EllipticCurve

open class EllipticCurve

kotlin.Any
↳	java.security.spec.EllipticCurve

This immutable class holds the necessary values needed to represent an elliptic curve.

Summary

Public constructors
`EllipticCurve(field: ECField!, a: BigInteger!, b: BigInteger!)` Creates an elliptic curve with the specified elliptic field `field` and the coefficients `a` and `b`.
`EllipticCurve(field: ECField!, a: BigInteger!, b: BigInteger!, seed: ByteArray!)` Creates an elliptic curve with the specified elliptic field `field`, the coefficients `a` and `b`, and the `seed` used for curve generation.

Public methods
open Boolean	`equals(other: Any?)` Compares this elliptic curve for equality with the specified object.
open BigInteger!	`getA()` Returns the first coefficient `a` of the elliptic curve.
open BigInteger!	`getB()` Returns the second coefficient `b` of the elliptic curve.
open ECField!	`getField()` Returns the finite field `field` that this elliptic curve is over.
open ByteArray!	`getSeed()` Returns the seeding bytes `seed` used during curve generation.
open Int	`hashCode()` Returns a hash code value for this elliptic curve.

EllipticCurve(
    field: ECField!, 
    a: BigInteger!, 
    b: BigInteger!)

Creates an elliptic curve with the specified elliptic field field and the coefficients a and b.

Parameters
`field`	ECField!: the finite field that this elliptic curve is over.
`a`	BigInteger!: the first coefficient of this elliptic curve.
`b`	BigInteger!: the second coefficient of this elliptic curve.

Exceptions
`java.lang.NullPointerException`	if `field`, `a`, or `b` is null.
`java.lang.IllegalArgumentException`	if `a` or `b` is not null and not in `field`.

EllipticCurve(
    field: ECField!, 
    a: BigInteger!, 
    b: BigInteger!, 
    seed: ByteArray!)

Creates an elliptic curve with the specified elliptic field field, the coefficients a and b, and the seed used for curve generation.

Parameters
`field`	ECField!: the finite field that this elliptic curve is over.
`a`	BigInteger!: the first coefficient of this elliptic curve.
`b`	BigInteger!: the second coefficient of this elliptic curve.
`seed`	ByteArray!: the bytes used during curve generation for later validation. Contents of this array are copied to protect against subsequent modification.

Exceptions
`java.lang.NullPointerException`	if `field`, `a`, or `b` is null.
`java.lang.IllegalArgumentException`	if `a` or `b` is not null and not in `field`.

open fun equals(other: Any?): Boolean

Compares this elliptic curve for equality with the specified object.

Parameters
`obj`	the object to be compared.

Return
`Boolean`	true if `obj` is an instance of EllipticCurve and the field, A, and B match, false otherwise.

open fun getA(): BigInteger!

Returns the first coefficient a of the elliptic curve.

Return
`BigInteger!`	the first coefficient `a`.

open fun getB(): BigInteger!

Returns the second coefficient b of the elliptic curve.

Return
`BigInteger!`	the second coefficient `b`.

open fun getField(): ECField!

Returns the finite field field that this elliptic curve is over.

Return
`ECField!`	the field `field` that this curve is over.

open fun getSeed(): ByteArray!

Returns the seeding bytes seed used during curve generation. May be null if not specified.

Return
`ByteArray!`	the seeding bytes `seed`. A new array is returned each time this method is called.

open fun hashCode(): Int

Returns a hash code value for this elliptic curve.

Return
`Int`	a hash code value computed from the hash codes of the field, A, and B, as follows: <code>(field.hashCode() << 6) + (a.hashCode() << 4) + (b.hashCode() << 2) </code>