io.jsonwebtoken.impl.security

Class EdwardsCurve

java.lang.Object

io.jsonwebtoken.impl.security.EdwardsCurve

All Implemented Interfaces:

Identifiable, Curve, KeyLengthSupplier, KeyPairBuilderSupplier

public class EdwardsCurve
extends Object
implements KeyLengthSupplier

Field Summary

Fields

Modifier and Type	Field and Description
static EdwardsCurve	Ed25519
static EdwardsCurve	Ed448
static Collection<EdwardsCurve>	VALUES
static EdwardsCurve	X25519
static EdwardsCurve	X448

Method Summary

Methods

Modifier and Type	Method and Description
boolean	contains(Key key) Returns true if the specified key is known to represent a point on the curve, false otherwise.
static PublicKey	derivePublic(PrivateKey pk) Computes the PublicKey associated with the specified Edwards-curve PrivateKey.
protected byte[]	doGetKeyMaterial(Key key) Parses the ASN.1-encoding of the specified key
boolean	equals(Object obj)
static EdwardsCurve	findById(String id)
static EdwardsCurve	findByKey(Key key)
static EdwardsCurve	forKey(Key key)
String	getId()
String	getJcaName()
int	getKeyBitLength()
byte[]	getKeyMaterial(Key key)
int	hashCode()
static boolean	isEdwards(Key key)
boolean	isSignatureCurve() Returns true if this curve is used to compute signatures, false if used for key agreement.
KeyPairBuilder	keyPair()
PrivateKey	toPrivateKey(byte[] d, Provider provider)
PublicKey	toPublicKey(byte[] x, Provider provider)
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

X25519

public static final EdwardsCurve X25519

X448

public static final EdwardsCurve X448

Ed25519

public static final EdwardsCurve Ed25519

Ed448

public static final EdwardsCurve Ed448

VALUES

public static final Collection<EdwardsCurve> VALUES

Method Detail

getKeyBitLength

public int getKeyBitLength()

Specified by:

getKeyBitLength in interface KeyLengthSupplier

getKeyMaterial

public byte[] getKeyMaterial(Key key)

doGetKeyMaterial

protected byte[] doGetKeyMaterial(Key key)

Parses the ASN.1-encoding of the specified key

Parameters:

key - the Edwards curve key

Returns:

the key value, encoded according to RFC 8032

Throws:

RuntimeException - if the key's encoded bytes do not reflect a validly ASN.1-encoded edwards key

toPublicKey

public PublicKey toPublicKey(byte[] x,
                    Provider provider)

toPrivateKey

public PrivateKey toPrivateKey(byte[] d,
                      Provider provider)

isSignatureCurve

public boolean isSignatureCurve()

Returns true if this curve is used to compute signatures, false if used for key agreement.

Returns:

true if this curve is used to compute signatures, false if used for key agreement.

keyPair

public KeyPairBuilder keyPair()

Specified by:

keyPair in interface KeyPairBuilderSupplier

isEdwards

public static boolean isEdwards(Key key)

derivePublic

public static PublicKey derivePublic(PrivateKey pk)
                              throws KeyException

Computes the PublicKey associated with the specified Edwards-curve PrivateKey.

Parameters:

pk - the Edwards-curve PrivateKey to inspect.

Returns:

the PublicKey associated with the specified Edwards-curve PrivateKey.

Throws:

KeyException - if the PrivateKey is not an Edwards-curve key or unable to access the PrivateKey's material.

findById

public static EdwardsCurve findById(String id)

findByKey

public static EdwardsCurve findByKey(Key key)

contains

public boolean contains(Key key)

Returns true if the specified key is known to represent a point on the curve, false otherwise.

Parameters:

key - the key to test

Returns:

true if the specified key is known to represent a point on the curve, false otherwise.

forKey

public static EdwardsCurve forKey(Key key)

getId

public String getId()

Specified by:

getId in interface Identifiable

getJcaName

public String getJcaName()

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object