com.nimbusds.jose
Class ECKey

java.lang.Object
  com.nimbusds.jose.JWK
      com.nimbusds.jose.ECKey

All Implemented Interfaces:

net.minidev.json.JSONAware

@Immutable
public final class ECKey
extends JWK

Public Elliptic Curve JSON Web Key (JWK). This class is immutable.

Example JSON:

 {
   "kty" : "EC",
   "crv" : "P-256",
   "x"   : "MKBCTNIcKUSDii11ySs3526iDZ8AiTo7Tu6KPAqv7D4",
   "y"   : "4Etl6SRW2YiLUrN5vfvVHuhp7x8PxltmWWlbbM4IFyM",
   "use" : "enc",
   "kid" : "1"
 }
 

See http://en.wikipedia.org/wiki/Elliptic_curve_cryptography

Version:

$version$ (2013-01-08)

Author:

Vladimir Dzhuvinov

Nested Class Summary

static class

ECKey.Curve Cryptographic curve.

Constructor Summary

ECKey(ECKey.Curve crv, Base64URL x, Base64URL y, Use use, Algorithm alg, String kid)
Creates a new public Elliptic Curve JSON Web Key (JWK) with the specified parameters.

Method Summary

ECKey.Curve	getCurve() Gets the cryptographic curve.
Base64URL	getX() Gets the 'x' coordinate for the elliptic curve point.
Base64URL	getY() Gets the 'y' coordinate for the elliptic curve point.
static ECKey	parse(net.minidev.json.JSONObject jsonObject) Parses an Elliptic Curve JWK from the specified JSON object representation.
net.minidev.json.JSONObject	toJSONObject() Returns a JSON object representation of this JWK.

Methods inherited from class com.nimbusds.jose.JWK

getAlgorithm, getKeyID, getKeyType, getKeyUse, parse, parseAlgorithm, parseKeyID, parseKeyUse, toJSONString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

ECKey

public ECKey(ECKey.Curve crv,
             Base64URL x,
             Base64URL y,
             Use use,
             Algorithm alg,
             String kid)

Creates a new public Elliptic Curve JSON Web Key (JWK) with the specified parameters.

Parameters:

crv - The cryptographic curve. Must not be null.

x - The 'x' coordinate for the elliptic curve point. It is represented as the Base64URL encoding of the coordinate's big endian representation. Must not be null.

y - The 'y' coordinate for the elliptic curve point. It is represented as the Base64URL encoding of the coordinate's big endian representation. Must not be null.

use - The key use, null if not specified.

alg - The intended JOSE algorithm for the key, null if not specified.

kid - The key ID, null if not specified.

Method Detail

getCurve

public ECKey.Curve getCurve()

Gets the cryptographic curve.

Returns:

The cryptographic curve.

getX

public Base64URL getX()

Gets the 'x' coordinate for the elliptic curve point. It is represented as the Base64URL encoding of the coordinate's big endian representation.

Returns:

The 'x' coordinate.

getY

public Base64URL getY()

Gets the 'y' coordinate for the elliptic curve point. It is represented as the Base64URL encoding of the coordinate's big endian representation.

Returns:

The 'y' coordinate.

toJSONObject

public net.minidev.json.JSONObject toJSONObject()

Description copied from class: JWK

Returns a JSON object representation of this JWK. This method is intended to be called from extending classes.

Example:

 {
   "kty" : "RSA",
   "use" : "sig",
   "kid" : "fd28e025-8d24-48bc-a51a-e2ffc8bc274b"
 }
 

Overrides:

toJSONObject in class JWK

Returns:

The JSON object representation.

parse

public static ECKey parse(net.minidev.json.JSONObject jsonObject)
                   throws ParseException

Parses an Elliptic Curve JWK from the specified JSON object representation.

Parameters:

jsonObject - The JSON object to parse. Must not be null.

Returns:

The Elliptic Curve JWK.

Throws:

ParseException - If the JSON object couldn't be parsed to a valid Elliptic Curve JWK.