Crypto++  5.6.3
Free C++ class library of cryptographic schemes
Public Member Functions | List of all members
PK_Signer Class Referenceabstract

Interface for public-key signers. More...

+ Inheritance diagram for PK_Signer:

Public Member Functions

virtual PK_MessageAccumulatorNewSignatureAccumulator (RandomNumberGenerator &rng) const =0
 create a new HashTransformation to accumulate the message to be signed
 
virtual void InputRecoverableMessage (PK_MessageAccumulator &messageAccumulator, const byte *recoverableMessage, size_t recoverableMessageLength) const =0
 
virtual size_t Sign (RandomNumberGenerator &rng, PK_MessageAccumulator *messageAccumulator, byte *signature) const
 sign and delete messageAccumulator (even in case of exception thrown) More...
 
virtual size_t SignAndRestart (RandomNumberGenerator &rng, PK_MessageAccumulator &messageAccumulator, byte *signature, bool restart=true) const =0
 sign and restart messageAccumulator More...
 
virtual size_t SignMessage (RandomNumberGenerator &rng, const byte *message, size_t messageLen, byte *signature) const
 sign a message More...
 
virtual size_t SignMessageWithRecovery (RandomNumberGenerator &rng, const byte *recoverableMessage, size_t recoverableMessageLength, const byte *nonrecoverableMessage, size_t nonrecoverableMessageLength, byte *signature) const
 sign a recoverable message More...
 
virtual size_t SignatureLength () const =0
 signature length if it only depends on the key, otherwise 0
 
virtual size_t MaxSignatureLength (size_t recoverablePartLength=0) const
 maximum signature length produced for a given length of recoverable message part
 
virtual size_t MaxRecoverableLength () const =0
 length of longest message that can be recovered, or 0 if this signature scheme does not support message recovery
 
virtual size_t MaxRecoverableLengthFromSignatureLength (size_t signatureLength) const =0
 length of longest message that can be recovered from a signature of given length, or 0 if this signature scheme does not support message recovery
 
virtual bool IsProbabilistic () const =0
 requires a random number generator to sign More...
 
virtual bool AllowNonrecoverablePart () const =0
 whether or not a non-recoverable message part can be signed
 
virtual bool SignatureUpfront () const
 if this function returns true, during verification you must input the signature before the message, otherwise you can input it at anytime */
 
virtual bool RecoverablePartFirst () const =0
 whether you must input the recoverable part before the non-recoverable part during signing
 
CryptoMaterialAccessMaterial ()
 returns a reference to the crypto material used by this object
 
const CryptoMaterialGetMaterial () const
 returns a const reference to the crypto material used by this object
 
virtual PrivateKeyAccessPrivateKey ()=0
 
virtual const PrivateKeyGetPrivateKey () const
 
void BERDecode (BufferedTransformation &bt)
 for backwards compatibility, calls AccessMaterial().Load(bt)
 
void DEREncode (BufferedTransformation &bt) const
 for backwards compatibility, calls GetMaterial().Save(bt)
 
virtual std::string AlgorithmName () const
 Provides the name of this algorithm. More...
 
virtual ClonableClone () const
 Copies this object. More...
 

Detailed Description

Interface for public-key signers.

Definition at line 2310 of file cryptlib.h.

Member Function Documentation

size_t PK_Signer::Sign ( RandomNumberGenerator rng,
PK_MessageAccumulator messageAccumulator,
byte *  signature 
) const
virtual

sign and delete messageAccumulator (even in case of exception thrown)

Precondition
size of signature == MaxSignatureLength()
Returns
actual signature length

Definition at line 869 of file cryptlib.cpp.

virtual size_t PK_Signer::SignAndRestart ( RandomNumberGenerator rng,
PK_MessageAccumulator messageAccumulator,
byte *  signature,
bool  restart = true 
) const
pure virtual

sign and restart messageAccumulator

Precondition
size of signature == MaxSignatureLength()
Returns
actual signature length

Implemented in DL_SignerBase< T >, DL_SignerBase< SCHEME_OPTIONS::Element >, and TF_SignerBase.

size_t PK_Signer::SignMessage ( RandomNumberGenerator rng,
const byte *  message,
size_t  messageLen,
byte *  signature 
) const
virtual

sign a message

Precondition
size of signature == MaxSignatureLength()
Returns
actual signature length

Definition at line 875 of file cryptlib.cpp.

References HashTransformation::Update().

Referenced by FixedRNG::GenerateBlock().

size_t PK_Signer::SignMessageWithRecovery ( RandomNumberGenerator rng,
const byte *  recoverableMessage,
size_t  recoverableMessageLength,
const byte *  nonrecoverableMessage,
size_t  nonrecoverableMessageLength,
byte *  signature 
) const
virtual

sign a recoverable message

Precondition
size of signature == MaxSignatureLength(recoverableMessageLength)
Returns
actual signature length

Definition at line 882 of file cryptlib.cpp.

References HashTransformation::Update().

Referenced by FixedRNG::GenerateBlock().

virtual bool PK_SignatureScheme::IsProbabilistic ( ) const
pure virtualinherited

requires a random number generator to sign

if this returns false, NullRNG() can be passed to functions that take RandomNumberGenerator &

virtual std::string Algorithm::AlgorithmName ( ) const
inlinevirtualinherited

Provides the name of this algorithm.

Returns
the standard algorithm name

The standard algorithm name can be a name like AES or AES/GCM. Some algorithms do not have standard names yet. For example, there is no standard algorithm name for Shoup's ECIES.

Note
AlgorithmName is not universally implemented yet

Reimplemented in AuthenticatedSymmetricCipher, SignatureVerificationFilter, SignerFilter, AuthenticatedDecryptionFilter, HashVerificationFilter, HashFilter, StreamTransformationFilter, ClassNullRNG, BitBucket, RDSEED, DH_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >, HMAC< T >, RDRAND, CRC32, GCM_Base, Adler32, EAX_Base, CCM_Base, SHA3, and VMAC_Base.

Definition at line 488 of file cryptlib.h.

Referenced by VariableRounds< 6, 2 >::StaticGetDefaultRounds().

virtual Clonable* Clonable::Clone ( ) const
inlinevirtualinherited

Copies this object.

Returns
a copy of this object
Exceptions
NotImplemented
Note
this is not implemented by most classes
See also
NotCopyable

Definition at line 464 of file cryptlib.h.


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