org.openeuler.sun.security.util

类 ECParameters

java.lang.Object

java.security.AlgorithmParametersSpi

org.openeuler.sun.security.util.ECParameters

public final class ECParameters
extends 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
 

This class is a modified version of the ECParameters class in the Sun library, designed to adapt to the SM2 algorithm.

另请参阅:

ECParameters

字段概要

字段

限定符和类型	字段和说明
private ECNamedCurve	namedCurve

构造器概要

构造器

构造器和说明
ECParameters()

方法概要

限定符和类型	方法和说明
protected byte[]	engineGetEncoded()
protected byte[]	engineGetEncoded(String encodingMethod)
protected <T extends AlgorithmParameterSpec> T	engineGetParameterSpec(Class<T> spec)
protected void	engineInit(AlgorithmParameterSpec paramSpec)
protected void	engineInit(byte[] params)
protected void	engineInit(byte[] params, String decodingMethod)
protected String	engineToString()
static AlgorithmParameters	getAlgorithmParameters(ECParameterSpec spec)

从类继承的方法 java.lang.Object

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

字段详细资料

namedCurve

private ECNamedCurve namedCurve

构造器详细资料

ECParameters

public ECParameters()

方法详细资料

getAlgorithmParameters

public static AlgorithmParameters getAlgorithmParameters(ECParameterSpec spec)
                                                  throws InvalidKeyException

抛出:

InvalidKeyException

engineInit

protected void engineInit(AlgorithmParameterSpec paramSpec)
                   throws InvalidParameterSpecException

指定者:

engineInit 在类中 AlgorithmParametersSpi

抛出:

InvalidParameterSpecException

engineInit

protected void engineInit(byte[] params)
                   throws IOException

指定者:

engineInit 在类中 AlgorithmParametersSpi

抛出:

IOException

engineInit

protected void engineInit(byte[] params,
                          String decodingMethod)
                   throws IOException

指定者:

engineInit 在类中 AlgorithmParametersSpi

抛出:

IOException

engineGetParameterSpec

protected <T extends AlgorithmParameterSpec> T engineGetParameterSpec(Class<T> spec)
                                                               throws InvalidParameterSpecException

指定者:

engineGetParameterSpec 在类中 AlgorithmParametersSpi

抛出:

InvalidParameterSpecException

engineGetEncoded

protected byte[] engineGetEncoded()
                           throws IOException

指定者:

engineGetEncoded 在类中 AlgorithmParametersSpi

抛出:

IOException

engineGetEncoded

protected byte[] engineGetEncoded(String encodingMethod)
                           throws IOException

指定者:

engineGetEncoded 在类中 AlgorithmParametersSpi

抛出:

IOException

engineToString

protected String engineToString()

指定者:

engineToString 在类中 AlgorithmParametersSpi