org.bouncycastle.pqc.crypto.xmss

Class WOTSPlus

java.lang.Object

org.bouncycastle.pqc.crypto.xmss.WOTSPlus

public final class WOTSPlus
extends java.lang.Object

WOTS+.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	WOTSPlus(WOTSPlusParameters params) Constructs a new WOTS+ one-time signature system based on the given WOTS+ parameters.

Method Summary

Methods

Modifier and Type	Method and Description
protected KeyedHashFunctions	getKhf() Getter keyed hash functions.
protected WOTSPlusParameters	getParams() Getter parameters.
protected WOTSPlusPrivateKeyParameters	getPrivateKey() Getter private key.
protected WOTSPlusPublicKeyParameters	getPublicKey(OTSHashAddress otsHashAddress) Calculates a new public key based on the state of secretKeySeed, publicSeed and otsHashAddress.
protected WOTSPlusPublicKeyParameters	getPublicKeyFromSignature(byte[] messageDigest, WOTSPlusSignature signature, OTSHashAddress otsHashAddress) Calculates a public key based on digest and signature.
protected byte[]	getPublicSeed() Getter public seed.
protected byte[]	getSecretKeySeed() Getter secret key seed.
protected void	importKeys(byte[] secretKeySeed, byte[] publicSeed) Import keys to WOTS+ instance.
protected WOTSPlusSignature	sign(byte[] messageDigest, OTSHashAddress otsHashAddress) Creates a signature for the n-byte messageDigest.
protected boolean	verifySignature(byte[] messageDigest, WOTSPlusSignature signature, OTSHashAddress otsHashAddress) Verifies signature on message.

Methods inherited from class java.lang.Object

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

Constructor Detail

WOTSPlus

protected WOTSPlus(WOTSPlusParameters params)

Constructs a new WOTS+ one-time signature system based on the given WOTS+ parameters.

Parameters:

params - Parameters for WOTSPlus object.

Method Detail

importKeys

protected void importKeys(byte[] secretKeySeed,
              byte[] publicSeed)

Import keys to WOTS+ instance.

Parameters:

secretKeySeed - Secret key seed.

publicSeed - Public seed.

sign

protected WOTSPlusSignature sign(byte[] messageDigest,
                     OTSHashAddress otsHashAddress)

Creates a signature for the n-byte messageDigest.

Parameters:

messageDigest - Digest to sign.

otsHashAddress - OTS hash address for randomization.

Returns:

WOTS+ signature.

verifySignature

protected boolean verifySignature(byte[] messageDigest,
                      WOTSPlusSignature signature,
                      OTSHashAddress otsHashAddress)

Verifies signature on message.

Parameters:

messageDigest - The digest that was signed.

signature - Signature on digest.

otsHashAddress - OTS hash address for randomization.

Returns:

true if signature was correct false else.

getPublicKeyFromSignature

protected WOTSPlusPublicKeyParameters getPublicKeyFromSignature(byte[] messageDigest,
                                                    WOTSPlusSignature signature,
                                                    OTSHashAddress otsHashAddress)

Calculates a public key based on digest and signature.

Parameters:

messageDigest - The digest that was signed.

signature - Signarure on digest.

otsHashAddress - OTS hash address for randomization.

Returns:

WOTS+ public key derived from digest and signature.

getParams

protected WOTSPlusParameters getParams()

Getter parameters.

Returns:

params.

getKhf

protected KeyedHashFunctions getKhf()

Getter keyed hash functions.

Returns:

keyed hash functions.

getSecretKeySeed

protected byte[] getSecretKeySeed()

Getter secret key seed.

Returns:

secret key seed.

getPublicSeed

protected byte[] getPublicSeed()

Getter public seed.

Returns:

public seed.

getPrivateKey

protected WOTSPlusPrivateKeyParameters getPrivateKey()

Getter private key.

Returns:

WOTS+ private key.

getPublicKey

protected WOTSPlusPublicKeyParameters getPublicKey(OTSHashAddress otsHashAddress)

Calculates a new public key based on the state of secretKeySeed, publicSeed and otsHashAddress.

Parameters:

otsHashAddress - OTS hash address for randomization.

Returns:

WOTS+ public key.