Free C++ class library of cryptographic schemes
Interface for public-key signers and verifiers. More...
|invalid key exception, may be thrown by any function in this class if the private or public key has a length that can't be used More...|
|key too short exception, may be thrown by any function in this class if the private or public key is too short to sign or verify anything 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 |
Interface for public-key signers and verifiers.
This class provides an interface common to signers and verifiers for querying scheme properties.