org.bouncycastle.asn1.x9

Class X9ECParameters

java.lang.Object

org.bouncycastle.asn1.ASN1Object

org.bouncycastle.asn1.x9.X9ECParameters

All Implemented Interfaces:

ASN1Encodable, X9ObjectIdentifiers, Encodable

public class X9ECParameters
extends ASN1Object
implements X9ObjectIdentifiers

ASN.1 def for Elliptic-Curve ECParameters 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
X9ECParameters(ECCurve curve, X9ECPoint g, java.math.BigInteger n)
X9ECParameters(ECCurve curve, X9ECPoint g, java.math.BigInteger n, java.math.BigInteger h)
X9ECParameters(ECCurve curve, X9ECPoint g, java.math.BigInteger n, java.math.BigInteger h, byte[] seed)

Method Summary

Modifier and Type	Method and Description
X9ECPoint	getBaseEntry() Return the ASN.1 entry representing the base point G.
ECCurve	getCurve()
X9Curve	getCurveEntry() Return the ASN.1 entry representing the Curve.
X9FieldID	getFieldIDEntry() Return the ASN.1 entry representing the FieldID.
ECPoint	getG()
java.math.BigInteger	getH()
static X9ECParameters	getInstance(java.lang.Object obj)
java.math.BigInteger	getN()
byte[]	getSeed()
boolean	hasSeed()
ASN1Primitive	toASN1Primitive() Produce an object suitable for an ASN1OutputStream.

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

X9ECParameters

public X9ECParameters(ECCurve curve,
                      X9ECPoint g,
                      java.math.BigInteger n)

X9ECParameters

public X9ECParameters(ECCurve curve,
                      X9ECPoint g,
                      java.math.BigInteger n,
                      java.math.BigInteger h)

X9ECParameters

public X9ECParameters(ECCurve curve,
                      X9ECPoint g,
                      java.math.BigInteger n,
                      java.math.BigInteger h,
                      byte[] seed)

Method Detail

getInstance

public static X9ECParameters getInstance(java.lang.Object obj)

getCurve

public ECCurve getCurve()

getG

public ECPoint getG()

getN

public java.math.BigInteger getN()

getH

public java.math.BigInteger getH()

getSeed

public byte[] getSeed()

hasSeed

public boolean hasSeed()

getCurveEntry

public X9Curve getCurveEntry()

Return the ASN.1 entry representing the Curve.

Returns:

the X9Curve for the curve in these parameters.

getFieldIDEntry

public X9FieldID getFieldIDEntry()

Return the ASN.1 entry representing the FieldID.

Returns:

the X9FieldID for the FieldID in these parameters.

getBaseEntry

public X9ECPoint getBaseEntry()

Return the ASN.1 entry representing the base point G.

Returns:

the X9ECPoint for the base point in these parameters.

toASN1Primitive

public ASN1Primitive toASN1Primitive()

Produce an object suitable for an ASN1OutputStream.

  ECParameters ::= SEQUENCE {
      version         INTEGER { ecpVer1(1) } (ecpVer1),
      fieldID         FieldID {{FieldTypes}},
      curve           X9Curve,
      base            X9ECPoint,
      order           INTEGER,
      cofactor        INTEGER OPTIONAL
  }
 

Specified by:

toASN1Primitive in interface ASN1Encodable

Specified by:

toASN1Primitive in class ASN1Object

Returns:

a primitive representation of this object.