ECParameterSpec (Java Platform SE 8 ) (original) (raw)

• 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:
AlgorithmParameterSpec

• • 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

  All Methods Instance Methods Concrete Methods

  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 inherited from class java.lang.[Object](../../../java/lang/Object.html "class in java.lang")  
     `[clone](../../../java/lang/Object.html#clone--), [equals](../../../java/lang/Object.html#equals-java.lang.Object-), [finalize](../../../java/lang/Object.html#finalize--), [getClass](../../../java/lang/Object.html#getClass--), [hashCode](../../../java/lang/Object.html#hashCode--), [notify](../../../java/lang/Object.html#notify--), [notifyAll](../../../java/lang/Object.html#notifyAll--), [toString](../../../java/lang/Object.html#toString--), [wait](../../../java/lang/Object.html#wait--), [wait](../../../java/lang/Object.html#wait-long-), [wait](../../../java/lang/Object.html#wait-long-int-)`

• • Constructor Detail

     * #### ECParameterSpec  
     public ECParameterSpec([EllipticCurve](../../../java/security/spec/EllipticCurve.html "class in java.security.spec") curve,  
                            [ECPoint](../../../java/security/spec/ECPoint.html "class in java.security.spec") g,  
                            [BigInteger](../../../java/math/BigInteger.html "class in java.math") 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](../../../java/lang/NullPointerException.html "class in java.lang")` \- if `curve`,`g`, or `n` is null.  
     `[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if `n` or `h` is not positive.  

  • Method Detail

    * #### getCurve  
    public [EllipticCurve](../../../java/security/spec/EllipticCurve.html "class in java.security.spec") getCurve()  
    Returns the elliptic curve that this parameter defines.  
    Returns:  
    the elliptic curve that this parameter defines.  
    * #### getGenerator  
    public [ECPoint](../../../java/security/spec/ECPoint.html "class in java.security.spec") 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](../../../java/math/BigInteger.html "class in java.math") getOrder()  
    Returns the order of the generator.  
    Returns:  
    the order of the generator.  
    * #### getCofactor  
    public int getCofactor()  
    Returns the cofactor.  
    Returns:  
    the cofactor.

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