Crypto++ 8.5 Free C++ class library of cryptographic schemes

Public Member Functions | List of all members
TF_VerifierBase Class Reference

Trapdoor Function (TF) Verifier base class. More...

Inheritance diagram for TF_VerifierBase:

## Public Member Functions
void | InputSignature (PK_MessageAccumulator &messageAccumulator, const byte *signature, size_t signatureLength) const
| Input signature into a message accumulator. More...
bool | VerifyAndRestart (PK_MessageAccumulator &messageAccumulator) const
| Check whether messageAccumulator contains a valid signature and message, and restart messageAccumulator. More...
DecodingResult | RecoverAndRestart (byte *recoveredMessage, PK_MessageAccumulator &recoveryAccumulator) const
| Recover a message from its signature. More...
Public Member Functions inherited from TF_SignatureSchemeBase< PK_Verifier, TF_Base< TrapdoorFunction, PK_SignatureMessageEncodingMethod > >
size_t | SignatureLength () const
size_t | MaxRecoverableLength () const
size_t | MaxRecoverableLengthFromSignatureLength (size_t signatureLength) const
bool | IsProbabilistic () const
bool | AllowNonrecoverablePart () const
bool | RecoverablePartFirst () const
Public Member Functions inherited from PK_Verifier
virtual PK_MessageAccumulator * | NewVerificationAccumulator () const =0
| Create a new HashTransformation to accumulate the message to be verified. More...
virtual bool | Verify (PK_MessageAccumulator *messageAccumulator) const
| Check whether messageAccumulator contains a valid signature and message. More...
virtual bool | VerifyMessage (const byte *message, size_t messageLen, const byte *signature, size_t signatureLen) const
| Check whether input signature is a valid signature for input message. More...
virtual DecodingResult | Recover (byte *recoveredMessage, PK_MessageAccumulator *messageAccumulator) const
| Recover a message from its signature. More...
virtual DecodingResult | RecoverMessage (byte *recoveredMessage, const byte *nonrecoverableMessage, size_t nonrecoverableMessageLength, const byte *signature, size_t signatureLength) const
| Recover a message from its signature. More...
Public Member Functions inherited from PK_SignatureScheme
virtual size_t | SignatureLength () const =0
| Provides the signature length if it only depends on the key. More...
virtual size_t | MaxSignatureLength (size_t recoverablePartLength=0) const
| Provides the maximum signature length produced given the length of the recoverable message part. More...
virtual size_t | MaxRecoverableLength () const =0
| Provides the length of longest message that can be recovered. More...
virtual bool | IsProbabilistic () const =0
| Determines whether a signature scheme requires a random number generator. More...
virtual bool | AllowNonrecoverablePart () const =0
| Determines whether the non-recoverable message part can be signed. More...
virtual bool | SignatureUpfront () const
| Determines whether the signature must be input before the message. More...
virtual bool | RecoverablePartFirst () const =0
| Determines whether the recoverable part must be input before the non-recoverable part. More...
Public Member Functions inherited from PublicKeyAlgorithm
CryptoMaterial & | AccessMaterial ()
| Retrieves a reference to a Public Key. More...
const CryptoMaterial & | GetMaterial () const
| Retrieves a reference to a Public Key. More...
virtual PublicKey & | AccessPublicKey ()=0
| Retrieves a reference to a Public Key. More...
virtual const PublicKey & | GetPublicKey () const
| Retrieves a reference to a Public Key. More...
Public Member Functions inherited from Algorithm
| Algorithm (bool checkSelfTestStatus=true)
| Interface for all crypto algorithms. More...
virtual std::string | AlgorithmName () const
| Provides the name of this algorithm. More...
virtual std::string | AlgorithmProvider () const
| Retrieve the provider of this algorithm. More...
Public Member Functions inherited from Clonable
virtual Clonable * | Clone () const
| Copies this object. More...

## Detailed Description

Trapdoor Function (TF) Verifier base class.

Definition at line 521 of file pubkey.h.

## Member Function Documentation

## ◆ InputSignature()

void TF_VerifierBase::InputSignature | ( | PK_MessageAccumulator & | messageAccumulator,
|  | const byte * | signature,
|  | size_t | signatureLength
| ) |  | const
| virtual

Input signature into a message accumulator.

Parameters

  messageAccumulator | a pointer to a PK_MessageAccumulator derived class
  signature | the signature on the message
  signatureLength | the size of the signature

Implements PK_Verifier.

## ◆ VerifyAndRestart()

bool TF_VerifierBase::VerifyAndRestart | ( | PK_MessageAccumulator & | messageAccumulator | ) | const
| virtual

Check whether messageAccumulator contains a valid signature and message, and restart messageAccumulator.

Parameters

  messageAccumulator | a reference to a PK_MessageAccumulator derived class

Returns
  true if the signature is valid, false otherwise

VerifyAndRestart() restarts the messageAccumulator

Implements PK_Verifier.

## ◆ RecoverAndRestart()

DecodingResult TF_VerifierBase::RecoverAndRestart | ( | byte * | recoveredMessage,
|  | PK_MessageAccumulator & | messageAccumulator
| ) |  | const
| virtual

Recover a message from its signature.

Parameters

  recoveredMessage | a pointer to the recoverable message part to be verified
  messageAccumulator | a pointer to a PK_MessageAccumulator derived class

Returns
  the result of the verification operation

RecoverAndRestart() restarts the messageAccumulator

Precondition
  `COUNTOF(recoveredMessage) == MaxRecoverableLengthFromSignatureLength(signatureLength)`

Implements PK_Verifier.

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

- pubkey.h