Package org.bouncycastle.pqc.legacy.crypto.gmss

Class GMSSKeyPairGenerator

java.lang.Object

org.bouncycastle.pqc.legacy.crypto.gmss.GMSSKeyPairGenerator

All Implemented Interfaces:

AsymmetricCipherKeyPairGenerator

public class GMSSKeyPairGenerator
extends Object
implements AsymmetricCipherKeyPairGenerator

This class implements key pair generation of the generalized Merkle signature scheme (GMSS).

See Also:

• GMSSSigner

Field Summary

Fields

Modifier and Type	Field	Description
static final String	OID	The GMSS OID.

Constructor Summary

Constructors

Constructor	Description
GMSSKeyPairGenerator(GMSSDigestProvider digestProvider)	The standard constructor tries to generate the GMSS algorithm identifier with the corresponding OID.

Method Summary

Modifier and Type	Method	Description
AsymmetricCipherKeyPair	generateKeyPair()	return an AsymmetricCipherKeyPair containing the generated keys.
void	init(KeyGenerationParameters param)	intialise the key pair generator.
void	initialize(int keySize, SecureRandom secureRandom)	This method initializes the GMSS KeyPairGenerator using an integer value keySize as input.
void	initialize(KeyGenerationParameters param)	Initalizes the key pair generator using a parameter set as input

Methods inherited from class java.lang.Object

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

Field Details

OID

public static final String OID

The GMSS OID.

See Also:

• Constant Field Values

Constructor Details

GMSSKeyPairGenerator

public GMSSKeyPairGenerator(GMSSDigestProvider digestProvider)

The standard constructor tries to generate the GMSS algorithm identifier with the corresponding OID.

Parameters:

digestProvider - provider for digest implementations.

Method Details

initialize

public void initialize(int keySize,
 SecureRandom secureRandom)

This method initializes the GMSS KeyPairGenerator using an integer value keySize as input. It provides a simple use of the GMSS for testing demands.

A given keysize of less than 10 creates an amount 2^10 signatures. A keySize between 10 and 20 creates 2^20 signatures. Given an integer greater than 20 the key pair generator creates 2^40 signatures.

Parameters:

keySize - Assigns the parameters used for the GMSS signatures. There are 3 choices:
1. keysize <= 10: creates 2^10 signatures using the parameterset
P = (2, (5, 5), (3, 3), (3, 3))
2. keysize > 10 and <= 20: creates 2^20 signatures using the parameterset
P = (2, (10, 10), (5, 4), (2, 2))
3. keysize > 20: creates 2^40 signatures using the parameterset
P = (2, (10, 10, 10, 10), (9, 9, 9, 3), (2, 2, 2, 2))

secureRandom - not used by GMSS, the SHA1PRNG of the SUN Provider is always used

initialize

public void initialize(KeyGenerationParameters param)

Initalizes the key pair generator using a parameter set as input

init

public void init(KeyGenerationParameters param)

Description copied from interface: AsymmetricCipherKeyPairGenerator

intialise the key pair generator.

Specified by:

init in interface AsymmetricCipherKeyPairGenerator

Parameters:

param - the parameters the key pair is to be initialised with.

generateKeyPair

public AsymmetricCipherKeyPair generateKeyPair()

Description copied from interface: AsymmetricCipherKeyPairGenerator

return an AsymmetricCipherKeyPair containing the generated keys.

Specified by:

generateKeyPair in interface AsymmetricCipherKeyPairGenerator

Returns:

an AsymmetricCipherKeyPair containing the generated keys.