org.bouncycastle.asn1.x9
Class X9FieldID

java.lang.Object
  org.bouncycastle.asn1.ASN1Encodable
      org.bouncycastle.asn1.x9.X9FieldID

All Implemented Interfaces:

DEREncodable, X9ObjectIdentifiers

public class X9FieldID

extends ASN1Encodable

implements X9ObjectIdentifiers

ASN.1 def for Elliptic-Curve Field ID structure. See X9.62, for further details.

Field Summary

Fields inherited from class org.bouncycastle.asn1.ASN1Encodable

BER, DER

Fields inherited from interface org.bouncycastle.asn1.x9.X9ObjectIdentifiers

ansi_X9_62, c2onb191v4, c2onb191v5, c2onb239v4, c2onb239v5, c2pnb163v1, c2pnb163v2, c2pnb163v3, c2pnb176w1, c2pnb208w1, c2pnb272w1, c2pnb368w1, c2png304v1, c2tnb191v1, c2tnb191v2, c2tnb191v3, c2tnb239v1, c2tnb239v2, c2tnb239v3, c2tnb359v1, c2tnb431r1, characteristic_two_field, cTwoCurve, dhpublicnumber, ecdsa_with_SHA1, ellipticCurve, gnBasis, id_dsa, id_dsa_with_sha1, id_ecPublicKey, id_ecSigType, id_fieldType, id_publicKeyType, ppBasis, prime_field, prime192v1, prime192v2, prime192v3, prime239v1, prime239v2, prime239v3, prime256v1, primeCurve, tpBasis

Constructor Summary

X9FieldID(ASN1Sequence seq)

X9FieldID(java.math.BigInteger primeP)
Constructor for elliptic curves over prime fields F2.

X9FieldID(int m, int k1, int k2, int k3)
Constructor for elliptic curves over binary fields F2m.

Method Summary

DERObjectIdentifier	getIdentifier()
DERObject	getParameters()
DERObject	toASN1Object() Produce a DER encoding of the following structure.

Methods inherited from class org.bouncycastle.asn1.ASN1Encodable

equals, getDEREncoded, getDERObject, getEncoded, getEncoded, hashCode

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

X9FieldID

public X9FieldID(java.math.BigInteger primeP)

Constructor for elliptic curves over prime fields F2.

Parameters:

primeP - The prime p defining the prime field.

X9FieldID

public X9FieldID(int m,
                 int k1,
                 int k2,
                 int k3)

Constructor for elliptic curves over binary fields F2m.

Parameters:

m - The exponent m of F2m.

k1 - The integer k1 where xm + xk3 + xk2 + xk1 + 1 represents the reduction polynomial f(z).

k2 - The integer k2 where xm + xk3 + xk2 + xk1 + 1 represents the reduction polynomial f(z).

k3 - The integer k3 where xm + xk3 + xk2 + xk1 + 1 represents the reduction polynomial f(z)..

X9FieldID

public X9FieldID(ASN1Sequence seq)

Method Detail

getIdentifier

public DERObjectIdentifier getIdentifier()

getParameters

public DERObject getParameters()

toASN1Object

public DERObject toASN1Object()

Produce a DER encoding of the following structure.

  FieldID ::= SEQUENCE {
      fieldType       FIELD-ID.&id({IOSet}),
      parameters      FIELD-ID.&Type({IOSet}{@fieldType})
  }
 

Specified by:

toASN1Object in class ASN1Encodable