Class ECParameterSpec

java.lang.Object
java.security.spec.ECParameterSpec
All Implemented Interfaces:
AlgorithmParameterSpec
public class ECParameterSpec extends Object implements AlgorithmParameterSpec
This immutable class specifies the set of domain parameters used with elliptic curve cryptography (ECC).
Since:
1.5
See Also:

  • Constructor Summary

    Constructors
    Constructor
    Description
    ECParameterSpec(EllipticCurve curve, ECPoint g, BigInteger n, int h)
    Creates elliptic curve domain parameters based on the specified values.

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    getCofactor()
    Returns the cofactor.
    EllipticCurve
    getCurve()
    Returns the elliptic curve that this parameter defines.
    ECPoint
    getGenerator()
    Returns the generator which is also known as the base point.
    BigInteger
    getOrder()
    Returns the order of the generator.

    Methods declared in class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
    Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
    boolean
    equals(Object o)
    Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    May cause performance issues, deadlocks and hangs.
    final Class<? extends Object>
    getClass()
    Answers the unique instance of java.lang.Class which represents the class of the receiver.
    int
    hashCode()
    Answers an integer hash code for the receiver.
    final void
    notify()
    Causes one thread which is waiting on the receiver to be made ready to run.
    final void
    notifyAll()
    Causes all threads which are waiting on the receiver to be made ready to run.
    String
    toString()
    Answers a string containing a concise, human-readable description of the receiver.
    final void
    wait()
    Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
    final void
    wait(long time)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
    final void
    wait(long time, int frac)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

  • Constructor Details

    • ECParameterSpec

      public ECParameterSpec(EllipticCurve curve, ECPoint g, BigInteger n, int h)
      Creates elliptic curve domain parameters based on the specified values.
      Parameters:
      curve - the elliptic curve which this parameter defines.
      g - the generator which is also known as the base point.
      n - the order of the generator g.
      h - the cofactor.
      Throws:
      NullPointerException - if curve, g, or n is null.
      IllegalArgumentException - if n or h is not positive.

  • Method Details

    • getCurve

      public EllipticCurve getCurve()
      Returns the elliptic curve that this parameter defines.
      Returns:
      the elliptic curve that this parameter defines.

    • getGenerator

      public ECPoint getGenerator()
      Returns the generator which is also known as the base point.
      Returns:
      the generator which is also known as the base point.

    • getOrder

      public BigInteger getOrder()
      Returns the order of the generator.
      Returns:
      the order of the generator.

    • getCofactor

      public int getCofactor()
      Returns the cofactor.
      Returns:
      the cofactor.