de.flexiprovider.ec.asn1
Class Curve

java.lang.Object
  |
  +--java.util.AbstractCollection
        |
        +--java.util.AbstractList
              |
              +--java.util.ArrayList
                    |
                    +--codec.asn1.ASN1AbstractCollection
                          |
                          +--codec.asn1.ASN1Sequence
                                |
                                +--de.flexiprovider.ec.asn1.Curve

All Implemented Interfaces:

codec.asn1.ASN1Collection, codec.asn1.ASN1Type, java.lang.Cloneable, java.util.Collection, java.io.Externalizable, java.util.List, java.io.Serializable

public class Curve

extends codec.asn1.ASN1Sequence

This class represents a Curve as defined in ANS X9.62 - 1998. The ASN.1 definition of this structure is

  Curve ::= SEQUENCE {
   a     fieldElement,
   b     fieldElement,
   seed  BIT STRING OPTIONAL,
 }
 
  FieldElement ::= OCTET STRING;
 

Parameters Parameters are the Parameters defined in the internet draft ... for elliptic curves

Author:

Michele Boivin

See Also:

Serialized Form

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

Curve()
Default constructor.

Curve(codec.asn1.ASN1OctetString a, codec.asn1.ASN1OctetString b)
Constructor from two curve coefficients.

Curve(GFElement a, GFElement b)
Constructor from two curve coefficients.

Method Summary

(package private) byte[]	getA()
(package private) byte[]	getB()

Methods inherited from class codec.asn1.ASN1Sequence

getTag

Methods inherited from class codec.asn1.ASN1AbstractCollection

checkConstraints, decode, encode, getCollection, getConstraint, getTagClass, getValue, isExplicit, isOptional, isType, readExternal, setConstraint, setExplicit, setOptional, toString, writeExternal

Methods inherited from class java.util.ArrayList

add, add, addAll, addAll, clear, clone, contains, ensureCapacity, get, indexOf, isEmpty, lastIndexOf, remove, removeRange, set, size, toArray, toArray, trimToSize

Methods inherited from class java.util.AbstractList

equals, hashCode, iterator, listIterator, listIterator, subList

Methods inherited from class java.util.AbstractCollection

containsAll, remove, removeAll, retainAll

Methods inherited from class java.lang.Object

, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, iterator, remove, removeAll, retainAll, size, toArray, toArray

Methods inherited from interface java.util.List

containsAll, equals, hashCode, iterator, listIterator, listIterator, remove, removeAll, retainAll, subList

Constructor Detail

Curve

public Curve()

Default constructor. The optional seed is omitted.

Curve

public Curve(codec.asn1.ASN1OctetString a,
             codec.asn1.ASN1OctetString b)

Constructor from two curve coefficients. The optional seed is omitted.

Parameters:

a - the curve coefficient a

b - the curve coefficient b

Curve

public Curve(GFElement a,
             GFElement b)

Constructor from two curve coefficients. The optional seed is omitted.

Parameters:

a - the curve coefficient a

b - the curve coefficient b

Method Detail

getA

byte[] getA()

Returns:

the curve coefficient a

getB

byte[] getB()

Returns:

the curve coefficient b