TF_VerifierBase Class Reference

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Inheritance diagram for TF_VerifierBase:
TF_SignatureSchemeBase< PK_Verifier, TF_Base< TrapdoorFunction, PK_SignatureMessageEncodingMethod > > PK_Verifier TF_Base< TrapdoorFunction, PK_SignatureMessageEncodingMethod > PK_SignatureScheme PublicKeyAlgorithm AsymmetricAlgorithm Algorithm Clonable AlgorithmImpl< TF_VerifierBase, SCHEME_OPTIONS::AlgorithmInfo > TF_ObjectImplBase< TF_VerifierBase, SCHEME_OPTIONS, SCHEME_OPTIONS::PublicKey > TF_ObjectImpl< TF_VerifierBase, SCHEME_OPTIONS, SCHEME_OPTIONS::PublicKey > TF_VerifierImpl< SCHEME_OPTIONS >

List of all members.

Public Member Functions

void InputSignature (PK_MessageAccumulator &messageAccumulator, const byte *signature, size_t signatureLength) const
 input signature into a message accumulator
bool VerifyAndRestart (PK_MessageAccumulator &messageAccumulator) const
 check whether messageAccumulator contains a valid signature and message, and restart messageAccumulator
DecodingResult RecoverAndRestart (byte *recoveredMessage, PK_MessageAccumulator &recoveryAccumulator) const
 recover a message from its signature
size_t SignatureLength () const
 signature length if it only depends on the key, otherwise 0
size_t MaxRecoverableLength () const
 length of longest message that can be recovered, or 0 if this signature scheme does not support message recovery
size_t MaxRecoverableLengthFromSignatureLength (size_t signatureLength) const
 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
bool IsProbabilistic () const
 requires a random number generator to sign
bool AllowNonrecoverablePart () const
 whether or not a non-recoverable message part can be signed
bool RecoverablePartFirst () const
 whether you must input the recoverable part before the non-recoverable part during signing
virtual PK_MessageAccumulatorNewVerificationAccumulator () const =0
 create a new HashTransformation to accumulate the message to be verified
virtual bool Verify (PK_MessageAccumulator *messageAccumulator) const
 check whether messageAccumulator contains a valid signature and message, and delete messageAccumulator (even in case of exception thrown)
virtual bool VerifyMessage (const byte *message, size_t messageLen, const byte *signature, size_t signatureLength) const
 check whether input signature is a valid signature for input message
virtual DecodingResult Recover (byte *recoveredMessage, PK_MessageAccumulator *messageAccumulator) const
 recover a message from its signature
virtual DecodingResult RecoverMessage (byte *recoveredMessage, const byte *nonrecoverableMessage, size_t nonrecoverableMessageLength, const byte *signature, size_t signatureLength) const
 recover a message from its signature
virtual size_t MaxSignatureLength (size_t recoverablePartLength=0) const
 maximum signature length produced for a given length of recoverable message part
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 */
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 PublicKeyAccessPublicKey ()=0
virtual const PublicKeyGetPublicKey () 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.
virtual ClonableClone () const
 Copies this object.

Detailed Description

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Definition at line 527 of file pubkey.h.


Member Function Documentation

DecodingResult TF_VerifierBase::RecoverAndRestart ( byte *  recoveredMessage,
PK_MessageAccumulator messageAccumulator 
) const [virtual]

recover a message from its signature

Precondition:
size of recoveredMessage == MaxRecoverableLengthFromSignatureLength(signatureLength)

Implements PK_Verifier.

Definition at line 125 of file pubkey.cpp.

References HashTransformation::DigestSize().

bool TF_SignatureSchemeBase< PK_Verifier , TF_Base< TrapdoorFunction, PK_SignatureMessageEncodingMethod > >::IsProbabilistic (  )  const [inline, virtual, inherited]

Implements PK_SignatureScheme.

Definition at line 495 of file pubkey.h.

DecodingResult PK_Verifier::Recover ( byte *  recoveredMessage,
PK_MessageAccumulator messageAccumulator 
) const [virtual, inherited]

recover a message from its signature

Precondition:
size of recoveredMessage == MaxRecoverableLengthFromSignatureLength(signatureLength)

Definition at line 905 of file cryptlib.cpp.

References PK_Verifier::RecoverAndRestart().

DecodingResult PK_Verifier::RecoverMessage ( byte *  recoveredMessage,
const byte *  nonrecoverableMessage,
size_t  nonrecoverableMessageLength,
const byte *  signature,
size_t  signatureLength 
) const [virtual, inherited]

recover a message from its signature

Precondition:
size of recoveredMessage == MaxRecoverableLengthFromSignatureLength(signatureLength)

Definition at line 911 of file cryptlib.cpp.

References PK_Verifier::InputSignature(), PK_Verifier::NewVerificationAccumulator(), and PK_Verifier::RecoverAndRestart().

virtual std::string Algorithm::AlgorithmName (  )  const [inline, virtual, inherited]

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

Definition at line 488 of file cryptlib.h.

Referenced by BufferedTransformation::ChannelCreatePutSpace(), BufferedTransformation::ChannelFlush(), BufferedTransformation::ChannelMessageSeriesEnd(), BufferedTransformation::ChannelPut2(), TF_DecryptorBase::Decrypt(), TF_EncryptorBase::Encrypt(), StreamTransformation::ProcessLastBlock(), and PK_DefaultDecryptionFilter::Put2().

virtual Clonable* Clonable::Clone (  )  const [inline, virtual, inherited]

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:

Generated on 24 Mar 2016 for Crypto++ by  doxygen 1.6.1