org.bouncycastle.asn1.x9

Class X9FieldID

java.lang.Object

org.bouncycastle.asn1.ASN1Object

org.bouncycastle.asn1.x9.X9FieldID

All Implemented Interfaces:

ASN1Encodable, X9ObjectIdentifiers, Encodable

public class X9FieldID
extends ASN1Object
implements X9ObjectIdentifiers

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

Field Summary

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

ansi_X9_42, ansi_X9_62, c2onb191v4, c2onb191v5, c2onb239v4, c2onb239v5, c2pnb163v1, c2pnb163v2, c2pnb163v3, c2pnb176w1, c2pnb208w1, c2pnb272w1, c2pnb304w1, c2pnb368w1, c2tnb191v1, c2tnb191v2, c2tnb191v3, c2tnb239v1, c2tnb239v2, c2tnb239v3, c2tnb359v1, c2tnb431r1, characteristic_two_field, cTwoCurve, dhEphem, dhHybrid1, dhHybrid2, dhHybridOneFlow, dhOneFlow, dhpublicnumber, dhSinglePass_cofactorDH_sha1kdf_scheme, dhSinglePass_stdDH_sha1kdf_scheme, dhStatic, ecdsa_with_SHA1, ecdsa_with_SHA2, ecdsa_with_SHA224, ecdsa_with_SHA256, ecdsa_with_SHA384, ecdsa_with_SHA512, ellipticCurve, gnBasis, id_dsa, id_dsa_with_sha1, id_ecPublicKey, id_ecSigType, id_fieldType, id_kdf_kdf2, id_kdf_kdf3, id_publicKeyType, mqv1, mqv2, mqvSinglePass_sha1kdf_scheme, ppBasis, prime_field, prime192v1, prime192v2, prime192v3, prime239v1, prime239v2, prime239v3, prime256v1, primeCurve, tpBasis, x9_42_schemes, x9_44, x9_44_components, x9_63_scheme

Constructor Summary

Constructors

Constructor and Description
X9FieldID(java.math.BigInteger primeP) Constructor for elliptic curves over prime fields F2.
X9FieldID(int m, int k1) Constructor for elliptic curves over binary fields F2m.
X9FieldID(int m, int k1, int k2, int k3) Constructor for elliptic curves over binary fields F2m.

Method Summary

Modifier and Type	Method and Description
ASN1ObjectIdentifier	getIdentifier()
static X9FieldID	getInstance(java.lang.Object obj)
ASN1Primitive	getParameters()
ASN1Primitive	toASN1Primitive() Produce a DER encoding of the following structure.

Methods inherited from class org.bouncycastle.asn1.ASN1Object

encodeTo, encodeTo, equals, getEncoded, getEncoded, hasEncodedTagValue, hashCode, toASN1Object

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)

Constructor for elliptic curves over binary fields F2m.

Parameters:

m - The exponent m of F2m.

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

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)..

Method Detail

getInstance

public static X9FieldID getInstance(java.lang.Object obj)

getIdentifier

public ASN1ObjectIdentifier getIdentifier()

getParameters

public ASN1Primitive getParameters()

toASN1Primitive

public ASN1Primitive toASN1Primitive()

Produce a DER encoding of the following structure.

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

Specified by:

toASN1Primitive in interface ASN1Encodable

Specified by:

toASN1Primitive in class ASN1Object

Returns:

a primitive representation of this object.