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()
    Creates and returns a copy of this object.
    boolean
    equals(Object obj)
    Indicates whether some other object is "equal to" this one.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    Finalization is deprecated and subject to removal in a future release.
    final Class<?>
    getClass()
    Returns the runtime class of this Object.
    int
    hashCode()
    Returns a hash code value for this object.
    final void
    notify()
    Wakes up a single thread that is waiting on this object's monitor.
    final void
    notifyAll()
    Wakes up all threads that are waiting on this object's monitor.
    String
    toString()
    Returns a string representation of the object.
    final void
    wait()
    Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
    final void
    wait(long timeoutMillis)
    Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
    final void
    wait(long timeoutMillis, int nanos)
    Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

  • 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.