com.ibm.crypto.provider
Class DSAParameters

java.lang.Object
  java.security.AlgorithmParametersSpi
      com.ibm.crypto.provider.DSAParameters

public class DSAParameters

extends AlgorithmParametersSpi

This class implements Digital Signature Algorithm paremters specified by FIPS 186 standard.

Field Summary

protected BigInteger	g
protected BigInteger	p
protected BigInteger	q

Constructor Summary

DSAParameters()

Method Summary

protected byte[]	engineGetEncoded() Returns the parameters in encoded bytes.
protected byte[]	engineGetEncoded(String encodingMethod) Returns the parameters in encoded bytes with encoding method specified.
protected AlgorithmParameterSpec	engineGetParameterSpec(Class paramSpec) Return the parameter spec used by this parameter instance.
protected void	engineInit(AlgorithmParameterSpec paramSpec) Initialize the DSAParameters by a DSAParameterSpec
protected void	engineInit(byte[] params) Initialize the DSAParameters by encoded bytes
protected void	engineInit(byte[] params, String decodingMethod) Initialize the DSAParameters by encoded bytes with the specified decoding method.
protected String	engineToString()

Methods inherited from class java.lang.Object

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

Field Detail

p

protected BigInteger p

q

protected BigInteger q

g

protected BigInteger g

Constructor Detail

DSAParameters

public DSAParameters()

Method Detail

engineInit

protected void engineInit(AlgorithmParameterSpec paramSpec)
                   throws InvalidParameterSpecException

Initialize the DSAParameters by a DSAParameterSpec

Parameters:

paramSpec - the DSA algorithm parameter spec for this instance.

Throws:

InvalidParameterSpecException

engineInit

protected void engineInit(byte[] params)
                   throws IOException

Initialize the DSAParameters by encoded bytes

Parameters:

params - the encoded bytes of the parameters.

Throws:

IOException

engineInit

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

Initialize the DSAParameters by encoded bytes with the specified decoding method.

Parameters:

params - the encoded bytes of the parameters.

decodingMethod - the decoding method to be used.

Throws:

IOException

engineGetParameterSpec

protected AlgorithmParameterSpec engineGetParameterSpec(Class paramSpec)
                                                 throws InvalidParameterSpecException

Return the parameter spec used by this parameter instance.

Parameters:

paramSpec - the parameter spec class to be returned

Returns:

AlgorithmParameterSpec the newly generated parameterSpec

Throws:

InvalidParameterSpecException

engineGetEncoded

protected byte[] engineGetEncoded()
                           throws IOException

Returns the parameters in encoded bytes.

Returns:

byte[] the encoded parameters

Throws:

IOException

engineGetEncoded

protected byte[] engineGetEncoded(String encodingMethod)
                           throws IOException

Returns the parameters in encoded bytes with encoding method specified.

Returns:

byte[] encoded parameters.

Throws:

IOException

engineToString

protected String engineToString()