de.fhg.igd.crypto
Class DESParameters

java.lang.Object
  java.security.AlgorithmParametersSpi
      de.fhg.igd.crypto.DESParameters

public class DESParameters
extends AlgorithmParametersSpi

This class represents a DES Parameter as defined in RFC 2311 : S/MIME Version 2 Message Specification.

Version:

"$Id: DESParameters.java 1913 2007-08-08 02:41:53Z jpeters $"

Author:

Oliver Neumann

Field Summary

protected byte[]

iv_ The initialisation vector (IV), consisting of 8 bytes.

Constructor Summary

DESParameters()

Method Summary

byte[]	engineGetEncoded()
byte[]	engineGetEncoded(String format) This method returns the ASN.1/DER encoded parameter structure as defined in the S/MIME standard.
AlgorithmParameterSpec	engineGetParameterSpec(Class paramSpec)
void	engineInit(AlgorithmParameterSpec paramSpec) This method accepts an IvParameterSpec.
void	engineInit(byte[] encoded) This method expects DER encoded DESParameters as defined in the S/MIME standard.
void	engineInit(byte[] params, String format) This method ignores the format string and attempts to decode according to ASN.1/DER and the parameter structure defined in the S/MIME standard.
String	engineToString()
static void	main(String[] argv)

Methods inherited from class java.lang.Object

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

Field Detail

iv_

protected byte[] iv_

The initialisation vector (IV), consisting of 8 bytes.

Constructor Detail

DESParameters

public DESParameters()

Method Detail

main

public static void main(String[] argv)

engineInit

public void engineInit(AlgorithmParameterSpec paramSpec)
                throws InvalidParameterSpecException

This method accepts an IvParameterSpec. Other specs cause an exception being thrown.

Specified by:

engineInit in class AlgorithmParametersSpi

Parameters:

paramSpec - The IvParameterSpec with the IV.

Throws:

InvalidParameterSpecException

engineInit

public void engineInit(byte[] encoded)
                throws IOException

This method expects DER encoded DESParameters as defined in the S/MIME standard. In case of a bad encoding an IllegalArgumentException is thrown.

Specified by:

engineInit in class AlgorithmParametersSpi

Parameters:

encoded - The encoded algorithm parameters.

Throws:

IllegalArgumentException - in case of a bad encoding.

IOException

engineInit

public void engineInit(byte[] params,
                       String format)
                throws IOException

This method ignores the format string and attempts to decode according to ASN.1/DER and the parameter structure defined in the S/MIME standard.

Specified by:

engineInit in class AlgorithmParametersSpi

Throws:

IOException

engineGetParameterSpec

public AlgorithmParameterSpec engineGetParameterSpec(Class paramSpec)
                                              throws InvalidParameterSpecException

Specified by:

engineGetParameterSpec in class AlgorithmParametersSpi

Throws:

InvalidParameterSpecException

engineGetEncoded

public byte[] engineGetEncoded()
                        throws IOException

Specified by:

engineGetEncoded in class AlgorithmParametersSpi

Throws:

IOException

engineGetEncoded

public byte[] engineGetEncoded(String format)
                        throws IOException

This method returns the ASN.1/DER encoded parameter structure as defined in the S/MIME standard. The format string is ignored since no standardised names exist for different encoding formats.

Specified by:

engineGetEncoded in class AlgorithmParametersSpi

Parameters:

format - The name of the encoding format; this parameter is ignored.

Returns:

The ASN.1/DER encoded S/MIME DESParameters.

Throws:

IOException

engineToString

public String engineToString()

Specified by:

engineToString in class AlgorithmParametersSpi