KeyManagerFactory

public class KeyManagerFactory extends Object

This class acts as a factory for key managers based on a source of key material. Each key manager manages a specific type of key material for use by secure sockets. The key material is based on a KeyStore and/or provider specific sources.

See Also

Protected Constructor Summary

KeyManagerFactory(KeyManagerFactorySpi factorySpi, Provider provider, String algorithm)
Creates a KeyManagerFactory object.

Public Method Summary

final String
getAlgorithm()
Returns the algorithm name of this KeyManagerFactory object.
final static String
getDefaultAlgorithm()
Obtains the default KeyManagerFactory algorithm name.
final static KeyManagerFactory
getInstance(String algorithm)
Returns a KeyManagerFactory object that acts as a factory for key managers.
final static KeyManagerFactory
getInstance(String algorithm, String provider)
Returns a KeyManagerFactory object that acts as a factory for key managers.
final static KeyManagerFactory
getInstance(String algorithm, Provider provider)
Returns a KeyManagerFactory object that acts as a factory for key managers.
final KeyManager[]
getKeyManagers()
Returns one key manager for each type of key material.
final Provider
getProvider()
Returns the provider of this KeyManagerFactory object.
final void
init(ManagerFactoryParameters spec)
Initializes this factory with a source of provider-specific key material.
final void
init(KeyStore ks, char[] password)
Initializes this factory with a source of key material.

Inherited Method Summary

Protected Constructors

protected KeyManagerFactory (KeyManagerFactorySpi factorySpi, Provider provider, String algorithm)

Creates a KeyManagerFactory object.

Parameters
factorySpi the delegate
provider the provider
algorithm the algorithm

Public Methods

public final String getAlgorithm ()

Returns the algorithm name of this KeyManagerFactory object.

This is the same name that was specified in one of the getInstance calls that created this KeyManagerFactory object.

Returns
  • the algorithm name of this KeyManagerFactory object.

public static final String getDefaultAlgorithm ()

Obtains the default KeyManagerFactory algorithm name.

The default algorithm can be changed at runtime by setting the value of the "ssl.KeyManagerFactory.algorithm" security property (set in the Java security properties file or by calling setProperty(java.lang.String, java.lang.String)) to the desired algorithm name.

Returns
  • the default algorithm name as specified in the Java security properties, or an implementation-specific default if no such property exists.

public static final KeyManagerFactory getInstance (String algorithm)

Returns a KeyManagerFactory object that acts as a factory for key managers.

This method traverses the list of registered security Providers, starting with the most preferred Provider. A new KeyManagerFactory object encapsulating the KeyManagerFactorySpi implementation from the first Provider that supports the specified algorithm is returned.

Note that the list of registered providers may be retrieved via the Security.getProviders() method.

Parameters
algorithm the standard name of the requested algorithm. See the Java Secure Socket Extension Reference Guide for information about standard algorithm names.
Returns
  • the new KeyManagerFactory object.
Throws
NoSuchAlgorithmException if no Provider supports a KeyManagerFactorySpi implementation for the specified algorithm.
NullPointerException if algorithm is null.
See Also

public static final KeyManagerFactory getInstance (String algorithm, String provider)

Returns a KeyManagerFactory object that acts as a factory for key managers.

A new KeyManagerFactory object encapsulating the KeyManagerFactorySpi implementation from the specified provider is returned. The specified provider must be registered in the security provider list.

Note that the list of registered providers may be retrieved via the Security.getProviders() method.

Parameters
algorithm the standard name of the requested algorithm. See the Java Secure Socket Extension Reference Guide for information about standard algorithm names.
provider the name of the provider.
Returns
  • the new KeyManagerFactory object.
Throws
NoSuchAlgorithmException if a KeyManagerFactorySpi implementation for the specified algorithm is not available from the specified provider.
NoSuchProviderException if the specified provider is not registered in the security provider list.
IllegalArgumentException if the provider name is null or empty.
NullPointerException if algorithm is null.
See Also

public static final KeyManagerFactory getInstance (String algorithm, Provider provider)

Returns a KeyManagerFactory object that acts as a factory for key managers.

A new KeyManagerFactory object encapsulating the KeyManagerFactorySpi implementation from the specified Provider object is returned. Note that the specified Provider object does not have to be registered in the provider list.

Parameters
algorithm the standard name of the requested algorithm. See the Java Secure Socket Extension Reference Guide for information about standard algorithm names.
provider an instance of the provider.
Returns
  • the new KeyManagerFactory object.
Throws
NoSuchAlgorithmException if a KeyManagerFactorySpi implementation for the specified algorithm is not available from the specified Provider object.
IllegalArgumentException if provider is null.
NullPointerException if algorithm is null.
See Also

public final KeyManager[] getKeyManagers ()

Returns one key manager for each type of key material.

Returns
  • the key managers
Throws
IllegalStateException if the KeyManagerFactory is not initialized

public final Provider getProvider ()

Returns the provider of this KeyManagerFactory object.

Returns
  • the provider of this KeyManagerFactory object

public final void init (ManagerFactoryParameters spec)

Initializes this factory with a source of provider-specific key material.

In some cases, initialization parameters other than a keystore and password may be needed by a provider. Users of that particular provider are expected to pass an implementation of the appropriate ManagerFactoryParameters as defined by the provider. The provider can then call the specified methods in the ManagerFactoryParameters implementation to obtain the needed information.

Parameters
spec an implementation of a provider-specific parameter specification
Throws
InvalidAlgorithmParameterException if an error is encountered

public final void init (KeyStore ks, char[] password)

Initializes this factory with a source of key material.

The provider typically uses a KeyStore for obtaining key material for use during secure socket negotiations. The KeyStore is generally password-protected.

For more flexible initialization, please see init(ManagerFactoryParameters).

Parameters
ks the key store or null
password the password for recovering keys in the KeyStore
Throws
KeyStoreException if this operation fails
NoSuchAlgorithmException if the specified algorithm is not available from the specified provider.
UnrecoverableKeyException if the key cannot be recovered (e.g. the given password is wrong).