#include <cryptlib.h>
Inheritance diagram for PK_SignatureScheme:
This class provides an interface common to signers and verifiers for querying scheme properties.
Definition at line 1192 of file cryptlib.h.
Public Member Functions | |
virtual unsigned int | SignatureLength () const =0 |
signature length if it only depends on the key, otherwise 0 | |
virtual unsigned int | MaxSignatureLength (unsigned int recoverablePartLength=0) const |
maximum signature length produced for a given length of recoverable message part | |
virtual unsigned int | MaxRecoverableLength () const =0 |
length of longest message that can be recovered, or 0 if this signature scheme does not support message recovery | |
virtual unsigned int | MaxRecoverableLengthFromSignatureLength (unsigned int 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 | |
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 |
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requires a random number generator to sign if this returns false, NullRNG() can be passed to functions that take RandomNumberGenerator & |