de.flexiprovider.ec.parameters
Class ECParameters

java.lang.Object
  |
  +--java.security.AlgorithmParametersSpi
        |
        +--de.flexiprovider.api.parameters.AlgorithmParameters
              |
              +--de.flexiprovider.ec.parameters.ECParameters

public class ECParameters

extends AlgorithmParameters

This class specifies the EC Domain Parameters for the standard IEEE 1363 . For further information, please consult the package description of de.flexiprovider.ec.ecparameters, de.flexiprovider.ec.ecdsa, de.flexiprovider.ec.ecnr, or de.flexiprovider.ec.ecdh.

Author:

Birgit Henhapl

Field Summary

static java.lang.String

OID The OID for ECDSA parameters.

Constructor Summary

ECParameters()

Method Summary

ECDomainParameters	getASN1Params() Returns the ECParameters in an ASN.1 syntax.
byte[]	getEncoded() Return the parameters encoded in the primary encoding format (ASN.1).
byte[]	getEncoded(java.lang.String format) Return the parameters encoded in the specified encoding format.
AlgorithmParameterSpec	getParameterSpec(java.lang.Class paramSpec) Return a transparent specification of this object.
void	init(AlgorithmParameterSpec params) Initialize this parameters object using the given parameter specification.
void	init(byte[] encParams) Import the specified parameters and decode them according to the primary decoding format.
void	init(byte[] encParams, java.lang.String format) Import the specified parameters and decode them according to the specified decoding format.
java.lang.String	toString()

Methods inherited from class de.flexiprovider.api.parameters.AlgorithmParameters

engineGetEncoded, engineGetEncoded, engineGetParameterSpec, engineInit, engineInit, engineInit, engineToString

Methods inherited from class java.lang.Object

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

Field Detail

OID

public static final java.lang.String OID

The OID for ECDSA parameters.

Constructor Detail

ECParameters

public ECParameters()

Method Detail

init

public void init(AlgorithmParameterSpec params)
          throws InvalidParameterSpecException

Initialize this parameters object using the given parameter specification. The parameter specification has to be an instance of CurveParams.

Overrides:

init in class AlgorithmParameters

Parameters:

params - the parameter specification

Throws:

InvalidParameterSpecException - if the parameter specification is null or of an unsupported type.

init

public void init(byte[] encParams)
          throws java.io.IOException

Import the specified parameters and decode them according to the primary decoding format. The primary decoding format for parameters is ASN.1.

Overrides:

init in class AlgorithmParameters

Parameters:

encParams - the encoded parameters.

Throws:

java.io.IOException - on decoding errors

init

public void init(byte[] encParams,
                 java.lang.String format)
          throws java.io.IOException

Import the specified parameters and decode them according to the specified decoding format. Currently, only the primary decoding format (ASN.1) is supported.

Overrides:

init in class AlgorithmParameters

Parameters:

encParams - the encoded parameters

format - the name of the decoding format

Throws:

java.io.IOException - if format is not equal to "ASN.1" or on decoding errors.

getEncoded

public byte[] getEncoded()

Return the parameters encoded in the primary encoding format (ASN.1).

Overrides:

getEncoded in class AlgorithmParameters

Returns:

the encoded parameters

getEncoded

public byte[] getEncoded(java.lang.String format)
                  throws java.io.IOException

Return the parameters encoded in the specified encoding format. Currently, only the primary encoding format (ASN.1) is supported.

Overrides:

getEncoded in class AlgorithmParameters

Parameters:

format - the name of the encoding format

Returns:

the encoded parameters

Throws:

java.io.IOException - if format is not equal to "ASN.1" or on decoding errors.

getParameterSpec

public AlgorithmParameterSpec getParameterSpec(java.lang.Class paramSpec)
                                        throws InvalidParameterSpecException

Return a transparent specification of this object. paramSpec identifies the specification class in which the parameters should be returned.

Overrides:

getParameterSpec in class AlgorithmParameters

Parameters:

paramSpec - the class of which an instance is to be returned

Returns:

a specification of this object

Throws:

InvalidParameterSpecException - if paramSpec is null or not the same as or a superclass of the type of parameters specified by init(AlgorithmParameterSpec) or by init(byte[]).

toString

public java.lang.String toString()

Overrides:

toString in class AlgorithmParameters

Returns:

a human readable form of these parameters

getASN1Params

public ECDomainParameters getASN1Params()

Returns the ECParameters in an ASN.1 syntax.

Returns:

the ECParameters in an ASN.1 syntax