org.bouncycastle.asn1.x9

Class X9FieldID

public class X9FieldID extends ASN1Encodable implements X9ObjectIdentifiers

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

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 `F_2^m`.
	X9FieldID(ASN1Sequence seq)

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

Constructor Detail

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 F_2^m.

Parameters: m The exponent m of F_2^m. k1 The integer k1 where x^m + x^k3 + x^k2 + x^k1 + 1 represents the reduction polynomial f(z). k2 The integer k2 where x^m + x^k3 + x^k2 + x^k1 + 1 represents the reduction polynomial f(z). k3 The integer k3 where x^m + x^k3 + x^k2 + x^k1 + 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})
  }