org.spongycastle.pqc.crypto

Class DigestingStateAwareMessageSigner

java.lang.Object

org.spongycastle.pqc.crypto.DigestingMessageSigner

org.spongycastle.pqc.crypto.DigestingStateAwareMessageSigner

All Implemented Interfaces:

Signer

public class DigestingStateAwareMessageSigner
extends DigestingMessageSigner

Implements the sign and verify functions for a Signature Scheme using a hash function to allow processing of large messages.

This class can be used with algorithms where the state associated with the private key changes as each signature is generated. Calling getUpdatedPrivateKey() will recover the private key that can be used to initialize a signer next time around.

Constructor Summary

Constructors

Constructor and Description
DigestingStateAwareMessageSigner(StateAwareMessageSigner messSigner, Digest messDigest)

Method Summary

Modifier and Type	Method and Description
AsymmetricKeyParameter	getUpdatedPrivateKey() Return the current version of the private key with the updated state.

Methods inherited from class org.spongycastle.pqc.crypto.DigestingMessageSigner

generateSignature, init, reset, update, update, verifySignature

Methods inherited from class java.lang.Object

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

Constructor Detail

DigestingStateAwareMessageSigner

public DigestingStateAwareMessageSigner(StateAwareMessageSigner messSigner,
                                        Digest messDigest)

Method Detail

getUpdatedPrivateKey

public AsymmetricKeyParameter getUpdatedPrivateKey()

Return the current version of the private key with the updated state.

Note: calling this method will effectively disable the Signer from being used for further signature generation without another call to init().

Returns:

an updated private key object, which can be used for later signature generation.