jsdsi.util
Class KeyPairFactory

java.lang.Object
  jsdsi.util.KeyPairFactory

public final class KeyPairFactory

extends java.lang.Object

Convenience class for generating java.security.KeyPair 's.

This class maintains a cache of KeyPairGenerators retrieved from the JCE for performance.

Note: Care should be taken when creating Keys without specifying a keysize, SecureRandom, or any AlgorithmParameterSpec, as it has been noted that without, keys are predictable when using some Providers.

Version:

$Revision: 1.7 $ $Date: 2004/11/12 09:53:49 $

Author:

Sean Radford

Method Summary

static java.security.KeyPair	create(KeyEnum keyEnum) Generates a KeyPair of the given keyEnum type.
static java.security.KeyPair	create(KeyEnum keyEnum, int keysize) Generates a KeyPair of the given keyEnum type and key size.
static java.security.KeyPair	create(KeyEnum keyEnum, int keysize, java.net.URI[] uris) Generates a KeyPair of the given keyEnum type and uris.
static java.security.KeyPair	create(KeyEnum keyEnum, java.net.URI[] uris) Generates a KeyPair of the given keyEnum type with the given uris.
static java.security.KeyPairGenerator	getKeyPairGenerator(KeyEnum keyEnum, int keysize, java.net.URI[] uris) Retrieves a KeyPairGenerator.

Methods inherited from class java.lang.Object

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

Method Detail

create

public static java.security.KeyPair create(KeyEnum keyEnum)
                                    throws java.security.NoSuchAlgorithmException

Generates a KeyPair of the given keyEnum type. The public key of the KeyPair is a jsdsi.Principal.

Parameters:

keyEnum - the key algorithm.

Returns:

the new KeyPair

Throws:

java.security.NoSuchAlgorithmException - if the algorithm is not available in the environment.

create

public static java.security.KeyPair create(KeyEnum keyEnum,
                                           int keysize)
                                    throws java.security.NoSuchAlgorithmException

Generates a KeyPair of the given keyEnum type and key size. The public key of the KeyPair is a jsdsi.Principal.

Parameters:

keyEnum - the key algorithm.

keysize - the keysize. This is an algorithm-specific metric, such as modulus length, specified in number of bits.

Returns:

the new KeyPair

Throws:

java.security.NoSuchAlgorithmException - if the algorithm is not available in the environment.

create

public static java.security.KeyPair create(KeyEnum keyEnum,
                                           java.net.URI[] uris)
                                    throws java.security.NoSuchAlgorithmException

Generates a KeyPair of the given keyEnum type with the given uris. The public key of the KeyPair is a jsdsi.Principal.

Parameters:

keyEnum - the key algorithm.

uris - URI's where information about the Principal may be sought

Returns:

the new KeyPair

Throws:

java.security.NoSuchAlgorithmException - if the algorithm is not available in the environment.

create

public static java.security.KeyPair create(KeyEnum keyEnum,
                                           int keysize,
                                           java.net.URI[] uris)
                                    throws java.security.NoSuchAlgorithmException

Generates a KeyPair of the given keyEnum type and uris. The public key of the KeyPair is a jsdsi.Principal.

Parameters:

keyEnum - the key algorithm.

keysize - the keysize. This is an algorithm-specific metric, such as modulus length, specified in number of bits.

uris - URI's where information about the Principal may be sought

Returns:

the new KeyPair

Throws:

java.security.NoSuchAlgorithmException - if the algorithm is not available in the environment.

getKeyPairGenerator

public static java.security.KeyPairGenerator getKeyPairGenerator(KeyEnum keyEnum,
                                                                 int keysize,
                                                                 java.net.URI[] uris)
                                                          throws java.security.NoSuchAlgorithmException

Retrieves a KeyPairGenerator.

Parameters:

keyEnum -

keysize -

uris -

Returns:

the KeyPairGenerator

Throws:

java.security.NoSuchAlgorithmException