org.bouncycastle.pqc.crypto.slhdsa

Class SLHDSASigner

java.lang.Object

org.bouncycastle.pqc.crypto.slhdsa.SLHDSASigner

All Implemented Interfaces:

MessageSigner

public class SLHDSASigner
extends java.lang.Object
implements MessageSigner

SLH-DA signer.

This version is based on the 3rd submission with deference to the updated reference implementation on github as at November 9th 2021. This version includes the changes for the countermeasure for the long-message second preimage attack - see "https://github.com/sphincs/sphincsplus/commit/61cd2695c6f984b4f4d6ed675378ed9a486cbede" for further details.

Constructor Summary

Constructors

Constructor and Description
SLHDSASigner() Base constructor.

Method Summary

Modifier and Type	Method and Description
byte[]	generateSignature(byte[] message) sign the passed in message (usually the output of a hash function).
void	init(boolean forSigning, CipherParameters param) initialise the signer for signature generation or signature verification.
protected byte[]	internalGenerateSignature(byte[] message, byte[] optRand)
protected boolean	internalVerifySignature(byte[] message, byte[] signature)
boolean	verifySignature(byte[] message, byte[] signature) verify the message message against the signature value.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SLHDSASigner

public SLHDSASigner()

Base constructor.

Method Detail

init

public void init(boolean forSigning,
                 CipherParameters param)

Description copied from interface: MessageSigner

initialise the signer for signature generation or signature verification.

Specified by:

init in interface MessageSigner

Parameters:

forSigning - true if we are generating a signature, false otherwise.

param - key parameters for signature generation.

generateSignature

public byte[] generateSignature(byte[] message)

Description copied from interface: MessageSigner

sign the passed in message (usually the output of a hash function).

Specified by:

generateSignature in interface MessageSigner

Parameters:

message - the message to be signed.

Returns:

the signature of the message

verifySignature

public boolean verifySignature(byte[] message,
                               byte[] signature)

Description copied from interface: MessageSigner

verify the message message against the signature value.

Specified by:

verifySignature in interface MessageSigner

Parameters:

message - the message that was supposed to have been signed.

signature - the signature of the message

internalVerifySignature

protected boolean internalVerifySignature(byte[] message,
                                          byte[] signature)

internalGenerateSignature

protected byte[] internalGenerateSignature(byte[] message,
                                           byte[] optRand)