anon.crypto
Class MyDSAPublicKey

java.lang.Object
  anon.crypto.AbstractPublicKey
      anon.crypto.MyDSAPublicKey

All Implemented Interfaces:

IMyPublicKey, IXMLEncodable, java.io.Serializable, java.security.interfaces.DSAKey, java.security.interfaces.DSAPublicKey, java.security.Key, java.security.PublicKey

public final class MyDSAPublicKey
extends AbstractPublicKey
implements java.security.interfaces.DSAPublicKey, IMyPublicKey

See Also:

Serialized Form

Field Summary

private long	m_hashValue
private MyDSAParams	m_params
private java.math.BigInteger	m_Y

Fields inherited from interface java.security.interfaces.DSAPublicKey

serialVersionUID

Fields inherited from interface anon.util.IXMLEncodable

FIELD_XML_ELEMENT_CONTAINER_NAME, FIELD_XML_ELEMENT_NAME, XML_ATTR_ID, XML_ATTR_LANGUAGE, XML_ATTR_VERSION

Constructor Summary

MyDSAPublicKey(org.bouncycastle.crypto.params.DSAPublicKeyParameters params)

MyDSAPublicKey(org.bouncycastle.asn1.x509.SubjectPublicKeyInfo info)

Method Summary

boolean	equals(java.lang.Object a_publicKey) This method returns if two public keys have the same public key parameters.
java.lang.String	getAlgorithm()
org.bouncycastle.asn1.x509.SubjectPublicKeyInfo	getAsSubjectPublicKeyInfo() Gets the key as a SubjectPublicKeyInfo object.
java.lang.String	getFormat()
int	getKeyLength() Tested this implementation with Key-lengths from 256 to 1024 Bit in 64 Bit steps.
MyDSAParams	getMyDASParams()
int	getParameterLength()
java.security.interfaces.DSAParams	getParams()
org.bouncycastle.crypto.params.DSAPublicKeyParameters	getPublicParams()
ISignatureVerificationAlgorithm	getSignatureAlgorithm() Gets a signature algorithm object for this key.
java.math.BigInteger	getY()
int	hashCode()
org.w3c.dom.Element	toXmlElement(org.w3c.dom.Document a_doc) Return an element that can be appended to the document.

Methods inherited from class anon.crypto.AbstractPublicKey

getEncoded

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.security.Key

getEncoded

Field Detail

m_Y

private java.math.BigInteger m_Y

m_params

private MyDSAParams m_params

m_hashValue

private long m_hashValue

Constructor Detail

MyDSAPublicKey

public MyDSAPublicKey(org.bouncycastle.crypto.params.DSAPublicKeyParameters params)

MyDSAPublicKey

public MyDSAPublicKey(org.bouncycastle.asn1.x509.SubjectPublicKeyInfo info)
               throws java.lang.IllegalArgumentException

Throws:

java.lang.IllegalArgumentException

Method Detail

getSignatureAlgorithm

public ISignatureVerificationAlgorithm getSignatureAlgorithm()

Gets a signature algorithm object for this key.

Specified by:

getSignatureAlgorithm in interface IMyPublicKey

Returns:

a signature algorithm object for this key

getY

public java.math.BigInteger getY()

Specified by:

getY in interface java.security.interfaces.DSAPublicKey

getParams

public java.security.interfaces.DSAParams getParams()

Specified by:

getParams in interface java.security.interfaces.DSAKey

getPublicParams

public org.bouncycastle.crypto.params.DSAPublicKeyParameters getPublicParams()

getMyDASParams

public MyDSAParams getMyDASParams()

getAlgorithm

public java.lang.String getAlgorithm()

Specified by:

getAlgorithm in interface java.security.Key

getFormat

public java.lang.String getFormat()

Specified by:

getFormat in interface java.security.Key

getAsSubjectPublicKeyInfo

public org.bouncycastle.asn1.x509.SubjectPublicKeyInfo getAsSubjectPublicKeyInfo()

Description copied from interface: IMyPublicKey

Gets the key as a SubjectPublicKeyInfo object.

Specified by:

getAsSubjectPublicKeyInfo in interface IMyPublicKey

Returns:

the key as a SubjectPublicKeyInfo object

toXmlElement

public org.w3c.dom.Element toXmlElement(org.w3c.dom.Document a_doc)

Description copied from interface: IXMLEncodable

Return an element that can be appended to the document. This Method must not change the document in any way!

Specified by:

toXmlElement in interface IXMLEncodable

Parameters:

a_doc - a document

Returns:

the interface as xml element

equals

public boolean equals(java.lang.Object a_publicKey)

This method returns if two public keys have the same public key parameters.

Specified by:

equals in interface IMyPublicKey

Specified by:

equals in class AbstractPublicKey

Parameters:

a_publicKey - an other public key

Returns:

true if the keys have the same public key parameters; false otherwise

hashCode

public int hashCode()

Specified by:

hashCode in interface IMyPublicKey

Specified by:

hashCode in class AbstractPublicKey

Returns:

the public key`s hash code

See Also:

Object.hashCode()

getKeyLength

public int getKeyLength()

Tested this implementation with Key-lengths from 256 to 1024 Bit in 64 Bit steps. Always calculated the right size that was handed over to the KeyPairGenerator. The actual size of the PublicKey is some bytes larger and the Parameters are about twice as long as Y. But getKeyLength() is intended to give a hint about the encryption strength, so this should be the best implementation.

Specified by:

getKeyLength in interface IMyPublicKey

Returns:

the length of the key

getParameterLength

public int getParameterLength()