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Bouncy Castle Cryptography Library 1.33
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org.bouncycastle.asn1.x9

Class X9FieldID

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, cTwoCurve, characteristic_two_field, dhpublicnumber, ecdsa_with_SHA1, ellipticCurve, gnBasis, id_dsa, id_dsa_with_sha1, id_ecPublicKey, id_ecSigType, id_fieldType, id_publicKeyType, ppBasis, prime192v1, prime192v2, prime192v3, prime239v1, prime239v2, prime239v3, prime256v1, primeCurve, prime_field, tpBasis

Constructor Summary

X9FieldID(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.
X9FieldID(ASN1Sequence seq)

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, toASN1Object

Constructor Details

X9FieldID

public X9FieldID(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 Details

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})
  }
Overrides:
toASN1Object in interface ASN1Encodable

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