Security Scol plugin
Public Member Functions | Static Public Member Functions | Protected Attributes | List of all members
Poly1305TLS_Base Class Reference

Poly1305-TLS message authentication code base class. More...

#include <poly1305.h>

Inheritance diagram for Poly1305TLS_Base:
FixedKeyLength< 32 > MessageAuthenticationCode SimpleKeyingInterface HashTransformation Algorithm Clonable

Public Member Functions

 CRYPTOPP_CONSTANT (DIGESTSIZE=16)
 
 CRYPTOPP_CONSTANT (BLOCKSIZE=16)
 
void UncheckedSetKey (const byte *key, unsigned int length, const NameValuePairs &params)
 Sets the key for this object without performing parameter validation.
 
void Update (const byte *input, size_t length)
 Updates a hash with additional input.
 
void TruncatedFinal (byte *mac, size_t size)
 Computes the hash of the current message.
 
void Restart ()
 Restart the hash.
 
unsigned int BlockSize () const
 Provides the block size of the compression function.
 
unsigned int DigestSize () const
 
- Public Member Functions inherited from FixedKeyLength< 32 >
 CRYPTOPP_CONSTANT (KEYLENGTH=N)
 The default key length used by the algorithm provided as a constant.
 
 CRYPTOPP_CONSTANT (MIN_KEYLENGTH=N)
 The minimum key length used by the algorithm provided as a constant.
 
 CRYPTOPP_CONSTANT (MAX_KEYLENGTH=N)
 The maximum key length used by the algorithm provided as a constant.
 
 CRYPTOPP_CONSTANT (DEFAULT_KEYLENGTH=N)
 The default key length used by the algorithm provided as a constant.
 
 CRYPTOPP_CONSTANT (IV_REQUIREMENT=SimpleKeyingInterface::NOT_RESYNCHRONIZABLE)
 The default IV requirements for the algorithm provided as a constant.
 
 CRYPTOPP_CONSTANT (IV_LENGTH=0)
 The default IV length used by the algorithm provided as a constant.
 
CRYPTOPP_STATIC_CONSTEXPR size_t CRYPTOPP_API StaticGetValidKeyLength (size_t keylength)
 The default key length for the algorithm provided by a static function.
 
- Public Member Functions inherited from SimpleKeyingInterface
virtual size_t MinKeyLength () const =0
 Returns smallest valid key length.
 
virtual size_t MaxKeyLength () const =0
 Returns largest valid key length.
 
virtual size_t DefaultKeyLength () const =0
 Returns default key length.
 
virtual size_t GetValidKeyLength (size_t keylength) const =0
 Returns a valid key length for the algorithm.
 
virtual bool IsValidKeyLength (size_t keylength) const
 Returns whether keylength is a valid key length.
 
virtual void SetKey (const byte *key, size_t length, const NameValuePairs &params=g_nullNameValuePairs)
 Sets or reset the key of this object.
 
void SetKeyWithRounds (const byte *key, size_t length, int rounds)
 Sets or reset the key of this object.
 
void SetKeyWithIV (const byte *key, size_t length, const byte *iv, size_t ivLength)
 Sets or reset the key of this object.
 
void SetKeyWithIV (const byte *key, size_t length, const byte *iv)
 Sets or reset the key of this object.
 
virtual IV_Requirement IVRequirement () const =0
 Minimal requirement for secure IVs.
 
bool IsResynchronizable () const
 Determines if the object can be resynchronized.
 
bool CanUseRandomIVs () const
 Determines if the object can use random IVs.
 
bool CanUsePredictableIVs () const
 Determines if the object can use random but possibly predictable IVs.
 
bool CanUseStructuredIVs () const
 Determines if the object can use structured IVs.
 
virtual unsigned int IVSize () const
 Returns length of the IV accepted by this object.
 
unsigned int DefaultIVLength () const
 Provides the default size of an IV.
 
virtual unsigned int MinIVLength () const
 Provides the minimum size of an IV.
 
virtual unsigned int MaxIVLength () const
 Provides the maximum size of an IV.
 
virtual void Resynchronize (const byte *iv, int ivLength=-1)
 Resynchronize with an IV.
 
virtual void GetNextIV (RandomNumberGenerator &rng, byte *iv)
 Retrieves a secure IV for the next message.
 
- Public Member Functions inherited from HashTransformation
HashTransformationRef ()
 Provides a reference to this object.
 
virtual byteCreateUpdateSpace (size_t &size)
 Request space which can be written into by the caller.
 
virtual void Final (byte *digest)
 Computes the hash of the current message.
 
unsigned int TagSize () const
 
virtual unsigned int OptimalBlockSize () const
 Provides the input block size most efficient for this hash.
 
virtual unsigned int OptimalDataAlignment () const
 Provides input and output data alignment for optimal performance.
 
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.
 
virtual bool Verify (const byte *digest)
 Verifies the hash of the current message.
 
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.
 
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.
 
virtual bool TruncatedVerify (const byte *digest, size_t digestLength)
 Verifies the hash of the current message.
 
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.
 
- Public Member Functions inherited from Algorithm
 Algorithm (bool checkSelfTestStatus=true)
 Interface for all crypto algorithms.
 
virtual std::string AlgorithmName () const
 Provides the name of this algorithm.
 
virtual std::string AlgorithmProvider () const
 Retrieve the provider of this algorithm.
 
- Public Member Functions inherited from Clonable
virtual ClonableClone () const
 Copies this object.
 

Static Public Member Functions

static std::string StaticAlgorithmName ()
 

Protected Attributes

FixedSizeAlignedSecBlock< word32, 5 > m_h
 
FixedSizeAlignedSecBlock< word32, 4 > m_r
 
FixedSizeAlignedSecBlock< word32, 4 > m_n
 
FixedSizeAlignedSecBlock< byte, BLOCKSIZE > m_acc
 
size_t m_idx
 

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 Member Functions inherited from MessageAuthenticationCode
const AlgorithmGetAlgorithm () const
 Returns the base class Algorithm.
 
- Protected Member Functions inherited from SimpleKeyingInterface
void ThrowIfInvalidKeyLength (size_t length)
 Validates the key length.
 
void ThrowIfResynchronizable ()
 Validates the object.
 
void ThrowIfInvalidIV (const byte *iv)
 Validates the IV.
 
size_t ThrowIfInvalidIVLength (int length)
 Validates the IV length.
 
const byteGetIVAndThrowIfInvalid (const NameValuePairs &params, size_t &size)
 Retrieves and validates the IV.
 
void AssertValidKeyLength (size_t length) const
 Validates the key length.
 
- Protected Member Functions inherited from HashTransformation
void ThrowIfInvalidTruncatedSize (size_t size) const
 Validates a truncated digest size.
 

Detailed Description

Poly1305-TLS message authentication code base class.

Poly1305TLS_Base is the base class of the IETF's Poly1305 algorithm.

Since
Crypto++ 8.1

Definition at line 164 of file poly1305.h.

Constructor & Destructor Documentation

◆ ~Poly1305TLS_Base()

virtual Poly1305TLS_Base::~Poly1305TLS_Base ( )
inlinevirtual

Definition at line 171 of file poly1305.h.

◆ Poly1305TLS_Base()

Poly1305TLS_Base::Poly1305TLS_Base ( )
inline

Definition at line 172 of file poly1305.h.

Member Function Documentation

◆ BlockSize()

unsigned int Poly1305TLS_Base::BlockSize ( ) const
inlinevirtual

Provides the block size of the compression function.

Returns
block size of the compression function, in bytes

BlockSize() will return 0 if the hash is not block based or does not have an equivalent block size. For example, Keccak and SHA-3 do not have a block size, but they do have an equivalent block size called rate expressed as r.

Reimplemented from HashTransformation.

Definition at line 179 of file poly1305.h.

◆ DigestSize()

unsigned int Poly1305TLS_Base::DigestSize ( ) const
inlinevirtual

Provides the digest size of the hash

Returns
the digest size of the hash.

Implements HashTransformation.

Definition at line 180 of file poly1305.h.

◆ Restart()

void Poly1305TLS_Base::Restart ( )
virtual

Restart the hash.

Discards the current state, and restart for a new message

Reimplemented from HashTransformation.

Definition at line 394 of file poly1305.cpp.

◆ StaticAlgorithmName()

static std::string Poly1305TLS_Base::StaticAlgorithmName ( )
inlinestatic

Definition at line 167 of file poly1305.h.

◆ TruncatedFinal()

void Poly1305TLS_Base::TruncatedFinal ( byte digest,
size_t  digestSize 
)
virtual

Computes the hash of the current message.

Parameters
digesta pointer to the buffer to receive the hash
digestSizethe size of the truncated digest, in bytes

TruncatedFinal() calls Final() and then copies digestSize bytes to digest. The hash is restarted the hash for the next message.

Precondition
COUNTOF(digest) <= DigestSize() or COUNTOF(digest) <= HASH::DIGESTSIZE ensures the output byte buffer is a valid size.

Implements HashTransformation.

Definition at line 374 of file poly1305.cpp.

◆ UncheckedSetKey()

void Poly1305TLS_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 315 of file poly1305.cpp.

◆ Update()

void Poly1305TLS_Base::Update ( const byte input,
size_t  length 
)
virtual

Updates a hash with additional input.

Parameters
inputthe additional input as a buffer
lengththe size of the buffer, in bytes

Implements HashTransformation.

Definition at line 335 of file poly1305.cpp.

Member Data Documentation

◆ m_acc

FixedSizeAlignedSecBlock<byte, BLOCKSIZE> Poly1305TLS_Base::m_acc
protected

Definition at line 189 of file poly1305.h.

◆ m_h

FixedSizeAlignedSecBlock<word32, 5> Poly1305TLS_Base::m_h
protected

Definition at line 184 of file poly1305.h.

◆ m_idx

size_t Poly1305TLS_Base::m_idx
protected

Definition at line 190 of file poly1305.h.

◆ m_n

FixedSizeAlignedSecBlock<word32, 4> Poly1305TLS_Base::m_n
protected

Definition at line 186 of file poly1305.h.

◆ m_r

FixedSizeAlignedSecBlock<word32, 4> Poly1305TLS_Base::m_r
protected

Definition at line 185 of file poly1305.h.


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