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oracle.security.crypto.core
Class DHKey

java.lang.Object
oracle.security.crypto.core.DHKey

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable, java.lang.Cloneable, java.security.Key, javax.crypto.interfaces.DHKey, ASN1Object, Streamable

Direct Known Subclasses:

DHPrivateKey, DHPublicKey

public abstract class DHKey

extends java.lang.Object

implements Key, ASN1Object, javax.crypto.interfaces.DHKey

An abstract class for Diffie-Hellman keys.

See Also:

DHParams, DHPublicKey, DHPrivateKey, Serialized Form

Field Summary

protected DHParams

params The Diffie Hellman parameters of this key.

Fields inherited from interface java.security.Key

serialVersionUID

Constructor Summary

protected	DHKey() Empty constructor.
protected	DHKey(DHParams params) Creates a DHKey with the specified DHParams.
protected	DHKey(java.io.InputStream is) Creates a DHKey from the specified input stream.

Method Summary

abstract java.lang.Object	clone() Create a deep clone of this DHKey object.
java.lang.String	getAlgorithm() Returns the algorithm for which this key is primarily used.
int	getBitLength() Returns the number of bits required to represent this key's defining key material.
DHParams	getParams() Returns the Diffie-Hellman parameters for this key.
void	readExternal(java.io.ObjectInput is) Reads the input stream and initializes the Diffie Hellman key.
abstract void	setParams(DHParams params) Sets the parameters for the Diffie-Hellman key.
void	writeExternal(java.io.ObjectOutput os) Writes to the output stream the DER encoding of this object.

Methods inherited from class java.lang.Object

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

Methods inherited from interface oracle.security.crypto.core.Key

erase, getAllowExport, getEncoded, getFormat

Methods inherited from interface oracle.security.crypto.util.Streamable

input, length, output

Field Detail

params

protected DHParams params

The Diffie Hellman parameters of this key.

Constructor Detail

DHKey

protected DHKey()

Empty constructor.

DHKey

protected DHKey(DHParams params)

Creates a DHKey with the specified DHParams.

Parameters:

params - The DH parameters of this key.

DHKey

protected DHKey(java.io.InputStream is)
         throws java.io.IOException

Creates a DHKey from the specified input stream.

Parameters:

is - The stream to read the key from.

Throws:

java.io.IOException

Method Detail

getAlgorithm

public java.lang.String getAlgorithm()

Description copied from interface: Key

Returns the algorithm for which this key is primarily used.

Specified by:

getAlgorithm in interface java.security.Key

getBitLength

public int getBitLength()

Description copied from interface: Key

Returns the number of bits required to represent this key's defining key material. For example, in the case of an RSA key, the bit length of the modulus would be returned.

clone

public abstract java.lang.Object clone()

Create a deep clone of this DHKey object.

Overrides:

clone in class java.lang.Object

Returns:

A deep clone of the Key instance.

getParams

public DHParams getParams()

Returns the Diffie-Hellman parameters for this key.

Specified by:

getParams in interface javax.crypto.interfaces.DHKey

Returns:

A DHParams object, or null if none is present in this DHKey.

setParams

public abstract void setParams(DHParams params)

Sets the parameters for the Diffie-Hellman key. This method is used to set Diffie-Hellman parameters common to a group of users which are known from application context.

Parameters:

params - An instance of DHParams.

Throws:

java.lang.IllegalArgumentException - If p, q or g is missing from the params.

writeExternal

public void writeExternal(java.io.ObjectOutput os)
                   throws java.io.IOException

Writes to the output stream the DER encoding of this object.

Specified by:

writeExternal in interface java.io.Externalizable

Parameters:

os - The output stream to write the encoding to.

Throws:

java.io.IOException

readExternal

public void readExternal(java.io.ObjectInput is)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Reads the input stream and initializes the Diffie Hellman key.

Specified by:

readExternal in interface java.io.Externalizable

Parameters:

is - The stream to read from.

Throws:

java.io.IOException

java.lang.ClassNotFoundException

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