com.tencent.kona.sun.security.util

Class ECParameters

java.lang.Object

java.security.AlgorithmParametersSpi

com.tencent.kona.sun.security.util.ECParameters

public final class ECParameters
extends java.security.AlgorithmParametersSpi

This class implements encoding and decoding of Elliptic Curve parameters as specified in RFC 3279. However, only named curves are currently supported. ASN.1 from RFC 3279 follows. Note that X9.62 (2005) has added some additional options.

    EcpkParameters ::= CHOICE {
      ecParameters  ECParameters,
      namedCurve    OBJECT IDENTIFIER,
      implicitlyCA  NULL }

    ECParameters ::= SEQUENCE {
       version   ECPVer,          -- version is always 1
       fieldID   FieldID,         -- identifies the finite field over
                                  -- which the curve is defined
       curve     Curve,           -- coefficients a and b of the
                                  -- elliptic curve
       base      ECPoint,         -- specifies the base point P
                                  -- on the elliptic curve
       order     INTEGER,         -- the order n of the base point
       cofactor  INTEGER OPTIONAL -- The integer h = #E(Fq)/n
       }

    ECPVer ::= INTEGER {ecpVer1(1)}

    Curve ::= SEQUENCE {
       a         FieldElement,
       b         FieldElement,
       seed      BIT STRING OPTIONAL }

    FieldElement ::= OCTET STRING

    ECPoint ::= OCTET STRING
 

Since:

1.6

Constructor Summary

Constructors

Constructor and Description
ECParameters()

Method Summary

Modifier and Type	Method and Description
protected byte[]	engineGetEncoded()
protected byte[]	engineGetEncoded(java.lang.String encodingMethod)
protected <T extends java.security.spec.AlgorithmParameterSpec> T	engineGetParameterSpec(java.lang.Class<T> spec)
protected void	engineInit(java.security.spec.AlgorithmParameterSpec paramSpec)
protected void	engineInit(byte[] params)
protected void	engineInit(byte[] params, java.lang.String decodingMethod)
protected java.lang.String	engineToString()
static java.security.AlgorithmParameters	getAlgorithmParameters(java.security.spec.ECParameterSpec spec)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ECParameters

public ECParameters()

Method Detail

getAlgorithmParameters

public static java.security.AlgorithmParameters getAlgorithmParameters(java.security.spec.ECParameterSpec spec)
                                                                throws java.security.InvalidKeyException

Throws:

java.security.InvalidKeyException

engineInit

protected void engineInit(java.security.spec.AlgorithmParameterSpec paramSpec)
                   throws java.security.spec.InvalidParameterSpecException

Specified by:

engineInit in class java.security.AlgorithmParametersSpi

Throws:

java.security.spec.InvalidParameterSpecException

engineInit

protected void engineInit(byte[] params)
                   throws java.io.IOException

Specified by:

engineInit in class java.security.AlgorithmParametersSpi

Throws:

java.io.IOException

engineInit

protected void engineInit(byte[] params,
                          java.lang.String decodingMethod)
                   throws java.io.IOException

Specified by:

engineInit in class java.security.AlgorithmParametersSpi

Throws:

java.io.IOException

engineGetParameterSpec

protected <T extends java.security.spec.AlgorithmParameterSpec> T engineGetParameterSpec(java.lang.Class<T> spec)
                                                                                  throws java.security.spec.InvalidParameterSpecException

Specified by:

engineGetParameterSpec in class java.security.AlgorithmParametersSpi

Throws:

java.security.spec.InvalidParameterSpecException

engineGetEncoded

protected byte[] engineGetEncoded()
                           throws java.io.IOException

Specified by:

engineGetEncoded in class java.security.AlgorithmParametersSpi

Throws:

java.io.IOException

engineGetEncoded

protected byte[] engineGetEncoded(java.lang.String encodingMethod)
                           throws java.io.IOException

Specified by:

engineGetEncoded in class java.security.AlgorithmParametersSpi

Throws:

java.io.IOException

engineToString

protected java.lang.String engineToString()

Specified by:

engineToString in class java.security.AlgorithmParametersSpi