net.i2p.crypto.eddsa

Class KeyPairGenerator

java.lang.Object

java.security.KeyPairGeneratorSpi

net.i2p.crypto.eddsa.KeyPairGenerator

Direct Known Subclasses:

RedKeyPairGenerator

public class KeyPairGenerator
extends KeyPairGeneratorSpi

Key pair generator for EdDSA (Edwards-curve Digital Signature Algorithm) keys. This implementation generates EdDSA key pairs with a default key size of 256 bits using the Ed25519 curve, which provides strong security with excellent performance characteristics. EdDSA is the recommended signature algorithm for new I2P applications.

Generated keys are suitable for:

• Digital signatures and verification
• I2P destination keys
• Router identity and communication

See Also:

RFC 8032 - EdDSA

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	DEFAULT_KEYSIZE
protected EdDSAParameterSpec	edParams
protected boolean	initialized
protected SecureRandom	random

Constructor Summary

Constructors

Constructor and Description
KeyPairGenerator()

Method Summary

Modifier and Type	Method and Description
protected EdDSANamedCurveSpec	createNamedCurveSpec(String curveName) Create an EdDSANamedCurveSpec from the provided curve name.
KeyPair	generateKeyPair()
void	initialize(AlgorithmParameterSpec params, SecureRandom random)
void	initialize(int keysize, SecureRandom random)

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_KEYSIZE

protected static final int DEFAULT_KEYSIZE

See Also:

Constant Field Values

edParams

protected EdDSAParameterSpec edParams

initialized

protected boolean initialized

random

protected SecureRandom random

Constructor Detail

KeyPairGenerator

public KeyPairGenerator()

Method Detail

createNamedCurveSpec

protected EdDSANamedCurveSpec createNamedCurveSpec(String curveName)
                                            throws InvalidAlgorithmParameterException

Create an EdDSANamedCurveSpec from the provided curve name. The current implementation fetches the pre-created curve spec from a table.

Parameters:

curveName - the EdDSA named curve.

Returns:

the specification for the named curve.

Throws:

InvalidAlgorithmParameterException - if the named curve is unknown.

generateKeyPair

public KeyPair generateKeyPair()

Specified by:

generateKeyPair in class KeyPairGeneratorSpi

initialize

public void initialize(AlgorithmParameterSpec params,
                       SecureRandom random)
                throws InvalidAlgorithmParameterException

Overrides:

initialize in class KeyPairGeneratorSpi

Throws:

InvalidAlgorithmParameterException

initialize

public void initialize(int keysize,
                       SecureRandom random)

Specified by:

initialize in class KeyPairGeneratorSpi