org.bouncycastle.pqc.crypto.sdith

Class SDitHSigner

java.lang.Object

org.bouncycastle.pqc.crypto.sdith.SDitHSigner

All Implemented Interfaces:

MessageSigner

public class SDitHSigner
extends java.lang.Object
implements MessageSigner

SDitH (Syndrome-Decoding-in-the-Head) signer for the Hypercube variant.

Implements MessageSigner (one-shot whole-message signing) — the signature scheme hashes the message inside the protocol so there is no benefit to a streaming Signer API. Returned signatures are the raw SDitH signature bytes (the reference KAT generator appends the message itself; that concatenation is left to the caller / a JCA wrapper).

Constructor Summary

Constructors

Constructor and Description
SDitHSigner()

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.
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

SDitHSigner

public SDitHSigner()

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