetKeyWithoutResync (const byte *userKey, size_t keylength, const NameValuePairs &params)
 
void Resync (const byte *iv, size_t len)
 
size_t AuthenticateBlocks (const byte *data, size_t len)
 
void AuthenticateLastHeaderBlock ()
 
void AuthenticateLastConfidentialBlock ()
 
void AuthenticateLastFooterBlock (byte *mac, size_t macSize)
 
SymmetricCipherAccessSymmetricCipher ()
 
const BlockCipherGetBlockCipher () const
 
byteHashBuffer ()
 
byteHashKey ()
 
byteMulTable ()
 
void ReverseHashBufferIfNeeded ()
 
- Protected Member Functions inherited from AuthenticatedSymmetricCipherBase
void AuthenticateData (const byte *data, size_t len)
 
const SymmetricCipherGetSymmetricCipher () const
 
- Protected Member Functions inherited from AuthenticatedSymmetricCipher
const AlgorithmGetAlgorithm () const
 Returns the base class Algorithm. More...
 
virtual void UncheckedSpecifyDataLengths (lword headerLength, lword messageLength, lword footerLength)
 
- Protected Member Functions inherited from SimpleKeyingInterface
virtual void UncheckedSetKey (const byte *key, unsigned int length, const NameValuePairs &params)=0
 Sets the key for this object without performing parameter validation. More...
 
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...
 
- Protected Member Functions inherited from HashTransformation
void ThrowIfInvalidTruncatedSize (size_t size) const
 Validates a truncated digest size. More...
 
- Protected Attributes inherited from GCM_Base
GCTR m_ctr
 
- Protected Attributes inherited from AuthenticatedSymmetricCipherBase
State m_state
 
unsigned int m_bufferedDataLength
 
lword m_totalHeaderLength
 
lword m_totalMessageLength
 
lword m_totalFooterLength
 
AlignedSecByteBlock m_buffer
 
- Static Protected Attributes inherited from GCM_Base
static word16 s_reductionTable [256]
 
static volatile bool s_reductionTableInitialized = false
 

Detailed Description

template<class T_BlockCipher, GCM_TablesOption T_TablesOption, bool T_IsEncryption>
class GCM_Final< T_BlockCipher, T_TablesOption, T_IsEncryption >

GCM block cipher final implementation.

Template Parameters
T_BlockCipherblock cipher
T_TablesOptiontable size, either GCM_2K_Tables or GCM_64K_Tables
T_IsEncryptiondirection in which to operate the cipher
Since
Crypto++ 5.6.0

Definition at line 101 of file gcm.h.

Member Function Documentation

template<class T_BlockCipher , GCM_TablesOption T_TablesOption, bool T_IsEncryption>
BlockCipher& GCM_Final< T_BlockCipher, T_TablesOption, T_IsEncryption >::AccessBlockCipher ( )
inlineprivatevirtual

Implements GCM_Base.

Definition at line 111 of file gcm.h.

template<class T_BlockCipher , GCM_TablesOption T_TablesOption, bool T_IsEncryption>
GCM_TablesOption GCM_Final< T_BlockCipher, T_TablesOption, T_IsEncryption >::GetTablesOption ( ) const
inlineprivatevirtual

Implements GCM_Base.

Definition at line 110 of file gcm.h.

template<class T_BlockCipher , GCM_TablesOption T_TablesOption, bool T_IsEncryption>
bool GCM_Final< T_BlockCipher, T_TablesOption, T_IsEncryption >::IsForwardTransformation ( ) const
inlinevirtual

Determines if the cipher is being operated in its forward direction.

Returns
true if DIR is ENCRYPTION, false otherwise
See also
IsForwardTransformation(), IsPermutation(), GetCipherDirection()

Implements StreamTransformation.

Definition at line 106 of file gcm.h.

template<class T_BlockCipher , GCM_TablesOption T_TablesOption, bool T_IsEncryption>
static std::string GCM_Final< T_BlockCipher, T_TablesOption, T_IsEncryption >::StaticAlgorithmName ( )
inlinestatic

Definition at line 104 of file gcm.h.

Member Data Documentation

template<class T_BlockCipher , GCM_TablesOption T_TablesOption, bool T_IsEncryption>
T_BlockCipher::Encryption GCM_Final< T_BlockCipher, T_TablesOption, T_IsEncryption >::m_cipher
private

Definition at line 112 of file gcm.h.


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