iaik.security.ec.eddsa

Class EdDSAKeyFactory

java.lang.Object

java.security.KeyFactorySpi

iaik.security.ec.common.EdKeyFactory

iaik.security.ec.eddsa.EdDSAKeyFactory

public final class EdDSAKeyFactory
extends EdKeyFactory

Implementation of the key factory service provider interface for EdDSA. The following transformations are implemented:

  EdPublicKey  <--> EdPublicKeySpec, X509EncodedKeySpec
  EdDSAPrivateKey <--> EdDSAPrivateKeySpec, PKCS8EncodedKeySpec
 

Author:

Sebastian Ramacher

See Also:

EdKey, EdDSAPrivateKey, EdDSAPrivateKeySpec, EdPublicKey, EdPublicKeySpec

Constructor Summary

Constructors

Constructor and Description
EdDSAKeyFactory() Default constructor.

Method Summary

Modifier and Type	Method and Description
protected PrivateKey	engineGeneratePrivate(KeySpec keySpec) Generates a private key from the given key spec.
protected <T extends KeySpec> T	engineGetKeySpec(Key key, Class<T> keySpec) Implementation of the engine method.
protected Key	engineTranslateKey(Key key) Translates the given key object of some unknown or untrusted provider into a key object supported by this EC key factory.
static EdKey	translateKey(Key key) Translates a key to an EdKey.

Methods inherited from class iaik.security.ec.common.EdKeyFactory

engineGeneratePublic, translatePublicKey

Methods inherited from class java.lang.Object

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

Constructor Detail

EdDSAKeyFactory

public EdDSAKeyFactory()

Default constructor.

Method Detail

engineGeneratePrivate

protected PrivateKey engineGeneratePrivate(KeySpec keySpec)
                                    throws InvalidKeySpecException

Generates a private key from the given key spec.

Overrides:

engineGeneratePrivate in class EdKeyFactory

Parameters:

keySpec - the key material; it may either be EdDSAPrivateKeySpec or PKCS8EncodedKeySpec

Throws:

InvalidKeySpecException - if the key spec is not supported or erroneous

engineGetKeySpec

protected <T extends KeySpec> T engineGetKeySpec(Key key,
                                                 Class<T> keySpec)
                                          throws InvalidKeySpecException

Implementation of the engine method. Converts a key into its spec.

Overrides:

engineGetKeySpec in class EdKeyFactory

Parameters:

key - the key to be converted (either EdPublicKey or EdDSAPrivateKey)

keySpec - the key specification type. If the given key is of type EdPublicKey the keySpec may be EdPublicKeySpec or X509EncodedKeySpec. Otherwise (key is of type EdDSAPrivateKey) the keySpec may be EdDSAPrivateKeySpec or PKCS8EncodedKeySpec

Returns:

the corresponding key spec

Throws:

InvalidKeySpecException - if the key cannot be transformed into the provided keySpec.

engineTranslateKey

protected Key engineTranslateKey(Key key)
                          throws InvalidKeyException

Translates the given key object of some unknown or untrusted provider into a key object supported by this EC key factory. This method can only translate keys of type EdPublicKey or EdDSAPrivateKey.

Overrides:

engineTranslateKey in class EdKeyFactory

Parameters:

key - the key to be translated

Returns:

the translated key

Throws:

InvalidKeyException - if the given key cannot be translated

translateKey

public static EdKey translateKey(Key key)
                          throws InvalidKeyException

Translates a key to an EdKey.

Parameters:

key - the key object

Returns:

an EC key object

Throws:

InvalidKeyException - if the given key cannot be translated to an EdKey