org.bouncycastle.asn1.x9
Class X9FieldElement

java.lang.Object
  org.bouncycastle.asn1.ASN1Encodable
      org.bouncycastle.asn1.x9.X9FieldElement

All Implemented Interfaces:

DEREncodable

public class X9FieldElement
extends ASN1Encodable

class for processing an FieldElement as a DER object.

Field Summary

private static X9IntegerConverter	converter
protected ECFieldElement	f

Fields inherited from class org.bouncycastle.asn1.ASN1Encodable

BER, DER

Constructor Summary

X9FieldElement(java.math.BigInteger p, ASN1OctetString s)

X9FieldElement(ECFieldElement f)

X9FieldElement(int m, int k1, int k2, int k3, ASN1OctetString s)

Method Summary

ECFieldElement	getValue()
DERObject	toASN1Object() Produce an object suitable for an ASN1OutputStream.

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

Field Detail

f

protected ECFieldElement f

converter

private static X9IntegerConverter converter

Constructor Detail

X9FieldElement

public X9FieldElement(ECFieldElement f)

X9FieldElement

public X9FieldElement(java.math.BigInteger p,
                      ASN1OctetString s)

X9FieldElement

public X9FieldElement(int m,
                      int k1,
                      int k2,
                      int k3,
                      ASN1OctetString s)

Method Detail

getValue

public ECFieldElement getValue()

toASN1Object

public DERObject toASN1Object()

Produce an object suitable for an ASN1OutputStream.

  FieldElement ::= OCTET STRING
 

1. if q is an odd prime then the field element is processed as an Integer and converted to an octet string according to x 9.62 4.3.1.
2. if q is 2^m then the bit string contained in the field element is converted into an octet string with the same ordering padded at the front if necessary.

Specified by:

toASN1Object in class ASN1Encodable